B.08.02_Attachment K_ASI Final Report - Mattituck Harbor.pdf

Technical Report on the Sampling and Testing of Sediment from Mattituck Harbor Federal Navigation Channel, Long Island, New York

Contract No. W912DS-22-D-0002 Delivery Order No. W912DS-23-F-0043

Prepared for:

Army Corps of Engineers, New York District 26 Federal Plaza

New York, NY 10278

August 16, 2023

ASI Job No. 43-052

Table of Contents

Table of Contents Information Page Signature Page I. Introduction

II. Correspondence

III. Test Administration A. Sponsor B. Testing Facility C. Dates of Experimentation D. Study Participants

IV. Materials and Methods A. Sampling B. Homogenizing C. Physical Analysis and Total Organic Carbon

V. Physical Analysis Results

Figures and Tables

Figure 1 Site Map Table 1 DGPS Coordinates Table 2a Sample Identification, Grain Size Distribution, Percent Moisture, and TOC Table 2b Sample Identification, Grain Size Distribution- Grain Size Only Locations

Appendices Appendix A: Sediment Core Logs Appendix B: Photographs Appendix C: Chains of Custody Appendix D: Sample Use Forms Appendix E: Grain Size Distribution and Percent Moisture Raw Data Appendix F: TOC Raw Data and SRM Control Chart

Page

Information Page

Technical Report on the Sampling and Testing of Sediment from Mattituck Harbor Federal Navigation Channel, Long Island, New York

Contract No. W912DS-22-D-0002

Delivery Order No. W912DS-23-F-0043

STUDY INITIATION DATE

June 7, 2023

STUDY COMPLETION DATE

August 16, 2023

PERFORMING LABORATORY

Aqua Survey, Inc.

469 Point Breeze Road

Flemington, New Jersey 08822

SPONSOR

Army Corps of Engineers, New York District 26 Federal Plaza

New York, NY 10278

LABORATORY PROJECT ID

ASI Study No. 43-052

I. INTRODUCTION

The objective of this project was to collect and analyze sediment from Mattituck Harbor Federal Navigation Channel in Long Island, New York. This work was conducted in accordance with Appendix B, Attachment 1, of the technical manual entitled “The Management and Regulation of Dredging Activities and Dredged Material in New Jersey’s Tidal Waters” (Dredging Manual) and a Proposed Sediment Sampling Plan dated January 18, 2023, revised March 22, 2023.

Aqua Survey, Inc. (ASI) performed all sampling and physical analyses (grain size distribution, percent moisture & total organic carbon analysis). Chemical analysis of the samples was contracted directly with the analytical laboratory, Battelle, and its subcontract lab, Eurofins TestAmerica, Pittsburgh, PA. Their analytical results are not included in this report.

II. CORRESPONDENCE

The following page(s) provide correspondence for this project.

6 . ISSUE D BY COD E

W912DS22D0002

1 . CO N TRA CT/P U RCH . O RD E R/

A G RE E M E N T N O .

W 912D S

2 . D E L IVE RY O RD E R/ CA L L N O .

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3 . D A TE O F O RD E R/CA L L

2023 May 05

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W16R 0E31234196

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U S AR MY C OR PS OF EN GIN EER S, N EW Y OR K

26 F ED ER AL PLAZ A, R M 16-300

N EW Y OR K N Y 10278-0090

7 . ADM IN IST E RED BY (if o th er th an 6 )

( YYYYM M M D D )

1 0 . D E L IVE R TO FO B P O IN T BY (D ate)

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469 POIN T BR EEZ E R D

F LEMIN GTON N J 08822-4701

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M A RK IF BU SIN E SS IS1 1 .

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D ISA D VA N TA G E D

W O M E N -O W N E D

1 3 . M AIL INVOICES T O T HE A DDRE SS IN BL OCK

See Item 15

25 . T OT A L $26,520.00

OPER ATION S D IVISION

BETH N ASH

26 F ED ER AL PLAZ A R OOM 16-406

N EW Y OR K N Y 10278

X

1 7 . A CCOUN T IN G AN D AP P RO P RIAT ION D AT A/ L OCA L USE

COD E

1 8 . IT E M NO. 1 9 . SCHE DU LE OF SU P P L IE S/ SE RVICES

* If q u a n t i ty a ccep ted b y th e G o vern m en t i s s a m e a s q u a n t i t y a ccep ted b elo w q u a n t i ty o r d ered a n d en ci rcl e.

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U SAC E, F IN AN C E C EN TER MILLIN GTON

ATTN : C EF C -AO-P, AC C OU N TS PAY ABLE BR AN C H

5722 IN TEGR ITY D R IVE

MILLIN GTON TN 38054-5005

Th i s d el iv ery o rd er/cal l i s i s su ed o n an o th er G o v ern men t ag en cy o r in acco rd an ce w i th an d su b j ect to t erms an d co n d i t io n s o f ab o v e n u mb ered co n t ract .

T YP E CAL L

OF P U RCHASE

ORD E R

SEE SCHEDULE

24. UNITED STATES OF AMERICA

TEL: 917-790-8069

EMAIL: nicholas.p.emanuel@usace.army.mil

CONTRACTING / ORDERING OFFICER

q u a n t i t y o rd er ed , in d ica t e b y X . If d i f fer en t , en ter a ctu a l

BY: NICHOLAS P EMANUEL

If t h is bo x is m ark ed, sup p lier m ust sign Accep t ance an d ret urn t h e fo llo wing n um ber o f co p ies:

NA M E OF CONT RACT OR SIGN AT URE T YP E D NAM E A ND T IT L E

( YYYYM M M D D )

DA T E SIGNED

ACCE P T ANCE . T HE CO NT RACT O R HE RE BY A CCE P T S T H E OFFE R RE P RE SE N T E D BY T H E NUM BE RE D P URCH ASE ORD E R AS IT M AY P RE VIOU SL Y H AVE BE E N OR IS NOW M O DIFIE D , SUBJE CT T O A LL OF T H E T E RM S

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2 7 a. QUA NT IT Y IN COL U M N 2 0 H AS BEE N

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e. M AIL ING AD DRESS O F A UT H ORIZ E D GOVERN M E NT RE P RE SE N T AT IVE

36. I ce r tify th is account is corr e ct and pr ope r for paym e nt.

g. E -M AIL ADD RE SSf. T E LE P H ONE N UM BE R

a. DA T E

( YYYYM M M D D )

b. SIGNAT URE AN D T IT L E OF CE RT IFYING O FFICE R

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3 7 . RE CE IVE D AT 3 8 . RE CE IVE D BY

( YYYYM M M D D )

3 1 . P A YM E NT

COM P LE T E

P ART IAL

FINA L

P ART IAL

FINA L

DD Form 1155, DEC 2001 P RE VIOUS E DIT ION IS OBSOL E T E.

3 9 . DAT E RE CE IVE D 4 0 . T O T AL

CON T AINE RS

4 1 . S/R A CCOU NT NO. 4 2 . S/R VO UCHE R N O.

AD D R ESS

AN D

N AME

Aqua Survey, Inc. Jon Doi, Executive Vice President 2023May09

Mattituck Harbor

NYSDEC APPLICATION # 1-4738-00995/00005

Proposed Sediment Sampling Plan

Prepared by: Beth Nash and Daniel Arnstein, U.S. Army Corps of Engineers, NY District

Date: January 18, 2023

Revision Date: March 22, 2023

I. Project Background

Mattituck Harbor is a tidal inlet located on the north shore of Long Island Sound, about 85 miles by water east of the Battery, New York City and provides for a channel 7 feet deep and 100 feet wide at the entrance and 80 feet wide thereafter from the Long Island Sound, extending southward about 2 ¼ miles to the Village of Mattituck, Town of Southold, Suffolk County, NY. Dredging will be conducted by a hydraulic dredge or similar plant to the authorized depth of 7 feet MLLW with an allowable overdepth of 1 foot. It is currently expected that silty material will be beneficially used at an upland placement site located within the State of New York and furnished by a dredging contractor, or offshore at the Historic Area Remediation Site (HARS), if found to be suitable for HARS placement. Please note that material found to be 90% sand or greater is expected to be placed on a nearby downdrift beach.

The estimated, total volume of material to be removed is 11,500 cubic yards (CY). Dredging must be done to alleviate the effects of shoaling and maintain the authorized project dimensions, thereby assuring safe and economical use of the inlet and harbor by commercial and recreational maritime interests.

II. Site Description and Project History:

Mattituck Harbor is located on the north shore of Long Island and is stabilized by two riprap jetties at the channel entrance. The east jetty was completed in 1906 with a length of approximately 775 feet, and the west jetty was completed in 1938 with a length of approximately 1,100 feet. The original navigation channel construction was completed in 1914. Construction of the navigation channel under the existing project was completed in 1921. This asset serves as a Harbor of Refuge during severe storms. The harbor also supports recreational boating, including several commercial marinas. The Mattituck Creek Waterway Access Site, adjacent to the federal channel, is the largest boat launch site maintained by New York State Department of Environmental Conservation and provides public access to the waters of Long Island Sound.

In Fiscal Year (FY) 2014, the Mattituck Inlet Federal Navigation Channel was used as a sand source for a beach nourishment project when approximately 100,000 CY of dredged sand was placed at Baillie Beach Park in Mattituck, NY, under Section 111 of the Continuing Authorities Program (CAP). Prior to that, the channel was dredged in FY2004, when approximately 14,000 CY of dredged sand was beneficially used along the Baillie Beach shoreline. During FY1996, a west jetty rehabilitation project was completed.

A search of the NYSDEC Spill Incidents Database was performed from January 2013 – January 2023. Spill Records are attached at the end of this document.

II. Sampling Methodology Sediment samples will be collected by Aqua Survey, Inc., 469 Point Breeze Rd, Flemington, NJ 08822, Phone: (908)788-8700. The analytical laboratory to be used for the chemical analysis will be Battelle, Inc., 141 Longwater Drive, Norwell, MA 02061, Phone:

(781) 681-5400. These laboratories are certified and approved by the New York State Department of Health.

Sediment cores shall be collected from Mattituck Harbor entrance channel for grain size only analysis and from the southward parts of the channel for upland and HARS testing. Four

(4) sediment sample locations are proposed for Mattituck Harbor Entrance Channel grain size analysis (orange hatched areas). The dredging area is approximately 7,200 square feet. The volume of material is approximately 2,500 CY. Dredging depth is -7 feet below MLLW plus 1 foot allowable overdepth. Five (5) sediment sample locations are proposed for Mattituck Harbor Main Channel (green hatched areas). The dredging area is approximately 93,500 square feet. The volume of material is approximately 9,000 CY. Dredging depth is -7 feet below MLLW plus 1 foot allowable overdepth. Sample locations in the Entrance Channel were selected based on fully characterizing the material for grain size analysis and potential placement on a nearby beach. Sample locations in the Main Channel were selected based on fully characterizing the shoaled areas along the length of the channel for potential upland or HARS placement. In all dredging areas, sampling locations have been placed to collect sediment from the most shoaled areas and to fully represent potential variability in sediment contamination.

Core samples shall be collected using a vibracore system or similar sediment coring device to a minimum depth of two feet below the proposed dredging depth. Sample collection will follow established protocols and procedures, consistent with the sediment sampling guidance provided in Appendix C of NYSDEC TOGS 5.1.9 (In-Water and Riparian Management of Sediment and Dredge Material).

Each core will be divided into three sections for analysis. The top section (Segment A), comprised of the surface-to-depth material (0-8’), represents the material to be dredged. The second section (Segment B, 8-8 ½’), comprised of the first six inches of material below the dredging depth, represents the bottom sediment that will be exposed after the dredging is completed. The third section (Segment C, 8 ½ -9’), comprised of the six inches of material below Segment B, represents an alternative bottom which may be necessary if Segment B proves to be contaminated. Segment C will be archived at 4 C and will not be physically or chemically analyzed unless Segment B exceeds Class C criteria.

Once segment boundaries are established, each sediment core segment will be photographed and inspected for visibly distinct layers. If distinct layers are apparent, they will be analyzed separately. Individual horizons or strata within each core will be measured along with the overall core length. These measurements and all significant features will be documented in a field notebook in accordance with Section IIIa. of this sampling plan. Using a permanent marker, the date, time, and sample location will also be recorded on the sediment core tube liner in accordance with Section III b. of this plan.

If the sediment in the core segment is reasonably consistent, a grab sample shall be taken from the segment (one from each segment). These grab samples are to be used for VOC analysis in the event that such analysis is required, and shall be preserved, undisturbed, with no headspace in the jar, to avoid volatilization of chemical compounds.

After the VOC grab sample is taken, the balance of material for each segment will be composited by placing the material in a clean tub and mixing it with a clean spatula to a uniform consistency. Care will be taken to include material from the entire thickness of each core segment when creating a composite. Generally, sediment to be analyzed for trace metals should not come into contact with metals and sediment to be analyzed for organic compounds should not come into contact with plastics. Sufficient material from each composited segment shall be taken for analysis as described in Section IV below.

For each core, this sampling procedure yields three grab samples and three corresponding composite samples. A visual inspection of the sediment cores will be performed and documented. Individual horizons or strata within each core will be measured along with the overall core length.

Sample containers will be supplied by the testing laboratory. The containers will be laboratory cleaned, pre-preserved and sealed with the appropriate documentation. All sample containers will be labeled using a permanent marker to indicate the date, time, sample location, and sample identification number. This information will also be recorded in a field log book and on a chain of custody form that will follow the samples. Once each sample container is filled, capped, and labeled, it will be appropriately packaged to prevent breakage and placed in an ice-filled insulated cooler, maintained at a temperature of 4° C, until the samples are delivered to the laboratory within 24 hours of collection.

Sample numbering shall be formatted as follows:

A minimum of 19 samples (4 grain size and 5 upland vibracores/sampling locations) will be examined and identified according to the following format:

Entrance Channel (grain size only) Sample EC-1A – Location 1, surface to proposed dredging depth (0-8’) Sample EC-2A – Location 2, surface to proposed dredging depth (0-8’) Sample EC-3A – Location 3, surface to proposed dredging depth (0-8’) Sample EC-4A – Location 4, surface to proposed dredging depth (0-8’)

Main Channel (upland) Sample MC-5A – Location 5, surface to proposed dredging depth (0-8’) Sample MC-5B – Location 5, 0”-6” below post-dredge bottom (8-8 ½ ’) Sample MC-5C – Location 5, 6”-12” below post-dredge bottom (8 ½ -9’) Sample MC-6A – Location 6, surface to proposed dredging depth (0-8’)

Sample MC-4A - Location 4, surface to proposed dredging depth (0'-8') Sample MC-4B - Location 4, 0"-6" below post-dredge bottom (8'-8.5') Sample MC-4C - Location 4, 6"-12" below post-dredge bottom (8.5'-9')

Sample MC-6B – Location 6, 0”-6” below post-dredge bottom (8-8 ½ ’) Sample MC-6C – Location 6, 6”-12” below post-dredge bottom (8 ½ -9’) Sample MC-7A – Location 7, surface to proposed dredging depth (0-8’) Sample MC-7B – Location 7, 0”-6” below post-dredge bottom (8-8 ½ ’) Sample MC-7C – Location 7, 6”-12” below post-dredge bottom (8 ½ -9’) Sample MC-8A – Location 8, surface to proposed dredging depth (0-8’) Sample MC-8B – Location 8, 0”-6” below post-dredge bottom (8-8 ½ ’) Sample MC-8C – Location 8, 6”-12” below post-dredge bottom (8 ½ -9’) Sample MC-9A – Location 9, surface to proposed dredging depth (0-8’) Sample MC-9B – Location 9, 0”-6” below post-dredge bottom (8-8 ½ ’) Sample MC-9C – Location 9, 6”-12” below post-dredge bottom (8 ½ -9’)

III. Quality Assurance and Quality Control

Field and laboratory QA/QC procedures will be consistent with the requirements outlined in Appendix C of the NYSDEC In-Water and Riparian Management of Sediment and Dredged Material (TOGS 5.1.9). Testing for samples will be in accordance with the following procedures and methods:

United States Environmental Protection Contaminants Agency (USEPA) SW-846 Method

Pesticides (Including Mirex) 8081 A Herbicide (Silvex) 8151 Total Aroclors of PCBs 8082 Volatile Organics (VOCs) 8260 B Semi-Volatile Organics (SVOCs) 8270 C Metals 6010 B Hexavalent Chromium 7196A Cyanide 9012A Total Organic Carbon (TOC) 9060 A

Dioxin is not historically present in Long Island waterways. Therefore, the Corps of Engineers proposes to not analyze for this contaminant in the current testing plan.

The laboratory will provide a category B data package for Department review in PDF format.

a. Field Documentation Procedures

The following information shall be collected and documented on an appropriate data sheet and submitted with the test results:

• Field Conditions

• Weather Conditions

• Pertinent observations that may bear influence on the analyses of the samples

• Name of sampler

• Sample designation

• Collection method

• Detailed description of soil (estimation of soil composition)

The sampler shall document each sample taken with photographs and take other photographs to document the surrounding conditions, sampling procedures, etc.

b. Custody Procedures (Chain-of-Custody)

The samples shall remain in the custody of the sampler from the time the samples are taken through the delivery to the testing laboratory. Custody will be transferred in compliance with all applicable standards. Care will be taken to ensure that:

• All samples are uniquely identified

• Vital sample characteristics are preserved

• Correct samples are tested and traceable to their source

• Samples are protected from loss and / or damage

• Sample information is recorded on a sample label that corresponds to a chain-of-custody form (see attached)

A Chain-of-Custody form (copy attached) shall be completed for each sample in order to provide an accurate record that traces the possession and handling of each sample from the time of collection through performance of the analyses. The form shall contain the following information, at a minimum:

• Project / Site Name

• Unique Sample Number

• Date of Collection

• Time of Collection

• Type of preservation (if applicable)

• Sampler’s name

IV. Analyses to be Performed

The following analyses will be performed on sample segments A (material to be dredged) and B (0” to 6” below the post-dredging bottom) from each sample location before the maximum allowable holding time for testing is exceeded.

a. Grain Size Distribution

Grain size distribution of each composite sample segment will be determined by a sieve analysis performed in accordance with ASTM D422 test method that covers the quantitative determination of the distribution of particle sizes in soils.

b. Total Organic Carbon

The Total Organic Carbon (TOC) of each composite sample segment will be determined in accordance with EPA Method 9060A.

c. Testing Sequence

If the grain size and TOC analyses determine that the composition of any sample segment is at least 90% sand or larger materials (10% or less material passes through No. 200 sieve) and less than 0.5% TOC, no further testing of that sample segment shall be performed.

Each of the sample segments containing more than 10% of material passing through the No. 200 sieve or greater than 0.5% TOC will be analyzed for all non-VOC parameters identified in Table 2 of TOGS 5.1.9 and Table 375-6.8(b) of 6NYCRR Part 375 (Environmental Remediation Programs: Remedial Program Soil Cleanup Objectives), both attached hereto as Table 2. The appropriate corresponding grab sample (collected prior to compositing the segments; see section II above) shall be analyzed for all VOCs in these two Tables.

If the results of the sediment analyses determine that there is risk of significantly higher contaminant levels becoming exposed in the post-dredging bottom or that existing Class C levels are not removed by the proposed dredging depth, the applicant will provide a proposed plan to mitigate the problem of elevated contaminant levels.

The mitigation plan will be submitted to the NYSDEC for review and comment along with the results of the sediment analyses.

Table 2. NYSDEC Contaminant Parameters, Methods, and Thresholds

Physical Properties

Grain Size ASTM C136 or D422

Total Organic Carbon EPA 9060A

NYSDEC

Technical Reviewing

Unit

Parameter

Sediment/Soil

Suggested

EPA

Analytical

Method

CLP\RCRA

CAS Number

DMM

Unrestricted

Use (ppm)

BOH Class B

Threshold1 (mg/kg)

BOH

Class C

Threshold (mg/kg)

Metals

BOH, DMM

Arsenic

EPA 6010B 7440-38-2 13c 14 (8.2) 53

DMM Barium EPA 6010B 7440-39-3 350c

DMM Beryllium EPA 6010B 7440-41-7 7.2

Cadmium

EPA 6010B 7440-43-9 2.5c 1.2 9.5

BOH

Chromium

EPA 6010B 26 (81) 110 (370)

DMM

Chromium, hexavalentc

EPA 7196A 18540-29-9 1b

DMM

Chromium, trivalentc EPA 6010B 16065-83-1 30c

Copper

EPA 6010B 7440-50-8 50 33 207 (270)

DMM Total Cyanidee,f EPA 9012A 27

Lead

EPA 6010B 7439-92-1 63c 33(47) 166(218)

DMM Manganese EPA 6010B 7439-96-5 1600c 460 1100

Mercury

EPA 6010B,

7470 0.18c 0.17 1.6 (1.0)

Nickel

EPA 6010B 7440-02-0 30 16 (21) 50 (52)

DMM Selenium EPA 6010B 7782-49-2 3.9c

Silver

EPA 6010B 7440-22-4 2 1.0 2.2 (3.7)

Zinc

EPA 6010B 7440-66-6 109c 120 (150) 270 (410)

Pesticides

DMM

2,4,5 – TP Acid

(Silvex)f

EPA

8151 93-72-1 3.8

Analytical

Method

CLP\RCRA

CAS Number

DMM

Unrestricted

Use (ppm)

BOH Class B

Threshold1 (mg/kg)

BOH

Class C

Threshold (mg/kg)

DMM 4,4’- DDE EPA 8081A 72-55-9 0.0033b

DMM 4,4’ – DDT EPA 8081A 50-29-3 0.0033b

DMM 4,4’ - DDD EPA 8081A 72-54-8 0.0033b

Sum of

DDT+DDE+DDD

EPA 8081A 0.003 0.03

DMM Aldrin EPA 8081A 309-00-2 0.005c

DMM Alpha - BHC EPA 8081A 319-84-6 0.02

DMM Beta – BHC EPA 8081A 319-85-7 0.036

DMM Delta – BHCg EPA 8081A 319-86-8 0.04

DMM Chlordane (alpha) EPA 8081A 5103-71-9 0.094

Chlordane

EPA 8081A 0.003 0.036

DMM dibenzofuranf

EPA

8270 132-64-9 7

Dieldrin

EPA 8081A 60-57-1 0.005c 0.11 0.48

DMM Endosulfan I d,f EPA 8081A 959-98-8 2.4

DMM Endosulfan II d, f EPA 8081A 33213-65-9 2.4

DMM Endosulfan sulfated,f EPA 8081A 1031-07-8 2.4

DMM Endrin EPA 8081A 72-20-8 0.014

DMM Heptachlor EPA 8081A 76-44-8 0.042

DMM Lindane EPA 8081A 58-89-9 0.1

Mirex

EPA 8081A 0.0014 0.014

PCBs

PCBs (sum of aroclors)

EPA 8082 1336-36-3 0.1 0.1 1

Semi-Volatile Organics

BOH 2-chloronaphthalene EPA 8270 91-58-7

BOH 2-methylnaphthalene EPA 8270 91-5706

BOH, DMM Acenaphthene EPA 8270 83-32-9 20 0.016 0.5

BOH, DMM Acenapthylenef EPA 8270 208-96-8 100a 0.044 0.64

BOH, DMM Anthracenef EPA 8270 120-12-7 100a 0.085 0.11

BOH, DMM Benz(a)anthracenef EPA 8270 56-55-3 1c 0.261 1.6

BOH, DMM Benzo(a)pyrene EPA 8270 50-32-8 1c 0.43 1.6

BOH, DMM Benzo(b)fluoranthenef EPA 8270 205-99-2 1c

Analytical

Method

CLP\RCRA

CAS Number

DMM

Unrestricted

Use (ppm)

BOH Class B

Threshold1 (mg/kg)

BOH

Class C

Threshold (mg/kg)

BOH, DMM Benzo(g,h,i)perylenef EPA 8270 191-24-2 100

BOH, DMM Benzo(k)fluoroanthenef EPA 8270 207-08-9 0.8c

BOH, DMM Chrysenef EPA 8270 218-01-9 1c 0.384 2.8

BOH, DMM Dibenz(a,h)anthracenef EPA 8270 53-70-3 0.33b 0.063 0.26

BOH, DMM Fluoranthenef EPA 8270 206-44-0 100a 0.6 5.1

BOH, DMM Fluorene EPA 8270 86-73-7 30 0.019 0.54

BOH, DMM Indeno(1,2,3-cd)pyrenef EPA 8270 193-39-5 0.5c

DMM m-Cresolf EPA 8270 108-39-4 0.33b

BOH, DMM Naphthalenef EPA 8270 91-20-3 12 0.16 2.1

DMM o-Cresolf EPA 8270 95-48-7 0.33b

DMM p-Cresolf EPA 8270 106-44-5 0.33b

DMM Pentachlorophenol EPA 8270 87-86-5 0.8b

BOH, DMM Phenanthrenef EPA 8270 85-01-8 100 0.24 1.5

DMM Phenol EPA 8270 108-95-2 0.33b

BOH, DMM Pyrenef EPA 8270 129-00-0 100 0.665 2.6

Total PAH2

EPA 8270 0.33 4

Volatile Organic Compounds

DMM 1,1,1 - trichloroethanef EPA 8260B 71-55-6 0.68

DMM 1,1 - Dichloroethanef EPA 8260B 75-34-3 0.27

DMM 1,1 - Dichloroethenef EPA 8260B 75-35-4 0.33

DMM 1,2 - Dichlorobenzenef EPA 8260B 95-50-1 1.1

DMM 1,2 - Dichloroethane EPA 8260B 107-06-2 0.02c

DMM cis 1,2 - Dichloroethenef EPA 8260B 156-59-2 0.25

DMM trans 1,2 - Dichloroethenef EPA 8260B 156-60-5 0.19

DMM 1,3 - Dichlorobenzenef EPA 8260B 541-73-1 2.4

DMM 1,4 - Dichlorobenzene EPA 8260B 106-46-7 1.8

DMM 1,4 – Dioxane EPA 8260B 123-91-1 0.1b

DMM Acetone EPA 8260B 67-64-1 0.05

BOH, DMM Benzene EPA 8260B 71-43-2 0.06 0.59 2.16

DMM n-Butylbenzenef EPA 8260B 104-51-8 12

DMM Carbon tetrachloridef EPA 8260B 56-23-5 0.76

DMM Chlorobenzene EPA 8260B 108-90-7 1.1

DMM Chloroform EPA 8260B 67-66-3 0.37

Analytical

Method

CLP\RCRA

CAS Number

DMM

Unrestricted

Use (ppm)

BOH Class B

Threshold1 (mg/kg)

BOH

Class C

Threshold (mg/kg)

DMM Ethylbenzenef EPA 8260B 100-41-4 1

DMM Hexachlorobenzenef EPA 8260B 118-74-1 0.33b

DMM Methyl ethyl ketone EPA 8260B 78-93-3 0.12

DMM Methyl tert-butyl etherf EPA 8260B 1634-04-4 0.93

DMM Methylene chloride EPA 8260B 75-09-2 0.05

DMM n-Propylbenzenef EPA 8260B 103-65-1 3.9

DMM sec-Butylbenzenef EPA 8260B 135-98-8 11

DMM tert-Butylbenzenef EPA 8260B 98-06-6 5.9

DMM Tetrachloroethene EPA 8260B 127-18-4 1.3

DMM Toluene EPA 8260B 108-88-3 0.7

DMM Trichloroethene EPA 8260B 79-01-6 0.47

DMM 1,2,4-Trimethylbenzenef EPA 8260B 95-63-6 3.6

DMM 1,3,5- trimethylbenzenef EPA 8260B 108-67-8 8.4

DMM Vinyl chloridef EPA 8260B 75-01-4 0.02

DMM Xylene (mixed) EPA 8260B 1330-20-7 0.26

Total BTEX3

EPA 8260B 0.96 5.9

1 Threshold values lower than the Minimum Detection Limit are superseded by the Minimum Detection Limit.

2 Total PAHs – sum the concentrations of the 18 semi-volatile analytes identified as BOH parameters 3 Total BTEX – The sum of benzene, toluene and xylene concentrations a The Soil Cleanup Objectives (SCOs) for unrestricted use were capped at a maximum value of 100 ppm. See

Technical Support document, section 9.3 b For constituents where the calculated SCO was lower than the contract required quantitation limit (CRQL), the

CRQL is used as the Track 1 SCO value.

c For constituents where the calculated where the calculated SCO was lower than the rural soil background concentration, as determined by the Department and the Department of Health rural soil survey, the rural soil background concentration is used as the track 1 SCO value for this use of the site.

d SCO is the sum of endosulfan I, endosulfan II and endosulfan sulphate.

e The SCO for this specific compound (or family of compounds) is considered to be met if the analysis for the total species of this contaminant is below the specific SCO.

f Protection of ecological resources SCOs were not developed for contaminants identified in Table 375-6.8(b) with “NS”. Where such contaminants appear in Table 375-6.8(a), the applicant may be required by the Department to calculate a protection of ecological resources SCO according to the TSD.

III. TEST ADMINISTRATION

A. Sponsor

Army Corps of Engineers, New York District (USACE-NYD) 26 Federal Plaza New York, NY 10278

B. Testing Facilities

Aqua Survey, Inc.

469 Point Breeze Road Flemington, NJ 08822

Eurofins Knoxville 5815 Middlebrook Pike Knoxville, TN 37921

Eurofins TestAmerica 301 Alpha Drive RDIC Park Pittsburgh, PA 15238

C. Dates of Experimentation

Date of Study Initiation: June 7, 2023 Date of Study Completion: August 16, 2023

D. Study Participants

Jon Doi, Ph.D. Executive Vice President Thomas Dolce Field Operations Manager Cheryl Hall Quality Assurance Officer Elizabeth Horn Staff Scientist Jefferey Plone Field Operations Support Michelle Thomas Laboratory Manager Anthony Zanzonico Field Operations Specialist

IV. MATERIALS AND METHODS

All sampling and testing were performed in accordance with Appendix B, Attachment 1, of the technical manual entitled “The Management and Regulation of Dredging Activities and Dredged Material in New Jersey’s Tidal Waters” (Dredging Manual) and a Proposed Sediment Sampling Plan dated January 18, 2023, revised March 22, 2023.

A. Sampling

Test sediment from nine locations were collected from Mattituck Harbor Federal Navigation Channel in Long Island, New York, by Aqua Survey personnel on June 7 through June 9, 2023.

The vessel used for sampling, the R/V Sandusky, was positioned using a Trimble Differential Global Positioning System (DGPS). Sediment collection was performed using a Rossfelder P-3 vibracore with flexible plastic core liners.

Project depths were minus 8 feet below mean lower low water (MLLW) including 1 foot allowable overdredge for locations 1 through 3 and minus 9 feet below mean lower low water (MLLW) including 1 foot allowable overdredge for locations 4 through 9. See Table 1 for DGPS coordinates.

See Figure 1 for the sampling locations map.

Each core sample collected was inspected and photographed.

Characteristics were recorded on Sediment Core Logs.

Locations 4-9 were divided into three sections- “A”, “B” and “C”. The “A” section was comprised of the material from the surface to project depth. The “B” section was comprised of the first six inches of the material below the dredging depth (sediment that will be exposed after dredging).

The “C” section was comprised of the six inches of material below the “B” section (this would represent an alternative bottom if the sediment in the “B” sections are found to be contaminated).

It should be noted that chemical and physical analyses were only performed on the “A” and “B” sections. The “C” section samples were reserved for the appropriate physical and chemical analyses only to be used if the “B” section samples were found to be contaminated. Both “A” and “B” sections were also subsampled for VOCs in the field and shipped directly to the analytical laboratory.

It should also be noted due to the physical appearance of the samples collected at locations 4 and 5 (both “A” and “B” segments), it was decided that quick percent sand and gravel analysis was needed to be conducted to determine if any were greater than 90% sand and gravel. All were found to be greater than 90% sand and gravel and as per the Proposed Sediment Sampling Plan were not included for chemical analysis.

Locations 1-3 were not divided into sections and were collected only for grain size analysis.

All samples were assigned unique ASI sample numbers. These samples were received in good condition at ASI in Flemington, NJ and stored at 2-4 °C.

The appendices contain all supporting documentation including sediment core logs (Appendix A), photographs (Appendix B), chains of custody (Appendix C), sample use forms (Appendix D), grain size distribution and percent moisture raw data (Appendix E), TOC raw data (Appendix F).

B. Homogenizing

Each of the A and B sections for locations 4 through 9 as well as the core samples for locations 1, 2 and 3 were carefully homogenized using a stainless steel mixer. This procedure followed the specific guidelines found on pages 9-11 and in Appendix A of the Dredging Manual and in ASI’s standard operating procedure SOP/PRP/008. Samples were mixed until uniform in color and texture.

C. Physical Analysis and Total Organic Carbon

Sub-samples of each homogenized core section for locations 4 through 9 were analyzed by ASI for percent moisture and grain size in accordance with the ASTM method D422-63, Standard Test Method for Particle-Size Analysis of Soils, re-approved 2002.

Total Organic Carbon (TOC) was also determined at ASI based on the guidance from EPA Office of Solids Waste and Emergency Response SW- 846 Method No. 9060 (Volume IC, Chapter 5, Revision 0, 9/86). The instrument for this analysis was the Teledyne Tekmar LSS Boat serial number (US18208024R) connected to Teledyne Tekmar Lotix Analyzer serial number (US18214013R).

Sub-samples of each homogenized core section for locations 1, 2, and 3, were analyzed by ASI for grain size in accordance with the ASTM method D422-63, Standard Test Method for Particle-Size Analysis of Soils, re-approved 2002.

See Appendix E for the grain size distribution and percent moisture raw data and Appendix F for the TOC raw data.

V. PHYSICAL ANALYSIS RESULTS

Sample identification numbers and the results of the analyses for percent moisture, grain size distribution, and total organic carbon for Locations 4-9 are provided in Table 2a. See Table 2b for the grain size distribution results for Locations 1-3.

Table 1. DGPS Coordinates

Core Name Northings Eastings

EC-1 311619.9 1382649.0

EC-2 311525.9 1382581.2

EC-3 311863.3 1382880.7

MC-4 310529.3 1384627.7

MC-5 310115.3 1384849.3

MC-6 308023.7 1385335.6

MC-7 306648.8 1386248.3

MC-8 305522.6 1386781.2

MC-9 305093.0 1387135.1

!. MC-9

MC-8

MC-7

MC-6

MC-5

MC-4

EC-3

EC-2

EC-1

Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community

1380000

1380000

1381000

1381000

1382000

1382000

1383000

1383000

1384000

1384000

1385000

1385000

1386000

1386000

1387000

1387000

1388000

1388000

1389000

1389000

Aqua Survey Inc.

469 Point Breeze Rd.

Flemington, NJ 08822

Tel: (908) 788-8700 Fax: (908) 788-9165 www.AquaSurvey.com

© OpenStreetMap (and) contributors, CC-BY-SA µ

ASI Project: 43-052

Coordinate System:

State Plane NAD 83 New York LI US Survey Foot

USACE-NYD

Mattituck Harbor

Sample Locations Map

0 600 1,200 1,800300

Feet

Figure 1. Sample Locations Map

Table 2a. Sample Identification, Grain Size Distribution (NJDEP Classification), Percent Moisture, and TOC

Table 2b. Sample Identification and Grain Size Distribution (USCS Classification)

Sample Name ASI # Gravel Sand Fines

Coarse

Fine

Total

Coarse

Med

Fine

Total

Silt

Clay

Total

EC-1 20230463 10.8 36.7 47.5 5.8 42.3 4.4 52.5 0.0

EC-2 20230464 6.5 25.8 32.3 13.1 51.1 3.4 67.6 0.1

EC-3 20230465 7.1 26.7 33.8 10.2 46.9 9.0 66.1 0.1

Sample Name ASI ID Total

Gravel

Total

Sand

Total Silt

Total

Clay

Moisture

TOC

ppm

% TOC

of Dry Weight

MC-4A 20230466a 1.6 91.6 4.3 2.5 21.85 3,496 0.35 MC-4B 20230466b 2.1 87.8 6.4 3.7 26.58 6,534 0.65 MC-5A 20230467a 10.3 84.8 2.7 2.2 19.51 1,764 0.18 MC-5B 20230467b 6.9 88.7 2.0 2.4 17.55 1,263 0.13 MC-6A 20230468a 0.0 6.4 68.8 24.8 55.60 19,669 1.97 MC-6B 20230468b 0.0 4.0 64.7 31.3 56.73 25,980 2.60 MC-7A 20230469a 0.0 5.8 66.4 27.8 56.59 20,659 2.07 MC-7B 20230469b 0.0 8.5 67.0 24.5 48.43 18,480 1.85 MC-8A 20230470a 0.0 2.3 63.3 34.4 65.24 25,559 2.56 MC-8B 20230470b 0.0 2.3 64.6 33.1 62.39 25,488 2.55 MC-9A 20230471a 1.4 79.3 11.5 7.8 26.60 7,040 0.70 MC-9A 20230471a dup 1.4 79.4 11.5 7.7 MC-9A 20230471a trp 1.5 79.3 11.4 7.8 MC-9B 20230471b 0.1 15.8 47.4 36.7 52.00 24,710 2.47 MC-9B 20230471b dup 51.37 MC-9B 20230471b trp 50.52

APPENDICES

Appendix A

Sediment Core Logs

Client : Project : Logger:

Job#: 43-052 Date: 6/8/23 Time: 1255 Crew:

Coordinates: N 311619.9 E 1382649.0 Vessel:

Core # : 1 Zone: NYLI Deploy: 1 2 3 -8.0 6.0 6.0

1.0 4.4 4.3

2.9 4.4 N/A -1.9 1.0 N/A

9.9

Sample Interval (ft.) Sample Id # Description Top 0.0

4.4

Bottom bucket hardliner cup other

Conditions: 3.0" 3.5" 8.0"

Comments: 4.0" Liner Type: Soft Hard

Vibracorer: P3 P5 VT6 Other N N Pushcorer N

Y Eckman Y

Photo Y Box Core

SEDIMENT CORE LOG

AQUA SURVEY, INC.

MLW #td ver 030615

Slambar

EST. Volume .25 gal/ft .33 gal/ft .50 gal/ft

Measured Water Depth [MWD] [ft.]:

Tide Adjust [TA] (+/- ft. from MLLW) [ft.]:

Ponar: Standard / Petite

Core Volumes Nominal core-barrel diameter

Debris Present

Required Sample Core Length [SCL] [ft.]:

Oil Present Live Organisms Present

Type of container:

# of containers:

Sample Length Retained (ft.):

Core Volume Retained (gal.):

AZ

JP

Sandusky

Y / N

Within 10% of Req'd Core Length

Odor Present

20230463 Tan sand, large gravel/shell frag. To refusal

06/09/23 - Deploy 2 recovery of 4.3 ft. down to refusal.

All Length Measurements are in Decimal Feet

Mattituck HarborUSACE-NYD

Project Depth (incl. 1 ft. Overdredge) [PD] [ft] MLLW:

Corrected Depth @ MLLW [ft.]:

Datum NAD 83

Collected to Project Depth:

Core Penetration Length (ft.):

Recovered Core Length (ft.):

Job#: 43-052 Date: 6/8/23 Time: 1314 Crew:

Coordinates: N 311525.9 E 1382581.2 Vessel:

Core # : 2 Zone: NYLI Deploy: 1 2 3 -8.0 5.5 6.1

1.5 4.8 4.2

3.2 4.8 N/A -1.7 1.0 N/A

9.7

Sample Interval (ft.) Sample Id # Description

4.8 bucket hardliner cup other

Conditions: 3.0" 3.5" 8.0"

Comments: 4.0" Liner Type: Soft Hard

Vibracorer: P3 P5 VT6 Other N N Pushcorer N

Y Eckman Y

Photo Y Box Core

SEDIMENT CORE LOG

AQUA SURVEY, INC.

MLW #td ver 030615

Slambar

EST. Volume .25 gal/ft

Ponar: Standard / Petite

Core Volumes Nominal core-barrel diameter

Debris Present

Required Sample Core Length [SCL] [ft.]:

Oil Present Live Organisms Present

Type of container:

# of containers:

Sample Length Retained (ft.):

Core Volume Retained (gal.):

AZ

JP

Sandusky

Y / N

20230464 Tan sand, large gravel/shell frag throughout to refusal.

06/09/23 - Deploy 2 - tan sand turning dark grey at 2.4 - 4.2

ft. To refusal.

All Length Measurements are in Decimal Feet

Mattituck HarborUSACE-NYD

Project Depth (incl. 1 ft. Overdredge) [PD] [ft] MLLW:

Corrected Depth @ MLLW [ft.]:

Datum NAD 83

Collected to Project Depth:

Core Penetration Length (ft.):

Job#: 43-052 Date: 6/8/23 Time: 1329 Crew:

Coordinates: N 311863.3 E 1382880.7 Vessel:

Core # : 3 Zone: NYLI Deploy: 1 2 3 -8.0 6.0 6.0

2.5 4.5 4.8

3.5 N/A 4.8

-1.0 N/A 1.0

9.0

Sample Interval (ft.) Sample Id # Description

4.5 bucket hardliner cup other

Conditions: 3.0" 3.5" 8.0"

Comments: 4.0" Liner Type: Soft Hard

Vibracorer: P3 P5 VT6 Other N N Pushcorer N

Y Eckman Y

Photo Y Box Core

SEDIMENT CORE LOG

AQUA SURVEY, INC.

MLW #td ver 030615

Slambar

EST. Volume .25 gal/ft

Ponar: Standard / Petite

Core Volumes Nominal core-barrel diameter

Debris Present

Required Sample Core Length [SCL] [ft.]:

Oil Present Live Organisms Present

Type of container:

# of containers:

Sample Length Retained (ft.):

Core Volume Retained (gal.):

AZ

JP

Sandusky

Y / N

20230465 Tan sand, large gravel/shell frag. To refusal.

06/09/23 -Deploy 2 - Tan & dark grey sand mix throughout, large gravel at bottom to 4.8 ft. To refusal.

All Length Measurements are in Decimal Feet

Mattituck HarborUSACE-NYD

Project Depth (incl. 1 ft. Overdredge) [PD] [ft] MLLW:

Corrected Depth @ MLLW [ft.]:

Datum NAD 83

Collected to Project Depth:

Core Penetration Length (ft.):

Job#: 43-052 Date: 6/9/23 Time: 1111 Crew:

Coordinates: N 310529.3 E 1384627.7 Vessel:

Core # : 4 Zone: NYLI Deploy: 1 2 3 -9.0 6.0

4.9 4.6

0.1 4.2

4.8 2.0

4.2

Sample Interval (ft.) Sample Id # Description

4.2

4.6 bucket hardliner cup other

Conditions: 3.0" 3.5" 8.0"

Comments: 4.0" Liner Type: Soft Hard

Vibracorer: P3 P5 VT6 Other N N Pushcorer

Y N Eckman

Y Photo Y Box Core

3 VOC

All Length Measurements are in Decimal Feet

Mattituck HarborUSACE-NYD

Project Depth (incl. 1 ft. Overdredge) [PD] [ft] MLLW:

Corrected Depth @ MLLW [ft.]:

Datum NAD 83

Collected to Project Depth:

Core Penetration Length (ft.):

Recovered Core Length (ft.):

20230466A

20230466B

Dark grey silty sand, becoming firmer w/ depth 0 - 4.2.

4.2 - 4.6 ft. grey clay, shell frag throughout.

20230466C

Sample Length Retained (ft.):

Core Volume Retained (gal.):

AZ

JP

Sandusky

Y / N

Type of container:

# of containers:

(0 - 3.2)

(3.2 - 3.7)

(3.7 - 4.2)

Measured Water Depth [MWD] [ft.]:

Tide Adjust [TA] (+/- ft. from MLLW) [ft.]:

Ponar: Standard / Petite

Core Volumes Nominal core-barrel diameter

Debris Present

Required Sample Core Length [SCL] [ft.]:

Oil Present Live Organisms Present

SEDIMENT CORE LOG

AQUA SURVEY, INC.

MLW #td ver 030615

Slambar

EST. Volume .25 gal/ft

Job#: 43-052 Date: 6/9/23 Time: 1147 Crew:

Coordinates: N 310115.3 E 1384849.3 Vessel:

Core # : 5 Zone: NYLI Deploy: 1 2 3 -9.0 8.0

2.8 6.8

0.3 6.5

2.5 2.5

6.5

Sample Interval (ft.) Sample Id # Description

3.8

4.3

6.8

Bottom bucket hardliner cup other

Conditions: 3.0" 3.5" 8.0"

Comments: 4.0" Liner Type: Soft Hard

Vibracorer: P3 P5 VT6 Other N N Pushcorer

Y Y Eckman Y

Photo Y Box Core

SEDIMENT CORE LOG

AQUA SURVEY, INC.

MLW #td ver 030615

Slambar

EST. Volume .25 gal/ft

Ponar: Standard / Petite

Core Volumes Nominal core-barrel diameter

Debris Present

Required Sample Core Length [SCL] [ft.]:

Oil Present Live Organisms Present

Type of container:

# of containers:

(0 - 5.5)

(5.5 - 6.0)

(6.0 - 6.5)

Sample Length Retained (ft.):

Core Volume Retained (gal.):

AZ

JP

Sandusky

Y / N

20230467A

20230467B

Dark grey sand, shell frag 0 - 3.8.

3.8 - 4.3 Grey/red sand mix.

4.3 - 6.8 Red sand to 6.8 refusal. 20230467C

3 VOC

Glass found throughout.

All Length Measurements are in Decimal Feet

Mattituck HarborUSACE-NYD

Project Depth (incl. 1 ft. Overdredge) [PD] [ft] MLLW:

Corrected Depth @ MLLW [ft.]:

Datum NAD 83

Collected to Project Depth:

Core Penetration Length (ft.):

Job#: 43-052 Date: 6/7/23 Time: 1347 Crew:

Coordinates: N 308023.7 E 1385335.6 Vessel:

Core # : 6 Zone: NYLI Deploy: 1 2 3 -9.0 8.0

8.7 5.8

4.7 5.0

4.0 2.5

5.0

Sample Interval (ft.) Sample Id # Description Top 0.0

4.0

5.8

Bottom bucket hardliner cup other

Conditions: 3.0" 3.5" 8.0"

Comments: 4.0" Liner Type: Soft Hard

Vibracorer: P3 P5 VT6 Other N N Pushcorer

Y N Eckman

Y Photo Y Box Core

SEDIMENT CORE LOG

AQUA SURVEY, INC.

MLW #td ver 030615

Slambar

EST. Volume .25 gal/ft

Ponar: Standard / Petite

Core Volumes Nominal core-barrel diameter

Debris Present

Required Sample Core Length [SCL] [ft.]:

Oil Present Live Organisms Present

Type of container:

# of containers:

(0 - 4.0)

(4.0 - 4.5)

(4.5 - 5.0)

Sample Length Retained (ft.):

Core Volume Retained (gal.):

AZ

JP

Sandusky

Y / N

20230468A

20230468B

Dark grey silt, firmer w/ depth 0 - 4.0.

4.0 - 5.9 dark grey silt, firmer w/ depth.

20230468C

3 VOC

All Length Measurements are in Decimal Feet

Mattituck HarborUSACE-NYD

Project Depth (incl. 1 ft. Overdredge) [PD] [ft] MLLW:

Corrected Depth @ MLLW [ft.]:

Datum NAD 83

Collected to Project Depth:

Core Penetration Length (ft.):

Job#: 43-052 Date: 6/7/23 Time: 1255 Crew:

Coordinates: N 306648.8 E 1386248.3 Vessel:

Core # : 7 Zone: NYLI Deploy: 1 2 3 -9.0 7.0

9.0 4.8

3.9 3.9

5.1 1.5

3.9

Sample Interval (ft.) Sample Id # Description Top 0.0

2.9

4.8

Bottom bucket hardliner cup other

Conditions: 3.0" 3.5" 8.0"

Comments: 4.0" Liner Type: Soft Hard

Vibracorer: P3 P5 VT6 Other N N Pushcorer

Y N Eckman

Y Photo Y Box Core

3 VOC

All Length Measurements are in Decimal Feet

Mattituck HarborUSACE-NYD

Project Depth (incl. 1 ft. Overdredge) [PD] [ft] MLLW:

Corrected Depth @ MLLW [ft.]:

Datum NAD 83

Collected to Project Depth:

Core Penetration Length (ft.):

Recovered Core Length (ft.):

20230469A

20230469B

Dark grey silt, firmer w/ depth 0 - 2.9.

2.9 - 4.8 Light grey clay.

20230469C

Sample Length Retained (ft.):

Core Volume Retained (gal.):

AZ

JP

Sandusky

Y / N

Type of container:

# of containers:

(0 - 2.9)

(2.9 - 3.4)

(3.4 - 3.9)

Measured Water Depth [MWD] [ft.]:

Tide Adjust [TA] (+/- ft. from MLLW) [ft.]:

Ponar: Standard / Petite

Core Volumes Nominal core-barrel diameter

Debris Present

Required Sample Core Length [SCL] [ft.]:

Oil Present Live Organisms Present

SEDIMENT CORE LOG

AQUA SURVEY, INC.

MLW #td ver 030615

Slambar

EST. Volume .25 gal/ft

Job#: 43-052 Date: 6/7/23 Time: 1137 Crew:

Coordinates: N 305522.6 E 1386781.2 Vessel:

Core # : 8 Zone: NYLI Deploy: 1 2 3 -9.0 6.0

7.5 4.3

2.2 3.7

5.3 1.5

3.7

Sample Interval (ft.) Sample Id # Description Top 0.0

4.3

Bottom bucket hardliner cup other

Conditions: 3.0" 3.5" 8.0"

Comments: 4.0" Liner Type: Soft Hard

Vibracorer: P3 P5 VT6 Other N N Pushcorer

Y N Eckman

Y Photo Y Box Core

5 jars VOC

All Length Measurements are in Decimal Feet

Mattituck HarborUSACE-NYD

Project Depth (incl. 1 ft. Overdredge) [PD] [ft] MLLW:

Corrected Depth @ MLLW [ft.]:

Datum NAD 83

Collected to Project Depth:

Core Penetration Length (ft.):

Recovered Core Length (ft.):

20230470A

20230470B

Dark grey silt, firmer w/ depth.

20230470C

Sample Length Retained (ft.):

Core Volume Retained (gal.):

AZ

JP

Sandusky

Y / N

Type of container:

# of containers:

(0 - 2.7)

(2.7 - 3.2)

(3.2 - 3.7)

Measured Water Depth [MWD] [ft.]:

Tide Adjust [TA] (+/- ft. from MLLW) [ft.]:

Ponar: Standard / Petite

Core Volumes Nominal core-barrel diameter

Debris Present

Required Sample Core Length [SCL] [ft.]:

Oil Present Live Organisms Present

SEDIMENT CORE LOG

AQUA SURVEY, INC.

MLW #td ver 030615

Slambar

EST. Volume .25 gal/ft

Job#: 43-052 Date: 6/7/23 Time: 1022 Crew:

Coordinates: N 305093.0 E 1387135.1 Vessel:

Core # : 9 Zone: NYLI Deploy: 1 2 3 -9.0 10.0

2.6 7.3

0.5 6.9

2.1 2.8

6.9

Sample Interval (ft.) Sample Id # Description Top 0.0

4.2

4.4

7.3

Bottom bucket hardliner cup other

Conditions: 3.0" 3.5" 8.0"

Comments: 4.0" Liner Type: Soft Hard

Vibracorer: P3 P5 VT6 Other N N Pushcorer

Y N Eckman

Y Photo Y Box Core

3 jars VOC

All Length Measurements are in Decimal Feet

Mattituck HarborUSACE-NYD

Project Depth (incl. 1 ft. Overdredge) [PD] [ft] MLLW:

Corrected Depth @ MLLW [ft.]:

Datum NAD 83

Collected to Project Depth:

Core Penetration Length (ft.):

Recovered Core Length (ft.):

20230471A

20230471B

0 - 4.2 - tan sand shell frag.

4.2 - 4.4 - sand/grey clay.

4.4 - 7.3 - grey clay.20230471C

Sample Length Retained (ft.):

Core Volume Retained (gal.):

AZ

JP

Sandusky

Y / N

Type of container:

# of containers:

(0 - 5.9)

(5.9 - 6.4)

(6.4 - 6.9)

Measured Water Depth [MWD] [ft.]:

Tide Adjust [TA] (+/- ft. from MLLW) [ft.]:

Ponar: Standard / Petite

Core Volumes Nominal core-barrel diameter

Debris Present

Required Sample Core Length [SCL] [ft.]:

Oil Present Live Organisms Present

SEDIMENT CORE LOG

AQUA SURVEY, INC.

MLW #td ver 030615

Slambar

EST. Volume .25 gal/ft

Appendix B

Photographs

Core 1, 0 – 2.0’, 06/08/23, ASI ID # 20230463

Core 1, 2.0’ – 4.4’, 06/08/23, ASI ID # 20230463

Core 2, 0 – 2.0’, 06/08/23, ASI ID # 20230464

Core 2, 2.0’ – 4.0’, 06/08/23, ASI ID # 20230464

Core 2, 4.0’ – 4.8’, 06/08/23, ASI ID # 20230464

Core 3, 0 – 2.0’, 06/09/23, ASI ID # 20230465

Core 3, 2.0’ – 4.0’, 06/09/23, ASI ID # 20230465

Core 3, 4.0’ – 4.8’, 06/09/23, ASI ID # 20230465

Core 4, 0 – 2.0’, 06/09/23, ASI ID # 20230466

Core 4, 2.0’ – 4.0’, 06/09/23, ASI ID # 20230466

Core 4, 4.0’ – 4.6’, 06/09/23, ASI ID # 20230466

Core 5, 0 – 2.0’, 06/09/23, ASI ID # 20230467

Core 5, 2.0’ – 4.0’, 06/09/23, ASI ID # 20230467

Core 5, 4.0’ – 6.0’, 06/09/23, ASI ID # 20230467

Core 5, 6.0’ – 6.8’, 06/09/23, ASI ID # 20230467

Core 6, 0 – 2.0’, 06/07/23, ASI ID # 20230468

Core 6, 2.0’ – 4.0’, 06/07/23, ASI ID # 20230468

Core 6, 4.0’ – 5.8’, 06/07/23, ASI ID # 20230468

Core 7, 0 – 2.0’, 06/07/23, ASI ID # 20230469

Core 7, 2.0’ – 4.0’, 06/07/23, ASI ID # 20230469

Core 7, 4.0’ – 4.8’, 06/07/23, ASI ID # 20230469

Core 8, 0 – 2.0’, 06/07/23, ASI ID # 20230470

Core 8, 2.0’ – 4.3’, 06/07/23, ASI ID # 20230470

Core 9, 0 – 2.0’, 06/07/23, ASI ID # 20230471

Core 9, 2.0’ – 4.0’, 06/07/23, ASI ID # 20230471

Core 9, 4.0’ – 6.0’, 06/07/23, ASI ID # 20230471

Core 9, 6.0’ – 7.3’, 06/07/23, ASI ID # 20230471

Appendix C

Chains of Custody

Appendix D

Sample Use Forms

Appendix E

Percent Moisture and Grain Size Distribution Raw Data, Calculations and Graphs

Balance: Mettler Calibration: x Yes No Client: USACE-NYD- Mattituck Harbor Drying Oven: Fisher 255G Temperature: 110 degrees C ASI Job # 43-052

Sample ID# Pan Weight g Wet Sample + Pan g Air Dry Sample First Oven Dry Sample Final Oven Dry Weight % Moisture* +Pan Weight g +Pan Weight g +Pan Weight g

20230466a 1.0324 47.2545 37.2566 37.1631 37.1556 21.85 20230466b 1.0407 46.6111 34.6573 34.5053 34.4986 26.58 20230467a 1.0403 54.1217 43.8577 43.7705 43.7644 19.51 20230467b 1.0554 52.3538 43.4269 43.3579 43.3530 17.55 20230468a 1.0448 38.2144 17.8820 17.5471 17.5438 55.60 20230468b 1.0436 41.9192 19.1769 18.7405 18.7313 56.73 20230469a 1.0406 41.0809 18.7971 18.4285 18.4207 56.59 20230469b 1.0265 37.0887 19.9530 19.6280 19.6235 48.43 20230470a 1.0370 36.8970 13.8290 13.5026 13.5004 65.24 20230470b 1.0354 35.9092 14.4705 14.1520 14.1490 62.39 20230471a 1.0374 45.1263 33.5730 33.3989 33.3961 26.60 20230471b 1.0435 37.0752 18.8108 18.3376 18.3305 52.00

20230471b dup 1.0475 30.9481 15.9757 15.5887 15.5828 51.37 20230471b trp 1.0348 35.6369 18.6043 18.1561 18.1482 50.52

* % Moisture = [(wet weight + pan) - (oven dry weight + pan)] [(wet weight + pan) - pan]

PERCENT MOISTURE

Appendix F

TOC Raw Data and SRM Control Charts

Report Information

Schedule: 070623 43-018 43-052 Samples Report Date: 7/6/2023 9:12:28 AM Instrument: Lotix - 1 Method: Solids TC Sample Source: Solids Module Calibration: 7/6/2023 9:04:51 AM Software Ver: 3.3.7431.18150 Comment:

Schedule Summary

Sample Type ID µg/g (ppm) Std Dev %RSD Clean Clean

Sample (TC) USGS 94234.087 6495.236 6.893 Clean Clean

Chk Std (TC) 1000.0000 ppmC 987.822 Passed 0.000 0.000

Clean Clean

Blank (TC) Blank 1663.329

(ABS) 208.456 12.532

Sample (TC) 20230498 1 43-018 10322.398 578.052 5.600 Clean Clean

Sample (TC) 20230498 SPK 43-018 20758.001 1638.429 7.893 Clean Clean

Sample (TC) 20230499 2 43-018 15475.649 558.193 3.607 Clean Clean

Sample (TC) 20230500 3 43-018 2046.639 121.355 5.929 Clean Clean

Sample (TC) 20230644 Composite 43-018 12380.614 1317.203 10.639 Clean Clean

Chk Std (TC) 1000.0000 ppmC 996.649 Passed 0.000 0.000

Clean Clean Sample (TC) 20230466A MC-4A 43-052 3496.339 9.498 0.272

Clean Clean Sample (TC) 20230466B MC-4B 43-052 6533.896 1022.071 15.643

Clean Clean Sample (TC) 20230467A MC-5A 43-052 1763.769 65.847 3.733

Clean Clean Sample (TC) 20230467B MC-5B 43-052 1132.858 312.442 27.580

Clean Clean Sample (TC) 20230467B MC-5B 43-052 1392.371 66.823 4.799

Clean Clean Sample (TC) 20230468A MC-6A 43-052 19669.454 247.872 1.260

Clean Clean Sample (TC) 20230468B MC-6B 43-052 25979.908 418.622 1.611

Clean Clean Sample (TC) 20230469A MC-7A 43-052 20659.135 1686.740 8.165

Clean Clean Sample (TC) 20230469B MC-7B 43-052 18479.978 1018.263 5.510

Clean Clean

Chk Std (TC) 1000.0000 ppmC 1010.587 Passed 7.429 0.735

Lotix Report: Samples Schedule created: 7/6/2023 9:12:28 AM Page 1 of 8 printed: 7/6/2023 4:56:55 PM

* 20230467B MC-5B 43-052: Due to >20% RSD, an additional two replicates were analyzed and included in the calculations. ppm: 1262.614 Std Dev: 237.650

%RSD: 18.822

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Sample Details

Sample Type ID Start- Time

Clean Clean 09:13 Rep

Analysis

Type Run Time (mm:ss)

1 TC 03:34

2 TC 02:30

3 TC 03:41

4 TC 03:22

Sample Type ID µg/g (ppm) ABS Std Dev %RSD Start-

Time Blank

Contrib Sample (TC) USGS 94234.087 27785.169 6495.236 6.893 09:26 1729.550

Rep

Analysis Type

Weight mg (Volume µl) µg µg/g

(ppm)

NDIR

(ABS)

Baseline

(ABS)

Run Time (mm:ss)

1 TC 0.420 38.64673 92016.025 20982.300 4.366 04:50

2 TC…