NAVFAC Cutler AST Replacement Env Investigation Ltr_11.8.2023.pdf

westonandsampson.com

100 International Drive, Suite 152, Portsmouth, NH 03801

Tel: 603.431.3937

8 November 2023

Mr. Casey Halliday

Mechanical Engineer

NAVFAC Mid-Atlantic

PWD Maine, Building 59

Portsmouth, Naval Shipyard

Kittery, Maine 03904

Re: Design Phase Environmental Investigation

FY24 Special Project – Replace Mission Essential Backup Fuel Tanks Project

Cutler, Maine

N40085-21-D-0005 | Task Order N40085-23-F-5048

Dear Mr. Halliday:

Weston & Sampson Engineers, Inc. (Weston & Sampson) has prepared this environmental investigation report for the above-referenced project (the Project). The report provides the results of the design-phase environmental investigation performed in October 2023 at the Naval Computer and Telecommunications Area, Master Station

Atlantic Detachment (NCTAMS LANT Det) in Cutler, Maine. The purpose of the investigation was to assess subsurface conditions and the potential to encounter contaminated materials during the replacement of existing aboveground storage tanks (ASTs) at the facility’s oil storage terminal (tank farm) and power plant.

1.0 BACKGROUND

The NCTAMS LANT Det is a federal facility located on the Cutler Peninsula in the Gulf of Maine. The Project Area includes a portion of the facility located on the west-central side of the peninsula, adjacent to Machias Bay. The area includes a tank farm that contains two (2) 315,000-gallon and one (1) 215,000-gallon ASTs, a fire protection

(B123) and fuel control building (B124), fuel off-loading area, and associated aboveground fuel transfer piping and equipment. A power plant (B103), four (4) approximately 15,000-gallon transient ASTs, and a saltwater holding tank are located north of the tank farm. Numerous subsurface utilities and a grounding grid are present in the area, as is a utility tunnel between the fuel control building and power plant.

According to the Spill Prevention Control and Countermeasure (SPCC) plan, the ASTs located in the Project Area are field-erected single-wall steel tanks used for storing diesel fuel. The installation dates for these tanks are unknown. As depicted in Figure 1, the ASTs are situated within secondary containment areas comprised of a gravel berm and a synthetic liner. Catch basins are responsible for draining stormwater from the containment through on-site oil-water separators.

1.1 Project Description

We understand that the Project will involve replacing the existing single-wall fuel storage tanks in the tank farm and transient tank area at the power plant with new double-walled tanks. The Project's design is being undertaken by the Naval Facilities Engineering System Command (NAVFAC). We understand that two design alternatives are currently under consideration. One alternative suggests reusing the existing foundations in the tank farm for the replacement tanks, while the second alternative entails constructing a new foundation for a replacement tank in current transient tank location.

2.0 INVESTIGATION OBJECTIVES & APPROACH

Based on our understanding of the Project, Weston & Sampson conducted a design-phase environmental investigation with the primary objective of assessing subsurface conditions for potential petroleum-related impacts that would require off-site transportation and disposal during the AST replacement. The investigation was carried out according to the Site Investigation Plan that was provided by NAVFAC on 28 August 2023. This plan included advancing geotechnical soil borings to evaluate subsurface conditions for potential foundations to be constructed near the transient tank area and environmental “soft” borings to assess the shallow cover soils inside the existing

AST containment areas The geotechnical and environmental testing was conducted currently. Environmental findings are summarized below. Geotechnical results are provided in the geotechnical data report.

2.0 SUMMARY OF PREVIOUS INVESTIGATIONS

Weston & Sampson reviewed existing information to assess existing conditions and previous environmental response actions in the Project Area. The review considered government provided information and publicly available files from the Maine Department of Environmental Protection (MEDEP) . References are provided in

Attachment A. The review findings include the following:

• Environmental site investigations were conducted in the early 1990s to evaluate areas of concern (AOC) associated with the transient tanks at the power plant (AOC-5) and tank farm (AOC-6). These investigations included sampling and analysis of soil and groundwater downgradient the transient tanks and soil, sediment, groundwater, and surface water at upgradient and downgradient locations around the tank farm.

• The historic environmental site investigation results revealed minor petroleum-related impacts in the vicinity of the tank farm and transient tanks. Petroleum impacts included low concentrations of petroleum hydrocarbons in the soil and petroleum-related volatile organic compounds (VOCs) in the groundwater.

Testing near the tank farm also detected several sediment samples from a nearby drainage ditch containing low petroleum hydrocarbon concentrations.

• There have been several documented fuel spills in transient tank area and tank farm. Diesel spills in the transient tank area occurred in 1992, 1999, and 2000, while a spill in the tank farm reportedly occurred in

1992. Previous reports indicate these spills were largely contained by the secondary containment systems and cleaned up according to MEDEP requirements.

• Corrective actions to address secondary containment systems in the tank farm and transient tank areas were conducted in 1995. The corrective actions reportedly included replacing an existing polyethylene liner, with a composite liner system consisting of a polyethylene drainage net, unspecified geomembrane, and geosynthetic clay liner (GCL). According to the corrective action design drawings for the tank farm, the liner was installed below 12-inches of sand and gravel cover and was extended up the in-board slope of the berm surrounding the ASTs. Copies of the design plans are provided in Attachment B.

• During the corrective action in 1995, petroleum impacted soil was reportedly identified during liner repairs along the berm in the transient tank area. According to previous reports, response actions included removing the petroleum impacted soil, which were relocated to another portion of the facility (Archery

Range and Sludge Spreading Area) where it was subsequently land-spread and treated.

In addition to the historical investigations mentioned above, we are aware that the tank farm is part of the current assessment of base-wide Per- and Polyfluoralkyl Substances (PFAS) impacts. Previous testing conducted at the tank farm revealed the presence of PFAS in both soil and groundwater. It is our understanding that the PFAS source may be linked to former fire protection systems, and additional testing is planned to further define the nature and extent of the contamination.

3.0 ENVIRONMENTAL INVESTIGATION

Based on our environmental records review, Weston & Sampson conducted a subsurface environmental investigation between 15 September 2023 and 13 October 2023. The investigation activities included advancing soil borings and targeted soil sampling and analysis. The soil boring locations are shown in Figure 1.

1 Publicly available information from MEDEP (https://www.maine.gov/dep/maps-data/data.html#doc)

3.1 Site Inspection

On 15 September 2023, Weston & Sampson conducted a site visit to pre-mark the proposed soil borings. During the visit, Weston & Sampson inspected the ASTs containment areas for visual or olfactory evidence of historic fuel spills. No readily apparent evidence was encountered, except for a small area of stained soil near one of the transient ASTs. This area was preferentially selected for soil sampling during the investigation.

3.2 Soil Boring Advancement

Between 11 October 2023 and 13 October 2023, New England

Boring Contractors, Inc. (NEB) advanced three (3) geotechnical soil borings and eight (8) environmental “soft” borings at the Site.

The geotechnical soil borings (SB-1 through SB-3) were completed to depths between 14.8 and 19 feet below ground surface (ft bgs) using a hollow stem auger (HSA) drill rig after pre-clearing the top five (5) feet by vacuum excavation. Environmental soft borings were hand dug and vacuum excavated to depth of the liner in each containment area. Two environmental soft borings were completed for the transient tanks (EV-TTA-1 and EV-TTA-2) and six (6) were conducted in the tank farm (EV-BTA-1 through EV-BTA-

6).

The geotechnical and environmental borings were overseen by a Weston & Sampson engineer who logged soil samples at each location. Soil samples from the geotechnical borings were collected using 2-foot split spoons at

2-to-5-foot intervals . Soil samples from the environmental borings were collected using a hand auger continuously from ground surface to depth of the liner. The liner depth by location is provided below.

LOCATION PROJECT AREA

APPROXIMATE LINER DEPTH

(FT. BGS)

EV-TTA-1

Transient Tanks

1.5

EV-TTA-2 0.6

EV-BTA-1

Tank Farm – West Containment Area

1.4

EV-BTA-2 1.2

EV-BTA-3

Tank Farm – North Containment Area

1.1

EV-BTA-4 1.3

EV-BTA-5

Tank Farm – South Containment Area

1.3

EV-BTA-6 1.3

Soil samples at each geotechnical and environmental location were evaluated for visual and olfactory contamination. Weston & Sampson also performed jar headspace field screening for VOCs using a photoionization detector (PID) with a 10.6 eV lamp. Soil observations and PID screening results are provided on the boring logs in Attachment C.

3.3 Soil Sampling & Analysis

Weston & Sampson collected select soil samples for laboratory analysis based field observations and PID screening results. Samples were collected from each environmental boring location above the underling liner. One geotechnical boring, SB-1, was also sampled based on elevated PID screening results and presence of petroleum odors. The samples were analyzed for the following:

• Extractable Petroleum Hydrocarbons (EPH) with target Polycyclic Aromatic Hydrocarbons (PAHs).

• Volatile Petroleum Hydrocarbons (VPH) with target Volatile Organic Compounds (VOCs).

In addition to sampling for petroleum related impacts, Weston & Sampson also collected composite soil samples from the transient tank area (EV-TTA-COMP) and tank farm (EV-BTA-COMP) for preliminary disposal

Stained Soil at Transient Tanks characterization analysis. The composite sample were collected from the transient tank area and tank farm by combining the full depth of soil at each environmental boring for each area. The disposal characterization laboratory analysis included:

• Toxicity Characteristic Leaching Procedure (TCLP) RCRA-8 Metals,

• TCLP VOCs,

• TCLP Semi-Volatile Organic Compounds (SVOCs),

• TCLP Herbicides and Pesticides,

• Total Polychlorinated Biphenyls (PCBs),

• Total Petroleum Hydrocarbons (TPH), and

• Hazardous characteristics (corrosivity, reactivity, and flashpoint).

Sampling depths are summarized in Table 1. Samples for laboratory analysis were submitted to ESS Laboratory in Cranston, Rhode Island. Laboratory data reports are provided in Attachment D.

4.0 INVESTIGATION RESULTS

4.1 Environmental Soft Borings

Subsurface conditions inside the containment areas generally consisted of well graded sand with silt and gravel.

As noted above, Weston & Sampson encountered the liner at various depths ranging from 0.6 ft bgs to 1.5 ft bgs in the transient tank area and approximately 1.1 ft bgs and 1.4 ft bgs in the tank farm. No visual or olfactory contamination was encountered. The maximum PID screening result was 2.5 parts per million (ppm) at EV-TTA-1.

As shown in Table 1, soil sampling results for shallow soil in the containment area contained low concentrations of EPH in both transient tanks samples and one tank farm sample (EV-BTA-1). Where detected, the EPH concentrations were below MEDEP Remedial Action Guidelines (RAGs).

4.2 Geotechnical Borings

A detailed summary of geotechnical subsurface conditions is provided in Attachment C and the geotechnical data report.

No evidence of contamination or elevated PID screening results were encountered at SB-2 and SB-3. A petroleum odor was observed at SB-1 between approximately 7 and 11 ft bgs. Subsequent PID screening from this interval had VOC detections between 170 ppm to 185 ppm. Based on these results, a soil sample was collected from the depth interval exhibiting the highest PID screening result and was submitted for EPH and VPH analysis. As shown in Table 1, the results identified low concentrations of EPH and VPH fractions, select PAHs, and VOCs. Where detected, the concentrations were below MEDEP’s residential, commercial worker, and construction worker RAGs.

The concentration of C9-C10 aromatic hydrocarbons, naphthalene, and ethylbenzene exceeded the MEDEP RAG for leaching to groundwater.

4.3 Disposal Characterization

The composite disposal characterization samples are summarized in Table 1. Except for TPH in the transient tank composite sample (EV-TTA-COMP) and low TCLP barium concentrations in the transient and tank farm (EV-BTA-

COMP) samples, disposal parameters concentrations were below laboratory reporting limits. The TCLP barium results (0.092 mg/L and 0.097 mg/L) were below their RCRA toxicity characteristic threshold concentrations.

5.0 CONCLUSIONS

Weston & Sampson completed an environmental investigation to characterize soil within the Project Area. Based on the results, Weston & Sampson concludes the following:

• Presence of the liner for secondary containment around the existing ASTs was confirmed during the investigation. The liner was generally encountered between 0.6 to 1.5 ft bgs. The depth is consistent with plans and previous studies within the Project Area.

• Cover soil located above the liner in the containment areas around the ASTs does not appear to have been impacted by a historic petroleum release. Conversely, some residual petroleum contamination is present in soil outside the containment area near the transient tanks. Where detected, the contaminant concentrations are less than MEDEP RAGs, except for one VPH fraction and select VOCs that exceeded

MEDEP’s leaching to groundwater RAG.

• The Project is expected to require handling contaminated soil containing low petroleum, PAH, and VOC concentrations during future excavation activities outside transient tank area. Proper management of these soils is recommended. Based on the preliminary disposal characterization data, surplus excavated soil generated from this appear to be acceptable for off-site transportation and disposal at a non-hazardous landfill.

Given the environmental investigation findings, no additional soil testing is recommended. Depending on the

Project design, additional disposal characterization testing may be required to facilitate off-site transportation and disposal of surplus excavated materials. Testing may also be required during AST decommissioning/removal to meet MEDEP requirements. Lastly, we recommend the Project design consider any forthcoming results from PFAS soil and groundwater investigations at the site. Although not evaluated as part of our recent investigation, the presence of PFAS in soil and/or groundwater may affect the off-site management alternatives and the cost for handling of excavated materials during future construction.

If you have any questions or would like to discuss our environmental investigation findings, please contact the undersigned at bridgeot@wseinc.com.

Sincerely, WESTON & SAMPSON ENGINEERS, INC.

Todd M. Bridgeo, PE, LSP

Team Leader

CC:

Bill Harke, NAVFAC

Geoff Brown, NAVFAC

Matt Thyng, NAVFAC

Anthony Naslas, NAVFAC

Dan Fish, NAVFAC

ATTACHMENTS

Figure 1 – Soil Investigation Plan

Table 1 – Soil Sampling Results

Attachment A – References

Attachment B – Corrective Action Design Plans

Attachment C – Soil Boring Logs

Attachment D – Laboratory Data Reports

Attachment E – Limitations

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COPYRIGHT © 2023 WESTON & SAMPSON, INC.

Project:

www.westonandsampson.com

Revisions:

No. Date Description

Issued For:

Drawing Title:

Sheet Number:

Scale:

W&S File No.:

W&S Project No.:

Approved By:

Date:

Reviewed By:

Drawn By:

ENG23-0805

11/2/2023

Weston & Sampson Engineers, Inc.

PORTSMOUTH, NH

978.532.1900 800.SAMPSON

TB

TB

ACS

1"=60'

NAVAL FACILITIES

ENGINEERING SYSTEMS

COMMAND ~ MID-ATLANTIC

NAVAL MISSION ESSENTIAL

BACKUP FUEL TANKS

SOIL INVESTIGATION

PLAN

NOT FOR CONSTRUCTION

AutoCAD SHX Text

FUEL STORAGE TANK

AutoCAD SHX Text

FUEL STORAGE TANK

AutoCAD SHX Text

FUEL STORAGE TANK

AutoCAD SHX Text

15 MPH

AutoCAD SHX Text

VGC

AutoCAD SHX Text (A)

AutoCAD SHX Text (B)

AutoCAD SHX Text (B)

AutoCAD SHX Text (A)

AutoCAD SHX Text (A)

AutoCAD SHX Text (A)

AutoCAD SHX Text

AutoCAD SHX Text

SEPTIC TANK

AutoCAD SHX Text (B)

AutoCAD SHX Text

EOI

AutoCAD SHX Text

B103 POWER PLANT

AutoCAD SHX Text

SALT WATER HOLDING TANK

AutoCAD SHX Text

TRANSIENT TANKS

AutoCAD SHX Text N

AutoCAD SHX Text

SCALE: 1"=60'

AutoCAD SHX Text

AutoCAD SHX Text

AutoCAD SHX Text

AutoCAD SHX Text

AutoCAD SHX Text bridgeot Typewritten Text B123 bridgeot Typewritten Text B124

SB-1 EV-TTA-1 DUP-1 EV-TTA-2 EV-TTA-COMP EV-BTA-1 EV-BTA-2 EV-BTA-3 EV-BTA-4 EV-BTA-5 EV-BTA-6 EV-BTA-COMP PARAMETERS UNITS 7.1-8.6 FT 0-18 in [EV-TTA-1 ] 0-7 in 0-18 in 0-17 in 0-14 in 0-13 in 0-16 in 0-16 in 0-15 in 0-17 in

LEACHING TO

GROUNDWATER

RESIDENTIAL

COMMERCIAL

WORKER

CONSTRUCTION

WORKER

10/13/23 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/12/2023 10/12/2023 10/13/2023

Extractable Petroleum Hydrocarbons (EPH) C9-C18 Aliphatics mg/kg dry 26,000 2,500 14,000 4,800 - 173 108 114 <16.3 - <16.4 <16.2 <15.5 <17 <17.4 <17 - C19-C36 Aliphatics mg/kg dry - 100,000 100,000 100,000 - 37.5 96 92.7 48.7 - 17 <16.2 <15.5 <17 <17.4 <17 - C11-C22 Aromatics mg/kg dry 340 2,600 33,000 74,000 - 102 21.9 24.7 <16.3 - <16.4 <16.2 <15.5 <17 <17.4 <17 -

2-Methylnaphthalene mg/kg dry 10 330 4,100 960 2.08 <0.22 <0.22 <0.22 - <0.22 <0.22 <0.21 <0.23 <0.23 <0.23 - Acenaphthene mg/kg dry 300 4,900 62,000 48,000 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Acenaphthylene mg/kg dry 290 4,900 45,000 48,000 - <0.26 <0.22 <0.22 <0.22 - <0.22 <0.22 <0.21 <0.23 <0.23 <0.23 - Anthracene mg/kg dry 3,200 25,000 100,000 100,000 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Benzo(a)anthracene mg/kg dry 5.8 16 280 1,700 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Benzo(a)pyrene mg/kg dry 16.0 1.6 29.0 9.9 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Benzo(b)fluoranthene mg/kg dry 170 16 290 1,700 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Benzo(g,h,i)perylene mg/kg dry - 2,500 23,000 72,000 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Benzo(k)fluoranthene mg/kg dry 1,600 160 2,900 17,000 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Chrysene mg/kg dry 5,000 1,600 29,000 100,000 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Dibenzo(a,h)Anthracene mg/kg dry 53.0 1.6 29.0 170 - <0.26 <0.22 <0.22 <0.22 - <0.22 <0.22 <0.21 <0.23 <0.23 <0.23 - Fluoranthene mg/kg dry 4,900 3,300 41,000 24,000 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Fluorene mg/kg dry 300 3,300 41,000 96,000 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Indeno(1,2,3-cd)Pyrene mg/kg dry 540 16 290 1,700 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Naphthalene mg/kg dry 0.21 29 120 130 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Phenanthrene mg/kg dry 320 2,500 23,000 72,000 - 0.64 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 - Pyrene mg/kg dry 720 2,500 31,000 72,000 - <0.53 <0.44 <0.44 <0.44 - <0.44 <0.43 <0.41 <0.45 <0.46 <0.45 -

Volatile Petroleum Hydrocarbon (VPH) C5-C8 Aliphatics mg/kg dry 92 1,700 11,000 430 - 24.6 <12.3 <12.2 <12.5 - <12.1 <11.9 <12.1 <12.7 <14.9 <14.4 - C9-C12 Aliphatics mg/kg dry 5,800 2,500 14,000 2,300 - 132 <24.5 <24.2 <24.9 - <24.1 <23.7 <24 <25.2 <29.7 <28.6 - C9-C10 Aromatics mg/kg dry 15 660 3,500 2,600 - 175 <11.8 <11.6 <12 - <11.6 <11.4 <11.6 <12.1 <14.3 <13.7 -

Benzene mg/kg dry 0.13 17 75 240 - <0.33 <0.24 <0.23 <0.24 - <0.23 <0.23 <0.23 <0.24 <0.29 <0.27 - Ethylbenzene mg/kg dry 0.92 86 380 470 - 1.19 <0.24 <0.23 <0.24 - <0.23 <0.23 <0.23 <0.24 <0.29 <0.27 - Methyl tert-Butyl Ether mg/kg dry 1.8 690 3,000 8,200 - <0.08 <0.06 <0.06 <0.06 - <0.06 <0.06 <0.06 <0.06 <0.07 <0.07 - Naphthalene mg/kg dry 0.21 29 120 130 - 8.95 <0.24 <0.23 <0.24 - <0.23 <0.23 <0.23 <0.24 <0.29 <0.27 - Toluene mg/kg dry 42 750 810 820 - <0.33 <0.24 <0.23 <0.24 - <0.23 <0.23 <0.23 <0.24 <0.29 <0.27 - Xylene, Total mg/kg dry 11 260 260 260 - 3.73 <0.24 <0.23 <0.24 - <0.23 <0.23 <0.23 <0.24 <0.29 <0.27 -

1311 TCLP Metals Arsenic mg/L - - - - 5.0 - - - - <0.05 - - - - - - <0.05 Barium mg/L - - - - 100.0 - - - - 0.097 - - - - - - 0.092 Cadmium mg/L - - - - 1.0 - - - - <0.01 - - - - - - <0.01 Chromium mg/L - - - - 5.0 - - - - <0.02 - - - - - - <0.02 Lead mg/L - - - - 5.0 - - - - <0.05 - - - - - - <0.05 Mercury mg/L - - - - 0.2 - - - - <0.0005 - - - - - - <0.0005 Selenium mg/L - - - - 1.0 - - - - <0.05 - - - - - - <0.05 Silver mg/L - - - - 5.0 - - - - <0.01 - - - - - - <0.01

8100M Total Petroleum Hydrocarbons Total Petroleum Hydrocarbons (C9-C36) mg/kg dry - - - - - - - - 49.3 - - - - - - <11.1

1311/8081B Pesticide TCLP Compounds Chlordane (Total) mg/L - - - - 0.03 - - - - <0.005 - - - - - - <0.005 Endrin mg/L - - - - 0.02 - - - - <0.0005 - - - - - - <0.0005 gamma-BHC (Lindane) mg/L - - - - 0.4 - - - - <0.0005 - - - - - - <0.0005 Heptachlor mg/L - - - - 0.008 - - - - <0.0005 - - - - - - <0.0005 Heptachlor Epoxide mg/L - - - - 0.008 - - - - <0.0005 - - - - - - <0.0005 Methoxychlor mg/L - - - - 10.0 - - - - <0.0005 - - - - - - <0.0005 Toxaphene mg/L - - - - 0.5 - - - - <0.013 - - - - - - <0.013

MEDEP REMEDIAL

ACTION GUIDELINES (RAGs)

TABLE 1

SOIL SAMPLE ANALYSIS

FUEL STORAGE TANK REPLACEMENT PROJECT

NCTAMS LANT DET, CUTLER, MAINE

TCLP TOXICITY

CHARACTERISTIC

THRESHOLD

CONCENTRATION

SAMPLE LOCATIONS

11/8/2023 1 OF 2 WESTON SAMPSON

SB-1 EV-TTA-1 DUP-1 EV-TTA-2 EV-TTA-COMP EV-BTA-1 EV-BTA-2 EV-BTA-3 EV-BTA-4 EV-BTA-5 EV-BTA-6 EV-BTA-COMP PARAMETERS UNITS 7.1-8.6 FT 0-18 in [EV-TTA-1 ] 0-7 in 0-18 in 0-17 in 0-14 in 0-13 in 0-16 in 0-16 in 0-15 in 0-17 in

LEACHING TO

GROUNDWATER

RESIDENTIAL

COMMERCIAL

WORKER

CONSTRUCTION

WORKER

10/13/23 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/11/2023 10/12/2023 10/12/2023 10/13/2023

MEDEP REMEDIAL

ACTION GUIDELINES (RAGs)

TABLE 1

SOIL SAMPLE ANALYSIS

FUEL STORAGE TANK REPLACEMENT PROJECT

NCTAMS LANT DET, CUTLER, MAINE

TCLP TOXICITY

CHARACTERISTIC

THRESHOLD

CONCENTRATION

SAMPLE LOCATIONS

1311/8151A TCLP Herbicide Compounds 2,4,5-TP (Silvex) mg/L - - - - 1.0 - - - - <0.002 - - - - - - <0.002 2,4-D mg/L - - - - 10.0 - - - - <0.009 - - - - - - <0.009

1311/8260B Volatile TCLP Compounds 1,1-Dichloroethene mg/L - - - - 0.7 - - - - <0.1 - - - - - - <0.1 1,2-Dichloroethane mg/L - - - - 0.5 - - - - <0.1 - - - - - - <0.1 1,4-Dichlorobenzene mg/L - - - - 7.5 - - - - <0.1 - - - - - - <0.1 2-Butanone mg/L - - - - 200.0 - - - - <2.5 - - - - - - <2.5 Benzene mg/L - - - - 0.5 - - - - <0.1 - - - - - - <0.1 Carbon Tetrachloride mg/L - - - - 0.5 - - - - <0.1 - - - - - - <0.1 Chlorobenzene mg/L - - - - 100.0 - - - - <0.1 - - - - - - <0.1 Chloroform mg/L - - - - 6.0 - - - - <0.1 - - - - - - <0.1 Tetrachloroethene mg/L - - - - 0.7 - - - - <0.1 - - - - - - <0.1 Trichloroethene mg/L - - - - 0.5 - - - - <0.1 - - - - - - <0.1 Vinyl Chloride mg/L - - - - 0.2 - - - - <0.1 - - - - - - <0.1

1311/8270D Semi Volatile TCLP Compounds 2,4,5-Trichlorophenol mg/L - - - - 400.0 - - - - <0.05 - - - - - - <0.05 2,4,6-Trichlorophenol mg/L - - - - 2.0 - - - - <0.05 - - - - - - <0.05 2,4-Dinitrotoluene mg/L - - - - 0.13 - - - - <0.05 - - - - - - <0.05 2-Methylphenol mg/L - - - - 200.0 - - - - <0.05 - - - - - - <0.05 3+4-Methylphenol mg/L - - - - 200.0 - - - - <0.1 - - - - - - <0.1 Hexachlorobenzene mg/L - - - - 0.13 - - - - <0.05 - - - - - - <0.05 Hexachlorobutadiene mg/L - - - - 0.5 - - - - <0.05 - - - - - - <0.05 Hexachloroethane mg/L - - - - 3.0 - - - - <0.02 - - - - - - <0.02 Nitrobenzene mg/L - - - - 2.0 - - - - <0.05 - - - - - - <0.05 Pentachlorophenol mg/L - - - - 100.0 - - - - <0.25 - - - - - - <0.25 Pyridine mg/L - - - - 5.0 - - - - <0.5 - - - - - - <0.5

8082A Polychlorinated Biphenyls (PCB) Aroclor 1016 mg/kg dry 7.4 5.6 70 16 - - - - - <0.03 - - - - - - <0.03 Aroclor 1221 mg/kg dry - - - - - - - - - <0.03 - - - - - - <0.03 Aroclor 1232 mg/kg dry - - - - - - - - - <0.03 - - - - - - <0.03 Aroclor 1242 mg/kg dry - - - - - - - - - <0.03 - - - - - - <0.03 Aroclor 1248 mg/kg dry - - - - - - - - - <0.03 - - - - - - <0.03 Aroclor 1254 mg/kg dry - - - - - - - - - <0.03 - - - - - - <0.03 Aroclor 1260 mg/kg dry - - - - - - - - - <0.03 - - - - - - <0.03 Aroclor 1262 mg/kg dry - - - - - - - - - <0.03 - - - - - - <0.03 Aroclor 1268 mg/kg dry - - - - - - - - - <0.03 - - - - - - <0.03 Total PCB mg/kg dry 3.8 3.1 13 74 - - - - - <0.03 - - - - - - <0.03

Classical Chemistry Corrosivity (pH) S.U. - - - - - - - - - 6.68 - - - - - - 7.69 Flashpoint °F - - - - - - - - - >200 - - - - - - >200 Reactive Cyanide mg/kg - - - - - - - - - <2 - - - - - - <2 Reactive Sulfide mg/kg - - - - - - - - - <2 - - - - - - <2

QC: ACH 11/3/2023

Notes "-" = Not tested or no standard "<" = Parameter not detected above the laboratory reporting limits indicated "in" = Inches below ground surface "FT" = Feet below ground surface

Bold values indicate paramater detected above the laboratory reporting limit Highlighted values exceed one or more MEDEP RAG

11/8/2023 2 OF 2 WESTON SAMPSON

ATTACHMENT A

REFERENCES

ATTACHMENT B

REFERENCES

Design Phase Environmental Investigation

FY24 Special Project – Replace Mission Essential Backup Fuel Tanks Project

Cutler, Maine

N40085-21-D-0005 | Task Order N40085-23-F-5048

1. Spill Prevention, Control, and Countermeasures Plan, Naval Computer and Telecommunications

Area Master Station Atlantic Detachment Cutler, Cutler, Maine (May 2017)

2. Hydrogeological Investigation Final Report, Naval Communications Unit, Culter, Maine (December

1992)

3. Hydrogeological Investigation Initial Results, Naval Communications Unti, Cutler, Maine (January

1992)

4. Preliminary Site Assessment Report for Naval Computer and Telecommunications Area, Master

Station Atlantic Detachment, Cutler, Maine (March 2007)

5. Final Site Management Plan, Naval Support Activity Cutler, Cutler, Maine (February 2021)

6. Oil Spill Report: Naval Computer and Telecommunications Area Master Station Atlantic Detachment, Cutler, Maine (December 2000)

7. Revised Final Per- and Polyfluoroalkyl Substances Data Gap Site Inspection Report: IR Site 1 – Fire

Training Area, AOC 1 – Former Sludge Spreading Area, IR Site 11 (AOC 6) – Tank Farm, Naval

Support Activity (NSA) Cutler, Cutler, Maine (May 2023)

8. Remedial Action Guidelines for Contaminated Sites (RAGs), Maine Department of Environmental

Protection (May 2021): https://www.maine.gov/dep/spills/publications/guidance/rags/Maine-

Remedial-Action-Guidelines-2021-05-01.pdf

9. Existing Conditions and Final Construction Plan, Tank Farm Liner System, 1993-1995

10. Existing Conditions and Reference Drawings, FY 24 Special Project P-1694050, Replace Mission

Essential Backup Fuel Tanks, Statement of A-E Services (February 2023)

ATTACHMENT A

https://www.maine.gov/dep/spills/publications/guidance/rags/Maine-Remedial-Action-Guidelines-2021-05-01.pdf https://www.maine.gov/dep/spills/publications/guidance/rags/Maine-Remedial-Action-Guidelines-2021-05-01.pdf

ATTACHMENT B

CORRECTIVE ACTION DESIGN PLANS

Attachment D Existing Conditions and Final Construction Plan, Tank Farm Liner

System, 1993-1995

Enclosure 3

pg. 2 of 6

ATTACHMENT C

SOIL BORING LOGS

D

EP

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

G

G

G

SA

M

PL

E

ID

N

U M

BE

R

A N

D R

EC

O

VE

R

Y R

AT

IO

[I N

./I N

G-1

G-2

G-3

G-4 S-1

10/24

S-2 8/24

S-3 4/24

RC-1

56/60

SP

T

BL

O

W S

/ 6

IN

O

R

C O

R E

R

AT

E / 1

IN

M

IN

03:04

02:27

02:04

02:45

02:07

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.0

0.1

0.2

0.1

0.4

0.7

185.4

170.0

GEOTECHNICAL

TEST DATA

RQD =

23%

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Grass area.

Topsoil- 4 inches thick.

Silty sand with gravel (SM) - Brown;

moist; some fine to coarse SAND, some fine to coarse gravel, some non plastic fines. [FILL]

Gravelly lean clay (CL) - Brown; moist;

mostly low plasticity FINES, some fine to coarse gravel, few fine to coarse sand;

trace organics (roots). [FILL]

Clayey sand with gravel (SC) - Medium dense; brown to gray; moist to wet; some fine to coarse SAND, some low plasticity fines, little fine to coarse gravel. [FILL]

Poorly graded sand with silt (SP-SM) - Medium dense; gray to brown; wet; mostly medium to coarse SAND, few fine to coarse gravel, few non plastic fines. [FILL] Silty sand (SM) - Mostly medium to coarse SAND, some non plastic fines, trace fine gravel; petroleum-like odor;

frequent debris (woody debris). [FILL] Silty sand (SM) - Dense; gray; mostly fine to medium SAND, some non plastic fines, few fine gravel; petroleum-like odor.

Dark gray, moderately weathered, severely fractured DIABASE with slight silt infill and moderately dipping joints.

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

Depth to groundwater could not be evaluated due to use of rotary wash drilling method.

[0.0 - 4.6] Boring vacuum excavated.

Occasional cobbles/boulders up to 18 inches in diameter removed from excavation. Vacuum excavator refusal on cobbles/boulders at 4.6 ft.

[4.2] Possible perched groundwater.

[12.7 - 14.0] Roller bit grinding into rock.

[14.0] 3" ID casing telescoped to bottom of boring for rock coring.

Exploration ended at 19.0 ft.

Fuel Storage Tank Replacement Project NCTAMS LANT Det, Cutler, ME BORING ID: SB-1

WSE Project: ENG23-0805 Page 1 of 1

CONTRACTOR:

FOREMAN:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

SPT HAMMER:

NE Boring Contractors, Inc.

B. Enos S. Wuebbolt, EIT H. Flores, PE Vacuum to ATV Mounted Drill Rig Automatic (140-lb.)

BORING LOCATION:

ADVANCE METHOD:

AUGER DIAMETER:

SUPPORT CASING:

CORING METHOD:

BACKFILL MATERIAL:

See Attached Figure Vacuum to Cased Rotary Wash N/A Driven Flush-Joint (4" ID to 3" ID) NX Conventional Drill Cuttings

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 12, 2023 October 13, 2023

28.0 ± (NAVD88)

19.0 ft.

N:357869.0807 / E:1298045.4842 NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

N-Value, Raw (bpf) Organic Content (%)

10 20 30 40

Moisture Content (%) Plastic Limit, PL (%) Liquid Limit, LL (%)

25 50 75 100

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

G

G

G

SA

M

PL

E

ID

N

U M

BE

R

A N

D R

EC

O

VE

R

Y R

AT

IO

[I N

./I N

G-1

G-2

G-3

G-4

S-1 16/24

S-2 17/24

S-3 5/11

S-4 9/24

S-5 15/19

SP

T

BL

O

W S

/ 6

IN

O

R

C O

R E

R

AT

E / 1

IN

M

IN

54/5

50/1

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.0

0.0

0.0

0.2

0.3

0.3

0.2

0.1

0.3

0.2

GEOTECHNICAL

TEST DATA

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Grass area.

Topsoil- 6 inches thick.

Silty sand with gravel (SM) - Brown;

moist; mostly fine to coarse SAND, some fine to coarse gravel, little non plastic fines;

trace organics (roots). [FILL] Silty sand with gravel (SM) - Brown;

moist; mostly fine to coarse SAND, some non plastic fines, little fine to coarse gravel;

trace organics (roots). [FILL] Sandy lean clay with gravel (CL) - Brown; moist; mostly low plasticity FINES, some fine to medium sand, little fine gravel; trace organics (plant fibers). [FILL] Organic soil with sand (OL) - Dark brown; moist to wet; mostly organic low plasticity FINES, little fine sand; organic odor; occasional organics (plant fibers).

Silty sand with gravel (SM) - Medium dense to very dense; gray; moist; some fine to medium SAND, some fine to coarse gravel, little non plastic fines.

Clayey sand (SC) - Brown; moist; mostly fine to medium SAND, some low plasticity fines, few fine to coarse gravel.

[9.9] Rock fragment recovered in split-spoon tip Silty sand with gravel (SM) - Very dense;

light brown; moist to wet; mostly fine to medium SAND, some non plastic fines, little fine to coarse gravel.

Sandy lean clay (CL) - Hard; brown; wet;

mostly low plasticity FINES, some fine to medium sand, few fine to coarse gravel.

Possible rock based on split-spoon refusal and auger grinding

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

[0.0 - 5.0] Boring vacuum excavated.

Occasional cobbles/boulders up to 18 inches in diameter and trace debris (metal, plastic) removed from excavation.

[4.2] Possible perched groundwater level.

[5.0 - 7.0] Auger grinding.

[9.0] Estimated water level at time of drilling based on changes in sample moisture.

[9.5 - 10.4] Auger grinding.

[12.0 - 14.0] Auger grinding.

[15.6 - 16.4] Slow and consistent auger grinding into possible rock.

Auger refusal at 16.6 ft. (exploration ended).

Fuel Storage Tank Replacement Project NCTAMS LANT Det, Cutler, ME BORING ID: SB-2

WSE Project: ENG23-0805 Page 1 of 1

CONTRACTOR:

FOREMAN:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

SPT HAMMER:

NE Boring Contractors, Inc.

B. Enos S. Wuebbolt, EIT H. Flores, PE Vacuum to ATV Mounted Drill Rig Automatic (140-lb.)

BORING LOCATION:

ADVANCE METHOD:

AUGER DIAMETER:

SUPPORT CASING:

CORING METHOD:

BACKFILL MATERIAL:

See Attached Figure Vacuum to Hollow-Stem Auger 2-1/4" ID (Stem), 5-5/8" OD (Flights) N/A N/A Drill Cuttings

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 12, 2023 October 13, 2023

30.0 ± (NAVD88)

16.6 ft. (Refusal) N:357803.9600 / E:1298078.7023 NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

N-Value, Raw (bpf) Organic Content (%)

10 20 30 40

Moisture Content (%) Plastic Limit, PL (%)

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

G

G

G

SA

M

PL

E

ID

N

U M

BE

R

A N

D R

EC

O

VE

R

Y R

AT

IO

[I N

./I N

G-1

G-2

G-3

G-4

S-1 8/24

S-2 20/24

S-3 19/24

S-4 2/2

SP

T

BL

O

W S

/ 6

IN

O

R

C O

R E

R

AT

E / 1

IN

M

IN

50/2

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.0

0.1

0.0

0.2

1.6

0.1

0.4

0.4

GEOTECHNICAL

TEST DATA

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Grass area.

Topsoil- 6 inches thick.

Silty sand with gravel (SM) - Brown;

moist; mostly fine to coarse SAND, some fine to coarse gravel, little non plastic fines;

trace organics (roots). [FILL]

Silty gravel with sand (GM) - Brown;

moist; mostly fine to coarse GRAVEL, some fine to coarse sand, little non plastic fines. [FILL] Sandy lean clay with gravel (CL) - Gray with brown; moist; mostly low plasticity FINES, some fine to medium sand, little fine gravel. [FILL] Organic soil with sand (OL) - Dark brown; moist; mostly organic low plasticity FINES, little fine to medium sand, trace fine gravel.

Sandy lean clay (CL) - Hard; brown;

moist; mostly medium plasticity FINES, some fine to medium sand, trace fine gravel.

Clayey sand with gravel (SC) - Medium dense; brown with gray; wet; mostly fine to medium SAND, some low plasticity fines, little fine to coarse gravel.

Silty sand with gravel (SM) - Some fine to coarse SAND, some fine and coarse gravel, some non plastic fines.

[WEATHERED ROCK]

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

[0.0 - 5.0] Boring vacuum excavated.

Occasional cobbles/boulders up to 18 inches in diameter and trace debris (metal) removed from excavation.

[9.0] Estimated water level at time of drilling based on changes in sample moisture.

[10.0 - 11.0] Auger grinding.

[13.3 - 14.8] Slow and consistent auger grinding into possible rock.

Auger refusal at 14.8 ft. (exploration ended).

Fuel Storage Tank Replacement Project NCTAMS LANT Det, Cutler, ME BORING ID: SB-3

WSE Project: ENG23-0805 Page 1 of 1

CONTRACTOR:

FOREMAN:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

SPT HAMMER:

NE Boring Contractors, Inc.

B. Enos S. Wuebbolt, EIT H. Flores, PE Vacuum to ATV Mounted Drill Rig Automatic (140-lb.)

BORING LOCATION:

ADVANCE METHOD:

AUGER DIAMETER:

SUPPORT CASING:

CORING METHOD:

BACKFILL MATERIAL:

See Attached Figure Vacuum to Hollow-Stem Auger 2-1/4" ID (Stem), 5-5/8" OD (Flights) N/A N/A Drill Cuttings

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 12, 2023 October 13, 2023

29.0 ± (NAVD88)

14.8 ft. (Refusal) N:357830.8279 / E:1298059.2260 NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

N-Value, Raw (bpf) Organic Content (%)

10 20 30 40

Moisture Content (%) Plastic Limit, PL (%)

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

G

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.1

2.5

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Containment area fill.

Well graded sand with silt and gravel (SW-SM) - Brown to gray; moist; mostly fine to coarse SAND, some fine to coarse gravel, few non plastic fines. [FILL]

Well graded sand with gravel (SW) - Brown to gray; moist to wet; mostly fine to coarse SAND, some fine to coarse gravel, trace non plastic fines. [FILL]

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

Possible containment area liner encountered at 1.5 ft

Fuel Storage Tank Replacement Project TEST PIT ID: EV-TTA-1 WSE Project: ENG23-0805 NCTAMS LANT Det, Cutler, ME Page 1 of 1

CONTRACTOR:

OPERATOR:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

BUCKET TYPE:

Weston & Sampson Engineers, Inc.

S. Wuebbolt, EIT S. Wuebbolt, EIT

DRAFT

Hand Shovel/Auger N/A

TEST PIT LOCATION:

PLAN DIMENSIONS:

SEEPAGE REMARKS:

CAVING REMARKS:

BACKFILL MATERIAL:

OTHER COMMENTS:

See Attached Figure Length: 1.0 ft. , Width: 1.0 ft.

Fast Seepage at 1.1 ft.

N/A Excavated Soil

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 11, 2023 October 11, 2023

26.0 ± (NAVD88)

1.5 ft.

N:357828 ± / E:1298087 ± NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

T. Bridgeo

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.2

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Containment area fill.

Well graded sand with gravel (SW) - Brown to gray; moist to wet; mostly fine to coarse SAND, some fine to coarse gravel, trace non plastic fines. [FILL]

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

Possible containment area liner encountered at 0.6 ft

Fuel Storage Tank Replacement Project TEST PIT ID: EV-TTA-2 WSE Project: ENG23-0805 NCTAMS LANT Det, Cutler, ME Page 1 of 1

CONTRACTOR:

OPERATOR:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

BUCKET TYPE:

Weston & Sampson Engineers, Inc.

S. Wuebbolt, EIT S. Wuebbolt, EIT

DRAFT

Hand Shovel/Auger N/A

TEST PIT LOCATION:

PLAN DIMENSIONS:

SEEPAGE REMARKS:

CAVING REMARKS:

BACKFILL MATERIAL:

OTHER COMMENTS:

See Attached Figure Length: 1.0 ft. , Width: 1.0 ft.

Fast Seepage at 0.3 ft.

N/A Excavated Soil

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 11, 2023 October 11, 2023

26.0 ± (NAVD88)

0.6 ft.

N:357868 ± / E:1298091 ± NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

G

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.0

0.1

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Containment area fill.

Silty sand with gravel (SM) - Brown to gray; moist to wet; mostly fine to coarse SAND, some fine to coarse gravel, little non plastic fines. [FILL]

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

Possible containment area liner encountered at 1.4 ft

Fuel Storage Tank Replacement Project TEST PIT ID: EV-BTA-1 WSE Project: ENG23-0805 NCTAMS LANT Det, Cutler, ME Page 1 of 1

CONTRACTOR:

OPERATOR:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

BUCKET TYPE:

Weston & Sampson Engineers, Inc.

S. Wuebbolt, EIT S. Wuebbolt, EIT

DRAFT

Hand Shovel/Auger N/A

TEST PIT LOCATION:

PLAN DIMENSIONS:

SEEPAGE REMARKS:

CAVING REMARKS:

BACKFILL MATERIAL:

OTHER COMMENTS:

See Attached Figure Length: 1.0 ft. , Width: 1.0 ft.

Fast Seepage at 1.0 ft.

N/A Excavated Soil

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 11, 2023 October 11, 2023

26.0 ± (NAVD88)

1.4 ft.

N:357572 ± / E:1298270 ± NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

G

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.2

0.2

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Containment area fill.

Well graded sand with silt and gravel (SW-SM) - Brown to gray; moist to wet;

mostly fine to coarse SAND, some fine to coarse gravel, few non plastic fines. [FILL]

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

Possible containment area liner encountered at 1.2 ft

Fuel Storage Tank Replacement Project TEST PIT ID: EV-BTA-2 WSE Project: ENG23-0805 NCTAMS LANT Det, Cutler, ME Page 1 of 1

CONTRACTOR:

OPERATOR:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

BUCKET TYPE:

Weston & Sampson Engineers, Inc.

S. Wuebbolt, EIT S. Wuebbolt, EIT

DRAFT

Hand Shovel/Auger N/A

TEST PIT LOCATION:

PLAN DIMENSIONS:

SEEPAGE REMARKS:

CAVING REMARKS:

BACKFILL MATERIAL:

OTHER COMMENTS:

See Attached Figure Length: 1.0 ft. , Width: 1.0 ft.

Fast Seepage at 1.0 ft.

N/A Excavated Soil

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 11, 2023 October 11, 2023

26.0 ± (NAVD88)

1.2 ft.

N:357543 ± / E:1298335 ± NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.1

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Containment area fill.

Well graded sand with silt and gravel (SW-SM) - Brown to gray; moist to wet;

mostly fine to coarse SAND, some fine to coarse gravel, few non plastic fines. [FILL]

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

Possible containment area liner encountered at 1.1 ft

Fuel Storage Tank Replacement Project TEST PIT ID: EV-BTA-3 WSE Project: ENG23-0805 NCTAMS LANT Det, Cutler, ME Page 1 of 1

CONTRACTOR:

OPERATOR:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

BUCKET TYPE:

Weston & Sampson Engineers, Inc.

S. Wuebbolt, EIT S. Wuebbolt, EIT

DRAFT

Hand Shovel/Auger N/A

TEST PIT LOCATION:

PLAN DIMENSIONS:

SEEPAGE REMARKS:

CAVING REMARKS:

BACKFILL MATERIAL:

OTHER COMMENTS:

See Attached Figure Length: 1.0 ft. , Width: 1.0 ft.

Fast Seepage at 0.9 ft.

N/A Excavated Soil

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 11, 2023 October 11, 2023

26.0 ± (NAVD88)

1.1 ft.

N:357647 ± / E:1298391 ± NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

G

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.1

0.1

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Containment area fill.

Well graded sand with silt and gravel (SW-SM) - Brown to gray; moist to wet;

mostly fine to coarse SAND, some fine to coarse gravel, few non plastic fines. [FILL]

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

Possible containment area liner encountered at 1.3 ft

Fuel Storage Tank Replacement Project TEST PIT ID: EV-BTA-4 WSE Project: ENG23-0805 NCTAMS LANT Det, Cutler, ME Page 1 of 1

CONTRACTOR:

OPERATOR:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

BUCKET TYPE:

Weston & Sampson Engineers, Inc.

S. Wuebbolt, EIT S. Wuebbolt, EIT

DRAFT

Hand Shovel/Auger N/A

TEST PIT LOCATION:

PLAN DIMENSIONS:

SEEPAGE REMARKS:

CAVING REMARKS:

BACKFILL MATERIAL:

OTHER COMMENTS:

See Attached Figure Length: 1.0 ft. , Width: 1.0 ft.

Fast Seepage at 0.9 ft.

N/A Excavated Soil

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 11, 2023 October 11, 2023

26.0 ± (NAVD88)

1.3 ft.

N:357668 ± / E:1298435 ± NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

G

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.1

0.1

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Containment area fill.

Well graded sand with silt and gravel (SW-SM) - Brown to gray; moist to wet;

mostly fine to coarse SAND, some fine to coarse gravel, few non plastic fines. [FILL] Well graded sand with gravel (SW) - Brown to gray; wet; mostly fine to coarse SAND, some fine to coarse gravel, trace non plastic fines. [FILL]

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

Possible containment area liner encountered at 1.3 ft

Fuel Storage Tank Replacement Project TEST PIT ID: EV-BTA-5 WSE Project: ENG23-0805 NCTAMS LANT Det, Cutler, ME Page 1 of 1

CONTRACTOR:

OPERATOR:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

BUCKET TYPE:

Weston & Sampson Engineers, Inc.

S. Wuebbolt, EIT S. Wuebbolt, EIT

DRAFT

Hand Shovel/Auger N/A

TEST PIT LOCATION:

PLAN DIMENSIONS:

SEEPAGE REMARKS:

CAVING REMARKS:

BACKFILL MATERIAL:

OTHER COMMENTS:

See Attached Figure Length: 1.0 ft. , Width: 1.0 ft.

Fast Seepage at 0.3 ft.

N/A Excavated Soil

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 12, 2023 October 12, 2023

26.0 ± (NAVD88)

1.3 ft.

N:357554 ± / E:1298504 ± NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

TH

B

EL

O

W G

R O

U N

D

SU

R

FA

C E

[V

ER

TI

C

AL

F

T.

SA

M

PL

E

TY

PE

G R

AP

H

IC

G

G

PI

D

M

EA

SU

R

EM

EN

T, P

PM

BY

V O

LU

M

E (H

EA

D

SP

AC

E)

0.1

0.1

ST

R

AT

IG

R

AP

H Y

LO

G

STRATUM IDENTIFICATION

AND DESCRIPTION

Surface: Containment area fill.

Well graded sand with silt and gravel (SW-SM) - Brown to gray; moist to wet;

mostly fine to coarse SAND, some fine to coarse gravel, few non plastic fines. [FILL] Well graded sand with gravel (SW) - Brown to gray; wet; mostly fine to coarse SAND, some fine to coarse gravel, trace non plastic fines. [FILL]

EL

EV

AT

IO

N S

C

AL

E

SH

O W

N T

O N

EA

R

ES

T

FT

REMARKS, OTHER TESTS,

AND INSTALLATIONS

Note: Values in brackets preceeding a remark indicate depth below ground surface (in feet) corresponding to the remark.

Possible containment area liner encountered at 1.3 ft

Fuel Storage Tank Replacement Project TEST PIT ID: EV-BTA-6 WSE Project: ENG23-0805 NCTAMS LANT Det, Cutler, ME Page 1 of 1

CONTRACTOR:

OPERATOR:

LOGGED BY:

CHECKED BY:

EQUIPMENT:

BUCKET TYPE:

Weston & Sampson Engineers, Inc.

S. Wuebbolt, EIT S. Wuebbolt, EIT

DRAFT

Hand Shovel/Auger N/A

TEST PIT LOCATION:

PLAN DIMENSIONS:

SEEPAGE REMARKS:

CAVING REMARKS:

BACKFILL MATERIAL:

OTHER COMMENTS:

See Attached Figure Length: 1.0 ft. , Width: 1.0 ft.

Fast Seepage at 0.2 ft.

N/A Excavated Soil

DATE START:

DATE FINISH:

GROUND EL:

FINAL DEPTH:

GRID COORDS:

GRID SYSTEM:

October 12, 2023 October 12, 2023

27.0 ± (NAVD88)

1.3 ft.

N:357470 ± / E:1298469 ± NAD83 State Plane (ME)

Refer to the attached index sheets for important information about this log including general notes, legends, and guidance on description methods and procedures.

ATTACHMENT D

LABORATORY DATA REPORTS

ESS Laboratory Division of Thielsch Engineering, Inc.

BAL Laboratory The Microbiology Division of Thielsch Engineering, Inc.

CERTIFICATE OF ANALYSIS

Todd Bridgeo

Weston and Sampson Engineers, Inc.

5 Centennial Drive

Peabody, MA 01960

RE: Fuel Storage Tank Replacement Project (ENG23-0805)

ESS Laboratory Work Order Number: 23J0495

This signed Certificate of Analysis is our approved release of your analytical results. These results are only representative of sample aliquots received at the laboratory. ESS Laboratory expects its clients to follow all regulatory sampling guidelines. Beginning with this page, the entire report has been paginated.

This report should not be copied except in full without the approval of the laboratory. Samples will be disposed of thirty days after the final report has been delivered. If you have any questions or concerns, please feel free to call our Customer Service Department.

Laurel Stoddard

Laboratory Director

Analytical Summary

The project as described above has been analyzed in accordance with the ESS Quality Assurance Plan.

This plan utilizes the following methodologies: US EPA SW-846, US EPA Methods for Chemical

Analysis of Water and Wastes per 40 CFR Part 136, APHA Standard Methods for the Examination of

Water and…