ATTACHMENT J.1.7. - APPENDIX F.pdf

Appendix F Sediment Sampling & Analysis Report (July

2021)

{ENV Dept LLC/871/01918925.DOCX: }

Environmental Analysis with Hydrologic Simulation Model & Debris Diverter Functionality Evaluation at US Coast Guard Station Owensboro Ohio River – Owensboro, Kentucky

Sediment Sampling and Analysis Report Prepared for:

United States Coast Guard

Civil Engineering Unit Miami

15608 S.W. 117th Avenue

Miami, Florida 33177-1630

Prepared by:

AECOM

3101 Wilson Blvd.

Arlington, Virginia 22201

AECOM Project Number: 60653495

USCG Project Number: 14767343

Delivery Order Number: 70Z082-21FPMV08800

August 2021

Sediment Sampling and Analysis Report

US Coast Guard Station Owensboro

Owensboro, KY ii

Quality Information:

Prepared by

Jennifer Jones Environmental Lead jennifer.jones@aecom.com

919-461-1442

Reviewed by

Jennifer Solakian

Project Manager jennifer.solakian@aecom.com

703-682-0862

Prepared for:

United States Coast Guard

Civil Engineering Unit Miami

15608 S.W. 117th Avenue

Miami, Florida 33177-1630

Prepared by:

AECOM

3101 Wilson Blvd.

Arlington, Virginia 22201 www.aecom.com

Copyright © 2021 by AECOM

All rights reserved. No part of this copyrighted work may be reproduced, distributed, or transmitted in any form or by any means without the prior written permission of AECOM.

mailto:jennifer.jones@aecom.com mailto:jennifer.solakian@aecom.com http://www.aecom.com/ iii

Table of Contents

Introduction ............................................................................................................................................... 1-1

Sediment Sampling and Analysis ............................................................................................................... 2-1

2.1 Sediment Sampling ........................................................................................................................ 2-1

2.2 Analytical Results ........................................................................................................................... 2-2

Disposal Site Coordination ........................................................................................................................ 3-1

Summary .................................................................................................................................................. 4-1

List of Figures

Figure 1 Dredge Site – Aerial Overview

Figure 2 Sediment Sample Location Map

List of Tables

Table 1 Summary of Sediment Analytical Results – PCBs

Table 2 Summary of Sediment Analytical Results – TCLP

Table 3 Summary of Physical Characteristics – Sediment

List of Appendices

Appendix A. Boring Logs

Appendix B. Laboratory Analytical Report

1-1

Introduction

The objective of the project is to provide pre-dredging services at the United States Coast Guard (USCG) Station

Owensboro located at 3301 East 4th Street, Owensboro, Daviess County, Kentucky; latitude: North 37.787232°;

longitude: West -87.074075°. The Station is located northeast of the city center of Owensboro along the Kentucky shoreline of the Ohio River (Figure 1). The boat basin is located on the northwestern side of the Station. The current water features include a fixed and floating pier, a gangway, and a debris deflector in addition to piers and mooring dolphins.

Due to natural sediment deposition, there is not sufficient draft for the USCG Cutter Obion to transit, moor and execute operational missions. The proposed dredging is necessary to ensure that the boat basin and moorings at

Station Owensboro are dredged to previous depths to allow for sufficient draft of the vessel. The maintenance dredging project will involve dredging to the designed navigable elevation of 348.0 feet Ohio River Datum (ORD) with two feet of allowable over dredge depth (346.0 feet ORD) within the extent of the dredge limits.

AECOM Technical Services, Inc. (AECOM) conducted sediment sampling within the Station Owensboro boat basin and moorings to obtain samples for chemical and physical analyses for waste characterization and proper disposal of the dredged sediment. Based upon review of offsite disposal options, the USCG has selected the West Daviess

County Landfill located in Owensboro, Kentucky as the disposal site for the proposed maintenance dredging project at USCG Station Owensboro. The sediment sampling and analysis was performed in accordance with the requirements of the West Daviess County Landfill and the Kentucky Department for Environmental Protection

(KYDEP) for disposal at the landfill. The West Daviess County Landfill is a contained landfill and specific laboratory analysis is required to determine whether the dredge material meets the acceptance criteria for disposal at the landfill.

This report documents the sediment sampling activities and summarizes the chemical and physical data results for the sediment core samples collected within the proposed dredge area footprint. Additionally, the current status of

AECOM’s coordination efforts with the West Daviess County Landfill are summarized herein.

The layout of the boat basin and moorings, the extent of the proposed dredge area footprint, the sediment sampling locations as sampled in the field, and the March 2021 hydrographic survey contour elevations, are shown on Figure

2.

2-1

Sediment Sampling and Analysis

The sediment sampling was conducted by a sub-consultant (Aqua Survey, Inc.) under the direction of AECOM on

July 21, 2021. The purpose of the investigation was to obtain sediment samples at Station Owensboro within the proposed dredge area footprint for chemical and physical analyses and waste characterization. The sediment samples were collected utilizing a high powered electro-vibracoring system as described in Section 2.1 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 in order to meet the West Daviess County Landfill’s evaluation and acceptance determination requirements for disposal of the dredge material at the landfill.

In accordance with the USCG approved Revised Soil Sampling and Analysis Plan (SAP)1, three individual sediment core samples (SS-1, SS-2, and SS-3) were collected from three different locations within the dredge area footprint.

Each individual sediment core sample was analyzed in accordance with the SAP and the selected disposal facility’s acceptance criteria (i.e., West Daviess County Landfill). Three composite samples (SS-1, SS-2, and SS-3) were properly preserved and shipped under chain of custody to Eurofins TestAmerica in Savannah, Georgia for chemical and physical analyses. The sediment samples were analyzed for the parameters listed in the following table:

Toxicity Characteristic Leaching Procedure (TCLP)

Metals (USEPA Method Solid Waste [SW]-846 TCLP

Extraction 1311/6010C/7470A)

TCLP Volatile Organic Compounds (VOCs) (USEPA

Method SW-846 TCLP Extraction 1311/8260B)

TCLP Semi-Volatile Organic Compounds (SVOCs)

(USEPA Method SW-846 TCLP Extraction 1311/8270D)

TCLP Pesticides (USEPA Method SW-846 TCLP

Extraction 1311/8081B)

TCLP Herbicides (USEPA Method SW-846 TCLP

Extraction 1311/8151A)

Polychlorinated Biphenyls (PCBs) (USEPA Method

8082A)

Paint Filter Liquids Test (USEPA Method 9095B) Percent Solids and Percent Moisture (Standard

Method [SM] 2540G) pH (Corrosivity) (SW-846 9045D) Ignitability (SW-846 1030)

Total Cyanide (SW-846 9012B) Sulfide (SW-846 9034)

2.1 Sediment Sampling

Three sediment sampling locations (SS-1, SS-2, and SS-3) were located within the proposed dredge area footprint identified on Figure 2. One individual sediment core sample was collected and composited at each sampling location for a total of three samples (SS-1, SS-2, and SS-3). Additionally, one duplicate sample (DUP-1) was collected from

SS-2.

The three composite sediment samples (SS-1, SS-2, and SS-3) were collected at depths up to 4.0, 10.0, and 4.8 feet below the surface of the sediment, respectively. 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 core liner 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

1 Environmental Analysis with Hydrologic Simulation Model & Debris Diverter Functionality Evaluation, Revised Soil Sampling and

Analysis Plan, US Coast Guard Station Owensboro, Ohio River, Owensboro, Kentucky (June 2021)

2-2 analyses. The sediment samples were classified using the Unified Soil Classification System. Generally, the sediment samples consisted of dark grayish brown silty fine-grained sand (SM). At SS-2, the sediment graded to dark grayish brown silty clay (CH) from approximately 1.0 to 6.0 feet and dark grayish brown fine-grained sand (SP) from approximately 6.0 to 6.2 feet. Organic matter (wood fragments, root material) was observed throughout each core sample and trace organics (shell fragments) were observed from approximately 6.2 to 8.0 feet at SS-2. No petroleum odor or sheen was observed at the sediment sample locations. It should also be noted that during the drilling activities, the vibracore encountered refusal at various depths within the proposed dredge area footprint and multiple offset locations were necessary for each sampling station due to significant tree debris. At each sampling station (i.e., SS-1, SS-2, and SS-3), the sediment core sample was collected from the location with the deepest penetration depth. Boring logs are contained in Appendix A.

2.2 Analytical Results

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

− Kentucky Administrative Regulations (KAR) Title 401 Chapter 47 Part 030 (401 KAR 47:030), Environmental

Performance Standards

− USEPA TCLP Regulatory Levels

Tables 1 through 3 summarize the results of the sediment analyses.

PCBs were not detected above the method detection limits (MDLs) in any of the sediment samples collected.

Concentrations of TCLP Metals (barium) were detected in sediment samples SS-2 and DUP-01 at concentrations above the MDL but below the USEPA TCLP regulatory level. No other metals were detected at concentrations above the MDLs. TCLP Pesticides, TCLP Herbicides, TCLP VOCs, and TCLP SVOCs were not detected above the MDLs.

No constituents exceeded the USEPA TCLP regulatory levels. Based on the TCLP results, the sediment is characterized as non-hazardous waste.

The pH of sediment samples SS-1, SS-2, and SS-3 were 7.2, 7.9, and 7.2, respectively. These values are between 2 and 12.5 indicating that the dredged spoils can be classified as non-corrosive. The sediment samples did not ignite during the burn rate test indicating that the material can be classified as non-ignitable. Concentrations of sulfide were not detected above the MDLs. Concentrations of total cyanide were detected in sediment samples SS-1, SS-2, and

SS-3 at concentrations above the MDLs; however, cyanide was analyzed to test for reactivity only and the MDL exceedances will not affect the results for disposal. The USEPA 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 hazardous waste characteristics above any established regulatory levels for the parameters for which the USEPA have prescribed limits and methodology.

The percent moisture results for sediment samples SS-1, SS-2, and SS-3 ranged from 24 percent to 34 percent and the percent solids results ranged from 66 to 76 percent. Each of the in-situ sediment samples passed the paint filter liquids test.

3-1

Disposal Site Coordination

Based upon the results of AECOM’s previous disposal site evaluation, the USCG has selected the West Daviess

County Landfill located at 7772 KY-815, Owensboro, Kentucky as the disposal site for the proposed maintenance dredging project at USCG Station Owensboro. Pre-approval is required from the landfill prior to disposal of the dredge material at the West Daviess County Landfill.

AECOM has initiated coordination efforts with the West Daviess County Landfill to obtain an acceptance determination for disposal of the dredge material. Upon review and evaluation of the laboratory analytical results, AECOM completed the landfill required Waste Application Form (preliminary) and submitted it to the landfill along with the in-situ sediment sampling analytical results for their review and formal approval (i.e., acceptance determination).

We are currently awaiting the landfill’s response.

4-1

Summary

AECOM collected three individual sediment core samples from three locations within the proposed dredging area at the Station Owensboro boat basin. The sediment samples collected indicate that the sediment consists predominantly of silty fine-grained 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: TCLP metals, VOCs, SVOCs, pesticides, and herbicides; PCBs; reactivity (total cyanide and sulfide), corrosivity, and ignitability; percent moisture;

percent solids; and the paint filter liquids test.

The results of the chemical analysis indicate that the sediment samples were below the MDLs and the Environmental

Performance Standards for disposal in a contained landfill. The TCLP results were below either the MDLs or the

USEPA TCLP regulatory levels. Based on the TCLP results, the sediment is characterized as non-hazardous waste.

The sediment can be characterized as non-corrosive and non-ignitable. Each of the sediment samples passed the paint filter liquids test. The sediment sample results did not indicate hazardous waste characteristics above any established regulatory levels for the parameters for which the USEPA have prescribed limits and methodology.

Based upon the results of the chemical and physical analyses, it is anticipated that the dredge material can be disposed of at the West Daviess County Landfill in Owensboro, Kentucky. Pre-approval is required from the landfill prior to disposal of the dredge material at the West Daviess County Landfill. AECOM has initiated coordination efforts with the West Daviess County Landfill and has submitted the laboratory analytical results and a preliminary copy of the Waste Application Form to the landfill for review and evaluation. AECOM will work with the disposal facility’s representative to finalize the Waste Application Form and obtain formal waste disposal approval. The waste application form and disposal approval will be presented under separate cover.

Figures

Environmental Analysis with Hydrologic Simulation Model

USCG Station Owensboro 3301 East 4th Street

Owensboro, Kentucky

Dredge Site – Aerial Overview

(Source: Google Earth)

FIGURE

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OHIO RIVER

NAV SEC 13

. . . . . APPROXIMATE DREDGE LIMITS

. . . . . SURVEY LIMITS

1. THE INFORMATION DEPICTED ON THIS SURVEY MAP

REPRESENTS THE RESULTS OF A HYDROGRAPHIC SURVEY

PERFORMED BY AECOM TECHNICAL SERVICES, INC.,

PERFORMED ON MARCH 18TH, 2021. THE CONDITIONS

SHOWN ON THIS SURVEY ARE SUBJECT TO RAPID CHANGE

DUE TO CHANGING EVENTS, AND CAN ONLY BE

CONSIDERED A REPRESENTATION OF SITE CONDITIONS AT

THAT TIME.

2. SITE SURVEYED WITH SONARMITE SINGLE-BEAM

ECHOSUNDER SYSTEM BY OHMEX LTD AND USING RTK

GNSS HORIZONTAL POSITIONING EQUIPMENT.

3. COORDINATES REFERENCE STATE PLANE KENTUCKY

SOUTH, NAD83 (US FEET).

4. ELEVATIONS ARE IN FEET AND REFER TO THE OHIO RIVER

DATUM 1913 (ORD).

5. ALL AREAS IDENTIFIED AS OBSTRUCTED, ELEVATIONS

WERE ESTIMATED USING INTERPOLATED DATA FROM

SURROUNDING DATA AND VALIDATED USING 10

NOVEMBER 2020 HYDROGRAPHIC SURVEY INFORMATION

SHOWN ON "OHIO RIVER MILE 754.4 USCG O'BION DOCK

BEFORE DREDGE SURVEY 10 NOV. 2020" PREPARED BY US

ARMY CORPS OF ENGINEERS.

6. OHIO RIVER DATUM = NAVD88 + 0.91-FT.

7. NORMAL POOL ELEVATION = 358 ORD.

8. PROJECT BENCHMARK: NAV SEC 13, A US ARMY CORP OF

ENGINEERS (ACOE) BRASS CONTROL DISK LOCATED

N-SITE, NORTHING 217,365.23(SFT), EASTING 1,257,981.14

(SFT), ORTHO HEIGHT 397.63 (ORD) (FEET).

USCG CONCRETE DOCK

EXISTING GANGWAY

APPROXIMATE DREGE AREA

SURVEY LIMITS

DEBRIS DIVERTOR

(DAMAGED)

48" MOORING DOLPHIN

(TYP.)

48" MOORING DOLPHIN

(TYP.)

LOGS AND

DEBRIS

MAIN PIER

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TOP OF BANK

CONCRETE

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KEYMAP:

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40'20'0'

OWENSBORO STATION

. . . . . SEDIMENT CORE SAMPLE LOCATION (SEE TABLE)

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ENV. ANALYSIS WITH HYDROLOGIC SIM. MODEL

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CG STATION OWENSBORO

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OWENSBORO

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KY

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STATION OWENSBORO

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C14767343V001.DWG

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CIVIL ENGINEERING UNIT MIAMI

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15608 SW 117 AVE

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MIAMI, FL 33177

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EVA I. PORRAS

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HH

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MS

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AECOM

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ARLINGTON, VA

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(703) 247-2957

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Tables

Table 1

Summary of Sediment Analytical Results - PCBs

USCG STA Owensboro, Owensboro, Kentucky

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

0-4.0 0-10.0 0-4.8 0-10.0

7/21/21 7/21/21 7/21/21 7/21/21

Constituent Units KY Environmental

Performance Standards

Polychlorinated Biphenyls (EPA Method 8082A)

PCB-1016 mg/kg 49 <0.0080 <0.0082 <0.0096 <0.0083

PCB-1221 mg/kg 49 <0.011 <0.011 <0.013 <0.011

PCB-1232 mg/kg 49 <0.0038 <0.0039 <0.0046 <0.0039

PCB-1242 mg/kg 49 <0.0036 <0.0037 <0.0044 <0.0038

PCB-1248 mg/kg 49 <0.0059 <0.0061 <0.0072 <0.0062

PCB-1254 mg/kg 49 <0.0072 <0.0074 <0.0088 <0.0075

PCB-1260 mg/kg 49 <0.0069 <0.0071 <0.0084 <0.0072

Notes:

Kentucky Energy and Environment Cabinet - Department for Environmental Protection

EPA - Environmental Protection Agency mg/kg - milligrams per kilogram

Detected compounds are shown in Bold. Bold and highlighted concentrations exceed the lowest applicable screening criteria.

KY Environmental Performance Standards

Sample ID

Sample Interval Depth (feet)

Date

Kentucky Administrative Regulations (KAR) Title 401 Chapter 47 Part 030 (401 KAR 47:030), Environmental Performance Standards

Table 2

Summary of Sediment Analytical Results - TCLP

USCG STA Owensboro, Owensboro, Kentucky

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

0-4.0 0-10.0 0-4.8 0-10.0

7/21/21 7/21/21 7/21/21 7/21/21

Arsenic mg/L <5 <0.20 <0.20 <0.20 <0.20

Barium mg/L <100 <1.0 1.0 <1.0 1.2

Cadmium mg/L <1 <0.10 <0.10 <0.10 <0.10

Chromium mg/L <5 <0.20 <0.20 <0.20 <0.20

Lead mg/L <5 <0.20 <0.20 <0.20 <0.20

Selenium mg/L <1 <0.50 <0.50 <0.50 <0.50

Silver mg/L <5 <0.10 <0.10 <0.10 <0.10

Mercury mg/L <0.2 <0.020 <0.020 <0.020 <0.020

Pesticides, TCLP (EPA Method 8081B/1311)

Chlordane mg/L <0.03 <0.00080 <0.00080 <0.00080 <0.00080

Endrin mg/L <0.02 <0.00000050 <0.00000050 <0.00000050 <0.00000050 gamma-BHC (Lindane) mg/L <0.4 <0.00000050 <0.00000050 <0.00000050 <0.00000050

Heptachlor mg/L <0.008 <0.00000050 <0.00000050 <0.00000050 <0.00000050

Heptachlor epoxide mg/L <0.008 <0.0000010 <0.0000010 <0.0000010 <0.0000010

Methoxychlor mg/L <10 <0.0000010 <0.0000010 <0.0000010 <0.0000010

Toxaphene mg/L <0.5 <0.0016 <0.0016 <0.0016 <0.0016

Herbicides, TCLP (EPA Method 8151A/1311)

2,4-D mg/L <10 <0.0052 <0.0052 <0.0052 <0.0052

Silvex (2,4,5-TP) mg/L <1 <0.0021 <0.0021 <0.0021 <0.0021

Benzene mg/L <0.5 <0.0086 <0.0086 <0.0086 <0.0086

2-Butanone (MEK) mg/L <200 <0.068 <0.068 <0.068 <0.068

Carbon tetrachloride mg/L <0.5 <0.0066 <0.0066 <0.0066 <0.0066

Chlorobenzene mg/L <100 <0.0052 <0.0052 <0.0052 <0.0052

Chloroform mg/L <6 <0.010 <0.010 <0.010 <0.010

1,2-Dichloroethane mg/L <0.5 <0.010 <0.010 <0.010 <0.010

1,1-Dichloroethene mg/L <0.7 <0.0072 <0.0072 <0.0072 <0.0072

Tetrachloroethene mg/L <0.7 <0.015 <0.015 <0.015 <0.015

Trichloroethene mg/L <0.5 <0.0096 <0.0096 <0.0096 <0.0096

Vinyl chloride mg/L <0.2 <0.010 <0.010 <0.010 <0.010

1,4-Dichlorobenzene mg/L <7.5 <0.0027 <0.0027 <0.0027 <0.0027

2,4,5-Trichlorophenol mg/L <400 <0.0060 <0.0059 <0.0060 <0.0060

2,4,6-Trichlorophenol mg/L <2 <0.0043 <0.0043 <0.0043 <0.0043

2,4-Dinitrotoluene mg/L <0.13 <0.0060 <0.0059 <0.0060 <0.0060

2-Methylphenol (o-Cresol) mg/L <200 <0.0045 <0.0045 <0.0045 <0.0045

3 & 4-Methylphenol* (m & p-Cresol) mg/L <200 <0.0065 <0.0064 <0.0065 <0.0065

Hexachlorobenzene mg/L <0.13 <0.0040 <0.0040 <0.0040 <0.0040

Hexachlorobutadiene mg/L <0.5 <0.0031 <0.0031 <0.0031 <0.0031

Hexachloroethane mg/L <3 <0.0038 <0.0038 <0.0038 <0.0038

Nitrobenzene mg/L <2 <0.0037 <0.0037 <0.0037 <0.0037

Pentachlorophenol mg/L <100 <0.010 <0.0099 <0.010 <0.010

Pyridine mg/L <5 <0.012 <0.012 <0.012 <0.012

Notes:

EPA - Environmental Protection Agency

TCLP - Toxicity Characteristic Leaching Procedure

TCLP Regulatory Level mg/L - milligrams per liter

* - 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.

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

Sample ID

Sample Interval Depth (feet)

Date

Mercury, TCLP (EPA Method 7470A/1311)

Volatile Organic Compounds, TCLP (EPA Method 8260B/1311)

Metals, TCLP (EPA Method 6010C/1311)

UnitsConstituent

TCLP Regulatory

Level

Table 3

Summary of Physical Characteristics - Sediment

USCG STA Owensboro, Owensboro, Kentucky

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

0-4.0 0-10.0 0-4.8 0-10.0

7/21/21 7/21/21 7/21/21 7/21/21

Constituent Units USEPA Regulatory

Level

Percent Moisture % NS 24 H 32 H 34 H NA

Percent Solids % NS 76 H 68 H 66 H NA pH Soil (9045D) pH S.U. pH < 2 or > 12.5 7.2 HF 7.9 HF 7.2 HF NA

Temperature (9045D)

Temperature °C NS 18.2 HF 18.0 HF 18.1 HF NA

Cyanide (9012B)

Cyanide, Total mg/kg NS 0.073 J H 0.11 H 0.18 H F1 F2 NA

Sulfide (9034)

Sulfide mg/kg NS <56 H <59 H <59 H NA

Ignitability (1030)

Ignitability mm/sec Burn Rate >2.2 mm/sec NB NB NB NA

Paint Filter Liquids Test (9095B)

Free Liquids -- CFL/CNF CNF CNF CNF CNF

Notes:

USEPA - United States Environmental Protection Agency

% - percent mg/kg - milligrams per kilogram mm/sec - millimeters per second

S.U. - Standard Units

°C - degrees Celsius

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.

H - Sample was prepped or analyzed beyond the specified holding time.

HF - Field parameter with a holding time of 15 minutes. Test performed by laboratory at client's request.

F1 - Matrix Spike (MS) and/or Matrix Spike Duplicate (MSD) recovery exceeds control limits.

F2 - MS/MSD Relative Percent Difference (RPD) exceeds control limits.

NS - No Standard

NA - Not Analyzed

NB - No Burn (sample did not ignite)

CFL - Contains Free Liquid

CNF - Contains No Free Liquid

Bold and highlighted concentrations exceed the applicable screening criteria.

Percent Solids (2540G)

Date

Sample Interval Depth (feet)

Sample ID

Percent Moisture (2540G)

Appendix A. Boring Logs

Client: United States Coast Guard

Project Number: 60653495

Site Location: 3301 East 4th Street, Owensboro, Kentucky

Coordinates: N 2172515.73 / E 1257836.72; N 37.7873926 / W -87.0739096

Water Surface Elevation: 360.6 ft ORD Sheet: 1 of 1

Drilling Method: Vibracore Monitoring Well Installed: N/A

Sample Type(s): Sediment Core Boring Diameter: 4-inch Screened Interval: NA

Weather: Clear; 83 ° F Depth of Boring: 4.0'

Drilling Contractor: AquaSurvey, Inc. Elevation: Water Depth: 10.4'

D ep th ft

G eo lo g ic s am p le

I D

S am p le

D ep th ft

B lo w s p er

R ec o v er y in ch es

F

ID

p p m

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)

L ab

S am p le

I D

L ab

S am p le

D ep th

F t.

SM

organics (wood fragments, root material), moderate to slight organic hydrogen sulfide) odor

End of core at 4.0' below sediment surface; terminated at refusal depth

Date Time Depth to groundwater while drilling

NOTES: - Sediment surface elevation 350.2' ORD

- Bottom of core elevation 346.2' ORD

- Difference between penetration and recovery is interpreted to be due to compaction of sediment within the sample barrel during vibracore activities.

- Attempted 3 offset locations in vicinity of proposed SS-1 location; however, vibracore refusal was encountered due to solid layer of tree debris. Sample was collected from location with deepest penetration depth.

Checked by ___________________________________________Date:________________

0-2.5' Dark grayish brown, Silty SAND, fine-grained, loose, saturated, moderate

SS-1

(Comp)

0-2.5'

Logged By: Sam Lillard Date/Time Started: 7/21/21

Date/Time Finished:7/21/21 1330

BORING ID: SS-1

Site Location: 3301 East 4th Street, Owensboro, Kentucky

Coordinates: N 2172391.97 / E 1257737.51; N 37.7870490 / W -87.0742469

Water Surface Elevation: 360.6' ORD Sheet: 1 of 1

Drilling Method: Vibracore Monitoring Well Installed: N/A

Sample Type(s): Sediment Core Boring Diameter: 4-inch Screened Interval: NA

Weather: Clear; 83 ° F Date/Time Started: 7/21/21 1408 Depth of Boring: 10.0'

Drilling Contractor: AquaSurvey, Inc. Elevation: Water Depth: 4.7'

D ep th ft

G eo lo g ic s am p le

I D

S am p le

D ep th ft

B lo w s p er

R ec o v er y in ch es

F

ID

p p m

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)

L ab

S am p le

I D

L ab

S am p le

D ep th

F t.

0.5 SM

organic (hydrogen sulfide) odor

1.0

1.5

2.0

2.5

3.0

CH 1.0-6.0' Dark grayish brown, Silty CLAY, cohesive, soft, wet, moderate

3.5 organics (wood fragments, root material) at 3'

4.0

4.5

5.0

5.5

6.0

SP

6.5

SM

7.0 (wood fragments, root material), moderate (hydrogen sulfide) odor, trace shell fragments

7.5 material)

8.0

8.5

9.0

9.5

End of core at 10.0' below sediment surface; terminated at refusal depth

Date Time Depth to groundwater while drilling

NOTES: - Sediment surface elevation 355.9' ORD

- Bottom of core elevation 345.9' ORD

- Difference between penetration and recovery is interpreted to be due to compaction of sediment within the sample barrel during vibracore activities.

- Attempted 2 offset locations in vicinity of proposed SS-2 location; however, vibracore refusal was encountered due to solid layer of tree debris. Sample was collected from the 3rd offset location; no refusal

- DUP-1 collected from sediment sample location SS-2

Checked by ___________________________________________Date:________________

SS-2

(Comp)

0-8.0'

6-6.2' Dark grayish brown, SAND, fine-grained, loose, wet, moderate organics at 6'

6.2-8.0' Dark grayish brown, Silty SAND, fine-grained, loose, wet, moderate organics

7.0-7.3' Dark blackish gray Silty SAND, heavy organics (wood fragments, root

Date/Time Finished:7/21/21 1420

Logged By: Sam Lillard

0-1.0' Dark grayish brown, Silty SAND, fine-grained, loose, saturated, moderate

BORING ID: SS-2

Site Location: 3301 East 4th Street, Owensboro, Kentucky

Coordinates: N 2172473.60 / E 1257852.56; N 37.7872775 / W -87.0738527

Water Surface Elevation: 360.6' ORD Sheet: 1 of 1

Drilling Method: Vibracore Monitoring Well Installed: N/A

Sample Type(s): Sediment Core Boring Diameter: 4-inch Screened Interval: NA

Weather: Clear; 83 ° F Depth of Boring: 4.8'

Drilling Contractor: AquaSurvey, Inc. Elevation: Water Depth: 3.5'

D ep th ft

G eo lo g ic s am p le

I D

S am p le

D ep th ft

B lo w s p er

R ec o v er y in ch es

F

ID

p p m

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)

L ab

S am p le

I D

L ab

S am p le

D ep th

F t.

SM

organics (wood fragments, root material), moderate organic (hydrogen sulfide) odor

SM 1.0-3.2' Dark grayish brown, Silty SAND, fine-grained, loose, saturated, heavy organics (wood fragments, root material)

5 End of core at 4.8' below sediment surface; terminated at refusal depth

Date Time Depth to groundwater while drilling

NOTES: - Sediment surface elevation 357.1' ORD

- Bottom of core elevation 352.3' ORD

- Difference between penetration and recovery is interpreted to be due to compaction of sediment within the sample barrel during vibracore activities.

- Attempted 4 offset locations in vicinity of proposed SS-3 location; however, vibracore refusal was encountered due to solid layer of tree debris. Sample was collected from location with deepest penetration depth.

Checked by ___________________________________________Date:________________

Logged By: Sam Lillard 1505

0-1.0' Dark grayish brown, Silty SAND, fine-grained, loose, saturated, moderate

SS-3

(Comp)

0-3.2'

Date/Time Finished:7/21/21 1530

Date/Time Started: 7/21/21

BORING ID: SS-3

Appendix B. Laboratory Analytical Reports

ANALYTICAL REPORT

Eurofins TestAmerica, Savannah 5102 LaRoche Avenue Savannah, GA 31404 Tel: (912)354-7858

Laboratory Job ID: 680-201851-1 Client Project/Site: U.S. Coast Guard District 8 Dredging Pro

For:

AECOM Technical Services Inc.

1600 Perimeter Park Dr 400 Morrisville, North Carolina 27560

Attn: Jennifer Jones

Authorized for release by:

8/11/2021 5:25:02 PM

Jerry Lanier, Project Manager I (912)250-0281 Jerry.Lanier@Eurofinset.com

The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page.

This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature.

Results relate only to the items tested and the sample(s) as received by the laboratory.

https://secure.testamericainc.com/TotalAccess/login.aspx http://www.testamericainc.com/services-we-offer/ask-the-expert http://www.eurofinsus.com/Env mailto:Jerry.Lanier@Eurofinset.com

Definitions/Glossary Job ID: 680-201851-1Client: AECOM Technical Services Inc.

Project/Site: U.S. Coast Guard District 8 Dredging Pro

Qualifiers

GC/MS VOA

Qualifier Description

U Indicates the analyte was analyzed for but not detected.

Qualifier

GC/MS Semi VOA Qualifier Description

U Indicates the analyte was analyzed for but not detected.

Qualifier

GC Semi VOA Qualifier Description

J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

Qualifier p The %RPD between the primary and confirmation column/detector is >40%. The lower value has been reported.

S1- Surrogate recovery exceeds control limits, low biased.

U Indicates the analyte was analyzed for but not detected.

Metals Qualifier Description

U Indicates the analyte was analyzed for but not detected.

Qualifier

General Chemistry Qualifier Description

F1 MS and/or MSD recovery exceeds control limits.

Qualifier

F2 MS/MSD RPD exceeds control limits

H Sample was prepped or analyzed beyond the specified holding time

HF Field parameter with a holding time of 15 minutes. Test performed by laboratory at client's request.

J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

U Indicates the analyte was analyzed for but not detected.

Glossary

These commonly used abbreviations may or may not be present in this report.

¤ Listed under the "D" column to designate that the result is reported on a dry weight basis

Abbreviation

%R Percent Recovery

CFL Contains Free Liquid

CFU Colony Forming Unit

CNF Contains No Free Liquid

DER Duplicate Error Ratio (normalized absolute difference)

Dil Fac Dilution Factor

DL Detection Limit (DoD/DOE)

DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample

DLC Decision Level Concentration (Radiochemistry)

EDL Estimated Detection Limit (Dioxin)

LOD Limit of Detection (DoD/DOE)

LOQ Limit of Quantitation (DoD/DOE)

MCL EPA recommended "Maximum Contaminant Level"

MDA Minimum Detectable Activity (Radiochemistry)

MDC Minimum Detectable Concentration (Radiochemistry)

MDL Method Detection Limit

ML Minimum Level (Dioxin)

MPN Most Probable Number

MQL Method Quantitation Limit

NC Not Calculated

ND Not Detected at the reporting limit (or MDL or EDL if shown)

NEG Negative / Absent

POS Positive / Present

PQL Practical Quantitation Limit

PRES Presumptive

QC Quality Control

Eurofins TestAmerica, Savannah

Page 2 of 53 8/11/2021

Definitions/Glossary

Project/Site: U.S. Coast Guard District 8 Dredging Pro

Glossary (Continued)

These commonly used abbreviations may or may not be present in this report.

RER Relative Error Ratio (Radiochemistry)

Abbreviation

RL Reporting Limit or Requested Limit (Radiochemistry)

RPD Relative Percent Difference, a measure of the relative difference between two points

TEF Toxicity Equivalent Factor (Dioxin)

TEQ Toxicity Equivalent Quotient (Dioxin)

TNTC Too Numerous To Count

Eurofins TestAmerica, Savannah

Page 3 of 53 8/11/2021

Sample Summary Client: AECOM Technical Services Inc. Job ID: 680-201851-1

Project/Site: U.S. Coast Guard District 8 Dredging Pro

Lab Sample ID Client Sample ID Matrix Collected Received

680-201851-1 SS-1 Solid 07/21/21 13:30 07/22/21 10:10

680-201851-2 SS-2 Solid 07/21/21 14:20 07/22/21 10:10

680-201851-3 SS-3 Solid 07/21/21 15:30 07/22/21 10:10

680-201851-4 DUP-1 Solid 07/21/21 12:00 07/22/21 10:10

680-201851-5 Trip Blank Water 07/21/21 00:00 07/22/21 10:10

Eurofins TestAmerica, Savannah Page 4 of 53 8/11/2021

Case Narrative

Project/Site: U.S. Coast Guard District 8 Dredging Pro

Job ID: 680-201851-1

Laboratory: Eurofins TestAmerica, Savannah

Narrative

Job Narrative 680-201851-1

Comments

No additional comments.

Receipt

The samples were received on 7/22/2021 10:10 AM. Unless otherwise noted below, the samples arrived in good condition, and where required, properly preserved and on ice. The temperatures of the 2 coolers at receipt time were 1.1º C and 2.8º C.

GC/MS VOA

Method 8260B: The method blank for preparation batch 680-678048 contained analytes above the reporting limit (RL). None of the samples associated with this method blank contained the target compound; therefore, re-extraction and/or re-analysis of samples were not performed.

Method 8260B: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated with analytical batch 680-679303.

Method 8260B: The reporting limit (RL) provided for the following sample falls below the laboratory's verified standard quantitation limit:

Trip Blank (680-201851-5). Results reported below the verified standard quantitation limit have less certainty (i.e., are estimated) and must be used at the client’s discretion. The continuing calibration blanks and method blanks may not support the lower RL.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

GC/MS Semi VOA Method 8270D: The following analyte has been identified, in the reference method and/or via historical data, to be a poor and/or erratic performer: Pentachlorophenol (-30.1%D). This analyte may have a %D >20% but must be <50% in the CCV. A CCV standard at or below the reporting limit (RL) was analyzed with the affected samples and found to be acceptable.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

GC Semi VOA

Method 8081B: Two surrogates are used for this analysis. The laboratory's SOP allows one of these surrogates to be outside acceptance criteria without performing re-extraction/re-analysis. The following samples contained an allowable number of surrogate compounds outside limits: SS-2 (680-201851-2) and (680-201851-E-1-I MSD). These results have been reported and qualified.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

Metals No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.

General Chemistry Method 1030: The following samples did not ignite: SS-1 (680-201851-1) and SS-2 (680-201851-2); therefore, an ignitability value could not be obtained. The result has been reported as "No Burn" (NB).

Method 1030: The following sample did not ignite: SS-3 (680-201851-3); therefore, an ignitability value could not be obtained. The result has been reported as "No Burn" (NB).

Method 1030: No samples ignited, therefore, there were no duplicates. An LCSD was added which met acceptability criteria.

Methods 335.4, 9012B, SM 4500 CN E: The matrix spike / matrix spike duplicate (MS/MSD) recoveries and precision for preparation batch

680-680138 and analytical batch 680-680288 were outside control limits. Sample matrix interference and/or non-homogeneity are suspected because the associated laboratory control sample / laboratory sample control duplicate (LCS/LCSD) precision was within acceptance limits.

Eurofins TestAmerica, Savannah Page 5 of 53 8/11/2021

Case Narrative

Project/Site: U.S. Coast Guard District 8 Dredging Pro

Job ID: 680-201851-1 (Continued)

Laboratory: Eurofins TestAmerica, Savannah (Continued)

Method 9012B: The following samples were prepared outside of preparation holding time due to analysis requested after holding time had already exceeded : SS-1 (680-201851-1), SS-2 (680-201851-2) and SS-3 (680-201851-3).

Method SM 2540G: The following samples were analyzed outside of analytical holding time due to analysis requested after holding time had already exceeded.SS-1 (680-201851-1), SS-2 (680-201851-2) and SS-3 (680-201851-3).

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

Organic Prep

No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.

VOA Prep No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.

Eurofins TestAmerica, Savannah Page 6 of 53 8/11/2021

Client Sample Results

Project/Site: U.S. Coast Guard District 8 Dredging Pro

Lab Sample ID: 680-201851-1Client Sample ID: SS-1 Matrix: SolidDate Collected: 07/21/21 13:30

Date Received: 07/22/21 10:10

Method: 8260B - Volatile Organic Compounds (GC/MS) - TCLP

RL MDL

Benzene 0.0086 U 0.020 0.0086 mg/L 07/29/21 17:20 20

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

0.20 0.068 mg/L 07/29/21 17:20 202-Butanone 0.068 U

0.020 0.0066 mg/L 07/29/21 17:20 20Carbon tetrachloride 0.0066 U

0.020 0.0052 mg/L 07/29/21 17:20 20Chlorobenzene 0.0052 U

0.020 0.010 mg/L 07/29/21 17:20 20Chloroform 0.010 U

0.020 0.010 mg/L 07/29/21 17:20 201,2-Dichloroethane 0.010 U

0.020 0.0072 mg/L 07/29/21 17:20 201,1-Dichloroethene 0.0072 U

0.020 0.015 mg/L 07/29/21 17:20 20Tetrachloroethene 0.015 U

0.020 0.0096 mg/L 07/29/21 17:20 20Trichloroethene 0.0096 U

0.020 0.010 mg/L 07/29/21 17:20 20Vinyl chloride 0.010 U

Toluene-d8 (Surr) 116 70 - 130 07/29/21 17:20 20

Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery

1,2-Dichloroethane-d4 (Surr) 91 07/29/21 17:20 2060 - 124

Dibromofluoromethane (Surr) 89 07/29/21 17:20 2070 - 130

4-Bromofluorobenzene (Surr) 102 07/29/21 17:20 2070 - 130

Method: 8270D - Semivolatile Organic Compounds (GC/MS) - TCLP

RL MDL

1,4-Dichlorobenzene 0.0027 U 0.050 0.0027 mg/L 07/28/21 14:23 08/02/21 21:28 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

0.050 0.0060 mg/L 07/28/21 14:23 08/02/21 21:28 12,4,5-Trichlorophenol 0.0060 U

0.050 0.0043 mg/L 07/28/21 14:23 08/02/21 21:28 12,4,6-Trichlorophenol 0.0043 U

0.050 0.0060 mg/L 07/28/21 14:23 08/02/21 21:28 12,4-Dinitrotoluene 0.0060 U

0.050 0.0045 mg/L 07/28/21 14:23 08/02/21 21:28 12-Methylphenol 0.0045 U

0.050 0.0065 mg/L 07/28/21 14:23 08/02/21 21:28 13 & 4 Methylphenol 0.0065 U

0.050 0.0040 mg/L 07/28/21 14:23 08/02/21 21:28 1Hexachlorobenzene 0.0040 U

0.050 0.0031 mg/L 07/28/21 14:23 08/02/21 21:28 1Hexachlorobutadiene 0.0031 U

0.050 0.0038 mg/L 07/28/21 14:23 08/02/21 21:28 1Hexachloroethane 0.0038 U

0.050 0.0037 mg/L 07/28/21 14:23 08/02/21 21:28 1Nitrobenzene 0.0037 U

0.25 0.010 mg/L 07/28/21 14:23 08/02/21 21:28 1Pentachlorophenol 0.010 U

0.25 0.012 mg/L 07/28/21 14:23 08/02/21 21:28 1Pyridine 0.012 U

2,4,6-Tribromophenol (Surr) 65 31 - 141 07/28/21 14:23 08/02/21 21:28 1

Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery

2-Fluorobiphenyl 62 07/28/21 14:23 08/02/21 21:28 138 - 130

2-Fluorophenol (Surr) 56 07/28/21 14:23 08/02/21 21:28 125 - 130

Nitrobenzene-d5 (Surr) 60 07/28/21 14:23 08/02/21 21:28 139 - 130

Phenol-d5 (Surr) 60 07/28/21 14:23 08/02/21 21:28 125 - 130

Terphenyl-d14 (Surr) 95 07/28/21 14:23 08/02/21 21:28 110 - 143

Method: 8081B - Organochlorine Pesticides (GC) - TCLP

RL MDL

Chlordane (technical) 0.00080 U 0.0025 0.00080 mg/L 07/29/21 14:08 07/29/21 19:52 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

0.00025 0.0000005 mg/L 07/29/21 14:08 07/29/21 19:52 1Endrin 0.00000050 U

0.00025 0.0000005 mg/L 07/29/21 14:08 07/29/21 19:52 1gamma-BHC (Lindane) 0.00000050 U

0.00025 0.0000005 mg/L 07/29/21 14:08 07/29/21 19:52 1Heptachlor 0.00000050 U

0.00025 0.0000010 mg/L 07/29/21 14:08 07/29/21 19:52 1Heptachlor epoxide 0.0000010 U

0.00025 0.0000010 mg/L 07/29/21 14:08 07/29/21 19:52 1Methoxychlor 0.0000010 U

Eurofins TestAmerica, Savannah

Page 7 of 53 8/11/2021

Project/Site: U.S. Coast Guard District 8 Dredging Pro

Lab Sample ID: 680-201851-1Client Sample ID: SS-1 Matrix: SolidDate Collected: 07/21/21 13:30

Date Received: 07/22/21 10:10

Method: 8081B - Organochlorine Pesticides (GC) - TCLP (Continued)

RL MDL

Toxaphene 0.0016 U 0.025 0.0016 mg/L 07/29/21 14:08 07/29/21 19:52 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

DCB Decachlorobiphenyl 54 30 - 130 07/29/21 14:08 07/29/21 19:52 1

Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery

Tetrachloro-m-xylene 36 07/29/21 14:08 07/29/21 19:52 130 - 130

Method: 8151A - Herbicides (GC) - TCLP

RL MDL

2,4-D 5.2 U 100 5.2 ug/L 08/04/21 08:20 08/06/21 20:09 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

20 2.1 ug/L 08/04/21 08:20 08/06/21 20:09 1Silvex (2,4,5-TP) 2.1 U

2,4-Dichlorophenylacetic acid 71 30 - 142 08/04/21 08:20 08/06/21 20:09 1

Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery

Method: 6010C - Metals (ICP) - TCLP

RL MDL

Arsenic 0.20 U 0.20 0.20 mg/L 07/28/21 14:04 07/29/21 13:29 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

1.0 1.0 mg/L 07/28/21 14:04 07/29/21 13:29 1Barium 1.0 U

0.10 0.10 mg/L 07/28/21 14:04 07/29/21 13:29 1Cadmium 0.10 U

0.20 0.20 mg/L 07/28/21 14:04 07/29/21 13:29 1Chromium 0.20 U

0.20 0.20 mg/L 07/28/21 14:04 07/29/21 13:29 1Lead 0.20 U

0.50 0.50 mg/L 07/28/21 14:04 07/29/21 13:29 1Selenium 0.50 U

0.10 0.10 mg/L 07/28/21 14:04 07/29/21 13:29 1Silver 0.10 U

Method: 7470A - Mercury (CVAA) - TCLP

RL MDL

Mercury 0.020 U 0.020 0.020 mg/L 07/28/21 15:50 07/29/21 13:11 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

General Chemistry

NONE NONE

Ignitability NB mm/sec 07/26/21 11:32 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

SU 08/09/21 12:14 1Soil pH in Water 7.2 HF

Degrees C 08/09/21 12:14 1Temperature 18.2 HF

NONE 07/27/21 12:42 1Free Liquid CNF

RL MDL

Cyanide, Total 0.073 J H 0.10 0.027 mg/Kg 08/10/21 11:29 08/10/21 18:19 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

56 56 mg/Kg 08/09/21 10:26 08/09/21 12:28 1Sulfide 56 U H

RL RL

Total Solids 76 H 0.10 0.10 % 08/09/21 12:25 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

Lab Sample ID: 680-201851-1Client Sample ID: SS-1 Matrix: SolidDate Collected: 07/21/21 13:30

Percent Solids: 68.3Date Received: 07/22/21 10:10

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography

RL MDL

PCB-1016 8.0 U 24 8.0 ug/Kg ☼ 07/26/21 12:25 07/27/21 00:41 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

24 11 ug/Kg 07/26/21 12:25 07/27/21 00:41 1☼PCB-1221 11 U

24 3.8 ug/Kg 07/26/21 12:25 07/27/21 00:41 1☼PCB-1232 3.8 U

24 3.6 ug/Kg 07/26/21 12:25 07/27/21 00:41 1☼PCB-1242 3.6 U

24 5.9 ug/Kg 07/26/21 12:25 07/27/21 00:41 1☼PCB-1248 5.9 U

Eurofins TestAmerica, Savannah

Page 8 of 53 8/11/2021

Project/Site: U.S. Coast Guard District 8 Dredging Pro

Lab Sample ID: 680-201851-1Client Sample ID: SS-1 Matrix: SolidDate Collected: 07/21/21 13:30

Percent Solids: 68.3Date Received: 07/22/21 10:10

Method: 8082A - Polychlorinated Biphenyls (PCBs) by Gas Chromatography (Continued)

RL MDL

PCB-1254 7.2 U 24 7.2 ug/Kg ☼ 07/26/21 12:25 07/27/21 00:41 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

24 6.9 ug/Kg 07/26/21 12:25 07/27/21 00:41 1☼PCB-1260 6.9 U

Tetrachloro-m-xylene 92 22 - 130 07/26/21 12:25 07/27/21 00:41 1

Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery

DCB Decachlorobiphenyl 53 p 07/26/21 12:25 07/27/21 00:41 125 - 138

Lab Sample ID: 680-201851-2Client Sample ID: SS-2 Matrix: SolidDate Collected: 07/21/21 14:20

Date Received: 07/22/21 10:10

Method: 8260B - Volatile Organic Compounds (GC/MS) - TCLP

RL MDL

Benzene 0.0086 U 0.020 0.0086 mg/L 07/29/21 17:43 20

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

0.20 0.068 mg/L 07/29/21 17:43 202-Butanone 0.068 U

0.020 0.0066 mg/L 07/29/21 17:43 20Carbon tetrachloride 0.0066 U

0.020 0.0052 mg/L 07/29/21 17:43 20Chlorobenzene 0.0052 U

0.020 0.010 mg/L 07/29/21 17:43 20Chloroform 0.010 U

0.020 0.010 mg/L 07/29/21 17:43 201,2-Dichloroethane 0.010 U

0.020 0.0072 mg/L 07/29/21 17:43 201,1-Dichloroethene 0.0072 U

0.020 0.015 mg/L 07/29/21 17:43 20Tetrachloroethene 0.015 U

0.020 0.0096 mg/L 07/29/21 17:43 20Trichloroethene 0.0096 U

0.020 0.010 mg/L 07/29/21 17:43 20Vinyl chloride 0.010 U

Toluene-d8 (Surr) 118 70 - 130 07/29/21 17:43 20

Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery

1,2-Dichloroethane-d4 (Surr) 93 07/29/21 17:43 2060 - 124

Dibromofluoromethane (Surr) 98 07/29/21 17:43 2070 - 130

4-Bromofluorobenzene (Surr) 101 07/29/21 17:43 2070 - 130

Method: 8270D - Semivolatile Organic Compounds (GC/MS) - TCLP

RL MDL

1,4-Dichlorobenzene 0.0027 U 0.050 0.0027 mg/L 07/28/21 14:23 08/02/21 21:52 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

0.050 0.0059 mg/L 07/28/21 14:23 08/02/21 21:52 12,4,5-Trichlorophenol 0.0059 U

0.050 0.0043 mg/L 07/28/21 14:23 08/02/21 21:52 12,4,6-Trichlorophenol 0.0043 U

0.050 0.0059 mg/L 07/28/21 14:23 08/02/21 21:52 12,4-Dinitrotoluene 0.0059 U

0.050 0.0045 mg/L 07/28/21 14:23 08/02/21 21:52 12-Methylphenol 0.0045 U

0.050 0.0064 mg/L 07/28/21 14:23 08/02/21 21:52 13 & 4 Methylphenol 0.0064 U

0.050 0.0040 mg/L 07/28/21 14:23 08/02/21 21:52 1Hexachlorobenzene 0.0040 U

0.050 0.0031 mg/L 07/28/21 14:23 08/02/21 21:52 1Hexachlorobutadiene 0.0031 U

0.050 0.0038 mg/L 07/28/21 14:23 08/02/21 21:52 1Hexachloroethane 0.0038 U

0.050 0.0037 mg/L 07/28/21 14:23 08/02/21 21:52 1Nitrobenzene 0.0037 U

0.25 0.0099 mg/L 07/28/21 14:23 08/02/21 21:52 1Pentachlorophenol 0.0099 U

0.25 0.012 mg/L 07/28/21 14:23 08/02/21 21:52 1Pyridine 0.012 U

2,4,6-Tribromophenol (Surr) 83 31 - 141 07/28/21 14:23 08/02/21 21:52 1

Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery

2-Fluorobiphenyl 85 07/28/21 14:23 08/02/21 21:52 138 - 130

2-Fluorophenol (Surr) 66 07/28/21 14:23 08/02/21 21:52 125 - 130

Nitrobenzene-d5 (Surr) 82 07/28/21 14:23 08/02/21 21:52 139 - 130

Phenol-d5 (Surr) 73 07/28/21 14:23 08/02/21 21:52 125 - 130

Eurofins TestAmerica, Savannah

Page 9 of 53 8/11/2021

Project/Site: U.S. Coast Guard District 8 Dredging Pro

Lab Sample ID: 680-201851-2Client Sample ID: SS-2 Matrix: SolidDate Collected: 07/21/21 14:20

Date Received: 07/22/21 10:10

Method: 8270D - Semivolatile Organic Compounds (GC/MS) - TCLP (Continued)

Terphenyl-d14 (Surr) 93 10 - 143 07/28/21 14:23 08/02/21 21:52 1

Surrogate Dil…