P907 TPS UST Site Assessment Report.pdf

17425 NE Union Hill Road, Suite 250 Redmond, Washington 98052

425.861.6000

May 17, 2019

The United States Navy c/o Notkin Mechanical Engineers 2301 Fifth Avenue, Suite 401 Seattle, Washington 98121

Attention: Peter Sloane

Subject: Underground Storage Tank Pre-Decommissioning Environmental Services P-907 Fuel Facility and Vessel Maintenance Facility Naval Base Kitsap Bangor, Washington File No. 0144-488-00

1.0 INTRODUCTION

This letter report presents the results of the underground storage tank (UST) pre-decommissioning site assessment activities completed by GeoEngineers Inc. (GeoEngineers) as part of the P-907 Pier and Vessel Maintenance Facility (VMF) project at Naval Base Kitsap, Bangor, Washington.

The purpose of the site assessment activities was to evaluate and document shallow subsurface conditions at an existing UST system, which is located on Wahoo Road southeast of the service pier, to support recommendations for the proposed decommissioning of two of the three marine diesel USTs that are currently in use at the facility. The evaluation of subsurface conditions was completed to support completion of the Washington State Department of Ecology (Ecology) Site Check/Site Assessment Checklist that is required for the permanent closure or change in service of UST systems. A copy of the Site Assessment Checklist that will need to be completed as part of the Site Assessment Report to document the planned UST decommissioning is included in Appendix C.

The UST system area (the Site) is shown relative to surrounding physical features on the Vicinity Map (Figure 1), and the USTs, boring locations, and nearby utilities are shown on the Site Plan (Figure 2). This letter report addresses the investigative activities related to the USTs discussed below. There are also two geotechnical reports for the project, one for the upland portions of the project including the new underground fuel facility and Vessel Maintenance Facility (VMF) and another for the Pier.

1.1 Scope of Services

GeoEngineers’ services were completed in general accordance with the Professional Services Subconsultant Agreement, Indefinite Quantity Contract, Project N44255-16-D-2006, between Notkin

United States Navy – Naval Base Kitsap | May 17, 2019 Page 2

File No. 0144-488-00

Mechanical Engineers and GeoEngineers, Inc. (GeoEngineers) dated September 29, 2017 and Consultant Agreement 02 dated July 6, 2018. Our specific scope of services for this portion of the project includes:

■ reviewing previous environmental information supplied by the Navy regarding the UST system;

■ completing direct-push borings to characterize subsurface conditions;

■ laboratory analysis of selected soil and groundwater samples obtained from the borings and the existing monitoring well;

■ developing recommendations for the planned UST decommissioning project; and

■ preparing this report.

The results below may be used as part of the Site Assessment report that is required at the time the USTs are decommissioned, whether they are closed in place or removed from the ground. The Site Assessment report and checklist must be submitted to Ecology’s UST program after decommissioning activities are complete.

2.0 PROJECT DESCRIPTION AND BACKGROUND

GeoEngineers’ understanding of the project, based on discussions with the project team, is that two of the three existing 10,000-gallon USTs containing marine diesel fuel at the facility are planned to be decommissioned and replaced by new 20,000-gallon USTs installed elsewhere as part of the P-907project.

2.1 UST System Setting and Previous Environmental Investigations

The USTs, which were installed at some time prior to 1990, are located in a grass-sloped area on the east side of Wahoo Road near its north terminus at the service pier. Naval Base Kitsap buildings 7101 and 7103 and an associated parking lot are located to the north/northeast of the USTs, a grass area that slopes up to a parking lot is located to the east and south, and Wahoo Road is located to the west. The three USTs are co-located within an excavation cut into the native very dense glacial till. The UST excavation was backfilled with pea gravel then covered with fill soil and grass leaving the UST fill and access ports exposed.

A previous release of approximately 140-gallons of diesel that occurred in October 1990 during a tank tightness test was investigated by Hart Crowser in 1991 (Hart Crowser, 1991) and Shannon and Wilson in 2000 (Shannon and Wilson, 2000). Hart Crowser installed five steel hydrocarbon probes to measure any free phase hydrocarbons (free product) within the pea gravel backfill around the tanks and in shallow fill soil downgradient from the tanks and found measurable product in probes WP-1 and WP-3 to the northeast and south of the USTs in the excavation backfill.

The information provided to us indicates that sometime after Hart Crowser’s investigation was completed, a pump and treat system including four extraction wells and an oil-water separator was installed within the excavation boundary, although there is no documentation that the system was ever operated and recovered any product (Shannon and Wilson, 2000).

Shannon and Wilson drilled three borings (B-02 through B-04) and installed one monitoring well (MW-01) to sample soil and groundwater in the vicinity of the USTs. Field screening evidence of contamination was

United States Navy – Naval Base Kitsap | May 17, 2019 Page 3 not observed, and total petroleum hydrocarbons were not detected in any of the soil or groundwater samples submitted for analysis.

The reconnaissance for this current investigation identified that hydrocarbon probes WP-1 and WP-2, the four pump and treat system extraction wells, and monitoring well MW-01 are still in place at the Site.

3.0 FIELD EXPLORATIONS AND LABORATORY TESTING

3.1 Field Explorations

Subsurface soil and groundwater conditions at the Site were evaluated by reviewing available information, including UST as-builts and previous environmental reports, provided by the Navy (listed in Section 6.0 References of this report), inspecting the existing hydrocarbon probes, extraction wells, and monitoring well MW-01, and drilling six borings (GEI-1 through GEI-6) to depths from 5 to 17.5 feet below ground surface (bgs). The borings were initiated using a vacuum truck (vactor truck) due to the potential presence of utilities in the shallow subsurface, then completed with track-mounted direct-push drilling equipment. A representative of GeoEngineers observed and documented the subsurface conditions encountered during the investigation and obtained soil samples for field screening and selected laboratory chemical analysis.

The approximate locations of the explorations completed for this project (and the historical borings and wells described in Section 2.0) are shown on Figure 2. Exploration and sampling procedures and the exploration logs are presented in Appendix A.

3.2 Laboratory Testing

Select soil and groundwater samples obtained during the drilling program were submitted to OnSite Environmental in Redmond, Washington for chemical analysis for one or more of the following:

■ Hydrocarbon identification using Northwest Method NWTPH-HCID;

■ Organochlorine Pesticides by EPA 8081B;

■ Polychlorinated Biphenyls (PCBs) by EPA Method 8082A;

■ Resource Conservation and Recovery Act (RCRA) 8 metals (and copper, nickel, and zinc) by EPA 6000/7000 series;

■ Semivolatile organic compounds (SVOCs) and low-level polycyclic aromatic hydrocarbons (PAHs) using EPA Method 8270D/SIM; and

■ Volatile organic compounds (VOCs) including benzene, toluene, ethylbenzene and xylenes (BTEX) using U.S. Environmental Protection Agency (EPA) Method 8260C.

Note that PCB, SVOC, and organochlorine pesticide analyses were completed on one sample for investigation derived waste (IDW) soil disposal characterization purposes per soil characterization guidance provided by the Navy.

3.3 Investigation Derived Waste Disposal

Drill cuttings and a de minimis amount of decontamination/purge water generated during the drilling activities were placed in a sealed and labeled 55-gallon drum at a secure location on the Base. When soil

United States Navy – Naval Base Kitsap | May 17, 2019 Page 4 profiling is complete, and analytical information has been reviewed by the environmental group at the Base, GeoEngineers will arrange for the removal and permitted disposal of the drummed material.

4.0 SITE ASSESSMENT FINDINGS

4.1 General

The UST system area investigation was conducted on October 30, 2018. Six direct-push environmental borings were completed at the approximate locations indicated on Figure 2. The boring locations were selected based on the location and orientation of the USTs, the presence of underground utilities, and interpreted hydrogeology based on the previous drilling at the Site by others. The rational for the individual boring locations are outlined in the table below, as well as the boring placement relative to the UST excavation area. Borings GEI-1 through GEI-6 were advanced to total depths ranging between 5 and

17.5 feet bgs.

Existing hydrocarbon probes WP-1 and WP-2, the western pair of extraction wells, and monitoring well MW-01 were opened, inspected and probed using an electronic water-level indicator for the presence of water or free-product. The eastern pair of extraction wells were not investigated because they could not be opened without potentially damaging the well casing.

BORING PLACEMENT

Boring Rationale Boring Location Relative to UST Excavation Area

GEI-1 Approximate eastern boundary of UST Excavation Within UST excavation (pea gravel backfill encountered)

GEI-2 Approximate western boundary of UST Excavation

Outside of UST excavation (fill and native soil encountered)

GEI-3 Hydrogeologically downgradient of UST system (based on the anticipated flow of groundwater to the west-northwest) and along a utility corridor (potential preferential pathway for contamination)

GEI-4 Approximate southern boundary of UST Excavation

GEI-5 To the north and hydrogeologically downgradient of UST system and along a utility corridor (potential preferential pathway for contamination)

GEI-6

4.2 Soil Conditions

4.2.1 Outside UST Excavation Area (GEI-2 through GEI-6)

Soil conditions encountered beneath the asphalt or grass surface at boring locations outside the UST excavation area (GEI-2 through GEI-6) primarily consisted of sand with silt and gravel (fill material) to a depth of approximately 4.5 to 7 feet bgs. The underlying native material consisting of very dense silty sand (glacial till) was observed in borings GEI-2, -3, -4, and -6; native material was not reached in boring GEI-5 because pea gravel (likely utility trench backfill) was encountered at 5 feet bgs. Direct-push drilling equipment reached refusal near the top of the glacial till unit, therefore deeper soils were not documented.

United States Navy – Naval Base Kitsap | May 17, 2019 Page 5

4.2.2 Within UST Excavation Area (GEI-1)

Boring GEI-1 was advanced within the UST excavation area to document subsurface conditions immediately surrounding the tanks. Soil conditions encountered beneath the grass surface consisted of silty sand with gravel and minor concrete debris (fill material) to a depth of approximately 14.5 feet bgs. Pea gravel (UST backfill material) was observed from 14.5 to 17.5 feet bgs. The boring was terminated at 17.5 feet bgs where a very dense unit (a concrete-like matrix) was encountered.

4.3 Groundwater Conditions

Minor perched groundwater was encountered in boring GEI-4 at approximately 6.5 feet bgs in fill soil overlying the glacial till unit. Perched groundwater was also identified in the pea gravel within the UST excavation in boring GEI-1 at approximately 14.5 feet bgs. Although the exact screened interval is unknown, groundwater was measured in existing monitoring well MW-01 at approximately 23.5 feet bgs; the total depth of MW-01 is approximately 37 feet bgs based on field measurements.

Groundwater was not observed in the remaining borings, accessible extraction wells, or hydrocarbon probes. Additionally, free product indicative of the historic release was not observed in any of these locations.

4.4 Soil Field Screening and Chemical Analytical Results

Soil from the explorations was field screened for physical evidence of petroleum and VOCs using visual, water sheen and headspace vapor screening methods; field screening did not indicate evidence of potential contamination in soil samples from the borings. Field screening results are shown on the exploration logs and field screening results for samples that were chemically analyzed are presented in Table 1.

Four soil samples from the borings were submitted for chemical analysis for total petroleum hydrocarbons, and metals. One soil sample (GEI-3-5.0) was submitted for additional analyses including PCBs, SVOCs and PAHs, and organochlorine pesticides for soil disposal characterization purposes. The soil chemical analytical results are summarized below.

■ Total petroleum hydrocarbons, VOCs, SVOCs and PAHs, PCBs, organochlorine pesticides, and metals including arsenic, cadmium, lead, mercury, selenium, and silver were not detected at concentrations greater than the laboratory reporting limits in any of the samples analyzed.

■ Metals including barium, chromium, copper, nickel, and zinc were detected at concentrations greater than the laboratory reporting limits, but all of the detected concentrations were less than the Ecology Model Toxics Control act (MTCA) Method A cleanup levels (CULs) and similar to published values for natural background concentrations in Puget Sound soils (where available).

4.5 Groundwater Chemical Analytical Results

A groundwater sample was obtained from monitoring well MW-01 using a new disposable bailer. The sample was collected via bailer because groundwater was too deep to use a peristaltic pump and a bladder pump was not available on site. No field screening indications of contamination (like odor, sheen, or visible product) were observed in the sample. The groundwater sample was submitted for chemical analysis for total petroleum hydrocarbons and VOCs. The groundwater sample chemical analytical results are summarized below and presented in Table 1.

United States Navy – Naval Base Kitsap | May 17, 2019 Page 6

■ Total petroleum hydrocarbons and VOCs (excluding 1,1-dichloroethane and 1,1,1-trichloroethane) were not detected at concentrations greater than the laboratory reporting limits in the groundwater sample.

■ The VOCs 1,1-dichloroethane and 1,1,1-trichloroethane were detected in the groundwater at concentrations greater than the laboratory reporting limits, but below their respective MTCA Method A or Method B CULs (no MTCA Method A CUL is established for 1,1-dichloroethane).

The groundwater analytical results are summarized in Table 1. Field procedures and boring logs are presented in Appendix A. Copies of the chemical analytical laboratory reports are provided in Appendix B.

5.0 CONCLUSIONS AND RECOMMENDATIONS

The results of the soil and groundwater investigation in the vicinity of the marine diesel fuel UST system provide information regarding current shallow subsurface conditions. The investigation found no evidence of soil or groundwater contamination associated with the USTs.

A summary of the findings is as follows:

■ Contaminants of concern, specifically total petroleum hydrocarbons and VOCs (indicative of a petroleum release) were not detected in the soil samples tested, and there was no field screening evidence of potential contamination during drilling and sampling.

■ Petroleum hydrocarbons and VOCs (excluding 1,1-dichloroethane and 1,1,1-trichloroethane) were not detected in the groundwater sample from monitoring well MW-01. The VOCs 1,1-dichloroethane and 1,1,1-trichloroethane were detected, but the detected concentrations were less than the MTCA CULs.

■ Metals either were not detected in the soil samples tested, or the detected concentrations were less than the MTCA CULs.

■ Field screening during drilling and sampling did not indicate evidence of potential petroleum hydrocarbon contamination in soil or groundwater. Free product was not observed in the remaining hydrocarbon probes (WP-1 and WP-2) or in the accessible extraction wells (western pair in Wahoo Road) downgradient of the USTs.

■ Minor perched groundwater was observed in fill soil at approximately 6.5 feet bgs in boring GEI-4, and within UST excavation backfill at approximately 14.5 feet bgs in boring GEI-1.

■ Locally contiguous groundwater was not encountered during drilling but was measured in existing monitoring well MW-01 at a depth of approximately 23.5 feet bgs.

Based on the chemical analytical results described above and observations made during drilling and sampling, there is no evidence of local or widespread petroleum hydrocarbon contamination associated with the UST system, or the previously reported historical release (140 gallons) in 1990. Groundwater is unlikely to be impacted based on the sampling conducted from downgradient monitoring well MW-01, although additional groundwater sampling may be needed at the time of the decommissioning work if significant perched groundwater is identified in the UST excavation and surrounding soil.

United States Navy – Naval Base Kitsap | May 17, 2019 Page 7

Special soil handling or disposal requirements will likely not be needed for soil excavated during the UST decommissioning process based on the data collected during this investigation. However, given the known historic release at the Site and the age of the UST system, planning for UST decommissioning should include environmental support to complete the Site Assessment process required by Ecology and to address any impacted or contaminated soil or groundwater encountered during the UST decommissioning process.

5.1 UST Decommissioning Specifications

Specifications for the planned UST Decommissioning will be provided as a separate submittal.

6.0 REFERENCES

Hart Crowser. 1991. “Delivery Order No. 3, Contract N62474-90-D-6544, Marine Diesel Fuel Tanks at Subbase Bangor Service Pier.” May 21, 1991.

Shannon and Wilson. 2000. “Environmental Report, Building 7101, Naval Submarine Base, Bangor, Silverdale, Washington.” March 2000.

United States Navy – Naval Base Kitsap | May 17, 2019 Page 8

7.0 LIMITATIONS

This report for the Naval Base Kitsap – P-907 Pier and VMF Project site has been prepared for the exclusive use of our client, the United States Navy and Notkin Mechanical Engineers, their authorized agents and regulatory agencies. This report is not intended for use by others, and the information contained herein is not applicable to other sites. No other party may rely on the product of our services unless we agree in advance and in writing to such reliance. Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted environmental science practices in this area at the time this report was prepared. No warranty or other conditions, express or implied, should be understood. It is always possible that contamination exists in areas that were not explored, sampled or analyzed.

Any electronic form, facsimile, or hard copy of the original document (email, text, table and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record.

Sincerely, GeoEngineers, Inc.

Sydney J. Bronson, PE Tim L. Syverson, LHG Environmental Engineer Associate

SJB:TLS:ch:tln cc: Justin Rygel, PE

BergerABAM

Attachments:

Table 1. Soil and Groundwater Field Screening and Chemical Analytical Data

Figure 1. Vicinity Map

Figure 2. Site Plan

Appendix A. Field Procedures and Exploration Logs

Figure A-1 – Key to Exploration Logs

Figures A-2 through A-7 – Log of Borings

Appendix B. Chemical Analytical Program

Appendix C. Washington State Department of Ecology Site Assessment Checklist

Appendix D. Report Limitations and Guidelines for Use

Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record.

Sample Matrix

Sample Location1 GEI-2 GEI-3 GEI-4 GEI-6 MW-01

Sample ID1 GEI-2-5.0 GEI-3-5.0 GEI-4-6.5 GEI-6-6.5

MW-01-

181030

Sample Date 10/30/18

Sample Depth (feet bgs) 5 5 6.5 6.5 ~25

Field Screening

Sheen NS NS NS NS NS

Headspace Vapor (ppm) <1 <1 <1 <1 --

Units

Total Petroleum Hydrocarbons by NWTPH-HCID

Hydrocarbon Identification ND ND ND ND NA ND NA

RCRA Metals by EPA 6000/7000 Series

Arsenic ND ND ND ND 20 5

Barium 40 39 51 49 16,000 3,200

Cadmium ND ND ND ND 2 5

Chromium2 34 33 35 38 2,000 50

Copper 16 16 16 19 3,200 640

Lead ND ND ND ND 250 15

Mercury ND ND ND ND 2 2

Nickel 40 39 37 43 880 176

Selenium ND ND ND ND 400 80

Silver ND ND ND ND 400 80

Zinc 30 28 27 32 24,000 4,800

Polychlorinated Biphenyls by EPA Method 8082A

All Aroclors3 NT ND NT NT 1.0 NT 0.1

Organochlorine Pesticides by EPA Method 8081B

All compounds3 NT ND NT NT varies NT varies

Semivolatile Organic Compounds (SVOCs) and Low-level Polycyclic Aromatic Hydrocarbons (PAHs) by EPA Method 8270D/SIM

All compounds3 NT ND NT NT varies NT varies

Volatile Organic Compounds (VOCs) by EPA 8260

1,1-Dichloroethane ND ND ND ND 16,000 0.35 1,600

1,1,1-Trichloroethane ND ND ND ND 2 0.31 200

Other VOCs3 ND ND ND ND varies ND varies

Notes:

1Boring locations are shown on Figure 2. Sample ID nomenclature is 'GEI-boring number-sample depth below ground surface' for soil samples.

2Cleanup level listed is for chromium III. The published background soil metals concentration for chromium is 42 mg/kg.

3See Appendix B for the full list of analytes tested.

MTCA = Model Toxics Control Act NA = not applicable bgs = below ground surface ND = not detected

EPA = U.S. Environmental Protection Agency NS = no sheen mg/kg = milligrams per kilogram NT = not tested µg/L = micrograms per liter SS = slight sheen

Bold indicates analyte was detected.

µg/L

P-907 Fuel Facility and Vessel Maintenance Facility

NT

Table 1 Soil and Groundwater Field Screening and Chemical Analytical Data

UST Pre-Decommissioning Site Assessment

NBK Bangor, Washington

10/30/18

MTCA Method A or B

Cleanup Level

MTCA Method A or B Cleanup

Level for Unrestricted

Land Use

GroundwaterSoil mg/kg

Table 1 | May 17, 2019 Page 1 of 1 µ Vicinity Map

Figure 1

P907 Pier and Maintenance Facility NBK Bangor, Washington

2,000 2,0000

Feet

Data Source: Mapbox Open Street Map, 2018

Notes:

1. The locations of all features shown are approximate.

2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc.

cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication.

Projection: NAD 1983 UTM Zone 10N

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Underground Storage Tank (UST) System

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Pi er

Bu ild in g

Building

Building

Unit Substation 2

GEI-1

GEI-2

GEI-3

GEI-4

GEI-5

GEI-6

WP-1

WP-2

WP-3

WP-4

WP-5

B-02

B-03

B-04MW-01

Extraction Wells

Figure 2

P907 TPP Pier and Maintenance Facility NBK Bangor, Washington

Site Plan

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Notes:

1. The locations of all features shown are approximate.

2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document.

GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication.

Data Source: Sheet E151 "Partial Site Plan" of the P-876 Service Pier Electrical Upgrade Project dated 8-8-17.

Projection: WA State Plane, N Zone, NAD83, US Foot

Feet

030 30

Underground Storage Tanks (USTs)

Soil Boring by GeoEngineers (October 2018)

Exploration Completed by Others (Hart Crowser, 1991 or Shannon & Wilson, 2000)

GEI-1

APPENDIX A

Field Procedures and Exploration Logs

United States Navy – Naval Base Kitsap | May 17, 2019 Page A-1

APPENDIX A

FIELD PROCEDURES AND EXPLORATION LOGS

Underground Utility Locate

Prior to drilling activities, an underground utility locate was conducted in the vicinity of each proposed boring locations to identify subsurface utilities and/or potential underground physical hazards. The underground utility check consisted of contacting a local utility alert service (One-call) and hiring a private utility locating service.

Soil Sampling

Environmental exploration was completed using track-mounted direct-push drilling equipment operated by Holt Services, Inc. of Edgewood, Washington. Continuous soil cores were obtained from the direct-push borings using 2 ¼-inch diameter, 5-foot-long stainless-steel sampler rods driven with a pneumatic hammer.

Soil samples were collected in clean, plastic 1.5-inch-diameter disposable liners. The liners were placed inside the sampling rod and then hydraulically driven or pushed into the soil at the selected sampling depth.

The borings extended to depths ranging between 5 and 17.5 feet bgs.

A representative from our staff observed and classified the soil encountered during explorations. Soil in the explorations was visually classified in general accordance with ASTM International (ASTM) D 2488-94. The exploration logs are presented in Figures A-2 through A-7. A portion of each sample was placed in laboratory-prepared sample jars for possible chemical analysis. The remaining portion of each sample was used for field screening.

Selected samples from the borings were submitted for chemical analysis based on the sample location relative to potential sources of contamination. The soil samples were placed in a cooler with ice for transport to Onsite Environmental in Redmond, Washington. Standard chain-of-custody procedures were followed in transporting the soil samples to the laboratory.

Drill cuttings and decontamination/purge water generated during drilling activities were stored at the Site in a 55-gallon drum at a safe location for foot and vehicle traffic.

Sample Identification Scheme

Each soil sample obtained during the investigation was identified by a unique sample designation. The sample designation was documented in the field report and exploration log, and included on the sample container label and laboratory chain-of-custody. The soil sample designation scheme is as follows:

■ Boring number GEI-1 etc., followed by the depth from which the soil sample was collected, to the nearest 0.5 foot. For example, GEI-1-2.5 is from boring number GEI-1, and sampled from a depth of

2.5 feet bgs.

Groundwater Sample Collection and Handling

A groundwater samples was obtained from monitoring well MW-01 using a disposable bailer. Bailing generated wastewater (de minimus) was drummed with the soil cuttings described above.

United States Navy – Naval Base Kitsap | May 17, 2019 Page A-2

The groundwater sample was transferred directly from the bailer outlet to laboratory-prepared sample containers. New nitrile gloves were worn when collecting the groundwater sample. The sample containers were filled completely and placed in a cooler with ice pending transport to the analytical laboratory. Sample labels were completed, and chain-of-custody procedures were followed in transporting the sample to the laboratory.

Field Screening of Soil Samples

Soil samples obtained from the borings were screened in the field for evidence of contamination using:

(1) visual examination; (2) sheen screening and (3) vapor headspace screening with a photoionization detector (PID). The results of headspace and sheen screening are included in the boring logs and in Table 1 for soil samples tested by chemical analysis.

Visual screening consists of inspecting the soil for stains indicative of petroleum-related contamination.

Visual screening is generally more effective when contamination is related to heavy petroleum hydrocarbons, such as motor oil or hydraulic oil, or when hydrocarbon concentrations are high. Sheen screening and headspace vapor screening are more sensitive methods that have been effective in detecting contamination at concentrations less than regulatory cleanup guidelines. Sheen screening involves placing soil in a pan of water and observing the water surface for signs of sheen. Sheen classifications are as follows:

No Sheen (NS): No visible sheen on water surface.

Slight Sheen (SS): Light, colorless, dull sheen; spread is irregular, not rapid; sheen dissipates rapidly.

Moderate Sheen (MS): Light to heavy sheen, may have some color/iridescence; spread is irregular to flowing; few remaining areas of no sheen on water surface.

Heavy Sheen (HS): Heavy sheen with color/iridescence; spread is rapid; entire water surface may be covered with sheen.

Headspace vapor screening involves placing a soil sample in a plastic sample bag. Air is captured in the bag and the bag is shaken to expose the soil to the air trapped in the bag. The probe of a PID is inserted in the bag and the instrument measures the concentration of combustible vapor in the air removed from the sample headspace. The PID measures concentrations in ppm (parts per million) and is calibrated to isobutylene. The PID is designed to quantify combustible gas and organic vapor concentrations up to 2,500 ppm. A lower threshold of significance of 1 ppm was used in this application. Field screening results are Site-specific and vary with soil type, soil moisture content, temperature and type of contaminant.

Boring Backfilling

The borings were backfilled with bentonite and restored to match the surrounding surface in accordance with applicable regulations for borehole abandonment.

SYMBOLS TYPICAL

DESCRIPTIONS

GW

GP

SW

SP

SM

FINE

GRAINED

SOILS

SILTS AND

CLAYS

NOTE: Multiple symbols are used to indicate borderline or dual soil classifications

MORE THAN 50%

RETAINED ON

NO. 200 SIEVE

MORE THAN 50%

PASSING

NO. 200 SIEVE

GRAVEL

AND

GRAVELLY

SOILS

SC

LIQUID LIMIT

LESS THAN 50

(APPRECIABLE AMOUNT

OF FINES)

(APPRECIABLE AMOUNT

OF FINES)

COARSE

GRAINED

SOILS

MAJOR DIVISIONS

GRAPH LETTER

GM

GC

ML

CL

OL

SILTS AND

CLAYS

SANDS WITH

FINES

SAND

AND

SANDY

SOILS

MH

CH

OH

PT

(LITTLE OR NO FINES)

CLEAN SANDS

GRAVELS WITH

FINES

CLEAN GRAVELS

(LITTLE OR NO FINES)

WELL-GRADED GRAVELS, GRAVEL -

SAND MIXTURES

CLAYEY GRAVELS, GRAVEL - SAND -

CLAY MIXTURES

WELL-GRADED SANDS, GRAVELLY

SANDS

POORLY-GRADED SANDS, GRAVELLY

SAND

SILTY SANDS, SAND - SILT MIXTURES

CLAYEY SANDS, SAND - CLAY

MIXTURES

INORGANIC SILTS, ROCK FLOUR,

CLAYEY SILTS WITH SLIGHT

PLASTICITY

INORGANIC CLAYS OF LOW TO

MEDIUM PLASTICITY, GRAVELLY

CLAYS, SANDY CLAYS, SILTY CLAYS,

LEAN CLAYS

ORGANIC SILTS AND ORGANIC SILTY

CLAYS OF LOW PLASTICITY

INORGANIC SILTS, MICACEOUS OR

DIATOMACEOUS SILTY SOILS

INORGANIC CLAYS OF HIGH

PLASTICITY

ORGANIC CLAYS AND SILTS OF

MEDIUM TO HIGH PLASTICITY

PEAT, HUMUS, SWAMP SOILS WITH

HIGH ORGANIC CONTENTSHIGHLY ORGANIC SOILS

SOIL CLASSIFICATION CHART

MORE THAN 50%

OF COARSE

FRACTION RETAINED

ON NO. 4 SIEVE

MORE THAN 50%

OF COARSE

FRACTION PASSING

ON NO. 4 SIEVE

SILTY GRAVELS, GRAVEL - SAND -

SILT MIXTURES

POORLY-GRADED GRAVELS,

GRAVEL - SAND MIXTURES

LIQUID LIMIT GREATER

THAN 50

Continuous Coring

Bulk or grab

Direct-Push

Piston

Shelby tube

Standard Penetration Test (SPT)

2.4-inch I.D. split barrel

NOTE: The reader must refer to the discussion in the report text and the logs of explorations for a proper understanding of subsurface conditions.

Descriptions on the logs apply only at the specific exploration locations and at the time the explorations were made; they are not warranted to be representative of subsurface conditions at other locations or times.

Blowcount is recorded for driven samplers as the number of blows required to advance sampler 12 inches (or distance noted).

See exploration log for hammer weight and drop.

"P" indicates sampler pushed using the weight of the drill rig.

"WOH" indicates sampler pushed using the weight of the hammer.

Key to Exploration Logs

Figure A-1

Sampler Symbol Descriptions

ADDITIONAL MATERIAL SYMBOLS

NS

SS

MS

HS

SYMBOLS

Asphalt Concrete

Cement Concrete

Crushed Rock/ Quarry Spalls

Topsoil

GRAPH LETTER

AC

CC

SOD Sod/Forest Duff

CR

DESCRIPTIONS

TYPICAL

TS

%F %G

AL

CA

CP

CS

DD

DS

HA

MC

MD

Mohs

OC

PM

PI

PP

SA

TX

UC

VS

Groundwater Contact Measured groundwater level in exploration, well, or piezometer

Measured free product in well or piezometer

Graphic Log Contact Distinct contact between soil strata

Approximate contact between soil strata

Material Description Contact Contact between geologic units

Contact between soil of the same geologic unit

Laboratory / Field Tests Percent fines Percent gravel Atterberg limits Chemical analysis Laboratory compaction test Consolidation test Dry density Direct shear Hydrometer analysis Moisture content Moisture density Mohs hardness scale Organic content Permeability or hydraulic conductivity Plasticity index Pocket penetrometer Sieve analysis Triaxial compression Unconfined compression Vane shear

Sheen Classification No Visible Sheen Slight Sheen Moderate Sheen Heavy Sheen

Rev 06/2017

Approximately 1-foot grass and loam

Brown silty fine to medium sand with gravel and concrete debris (loose, moist) (till)

No recovery

Pea gravel (UST backfill) (loose, wet)

Boring terminated at approximately 17½ feet below ground surface due to refusal

GEI-1-2.0

GEI-1-5.0

GEI-1-7.0

GEI-1-14.5

GEI-1-17.0

SOD

SM

NR

GP

No sheen or odor on gravel backfill Groundwater observed at approximately 14½ feet below ground surface during drilling

Concrete-like matrix in shoe at 17½ feet below ground surface

NS

NS

NS

NS

NS

<1

<1

<1

<1

<1

Notes: Cleared with vacuum truck to 7½ feet below ground surface

17.5

SJB

TLS Holt Services, Inc. Direct-Push

Tracked 7822 DTDrilling Equipment

Pneumatic 140 (lbs) / 30 (in) Drop

Decimal Degrees

WGS84

47.7294 -122.7418

Undetermined

MLLW

Latitude Longitude

Start Total Depth (ft)

Logged By Checked By

End

Surface Elevation (ft) Vertical Datum

Drilled

Hammer Data

System Datum

Driller Drilling Method

See "Remarks" section for groundwater observed

10/30/201810/30/2018

Note: See Figure A-1 for explanation of symbols.

Coordinates Data Source: Horizontal approximated based on topographic survey. Vertical approximated based on topographic survey.

D at e:

/2 /1

P at h:

W

PR

O

JE

C

TS

\0

\0

\G

IN

T\

.G

PJ

D

B Li br ar y/ Li br ar y:

G

EO

EN

G

IN

EE

R

S _D

F_ S

TD

_U

S _J

U N

E_

.G

LB

/G

EI

_E N

VI

R

O N

M

EN

TA

L_

S

TA

N D

AR

D

_N O

_G W

FIELD DATA

MATERIAL

DESCRIPTION

S am pl e

N am e Te st in g

R ec ov er ed (i n)

In te rv al

B lo w s/ fo ot

C ol le ct ed S am pl e

D ep th (f ee t)

G ra ph ic

L og

G ro up C la ss ifi ca tio n

El ev at io n (f ee t)

Sheet 1 of 1Project Number:

Project Location:

Project:

NBK Bangor, Washington

0144-488-00

Log of Direct-Push Boring GEI-1 P907 TPP Pier and Maintenance Facility

Figure A-2

REMARKS

S he en

H ea ds pa ce Va po r

(p pm

Approximately 2 inches asphalt surface (road) Brown to gray fine to medium silty sand with gravel

(dense, moist) (fill)

Became very dense (native)

Boring terminated at approximately 5 feet below ground surface due to refusal

GEI-2-1.75

GEI-2-5.0

CA

36 AC

SM

SM

NS

NS

<1

<1

Notes: Cleared with vacuum truck to 2 feet below ground surface

SJB

TLS Holt Services, Inc. Direct-Push

Tracked 7822 DTDrilling Equipment

Pneumatic 140 (lbs) / 30 (in) Drop

Decimal Degrees

WGS84

47.7295 -122.7419

Undetermined

MLLW

Latitude Longitude

Start Total Depth (ft)

Logged By Checked By

End

Surface Elevation (ft) Vertical Datum

Drilled

Hammer Data

System Datum

Driller Drilling Method

Groundwater not observed at time of exploration

10/30/201810/30/2018

Note: See Figure A-1 for explanation of symbols.

Coordinates Data Source: Horizontal approximated based on topographic survey. Vertical approximated based on topographic survey.

D at e:

/2 /1

P at h:

W

PR

O

JE

C

TS

\0

\0

\G

IN

T\

.G

PJ

D

B Li br ar y/ Li br ar y:

G

EO

EN

G

IN

EE

R

S _D

F_ S

TD

_U

S _J

U N

E_

.G

LB

/G

EI

_E N

VI

R

O N

M

EN

TA

L_

S

TA

N D

AR

D

_N O

_G W

FIELD DATA

MATERIAL

DESCRIPTION

S am pl e

N am e Te st in g

R ec ov er ed (i n)

In te rv al

B lo w s/ fo ot

C ol le ct ed S am pl e

D ep th (f ee t)

G ra ph ic

L og

G ro up C la ss ifi ca tio n

El ev at io n (f ee t)

Sheet 1 of 1Project Number:

Project Location:

Project:

NBK Bangor, Washington

0144-488-00

Log of Direct-Push Boring GEI-2 P907 TPP Pier and Maintenance Facility

Figure A-3

REMARKS

S he en

H ea ds pa ce Va po r

(p

Approximately 2 inches asphalt surface (road) Brown to gray silty fine to medium sand with gravel

(dense, moist) (fill)

Becomes very dense, native

Boring terminated at approximately 7½ feet below ground surface due to refusal

GEI-3-3.0

GEI-3-5.0

CA

GEI-3-7.0

AC

SM

NS

NS

NS

<1

<1

<1

Notes: Cleared with vacuum truck to 2 feet below ground surface

7.5

SJB

TLS Holt Services, Inc. Direct-Push

Tracked 7822 DTDrilling Equipment

Pneumatic 140 (lbs) / 30 (in) Drop

Decimal Degrees

WGS84

47.7295 -122.7418

Undetermined

MLLW

Latitude Longitude

Start Total Depth (ft)

Logged By Checked By

End

Surface Elevation (ft) Vertical Datum

Drilled

Hammer Data

System Datum

Driller Drilling Method

Groundwater not observed at time of exploration

10/30/201810/30/2018

Note: See Figure A-1 for explanation of symbols.

Coordinates Data Source: Horizontal approximated based on topographic survey. Vertical approximated based on topographic survey.

D at e:

/2 /1

P at h:

W

PR

O

JE

C

TS

\0

\0

\G

IN

T\

.G

PJ

D

B Li br ar y/ Li br ar y:

G

EO

EN

G

IN

EE

R

S _D

F_ S

TD

_U

S _J

U N

E_

.G

LB

/G

EI

_E N

VI

R

O N

M

EN

TA

L_

S

TA

N D

AR

D

_N O

_G W

FIELD DATA

MATERIAL

DESCRIPTION

S am pl e

N am e Te st in g

R ec ov er ed (i n)

In te rv al

B lo w s/ fo ot

C ol le ct ed S am pl e

D ep th (f ee t)

G ra ph ic

L og

G ro up C la ss ifi ca tio n

El ev at io n (f ee t)

Sheet 1 of 1Project Number:

Project Location:

Project:

NBK Bangor, Washington

0144-488-00

Log of Direct-Push Boring GEI-3 P907 TPP Pier and Maintenance Facility

Figure A-4

REMARKS

S he en

H ea ds pa ce Va po r

(p

1-foot grass and loam

Brown fine to coarse sand with silt and gravel (loose, moist) (fill)

Gray to brown silty fine to medium sand with gravel (dense, moist) (native)

Becomes wet at 6½ feet below ground surface Boring terminated at approximately 7½ feet below ground surface due to refusal

GEI-4-2.5

GEI-4-6.5

CA

SOD

SP-SM

SM

Perched groundwater observed at approximately

6½ feet below ground surface during drilling

NS

NS

<1

<1

Notes: Cleared with vacuum truck to 5½ feet below ground surface

7.5

SJB

TLS Holt Services, Inc. Direct-Push

Tracked 7822 DTDrilling Equipment

Pneumatic 140 (lbs) / 30 (in) Drop

Decimal Degrees

WGS84

47.7294 -122.7418

Undetermined

MLLW

Latitude Longitude

Start Total Depth (ft)

Logged By Checked By

End

Surface Elevation (ft) Vertical Datum

Drilled

Hammer Data

System Datum

Driller Drilling Method

See "Remarks" section for groundwater observed

10/30/201810/30/2018

Note: See Figure A-1 for explanation of symbols.

Coordinates Data Source: Horizontal approximated based on topographic survey. Vertical approximated based on topographic survey.

D at e:

/2 /1

P at h:

W

PR

O

JE

C

TS

\0

\0

\G

IN

T\

.G

PJ

D

B Li br ar y/ Li br ar y:

G

EO

EN

G

IN

EE

R

S _D

F_ S

TD

_U

S _J

U N

E_

.G

LB

/G

EI

_E N

VI

R

O N

M

EN

TA

L_

S

TA

N D

AR

D

_N O

_G W

FIELD DATA

MATERIAL

DESCRIPTION

S am pl e

N am e Te st in g

R ec ov er ed (i n)

In te rv al

B lo w s/ fo ot

C ol le ct ed S am pl e

D ep th (f ee t)

G ra ph ic

L og

G ro up C la ss ifi ca tio n

El ev at io n (f ee t)

Sheet 1 of 1Project Number:

Project Location:

Project:

NBK Bangor, Washington

0144-488-00

Log of Direct-Push Boring GEI-4 P907 TPP Pier and Maintenance Facility

Figure A-5

REMARKS

S he en

H ea ds pa ce Va po r

(p

Approximately 2 inches of asphalt surface Brown silty fine to medium sand with gravel (loose, moist) (fill)

Pea gravel encountered at 5 feet below ground surface

GEI-5-2.5

GEI-5-4.5

AC

SM

NS

NS

<1

<1

Notes: Cleared with vacuum truck to 5 feet below ground surface

SJB

TLS Holt Services, Inc. Direct-Push

Tracked 7822 DTDrilling Equipment

Pneumatic 140 (lbs) / 30 (in) Drop

Decimal Degrees

WGS84

47.7296 -122.7418

Undetermined

MLLW

Latitude Longitude

Start Total Depth (ft)

Logged By Checked By

End

Surface Elevation (ft) Vertical Datum

Drilled

Hammer Data

System Datum

Driller Drilling Method

Groundwater not observed at time of exploration

10/30/201810/30/2018

Note: See Figure A-1 for explanation of symbols.

Coordinates Data Source: Horizontal approximated based on topographic survey. Vertical approximated based on topographic survey.

D at e:

/2 /1

P at h:

W

PR

O

JE

C

TS

\0

\0

\G

IN

T\

.G

PJ

D

B Li br ar y/ Li br ar y:

G

EO

EN

G

IN

EE

R

S _D

F_ S

TD

_U

S _J

U N

E_

.G

LB

/G

EI

_E N

VI

R

O N

M

EN

TA

L_

S

TA

N D

AR

D

_N O

_G W

FIELD DATA

MATERIAL

DESCRIPTION

S am pl e

N am e Te st in g

R ec ov er ed (i n)

In te rv al

B lo w s/ fo ot

C ol le ct ed S am pl e

D ep th (f ee t)

G ra ph ic

L og

G ro up C la ss ifi ca tio n

El ev at io n (f ee t)

Sheet 1 of 1Project Number:

Project Location:

Project:

NBK Bangor, Washington

0144-488-00

Log of Direct-Push Boring GEI-5 P907 TPP Pier and Maintenance Facility

Figure A-6

REMARKS

S he en

H ea ds pa ce Va po r

(p

Approximately 2 inches asphalt surface Brown silty fine to medium sand with gravel and organic debris (pine needles) (loose, moist) (fill)

Becomes dense at 7 feet below ground surface (moist) (native)

Boring terminated at approximately 7 feet below ground surface due to refusal

GEI-6-2.5

GEI-6-6.5

CA

AC

SM

Till-like matrix at 7 feet below ground surface

NS

NS

<1

<1

Notes: Cleared with vacuum truck to 5 feet below ground surface

SJB

TLS Holt Services, Inc. Direct-Push

Tracked 7822 DTDrilling Equipment

Pneumatic 140 (lbs) / 30 (in) Drop

Decimal Degrees

WGS84

47.7296 -122.7418

Undetermined

MLLW

Latitude Longitude

Start Total Depth (ft)

Logged By Checked By

End

Surface Elevation (ft) Vertical Datum

Drilled

Hammer Data

System Datum

Driller Drilling Method

See "Remarks" section for groundwater observed

10/30/201810/30/2018

Note: See Figure A-1 for explanation of symbols.

Coordinates Data Source: Horizontal approximated based on topographic survey. Vertical approximated based on topographic survey.

D at e:

/2 /1

P at h:

W

PR

O

JE

C

TS

\0

\0

\G

IN

T\

.G

PJ

D

B Li br ar y/ Li br ar y:

G

EO

EN

G

IN

EE

R

S _D

F_ S

TD

_U

S _J

U N

E_

.G

LB

/G

EI

_E N

VI

R

O N

M

EN

TA

L_

S

TA

N D

AR

D

_N O

_G W

FIELD DATA

MATERIAL

DESCRIPTION

S am pl e

N am e Te st in g

R ec ov er ed (i n)

In te rv al

B lo w s/ fo ot

C ol le ct ed S am pl e

D ep th (f ee t)

G ra ph ic

L og

G ro up C la ss ifi ca tio n

El ev at io n (f ee t)

Sheet 1 of 1Project Number:

Project Location:

Project:

NBK Bangor, Washington

0144-488-00

Log of Direct-Push Boring GEI-6 P907 TPP Pier and Maintenance Facility

Figure A-7

REMARKS

S he en

H ea ds pa ce Va po r

(p

APPENDIX B

Chemical Analytical Program

United States Navy – Naval Base Kitsap | May 17, 2019 Page B-1

APPENDIX B

CHEMICAL ANALYTICAL PROGRAM

Analytical Methods

Chain-of-custody procedures were followed during the transport of the field samples to the analytical laboratory. The samples were held in cold storage pending extraction and/or analysis. The analytical results, analytical methods reference and laboratory quality control records are included in this appendix. The analytical results are also summarized in the text and tables of this report.

Analytical Data Review

The laboratory maintains an internal quality assurance program as documented in its laboratory quality assurance manual. The laboratory uses a combination of blanks, surrogate recoveries, duplicates, matrix spike recoveries, matrix spike duplicate recoveries, blank spike recoveries and blank spike duplicate recoveries to evaluate the validity of the analytical results. The laboratory also uses data quality goals for individual chemicals or groups of chemicals based on the long-term performance of the test methods. The data quality goals were included in the laboratory reports. The laboratory compared each group of samples with the existing data quality goals and noted any exceptions in the laboratory report.

Analytical Data Review Summary

No data quality exceptions were noted during our review of the laboratory report. Based on review of the analytical data, it is our opinion that the analytical data are of acceptable quality for their intended use.

OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881

This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed.

14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881

November 7, 2018

Sydney Bronson GeoEngineers, Inc.

1101 Fawcett Avenue South, Unit 200 Tacoma, WA 98402

Re: Analytical Data for Project 0144-488-00 Laboratory Reference No. 1810-377

Dear Sydney:

Enclosed are the analytical results and associated quality control data for samples submitted on October 30, 2018.

The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory.

We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me.

Sincerely, David Baumeister Project Manager

Enclosures

Date of Report: November 7, 2018 Samples Submitted: October 30, 2018 Laboratory Reference: 1810-377 Project: 0144-488-00

Case Narrative

Samples were collected on October 30, 2018 and received by the laboratory on October 30, 2018. They were maintained at the laboratory at a temperature of 2oC to 6oC.

Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below.

General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below.

Date of Report: November 7, 2018 Samples Submitted: October 30, 2018

ANALYTICAL REPORT FOR SAMPLES

Client ID Laboratory ID Matrix Date Sampled Date Received Notes

GEI-2-5.0 10-377-01 Soil 10-30-18 10-30-18

GEI-3-5.0 10-377-02 Soil 10-30-18 10-30-18

GEI-4-6.5 10-377-03 Soil 10-30-18 10-30-18

GEI-6-6.5 10-377-04 Soil 10-30-18 10-30-18

MW-01-181030 10-377-05 Water 10-30-18 10-30-18

Date of Report: November 7, 2018 Samples Submitted: October 30, 2018

HYDROCARBON IDENTIFICATION

NWTPH-HCID

Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: GEI-2-5.0 Laboratory ID: 10-377-01 Gasoline Range Organics ND 22 NWTPH-HCID 10-31-18 10-31-18 Diesel Range Organics ND 54 NWTPH-HCID 10-31-18 10-31-18 Lube Oil Range Organics ND 110 NWTPH-HCID 10-31-18 10-31-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 103 50-150

Client ID: GEI-3-5.0 Laboratory ID: 10-377-02 Gasoline Range Organics ND 22 NWTPH-HCID 10-31-18 10-31-18 Diesel Range Organics ND 54 NWTPH-HCID 10-31-18 10-31-18 Lube Oil Range Organics ND 110 NWTPH-HCID 10-31-18 10-31-18 o-Terphenyl 108 50-150

Client ID: GEI-4-6.5 Laboratory ID: 10-377-03 Gasoline Range Organics ND 23 NWTPH-HCID 10-31-18 10-31-18 Diesel Range Organics ND 56 NWTPH-HCID 10-31-18 10-31-18 Lube Oil Range Organics ND 110 NWTPH-HCID 10-31-18 10-31-18 o-Terphenyl 108 50-150

Client ID: GEI-6-6.5 Laboratory ID: 10-377-04 Gasoline Range Organics ND 21 NWTPH-HCID 10-31-18 10-31-18 Diesel Range Organics ND 53 NWTPH-HCID 10-31-18 10-31-18 Lube Oil Range Organics ND 110 NWTPH-HCID 10-31-18 10-31-18 o-Terphenyl 104 50-150

Date of Report: November 7, 2018 Samples Submitted: October 30, 2018

Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-01-181030 Laboratory ID: 10-377-05 Gasoline Range Organics ND 0.10 NWTPH-HCID 10-31-18 10-31-18 Diesel Range Organics ND 0.26 NWTPH-HCID 10-31-18 10-31-18 Lube Oil Range Organics ND 0.42 NWTPH-HCID 10-31-18 10-31-18 o-Terphenyl 102 50-150

Date of Report: November 7, 2018 Samples Submitted: October 30, 2018

VOLATILE ORGANICS EPA 8260C

Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags

Client ID: GEI-2-5.0 Laboratory ID: 10-377-01 Dichlorodifluoromethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Chloromethane ND 0.0095 EPA 8260C 11-2-18 11-2-18 Vinyl Chloride ND 0.0019 EPA 8260C 11-2-18 11-2-18 Bromomethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Chloroethane ND 0.0095 EPA 8260C 11-2-18 11-2-18 Trichlorofluoromethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 1,1-Dichloroethene ND 0.0019 EPA 8260C 11-2-18 11-2-18 Acetone ND 0.019 EPA 8260C 11-2-18 11-2-18 Iodomethane ND 0.0095 EPA 8260C 11-2-18 11-2-18 Carbon Disulfide ND 0.0019 EPA 8260C 11-2-18 11-2-18 Methylene Chloride ND 0.0095 EPA 8260C 11-2-18 11-2-18 (trans) 1,2-Dichloroethene ND 0.0019 EPA 8260C 11-2-18 11-2-18 Methyl t-Butyl Ether ND 0.0019 EPA 8260C 11-2-18 11-2-18 1,1-Dichloroethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Vinyl Acetate ND 0.0095 EPA 8260C 11-2-18 11-2-18 2,2-Dichloropropane ND 0.0019 EPA 8260C 11-2-18 11-2-18 (cis) 1,2-Dichloroethene ND 0.0019 EPA 8260C 11-2-18 11-2-18 2-Butanone ND 0.0095 EPA 8260C 11-2-18 11-2-18 Bromochloromethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Chloroform ND 0.0019 EPA 8260C 11-2-18 11-2-18 1,1,1-Trichloroethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Carbon Tetrachloride ND 0.0019 EPA 8260C 11-2-18 11-2-18 1,1-Dichloropropene ND 0.0019 EPA 8260C 11-2-18 11-2-18 Benzene ND 0.0019 EPA 8260C 11-2-18 11-2-18 1,2-Dichloroethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Trichloroethene ND 0.0019 EPA 8260C 11-2-18 11-2-18 1,2-Dichloropropane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Dibromomethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Bromodichloromethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 2-Chloroethyl Vinyl Ether ND 0.012 EPA 8260C 11-2-18 11-2-18 (cis) 1,3-Dichloropropene ND 0.0019 EPA 8260C 11-2-18 11-2-18 Methyl Isobutyl Ketone ND 0.0095 EPA 8260C 11-2-18 11-2-18 Toluene ND 0.0095 EPA 8260C 11-2-18 11-2-18 (trans) 1,3-Dichloropropene ND 0.0019 EPA 8260C 11-2-18 11-2-18

Date of Report: November 7, 2018 Samples Submitted: October 30, 2018

Date Date Analyte Result PQL Method Prepared Analyzed Flags

Client ID: GEI-2-5.0 Laboratory ID: 10-377-01 1,1,2-Trichloroethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Tetrachloroethene ND 0.0019 EPA 8260C 11-2-18 11-2-18 1,3-Dichloropropane ND 0.0019 EPA 8260C 11-2-18 11-2-18 2-Hexanone ND 0.0095 EPA 8260C 11-2-18 11-2-18 Dibromochloromethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 1,2-Dibromoethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Chlorobenzene ND 0.0019 EPA 8260C 11-2-18 11-2-18 1,1,1,2-Tetrachloroethane ND 0.0019 EPA 8260C 11-2-18 11-2-18 Ethylbenzene ND 0.0019 EPA 8260C 11-2-18 11-2-18…