Second Quarter 2017 Site Investigation Data Report Former Ivy’s Jiffy Market Site Madras, Oregon ECSI No. 5845

Prepared for: Oregon Department of Environmental Quality Task Order No. 20-13-21

June 27, 2017 2103-00/Task 4

Table of Contents

1.0 INTRODUCTION ...... 1 1.1 Purpose ...... 1 1.2 Scope of Work ...... 1 2.0 BACKGROUND ...... 2 2.1 Site Location and Description ...... 2 2.2 Previous Investigations ...... 2 2.3 Other Impacted Sites ...... 4 2.4 Geology and Hydrogeology ...... 5 3.0 PRE-INVESTIGATION ACTIVITIES ...... 6 4.0 FIELD ACTIVITIES AND FINDINGS ...... 7 4.1 Groundwater Monitoring ...... 7 4.2 Soil Vapor Monitoring ...... 8 4.3 SVE System Operation ...... 8 5.0 CHEMICAL ANALYSES AND RESULTS ...... 9 5.1 Analyses Performed ...... 9 5.2 Chemical Results and Observations...... 9 6.0 RISK-BASED SCREENING ...... 11 6.1 Analytical Data and Risk-Based Screening: Groundwater...... 11 6.2 Analytical Data and Risk-Based Screening: Soil Vapor ...... 11 6.3 Air Discharge Risk-Based Screening and Compliance ...... 11 7.0 CONCLUSIONS AND RECOMMENDATIONS ...... 12 7.1 Recommendations for Additional Work ...... 12 8.0 REFERENCES ...... 13

Tables

1 Groundwater Elevations and Field Parameters 2 Groundwater Sample Analytical Results 3 SVE System Monitoring 4 SVE System Analytical Results 5 Soil Vapor Analytical Results

Figures

1 Site Location Map 2 Site and Exploration Plan 3 Groundwater Elevations 4 Petroleum Hydrocarbons in Groundwater

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Appendix

A Laboratory Analytical Report and Data Quality Review

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1.0 Introduction

This Site Investigation Data Report (Report) describes the field activities and presents the results of the groundwater sampling completed in May 2017 at the former Ivy’s Jiffy Market site located at 40 NW Fourth Street in Madras, Oregon (the Site). This work was done subsequent to the initiation of the Corrective Action activities (discussed in the Corrective Action Implementation Report; Apex, 2016), and was done in accordance with the Site Investigation Work Plan (Apex, 2014b) and the Supplemental Site Investigation Work Plan (Apex, 2014c). This work was conducted for the Oregon Department of Environmental Quality (DEQ) under Task 4 of Task Order No. 20-13-21.

1.1 Purpose

The purpose of this work was to obtain additional chemical constituent data (from groundwater and soil vapor at and near the Site) that can be used to assess potential risks posed by the Site to human health and the environment, and to document the effectiveness of the Corrective Action system that began operation in June 2016.

1.2 Scope of Work

The scope of work included in the Work Plan consisted of the following tasks:

1) Implement quarterly groundwater monitoring and separate-phase petroleum hydrocarbon (SPH) recovery (measurement of water and SPH levels in each of 18 groundwater monitoring wells, collection of groundwater samples from wells without SPH, and removal of SPH from wells);

2) Analyze collected groundwater samples for total petroleum hydrocarbons (TPH) as gasoline (TPHg) and volatile organic compounds (VOCs);

3) Continue operation of the corrective action soil vapor extraction (SVE) system, including periodic system sample collection and analysis;

4) Periodic soil vapor sampling; and 5) Prepare a data summary report that discusses the monitoring activities, analytical results and findings, system operation, and an evaluation of potential risk based on investigation results.

These activities are discussed in further detail within this report.

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2.0 Background

This section presents a description of the Site, the anticipated geology and hydrogeology, and previous work done at the Site. Historical information was obtained from the Environmental Site Investigation report previously prepared for the Site (Osprey, 2009).

2.1 Site Location and Description

The Site is in the City of Madras in the northwest corner of the intersection of Fourth Street (Hwy 26/97) and “B” Street, at an elevation of approximately 2,238 feet above mean sea level (MSL; Figures 1 and 2). The Site is located in the SE 1/4 of the SE 1/4 of Section 2 of Township 11 South, Range 13 East, Willamette Meridian, in Jefferson County, Oregon (tax lots 1300 and 1302). The Site is bounded to the north by a Carson Oil Company CFN Card Lock, to the east by Fourth Street and a former car dealership and service station (Opportunity Foundation property), to the south by “B” Street and a motel (Best Western Madras Inn), and to the west by a mobile home park (Willow Creek Mobile Home Park [Willow Creek]). The Site was developed as a market in 1963. Fuel tanks and associated equipment were added in 1982 (including one 10,000-gallon underground storage tank [UST] and one 12,000-gallon UST). The tanks were decommissioned in 1998 and the property continued to be used as a market until about 2003 when the property was converted for use as a used vehicle sales lot.

2.2 Previous Investigations

The following environmental assessments and UST removal actions have occurred at the Site.

• In May 1991, a line failure was identified in the delivery line to the regular gasoline fuel pump. Several cubic yards of petroleum-impacted soil were removed under DEQ oversight and the delivery lines from each of the fuel tanks were replaced with new fiberglass lines.

• In December 1997, soil impacted by petroleum hydrocarbons was discovered during a subsurface geoprobe investigation. Nine explorations were completed, and four samples collected from the vicinity of the USTs were impacted by up to 1,500 milligrams per kilogram (mg/kg) of total TPHg. Samples collected from along the northern and easterly property boundaries (at depths of 13 feet below ground surface [bgs]) had no detected concentrations of TPH.

• Between January and March 1998, two USTs and associated infrastructure were decommissioned by removal. A total of about 659 tons of petroleum-impacted soil was removed from the Site and disposed of. The impacted soil was encountered between the depths of 13 and 20 feet bgs (the depth of the groundwater table at the time of the excavation). The excavation was backfilled in May/June 1998 (with a layer of visqueen sheeting placed as an excavation demarcation layer).

• In January 1999, six borings (IB1 through IB6) were advanced to depths ranging from 21 to 32 feet bgs. Petroleum impacts were detected in the three boring locations nearest the northern property boundary (at depths ranging from 19.5 to 31 feet bgs), with concentrations generally

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increasing with depth. Four groundwater monitoring wells were installed during this investigation (MW-1 through MW-4), with screens extending from 15 to 25 feet bgs. Depths to water shortly after installation were between 20 and 22 feet bgs. Petroleum hydrocarbons were detected in each of the four wells, with the highest concentrations found in wells MW-2 and MW-4 (benzene concentrations as high as 27,600 micrograms per liter [µg/L] and 25,300 µg/L for these wells, respectively).

• In November 2008, five geoprobe explorations were completed at the Site to provide information regarding vertical extent and six groundwater monitoring wells were installed (MW-5 through MW-10; 0.75-inch-diameter wells installed with screens extending from 25 to 45 feet bgs). These wells were installed in response to a regional lowering of the groundwater table that occurred after the first four monitoring wells were installed (observed initially in 2001). Petroleum hydrocarbons (including SPH) were identified in wells MW-5 through MW-9 at thicknesses ranging from a sheen to several inches. Groundwater elevations remained low and monitoring wells MW-1 through MW-4 were dry until 2011 when regional water elevations began to rise.

• A program of routine groundwater monitoring was completed at the Site through the fall of 2012. In the most recent monitoring report (Osprey, 2012), it was noted that SPH was encountered in wells MW-5 and MW-6 (with a thickness of about 5.7 feet in MW-5) and that groundwater elevations had risen so that groundwater was encountered in wells MW-1 through MW-4.

• A program of groundwater monitoring and SPH recovery was initiated by the DEQ, with the first event occurring in December 2013.

• A Site investigation was completed by the DEQ in May 2014, including the installation and sampling of seven groundwater monitoring wells (one upgradient on-site well and six downgradient off-site wells). Impacts from gasoline-range hydrocarbons and petroleum-related VOCs were found to be present at the Site and extending north-northwest (downgradient) off-site beneath the adjacent mobile home park (both dissolved-phase hydrocarbons and SPH). SPH and observed concentrations of benzene in groundwater were found above the vapor intrusion risk-based concentrations (RBCs) for residential and occupational uses, suggesting that exposures may occur at unacceptable concentrations. Additional investigation was recommended to define the extent of petroleum hydrocarbons to the north and northwest of the Site and to assess the potential for unacceptable vapor exposures.

• In September 2014, a supplemental site investigation (SSI) was completed to address data gaps encountered during the prior work. Tasks included the installation of two additional groundwater monitoring wells (to define the northern extent of the groundwater contamination plume), the installation and sampling of four soil vapor monitoring points, the inclusion of monitored natural attenuation parameters in one round of groundwater monitoring, and the completion of a pilot study of potentially applicable remediation technologies (SVE), air sparging, and dual-phase extraction [DPE]). As a result of completing the SSI, the downgradient extent of the dissolved-phase petroleum hydrocarbon plume was defined and generally extends from the vicinity of the Site building off-site to the northwest (beneath several residents of the adjacent mobile home park, but does not continue

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westward beyond 3rd Street, nor does it impact the vicinity of Willow Creek to the north). Soil vapor samples collected from the vicinity of the Site building and downgradient residential receptors were not impacted by hydrocarbons above the soil gas RBCs. Natural attenuation of the petroleum hydrocarbons is occurring at the Site (aerobically to the extent that oxygen is available and anaerobically through the bulk of the source area and downgradient), though the rate of biodegradation is likely limited by a scarcity of naturally occurring nitrates in groundwater. The implementation of enhanced bioremediation to address groundwater contamination may be viable through the addition of oxygen and nutrients (i.e., nitrate). Pilot testing of potential remediation technologies suggests that SVE, air sparging, and DPE would be feasible for implementation at the Site. The implementation of an SVE system was identified as being able to immediately address the potential vapor intrusion risks and also mitigate residual source-area contamination in the vadose zone and SPH. The inclusion of either air sparging or DPE would also accelerate the cleanup of impacted groundwater and DPE would improve the removal of SPH.

• Based on the results of the pilot testing, a full-scale SVE system was designed to remove petroleum mass from the vadose zone and phreatic surface across the area impacted by SPH at and downgradient of the Site – documented in the Corrective Action Plan (CAP) for the Site (Apex, 2015). The SVE wells were installed in November 2015 and the system construction was completed in June 2016.

2.3 Other Impacted Sites

The Site is located in relatively near proximity to three other sites known to have been impacted by petroleum hydrocarbons, summarized below.

Carson Oil CFN Card Lock. The Carson property is located immediately north of the Site (105 North 4th Street). The property was reportedly developed as a gasoline service station in the 1960s and has continued in this use through the present (under various ownerships and configurations). Between 1999 and 2008, several Site investigations were completed at the property, including around the associated USTs. Two monitoring wells were installed on the property (MW-1 and MW-2) in 2008 and were sampled between 2008 and 2011. It was concluded from the Site investigation data that there was insufficient evidence of a significant release of petroleum hydrocarbons on the Carson property and that impacts to the property were likely originating from upgradient (i.e., to the south or southeast). A No Further Action (NFA) determination was made for the property by the DEQ in October 2013.

Opportunity Foundation/McDonald Auto Sales. The Opportunity Foundation property is located to the east of the Site (across 4th Street). The property was developed as an automobile sales and service facility in the late 1910s. Several gasoline service stations were historically present on the property, and it was reported that the associated tanks and other infrastructure were removed (several tanks were decommissioned by removal in 1991). The property is currently vacant and the buildings associated with the most recent use as

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an auto dealership (McDonald Auto) were removed in 2002. The current owner (the Opportunity Foundation) entered into a Prospective Purchaser Agreement (PPA) with the DEQ in 2001. Two groundwater monitoring wells currently exist on the property (MW-6 and MW-9), installed as part of the investigation of the Leathers Oil property discussed below (a third well, MW-10, was abandoned in 2003 after being damaged during construction activities on the property). Several other investigations have been completed at the property and a soil removal was completed in 2003 as part of a heating oil tank decommissioning. It has been concluded that there are significant concentrations of petroleum hydrocarbons beneath the property (at or near the depth to groundwater), and the likely source has been identified as the Leathers Oil property to the east (discussed below). Leathers Oil has apparently taken responsibility for the impacts beneath the property.

Leathers Oil Property. The Leathers Oil property is located at 158 NE 5th Street. The property has been reportedly owned by Leathers Oil since 1975 and has been involved in the retail distribution of gasoline since that time. A release from the UST system at the property was identified in 1991 and multiple Site investigations were completed to characterize the extent and magnitude of the release – including the installation of 13 groundwater monitoring wells between 1994 and 1997 (MW-1 through MW-13, located both on and off of the property, including wells on the Opportunity Foundation property as discussed above). A remediation system (including groundwater air sparging and SVE) was installed in 1994 – operating from 1994 to 1996 and again from 2000 to 2004. Other remediation activities included the removal of 806 tons of petroleum-impacted soil and the removal of SPH via sorbent materials in monitoring wells. A reported total of 5,793 gallons of SPH was removed from the Site during active treatment activities.

Groundwater monitoring associated with the Leathers Oil property has concluded that SPH and dissolved-phase hydrocarbons impacted the property and the adjacent Opportunity Foundation property, with a plume that extended approximately 500 feet to the northwest (to the area of the intersection of 4th Street and “A” Street – perhaps crossing the northeast corner of the Carson Oil property). While it is acknowledged that petroleum contamination remains at the property, the investigation and remediation activities that have been conducted were determined by DEQ to meet the requirements for the Generic Remedy for Simple Risk- Based Cleanups and a conditional NFA determination was made for the property on March 18, 2013.

2.4 Geology and Hydrogeology

The following is a discussion of the topography, geology, and hydrogeology of the Site and vicinity.

Topography. The Site and the immediate vicinity are relatively flat with a gentle slope to the northwest, toward an intermittent drainage (Willow Creek) located about 650 feet north of the Site (an elevation drop of about 8 feet). The ground surface elevation at the Site is about 2,238 feet above MSL.

Regional Geology. The regional geology in the vicinity of the Site has been mapped as the upper Miocene and lower Pliocene Deschutes Formation, which is comprised of volcanic deposits and sedimentary beds resulting from episodic volcanic eruptions. The formation generally consists of coarse-grained volcanic

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sandstones, conglomerates, and debris flow breccias interbedded with silicic ignimbrites, air-fall lapillistones, and basalt (Smith, 1987). The United States Department of Agriculture (USDA) soil survey of the Upper Deschutes River Area maps the vicinity of the Site with a deep and well-drained sandy loam and a cobbly substratum.

Local geology as encountered in explorations completed at the Site has included interbedded silts, clays, sands, and gravels.

Regional Hydrogeology. United States Geological Survey (USGS) studies show the regional water table in the vicinity of the City of Madras at a depth of more than 200 feet bgs. A review of Oregon Water Resources Department (OWRD) water well logs show City water wells intercept productive aquifers at depths of between 360 and 470 feet bgs.

Site-Specific Geology. Explorations at the Site and the immediate vicinity generally encountered silty sands and sandy silts through the full depth of each excavation (to depths of up to 47 feet bgs), with occasional gravels and interbedded gravelly layers. Previous explorations in the area have identified hard and expansive materials in borings at depths of between 27 to 35 feet bgs.

Site-Specific Hydrogeology. Historically, shallow groundwater was encountered at the Site at depths of between 16 and 20 feet bgs in 1999 (into which monitoring wells MW-1 through MW-4 were installed). From 2000 to 2010, water levels decreased to an average of about 37 feet bgs (resulting in the installation of Site monitoring wells MW-5 through MW-10) and rose again in 2011. Historical observations of gradient direction at the Site have been inconsistent and historically collected data are not considered reliable. Groundwater gradients observed at other sites in the area suggested a consistent groundwater gradient of about 0.02 feet per feet (ft/ft) to the northwest. Groundwater encountered during recent groundwater monitoring events has been observed at depths ranging from 23.0 feet bgs in MW-11 (May 2017) to 47.1 feet bgs in MW-17R (March 2015). Groundwater elevations have ranged from 2189.1 feet in MW017R (March 2016) to 2215.6 feet in MW-3 (November 2016), with a consistent northwesterly gradient that ranges from 0.03 ft/ft to 0.08 ft/ft. Shallower groundwater is consistently found to the east and south side of the Site and generally has a relatively steeper gradient northwest of the Site. The groundwater elevations encountered at the Site have generally been increasing since 2014 (the average groundwater elevation in May 2017 was about 4 feet higher than in May 2014).

3.0 Pre-Investigation Activities

Site Health and Safety Plan. A Site-specific health and safety plan (HASP) was prepared for the field activities and was included in Appendix B of the Site Investigation Work Plan (Apex, 2014b). The HASP was prepared in general accordance with the Occupational Safety and Health Administration (OSHA) and the Oregon Administrative Rules (OAR). A copy of the HASP was maintained on-site during the field activities.

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Property Access. DEQ obtained access agreements with the owners of the properties involved in the site investigation activities, including the Site owner and the adjacent mobile home park west of the Site (Willow Creek). Apex notified the Site tenant (Truce Auto) of the Site investigation activities.

Subcontractor Solicitation. Analytical laboratory services were provided by ESC Lab Sciences (ESC) under their price agreement with the State of Oregon.

4.0 Field Activities and Findings

Work was conducted in general accordance with the Supplemental Site Investigation Work Plan (Apex, 2014c) and the Sampling and Analysis Plan included in the Site Investigation Work Plan (Apex, 2014b). Field activities included monitoring well gauging, collection and analysis of groundwater samples, purging accumulated SPH from site wells, system operations and maintenance, and soil vapor sampling.

4.1 Groundwater Monitoring

Groundwater Levels. Groundwater levels were measured on May 17, 2017 from the Site monitoring wells (MW-1 through MW-18). The wells were opened and the water level was allowed to equilibrate before the measurements were taken. The depth to groundwater and SPH was measured in each well to the nearest 0.01 foot using an electronic water level probe. The measured depths to groundwater and groundwater elevations are included in Table 1. Groundwater elevations are presented on Figure 3. Five of the monitoring wells were dry (MW-1 through MW-4 and MW-10), and SPH was encountered in seven of the monitoring wells (MW-5 through MW-9, MW-13, and MW-14), with measured SPH thicknesses ranging from 0.01 foot (in wells MW-8 and MW-14) to 2.06 feet in MW-6, and an average thickness of 0.56 feet in these wells (compared to an observed average of 1.22 feet in the prior event). Approximately 1 gallon of SPH was purged from three wells (MW-5, MW-6, and MW-7) during this event, for a total SPH removal of 22 gallons since the quarterly purging program began in 2014.

In general, the groundwater elevation data suggest a northwesterly horizontal groundwater flow direction, with an average gradient of 0.045 ft/ft (flatter than was observed during the prior event, but within the range of historically observed conditions). On average, the groundwater elevation during the May 2017 event was slightly higher that observed during the prior event in February 2017 (0.33 foot higher), and was about 2.8 feet higher than was observed in the May 2016 event. On average, the groundwater elevations have been rising on the order of 1.3 feet per year since 2014.

The implementation of the Corrective Action SVE system (discussed below) has apparently reduced the extent and thickness of SPH at the Site. Wells within the area of influence (MW-1 through MW-10, MW-13, and

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MW-14) have shown a 70 percent reduction in SPH thickness on average since 2014, and wells MW-8, MW-9, MW-13, and MW-14 have SPH thicknesses that were 0.02 feet or less in May 2017.

Groundwater Sampling. Groundwater samples were collected on May 17 and 18, 2017. Groundwater samples were not collected from wells that were dry (MW-1 through MW-4 and MW-10), or were impacted by SPH (wells MW-5 through MW-9, MW-13, and MW-14). The samples were collected with disposable bailers. Field parameters collected during sampling included temperature, pH, conductivity, dissolved oxygen concentration, and oxidation-reduction potential. Field parameters are summarized in Table 1 and analytical data are in Table 2.

4.2 Soil Vapor Monitoring

In September 2014, during the supplemental site investigation (SSI), four soil vapor monitoring points were installed in across the Site (VP-1 through VP-4). Vapor points VP-1 and VP-2 were installed to assess possible residential exposure concentrations of soil vapor into indoor air within the mobile home park, while VP-3 and VP-4 assessed the occupational exposure risk. During the May 2017 event monitoring points VP-1 (on the west side of the mobile home park) and VP-3 (on the north side of the Site building) could not be located. Monitoring point VP-1 is believed to have been damaged and no longer in place. VP-3 is located in a parking and storage area and could not found during the field event. Vapor points VP-2 and VP-4 were sampled using laboratory supplied summa canisters with 30-minute flow controllers.

4.3 SVE System Operation

The SVE system equipment installation was complete and the system was initially started up on June 15, 2016. Full-time operation (following initial debugging of the system) began on August 29, 2016. Since that time, the system has operated essentially consistently (with only periodic shutdowns for system maintenance). In-depth discussion of the SV installation, operation, maintenance, and objectives is in the Corrective Action Implementation Report, dated November 1, 2016.

System Performance Monitoring. Vacuum pressures generated by the SVE system are routinely measured to assess the consistency and adequacy of the SVE equipment operation. Periodically, each monitoring point (including the five SVE system extraction wells and monitoring wells within the influence zone of the system) is connected to a Magnahelic pressure gauge (via a slip cap outfitted with a sample port) and vacuum pressures are measured to allow tracking of changes over time. The vacuum pressures and flow rates at the blower are also tracked during routine maintenance events to assess potential changes in system operation. A summary of the measured system pressures is included in Table 3.

The system operation develops a vacuum field in the treatment area that is larger than the design minimum extent (based on the magnitude of the vacuum pressures observed in the monitoring points). The system has operated nearly consistently since the initial startup and debugging in August 2016, and has run for more than

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6,298 total operating hours as of the May sampling event (an up-time of nearly 100 percent since full-time startup). The vapor treatment system has consistently reduced effluent concentrations to below stack discharge limits (with a designed VOC destruction rate of more than 98 percent).

The pre-treatment vapor concentrations were applied to the measured flow rates at the system (an average of about 370 cubic feet per minute [cfm]) to assess the total mass of vapors that have been removed by the SVE system (summarized in Tables 3 and 4). Since the system began normal operation, a total of about 3,400 pounds of VOCs has been removed (the mass equivalent of about 535 gallons of gasoline, for a total removal of about 557 gallons including the SPH purging effort).

The rate of mass removal has dropped significantly over the last several monitoring periods (from approximately 27 pounds per month in November 2016 to 1.1 pounds per month in May 2017). This reduction is likely attributed to two factors: first, less SPH mass is available for removal due to the operation of the SVE system; and the rising groundwater table will likely have trapped some fraction of the SPH below the phreatic surface (making it unavailable to the SVE system until water levels decrease). Given the relatively low rate of current mass removal, we recommend the evaluation of periodic cycling of the system (such as on a monthly on and off cycle).

5.0 Chemical Analyses and Results

The collected groundwater, SVE system vapor, and vapor monitoring point samples were submitted to ESC in Mount Juliet, Tennessee for analysis on a standard turnaround time. Copies of the analytical laboratory reports are included in Appendix A, along with a quality assurance/quality control (QA/QC) review of the data. The results of the data quality review indicate that the data are of acceptable quality and are suitable for their intended purpose.

5.1 Analyses Performed

Groundwater samples were analyzed for TPHg by Northwest Method NWTPH-Gx and VOCs by U.S. Environmental Protection Agency (EPA) Method 8260B. The SVE system vapor sample and soil vapor samples were analyzed for VOCs by EPA Method TO-15.

5.2 Chemical Results and Observations

Groundwater Samples. Groundwater results are presented in Table 2 and summarized on Figure 4. Petroleum hydrocarbons were detected in two of the six collected groundwater samples (wells MW-11 and MW-18), though the seven wells with measured SPH are assumed to be impacted by relatively higher concentrations. In general, the relatively highest concentrations of petroleum hydrocarbons detected during this event were encountered in monitoring well MW-11. TPHg was detected in one well (MW-11) at an

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estimated concentration of 82.5 µg/L. Benzene and methyl tertiary-butyl ether (MTBE) were detected in one well (MW-18) at concentrations of 0.859 and 7.60 µg/L, respectively.

In general, the petroleum concentrations detected in the groundwater during the May 2017 monitoring event are consistent with historical data. VOC concentrations in MW-11 were consistent with the previous event (February 2017) and significantly lower than were encountered in November 2016. The concentrations of petroleum hydrocarbons observed in monitoring well MW-18 (the well most north of the Site) have been fluctuating significantly since monitoring began in this well, with TPH concentrations ranging from non-detect to 138 µg/L (and non-detect during this event). In general, the concentrations in MW-18 observed during this monitoring event are lower than have been observed during the two prior monitoring events, and the concentrations observed in MW-11 are similar to the prior event (significantly reduced from historical highs).

SVE System Sampling. During the May 2017 site visit, a vapor sample was collected from the pre-treated SVE discharge and submitted to the analytical laboratory (ESC Lab Sciences). The vapor analytical results are presented in Table 4, and the laboratory analytical reports are provided in Appendix A. The analytical results showed a concentration of 85 micrograms per cubic meter (µg/m3) of benzene, 431 µg/m3 of cyclohexane, 52 µg/m3 ethylbenzene, 307 µg/m3 of heptane, 1,430 µg/m3 of n-hexane, 500 µg/m3 toluene, 1,290 µg/m3 of 2,2,4-trimethylpentane, 544 µg/m3 total xylenes, 20,000 µg/m3 of total petroleum hydrocarbons (TPH), and a total sum of VOC concentrations of 4,639 µg/m3. These results are significantly lower than was observed in the February 2017 system sample (by about 67 percent), likely due to a combination of seasonal groundwater table fluctuations (as the groundwater elevations are currently relatively high) and the removal of petroleum mass by the corrective action SVE system.

Sampling of the treated air stream is not feasible as it exhausts out of the top of the equipment stack at a temperature that generally exceeds 1,600 degrees Fahrenheit. The system is rated to destroy a minimum of 98 percent of the contaminant mass, and the calculated exposure point concentration limits are shown in Table 4 (and discussed in Section 6.2, below). Further monitoring will be used to track the effectiveness of the system.

Soil Vapor Sampling. During the May 2017 event, soil vapor samples were collected from the available vapor monitoring points. Samples collected from VP-2 and VP-4 were submitted to the analytical laboratory (ESC Lab Sciences). The soil vapor analytical results are presented in Table 5, and the laboratory analytical reports are provided in Appendix A. The analytical results showed concentrations of 246 µg/m3 to 297 µg/m3 of TPHg, 0.679 µg/m3 to 0.882 µg/m3 of benzene, 12.2 µg/m3 to 13.4 µg/m3 of total BTEX, and no detections for MTBE or naphthalene. These results are significantly lower than the historical high concentrations measured in December 2014. Concentrations of TPHg have decreased by approximately 60 percent, benzene by about 95 percent, and total BTEX by almost 90 percent. As the SVE system directly influences the vadose zone, it is likely that these reductions are associated with the operation of the corrective action SVE system.

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6.0 Risk-Based Screening

The following is a risk screening of the chemical data collected during the May 2017 groundwater monitoring event. In general, data from on-site explorations (MW-1 through MW-11) were screened against occupational RBCs and off-site explorations (MW-12 through MW-18) were screened against residential RBCs (reflecting the difference in current and reasonably likely future land uses in the vicinity of each monitoring point).

6.1 Analytical Data and Risk-Based Screening: Groundwater

Groundwater concentrations were compared to applicable DEQ RBCs (Table 2). Based on the conceptual site model, the potentially applicable RBCs include:

• Residential and occupational vapor intrusion (RBCwi); and • Residential and occupational volatilization to outdoor air (RBCwo).

Total Petroleum Hydrocarbons. The detected concentrations of TPHg are below the applicable RBCs. Seven wells were not sampled due to the presence of SPH and are therefore impacted by TPH at levels that are presumed to exceed RBCs.

Volatile Organic Compounds. The detected concentrations of VOCs were below their applicable RBCs. Seven monitoring wells were not sampled due to the presence of SPH and are therefore presumed to be impacted by VOCs at concentrations that exceed RBCs.

6.2 Analytical Data and Risk-Based Screening: Soil Vapor

Soil vapor concentrations were compared to applicable DEQ RBCs (Table 5). Based on the conceptual site model, the potentially applicable RBCs are residential soil gas (VP-1 and VP-2) and occupational soil gas (VP-3 and VP-4).

Total Petroleum Hydrocarbons. The detected concentrations of TPHg are below the applicable RBCs.

Volatile Organic Compounds. The detected concentrations of VOCs were below their applicable RBCs.

6.3 Air Discharge Risk-Based Screening and Compliance

In accordance with DEQ guidance (Guidance for Managing Hazardous Substance Air Discharges from Remedial Systems; DEQ, 2006), the EPA SCREEN3 vapor distribution model was used to calculate the discharge stack concentrations that would equate to an exposure-point concentration that was equal to the RBC limits for each analyte. These calculations are included in the Corrective Action Implementation Report (Apex, 2016). These analytical limits (Calculated Discharge Limits) are included in Table 4. The discharge

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concentrations for each of the VOCs are at least four orders of magnitude below the respective discharge limits.

7.0 Conclusions and Recommendations

The conclusions that can be drawn from the May 2017 groundwater and soil vapor monitoring event include the following:

• Petroleum hydrocarbons were not detected in the three westernmost perimeter wells (MW-15, MW-16, and MW-17R). The northernmost perimeter well (MW-18) is showing dissolved-phase petroleum hydrocarbon concentrations that appear to have a seasonal fluctuation that is generally decreasing – indicating that the petroleum plume is stable or decreasing in size.

• The extent and thickness of SPH observed during the May 2017 monitoring event is significantly less than prior to the Corrective Action implementation. The observed reductions are most significant around the perimeter of the SPH pool (wells MW-8, MW-9, MW-13, and MW-14 all have SPH thicknesses of 0.02 foot or less), though larger reductions have been observed in on-site wells (particularly MW-5 and MW-7).

• No analytes were detected in groundwater samples collected during this monitoring event that exceed their respective RBCs. However, it is presumed that wells impacted by SPH (MW-5 through MW-9, MW-13, and MW-14) are impacted by petroleum hydrocarbon concentrations above RBCs.

• No analytes were detected in the soil vapor samples collected during this monitoring event that exceed their respective RBCs.

• Since the prior reporting period, the SVE system has operated continuously and has removed an estimated 151 pounds of petroleum hydrocarbons (for an overall total of about 3,400 pounds or the mass equivalent of about 535 gallons of gasoline). Discharge vapor concentrations have consistently been several orders of magnitude below calculated RBC-based limits for exposure- point concentrations.

• The rate of petroleum mass removal has dropped over the last several monitoring rounds (by an order of magnitude since November 2016) likely as a result of both the mass removal to date and the rising water table.

7.1 Recommendations for Additional Work

Due to the reduction in the mass removal rate, we recommend evaluating whether it would be more efficient to operate the SVE system on a periodic cycle (such as turning the system on and off on a monthly program) to reduce operating costs while allowing the remaining SPH mass to volatilize (which occurs at a rate that is less than the SVE removal). This reduced operation cycle may be most applicable during periods of rising

Second Quarter 2017 Site Investigation Data Report Page 12 Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4

groundwater elevations, while full-time operation may be warranted during falling groundwater elevations (as additional petroleum mass would be exposed under these conditions).

SVE system monitoring during operation (via a combination of laboratory samples and PID measurements) will be used to assess system operation, assess compliance with discharge requirements, and track mass removal. Groundwater monitoring is recommended to further assess the potential for seasonal variability in concentrations and reductions due to system operation. Routine monitoring will also include measurements of SPH thicknesses in selected monitoring wells and manual removal (i.e., bailing) of SPH in wells with more than 0.1 foot SPH thickness.

8.0 References

Apex Companies, LLC (Apex), 2014a. Site Investigation Data Report, Former Ivy’s Jiffy Market, Madras, Oregon. June 17, 2014.

Apex, 2014b. Site Investigation Work Plan, Former Ivy’s Jiffy Market, Madras, Oregon. January 6, 2014.

Apex, 2014c. Supplemental Site Investigation Work Plan, Former Ivy’s Jiffy Market, Madras, Oregon. June 17, 2014.

Apex, 2015. Corrective Action Plan, Former Ivy’s Jiffy Market, Madras, Oregon. April 9, 2015.

Apex, 2016. Corrective Action Implementation Report, Former Ivy’s Jiffy Market, Madras, Oregon. November 1, 2016

Oregon Department of Environmental Quality (DEQ), 2010. Quality Assurance Project Plan, Underground Storage Tanks (UST) Program. September 2010.

Osprey, 2009. Environmental Site Investigation. Former Ivy’s Jiffy Market, 40 NW 4th Street, Madras, Oregon. Prepared for James and Darlene Ivy. Prepared by Osprey Environmental, LLC. March 18, 2009

Smith, 1987. Geologic Map of the Madras West and Madras East Quadrangles, Jefferson County, Oregon. GMS-45, 1987.

Second Quarter 2017 Site Investigation Data Report Page 13 Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 Table 1 Groundwater Elevations and Field Parameters Former Ivy's Jiffy Market, Madras, Oregon

Groundwat Field Parameters Casing Depth to SPH Depth to er Temperatu Conductiv Well ID Elevation Sample Date Water Thickness DO ORP SPH (feet) Elevation pH re ity (feet) (feet) (feet) (ppm) (mV) (feet)* (°C) (µS) 5/14/2014 DRY NA NA NA NA NA NA NA NA 9/27/2014 DRY NA NA NA NA NA NA NA NA 12/16/2014 DRY NA NA NA NA NA NA NA NA 3/31/2015 DRY NA NA NA NA NA NA NA NA 6/3/2015 DRY NA NA NA NA NA NA NA NA 9/23/2015 DRY NA NA NA NA NA NA NA NA MW-1 2238.59 2/10/2016 DRY NA NA NA NA NA NA NA NA 5/18/2016 DRY NA NA NA NA NA NA NA NA 8/30/2016 DRY NA NA NA NA NA NA NA NA 11/14/2016 DRY NA NA NA NA NA NA NA NA 2/15/2017 DRY NA NA NA NA NA NA NA NA 5/18/2017 DRY NA NA NA NA NA NA NA NA 5/14/2014 DRY NA NA NA NA NA NA NA NA 9/27/2014 DRY NA NA NA NA NA NA NA NA 12/16/2014 DRY NA NA NA NA NA NA NA NA 3/31/2015 DRY NA NA NA NA NA NA NA NA 6/3/2015 DRY NA NA NA NA NA NA NA NA 9/23/2015 DRY NA NA NA NA NA NA NA NA MW-2 2238.60 2/10/2016 DRY NA NA NA NA NA NA NA NA 5/18/2016 DRY NA NA NA NA NA NA NA NA 8/30/2016 DRY NA NA NA NA NA NA NA NA 11/14/2016 DRY NA NA NA NA NA NA NA NA 2/15/2017 DRY NA NA NA NA NA NA NA NA 5/18/2017 DRY NA NA NA NA NA NA NA NA 5/14/2014 DRY NA NA NA NA NA NA NA NA 9/27/2014 DRY NA NA NA NA NA NA NA NA 12/16/2014 DRY NA NA NA NA NA NA NA NA 3/31/2015 DRY NA NA NA NA NA NA NA NA 6/3/2015 DRY NA NA NA NA NA NA NA NA 9/23/2015 DRY NA NA NA NA NA NA NA NA MW-3 2238.61 2/10/2016 DRY NA NA NA NA NA NA NA NA 5/18/2016 DRY NA NA NA NA NA NA NA NA 8/30/2016 DRY NA NA NA NA NA NA NA NA 11/14/2016 23.01 -- -- 2215.60 8.04 14.34 4140 2.71 43.8 2/15/2017 DRY NA NA NA NA NA NA NA NA 5/18/2017 DRY NA NA NA NA NA NA NA NA 5/14/2014 DRY NA NA NA NA NA NA NA NA 9/27/2014 DRY NA NA NA NA NA NA NA NA 12/16/2014 DRY NA NA NA NA NA NA NA NA 3/31/2015 DRY NA NA NA NA NA NA NA NA 6/3/2015 DRY NA NA NA NA NA NA NA NA 9/23/2015 DRY NA NA NA NA NA NA NA NA MW-4 2238.34 2/10/2016 DRY NA NA NA NA NA NA NA NA 5/18/2016 DRY NA NA NA NA NA NA NA NA 8/30/2016 DRY NA NA NA NA NA NA NA NA 11/14/2016 DRY NA NA NA NA NA NA NA NA 2/15/2017 DRY NA NA NA NA NA NA NA NA 5/18/2017 DRY NA NA NA NA NA NA NA NA Please see notes at end of table.

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 1 of 5 Table 1 Groundwater Elevations and Field Parameters Former Ivy's Jiffy Market, Madras, Oregon

Groundwat Field Parameters Casing Depth to SPH Depth to er Temperatu Conductiv Well ID Elevation Sample Date Water Thickness DO ORP SPH (feet) Elevation pH re ity (feet) (feet) (feet) (ppm) (mV) (feet)* (°C) (µS) 5/14/2014 34.9 32.4 2.5 2205.50 No Sample Collected: Removed 1L SPH 9/27/2014 29.5 25.4 4.1 2212.15 No Sample Collected: Removed 1.8L SPH 12/16/2014 31.83 29.42 2.41 2208.50 No Sample Collected: Removed 0.5 Gal. SPH 3/31/2015 33.40 28.40 5.00 2208.95 No Sample Collected: Removed 0.5 Gal. SPH 6/3/2015 30.62 30.60 0.02 2207.85 No Sample Collected 9/23/2015 30.40 29.42 0.98 2208.81 No Sample Collected: Removed 0.2L SPH MW-5 2238.45 2/10/2016 31.76 30.47 1.29 2207.70 No Sample Collected: Removed 0.2L SPH 5/18/2016 32.46 31.00 1.46 2207.13 No Sample Collected: Removed 0.5L SPH 8/30/2016 28.90 28.00 0.90 2210.25 No Sample Collected: Removed 1.2 Gal. SPH 11/14/2016 29.53 28.42 1.11 2209.79 No Sample Collected 2/15/2017 29.31 27.99 1.32 2210.17 No Sample Collected: Removed 0.5 Gal. SPH 5/18/2017 28.74 27.85 0.89 2210.40 No Sample Collected: Removed 0.25 Gal. SPH 5/14/2014 37.2 32.0 5.2 2205.60 No Sample Collected: Removed 0.8L SPH 9/27/2014 29.2 28.2 1.0 2210.32 No Sample Collected: Removed 0.3L SPH 12/16/2014 30.70 28.00 2.70 2210.15 No Sample Collected: Removed 0.5 Gal. SPH 3/31/2015 32.40 30.00 2.40 2208.21 No Sample Collected: Removed 0.5 Gal. SPH 6/3/2015 32.41 29.21 3.20 2208.83 No Sample Collected 9/23/2015 27.21 27.20 0.01 2211.54 No Sample Collected MW-6 2238.74 2/10/2016 30.43 28.70 1.73 2209.66 No Sample Collected: Removed 2.0L SPH 5/18/2016 31.02 30.88 0.14 2207.83 No Sample Collected: Removed 0.5L SPH 8/30/2016 27.60 27.00 0.60 2211.61 No Sample Collected: Removed 0.2 Gal SPH 11/14/2016 28.78 26.35 2.43 2211.86 No Sample Collected 2/15/2017 28.44 26.29 2.15 2211.98 No Sample Collected: Removed 0.75 Gal SPH 5/18/2017 27.98 25.92 2.06 2212.37 No Sample Collected: Removed 0.25 Gal SPH 5/14/2014 32.2 29.9 2.3 2207.86 No Sample Collected: Removed 0.1L SPH 9/27/2014 29.5 27.6 1.9 2210.25 No Sample Collected: Removed 0.5L SPH 12/16/2014 28.65 26.90 1.75 2210.99 No Sample Collected: Removed 0.25 Gal. SPH 3/31/2015 30.00 28.42 1.58 2209.50 No Sample Collected: Removed 0.5 Gal. SPH 6/3/2015 28.69 28.32 0.37 2209.87 No Sample Collected 9/23/2015 28.17 28.15 0.02 2210.12 No Sample Collected MW-7 2238.27 2/10/2016 27.30 27.27 0.03 2210.99 No Sample Collected: Removed 0.3 L SPH 5/18/2016 28.14 28.10 0.04 2210.16 No Sample Collected: Removed 1.0 L SPH 8/30/2016 28.40 27.80 0.60 2210.34 No Sample Collected: Removed 0.2 Gal SPH 11/14/2016 29.80 24.68 5.12 2212.46 No Sample Collected 2/15/2017 29.45 24.46 4.99 2212.71 No Sample Collected: Removed 1.5 Gal SPH 5/18/2017 25.84 24.90 0.94 2213.16 No Sample Collected: Removed 0.5 Gal SPH 5/14/2014 30.7 30.0 0.7 2208.06 No Sample Collected: Removed 0.1L SPH 9/27/2014 28.8 26.6 2.2 2211.13 No Sample Collected: Removed 0.5L SPH 12/16/2014 27.10 26.80 0.30 2211.34 No Sample Collected: Removed 0.25 Gal. SPH 3/31/2015 29.70 28.60 1.10 2209.37 No Sample Collected: Removed 0.5 Gal SPH 6/3/2015 28.64 28.61 0.03 2209.59 No Sample Collected 9/23/2015 28.05 28.00 0.05 2210.20 No Sample Collected: Removed 0.1L SPH MW-8 2238.21 2/10/2016 28.18 28.13 0.05 2210.07 No Sample Collected: Removed 0.3L SPH 5/18/2016 29.00 28.86 0.14 2209.32 No Sample Collected: Removed 0.6L SPH 8/30/2016 28.30 27.95 0.35 2210.18 No Sample Collected: Removed 0.5 Gal SPH 11/14/2016 25.92 25.70 0.22 2212.46 No Sample Collected 2/15/2017 25.44 25.40 0.04 2212.80 No Sample Collected 5/18/2017 24.81 24.80 0.01 2213.41 No Sample Collected Please see notes at end of table.

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 2 of 5 Table 1 Groundwater Elevations and Field Parameters Former Ivy's Jiffy Market, Madras, Oregon

Groundwat Field Parameters Casing Depth to SPH Depth to er Temperatu Conductiv Well ID Elevation Sample Date Water Thickness DO ORP SPH (feet) Elevation pH re ity (feet) (feet) (feet) (ppm) (mV) (feet)* (°C) (µS) 5/14/2014 29.60 -- -- 2208.58 7.22 18.26 687 NA NA 9/27/2014 28.00 27.98 0.02 2210.20 No Sample Collected 12/16/2014 26.50 -- -- 2211.68 6.25 12.47 800 6.75 -12.1 3/31/2015 28.40 -- Sheen 2209.78 No Sample Collected 6/3/2015 28.02 28.01 0.01 2210.17 No Sample Collected 9/23/2015 27.91 27.90 0.01 2210.28 No Sample Collected MW-9 2238.18 2/10/2016 27.70 27.68 0.02 2210.50 No Sample Collected; Purged 0.3L SPH 5/18/2016 28.25 28.18 0.07 2209.98 No Sample Collected; Purged 0.7L SPH 8/30/2016 28.90 27.85 1.05 2210.10 No Sample Collected; Purged 1.5 Gal. SPH 11/14/2016 25.21 25.15 0.06 2213.02 No Sample Collected 2/15/2017 24.86 24.83 0.03 2213.34 No Sample Collected 5/18/2017 24.30 24.28 0.02 2213.90 No Sample Collected 5/14/2014 29.58 29.54 0.04 2208.94 No Sample Collected: Removed <0.1L SPH 9/27/2014 28.10 -- Sheen 2210.39 No Sample Collected 12/16/2014 26.21 -- Sheen 2212.28 No Sample Collected 3/31/2015 28.18 -- Sheen 2210.31 No Sample Collected 6/3/2015 27.90 27.89 0.01 2210.60 No Sample Collected 9/23/2015 26.55 26.54 0.01 2211.95 No Sample Collected MW-10 2238.49 2/10/2016 27.52 27.51 0.01 2210.98 No Sample Collected 5/18/2016 DRY -- -- NA No Sample Collected 8/30/2016 DRY -- -- NA No Sample Collected 11/14/2016 23.52 -- -- 2214.97 No Sample Collected 2/15/2017 24.30 -- -- 2214.19 6.71 13.27 909 3.18 100.3 5/18/2017 DRY -- -- NA No Sample Collected 5/14/2014 29.56 29.55 0.01 2209.00 7.82 18.99 668 7.7 592 9/27/2014 27.60 -- -- 2210.95 7.78 18.0 665 6.94 59.2 12/16/2014 25.56 -- -- 2212.99 6.25 12.6 827 1.91 -0.1 3/31/2015 27.40 -- -- 2211.15 6.59 9.3 323 8.26 -256 6/3/2015 27.20 -- Sheen 2211.35 No Sample Collected 9/23/2015 25.89 25.60 0.29 2212.89 No Sample Collected: Removed 0.75L SPH MW-11 2238.55 2/10/2016 26.96 -- -- 2211.59 7.61 14.2 845 1.80 -68.7 5/18/2016 28.20 -- -- 2210.35 7.21 13.9 881 2.01 -70.1 8/30/2016 25.50 -- -- 2213.05 7.13 12.2 673 2.85 -80.3 11/14/2016 23.59 -- -- 2214.96 3.64 15.06 5901 3.62 47.7 2/15/2017 23.33 -- -- 2215.22 6.39 14.56 822 2.44 79.4 5/18/2017 23.03 -- -- 2215.52 7.66 16.7 826 1.98 90.9 5/14/2014 33.55 33.54 0.01 2204.91 7.16 15.1 720 4.2 96.4 9/27/2014 30.30 -- -- 2208.15 7.05 15.05 699 3.4 199.4 12/16/2014 29.54 -- -- 2208.91 5.94 12.6 760 1.9 -0.4 3/31/2015 30.15 -- -- 2208.30 7.1 13.01 705 2.5 200.3 6/3/2015 30.14 -- -- 2208.31 7.47 14.4 949 3.1 433 9/23/2015 28.45 28.40 0.05 2210.04 No Sample Collected: Removed 0.25L SPH MW-12 2238.45 2/10/2016 30.67 -- -- 2207.78 7.79 13.4 753 4.64 -48.2 5/18/2016 31.40 -- -- 2207.05 7.41 11.45 655 5.62 -50.1 8/30/2016 27.55 -- -- 2210.90 7.05 9.35 458 4.23 -54.2 11/14/2016 28.00 -- -- 2210.45 7.78 13.9 3057 4.7 63.9 2/16/2017 27.80 -- -- 2210.65 7.29 14.08 620 3.7 55.3 5/18/2017 27.54 -- -- 2210.91 7.31 15.4 475 3.87 115.9 Please see notes at end of table.

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 3 of 5 Table 1 Groundwater Elevations and Field Parameters Former Ivy's Jiffy Market, Madras, Oregon

Groundwat Field Parameters Casing Depth to SPH Depth to er Temperatu Conductiv Well ID Elevation Sample Date Water Thickness DO ORP SPH (feet) Elevation pH re ity (feet) (feet) (feet) (ppm) (mV) (feet)* (°C) (µS) 5/14/2014 35.48 35.47 0.01 2202.90 7.18 23 1224 2.3 76.2 9/27/2014 33.70 -- -- 2204.67 7.21 21.4 1354 1.93 76.4 12/16/2014 33.83 -- -- 2204.54 5.85 12.63 1001 1.89 -0.2 3/31/2015 35.65 -- -- 2202.72 5.98 10.4 86.5 3.62 -348 6/3/2015 34.13 -- -- 2204.24 7.51 14.7 1066 3.12 322.1 9/23/2015 32.40 -- -- 2205.97 7.58 15.36 1140 3.00 421.5 MW-13 2238.37 2/10/2016 34.08 -- -- 2204.29 7.54 14.3 774 1.21 -86.1 5/18/2016 34.12 -- -- 2204.25 7.21 14.11 768 0.99 -60.2 8/30/2016 28.20 27.90 0.3 2210.40 No Sample Collected: Removed 0.5 G SPH 11/14/2016 33.42 33.40 0.02 2204.97 No Sample Collected 2/15/2017 33.52 33.50 0.02 2204.87 No Sample Collected 5/18/2017 33.87 33.85 0.02 2204.52 No Sample Collected 5/14/2014 39.30 38.80 0.50 2198.92 No Sample Collected: Removed <0.1L SPH 9/27/2014 36.81 36.71 0.10 2201.10 No Sample Collected: Removed <0.1L SPH 12/16/2014 46.01 34.64 11.37 2200.69 No Sample Collected: Removed 4 Gal. SPH 3/31/2015 40.20 37.54 2.66 2199.70 No Sample Collected: Removed 2 Gal. SPH 6/3/2015 37.52 35.83 1.69 2201.63 No Sample Collected 9/23/2015 34.35 34.15 0.20 2203.64 No Sample Collected: Removed 1L SPH MW-14 2237.83 2/10/2016 35.72 35.22 0.50 2202.50 No Sample Collected: Removed 1.5L SPH 5/18/2016 36.02 35.76 0.26 2202.01 No Sample Collected: Removed 1L SPH 8/30/2016 33.20 32.95 0.25 2204.83 No Sample Collected: Removed 1 Gal SPH 11/14/2016 34.55 34.50 0.05 2203.32 No Sample Collected 2/15/2017 34.82 34.80 0.02 2203.03 No Sample Collected 5/18/2017 35.20 35.19 0.01 2202.64 No Sample Collected 5/14/2014 36.30 -- -- 2200.63 7.15 18 398 3.9 72.4 9/27/2014 41.00 -- -- 2195.93 7.19 17.86 401 3.94 70.1 12/16/2014 33.59 -- -- 2203.34 NA NA NA NA NA 3/31/2015 35.80 -- -- 2201.13 7.09 15.35 299 2.95 71.5 6/3/2015 34.66 -- -- 2202.27 7.58 14.7 580 6.07 419.8 9/23/2015 29.10 -- -- 2207.83 7.64 13.9 620 4.12 532 MW-15 2236.93 2/10/2016 34.00 -- -- 2202.93 7.22 13.9 485.6 8.39 -8.3 5/18/2016 34.65 -- -- 2202.28 7.15 14.12 489 0.9 -8.9 8/30/2016 30.55 -- -- 2206.38 6.99 13.4 400 1.01 -75 11/14/2016 32.30 -- -- 2204.63 7.72 13.26 2470 7.64 64.9 2/16/2017 32.92 -- -- 2204.01 7.81 13.57 411 5.65 64.7 5/18/2017 33.20 -- -- 2203.73 7.60 13.9 348.2 6.15 109.3 5/14/2014 43.40 -- -- 2193.74 7.15 17.6 346 3.93 66.4 9/27/2014 39.34 -- -- 2197.80 6.97 12.75 830 10.36 22 12/16/2014 40.52 -- -- 2196.62 6.18 11.61 642 2.01 20.1 3/31/2015 43.70 -- -- 2193.44 6.03 10.96 54.2 2.49 -244 6/3/2015 42.26 -- -- 2194.88 7.55 14.1 644 5.20 423.7 9/23/2015 39.05 -- -- 2198.09 7.43 13.81 652 4.32 621 MW-16 2237.14 2/10/2016 41.22 -- -- 2195.92 7.68 12.9 543.4 6.64 -34.7 5/18/2016 42.00 -- -- 2195.14 4.58 12.4 500.4 2.43 -40.2 8/30/2016 39.65 -- -- 2197.49 7.12 13.05 300.1 3.30 -41.2 11/14/2016 39.60 -- -- 2197.54 7.4 12.94 2500 6.3 58.7 2/16/2017 40.41 -- -- 2196.73 7.5 12.75 470 5.24 55.9 5/18/2017 40.13 -- -- 2197.01 7.07 13.1 393 6.93 108.4 Please see notes at end of table.

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 4 of 5 Table 1 Groundwater Elevations and Field Parameters Former Ivy's Jiffy Market, Madras, Oregon

Groundwat Field Parameters Casing Depth to SPH Depth to er Temperatu Conductiv Well ID Elevation Sample Date Water Thickness DO ORP SPH (feet) Elevation pH re ity (feet) (feet) (feet) (ppm) (mV) (feet)* (°C) (µS) 5/14/2014 DRY NA NA NA NA NA NA NA NA 9/27/2014 45.14 -- -- 2191.08 7.11 17.4 335 3.39 66.4 12/16/2014 45.59 -- -- 2190.63 5.87 11.64 817 2 10.1 3/31/2015 47.09 -- -- 2189.13 6.99 13.25 148 2.59 70.4 6/3/2015 46.91 -- -- 2189.31 7.57 14.3 832 5.47 442 9/23/2015 44.22 -- -- 2192.00 7.50 13.9 900 4.38 468 MW-17R 2236.22 2/10/2016 46.07 -- -- 2190.15 7.67 13.2 425.7 6.68 -26.5 5/18/2016 45.80 -- -- 2190.42 7.52 12.9 499 4.4 -14.9 8/30/2016 45.45 -- -- 2190.77 7.33 17.6 308 4.8 -1.03 11/14/2016 44.68 -- -- 2191.54 7.55 12.89 3050 7.51 68.5 2/16/2017 45.04 -- -- 2191.18 7.53 12.72 492 5.91 56.6 5/17/2017 42.94 -- -- 2193.28 7.71 14.3 475 7.68 6.4 9/27/2014 36.70 -- -- 2200.18 7.05 16.32 895 2.94 100 12/16/2014 36.26 -- -- 2200.62 5.74 12.07 1008 2.01 61 3/31/2015 38.70 -- -- 2198.18 6.59 9.86 110 6.24 98.4 6/3/2015 37.48 -- -- 2199.40 7.45 14.0 1310 2.36 300.1 9/23/2015 34.81 -- -- 2202.07 7.32 13.9 1120 3.21 310.1 MW-18 2236.88 2/10/2016 36.30 -- -- 2200.58 7.39 14.3 909 1.49 -58.7 5/18/2016 35.98 -- -- 2200.90 7.22 15.6 861 2.06 -44.5 8/30/2016 33.50 -- -- 2203.38 7.03 14.2 631 3.14 -30.4 11/14/2016 33.74 -- -- 2203.14 7.07 14.99 5160 4.08 70.5 2/16/2017 34.44 -- -- 2202.44 6.89 15.4 877 1.99 70.4 5/18/2017 34.24 -- -- 2202.64 7.22 15.9 738 2.72 109.3

Notes: NA = Not Available (i.e., Well was Dry). -- = Not Applicable (i.e., SPH not encountered). * Groundwater Elevations adjusted for SPH Thickness using specific gravity of 0.78. Groundwater Elevation datum is 1929 NGVD. °C = degrees Celsius. µS = micorSiemen DO (ppm) = dissolved oxygen (parts per million) ORP (mV) = oxidation-reduction potential (millivolt)

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 5 of 5 Table 2 Groundwater Sample Analytical Results Former Ivy's Jiffy Market, Madras, Oregon

Analyte Concentration in µg/L (ppb) Sample 1,2,4- 1,3,5- Sample ID Ethyl- Date TPH-Gx Benzene Toluene Xylenes MTBE Napthalene Trimethyl- Trimethyl- benzene benzene benzenze 5/15/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 9/23/2014 3,300 430 150 46 370 3.6 170 320 170 12/16/2014 270 12 0.89 J 4.6 21 0.72 J 10 14 J 6.4 3/31/2015 45 J <1.0 <1.0 <5.0 <3.0 <1.0 <1.0 <1.0 <1.0 2/11/2016 729 14.5 7.12 <5.0 11.0 3.59 9.75 10.0 31.9 MW-11 5/18/2016 80.8 J 0.456 J <1.0 <5.0 <3.0 0.992 J <5.0 <1.0 1.43 8/30/2016 2,630 112 179 5.84 146 0.803 J 149 296 116 11/14/2016 605 3.43 13.7 <5.0 2.52 J 1.39 1.03 J 1.6 1.18 2/15/2017 60.4 J <1.0 <1.0 <1.0 <3.0 0.476 J <5.0 <1.0 <1.0 5/18/2017 82.5 J <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 5/15/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 9/23/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 12 <1.0 <1.0 12/16/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 3/31/2015 43 J <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 6/3/2015 34 J <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 MW-12 2/11/2016 35.3 J <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 5/18/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 8/30/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 11/14/2016 114 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 2/16/2017 <100 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 5/18/2017 <100 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 5/15/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 9/23/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 12/16/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 3/31/2015 54 J <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 45 J <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 9/23/2015 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 MW-15 2/11/2016 62 J <1.0 0.39 J <5.0 2.44 J <1.0 1.31 J 3.32 1.10 5/18/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 8/30/2016 32.9 J <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 11/14/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 2/16/2017 <100 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 5/18/2017 <100 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 5/15/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 10/2/2014 <500 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 12/16/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 3/31/2015 46 J <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 6/3/2015 36 J <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 9/23/2015 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 MW-16 2/11/2016 <100 <1.0 <1.0 <5.0 1.26 J <1.0 <5.0 0.517 J <1.0 5/18/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 8/30/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 11/14/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 2/16/2017 <100 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 5/18/2017 <100 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 Please see notes at end of table.

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 1 of 2 Table 2 Groundwater Sample Analytical Results Former Ivy's Jiffy Market, Madras, Oregon

Analyte Concentration in µg/L (ppb) Sample 1,2,4- 1,3,5- Sample ID Ethyl- Date TPH-Gx Benzene Toluene Xylenes MTBE Napthalene Trimethyl- Trimethyl- benzene benzene benzenze 9/23/2014 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 12/16/2014 33 J <1.0 <1.0 <5.0 2.3 J 0.51 J <5.0 1.4 J 0.42 J 3/31/2015 <100 <1.0 <1.0 <5.0 <3.0 0.73 J <5.0 <1.0 <1.0 6/3/2015 45 J <1.0 <1.0 <5.0 <3.0 0.86 J <5.0 <1.0 <1.0 9/23/2015 <100 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 MW-17R 2/11/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 5/18/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 8/30/2016 68.7 J <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 11/14/2016 <100 <1.0 <1.0 <5.0 <3.0 <1.0 <5.0 <1.0 <1.0 2/16/2017 <100 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 5/17/2017 <100 <1.0 <1.0 <1.0 <3.0 <1.0 <5.0 <1.0 <1.0 9/23/2014 <100 2.3 <1.0 <5.0 <3.0 0.96 J <5.0 <1.0 <1.0 12/16/2014 <100 2.8 <1.0 2.4 J 2.0 J 17 <5.0 <1.0 <1.0 3/31/2015 88 J 1.0 <1.0 <5.0 <3.0 22 <5.0 <1.0 <1.0 6/3/2015 <100 <1.0 <1.0 <5.0 <3.0 20.5 <5.0 <1.0 <1.0 9/23/2015 86.3 J 58.5 <1.0 <5.0 1.50 J 19.1 <5.0 0.902 J <1.0 MW-18 2/11/2016 138 35.7 <1.0 <5.0 1.11 J 18.6 3.26 J 0.415 J 0.404 J 5/18/2016 36.2 J <1.0 <1.0 <5.0 <3.0 8.02 1.83 J 0.438 J <1.0 8/30/2016 <100 <1.0 <1.0 <5.0 <3.0 0.902 <5.0 <1.0 <1.0 11/14/2016 <100 0.856 J <1.0 <5.0 <3.0 11.6 <5.0 <1.0 <1.0 2/16/2017 40 J <1.0 <1.0 <1.0 <3.0 13.8 <5.0 <1.0 <1.0 5/18/2017 <100 0.859 J <1.0 <1.0 <3.0 7.60 <5.0 <1.0 <1.0 Residential Vapor Intrusion RBC 22,000 210 620 > S 86,000 67,000 840 5,800 > S Occupational Vapor Intrusion RBC > S 2,800 8,200 > S > S 870,000 11,000 > S > S Residential Outdoor Volatilization RBC > S 3,100 9,900 > S > S 350,000 3,600 > S > S Occupational Outdoor Volatilization RBC > S 14,000 43,000 > S > S 1,500,000 16,000 > S > S

Notes: Bold values represent detected concentrations of listed analyte Shaded values represent an exceedance of one or more RBCs Table includes only analytes of interest for the project - additional analytes may be detected, as documented in the laboratory report. TPH-G (Total Petroleum Hydrocarbons - Gasoline Range) Analysis by Northwest Method TPH-Gx. VOC (Volatile Organic Compound) Analysis by EPA Method 8260B. RBC = Oregon DEQ Risk Based Concentration for listed exposure pathway, dated November 1, 2015. > S = RBC Concentration Exceeds Solubility Limit. -- = No Sample Collected. J = The reported concentration is an estimated value based on the results of the data QA review. µg/L (ppb) = Micrograms per liter (parts per billion)

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 2 of 2 Table 3 SVE System Monitoring Former Ivy's Jiffy Market, Madras, Oregon

Sample Hour System Flow Vacuum Measurements [inches of water] Date Meter [cfm] Blower MW-2 MW-3 MW-4 MW-5 MW-6 MW-7

9/1/2016 137 370 47 ------9/30/2016 808 350 40 ------8 8 7 11/14/2016 1,884 350 40 ------2/15/2017 4,115 390 75 1.3 1.5 2 ------5/18/2017 6,298 380 72 ------

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 1 of 1 Table 4 SVE System Analytical Results Former Ivy's Jiffy Market, Madras, Oregon

Analyte Concentration in µg/m3 Mass Removal Calcuations Sample Sample Date 2,2,4-Trimethyl- Flow Rate Flow Rate Mass Flow Mass Flow Hours Mass Removed Cumulative Mass Benzene Toluene Ethylbenzene Total Xylenes Cyclohexane Heptane n-Hexane TPH pentane [cfm] [m3/hr] [g/hr] [lb/hr] Operated [lb] Removed [lb]

Startup (Untreated) 6/13/2016 39,400 6,540 2,740 7,554 57,600 34,400 278,000 105,000 1,880,000 370 629 1516.7 3.34 137 458 458 Influent (Untreated) 9/30/2016 432 545 117 1,900 841 276 1,410 2,690 42,100 350 595 29.9 0.07 671 1,144 1,602 System (Untreated) 11/14/2016 8,720 20,100 2,950 30,660 11,200 12,400 40,600 28,500 518,000 350 595 400.5 0.88 1076 510 2,112 System (Untreated) 2/15/2017 826 1,970 338 2,035 1,250 1,030 4,260 2,530 56,000 390 663 46.6 0.10 2232 1,100 3,212 System (Untreated) 5/18/2017 85 500 52 544 431 307 1,430 1,290 20,000 380 646 15.9 0.04 2183 150 3,363

Inhalation RBC/RSL 0.36 5,200 1.1 100 6,300 -- 730 -- 390 ------Calculated Discharge Limit (Catox Discharge) 1.22E+06 1.76E+10 3.72E+06 3.38E+08 2.13E+10 -- 2.47E+09 -- 1.32E+09 ------

Notes: Bold values represent detected concentrations of listed analyte. Highlighted values represents exceedances of relevant discharge limit or exposure concentration. J = Value considered to be an estimate based on the results of the data quality review. Inhalation RBC from November 1, 2016 DEQ Risk-Based Concentrations for residential exposure. If not available, EPA Regional Screening Level is substituted. Calculated Discharge Limit is derived from EPA Screen3 model with discharge limit concentration set to exposure point concentration equal to RBC/RSL. µg/m3 = micrograms per cubed meter Cumulative mass flow based on average of beginning and ending concentration for each period.

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 1 of 1 Table 5 Soil Vapor Analytical Results Former Ivy's Market, Madras, Oregon

Analyte Concentration in µg/m3 Sample 1,2,4- 1,3,5- Sample ID Ethyl- Date TPH-G Benzene Toluene Xylenes MTBE Naphthalene Trimethyl- Trimethyl- benzene benzene benzene VP-1 12/18/2014 1,500 20 34 180 153 <0.72 <3.3 6.9 3.2 6/3/2015 <210 2.2 <0.87 1.8 4.5 <0.72 <3.3 1.7 <0.98 9/24/2015 <207 <0.639 <0.867 0.999 <2.597 <0.721 <3.3 1.79 <0.982 5/18/2017 Not Sampled - Not Accessible VP-2 9/23/2014 280 <0.64 <0.87 <0.75 <2.57 <0.72 <3.3 <0.98 <0.98 12/18/2014 740 17 6.9 72 31.5 <0.72 <3.3 2.5 <0.98 6/3/2015 370 1.1 5.2 30 12 <0.72 <3.3 2.3 <0.98 9/24/2015 <207 <0.639 <0.867 0.842 <2.597 <0.721 <3.3 1.64 <0.982 5/18/2017 297 0.882 1.09 3.47 6.73 <0.72 <3.3 2.41 <0.98 VP-3 9/23/2014 <210 <0.64 <0.87 1.7 <2.57 <0.72 3.9 2.8 <0.98 12/18/2014 1,600 20 35 220 156 <0.72 <3.3 11 4.8 6/3/2015 <210 1.1 <0.87 1.8 3.67 <0.72 <3.3 1.1 <0.98 9/24/2015 <207 1.11 <0.867 3.95 4.32 <0.721 <3.3 2.88 <0.982 5/18/2017 Not Sampled - Not Accessible VP-4 9/23/2014 310 <0.64 <0.87 2.9 2.0 <0.72 <3.3 <0.98 <0.98 12/18/2014 620 9.3 7.8 68 33.9 <0.72 <3.3 2.0 <0.98 6/3/2015 270 4.5 1.8 7.5 10.3 <0.72 4.2 3.9 1.2 9/24/2015 <207 <0.639 <0.867 7.93 2.66 <0.721 <3.3 1.4 <0.982 5/18/2017 246 0.679 1.38 3.06 8.29 <0.72 <3.3 4.04 1.08

DEQ RBC - Residential Soil Gas 79,000 72 220 1,000,000 21,000 2,200 17 1,500 >Pv DEQ RBC - Occupational Soil Gas 1,700,000 1,600 4,900 2.2E+07 440,000 47,000 360 31,000 >Pv

Notes: Bold values represent detected concentrations of listed analyte Shaded values represent an exceedance of one or more RBCs µg/m3 = micrograms per cubic meter TPH-G (Total Petroleum Hydrocarbons - Gasoline Range) Analysis by Northwest Method TPH-Gx. VOC (Volatile Organic Compound) Analysis by EPA Method 8260B. >Pv = The air concentration reported for the RBC exceeds the vapor pressure of the pure chemical. It can be assumed that this constituent cannot create an unacceptable risk by this pathway. DEQ RBC = Oregon Department of Environmental Quality Risk Based Concentration for listed exposure pathway, dated November 1, 2015.

Second Quarter 2017 Site Investigation Data Report 2103-00 Page 1 of 1 Site

Note: Base map prepared from USGS 7.5-minute quadrangles of Madras West and East, OR, dated 2011 as provided by USGS.gov. 0 2,000 4,000 Approximate Scale in Feet

Site Location Map Madras Second Quarter 2017 Site Investigation Data Report Former Ivy's Jiffy Market Site Madras, Oregon

Apex Companies, LLC Project Number 2103- 00 Figure 3015 SW First Avenue Portland, Oregon 97201 June 2017 1 Pine Street

Farm Supply Store MW-17R LMW-13 MW-17

VP-1

MW-18 LMW-11 MW-12 A Street Legend:

MW-14 Ivy’s Monitoring Well Location (2014 Investigation) MW-16 CMW-2 VP-2 MW-1 Ivy's Monitoring Well Location (Shallow Well; 1999) SVE-5 Carson Oil Madras MW-5 Ivy’s Monitoring Well Location (Deep Well; 2008) CFN Card Lock MW-14 PossibleCMW Former-1 Carson Oil Monitoring Well Location (ECI, 2008) Auto Parts Underground Service Station Store Storage Tanks LMW-1 Leathers MonitoringMW-7 Well Location

Gasoline VP-1 Soil Vapor Monitoring Point Location

Gasoline SVE-1 Soil Vapor Extraction System Well Location SVE-4 Diesel Third Street Fourth Street Diesel LMW-9

MW-13 Fuel Dispenser LMW-6 Islands Auto Parts CMW-1 Store SVE-3 Former MW-6 MW-2 Dispensers MW-3 PW-1 EX-1 MW-8 MW-7 MW-5 MW-4 MW-15 SVE-2 MW-9 MW-4

Former UST Fifth Street Sixth Street Cavity Former Underground MW-3 MW-12 VP-3 Storage Tanks 0 50 100 SVE-1 MW-5 Approximate ScaleLeathers in Feet Oil Former Ivy's MW-10 Jiffy Mart Service Station MW-1 MW-2 LMW-10 Site and Exploration Plan (Abandoned) Second Quarter 2017 MW-1 VP-4 Site Investigation Data Report Former Ivy's Jiffy Market Site MW-11 Madras, Oregon Former McDonald Auto Dealership Apex Companies, LLC Project Number 2103-Canopy00 Figure NOTE: Base map prepared from a Google aerial dated June 27, 2013, a Jefferson County Tax Map (11.13.2DD), and various historical reports. 3015 SW First Avenue Portland, Oregon 97201 June 2017 2

MW-8 Site Boundary B Street Pine Street

Farm Supply Store MW-17R LMW-13 2193.28 MW-17

2194

MW-18 LMW-11 2202.64

2196 MW-12 A Street Legend:

MW-16 Ivy’s Monitoring Well Location (2014 Investigation) MW-16 CMW-2 2196.73 Groundwater Elevation (Feet MSL) 2196.73 SVE-5 2192 Groundwater Elevation Contour Carson Oil Madras CFN Card Lock MW-1 Ivy's Monitoring Well Location (Shallow Well; 1999) 2198 MW-14 Possible Former 2202.64 Auto Parts Underground ServiceMW Station-5 Ivy’s Monitoring Well Location (Deep Well; 2008) Store Storage Tanks MW-7 CMW-1 Carson Oil Monitoring Well Location (ECI, 2008) Gasoline LMW-1 Leathers Monitoring Well Location Gasoline Third Street SVE-1 Soil Vapor Extraction System Well Location SVE-4 Diesel Fourth Street 2200 Diesel LMW-9 Fuel Dispenser Islands MW-13 LMW-6 2204.52 Auto Parts

2202 MW-6 CMW-1 Store 2212.57 SVE-3 Former MW-2 MW-8 Dispensers MW-3 PW-1 EX-1 Dry 2213.41 MW-15 Dry MW-7 2203.73 SVE-2 MW-5 2213.16 MW-4 2210.40 MW-9 2204 MW-4 2213.90 2206 Dry

2208 Fifth Street Sixth Street Former Underground 2210 Former UST MW-3 MW-12 Storage Tanks 2210.91 Cavity 0 50 100 SVE-1 MW-5 2212 Approximate ScaleLeathers in Feet Oil Former Ivy's Jiffy Mart Service Station MW-1 MW-10 Dry DRY MW-2 LMW-10 Groundwater Elevations (Abandoned) Second Quarter 2017 MW-1 2214 Site Investigation Data Report MW-11 Former Ivy's Jiffy Market Site 2215.52 Madras, Oregon Former McDonald Auto Dealership Apex Companies, LLC Project Number 2103-00 Figure 3015 SW First Avenue Canopy NOTE: Base map prepared from a Google aerial dated June 27, 2013, a Jefferson County Tax Map (11.13.2DD), and various historical reports. Portland, Oregon 97201 June 2017 3

MW-8 Site Boundary B Street Pine Street

Farm Supply Store MW-17R LMW-13 TPH ND MW-17 Benz ND BTEX ND VOCs ND

? MW-18 Legend: TPH ND LMW-11 MW-12 Benz ND MW-11 Ivy’s Monitoring Well Location (2014 Investigation) BTEX ND TPH 82.5J Total Petroleum Hydrocarbon Concentration in µg/L VOCs 7.6 A Street Benz ND Benzene Concentration in µg/L BTEX ND Total BTEX Concentration in µg/L VOCs ND Total VOCs Concentration in µg/L

MW-16 CMW-2 ND = Not Detected at Laboratory Reporting Limit TPH ND SPH = Separate Phase Hydrocarbons and Benz ND SVE-5 (Thickness in Feet) BTEX ND Possible Former NS = Not Sampled (Well Dry) MW-14 Carson Oil Madras VOCs ND S CFN Card Lock Service Station J = Estimated Value SPH (0.01') MW-7 Auto Parts S Estimated Extent of SPH Underground (Dashed Where Inferred) S Store Storage Tanks Estimated Extent of Benzene Above RBCs GasolineS (Dashed Where Inferred) Gasoline MW-1 Ivy's Monitoring Well Location (Shallow Well; 1999) SVE-4 Diesel Third Street Fourth Street MW-5 Ivy’s Monitoring Well Location (Deep Well; 2008) Diesel S

S LMW-9 CMW-1 Carson Oil Monitoring Well Location (ECI, 2008) MW-13 SPH (0.02') LMW-1 Leathers Monitoring Well Location Fuel Dispenser S LMW-6 SVE-1 Soil Vapor Extraction System Well Location Islands Auto Parts CMW-1 S MW-6 Store SPH (2.06') SVE-3 MW-2 Former NS Dispensers MW-3 PW-1 EX-1 MW-8 NS SPH (0.01') MW-7 S S SPH (0.94') MW-15 MW-5 MW-4 SPH (0.89') TPH ND SVE-2 MW-4 MW-9 Benz ND NS SPH (0.02') BTEX ND Former UST VOCs ND S Fifth Street Sixth Street Cavity S Former Underground MW-3 MW-12 Storage Tanks S TPH ND 0 50 100 Benz ND SVE-1 MW-5 Approximate ScaleLeathers in Feet Oil BTEX ND Former Ivy's VOCs ND Jiffy Mart MW-1 Service Station NS MW-10 NS MW-2 LMW-10 Petroleum Hydrocarbons in Groundwater (Abandoned) Second Quarter 2017 MW-1 MW-11 Site Investigation Data Report TPH 82.5J Former Ivy's Jiffy Market Site Benz ND Madras, Oregon BTEX ND Former McDonald VOCs ND Auto Dealership Apex Companies, LLC Project Number 2103-Canopy00 Figure NOTE: Base map prepared from a Google aerial dated June 27, 2013, a Jefferson County Tax Map (11.13.2DD), and various historical reports. 3015 SW First Avenue Portland, Oregon 97201 June 2017 4

MW-8 Site Boundary B Street

Appendix A Laboratory Analytical Report and Data Quality Review

Appendix A – QA/QC Review

This appendix documents the results of a quality assurance/quality control (QA/QC) review of the analytical data for groundwater and system air samples collected in May 2017 for the Former Ivy’s Jiffy Market Supplemental Site Investigation project. Samples were analyzed by ESC Lab Sciences of Mount Juliet, Tennessee. A copy of the analytical laboratory report is included in this appendix, referenced as follows:

Report Report Date Sampling Event L911004 June 1, 2017 Groundwater Samples L911085 June 1, 2017 System Air Sample/Soil Vapor Samples

1.0 Analytical Methods

Chemical analyses consisted of the following: • Total petroleum hydrocarbons as gasoline (TPHg) in groundwater by NWTPH-Gx • Volatile organic compounds (VOCs) in groundwater by U.S. Environmental Protection Agency (EPA) Method 8260B

• Volatile organic compounds (VOCs) in air by U.S. Environmental Protection Agency (EPA) Method TO-15.

2.0 Data Validation

The QA review included examination and validation of the laboratory data packages for the following:

• Analytical preparation and quantitation methods • Analytical method holding times • Sample handling • Chain of custody procedures • Detection and reporting limits • Method blank detections • Laboratory control samples, matrix spikes and surrogates to assess laboratory accuracy • Laboratory control sample duplicates, matrix spike duplicates and field duplicates to assess laboratory precision

The QA/QC review did not include a review of raw data.

This QA/QC review documents the relationship between analytical findings and data quality objectives based on precision and accuracy. It also summarizes possible error or bias and the effect on data quality and usability.

Second Quarter 2017 Site Investigation Data Report Page A-1 Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 Appendix A – QA/QC Review

The laboratory quality control (QC) samples provided in data packages were used to evaluate laboratory contamination or background interferences, sample preparation efficiency and instrumentation performance. The QC samples provided by the analytical laboratory are from the Environmental Protection Agency (EPA) and NWTPH methods for VOCs and gasoline range organics respectively, which included: method blanks, laboratory control samples (LCS/LCSD) and matrix spikes (MS/MSD). Surrogates are also required for VOC and gasoline range organics methods to assess sample preparation efficiency and matrix interferences.

2.1 Data Qualifiers

Any data that is found to have possible bias or error was qualified and flagged. The following are definitions of qualifiers used in this data quality report and data tables.

J Data results are estimated values. In this QA/QC review report, this qualifier is indicative of sample results that are between the minimum detection limit and the reporting limit.

3.0 Data Quality Assurance Review

The general QA objectives for this project were to develop and implement procedures for obtaining, evaluating, and confirming the usability of data of a specified quality. To collect such information, analytical data must have an appropriate degree of accuracy and reproducibility, samples collected must be representative of actual field conditions, and samples must be collected and analyzed using unbroken chain-of-custody procedures.

Reporting limits and analytical results were compared to cleanup and screening levels for each parameter in the matrix of concern. Precision, accuracy, completeness, and comparability parameters used to indicate data quality are discussed below.

3.1 Reporting Limits

Reporting limits are the lowest concentration an instrument is capable of accurately detecting an analyte. Reporting limits are determined by the laboratory and are based on instrumentation capabilities, the matrix of field samples, sample preparation procedures and EPA suggested reporting limits.

The reporting limits were consistent with method standards and were below screening level values. Several analytes were identified by the laboratory at concentrations that were below the laboratory reporting limit for the compound, but were above the method detection limit. These concentrations are estimated values and have been “J” flagged accordingly.

Second Quarter 2017 Site Investigation Data Report Page A-2 Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 Appendix A – QA/QC Review

3.2 Holding Times and Sample Receipt

The holding time is the minimum amount of time the sample can be stored before analytes start to degrade and are not representative of initial sampling concentrations. Holding times are defined by analytical methods. Below is a table outlining method holding times based on sampling procedures during this sampling event.

Method Matrix Analytes Preservative Hold Time

Hydrochloric Acid (HCl) to pH EPA Water VOCs < 2; No headspace; VOA 14 days 8260B container Hydrochloric Acid (HCl) to pH NWTPH- Water Gasoline Range Organics < 2; No headspace; VOA 14 days Gx container TO-15 Air VOCs Summa Canister 30 days

The holding time for VOC analysis by EPA method 8260B and gasoline analysis by NWTPH-Gx in groundwater that has been sampled without headspace, in a volatile organic analysis (VOA) container and preserved with hydrochloric acid (HCl) to a pH<2 is 14 days from the time of sampling to analysis. Air that has been sampled in summa canisters and analyzed by EPA method TO-15, has a holding time of 30 days from the time of sampling to analysis. The groundwater and air samples included in this data quality review were analyzed within hold.

The integrity of samples ensures that samples received by the laboratory are representative of the field. The groundwater and air sampling containers were received intact and unbroken upon receipt by the analytical laboratories. Groundwater from sample delivery group L911004 was received by the analytical laboratory below 4⁰C and without headspace in the VOA container. The chain of custody was relinquished by the Apex Companies sampler and received by the analytical laboratory as indicated by signatures. The sample ID, collection time and requested analyses were all properly filled in by the Apex Companies sampler.

3.3 Method Blanks

A method – or laboratory – blank is a sample prepared in the laboratory along with the actual samples and analyzed for the same parameters at the same time. It is used to assess if detected compounds may have been the result of contamination or background levels in the laboratory. Analytes were not detected in the laboratory method blanks above the method detection limits for report L911004, which contained groundwater samples. Naphthalene was detected in the method blank for the QC batch WG983150 of report L911085. Air samples collected for Former Ivy’s Jiffy Market did not contain naphthalene; therefore, the naphthalene contamination in the method blank did not contribute to naphthalene concentrations in the air samples and no data was flagged.

Second Quarter 2017 Site Investigation Data Report Page A-3 Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 Appendix A – QA/QC Review

3.4 Accuracy

Accuracy is assessed through the comparison of analytes of known concentration to concentrations determined analytically. A percent recovery is calculated from the analytical concentration to the known concentration of analyte, which must be within control limits established by methods. If the percent recovery is outside of control limits, then data might be compromised. The analytical laboratory will provide quality control samples and surrogates to help determine the accuracy of the data provided. These quality control samples and surrogates are discussed below.

3.4.1 Laboratory Control Samples

Laboratory control samples (LCS) and laboratory control duplicate samples (LCSD) were analyzed by the laboratory to assess the accuracy of the analytical methods. One set of LCS and LCSDs were analyzed per analytical batch. The samples were prepared from an analyte-free matrix that is then spiked with known levels of constituents of interest (COI; i.e., a standard). The concentrations were measured and the results compared to the known spiked levels. This comparison is expressed as percent recovery. Percent recoveries for analytes presented in the data table were within quality control limits.

3.4.2 Matrix Spikes

A matrix spike QC sample is used to assess the performance of the analytical method by determining potential matrix interferences. Matrix spike (MS) and matrix spike duplicate (MSD) analyses are performed on one environmental sample per analytical batch. A matrix spike sample uses an environmental sample that is spiked with known concentrations of analytes of interest. The matrix spike is then prepared and analyzed with the same analytical procedures as environmental samples in the analytical batch. The resulting concentration of the matrix spike is then compared to the known - or true - values plus the non- spiked environmental sample concentration. This comparison is expressed as a percent recovery. The recovery of spiked analytes were within quality control limits.

3.4.3 Surrogates

Surrogates are organic compounds that are similar in chemical composition to the analytes of interest but are not likely to be found in the environment. They are spiked into environmental and batch QC samples prior to sample preparation and analysis. Surrogate recoveries for environmental samples are used to evaluate matrix interference and sample preparation and analysis efficiency on a sample-specific basis. Surrogate recoveries were within quality control limits.

Second Quarter 2017 Site Investigation Data Report Page A-4 Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 Appendix A – QA/QC Review

3.5 Precision

Precision is measured by how close concentrations of duplicate analyses are to each other. These duplicate analyses are of separate aliquots of the same sample that are prepared or analyzed at the same (or similar) time. Precision in the field ensures that samples taken are representative of field concentrations. Field precision is demonstrated by field duplicates. Analytical precision is measured by the laboratory through duplicate analysis of samples and quality control samples. Precision is estimated by the relative percent difference (RPD) between the original analysis and the duplicate analysis.

3.5.1 Laboratory Control Samples

LCSD analyte concentrations were compared to LCS analyte concentrations to assess the precision of the analytical method. This comparison can be expressed by the relative percent difference (RPD) between the LCS and LCSD samples. The RPD control limit was exceeded for naphthalene in batch WG984163 of report L911004. Precision quality control standards were not applied to the naphthalene result for MW-17R in this QA review since there was no quantifiable result. The data for naphthalene in MW-17R was not flagged in the table.

3.5.2 Matrix Spikes

Similar to the LCS/LCSD, the MS/MSD analyte concentrations are also compared to each other and expressed as a RPD. The RPD values for analytical batch MS/MSD were within the control limits.

3.5.3 Field Duplicate

A field duplicate is a second field sample collected from a selected sample location. Field duplicate samples serve as a check on laboratory quality, sampling quality, as well as potential variability of the sample matrix. The field duplicate is analyzed and compared to the original sample to assess the precision of the analytical method. This comparison can be expressed by the RPD between the original and duplicate samples. The field duplicate sample for groundwater was collected from well MW-11. The RPD values for MW-11 and the duplicate analysis were within control limits.

4.0 Conclusion

In conclusion, the QA objectives have been met and the data are of sufficient quality for use in this project.

Second Quarter 2017 Site Investigation Data Report Page A-5 Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 ANALYTICAL REPORT June 01, 2017

Oregon Dept. of Env. Quality - ODEQ Sample Delivery Group: L911004 Samples Received: 05/20/2017 Project Number: 2103-00 Description: DEQ-Ivy's Market

Report To: Katie Robertson 3150 NW 229th St., Suite 150 Hillsboro, OR 97124

Entire Report Reviewed By: [Preliminary Report] Brian Ford Technical Service Representative

Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by ESC is performed per guidance provided in laboratory standard operating procedures: 060302, 060303, and 060304.

12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.esclabsciences.com TABLE OF CONTENTS ONE LAB. NATIONWIDE.

Cp: Cover Page 1 1 Cp Tc: Table of Contents 2

2 Ss: Sample Summary 3 Tc Cn: Case Narrative 4 3 Sr: Sample Results 5 Ss

MW-11 L911004-01 5 4 Cn MW-12 L911004-02 7

5 MW-15 L911004-03 9 Sr MW-16 L911004-04 11 6 MW-17R L911004-05 13 Qc

MW-18 L911004-06 15 7 Gl DUP L911004-07 17

8 Qc: Quality Control Summary 19 Al Volatile Organic Compounds (GC) by Method NWTPHGX 19 9 Volatile Organic Compounds (GC/MS) by Method 8260B 21 Sc Gl: Glossary of Terms 29 Al: Accreditations & Locations 30 Sc: Chain of Custody 31

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 2 of 32 SAMPLE SUMMARY ONE LAB. NATIONWIDE.

Collected by Collected date/time Received date/time Chris Clough 05/18/17 10:10 05/20/17 08:45 1 MW-11 L911004-01 GW Cp Method Batch Dilution Preparation Analysis Analyst 2 date/time date/time Tc Volatile Organic Compounds (GC) by Method NWTPHGX WG982900 1 05/26/17 21:01 05/26/17 21:01 ACG

Volatile Organic Compounds (GC/MS) by Method 8260B WG984594 1 05/31/17 22:31 05/31/17 22:31 ACG 3 Ss

Collected by Collected date/time Received date/time 4 MW-12 L911004-02 GW Chris Clough 05/18/17 09:35 05/20/17 08:45 Cn Method Batch Dilution Preparation Analysis Analyst 5 date/time date/time Sr Volatile Organic Compounds (GC) by Method NWTPHGX WG982900 1 05/26/17 21:23 05/26/17 21:23 ACG 6 Volatile Organic Compounds (GC/MS) by Method 8260B WG984594 1 05/31/17 22:48 05/31/17 22:48 ACG Qc

Collected by Collected date/time Received date/time 7 Gl MW-15 L911004-03 GW Chris Clough 05/18/17 07:55 05/20/17 08:45

Method Batch Dilution Preparation Analysis Analyst 8 date/time date/time Al Volatile Organic Compounds (GC) by Method NWTPHGX WG982900 1 05/26/17 21:45 05/26/17 21:45 ACG 9 Volatile Organic Compounds (GC/MS) by Method 8260B WG984594 1 05/31/17 23:05 05/31/17 23:05 ACG Sc

Collected by Collected date/time Received date/time MW-16 L911004-04 GW Chris Clough 05/18/17 07:30 05/20/17 08:45 Method Batch Dilution Preparation Analysis Analyst date/time date/time Volatile Organic Compounds (GC) by Method NWTPHGX WG982900 1 05/26/17 22:07 05/26/17 22:07 ACG Volatile Organic Compounds (GC/MS) by Method 8260B WG984594 1 05/31/17 23:22 05/31/17 23:22 ACG

Collected by Collected date/time Received date/time MW-17R L911004-05 GW Chris Clough 05/17/17 14:55 05/20/17 08:45 Method Batch Dilution Preparation Analysis Analyst date/time date/time Volatile Organic Compounds (GC) by Method NWTPHGX WG983163 1 05/26/17 16:09 05/26/17 16:09 LRL Volatile Organic Compounds (GC/MS) by Method 8260B WG984163 1 05/30/17 13:16 05/30/17 13:16 DWR Volatile Organic Compounds (GC/MS) by Method 8260B WG984163 1 05/31/17 15:51 05/31/17 15:51 JHH

Collected by Collected date/time Received date/time MW-18 L911004-06 GW Chris Clough 05/18/17 08:45 05/20/17 08:45 Method Batch Dilution Preparation Analysis Analyst date/time date/time Volatile Organic Compounds (GC) by Method NWTPHGX WG983163 1 05/26/17 17:44 05/26/17 17:44 LRL Volatile Organic Compounds (GC/MS) by Method 8260B WG984594 1 05/31/17 23:39 05/31/17 23:39 ACG

Collected by Collected date/time Received date/time DUP L911004-07 GW Chris Clough 05/18/17 00:00 05/20/17 08:45 Method Batch Dilution Preparation Analysis Analyst date/time date/time Volatile Organic Compounds (GC) by Method NWTPHGX WG983163 1 05/26/17 18:08 05/26/17 18:08 LRL Volatile Organic Compounds (GC/MS) by Method 8260B WG984594 1 05/31/17 23:56 05/31/17 23:56 ACG

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 3 of 32 CASE NARRATIVE ONE LAB. NATIONWIDE.

1 Cp All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times. All MDL (LOD) and RDL (LOQ) 2 values reported for environmental samples have been corrected for the dilution factor used in the Tc analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my 3 digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the Ss laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the 4 data. Cn

5 Sr

6 Qc [Preliminary Report] 7 Gl

Brian Ford 8 Technical Service Representative Al

9 Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 4 of 32 MW-11 SAMPLE RESULTS - 01 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 10:10 L911004

Volatile Organic Compounds (GC) by Method NWTPHGX 1 Cp Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 2 Gasoline Range Tc Organics-NWTPH 82.5 J 31.6 100 1 05/26/2017 21:01 WG982900 (S) a,a,a-Trifluorotoluene(FID) 94.8 77.0-122 05/26/2017 21:01 WG982900 3 Ss Volatile Organic Compounds (GC/MS) by Method 8260B 4 Result Qualifier MDL RDL Dilution Analysis Batch Cn Analyte ug/l ug/l ug/l date / time 5 Acetone 15.7 J 10.0 50.0 1 05/31/2017 22:31 WG984594 Sr Acrolein U J4 8.87 50.0 1 05/31/2017 22:31 WG984594 Acrylonitrile U 1.87 10.0 1 05/31/2017 22:31 WG984594 6 Benzene U 0.331 1.00 1 05/31/2017 22:31 WG984594 Qc Bromobenzene U 0.352 1.00 1 05/31/2017 22:31 WG984594 7 Bromodichloromethane U 0.380 1.00 1 05/31/2017 22:31 WG984594 Gl Bromoform U 0.469 1.00 1 05/31/2017 22:31 WG984594 Bromomethane U 0.866 5.00 1 05/31/2017 22:31 WG984594 8 n-Butylbenzene U 0.361 1.00 1 05/31/2017 22:31 WG984594 Al sec-Butylbenzene U 0.365 1.00 1 05/31/2017 22:31 WG984594 9 tert-Butylbenzene U 0.399 1.00 1 05/31/2017 22:31 WG984594 Sc Carbon disulfide U 0.275 1.00 1 05/31/2017 22:31 WG984594 Carbon tetrachloride U 0.379 1.00 1 05/31/2017 22:31 WG984594 Chlorobenzene U 0.348 1.00 1 05/31/2017 22:31 WG984594 Chlorodibromomethane U 0.327 1.00 1 05/31/2017 22:31 WG984594 Chloroethane U J3 0.453 5.00 1 05/31/2017 22:31 WG984594 Chloroform U 0.324 5.00 1 05/31/2017 22:31 WG984594 Chloromethane U 0.276 2.50 1 05/31/2017 22:31 WG984594 2-Chlorotoluene U 0.375 1.00 1 05/31/2017 22:31 WG984594 4-Chlorotoluene U 0.351 1.00 1 05/31/2017 22:31 WG984594 1,2-Dibromo-3-Chloropropane U 1.33 5.00 1 05/31/2017 22:31 WG984594 1,2-Dibromoethane U 0.381 1.00 1 05/31/2017 22:31 WG984594 Dibromomethane U 0.346 1.00 1 05/31/2017 22:31 WG984594 1,2-Dichlorobenzene U 0.349 1.00 1 05/31/2017 22:31 WG984594 1,3-Dichlorobenzene U 0.220 1.00 1 05/31/2017 22:31 WG984594 1,4-Dichlorobenzene U 0.274 1.00 1 05/31/2017 22:31 WG984594 Dichlorodifluoromethane U 0.551 5.00 1 05/31/2017 22:31 WG984594 1,1-Dichloroethane U 0.259 1.00 1 05/31/2017 22:31 WG984594 1,2-Dichloroethane U 0.361 1.00 1 05/31/2017 22:31 WG984594 1,1-Dichloroethene U 0.398 1.00 1 05/31/2017 22:31 WG984594 cis-1,2-Dichloroethene U 0.260 1.00 1 05/31/2017 22:31 WG984594 trans-1,2-Dichloroethene U 0.396 1.00 1 05/31/2017 22:31 WG984594 1,2-Dichloropropane U 0.306 1.00 1 05/31/2017 22:31 WG984594 1,1-Dichloropropene U 0.352 1.00 1 05/31/2017 22:31 WG984594 1,3-Dichloropropane U 0.366 1.00 1 05/31/2017 22:31 WG984594 cis-1,3-Dichloropropene U 0.418 1.00 1 05/31/2017 22:31 WG984594 trans-1,3-Dichloropropene U 0.419 1.00 1 05/31/2017 22:31 WG984594 2,2-Dichloropropane U 0.321 1.00 1 05/31/2017 22:31 WG984594 Di-isopropyl ether U 0.320 1.00 1 05/31/2017 22:31 WG984594 Ethylbenzene U 0.384 1.00 1 05/31/2017 22:31 WG984594 Hexachloro-1,3-butadiene U 0.256 1.00 1 05/31/2017 22:31 WG984594 Isopropylbenzene U 0.326 1.00 1 05/31/2017 22:31 WG984594 p-Isopropyltoluene U 0.350 1.00 1 05/31/2017 22:31 WG984594 2-Butanone (MEK) U 3.93 10.0 1 05/31/2017 22:31 WG984594 Methylene Chloride U 1.00 5.00 1 05/31/2017 22:31 WG984594 4-Methyl-2-pentanone (MIBK) U 2.14 10.0 1 05/31/2017 22:31 WG984594 Methyl tert-butyl ether U 0.367 1.00 1 05/31/2017 22:31 WG984594 Naphthalene U 1.00 5.00 1 05/31/2017 22:31 WG984594 n-Propylbenzene U 0.349 1.00 1 05/31/2017 22:31 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 5 of 32 MW-11 SAMPLE RESULTS - 01 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 10:10 L911004 Volatile Organic Compounds (GC/MS) by Method 8260B 1 Result Qualifier MDL RDL Dilution Analysis Batch Cp Analyte ug/l ug/l ug/l date / time 2 Styrene U 0.307 1.00 1 05/31/2017 22:31 WG984594 Tc 1,1,1,2-Tetrachloroethane U 0.385 1.00 1 05/31/2017 22:31 WG984594

1,1,2,2-Tetrachloroethane U 0.130 1.00 1 05/31/2017 22:31 WG984594 3 1,1,2-Trichlorotrifluoroethane U 0.303 1.00 1 05/31/2017 22:31 WG984594 Ss Tetrachloroethene U 0.372 1.00 1 05/31/2017 22:31 WG984594 4 Toluene U 0.412 1.00 1 05/31/2017 22:31 WG984594 Cn 1,2,3-Trichlorobenzene U 0.230 1.00 1 05/31/2017 22:31 WG984594

1,2,4-Trichlorobenzene U 0.355 1.00 1 05/31/2017 22:31 WG984594 5 1,1,1-Trichloroethane U 0.319 1.00 1 05/31/2017 22:31 WG984594 Sr 1,1,2-Trichloroethane U 0.383 1.00 1 05/31/2017 22:31 WG984594 6 Trichloroethene U 0.398 1.00 1 05/31/2017 22:31 WG984594 Qc Trichlorofluoromethane U 1.20 5.00 1 05/31/2017 22:31 WG984594

1,2,3-Trichloropropane U 0.807 2.50 1 05/31/2017 22:31 WG984594 7 1,2,4-Trimethylbenzene U 0.373 1.00 1 05/31/2017 22:31 WG984594 Gl 1,2,3-Trimethylbenzene U 0.321 1.00 1 05/31/2017 22:31 WG984594 8 1,3,5-Trimethylbenzene U 0.387 1.00 1 05/31/2017 22:31 WG984594 Al Vinyl chloride U 0.259 1.00 1 05/31/2017 22:31 WG984594

Xylenes, Total U 1.06 3.00 1 05/31/2017 22:31 WG984594 9 (S) Toluene-d8 98.9 80.0-120 05/31/2017 22:31 WG984594 Sc (S) Dibromofluoromethane 87.4 76.0-123 05/31/2017 22:31 WG984594 (S) 4-Bromofluorobenzene 107 80.0-120 05/31/2017 22:31 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 6 of 32 MW-12 SAMPLE RESULTS - 02 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 09:35 L911004

Volatile Organic Compounds (GC) by Method NWTPHGX 1 Cp Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 2 Gasoline Range Tc Organics-NWTPH U 31.6 100 1 05/26/2017 21:23 WG982900 (S) a,a,a-Trifluorotoluene(FID) 95.0 77.0-122 05/26/2017 21:23 WG982900 3 Ss Volatile Organic Compounds (GC/MS) by Method 8260B 4 Result Qualifier MDL RDL Dilution Analysis Batch Cn Analyte ug/l ug/l ug/l date / time 5 Acetone U 10.0 50.0 1 05/31/2017 22:48 WG984594 Sr Acrolein U J4 8.87 50.0 1 05/31/2017 22:48 WG984594 Acrylonitrile U 1.87 10.0 1 05/31/2017 22:48 WG984594 6 Benzene U 0.331 1.00 1 05/31/2017 22:48 WG984594 Qc Bromobenzene U 0.352 1.00 1 05/31/2017 22:48 WG984594 7 Bromodichloromethane U 0.380 1.00 1 05/31/2017 22:48 WG984594 Gl Bromoform U 0.469 1.00 1 05/31/2017 22:48 WG984594 Bromomethane U 0.866 5.00 1 05/31/2017 22:48 WG984594 8 n-Butylbenzene U 0.361 1.00 1 05/31/2017 22:48 WG984594 Al sec-Butylbenzene U 0.365 1.00 1 05/31/2017 22:48 WG984594 9 tert-Butylbenzene U 0.399 1.00 1 05/31/2017 22:48 WG984594 Sc Carbon disulfide U 0.275 1.00 1 05/31/2017 22:48 WG984594 Carbon tetrachloride U 0.379 1.00 1 05/31/2017 22:48 WG984594 Chlorobenzene U 0.348 1.00 1 05/31/2017 22:48 WG984594 Chlorodibromomethane U 0.327 1.00 1 05/31/2017 22:48 WG984594 Chloroethane U J3 0.453 5.00 1 05/31/2017 22:48 WG984594 Chloroform U 0.324 5.00 1 05/31/2017 22:48 WG984594 Chloromethane U 0.276 2.50 1 05/31/2017 22:48 WG984594 2-Chlorotoluene U 0.375 1.00 1 05/31/2017 22:48 WG984594 4-Chlorotoluene U 0.351 1.00 1 05/31/2017 22:48 WG984594 1,2-Dibromo-3-Chloropropane U 1.33 5.00 1 05/31/2017 22:48 WG984594 1,2-Dibromoethane U 0.381 1.00 1 05/31/2017 22:48 WG984594 Dibromomethane U 0.346 1.00 1 05/31/2017 22:48 WG984594 1,2-Dichlorobenzene U 0.349 1.00 1 05/31/2017 22:48 WG984594 1,3-Dichlorobenzene U 0.220 1.00 1 05/31/2017 22:48 WG984594 1,4-Dichlorobenzene U 0.274 1.00 1 05/31/2017 22:48 WG984594 Dichlorodifluoromethane U 0.551 5.00 1 05/31/2017 22:48 WG984594 1,1-Dichloroethane U 0.259 1.00 1 05/31/2017 22:48 WG984594 1,2-Dichloroethane U 0.361 1.00 1 05/31/2017 22:48 WG984594 1,1-Dichloroethene U 0.398 1.00 1 05/31/2017 22:48 WG984594 cis-1,2-Dichloroethene U 0.260 1.00 1 05/31/2017 22:48 WG984594 trans-1,2-Dichloroethene U 0.396 1.00 1 05/31/2017 22:48 WG984594 1,2-Dichloropropane U 0.306 1.00 1 05/31/2017 22:48 WG984594 1,1-Dichloropropene U 0.352 1.00 1 05/31/2017 22:48 WG984594 1,3-Dichloropropane U 0.366 1.00 1 05/31/2017 22:48 WG984594 cis-1,3-Dichloropropene U 0.418 1.00 1 05/31/2017 22:48 WG984594 trans-1,3-Dichloropropene U 0.419 1.00 1 05/31/2017 22:48 WG984594 2,2-Dichloropropane U 0.321 1.00 1 05/31/2017 22:48 WG984594 Di-isopropyl ether U 0.320 1.00 1 05/31/2017 22:48 WG984594 Ethylbenzene U 0.384 1.00 1 05/31/2017 22:48 WG984594 Hexachloro-1,3-butadiene U 0.256 1.00 1 05/31/2017 22:48 WG984594 Isopropylbenzene U 0.326 1.00 1 05/31/2017 22:48 WG984594 p-Isopropyltoluene U 0.350 1.00 1 05/31/2017 22:48 WG984594 2-Butanone (MEK) U 3.93 10.0 1 05/31/2017 22:48 WG984594 Methylene Chloride U 1.00 5.00 1 05/31/2017 22:48 WG984594 4-Methyl-2-pentanone (MIBK) U 2.14 10.0 1 05/31/2017 22:48 WG984594 Methyl tert-butyl ether U 0.367 1.00 1 05/31/2017 22:48 WG984594 Naphthalene U 1.00 5.00 1 05/31/2017 22:48 WG984594 n-Propylbenzene U 0.349 1.00 1 05/31/2017 22:48 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 7 of 32 MW-12 SAMPLE RESULTS - 02 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 09:35 L911004 Volatile Organic Compounds (GC/MS) by Method 8260B 1 Result Qualifier MDL RDL Dilution Analysis Batch Cp Analyte ug/l ug/l ug/l date / time 2 Styrene U 0.307 1.00 1 05/31/2017 22:48 WG984594 Tc 1,1,1,2-Tetrachloroethane U 0.385 1.00 1 05/31/2017 22:48 WG984594

1,1,2,2-Tetrachloroethane U 0.130 1.00 1 05/31/2017 22:48 WG984594 3 1,1,2-Trichlorotrifluoroethane U 0.303 1.00 1 05/31/2017 22:48 WG984594 Ss Tetrachloroethene U 0.372 1.00 1 05/31/2017 22:48 WG984594 4 Toluene U 0.412 1.00 1 05/31/2017 22:48 WG984594 Cn 1,2,3-Trichlorobenzene U 0.230 1.00 1 05/31/2017 22:48 WG984594

1,2,4-Trichlorobenzene U 0.355 1.00 1 05/31/2017 22:48 WG984594 5 1,1,1-Trichloroethane U 0.319 1.00 1 05/31/2017 22:48 WG984594 Sr 1,1,2-Trichloroethane U 0.383 1.00 1 05/31/2017 22:48 WG984594 6 Trichloroethene U 0.398 1.00 1 05/31/2017 22:48 WG984594 Qc Trichlorofluoromethane U 1.20 5.00 1 05/31/2017 22:48 WG984594

1,2,3-Trichloropropane U 0.807 2.50 1 05/31/2017 22:48 WG984594 7 1,2,4-Trimethylbenzene U 0.373 1.00 1 05/31/2017 22:48 WG984594 Gl 1,2,3-Trimethylbenzene U 0.321 1.00 1 05/31/2017 22:48 WG984594 8 1,3,5-Trimethylbenzene U 0.387 1.00 1 05/31/2017 22:48 WG984594 Al Vinyl chloride U 0.259 1.00 1 05/31/2017 22:48 WG984594

Xylenes, Total U 1.06 3.00 1 05/31/2017 22:48 WG984594 9 (S) Toluene-d8 99.6 80.0-120 05/31/2017 22:48 WG984594 Sc (S) Dibromofluoromethane 88.6 76.0-123 05/31/2017 22:48 WG984594 (S) 4-Bromofluorobenzene 104 80.0-120 05/31/2017 22:48 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 8 of 32 MW-15 SAMPLE RESULTS - 03 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 07:55 L911004

Volatile Organic Compounds (GC) by Method NWTPHGX 1 Cp Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 2 Gasoline Range Tc Organics-NWTPH U 31.6 100 1 05/26/2017 21:45 WG982900 (S) a,a,a-Trifluorotoluene(FID) 95.8 77.0-122 05/26/2017 21:45 WG982900 3 Ss Volatile Organic Compounds (GC/MS) by Method 8260B 4 Result Qualifier MDL RDL Dilution Analysis Batch Cn Analyte ug/l ug/l ug/l date / time 5 Acetone U 10.0 50.0 1 05/31/2017 23:05 WG984594 Sr Acrolein U J4 8.87 50.0 1 05/31/2017 23:05 WG984594 Acrylonitrile U 1.87 10.0 1 05/31/2017 23:05 WG984594 6 Benzene U 0.331 1.00 1 05/31/2017 23:05 WG984594 Qc Bromobenzene U 0.352 1.00 1 05/31/2017 23:05 WG984594 7 Bromodichloromethane U 0.380 1.00 1 05/31/2017 23:05 WG984594 Gl Bromoform U 0.469 1.00 1 05/31/2017 23:05 WG984594 Bromomethane U 0.866 5.00 1 05/31/2017 23:05 WG984594 8 n-Butylbenzene U 0.361 1.00 1 05/31/2017 23:05 WG984594 Al sec-Butylbenzene U 0.365 1.00 1 05/31/2017 23:05 WG984594 9 tert-Butylbenzene U 0.399 1.00 1 05/31/2017 23:05 WG984594 Sc Carbon disulfide U 0.275 1.00 1 05/31/2017 23:05 WG984594 Carbon tetrachloride U 0.379 1.00 1 05/31/2017 23:05 WG984594 Chlorobenzene U 0.348 1.00 1 05/31/2017 23:05 WG984594 Chlorodibromomethane U 0.327 1.00 1 05/31/2017 23:05 WG984594 Chloroethane U J3 0.453 5.00 1 05/31/2017 23:05 WG984594 Chloroform U 0.324 5.00 1 05/31/2017 23:05 WG984594 Chloromethane U 0.276 2.50 1 05/31/2017 23:05 WG984594 2-Chlorotoluene U 0.375 1.00 1 05/31/2017 23:05 WG984594 4-Chlorotoluene U 0.351 1.00 1 05/31/2017 23:05 WG984594 1,2-Dibromo-3-Chloropropane U 1.33 5.00 1 05/31/2017 23:05 WG984594 1,2-Dibromoethane U 0.381 1.00 1 05/31/2017 23:05 WG984594 Dibromomethane U 0.346 1.00 1 05/31/2017 23:05 WG984594 1,2-Dichlorobenzene U 0.349 1.00 1 05/31/2017 23:05 WG984594 1,3-Dichlorobenzene U 0.220 1.00 1 05/31/2017 23:05 WG984594 1,4-Dichlorobenzene U 0.274 1.00 1 05/31/2017 23:05 WG984594 Dichlorodifluoromethane U 0.551 5.00 1 05/31/2017 23:05 WG984594 1,1-Dichloroethane U 0.259 1.00 1 05/31/2017 23:05 WG984594 1,2-Dichloroethane U 0.361 1.00 1 05/31/2017 23:05 WG984594 1,1-Dichloroethene U 0.398 1.00 1 05/31/2017 23:05 WG984594 cis-1,2-Dichloroethene U 0.260 1.00 1 05/31/2017 23:05 WG984594 trans-1,2-Dichloroethene U 0.396 1.00 1 05/31/2017 23:05 WG984594 1,2-Dichloropropane U 0.306 1.00 1 05/31/2017 23:05 WG984594 1,1-Dichloropropene U 0.352 1.00 1 05/31/2017 23:05 WG984594 1,3-Dichloropropane U 0.366 1.00 1 05/31/2017 23:05 WG984594 cis-1,3-Dichloropropene U 0.418 1.00 1 05/31/2017 23:05 WG984594 trans-1,3-Dichloropropene U 0.419 1.00 1 05/31/2017 23:05 WG984594 2,2-Dichloropropane U 0.321 1.00 1 05/31/2017 23:05 WG984594 Di-isopropyl ether U 0.320 1.00 1 05/31/2017 23:05 WG984594 Ethylbenzene U 0.384 1.00 1 05/31/2017 23:05 WG984594 Hexachloro-1,3-butadiene U 0.256 1.00 1 05/31/2017 23:05 WG984594 Isopropylbenzene U 0.326 1.00 1 05/31/2017 23:05 WG984594 p-Isopropyltoluene U 0.350 1.00 1 05/31/2017 23:05 WG984594 2-Butanone (MEK) U 3.93 10.0 1 05/31/2017 23:05 WG984594 Methylene Chloride U 1.00 5.00 1 05/31/2017 23:05 WG984594 4-Methyl-2-pentanone (MIBK) U 2.14 10.0 1 05/31/2017 23:05 WG984594 Methyl tert-butyl ether U 0.367 1.00 1 05/31/2017 23:05 WG984594 Naphthalene U 1.00 5.00 1 05/31/2017 23:05 WG984594 n-Propylbenzene U 0.349 1.00 1 05/31/2017 23:05 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 9 of 32 MW-15 SAMPLE RESULTS - 03 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 07:55 L911004 Volatile Organic Compounds (GC/MS) by Method 8260B 1 Result Qualifier MDL RDL Dilution Analysis Batch Cp Analyte ug/l ug/l ug/l date / time 2 Styrene U 0.307 1.00 1 05/31/2017 23:05 WG984594 Tc 1,1,1,2-Tetrachloroethane U 0.385 1.00 1 05/31/2017 23:05 WG984594

1,1,2,2-Tetrachloroethane U 0.130 1.00 1 05/31/2017 23:05 WG984594 3 1,1,2-Trichlorotrifluoroethane U 0.303 1.00 1 05/31/2017 23:05 WG984594 Ss Tetrachloroethene U 0.372 1.00 1 05/31/2017 23:05 WG984594 4 Toluene U 0.412 1.00 1 05/31/2017 23:05 WG984594 Cn 1,2,3-Trichlorobenzene U 0.230 1.00 1 05/31/2017 23:05 WG984594

1,2,4-Trichlorobenzene U 0.355 1.00 1 05/31/2017 23:05 WG984594 5 1,1,1-Trichloroethane U 0.319 1.00 1 05/31/2017 23:05 WG984594 Sr 1,1,2-Trichloroethane U 0.383 1.00 1 05/31/2017 23:05 WG984594 6 Trichloroethene U 0.398 1.00 1 05/31/2017 23:05 WG984594 Qc Trichlorofluoromethane U 1.20 5.00 1 05/31/2017 23:05 WG984594

1,2,3-Trichloropropane U 0.807 2.50 1 05/31/2017 23:05 WG984594 7 1,2,4-Trimethylbenzene U 0.373 1.00 1 05/31/2017 23:05 WG984594 Gl 1,2,3-Trimethylbenzene U 0.321 1.00 1 05/31/2017 23:05 WG984594 8 1,3,5-Trimethylbenzene U 0.387 1.00 1 05/31/2017 23:05 WG984594 Al Vinyl chloride U 0.259 1.00 1 05/31/2017 23:05 WG984594

Xylenes, Total U 1.06 3.00 1 05/31/2017 23:05 WG984594 9 (S) Toluene-d8 99.5 80.0-120 05/31/2017 23:05 WG984594 Sc (S) Dibromofluoromethane 90.7 76.0-123 05/31/2017 23:05 WG984594 (S) 4-Bromofluorobenzene 104 80.0-120 05/31/2017 23:05 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 10 of 32 MW-16 SAMPLE RESULTS - 04 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 07:30 L911004

Volatile Organic Compounds (GC) by Method NWTPHGX 1 Cp Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 2 Gasoline Range Tc Organics-NWTPH U 31.6 100 1 05/26/2017 22:07 WG982900 (S) a,a,a-Trifluorotoluene(FID) 95.2 77.0-122 05/26/2017 22:07 WG982900 3 Ss Volatile Organic Compounds (GC/MS) by Method 8260B 4 Result Qualifier MDL RDL Dilution Analysis Batch Cn Analyte ug/l ug/l ug/l date / time 5 Acetone U 10.0 50.0 1 05/31/2017 23:22 WG984594 Sr Acrolein U J4 8.87 50.0 1 05/31/2017 23:22 WG984594 Acrylonitrile U 1.87 10.0 1 05/31/2017 23:22 WG984594 6 Benzene U 0.331 1.00 1 05/31/2017 23:22 WG984594 Qc Bromobenzene U 0.352 1.00 1 05/31/2017 23:22 WG984594 7 Bromodichloromethane U 0.380 1.00 1 05/31/2017 23:22 WG984594 Gl Bromoform U 0.469 1.00 1 05/31/2017 23:22 WG984594 Bromomethane U 0.866 5.00 1 05/31/2017 23:22 WG984594 8 n-Butylbenzene U 0.361 1.00 1 05/31/2017 23:22 WG984594 Al sec-Butylbenzene U 0.365 1.00 1 05/31/2017 23:22 WG984594 9 tert-Butylbenzene U 0.399 1.00 1 05/31/2017 23:22 WG984594 Sc Carbon disulfide U 0.275 1.00 1 05/31/2017 23:22 WG984594 Carbon tetrachloride U 0.379 1.00 1 05/31/2017 23:22 WG984594 Chlorobenzene U 0.348 1.00 1 05/31/2017 23:22 WG984594 Chlorodibromomethane U 0.327 1.00 1 05/31/2017 23:22 WG984594 Chloroethane U J3 0.453 5.00 1 05/31/2017 23:22 WG984594 Chloroform U 0.324 5.00 1 05/31/2017 23:22 WG984594 Chloromethane U 0.276 2.50 1 05/31/2017 23:22 WG984594 2-Chlorotoluene U 0.375 1.00 1 05/31/2017 23:22 WG984594 4-Chlorotoluene U 0.351 1.00 1 05/31/2017 23:22 WG984594 1,2-Dibromo-3-Chloropropane U 1.33 5.00 1 05/31/2017 23:22 WG984594 1,2-Dibromoethane U 0.381 1.00 1 05/31/2017 23:22 WG984594 Dibromomethane U 0.346 1.00 1 05/31/2017 23:22 WG984594 1,2-Dichlorobenzene U 0.349 1.00 1 05/31/2017 23:22 WG984594 1,3-Dichlorobenzene U 0.220 1.00 1 05/31/2017 23:22 WG984594 1,4-Dichlorobenzene U 0.274 1.00 1 05/31/2017 23:22 WG984594 Dichlorodifluoromethane U 0.551 5.00 1 05/31/2017 23:22 WG984594 1,1-Dichloroethane U 0.259 1.00 1 05/31/2017 23:22 WG984594 1,2-Dichloroethane U 0.361 1.00 1 05/31/2017 23:22 WG984594 1,1-Dichloroethene U 0.398 1.00 1 05/31/2017 23:22 WG984594 cis-1,2-Dichloroethene U 0.260 1.00 1 05/31/2017 23:22 WG984594 trans-1,2-Dichloroethene U 0.396 1.00 1 05/31/2017 23:22 WG984594 1,2-Dichloropropane U 0.306 1.00 1 05/31/2017 23:22 WG984594 1,1-Dichloropropene U 0.352 1.00 1 05/31/2017 23:22 WG984594 1,3-Dichloropropane U 0.366 1.00 1 05/31/2017 23:22 WG984594 cis-1,3-Dichloropropene U 0.418 1.00 1 05/31/2017 23:22 WG984594 trans-1,3-Dichloropropene U 0.419 1.00 1 05/31/2017 23:22 WG984594 2,2-Dichloropropane U 0.321 1.00 1 05/31/2017 23:22 WG984594 Di-isopropyl ether U 0.320 1.00 1 05/31/2017 23:22 WG984594 Ethylbenzene U 0.384 1.00 1 05/31/2017 23:22 WG984594 Hexachloro-1,3-butadiene U 0.256 1.00 1 05/31/2017 23:22 WG984594 Isopropylbenzene U 0.326 1.00 1 05/31/2017 23:22 WG984594 p-Isopropyltoluene U 0.350 1.00 1 05/31/2017 23:22 WG984594 2-Butanone (MEK) U 3.93 10.0 1 05/31/2017 23:22 WG984594 Methylene Chloride U 1.00 5.00 1 05/31/2017 23:22 WG984594 4-Methyl-2-pentanone (MIBK) U 2.14 10.0 1 05/31/2017 23:22 WG984594 Methyl tert-butyl ether U 0.367 1.00 1 05/31/2017 23:22 WG984594 Naphthalene U 1.00 5.00 1 05/31/2017 23:22 WG984594 n-Propylbenzene U 0.349 1.00 1 05/31/2017 23:22 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 11 of 32 MW-16 SAMPLE RESULTS - 04 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 07:30 L911004 Volatile Organic Compounds (GC/MS) by Method 8260B 1 Result Qualifier MDL RDL Dilution Analysis Batch Cp Analyte ug/l ug/l ug/l date / time 2 Styrene U 0.307 1.00 1 05/31/2017 23:22 WG984594 Tc 1,1,1,2-Tetrachloroethane U 0.385 1.00 1 05/31/2017 23:22 WG984594

1,1,2,2-Tetrachloroethane U 0.130 1.00 1 05/31/2017 23:22 WG984594 3 1,1,2-Trichlorotrifluoroethane U 0.303 1.00 1 05/31/2017 23:22 WG984594 Ss Tetrachloroethene 0.387 J 0.372 1.00 1 05/31/2017 23:22 WG984594 4 Toluene U 0.412 1.00 1 05/31/2017 23:22 WG984594 Cn 1,2,3-Trichlorobenzene U 0.230 1.00 1 05/31/2017 23:22 WG984594

1,2,4-Trichlorobenzene U 0.355 1.00 1 05/31/2017 23:22 WG984594 5 1,1,1-Trichloroethane U 0.319 1.00 1 05/31/2017 23:22 WG984594 Sr 1,1,2-Trichloroethane U 0.383 1.00 1 05/31/2017 23:22 WG984594 6 Trichloroethene U 0.398 1.00 1 05/31/2017 23:22 WG984594 Qc Trichlorofluoromethane U 1.20 5.00 1 05/31/2017 23:22 WG984594

1,2,3-Trichloropropane U 0.807 2.50 1 05/31/2017 23:22 WG984594 7 1,2,4-Trimethylbenzene U 0.373 1.00 1 05/31/2017 23:22 WG984594 Gl 1,2,3-Trimethylbenzene U 0.321 1.00 1 05/31/2017 23:22 WG984594 8 1,3,5-Trimethylbenzene U 0.387 1.00 1 05/31/2017 23:22 WG984594 Al Vinyl chloride U 0.259 1.00 1 05/31/2017 23:22 WG984594

Xylenes, Total U 1.06 3.00 1 05/31/2017 23:22 WG984594 9 (S) Toluene-d8 102 80.0-120 05/31/2017 23:22 WG984594 Sc (S) Dibromofluoromethane 89.2 76.0-123 05/31/2017 23:22 WG984594 (S) 4-Bromofluorobenzene 105 80.0-120 05/31/2017 23:22 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 12 of 32 MW-17R SAMPLE RESULTS - 05 ONE LAB. NATIONWIDE. Collected date/time: 05/17/17 14:55 L911004

Volatile Organic Compounds (GC) by Method NWTPHGX 1 Cp Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 2 Gasoline Range Tc Organics-NWTPH U 31.6 100 1 05/26/2017 16:09 WG983163 (S) a,a,a-Trifluorotoluene(FID) 109 77.0-122 05/26/2017 16:09 WG983163 3 Ss Volatile Organic Compounds (GC/MS) by Method 8260B 4 Result Qualifier MDL RDL Dilution Analysis Batch Cn Analyte ug/l ug/l ug/l date / time 5 Acetone U J4 10.0 50.0 1 05/30/2017 13:16 WG984163 Sr Acrolein U J4 8.87 50.0 1 05/30/2017 13:16 WG984163 Acrylonitrile U 1.87 10.0 1 05/30/2017 13:16 WG984163 6 Benzene U 0.331 1.00 1 05/31/2017 15:51 WG984163 Qc Bromobenzene U 0.352 1.00 1 05/30/2017 13:16 WG984163 7 Bromodichloromethane U 0.380 1.00 1 05/30/2017 13:16 WG984163 Gl Bromoform U 0.469 1.00 1 05/30/2017 13:16 WG984163 Bromomethane U 0.866 5.00 1 05/30/2017 13:16 WG984163 8 n-Butylbenzene U 0.361 1.00 1 05/30/2017 13:16 WG984163 Al sec-Butylbenzene U 0.365 1.00 1 05/30/2017 13:16 WG984163 9 tert-Butylbenzene U 0.399 1.00 1 05/30/2017 13:16 WG984163 Sc Carbon disulfide U 0.275 1.00 1 05/30/2017 13:16 WG984163 Carbon tetrachloride U 0.379 1.00 1 05/30/2017 13:16 WG984163 Chlorobenzene U 0.348 1.00 1 05/30/2017 13:16 WG984163 Chlorodibromomethane U 0.327 1.00 1 05/30/2017 13:16 WG984163 Chloroethane U 0.453 5.00 1 05/30/2017 13:16 WG984163 Chloroform U 0.324 5.00 1 05/30/2017 13:16 WG984163 Chloromethane U 0.276 2.50 1 05/30/2017 13:16 WG984163 2-Chlorotoluene U 0.375 1.00 1 05/30/2017 13:16 WG984163 4-Chlorotoluene U 0.351 1.00 1 05/30/2017 13:16 WG984163 1,2-Dibromo-3-Chloropropane U 1.33 5.00 1 05/30/2017 13:16 WG984163 1,2-Dibromoethane U 0.381 1.00 1 05/30/2017 13:16 WG984163 Dibromomethane U 0.346 1.00 1 05/30/2017 13:16 WG984163 1,2-Dichlorobenzene U 0.349 1.00 1 05/30/2017 13:16 WG984163 1,3-Dichlorobenzene U 0.220 1.00 1 05/30/2017 13:16 WG984163 1,4-Dichlorobenzene U 0.274 1.00 1 05/30/2017 13:16 WG984163 Dichlorodifluoromethane U 0.551 5.00 1 05/30/2017 13:16 WG984163 1,1-Dichloroethane U 0.259 1.00 1 05/30/2017 13:16 WG984163 1,2-Dichloroethane U 0.361 1.00 1 05/30/2017 13:16 WG984163 1,1-Dichloroethene U 0.398 1.00 1 05/30/2017 13:16 WG984163 cis-1,2-Dichloroethene U 0.260 1.00 1 05/30/2017 13:16 WG984163 trans-1,2-Dichloroethene U 0.396 1.00 1 05/30/2017 13:16 WG984163 1,2-Dichloropropane U 0.306 1.00 1 05/30/2017 13:16 WG984163 1,1-Dichloropropene U 0.352 1.00 1 05/30/2017 13:16 WG984163 1,3-Dichloropropane U 0.366 1.00 1 05/30/2017 13:16 WG984163 cis-1,3-Dichloropropene U 0.418 1.00 1 05/30/2017 13:16 WG984163 trans-1,3-Dichloropropene U 0.419 1.00 1 05/30/2017 13:16 WG984163 2,2-Dichloropropane U 0.321 1.00 1 05/30/2017 13:16 WG984163 Di-isopropyl ether U 0.320 1.00 1 05/30/2017 13:16 WG984163 Ethylbenzene U 0.384 1.00 1 05/30/2017 13:16 WG984163 Hexachloro-1,3-butadiene U 0.256 1.00 1 05/30/2017 13:16 WG984163 Isopropylbenzene U 0.326 1.00 1 05/30/2017 13:16 WG984163 p-Isopropyltoluene U 0.350 1.00 1 05/30/2017 13:16 WG984163 2-Butanone (MEK) U 3.93 10.0 1 05/30/2017 13:16 WG984163 Methylene Chloride U 1.00 5.00 1 05/30/2017 13:16 WG984163 4-Methyl-2-pentanone (MIBK) U 2.14 10.0 1 05/30/2017 13:16 WG984163 Methyl tert-butyl ether U 0.367 1.00 1 05/30/2017 13:16 WG984163 Naphthalene U J3 1.00 5.00 1 05/31/2017 15:51 WG984163 n-Propylbenzene U 0.349 1.00 1 05/30/2017 13:16 WG984163

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 13 of 32 MW-17R SAMPLE RESULTS - 05 ONE LAB. NATIONWIDE. Collected date/time: 05/17/17 14:55 L911004 Volatile Organic Compounds (GC/MS) by Method 8260B 1 Result Qualifier MDL RDL Dilution Analysis Batch Cp Analyte ug/l ug/l ug/l date / time 2 Styrene U 0.307 1.00 1 05/30/2017 13:16 WG984163 Tc 1,1,1,2-Tetrachloroethane U 0.385 1.00 1 05/30/2017 13:16 WG984163

1,1,2,2-Tetrachloroethane U 0.130 1.00 1 05/30/2017 13:16 WG984163 3 1,1,2-Trichlorotrifluoroethane U 0.303 1.00 1 05/30/2017 13:16 WG984163 Ss Tetrachloroethene U 0.372 1.00 1 05/30/2017 13:16 WG984163 4 Toluene U 0.412 1.00 1 05/31/2017 15:51 WG984163 Cn 1,2,3-Trichlorobenzene U J3 0.230 1.00 1 05/30/2017 13:16 WG984163

1,2,4-Trichlorobenzene U 0.355 1.00 1 05/30/2017 13:16 WG984163 5 1,1,1-Trichloroethane U 0.319 1.00 1 05/30/2017 13:16 WG984163 Sr 1,1,2-Trichloroethane U 0.383 1.00 1 05/30/2017 13:16 WG984163 6 Trichloroethene U 0.398 1.00 1 05/30/2017 13:16 WG984163 Qc Trichlorofluoromethane U 1.20 5.00 1 05/30/2017 13:16 WG984163

1,2,3-Trichloropropane U 0.807 2.50 1 05/30/2017 13:16 WG984163 7 1,2,4-Trimethylbenzene U 0.373 1.00 1 05/31/2017 15:51 WG984163 Gl 1,2,3-Trimethylbenzene 0.351 J 0.321 1.00 1 05/30/2017 13:16 WG984163 8 1,3,5-Trimethylbenzene U 0.387 1.00 1 05/30/2017 13:16 WG984163 Al Vinyl chloride U 0.259 1.00 1 05/30/2017 13:16 WG984163

Xylenes, Total U 1.06 3.00 1 05/31/2017 15:51 WG984163 9 (S) Toluene-d8 91.4 80.0-120 05/30/2017 13:16 WG984163 Sc (S) Toluene-d8 106 80.0-120 05/31/2017 15:51 WG984163 (S) Dibromofluoromethane 85.2 76.0-123 05/30/2017 13:16 WG984163 (S) Dibromofluoromethane 107 76.0-123 05/31/2017 15:51 WG984163 (S) 4-Bromofluorobenzene 93.8 80.0-120 05/31/2017 15:51 WG984163 (S) 4-Bromofluorobenzene 96.4 80.0-120 05/30/2017 13:16 WG984163

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 14 of 32 MW-18 SAMPLE RESULTS - 06 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 08:45 L911004

Volatile Organic Compounds (GC) by Method NWTPHGX 1 Cp Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 2 Gasoline Range Tc Organics-NWTPH U 31.6 100 1 05/26/2017 17:44 WG983163 (S) a,a,a-Trifluorotoluene(FID) 109 77.0-122 05/26/2017 17:44 WG983163 3 Ss Volatile Organic Compounds (GC/MS) by Method 8260B 4 Result Qualifier MDL RDL Dilution Analysis Batch Cn Analyte ug/l ug/l ug/l date / time 5 Acetone U 10.0 50.0 1 05/31/2017 23:39 WG984594 Sr Acrolein U J4 8.87 50.0 1 05/31/2017 23:39 WG984594 Acrylonitrile U 1.87 10.0 1 05/31/2017 23:39 WG984594 6 Benzene 0.859 J 0.331 1.00 1 05/31/2017 23:39 WG984594 Qc Bromobenzene U 0.352 1.00 1 05/31/2017 23:39 WG984594 7 Bromodichloromethane U 0.380 1.00 1 05/31/2017 23:39 WG984594 Gl Bromoform U 0.469 1.00 1 05/31/2017 23:39 WG984594 Bromomethane U 0.866 5.00 1 05/31/2017 23:39 WG984594 8 n-Butylbenzene U 0.361 1.00 1 05/31/2017 23:39 WG984594 Al sec-Butylbenzene U 0.365 1.00 1 05/31/2017 23:39 WG984594 9 tert-Butylbenzene U 0.399 1.00 1 05/31/2017 23:39 WG984594 Sc Carbon disulfide U 0.275 1.00 1 05/31/2017 23:39 WG984594 Carbon tetrachloride U 0.379 1.00 1 05/31/2017 23:39 WG984594 Chlorobenzene U 0.348 1.00 1 05/31/2017 23:39 WG984594 Chlorodibromomethane U 0.327 1.00 1 05/31/2017 23:39 WG984594 Chloroethane U J3 0.453 5.00 1 05/31/2017 23:39 WG984594 Chloroform U 0.324 5.00 1 05/31/2017 23:39 WG984594 Chloromethane U 0.276 2.50 1 05/31/2017 23:39 WG984594 2-Chlorotoluene U 0.375 1.00 1 05/31/2017 23:39 WG984594 4-Chlorotoluene U 0.351 1.00 1 05/31/2017 23:39 WG984594 1,2-Dibromo-3-Chloropropane U 1.33 5.00 1 05/31/2017 23:39 WG984594 1,2-Dibromoethane U 0.381 1.00 1 05/31/2017 23:39 WG984594 Dibromomethane U 0.346 1.00 1 05/31/2017 23:39 WG984594 1,2-Dichlorobenzene U 0.349 1.00 1 05/31/2017 23:39 WG984594 1,3-Dichlorobenzene U 0.220 1.00 1 05/31/2017 23:39 WG984594 1,4-Dichlorobenzene U 0.274 1.00 1 05/31/2017 23:39 WG984594 Dichlorodifluoromethane U 0.551 5.00 1 05/31/2017 23:39 WG984594 1,1-Dichloroethane U 0.259 1.00 1 05/31/2017 23:39 WG984594 1,2-Dichloroethane 0.700 J 0.361 1.00 1 05/31/2017 23:39 WG984594 1,1-Dichloroethene U 0.398 1.00 1 05/31/2017 23:39 WG984594 cis-1,2-Dichloroethene U 0.260 1.00 1 05/31/2017 23:39 WG984594 trans-1,2-Dichloroethene U 0.396 1.00 1 05/31/2017 23:39 WG984594 1,2-Dichloropropane U 0.306 1.00 1 05/31/2017 23:39 WG984594 1,1-Dichloropropene U 0.352 1.00 1 05/31/2017 23:39 WG984594 1,3-Dichloropropane U 0.366 1.00 1 05/31/2017 23:39 WG984594 cis-1,3-Dichloropropene U 0.418 1.00 1 05/31/2017 23:39 WG984594 trans-1,3-Dichloropropene U 0.419 1.00 1 05/31/2017 23:39 WG984594 2,2-Dichloropropane U 0.321 1.00 1 05/31/2017 23:39 WG984594 Di-isopropyl ether U 0.320 1.00 1 05/31/2017 23:39 WG984594 Ethylbenzene U 0.384 1.00 1 05/31/2017 23:39 WG984594 Hexachloro-1,3-butadiene U 0.256 1.00 1 05/31/2017 23:39 WG984594 Isopropylbenzene U 0.326 1.00 1 05/31/2017 23:39 WG984594 p-Isopropyltoluene U 0.350 1.00 1 05/31/2017 23:39 WG984594 2-Butanone (MEK) U 3.93 10.0 1 05/31/2017 23:39 WG984594 Methylene Chloride U 1.00 5.00 1 05/31/2017 23:39 WG984594 4-Methyl-2-pentanone (MIBK) U 2.14 10.0 1 05/31/2017 23:39 WG984594 Methyl tert-butyl ether 7.60 0.367 1.00 1 05/31/2017 23:39 WG984594 Naphthalene U 1.00 5.00 1 05/31/2017 23:39 WG984594 n-Propylbenzene U 0.349 1.00 1 05/31/2017 23:39 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 15 of 32 MW-18 SAMPLE RESULTS - 06 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 08:45 L911004 Volatile Organic Compounds (GC/MS) by Method 8260B 1 Result Qualifier MDL RDL Dilution Analysis Batch Cp Analyte ug/l ug/l ug/l date / time 2 Styrene U 0.307 1.00 1 05/31/2017 23:39 WG984594 Tc 1,1,1,2-Tetrachloroethane U 0.385 1.00 1 05/31/2017 23:39 WG984594

1,1,2,2-Tetrachloroethane U 0.130 1.00 1 05/31/2017 23:39 WG984594 3 1,1,2-Trichlorotrifluoroethane U 0.303 1.00 1 05/31/2017 23:39 WG984594 Ss Tetrachloroethene U 0.372 1.00 1 05/31/2017 23:39 WG984594 4 Toluene U 0.412 1.00 1 05/31/2017 23:39 WG984594 Cn 1,2,3-Trichlorobenzene U 0.230 1.00 1 05/31/2017 23:39 WG984594

1,2,4-Trichlorobenzene U 0.355 1.00 1 05/31/2017 23:39 WG984594 5 1,1,1-Trichloroethane U 0.319 1.00 1 05/31/2017 23:39 WG984594 Sr 1,1,2-Trichloroethane U 0.383 1.00 1 05/31/2017 23:39 WG984594 6 Trichloroethene U 0.398 1.00 1 05/31/2017 23:39 WG984594 Qc Trichlorofluoromethane U 1.20 5.00 1 05/31/2017 23:39 WG984594

1,2,3-Trichloropropane U 0.807 2.50 1 05/31/2017 23:39 WG984594 7 1,2,4-Trimethylbenzene U 0.373 1.00 1 05/31/2017 23:39 WG984594 Gl 1,2,3-Trimethylbenzene U 0.321 1.00 1 05/31/2017 23:39 WG984594 8 1,3,5-Trimethylbenzene U 0.387 1.00 1 05/31/2017 23:39 WG984594 Al Vinyl chloride U 0.259 1.00 1 05/31/2017 23:39 WG984594

Xylenes, Total U 1.06 3.00 1 05/31/2017 23:39 WG984594 9 (S) Toluene-d8 100 80.0-120 05/31/2017 23:39 WG984594 Sc (S) Dibromofluoromethane 89.2 76.0-123 05/31/2017 23:39 WG984594 (S) 4-Bromofluorobenzene 106 80.0-120 05/31/2017 23:39 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 16 of 32 DUP SAMPLE RESULTS - 07 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 00:00 L911004

Volatile Organic Compounds (GC) by Method NWTPHGX 1 Cp Result Qualifier MDL RDL Dilution Analysis Batch Analyte ug/l ug/l ug/l date / time 2 Gasoline Range Tc Organics-NWTPH 67.1 J 31.6 100 1 05/26/2017 18:08 WG983163 (S) a,a,a-Trifluorotoluene(FID) 111 77.0-122 05/26/2017 18:08 WG983163 3 Ss Volatile Organic Compounds (GC/MS) by Method 8260B 4 Result Qualifier MDL RDL Dilution Analysis Batch Cn Analyte ug/l ug/l ug/l date / time 5 Acetone 14.2 J 10.0 50.0 1 05/31/2017 23:56 WG984594 Sr Acrolein U J4 8.87 50.0 1 05/31/2017 23:56 WG984594 Acrylonitrile U 1.87 10.0 1 05/31/2017 23:56 WG984594 6 Benzene U 0.331 1.00 1 05/31/2017 23:56 WG984594 Qc Bromobenzene U 0.352 1.00 1 05/31/2017 23:56 WG984594 7 Bromodichloromethane U 0.380 1.00 1 05/31/2017 23:56 WG984594 Gl Bromoform U 0.469 1.00 1 05/31/2017 23:56 WG984594 Bromomethane U 0.866 5.00 1 05/31/2017 23:56 WG984594 8 n-Butylbenzene U 0.361 1.00 1 05/31/2017 23:56 WG984594 Al sec-Butylbenzene U 0.365 1.00 1 05/31/2017 23:56 WG984594 9 tert-Butylbenzene U 0.399 1.00 1 05/31/2017 23:56 WG984594 Sc Carbon disulfide U 0.275 1.00 1 05/31/2017 23:56 WG984594 Carbon tetrachloride U 0.379 1.00 1 05/31/2017 23:56 WG984594 Chlorobenzene U 0.348 1.00 1 05/31/2017 23:56 WG984594 Chlorodibromomethane U 0.327 1.00 1 05/31/2017 23:56 WG984594 Chloroethane U J3 0.453 5.00 1 05/31/2017 23:56 WG984594 Chloroform U 0.324 5.00 1 05/31/2017 23:56 WG984594 Chloromethane U 0.276 2.50 1 05/31/2017 23:56 WG984594 2-Chlorotoluene U 0.375 1.00 1 05/31/2017 23:56 WG984594 4-Chlorotoluene U 0.351 1.00 1 05/31/2017 23:56 WG984594 1,2-Dibromo-3-Chloropropane U 1.33 5.00 1 05/31/2017 23:56 WG984594 1,2-Dibromoethane U 0.381 1.00 1 05/31/2017 23:56 WG984594 Dibromomethane U 0.346 1.00 1 05/31/2017 23:56 WG984594 1,2-Dichlorobenzene U 0.349 1.00 1 05/31/2017 23:56 WG984594 1,3-Dichlorobenzene U 0.220 1.00 1 05/31/2017 23:56 WG984594 1,4-Dichlorobenzene U 0.274 1.00 1 05/31/2017 23:56 WG984594 Dichlorodifluoromethane U 0.551 5.00 1 05/31/2017 23:56 WG984594 1,1-Dichloroethane U 0.259 1.00 1 05/31/2017 23:56 WG984594 1,2-Dichloroethane U 0.361 1.00 1 05/31/2017 23:56 WG984594 1,1-Dichloroethene U 0.398 1.00 1 05/31/2017 23:56 WG984594 cis-1,2-Dichloroethene U 0.260 1.00 1 05/31/2017 23:56 WG984594 trans-1,2-Dichloroethene U 0.396 1.00 1 05/31/2017 23:56 WG984594 1,2-Dichloropropane U 0.306 1.00 1 05/31/2017 23:56 WG984594 1,1-Dichloropropene U 0.352 1.00 1 05/31/2017 23:56 WG984594 1,3-Dichloropropane U 0.366 1.00 1 05/31/2017 23:56 WG984594 cis-1,3-Dichloropropene U 0.418 1.00 1 05/31/2017 23:56 WG984594 trans-1,3-Dichloropropene U 0.419 1.00 1 05/31/2017 23:56 WG984594 2,2-Dichloropropane U 0.321 1.00 1 05/31/2017 23:56 WG984594 Di-isopropyl ether U 0.320 1.00 1 05/31/2017 23:56 WG984594 Ethylbenzene U 0.384 1.00 1 05/31/2017 23:56 WG984594 Hexachloro-1,3-butadiene U 0.256 1.00 1 05/31/2017 23:56 WG984594 Isopropylbenzene U 0.326 1.00 1 05/31/2017 23:56 WG984594 p-Isopropyltoluene U 0.350 1.00 1 05/31/2017 23:56 WG984594 2-Butanone (MEK) U 3.93 10.0 1 05/31/2017 23:56 WG984594 Methylene Chloride U 1.00 5.00 1 05/31/2017 23:56 WG984594 4-Methyl-2-pentanone (MIBK) U 2.14 10.0 1 05/31/2017 23:56 WG984594 Methyl tert-butyl ether U 0.367 1.00 1 05/31/2017 23:56 WG984594 Naphthalene U 1.00 5.00 1 05/31/2017 23:56 WG984594 n-Propylbenzene U 0.349 1.00 1 05/31/2017 23:56 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 17 of 32 DUP SAMPLE RESULTS - 07 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 00:00 L911004 Volatile Organic Compounds (GC/MS) by Method 8260B 1 Result Qualifier MDL RDL Dilution Analysis Batch Cp Analyte ug/l ug/l ug/l date / time 2 Styrene U 0.307 1.00 1 05/31/2017 23:56 WG984594 Tc 1,1,1,2-Tetrachloroethane U 0.385 1.00 1 05/31/2017 23:56 WG984594

1,1,2,2-Tetrachloroethane U 0.130 1.00 1 05/31/2017 23:56 WG984594 3 1,1,2-Trichlorotrifluoroethane U 0.303 1.00 1 05/31/2017 23:56 WG984594 Ss Tetrachloroethene U 0.372 1.00 1 05/31/2017 23:56 WG984594 4 Toluene U 0.412 1.00 1 05/31/2017 23:56 WG984594 Cn 1,2,3-Trichlorobenzene U 0.230 1.00 1 05/31/2017 23:56 WG984594

1,2,4-Trichlorobenzene U 0.355 1.00 1 05/31/2017 23:56 WG984594 5 1,1,1-Trichloroethane U 0.319 1.00 1 05/31/2017 23:56 WG984594 Sr 1,1,2-Trichloroethane U 0.383 1.00 1 05/31/2017 23:56 WG984594 6 Trichloroethene U 0.398 1.00 1 05/31/2017 23:56 WG984594 Qc Trichlorofluoromethane U 1.20 5.00 1 05/31/2017 23:56 WG984594

1,2,3-Trichloropropane U 0.807 2.50 1 05/31/2017 23:56 WG984594 7 1,2,4-Trimethylbenzene U 0.373 1.00 1 05/31/2017 23:56 WG984594 Gl 1,2,3-Trimethylbenzene U 0.321 1.00 1 05/31/2017 23:56 WG984594 8 1,3,5-Trimethylbenzene U 0.387 1.00 1 05/31/2017 23:56 WG984594 Al Vinyl chloride U 0.259 1.00 1 05/31/2017 23:56 WG984594

Xylenes, Total U 1.06 3.00 1 05/31/2017 23:56 WG984594 9 (S) Toluene-d8 97.7 80.0-120 05/31/2017 23:56 WG984594 Sc (S) Dibromofluoromethane 88.7 76.0-123 05/31/2017 23:56 WG984594 (S) 4-Bromofluorobenzene 109 80.0-120 05/31/2017 23:56 WG984594

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 18 of 32 WG982900 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC) by Method NWTPHGX L911004-01,02,03,04

Method Blank (MB) 1 Cp (MB) R3221550-5 05/26/17 19:53 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ug/l ug/l ug/l Tc Gasoline Range U 31.6 100 Organics-NWTPH 3 (S) a,a,a-Trifluorotoluene(FID) 94.6 77.0-122 Ss

4 Cn Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)

(LCS) R3221550-3 05/26/17 18:46 • (LCSD) R3221550-4 05/26/17 19:09 5 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Sr Analyte ug/l ug/l ug/l % % % % % 6 Gasoline Range Qc Organics-NWTPH 5500 6190 5770 113 105 72.0-134 7.08 20 (S) a,a,a-Trifluorotoluene(FID) 104 104 77.0-122 7 Gl

L911047-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) 8 Al (OS) L911047-01 05/27/17 03:18 • (MS) R3221550-8 05/27/17 04:24 • (MSD) R3221550-9 05/27/17 04:47

Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits 9 Analyte ug/l ug/l ug/l ug/l % % % % % Sc Gasoline Range Organics-NWTPH 5500 ND 2620 2730 47.7 49.7 1 23.0-159 4.10 20 (S) a,a,a-Trifluorotoluene(FID) 98.2 98.1 77.0-122

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 19 of 32 WG983163 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC) by Method NWTPHGX L911004-05,06,07

Method Blank (MB) 1 Cp (MB) R3221642-3 05/26/17 15:28 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ug/l ug/l ug/l Tc Gasoline Range U 31.6 100 Organics-NWTPH 3 (S) a,a,a-Trifluorotoluene(FID) 109 77.0-122 Ss

4 Cn Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD)

(LCS) R3221642-1 05/26/17 14:16 • (LCSD) R3221642-2 05/26/17 14:40 5 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Sr Analyte ug/l ug/l ug/l % % % % % 6 Gasoline Range Qc Organics-NWTPH 5500 5340 5450 97.1 99.1 72.0-134 2.01 20 (S) a,a,a-Trifluorotoluene(FID) 111 110 77.0-122 7 Gl

L911004-05 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) 8 Al (OS) L911004-05 05/26/17 16:09 • (MS) R3221642-4 05/26/17 16:33 • (MSD) R3221642-5 05/26/17 16:56

Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits 9 Analyte ug/l ug/l ug/l ug/l % % % % % Sc Gasoline Range Organics-NWTPH 5500 U 6570 6690 119 122 1 23.0-159 1.92 20 (S) a,a,a-Trifluorotoluene(FID) 111 112 77.0-122

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 20 of 32 WG984163 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 8260B L911004-05

Method Blank (MB) 1 Cp (MB) R3221850-3 05/30/17 10:58 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ug/l ug/l ug/l Tc Acetone U 10.0 50.0 3 Acrolein U 8.87 50.0 Ss Acrylonitrile U 1.87 10.0

Benzene U 0.331 1.00 4 Bromobenzene U 0.352 1.00 Cn Bromodichloromethane U 0.380 1.00 5 Bromoform U 0.469 1.00 Sr Bromomethane U 0.866 5.00 n-Butylbenzene U 0.361 1.00 6 sec-Butylbenzene U 0.365 1.00 Qc tert-Butylbenzene U 0.399 1.00 7 Carbon disulfide U 0.275 1.00 Gl Carbon tetrachloride U 0.379 1.00

Chlorobenzene U 0.348 1.00 8 Chlorodibromomethane U 0.327 1.00 Al Chloroethane U 0.453 5.00 9 Chloroform U 0.324 5.00 Sc Chloromethane U 0.276 2.50 2-Chlorotoluene U 0.375 1.00 4-Chlorotoluene U 0.351 1.00 1,2-Dibromo-3-Chloropropane U 1.33 5.00 1,2-Dibromoethane U 0.381 1.00 Dibromomethane U 0.346 1.00 1,2-Dichlorobenzene U 0.349 1.00 1,3-Dichlorobenzene U 0.220 1.00 1,4-Dichlorobenzene U 0.274 1.00 Dichlorodifluoromethane U 0.551 5.00 1,1-Dichloroethane U 0.259 1.00 1,2-Dichloroethane U 0.361 1.00 1,1-Dichloroethene U 0.398 1.00 cis-1,2-Dichloroethene U 0.260 1.00 trans-1,2-Dichloroethene U 0.396 1.00 1,2-Dichloropropane U 0.306 1.00 1,1-Dichloropropene U 0.352 1.00 1,3-Dichloropropane U 0.366 1.00 cis-1,3-Dichloropropene U 0.418 1.00 trans-1,3-Dichloropropene U 0.419 1.00 2,2-Dichloropropane U 0.321 1.00 Di-isopropyl ether U 0.320 1.00 Ethylbenzene U 0.384 1.00

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 21 of 32 WG984163 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 8260B L911004-05

Method Blank (MB) 1 Cp (MB) R3221850-3 05/30/17 10:58 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ug/l ug/l ug/l Tc Hexachloro-1,3-butadiene U 0.256 1.00 3 Isopropylbenzene U 0.326 1.00 Ss p-Isopropyltoluene U 0.350 1.00

2-Butanone (MEK) U 3.93 10.0 4 Methylene Chloride U 1.00 5.00 Cn 4-Methyl-2-pentanone (MIBK) U 2.14 10.0 5 Methyl tert-butyl ether U 0.367 1.00 Sr Naphthalene U 1.00 5.00 n-Propylbenzene U 0.349 1.00 6 Styrene U 0.307 1.00 Qc 1,1,1,2-Tetrachloroethane U 0.385 1.00 7 1,1,2,2-Tetrachloroethane U 0.130 1.00 Gl Tetrachloroethene U 0.372 1.00

Toluene U 0.412 1.00 8 1,1,2-Trichlorotrifluoroethane U 0.303 1.00 Al 1,2,3-Trichlorobenzene U 0.230 1.00 9 1,2,4-Trichlorobenzene U 0.355 1.00 Sc 1,1,1-Trichloroethane U 0.319 1.00 1,1,2-Trichloroethane U 0.383 1.00 Trichloroethene U 0.398 1.00 Trichlorofluoromethane U 1.20 5.00 1,2,3-Trichloropropane U 0.807 2.50 1,2,3-Trimethylbenzene U 0.321 1.00 1,2,4-Trimethylbenzene U 0.373 1.00 1,3,5-Trimethylbenzene U 0.387 1.00 Vinyl chloride U 0.259 1.00 Xylenes, Total U 1.06 3.00 (S) Toluene-d8 91.1 80.0-120 (S) Dibromofluoromethane 84.0 76.0-123 (S) 4-Bromofluorobenzene 97.9 80.0-120

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3221850-1 05/30/17 09:58 • (LCSD) R3221850-2 05/30/17 10:13 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l % % % % % Acetone 125 202 173 162 138 10.0-160 J4 15.8 23 Acrolein 125 739 820 591 656 10.0-160 E J4 E J4 10.3 20 Acrylonitrile 125 135 138 108 110 60.0-142 2.22 20

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 22 of 32 WG984163 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 8260B L911004-05

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) 1 Cp (LCS) R3221850-1 05/30/17 09:58 • (LCSD) R3221850-2 05/30/17 10:13 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 2 Analyte ug/l ug/l ug/l % % % % % Tc Benzene 25.0 24.4 25.0 97.7 100 69.0-123 2.31 20 3 Bromobenzene 25.0 24.4 25.0 97.4 100 79.0-120 2.71 20 Ss Bromodichloromethane 25.0 26.8 26.8 107 107 76.0-120 0.0500 20

Bromoform 25.0 26.3 27.2 105 109 67.0-132 3.64 20 4 Bromomethane 25.0 16.4 19.4 65.8 77.5 18.0-160 16.3 20 Cn n-Butylbenzene 25.0 23.7 24.0 94.8 96.2 72.0-126 1.41 20 5 sec-Butylbenzene 25.0 23.6 24.4 94.4 97.6 74.0-121 3.36 20 Sr tert-Butylbenzene 25.0 24.4 25.0 97.5 100 75.0-122 2.59 20

Carbon disulfide 25.0 24.6 25.3 98.6 101 55.0-127 2.42 20 6 Carbon tetrachloride 25.0 26.1 26.8 104 107 63.0-122 2.65 20 Qc Chlorobenzene 25.0 25.0 25.1 99.9 100 79.0-121 0.480 20 7 Chlorodibromomethane 25.0 26.6 27.3 106 109 75.0-125 2.52 20 Gl Chloroethane 25.0 23.1 23.2 92.4 92.9 47.0-152 0.440 20

Chloroform 25.0 25.9 26.1 104 105 72.0-121 0.850 20 8 Chloromethane 25.0 27.1 28.0 108 112 48.0-139 3.37 20 Al 2-Chlorotoluene 25.0 24.8 25.3 99.3 101 74.0-122 1.78 20 9 4-Chlorotoluene 25.0 24.4 24.9 97.6 99.5 79.0-120 1.88 20 Sc 1,2-Dibromo-3-Chloropropane 25.0 21.7 23.4 86.7 93.7 64.0-127 7.77 20 1,2-Dibromoethane 25.0 26.0 26.4 104 105 77.0-123 1.27 20 Dibromomethane 25.0 26.0 26.3 104 105 78.0-120 0.800 20 1,2-Dichlorobenzene 25.0 24.6 25.4 98.5 101 80.0-120 2.94 20 1,3-Dichlorobenzene 25.0 24.0 24.6 96.1 98.2 72.0-123 2.14 20 1,4-Dichlorobenzene 25.0 24.7 25.1 98.8 100 77.0-120 1.55 20 Dichlorodifluoromethane 25.0 27.5 29.1 110 116 49.0-155 5.39 20 1,1-Dichloroethane 25.0 26.0 26.4 104 106 70.0-126 1.69 20 1,2-Dichloroethane 25.0 24.5 25.3 98.1 101 67.0-126 3.21 20 1,1-Dichloroethene 25.0 25.5 26.0 102 104 64.0-129 2.04 20 cis-1,2-Dichloroethene 25.0 25.5 25.9 102 104 73.0-120 1.54 20 trans-1,2-Dichloroethene 25.0 25.8 26.1 103 105 71.0-121 1.24 20 1,2-Dichloropropane 25.0 27.1 27.3 109 109 75.0-125 0.520 20 1,1-Dichloropropene 25.0 26.0 26.3 104 105 71.0-129 1.17 20 1,3-Dichloropropane 25.0 25.4 25.6 101 103 80.0-121 1.13 20 cis-1,3-Dichloropropene 25.0 27.6 27.7 110 111 79.0-123 0.300 20 trans-1,3-Dichloropropene 25.0 27.9 28.1 112 112 74.0-127 0.470 20 2,2-Dichloropropane 25.0 25.8 25.8 103 103 60.0-125 0.120 20 Di-isopropyl ether 25.0 26.9 27.5 108 110 59.0-133 2.26 20 Ethylbenzene 25.0 24.9 25.1 99.5 100 77.0-120 0.900 20 Hexachloro-1,3-butadiene 25.0 19.5 21.4 78.0 85.6 64.0-131 9.21 20 Isopropylbenzene 25.0 24.8 25.3 99.1 101 75.0-120 1.92 20 p-Isopropyltoluene 25.0 24.0 24.7 95.8 98.9 74.0-126 3.20 20

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 23 of 32 WG984163 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 8260B L911004-05

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) 1 Cp (LCS) R3221850-1 05/30/17 09:58 • (LCSD) R3221850-2 05/30/17 10:13 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 2 Analyte ug/l ug/l ug/l % % % % % Tc 2-Butanone (MEK) 125 126 119 101 95.0 37.0-158 5.72 20 3 Methylene Chloride 25.0 26.5 26.9 106 108 66.0-121 1.74 20 Ss 4-Methyl-2-pentanone (MIBK) 125 132 133 106 106 59.0-143 0.650 20

Methyl tert-butyl ether 25.0 25.0 25.5 99.9 102 64.0-123 2.04 20 4 Naphthalene 25.0 18.9 24.9 75.7 99.6 62.0-128 J3 27.3 20 Cn n-Propylbenzene 25.0 24.7 25.2 99.0 101 79.0-120 2.00 20 5 Styrene 25.0 26.4 27.0 106 108 78.0-124 2.00 20 Sr 1,1,1,2-Tetrachloroethane 25.0 26.2 26.8 105 107 75.0-122 2.38 20

1,1,2,2-Tetrachloroethane 25.0 25.7 26.7 103 107 71.0-122 3.82 20 6 Tetrachloroethene 25.0 24.2 24.9 96.6 99.7 70.0-127 3.12 20 Qc Toluene 25.0 24.9 24.8 99.6 99.2 77.0-120 0.360 20 7 1,1,2-Trichlorotrifluoroethane 25.0 26.7 27.7 107 111 61.0-136 3.77 20 Gl 1,2,3-Trichlorobenzene 25.0 18.5 25.6 74.0 102 61.0-133 J3 32.0 20

1,2,4-Trichlorobenzene 25.0 20.6 23.3 82.4 93.2 69.0-129 12.3 20 8 1,1,1-Trichloroethane 25.0 26.1 26.6 104 106 68.0-122 1.87 20 Al 1,1,2-Trichloroethane 25.0 25.7 26.3 103 105 78.0-120 2.23 20 9 Trichloroethene 25.0 25.2 25.3 101 101 78.0-120 0.400 20 Sc Trichlorofluoromethane 25.0 28.0 28.7 112 115 56.0-137 2.59 20 1,2,3-Trichloropropane 25.0 25.9 26.7 104 107 72.0-124 3.12 20 1,2,3-Trimethylbenzene 25.0 25.4 25.8 102 103 75.0-120 1.67 20 1,2,4-Trimethylbenzene 25.0 24.8 25.4 99.1 101 75.0-120 2.38 20 1,3,5-Trimethylbenzene 25.0 24.7 25.4 98.7 102 75.0-120 2.82 20 Vinyl chloride 25.0 25.9 26.6 104 106 64.0-133 2.32 20 Xylenes, Total 75.0 74.0 74.6 98.7 99.5 77.0-120 0.810 20 (S) Toluene-d8 92.1 91.2 80.0-120 (S) Dibromofluoromethane 91.2 93.0 76.0-123 (S) 4-Bromofluorobenzene 88.9 89.5 80.0-120

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 24 of 32 WG984594 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 8260B L911004-01,02,03,04,06,07

Method Blank (MB) 1 Cp (MB) R3222412-3 05/31/17 19:58 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ug/l ug/l ug/l Tc Acetone U 10.0 50.0 3 Acrolein U 8.87 50.0 Ss Acrylonitrile U 1.87 10.0

Benzene U 0.331 1.00 4 Bromobenzene U 0.352 1.00 Cn Bromodichloromethane U 0.380 1.00 5 Bromoform U 0.469 1.00 Sr Bromomethane U 0.866 5.00 n-Butylbenzene U 0.361 1.00 6 sec-Butylbenzene U 0.365 1.00 Qc tert-Butylbenzene U 0.399 1.00 7 Carbon disulfide U 0.275 1.00 Gl Carbon tetrachloride U 0.379 1.00

Chlorobenzene U 0.348 1.00 8 Chlorodibromomethane U 0.327 1.00 Al Chloroethane U 0.453 5.00 9 Chloroform U 0.324 5.00 Sc Chloromethane U 0.276 2.50 2-Chlorotoluene U 0.375 1.00 4-Chlorotoluene U 0.351 1.00 1,2-Dibromo-3-Chloropropane U 1.33 5.00 1,2-Dibromoethane U 0.381 1.00 Dibromomethane U 0.346 1.00 1,2-Dichlorobenzene U 0.349 1.00 1,3-Dichlorobenzene U 0.220 1.00 1,4-Dichlorobenzene U 0.274 1.00 Dichlorodifluoromethane U 0.551 5.00 1,1-Dichloroethane U 0.259 1.00 1,2-Dichloroethane U 0.361 1.00 1,1-Dichloroethene U 0.398 1.00 cis-1,2-Dichloroethene U 0.260 1.00 trans-1,2-Dichloroethene U 0.396 1.00 1,2-Dichloropropane U 0.306 1.00 1,1-Dichloropropene U 0.352 1.00 1,3-Dichloropropane U 0.366 1.00 cis-1,3-Dichloropropene U 0.418 1.00 trans-1,3-Dichloropropene U 0.419 1.00 2,2-Dichloropropane U 0.321 1.00 Di-isopropyl ether U 0.320 1.00 Ethylbenzene U 0.384 1.00

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 25 of 32 WG984594 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 8260B L911004-01,02,03,04,06,07

Method Blank (MB) 1 Cp (MB) R3222412-3 05/31/17 19:58 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ug/l ug/l ug/l Tc Hexachloro-1,3-butadiene U 0.256 1.00 3 Isopropylbenzene U 0.326 1.00 Ss p-Isopropyltoluene U 0.350 1.00

2-Butanone (MEK) U 3.93 10.0 4 Methylene Chloride U 1.00 5.00 Cn 4-Methyl-2-pentanone (MIBK) U 2.14 10.0 5 Methyl tert-butyl ether U 0.367 1.00 Sr Naphthalene U 1.00 5.00 n-Propylbenzene U 0.349 1.00 6 Styrene U 0.307 1.00 Qc 1,1,1,2-Tetrachloroethane U 0.385 1.00 7 1,1,2,2-Tetrachloroethane U 0.130 1.00 Gl Tetrachloroethene U 0.372 1.00

Toluene U 0.412 1.00 8 1,1,2-Trichlorotrifluoroethane U 0.303 1.00 Al 1,2,3-Trichlorobenzene U 0.230 1.00 9 1,2,4-Trichlorobenzene U 0.355 1.00 Sc 1,1,1-Trichloroethane U 0.319 1.00 1,1,2-Trichloroethane U 0.383 1.00 Trichloroethene U 0.398 1.00 Trichlorofluoromethane U 1.20 5.00 1,2,3-Trichloropropane U 0.807 2.50 1,2,3-Trimethylbenzene U 0.321 1.00 1,2,4-Trimethylbenzene U 0.373 1.00 1,3,5-Trimethylbenzene U 0.387 1.00 Vinyl chloride U 0.259 1.00 Xylenes, Total U 1.06 3.00 (S) Toluene-d8 100 80.0-120 (S) Dibromofluoromethane 90.3 76.0-123 (S) 4-Bromofluorobenzene 107 80.0-120

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3222412-1 05/31/17 19:07 • (LCSD) R3222412-2 05/31/17 19:24 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l % % % % % Acetone 125 136 150 109 120 10.0-160 9.49 23 Acrolein 125 843 784 674 627 10.0-160 E J4 E J4 7.21 20 Acrylonitrile 125 121 114 96.5 91.3 60.0-142 5.57 20

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 26 of 32 WG984594 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 8260B L911004-01,02,03,04,06,07

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) 1 Cp (LCS) R3222412-1 05/31/17 19:07 • (LCSD) R3222412-2 05/31/17 19:24 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 2 Analyte ug/l ug/l ug/l % % % % % Tc Benzene 25.0 23.3 24.0 93.3 95.9 69.0-123 2.67 20 3 Bromobenzene 25.0 25.2 25.8 101 103 79.0-120 2.03 20 Ss Bromodichloromethane 25.0 24.2 25.0 96.9 99.9 76.0-120 3.06 20

Bromoform 25.0 25.4 25.3 102 101 67.0-132 0.250 20 4 Bromomethane 25.0 26.8 26.8 107 107 18.0-160 0.130 20 Cn n-Butylbenzene 25.0 23.0 23.7 92.0 94.9 72.0-126 3.05 20 5 sec-Butylbenzene 25.0 25.6 26.4 103 106 74.0-121 2.88 20 Sr tert-Butylbenzene 25.0 25.1 25.5 101 102 75.0-122 1.23 20

Carbon disulfide 25.0 23.5 25.0 94.0 100 55.0-127 6.34 20 6 Carbon tetrachloride 25.0 23.0 25.1 91.8 100 63.0-122 8.95 20 Qc Chlorobenzene 25.0 25.6 26.7 103 107 79.0-121 4.17 20 7 Chlorodibromomethane 25.0 26.0 26.9 104 108 75.0-125 3.53 20 Gl Chloroethane 25.0 22.4 27.5 89.7 110 47.0-152 J3 20.5 20

Chloroform 25.0 22.8 24.3 91.3 97.3 72.0-121 6.43 20 8 Chloromethane 25.0 22.6 24.2 90.4 96.7 48.0-139 6.81 20 Al 2-Chlorotoluene 25.0 26.2 26.7 105 107 74.0-122 1.93 20 9 4-Chlorotoluene 25.0 26.1 26.3 104 105 79.0-120 0.720 20 Sc 1,2-Dibromo-3-Chloropropane 25.0 21.9 22.1 87.6 88.4 64.0-127 0.920 20 1,2-Dibromoethane 25.0 26.3 25.9 105 104 77.0-123 1.69 20 Dibromomethane 25.0 25.1 26.1 100 104 78.0-120 4.07 20 1,2-Dichlorobenzene 25.0 25.1 26.6 100 107 80.0-120 6.01 20 1,3-Dichlorobenzene 25.0 25.5 25.8 102 103 72.0-123 1.05 20 1,4-Dichlorobenzene 25.0 23.7 25.0 94.8 100 77.0-120 5.39 20 Dichlorodifluoromethane 25.0 26.8 30.4 107 122 49.0-155 12.4 20 1,1-Dichloroethane 25.0 23.8 24.9 95.3 99.7 70.0-126 4.52 20 1,2-Dichloroethane 25.0 23.7 25.0 94.8 100 67.0-126 5.49 20 1,1-Dichloroethene 25.0 24.2 25.4 96.7 102 64.0-129 4.98 20 cis-1,2-Dichloroethene 25.0 23.3 24.5 93.1 98.0 73.0-120 5.14 20 trans-1,2-Dichloroethene 25.0 23.0 24.7 91.9 98.6 71.0-121 7.04 20 1,2-Dichloropropane 25.0 25.5 26.5 102 106 75.0-125 3.77 20 1,1-Dichloropropene 25.0 24.0 25.2 96.1 101 71.0-129 4.61 20 1,3-Dichloropropane 25.0 26.6 25.9 106 103 80.0-121 2.71 20 cis-1,3-Dichloropropene 25.0 25.7 26.5 103 106 79.0-123 3.03 20 trans-1,3-Dichloropropene 25.0 25.9 25.4 104 102 74.0-127 1.73 20 2,2-Dichloropropane 25.0 22.3 21.3 89.1 85.1 60.0-125 4.55 20 Di-isopropyl ether 25.0 23.8 24.9 95.2 99.6 59.0-133 4.47 20 Ethylbenzene 25.0 25.7 27.4 103 110 77.0-120 6.38 20 Hexachloro-1,3-butadiene 25.0 23.7 25.3 94.9 101 64.0-131 6.31 20 Isopropylbenzene 25.0 26.0 26.6 104 106 75.0-120 2.44 20 p-Isopropyltoluene 25.0 27.0 27.1 108 108 74.0-126 0.280 20

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 27 of 32 WG984594 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (GC/MS) by Method 8260B L911004-01,02,03,04,06,07

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) 1 Cp (LCS) R3222412-1 05/31/17 19:07 • (LCSD) R3222412-2 05/31/17 19:24 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 2 Analyte ug/l ug/l ug/l % % % % % Tc 2-Butanone (MEK) 125 127 134 102 107 37.0-158 5.00 20 3 Methylene Chloride 25.0 21.7 22.6 86.7 90.3 66.0-121 4.04 20 Ss 4-Methyl-2-pentanone (MIBK) 125 132 124 106 99.2 59.0-143 6.13 20

Methyl tert-butyl ether 25.0 24.4 24.5 97.8 98.0 64.0-123 0.170 20 4 Naphthalene 25.0 25.9 25.7 103 103 62.0-128 0.670 20 Cn n-Propylbenzene 25.0 25.8 26.8 103 107 79.0-120 4.02 20 5 Styrene 25.0 27.4 28.0 110 112 78.0-124 2.21 20 Sr 1,1,1,2-Tetrachloroethane 25.0 25.8 26.9 103 108 75.0-122 4.38 20

1,1,2,2-Tetrachloroethane 25.0 28.1 26.2 112 105 71.0-122 6.92 20 6 Tetrachloroethene 25.0 24.1 25.4 96.5 101 70.0-127 4.97 20 Qc Toluene 25.0 25.1 25.9 100 104 77.0-120 3.41 20 7 1,1,2-Trichlorotrifluoroethane 25.0 23.7 24.9 94.9 99.5 61.0-136 4.72 20 Gl 1,2,3-Trichlorobenzene 25.0 26.5 26.2 106 105 61.0-133 1.10 20

1,2,4-Trichlorobenzene 25.0 22.5 23.6 90.0 94.6 69.0-129 4.95 20 8 1,1,1-Trichloroethane 25.0 23.9 24.9 95.7 99.6 68.0-122 4.06 20 Al 1,1,2-Trichloroethane 25.0 25.4 25.1 102 100 78.0-120 1.40 20 9 Trichloroethene 25.0 24.4 25.8 97.7 103 78.0-120 5.61 20 Sc Trichlorofluoromethane 25.0 23.9 25.0 95.6 99.9 56.0-137 4.44 20 1,2,3-Trichloropropane 25.0 26.4 26.0 105 104 72.0-124 1.41 20 1,2,3-Trimethylbenzene 25.0 25.4 26.8 102 107 75.0-120 5.27 20 1,2,4-Trimethylbenzene 25.0 26.2 26.9 105 108 75.0-120 2.64 20 1,3,5-Trimethylbenzene 25.0 25.9 26.8 104 107 75.0-120 3.26 20 Vinyl chloride 25.0 23.9 25.3 95.8 101 64.0-133 5.43 20 Xylenes, Total 75.0 77.8 78.5 104 105 77.0-120 0.900 20 (S) Toluene-d8 104 103 80.0-120 (S) Dibromofluoromethane 94.4 92.3 76.0-123 (S) 4-Bromofluorobenzene 109 104 80.0-120

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 28 of 32 GLOSSARY OF TERMS ONE LAB. NATIONWIDE.

Abbreviations and Definitions 1 Cp SDG Sample Delivery Group. MDL Method Detection Limit. 2 RDL Reported Detection Limit. Tc U Not detected at the Reporting Limit (or MDL where applicable). RPD Relative Percent Difference. 3 Ss (dry) Results are reported based on the dry weight of the sample. [this will only be present on a dry report basis for soils]. 4 Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) Cn from a quality control sample. The Original Sample may not be included within the reported SDG.

(S) Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control 5 Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring Sr recovery. Surrogates are not expected to be detected in all environmental media. Rec. Recovery. 6 Qc

7 Qualifier Description Gl E The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL). 8 J The identification of the analyte is acceptable; the reported value is an estimate. Al J3 The associated batch QC was outside the established quality control range for precision. 9 J4 The associated batch QC was outside the established quality control range for accuracy. Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 29 of 32 ACCREDITATIONS & LOCATIONS ONE LAB. NATIONWIDE.

ESC Lab Sciences is the only environmental laboratory accredited/certified to support your work nationwide from one location. One phone call, one point of contact, one laboratory. No other lab is as accessible or prepared to handle your needs throughout the country. Our capacity and capability from our single location laboratory is comparable to the collective totals of the 1 network laboratories in our industry. The most significant benefit to our “one location” design is the design of our laboratory campus. The model is conducive to accelerated productivity, Cp decreasing turn-around time, and preventing cross contamination, thus protecting sample integrity. Our focus on premium quality and prompt service allows us to be YOUR LAB OF CHOICE. * Not all certifications held by the laboratory are applicable to the results reported in the attached report. 2 Tc State Accreditations

Alabama 40660 Nevada TN-03-2002-34 3 Alaska UST-080 New Hampshire 2975 Ss Arizona AZ0612 New Jersey–NELAP TN002 4 Arkansas 88-0469 New Mexico TN00003 Cn California 01157CA New York 11742 Colorado TN00003 North Carolina Env375 5 Conneticut PH-0197 North Carolina 1 DW21704 Sr Florida E87487 North Carolina 2 41 Georgia NELAP North Dakota R-140 6 Georgia 1 923 Ohio–VAP CL0069 Qc Idaho TN00003 Oklahoma 9915 Illinois 200008 Oregon TN200002 7 Indiana C-TN-01 Pennsylvania 68-02979 Gl Iowa 364 Rhode Island 221 South Carolina 84004 Kansas E-10277 8 Kentucky 1 90010 South Dakota n/a Al Kentucky 2 16 Tennessee 1 4 2006 Louisiana AI30792 Texas T 104704245-07-TX 9 Maine TN0002 Texas 5 LAB0152 Sc Maryland 324 Utah 6157585858 Massachusetts M-TN003 Vermont VT2006 Michigan 9958 Virginia 109 Minnesota 047-999-395 Washington C1915 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 9980939910 Montana CERT0086 Wyoming A2LA Nebraska NE-OS-15-05 Third Party & Federal Accreditations

A2LA – ISO 17025 1461.01 AIHA-LAP,LLC 100789 A2LA – ISO 17025 5 1461.02 DOD 1461.01 Canada 1461.01 USDA S-67674 EPA–Crypto TN00003

1. Drinking Water 2. Underground Storage Tanks 3. Aquatic Toxicity 4. Chemical/Microbiological 5. Mold n/a Accreditation not applicable Our Locations

ESC Lab Sciences has sixty-four client support centers that provide sample pickup and/or the delivery of sampling supplies. If you would like assistance from one of our support offices, please contact our main office.ESC Lab Sciences performs all testing at our central laboratory.

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911004 06/01/17 14:4811:59 30 of 32

ANALYTICAL REPORT May 31, 2017

Oregon Dept. of Env. Quality - ODEQ Sample Delivery Group: L911085 Samples Received: 05/20/2017 Project Number: 2103-00 Description: DEQ-Ivy's Market

Report To: Katie Robertson 3150 NW 229th St., Suite 150 Hillsboro, OR 97124

Entire Report Reviewed By: [Preliminary Report] Brian Ford Technical Service Representative

Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by ESC is performed per guidance provided in laboratory standard operating procedures: 060302, 060303, and 060304.

12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.esclabsciences.com TABLE OF CONTENTS ONE LAB. NATIONWIDE.

Cp: Cover Page 1 1 Cp Tc: Table of Contents 2

2 Ss: Sample Summary 3 Tc Cn: Case Narrative 4 3 Sr: Sample Results 5 Ss

SVE SYSTEM L911085-01 5 4 Cn VP-2 L911085-02 7

5 VP-4 L911085-03 9 Sr Qc: Quality Control Summary 11 6 Volatile Organic Compounds (MS) by Method TO-15 11 Qc

Gl: Glossary of Terms 17 7 Gl Al: Accreditations & Locations 18

8 Sc: Chain of Custody 19 Al

9 Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 2 of 20 SAMPLE SUMMARY ONE LAB. NATIONWIDE.

Collected by Collected date/time Received date/time Chris Clough 05/18/17 13:27 05/20/17 08:45 1 SVE SYSTEM L911085-01 Air Cp Method Batch Dilution Preparation Analysis Analyst 2 date/time date/time Tc Volatile Organic Compounds (MS) by Method TO-15 WG983150 1 05/26/17 00:09 05/26/17 00:09 MBF

Volatile Organic Compounds (MS) by Method TO-15 WG984274 10 05/30/17 14:20 05/30/17 14:20 MJ 3 Ss

Collected by Collected date/time Received date/time 4 VP-2 L911085-02 Air Chris Clough 05/18/17 13:17 05/20/17 08:45 Cn Method Batch Dilution Preparation Analysis Analyst 5 date/time date/time Sr Volatile Organic Compounds (MS) by Method TO-15 WG983150 1 05/26/17 01:01 05/26/17 01:01 MBF 6 Volatile Organic Compounds (MS) by Method TO-15 WG983836 1 05/27/17 11:47 05/27/17 11:47 MBF Qc

Collected by Collected date/time Received date/time 7 Gl VP-4 L911085-03 Air Chris Clough 05/18/17 13:35 05/20/17 08:45

Method Batch Dilution Preparation Analysis Analyst 8 date/time date/time Al Volatile Organic Compounds (MS) by Method TO-15 WG983150 1 05/26/17 01:55 05/26/17 01:55 MBF 9 Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 3 of 20 CASE NARRATIVE ONE LAB. NATIONWIDE.

1 Cp All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times. All MDL (LOD) and RDL (LOQ) 2 values reported for environmental samples have been corrected for the dilution factor used in the Tc analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my 3 digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the Ss laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the 4 data. Cn

5 Sr

6 Qc [Preliminary Report] 7 Gl

Brian Ford 8 Technical Service Representative Al

9 Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 4 of 20 SVE SYSTEM SAMPLE RESULTS - 01 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 13:27 L911085

Volatile Organic Compounds (MS) by Method TO-15 1 Cp CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3 2 Acetone 67-64-1 58.10 1.25 2.97 3.46 8.22 1 WG983150 Tc Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG983150 3 Benzene 71-43-2 78.10 0.200 0.639 26.5 84.5 1 WG983150 Ss Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG983150 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG983150 4 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG983150 Cn Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG983150 5 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG983150 Sr Carbon disulfide 75-15-0 76.10 0.200 0.622 ND ND 1 WG983150 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG983150 6 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG983150 Qc Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG983150 7 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG983150 Gl Chloromethane 74-87-3 50.50 0.200 0.413 0.530 1.09 1 WG983150 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG983150 8 Cyclohexane 110-82-7 84.20 2.00 6.89 125 431 10 WG984274 Al Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG983150 9 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG983150 Sc 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG983150 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG983150 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG983150 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG983150 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG983150 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG983150 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG983150 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG983150 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG983150 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG983150 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG983150 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG983150 Ethanol 64-17-5 46.10 0.630 1.19 4.08 7.69 1 WG983150 Ethylbenzene 100-41-4 106 0.200 0.867 12.0 52.2 1 WG983150 4-Ethyltoluene 622-96-8 120 0.200 0.982 19.8 97.1 1 WG983150 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.229 1.29 1 WG983150 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.267 1.32 1 WG983150 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 ND ND 1 WG983150 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG983150 Heptane 142-82-5 100 2.00 8.18 75.1 307 10 WG984274 Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG983150 n-Hexane 110-54-3 86.20 2.00 7.05 406 1430 10 WG984274 Isopropylbenzene 98-82-8 120.20 0.200 0.983 0.402 1.98 1 WG983150 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG983150 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG983150 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 ND ND 1 WG983150 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG983150 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG983150 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG983150 Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG983150 2-Propanol 67-63-0 60.10 1.25 3.07 ND ND 1 WG983150 Propene 115-07-1 42.10 0.400 0.689 0.592 1.02 1 WG983150 Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG983150 1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG983150 Tetrachloroethylene 127-18-4 166 0.200 1.36 1.07 7.25 1 WG983150 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG983150 Toluene 108-88-3 92.10 2.00 7.53 133 500 10 WG984274 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG983150

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 5 of 20 SVE SYSTEM SAMPLE RESULTS - 01 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 13:27 L911085 Volatile Organic Compounds (MS) by Method TO-15 1 CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Cp Analyte ppbv ug/m3 ppbv ug/m3 2 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 ND ND 1 WG983150 Tc 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG983150

Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG983150 3 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 11.3 55.4 1 WG983150 Ss 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 13.2 64.6 1 WG983150 4 2,2,4-Trimethylpentane 540-84-1 114.22 2.00 9.34 277 1290 10 WG984274 Cn Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG983150

Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG983150 5 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG983150 Sr m&p-Xylene 1330-20-7 106 0.400 1.73 92.3 400 1 WG983150 6 o-Xylene 95-47-6 106 0.200 0.867 33.2 144 1 WG983150 Qc TPH (GC/MS) Low Fraction 8006-61-9 101 500 2070 4850 20000 10 WG984274

(S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 101 WG984274 7 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 108 WG983150 Gl

8 Al

9 Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 6 of 20 VP-2 SAMPLE RESULTS - 02 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 13:17 L911085

Volatile Organic Compounds (MS) by Method TO-15 1 Cp CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3 2 Acetone 67-64-1 58.10 1.25 2.97 2.06 4.89 1 WG983150 Tc Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG983150 3 Benzene 71-43-2 78.10 0.200 0.639 0.276 0.882 1 WG983150 Ss Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG983150 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG983150 4 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG983150 Cn Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG983150 5 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG983150 Sr Carbon disulfide 75-15-0 76.10 0.200 0.622 0.448 1.39 1 WG983150 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG983150 6 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG983150 Qc Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG983150 7 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG983150 Gl Chloromethane 74-87-3 50.50 0.200 0.413 0.236 0.488 1 WG983150 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG983150 8 Cyclohexane 110-82-7 84.20 0.200 0.689 0.276 0.950 1 WG983150 Al Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG983150 9 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG983150 Sc 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG983150 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG983150 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG983150 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG983150 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG983150 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG983150 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG983150 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG983150 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG983150 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG983150 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG983150 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG983150 Ethanol 64-17-5 46.10 0.630 1.19 ND ND 1 WG983150 Ethylbenzene 100-41-4 106 0.200 0.867 0.251 1.09 1 WG983150 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.390 1.92 1 WG983150 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.238 1.34 1 WG983150 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.262 1.30 1 WG983150 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 ND ND 1 WG983150 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG983150 Heptane 142-82-5 100 0.200 0.818 0.404 1.65 1 WG983150 Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG983150 n-Hexane 110-54-3 86.20 0.200 0.705 1.08 3.82 1 WG983150 Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG983150 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG983150 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG983150 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 ND ND 1 WG983150 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG983150 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG983150 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG983150 Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG983150 2-Propanol 67-63-0 60.10 1.25 3.07 ND ND 1 WG983150 Propene 115-07-1 42.10 0.400 0.689 1.24 2.13 1 WG983150 Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG983150 1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG983150 Tetrachloroethylene 127-18-4 166 0.200 1.36 0.208 1.41 1 WG983150 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 0.811 2.39 1 WG983150 Toluene 108-88-3 92.10 0.200 0.753 0.921 3.47 1 WG983150 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG983150

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 7 of 20 VP-2 SAMPLE RESULTS - 02 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 13:17 L911085 Volatile Organic Compounds (MS) by Method TO-15 1 CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Cp Analyte ppbv ug/m3 ppbv ug/m3 2 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 ND ND 1 WG983150 Tc 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG983150

Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG983150 3 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.491 2.41 1 WG983150 Ss 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 ND ND 1 WG983150 4 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG983836 Cn Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG983150

Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG983150 5 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG983150 Sr m&p-Xylene 1330-20-7 106 0.400 1.73 1.19 5.18 1 WG983150 6 o-Xylene 95-47-6 106 0.200 0.867 0.359 1.55 1 WG983150 Qc TPH (GC/MS) Low Fraction 8006-61-9 101 50.0 207 71.8 297 1 WG983150

(S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 91.6 WG983836 7 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 99.6 WG983150 Gl

8 Al

9 Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 8 of 20 VP-4 SAMPLE RESULTS - 03 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 13:35 L911085

Volatile Organic Compounds (MS) by Method TO-15 1 Cp CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3 2 Acetone 67-64-1 58.10 1.25 2.97 ND ND 1 WG983150 Tc Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG983150 3 Benzene 71-43-2 78.10 0.200 0.639 0.213 0.679 1 WG983150 Ss Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG983150 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG983150 4 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG983150 Cn Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG983150 5 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG983150 Sr Carbon disulfide 75-15-0 76.10 0.200 0.622 ND ND 1 WG983150 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG983150 6 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG983150 Qc Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG983150 7 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG983150 Gl Chloromethane 74-87-3 50.50 0.200 0.413 0.347 0.716 1 WG983150 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG983150 8 Cyclohexane 110-82-7 84.20 0.200 0.689 ND ND 1 WG983150 Al Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG983150 9 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG983150 Sc 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG983150 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 0.346 2.08 1 WG983150 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 0.288 1.73 1 WG983150 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG983150 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG983150 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG983150 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG983150 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG983150 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG983150 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG983150 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG983150 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG983150 Ethanol 64-17-5 46.10 0.630 1.19 ND ND 1 WG983150 Ethylbenzene 100-41-4 106 0.200 0.867 0.318 1.38 1 WG983150 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.598 2.93 1 WG983150 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.240 1.35 1 WG983150 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.270 1.33 1 WG983150 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 ND ND 1 WG983150 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG983150 Heptane 142-82-5 100 0.200 0.818 0.320 1.31 1 WG983150 Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG983150 n-Hexane 110-54-3 86.20 0.200 0.705 0.847 2.99 1 WG983150 Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG983150 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG983150 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG983150 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 ND ND 1 WG983150 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG983150 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG983150 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG983150 Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG983150 2-Propanol 67-63-0 60.10 1.25 3.07 ND ND 1 WG983150 Propene 115-07-1 42.10 0.400 0.689 0.538 0.927 1 WG983150 Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG983150 1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG983150 Tetrachloroethylene 127-18-4 166 0.200 1.36 ND ND 1 WG983150 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 0.919 2.71 1 WG983150 Toluene 108-88-3 92.10 0.200 0.753 0.811 3.06 1 WG983150 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG983150

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 9 of 20 VP-4 SAMPLE RESULTS - 03 ONE LAB. NATIONWIDE. Collected date/time: 05/18/17 13:35 L911085 Volatile Organic Compounds (MS) by Method TO-15 1 CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Cp Analyte ppbv ug/m3 ppbv ug/m3 2 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 ND ND 1 WG983150 Tc 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG983150

Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG983150 3 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.824 4.04 1 WG983150 Ss 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 0.221 1.08 1 WG983150 4 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG983150 Cn Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG983150

Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG983150 5 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG983150 Sr m&p-Xylene 1330-20-7 106 0.400 1.73 1.46 6.34 1 WG983150 6 o-Xylene 95-47-6 106 0.200 0.867 0.450 1.95 1 WG983150 Qc TPH (GC/MS) Low Fraction 8006-61-9 101 50.0 207 59.6 246 1 WG983150

(S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 100 WG983150 7 Gl

8 Al

9 Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 10 of 20 WG983150 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (MS) by Method TO-15 L911085-01,02,03

Method Blank (MB) 1 Cp (MB) R3221163-3 05/25/17 09:04 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ppbv ppbv ppbv Tc Acetone U 0.0569 1.25 3 Allyl Chloride U 0.0546 0.200 Ss Benzene U 0.0460 0.200

Benzyl Chloride U 0.0598 0.200 4 Bromodichloromethane U 0.0436 0.200 Cn Bromoform U 0.0786 0.600 5 Bromomethane U 0.0609 0.200 Sr 1,3-Butadiene U 0.0563 2.00

Carbon disulfide U 0.0544 0.200 6 Carbon tetrachloride U 0.0585 0.200 Qc Chlorobenzene U 0.0601 0.200 7 Chloroethane U 0.0489 0.200 Gl Chloroform U 0.0574 0.200

Chloromethane U 0.0544 0.200 8 2-Chlorotoluene U 0.0605 0.200 Al Cyclohexane U 0.0534 0.200 9 Dibromochloromethane U 0.0494 0.200 Sc 1,2-Dibromoethane U 0.0185 0.200 1,2-Dichlorobenzene U 0.0603 0.200 1,3-Dichlorobenzene U 0.0597 0.200 1,4-Dichlorobenzene U 0.0557 0.200 1,2-Dichloroethane U 0.0616 0.200 1,1-Dichloroethane U 0.0514 0.200 1,1-Dichloroethene U 0.0490 0.200 cis-1,2-Dichloroethene U 0.0389 0.200 trans-1,2-Dichloroethene U 0.0464 0.200 1,2-Dichloropropane U 0.0599 0.200 cis-1,3-Dichloropropene U 0.0588 0.200 trans-1,3-Dichloropropene U 0.0435 0.200 1,4-Dioxane U 0.0554 0.200 Ethylbenzene U 0.0506 0.200 4-Ethyltoluene U 0.0666 0.200 Trichlorofluoromethane U 0.0673 0.200 Dichlorodifluoromethane U 0.0601 0.200 1,1,2-Trichlorotrifluoroethane U 0.0687 0.200 1,2-Dichlorotetrafluoroethane U 0.0458 0.200 Heptane U 0.0626 0.200 Hexachloro-1,3-butadiene U 0.0656 0.630 n-Hexane U 0.0457 0.200 Isopropylbenzene U 0.0563 0.200

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 11 of 20 WG983150 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (MS) by Method TO-15 L911085-01,02,03

Method Blank (MB) 1 Cp (MB) R3221163-3 05/25/17 09:04 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ppbv ppbv ppbv Tc Methylene Chloride U 0.0465 0.200 3 Methyl Butyl Ketone U 0.0682 1.25 Ss 2-Butanone (MEK) U 0.0493 1.25

4-Methyl-2-pentanone (MIBK) U 0.0650 1.25 4 Methyl Methacrylate U 0.0773 0.200 Cn MTBE U 0.0505 0.200 5 Naphthalene 0.205 J 0.154 0.630 Sr 2-Propanol U 0.0882 1.25

Propene U 0.0932 0.400 6 Styrene U 0.0465 0.200 Qc 1,1,2,2-Tetrachloroethane U 0.0576 0.200 7 Tetrachloroethylene U 0.0497 0.200 Gl Tetrahydrofuran U 0.0508 0.200

Toluene U 0.0499 0.200 8 1,2,4-Trichlorobenzene U 0.148 0.630 Al 1,1,1-Trichloroethane U 0.0665 0.200 9 1,1,2-Trichloroethane U 0.0287 0.200 Sc Trichloroethylene U 0.0545 0.200 1,2,4-Trimethylbenzene U 0.0483 0.200 1,3,5-Trimethylbenzene U 0.0631 0.200 2,2,4-Trimethylpentane U 0.0456 0.200 Vinyl chloride U 0.0457 0.200 Vinyl Bromide U 0.0727 0.200 Vinyl acetate U 0.0639 0.200 m&p-Xylene U 0.0946 0.400 o-Xylene U 0.0633 0.200 Ethanol U 0.0832 0.630 TPH (GC/MS) Low Fraction U 6.91 50.0 (S) 1,4-Bromofluorobenzene 94.0 60.0-140

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3221163-1 05/25/17 07:27 • (LCSD) R3221163-2 05/25/17 08:15 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ppbv ppbv ppbv % % % % % Ethanol 3.75 3.92 3.57 104 95.2 52.0-158 9.29 25 Propene 3.75 4.26 3.83 114 102 54.0-155 10.6 25 Dichlorodifluoromethane 3.75 3.51 3.63 93.7 96.8 69.0-143 3.30 25 1,2-Dichlorotetrafluoroethane 3.75 3.99 3.97 106 106 70.0-130 0.610 25

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 12 of 20 WG983150 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (MS) by Method TO-15 L911085-01,02,03

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) 1 Cp (LCS) R3221163-1 05/25/17 07:27 • (LCSD) R3221163-2 05/25/17 08:15 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 2 Analyte ppbv ppbv ppbv % % % % % Tc Chloromethane 3.75 4.17 3.86 111 103 70.0-130 7.80 25 3 Vinyl chloride 3.75 4.13 4.09 110 109 70.0-130 1.02 25 Ss 1,3-Butadiene 3.75 4.58 4.53 122 121 70.0-130 1.09 25

Bromomethane 3.75 3.42 3.33 91.3 88.8 70.0-130 2.74 25 4 Chloroethane 3.75 3.81 3.70 102 98.5 70.0-130 2.98 25 Cn Trichlorofluoromethane 3.75 3.71 3.84 98.9 102 70.0-130 3.45 25 5 1,1,2-Trichlorotrifluoroethane 3.75 3.51 3.89 93.5 104 70.0-130 10.3 25 Sr 1,1-Dichloroethene 3.75 4.06 3.82 108 102 70.0-130 6.10 25

1,1-Dichloroethane 3.75 3.91 3.82 104 102 70.0-130 2.27 25 6 Acetone 3.75 4.21 3.77 112 100 70.0-130 11.0 25 Qc 2-Propanol 3.75 4.10 3.72 109 99.2 66.0-150 9.64 25 7 Carbon disulfide 3.75 3.81 3.89 102 104 70.0-130 1.97 25 Gl Methylene Chloride 3.75 3.78 3.70 101 98.6 70.0-130 2.26 25

MTBE 3.75 3.89 3.80 104 101 70.0-130 2.35 25 8 trans-1,2-Dichloroethene 3.75 3.96 3.85 106 103 70.0-130 2.68 25 Al n-Hexane 3.75 3.90 3.83 104 102 70.0-130 1.93 25 9 Vinyl acetate 3.75 3.99 3.90 106 104 70.0-130 2.17 25 Sc Methyl Ethyl Ketone 3.75 4.00 3.90 107 104 70.0-130 2.39 25 cis-1,2-Dichloroethene 3.75 3.95 3.83 105 102 70.0-130 3.27 25 Chloroform 3.75 3.95 3.83 105 102 70.0-130 2.96 25 Cyclohexane 3.75 3.90 3.80 104 101 70.0-130 2.52 25 1,1,1-Trichloroethane 3.75 3.93 3.82 105 102 70.0-130 2.95 25 Carbon tetrachloride 3.75 3.89 3.78 104 101 70.0-130 3.07 25 Benzene 3.75 3.93 3.85 105 103 70.0-130 1.86 25 1,2-Dichloroethane 3.75 3.96 3.86 106 103 70.0-130 2.50 25 Heptane 3.75 3.92 3.83 105 102 70.0-130 2.25 25 Trichloroethylene 3.75 3.94 3.89 105 104 70.0-130 1.51 25 1,2-Dichloropropane 3.75 3.85 3.75 103 99.9 70.0-130 2.83 25 1,4-Dioxane 3.75 4.28 4.14 114 110 70.0-152 3.40 25 Bromodichloromethane 3.75 3.98 3.88 106 103 70.0-130 2.62 25 cis-1,3-Dichloropropene 3.75 4.01 3.89 107 104 70.0-130 3.01 25 4-Methyl-2-pentanone (MIBK) 3.75 4.12 3.97 110 106 70.0-142 3.59 25 Toluene 3.75 3.96 3.81 106 102 70.0-130 3.88 25 trans-1,3-Dichloropropene 3.75 4.05 3.88 108 103 70.0-130 4.46 25 1,1,2-Trichloroethane 3.75 3.91 3.82 104 102 70.0-130 2.11 25 Tetrachloroethylene 3.75 4.04 3.86 108 103 70.0-130 4.63 25 Methyl Butyl Ketone 3.75 4.17 4.03 111 107 70.0-150 3.42 25 Dibromochloromethane 3.75 3.92 3.80 105 101 70.0-130 3.03 25 1,2-Dibromoethane 3.75 3.98 3.85 106 103 70.0-130 3.37 25 Chlorobenzene 3.75 3.87 3.72 103 99.3 70.0-130 3.84 25

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 13 of 20 WG983150 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (MS) by Method TO-15 L911085-01,02,03

Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) 1 Cp (LCS) R3221163-1 05/25/17 07:27 • (LCSD) R3221163-2 05/25/17 08:15 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits 2 Analyte ppbv ppbv ppbv % % % % % Tc Ethylbenzene 3.75 3.80 3.70 101 98.6 70.0-130 2.69 25 3 m&p-Xylene 7.50 7.29 7.07 97.3 94.3 70.0-130 3.08 25 Ss o-Xylene 3.75 3.63 3.52 96.9 93.8 70.0-130 3.21 25

Styrene 3.75 3.85 3.72 103 99.3 70.0-130 3.32 25 4 Bromoform 3.75 3.87 3.79 103 101 70.0-130 2.10 25 Cn 1,1,2,2-Tetrachloroethane 3.75 3.57 3.49 95.2 93.1 70.0-130 2.19 25 5 4-Ethyltoluene 3.75 3.50 3.39 93.3 90.5 70.0-130 3.04 25 Sr 1,3,5-Trimethylbenzene 3.75 3.48 3.36 92.8 89.7 70.0-130 3.41 25

1,2,4-Trimethylbenzene 3.75 3.49 3.39 93.0 90.3 70.0-130 2.92 25 6 1,3-Dichlorobenzene 3.75 3.60 3.48 95.9 92.8 70.0-130 3.38 25 Qc 1,4-Dichlorobenzene 3.75 3.60 3.48 95.9 92.9 70.0-130 3.14 25 7 Benzyl Chloride 3.75 3.69 3.56 98.4 95.1 70.0-144 3.49 25 Gl 1,2-Dichlorobenzene 3.75 3.36 3.27 89.6 87.3 70.0-130 2.67 25

1,2,4-Trichlorobenzene 3.75 3.81 3.80 102 101 70.0-155 0.500 25 8 Hexachloro-1,3-butadiene 3.75 3.42 3.45 91.3 92.0 70.0-145 0.770 25 Al Naphthalene 3.75 4.56 4.43 122 118 70.0-155 2.97 25 9 TPH (GC/MS) Low Fraction 176 179 178 102 101 70.0-130 1.00 25 Sc Allyl Chloride 3.75 4.09 3.80 109 101 70.0-130 7.39 25 2-Chlorotoluene 3.75 3.56 3.20 94.8 85.4 70.0-130 10.5 25 Methyl Methacrylate 3.75 4.03 3.94 107 105 70.0-130 2.37 25 Tetrahydrofuran 3.75 3.84 3.76 102 100 70.0-140 2.07 25 2,2,4-Trimethylpentane 3.75 3.95 3.85 105 103 70.0-130 2.69 25 Vinyl Bromide 3.75 3.44 3.93 91.7 105 70.0-130 13.3 25 Isopropylbenzene 3.75 3.46 3.36 92.4 89.6 70.0-130 2.99 25 (S) 1,4-Bromofluorobenzene 99.6 98.5 60.0-140

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 14 of 20 WG983836 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (MS) by Method TO-15 L911085-02

Method Blank (MB) 1 Cp (MB) R3221489-3 05/27/17 10:53 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ppbv ppbv ppbv Tc 2,2,4-Trimethylpentane U 0.0456 0.200 3 (S) 1,4-Bromofluorobenzene 89.6 60.0-140 Ss

4 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) Cn (LCS) R3221489-1 05/27/17 08:23 • (LCSD) R3221489-2 05/27/17 09:06 5 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Sr Analyte ppbv ppbv ppbv % % % % % 2,2,4-Trimethylpentane 3.75 3.70 3.66 98.6 97.7 70.0-130 0.950 25 6 Qc (S) 1,4-Bromofluorobenzene 91.3 89.9 60.0-140

7 Gl

8 Al

9 Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 15 of 20 WG984274 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE. Volatile Organic Compounds (MS) by Method TO-15 L911085-01

Method Blank (MB) 1 Cp (MB) R3221903-3 05/30/17 10:39 MB Result MB Qualifier MB MDL MB RDL 2 Analyte ppbv ppbv ppbv Tc Cyclohexane U 0.0534 0.200 3 Heptane U 0.0626 0.200 Ss n-Hexane U 0.0457 0.200

Toluene U 0.0499 0.200 4 2,2,4-Trimethylpentane U 0.0456 0.200 Cn TPH (GC/MS) Low Fraction U 6.91 50.0 5 (S) 1,4-Bromofluorobenzene 97.3 60.0-140 Sr

6 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) Qc (LCS) R3221903-1 05/30/17 09:11 • (LCSD) R3221903-2 05/30/17 09:55 7 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Gl Analyte ppbv ppbv ppbv % % % % % n-Hexane 3.75 3.89 3.97 104 106 70.0-130 1.96 25 8 Al Cyclohexane 3.75 3.97 4.08 106 109 70.0-130 2.66 25 Heptane 3.75 3.98 3.96 106 106 70.0-130 0.650 25 9 Toluene 3.75 4.04 4.04 108 108 70.0-130 0.0900 25 Sc TPH (GC/MS) Low Fraction 176 193 194 109 110 70.0-130 0.930 25 2,2,4-Trimethylpentane 3.75 3.91 4.02 104 107 70.0-130 2.63 25 (S) 1,4-Bromofluorobenzene 98.1 98.2 60.0-140

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 16 of 20 GLOSSARY OF TERMS ONE LAB. NATIONWIDE.

Abbreviations and Definitions 1 Cp SDG Sample Delivery Group. MDL Method Detection Limit. 2 RDL Reported Detection Limit. Tc ND Not detected at the Reporting Limit (or MDL where applicable). U Not detected at the Reporting Limit (or MDL where applicable). 3 Ss RPD Relative Percent Difference. (S) Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control 4 Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring Cn recovery. Surrogates are not expected to be detected in all environmental media.

Rec. Recovery. 5 Sr

6 Qualifier Description Qc J The identification of the analyte is acceptable; the reported value is an estimate. 7 Gl

8 Al

9 Sc

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 17 of 20 ACCREDITATIONS & LOCATIONS ONE LAB. NATIONWIDE.

ESC Lab Sciences is the only environmental laboratory accredited/certified to support your work nationwide from one location. One phone call, one point of contact, one laboratory. No other lab is as accessible or prepared to handle your needs throughout the country. Our capacity and capability from our single location laboratory is comparable to the collective totals of the 1 network laboratories in our industry. The most significant benefit to our “one location” design is the design of our laboratory campus. The model is conducive to accelerated productivity, Cp decreasing turn-around time, and preventing cross contamination, thus protecting sample integrity. Our focus on premium quality and prompt service allows us to be YOUR LAB OF CHOICE. * Not all certifications held by the laboratory are applicable to the results reported in the attached report. 2 Tc State Accreditations

Alabama 40660 Nevada TN-03-2002-34 3 Alaska UST-080 New Hampshire 2975 Ss Arizona AZ0612 New Jersey–NELAP TN002 4 Arkansas 88-0469 New Mexico TN00003 Cn California 01157CA New York 11742 Colorado TN00003 North Carolina Env375 5 Conneticut PH-0197 North Carolina 1 DW21704 Sr Florida E87487 North Carolina 2 41 Georgia NELAP North Dakota R-140 6 Georgia 1 923 Ohio–VAP CL0069 Qc Idaho TN00003 Oklahoma 9915 Illinois 200008 Oregon TN200002 7 Indiana C-TN-01 Pennsylvania 68-02979 Gl Iowa 364 Rhode Island 221 South Carolina 84004 Kansas E-10277 8 Kentucky 1 90010 South Dakota n/a Al Kentucky 2 16 Tennessee 1 4 2006 Louisiana AI30792 Texas T 104704245-07-TX 9 Maine TN0002 Texas 5 LAB0152 Sc Maryland 324 Utah 6157585858 Massachusetts M-TN003 Vermont VT2006 Michigan 9958 Virginia 109 Minnesota 047-999-395 Washington C1915 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 9980939910 Montana CERT0086 Wyoming A2LA Nebraska NE-OS-15-05 Third Party & Federal Accreditations

A2LA – ISO 17025 1461.01 AIHA-LAP,LLC 100789 A2LA – ISO 17025 5 1461.02 DOD 1461.01 Canada 1461.01 USDA S-67674 EPA–Crypto TN00003

1. Drinking Water 2. Underground Storage Tanks 3. Aquatic Toxicity 4. Chemical/Microbiological 5. Mold n/a Accreditation not applicable Our Locations

ESC Lab Sciences has sixty-four client support centers that provide sample pickup and/or the delivery of sampling supplies. If you would like assistance from one of our support offices, please contact our main office.ESC Lab Sciences performs all testing at our central laboratory.

ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Oregon Dept. of Env. Quality - ODEQ 2103-00 L911085 05/31/17 13:1313:11 18 of 20