Show That Current Concentrations of Cocs Are Below Laboratory Reporting Limits

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Site Investigation Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington VCP ID: SW1182

July 29, 2013

Site Investigation Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

1 Introduction and site Background 1

1.1 Site Description 1

1.2 Site Geology and Hydrogeology 2

1.3 Site History 2 2 Potential Constituents of Concern 5

3 Conceptual Site Model 6

3.1 Potential Constituent Sources 7

3.2 Potential Transport Mechanisms and Receptors 7

3.2.1 Ecological Receptors 9

3.3 Potential Exposure Pathways 9 4 Site Cleanup Levels 9

4.1 Method A Cleanup Levels 9

4.2 Points of Compliance 11

4.3 Applicable Relevant and Appropriate Regulations 12

4.3.1 Federal 12

4.3.2 State 13 5 Compliance with MTCA Statutes and Regulations 13

5.1 Soil 13

5.2 Groundwater 14

5.3 Surface Waters 14

5.4 Sediment 14

5.5 Soil Vapor 15

5.6 Ecological and Natural Resources 15

5.7 Cultural and Archaeological Resources 15

6 2013 Site Investigation Activities 16

6.1 Utility Clearance 16

6.2 Soil Boring Installation 16

Site Investigation Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

6.3 Soil Screening and Lithology 17

6.4 Soil Sample Collection 17

6.5 Monitoring Well Development 18

6.6 Groundwater Sample Collection 18

6.7 Investigation Derived Waste Management 19

6.8 Results 20

6.8.1 Soil Analytical Results 20

6.8.2 Groundwater Analytical Results 20 7 Current Site Conditions 21

7.1 Soil 21

7.2 Groundwater 21 8 Conclusion and No Further Action Request 22

9 References 23

Tables

Table 1 Historical Soil Analytical Results

Table 2 Groundwater Analytical Results – January 2011 and April 2013

Table 3 Soil Analytical Results – April 2013

Figures

Figure 1 Site Location Map

Figure 2 Aerial Map

Figure 3 Site Plan with Historical Soil Boring and Soil Sample Locations

Figure 4 Conceptual Site Model of Human Exposure Pathways

Figure 5 Site Plan with Soil Boring Locations and Analytical Results – April 8- 11, 2013

Figure 6 Site Plan with Groundwater Analytical Results – April 17, 2013

Site Investigation Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

Appendices

A Response to No Further Action Request, Ecology 2011

B Soil Boring Logs

C Laboratory Analytical Reports and Chains-of-Custody

D Monitoring Well Development Logs

E Groundwater Sampling Field Data Sheets

iii

Site Investigation Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

Acronyms and Abbreviations

ARCADIS ARCADIS U.S., Inc. bgs below ground surface BTEX benzene, toluene, ethylbenzene, total xylenes COCs constituents of concern CUL cleanup level Ecology Washington State Department of Ecology DRO total petroleum hydrocarbons - diesel range organics EDB Ethylene dibromide EDC 1,2-dichloroethane GRO total petroleum hydrocarbons - gasoline range organics HO total petroleum hydrocarbons - heavy-oil range organics LUST Leaking Underground Storage Tank mg/kg milligrams per kilogram MTBE methyl tertiary-butyl ether MTCA Model Toxics Control Act NFA No Further Action PID photoionization detector PVC polyvinyl chloride site ARCO Facility No. 6008 located at 212 15th Street, Washougal, Washington g/L micrograms per liter USEPA U.S. Environmental Protection Agency UST underground storage tank VCP Voluntary Cleanup Program

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

1 Introduction and site Background

On behalf of BP West Coast Products LLC, ARCADIS U.S., Inc. (ARCADIS) has prepared this Site Investigation Report and No Further Action Request (report) for ARCO Facility No. 6008, located at 212 15th Street in Washougal, Washington (site). On June 30, 2011, ARCADIS requested a No Further Action (NFA) determination for the site from the Washington State Department of Ecology (ARCADIS 2011). In response, the Washington State Department of Ecology (Ecology) determined that further site investigation was necessary prior to issuance of a NFA determination. The Ecology Determination Letter is included in Appendix A. Subsequently, in April 2013, ARCADIS conducted a site investigation to further delineate residual soil and groundwater impacts at the site.

This report summarizes the installation and sampling of four soil borings (MW-1 [SB-4], MW-2, MW-3, and SB-5) at the site. Three of the borings were completed as monitoring wells. The objective of this investigation was to define the extent of impacted soil and groundwater exceeding the Model Toxics Control Act (MTCA) Method A cleanup levels (CULs) as presented in tables 720-1 and 740-1 of Washington Administrative Code (WAC) Chapter 173-340-704 (2007). A site location map and aerial map are presented on Figures 1 and 2, respectively. A site plan with historical soil boring locations is presented on Figure 3.

1.1 Site Description

The site is located on the northeast corner of the intersection of 15th Street (Washougal River Road) and B Street (Main Street) in Washougal, Washington. The site is improved with one building that is currently operating as an AM/PM convenience store and ARCO-branded service station. Four 10,000 gallon double-walled, fiberglass gasoline underground storage tanks (USTs) are located on the north side of the site. A canopy covering four dual dispenser islands is located west of the station building, and a second canopy covering two dual dispenser islands is located south of the station building. The site is paved with asphalt and concrete. Figure 3 presents the site layout and features.

According to the most recent (2012) zoning map produced by the City of Washougal Community Development Department, the site is located within an area zoned as Town Center Core (TCC). This designation provides for mixed commercial and residential use in mid-rise buildings (City of Washougal 2009). This zoning designation is not expected to change in the foreseeable future.

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ARCO Facility No. 6008 212 15th Street Washougal, Washington

Land use adjacent to the site is commercial and residential. The site is bounded to the north by C Street, to the east by a vacant lot and two residential properties. The site is bounded to the south by B Street and a residential property and to the west by 15th Street and residential properties. Surrounding properties to the east and south are zoned TC-C and to the west across 15th Street are zoned Town Center West Village (TC-WV), which allows for residential and public uses (City of Washougal 2009).

1.2 Site Geology and Hydrogeology

The site is situated in the Willamette-Puget Trough, which is bordered by the Cascade Range to the east and the Pacific Coast Range to the west (Mundorff 1960). The site is located in a geographic area known as the Fourth Plains, where Pleistocene age alluvial deposits dominate the geology. These alluvial deposits form a layer ranging from a few feet to 200 feet in thickness. In regions where the alluvial beds are the thickest, groundwater drains out readily and the water table is deeper than in areas with thinner alluvial beds. The principal geologic formation in the region is the Troutdale formation, which consists primarily of sand and gravel in the upper member and silt and clay in the lower member (Mundorff 1960). The site elevation is approximately 50 feet above mean sea level, and the topography of the immediate area gently slopes toward the Columbia River, located approximately 0.2 miles to the south of the site.

Soil encountered during previous site investigations has generally consisted of sand and cobbles to the maximum depth explored of 16 feet below ground surface (bgs) (Sweet-Edwards, 1991). During the site investigations conducted by ARCADIS in 2011 and 2013, soils encountered were predominantly gravel with some sand and silt to a depth of 50 feet bgs.

1.3 Site History

In July 1989, four soil borings (B-1 through B-4) were installed by Brown and Caldwell on behalf of ARCO as part of a preliminary tank replacement assessment. The borings were installed adjacent to the first generation UST complex, which was located immediately north of the current UST cavity. Refusal was encountered at approximately 3 feet to 4 feet bgs in each of the borings. One soil sample was collected at 4 feet bgs from boring B-4. No total petroleum hydrocarbon (TPH) concentrations were detected in this sample. A photoionization detector (PID) was used to screen soil during boring installation. PID readings ranged from 18 to 190 ppm (Brown and Caldwell 1989). Historical soil analytical results are summarized in Table 1 and soil sample locations are presented on Figure 3.

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ARCO Facility No. 6008 212 15th Street Washougal, Washington

In January and February 1990, ARCO contracted Blakeley Construction, under the oversight of Sweet-Edwards/EMCON, to decommission two 4,000-gallon single walled steel construction gasoline USTs, two 6,000-gallon single walled steel construction gasoline USTs and associated product piping, and to install four new 10,000-gallon double walled fiberglass construction gasoline USTs. The former UST complex and the location south of the former UST complex (the new UST complex) were excavated to a depth of 16 feet bgs. The excavation was extended north of the former UST complex to construct a soil treatment gallery (Sweet Edwards/EMCON 1991).

Impacted soils encountered during the excavation were found within the boundaries of the former and new UST complexes and were stored on-site pending treatment in the soil treatment gallery. Groundwater was not encountered during site excavation activities. During decommissioning of the former USTs, a small hole was observed in one of the 4,000-gallon gasoline USTs and petroleum-impacted soil was encountered in the tank cavity. Petroleum odors were also observed during the excavation of product lines connected to the western-most dispenser pump (Sweet Edwards/EMCON 1991).

A total of nineteen soil samples were collected from the floor and sidewalls of the former UST pit, dispenser line trenches, and from impacted soils staged on-site prior to placement in the treatment gallery. Soil samples were analyzed for benzene, toluene, ethylbenzene and total xylenes (BTEX), total petroleum hydrocarbons-gasoline range organics (GRO), and total petroleum hydrocarbons-diesel range organics (DRO). Soil samples collected from the excavation floor and sidewalls and from piping trenches did not contain petroleum constituents at concentrations exceeding MTCA Method A CULs. Soil samples collected from the impacted soil stockpile that was later placed in the treatment gallery contained concentrations of GRO, toluene, ethylbenzene and total xylenes above MTCA Method A CULs. Benzene and DRO were not detected in impacted soil stockpile samples. The site was entered into the Ecology Leaking Underground Storage Tank (LUST) database in January 1990 during UST decommissioning activities (Sweet Edwards/EMCON 1991).

Approximately 60 cubic yards of soil were excavated from the tank cavity and placed in an on-site treatment gallery located immediately north of the UST complex. After placement of the excavated soil in the treatment gallery, five vertical perforated polyvinyl chloride (PVC) pipes (VP-1 through VP-5) and two 20-foot long, 4-inch diameter perforated PVC collector pipes were installed. The PVC collector pipes were placed horizontally at 9 feet bgs. A steel plate was installed between the treatment gallery and the new UST cavity to prevent potential migration of petroleum

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington constituents. The treatment gallery was capped with layered geotextile and visquene and was repaved with asphalt. Following Ecology approval, a VES consisting of one Rotron DR 505 blower and two Westates VSC-200 carbon canisters was connected to the treatment gallery infrastructure and started by EMCON in January 1993. The VES operated until August 1993 when the system was shut down pending confirmation sampling (EMCON 1994).

Confirmation sampling was conducted by EMCON in 1994 with the installation of six soil borings in the treatment gallery. Two of the borings encountered shallow refusal. However, shallow (4 feet), intermediate (10 feet) and deep (14 feet) soil samples were collected from four of the completed borings. Soil samples were submitted for analysis of GRO, BTEX and total lead. No analyzed constituents were detected above MTCA Method A CULs (EMCON 1994). The status of the LUST case was updated to “Reported Cleaned Up” in June 1995 following the collection of the confirmatory samples from the treatment gallery. However, a NFA determination was not made by Ecology at that time (Delta 2007).

In March 1998, two soil samples were collected by Pinnacle Environmental Solutions (Pinnacle) south of the western-most dispenser pump when evidence of petroleum impacts was noted during the installation of a pay-at-the-pump machine. The soil samples contained concentrations of total xylenes and GRO above MTCA Method A CULs (Pinnacle 1998).

The property was sold by ARCO in January 2007 to the current property owner, Kamel Kanso (Delta 2007). In February 2007, Meng-Hannon Construction of Portland, Oregon was retained by the current owner to conduct facility upgrades, including the replacement of the six dispenser pumps. In April 2007, Delta collected soil samples at depths ranging from 3 feet to 6 feet bgs beneath the dispenser pumps. Soil samples were analyzed for BTEX, methyl tertiary butyl ether (MTBE), GRO and total lead. Benzene concentrations exceeded MTCA Method A CULs in two of the soil samples (D-3-3.5 and D-4-3.5), which were both collected from the western-most dispenser pump (Delta 2007).

In January 2011, ARCADIS installed three soil borings (SB-1 through SB-3) at the site. Nine soil samples and one grab groundwater sample were collected and analyzed for GRO, DRO, total petroleum hydrocarbons-heavy oil range organics (HO), BTEX, MTBE, and lead. Additionally, the grab groundwater sample was analyzed for dissolved lead. Lead was detected in each of the soil samples collected, but the concentrations were below MTCA Method A CULs. Concentrations of DRO, HO, and

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ARCO Facility No. 6008 212 15th Street Washougal, Washington total lead were detected in the grab groundwater sample collected from SB-3. HO and total lead were detected at concentrations exceeding MTCA Method A CULs (550 micrograms per liter [µg/L] and 108 µg/L, respectively). The HO detections were likely not associated with petroleum impacts but the result of interference caused by naturally occurring organic material and organic acids sorbed to the soil present in the turbid sample. Total lead was likely a result of lead present in the soil within the turbid sample. Dissolved lead was not detected above laboratory reporting limits. Remaining analytes were not detected above laboratory reporting limits. Historical soil analytical results are summarized in Table 1, sample locations are presented on Figure 3, and groundwater results are summarized in Table 2.

2 Potential Constituents of Concern

According to MTCA 173-340-900, Table 830-1 “Required Testing for Petroleum Releases”, several potential COCs are associated with the current and past use of the site. Potential COCs associated with the past storage and distribution of gasoline at the property include:

o GRO o BTEX o 1,2-dibromoethane (EDB) o 1,2-dichloroethane (EDC) o MTBE o Total lead o Naphthalene

During historic site characterization activities, the following COCs were identified in soil at concentrations exceeding MTCA Method A soil CULs: benzene, total xylenes and GRO.

Toluene, ethylbenzene, MTBE, and total lead were not detected above laboratory reporting limits in the samples analyzed for these constituents. EDB, EDC and naphthalene were not analyzed in historic soil samples.

During the 2011 site investigation, soil samples contained concentrations of total lead above the laboratory reporting limit. However, the total lead concentrations did not exceed the MTCA Method A soil CUL. The grab groundwater sample collected from soil boring SB-1 during the 2011 site investigation contained DRO, HO and total lead, with concentrations of HO and total lead exceeding the associated MTCA Method A

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ARCO Facility No. 6008 212 15th Street Washougal, Washington groundwater CULs. The DRO and HO concentrations measured in groundwater are likely not associated with petroleum but the result of interference caused by naturally occurring organic material and organic acids sorbed to the soil that was present in the turbid grab groundwater sample. This conclusion is supported by the fact that petroleum hydrocarbons outside of the gasoline range have not been detected in other samples collected at the site. Additionally, both the current and past property owners have confirmed that diesel fuel has never been stored or dispensed at the site, further supporting the conclusion that DRO and HO detections are the result of biogenic interference. Soil and groundwater samples did not contain concentrations of other COCs above the laboratory reporting limit.

Groundwater samples collected from groundwater monitoring wells MW-1 through MW-3 installed during 2013 site investigation did not contain TPH and VOC concentrations above laboratory reporting limits..

In summary, COCs previously identified in historical site investigations are currently at levels below the MTCA Method A groundwater CULs with the exception of total lead. Total lead was detected above the laboratory reporting limit but below MTCA Method A CUL in groundwater samples collected from MW-1 and MW-2. Total lead was detected above MTCA Method A CUL in the groundwater sample collected from MW-3 (22.5 µg/L). Total lead in the groundwater sample is attributable to the naturally occurring lead in the soil particles present in the turbid sample. Water quality measurements collected during low flow purging are presented in Appendix E. The average naturally occurring lead concentration found the Portland Basin, located across the Columbia River (DEQ 2013) from the site, is 27.2 mg/kg. Clark County, Washington has a 90th percentile background lead concentration of 20.4 mg/kg in soil (Ecology 1994).

3 Conceptual Site Model

Possible pathways associated with potential exposures to petroleum hydrocarbon constituents detected in soil and groundwater at the site are described below. The conceptual site model (CSM), or exposure evaluation flowchart, illustrated on Figure 4, provides a summary of the relationships between primary sources (i.e. release mechanisms), secondary sources (i.e. exposure media), transport mechanisms, exposure pathways, and potential current and future receptors. Details of the CSM for the site are provided in the following sections.

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ARCO Facility No. 6008 212 15th Street Washougal, Washington

3.1 Potential Constituent Sources

COCs in soil include benzene, total xylenes and GRO, as these constituents were historically present above MTCA Method A soil CULs in shallow soil samples collected at the site. However, recent soil investigation activities show that current concentrations of COCs are below laboratory reporting limits. Historically, COCs in groundwater included DRO, HO and total lead, as these constituents were present at concentrations exceeding MTCA Method A groundwater CULs in a grab groundwater sample collected at the site. Current detections of COCs are either below Method A CULs or attributed to background soil concentrations not associated with station operations.

The primary source of COCs at the site includes the historic release of gasoline to soil from the former USTs, potential fuels spills, tank overfills, and leaks from the fuel dispensers and associated piping. A hole was observed in one of the former gasoline USTs during UST decommissioning activities in 1990. Impacted soil was excavated and treated onsite. Detections of GRO and/or benzene exceeding MTCA Method A soil CULs have also been reported in samples collected near the surface at the westernmost dispenser island. The GRO concentration in a 1990 piping trench sample (PR-1 at 5.5 feet bgs; 35 mg/kg) did not exceed cleanup guidelines at the time it was sampled (Sweet Edwards/EMCON 1991). However, the concentration exceeds the current MTCA Method A soil CUL of 30 mg/kg.

The primary source of groundwater COCs at the site is not known. No known diesel and/or heavy oil range hydrocarbon release has occurred at the site. The current and previous property owner operated the site as a gasoline-only service station.

Potential secondary sources are considered to be residual COC mass that has sorbed onto surface soil (<15 feet bgs) as a result of historical releases. Subsurface soils (>15 feet bgs) have not been found to contain hydrocarbon impacts; therefore, subsurface soils are not considered for this CSM.

3.2 Potential Transport Mechanisms and Receptors

The site is currently paved with asphalt and concrete and is expected to remain the same in the future; there are currently no known plans for redevelopment of the site. The pavement serves as a barrier between potential receptors and surface (<15 feet bgs) soil. Although hydrocarbon-impacted soil had historically been identified at the former UST basin, impacted soil was excavated down to 16 feet bgs and confirmation

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ARCO Facility No. 6008 212 15th Street Washougal, Washington soil samples collected from the bottom and sidewalls of the UST basin indicated that hydrocarbon-impacted soil is no longer present in this area. Hydrocarbon-impacted soil had also been identified in surface soil at the westernmost dispenser island in 1998 and 2007. However, samples collected in January 2011 and April 2013 to further characterize soil in the vicinity of the formerly indicated that petroleum hydrocarbon impacts are no longer present at concentrations exceeding the applicable CULs.

A direct contact transport mechanism is unlikely. Therefore, potential incidental ingestion of and dermal contact with soil for current and future on-site commercial workers is unlikely; these exposure pathways are not expected to be complete. In addition, inhalation of fugitive dust by potential onsite and offsite receptors, including commercial workers and offsite residents, is unlikely and the exposure pathways are incomplete. Future site construction workers may be directly exposed to subsurface soil in the event of site redevelopment; however, current COC concentrations in soil are below CULs. Exposure risk associated with the pathway id not considered significant.

Leaching of residual phase petroleum hydrocarbons in soil to groundwater beneath the site may lead to exposures through tap water ingestion, dermal contact with tap water and inhalation of volatile organic compounds (VOCs) in tap water to potential on-site and off-site receptors. Current COC concentrations in groundwater are below CULs and therefore beneficial uses of groundwater have not been impacted by station operations

Another potential transport mechanism at the site is volatilization of constituents in soil and/or groundwater to outdoor air and/or the indoor air of current and future on-site buildings, or air within a trench used by future onsite construction/utility workers. These exposure pathways are not likely to be complete because historically impacted soil in the UST basin was over-excavated to 16 feet bgs and no soil impacts were identified in confirmation soil samples. Additionally, individual VOCs were either not detected above laboratory reporting limits in the groundwater samples collected in January 2011and April 2013, or were detected at concentrations below MTCA-A groundwater CULs. Moreover, historical petroleum hydrocarbon-impacted soil has not been located beneath the current station building, redevelopment of the site is not planned for the future, and possible residual petroleum hydrocarbon impacts are contained on site. Therefore, current and future inhalation of COCs in outdoor air or indoor air by current and future onsite and offsite receptors is not considered a potentially complete pathway.

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ARCO Facility No. 6008 212 15th Street Washougal, Washington

3.2.1 Ecological Receptors

Transport mechanisms potentially leading to the exposure of petroleum hydrocarbons to terrestrial ecological receptors are not considered present at the site. According to WAC 173-340-7491(1)(a-d), if the site meets any one of the four exclusion criteria, no further Terrestrial Ecological Evaluation (TEE) is necessary for the site. A determination was made that the site met one of the four exclusion criteria (Ecology 2010b). The site was therefore excluded from further evaluation under the TEE. The exclusion criterion met at the site is:

 WAC-173-340-7491(1)(c)(i) – “For sites contaminated with hazardous substances other than those specified in (c)(ii) of this subsection, there is less than 1.5 acres of contiguous undeveloped land on the site or within 500 feet of any area of the site.”

The site is currently paved with asphalt and concrete, and is located in a commercial and residential area of Washougal, Washington.

Since the site is devoid of ecological habitat and surface water is absent from the site, it is anticipated that ecological receptors are absent from the site. Furthermore, it is expected the site will remain a retail gas station in the future. Therefore, potential exposure pathways for terrestrial ecological receptors are not complete.

3.3 Potential Exposure Pathways

Based on the information presented in the previous sections, there are no potentially complete exposure pathways at the site. Therefore, residual concentrations of petroleum hydrocarbon constituents in soil and groundwater at the site do not pose a risk of adverse effects to human health and the environment.

4 Site Cleanup Levels

4.1 Method A Cleanup Levels

The Washington State Department of Ecology issued cleanup levels under MTCA. Method A defines CULs for common hazardous substances such as petroleum hydrocarbons. The MTCA Method A CULs may be used if they meet one of two criteria under WAC-173-340-704:

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ARCO Facility No. 6008 212 15th Street Washougal, Washington

 “Sites undergoing a routine cleanup action as defined in WAC 173-340-200;” or

 “Sites where numerical standards are available in this chapter or applicable state and federal laws for all indicator hazardous substances in the media for which the Method A cleanup level is being used.”

According to WAC-173-340-200 routine cleanup actions must meet the following criteria:

 “Cleanup standards for each hazardous substance addressed by the cleanup are obvious and undisputed, and allow for an adequate margin of safety for protection of human health and the environment;”

 “It involves an obvious and limited choice among cleanup action alternatives and uses an alternative that is reliable, has proven capable of accomplishing cleanup standards, and with which the department has experience;”

 “The cleanup action does not require preparation of an environmental impact statement; and”

 “The site qualifies under WAC 173-340-7491 for an exclusion from conducting a simplified or site-specific terrestrial ecological evaluation, or if the site qualifies for a simplified ecological evaluation, the evaluation is ended under WAC 173-340-7492(2) or the values in Table 749-2 are used.”

Historic investigations indicate petroleum hydrocarbons are the only COCs in soil and groundwater at the site and the site meets the criteria for undergoing a routine cleanup action. Furthermore, numerical standards for the COCs are available for soil and groundwater under MTCA Method A. Therefore, Method A CULs are appropriate and were used for the site. MTCA Method A CULs for COCs at the site are listed below, according to Table 720-1, Table 740-1 of the MTCA Statute and Regulation:

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ARCO Facility No. 6008 212 15th Street Washougal, Washington

Groundwater Soils Clean-up Clean-up Criteria Criteria Constituent (g/L)1,2 Constituent (mg/kg)3 GRO 800 / 1,000 4 GRO 30 / 100 4 DRO 500 DRO 2000 Benzene 5 Benzene 0.03 Toluene 1,000 Toluene 7 Ethylbenzene 700 Ethylbenzene 6 Total Xylenes 1,000 Total Xylenes 9 1 Clean-up Criteria based on Washington State MTCA Method A Cleanup Levels for Soils and Groundwater (MTCA Cleanup Regulation 173-340). 2 g/L =micrograms per liter. 3 mg/kg = milligrams per kilogram. 4 Method A Cleanup Levels for GRO are determined based on the presence of benzene.

Groundwater CULs were based on estimates of the most beneficial use for current and future site use. According to WAC-173-340-720(1)(a), “The department has determined that most sites use of ground water as a source of drinking water is the beneficial use requiring the highest quality of ground water and that exposure to hazardous substances through ingestion of drinking water and other domestic uses represents the reasonable maximum exposure.” Therefore, CULs established under MTCA Method A are protective for the beneficial use of groundwater as a current and/or future potable water source at the site.

Soil CULs were based on estimates of the reasonable maximum exposure scenario expected to occur given current and/or future use of the site. According to WAC-173- 340-740(1)(a), “The department has determined that residential land use is generally the site use requiring the most protective cleanup levels and that exposure to hazardous substances under residential land use conditions represents the reasonable maximum exposure scenario.” Therefore, CULs established under MTCA Method A are protective for the maximum exposure scenario for impacted soil, given current and/or future residential land use at the site.

4.2 Points of Compliance

The points of compliance are defined under MTCA as the point or points on a site where the selected cleanup levels are attained. Such points are further divided to include standard and conditional points of compliance. A standard point of compliance requires cleanup levels to be met for every location sampled, and therefore be met throughout the entire site. A conditional point of compliance requires cleanup levels to 11

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ARCO Facility No. 6008 212 15th Street Washougal, Washington be met only at some locations sampled, provided regulatory requirements are met according to WAC 173-340-720 through 173-340-760. Typically, sites that establish a conditional point of compliance place an environmental covenant on the affected properties, thereby limiting future uses of the properties (Ecology 2010).

Standard points of compliance were established for soil and groundwater at the site. The soil point of compliance is defined as throughout the soil profile and potentially below the water table across the site to a maximum depth of 15 ft bgs. The vertical and lateral boundaries of the soil point of compliance were designated to the site based on the protection of groundwater, as outlined in WAC 173-340-740(6)(b). The groundwater point of compliance is defined as throughout the site, from the uppermost depth of the saturated zone extending vertically to the lowest depth that could potentially be affected by the site. The vertical and lateral boundaries of the groundwater point of compliance were designated to the site based on the standard point of compliance for all sites, as outlined in WAC 173-340-720(8)(b).

4.3 Applicable Relevant and Appropriate Regulations

According to WAC 173-340-360(2), all cleanup actions under MTCA must comply with applicable state and federal laws. Such laws are defined under MTCA as including applicable relevant and appropriate regulations (ARARs). ARARs for the site include:

4.3.1 Federal

 Safe Drinking Water Act (National Primary and Secondary Drinking Water Regulations) (42 U.S.C. 300f, 40 CFR Part 141, 40 CFR Part 143) – Petroleum hydrocarbon cleanup levels are based on the beneficial use of groundwater as a current and/or future potable water source at the site.

 Resource Conservation and Recovery Act (RCRA) (42 U.S.C. 6901-6992, 40 CFR Part 260-268) – Investigation Derived Waste (IDW) and any other waste produced during activities at the site will be handled per RCRA regulations, and implemented according to WAC 173-303.

 Occupational Safety and Health Act (OSHA) (29 CFR 1910) – Site activities will be conducted in a manner compliant with OSHA standards and regulations.

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ARCO Facility No. 6008 212 15th Street Washougal, Washington

 Rules for Transport of Hazardous Waste (49 CFR 107, 171) – Hazardous waste generated at the site will be appropriately characterized to determine package, transportation and transportation requirements.

4.3.2 State

 Model Toxics Control Act (WAC 173-340) – Site activities will occur in accordance with MTCA Statutes and Regulations.

 Dangerous Waste Regulations (WAC 173-303) - Investigation Derived Waste (IDW) and any other waste produced during activities at the site will be handled per RCRA regulations, and implemented according to WAC 173-303.

 Minimum Standards for Construction and Maintenance of Wells, Regulation and Licensing of Well Contractors and Operators (RCW 18.104, WAC 173-160, 162) – Resource protection wells will be constructed and maintained according to the appropriate regulations.

 Washington Industrial Safety and Health Act, Chapter 296-62 WAC - Site activities will be conducted in a manner compliant with Washington Industrial Safety and Health Act standards and regulations.

 Maximum Environmental Noise Levels (WAC 173-60) – Site activities will be conducted at appropriate noise levels, according to WAC 173-60.

5 Compliance with MTCA Statutes and Regulations

5.1 Soil

Hydrocarbon impacts in soil near the UST basin were removed during excavation and remediation activities. Historic hydrocarbon impacts in soil near the westernmost dispenser island were limited to surface soil which is covered with asphalt. Hydrocarbon impacts were not detected in deeper soil samples. Assessment of the westernmost dispenser island area was conducted in 2011 with the installation of soil borings SB-1 through SB-3. Shallow and deep soil samples were collected on the north, west, and south sides of the westernmost dispenser island. None of the samples analyzed exceeded applicable MTCA Method A CULs.

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ARCO Facility No. 6008 212 15th Street Washougal, Washington

Soil samples collected from the former treatment gallery, former product pipeline location and the westernmost dispenser island during the 2013 site investigation did not contain concentrations of COCs above MTCA Method A CULs.

5.2 Groundwater

In January 2011, the grab groundwater sample collected from soil boring SB-3 had concentrations of HO and total lead exceeding the MTCA Method A CUL. HO concentrations are attributable to biogenic interference caused by naturally occurring material and organic acids sorbed to soil particles present in the sample. The sample was turbid and had not cleared after approximately 40 minutes of purging. Petroleum hydrocarbons outside of the gasoline range have not been identified in any other samples and diesel fuel has never been stored or dispensed at the site. Total lead concentrations are attributed to naturally occurring background concentrations in soil and is further supported by non-detect dissolved lead concentrations.

During the April 2013 site investigation, COCs in groundwater samples were not detected above MTCA Method A CULs collected except for total lead (MW-3). Total lead concentrations are attributed to naturally occurring background concentrations in soil present in the turbid groundwater sample collected at MW-3. Lead was not detected above reporting limits in the sample analyzed for dissolved lead. Water quality parameters collected during sampling are included in Appendix E.

5.3 Surface Waters

No known impacts to surface waters have occurred due to the past operation of the site as a retail gasoline station. Therefore, this media is considered in compliance with MTCA at the site.

5.4 Sediment

No known impacts to sediments have occurred due to the past operation of the site as a retail gasoline station. Therefore, this media is considered in compliance with MTCA at the site.

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

5.5 Soil Vapor

No known impacts to soil vapor have occurred due to the past operation of the site as a retail gasoline station. Therefore, this media is considered in compliance with MTCA at the site.

5.6 Ecological and Natural Resources

The site qualifies for an exclusion from the TEE according to WAC-173-340-7491, therefore ecological and natural resource related issues at the site are considered in compliance with MTCA.

5.7 Cultural and Archaeological Resources

No known impacts to cultural and archaeological resources have occurred due to retail gasoline station operations at the site. Therefore cultural and archaeological resource related issues at the site are considered in compliance with MTCA.

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

6 2013 Site Investigation Activities

This section describes the site investigation activities conducted in April 2013 at the request of Ecology in its response to ARCADIS’ 2011 request for a NFA determination (Appendix A). Specifically, the additional investigation was performed to further delineate potentially impacted soil and groundwater at locations with prior impacts or at potentially impacted locations that had not been adequately sampled during previous site investigations. Between April 8 and April 11, 2013, ARCADIS mobilized to the site following public and private utility locates to perform site investigation activities.

6.1 Utility Clearance

Prior to initiating drilling activities, underground utilities, and other potential subsurface obstructions near the proposed boring locations were located and marked. ARCADIS contacted the Northwest Utility Notification Center (NUNC) to provide mark-outs of public utilities near the proposed boring locations a minimum of 72 hours in advance of subsurface activities. Additionally, ARCADIS contracted Locates Down Under to conduct a private utility locate and ground penetrating radar (GPR) survey of the site to confirm the public utility mark-outs and identify any additional subsurface improvements in the vicinity of the proposed work areas. Potential utilities and structures were marked-out on the surface with paint. Finally, ARCADIS staff conducted a visual inspection of the site to identify potential utility lines. In this manner, ARCADIS established a minimum of three lines of evidence at each work zone prior to implementing drilling activities.

6.2 Soil Boring Installation

Between April 8 and 11, 2013, Cascade Drilling, LP of Clackamas, Oregon installed four soil borings (MW-1[SB-4], MW-2, MW-3 and SB-5) under the direct supervision of ARCADIS personnel. The locations of the soil borings are presented on Figure 5. Borehole SB-4 was advanced to a depth of 50 ft and was completed as monitoring well MW-1. MW-2 and MW-3 were advanced to a depth of 40 feet and completed as monitoring wells. SB-5 was advanced to a depth of 10 ft. Following vacuum clearance, the soil borings were installed using a track mounted RotoSonic 17-S drill rig. The soil boring installation logs are presented in Appendix B.

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

6.3 Soil Screening and Lithology

During drilling, soil samples were collected continuously for lithologic documentation. Field screening using a PID was conducted at approximately 2 foot intervals where soil recovery was sufficient. Field screening was conducted by placing a portion of each soil sample in a re-sealable plastic bag. The collected soil was broken up and allowed to rest for approximately 20 minutes. The head space within the bag was then tested for total organic vapor, measured in parts per million (ppm), by inserting the polyvinyl tubing of the PID into the bag. The PID results are included on the attached boring logs (Appendix B). PID field screening did not indicate the presence of hydrocarbons in any of the screened samples.

Lithologic data indicate that the subsurface material is primarily comprised of gravel with some coarse sand and silt, which contains cobbles and boulders larger than 1 foot in diameter to a depth of 40 feet bgs. Groundwater was observed between 29 feet and 30 feet bgs at the boring locations. No odors or visual evidence of petroleum hydrocarbon impacts to soil or groundwater were observed during drilling.

6.4 Soil Sample Collection

Between April 8 and 11, 2013, at least two soil samples were collected from each borehole for chemical analysis:

 One sample was collected at each boring between 4.5 feet and 7 feet bgs where impacts have historically been observed

 One sample was collected at each boring between 29.5 feet and 33 feet bgs immediately above the groundwater table

 One sample was collected from an unsaturated soil zone below an apparent perched groundwater table in soil boring MW-1(SB-4)

Where appropriate, soil samples were preserved in the field in accordance with United States Environmental Protection Agency (USEPA) Method 5035A and placed in pre- weighed, methanol and sodium bisulphate preserved 40 milliliter vials. Otherwise, soil samples were collected in new glass jars provided by the laboratory. The jars were sealed, labeled, and stored in a cooler packed with ice prior to submittal to Pace Analytical Services, Inc. (Pace) in Minneapolis, Minnesota, a Washington State certified laboratory. Standard chain of custody procedures were followed during

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington sample collection, transport and delivery to the laboratory. Soil samples were analyzed for the following constituents:

 GRO by Northwest Method NWTPH-Gx

 DRO and HO by Northwest Method NWTPH-Dx

 Volatile organic compounds (VOCs) by USEPA Method 8260

 Total lead by USEPA Method 6010

The laboratory analytical reports and chains-of-custody are included in Appendix C.

6.5 Monitoring Well Development

On April 15, 2013, each newly-installed groundwater monitoring well was developed to remove fine-grained sediment from the well screen and filter pack. Well development involved raising and lowering a surge block inside the screened interval of the well casing to force water into the formation and loosen sediment pulled from the formation into the well. After surging the monitoring wells, a submersible pump was used to remove water containing suspended sediment from the casing. Surging and purging of the wells was repeated until suspended sediments decreased to acceptable levels in accordance with ARCADIS standard operating procedures. A total of approximately 102 gallons of groundwater was purged from the monitoring wells during development. Monitoring well development logs are included in Appendix D.

6.6 Groundwater Sample Collection

On April 17, 2013, groundwater samples were collected from monitoring wells MW-1 through MW-3. Prior to sample collection, the wells were purged of a minimum of three well volumes using a Grundfos submersible pump and new disposable tubing. Field parameters including pH, temperature, electrical conductivity, turbidity, dissolved oxygen, and oxidation-reduction potential were collected during purging at each purge volume interval using a Horiba U-52 multi-parameter water quality meter equipped with a flow through cell. Samples were then collected using new disposable polyethylene bailers. Field data sheets are included in Appendix E.

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

Samples were collected in laboratory-provided bottles, placed in a cooler with ice, and submitted to Pace under standard chain-of-custody procedures. Groundwater samples were analyzed for the following constituents:

 GRO by Northwest Method NWTPH-Gx

 DRO and HO by Northwest Method NWTPH-Dx

 VOCs by USEPA Method 8260

 Total and dissolved lead by USEPA Method 6010

The laboratory analytical reports and chains-of-custody are included in Appendix C.

6.7 Investigation Derived Waste Management

Soil cuttings generated during drilling operations were containerized in 14 appropriately-labeled 55-gallon drums. Decontamination water and purge water generated during drilling operations, well development, and groundwater sample collection were containerized in five appropriately-labeled 55-galllon drums. Investigation-derived soil and water generated during the site investigation was transported to Cemex in Everett Washington and Marine Vacuum Services in Seattle Washington, respectively.

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

6.8 Results

This section summarizes results of the soil and groundwater sampling activities.

6.8.1 Soil Analytical Results

Soil analytical results are compared to the MTCA Method A CULs for unrestricted land uses presented in Table 740-1 of Chapter 173-340 WAC. Soil samples were analyzed for GRO, DRO, HO, VOCs and total lead. Total lead, expected to be naturally occurring, was detected below the MTCA Method A CUL (250 mg/kg) in every soil sample at concentrations ranging from 5.8 (mg/kg) and 16.9 mg/kg. Acetone was detected in a soil sample collected from SB-4 and is likely a laboratory byproduct due to the reaction of the soil matrix with the sodium bisulfate present in the USEPA Method 5035 Terracore sampling kits. Presently, acetone does not have an established CUL. No other analyzed constituents were observed in the soil samples above the laboratory method detection limits. A summary of soil analytical results is presented in Table 3 and on Figure 5. Chain-of-custody documentation and the laboratory analytical reports prepared by Pace are included in Appendix C.

6.8.2 Groundwater Analytical Results

Three groundwater samples and one duplicate sample were analyzed for VOCs, GRO, DRO, HO, and total and dissolved lead. The results are compared to the MTCA Method A CULs presented in Table 720-1 of Chapter 173-340 WAC. Total lead was detected below the MTCA Method a CUL of 15 µg/L in the sample collected from MW- 2 (11 µg/L) and in exceedance of the MTCA Method a CUL in the sample collected at MW-3 (23 µg/L). While the total lead concentration at MW-3 exceeds the MTCA Method A CUL, high turbidity in groundwater samples and natural occurrence of lead in the soil support the conclusion that the lead was present in the soil and not in the groundwater. Dissolved lead was not detected above the laboratory reporting limit in the submitted samples. A summary of groundwater analytical results is presented in Table 2 and on Figure 6. Chain-of-custody documentation and the laboratory analytical reports prepared by Pace are included in Appendix C.

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

7 Current Site Conditions

7.1 Soil

Soil sample PR-1 collected in February 1990 near the central dispenser island had a concentration of GRO exceeding the MTCA Method A CUL. Soil samples collected in February 1990 from the impacted soil stockpile that was later placed in the treatment gallery contained concentrations above MTCA Method A CULs of GRO (CS-2 through CS-6), toluene (CS-4 through CS-6), ethylbenzene and total xylenes (CS-3 through CS-6). Confirmation soil samples were collected from soil borings B1, B2, B3 and B5 installed in the treatment gallery following vapor extraction between January and August 1993. The confirmation samples did not contain concentrations of BTEX and GRO above laboratory reporting limit (except sample B5-6-8 that had GRO concentration of 5 mg/kg which is below MTCA Method A CUL). Soil samples Sample- 1 and Sample-2 collected near the westernmost fuel dispenser island in 1998 had concentrations of GRO and total xylenes exceeding MTCA Method A CULs.

In April 2007, soil samples, D-3-3.5 and D-4-3.5, collected from below the western most fuel dispensers had concentrations of benzene exceeding the MTCA Method A CUL. However, the samples, D-1-6.0 and D-2-6.0, collected below the central dispenser island did not have concentrations of COCs exceeding MTCA Method A CULs. Analysis of soil samples collected from the soil borings installed during the 2011 and 2013 site investigations near the former UST pit, former treatment gallery, and central and western most fuel dispensers did not identify COCs previously identified at these locations above the laboratory reporting limits.

7.2 Groundwater

The grab groundwater sample collected from boring SB-3 during the 2011 site investigation had HO and total lead concentrations exceeding the MTCA Method A CULs. The HO detections were likely not associated with petroleum impacts but the result of interference caused by naturally occurring organic material and organic acids sorbed to the soil present in the turbid sample. Also, since the site has a history of gasoline USTs only, DRO and HO impacts are not expected at the site. The groundwater sample collected during the 2013 site investigation from monitoring well MW-3, near the previous grab groundwater location (SB-3), did not have concentrations of COCs previously identified at the site above laboratory reporting limits. Groundwater samples collected from monitoring well MW-1, located in the

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington former soil treatment facility, and MW-2, located near the central fuel dispenser, did not have concentrations of COCs above laboratory reporting limits.

8 Conclusion and No Further Action Request

ARCADIS has completed the additional site investigation for ARCO Facility No. 6008 located at 212 15th Street in Washougal, Washington as requested by Ecology. ARCADIS installed four soil borings, with three completed as groundwater monitoring wells, to delineate the extent of soil and groundwater impacts previously identified in the former UST pit and near the fuel dispensers west of the station building. Lead detected in the soil samples is within the range of background lead found in the the area and below MTCA Method A CULs (Ecology 1994). Total lead detected in the groundwater samples is attributable to lead in soil as indicated by the high turbidity of the groundwater samples and is not indicative of petroleum impacts at the site.

COCs previously identified from historical site investigation activities, including GRO and BTEX, were not identified in any of the soil or groundwater samples collected during the 2013 site investigation. Therefore, potential exposures to residual concentrations of petroleum hydrocarbon constituents in soil and groundwater at the site are not expected to pose adverse effects to human health and the environment. As such, ARCADIS requests a NFA determination for the site.

Assessment Report and No Further Action Request

ARCO Facility No. 6008 212 15th Street Washougal, Washington

9 References

ARCADIS 2011. Closure Request, BP Facility No. 6008 (Ecology File No. 46212644; UST ID 8800), 212 15th Street, Washougal, Washington. June 30. Brown and Caldwell 1989. Draft Preliminary Tank Replacement Assessment, ARCO Service Station No. 6008, Washougal, Washington. August 30. Delta 2007. Environmental Oversight During Retail Facility Upgrade Activities: ARCO Facility No. 6008, 212 15th Street, Washougal, Washington. October 25. EMCON 1994. VES Monitoring and Confirmation Sampling – ARCO Station 6008, 212 15th Street, Washougal, Washington. May 25. Mundorff, M.J. 1960. Geology and Groundwater Resources of Clark County, Washington, United States Geological Survey. Oregon Department of Environmental Quality (DEQ) 2013. Development of Oregon Background Metals Concentrations in Soil, March.

Pinnacle 1998. Laboratory Results for Soil Samples from ARCO Station 6008, Washougal, Washington. June 5. Sweet-Edwards/EMCON 1991. UST Decommissioning and Vapor Treatment Gallery Construction: ARCO Service Station 6008, Washougal, Washington. September 10. Washington State Department of Ecology (Ecology) 1994. Natural Background Soil Metal Concentrations in Washington State, Toxics Cleanup Program, Olympia Washington. October. Washington State Department of Ecology 2007. Chapter 173-340 Washington Administrative Code, Model Toxics Control Act. Updated October 12, 2007.Washington State Department of Ecology (Ecology) 2010. Draft Guidance for Remediation of Petroleum Contaminated Sites. Publication No. 10-09-057. December, 2010.

Tables

Table 1

Historical Soil Analytical Results Site Investigation Report and No Further Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

All analytical results are presented in milligrams per kilogram (mg/kg) Sample Depth Date Collected Benzene Toluene Ethylbenzene Total Xylenes MTBE GRO DRO Total Lead Identification (feet bgs) MTCA Method A Cleanup Levels (mg/kg) 0.03 7 6 9 0.1 100/30 2,000 250 B-1 0.7 7/24/1989 ------B-2 1.5 7/24/1989 ------B-3 1.5 7/24/1989 ------B-3 2.5 7/24/1989 ------B-4 2 7/24/1989 ------<10a -- -- SW-15 15 1/31/1990 <0.20 <0.50 <0.20 <0.40 -- <10 <20 -- E-T2-5 5 2/1/1990 <0.20 <0.50 <0.20 1.7 -- <10 <20 -- W-T2-10 10 2/2/1990 <0.20 <0.50 <0.20 <0.40 -- <10 <20 -- Z-A 16 2/2/1990 <0.20 <0.50 <0.20 <0.40 -- <10 <20 -- Z-B 16 2/2/1990 <0.20 <0.50 <0.20 <0.40 -- <10 <20 -- Z-C 16 2/2/1990 <0.20 <0.50 <0.20 <0.40 -- <10 <20 -- CS-1b NA 2/6/1990 <0.1 <0.2 <0.1 Trace (0.2) -- <10 <20 -- CS-2b NA 2/6/1990 <0.1 <0.2 <0.1 4 -- 42 <20 -- CS-3b NA 2/7/1990 <0.05 <0.5 100 7,940 -- 157 -- -- CS-4b NA 2/7/1990 <0.05 6,690 4,250 195,000 -- 1,670 -- -- CS-5b NA 2/8/1990 <0.05 190 180 1,950 -- 314 -- -- CS-6b NA 2/8/1990 <0.05 620 1,080 110,000 -- 843 -- -- SW-W-9 9 2/8/1990 <0.05 <0.05 <0.05 <0.05 -- <1 <0.5 -- SW-E-6 6 2/8/1990 <0.05 <0.05 <0.05 <0.05 -- <1 <0.5 -- PR-1 5.5 2/14/1990 <0.05 0.00074 0.00058 0.00532 -- 35 -- -- PR-2 3 2/14/1990 <0.05 <0.05 <0.05 <0.05 -- <1 -- -- PR-3 3 2/14/1990 <0.05 <0.05 <0.05 <0.05 -- <1 -- -- PR-4 3 2/14/1990 <0.05 <0.05 <0.05 0.000230 -- 3 -- -- B1-3.5-4 3.5-4 1/6/1994 <0.05 <0.1 <0.1 <0.1 -- <5 -- 6 B1-4-6 4-6 1/6/1994 ------B1-6-8 6-8 1/6/1994 ------B1-8-10 8-10 1/6/1994 ------B1-10-12 10-12 1/6/1994 <0.05 <0.1 <0.1 <0.1 -- <5 -- 18

WA-6008 Site Investigation Report and Closure Request 1 of 10 ARCADIS 2013 Table 1

Historical Soil Analytical Results Site Investigation Report and No Further Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

All analytical results are presented in milligrams per kilogram (mg/kg) Sample Depth Date Collected Benzene Toluene Ethylbenzene Total Xylenes MTBE GRO DRO Total Lead Identification (feet bgs) MTCA Method A Cleanup Levels (mg/kg) 0.03 7 6 9 0.1 100/30 2,000 250 B1-12-14 12-14 1/6/1994 <0.05 <0.1 <0.1 <0.1 -- <5 -- 8 B1-14-15 14-15 1/6/1994 ------B2-2-4 2-4 1/6/1994 <0.05 <0.1 <0.1 0.2 -- <5 -- 14 B2-6-8 6-8 1/6/1994 ------B2-10-12 10-12 1/6/1994 <0.05 <0.1 <0.1 <0.1 -- <5 -- <3 B2-13.5-14 13.5-14 1/6/1994 ------B3-2-4 2-4 1/6/1994 <0.05 <0.1 <0.1 0.2 -- <5 -- 37 B5-2.5-4.5 2.5-4.5 1/6/1994 ------B5-6-8 6-8 1/6/1994 <0.05 <0.1 <0.1 <0.1 -- 5 -- <3 B5-10-12 10-12 1/6/1994 <0.05 <0.1 <0.1 <0.1 -- <5 -- 7 B5-14-16 14-16 1/6/1994 ------Sample-1 0.4-0.6 3/31/1998 <0.500 <0.500 <0.500 25.8 -- 513 -- -- Sample-2 0.4-0.6c 3/31/1998 <0.0500 <0.0500 <0.0500 0.0874 -- 6.69 -- -- D-1-6.0 6 4/10/2007 <0.0233 <0.117 <0.117 <0.350 <0.583 <5.83 -- 25.0 D-2-6.0 6 4/10/2007 <0.0214 <0.107 <0.107 0.526 <0.534 7.50 -- 62.3 D-3-3.5 3.5 4/10/2007 0.429 0.521 <0.113 <0.340 <0.566 <5.66 -- 56.7 D-4-3.5 3.5 4/10/2007 0.102 0.126 <0.114 <0.341 <0.568 <5.68 -- 64.3 D-5-4.0 4 4/10/2007 <0.0201 <0.0502 <0.0502 <0.100 <0.100 <5.02 -- 9.0 D-6-4.0 4 4/10/2007 <0.0269 0.361 0.167 1.14 <0.0896 9.06 -- 12.3 SB-1-3 3 - 5 1/27/2011 <0.0029 <0.0029 <0.0029 <0.0088 <0.0029 <17.2 -- 3.8 SB-1-8 8 - 10 1/27/2011 <0.0038 <0.0038 <0.0038 <0.0113 <0.0038 <6.8 -- 3.4 SB-2-3 3 - 5 1/27/2011 <0.0027 <0.0027 <0.0027 <0.0082 <0.0027 <6.4 -- 2.9 SB-2-8 8 - 10 1/27/2011 <0.0034 <0.0034 <0.0034 <0.0103 <0.0034 <7.8 -- 4.3 SB-2-19.5 19 - 19.5 1/27/2011 <0.0021 <0.0021 <0.0021 <0.0063 <0.0021 <4.4 -- 3.8 SB-3-3 3 - 4 1/28/2011 <0.0023 <0.0023 <0.0023 <0.0069 <0.0023 <5.7 -- 4.4 SB-3-8 8 - 9 1/28/2011 <0.0033 <0.0033 <0.0033 <0.0098 <0.0033 <8.4 -- 6.2 SB-3-30 30 - 30.5 1/28/2011 <0.0024 <0.0024 <0.0024 <0.0071 <0.0024 <4.7 -- 5.5 SB-3-40 39 - 40 1/28/2011 <0.0030 <0.0030 <0.0030 <0.0091 <0.0030 <4.9 -- 3.5

WA-6008 Site Investigation Report and Closure Request 2 of 10 ARCADIS 2013 Table 1

Historical Soil Analytical Results Site Investigation Report and No Further Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

Notes < = Concentration is below specified laboratory reporting limit presented in Table 740-1 of Chapter 173-340 of the Washington Administrative Code (WAC) a = Result presented was for total petroleum hydrocarbons. b = The specific depth of this sample was not reported; however, Figure 2 and Photograph 3 of Pinnacle's 1998 letter report illustrate the sample location below the concrete surface. bgs = below ground surface Concentrations compared to the Model Toxics Control Act (MTCA) Method A soil cleanup levels for unrestricted land uses DRO = Total petroleum hydrocarbons - diesel range organics analyzed via Northwest Method NWTPH-Dx GRO = Total petroleum hydrocarbons - gasoline range organics analyzed via Northwest Method NWTPH-Gx, Washington Department of Ecology Method WTPH-G mg/kg = milligrams per kilogram MTBE = Methyl tertiary butyl ether TPH = Total petroleum hydrocarbons Benzene, toluene, ethylbenzene, total xylenes and MTBE analyzed via United States Environmental Protection Agency (USEPA) Method 8260B or 5030/8020. MTCA Method A Cleanup level for GRO is 100 mg/kg for gasoline mixture without benzene and with the total of ethylbenzene, toluene and total xylenes are less than 1% of gasoline. MTCA Method A Cleanup level for GRO is and 30 mg/kg for all other gasoline mixtures.

Total lead analyzed by USEPA Method 6020 or 7420. Bold = Chemical detected at a concentration above the LRL but below MTCA Method A cleanup level Bold Highlighted = Results are above the MTCA Method A cleanup level

WA-6008 Site Investigation Report and Closure Request 3 of 10 ARCADIS 2013 Table 2

Groundwater Analytical Results - January 2011 and April 2013 Site Investigation Report and No Futher Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

All analytical results are presented in micrograms per liter (μg/L) Sample Location MTCA SB-3-W MW-1 MW-2 MW-3 Cleanup Analyte Levels 1/28/2011 4/17/2013 4/17/2013 4/17/2013 (µg/L)

Select VOCs, TPH and Lead Benzene 5 <0.20 < 1.0 < 1.0 < 1.0 Toluene 1,000 <1.0 < 1.0 < 1.0 < 1.0 Ethylbenzene 700 <1.0 < 1.0 < 1.0 < 1.0 Total Xylenes 1,000 <3.0 < 3.0 < 3.0 < 3.0 MTBE 20 <1.0 < 1.0 < 1.0 < 1.0 GRO 1000/800 <50.0 < 100 < 100 < 100 DRO 500 110 < 430 < 430 < 430 HO 500 550 < 430 < 430 < 430 Total Lead 15 108 < 10.0 11.3 22.5 Dissolved Lead 15 <10.0 < 10.0 < 10.0 < 10.0 Other VOCs 1,1,1,2-Tetrachloroethane -- -- < 1.0 < 1.0 < 1.0 1,1,1-Trichloroethane 200 -- < 1.0 < 1.0 < 1.0 1,1,2,2-Tetrachloroethane -- -- < 1.0 < 1.0 < 1.0 1,1,2-Trichloroethane -- -- < 1.0 < 1.0 < 1.0 1,1,2-Trichlorotrifluoroethane -- -- < 1.0 < 1.0 < 1.0 1,1-Dichloroethane -- -- < 1.0 < 1.0 < 1.0 1,1-Dichloroethene -- -- < 1.0 < 1.0 < 1.0 1,1-Dichloropropene -- -- < 1.0 < 1.0 < 1.0 1,2,3-Trichlorobenzene -- -- < 1.0 < 1.0 < 1.0 1,2,3-Trichloropropane -- -- < 4.0 < 4.0 < 4.0 1,2,4-Trichlorobenzene -- -- < 1.0 < 1.0 < 1.0 1,2,4-Trimethylbenzene -- -- < 1.0 < 1.0 < 1.0 1,2-Dibromo-3-chloropropane -- -- < 4.0 < 4.0 < 4.0 1,2-Dichlorobenzene -- -- < 1.0 < 1.0 < 1.0 1,2-Dichloroethane 5 -- < 1.0 < 1.0 < 1.0 1,2-Dichloropropane -- -- < 4.0 < 4.0 < 4.0 1,3,5-Trimethylbenzene -- -- < 1.0 < 1.0 < 1.0 1,3-Dichlorobenzene -- -- < 1.0 < 1.0 < 1.0 1,3-Dichloropropane -- -- < 1.0 < 1.0 < 1.0 1,4-Dichlorobenzene -- -- < 1.0 < 1.0 < 1.0 2,2-Dichloropropane -- -- < 4.0 < 4.0 < 4.0 2-Butanone -- -- < 5.0 < 5.0 < 5.0 2-Chlorotoluene -- -- < 1.0 < 1.0 < 1.0 4-Chlorotoluene -- -- < 1.0 < 1.0 < 1.0 Acetone -- -- < 20.0 < 20.0 < 20.0 Allyl chloride -- -- < 4.0 < 4.0 < 4.0 Bromobenzene -- -- < 1.0 < 1.0 < 1.0

WA-6008 Site Investigation Report and Closure Request 4 of 10 ARCADIS 2013 Table 2

Groundwater Analytical Results - January 2011 and April 2013 Site Investigation Report and No Futher Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

All analytical results are presented in micrograms per liter (μg/L) Sample Location MTCA SB-3-W MW-1 MW-2 MW-3 Cleanup Analyte Levels 1/28/2011 4/17/2013 4/17/2013 4/17/2013 (µg/L)

Bromochloromethane -- -- < 1.0 < 1.0 < 1.0 Bromoform -- -- < 4.0 < 4.0 < 4.0 Bromomethane -- -- < 4.0 < 4.0 < 4.0 Carbon tetrachloride -- -- < 1.0 < 1.0 < 1.0 CFC-11 -- -- < 1.0 < 1.0 < 1.0 CFC-12 -- -- < 1.0 < 1.0 < 1.0 Chlorobenzene -- -- < 1.0 < 1.0 < 1.0 Chloroethane -- -- < 1.0 < 1.0 < 1.0 Chloroform -- -- < 1.0 < 1.0 < 1.0 Chloromethane -- -- < 4.0 < 4.0 < 4.0 cis-1,2-Dichloroethene -- -- < 1.0 < 1.0 < 1.0 cis-1,3-Dichloropropene -- -- < 4.0 < 4.0 < 4.0 Cumene -- -- < 1.0 < 1.0 < 1.0 Dibromochloromethane -- -- < 1.0 < 1.0 < 1.0 Dibromomethane -- -- < 4.0 < 4.0 < 4.0 Dichlorobromomethane -- -- < 1.0 < 1.0 < 1.0 Dichlorofluoromethane -- -- < 1.0 < 1.0 < 1.0 Diethyl ether (Ethyl ether) -- -- < 4.0 < 4.0 < 4.0 Ethylene dibromide 0.01 -- < 1.0 < 1.0 < 1.0 Hexachlorobutadiene -- -- < 5.0 < 5.0 < 5.0 Methyl isobutyl ketone -- -- < 5.0 < 5.0 < 5.0 Methylene Chloride -- -- < 4.0 < 4.0 < 4.0 Naphthalene 160 -- < 4.0 < 4.0 < 4.0 n-Butylbenzene -- -- < 1.0 < 1.0 < 1.0 n-Propylbenzene -- -- < 1.0 < 1.0 < 1.0 p-Isopropyltoluene -- -- < 1.0 < 1.0 < 1.0 sec-Butylbenzene -- -- < 1.0 < 1.0 < 1.0 Styrene -- -- < 1.0 < 1.0 < 1.0 tert-Butylbenzene -- -- < 1.0 < 1.0 < 1.0 Tetrachloroethene 5 -- < 1.0 < 1.0 < 1.0 Tetrahydrofuran -- -- < 10.0 < 10.0 < 10.0 trans-1,2-Dichloroethene -- -- < 1.0 < 1.0 < 1.0 trans-1,3-Dichloropropene -- -- < 4.0 < 4.0 < 4.0 Trichloroethene 5 -- < 1.0 < 1.0 < 1.0 Vinyl chloride 0.2 -- < 0.2 < 0.2 < 0.2

WA-6008 Site Investigation Report and Closure Request 5 of 10 ARCADIS 2013 Table 2

Groundwater Analytical Results - January 2011 and April 2013 Site Investigation Report and No Futher Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

Notes -- = Cleanup level not established < = Concentration is below laboratory reporting limt µg/L = micrograms per liter MTBE = Methyl tertiary butyl ether DRO = Total petroleum hydrocarbons - diesel range organics analyzed by Northwest Method NWTPH-Dx GRO = Total petroleum hydrocarbons - gasoline range organics analyzed by Northwest Method NWTPH-Gx HO = Total petroleum hydrocarbons - heavy-oil range organics analyzed by Northwest Method NWTPH-Dx USEPA = United States Environmental Protection Agency TPH = Total petroleum hydrocarbons VOC = Volatile organic compound Concentrations compared to the Model Toxics Control Act (MTCA) Method A cleanup levels for groundwater presented in Table 720-1 of Chapter 173-340 of the Washington Administrative Code (WAC) MTCA Method A Cleanup level for GRO is 1000 µg/kg for groundwater without benzene and 800 µg/kg for groundwater with benzene. SB-3-W is a grab sample collected during installatioin of soil borin SB-3 Total and Dissolved lead analyzed by USEPA Method 6010 VOCs analyzed via USEPA Method 8260 Bold = Chemical detected at a concentration above the laboratory reporting limit Bold Highlighted = Results are above the MTCA Method A cleanup level

WA-6008 Site Investigation Report and Closure Request 6 of 10 ARCADIS 2013 Table 3

Soil Analytical Results - April 2013 Site Investigation Report and No Futher Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

All analytical results are presented in milligrams per kilogram (mg/kg) Boring Location (Sample Depth in Feet) MTCA Method SB-4 SB-4 SB-4 SB-5 SB-5 MW-2 MW-2 MW-3 MW-3 Analyte A Cleanup (4.5-5.0) (29.5-31) (40-41) (6.5-7) (9-10) (5.5-6) (30-31) (5-5.5) (32-33) Levels (mg/kg) 4/8/2013 4/8/2013 4/8/2013 4/10/2013 4/10/2013 4/11/2013 4/11/2013 4/8/2013 4/9/2013 Select VOCs, TPH and Lead Benzene 0.03 < 0.0036 < 0.0035 < 0.0030 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.0030 Toluene 7 < 0.0036 < 0.0035 < 0.0030 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.0030 Ethylbenzene 6 < 0.0036 < 0.0035 < 0.0030 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.0030 Total Xylenes 9 < 0.0108 < 0.0106 < 0.0089 < 0.0114 < 0.0110 < 0.0099 < 0.0093 < 0.0131 < 0.0091 MTBE 0.1 < 0.0036 < 0.0035 < 0.0030 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.0030 GRO 100 < 5.6 < 5.5 < 5.3 < 5.8 < 5.2 < 6.3 < 5.4 < 5.3 < 5.7 DRO 2000 < 16.9 < 16.1 < 16.3 < 16.4 < 16.4 < 17.6 < 17.1 < 16.4 < 16.7 HO 2000 < 22.5 < 21.4 < 21.7 < 21.8 < 21.8 < 23.5 < 22.8 < 21.8 < 22.2 Total Lead 250 16.9 6.6 5.8 12.7 10.6 10.5 8.1 8.9 7.3 Other VOCs 1,1,1,2-Tetrachloroethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,1,1-Trichloroethane 2 < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,1,2,2-Tetrachloroethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,1,2-Trichloroethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,1,2-Trichlorotrifluoroethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,1-Dichloroethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,1-Dichloroethene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,1-Dichloropropene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,2,3-Trichlorobenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,2,3-Trichloropropane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,2,4-Trichlorobenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,2,4-Trimethylbenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,2-Dibromo-3-chloropropane -- < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 1,2-Dichlorobenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,2-Dichloroethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003

WA-6008 Site Investigation Report and Closure Request 7 of 10 ARCADIS 2013 Table 3

Soil Analytical Results - April 2013 Site Investigation Report and No Futher Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

All analytical results are presented in milligrams per kilogram (mg/kg) Boring Location (Sample Depth in Feet) MTCA Method SB-4 SB-4 SB-4 SB-5 SB-5 MW-2 MW-2 MW-3 MW-3 Analyte A Cleanup (4.5-5.0) (29.5-31) (40-41) (6.5-7) (9-10) (5.5-6) (30-31) (5-5.5) (32-33) Levels (mg/kg) 4/8/2013 4/8/2013 4/8/2013 4/10/2013 4/10/2013 4/11/2013 4/11/2013 4/8/2013 4/9/2013 1,2-Dichloropropane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,3,5-Trimethylbenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,3-Dichlorobenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,3-Dichloropropane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 1,4-Dichlorobenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 2,2-Dichloropropane -- < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 2-Butanone -- < 0.018 < 0.0177 < 0.0149 < 0.019 < 0.0183 < 0.0165 < 0.0155 < 0.0218 < 0.0151 2-Chlorotoluene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 4-Chlorotoluene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Acetone -- 0.0487 < 0.0177 < 0.0149 < 0.019 < 0.0183 < 0.0165 < 0.0155 < 0.0218 < 0.0151 Allyl chloride -- < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 Bromobenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Bromochloromethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Bromoform -- < 0.018 < 0.0177 < 0.0149 < 0.019 < 0.0183 < 0.0165 < 0.0155 < 0.0218 < 0.0151 Bromomethane -- < 0.018 < 0.0177 < 0.0149 < 0.019 < 0.0183 < 0.0165 < 0.0155 < 0.0218 < 0.0151 Carbon tetrachloride -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 CFC-11 -- < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 CFC-12 -- < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 Chlorobenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Chloroethane -- < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 Chloroform -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Chloromethane -- < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 cis-1,2-Dichloroethene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 cis-1,3-Dichloropropene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Cumene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Dibromochloromethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003

WA-6008 Site Investigation Report and Closure Request 8 of 10 ARCADIS 2013 Table 3

Soil Analytical Results - April 2013 Site Investigation Report and No Futher Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

All analytical results are presented in milligrams per kilogram (mg/kg) Boring Location (Sample Depth in Feet) MTCA Method SB-4 SB-4 SB-4 SB-5 SB-5 MW-2 MW-2 MW-3 MW-3 Analyte A Cleanup (4.5-5.0) (29.5-31) (40-41) (6.5-7) (9-10) (5.5-6) (30-31) (5-5.5) (32-33) Levels (mg/kg) 4/8/2013 4/8/2013 4/8/2013 4/10/2013 4/10/2013 4/11/2013 4/11/2013 4/8/2013 4/9/2013 Dibromomethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Dichlorobromomethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Dichlorofluoromethane -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Diethyl ether (Ethyl ether) -- < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 Ethylene dibromide 0.005 < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Hexachlorobutadiene -- < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 Methyl isobutyl ketone -- < 0.018 < 0.0177 < 0.0149 < 0.019 < 0.0183 < 0.0165 < 0.0155 < 0.0218 < 0.0151 Methylene Chloride -- < 0.018 < 0.0177 < 0.0149 < 0.019 < 0.0183 < 0.0165 < 0.0155 < 0.0218 < 0.0151 Naphthalene 5 < 0.009 < 0.0089 < 0.0074 < 0.0095 < 0.0092 < 0.0082 < 0.0077 < 0.0109 < 0.0076 n-Butylbenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 n-Propylbenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 p-Isopropyltoluene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 sec-Butylbenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Styrene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 tert-Butylbenzene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Tetrachloroethene 0.05 < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Tetrahydrofuran -- < 0.0359 < 0.0354 < 0.0297 < 0.0379 < 0.0367 < 0.033 < 0.0309 < 0.0436 < 0.0303 trans-1,2-Dichloroethene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 trans-1,3-Dichloropropene -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Trichloroethene 0.03 < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003 Vinyl chloride -- < 0.0036 < 0.0035 < 0.003 < 0.0038 < 0.0037 < 0.0033 < 0.0031 < 0.0044 < 0.003

WA-6008 Site Investigation Report and Closure Request 9 of 10 ARCADIS 2013 Table 3

Soil Analytical Results - April 2013 Site Investigation Report and No Futher Action Request ARCO Facility No. 6008 212 15th Street Washougal, Washington

Notes -- = Cleanup level not established < = Concentration is below laboratory reporting limt (LRL) mg/kg = milligrams per kilogram bgs = below ground surface MTBE = Methyl tertiary butyl ether GRO = Total petroleum hydrocarbons - gasoline range organics analyzed via Northwest Method NWTPH-Gx/8021 DRO = Total petroleum hydrocarbons - diesel range organics analyzed via Northwest Method NWTPH-Dx HO = Total petroleum hydrocarbons - heavy-oil range organics analyzed via Northwest Method NWTPH-Dx VOC = Volatile organic compound Concentrations compared to the Model Toxics Control Act (MTCA) Method A soil cleanup levels for unrestricted land uses presented in Table 740-1 of Chapter 173-340 of the Washington Administrative Code (WAC) VOCs analyzed via United States Environmental Protection Agency (USEPA) Method 8260 Total lead analyzed by USEPA Method 6010 Bold = Chemical detected at a concentration above the Laboratory Reporting Limit but below MTCA Method A cleanup level

WA-6008 Site Investigation Report and Closure Request 10 of 10 ARCADIS 2013 Figures

LEGEND

B-2 SOIL BORING LOCATION (BROWN & CALDWELL, 1989)

PR-1 SOIL SAMPLE LOCATION (SWEET EDWARDS/EMCON, 1990)

B2 SOIL BORING LOCATION (EMCON, 1994)

Sample 2 SOIL SAMPLING LOCATION (PINNACLE, 1998)

D-1-6.0 SOIL SAMPLING LOCATION (DELTA, 2007)

SB-1 SOIL SAMPLING LOCATION (ARCADIS, 2011) REYES, ALEC CANOPY LOCATION BY:

CONCRETE

FORMER UST LOCATIONS 4/30/2013 2:14 PM CURRENT UST COMPLEX

PLOTTED: APPROXIMATE LOCATION OF TREATMENT GALLERY

NOTE: THIS MAP WAS PREPARED FROM A FIELD SURVEY

ARCADIS.CTB PERFORMED BY OTAK ON MAY 20, 2010

SOIL SAMPLE LOCATIONS ARE APPROXIMATE

PLOTSTYLETABLE: D-6-4.0 ----

PR-3

PAGESETUP: D-5-4.0

B-1 18.1S (LMS TECH) PR-2 E-T2-5 SW-E-6

B2 Z-C ACADVER: B3 PR-1 B3A B-4 Z-B B1 D-1-6.0 D-2-6.0 B4 B-2

4/30/2013 2:12 PM Z-A B5 SAVED: 3 W-T2-10 SW-15 SW-W-9 B-3 Sample1 Sample2 LAYOUT: PR-4 SB-1 D-3-3.5 D-4-3.5 SB-3

0 20' 40'

Approximate Scale: 1 in. = 20 ft. SB-2

ARCO FACILITY No. 6008 212 15th STREET WASHOUGAL, WASHINGTON

FIGURE

CITY:(Reqd) DIV/GROUP:(Reqd) DB:(Reqd) LD:(Opt) PIC:(Opt) PM:(Reqd) TM:(Opt) LYR:(Opt)ON=*;OFF=*REF* G:\ENVCAD\Emeryville\ACT\GP09BPNA\WA44\C0000\SAR\DWG\GP09BPNAWA44-B03.dwg 3 POTENTIAL RECEPTORS s t l PRIMARY SECONDARY l e e y) n a a t r r i e l u u ci ci i t t d e PRIMARY RELEASE RELEASE t r r t u u e e si U s s si ( F F

SOURCE(S) MECHANISM MECHANISM EXPOSURE MEDIA e r r m m n n d d R m m O ke EXPOSURE ke o n n r i r r o o a a o e o o ct r C C

ROUTE(S) t t s u u n n W W r t r e e t t e e u r r st ke si si r r F r f n n f u u o o C C O O C W

Ingestion ---- Surface Soil -- <15 ft bgs Dermal Contact ------Direct Contact Ingestion ------Subsurface Soil Dermal Contact ------> 15 ft bgs

Wind Erosion/ Airborne Dust Inhalation ------Suspension Potential Historic Ingestion ------Releases to Soil Groundwater Dermal Contact ------from Former Inhalation ------Gasoline USTs, Leaching to Associated Piping Groundwater and/or Fuel Groundwater Outdoor Air Vapor Inhalation ------Dispensers Volatilization

IndoorIndoor Air VaporAir Vapor Inhalation ------

Outdoor Air Vapor Inhalation ------Subsurface Soil Volatilization Indoor Air Vapor Inhalation ------

Notes: ARCO FACILITY NO. 6008 -- = Incomplete exposure pathway 212 15TH STREET, WASHOUGAL, WASHINGTON SITE INVESTIGATION REPORT AND NO FURTHER ACTION REQUEST CONCEPTUAL SITE MODEL OF HUMAN EXPOSURE PATHWAYS FIGURE 4 GRO

LEGEND

CANOPY LOCATION

CONCRETE

FORMER UST LOCATIONS

CURRENT UST COMPLEX

APPROXIMATE LOCATION OF TREATMENT GALLERY

REYES, ALEC MW-1 MONITORING WELL LOCATION AND IDENTIFICATION MW-2 BY: 4/11/2013 B T E X MTBE GRO DRO HO T-Pb SB-4 SOIL BORING LOCATION AND IDENTIFICATION MW-2-5.5-6 < 0.0033 < 0.00 33 < 0.0033 < 0.0099 < 0.0033 < 6.3 < 17.6 < 23.5 10.5 MW-2-30-31 < 0.0031 < 0.0031 < 0.0031 < 0.0093 < 0.0031 < 5.4 < 17.1 < 22.8 8.1 MW-2 LOCATION ID

4/30/2013 3:50 PM SAMPLE DATE 4/11/2013 B ANALYTE SAMPLE ID MW-2-5.5-6 < 3.3 CONCENTRATION IN mg/kg

PLOTTED: SB5 4/10/2013 GRO TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE ORGANICS

ARCADIS.CTB DRO TOTAL PETROLEUM HYDROCARBONS - DIESEL RANGE ORGANICS

HO TOTAL PETROLEUM HYDROCARBONS - HEAVY OIL RANGE ORGANICS PLOTSTYLETABLE:

---- B BENZENE

T TOLUENE PAGESETUP: E ETHYLBENZENE

X SB-5 TOTAL XYLENES MW-2 18.1S (LMS TECH) MTBE METHYL TERTIARY BUTYL ETHER

T-Pb TOTAL LEAD ACADVER: SB-4/MW-1

NOTES:

4/30/2013 3:38 PM 1. THIS MAP WAS PREPARED FROM A FIELD SURVEY PERFORMED BY OTAK ON MAY 20, 2010 SAVED: 4 2. ALL UNITS IN MILLIGRAMS PER KILOGRAM (mg/kg)

LAYOUT: 3. SOIL SAMPLE LOCATIONS ARE APPROXIMATE

0 20' 40' MW-3 Approximate Scale: 1 in. = 20 ft.

ARCO FACILITY No. 6008 212 15th STREET WASHOUGAL, WASHINGTON

SB-4

MW-3 4/8-9/2013 FIGURE

CITY:(Reqd) DIV/GROUP:(Reqd) DB:(Reqd) LD:(Opt) PIC:(Opt) PM:(Reqd) TM:(Opt) LYR:(Opt)ON=*;OFF=*REF* G:\ENVCAD\Emeryville\ACT\GP09BPNA\WA44\C0000\SAR\DWG\GP09BPNAWA44 B04.dwg 5 LEGEND

CANOPY LOCATION

CONCRETE

FORMER UST LOCATIONS

CURRENT UST COMPLEX

APPROXIMATE LOCATION OF TREATMENT GALLERY

REYES, ALEC MW-1 MONITORING WELL LOCATION AND IDENTIFICATION BY: GRO TOTAL PETROLEUM HYDROCARBONS - DIESEL RANGE ORGANICS

DRO TOTAL PETROLEUM HYDROCARBONS - 4/30/2013 3:52 PM GASOLINE RANGE ORGANICS MW-2 GRO HO HO TOTAL PETROLEUM HYDROCARBONS - PLOTTED: Date B T E X MTBE DRO T-Pb D-Pb HEAVY OIL RANGE ORGANICS 4/17/2013 < 1.0 < 1.0 < 1.0 < 3.0 < 1.0 < 100 < 430 < 430 11.3 < 10.0 B BENZENE ARCADIS.CTB T TOLUENE

E ETHYLBENZENE

X TOTAL XYLENES PLOTSTYLETABLE: ---- MTBE METHYL TERTIARY BUTYL ETHER

T-Pb TOTAL LEAD

PAGESETUP: DPb DISSOLVED LEAD

NOTES: MW-2 18.1S (LMS TECH) 1. THIS MAP WAS PREPARED FROM A FIELD SURVEY PERFORMED BY OTAK ON MAY 20, 2010

ACADVER: MW-1 2. $//81,76,10,&52*5$063(5/,7(5 J/

3. WELL LOCATIONS ARE APPROXIMATE 4/30/2013 3:41 PM SAVED: 5 LAYOUT:

0 20' 40' MW-3 Approximate Scale: 1 in. = 20 ft.

ARCO FACILITY No. 6008 212 15th STREET WASHOUGAL, WASHINGTON

MW-1 MW-3 Date B T E X MTBE GRO DRO HO T-Pb D-Pb Date B T E X MTBE GRO DRO HO T-Pb D-Pb FIGURE 4/17/2013 < 1.0 < 1.0 < 1.0 < 3.0 < 1.0 < 100 < 430 < 430 < 10.0 < 10.0 4/17/2013 < 1.0 < 1.0 < 1.0 < 3.0 < 1.0 < 100 < 430 < 430 22.5 <10.0 CITY:(Reqd) DIV/GROUP:(Reqd) DB:(Reqd) LD:(Opt) PIC:(Opt) PM:(Reqd) TM:(Opt) LYR:(Opt)ON=*;OFF=*REF* G:\ENVCAD\Emeryville\ACT\GP09BPNA\WA44\C0000\SAR\DWG\GP09BPNAWA44 B05.dwg 6 Appendix A

Response to No Further Action Request, Ecology 2011

Appendix B

Soil Boring Logs

Date Start/Finish: April 8, 2013 Northing: NM Well/Boring ID: MW-1 Drilling Company: Cascade Drilling, LP Easting: NM Driller's Name: Jeff Jones Casing Elevation: NM Client: BP West Coast Products, LLC Drilling Method: Rotosonic Sampling Method: Core Barrel Sampling Borehole Depth: NM Location: ARCO Facility No. 6008 Rig Type: Track-Mounted Rotosonic Surface Elevation: NM 212 15th Street Washougal, Washington Descriptions By: M. Al-Johar ) r m e p b p e ( l n

m e ) p e u t m p c e m N u y l a

e Well/Boring a T f o n p / N ( S t

s u

C l n O y d I

I Stratigraphic Description Construction R r a / c

a i T e c e e i e l g l t v A H p o p H y o l l T V c o m a m P E D e e a I n a L E R S P A G S E D

Flush-mount Monument Locking J-Plug

0 0 ASPHALT

FILL (gravel, sand, and silt), loose, dry, dark grey. Geoliner/visquene encountered 0.0 at 1.5 feet below ground surface.

FILL (cobbles, gravel, sand, silt), loose, dry, brown. Increasing cobbles with depth. Cobbles greater than 1 foot in diameter encountered at 3.8 feet below ground Concrete surface. 0.0

1 1-7 7

GRAVEL, some fine to coarse grained sand, some silt, loose, dry, brown. 5 -5 GRAVEL, some fine to coarse grained sand, some silt, loose, dry, brown. 0.0

0.0

GRAVEL, some fine to coarse grained sand, some silt, medium dense, moist, brown.

2 7-10 3 0.0

10 -10 PVC Well Casing GRAVEL, some fine to coarse grained sand, little silt, medium dense, moist, brown. (Schedule 40, 2 0.0 inch diameter)

COBBLES (up to 6 inches in diameter), gravel, some fine to coarse grained sand, medium dense, dark brown. 3 10-15 5 GRAVEL, some fine to coarse grained sand, medium dense, moist, dark brown.

0.0 Granulated Bentonite 3/8 inch

15 -15 COBBLES (up to 6 inches in diameter), little fine to coarse grained sand, loose, dry, 0.0 gray.

Remarks: Water first encountered at 22.5 feet below ground surface. NR = No Recovery NM = Not Measured bgs = below ground surface

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 1 of 3 Logs r a e/ d td b:/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharMW-1.dat Client: BP West Coast Products, LLC Well/Boring ID: MW-1

Borehole Depth: NM Site Location: ARCO Facility No. 6008 212 15th Street Washougal, Washington ) r m e p b p e ( l n m

e p ) u e t m p c m e N u y l

a a e T o f n Well/Boring p / N ( S t u

s C l O n y d I I

R Stratigraphic Description a r c /

Construction i a T c e e e i g l e l t H A v o p p y H l T o l V

o c m a P m E D e e a n a I E L R S A G S P E D

GRAVEL, coarse-grained, some silt, little fine to coarse grained sand, medium dense, moist, brown.

4 15-20 5 0.0

20 -20 GRAVEL, some fine to coarse grained sand, some cobbles, little silt, medium dense, PVC Well Casing moist, olive brown. (Schedule 40, 2 inch diameter)

Groundwater 5 20-25 5 GRAVEL, little fine to coarse grained sand, little silt, medium dense, wet, light First brown. Encountered

25 -25 Granulated GRAVEL, some cobbles (up to 6 inches in diameter), some fine to coarse grained Bentonite 3/8 0.0 sand, loose, dry, gray. inch

6 25-30 5 0.0 GRAVEL, some cobbles (up to 6 inches in diameter), some silt, little fine to coarse grained sand, moist, medium dense, gray.

0.0

30 -30 GRAVEL, some coarse grained sand, some cobbles (up to 6 inches in diameter), 0.0 wet, loose, olive brown.

0.0

7 30-35 5

35 -35 GRAVEL, some silt, some cobbles (up to 4 inches in diameter), medium dense, wet 0.0 to moist, gray.

Remarks: Water first encountered at 22.5 feet below ground surface. NR = No Recovery NM = Not Measured bgs = below ground surface

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 2 of 3 Logs r a e/ d td b:/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharMW-1.dat Client: BP West Coast Products, LLC Well/Boring ID: MW-1

Borehole Depth: NM Site Location: ARCO Facility No. 6008 212 15th Street Washougal, Washington ) r m e p b p e ( l n m

e p ) u e t m p c m e N u y l

a a e T o f n Well/Boring p / N ( S t u

s C l O n y d I I

R Stratigraphic Description a r c /

Construction i a T c e e e i g l e l t H A v o p p y H l T o l V

o c m a P m E D e e a n a I E L R S A G S P E D

GRAVEL, some cobbles (up to 4 inches in diameter), some fine to coarse grained sand, loose, moist to dry, olive brown.

8 35-40 5 0.0

40 -40 GRAVEL, some silt, some fine to coarse grained sand, medium dense, wet, dark gray.

GRAVEL, some fine to coarse grained sand, little silt, loose, wet, dark gray.

9 40-45 5

10/20 Sand Pack

45 -45 0.01 inch slot GRAVEL, some fine to coarse grained sand, little silt, medium dense, wet, dark PVC well screen gray. (Schedule 40, 2 inch diameter)

10 45-50 5 GRAVEL, some fine to coarse grained sand, little silt, loose, wet, dark gray.

End of boring at 50 feet bgs. 50 -50

Remarks: Water first encountered at 22.5 feet below ground surface. NR = No Recovery NM = Not Measured bgs = below ground surface

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 3 of 3 Logs r a e/ d td b:/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharMW-1.dat Date Start/Finish: April 10 to April 11, 2013 Northing: NM Well/Boring ID: MW-2 Drilling Company: Cascade Drilling, LP Easting: NM Driller's Name: Jeff Jones Casing Elevation: NM Client: BP West Coast Products, LLC Drilling Method: Rotosonic Sampling Method: Core Barrel Sampling Borehole Depth: NM Location: ARCO Facility No. 6008 Rig Type: Track-Mounted Rotosonic Surface Elevation: NM 212 15th Street Washougal, Washington Descriptions By: M. Al-Johar ) r m e p b p e ( l n

m e ) p e u t m p c e m N u y l a

e Well/Boring a T f o n p / N ( S t

s u

C l n O y d I

I Stratigraphic Description Construction R r a / c

a i T e c e e i e l g l t v A H p o p H y o l l T V c o m a m P E D e e a I n a L E R S P A G S E D

Flush-mount Monument Locking J-Plug

0 0 ASPHALT

FILL (gravel, sand, and silt) 0.0

Concrete COBBLES (up to 2 feet in diameter), some gravel, some fine to coarse grained 1 1-5.5 5.5 0.0 sand, loose, dry, brown.

5 -5 Granulated Bentonite 3/8 COBBLES (up to 6 inches in diameter), some coarse grained gravel, some silt, inch 0.0 medium dense, moist to dry, dark olive brown.

COBBLES (up to 6 inches in diameter), some coarse grained gravel, some silt, 0.0 loose, dry, gray.

2 5.5-6 4.5

GRAVEL, some fine to coarse grained sand, some cobbles (up to 6 inches in 0.0 diameter), loose, moist to dry, olive brown.

10 -10 GRAVEL, some silt, some fine grained sand, medium dense, moist, dark olive 0.0 brown.

3 10-15 5 GRAVEL and SILT, some cobbles (up to 6 inches in diameter), little fine grained sand, medium dense, moist, dark olive brown.

0.0

15 -15 PVC Well Casing 0.0 (Schedule 40, 2 inch diameter) Remarks: Field duplicate sample collected at MW-2-30-31. Water first encountered at 29 feet below ground surface. NR = No Recovery NM = Not Measured

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 1 of 3 Logs r a e/ d td b:/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharMW-2.dat Client: BP West Coast Products, LLC Well/Boring ID: MW-2

Borehole Depth: NM Site Location: ARCO Facility No. 6008 212 15th Street Washougal, Washington ) r m e p b p e ( l n m

e p ) u e t m p c m e N u y l

a a e T o f n Well/Boring p / N ( S t u

s C l O n y d I I

R Stratigraphic Description a r c /

Construction i a T c e e e i g l e l t H A v o p p y H l T o l V

o c m a P m E D e e a n a I E L R S A G S P E D

4 15-20 5 GRAVEL, some cobbles (up to 6 inches in diameter), some silt, loose, moist, olive 0.0 brown.

20 -20 PVC Well Casing No recovery. Core barrel lost and then recovered out of the hole. (Schedule 40, 2 inch diameter)

5 20-25 0

25 -25 Granulated GRAVEL, some silt, some coarse grained sand, loose, wet to moist, olive brown. Bentonite 3/8 0.0 inch

GRAVEL, some cobbles (up to 6 inches in diameter), some fine to coarse grained 6 25-30 5 0.0 sand, some silt, medium dense, moist to dry, gray to olive brown.

Groundwater 0.0 GRAVEL, some coarse grained sand, little cobbles (up to 6 inches in diameter), First moist, loose, olive brown. Encountered 30 -30 GRAVEL, some silt, some coarse grained sand, medium dense, moist to wet, olive 0.0 brown.

GRAVEL, some cobbles up to 4 inches in diameter), some coarse grained sand, 0.0 wet, loose, dark olive brown.

7 30-35 5

10/20 Sand Pack

35 -35 0.01 inch slot GRAVEL, some silt, loose, moist to dry, gray to olive brown. PVC well screen 0.0 (Schedule 40, 2 inch diameter) Remarks: Field duplicate sample collected at MW-2-30-31. Water first encountered at 29 feet below ground surface. NR = No Recovery NM = Not Measured

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 2 of 3 Logs r a e / d t d b :/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharMW-2.dat Client: BP West Coast Products, LLC Well/Boring ID: MW-2

Borehole Depth: NM Site Location: ARCO Facility No. 6008 212 15th Street Washougal, Washington ) r m e p b p e ( l n m

e p ) u e t m p c m e N u y l

a a e T o f n Well/Boring p / N ( S t u

s C l O n y d I I

R Stratigraphic Description a r c /

Construction i a T c e e e i g l e l t H A v o p p y H l T o l V

o c m a P m E D e e a n a I E L R S A G S P E D

8 35-40 5 GRAVEL, some fine to coarse grained sand, loose, dry, gray to olive brown. 0.0

End of boring at 44 feet bgs. 40 -40

Remarks: Field duplicate sample collected at MW-2-30-31. Water first encountered at 29 feet below ground surface. NR = No Recovery NM = Not Measured

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 3 of 3 Logs r a e/ d td b:/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharMW-2.dat Date Start/Finish: April 8 to April 9, 2013 Northing: NM Well/Boring ID: MW-3 Drilling Company: Cascade Drilling, LP Easting: NM Driller's Name: Jeff Jones Casing Elevation: NM Client: BP West Coast Products, LLC Drilling Method: Rotosonic Sampling Method: Core Barrel Sampling Borehole Depth: NM Location: ARCO Facility No. 6008 Rig Type: Track-Mounted Rotosonic Surface Elevation: NM 212 15th Street Washougal, Washington Descriptions By: M. Al-Johar ) r m e p b p e ( l n

m e ) p e u t m p c e m N u y l a

e Well/Boring a T f o n p / N ( S t

s u

C l n O y d I

I Stratigraphic Description Construction R r a / c

a i T e c e e i e l g l t v A H p o p H y o l l T V c o m a m P E D e e a I n a L E R S P A G S E D

Flush-mount Monument Locking J-Plug

0 0 ASPHALT

COBBLES (up to 2 feet in diameter), some fine to coarse grained sand, some gravel, loose, dry, gray.

Concrete

1 0-5.5 0

5 -5 Granulated SAND, fine to coarse grained, some gravel, loose, moist, brown. Bentonite 3/8 0.0 inch

GRAVEL, some fine to coarse grained sand, loose, moist, brown. 2 5.5-10 4.5 0.0

COBBLES, some gravel, little fine grained sand, moist, loose, gray.

SAND, fine to medium grained sand, trace gravel, loose, moist, light brown. 0.0 10 -10 PVC Well Casing (Schedule 40, 2 0.0 inch diameter)

COBBLE (rock core up to 1.5 feet diameter).

3 10-15 5 0.0 GRAVEL, some cobbles (up to 6 inches in diameter), some fine to coarse grained sand, loose, dry, light gray.

15 -15 GRAVEL, some cobbles (up to 6 inches in diameter), some fine to coarse grained 0.0 sand, loose, wet, light olive brown.

Remarks: NR = No Recovery NM = Not Measured bgs = below ground surface Water first encountered at 32 feet below ground surface.

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 1 of 3 Logs r a e/ d td b:/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharMW-3.dat Client: BP West Coast Products, LLC Well/Boring ID: MW-3

Borehole Depth: NM Site Location: ARCO Facility No. 6008 212 15th Street Washougal, Washington ) r m e p b p e ( l n m

e p ) u e t m p c m e N u y l

a a e T o f n Well/Boring p / N ( S t u

s C l O n y d I I

R Stratigraphic Description a r c /

Construction i a T c e e e i g l e l t H A v o p p y H l T o l V

o c m a P m E D e e a n a I E L R S A G S P E D

4 15-20 5 0.0

GRAVEL, some silt, some cobbles (up to 6 inches in diameter), dense, dry, dark olive gray.

SAND, some gravel, some silt, medium dense, brown. 0.0 20 -20 PVC Well Casing GRAVEL, some silt, some clay, loose, low plasticity clay, little cobbles (up to 4 (Schedule 40, 2 inches in diameter), wet, dark olive gray. inch diameter)

SAND, some gravel, some silt, medium dense, dry to moist, brown. 5 20-25 0

No recovery. 0.0

25 -25 Granulated No recovery. Bentonite 3/8 inch

6 25-30 0

30 -30 GRAVEL, some silt, some clay, some cobbles (up to 6 inches in diameter), medium plasticity clay, loose, wet, dark olive gray.

0.0 Groundwater SILT, some gravel, some fine grained sand, low plasticity, soft, moist, dark olive First 7 30-35 5 gray. Encountered

GRAVEL, some silt, some cobbles (up to 6 inches in diameter), loose, moist, dark olive gray.

35 -35 0.01 inch slot GRAVEL, some silt, some cobbles (up to 6 inches in diameter), loose, wet, dark PVC well screen 0.0 olive gray. (Schedule 40, 2 inch diameter) Remarks: NR = No Recovery NM = Not Measured bgs = below ground surface Water first encountered at 32 feet below ground surface.

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 2 of 3 Logs r a e / d t d b :/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharMW-3.dat Client: BP West Coast Products, LLC Well/Boring ID: MW-3

Borehole Depth: NM Site Location: ARCO Facility No. 6008 212 15th Street Washougal, Washington ) r m e p b p e ( l n m

e p ) u e t m p c m e N u y l

a a e T o f n Well/Boring p / N ( S t u

s C l O n y d I I

R Stratigraphic Description a r c /

Construction i a T c e e e i g l e l t H A v o p p y H l T o l V

o c m a P m E D e e a n a I E L R S A G S P E D

8 35-40 5 0.0 GRAVEL, some fine grained sand, little silt, loose, wet, dark olive gray.

40 -40 GRAVEL, some silt, medium dense, wet, dark olive gray.

GRAVEL, some fine grained sand, loose, wet, dark olive gray.

GRAVEL, some silt, medium dense, moist, dark olive gray.

Native Slough

GRAVEL, some fine grained sand, little cobbles, loose, moist, olive gray.

End of boring at 45 feet bgs. 45 -45

Remarks: NR = No Recovery NM = Not Measured bgs = below ground surface Water first encountered at 32 feet below ground surface.

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 3 of 3 Logs r a e/ d td b:/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharMW-3.dat Date Start/Finish: April 10, 2013 Northing: NM Well/Boring ID: SB-5 Drilling Company: Cascade Drilling, LP Easting: NM Driller's Name: Jeff Jones Casing Elevation: NM Client: BP West Coast Products, LLC Drilling Method: Rotosonic Sampling Method: Core Barrel Sampling Borehole Depth: NM Location: ARCO Facility No. 6008 Rig Type: Track-Mounted Rotosonic Surface Elevation: NM 212 15th Street Washougal, Washington Descriptions By: M. Al-Johar ) r m e p b p e ( l n

m e ) p e u t m p c e m N u y l a

e Well/Boring a T f o n p / N ( S t

s u

C l n O y d I

I Stratigraphic Description Construction R r a / c

a i T e c e e i e l g l t v A H p o p H y o l l T V c o m a m P E D e e a I n a L E R S P A G S E D 0 0 ASPHALT

FILL (cobbles, gravel, sand, and silt), medium dense, moist to dry, brown.

Concrete

COBBLES (up to 2 feet in diameter), some gravel, some fine to coarse grained 1 0-5 5 sand, moist to dry, brown.

5 -5 0.0 GRAVEL, some fine to coarse grained sand, some cobbles (up to 6 inches in diameter), loose, moist, brown (5YR 4/6).

Granulated Bentonite 3/8 inch COBBLES (up to 6 inches in diameter), some gravel, some fine to coarse grained 2 5-10 5 sand, dry, loose, gray.

0.0 SAND, fine to coarse grained, some gravel, some cobbles (up to 6 inches in diameter), loose, moist to dry, gray to brown.

0.0 End of boring at 10 feet bgs. 10 -10

Remarks: NR = No Recovery NM = Not Measured

Project:GP09BPNA.WA44.C0000 Template: G:\PROJECTS\BP\BP Tranche 2\projects\Washington\WA-06008\Site Assessment\2013Page: Site Assessment\Boring 1 of 1 Logs r a e/ d td b:/121Dt:aaFile: Created/Edited by:5/31/2013Date:Data M. Al-JoharSB-5.dat Appendix C

Laboratory Analytical Reports and Chains-of-Custody

#=CL#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

LIMS USE: FR - ALEX LOPEZ LIMS OBJECT ID: 10225201 April 24, 2013

Alex Lopez Arcadis 111 SW Columbia St. Ste. 725 Portland, OR 97201

RE: Project: WA-06008 Pace Project No.: 10225201

Dear Alex Lopez: Enclosed are the analytical results for sample(s) received by the laboratory on April 12, 2013. The results relate only to the samples included in this report. Results reported herein conform to the most current TNI standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report.

If you have any questions concerning this report, please feel free to contact me.

Sincerely,

Mariah Peronto

[email protected] Project Manager

Enclosures

cc: Timothy Bellis, Arcadis OR Jonathan Flomerfelt, Arcadis U.S., Inc. Brian Marcum, Arcadis OR Lynne Stewart, Arcadis OR

REPORT OF LABORATORY ANALYSIS Page 1 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 1 of 46 #=CP#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

CERTIFICATIONS

Project: WA-06008 Pace Project No.: 10225201

Minnesota Certification IDs 1700 Elm Street SE Suite 200, Minneapolis, MN 55414 Montana Certification #: MT CERT0092 A2LA Certification #: 2926.01 Nebraska Certification #: Pace Alaska Certification #: UST-078 Nevada Certification #: MN_00064 Alaska Certification #MN00064 New Jersey Certification #: MN-002 Arizona Certification #: AZ-0014 New York Certification #: 11647 Arkansas Certification #: 88-0680 North Carolina Certification #: 530 California Certification #: 01155CA North Dakota Certification #: R-036 Colorado Certification #Pace North Dakota Certification #: R-036A Connecticut Certification #: PH-0256 Ohio VAP Certification #: CL101 EPA Region 8 Certification #: Pace Oklahoma Certification #: 9507 Florida/NELAP Certification #: E87605 Oregon Certification #: MN200001 Georgia Certification #: 959 Oregon Certification #: MN300001 Hawaii Certification #Pace Pennsylvania Certification #: 68-00563 Idaho Certification #: MN00064 Puerto Rico Certification Illinois Certification #: 200011 Tennessee Certification #: 02818 Kansas Certification #: E-10167 Texas Certification #: T104704192 Louisiana Certification #: 03086 Utah Certification #: MN00064 Louisiana Certification #: LA080009 Virginia/DCLS Certification #: 002521 Maine Certification #: 2007029 Virginia/VELAP Certification #: 460163 Maryland Certification #: 322 Washington Certification #: C754 Michigan DEQ Certification #: 9909 West Virginia Certification #: 382 Minnesota Certification #: 027-053-137 Wisconsin Certification #: 999407970 Mississippi Certification #: Pace

REPORT OF LABORATORY ANALYSIS Page 2 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 2 of 46 #=SS#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

SAMPLE SUMMARY

Project: WA-06008 Pace Project No.: 10225201

Lab ID Sample ID Matrix Date Collected Date Received

10225201001 SB-4-4.5-5.0 Solid 04/08/13 10:25 04/12/13 09:05 10225201002 SB-4-29.5-30 Solid 04/08/13 14:15 04/12/13 09:05 10225201003 SB-4-40-41 Solid 04/08/13 15:00 04/12/13 09:05 10225201004 MW-3-5-5.5 Solid 04/08/13 14:00 04/12/13 09:05 10225201005 MW-3-32-33 Solid 04/09/13 11:00 04/12/13 09:05 10225201006 SB-5-6.5-7 Solid 04/10/13 12:00 04/12/13 09:05 10225201007 SB-5-9-10 Solid 04/10/13 12:50 04/12/13 09:05 10225201008 MW-2-5.5-6 Solid 04/11/13 08:45 04/12/13 09:05 10225201009 MW-2-30-31 Solid 04/11/13 11:45 04/12/13 09:05 10225201010 BD Solid 04/08/13 00:00 04/12/13 09:05 10225201011 Trip Blank Solid 04/08/13 00:00 04/12/13 09:05

REPORT OF LABORATORY ANALYSIS Page 3 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 3 of 46 #=SA#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

SAMPLE ANALYTE COUNT

Project: WA-06008 Pace Project No.: 10225201

Analytes Lab ID Sample ID Method Analysts Reported

10225201001 SB-4-4.5-5.0 NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201002 SB-4-29.5-30 NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201003 SB-4-40-41 NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201004 MW-3-5-5.5 NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201005 MW-3-32-33 NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201006 SB-5-6.5-7 NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201007 SB-5-9-10 NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201008 MW-2-5.5-6 NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2

REPORT OF LABORATORY ANALYSIS Page 4 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 4 of 46 #=SA#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

SAMPLE ANALYTE COUNT

Project: WA-06008 Pace Project No.: 10225201

Analytes Lab ID Sample ID Method Analysts Reported

EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201009 MW-2-30-31 NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201010 BD NWTPH-Dx MT 3 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 ASTM D2974 CMS2 1 EPA 8260 CNC 70 10225201011 Trip Blank EPA 8260 CNC 7

REPORT OF LABORATORY ANALYSIS Page 5 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 5 of 46 #=NA#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

PROJECT NARRATIVE

Project: WA-06008 Pace Project No.: 10225201

Method: NWTPH-Dx Description: NWTPH-Dx GCS Client: Arcadis OR Date: April 24, 2013

General Information: 10 samples were analyzed for NWTPH-Dx. All samples were received in acceptable condition with any exceptions noted below.

Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below.

Sample Preparation: The samples were prepared in accordance with EPA 3546 with any exceptions noted below.

Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below.

Continuing Calibration: All criteria were within method requirements with any exceptions noted below.

Surrogates: All surrogates were within QC limits with any exceptions noted below. QC Batch: OEXT/21375 S5: Surrogate recovery outside control limits due to matrix interferences (not confirmed by re-analysis). • MS (Lab ID: 1409708) • n-Pentacosane (S) • MSD (Lab ID: 1409709) • n-Pentacosane (S)

Method Blank: All analytes were below the report limit in the method blank with any exceptions noted below.

Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below.

Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below.

Additional Comments:

REPORT OF LABORATORY ANALYSIS Page 6 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 6 of 46 #=NA#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

PROJECT NARRATIVE

Project: WA-06008 Pace Project No.: 10225201

Method: NWTPH-Gx/8021 Description: NWTPH-Gx/8021 GCV Client: Arcadis OR Date: April 24, 2013

General Information: 10 samples were analyzed for NWTPH-Gx/8021. All samples were received in acceptable condition with any exceptions noted below.

Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below.

Sample Preparation: The samples were prepared in accordance with NWTPH-Gx/8021 with any exceptions noted below.

Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below.

Continuing Calibration: All criteria were within method requirements with any exceptions noted below.

Internal Standards: All internal standards were within QC limits with any exceptions noted below.

Surrogates: All surrogates were within QC limits with any exceptions noted below.

Method Blank: All analytes were below the report limit in the method blank with any exceptions noted below.

Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below.

Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below.

Duplicate Sample: All duplicate sample results were within method acceptance criteria with any exceptions noted below.

Additional Comments: Analyte Comments:

QC Batch: GCV/10585 D3: Sample was diluted due to the presence of high levels of non-target analytes or other matrix interference. • DUP (Lab ID: 1408877) • a,a,a-Trifluorotoluene (S)

REPORT OF LABORATORY ANALYSIS Page 7 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 7 of 46 #=NA#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

PROJECT NARRATIVE

Project: WA-06008 Pace Project No.: 10225201

Method: EPA 6010 Description: 6010 MET ICP Client: Arcadis OR Date: April 24, 2013

General Information: 10 samples were analyzed for EPA 6010. All samples were received in acceptable condition with any exceptions noted below.

Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below.

Sample Preparation: The samples were prepared in accordance with EPA 3050 with any exceptions noted below.

Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below.

Continuing Calibration: All criteria were within method requirements with any exceptions noted below.

Method Blank: All analytes were below the report limit in the method blank with any exceptions noted below.

Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below.

Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below.

Additional Comments:

REPORT OF LABORATORY ANALYSIS Page 8 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 8 of 46 #=NA#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

PROJECT NARRATIVE

Project: WA-06008 Pace Project No.: 10225201

Method: EPA 8260 Description: 8260 MSV 5035 Low Level Client: Arcadis OR Date: April 24, 2013

General Information: 10 samples were analyzed for EPA 8260. All samples were received in acceptable condition with any exceptions noted below.

Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below.

Sample Preparation: The samples were prepared in accordance with EPA 5035A with any exceptions noted below.

Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below.

Continuing Calibration: All criteria were within method requirements with any exceptions noted below.

Internal Standards: All internal standards were within QC limits with any exceptions noted below.

Surrogates: All surrogates were within QC limits with any exceptions noted below.

Method Blank: All analytes were below the report limit in the method blank with any exceptions noted below.

Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below.

Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below. QC Batch: MSV/23411 A matrix spike and matrix spike duplicate (MS/MSD) were performed on the following sample(s): 10225009001 M1: Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. • MS (Lab ID: 1412415) • Dichlorodifluoromethane • MSD (Lab ID: 1412416) • Dichlorodifluoromethane

Additional Comments:

REPORT OF LABORATORY ANALYSIS Page 9 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

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Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

PROJECT NARRATIVE

Project: WA-06008 Pace Project No.: 10225201

Method: EPA 8260 Description: 8260 MSV 5030 Med Level Client: Arcadis OR Date: April 24, 2013

General Information: 1 sample was analyzed for EPA 8260. All samples were received in acceptable condition with any exceptions noted below.

Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below.

Sample Preparation: The samples were prepared in accordance with EPA 5035/5030B with any exceptions noted below.

Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below.

Continuing Calibration: All criteria were within method requirements with any exceptions noted below.

Internal Standards: All internal standards were within QC limits with any exceptions noted below.

Surrogates: All surrogates were within QC limits with any exceptions noted below.

Method Blank: All analytes were below the report limit in the method blank with any exceptions noted below.

Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below.

Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below.

Additional Comments: Sample Comments: The trip blank data has been evaluated down to the MDL and no j-flagged hits were present. • Trip Blank (Lab ID: 10225201011)

This data package has been reviewed for quality and completeness and is approved for release.

REPORT OF LABORATORY ANALYSIS Page 10 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 10 of 46 #=AR#

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ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: SB-4-4.5-5.0 Lab ID: 10225201001 Collected: 04/08/13 10:25 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 16.9 1 04/15/13 08:09 04/17/13 10:13 Motor Oil Range ND mg/kg 22.5 1 04/15/13 08:09 04/17/13 10:13 Surrogates n-Pentacosane (S) 76 % 50-150 1 04/15/13 08:09 04/17/13 10:13 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 5.6 1 04/12/13 13:39 04/15/13 13:30 Surrogates a,a,a-Trifluorotoluene (S) 100 % 66-125 1 04/12/13 13:39 04/15/13 13:30 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 16.9 mg/kg 1.0 1 04/19/13 07:23 04/22/13 15:18 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 12.1 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A

Acetone 48.7 ug/kg 18.0 1 04/12/13 11:56 04/19/13 21:05 67-64-1 Allyl chloride ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 107-05-1 Benzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 71-43-2 Bromobenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 108-86-1 Bromochloromethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 74-97-5 Bromodichloromethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 75-27-4 Bromoform ND ug/kg 18.0 1 04/12/13 11:56 04/19/13 21:05 75-25-2 Bromomethane ND ug/kg 18.0 1 04/12/13 11:56 04/19/13 21:05 74-83-9 2-Butanone (MEK) ND ug/kg 18.0 1 04/12/13 11:56 04/19/13 21:05 78-93-3 n-Butylbenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 104-51-8 sec-Butylbenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 135-98-8 tert-Butylbenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 98-06-6 Carbon tetrachloride ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 56-23-5 Chlorobenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 108-90-7 Chloroethane ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 75-00-3 Chloroform ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 67-66-3 Chloromethane ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 74-87-3 2-Chlorotoluene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 95-49-8 4-Chlorotoluene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 96-12-8 Dibromochloromethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 106-93-4 Dibromomethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 74-95-3 1,2-Dichlorobenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 95-50-1 1,3-Dichlorobenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 541-73-1 1,4-Dichlorobenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 106-46-7 Dichlorodifluoromethane ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 75-71-8 1,1-Dichloroethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 11 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 11 of 46 #=AR#

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ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 107-06-2 1,1-Dichloroethene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 75-35-4 cis-1,2-Dichloroethene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 156-59-2 trans-1,2-Dichloroethene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 156-60-5 Dichlorofluoromethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 75-43-4 1,2-Dichloropropane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 78-87-5 1,3-Dichloropropane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 142-28-9 2,2-Dichloropropane ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 594-20-7 1,1-Dichloropropene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 563-58-6 cis-1,3-Dichloropropene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 60-29-7 Ethylbenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 98-82-8 p-Isopropyltoluene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 99-87-6 Methylene Chloride ND ug/kg 18.0 1 04/12/13 11:56 04/19/13 21:05 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 18.0 1 04/12/13 11:56 04/19/13 21:05 108-10-1 Methyl-tert-butyl ether ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 1634-04-4 Naphthalene ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 91-20-3 n-Propylbenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 103-65-1 Styrene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 79-34-5 Tetrachloroethene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 127-18-4 Tetrahydrofuran ND ug/kg 35.9 1 04/12/13 11:56 04/19/13 21:05 109-99-9 Toluene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 120-82-1 1,1,1-Trichloroethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 71-55-6 1,1,2-Trichloroethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 79-00-5 Trichloroethene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 79-01-6 Trichlorofluoromethane ND ug/kg 9.0 1 04/12/13 11:56 04/19/13 21:05 75-69-4 1,2,3-Trichloropropane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 108-67-8 Vinyl chloride ND ug/kg 3.6 1 04/12/13 11:56 04/19/13 21:05 75-01-4 Xylene (Total) ND ug/kg 10.8 1 04/12/13 11:56 04/19/13 21:05 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 89 % 30-150 1 04/12/13 11:56 04/19/13 21:05 17060-07-0 Toluene-d8 (S) 98 % 30-150 1 04/12/13 11:56 04/19/13 21:05 2037-26-5 4-Bromofluorobenzene (S) 104 % 30-150 1 04/12/13 11:56 04/19/13 21:05 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 12 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

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ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: SB-4-29.5-30 Lab ID: 10225201002 Collected: 04/08/13 14:15 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 16.1 1 04/15/13 08:09 04/17/13 04:38 Motor Oil Range ND mg/kg 21.4 1 04/15/13 08:09 04/17/13 04:38 Surrogates n-Pentacosane (S) 117 % 50-150 1 04/15/13 08:09 04/17/13 04:38 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 5.5 1 04/12/13 13:39 04/15/13 13:49 Surrogates a,a,a-Trifluorotoluene (S) 98 % 66-125 1 04/12/13 13:39 04/15/13 13:49 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 6.6 mg/kg 0.92 1 04/19/13 07:23 04/22/13 15:38 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 7.5 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A Acetone ND ug/kg 17.7 1 04/12/13 11:56 04/19/13 21:23 67-64-1 Allyl chloride ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 107-05-1 Benzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 71-43-2 Bromobenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 108-86-1 Bromochloromethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 74-97-5 Bromodichloromethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 75-27-4 Bromoform ND ug/kg 17.7 1 04/12/13 11:56 04/19/13 21:23 75-25-2 Bromomethane ND ug/kg 17.7 1 04/12/13 11:56 04/19/13 21:23 74-83-9 2-Butanone (MEK) ND ug/kg 17.7 1 04/12/13 11:56 04/19/13 21:23 78-93-3 n-Butylbenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 104-51-8 sec-Butylbenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 135-98-8 tert-Butylbenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 98-06-6 Carbon tetrachloride ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 56-23-5 Chlorobenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 108-90-7 Chloroethane ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 75-00-3 Chloroform ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 67-66-3 Chloromethane ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 74-87-3 2-Chlorotoluene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 95-49-8 4-Chlorotoluene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 96-12-8 Dibromochloromethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 106-93-4 Dibromomethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 74-95-3 1,2-Dichlorobenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 95-50-1 1,3-Dichlorobenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 541-73-1 1,4-Dichlorobenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 106-46-7 Dichlorodifluoromethane ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 75-71-8 1,1-Dichloroethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 13 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 13 of 46 #=AR#

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ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 107-06-2 1,1-Dichloroethene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 75-35-4 cis-1,2-Dichloroethene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 156-59-2 trans-1,2-Dichloroethene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 156-60-5 Dichlorofluoromethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 75-43-4 1,2-Dichloropropane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 78-87-5 1,3-Dichloropropane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 142-28-9 2,2-Dichloropropane ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 594-20-7 1,1-Dichloropropene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 563-58-6 cis-1,3-Dichloropropene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 60-29-7 Ethylbenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 98-82-8 p-Isopropyltoluene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 99-87-6 Methylene Chloride ND ug/kg 17.7 1 04/12/13 11:56 04/19/13 21:23 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 17.7 1 04/12/13 11:56 04/19/13 21:23 108-10-1 Methyl-tert-butyl ether ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 1634-04-4 Naphthalene ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 91-20-3 n-Propylbenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 103-65-1 Styrene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 79-34-5 Tetrachloroethene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 127-18-4 Tetrahydrofuran ND ug/kg 35.4 1 04/12/13 11:56 04/19/13 21:23 109-99-9 Toluene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 120-82-1 1,1,1-Trichloroethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 71-55-6 1,1,2-Trichloroethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 79-00-5 Trichloroethene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 79-01-6 Trichlorofluoromethane ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:23 75-69-4 1,2,3-Trichloropropane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 108-67-8 Vinyl chloride ND ug/kg 3.5 1 04/12/13 11:56 04/19/13 21:23 75-01-4 Xylene (Total) ND ug/kg 10.6 1 04/12/13 11:56 04/19/13 21:23 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 87 % 30-150 1 04/12/13 11:56 04/19/13 21:23 17060-07-0 Toluene-d8 (S) 97 % 30-150 1 04/12/13 11:56 04/19/13 21:23 2037-26-5 4-Bromofluorobenzene (S) 103 % 30-150 1 04/12/13 11:56 04/19/13 21:23 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 14 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 14 of 46 #=AR#

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ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: SB-4-40-41 Lab ID: 10225201003 Collected: 04/08/13 15:00 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 16.3 1 04/15/13 08:09 04/17/13 05:00 Motor Oil Range ND mg/kg 21.7 1 04/15/13 08:09 04/17/13 05:00 Surrogates n-Pentacosane (S) 91 % 50-150 1 04/15/13 08:09 04/17/13 05:00 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 5.3 1 04/12/13 13:39 04/15/13 14:09 Surrogates a,a,a-Trifluorotoluene (S) 100 % 66-125 1 04/12/13 13:39 04/15/13 14:09 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 5.8 mg/kg 0.82 1 04/19/13 07:23 04/22/13 15:43 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 8.8 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A Acetone ND ug/kg 14.9 1 04/12/13 11:56 04/19/13 21:41 67-64-1 Allyl chloride ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 107-05-1 Benzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 71-43-2 Bromobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 108-86-1 Bromochloromethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 74-97-5 Bromodichloromethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 75-27-4 Bromoform ND ug/kg 14.9 1 04/12/13 11:56 04/19/13 21:41 75-25-2 Bromomethane ND ug/kg 14.9 1 04/12/13 11:56 04/19/13 21:41 74-83-9 2-Butanone (MEK) ND ug/kg 14.9 1 04/12/13 11:56 04/19/13 21:41 78-93-3 n-Butylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 104-51-8 sec-Butylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 135-98-8 tert-Butylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 98-06-6 Carbon tetrachloride ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 56-23-5 Chlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 108-90-7 Chloroethane ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 75-00-3 Chloroform ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 67-66-3 Chloromethane ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 74-87-3 2-Chlorotoluene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 95-49-8 4-Chlorotoluene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 96-12-8 Dibromochloromethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 106-93-4 Dibromomethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 74-95-3 1,2-Dichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 95-50-1 1,3-Dichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 541-73-1 1,4-Dichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 106-46-7 Dichlorodifluoromethane ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 75-71-8 1,1-Dichloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 15 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 15 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 107-06-2 1,1-Dichloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 75-35-4 cis-1,2-Dichloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 156-59-2 trans-1,2-Dichloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 156-60-5 Dichlorofluoromethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 75-43-4 1,2-Dichloropropane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 78-87-5 1,3-Dichloropropane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 142-28-9 2,2-Dichloropropane ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 594-20-7 1,1-Dichloropropene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 563-58-6 cis-1,3-Dichloropropene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 60-29-7 Ethylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 98-82-8 p-Isopropyltoluene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 99-87-6 Methylene Chloride ND ug/kg 14.9 1 04/12/13 11:56 04/19/13 21:41 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 14.9 1 04/12/13 11:56 04/19/13 21:41 108-10-1 Methyl-tert-butyl ether ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 1634-04-4 Naphthalene ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 91-20-3 n-Propylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 103-65-1 Styrene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 79-34-5 Tetrachloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 127-18-4 Tetrahydrofuran ND ug/kg 29.7 1 04/12/13 11:56 04/19/13 21:41 109-99-9 Toluene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 120-82-1 1,1,1-Trichloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 71-55-6 1,1,2-Trichloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 79-00-5 Trichloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 79-01-6 Trichlorofluoromethane ND ug/kg 7.4 1 04/12/13 11:56 04/19/13 21:41 75-69-4 1,2,3-Trichloropropane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 108-67-8 Vinyl chloride ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 21:41 75-01-4 Xylene (Total) ND ug/kg 8.9 1 04/12/13 11:56 04/19/13 21:41 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 87 % 30-150 1 04/12/13 11:56 04/19/13 21:41 17060-07-0 Toluene-d8 (S) 97 % 30-150 1 04/12/13 11:56 04/19/13 21:41 2037-26-5 4-Bromofluorobenzene (S) 98 % 30-150 1 04/12/13 11:56 04/19/13 21:41 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 16 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 16 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: MW-3-5-5.5 Lab ID: 10225201004 Collected: 04/08/13 14:00 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 16.4 1 04/15/13 08:09 04/17/13 09:51 Motor Oil Range ND mg/kg 21.8 1 04/15/13 08:09 04/17/13 09:51 Surrogates n-Pentacosane (S) 87 % 50-150 1 04/15/13 08:09 04/17/13 09:51 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 5.3 1 04/12/13 13:39 04/15/13 14:28 Surrogates a,a,a-Trifluorotoluene (S) 101 % 66-125 1 04/12/13 13:39 04/15/13 14:28 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 8.9 mg/kg 1.0 1 04/19/13 07:23 04/22/13 15:48 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 8.7 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A Acetone ND ug/kg 21.8 1 04/12/13 11:56 04/19/13 22:00 67-64-1 Allyl chloride ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 107-05-1 Benzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 71-43-2 Bromobenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 108-86-1 Bromochloromethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 74-97-5 Bromodichloromethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 75-27-4 Bromoform ND ug/kg 21.8 1 04/12/13 11:56 04/19/13 22:00 75-25-2 Bromomethane ND ug/kg 21.8 1 04/12/13 11:56 04/19/13 22:00 74-83-9 2-Butanone (MEK) ND ug/kg 21.8 1 04/12/13 11:56 04/19/13 22:00 78-93-3 n-Butylbenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 104-51-8 sec-Butylbenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 135-98-8 tert-Butylbenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 98-06-6 Carbon tetrachloride ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 56-23-5 Chlorobenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 108-90-7 Chloroethane ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 75-00-3 Chloroform ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 67-66-3 Chloromethane ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 74-87-3 2-Chlorotoluene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 95-49-8 4-Chlorotoluene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 96-12-8 Dibromochloromethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 106-93-4 Dibromomethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 74-95-3 1,2-Dichlorobenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 95-50-1 1,3-Dichlorobenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 541-73-1 1,4-Dichlorobenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 106-46-7 Dichlorodifluoromethane ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 75-71-8 1,1-Dichloroethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 17 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 17 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 107-06-2 1,1-Dichloroethene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 75-35-4 cis-1,2-Dichloroethene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 156-59-2 trans-1,2-Dichloroethene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 156-60-5 Dichlorofluoromethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 75-43-4 1,2-Dichloropropane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 78-87-5 1,3-Dichloropropane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 142-28-9 2,2-Dichloropropane ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 594-20-7 1,1-Dichloropropene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 563-58-6 cis-1,3-Dichloropropene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 60-29-7 Ethylbenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 98-82-8 p-Isopropyltoluene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 99-87-6 Methylene Chloride ND ug/kg 21.8 1 04/12/13 11:56 04/19/13 22:00 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 21.8 1 04/12/13 11:56 04/19/13 22:00 108-10-1 Methyl-tert-butyl ether ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 1634-04-4 Naphthalene ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 91-20-3 n-Propylbenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 103-65-1 Styrene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 79-34-5 Tetrachloroethene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 127-18-4 Tetrahydrofuran ND ug/kg 43.6 1 04/12/13 11:56 04/19/13 22:00 109-99-9 Toluene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 120-82-1 1,1,1-Trichloroethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 71-55-6 1,1,2-Trichloroethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 79-00-5 Trichloroethene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 79-01-6 Trichlorofluoromethane ND ug/kg 10.9 1 04/12/13 11:56 04/19/13 22:00 75-69-4 1,2,3-Trichloropropane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 108-67-8 Vinyl chloride ND ug/kg 4.4 1 04/12/13 11:56 04/19/13 22:00 75-01-4 Xylene (Total) ND ug/kg 13.1 1 04/12/13 11:56 04/19/13 22:00 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 88 % 30-150 1 04/12/13 11:56 04/19/13 22:00 17060-07-0 Toluene-d8 (S) 97 % 30-150 1 04/12/13 11:56 04/19/13 22:00 2037-26-5 4-Bromofluorobenzene (S) 100 % 30-150 1 04/12/13 11:56 04/19/13 22:00 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 18 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 18 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: MW-3-32-33 Lab ID: 10225201005 Collected: 04/09/13 11:00 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 16.7 1 04/15/13 08:09 04/17/13 05:22 Motor Oil Range ND mg/kg 22.2 1 04/15/13 08:09 04/17/13 05:22 Surrogates n-Pentacosane (S) 106 % 50-150 1 04/15/13 08:09 04/17/13 05:22 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 5.7 1 04/12/13 13:39 04/15/13 14:48 Surrogates a,a,a-Trifluorotoluene (S) 99 % 66-125 1 04/12/13 13:39 04/15/13 14:48 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 7.3 mg/kg 0.97 1 04/19/13 07:23 04/22/13 16:02 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 11.2 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A Acetone ND ug/kg 15.1 1 04/12/13 11:56 04/19/13 22:18 67-64-1 Allyl chloride ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 107-05-1 Benzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 71-43-2 Bromobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 108-86-1 Bromochloromethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 74-97-5 Bromodichloromethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 75-27-4 Bromoform ND ug/kg 15.1 1 04/12/13 11:56 04/19/13 22:18 75-25-2 Bromomethane ND ug/kg 15.1 1 04/12/13 11:56 04/19/13 22:18 74-83-9 2-Butanone (MEK) ND ug/kg 15.1 1 04/12/13 11:56 04/19/13 22:18 78-93-3 n-Butylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 104-51-8 sec-Butylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 135-98-8 tert-Butylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 98-06-6 Carbon tetrachloride ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 56-23-5 Chlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 108-90-7 Chloroethane ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 75-00-3 Chloroform ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 67-66-3 Chloromethane ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 74-87-3 2-Chlorotoluene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 95-49-8 4-Chlorotoluene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 96-12-8 Dibromochloromethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 106-93-4 Dibromomethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 74-95-3 1,2-Dichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 95-50-1 1,3-Dichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 541-73-1 1,4-Dichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 106-46-7 Dichlorodifluoromethane ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 75-71-8 1,1-Dichloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 19 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 19 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 107-06-2 1,1-Dichloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 75-35-4 cis-1,2-Dichloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 156-59-2 trans-1,2-Dichloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 156-60-5 Dichlorofluoromethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 75-43-4 1,2-Dichloropropane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 78-87-5 1,3-Dichloropropane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 142-28-9 2,2-Dichloropropane ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 594-20-7 1,1-Dichloropropene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 563-58-6 cis-1,3-Dichloropropene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 60-29-7 Ethylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 98-82-8 p-Isopropyltoluene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 99-87-6 Methylene Chloride ND ug/kg 15.1 1 04/12/13 11:56 04/19/13 22:18 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 15.1 1 04/12/13 11:56 04/19/13 22:18 108-10-1 Methyl-tert-butyl ether ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 1634-04-4 Naphthalene ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 91-20-3 n-Propylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 103-65-1 Styrene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 79-34-5 Tetrachloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 127-18-4 Tetrahydrofuran ND ug/kg 30.3 1 04/12/13 11:56 04/19/13 22:18 109-99-9 Toluene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 120-82-1 1,1,1-Trichloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 71-55-6 1,1,2-Trichloroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 79-00-5 Trichloroethene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 79-01-6 Trichlorofluoromethane ND ug/kg 7.6 1 04/12/13 11:56 04/19/13 22:18 75-69-4 1,2,3-Trichloropropane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 108-67-8 Vinyl chloride ND ug/kg 3.0 1 04/12/13 11:56 04/19/13 22:18 75-01-4 Xylene (Total) ND ug/kg 9.1 1 04/12/13 11:56 04/19/13 22:18 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 86 % 30-150 1 04/12/13 11:56 04/19/13 22:18 17060-07-0 Toluene-d8 (S) 95 % 30-150 1 04/12/13 11:56 04/19/13 22:18 2037-26-5 4-Bromofluorobenzene (S) 100 % 30-150 1 04/12/13 11:56 04/19/13 22:18 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 20 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 20 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: SB-5-6.5-7 Lab ID: 10225201006 Collected: 04/10/13 12:00 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 16.4 1 04/15/13 08:09 04/17/13 05:44 Motor Oil Range ND mg/kg 21.8 1 04/15/13 08:09 04/17/13 05:44 Surrogates n-Pentacosane (S) 89 % 50-150 1 04/15/13 08:09 04/17/13 05:44 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 5.8 1 04/12/13 13:39 04/15/13 15:08 Surrogates a,a,a-Trifluorotoluene (S) 101 % 66-125 1 04/12/13 13:39 04/15/13 15:08 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 12.7 mg/kg 0.99 1 04/19/13 07:23 04/22/13 16:07 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 8.4 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A Acetone ND ug/kg 19.0 1 04/12/13 11:56 04/19/13 22:37 67-64-1 Allyl chloride ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 107-05-1 Benzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 71-43-2 Bromobenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 108-86-1 Bromochloromethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 74-97-5 Bromodichloromethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 75-27-4 Bromoform ND ug/kg 19.0 1 04/12/13 11:56 04/19/13 22:37 75-25-2 Bromomethane ND ug/kg 19.0 1 04/12/13 11:56 04/19/13 22:37 74-83-9 2-Butanone (MEK) ND ug/kg 19.0 1 04/12/13 11:56 04/19/13 22:37 78-93-3 n-Butylbenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 104-51-8 sec-Butylbenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 135-98-8 tert-Butylbenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 98-06-6 Carbon tetrachloride ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 56-23-5 Chlorobenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 108-90-7 Chloroethane ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 75-00-3 Chloroform ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 67-66-3 Chloromethane ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 74-87-3 2-Chlorotoluene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 95-49-8 4-Chlorotoluene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 96-12-8 Dibromochloromethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 106-93-4 Dibromomethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 74-95-3 1,2-Dichlorobenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 95-50-1 1,3-Dichlorobenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 541-73-1 1,4-Dichlorobenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 106-46-7 Dichlorodifluoromethane ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 75-71-8 1,1-Dichloroethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 21 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 21 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 107-06-2 1,1-Dichloroethene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 75-35-4 cis-1,2-Dichloroethene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 156-59-2 trans-1,2-Dichloroethene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 156-60-5 Dichlorofluoromethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 75-43-4 1,2-Dichloropropane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 78-87-5 1,3-Dichloropropane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 142-28-9 2,2-Dichloropropane ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 594-20-7 1,1-Dichloropropene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 563-58-6 cis-1,3-Dichloropropene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 60-29-7 Ethylbenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 98-82-8 p-Isopropyltoluene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 99-87-6 Methylene Chloride ND ug/kg 19.0 1 04/12/13 11:56 04/19/13 22:37 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 19.0 1 04/12/13 11:56 04/19/13 22:37 108-10-1 Methyl-tert-butyl ether ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 1634-04-4 Naphthalene ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 91-20-3 n-Propylbenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 103-65-1 Styrene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 79-34-5 Tetrachloroethene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 127-18-4 Tetrahydrofuran ND ug/kg 37.9 1 04/12/13 11:56 04/19/13 22:37 109-99-9 Toluene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 120-82-1 1,1,1-Trichloroethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 71-55-6 1,1,2-Trichloroethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 79-00-5 Trichloroethene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 79-01-6 Trichlorofluoromethane ND ug/kg 9.5 1 04/12/13 11:56 04/19/13 22:37 75-69-4 1,2,3-Trichloropropane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 108-67-8 Vinyl chloride ND ug/kg 3.8 1 04/12/13 11:56 04/19/13 22:37 75-01-4 Xylene (Total) ND ug/kg 11.4 1 04/12/13 11:56 04/19/13 22:37 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 87 % 30-150 1 04/12/13 11:56 04/19/13 22:37 17060-07-0 Toluene-d8 (S) 97 % 30-150 1 04/12/13 11:56 04/19/13 22:37 2037-26-5 4-Bromofluorobenzene (S) 99 % 30-150 1 04/12/13 11:56 04/19/13 22:37 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 22 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 22 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: SB-5-9-10 Lab ID: 10225201007 Collected: 04/10/13 12:50 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 16.4 1 04/15/13 08:09 04/17/13 06:06 Motor Oil Range ND mg/kg 21.8 1 04/15/13 08:09 04/17/13 06:06 Surrogates n-Pentacosane (S) 111 % 50-150 1 04/15/13 08:09 04/17/13 06:06 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 5.2 1 04/12/13 13:39 04/15/13 15:27 Surrogates a,a,a-Trifluorotoluene (S) 99 % 66-125 1 04/12/13 13:39 04/15/13 15:27 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 10.6 mg/kg 0.86 1 04/19/13 07:23 04/22/13 16:12 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 9.5 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A Acetone ND ug/kg 18.3 1 04/12/13 11:56 04/19/13 22:55 67-64-1 Allyl chloride ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 107-05-1 Benzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 71-43-2 Bromobenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 108-86-1 Bromochloromethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 74-97-5 Bromodichloromethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 75-27-4 Bromoform ND ug/kg 18.3 1 04/12/13 11:56 04/19/13 22:55 75-25-2 Bromomethane ND ug/kg 18.3 1 04/12/13 11:56 04/19/13 22:55 74-83-9 2-Butanone (MEK) ND ug/kg 18.3 1 04/12/13 11:56 04/19/13 22:55 78-93-3 n-Butylbenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 104-51-8 sec-Butylbenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 135-98-8 tert-Butylbenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 98-06-6 Carbon tetrachloride ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 56-23-5 Chlorobenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 108-90-7 Chloroethane ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 75-00-3 Chloroform ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 67-66-3 Chloromethane ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 74-87-3 2-Chlorotoluene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 95-49-8 4-Chlorotoluene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 96-12-8 Dibromochloromethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 106-93-4 Dibromomethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 74-95-3 1,2-Dichlorobenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 95-50-1 1,3-Dichlorobenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 541-73-1 1,4-Dichlorobenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 106-46-7 Dichlorodifluoromethane ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 75-71-8 1,1-Dichloroethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 23 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 23 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 107-06-2 1,1-Dichloroethene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 75-35-4 cis-1,2-Dichloroethene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 156-59-2 trans-1,2-Dichloroethene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 156-60-5 Dichlorofluoromethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 75-43-4 1,2-Dichloropropane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 78-87-5 1,3-Dichloropropane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 142-28-9 2,2-Dichloropropane ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 594-20-7 1,1-Dichloropropene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 563-58-6 cis-1,3-Dichloropropene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 60-29-7 Ethylbenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 98-82-8 p-Isopropyltoluene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 99-87-6 Methylene Chloride ND ug/kg 18.3 1 04/12/13 11:56 04/19/13 22:55 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 18.3 1 04/12/13 11:56 04/19/13 22:55 108-10-1 Methyl-tert-butyl ether ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 1634-04-4 Naphthalene ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 91-20-3 n-Propylbenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 103-65-1 Styrene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 79-34-5 Tetrachloroethene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 127-18-4 Tetrahydrofuran ND ug/kg 36.7 1 04/12/13 11:56 04/19/13 22:55 109-99-9 Toluene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 120-82-1 1,1,1-Trichloroethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 71-55-6 1,1,2-Trichloroethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 79-00-5 Trichloroethene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 79-01-6 Trichlorofluoromethane ND ug/kg 9.2 1 04/12/13 11:56 04/19/13 22:55 75-69-4 1,2,3-Trichloropropane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 108-67-8 Vinyl chloride ND ug/kg 3.7 1 04/12/13 11:56 04/19/13 22:55 75-01-4 Xylene (Total) ND ug/kg 11.0 1 04/12/13 11:56 04/19/13 22:55 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 86 % 30-150 1 04/12/13 11:56 04/19/13 22:55 17060-07-0 Toluene-d8 (S) 97 % 30-150 1 04/12/13 11:56 04/19/13 22:55 2037-26-5 4-Bromofluorobenzene (S) 100 % 30-150 1 04/12/13 11:56 04/19/13 22:55 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 24 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 24 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: MW-2-5.5-6 Lab ID: 10225201008 Collected: 04/11/13 08:45 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 17.6 1 04/15/13 08:09 04/17/13 06:28 Motor Oil Range ND mg/kg 23.5 1 04/15/13 08:09 04/17/13 06:28 Surrogates n-Pentacosane (S) 101 % 50-150 1 04/15/13 08:09 04/17/13 06:28 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 6.3 1 04/12/13 13:39 04/15/13 15:47 Surrogates a,a,a-Trifluorotoluene (S) 102 % 66-125 1 04/12/13 13:39 04/15/13 15:47 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 10.5 mg/kg 1.0 1 04/19/13 07:23 04/22/13 16:17 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 15.5 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A Acetone ND ug/kg 16.5 1 04/12/13 11:56 04/19/13 23:14 67-64-1 Allyl chloride ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 107-05-1 Benzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 71-43-2 Bromobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 108-86-1 Bromochloromethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 74-97-5 Bromodichloromethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 75-27-4 Bromoform ND ug/kg 16.5 1 04/12/13 11:56 04/19/13 23:14 75-25-2 Bromomethane ND ug/kg 16.5 1 04/12/13 11:56 04/19/13 23:14 74-83-9 2-Butanone (MEK) ND ug/kg 16.5 1 04/12/13 11:56 04/19/13 23:14 78-93-3 n-Butylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 104-51-8 sec-Butylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 135-98-8 tert-Butylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 98-06-6 Carbon tetrachloride ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 56-23-5 Chlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 108-90-7 Chloroethane ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 75-00-3 Chloroform ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 67-66-3 Chloromethane ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 74-87-3 2-Chlorotoluene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 95-49-8 4-Chlorotoluene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 96-12-8 Dibromochloromethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 106-93-4 Dibromomethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 74-95-3 1,2-Dichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 95-50-1 1,3-Dichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 541-73-1 1,4-Dichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 106-46-7 Dichlorodifluoromethane ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 75-71-8 1,1-Dichloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 25 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 25 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 107-06-2 1,1-Dichloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 75-35-4 cis-1,2-Dichloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 156-59-2 trans-1,2-Dichloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 156-60-5 Dichlorofluoromethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 75-43-4 1,2-Dichloropropane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 78-87-5 1,3-Dichloropropane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 142-28-9 2,2-Dichloropropane ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 594-20-7 1,1-Dichloropropene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 563-58-6 cis-1,3-Dichloropropene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 60-29-7 Ethylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 98-82-8 p-Isopropyltoluene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 99-87-6 Methylene Chloride ND ug/kg 16.5 1 04/12/13 11:56 04/19/13 23:14 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 16.5 1 04/12/13 11:56 04/19/13 23:14 108-10-1 Methyl-tert-butyl ether ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 1634-04-4 Naphthalene ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 91-20-3 n-Propylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 103-65-1 Styrene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 79-34-5 Tetrachloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 127-18-4 Tetrahydrofuran ND ug/kg 33.0 1 04/12/13 11:56 04/19/13 23:14 109-99-9 Toluene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 120-82-1 1,1,1-Trichloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 71-55-6 1,1,2-Trichloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 79-00-5 Trichloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 79-01-6 Trichlorofluoromethane ND ug/kg 8.2 1 04/12/13 11:56 04/19/13 23:14 75-69-4 1,2,3-Trichloropropane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 108-67-8 Vinyl chloride ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:14 75-01-4 Xylene (Total) ND ug/kg 9.9 1 04/12/13 11:56 04/19/13 23:14 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 87 % 30-150 1 04/12/13 11:56 04/19/13 23:14 17060-07-0 Toluene-d8 (S) 95 % 30-150 1 04/12/13 11:56 04/19/13 23:14 2037-26-5 4-Bromofluorobenzene (S) 100 % 30-150 1 04/12/13 11:56 04/19/13 23:14 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 26 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 26 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: MW-2-30-31 Lab ID: 10225201009 Collected: 04/11/13 11:45 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 17.1 1 04/15/13 08:09 04/17/13 06:50 Motor Oil Range ND mg/kg 22.8 1 04/15/13 08:09 04/17/13 06:50 Surrogates n-Pentacosane (S) 121 % 50-150 1 04/15/13 08:09 04/17/13 06:50 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 5.4 1 04/12/13 13:39 04/15/13 16:06 Surrogates a,a,a-Trifluorotoluene (S) 100 % 66-125 1 04/12/13 13:39 04/15/13 16:06 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 8.1 mg/kg 0.86 1 04/19/13 07:23 04/22/13 16:22 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 13.3 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A Acetone ND ug/kg 15.5 1 04/12/13 11:56 04/19/13 23:32 67-64-1 Allyl chloride ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 107-05-1 Benzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 71-43-2 Bromobenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 108-86-1 Bromochloromethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 74-97-5 Bromodichloromethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 75-27-4 Bromoform ND ug/kg 15.5 1 04/12/13 11:56 04/19/13 23:32 75-25-2 Bromomethane ND ug/kg 15.5 1 04/12/13 11:56 04/19/13 23:32 74-83-9 2-Butanone (MEK) ND ug/kg 15.5 1 04/12/13 11:56 04/19/13 23:32 78-93-3 n-Butylbenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 104-51-8 sec-Butylbenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 135-98-8 tert-Butylbenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 98-06-6 Carbon tetrachloride ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 56-23-5 Chlorobenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 108-90-7 Chloroethane ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 75-00-3 Chloroform ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 67-66-3 Chloromethane ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 74-87-3 2-Chlorotoluene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 95-49-8 4-Chlorotoluene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 96-12-8 Dibromochloromethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 106-93-4 Dibromomethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 74-95-3 1,2-Dichlorobenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 95-50-1 1,3-Dichlorobenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 541-73-1 1,4-Dichlorobenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 106-46-7 Dichlorodifluoromethane ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 75-71-8 1,1-Dichloroethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 27 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 27 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 107-06-2 1,1-Dichloroethene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 75-35-4 cis-1,2-Dichloroethene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 156-59-2 trans-1,2-Dichloroethene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 156-60-5 Dichlorofluoromethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 75-43-4 1,2-Dichloropropane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 78-87-5 1,3-Dichloropropane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 142-28-9 2,2-Dichloropropane ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 594-20-7 1,1-Dichloropropene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 563-58-6 cis-1,3-Dichloropropene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 60-29-7 Ethylbenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 98-82-8 p-Isopropyltoluene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 99-87-6 Methylene Chloride ND ug/kg 15.5 1 04/12/13 11:56 04/19/13 23:32 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 15.5 1 04/12/13 11:56 04/19/13 23:32 108-10-1 Methyl-tert-butyl ether ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 1634-04-4 Naphthalene ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 91-20-3 n-Propylbenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 103-65-1 Styrene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 79-34-5 Tetrachloroethene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 127-18-4 Tetrahydrofuran ND ug/kg 30.9 1 04/12/13 11:56 04/19/13 23:32 109-99-9 Toluene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 120-82-1 1,1,1-Trichloroethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 71-55-6 1,1,2-Trichloroethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 79-00-5 Trichloroethene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 79-01-6 Trichlorofluoromethane ND ug/kg 7.7 1 04/12/13 11:56 04/19/13 23:32 75-69-4 1,2,3-Trichloropropane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 108-67-8 Vinyl chloride ND ug/kg 3.1 1 04/12/13 11:56 04/19/13 23:32 75-01-4 Xylene (Total) ND ug/kg 9.3 1 04/12/13 11:56 04/19/13 23:32 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 85 % 30-150 1 04/12/13 11:56 04/19/13 23:32 17060-07-0 Toluene-d8 (S) 97 % 30-150 1 04/12/13 11:56 04/19/13 23:32 2037-26-5 4-Bromofluorobenzene (S) 101 % 30-150 1 04/12/13 11:56 04/19/13 23:32 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 28 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 28 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: BD Lab ID: 10225201010 Collected: 04/08/13 00:00 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "dry-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

NWTPH-Dx GCS Analytical Method: NWTPH-Dx Preparation Method: EPA 3546 Diesel Fuel Range ND mg/kg 16.9 1 04/15/13 08:09 04/17/13 08:42 Motor Oil Range ND mg/kg 22.5 1 04/15/13 08:09 04/17/13 08:42 Surrogates n-Pentacosane (S) 111 % 50-150 1 04/15/13 08:09 04/17/13 08:42 629-99-2

NWTPH-Gx/8021 GCV Analytical Method: NWTPH-Gx/8021 Preparation Method: NWTPH-Gx/8021 TPH as Gas ND mg/kg 5.8 1 04/12/13 13:39 04/15/13 17:40 Surrogates a,a,a-Trifluorotoluene (S) 99 % 66-125 1 04/12/13 13:39 04/15/13 17:40 98-08-8

6010 MET ICP Analytical Method: EPA 6010 Preparation Method: EPA 3050

Lead 7.7 mg/kg 0.79 1 04/19/13 07:23 04/22/13 16:27 7439-92-1

Dry Weight Analytical Method: ASTM D2974

Percent Moisture 11.3 % 0.10 1 04/15/13 00:00

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A Acetone ND ug/kg 16.3 1 04/12/13 11:56 04/19/13 23:50 67-64-1 Allyl chloride ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 107-05-1 Benzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 71-43-2 Bromobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 108-86-1 Bromochloromethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 74-97-5 Bromodichloromethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 75-27-4 Bromoform ND ug/kg 16.3 1 04/12/13 11:56 04/19/13 23:50 75-25-2 Bromomethane ND ug/kg 16.3 1 04/12/13 11:56 04/19/13 23:50 74-83-9 2-Butanone (MEK) ND ug/kg 16.3 1 04/12/13 11:56 04/19/13 23:50 78-93-3 n-Butylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 104-51-8 sec-Butylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 135-98-8 tert-Butylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 98-06-6 Carbon tetrachloride ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 56-23-5 Chlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 108-90-7 Chloroethane ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 75-00-3 Chloroform ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 67-66-3 Chloromethane ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 74-87-3 2-Chlorotoluene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 95-49-8 4-Chlorotoluene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 106-43-4 1,2-Dibromo-3-chloropropane ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 96-12-8 Dibromochloromethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 124-48-1 1,2-Dibromoethane (EDB) ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 106-93-4 Dibromomethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 74-95-3 1,2-Dichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 95-50-1 1,3-Dichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 541-73-1 1,4-Dichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 106-46-7 Dichlorodifluoromethane ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 75-71-8 1,1-Dichloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 75-34-3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 29 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 29 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

8260 MSV 5035 Low Level Analytical Method: EPA 8260 Preparation Method: EPA 5035A 1,2-Dichloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 107-06-2 1,1-Dichloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 75-35-4 cis-1,2-Dichloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 156-59-2 trans-1,2-Dichloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 156-60-5 Dichlorofluoromethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 75-43-4 1,2-Dichloropropane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 78-87-5 1,3-Dichloropropane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 142-28-9 2,2-Dichloropropane ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 594-20-7 1,1-Dichloropropene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 563-58-6 cis-1,3-Dichloropropene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 10061-01-5 trans-1,3-Dichloropropene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 10061-02-6 Diethyl ether (Ethyl ether) ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 60-29-7 Ethylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 100-41-4 Hexachloro-1,3-butadiene ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 87-68-3 Isopropylbenzene (Cumene) ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 98-82-8 p-Isopropyltoluene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 99-87-6 Methylene Chloride ND ug/kg 16.3 1 04/12/13 11:56 04/19/13 23:50 75-09-2 4-Methyl-2-pentanone (MIBK) ND ug/kg 16.3 1 04/12/13 11:56 04/19/13 23:50 108-10-1 Methyl-tert-butyl ether ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 1634-04-4 Naphthalene ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 91-20-3 n-Propylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 103-65-1 Styrene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 100-42-5 1,1,1,2-Tetrachloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 630-20-6 1,1,2,2-Tetrachloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 79-34-5 Tetrachloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 127-18-4 Tetrahydrofuran ND ug/kg 32.6 1 04/12/13 11:56 04/19/13 23:50 109-99-9 Toluene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 108-88-3 1,2,3-Trichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 87-61-6 1,2,4-Trichlorobenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 120-82-1 1,1,1-Trichloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 71-55-6 1,1,2-Trichloroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 79-00-5 Trichloroethene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 79-01-6 Trichlorofluoromethane ND ug/kg 8.1 1 04/12/13 11:56 04/19/13 23:50 75-69-4 1,2,3-Trichloropropane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 96-18-4 1,1,2-Trichlorotrifluoroethane ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 76-13-1 1,2,4-Trimethylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 95-63-6 1,3,5-Trimethylbenzene ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 108-67-8 Vinyl chloride ND ug/kg 3.3 1 04/12/13 11:56 04/19/13 23:50 75-01-4 Xylene (Total) ND ug/kg 9.8 1 04/12/13 11:56 04/19/13 23:50 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 87 % 30-150 1 04/12/13 11:56 04/19/13 23:50 17060-07-0 Toluene-d8 (S) 97 % 30-150 1 04/12/13 11:56 04/19/13 23:50 2037-26-5 4-Bromofluorobenzene (S) 101 % 30-150 1 04/12/13 11:56 04/19/13 23:50 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 30 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 30 of 46 #=AR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

ANALYTICAL RESULTS

Project: WA-06008 Pace Project No.: 10225201

Sample: Trip Blank Lab ID: 10225201011 Collected: 04/08/13 00:00 Received: 04/12/13 09:05 Matrix: Solid Results reported on a "wet-weight" basis Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual

8260 MSV 5030 Med Level Analytical Method: EPA 8260 Preparation Method: EPA 5035/5030B Benzene ND ug/kg 20.0 1 04/22/13 16:25 04/22/13 17:09 71-43-2 Ethylbenzene ND ug/kg 50.0 1 04/22/13 16:25 04/22/13 17:09 100-41-4 Toluene ND ug/kg 50.0 1 04/22/13 16:25 04/22/13 17:09 108-88-3 Xylene (Total) ND ug/kg 150 1 04/22/13 16:25 04/22/13 17:09 1330-20-7 Surrogates 1,2-Dichloroethane-d4 (S) 93 % 57-150 1 04/22/13 16:25 04/22/13 17:09 17060-07-0 Toluene-d8 (S) 94 % 70-136 1 04/22/13 16:25 04/22/13 17:09 2037-26-5 4-Bromofluorobenzene (S) 97 % 67-138 1 04/22/13 16:25 04/22/13 17:09 460-00-4

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 31 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 31 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

QC Batch: GCV/10585 Analysis Method: NWTPH-Gx/8021 QC Batch Method: NWTPH-Gx/8021 Analysis Description: NWTPH-Gx Solid GCV Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010

METHOD BLANK: 1408873 Matrix: Solid Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers TPH as Gas mg/kg ND 5.0 04/12/13 19:59 a,a,a-Trifluorotoluene (S) % 102 66-125 04/12/13 19:59

LABORATORY CONTROL SAMPLE & LCSD: 1408874 1408875 Spike LCS LCSD LCS LCSD % Rec Max Parameter Units Conc. Result Result % Rec % Rec Limits RPD RPD Qualifiers TPH as Gas mg/kg 50 43.9 43.9 88 88 75-134 .07 20 a,a,a-Trifluorotoluene (S) % 97 94 66-125

MATRIX SPIKE SAMPLE: 1408876 10224787001 Spike MS MS % Rec Parameter Units Result Conc. Result % Rec Limits Qualifiers TPH as Gas mg/kg 19.8 133 141 91 70-130 a,a,a-Trifluorotoluene (S) % 91 66-125

SAMPLE DUPLICATE: 1408877 10224787003 Dup Max Parameter Units Result Result RPD RPD Qualifiers TPH as Gas mg/kg 186 228 20 30 a,a,a-Trifluorotoluene (S) % 85 81 .3 D3

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 32 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 32 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

QC Batch: MPRP/38520 Analysis Method: EPA 6010 QC Batch Method: EPA 3050 Analysis Description: 6010 MET Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010

METHOD BLANK: 1409644 Matrix: Solid Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Lead mg/kg ND 0.87 04/22/13 15:09

LABORATORY CONTROL SAMPLE: 1409645 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Lead mg/kg 47.6 42.5 89 80-120

MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 1409646 1409647 MS MSD 10225201001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Lead mg/kg 16.9 48.6 44.1 58.6 54.1 86 84 75-125 8 30

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 33 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 33 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

QC Batch: MPRP/38530 Analysis Method: ASTM D2974 QC Batch Method: ASTM D2974 Analysis Description: Dry Weight/Percent Moisture Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010

SAMPLE DUPLICATE: 1409769 10225255001 Dup Max Parameter Units Result Result RPD RPD Qualifiers Percent Moisture % 6.7 5.7 17 30

SAMPLE DUPLICATE: 1409770 10225032001 Dup Max Parameter Units Result Result RPD RPD Qualifiers Percent Moisture % 7.4 7.7 3 30

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 34 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 34 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

QC Batch: MSV/23411 Analysis Method: EPA 8260 QC Batch Method: EPA 8260 Analysis Description: 8260 MSV 5035 Low Level Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010

METHOD BLANK: 1412412 Matrix: Solid Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers 1,1,1,2-Tetrachloroethane ug/kg ND 4.0 04/19/13 20:09 1,1,1-Trichloroethane ug/kg ND 4.0 04/19/13 20:09 1,1,2,2-Tetrachloroethane ug/kg ND 4.0 04/19/13 20:09 1,1,2-Trichloroethane ug/kg ND 4.0 04/19/13 20:09 1,1,2-Trichlorotrifluoroethane ug/kg ND 4.0 04/19/13 20:09 1,1-Dichloroethane ug/kg ND 4.0 04/19/13 20:09 1,1-Dichloroethene ug/kg ND 4.0 04/19/13 20:09 1,1-Dichloropropene ug/kg ND 4.0 04/19/13 20:09 1,2,3-Trichlorobenzene ug/kg ND 4.0 04/19/13 20:09 1,2,3-Trichloropropane ug/kg ND 4.0 04/19/13 20:09 1,2,4-Trichlorobenzene ug/kg ND 4.0 04/19/13 20:09 1,2,4-Trimethylbenzene ug/kg ND 4.0 04/19/13 20:09 1,2-Dibromo-3-chloropropane ug/kg ND 10.0 04/19/13 20:09 1,2-Dibromoethane (EDB) ug/kg ND 4.0 04/19/13 20:09 1,2-Dichlorobenzene ug/kg ND 4.0 04/19/13 20:09 1,2-Dichloroethane ug/kg ND 4.0 04/19/13 20:09 1,2-Dichloropropane ug/kg ND 4.0 04/19/13 20:09 1,3,5-Trimethylbenzene ug/kg ND 4.0 04/19/13 20:09 1,3-Dichlorobenzene ug/kg ND 4.0 04/19/13 20:09 1,3-Dichloropropane ug/kg ND 4.0 04/19/13 20:09 1,4-Dichlorobenzene ug/kg ND 4.0 04/19/13 20:09 2,2-Dichloropropane ug/kg ND 10.0 04/19/13 20:09 2-Butanone (MEK) ug/kg ND 20.0 04/19/13 20:09 2-Chlorotoluene ug/kg ND 4.0 04/19/13 20:09 4-Chlorotoluene ug/kg ND 4.0 04/19/13 20:09 4-Methyl-2-pentanone (MIBK) ug/kg ND 20.0 04/19/13 20:09 Acetone ug/kg ND 20.0 04/19/13 20:09 Allyl chloride ug/kg ND 10.0 04/19/13 20:09 Benzene ug/kg ND 4.0 04/19/13 20:09 Bromobenzene ug/kg ND 4.0 04/19/13 20:09 Bromochloromethane ug/kg ND 4.0 04/19/13 20:09 Bromodichloromethane ug/kg ND 4.0 04/19/13 20:09 Bromoform ug/kg ND 20.0 04/19/13 20:09 Bromomethane ug/kg ND 20.0 04/19/13 20:09 Carbon tetrachloride ug/kg ND 4.0 04/19/13 20:09 Chlorobenzene ug/kg ND 4.0 04/19/13 20:09 Chloroethane ug/kg ND 10.0 04/19/13 20:09 Chloroform ug/kg ND 4.0 04/19/13 20:09 Chloromethane ug/kg ND 10.0 04/19/13 20:09 cis-1,2-Dichloroethene ug/kg ND 4.0 04/19/13 20:09 cis-1,3-Dichloropropene ug/kg ND 4.0 04/19/13 20:09

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 35 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 35 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

METHOD BLANK: 1412412 Matrix: Solid Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Dibromochloromethane ug/kg ND 4.0 04/19/13 20:09 Dibromomethane ug/kg ND 4.0 04/19/13 20:09 Dichlorodifluoromethane ug/kg ND 10.0 04/19/13 20:09 Dichlorofluoromethane ug/kg ND 4.0 04/19/13 20:09 Diethyl ether (Ethyl ether) ug/kg ND 10.0 04/19/13 20:09 Ethylbenzene ug/kg ND 4.0 04/19/13 20:09 Hexachloro-1,3-butadiene ug/kg ND 10.0 04/19/13 20:09 Isopropylbenzene (Cumene) ug/kg ND 4.0 04/19/13 20:09 Methyl-tert-butyl ether ug/kg ND 4.0 04/19/13 20:09 Methylene Chloride ug/kg ND 20.0 04/19/13 20:09 n-Butylbenzene ug/kg ND 4.0 04/19/13 20:09 n-Propylbenzene ug/kg ND 4.0 04/19/13 20:09 Naphthalene ug/kg ND 10.0 04/19/13 20:09 p-Isopropyltoluene ug/kg ND 4.0 04/19/13 20:09 sec-Butylbenzene ug/kg ND 4.0 04/19/13 20:09 Styrene ug/kg ND 4.0 04/19/13 20:09 tert-Butylbenzene ug/kg ND 4.0 04/19/13 20:09 Tetrachloroethene ug/kg ND 4.0 04/19/13 20:09 Tetrahydrofuran ug/kg ND 40.0 04/19/13 20:09 Toluene ug/kg ND 4.0 04/19/13 20:09 trans-1,2-Dichloroethene ug/kg ND 4.0 04/19/13 20:09 trans-1,3-Dichloropropene ug/kg ND 4.0 04/19/13 20:09 Trichloroethene ug/kg ND 4.0 04/19/13 20:09 Trichlorofluoromethane ug/kg ND 10.0 04/19/13 20:09 Vinyl chloride ug/kg ND 4.0 04/19/13 20:09 Xylene (Total) ug/kg ND 12.0 04/19/13 20:09 1,2-Dichloroethane-d4 (S) % 81 30-150 04/19/13 20:09 4-Bromofluorobenzene (S) % 99 30-150 04/19/13 20:09 Toluene-d8 (S) % 99 30-150 04/19/13 20:09

LABORATORY CONTROL SAMPLE: 1412413 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers 1,1,1,2-Tetrachloroethane ug/kg 50 52.8 106 68-128 1,1,1-Trichloroethane ug/kg 50 46.0 92 74-125 1,1,2,2-Tetrachloroethane ug/kg 50 53.6 107 69-127 1,1,2-Trichloroethane ug/kg 50 52.7 105 70-126 1,1,2-Trichlorotrifluoroethane ug/kg 50 52.3 105 64-125 1,1-Dichloroethane ug/kg 50 45.4 91 74-125 1,1-Dichloroethene ug/kg 50 46.9 94 70-125 1,1-Dichloropropene ug/kg 50 46.9 94 72-125 1,2,3-Trichlorobenzene ug/kg 50 55.4 111 68-127 1,2,3-Trichloropropane ug/kg 50 51.9 104 75-125 1,2,4-Trichlorobenzene ug/kg 50 55.4 111 67-130

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 36 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 36 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

LABORATORY CONTROL SAMPLE: 1412413 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers 1,2,4-Trimethylbenzene ug/kg 50 53.6 107 72-125 1,2-Dibromo-3-chloropropane ug/kg 125 133 106 61-128 1,2-Dibromoethane (EDB) ug/kg 50 53.4 107 72-125 1,2-Dichlorobenzene ug/kg 50 52.6 105 70-125 1,2-Dichloroethane ug/kg 50 44.3 89 73-125 1,2-Dichloropropane ug/kg 50 50.6 101 74-125 1,3,5-Trimethylbenzene ug/kg 50 54.0 108 71-125 1,3-Dichlorobenzene ug/kg 50 54.7 109 71-125 1,3-Dichloropropane ug/kg 50 52.4 105 71-125 1,4-Dichlorobenzene ug/kg 50 54.7 109 71-125 2,2-Dichloropropane ug/kg 50 47.7 95 61-130 2-Butanone (MEK) ug/kg 250 224 89 53-126 2-Chlorotoluene ug/kg 50 54.3 109 73-125 4-Chlorotoluene ug/kg 50 54.6 109 74-125 4-Methyl-2-pentanone (MIBK) ug/kg 250 261 104 65-125 Acetone ug/kg 250 254 101 60-129 Allyl chloride ug/kg 50 45.9 92 62-125 Benzene ug/kg 50 44.6 89 70-125 Bromobenzene ug/kg 50 52.6 105 71-125 Bromochloromethane ug/kg 50 45.3 91 74-125 Bromodichloromethane ug/kg 50 50.1 100 66-130 Bromoform ug/kg 50 52.8 106 54-145 Bromomethane ug/kg 50 45.6 91 51-125 Carbon tetrachloride ug/kg 50 45.7 91 68-125 Chlorobenzene ug/kg 50 53.8 108 72-125 Chloroethane ug/kg 50 46.1 92 66-125 Chloroform ug/kg 50 44.7 89 74-125 Chloromethane ug/kg 50 43.1 86 60-125 cis-1,2-Dichloroethene ug/kg 50 45.3 91 75-125 cis-1,3-Dichloropropene ug/kg 50 51.5 103 71-125 Dibromochloromethane ug/kg 50 52.0 104 65-132 Dibromomethane ug/kg 50 49.9 100 67-133 Dichlorodifluoromethane ug/kg 50 58.0 116 39-125 Dichlorofluoromethane ug/kg 50 44.7 89 37-150 Diethyl ether (Ethyl ether) ug/kg 50 45.6 91 65-125 Ethylbenzene ug/kg 50 53.0 106 74-125 Hexachloro-1,3-butadiene ug/kg 50 58.4 117 63-140 Isopropylbenzene (Cumene) ug/kg 50 55.3 111 72-125 Methyl-tert-butyl ether ug/kg 50 44.4 89 70-125 Methylene Chloride ug/kg 50 42.6 85 70-125 n-Butylbenzene ug/kg 50 58.8 118 70-125 n-Propylbenzene ug/kg 50 54.7 109 72-125 Naphthalene ug/kg 50 51.8 104 68-125 p-Isopropyltoluene ug/kg 50 56.7 113 70-125 sec-Butylbenzene ug/kg 50 54.6 109 71-125 Styrene ug/kg 50 53.4 107 72-125 tert-Butylbenzene ug/kg 50 54.6 109 70-125 Tetrachloroethene ug/kg 50 56.5 113 70-125

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 37 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 37 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

LABORATORY CONTROL SAMPLE: 1412413 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Tetrahydrofuran ug/kg 500 524 105 59-125 Toluene ug/kg 50 53.9 108 75-125 trans-1,2-Dichloroethene ug/kg 50 46.3 93 75-125 trans-1,3-Dichloropropene ug/kg 50 53.2 106 71-125 Trichloroethene ug/kg 50 52.0 104 72-125 Trichlorofluoromethane ug/kg 50 48.1 96 64-129 Vinyl chloride ug/kg 50 45.8 92 65-125 Xylene (Total) ug/kg 150 159 106 72-125 1,2-Dichloroethane-d4 (S) % 85 30-150 4-Bromofluorobenzene (S) % 100 30-150 Toluene-d8 (S) % 101 30-150

MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 1412415 1412416 MS MSD 10225009001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual 1,1,1,2-Tetrachloroethane ug/kg ND 63.3 62.8 67.0 64.9 106 103 75-134 3 30 1,1,1-Trichloroethane ug/kg ND 63.3 62.8 58.0 54.6 92 87 70-134 6 30 1,1,2,2-Tetrachloroethane ug/kg ND 63.3 62.8 66.3 64.1 105 102 68-150 3 30 1,1,2-Trichloroethane ug/kg ND 63.3 62.8 64.9 63.5 103 101 67-150 2 30 1,1,2-Trichlorotrifluoroethane ug/kg ND 63.3 62.8 75.0 73.2 119 117 62-148 2 30 1,1-Dichloroethane ug/kg ND 63.3 62.8 55.1 53.1 87 85 66-131 4 30 1,1-Dichloroethene ug/kg ND 63.3 62.8 55.0 52.9 87 84 69-135 4 30 1,1-Dichloropropene ug/kg ND 63.3 62.8 56.4 53.7 89 85 69-132 5 30 1,2,3-Trichlorobenzene ug/kg ND 63.3 62.8 64.2 63.9 101 102 30-150 .5 30 1,2,3-Trichloropropane ug/kg ND 63.3 62.8 63.0 61.4 99 98 68-150 2 30 1,2,4-Trichlorobenzene ug/kg ND 63.3 62.8 63.5 62.7 100 100 30-150 1 30 1,2,4-Trimethylbenzene ug/kg ND 63.3 62.8 64.3 62.3 102 99 65-140 3 30 1,2-Dibromo-3-chloropropane ug/kg ND 159 158 154 152 97 97 58-150 2 30 1,2-Dibromoethane (EDB) ug/kg ND 63.3 62.8 62.5 61.9 99 99 66-137 .9 30 1,2-Dichlorobenzene ug/kg ND 63.3 62.8 65.9 63.4 104 101 63-138 4 30 1,2-Dichloroethane ug/kg ND 63.3 62.8 53.8 51.0 85 81 66-135 5 30 1,2-Dichloropropane ug/kg ND 63.3 62.8 63.7 61.3 101 98 73-131 4 30 1,3,5-Trimethylbenzene ug/kg ND 63.3 62.8 64.9 64.9 103 103 65-141 .08 30 1,3-Dichlorobenzene ug/kg ND 63.3 62.8 65.2 63.1 103 100 61-138 3 30 1,3-Dichloropropane ug/kg ND 63.3 62.8 63.1 61.4 100 98 73-135 3 30 1,4-Dichlorobenzene ug/kg ND 63.3 62.8 64.5 64.0 102 102 60-139 .9 30 2,2-Dichloropropane ug/kg ND 63.3 62.8 59.4 56.4 94 90 59-142 5 30 2-Butanone (MEK) ug/kg ND 316 314 242 237 76 76 48-150 2 30 2-Chlorotoluene ug/kg ND 63.3 62.8 65.7 64.1 104 102 66-139 2 30 4-Chlorotoluene ug/kg ND 63.3 62.8 66.1 64.7 104 103 64-138 2 30 4-Methyl-2-pentanone (MIBK) ug/kg ND 316 314 313 309 99 98 57-150 1 30 Acetone ug/kg ND 316 314 325 355 103 113 48-142 9 30 Allyl chloride ug/kg ND 63.3 62.8 54.2 51.2 86 81 52-146 6 30 Benzene ug/kg ND 63.3 62.8 53.0 51.0 84 81 62-133 4 30 Bromobenzene ug/kg ND 63.3 62.8 65.1 64.3 103 102 66-141 1 30 Bromochloromethane ug/kg ND 63.3 62.8 54.1 50.7 85 81 70-131 7 30

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 38 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 38 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 1412415 1412416 MS MSD 10225009001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Bromodichloromethane ug/kg ND 63.3 62.8 64.7 61.9 102 99 70-138 4 30 Bromoform ug/kg ND 63.3 62.8 64.2 63.7 101 101 60-156 .7 30 Bromomethane ug/kg ND 63.3 62.8 51.4 52.2 81 83 39-150 2 30 Carbon tetrachloride ug/kg ND 63.3 62.8 57.7 55.6 91 89 68-140 4 30 Chlorobenzene ug/kg ND 63.3 62.8 65.1 63.6 103 101 69-134 2 30 Chloroethane ug/kg ND 63.3 62.8 59.3 66.3 94 106 67-134 11 30 Chloroform ug/kg ND 63.3 62.8 55.8 53.5 88 85 68-133 4 30 Chloromethane ug/kg ND 63.3 62.8 54.6 57.0 86 91 56-128 4 30 cis-1,2-Dichloroethene ug/kg ND 63.3 62.8 54.4 53.1 86 85 66-133 2 30 cis-1,3-Dichloropropene ug/kg ND 63.3 62.8 63.1 60.9 100 97 66-132 4 30 Dibromochloromethane ug/kg ND 63.3 62.8 64.9 64.4 102 103 75-137 .7 30 Dibromomethane ug/kg ND 63.3 62.8 60.6 57.7 96 92 67-145 5 30 Dichlorodifluoromethane ug/kg ND 63.3 62.8 107 122 170 194 30-150 13 30 M1 Dichlorofluoromethane ug/kg ND 63.3 62.8 55.7 58.9 88 94 60-150 6 30 Diethyl ether (Ethyl ether) ug/kg ND 63.3 62.8 52.9 52.2 84 83 62-136 1 30 Ethylbenzene ug/kg ND 63.3 62.8 64.1 62.9 101 100 70-134 2 30 Hexachloro-1,3-butadiene ug/kg ND 63.3 62.8 72.9 72.0 115 115 30-150 1 30 Isopropylbenzene (Cumene) ug/kg ND 63.3 62.8 67.3 65.6 106 105 64-139 2 30 Methyl-tert-butyl ether ug/kg ND 63.3 62.8 53.9 51.2 85 81 64-137 5 30 Methylene Chloride ug/kg ND 63.3 62.8 52.0 49.4 79 76 62-132 5 30 n-Butylbenzene ug/kg ND 63.3 62.8 70.1 69.1 111 110 41-150 1 30 n-Propylbenzene ug/kg ND 63.3 62.8 66.5 67.0 105 107 64-141 .8 30 Naphthalene ug/kg ND 63.3 62.8 60.4 59.9 95 95 50-150 .8 30 p-Isopropyltoluene ug/kg ND 63.3 62.8 67.9 68.0 107 108 52-150 .1 30 sec-Butylbenzene ug/kg ND 63.3 62.8 69.1 68.1 109 109 55-149 1 30 Styrene ug/kg ND 63.3 62.8 64.0 63.8 101 102 53-144 .2 30 tert-Butylbenzene ug/kg ND 63.3 62.8 69.3 67.2 110 107 64-141 3 30 Tetrachloroethene ug/kg ND 63.3 62.8 67.0 66.5 106 106 70-136 .7 30 Tetrahydrofuran ug/kg ND 633 628 675 704 107 112 50-146 4 30 Toluene ug/kg ND 63.3 62.8 63.6 63.3 100 101 68-134 .5 30 trans-1,2-Dichloroethene ug/kg ND 63.3 62.8 52.4 50.3 83 80 64-135 4 30 trans-1,3-Dichloropropene ug/kg ND 63.3 62.8 63.2 63.3 100 101 67-139 .1 30 Trichloroethene ug/kg ND 63.3 62.8 80.1 75.6 119 112 68-138 6 30 Trichlorofluoromethane ug/kg ND 63.3 62.8 65.3 72.2 103 115 67-148 10 30 Vinyl chloride ug/kg ND 63.3 62.8 58.3 62.8 92 100 62-132 7 30 Xylene (Total) ug/kg ND 189 188 189 185 100 98 71-137 2 30 1,2-Dichloroethane-d4 (S) % 83 83 30-150 4-Bromofluorobenzene (S) % 99 100 30-150 Toluene-d8 (S) % 99 101 30-150

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 39 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 39 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

QC Batch: MSV/23438 Analysis Method: EPA 8260 QC Batch Method: EPA 5035/5030B Analysis Description: 8260 MSV 5030 Med Level Associated Lab Samples: 10225201011

METHOD BLANK: 1413839 Matrix: Solid Associated Lab Samples: 10225201011 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Benzene ug/kg ND 20.0 04/22/13 16:52 Ethylbenzene ug/kg ND 50.0 04/22/13 16:52 Toluene ug/kg ND 50.0 04/22/13 16:52 Xylene (Total) ug/kg ND 150 04/22/13 16:52 1,2-Dichloroethane-d4 (S) % 96 57-150 04/22/13 16:52 4-Bromofluorobenzene (S) % 96 67-138 04/22/13 16:52 Toluene-d8 (S) % 93 70-136 04/22/13 16:52

LABORATORY CONTROL SAMPLE & LCSD: 1413840 1413841 Spike LCS LCSD LCS LCSD % Rec Max Parameter Units Conc. Result Result % Rec % Rec Limits RPD RPD Qualifiers Benzene ug/kg 1000 970 849 97 85 72-125 13 20 Ethylbenzene ug/kg 1000 984 848 98 85 75-125 15 20 Toluene ug/kg 1000 990 852 99 85 75-125 15 20 Xylene (Total) ug/kg 3000 3030 2600 101 87 75-125 15 20 1,2-Dichloroethane-d4 (S) % 95 94 57-150 4-Bromofluorobenzene (S) % 96 94 67-138 Toluene-d8 (S) % 95 93 70-136

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 40 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 40 of 46 #=QC#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA

Project: WA-06008 Pace Project No.: 10225201

QC Batch: OEXT/21375 Analysis Method: NWTPH-Dx QC Batch Method: EPA 3546 Analysis Description: NWTPH-Dx GCS Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010

METHOD BLANK: 1409706 Matrix: Solid Associated Lab Samples: 10225201001, 10225201002, 10225201003, 10225201004, 10225201005, 10225201006, 10225201007, 10225201008, 10225201009, 10225201010 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Diesel Fuel Range mg/kg ND 15.0 04/17/13 03:54 Motor Oil Range mg/kg ND 20.0 04/17/13 03:54 n-Pentacosane (S) % 132 50-150 04/17/13 03:54

LABORATORY CONTROL SAMPLE: 1409707 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Diesel Fuel Range mg/kg 133 129 97 50-150 n-Pentacosane (S) % 126 50-150

MATRIX SPIKE & MATRIX SPIKE DUPLICATE: 1409708 1409709 MS MSD 10225179004 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Diesel Fuel Range mg/kg 112 328 330 422 367 94 77 50-150 14 30 Motor Oil Range mg/kg 639 725 478 41 30 n-Pentacosane (S) % 418 300 50-150 S5

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 41 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 41 of 46 #=QL#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALIFIERS

Project: WA-06008 Pace Project No.: 10225201

DEFINITIONS

DF - Dilution Factor, if reported, represents the factor applied to the reported data due to changes in sample preparation, dilution of the sample aliquot, or moisture content. ND - Not Detected at or above adjusted reporting limit. J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL - Adjusted Method Detection Limit. PRL - Pace Reporting Limit. RL - Reporting Limit. S - Surrogate 1,2-Diphenylhydrazine (8270 listed analyte) decomposes to Azobenzene. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean-Up U - Indicates the compound was analyzed for, but not detected. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute.

SAMPLE QUALIFIERS Sample: 10225201011 [1] The trip blank data has been evaluated down to the MDL and no j-flagged hits were present.

ANALYTE QUALIFIERS D3 Sample was diluted due to the presence of high levels of non-target analytes or other matrix interference. M1 Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. S5 Surrogate recovery outside control limits due to matrix interferences (not confirmed by re-analysis).

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 42 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 42 of 46 #=CR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA CROSS REFERENCE TABLE

Project: WA-06008 Pace Project No.: 10225201

Analytical Lab ID Sample ID QC Batch Method QC Batch Analytical Method Batch

10225201001 SB-4-4.5-5.0 EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137 10225201002 SB-4-29.5-30 EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137 10225201003 SB-4-40-41 EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137 10225201004 MW-3-5-5.5 EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137 10225201005 MW-3-32-33 EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137 10225201006 SB-5-6.5-7 EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137 10225201007 SB-5-9-10 EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137 10225201008 MW-2-5.5-6 EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137 10225201009 MW-2-30-31 EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137 10225201010 BD EPA 3546 OEXT/21375 NWTPH-Dx GCSV/11137

10225201001 SB-4-4.5-5.0 NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586 10225201002 SB-4-29.5-30 NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586 10225201003 SB-4-40-41 NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586 10225201004 MW-3-5-5.5 NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586 10225201005 MW-3-32-33 NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586 10225201006 SB-5-6.5-7 NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586 10225201007 SB-5-9-10 NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586 10225201008 MW-2-5.5-6 NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586 10225201009 MW-2-30-31 NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586 10225201010 BD NWTPH-Gx/8021 GCV/10585 NWTPH-Gx/8021 GCV/10586

10225201001 SB-4-4.5-5.0 EPA 3050 MPRP/38520 EPA 6010 ICP/16151 10225201002 SB-4-29.5-30 EPA 3050 MPRP/38520 EPA 6010 ICP/16151 10225201003 SB-4-40-41 EPA 3050 MPRP/38520 EPA 6010 ICP/16151 10225201004 MW-3-5-5.5 EPA 3050 MPRP/38520 EPA 6010 ICP/16151 10225201005 MW-3-32-33 EPA 3050 MPRP/38520 EPA 6010 ICP/16151 10225201006 SB-5-6.5-7 EPA 3050 MPRP/38520 EPA 6010 ICP/16151 10225201007 SB-5-9-10 EPA 3050 MPRP/38520 EPA 6010 ICP/16151 10225201008 MW-2-5.5-6 EPA 3050 MPRP/38520 EPA 6010 ICP/16151 10225201009 MW-2-30-31 EPA 3050 MPRP/38520 EPA 6010 ICP/16151 10225201010 BD EPA 3050 MPRP/38520 EPA 6010 ICP/16151

10225201001 SB-4-4.5-5.0 ASTM D2974 MPRP/38530 10225201002 SB-4-29.5-30 ASTM D2974 MPRP/38530 10225201003 SB-4-40-41 ASTM D2974 MPRP/38530 10225201004 MW-3-5-5.5 ASTM D2974 MPRP/38530 10225201005 MW-3-32-33 ASTM D2974 MPRP/38530 10225201006 SB-5-6.5-7 ASTM D2974 MPRP/38530 10225201007 SB-5-9-10 ASTM D2974 MPRP/38530 10225201008 MW-2-5.5-6 ASTM D2974 MPRP/38530 10225201009 MW-2-30-31 ASTM D2974 MPRP/38530 10225201010 BD ASTM D2974 MPRP/38530

10225201001 SB-4-4.5-5.0 EPA 5035A MSV/23355 EPA 8260 MSV/23411 10225201002 SB-4-29.5-30 EPA 5035A MSV/23355 EPA 8260 MSV/23411 10225201003 SB-4-40-41 EPA 5035A MSV/23355 EPA 8260 MSV/23411 10225201004 MW-3-5-5.5 EPA 5035A MSV/23355 EPA 8260 MSV/23411 10225201005 MW-3-32-33 EPA 5035A MSV/23355 EPA 8260 MSV/23411 10225201006 SB-5-6.5-7 EPA 5035A MSV/23355 EPA 8260 MSV/23411 10225201007 SB-5-9-10 EPA 5035A MSV/23355 EPA 8260 MSV/23411

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 43 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 43 of 46 #=CR#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

QUALITY CONTROL DATA CROSS REFERENCE TABLE

Project: WA-06008 Pace Project No.: 10225201

Analytical Lab ID Sample ID QC Batch Method QC Batch Analytical Method Batch

10225201008 MW-2-5.5-6 EPA 5035A MSV/23355 EPA 8260 MSV/23411 10225201009 MW-2-30-31 EPA 5035A MSV/23355 EPA 8260 MSV/23411 10225201010 BD EPA 5035A MSV/23355 EPA 8260 MSV/23411

10225201011 Trip Blank EPA 5035/5030B MSV/23438 EPA 8260 MSV/23439

Date: 04/24/2013 04:04 PM REPORT OF LABORATORY ANALYSIS Page 44 of 44 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225201 44 of 46 10225201 45 of 46 10225201 46 of 46 #=CL#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

LIMS USE: FR - ALEX LOPEZ LIMS OBJECT ID: 10225894 April 26, 2013

Alex Lopez Arcadis 111 SW Columbia St. Ste. 725 Portland, OR 97201

RE: Project: WA-6008 Pace Project No.: 10225894

Dear Alex Lopez: Enclosed are the analytical results for sample(s) received by the laboratory on April 19, 2013. The results relate only to the samples included in this report. Results reported herein conform to the most current TNI standards and the laboratory's Quality Assurance Manual, where applicable, unless otherwise noted in the body of the report.

If you have any questions concerning this report, please feel free to contact me.

Sincerely,

Mariah Peronto

[email protected] Project Manager

Enclosures

cc: Timothy Bellis, Arcadis OR Jonathan Flomerfelt, Arcadis U.S., Inc. Brian Marcum, Arcadis OR Lynne Stewart, Arcadis OR

REPORT OF LABORATORY ANALYSIS Page 1 of 38 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225894 1 of 40 #=CP#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

CERTIFICATIONS

Project: WA-6008 Pace Project No.: 10225894

Minnesota Certification IDs 1700 Elm Street SE Suite 200, Minneapolis, MN 55414 Montana Certification #: MT CERT0092 A2LA Certification #: 2926.01 Nevada Certification #: MN_00064 Alaska Certification #: UST-078 Nebraska Certification #: Pace Alaska Certification #MN00064 New Jersey Certification #: MN-002 Arizona Certification #: AZ-0014 New York Certification #: 11647 Arkansas Certification #: 88-0680 North Carolina Certification #: 530 California Certification #: 01155CA North Dakota Certification #: R-036 Colorado Certification #Pace North Dakota Certification #: R-036A Connecticut Certification #: PH-0256 Ohio VAP Certification #: CL101 EPA Region 8 Certification #: Pace Oklahoma Certification #: 9507 Florida/NELAP Certification #: E87605 Oregon Certification #: MN200001 Georgia Certification #: 959 Oregon Certification #: MN300001 Hawaii Certification #Pace Pennsylvania Certification #: 68-00563 Idaho Certification #: MN00064 Puerto Rico Certification Illinois Certification #: 200011 Tennessee Certification #: 02818 Kansas Certification #: E-10167 Texas Certification #: T104704192 Louisiana Certification #: 03086 Utah Certification #: MN00064 Louisiana Certification #: LA080009 Virginia/DCLS Certification #: 002521 Maine Certification #: 2007029 Virginia/VELAP Certification #: 460163 Maryland Certification #: 322 Washington Certification #: C754 Michigan DEQ Certification #: 9909 West Virginia Certification #: 382 Minnesota Certification #: 027-053-137 Wisconsin Certification #: 999407970 Mississippi Certification #: Pace

REPORT OF LABORATORY ANALYSIS Page 2 of 38 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225894 2 of 40 #=SS#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

SAMPLE SUMMARY

Project: WA-6008 Pace Project No.: 10225894

Lab ID Sample ID Matrix Date Collected Date Received

10225894001 MW-1 Water 04/17/13 17:00 04/19/13 09:45 10225894002 MW-2 Water 04/17/13 14:30 04/19/13 09:45 10225894003 MW-3 Water 04/17/13 12:30 04/19/13 09:45 10225894004 Equipment Blank Water 04/17/13 10:45 04/19/13 09:45 10225894005 BD-1 Water 04/17/13 00:00 04/19/13 09:45 10225894006 Trip Blank Water 04/17/13 00:00 04/19/13 09:45

REPORT OF LABORATORY ANALYSIS Page 3 of 38 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225894 3 of 40 #=SA#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

SAMPLE ANALYTE COUNT

Project: WA-6008 Pace Project No.: 10225894

Analytes Lab ID Sample ID Method Analysts Reported

10225894001 MW-1 NWTPH-Dx MT 3 NWTPH-Dx MT 4 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 EPA 6010 IP 1 EPA 8260 EB2 70 10225894002 MW-2 NWTPH-Dx MT 3 NWTPH-Dx MT 4 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 EPA 6010 IP 1 EPA 8260 EB2 70 10225894003 MW-3 NWTPH-Dx MT 3 NWTPH-Dx MT 4 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 EPA 6010 IP 1 EPA 8260 EB2 70 10225894004 Equipment Blank NWTPH-Gx/8021 KT1 2 EPA 8260 EB2 70 10225894005 BD-1 NWTPH-Dx MT 3 NWTPH-Dx MT 4 NWTPH-Gx/8021 KT1 2 EPA 6010 IP 1 EPA 6010 IP 1 EPA 8260 EB2 70 10225894006 Trip Blank EPA 8260 EB2 7

REPORT OF LABORATORY ANALYSIS Page 4 of 38 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225894 4 of 40 #=NA#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

PROJECT NARRATIVE

Project: WA-6008 Pace Project No.: 10225894

Method: NWTPH-Dx Description: NWTPH-Dx GCS Client: Arcadis OR Date: April 26, 2013

General Information: 4 samples were analyzed for NWTPH-Dx. All samples were received in acceptable condition with any exceptions noted below.

Hold Time: The samples were analyzed within the method required hold times with any exceptions noted below.

Sample Preparation: The samples were prepared in accordance with EPA 3510 with any exceptions noted below.

Initial Calibrations (including MS Tune as applicable): All criteria were within method requirements with any exceptions noted below.

Continuing Calibration: All criteria were within method requirements with any exceptions noted below.

Surrogates: All surrogates were within QC limits with any exceptions noted below.

Method Blank: All analytes were below the report limit in the method blank with any exceptions noted below.

Laboratory Control Spike: All laboratory control spike compounds were within QC limits with any exceptions noted below.

Matrix Spikes: All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below.

Additional Comments:

REPORT OF LABORATORY ANALYSIS Page 5 of 38 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc..

10225894 5 of 40 #=NA#

Pace Analytical Services, Inc. 1700 Elm Street - Suite 200 Minneapolis, MN 55414 (612)607-1700

PROJECT NARRATIVE

Project: WA-6008 Pace Project No.: 10225894

Method: NWTPH-Dx Description: NWTPH-Dx GCS Silica Gel LV Client: Arcadis OR Date: April 26, 2013