C8374_Sediment_Sampling_and_Analysis_Report.pdf

Sediment Sampling and Analysis Report

Proposed Dredging of Boat Basin USCG Station Little Creek Virginia Beach, Virginia USCG Project No. 7388301

August 2016 Project Number 60493645

AECOM 301.289.3900 tel 8000 Virginia Manor Rd., # 110 301.289.3901 fax Beltsville, MD 20705

August 2016

August 1, 2016

Ms. Teresa Dailey, Contracting Specialist United States Coast Guard Civil Engineering Unit Cleveland 1240 East Ninth Street, Room 2179 Cleveland, Ohio 44199 Teresa.F.Dailey@uscg.mil

Subject: Sediment Sampling and Analysis for Proposed Dredging of the Boat Basin located at USCG Station Little Creek, Virginia Beach, Virginia – USCG Project No. 7388301 – AECOM Project No. 60493645

Dear Ms. Dailey:

AECOM Technical Services, Inc. (AECOM) has completed the Sediment Sampling and Analysis Report for the sediment investigation work associated with the proposed dredging of the boat basin and moorings at USCG Station (STA) Little Creek in Virginia Beach, Virginia.

This Sediment Sampling and Analysis Report describes site observations, sediment sampling methods and procedures, analytical results, disposal options, permit requirements, and related considerations in response to the Scope of Work §1.1.1.3.

Respectfully, Jennifer Jones Michelle Freimund, PG Environmental Lead Project Manager

Ravi Damera, P.E., BCEE Project Manager cc: Mr. Greg DeVan, Engineer-in-Charge – USCG CEU Cleveland

AECOM i

August 2016

Table of Contents

1 Introduction ................................................................................................................................................................. 1-1 2 Site Observations ........................................................................................................................................................ 2-1 3 Sediment Sampling and Analysis ............................................................................................................................... 3-1

3.1 Sediment Sampling ............................................................................................................................................... 3-2

3.2 Analytical Results .................................................................................................................................................. 3-2

4 Permitting .................................................................................................................................................................... 4-1 5 Summary ..................................................................................................................................................................... 5-1

List of Figures

Figure 1 Site Location Map Figure 2 Sample Location Map

List of Tables

Table 1 Summary of Sediment Analytical Results – Totals Table 2 Summary of Sediment Analytical Results – TCLP Table 3 Summary of Physical Characteristics – Sediment Table 4 Summary of Elutriate Analysis Table 5 Summary of Phyiscal Characteristics – Elutriate

List of Appendices

Appendix A. Boring Logs Appendix B. Laboratory Analytical and Grain Size Analysis Reports Appendix C. Grain Distribution Graphs Appendix D. Waste Profile Form

AECOM 1-1

The objective of the project is to provide pre-dredging services at the United States Coast Guard (USCG) Station (STA) Little Creek located approximately 11.5 miles northwest of Virginia Beach and approximately 2.5 miles southwest of the Chesapeake Bay Bridge-Tunnel in Virginia Beach, Virginia Beach County, Virginia (the Site) (Figure 1). STA Little Creek is situated within the navigable abutting Little Creek Channel, which connects to the Chesapeake Bay. STA Little Creek is located on the Joint Expeditionary Base Little Creek-Fort Story. The docks and moorings at STA Little Creek are located at the north end of the station.

Due to natural sediment deposition, there isn’t sufficient draft for the USCG to transit, moor and execute operational missions.

The proposed dredging is necessary to assure that the boat basin and moorings at STA Little Creek are dredged to previous depths for operational considerations of the unit and to prevent shoaling. The project will involve dredging at variable depths below Mean Lower Low Water (MLLW) within the boat basin (-4.5 MLLW to -12.5 MLLW) to allow for the unit’s boats to transit and moor.

AECOM Technical Services, Inc. (AECOM) conducted sediment sampling within the STA Little Creek boat basin and moorings to obtain samples for chemical and physical analyses for waste characterization and proper disposal of the dredged sediment.

This report summarizes the results of field investigations and evaluations conducted for planned dredging activities at the Site.

The field investigations included:

- Visual inspection of existing site conditions;

- Sediment sampling and analysis;

- AutoCad drawings of existing site and facilities;

- Identification of permits required for dredging and disposal; and,

- AECOM is also completing a Section 106 (of the National Historical Preservation Act) review for the planned dredging activities, the results of which will be presented under separate cover.

1 Introduction

AECOM 2-1

AECOM performed a sediment investigation at the Site on May 24, 2016. The purpose of the investigation was to obtain sediment samples adjacent to the boat basin and moorings at STA Little Creek within the proposed dredging area footprint for chemical analysis and waste characterization.

The USCG STA Little Creek is located at 1100 Abbott Road, Virginia Beach, Virginia. The station is situated within the navigable abutting Little Creek Channel, which connects to the Chesapeake Bay. STA Little Creek is located on the Joint Expeditionary Base Little Creek-Fort Story. The station was initially developed in 1938 on the Coast Guard Military Reservation when the lifesaving station at Cape Henry was no longer viable. In 1941, the boathouse, piers, mine storage buildings, and the troop facilities were constructed. In approximately 1994, the existing piers were demolished and three new concrete piers and a bulkhead were constructed. The station building was demolished in 1996 and a new building was constructed. A second floating pier was added in approximately 2009. The original boathouse and garage are currently present at the station. STA Little Creek serves as a home port for three large cutters and four smaller vessels and unit missions include search and rescue; recreational boating safety; enforcement of laws and treaties; marine environmental response; ports, waterways and coastal security; homeland security; and short range aids to navigation support.

The docks and moorings at STA Little Creek are located at the north end of the station. A concrete pile, concrete-decked pier extends approximately 270 feet from the concrete-capped steel bulkhead. Two concrete-surfaced floating piers and one concrete pile, concrete-decked finger pier are located perpendicular to the main pier on the east side. The main pier is fronted by timber-pile and butyl fenders extending along the eastern and western sides and steel sheet piling (wave screen) along the southern portion of the western side of the pier. A timber-pile and butyl fender system extends along the south side of the finger pier and steel sheet piling is located along the north side of the finger pier. Timber-pile fenders are located along the bulkhead. One 3-ton, electric pedestal crane with 21-foot boom is located at east corner of the foot of the main pier. A mooring dolphin is located to the east of the northern floating pier.

The layout of the boat basin and moorings, including the sediment sampling locations, site water sampling location, and hydrographic survey contour elevations, are included on Figure 2.

2 Site Observations

AECOM 3-1

The sediment sampling was conducted by a sub-consultant (Aqua Survey, Inc.) under the direction of AECOM on May 24, 2016. The sediment samples were collected utilizing a high powered electro-vibracoring system as described in Section 3.1 below. Retrieved cores were handed over to AECOM personnel onshore for logging and processing. Sediment cores were logged and samples were collected for chemical and physical analyses. Sampling and analysis of the sediment was required to identify options for the management of the dredged material.

At each sample location, multiple cores of the entire proposed dredge thickness were collected and composited until sufficient sample for all analyses was retrieved. Four composite samples (SS-1, SS-1A, SS-2, and SS-3) were properly preserved and shipped under chain of custody to TestAmerica, Inc. (TestAmerica) in Pittsburgh, Pennsylvania for chemical and physical analyses. The sediment samples were analyzed for the parameters listed in the following table:

Priority Pollutant Metals and barium (antimony, arsenic, beryllium, cadmium, chromium, copper, lead, mercury, nickel, selenium, silver, thallium, and zinc) (United States Environmental Protection Agency [USEPA] Method 6020/7471)

Toxicity Characteristic Leaching Procedure (TCLP) Metals (USEPA Method SW-846 TCLP Extraction 1311)

Volatile Organic Compounds (VOCs) (USEPA Method 8260) TCLP VOCs (USEPA Method SW-846 TCLP Extraction 1311)

Polynuclear Aromatic Hydrocarbons (PAHs) (Solid Waste

[SW] 846 8270)

TCLP SVOCs (SW-846 TCLP Extraction 1311)

Pesticides (USEPA Method 8081) TCLP Pesticides (USEPA Method SW-846 TCLP Extraction 1311)

Herbicides (USEPA 8151) Polychlorinated Biphenyls (PCBs) (USEPA Method 8082)

Grain Size Distribution with hydrometer (American Society for Testing and Materials [ASTM] D422)

Total Organic Carbon (TOC) (Lloyd Kahn)

Percent Solids (Standard Method [SM] 2540G) Percent Moisture (SM 2540G) pH (Corrosivity) (USEPA Method 9045) Specific Gravity (D854)

Total Cyanide (USEPA Method 9014) Water (Moisture) Content (ASTM D2216-90)

Total Sulfide (USEPA Method 9034) Paint Filter Test (USEPA Method 9095)

Ignitability (SW-846 1020)

In addition to the analyses listed above, elutriate samples were prepared with sediment samples and site water and analyzed for the following parameters: priority pollutant metals and barium, pesticides, PAHs, total suspended solids (SM 2540D), total phosphorus (SM4500 P E-1999), total Kjeldahl nitrogen (SM4500_NH3_C), total cyanide, and ammonia nitrogen (USEPA Method 350.1).

Additionally, a site water sample was collected and submitted for analysis for the following parameters: priority pollutant metals and barium, pesticides, PAHs, total suspended solids, total phosphorus, total Kjeldahl nitrogen, total cyanide, and ammonia nitrogen.

3 Sediment Sampling and Analysis

AECOM 3-2

3.1 Sediment Sampling

Three sediment sampling locations (SS-1, SS-2 and SS-3) were located within the proposed dredging footprint identified on Figure 2. Two (2) samples were collected at sampling location SS-1 and one sample was collected at sampling locations SS- 2 and SS-3, for a total of four samples. A second sample was collected from sampling location SS-1 as a contingency sample (SS-1A). The scope of work initially proposed dredging to a depth of -4.5 MLLW adjacent to the bulkhead. However, to maximize the target dredge depth in this area, the USCG requested that a contingency sample be collected in this location which extended to the previously dredged depth in 1972. Review of engineering drawings indicated the target dredge depth in this location to be -6 MLLW.

Four composite sediment samples (SS-1, SS-1A, SS-2, and SS-3) were collected at depths up to 0.79, 2.29, 2.3, and 3.39 feet below the surface of the sediment, respectively (Figure 2). Additionally, one duplicate sample (SS-1-DUP) was collected from SS-1. At the time of the hydrographic survey, conducted on May 10, 2016, depth to sediment at the sample locations varied from 3.71 to 9.11 feet below water surface. However, at the time of the sediment sampling the depth to sediment at the sample locations varied from 7.3 to 14.2 feet below water surface. Samples were collected based on the shallower water depths. The samples were collected using a high powered electro-vibracoring system to advance a four-inch diameter steel core barrel with a flexible polyethylene core liner. The core barrel was equipped with a one-way core catcher and check valve that prevents the core sample from washing out. To obtain a sample, the core tube was driven into the sediment by the force of gravity, enhanced by vibration energy.

Immediately following sample collection, the sample cores were transferred to AECOM personnel to be visually characterized and logged along with the sample depth and length recovered. The sediments were extracted from the tubing and placed in a stainless steel bowl. The material was homogenized (except for the samples collected for VOC analysis) using a stainless steel spoon and transferred into appropriate sample containers for the specified analyses. The sediment samples were classified using the Unified Soil Classification System. Generally, the sediment samples consisted of light to dark gray well-sorted, fine- to medium-grained sand (SW) and tan to dark gray silty sand (SM). Some organics (wood fragments, peat and shells) were observed from approximately 1.3 to 1.8 feet at SS-2 and approximately 1.4 to 2.4 feet at SS-3. No petroleum odor or sheen was observed at the sediment sample locations. A slight hydrogen sulfide odor was noted throughout the sediment samples. Boring logs are contained in Appendix A.

For the elutriate testing, one composite sediment sample (Elutriate) was prepared using sediment samples SS-1, SS-1A, SS- 2, and SS-3. Additionally, one site water sample (SW) was collected from the water column within the proposed dredged area using a submersible pump.

3.2 Analytical Results

The sediment analytical results received from TestAmerica were compared to the following screening criteria:

- Virginia Voluntary Remediation Program (VRP) Tier II Screening Levels for Sediment: Unrestricted Use

- Virginia VRP Tier II Surface Water Screening Levels for Other Surface Water – Marine

- EPA TCLP regulatory levels

Tables 1 through 5 summarize the results of the sediment, surface water and elutriate analyses.

Concentrations of metals, PAHs, and pesticides were detected in sediment samples SS-1, SS-1A, SS-2, and SS-3 at concentrations above the laboratory’s reporting limits but below the VRP Tier II Screening Levels for Sediment for Unrestricted Use. Concentrations of PCBs were detected in sediment samples SS-2 and SS-3 at concentrations above the laboratory’s reporting limits but below the VRP Tier II Screening Levels for Sediment for Unrestricted Use. Herbicides and VOCs were not detected above the laboratory’s reporting limits. No constituents exceeded the VRP Tier II Screening Levels for Sediment for Unrestricted Use.

Concentrations of TCLP Metals (arsenic, barium, cadmium, chromium, lead, and mercury) were detected in sediment samples SS-1, SS-1A, SS-2, and/or SS-3 at concentrations above the laboratory’s reporting limits but below the EPA TCLP regulatory

AECOM 3-3

levels. TCLP Pesticides, TCLP VOCs, and TCLP SVOCs were not detected above the laboratory’s reporting limits. Based on the TCLP results, the sediment is characterized as non-hazardous waste.

The pH of the sediment samples for SS-1, SS-1A, SS-2, and SS-3 were 8.09, 7.98, 8.52, and 7.59, respectively. These values are between 2 and 12.5 indicating that the dredged spoils can be classified as non-corrosive. The ignitability results for the sediment samples were reported as greater than 140 degrees Fahrenheit indicating that the material can be classified as non-ignitable. Concentrations of total cyanide were detected in sediment samples SS-1, SS-1A, and SS-2 at estimated concentrations above the laboratory’s reporting limits. Concentrations of sulfide were detected in sediment samples SS-2 and SS-3 at concentrations above the laboratory’s reporting limits. The EPA no longer recommends threshold levels or methods to determine if a waste is hazardous based on the characteristic of reactivity. Therefore, this determination will be made by the disposal facility on a case by case basis. The sediment sample results did not indicate toxicity above any established regulatory levels for the parameters for which the EPA have prescribed limits and methodology.

The grain size analysis indicated that the sediment material consisted of 8.2, 24.2, 18.1, and 9.7 percent fines (passing a # 200 sieve) in samples SS-1, SS-1A, SS-2, and SS-3, respectively. The duplicate sample (SS-1-DUP) from SS-1 had 6.6 percent fines. Results of the grain size analysis are presented in Appendix B. Grain size distribution graphs are presented in Appendix C. It should be noted that while the percentages of fines were relatively low in the sediment samples, none of the in-situ sediment samples passed the paint filter liquid test.

The elutriate analysis for the composite sample (Elutriate) resulted in detections of metals, PAHs, and pesticides in the total fraction above the laboratory’s reporting limits but below the VRP Tier II Screening Levels for Surface Water – Marine. Metal and PAH concentrations were detected in the dissolved fraction above the laboratory’s reporting limits but below the VRP Tier II Screening Levels for Surface Water – Marine. No pesticide concentrations were detected above laboratory reporting limits in the dissolved fraction. Metal concentrations were detected above laboratory reporting limits but below the applicable water quality criteria in the site water sample (SW). No pesticide or PAH concentrations were detected above laboratory reporting limits in the site water sample. The elutriate analytical results are presented in Tables 4 and 5, and the laboratory analytical report is included in Appendix B.

AECOM 4-1

Preliminary review indicates the dredging of the boat basin at STA Little Creek may require a request for a Regional Permit with the USACE and a Virginia Water Protection Permit with the Virginia Department of Environmental Quality (VDEQ). The USACE and the VDEQ have simplified the permitting process by allowing the submittal of a joint permit application. Approval of the project may also be required by the Virginia Marine Resources Commission. AECOM will discuss the project and permit options with the USACE and VDEQ staff. Discussions with the appropriate federal, state and local regulatory agencies and submittal of the joint permit application will occur following the USCG’s review and approval of this sediment sampling report.

4 Permitting

AECOM 5-1

AECOM collected four sediment samples from three locations within the proposed dredging area at the STA Little Creek boat basin. The sediment samples collected indicated that the sediment consists predominantly of sand and silty sand. The samples were analyzed for chemical and physical analyses for waste characterization and profiling to ensure proper disposal of the dredged sediment.

The sediment was representatively sampled and tested for the following parameters: total concentrations of the priority pollutant metals and barium; VOCs; PAHs; pesticides; herbicides; PCBs; TCLP VOCs, SVOCs, pesticides, and metals;

reactivity, corrosivity, and ignitability; grain size; TOC; percent moisture; water content; percent solids; specific gravity; and the paint filter test. In addition to the sediment analyses, elutriate samples were prepared with sediment samples and site water and analyzed for priority pollutant metals and barium; pesticides; PAHs; total suspended solids; total phosphorus; total Kjeldahl nitrogen; total cyanide; and ammonia nitrogen. Additionally, a site water sample was collected and submitted for analysis of priority pollutant metals and barium; pesticides; PAHs; total suspended solids; total phosphorus; total Kjeldahl nitrogen; total cyanide; and ammonia nitrogen.

The results of the chemical analysis indicated that the sediment samples were below either the laboratory’s reportable limits or the VRP Tier II Screening Levels for Sediment for Unrestricted Use. All TCLP results were below the reporting limits;

therefore, the sediment is characterized as a non-hazardous waste. All four samples can be characterized as non-corrosive and non-ignitable. The results of the grain size analysis indicated that the samples had less than 25 percent of the material retained on the No. 200 sieve. Although the percentages of fines were relatively low in the sediment samples, none of the in-situ sediment samples passed the paint filter liquid test.

The results of the elutriate analysis indicated that elutriate samples (total and dissolved fractions) were below either the laboratory’s reportable limits or the VRP Tier II Screening Levels for Surface Water – Marine. The results of the water analysis indicated that the site water sample were below either the laboratory’s reportable limits or the VRP Tier II Screening Levels for Surface Water – Marine.

Based upon the chemical and physical analyses, it is anticipated that the dredge material can be disposed of at the Clearfield MMG, Inc. facility in Chesapeake, Virginia. This facility is a licensed materials recovery facility permitted to accept dredge sediment. As indicated above, the concentrations detected in the sediment samples did not exceed the VRP Tier II Screening Levels for Sediment for Unrestricted Use. Additionally, based on analytical results the sediment can be characterized as non-hazardous waste based on established regulatory levels. AECOM will work with the representative at the landfill to prepare the waste profile and obtain formal waste disposal approval.

Once the Waste Profile Form (included in Appendix D) is completed, it will need to be submitted to the disposal facility along with the laboratory reports. AECOM will also discuss the results of the paint filter tests with the disposal facility to determine if additional paint filter testing and/or solidification are needed prior to disposal. Dewatering of the material may also be necessary before the material can be disposed of at the landfill.

5 Summary

AECOM

Figures

Copyright:© 2013 National Geographic Society, i-cubed Map Location

April 2016

Site Location Map USCG STA Little Creek Virginia Beach, Virginia

AECOM Environment 1600 Perimeter Park Drive, Suite 400 Morrisville, North Carolina 27560 Phone: (919) 461-1100 Web: http://www.aecom.com

0 1,000 2,000 Feet

VA

NC

WV

MD MD DEOH

TN

KY Little Creek USGS Topographic Quadrangle

60493645

Z:\GIS\Projects\U\US_Coast_Guard\Virginia_Beach_Little_Creek\Figure_1_1_Site_Location_Little_Creek.mxd

Site Location

1 inch = 2,000 feet µ Figure 1

8000 Virginia Manor Road, Suite 110

Beltsville, MD 20705

Tables

Table 1 Summary of Sediment Analytical Results - Totals USCG STA Little Creek, Virginia Beach, Virginia

SS-1 SS-1A SS-2 SS-3 SS-1-DUP

0-0.79 0-2.29 0-2.3 0-3.39 0-0.79 5/24/16 5/24/16 5/24/16 5/24/16 5/24/16

Constituent Units

VRP Tier II Sediment

Screening Level Metals (EPA Method 6020A) Antimony mg/kg 31 0.064 J 0.11 J 0.22 0.18 0.069 J Arsenic mg/kg 34 1.5 4.1 3.1 1.6 1.3 Barium mg/kg 15,000 3.1 7.4 8.4 17 2.5 Beryllium mg/kg 160 0.050 J 0.15 0.13 0.085 0.045 J Cadmium mg/kg 70 0.014 J 0.0083 J 0.32 0.14 0.028 J Chromium mg/kg 30 3.2 9.7 8.3 5.0 2.8 Copper mg/kg 3,100 4.6 3.8 19 11 4.0 Lead mg/kg 400 3.7 4 12 11 4.1 Nickel mg/kg 1,500 0.96 1.6 3.8 1.6 0.68 Selenium mg/kg 390 0.14 J 0.46 0.47 0.20 J 0.16 J Silver mg/kg 390 0.026 J 0.025 J 0.081 0.26 0.021 J Thallium mg/kg 0.78 0.033 J 0.054 J 0.056 J 0.030 J 0.022 J Zinc mg/kg 23,000 11 7.1 110 33 21 Mercury (EPA Method 7471B) Mercury mg/kg 9.4 <0.0040 0.0052 J 0.067 0.063 0.0097 J Pesticides (EPA Method 8081B) Aldrin mg/kg 1.8 <0.000044 <0.000046 <0.000049 <0.000047 F2 <0.000045 alpha-BHC mg/kg 8.5 <0.000040 <0.000042 <0.000045 <0.000043 <0.000041 beta-BHC mg/kg 30 <0.000064 <0.000067 <0.000071 <0.000068 F2 <0.000065 delta-BHC mg/kg 8.5 <0.000038 <0.000040 <0.000042 <0.000040 F2 <0.000038 gamma-BHC (Lindane) mg/kg 21 <0.000043 <0.000045 <0.000048 <0.000046 <0.000044 alpha-Chlordane mg/kg 35 <0.000049 <0.000051 <0.000054 <0.000052 F2 <0.000050 gamma-Chlordane mg/kg 35 <0.000049 <0.000051 <0.000054 <0.000052 <0.000049 4,4'-DDD mg/kg 220 0.00012 J <0.000034 0.00012 J p 0.00037 p <0.000033 4,4'-DDE mg/kg 160 <0.000037 <0.000039 0.00060 0.00050 F2 p <0.000038 4,4'-DDT mg/kg 36 <0.000037 <0.000039 0.00013 J p 0.0018 F1 p <0.000038 Dieldrin mg/kg 3.1 <0.000041 <0.000043 <0.000046 0.00012 J p <0.000042 Endosulfan I mg/kg 370 <0.000047 <0.000049 <0.000052 0.000091 J p <0.000047 Endosulfan II mg/kg 370 <0.000044 <0.000045 <0.000048 <0.000046 <0.000044 Endosulfan sulfate mg/kg 370 <0.000026 <0.000027 <0.000029 <0.000027 <0.000026 Endrin mg/kg 18 <0.000048 0.000063 J p <0.000053 0.00096 F2 <0.000049 Endrin aldehyde mg/kg 18 <0.000048 <0.000050 <0.000053 0.00016 J F2 p <0.000049 Endrin ketone mg/kg 18 <0.000039 <0.000040 <0.000043 <0.000041 <0.000039 Heptachlor mg/kg 12 <0.000055 <0.000057 <0.000061 <0.000058 F2 <0.000056 Heptachlor epoxide mg/kg 0.8 <0.000048 <0.000050 <0.000053 0.00018 J F2 p <0.000049 Methoxychlor mg/kg 310 0.00016 J B <0.000054 <0.000057 <0.000055 <0.000052 Toxaphene mg/kg 48 <0.0017 <0.0017 <0.0018 <0.0017 <0.0017 Herbicides (EPA Method 8151A) 2,4-D mg/kg NS <0.0065 <0.0068 <0.0072 <0.0069 <0.0066 2,4,5-T mg/kg NS <0.003 <0.0031 <0.0033 <0.0032 <0.0030 Silvex (2,4,5-TP) mg/kg NS <0.0025 <0.0026 <0.0028 <0.0027 <0.0025 Polychlorinated Biphenyls (EPA Method 8082A) Arochlor 1016 mg/kg 4 <0.0011 <0.0012 <0.0013 <0.0012 <0.0011 Arochlor 1221 mg/kg 15 <0.0018 <0.0019 <0.0020 <0.0019 <0.0018 Arochlor 1232 mg/kg 15 <0.00062 <0.00065 <0.00069 <0.00066 <0.00063 Arochlor 1242 mg/kg 24 <0.00091 <0.00095 <0.0010 <0.00097 <0.00092 Arochlor 1248 mg/kg 24 <0.00058 <0.00060 <0.00064 <0.00061 <0.00058 Arochlor 1254 mg/kg 1.1 <0.00091 <0.00095 0.0046 0.027 <0.00092 Arochlor 1260 mg/kg 24 <0.00085 <0.00088 0.0033 0.011 <0.00086

Sample ID Sample Interval Depth (feet)

Date

USCG STA Little Creek, Virginia Beach, Virginia

SS-1 SS-1A SS-2 SS-3 SS-1-DUP

0-0.79 0-2.29 0-2.3 0-3.39 0-0.79 5/24/16 5/24/16 5/24/16 5/24/16 5/24/16

Constituent Units

VRP Tier II Sediment

Screening Level

Sample ID Sample Interval Depth (feet)

Date

Volatile Organic Compounds (EPA Method 8260C) Acetone mg/kg 61,000 <0.0026 <0.0029 <0.0031 <0.0031 <0.0036 Benzene mg/kg 82 <0.00071 <0.00079 <0.00084 <0.00084 <0.00097 Bromoform mg/kg 1,200 <0.0021 <0.0024 <0.0025 <0.0025 <0.0029 Bromomethane mg/kg 6.8 <0.0011 <0.0013 <0.0013 <0.0013 <0.0016 2-Butanone (MEK) mg/kg 27,000 <0.0018 <0.0020 <0.0022 <0.0022 <0.0025 Carbon disulfide mg/kg 770 <0.00099 <0.0011 <0.0012 <0.0012 <0.0014 Carbon tetrachloride mg/kg 65 <0.00064 <0.00071 <0.00075 <0.00075 <0.00087 Chlorobenzene mg/kg 280 <0.00078 <0.00087 <0.00093 <0.00093 <0.0011 Chlorodibromomethane mg/kg 73 <0.0012 <0.0014 <0.0015 <0.0015 <0.0017 Chloroethane mg/kg 1,400 <0.0020 <0.0023 <0.0024 <0.0024 <0.0028 Chloroform mg/kg 32 <0.00067 <0.00074 <0.00079 <0.00079 <0.00091 Chloromethane mg/kg 110 <0.00099 <0.0011 <0.0012 <0.0012 <0.0014 Cyclohexane mg/kg 6,500 <0.00082 <0.00092 <0.00097 <0.00098 <0.0011 1,2-Dibromo-3-Chloropropane mg/kg 0.53 <0.0019 <0.0021 <0.0023 <0.0023 <0.0026 1,2-Dibromoethane mg/kg 3.6 <0.0010 <0.0011 <0.0012 <0.0012 <0.0014 1,2-Dichlorobenzene mg/kg 1,800 <0.0015 <0.0016 <0.0017 <0.0017 <0.0020 1,3-Dichlorobenzene mg/kg NS <0.0011 <0.0012 <0.0013 <0.0013 <0.0015 1,4-Dichlorobenzene mg/kg 260 <0.0012 <0.0014 <0.0015 <0.0015 <0.0017 1,1-Dichloroethane mg/kg 360 <0.00073 <0.00081 <0.00086 <0.00086 <0.00099 1,2-Dichloroethane mg/kg 31 <0.00073 <0.00082 <0.00087 <0.00087 <0.0010 1,1-Dichloroethene mg/kg 230 <0.00092 <0.0010 <0.0011 <0.0011 <0.0013 cis-1,2-Dichloroethene mg/kg 160 <0.0013 <0.0015 <0.0016 <0.0016 <0.0018 trans-1,2-Dichloroethene mg/kg 1,600 <0.00092 <0.0010 <0.0011 <0.0011 <0.0013 1,2-Dichloropropane mg/kg 16 <0.00082 <0.00092 <0.00097 <0.00098 <0.0011 cis-1,3-Dichloropropene mg/kg 1,600 <0.00068 <0.00076 <0.00080 <0.0008 <0.00093 trans-1,3-Dichloropropene mg/kg 1,600 <0.00087 <0.00097 <0.0010 <0.0010 <0.0012 Dichlorobromomethane mg/kg 29 <0.00071 <0.00079 <0.00084 <0.00084 <0.00097 Dichlorodifluoromethane mg/kg 87 <0.0012 <0.0014 <0.0014 <0.0014 <0.0017 Ethylbenzene mg/kg 580 <0.00097 <0.0011 <0.0012 <0.0012 <0.0013 2-Hexanone mg/kg 200 <0.0018 <0.0020 <0.0021 <0.0021 <0.0025 Isopropylbenzene mg/kg 1,900 <0.00073 <0.00081 <0.00086 <0.00086 <0.00099 Methyl acetate mg/kg 78,000 <0.0062 <0.0069 <0.0073 <0.0073 <0.0084 Methyl tert-butyl ether mg/kg 4,700 <0.0010 <0.0012 <0.0012 <0.0012 <0.0014 Methylcyclohexane mg/kg NS <0.00082 <0.00091 <0.00097 <0.00097 <0.0011 Methylene Chloride mg/kg 350 <0.0035 <0.0039 <0.0042 <0.0042 <0.0048 4-Methyl-2-pentanone (MIBK) mg/kg 5,300 <0.0018 <0.0020 <0.0021 <0.0021 <0.0024 Styrene mg/kg 6,000 <0.00093 <0.0010 <0.0011 <0.0011 <0.0013 Tetrachloroethene mg/kg 81 <0.00081 <0.0009 <0.00096 <0.00096 <0.0011 Toluene mg/kg 4,900 <0.00065 <0.00072 <0.00077 <0.00077 <0.00089 1,1,2,2-Tetrachloroethane mg/kg 60 <0.00084 <0.00093 <0.00099 <0.00099 <0.0011 1,2,4-Trichlorobenzene mg/kg 58 <0.0019 <0.0021 <0.0023 <0.0023 <0.0026 1,1,1-Trichloroethane mg/kg 8,100 <0.00056 <0.00062 <0.00066 <0.00066 <0.00076 1,1,2-Trichloroethane mg/kg 1.5 <0.0013 <0.0014 <0.0015 <0.0015 <0.0018 Trichloroethene mg/kg 4.1 <0.00078 <0.00087 <0.00092 <0.00092 <0.0011 1,1,2-Trichloro-1,2,2-trifluoroethane mg/kg 40,000 <0.0019 <0.0021 <0.0022 <0.0022 <0.0026 Trichlorofluoromethane mg/kg 730 <0.0011 <0.0012 <0.0012 <0.0012 <0.0014 Vinyl chloride mg/kg 5.9 <0.0011 <0.0012 <0.0013 <0.0013 <0.0015 Xylenes, Total mg/kg 580 <0.0012 <0.0014 <0.0014 <0.0014 <0.0017

USCG STA Little Creek, Virginia Beach, Virginia

SS-1 SS-1A SS-2 SS-3 SS-1-DUP

0-0.79 0-2.29 0-2.3 0-3.39 0-0.79 5/24/16 5/24/16 5/24/16 5/24/16 5/24/16

Constituent Units

VRP Tier II Sediment

Screening Level

Sample ID Sample Interval Depth (feet)

Date

Polynuclear Aromatic Hydrocarbons (EPA Method 8270D) Acenaphthene mg/kg 3,500 0.0015 J 0.0042 0.00059 J 0.016 0.0071 Acenaphthylene mg/kg 1,700 0.0047 0.0061 0.0017 J 0.074 0.021 Anthracene mg/kg 17,000 0.0065 0.037 0.0027 J 0.092 0.048 Benzo[a]anthracene mg/kg 15 0.059 0.036 0.0045 0.220 0.085 Benzo[a]pyrene mg/kg 1.5 0.078 0.025 0.0049 0.290 0.079 Benzo[b]fluoranthene mg/kg 15 0.130 0.040 0.008 0.470 0.150 Benzo[g,h,i]perylene mg/kg 1,700 0.110 0.018 0.0037 J 0.180 0.043 Benzo[k]fluoranthene mg/kg 150 0.040 0.015 0.0028 J 0.160 0.060 Chrysene mg/kg 1,500 0.093 0.050 0.011 0.340 0.130 Dibenz(a,h)anthracene mg/kg 1.5 0.019 0.0046 <0.00049 0.053 0.015 Fluoranthene mg/kg 2,300 0.150 0.130 0.014 0.570 0.740 Fluorene mg/kg 2,300 0.0016 J 0.0063 0.00070 J 0.016 0.0055 Indeno[1,2,3-cd]pyrene mg/kg 15 0.082 0.016 0.0035 J 0.160 0.040 1-Methylnaphthalene mg/kg NS <0.00042 <0.00044 <0.00047 0.0029 J 0.00048 J 2-Methylnaphthalene mg/kg 230 0.00054 J 0.00090 J <0.00039 0.0054 0.00087 J Naphthalene mg/kg 130 <0.00034 0.0021 J <0.00038 0.012 0.0013 J Phenanthrene mg/kg 1,700 0.030 0.022 0.0014 J 0.076 0.016 Pyrene mg/kg 1,700 0.100 0.090 0.021 0.670 0.480 Notes:

VRP Tier II Sediment Screening Levels EPA - Environmental Protection Agency mg/kg - milligrams per kilogram J - Result is less than the Reporting Limit (RL) but greater than or equal to the Method Detection Limit (MDL) and the concentration is an approximate value.

p - The percent Relative Percent Difference (RPD) between the primary and confirmation column/detector is >40%. The lower result has been reported.

F1 - Matrix Spike (MS) and/or Matrix Spike Duplicate (MSD) Recovery is outside acceptance limits.

F2 - MS/MSD RPD exceeds control limits.

NS - No Standard Detected compounds are shown in Bold. Bold and highlighted concentrations exceed the lowest applicable screening criteria.

Virginia Voluntary Remediation Program (VRP) Tier II Sediment Screening Concentration, Table 2.8 Selection of Contaminants of Concern Sediment:

Unrestricted (Residential), Revised August 13, 2014

Table 2 Summary of Sediment Analytical Results - TCLP USCG STA Little Creek, Virginia Beach, Virginia

SS-1 SS-1A SS-2 SS-3 SS-1-DUP

0-0.79 0-2.29 0-2.3 0-3.39 0-0.79 5/24/16 5/24/16 5/24/16 5/24/16 5/24/16

Arsenic mg/L <5 <0.048 <0.048 0.051 J <0.048 <0.048 Barium mg/L <100 0.051 J 0.12 J 0.10 J 0.28 J 0.059 J Cadmium mg/L <1 <0.0020 <0.0020 0.0038 J 0.0067 J <0.0020 Chromium mg/L <5 <0.0061 <0.0061 <0.0061 0.0092 J 0.011 J Lead mg/L <5 <0.031 <0.031 0.072 J 0.21 J <0.031 Selenium mg/L <1 <0.038 <0.038 <0.038 <0.038 <0.038 Silver mg/L <5 <0.012 <0.012 <0.012 <0.012 <0.012

Mercury mg/L < 0.2 <0.000052 <0.000052 0.00013 J B 0.000072 J B 0.00013 J B Pesticides, TCLP (EPA Method 8081/1311) Chlordane mg/L <0.03 <0.00066 <0.00066 <0.00066 <0.00066 <0.00066 Endrin mg/L <0.02 <0.00039 <0.00039 <0.00039 <0.00039 <0.00039 gamma-BHC (Lindane) mg/L <0.4 <0.00032 <0.00032 <0.00032 <0.00032 <0.00032 Heptachlor mg/L <0.008 <0.00040 <0.00040 <0.00040 <0.00040 <0.00040 Heptachlor epoxide mg/L <0.008 <0.00039 <0.00039 <0.00039 <0.00039 <0.00039 Methoxychlor mg/L <10 <0.00037 <0.00037 <0.00037 <0.00037 <0.00037 Toxaphene mg/L <0.5 <0.0074 <0.0074 <0.0074 <0.0074 <0.0074

Benzene mg/L <0.5 <0.040 <0.040 <0.040 <0.040 <0.040 2-Butanone (MEK) mg/L <200 <0.043 <0.043 <0.043 <0.043 <0.043 Carbon tetrachloride mg/L <0.5 <0.043 <0.043 <0.043 <0.043 <0.043 Chlorobenzene mg/L <100 <0.021 <0.021 <0.021 <0.021 <0.021 Chloroform mg/L <6 <0.040 <0.040 <0.040 <0.040 <0.040 1,2-Dichloroethane mg/L <0.5 <0.038 <0.038 <0.038 <0.038 <0.038 1,1-Dichloroethene mg/L <0.7 <0.043 <0.043 <0.043 <0.043 <0.043 Tetrachloroethene mg/L <0.7 <0.033 <0.033 <0.033 <0.033 <0.033 Trichloroethene mg/L <0.5 <0.032 <0.032 <0.032 <0.032 <0.032 Vinyl chloride mg/L <0.2 <0.052 <0.052 <0.052 <0.052 <0.052

1,4-Dichlorobenzene mg/L <7.5 <0.012 <0.012 <0.012 <0.012 <0.012 2,4-Dinitrotoluene mg/L <0.13 <0.010 <0.010 <0.010 <0.010 <0.010 Hexachlorobutadiene mg/L <0.5 <0.013 <0.013 <0.013 <0.013 <0.013 Hexachlorobenzene mg/L <0.13 <0.011 <0.011 <0.011 <0.011 <0.011 Hexachloroethane mg/L <3 <0.013 <0.013 <0.013 <0.013 <0.013 2-Methylphenol (o-Cresol) mg/L <200 <0.014 <0.014 <0.014 <0.014 <0.014 4-Methylphenol* (p-Cresol) mg/L <200 <0.027 <0.027 <0.027 <0.027 <0.027 Nitrobenzene mg/L <2 <0.013 <0.013 <0.013 <0.013 <0.013 Pentachlorophenol mg/L <100 <0.022 <0.022 <0.022 <0.022 <0.022 Pyridine mg/L <5 <0.0083 <0.0083 <0.0083 <0.0083 <0.0083 2,4,5-Trichlorophenol mg/L <400 <0.013 <0.013 <0.013 <0.013 <0.013 2,4,6-Trichlorophenol mg/L <2 <0.011 <0.011 <0.011 <0.011 <0.011 Notes:

EPA - Environmental Protection Agency TCLP - Toxicity Characteristic Leaching Procedure TCLP Regulatory Level mg/L - milligrams per liter J - Result is less than the Reporting Limit (RL) but greater than or equal to the Method Detection Limit (MDL) and the concentration is an approximate value.

B - Compound was found in the blank and sample.

* - The result reported represents the combined total of both 3-Methylphenol (m-Cresol) and 4-Methylphenol (p-Cresol) Detected compounds are shown in Bold. Bold and highlighted concentrations exceed the applicable screening criteria.

Sample ID Sample Interval Depth (feet)

Date

Mercury, TCLP (EPA Method 7470A/1311)

Semi-Volatile Organic Compounds (EPA Method 8270D/1311)

Volatile Organic Compounds (EPA Method 8260C/1311)

Metals, TCLP (EPA Method 6010C/1311) UnitsConstituent

TCLP Regulatory Level

Table 3 Summary of Physical Characteristics - Sediment USCG STA Little Creek, Virginia Beach, Virginia

SS-1 SS-1A SS-2 SS-3 SS-1-DUP

0-0.79 0-2.29 0-2.3 0-3.39 0-0.79 5/24/16 5/24/16 5/24/16 5/24/16 5/24/16

Constituent Units US EPA Maximum

Concentration

Moisture Content % NS 25.8 27.3 36.4 28.3 22.3

Percent Moisture % NS 15.7 19.3 24.2 21.0 17.1

Percent Solids % NS 84.3 80.7 75.8 79.0 82.9

Specific Gravity -- NS NA 2.69 2.66 2.68 NA pH Soil (9045D) pH Std. Units pH < 2 or > 12.5 8.09 7.98 8.52 7.59 7.99 Cyanide (9014) Cyanide, Total mg/kg NS 0.052 J 0.067 J 0.11 J <0.044 <0.040 Sulfide (9034) Sulfide mg/kg NS <7.1 <7.4 290 670 26 J Ignitability (1020B) Ignitability °F Flashpoint <140 °F >140 >140 >140 >140 >140 Paint Filter Liquids Test (9095B) Free Liquids -- PASS/FAIL CFL CFL CFL CFL CFL Total Organic Carbon (Lloyd Kahn) Total Organic Carbon mg/kg NS 1,500 1,600 4,100 2,700 1,600 Notes:

EPA - Environmental Protection Agency % - percent mg/kg - milligrams per kilogram J - Result is less than the Reporting Limit (RL) but greater than or equal to the Method Detection Limit (MDL) and the concentration is an approximate value.

Std. Units - standard units °F - degrees Fahrenheit CFR - Code of Federal Regulations NS - No Standard NA - Not Analyzed CFL - Contains Free Liquid Bold and highlighted concentrations exceed the lowest applicable screening criteria.

Specific Gravity (D854)

Date Sample Interval Depth (feet)

Sample ID

Percent Solids (2540G)

Water (Moisture) Content (D2216-90)

Percent Moisture (2540G)

Table 4 Summary of Elutriate Analysis USCG STA Little Creek, Virginia Beach, Virginia

Elutriate (dissolved) Elutriate (total) SW (site water)

5/24/16 5/24/16 5/24/16 Constituent Units VRP Tier II Surface Water

- Marine Screening Level

Antimony ug/L 640 2.0 B 1.9 J 0.22 J B Arsenic ug/L 36 1.3 1.7 14 Barium ug/L NS 26 B 26 15 Beryllium ug/L NS <0.037 0.063 J <0.037 Cadmium ug/L 8.8 <0.11 <0.11 <0.11 Chromium ug/L 50 <0.54 1.3 J 4.2 Copper ug/L 6 1.2 J 3.2 2.6 Lead ug/L 9.3 0.049 J 2.1 0.069 J Nickel ug/L 8.2 0.72 J 1.1 1.2 Selenium ug/L 71 <0.42 <0.42 4.4 J Silver ug/L NS <0.036 <0.036 <0.036 Thallium ug/L 0.47 <0.015 <0.015 <0.015 Zinc ug/L 81 1.2 J 9.4 4.4 J

Mercury ug/L 0.94 <0.052 <0.052 <0.052

Aldrin ug/L 0.0005 <0.00078 <0.00078 <0.00079 alpha-BHC ug/L 0.049 <0.00062 <0.00062 <0.00063 beta-BHC ug/L 0.017 <0.00094 <0.00094 <0.00095 delta-BHC ug/L NS <0.00036 0.0014 <0.00036 gamma-BHC (Lindane) ug/L 1.8 <0.00075 <0.00075 <0.00076 alpha-Chlordane ug/L NS <0.00092 0.0013 <0.00093 gamma-Chlordane ug/L NS <0.00091 0.0037 <0.00091 4,4'-DDD ug/L 0.0031 <0.00063 0.00093 J p <0.00064 4,4'-DDE ug/L 0.00022 <0.00075 <0.00075 <0.00075 4,4'-DDT ug/L 0.00022 <0.00070 <0.00070 <0.00070 Dieldrin ug/L 0.00054 <0.00077 <0.00077 <0.00078 Endosulfan I ug/L 0.0087 <0.00089 <0.00089 <0.00090 Endosulfan II ug/L 0.0087 <0.00092 <0.00092 <0.00093 Endosulfan sulfate ug/L 89 <0.00054 0.00070 J <0.00054 Endrin ug/L 0.0023 <0.00091 <0.00091 <0.00091 Endrin aldehyde ug/L 0.5 <0.00085 0.0021 <0.00086 Endrin ketone ug/L NS <0.00087 <0.00087 <0.00088 Heptachlor ug/L 0.00079 <0.00093 <0.00093 <0.00094 Heptachlor epoxide ug/L 0.00039 <0.00092 <0.00092 <0.00092 Methoxychlor ug/L 0.03 <0.00086 0.0012 J p <0.00087 Toxaphene ug/L 0.0002 <0.018 <0.018 <0.018

Acenaphthene ug/L 990 0.052 J 0.055 J <0.028 Acenaphthylene ug/L NS <0.020 <0.020 <0.021 Anthracene ug/L 40,000 <0.018 <0.018 <0.018 Benzo[a]anthracene ug/L 0.18 <0.034 <0.034 <0.035 Benzo[a]pyrene ug/L 0.18 <0.026 <0.026 <0.027 Benzo[b]fluoranthene ug/L 0.18 <0.045 <0.045 <0.047 Benzo[g,h,i]perylene ug/L NS <0.027 <0.027 <0.028 Benzo[k]fluoranthene ug/L 0.18 <0.028 <0.028 <0.029 Chrysene ug/L 0.018 <0.029 <0.029 <0.030 Dibenz(a,h)anthracene ug/L 0.18 <0.025 <0.025 <0.026 Fluoranthene ug/L 140 0.21 0.36 <0.020 Fluorene ug/L 5,300 <0.022 0.022 J <0.023 Indeno[1,2,3-cd]pyrene ug/L 0.18 <0.040 <0.040 <0.042 1-Methylnaphthalene ug/L NS <0.029 <0.029 <0.030 2-Methylnaphthalene ug/L NS <0.018 <0.018 <0.018 Naphthalene ug/L NS <0.021 <0.021 <0.022 Phenanthrene ug/L NS <0.038 <0.038 <0.040 Pyrene ug/L 4,000 0.24 0.41 <0.022 Notes:

VRP Tier II Surface Water Screening Levels ug/L - micrograms per liter

B - Compound was found in the blank and sample.

NS - No Standard Detected compounds are shown in Bold. Bold and highlighted concentrations exceed the lowest applicable screening criteria.

p - The percent Relative Percent Difference (RPD) between the primary and confirmation column/detector is >40%. The lower result has been reported.

Virginia Voluntary Remediation Program (VRP) Tier II Surface Water Screening Concentrations, Table 2.7c Other Surface Water - Marine, Revised July 23, 2014

Metals (Environmental Protection Agency [EPA] Method 6020A)

Semi-Volatile Organic Compounds (EPA Method 8270D)

Sample ID Date

Mercury (EPA Method 7470A)

Pesticides (EPA Method 8081B)

J - Result is less than the Reporting Limit (RL) but greater than or equal to the Method Detection Limit (MDL) and the concentration is an approximate value.

Table 5 Summary of Physical Characteristics - Elutriate USCG STA Little Creek, Virginia Beach, Virginia

Elutriate (dissolved) Elutriate (total) SW (site water)

5/24/16 5/24/16 5/24/16

Constituent Units US EPA Maximum

Concentrations Ammonia Nitrogen (350.1) Ammonia (as Nitrogen) mg/L NS 1.6 1.5 0.10 Total Suspended Solids (SM 2540D) Total Suspended Solids mg/L NS NA 31 2.6 Total Phosphorus (SM4500 P E-1999) Total Phosphorus (as Phosphorus) mg/L NS <0.049 <0.049 0.065 J Cyanide (9014) Cyanide, Total ug/L NS <3.8 <3.8 <3.8 Nitrogen, Total Kjeldahl (SM4500_NH3_C) Nitrogen, Total Kjeldahl mg/L NS 2.8 J 2.2 J <1.7 Notes:

EPA - Environmental Protection Agency SM - Standard Method mg/L - milligrams per liter ug/L - micrograms per liter J - Result is less than the Reporting Limit (RL) but greater than or equal to the Method Detection Limit (MDL) and the concentration is an approximate value.

CFR - Code of Federal Regulations NS - No Standard NA - Not Analyzed CFL - Contains Free Liquid Bold and highlighted concentrations exceed the lowest applicable screening criteria.

Sample ID

Date

Appendix A.

Boring Logs

Client: United States Coast Guard Project Number: 60493645 Site Location: 1100 Abbott Road, Virginia Beach, Virginia Coordinates: Elevation: Sheet: 1 of 1 Drilling Method: Vibracore Monitoring Well Installed: No Sample Type(s): Sediment Core Boring Diameter: 4-inch Screened Interval: NA

Weather: Sunny, Clear; 80 ° F; winds 10-15 mph Logged By: S. Pires Date/Time Started:5/24/16 Depth of Boring:2.0' recovery Drilling Contractor: AquaSurvey, Inc. Ground Elevation: Date/Time Finished:5/24/16 Water Depth: 7.3'

D ep th (f t)

G eo lo gi c sa m pl e

ID

Sa m pl e

D ep th (f t)

B lo w s pe r6

R ec ov er y (in ch es

FI

D

(p pm

U .S

.C .S MATERIALS: Color, size, range, MAIN COMPONENT, minor component(s), moisture content, structure, angularity, maximum grain size, odor, and Geologic Unit (If Known)

La b

Sa m pl e

ID

La b

Sa m pl e

D ep th (F t.)

SW

hydrogen sulfide odor

SM 1.5-2.0' Tan to light brown, Silty SAND, fine-grained, saturated, soft, low plasticity, slight hydrogen sulfide odor

Date Time Depth to groundwater while drilling NOTES: Water depth at time of sampling 7.3'; water depth during hydro survey 3.71'

Used lower water depth to collect samples to -4.5' MLLW

Checked by ___________________________________________Date:________________

0-1.5' Light to dark gray, well-sorted, medium-grained SAND, rounded, saturated, slight SS-1 (Comp)

0-0.79'

BORING ID: SS-1

Site Location: 1100 Abbott Road, Virginia Beach, Virginia Coordinates: Elevation: Sheet: 1 of 1 Drilling Method: Vibracore Monitoring Well Installed: No Sample Type(s): Sediment Core Boring Diameter: 4-inch Screened Interval: NA

Weather: Sunny, Clear; 80 ° F; winds 10-15 mph Logged By: S. Pires Date/Time Started:5/24/16 Depth of Boring:2.3' recovery Drilling Contractor: AquaSurvey, Inc. Ground Elevation: Date/Time Finished:5/24/16 Water Depth: 7.3'

D ep th (f t)

G eo lo gi c sa m pl e

ID

Sa m pl e

D ep th (f t)

B lo w s pe r6

R ec ov er y (in ch es

FI

D

(p pm

U .S

.C .S MATERIALS: Color, size, range, MAIN COMPONENT, minor component(s), moisture content, structure, angularity, maximum grain size, odor, and Geologic Unit (If Known)

La b

Sa m pl e

ID

La b

Sa m pl e

D ep th (F t.)

SW

hydrogen sulfide odor

2 SM

hydrogen sulfide odor

Date Time Depth to groundwater while drilling NOTES: Water depth at time of sampling 7.3'; water depth during hydro survey 3.71'

Used lower water depth to collect samples to -6' MLLW

Checked by ___________________________________________Date:________________

1.5-2.3' Tan to light brown, Silty SAND, fine-grained, saturated, soft, low plasticity, slight

0-1.5' Light to dark gray, well-sorted, medium-grained SAND, rounded, saturated, slight SS-1A (Comp)

0-2.29'

BORING ID: SS-1A

Site Location: 1100 Abbott Road, Virginia Beach, Virginia Coordinates: Elevation: Sheet: 1 of 1 Drilling Method: Vibracore Monitoring Well Installed: No Sample Type(s): Sediment Core Boring Diameter: 4-inch Screened Interval: NA

Weather: Sunny, Clear; 80 ° F; winds 10-15 mph Logged By: S. Pires Date/Time Started:5/24/16 Depth of Boring:2.3' recovery Drilling Contractor: AquaSurvey, Inc. Ground Elevation: Date/Time Finished:5/24/16 Water Depth: 9.3'

D ep th (f t)

G eo lo gi c sa m pl e

ID

Sa m pl e

D ep th (f t)

B lo w s pe r6

R ec ov er y (in ch es

FI

D

(p pm

U .S

.C .S MATERIALS: Color, size, range, MAIN COMPONENT, minor component(s), moisture content, structure, angularity, maximum grain size, odor, and Geologic Unit (If Known)

La b

Sa m pl e

ID

La b

Sa m pl e

D ep th (F t.)

SW

hydrogen sulfide odor

ML

slight hydrogen sulfide odor

2 SW

sulfide odor

CL 2.2-2.3' Dark gray, CLAY, saturated, soft to medium stiff, low to medium plasticity, slight hydrogen sulfide odor

Date Time Depth to groundwater while drilling NOTES: Water depth at time of sampling 9.3'; water depth during hydro survey 7.2'

Used lower water depth to collect samples to -9.5' MLLW

Checked by ___________________________________________Date:________________

1.3-1.8' Dark gray to black, SILT with Organics (wood fragments, peat, shells), saturated, 1.8-2.2' Dark gray, well-sorted, medium-grained SAND, rounded, saturated, slight hydrogen

0-1.3' Dark gray, well-sorted, medium-grained SAND, rounded, saturated, slight SS-2 (Comp)

0-2.3'

BORING ID: SS-2

Site Location: 1100 Abbott Road, Virginia Beach, Virginia Coordinates: Elevation: Sheet: 1 of 1 Drilling Method: Vibracore Monitoring Well Installed: No Sample Type(s): Sediment Core Boring Diameter: 4-inch Screened Interval: NA

Weather: Sunny, Clear; 80 ° F; winds 10-15 mph Logged By: S. Pires Date/Time Started:5/24/16 Depth of Boring:4.0' recovery Drilling Contractor: AquaSurvey, Inc. Ground Elevation: Date/Time Finished:5/24/16 Water Depth: 14.2'

D ep th (f t)

G eo lo gi c sa m pl e

ID

Sa m pl e

D ep th (f t)

B lo w s pe r6

R ec ov er y (in ch es

FI

D

(p pm

U .S

.C .S MATERIALS: Color, size, range, MAIN COMPONENT, minor component(s), moisture content, structure, angularity, maximum grain size, odor, and Geologic Unit (If Known)

La b

Sa m pl e

ID

La b

Sa m pl e

D ep th (F t.)

SM

SM

SW

hydrogen sulfide odor

SM

2 increasing Silt content with depth, saturated, slight hydrogen sulfide odor

SM 2.4-4.0' Same As Above

Date Time Depth to groundwater while drilling NOTES: Water depth at time of sampling 14.2'; water depth during hydro survey 9.11'

Used lower water depth to collect samples to -12.5' MLLW

Checked by ___________________________________________Date:________________

0-3.9'

0.6-1.0' Light gray, Silty SAND, saturated, soft, slight hydrogen sulfide odor

1.4-2.4' Tan, Silty SAND with trace Organics (wood fragments, peat, shells) throughout, 1.0-1.4' Light brown, well-sorted, medium-grained SAND, rounded, saturated, slight

0-0.6' Light gray, Sandy SILT, saturated, soft, slight hydrogen sulfide odor SS-3 (Comp)

BORING ID: SS-3

Appendix B.

Laboratory Analytical and Grain Size Analysis Reports

ANALYTICAL REPORT

Job Number: 180-55126-1

Job Description: USCG Station Barnegat Light and Little C

For:

AECOM Technical Services Inc.

10 Patewood Drive Building VI, Suite 500 Greenville, SC 29615

Attention: Ms. Robin McCauley

Approved for release.

Carrie L Gamber Senior Project Manager

6/22/2016 8:24 AM

Carrie L Gamber, Senior Project Manager 301 Alpha Drive, Pittsburgh, PA, 15238

(412)963-2428 carrie.gamber@testamericainc.com

06/22/2016

The test results in this report meet all NELAP requirements for parameters for which accreditation is required or available. Any exceptions to the NELAP requirements are noted in this report. Pursuant to NELAP, this report may not be reproduced, except in full, without the written approval of the laboratory. This report is confidential and is intended for the sole use of TestAmerica and its client. All questions regarding this report should be directed to the TestAmerica Project Manager or designee who has signed this report.

TestAmerica Laboratories, Inc.

TestAmerica Pittsburgh 301 Alpha Drive, RIDC Park, Pittsburgh, PA 15238

Tel (412) 963-7058 Fax (412) 963-2468 www.testamericainc.com mailto:carrie.gamber@testamericainc.com http://www.testamericainc.com http://

Table of Contents Cover Title Page

Data Summaries

Definitions

Case Narrative

Detection Summary

Client Sample Results

Default Detection Limits

Surrogate Summary

QC Sample Results

QC Association

Chronicle

Certification Summary

Method Summary

Sample Summary

Detection Limit Exceptions

Manual Integration Summary

Reagent Traceability

COAs

Organic Sample Data

GC/MS VOA

Method 8260C Method 8260C QC Summary Method 8260C Sample Data Standards Data

Method 8260C ICAL Data Method 8260C CCAL Data

Raw QC Data

Method 8260C Tune Data Method 8260C Blank Data Method 8260C LCS/LCSD Data

Method 8260C Run Logs Method 8260C Prep Data

GC/MS Semi VOA

Method 8270D Method 8270D QC Summary Method 8270D Sample Data Standards Data

Method 8270D ICAL Data Method 8270D CCAL Data

Raw QC Data Method 8270D Tune Data Method 8270D Blank Data Method 8270D LCS/LCSD Data

Method 8270D Run Logs Method 8270D Prep Data

Method 8270D Low Level Method 8270D Low Level QC Summary Method 8270D Low Level Sample Data Standards Data

Method 8270D Low Level ICAL Data Method 8270D Low Level CCAL Data

Raw QC Data

Method 8270D Low Level Tune Data Method 8270D Low Level Blank Data Method 8270D Low Level LCS/LCSD Data

Method 8270D Low Level Run Logs Method 8270D Low Level Prep Data

GC Semi VOA

Method 8081B Low Level Method 8081B Low Level QC Summary Method 8081B Low Level Sample Data Standards Data

Method 8081B Low Level ICAL Data Method 8081B Low Level Resolution Data Method 8081B Low Level PEM Data Method 8081B Low Level CCAL Data Method 8081B Low Level GPC Data

Raw QC Data Method 8081B Low Level Blank Data Method 8081B Low Level LCS/LCSD Data Method 8081B Low Level MS/MSD Data

Method 8081B Low Level Run Logs Method 8081B Low Level Prep Data

Method 8081B Method 8081B QC Summary Method 8081B Sample Data Standards Data

Method 8081B ICAL Data

Method…