HTHSoilsInvestigationMemo (Informational Only).pdf

983 University Avenue, Building D Los Gatos, CA 95032 Ph: 408.458.3200 F: 408.458.3210

Memorandum

May 3, 2017

To: Dawn Edwards, M.S.

Environmental Project Manager HDR Engineering, Inc.

From: Max Busnardo, M.S.

Principal, Restoration Ecologist

Cc: Daniel Jabbour, PE (HDR Engineering); Justin Hanzel-Durbin, EIT (Senior Engineer, TRC Solutions); Joe Howard M.L.A. (H.T. Harvey & Associates); Doug Roaldson (U.S.

Department of Veterans Affairs)

Subject: Alameda Point Veterans Affairs Project - Onsite Wetland Mitigation -

Investigation to Determine Ecological Suitability of Onsite Soils

Introduction

The U.S. Department of Veteran’s Affairs (VA) Multi-specialty Outpatient Clinic and Columbarium project (project) will result in impacts to 7.2 acres of jurisdictional wetlands on the former Naval Air Base at Alameda Point over the next several decades. H. T. Harvey & Associates, in collaboration with HDR, developed a preliminary/conceptual onsite wetland mitigation package, which includes the creation of 7.2 acres of new tidal salt marsh (wetland mitigation site) and the enhancement of 13.2 acres of existing salt marsh/salina (wetland enhancement site) (H. T. Harvey & Associates 2016a). The VA then held an interagency meeting in fall 2016 to obtain input on the mitigation package. Per agency input at the meeting, the target habitat at the wetland mitigation site will be primarily tidal salt marsh with a few, small salinas within the marsh plain. Construction of the 7.2 acre wetland mitigation site will entail excavation to design grades suitable for establishment of tidal salt marsh hydrology. The project will require a federal Clean Water Act Section 401 permit from the San Francisco Bay Regional Water Quality Control Board (RWQCB). To protect aquatic life, the RWQCB typically requires that surface soils in constructed wetlands meet the ecological contaminant screening criteria for “wetland surface material” in Table 4 of the Beneficial Reuse of Dredged Materials: Sediment Screening and Testing Guidelines (RWQCB 2000). Moreover, surface soils at the wetland mitigation site need to be horticulturally suitable for establishment of tidal salt marsh vegetation to meet the mitigation design goals.

H. T. HARVEY & ASSOCIATES

In accordance with H. T. Harvey & Associates scope of work, we have completed a soils investigation to determine the ecological suitability of soils at the wetland mitigation site. This Technical Memorandum provides H. T. Harvey & Associates methods and results to both satisfy the RWQCB’s contaminant screening guidelines and assess the horticultural suitability of surface soils to be daylighted at the design grade within the wetland mitigation site. Below we also provide design recommendations to help inform the HDR team’s mitigation design in the project’s forthcoming Mitigation and Monitoring Plan (MMP) and construction documentation package.

Methods for Soil Sampling and Analysis

Overview

We identified a 10.9 acre wetland mitigation study area (study area) on Alameda Point wherein the 7.2 acre mitigation wetland will be constructed (Figure 1). The study area is intentionally larger than the mitigation acreage requirement to allow flexibility during the forthcoming design process to determine the precise location of the mitigation wetland. We developed this soil sampling and analysis plan to characterize the presence (or absence), concentration, and distribution of contaminants of concern and to determine the horticultural suitability of soils both above (the overburden) and at/below the mitigation wetland design grade within the study area. Our overburden sampling provides data to determine the extent of suitable above-grade soils that may be used to replace unsuitable soils at and below the design grade, if needed.

Sampling Intensity and Sample Locations

Our sample plan called for collection of 24 samples: 12 samples each comprised of 2 composited subsamples to characterize the overburden, and 12 samples each comprised of 2 composited subsamples to characterize the wetland surface material collected (48 total subsamples). Samples were collected at the 12 sampling locations shown in Figure 1. Although the State Department of Toxic Substance Control (DTSC) has no regulatory involvement in this project, our sampling intensity is consistent with DTSC’s guidance. Our sampling intensity exceeds DTSC’s minimum Borrow Area sample guidelines, which specify a minimum of 8 sampling locations with 4 subsamples per location for borrow areas larger than 10 acres (DTSC 2001), and is appropriate based on the homogenous nature of soils within the study area, which are composed of uniform, sandy dredge material excavated from the San Francisco Bay and laid down decades ago to form the Alameda Point Naval Air Station.

Our prior soil sampling for horticultural properties at the potential mitigation site indicated relatively homogeneous, unstratified sandy soils within and adjacent to the current study area (H. T. Harvey & Associates 2016b). Our sampling results confirmed that soils are consistently sandy and unstratified across the study area.

SP 7

SP 4

SP 11

SP 9

SP 12

SP 6

SP 5

SP 2

SP 1

SP 10

SP 3

SP 8

260 0 260130 Feet

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-03 \M isc \Fi g 1 So il S am pli ng

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Figure 1. Soil Sampling Locations Alameda Point Veterans Affairs Project

Onsite Wetland MItigation - Soils Investigation (3898-03) May 2017

Legend Soil Sampling Locations 100-ft Buffer Radius Wetland Mitigation Study Area (10.9 ac) Potential Berm Footprint (1.7 ac)

Wetland Delineation (2012) Salt Marsh (7.4 ac) Seasonal Wetland (4.7 ac) Unvegetated Water (5.9 ac)

We determined sampling depths based on the basis of design for the mitigation wetland grading/excavation, to ensure that samples characterized the wetland surface material to be daylighted as well as the material above the wetland surface (referred to herein as the “overburden”) that could be potentially salvaged for reuse at the design grade, if needed, to replace unsuitable material. Figure 2 provides an example of the sampling design as a function of depth in the soil profile. The mitigation wetland design grade will consist of elevations between 6.4 and 3.2 ft North American Vertical Datum 1988 (NAVD88). This is because the large majority of the restored tidal marsh plain habitat will be situated at elevations from Mean Higher High Water (MHHW; 6.4 ft NAVD88) to Mean High Water (MHW; 5.8 ft NAVD88). A few small salinas on the marsh plain will be situated approximately 1.5 ft (on average) below MHHW (4.9 ft NAVD88). The design grade of most tidal channels cut into the marsh plain will be situated at or above mean sea level (3.2 ft NAVD88). The 1.5 ft depth defining wetland surface material is a conservative estimate because the majority of tidal marsh plant roots and invertebrates occur in the upper 6 inches of sediment in tidal marshes. For this reason, sampling for contaminants to characterize wetland surface material to a depth of 1.5 ft has been approved by RWQCB on several wetland mitigation sites (e.g., the Santa Clara Valley Transportation Authority Tasman Corridor Wetland Mitigation, City of Santa Clara Ulistac Natural Area Wetland Mitigation, and CALTRANS Foster City Mitigation Wetland). Hence, the upper 1.5 ft of soil in the wetland must meet the RWQCB’s environmental screening criteria for wetland surface material. Therefore, the vertical range of wetland design grade soil sampling was from 6.4 ft NAVD88 (MHHW) to 1.7 ft NAVD88 (1.5 ft below the depth of most tidal channels, the lowest elevation wetland design feature). The overburden that we sampled constituted the vertical range of soil above MHHW.

Each of the twelve soil sampling pits represents an area of approximately 0.7 to 0.9 acre (Figure 1). Within each pit, four subsamples, distributed vertically, were collected for contaminant screening (Figure 2). The two upper subsamples were collected within the vertical range of the overburden. The two lower samples were collected within the vertical range of potential wetland surface material. The four subsamples from each pit were stored in individual containers and later composited by the laboratory into a single overburden composite sample and a single wetland surface material composite sample for analysis as shown in Figure 2. In this way, a total of 12 overburden samples and 12 wetland surface material samples were analyzed for contaminants. Table 1 provides the depths of samples relative to the surface elevation for each sampling pit. Prior to sampling, we recorded sampling locations with a sub-meter GPS and contracted Subtronic Corporation to provide onsite utility detection within the excavation footprints of those locations.

Table 1. Surface Elevations and Sampling Depths by Location Soil

Sampling Location

Ground Surface Elevation 1

(Feet NAVD 88)

Overburden Sampling Range 2 (Feet below ground surface)

Wetland Design Elevation Sampling Range 3 (Feet below ground surface)

1 10.2 0.3 - 3.8 3.8 - 8.5

2 9.8 0.3 - 3.4 3.4 - 8.1

3 10.6 0.3 - 4.2 4.2 - 8.9

4 10.6 0.3 - 4.2 4.2 - 8.9

5 10.1 0.3 - 3.7 3.7 - 8.4

6 11.2 0.3 - 4.8 4.8 - 9.5

7 9.0 0.3 - 2.6 2.6 - 7.3

8 9.9 0.3 - 3.5 3.5 – 8.2

9 9.7 0.3 - 3.3 3.3 – 8.0

10 10.3 0.3 - 3.9 3.9 - 8.6

11 9.2 0.3 - 2.8 2.8 - 7.5

12 9.2 0.3 - 2.8 2.8 - 7.5

1. Ground surface elevations derived from Northern San Francisco Bay Area LiDAR (NOAA, 2020).

2. The overburden sampling range is defined as all sediment above 6.4 ft elevation (NAVD 88) minus any unsuitable surface material.

3. The Wetland design elevation sampling range is defined as 3.4 – 6.4 ft elevation (NAVD 88).

Ecological Consultants

Figure 2. Example of Soil Sampling Profile

(at Soil Sampling Location 1) Alameda Point Veterans Affairs Project

Onsite Wetland Mitigation - Soils Investigation (3898-03) May 2017

0.3

3.8

7.0

8.5

0.0

Surface material (e.g., asphalt, baserock or vegetation)

Overburden material

Depth below ground surface

(feet)

Elevation (feet NAVD88)

10.2

9.9 (estimated)

6.4

(MHHW)

3.2

(MSL)

1.7

Range of typical wetland design grades Wetland surface material

Overburden material grab samples to be composited

Highest tidal marsh plain elevation (Upper extent of typical wetland design grade)

Wetland surface material grab samples to be composited

Typical tidal channel bottom elevation (Lower extent of typical wetland design grade)

1.5 feet

~ NOT TO SCALE ~

(estimated)

Soil Contaminant Screening

We directed BC Laboratories, Inc. (Bakersfield, CA) to test soil samples for the contaminants listed in the Recommended Sediment Chemistry Screening Guidelines for Beneficial Reuse of Dredged Material for “Wetland Surface Material” as described in Table 4 of RWQCB 2000. In addition, based on the history of site use as a naval air station, we elected to test for individual Petroleum Hydrocarbons. Therefore, contaminants that were tested include Organochlorine Pesticides (EPA-8081A), polychlorinated biphenyls (PCBs) (EPA 8082), polycyclic aromatic hydrocarbons (PAHs) (EPA 8270C-SIM), Fuels (EPA-8015B and EPA-8015B/FFP); the summation of which we report as Total Recoverable Petroleum Hydrocarbons (TRPH), Mercury (EPA-7471A), and other metals (EPA-6020). The complete list of contaminant tests and constituents relative to the RWQCB screening criteria is provided in Attachment A. The complete lab report is provided in Attachment B.

Soil Horticultural Analysis

We also collected 48 sub-samples for horticultural analysis. These samples were collected from the same geographic and vertical locations as for contaminant screening. Following assessment of contaminant sampling results, these subsamples were composited into 6 samples that best characterize the extent of material that may potentially comprise the wetland surface material. We submitted the 6 horticultural composite samples to Waypoint Analytical (Anaheim, CA) for analysis to characterize their horticultural properties. Horticultural analyses include USDA texture (ASTM D422 method). Various wet chemical methods (SSSA Methods of Soil Analysis Chemical Methods – or equivalent) will also be utilized to quantify pertinent horticultural parameters such as salinity, pH, and Boron concentration, as well as macro- and micro-nutrient concentrations. We have utilized these results to determine the horticultural suitability of soils and to make our recommendations.

Collection of Soil Samples

H.T. Harvey & Associates collected soil samples on March 28-29, 2017. Soil sampling for contaminant analysis followed the U.S. EPA Environmental Response Team Standard Operating Procedures - Soil Sampling (USEPA 2000) for sampling via trench excavation. At each soil sampling location, a soil sample pit was excavated using an excavator with a 3 foot digging bucket to remove any overlying debris and/or vegetation and expose the upper limit of the overburden sampling range. The excavator bucket was then withdrawn from the pit and excess sediment from the bucket was removed with a brush. The operator then excavated downward through the soil profile and a soil sample was collected directly from the first bucket load to be drawn from each progressively deeper sampling depth. Exposed material was scraped from each bucket volume to be sampled in order to obtain a sample from the central region of the bucket volume and avoid contamination via contact with the bucket itself. H. T. Harvey & Associates restoration ecologist, Matt Pollock, collected all soil samples. He wore a new, clean pair of nitrile gloves and used a new, sterile sampling scoop for each individual subsample collected. Soil samples were packed into 1-quart glass sampling containers (for contaminant screening), as well as a 1-gallon Ziploc bag (for horticultural analysis). New glass sampling containers were provided by BC Laboratories Inc. for this purpose.

Each sampling container and bag was sealed and labelled with a unique sample ID, time, and date. Filled glass containers were placed in a cooler containing ice. The incremental depth of excavation was measured by extending a steel measuring tape into the pit and measuring against the ground surface. Sample pits were backfilled immediately after sample collection. Where pits occurred on tarmac, broken asphalt and gravel, removed from the surface of the pit, was placed back on top of the pit and compacted to restore a firm, flat surface.

Storage and Delivery Protocols

Contaminant Screening. At the end of each of the two sampling days, sample coolers were transported to H.

T. Harvey & Associate’s office in Los Gatos, CA, repacked with fresh ice, and stored in a secure area. Chain-of-custody (CoC) documentation was completed at the end of each day. A representative of BC Laboratories Inc.

collected the samples from our office on the morning of March 30, 2017. This timeline ensured that samples were processed within the required holding time (7 days).

Horticultural Analysis. Contaminant screening results were used to inform the soil horticultural analysis. We composited six samples from the 48 subsamples to characterize soil volumes from areas that met the RWQCB’s contaminant screening criteria. We determined that 6 samples were sufficient to adequately characterize horticultural suitability given the homogenous nature of the soils encountered during excavation at the wetland design grade. For each composite, equal volumes of applicable subsamples were mixed together and sent to Waypoint Analytical (Anaheim, CA). Samples for horticultural analysis were composited from the sample locations in Figure 1 as follows:

• Northern Overburden - overburden samples from locations 1, 2, 3 and 4.

• Northern Wetland – wetland design grade samples from locations 1, 2, 3 and 4.

• Central Overburden - overburden samples from locations 5, 6, 7, and 8.

• Central Wetland - wetland design grade samples from locations 5, 6, 7 and 8.

• Southern Overburden – overburden samples from location 10, 11 and 12.

• Southern Wetland - wetland design grade samples from locations 9 and 12.

Results

Contaminant Screening

A summary table with contaminant screening results is provided in Attachment A. Attachment B provides the complete laboratory report. The contaminant screening results indicate that all soil volumes tested within the study area are suitable for use as wetland surface soils within 1.5 feet of, or at the wetland design grade, with the following exception:

• Cadmium was detected in concentrations higher than the RWQCB 2000 screening criterion of 0.33 mg/kg in 3 of the 24 composite samples. Cadmium concentrations were 0.38 mg/kg in the overburden soil at sample location 9 and 0.45 and 0.41 mg/kg in the wetland design-grade soil at sample locations 10 and 11, respectively.

The Reporting Limits (RL) were lower than the screening criteria for all contaminants, with the exception of chlordanes (sum), hexachlorocyclohexane (sum), and hexachlorobenzene, however, the Method Detection Limit (MDL) for these constituents was lower than the screening criteria. These contaminants were “not detected” (ND) at the MDL. Therefore, the concentrations for chlordanes (sum), hexachlorocyclohexane (sum), and hexachlorobenzene are below the screening criteria in all samples based on the MDL.

Horticultural Analysis

Soil horticultural analysis results are provided in Attachment C. All site soils are acceptable for use as wetland soils with the additional of soil amendments. Our horticultural analysis demonstrates that site soils are relatively homogeneous. All six composite samples were classified as sand with pH ranging between 7.1 and 8.0, a range suitable for tidal marsh plant growth. Boron, which can be toxic to plants when elevated, was below 0.20 parts per million (ppm) and below the level toxic to plants. Macro and micronutrient levels were sufficient for tidal marsh plant growth.

Soil texture was a homogenous sand (medium to very fine) across all samples. The amount of organic matter present was low in all samples, ranging from 0.6 to 0.4% organic matter (dry weight basis). By contrast, tidal marshes typically have organic matter ranging from 5-30% dry weight and typically occur in fine textured clay to silt sediments. A study of 6 naturally occurring pickleweed (Spartina spp.) marshes in southern California found organic matter ranging from 3-45% (Talley and Levin 1999). Low organic matter and coarse soil texture can lead to poor productivity in tidal marshes.

Wetland Mitigation Grading/Soil Preparation Recommendations

We provide the following grading and soil preparation recommendations for incorporation into the forthcoming Habitat Mitigation and Monitoring Plan and construction documentation:

• Surficial Materials. The grading plan should include the removal of surface hardscape (e.g., asphalt, underlying gravels) and the vegetation within the wetland mitigation and berm footprint.

• Removal of Soil Exceeding the RWQCB Screening Criteria and Replacement with Soils Meeting the Screening Criteria. Soils containing elevated concentrations of cadmium should be removed from within the wetland and berm design footprint. These soils should be replaced up to the design grade with overburden soils that meet the screening criteria. The exact spatial extent of the soil removal should be determined during the forthcoming wetland/berm design phase. Specifically:

o Soil above 6.4 ft NAVD88 within in the area represented by sample location 9 should be removed from the project site.

o Soil from 6.4 ft NAVD88 to 1.5 ft below the final wetland design grade in the area represented by sample locations 10 and 11 should be removed from the project site.

o Areas with elevated cadmium should be dewatered prior to soil removal to prevent contamination of adjacent, suitable areas o Grading of the wetland and berm areas should be done only after removal of contaminated soil from the project site.

o Wetland surface soils removed from sample locations 10 and 11 should be replaced up to the design grade with soils meeting the screening criteria from the remainder of the site.

• Tidal Marsh Design and Constructability. Tidal marshes and slough channels are typically composed of fine textured sediment (e.g., clays). Cohesions between clay particles allows for formation of steeply walled slough channels in naturally formed marshes. By contrast, sands typically have a relatively low angle of repose under saturated conditions. Therefore, given the sandy soil material in the mitigation wetland, the physical characteristics of site soils should be carefully considered in the design of tidal slough channels. Moreover, we found groundwater relatively close to the marsh plain design grade, which would likely create an unstable soil surface for heavy equipment operation. This should be taken into consideration in crafting the constructability aspects of the grading and dewatering plan.

• Soil Amendments. If feasible, an organic amendment should be thoroughly incorporated into the upper 6 inches of the constructed tidal marsh plain to increase organic matter content to between 5-30% dry weight.

Sediment sources with levels of organic matter below this range are likely to lead to lower cover and productivity of marsh plants. The feasibility, type and application rate of organic amendment will be determined during the forthcoming design phase.

References

[DTSC] California Department of Toxic Substance Control. 2001. Information Advisory: Clean Imported Fill Material. October. Sacramento, California.

H. T. Harvey & Associates, 2016a. Technical Memorandum from Max Busnardo (HTH) to Dawn Edwards (HDR). Subject: Alameda Point Veterans Administration Project-Conceptual Onsite Mitigation Package for Regulatory Agency Review. October 21, 2016.

H. T. Harvey & Associates, 2016b. Alameda Point Veterans Affairs Project: Wetland Mitigation Feasibility Study.

Prepared for Warren Yip, Veterans Affairs. Los Gatos, CA

[RWQCB] Regional Water Quality Control Board. 2000. Draft Staff Report. Beneficial Reuse of Dredged Materials: Sediment Screening and Testing Guidelines. Prepared by: San Francisco Bay Regional Water Quality Control Board staff. May 25, 2000.

Talley, T.S. and L.A. Levin. 1999. Macrofaunal succession and community structure in Salicornia marshes of southern California. Estuarine, Coastal Shelf Science. 49:713-731

[USEPA] U.S. Environmental Protection Agency Environmental Response Team. 2000. SOP #2012; Revision 0.0; 2/18/2000. Standard Operating Procedures – Soil Sampling.

Attachment A.

Summary Table of Contaminant Screening Results

Analyte

RWQCB Wetland Surface Material

Screening Criteria Units Reporting Limit (RL)

Method Detection Limit (MDL) Method

RL<

Criteria?

MDL<

Criteria? 1-O 1-W 2-O 2-W 3-O 3-W 4-O 4-W 5-O 5-W 6-O 6-W 7-O 7-W 8-O 8-W 9-O 9-W 10-O 10-W 11-O 11-W 12-O 12-W Comments

Metals Arsenic 15.3 mg/kg 0.58 0.20 EPA-6020 Yes Yes 1.3 1.3 1.5 1.3 1.3 1.3 1.2 1.7 1.6 1.9 1.6 2.4 1.8 1.6 1.8 1.4 2.8 1.2 2 3 1.5 3.1 1.3 1.8 Meets Criteria Cadmium 0.33 mg/kg 0.29 0.055 EPA-6020 Yes Yes 0.091 0.11 0.15 0.13 0.12 0.12 0.18 0.16 0.1 0.15 0.12 0.18 0.18 0.097 0.2 0.14 0.38 0.13 0.14 0.45 0.22 0.41 0.15 0.14 See note A Chromium 112 mg/kg 0.86 0.29 EPA-6020 Yes Yes 25 32 28 27 29 29 39 32 28 30 27 36 35 26 33 28 36 27 33 41 24 39 30 42 Meets Criteria Copper 68.1 mg/kg 0.58 0.11 EPA-6020 Yes Yes 4.7 5 5.2 5.4 5.3 4.8 9.4 5.4 5.1 6.8 4.8 8.2 8 5 6.8 5.8 14 5.5 6.2 13 5.5 12 6.2 6.2 Meets Criteria Lead 43.2 mg/kg 0.29 0.14 EPA-6020 Yes Yes 2 3.7 2.4 2.4 2.5 2.1 3.7 2.3 2.4 2.8 2.2 5.6 3.8 2 3.1 3.2 9 2.5 4.4 8 4.4 7.6 2.6 2.4 Meets Criteria Mercury 0.43 mg/kg 0.18 0.022 EPA-7471A Yes Yes ND ND ND 0.026 ND ND 0.045 ND ND 0.031 ND 0.035 ND ND ND ND 0.085 ND ND 0.081 ND 0.14 ND ND Meets Criteria Nickel 112 mg/kg 0.58 0.13 EPA-6020 Yes Yes 24 25 25 25 24 25 38 26 26 31 24 32 31 23 30 26 35 27 26 36 20 39 27 30 Meets Criteria Selenium 0.64 mg/kg 0.58 0.13 EPA-6020 Yes Yes ND ND 0.13 0.21 0.24 0.19 ND 0.39 0.32 ND ND ND 0.12 0.12 ND ND 0.12 0.17 ND ND ND ND ND ND Meets Criteria Silver 0.58 mg/kg 0.29 0.059 EPA-6020 Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 0.11 ND ND 0.15 0.12 0.13 ND ND Meets Criteria Zinc 158 mg/kg 1.5 0.58 EPA-6020 Yes Yes 15 16 16 17 17 19 27 16 16 21 15 26 23 15 19 18 41 18 20 37 19 37 19 20 Meets Criteria Organochlorine Pesticides/PCBs DDTs, sum 7.0 ug/kg 1.74 0.284 EPA-8081A Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria Chlordanes, sum1

2.3 ug/kg 58 1.7 EPA-8081A No Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria Dieldrin 0.72 ug/kg 0.58 0.081 EPA-8081A Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria Hexachlorocyclohexane, sum1

0.78 ug/kg 2.32 0.263 EPA-8081A No Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria Hexachlorobenzene 0.485 ug/kg 2.3 0.33 EPA-8081A No Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria PCBs, sum 22.7 ug/kg 12 5.8 EPA-8082 Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria Polycyclic Aromatic Hydrocarbons PAHs, total 3390 ug/kg 5.8 2.3 EPA-8270C-SIM Yes Yes 33 ND 33 35 43 31 79 18 66 56 11 110 99 23 220 340 92 56 43 70 55 220 48 19 Meets Criteria Low molecular weight PAHs, sum 434 ug/kg 5.8 2.3 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND 6.1 ND 14 ND ND 8.7 7.6 ND 8.7 13 6.3 4.4 3.8 5 ND 23 4.7 ND Meets Criteria High molecular weight PAHs, sum 3060 ug/kg 5.8 2.3 EPA-8270C-SIM Yes Yes 33 ND 33 35 43 31 73 18 52 56 11 110 91 23 210 320 86 51 39 65 55 200 43 19 Meets Criteria 1-Methylnaphthalene 12.1 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria 1-Methylphenanthrene 31.7 ug/kg 5.8 2.3 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria 2,3,5-Trimethylnaphthalene 9.8 ug/kg 5.8 2.3 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria 2,6-Dimethylnaphthalene 12.1 ug/kg 5.8 2.3 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria 2-Methylnaphthalene 19.4 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria 2-Methylphenanthrene NA ug/kg 5.8 2.3 EPA-8270C-SIM NA NA ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND See note B 3-Methylphenanthrene NA ug/kg 5.8 2.3 EPA-8270C-SIM NA NA ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND See note B Acenaphthene 26.0 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria Acenaphthylene 88.0 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND 4.1 ND ND ND ND ND ND ND ND ND ND ND ND 2.4 ND ND Meets Criteria Anthracene 88.0 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND 2.6 ND 9.2 ND ND 3.5 2.7 ND 2.9 3.9 3 2.8 2.3 2.9 ND 6 2.5 ND Meets Criteria Benz(a)anthracene 412 ug/kg 3.5 1.5 EPA-8270C-SIM Yes Yes 1.8 ND 1.9 2.3 2.4 2 4.9 ND 5.9 3.6 ND 7.4 4.9 ND 17 30 5.2 3.2 2.3 4.6 3.4 16 2.9 ND Meets Criteria Benzo(a)pyrene 371 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes 4.1 ND 3.9 4.2 4.9 4.3 7.6 ND 5.9 6.3 ND 10 10 2.8 23 35 9 6.8 5.7 8.3 7.2 22 5.8 4 Meets Criteria Benzo(e )pyrene 294 ug/kg 5.8 2.3 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria Benzo(b)flouranthene 371 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes 5.2 ND 5 4.9 6.1 5.1 10 4.2 10 7.5 4.2 13 10 3.9 32 51 11 7.6 6 9.6 8.8 25 6.5 4.4 Meets Criteria Benzo(g,h,i)perylene 310 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes 4.1 ND 4.3 4.2 5.3 4.3 7.6 3.8 4.4 6.3 ND 9.2 7.6 3.6 19 22 9.7 6.4 5.3 7.1 6.9 20 5.1 3.6 Meets Criteria Benzo(k)flouranthene 258 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes 2.2 ND 2.3 2.7 2.8 2 3.4 2.3 4.4 3.2 1.5 4.4 4.2 1.8 10 15 4.1 3.2 2.6 3.3 3 8 2.9 2.4 Meets Criteria Biphenyl 12.9 ug/kg 5.8 2.3 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria Chrysene 289 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes 1.5 ND 1.6 1.5 2.4 ND 4.9 ND 5.2 3.6 ND 6.1 6.1 ND 17 28 5.2 2 1.5 3.3 3 15 2.2 ND Meets Criteria Dibenz(a,h)anthracene 32.7 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND 4.4 5.5 ND ND ND ND ND ND ND ND Meets Criteria Flouranthene 514 ug/kg 3.5 1.3 EPA-8270C-SIM Yes Yes 4.8 2.1 4.3 4.6 5.3 3.6 11 3.4 3.7 6.7 2.7 16 14 3.2 25 43 11 5.2 3.4 7.1 5.7 27 5.1 ND Meets Criteria Flourene 25.3 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 3.2 ND ND Meets Criteria Indeno(1,2,3-c,d)pyrene 382 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes 3.7 ND 4.3 3.8 4.5 4 6.1 ND 4.4 5.1 ND 7.4 6.1 3.6 13 18 7.5 5.6 4.9 6.2 6.1 15 4.7 4.4 Meets Criteria Naphthalene 55.8 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Meets Criteria Perylene 145 ug/kg 5.8 2.3 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND ND ND ND ND ND 2.6 2.7 ND 5.8 8.2 ND ND ND ND ND 5.2 ND ND Meets Criteria Phenanthrene 237 ug/kg 3.5 1.2 EPA-8270C-SIM Yes Yes ND ND ND ND ND ND 3.4 ND ND ND ND 5.2 4.9 ND 5.4 8.6 3.4 1.6 1.5 2.1 ND 12 2.2 ND Meets Criteria Pyrene 665 ug/kg 3.5 1.8 EPA-8270C-SIM Yes Yes 5.9 ND 5.4 6.5 7.3 4.3 17 4.6 3.7 10 3.1 24 21 4.3 30 49 16 6.8 4.5 11 6.9 30 5.4 ND Meets Criteria Total Petroleum Hydrocarbons TPHs, sum1

NA mg/kg 304 99.8 EPA-8015B/FFP NA NA ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND See note B

Contaminant level exceeds the RWQCB screening criterion

ND: Analyte not detected at concentration equal to or greater than the MDL.

1 The RL & MDL reported for these sumations are the sums of the RLs and MDLs for the individual analytes

Note A: Samples 9-O, 10-W, and 11-W contain cadmium concentrations above the screening criterion

Note B: There are no screening criteria specified for these analytes

Summary Table of Contaminant Screening Results

Soil Sample Locations (See Figure 1). O=Overburden, W=Wetland design grade

Attachment B.

BC Laboratory Report- Contaminants Data

Laboratories, Inc.

Environmental Testing Laboratory Since 1949

Date of Report: 04/14/2017

Matt Pollock

H.T. Harvey & Associates

983 University Avenue, Building D

Los Gatos, CA 95032

Client Project: 15284

BCL Project:

BCL Work Order:

Enclosed are the results of analyses for samples received by the laboratory on 3/30/2017. If you have any questions concerning this report, please feel free to contact me.

Invoice ID:

1708436

Alameda Point

B264632

Contact Person: Kerrie Vaughan Authorized Signature

Sincerely, Client Services

Certifications: CA ELAP #1186; NV #CA00014; OR ELAP #4032-001; AK UST101

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Table of Contents

Sample Information Chain of Custody and Cooler Receipt form

Laboratory / Client Sample Cross Reference

Sample Results 1708436-01 - Composite 1-O-A,1-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-02 - Composite 1-W-A,1-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-03 - Composite 2-O-A,2-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-04 - Composite 2-W-A,2-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-05 - Composite 3-O-A,3-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-06 - Composite 3-W-A,3-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-07 - Composite 4-O-A,4-O-B

Organochlorine Pesticides (EPA Method 8081A)

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Table of Contents

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-08 - Composite 4-W-A,4-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-09 - Composite 5-O-A,5-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-10 - Composite 5-W-A,5-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-11 - Composite 6-O-A,6-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-12 - Composite 6-W-A,6-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-13 - Composite 7-O-A,7-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Table of Contents

1708436-14 - Composite 7-W-A,7-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-15 - Composite 8-O-A,8-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-16 - Composite 8-W-A,8-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-17 - Composite 9-O-A,9-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-18 - Composite 9-W-A,9-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-19 - Composite 10-O-A,10-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-20 - Composite 10-W-A,10-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Table of Contents

Chemical Analysis

Total Concentrations (TTLC)

1708436-21 - Composite 11-O-A,11-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-22 - Composite 11-W-A,11-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-23 - Composite 12-O-A,12-O-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

1708436-24 - Composite 12-W-A,12-W-B

Organochlorine Pesticides (EPA Method 8081A)

PCB Analysis (EPA Method 8082)

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Purgeable Aromatics and Total Petroleum Hydrocarbons

Total Petroleum Hydrocarbons

Chemical Analysis

Total Concentrations (TTLC)

Quality Control Reports Organochlorine Pesticides (EPA Method 8081A)

Method Blank Analysis

Laboratory Control Sample

Precision and Accuracy

PCB Analysis (EPA Method 8082)

Method Blank Analysis

Laboratory Control Sample

Precision and Accuracy

Polynuclear Aromatic Hydrocarbons (EPA Method 8270C-SIM)

Method Blank Analysis

Laboratory Control Sample

Precision and Accuracy

Purgeable Aromatics and Total Petroleum Hydrocarbons

Method Blank Analysis

Laboratory Control Sample

Precision and Accuracy

Total Petroleum Hydrocarbons

Method Blank Analysis

Laboratory Control Sample

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Table of Contents

Precision and Accuracy

Chemical Analysis

Precision and Accuracy

Total Concentrations (TTLC)

Method Blank Analysis

Laboratory Control Sample

Precision and Accuracy

Notes Notes and Definitions

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 1 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 2 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 3 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 4 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 5 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 6 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 7 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 8 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 9 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 10 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

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Chain of Custody and Cooler Receipt Form for 1708436 Page 11 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.bclabs.com Page 17 of 250

Chain of Custody and Cooler Receipt Form for 1708436 Page 12 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.bclabs.com Page 18 of 250

Chain of Custody and Cooler Receipt Form for 1708436 Page 13 of 13

The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation.

4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.bclabs.com Page 19 of 250

H.T. Harvey & Associates

983 University Avenue, Building D

Los Gatos, CA 95032

Project:

Project Number:

Project Manager:

Alameda Point

15284

Matt Pollock

Reported: 04/14/2017 10:38

Laboratory / Client Sample Cross Reference

Laboratory Client Sample Information

1708436-01

Sampling Point:

Sampling Location:

Project Number:

COC Number: ---

Composite 1-O-A,1-O-B

Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix:

03/30/2017 22:30

03/30/2017 00:00

Solids

---Sampled By: Sample Type: Soil

1708436-02

Sampling Point:

Sampling Location:

Project Number:

COC Number: ---

Composite 1-W-A,1-W-B

Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix:

03/30/2017 22:30

03/30/2017 00:00

Solids

---Sampled By: Sample Type: Soil

1708436-03

Sampling Point:

Sampling Location:

Project Number:

COC Number: ---

Composite 2-O-A,2-O-B

Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix:

03/30/2017 22:30

03/30/2017 00:00

Solids

---Sampled By: Sample Type: Soil

1708436-04

Sampling Point:

Sampling Location:

Project Number:

COC Number: ---

Composite 2-W-A,2-W-B

Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix:

03/30/2017 22:30

03/30/2017 00:00

Solids

---Sampled By: Sample Type: Soil

1708436-05

Sampling Point:

Sampling Location:

Project Number:

COC Number: ---

Composite 3-O-A,3-O-B

Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix:

03/30/2017 22:30

03/30/2017 00:00

Solids

---Sampled By: Sample Type: Soil

1708436-06

Sampling Point:

Sampling Location:

Project Number:

COC Number: ---

Composite 3-W-A,3-W-B

Receive Date:

Sampling Date:

Sample Depth:

Lab Matrix:

03/30/2017 22:30

03/30/2017 00:00

Solids

---Sampled By: Sample Type: Soil

170843…