Phase II Environmental Site Assessment Report (Revision 1)

18th Street Viaduct City Project No. 6725-663-052 IDOT Project No. HDP-7057(694)-71-97 AND 18th Street Storm Sewer Trail & Connection to Floyd River Levee City Project No. 719-071

18th Street and Floyd Boulevard Sioux City, Iowa

Prepared for: JEO 2700 Fletcher Avenue Lincoln, NE 68504

February 15, 2016 TG Project No. 15428.01

THIELE GEOTECH, INC. 13478 Chandler Road Omaha, Nebraska 68138-3716 402.556.2171 Fax 402.556.7831 www.thielegeotech.com

GEOTECHNICAL MATERIAL ENVIRONMENTAL ENGINEERING Phase II Environmental Site Assessment 18th Street Viaduct

Table of Contents

1.0 INTRODUCTION...... 1

2.0 SITE LOCATION, TOPOGRAPHY, AND UTILIZATION ...... 3

3.0 EXPLORATION METHODS ...... 4 3.1 EXPLORATION PROCEDURES ...... 4 3.2 SOIL SAMPLING ...... 5 3.3 GROUND WATER SAMPLING ...... 6 3.4 CONTAMINATION REDUCTION ...... 6

4.0 ASSESSMENT RESULTS ...... 8 4.1 SITE LITHOLOGY ...... 8 4.2 SOIL ANALYSIS RESULTS ...... 9 4.3 GROUND WATER ANALYSIS RESULTS...... 15

5.0 CONCLUSIONS AND RECOMMENDATIONS ...... 19 5.1 CONCLUSIONS ...... 19 5.2 RECOMMENDATIONS ...... 20

6.0 LIMITATIONS ...... 22

7.0 CERTIFICATION AND SIGNATURE ...... 23 APPENDIX BORING LOCATION PLANS SITE VICINITY MAP TOPOGRAPHIC MAP PARCEL MAP LEGEND OF TERMS BORING LOGS REPORTS OF ANALYSIS

Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 1

1.0 INTRODUCTION

Our understanding of the project is based upon information provided by JEO Consulting Group, Inc.

The project consists of design and construction of the 18th Street Viaduct, which will provide grade separation over the Union Pacific Railroad (UPRR) and Canadian National (CN) mainline tracks beginning at the intersection of 18th Street and Steuben Street and terminating at Floyd Boulevard in Sioux City, Iowa. The new viaduct will also include pedestrian accommodations to connect the adjacent neighborhoods west of Floyd Boulevard and to the future pedestrian trail planned for the north side of 18th Street. The future trail project will provide a connection to the Floyd River Trail System.

The viaduct will be 492’-5” long between the two centerlines of abutment bearing. The structure will have six intermediate piers that will be supported with HP 10x57 driven piles. The abutments will also be supported on HP 10x57 driven piles.

Maximum fills of approximately 18 feet at the west abutment and 30 feet at the east abutment are planned. The east abutment is anticipated to be retained with mechanically stabilized earth walls. The west approach and abutment will be constructed as an embankment with permanent slopes.

The project will also consist of at grade street improvements on the east side of the UP railroad tracks. The streets improvements include Steuben Street to the south, Hawkeye Drive and Illinois Avenue to the north and Cargill Road extending from Hawkeye Drive south to the south side of the viaduct. A truck staging area is also planned just north of the viaduct following completion of the grade separation project.

Sewers are also planned for the project. The sewers will consist of 15” to 60” diameter IDOT Class 2000D reinforced concrete pipe and will have invert elevations ranging from 1122.43 feet to 1088.14 feet. These sewers will be installed with cut and cover techniques. The sewer line project from the viaduct project to the outfall in the Floyd River will be completed at a later date as a separate construction project.

Historical aerial photographs, topographic maps, Sanborn Fire Insurance Maps, previous regulatory reports, NEPA documentation, and Woodbury County Assessor’s information were reviewed and indicated that the subject property was previously used for various industrial and commercial activities with potential for environmental impact.

This Phase II ESA included the advancement of fifteen (15) soil borings. Borings were advanced at pier/abutment locations 2-6, 8, and 9. Six (6) additional shallow borings were advanced at proposed surface pavement locations and sewer corridors. The surface pavement and sewer borings were

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 2 advanced to 2-35 feet below ground surface (bgs) and pier/abutment borings were advanced to 35-45 feet bgs. Eight (8) borings were converted into temporary monitoring wells. Soil and ground water sampling, field screening of recovered soil samples, and analytical testing of select recovered soil and ground water samples was conducted.

This ESA is an instrument of service for the exclusive use of our client and its representative(s) only. Representatives for this project include, but are not limited to, the City of Sioux City and the Iowa Department of Transportation (IDOT). No third party may use this report or any information contained herein. With the permission of our client, Thiele Geotech, Inc. may authorize a third party to rely on the information contained in this report, but only to the extent of the technological and other limitations described herein. It is important to note this ESA does not constitute a guarantee or warranty of the environmental condition of the subject property.

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 3

2.0 SITE LOCATION, TOPOGRAPHY, AND UTILIZATION

The subject property is identified as the 18th Street Viaduct, and is generally located on 18th Street south of Floyd Boulevard, Sioux City, Iowa. The property consists of active commercial, residential, and municipal properties on approximately 35 acres of land. Currently, the subject property is multiple parcels with varied use. Uses range from railyards, parking lots, city maintenance facilities, agricultural processing and residences.

The general legal descriptions for property associated with this site are included in the parcel information obtained from the Woodbury County Assessors website included within the Appendix. The site is generally located within the Southeast Quarter of Section 21, Township 89 North, Range 47 West and the Southwest Quarter of Section 22, Township 89 North, Range 47 West of the 5th P.M., Woodbury County, Iowa. The Site Vicinity Map, Topographic Map, and Parcel Map, attached in the Appendix, further illustrate the disposition of the subject property and the neighboring properties.

Due to varied configuration of the subject property, recent uses were arranged according to properties at streets in respective directions. Current site usage is summarized in Table 1, below.

TABLE 1, CURRENT SITE USEAGE Floyd Boulevard (south of 19th Street) – East: Union Pacific Railyard Hawkeye Drive (20th Street to 19th Street) – Southwest: Mixed Residential and Commercial (City maintenance buildings and storage) 18th Street (Hawkeye Drive to Illinois Avenue) – South: Cargill Inc., soybean divisions processing & laboratory 18th Street (Illinois Avenue to Floyd River) – North: City of Sioux City fleet maintenance and city water services facility

As shown on the updated USGS 7.5 Minute Topographic Map, Sioux City North, Iowa Quadrangle, a portion of which is included in the Appendix, the site elevation is approximately 1,100 to 1,140 feet above mean sea level (MSL). The scale of this map is 1” = 2,000’ and has a contour interval of 20 feet. The topography of the subject property is sloping toward the east/southeast with approximately 40 feet of relief.

Based on the topography and surface water flow directions observed during field activities, we anticipate that the majority of the site-specific ground water flow direction is to the east/southeast. The overall regional ground water flow direction in the vicinity of the property is reported to be to the east toward the Floyd River, less than one-half mile east of the subject property. Static depth to ground water measured during the field activities was 22.1-31.9 feet below ground surface.

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3.0 EXPLORATION METHODS

3.1 EXPLORATION PROCEDURES Fifteen (15) soil borings were advanced on the assessment site during this investigation. Borings were advanced at pier/abutment locations 2-6, 8, and 9. Six (6) additional borings were advanced at proposed surface pavement locations and sewer corridors. The surface pavement and sewer borings were advanced to 2-35 feet below ground surface (bgs) and pier/abutment borings were advanced to 35-45 feet bgs. Eight (8) borings were converted into temporary monitoring wells. Soil and ground water sampling, field screening of recovered soil samples, and analytical testing of select recovered soil and ground water samples was conducted. Borings were placed at accessible locations within areas with potential for environmental impact. These locations are summarized in Table 2, below.

TABLE 2, SAMPLE LOCATION SUMMARY Sample Location (Proposed Environmental Concern(s) Contaminants of Concern Infrastructure) B-2E Railyard VOCs, SVOCs, Priority Pollutant Metals, (Bridge Pier) Petroleum Hydrocarbons, PCBs, Pesticides B-3E Railyard VOCs, SVOCs, Priority Pollutant Metals, (Bridge Pier) Petroleum Hydrocarbons, PCBs, Pesticides B-4E Railyard VOCs, SVOCs, Priority Pollutant Metals, (Bridge Pier) Petroleum Hydrocarbons, PCBs, Pesticides B-5E Railyard VOCs, SVOCs, Priority Pollutant Metals, (Bridge Pier) Petroleum Hydrocarbons, PCBs, Pesticides B-6E Railyard VOCs, SVOCs, Priority Pollutant Metals, (Bridge Pier) Petroleum Hydrocarbons, PCBs, Pesticides B-8E Railyard VOCs, SVOCs, Priority Pollutant Metals, (Bridge Pier) Petroleum Hydrocarbons, PCBs, Pesticides B-9E Railroad/Other historical industrial VOCs, SVOCs, Priority Pollutant Metals, (Bridge Abutment) activities Petroleum Hydrocarbons, PCBs, Pesticides B-11E Railroad/Other historical industrial VOCs, SVOCs, Priority Pollutant Metals, (Bridge Abutment/Surface activities Petroleum Hydrocarbons, PCBs, Pesticides Pavement) B-13E Fleet maintenance facility fleet VOCs, SVOCs, Priority Pollutant Metals, (Sewer Corridor) fueling system/Historical landfill Petroleum Hydrocarbons, PCBs, Pesticides activities B-14E Fleet maintenance facility fleet VOCs, SVOCs, Priority Pollutant Metals, (Sewer Corridor) fueling system/Historical landfill Petroleum Hydrocarbons, PCBs, Pesticides activities B-17E Railroad/Other historical industrial VOCs, SVOCs, Priority Pollutant Metals, (Surface Pavement/Sewer activities Petroleum Hydrocarbons, PCBs, Pesticides Corridor) B-19E Railroad/Other historical industrial VOCs, SVOCs, Priority Pollutant Metals, (Surface Pavement) activities Petroleum Hydrocarbons, PCBs, Pesticides B-20E Railroad/Other historical industrial VOCs, SVOCs, Priority Pollutant Metals, (Surface Pavement) activities Petroleum Hydrocarbons, PCBs, Pesticides B-22E Railroad/Other historical industrial VOCs, SVOCs, Priority Pollutant Metals, (Surface Pavement) activities Petroleum Hydrocarbons, PCBs, Pesticides B-24E Railroad/Other historical industrial VOCs, SVOCs, Priority Pollutant Metals, (Surface Pavement) activities Petroleum Hydrocarbons, PCBs, Pesticides

The locations of the soil borings are illustrated on the Boring Location Plan in the Appendix.

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Each boring was advanced with a Geoprobe® Model 7822DT direct push machine, incorporating standard direct push techniques. After boring advancement, 1-inch diameter, temporary monitoring wells were installed in select borings in order to screen for contaminants of concern within ground water. One-inch nominal diameter, schedule 40 PVC screen with 0.010-inch machined slots and a bottom cap was set at the bottom of each boring. One-inch nominal diameter, schedule 40 PVC, flush-threaded riser was connected to the screen and set near ground surface. The top of the casing was sealed with an expandable, lockable plug. Sand pack was placed to 2 feet above the top of the screen. Bentonite chips were placed atop the sand pack to approximately 8 inches bgs.

3.2 SOIL SAMPLING Soil sampling was conducted at each boring advanced during this investigation. Soil samples from within these borings were collected continuously at 5-foot vertical intervals. These samples were collected in RPVC liners with the Geoprobe DT22 dual-tube sampling system.

A geologist described recovered soil samples collected during this investigation. Sample descriptions included color, moisture content, consistency, sediment type, geologic origin, and notations of visual and/or olfactory evidence of contamination.

Recovered intervals were screened at one foot intervals with a 10.6 eV photoionization detector (PID). The field screening concentration from each interval was then recorded on the boring logs located within the Appendix. Prior to conducting field screening, the PID was zeroed and calibrated with laboratory prepared calibration gas. The calibration gas used to calibrate the PID was a 100 ppm concentration of isobutylene. The results of the field screening are summarized in Section 4.2 of this report.

The sample with the highest field screening concentration from select borings was selected for volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs) analysis. If field screening indicated no elevated concentrations, samples submitted for VOC and SVOC analysis were based upon visual or olfactory evidence of potential contamination. If no visual and/or olfactory cues were observed, the sample was collected from the area observed to be at or within approximately 1-3 feet above the water table. Samples submitted for metals, pesticide, and PCB analyses were based upon visual and olfactory evidence of potential contamination.

Soil samples selected for laboratory analysis were placed into laboratory provided, new, clean, sample jars. The samples were cooled to approximately 4º C with ice in a cooler and maintained at approximately that temperature throughout delivery to the laboratory.

Soil samples submitted for analytical testing were maintained under a sample chain-of-custody through delivery to Test America Laboratories (Test America) in Cedar Falls, Iowa. Based upon historical site information, field observations and analysis, soil samples from select locations were submitted to the laboratory for analysis of select contaminants of concern (COCs). These COCs included select volatile

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 6 organic compounds (VOCs) by EPA Method 8260, semi-volatile compounds (SVOC’s) by EPA Method 8270, common petroleum hydrocarbons by Iowa Method OA-2, priority pollutant metals by EPA Methods 6010/7010/7471, organochlorine pesticides by EPA Method 8081, and polychlorinated biphenyls (PCBs) by EPA Method 8082. The results of laboratory analysis conducted on these soil samples are summarized in Section 4.2 of this report.

Following sampling, borings not converted into temporary wells were plugged. The borings were plugged by backfilling the remaining void with bentonite chips.

3.3 GROUND WATER SAMPLING Eight (8) soil borings advanced during this investigation were converted into temporary monitoring wells. Seven (7) of the locations were based upon pier/abutment locations for the viaduct project, and the eighth location was determined necessary for the sewer project, based upon field observations. Wells at borings B-3E and B-6E did not yield sufficient water for sampling and were not sampled. The remaining six (6) temporary monitoring wells were developed by removing at least 2,500 milliliters of ground water using a bladder pump. Ground water within each boring was allowed to stabilize for approximately one hour prior to sampling. Ground water sampling was accomplished using a bladder pump and single use polyethylene bladders and tubing.

Ground water samples were decanted into laboratory provided, new, clean sample jars. Following sampling, all ground water samples were cooled to approximately 4º C with ice in a cooler and maintained at approximately that temperature throughout delivery to the laboratory.

Ground water samples submitted for analytical testing were maintained under a sample chain-of-custody through delivery to Test America. Based upon historical site information, ground water samples from each location were analyzed for select COCs. These COCs included select volatile organic compounds (VOCs) by EPA Method 8260, semi-volatile compounds (SVOCs) by EPA Method 8270, common petroleum hydrocarbons by Iowa Method OA-2, priority pollutant metals by EPA Method 6010 and 7471, organochlorine pesticides by EPA Method 8081, and polychlorinated biphenyls (PCBs) by EPA Method 8082. The results of laboratory analysis conducted on the submitted ground water samples are summarized in Section 4.3 of this report.

Following sampling, the on-site temporary monitoring wells were abandoned. Temporary monitoring wells were abandoned by first removing the PVC casing and backfilling the remaining void with bentonite chips.

3.4 CONTAMINATION REDUCTION Potential cross-contamination of soil and ground water samples was minimized by utilization of contamination reduction procedures.

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Cross-contamination of soil samples was minimized by the incorporation of decontamination procedures for all probe and soil sampling equipment. All large equipment (i.e. direct push machine and probe rods) were decontaminated via a high pressure hot water wash prior to arriving on-site, between each boring location, and before leaving the site. All smaller drilling and sampling equipment (i.e. sample tubes and fittings) were decontaminated via an Alconox wash and fresh water rinse between each sampling interval.

Cross-contamination of ground water samples was minimized through the use of disposable, single use sampling equipment and laboratory provided and cleaned sample containers. Personnel involved in development and sampling of the wells wore new, disposable gloves for each phase of development and sampling. Following installation of the temporary monitoring wells and prior to ground water sampling, the annulus surrounding the temporary monitoring wells was sealed with hydrated bentonite chips to minimize potential for introduction of surficial contaminants to the ground water.

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4.0 ASSESSMENT RESULTS

4.1 SITE LITHOLOGY The Sioux City area consists of a broad loess-mantled upland till surface bisected by the valley of the Missouri River. Loess hills, along a belt one to two miles wide, adjacent to the flood plain have moderate to very steep slopes. River terraces that range in height from 25 to 80 feet above the flood plain of the Missouri River and its tributaries separate the valley floors from the uplands.

The surface geology of the Missouri River Basin is Pleistocene in age and consists of eolian (wind- blown) deposits of Peoria and Loveland loess. The loess formed in dune-shaped hills between major drainage ways. The Peoria loess typically consists of silty lean clays that are stiff when dry but become softer with increasing moisture content. The Peoria often exhibits low unit weight and is collapse susceptible. The Loveland loess is an older deposit, and typically consists of lean clays. The Loveland generally exhibits higher unit weights and shear strengths than the Peoria.

The loess overlies Pleistocene glacial deposits of Kansan till. The till consists of lean to fat clays mixed with sand, gravel, and occasional cobbles. The glacial deposits are generally fairly deep, but are sometimes near the surface at lower elevations on steep slopes. Cretaceous limestone and shale form the bedrock unit below the glacial deposits. The depth to bedrock is approximately 50 to greater than 100 feet within the general vicinity of the project site.

The project site is located near the boundary of the floodplain of the Missouri River, the Floyd River, and the loess hills. Along drainage ways, alluvial and colluvial deposits are typically present. These soils were formed by erosion of the adjoining loess-mantled hills. Alluvial deposits are generally present along creeks and in major drainage ways. The upper several feet of alluvium are usually stiffer due to the effects of desiccation. Colluvial soils are usually located at the base of steep slopes and in upland draws, and are formed by local creep and sloughing.

The site lithology consists of alluvium, generally overlain by fill material. Fill material encountered on- site consisted of lean clay, silty sand, and gravel described as shades of gray or brown, dry to moist, soft to very hard for fines and loose medium dense for sands, containing rubble and debris consisting of concrete, ash, cinders, wood, paper, and glass. Fill material ranged from 1-25 feet in thickness. Boring B-13E has an unusually thick layer of fill material with debris (wood, glass, and paper) consistent with landfill material. Surface soils at borings B-2E through B-6E and B-22E generally consisted of historical debris generated as part of railroad activities with varying amounts of ash/cinders. Significant shallow rubble consisting what appeared to be poorly to well hydrated concrete and/or lime was encountered at borings B-8E, B-11E, and B-24E. Alluvium was encountered beneath the fill material. Alluvium consisted of various shades of gray and brown, moist to wet, soft to dense, silty sand, occasionally lean

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 9 clay, mottled, and occasionally exhibited a moderate organic odor. The alluvium was present to depths ranging from 1 to 43.5 feet bgs.

Petroleum impacted soils are typically described as discolored olive gray to black, having a noticeable petroleum odor, and yield elevated field screening concentrations when analyzed with a PID. Using these criteria, soils adversely impacted by petroleum hydrocarbons were encountered on-site in B-13E. The boring logs in the Appendix, further describe the lithologic materials encountered within each on- site boring.

4.2 SOIL ANALYSIS RESULTS Field screening samples were collected at approximately five-foot vertical intervals in each boring advanced during investigation activities. All soil samples collected during this investigation were described by a geologist. The samples were field screened at one-foot intervals with the photoionization detector. Selected soil samples with the concentration from each boring were submitted for select COCs analysis. Table 3, below, summarizes the field screening concentrations identified within the soil samples collected from the soil borings. Copies of the boring logs are in the Appendix.

TABLE3, RESULTS OF SOIL HEADSPACE ANALYSIS Maximum Concentration Sample Location Depth (ft bgs) (Relative Response Units) B-2E 0.0 NA B-3E 0.8 0-2 B-4E 0.0 NA B-5E 0.0 NA B-6E 0.0 NA B-8E 0.0 NA B-9E 0.2 2.5-3.5 B-11E 0.9 3-4 B-13E 4.8 12-13 B-14E 0.3 5-6 B-17E 0.0 NA B-19E 0.0 NA B-20E 0.0 NA B-22E 0.1 1-2 B-24E 0.0 NA ft bgs = feet below ground surface NA = Not Applicable Relative Response Units (RRUs) are reported in parts per million (ppm)

The highest field screening concentration obtained from a soil sample during this investigation was 4.8 RRUs at B-13E from 12-13 feet bgs. Typically, field samples slightly to moderately impacted by volatile and semi-volatile compounds exhibit field screening concentrations with an order of magnitude of 10-100 RRUs.

The reports of analysis received from Test America for soil sample analysis are summarized in Table 4 located on pages 10-13. Reports of analysis are in the Appendix.

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TABLE 4, RESULTS OF SOIL ANALYSIS Iowa Statewide Sample Laboratory Method Constituent Identified Result Standard for Soil ID# Utilized (mg/kg) (Above Laboratory Reporting Limits) (mg/kg) Acetone 0.621 68,000 2-Butanone (MEK) 0.338 46,000 8260C (VOCs) Toluene 0.195 6,100 1,2,4-Trimethylbenzene 0.114 3,800 Total Xylenes 0.361 15,000 8270D (SVOCs) None Detected -- -- Antimony 60.8 31 Arsenic 10.4 17 B-2E Chromium 7.95 210* (0-1.5’) 6010C, 7010, 7471 Copper 75.7 15,000 (Priority Pollutant Metals) Lead 484 400 Mercury 0.0706 23 Nickel 10.2 1,500 Zinc 39.5 23,000 OA-2 TEH as Waste Oil 486 9,400 (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- 8270D (SVOCs) None Detected -- -- Antimony 1,450 31 Arsenic 21.6 17 Chromium 14.0 210* 6010C, 7010, 7471 Copper 1,970 15,000 (Priority Pollutant Metals) Lead 21,900 400 B-3E Mercury 0.0343 23 (0-1’) Nickel 23.6 1,500 Zinc 499 23,000 OA-2 TEH as Waste Oil 832 9,400 (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- B-3E 8260C (VOCs) None Detected -- -- (1-2’) 8260C (VOCs) None Detected -- -- 8270D (SVOCs) None Detected -- -- Antimony 9.59 31 Arsenic 10.0 17 Beryllium 0.521 110 Chromium 15.0 210* 6010C, 7010, 7471 Copper 29.2 15,000 B-4E (Priority Pollutant Metals) (0-1’) Lead 86.1 400 Mercury 0.0362 23 Nickel 21.3 1,500 Zinc 70.0 23,000 OA-2 None Detected -- -- (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- 8260C (VOCs) None Detected -- -- 8270D (SVOCs) None Detected -- -- B-5E Arsenic 10.9 17 (0.5-3’) 6010C, 7010, 7471 Chromium 16.5 210* (Priority Pollutant Metals) Copper 17.7 15,000

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Iowa Statewide Sample Laboratory Method Constituent Identified Result Standard for Soil ID# Utilized (mg/kg) (Above Laboratory Reporting Limits) (mg/kg) Lead 11.7 400 Mercury 0.0223 23 Nickel 25.9 1,500 Zinc 63.0 23,000 OA-2 TEH as Waste Oil 90.3 9,400 (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- 8260C (VOCs) None Detected -- -- 8270D (SVOCs) None Detected -- -- Arsenic 18.2 17 Chromium 25.6 210* Copper 103 15,000 6010C, 7010, 7471 Lead 361 400 B-6E (Priority Pollutant Metals) Mercury 0.474 23 (0-1.4’) Nickel 19.6 1,500 Zinc 391 23,000 OA-2 TEH as Waste Oil 762 9,400 (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- 8270D (SVOCs) None Detected -- -- Chromium 40.5 210* 6010C, 7010, 7471 Copper 9.46 15,000 (Priority Pollutant Metals) B-8E Zinc 54.1 23,000 (0.5-5’) OA-2 None Detected -- -- (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- B-8E 8260C (VOCs) Acetone 0.238 68,000 (6-7.5’) B-9E 8260C (VOCs) Acetone 0.488 68,000 (2.5-3.5’) 8270D (SVOCs) None Detected -- -- Arsenic 7.45 17 Chromium 23.2 210* Copper 26.5 15,000 6010C, 7010, 7471 Lead 53.1 400 (Priority Pollutant Metals) B-9E Mercury 0.0720 23 (7.5-9’) Nickel 21.1 1,500 Zinc 136 23,000 OA-2 None Detected -- -- (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- 8270D (SVOCs) None Detected -- -- Chromium 16.6 210* Copper 21.7 15,000 6010C, 7010, 7471 Lead 47.1 400 B-11E (Priority Pollutant Metals) Mercury 0.0658 23 (0-1.5’) Nickel 17.8 1,500 Zinc 122 23,000 OA-2 None Detected -- -- (Petroleum Fractions) 8081 (Pesticides) None Detected -- --

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Iowa Statewide Sample Laboratory Method Constituent Identified Result Standard for Soil ID# Utilized (mg/kg) (Above Laboratory Reporting Limits) (mg/kg) 8082A (PCBs) None Detected -- -- B-11E 8260C (VOCs) None Detected -- -- (3-4’) 8260C (VOCs) Acetone 0.210 68,000 8270D (SVOCs) None Detected -- -- Arsenic 6.19 17 Chromium 17.6 210* 6010C, 7010, 7471 Copper 19.6 15,000 B-13E (Priority Pollutant Metals) Lead 31.3 400 (10-13’) Nickel 18.0 1,500 Zinc 115 23,000 OA-2 Waste Oil 1,020 9,400 (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) PCB-1242 0.549 1.1 8260C (VOCs) None Detected -- -- 8270D (SVOCs) None Detected -- -- Arsenic 7.16 17 Chromium 17.3 210* Copper 17.9 15,000 6010C, 7010, 7471 Lead 11.7 400 B-14E (Priority Pollutant Metals) Mercury 0.0353 23 (5-7’) Nickel 22.0 1,500 Zinc 71.6 23,000 OA-2 None Detected -- -- (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- 8260C (VOCs) None Detected -- -- 8270D (SVOCs) None Detected -- -- Arsenic 10.0 17 Chromium 19.2 210* Copper 22.0 15,000 6010C, 7010, 7471 Lead 216 400 B-17E (Priority Pollutant Metals) (0-4’) Mercury 0.0362 23 Nickel 25.4 1,500 Zinc 103 23,000 OA-2 TEH as Waste Oil 40.7 9,400 (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- 8260C (VOCs) None Detected -- -- 8270D (SVOCs) None Detected -- -- Arsenic 9.23 17 Beryllium 0.639 110 Chromium 21.8 210* 6010C, 7010, 7471 Copper 21.2 15,000 B-19E (Priority Pollutant Metals) (0-4’) Lead 33.9 400 Nickel 28.5 1,500 Zinc 82.5 23,000 OA-2 TEH as Waste Oil 204 9,400 (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- B-20E 8260C (VOCs) None Detected -- --

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Iowa Statewide Sample Laboratory Method Constituent Identified Result Standard for Soil ID# Utilized (mg/kg) (Above Laboratory Reporting Limits) (mg/kg) (0-4’) 8270D (SVOCs) None Detected -- -- Chromium 19.4 210* Copper 16.7 15,000 6010C, 7010, 7471 Lead 12.2 400 (Priority Pollutant Metals) Nickel 26.3 1,500 Zinc 70.7 23,000 OA-2 None Detected -- -- (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) None Detected -- -- 8260C (VOCs) None Detected -- -- 8270D (SVOCs) None Detected -- -- Chromium 13.4 210* Copper 11.5 15,000 6010C, 7010, 7471 Lead 26.7 400 B-22E (Priority Pollutant Metals) Mercury 0.0443 23 (1-2.5’) Nickel 15.0 1,500 Zinc 76.2 23,000 OA-2 TEH as Waste Oil 392 9,400 (Petroleum Fractions) 8081 (Pesticides) None Detected -- -- 8082A (PCBs) PCB-1254 0.0693 1.1 µg/kg = parts per billion (ppb) mg/kg = parts per million (ppm) TEH = Total Extractable Hydrocarbons Constituent concentrations in bold print exceed the State of Iowa standard. *The method used to analyze for Chromium did not differentiate between trivalent and hexavalent Chromium. Due to this the more stringent regulatory standard, 210 mg/kg for hexavalent Chromium, was used.

The results of the analytical testing conducted on the submitted soil samples identified concentrations of VOCs, petroleum hydrocarbons, PCBs, and/or metals above laboratory detection limits within soil samples analyzed from the respective borings. The VOCs and petroleum hydrocarbons identified at these locations appeared to be associated with degraded gasoline, and petroleum hydrocarbon based lubricants/motor oil/waste oils. Based upon field observations, metals concentrations, with exception to antimony and lead concentrations within sample B-2E, antimony, arsenic, and lead concentrations within sample B-3E, and arsenic concentrations in B-6E appeared to be consistent with naturally occurring background concentrations typically observed within glacial deposits and derived sediments within Iowa. Polychlorinated biphenyls (PCB) were identified above laboratory reporting limits within samples B-13E (10-13’) and B-22E (1-2.5’). Pesticides were not identified above laboratory reporting limits within the samples. The results of the analytical testing conducted on the submitted soil samples are summarized within Table 4, located on pages 10 through 13. Laboratory reports of analysis are in the Appendix.

VOCs, SVOCs, metals, TEH, pesticides, and PCBs concentrations identified within the soil samples were compared to Iowa statewide standards for soil listed within Chapter 137 of Iowa Administrative

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 14

Code 567 (Iowa Land Recycling Program). Although the standards are not an all-encompassing maximum contaminant level for various environmental exposure pathways (e.g. ingestion, dermal contact, inhalation, leaching to ground water, etc.), they are a method for gauging environmental conditions on the site.

The following constituents were identified at the following sampling locations above the Statewide Standards for soil:

Arsenic: B-3E, B-6E Antimony: B-2E, B-3E Lead: B-2E, B-3E

Acetone and/or 2-butanone (MEK) were identified at low concentrations within samples B-2E, B-8E, B-9E, and B-13E. These constituents were not considered constituents of concern because they are common laboratory contaminants and several orders of magnitude below the Iowa Statewide Standards.

Following receipt of the laboratory report of analysis, toxicity characteristic leaching procedure (TCLP) analysis was requested for two samples on the railyard with the highest metals concentrations (B-2E and B-3E) and one additional sample off the railyard with the highest metals concentrations (B-17E). Results of analysis indicated leachable concentrations of barium and/or lead within the samples. With exception to the lead concentration within sample B-2E, results of the analysis indicated leachable metals concentrations were below TCLP limits within the samples. Laboratory results indicated the leachable lead concentration (9.41 mg/L) within sample B-2E was above TCLP limit of 5 mg/L. The material from B-2E is considered a “characteristic hazardous waste”. Results of analysis included within the Appendix and are summarized in Table 5 below.

TABLE 5, RESULTS OF TOXICITY CHARACTERISTIC LEACHING PROCEDURE

Laboratory Method Constituent Identified Concentration TCLP Limit Sample ID# Utilized (Above Reporting Limits) (mg/L) (mg/L) B-2E Barium 0.815 100 6010/7010/7471B (TCLP) (0-1.5’) Lead 9.41 5 B-3E Barium 0.616 100 6010/7010/7471B (TCLP) (0-1’) Lead 0.142 5 B-17E 6010/7010/7471B (TCLP) Barium 1.09 100 (0-4’) TCLP = Toxicity Characteristic Leaching Procedure Constituent concentrations in bold print exceed the Maximum Concentration for the Toxicity Characteristic.

No other contaminants of concern were identified within these soil samples at concentrations above statewide standards.

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 15

4.3 GROUND WATER ANALYSIS RESULTS The results of the analytical testing conducted on the submitted ground water samples identified concentrations of petroleum hydrocarbon constituents, VOCs, SVOCs, and/or metals above laboratory detection limits within the samples from six wells. Ground water samples were not collected from temporary wells at B-3E and B-6E because the wells did not yield sufficient ground water to submit the volume of water required for analysis. The waste oil fraction benzene appeared to be residual petroleum hydrocarbon constituents. The SVOC, bis(2-ethylhexyl) phthalate, is a common plasticizer used in the production of PVC. Bis(2-ethylhexyl) phthalate is also a common laboratory contaminant. Metals observed within the ground water were generally consistent with metals observed within surface soils across the site and historical industrial areas. The results of the analytical testing conducted on the submitted ground water samples are summarized within Table 6, on pages 17-18.

Chapter 137 of the Iowa DNR voluntary cleanup rules prescribes statewide standards (SWSs) for groundwater. Two classes of statewide groundwater standards are prescribed: protected groundwater sources and non-protected groundwater sources. The two classes are distinguished by the hydraulic conductivity (K) of the aquifer and the naturally occurring total dissolved solids (TDS) content. In simple terms, groundwater in a useable aquifer (K ≥ 0.44 m/day, TDS < 2,500 mg/L) has a higher level of protection than groundwater that is not likely to be used (K ≤ 0.44 m/day, TDS > 2,500 mg/L). Based on the type of soil encountered during this investigation (primarily lean clay overlying sands) and TG’s past experience in this area, the hydraulic conductivity in these on-site materials would likely be classified Protected Ground Water.

A water supply well search was completed on the IDNR facility explorer website at the time of the report. No water supply wells were identified within a 1,000-foot radius of ground water sample locations exceeding statewide groundwater standards. The nearest water supply well within the anticipated down-gradient to cross-gradient direction of the areas of concern was identified on the Cargill site near 11th & Clark Streets, at least 2,200 feet south/southeast of the areas of concern. Several active and decommissioned monitoring wells were identified on City of Sioux City and Canadian Pacific Railroad properties within the general vicinity of the sample locations of concern, but monitoring wells are not considered a concern when assessing water quality concerns. Furthermore, the City of Sioux City currently has an ordinance in place restricting installation of water supply wells within city limits. Therefore, the ground water ingestion pathway is not considered a significant concern at this site.

The State of Iowa also establishes water quality criteria for surface water bodies. Water quality criteria referenced for this project was for the segment of the Floyd River at Sioux City. Based upon the proposed construction methodology, the need for dewatering on the viaduct project is not anticipated. These criteria were included for comparison to contaminant concentrations within the ground water samples should dewatering discharge via surface drainage to the Floyd River be deemed necessary for construction activities.

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 16

The following constituents were identified at the following sampling locations above Iowa Protected Ground Water standards:

Arsenic: B-13E Benzene: B-13E Cadmium: B-2E Lead: B-2E, B-4E Nickel: B-5E Mercury: B-5E TEH as Waste Oil: B-13E

The following constituents were identified at the following sampling locations above Iowa Non- Protected Ground Water standards:

Benzene: B-13E Lead: B-2E

The following constituents were identified at the following sampling locations above Iowa Surface Water Criteria standards:

Lead: B-2E, B-4E Mercury: B-5E Selenium: B-2E, B-4E, B-5E

Bis(2-ethylhexyl) phthalate was identified at low concentrations within samples B-5E, B-8E, and B- 13E. This constituent is a common laboratory contaminant and was not considered to be a constituent of concern at this site.

No other contaminants of concern were identified within these ground water samples at concentrations above the respective Iowa regulatory standards reviewed.

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 17

TABLE 6, RESULTS OF GROUND WATER ANALYSIS

Iowa Iowa Iowa Specific Statewide Statewide Water Constituent Standard - Standard - Quality Well Laboratory Method Identified Result Non- Protected Criteria - ID# Utilized Protected (Above Detection (µg/L) Ground Surface Ground Limits) Water Water† Water (µg/L) (µg/L) (µg/L) 8260 (VOCs) None Detected ------8270 (SVOCs) None Detected ------Antimony (Total) 1.08 6.0 30 640 Arsenic (Total) 8.80 10 50 50 Cadmium (Total) 2.43 5.0 N/A 168 6020A & 7470A Chromium (Total) 25.0 100 500 3,365 (Priority Pollutant Copper (Total) 95.4 1,300 6,600 1,000 B-2E Metals) Lead (Total) 99.0 15 75 7.7 Nickel (Total) 32.1 100 700 4,600 Selenium (Total) 6.99 50 250 5 Zinc (Total) 39.0 2,000 10,000 215 OA-2 None Detected ------(Petroleum Fractions) 8081B (Pesticides) None Detected ------8082A (PCBs) None Detected ------8260 (VOCs) None Detected ------8270 (SVOCs) None Detected ------Arsenic (Total) 7.90 10 50 50 Cadmium (Total) 6.22 5 N/A 168 Chromium (Total) 28.2 100 500 3,365 6020A & 7470A Copper (Total) 28.5 1,300 6,600 1,000 (Priority Pollutant Lead (Total) 37.0 15 75 7.7 B-4E Metals) Mercury (Total) 0.644 2.0 10 0.9 Nickel (Total) 53.0 100 700 4,600 Selenium (Total) 14.6 50 250 5 Zinc (Total) 35.7 2,000 10,000 215 OA-2 (Petroleum None Detected ------Fractions) 8081B (Pesticides) None Detected ------8082A (PCBs) None Detected ------8260 (VOCs) None Detected ------Bis(2-ethylhexyl) 8270 (SVOCs) 13.2 6 250 N.L phthalate Arsenic (Total) 3.24 10 50 50 Cadmium (Total) 7.66 5.0 N/A 168 Chromium (Total) 17.1 100 500 3,365 6020A & 7470A Copper (Total) 22.8 1,300 6,600 1,000 (Priority Pollutant Lead (Total) 1.41 15 75 7.7 B-5E Metals) Mercury (Total) 4.22 2.0 10 0.9 Nickel (Total) 208 100 700 4,600 Selenium (Total) 9.24 50 250 5 Zinc (Total) 51.9 2,000 10,000 215 OA-2 None Detected ------(Petroleum Fractions) 8081B (Pesticides) None Detected ------8082A (PCBs) None Detected ------

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 18

Iowa Iowa Iowa Specific Statewide Statewide Water Constituent Standard - Standard - Quality Well Laboratory Method Identified Result Non- Protected Criteria - ID# Utilized Protected (Above Detection (µg/L) Ground Surface Ground Limits) Water Water† Water (µg/L) (µg/L) (µg/L) 8260 (VOCs) None Detected ------Bis(2-ethylhexyl) 8270 (SVOCs) 11.2 6.0 250 N.L. phthalate Arsenic (Total) 7.64 10 50 50 Chromium (Total) 7.57 100 500 3,365 6020A & 7470A Copper (Total) 3.87 1,300 6,600 1,000 (Priority Pollutant B-8E Lead (Total) 3.56 15 75 7.7 Metals) Nickel (Total) 9.76 100 700 4,600 Zinc (Total) 13.3 2,000 10,000 215 OA-2 None Detected ------(Petroleum Fractions) 8081B (Pesticides) None Detected ------8082A (PCBs) None Detected ------8260 (VOCs) None Detected ------8270 (SVOCs) None Detected ------6020A & 7470A Arsenic (Total) 3.43 10 50 50 (Priority Pollutant Lead (Total) 1.45 15 75 7.7 B-9E Metals) Nickel (Total) 15.1 100 700 4,600 OA-2 None Detected ------(Petroleum Fractions) 8081B (Pesticides) None Detected ------8082A (PCBs) None Detected ------8260 (VOCs) Benzene 102 5.0 64 510 Bis(2-ethylhexyl) 8270 (SVOCs) 13.2 6.0 250 N.L. phthalate Antimony (Total) 1.6 6.0 30 640 Arsenic (Total) 10.1 10 50 50 6020A & 7470A Chromium (Total) 8.41 100 500 3,365 (Priority Pollutant Copper (Total) 3.73 1,300 6,600 16.9 B-13E Metals) Lead (Total) 6.27 15 75 7.7 Nickel (Total) 22.4 100 700 4,600 Zinc (Total) 24.1 2,000 10,000 215 OA-2 TEH as Waste Oil 1,550 730 15,000 40,000** (Petroleum Fractions) 8081B (Pesticides) None Detected ------8082A (PCBs) None Detected ------†The most stringent surface water quality criteria for respective Use Designations for the section of the Floyd River from Mouth (Woodbury Co.) to confluence with W. Br. Floyd R.(Plymouth Co.) were referenced. ** Tier 1 Risk-Based Screening level (RSBL) for ground water to the surface water pathway from Iowa Department of Natural Resources (IDNR) Leaking Underground Storage Tanks (LUST) Assessment guidance. µg/L = parts per billion (ppb) mg/L = parts per million (ppm) N.L. = Not listed TEH = Total Extractable Hydrocarbons Concentrations in bold exceed the LRP Statewide Standard and/or Specific Water Quality Criteria for the constituent.

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5.0 CONCLUSIONS AND RECOMMENDATIONS

Based upon the results of this Phase II Environmental Site Assessment, Thiele Geotech, Inc. makes the following conclusions/recommendations regarding the assessment site:

5.1 CONCLUSIONS

1) The results of the analytical testing conducted on the submitted soil samples identified concentrations of VOCs, petroleum hydrocarbons, PCBs, and/or metals above laboratory detection limits within soil samples analyzed from the respective borings. The VOCs and petroleum hydrocarbons identified at these locations appeared to be associated with degraded gasoline, and petroleum hydrocarbon based lubricants/motor oil/waste oils. Based upon field observations, metals concentrations, with exception to antimony and lead concentrations within sample B-2E, antimony, arsenic, and lead concentrations within sample B-3E, and arsenic concentrations in B-6E appeared to be consistent with naturally occurring background concentrations typically observed within glacial deposits and derived sediments within Iowa. Polychlorinated biphenyls (PCB) were identified above laboratory reporting limits but below statewide standards within samples B-13E (10-13’) and B-22E (1-2.5’). SVOCs and pesticides were not identified above laboratory reporting limits within the samples. Identified contaminants of concern within the samples collected at the site were compared to Iowa Land Recycling Program guidelines.

a. Two soil samples from locations B-3E and B-6E exceeded the statewide standard for arsenic in soil (17 mg/kg). The highest concentration of arsenic was 21.6 mg/kg (B- 3E). Two soil samples from locations B-2E and B-3E exceeded the statewide standard for antimony (31 mg/kg). The highest concentration of antimony was 1,450 mg/kg (B- 3E). Two soil samples from locations B-2E and B-3E exceeded the statewide standard for lead (400 mg/kg). The highest concentration of lead was 21,900 mg/kg (B-3E). No other contaminants of concern were identified within these soil samples at concentrations above statewide standards.

b. Following receipt of the laboratory report of analysis, toxicity characteristic leaching procedure (TCLP) analysis was requested for two samples on the railyard with the highest metals concentrations (B-2E and B-3E) and one additional sample off the railyard with the highest metals concentrations (B-17E). Results of analysis indicated leachable concentrations of barium and/or lead within the samples. With exception to the lead concentration within sample B-2E, results of the analysis indicated leachable metals concentrations were below TCLP limits within the samples. Laboratory results indicated the leachable lead concentration (9.41 mg/L) within sample B-2E was above

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TCLP limit of 5 mg/L. The material from B-2E is considered a “characteristic hazardous waste”.

2) The results of the analytical testing conducted on the submitted ground water samples identified concentrations of petroleum hydrocarbon constituents, VOCs, SVOCs, and/or metals above laboratory detection limits within the samples from six sample locations. Ground water samples were not collected from temporary wells at B-3E and B-6E because the wells did not yield sufficient ground water to submit the volume of water required for analysis. The waste oil fraction and benzene appeared to be residual petroleum hydrocarbon constituents. The SVOC, bis(2-ethylhexyl) phthalate, is a common plasticizer used in the production of PVC. Bis(2- ethylhexyl) phthalate is also a common laboratory contaminant. Metals observed within the ground water were generally consistent with metals observed within respective borings. Identified contaminants of concern within the samples collected at the site were compared to Iowa Land Recycling Program and Surface Water Quality standards.

a. Arsenic, benzene, cadmium, lead, nickel, mercury, and/or TEH as waste oil concentrations exceeded Iowa Statewide Standards for Protected Ground Water at sample locations B-2E, B-4E, B-5E, and B-13E.

b. Lead and benzene concentrations exceeded Iowa Statewide Standards for Non- Protected Ground Water at sample locations B-2E and B-13E, respectively.

c. Lead, mercury, and/or selenium concentrations exceeded respective Iowa Surface Water Criteria standards at sample locations B-2E, B-4E, and B-5E.

5.2 RECOMMENDATIONS It is understood construction activities associated with the viaduct, surface pavements, and sewers are planned for the project site. There appears to be the potential for exposure to soil and ground water exceeding regulatory limits to occur during construction of the two projects. Generally, these areas include shallow soils and ground water within the area of the railroad properties with metals exceeding regulatory limits and ground water within the area of the city maintenance facility exceeding regulatory limits for water.

Based upon proposed construction activities, it is recommended worker safety and material handling/disposal plans for this project address environmental concerns associated with constituents of concern exceeding respective regulatory action levels as they relate to proposed activities.

Worker safety concerns include, but are not limited to, ingestion and inhalation pathways. Proper sanitation and engineering controls should be practiced and implemented when working within the impacted areas. An example of proper sanitation would include washing hands and face before ingesting

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Page 21 food or water and before smoking or tobacco chewing. An example of proper engineering control would include dust suppression and/or dust masks when dry dusty conditions are present.

Materials management is warranted for this site. A Materials Management Recommendations Report (MMRR) should be created for the 18th Street Viaduct project and a separate one for the Storm Sewer Project. The MMRR should identify the recommended procedures, means, and methods for the following activities. These activities include:

• Collect additional shallow (0-18 inches below ground surface) soil samples within the area of sample locations B-2E and B-3E by means of grid sampling in order to delineate soil conditions with antimony and lead exceeding statewide standards and lead exceeding TCLP limits. It is important to note several rail spurs and pavement lie within the area of concern. An aggressive means of soil sampling will likely be required to collect the shallow samples within ballast and other granular material around and below these obstructions. An applicable and productive means of sampling this type of landscape is typically drilling by standard penetration testing or direct push methods.

Impacted soils excavated from within the project site would need to be segregated and managed on site prior to receipt of laboratory analysis report(s) and determination of disposal methods. Following receipt of the lab results for the sampling described above, the contractor would need to refer to the MMRR for recommended procedures, means, and methods for handling the material. For instance, the impacted soil would be re-tested using the Toxicity Characteristic Leaching Procedure (TCLP) analysis and/or other appropriate analytical method(s) in order to classify, determine appropriate management, and proper disposal of the material. The soil must be managed accordingly and properly disposed of, particularly in the event design modifications result in impacted soil being removed from the project area. Then proper action requires management of the soil as a waste material.

It is also recommended the findings of this investigation be forwarded to the appropriate landowner entities for review and action.

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6.0 LIMITATIONS

Soil and ground water samples were collected at the discrete locations indicated on the Boring Location Plan and were analyzed for select parameters only. The data obtained may not be representative of other locations on the site. Also, note conditions may change over time. Consequently, Thiele Geotech, Inc. does not guarantee or warrant the environmental condition of the property.

This study is not intended to meet the requirements of a "Phase I" ESA or a Risk Based Corrective Action Tier 1 Assessment. This study also did not include identification or evaluation of asbestos, radon, methane gas, or sampling or testing of soil or ground water for constituents other than those listed within the Report.

Our conclusions regarding the assessment site are based upon observations of existing site conditions, our interpretation of site history and site usage information and the results of a limited subsurface exploration, sample screening and chemical testing program. The results of this study must be qualified by the fact that only limited borings, soil and ground water sampling and chemical testing have been conducted at the site. The concentrations of contaminants measured may change at any particular location as a function of time in response to natural conditions, chemical reactions and other events. Therefore, conclusions regarding the condition of the site do not represent a warranty that all areas within the site and beneath structures are of the same environmental quality as those sampled. Further, contamination could also exist in forms not indicated by the limited investigation conducted. If additional information becomes available regarding this site, such information should be provided to Thiele Geotech, Inc. so that our conclusions and recommendations may be reviewed and modified as necessary.

This report is based on the current regulatory environment, current regulations, and guidance. Regulatory agency interpretations, future regulatory changes, and/or policy or guidance changes may affect the environmental status of the site.

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7.0 CERTIFICATION AND SIGNATURE

I certify that this document was prepared by me or under my direct personal supervision and that I am a Certified Groundwater Professional as certified by the Iowa Department of Natural Resources.

Respectfully submitted, Thiele Geotech, Inc.

Prepared by,

Robert T. Miller, C.G.P. Senior Geologist

THIELE GEOTECH, INC Phase II Environmental Site Assessment February 15, 2016 TG# 15428.01 Appendix

APPENDIX

Boring Location Plans Site Vicinity Map Topographic Map Parcel Map Legend of Terms Boring Logs

Reports of Analysis

THIELE GEOTECH, INC

SITE

Topographic Map

(From 2015 Sioux City North, Iowa USGS Quadrangle) Project 18th Street Viaduct 18th St. & Floyd Blvd., Sioux City, IA

Job # Date 15428.01 1/22/16 SITE

Parcel Map

(2015 Woodbury County Assessor/2014 Photograph) Project 18th Street Viaduct 18th St. & Floyd Blvd., Sioux City, IA

Job # Date 15428.01 1/22/16 LEGEND OF TERMS Soil Description Terms Consistency - Fine Grained Consistency - Coarse Grained Moisture Conditions Very Soft, Soft, Firm, Very Loose, Loose, Medium Dry, Slightly Moist, Moist Hard, Very Hard Dense, Dense, Very Dense Very Moist, Wet (Saturated) Sample Identification Sample Type Sample Data Laboratory Data U -- Undisturbed (Shelby Tube) No. -- Number MC -- Moisture content S -- Split Spoon (disturbed) SPT -- Standard penetration test γd -- Dry unit weight C -- Continuous sample (disturbed) /ft. -- blows per foot qu -- Unconfined compression A -- Auger cuttings (disturbed) Rec -- Recovery LL/PI -- Liquid limit & plasticity index Unified Soil Classification System Peat Pt Highly organic soils Fat Clay CH Clay - Liquid Limit > 50 * 50% or more Elastic Silt MH Silt - Liquid Limit > 50 * smaller than Lean Clay CL Clay - Liquid Limit < 50 * No. 200 sieve Silt ML Silt - Liquid Limit < 50 * Silty Clay CL-ML Silty Clay * Clayey Sand SC Sands with 12 to 50 percent Silty Sand SM smaller than No. 200 sieve * Poorly-Graded Sand with Clay SP-SC More than 50% Poorly-Graded Sand with Silt SP-SM Sands with 5 to 12 percent larger than Well-Graded Sand with Clay ** SW-SC smaller than No. 200 Sieve * No. 200 sieve and Well-Graded Sand with Silt ** SW-SM % sand > % Gravel Poorly-Graded Sand SP Sands with less than 5 percent Well-Graded Sand ** SW smaller than No. 200 sieve * Clayey Gravel GC Gravels with 12 to 50 percent Silty Gravel GM smaller than No. 200 Sieve * Poorly-Graded Gravel with Clay GP-GC More than 50% Poorly-Graded Gravel with Silt GP-GM Gravels with 5 to 12 percent larger than Well-Graded Gravel with Clay ** GW-GC smaller than No. 200 sieve * No. 200 sieve and Well-Graded Gravel with Silt ** GW-GM % gravel > % sand Poorly-Graded Gravel GP Gravels with less than 5 percent Well-Graded Gravel ** GW smaller than No. 200 sieve * * See Plasticity Chart for definition of silts and clays ** See Criteria for Sands and Gravels for definition of well-graded Plasticity Chart 60 P l a 50 CH or OH s t i 40 c i t 30 y MH or OH

I 20 CL or OL n d e 10 x CL-ML ML

0 10 20 30 40 50 60 70 80 90 100 L i q u i d L i m i t Criteria for Sands and Gravels Coarse Fine Coarse Medium Fine FINES Boulders Cobbles Gravel Gravel Sand Sand Sand (silt or clay) Sieve size 10" 3" ¾" #4 #10 #40 #200 2 Well-graded sands (SW) Cu=D60/D10≥6 and Cc=(D30) /(D10 x D60) ≤3 and ≥1 2 Well-graded gravels (GW) Cu=D60/D10≥4 and Cc=(D30) /(D10 x D60) ≤3 and ≥1 BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15 End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO. 11/5/15 31.9’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-2E LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH w/n 10’ feet of pin see Boring Location Plan gravel 1108.74’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU) dark gray moist loose silty sand fill silty fine to coarse sand, 10-20% ash/ 0.0 cinders light moist firm silt alluvium low plasticity, 0.0 brown silt, fragile C-1 32 0.0

Slightly NR moist 5 NR 5

0.0

low plasticity, 0.0 silt, fragile low plasticity, C-2 53 0.0

0.0

10 0.0 10

0.0

low plasticity, 0.0 silt, fragile low plasticity, C-3 52 0.0

0.0 moist 15 0.0 15

0.0

low plasticity, 0.0 silt, fragile low plasticity, C-4 55 0.0

0.0

20 0.0 20

0.0

low plasticity, 0.0 silt, fragile low plasticity, C-5 47 0.0

0.0

25 NR 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/5/15 31.9’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-2E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

w/n 10’ feet of pin see Boring Location Plan gravel 1108.74’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

light wet firm silt alluvium low plasticity,

brown silt 0.0

0.0

C-6 60 0.0

brown 0.0

30 0.0 30

0.0

0.0 low plasticity, silt C-7 60 0.0

lean 0.0 clay 35 0.0 35

0.0

0.0 low to moderate plasticity, silty clay C-8 60 0.0

soft 0.0

40 0.0 40 5-10% fine to coarse sand 0.0

0.0

C-9 60 0.0 yellowish dense silty sand silty fine to coarse brown sand, < 5% gravel 0.0

45 0.0 45 bottom of boring at 45’

temporary 1” PVC well set with 20’ of 0.010” slot screen from 22-42’

50 50

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/5/15 30.9’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-3E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ east of pin see Boring Location Plan gravel 1108.55’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

dark slightly loose silty sand fill silty fine to coarse

gray moist sand, 10-20% ash 0.0

light moist firm silt alluvium low plasticity, 0.8 brown silt, fragile C-1 39 0.0

0.0

5 NR 5

0.0

0.0

C-2 54 0.0

0.0

10 0.0 10

0.0

low plasticity, 0.0 silt, fragile C-3 51 0.0

0.0

15 0.0 15

0.0

low plasticity, 0.0 silt, fragile C-4 54 0.0

0.0

20 0.0 20

0.0

0.0

C-5 46 0.0

very 0.0 moist NR 25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/5/15 30.9’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-3E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ east of pin see Boring Location Plan gravel 1108.55’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

light very firm silt alluvium low plasticity,

brown moist silt, fragile 0.0

0.0

wet low plasticity, C-6 60 0.0 silt, fragile 0.0

30 0.0 30

0.0

0.0 low plasticity, sit C-7 60 0.0

0.0

35 0.0 35

0.0

0.0 low plasticity, silt C-8 60 0.0

brown 0.0

40 0.0 40 5-10% fine sand 0.0

0.0

clayey silty fine to C-9 60 0.0 coarse sand, dense silty < 5% gravel 0.0 sand 45 0.0 45 bottom of boring at 45’

temporary 1” PVC well set with 15’ of 0.010” slot screen from 25-40’

50 50

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/5/15 29.8’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-4E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ east of pin see Boring Location Plan gravel 1107.69’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

dark gray moist medium silty sand fill silty fine to coarse

dense sand, 5-10% ash 0.0 light moist firm silt alluvium low plasticity, silt, brown fragile 0.0

C-1 35 0.0 carbon and iron deposits NR

5 NR 5

0.0

0.0 low to moderate plasticity, silty clay, C-2 48 0.0 fragile soft 0.0

10 NR 10

0.0

0.0 low to moderate plasticity, silty clay, C-3 42 0.0 fragile 0.0 firm 15 NR 15

0.0

0.0

C-4 44 0.0

0.0

20 NR 20

0.0

0.0

C-5 50 0.0

very 0.0 moist 0.0 25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/5/15 29.8’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-4E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ east of pin see Boring Location Plan gravel 1107.69’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

light very firm silt alluvium low plasticity, silt

brown moist 0.0

0.0 carbon and iron deposits C-6 60 0.0

0.0

30 0.0 30

0.0

0.0 low plasticity, silt C-7 60 0.0

0.0

35 0.0 35

0.0

0.0 low plasticity, silt C-8 60 0.0

0.0

40 0.0 40 wet 10-20% fine to coarse sand 0.0

0.0

clayey silty fine to C-9 60 0.0 coarse sand with yellowish medium silty sand < 5% gravel 0.0 brown dense 45 0.0 45 bottom of boring at 45’

temporary 1” PVC well set with 20’ of 0.010” slot screen from 20-40’

50 50

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/5/15 28.9’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-5E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ southwest of pin see Boring Location Plan gravel 1107.27’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

dark gray dry medium silty fill fine to coarse sand

dense sand w/ 10-20% gravel 0.0 < 5% ash/cinders 0.0

C-1 36 0.0

brown moist soft silt alluvium low plasticity, silt, NR fragile 5 NR 5

0.0

low plasticity, silt, 0.0 fragile C-2 40 0.0

0.0

10 NR 10

0.0 less fragile, cohesive, 0.0 iron oxide C-3 31 0.0

firm NR

15 NR 15

less fragile, 0.0 cohesive carbon and iron 0.0 deposits C-4 39 0.0

0.0

20 NR 20

0.0

carbon and iron 0.0 deposits C-5 52 0.0

very 0.0 moist 0.0 25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/5/15 28.9’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-5E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ southwest of pin see Boring Location Plan gravel 1107.27’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

brown wet firm silt alluvium low plasticity

0.0

0.0

low plasticity C-6 60 0.0

0.0

30 0.0 30

gray mottling 0.0

0.0

C-7 60 0.0

0.0

35 0.0 35

0.0

0.0

C-8 60 0.0

0.0 gray medium clayey clayey fine to 40 dense sand sand with 5-10% 0.0 40 gravel 0.0

0.0

C-9 60 0.0

dense silty 0.0 sand 45 0.0 45 bottom of boring at 45’

temporary 1” PVC well set with 15’ of 0.010” slot screen from 20-35’

50 50

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15

End of Drilling 21’ LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/5/15 24.3’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-6E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ north of pin see Boring Location Plan gravel 1107.34’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

dark slightly firm silty fill silty sand w 5-10%

gray moist sand gravel, 10-20% 0.0 ash/cinders 0.0

C-1 46 0.0

brown moist soft silt alluvium low plasticity, 0.0 silt, fragile 5 NR 5

0.0

0.0

C-2 42 0.0

0.0

10 NR 10

0.0

0.0 low plasticity, silt, fragile C-3 48 0.0

very firm 0.0 moist 15 NR 15 less fragile, cohesive 0.0

0.0

C-4 45 0.0

soft 0.0

20 NR 20

0.0

0.0

C-5 47 0.0

0.0

25 gray NR 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/4/15

End of Drilling 21’ LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/5/15 24.3’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-6E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ north of pin see Boring Location Plan gravel 1107.34’ 45’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

gray very soft silt alluvium low plasticity,

moist silt, fragile 0.0

0.0

olive shell fragments C-6 44 0.0 gray 0.0

30 NR 30

0.0

gray 0.0 orange mottling iron deposits C-7 57 0.0

firm 0.0 lean 35 clay 0.0 35 olive gray 0.0

gray 0.0

C-8 52 0.0

0.0

40 yellowish wet medium silty 0.0 40 brown dense sand silty fine to coarse sand with < 5% 0.0 gravel 0.0

C-9 60 0.0

very 0.0 dense 45 0.0 45 bottom of boring at 45’

temporary 1” PVC well set with 20’ of 0.010” slot screen from 10-30’

50 50

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling 25.5’ LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/3/15 25.6’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-8E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ north of pin see Boring Location Plan grass 1103.59’ 35’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

brown very firm silt fill

moist 0.0 weathered light concrete 0.0 gray 15-20% sand and gravel C-1 50 0.0

hard fat 0.0 clay 5 NR 5

0.0 dark gray very soft silt alluvium low plasticity moist 0.1

C-2 30 0.0

NR

10 NR 10 gray- olive 0.0 gray 0.0

C-3 28 0.1

NR

15 NR 15 orangish iron deposits brown 0.0

0.0

orangish C-4 43 0.0 gray 0.0

20 NR 20

0.0 gray dark gray mottling, < 5% organics, 0.0 moderate to high plasticity C-5 50 0.0

lean 0.0 clay NR 25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling 25.5’ LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/3/15 25.6’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-8E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ north of pin see Boring Location Plan grass 1103.59’ 35’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

dark gray v. moist soft lean clay alluvium moderate plasticity

wet 0.0 loose silty sand silty fine to medium 0.0 grayish sand brown C-6 50 0.0

0.0 brown soft silt 30 NR 30 dark gray and olive gray mottling, 0.0 low to moderate plasticity 0.0 medium silty dense sand C-7 58 0.0

0.0 yellowish 35 brown 0.0 35 bottom of boring at 35’

temporary 1” PVC well set with 20’ of 0.010” slot screen from 12-32’

40 40

45 45

50 50

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling 25.5’ LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/3/15 25.3’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-9E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ south of pin see Boring Location Plan grass 1103.20’ 35’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

light moist very silt fill silty clay, low

brown hard plasticity 0.0

light soft clayey silt 0.0 gray slightly moist C-1 43 0.2

0.0

5 NR 5 loose silty sand silty fine to coarse sand with < 10% 0.0 gravel 0.0

< 5% ash/cinders C-2 46 0.0

dark gray very firm silt alluvium low plasticity 0.1 moist 10 NR 10

0.0

0.0

C-3 24 NR

gray to NR olive 15 gray NR 15 orange mottling iron deposits 0.0

0.0

C-4 34 0.0

NR

20 NR 20

orangish 0.0 brown gray to 0.0 olive shell fragments gray C-5 42 0.0

0.0

NR 25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling 25.5’ LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/3/15 25.3’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-9E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ south of pin see Boring Location Plan grass 1103.20’ 35’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

gray v. moist soft lean clay alluvium

brown wet loose silty sand silty fine sand 0.0

0.0

< 5% organics C-6 49 0.0

0.0 olive low to moderate 30 gray plasticity NR 30

0.0

0.0 orangish loose silty sand brown silty fine to medium C-7 58 0.0 sand 0.0

35 0.0 35 bottom of boring at 35’

temporary 1” PVC well set with 15’ of 0.010” slot screen from 16-31’

40 40

45 45

50 50

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling N/E 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

N/E=none encountered 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-11E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 15’ east of pin see Boring Location Plan grass 1102.59’ 5.5’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

light moist firm lean clay fill

brown 0.0

buff loose poorly 0.0 graded weathered sand concrete C-1 53 0.9

0.0

5 0.2 5 hard Refusal at 5.5’

10 10

15 15

20 20

25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/3/15 22.1’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-13E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ north of pin see Boring Location Plan gravel 1105.11’ 35’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

olive dry hard silt fill 5-10% sand and

gray gravel 0.0

0.0 low to moderate plasticity, organic C-1 40 0.1 odor very 0.1 hard 5 NR 5 dark gray 0.2

0.0

C-2 28 0.1

NR

10 NR 10 minor wood, glass, and paper 1.5

0.0 slight oily odor C-3 46 4.8

0.3

15 NR 15

0.0

0.0

C-4 33 0.0

NR

20 NR 20

0.1

0.0

C-5 15 NR

NR

NR 25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling LOCATION DRILLING METHOD DRILL RIG BORING NO.

11/3/15 22.1’ 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-13E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ north of pin see Boring Location Plan gravel 35’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

dark gray wet soft lean clay alluvium moderate to high

plasticity 0.1

0.1

C-6 16 NR

NR

30 NR 30 gray loose poorly fine to coarse graded sand 0.2 sand NR

C-7 12 NR

NR

35 NR 35 bottom of boring at 35’

temporary 1” PVC well set with 20’ of 0.010” slot screen from 15-35’

40 40

45 45

50 50

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling N/E 18th Street Viaduct Reinert Miller 15428.01 11/3/15

End of Drilling N/E LOCATION DRILLING METHOD DRILL RIG BORING NO.

N/E=none encountered 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-14E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ east of pin see Boring Location Plan grass 10’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

light moist firm lean clay fill low to moderate

brown plasticity, silty clay 0.0

dark gray 0.0

ol gray C-1 49 0.0 brown 0.0 olive 5 gray NR 5

dk gray 0.3 gray soft 0.1 olive gray C-2 36 0.0

NR

10 NR 10 bottom of boring at 10’

15 15

20 20

25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling N/E 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling N/E LOCATION DRILLING METHOD DRILL RIG BORING NO.

N/E=none encountered 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-17E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 12’ north of pin see Boring Location Plan grass 1102.00’ 5’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

light very firm silt fill < 5% sand and

brown moist gravel 0.0

dark 0.0 brown C-1 46 0.0

0.0

5 NR 5 bottom of boring at 5’

10 10

15 15

20 20

25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling N/E 18th Street Viaduct Reinert Miller 15428.01 11/3/15

End of Drilling N/E LOCATION DRILLING METHOD DRILL RIG BORING NO.

N/E=none encountered 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-19E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ northwest of pin see Boring Location Plan gravel 10’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

brown moist firm lean clay fill 5-10% sand and

gravel 0.0 brown moist firm lean clay alluvium low to moderate plasticity 0.0

C-1 49 0.0

0.0

5 NR 5

0.0

0.0

C-2 53 0.0

0.0

10 0.0 10 bottom of boring at 10’

15 15

20 20

25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling N/E 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling N/E LOCATION DRILLING METHOD DRILL RIG BORING NO.

N/E=none encountered 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-20E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ north of pin see Boring Location Plan grass 1100.00’ 5’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

brown slightly dense lean clay alluvium low to moderate

moist plasticity, silty clay 0.0

< 5% organics 0.0

C-1 44 0.0

0.0

5 NR 5 bottom of boring at 5’

10 10

15 15

20 20

25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling N/E 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling N/E LOCATION DRILLING METHOD DRILL RIG BORING NO.

N/E=none encountered 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-22E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ north of pin see Boring Location Plan grass 1103.75’ 10’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

light moist hard lean clay fill

brown 0.0 10-20% ash/cinder 0.1

C-1 44 0.0

0.0

5 NR 5

< 5% sand and 0.0 gravel with ash/ cinder, brick 0.0

C-2 23 NR

NR

10 NR 10 bottom of boring at 10’

15 15

20 20

25 25

BORING LOG WATER LEVEL OBSERVATIONS PROJECT DRILLER LOGGER JOB NO. DATE

During Drilling N/E 18th Street Viaduct Reinert Miller 15428.01 11/2/15

End of Drilling N/E LOCATION DRILLING METHOD DRILL RIG BORING NO.

N/E=none encountered 18th St. & Floyd Blvd., Sioux City, IA DT22 GP 7822DT B-24E

LOCATION OF BORING TYPE OF SURFACE ELEVATION DEPTH

offset 5’ north of pin see Boring Location Plan grass 1103.22’ 2’ VISUAL/MANUAL DESCRIPTION SAMPLE DATA HEADSPACE READING RELATIVE DEP DEP SOIL GEOLOGIC NO. & SPT REC COLOR MOIST. CONSIST. REMARKS RESPONSE (ft.) (ft.) TYPE ORIGIN TYPE (bpf) (in.) UNITS (RRU)

light slightly firm lean clay fill

brown moist 0.0 C-1 24

light gray hard concrete 0.0 Refusal at 2’

5 5

10 10

15 15

20 20

25 25

1 2 3 4 5 ANALYTICAL REPORT 6 TestAmerica Laboratories, Inc. TestAmerica Cedar Falls 7 704 Enterprise Drive Cedar Falls, IA 50613 8 Tel: (319)277-2401 9 TestAmerica Job ID: 310-68161-1 TestAmerica Sample Delivery Group: 15428.01 10 Client Project/Site: 18th St Bridge - Sioux City , IA 11 For: Thiele Geotech Inc. 12 13478 Chandler Road Omaha, Nebraska 68138 13

Attn: Robert Miller 14 15

Authorized for release by: 11/12/2015 1:22:29 PM Angela Muehling, Project Manager I (319)277-2401 [email protected]

This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature.

Results relate only to the items tested and the sample(s) as received by the laboratory. Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Table of Contents Cover Page ...... 1 3 Table of Contents ...... 2 4 3 Case Narrative ...... 5 Sample Summary ...... 5 Detection Summary ...... 6 6 Client Sample Results ...... 9 7 Definitions ...... 71 8 Surrogate Summary ...... 72 QC Sample Results ...... 78 9 QC Association ...... 114 10 Chronicle ...... 122 Certification Summary ...... 130 11 Method Summary ...... 131 12 Chain of Custody ...... 132 13 Receipt Checklists ...... 138 14 15

TestAmerica Cedar Falls Page 2 of 139 11/12/2015 Case Narrative 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Job ID: 310-68161-1 3 Laboratory: TestAmerica Cedar Falls 4 Narrative Job Narrative 5 310-68161-1 6 Comments No additional comments. 7 Receipt The samples were received on 11/4/2015 9:35 AM; the samples arrived in good condition, properly preserved and, where required, on ice. 8 The temperatures of the 3 coolers at receipt time were 2.7º C, 3.0º C and 3.3º C. 9 GC/MS VOA Method(s) 8260C: The following volatiles sample was diluted due to foaming at the time of purging during the original sample analysis: 10 B-13E (310-68161-15). Elevated reporting limits (RLs) are provided. 11 Method(s) 8260C: Surrogate recovery for the following sample was outside control limits: B-9E 2.5-3.5' (310-68161-3). Re-extraction and/or re-analysis was performed with concurring results. The original analysis has been reported. 12 No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. 13 GC/MS Semi VOA Method(s) 8270D: The following samples was diluted due to the nature of the sample matrix: B-11E 0-1.5' (310-68161-5), B-13E 10-13' 14 (310-68161-7), B-17E 0-4' (310-68161-9), B-19E 0-4' (310-68161-10) and B-22E 1-2.5' (310-68161-12). Elevated reporting limits (RLs) are provided. 15 Method(s) 8270D: Surrogate recovery for the following samples was outside control limits: B-8E 0.5-5' (310-68161-1), and B-22E 1-2.5' (310-68161-12). Evidence of matrix interference is present; therefore, re-extraction and/or re-analysis was not performed.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

GC Semi VOA Method(s) 8081B: Surrogate recovery for the following sample was outside of acceptance limits: B-13E (310-68161-15). There was insufficient sample to perform a re-extraction; therefore, the data have been reported.

Method(s) 8082A: Surrogate recovery for the following samples was outside the upper control limit: B-8E (310-68161-13), B-9E (310-68161-14) and B-13E (310-68161-15). This sample did not contain any target analytes; therefore, re-extraction and/or re-analysis was not performed.

Method(s) 8081B: The following samples were diluted due to the nature of the sample matrix: B-9E 7.5-9' (310-68161-4), B-13E 10-13' (310-68161-7), B-17E 0-4' (310-68161-9), B-19E 0-4' (310-68161-10) and B-22E 1-2.5' (310-68161-12). Elevated reporting limits (RLs) are provided.

Method(s) 8081B: The following sample required a dilution due to the nature of the sample matrix: B-11E 0-1.5' (310-68161-5). Because of this dilution, the surrogate spike concentration in the sample was reduced to a level where the recovery calculation does not provide useful information.

Method(s) 8081B: DCB surrogate recovery for the following sample was outside control limits: B-17E 0-4' (310-68161-9). Evidence of matrix interference is present; therefore, re-extraction and re-analysis was not performed.

Method(s) 8081B: The following samples required a mercury clean-up, via EPA Method 3660A, to reduce matrix interferences caused by sulfur: B-9E 7.5-9' (310-68161-4), B-11E 0-1.5' (310-68161-5), B-13E 10-13' (310-68161-7) and B-14E 5-7' (310-68161-8). The reagent lot number used was: 114634.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

Metals

TestAmerica Cedar Falls Page 3 of 139 11/12/2015 Case Narrative 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Job ID: 310-68161-1 (Continued) 3 Laboratory: TestAmerica Cedar Falls (Continued) 4 Method(s) 6010C: The following samples was diluted due to the presence of an interferent: B-8E 0.5-5' (310-68161-1), B-11E 0-1.5' (310-68161-5) and B-22E 1-2.5' (310-68161-12). Elevated reporting limits (RLs) are provided. 5 Method(s) 6020A: The following sample was diluted due to the nature of the sample matrix: B-13E (310-68161-15). Elevated reporting limits (RLs) are provided. 6

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. 7 General Chemistry 8 No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.

Organic Prep 9 No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. 10 VOA Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. 11 12 13 14 15

TestAmerica Cedar Falls Page 4 of 139 11/12/2015 Sample Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 3 Lab Sample ID Client Sample ID Matrix Collected Received 310-68161-1 B-8E 0.5-5' Soil 11/02/15 11:25 11/04/15 09:35 310-68161-2 B-8E 6-7.5' Soil 11/02/15 11:30 11/04/15 09:35 4 310-68161-3 B-9E 2.5-3.5' Soil 11/02/15 12:25 11/04/15 09:35 310-68161-4 B-9E 7.5-9' Soil 11/02/15 12:30 11/04/15 09:35 5 310-68161-5 B-11E 0-1.5' Soil 11/02/15 13:20 11/04/15 09:35 310-68161-6 B-11E 3-4' Soil 11/02/15 13:25 11/04/15 09:35 6 310-68161-7 B-13E 10-13' Soil 11/02/15 16:00 11/04/15 09:35 310-68161-8 B-14E 5-7' Soil 11/03/15 08:10 11/04/15 09:35 7 310-68161-9 B-17E 0-4' Soil 11/02/15 15:00 11/04/15 09:35 310-68161-10 B-19E 0-4' Soil 11/03/15 09:15 11/04/15 09:35 8 310-68161-11 B-20E 0-4' Soil 11/02/15 15:20 11/04/15 09:35 310-68161-12 B-22E 1-2.5' Soil 11/02/15 13:55 11/04/15 09:35 9 310-68161-13 B-8E Ground Water 11/03/15 11:40 11/04/15 09:35 310-68161-14 B-9E Ground Water 11/03/15 14:10 11/04/15 09:35 10 310-68161-15 B-13E Ground Water 11/03/15 15:30 11/04/15 09:35 310-68161-16 Trip Blank Water 11/02/15 00:00 11/04/15 09:35 11 12 13 14 15

TestAmerica Cedar Falls

Page 5 of 139 11/12/2015 Detection Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E 0.5-5' Lab Sample ID: 310-68161-1 3 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 4 Total Extractable Hydrocarbons Z18.6 14.2 mg/Kg 1 OA-2 Total/NA Chromium 40.5 7.39 mg/Kg 5 ☼ 6010C Total/NA Copper 9.46 7.39 mg/Kg 5 ☼ 6010C Total/NA 5 ☼ Zinc 54.1 7.39 mg/Kg 5 6010C Total/NA 6 Client Sample ID: B-8E 6-7.5' Lab Sample ID: 310-68161-2 7 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Acetone 238 162 ug/Kg 1 ☼ 8260C Total/NA 8

Client Sample ID: B-9E 2.5-3.5' Lab Sample ID: 310-68161-3 9 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 10 Acetone 488 269 ug/Kg 1 ☼ 8260C Total/NA 11 Client Sample ID: B-9E 7.5-9' Lab Sample ID: 310-68161-4 12 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Total Extractable Hydrocarbons Z20.7 14.9 mg/Kg 1 OA-2 Total/NA Arsenic 7.45 5.13 mg/Kg 1 ☼ 6010C Total/NA 13 Chromium 23.2 1.28 mg/Kg 1 ☼ 6010C Total/NA Copper 26.5 1.28 mg/Kg 1 ☼ 6010C Total/NA 14 Lead 53.1 6.41 mg/Kg 1 ☼ 6010C Total/NA Nickel 21.1 3.21 mg/Kg 1 ☼ 6010C Total/NA 15 Zinc 136 1.28 mg/Kg 1 ☼ 6010C Total/NA Mercury 0.0720 0.0224 mg/Kg 1 ☼ 7471B Total/NA

Client Sample ID: B-11E 0-1.5' Lab Sample ID: 310-68161-5

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Chromium 16.6 2.05 mg/Kg 2 ☼ 6010C Total/NA Copper 21.7 2.05 mg/Kg 2 ☼ 6010C Total/NA Lead 47.1 10.3 mg/Kg 2 ☼ 6010C Total/NA Nickel 17.8 5.14 mg/Kg 2 ☼ 6010C Total/NA Zinc 122 2.05 mg/Kg 2 ☼ 6010C Total/NA Mercury 0.0658 0.0225 mg/Kg 1 ☼ 7471B Total/NA

Client Sample ID: B-11E 3-4' Lab Sample ID: 310-68161-6

No Detections.

Client Sample ID: B-13E 10-13' Lab Sample ID: 310-68161-7

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Acetone 210 158 ug/Kg 1 ☼ 8260C Total/NA PCB-1242 0.549 0.0666 mg/Kg 1 ☼ 8082A Total/NA Waste Oil 1020 9.92 mg/Kg 1 OA-2 Total/NA Total Extractable Hydrocarbons 1080 14.9 mg/Kg 1 OA-2 Total/NA Arsenic 6.19 4.02 mg/Kg 1 ☼ 6010C Total/NA Chromium 17.6 1.01 mg/Kg 1 ☼ 6010C Total/NA Copper 19.6 1.01 mg/Kg 1 ☼ 6010C Total/NA

This Detection Summary does not include radiochemical test results. TestAmerica Cedar Falls

Page 6 of 139 11/12/2015 Detection Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E 10-13' (Continued) Lab Sample ID: 310-68161-7 3

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Lead 31.3 5.03 mg/Kg 1 ☼ 6010C Total/NA 4 Nickel 18.0 2.51 mg/Kg 1 ☼ 6010C Total/NA Zinc 115 1.01 mg/Kg 1 ☼ 6010C Total/NA 5

Client Sample ID: B-14E 5-7' Lab Sample ID: 310-68161-8 6

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 7 Arsenic 7.16 3.92 mg/Kg 1 ☼ 6010C Total/NA Chromium 17.3 0.981 mg/Kg 1 ☼ 6010C Total/NA 8 Copper 17.9 0.981 mg/Kg 1 ☼ 6010C Total/NA Lead 11.7 4.91 mg/Kg 1 ☼ 6010C Total/NA 9 Nickel 22.0 2.45 mg/Kg 1 ☼ 6010C Total/NA Zinc 71.6 0.981 mg/Kg 1 ☼ 6010C Total/NA 10 Mercury 0.0353 0.0242 mg/Kg 1 ☼ 7471B Total/NA 11 Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 12 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Waste Oil 40.7 9.89 mg/Kg 1 OA-2 Total/NA Total Extractable Hydrocarbons 46.1 14.8 mg/Kg 1 OA-2 Total/NA 13 Arsenic 10.0 4.67 mg/Kg 1 ☼ 6010C Total/NA Chromium 19.2 1.17 mg/Kg 1 ☼ 6010C Total/NA 14 Copper 22.0 1.17 mg/Kg 1 ☼ 6010C Total/NA Lead 216 5.83 mg/Kg 1 ☼ 6010C Total/NA 15 Nickel 25.4 2.92 mg/Kg 1 ☼ 6010C Total/NA Zinc 103 1.17 mg/Kg 1 ☼ 6010C Total/NA Mercury 0.0362 0.0242 mg/Kg 1 ☼ 7471B Total/NA

Client Sample ID: B-19E 0-4' Lab Sample ID: 310-68161-10

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Waste Oil 204 9.96 mg/Kg 1 OA-2 Total/NA Total Extractable Hydrocarbons 271 14.9 mg/Kg 1 OA-2 Total/NA Arsenic 9.23 4.63 mg/Kg 1 ☼ 6010C Total/NA Beryllium 0.639 0.579 mg/Kg 1 ☼ 6010C Total/NA Chromium 21.8 1.16 mg/Kg 1 ☼ 6010C Total/NA Copper 21.2 1.16 mg/Kg 1 ☼ 6010C Total/NA Lead 33.9 5.79 mg/Kg 1 ☼ 6010C Total/NA Nickel 28.5 2.90 mg/Kg 1 ☼ 6010C Total/NA Zinc 82.5 1.16 mg/Kg 1 ☼ 6010C Total/NA

Client Sample ID: B-20E 0-4' Lab Sample ID: 310-68161-11

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Total Extractable Hydrocarbons Z14.9 14.7 mg/Kg 1 OA-2 Total/NA Chromium 19.4 1.04 mg/Kg 1 ☼ 6010C Total/NA Copper 16.7 1.04 mg/Kg 1 ☼ 6010C Total/NA Lead 12.2 5.19 mg/Kg 1 ☼ 6010C Total/NA Nickel 26.3 2.60 mg/Kg 1 ☼ 6010C Total/NA Zinc 70.7 1.04 mg/Kg 1 ☼ 6010C Total/NA

This Detection Summary does not include radiochemical test results. TestAmerica Cedar Falls

Page 7 of 139 11/12/2015 Detection Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-22E 1-2.5' Lab Sample ID: 310-68161-12 3 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 4 PCB-1254 0.0693 0.0566 mg/Kg 1 ☼ 8082A Total/NA Waste Oil 392 9.95 mg/Kg 1 OA-2 Total/NA Total Extractable Hydrocarbons 609 14.9 mg/Kg 1 OA-2 Total/NA 5 Chromium 13.4 4.24 mg/Kg 5 ☼ 6010C Total/NA Copper 11.5 4.24 mg/Kg 5 ☼ 6010C Total/NA 6 Lead 26.7 21.2 mg/Kg 5 ☼ 6010C Total/NA Nickel 15.0 10.6 mg/Kg 5 ☼ 6010C Total/NA 7 Zinc 76.2 4.24 mg/Kg 5 ☼ 6010C Total/NA Mercury 0.0443 0.0205 mg/Kg 1 ☼ 7471B Total/NA 8

Client Sample ID: B-8E Lab Sample ID: 310-68161-13 9 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 10 Bis(2-ethylhexyl) phthalate 11.2 10.6 ug/L 1 8270D Total/NA Arsenic 7.64 2.00 ug/L 1 6020A Total/NA 11 Chromium 7.57 5.00 ug/L 1 6020A Total/NA Copper 3.87 2.00 ug/L 1 6020A Total/NA 12 Lead 3.56 0.500 ug/L 1 6020A Total/NA Nickel 9.76 5.00 ug/L 1 6020A Total/NA Zinc 13.3 10.0 ug/L 1 6020A Total/NA 13 14 Client Sample ID: B-9E Lab Sample ID: 310-68161-14

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 15 Arsenic 3.43 2.00 ug/L 1 6020A Total/NA Lead 1.45 0.500 ug/L 1 6020A Total/NA Nickel 15.1 5.00 ug/L 1 6020A Total/NA

Client Sample ID: B-13E Lab Sample ID: 310-68161-15

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Benzene 102 5.00 ug/L 10 8260C Total/NA Bis(2-ethylhexyl) phthalate 13.2 10.3 ug/L 1 8270D Total/NA Waste Oil 1550 278 ug/L 1 OA-2 Total/NA Total Extractable Hydrocarbons 2240 463 ug/L 1 OA-2 Total/NA Antimony 1.60 1.00 ug/L 1 6020A Total/NA Arsenic 10.1 2.00 ug/L 1 6020A Total/NA Chromium 8.41 5.00 ug/L 1 6020A Total/NA Copper 3.73 2.00 ug/L 1 6020A Total/NA Lead 6.27 1.00 ug/L 2 6020A Total/NA Nickel 22.4 5.00 ug/L 1 6020A Total/NA Zinc 24.1 10.0 ug/L 1 6020A Total/NA

Client Sample ID: Trip Blank Lab Sample ID: 310-68161-16

No Detections.

This Detection Summary does not include radiochemical test results. TestAmerica Cedar Falls

Page 8 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E 0.5-5' Lab Sample ID: 310-68161-1 3 Date Collected: 11/02/15 11:25 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 59.4 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Anthracene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Benzo[a]anthracene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 6 Benzo[a]pyrene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Benzidine <5430 5430 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 7 Benzo[b]fluoranthene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Benzo[g,h,i]perylene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 8 Benzo[k]fluoranthene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Acenaphthene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 9 Acenaphthylene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Benzyl alcohol <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 10 Butyl benzyl phthalate <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Bis(2-chloroethyl)ether <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Bis(2-chloroethoxy)methane <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 11 Bis(2-ethylhexyl) phthalate <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 bis (2-chloroisopropyl) ether <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 12 4-Bromophenyl phenyl ether <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Carbazole <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 13 4-Chloroaniline <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 2-Chloronaphthalene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 14 4-Chlorophenyl phenyl ether <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Chrysene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 15 Dibenz(a,h)anthracene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Dibenzofuran <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Di-n-butyl phthalate <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 1,2-Dichlorobenzene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 1,3-Dichlorobenzene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 1,4-Dichlorobenzene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 3,3'-Dichlorobenzidine <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Diethyl phthalate <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Dimethyl phthalate <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 2,4-Dinitrotoluene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 2,6-Dinitrotoluene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Fluorene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Hexachlorobenzene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Hexachlorobutadiene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Hexachlorocyclopentadiene <1090 1090 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Hexachloroethane <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Di-n-octyl phthalate <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Fluoranthene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Indeno[1,2,3-cd]pyrene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Isophorone <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 2-Methylnaphthalene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Naphthalene <329 329 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 2-Nitroaniline <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 3-Nitroaniline <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 4-Nitroaniline <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Nitrobenzene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 N-Nitrosodiphenylamine <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 N-Nitrosodi-n-propylamine <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1

TestAmerica Cedar Falls

Page 9 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E 0.5-5' Lab Sample ID: 310-68161-1 Date Collected: 11/02/15 11:25 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 59.4 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 N-Nitrosodimethylamine <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Phenanthrene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 6 Pyrene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Pyridine <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 7 1,2,4-Trichlorobenzene <543 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Benzoic acid <1090 1090 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 8 4-Chloro-3-methylphenol <543 F1 F2 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 2-Chlorophenol <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Total Cresols <543 F1 F2 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 9 2,4-Dichlorophenol <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 2,4-Dimethylphenol <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 10 2,4-Dinitrophenol <1090 F1 1090 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 4,6-Dinitro-2-methylphenol <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 11 2-Methylphenol <543 F1 F2 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Methylphenol, 3 & 4 <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 12 2-Nitrophenol <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 4-Nitrophenol <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 13 Pentachlorophenol <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 Phenol <543 F1 F2 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 14 2,4,5-Trichlorophenol <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 2,4,6-Trichlorophenol <543 F1 543 ug/Kg ☼ 11/05/15 11:51 11/06/15 15:52 1 15 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 0.03 X 15 - 90 11/05/15 11:51 11/06/15 15:52 1 Phenol-d6 (Surr) 0.9 X 20 - 90 11/05/15 11:51 11/06/15 15:52 1 Nitrobenzene-d5 (Surr) 39 15 - 90 11/05/15 11:51 11/06/15 15:52 1 2-Fluorobiphenyl (Surr) 39 20 - 90 11/05/15 11:51 11/06/15 15:52 1 2,4,6-Tribromophenol (Surr) 0.1 X 25 - 105 11/05/15 11:51 11/06/15 15:52 1 Terphenyl-d14 (Surr) 44 35 - 110 11/05/15 11:51 11/06/15 15:52 1

Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aldrin <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 alpha-BHC <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 beta-BHC <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Chlordane (technical) <11.2 11.2 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 4,4'-DDD <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 4,4'-DDE <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 4,4'-DDT <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 delta-BHC <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Dieldrin <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Endosulfan I <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Endosulfan II <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Endosulfan sulfate <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Endrin <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Endrin aldehyde <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 gamma-BHC (Lindane) <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Heptachlor <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Heptachlor epoxide <2.85 2.85 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1 Toxaphene <28.0 28.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 14:07 1

TestAmerica Cedar Falls

Page 10 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E 0.5-5' Lab Sample ID: 310-68161-1 Date Collected: 11/02/15 11:25 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 59.4 4

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 100 56 - 128 11/06/15 16:28 11/09/15 14:07 1 5 Tetrachloro-m-xylene 82 45 - 112 11/06/15 16:28 11/09/15 14:07 1 6 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 7 PCB-1016 <0.0833 0.0833 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:40 1 PCB-1221 <0.0833 0.0833 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:40 1 8 PCB-1232 <0.0833 0.0833 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:40 1 PCB-1242 <0.0833 0.0833 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:40 1 9 PCB-1248 <0.0833 0.0833 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:40 1 PCB-1254 <0.0833 0.0833 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:40 1 10 PCB-1260 <0.0833 0.0833 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:40 1 PCB-1268 <0.0833 0.0833 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:40 1 11 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 63 40 - 120 11/05/15 11:56 11/09/15 12:40 1 12 Tetrachloro-m-xylene 41 10 - 105 11/05/15 11:56 11/09/15 12:40 1 13 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 14 Diesel <9.48 9.48 mg/Kg 11/05/15 11:49 11/06/15 11:43 1 Gasoline <9.48 9.48 mg/Kg 11/05/15 11:49 11/06/15 11:43 1 Waste Oil <9.48 9.48 mg/Kg 11/05/15 11:49 11/06/15 11:43 1 15 Total Extractable Hydrocarbons 18.6 Z 14.2 mg/Kg 11/05/15 11:49 11/06/15 11:43 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 102 40 - 135 11/05/15 11:49 11/06/15 11:43 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <36.9 36.9 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Arsenic <29.5 29.5 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Beryllium <3.69 3.69 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Cadmium <7.39 7.39 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Chromium 40.5 7.39 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Copper 9.46 7.39 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Lead <36.9 36.9 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Nickel <18.5 18.5 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Selenium <55.4 55.4 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Silver <7.39 7.39 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5 Zinc 54.1 7.39 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:51 5

Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Thallium <1.22 1.22 mg/Kg ☼ 11/05/15 16:24 11/06/15 18:04 4

Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.0335 0.0335 mg/Kg ☼ 11/04/15 15:55 11/06/15 12:03 1

TestAmerica Cedar Falls

Page 11 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E 6-7.5' Lab Sample ID: 310-68161-2 3 Date Collected: 11/02/15 11:30 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 75.3 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone 238 162 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Benzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 6 Bromobenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Bromochloromethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 7 Bromodichloromethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Bromoform <32.3 32.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 8 Bromomethane <64.6 64.6 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 2-Butanone (MEK) <162 162 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 9 n-Butylbenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 sec-Butylbenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 10 tert-Butylbenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Carbon disulfide <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Carbon tetrachloride <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 11 Chlorobenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Chlorodibromomethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 12 Chloroethane <64.6 64.6 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Chloroform <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 13 Chloromethane <64.6 64.6 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 2-Chlorotoluene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 14 4-Chlorotoluene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,2-Dibromo-3-Chloropropane <162 162 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 15 1,2-Dibromoethane (EDB) <162 162 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Dibromomethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,2-Dichlorobenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,3-Dichlorobenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,4-Dichlorobenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Dichlorodifluoromethane <48.5 48.5 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,1-Dichloroethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,2-Dichloroethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,1-Dichloroethene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 cis-1,2-Dichloroethene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 trans-1,2-Dichloroethene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,2-Dichloropropane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,3-Dichloropropane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 2,2-Dichloropropane <64.6 64.6 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,1-Dichloropropene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 cis-1,3-Dichloropropene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 trans-1,3-Dichloropropene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Ethylbenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Hexachlorobutadiene <80.8 80.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Hexane <80.8 80.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Isopropylbenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 p-Isopropyltoluene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Methylene Chloride <162 162 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Methyl tert-butyl ether <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Naphthalene <80.8 80.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 N-Propylbenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Styrene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,1,1,2-Tetrachloroethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1

TestAmerica Cedar Falls

Page 12 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E 6-7.5' Lab Sample ID: 310-68161-2 Date Collected: 11/02/15 11:30 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 75.3 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Tetrachloroethene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 6 Toluene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,2,3-Trichlorobenzene <80.8 80.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 7 1,2,4-Trichlorobenzene <80.8 80.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,1,1-Trichloroethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 8 1,1,2-Trichloroethane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Trichloroethene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Trichlorofluoromethane <64.6 64.6 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 9 1,2,3-Trichloropropane <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 1,2,4-Trimethylbenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 10 1,3,5-Trimethylbenzene <16.2 16.2 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 Vinyl chloride <48.5 48.5 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 11 Xylenes, Total <48.5 48.5 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:14 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 90 80 - 120 11/06/15 07:11 11/06/15 17:14 1 13 Dibromofluoromethane (Surr) 93 75 - 125 11/06/15 07:11 11/06/15 17:14 1 Toluene-d8 (Surr) 103 80 - 120 11/06/15 07:11 11/06/15 17:14 1 14 15

TestAmerica Cedar Falls

Page 13 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E 2.5-3.5' Lab Sample ID: 310-68161-3 3 Date Collected: 11/02/15 12:25 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 44.6 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone 488 269 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Benzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 6 Bromobenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Bromochloromethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 7 Bromodichloromethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Bromoform <53.8 53.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 8 Bromomethane <108 108 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 2-Butanone (MEK) <269 269 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 9 n-Butylbenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 sec-Butylbenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 10 tert-Butylbenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Carbon disulfide <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Carbon tetrachloride <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 11 Chlorobenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Chlorodibromomethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 12 Chloroethane <108 108 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Chloroform <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 13 Chloromethane <108 108 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 2-Chlorotoluene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 14 4-Chlorotoluene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,2-Dibromo-3-Chloropropane <269 269 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 15 1,2-Dibromoethane (EDB) <269 269 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Dibromomethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,2-Dichlorobenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,3-Dichlorobenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,4-Dichlorobenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Dichlorodifluoromethane <80.7 80.7 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,1-Dichloroethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,2-Dichloroethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,1-Dichloroethene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 cis-1,2-Dichloroethene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 trans-1,2-Dichloroethene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,2-Dichloropropane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,3-Dichloropropane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 2,2-Dichloropropane <108 108 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,1-Dichloropropene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 cis-1,3-Dichloropropene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 trans-1,3-Dichloropropene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Ethylbenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Hexachlorobutadiene <135 135 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Hexane <135 135 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Isopropylbenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 p-Isopropyltoluene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Methylene Chloride <269 269 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Methyl tert-butyl ether <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Naphthalene <135 135 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 N-Propylbenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Styrene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,1,1,2-Tetrachloroethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1

TestAmerica Cedar Falls

Page 14 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E 2.5-3.5' Lab Sample ID: 310-68161-3 Date Collected: 11/02/15 12:25 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 44.6 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Tetrachloroethene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 6 Toluene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,2,3-Trichlorobenzene <135 135 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 7 1,2,4-Trichlorobenzene <135 135 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,1,1-Trichloroethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 8 1,1,2-Trichloroethane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Trichloroethene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Trichlorofluoromethane <108 108 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 9 1,2,3-Trichloropropane <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 1,2,4-Trimethylbenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 10 1,3,5-Trimethylbenzene <26.9 26.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 Vinyl chloride <80.7 80.7 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 11 Xylenes, Total <80.7 80.7 ug/Kg ☼ 11/06/15 07:11 11/06/15 17:39 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 100 80 - 120 11/06/15 07:11 11/06/15 17:39 1 13 Dibromofluoromethane (Surr) 41 X 75 - 125 11/06/15 07:11 11/06/15 17:39 1 Toluene-d8 (Surr) 100 80 - 120 11/06/15 07:11 11/06/15 17:39 1 14 15

TestAmerica Cedar Falls

Page 15 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E 7.5-9' Lab Sample ID: 310-68161-4 3 Date Collected: 11/02/15 12:30 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 76.3 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Anthracene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Benzo[a]anthracene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 6 Benzo[a]pyrene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Benzidine <4310 4310 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 7 Benzo[b]fluoranthene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Benzo[g,h,i]perylene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 8 Benzo[k]fluoranthene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Acenaphthene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 9 Acenaphthylene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Benzyl alcohol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 10 Butyl benzyl phthalate <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Bis(2-chloroethyl)ether <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Bis(2-chloroethoxy)methane <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 11 Bis(2-ethylhexyl) phthalate <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 bis (2-chloroisopropyl) ether <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 12 4-Bromophenyl phenyl ether <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Carbazole <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 13 4-Chloroaniline <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 2-Chloronaphthalene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 14 4-Chlorophenyl phenyl ether <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Chrysene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 15 Dibenz(a,h)anthracene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Dibenzofuran <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Di-n-butyl phthalate <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 1,2-Dichlorobenzene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 1,3-Dichlorobenzene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 1,4-Dichlorobenzene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 3,3'-Dichlorobenzidine <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Diethyl phthalate <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Dimethyl phthalate <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 2,4-Dinitrotoluene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 2,6-Dinitrotoluene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Fluorene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Hexachlorobenzene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Hexachlorobutadiene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Hexachlorocyclopentadiene <863 863 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Hexachloroethane <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Di-n-octyl phthalate <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Fluoranthene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Indeno[1,2,3-cd]pyrene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Isophorone <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 2-Methylnaphthalene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Naphthalene <261 261 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 2-Nitroaniline <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 3-Nitroaniline <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 4-Nitroaniline <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Nitrobenzene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 N-Nitrosodiphenylamine <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 N-Nitrosodi-n-propylamine <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1

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Page 16 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E 7.5-9' Lab Sample ID: 310-68161-4 Date Collected: 11/02/15 12:30 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 76.3 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 N-Nitrosodimethylamine <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Phenanthrene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 6 Pyrene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Pyridine <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 7 1,2,4-Trichlorobenzene <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Benzoic acid <863 863 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 8 4-Chloro-3-methylphenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 2-Chlorophenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Total Cresols <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 9 2,4-Dichlorophenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 2,4-Dimethylphenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 10 2,4-Dinitrophenol <863 863 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 4,6-Dinitro-2-methylphenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 11 2-Methylphenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Methylphenol, 3 & 4 <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 12 2-Nitrophenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 4-Nitrophenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 13 Pentachlorophenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 Phenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 14 2,4,5-Trichlorophenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 2,4,6-Trichlorophenol <431 431 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:06 1 15 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 38 15 - 90 11/05/15 11:51 11/06/15 17:06 1 Phenol-d6 (Surr) 41 20 - 90 11/05/15 11:51 11/06/15 17:06 1 Nitrobenzene-d5 (Surr) 29 15 - 90 11/05/15 11:51 11/06/15 17:06 1 2-Fluorobiphenyl (Surr) 36 20 - 90 11/05/15 11:51 11/06/15 17:06 1 2,4,6-Tribromophenol (Surr) 49 25 - 105 11/05/15 11:51 11/06/15 17:06 1 Terphenyl-d14 (Surr) 48 35 - 110 11/05/15 11:51 11/06/15 17:06 1

Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aldrin <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 alpha-BHC <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 beta-BHC <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Chlordane (technical) <41.8 41.8 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 4,4'-DDD <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 4,4'-DDE <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 4,4'-DDT <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 delta-BHC <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Dieldrin <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Endosulfan I <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Endosulfan II <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Endosulfan sulfate <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Endrin <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Endrin aldehyde <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 gamma-BHC (Lindane) <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Heptachlor <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Heptachlor epoxide <10.6 10.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5 Toxaphene <104 104 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:31 5

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Page 17 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E 7.5-9' Lab Sample ID: 310-68161-4 Date Collected: 11/02/15 12:30 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 76.3 4

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 124 56 - 128 11/06/15 16:28 11/10/15 13:31 5 5 Tetrachloro-m-xylene 86 45 - 112 11/06/15 16:28 11/10/15 13:31 5 6 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 7 PCB-1016 <0.0638 0.0638 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:51 1 PCB-1221 <0.0638 0.0638 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:51 1 8 PCB-1232 <0.0638 0.0638 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:51 1 PCB-1242 <0.0638 0.0638 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:51 1 9 PCB-1248 <0.0638 0.0638 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:51 1 PCB-1254 <0.0638 0.0638 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:51 1 10 PCB-1260 <0.0638 0.0638 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:51 1 PCB-1268 <0.0638 0.0638 mg/Kg ☼ 11/05/15 11:56 11/09/15 12:51 1 11 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 68 40 - 120 11/05/15 11:56 11/09/15 12:51 1 12 Tetrachloro-m-xylene 48 10 - 105 11/05/15 11:56 11/09/15 12:51 1 13 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 14 Diesel <9.95 9.95 mg/Kg 11/05/15 11:49 11/06/15 11:57 1 Gasoline <9.95 9.95 mg/Kg 11/05/15 11:49 11/06/15 11:57 1 Waste Oil <9.95 9.95 mg/Kg 11/05/15 11:49 11/06/15 11:57 1 15 Total Extractable Hydrocarbons 20.7 Z 14.9 mg/Kg 11/05/15 11:49 11/06/15 11:57 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 75 40 - 135 11/05/15 11:49 11/06/15 11:57 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <6.41 6.41 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Arsenic 7.45 5.13 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Beryllium <0.641 0.641 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Cadmium <1.28 1.28 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Chromium 23.2 1.28 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Copper 26.5 1.28 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Lead 53.1 6.41 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Nickel 21.1 3.21 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Selenium <9.62 9.62 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Silver <1.28 1.28 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1 Zinc 136 1.28 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:00 1

Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Thallium <1.10 1.10 mg/Kg ☼ 11/05/15 16:24 11/06/15 18:08 4

Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury 0.0720 0.0224 mg/Kg ☼ 11/04/15 15:55 11/06/15 12:04 1

TestAmerica Cedar Falls

Page 18 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-11E 0-1.5' Lab Sample ID: 310-68161-5 3 Date Collected: 11/02/15 13:20 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 83.1 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Anthracene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Benzo[a]anthracene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 6 Benzo[a]pyrene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Benzidine <39400 39400 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 7 Benzo[b]fluoranthene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Benzo[g,h,i]perylene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 8 Benzo[k]fluoranthene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Acenaphthene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 9 Acenaphthylene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Benzyl alcohol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 10 Butyl benzyl phthalate <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Bis(2-chloroethyl)ether <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Bis(2-chloroethoxy)methane <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 11 Bis(2-ethylhexyl) phthalate <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 bis (2-chloroisopropyl) ether <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 12 4-Bromophenyl phenyl ether <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Carbazole <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 13 4-Chloroaniline <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 2-Chloronaphthalene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 14 4-Chlorophenyl phenyl ether <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Chrysene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 15 Dibenz(a,h)anthracene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Dibenzofuran <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Di-n-butyl phthalate <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 1,2-Dichlorobenzene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 1,3-Dichlorobenzene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 1,4-Dichlorobenzene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 3,3'-Dichlorobenzidine <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Diethyl phthalate <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Dimethyl phthalate <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 2,4-Dinitrotoluene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 2,6-Dinitrotoluene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Fluorene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Hexachlorobenzene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Hexachlorobutadiene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Hexachlorocyclopentadiene <7880 7880 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Hexachloroethane <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Di-n-octyl phthalate <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Fluoranthene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Indeno[1,2,3-cd]pyrene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Isophorone <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 2-Methylnaphthalene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Naphthalene <2390 2390 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 2-Nitroaniline <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 3-Nitroaniline <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 4-Nitroaniline <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Nitrobenzene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 N-Nitrosodiphenylamine <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 N-Nitrosodi-n-propylamine <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10

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Page 19 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-11E 0-1.5' Lab Sample ID: 310-68161-5 Date Collected: 11/02/15 13:20 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 83.1 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 N-Nitrosodimethylamine <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Phenanthrene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 6 Pyrene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Pyridine <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 7 1,2,4-Trichlorobenzene <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Benzoic acid <7880 7880 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 8 4-Chloro-3-methylphenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 2-Chlorophenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Total Cresols <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 9 2,4-Dichlorophenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 2,4-Dimethylphenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 10 2,4-Dinitrophenol <7880 7880 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 4,6-Dinitro-2-methylphenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 11 2-Methylphenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Methylphenol, 3 & 4 <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 12 2-Nitrophenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 4-Nitrophenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 13 Pentachlorophenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 Phenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 14 2,4,5-Trichlorophenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 2,4,6-Trichlorophenol <3940 3940 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:30 10 15 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 25 15 - 90 11/05/15 11:51 11/06/15 17:30 10 Phenol-d6 (Surr) 31 20 - 90 11/05/15 11:51 11/06/15 17:30 10 Nitrobenzene-d5 (Surr) 35 15 - 90 11/05/15 11:51 11/06/15 17:30 10 2-Fluorobiphenyl (Surr) 36 20 - 90 11/05/15 11:51 11/06/15 17:30 10 2,4,6-Tribromophenol (Surr) 35 25 - 105 11/05/15 11:51 11/06/15 17:30 10 Terphenyl-d14 (Surr) 43 35 - 110 11/05/15 11:51 11/06/15 17:30 10

Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aldrin <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 alpha-BHC <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 beta-BHC <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Chlordane (technical) <158 158 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 4,4'-DDD <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 4,4'-DDE <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 4,4'-DDT <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 delta-BHC <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Dieldrin <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Endosulfan I <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Endosulfan II <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Endosulfan sulfate <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Endrin <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Endrin aldehyde <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 gamma-BHC (Lindane) <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Heptachlor <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Heptachlor epoxide <40.2 40.2 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20 Toxaphene <395 395 ug/Kg ☼ 11/06/15 16:28 11/10/15 13:51 20

TestAmerica Cedar Falls

Page 20 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-11E 0-1.5' Lab Sample ID: 310-68161-5 Date Collected: 11/02/15 13:20 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 83.1 4

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 0 D 56 - 128 11/06/15 16:28 11/10/15 13:51 20 5 Tetrachloro-m-xylene 0 D 45 - 112 11/06/15 16:28 11/10/15 13:51 20 6 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 7 PCB-1016 <0.0588 0.0588 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:02 1 PCB-1221 <0.0588 0.0588 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:02 1 8 PCB-1232 <0.0588 0.0588 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:02 1 PCB-1242 <0.0588 0.0588 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:02 1 9 PCB-1248 <0.0588 0.0588 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:02 1 PCB-1254 <0.0588 0.0588 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:02 1 10 PCB-1260 <0.0588 0.0588 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:02 1 PCB-1268 <0.0588 0.0588 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:02 1 11 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 61 40 - 120 11/05/15 11:56 11/09/15 13:02 1 12 Tetrachloro-m-xylene 43 10 - 105 11/05/15 11:56 11/09/15 13:02 1 13 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 14 Diesel <9.43 9.43 mg/Kg 11/05/15 11:49 11/06/15 12:11 1 Gasoline <9.43 9.43 mg/Kg 11/05/15 11:49 11/06/15 12:11 1 Waste Oil <9.43 9.43 mg/Kg 11/05/15 11:49 11/06/15 12:11 1 15 Total Extractable Hydrocarbons <14.1 14.1 mg/Kg 11/05/15 11:49 11/06/15 12:11 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 64 40 - 135 11/05/15 11:49 11/06/15 12:11 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <10.3 10.3 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Arsenic <8.22 8.22 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Beryllium <1.03 1.03 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Cadmium <2.05 2.05 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Chromium 16.6 2.05 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Copper 21.7 2.05 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Lead 47.1 10.3 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Nickel 17.8 5.14 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Selenium <15.4 15.4 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Silver <2.05 2.05 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2 Zinc 122 2.05 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:53 2

Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Thallium <1.05 1.05 mg/Kg ☼ 11/05/15 16:24 11/06/15 18:23 4

Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury 0.0658 0.0225 mg/Kg ☼ 11/04/15 15:55 11/06/15 12:06 1

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Page 21 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-11E 3-4' Lab Sample ID: 310-68161-6 3 Date Collected: 11/02/15 13:25 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 82.7 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <149 149 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Benzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 6 Bromobenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Bromochloromethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 7 Bromodichloromethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Bromoform <29.7 29.7 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 8 Bromomethane <59.4 59.4 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 2-Butanone (MEK) <149 149 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 9 n-Butylbenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 sec-Butylbenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 10 tert-Butylbenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Carbon disulfide <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Carbon tetrachloride <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 11 Chlorobenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Chlorodibromomethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 12 Chloroethane <59.4 59.4 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Chloroform <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 13 Chloromethane <59.4 59.4 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 2-Chlorotoluene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 14 4-Chlorotoluene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,2-Dibromo-3-Chloropropane <149 149 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 15 1,2-Dibromoethane (EDB) <149 149 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Dibromomethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,2-Dichlorobenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,3-Dichlorobenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,4-Dichlorobenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Dichlorodifluoromethane <44.6 44.6 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,1-Dichloroethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,2-Dichloroethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,1-Dichloroethene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 cis-1,2-Dichloroethene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 trans-1,2-Dichloroethene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,2-Dichloropropane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,3-Dichloropropane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 2,2-Dichloropropane <59.4 59.4 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,1-Dichloropropene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 cis-1,3-Dichloropropene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 trans-1,3-Dichloropropene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Ethylbenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Hexachlorobutadiene <74.3 74.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Hexane <74.3 74.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Isopropylbenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 p-Isopropyltoluene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Methylene Chloride <149 149 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Methyl tert-butyl ether <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Naphthalene <74.3 74.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 N-Propylbenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Styrene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,1,1,2-Tetrachloroethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1

TestAmerica Cedar Falls

Page 22 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-11E 3-4' Lab Sample ID: 310-68161-6 Date Collected: 11/02/15 13:25 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 82.7 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Tetrachloroethene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 6 Toluene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,2,3-Trichlorobenzene <74.3 74.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 7 1,2,4-Trichlorobenzene <74.3 74.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,1,1-Trichloroethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 8 1,1,2-Trichloroethane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Trichloroethene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Trichlorofluoromethane <59.4 59.4 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 9 1,2,3-Trichloropropane <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 1,2,4-Trimethylbenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 10 1,3,5-Trimethylbenzene <14.9 14.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 Vinyl chloride <44.6 44.6 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 11 Xylenes, Total <44.6 44.6 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:03 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 97 80 - 120 11/06/15 07:11 11/06/15 18:03 1 13 Dibromofluoromethane (Surr) 75 75 - 125 11/06/15 07:11 11/06/15 18:03 1 Toluene-d8 (Surr) 99 80 - 120 11/06/15 07:11 11/06/15 18:03 1 14 15

TestAmerica Cedar Falls

Page 23 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E 10-13' Lab Sample ID: 310-68161-7 3 Date Collected: 11/02/15 16:00 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 73.0 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone 210 158 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Benzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 6 Bromobenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Bromochloromethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 7 Bromodichloromethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Bromoform <31.6 31.6 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 8 Bromomethane <63.1 63.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 2-Butanone (MEK) <158 158 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 9 n-Butylbenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 sec-Butylbenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 10 tert-Butylbenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Carbon disulfide <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Carbon tetrachloride <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 11 Chlorobenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Chlorodibromomethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 12 Chloroethane <63.1 63.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Chloroform <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 13 Chloromethane <63.1 63.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 2-Chlorotoluene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 14 4-Chlorotoluene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,2-Dibromo-3-Chloropropane <158 158 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 15 1,2-Dibromoethane (EDB) <158 158 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Dibromomethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,2-Dichlorobenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,3-Dichlorobenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,4-Dichlorobenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Dichlorodifluoromethane <47.3 47.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,1-Dichloroethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,2-Dichloroethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,1-Dichloroethene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 cis-1,2-Dichloroethene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 trans-1,2-Dichloroethene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,2-Dichloropropane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,3-Dichloropropane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 2,2-Dichloropropane <63.1 63.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,1-Dichloropropene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 cis-1,3-Dichloropropene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 trans-1,3-Dichloropropene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Ethylbenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Hexachlorobutadiene <78.9 78.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Hexane <78.9 78.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Isopropylbenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 p-Isopropyltoluene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Methylene Chloride <158 158 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Methyl tert-butyl ether <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Naphthalene <78.9 78.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 N-Propylbenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Styrene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,1,1,2-Tetrachloroethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1

TestAmerica Cedar Falls

Page 24 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E 10-13' Lab Sample ID: 310-68161-7 Date Collected: 11/02/15 16:00 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 73.0 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Tetrachloroethene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 6 Toluene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,2,3-Trichlorobenzene <78.9 78.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 7 1,2,4-Trichlorobenzene <78.9 78.9 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,1,1-Trichloroethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 8 1,1,2-Trichloroethane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Trichloroethene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Trichlorofluoromethane <63.1 63.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 9 1,2,3-Trichloropropane <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 1,2,4-Trimethylbenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 10 1,3,5-Trimethylbenzene <15.8 15.8 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 Vinyl chloride <47.3 47.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 11 Xylenes, Total <47.3 47.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:28 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 100 80 - 120 11/06/15 07:11 11/06/15 18:28 1 13 Dibromofluoromethane (Surr) 91 75 - 125 11/06/15 07:11 11/06/15 18:28 1 Toluene-d8 (Surr) 102 80 - 120 11/06/15 07:11 11/06/15 18:28 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Benzo[a]anthracene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Benzo[a]pyrene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Benzidine <45200 45200 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Benzo[b]fluoranthene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Benzo[g,h,i]perylene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Benzo[k]fluoranthene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Acenaphthene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Acenaphthylene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Benzyl alcohol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Butyl benzyl phthalate <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Bis(2-chloroethyl)ether <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Bis(2-chloroethoxy)methane <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Bis(2-ethylhexyl) phthalate <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 bis (2-chloroisopropyl) ether <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 4-Bromophenyl phenyl ether <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Carbazole <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 4-Chloroaniline <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2-Chloronaphthalene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 4-Chlorophenyl phenyl ether <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Chrysene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Dibenz(a,h)anthracene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Dibenzofuran <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Di-n-butyl phthalate <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 1,2-Dichlorobenzene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 1,3-Dichlorobenzene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 1,4-Dichlorobenzene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 3,3'-Dichlorobenzidine <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10

TestAmerica Cedar Falls

Page 25 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E 10-13' Lab Sample ID: 310-68161-7 Date Collected: 11/02/15 16:00 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 73.0 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Dimethyl phthalate <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 6 2,4-Dinitrotoluene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2,6-Dinitrotoluene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 7 Fluorene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Hexachlorobenzene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 8 Hexachlorobutadiene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Hexachlorocyclopentadiene <9040 9040 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Hexachloroethane <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 9 Di-n-octyl phthalate <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Fluoranthene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 10 Indeno[1,2,3-cd]pyrene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Isophorone <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 11 2-Methylnaphthalene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Naphthalene <2740 2740 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 12 2-Nitroaniline <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 3-Nitroaniline <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 13 4-Nitroaniline <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Nitrobenzene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 14 N-Nitrosodiphenylamine <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 N-Nitrosodi-n-propylamine <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 15 N-Nitrosodimethylamine <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Phenanthrene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Pyrene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Pyridine <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 1,2,4-Trichlorobenzene <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Benzoic acid <9040 9040 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 4-Chloro-3-methylphenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2-Chlorophenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Total Cresols <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2,4-Dichlorophenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2,4-Dimethylphenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2,4-Dinitrophenol <9040 9040 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 4,6-Dinitro-2-methylphenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2-Methylphenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Methylphenol, 3 & 4 <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2-Nitrophenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 4-Nitrophenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Pentachlorophenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 Phenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2,4,5-Trichlorophenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10 2,4,6-Trichlorophenol <4520 4520 ug/Kg ☼ 11/05/15 11:51 11/06/15 17:54 10

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 46 15 - 90 11/05/15 11:51 11/06/15 17:54 10 Phenol-d6 (Surr) 52 20 - 90 11/05/15 11:51 11/06/15 17:54 10 Nitrobenzene-d5 (Surr) 40 15 - 90 11/05/15 11:51 11/06/15 17:54 10 2-Fluorobiphenyl (Surr) 49 20 - 90 11/05/15 11:51 11/06/15 17:54 10 2,4,6-Tribromophenol (Surr) 53 25 - 105 11/05/15 11:51 11/06/15 17:54 10 Terphenyl-d14 (Surr) 58 35 - 110 11/05/15 11:51 11/06/15 17:54 10

TestAmerica Cedar Falls

Page 26 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E 10-13' Lab Sample ID: 310-68161-7 Date Collected: 11/02/15 16:00 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 73.0 4 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Aldrin <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 alpha-BHC <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 6 beta-BHC <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 Chlordane (technical) <89.0 89.0 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 7 4,4'-DDD <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 4,4'-DDE <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 8 4,4'-DDT <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 delta-BHC <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 Dieldrin <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 9 Endosulfan I <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 Endosulfan II <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 10 Endosulfan sulfate <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 Endrin <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 11 Endrin aldehyde <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 gamma-BHC (Lindane) <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 12 Heptachlor <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 Heptachlor epoxide <22.6 22.6 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 13 Toxaphene <222 222 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:12 10 14 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 79 56 - 128 11/06/15 16:28 11/10/15 14:12 10 Tetrachloro-m-xylene 75 45 - 112 11/06/15 16:28 11/10/15 14:12 10 15

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0666 0.0666 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:13 1 PCB-1221 <0.0666 0.0666 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:13 1 PCB-1232 <0.0666 0.0666 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:13 1 PCB-1242 0.549 0.0666 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:13 1 PCB-1248 <0.0666 0.0666 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:13 1 PCB-1254 <0.0666 0.0666 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:13 1 PCB-1260 <0.0666 0.0666 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:13 1 PCB-1268 <0.0666 0.0666 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:13 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 71 40 - 120 11/05/15 11:56 11/09/15 13:13 1 Tetrachloro-m-xylene 70 10 - 105 11/05/15 11:56 11/09/15 13:13 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.92 9.92 mg/Kg 11/05/15 11:49 11/06/15 14:19 1 Gasoline <9.92 9.92 mg/Kg 11/05/15 11:49 11/06/15 14:19 1 Waste Oil 1020 9.92 mg/Kg 11/05/15 11:49 11/06/15 14:19 1 Total Extractable Hydrocarbons 1080 14.9 mg/Kg 11/05/15 11:49 11/06/15 14:19 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 44 40 - 135 11/05/15 11:49 11/06/15 14:19 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <5.03 5.03 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1

TestAmerica Cedar Falls

Page 27 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E 10-13' Lab Sample ID: 310-68161-7 Date Collected: 11/02/15 16:00 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 73.0 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Arsenic 6.19 4.02 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1 Beryllium <0.503 0.503 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1 6 Cadmium <1.01 1.01 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1 Chromium 17.6 1.01 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1 7 Copper 19.6 1.01 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1 Lead 31.3 5.03 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1 8 Nickel 18.0 2.51 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1 Selenium <7.54 7.54 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1 Silver <1.01 1.01 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:06 1 9 ☼ Zinc 115 1.01 mg/Kg 11/05/15 16:11 11/05/15 17:06 1 10 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Thallium <1.31 1.31 mg/Kg ☼ 11/05/15 16:24 11/06/15 18:27 4 12 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.0274 0.0274 mg/Kg ☼ 11/04/15 15:55 11/06/15 12:07 1 13 14 15

TestAmerica Cedar Falls

Page 28 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-14E 5-7' Lab Sample ID: 310-68161-8 3 Date Collected: 11/03/15 08:10 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <151 151 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Benzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 6 Bromobenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Bromochloromethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 7 Bromodichloromethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Bromoform <30.3 30.3 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 8 Bromomethane <60.5 60.5 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 2-Butanone (MEK) <151 151 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 9 n-Butylbenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 sec-Butylbenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 10 tert-Butylbenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Carbon disulfide <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Carbon tetrachloride <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 11 Chlorobenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Chlorodibromomethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 12 Chloroethane <60.5 60.5 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Chloroform <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 13 Chloromethane <60.5 60.5 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 2-Chlorotoluene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 14 4-Chlorotoluene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,2-Dibromo-3-Chloropropane <151 151 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 15 1,2-Dibromoethane (EDB) <151 151 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Dibromomethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,2-Dichlorobenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,3-Dichlorobenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,4-Dichlorobenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Dichlorodifluoromethane <45.4 45.4 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,1-Dichloroethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,2-Dichloroethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,1-Dichloroethene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 cis-1,2-Dichloroethene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 trans-1,2-Dichloroethene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,2-Dichloropropane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,3-Dichloropropane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 2,2-Dichloropropane <60.5 60.5 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,1-Dichloropropene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 cis-1,3-Dichloropropene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 trans-1,3-Dichloropropene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Ethylbenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Hexachlorobutadiene <75.7 75.7 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Hexane <75.7 75.7 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Isopropylbenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 p-Isopropyltoluene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Methylene Chloride <151 151 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Methyl tert-butyl ether <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Naphthalene <75.7 75.7 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 N-Propylbenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Styrene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,1,1,2-Tetrachloroethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1

TestAmerica Cedar Falls

Page 29 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-14E 5-7' Lab Sample ID: 310-68161-8 Date Collected: 11/03/15 08:10 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Tetrachloroethene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 6 Toluene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,2,3-Trichlorobenzene <75.7 75.7 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 7 1,2,4-Trichlorobenzene <75.7 75.7 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,1,1-Trichloroethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 8 1,1,2-Trichloroethane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Trichloroethene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Trichlorofluoromethane <60.5 60.5 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 9 1,2,3-Trichloropropane <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 1,2,4-Trimethylbenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 10 1,3,5-Trimethylbenzene <15.1 15.1 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 Vinyl chloride <45.4 45.4 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 11 Xylenes, Total <45.4 45.4 ug/Kg ☼ 11/06/15 07:11 11/06/15 18:53 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 95 80 - 120 11/06/15 07:11 11/06/15 18:53 1 13 Dibromofluoromethane (Surr) 92 75 - 125 11/06/15 07:11 11/06/15 18:53 1 Toluene-d8 (Surr) 101 80 - 120 11/06/15 07:11 11/06/15 18:53 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Benzo[a]anthracene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Benzo[a]pyrene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Benzidine <4080 4080 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Benzo[b]fluoranthene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Benzo[g,h,i]perylene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Benzo[k]fluoranthene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Acenaphthene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Acenaphthylene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Benzyl alcohol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Butyl benzyl phthalate <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Bis(2-chloroethyl)ether <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Bis(2-chloroethoxy)methane <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Bis(2-ethylhexyl) phthalate <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 bis (2-chloroisopropyl) ether <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 4-Bromophenyl phenyl ether <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Carbazole <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 4-Chloroaniline <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2-Chloronaphthalene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 4-Chlorophenyl phenyl ether <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Chrysene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Dibenz(a,h)anthracene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Dibenzofuran <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Di-n-butyl phthalate <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 1,2-Dichlorobenzene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 1,3-Dichlorobenzene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 1,4-Dichlorobenzene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 3,3'-Dichlorobenzidine <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1

TestAmerica Cedar Falls

Page 30 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-14E 5-7' Lab Sample ID: 310-68161-8 Date Collected: 11/03/15 08:10 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Dimethyl phthalate <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 6 2,4-Dinitrotoluene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2,6-Dinitrotoluene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 7 Fluorene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Hexachlorobenzene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 8 Hexachlorobutadiene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Hexachlorocyclopentadiene <816 816 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Hexachloroethane <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 9 Di-n-octyl phthalate <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Fluoranthene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 10 Indeno[1,2,3-cd]pyrene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Isophorone <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 11 2-Methylnaphthalene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Naphthalene <247 247 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 12 2-Nitroaniline <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 3-Nitroaniline <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 13 4-Nitroaniline <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Nitrobenzene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 14 N-Nitrosodiphenylamine <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 N-Nitrosodi-n-propylamine <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 15 N-Nitrosodimethylamine <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Phenanthrene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Pyrene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Pyridine <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 1,2,4-Trichlorobenzene <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Benzoic acid <816 816 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 4-Chloro-3-methylphenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2-Chlorophenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Total Cresols <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2,4-Dichlorophenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2,4-Dimethylphenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2,4-Dinitrophenol <816 816 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 4,6-Dinitro-2-methylphenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2-Methylphenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Methylphenol, 3 & 4 <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2-Nitrophenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 4-Nitrophenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Pentachlorophenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 Phenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2,4,5-Trichlorophenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1 2,4,6-Trichlorophenol <408 408 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:19 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 43 15 - 90 11/05/15 11:51 11/06/15 18:19 1 Phenol-d6 (Surr) 42 20 - 90 11/05/15 11:51 11/06/15 18:19 1 Nitrobenzene-d5 (Surr) 21 15 - 90 11/05/15 11:51 11/06/15 18:19 1 2-Fluorobiphenyl (Surr) 31 20 - 90 11/05/15 11:51 11/06/15 18:19 1 2,4,6-Tribromophenol (Surr) 33 25 - 105 11/05/15 11:51 11/06/15 18:19 1 Terphenyl-d14 (Surr) 37 35 - 110 11/05/15 11:51 11/06/15 18:19 1

TestAmerica Cedar Falls

Page 31 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-14E 5-7' Lab Sample ID: 310-68161-8 Date Collected: 11/03/15 08:10 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Aldrin <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 alpha-BHC <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 6 beta-BHC <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 Chlordane (technical) <8.24 8.24 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 7 4,4'-DDD <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 4,4'-DDE <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 8 4,4'-DDT <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 delta-BHC <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 Dieldrin <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 9 Endosulfan I <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 Endosulfan II <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 10 Endosulfan sulfate <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 Endrin <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 11 Endrin aldehyde <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 gamma-BHC (Lindane) <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 12 Heptachlor <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 Heptachlor epoxide <2.09 2.09 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 13 Toxaphene <20.5 20.5 ug/Kg ☼ 11/06/15 16:28 11/10/15 14:32 1 14 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 74 56 - 128 11/06/15 16:28 11/10/15 14:32 1 Tetrachloro-m-xylene 65 45 - 112 11/06/15 16:28 11/10/15 14:32 1 15

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0613 0.0613 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:25 1 PCB-1221 <0.0613 0.0613 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:25 1 PCB-1232 <0.0613 0.0613 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:25 1 PCB-1242 <0.0613 0.0613 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:25 1 PCB-1248 <0.0613 0.0613 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:25 1 PCB-1254 <0.0613 0.0613 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:25 1 PCB-1260 <0.0613 0.0613 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:25 1 PCB-1268 <0.0613 0.0613 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:25 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 67 40 - 120 11/05/15 11:56 11/09/15 13:25 1 Tetrachloro-m-xylene 71 10 - 105 11/05/15 11:56 11/09/15 13:25 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.74 9.74 mg/Kg 11/05/15 11:49 11/06/15 12:25 1 Gasoline <9.74 9.74 mg/Kg 11/05/15 11:49 11/06/15 12:25 1 Waste Oil <9.74 9.74 mg/Kg 11/05/15 11:49 11/06/15 12:25 1 Total Extractable Hydrocarbons <14.6 14.6 mg/Kg 11/05/15 11:49 11/06/15 12:25 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 50 40 - 135 11/05/15 11:49 11/06/15 12:25 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <4.91 4.91 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1

TestAmerica Cedar Falls

Page 32 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-14E 5-7' Lab Sample ID: 310-68161-8 Date Collected: 11/03/15 08:10 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Arsenic 7.16 3.92 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1 Beryllium <0.491 0.491 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1 6 Cadmium <0.981 0.981 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1 Chromium 17.3 0.981 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1 7 Copper 17.9 0.981 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1 Lead 11.7 4.91 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1 8 Nickel 22.0 2.45 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1 Selenium <7.36 7.36 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1 Silver <0.981 0.981 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:09 1 9 ☼ Zinc 71.6 0.981 mg/Kg 11/05/15 16:11 11/05/15 17:09 1 10 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Thallium <0.907 0.907 mg/Kg ☼ 11/05/15 16:24 11/06/15 18:31 4 12 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury 0.0353 0.0242 mg/Kg ☼ 11/04/15 15:55 11/06/15 12:09 1 13 14 15

TestAmerica Cedar Falls

Page 33 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 3 Date Collected: 11/02/15 15:00 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 80.8 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <146 146 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Benzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 6 Bromobenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Bromochloromethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 7 Bromodichloromethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Bromoform <29.1 29.1 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 8 Bromomethane <58.2 58.2 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 2-Butanone (MEK) <146 146 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 9 n-Butylbenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 sec-Butylbenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 10 tert-Butylbenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Carbon disulfide <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Carbon tetrachloride <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 11 Chlorobenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Chlorodibromomethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 12 Chloroethane <58.2 58.2 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Chloroform <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 13 Chloromethane <58.2 58.2 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 2-Chlorotoluene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 14 4-Chlorotoluene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,2-Dibromo-3-Chloropropane <146 146 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 15 1,2-Dibromoethane (EDB) <146 146 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Dibromomethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,2-Dichlorobenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,3-Dichlorobenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,4-Dichlorobenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Dichlorodifluoromethane <43.7 43.7 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,1-Dichloroethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,2-Dichloroethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,1-Dichloroethene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 cis-1,2-Dichloroethene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 trans-1,2-Dichloroethene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,2-Dichloropropane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,3-Dichloropropane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 2,2-Dichloropropane <58.2 58.2 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,1-Dichloropropene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 cis-1,3-Dichloropropene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 trans-1,3-Dichloropropene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Ethylbenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Hexachlorobutadiene <72.8 72.8 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Hexane <72.8 72.8 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Isopropylbenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 p-Isopropyltoluene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Methylene Chloride <146 146 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Methyl tert-butyl ether <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Naphthalene <72.8 72.8 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 N-Propylbenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Styrene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,1,1,2-Tetrachloroethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1

TestAmerica Cedar Falls

Page 34 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 Date Collected: 11/02/15 15:00 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.8 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Tetrachloroethene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 6 Toluene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,2,3-Trichlorobenzene <72.8 72.8 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 7 1,2,4-Trichlorobenzene <72.8 72.8 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,1,1-Trichloroethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 8 1,1,2-Trichloroethane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Trichloroethene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Trichlorofluoromethane <58.2 58.2 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 9 1,2,3-Trichloropropane <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 1,2,4-Trimethylbenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 10 1,3,5-Trimethylbenzene <14.6 14.6 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 Vinyl chloride <43.7 43.7 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 11 Xylenes, Total <43.7 43.7 ug/Kg ☼ 11/07/15 08:52 11/08/15 16:56 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 95 80 - 120 11/07/15 08:52 11/08/15 16:56 1 13 Dibromofluoromethane (Surr) 94 75 - 125 11/07/15 08:52 11/08/15 16:56 1 Toluene-d8 (Surr) 103 80 - 120 11/07/15 08:52 11/08/15 16:56 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Benzo[a]anthracene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Benzo[a]pyrene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Benzidine <39600 39600 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Benzo[b]fluoranthene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Benzo[g,h,i]perylene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Benzo[k]fluoranthene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Acenaphthene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Acenaphthylene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Benzyl alcohol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Butyl benzyl phthalate <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Bis(2-chloroethyl)ether <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Bis(2-chloroethoxy)methane <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Bis(2-ethylhexyl) phthalate <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 bis (2-chloroisopropyl) ether <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 4-Bromophenyl phenyl ether <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Carbazole <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 4-Chloroaniline <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2-Chloronaphthalene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 4-Chlorophenyl phenyl ether <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Chrysene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Dibenz(a,h)anthracene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Dibenzofuran <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Di-n-butyl phthalate <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 1,2-Dichlorobenzene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 1,3-Dichlorobenzene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 1,4-Dichlorobenzene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 3,3'-Dichlorobenzidine <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10

TestAmerica Cedar Falls

Page 35 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 Date Collected: 11/02/15 15:00 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.8 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Dimethyl phthalate <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 6 2,4-Dinitrotoluene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2,6-Dinitrotoluene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 7 Fluorene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Hexachlorobenzene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 8 Hexachlorobutadiene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Hexachlorocyclopentadiene <7910 7910 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Hexachloroethane <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 9 Di-n-octyl phthalate <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Fluoranthene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 10 Indeno[1,2,3-cd]pyrene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Isophorone <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 11 2-Methylnaphthalene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Naphthalene <2400 2400 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 12 2-Nitroaniline <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 3-Nitroaniline <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 13 4-Nitroaniline <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Nitrobenzene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 14 N-Nitrosodiphenylamine <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 N-Nitrosodi-n-propylamine <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 15 N-Nitrosodimethylamine <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Phenanthrene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Pyrene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Pyridine <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 1,2,4-Trichlorobenzene <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Benzoic acid <7910 7910 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 4-Chloro-3-methylphenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2-Chlorophenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Total Cresols <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2,4-Dichlorophenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2,4-Dimethylphenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2,4-Dinitrophenol <7910 7910 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 4,6-Dinitro-2-methylphenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2-Methylphenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Methylphenol, 3 & 4 <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2-Nitrophenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 4-Nitrophenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Pentachlorophenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 Phenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2,4,5-Trichlorophenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10 2,4,6-Trichlorophenol <3960 3960 ug/Kg ☼ 11/05/15 11:51 11/06/15 18:43 10

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 29 15 - 90 11/05/15 11:51 11/06/15 18:43 10 Phenol-d6 (Surr) 33 20 - 90 11/05/15 11:51 11/06/15 18:43 10 Nitrobenzene-d5 (Surr) 36 15 - 90 11/05/15 11:51 11/06/15 18:43 10 2-Fluorobiphenyl (Surr) 40 20 - 90 11/05/15 11:51 11/06/15 18:43 10 2,4,6-Tribromophenol (Surr) 30 25 - 105 11/05/15 11:51 11/06/15 18:43 10 Terphenyl-d14 (Surr) 44 35 - 110 11/05/15 11:51 11/06/15 18:43 10

TestAmerica Cedar Falls

Page 36 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 Date Collected: 11/02/15 15:00 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.8 4 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Aldrin <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 alpha-BHC <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 6 beta-BHC <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 Chlordane (technical) <82.8 82.8 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 7 4,4'-DDD <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 4,4'-DDE <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 8 4,4'-DDT <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 delta-BHC <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 Dieldrin <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 9 Endosulfan I <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 Endosulfan II <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 10 Endosulfan sulfate <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 Endrin <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 11 Endrin aldehyde <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 gamma-BHC (Lindane) <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 12 Heptachlor <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 Heptachlor epoxide <21.0 21.0 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 13 Toxaphene <206 206 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:10 10 14 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 206 X 56 - 128 11/06/15 16:28 11/09/15 16:10 10 Tetrachloro-m-xylene 93 45 - 112 11/06/15 16:28 11/09/15 16:10 10 15

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0617 0.0617 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:35 1 PCB-1221 <0.0617 0.0617 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:35 1 PCB-1232 <0.0617 0.0617 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:35 1 PCB-1242 <0.0617 0.0617 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:35 1 PCB-1248 <0.0617 0.0617 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:35 1 PCB-1254 <0.0617 0.0617 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:35 1 PCB-1260 <0.0617 0.0617 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:35 1 PCB-1268 <0.0617 0.0617 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:35 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 58 40 - 120 11/05/15 11:56 11/09/15 13:35 1 Tetrachloro-m-xylene 55 10 - 105 11/05/15 11:56 11/09/15 13:35 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.89 9.89 mg/Kg 11/05/15 11:49 11/06/15 14:04 1 Gasoline <9.89 9.89 mg/Kg 11/05/15 11:49 11/06/15 14:04 1 Waste Oil 40.7 9.89 mg/Kg 11/05/15 11:49 11/06/15 14:04 1 Total Extractable Hydrocarbons 46.1 14.8 mg/Kg 11/05/15 11:49 11/06/15 14:04 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 83 40 - 135 11/05/15 11:49 11/06/15 14:04 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <5.83 5.83 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1

TestAmerica Cedar Falls

Page 37 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 Date Collected: 11/02/15 15:00 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.8 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Arsenic 10.0 4.67 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1 Beryllium <0.583 0.583 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1 6 Cadmium <1.17 1.17 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1 Chromium 19.2 1.17 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1 7 Copper 22.0 1.17 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1 Lead 216 5.83 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1 8 Nickel 25.4 2.92 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1 Selenium <8.75 8.75 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1 Silver <1.17 1.17 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:11 1 9 ☼ Zinc 103 1.17 mg/Kg 11/05/15 16:11 11/05/15 17:11 1 10 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Thallium <0.912 0.912 mg/Kg ☼ 11/05/15 16:24 11/06/15 18:34 4 12 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury 0.0362 0.0242 mg/Kg ☼ 11/04/15 15:55 11/06/15 12:13 1 13 14 15

TestAmerica Cedar Falls

Page 38 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-19E 0-4' Lab Sample ID: 310-68161-10 3 Date Collected: 11/03/15 09:15 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <145 145 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Benzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 6 Bromobenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Bromochloromethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 7 Bromodichloromethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Bromoform <29.0 29.0 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 8 Bromomethane <58.0 58.0 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 2-Butanone (MEK) <145 145 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 9 n-Butylbenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 sec-Butylbenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 10 tert-Butylbenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Carbon disulfide <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Carbon tetrachloride <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 11 Chlorobenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Chlorodibromomethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 12 Chloroethane <58.0 58.0 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Chloroform <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 13 Chloromethane <58.0 58.0 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 2-Chlorotoluene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 14 4-Chlorotoluene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,2-Dibromo-3-Chloropropane <145 145 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 15 1,2-Dibromoethane (EDB) <145 145 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Dibromomethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,2-Dichlorobenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,3-Dichlorobenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,4-Dichlorobenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Dichlorodifluoromethane <43.5 43.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,1-Dichloroethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,2-Dichloroethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,1-Dichloroethene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 cis-1,2-Dichloroethene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 trans-1,2-Dichloroethene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,2-Dichloropropane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,3-Dichloropropane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 2,2-Dichloropropane <58.0 58.0 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,1-Dichloropropene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 cis-1,3-Dichloropropene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 trans-1,3-Dichloropropene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Ethylbenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Hexachlorobutadiene <72.5 72.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Hexane <72.5 72.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Isopropylbenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 p-Isopropyltoluene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Methylene Chloride <145 145 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Methyl tert-butyl ether <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Naphthalene <72.5 72.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 N-Propylbenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Styrene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,1,1,2-Tetrachloroethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1

TestAmerica Cedar Falls

Page 39 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-19E 0-4' Lab Sample ID: 310-68161-10 Date Collected: 11/03/15 09:15 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Tetrachloroethene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 6 Toluene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,2,3-Trichlorobenzene <72.5 72.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 7 1,2,4-Trichlorobenzene <72.5 72.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,1,1-Trichloroethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 8 1,1,2-Trichloroethane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Trichloroethene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Trichlorofluoromethane <58.0 58.0 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 9 1,2,3-Trichloropropane <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 1,2,4-Trimethylbenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 10 1,3,5-Trimethylbenzene <14.5 14.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 Vinyl chloride <43.5 43.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 11 Xylenes, Total <43.5 43.5 ug/Kg ☼ 11/07/15 08:52 11/08/15 17:21 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 96 80 - 120 11/07/15 08:52 11/08/15 17:21 1 13 Dibromofluoromethane (Surr) 91 75 - 125 11/07/15 08:52 11/08/15 17:21 1 Toluene-d8 (Surr) 98 80 - 120 11/07/15 08:52 11/08/15 17:21 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Benzo[a]anthracene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Benzo[a]pyrene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Benzidine <41000 41000 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Benzo[b]fluoranthene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Benzo[g,h,i]perylene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Benzo[k]fluoranthene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Acenaphthene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Acenaphthylene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Benzyl alcohol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Butyl benzyl phthalate <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Bis(2-chloroethyl)ether <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Bis(2-chloroethoxy)methane <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Bis(2-ethylhexyl) phthalate <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 bis (2-chloroisopropyl) ether <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 4-Bromophenyl phenyl ether <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Carbazole <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 4-Chloroaniline <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2-Chloronaphthalene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 4-Chlorophenyl phenyl ether <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Chrysene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Dibenz(a,h)anthracene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Dibenzofuran <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Di-n-butyl phthalate <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 1,2-Dichlorobenzene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 1,3-Dichlorobenzene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 1,4-Dichlorobenzene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 3,3'-Dichlorobenzidine <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10

TestAmerica Cedar Falls

Page 40 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-19E 0-4' Lab Sample ID: 310-68161-10 Date Collected: 11/03/15 09:15 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Dimethyl phthalate <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 6 2,4-Dinitrotoluene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2,6-Dinitrotoluene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 7 Fluorene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Hexachlorobenzene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 8 Hexachlorobutadiene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Hexachlorocyclopentadiene <8190 8190 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Hexachloroethane <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 9 Di-n-octyl phthalate <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Fluoranthene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 10 Indeno[1,2,3-cd]pyrene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Isophorone <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 11 2-Methylnaphthalene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Naphthalene <2480 2480 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 12 2-Nitroaniline <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 3-Nitroaniline <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 13 4-Nitroaniline <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Nitrobenzene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 14 N-Nitrosodiphenylamine <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 N-Nitrosodi-n-propylamine <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 15 N-Nitrosodimethylamine <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Phenanthrene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Pyrene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Pyridine <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 1,2,4-Trichlorobenzene <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Benzoic acid <8190 8190 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 4-Chloro-3-methylphenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2-Chlorophenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Total Cresols <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2,4-Dichlorophenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2,4-Dimethylphenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2,4-Dinitrophenol <8190 8190 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 4,6-Dinitro-2-methylphenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2-Methylphenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Methylphenol, 3 & 4 <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2-Nitrophenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 4-Nitrophenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Pentachlorophenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 Phenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2,4,5-Trichlorophenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10 2,4,6-Trichlorophenol <4100 4100 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:08 10

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 46 15 - 90 11/05/15 11:51 11/06/15 19:08 10 Phenol-d6 (Surr) 51 20 - 90 11/05/15 11:51 11/06/15 19:08 10 Nitrobenzene-d5 (Surr) 50 15 - 90 11/05/15 11:51 11/06/15 19:08 10 2-Fluorobiphenyl (Surr) 52 20 - 90 11/05/15 11:51 11/06/15 19:08 10 2,4,6-Tribromophenol (Surr) 44 25 - 105 11/05/15 11:51 11/06/15 19:08 10 Terphenyl-d14 (Surr) 57 35 - 110 11/05/15 11:51 11/06/15 19:08 10

TestAmerica Cedar Falls

Page 41 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-19E 0-4' Lab Sample ID: 310-68161-10 Date Collected: 11/03/15 09:15 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Aldrin <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 alpha-BHC <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 6 beta-BHC <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 Chlordane (technical) <83.2 83.2 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 7 4,4'-DDD <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 4,4'-DDE <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 8 4,4'-DDT <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 delta-BHC <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 Dieldrin <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 9 Endosulfan I <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 Endosulfan II <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 10 Endosulfan sulfate <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 Endrin <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 11 Endrin aldehyde <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 gamma-BHC (Lindane) <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 12 Heptachlor <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 Heptachlor epoxide <21.1 21.1 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 13 Toxaphene <207 207 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:31 10 14 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 93 56 - 128 11/06/15 16:28 11/09/15 16:31 10 Tetrachloro-m-xylene 69 45 - 112 11/06/15 16:28 11/09/15 16:31 10 15

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0615 0.0615 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:46 1 PCB-1221 <0.0615 0.0615 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:46 1 PCB-1232 <0.0615 0.0615 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:46 1 PCB-1242 <0.0615 0.0615 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:46 1 PCB-1248 <0.0615 0.0615 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:46 1 PCB-1254 <0.0615 0.0615 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:46 1 PCB-1260 <0.0615 0.0615 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:46 1 PCB-1268 <0.0615 0.0615 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:46 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 66 40 - 120 11/05/15 11:56 11/09/15 13:46 1 Tetrachloro-m-xylene 62 10 - 105 11/05/15 11:56 11/09/15 13:46 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.96 9.96 mg/Kg 11/05/15 11:49 11/06/15 14:47 1 Gasoline <9.96 9.96 mg/Kg 11/05/15 11:49 11/06/15 14:47 1 Waste Oil 204 9.96 mg/Kg 11/05/15 11:49 11/06/15 14:47 1 Total Extractable Hydrocarbons 271 14.9 mg/Kg 11/05/15 11:49 11/06/15 14:47 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 81 40 - 135 11/05/15 11:49 11/06/15 14:47 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <5.79 5.79 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1

TestAmerica Cedar Falls

Page 42 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-19E 0-4' Lab Sample ID: 310-68161-10 Date Collected: 11/03/15 09:15 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 80.5 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Arsenic 9.23 4.63 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1 Beryllium 0.639 0.579 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1 6 Cadmium <1.16 1.16 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1 Chromium 21.8 1.16 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1 7 Copper 21.2 1.16 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1 Lead 33.9 5.79 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1 8 Nickel 28.5 2.90 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1 Selenium <8.69 8.69 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1 Silver <1.16 1.16 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:13 1 9 ☼ Zinc 82.5 1.16 mg/Kg 11/05/15 16:11 11/05/15 17:13 1 10 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Thallium <0.976 0.976 mg/Kg ☼ 11/05/15 16:24 11/06/15 18:38 4 12 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.0231 0.0231 mg/Kg ☼ 11/04/15 15:55 11/06/15 12:15 1 13 14 15

TestAmerica Cedar Falls

Page 43 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-20E 0-4' Lab Sample ID: 310-68161-11 3 Date Collected: 11/02/15 15:20 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 85.2 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <126 F1 126 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Benzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 6 Bromobenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Bromochloromethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 7 Bromodichloromethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Bromoform <25.2 25.2 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 8 Bromomethane <50.5 50.5 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 2-Butanone (MEK) <126 126 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 9 n-Butylbenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 sec-Butylbenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 10 tert-Butylbenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Carbon disulfide <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Carbon tetrachloride <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 11 Chlorobenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Chlorodibromomethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 12 Chloroethane <50.5 50.5 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Chloroform <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 13 Chloromethane <50.5 50.5 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 2-Chlorotoluene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 14 4-Chlorotoluene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,2-Dibromo-3-Chloropropane <126 126 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 15 1,2-Dibromoethane (EDB) <126 126 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Dibromomethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,2-Dichlorobenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,3-Dichlorobenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,4-Dichlorobenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Dichlorodifluoromethane <37.8 37.8 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,1-Dichloroethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,2-Dichloroethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,1-Dichloroethene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 cis-1,2-Dichloroethene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 trans-1,2-Dichloroethene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,2-Dichloropropane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,3-Dichloropropane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 2,2-Dichloropropane <50.5 50.5 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,1-Dichloropropene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 cis-1,3-Dichloropropene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 trans-1,3-Dichloropropene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Ethylbenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Hexachlorobutadiene <63.1 63.1 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Hexane <63.1 63.1 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Isopropylbenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 p-Isopropyltoluene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Methylene Chloride <126 126 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Methyl tert-butyl ether <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Naphthalene <63.1 63.1 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 N-Propylbenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Styrene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,1,1,2-Tetrachloroethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1

TestAmerica Cedar Falls

Page 44 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-20E 0-4' Lab Sample ID: 310-68161-11 Date Collected: 11/02/15 15:20 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 85.2 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Tetrachloroethene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 6 Toluene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,2,3-Trichlorobenzene <63.1 63.1 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 7 1,2,4-Trichlorobenzene <63.1 63.1 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,1,1-Trichloroethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 8 1,1,2-Trichloroethane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Trichloroethene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Trichlorofluoromethane <50.5 50.5 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 9 1,2,3-Trichloropropane <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 1,2,4-Trimethylbenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 10 1,3,5-Trimethylbenzene <12.6 12.6 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 Vinyl chloride <37.8 37.8 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 11 Xylenes, Total <37.8 37.8 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:32 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 99 80 - 120 11/08/15 10:37 11/08/15 23:32 1 13 Dibromofluoromethane (Surr) 94 75 - 125 11/08/15 10:37 11/08/15 23:32 1 Toluene-d8 (Surr) 98 80 - 120 11/08/15 10:37 11/08/15 23:32 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Benzo[a]anthracene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Benzo[a]pyrene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Benzidine <3820 3820 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Benzo[b]fluoranthene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Benzo[g,h,i]perylene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Benzo[k]fluoranthene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Acenaphthene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Acenaphthylene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Benzyl alcohol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Butyl benzyl phthalate <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Bis(2-chloroethyl)ether <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Bis(2-chloroethoxy)methane <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Bis(2-ethylhexyl) phthalate <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 bis (2-chloroisopropyl) ether <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 4-Bromophenyl phenyl ether <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Carbazole <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 4-Chloroaniline <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2-Chloronaphthalene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 4-Chlorophenyl phenyl ether <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Chrysene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Dibenz(a,h)anthracene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Dibenzofuran <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Di-n-butyl phthalate <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 1,2-Dichlorobenzene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 1,3-Dichlorobenzene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 1,4-Dichlorobenzene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 3,3'-Dichlorobenzidine <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1

TestAmerica Cedar Falls

Page 45 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-20E 0-4' Lab Sample ID: 310-68161-11 Date Collected: 11/02/15 15:20 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 85.2 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Dimethyl phthalate <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 6 2,4-Dinitrotoluene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2,6-Dinitrotoluene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 7 Fluorene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Hexachlorobenzene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 8 Hexachlorobutadiene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Hexachlorocyclopentadiene <765 765 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Hexachloroethane <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 9 Di-n-octyl phthalate <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Fluoranthene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 10 Indeno[1,2,3-cd]pyrene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Isophorone <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 11 2-Methylnaphthalene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Naphthalene <232 232 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 12 2-Nitroaniline <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 3-Nitroaniline <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 13 4-Nitroaniline <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Nitrobenzene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 14 N-Nitrosodiphenylamine <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 N-Nitrosodi-n-propylamine <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 15 N-Nitrosodimethylamine <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Phenanthrene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Pyrene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Pyridine <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 1,2,4-Trichlorobenzene <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Benzoic acid <765 765 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 4-Chloro-3-methylphenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2-Chlorophenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Total Cresols <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2,4-Dichlorophenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2,4-Dimethylphenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2,4-Dinitrophenol <765 765 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 4,6-Dinitro-2-methylphenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2-Methylphenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Methylphenol, 3 & 4 <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2-Nitrophenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 4-Nitrophenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Pentachlorophenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 Phenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2,4,5-Trichlorophenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1 2,4,6-Trichlorophenol <382 382 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:32 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 19 15 - 90 11/05/15 11:51 11/06/15 19:32 1 Phenol-d6 (Surr) 22 20 - 90 11/05/15 11:51 11/06/15 19:32 1 Nitrobenzene-d5 (Surr) 26 15 - 90 11/05/15 11:51 11/06/15 19:32 1 2-Fluorobiphenyl (Surr) 25 20 - 90 11/05/15 11:51 11/06/15 19:32 1 2,4,6-Tribromophenol (Surr) 27 25 - 105 11/05/15 11:51 11/06/15 19:32 1 Terphenyl-d14 (Surr) 36 35 - 110 11/05/15 11:51 11/06/15 19:32 1

TestAmerica Cedar Falls

Page 46 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-20E 0-4' Lab Sample ID: 310-68161-11 Date Collected: 11/02/15 15:20 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 85.2 4 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Aldrin <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 alpha-BHC <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 6 beta-BHC <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 Chlordane (technical) <7.83 7.83 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 7 4,4'-DDD <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 4,4'-DDE <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 8 4,4'-DDT <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 delta-BHC <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 Dieldrin <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 9 Endosulfan I <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 Endosulfan II <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 10 Endosulfan sulfate <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 Endrin <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 11 Endrin aldehyde <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 gamma-BHC (Lindane) <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 12 Heptachlor <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 Heptachlor epoxide <1.99 1.99 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 13 Toxaphene <19.5 19.5 ug/Kg ☼ 11/06/15 16:28 11/09/15 16:51 1 14 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 106 56 - 128 11/06/15 16:28 11/09/15 16:51 1 Tetrachloro-m-xylene 87 45 - 112 11/06/15 16:28 11/09/15 16:51 1 15

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0575 0.0575 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:57 1 PCB-1221 <0.0575 0.0575 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:57 1 PCB-1232 <0.0575 0.0575 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:57 1 PCB-1242 <0.0575 0.0575 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:57 1 PCB-1248 <0.0575 0.0575 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:57 1 PCB-1254 <0.0575 0.0575 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:57 1 PCB-1260 <0.0575 0.0575 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:57 1 PCB-1268 <0.0575 0.0575 mg/Kg ☼ 11/05/15 11:56 11/09/15 13:57 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 48 40 - 120 11/05/15 11:56 11/09/15 13:57 1 Tetrachloro-m-xylene 41 10 - 105 11/05/15 11:56 11/09/15 13:57 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.83 9.83 mg/Kg 11/05/15 11:49 11/06/15 12:39 1 Gasoline <9.83 9.83 mg/Kg 11/05/15 11:49 11/06/15 12:39 1 Waste Oil <9.83 9.83 mg/Kg 11/05/15 11:49 11/06/15 12:39 1 Total Extractable Hydrocarbons 14.9 Z 14.7 mg/Kg 11/05/15 11:49 11/06/15 12:39 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 87 40 - 135 11/05/15 11:49 11/06/15 12:39 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <5.19 5.19 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1

TestAmerica Cedar Falls

Page 47 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-20E 0-4' Lab Sample ID: 310-68161-11 Date Collected: 11/02/15 15:20 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 85.2 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Arsenic <4.16 4.16 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1 Beryllium <0.519 0.519 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1 6 Cadmium <1.04 1.04 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1 Chromium 19.4 1.04 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1 7 Copper 16.7 1.04 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1 Lead 12.2 5.19 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1 8 Nickel 26.3 2.60 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1 Selenium <7.79 7.79 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1 Silver <1.04 1.04 mg/Kg ☼ 11/05/15 16:11 11/05/15 17:15 1 9 ☼ Zinc 70.7 1.04 mg/Kg 11/05/15 16:11 11/05/15 17:15 1 10 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Thallium <1.05 1.05 mg/Kg ☼ 11/05/15 16:24 11/06/15 18:42 4 12 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.0231 0.0231 mg/Kg ☼ 11/04/15 15:55 11/06/15 12:17 1 13 14 15

TestAmerica Cedar Falls

Page 48 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-22E 1-2.5' Lab Sample ID: 310-68161-12 3 Date Collected: 11/02/15 13:55 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 87.3 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <127 127 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Benzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 6 Bromobenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Bromochloromethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 7 Bromodichloromethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Bromoform <25.3 25.3 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 8 Bromomethane <50.7 50.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 2-Butanone (MEK) <127 127 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 9 n-Butylbenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 sec-Butylbenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 10 tert-Butylbenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Carbon disulfide <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Carbon tetrachloride <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 11 Chlorobenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Chlorodibromomethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 12 Chloroethane <50.7 50.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Chloroform <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 13 Chloromethane <50.7 50.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 2-Chlorotoluene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 14 4-Chlorotoluene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,2-Dibromo-3-Chloropropane <127 127 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 15 1,2-Dibromoethane (EDB) <127 127 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Dibromomethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,2-Dichlorobenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,3-Dichlorobenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,4-Dichlorobenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Dichlorodifluoromethane <38.0 38.0 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,1-Dichloroethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,2-Dichloroethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,1-Dichloroethene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 cis-1,2-Dichloroethene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 trans-1,2-Dichloroethene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,2-Dichloropropane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,3-Dichloropropane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 2,2-Dichloropropane <50.7 50.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,1-Dichloropropene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 cis-1,3-Dichloropropene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 trans-1,3-Dichloropropene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Ethylbenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Hexachlorobutadiene <63.3 63.3 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Hexane <63.3 63.3 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Isopropylbenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 p-Isopropyltoluene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Methylene Chloride <127 127 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Methyl tert-butyl ether <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Naphthalene <63.3 63.3 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 N-Propylbenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Styrene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,1,1,2-Tetrachloroethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1

TestAmerica Cedar Falls

Page 49 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-22E 1-2.5' Lab Sample ID: 310-68161-12 Date Collected: 11/02/15 13:55 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 87.3 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Tetrachloroethene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 6 Toluene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,2,3-Trichlorobenzene <63.3 63.3 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 7 1,2,4-Trichlorobenzene <63.3 63.3 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,1,1-Trichloroethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 8 1,1,2-Trichloroethane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Trichloroethene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Trichlorofluoromethane <50.7 50.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 9 1,2,3-Trichloropropane <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 1,2,4-Trimethylbenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 10 1,3,5-Trimethylbenzene <12.7 12.7 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 Vinyl chloride <38.0 38.0 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 11 Xylenes, Total <38.0 38.0 ug/Kg ☼ 11/08/15 10:37 11/08/15 23:57 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 88 80 - 120 11/08/15 10:37 11/08/15 23:57 1 13 Dibromofluoromethane (Surr) 96 75 - 125 11/08/15 10:37 11/08/15 23:57 1 Toluene-d8 (Surr) 106 80 - 120 11/08/15 10:37 11/08/15 23:57 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Benzo[a]anthracene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Benzo[a]pyrene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Benzidine <186000 186000 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Benzo[b]fluoranthene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Benzo[g,h,i]perylene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Benzo[k]fluoranthene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Acenaphthene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Acenaphthylene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Benzyl alcohol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Butyl benzyl phthalate <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Bis(2-chloroethyl)ether <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Bis(2-chloroethoxy)methane <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Bis(2-ethylhexyl) phthalate <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 bis (2-chloroisopropyl) ether <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 4-Bromophenyl phenyl ether <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Carbazole <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 4-Chloroaniline <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2-Chloronaphthalene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 4-Chlorophenyl phenyl ether <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Chrysene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Dibenz(a,h)anthracene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Dibenzofuran <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Di-n-butyl phthalate <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 1,2-Dichlorobenzene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 1,3-Dichlorobenzene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 1,4-Dichlorobenzene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 3,3'-Dichlorobenzidine <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50

TestAmerica Cedar Falls

Page 50 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-22E 1-2.5' Lab Sample ID: 310-68161-12 Date Collected: 11/02/15 13:55 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 87.3 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Dimethyl phthalate <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 6 2,4-Dinitrotoluene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2,6-Dinitrotoluene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 7 Fluorene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Hexachlorobenzene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 8 Hexachlorobutadiene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Hexachlorocyclopentadiene <37300 37300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Hexachloroethane <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 9 Di-n-octyl phthalate <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Fluoranthene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 10 Indeno[1,2,3-cd]pyrene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Isophorone <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 11 2-Methylnaphthalene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Naphthalene <11300 11300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 12 2-Nitroaniline <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 3-Nitroaniline <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 13 4-Nitroaniline <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Nitrobenzene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 14 N-Nitrosodiphenylamine <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 N-Nitrosodi-n-propylamine <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 15 N-Nitrosodimethylamine <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Phenanthrene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Pyrene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Pyridine <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 1,2,4-Trichlorobenzene <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Benzoic acid <37300 37300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 4-Chloro-3-methylphenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2-Chlorophenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Total Cresols <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2,4-Dichlorophenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2,4-Dimethylphenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2,4-Dinitrophenol <37300 37300 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 4,6-Dinitro-2-methylphenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2-Methylphenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Methylphenol, 3 & 4 <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2-Nitrophenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 4-Nitrophenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Pentachlorophenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 Phenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2,4,5-Trichlorophenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50 2,4,6-Trichlorophenol <18600 18600 ug/Kg ☼ 11/05/15 11:51 11/06/15 19:56 50

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 30 15 - 90 11/05/15 11:51 11/06/15 19:56 50 Phenol-d6 (Surr) 33 20 - 90 11/05/15 11:51 11/06/15 19:56 50 Nitrobenzene-d5 (Surr) 30 15 - 90 11/05/15 11:51 11/06/15 19:56 50 2-Fluorobiphenyl (Surr) 36 20 - 90 11/05/15 11:51 11/06/15 19:56 50 2,4,6-Tribromophenol (Surr) 30 25 - 105 11/05/15 11:51 11/06/15 19:56 50 Terphenyl-d14 (Surr) 32 X 35 - 110 11/05/15 11:51 11/06/15 19:56 50

TestAmerica Cedar Falls

Page 51 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-22E 1-2.5' Lab Sample ID: 310-68161-12 Date Collected: 11/02/15 13:55 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 87.3 4 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Aldrin <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 alpha-BHC <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 6 beta-BHC <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 Chlordane (technical) <152 152 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 7 4,4'-DDD <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 4,4'-DDE <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 8 4,4'-DDT <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 delta-BHC <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 Dieldrin <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 9 Endosulfan I <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 Endosulfan II <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 10 Endosulfan sulfate <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 Endrin <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 11 Endrin aldehyde <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 gamma-BHC (Lindane) <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 12 Heptachlor <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 Heptachlor epoxide <38.7 38.7 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 13 Toxaphene <380 380 ug/Kg ☼ 11/06/15 16:28 11/09/15 17:32 20 14 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 104 56 - 128 11/06/15 16:28 11/09/15 17:32 20 Tetrachloro-m-xylene 106 45 - 112 11/06/15 16:28 11/09/15 17:32 20 15

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0566 0.0566 mg/Kg ☼ 11/05/15 11:56 11/09/15 14:07 1 PCB-1221 <0.0566 0.0566 mg/Kg ☼ 11/05/15 11:56 11/09/15 14:07 1 PCB-1232 <0.0566 0.0566 mg/Kg ☼ 11/05/15 11:56 11/09/15 14:07 1 PCB-1242 <0.0566 0.0566 mg/Kg ☼ 11/05/15 11:56 11/09/15 14:07 1 PCB-1248 <0.0566 0.0566 mg/Kg ☼ 11/05/15 11:56 11/09/15 14:07 1 PCB-1254 0.0693 0.0566 mg/Kg ☼ 11/05/15 11:56 11/09/15 14:07 1 PCB-1260 <0.0566 0.0566 mg/Kg ☼ 11/05/15 11:56 11/09/15 14:07 1 PCB-1268 <0.0566 0.0566 mg/Kg ☼ 11/05/15 11:56 11/09/15 14:07 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 71 40 - 120 11/05/15 11:56 11/09/15 14:07 1 Tetrachloro-m-xylene 63 10 - 105 11/05/15 11:56 11/09/15 14:07 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.95 9.95 mg/Kg 11/05/15 11:49 11/06/15 14:33 1 Gasoline <9.95 9.95 mg/Kg 11/05/15 11:49 11/06/15 14:33 1 Waste Oil 392 9.95 mg/Kg 11/05/15 11:49 11/06/15 14:33 1 Total Extractable Hydrocarbons 609 14.9 mg/Kg 11/05/15 11:49 11/06/15 14:33 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 79 40 - 135 11/05/15 11:49 11/06/15 14:33 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <21.2 21.2 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5

TestAmerica Cedar Falls

Page 52 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-22E 1-2.5' Lab Sample ID: 310-68161-12 Date Collected: 11/02/15 13:55 Matrix: Soil 3 Date Received: 11/04/15 09:35 Percent Solids: 87.3 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Arsenic <17.0 17.0 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5 Beryllium <2.12 2.12 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5 6 Cadmium <4.24 4.24 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5 Chromium 13.4 4.24 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5 7 Copper 11.5 4.24 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5 Lead 26.7 21.2 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5 8 Nickel 15.0 10.6 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5 Selenium <31.8 31.8 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5 Silver <4.24 4.24 mg/Kg ☼ 11/05/15 16:11 11/05/15 18:55 5 9 ☼ Zinc 76.2 4.24 mg/Kg 11/05/15 16:11 11/05/15 18:55 5 10 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Thallium <1.04 1.04 mg/Kg ☼ 11/05/15 16:24 11/06/15 18:46 4 12 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury 0.0443 0.0205 mg/Kg ☼ 11/04/15 15:55 11/06/15 12:18 1 13 14 15

TestAmerica Cedar Falls

Page 53 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E Lab Sample ID: 310-68161-13 3 Date Collected: 11/03/15 11:40 Matrix: Ground Water Date Received: 11/04/15 09:35 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <10.0 10.0 ug/L 11/06/15 18:20 1 Benzene <0.500 0.500 ug/L 11/06/15 18:20 1 6 Bromobenzene <1.00 1.00 ug/L 11/06/15 18:20 1 Bromochloromethane <5.00 5.00 ug/L 11/06/15 18:20 1 7 Bromodichloromethane <1.00 1.00 ug/L 11/06/15 18:20 1 Bromoform <5.00 5.00 ug/L 11/06/15 18:20 1 8 Bromomethane <4.00 4.00 ug/L 11/06/15 18:20 1 2-Butanone (MEK) <10.0 10.0 ug/L 11/06/15 18:20 1 9 n-Butylbenzene <1.00 1.00 ug/L 11/06/15 18:20 1 sec-Butylbenzene <1.00 1.00 ug/L 11/06/15 18:20 1 10 tert-Butylbenzene <1.00 1.00 ug/L 11/06/15 18:20 1 Carbon disulfide <1.00 1.00 ug/L 11/06/15 18:20 1 Carbon tetrachloride <2.00 2.00 ug/L 11/06/15 18:20 1 11 Chlorobenzene <1.00 1.00 ug/L 11/06/15 18:20 1 Chlorodibromomethane <5.00 5.00 ug/L 11/06/15 18:20 1 12 Chloroethane <4.00 4.00 ug/L 11/06/15 18:20 1 Chloroform <1.00 1.00 ug/L 11/06/15 18:20 1 13 Chloromethane <3.00 3.00 ug/L 11/06/15 18:20 1 2-Chlorotoluene <1.00 1.00 ug/L 11/06/15 18:20 1 14 4-Chlorotoluene <1.00 1.00 ug/L 11/06/15 18:20 1 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/06/15 18:20 1 15 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/06/15 18:20 1 Dibromomethane <1.00 1.00 ug/L 11/06/15 18:20 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 18:20 1 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 18:20 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 18:20 1 Dichlorodifluoromethane <3.00 3.00 ug/L 11/06/15 18:20 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/06/15 18:20 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/06/15 18:20 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/06/15 18:20 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/06/15 18:20 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/06/15 18:20 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/06/15 18:20 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/06/15 18:20 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/06/15 18:20 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/06/15 18:20 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/06/15 18:20 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/06/15 18:20 1 Ethylbenzene <1.00 1.00 ug/L 11/06/15 18:20 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/06/15 18:20 1 Hexane <1.00 1.00 ug/L 11/06/15 18:20 1 Isopropylbenzene <1.00 1.00 ug/L 11/06/15 18:20 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/06/15 18:20 1 Methylene Chloride <5.00 5.00 ug/L 11/06/15 18:20 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/06/15 18:20 1 Naphthalene <5.00 5.00 ug/L 11/06/15 18:20 1 N-Propylbenzene <1.00 1.00 ug/L 11/06/15 18:20 1 Styrene <1.00 1.00 ug/L 11/06/15 18:20 1 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/06/15 18:20 1

TestAmerica Cedar Falls

Page 54 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E Lab Sample ID: 310-68161-13 Date Collected: 11/03/15 11:40 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/06/15 18:20 1 Tetrachloroethene <1.00 1.00 ug/L 11/06/15 18:20 1 6 Toluene <1.00 1.00 ug/L 11/06/15 18:20 1 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/06/15 18:20 1 7 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/06/15 18:20 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/06/15 18:20 1 8 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/06/15 18:20 1 Trichloroethene <1.00 1.00 ug/L 11/06/15 18:20 1 Trichlorofluoromethane <4.00 4.00 ug/L 11/06/15 18:20 1 9 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/06/15 18:20 1 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/06/15 18:20 1 10 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/06/15 18:20 1 Vinyl chloride <1.00 1.00 ug/L 11/06/15 18:20 1 11 Xylenes, Total <3.00 3.00 ug/L 11/06/15 18:20 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 99 75 - 120 11/06/15 18:20 1 13 Dibromofluoromethane (Surr) 91 75 - 120 11/06/15 18:20 1 Toluene-d8 (Surr) 108 80 - 120 11/06/15 18:20 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Benzo[a]anthracene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Benzo[a]pyrene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Benzidine <106 106 ug/L 11/05/15 11:12 11/09/15 19:23 1 Benzo[b]fluoranthene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Benzo[g,h,i]perylene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Benzo[k]fluoranthene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Acenaphthene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Acenaphthylene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Benzyl alcohol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Butyl benzyl phthalate <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Bis(2-chloroethyl)ether <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Bis(2-chloroethoxy)methane <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Bis(2-ethylhexyl) phthalate 11.2 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 bis (2-chloroisopropyl) ether <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 4-Bromophenyl phenyl ether <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Carbazole <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 4-Chloroaniline <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2-Chloronaphthalene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 4-Chlorophenyl phenyl ether <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Chrysene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Dibenz(a,h)anthracene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Dibenzofuran <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Di-n-butyl phthalate <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 1,2-Dichlorobenzene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 1,3-Dichlorobenzene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 1,4-Dichlorobenzene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 3,3'-Dichlorobenzidine <53.2 53.2 ug/L 11/05/15 11:12 11/09/15 19:23 1

TestAmerica Cedar Falls

Page 55 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E Lab Sample ID: 310-68161-13 Date Collected: 11/03/15 11:40 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Dimethyl phthalate <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 6 2,4-Dinitrotoluene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2,6-Dinitrotoluene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 7 Fluorene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Hexachlorobenzene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 8 Hexachlorobutadiene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Hexachlorocyclopentadiene <21.3 21.3 ug/L 11/05/15 11:12 11/09/15 19:23 1 Hexachloroethane <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 9 Di-n-octyl phthalate <21.3 21.3 ug/L 11/05/15 11:12 11/09/15 19:23 1 Fluoranthene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 10 Indeno[1,2,3-cd]pyrene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Isophorone <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 11 2-Methylnaphthalene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Naphthalene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 12 2-Nitroaniline <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 3-Nitroaniline <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 13 4-Nitroaniline <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Nitrobenzene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 14 N-Nitrosodiphenylamine <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 N-Nitrosodi-n-propylamine <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 15 N-Nitrosodimethylamine <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Phenanthrene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Pyrene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Pyridine <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 1,2,4-Trichlorobenzene <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Benzoic acid <106 106 ug/L 11/05/15 11:12 11/09/15 19:23 1 4-Chloro-3-methylphenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2-Chlorophenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Total Cresols <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2,4-Dichlorophenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2,4-Dimethylphenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2,4-Dinitrophenol <21.3 21.3 ug/L 11/05/15 11:12 11/09/15 19:23 1 4,6-Dinitro-2-methylphenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2-Methylphenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Methylphenol, 3 & 4 <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2-Nitrophenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 4-Nitrophenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Pentachlorophenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 Phenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2,4,5-Trichlorophenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1 2,4,6-Trichlorophenol <10.6 10.6 ug/L 11/05/15 11:12 11/09/15 19:23 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 27 15 - 50 11/05/15 11:12 11/09/15 19:23 1 Phenol-d6 (Surr) 20 10 - 35 11/05/15 11:12 11/09/15 19:23 1 Nitrobenzene-d5 (Surr) 48 25 - 80 11/05/15 11:12 11/09/15 19:23 1 2-Fluorobiphenyl (Surr) 48 25 - 80 11/05/15 11:12 11/09/15 19:23 1 2,4,6-Tribromophenol (Surr) 52 25 - 100 11/05/15 11:12 11/09/15 19:23 1 Terphenyl-d14 (Surr) 75 30 - 105 11/05/15 11:12 11/09/15 19:23 1

TestAmerica Cedar Falls

Page 56 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E Lab Sample ID: 310-68161-13 Date Collected: 11/03/15 11:40 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Aldrin <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 alpha-BHC <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 6 beta-BHC <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 Chlordane (technical) <2.13 2.13 ug/L 11/05/15 11:30 11/09/15 11:59 1 7 4,4'-DDD <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 4,4'-DDE <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 8 4,4'-DDT <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 delta-BHC <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 Dieldrin <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 9 Endosulfan I <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 Endosulfan II <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 10 Endosulfan sulfate <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 Endrin <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 11 Endrin aldehyde <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 gamma-BHC (Lindane) <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 12 Heptachlor <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 Heptachlor epoxide <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 13 Methoxychlor <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 11:59 1 Toxaphene <2.13 2.13 ug/L 11/05/15 11:30 11/09/15 11:59 1 14

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 39 30 - 125 11/05/15 11:30 11/09/15 11:59 1 15 Tetrachloro-m-xylene 39 15 - 115 11/05/15 11:30 11/09/15 11:59 1

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.870 0.870 ug/L 11/05/15 11:31 11/09/15 11:30 1 PCB-1221 <0.870 0.870 ug/L 11/05/15 11:31 11/09/15 11:30 1 PCB-1232 <0.870 0.870 ug/L 11/05/15 11:31 11/09/15 11:30 1 PCB-1242 <0.870 0.870 ug/L 11/05/15 11:31 11/09/15 11:30 1 PCB-1248 <0.870 0.870 ug/L 11/05/15 11:31 11/09/15 11:30 1 PCB-1254 <0.870 0.870 ug/L 11/05/15 11:31 11/09/15 11:30 1 PCB-1260 <0.870 0.870 ug/L 11/05/15 11:31 11/09/15 11:30 1 PCB-1268 <0.870 0.870 ug/L 11/05/15 11:31 11/09/15 11:30 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 160 E X 25 - 115 11/05/15 11:31 11/09/15 11:30 1 Tetrachloro-m-xylene 169 X 20 - 90 11/05/15 11:31 11/09/15 11:30 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <278 278 ug/L 11/05/15 11:03 11/06/15 15:10 1 Gasoline <278 278 ug/L 11/05/15 11:03 11/06/15 15:10 1 Waste Oil <278 278 ug/L 11/05/15 11:03 11/06/15 15:10 1 Total Extractable Hydrocarbons <463 463 ug/L 11/05/15 11:03 11/06/15 15:10 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 111 45 - 140 11/05/15 11:03 11/06/15 15:10 1

TestAmerica Cedar Falls

Page 57 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E Lab Sample ID: 310-68161-13 Date Collected: 11/03/15 11:40 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 6020A - Metals (ICP/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Antimony <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 18:57 1 Arsenic 7.64 2.00 ug/L 11/05/15 16:54 11/09/15 18:57 1 6 Beryllium <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 18:57 1 Cadmium <0.500 0.500 ug/L 11/05/15 16:54 11/09/15 18:57 1 7 Chromium 7.57 5.00 ug/L 11/05/15 16:54 11/09/15 18:57 1 Copper 3.87 2.00 ug/L 11/05/15 16:54 11/09/15 18:57 1 8 Lead 3.56 0.500 ug/L 11/05/15 16:54 11/09/15 18:57 1 Nickel 9.76 5.00 ug/L 11/05/15 16:54 11/09/15 18:57 1 Selenium <5.00 5.00 ug/L 11/05/15 16:54 11/09/15 18:57 1 9 Silver <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 18:57 1 Thallium <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 18:57 1 10 Zinc 13.3 10.0 ug/L 11/05/15 16:54 11/09/15 18:57 1 11 Method: 7470A - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 12 Mercury <0.000200 0.000200 mg/L 11/06/15 13:31 11/09/15 11:38 1 13 14 15

TestAmerica Cedar Falls

Page 58 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E Lab Sample ID: 310-68161-14 3 Date Collected: 11/03/15 14:10 Matrix: Ground Water Date Received: 11/04/15 09:35 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <10.0 10.0 ug/L 11/06/15 18:42 1 Benzene <0.500 0.500 ug/L 11/06/15 18:42 1 6 Bromobenzene <1.00 1.00 ug/L 11/06/15 18:42 1 Bromochloromethane <5.00 5.00 ug/L 11/06/15 18:42 1 7 Bromodichloromethane <1.00 1.00 ug/L 11/06/15 18:42 1 Bromoform <5.00 5.00 ug/L 11/06/15 18:42 1 8 Bromomethane <4.00 4.00 ug/L 11/06/15 18:42 1 2-Butanone (MEK) <10.0 10.0 ug/L 11/06/15 18:42 1 9 n-Butylbenzene <1.00 1.00 ug/L 11/06/15 18:42 1 sec-Butylbenzene <1.00 1.00 ug/L 11/06/15 18:42 1 10 tert-Butylbenzene <1.00 1.00 ug/L 11/06/15 18:42 1 Carbon disulfide <1.00 1.00 ug/L 11/06/15 18:42 1 Carbon tetrachloride <2.00 2.00 ug/L 11/06/15 18:42 1 11 Chlorobenzene <1.00 1.00 ug/L 11/06/15 18:42 1 Chlorodibromomethane <5.00 5.00 ug/L 11/06/15 18:42 1 12 Chloroethane <4.00 4.00 ug/L 11/06/15 18:42 1 Chloroform <1.00 1.00 ug/L 11/06/15 18:42 1 13 Chloromethane <3.00 3.00 ug/L 11/06/15 18:42 1 2-Chlorotoluene <1.00 1.00 ug/L 11/06/15 18:42 1 14 4-Chlorotoluene <1.00 1.00 ug/L 11/06/15 18:42 1 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/06/15 18:42 1 15 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/06/15 18:42 1 Dibromomethane <1.00 1.00 ug/L 11/06/15 18:42 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 18:42 1 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 18:42 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 18:42 1 Dichlorodifluoromethane <3.00 3.00 ug/L 11/06/15 18:42 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/06/15 18:42 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/06/15 18:42 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/06/15 18:42 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/06/15 18:42 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/06/15 18:42 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/06/15 18:42 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/06/15 18:42 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/06/15 18:42 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/06/15 18:42 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/06/15 18:42 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/06/15 18:42 1 Ethylbenzene <1.00 1.00 ug/L 11/06/15 18:42 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/06/15 18:42 1 Hexane <1.00 1.00 ug/L 11/06/15 18:42 1 Isopropylbenzene <1.00 1.00 ug/L 11/06/15 18:42 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/06/15 18:42 1 Methylene Chloride <5.00 5.00 ug/L 11/06/15 18:42 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/06/15 18:42 1 Naphthalene <5.00 5.00 ug/L 11/06/15 18:42 1 N-Propylbenzene <1.00 1.00 ug/L 11/06/15 18:42 1 Styrene <1.00 1.00 ug/L 11/06/15 18:42 1 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/06/15 18:42 1

TestAmerica Cedar Falls

Page 59 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E Lab Sample ID: 310-68161-14 Date Collected: 11/03/15 14:10 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/06/15 18:42 1 Tetrachloroethene <1.00 1.00 ug/L 11/06/15 18:42 1 6 Toluene <1.00 1.00 ug/L 11/06/15 18:42 1 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/06/15 18:42 1 7 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/06/15 18:42 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/06/15 18:42 1 8 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/06/15 18:42 1 Trichloroethene <1.00 1.00 ug/L 11/06/15 18:42 1 Trichlorofluoromethane <4.00 4.00 ug/L 11/06/15 18:42 1 9 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/06/15 18:42 1 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/06/15 18:42 1 10 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/06/15 18:42 1 Vinyl chloride <1.00 1.00 ug/L 11/06/15 18:42 1 11 Xylenes, Total <3.00 3.00 ug/L 11/06/15 18:42 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 107 75 - 120 11/06/15 18:42 1 13 Dibromofluoromethane (Surr) 99 75 - 120 11/06/15 18:42 1 Toluene-d8 (Surr) 108 80 - 120 11/06/15 18:42 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Benzo[a]anthracene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Benzo[a]pyrene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Benzidine <111 111 ug/L 11/05/15 11:12 11/09/15 19:47 1 Benzo[b]fluoranthene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Benzo[g,h,i]perylene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Benzo[k]fluoranthene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Acenaphthene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Acenaphthylene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Benzyl alcohol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Butyl benzyl phthalate <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Bis(2-chloroethyl)ether <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Bis(2-chloroethoxy)methane <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Bis(2-ethylhexyl) phthalate <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 bis (2-chloroisopropyl) ether <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 4-Bromophenyl phenyl ether <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Carbazole <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 4-Chloroaniline <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2-Chloronaphthalene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 4-Chlorophenyl phenyl ether <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Chrysene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Dibenz(a,h)anthracene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Dibenzofuran <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Di-n-butyl phthalate <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 1,2-Dichlorobenzene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 1,3-Dichlorobenzene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 1,4-Dichlorobenzene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 3,3'-Dichlorobenzidine <55.6 55.6 ug/L 11/05/15 11:12 11/09/15 19:47 1

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Page 60 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E Lab Sample ID: 310-68161-14 Date Collected: 11/03/15 14:10 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Dimethyl phthalate <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 6 2,4-Dinitrotoluene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2,6-Dinitrotoluene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 7 Fluorene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Hexachlorobenzene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 8 Hexachlorobutadiene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Hexachlorocyclopentadiene <22.2 22.2 ug/L 11/05/15 11:12 11/09/15 19:47 1 Hexachloroethane <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 9 Di-n-octyl phthalate <22.2 22.2 ug/L 11/05/15 11:12 11/09/15 19:47 1 Fluoranthene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 10 Indeno[1,2,3-cd]pyrene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Isophorone <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 11 2-Methylnaphthalene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Naphthalene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 12 2-Nitroaniline <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 3-Nitroaniline <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 13 4-Nitroaniline <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Nitrobenzene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 14 N-Nitrosodiphenylamine <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 N-Nitrosodi-n-propylamine <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 15 N-Nitrosodimethylamine <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Phenanthrene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Pyrene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Pyridine <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 1,2,4-Trichlorobenzene <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Benzoic acid <111 111 ug/L 11/05/15 11:12 11/09/15 19:47 1 4-Chloro-3-methylphenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2-Chlorophenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Total Cresols <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2,4-Dichlorophenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2,4-Dimethylphenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2,4-Dinitrophenol <22.2 22.2 ug/L 11/05/15 11:12 11/09/15 19:47 1 4,6-Dinitro-2-methylphenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2-Methylphenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Methylphenol, 3 & 4 <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2-Nitrophenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 4-Nitrophenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Pentachlorophenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 Phenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2,4,5-Trichlorophenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1 2,4,6-Trichlorophenol <11.1 11.1 ug/L 11/05/15 11:12 11/09/15 19:47 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 26 15 - 50 11/05/15 11:12 11/09/15 19:47 1 Phenol-d6 (Surr) 19 10 - 35 11/05/15 11:12 11/09/15 19:47 1 Nitrobenzene-d5 (Surr) 45 25 - 80 11/05/15 11:12 11/09/15 19:47 1 2-Fluorobiphenyl (Surr) 44 25 - 80 11/05/15 11:12 11/09/15 19:47 1 2,4,6-Tribromophenol (Surr) 49 25 - 100 11/05/15 11:12 11/09/15 19:47 1 Terphenyl-d14 (Surr) 68 30 - 105 11/05/15 11:12 11/09/15 19:47 1

TestAmerica Cedar Falls

Page 61 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E Lab Sample ID: 310-68161-14 Date Collected: 11/03/15 14:10 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Aldrin <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 alpha-BHC <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 6 beta-BHC <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 Chlordane (technical) <2.13 2.13 ug/L 11/05/15 11:30 11/09/15 12:12 1 7 4,4'-DDD <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 4,4'-DDE <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 8 4,4'-DDT <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 delta-BHC <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 Dieldrin <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 9 Endosulfan I <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 Endosulfan II <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 10 Endosulfan sulfate <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 Endrin <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 11 Endrin aldehyde <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 gamma-BHC (Lindane) <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 12 Heptachlor <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 Heptachlor epoxide <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 13 Methoxychlor <0.0340 0.0340 ug/L 11/05/15 11:30 11/09/15 12:12 1 Toxaphene <2.13 2.13 ug/L 11/05/15 11:30 11/09/15 12:12 1 14

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 35 30 - 125 11/05/15 11:30 11/09/15 12:12 1 15 Tetrachloro-m-xylene 38 15 - 115 11/05/15 11:30 11/09/15 12:12 1

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.842 0.842 ug/L 11/05/15 11:31 11/09/15 11:41 1 PCB-1221 <0.842 0.842 ug/L 11/05/15 11:31 11/09/15 11:41 1 PCB-1232 <0.842 0.842 ug/L 11/05/15 11:31 11/09/15 11:41 1 PCB-1242 <0.842 0.842 ug/L 11/05/15 11:31 11/09/15 11:41 1 PCB-1248 <0.842 0.842 ug/L 11/05/15 11:31 11/09/15 11:41 1 PCB-1254 <0.842 0.842 ug/L 11/05/15 11:31 11/09/15 11:41 1 PCB-1260 <0.842 0.842 ug/L 11/05/15 11:31 11/09/15 11:41 1 PCB-1268 <0.842 0.842 ug/L 11/05/15 11:31 11/09/15 11:41 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 179 E X 25 - 115 11/05/15 11:31 11/09/15 11:41 1 Tetrachloro-m-xylene 171 X 20 - 90 11/05/15 11:31 11/09/15 11:41 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <278 278 ug/L 11/05/15 11:03 11/06/15 15:24 1 Gasoline <278 278 ug/L 11/05/15 11:03 11/06/15 15:24 1 Waste Oil <278 278 ug/L 11/05/15 11:03 11/06/15 15:24 1 Total Extractable Hydrocarbons <463 463 ug/L 11/05/15 11:03 11/06/15 15:24 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 102 45 - 140 11/05/15 11:03 11/06/15 15:24 1

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Page 62 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E Lab Sample ID: 310-68161-14 Date Collected: 11/03/15 14:10 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 6020A - Metals (ICP/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Antimony <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 19:04 1 Arsenic 3.43 2.00 ug/L 11/05/15 16:54 11/09/15 19:04 1 6 Beryllium <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 19:04 1 Cadmium <0.500 0.500 ug/L 11/05/15 16:54 11/09/15 19:04 1 7 Chromium <5.00 5.00 ug/L 11/05/15 16:54 11/09/15 19:04 1 Copper <2.00 2.00 ug/L 11/05/15 16:54 11/09/15 19:04 1 8 Lead 1.45 0.500 ug/L 11/05/15 16:54 11/09/15 19:04 1 Nickel 15.1 5.00 ug/L 11/05/15 16:54 11/09/15 19:04 1 Selenium <5.00 5.00 ug/L 11/05/15 16:54 11/09/15 19:04 1 9 Silver <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 19:04 1 Thallium <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 19:04 1 10 Zinc <10.0 10.0 ug/L 11/05/15 16:54 11/09/15 19:04 1 11 Method: 7470A - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 12 Mercury <0.000200 0.000200 mg/L 11/06/15 13:31 11/09/15 11:43 1 13 14 15

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Page 63 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E Lab Sample ID: 310-68161-15 3 Date Collected: 11/03/15 15:30 Matrix: Ground Water Date Received: 11/04/15 09:35 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <100 100 ug/L 11/06/15 19:04 10 Benzene 102 5.00 ug/L 11/06/15 19:04 10 6 Bromobenzene <10.0 10.0 ug/L 11/06/15 19:04 10 Bromochloromethane <50.0 50.0 ug/L 11/06/15 19:04 10 7 Bromodichloromethane <10.0 10.0 ug/L 11/06/15 19:04 10 Bromoform <50.0 50.0 ug/L 11/06/15 19:04 10 8 Bromomethane <40.0 40.0 ug/L 11/06/15 19:04 10 2-Butanone (MEK) <100 100 ug/L 11/06/15 19:04 10 9 n-Butylbenzene <10.0 10.0 ug/L 11/06/15 19:04 10 sec-Butylbenzene <10.0 10.0 ug/L 11/06/15 19:04 10 10 tert-Butylbenzene <10.0 10.0 ug/L 11/06/15 19:04 10 Carbon disulfide <10.0 10.0 ug/L 11/06/15 19:04 10 Carbon tetrachloride <20.0 20.0 ug/L 11/06/15 19:04 10 11 Chlorobenzene <10.0 10.0 ug/L 11/06/15 19:04 10 Chlorodibromomethane <50.0 50.0 ug/L 11/06/15 19:04 10 12 Chloroethane <40.0 40.0 ug/L 11/06/15 19:04 10 Chloroform <10.0 10.0 ug/L 11/06/15 19:04 10 13 Chloromethane <30.0 30.0 ug/L 11/06/15 19:04 10 2-Chlorotoluene <10.0 10.0 ug/L 11/06/15 19:04 10 14 4-Chlorotoluene <10.0 10.0 ug/L 11/06/15 19:04 10 1,2-Dibromo-3-Chloropropane <100 100 ug/L 11/06/15 19:04 10 15 1,2-Dibromoethane (EDB) <100 100 ug/L 11/06/15 19:04 10 Dibromomethane <10.0 10.0 ug/L 11/06/15 19:04 10 1,2-Dichlorobenzene <10.0 10.0 ug/L 11/06/15 19:04 10 1,3-Dichlorobenzene <10.0 10.0 ug/L 11/06/15 19:04 10 1,4-Dichlorobenzene <10.0 10.0 ug/L 11/06/15 19:04 10 Dichlorodifluoromethane <30.0 30.0 ug/L 11/06/15 19:04 10 1,1-Dichloroethane <10.0 10.0 ug/L 11/06/15 19:04 10 1,2-Dichloroethane <10.0 10.0 ug/L 11/06/15 19:04 10 1,1-Dichloroethene <20.0 20.0 ug/L 11/06/15 19:04 10 cis-1,2-Dichloroethene <10.0 10.0 ug/L 11/06/15 19:04 10 trans-1,2-Dichloroethene <10.0 10.0 ug/L 11/06/15 19:04 10 1,2-Dichloropropane <10.0 10.0 ug/L 11/06/15 19:04 10 1,3-Dichloropropane <10.0 10.0 ug/L 11/06/15 19:04 10 2,2-Dichloropropane <40.0 40.0 ug/L 11/06/15 19:04 10 1,1-Dichloropropene <10.0 10.0 ug/L 11/06/15 19:04 10 cis-1,3-Dichloropropene <50.0 50.0 ug/L 11/06/15 19:04 10 trans-1,3-Dichloropropene <50.0 50.0 ug/L 11/06/15 19:04 10 Ethylbenzene <10.0 10.0 ug/L 11/06/15 19:04 10 Hexachlorobutadiene <50.0 50.0 ug/L 11/06/15 19:04 10 Hexane <10.0 10.0 ug/L 11/06/15 19:04 10 Isopropylbenzene <10.0 10.0 ug/L 11/06/15 19:04 10 p-Isopropyltoluene <10.0 10.0 ug/L 11/06/15 19:04 10 Methylene Chloride <50.0 50.0 ug/L 11/06/15 19:04 10 Methyl tert-butyl ether <10.0 10.0 ug/L 11/06/15 19:04 10 Naphthalene <50.0 50.0 ug/L 11/06/15 19:04 10 N-Propylbenzene <10.0 10.0 ug/L 11/06/15 19:04 10 Styrene <10.0 10.0 ug/L 11/06/15 19:04 10 1,1,1,2-Tetrachloroethane <10.0 10.0 ug/L 11/06/15 19:04 10

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Page 64 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E Lab Sample ID: 310-68161-15 Date Collected: 11/03/15 15:30 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <10.0 10.0 ug/L 11/06/15 19:04 10 Tetrachloroethene <10.0 10.0 ug/L 11/06/15 19:04 10 6 Toluene <10.0 10.0 ug/L 11/06/15 19:04 10 1,2,3-Trichlorobenzene <50.0 50.0 ug/L 11/06/15 19:04 10 7 1,2,4-Trichlorobenzene <50.0 50.0 ug/L 11/06/15 19:04 10 1,1,1-Trichloroethane <10.0 10.0 ug/L 11/06/15 19:04 10 8 1,1,2-Trichloroethane <10.0 10.0 ug/L 11/06/15 19:04 10 Trichloroethene <10.0 10.0 ug/L 11/06/15 19:04 10 Trichlorofluoromethane <40.0 40.0 ug/L 11/06/15 19:04 10 9 1,2,3-Trichloropropane <10.0 10.0 ug/L 11/06/15 19:04 10 1,2,4-Trimethylbenzene <10.0 10.0 ug/L 11/06/15 19:04 10 10 1,3,5-Trimethylbenzene <10.0 10.0 ug/L 11/06/15 19:04 10 Vinyl chloride <10.0 10.0 ug/L 11/06/15 19:04 10 11 Xylenes, Total <30.0 30.0 ug/L 11/06/15 19:04 10 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 100 75 - 120 11/06/15 19:04 10 13 Dibromofluoromethane (Surr) 95 75 - 120 11/06/15 19:04 10 Toluene-d8 (Surr) 107 80 - 120 11/06/15 19:04 10 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Benzo[a]anthracene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Benzo[a]pyrene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Benzidine <103 103 ug/L 11/05/15 11:12 11/09/15 20:11 1 Benzo[b]fluoranthene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Benzo[g,h,i]perylene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Benzo[k]fluoranthene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Acenaphthene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Acenaphthylene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Benzyl alcohol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Butyl benzyl phthalate <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Bis(2-chloroethyl)ether <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Bis(2-chloroethoxy)methane <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Bis(2-ethylhexyl) phthalate 13.2 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 bis (2-chloroisopropyl) ether <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 4-Bromophenyl phenyl ether <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Carbazole <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 4-Chloroaniline <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2-Chloronaphthalene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 4-Chlorophenyl phenyl ether <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Chrysene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Dibenz(a,h)anthracene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Dibenzofuran <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Di-n-butyl phthalate <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 1,2-Dichlorobenzene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 1,3-Dichlorobenzene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 1,4-Dichlorobenzene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 3,3'-Dichlorobenzidine <51.5 51.5 ug/L 11/05/15 11:12 11/09/15 20:11 1

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Page 65 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E Lab Sample ID: 310-68161-15 Date Collected: 11/03/15 15:30 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Dimethyl phthalate <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 6 2,4-Dinitrotoluene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2,6-Dinitrotoluene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 7 Fluorene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Hexachlorobenzene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 8 Hexachlorobutadiene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Hexachlorocyclopentadiene <20.6 20.6 ug/L 11/05/15 11:12 11/09/15 20:11 1 Hexachloroethane <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 9 Di-n-octyl phthalate <20.6 20.6 ug/L 11/05/15 11:12 11/09/15 20:11 1 Fluoranthene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 10 Indeno[1,2,3-cd]pyrene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Isophorone <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 11 2-Methylnaphthalene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Naphthalene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 12 2-Nitroaniline <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 3-Nitroaniline <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 13 4-Nitroaniline <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Nitrobenzene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 14 N-Nitrosodiphenylamine <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 N-Nitrosodi-n-propylamine <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 15 N-Nitrosodimethylamine <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Phenanthrene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Pyrene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Pyridine <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 1,2,4-Trichlorobenzene <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Benzoic acid <103 103 ug/L 11/05/15 11:12 11/09/15 20:11 1 4-Chloro-3-methylphenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2-Chlorophenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Total Cresols <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2,4-Dichlorophenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2,4-Dimethylphenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2,4-Dinitrophenol <20.6 20.6 ug/L 11/05/15 11:12 11/09/15 20:11 1 4,6-Dinitro-2-methylphenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2-Methylphenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Methylphenol, 3 & 4 <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2-Nitrophenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 4-Nitrophenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Pentachlorophenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 Phenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2,4,5-Trichlorophenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1 2,4,6-Trichlorophenol <10.3 10.3 ug/L 11/05/15 11:12 11/09/15 20:11 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 28 15 - 50 11/05/15 11:12 11/09/15 20:11 1 Phenol-d6 (Surr) 20 10 - 35 11/05/15 11:12 11/09/15 20:11 1 Nitrobenzene-d5 (Surr) 52 25 - 80 11/05/15 11:12 11/09/15 20:11 1 2-Fluorobiphenyl (Surr) 47 25 - 80 11/05/15 11:12 11/09/15 20:11 1 2,4,6-Tribromophenol (Surr) 57 25 - 100 11/05/15 11:12 11/09/15 20:11 1 Terphenyl-d14 (Surr) 64 30 - 105 11/05/15 11:12 11/09/15 20:11 1

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Page 66 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E Lab Sample ID: 310-68161-15 Date Collected: 11/03/15 15:30 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Aldrin <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 alpha-BHC <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 6 beta-BHC <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 Chlordane (technical) <2.15 2.15 ug/L 11/05/15 11:30 11/09/15 12:25 1 7 4,4'-DDD <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 4,4'-DDE <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 8 4,4'-DDT <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 delta-BHC <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 Dieldrin <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 9 Endosulfan I <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 Endosulfan II <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 10 Endosulfan sulfate <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 Endrin <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 11 Endrin aldehyde <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 gamma-BHC (Lindane) <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 12 Heptachlor <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 Heptachlor epoxide <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 13 Methoxychlor <0.0344 0.0344 ug/L 11/05/15 11:30 11/09/15 12:25 1 Toxaphene <2.15 2.15 ug/L 11/05/15 11:30 11/09/15 12:25 1 14

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 23 X 30 - 125 11/05/15 11:30 11/09/15 12:25 1 15 Tetrachloro-m-xylene 25 15 - 115 11/05/15 11:30 11/09/15 12:25 1

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.879 0.879 ug/L 11/05/15 11:31 11/09/15 11:52 1 PCB-1221 <0.879 0.879 ug/L 11/05/15 11:31 11/09/15 11:52 1 PCB-1232 <0.879 0.879 ug/L 11/05/15 11:31 11/09/15 11:52 1 PCB-1242 <0.879 0.879 ug/L 11/05/15 11:31 11/09/15 11:52 1 PCB-1248 <0.879 0.879 ug/L 11/05/15 11:31 11/09/15 11:52 1 PCB-1254 <0.879 0.879 ug/L 11/05/15 11:31 11/09/15 11:52 1 PCB-1260 <0.879 0.879 ug/L 11/05/15 11:31 11/09/15 11:52 1 PCB-1268 <0.879 0.879 ug/L 11/05/15 11:31 11/09/15 11:52 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 65 25 - 115 11/05/15 11:31 11/09/15 11:52 1 Tetrachloro-m-xylene 151 X 20 - 90 11/05/15 11:31 11/09/15 11:52 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <278 278 ug/L 11/05/15 11:03 11/06/15 15:39 1 Gasoline <278 278 ug/L 11/05/15 11:03 11/06/15 15:39 1 Waste Oil 1550 278 ug/L 11/05/15 11:03 11/06/15 15:39 1 Total Extractable Hydrocarbons 2240 463 ug/L 11/05/15 11:03 11/06/15 15:39 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 96 45 - 140 11/05/15 11:03 11/06/15 15:39 1

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Page 67 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E Lab Sample ID: 310-68161-15 Date Collected: 11/03/15 15:30 Matrix: Ground Water 3 Date Received: 11/04/15 09:35 4 Method: 6020A - Metals (ICP/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Antimony 1.60 1.00 ug/L 11/05/15 16:54 11/09/15 19:07 1 Arsenic 10.1 2.00 ug/L 11/05/15 16:54 11/09/15 19:07 1 6 Beryllium <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 19:07 1 Cadmium <0.500 0.500 ug/L 11/05/15 16:54 11/09/15 19:07 1 7 Chromium 8.41 5.00 ug/L 11/05/15 16:54 11/09/15 19:07 1 Copper 3.73 2.00 ug/L 11/05/15 16:54 11/09/15 19:07 1 8 Lead 6.27 1.00 ug/L 11/05/15 16:54 11/11/15 18:48 2 Nickel 22.4 5.00 ug/L 11/05/15 16:54 11/09/15 19:07 1 Selenium <5.00 5.00 ug/L 11/05/15 16:54 11/09/15 19:07 1 9 Silver <1.00 1.00 ug/L 11/05/15 16:54 11/09/15 19:07 1 Thallium <2.00 2.00 ug/L 11/05/15 16:54 11/11/15 18:48 2 10 Zinc 24.1 10.0 ug/L 11/05/15 16:54 11/09/15 19:07 1 11 Method: 7470A - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 12 Mercury <0.000200 0.000200 mg/L 11/06/15 13:31 11/09/15 11:44 1 13 14 15

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Page 68 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: Trip Blank Lab Sample ID: 310-68161-16 3 Date Collected: 11/02/15 00:00 Matrix: Water Date Received: 11/04/15 09:35 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <10.0 10.0 ug/L 11/06/15 19:25 1 Benzene <0.500 0.500 ug/L 11/06/15 19:25 1 6 Bromobenzene <1.00 1.00 ug/L 11/06/15 19:25 1 Bromochloromethane <5.00 5.00 ug/L 11/06/15 19:25 1 7 Bromodichloromethane <1.00 1.00 ug/L 11/06/15 19:25 1 Bromoform <5.00 5.00 ug/L 11/06/15 19:25 1 8 Bromomethane <4.00 4.00 ug/L 11/06/15 19:25 1 2-Butanone (MEK) <10.0 10.0 ug/L 11/06/15 19:25 1 9 n-Butylbenzene <1.00 1.00 ug/L 11/06/15 19:25 1 sec-Butylbenzene <1.00 1.00 ug/L 11/06/15 19:25 1 10 tert-Butylbenzene <1.00 1.00 ug/L 11/06/15 19:25 1 Carbon disulfide <1.00 1.00 ug/L 11/06/15 19:25 1 Carbon tetrachloride <2.00 2.00 ug/L 11/06/15 19:25 1 11 Chlorobenzene <1.00 1.00 ug/L 11/06/15 19:25 1 Chlorodibromomethane <5.00 5.00 ug/L 11/06/15 19:25 1 12 Chloroethane <4.00 4.00 ug/L 11/06/15 19:25 1 Chloroform <1.00 1.00 ug/L 11/06/15 19:25 1 13 Chloromethane <3.00 3.00 ug/L 11/06/15 19:25 1 2-Chlorotoluene <1.00 1.00 ug/L 11/06/15 19:25 1 14 4-Chlorotoluene <1.00 1.00 ug/L 11/06/15 19:25 1 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/06/15 19:25 1 15 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/06/15 19:25 1 Dibromomethane <1.00 1.00 ug/L 11/06/15 19:25 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 19:25 1 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 19:25 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 19:25 1 Dichlorodifluoromethane <3.00 3.00 ug/L 11/06/15 19:25 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/06/15 19:25 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/06/15 19:25 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/06/15 19:25 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/06/15 19:25 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/06/15 19:25 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/06/15 19:25 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/06/15 19:25 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/06/15 19:25 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/06/15 19:25 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/06/15 19:25 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/06/15 19:25 1 Ethylbenzene <1.00 1.00 ug/L 11/06/15 19:25 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/06/15 19:25 1 Hexane <1.00 1.00 ug/L 11/06/15 19:25 1 Isopropylbenzene <1.00 1.00 ug/L 11/06/15 19:25 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/06/15 19:25 1 Methylene Chloride <5.00 5.00 ug/L 11/06/15 19:25 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/06/15 19:25 1 Naphthalene <5.00 5.00 ug/L 11/06/15 19:25 1 N-Propylbenzene <1.00 1.00 ug/L 11/06/15 19:25 1 Styrene <1.00 1.00 ug/L 11/06/15 19:25 1 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/06/15 19:25 1

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Page 69 of 139 11/12/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: Trip Blank Lab Sample ID: 310-68161-16 Date Collected: 11/02/15 00:00 Matrix: Water 3 Date Received: 11/04/15 09:35 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/06/15 19:25 1 Tetrachloroethene <1.00 1.00 ug/L 11/06/15 19:25 1 6 Toluene <1.00 1.00 ug/L 11/06/15 19:25 1 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/06/15 19:25 1 7 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/06/15 19:25 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/06/15 19:25 1 8 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/06/15 19:25 1 Trichloroethene <1.00 1.00 ug/L 11/06/15 19:25 1 Trichlorofluoromethane <4.00 4.00 ug/L 11/06/15 19:25 1 9 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/06/15 19:25 1 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/06/15 19:25 1 10 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/06/15 19:25 1 Vinyl chloride <1.00 1.00 ug/L 11/06/15 19:25 1 11 Xylenes, Total <3.00 3.00 ug/L 11/06/15 19:25 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 98 75 - 120 11/06/15 19:25 1 13 Dibromofluoromethane (Surr) 96 75 - 120 11/06/15 19:25 1 Toluene-d8 (Surr) 110 80 - 120 11/06/15 19:25 1 14 15

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Page 70 of 139 11/12/2015 Definitions/Glossary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Qualifiers 3 GC/MS VOA 4 Qualifier Qualifier Description F1 MS and/or MSD Recovery is outside acceptance limits. X Surrogate is outside control limits 5 J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. 6 GC/MS Semi VOA Qualifier Qualifier Description 7 F1 MS and/or MSD Recovery is outside acceptance limits. X Surrogate is outside control limits F2 MS/MSD RPD exceeds control limits 8 J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. 9 GC Semi VOA Qualifier Qualifier Description 10 Z The chromatographic response does not resemble a typical fuel pattern. E Result exceeded calibration range. 11 X Surrogate is outside control limits D Surrogate or matrix spike recoveries were not obtained because the extract was diluted for analysis; also compounds analyzed at a dilution may be flagged with a D. 12

Glossary 13

Abbreviation These commonly used abbreviations may or may not be present in this report. 14 ¤ Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery 15 CFL Contains Free Liquid CNF Contains no Free Liquid DER Duplicate error ratio (normalized absolute difference) Dil Fac Dilution Factor DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision level concentration MDA Minimum detectable activity EDL Estimated Detection Limit MDC Minimum detectable concentration MDL Method Detection Limit ML Minimum Level (Dioxin) NC Not Calculated ND Not detected at the reporting limit (or MDL or EDL if shown) PQL Practical Quantitation Limit QC Quality Control RER Relative error ratio RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin)

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Page 71 of 139 11/12/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS 3 Matrix: Ground Water Prep Type: Total/NA 4 Percent Surrogate Recovery (Acceptance Limits) BFB DBFM TOL Lab Sample ID Client Sample ID (75-120) (75-120) (80-120) 5 310-68161-13 B-8E 99 91 108 310-68161-14 B-9E 107 99 108 6 310-68161-15 B-13E 100 95 107 7 Surrogate Legend BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) 8 TOL = Toluene-d8 (Surr) 9 Method: 8260C - Volatile Organic Compounds by GC/MS 10 Matrix: Soil Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) 11 BFB DBFM TOL Lab Sample ID Client Sample ID (80-120) (75-125) (80-120) 12 310-68161-2 B-8E 6-7.5' 90 93 103 310-68161-3 B-9E 2.5-3.5' 100 41 X 100 13 310-68161-6 B-11E 3-4' 97 75 99 310-68161-7 B-13E 10-13' 100 91 102 14 310-68161-8 B-14E 5-7' 95 92 101 310-68161-9 B-17E 0-4' 95 94 103 15 310-68161-10 B-19E 0-4' 96 91 98 310-68161-11 B-20E 0-4' 99 94 98 310-68161-11 MS B-20E 0-4' 98 97 99 310-68161-11 MSD B-20E 0-4' 99 97 99 310-68161-12 B-22E 1-2.5' 88 96 106

Surrogate Legend BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) TOL = Toluene-d8 (Surr)

Method: 8260C - Volatile Organic Compounds by GC/MS Matrix: Solid Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) BFB DBFM TOL Lab Sample ID Client Sample ID (80-120) (75-125) (80-120) LCS 310-107621/2-A Lab Control Sample 101 97 100 LCS 310-107780/2-A Lab Control Sample 99 101 100 LCS 310-107816/2-A Lab Control Sample 102 101 99 MB 310-107621/1-A Method Blank 101 94 100 MB 310-107780/1-A Method Blank 99 93 100 MB 310-107816/1-A Method Blank 102 94 98

Surrogate Legend BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) TOL = Toluene-d8 (Surr)

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Page 72 of 139 11/12/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS 3 Matrix: Water Prep Type: Total/NA 4 Percent Surrogate Recovery (Acceptance Limits) BFB DBFM TOL Lab Sample ID Client Sample ID (75-120) (75-120) (80-120) 5 310-68161-16 Trip Blank 98 96 110 LCS 310-107501/5 Lab Control Sample 98 105 109 6 LCS 310-107501/6 Lab Control Sample 98 100 103 MB 310-107501/7 Method Blank 96 102 103 7 Surrogate Legend 8 BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) TOL = Toluene-d8 (Surr) 9

Method: 8270D - Semivolatile Organic Compounds (GC/MS) 10 Matrix: Ground Water Prep Type: Total/NA 11 Percent Surrogate Recovery (Acceptance Limits) 2FP PHL NBZ FBP TBP TPH 12 Lab Sample ID Client Sample ID (15-50) (10-35) (25-80) (25-80) (25-100) (30-105) 310-68161-13 B-8E 27 20 48 48 52 75 13 310-68161-14 B-9E 26 19 45 44 49 68 310-68161-15 B-13E 28 20 52 47 57 64 14 Surrogate Legend 2FP = 2-Fluorophenol (Surr) 15 PHL = Phenol-d6 (Surr) NBZ = Nitrobenzene-d5 (Surr) FBP = 2-Fluorobiphenyl (Surr) TBP = 2,4,6-Tribromophenol (Surr) TPH = Terphenyl-d14 (Surr)

Method: 8270D - Semivolatile Organic Compounds (GC/MS) Matrix: Soil Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) 2FP PHL NBZ FBP TBP TPH Lab Sample ID Client Sample ID (15-90) (20-90) (15-90) (20-90) (25-105) (35-110) 310-68161-1 B-8E 0.5-5' 0.03 X 0.9 X 39 39 0.1 X 44 310-68161-1 MS B-8E 0.5-5' 0.2 X 2 X 40 37 0.2 X 34 X 310-68161-1 MSD B-8E 0.5-5' 0.06 X 0.9 X 35 34 0.1 X 37 310-68161-4 B-9E 7.5-9' 38 41 29 36 49 48 310-68161-5 B-11E 0-1.5' 25 31 35 36 35 43 310-68161-7 B-13E 10-13' 46 52 40 49 53 58 310-68161-8 B-14E 5-7' 43 42 21 31 33 37 310-68161-9 B-17E 0-4' 29 33 36 40 30 44 310-68161-10 B-19E 0-4' 46 51 50 52 44 57 310-68161-11 B-20E 0-4' 19 22 26 25 27 36 310-68161-12 B-22E 1-2.5' 30 33 30 36 30 32 X

Surrogate Legend 2FP = 2-Fluorophenol (Surr) PHL = Phenol-d6 (Surr) NBZ = Nitrobenzene-d5 (Surr)

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Page 73 of 139 11/12/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 FBP = 2-Fluorobiphenyl (Surr) 3 TBP = 2,4,6-Tribromophenol (Surr) TPH = Terphenyl-d14 (Surr) 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) 5 Matrix: Solid Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) 6 2FP PHL NBZ FBP TBP TPH Lab Sample ID Client Sample ID (15-90) (20-90) (15-90) (20-90) (25-105) (35-110) 7 LCS 310-107540/2-A Lab Control Sample 42 46 45 44 56 63 MB 310-107540/1-A Method Blank 43 47 45 45 50 62 8

Surrogate Legend 2FP = 2-Fluorophenol (Surr) 9 PHL = Phenol-d6 (Surr) NBZ = Nitrobenzene-d5 (Surr) 10 FBP = 2-Fluorobiphenyl (Surr) TBP = 2,4,6-Tribromophenol (Surr) 11 TPH = Terphenyl-d14 (Surr) 12 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Matrix: Water Prep Type: Total/NA 13 Percent Surrogate Recovery (Acceptance Limits) 14 2FP PHL NBZ FBP TBP TPH Lab Sample ID Client Sample ID (15-50) (10-35) (25-80) (25-80) (25-100) (30-105) 15 LCS 310-107521/2-A Lab Control Sample 26 18 49 49 60 75 LCSD 310-107521/3-A Lab Control Sample Dup 27 19 48 48 52 70 MB 310-107521/1-A Method Blank 26 18 47 45 53 75

Surrogate Legend 2FP = 2-Fluorophenol (Surr) PHL = Phenol-d6 (Surr) NBZ = Nitrobenzene-d5 (Surr) FBP = 2-Fluorobiphenyl (Surr) TBP = 2,4,6-Tribromophenol (Surr) TPH = Terphenyl-d14 (Surr)

Method: 8081B - Organochlorine Pesticides (GC) Matrix: Ground Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (30-125) (15-115) 310-68161-13 B-8E 39 39 310-68161-14 B-9E 35 38 310-68161-15 B-13E 23 X 25

Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene

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Page 74 of 139 11/12/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) 3 Matrix: Soil Prep Type: Total/NA 4 Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (56-128) (45-112) 5 310-68161-1 B-8E 0.5-5' 100 82 310-68161-4 B-9E 7.5-9' 124 86 6 310-68161-5 B-11E 0-1.5' 0 D 0 D 310-68161-7 B-13E 10-13' 79 75 7 310-68161-8 B-14E 5-7' 74 65 310-68161-9 B-17E 0-4' 206 X 93 8 310-68161-10 B-19E 0-4' 93 69 310-68161-11 B-20E 0-4' 106 87 9 310-68161-12 B-22E 1-2.5' 104 106

Surrogate Legend 10 DCB = DCB Decachlorobiphenyl TCX = Tetrachloro-m-xylene 11

Method: 8081B - Organochlorine Pesticides (GC) 12 Matrix: Solid Prep Type: Total/NA 13 Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 14 Lab Sample ID Client Sample ID (56-128) (45-112) LCS 500-311552/2-A Lab Control Sample 96 90 15 MB 500-311552/1-A Method Blank 97 88

Surrogate Legend DCB = DCB Decachlorobiphenyl TCX = Tetrachloro-m-xylene

Method: 8081B - Organochlorine Pesticides (GC) Matrix: Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (30-125) (15-115) LCS 310-107526/2-A Lab Control Sample 45 35 LCSD 310-107526/3-A Lab Control Sample Dup 48 38 MB 310-107526/1-A Method Blank 44 40

Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Matrix: Ground Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (25-115) (20-90) 310-68161-13 B-8E 160 E X 169 X 310-68161-14 B-9E 179 E X 171 X 310-68161-15 B-13E 65 151 X

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Page 75 of 139 11/12/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2

Surrogate Legend 3 DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene 4

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography 5 Matrix: Soil Prep Type: Total/NA 6 Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 7 Lab Sample ID Client Sample ID (40-120) (10-105) 310-68161-1 B-8E 0.5-5' 63 41 8 310-68161-4 B-9E 7.5-9' 68 48 310-68161-5 B-11E 0-1.5' 61 43 310-68161-7 B-13E 10-13' 71 70 9 310-68161-8 B-14E 5-7' 67 71 310-68161-9 B-17E 0-4' 58 55 10 310-68161-10 B-19E 0-4' 66 62 310-68161-11 B-20E 0-4' 48 41 11 310-68161-12 B-22E 1-2.5' 71 63 12 Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene 13

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography 14 Matrix: Solid Prep Type: Total/NA 15 Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (40-120) (10-105) LCS 310-107542/2-A Lab Control Sample 81 66 MB 310-107542/1-A Method Blank 83 74

Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Matrix: Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (25-115) (20-90) LCS 310-107527/2-A Lab Control Sample 88 81 LCSD 310-107527/3-A Lab Control Sample Dup 91 81 MB 310-107527/1-A Method Blank 84 73

Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene

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Page 76 of 139 11/12/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) 3 Matrix: Ground Water Prep Type: Total/NA 4 Percent Surrogate Recovery (Acceptance Limits) OTC Lab Sample ID Client Sample ID (45-140) 5 310-68161-13 B-8E 111 310-68161-14 B-9E 102 6 310-68161-15 B-13E 96 7 Surrogate Legend OTC = n-Octacosane 8 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) 9 Matrix: Soil Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) 10 OTC Lab Sample ID Client Sample ID (40-135) 11 310-68161-1 B-8E 0.5-5' 102 310-68161-4 B-9E 7.5-9' 75 12 310-68161-5 B-11E 0-1.5' 64 310-68161-7 B-13E 10-13' 44 13 310-68161-8 B-14E 5-7' 50 310-68161-9 B-17E 0-4' 83 14 310-68161-10 B-19E 0-4' 81 310-68161-11 B-20E 0-4' 87 15 310-68161-12 B-22E 1-2.5' 79

Surrogate Legend OTC = n-Octacosane

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Matrix: Solid Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) OTC Lab Sample ID Client Sample ID (40-135) LCS 310-107537/2-A Lab Control Sample 88 MB 310-107537/1-A Method Blank 89

Surrogate Legend OTC = n-Octacosane

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Matrix: Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) OTC Lab Sample ID Client Sample ID (45-140) LCS 310-107516/2-A Lab Control Sample 112 LCSD 310-107516/3-A Lab Control Sample Dup 138 MB 310-107516/1-A Method Blank 120

Surrogate Legend OTC = n-Octacosane

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Page 77 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS 3 Lab Sample ID: MB 310-107501/7 Client Sample ID: Method Blank 4 Matrix: Water Prep Type: Total/NA Analysis Batch: 107501 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone <10.0 10.0 ug/L 11/06/15 13:17 1 6 Benzene <0.500 0.500 ug/L 11/06/15 13:17 1 Bromobenzene <1.00 1.00 ug/L 11/06/15 13:17 1 7 Bromochloromethane <5.00 5.00 ug/L 11/06/15 13:17 1 Bromodichloromethane <1.00 1.00 ug/L 11/06/15 13:17 1 8 Bromoform <5.00 5.00 ug/L 11/06/15 13:17 1 Bromomethane <4.00 4.00 ug/L 11/06/15 13:17 1 9 2-Butanone (MEK) <10.0 10.0 ug/L 11/06/15 13:17 1 n-Butylbenzene <1.00 1.00 ug/L 11/06/15 13:17 1 10 sec-Butylbenzene <1.00 1.00 ug/L 11/06/15 13:17 1 tert-Butylbenzene <1.00 1.00 ug/L 11/06/15 13:17 1 11 Carbon disulfide <1.00 1.00 ug/L 11/06/15 13:17 1 Carbon tetrachloride <2.00 2.00 ug/L 11/06/15 13:17 1 12 Chlorobenzene <1.00 1.00 ug/L 11/06/15 13:17 1 Chlorodibromomethane <5.00 5.00 ug/L 11/06/15 13:17 1 Chloroethane <4.00 4.00 ug/L 11/06/15 13:17 1 13 Chloroform <1.00 1.00 ug/L 11/06/15 13:17 1 Chloromethane <3.00 3.00 ug/L 11/06/15 13:17 1 14 2-Chlorotoluene <1.00 1.00 ug/L 11/06/15 13:17 1 4-Chlorotoluene <1.00 1.00 ug/L 11/06/15 13:17 1 15 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/06/15 13:17 1 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/06/15 13:17 1 Dibromomethane <1.00 1.00 ug/L 11/06/15 13:17 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 13:17 1 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 13:17 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/06/15 13:17 1 Dichlorodifluoromethane <3.00 3.00 ug/L 11/06/15 13:17 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/06/15 13:17 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/06/15 13:17 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/06/15 13:17 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/06/15 13:17 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/06/15 13:17 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/06/15 13:17 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/06/15 13:17 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/06/15 13:17 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/06/15 13:17 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/06/15 13:17 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/06/15 13:17 1 Ethylbenzene <1.00 1.00 ug/L 11/06/15 13:17 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/06/15 13:17 1 Hexane <1.00 1.00 ug/L 11/06/15 13:17 1 Isopropylbenzene <1.00 1.00 ug/L 11/06/15 13:17 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/06/15 13:17 1 Methylene Chloride <5.00 5.00 ug/L 11/06/15 13:17 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/06/15 13:17 1 Naphthalene <5.00 5.00 ug/L 11/06/15 13:17 1 N-Propylbenzene <1.00 1.00 ug/L 11/06/15 13:17 1 Styrene <1.00 1.00 ug/L 11/06/15 13:17 1

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Page 78 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-107501/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107501 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/06/15 13:17 1 6 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/06/15 13:17 1 Tetrachloroethene <1.00 1.00 ug/L 11/06/15 13:17 1 7 Toluene <1.00 1.00 ug/L 11/06/15 13:17 1 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/06/15 13:17 1 8 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/06/15 13:17 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/06/15 13:17 1 9 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/06/15 13:17 1 Trichloroethene <1.00 1.00 ug/L 11/06/15 13:17 1 10 Trichlorofluoromethane <4.00 4.00 ug/L 11/06/15 13:17 1 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/06/15 13:17 1 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/06/15 13:17 1 11 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/06/15 13:17 1 Vinyl chloride <1.00 1.00 ug/L 11/06/15 13:17 1 12 Xylenes, Total <3.00 3.00 ug/L 11/06/15 13:17 1 13 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 14 4-Bromofluorobenzene (Surr) 96 75 - 120 11/06/15 13:17 1 Dibromofluoromethane (Surr) 102 75 - 120 11/06/15 13:17 1 Toluene-d8 (Surr) 103 80 - 120 11/06/15 13:17 1 15

Lab Sample ID: LCS 310-107501/5 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 107501 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Acetone 40.0 39.18 ug/L 98 60 - 150 Benzene 20.0 19.00 ug/L 95 70 - 130 Bromobenzene 20.0 19.19 ug/L 96 75 - 130 Bromochloromethane 20.0 19.13 ug/L 96 65 - 145 Bromodichloromethane 20.0 18.17 ug/L 91 60 - 130 Bromoform 20.0 17.69 ug/L 88 30 - 125 2-Butanone (MEK) 40.0 37.31 ug/L 93 55 - 140 n-Butylbenzene 20.0 23.58 ug/L 118 55 - 135 sec-Butylbenzene 20.0 22.03 ug/L 110 65 - 135 tert-Butylbenzene 20.0 21.46 ug/L 107 60 - 135 Carbon disulfide 20.0 17.66 ug/L 88 40 - 130 Carbon tetrachloride 20.0 19.98 ug/L 100 55 - 130 Chlorobenzene 20.0 20.53 ug/L 103 75 - 125 Chlorodibromomethane 20.0 18.49 ug/L 92 45 - 125 Chloroform 20.0 17.48 ug/L 87 70 - 125 2-Chlorotoluene 20.0 21.36 ug/L 107 75 - 135 4-Chlorotoluene 20.0 21.13 ug/L 106 70 - 140 1,2-Dibromo-3-Chloropropane 20.0 23.57 ug/L 118 35 - 130 1,2-Dibromoethane (EDB) 20.0 18.35 ug/L 92 70 - 135 Dibromomethane 20.0 19.20 ug/L 96 75 - 130 1,2-Dichlorobenzene 20.0 21.51 ug/L 108 65 - 135 1,3-Dichlorobenzene 20.0 20.20 ug/L 101 70 - 130

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Page 79 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-107501/5 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107501 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits 1,4-Dichlorobenzene 20.0 21.60 ug/L 108 60 - 140 6 1,1-Dichloroethane 20.0 18.07 ug/L 90 60 - 130 1,2-Dichloroethane 20.0 19.45 ug/L 97 65 - 140 7 1,1-Dichloroethene 20.0 19.04 ug/L 95 60 - 135 cis-1,2-Dichloroethene 20.0 17.94 ug/L 90 70 - 135 8 trans-1,2-Dichloroethene 20.0 18.34 ug/L 92 60 - 145 1,2-Dichloropropane 20.0 17.85 ug/L 89 65 - 130 9 1,3-Dichloropropane 20.0 18.50 ug/L 93 75 - 125 2,2-Dichloropropane 20.0 20.20 ug/L 101 25 - 120 10 1,1-Dichloropropene 20.0 19.66 ug/L 98 60 - 140 cis-1,3-Dichloropropene 20.0 19.09 ug/L 95 30 - 120 trans-1,3-Dichloropropene 20.0 17.97 ug/L 90 35 - 120 11 Ethylbenzene 20.0 21.20 ug/L 106 70 - 130 Hexachlorobutadiene 20.0 22.51 ug/L 113 60 - 135 12 Hexane 20.0 20.48 ug/L 102 40 - 135 Isopropylbenzene 20.0 21.04 ug/L 105 70 - 125 13 p-Isopropyltoluene 20.0 23.16 ug/L 116 60 - 140 Methylene Chloride 20.0 17.31 ug/L 87 55 - 145 14 Methyl tert-butyl ether 20.0 18.78 ug/L 94 50 - 135 Naphthalene 20.0 20.70 ug/L 104 40 - 135 15 N-Propylbenzene 20.0 21.84 ug/L 109 70 - 135 Styrene 20.0 20.33 ug/L 102 70 - 130 1,1,1,2-Tetrachloroethane 20.0 20.13 ug/L 101 65 - 120 1,1,2,2-Tetrachloroethane 20.0 20.21 ug/L 101 65 - 130 Tetrachloroethene 20.0 18.27 ug/L 91 70 - 135 Toluene 20.0 19.31 ug/L 97 70 - 135 1,2,3-Trichlorobenzene 20.0 22.54 ug/L 113 55 - 130 1,2,4-Trichlorobenzene 20.0 20.87 ug/L 104 40 - 135 1,1,1-Trichloroethane 20.0 19.38 ug/L 97 60 - 125 1,1,2-Trichloroethane 20.0 17.88 ug/L 89 75 - 125 Trichloroethene 20.0 19.21 ug/L 96 70 - 130 1,2,3-Trichloropropane 20.0 22.89 ug/L 114 60 - 150 1,2,4-Trimethylbenzene 20.0 21.81 ug/L 109 70 - 140 1,3,5-Trimethylbenzene 20.0 21.85 ug/L 109 70 - 140 Xylenes, Total 40.0 41.93 ug/L 105 70 - 130

LCS LCS Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 98 75 - 120 Dibromofluoromethane (Surr) 105 75 - 120 Toluene-d8 (Surr) 109 80 - 120

Lab Sample ID: LCS 310-107501/6 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 107501 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Bromomethane 20.0 15.78 ug/L 79 35 - 130 Chloroethane 20.0 18.13 ug/L 91 55 - 135

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Page 80 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-107501/6 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107501 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Chloromethane 20.0 17.54 ug/L 88 30 - 125 6 Dichlorodifluoromethane 20.0 19.32 ug/L 97 35 - 130 Trichlorofluoromethane 20.0 21.18 ug/L 106 55 - 145 7 Vinyl chloride 20.0 18.21 ug/L 91 45 - 135

LCS LCS 8 Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 98 75 - 120 9 Dibromofluoromethane (Surr) 100 75 - 120 Toluene-d8 (Surr) 103 80 - 120 10 Lab Sample ID: MB 310-107621/1-A Client Sample ID: Method Blank 11 Matrix: Solid Prep Type: Total/NA Analysis Batch: 107622 Prep Batch: 107621 12 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone <116 116 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 13 Benzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Bromobenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 14 Bromochloromethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Bromodichloromethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 15 Bromoform <23.2 23.2 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Bromomethane <46.4 46.4 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 2-Butanone (MEK) <116 116 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 n-Butylbenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 sec-Butylbenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 tert-Butylbenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Carbon disulfide <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Carbon tetrachloride <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Chlorobenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Chlorodibromomethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Chloroethane <46.4 46.4 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Chloroform <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Chloromethane <46.4 46.4 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 2-Chlorotoluene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 4-Chlorotoluene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,2-Dibromo-3-Chloropropane <116 116 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,2-Dibromoethane (EDB) <116 116 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Dibromomethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,2-Dichlorobenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,3-Dichlorobenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,4-Dichlorobenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Dichlorodifluoromethane <34.8 34.8 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,1-Dichloroethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,2-Dichloroethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,1-Dichloroethene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 cis-1,2-Dichloroethene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 trans-1,2-Dichloroethene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,2-Dichloropropane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1

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Page 81 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-107621/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107622 Prep Batch: 107621 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,3-Dichloropropane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 6 2,2-Dichloropropane <46.4 46.4 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,1-Dichloropropene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 7 cis-1,3-Dichloropropene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 trans-1,3-Dichloropropene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 8 Ethylbenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Hexachlorobutadiene <58.0 58.0 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 9 Hexane <58.0 58.0 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Isopropylbenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 10 p-Isopropyltoluene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Methylene Chloride <116 116 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Methyl tert-butyl ether <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 11 Naphthalene <58.0 58.0 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 N-Propylbenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 12 Styrene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,1,1,2-Tetrachloroethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 13 1,1,2,2-Tetrachloroethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Tetrachloroethene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 14 Toluene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,2,3-Trichlorobenzene <58.0 58.0 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 15 1,2,4-Trichlorobenzene <58.0 58.0 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,1,1-Trichloroethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,1,2-Trichloroethane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Trichloroethene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Trichlorofluoromethane <46.4 46.4 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,2,3-Trichloropropane <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,2,4-Trimethylbenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 1,3,5-Trimethylbenzene <11.6 11.6 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Vinyl chloride <34.8 34.8 ug/Kg 11/06/15 07:11 11/06/15 09:02 1 Xylenes, Total <34.8 34.8 ug/Kg 11/06/15 07:11 11/06/15 09:02 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 101 80 - 120 11/06/15 07:11 11/06/15 09:02 1 Dibromofluoromethane (Surr) 94 75 - 125 11/06/15 07:11 11/06/15 09:02 1 Toluene-d8 (Surr) 100 80 - 120 11/06/15 07:11 11/06/15 09:02 1

Lab Sample ID: LCS 310-107621/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107622 Prep Batch: 107621 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Acetone 86.7 79.48 J ug/Kg 92 65 - 150 Benzene 43.3 37.53 ug/Kg 87 55 - 135 Bromobenzene 43.3 35.38 ug/Kg 82 65 - 125 Bromochloromethane 43.3 36.79 ug/Kg 85 65 - 130 Bromodichloromethane 43.3 37.50 ug/Kg 87 65 - 130 Bromoform 43.3 34.02 ug/Kg 78 50 - 135 2-Butanone (MEK) 86.7 72.39 J ug/Kg 84 50 - 145

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Page 82 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-107621/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107622 Prep Batch: 107621 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits n-Butylbenzene 43.3 37.01 ug/Kg 85 55 - 130 6 sec-Butylbenzene 43.3 38.65 ug/Kg 89 60 - 125 tert-Butylbenzene 43.3 39.20 ug/Kg 90 55 - 125 7 Carbon disulfide 43.3 37.89 ug/Kg 87 40 - 135 Carbon tetrachloride 43.3 37.55 ug/Kg 87 55 - 130 8 Chlorobenzene 43.3 37.03 ug/Kg 85 60 - 120 Chlorodibromomethane 43.3 35.30 ug/Kg 81 55 - 130 9 Chloroform 43.3 36.32 ug/Kg 84 65 - 130 2-Chlorotoluene 43.3 36.13 ug/Kg 83 60 - 125 10 4-Chlorotoluene 43.3 36.77 ug/Kg 85 60 - 125 1,2-Dibromo-3-Chloropropane 43.3 34.91 J ug/Kg 81 50 - 140 1,2-Dibromoethane (EDB) 43.3 38.01 J ug/Kg 88 55 - 140 11 Dibromomethane 43.3 35.59 ug/Kg 82 65 - 135 1,2-Dichlorobenzene 43.3 36.88 ug/Kg 85 65 - 120 12 1,3-Dichlorobenzene 43.3 36.95 ug/Kg 85 60 - 125 1,4-Dichlorobenzene 43.3 37.36 ug/Kg 86 60 - 125 13 1,1-Dichloroethane 43.3 38.09 ug/Kg 88 55 - 135 1,2-Dichloroethane 43.3 37.24 ug/Kg 86 60 - 140 14 1,1-Dichloroethene 43.3 35.97 ug/Kg 83 50 - 145 cis-1,2-Dichloroethene 43.3 37.23 ug/Kg 86 60 - 135 15 trans-1,2-Dichloroethene 43.3 38.04 ug/Kg 88 55 - 135 1,2-Dichloropropane 43.3 39.17 ug/Kg 90 55 - 130 1,3-Dichloropropane 43.3 36.93 ug/Kg 85 55 - 140 2,2-Dichloropropane 43.3 37.81 J ug/Kg 87 40 - 135 1,1-Dichloropropene 43.3 37.44 ug/Kg 86 55 - 130 cis-1,3-Dichloropropene 43.3 36.67 ug/Kg 85 50 - 115 trans-1,3-Dichloropropene 43.3 37.69 ug/Kg 87 55 - 130 Ethylbenzene 43.3 37.40 ug/Kg 86 60 - 125 Hexachlorobutadiene 43.3 37.54 J ug/Kg 87 40 - 135 Hexane 43.3 35.13 J ug/Kg 81 45 - 140 Isopropylbenzene 43.3 37.19 ug/Kg 86 60 - 125 p-Isopropyltoluene 43.3 37.47 ug/Kg 86 60 - 120 Methylene Chloride 43.3 48.39 J ug/Kg 112 55 - 145 Methyl tert-butyl ether 43.3 37.01 ug/Kg 85 55 - 130 Naphthalene 43.3 37.61 J ug/Kg 87 50 - 130 N-Propylbenzene 43.3 37.01 ug/Kg 85 50 - 125 Styrene 43.3 37.17 ug/Kg 86 60 - 125 1,1,1,2-Tetrachloroethane 43.3 36.71 ug/Kg 85 65 - 125 1,1,2,2-Tetrachloroethane 43.3 36.23 ug/Kg 84 60 - 125 Tetrachloroethene 43.3 32.36 ug/Kg 75 55 - 125 Toluene 43.3 38.57 ug/Kg 89 60 - 130 1,2,3-Trichlorobenzene 43.3 35.45 J ug/Kg 82 50 - 130 1,2,4-Trichlorobenzene 43.3 35.37 J ug/Kg 82 45 - 135 1,1,1-Trichloroethane 43.3 37.96 ug/Kg 88 60 - 125 1,1,2-Trichloroethane 43.3 35.03 ug/Kg 81 55 - 135 Trichloroethene 43.3 37.06 ug/Kg 85 60 - 130 1,2,3-Trichloropropane 43.3 37.54 ug/Kg 87 50 - 145 1,2,4-Trimethylbenzene 43.3 36.75 ug/Kg 85 55 - 125

TestAmerica Cedar Falls

Page 83 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-107621/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107622 Prep Batch: 107621 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits 1,3,5-Trimethylbenzene 43.3 38.38 ug/Kg 89 50 - 130 6 Xylenes, Total 86.7 61.85 ug/Kg 71 50 - 130

LCS LCS 7 Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 101 80 - 120 8 Dibromofluoromethane (Surr) 97 75 - 125 Toluene-d8 (Surr) 100 80 - 120 9

Lab Sample ID: MB 310-107780/1-A Client Sample ID: Method Blank 10 Matrix: Solid Prep Type: Total/NA Analysis Batch: 107781 Prep Batch: 107780 11 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 12 Acetone <122 122 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Benzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Bromobenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 13 Bromochloromethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Bromodichloromethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 14 Bromoform <24.3 24.3 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Bromomethane <48.7 48.7 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 15 2-Butanone (MEK) <122 122 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 n-Butylbenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 sec-Butylbenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 tert-Butylbenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Carbon disulfide <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Carbon tetrachloride <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Chlorobenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Chlorodibromomethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Chloroethane <48.7 48.7 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Chloroform <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Chloromethane <48.7 48.7 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 2-Chlorotoluene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 4-Chlorotoluene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,2-Dibromo-3-Chloropropane <122 122 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,2-Dibromoethane (EDB) <122 122 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Dibromomethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,2-Dichlorobenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,3-Dichlorobenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,4-Dichlorobenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Dichlorodifluoromethane <36.5 36.5 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,1-Dichloroethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,2-Dichloroethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,1-Dichloroethene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 cis-1,2-Dichloroethene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 trans-1,2-Dichloroethene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,2-Dichloropropane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,3-Dichloropropane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 2,2-Dichloropropane <48.7 48.7 ug/Kg 11/07/15 08:52 11/08/15 07:30 1

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Page 84 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-107780/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107781 Prep Batch: 107780 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,1-Dichloropropene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 6 cis-1,3-Dichloropropene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 trans-1,3-Dichloropropene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 7 Ethylbenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Hexachlorobutadiene <60.9 60.9 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 8 Hexane <60.9 60.9 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Isopropylbenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 9 p-Isopropyltoluene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Methylene Chloride <122 122 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 10 Methyl tert-butyl ether <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Naphthalene <60.9 60.9 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 N-Propylbenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 11 Styrene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,1,1,2-Tetrachloroethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 12 1,1,2,2-Tetrachloroethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Tetrachloroethene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 13 Toluene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,2,3-Trichlorobenzene <60.9 60.9 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 14 1,2,4-Trichlorobenzene <60.9 60.9 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,1,1-Trichloroethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 15 1,1,2-Trichloroethane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Trichloroethene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Trichlorofluoromethane <48.7 48.7 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,2,3-Trichloropropane <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,2,4-Trimethylbenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 1,3,5-Trimethylbenzene <12.2 12.2 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Vinyl chloride <36.5 36.5 ug/Kg 11/07/15 08:52 11/08/15 07:30 1 Xylenes, Total <36.5 36.5 ug/Kg 11/07/15 08:52 11/08/15 07:30 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 99 80 - 120 11/07/15 08:52 11/08/15 07:30 1 Dibromofluoromethane (Surr) 93 75 - 125 11/07/15 08:52 11/08/15 07:30 1 Toluene-d8 (Surr) 100 80 - 120 11/07/15 08:52 11/08/15 07:30 1

Lab Sample ID: LCS 310-107780/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107781 Prep Batch: 107780 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Acetone 88.8 101.5 J ug/Kg 114 65 - 150 Benzene 44.4 44.36 ug/Kg 100 55 - 135 Bromobenzene 44.4 41.03 ug/Kg 92 65 - 125 Bromochloromethane 44.4 46.67 ug/Kg 105 65 - 130 Bromodichloromethane 44.4 45.35 ug/Kg 102 65 - 130 Bromoform 44.4 43.49 ug/Kg 98 50 - 135 2-Butanone (MEK) 88.8 87.52 J ug/Kg 99 50 - 145 n-Butylbenzene 44.4 32.50 ug/Kg 73 55 - 130 sec-Butylbenzene 44.4 39.29 ug/Kg 88 60 - 125

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Page 85 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-107780/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107781 Prep Batch: 107780 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits tert-Butylbenzene 44.4 40.59 ug/Kg 91 55 - 125 6 Carbon disulfide 44.4 42.35 ug/Kg 95 40 - 135 Carbon tetrachloride 44.4 48.10 ug/Kg 108 55 - 130 7 Chlorobenzene 44.4 41.65 ug/Kg 94 60 - 120 Chlorodibromomethane 44.4 42.95 ug/Kg 97 55 - 130 8 Chloroform 44.4 46.16 ug/Kg 104 65 - 130 2-Chlorotoluene 44.4 38.42 ug/Kg 87 60 - 125 9 4-Chlorotoluene 44.4 37.11 ug/Kg 84 60 - 125 1,2-Dibromo-3-Chloropropane 44.4 41.35 J ug/Kg 93 50 - 140 10 1,2-Dibromoethane (EDB) 44.4 44.75 J ug/Kg 101 55 - 140 Dibromomethane 44.4 44.02 ug/Kg 99 65 - 135 1,2-Dichlorobenzene 44.4 37.84 ug/Kg 85 65 - 120 11 1,3-Dichlorobenzene 44.4 35.22 ug/Kg 79 60 - 125 1,4-Dichlorobenzene 44.4 35.42 ug/Kg 80 60 - 125 12 1,1-Dichloroethane 44.4 45.17 ug/Kg 102 55 - 135 1,2-Dichloroethane 44.4 46.41 ug/Kg 105 60 - 140 13 1,1-Dichloroethene 44.4 44.65 ug/Kg 101 50 - 145 cis-1,2-Dichloroethene 44.4 45.00 ug/Kg 101 60 - 135 14 trans-1,2-Dichloroethene 44.4 44.69 ug/Kg 101 55 - 135 1,2-Dichloropropane 44.4 42.33 ug/Kg 95 55 - 130 15 1,3-Dichloropropane 44.4 44.81 ug/Kg 101 55 - 140 2,2-Dichloropropane 44.4 44.10 J ug/Kg 99 40 - 135 1,1-Dichloropropene 44.4 44.47 ug/Kg 100 55 - 130 cis-1,3-Dichloropropene 44.4 41.23 ug/Kg 93 50 - 115 trans-1,3-Dichloropropene 44.4 40.51 ug/Kg 91 55 - 130 Ethylbenzene 44.4 41.07 ug/Kg 92 60 - 125 Hexachlorobutadiene 44.4 33.93 J ug/Kg 76 40 - 135 Hexane 44.4 35.77 J ug/Kg 81 45 - 140 Isopropylbenzene 44.4 41.24 ug/Kg 93 60 - 125 p-Isopropyltoluene 44.4 36.15 ug/Kg 81 60 - 120 Methylene Chloride 44.4 52.87 J ug/Kg 119 55 - 145 Methyl tert-butyl ether 44.4 44.85 ug/Kg 101 55 - 130 Naphthalene 44.4 38.39 J ug/Kg 86 50 - 130 N-Propylbenzene 44.4 37.04 ug/Kg 83 50 - 125 Styrene 44.4 39.99 ug/Kg 90 60 - 125 1,1,1,2-Tetrachloroethane 44.4 45.17 ug/Kg 102 65 - 125 1,1,2,2-Tetrachloroethane 44.4 38.69 ug/Kg 87 60 - 125 Tetrachloroethene 44.4 45.07 ug/Kg 101 55 - 125 Toluene 44.4 42.03 ug/Kg 95 60 - 130 1,2,3-Trichlorobenzene 44.4 32.14 J ug/Kg 72 50 - 130 1,2,4-Trichlorobenzene 44.4 27.36 J ug/Kg 62 45 - 135 1,1,1-Trichloroethane 44.4 47.47 ug/Kg 107 60 - 125 1,1,2-Trichloroethane 44.4 41.24 ug/Kg 93 55 - 135 Trichloroethene 44.4 44.25 ug/Kg 100 60 - 130 1,2,3-Trichloropropane 44.4 41.71 ug/Kg 94 50 - 145 1,2,4-Trimethylbenzene 44.4 34.37 ug/Kg 77 55 - 125 1,3,5-Trimethylbenzene 44.4 38.96 ug/Kg 88 50 - 130 Xylenes, Total 88.8 78.93 ug/Kg 89 50 - 130

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Page 86 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-107780/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107781 Prep Batch: 107780 5 LCS LCS Surrogate %Recovery Qualifier Limits 6 4-Bromofluorobenzene (Surr) 99 80 - 120 Dibromofluoromethane (Surr) 101 75 - 125 Toluene-d8 (Surr) 100 80 - 120 7

Lab Sample ID: MB 310-107816/1-A Client Sample ID: Method Blank 8 Matrix: Solid Prep Type: Total/NA Analysis Batch: 107817 Prep Batch: 107816 9 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 10 Acetone <116 116 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Benzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 11 Bromobenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Bromochloromethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 12 Bromodichloromethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Bromoform <23.2 23.2 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Bromomethane <46.4 46.4 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 13 2-Butanone (MEK) <116 116 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 n-Butylbenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 14 sec-Butylbenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 tert-Butylbenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 15 Carbon disulfide <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Carbon tetrachloride <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Chlorobenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Chlorodibromomethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Chloroethane <46.4 46.4 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Chloroform <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Chloromethane <46.4 46.4 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 2-Chlorotoluene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 4-Chlorotoluene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,2-Dibromo-3-Chloropropane <116 116 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,2-Dibromoethane (EDB) <116 116 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Dibromomethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,2-Dichlorobenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,3-Dichlorobenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,4-Dichlorobenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Dichlorodifluoromethane <34.8 34.8 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,1-Dichloroethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,2-Dichloroethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,1-Dichloroethene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 cis-1,2-Dichloroethene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 trans-1,2-Dichloroethene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,2-Dichloropropane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,3-Dichloropropane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 2,2-Dichloropropane <46.4 46.4 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,1-Dichloropropene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 cis-1,3-Dichloropropene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 trans-1,3-Dichloropropene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Ethylbenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1

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Page 87 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-107816/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107817 Prep Batch: 107816 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Hexachlorobutadiene <58.0 58.0 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 6 Hexane <58.0 58.0 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Isopropylbenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 7 p-Isopropyltoluene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Methylene Chloride <116 116 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 8 Methyl tert-butyl ether <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Naphthalene <58.0 58.0 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 9 N-Propylbenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Styrene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 10 1,1,1,2-Tetrachloroethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,1,2,2-Tetrachloroethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Tetrachloroethene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 11 Toluene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,2,3-Trichlorobenzene <58.0 58.0 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 12 1,2,4-Trichlorobenzene <58.0 58.0 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,1,1-Trichloroethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 13 1,1,2-Trichloroethane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Trichloroethene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 14 Trichlorofluoromethane <46.4 46.4 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,2,3-Trichloropropane <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 15 1,2,4-Trimethylbenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 1,3,5-Trimethylbenzene <11.6 11.6 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Vinyl chloride <34.8 34.8 ug/Kg 11/08/15 10:37 11/08/15 21:29 1 Xylenes, Total <34.8 34.8 ug/Kg 11/08/15 10:37 11/08/15 21:29 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 102 80 - 120 11/08/15 10:37 11/08/15 21:29 1 Dibromofluoromethane (Surr) 94 75 - 125 11/08/15 10:37 11/08/15 21:29 1 Toluene-d8 (Surr) 98 80 - 120 11/08/15 10:37 11/08/15 21:29 1

Lab Sample ID: LCS 310-107816/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107817 Prep Batch: 107816 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Acetone 84.5 97.32 J ug/Kg 115 65 - 150 Benzene 42.3 44.66 ug/Kg 106 55 - 135 Bromobenzene 42.3 44.23 ug/Kg 105 65 - 125 Bromochloromethane 42.3 46.55 ug/Kg 110 65 - 130 Bromodichloromethane 42.3 46.05 ug/Kg 109 65 - 130 Bromoform 42.3 44.13 ug/Kg 104 50 - 135 2-Butanone (MEK) 84.5 85.82 J ug/Kg 102 50 - 145 n-Butylbenzene 42.3 35.83 ug/Kg 85 55 - 130 sec-Butylbenzene 42.3 40.73 ug/Kg 96 60 - 125 tert-Butylbenzene 42.3 42.11 ug/Kg 100 55 - 125 Carbon disulfide 42.3 42.37 ug/Kg 100 40 - 135 Carbon tetrachloride 42.3 47.45 ug/Kg 112 55 - 130 Chlorobenzene 42.3 42.97 ug/Kg 102 60 - 120

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Page 88 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-107816/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107817 Prep Batch: 107816 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Chlorodibromomethane 42.3 44.61 ug/Kg 106 55 - 130 6 Chloroform 42.3 45.54 ug/Kg 108 65 - 130 2-Chlorotoluene 42.3 41.49 ug/Kg 98 60 - 125 7 4-Chlorotoluene 42.3 41.34 ug/Kg 98 60 - 125 1,2-Dibromo-3-Chloropropane 42.3 45.58 J ug/Kg 108 50 - 140 8 1,2-Dibromoethane (EDB) 42.3 44.57 J ug/Kg 105 55 - 140 Dibromomethane 42.3 45.38 ug/Kg 107 65 - 135 9 1,2-Dichlorobenzene 42.3 40.99 ug/Kg 97 65 - 120 1,3-Dichlorobenzene 42.3 39.09 ug/Kg 92 60 - 125 10 1,4-Dichlorobenzene 42.3 39.28 ug/Kg 93 60 - 125 1,1-Dichloroethane 42.3 44.61 ug/Kg 106 55 - 135 1,2-Dichloroethane 42.3 45.90 ug/Kg 109 60 - 140 11 1,1-Dichloroethene 42.3 44.83 ug/Kg 106 50 - 145 cis-1,2-Dichloroethene 42.3 46.58 ug/Kg 110 60 - 135 12 trans-1,2-Dichloroethene 42.3 44.04 ug/Kg 104 55 - 135 1,2-Dichloropropane 42.3 44.09 ug/Kg 104 55 - 130 13 1,3-Dichloropropane 42.3 43.84 ug/Kg 104 55 - 140 2,2-Dichloropropane 42.3 46.12 ug/Kg 109 40 - 135 14 1,1-Dichloropropene 42.3 43.50 ug/Kg 103 55 - 130 cis-1,3-Dichloropropene 42.3 42.48 ug/Kg 101 50 - 115 15 trans-1,3-Dichloropropene 42.3 43.22 ug/Kg 102 55 - 130 Ethylbenzene 42.3 43.43 ug/Kg 103 60 - 125 Hexachlorobutadiene 42.3 38.21 J ug/Kg 90 40 - 135 Hexane 42.3 34.84 J ug/Kg 82 45 - 140 Isopropylbenzene 42.3 43.95 ug/Kg 104 60 - 125 p-Isopropyltoluene 42.3 39.53 ug/Kg 94 60 - 120 Methylene Chloride 42.3 48.77 J ug/Kg 115 55 - 145 Methyl tert-butyl ether 42.3 46.08 ug/Kg 109 55 - 130 Naphthalene 42.3 42.53 J ug/Kg 101 50 - 130 N-Propylbenzene 42.3 40.76 ug/Kg 96 50 - 125 Styrene 42.3 43.49 ug/Kg 103 60 - 125 1,1,1,2-Tetrachloroethane 42.3 46.62 ug/Kg 110 65 - 125 1,1,2,2-Tetrachloroethane 42.3 42.56 ug/Kg 101 60 - 125 Tetrachloroethene 42.3 46.53 ug/Kg 110 55 - 125 Toluene 42.3 43.36 ug/Kg 103 60 - 130 1,2,3-Trichlorobenzene 42.3 37.89 J ug/Kg 90 50 - 130 1,2,4-Trichlorobenzene 42.3 35.05 J ug/Kg 83 45 - 135 1,1,1-Trichloroethane 42.3 49.43 ug/Kg 117 60 - 125 1,1,2-Trichloroethane 42.3 42.71 ug/Kg 101 55 - 135 Trichloroethene 42.3 45.96 ug/Kg 109 60 - 130 1,2,3-Trichloropropane 42.3 45.65 ug/Kg 108 50 - 145 1,2,4-Trimethylbenzene 42.3 38.07 ug/Kg 90 55 - 125 1,3,5-Trimethylbenzene 42.3 40.65 ug/Kg 96 50 - 130 Xylenes, Total 84.5 84.44 ug/Kg 100 50 - 130

LCS LCS Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 102 80 - 120 Dibromofluoromethane (Surr) 101 75 - 125

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Page 89 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-107816/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107817 Prep Batch: 107816 5 LCS LCS Surrogate %Recovery Qualifier Limits 6 Toluene-d8 (Surr) 99 80 - 120

Lab Sample ID: 310-68161-11 MS Client Sample ID: B-20E 0-4' 7 Matrix: Soil Prep Type: Total/NA Analysis Batch: 107817 Prep Batch: 107816 8 Sample Sample Spike MS MS %Rec. Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 9 Acetone <126 F1 106 260.3 F1 ug/Kg ☼ 245 55 - 150 Benzene <12.6 53.0 55.54 ug/Kg ☼ 105 40 - 135 10 Bromobenzene <12.6 53.0 51.81 ug/Kg ☼ 98 30 - 125 Bromochloromethane <12.6 53.0 57.27 ug/Kg ☼ 108 55 - 130 11 Bromodichloromethane <12.6 53.0 55.99 ug/Kg ☼ 106 50 - 130 Bromoform <25.2 53.0 52.90 ug/Kg ☼ 100 35 - 135 12 2-Butanone (MEK) <126 106 <133 ug/Kg ☼ 87 40 - 145 n-Butylbenzene <12.6 53.0 47.46 ug/Kg ☼ 90 20 - 130 13 sec-Butylbenzene <12.6 53.0 53.03 ug/Kg ☼ 99 25 - 125 tert-Butylbenzene <12.6 53.0 55.00 ug/Kg ☼ 104 25 - 125 Carbon disulfide <12.6 53.0 48.69 ug/Kg ☼ 90 35 - 135 14 Carbon tetrachloride <12.6 53.0 58.76 ug/Kg ☼ 111 45 - 130 Chlorobenzene <12.6 53.0 53.11 ug/Kg ☼ 100 35 - 120 15 Chlorodibromomethane <12.6 53.0 53.78 ug/Kg ☼ 101 45 - 130 Chloroform <12.6 53.0 57.28 ug/Kg ☼ 108 55 - 130 2-Chlorotoluene <12.6 53.0 50.23 ug/Kg ☼ 95 25 - 125 4-Chlorotoluene <12.6 53.0 50.02 ug/Kg ☼ 94 25 - 125 1,2-Dibromo-3-Chloropropane <126 53.0 <133 ug/Kg ☼ 85 35 - 140 1,2-Dibromoethane (EDB) <126 53.0 <133 ug/Kg ☼ 104 45 - 140 Dibromomethane <12.6 53.0 54.52 ug/Kg ☼ 103 50 - 135 1,2-Dichlorobenzene <12.6 53.0 50.88 ug/Kg ☼ 96 25 - 120 1,3-Dichlorobenzene <12.6 53.0 49.80 ug/Kg ☼ 94 25 - 125 1,4-Dichlorobenzene <12.6 53.0 51.06 ug/Kg ☼ 96 20 - 125 1,1-Dichloroethane <12.6 53.0 55.71 ug/Kg ☼ 105 50 - 135 1,2-Dichloroethane <12.6 53.0 56.41 ug/Kg ☼ 106 50 - 140 1,1-Dichloroethene <12.6 53.0 54.60 ug/Kg ☼ 103 45 - 145 cis-1,2-Dichloroethene <12.6 53.0 56.72 ug/Kg ☼ 107 50 - 135 trans-1,2-Dichloroethene <12.6 53.0 55.04 ug/Kg ☼ 104 45 - 135 1,2-Dichloropropane <12.6 53.0 52.38 ug/Kg ☼ 99 50 - 130 1,3-Dichloropropane <12.6 53.0 54.93 ug/Kg ☼ 104 45 - 140 2,2-Dichloropropane <50.5 53.0 55.25 ug/Kg ☼ 104 40 - 135 1,1-Dichloropropene <12.6 53.0 53.60 ug/Kg ☼ 101 40 - 130 cis-1,3-Dichloropropene <12.6 53.0 51.56 ug/Kg ☼ 97 35 - 115 trans-1,3-Dichloropropene <12.6 53.0 52.28 ug/Kg ☼ 99 35 - 130 Ethylbenzene <12.6 53.0 53.28 ug/Kg ☼ 100 30 - 125 Hexachlorobutadiene <63.1 53.0 <66.3 ug/Kg ☼ 87 10 - 135 Hexane <63.1 53.0 <66.3 ug/Kg ☼ 80 20 - 140 Isopropylbenzene <12.6 53.0 54.01 ug/Kg ☼ 102 25 - 125 p-Isopropyltoluene <12.6 53.0 50.85 ug/Kg ☼ 96 20 - 120 Methylene Chloride <126 53.0 <133 ug/Kg ☼ 88 35 - 145 Methyl tert-butyl ether <12.6 53.0 55.72 ug/Kg ☼ 105 55 - 130

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Page 90 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: 310-68161-11 MS Client Sample ID: B-20E 0-4' Matrix: Soil Prep Type: Total/NA 4 Analysis Batch: 107817 Prep Batch: 107816 Sample Sample Spike MS MS %Rec. 5 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Naphthalene <63.1 53.0 <66.3 ug/Kg ☼ 77 15 - 130 6 N-Propylbenzene <12.6 53.0 50.08 ug/Kg ☼ 93 20 - 125 Styrene <12.6 53.0 52.29 ug/Kg ☼ 99 20 - 125 7 1,1,1,2-Tetrachloroethane <12.6 53.0 56.25 ug/Kg ☼ 106 45 - 120 1,1,2,2-Tetrachloroethane <12.6 53.0 50.27 ug/Kg ☼ 95 40 - 125 8 Tetrachloroethene <12.6 53.0 57.30 ug/Kg ☼ 108 30 - 125 Toluene <12.6 53.0 53.58 ug/Kg ☼ 101 35 - 130 9 1,2,3-Trichlorobenzene <63.1 53.0 <66.3 ug/Kg ☼ 74 10 - 130 1,2,4-Trichlorobenzene <63.1 53.0 <66.3 ug/Kg ☼ 73 15 - 135 10 1,1,1-Trichloroethane <12.6 53.0 57.62 ug/Kg ☼ 109 45 - 125 1,1,2-Trichloroethane <12.6 53.0 52.16 ug/Kg ☼ 98 45 - 135 Trichloroethene <12.6 53.0 56.44 ug/Kg ☼ 106 40 - 130 11 1,2,3-Trichloropropane <12.6 53.0 54.57 ug/Kg ☼ 103 50 - 145 1,2,4-Trimethylbenzene <12.6 53.0 50.63 ug/Kg ☼ 95 20 - 125 12 1,3,5-Trimethylbenzene <12.6 53.0 53.78 ug/Kg ☼ 99 20 - 130 Xylenes, Total <37.8 106 105.7 ug/Kg ☼ 100 30 - 130 13 MS MS 14 Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 98 80 - 120 Dibromofluoromethane (Surr) 97 75 - 125 15 Toluene-d8 (Surr) 99 80 - 120

Lab Sample ID: 310-68161-11 MSD Client Sample ID: B-20E 0-4' Matrix: Soil Prep Type: Total/NA Analysis Batch: 107817 Prep Batch: 107816 Sample Sample Spike MSD MSD %Rec. RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone <126 F1 99.2 232.8 F1 ug/Kg ☼ 235 55 - 150 11 40 Benzene <12.6 49.6 50.46 ug/Kg ☼ 102 40 - 135 10 40 Bromobenzene <12.6 49.6 48.40 ug/Kg ☼ 98 30 - 125 7 40 Bromochloromethane <12.6 49.6 53.76 ug/Kg ☼ 108 55 - 130 6 35 Bromodichloromethane <12.6 49.6 52.44 ug/Kg ☼ 106 50 - 130 7 35 Bromoform <25.2 49.6 48.67 ug/Kg ☼ 98 35 - 135 8 40 2-Butanone (MEK) <126 99.2 <124 ug/Kg ☼ 80 40 - 145 15 40 n-Butylbenzene <12.6 49.6 42.76 ug/Kg ☼ 86 20 - 130 10 40 sec-Butylbenzene <12.6 49.6 47.60 ug/Kg ☼ 95 25 - 125 11 40 tert-Butylbenzene <12.6 49.6 48.97 ug/Kg ☼ 99 25 - 125 12 40 Carbon disulfide <12.6 49.6 43.88 ug/Kg ☼ 86 35 - 135 10 40 Carbon tetrachloride <12.6 49.6 53.93 ug/Kg ☼ 109 45 - 130 9 35 Chlorobenzene <12.6 49.6 49.91 ug/Kg ☼ 101 35 - 120 6 35 Chlorodibromomethane <12.6 49.6 50.03 ug/Kg ☼ 101 45 - 130 7 40 Chloroform <12.6 49.6 51.67 ug/Kg ☼ 104 55 - 130 10 35 2-Chlorotoluene <12.6 49.6 47.16 ug/Kg ☼ 95 25 - 125 6 40 4-Chlorotoluene <12.6 49.6 46.24 ug/Kg ☼ 93 25 - 125 8 40 1,2-Dibromo-3-Chloropropane <126 49.6 <124 ug/Kg ☼ 100 35 - 140 9 40 1,2-Dibromoethane (EDB) <126 49.6 <124 ug/Kg ☼ 105 45 - 140 6 35 Dibromomethane <12.6 49.6 49.83 ug/Kg ☼ 100 50 - 135 9 35 1,2-Dichlorobenzene <12.6 49.6 44.68 ug/Kg ☼ 90 25 - 120 13 40

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Page 91 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: 310-68161-11 MSD Client Sample ID: B-20E 0-4' Matrix: Soil Prep Type: Total/NA 4 Analysis Batch: 107817 Prep Batch: 107816 Sample Sample Spike MSD MSD %Rec. RPD 5 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit 1,3-Dichlorobenzene <12.6 49.6 43.78 ug/Kg ☼ 88 25 - 125 13 40 6 1,4-Dichlorobenzene <12.6 49.6 44.05 ug/Kg ☼ 89 20 - 125 15 40 1,1-Dichloroethane <12.6 49.6 51.14 ug/Kg ☼ 103 50 - 135 9 35 7 1,2-Dichloroethane <12.6 49.6 53.88 ug/Kg ☼ 109 50 - 140 5 40 1,1-Dichloroethene <12.6 49.6 48.41 ug/Kg ☼ 98 45 - 145 12 35 8 cis-1,2-Dichloroethene <12.6 49.6 50.67 ug/Kg ☼ 102 50 - 135 11 35 trans-1,2-Dichloroethene <12.6 49.6 49.22 ug/Kg ☼ 99 45 - 135 11 40 9 1,2-Dichloropropane <12.6 49.6 49.25 ug/Kg ☼ 99 50 - 130 6 35 1,3-Dichloropropane <12.6 49.6 50.81 ug/Kg ☼ 102 45 - 140 8 40 10 2,2-Dichloropropane <50.5 49.6 52.18 ug/Kg ☼ 105 40 - 135 6 35 1,1-Dichloropropene <12.6 49.6 49.51 ug/Kg ☼ 100 40 - 130 8 35 cis-1,3-Dichloropropene <12.6 49.6 48.85 ug/Kg ☼ 98 35 - 115 5 40 11 trans-1,3-Dichloropropene <12.6 49.6 47.85 ug/Kg ☼ 96 35 - 130 9 40 Ethylbenzene <12.6 49.6 49.54 ug/Kg ☼ 100 30 - 125 7 40 12 Hexachlorobutadiene <63.1 49.6 <62.0 ug/Kg ☼ 84 10 - 135 10 40 Hexane <63.1 49.6 <62.0 ug/Kg ☼ 77 20 - 140 10 40 13 Isopropylbenzene <12.6 49.6 48.77 ug/Kg ☼ 98 25 - 125 10 40 p-Isopropyltoluene <12.6 49.6 44.62 ug/Kg ☼ 90 20 - 120 13 40 14 Methylene Chloride <126 49.6 <124 ug/Kg ☼ 84 35 - 145 9 35 Methyl tert-butyl ether <12.6 49.6 52.97 ug/Kg ☼ 107 55 - 130 5 40 15 Naphthalene <63.1 49.6 <62.0 ug/Kg ☼ 72 15 - 130 14 40 N-Propylbenzene <12.6 49.6 46.28 ug/Kg ☼ 92 20 - 125 8 40 Styrene <12.6 49.6 46.89 ug/Kg ☼ 95 20 - 125 11 40 1,1,1,2-Tetrachloroethane <12.6 49.6 52.66 ug/Kg ☼ 106 45 - 120 7 35 1,1,2,2-Tetrachloroethane <12.6 49.6 46.32 ug/Kg ☼ 93 40 - 125 8 40 Tetrachloroethene <12.6 49.6 51.65 ug/Kg ☼ 104 30 - 125 10 40 Toluene <12.6 49.6 49.73 ug/Kg ☼ 100 35 - 130 7 40 1,2,3-Trichlorobenzene <63.1 49.6 <62.0 ug/Kg ☼ 67 10 - 130 17 40 1,2,4-Trichlorobenzene <63.1 49.6 <62.0 ug/Kg ☼ 68 15 - 135 14 40 1,1,1-Trichloroethane <12.6 49.6 54.80 ug/Kg ☼ 110 45 - 125 5 35 1,1,2-Trichloroethane <12.6 49.6 48.89 ug/Kg ☼ 99 45 - 135 6 40 Trichloroethene <12.6 49.6 51.44 ug/Kg ☼ 104 40 - 130 9 35 1,2,3-Trichloropropane <12.6 49.6 48.26 ug/Kg ☼ 97 50 - 145 12 40 1,2,4-Trimethylbenzene <12.6 49.6 44.93 ug/Kg ☼ 91 20 - 125 12 40 1,3,5-Trimethylbenzene <12.6 49.6 48.00 ug/Kg ☼ 94 20 - 130 11 35 Xylenes, Total <37.8 99.2 96.18 ug/Kg ☼ 97 30 - 130 9 40

MSD MSD Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 99 80 - 120 Dibromofluoromethane (Surr) 97 75 - 125 Toluene-d8 (Surr) 99 80 - 120

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Page 92 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) 3 Lab Sample ID: MB 310-107521/1-A Client Sample ID: Method Blank 4 Matrix: Water Prep Type: Total/NA Analysis Batch: 107846 Prep Batch: 107521 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Anthracene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 6 Benzo[a]anthracene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Benzo[a]pyrene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 7 Benzidine <100 100 ug/L 11/05/15 11:12 11/09/15 17:22 1 Benzo[b]fluoranthene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 8 Benzo[g,h,i]perylene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Benzo[k]fluoranthene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 9 Acenaphthene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Acenaphthylene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 10 Benzyl alcohol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Butyl benzyl phthalate <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 11 Bis(2-chloroethyl)ether <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Bis(2-chloroethoxy)methane <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 12 Bis(2-ethylhexyl) phthalate <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 bis (2-chloroisopropyl) ether <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 4-Bromophenyl phenyl ether <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 13 Carbazole <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 4-Chloroaniline <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 14 2-Chloronaphthalene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 4-Chlorophenyl phenyl ether <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 15 Chrysene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Dibenz(a,h)anthracene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Dibenzofuran <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Di-n-butyl phthalate <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 1,2-Dichlorobenzene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 1,3-Dichlorobenzene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 1,4-Dichlorobenzene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 3,3'-Dichlorobenzidine <50.0 50.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Diethyl phthalate <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Dimethyl phthalate <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 2,4-Dinitrotoluene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 2,6-Dinitrotoluene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Fluorene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Hexachlorobenzene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Hexachlorobutadiene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Hexachlorocyclopentadiene <20.0 20.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Hexachloroethane <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Di-n-octyl phthalate <20.0 20.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Fluoranthene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Indeno[1,2,3-cd]pyrene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Isophorone <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 2-Methylnaphthalene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Naphthalene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 2-Nitroaniline <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 3-Nitroaniline <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 4-Nitroaniline <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Nitrobenzene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 N-Nitrosodiphenylamine <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1

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Page 93 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: MB 310-107521/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107846 Prep Batch: 107521 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac N-Nitrosodi-n-propylamine <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 6 N-Nitrosodimethylamine <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Phenanthrene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 7 Pyrene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Pyridine <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 8 1,2,4-Trichlorobenzene <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Benzoic acid <100 100 ug/L 11/05/15 11:12 11/09/15 17:22 1 9 4-Chloro-3-methylphenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 2-Chlorophenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 10 Total Cresols <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 2,4-Dichlorophenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 2,4-Dimethylphenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 11 2,4-Dinitrophenol <20.0 20.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 4,6-Dinitro-2-methylphenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 12 2-Methylphenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Methylphenol, 3 & 4 <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 13 2-Nitrophenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 4-Nitrophenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 14 Pentachlorophenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 Phenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 15 2,4,5-Trichlorophenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1 2,4,6-Trichlorophenol <10.0 10.0 ug/L 11/05/15 11:12 11/09/15 17:22 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 26 15 - 50 11/05/15 11:12 11/09/15 17:22 1 Phenol-d6 (Surr) 18 10 - 35 11/05/15 11:12 11/09/15 17:22 1 Nitrobenzene-d5 (Surr) 47 25 - 80 11/05/15 11:12 11/09/15 17:22 1 2-Fluorobiphenyl (Surr) 45 25 - 80 11/05/15 11:12 11/09/15 17:22 1 2,4,6-Tribromophenol (Surr) 53 25 - 100 11/05/15 11:12 11/09/15 17:22 1 Terphenyl-d14 (Surr) 75 30 - 105 11/05/15 11:12 11/09/15 17:22 1

Lab Sample ID: LCS 310-107521/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 107846 Prep Batch: 107521 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Anthracene 50.0 31.65 ug/L 63 35 - 95 Benzo[a]anthracene 50.0 33.25 ug/L 67 30 - 100 Benzo[a]pyrene 50.0 33.20 ug/L 66 35 - 105 Benzo[b]fluoranthene 50.0 30.43 ug/L 61 30 - 100 Benzo[g,h,i]perylene 50.0 33.75 ug/L 67 30 - 105 Benzo[k]fluoranthene 50.0 32.78 ug/L 66 30 - 95 Acenaphthene 50.0 24.47 ug/L 49 25 - 80 Acenaphthylene 50.0 25.30 ug/L 51 25 - 85 Benzyl alcohol 50.0 19.96 ug/L 40 10 - 75 Butyl benzyl phthalate 50.0 33.21 ug/L 66 35 - 100 Bis(2-chloroethyl)ether 50.0 21.73 ug/L 43 20 - 75 Bis(2-chloroethoxy)methane 50.0 23.82 ug/L 48 25 - 80

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Page 94 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: LCS 310-107521/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107846 Prep Batch: 107521 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Bis(2-ethylhexyl) phthalate 50.0 41.94 ug/L 84 35 - 95 6 bis (2-chloroisopropyl) ether 50.0 21.77 ug/L 44 15 - 75 4-Bromophenyl phenyl ether 50.0 31.69 ug/L 63 30 - 90 7 Carbazole 50.0 32.60 ug/L 65 30 - 95 4-Chloroaniline 50.0 22.99 ug/L 46 20 - 85 8 2-Chloronaphthalene 50.0 23.57 ug/L 47 25 - 80 4-Chlorophenyl phenyl ether 50.0 27.14 ug/L 54 30 - 85 9 Chrysene 50.0 33.71 ug/L 67 30 - 95 Dibenz(a,h)anthracene 50.0 34.76 ug/L 70 30 - 100 10 Dibenzofuran 50.0 25.55 ug/L 51 30 - 85 Di-n-butyl phthalate 50.0 33.25 ug/L 66 30 - 100 1,2-Dichlorobenzene 50.0 18.83 ug/L 38 20 - 60 11 1,3-Dichlorobenzene 50.0 18.12 ug/L 36 20 - 60 1,4-Dichlorobenzene 50.0 18.64 ug/L 37 20 - 60 12 Diethyl phthalate 50.0 31.31 ug/L 63 30 - 90 Dimethyl phthalate 50.0 29.91 ug/L 60 25 - 95 13 2,4-Dinitrotoluene 50.0 29.95 ug/L 60 35 - 90 2,6-Dinitrotoluene 50.0 29.32 ug/L 59 30 - 90 14 Fluorene 50.0 26.50 ug/L 53 25 - 85 Hexachlorobenzene 50.0 29.42 ug/L 59 35 - 90 15 Hexachlorobutadiene 50.0 20.15 ug/L 40 15 - 65 Hexachlorocyclopentadiene 50.0 16.58 J ug/L 33 10 - 75 Hexachloroethane 50.0 18.92 ug/L 38 15 - 60 Di-n-octyl phthalate 50.0 34.73 ug/L 69 30 - 105 Fluoranthene 50.0 31.73 ug/L 63 25 - 100 Indeno[1,2,3-cd]pyrene 50.0 33.64 ug/L 67 30 - 100 Isophorone 50.0 24.72 ug/L 49 25 - 85 2-Methylnaphthalene 50.0 22.17 ug/L 44 20 - 75 Naphthalene 50.0 21.41 ug/L 43 20 - 70 2-Nitroaniline 50.0 29.47 ug/L 59 30 - 85 3-Nitroaniline 50.0 29.75 ug/L 59 30 - 95 4-Nitroaniline 50.0 32.68 ug/L 65 30 - 90 Nitrobenzene 50.0 23.41 ug/L 47 20 - 75 N-Nitrosodiphenylamine 100 61.19 ug/L 61 30 - 95 N-Nitrosodi-n-propylamine 50.0 23.99 ug/L 48 25 - 80 N-Nitrosodimethylamine 50.0 14.87 ug/L 30 10 - 55 Phenanthrene 50.0 31.33 ug/L 63 30 - 90 Pyrene 50.0 34.34 ug/L 69 25 - 100 Pyridine 50.0 13.80 ug/L 28 10 - 50 1,2,4-Trichlorobenzene 50.0 20.70 ug/L 41 20 - 65 4-Chloro-3-methylphenol 50.0 24.17 ug/L 48 25 - 90 2-Chlorophenol 50.0 19.91 ug/L 40 20 - 70 2,4-Dichlorophenol 50.0 22.38 ug/L 45 25 - 80 2,4-Dimethylphenol 50.0 21.87 ug/L 44 20 - 80 2,4-Dinitrophenol 100 41.92 ug/L 42 20 - 105 4,6-Dinitro-2-methylphenol 100 60.35 ug/L 60 30 - 105 2-Methylphenol 50.0 18.40 ug/L 37 20 - 65 Methylphenol, 3 & 4 50.0 17.10 ug/L 34 15 - 65

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Page 95 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: LCS 310-107521/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107846 Prep Batch: 107521 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits 2-Nitrophenol 50.0 23.63 ug/L 47 25 - 80 6 4-Nitrophenol 100 25.06 ug/L 25 10 - 45 Pentachlorophenol 100 57.32 ug/L 57 25 - 85 7 Phenol 50.0 9.572 J ug/L 19 10 - 35 2,4,5-Trichlorophenol 50.0 26.57 ug/L 53 30 - 85 8 2,4,6-Trichlorophenol 50.0 26.49 ug/L 53 30 - 85

LCS LCS 9 Surrogate %Recovery Qualifier Limits 2-Fluorophenol (Surr) 26 15 - 50 10 Phenol-d6 (Surr) 18 10 - 35 Nitrobenzene-d5 (Surr) 49 25 - 80 11 2-Fluorobiphenyl (Surr) 49 25 - 80 2,4,6-Tribromophenol (Surr) 60 25 - 100 12 Terphenyl-d14 (Surr) 75 30 - 105 13 Lab Sample ID: LCSD 310-107521/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 107846 Prep Batch: 107521 14 Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 15 Anthracene 50.0 26.65 ug/L 53 35 - 95 17 35 Benzo[a]anthracene 50.0 31.90 ug/L 64 30 - 100 4 35 Benzo[a]pyrene 50.0 31.62 ug/L 63 35 - 105 5 35 Benzo[b]fluoranthene 50.0 29.03 ug/L 58 30 - 100 5 35 Benzo[g,h,i]perylene 50.0 31.70 ug/L 63 30 - 105 6 35 Benzo[k]fluoranthene 50.0 31.48 ug/L 63 30 - 95 4 35 Acenaphthene 50.0 23.66 ug/L 47 25 - 80 3 35 Acenaphthylene 50.0 23.83 ug/L 48 25 - 85 6 35 Benzyl alcohol 50.0 20.59 ug/L 41 10 - 75 3 35 Butyl benzyl phthalate 50.0 30.59 ug/L 61 35 - 100 8 35 Bis(2-chloroethyl)ether 50.0 21.74 ug/L 43 20 - 75 0 30 Bis(2-chloroethoxy)methane 50.0 23.01 ug/L 46 25 - 80 3 35 Bis(2-ethylhexyl) phthalate 50.0 42.30 ug/L 85 35 - 95 1 35 bis (2-chloroisopropyl) ether 50.0 21.30 ug/L 43 15 - 75 2 35 4-Bromophenyl phenyl ether 50.0 26.36 ug/L 53 30 - 90 18 30 Carbazole 50.0 28.86 ug/L 58 30 - 95 12 35 4-Chloroaniline 50.0 23.38 ug/L 47 20 - 85 2 35 2-Chloronaphthalene 50.0 22.83 ug/L 46 25 - 80 3 35 4-Chlorophenyl phenyl ether 50.0 24.15 ug/L 48 30 - 85 12 35 Chrysene 50.0 31.69 ug/L 63 30 - 95 6 35 Dibenz(a,h)anthracene 50.0 32.46 ug/L 65 30 - 100 7 35 Dibenzofuran 50.0 23.96 ug/L 48 30 - 85 6 30 Di-n-butyl phthalate 50.0 29.88 ug/L 60 30 - 100 11 35 1,2-Dichlorobenzene 50.0 18.51 ug/L 37 20 - 60 2 30 1,3-Dichlorobenzene 50.0 18.38 ug/L 37 20 - 60 1 35 1,4-Dichlorobenzene 50.0 18.49 ug/L 37 20 - 60 1 30 Diethyl phthalate 50.0 25.87 ug/L 52 30 - 90 19 30 Dimethyl phthalate 50.0 25.00 ug/L 50 25 - 95 18 35

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Page 96 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: LCSD 310-107521/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107846 Prep Batch: 107521 Spike LCSD LCSD %Rec. RPD 5 Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 2,4-Dinitrotoluene 50.0 25.58 ug/L 51 35 - 90 16 35 6 2,6-Dinitrotoluene 50.0 24.56 ug/L 49 30 - 90 18 35 Fluorene 50.0 23.74 ug/L 47 25 - 85 11 35 7 Hexachlorobenzene 50.0 25.98 ug/L 52 35 - 90 12 35 Hexachlorobutadiene 50.0 20.65 ug/L 41 15 - 65 2 35 8 Hexachlorocyclopentadiene 50.0 16.83 J ug/L 34 10 - 75 2 35 Hexachloroethane 50.0 18.65 ug/L 37 15 - 60 1 35 9 Di-n-octyl phthalate 50.0 33.53 ug/L 67 30 - 105 4 35 Fluoranthene 50.0 28.54 ug/L 57 25 - 100 11 35 10 Indeno[1,2,3-cd]pyrene 50.0 31.66 ug/L 63 30 - 100 6 35 Isophorone 50.0 24.42 ug/L 49 25 - 85 1 35 2-Methylnaphthalene 50.0 21.74 ug/L 43 20 - 75 2 35 11 Naphthalene 50.0 21.49 ug/L 43 20 - 70 0 35 2-Nitroaniline 50.0 25.24 ug/L 50 30 - 85 15 35 12 3-Nitroaniline 50.0 27.06 ug/L 54 30 - 95 9 35 4-Nitroaniline 50.0 28.91 ug/L 58 30 - 90 12 35 13 Nitrobenzene 50.0 22.69 ug/L 45 20 - 75 3 35 N-Nitrosodiphenylamine 100 49.88 ug/L 50 30 - 95 20 35 14 N-Nitrosodi-n-propylamine 50.0 23.66 ug/L 47 25 - 80 1 30 N-Nitrosodimethylamine 50.0 15.58 ug/L 31 10 - 55 5 30 15 Phenanthrene 50.0 26.50 ug/L 53 30 - 90 17 35 Pyrene 50.0 30.66 ug/L 61 25 - 100 11 35 Pyridine 50.0 13.04 ug/L 26 10 - 50 6 35 1,2,4-Trichlorobenzene 50.0 20.75 ug/L 42 20 - 65 0 30 4-Chloro-3-methylphenol 50.0 23.90 ug/L 48 25 - 90 1 35 2-Chlorophenol 50.0 20.08 ug/L 40 20 - 70 1 35 2,4-Dichlorophenol 50.0 22.16 ug/L 44 25 - 80 1 35 2,4-Dimethylphenol 50.0 21.48 ug/L 43 20 - 80 2 35 2,4-Dinitrophenol 100 37.88 ug/L 38 20 - 105 10 35 4,6-Dinitro-2-methylphenol 100 54.90 ug/L 55 30 - 105 9 35 2-Methylphenol 50.0 19.17 ug/L 38 20 - 65 4 35 Methylphenol, 3 & 4 50.0 17.67 ug/L 35 15 - 65 3 35 2-Nitrophenol 50.0 23.11 ug/L 46 25 - 80 2 35 4-Nitrophenol 100 24.60 ug/L 25 10 - 45 2 35 Pentachlorophenol 100 51.45 ug/L 51 25 - 85 11 35 Phenol 50.0 10.05 ug/L 20 10 - 35 5 35 2,4,5-Trichlorophenol 50.0 24.40 ug/L 49 30 - 85 8 35 2,4,6-Trichlorophenol 50.0 25.04 ug/L 50 30 - 85 6 35

LCSD LCSD Surrogate %Recovery Qualifier Limits 2-Fluorophenol (Surr) 27 15 - 50 Phenol-d6 (Surr) 19 10 - 35 Nitrobenzene-d5 (Surr) 48 25 - 80 2-Fluorobiphenyl (Surr) 48 25 - 80 2,4,6-Tribromophenol (Surr) 52 25 - 100 Terphenyl-d14 (Surr) 70 30 - 105

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Page 97 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: MB 310-107540/1-A Client Sample ID: Method Blank 4 Matrix: Solid Prep Type: Total/NA Analysis Batch: 107672 Prep Batch: 107540 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Anthracene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 6 Benzo[a]anthracene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Benzo[a]pyrene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 7 Benzidine <3300 3300 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Benzo[b]fluoranthene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 8 Benzo[g,h,i]perylene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Benzo[k]fluoranthene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 9 Acenaphthene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Acenaphthylene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 10 Benzyl alcohol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Butyl benzyl phthalate <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 11 Bis(2-chloroethyl)ether <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Bis(2-chloroethoxy)methane <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 12 Bis(2-ethylhexyl) phthalate <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 bis (2-chloroisopropyl) ether <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 4-Bromophenyl phenyl ether <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 13 Carbazole <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 4-Chloroaniline <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 14 2-Chloronaphthalene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 4-Chlorophenyl phenyl ether <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 15 Chrysene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Dibenz(a,h)anthracene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Dibenzofuran <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Di-n-butyl phthalate <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 1,2-Dichlorobenzene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 1,3-Dichlorobenzene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 1,4-Dichlorobenzene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 3,3'-Dichlorobenzidine <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Diethyl phthalate <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Dimethyl phthalate <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 2,4-Dinitrotoluene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 2,6-Dinitrotoluene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Fluorene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Hexachlorobenzene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Hexachlorobutadiene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Hexachlorocyclopentadiene <660 660 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Hexachloroethane <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Di-n-octyl phthalate <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Fluoranthene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Indeno[1,2,3-cd]pyrene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Isophorone <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 2-Methylnaphthalene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Naphthalene <200 200 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 2-Nitroaniline <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 3-Nitroaniline <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 4-Nitroaniline <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Nitrobenzene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 N-Nitrosodiphenylamine <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1

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Page 98 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: MB 310-107540/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107672 Prep Batch: 107540 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac N-Nitrosodi-n-propylamine <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 6 N-Nitrosodimethylamine <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Phenanthrene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 7 Pyrene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Pyridine <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 8 1,2,4-Trichlorobenzene <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Benzoic acid <660 660 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 9 4-Chloro-3-methylphenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 2-Chlorophenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 10 Total Cresols <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 2,4-Dichlorophenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 2,4-Dimethylphenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 11 2,4-Dinitrophenol <660 660 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 4,6-Dinitro-2-methylphenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 12 2-Methylphenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Methylphenol, 3 & 4 <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 13 2-Nitrophenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 4-Nitrophenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 14 Pentachlorophenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 Phenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 15 2,4,5-Trichlorophenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1 2,4,6-Trichlorophenol <330 330 ug/Kg 11/05/15 11:51 11/06/15 14:38 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 43 15 - 90 11/05/15 11:51 11/06/15 14:38 1 Phenol-d6 (Surr) 47 20 - 90 11/05/15 11:51 11/06/15 14:38 1 Nitrobenzene-d5 (Surr) 45 15 - 90 11/05/15 11:51 11/06/15 14:38 1 2-Fluorobiphenyl (Surr) 45 20 - 90 11/05/15 11:51 11/06/15 14:38 1 2,4,6-Tribromophenol (Surr) 50 25 - 105 11/05/15 11:51 11/06/15 14:38 1 Terphenyl-d14 (Surr) 62 35 - 110 11/05/15 11:51 11/06/15 14:38 1

Lab Sample ID: LCS 310-107540/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107672 Prep Batch: 107540 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Anthracene 2000 1113 ug/Kg 56 30 - 110 Benzo[a]anthracene 2000 1214 ug/Kg 61 40 - 105 Benzo[a]pyrene 2000 1261 ug/Kg 63 45 - 110 Benzo[b]fluoranthene 2000 1152 ug/Kg 58 40 - 110 Benzo[g,h,i]perylene 2000 1173 ug/Kg 59 40 - 105 Benzo[k]fluoranthene 2000 1257 ug/Kg 63 35 - 100 Acenaphthene 2000 935.0 ug/Kg 47 25 - 95 Acenaphthylene 2000 952.4 ug/Kg 48 25 - 95 Benzyl alcohol 2000 963.4 ug/Kg 48 10 - 90 Butyl benzyl phthalate 2000 1235 ug/Kg 62 30 - 115 Bis(2-chloroethyl)ether 2000 899.2 ug/Kg 45 10 - 85 Bis(2-chloroethoxy)methane 2000 932.1 ug/Kg 47 15 - 95

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Page 99 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: LCS 310-107540/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107672 Prep Batch: 107540 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Bis(2-ethylhexyl) phthalate 2000 1328 ug/Kg 66 30 - 110 6 bis (2-chloroisopropyl) ether 2000 920.6 ug/Kg 46 10 - 85 4-Bromophenyl phenyl ether 2000 1093 ug/Kg 55 25 - 110 7 Carbazole 2000 1174 ug/Kg 59 30 - 110 4-Chloroaniline 2000 928.4 ug/Kg 46 15 - 85 8 2-Chloronaphthalene 2000 876.4 ug/Kg 44 20 - 95 4-Chlorophenyl phenyl ether 2000 1041 ug/Kg 52 25 - 100 9 Chrysene 2000 1211 ug/Kg 61 40 - 105 Dibenz(a,h)anthracene 2000 1235 ug/Kg 62 40 - 105 10 Dibenzofuran 2000 975.2 ug/Kg 49 20 - 95 Di-n-butyl phthalate 2000 1274 ug/Kg 64 30 - 125 1,2-Dichlorobenzene 2000 845.2 ug/Kg 42 10 - 80 11 1,3-Dichlorobenzene 2000 828.0 ug/Kg 41 10 - 80 1,4-Dichlorobenzene 2000 836.1 ug/Kg 42 10 - 85 12 Diethyl phthalate 2000 1197 ug/Kg 60 25 - 100 Dimethyl phthalate 2000 1089 ug/Kg 54 25 - 105 13 2,4-Dinitrotoluene 2000 1151 ug/Kg 58 25 - 100 2,6-Dinitrotoluene 2000 1081 ug/Kg 54 25 - 105 14 Fluorene 2000 998.0 ug/Kg 50 30 - 110 Hexachlorobenzene 2000 1064 ug/Kg 53 25 - 100 15 Hexachlorobutadiene 2000 838.0 ug/Kg 42 10 - 85 Hexachlorocyclopentadiene 2000 712.9 ug/Kg 36 10 - 95 Hexachloroethane 2000 841.8 ug/Kg 42 10 - 80 Di-n-octyl phthalate 2000 1367 ug/Kg 68 30 - 120 Fluoranthene 2000 1197 ug/Kg 60 35 - 110 Indeno[1,2,3-cd]pyrene 2000 1195 ug/Kg 60 35 - 105 Isophorone 2000 995.7 ug/Kg 50 15 - 90 2-Methylnaphthalene 2000 924.9 ug/Kg 46 15 - 90 Naphthalene 2000 857.4 ug/Kg 43 15 - 90 2-Nitroaniline 2000 1048 ug/Kg 52 20 - 100 3-Nitroaniline 2000 1110 ug/Kg 56 25 - 95 4-Nitroaniline 2000 1215 ug/Kg 61 25 - 100 Nitrobenzene 2000 910.6 ug/Kg 46 10 - 85 N-Nitrosodiphenylamine 4000 2115 ug/Kg 53 25 - 120 N-Nitrosodi-n-propylamine 2000 1011 ug/Kg 51 10 - 95 N-Nitrosodimethylamine 2000 868.0 ug/Kg 43 10 - 85 Phenanthrene 2000 1089 ug/Kg 54 30 - 105 Pyrene 2000 1158 ug/Kg 58 35 - 110 Pyridine 2000 805.3 ug/Kg 40 10 - 70 1,2,4-Trichlorobenzene 2000 850.2 ug/Kg 43 10 - 90 4-Chloro-3-methylphenol 2000 1007 ug/Kg 50 20 - 105 2-Chlorophenol 2000 897.9 ug/Kg 45 10 - 95 2,4-Dichlorophenol 2000 914.3 ug/Kg 46 15 - 100 2,4-Dimethylphenol 2000 906.1 ug/Kg 45 15 - 90 2,4-Dinitrophenol 4000 1132 ug/Kg 28 10 - 80 4,6-Dinitro-2-methylphenol 4000 2075 ug/Kg 52 10 - 100 2-Methylphenol 2000 946.8 ug/Kg 47 10 - 95 Methylphenol, 3 & 4 2000 953.6 ug/Kg 48 15 - 100

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Page 100 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: LCS 310-107540/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107672 Prep Batch: 107540 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits 2-Nitrophenol 2000 925.4 ug/Kg 46 15 - 95 6 4-Nitrophenol 4000 2412 ug/Kg 60 30 - 105 Pentachlorophenol 4000 2230 ug/Kg 56 25 - 90 7 Phenol 2000 895.3 ug/Kg 45 10 - 95 2,4,5-Trichlorophenol 2000 996.6 ug/Kg 50 25 - 105 8 2,4,6-Trichlorophenol 2000 970.0 ug/Kg 48 20 - 100

LCS LCS 9 Surrogate %Recovery Qualifier Limits 2-Fluorophenol (Surr) 42 15 - 90 10 Phenol-d6 (Surr) 46 20 - 90 Nitrobenzene-d5 (Surr) 45 15 - 90 11 2-Fluorobiphenyl (Surr) 44 20 - 90 2,4,6-Tribromophenol (Surr) 56 25 - 105 12 Terphenyl-d14 (Surr) 63 35 - 110 13 Lab Sample ID: 310-68161-1 MS Client Sample ID: B-8E 0.5-5' Matrix: Soil Prep Type: Total/NA Analysis Batch: 107672 Prep Batch: 107540 14 Sample Sample Spike MS MS %Rec. Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 15 Anthracene <329 3360 1357 ug/Kg ☼ 40 10 - 110 Benzo[a]anthracene <329 3360 1285 ug/Kg ☼ 38 10 - 105 Benzo[a]pyrene <329 3360 1300 ug/Kg ☼ 39 15 - 110 Benzo[b]fluoranthene <329 3360 1174 ug/Kg ☼ 35 10 - 110 Benzo[g,h,i]perylene <329 3360 1204 ug/Kg ☼ 36 15 - 110 Benzo[k]fluoranthene <329 3360 1240 ug/Kg ☼ 37 10 - 105 Acenaphthene <329 3360 1328 ug/Kg ☼ 39 10 - 105 Acenaphthylene <329 3360 1347 ug/Kg ☼ 40 10 - 105 Benzyl alcohol <543 3360 1388 ug/Kg ☼ 41 10 - 90 Butyl benzyl phthalate <543 3360 1177 ug/Kg ☼ 35 15 - 115 Bis(2-chloroethyl)ether <543 3360 1325 ug/Kg ☼ 39 10 - 90 Bis(2-chloroethoxy)methane <543 3360 1428 ug/Kg ☼ 42 10 - 95 Bis(2-ethylhexyl) phthalate <543 3360 1250 ug/Kg ☼ 35 15 - 110 bis (2-chloroisopropyl) ether <543 3360 1325 ug/Kg ☼ 39 10 - 90 4-Bromophenyl phenyl ether <543 3360 1268 ug/Kg ☼ 38 15 - 110 Carbazole <543 3360 1571 ug/Kg ☼ 47 15 - 110 4-Chloroaniline <543 3360 1062 ug/Kg ☼ 32 10 - 90 2-Chloronaphthalene <543 3360 1300 ug/Kg ☼ 39 10 - 100 4-Chlorophenyl phenyl ether <543 3360 1267 ug/Kg ☼ 38 10 - 105 Chrysene <329 3360 1330 ug/Kg ☼ 40 15 - 110 Dibenz(a,h)anthracene <543 3360 1210 ug/Kg ☼ 36 15 - 110 Dibenzofuran <543 3360 1352 ug/Kg ☼ 40 10 - 100 Di-n-butyl phthalate <543 3360 1283 ug/Kg ☼ 38 15 - 125 1,2-Dichlorobenzene <543 3360 1249 ug/Kg ☼ 37 10 - 85 1,3-Dichlorobenzene <543 3360 1256 ug/Kg ☼ 37 10 - 80 1,4-Dichlorobenzene <543 3360 1247 ug/Kg ☼ 37 10 - 85 Diethyl phthalate <543 3360 1168 ug/Kg ☼ 35 10 - 100 Dimethyl phthalate <543 3360 882.2 ug/Kg ☼ 26 10 - 105

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Page 101 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: 310-68161-1 MS Client Sample ID: B-8E 0.5-5' Matrix: Soil Prep Type: Total/NA 4 Analysis Batch: 107672 Prep Batch: 107540 Sample Sample Spike MS MS %Rec. 5 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 2,4-Dinitrotoluene <543 3360 1319 ug/Kg ☼ 39 10 - 100 6 2,6-Dinitrotoluene <543 3360 1445 ug/Kg ☼ 43 10 - 105 Fluorene <329 3360 1327 ug/Kg ☼ 39 10 - 105 7 Hexachlorobenzene <543 3360 1181 ug/Kg ☼ 35 10 - 105 Hexachlorobutadiene <543 3360 1135 ug/Kg ☼ 34 10 - 95 8 Hexachlorocyclopentadiene <1090 3360 <1110 ug/Kg ☼ 26 10 - 95 Hexachloroethane <543 3360 1219 ug/Kg ☼ 36 10 - 95 9 Di-n-octyl phthalate <543 3360 1318 ug/Kg ☼ 39 15 - 120 Fluoranthene <329 3360 1397 ug/Kg ☼ 40 15 - 110 10 Indeno[1,2,3-cd]pyrene <329 3360 1218 ug/Kg ☼ 36 10 - 105 Isophorone <543 3360 1442 ug/Kg ☼ 43 10 - 95 2-Methylnaphthalene <329 3360 1340 ug/Kg ☼ 40 10 - 95 11 Naphthalene <329 3360 1305 ug/Kg ☼ 39 10 - 95 2-Nitroaniline <543 3360 1545 ug/Kg ☼ 46 10 - 100 12 3-Nitroaniline <543 3360 1386 ug/Kg ☼ 41 10 - 95 4-Nitroaniline <543 3360 1207 ug/Kg ☼ 36 10 - 100 13 Nitrobenzene <543 3360 1326 ug/Kg ☼ 39 10 - 95 N-Nitrosodiphenylamine <543 6730 2535 ug/Kg ☼ 38 10 - 120 14 N-Nitrosodi-n-propylamine <543 3360 1489 ug/Kg ☼ 44 10 - 95 N-Nitrosodimethylamine <543 3360 1198 ug/Kg ☼ 36 10 - 90 15 Phenanthrene <543 3360 1412 ug/Kg ☼ 40 15 - 110 Pyrene <543 3360 1320 ug/Kg ☼ 39 15 - 110 Pyridine <543 3360 1168 ug/Kg ☼ 35 10 - 70 1,2,4-Trichlorobenzene <543 3360 1281 ug/Kg ☼ 38 10 - 95 4-Chloro-3-methylphenol <543 F1 F2 3360 <555 F1 ug/Kg ☼ 9 10 - 105 2-Chlorophenol <543 F1 3360 <555 F1 ug/Kg ☼ 0 10 - 95 2,4-Dichlorophenol <543 F1 3360 <555 F1 ug/Kg ☼ 0 10 - 100 2,4-Dimethylphenol <543 F1 3360 <555 ug/Kg ☼ 12 10 - 100 2,4-Dinitrophenol <1090 F1 6730 <1110 F1 ug/Kg ☼ 0 10 - 80 4,6-Dinitro-2-methylphenol <543 F1 6730 <555 F1 ug/Kg ☼ 0 10 - 100 2-Methylphenol <543 F1 F2 3360 <555 F1 ug/Kg ☼ 9 10 - 95 Methylphenol, 3 & 4 <543 F1 3360 <555 F1 ug/Kg ☼ 9 10 - 100 2-Nitrophenol <543 F1 3360 <555 F1 ug/Kg ☼ 4 10 - 95 4-Nitrophenol <543 F1 6730 <555 F1 ug/Kg ☼ 0 10 - 105 Pentachlorophenol <543 F1 6730 <555 F1 ug/Kg ☼ 0 10 - 95 Phenol <543 F1 F2 3360 <555 F1 ug/Kg ☼ 2 10 - 95 2,4,5-Trichlorophenol <543 F1 3360 <555 F1 ug/Kg ☼ 0 10 - 105 2,4,6-Trichlorophenol <543 F1 3360 <555 F1 ug/Kg ☼ 0 10 - 100

MS MS Surrogate %Recovery Qualifier Limits 2-Fluorophenol (Surr) 0.2 X 15 - 90 Phenol-d6 (Surr) 2 X 20 - 90 Nitrobenzene-d5 (Surr) 40 15 - 90 2-Fluorobiphenyl (Surr) 37 20 - 90 2,4,6-Tribromophenol (Surr) 0.2 X 25 - 105 Terphenyl-d14 (Surr) 34 X 35 - 110

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Page 102 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: 310-68161-1 MSD Client Sample ID: B-8E 0.5-5' 4 Matrix: Soil Prep Type: Total/NA Analysis Batch: 107672 Prep Batch: 107540 Sample Sample Spike MSD MSD %Rec. RPD 5 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Anthracene <329 3280 1194 ug/Kg ☼ 36 10 - 110 13 40 6 Benzo[a]anthracene <329 3280 1189 ug/Kg ☼ 36 10 - 105 8 40 Benzo[a]pyrene <329 3280 1214 ug/Kg ☼ 37 15 - 110 7 40 7 Benzo[b]fluoranthene <329 3280 1121 ug/Kg ☼ 34 10 - 110 5 40 Benzo[g,h,i]perylene <329 3280 1074 ug/Kg ☼ 33 15 - 110 11 40 8 Benzo[k]fluoranthene <329 3280 1154 ug/Kg ☼ 35 10 - 105 7 40 Acenaphthene <329 3280 1110 ug/Kg ☼ 34 10 - 105 18 40 9 Acenaphthylene <329 3280 1127 ug/Kg ☼ 34 10 - 105 18 40 Benzyl alcohol <543 3280 1139 ug/Kg ☼ 35 10 - 90 20 40 10 Butyl benzyl phthalate <543 3280 1148 ug/Kg ☼ 35 15 - 115 2 40 Bis(2-chloroethyl)ether <543 3280 1088 ug/Kg ☼ 33 10 - 90 20 40 11 Bis(2-chloroethoxy)methane <543 3280 1173 ug/Kg ☼ 36 10 - 95 20 40 Bis(2-ethylhexyl) phthalate <543 3280 1312 ug/Kg ☼ 38 15 - 110 5 40 12 bis (2-chloroisopropyl) ether <543 3280 1083 ug/Kg ☼ 33 10 - 90 20 40 4-Bromophenyl phenyl ether <543 3280 1117 ug/Kg ☼ 34 15 - 110 13 40 13 Carbazole <543 3280 1323 ug/Kg ☼ 40 15 - 110 17 40 4-Chloroaniline <543 3280 947.1 ug/Kg ☼ 29 10 - 90 11 40 2-Chloronaphthalene <543 3280 1066 ug/Kg ☼ 32 10 - 100 20 40 14 4-Chlorophenyl phenyl ether <543 3280 1141 ug/Kg ☼ 35 10 - 105 10 40 Chrysene <329 3280 1238 ug/Kg ☼ 38 15 - 110 7 40 15 Dibenz(a,h)anthracene <543 3280 1165 ug/Kg ☼ 36 15 - 110 4 40 Dibenzofuran <543 3280 1142 ug/Kg ☼ 35 10 - 100 17 40 Di-n-butyl phthalate <543 3280 1201 ug/Kg ☼ 37 15 - 125 7 40 1,2-Dichlorobenzene <543 3280 1010 ug/Kg ☼ 31 10 - 85 21 40 1,3-Dichlorobenzene <543 3280 972.4 ug/Kg ☼ 30 10 - 80 25 40 1,4-Dichlorobenzene <543 3280 994.7 ug/Kg ☼ 30 10 - 85 22 40 Diethyl phthalate <543 3280 931.6 ug/Kg ☼ 28 10 - 100 23 40 Dimethyl phthalate <543 3280 651.9 ug/Kg ☼ 20 10 - 105 30 40 2,4-Dinitrotoluene <543 3280 1033 ug/Kg ☼ 31 10 - 100 24 40 2,6-Dinitrotoluene <543 3280 1141 ug/Kg ☼ 35 10 - 105 23 40 Fluorene <329 3280 1140 ug/Kg ☼ 35 10 - 105 15 40 Hexachlorobenzene <543 3280 1032 ug/Kg ☼ 31 10 - 105 14 40 Hexachlorobutadiene <543 3280 955.3 ug/Kg ☼ 29 10 - 95 17 40 Hexachlorocyclopentadiene <1090 3280 <1080 ug/Kg ☼ 18 10 - 95 37 40 Hexachloroethane <543 3280 929.0 ug/Kg ☼ 28 10 - 95 27 40 Di-n-octyl phthalate <543 3280 1315 ug/Kg ☼ 40 15 - 120 0 40 Fluoranthene <329 3280 1281 ug/Kg ☼ 38 15 - 110 9 40 Indeno[1,2,3-cd]pyrene <329 3280 1113 ug/Kg ☼ 34 10 - 105 9 40 Isophorone <543 3280 1169 ug/Kg ☼ 36 10 - 95 21 40 2-Methylnaphthalene <329 3280 1117 ug/Kg ☼ 34 10 - 95 18 40 Naphthalene <329 3280 1081 ug/Kg ☼ 33 10 - 95 19 40 2-Nitroaniline <543 3280 1272 ug/Kg ☼ 39 10 - 100 19 40 3-Nitroaniline <543 3280 1315 ug/Kg ☼ 40 10 - 95 5 40 4-Nitroaniline <543 3280 1215 ug/Kg ☼ 37 10 - 100 1 40 Nitrobenzene <543 3280 1103 ug/Kg ☼ 34 10 - 95 18 40 N-Nitrosodiphenylamine <543 6560 2173 ug/Kg ☼ 33 10 - 120 15 40 N-Nitrosodi-n-propylamine <543 3280 1209 ug/Kg ☼ 37 10 - 95 21 40 N-Nitrosodimethylamine <543 3280 1005 ug/Kg ☼ 31 10 - 90 18 40

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Page 103 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: 310-68161-1 MSD Client Sample ID: B-8E 0.5-5' Matrix: Soil Prep Type: Total/NA 4 Analysis Batch: 107672 Prep Batch: 107540 Sample Sample Spike MSD MSD %Rec. RPD 5 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Phenanthrene <543 3280 1311 ug/Kg ☼ 38 15 - 110 7 40 6 Pyrene <543 3280 1225 ug/Kg ☼ 37 15 - 110 7 40 Pyridine <543 3280 899.7 ug/Kg ☼ 27 10 - 70 26 40 7 1,2,4-Trichlorobenzene <543 3280 1048 ug/Kg ☼ 32 10 - 95 20 40 4-Chloro-3-methylphenol <543 F1 F2 3280 <542 F1 F2 ug/Kg ☼ 4 10 - 105 67 40 8 2-Chlorophenol <543 F1 3280 <542 F1 ug/Kg ☼ 0 10 - 95 NC 40 2,4-Dichlorophenol <543 F1 3280 <542 F1 ug/Kg ☼ 0 10 - 100 NC 40 9 2,4-Dimethylphenol <543 F1 3280 <542 F1 ug/Kg ☼ 9 10 - 100 30 40 2,4-Dinitrophenol <1090 F1 6560 <1080 F1 ug/Kg ☼ 0 10 - 80 NC 40 10 4,6-Dinitro-2-methylphenol <543 F1 6560 <542 F1 ug/Kg ☼ 0 10 - 100 NC 40 2-Methylphenol <543 F1 F2 3280 <542 F1 F2 ug/Kg ☼ 4 10 - 95 70 40 Methylphenol, 3 & 4 <543 F1 3280 <542 F1 ug/Kg ☼ 0 10 - 100 NC 40 11 2-Nitrophenol <543 F1 3280 <542 F1 ug/Kg ☼ 0 10 - 95 NC 40 4-Nitrophenol <543 F1 6560 <542 F1 ug/Kg ☼ 0 10 - 105 NC 40 12 Pentachlorophenol <543 F1 6560 <542 F1 ug/Kg ☼ 0 10 - 95 NC 40 Phenol <543 F1 F2 3280 <542 F1 F2 ug/Kg ☼ 0.9 10 - 95 64 40 13 2,4,5-Trichlorophenol <543 F1 3280 <542 F1 ug/Kg ☼ 0 10 - 105 NC 40 2,4,6-Trichlorophenol <543 F1 3280 <542 F1 ug/Kg ☼ 0 10 - 100 NC 40 14

MSD MSD Surrogate %Recovery Qualifier Limits 15 2-Fluorophenol (Surr) 0.06 X 15 - 90 Phenol-d6 (Surr) 0.9 X 20 - 90 Nitrobenzene-d5 (Surr) 35 15 - 90 2-Fluorobiphenyl (Surr) 34 20 - 90 2,4,6-Tribromophenol (Surr) 0.1 X 25 - 105 Terphenyl-d14 (Surr) 37 35 - 110

Method: 8081B - Organochlorine Pesticides (GC)

Lab Sample ID: MB 310-107526/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 107885 Prep Batch: 107526 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aldrin <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 alpha-BHC <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 beta-BHC <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 Chlordane (technical) <2.00 2.00 ug/L 11/05/15 11:30 11/09/15 11:12 1 4,4'-DDD <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 4,4'-DDE <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 4,4'-DDT <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 delta-BHC <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 Dieldrin <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 Endosulfan I <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 Endosulfan II <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 Endosulfan sulfate <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 Endrin <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 Endrin aldehyde <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1

TestAmerica Cedar Falls

Page 104 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) (Continued) 3 Lab Sample ID: MB 310-107526/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107885 Prep Batch: 107526 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac gamma-BHC (Lindane) <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 6 Heptachlor <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 Heptachlor epoxide <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 7 Methoxychlor <0.0320 0.0320 ug/L 11/05/15 11:30 11/09/15 11:12 1 Toxaphene <2.00 2.00 ug/L 11/05/15 11:30 11/09/15 11:12 1 8 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 9 DCB Decachlorobiphenyl (Surr) 44 30 - 125 11/05/15 11:30 11/09/15 11:12 1 Tetrachloro-m-xylene 40 15 - 115 11/05/15 11:30 11/09/15 11:12 1 10 Lab Sample ID: LCS 310-107526/2-A Client Sample ID: Lab Control Sample 11 Matrix: Water Prep Type: Total/NA Analysis Batch: 107885 Prep Batch: 107526 12 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits 13 Aldrin 0.500 0.3160 ug/L 63 30 - 115 alpha-BHC 0.500 0.2950 ug/L 59 30 - 115 beta-BHC 0.500 0.3308 ug/L 66 35 - 115 14 4,4'-DDE 0.500 0.3432 ug/L 69 35 - 120 4,4'-DDT 0.500 0.3994 ug/L 80 40 - 135 15 delta-BHC 0.500 0.3265 ug/L 65 40 - 115 Dieldrin 0.500 0.3597 ug/L 72 35 - 120 Endosulfan I 0.500 0.1265 ug/L 25 15 - 115 Endosulfan II 0.500 0.1694 ug/L 34 25 - 120 Endosulfan sulfate 0.500 0.4201 ug/L 84 40 - 135 Endrin 0.500 0.3960 ug/L 79 35 - 130 Endrin aldehyde 0.500 0.3841 ug/L 77 40 - 115 gamma-BHC (Lindane) 0.500 0.3100 ug/L 62 30 - 115 Heptachlor 0.500 0.3344 ug/L 67 35 - 115 Heptachlor epoxide 0.500 0.3396 ug/L 68 35 - 115 Methoxychlor 0.500 0.4214 ug/L 84 50 - 145

LCS LCS Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 45 30 - 125 Tetrachloro-m-xylene 35 15 - 115

Lab Sample ID: LCSD 310-107526/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 107885 Prep Batch: 107526 Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Aldrin 0.500 0.3550 ug/L 71 30 - 115 12 35 alpha-BHC 0.500 0.3269 ug/L 65 30 - 115 10 35 beta-BHC 0.500 0.3613 ug/L 72 35 - 115 9 35 4,4'-DDE 0.500 0.3724 ug/L 74 35 - 120 8 35 4,4'-DDT 0.500 0.4258 ug/L 85 40 - 135 6 35 delta-BHC 0.500 0.3523 ug/L 70 40 - 115 8 35 Dieldrin 0.500 0.3888 ug/L 78 35 - 120 8 35

TestAmerica Cedar Falls

Page 105 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) (Continued) 3 Lab Sample ID: LCSD 310-107526/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107885 Prep Batch: 107526 Spike LCSD LCSD %Rec. RPD 5 Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Endosulfan I 0.500 0.1369 ug/L 27 15 - 115 8 35 6 Endosulfan II 0.500 0.1772 ug/L 35 25 - 120 4 35 Endosulfan sulfate 0.500 0.4455 ug/L 89 40 - 135 6 35 7 Endrin 0.500 0.4292 ug/L 86 35 - 130 8 35 Endrin aldehyde 0.500 0.4003 ug/L 80 40 - 115 4 35 8 gamma-BHC (Lindane) 0.500 0.3442 ug/L 69 30 - 115 10 35 Heptachlor 0.500 0.3771 ug/L 75 35 - 115 12 35 9 Heptachlor epoxide 0.500 0.3741 ug/L 75 35 - 115 10 35 Methoxychlor 0.500 0.4488 ug/L 90 50 - 145 6 35 10 LCSD LCSD Surrogate %Recovery Qualifier Limits 11 DCB Decachlorobiphenyl (Surr) 48 30 - 125 Tetrachloro-m-xylene 38 15 - 115 12 Lab Sample ID: MB 500-311552/1-A Client Sample ID: Method Blank 13 Matrix: Solid Prep Type: Total/NA Analysis Batch: 311763 Prep Batch: 311552 MB MB 14 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aldrin <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 15 alpha-BHC <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 beta-BHC <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Chlordane (technical) <6.70 6.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 4,4'-DDD <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 4,4'-DDE <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 4,4'-DDT <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 delta-BHC <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Dieldrin <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Endosulfan I <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Endosulfan II <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Endosulfan sulfate <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Endrin <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Endrin aldehyde <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 gamma-BHC (Lindane) <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Heptachlor <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Heptachlor epoxide <1.70 1.70 ug/Kg 11/06/15 16:28 11/09/15 13:26 1 Toxaphene <16.7 16.7 ug/Kg 11/06/15 16:28 11/09/15 13:26 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 97 56 - 128 11/06/15 16:28 11/09/15 13:26 1 Tetrachloro-m-xylene 88 45 - 112 11/06/15 16:28 11/09/15 13:26 1

Lab Sample ID: LCS 500-311552/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 311763 Prep Batch: 311552 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Aldrin 13.3 11.85 ug/Kg 89 54 - 110

TestAmerica Cedar Falls

Page 106 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) (Continued) 3 Lab Sample ID: LCS 500-311552/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 311763 Prep Batch: 311552 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits alpha-BHC 13.3 11.89 ug/Kg 89 53 - 110 6 beta-BHC 13.3 11.94 ug/Kg 90 65 - 110 4,4'-DDD 13.3 11.70 ug/Kg 88 66 - 110 7 4,4'-DDE 13.3 11.68 ug/Kg 88 64 - 110 4,4'-DDT 13.3 11.48 ug/Kg 86 50 - 115 8 delta-BHC 13.3 12.19 ug/Kg 91 50 - 110 Dieldrin 13.3 11.49 ug/Kg 86 63 - 110 9 Endosulfan I 13.3 9.703 ug/Kg 73 51 - 110 Endosulfan II 13.3 10.48 ug/Kg 79 56 - 110 10 Endosulfan sulfate 13.3 11.37 ug/Kg 85 63 - 120 Endrin 13.3 12.11 ug/Kg 91 59 - 110 Endrin aldehyde 13.3 11.41 ug/Kg 86 56 - 110 11 gamma-BHC (Lindane) 13.3 11.76 ug/Kg 88 55 - 110 Heptachlor 13.3 11.38 ug/Kg 85 50 - 110 12 Heptachlor epoxide 13.3 11.65 ug/Kg 87 50 122 - 13 LCS LCS Surrogate %Recovery Qualifier Limits 14 DCB Decachlorobiphenyl 96 56 - 128 Tetrachloro-m-xylene 90 45 - 112 15 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography

Lab Sample ID: MB 310-107527/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 107881 Prep Batch: 107527 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.800 0.800 ug/L 11/05/15 11:31 11/09/15 10:57 1 PCB-1221 <0.800 0.800 ug/L 11/05/15 11:31 11/09/15 10:57 1 PCB-1232 <0.800 0.800 ug/L 11/05/15 11:31 11/09/15 10:57 1 PCB-1242 <0.800 0.800 ug/L 11/05/15 11:31 11/09/15 10:57 1 PCB-1248 <0.800 0.800 ug/L 11/05/15 11:31 11/09/15 10:57 1 PCB-1254 <0.800 0.800 ug/L 11/05/15 11:31 11/09/15 10:57 1 PCB-1260 <0.800 0.800 ug/L 11/05/15 11:31 11/09/15 10:57 1 PCB-1268 <0.800 0.800 ug/L 11/05/15 11:31 11/09/15 10:57 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 84 25 - 115 11/05/15 11:31 11/09/15 10:57 1 Tetrachloro-m-xylene 73 20 - 90 11/05/15 11:31 11/09/15 10:57 1

Lab Sample ID: LCS 310-107527/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 107881 Prep Batch: 107527 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits PCB-1016 5.00 3.775 ug/L 76 25 - 95 PCB-1260 5.00 3.490 ug/L 70 25 - 95

TestAmerica Cedar Falls

Page 107 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography (Continued) 3 Lab Sample ID: LCS 310-107527/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 107881 Prep Batch: 107527 5 LCS LCS Surrogate %Recovery Qualifier Limits 6 DCB Decachlorobiphenyl (Surr) 88 25 - 115 Tetrachloro-m-xylene 81 20 - 90 7 Lab Sample ID: LCSD 310-107527/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA 8 Analysis Batch: 107881 Prep Batch: 107527 Spike LCSD LCSD %Rec. RPD 9 Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit PCB-1016 5.00 3.814 ug/L 76 25 - 95 1 35 10 PCB-1260 5.00 3.526 ug/L 71 25 - 95 1 35

LCSD LCSD 11 Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 91 25 - 115 12 Tetrachloro-m-xylene 81 20 - 90 13 Lab Sample ID: MB 310-107542/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 14 Analysis Batch: 107879 Prep Batch: 107542 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 PCB-1016 <0.0500 0.0500 mg/Kg 11/05/15 11:56 11/09/15 11:45 1 PCB-1221 <0.0500 0.0500 mg/Kg 11/05/15 11:56 11/09/15 11:45 1 PCB-1232 <0.0500 0.0500 mg/Kg 11/05/15 11:56 11/09/15 11:45 1 PCB-1242 <0.0500 0.0500 mg/Kg 11/05/15 11:56 11/09/15 11:45 1 PCB-1248 <0.0500 0.0500 mg/Kg 11/05/15 11:56 11/09/15 11:45 1 PCB-1254 <0.0500 0.0500 mg/Kg 11/05/15 11:56 11/09/15 11:45 1 PCB-1260 <0.0500 0.0500 mg/Kg 11/05/15 11:56 11/09/15 11:45 1 PCB-1268 <0.0500 0.0500 mg/Kg 11/05/15 11:56 11/09/15 11:45 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 83 40 - 120 11/05/15 11:56 11/09/15 11:45 1 Tetrachloro-m-xylene 74 10 - 105 11/05/15 11:56 11/09/15 11:45 1

Lab Sample ID: LCS 310-107542/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107879 Prep Batch: 107542 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits PCB-1016 0.200 0.1466 mg/Kg 73 20 - 105 PCB-1260 0.200 0.1481 mg/Kg 74 20 - 105

LCS LCS Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 81 40 - 120 Tetrachloro-m-xylene 66 10 - 105

TestAmerica Cedar Falls

Page 108 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) 3 Lab Sample ID: MB 310-107516/1-A Client Sample ID: Method Blank 4 Matrix: Water Prep Type: Total/NA Analysis Batch: 107700 Prep Batch: 107516 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <300 300 ug/L 11/05/15 11:03 11/06/15 14:13 1 6 Gasoline <300 300 ug/L 11/05/15 11:03 11/06/15 14:13 1 Waste Oil <300 300 ug/L 11/05/15 11:03 11/06/15 14:13 1 7 Total Extractable Hydrocarbons <500 500 ug/L 11/05/15 11:03 11/06/15 14:13 1 8 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 9 n-Octacosane 120 45 - 140 11/05/15 11:03 11/06/15 14:13 1

Lab Sample ID: LCS 310-107516/2-A Client Sample ID: Lab Control Sample 10 Matrix: Water Prep Type: Total/NA Analysis Batch: 107700 Prep Batch: 107516 11 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits 12 Diesel 2000 2271 ug/L 114 30 - 125

LCS LCS 13 Surrogate %Recovery Qualifier Limits n-Octacosane 112 45 - 140 14 Lab Sample ID: LCSD 310-107516/3-A Client Sample ID: Lab Control Sample Dup 15 Matrix: Water Prep Type: Total/NA Analysis Batch: 107700 Prep Batch: 107516 Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Diesel 2000 2183 ug/L 109 30 - 125 4 35

LCSD LCSD Surrogate %Recovery Qualifier Limits n-Octacosane 138 45 - 140

Lab Sample ID: MB 310-107537/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 107664 Prep Batch: 107537 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <10.0 10.0 mg/Kg 11/05/15 11:49 11/06/15 11:15 1 Gasoline <10.0 10.0 mg/Kg 11/05/15 11:49 11/06/15 11:15 1 Waste Oil <10.0 10.0 mg/Kg 11/05/15 11:49 11/06/15 11:15 1 Total Extractable Hydrocarbons <15.0 15.0 mg/Kg 11/05/15 11:49 11/06/15 11:15 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 89 40 - 135 11/05/15 11:49 11/06/15 11:15 1

Lab Sample ID: LCS 310-107537/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107664 Prep Batch: 107537 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Diesel 133 107.1 mg/Kg 80 30 - 120

TestAmerica Cedar Falls

Page 109 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) (Continued) 3 Lab Sample ID: LCS 310-107537/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107664 Prep Batch: 107537 5 LCS LCS Surrogate %Recovery Qualifier Limits 6 n-Octacosane 88 40 - 135 7 Method: 6010C - Metals (ICP)

Lab Sample ID: MB 310-107397/1-A Client Sample ID: Method Blank 8 Matrix: Solid Prep Type: Total/NA Analysis Batch: 107637 Prep Batch: 107397 9 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 10 Antimony <4.05 4.05 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 Arsenic <3.24 3.24 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 11 Beryllium <0.405 0.405 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 Cadmium <0.809 0.809 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 12 Chromium <0.809 0.809 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 Copper <0.809 0.809 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 13 Lead <4.05 4.05 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 Nickel <2.02 2.02 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 14 Selenium <6.07 6.07 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 Silver <0.809 0.809 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 Zinc <0.809 0.809 mg/Kg 11/05/15 16:11 11/05/15 16:22 1 15

Lab Sample ID: LCS 310-107397/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107637 Prep Batch: 107397 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Antimony 196 196.0 mg/Kg 100 80 - 120 Arsenic 196 207.5 mg/Kg 106 80 - 120 Beryllium 97.8 95.72 mg/Kg 98 80 - 120 Cadmium 97.8 100.9 mg/Kg 103 80 - 120 Chromium 97.8 103.3 mg/Kg 106 80 - 120 Copper 196 199.3 mg/Kg 102 80 - 120 Lead 196 191.7 mg/Kg 98 80 - 120 Nickel 196 195.0 mg/Kg 100 80 - 120 Selenium 391 411.7 mg/Kg 105 80 - 120 Silver 97.8 96.17 mg/Kg 98 80 - 120 Zinc 196 192.4 mg/Kg 98 80 - 120

Lab Sample ID: 310-68161-4 DU Client Sample ID: B-9E 7.5-9' Matrix: Soil Prep Type: Total/NA Analysis Batch: 107637 Prep Batch: 107397 Sample Sample DU DU RPD Analyte Result Qualifier Result Qualifier Unit D RPD Limit Antimony <6.41 <6.25 mg/Kg ☼ NC 20 Arsenic 7.45 8.658 mg/Kg ☼ 15 20 Beryllium <0.641 <0.625 mg/Kg ☼ NC 20 Cadmium <1.28 <1.25 mg/Kg ☼ NC 20 Chromium 23.2 19.40 mg/Kg ☼ 18 20

TestAmerica Cedar Falls

Page 110 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 6010C - Metals (ICP) (Continued) 3 Lab Sample ID: 310-68161-4 DU Client Sample ID: B-9E 7.5-9' Matrix: Soil Prep Type: Total/NA 4 Analysis Batch: 107637 Prep Batch: 107397 Sample Sample DU DU RPD 5 Analyte Result Qualifier Result Qualifier Unit D RPD Limit Copper 26.5 27.62 mg/Kg ☼ 4 20 6 Lead 53.1 47.11 mg/Kg ☼ 12 20 Nickel 21.1 22.77 mg/Kg ☼ 8 20 7 Selenium <9.62 <9.37 mg/Kg ☼ NC 20 Silver <1.28 <1.25 mg/Kg ☼ NC 20 8 Zinc 136 160.7 mg/Kg ☼ 16 20 9 Method: 6020A - Metals (ICP/MS) 10 Lab Sample ID: MB 310-107412/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 11 Analysis Batch: 107834 Prep Batch: 107412 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 12 Antimony <1.00 1.00 ug/L 11/05/15 16:54 11/06/15 17:13 1 Arsenic <2.00 2.00 ug/L 11/05/15 16:54 11/06/15 17:13 1 13 Beryllium <1.00 1.00 ug/L 11/05/15 16:54 11/06/15 17:13 1 Cadmium <0.500 0.500 ug/L 11/05/15 16:54 11/06/15 17:13 1 14 Chromium <5.00 5.00 ug/L 11/05/15 16:54 11/06/15 17:13 1 Copper <2.00 2.00 ug/L 11/05/15 16:54 11/06/15 17:13 1 15 Lead <0.500 0.500 ug/L 11/05/15 16:54 11/06/15 17:13 1 Nickel <5.00 5.00 ug/L 11/05/15 16:54 11/06/15 17:13 1 Selenium <5.00 5.00 ug/L 11/05/15 16:54 11/06/15 17:13 1 Silver <1.00 1.00 ug/L 11/05/15 16:54 11/06/15 17:13 1 Thallium <1.00 1.00 ug/L 11/05/15 16:54 11/06/15 17:13 1 Zinc <10.0 10.0 ug/L 11/05/15 16:54 11/06/15 17:13 1

Lab Sample ID: LCS 310-107412/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 107834 Prep Batch: 107412 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Antimony 20.0 19.72 ug/L 99 80 - 120 Arsenic 40.0 38.67 ug/L 97 80 - 120 Beryllium 20.0 21.43 ug/L 107 80 - 120 Cadmium 20.0 20.12 ug/L 101 80 - 120 Chromium 40.0 38.22 ug/L 96 80 - 120 Copper 40.0 39.25 ug/L 98 80 - 120 Lead 20.0 20.24 ug/L 101 80 - 120 Nickel 40.0 39.69 ug/L 99 80 - 120 Selenium 40.0 37.06 ug/L 93 80 - 120 Silver 20.0 21.96 ug/L 110 80 - 120 Thallium 16.0 15.68 ug/L 98 80 - 120 Zinc 40.0 40.64 ug/L 102 80 - 120

TestAmerica Cedar Falls

Page 111 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 6020A - Metals (ICP/MS) (Continued) 3 Lab Sample ID: 310-68161-13 DU Client Sample ID: B-8E 4 Matrix: Ground Water Prep Type: Total/NA Analysis Batch: 108045 Prep Batch: 107412 Sample Sample DU DU RPD 5 Analyte Result Qualifier Result Qualifier Unit D RPD Limit Antimony <1.00 <1.00 ug/L NC 20 6 Arsenic 7.64 6.673 ug/L 13 20 Beryllium <1.00 <1.00 ug/L NC 20 7 Cadmium <0.500 <0.500 ug/L NC 20 Chromium 7.57 6.724 ug/L 12 20 8 Copper 3.87 3.399 ug/L 13 20 Lead 3.56 3.323 ug/L 7 20 9 Nickel 9.76 8.663 ug/L 12 20 Selenium <5.00 <5.00 ug/L NC 20 10 Silver <1.00 <1.00 ug/L NC 20 Thallium <1.00 <1.00 ug/L NC 20 11 Zinc 13.3 11.65 ug/L 13 20 12 Method: 7010 - Metals (GFAA) 13 Lab Sample ID: MB 310-107402/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 107893 Prep Batch: 107402 14 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Thallium <0.205 0.205 mg/Kg 11/05/15 16:24 11/06/15 17:41 1

Lab Sample ID: LCS 310-107402/2-A ^2 Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107893 Prep Batch: 107402 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Thallium 1.67 1.577 mg/Kg 94 80 - 120

Lab Sample ID: 310-68161-4 DU Client Sample ID: B-9E 7.5-9' Matrix: Soil Prep Type: Total/NA Analysis Batch: 107893 Prep Batch: 107402 Sample Sample DU DU RPD Analyte Result Qualifier Result Qualifier Unit D RPD Limit Thallium <1.10 <1.25 mg/Kg ☼ NC 20

Method: 7470A - Mercury (CVAA)

Lab Sample ID: MB 310-107701/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 107926 Prep Batch: 107701 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.000200 0.000200 mg/L 11/06/15 13:31 11/09/15 11:32 1

TestAmerica Cedar Falls

Page 112 of 139 11/12/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 7470A - Mercury (CVAA) (Continued) 3 Lab Sample ID: LCS 310-107701/2-A Client Sample ID: Lab Control Sample 4 Matrix: Water Prep Type: Total/NA Analysis Batch: 107926 Prep Batch: 107701 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Mercury 0.00167 0.001455 mg/L 87 80 - 120 6

Lab Sample ID: 310-68161-13 MS Client Sample ID: B-8E 7 Matrix: Ground Water Prep Type: Total/NA Analysis Batch: 107926 Prep Batch: 107701 8 Sample Sample Spike MS MS %Rec. Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 9 Mercury <0.000200 0.00167 0.001604 mg/L 96 80 - 120

Lab Sample ID: 310-68161-13 MSD Client Sample ID: B-8E 10 Matrix: Ground Water Prep Type: Total/NA Analysis Batch: 107926 Prep Batch: 107701 11 Sample Sample Spike MSD MSD %Rec. RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit 12 Mercury <0.000200 0.00167 0.001573 mg/L 94 80 - 120 2 20 13 Method: 7471B - Mercury (CVAA) 14 Lab Sample ID: MB 310-107396/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 15 Analysis Batch: 107722 Prep Batch: 107396 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.0196 0.0196 mg/Kg 11/04/15 15:55 11/06/15 11:39 1

Lab Sample ID: LCS 310-107396/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107722 Prep Batch: 107396 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Mercury 0.161 0.1480 mg/Kg 92 80 - 120

TestAmerica Cedar Falls

Page 113 of 139 11/12/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 GC/MS VOA 3 Analysis Batch: 107501 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water 8260C 5 310-68161-14 B-9E Total/NA Ground Water 8260C 310-68161-15 B-13E Total/NA Ground Water 8260C 6 310-68161-16 Trip Blank Total/NA Water 8260C LCS 310-107501/5 Lab Control Sample Total/NA Water 8260C LCS 310-107501/6 Lab Control Sample Total/NA Water 8260C 7 MB 310-107501/7 Method Blank Total/NA Water 8260C 8 Prep Batch: 107621

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 9 310-68161-2 B-8E 6-7.5' Total/NA Soil 5030B 310-68161-3 B-9E 2.5-3.5' Total/NA Soil 5030B 10 310-68161-6 B-11E 3-4' Total/NA Soil 5030B 310-68161-7 B-13E 10-13' Total/NA Soil 5030B 11 310-68161-8 B-14E 5-7' Total/NA Soil 5030B LCS 310-107621/2-A Lab Control Sample Total/NA Solid 5030B 12 MB 310-107621/1-A Method Blank Total/NA Solid 5030B

Analysis Batch: 107622 13 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 14 310-68161-2 B-8E 6-7.5' Total/NA Soil 8260C 107621 310-68161-3 B-9E 2.5-3.5' Total/NA Soil 8260C 107621 310-68161-6 B-11E 3-4' Total/NA Soil 8260C 107621 15 310-68161-7 B-13E 10-13' Total/NA Soil 8260C 107621 310-68161-8 B-14E 5-7' Total/NA Soil 8260C 107621 LCS 310-107621/2-A Lab Control Sample Total/NA Solid 8260C 107621 MB 310-107621/1-A Method Blank Total/NA Solid 8260C 107621

Prep Batch: 107780

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-9 B-17E 0-4' Total/NA Soil 5030B 310-68161-10 B-19E 0-4' Total/NA Soil 5030B LCS 310-107780/2-A Lab Control Sample Total/NA Solid 5030B MB 310-107780/1-A Method Blank Total/NA Solid 5030B

Analysis Batch: 107781

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-9 B-17E 0-4' Total/NA Soil 8260C 107780 310-68161-10 B-19E 0-4' Total/NA Soil 8260C 107780 LCS 310-107780/2-A Lab Control Sample Total/NA Solid 8260C 107780 MB 310-107780/1-A Method Blank Total/NA Solid 8260C 107780

Prep Batch: 107816

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-11 B-20E 0-4' Total/NA Soil 5030B 310-68161-11 MS B-20E 0-4' Total/NA Soil 5030B 310-68161-11 MSD B-20E 0-4' Total/NA Soil 5030B 310-68161-12 B-22E 1-2.5' Total/NA Soil 5030B LCS 310-107816/2-A Lab Control Sample Total/NA Solid 5030B MB 310-107816/1-A Method Blank Total/NA Solid 5030B

TestAmerica Cedar Falls

Page 114 of 139 11/12/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 GC/MS VOA (Continued) 3 Analysis Batch: 107817 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-11 B-20E 0-4' Total/NA Soil 8260C 107816 5 310-68161-11 MS B-20E 0-4' Total/NA Soil 8260C 107816 310-68161-11 MSD B-20E 0-4' Total/NA Soil 8260C 107816 6 310-68161-12 B-22E 1-2.5' Total/NA Soil 8260C 107816 LCS 310-107816/2-A Lab Control Sample Total/NA Solid 8260C 107816 MB 310-107816/1-A Method Blank Total/NA Solid 8260C 107816 7

GC/MS Semi VOA 8 Prep Batch: 107521 9 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water 3510C 10 310-68161-14 B-9E Total/NA Ground Water 3510C 310-68161-15 B-13E Total/NA Ground Water 3510C 11 LCS 310-107521/2-A Lab Control Sample Total/NA Water 3510C LCSD 310-107521/3-A Lab Control Sample Dup Total/NA Water 3510C 12 MB 310-107521/1-A Method Blank Total/NA Water 3510C 13 Prep Batch: 107540 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 14 310-68161-1 B-8E 0.5-5' Total/NA Soil 3546 310-68161-1 MS B-8E 0.5-5' Total/NA Soil 3546 15 310-68161-1 MSD B-8E 0.5-5' Total/NA Soil 3546 310-68161-4 B-9E 7.5-9' Total/NA Soil 3546 310-68161-5 B-11E 0-1.5' Total/NA Soil 3546 310-68161-7 B-13E 10-13' Total/NA Soil 3546 310-68161-8 B-14E 5-7' Total/NA Soil 3546 310-68161-9 B-17E 0-4' Total/NA Soil 3546 310-68161-10 B-19E 0-4' Total/NA Soil 3546 310-68161-11 B-20E 0-4' Total/NA Soil 3546 310-68161-12 B-22E 1-2.5' Total/NA Soil 3546 LCS 310-107540/2-A Lab Control Sample Total/NA Solid 3546 MB 310-107540/1-A Method Blank Total/NA Solid 3546

Analysis Batch: 107672

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 8270D 107540 310-68161-1 MS B-8E 0.5-5' Total/NA Soil 8270D 107540 310-68161-1 MSD B-8E 0.5-5' Total/NA Soil 8270D 107540 310-68161-4 B-9E 7.5-9' Total/NA Soil 8270D 107540 310-68161-5 B-11E 0-1.5' Total/NA Soil 8270D 107540 310-68161-7 B-13E 10-13' Total/NA Soil 8270D 107540 310-68161-8 B-14E 5-7' Total/NA Soil 8270D 107540 310-68161-9 B-17E 0-4' Total/NA Soil 8270D 107540 310-68161-10 B-19E 0-4' Total/NA Soil 8270D 107540 310-68161-11 B-20E 0-4' Total/NA Soil 8270D 107540 310-68161-12 B-22E 1-2.5' Total/NA Soil 8270D 107540 LCS 310-107540/2-A Lab Control Sample Total/NA Solid 8270D 107540 MB 310-107540/1-A Method Blank Total/NA Solid 8270D 107540

TestAmerica Cedar Falls

Page 115 of 139 11/12/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 GC/MS Semi VOA (Continued) 3 Analysis Batch: 107846 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water 8270D 107521 5 310-68161-14 B-9E Total/NA Ground Water 8270D 107521 310-68161-15 B-13E Total/NA Ground Water 8270D 107521 6 LCS 310-107521/2-A Lab Control Sample Total/NA Water 8270D 107521 LCSD 310-107521/3-A Lab Control Sample Dup Total/NA Water 8270D 107521 MB 310-107521/1-A Method Blank Total/NA Water 8270D 107521 7

GC Semi VOA 8 Prep Batch: 107516 9 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water 3510C 10 310-68161-14 B-9E Total/NA Ground Water 3510C 310-68161-15 B-13E Total/NA Ground Water 3510C 11 LCS 310-107516/2-A Lab Control Sample Total/NA Water 3510C LCSD 310-107516/3-A Lab Control Sample Dup Total/NA Water 3510C 12 MB 310-107516/1-A Method Blank Total/NA Water 3510C 13 Prep Batch: 107526 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 14 310-68161-13 B-8E Total/NA Ground Water 3510C 310-68161-14 B-9E Total/NA Ground Water 3510C 15 310-68161-15 B-13E Total/NA Ground Water 3510C LCS 310-107526/2-A Lab Control Sample Total/NA Water 3510C LCSD 310-107526/3-A Lab Control Sample Dup Total/NA Water 3510C MB 310-107526/1-A Method Blank Total/NA Water 3510C

Prep Batch: 107527

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water 3510C 310-68161-14 B-9E Total/NA Ground Water 3510C 310-68161-15 B-13E Total/NA Ground Water 3510C LCS 310-107527/2-A Lab Control Sample Total/NA Water 3510C LCSD 310-107527/3-A Lab Control Sample Dup Total/NA Water 3510C MB 310-107527/1-A Method Blank Total/NA Water 3510C

Prep Batch: 107537

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 3546 310-68161-4 B-9E 7.5-9' Total/NA Soil 3546 310-68161-5 B-11E 0-1.5' Total/NA Soil 3546 310-68161-7 B-13E 10-13' Total/NA Soil 3546 310-68161-8 B-14E 5-7' Total/NA Soil 3546 310-68161-9 B-17E 0-4' Total/NA Soil 3546 310-68161-10 B-19E 0-4' Total/NA Soil 3546 310-68161-11 B-20E 0-4' Total/NA Soil 3546 310-68161-12 B-22E 1-2.5' Total/NA Soil 3546 LCS 310-107537/2-A Lab Control Sample Total/NA Solid 3546 MB 310-107537/1-A Method Blank Total/NA Solid 3546

TestAmerica Cedar Falls

Page 116 of 139 11/12/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 GC Semi VOA (Continued) 3 Prep Batch: 107542 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 3546 5 310-68161-4 B-9E 7.5-9' Total/NA Soil 3546 310-68161-5 B-11E 0-1.5' Total/NA Soil 3546 6 310-68161-7 B-13E 10-13' Total/NA Soil 3546 310-68161-8 B-14E 5-7' Total/NA Soil 3546 310-68161-9 B-17E 0-4' Total/NA Soil 3546 7 310-68161-10 B-19E 0-4' Total/NA Soil 3546 310-68161-11 B-20E 0-4' Total/NA Soil 3546 8 310-68161-12 B-22E 1-2.5' Total/NA Soil 3546 LCS 310-107542/2-A Lab Control Sample Total/NA Solid 3546 9 MB 310-107542/1-A Method Blank Total/NA Solid 3546 10 Analysis Batch: 107664 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 11 310-68161-1 B-8E 0.5-5' Total/NA Soil OA-2 107537 310-68161-4 B-9E 7.5-9' Total/NA Soil OA-2 107537 12 310-68161-5 B-11E 0-1.5' Total/NA Soil OA-2 107537 310-68161-7 B-13E 10-13' Total/NA Soil OA-2 107537 13 310-68161-8 B-14E 5-7' Total/NA Soil OA-2 107537 310-68161-9 B-17E 0-4' Total/NA Soil OA-2 107537 14 310-68161-10 B-19E 0-4' Total/NA Soil OA-2 107537 310-68161-11 B-20E 0-4' Total/NA Soil OA-2 107537 310-68161-12 B-22E 1-2.5' Total/NA Soil OA-2 107537 15 LCS 310-107537/2-A Lab Control Sample Total/NA Solid OA-2 107537 MB 310-107537/1-A Method Blank Total/NA Solid OA-2 107537

Analysis Batch: 107700

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water OA-2 107516 310-68161-14 B-9E Total/NA Ground Water OA-2 107516 310-68161-15 B-13E Total/NA Ground Water OA-2 107516 LCS 310-107516/2-A Lab Control Sample Total/NA Water OA-2 107516 LCSD 310-107516/3-A Lab Control Sample Dup Total/NA Water OA-2 107516 MB 310-107516/1-A Method Blank Total/NA Water OA-2 107516

Analysis Batch: 107879

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 8082A 107542 310-68161-4 B-9E 7.5-9' Total/NA Soil 8082A 107542 310-68161-5 B-11E 0-1.5' Total/NA Soil 8082A 107542 310-68161-7 B-13E 10-13' Total/NA Soil 8082A 107542 310-68161-8 B-14E 5-7' Total/NA Soil 8082A 107542 310-68161-9 B-17E 0-4' Total/NA Soil 8082A 107542 310-68161-10 B-19E 0-4' Total/NA Soil 8082A 107542 310-68161-11 B-20E 0-4' Total/NA Soil 8082A 107542 310-68161-12 B-22E 1-2.5' Total/NA Soil 8082A 107542 LCS 310-107542/2-A Lab Control Sample Total/NA Solid 8082A 107542 MB 310-107542/1-A Method Blank Total/NA Solid 8082A 107542

TestAmerica Cedar Falls

Page 117 of 139 11/12/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 GC Semi VOA (Continued) 3 Analysis Batch: 107881 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water 8082A 107527 5 310-68161-14 B-9E Total/NA Ground Water 8082A 107527 310-68161-15 B-13E Total/NA Ground Water 8082A 107527 6 LCS 310-107527/2-A Lab Control Sample Total/NA Water 8082A 107527 LCSD 310-107527/3-A Lab Control Sample Dup Total/NA Water 8082A 107527 MB 310-107527/1-A Method Blank Total/NA Water 8082A 107527 7 Analysis Batch: 107885 8 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water 8081B 107526 9 310-68161-14 B-9E Total/NA Ground Water 8081B 107526 310-68161-15 B-13E Total/NA Ground Water 8081B 107526 10 LCS 310-107526/2-A Lab Control Sample Total/NA Water 8081B 107526 LCSD 310-107526/3-A Lab Control Sample Dup Total/NA Water 8081B 107526 11 MB 310-107526/1-A Method Blank Total/NA Water 8081B 107526

Prep Batch: 311552 12 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 13 310-68161-1 B-8E 0.5-5' Total/NA Soil 3541 310-68161-4 B-9E 7.5-9' Total/NA Soil 3541 14 310-68161-5 B-11E 0-1.5' Total/NA Soil 3541 310-68161-7 B-13E 10-13' Total/NA Soil 3541 310-68161-8 B-14E 5-7' Total/NA Soil 3541 15 310-68161-9 B-17E 0-4' Total/NA Soil 3541 310-68161-10 B-19E 0-4' Total/NA Soil 3541 310-68161-11 B-20E 0-4' Total/NA Soil 3541 310-68161-12 B-22E 1-2.5' Total/NA Soil 3541 LCS 500-311552/2-A Lab Control Sample Total/NA Solid 3541 MB 500-311552/1-A Method Blank Total/NA Solid 3541

Analysis Batch: 311763

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 8081B 311552 310-68161-9 B-17E 0-4' Total/NA Soil 8081B 311552 310-68161-10 B-19E 0-4' Total/NA Soil 8081B 311552 310-68161-11 B-20E 0-4' Total/NA Soil 8081B 311552 310-68161-12 B-22E 1-2.5' Total/NA Soil 8081B 311552 LCS 500-311552/2-A Lab Control Sample Total/NA Solid 8081B 311552 MB 500-311552/1-A Method Blank Total/NA Solid 8081B 311552

Analysis Batch: 311932

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-4 B-9E 7.5-9' Total/NA Soil 8081B 311552 310-68161-5 B-11E 0-1.5' Total/NA Soil 8081B 311552 310-68161-7 B-13E 10-13' Total/NA Soil 8081B 311552 310-68161-8 B-14E 5-7' Total/NA Soil 8081B 311552

TestAmerica Cedar Falls

Page 118 of 139 11/12/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Metals 3 Prep Batch: 107396 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 7471B 5 310-68161-4 B-9E 7.5-9' Total/NA Soil 7471B 310-68161-5 B-11E 0-1.5' Total/NA Soil 7471B 6 310-68161-7 B-13E 10-13' Total/NA Soil 7471B 310-68161-8 B-14E 5-7' Total/NA Soil 7471B 310-68161-9 B-17E 0-4' Total/NA Soil 7471B 7 310-68161-10 B-19E 0-4' Total/NA Soil 7471B 310-68161-11 B-20E 0-4' Total/NA Soil 7471B 8 310-68161-12 B-22E 1-2.5' Total/NA Soil 7471B LCS 310-107396/2-A Lab Control Sample Total/NA Solid 7471B 9 MB 310-107396/1-A Method Blank Total/NA Solid 7471B 10 Prep Batch: 107397 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 11 310-68161-1 B-8E 0.5-5' Total/NA Soil 3050B 310-68161-4 B-9E 7.5-9' Total/NA Soil 3050B 12 310-68161-4 DU B-9E 7.5-9' Total/NA Soil 3050B 310-68161-5 B-11E 0-1.5' Total/NA Soil 3050B 13 310-68161-7 B-13E 10-13' Total/NA Soil 3050B 310-68161-8 B-14E 5-7' Total/NA Soil 3050B 14 310-68161-9 B-17E 0-4' Total/NA Soil 3050B 310-68161-10 B-19E 0-4' Total/NA Soil 3050B 310-68161-11 B-20E 0-4' Total/NA Soil 3050B 15 310-68161-12 B-22E 1-2.5' Total/NA Soil 3050B LCS 310-107397/2-A Lab Control Sample Total/NA Solid 3050B MB 310-107397/1-A Method Blank Total/NA Solid 3050B

Prep Batch: 107402

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 3050B 310-68161-4 B-9E 7.5-9' Total/NA Soil 3050B 310-68161-4 DU B-9E 7.5-9' Total/NA Soil 3050B 310-68161-5 B-11E 0-1.5' Total/NA Soil 3050B 310-68161-7 B-13E 10-13' Total/NA Soil 3050B 310-68161-8 B-14E 5-7' Total/NA Soil 3050B 310-68161-9 B-17E 0-4' Total/NA Soil 3050B 310-68161-10 B-19E 0-4' Total/NA Soil 3050B 310-68161-11 B-20E 0-4' Total/NA Soil 3050B 310-68161-12 B-22E 1-2.5' Total/NA Soil 3050B LCS 310-107402/2-A ^2 Lab Control Sample Total/NA Solid 3050B MB 310-107402/1-A Method Blank Total/NA Solid 3050B

Prep Batch: 107412

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water 3010A 310-68161-13 DU B-8E Total/NA Ground Water 3010A 310-68161-14 B-9E Total/NA Ground Water 3010A 310-68161-15 B-13E Total/NA Ground Water 3010A LCS 310-107412/2-A Lab Control Sample Total/NA Water 3010A MB 310-107412/1-A Method Blank Total/NA Water 3010A

TestAmerica Cedar Falls

Page 119 of 139 11/12/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Metals (Continued) 3 Analysis Batch: 107637 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 6010C 107397 5 310-68161-4 B-9E 7.5-9' Total/NA Soil 6010C 107397 310-68161-4 DU B-9E 7.5-9' Total/NA Soil 6010C 107397 6 310-68161-5 B-11E 0-1.5' Total/NA Soil 6010C 107397 310-68161-7 B-13E 10-13' Total/NA Soil 6010C 107397 310-68161-8 B-14E 5-7' Total/NA Soil 6010C 107397 7 310-68161-9 B-17E 0-4' Total/NA Soil 6010C 107397 310-68161-10 B-19E 0-4' Total/NA Soil 6010C 107397 8 310-68161-11 B-20E 0-4' Total/NA Soil 6010C 107397 310-68161-12 B-22E 1-2.5' Total/NA Soil 6010C 107397 9 LCS 310-107397/2-A Lab Control Sample Total/NA Solid 6010C 107397 MB 310-107397/1-A Method Blank Total/NA Solid 6010C 107397 10 Prep Batch: 107701 11 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-13 B-8E Total/NA Ground Water 7470A 12 310-68161-13 MS B-8E Total/NA Ground Water 7470A 310-68161-13 MSD B-8E Total/NA Ground Water 7470A 13 310-68161-14 B-9E Total/NA Ground Water 7470A 310-68161-15 B-13E Total/NA Ground Water 7470A 14 LCS 310-107701/2-A Lab Control Sample Total/NA Water 7470A MB 310-107701/1-A Method Blank Total/NA Water 7470A 15 Analysis Batch: 107722

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 7471B 107396 310-68161-4 B-9E 7.5-9' Total/NA Soil 7471B 107396 310-68161-5 B-11E 0-1.5' Total/NA Soil 7471B 107396 310-68161-7 B-13E 10-13' Total/NA Soil 7471B 107396 310-68161-8 B-14E 5-7' Total/NA Soil 7471B 107396 310-68161-9 B-17E 0-4' Total/NA Soil 7471B 107396 310-68161-10 B-19E 0-4' Total/NA Soil 7471B 107396 310-68161-11 B-20E 0-4' Total/NA Soil 7471B 107396 310-68161-12 B-22E 1-2.5' Total/NA Soil 7471B 107396 LCS 310-107396/2-A Lab Control Sample Total/NA Solid 7471B 107396 MB 310-107396/1-A Method Blank Total/NA Solid 7471B 107396

Analysis Batch: 107834

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch LCS 310-107412/2-A Lab Control Sample Total/NA Water 6020A 107412 MB 310-107412/1-A Method Blank Total/NA Water 6020A 107412

Analysis Batch: 107893

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-1 B-8E 0.5-5' Total/NA Soil 7010 107402 310-68161-4 B-9E 7.5-9' Total/NA Soil 7010 107402 310-68161-4 DU B-9E 7.5-9' Total/NA Soil 7010 107402 310-68161-5 B-11E 0-1.5' Total/NA Soil 7010 107402 310-68161-7 B-13E 10-13' Total/NA Soil 7010 107402 310-68161-8 B-14E 5-7' Total/NA Soil 7010 107402 310-68161-9 B-17E 0-4' Total/NA Soil 7010 107402

TestAmerica Cedar Falls

Page 120 of 139 11/12/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Metals (Continued) 3 Analysis Batch: 107893 (Continued) 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-10 B-19E 0-4' Total/NA Soil 7010 107402 5 310-68161-11 B-20E 0-4' Total/NA Soil 7010 107402 310-68161-12 B-22E 1-2.5' Total/NA Soil 7010 107402 6 LCS 310-107402/2-A ^2 Lab Control Sample Total/NA Solid 7010 107402 MB 310-107402/1-A Method Blank Total/NA Solid 7010 107402 7 Analysis Batch: 107926

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 8 310-68161-13 B-8E Total/NA Ground Water 7470A 107701 310-68161-13 MS B-8E Total/NA Ground Water 7470A 107701 9 310-68161-13 MSD B-8E Total/NA Ground Water 7470A 107701 310-68161-14 B-9E Total/NA Ground Water 7470A 107701 10 310-68161-15 B-13E Total/NA Ground Water 7470A 107701 LCS 310-107701/2-A Lab Control Sample Total/NA Water 7470A 107701 11 MB 310-107701/1-A Method Blank Total/NA Water 7470A 107701

Analysis Batch: 108045 12 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 13 310-68161-13 B-8E Total/NA Ground Water 6020A 107412 310-68161-13 DU B-8E Total/NA Ground Water 6020A 107412 14 310-68161-14 B-9E Total/NA Ground Water 6020A 107412 310-68161-15 B-13E Total/NA Ground Water 6020A 107412 15 Analysis Batch: 108427

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-15 B-13E Total/NA Ground Water 6020A 107412

TestAmerica Cedar Falls

Page 121 of 139 11/12/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2

Client Sample ID: B-8E 0.5-5' Lab Sample ID: 310-68161-1 3 Date Collected: 11/02/15 11:25 Matrix: Soil Date Received: 11/04/15 09:35 4 Batch Batch Dilution Batch Prepared 5 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 107537 11/05/15 11:49 EEE TAL CF Total/NA Analysis OA-2 1 107664 11/06/15 11:43 LLS TAL CF 6 7 Client Sample ID: B-8E 0.5-5' Lab Sample ID: 310-68161-1 Date Collected: 11/02/15 11:25 Matrix: Soil 8 Date Received: 11/04/15 09:35 Percent Solids: 59.4

Batch Batch Dilution Batch Prepared 9 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 107540 11/05/15 11:51 EEE TAL CF 10 Total/NA Analysis 8270D 1 107672 11/06/15 15:52 DMD TAL CF Total/NA Prep 3541 311552 11/06/15 16:28 DEA TAL CHI 11 Total/NA Analysis 8081B 1 311763 11/09/15 14:07 PJG TAL CHI Total/NA Prep 3546 107542 11/05/15 11:56 EEE TAL CF 12 Total/NA Analysis 8082A 1 107879 11/09/15 12:40 BKT TAL CF 13 Total/NA Prep 3050B 107397 11/05/15 16:11 JNR TAL CF Total/NA Analysis 6010C 5 107637 11/05/15 18:51 OAD TAL CF 14 Total/NA Prep 3050B 107402 11/05/15 16:24 JNR TAL CF Total/NA Analysis 7010 4 107893 11/06/15 18:04 CJT TAL CF 15 Total/NA Prep 7471B 107396 11/04/15 15:55 SAD TAL CF Total/NA Analysis 7471B 1 107722 11/06/15 12:03 SAD TAL CF

Client Sample ID: B-8E 6-7.5' Lab Sample ID: 310-68161-2 Date Collected: 11/02/15 11:30 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 75.3

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107621 11/06/15 07:11 TCH TAL CF Total/NA Analysis 8260C 1 107622 11/06/15 17:14 TCH TAL CF

Client Sample ID: B-9E 2.5-3.5' Lab Sample ID: 310-68161-3 Date Collected: 11/02/15 12:25 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 44.6

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107621 11/06/15 07:11 TCH TAL CF Total/NA Analysis 8260C 1 107622 11/06/15 17:39 TCH TAL CF

Client Sample ID: B-9E 7.5-9' Lab Sample ID: 310-68161-4 Date Collected: 11/02/15 12:30 Matrix: Soil Date Received: 11/04/15 09:35

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 107537 11/05/15 11:49 EEE TAL CF

TestAmerica Cedar Falls

Page 122 of 139 11/12/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-9E 7.5-9' Lab Sample ID: 310-68161-4 3 Date Collected: 11/02/15 12:30 Matrix: Soil Date Received: 11/04/15 09:35 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Analysis OA-2 1 107664 11/06/15 11:57 LLS TAL CF 6 Client Sample ID: B-9E 7.5-9' Lab Sample ID: 310-68161-4 7 Date Collected: 11/02/15 12:30 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 76.3 8 Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 9 Total/NA Prep 3546 107540 11/05/15 11:51 EEE TAL CF Total/NA Analysis 8270D 1 107672 11/06/15 17:06 DMD TAL CF 10 Total/NA Prep 3541 311552 11/06/15 16:28 DEA TAL CHI Total/NA Analysis 8081B 5 311932 11/10/15 13:31 PJG TAL CHI 11 Total/NA Prep 3546 107542 11/05/15 11:56 EEE TAL CF Total/NA Analysis 8082A 1 107879 11/09/15 12:51 BKT TAL CF 12 Total/NA Prep 3050B 107397 11/05/15 16:11 JNR TAL CF Total/NA Analysis 6010C 1 107637 11/05/15 17:00 OAD TAL CF 13 Total/NA Prep 3050B 107402 11/05/15 16:24 JNR TAL CF Total/NA Analysis 7010 4 107893 11/06/15 18:08 CJT TAL CF 14 Total/NA Prep 7471B 107396 11/04/15 15:55 SAD TAL CF 15 Total/NA Analysis 7471B 1 107722 11/06/15 12:04 SAD TAL CF

Client Sample ID: B-11E 0-1.5' Lab Sample ID: 310-68161-5 Date Collected: 11/02/15 13:20 Matrix: Soil Date Received: 11/04/15 09:35

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 107537 11/05/15 11:49 EEE TAL CF Total/NA Analysis OA-2 1 107664 11/06/15 12:11 LLS TAL CF

Client Sample ID: B-11E 0-1.5' Lab Sample ID: 310-68161-5 Date Collected: 11/02/15 13:20 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 83.1

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 107540 11/05/15 11:51 EEE TAL CF Total/NA Analysis 8270D 10 107672 11/06/15 17:30 DMD TAL CF Total/NA Prep 3541 311552 11/06/15 16:28 DEA TAL CHI Total/NA Analysis 8081B 20 311932 11/10/15 13:51 PJG TAL CHI Total/NA Prep 3546 107542 11/05/15 11:56 EEE TAL CF Total/NA Analysis 8082A 1 107879 11/09/15 13:02 BKT TAL CF Total/NA Prep 3050B 107397 11/05/15 16:11 JNR TAL CF Total/NA Analysis 6010C 2 107637 11/05/15 18:53 OAD TAL CF Total/NA Prep 3050B 107402 11/05/15 16:24 JNR TAL CF Total/NA Analysis 7010 4 107893 11/06/15 18:23 CJT TAL CF

TestAmerica Cedar Falls

Page 123 of 139 11/12/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-11E 0-1.5' Lab Sample ID: 310-68161-5 3 Date Collected: 11/02/15 13:20 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 83.1 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Prep 7471B 107396 11/04/15 15:55 SAD TAL CF Total/NA Analysis 7471B 1 107722 11/06/15 12:06 SAD TAL CF 6 7 Client Sample ID: B-11E 3-4' Lab Sample ID: 310-68161-6 Date Collected: 11/02/15 13:25 Matrix: Soil 8 Date Received: 11/04/15 09:35 Percent Solids: 82.7

Batch Batch Dilution Batch Prepared 9 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107621 11/06/15 07:11 TCH TAL CF 10 Total/NA Analysis 8260C 1 107622 11/06/15 18:03 TCH TAL CF 11 Client Sample ID: B-13E 10-13' Lab Sample ID: 310-68161-7 Date Collected: 11/02/15 16:00 Matrix: Soil 12 Date Received: 11/04/15 09:35 13 Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 14 Total/NA Prep 3546 107537 11/05/15 11:49 EEE TAL CF Total/NA Analysis OA-2 1 107664 11/06/15 14:19 LLS TAL CF 15 Client Sample ID: B-13E 10-13' Lab Sample ID: 310-68161-7 Date Collected: 11/02/15 16:00 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 73.0

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107621 11/06/15 07:11 TCH TAL CF Total/NA Analysis 8260C 1 107622 11/06/15 18:28 TCH TAL CF Total/NA Prep 3546 107540 11/05/15 11:51 EEE TAL CF Total/NA Analysis 8270D 10 107672 11/06/15 17:54 DMD TAL CF Total/NA Prep 3541 311552 11/06/15 16:28 DEA TAL CHI Total/NA Analysis 8081B 10 311932 11/10/15 14:12 PJG TAL CHI Total/NA Prep 3546 107542 11/05/15 11:56 EEE TAL CF Total/NA Analysis 8082A 1 107879 11/09/15 13:13 BKT TAL CF Total/NA Prep 3050B 107397 11/05/15 16:11 JNR TAL CF Total/NA Analysis 6010C 1 107637 11/05/15 17:06 OAD TAL CF Total/NA Prep 3050B 107402 11/05/15 16:24 JNR TAL CF Total/NA Analysis 7010 4 107893 11/06/15 18:27 CJT TAL CF Total/NA Prep 7471B 107396 11/04/15 15:55 SAD TAL CF Total/NA Analysis 7471B 1 107722 11/06/15 12:07 SAD TAL CF

TestAmerica Cedar Falls

Page 124 of 139 11/12/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-14E 5-7' Lab Sample ID: 310-68161-8 3 Date Collected: 11/03/15 08:10 Matrix: Soil Date Received: 11/04/15 09:35 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Prep 3546 107537 11/05/15 11:49 EEE TAL CF Total/NA Analysis OA-2 1 107664 11/06/15 12:25 LLS TAL CF 6 7 Client Sample ID: B-14E 5-7' Lab Sample ID: 310-68161-8 Date Collected: 11/03/15 08:10 Matrix: Soil 8 Date Received: 11/04/15 09:35 Percent Solids: 80.5

Batch Batch Dilution Batch Prepared 9 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107621 11/06/15 07:11 TCH TAL CF 10 Total/NA Analysis 8260C 1 107622 11/06/15 18:53 TCH TAL CF Total/NA Prep 3546 107540 11/05/15 11:51 EEE TAL CF 11 Total/NA Analysis 8270D 1 107672 11/06/15 18:19 DMD TAL CF Total/NA Prep 3541 311552 11/06/15 16:28 DEA TAL CHI 12 Total/NA Analysis 8081B 1 311932 11/10/15 14:32 PJG TAL CHI Total/NA Prep 3546 107542 11/05/15 11:56 EEE TAL CF 13 Total/NA Analysis 8082A 1 107879 11/09/15 13:25 BKT TAL CF Total/NA Prep 3050B 107397 11/05/15 16:11 JNR TAL CF 14 Total/NA Analysis 6010C 1 107637 11/05/15 17:09 OAD TAL CF 15 Total/NA Prep 3050B 107402 11/05/15 16:24 JNR TAL CF Total/NA Analysis 7010 4 107893 11/06/15 18:31 CJT TAL CF Total/NA Prep 7471B 107396 11/04/15 15:55 SAD TAL CF Total/NA Analysis 7471B 1 107722 11/06/15 12:09 SAD TAL CF

Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 Date Collected: 11/02/15 15:00 Matrix: Soil Date Received: 11/04/15 09:35

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 107537 11/05/15 11:49 EEE TAL CF Total/NA Analysis OA-2 1 107664 11/06/15 14:04 LLS TAL CF

Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 Date Collected: 11/02/15 15:00 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 80.8

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107780 11/07/15 08:52 TCH TAL CF Total/NA Analysis 8260C 1 107781 11/08/15 16:56 TCH TAL CF Total/NA Prep 3546 107540 11/05/15 11:51 EEE TAL CF Total/NA Analysis 8270D 10 107672 11/06/15 18:43 DMD TAL CF Total/NA Prep 3541 311552 11/06/15 16:28 DEA TAL CHI Total/NA Analysis 8081B 10 311763 11/09/15 16:10 PJG TAL CHI Total/NA Prep 3546 107542 11/05/15 11:56 EEE TAL CF

TestAmerica Cedar Falls

Page 125 of 139 11/12/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 3 Date Collected: 11/02/15 15:00 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 80.8 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Analysis 8082A 1 107879 11/09/15 13:35 BKT TAL CF Total/NA Prep 3050B 107397 11/05/15 16:11 JNR TAL CF 6 Total/NA Analysis 6010C 1 107637 11/05/15 17:11 OAD TAL CF 7 Total/NA Prep 3050B 107402 11/05/15 16:24 JNR TAL CF Total/NA Analysis 7010 4 107893 11/06/15 18:34 CJT TAL CF 8 Total/NA Prep 7471B 107396 11/04/15 15:55 SAD TAL CF Total/NA Analysis 7471B 1 107722 11/06/15 12:13 SAD TAL CF 9

Client Sample ID: B-19E 0-4' Lab Sample ID: 310-68161-10 10 Date Collected: 11/03/15 09:15 Matrix: Soil Date Received: 11/04/15 09:35 11

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 12 Total/NA Prep 3546 107537 11/05/15 11:49 EEE TAL CF Total/NA Analysis OA-2 1 107664 11/06/15 14:47 LLS TAL CF 13 14 Client Sample ID: B-19E 0-4' Lab Sample ID: 310-68161-10 Date Collected: 11/03/15 09:15 Matrix: Soil 15 Date Received: 11/04/15 09:35 Percent Solids: 80.5

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107780 11/07/15 08:52 TCH TAL CF Total/NA Analysis 8260C 1 107781 11/08/15 17:21 TCH TAL CF Total/NA Prep 3546 107540 11/05/15 11:51 EEE TAL CF Total/NA Analysis 8270D 10 107672 11/06/15 19:08 DMD TAL CF Total/NA Prep 3541 311552 11/06/15 16:28 DEA TAL CHI Total/NA Analysis 8081B 10 311763 11/09/15 16:31 PJG TAL CHI Total/NA Prep 3546 107542 11/05/15 11:56 EEE TAL CF Total/NA Analysis 8082A 1 107879 11/09/15 13:46 BKT TAL CF Total/NA Prep 3050B 107397 11/05/15 16:11 JNR TAL CF Total/NA Analysis 6010C 1 107637 11/05/15 17:13 OAD TAL CF Total/NA Prep 3050B 107402 11/05/15 16:24 JNR TAL CF Total/NA Analysis 7010 4 107893 11/06/15 18:38 CJT TAL CF Total/NA Prep 7471B 107396 11/04/15 15:55 SAD TAL CF Total/NA Analysis 7471B 1 107722 11/06/15 12:15 SAD TAL CF

Client Sample ID: B-20E 0-4' Lab Sample ID: 310-68161-11 Date Collected: 11/02/15 15:20 Matrix: Soil Date Received: 11/04/15 09:35

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 107537 11/05/15 11:49 EEE TAL CF Total/NA Analysis OA-2 1 107664 11/06/15 12:39 LLS TAL CF

TestAmerica Cedar Falls

Page 126 of 139 11/12/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-20E 0-4' Lab Sample ID: 310-68161-11 3 Date Collected: 11/02/15 15:20 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 85.2 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Prep 5030B 107816 11/08/15 10:37 TCH TAL CF Total/NA Analysis 8260C 1 107817 11/08/15 23:32 TCH TAL CF 6 Total/NA Prep 3546 107540 11/05/15 11:51 EEE TAL CF Total/NA Analysis 8270D 1 107672 11/06/15 19:32 DMD TAL CF 7 Total/NA Prep 3541 311552 11/06/15 16:28 DEA TAL CHI Total/NA Analysis 8081B 1 311763 11/09/15 16:51 PJG TAL CHI 8 Total/NA Prep 3546 107542 11/05/15 11:56 EEE TAL CF 9 Total/NA Analysis 8082A 1 107879 11/09/15 13:57 BKT TAL CF Total/NA Prep 3050B 107397 11/05/15 16:11 JNR TAL CF 10 Total/NA Analysis 6010C 1 107637 11/05/15 17:15 OAD TAL CF Total/NA Prep 3050B 107402 11/05/15 16:24 JNR TAL CF 11 Total/NA Analysis 7010 4 107893 11/06/15 18:42 CJT TAL CF Total/NA Prep 7471B 107396 11/04/15 15:55 SAD TAL CF 12 Total/NA Analysis 7471B 1 107722 11/06/15 12:17 SAD TAL CF 13 Client Sample ID: B-22E 1-2.5' Lab Sample ID: 310-68161-12 Date Collected: 11/02/15 13:55 Matrix: Soil 14 Date Received: 11/04/15 09:35 15 Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 107537 11/05/15 11:49 EEE TAL CF Total/NA Analysis OA-2 1 107664 11/06/15 14:33 LLS TAL CF

Client Sample ID: B-22E 1-2.5' Lab Sample ID: 310-68161-12 Date Collected: 11/02/15 13:55 Matrix: Soil Date Received: 11/04/15 09:35 Percent Solids: 87.3

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107816 11/08/15 10:37 TCH TAL CF Total/NA Analysis 8260C 1 107817 11/08/15 23:57 TCH TAL CF Total/NA Prep 3546 107540 11/05/15 11:51 EEE TAL CF Total/NA Analysis 8270D 50 107672 11/06/15 19:56 DMD TAL CF Total/NA Prep 3541 311552 11/06/15 16:28 DEA TAL CHI Total/NA Analysis 8081B 20 311763 11/09/15 17:32 PJG TAL CHI Total/NA Prep 3546 107542 11/05/15 11:56 EEE TAL CF Total/NA Analysis 8082A 1 107879 11/09/15 14:07 BKT TAL CF Total/NA Prep 3050B 107397 11/05/15 16:11 JNR TAL CF Total/NA Analysis 6010C 5 107637 11/05/15 18:55 OAD TAL CF Total/NA Prep 3050B 107402 11/05/15 16:24 JNR TAL CF Total/NA Analysis 7010 4 107893 11/06/15 18:46 CJT TAL CF Total/NA Prep 7471B 107396 11/04/15 15:55 SAD TAL CF Total/NA Analysis 7471B 1 107722 11/06/15 12:18 SAD TAL CF

TestAmerica Cedar Falls

Page 127 of 139 11/12/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-8E Lab Sample ID: 310-68161-13 3 Date Collected: 11/03/15 11:40 Matrix: Ground Water Date Received: 11/04/15 09:35 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Analysis 8260C 1 107501 11/06/15 18:20 SJN TAL CF Total/NA Prep 3510C 107521 11/05/15 11:12 EEE TAL CF 6 Total/NA Analysis 8270D 1 107846 11/09/15 19:23 DMD TAL CF 7 Total/NA Prep 3510C 107526 11/05/15 11:30 EEE TAL CF Total/NA Analysis 8081B 1 107885 11/09/15 11:59 BKT TAL CF 8 Total/NA Prep 3510C 107527 11/05/15 11:31 EEE TAL CF Total/NA Analysis 8082A 1 107881 11/09/15 11:30 DLK TAL CF 9 Total/NA Prep 3510C 107516 11/05/15 11:03 EEE TAL CF Total/NA Analysis OA-2 1 107700 11/06/15 15:10 LLS TAL CF 10 Total/NA Prep 3010A 107412 11/05/15 16:54 JNR TAL CF Total/NA Analysis 6020A 1 108045 11/09/15 18:57 OAD TAL CF 11 Total/NA Prep 7470A 107701 11/06/15 13:31 SAD TAL CF Total/NA Analysis 7470A 1 107926 11/09/15 11:38 SAD TAL CF 12

Client Sample ID: B-9E Lab Sample ID: 310-68161-14 13 Date Collected: 11/03/15 14:10 Matrix: Ground Water Date Received: 11/04/15 09:35 14 Batch Batch Dilution Batch Prepared 15 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Analysis 8260C 1 107501 11/06/15 18:42 SJN TAL CF Total/NA Prep 3510C 107521 11/05/15 11:12 EEE TAL CF Total/NA Analysis 8270D 1 107846 11/09/15 19:47 DMD TAL CF Total/NA Prep 3510C 107526 11/05/15 11:30 EEE TAL CF Total/NA Analysis 8081B 1 107885 11/09/15 12:12 BKT TAL CF Total/NA Prep 3510C 107527 11/05/15 11:31 EEE TAL CF Total/NA Analysis 8082A 1 107881 11/09/15 11:41 DLK TAL CF Total/NA Prep 3510C 107516 11/05/15 11:03 EEE TAL CF Total/NA Analysis OA-2 1 107700 11/06/15 15:24 LLS TAL CF Total/NA Prep 3010A 107412 11/05/15 16:54 JNR TAL CF Total/NA Analysis 6020A 1 108045 11/09/15 19:04 OAD TAL CF Total/NA Prep 7470A 107701 11/06/15 13:31 SAD TAL CF Total/NA Analysis 7470A 1 107926 11/09/15 11:43 SAD TAL CF

Client Sample ID: B-13E Lab Sample ID: 310-68161-15 Date Collected: 11/03/15 15:30 Matrix: Ground Water Date Received: 11/04/15 09:35

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Analysis 8260C 10 107501 11/06/15 19:04 SJN TAL CF Total/NA Prep 3510C 107521 11/05/15 11:12 EEE TAL CF Total/NA Analysis 8270D 1 107846 11/09/15 20:11 DMD TAL CF Total/NA Prep 3510C 107526 11/05/15 11:30 EEE TAL CF Total/NA Analysis 8081B 1 107885 11/09/15 12:25 BKT TAL CF

TestAmerica Cedar Falls

Page 128 of 139 11/12/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-13E Lab Sample ID: 310-68161-15 3 Date Collected: 11/03/15 15:30 Matrix: Ground Water Date Received: 11/04/15 09:35 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Prep 3510C 107527 11/05/15 11:31 EEE TAL CF Total/NA Analysis 8082A 1 107881 11/09/15 11:52 DLK TAL CF 6 Total/NA Prep 3510C 107516 11/05/15 11:03 EEE TAL CF Total/NA Analysis OA-2 1 107700 11/06/15 15:39 LLS TAL CF 7 Total/NA Prep 3010A 107412 11/05/15 16:54 JNR TAL CF Total/NA Analysis 6020A 1 108045 11/09/15 19:07 OAD TAL CF 8 Total/NA Prep 3010A 107412 11/05/15 16:54 JNR TAL CF 9 Total/NA Analysis 6020A 2 108427 11/11/15 18:48 OAD TAL CF Total/NA Prep 7470A 107701 11/06/15 13:31 SAD TAL CF 10 Total/NA Analysis 7470A 1 107926 11/09/15 11:44 SAD TAL CF 11 Client Sample ID: Trip Blank Lab Sample ID: 310-68161-16 Date Collected: 11/02/15 00:00 Matrix: Water 12 Date Received: 11/04/15 09:35 13 Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Analysis 8260C 1 107501 11/06/15 19:25 SJN TAL CF 14

Laboratory References: 15 TAL CF = TestAmerica Cedar Falls, 704 Enterprise Drive, Cedar Falls, IA 50613, TEL (319)277-2401 TAL CHI = TestAmerica Chicago, 2417 Bond Street, University Park, IL 60484, TEL (708)534-5200

TestAmerica Cedar Falls

Page 129 of 139 11/12/2015 Certification Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Laboratory: TestAmerica Cedar Falls All certifications held by this laboratory are listed. Not all certifications are applicable to this report. 3

Authority Program EPA Region Certification ID Expiration Date 4 AIHA-LAP, LLC IHLAP 101044 11-01-16 Georgia State Program 4 N/A 09-29-16 5 Illinois NELAP 5 200024 11-29-15 Iowa State Program 7 007 12-01-15 6 Kansas NELAP 7 E-10341 01-31-15 * Minnesota NELAP 5 019-999-319 12-31-15 7 Minnesota (Petrofund) State Program 1 3349 08-22-16 North Dakota State Program 8 R-186 09-29-16 8 Oregon NELAP 10 IA100001 09-29-16 Wisconsin State Program 5 999917270 08-31-16 9 Laboratory: TestAmerica Chicago All certifications held by this laboratory are listed. Not all certifications are applicable to this report. 10 Authority Program EPA Region Certification ID Expiration Date 11 Alabama State Program 4 40461 04-30-16 California State Program 9 2903 04-30-16 12 Georgia State Program 4 N/A 04-30-16 Georgia State Program 4 939 04-30-16 Hawaii State Program 9 N/A 04-30-16 13 Illinois NELAP 5 100201 04-30-16 Indiana State Program 5 C-IL-02 04-30-16 14 Iowa State Program 7 82 05-01-16 Kansas NELAP 7 E-10161 01-31-16 * 15 Kentucky (UST) State Program 4 66 04-30-16 Kentucky (WW) State Program 4 KY90023 12-31-15 * Massachusetts State Program 1 M-IL035 06-30-16 Mississippi State Program 4 N/A 04-30-16 New York NELAP 2 IL00035 04-01-16 North Carolina (WW/SW) State Program 4 291 12-31-15 * North Dakota State Program 8 R-194 04-30-16 Oklahoma State Program 6 8908 08-31-16 South Carolina State Program 4 77001 04-30-16 USDA Federal P330-15-00038 02-11-18 Wisconsin State Program 5 999580010 08-31-16 Wyoming State Program 8 8TMS-Q 04-30-16

* Certification renewal pending - certification considered valid. TestAmerica Cedar Falls

Page 130 of 139 11/12/2015 Method Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 3 Method Method Description Protocol Laboratory 8260C Volatile Organic Compounds by GC/MS SW846 TAL CF 8270D Semivolatile Organic Compounds (GC/MS) SW846 TAL CF 4 8081B Organochlorine Pesticides (GC) SW846 TAL CHI 8081B Organochlorine Pesticides (GC) SW846 TAL CF 5 8082A Polychlorinated Biphenyls (PCBs) by Gas Chromatography SW846 TAL CF OA-2 Iowa - Extractable Petroleum Hydrocarbons (GC) Iowa DNR TAL CF 6 6010C Metals (ICP) SW846 TAL CF 6020A Metals (ICP/MS) SW846 TAL CF 7 7010 Metals (GFAA) SW846 TAL CF 7470A Mercury (CVAA) SW846 TAL CF 8 7471B Mercury (CVAA) SW846 TAL CF 9 Protocol References: Iowa DNR = Iowa Department of Natural Resources 10 SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates. 11 Laboratory References: TAL CF = TestAmerica Cedar Falls, 704 Enterprise Drive, Cedar Falls, IA 50613, TEL (319)277-2401 12 TAL CHI = TestAmerica Chicago, 2417 Bond Street, University Park, IL 60484, TEL (708)534-5200 13 14 15

TestAmerica Cedar Falls

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Page 137 of 139 11/12/2015 1 Login Sample Receipt Checklist 2

Client: Thiele Geotech Inc. Job Number: 310-68161-1 3 SDG Number: 15428.01 4 Login Number: 68161 List Source: TestAmerica Cedar Falls List Number: 1 Creator: Muehling, Angela C 5 Question Answer Comment 6 Radioactivity wasn't checked or is

TestAmerica Cedar Falls Page 138 of 139 11/12/2015 1 Login Sample Receipt Checklist 2

Client: Thiele Geotech Inc. Job Number: 310-68161-1 3 SDG Number: 15428.01 4 Login Number: 68161 List Source: TestAmerica Chicago List Number: 2 List Creation: 11/05/15 11:54 AM Creator: Sanchez, Ariel M 5 Question Answer Comment 6 Radioactivity wasn't checked or is

TestAmerica Cedar Falls Page 139 of 139 11/12/2015 1 2 3 4 5 ANALYTICAL REPORT 6 TestAmerica Laboratories, Inc. TestAmerica Cedar Falls 7 704 Enterprise Drive Cedar Falls, IA 50613 8 Tel: (319)277-2401 9 TestAmerica Job ID: 310-68161-2 TestAmerica Sample Delivery Group: 15428.01 10 Client Project/Site: 18th St Bridge - Sioux City , IA 11 For: Thiele Geotech Inc. 12 13478 Chandler Road Omaha, Nebraska 68138 13

Attn: Robert Miller 14

Authorized for release by: 12/2/2015 1:39:46 PM Angela Muehling, Project Manager I (319)277-2401 [email protected]

This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature.

Results relate only to the items tested and the sample(s) as received by the laboratory. Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 1 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Table of Contents Cover Page ...... 1 3 Table of Contents ...... 2 4 3 Case Narrative ...... 5 Sample Summary ...... 4 Detection Summary ...... 5 6 Client Sample Results ...... 6 7 Definitions ...... 7 8 QC Sample Results ...... 8 QC Association ...... 9 9 Chronicle ...... 10 10 Certification Summary ...... 11 Method Summary ...... 12 11 Chain of Custody ...... 13 12 Receipt Checklists ...... 14 13 14

TestAmerica Cedar Falls Page 2 of 14 12/2/2015 Case Narrative 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Job ID: 310-68161-2 3 Laboratory: TestAmerica Cedar Falls 4 Narrative Job Narrative 5 310-68161-2 6 Comments No additional comments. 7 Receipt The samples were received on 11/4/2015 9:35 AM; the samples arrived in good condition, properly preserved and, where required, on ice. 8 The temperatures of the 3 coolers at receipt time were 2.7º C, 3.0º C and 3.3º C. 9 Metals No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. 10 Organic Prep 11 Method(s) 1311: EPA Method 1311 requires the room temperature to be maintained at 23 +/- 2 degrees Celsius for the duration of the leaching process. For batch 110401, the temperature 18.7 - 21.9 degrees Celsius was outside of this range. 12 No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. 13 14

TestAmerica Cedar Falls Page 3 of 14 12/2/2015 Sample Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 3 Lab Sample ID Client Sample ID Matrix Collected Received 310-68161-9 B-17E 0-4' Soil 11/02/15 15:00 11/04/15 09:35 4 5 6 7 8 9 10 11 12 13 14

TestAmerica Cedar Falls

Page 4 of 14 12/2/2015 Detection Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 3 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 4 Barium 1.09 0.500 mg/L 1 6010C TCLP 5 6 7 8 9 10 11 12 13 14

This Detection Summary does not include radiochemical test results. TestAmerica Cedar Falls

Page 5 of 14 12/2/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 3 Date Collected: 11/02/15 15:00 Matrix: Soil Date Received: 11/04/15 09:35 4 Method: 6010C - Metals (ICP) - TCLP Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Arsenic <0.300 0.300 mg/L 12/01/15 12:14 12/02/15 11:10 1 Barium 1.09 0.500 mg/L 12/01/15 12:14 12/02/15 11:10 1 6 Cadmium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 11:10 1 Chromium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 11:10 1 7 Lead <0.100 0.100 mg/L 12/01/15 12:14 12/02/15 11:10 1 Selenium <0.150 0.150 mg/L 12/01/15 12:14 12/02/15 11:10 1 8 Silver <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 11:10 1 9 Method: 7470A - Mercury (CVAA) - TCLP Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.00200 H 0.00200 mg/L 12/01/15 12:35 12/01/15 15:42 1 10 11 12 13 14

TestAmerica Cedar Falls

Page 6 of 14 12/2/2015 Definitions/Glossary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Qualifiers 3 Metals 4 Qualifier Qualifier Description H Sample was prepped or analyzed beyond the specified holding time 5 Glossary 6 Abbreviation These commonly used abbreviations may or may not be present in this report. ¤ Listed under the "D" column to designate that the result is reported on a dry weight basis 7 %R Percent Recovery CFL Contains Free Liquid 8 CNF Contains no Free Liquid DER Duplicate error ratio (normalized absolute difference) 9 Dil Fac Dilution Factor DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample 10 DLC Decision level concentration MDA Minimum detectable activity 11 EDL Estimated Detection Limit MDC Minimum detectable concentration MDL Method Detection Limit 12 ML Minimum Level (Dioxin) NC Not Calculated 13 ND Not detected at the reporting limit (or MDL or EDL if shown) PQL Practical Quantitation Limit 14 QC Quality Control RER Relative error ratio RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin)

TestAmerica Cedar Falls

Page 7 of 14 12/2/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Method: 6010C - Metals (ICP) 3 Lab Sample ID: LB 310-110401/1-B Client Sample ID: Method Blank 4 Matrix: Solid Prep Type: TCLP Analysis Batch: 110921 Prep Batch: 110762 LB LB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Arsenic <0.300 0.300 mg/L 12/01/15 12:14 12/02/15 10:52 1 6 Barium <0.500 0.500 mg/L 12/01/15 12:14 12/02/15 10:52 1 Cadmium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 10:52 1 7 Chromium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 10:52 1 Lead <0.100 0.100 mg/L 12/01/15 12:14 12/02/15 10:52 1 8 Selenium <0.150 0.150 mg/L 12/01/15 12:14 12/02/15 10:52 1 Silver <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 10:52 1 9 Lab Sample ID: LCS 310-110401/2-B Client Sample ID: Lab Control Sample 10 Matrix: Solid Prep Type: TCLP Analysis Batch: 110921 Prep Batch: 110762 Spike LCS LCS %Rec. 11 Analyte Added Result Qualifier Unit D %Rec Limits Arsenic 4.00 4.299 mg/L 107 80 - 120 12 Barium 2.00 1.971 mg/L 99 80 - 120 Cadmium 2.00 1.995 mg/L 100 80 - 120 13 Chromium 2.00 2.079 mg/L 104 80 - 120 Lead 4.00 3.777 mg/L 94 80 - 120 14 Selenium 8.00 8.940 mg/L 112 80 - 120 Silver 2.00 2.140 mg/L 107 80 - 120

Method: 7470A - Mercury (CVAA)

Lab Sample ID: LB 310-110401/1-C Client Sample ID: Method Blank Matrix: Solid Prep Type: TCLP Analysis Batch: 110814 Prep Batch: 110765 LB LB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.00200 0.00200 mg/L 12/01/15 12:35 12/01/15 15:39 1

Lab Sample ID: LCS 310-110401/2-C Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: TCLP Analysis Batch: 110814 Prep Batch: 110765 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Mercury 0.0167 0.01801 mg/L 108 80 - 120

TestAmerica Cedar Falls

Page 8 of 14 12/2/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Metals 3 Leach Batch: 110401 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-9 B-17E 0-4' TCLP Soil 1311 5 LB 310-110401/1-B Method Blank TCLP Solid 1311 LB 310-110401/1-C Method Blank TCLP Solid 1311 6 LCS 310-110401/2-B Lab Control Sample TCLP Solid 1311 LCS 310-110401/2-C Lab Control Sample TCLP Solid 1311 7 Prep Batch: 110762

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 8 310-68161-9 B-17E 0-4' TCLP Soil 3010A 110401 LB 310-110401/1-B Method Blank TCLP Solid 3010A 110401 9 LCS 310-110401/2-B Lab Control Sample TCLP Solid 3010A 110401 10 Prep Batch: 110765 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 11 310-68161-9 B-17E 0-4' TCLP Soil 7470A 110401 LB 310-110401/1-C Method Blank TCLP Solid 7470A 110401 12 LCS 310-110401/2-C Lab Control Sample TCLP Solid 7470A 110401

Analysis Batch: 110814 13 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 14 310-68161-9 B-17E 0-4' TCLP Soil 7470A 110765 LB 310-110401/1-C Method Blank TCLP Solid 7470A 110765 LCS 310-110401/2-C Lab Control Sample TCLP Solid 7470A 110765

Analysis Batch: 110921

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68161-9 B-17E 0-4' TCLP Soil 6010C 110762 LB 310-110401/1-B Method Blank TCLP Solid 6010C 110762 LCS 310-110401/2-B Lab Control Sample TCLP Solid 6010C 110762

TestAmerica Cedar Falls

Page 9 of 14 12/2/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2

Client Sample ID: B-17E 0-4' Lab Sample ID: 310-68161-9 3 Date Collected: 11/02/15 15:00 Matrix: Soil Date Received: 11/04/15 09:35 4 Batch Batch Dilution Batch Prepared 5 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab TCLP Leach 1311 110401 11/30/15 11:51 EEE TAL CF TCLP Prep 3010A 110762 12/01/15 12:14 JNR TAL CF 6 TCLP Analysis 6010C 1 110921 12/02/15 11:10 OAD TAL CF 7 TCLP Leach 1311 110401 11/30/15 11:51 EEE TAL CF TCLP Prep 7470A 110765 12/01/15 12:35 SAD TAL CF TCLP Analysis 7470A 1 110814 12/01/15 15:42 SAD TAL CF 8

Laboratory References: 9 TAL CF = TestAmerica Cedar Falls, 704 Enterprise Drive, Cedar Falls, IA 50613, TEL (319)277-2401 10 11 12 13 14

TestAmerica Cedar Falls

Page 10 of 14 12/2/2015 Certification Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 Laboratory: TestAmerica Cedar Falls All certifications held by this laboratory are listed. Not all certifications are applicable to this report. 3

Authority Program EPA Region Certification ID Expiration Date 4 AIHA-LAP, LLC IHLAP 101044 11-01-16 Georgia State Program 4 N/A 09-29-16 5 Illinois NELAP 5 200024 11-29-16 Iowa State Program 7 007 12-01-15 * 6 Kansas NELAP 7 E-10341 01-31-15 * Minnesota NELAP 5 019-999-319 12-31-15 7 Minnesota (Petrofund) State Program 1 3349 08-22-16 North Dakota State Program 8 R-186 09-29-16 8 Oregon NELAP 10 IA100001 09-29-16 Wisconsin State Program 5 999917270 08-31-16 9 10 11 12 13 14

* Certification renewal pending - certification considered valid. TestAmerica Cedar Falls

Page 11 of 14 12/2/2015 Method Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68161-2 Project/Site: 18th St Bridge - Sioux City , IA SDG: 15428.01 2 3 Method Method Description Protocol Laboratory 6010C Metals (ICP) SW846 TAL CF 7470A Mercury (CVAA) SW846 TAL CF 4

Protocol References: 5 SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates. 6 Laboratory References: TAL CF = TestAmerica Cedar Falls, 704 Enterprise Drive, Cedar Falls, IA 50613, TEL (319)277-2401 7 8 9 10 11 12 13 14

TestAmerica Cedar Falls

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Page 13 of 14 12/2/2015 1 Login Sample Receipt Checklist 2

Client: Thiele Geotech Inc. Job Number: 310-68161-2 3 SDG Number: 15428.01 4 Login Number: 68161 List Source: TestAmerica Cedar Falls List Number: 1 Creator: Muehling, Angela C 5 Question Answer Comment 6 Radioactivity wasn't checked or is

TestAmerica Cedar Falls Page 14 of 14 12/2/2015 1 2 3 4 5 ANALYTICAL REPORT 6 TestAmerica Laboratories, Inc. TestAmerica Cedar Falls 7 704 Enterprise Drive Cedar Falls, IA 50613 8 Tel: (319)277-2401 9 TestAmerica Job ID: 310-68446-1 TestAmerica Sample Delivery Group: 15428.01 10 Client Project/Site: 18th St Bridge - Sioux City, IA 11 For: Thiele Geotech Inc. 12 13478 Chandler Road Omaha, Nebraska 68138 13

Attn: Robert Miller 14 15

Authorized for release by: 11/19/2015 4:17:48 PM Angela Muehling, Project Manager I (319)277-2401 [email protected]

This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature.

Results relate only to the items tested and the sample(s) as received by the laboratory. Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Table of Contents Cover Page ...... 1 3 Table of Contents ...... 2 4 3 Case Narrative ...... 5 Sample Summary ...... 6 Detection Summary ...... 7 6 Client Sample Results ...... 10 7 Definitions ...... 52 8 Surrogate Summary ...... 53 QC Sample Results ...... 59 9 QC Association ...... 98 10 Chronicle ...... 105 Certification Summary ...... 110 11 Method Summary ...... 111 12 Chain of Custody ...... 112 13 Receipt Checklists ...... 118 14 15

TestAmerica Cedar Falls Page 2 of 119 11/19/2015 Case Narrative 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Job ID: 310-68446-1 3 Laboratory: TestAmerica Cedar Falls 4 Narrative Job Narrative 5 310-68446-1 6 Comments No additional comments. 7 Receipt The samples were received on 11/6/2015 10:00 AM; the samples arrived in good condition, properly preserved and, where required, on 8 ice. The temperatures of the 3 coolers at receipt time were 1.1º C, 2.2º C and 2.4º C. 9 GC/MS VOA Method(s) 8260C: The continuing calibration verification (CCV) associated with batch 310-107904 recovered above the upper control limit 10 for Trichlorofluoromethane(22.1%D). The samples associated with this CCV were non-detects for the affected analytes; therefore, the data have been reported. 11 Method(s) 8260C: The laboratory control sample (LCS) and / or laboratory control sample duplicate (LCSD) for preparation batch 310-107903 and analytical batch 310-107904 recovered outside control limits for the following analyte: 1,1,1-Trichloroethane. The analyte 12 was biased high in the LCS and was not detected in the associated samples; therefore, the data have been reported. 13 Method(s) 8260C: The continuing calibration verification (CCV) associated with batch 310-108662 recovered above the upper control limit for Trichlorofluoromethane (26.4 %D). The samples associated with this CCV were non-detects for the affected analytes; therefore, the 14 data have been reported.

Method(s) 8260C: The initial calibration verification (ICV) result for batch 310-108662 was above the upper control limit for 15 Dichlorodifluoromethane (34.3 %D). Sample results were non-detects, and have been reported as qualified data.

Method(s) 8260C: The continuing calibration verification (CCV) associated with batch 310-108840 recovered above the upper control limit for Carbon disulfide (21 %D), 1,1-Dichloropropene (21.6 %D) and 1,1-Dichloroethene (20.1 %D). The LCS associated with this CCV passes using CCV criteria for the affected analytes; therefore, the data have been reported.

Method(s) 8260C: The continuing calibration verification (CCV) associated with batch 310-109055 recovered outside the control limits for Bromomethane(-52.0%D).

Method(s) 8260C: The continuing calibration verification (CCV) associated with batch 310-109055 recovered above the upper control limit for Chlorodibromomethane(27.2%D) and Bromoform(22.7%D). The samples associated with this CCV were non-detects for the affected analytes; therefore, the data have been reported.

Method(s) 8260C: The continuing calibration verification (CCV) associated with batch 310-109250 recovered above the upper control limit for Chlorodibromomethane(23.8%D) and Bromoform(30.4%D). The samples associated with this CCV were non-detects for the affected analytes; therefore, the data have been reported.

Method(s) 8260C: The laboratory control sample (LCS) and / or laboratory control sample duplicate (LCSD) for preparation batch 310-109247 and analytical batch 310-109250 recovered outside control limits for multiple analytes. These analytes were biased high in the LCS and were not detected in the associated samples; therefore, the data have been reported.

Method(s) 8260C: The %RPD of the laboratory control sample (LCS) and laboratory control standard duplicate (LCSD) for preparation batch 310-109247 recovered outside control limits for the following analyte: Hexane.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

GC/MS Semi VOA Method(s) 8270D: The following samples was diluted due to the nature of the sample matrix: B-2E 0-1.5' (310-68446-1), B-3E 0-1' (310-68446-2), B-4E 0-1' (310-68446-4) and B-6E 0-1.4' (310-68446-6). Elevated reporting limits (RLs) are provided.

Method(s) 8270D: Surrogate recovery for the following samples was outside control limits: B-2E 0-1.5' (310-68446-1), B-3E 0-1'

TestAmerica Cedar Falls Page 3 of 119 11/19/2015 Case Narrative 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Job ID: 310-68446-1 (Continued) 3 Laboratory: TestAmerica Cedar Falls (Continued) 4 (310-68446-2) and B-6E 0-1.4' (310-68446-6). Evidence of matrix interference is present; therefore, re-extraction and/or re-analysis was not performed. 5 Method(s) 8270D: The laboratory control sample (LCS) for batch preparation batch 310-108193 and analytical batch 310-108902 recovered outside control limits for the following analyte: 2,4-Dinitrotoluene. 6

Method(s) 8270D: The %RPD of the laboratory control sample (LCS) and laboratory control standard duplicate (LCSD) for preparation 7 batch 310-108193 recovered outside control limits for the following analytes: 1,4-Dichlorobenzene and 4-Chloroaniline. 8 Method(s) 8270D: The continuing calibration verification (CCV) associated with batch 310-108902 recovered above the upper control limit for Hexachlorocyclopentadiene (23.1%D). The samples associated with this CCV were non-detects for the affected analytes; therefore, the data have been reported. 9

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. 10

GC Semi VOA 11 Method(s) OA-2: Surrogate recovery for the following samples was outside control limits: B-2E 0-1.5' (310-68446-1), B-3E 0-1' (310-68446-2) and B-6E 0-1.4' (310-68446-6). Evidence of matrix interference is present; therefore, re-extraction and/or re-analysis was 12 not performed.

Method(s) OA-2: The %RPD of the laboratory control sample (LCS) and laboratory control standard duplicate (LCSD) for preparation batch 13 310-108191 recovered outside control limits for the following analyte: Diesel. 14 Method(s) 8082A: The laboratory control sample (LCS) for batch preparation batch 310-108353 and analytical batch 310-108703 recovered outside control limits for the following analyte: PCB-1016. The analyte was biased high in the LCS and was not detected in the 15 associated samples; therefore, the data have been reported.

Method(s) 8082A: Surrogate recovery for the following sample was outside control limits: B-3E 0-1' (310-68446-2). Re-extraction and re-analysis was performed with concurring results.

Method(s) 8081B: The following samples was diluted due to the nature of the sample matrix: B-2E 0-1.5' (310-68446-1), B-3E 0-1' (310-68446-2), B-4E 0-1' (310-68446-4) and B-6E 0-1.4' (310-68446-6). Elevated reporting limits (RLs) are provided.

Method(s) 8081B: The following samples required a mercury clean-up, via EPA Method 3660A, to reduce matrix interferences caused by sulfur: B-2E 0-1.5' (310-68446-1), B-3E 0-1' (310-68446-2), B-4E 0-1' (310-68446-4), B-5E 0.5-3' (310-68446-5) and B-6E 0-1.4' (310-68446-6).

Method(s) 8081B: The following samples required a dilution due to the nature of the sample matrix: B-4E 0-1' (310-68446-4) and B-6E 0-1.4' (310-68446-6). Because of this dilution, the surrogate spike concentration in the sample was reduced to a level where the recovery calculation does not provide useful information.

Method(s) 8081B: Surrogate recovery for the following samples were outside control limits: B-2E 0-1.5' (310-68446-1) and B-3E 0-1' (310-68446-2). Evidence of matrix interference is present; therefore, re-extraction and re-analysis was not performed.

Method(s) 8081B: Surrogate recovery for the following samples were outside of acceptance limits: B-2E (310-68446-7), B-4E (310-68446-8), and B-5E (310-68446-9). There was insufficient sample to perform a re-extraction; therefore, the data have been reported.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

Metals Method(s) 6010C: The following samples was diluted due to the presence of an interferent: B-3E 0-1' (310-68446-2) and B-6E 0-1.4' (310-68446-6). Elevated reporting limits (RLs) are provided.

Method(s) 3010A: The reference method requires samples to be preserved to a pH of <2. The following samples was received with insufficient preservation at a pH of >2: B-2E (310-68446-7) and B-4E (310-68446-8). The sample(s) was preserved to the appropriate pH

TestAmerica Cedar Falls Page 4 of 119 11/19/2015 Case Narrative 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Job ID: 310-68446-1 (Continued) 3 Laboratory: TestAmerica Cedar Falls (Continued) 4 in the laboratory. 5 Method(s) 3010A: The following sample was received with insufficient preservation: B-5E (310-68446-9). The maximum amount of preservative was added by the laboratory, but the sample remained strongly basic. No further attempt was made to acidify the sample, as it would have diluted the sample. 6

Method(s) 7470A: The reference method requires samples to be preserved to a pH of >2. The following samples was received with 7 insufficient preservation at a pH of >2: B-2E (310-68446-7) and B-4E (310-68446-8). The sample(s) was preserved to the appropriate pH in the laboratory. 8

Method(s) 7470A: The following sample was received with insufficient preservation: B-5E (310-68446-9). The maximum amount of preservative was added by the laboratory, but the sample remained strongly basic. No further attempt was made to acidify the sample, as 9 it would have diluted the sample. 10 Method(s) 6020A: The following sample was diluted due to the nature of the sample matrix: B-4E (310-68446-8). Elevated reporting limits (RLs) are provided. 11 No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. 12 General Chemistry No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. 13

Organic Prep 14 Method(s) 3546: The following sample was prepared with less sample due to insufficient sample volume for the PCB extraction: B-2E 0-1.5' (310-68446-1). Elevated reporting limits (RLs) are provided. This sample had to be reprepped due to low surrogate recovery on the 15 initial analysis and was also used as the matrix spike/matrix spike duplicate.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

VOA Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.

TestAmerica Cedar Falls Page 5 of 119 11/19/2015 Sample Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 3 Lab Sample ID Client Sample ID Matrix Collected Received 310-68446-1 B-2E 0-1.5' Soil 11/04/15 14:55 11/06/15 10:00 310-68446-2 B-3E 0-1' Soil 11/04/15 13:35 11/06/15 10:00 4 310-68446-3 B-3E 1-2' Soil 11/04/15 13:40 11/06/15 10:00 310-68446-4 B-4E 0-1' Soil 11/04/15 11:05 11/06/15 10:00 5 310-68446-5 B-5E 0.5-3' Soil 11/04/15 09:45 11/06/15 10:00 310-68446-6 B-6E 0-1.4' Soil 11/04/15 08:35 11/06/15 10:00 6 310-68446-7 B-2E Ground Water 11/05/15 08:55 11/06/15 10:00 310-68446-8 B-4E Ground Water 11/05/15 11:00 11/06/15 10:00 7 310-68446-9 B-5E Ground Water 11/05/15 13:10 11/06/15 10:00 310-68446-10 Trip Blank Water 11/04/15 00:00 11/06/15 10:00 8 9 10 11 12 13 14 15

TestAmerica Cedar Falls

Page 6 of 119 11/19/2015 Detection Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 3 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 4 Acetone 621 562 ug/Kg 1 ☼ 8260C Total/NA 2-Butanone (MEK) 338 281 ug/Kg 1 ☼ 8260C Total/NA Toluene 195 112 ug/Kg 1 ☼ 8260C Total/NA 5 1,2,4-Trimethylbenzene 114 112 ug/Kg 1 ☼ 8260C Total/NA Xylenes, Total 361 168 ug/Kg 1 ☼ 8260C Total/NA 6 Waste Oil 486 9.95 mg/Kg 1 OA-2 Total/NA Total Extractable Hydrocarbons 526 14.9 mg/Kg 1 OA-2 Total/NA 7 Antimony 60.8 5.15 mg/Kg 1 ☼ 6010C Total/NA Arsenic 10.4 4.12 mg/Kg 1 ☼ 6010C Total/NA 8 Chromium 7.95 1.03 mg/Kg 1 ☼ 6010C Total/NA Copper 75.7 1.03 mg/Kg 1 ☼ 6010C Total/NA 9 Lead 484 5.15 mg/Kg 1 ☼ 6010C Total/NA Nickel 10.2 2.57 mg/Kg 1 ☼ 6010C Total/NA 10 Zinc 39.5 1.03 mg/Kg 1 ☼ 6010C Total/NA Mercury 0.0706 0.0222 mg/Kg 1 ☼ 7471B Total/NA 11 Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 12

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Waste Oil 832 9.73 mg/Kg 1 OA-2 Total/NA 13 Total Extractable Hydrocarbons 865 14.6 mg/Kg 1 OA-2 Total/NA Antimony 1450 15.4 mg/Kg 3 ☼ 6010C Total/NA 14 Arsenic 21.6 12.3 mg/Kg 3 ☼ 6010C Total/NA Chromium 14.0 3.07 mg/Kg 3 ☼ 6010C Total/NA 15 Copper 1970 3.07 mg/Kg 3 ☼ 6010C Total/NA Lead 21900 15.4 mg/Kg 3 ☼ 6010C Total/NA Nickel 23.6 7.68 mg/Kg 3 ☼ 6010C Total/NA Zinc 499 3.07 mg/Kg 3 ☼ 6010C Total/NA Mercury 0.0343 0.0190 mg/Kg 1 ☼ 7471B Total/NA

Client Sample ID: B-3E 1-2' Lab Sample ID: 310-68446-3

No Detections.

Client Sample ID: B-4E 0-1' Lab Sample ID: 310-68446-4

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Total Extractable Hydrocarbons Z38.7 14.8 mg/Kg 1 OA-2 Total/NA Antimony 9.59 4.97 mg/Kg 1 ☼ 6010C Total/NA Arsenic 10.0 3.98 mg/Kg 1 ☼ 6010C Total/NA Beryllium 0.521 0.497 mg/Kg 1 ☼ 6010C Total/NA Chromium 15.0 0.994 mg/Kg 1 ☼ 6010C Total/NA Copper 29.2 0.994 mg/Kg 1 ☼ 6010C Total/NA Lead 86.1 4.97 mg/Kg 1 ☼ 6010C Total/NA Nickel 21.3 2.49 mg/Kg 1 ☼ 6010C Total/NA Zinc 70.0 0.994 mg/Kg 1 ☼ 6010C Total/NA Mercury 0.0362 0.0222 mg/Kg 1 ☼ 7471B Total/NA

Client Sample ID: B-5E 0.5-3' Lab Sample ID: 310-68446-5

This Detection Summary does not include radiochemical test results. TestAmerica Cedar Falls

Page 7 of 119 11/19/2015 Detection Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E 0.5-3' (Continued) Lab Sample ID: 310-68446-5 3

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Waste Oil 90.3 9.71 mg/Kg 1 OA-2 Total/NA 4 Total Extractable Hydrocarbons 95.3 14.6 mg/Kg 1 OA-2 Total/NA Arsenic 10.9 4.54 mg/Kg 1 ☼ 6010C Total/NA 5 Chromium 16.5 1.13 mg/Kg 1 ☼ 6010C Total/NA Copper 17.7 1.13 mg/Kg 1 ☼ 6010C Total/NA 6 Lead 11.7 5.67 mg/Kg 1 ☼ 6010C Total/NA Nickel 25.9 2.84 mg/Kg 1 ☼ 6010C Total/NA 7 Zinc 63.0 1.13 mg/Kg 1 ☼ 6010C Total/NA Mercury 0.0223 0.0209 mg/Kg 1 ☼ 7471B Total/NA 8

Client Sample ID: B-6E 0-1.4' Lab Sample ID: 310-68446-6 9 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 10 Waste Oil 762 9.90 mg/Kg 1 OA-2 Total/NA Total Extractable Hydrocarbons 875 14.9 mg/Kg 1 OA-2 Total/NA 11 Arsenic 18.2 8.87 mg/Kg 2 ☼ 6010C Total/NA Chromium 25.6 2.22 mg/Kg 2 ☼ 6010C Total/NA 12 Copper 103 2.22 mg/Kg 2 ☼ 6010C Total/NA Lead 361 11.1 mg/Kg 2 ☼ 6010C Total/NA Nickel 19.6 5.54 mg/Kg 2 ☼ 6010C Total/NA 13 Zinc 391 2.22 mg/Kg 2 ☼ 6010C Total/NA Mercury 0.474 0.0222 mg/Kg 1 ☼ 7471B Total/NA 14

Client Sample ID: B-2E Lab Sample ID: 310-68446-7 15

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Antimony 0.00108 0.00100 mg/L 1 6020A Total/NA Arsenic 0.00880 0.00200 mg/L 1 6020A Total/NA Cadmium 0.00243 0.000500 mg/L 1 6020A Total/NA Chromium 0.0250 0.00500 mg/L 1 6020A Total/NA Copper 0.0954 0.00200 mg/L 1 6020A Total/NA Lead 0.0990 0.000500 mg/L 1 6020A Total/NA Nickel 0.0321 0.00500 mg/L 1 6020A Total/NA Selenium 0.00699 0.00500 mg/L 1 6020A Total/NA Zinc 0.0390 0.0100 mg/L 1 6020A Total/NA

Client Sample ID: B-4E Lab Sample ID: 310-68446-8

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Arsenic 0.00790 0.00200 mg/L 1 6020A Total/NA Cadmium 0.00622 0.000500 mg/L 1 6020A Total/NA Chromium 0.0282 0.00500 mg/L 1 6020A Total/NA Copper 0.0285 0.00200 mg/L 1 6020A Total/NA Lead 0.0370 0.000500 mg/L 1 6020A Total/NA Nickel 0.0530 0.00500 mg/L 1 6020A Total/NA Selenium 0.0146 0.00500 mg/L 1 6020A Total/NA Zinc 0.0357 0.0100 mg/L 1 6020A Total/NA Mercury 0.000644 0.000200 mg/L 1 7470A Total/NA

Client Sample ID: B-5E Lab Sample ID: 310-68446-9

This Detection Summary does not include radiochemical test results. TestAmerica Cedar Falls

Page 8 of 119 11/19/2015 Detection Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E (Continued) Lab Sample ID: 310-68446-9 3

Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Bis(2-ethylhexyl) phthalate 13.2 10.1 ug/L 1 8270D Total/NA 4 Arsenic 0.00324 0.00200 mg/L 1 6020A Total/NA Cadmium 0.00766 0.000500 mg/L 1 6020A Total/NA 5 Chromium 0.0171 0.00500 mg/L 1 6020A Total/NA Copper 0.0228 0.00200 mg/L 1 6020A Total/NA 6 Lead 0.00141 0.000500 mg/L 1 6020A Total/NA Nickel 0.208 0.00500 mg/L 1 6020A Total/NA 7 Selenium 0.00924 0.00500 mg/L 1 6020A Total/NA Zinc 0.0519 0.0100 mg/L 1 6020A Total/NA 8 Mercury 0.00422 0.000200 mg/L 1 7470A Total/NA 9 Client Sample ID: Trip Blank Lab Sample ID: 310-68446-10 10 No Detections. 11 12 13 14 15

This Detection Summary does not include radiochemical test results. TestAmerica Cedar Falls

Page 9 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 3 Date Collected: 11/04/15 14:55 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 88.8 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone 621 562 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Benzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 6 Bromobenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Bromochloromethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 7 Bromodichloromethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Bromoform <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 8 Bromomethane <562 562 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 2-Butanone (MEK) 338 281 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 9 n-Butylbenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 sec-Butylbenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 10 tert-Butylbenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Carbon disulfide <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Carbon tetrachloride <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 11 Chlorobenzene <112 * 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Chlorodibromomethane <112 * 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 12 Chloroethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Chloroform <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 13 Chloromethane <281 281 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 2-Chlorotoluene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 14 4-Chlorotoluene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,2-Dibromo-3-Chloropropane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 15 1,2-Dibromoethane (EDB) <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Dibromomethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,2-Dichlorobenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,3-Dichlorobenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,4-Dichlorobenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Dichlorodifluoromethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,1-Dichloroethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,2-Dichloroethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,1-Dichloroethene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 cis-1,2-Dichloroethene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 trans-1,2-Dichloroethene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,2-Dichloropropane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,3-Dichloropropane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 2,2-Dichloropropane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,1-Dichloropropene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 cis-1,3-Dichloropropene <112 * 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 trans-1,3-Dichloropropene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Ethylbenzene <112 * 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Hexachlorobutadiene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Hexane <112 * 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Isopropylbenzene <112 * 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 p-Isopropyltoluene <112 * 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Methylene Chloride <281 281 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Methyl tert-butyl ether <112 * 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Naphthalene <281 281 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 N-Propylbenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Styrene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,1,1,2-Tetrachloroethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1

TestAmerica Cedar Falls

Page 10 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 Date Collected: 11/04/15 14:55 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 88.8 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Tetrachloroethene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 6 Toluene 195 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,2,3-Trichlorobenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 7 1,2,4-Trichlorobenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,1,1-Trichloroethane <112 * 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 8 1,1,2-Trichloroethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Trichloroethene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Trichlorofluoromethane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 9 1,2,3-Trichloropropane <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 1,2,4-Trimethylbenzene 114 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 10 1,3,5-Trimethylbenzene <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 Vinyl chloride <112 112 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 11 Xylenes, Total 361 168 ug/Kg ☼ 11/18/15 07:48 11/18/15 12:54 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 101 80 - 120 11/18/15 07:48 11/18/15 12:54 1 13 Dibromofluoromethane (Surr) 95 75 - 125 11/18/15 07:48 11/18/15 12:54 1 Toluene-d8 (Surr) 100 80 - 120 11/18/15 07:48 11/18/15 12:54 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Benzo[a]anthracene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Benzo[a]pyrene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Benzidine <36700 36700 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Benzo[b]fluoranthene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Benzo[g,h,i]perylene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Benzo[k]fluoranthene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Acenaphthene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Acenaphthylene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Benzyl alcohol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Butyl benzyl phthalate <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Bis(2-chloroethyl)ether <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Bis(2-chloroethoxy)methane <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Bis(2-ethylhexyl) phthalate <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 bis (2-chloroisopropyl) ether <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 4-Bromophenyl phenyl ether <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Carbazole <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 4-Chloroaniline <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2-Chloronaphthalene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 4-Chlorophenyl phenyl ether <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Chrysene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Dibenz(a,h)anthracene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Dibenzofuran <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Di-n-butyl phthalate <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 1,2-Dichlorobenzene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 1,3-Dichlorobenzene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 1,4-Dichlorobenzene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 3,3'-Dichlorobenzidine <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10

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Page 11 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 Date Collected: 11/04/15 14:55 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 88.8 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Dimethyl phthalate <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 6 2,4-Dinitrotoluene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2,6-Dinitrotoluene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 7 Fluorene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Hexachlorobenzene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 8 Hexachlorobutadiene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Hexachlorocyclopentadiene <7350 7350 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Hexachloroethane <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 9 Di-n-octyl phthalate <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Fluoranthene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 10 Indeno[1,2,3-cd]pyrene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Isophorone <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 11 2-Methylnaphthalene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Naphthalene <2230 2230 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 12 2-Nitroaniline <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 3-Nitroaniline <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 13 4-Nitroaniline <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Nitrobenzene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 14 N-Nitrosodiphenylamine <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 N-Nitrosodi-n-propylamine <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 15 N-Nitrosodimethylamine <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Phenanthrene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Pyrene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Pyridine <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 1,2,4-Trichlorobenzene <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Benzoic acid <7350 7350 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 4-Chloro-3-methylphenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2-Chlorophenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Total Cresols <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2,4-Dichlorophenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2,4-Dimethylphenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2,4-Dinitrophenol <7350 7350 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 4,6-Dinitro-2-methylphenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2-Methylphenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Methylphenol, 3 & 4 <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2-Nitrophenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 4-Nitrophenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Pentachlorophenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 Phenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2,4,5-Trichlorophenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10 2,4,6-Trichlorophenol <3670 3670 ug/Kg ☼ 11/10/15 08:00 11/12/15 18:50 10

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 14 X 15 - 90 11/10/15 08:00 11/12/15 18:50 10 Phenol-d6 (Surr) 17 X 20 - 90 11/10/15 08:00 11/12/15 18:50 10 Nitrobenzene-d5 (Surr) 24 15 - 90 11/10/15 08:00 11/12/15 18:50 10 2-Fluorobiphenyl (Surr) 26 20 - 90 11/10/15 08:00 11/12/15 18:50 10 2,4,6-Tribromophenol (Surr) 19 X 25 - 105 11/10/15 08:00 11/12/15 18:50 10 Terphenyl-d14 (Surr) 33 X 35 - 110 11/10/15 08:00 11/12/15 18:50 10

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Page 12 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 3 Aldrin <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 alpha-BHC <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 4 beta-BHC <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 Chlordane (technical) <74.6 74.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 5 4,4'-DDD <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 4,4'-DDE <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 6 4,4'-DDT <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 delta-BHC <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 7 Dieldrin <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 Endosulfan I <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 8 Endosulfan II <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 Endosulfan sulfate <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 9 Endrin <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 Endrin aldehyde <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 10 gamma-BHC (Lindane) <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 Heptachlor <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 Heptachlor epoxide <18.9 18.9 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:03 10 11 ☼ Toxaphene <186 186 ug/Kg 11/10/15 19:00 11/12/15 19:03 10 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 111 56 - 128 11/10/15 19:00 11/12/15 19:03 10 13 Tetrachloro-m-xylene 115 X 45 - 112 11/10/15 19:00 11/12/15 19:03 10 14 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.125 * F2 0.125 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:04 1 15 PCB-1221 <0.125 0.125 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:04 1 PCB-1232 <0.125 0.125 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:04 1 PCB-1242 <0.125 0.125 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:04 1 PCB-1248 <0.125 0.125 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:04 1 PCB-1254 <0.125 0.125 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:04 1 PCB-1260 <0.125 F2 0.125 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:04 1 PCB-1268 <0.125 0.125 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:04 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 58 40 - 120 11/12/15 14:00 11/13/15 18:04 1 Tetrachloro-m-xylene 40 10 - 105 11/12/15 14:00 11/13/15 18:04 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.95 9.95 mg/Kg 11/10/15 07:56 11/11/15 19:41 1 Gasoline <9.95 9.95 mg/Kg 11/10/15 07:56 11/11/15 19:41 1 Waste Oil 486 9.95 mg/Kg 11/10/15 07:56 11/11/15 19:41 1 Total Extractable Hydrocarbons 526 14.9 mg/Kg 11/10/15 07:56 11/11/15 19:41 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 137 X 40 - 135 11/10/15 07:56 11/11/15 19:41 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony 60.8 5.15 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 Arsenic 10.4 4.12 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 Beryllium <0.515 0.515 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 Cadmium <1.03 1.03 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 Chromium 7.95 1.03 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1

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Page 13 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 Date Collected: 11/04/15 14:55 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 88.8 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Copper 75.7 1.03 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 Lead 484 5.15 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 6 Nickel 10.2 2.57 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 Selenium <7.72 7.72 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 7 Silver <1.03 1.03 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 Zinc 39.5 1.03 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:13 1 8 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 9 Thallium <1.08 1.08 mg/Kg ☼ 11/09/15 10:31 11/17/15 17:36 4 10 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Mercury 0.0706 0.0222 mg/Kg ☼ 11/11/15 10:29 11/12/15 11:11 1 12 13 14 15

TestAmerica Cedar Falls

Page 14 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 3 Date Collected: 11/04/15 13:35 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 92.5 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Anthracene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Benzo[a]anthracene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 6 Benzo[a]pyrene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Benzidine <35500 35500 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 7 Benzo[b]fluoranthene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Benzo[g,h,i]perylene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 8 Benzo[k]fluoranthene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Acenaphthene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 9 Acenaphthylene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Benzyl alcohol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 10 Butyl benzyl phthalate <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Bis(2-chloroethyl)ether <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Bis(2-chloroethoxy)methane <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 11 Bis(2-ethylhexyl) phthalate <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 bis (2-chloroisopropyl) ether <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 12 4-Bromophenyl phenyl ether <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Carbazole <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 13 4-Chloroaniline <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 2-Chloronaphthalene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 14 4-Chlorophenyl phenyl ether <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Chrysene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 15 Dibenz(a,h)anthracene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Dibenzofuran <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Di-n-butyl phthalate <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 1,2-Dichlorobenzene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 1,3-Dichlorobenzene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 1,4-Dichlorobenzene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 3,3'-Dichlorobenzidine <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Diethyl phthalate <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Dimethyl phthalate <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 2,4-Dinitrotoluene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 2,6-Dinitrotoluene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Fluorene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Hexachlorobenzene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Hexachlorobutadiene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Hexachlorocyclopentadiene <7100 7100 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Hexachloroethane <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Di-n-octyl phthalate <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Fluoranthene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Indeno[1,2,3-cd]pyrene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Isophorone <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 2-Methylnaphthalene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Naphthalene <2150 2150 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 2-Nitroaniline <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 3-Nitroaniline <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 4-Nitroaniline <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Nitrobenzene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 N-Nitrosodiphenylamine <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 N-Nitrosodi-n-propylamine <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10

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Page 15 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 Date Collected: 11/04/15 13:35 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 92.5 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 N-Nitrosodimethylamine <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Phenanthrene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 6 Pyrene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Pyridine <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 7 1,2,4-Trichlorobenzene <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Benzoic acid <7100 7100 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 8 4-Chloro-3-methylphenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 2-Chlorophenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Total Cresols <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 9 2,4-Dichlorophenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 2,4-Dimethylphenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 10 2,4-Dinitrophenol <7100 7100 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 4,6-Dinitro-2-methylphenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 11 2-Methylphenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Methylphenol, 3 & 4 <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 12 2-Nitrophenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 4-Nitrophenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 13 Pentachlorophenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 Phenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 14 2,4,5-Trichlorophenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 2,4,6-Trichlorophenol <3550 3550 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:28 10 15 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 15 15 - 90 11/10/15 08:00 11/12/15 20:28 10 Phenol-d6 (Surr) 17 X 20 - 90 11/10/15 08:00 11/12/15 20:28 10 Nitrobenzene-d5 (Surr) 19 15 - 90 11/10/15 08:00 11/12/15 20:28 10 2-Fluorobiphenyl (Surr) 23 20 - 90 11/10/15 08:00 11/12/15 20:28 10 2,4,6-Tribromophenol (Surr) 24 X 25 - 105 11/10/15 08:00 11/12/15 20:28 10 Terphenyl-d14 (Surr) 29 X 35 - 110 11/10/15 08:00 11/12/15 20:28 10

Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aldrin <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 alpha-BHC <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 beta-BHC <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Chlordane (technical) <72.2 72.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 4,4'-DDD <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 4,4'-DDE <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 4,4'-DDT <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 delta-BHC <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Dieldrin <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Endosulfan I <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Endosulfan II <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Endosulfan sulfate <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Endrin <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Endrin aldehyde <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 gamma-BHC (Lindane) <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Heptachlor <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Heptachlor epoxide <18.3 18.3 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10 Toxaphene <180 180 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:24 10

TestAmerica Cedar Falls

Page 16 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 Date Collected: 11/04/15 13:35 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 92.5 4

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 162 X 56 - 128 11/10/15 19:00 11/12/15 19:24 10 5 Tetrachloro-m-xylene 95 45 - 112 11/10/15 19:00 11/12/15 19:24 10 6 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 7 PCB-1016 <0.0532 0.0532 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:15 1 PCB-1221 <0.0532 0.0532 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:15 1 8 PCB-1232 <0.0532 0.0532 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:15 1 PCB-1242 <0.0532 0.0532 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:15 1 9 PCB-1248 <0.0532 0.0532 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:15 1 PCB-1254 <0.0532 0.0532 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:15 1 10 PCB-1260 <0.0532 0.0532 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:15 1 PCB-1268 <0.0532 0.0532 mg/Kg ☼ 11/12/15 14:00 11/13/15 18:15 1 11 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 21 X 40 - 120 11/12/15 14:00 11/13/15 18:15 1 12 Tetrachloro-m-xylene 19 10 - 105 11/12/15 14:00 11/13/15 18:15 1 13 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 14 Diesel <9.73 9.73 mg/Kg 11/10/15 07:56 11/11/15 19:55 1 Gasoline <9.73 9.73 mg/Kg 11/10/15 07:56 11/11/15 19:55 1 Waste Oil 832 9.73 mg/Kg 11/10/15 07:56 11/11/15 19:55 1 15 Total Extractable Hydrocarbons 865 14.6 mg/Kg 11/10/15 07:56 11/11/15 19:55 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 141 X 40 - 135 11/10/15 07:56 11/11/15 19:55 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony 1450 15.4 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Arsenic 21.6 12.3 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Beryllium <1.54 1.54 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Cadmium <3.07 3.07 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Chromium 14.0 3.07 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Copper 1970 3.07 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Lead 21900 15.4 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Nickel 23.6 7.68 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Selenium <23.0 23.0 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Silver <3.07 3.07 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3 Zinc 499 3.07 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:43 3

Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Thallium <0.905 0.905 mg/Kg ☼ 11/09/15 10:31 11/17/15 17:40 4

Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury 0.0343 0.0190 mg/Kg ☼ 11/11/15 10:29 11/12/15 11:12 1

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Page 17 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-3E 1-2' Lab Sample ID: 310-68446-3 3 Date Collected: 11/04/15 13:40 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 84.9 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <126 126 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Benzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 6 Bromobenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Bromochloromethane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 7 Bromodichloromethane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Bromoform <25.3 25.3 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 8 Bromomethane <50.5 50.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 2-Butanone (MEK) <126 126 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 9 n-Butylbenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 sec-Butylbenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 10 tert-Butylbenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Carbon disulfide <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Carbon tetrachloride <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 11 Chlorobenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Chlorodibromomethane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 12 Chloroethane <50.5 50.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Chloroform <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 13 Chloromethane <50.5 50.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 2-Chlorotoluene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 14 4-Chlorotoluene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,2-Dibromo-3-Chloropropane <126 126 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 15 1,2-Dibromoethane (EDB) <126 126 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Dibromomethane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,2-Dichlorobenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,3-Dichlorobenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,4-Dichlorobenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Dichlorodifluoromethane <37.9 37.9 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,1-Dichloroethane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,2-Dichloroethane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,1-Dichloroethene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 cis-1,2-Dichloroethene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 trans-1,2-Dichloroethene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,2-Dichloropropane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,3-Dichloropropane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 2,2-Dichloropropane <50.5 50.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,1-Dichloropropene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 cis-1,3-Dichloropropene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 trans-1,3-Dichloropropene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Ethylbenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Hexachlorobutadiene <63.1 63.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Hexane <63.1 63.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Isopropylbenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 p-Isopropyltoluene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Methylene Chloride <126 126 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Methyl tert-butyl ether <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Naphthalene <63.1 63.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 N-Propylbenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Styrene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,1,1,2-Tetrachloroethane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1

TestAmerica Cedar Falls

Page 18 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-3E 1-2' Lab Sample ID: 310-68446-3 Date Collected: 11/04/15 13:40 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 84.9 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Tetrachloroethene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 6 Toluene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,2,3-Trichlorobenzene <63.1 63.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 7 1,2,4-Trichlorobenzene <63.1 63.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,1,1-Trichloroethane <12.6 * 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 8 1,1,2-Trichloroethane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Trichloroethene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Trichlorofluoromethane <50.5 50.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 9 1,2,3-Trichloropropane <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 1,2,4-Trimethylbenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 10 1,3,5-Trimethylbenzene <12.6 12.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 Vinyl chloride <37.9 37.9 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 11 Xylenes, Total <37.9 37.9 ug/Kg ☼ 11/09/15 10:48 11/09/15 18:37 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 101 80 - 120 11/09/15 10:48 11/09/15 18:37 1 13 Dibromofluoromethane (Surr) 90 75 - 125 11/09/15 10:48 11/09/15 18:37 1 Toluene-d8 (Surr) 96 80 - 120 11/09/15 10:48 11/09/15 18:37 1 14 15

TestAmerica Cedar Falls

Page 19 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-4E 0-1' Lab Sample ID: 310-68446-4 3 Date Collected: 11/04/15 11:05 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 89.9 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <118 118 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Benzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 6 Bromobenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Bromochloromethane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 7 Bromodichloromethane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Bromoform <23.6 23.6 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 8 Bromomethane <47.3 47.3 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 2-Butanone (MEK) <118 118 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 9 n-Butylbenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 sec-Butylbenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 10 tert-Butylbenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Carbon disulfide <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Carbon tetrachloride <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 11 Chlorobenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Chlorodibromomethane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 12 Chloroethane <47.3 47.3 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Chloroform <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 13 Chloromethane <47.3 47.3 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 2-Chlorotoluene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 14 4-Chlorotoluene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,2-Dibromo-3-Chloropropane <118 118 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 15 1,2-Dibromoethane (EDB) <118 118 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Dibromomethane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,2-Dichlorobenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,3-Dichlorobenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,4-Dichlorobenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Dichlorodifluoromethane <35.5 35.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,1-Dichloroethane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,2-Dichloroethane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,1-Dichloroethene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 cis-1,2-Dichloroethene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 trans-1,2-Dichloroethene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,2-Dichloropropane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,3-Dichloropropane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 2,2-Dichloropropane <47.3 47.3 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,1-Dichloropropene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 cis-1,3-Dichloropropene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 trans-1,3-Dichloropropene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Ethylbenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Hexachlorobutadiene <59.1 59.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Hexane <59.1 59.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Isopropylbenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 p-Isopropyltoluene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Methylene Chloride <118 118 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Methyl tert-butyl ether <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Naphthalene <59.1 59.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 N-Propylbenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Styrene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,1,1,2-Tetrachloroethane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1

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Page 20 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-4E 0-1' Lab Sample ID: 310-68446-4 Date Collected: 11/04/15 11:05 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 89.9 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Tetrachloroethene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 6 Toluene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,2,3-Trichlorobenzene <59.1 59.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 7 1,2,4-Trichlorobenzene <59.1 59.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,1,1-Trichloroethane <11.8 * 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 8 1,1,2-Trichloroethane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Trichloroethene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Trichlorofluoromethane <47.3 47.3 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 9 1,2,3-Trichloropropane <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 1,2,4-Trimethylbenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 10 1,3,5-Trimethylbenzene <11.8 11.8 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 Vinyl chloride <35.5 35.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 11 Xylenes, Total <35.5 35.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:02 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 102 80 - 120 11/09/15 10:48 11/09/15 19:02 1 13 Dibromofluoromethane (Surr) 94 75 - 125 11/09/15 10:48 11/09/15 19:02 1 Toluene-d8 (Surr) 96 80 - 120 11/09/15 10:48 11/09/15 19:02 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Benzo[a]anthracene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Benzo[a]pyrene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Benzidine <36400 36400 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Benzo[b]fluoranthene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Benzo[g,h,i]perylene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Benzo[k]fluoranthene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Acenaphthene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Acenaphthylene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Benzyl alcohol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Butyl benzyl phthalate <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Bis(2-chloroethyl)ether <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Bis(2-chloroethoxy)methane <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Bis(2-ethylhexyl) phthalate <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 bis (2-chloroisopropyl) ether <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 4-Bromophenyl phenyl ether <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Carbazole <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 4-Chloroaniline <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2-Chloronaphthalene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 4-Chlorophenyl phenyl ether <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Chrysene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Dibenz(a,h)anthracene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Dibenzofuran <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Di-n-butyl phthalate <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 1,2-Dichlorobenzene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 1,3-Dichlorobenzene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 1,4-Dichlorobenzene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 3,3'-Dichlorobenzidine <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10

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Page 21 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-4E 0-1' Lab Sample ID: 310-68446-4 Date Collected: 11/04/15 11:05 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 89.9 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Dimethyl phthalate <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 6 2,4-Dinitrotoluene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2,6-Dinitrotoluene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 7 Fluorene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Hexachlorobenzene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 8 Hexachlorobutadiene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Hexachlorocyclopentadiene <7270 7270 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Hexachloroethane <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 9 Di-n-octyl phthalate <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Fluoranthene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 10 Indeno[1,2,3-cd]pyrene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Isophorone <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 11 2-Methylnaphthalene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Naphthalene <2200 2200 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 12 2-Nitroaniline <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 3-Nitroaniline <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 13 4-Nitroaniline <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Nitrobenzene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 14 N-Nitrosodiphenylamine <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 N-Nitrosodi-n-propylamine <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 15 N-Nitrosodimethylamine <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Phenanthrene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Pyrene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Pyridine <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 1,2,4-Trichlorobenzene <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Benzoic acid <7270 7270 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 4-Chloro-3-methylphenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2-Chlorophenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Total Cresols <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2,4-Dichlorophenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2,4-Dimethylphenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2,4-Dinitrophenol <7270 7270 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 4,6-Dinitro-2-methylphenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2-Methylphenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Methylphenol, 3 & 4 <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2-Nitrophenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 4-Nitrophenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Pentachlorophenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 Phenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2,4,5-Trichlorophenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10 2,4,6-Trichlorophenol <3640 3640 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:39 10

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 31 15 - 90 11/10/15 08:00 11/12/15 19:39 10 Phenol-d6 (Surr) 36 20 - 90 11/10/15 08:00 11/12/15 19:39 10 Nitrobenzene-d5 (Surr) 40 15 - 90 11/10/15 08:00 11/12/15 19:39 10 2-Fluorobiphenyl (Surr) 45 20 - 90 11/10/15 08:00 11/12/15 19:39 10 2,4,6-Tribromophenol (Surr) 46 25 - 105 11/10/15 08:00 11/12/15 19:39 10 Terphenyl-d14 (Surr) 51 35 - 110 11/10/15 08:00 11/12/15 19:39 10

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Page 22 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 3 Aldrin <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 alpha-BHC <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 4 beta-BHC <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 Chlordane (technical) <143 143 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 5 4,4'-DDD <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 4,4'-DDE <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 6 4,4'-DDT <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 delta-BHC <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 7 Dieldrin <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 Endosulfan I <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 8 Endosulfan II <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 Endosulfan sulfate <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 9 Endrin <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 Endrin aldehyde <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 10 gamma-BHC (Lindane) <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 Heptachlor <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 Heptachlor epoxide <36.2 36.2 ug/Kg ☼ 11/10/15 19:00 11/12/15 19:44 20 11 ☼ Toxaphene <356 356 ug/Kg 11/10/15 19:00 11/12/15 19:44 20 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 0 D 56 - 128 11/10/15 19:00 11/12/15 19:44 20 13 Tetrachloro-m-xylene 0 D 45 - 112 11/10/15 19:00 11/12/15 19:44 20 14 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0548 0.0548 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:10 1 15 PCB-1221 <0.0548 0.0548 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:10 1 PCB-1232 <0.0548 0.0548 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:10 1 PCB-1242 <0.0548 0.0548 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:10 1 PCB-1248 <0.0548 0.0548 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:10 1 PCB-1254 <0.0548 0.0548 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:10 1 PCB-1260 <0.0548 0.0548 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:10 1 PCB-1268 <0.0548 0.0548 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:10 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 84 40 - 120 11/09/15 09:54 11/10/15 16:10 1 Tetrachloro-m-xylene 68 10 - 105 11/09/15 09:54 11/10/15 16:10 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.87 9.87 mg/Kg 11/10/15 07:56 11/11/15 19:13 1 Gasoline <9.87 9.87 mg/Kg 11/10/15 07:56 11/11/15 19:13 1 Waste Oil <9.87 9.87 mg/Kg 11/10/15 07:56 11/11/15 19:13 1 Total Extractable Hydrocarbons 38.7 Z 14.8 mg/Kg 11/10/15 07:56 11/11/15 19:13 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 94 40 - 135 11/10/15 07:56 11/11/15 19:13 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony 9.59 4.97 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 Arsenic 10.0 3.98 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 Beryllium 0.521 0.497 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 Cadmium <0.994 0.994 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 Chromium 15.0 0.994 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1

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Page 23 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-4E 0-1' Lab Sample ID: 310-68446-4 Date Collected: 11/04/15 11:05 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 89.9 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Copper 29.2 0.994 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 Lead 86.1 4.97 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 6 Nickel 21.3 2.49 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 Selenium <7.46 7.46 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 7 Silver <0.994 0.994 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 Zinc 70.0 0.994 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:17 1 8 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 9 Thallium <1.05 1.05 mg/Kg ☼ 11/09/15 10:31 11/17/15 17:44 4 10 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Mercury 0.0362 0.0222 mg/Kg ☼ 11/11/15 10:29 11/12/15 11:14 1 12 13 14 15

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Page 24 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E 0.5-3' Lab Sample ID: 310-68446-5 3 Date Collected: 11/04/15 09:45 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 83.2 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <141 141 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Benzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 6 Bromobenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Bromochloromethane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 7 Bromodichloromethane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Bromoform <28.2 28.2 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 8 Bromomethane <56.4 56.4 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 2-Butanone (MEK) <141 141 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 9 n-Butylbenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 sec-Butylbenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 10 tert-Butylbenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Carbon disulfide <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Carbon tetrachloride <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 11 Chlorobenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Chlorodibromomethane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 12 Chloroethane <56.4 56.4 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Chloroform <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 13 Chloromethane <56.4 56.4 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 2-Chlorotoluene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 14 4-Chlorotoluene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,2-Dibromo-3-Chloropropane <141 141 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 15 1,2-Dibromoethane (EDB) <141 141 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Dibromomethane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,2-Dichlorobenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,3-Dichlorobenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,4-Dichlorobenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Dichlorodifluoromethane <42.3 42.3 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,1-Dichloroethane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,2-Dichloroethane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,1-Dichloroethene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 cis-1,2-Dichloroethene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 trans-1,2-Dichloroethene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,2-Dichloropropane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,3-Dichloropropane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 2,2-Dichloropropane <56.4 56.4 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,1-Dichloropropene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 cis-1,3-Dichloropropene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 trans-1,3-Dichloropropene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Ethylbenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Hexachlorobutadiene <70.5 70.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Hexane <70.5 70.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Isopropylbenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 p-Isopropyltoluene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Methylene Chloride <141 141 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Methyl tert-butyl ether <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Naphthalene <70.5 70.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 N-Propylbenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Styrene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,1,1,2-Tetrachloroethane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1

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Page 25 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E 0.5-3' Lab Sample ID: 310-68446-5 Date Collected: 11/04/15 09:45 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 83.2 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Tetrachloroethene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 6 Toluene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,2,3-Trichlorobenzene <70.5 70.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 7 1,2,4-Trichlorobenzene <70.5 70.5 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,1,1-Trichloroethane <14.1 * 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 8 1,1,2-Trichloroethane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Trichloroethene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Trichlorofluoromethane <56.4 56.4 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 9 1,2,3-Trichloropropane <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 1,2,4-Trimethylbenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 10 1,3,5-Trimethylbenzene <14.1 14.1 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 Vinyl chloride <42.3 42.3 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 11 Xylenes, Total <42.3 42.3 ug/Kg ☼ 11/09/15 10:48 11/09/15 19:26 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 97 80 - 120 11/09/15 10:48 11/09/15 19:26 1 13 Dibromofluoromethane (Surr) 93 75 - 125 11/09/15 10:48 11/09/15 19:26 1 Toluene-d8 (Surr) 98 80 - 120 11/09/15 10:48 11/09/15 19:26 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Benzo[a]anthracene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Benzo[a]pyrene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Benzidine <3870 3870 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Benzo[b]fluoranthene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Benzo[g,h,i]perylene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Benzo[k]fluoranthene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Acenaphthene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Acenaphthylene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Benzyl alcohol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Butyl benzyl phthalate <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Bis(2-chloroethyl)ether <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Bis(2-chloroethoxy)methane <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Bis(2-ethylhexyl) phthalate <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 bis (2-chloroisopropyl) ether <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 4-Bromophenyl phenyl ether <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Carbazole <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 4-Chloroaniline <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2-Chloronaphthalene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 4-Chlorophenyl phenyl ether <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Chrysene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Dibenz(a,h)anthracene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Dibenzofuran <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Di-n-butyl phthalate <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 1,2-Dichlorobenzene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 1,3-Dichlorobenzene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 1,4-Dichlorobenzene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 3,3'-Dichlorobenzidine <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1

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Page 26 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E 0.5-3' Lab Sample ID: 310-68446-5 Date Collected: 11/04/15 09:45 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 83.2 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Dimethyl phthalate <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 6 2,4-Dinitrotoluene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2,6-Dinitrotoluene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 7 Fluorene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Hexachlorobenzene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 8 Hexachlorobutadiene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Hexachlorocyclopentadiene <774 774 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Hexachloroethane <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 9 Di-n-octyl phthalate <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Fluoranthene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 10 Indeno[1,2,3-cd]pyrene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Isophorone <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 11 2-Methylnaphthalene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Naphthalene <235 235 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 12 2-Nitroaniline <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 3-Nitroaniline <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 13 4-Nitroaniline <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Nitrobenzene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 14 N-Nitrosodiphenylamine <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 N-Nitrosodi-n-propylamine <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 15 N-Nitrosodimethylamine <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Phenanthrene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Pyrene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Pyridine <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 1,2,4-Trichlorobenzene <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Benzoic acid <774 774 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 4-Chloro-3-methylphenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2-Chlorophenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Total Cresols <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2,4-Dichlorophenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2,4-Dimethylphenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2,4-Dinitrophenol <774 774 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 4,6-Dinitro-2-methylphenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2-Methylphenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Methylphenol, 3 & 4 <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2-Nitrophenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 4-Nitrophenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Pentachlorophenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 Phenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2,4,5-Trichlorophenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1 2,4,6-Trichlorophenol <387 387 ug/Kg ☼ 11/10/15 08:00 11/12/15 20:04 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 32 15 - 90 11/10/15 08:00 11/12/15 20:04 1 Phenol-d6 (Surr) 37 20 - 90 11/10/15 08:00 11/12/15 20:04 1 Nitrobenzene-d5 (Surr) 41 15 - 90 11/10/15 08:00 11/12/15 20:04 1 2-Fluorobiphenyl (Surr) 42 20 - 90 11/10/15 08:00 11/12/15 20:04 1 2,4,6-Tribromophenol (Surr) 42 25 - 105 11/10/15 08:00 11/12/15 20:04 1 Terphenyl-d14 (Surr) 52 35 - 110 11/10/15 08:00 11/12/15 20:04 1

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Page 27 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 3 Aldrin <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 alpha-BHC <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 4 beta-BHC <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 Chlordane (technical) <7.94 7.94 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 5 4,4'-DDD <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 4,4'-DDE <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 6 4,4'-DDT <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 delta-BHC <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 7 Dieldrin <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 Endosulfan I <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 8 Endosulfan II <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 Endosulfan sulfate <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 9 Endrin <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 Endrin aldehyde <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 10 gamma-BHC (Lindane) <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 Heptachlor <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 Heptachlor epoxide <2.01 2.01 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:25 1 11 ☼ Toxaphene <19.8 19.8 ug/Kg 11/10/15 19:00 11/12/15 20:25 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 103 56 - 128 11/10/15 19:00 11/12/15 20:25 1 13 Tetrachloro-m-xylene 84 45 - 112 11/10/15 19:00 11/12/15 20:25 1 14 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0583 0.0583 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:21 1 15 PCB-1221 <0.0583 0.0583 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:21 1 PCB-1232 <0.0583 0.0583 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:21 1 PCB-1242 <0.0583 0.0583 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:21 1 PCB-1248 <0.0583 0.0583 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:21 1 PCB-1254 <0.0583 0.0583 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:21 1 PCB-1260 <0.0583 0.0583 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:21 1 PCB-1268 <0.0583 0.0583 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:21 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 71 40 - 120 11/09/15 09:54 11/10/15 16:21 1 Tetrachloro-m-xylene 65 10 - 105 11/09/15 09:54 11/10/15 16:21 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.71 9.71 mg/Kg 11/10/15 07:56 11/11/15 19:27 1 Gasoline <9.71 9.71 mg/Kg 11/10/15 07:56 11/11/15 19:27 1 Waste Oil 90.3 9.71 mg/Kg 11/10/15 07:56 11/11/15 19:27 1 Total Extractable Hydrocarbons 95.3 14.6 mg/Kg 11/10/15 07:56 11/11/15 19:27 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 92 40 - 135 11/10/15 07:56 11/11/15 19:27 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <5.67 5.67 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 Arsenic 10.9 4.54 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 Beryllium <0.567 0.567 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 Cadmium <1.13 1.13 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 Chromium 16.5 1.13 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1

TestAmerica Cedar Falls

Page 28 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E 0.5-3' Lab Sample ID: 310-68446-5 Date Collected: 11/04/15 09:45 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 83.2 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Copper 17.7 1.13 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 Lead 11.7 5.67 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 6 Nickel 25.9 2.84 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 Selenium <8.51 8.51 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 7 Silver <1.13 1.13 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 Zinc 63.0 1.13 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:19 1 8 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 9 Thallium <0.922 0.922 mg/Kg ☼ 11/09/15 10:31 11/17/15 17:48 4 10 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Mercury 0.0223 0.0209 mg/Kg ☼ 11/11/15 10:29 11/12/15 11:15 1 12 13 14 15

TestAmerica Cedar Falls

Page 29 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-6E 0-1.4' Lab Sample ID: 310-68446-6 3 Date Collected: 11/04/15 08:35 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 87.1 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <565 565 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Benzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 6 Bromobenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Bromochloromethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 7 Bromodichloromethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Bromoform <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 8 Bromomethane <565 565 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 2-Butanone (MEK) <282 282 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 9 n-Butylbenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 sec-Butylbenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 10 tert-Butylbenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Carbon disulfide <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Carbon tetrachloride <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 11 Chlorobenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Chlorodibromomethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 12 Chloroethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Chloroform <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 13 Chloromethane <282 282 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 2-Chlorotoluene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 14 4-Chlorotoluene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,2-Dibromo-3-Chloropropane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 15 1,2-Dibromoethane (EDB) <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Dibromomethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,2-Dichlorobenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,3-Dichlorobenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,4-Dichlorobenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Dichlorodifluoromethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,1-Dichloroethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,2-Dichloroethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,1-Dichloroethene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 cis-1,2-Dichloroethene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 trans-1,2-Dichloroethene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,2-Dichloropropane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,3-Dichloropropane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 2,2-Dichloropropane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,1-Dichloropropene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 cis-1,3-Dichloropropene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 trans-1,3-Dichloropropene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Ethylbenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Hexachlorobutadiene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Hexane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Isopropylbenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 p-Isopropyltoluene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Methylene Chloride <282 282 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Methyl tert-butyl ether <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Naphthalene <282 282 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 N-Propylbenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Styrene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,1,1,2-Tetrachloroethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1

TestAmerica Cedar Falls

Page 30 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-6E 0-1.4' Lab Sample ID: 310-68446-6 Date Collected: 11/04/15 08:35 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 87.1 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Tetrachloroethene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 6 Toluene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,2,3-Trichlorobenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 7 1,2,4-Trichlorobenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,1,1-Trichloroethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 8 1,1,2-Trichloroethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Trichloroethene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Trichlorofluoromethane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 9 1,2,3-Trichloropropane <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 1,2,4-Trimethylbenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 10 1,3,5-Trimethylbenzene <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 Vinyl chloride <113 113 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 11 Xylenes, Total <169 169 ug/Kg ☼ 11/17/15 07:37 11/17/15 17:27 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 97 80 - 120 11/17/15 07:37 11/17/15 17:27 1 13 Dibromofluoromethane (Surr) 93 75 - 125 11/17/15 07:37 11/17/15 17:27 1 Toluene-d8 (Surr) 98 80 - 120 11/17/15 07:37 11/17/15 17:27 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Benzo[a]anthracene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Benzo[a]pyrene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Benzidine <373000 373000 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Benzo[b]fluoranthene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Benzo[g,h,i]perylene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Benzo[k]fluoranthene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Acenaphthene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Acenaphthylene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Benzyl alcohol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Butyl benzyl phthalate <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Bis(2-chloroethyl)ether <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Bis(2-chloroethoxy)methane <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Bis(2-ethylhexyl) phthalate <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 bis (2-chloroisopropyl) ether <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 4-Bromophenyl phenyl ether <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Carbazole <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 4-Chloroaniline <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2-Chloronaphthalene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 4-Chlorophenyl phenyl ether <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Chrysene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Dibenz(a,h)anthracene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Dibenzofuran <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Di-n-butyl phthalate <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 1,2-Dichlorobenzene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 1,3-Dichlorobenzene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 1,4-Dichlorobenzene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 3,3'-Dichlorobenzidine <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100

TestAmerica Cedar Falls

Page 31 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-6E 0-1.4' Lab Sample ID: 310-68446-6 Date Collected: 11/04/15 08:35 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 87.1 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Dimethyl phthalate <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 6 2,4-Dinitrotoluene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2,6-Dinitrotoluene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 7 Fluorene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Hexachlorobenzene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 8 Hexachlorobutadiene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Hexachlorocyclopentadiene <74500 74500 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Hexachloroethane <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 9 Di-n-octyl phthalate <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Fluoranthene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 10 Indeno[1,2,3-cd]pyrene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Isophorone <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 11 2-Methylnaphthalene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Naphthalene <22600 22600 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 12 2-Nitroaniline <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 3-Nitroaniline <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 13 4-Nitroaniline <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Nitrobenzene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 14 N-Nitrosodiphenylamine <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 N-Nitrosodi-n-propylamine <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 15 N-Nitrosodimethylamine <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Phenanthrene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Pyrene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Pyridine <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 1,2,4-Trichlorobenzene <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Benzoic acid <74500 74500 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 4-Chloro-3-methylphenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2-Chlorophenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Total Cresols <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2,4-Dichlorophenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2,4-Dimethylphenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2,4-Dinitrophenol <74500 74500 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 4,6-Dinitro-2-methylphenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2-Methylphenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Methylphenol, 3 & 4 <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2-Nitrophenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 4-Nitrophenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Pentachlorophenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 Phenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2,4,5-Trichlorophenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100 2,4,6-Trichlorophenol <37300 37300 ug/Kg ☼ 11/10/15 08:00 11/12/15 19:15 100

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 13 X 15 - 90 11/10/15 08:00 11/12/15 19:15 100 Phenol-d6 (Surr) 15 X 20 - 90 11/10/15 08:00 11/12/15 19:15 100 Nitrobenzene-d5 (Surr) 21 15 - 90 11/10/15 08:00 11/12/15 19:15 100 2-Fluorobiphenyl (Surr) 34 20 - 90 11/10/15 08:00 11/12/15 19:15 100 2,4,6-Tribromophenol (Surr) 14 X 25 - 105 11/10/15 08:00 11/12/15 19:15 100 Terphenyl-d14 (Surr) 34 X 35 - 110 11/10/15 08:00 11/12/15 19:15 100

TestAmerica Cedar Falls

Page 32 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 3 Aldrin <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 alpha-BHC <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 4 beta-BHC <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 Chlordane (technical) <152 152 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 5 4,4'-DDD <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 4,4'-DDE <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 6 4,4'-DDT <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 delta-BHC <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 7 Dieldrin <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 Endosulfan I <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 8 Endosulfan II <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 Endosulfan sulfate <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 9 Endrin <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 Endrin aldehyde <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 10 gamma-BHC (Lindane) <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 Heptachlor <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 Heptachlor epoxide <38.6 38.6 ug/Kg ☼ 11/10/15 19:00 11/12/15 20:46 20 11 ☼ Toxaphene <380 380 ug/Kg 11/10/15 19:00 11/12/15 20:46 20 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 0 D 56 - 128 11/10/15 19:00 11/12/15 20:46 20 13 Tetrachloro-m-xylene 0 D 45 - 112 11/10/15 19:00 11/12/15 20:46 20 14 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0568 0.0568 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:33 1 15 PCB-1221 <0.0568 0.0568 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:33 1 PCB-1232 <0.0568 0.0568 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:33 1 PCB-1242 <0.0568 0.0568 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:33 1 PCB-1248 <0.0568 0.0568 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:33 1 PCB-1254 <0.0568 0.0568 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:33 1 PCB-1260 <0.0568 0.0568 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:33 1 PCB-1268 <0.0568 0.0568 mg/Kg ☼ 11/09/15 09:54 11/10/15 16:33 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 43 40 - 120 11/09/15 09:54 11/10/15 16:33 1 Tetrachloro-m-xylene 40 10 - 105 11/09/15 09:54 11/10/15 16:33 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <9.90 9.90 mg/Kg 11/10/15 07:56 11/11/15 20:09 1 Gasoline <9.90 9.90 mg/Kg 11/10/15 07:56 11/11/15 20:09 1 Waste Oil 762 9.90 mg/Kg 11/10/15 07:56 11/11/15 20:09 1 Total Extractable Hydrocarbons 875 14.9 mg/Kg 11/10/15 07:56 11/11/15 20:09 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 209 X 40 - 135 11/10/15 07:56 11/11/15 20:09 1

Method: 6010C - Metals (ICP) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <11.1 11.1 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 Arsenic 18.2 8.87 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 Beryllium <1.11 1.11 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 Cadmium <2.22 2.22 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 Chromium 25.6 2.22 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2

TestAmerica Cedar Falls

Page 33 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-6E 0-1.4' Lab Sample ID: 310-68446-6 Date Collected: 11/04/15 08:35 Matrix: Soil 3 Date Received: 11/06/15 10:00 Percent Solids: 87.1 4 Method: 6010C - Metals (ICP) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Copper 103 2.22 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 Lead 361 11.1 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 6 Nickel 19.6 5.54 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 Selenium <16.6 16.6 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 7 Silver <2.22 2.22 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 Zinc 391 2.22 mg/Kg ☼ 11/09/15 10:18 11/09/15 19:47 2 8 Method: 7010 - Metals (GFAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 9 Thallium <1.14 1.14 mg/Kg ☼ 11/09/15 10:31 11/17/15 17:52 4 10 Method: 7471B - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 11 Mercury 0.474 0.0222 mg/Kg ☼ 11/11/15 10:29 11/12/15 11:17 1 12 13 14 15

TestAmerica Cedar Falls

Page 34 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E Lab Sample ID: 310-68446-7 3 Date Collected: 11/05/15 08:55 Matrix: Ground Water Date Received: 11/06/15 10:00 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <10.0 10.0 ug/L 11/16/15 10:57 1 Benzene <0.500 0.500 ug/L 11/16/15 10:57 1 6 Bromobenzene <1.00 1.00 ug/L 11/16/15 10:57 1 Bromochloromethane <5.00 5.00 ug/L 11/16/15 10:57 1 7 Bromodichloromethane <1.00 1.00 ug/L 11/16/15 10:57 1 Bromoform <5.00 5.00 ug/L 11/16/15 10:57 1 8 Bromomethane <4.00 4.00 ug/L 11/16/15 10:57 1 2-Butanone (MEK) <10.0 10.0 ug/L 11/16/15 10:57 1 9 n-Butylbenzene <1.00 1.00 ug/L 11/16/15 10:57 1 sec-Butylbenzene <1.00 1.00 ug/L 11/16/15 10:57 1 10 tert-Butylbenzene <1.00 1.00 ug/L 11/16/15 10:57 1 Carbon disulfide <1.00 1.00 ug/L 11/16/15 10:57 1 Carbon tetrachloride <2.00 2.00 ug/L 11/16/15 10:57 1 11 Chlorobenzene <1.00 1.00 ug/L 11/16/15 10:57 1 Chlorodibromomethane <5.00 5.00 ug/L 11/16/15 10:57 1 12 Chloroethane <4.00 4.00 ug/L 11/16/15 10:57 1 Chloroform <1.00 1.00 ug/L 11/16/15 10:57 1 13 Chloromethane <3.00 3.00 ug/L 11/16/15 10:57 1 2-Chlorotoluene <1.00 1.00 ug/L 11/16/15 10:57 1 14 4-Chlorotoluene <1.00 1.00 ug/L 11/16/15 10:57 1 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/16/15 10:57 1 15 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/16/15 10:57 1 Dibromomethane <1.00 1.00 ug/L 11/16/15 10:57 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/16/15 10:57 1 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/16/15 10:57 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/16/15 10:57 1 Dichlorodifluoromethane <3.00 3.00 ug/L 11/16/15 10:57 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/16/15 10:57 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/16/15 10:57 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/16/15 10:57 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/16/15 10:57 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/16/15 10:57 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/16/15 10:57 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/16/15 10:57 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/16/15 10:57 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/16/15 10:57 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/16/15 10:57 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/16/15 10:57 1 Ethylbenzene <1.00 1.00 ug/L 11/16/15 10:57 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/16/15 10:57 1 Hexane <1.00 1.00 ug/L 11/16/15 10:57 1 Isopropylbenzene <1.00 1.00 ug/L 11/16/15 10:57 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/16/15 10:57 1 Methylene Chloride <5.00 5.00 ug/L 11/16/15 10:57 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/16/15 10:57 1 Naphthalene <5.00 5.00 ug/L 11/16/15 10:57 1 N-Propylbenzene <1.00 1.00 ug/L 11/16/15 10:57 1 Styrene <1.00 F1 1.00 ug/L 11/16/15 10:57 1 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/16/15 10:57 1

TestAmerica Cedar Falls

Page 35 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E Lab Sample ID: 310-68446-7 Date Collected: 11/05/15 08:55 Matrix: Ground Water 3 Date Received: 11/06/15 10:00 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/16/15 10:57 1 Tetrachloroethene <1.00 1.00 ug/L 11/16/15 10:57 1 6 Toluene <1.00 1.00 ug/L 11/16/15 10:57 1 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/16/15 10:57 1 7 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/16/15 10:57 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/16/15 10:57 1 8 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/16/15 10:57 1 Trichloroethene <1.00 1.00 ug/L 11/16/15 10:57 1 Trichlorofluoromethane <4.00 4.00 ug/L 11/16/15 10:57 1 9 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/16/15 10:57 1 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/16/15 10:57 1 10 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/16/15 10:57 1 Vinyl chloride <1.00 1.00 ug/L 11/16/15 10:57 1 11 Xylenes, Total <3.00 3.00 ug/L 11/16/15 10:57 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 100 75 - 120 11/16/15 10:57 1 13 Dibromofluoromethane (Surr) 105 75 - 120 11/16/15 10:57 1 Toluene-d8 (Surr) 98 80 - 120 11/16/15 10:57 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Benzo[a]anthracene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Benzo[a]pyrene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Benzidine <110 110 ug/L 11/11/15 14:30 11/16/15 14:06 1 Benzo[b]fluoranthene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Benzo[g,h,i]perylene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Benzo[k]fluoranthene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Acenaphthene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Acenaphthylene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Benzyl alcohol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Butyl benzyl phthalate <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Bis(2-chloroethyl)ether <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Bis(2-chloroethoxy)methane <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Bis(2-ethylhexyl) phthalate <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 bis (2-chloroisopropyl) ether <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 4-Bromophenyl phenyl ether <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Carbazole <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 4-Chloroaniline <11.0 * 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2-Chloronaphthalene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 4-Chlorophenyl phenyl ether <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Chrysene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Dibenz(a,h)anthracene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Dibenzofuran <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Di-n-butyl phthalate <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 1,2-Dichlorobenzene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 1,3-Dichlorobenzene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 1,4-Dichlorobenzene <11.0 * 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 3,3'-Dichlorobenzidine <54.9 54.9 ug/L 11/11/15 14:30 11/16/15 14:06 1

TestAmerica Cedar Falls

Page 36 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E Lab Sample ID: 310-68446-7 Date Collected: 11/05/15 08:55 Matrix: Ground Water 3 Date Received: 11/06/15 10:00 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Dimethyl phthalate <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 6 2,4-Dinitrotoluene <11.0 * 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2,6-Dinitrotoluene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 7 Fluorene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Hexachlorobenzene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 8 Hexachlorobutadiene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Hexachlorocyclopentadiene <22.0 22.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Hexachloroethane <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 9 Di-n-octyl phthalate <22.0 22.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Fluoranthene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 10 Indeno[1,2,3-cd]pyrene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Isophorone <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 11 2-Methylnaphthalene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Naphthalene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 12 2-Nitroaniline <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 3-Nitroaniline <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 13 4-Nitroaniline <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Nitrobenzene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 14 N-Nitrosodiphenylamine <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 N-Nitrosodi-n-propylamine <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 15 N-Nitrosodimethylamine <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Phenanthrene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Pyrene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Pyridine <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 1,2,4-Trichlorobenzene <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Benzoic acid <110 110 ug/L 11/11/15 14:30 11/16/15 14:06 1 4-Chloro-3-methylphenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2-Chlorophenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Total Cresols <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2,4-Dichlorophenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2,4-Dimethylphenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2,4-Dinitrophenol <22.0 22.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 4,6-Dinitro-2-methylphenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2-Methylphenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Methylphenol, 3 & 4 <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2-Nitrophenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 4-Nitrophenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Pentachlorophenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 Phenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2,4,5-Trichlorophenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1 2,4,6-Trichlorophenol <11.0 11.0 ug/L 11/11/15 14:30 11/16/15 14:06 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 31 15 - 50 11/11/15 14:30 11/16/15 14:06 1 Phenol-d6 (Surr) 22 10 - 35 11/11/15 14:30 11/16/15 14:06 1 Nitrobenzene-d5 (Surr) 61 25 - 80 11/11/15 14:30 11/16/15 14:06 1 2-Fluorobiphenyl (Surr) 59 25 - 80 11/11/15 14:30 11/16/15 14:06 1 2,4,6-Tribromophenol (Surr) 60 25 - 100 11/11/15 14:30 11/16/15 14:06 1 Terphenyl-d14 (Surr) 77 30 - 105 11/11/15 14:30 11/16/15 14:06 1

TestAmerica Cedar Falls

Page 37 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 3 Aldrin <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 alpha-BHC <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 4 beta-BHC <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 Chlordane (technical) <2.22 2.22 ug/L 11/10/15 09:46 11/11/15 16:19 1 5 4,4'-DDD <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 4,4'-DDE <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 6 4,4'-DDT <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 delta-BHC <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 7 Dieldrin <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 Endosulfan I <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 8 Endosulfan II <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 Endosulfan sulfate <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 9 Endrin <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 Endrin aldehyde <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 10 gamma-BHC (Lindane) <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 Heptachlor <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 Heptachlor epoxide <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 11 Methoxychlor <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:19 1 Toxaphene <2.22 2.22 ug/L 11/10/15 09:46 11/11/15 16:19 1 12

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13 DCB Decachlorobiphenyl (Surr) 27 X 30 - 125 11/10/15 09:46 11/11/15 16:19 1 Tetrachloro-m-xylene 38 15 - 115 11/10/15 09:46 11/11/15 16:19 1 14 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 PCB-1016 <0.879 0.879 ug/L 11/10/15 09:48 11/11/15 16:01 1 PCB-1221 <0.879 0.879 ug/L 11/10/15 09:48 11/11/15 16:01 1 PCB-1232 <0.879 0.879 ug/L 11/10/15 09:48 11/11/15 16:01 1 PCB-1242 <0.879 0.879 ug/L 11/10/15 09:48 11/11/15 16:01 1 PCB-1248 <0.879 0.879 ug/L 11/10/15 09:48 11/11/15 16:01 1 PCB-1254 <0.879 0.879 ug/L 11/10/15 09:48 11/11/15 16:01 1 PCB-1260 <0.879 0.879 ug/L 11/10/15 09:48 11/11/15 16:01 1 PCB-1268 <0.879 0.879 ug/L 11/10/15 09:48 11/11/15 16:01 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 54 25 - 115 11/10/15 09:48 11/11/15 16:01 1 Tetrachloro-m-xylene 71 20 - 90 11/10/15 09:48 11/11/15 16:01 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <300 * 300 ug/L 11/11/15 14:26 11/13/15 23:14 1 Gasoline <300 300 ug/L 11/11/15 14:26 11/13/15 23:14 1 Waste Oil <300 300 ug/L 11/11/15 14:26 11/13/15 23:14 1 Total Extractable Hydrocarbons <500 500 ug/L 11/11/15 14:26 11/13/15 23:14 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 95 45 - 140 11/11/15 14:26 11/13/15 23:14 1

Method: 6020A - Metals (ICP/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony 0.00108 0.00100 mg/L 11/10/15 18:21 11/11/15 14:33 1 Arsenic 0.00880 0.00200 mg/L 11/10/15 18:21 11/11/15 14:33 1 Beryllium <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:33 1 Cadmium 0.00243 0.000500 mg/L 11/10/15 18:21 11/11/15 14:33 1

TestAmerica Cedar Falls

Page 38 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E Lab Sample ID: 310-68446-7 Date Collected: 11/05/15 08:55 Matrix: Ground Water 3 Date Received: 11/06/15 10:00 4 Method: 6020A - Metals (ICP/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Chromium 0.0250 0.00500 mg/L 11/10/15 18:21 11/11/15 14:33 1 Copper 0.0954 0.00200 mg/L 11/10/15 18:21 11/11/15 14:33 1 6 Lead 0.0990 0.000500 mg/L 11/10/15 18:21 11/11/15 14:33 1 Nickel 0.0321 0.00500 mg/L 11/10/15 18:21 11/11/15 14:33 1 7 Selenium 0.00699 0.00500 mg/L 11/10/15 18:21 11/11/15 14:33 1 Silver <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:33 1 8 Thallium <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:33 1 Zinc 0.0390 0.0100 mg/L 11/10/15 18:21 11/11/15 14:33 1 9 Method: 7470A - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 10 Mercury <0.000200 0.000200 mg/L 11/10/15 13:12 11/11/15 10:50 1 11 12 13 14 15

TestAmerica Cedar Falls

Page 39 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-4E Lab Sample ID: 310-68446-8 3 Date Collected: 11/05/15 11:00 Matrix: Ground Water Date Received: 11/06/15 10:00 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <10.0 10.0 ug/L 11/14/15 08:51 1 Benzene <0.500 0.500 ug/L 11/14/15 08:51 1 6 Bromobenzene <1.00 1.00 ug/L 11/14/15 08:51 1 Bromochloromethane <5.00 5.00 ug/L 11/14/15 08:51 1 7 Bromodichloromethane <1.00 1.00 ug/L 11/14/15 08:51 1 Bromoform <5.00 5.00 ug/L 11/14/15 08:51 1 8 Bromomethane <4.00 4.00 ug/L 11/14/15 08:51 1 2-Butanone (MEK) <10.0 10.0 ug/L 11/14/15 08:51 1 9 n-Butylbenzene <1.00 1.00 ug/L 11/14/15 08:51 1 sec-Butylbenzene <1.00 1.00 ug/L 11/14/15 08:51 1 10 tert-Butylbenzene <1.00 1.00 ug/L 11/14/15 08:51 1 Carbon disulfide <1.00 1.00 ug/L 11/14/15 08:51 1 Carbon tetrachloride <2.00 2.00 ug/L 11/14/15 08:51 1 11 Chlorobenzene <1.00 1.00 ug/L 11/14/15 08:51 1 Chlorodibromomethane <5.00 5.00 ug/L 11/14/15 08:51 1 12 Chloroethane <4.00 4.00 ug/L 11/14/15 08:51 1 Chloroform <1.00 1.00 ug/L 11/14/15 08:51 1 13 Chloromethane <3.00 3.00 ug/L 11/14/15 08:51 1 2-Chlorotoluene <1.00 1.00 ug/L 11/14/15 08:51 1 14 4-Chlorotoluene <1.00 1.00 ug/L 11/14/15 08:51 1 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/14/15 08:51 1 15 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/14/15 08:51 1 Dibromomethane <1.00 1.00 ug/L 11/14/15 08:51 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 08:51 1 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 08:51 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 08:51 1 Dichlorodifluoromethane <3.00 ^ 3.00 ug/L 11/14/15 08:51 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/14/15 08:51 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/14/15 08:51 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/14/15 08:51 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/14/15 08:51 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/14/15 08:51 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/14/15 08:51 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/14/15 08:51 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/14/15 08:51 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/14/15 08:51 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/14/15 08:51 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/14/15 08:51 1 Ethylbenzene <1.00 1.00 ug/L 11/14/15 08:51 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/14/15 08:51 1 Hexane <1.00 1.00 ug/L 11/14/15 08:51 1 Isopropylbenzene <1.00 1.00 ug/L 11/14/15 08:51 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/14/15 08:51 1 Methylene Chloride <5.00 5.00 ug/L 11/14/15 08:51 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/14/15 08:51 1 Naphthalene <5.00 5.00 ug/L 11/14/15 08:51 1 N-Propylbenzene <1.00 1.00 ug/L 11/14/15 08:51 1 Styrene <1.00 1.00 ug/L 11/14/15 08:51 1 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/14/15 08:51 1

TestAmerica Cedar Falls

Page 40 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-4E Lab Sample ID: 310-68446-8 Date Collected: 11/05/15 11:00 Matrix: Ground Water 3 Date Received: 11/06/15 10:00 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/14/15 08:51 1 Tetrachloroethene <1.00 1.00 ug/L 11/14/15 08:51 1 6 Toluene <1.00 1.00 ug/L 11/14/15 08:51 1 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/14/15 08:51 1 7 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/14/15 08:51 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/14/15 08:51 1 8 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/14/15 08:51 1 Trichloroethene <1.00 1.00 ug/L 11/14/15 08:51 1 Trichlorofluoromethane <4.00 4.00 ug/L 11/14/15 08:51 1 9 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/14/15 08:51 1 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/14/15 08:51 1 10 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/14/15 08:51 1 Vinyl chloride <1.00 1.00 ug/L 11/14/15 08:51 1 11 Xylenes, Total <3.00 3.00 ug/L 11/14/15 08:51 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 96 75 - 120 11/14/15 08:51 1 13 Dibromofluoromethane (Surr) 102 75 - 120 11/14/15 08:51 1 Toluene-d8 (Surr) 99 80 - 120 11/14/15 08:51 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Benzo[a]anthracene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Benzo[a]pyrene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Benzidine <108 108 ug/L 11/11/15 14:30 11/16/15 16:55 1 Benzo[b]fluoranthene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Benzo[g,h,i]perylene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Benzo[k]fluoranthene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Acenaphthene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Acenaphthylene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Benzyl alcohol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Butyl benzyl phthalate <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Bis(2-chloroethyl)ether <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Bis(2-chloroethoxy)methane <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Bis(2-ethylhexyl) phthalate <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 bis (2-chloroisopropyl) ether <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 4-Bromophenyl phenyl ether <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Carbazole <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 4-Chloroaniline <10.8 * 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2-Chloronaphthalene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 4-Chlorophenyl phenyl ether <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Chrysene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Dibenz(a,h)anthracene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Dibenzofuran <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Di-n-butyl phthalate <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 1,2-Dichlorobenzene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 1,3-Dichlorobenzene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 1,4-Dichlorobenzene <10.8 * 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 3,3'-Dichlorobenzidine <53.8 53.8 ug/L 11/11/15 14:30 11/16/15 16:55 1

TestAmerica Cedar Falls

Page 41 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-4E Lab Sample ID: 310-68446-8 Date Collected: 11/05/15 11:00 Matrix: Ground Water 3 Date Received: 11/06/15 10:00 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Dimethyl phthalate <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 6 2,4-Dinitrotoluene <10.8 * 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2,6-Dinitrotoluene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 7 Fluorene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Hexachlorobenzene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 8 Hexachlorobutadiene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Hexachlorocyclopentadiene <21.5 21.5 ug/L 11/11/15 14:30 11/16/15 16:55 1 Hexachloroethane <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 9 Di-n-octyl phthalate <21.5 21.5 ug/L 11/11/15 14:30 11/16/15 16:55 1 Fluoranthene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 10 Indeno[1,2,3-cd]pyrene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Isophorone <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 11 2-Methylnaphthalene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Naphthalene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 12 2-Nitroaniline <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 3-Nitroaniline <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 13 4-Nitroaniline <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Nitrobenzene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 14 N-Nitrosodiphenylamine <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 N-Nitrosodi-n-propylamine <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 15 N-Nitrosodimethylamine <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Phenanthrene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Pyrene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Pyridine <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 1,2,4-Trichlorobenzene <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Benzoic acid <108 108 ug/L 11/11/15 14:30 11/16/15 16:55 1 4-Chloro-3-methylphenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2-Chlorophenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Total Cresols <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2,4-Dichlorophenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2,4-Dimethylphenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2,4-Dinitrophenol <21.5 21.5 ug/L 11/11/15 14:30 11/16/15 16:55 1 4,6-Dinitro-2-methylphenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2-Methylphenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Methylphenol, 3 & 4 <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2-Nitrophenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 4-Nitrophenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Pentachlorophenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 Phenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2,4,5-Trichlorophenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1 2,4,6-Trichlorophenol <10.8 10.8 ug/L 11/11/15 14:30 11/16/15 16:55 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 27 15 - 50 11/11/15 14:30 11/16/15 16:55 1 Phenol-d6 (Surr) 21 10 - 35 11/11/15 14:30 11/16/15 16:55 1 Nitrobenzene-d5 (Surr) 53 25 - 80 11/11/15 14:30 11/16/15 16:55 1 2-Fluorobiphenyl (Surr) 49 25 - 80 11/11/15 14:30 11/16/15 16:55 1 2,4,6-Tribromophenol (Surr) 63 25 - 100 11/11/15 14:30 11/16/15 16:55 1 Terphenyl-d14 (Surr) 72 30 - 105 11/11/15 14:30 11/16/15 16:55 1

TestAmerica Cedar Falls

Page 42 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 3 Aldrin <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 alpha-BHC <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 4 beta-BHC <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 Chlordane (technical) <2.04 2.04 ug/L 11/10/15 09:46 11/12/15 12:09 1 5 4,4'-DDD <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 4,4'-DDE <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 6 4,4'-DDT <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 delta-BHC <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 7 Dieldrin <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 Endosulfan I <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 8 Endosulfan II <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 Endosulfan sulfate <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 9 Endrin <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 Endrin aldehyde <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 10 gamma-BHC (Lindane) <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 Heptachlor <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 Heptachlor epoxide <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 11 Methoxychlor <0.0327 0.0327 ug/L 11/10/15 09:46 11/12/15 12:09 1 Toxaphene <2.04 2.04 ug/L 11/10/15 09:46 11/12/15 12:09 1 12

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13 DCB Decachlorobiphenyl (Surr) 26 X 30 - 125 11/10/15 09:46 11/12/15 12:09 1 Tetrachloro-m-xylene 37 15 - 115 11/10/15 09:46 11/12/15 12:09 1 14 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 PCB-1016 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:12 1 PCB-1221 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:12 1 PCB-1232 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:12 1 PCB-1242 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:12 1 PCB-1248 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:12 1 PCB-1254 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:12 1 PCB-1260 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:12 1 PCB-1268 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:12 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 44 25 - 115 11/10/15 09:48 11/11/15 16:12 1 Tetrachloro-m-xylene 70 20 - 90 11/10/15 09:48 11/11/15 16:12 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <300 * 300 ug/L 11/11/15 14:26 11/13/15 23:29 1 Gasoline <300 300 ug/L 11/11/15 14:26 11/13/15 23:29 1 Waste Oil <300 300 ug/L 11/11/15 14:26 11/13/15 23:29 1 Total Extractable Hydrocarbons <500 500 ug/L 11/11/15 14:26 11/13/15 23:29 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 93 45 - 140 11/11/15 14:26 11/13/15 23:29 1

Method: 6020A - Metals (ICP/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:36 1 Arsenic 0.00790 0.00200 mg/L 11/10/15 18:21 11/11/15 14:36 1 Beryllium <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:36 1 Cadmium 0.00622 0.000500 mg/L 11/10/15 18:21 11/11/15 14:36 1

TestAmerica Cedar Falls

Page 43 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-4E Lab Sample ID: 310-68446-8 Date Collected: 11/05/15 11:00 Matrix: Ground Water 3 Date Received: 11/06/15 10:00 4 Method: 6020A - Metals (ICP/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Chromium 0.0282 0.00500 mg/L 11/10/15 18:21 11/11/15 14:36 1 Copper 0.0285 0.00200 mg/L 11/10/15 18:21 11/11/15 14:36 1 6 Lead 0.0370 0.000500 mg/L 11/10/15 18:21 11/11/15 14:36 1 Nickel 0.0530 0.00500 mg/L 11/10/15 18:21 11/11/15 14:36 1 7 Selenium 0.0146 0.00500 mg/L 11/10/15 18:21 11/11/15 14:36 1 Silver <0.00300 0.00300 mg/L 11/10/15 18:21 11/11/15 15:19 3 8 Thallium <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:36 1 Zinc 0.0357 0.0100 mg/L 11/10/15 18:21 11/11/15 14:36 1 9 Method: 7470A - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 10 Mercury 0.000644 0.000200 mg/L 11/10/15 13:12 11/11/15 10:51 1 11 12 13 14 15

TestAmerica Cedar Falls

Page 44 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E Lab Sample ID: 310-68446-9 3 Date Collected: 11/05/15 13:10 Matrix: Ground Water Date Received: 11/06/15 10:00 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <10.0 10.0 ug/L 11/14/15 08:26 1 Benzene <0.500 0.500 ug/L 11/14/15 08:26 1 6 Bromobenzene <1.00 1.00 ug/L 11/14/15 08:26 1 Bromochloromethane <5.00 5.00 ug/L 11/14/15 08:26 1 7 Bromodichloromethane <1.00 1.00 ug/L 11/14/15 08:26 1 Bromoform <5.00 5.00 ug/L 11/14/15 08:26 1 8 Bromomethane <4.00 4.00 ug/L 11/14/15 08:26 1 2-Butanone (MEK) <10.0 10.0 ug/L 11/14/15 08:26 1 9 n-Butylbenzene <1.00 1.00 ug/L 11/14/15 08:26 1 sec-Butylbenzene <1.00 1.00 ug/L 11/14/15 08:26 1 10 tert-Butylbenzene <1.00 1.00 ug/L 11/14/15 08:26 1 Carbon disulfide <1.00 1.00 ug/L 11/14/15 08:26 1 Carbon tetrachloride <2.00 2.00 ug/L 11/14/15 08:26 1 11 Chlorobenzene <1.00 1.00 ug/L 11/14/15 08:26 1 Chlorodibromomethane <5.00 5.00 ug/L 11/14/15 08:26 1 12 Chloroethane <4.00 4.00 ug/L 11/14/15 08:26 1 Chloroform <1.00 1.00 ug/L 11/14/15 08:26 1 13 Chloromethane <3.00 3.00 ug/L 11/14/15 08:26 1 2-Chlorotoluene <1.00 1.00 ug/L 11/14/15 08:26 1 14 4-Chlorotoluene <1.00 1.00 ug/L 11/14/15 08:26 1 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/14/15 08:26 1 15 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/14/15 08:26 1 Dibromomethane <1.00 1.00 ug/L 11/14/15 08:26 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 08:26 1 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 08:26 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 08:26 1 Dichlorodifluoromethane <3.00 ^ 3.00 ug/L 11/14/15 08:26 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/14/15 08:26 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/14/15 08:26 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/14/15 08:26 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/14/15 08:26 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/14/15 08:26 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/14/15 08:26 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/14/15 08:26 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/14/15 08:26 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/14/15 08:26 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/14/15 08:26 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/14/15 08:26 1 Ethylbenzene <1.00 1.00 ug/L 11/14/15 08:26 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/14/15 08:26 1 Hexane <1.00 1.00 ug/L 11/14/15 08:26 1 Isopropylbenzene <1.00 1.00 ug/L 11/14/15 08:26 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/14/15 08:26 1 Methylene Chloride <5.00 5.00 ug/L 11/14/15 08:26 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/14/15 08:26 1 Naphthalene <5.00 5.00 ug/L 11/14/15 08:26 1 N-Propylbenzene <1.00 1.00 ug/L 11/14/15 08:26 1 Styrene <1.00 1.00 ug/L 11/14/15 08:26 1 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/14/15 08:26 1

TestAmerica Cedar Falls

Page 45 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E Lab Sample ID: 310-68446-9 Date Collected: 11/05/15 13:10 Matrix: Ground Water 3 Date Received: 11/06/15 10:00 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/14/15 08:26 1 Tetrachloroethene <1.00 1.00 ug/L 11/14/15 08:26 1 6 Toluene <1.00 1.00 ug/L 11/14/15 08:26 1 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/14/15 08:26 1 7 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/14/15 08:26 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/14/15 08:26 1 8 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/14/15 08:26 1 Trichloroethene <1.00 1.00 ug/L 11/14/15 08:26 1 Trichlorofluoromethane <4.00 4.00 ug/L 11/14/15 08:26 1 9 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/14/15 08:26 1 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/14/15 08:26 1 10 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/14/15 08:26 1 Vinyl chloride <1.00 1.00 ug/L 11/14/15 08:26 1 11 Xylenes, Total <3.00 3.00 ug/L 11/14/15 08:26 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 98 75 - 120 11/14/15 08:26 1 13 Dibromofluoromethane (Surr) 104 75 - 120 11/14/15 08:26 1 Toluene-d8 (Surr) 99 80 - 120 11/14/15 08:26 1 14 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Benzo[a]anthracene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Benzo[a]pyrene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Benzidine <101 101 ug/L 11/11/15 14:30 11/16/15 17:19 1 Benzo[b]fluoranthene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Benzo[g,h,i]perylene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Benzo[k]fluoranthene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Acenaphthene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Acenaphthylene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Benzyl alcohol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Butyl benzyl phthalate <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Bis(2-chloroethyl)ether <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Bis(2-chloroethoxy)methane <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Bis(2-ethylhexyl) phthalate 13.2 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 bis (2-chloroisopropyl) ether <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 4-Bromophenyl phenyl ether <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Carbazole <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 4-Chloroaniline <10.1 * 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2-Chloronaphthalene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 4-Chlorophenyl phenyl ether <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Chrysene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Dibenz(a,h)anthracene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Dibenzofuran <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Di-n-butyl phthalate <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 1,2-Dichlorobenzene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 1,3-Dichlorobenzene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 1,4-Dichlorobenzene <10.1 * 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 3,3'-Dichlorobenzidine <50.5 50.5 ug/L 11/11/15 14:30 11/16/15 17:19 1

TestAmerica Cedar Falls

Page 46 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E Lab Sample ID: 310-68446-9 Date Collected: 11/05/15 13:10 Matrix: Ground Water 3 Date Received: 11/06/15 10:00 4 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Diethyl phthalate <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Dimethyl phthalate <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 6 2,4-Dinitrotoluene <10.1 * 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2,6-Dinitrotoluene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 7 Fluorene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Hexachlorobenzene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 8 Hexachlorobutadiene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Hexachlorocyclopentadiene <20.2 20.2 ug/L 11/11/15 14:30 11/16/15 17:19 1 Hexachloroethane <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 9 Di-n-octyl phthalate <20.2 20.2 ug/L 11/11/15 14:30 11/16/15 17:19 1 Fluoranthene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 10 Indeno[1,2,3-cd]pyrene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Isophorone <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 11 2-Methylnaphthalene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Naphthalene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 12 2-Nitroaniline <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 3-Nitroaniline <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 13 4-Nitroaniline <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Nitrobenzene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 14 N-Nitrosodiphenylamine <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 N-Nitrosodi-n-propylamine <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 15 N-Nitrosodimethylamine <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Phenanthrene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Pyrene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Pyridine <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 1,2,4-Trichlorobenzene <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Benzoic acid <101 101 ug/L 11/11/15 14:30 11/16/15 17:19 1 4-Chloro-3-methylphenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2-Chlorophenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Total Cresols <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2,4-Dichlorophenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2,4-Dimethylphenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2,4-Dinitrophenol <20.2 20.2 ug/L 11/11/15 14:30 11/16/15 17:19 1 4,6-Dinitro-2-methylphenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2-Methylphenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Methylphenol, 3 & 4 <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2-Nitrophenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 4-Nitrophenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Pentachlorophenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 Phenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2,4,5-Trichlorophenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1 2,4,6-Trichlorophenol <10.1 10.1 ug/L 11/11/15 14:30 11/16/15 17:19 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 22 15 - 50 11/11/15 14:30 11/16/15 17:19 1 Phenol-d6 (Surr) 17 10 - 35 11/11/15 14:30 11/16/15 17:19 1 Nitrobenzene-d5 (Surr) 39 25 - 80 11/11/15 14:30 11/16/15 17:19 1 2-Fluorobiphenyl (Surr) 37 25 - 80 11/11/15 14:30 11/16/15 17:19 1 2,4,6-Tribromophenol (Surr) 40 25 - 100 11/11/15 14:30 11/16/15 17:19 1 Terphenyl-d14 (Surr) 34 30 - 105 11/11/15 14:30 11/16/15 17:19 1

TestAmerica Cedar Falls

Page 47 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 3 Aldrin <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 alpha-BHC <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 4 beta-BHC <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 Chlordane (technical) <2.22 2.22 ug/L 11/10/15 09:46 11/11/15 16:45 1 5 4,4'-DDD <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 4,4'-DDE <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 6 4,4'-DDT <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 delta-BHC <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 7 Dieldrin <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 Endosulfan I <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 8 Endosulfan II <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 Endosulfan sulfate <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 9 Endrin <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 Endrin aldehyde <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 10 gamma-BHC (Lindane) <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 Heptachlor <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 Heptachlor epoxide <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 11 Methoxychlor <0.0356 0.0356 ug/L 11/10/15 09:46 11/11/15 16:45 1 Toxaphene <2.22 2.22 ug/L 11/10/15 09:46 11/11/15 16:45 1 12

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13 DCB Decachlorobiphenyl (Surr) 21 X 30 - 125 11/10/15 09:46 11/11/15 16:45 1 Tetrachloro-m-xylene 38 15 - 115 11/10/15 09:46 11/11/15 16:45 1 14 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 PCB-1016 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:22 1 PCB-1221 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:22 1 PCB-1232 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:22 1 PCB-1242 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:22 1 PCB-1248 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:22 1 PCB-1254 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:22 1 PCB-1260 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:22 1 PCB-1268 <0.870 0.870 ug/L 11/10/15 09:48 11/11/15 16:22 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 31 25 - 115 11/10/15 09:48 11/11/15 16:22 1 Tetrachloro-m-xylene 72 20 - 90 11/10/15 09:48 11/11/15 16:22 1

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <300 * 300 ug/L 11/11/15 14:26 11/13/15 23:43 1 Gasoline <300 300 ug/L 11/11/15 14:26 11/13/15 23:43 1 Waste Oil <300 300 ug/L 11/11/15 14:26 11/13/15 23:43 1 Total Extractable Hydrocarbons <500 500 ug/L 11/11/15 14:26 11/13/15 23:43 1

Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 96 45 - 140 11/11/15 14:26 11/13/15 23:43 1

Method: 6020A - Metals (ICP/MS) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:39 1 Arsenic 0.00324 0.00200 mg/L 11/10/15 18:21 11/11/15 14:39 1 Beryllium <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:39 1 Cadmium 0.00766 0.000500 mg/L 11/10/15 18:21 11/11/15 14:39 1

TestAmerica Cedar Falls

Page 48 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E Lab Sample ID: 310-68446-9 Date Collected: 11/05/15 13:10 Matrix: Ground Water 3 Date Received: 11/06/15 10:00 4 Method: 6020A - Metals (ICP/MS) (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Chromium 0.0171 0.00500 mg/L 11/10/15 18:21 11/11/15 14:39 1 Copper 0.0228 0.00200 mg/L 11/10/15 18:21 11/11/15 14:39 1 6 Lead 0.00141 0.000500 mg/L 11/10/15 18:21 11/11/15 14:39 1 Nickel 0.208 0.00500 mg/L 11/10/15 18:21 11/11/15 14:39 1 7 Selenium 0.00924 0.00500 mg/L 11/10/15 18:21 11/11/15 14:39 1 Silver <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:39 1 8 Thallium <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:39 1 Zinc 0.0519 0.0100 mg/L 11/10/15 18:21 11/11/15 14:39 1 9 Method: 7470A - Mercury (CVAA) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 10 Mercury 0.00422 0.000200 mg/L 11/10/15 13:12 11/11/15 10:53 1 11 12 13 14 15

TestAmerica Cedar Falls

Page 49 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: Trip Blank Lab Sample ID: 310-68446-10 3 Date Collected: 11/04/15 00:00 Matrix: Water Date Received: 11/06/15 10:00 4 Method: 8260C - Volatile Organic Compounds by GC/MS Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Acetone <10.0 10.0 ug/L 11/14/15 08:00 1 Benzene <0.500 0.500 ug/L 11/14/15 08:00 1 6 Bromobenzene <1.00 1.00 ug/L 11/14/15 08:00 1 Bromochloromethane <5.00 5.00 ug/L 11/14/15 08:00 1 7 Bromodichloromethane <1.00 1.00 ug/L 11/14/15 08:00 1 Bromoform <5.00 5.00 ug/L 11/14/15 08:00 1 8 Bromomethane <4.00 4.00 ug/L 11/14/15 08:00 1 2-Butanone (MEK) <10.0 10.0 ug/L 11/14/15 08:00 1 9 n-Butylbenzene <1.00 1.00 ug/L 11/14/15 08:00 1 sec-Butylbenzene <1.00 1.00 ug/L 11/14/15 08:00 1 10 tert-Butylbenzene <1.00 1.00 ug/L 11/14/15 08:00 1 Carbon disulfide <1.00 1.00 ug/L 11/14/15 08:00 1 Carbon tetrachloride <2.00 2.00 ug/L 11/14/15 08:00 1 11 Chlorobenzene <1.00 1.00 ug/L 11/14/15 08:00 1 Chlorodibromomethane <5.00 5.00 ug/L 11/14/15 08:00 1 12 Chloroethane <4.00 4.00 ug/L 11/14/15 08:00 1 Chloroform <1.00 1.00 ug/L 11/14/15 08:00 1 13 Chloromethane <3.00 3.00 ug/L 11/14/15 08:00 1 2-Chlorotoluene <1.00 1.00 ug/L 11/14/15 08:00 1 14 4-Chlorotoluene <1.00 1.00 ug/L 11/14/15 08:00 1 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/14/15 08:00 1 15 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/14/15 08:00 1 Dibromomethane <1.00 1.00 ug/L 11/14/15 08:00 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 08:00 1 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 08:00 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 08:00 1 Dichlorodifluoromethane <3.00 ^ 3.00 ug/L 11/14/15 08:00 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/14/15 08:00 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/14/15 08:00 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/14/15 08:00 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/14/15 08:00 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/14/15 08:00 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/14/15 08:00 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/14/15 08:00 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/14/15 08:00 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/14/15 08:00 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/14/15 08:00 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/14/15 08:00 1 Ethylbenzene <1.00 1.00 ug/L 11/14/15 08:00 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/14/15 08:00 1 Hexane <1.00 1.00 ug/L 11/14/15 08:00 1 Isopropylbenzene <1.00 1.00 ug/L 11/14/15 08:00 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/14/15 08:00 1 Methylene Chloride <5.00 5.00 ug/L 11/14/15 08:00 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/14/15 08:00 1 Naphthalene <5.00 5.00 ug/L 11/14/15 08:00 1 N-Propylbenzene <1.00 1.00 ug/L 11/14/15 08:00 1 Styrene <1.00 1.00 ug/L 11/14/15 08:00 1 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/14/15 08:00 1

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Page 50 of 119 11/19/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: Trip Blank Lab Sample ID: 310-68446-10 Date Collected: 11/04/15 00:00 Matrix: Water 3 Date Received: 11/06/15 10:00 4 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/14/15 08:00 1 Tetrachloroethene <1.00 1.00 ug/L 11/14/15 08:00 1 6 Toluene <1.00 1.00 ug/L 11/14/15 08:00 1 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/14/15 08:00 1 7 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/14/15 08:00 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/14/15 08:00 1 8 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/14/15 08:00 1 Trichloroethene <1.00 1.00 ug/L 11/14/15 08:00 1 Trichlorofluoromethane <4.00 4.00 ug/L 11/14/15 08:00 1 9 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/14/15 08:00 1 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/14/15 08:00 1 10 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/14/15 08:00 1 Vinyl chloride <1.00 1.00 ug/L 11/14/15 08:00 1 11 Xylenes, Total <3.00 3.00 ug/L 11/14/15 08:00 1 12 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 4-Bromofluorobenzene (Surr) 95 75 - 120 11/14/15 08:00 1 13 Dibromofluoromethane (Surr) 100 75 - 120 11/14/15 08:00 1 Toluene-d8 (Surr) 98 80 - 120 11/14/15 08:00 1 14 15

TestAmerica Cedar Falls

Page 51 of 119 11/19/2015 Definitions/Glossary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Qualifiers 3 GC/MS VOA 4 Qualifier Qualifier Description * LCS or LCSD is outside acceptance limits. * RPD of the LCS and LCSD exceeds the control limits 5 ^ ICV,CCV,ICB,CCB, ISA, ISB, CRI, CRA, DLCK or MRL standard: Instrument related QC is outside acceptance limits. F1 MS and/or MSD Recovery is outside acceptance limits. 6 J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. GC/MS Semi VOA 7 Qualifier Qualifier Description X Surrogate is outside control limits 8 * RPD of the LCS and LCSD exceeds the control limits * LCS or LCSD is outside acceptance limits. 9 J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value. 10 GC Semi VOA Qualifier Qualifier Description 11 X Surrogate is outside control limits * LCS or LCSD is outside acceptance limits. F2 MS/MSD RPD exceeds control limits 12 Z The chromatographic response does not resemble a typical fuel pattern. D Surrogate or matrix spike recoveries were not obtained because the extract was diluted for analysis; also compounds analyzed at a 13 dilution may be flagged with a D. * RPD of the LCS and LCSD exceeds the control limits 14

Glossary 15

Abbreviation These commonly used abbreviations may or may not be present in this report. ¤ Listed under the "D" column to designate that the result is reported on a dry weight basis %R Percent Recovery CFL Contains Free Liquid CNF Contains no Free Liquid DER Duplicate error ratio (normalized absolute difference) Dil Fac Dilution Factor DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample DLC Decision level concentration MDA Minimum detectable activity EDL Estimated Detection Limit MDC Minimum detectable concentration MDL Method Detection Limit ML Minimum Level (Dioxin) NC Not Calculated ND Not detected at the reporting limit (or MDL or EDL if shown) PQL Practical Quantitation Limit QC Quality Control RER Relative error ratio RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin)

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Page 52 of 119 11/19/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS 3 Matrix: Ground Water Prep Type: Total/NA 4 Percent Surrogate Recovery (Acceptance Limits) BFB DBFM TOL Lab Sample ID Client Sample ID (75-120) (75-120) (80-120) 5 310-68446-7 B-2E 100 105 98 310-68446-7 MS B-2E 102 99 93 6 310-68446-7 MSD B-2E 102 103 100 310-68446-8 B-4E 96 102 99 7 310-68446-9 B-5E 98 104 99 8 Surrogate Legend BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) 9 TOL = Toluene-d8 (Surr) 10 Method: 8260C - Volatile Organic Compounds by GC/MS 11 Matrix: Soil Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) 12 BFB DBFM TOL Lab Sample ID Client Sample ID (80-120) (75-125) (80-120) 13 310-68446-1 B-2E 0-1.5' 101 95 100 310-68446-3 B-3E 1-2' 101 90 96 14 310-68446-4 B-4E 0-1' 102 94 96 310-68446-5 B-5E 0.5-3' 97 93 98 15 310-68446-6 B-6E 0-1.4' 97 93 98

Surrogate Legend BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) TOL = Toluene-d8 (Surr)

Method: 8260C - Volatile Organic Compounds by GC/MS Matrix: Solid Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) BFB DBFM TOL Lab Sample ID Client Sample ID (80-120) (75-125) (80-120) LCS 310-107903/2-A Lab Control Sample 99 101 98 LCS 310-109058/2-A Lab Control Sample 98 100 99 LCS 310-109247/2-A Lab Control Sample 99 102 99 LCSD 310-109058/3-A Lab Control Sample Dup 100 99 101 LCSD 310-109247/3-A Lab Control Sample Dup 100 100 99 MB 310-107903/1-A Method Blank 100 98 95 MB 310-109058/1-A Method Blank 98 98 99 MB 310-109247/1-A Method Blank 99 94 98

Surrogate Legend BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) TOL = Toluene-d8 (Surr)

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Page 53 of 119 11/19/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS 3 Matrix: Water Prep Type: Total/NA 4 Percent Surrogate Recovery (Acceptance Limits) BFB DBFM TOL Lab Sample ID Client Sample ID (75-120) (75-120) (80-120) 5 310-68446-10 Trip Blank 95 100 98 LCS 310-108662/5 Lab Control Sample 94 102 99 6 LCS 310-108840/5 Lab Control Sample 99 100 98 MB 310-108662/7 Method Blank 94 101 97 7 MB 310-108840/7 Method Blank 101 100 99 8 Surrogate Legend BFB = 4-Bromofluorobenzene (Surr) DBFM = Dibromofluoromethane (Surr) 9 TOL = Toluene-d8 (Surr) 10 Method: 8270D - Semivolatile Organic Compounds (GC/MS) 11 Matrix: Ground Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) 12 2FP PHL NBZ FBP TBP TPH Lab Sample ID Client Sample ID (15-50) (10-35) (25-80) (25-80) (25-100) (30-105) 13 310-68446-7 B-2E 31 22 61 59 60 77 310-68446-8 B-4E 27 21 53 49 63 72 14 310-68446-9 B-5E 22 17 39 37 40 34

Surrogate Legend 15 2FP = 2-Fluorophenol (Surr) PHL = Phenol-d6 (Surr) NBZ = Nitrobenzene-d5 (Surr) FBP = 2-Fluorobiphenyl (Surr) TBP = 2,4,6-Tribromophenol (Surr) TPH = Terphenyl-d14 (Surr)

Method: 8270D - Semivolatile Organic Compounds (GC/MS) Matrix: Soil Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) 2FP PHL NBZ FBP TBP TPH Lab Sample ID Client Sample ID (15-90) (20-90) (15-90) (20-90) (25-105) (35-110) 310-68446-1 B-2E 0-1.5' 14 X 17 X 24 26 19 X 33 X 310-68446-2 B-3E 0-1' 15 17 X 19 23 24 X 29 X 310-68446-4 B-4E 0-1' 31 36 40 45 46 51 310-68446-5 B-5E 0.5-3' 32 37 41 42 42 52 310-68446-6 B-6E 0-1.4' 13 X 15 X 21 34 14 X 34 X

Surrogate Legend 2FP = 2-Fluorophenol (Surr) PHL = Phenol-d6 (Surr) NBZ = Nitrobenzene-d5 (Surr) FBP = 2-Fluorobiphenyl (Surr) TBP = 2,4,6-Tribromophenol (Surr) TPH = Terphenyl-d14 (Surr)

TestAmerica Cedar Falls

Page 54 of 119 11/19/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) 3 Matrix: Solid Prep Type: Total/NA 4 Percent Surrogate Recovery (Acceptance Limits) 2FP PHL NBZ FBP TBP TPH Lab Sample ID Client Sample ID (15-90) (20-90) (15-90) (20-90) (25-105) (35-110) 5 LCS 310-108051/2-A Lab Control Sample 44 46 47 52 62 77 MB 310-108051/1-A Method Blank 38 42 41 46 55 84 6 Surrogate Legend 7 2FP = 2-Fluorophenol (Surr) PHL = Phenol-d6 (Surr) NBZ = Nitrobenzene-d5 (Surr) 8 FBP = 2-Fluorobiphenyl (Surr) TBP = 2,4,6-Tribromophenol (Surr) 9 TPH = Terphenyl-d14 (Surr) 10 Method: 8270D - Semivolatile Organic Compounds (GC/MS) Matrix: Water Prep Type: Total/NA 11

Percent Surrogate Recovery (Acceptance Limits) 12 2FP PHL NBZ FBP TBP TPH Lab Sample ID Client Sample ID (15-50) (10-35) (25-80) (25-80) (25-100) (30-105) 13 LCS 310-108193/2-A Lab Control Sample 19 14 35 37 39 53 LCSD 310-108193/3-A Lab Control Sample Dup 25 17 43 46 42 51 14 MB 310-108193/1-A Method Blank 26 18 44 45 45 64

Surrogate Legend 15 2FP = 2-Fluorophenol (Surr) PHL = Phenol-d6 (Surr) NBZ = Nitrobenzene-d5 (Surr) FBP = 2-Fluorobiphenyl (Surr) TBP = 2,4,6-Tribromophenol (Surr) TPH = Terphenyl-d14 (Surr)

Method: 8081B - Organochlorine Pesticides (GC) Matrix: Ground Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (30-125) (15-115) 310-68446-7 B-2E 27 X 38 310-68446-8 B-4E 26 X 37 310-68446-9 B-5E 21 X 38

Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene

Method: 8081B - Organochlorine Pesticides (GC) Matrix: Soil Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (56-128) (45-112) 310-68446-1 B-2E 0-1.5' 111 115 X

TestAmerica Cedar Falls

Page 55 of 119 11/19/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) (Continued) 3 Matrix: Soil Prep Type: Total/NA 4 Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (56-128) (45-112) 5 310-68446-2 B-3E 0-1' 162 X 95 310-68446-4 B-4E 0-1' 0 D 0 D 6 310-68446-5 B-5E 0.5-3' 103 84 310-68446-6 B-6E 0-1.4' 0 D 0 D 7

Surrogate Legend DCB = DCB Decachlorobiphenyl 8 TCX = Tetrachloro-m-xylene 9 Method: 8081B - Organochlorine Pesticides (GC) 10 Matrix: Solid Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) 11 DCB1 TCX1 Lab Sample ID Client Sample ID (56-128) (45-112) 12 LCS 500-312063/2-A Lab Control Sample 106 98 MB 500-312063/1-A Method Blank 109 90 13 Surrogate Legend DCB = DCB Decachlorobiphenyl 14 TCX = Tetrachloro-m-xylene 15 Method: 8081B - Organochlorine Pesticides (GC) Matrix: Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (30-125) (15-115) LCS 310-108089/13-A Lab Control Sample 43 37 LCS 310-108089/14-A Lab Control Sample 44 35 LCS 310-108089/2-A Lab Control Sample 47 36 LCSD 310-108089/3-A Lab Control Sample Dup 46 37 MB 310-108089/1-A Method Blank 49 37

Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Matrix: Ground Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (25-115) (20-90) 310-68446-7 B-2E 54 71 310-68446-8 B-4E 44 70 310-68446-9 B-5E 31 72

Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene

TestAmerica Cedar Falls

Page 56 of 119 11/19/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography 3 Matrix: Soil Prep Type: Total/NA 4 Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (40-120) (10-105) 5 310-68446-1 B-2E 0-1.5' 58 40 310-68446-1 MS B-2E 0-1.5' 30 X 22 6 310-68446-1 MSD B-2E 0-1.5' 46 33 310-68446-2 B-3E 0-1' 21 X 19 7 310-68446-4 B-4E 0-1' 84 68 310-68446-5 B-5E 0.5-3' 71 65 8 310-68446-6 B-6E 0-1.4' 43 40

Surrogate Legend 9 DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene 10

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography 11 Matrix: Solid Prep Type: Total/NA 12 Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 13 Lab Sample ID Client Sample ID (40-120) (10-105) LCS 310-107873/2-A Lab Control Sample 88 71 14 LCS 310-108353/2-A Lab Control Sample 80 69 MB 310-107873/1-A Method Blank 94 83 15 MB 310-108353/1-A Method Blank 74 57

Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography Matrix: Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) DCB1 TCX1 Lab Sample ID Client Sample ID (25-115) (20-90) LCS 310-108090/2-A Lab Control Sample 98 74 LCSD 310-108090/3-A Lab Control Sample Dup 98 74 MB 310-108090/1-A Method Blank 104 80

Surrogate Legend DCB = DCB Decachlorobiphenyl (Surr) TCX = Tetrachloro-m-xylene

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Matrix: Ground Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) OTC Lab Sample ID Client Sample ID (45-140) 310-68446-7 B-2E 95 310-68446-8 B-4E 93 310-68446-9 B-5E 96

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Page 57 of 119 11/19/2015 Surrogate Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2

Surrogate Legend 3 OTC = n-Octacosane 4 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Matrix: Soil Prep Type: Total/NA 5 Percent Surrogate Recovery (Acceptance Limits) 6 OTC Lab Sample ID Client Sample ID (40-135) 7 310-68446-1 B-2E 0-1.5' 137 X 310-68446-2 B-3E 0-1' 141 X 8 310-68446-4 B-4E 0-1' 94 310-68446-5 B-5E 0.5-3' 92 310-68446-6 B-6E 0-1.4' 209 X 9 Surrogate Legend 10 OTC = n-Octacosane 11 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Matrix: Solid Prep Type: Total/NA 12

Percent Surrogate Recovery (Acceptance Limits) OTC 13 Lab Sample ID Client Sample ID (40-135) LCS 310-108046/2-A Lab Control Sample 88 14 MB 310-108046/1-A Method Blank 82 15 Surrogate Legend OTC = n-Octacosane

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) Matrix: Water Prep Type: Total/NA

Percent Surrogate Recovery (Acceptance Limits) OTC Lab Sample ID Client Sample ID (45-140) LCS 310-108191/2-A Lab Control Sample 90 LCSD 310-108191/3-A Lab Control Sample Dup 72 MB 310-108191/1-A Method Blank 86

Surrogate Legend OTC = n-Octacosane

TestAmerica Cedar Falls

Page 58 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS 3 Lab Sample ID: MB 310-107903/1-A Client Sample ID: Method Blank 4 Matrix: Solid Prep Type: Total/NA Analysis Batch: 107904 Prep Batch: 107903 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone <120 120 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 6 Benzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Bromobenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 7 Bromochloromethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Bromodichloromethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 8 Bromoform <24.1 24.1 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Bromomethane <48.2 48.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 9 2-Butanone (MEK) <120 120 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 n-Butylbenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 10 sec-Butylbenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 tert-Butylbenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 11 Carbon disulfide <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Carbon tetrachloride <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 12 Chlorobenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Chlorodibromomethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Chloroethane <48.2 48.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 13 Chloroform <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Chloromethane <48.2 48.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 14 2-Chlorotoluene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 4-Chlorotoluene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 15 1,2-Dibromo-3-Chloropropane <120 120 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,2-Dibromoethane (EDB) <120 120 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Dibromomethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,2-Dichlorobenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,3-Dichlorobenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,4-Dichlorobenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Dichlorodifluoromethane <36.1 36.1 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,1-Dichloroethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,2-Dichloroethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,1-Dichloroethene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 cis-1,2-Dichloroethene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 trans-1,2-Dichloroethene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,2-Dichloropropane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,3-Dichloropropane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 2,2-Dichloropropane <48.2 48.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,1-Dichloropropene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 cis-1,3-Dichloropropene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 trans-1,3-Dichloropropene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Ethylbenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Hexachlorobutadiene <60.2 60.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Hexane <60.2 60.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Isopropylbenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 p-Isopropyltoluene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Methylene Chloride <120 120 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Methyl tert-butyl ether <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Naphthalene <60.2 60.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 N-Propylbenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Styrene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1

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Page 59 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-107903/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107904 Prep Batch: 107903 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,1,1,2-Tetrachloroethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 6 1,1,2,2-Tetrachloroethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Tetrachloroethene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 7 Toluene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,2,3-Trichlorobenzene <60.2 60.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 8 1,2,4-Trichlorobenzene <60.2 60.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,1,1-Trichloroethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 9 1,1,2-Trichloroethane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Trichloroethene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 10 Trichlorofluoromethane <48.2 48.2 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,2,3-Trichloropropane <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 1,2,4-Trimethylbenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 11 1,3,5-Trimethylbenzene <12.0 12.0 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 Vinyl chloride <36.1 36.1 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 12 Xylenes, Total <36.1 36.1 ug/Kg 11/09/15 10:48 11/09/15 13:17 1 13 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 14 4-Bromofluorobenzene (Surr) 100 80 - 120 11/09/15 10:48 11/09/15 13:17 1 Dibromofluoromethane (Surr) 98 75 - 125 11/09/15 10:48 11/09/15 13:17 1 Toluene-d8 (Surr) 95 80 - 120 11/09/15 10:48 11/09/15 13:17 1 15

Lab Sample ID: LCS 310-107903/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 107904 Prep Batch: 107903 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Acetone 77.4 91.17 J ug/Kg 118 65 - 150 Benzene 38.7 45.93 ug/Kg 119 55 - 135 Bromobenzene 38.7 45.12 ug/Kg 117 65 - 125 Bromochloromethane 38.7 47.28 ug/Kg 122 65 - 130 Bromodichloromethane 38.7 42.51 ug/Kg 110 65 - 130 Bromoform 38.7 41.33 ug/Kg 107 50 - 135 2-Butanone (MEK) 77.4 84.30 J ug/Kg 109 50 - 145 n-Butylbenzene 38.7 42.89 ug/Kg 111 55 - 130 sec-Butylbenzene 38.7 44.20 ug/Kg 114 60 - 125 tert-Butylbenzene 38.7 45.49 ug/Kg 118 55 - 125 Carbon disulfide 38.7 38.75 ug/Kg 100 40 - 135 Carbon tetrachloride 38.7 46.10 ug/Kg 119 55 - 130 Chlorobenzene 38.7 44.14 ug/Kg 114 60 - 120 Chlorodibromomethane 38.7 41.13 ug/Kg 106 55 - 130 Chloroform 38.7 47.97 ug/Kg 124 65 - 130 2-Chlorotoluene 38.7 42.94 ug/Kg 111 60 - 125 4-Chlorotoluene 38.7 43.25 ug/Kg 112 60 - 125 1,2-Dibromo-3-Chloropropane 38.7 44.62 J ug/Kg 115 50 - 140 1,2-Dibromoethane (EDB) 38.7 44.24 J ug/Kg 114 55 - 140 Dibromomethane 38.7 44.90 ug/Kg 116 65 - 135 1,2-Dichlorobenzene 38.7 44.33 ug/Kg 115 65 - 120 1,3-Dichlorobenzene 38.7 43.05 ug/Kg 111 60 - 125

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Page 60 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-107903/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 107904 Prep Batch: 107903 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits 1,4-Dichlorobenzene 38.7 43.39 ug/Kg 112 60 - 125 6 1,1-Dichloroethane 38.7 44.67 ug/Kg 115 55 - 135 1,2-Dichloroethane 38.7 46.84 ug/Kg 121 60 - 140 7 1,1-Dichloroethene 38.7 41.90 ug/Kg 108 50 - 145 cis-1,2-Dichloroethene 38.7 45.08 ug/Kg 117 60 - 135 8 trans-1,2-Dichloroethene 38.7 45.12 ug/Kg 117 55 - 135 1,2-Dichloropropane 38.7 43.20 ug/Kg 112 55 - 130 9 1,3-Dichloropropane 38.7 47.26 ug/Kg 122 55 - 140 2,2-Dichloropropane 38.7 49.35 ug/Kg 128 40 - 135 10 1,1-Dichloropropene 38.7 45.73 ug/Kg 118 55 - 130 cis-1,3-Dichloropropene 38.7 42.39 ug/Kg 110 50 - 115 trans-1,3-Dichloropropene 38.7 42.43 ug/Kg 110 55 - 130 11 Ethylbenzene 38.7 44.31 ug/Kg 115 60 - 125 Hexachlorobutadiene 38.7 44.20 J ug/Kg 114 40 - 135 12 Hexane 38.7 34.76 J ug/Kg 90 45 - 140 Isopropylbenzene 38.7 44.94 ug/Kg 116 60 - 125 13 p-Isopropyltoluene 38.7 43.34 ug/Kg 112 60 - 120 Methylene Chloride 38.7 54.29 J ug/Kg 140 55 - 145 14 Methyl tert-butyl ether 38.7 46.81 ug/Kg 121 55 - 130 Naphthalene 38.7 50.22 ug/Kg 130 50 - 130 15 N-Propylbenzene 38.7 43.30 ug/Kg 112 50 - 125 Styrene 38.7 44.29 ug/Kg 114 60 - 125 1,1,1,2-Tetrachloroethane 38.7 43.54 ug/Kg 113 65 - 125 1,1,2,2-Tetrachloroethane 38.7 43.07 ug/Kg 111 60 - 125 Tetrachloroethene 38.7 39.93 ug/Kg 103 55 - 125 Toluene 38.7 43.53 ug/Kg 113 60 - 130 1,2,3-Trichlorobenzene 38.7 43.69 J ug/Kg 113 50 - 130 1,2,4-Trichlorobenzene 38.7 43.97 J ug/Kg 114 45 - 135 1,1,1-Trichloroethane 38.7 48.78 * ug/Kg 126 60 - 125 1,1,2-Trichloroethane 38.7 42.65 ug/Kg 110 55 - 135 Trichloroethene 38.7 47.47 ug/Kg 123 60 - 130 1,2,3-Trichloropropane 38.7 47.00 ug/Kg 121 50 - 145 1,2,4-Trimethylbenzene 38.7 43.01 ug/Kg 111 55 - 125 1,3,5-Trimethylbenzene 38.7 43.18 ug/Kg 112 50 - 130 Xylenes, Total 77.4 87.46 ug/Kg 113 50 - 130

LCS LCS Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 99 80 - 120 Dibromofluoromethane (Surr) 101 75 - 125 Toluene-d8 (Surr) 98 80 - 120

Lab Sample ID: MB 310-108662/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 108662 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone <10.0 10.0 ug/L 11/14/15 04:25 1 Benzene <0.500 0.500 ug/L 11/14/15 04:25 1

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Page 61 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-108662/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108662 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Bromobenzene <1.00 1.00 ug/L 11/14/15 04:25 1 6 Bromochloromethane <5.00 5.00 ug/L 11/14/15 04:25 1 Bromodichloromethane <1.00 1.00 ug/L 11/14/15 04:25 1 7 Bromoform <5.00 5.00 ug/L 11/14/15 04:25 1 Bromomethane <4.00 4.00 ug/L 11/14/15 04:25 1 8 2-Butanone (MEK) <10.0 10.0 ug/L 11/14/15 04:25 1 n-Butylbenzene <1.00 1.00 ug/L 11/14/15 04:25 1 9 sec-Butylbenzene <1.00 1.00 ug/L 11/14/15 04:25 1 tert-Butylbenzene <1.00 1.00 ug/L 11/14/15 04:25 1 10 Carbon disulfide <1.00 1.00 ug/L 11/14/15 04:25 1 Carbon tetrachloride <2.00 2.00 ug/L 11/14/15 04:25 1 Chlorobenzene <1.00 1.00 ug/L 11/14/15 04:25 1 11 Chlorodibromomethane <5.00 5.00 ug/L 11/14/15 04:25 1 Chloroethane <4.00 4.00 ug/L 11/14/15 04:25 1 12 Chloroform <1.00 1.00 ug/L 11/14/15 04:25 1 Chloromethane <3.00 3.00 ug/L 11/14/15 04:25 1 13 2-Chlorotoluene <1.00 1.00 ug/L 11/14/15 04:25 1 4-Chlorotoluene <1.00 1.00 ug/L 11/14/15 04:25 1 14 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/14/15 04:25 1 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/14/15 04:25 1 15 Dibromomethane <1.00 1.00 ug/L 11/14/15 04:25 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 04:25 1 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 04:25 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/14/15 04:25 1 Dichlorodifluoromethane <3.00 ^ 3.00 ug/L 11/14/15 04:25 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/14/15 04:25 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/14/15 04:25 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/14/15 04:25 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/14/15 04:25 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/14/15 04:25 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/14/15 04:25 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/14/15 04:25 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/14/15 04:25 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/14/15 04:25 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/14/15 04:25 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/14/15 04:25 1 Ethylbenzene <1.00 1.00 ug/L 11/14/15 04:25 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/14/15 04:25 1 Hexane <1.00 1.00 ug/L 11/14/15 04:25 1 Isopropylbenzene <1.00 1.00 ug/L 11/14/15 04:25 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/14/15 04:25 1 Methylene Chloride <5.00 5.00 ug/L 11/14/15 04:25 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/14/15 04:25 1 Naphthalene <5.00 5.00 ug/L 11/14/15 04:25 1 N-Propylbenzene <1.00 1.00 ug/L 11/14/15 04:25 1 Styrene <1.00 1.00 ug/L 11/14/15 04:25 1 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/14/15 04:25 1 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/14/15 04:25 1

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Page 62 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-108662/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108662 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Tetrachloroethene <1.00 1.00 ug/L 11/14/15 04:25 1 6 Toluene <1.00 1.00 ug/L 11/14/15 04:25 1 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/14/15 04:25 1 7 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/14/15 04:25 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/14/15 04:25 1 8 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/14/15 04:25 1 Trichloroethene <1.00 1.00 ug/L 11/14/15 04:25 1 9 Trichlorofluoromethane <4.00 4.00 ug/L 11/14/15 04:25 1 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/14/15 04:25 1 10 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/14/15 04:25 1 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/14/15 04:25 1 Vinyl chloride <1.00 1.00 ug/L 11/14/15 04:25 1 11 Xylenes, Total <3.00 3.00 ug/L 11/14/15 04:25 1 12 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 13 4-Bromofluorobenzene (Surr) 94 75 - 120 11/14/15 04:25 1 Dibromofluoromethane (Surr) 101 75 - 120 11/14/15 04:25 1 14 Toluene-d8 (Surr) 97 80 - 120 11/14/15 04:25 1

Lab Sample ID: LCS 310-108662/5 Client Sample ID: Lab Control Sample 15 Matrix: Water Prep Type: Total/NA Analysis Batch: 108662 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Acetone 40.0 39.53 ug/L 99 60 - 150 Benzene 20.0 21.44 ug/L 107 70 - 130 Bromobenzene 20.0 19.20 ug/L 96 75 - 130 Bromochloromethane 20.0 22.34 ug/L 112 65 - 145 Bromodichloromethane 20.0 18.92 ug/L 95 60 - 130 Bromoform 20.0 14.29 ug/L 71 30 - 125 2-Butanone (MEK) 40.0 38.31 ug/L 96 55 - 140 n-Butylbenzene 20.0 19.08 ug/L 95 55 - 135 sec-Butylbenzene 20.0 19.30 ug/L 96 65 - 135 tert-Butylbenzene 20.0 19.24 ug/L 96 60 - 135 Carbon disulfide 20.0 19.50 ug/L 98 40 - 130 Carbon tetrachloride 20.0 22.41 ug/L 112 55 - 130 Chlorobenzene 20.0 20.53 ug/L 103 75 - 125 Chlorodibromomethane 20.0 16.72 ug/L 84 45 - 125 Chloroform 20.0 22.08 ug/L 110 70 - 125 2-Chlorotoluene 20.0 19.72 ug/L 99 75 - 135 4-Chlorotoluene 20.0 19.64 ug/L 98 70 - 140 1,2-Dibromo-3-Chloropropane 20.0 12.80 ug/L 64 35 - 130 1,2-Dibromoethane (EDB) 20.0 18.44 ug/L 92 70 - 135 Dibromomethane 20.0 20.24 ug/L 101 75 - 130 1,2-Dichlorobenzene 20.0 18.26 ug/L 91 65 - 135 1,3-Dichlorobenzene 20.0 18.95 ug/L 95 70 - 130 1,4-Dichlorobenzene 20.0 18.77 ug/L 94 60 - 140 1,1-Dichloroethane 20.0 22.21 ug/L 111 60 - 130

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Page 63 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-108662/5 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108662 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits 1,2-Dichloroethane 20.0 21.46 ug/L 107 65 - 140 6 1,1-Dichloroethene 20.0 22.10 ug/L 111 60 - 135 cis-1,2-Dichloroethene 20.0 22.05 ug/L 110 70 - 135 7 trans-1,2-Dichloroethene 20.0 21.83 ug/L 109 60 - 145 1,2-Dichloropropane 20.0 21.04 ug/L 105 65 - 130 8 1,3-Dichloropropane 20.0 19.33 ug/L 97 75 - 125 2,2-Dichloropropane 20.0 21.47 ug/L 107 25 - 120 9 1,1-Dichloropropene 20.0 22.15 ug/L 111 60 - 140 cis-1,3-Dichloropropene 20.0 19.42 ug/L 97 30 - 120 10 trans-1,3-Dichloropropene 20.0 16.66 ug/L 83 35 - 120 Ethylbenzene 20.0 20.27 ug/L 101 70 - 130 Hexachlorobutadiene 20.0 17.34 ug/L 87 60 - 135 11 Hexane 20.0 24.69 ug/L 123 40 - 135 Isopropylbenzene 20.0 19.77 ug/L 99 70 - 125 12 p-Isopropyltoluene 20.0 19.00 ug/L 95 60 - 140 Methylene Chloride 20.0 19.25 ug/L 96 55 - 145 13 Methyl tert-butyl ether 20.0 20.00 ug/L 100 50 - 135 Naphthalene 20.0 15.58 ug/L 78 40 - 135 14 N-Propylbenzene 20.0 19.88 ug/L 99 70 - 135 Styrene 20.0 19.39 ug/L 97 70 - 130 15 1,1,1,2-Tetrachloroethane 20.0 19.65 ug/L 98 65 - 120 1,1,2,2-Tetrachloroethane 20.0 16.87 ug/L 84 65 - 130 Tetrachloroethene 20.0 20.57 ug/L 103 70 - 135 Toluene 20.0 20.58 ug/L 103 70 - 135 1,2,3-Trichlorobenzene 20.0 16.67 ug/L 83 55 - 130 1,2,4-Trichlorobenzene 20.0 16.95 ug/L 85 40 - 135 1,1,1-Trichloroethane 20.0 22.21 ug/L 111 60 - 125 1,1,2-Trichloroethane 20.0 19.26 ug/L 96 75 - 125 Trichloroethene 20.0 21.97 ug/L 110 70 - 130 1,2,3-Trichloropropane 20.0 16.88 ug/L 84 60 - 150 1,2,4-Trimethylbenzene 20.0 18.67 ug/L 93 70 - 140 1,3,5-Trimethylbenzene 20.0 18.93 ug/L 95 70 - 140 Xylenes, Total 40.0 39.67 ug/L 99 70 - 130

LCS LCS Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 94 75 - 120 Dibromofluoromethane (Surr) 102 75 - 120 Toluene-d8 (Surr) 99 80 - 120

Lab Sample ID: MB 310-108840/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 108840 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone <10.0 10.0 ug/L 11/16/15 10:35 1 Benzene <0.500 0.500 ug/L 11/16/15 10:35 1 Bromobenzene <1.00 1.00 ug/L 11/16/15 10:35 1 Bromochloromethane <5.00 5.00 ug/L 11/16/15 10:35 1

TestAmerica Cedar Falls

Page 64 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-108840/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108840 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Bromodichloromethane <1.00 1.00 ug/L 11/16/15 10:35 1 6 Bromoform <5.00 5.00 ug/L 11/16/15 10:35 1 Bromomethane <4.00 4.00 ug/L 11/16/15 10:35 1 7 2-Butanone (MEK) <10.0 10.0 ug/L 11/16/15 10:35 1 n-Butylbenzene <1.00 1.00 ug/L 11/16/15 10:35 1 8 sec-Butylbenzene <1.00 1.00 ug/L 11/16/15 10:35 1 tert-Butylbenzene <1.00 1.00 ug/L 11/16/15 10:35 1 9 Carbon disulfide <1.00 1.00 ug/L 11/16/15 10:35 1 Carbon tetrachloride <2.00 2.00 ug/L 11/16/15 10:35 1 10 Chlorobenzene <1.00 1.00 ug/L 11/16/15 10:35 1 Chlorodibromomethane <5.00 5.00 ug/L 11/16/15 10:35 1 Chloroethane <4.00 4.00 ug/L 11/16/15 10:35 1 11 Chloroform <1.00 1.00 ug/L 11/16/15 10:35 1 Chloromethane <3.00 3.00 ug/L 11/16/15 10:35 1 12 2-Chlorotoluene <1.00 1.00 ug/L 11/16/15 10:35 1 4-Chlorotoluene <1.00 1.00 ug/L 11/16/15 10:35 1 13 1,2-Dibromo-3-Chloropropane <10.0 10.0 ug/L 11/16/15 10:35 1 1,2-Dibromoethane (EDB) <10.0 10.0 ug/L 11/16/15 10:35 1 14 Dibromomethane <1.00 1.00 ug/L 11/16/15 10:35 1 1,2-Dichlorobenzene <1.00 1.00 ug/L 11/16/15 10:35 1 15 1,3-Dichlorobenzene <1.00 1.00 ug/L 11/16/15 10:35 1 1,4-Dichlorobenzene <1.00 1.00 ug/L 11/16/15 10:35 1 Dichlorodifluoromethane <3.00 3.00 ug/L 11/16/15 10:35 1 1,1-Dichloroethane <1.00 1.00 ug/L 11/16/15 10:35 1 1,2-Dichloroethane <1.00 1.00 ug/L 11/16/15 10:35 1 1,1-Dichloroethene <2.00 2.00 ug/L 11/16/15 10:35 1 cis-1,2-Dichloroethene <1.00 1.00 ug/L 11/16/15 10:35 1 trans-1,2-Dichloroethene <1.00 1.00 ug/L 11/16/15 10:35 1 1,2-Dichloropropane <1.00 1.00 ug/L 11/16/15 10:35 1 1,3-Dichloropropane <1.00 1.00 ug/L 11/16/15 10:35 1 2,2-Dichloropropane <4.00 4.00 ug/L 11/16/15 10:35 1 1,1-Dichloropropene <1.00 1.00 ug/L 11/16/15 10:35 1 cis-1,3-Dichloropropene <5.00 5.00 ug/L 11/16/15 10:35 1 trans-1,3-Dichloropropene <5.00 5.00 ug/L 11/16/15 10:35 1 Ethylbenzene <1.00 1.00 ug/L 11/16/15 10:35 1 Hexachlorobutadiene <5.00 5.00 ug/L 11/16/15 10:35 1 Hexane <1.00 1.00 ug/L 11/16/15 10:35 1 Isopropylbenzene <1.00 1.00 ug/L 11/16/15 10:35 1 p-Isopropyltoluene <1.00 1.00 ug/L 11/16/15 10:35 1 Methylene Chloride <5.00 5.00 ug/L 11/16/15 10:35 1 Methyl tert-butyl ether <1.00 1.00 ug/L 11/16/15 10:35 1 Naphthalene <5.00 5.00 ug/L 11/16/15 10:35 1 N-Propylbenzene <1.00 1.00 ug/L 11/16/15 10:35 1 Styrene <1.00 1.00 ug/L 11/16/15 10:35 1 1,1,1,2-Tetrachloroethane <1.00 1.00 ug/L 11/16/15 10:35 1 1,1,2,2-Tetrachloroethane <1.00 1.00 ug/L 11/16/15 10:35 1 Tetrachloroethene <1.00 1.00 ug/L 11/16/15 10:35 1 Toluene <1.00 1.00 ug/L 11/16/15 10:35 1

TestAmerica Cedar Falls

Page 65 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-108840/7 Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108840 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,2,3-Trichlorobenzene <5.00 5.00 ug/L 11/16/15 10:35 1 6 1,2,4-Trichlorobenzene <5.00 5.00 ug/L 11/16/15 10:35 1 1,1,1-Trichloroethane <1.00 1.00 ug/L 11/16/15 10:35 1 7 1,1,2-Trichloroethane <1.00 1.00 ug/L 11/16/15 10:35 1 Trichloroethene <1.00 1.00 ug/L 11/16/15 10:35 1 8 Trichlorofluoromethane <4.00 4.00 ug/L 11/16/15 10:35 1 1,2,3-Trichloropropane <1.00 1.00 ug/L 11/16/15 10:35 1 9 1,2,4-Trimethylbenzene <1.00 1.00 ug/L 11/16/15 10:35 1 1,3,5-Trimethylbenzene <1.00 1.00 ug/L 11/16/15 10:35 1 10 Vinyl chloride <1.00 1.00 ug/L 11/16/15 10:35 1 Xylenes, Total <3.00 3.00 ug/L 11/16/15 10:35 1 11 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 12 4-Bromofluorobenzene (Surr) 101 75 - 120 11/16/15 10:35 1 Dibromofluoromethane (Surr) 100 75 - 120 11/16/15 10:35 1 13 Toluene-d8 (Surr) 99 80 - 120 11/16/15 10:35 1

Lab Sample ID: LCS 310-108840/5 Client Sample ID: Lab Control Sample 14 Matrix: Water Prep Type: Total/NA Analysis Batch: 108840 15 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Acetone 40.0 38.94 ug/L 97 60 - 150 Benzene 20.0 20.45 ug/L 102 70 - 130 Bromobenzene 20.0 19.84 ug/L 99 75 - 130 Bromochloromethane 20.0 20.53 ug/L 103 65 - 145 Bromodichloromethane 20.0 17.99 ug/L 90 60 - 130 Bromoform 20.0 16.86 ug/L 84 30 - 125 2-Butanone (MEK) 40.0 37.98 ug/L 95 55 - 140 n-Butylbenzene 20.0 21.20 ug/L 106 55 - 135 sec-Butylbenzene 20.0 20.54 ug/L 103 65 - 135 tert-Butylbenzene 20.0 20.68 ug/L 103 60 - 135 Carbon disulfide 20.0 21.75 ug/L 109 40 - 130 Carbon tetrachloride 20.0 20.68 ug/L 103 55 - 130 Chlorobenzene 20.0 19.91 ug/L 100 75 - 125 Chlorodibromomethane 20.0 16.24 ug/L 81 45 - 125 Chloroform 20.0 20.21 ug/L 101 70 - 125 2-Chlorotoluene 20.0 19.49 ug/L 97 75 - 135 4-Chlorotoluene 20.0 19.57 ug/L 98 70 - 140 1,2-Dibromo-3-Chloropropane 20.0 18.42 ug/L 92 35 - 130 1,2-Dibromoethane (EDB) 20.0 18.35 ug/L 92 70 - 135 Dibromomethane 20.0 19.74 ug/L 99 75 - 130 1,2-Dichlorobenzene 20.0 19.97 ug/L 100 65 - 135 1,3-Dichlorobenzene 20.0 19.11 ug/L 96 70 - 130 1,4-Dichlorobenzene 20.0 19.95 ug/L 100 60 - 140 1,1-Dichloroethane 20.0 20.26 ug/L 101 60 - 130 1,2-Dichloroethane 20.0 19.24 ug/L 96 65 - 140 1,1-Dichloroethene 20.0 21.66 ug/L 108 60 - 135

TestAmerica Cedar Falls

Page 66 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-108840/5 Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108840 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits cis-1,2-Dichloroethene 20.0 19.98 ug/L 100 70 - 135 6 trans-1,2-Dichloroethene 20.0 21.34 ug/L 107 60 - 145 1,2-Dichloropropane 20.0 19.65 ug/L 98 65 - 130 7 1,3-Dichloropropane 20.0 19.05 ug/L 95 75 - 125 2,2-Dichloropropane 20.0 23.01 ug/L 115 25 - 120 8 1,1-Dichloropropene 20.0 21.91 ug/L 110 60 - 140 cis-1,3-Dichloropropene 20.0 17.96 ug/L 90 30 - 120 9 trans-1,3-Dichloropropene 20.0 16.91 ug/L 85 35 - 120 Ethylbenzene 20.0 20.05 ug/L 100 70 - 130 10 Hexachlorobutadiene 20.0 21.16 ug/L 106 60 - 135 Hexane 20.0 23.68 ug/L 118 40 - 135 Isopropylbenzene 20.0 19.90 ug/L 100 70 - 125 11 p-Isopropyltoluene 20.0 21.14 ug/L 106 60 - 140 Methylene Chloride 20.0 20.36 ug/L 102 55 - 145 12 Methyl tert-butyl ether 20.0 19.08 ug/L 95 50 - 135 Naphthalene 20.0 19.00 ug/L 95 40 - 135 13 N-Propylbenzene 20.0 20.17 ug/L 101 70 - 135 Styrene 20.0 18.95 ug/L 95 70 - 130 14 1,1,1,2-Tetrachloroethane 20.0 18.67 ug/L 93 65 - 120 1,1,2,2-Tetrachloroethane 20.0 18.04 ug/L 90 65 - 130 15 Tetrachloroethene 20.0 18.36 ug/L 92 70 - 135 Toluene 20.0 20.46 ug/L 102 70 - 135 1,2,3-Trichlorobenzene 20.0 20.28 ug/L 101 55 - 130 1,2,4-Trichlorobenzene 20.0 20.81 ug/L 104 40 - 135 1,1,1-Trichloroethane 20.0 21.41 ug/L 107 60 - 125 1,1,2-Trichloroethane 20.0 19.04 ug/L 95 75 - 125 Trichloroethene 20.0 19.36 ug/L 97 70 - 130 1,2,3-Trichloropropane 20.0 17.88 ug/L 89 60 - 150 1,2,4-Trimethylbenzene 20.0 20.10 ug/L 100 70 - 140 1,3,5-Trimethylbenzene 20.0 19.95 ug/L 100 70 - 140 Xylenes, Total 40.0 40.27 ug/L 101 70 - 130

LCS LCS Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 99 75 - 120 Dibromofluoromethane (Surr) 100 75 - 120 Toluene-d8 (Surr) 98 80 - 120

Lab Sample ID: 310-68446-7 MS Client Sample ID: B-2E Matrix: Ground Water Prep Type: Total/NA Analysis Batch: 108840 Sample Sample Spike MS MS %Rec. Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Acetone <10.0 40.0 33.01 ug/L 83 45 - 150 Benzene <0.500 20.0 19.38 ug/L 97 50 - 130 Bromobenzene <1.00 20.0 17.74 ug/L 89 60 - 135 Bromochloromethane <5.00 20.0 19.75 ug/L 99 55 - 145 Bromodichloromethane <1.00 20.0 16.41 ug/L 82 50 - 130 Bromoform <5.00 20.0 14.38 ug/L 72 30 - 125

TestAmerica Cedar Falls

Page 67 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: 310-68446-7 MS Client Sample ID: B-2E Matrix: Ground Water Prep Type: Total/NA 4 Analysis Batch: 108840 Sample Sample Spike MS MS %Rec. 5 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 2-Butanone (MEK) <10.0 40.0 37.32 ug/L 93 45 - 140 6 n-Butylbenzene <1.00 20.0 16.15 ug/L 81 40 - 135 sec-Butylbenzene <1.00 20.0 16.66 ug/L 83 40 - 135 7 tert-Butylbenzene <1.00 20.0 17.38 ug/L 87 40 - 135 Carbon disulfide <1.00 20.0 21.55 ug/L 108 30 - 130 8 Carbon tetrachloride <2.00 20.0 19.07 ug/L 95 35 - 130 Chlorobenzene <1.00 20.0 19.25 ug/L 96 60 - 130 9 Chlorodibromomethane <5.00 20.0 15.09 ug/L 75 35 - 130 Chloroform <1.00 20.0 19.42 ug/L 97 55 - 125 10 2-Chlorotoluene <1.00 20.0 17.45 ug/L 87 55 - 140 4-Chlorotoluene <1.00 20.0 16.55 ug/L 83 50 - 140 1,2-Dibromo-3-Chloropropane <10.0 20.0 14.76 ug/L 74 35 - 130 11 1,2-Dibromoethane (EDB) <10.0 20.0 17.70 ug/L 88 55 - 140 Dibromomethane <1.00 20.0 18.82 ug/L 94 60 - 135 12 1,2-Dichlorobenzene <1.00 20.0 18.47 ug/L 92 55 - 140 1,3-Dichlorobenzene <1.00 20.0 16.49 ug/L 82 55 - 135 13 1,4-Dichlorobenzene <1.00 20.0 17.94 ug/L 90 55 - 140 1,1-Dichloroethane <1.00 20.0 19.59 ug/L 98 50 - 130 14 1,2-Dichloroethane <1.00 20.0 19.57 ug/L 98 55 - 140 1,1-Dichloroethene <2.00 20.0 20.78 ug/L 104 35 - 135 15 cis-1,2-Dichloroethene <1.00 20.0 19.68 ug/L 98 45 - 135 trans-1,2-Dichloroethene <1.00 20.0 21.09 ug/L 105 45 - 145 1,2-Dichloropropane <1.00 20.0 18.51 ug/L 93 55 - 130 1,3-Dichloropropane <1.00 20.0 18.59 ug/L 93 60 - 135 2,2-Dichloropropane <4.00 20.0 16.71 ug/L 84 20 - 120 1,1-Dichloropropene <1.00 20.0 19.97 ug/L 100 40 - 140 cis-1,3-Dichloropropene <5.00 20.0 16.21 ug/L 81 25 - 120 trans-1,3-Dichloropropene <5.00 20.0 14.94 ug/L 75 25 - 120 Ethylbenzene <1.00 20.0 18.26 ug/L 90 45 - 135 Hexachlorobutadiene <5.00 20.0 16.11 ug/L 81 40 - 135 Hexane <1.00 20.0 14.30 ug/L 72 25 - 135 Isopropylbenzene <1.00 20.0 17.52 ug/L 88 45 - 125 p-Isopropyltoluene <1.00 20.0 17.46 ug/L 87 40 - 140 Methylene Chloride <5.00 20.0 20.39 ug/L 101 45 - 145 Methyl tert-butyl ether <1.00 20.0 18.88 ug/L 94 40 - 135 Naphthalene <5.00 20.0 16.41 ug/L 82 40 - 135 N-Propylbenzene <1.00 20.0 17.45 ug/L 87 45 - 140 Styrene <1.00 F1 20.0 6.635 F1 ug/L 33 40 - 135 1,1,1,2-Tetrachloroethane <1.00 20.0 18.30 ug/L 91 50 - 130 1,1,2,2-Tetrachloroethane <1.00 20.0 17.51 ug/L 88 55 - 140 Tetrachloroethene <1.00 20.0 16.58 ug/L 83 40 - 135 Toluene <1.00 20.0 19.61 ug/L 96 45 - 135 1,2,3-Trichlorobenzene <5.00 20.0 16.24 ug/L 81 50 - 140 1,2,4-Trichlorobenzene <5.00 20.0 16.28 ug/L 81 40 - 135 1,1,1-Trichloroethane <1.00 20.0 19.72 ug/L 99 40 - 125 1,1,2-Trichloroethane <1.00 20.0 18.80 ug/L 94 60 - 130 Trichloroethene <1.00 20.0 19.32 ug/L 97 50 - 130 1,2,3-Trichloropropane <1.00 20.0 16.40 ug/L 82 55 - 150

TestAmerica Cedar Falls

Page 68 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: 310-68446-7 MS Client Sample ID: B-2E Matrix: Ground Water Prep Type: Total/NA 4 Analysis Batch: 108840 Sample Sample Spike MS MS %Rec. 5 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits 1,2,4-Trimethylbenzene <1.00 20.0 16.40 ug/L 82 45 - 140 6 1,3,5-Trimethylbenzene <1.00 20.0 16.14 ug/L 81 45 - 140 Xylenes, Total <3.00 40.0 36.48 ug/L 91 40 - 135 7 MS MS Surrogate %Recovery Qualifier Limits 8 4-Bromofluorobenzene (Surr) 102 75 - 120 Dibromofluoromethane (Surr) 99 75 - 120 9 Toluene-d8 (Surr) 93 80 - 120 10 Lab Sample ID: 310-68446-7 MSD Client Sample ID: B-2E Matrix: Ground Water Prep Type: Total/NA 11 Analysis Batch: 108840 Sample Sample Spike MSD MSD %Rec. RPD 12 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone <10.0 40.0 33.83 ug/L 85 45 - 150 2 20 13 Benzene <0.500 20.0 19.49 ug/L 97 50 - 130 1 20 Bromobenzene <1.00 20.0 17.08 ug/L 85 60 - 135 4 20 Bromochloromethane <5.00 20.0 19.68 ug/L 98 55 - 145 0 20 14 Bromodichloromethane <1.00 20.0 17.24 ug/L 86 50 - 130 5 20 Bromoform <5.00 20.0 13.36 ug/L 67 30 - 125 7 20 15 2-Butanone (MEK) <10.0 40.0 34.11 ug/L 85 45 - 140 9 20 n-Butylbenzene <1.00 20.0 15.12 ug/L 76 40 - 135 7 20 sec-Butylbenzene <1.00 20.0 16.51 ug/L 83 40 - 135 1 15 tert-Butylbenzene <1.00 20.0 16.95 ug/L 85 40 - 135 3 15 Carbon disulfide <1.00 20.0 18.42 ug/L 92 30 - 130 16 20 Carbon tetrachloride <2.00 20.0 17.67 ug/L 88 35 - 130 8 20 Chlorobenzene <1.00 20.0 18.35 ug/L 92 60 - 130 5 20 Chlorodibromomethane <5.00 20.0 15.52 ug/L 78 35 - 130 3 20 Chloroform <1.00 20.0 18.92 ug/L 95 55 - 125 3 20 2-Chlorotoluene <1.00 20.0 17.52 ug/L 88 55 - 140 0 20 4-Chlorotoluene <1.00 20.0 16.07 ug/L 80 50 - 140 3 20 1,2-Dibromo-3-Chloropropane <10.0 20.0 15.17 ug/L 76 35 - 130 3 20 1,2-Dibromoethane (EDB) <10.0 20.0 18.72 ug/L 94 55 - 140 6 20 Dibromomethane <1.00 20.0 17.13 ug/L 86 60 - 135 9 20 1,2-Dichlorobenzene <1.00 20.0 17.03 ug/L 85 55 - 140 8 20 1,3-Dichlorobenzene <1.00 20.0 16.41 ug/L 82 55 - 135 0 20 1,4-Dichlorobenzene <1.00 20.0 16.21 ug/L 81 55 - 140 10 20 1,1-Dichloroethane <1.00 20.0 19.49 ug/L 97 50 - 130 1 20 1,2-Dichloroethane <1.00 20.0 17.79 ug/L 89 55 - 140 10 20 1,1-Dichloroethene <2.00 20.0 20.29 ug/L 101 35 - 135 2 20 cis-1,2-Dichloroethene <1.00 20.0 19.56 ug/L 98 45 - 135 1 20 trans-1,2-Dichloroethene <1.00 20.0 19.08 ug/L 95 45 - 145 10 20 1,2-Dichloropropane <1.00 20.0 18.80 ug/L 94 55 - 130 2 20 1,3-Dichloropropane <1.00 20.0 18.10 ug/L 90 60 - 135 3 20 2,2-Dichloropropane <4.00 20.0 16.93 ug/L 85 20 - 120 1 20 1,1-Dichloropropene <1.00 20.0 19.98 ug/L 100 40 - 140 0 20 cis-1,3-Dichloropropene <5.00 20.0 16.56 ug/L 83 25 - 120 2 20 trans-1,3-Dichloropropene <5.00 20.0 15.08 ug/L 75 25 - 120 1 20

TestAmerica Cedar Falls

Page 69 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: 310-68446-7 MSD Client Sample ID: B-2E Matrix: Ground Water Prep Type: Total/NA 4 Analysis Batch: 108840 Sample Sample Spike MSD MSD %Rec. RPD 5 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit Ethylbenzene <1.00 20.0 17.55 ug/L 87 45 - 135 4 20 6 Hexachlorobutadiene <5.00 20.0 13.22 ug/L 66 40 - 135 20 20 Hexane <1.00 20.0 13.11 ug/L 66 25 - 135 9 20 7 Isopropylbenzene <1.00 20.0 17.16 ug/L 86 45 - 125 2 20 p-Isopropyltoluene <1.00 20.0 16.18 ug/L 81 40 - 140 8 20 8 Methylene Chloride <5.00 20.0 19.46 ug/L 96 45 - 145 5 20 Methyl tert-butyl ether <1.00 20.0 17.75 ug/L 89 40 - 135 6 20 9 Naphthalene <5.00 20.0 15.69 ug/L 78 40 - 135 5 20 N-Propylbenzene <1.00 20.0 16.59 ug/L 83 45 - 140 5 20 10 Styrene <1.00 F1 20.0 6.257 F1 ug/L 31 40 - 135 6 20 1,1,1,2-Tetrachloroethane <1.00 20.0 16.99 ug/L 85 50 - 130 7 20 1,1,2,2-Tetrachloroethane <1.00 20.0 15.72 ug/L 79 55 - 140 11 20 11 Tetrachloroethene <1.00 20.0 16.50 ug/L 82 40 - 135 0 20 Toluene <1.00 20.0 18.55 ug/L 91 45 - 135 6 20 12 1,2,3-Trichlorobenzene <5.00 20.0 16.00 ug/L 80 50 - 140 2 20 1,2,4-Trichlorobenzene <5.00 20.0 14.99 ug/L 75 40 - 135 8 20 13 1,1,1-Trichloroethane <1.00 20.0 20.13 ug/L 101 40 - 125 2 20 1,1,2-Trichloroethane <1.00 20.0 16.87 ug/L 84 60 - 130 11 20 14 Trichloroethene <1.00 20.0 19.44 ug/L 97 50 - 130 1 20 1,2,3-Trichloropropane <1.00 20.0 15.92 ug/L 80 55 - 150 3 20 15 1,2,4-Trimethylbenzene <1.00 20.0 16.57 ug/L 83 45 - 140 1 20 1,3,5-Trimethylbenzene <1.00 20.0 15.93 ug/L 80 45 - 140 1 20 Xylenes, Total <3.00 40.0 35.62 ug/L 89 40 - 135 2 20

MSD MSD Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 102 75 - 120 Dibromofluoromethane (Surr) 103 75 - 120 Toluene-d8 (Surr) 100 80 - 120

Lab Sample ID: MB 310-109058/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 109055 Prep Batch: 109058 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone <496 496 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Benzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Bromobenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Bromochloromethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Bromodichloromethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Bromoform <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Bromomethane <496 496 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 2-Butanone (MEK) <248 248 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 n-Butylbenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 sec-Butylbenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 tert-Butylbenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Carbon disulfide <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Carbon tetrachloride <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Chlorobenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1

TestAmerica Cedar Falls

Page 70 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-109058/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 109055 Prep Batch: 109058 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Chlorodibromomethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 6 Chloroethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Chloroform <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 7 Chloromethane <248 248 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 2-Chlorotoluene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 8 4-Chlorotoluene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,2-Dibromo-3-Chloropropane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 9 1,2-Dibromoethane (EDB) <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Dibromomethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 10 1,2-Dichlorobenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,3-Dichlorobenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,4-Dichlorobenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 11 Dichlorodifluoromethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,1-Dichloroethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 12 1,2-Dichloroethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,1-Dichloroethene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 13 cis-1,2-Dichloroethene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 trans-1,2-Dichloroethene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 14 1,2-Dichloropropane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,3-Dichloropropane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 15 2,2-Dichloropropane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,1-Dichloropropene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 cis-1,3-Dichloropropene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 trans-1,3-Dichloropropene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Ethylbenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Hexachlorobutadiene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Hexane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Isopropylbenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 p-Isopropyltoluene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Methylene Chloride <248 248 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Methyl tert-butyl ether <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Naphthalene <248 248 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 N-Propylbenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Styrene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,1,1,2-Tetrachloroethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,1,2,2-Tetrachloroethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Tetrachloroethene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Toluene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,2,3-Trichlorobenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,2,4-Trichlorobenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,1,1-Trichloroethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,1,2-Trichloroethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Trichloroethene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Trichlorofluoromethane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,2,3-Trichloropropane <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,2,4-Trimethylbenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 1,3,5-Trimethylbenzene <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 Vinyl chloride <99.3 99.3 ug/Kg 11/17/15 07:37 11/17/15 08:47 1

TestAmerica Cedar Falls

Page 71 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-109058/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 109055 Prep Batch: 109058 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Xylenes, Total <149 149 ug/Kg 11/17/15 07:37 11/17/15 08:47 1 6

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 7 4-Bromofluorobenzene (Surr) 98 80 - 120 11/17/15 07:37 11/17/15 08:47 1 Dibromofluoromethane (Surr) 98 75 - 125 11/17/15 07:37 11/17/15 08:47 1 8 Toluene-d8 (Surr) 99 80 120 11/17/15 07:37 11/17/15 08:47 1 - 9 Lab Sample ID: LCS 310-109058/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 10 Analysis Batch: 109055 Prep Batch: 109058 Spike LCS LCS %Rec. 11 Analyte Added Result Qualifier Unit D %Rec Limits Acetone 1980 1644 ug/Kg 83 65 - 150 12 Benzene 992 958.6 ug/Kg 97 55 - 135 Bromobenzene 992 890.8 ug/Kg 90 65 - 125 13 Bromochloromethane 992 859.3 ug/Kg 87 65 - 130 Bromodichloromethane 992 876.4 ug/Kg 88 65 - 130 Bromoform 992 926.8 ug/Kg 93 50 - 135 14 2-Butanone (MEK) 1980 1655 ug/Kg 83 50 - 145 n-Butylbenzene 992 937.6 ug/Kg 94 55 - 130 15 sec-Butylbenzene 992 959.1 ug/Kg 97 60 - 125 tert-Butylbenzene 992 933.8 ug/Kg 94 55 - 125 Carbon disulfide 992 920.4 ug/Kg 93 40 - 135 Carbon tetrachloride 992 939.2 ug/Kg 95 55 - 130 Chlorobenzene 992 938.6 ug/Kg 95 60 - 120 Chlorodibromomethane 992 1016 ug/Kg 102 55 - 130 Chloroform 992 938.6 ug/Kg 95 65 - 130 2-Chlorotoluene 992 922.2 ug/Kg 93 60 - 125 4-Chlorotoluene 992 945.2 ug/Kg 95 60 - 125 1,2-Dibromo-3-Chloropropane 992 717.8 ug/Kg 72 50 - 140 1,2-Dibromoethane (EDB) 992 883.0 ug/Kg 89 55 - 140 Dibromomethane 992 914.5 ug/Kg 92 65 - 135 1,2-Dichlorobenzene 992 892.6 ug/Kg 90 65 - 120 1,3-Dichlorobenzene 992 925.9 ug/Kg 93 60 - 125 1,4-Dichlorobenzene 992 895.8 ug/Kg 90 60 - 125 1,1-Dichloroethane 992 954.5 ug/Kg 96 55 - 135 1,2-Dichloroethane 992 897.8 ug/Kg 90 60 - 140 1,1-Dichloroethene 992 902.2 ug/Kg 91 50 - 145 cis-1,2-Dichloroethene 992 937.6 ug/Kg 94 60 - 135 trans-1,2-Dichloroethene 992 973.6 ug/Kg 98 55 - 135 1,2-Dichloropropane 992 927.2 ug/Kg 93 55 - 130 1,3-Dichloropropane 992 900.7 ug/Kg 91 55 - 140 2,2-Dichloropropane 992 1082 ug/Kg 109 40 - 135 1,1-Dichloropropene 992 946.9 ug/Kg 95 55 - 130 cis-1,3-Dichloropropene 992 915.0 ug/Kg 92 50 - 115 trans-1,3-Dichloropropene 992 890.8 ug/Kg 90 55 - 130 Ethylbenzene 992 970.0 ug/Kg 98 60 - 125 Hexachlorobutadiene 992 942.7 ug/Kg 95 40 - 135

TestAmerica Cedar Falls

Page 72 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-109058/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 109055 Prep Batch: 109058 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Hexane 992 1078 ug/Kg 109 45 - 140 6 Isopropylbenzene 992 956.9 ug/Kg 96 60 - 125 p-Isopropyltoluene 992 942.1 ug/Kg 95 60 - 120 7 Methylene Chloride 992 981.4 ug/Kg 99 55 - 145 Methyl tert-butyl ether 992 897.1 ug/Kg 90 55 - 130 8 Naphthalene 992 829.5 ug/Kg 84 50 - 130 N-Propylbenzene 992 956.4 ug/Kg 96 50 - 125 9 Styrene 992 914.3 ug/Kg 92 60 - 125 1,1,1,2-Tetrachloroethane 992 875.8 ug/Kg 88 65 - 125 10 1,1,2,2-Tetrachloroethane 992 836.5 ug/Kg 84 60 - 125 Tetrachloroethene 992 935.7 ug/Kg 94 55 - 125 Toluene 992 970.2 ug/Kg 98 60 - 130 11 1,2,3-Trichlorobenzene 992 862.1 ug/Kg 87 50 - 130 1,2,4-Trichlorobenzene 992 895.4 ug/Kg 90 45 - 135 12 1,1,1-Trichloroethane 992 959.8 ug/Kg 97 60 - 125 1,1,2-Trichloroethane 992 893.3 ug/Kg 90 55 - 135 13 Trichloroethene 992 937.1 ug/Kg 94 60 - 130 1,2,3-Trichloropropane 992 850.1 ug/Kg 86 50 - 145 14 1,2,4-Trimethylbenzene 992 904.0 ug/Kg 91 55 - 125 1,3,5-Trimethylbenzene 992 947.0 ug/Kg 95 50 - 130 15 Xylenes, Total 1980 1874 ug/Kg 94 50 - 130

LCS LCS Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 98 80 - 120 Dibromofluoromethane (Surr) 100 75 - 125 Toluene-d8 (Surr) 99 80 - 120

Lab Sample ID: LCSD 310-109058/3-A Client Sample ID: Lab Control Sample Dup Matrix: Solid Prep Type: Total/NA Analysis Batch: 109055 Prep Batch: 109058 Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone 1900 1733 ug/Kg 91 65 - 150 5 40 Benzene 952 922.4 ug/Kg 97 55 - 135 4 25 Bromobenzene 952 866.6 ug/Kg 91 65 - 125 3 35 Bromochloromethane 952 888.9 ug/Kg 93 65 - 130 3 35 Bromodichloromethane 952 829.2 ug/Kg 87 65 - 130 6 30 Bromoform 952 967.8 ug/Kg 102 50 - 135 4 40 2-Butanone (MEK) 1900 1749 ug/Kg 92 50 - 145 6 40 n-Butylbenzene 952 891.8 ug/Kg 94 55 - 130 5 30 sec-Butylbenzene 952 921.4 ug/Kg 97 60 - 125 4 30 tert-Butylbenzene 952 896.4 ug/Kg 94 55 - 125 4 25 Carbon disulfide 952 869.8 ug/Kg 91 40 - 135 6 40 Carbon tetrachloride 952 892.5 ug/Kg 94 55 - 130 5 30 Chlorobenzene 952 928.8 ug/Kg 98 60 - 120 1 30 Chlorodibromomethane 952 1036 ug/Kg 109 55 - 130 2 40 Chloroform 952 896.4 ug/Kg 94 65 - 130 5 30 2-Chlorotoluene 952 901.4 ug/Kg 95 60 - 125 2 35

TestAmerica Cedar Falls

Page 73 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCSD 310-109058/3-A Client Sample ID: Lab Control Sample Dup Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 109055 Prep Batch: 109058 Spike LCSD LCSD %Rec. RPD 5 Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 4-Chlorotoluene 952 907.0 ug/Kg 95 60 - 125 4 35 6 1,2-Dibromo-3-Chloropropane 952 768.4 ug/Kg 81 50 - 140 7 35 1,2-Dibromoethane (EDB) 952 875.4 ug/Kg 92 55 - 140 1 30 7 Dibromomethane 952 874.5 ug/Kg 92 65 - 135 4 30 1,2-Dichlorobenzene 952 861.1 ug/Kg 90 65 - 120 4 30 8 1,3-Dichlorobenzene 952 869.0 ug/Kg 91 60 - 125 6 30 1,4-Dichlorobenzene 952 876.2 ug/Kg 92 60 - 125 2 30 9 1,1-Dichloroethane 952 910.7 ug/Kg 96 55 - 135 5 40 1,2-Dichloroethane 952 902.6 ug/Kg 95 60 - 140 1 30 10 1,1-Dichloroethene 952 864.3 ug/Kg 91 50 - 145 4 40 cis-1,2-Dichloroethene 952 899.3 ug/Kg 94 60 - 135 4 40 trans-1,2-Dichloroethene 952 934.0 ug/Kg 98 55 - 135 4 40 11 1,2-Dichloropropane 952 863.6 ug/Kg 91 55 - 130 7 30 1,3-Dichloropropane 952 881.2 ug/Kg 93 55 - 140 2 30 12 2,2-Dichloropropane 952 965.7 ug/Kg 101 40 - 135 11 45 1,1-Dichloropropene 952 869.6 ug/Kg 91 55 - 130 9 30 13 cis-1,3-Dichloropropene 952 921.7 ug/Kg 97 50 - 115 1 35 trans-1,3-Dichloropropene 952 879.6 ug/Kg 92 55 - 130 1 30 14 Ethylbenzene 952 939.0 ug/Kg 99 60 - 125 3 30 Hexachlorobutadiene 952 851.4 ug/Kg 89 40 - 135 10 35 15 Hexane 952 1010 ug/Kg 106 45 - 140 7 35 Isopropylbenzene 952 917.9 ug/Kg 96 60 - 125 4 35 p-Isopropyltoluene 952 918.0 ug/Kg 96 60 - 120 3 30 Methylene Chloride 952 999.5 ug/Kg 105 55 - 145 2 40 Methyl tert-butyl ether 952 911.7 ug/Kg 96 55 - 130 2 30 Naphthalene 952 870.0 ug/Kg 91 50 - 130 5 30 N-Propylbenzene 952 911.4 ug/Kg 96 50 - 125 5 35 Styrene 952 868.7 ug/Kg 91 60 - 125 5 35 1,1,1,2-Tetrachloroethane 952 902.1 ug/Kg 95 65 - 125 3 30 1,1,2,2-Tetrachloroethane 952 868.2 ug/Kg 91 60 - 125 4 35 Tetrachloroethene 952 849.2 ug/Kg 89 55 - 125 10 40 Toluene 952 936.7 ug/Kg 98 60 - 130 4 35 1,2,3-Trichlorobenzene 952 877.0 ug/Kg 92 50 - 130 2 35 1,2,4-Trichlorobenzene 952 886.5 ug/Kg 93 45 - 135 1 35 1,1,1-Trichloroethane 952 925.8 ug/Kg 97 60 - 125 4 30 1,1,2-Trichloroethane 952 897.3 ug/Kg 94 55 - 135 0 30 Trichloroethene 952 886.3 ug/Kg 93 60 - 130 6 30 1,2,3-Trichloropropane 952 897.7 ug/Kg 94 50 - 145 5 35 1,2,4-Trimethylbenzene 952 904.1 ug/Kg 95 55 - 125 0 35 1,3,5-Trimethylbenzene 952 899.0 ug/Kg 94 50 - 130 5 35 Xylenes, Total 1900 1754 ug/Kg 92 50 - 130 7 30

LCSD LCSD Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 100 80 - 120 Dibromofluoromethane (Surr) 99 75 - 125 Toluene-d8 (Surr) 101 80 - 120

TestAmerica Cedar Falls

Page 74 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-109247/1-A Client Sample ID: Method Blank 4 Matrix: Solid Prep Type: Total/NA Analysis Batch: 109250 Prep Batch: 109247 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acetone <464 464 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 6 Benzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Bromobenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 7 Bromochloromethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Bromodichloromethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 8 Bromoform <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Bromomethane <464 464 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 9 2-Butanone (MEK) <232 232 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 n-Butylbenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 10 sec-Butylbenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 tert-Butylbenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 11 Carbon disulfide <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Carbon tetrachloride <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 12 Chlorobenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Chlorodibromomethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Chloroethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 13 Chloroform <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Chloromethane <232 232 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 14 2-Chlorotoluene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 4-Chlorotoluene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 15 1,2-Dibromo-3-Chloropropane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,2-Dibromoethane (EDB) <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Dibromomethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,2-Dichlorobenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,3-Dichlorobenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,4-Dichlorobenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Dichlorodifluoromethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,1-Dichloroethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,2-Dichloroethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,1-Dichloroethene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 cis-1,2-Dichloroethene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 trans-1,2-Dichloroethene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,2-Dichloropropane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,3-Dichloropropane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 2,2-Dichloropropane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,1-Dichloropropene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 cis-1,3-Dichloropropene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 trans-1,3-Dichloropropene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Ethylbenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Hexachlorobutadiene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Hexane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Isopropylbenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 p-Isopropyltoluene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Methylene Chloride <232 232 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Methyl tert-butyl ether <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Naphthalene <232 232 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 N-Propylbenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Styrene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1

TestAmerica Cedar Falls

Page 75 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: MB 310-109247/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 109250 Prep Batch: 109247 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 1,1,1,2-Tetrachloroethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 6 1,1,2,2-Tetrachloroethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Tetrachloroethene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 7 Toluene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,2,3-Trichlorobenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 8 1,2,4-Trichlorobenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,1,1-Trichloroethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 9 1,1,2-Trichloroethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Trichloroethene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 10 Trichlorofluoromethane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,2,3-Trichloropropane <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 1,2,4-Trimethylbenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 11 1,3,5-Trimethylbenzene <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 Vinyl chloride <92.9 92.9 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 12 Xylenes, Total <139 139 ug/Kg 11/18/15 07:48 11/18/15 11:19 1 13 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 14 4-Bromofluorobenzene (Surr) 99 80 - 120 11/18/15 07:48 11/18/15 11:19 1 Dibromofluoromethane (Surr) 94 75 - 125 11/18/15 07:48 11/18/15 11:19 1 Toluene-d8 (Surr) 98 80 - 120 11/18/15 07:48 11/18/15 11:19 1 15

Lab Sample ID: LCS 310-109247/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 109250 Prep Batch: 109247 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Acetone 1920 2241 ug/Kg 117 65 - 150 Benzene 960 1232 ug/Kg 128 55 - 135 Bromobenzene 960 1145 ug/Kg 119 65 - 125 Bromochloromethane 960 1165 ug/Kg 121 65 - 130 Bromodichloromethane 960 1095 ug/Kg 114 65 - 130 Bromoform 960 1202 ug/Kg 125 50 - 135 2-Butanone (MEK) 1920 2193 ug/Kg 114 50 - 145 n-Butylbenzene 960 1141 ug/Kg 119 55 - 130 sec-Butylbenzene 960 1160 ug/Kg 121 60 - 125 tert-Butylbenzene 960 1140 ug/Kg 119 55 - 125 Carbon disulfide 960 920.2 ug/Kg 96 40 - 135 Carbon tetrachloride 960 1064 ug/Kg 111 55 - 130 Chlorobenzene 960 1184 * ug/Kg 123 60 - 120 Chlorodibromomethane 960 1272 * ug/Kg 133 55 - 130 Chloroform 960 1224 ug/Kg 128 65 - 130 2-Chlorotoluene 960 1124 ug/Kg 117 60 - 125 4-Chlorotoluene 960 1147 ug/Kg 120 60 - 125 1,2-Dibromo-3-Chloropropane 960 912.6 ug/Kg 95 50 - 140 1,2-Dibromoethane (EDB) 960 1184 ug/Kg 123 55 - 140 Dibromomethane 960 1195 ug/Kg 124 65 - 135 1,2-Dichlorobenzene 960 1122 ug/Kg 117 65 - 120 1,3-Dichlorobenzene 960 1152 ug/Kg 120 60 - 125

TestAmerica Cedar Falls

Page 76 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCS 310-109247/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 109250 Prep Batch: 109247 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits 1,4-Dichlorobenzene 960 1115 ug/Kg 116 60 - 125 6 1,1-Dichloroethane 960 1157 ug/Kg 121 55 - 135 1,2-Dichloroethane 960 1195 ug/Kg 125 60 - 140 7 1,1-Dichloroethene 960 1048 ug/Kg 109 50 - 145 cis-1,2-Dichloroethene 960 1226 ug/Kg 128 60 - 135 8 trans-1,2-Dichloroethene 960 1144 ug/Kg 119 55 - 135 1,2-Dichloropropane 960 1189 ug/Kg 124 55 - 130 9 1,3-Dichloropropane 960 1143 ug/Kg 119 55 - 140 2,2-Dichloropropane 960 1230 ug/Kg 128 40 - 135 10 1,1-Dichloropropene 960 1179 ug/Kg 123 55 - 130 cis-1,3-Dichloropropene 960 1154 * ug/Kg 120 50 - 115 trans-1,3-Dichloropropene 960 1130 ug/Kg 118 55 - 130 11 Ethylbenzene 960 1197 ug/Kg 125 60 - 125 Hexachlorobutadiene 960 1087 ug/Kg 113 40 - 135 12 Hexane 960 643.9 ug/Kg 67 45 - 140 Isopropylbenzene 960 1184 ug/Kg 123 60 - 125 13 p-Isopropyltoluene 960 1168 * ug/Kg 122 60 - 120 Methylene Chloride 960 1156 ug/Kg 120 55 - 145 14 Methyl tert-butyl ether 960 1253 * ug/Kg 131 55 - 130 Naphthalene 960 1173 ug/Kg 122 50 - 130 15 N-Propylbenzene 960 1163 ug/Kg 121 50 - 125 Styrene 960 1160 ug/Kg 121 60 - 125 1,1,1,2-Tetrachloroethane 960 1106 ug/Kg 115 65 - 125 1,1,2,2-Tetrachloroethane 960 1133 ug/Kg 118 60 - 125 Tetrachloroethene 960 1099 ug/Kg 114 55 - 125 Toluene 960 1185 ug/Kg 124 60 - 130 1,2,3-Trichlorobenzene 960 1185 ug/Kg 123 50 - 130 1,2,4-Trichlorobenzene 960 1163 ug/Kg 121 45 - 135 1,1,1-Trichloroethane 960 1167 ug/Kg 122 60 - 125 1,1,2-Trichloroethane 960 1189 ug/Kg 124 55 - 135 Trichloroethene 960 1168 ug/Kg 122 60 - 130 1,2,3-Trichloropropane 960 1120 ug/Kg 117 50 - 145 1,2,4-Trimethylbenzene 960 1141 ug/Kg 119 55 - 125 1,3,5-Trimethylbenzene 960 1155 ug/Kg 120 50 - 130 Xylenes, Total 1920 2323 ug/Kg 121 50 - 130

LCS LCS Surrogate %Recovery Qualifier Limits 4-Bromofluorobenzene (Surr) 99 80 - 120 Dibromofluoromethane (Surr) 102 75 - 125 Toluene-d8 (Surr) 99 80 - 120

Lab Sample ID: LCSD 310-109247/3-A Client Sample ID: Lab Control Sample Dup Matrix: Solid Prep Type: Total/NA Analysis Batch: 109250 Prep Batch: 109247 Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Acetone 1980 2225 ug/Kg 112 65 - 150 1 40 Benzene 991 1259 ug/Kg 127 55 - 135 2 25

TestAmerica Cedar Falls

Page 77 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCSD 310-109247/3-A Client Sample ID: Lab Control Sample Dup Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 109250 Prep Batch: 109247 Spike LCSD LCSD %Rec. RPD 5 Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Bromobenzene 991 1208 ug/Kg 122 65 - 125 5 35 6 Bromochloromethane 991 1198 ug/Kg 121 65 - 130 3 35 Bromodichloromethane 991 1116 ug/Kg 113 65 - 130 2 30 7 Bromoform 991 1302 ug/Kg 131 50 - 135 8 40 2-Butanone (MEK) 1980 2203 ug/Kg 111 50 - 145 0 40 8 n-Butylbenzene 991 1185 ug/Kg 120 55 - 130 4 30 sec-Butylbenzene 991 1207 ug/Kg 122 60 - 125 4 30 9 tert-Butylbenzene 991 1168 ug/Kg 118 55 - 125 2 25 Carbon disulfide 991 999.7 ug/Kg 101 40 - 135 8 40 10 Carbon tetrachloride 991 1186 ug/Kg 120 55 - 130 11 30 Chlorobenzene 991 1247 * ug/Kg 126 60 - 120 5 30 Chlorodibromomethane 991 1340 * ug/Kg 135 55 - 130 5 40 11 Chloroform 991 1230 ug/Kg 124 65 - 130 0 30 2-Chlorotoluene 991 1158 ug/Kg 117 60 - 125 3 35 12 4-Chlorotoluene 991 1163 ug/Kg 117 60 - 125 1 35 1,2-Dibromo-3-Chloropropane 991 921.5 ug/Kg 93 50 - 140 1 35 13 1,2-Dibromoethane (EDB) 991 1208 ug/Kg 122 55 - 140 2 30 Dibromomethane 991 1241 ug/Kg 125 65 - 135 4 30 14 1,2-Dichlorobenzene 991 1126 ug/Kg 114 65 - 120 0 30 1,3-Dichlorobenzene 991 1166 ug/Kg 118 60 - 125 1 30 15 1,4-Dichlorobenzene 991 1128 ug/Kg 114 60 - 125 1 30 1,1-Dichloroethane 991 1188 ug/Kg 120 55 - 135 3 40 1,2-Dichloroethane 991 1190 ug/Kg 120 60 - 140 0 30 1,1-Dichloroethene 991 1175 ug/Kg 119 50 - 145 11 40 cis-1,2-Dichloroethene 991 1218 ug/Kg 123 60 - 135 1 40 trans-1,2-Dichloroethene 991 1214 ug/Kg 122 55 - 135 6 40 1,2-Dichloropropane 991 1186 ug/Kg 120 55 - 130 0 30 1,3-Dichloropropane 991 1196 ug/Kg 121 55 - 140 5 30 2,2-Dichloropropane 991 1314 ug/Kg 133 40 - 135 7 45 1,1-Dichloropropene 991 1201 ug/Kg 121 55 - 130 2 30 cis-1,3-Dichloropropene 991 1216 * ug/Kg 123 50 - 115 5 35 trans-1,3-Dichloropropene 991 1152 ug/Kg 116 55 - 130 2 30 Ethylbenzene 991 1266 * ug/Kg 128 60 - 125 6 30 Hexachlorobutadiene 991 1162 ug/Kg 117 40 - 135 7 35 Hexane 991 1167 * ug/Kg 118 45 - 140 58 35 Isopropylbenzene 991 1262 * ug/Kg 127 60 - 125 6 35 p-Isopropyltoluene 991 1195 * ug/Kg 121 60 - 120 2 30 Methylene Chloride 991 1214 ug/Kg 122 55 - 145 5 40 Methyl tert-butyl ether 991 1207 ug/Kg 122 55 - 130 4 30 Naphthalene 991 1155 ug/Kg 117 50 - 130 2 30 N-Propylbenzene 991 1244 ug/Kg 125 50 - 125 7 35 Styrene 991 1221 ug/Kg 123 60 - 125 5 35 1,1,1,2-Tetrachloroethane 991 1139 ug/Kg 115 65 - 125 3 30 1,1,2,2-Tetrachloroethane 991 1174 ug/Kg 118 60 - 125 4 35 Tetrachloroethene 991 1180 ug/Kg 119 55 - 125 7 40 Toluene 991 1249 ug/Kg 126 60 - 130 5 35 1,2,3-Trichlorobenzene 991 1156 ug/Kg 117 50 - 130 2 35 1,2,4-Trichlorobenzene 991 1175 ug/Kg 118 45 - 135 1 35

TestAmerica Cedar Falls

Page 78 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8260C - Volatile Organic Compounds by GC/MS (Continued) 3 Lab Sample ID: LCSD 310-109247/3-A Client Sample ID: Lab Control Sample Dup Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 109250 Prep Batch: 109247 Spike LCSD LCSD %Rec. RPD 5 Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 1,1,1-Trichloroethane 991 1265 * ug/Kg 128 60 - 125 8 30 6 1,1,2-Trichloroethane 991 1219 ug/Kg 123 55 - 135 2 30 Trichloroethene 991 1240 ug/Kg 125 60 - 130 6 30 7 1,2,3-Trichloropropane 991 1187 ug/Kg 120 50 - 145 6 35 1,2,4-Trimethylbenzene 991 1153 ug/Kg 116 55 - 125 1 35 8 1,3,5-Trimethylbenzene 991 1180 ug/Kg 119 50 - 130 2 35 Xylenes, Total 1980 2419 ug/Kg 122 50 - 130 4 30 9 LCSD LCSD Surrogate %Recovery Qualifier Limits 10 4-Bromofluorobenzene (Surr) 100 80 - 120 Dibromofluoromethane (Surr) 100 75 - 125 11 Toluene-d8 (Surr) 99 80 - 120 12 Method: 8270D - Semivolatile Organic Compounds (GC/MS) 13 Lab Sample ID: MB 310-108051/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 14 Analysis Batch: 108336 Prep Batch: 108051 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Anthracene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Benzo[a]anthracene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Benzo[a]pyrene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Benzidine <3300 3300 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Benzo[b]fluoranthene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Benzo[g,h,i]perylene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Benzo[k]fluoranthene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Acenaphthene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Acenaphthylene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Benzyl alcohol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Butyl benzyl phthalate <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Bis(2-chloroethyl)ether <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Bis(2-chloroethoxy)methane <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Bis(2-ethylhexyl) phthalate <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 bis (2-chloroisopropyl) ether <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 4-Bromophenyl phenyl ether <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Carbazole <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 4-Chloroaniline <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2-Chloronaphthalene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 4-Chlorophenyl phenyl ether <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Chrysene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Dibenz(a,h)anthracene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Dibenzofuran <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Di-n-butyl phthalate <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 1,2-Dichlorobenzene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 1,3-Dichlorobenzene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 1,4-Dichlorobenzene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 3,3'-Dichlorobenzidine <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1

TestAmerica Cedar Falls

Page 79 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: MB 310-108051/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 108336 Prep Batch: 108051 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diethyl phthalate <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 6 Dimethyl phthalate <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2,4-Dinitrotoluene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 7 2,6-Dinitrotoluene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Fluorene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 8 Hexachlorobenzene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Hexachlorobutadiene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 9 Hexachlorocyclopentadiene <660 660 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Hexachloroethane <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 10 Di-n-octyl phthalate <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Fluoranthene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Indeno[1,2,3-cd]pyrene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 11 Isophorone <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2-Methylnaphthalene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 12 Naphthalene <200 200 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2-Nitroaniline <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 13 3-Nitroaniline <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 4-Nitroaniline <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 14 Nitrobenzene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 N-Nitrosodiphenylamine <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 15 N-Nitrosodi-n-propylamine <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 N-Nitrosodimethylamine <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Phenanthrene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Pyrene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Pyridine <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 1,2,4-Trichlorobenzene <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Benzoic acid <660 660 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 4-Chloro-3-methylphenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2-Chlorophenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Total Cresols <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2,4-Dichlorophenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2,4-Dimethylphenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2,4-Dinitrophenol <660 660 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 4,6-Dinitro-2-methylphenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2-Methylphenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Methylphenol, 3 & 4 <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2-Nitrophenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 4-Nitrophenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Pentachlorophenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 Phenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2,4,5-Trichlorophenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1 2,4,6-Trichlorophenol <330 330 ug/Kg 11/10/15 08:00 11/11/15 16:26 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 38 15 - 90 11/10/15 08:00 11/11/15 16:26 1 Phenol-d6 (Surr) 42 20 - 90 11/10/15 08:00 11/11/15 16:26 1 Nitrobenzene-d5 (Surr) 41 15 - 90 11/10/15 08:00 11/11/15 16:26 1 2-Fluorobiphenyl (Surr) 46 20 - 90 11/10/15 08:00 11/11/15 16:26 1

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Page 80 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: MB 310-108051/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 108336 Prep Batch: 108051 5 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 6 2,4,6-Tribromophenol (Surr) 55 25 - 105 11/10/15 08:00 11/11/15 16:26 1 Terphenyl-d14 (Surr) 84 35 - 110 11/10/15 08:00 11/11/15 16:26 1 7 Lab Sample ID: LCS 310-108051/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 8 Analysis Batch: 108336 Prep Batch: 108051 Spike LCS LCS %Rec. 9 Analyte Added Result Qualifier Unit D %Rec Limits Anthracene 2000 1214 ug/Kg 61 30 - 110 10 Benzo[a]anthracene 2000 1328 ug/Kg 66 40 - 105 Benzo[a]pyrene 2000 1360 ug/Kg 68 45 - 110 11 Benzo[b]fluoranthene 2000 1263 ug/Kg 63 40 - 110 Benzo[g,h,i]perylene 2000 1284 ug/Kg 64 40 - 105 12 Benzo[k]fluoranthene 2000 1376 ug/Kg 69 35 - 100 Acenaphthene 2000 1089 ug/Kg 54 25 - 95 13 Acenaphthylene 2000 1088 ug/Kg 54 25 - 95 Benzyl alcohol 2000 999.0 ug/Kg 50 10 - 90 Butyl benzyl phthalate 2000 1421 ug/Kg 71 30 - 115 14 Bis(2-chloroethyl)ether 2000 906.9 ug/Kg 45 10 - 85 Bis(2-chloroethoxy)methane 2000 1014 ug/Kg 51 15 - 95 15 Bis(2-ethylhexyl) phthalate 2000 1542 ug/Kg 77 30 - 110 bis (2-chloroisopropyl) ether 2000 924.5 ug/Kg 46 10 - 85 4-Bromophenyl phenyl ether 2000 1287 ug/Kg 64 25 - 110 Carbazole 2000 1256 ug/Kg 63 30 - 110 4-Chloroaniline 2000 920.7 ug/Kg 46 15 - 85 2-Chloronaphthalene 2000 1020 ug/Kg 51 20 - 95 4-Chlorophenyl phenyl ether 2000 1168 ug/Kg 58 25 - 100 Chrysene 2000 1343 ug/Kg 67 40 - 105 Dibenz(a,h)anthracene 2000 1336 ug/Kg 67 40 - 105 Dibenzofuran 2000 1114 ug/Kg 56 20 - 95 Di-n-butyl phthalate 2000 1344 ug/Kg 67 30 - 125 1,2-Dichlorobenzene 2000 861.4 ug/Kg 43 10 - 80 1,3-Dichlorobenzene 2000 854.4 ug/Kg 43 10 - 80 1,4-Dichlorobenzene 2000 839.6 ug/Kg 42 10 - 85 Diethyl phthalate 2000 1281 ug/Kg 64 25 - 100 Dimethyl phthalate 2000 1216 ug/Kg 61 25 - 105 2,4-Dinitrotoluene 2000 1208 ug/Kg 60 25 - 100 2,6-Dinitrotoluene 2000 1157 ug/Kg 58 25 - 105 Fluorene 2000 1114 ug/Kg 56 30 - 110 Hexachlorobenzene 2000 1209 ug/Kg 60 25 - 100 Hexachlorobutadiene 2000 894.7 ug/Kg 45 10 - 85 Hexachlorocyclopentadiene 2000 828.6 ug/Kg 41 10 - 95 Hexachloroethane 2000 856.7 ug/Kg 43 10 - 80 Di-n-octyl phthalate 2000 1537 ug/Kg 77 30 - 120 Fluoranthene 2000 1233 ug/Kg 62 35 - 110 Indeno[1,2,3-cd]pyrene 2000 1320 ug/Kg 66 35 - 105 Isophorone 2000 1086 ug/Kg 54 15 - 90 2-Methylnaphthalene 2000 994.3 ug/Kg 50 15 - 90

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Page 81 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: LCS 310-108051/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 108336 Prep Batch: 108051 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Naphthalene 2000 922.6 ug/Kg 46 15 - 90 6 2-Nitroaniline 2000 1140 ug/Kg 57 20 - 100 3-Nitroaniline 2000 1127 ug/Kg 56 25 - 95 7 4-Nitroaniline 2000 1225 ug/Kg 61 25 - 100 Nitrobenzene 2000 909.2 ug/Kg 45 10 - 85 8 N-Nitrosodiphenylamine 4000 2433 ug/Kg 61 25 - 120 N-Nitrosodi-n-propylamine 2000 1079 ug/Kg 54 10 - 95 9 N-Nitrosodimethylamine 2000 902.5 ug/Kg 45 10 - 85 Phenanthrene 2000 1207 ug/Kg 60 30 - 105 10 Pyrene 2000 1414 ug/Kg 71 35 - 110 Pyridine 2000 735.0 ug/Kg 37 10 - 70 1,2,4-Trichlorobenzene 2000 912.0 ug/Kg 46 10 - 90 11 4-Chloro-3-methylphenol 2000 1139 ug/Kg 57 20 - 105 2-Chlorophenol 2000 903.7 ug/Kg 45 10 - 95 12 2,4-Dichlorophenol 2000 998.3 ug/Kg 50 15 - 100 2,4-Dimethylphenol 2000 981.8 ug/Kg 49 15 - 90 13 2,4-Dinitrophenol 4000 1180 ug/Kg 30 10 - 80 4,6-Dinitro-2-methylphenol 4000 2051 ug/Kg 51 10 - 100 14 2-Methylphenol 2000 943.9 ug/Kg 47 10 - 95 Methylphenol, 3 & 4 2000 985.9 ug/Kg 49 15 - 100 15 2-Nitrophenol 2000 967.2 ug/Kg 48 15 - 95 4-Nitrophenol 4000 2396 ug/Kg 60 30 - 105 Pentachlorophenol 4000 2213 ug/Kg 55 25 - 90 Phenol 2000 970.8 ug/Kg 49 10 - 95 2,4,5-Trichlorophenol 2000 1131 ug/Kg 57 25 - 105 2,4,6-Trichlorophenol 2000 1137 ug/Kg 57 20 - 100

LCS LCS Surrogate %Recovery Qualifier Limits 2-Fluorophenol (Surr) 44 15 - 90 Phenol-d6 (Surr) 46 20 - 90 Nitrobenzene-d5 (Surr) 47 15 - 90 2-Fluorobiphenyl (Surr) 52 20 - 90 2,4,6-Tribromophenol (Surr) 62 25 - 105 Terphenyl-d14 (Surr) 77 35 - 110

Lab Sample ID: MB 310-108193/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 108902 Prep Batch: 108193 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Anthracene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Benzo[a]anthracene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Benzo[a]pyrene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Benzidine <100 100 ug/L 11/11/15 14:30 11/16/15 10:53 1 Benzo[b]fluoranthene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Benzo[g,h,i]perylene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Benzo[k]fluoranthene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Acenaphthene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1

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Page 82 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: MB 310-108193/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108902 Prep Batch: 108193 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Acenaphthylene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 6 Benzyl alcohol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Butyl benzyl phthalate <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 7 Bis(2-chloroethyl)ether <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Bis(2-chloroethoxy)methane <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 8 Bis(2-ethylhexyl) phthalate <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 bis (2-chloroisopropyl) ether <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 9 4-Bromophenyl phenyl ether <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Carbazole <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 10 4-Chloroaniline <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2-Chloronaphthalene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 4-Chlorophenyl phenyl ether <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 11 Chrysene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Dibenz(a,h)anthracene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 12 Dibenzofuran <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Di-n-butyl phthalate <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 13 1,2-Dichlorobenzene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 1,3-Dichlorobenzene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 14 1,4-Dichlorobenzene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 3,3'-Dichlorobenzidine <50.0 50.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 15 Diethyl phthalate <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Dimethyl phthalate <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2,4-Dinitrotoluene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2,6-Dinitrotoluene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Fluorene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Hexachlorobenzene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Hexachlorobutadiene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Hexachlorocyclopentadiene <20.0 20.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Hexachloroethane <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Di-n-octyl phthalate <20.0 20.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Fluoranthene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Indeno[1,2,3-cd]pyrene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Isophorone <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2-Methylnaphthalene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Naphthalene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2-Nitroaniline <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 3-Nitroaniline <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 4-Nitroaniline <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Nitrobenzene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 N-Nitrosodiphenylamine <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 N-Nitrosodi-n-propylamine <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 N-Nitrosodimethylamine <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Phenanthrene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Pyrene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Pyridine <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 1,2,4-Trichlorobenzene <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Benzoic acid <100 100 ug/L 11/11/15 14:30 11/16/15 10:53 1 4-Chloro-3-methylphenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1

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Page 83 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: MB 310-108193/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108902 Prep Batch: 108193 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 2-Chlorophenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 6 Total Cresols <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2,4-Dichlorophenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 7 2,4-Dimethylphenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2,4-Dinitrophenol <20.0 20.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 8 4,6-Dinitro-2-methylphenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2-Methylphenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 9 Methylphenol, 3 & 4 <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2-Nitrophenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 10 4-Nitrophenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Pentachlorophenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 Phenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 11 2,4,5-Trichlorophenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 2,4,6-Trichlorophenol <10.0 10.0 ug/L 11/11/15 14:30 11/16/15 10:53 1 12 MB MB 13 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 2-Fluorophenol (Surr) 26 15 - 50 11/11/15 14:30 11/16/15 10:53 1 14 Phenol-d6 (Surr) 18 10 - 35 11/11/15 14:30 11/16/15 10:53 1 Nitrobenzene-d5 (Surr) 44 25 - 80 11/11/15 14:30 11/16/15 10:53 1 2-Fluorobiphenyl (Surr) 45 25 - 80 11/11/15 14:30 11/16/15 10:53 1 15 2,4,6-Tribromophenol (Surr) 45 25 - 100 11/11/15 14:30 11/16/15 10:53 1 Terphenyl-d14 (Surr) 64 30 - 105 11/11/15 14:30 11/16/15 10:53 1

Lab Sample ID: LCS 310-108193/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 108902 Prep Batch: 108193 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Anthracene 50.0 20.56 ug/L 41 35 - 95 Benzo[a]anthracene 50.0 25.51 ug/L 51 30 - 100 Benzo[a]pyrene 50.0 25.49 ug/L 51 35 - 105 Benzo[b]fluoranthene 50.0 23.66 ug/L 47 30 - 100 Benzo[g,h,i]perylene 50.0 23.83 ug/L 48 30 - 105 Benzo[k]fluoranthene 50.0 25.24 ug/L 50 30 - 95 Acenaphthene 50.0 16.92 ug/L 34 25 - 80 Acenaphthylene 50.0 17.21 ug/L 34 25 - 85 Benzyl alcohol 50.0 14.75 ug/L 29 10 - 75 Butyl benzyl phthalate 50.0 23.50 ug/L 47 35 - 100 Bis(2-chloroethyl)ether 50.0 15.06 ug/L 30 20 - 75 Bis(2-chloroethoxy)methane 50.0 17.09 ug/L 34 25 - 80 Bis(2-ethylhexyl) phthalate 50.0 29.28 ug/L 59 35 - 95 bis (2-chloroisopropyl) ether 50.0 14.76 ug/L 30 15 - 75 4-Bromophenyl phenyl ether 50.0 21.96 ug/L 44 30 - 90 Carbazole 50.0 21.47 ug/L 43 30 - 95 4-Chloroaniline 50.0 17.36 ug/L 35 20 - 85 2-Chloronaphthalene 50.0 17.19 ug/L 34 25 - 80 4-Chlorophenyl phenyl ether 50.0 16.94 ug/L 34 30 - 85 Chrysene 50.0 25.72 ug/L 51 30 - 95

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Page 84 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: LCS 310-108193/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108902 Prep Batch: 108193 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Dibenz(a,h)anthracene 50.0 24.41 ug/L 49 30 - 100 6 Dibenzofuran 50.0 16.70 ug/L 33 30 - 85 Di-n-butyl phthalate 50.0 21.13 ug/L 42 30 - 100 7 1,2-Dichlorobenzene 50.0 12.94 ug/L 26 20 - 60 1,3-Dichlorobenzene 50.0 12.48 ug/L 25 20 - 60 8 1,4-Dichlorobenzene 50.0 12.56 ug/L 25 20 - 60 Diethyl phthalate 50.0 17.09 ug/L 34 30 - 90 9 Dimethyl phthalate 50.0 17.68 ug/L 35 25 - 95 2,4-Dinitrotoluene 50.0 17.10 * ug/L 34 35 - 90 10 2,6-Dinitrotoluene 50.0 17.32 ug/L 35 30 - 90 Fluorene 50.0 16.49 ug/L 33 25 - 85 Hexachlorobenzene 50.0 21.07 ug/L 42 35 - 90 11 Hexachlorobutadiene 50.0 14.36 ug/L 29 15 - 65 Hexachlorocyclopentadiene 50.0 14.24 J ug/L 28 10 - 75 12 Hexachloroethane 50.0 12.28 ug/L 25 15 - 60 Di-n-octyl phthalate 50.0 25.51 ug/L 51 30 - 105 13 Fluoranthene 50.0 20.18 ug/L 40 25 - 100 Indeno[1,2,3-cd]pyrene 50.0 24.03 ug/L 48 30 - 100 14 Isophorone 50.0 17.18 ug/L 34 25 - 85 2-Methylnaphthalene 50.0 15.84 ug/L 32 20 - 75 15 Naphthalene 50.0 15.36 ug/L 31 20 - 70 2-Nitroaniline 50.0 18.04 ug/L 36 30 - 85 3-Nitroaniline 50.0 17.76 ug/L 36 30 - 95 4-Nitroaniline 50.0 17.28 ug/L 35 30 - 90 Nitrobenzene 50.0 16.44 ug/L 33 20 - 75 N-Nitrosodiphenylamine 100 41.40 ug/L 41 30 - 95 N-Nitrosodi-n-propylamine 50.0 16.61 ug/L 33 25 - 80 N-Nitrosodimethylamine 50.0 10.53 ug/L 21 10 - 55 Phenanthrene 50.0 20.47 ug/L 41 30 - 90 Pyrene 50.0 24.59 ug/L 49 25 - 100 Pyridine 50.0 9.535 J ug/L 19 10 - 50 1,2,4-Trichlorobenzene 50.0 14.68 ug/L 29 20 - 65 4-Chloro-3-methylphenol 50.0 17.34 ug/L 35 25 - 90 2-Chlorophenol 50.0 15.09 ug/L 30 20 - 70 2,4-Dichlorophenol 50.0 17.08 ug/L 34 25 - 80 2,4-Dimethylphenol 50.0 15.66 ug/L 31 20 - 80 2,4-Dinitrophenol 100 34.97 ug/L 35 20 - 105 4,6-Dinitro-2-methylphenol 100 45.25 ug/L 45 30 - 105 2-Methylphenol 50.0 14.30 ug/L 29 20 - 65 Methylphenol, 3 & 4 50.0 13.32 ug/L 27 15 - 65 2-Nitrophenol 50.0 17.82 ug/L 36 25 - 80 4-Nitrophenol 100 16.39 ug/L 16 10 - 45 Pentachlorophenol 100 45.14 ug/L 45 25 - 85 Phenol 50.0 8.105 J ug/L 16 10 - 35 2,4,5-Trichlorophenol 50.0 19.13 ug/L 38 30 - 85 2,4,6-Trichlorophenol 50.0 20.11 ug/L 40 30 - 85

TestAmerica Cedar Falls

Page 85 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: LCS 310-108193/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108902 Prep Batch: 108193 5 LCS LCS Surrogate %Recovery Qualifier Limits 6 2-Fluorophenol (Surr) 19 15 - 50 Phenol-d6 (Surr) 14 10 - 35 Nitrobenzene-d5 (Surr) 35 25 - 80 7 2-Fluorobiphenyl (Surr) 37 25 - 80 2,4,6-Tribromophenol (Surr) 39 25 - 100 8 Terphenyl-d14 (Surr) 53 30 105 - 9 Lab Sample ID: LCSD 310-108193/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA 10 Analysis Batch: 108902 Prep Batch: 108193 Spike LCSD LCSD %Rec. RPD 11 Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Anthracene 50.0 23.11 ug/L 46 35 - 95 12 35 12 Benzo[a]anthracene 50.0 24.60 ug/L 49 30 - 100 4 35 Benzo[a]pyrene 50.0 25.43 ug/L 51 35 - 105 0 35 13 Benzo[b]fluoranthene 50.0 24.56 ug/L 49 30 - 100 4 35 Benzo[g,h,i]perylene 50.0 24.46 ug/L 49 30 - 105 3 35 Benzo[k]fluoranthene 50.0 24.15 ug/L 48 30 - 95 4 35 14 Acenaphthene 50.0 21.43 ug/L 43 25 - 80 24 35 Acenaphthylene 50.0 21.80 ug/L 44 25 - 85 24 35 15 Benzyl alcohol 50.0 19.27 ug/L 39 10 - 75 27 35 Butyl benzyl phthalate 50.0 24.05 ug/L 48 35 - 100 2 35 Bis(2-chloroethyl)ether 50.0 19.77 ug/L 40 20 - 75 27 30 Bis(2-chloroethoxy)methane 50.0 21.62 ug/L 43 25 - 80 23 35 Bis(2-ethylhexyl) phthalate 50.0 31.71 ug/L 63 35 - 95 8 35 bis (2-chloroisopropyl) ether 50.0 19.14 ug/L 38 15 - 75 26 35 4-Bromophenyl phenyl ether 50.0 26.59 ug/L 53 30 - 90 19 30 Carbazole 50.0 21.70 ug/L 43 30 - 95 1 35 4-Chloroaniline 50.0 11.56 * ug/L 23 20 - 85 40 35 2-Chloronaphthalene 50.0 22.28 ug/L 45 25 - 80 26 35 4-Chlorophenyl phenyl ether 50.0 21.15 ug/L 42 30 - 85 22 35 Chrysene 50.0 24.25 ug/L 49 30 - 95 6 35 Dibenz(a,h)anthracene 50.0 25.17 ug/L 50 30 - 100 3 35 Dibenzofuran 50.0 21.06 ug/L 42 30 - 85 23 30 Di-n-butyl phthalate 50.0 21.24 ug/L 42 30 - 100 1 35 1,2-Dichlorobenzene 50.0 17.46 ug/L 35 20 - 60 30 30 1,3-Dichlorobenzene 50.0 17.13 ug/L 34 20 - 60 31 35 1,4-Dichlorobenzene 50.0 17.11 * ug/L 34 20 - 60 31 30 Diethyl phthalate 50.0 19.34 ug/L 39 30 - 90 12 30 Dimethyl phthalate 50.0 21.20 ug/L 42 25 - 95 18 35 2,4-Dinitrotoluene 50.0 19.16 ug/L 38 35 - 90 11 35 2,6-Dinitrotoluene 50.0 21.04 ug/L 42 30 - 90 19 35 Fluorene 50.0 19.73 ug/L 39 25 - 85 18 35 Hexachlorobenzene 50.0 24.73 ug/L 49 35 - 90 16 35 Hexachlorobutadiene 50.0 19.36 ug/L 39 15 - 65 30 35 Hexachlorocyclopentadiene 50.0 19.93 J ug/L 40 10 - 75 33 35 Hexachloroethane 50.0 17.14 ug/L 34 15 - 60 33 35 Di-n-octyl phthalate 50.0 27.07 ug/L 54 30 - 105 6 35

TestAmerica Cedar Falls

Page 86 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8270D - Semivolatile Organic Compounds (GC/MS) (Continued) 3 Lab Sample ID: LCSD 310-108193/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108902 Prep Batch: 108193 Spike LCSD LCSD %Rec. RPD 5 Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Fluoranthene 50.0 20.81 ug/L 42 25 - 100 3 35 6 Indeno[1,2,3-cd]pyrene 50.0 24.12 ug/L 48 30 - 100 0 35 Isophorone 50.0 22.00 ug/L 44 25 - 85 25 35 7 2-Methylnaphthalene 50.0 19.84 ug/L 40 20 - 75 22 35 Naphthalene 50.0 19.80 ug/L 40 20 - 70 25 35 8 2-Nitroaniline 50.0 21.94 ug/L 44 30 - 85 20 35 3-Nitroaniline 50.0 19.59 ug/L 39 30 - 95 10 35 9 4-Nitroaniline 50.0 18.04 ug/L 36 30 - 90 4 35 Nitrobenzene 50.0 20.62 ug/L 41 20 - 75 23 35 10 N-Nitrosodiphenylamine 100 50.61 ug/L 51 30 - 95 20 35 N-Nitrosodi-n-propylamine 50.0 20.89 ug/L 42 25 - 80 23 30 N-Nitrosodimethylamine 50.0 14.27 ug/L 29 10 - 55 30 30 11 Phenanthrene 50.0 23.24 ug/L 46 30 - 90 13 35 Pyrene 50.0 25.68 ug/L 51 25 - 100 4 35 12 Pyridine 50.0 9.831 J ug/L 20 10 - 50 3 35 1,2,4-Trichlorobenzene 50.0 19.30 ug/L 39 20 - 65 27 30 13 4-Chloro-3-methylphenol 50.0 21.69 ug/L 43 25 - 90 22 35 2-Chlorophenol 50.0 19.82 ug/L 40 20 - 70 27 35 14 2,4-Dichlorophenol 50.0 21.98 ug/L 44 25 - 80 25 35 2,4-Dimethylphenol 50.0 20.24 ug/L 40 20 - 80 25 35 15 2,4-Dinitrophenol 100 41.18 ug/L 41 20 - 105 16 35 4,6-Dinitro-2-methylphenol 100 50.38 ug/L 50 30 - 105 11 35 2-Methylphenol 50.0 18.23 ug/L 36 20 - 65 24 35 Methylphenol, 3 & 4 50.0 17.13 ug/L 34 15 - 65 25 35 2-Nitrophenol 50.0 22.67 ug/L 45 25 - 80 24 35 4-Nitrophenol 100 16.27 ug/L 16 10 - 45 1 35 Pentachlorophenol 100 49.74 ug/L 50 25 - 85 10 35 Phenol 50.0 9.558 J ug/L 19 10 - 35 16 35 2,4,5-Trichlorophenol 50.0 24.88 ug/L 50 30 - 85 26 35 2,4,6-Trichlorophenol 50.0 25.49 ug/L 51 30 - 85 24 35

LCSD LCSD Surrogate %Recovery Qualifier Limits 2-Fluorophenol (Surr) 25 15 - 50 Phenol-d6 (Surr) 17 10 - 35 Nitrobenzene-d5 (Surr) 43 25 - 80 2-Fluorobiphenyl (Surr) 46 25 - 80 2,4,6-Tribromophenol (Surr) 42 25 - 100 Terphenyl-d14 (Surr) 51 30 - 105

Method: 8081B - Organochlorine Pesticides (GC)

Lab Sample ID: MB 310-108089/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 108293 Prep Batch: 108089 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aldrin <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 alpha-BHC <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1

TestAmerica Cedar Falls

Page 87 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) (Continued) 3 Lab Sample ID: MB 310-108089/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108293 Prep Batch: 108089 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac beta-BHC <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 6 Chlordane (technical) <2.00 2.00 ug/L 11/10/15 09:46 11/11/15 15:27 1 4,4'-DDD <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 7 4,4'-DDE <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 4,4'-DDT <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 8 delta-BHC <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 Dieldrin <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 9 Endosulfan I <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 Endosulfan II <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 10 Endosulfan sulfate <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 Endrin <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 Endrin aldehyde <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 11 gamma-BHC (Lindane) <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 Heptachlor <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 12 Heptachlor epoxide <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 Methoxychlor <0.0320 0.0320 ug/L 11/10/15 09:46 11/11/15 15:27 1 13 Toxaphene <2.00 2.00 ug/L 11/10/15 09:46 11/11/15 15:27 1 14 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 49 30 - 125 11/10/15 09:46 11/11/15 15:27 1 15 Tetrachloro-m-xylene 37 15 - 115 11/10/15 09:46 11/11/15 15:27 1

Lab Sample ID: LCS 310-108089/13-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 108472 Prep Batch: 108089 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Chlordane (technical) 12.5 7.938 ug/L 64 10 - 115

LCS LCS Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 43 30 - 125 Tetrachloro-m-xylene 37 15 - 115

Lab Sample ID: LCS 310-108089/14-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 108472 Prep Batch: 108089 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Toxaphene 12.5 8.656 ug/L 69 45 - 120

LCS LCS Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 44 30 - 125 Tetrachloro-m-xylene 35 15 - 115

TestAmerica Cedar Falls

Page 88 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) (Continued) 3 Lab Sample ID: LCS 310-108089/2-A Client Sample ID: Lab Control Sample 4 Matrix: Water Prep Type: Total/NA Analysis Batch: 108293 Prep Batch: 108089 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Aldrin 0.500 0.3693 ug/L 74 30 - 115 6 alpha-BHC 0.500 0.3355 ug/L 67 30 - 115 beta-BHC 0.500 0.3820 ug/L 76 35 - 115 7 4,4'-DDE 0.500 0.3972 ug/L 79 35 - 120 4,4'-DDT 0.500 0.4438 ug/L 89 40 - 135 8 delta-BHC 0.500 0.3700 ug/L 74 40 - 115 Dieldrin 0.500 0.4047 ug/L 81 35 - 120 9 Endosulfan I 0.500 0.1455 ug/L 29 15 - 115 Endosulfan II 0.500 0.1814 ug/L 36 25 - 120 10 Endosulfan sulfate 0.500 0.5449 ug/L 109 40 - 135 Endrin 0.500 0.5009 ug/L 100 35 - 130 11 Endrin aldehyde 0.500 0.4232 ug/L 85 40 - 115 gamma-BHC (Lindane) 0.500 0.3582 ug/L 72 30 - 115 12 Heptachlor 0.500 0.3958 ug/L 79 35 - 115 Heptachlor epoxide 0.500 0.3979 ug/L 80 35 - 115 13 Methoxychlor 0.500 0.4562 ug/L 91 50 - 145 LCS LCS 14 Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 47 30 - 125 15 Tetrachloro-m-xylene 36 15 - 115

Lab Sample ID: LCSD 310-108089/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 108293 Prep Batch: 108089 Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Aldrin 0.500 0.3366 ug/L 67 30 - 115 9 35 alpha-BHC 0.500 0.3176 ug/L 64 30 - 115 5 35 beta-BHC 0.500 0.3571 ug/L 71 35 - 115 7 35 4,4'-DDE 0.500 0.3627 ug/L 73 35 - 120 9 35 4,4'-DDT 0.500 0.4125 ug/L 83 40 - 135 7 35 delta-BHC 0.500 0.3466 ug/L 69 40 - 115 7 35 Dieldrin 0.500 0.3753 ug/L 75 35 - 120 8 35 Endosulfan I 0.500 0.1314 ug/L 26 15 - 115 10 35 Endosulfan II 0.500 0.1719 ug/L 34 25 - 120 5 35 Endosulfan sulfate 0.500 0.5243 ug/L 105 40 - 135 4 35 Endrin 0.500 0.4616 ug/L 92 35 - 130 8 35 Endrin aldehyde 0.500 0.4076 ug/L 82 40 - 115 4 35 gamma-BHC (Lindane) 0.500 0.3333 ug/L 67 30 - 115 7 35 Heptachlor 0.500 0.3618 ug/L 72 35 - 115 9 35 Heptachlor epoxide 0.500 0.3621 ug/L 72 35 - 115 9 35 Methoxychlor 0.500 0.4237 ug/L 85 50 - 145 7 35

LCSD LCSD Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 46 30 - 125 Tetrachloro-m-xylene 37 15 - 115

TestAmerica Cedar Falls

Page 89 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) (Continued) 3 Lab Sample ID: MB 500-312063/1-A Client Sample ID: Method Blank 4 Matrix: Solid Prep Type: Total/NA Analysis Batch: 312349 Prep Batch: 312063 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Aldrin <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 6 alpha-BHC <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 beta-BHC <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 7 Chlordane (technical) <6.70 6.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 4,4'-DDD <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 8 4,4'-DDE <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 4,4'-DDT <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 9 delta-BHC <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 Dieldrin <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 10 Endosulfan I <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 Endosulfan II <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 11 Endosulfan sulfate <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 Endrin <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 12 Endrin aldehyde <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 gamma-BHC (Lindane) <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 Heptachlor <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 13 Heptachlor epoxide <1.70 1.70 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 Toxaphene <16.7 16.7 ug/Kg 11/10/15 19:00 11/12/15 18:22 1 14 MB MB 15 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl 109 56 - 128 11/10/15 19:00 11/12/15 18:22 1 Tetrachloro-m-xylene 90 45 - 112 11/10/15 19:00 11/12/15 18:22 1

Lab Sample ID: LCS 500-312063/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 312349 Prep Batch: 312063 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Aldrin 13.3 12.92 ug/Kg 97 54 - 110 alpha-BHC 13.3 12.55 ug/Kg 94 53 - 110 beta-BHC 13.3 13.47 ug/Kg 101 65 - 110 4,4'-DDD 13.3 13.16 ug/Kg 99 66 - 110 4,4'-DDE 13.3 13.12 ug/Kg 98 64 - 110 4,4'-DDT 13.3 12.34 ug/Kg 93 50 - 115 delta-BHC 13.3 13.64 ug/Kg 102 50 - 110 Dieldrin 13.3 13.00 ug/Kg 97 63 - 110 Endosulfan I 13.3 10.60 ug/Kg 79 51 - 110 Endosulfan II 13.3 11.37 ug/Kg 85 56 - 110 Endosulfan sulfate 13.3 12.05 ug/Kg 90 63 - 120 Endrin 13.3 13.47 ug/Kg 101 59 - 110 Endrin aldehyde 13.3 10.35 ug/Kg 78 56 - 110 gamma-BHC (Lindane) 13.3 12.66 ug/Kg 95 55 - 110 Heptachlor 13.3 11.78 ug/Kg 88 50 - 110 Heptachlor epoxide 13.3 12.90 ug/Kg 97 50 - 122

LCS LCS Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl 106 56 - 128

TestAmerica Cedar Falls

Page 90 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8081B - Organochlorine Pesticides (GC) (Continued) 3 Lab Sample ID: LCS 500-312063/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 312349 Prep Batch: 312063 5 LCS LCS Surrogate %Recovery Qualifier Limits 6 Tetrachloro-m-xylene 98 45 - 112 7 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography

Lab Sample ID: MB 310-107873/1-A Client Sample ID: Method Blank 8 Matrix: Solid Prep Type: Total/NA Analysis Batch: 108186 Prep Batch: 107873 9 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 10 PCB-1016 <0.0500 0.0500 mg/Kg 11/09/15 09:54 11/10/15 15:06 1 PCB-1221 <0.0500 0.0500 mg/Kg 11/09/15 09:54 11/10/15 15:06 1 11 PCB-1232 <0.0500 0.0500 mg/Kg 11/09/15 09:54 11/10/15 15:06 1 PCB-1242 <0.0500 0.0500 mg/Kg 11/09/15 09:54 11/10/15 15:06 1 12 PCB-1248 <0.0500 0.0500 mg/Kg 11/09/15 09:54 11/10/15 15:06 1 PCB-1254 <0.0500 0.0500 mg/Kg 11/09/15 09:54 11/10/15 15:06 1 13 PCB-1260 <0.0500 0.0500 mg/Kg 11/09/15 09:54 11/10/15 15:06 1 PCB-1268 <0.0500 0.0500 mg/Kg 11/09/15 09:54 11/10/15 15:06 1 14 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 15 DCB Decachlorobiphenyl (Surr) 94 40 - 120 11/09/15 09:54 11/10/15 15:06 1 Tetrachloro-m-xylene 83 10 - 105 11/09/15 09:54 11/10/15 15:06 1

Lab Sample ID: LCS 310-107873/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 108186 Prep Batch: 107873 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits PCB-1016 0.200 0.1641 mg/Kg 82 20 - 105 PCB-1260 0.200 0.1460 mg/Kg 73 20 - 105

LCS LCS Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 88 40 - 120 Tetrachloro-m-xylene 71 10 - 105

Lab Sample ID: MB 310-108090/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 108284 Prep Batch: 108090 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.800 0.800 ug/L 11/10/15 09:48 11/11/15 15:18 1 PCB-1221 <0.800 0.800 ug/L 11/10/15 09:48 11/11/15 15:18 1 PCB-1232 <0.800 0.800 ug/L 11/10/15 09:48 11/11/15 15:18 1 PCB-1242 <0.800 0.800 ug/L 11/10/15 09:48 11/11/15 15:18 1 PCB-1248 <0.800 0.800 ug/L 11/10/15 09:48 11/11/15 15:18 1 PCB-1254 <0.800 0.800 ug/L 11/10/15 09:48 11/11/15 15:18 1 PCB-1260 <0.800 0.800 ug/L 11/10/15 09:48 11/11/15 15:18 1 PCB-1268 <0.800 0.800 ug/L 11/10/15 09:48 11/11/15 15:18 1

TestAmerica Cedar Falls

Page 91 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography (Continued) 3 Lab Sample ID: MB 310-108090/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 4 Analysis Batch: 108284 Prep Batch: 108090 5 MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac 6 DCB Decachlorobiphenyl (Surr) 104 25 - 115 11/10/15 09:48 11/11/15 15:18 1 Tetrachloro-m-xylene 80 20 - 90 11/10/15 09:48 11/11/15 15:18 1 7 Lab Sample ID: LCS 310-108090/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA 8 Analysis Batch: 108284 Prep Batch: 108090 Spike LCS LCS %Rec. 9 Analyte Added Result Qualifier Unit D %Rec Limits PCB-1016 5.00 3.989 ug/L 80 25 - 95 10 PCB-1260 5.00 4.182 ug/L 84 25 - 95

LCS LCS 11 Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 98 25 - 115 12 Tetrachloro-m-xylene 74 20 - 90 13 Lab Sample ID: LCSD 310-108090/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA 14 Analysis Batch: 108284 Prep Batch: 108090 Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit 15 PCB-1016 5.00 3.613 ug/L 72 25 - 95 10 35 PCB-1260 5.00 3.932 ug/L 79 25 - 95 6 35

LCSD LCSD Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 98 25 - 115 Tetrachloro-m-xylene 74 20 - 90

Lab Sample ID: MB 310-108353/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 108703 Prep Batch: 108353 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac PCB-1016 <0.0500 0.0500 mg/Kg 11/12/15 14:00 11/13/15 16:49 1 PCB-1221 <0.0500 0.0500 mg/Kg 11/12/15 14:00 11/13/15 16:49 1 PCB-1232 <0.0500 0.0500 mg/Kg 11/12/15 14:00 11/13/15 16:49 1 PCB-1242 <0.0500 0.0500 mg/Kg 11/12/15 14:00 11/13/15 16:49 1 PCB-1248 <0.0500 0.0500 mg/Kg 11/12/15 14:00 11/13/15 16:49 1 PCB-1254 <0.0500 0.0500 mg/Kg 11/12/15 14:00 11/13/15 16:49 1 PCB-1260 <0.0500 0.0500 mg/Kg 11/12/15 14:00 11/13/15 16:49 1 PCB-1268 <0.0500 0.0500 mg/Kg 11/12/15 14:00 11/13/15 16:49 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac DCB Decachlorobiphenyl (Surr) 74 40 - 120 11/12/15 14:00 11/13/15 16:49 1 Tetrachloro-m-xylene 57 10 - 105 11/12/15 14:00 11/13/15 16:49 1

TestAmerica Cedar Falls

Page 92 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography (Continued) 3 Lab Sample ID: LCS 310-108353/2-A Client Sample ID: Lab Control Sample 4 Matrix: Solid Prep Type: Total/NA Analysis Batch: 108703 Prep Batch: 108353 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits PCB-1016 0.200 0.2540 * mg/Kg 127 20 - 105 6 PCB-1260 0.200 0.1502 mg/Kg 75 20 105 - 7 LCS LCS Surrogate %Recovery Qualifier Limits 8 DCB Decachlorobiphenyl (Surr) 80 40 - 120 Tetrachloro-m-xylene 69 10 - 105 9 Lab Sample ID: 310-68446-1 MS Client Sample ID: B-2E 0-1.5' Matrix: Soil Prep Type: Total/NA 10 Analysis Batch: 108703 Prep Batch: 108353 Sample Sample Spike MS MS %Rec. 11 Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits PCB-1016 <0.125 * F2 0.222 0.1358 mg/Kg ☼ 61 20 - 115 12 PCB-1260 <0.125 F2 0.222 0.06528 mg/Kg ☼ 23 20 - 115

MS MS 13 Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 30 X 40 - 120 14 Tetrachloro-m-xylene 22 10 - 105 15 Lab Sample ID: 310-68446-1 MSD Client Sample ID: B-2E 0-1.5' Matrix: Soil Prep Type: Total/NA Analysis Batch: 108703 Prep Batch: 108353 Sample Sample Spike MSD MSD %Rec. RPD Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit PCB-1016 <0.125 * F2 0.265 0.1925 F2 mg/Kg ☼ 73 20 - 115 35 20 PCB-1260 <0.125 F2 0.265 0.1095 F2 mg/Kg ☼ 36 20 - 115 51 20

MSD MSD Surrogate %Recovery Qualifier Limits DCB Decachlorobiphenyl (Surr) 46 40 - 120 Tetrachloro-m-xylene 33 10 - 105

Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC)

Lab Sample ID: MB 310-108046/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 108354 Prep Batch: 108046 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <10.0 10.0 mg/Kg 11/10/15 07:56 11/11/15 14:23 1 Gasoline <10.0 10.0 mg/Kg 11/10/15 07:56 11/11/15 14:23 1 Waste Oil <10.0 10.0 mg/Kg 11/10/15 07:56 11/11/15 14:23 1 Total Extractable Hydrocarbons <15.0 15.0 mg/Kg 11/10/15 07:56 11/11/15 14:23 1

MB MB Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 82 40 - 135 11/10/15 07:56 11/11/15 14:23 1

TestAmerica Cedar Falls

Page 93 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: OA-2 - Iowa - Extractable Petroleum Hydrocarbons (GC) (Continued) 3 Lab Sample ID: LCS 310-108046/2-A Client Sample ID: Lab Control Sample 4 Matrix: Solid Prep Type: Total/NA Analysis Batch: 108354 Prep Batch: 108046 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Diesel 133 103.6 mg/Kg 78 30 - 120 6 LCS LCS 7 Surrogate %Recovery Qualifier Limits n-Octacosane 88 40 - 135 8 Lab Sample ID: MB 310-108191/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA 9 Analysis Batch: 108707 Prep Batch: 108191 MB MB 10 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Diesel <300 300 ug/L 11/11/15 14:26 11/13/15 21:07 1 11 Gasoline <300 300 ug/L 11/11/15 14:26 11/13/15 21:07 1 Waste Oil <300 300 ug/L 11/11/15 14:26 11/13/15 21:07 1 12 Total Extractable Hydrocarbons <500 500 ug/L 11/11/15 14:26 11/13/15 21:07 1

MB MB 13 Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac n-Octacosane 86 45 - 140 11/11/15 14:26 11/13/15 21:07 1 14 Lab Sample ID: LCS 310-108191/2-A Client Sample ID: Lab Control Sample 15 Matrix: Water Prep Type: Total/NA Analysis Batch: 108707 Prep Batch: 108191 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Diesel 2000 1597 ug/L 80 30 - 125

LCS LCS Surrogate %Recovery Qualifier Limits n-Octacosane 90 45 - 140

Lab Sample ID: LCSD 310-108191/3-A Client Sample ID: Lab Control Sample Dup Matrix: Water Prep Type: Total/NA Analysis Batch: 108707 Prep Batch: 108191 Spike LCSD LCSD %Rec. RPD Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit Diesel 2000 954.3 * ug/L 48 30 - 125 50 35

LCSD LCSD Surrogate %Recovery Qualifier Limits n-Octacosane 72 45 - 140

Method: 6010C - Metals (ICP)

Lab Sample ID: MB 310-107884/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 108068 Prep Batch: 107884 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <4.85 4.85 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 Arsenic <3.88 3.88 mg/Kg 11/09/15 10:18 11/09/15 17:43 1

TestAmerica Cedar Falls

Page 94 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 6010C - Metals (ICP) (Continued) 3 Lab Sample ID: MB 310-107884/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA 4 Analysis Batch: 108068 Prep Batch: 107884 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Beryllium <0.485 0.485 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 6 Cadmium <0.970 0.970 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 Chromium <0.970 0.970 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 7 Copper <0.970 0.970 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 Lead <4.85 4.85 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 8 Nickel <2.42 2.42 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 Selenium <7.27 7.27 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 9 Silver <0.970 0.970 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 Zinc <0.970 0.970 mg/Kg 11/09/15 10:18 11/09/15 17:43 1 10 Lab Sample ID: LCS 310-107884/2-A Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA 11 Analysis Batch: 108068 Prep Batch: 107884 Spike LCS LCS %Rec. 12 Analyte Added Result Qualifier Unit D %Rec Limits Antimony 186 185.3 mg/Kg 100 80 - 120 13 Arsenic 186 190.8 mg/Kg 103 80 - 120 Beryllium 92.9 93.14 mg/Kg 100 80 - 120 14 Cadmium 92.9 93.07 mg/Kg 100 80 - 120 Chromium 92.9 99.07 mg/Kg 107 80 - 120 15 Copper 186 200.3 mg/Kg 108 80 - 120 Lead 186 179.2 mg/Kg 96 80 - 120 Nickel 186 183.7 mg/Kg 99 80 - 120 Selenium 372 375.7 mg/Kg 101 80 - 120 Silver 92.9 94.08 mg/Kg 101 80 - 120 Zinc 186 190.2 mg/Kg 102 80 - 120

Method: 6020A - Metals (ICP/MS)

Lab Sample ID: MB 310-108000/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 108425 Prep Batch: 108000 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Antimony <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:00 1 Arsenic <0.00200 0.00200 mg/L 11/10/15 18:21 11/11/15 14:00 1 Beryllium <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:00 1 Cadmium <0.000500 0.000500 mg/L 11/10/15 18:21 11/11/15 14:00 1 Chromium <0.00500 0.00500 mg/L 11/10/15 18:21 11/11/15 14:00 1 Copper <0.00200 0.00200 mg/L 11/10/15 18:21 11/11/15 14:00 1 Lead <0.000500 0.000500 mg/L 11/10/15 18:21 11/11/15 14:00 1 Nickel <0.00500 0.00500 mg/L 11/10/15 18:21 11/11/15 14:00 1 Selenium <0.00500 0.00500 mg/L 11/10/15 18:21 11/11/15 14:00 1 Silver <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:00 1 Thallium <0.00100 0.00100 mg/L 11/10/15 18:21 11/11/15 14:00 1 Zinc <0.0100 0.0100 mg/L 11/10/15 18:21 11/11/15 14:00 1

TestAmerica Cedar Falls

Page 95 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 6020A - Metals (ICP/MS) (Continued) 3 Lab Sample ID: LCS 310-108000/2-A Client Sample ID: Lab Control Sample 4 Matrix: Water Prep Type: Total/NA Analysis Batch: 108425 Prep Batch: 108000 Spike LCS LCS %Rec. 5 Analyte Added Result Qualifier Unit D %Rec Limits Antimony 0.0200 0.02037 mg/L 102 80 - 120 6 Arsenic 0.0400 0.04039 mg/L 101 80 - 120 Beryllium 0.0200 0.02259 mg/L 113 80 - 120 7 Cadmium 0.0200 0.02078 mg/L 104 80 - 120 Chromium 0.0400 0.04215 mg/L 105 80 - 120 8 Copper 0.0400 0.04225 mg/L 106 80 - 120 Lead 0.0200 0.02064 mg/L 103 80 - 120 9 Nickel 0.0400 0.04182 mg/L 105 80 - 120 Selenium 0.0400 0.04016 mg/L 100 80 - 120 10 Silver 0.0200 0.02277 mg/L 114 80 - 120 Thallium 0.0160 0.01592 mg/L 100 80 - 120 11 Zinc 0.0400 0.04377 mg/L 109 80 - 120 12 Method: 7010 - Metals (GFAA) 13 Lab Sample ID: MB 310-107895/1-A Client Sample ID: Method Blank Matrix: Solid Prep Type: Total/NA Analysis Batch: 109356 Prep Batch: 107895 14 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 15 Thallium <0.223 0.223 mg/Kg 11/09/15 10:31 11/17/15 17:06 1

Lab Sample ID: LCS 310-107895/2-A ^2 Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: Total/NA Analysis Batch: 109356 Prep Batch: 107895 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Thallium 1.71 1.762 mg/Kg 103 80 - 120

Method: 7470A - Mercury (CVAA)

Lab Sample ID: MB 310-108160/1-A Client Sample ID: Method Blank Matrix: Water Prep Type: Total/NA Analysis Batch: 108343 Prep Batch: 108160 MB MB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.000200 0.000200 mg/L 11/10/15 13:12 11/11/15 10:29 1

Lab Sample ID: LCS 310-108160/2-A Client Sample ID: Lab Control Sample Matrix: Water Prep Type: Total/NA Analysis Batch: 108343 Prep Batch: 108160 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Mercury 0.00167 0.001437 mg/L 86 80 - 120

TestAmerica Cedar Falls

Page 96 of 119 11/19/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 7471B - Mercury (CVAA) 3 Lab Sample ID: MB 310-108308/1-A Client Sample ID: Method Blank 4 Matrix: Solid Prep Type: Total/NA Analysis Batch: 108519 Prep Batch: 108308 MB MB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.0200 0.0200 mg/Kg 11/11/15 10:29 11/12/15 10:55 1 6

Lab Sample ID: LCS 310-108308/2-A Client Sample ID: Lab Control Sample 7 Matrix: Solid Prep Type: Total/NA Analysis Batch: 108519 Prep Batch: 108308 8 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits 9 Mercury 0.158 0.1425 mg/Kg 90 80 - 120 10 11 12 13 14 15

TestAmerica Cedar Falls

Page 97 of 119 11/19/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 GC/MS VOA 3 Prep Batch: 107903 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-3 B-3E 1-2' Total/NA Soil 5030B 5 310-68446-4 B-4E 0-1' Total/NA Soil 5030B 310-68446-5 B-5E 0.5-3' Total/NA Soil 5030B 6 LCS 310-107903/2-A Lab Control Sample Total/NA Solid 5030B MB 310-107903/1-A Method Blank Total/NA Solid 5030B 7 Analysis Batch: 107904

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 8 310-68446-3 B-3E 1-2' Total/NA Soil 8260C 107903 310-68446-4 B-4E 0-1' Total/NA Soil 8260C 107903 9 310-68446-5 B-5E 0.5-3' Total/NA Soil 8260C 107903 LCS 310-107903/2-A Lab Control Sample Total/NA Solid 8260C 107903 10 MB 310-107903/1-A Method Blank Total/NA Solid 8260C 107903 11 Analysis Batch: 108662 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 12 310-68446-8 B-4E Total/NA Ground Water 8260C 310-68446-9 B-5E Total/NA Ground Water 8260C 13 310-68446-10 Trip Blank Total/NA Water 8260C LCS 310-108662/5 Lab Control Sample Total/NA Water 8260C 14 MB 310-108662/7 Method Blank Total/NA Water 8260C Analysis Batch: 108840 15 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 8260C 310-68446-7 MS B-2E Total/NA Ground Water 8260C 310-68446-7 MSD B-2E Total/NA Ground Water 8260C LCS 310-108840/5 Lab Control Sample Total/NA Water 8260C MB 310-108840/7 Method Blank Total/NA Water 8260C

Analysis Batch: 109055

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-6 B-6E 0-1.4' Total/NA Soil 8260C 109058 LCS 310-109058/2-A Lab Control Sample Total/NA Solid 8260C 109058 LCSD 310-109058/3-A Lab Control Sample Dup Total/NA Solid 8260C 109058 MB 310-109058/1-A Method Blank Total/NA Solid 8260C 109058

Prep Batch: 109058

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-6 B-6E 0-1.4' Total/NA Soil 5030B LCS 310-109058/2-A Lab Control Sample Total/NA Solid 5030B LCSD 310-109058/3-A Lab Control Sample Dup Total/NA Solid 5030B MB 310-109058/1-A Method Blank Total/NA Solid 5030B

Prep Batch: 109247

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 5030B LCS 310-109247/2-A Lab Control Sample Total/NA Solid 5030B LCSD 310-109247/3-A Lab Control Sample Dup Total/NA Solid 5030B MB 310-109247/1-A Method Blank Total/NA Solid 5030B

TestAmerica Cedar Falls

Page 98 of 119 11/19/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 GC/MS VOA (Continued) 3 Analysis Batch: 109250 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 8260C 109247 5 LCS 310-109247/2-A Lab Control Sample Total/NA Solid 8260C 109247 LCSD 310-109247/3-A Lab Control Sample Dup Total/NA Solid 8260C 109247 6 MB 310-109247/1-A Method Blank Total/NA Solid 8260C 109247 7 GC/MS Semi VOA Prep Batch: 108051 8

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 3546 9 310-68446-2 B-3E 0-1' Total/NA Soil 3546 310-68446-4 B-4E 0-1' Total/NA Soil 3546 10 310-68446-5 B-5E 0.5-3' Total/NA Soil 3546 310-68446-6 B-6E 0-1.4' Total/NA Soil 3546 11 LCS 310-108051/2-A Lab Control Sample Total/NA Solid 3546 MB 310-108051/1-A Method Blank Total/NA Solid 3546 12 Prep Batch: 108193 13 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 3510C 14 310-68446-8 B-4E Total/NA Ground Water 3510C 310-68446-9 B-5E Total/NA Ground Water 3510C 15 LCS 310-108193/2-A Lab Control Sample Total/NA Water 3510C LCSD 310-108193/3-A Lab Control Sample Dup Total/NA Water 3510C MB 310-108193/1-A Method Blank Total/NA Water 3510C

Analysis Batch: 108336

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch LCS 310-108051/2-A Lab Control Sample Total/NA Solid 8270D 108051 MB 310-108051/1-A Method Blank Total/NA Solid 8270D 108051

Analysis Batch: 108493

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 8270D 108051 310-68446-2 B-3E 0-1' Total/NA Soil 8270D 108051 310-68446-4 B-4E 0-1' Total/NA Soil 8270D 108051 310-68446-5 B-5E 0.5-3' Total/NA Soil 8270D 108051 310-68446-6 B-6E 0-1.4' Total/NA Soil 8270D 108051

Analysis Batch: 108902

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 8270D 108193 310-68446-8 B-4E Total/NA Ground Water 8270D 108193 310-68446-9 B-5E Total/NA Ground Water 8270D 108193 LCS 310-108193/2-A Lab Control Sample Total/NA Water 8270D 108193 LCSD 310-108193/3-A Lab Control Sample Dup Total/NA Water 8270D 108193 MB 310-108193/1-A Method Blank Total/NA Water 8270D 108193

TestAmerica Cedar Falls

Page 99 of 119 11/19/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 GC Semi VOA 3 Prep Batch: 107873 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-4 B-4E 0-1' Total/NA Soil 3546 5 310-68446-5 B-5E 0.5-3' Total/NA Soil 3546 310-68446-6 B-6E 0-1.4' Total/NA Soil 3546 6 LCS 310-107873/2-A Lab Control Sample Total/NA Solid 3546 MB 310-107873/1-A Method Blank Total/NA Solid 3546 7 Prep Batch: 108046

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 8 310-68446-1 B-2E 0-1.5' Total/NA Soil 3546 310-68446-2 B-3E 0-1' Total/NA Soil 3546 9 310-68446-4 B-4E 0-1' Total/NA Soil 3546 310-68446-5 B-5E 0.5-3' Total/NA Soil 3546 10 310-68446-6 B-6E 0-1.4' Total/NA Soil 3546 LCS 310-108046/2-A Lab Control Sample Total/NA Solid 3546 11 MB 310-108046/1-A Method Blank Total/NA Solid 3546

Prep Batch: 108089 12 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 13 310-68446-7 B-2E Total/NA Ground Water 3510C 310-68446-8 B-4E Total/NA Ground Water 3510C 14 310-68446-9 B-5E Total/NA Ground Water 3510C LCS 310-108089/13-A Lab Control Sample Total/NA Water 3510C LCS 310-108089/14-A Lab Control Sample Total/NA Water 3510C 15 LCS 310-108089/2-A Lab Control Sample Total/NA Water 3510C LCSD 310-108089/3-A Lab Control Sample Dup Total/NA Water 3510C MB 310-108089/1-A Method Blank Total/NA Water 3510C

Prep Batch: 108090

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 3510C 310-68446-8 B-4E Total/NA Ground Water 3510C 310-68446-9 B-5E Total/NA Ground Water 3510C LCS 310-108090/2-A Lab Control Sample Total/NA Water 3510C LCSD 310-108090/3-A Lab Control Sample Dup Total/NA Water 3510C MB 310-108090/1-A Method Blank Total/NA Water 3510C

Analysis Batch: 108186

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-4 B-4E 0-1' Total/NA Soil 8082A 107873 310-68446-5 B-5E 0.5-3' Total/NA Soil 8082A 107873 310-68446-6 B-6E 0-1.4' Total/NA Soil 8082A 107873 LCS 310-107873/2-A Lab Control Sample Total/NA Solid 8082A 107873 MB 310-107873/1-A Method Blank Total/NA Solid 8082A 107873

Prep Batch: 108191

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 3510C 310-68446-8 B-4E Total/NA Ground Water 3510C 310-68446-9 B-5E Total/NA Ground Water 3510C LCS 310-108191/2-A Lab Control Sample Total/NA Water 3510C LCSD 310-108191/3-A Lab Control Sample Dup Total/NA Water 3510C

TestAmerica Cedar Falls

Page 100 of 119 11/19/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 GC Semi VOA (Continued) 3 Prep Batch: 108191 (Continued) 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch MB 310-108191/1-A Method Blank Total/NA Water 3510C 5 Analysis Batch: 108284 6 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 8082A 108090 310-68446-8 B-4E Total/NA Ground Water 8082A 108090 7 310-68446-9 B-5E Total/NA Ground Water 8082A 108090 LCS 310-108090/2-A Lab Control Sample Total/NA Water 8082A 108090 8 LCSD 310-108090/3-A Lab Control Sample Dup Total/NA Water 8082A 108090 MB 310-108090/1-A Method Blank Total/NA Water 8082A 108090 9 Analysis Batch: 108293 10 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 8081B 108089 11 310-68446-9 B-5E Total/NA Ground Water 8081B 108089 LCS 310-108089/2-A Lab Control Sample Total/NA Water 8081B 108089 12 LCSD 310-108089/3-A Lab Control Sample Dup Total/NA Water 8081B 108089 MB 310-108089/1-A Method Blank Total/NA Water 8081B 108089 13 Prep Batch: 108353 14 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 3546 310-68446-1 MS B-2E 0-1.5' Total/NA Soil 3546 15 310-68446-1 MSD B-2E 0-1.5' Total/NA Soil 3546 310-68446-2 B-3E 0-1' Total/NA Soil 3546 LCS 310-108353/2-A Lab Control Sample Total/NA Solid 3546 MB 310-108353/1-A Method Blank Total/NA Solid 3546

Analysis Batch: 108354

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil OA-2 108046 310-68446-2 B-3E 0-1' Total/NA Soil OA-2 108046 310-68446-4 B-4E 0-1' Total/NA Soil OA-2 108046 310-68446-5 B-5E 0.5-3' Total/NA Soil OA-2 108046 310-68446-6 B-6E 0-1.4' Total/NA Soil OA-2 108046 LCS 310-108046/2-A Lab Control Sample Total/NA Solid OA-2 108046 MB 310-108046/1-A Method Blank Total/NA Solid OA-2 108046

Analysis Batch: 108472

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-8 B-4E Total/NA Ground Water 8081B 108089 LCS 310-108089/13-A Lab Control Sample Total/NA Water 8081B 108089 LCS 310-108089/14-A Lab Control Sample Total/NA Water 8081B 108089

Analysis Batch: 108703

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 8082A 108353 310-68446-1 MS B-2E 0-1.5' Total/NA Soil 8082A 108353 310-68446-1 MSD B-2E 0-1.5' Total/NA Soil 8082A 108353 310-68446-2 B-3E 0-1' Total/NA Soil 8082A 108353 LCS 310-108353/2-A Lab Control Sample Total/NA Solid 8082A 108353

TestAmerica Cedar Falls

Page 101 of 119 11/19/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 GC Semi VOA (Continued) 3 Analysis Batch: 108703 (Continued) 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch MB 310-108353/1-A Method Blank Total/NA Solid 8082A 108353 5 Analysis Batch: 108707 6 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water OA-2 108191 310-68446-8 B-4E Total/NA Ground Water OA-2 108191 7 310-68446-9 B-5E Total/NA Ground Water OA-2 108191 LCS 310-108191/2-A Lab Control Sample Total/NA Water OA-2 108191 8 LCSD 310-108191/3-A Lab Control Sample Dup Total/NA Water OA-2 108191 MB 310-108191/1-A Method Blank Total/NA Water OA-2 108191 9 Prep Batch: 312063 10 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 3541 11 310-68446-2 B-3E 0-1' Total/NA Soil 3541 310-68446-4 B-4E 0-1' Total/NA Soil 3541 12 310-68446-5 B-5E 0.5-3' Total/NA Soil 3541 310-68446-6 B-6E 0-1.4' Total/NA Soil 3541 13 LCS 500-312063/2-A Lab Control Sample Total/NA Solid 3541 MB 500-312063/1-A Method Blank Total/NA Solid 3541 14 Analysis Batch: 312349

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 15 310-68446-1 B-2E 0-1.5' Total/NA Soil 8081B 312063 310-68446-2 B-3E 0-1' Total/NA Soil 8081B 312063 310-68446-4 B-4E 0-1' Total/NA Soil 8081B 312063 310-68446-5 B-5E 0.5-3' Total/NA Soil 8081B 312063 310-68446-6 B-6E 0-1.4' Total/NA Soil 8081B 312063 LCS 500-312063/2-A Lab Control Sample Total/NA Solid 8081B 312063 MB 500-312063/1-A Method Blank Total/NA Solid 8081B 312063

Metals Prep Batch: 107884

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 3050B 310-68446-2 B-3E 0-1' Total/NA Soil 3050B 310-68446-4 B-4E 0-1' Total/NA Soil 3050B 310-68446-5 B-5E 0.5-3' Total/NA Soil 3050B 310-68446-6 B-6E 0-1.4' Total/NA Soil 3050B LCS 310-107884/2-A Lab Control Sample Total/NA Solid 3050B MB 310-107884/1-A Method Blank Total/NA Solid 3050B

Prep Batch: 107895

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 3050B 310-68446-2 B-3E 0-1' Total/NA Soil 3050B 310-68446-4 B-4E 0-1' Total/NA Soil 3050B 310-68446-5 B-5E 0.5-3' Total/NA Soil 3050B 310-68446-6 B-6E 0-1.4' Total/NA Soil 3050B

TestAmerica Cedar Falls

Page 102 of 119 11/19/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Metals (Continued) 3 Prep Batch: 107895 (Continued) 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch LCS 310-107895/2-A ^2 Lab Control Sample Total/NA Solid 3050B 5 MB 310-107895/1-A Method Blank Total/NA Solid 3050B

Prep Batch: 108000 6

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 3010A 7 310-68446-8 B-4E Total/NA Ground Water 3010A 310-68446-9 B-5E Total/NA Ground Water 3010A 8 LCS 310-108000/2-A Lab Control Sample Total/NA Water 3010A MB 310-108000/1-A Method Blank Total/NA Water 3010A 9 Analysis Batch: 108068 10 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 6010C 107884 11 310-68446-2 B-3E 0-1' Total/NA Soil 6010C 107884 310-68446-4 B-4E 0-1' Total/NA Soil 6010C 107884 12 310-68446-5 B-5E 0.5-3' Total/NA Soil 6010C 107884 310-68446-6 B-6E 0-1.4' Total/NA Soil 6010C 107884 13 LCS 310-107884/2-A Lab Control Sample Total/NA Solid 6010C 107884 MB 310-107884/1-A Method Blank Total/NA Solid 6010C 107884 14 Prep Batch: 108160

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 15 310-68446-7 B-2E Total/NA Ground Water 7470A 310-68446-8 B-4E Total/NA Ground Water 7470A 310-68446-9 B-5E Total/NA Ground Water 7470A LCS 310-108160/2-A Lab Control Sample Total/NA Water 7470A MB 310-108160/1-A Method Blank Total/NA Water 7470A

Prep Batch: 108308

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 7471B 310-68446-2 B-3E 0-1' Total/NA Soil 7471B 310-68446-4 B-4E 0-1' Total/NA Soil 7471B 310-68446-5 B-5E 0.5-3' Total/NA Soil 7471B 310-68446-6 B-6E 0-1.4' Total/NA Soil 7471B LCS 310-108308/2-A Lab Control Sample Total/NA Solid 7471B MB 310-108308/1-A Method Blank Total/NA Solid 7471B

Analysis Batch: 108343

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 7470A 108160 310-68446-8 B-4E Total/NA Ground Water 7470A 108160 310-68446-9 B-5E Total/NA Ground Water 7470A 108160 LCS 310-108160/2-A Lab Control Sample Total/NA Water 7470A 108160 MB 310-108160/1-A Method Blank Total/NA Water 7470A 108160

Analysis Batch: 108425

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-7 B-2E Total/NA Ground Water 6020A 108000 310-68446-8 B-4E Total/NA Ground Water 6020A 108000

TestAmerica Cedar Falls

Page 103 of 119 11/19/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Metals (Continued) 3 Analysis Batch: 108425 (Continued) 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-8 B-4E Total/NA Ground Water 6020A 108000 5 310-68446-9 B-5E Total/NA Ground Water 6020A 108000 LCS 310-108000/2-A Lab Control Sample Total/NA Water 6020A 108000 6 MB 310-108000/1-A Method Blank Total/NA Water 6020A 108000 Analysis Batch: 108519 7 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 7471B 108308 8 310-68446-2 B-3E 0-1' Total/NA Soil 7471B 108308 310-68446-4 B-4E 0-1' Total/NA Soil 7471B 108308 9 310-68446-5 B-5E 0.5-3' Total/NA Soil 7471B 108308 310-68446-6 B-6E 0-1.4' Total/NA Soil 7471B 108308 10 LCS 310-108308/2-A Lab Control Sample Total/NA Solid 7471B 108308 MB 310-108308/1-A Method Blank Total/NA Solid 7471B 108308 11 Analysis Batch: 109356 12 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' Total/NA Soil 7010 107895 13 310-68446-2 B-3E 0-1' Total/NA Soil 7010 107895 310-68446-4 B-4E 0-1' Total/NA Soil 7010 107895 14 310-68446-5 B-5E 0.5-3' Total/NA Soil 7010 107895 310-68446-6 B-6E 0-1.4' Total/NA Soil 7010 107895 LCS 310-107895/2-A ^2 Lab Control Sample Total/NA Solid 7010 107895 15 MB 310-107895/1-A Method Blank Total/NA Solid 7010 107895

TestAmerica Cedar Falls

Page 104 of 119 11/19/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2

Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 3 Date Collected: 11/04/15 14:55 Matrix: Soil Date Received: 11/06/15 10:00 4 Batch Batch Dilution Batch Prepared 5 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 108046 11/10/15 07:56 EEE TAL CF Total/NA Analysis OA-2 1 108354 11/11/15 19:41 LLS TAL CF 6 7 Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 Date Collected: 11/04/15 14:55 Matrix: Soil 8 Date Received: 11/06/15 10:00 Percent Solids: 88.8

Batch Batch Dilution Batch Prepared 9 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 109247 11/18/15 07:48 TCH TAL CF 10 Total/NA Analysis 8260C 1 109250 11/18/15 12:54 TCH TAL CF Total/NA Prep 3546 108051 11/10/15 08:00 EEE TAL CF 11 Total/NA Analysis 8270D 10 108493 11/12/15 18:50 DMD TAL CF Total/NA Prep 3541 312063 11/10/15 19:00 LLH TAL CHI 12 Total/NA Analysis 8081B 10 312349 11/12/15 19:03 PJG TAL CHI 13 Total/NA Prep 3546 108353 11/12/15 14:00 EEE TAL CF Total/NA Analysis 8082A 1 108703 11/13/15 18:04 BKT TAL CF 14 Total/NA Prep 3050B 107884 11/09/15 10:18 JNR TAL CF Total/NA Analysis 6010C 1 108068 11/09/15 19:13 OAD TAL CF 15 Total/NA Prep 3050B 107895 11/09/15 10:31 JNR TAL CF Total/NA Analysis 7010 4 109356 11/17/15 17:36 AJG TAL CF Total/NA Prep 7471B 108308 11/11/15 10:29 SAD TAL CF Total/NA Analysis 7471B 1 108519 11/12/15 11:11 SAD TAL CF

Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 Date Collected: 11/04/15 13:35 Matrix: Soil Date Received: 11/06/15 10:00

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 108046 11/10/15 07:56 EEE TAL CF Total/NA Analysis OA-2 1 108354 11/11/15 19:55 LLS TAL CF

Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 Date Collected: 11/04/15 13:35 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 92.5

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 108051 11/10/15 08:00 EEE TAL CF Total/NA Analysis 8270D 10 108493 11/12/15 20:28 DMD TAL CF Total/NA Prep 3541 312063 11/10/15 19:00 LLH TAL CHI Total/NA Analysis 8081B 10 312349 11/12/15 19:24 PJG TAL CHI Total/NA Prep 3546 108353 11/12/15 14:00 EEE TAL CF Total/NA Analysis 8082A 1 108703 11/13/15 18:15 BKT TAL CF Total/NA Prep 3050B 107884 11/09/15 10:18 JNR TAL CF

TestAmerica Cedar Falls

Page 105 of 119 11/19/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 3 Date Collected: 11/04/15 13:35 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 92.5 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Analysis 6010C 3 108068 11/09/15 19:43 OAD TAL CF Total/NA Prep 3050B 107895 11/09/15 10:31 JNR TAL CF 6 Total/NA Analysis 7010 4 109356 11/17/15 17:40 AJG TAL CF 7 Total/NA Prep 7471B 108308 11/11/15 10:29 SAD TAL CF Total/NA Analysis 7471B 1 108519 11/12/15 11:12 SAD TAL CF 8 Client Sample ID: B-3E 1-2' Lab Sample ID: 310-68446-3 9 Date Collected: 11/04/15 13:40 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 84.9 10 Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 11 Total/NA Prep 5030B 107903 11/09/15 10:48 TCH TAL CF Total/NA Analysis 8260C 1 107904 11/09/15 18:37 TCH TAL CF 12 13 Client Sample ID: B-4E 0-1' Lab Sample ID: 310-68446-4 Date Collected: 11/04/15 11:05 Matrix: Soil 14 Date Received: 11/06/15 10:00

Batch Batch Dilution Batch Prepared 15 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 108046 11/10/15 07:56 EEE TAL CF Total/NA Analysis OA-2 1 108354 11/11/15 19:13 LLS TAL CF

Client Sample ID: B-4E 0-1' Lab Sample ID: 310-68446-4 Date Collected: 11/04/15 11:05 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 89.9

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107903 11/09/15 10:48 TCH TAL CF Total/NA Analysis 8260C 1 107904 11/09/15 19:02 TCH TAL CF Total/NA Prep 3546 108051 11/10/15 08:00 EEE TAL CF Total/NA Analysis 8270D 10 108493 11/12/15 19:39 DMD TAL CF Total/NA Prep 3541 312063 11/10/15 19:00 LLH TAL CHI Total/NA Analysis 8081B 20 312349 11/12/15 19:44 PJG TAL CHI Total/NA Prep 3546 107873 11/09/15 09:54 EEE TAL CF Total/NA Analysis 8082A 1 108186 11/10/15 16:10 BKT TAL CF Total/NA Prep 3050B 107884 11/09/15 10:18 JNR TAL CF Total/NA Analysis 6010C 1 108068 11/09/15 19:17 OAD TAL CF Total/NA Prep 3050B 107895 11/09/15 10:31 JNR TAL CF Total/NA Analysis 7010 4 109356 11/17/15 17:44 AJG TAL CF Total/NA Prep 7471B 108308 11/11/15 10:29 SAD TAL CF Total/NA Analysis 7471B 1 108519 11/12/15 11:14 SAD TAL CF

TestAmerica Cedar Falls

Page 106 of 119 11/19/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-5E 0.5-3' Lab Sample ID: 310-68446-5 3 Date Collected: 11/04/15 09:45 Matrix: Soil Date Received: 11/06/15 10:00 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Prep 3546 108046 11/10/15 07:56 EEE TAL CF Total/NA Analysis OA-2 1 108354 11/11/15 19:27 LLS TAL CF 6 7 Client Sample ID: B-5E 0.5-3' Lab Sample ID: 310-68446-5 Date Collected: 11/04/15 09:45 Matrix: Soil 8 Date Received: 11/06/15 10:00 Percent Solids: 83.2

Batch Batch Dilution Batch Prepared 9 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 107903 11/09/15 10:48 TCH TAL CF 10 Total/NA Analysis 8260C 1 107904 11/09/15 19:26 TCH TAL CF Total/NA Prep 3546 108051 11/10/15 08:00 EEE TAL CF 11 Total/NA Analysis 8270D 1 108493 11/12/15 20:04 DMD TAL CF Total/NA Prep 3541 312063 11/10/15 19:00 LLH TAL CHI 12 Total/NA Analysis 8081B 1 312349 11/12/15 20:25 PJG TAL CHI Total/NA Prep 3546 107873 11/09/15 09:54 EEE TAL CF 13 Total/NA Analysis 8082A 1 108186 11/10/15 16:21 BKT TAL CF Total/NA Prep 3050B 107884 11/09/15 10:18 JNR TAL CF 14 Total/NA Analysis 6010C 1 108068 11/09/15 19:19 OAD TAL CF 15 Total/NA Prep 3050B 107895 11/09/15 10:31 JNR TAL CF Total/NA Analysis 7010 4 109356 11/17/15 17:48 AJG TAL CF Total/NA Prep 7471B 108308 11/11/15 10:29 SAD TAL CF Total/NA Analysis 7471B 1 108519 11/12/15 11:15 SAD TAL CF

Client Sample ID: B-6E 0-1.4' Lab Sample ID: 310-68446-6 Date Collected: 11/04/15 08:35 Matrix: Soil Date Received: 11/06/15 10:00

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 3546 108046 11/10/15 07:56 EEE TAL CF Total/NA Analysis OA-2 1 108354 11/11/15 20:09 LLS TAL CF

Client Sample ID: B-6E 0-1.4' Lab Sample ID: 310-68446-6 Date Collected: 11/04/15 08:35 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 87.1

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Prep 5030B 109058 11/17/15 07:37 TCH TAL CF Total/NA Analysis 8260C 1 109055 11/17/15 17:27 TCH TAL CF Total/NA Prep 3546 108051 11/10/15 08:00 EEE TAL CF Total/NA Analysis 8270D 100 108493 11/12/15 19:15 DMD TAL CF Total/NA Prep 3541 312063 11/10/15 19:00 LLH TAL CHI Total/NA Analysis 8081B 20 312349 11/12/15 20:46 PJG TAL CHI Total/NA Prep 3546 107873 11/09/15 09:54 EEE TAL CF

TestAmerica Cedar Falls

Page 107 of 119 11/19/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-6E 0-1.4' Lab Sample ID: 310-68446-6 3 Date Collected: 11/04/15 08:35 Matrix: Soil Date Received: 11/06/15 10:00 Percent Solids: 87.1 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Analysis 8082A 1 108186 11/10/15 16:33 BKT TAL CF Total/NA Prep 3050B 107884 11/09/15 10:18 JNR TAL CF 6 Total/NA Analysis 6010C 2 108068 11/09/15 19:47 OAD TAL CF 7 Total/NA Prep 3050B 107895 11/09/15 10:31 JNR TAL CF Total/NA Analysis 7010 4 109356 11/17/15 17:52 AJG TAL CF 8 Total/NA Prep 7471B 108308 11/11/15 10:29 SAD TAL CF Total/NA Analysis 7471B 1 108519 11/12/15 11:17 SAD TAL CF 9

Client Sample ID: B-2E Lab Sample ID: 310-68446-7 10 Date Collected: 11/05/15 08:55 Matrix: Ground Water Date Received: 11/06/15 10:00 11

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 12 Total/NA Analysis 8260C 1 108840 11/16/15 10:57 SJN TAL CF 13 Total/NA Prep 3510C 108193 11/11/15 14:30 EEE TAL CF Total/NA Analysis 8270D 1 108902 11/16/15 14:06 DMD TAL CF 14 Total/NA Prep 3510C 108089 11/10/15 09:46 EEE TAL CF Total/NA Analysis 8081B 1 108293 11/11/15 16:19 BKT TAL CF 15 Total/NA Prep 3510C 108090 11/10/15 09:48 EEE TAL CF Total/NA Analysis 8082A 1 108284 11/11/15 16:01 BKT TAL CF Total/NA Prep 3510C 108191 11/11/15 14:26 EEE TAL CF Total/NA Analysis OA-2 1 108707 11/13/15 23:14 LLS TAL CF Total/NA Prep 3010A 108000 11/10/15 18:21 JNR TAL CF Total/NA Analysis 6020A 1 108425 11/11/15 14:33 OAD TAL CF Total/NA Prep 7470A 108160 11/10/15 13:12 SAD TAL CF Total/NA Analysis 7470A 1 108343 11/11/15 10:50 SAD TAL CF

Client Sample ID: B-4E Lab Sample ID: 310-68446-8 Date Collected: 11/05/15 11:00 Matrix: Ground Water Date Received: 11/06/15 10:00

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Analysis 8260C 1 108662 11/14/15 08:51 SJN TAL CF Total/NA Prep 3510C 108193 11/11/15 14:30 EEE TAL CF Total/NA Analysis 8270D 1 108902 11/16/15 16:55 DMD TAL CF Total/NA Prep 3510C 108089 11/10/15 09:46 EEE TAL CF Total/NA Analysis 8081B 1 108472 11/12/15 12:09 BKT TAL CF Total/NA Prep 3510C 108090 11/10/15 09:48 EEE TAL CF Total/NA Analysis 8082A 1 108284 11/11/15 16:12 BKT TAL CF Total/NA Prep 3510C 108191 11/11/15 14:26 EEE TAL CF Total/NA Analysis OA-2 1 108707 11/13/15 23:29 LLS TAL CF Total/NA Prep 3010A 108000 11/10/15 18:21 JNR TAL CF Total/NA Analysis 6020A 1 108425 11/11/15 14:36 OAD TAL CF

TestAmerica Cedar Falls

Page 108 of 119 11/19/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-4E Lab Sample ID: 310-68446-8 3 Date Collected: 11/05/15 11:00 Matrix: Ground Water Date Received: 11/06/15 10:00 4

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab 5 Total/NA Prep 3010A 108000 11/10/15 18:21 JNR TAL CF Total/NA Analysis 6020A 3 108425 11/11/15 15:19 OAD TAL CF 6 Total/NA Prep 7470A 108160 11/10/15 13:12 SAD TAL CF Total/NA Analysis 7470A 1 108343 11/11/15 10:51 SAD TAL CF 7 8 Client Sample ID: B-5E Lab Sample ID: 310-68446-9 Date Collected: 11/05/15 13:10 Matrix: Ground Water 9 Date Received: 11/06/15 10:00

Batch Batch Dilution Batch Prepared 10 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Analysis 8260C 1 108662 11/14/15 08:26 SJN TAL CF 11 Total/NA Prep 3510C 108193 11/11/15 14:30 EEE TAL CF Total/NA Analysis 8270D 1 108902 11/16/15 17:19 DMD TAL CF 12 Total/NA Prep 3510C 108089 11/10/15 09:46 EEE TAL CF Total/NA Analysis 8081B 1 108293 11/11/15 16:45 BKT TAL CF 13 Total/NA Prep 3510C 108090 11/10/15 09:48 EEE TAL CF Total/NA Analysis 8082A 1 108284 11/11/15 16:22 BKT TAL CF 14 Total/NA Prep 3510C 108191 11/11/15 14:26 EEE TAL CF 15 Total/NA Analysis OA-2 1 108707 11/13/15 23:43 LLS TAL CF Total/NA Prep 3010A 108000 11/10/15 18:21 JNR TAL CF Total/NA Analysis 6020A 1 108425 11/11/15 14:39 OAD TAL CF Total/NA Prep 7470A 108160 11/10/15 13:12 SAD TAL CF Total/NA Analysis 7470A 1 108343 11/11/15 10:53 SAD TAL CF

Client Sample ID: Trip Blank Lab Sample ID: 310-68446-10 Date Collected: 11/04/15 00:00 Matrix: Water Date Received: 11/06/15 10:00

Batch Batch Dilution Batch Prepared Prep Type Type Method Run Factor Number or Analyzed Analyst Lab Total/NA Analysis 8260C 1 108662 11/14/15 08:00 SJN TAL CF

Laboratory References: TAL CF = TestAmerica Cedar Falls, 704 Enterprise Drive, Cedar Falls, IA 50613, TEL (319)277-2401 TAL CHI = TestAmerica Chicago, 2417 Bond Street, University Park, IL 60484, TEL (708)534-5200

TestAmerica Cedar Falls

Page 109 of 119 11/19/2015 Certification Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Laboratory: TestAmerica Cedar Falls All certifications held by this laboratory are listed. Not all certifications are applicable to this report. 3

Authority Program EPA Region Certification ID Expiration Date 4 AIHA-LAP, LLC IHLAP 101044 11-01-16 Georgia State Program 4 N/A 09-29-16 5 Illinois NELAP 5 200024 11-29-15 * Iowa State Program 7 007 12-01-15 * 6 Kansas NELAP 7 E-10341 01-31-15 * Minnesota NELAP 5 019-999-319 12-31-15 7 Minnesota (Petrofund) State Program 1 3349 08-22-16 North Dakota State Program 8 R-186 09-29-16 8 Oregon NELAP 10 IA100001 09-29-16 Wisconsin State Program 5 999917270 08-31-16 9 Laboratory: TestAmerica Chicago All certifications held by this laboratory are listed. Not all certifications are applicable to this report. 10 Authority Program EPA Region Certification ID Expiration Date 11 Alabama State Program 4 40461 04-30-16 California State Program 9 2903 04-30-16 12 Georgia State Program 4 N/A 04-30-16 Georgia State Program 4 939 04-30-16 Hawaii State Program 9 N/A 04-30-16 13 Illinois NELAP 5 100201 04-30-16 Indiana State Program 5 C-IL-02 04-30-16 14 Iowa State Program 7 82 05-01-16 Kansas NELAP 7 E-10161 01-31-16 * 15 Kentucky (UST) State Program 4 66 04-30-16 Kentucky (WW) State Program 4 KY90023 12-31-15 * Massachusetts State Program 1 M-IL035 06-30-16 Mississippi State Program 4 N/A 04-30-16 New York NELAP 2 IL00035 04-01-16 North Carolina (WW/SW) State Program 4 291 12-31-15 * North Dakota State Program 8 R-194 04-30-16 Oklahoma State Program 6 8908 08-31-16 South Carolina State Program 4 77001 04-30-16 USDA Federal P330-15-00038 02-11-18 Wisconsin State Program 5 999580010 08-31-16 Wyoming State Program 8 8TMS-Q 04-30-16

* Certification renewal pending - certification considered valid. TestAmerica Cedar Falls

Page 110 of 119 11/19/2015 Method Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 3 Method Method Description Protocol Laboratory 8260C Volatile Organic Compounds by GC/MS SW846 TAL CF 8270D Semivolatile Organic Compounds (GC/MS) SW846 TAL CF 4 8081B Organochlorine Pesticides (GC) SW846 TAL CF 8081B Organochlorine Pesticides (GC) SW846 TAL CHI 5 8082A Polychlorinated Biphenyls (PCBs) by Gas Chromatography SW846 TAL CF OA-2 Iowa - Extractable Petroleum Hydrocarbons (GC) Iowa DNR TAL CF 6 6010C Metals (ICP) SW846 TAL CF 6020A Metals (ICP/MS) SW846 TAL CF 7 7010 Metals (GFAA) SW846 TAL CF 7470A Mercury (CVAA) SW846 TAL CF 8 7471B Mercury (CVAA) SW846 TAL CF 9 Protocol References: Iowa DNR = Iowa Department of Natural Resources 10 SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates. 11 Laboratory References: TAL CF = TestAmerica Cedar Falls, 704 Enterprise Drive, Cedar Falls, IA 50613, TEL (319)277-2401 12 TAL CHI = TestAmerica Chicago, 2417 Bond Street, University Park, IL 60484, TEL (708)534-5200 13 14 15

TestAmerica Cedar Falls

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Page 117 of 119 11/19/2015 1 Login Sample Receipt Checklist 2

Client: Thiele Geotech Inc. Job Number: 310-68446-1 3 SDG Number: 15428.01 4 Login Number: 68446 List Source: TestAmerica Cedar Falls List Number: 1 Creator: Muehling, Angela C 5 Question Answer Comment 6 Radioactivity wasn't checked or is

TestAmerica Cedar Falls Page 118 of 119 11/19/2015 1 Login Sample Receipt Checklist 2

Client: Thiele Geotech Inc. Job Number: 310-68446-1 3 SDG Number: 15428.01 4 Login Number: 68446 List Source: TestAmerica Chicago List Number: 2 List Creation: 11/10/15 11:33 AM Creator: Sanchez, Ariel M 5 Question Answer Comment 6 Radioactivity wasn't checked or is

TestAmerica Cedar Falls Page 119 of 119 11/19/2015 1 2 3 4 5 ANALYTICAL REPORT 6 TestAmerica Laboratories, Inc. TestAmerica Cedar Falls 7 704 Enterprise Drive Cedar Falls, IA 50613 8 Tel: (319)277-2401 9 TestAmerica Job ID: 310-68446-2 TestAmerica Sample Delivery Group: 15428.01 10 Client Project/Site: 18th St Bridge - Sioux City, IA 11 For: Thiele Geotech Inc. 12 13478 Chandler Road Omaha, Nebraska 68138 13

Attn: Robert Miller 14

Authorized for release by: 12/2/2015 1:41:31 PM Angela Muehling, Project Manager I (319)277-2401 [email protected]

This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature.

Results relate only to the items tested and the sample(s) as received by the laboratory. Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 1 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Table of Contents Cover Page ...... 1 3 Table of Contents ...... 2 4 3 Case Narrative ...... 5 Sample Summary ...... 4 Detection Summary ...... 5 6 Client Sample Results ...... 6 7 Definitions ...... 8 8 QC Sample Results ...... 9 QC Association ...... 10 9 Chronicle ...... 11 10 Certification Summary ...... 12 Method Summary ...... 13 11 Chain of Custody ...... 14 12 Receipt Checklists ...... 15 13 14

TestAmerica Cedar Falls Page 2 of 15 12/2/2015 Case Narrative 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Job ID: 310-68446-2 3 Laboratory: TestAmerica Cedar Falls 4 Narrative Job Narrative 5 310-68446-2 6 Comments No additional comments. 7 Receipt The samples were received on 11/6/2015 10:00 AM; the samples arrived in good condition, properly preserved and, where required, on 8 ice. The temperatures of the 3 coolers at receipt time were 1.1º C, 2.2º C and 2.4º C. 9 Metals No analytical or quality issues were noted, other than those described in the Definitions/Glossary page. 10 Organic Prep 11 Method(s) 1311: EPA Method 1311 requires the room temperature to be maintained at 23 +/- 2 degrees Celsius for the duration of the leaching process. For batch 110401, the temperature 18.7 - 21.9 degrees Celsius was outside of this range. 12 No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page. 13 14

TestAmerica Cedar Falls Page 3 of 15 12/2/2015 Sample Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 3 Lab Sample ID Client Sample ID Matrix Collected Received 310-68446-1 B-2E 0-1.5' Soil 11/04/15 14:55 11/06/15 10:00 310-68446-2 B-3E 0-1' Soil 11/04/15 13:35 11/06/15 10:00 4 5 6 7 8 9 10 11 12 13 14

TestAmerica Cedar Falls

Page 4 of 15 12/2/2015 Detection Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 3 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type 4 Barium 0.815 0.500 mg/L 1 6010C TCLP Lead 9.41 0.100 mg/L 1 6010C TCLP 5 Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 6 Analyte Result Qualifier RL MDL Unit Dil Fac D Method Prep Type Barium 0.616 0.500 mg/L 1 6010C TCLP 7 Lead 0.142 0.100 mg/L 1 6010C TCLP 8 9 10 11 12 13 14

This Detection Summary does not include radiochemical test results. TestAmerica Cedar Falls

Page 5 of 15 12/2/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 3 Date Collected: 11/04/15 14:55 Matrix: Soil Date Received: 11/06/15 10:00 4 Method: 6010C - Metals (ICP) - TCLP Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Arsenic <0.300 0.300 mg/L 12/01/15 12:14 12/02/15 11:14 1 Barium 0.815 0.500 mg/L 12/01/15 12:14 12/02/15 11:14 1 6 Cadmium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 11:14 1 Chromium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 11:14 1 7 Lead 9.41 0.100 mg/L 12/01/15 12:14 12/02/15 11:14 1 Selenium <0.150 0.150 mg/L 12/01/15 12:14 12/02/15 11:14 1 8 Silver <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 11:14 1 9 Method: 7470A - Mercury (CVAA) - TCLP Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.00200 0.00200 mg/L 12/01/15 12:35 12/01/15 15:43 1 10 11 12 13 14

TestAmerica Cedar Falls

Page 6 of 15 12/2/2015 Client Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 3 Date Collected: 11/04/15 13:35 Matrix: Soil Date Received: 11/06/15 10:00 4 Method: 6010C - Metals (ICP) - TCLP Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac 5 Arsenic <0.300 0.300 mg/L 12/01/15 12:14 12/02/15 11:19 1 Barium 0.616 0.500 mg/L 12/01/15 12:14 12/02/15 11:19 1 6 Cadmium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 11:19 1 Chromium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 11:19 1 7 Lead 0.142 0.100 mg/L 12/01/15 12:14 12/02/15 11:19 1 Selenium <0.150 0.150 mg/L 12/01/15 12:14 12/02/15 11:19 1 8 Silver <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 11:19 1 9 Method: 7470A - Mercury (CVAA) - TCLP Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.00200 0.00200 mg/L 12/01/15 12:35 12/01/15 15:45 1 10 11 12 13 14

TestAmerica Cedar Falls

Page 7 of 15 12/2/2015 Definitions/Glossary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Glossary 3

Abbreviation These commonly used abbreviations may or may not be present in this report. ¤ Listed under the "D" column to designate that the result is reported on a dry weight basis 4 %R Percent Recovery CFL Contains Free Liquid 5 CNF Contains no Free Liquid DER Duplicate error ratio (normalized absolute difference) 6 Dil Fac Dilution Factor DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample 7 DLC Decision level concentration MDA Minimum detectable activity 8 EDL Estimated Detection Limit MDC Minimum detectable concentration 9 MDL Method Detection Limit ML Minimum Level (Dioxin) 10 NC Not Calculated ND Not detected at the reporting limit (or MDL or EDL if shown) 11 PQL Practical Quantitation Limit QC Quality Control RER Relative error ratio 12 RL Reporting Limit or Requested Limit (Radiochemistry) RPD Relative Percent Difference, a measure of the relative difference between two points 13 TEF Toxicity Equivalent Factor (Dioxin) TEQ Toxicity Equivalent Quotient (Dioxin) 14

TestAmerica Cedar Falls

Page 8 of 15 12/2/2015 QC Sample Results 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Method: 6010C - Metals (ICP) 3 Lab Sample ID: LB 310-110401/1-B Client Sample ID: Method Blank 4 Matrix: Solid Prep Type: TCLP Analysis Batch: 110921 Prep Batch: 110762 LB LB 5 Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Arsenic <0.300 0.300 mg/L 12/01/15 12:14 12/02/15 10:52 1 6 Barium <0.500 0.500 mg/L 12/01/15 12:14 12/02/15 10:52 1 Cadmium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 10:52 1 7 Chromium <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 10:52 1 Lead <0.100 0.100 mg/L 12/01/15 12:14 12/02/15 10:52 1 8 Selenium <0.150 0.150 mg/L 12/01/15 12:14 12/02/15 10:52 1 Silver <0.0200 0.0200 mg/L 12/01/15 12:14 12/02/15 10:52 1 9 Lab Sample ID: LCS 310-110401/2-B Client Sample ID: Lab Control Sample 10 Matrix: Solid Prep Type: TCLP Analysis Batch: 110921 Prep Batch: 110762 Spike LCS LCS %Rec. 11 Analyte Added Result Qualifier Unit D %Rec Limits Arsenic 4.00 4.299 mg/L 107 80 - 120 12 Barium 2.00 1.971 mg/L 99 80 - 120 Cadmium 2.00 1.995 mg/L 100 80 - 120 13 Chromium 2.00 2.079 mg/L 104 80 - 120 Lead 4.00 3.777 mg/L 94 80 - 120 14 Selenium 8.00 8.940 mg/L 112 80 - 120 Silver 2.00 2.140 mg/L 107 80 - 120

Lab Sample ID: 310-68446-2 MS Client Sample ID: B-3E 0-1' Matrix: Soil Prep Type: TCLP Analysis Batch: 110921 Prep Batch: 110762 Sample Sample Spike MS MS %Rec. Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits Arsenic <0.300 4.00 3.995 mg/L 100 75 - 125 Barium 0.616 2.00 2.316 mg/L 85 75 - 125 Cadmium <0.0200 2.00 1.806 mg/L 90 75 - 125 Chromium <0.0200 2.00 1.857 mg/L 93 75 - 125 Lead 0.142 4.00 3.504 mg/L 84 75 - 125 Selenium <0.150 8.00 8.369 mg/L 104 75 - 125 Silver <0.0200 2.00 1.974 mg/L 99 75 - 125

Method: 7470A - Mercury (CVAA)

Lab Sample ID: LB 310-110401/1-C Client Sample ID: Method Blank Matrix: Solid Prep Type: TCLP Analysis Batch: 110814 Prep Batch: 110765 LB LB Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac Mercury <0.00200 0.00200 mg/L 12/01/15 12:35 12/01/15 15:39 1

Lab Sample ID: LCS 310-110401/2-C Client Sample ID: Lab Control Sample Matrix: Solid Prep Type: TCLP Analysis Batch: 110814 Prep Batch: 110765 Spike LCS LCS %Rec. Analyte Added Result Qualifier Unit D %Rec Limits Mercury 0.0167 0.01801 mg/L 108 80 - 120 TestAmerica Cedar Falls

Page 9 of 15 12/2/2015 QC Association Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Metals 3 Leach Batch: 110401 4 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' TCLP Soil 1311 5 310-68446-2 B-3E 0-1' TCLP Soil 1311 310-68446-2 MS B-3E 0-1' TCLP Soil 1311 6 LB 310-110401/1-B Method Blank TCLP Solid 1311 LB 310-110401/1-C Method Blank TCLP Solid 1311 LCS 310-110401/2-B Lab Control Sample TCLP Solid 1311 7 LCS 310-110401/2-C Lab Control Sample TCLP Solid 1311 8 Prep Batch: 110762

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 9 310-68446-1 B-2E 0-1.5' TCLP Soil 3010A 110401 310-68446-2 B-3E 0-1' TCLP Soil 3010A 110401 10 310-68446-2 MS B-3E 0-1' TCLP Soil 3010A 110401 LB 310-110401/1-B Method Blank TCLP Solid 3010A 110401 11 LCS 310-110401/2-B Lab Control Sample TCLP Solid 3010A 110401

Prep Batch: 110765 12 Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 13 310-68446-1 B-2E 0-1.5' TCLP Soil 7470A 110401 310-68446-2 B-3E 0-1' TCLP Soil 7470A 110401 14 LB 310-110401/1-C Method Blank TCLP Solid 7470A 110401 LCS 310-110401/2-C Lab Control Sample TCLP Solid 7470A 110401

Analysis Batch: 110814

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' TCLP Soil 7470A 110765 310-68446-2 B-3E 0-1' TCLP Soil 7470A 110765 LB 310-110401/1-C Method Blank TCLP Solid 7470A 110765 LCS 310-110401/2-C Lab Control Sample TCLP Solid 7470A 110765

Analysis Batch: 110921

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch 310-68446-1 B-2E 0-1.5' TCLP Soil 6010C 110762 310-68446-2 B-3E 0-1' TCLP Soil 6010C 110762 310-68446-2 MS B-3E 0-1' TCLP Soil 6010C 110762 LB 310-110401/1-B Method Blank TCLP Solid 6010C 110762 LCS 310-110401/2-B Lab Control Sample TCLP Solid 6010C 110762

TestAmerica Cedar Falls

Page 10 of 15 12/2/2015 Lab Chronicle 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2

Client Sample ID: B-2E 0-1.5' Lab Sample ID: 310-68446-1 3 Date Collected: 11/04/15 14:55 Matrix: Soil Date Received: 11/06/15 10:00 4 Batch Batch Dilution Batch Prepared 5 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab TCLP Leach 1311 110401 11/30/15 11:51 EEE TAL CF TCLP Prep 3010A 110762 12/01/15 12:14 JNR TAL CF 6 TCLP Analysis 6010C 1 110921 12/02/15 11:14 OAD TAL CF 7 TCLP Leach 1311 110401 11/30/15 11:51 EEE TAL CF TCLP Prep 7470A 110765 12/01/15 12:35 SAD TAL CF TCLP Analysis 7470A 1 110814 12/01/15 15:43 SAD TAL CF 8 9 Client Sample ID: B-3E 0-1' Lab Sample ID: 310-68446-2 Date Collected: 11/04/15 13:35 Matrix: Soil 10 Date Received: 11/06/15 10:00

Batch Batch Dilution Batch Prepared 11 Prep Type Type Method Run Factor Number or Analyzed Analyst Lab TCLP Leach 1311 110401 11/30/15 11:51 EEE TAL CF 12 TCLP Prep 3010A 110762 12/01/15 12:14 JNR TAL CF TCLP Analysis 6010C 1 110921 12/02/15 11:19 OAD TAL CF 13 TCLP Leach 1311 110401 11/30/15 11:51 EEE TAL CF TCLP Prep 7470A 110765 12/01/15 12:35 SAD TAL CF 14 TCLP Analysis 7470A 1 110814 12/01/15 15:45 SAD TAL CF

Laboratory References: TAL CF = TestAmerica Cedar Falls, 704 Enterprise Drive, Cedar Falls, IA 50613, TEL (319)277-2401

TestAmerica Cedar Falls

Page 11 of 15 12/2/2015 Certification Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 Laboratory: TestAmerica Cedar Falls All certifications held by this laboratory are listed. Not all certifications are applicable to this report. 3

Authority Program EPA Region Certification ID Expiration Date 4 AIHA-LAP, LLC IHLAP 101044 11-01-16 Georgia State Program 4 N/A 09-29-16 5 Illinois NELAP 5 200024 11-29-16 Iowa State Program 7 007 12-01-15 * 6 Kansas NELAP 7 E-10341 01-31-15 * Minnesota NELAP 5 019-999-319 12-31-15 7 Minnesota (Petrofund) State Program 1 3349 08-22-16 North Dakota State Program 8 R-186 09-29-16 8 Oregon NELAP 10 IA100001 09-29-16 Wisconsin State Program 5 999917270 08-31-16 9 10 11 12 13 14

* Certification renewal pending - certification considered valid. TestAmerica Cedar Falls

Page 12 of 15 12/2/2015 Method Summary 1 Client: Thiele Geotech Inc. TestAmerica Job ID: 310-68446-2 Project/Site: 18th St Bridge - Sioux City, IA SDG: 15428.01 2 3 Method Method Description Protocol Laboratory 6010C Metals (ICP) SW846 TAL CF 7470A Mercury (CVAA) SW846 TAL CF 4

Protocol References: 5 SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates. 6 Laboratory References: TAL CF = TestAmerica Cedar Falls, 704 Enterprise Drive, Cedar Falls, IA 50613, TEL (319)277-2401 7 8 9 10 11 12 13 14

TestAmerica Cedar Falls

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Page 14 of 15 12/2/2015 1 Login Sample Receipt Checklist 2

Client: Thiele Geotech Inc. Job Number: 310-68446-2 3 SDG Number: 15428.01 4 Login Number: 68446 List Source: TestAmerica Cedar Falls List Number: 1 Creator: Muehling, Angela C 5 Question Answer Comment 6 Radioactivity wasn't checked or is

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