AppI_Pre-Design Sediment Sampling by Weston Solutions.pdf

APPENDIX I

PRE-DESIGN SEDIMENT SAMPLING AT IR SITE 7, DATED

DECEMBER 2007 BY WESTON SOLUTIONS, INC. (DRAFT

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Draft Report

Pre-Design Sediment Sampling

IR Site 7 (West Basin)

Sediment Remediation Project

Port of Long Beach, California

Prepared for

The Port of Long Beach

925 Harbor Plaza

Long Beach, CA 90802

Prepared by

Weston Solutions, Inc.

2433 Impala Drive

Carlsbad, California 92010

December 2007

Draft Report, Pre-Design Sediment Sampling at IR

Site 7, The Port of Long Beach

December 2007

TABLE OF CONTENTS

TABLE OF CONTENTS

1.0 INTRODUCTION

1.1 Background

1.2 Site History

1.3 Sampling and Testing Objectives

2.0 MATERIALS AND METHODS

2.1 Field Collection Program for Sediment Core Samples

2.1.1 Sampling Locations and Depths

2.1.2 Navigation

2.1.3 Core Collection and Handling

2.1.4 Site Water

2.1.5 Decontamination of Equipment

2.1.6 Sample Processing and Storage

2.1.7 Shipping/Transport

2.2 Documentation and Chain-of-Custody (C-O-C)

2.3 Physical and Chemical Analyses

2.3.1 Physical Analyses

2.3.2 Sediment Chemistry

2.3.3 Sediment Elutriate and Site Water Chemistry

2.3.4 Comparison to Sediment Management Objectives, Regulatory Levels, Sediment

Quality Guidelines

2.3.5 Comparison to Water Quality Objectives

2.4 Quality Assurance/Quality Control

2.4.1 Field Collection and Sample Handling

2.4.2 Chemical and Physical Analyses

3.0 RESULTS

3.1 Sediment Sample Collection and Handling

3.2 Results of Physical and Chemical Analyses

3.2.1 Physical and Chemical Characteristics of Sediments in IR Site 7

3.2.2 Chemical Characteristics of Elutriates and Site Water

3.3 Quality Control Results

3.3.1 Physical Analysis of Sediments

3.3.2 Chemical Analysis

4.0 CONCLUSIONS

5.0 REFERENCES

APPENDICES

Appendix A – Field Core Logs and Photographs

Appendix B – Chain of Custodies

Appendix C – Chemistry

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TABLE OF CONTENTS

LIST OF TABLES

Table 1. Core Locations, Target Lengths, Number of Cores, Composite ID, and Analyses for

Samples Collected by Vibracore

Table 2. Point of Contact Information for Analytical Laboratories

Table 3. Field Coordinates and Sampling Depths of Sediment Core Samples

Table 4. Comparison of Actual vs. Target Core Locations and Lengths

Table 5. Summary of Total Solids and Metals in Station AOEC A-01 and AOEC A-02 and a

Comparison to Long Beach Naval Station Sediment Management Objectives

Table 6. Summary of Total Solids and Metals in Station AOEC A-03 and AOEC A-04 and a

Comparison to Long Beach Naval Station Sediment Management Objectives

Table 7. Summary of Total Solids and Metals in Station AOEC A-05 and AOEC A-06 and a

Comparison to Long Beach Naval Station Sediment Management Objectives

Table 8. Summary of Total Solids and Metals in Station AOEC A-07 and AOEC CE-01 and a

Comparison to Long Beach Naval Station Sediment Management Objectives

Table 9. Summary of Total Solids and Metals in Station AOEC CE-02 and AOEC CE-03 and a

Comparison to Long Beach Naval Station Sediment Management Objectives

Table 10. Summary of Total Solids and Metals in Station AOEC CE-04 and AOEC CE-05 and a

Comparison to Long Beach Naval Station Sediment Management Objectives

Table 11. Summary of Total Solids and Metals in Station AOEC CE-06 and AOEC CE-07 and a

Comparison to Long Beach Naval Station Sediment Management Objectives

Table 12. Summary of Total Solids and Metals in Station AOEC CE-08 and AOEC CE-09 and a

Comparison to Long Beach Naval Station Sediment Management Objectives

Table 13. Summary of Total Solids and Metals in Station AOEC CW-01 and AOEC CW-02 and a Comparison to Long Beach Naval Station Sediment Management Objectives

Table 14. Summary of Total Solids and Metals in Station AOEC CW-03 and AOEC CW-04 and a Comparison to Long Beach Naval Station Sediment Management Objectives

Table 15. Summary of Total Solids and Metals in Station AOEC CW-05 and AOEC CW-06 and a Comparison to Long Beach Naval Station Sediment Management Objectives

Table 16. Summary of Total Solids and Metals in Station AOEC CW-07 and AOEC CW-08 and a Comparison to Long Beach Naval Station Sediment Management Objectives

Table 17. Summary of Total Solids and Metals in Station AOEC CW-09 and AOEC CW-10 and a Comparison to Long Beach Naval Station Sediment Management Objectives

Table 18. Summary of Grain Size Analysis of IR Site 7 Project Sediment

Table 19. Summary of Physical/Chemical Analysis of IR Site 7 Project Sediment Composites and a Comparison to Long Beach Naval Station Sediment Management Objectives

Table 20. Summary of Physical/Chemical Analysis of IR Site 7 Project Sediment Elutriates and

Site Water and a Comparison to California Ocean Plan Water Quality Objectives

Table 21. Results of Matrix Spike/Matrix Spike Duplicate (MS/MSD) Analyses of Sediment

Table 22. Results of Matrix Spike/Matrix Spike Duplicate (MS/MSD) Analyses of Elutriates

Prepared From Site Water and Project Sediment

LIST OF FIGURES

Figure 1. Overview of Project Area within IR Site 7, the Port of Long Beach

Figure 2. Sampling Locations within Area A, IR Site 7, the Port of Long Beach

Figure 3. Sampling Locations within Area C East, IR Site 7, the Port of Long Beach

Figure 4. Sampling Locations within Area C West, IR Site 7, the Port of Long Beach

Figure 5. Electric Vibracore Sampler

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ABBREVIATIONS AND ACRONYMS

ABBREVIATIONS AND ACRONYMS

AOEC area of ecological concern

APHA American Public Health Association

ASTM American Society for Testing and Materials

Bechtel Bechtel National, Inc.

Cal/EPA California Environmental Protection Agency

Calscience Calscience Environmental Laboratories

C-O-C chain-of-custody

CVAFS cold vapor atomic fluorescence spectrophotometry

DDT dichlorodiphenyltrichloroethane

DGPS Differential Global Positioning System

DTSC Department of Toxic Substances Control

ER-L effects range – low

ER-M effects range – median

GC-MS gas chromatography - mass spectrometry

GC-ECD gas chromatography - electron capture detection

ICP-MS inductively coupled plasma – mass spectrometry

ID identification

IR Installation Restoration

LBNS Long Beach Naval Station

MEC MEC Analytical Systems, Inc.

MLLW mean lower low water

MDL method detection limit

MRL method reporting limit

PAH polycyclic aromatic hydrocarbon

PCB polychlorinated biphenyl

POLB Port of Long Beach

QA/QC quality assurance/quality control

RIA Regional Implementation Agreement

SAP sampling and analysis plan

SET standard elutriate test

SIM selective ion monitoring

SM Standard Methods

SMOs sediment management objectives

SOP standard operating procedure

SWRCB State Water Resources Control Board

TTLC total threshold limit concentration

USACE United States Army Corps of Engineers

USACE-LA United States Army Corps of Engineers, Los Angeles District

USEPA United States Environmental Protection Agency

Weston Weston Solutions, Inc.

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UNITS OF MEASURE

UNITS OF MEASURE

cm centimeter cy cubic yards oC centigrade ft feet or foot

L liter m meter mg/kg milligram per kilogram mL milliliter µg/L microgram per liter µg/kg microgram per kilogram ng/L nanogram per liter

December 2007

INTRODUCTION

1.0 INTRODUCTION

1.1 Background

As a consequence of over 50 years of shipping and industrial uses by the U.S. Navy’s Long Beach operations, elevated concentrations of contaminants (i.e., heavy metals, polychlorinated biphenyls

[PCBs], and polycyclic aromatic hydrocarbons [PAHs]) have been measured in sediments from the

Installation Restoration (IR) Site 7 (West Basin) area in the Port of Long Beach (POLB). Because sediments from IR Site 7 may pose ecological risks to benthic organisms, an environmental remediation project is necessary to remove contaminated sediments from the area.

In accordance with a Lease in Furtherance of Conveyance (LIFOC) with the Navy, POLB will be conducting the remedial activities. POLB has entered into a Consent Agreement with the California EPA

Department of Toxic Substances Control (DTSC), who will ensure that remediation activities comply with State environmental regulations and the Record of Decision for the site. The Record of Decision was executed in September 2007.

Current plans include the removal of material from two Areas of Ecological Concern (AOECs) requiring remediation, as identified by the Navy and previously established as part of a Remedial

Investigation/Feasibility Study conducted by Bechtel National, Inc. (Bechtel 2003). Potential dredged material will then be used as slip fill at Pier G, in accordance with the Navy’s Proposed Plan and the existing Army Corps of Engineers (ACOE) permit for the Pier G slip fill. However, prior to design and removal, it is necessary to evaluate and quantify the potential dredged material for its suitability for use as slip fill material.

As a result, sediment sampling and analyses were conducted following the procedures in the approved

Sampling and Analysis Plan (SAP) to further delineate the extent of vertical and horizontal sediment contamination in AOEC A and AOEC C. Sediment chemical concentrations from these samples were evaluated against applicable criteria:

! Title 22 of the California Code of Regulations for the classification for hazardous material, and

! Sediment management objectives (SMOs) established for the Long Beach Naval Station (LBNS).

In addition, sediment elutriate and site water (collected as a means of comparison) chemical concentrations were compared to California Ocean Plan’s water quality objectives, or daily maximum limiting concentrations (State Water Resources Control Board [SWRCB], Cal/EPA 2006).

The study location, IR Site 7, incorporates the area bounded by Pier T to the north and by the southern extent of Terminal Island and the Navy Mole (Figure 1). This area comprises approximately 700 acres of the POLB. Within IR Site 7, AOEC C comprises 62 acres between Piers 10 and 15, with water depths ranging from -40 to -45 ft mean lower low water (MLLW). AOEC A comprises 15 acres between Pier T, Pier Echo, and the former Pier 1, with water depths at approximately -40 to -50 ft MLLW.

1.2 Site History

Previous studies have characterized sediments in the project area (Bechtel 1995; Bechtel 2003) and in nearby portions of the West Basin (MEC Analytical, Inc. [MEC] 1996a-d; Toxscan 1996; MEC 1999;

Bechtel 2003). These studies demonstrated that surface sediments (less than 5 ft in depth) along the docks and piers were contaminated with PAHs, dichlorodiphenyltrichloroethanes [DDTs], PCBs, and heavy metals. However, central areas of the basin were less contaminated; in these areas, the principle contaminants of concern are PAHs. Bioassay testing with amphipods (Rhepoxynius abronius) and a

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INTRODUCTION

polychaete worm (Neanthes arenaceodentata) demonstrated poor survival in many of the areas where elevated concentrations of surface contaminants were measured (Bechtel 1995), but high survival in more central areas of the West Basin (MEC 1999). Toxicity to R. abronius was elevated in the area surrounding

Pier 12 (Fuel Pier), found within the current project area (AOEC C East and West).

Sediment sampling and analyses performed in IR Site 7 as part of the feasibility study in 1998 demonstrated similar results to previous investigations in the project areas (Bechtel 2003). Within AOEC

A, one of the present study’s project areas, mercury was significantly elevated (4.7 mg/kg) above the sediment quality objective or ER-M value (0.71 mg/kg) to a depth of approximately 5 ft; however, no significant biological effects were detected in toxicity tests with echinoderms, amphipods or polychaetes.

In AOEC C, also one of the present study’s project areas, mercury, lead, PAHs (i.e., benzo(a)pyrene and high molecular weight PAHs), and total PCBs were elevated in surface sediments to approximately 3 feet deep. In additional to elevated chemicals, toxicity to echinoderms, as well as benthic community effects, were observed in sediments from AOEC C.

Existing contamination likely remains in the surface sediments within the project areas. Specifically, although industrial activities in the West Basin have ceased, there is little flushing in the project area and sedimentation rates may be too low to bury existing contamination. Thus, in areas adjacent to docks and piers, additional testing was necessary to more accurately delineate the contamination in surface and subsurface sediments within the areas to be dredged.

1.3 Sampling and Testing Objectives

The purpose of this investigation was to delineate the vertical and horizontal sediment contamination (i.e., metals, PAHs, PCBs, and DDTs) within three areas of IR Site 7 (AOEC A, AOEC C-East, AOEC C-

West) of the POLB, and to evaluate the suitability of this material for use as slip fill material at Pier G.

Figure 1. Overview of Project Area within IR Site 7, the Port of Long Beach1

Bathymetry is depicted in color

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2.0 MATERIALS AND METHODS

2.1 Field Collection Program for Sediment Core Samples

2.1.1 Sampling Locations and Depths

The areas proposed for dredging, AOEC A, AOEC C-East, and AOEC C-West, are located in the IR Site

7 (West Basin) area of submerged lands, most of which were reverted to the POLB after closure of the

Long Beach Naval Complex (Figure 1). Sampling was conducted at 26 coring locations within the three areas: 7 locations in AOEC A (Figure 2), 9 locations in AOEC C-East (Figure 3), and 10 locations in

AOEC C-West (Figure 4). All cores from each of the 26 locations were collected using an electric vibracore sampler. Samples in AOEC A were collected to a depth of 11 ft below mudline or until refusal;

samples in AOEC C were collected to a depth of 8 ft below the mudline or refusal. The retrieved cores were sectioned into discrete 1 ft intervals and a subsample from each 1 ft interval was analyzed for metals. A composite of all depth intervals from each sampling location was prepared and analyzed for particle size (i.e., grain size) distribution. Three area-wide composite samples were created and analyzed for metals, total DDTs, total PAHs, and total PCBs. In addition, the three area-wide composites were evaluated in standard chemical elutriate tests to evaluate potential water quality impacts associated with dredging. The number of cores, core identification (ID) numbers, locations, and target lengths are provided in Table 1.

The sampling depths selected encompass the maximum depths at which the Navy detected contamination exceeding sediment management objectives plus an approximate two-foot overdredge depth to account for any over-dredged material collected during the sediment removal activities.

2.1.2 Navigation

Pre-plotted station positions were located using the research vessel (R/V) Early Bird II’s Differential

Global Positioning System (DGPS), accurate to less than 10 ft (3 m). All final station locations were recorded in the field using positions from the DGPS.

2.1.3 Core Collection and Handling

Cores were collected using an electric vibracore (Figure 5) that was deployed from R/V Early Bird II. The vibracore was equipped with a 4-inch (~10 cm) outer diameter aluminum barrel and stainless steel catcher to retain sediment. A new polyethylene liner was inserted into the tube prior to sampling at each station to eliminate the possibility of cross contamination between stations. Following sampling, the vibracore was retrieved to the deck of the boat and the liner with sediment core removed from the aluminum tube and placed in a tray for processing. The liner was then cut vertically along the length of the sediment core and each core examined by a qualified scientist and photographed. The geologic description of each core included the texture, odor, color, length, and any evident stratification of the sediment; this information was documented in a core log (Appendix A).

All sediment cores were collected to the appropriate depths unless operational problems or rocks were encountered. If operational problems or rocks were encountered, additional cores were attempted until a successful core was collected.

Draft Report, Pre-Design Sediment Sampling at IR Site 7, The Port of

Long Beach

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Figure 2. Sampling Locations within Area A, IR Site 7, the Port of Long Beach2

2 Bathymetry depicted in color

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Figure 3. Sampling Locations within Area C East, IR Site 7, the Port of Long Beach

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Figure 4. Sampling Locations within Area C West, IR Site 7, the Port of Long Beach

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Table 1. Core Locations, Target Lengths, Number of Cores, Composite ID, and Analyses for Samples

Collected by Vibracore

Station ID

Latitude

(WGS 84)

Longitude

(WGS 84)

Water

Depth

(ft

MLLW)

Target

Core

Length

( ft below mudline)

Project

Depth

(ft

MLLW)

Metals

Analysis

Grain

Size

Analysis

Analysis for Metals, PAHs, PCBs, DDTs

A-01 33° 45.366 -118° 13.488 -42.5 -11 -53.5 1 per ft, 11/core 1 per core

A-02 33° 45.355 -118° 13.541 -54.0 -11 -65.0 1 per ft, 11/core 1 per core

A-03 33° 45.32 -118° 13.582 -54.9 -11 -65.9 1 per ft, 11/core 1 per core

A-04 33° 45.305 -118° 13.515 -54.5 -11 -65.5 1 per ft, 11/core 1 per core

A-05 33° 45.264 -118° 13.443 -48.9 -11 -59.9 1 per ft, 11/core 1 per core

A-06 33° 45.238 -118° 13.493 -52.5 -11 -63.5 1 per ft, 11/core 1 per core

A-07 33° 45.23 -118° 13.533 -52.5 -11 -63.5 1 per ft, 11/core 1 per core

1 per Area

AOEC A

CW-01 33° 44.675 -118° 14.035 -49.2 -8 -57.2

1 per ft, 8

/core 1 per core

CW-02 33° 44.612 -118° 14.05 -49.0 -8 -57.0

1 per ft, 8

/core 1 per core

CW-03 33° 44.731 -118° 14.089 -48.8 -8 -56.8

1 per ft, 8

/core 1 per core

CW-04 33° 44.672 -118° 14.108 -48.6 -8 -56.6

1 per ft, 8

/core 1 per core

CW-05 33° 44.727 -118° 14.131 -48.0 -8 -56.0

1 per ft, 8

/core 1 per core

CW-06 33° 44.596 -118° 14.194 -46.2 -8 -54.2

1 per ft, 8

/core 1 per core

CW-07 33° 44.656 -118° 14.207 -46.5 -8 -54.5

1 per ft, 8

/core 1 per core

CW-08 33° 44.704 -118° 14.205 -42.0 -8 -50.0

1 per ft, 8

/core 1 per core

CW-09 33° 44.665 -118° 14.262 -45.5 -8 -53.5

1 per ft, 8

/core 1 per core

CW-10 33° 44.608 -118° 14.273 -45.0 -8 -53.0

1 per ft, 8

/core 1 per core

1 per Area

AOEC CW

CE-01 33° 44.672 -118° 14.685 -52.8 -8 -60.8

1 per ft, 8

/core 1 per core

CE-02 33° 44.621 -118° 13.681 -51.0 -8 -59.0

1 per ft, 8

/core 1 per core

CE-03 33° 44.654 -118° 13.773 -50.5 -8 -58.5

1 per ft, 8

/core 1 per core

CE-04 33° 44.599 -118° 13.763 -49.7 -8 -57.7

1 per ft, 8

/core 1 per core

CE-05 33° 44.667 -118° 13.862 -49.8 -8 -57.8

1 per ft, 8

/core 1 per core

CE-06 33° 44.608 -118° 13.841 -49.5 -8 -57.5

1 per ft, 8

/core 1 per core

CE-07 33° 44.573 -118° 13.897 -49.7 -8 -57.7

1 per ft, 8

/core 1 per core

CE-08 33° 44.656 -118° 13.933 -49.0 -8 -57.0

1 per ft, 8

/core 1 per core

CE-09 33° 44.585 -118° 13.949 -49.5 -8 -57.5

1 per ft, 8

/core 1 per core

1 per Area

AOEC CE

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2.1.4 Site Water

In addition to the core samples, site water was collected on the last day of sampling near station CW-01, within IR Site 7. Site water was submitted for chemical analysis and for use in the preparation of sediment elutriates as described below.

2.1.5 Decontamination of Equipment

All vibracore equipment was cleaned prior to sampling. Between stations, core barrels and the deck of the vessel were rinsed with site water and new polyethylene core tube liners were used at each sample location. Before creating each core and area composite, all stainless steel utensils (stainless steel bowls, spoons, spatulas, mixers, and other utensils) were cleaned with soapy water, rinsed with tap water, and then rinsed three times with deionized water.

2.1.6 Sample Processing and Storage

Sediment cores from each station (up to 8 or 11 ft) were sectioned into 1 ft intervals. One subsample representing each 1 ft interval was placed in a 100 mL glass jar with Teflon-lined lid, and submitted to

Calscience Environmental Laboratories (Calscience) for metals analysis. Another 100 mL sample representing each 1 ft interval was collected for archiving in case additional analyses were required.

A 500 mL subsample of sediment from each 1 ft interval was placed into a stainless steel bowl and homogenized with stainless steel utensils to prepare a core composite. A subsample of each core composite (200 mL) was placed into double Ziploc bags and analyzed by Weston Solutions, Inc.

(Weston) Benthic Laboratory in Carlsbad for grain size. Another 500 mL of each core composite sample was placed into a glass jar with Teflon-lined lid and archived.

One subsample (500 mL) from each of the core composite samples created in one area (Ex. AOEC A) was placed into a stainless steel bowl and homogenized to prepare an area-wide composite sample. This was performed separately for each of the areas (AOEC A, AOEC C-East, and AOEC C-West) to create three separate area-wide composite samples. A subsample (500 mL) of each area composite was then placed in glass jars with Teflon-lined lids and submitted to Calscience for analysis of chemical constituents (metals, PAHs, PCBs, DDTs). Another 500 mL of each area composite was archived. An additional 2 L of each area composite, and 60 L of site water from each area was sent to Calscience for the preparation of sediment elutriate samples and chemical analyses, as described in Section 2.3.3.

Samples were labeled, placed on ice, and shielded from light until delivered to Calscience or Weston laboratory personnel for analyses. Any sediment not immediately analyzed was stored at 4°C at Weston’s laboratory in Carlsbad until chemical and grain size characterization was complete.

Sediment and water samples that are not used as part of this project will be stored for up to one year after the project is complete. At this time, any remaining samples or material generated as part of this project will be considered contaminated and disposed of by submitting the material to Kinsbursky Environmental

Management (KEM), for hazardous waste disposal.

2.1.7 Shipping/Transport

Prior to shipping or transport, sample containers were securely packed inside the cooler with ice. Chain-of-custody (COC) forms were filled out as described in section 2.2, and the original signed COC forms were placed in a sealable plastic bag and placed inside the cooler. The cooler lids were securely taped shut. Samples were delivered to the analytical laboratory for analysis. The particular analyses performed by each laboratory and the point of contact and relevant shipping information are listed in Table 2.

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Table 2. Point of Contact Information for Analytical Laboratories

Laboratory Analyses Performed Point of Contact Shipping Information

Weston Solutions, Inc. Grain size

Dr. David Moore

Ms. Sheila Holt

(760) 795-6900

Weston Solutions, Inc.

2433 Impala Dr.

Carlsbad, CA 92010

Calscience

Environmental

Laboratories, Inc.

Sediment and Elutriate

Chemistry

Mr. Bob Stearns

(714) 895-5494

Calscience

7440 Lincoln Way

Garden Grove, CA

92841-1427

2.2 Documentation and Chain-of-Custody (C-O-C)

This section describes the program requirements for sample handling and C-O-C procedures. Samples are considered to be in custody if they are: (1) in the custodian’s possession or view, (2) retained in a secured place

(under lock) with restricted access, or (3) placed in a secured container. The principal documents used to identify samples and to document possession are C-O-C records, field log books, and field tracking forms.

C-O-C procedures will be used for all samples throughout the collection, transport, and analytical process, and for all data and data documentation, whether in hard copy or electronic format.

C-O-C procedures were initiated during sample collection. A C-O-C record was provided with each sample or sample group. C-O-C forms are provided in Appendix B. Each person who had custody of the samples signed the form to ensure that the samples were not left unattended unless properly secured.

Minimum documentation of sample handling and custody included the following:

! Sample identification

! Sample collection date and time

! Any special notations on sample characteristics

! Initials of the person collecting the sample

! Date the sample was sent to the laboratory

! Shipping company and waybill information

The completed C-O-C form was placed in a sealable plastic envelope that traveled inside the ice chest containing the listed samples. The C-O-C form was signed by the person transferring custody of the samples.

The condition of the samples was recorded by the receiver. C-O-C records are included in the final analytical report prepared by the laboratory, and are considered an integral part of that report.

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Figure 5. Electric Vibracore Sampler

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2.3 Physical and Chemical Analyses

Physical and chemical analytes to be measured in this testing program were selected to provide data on potential chemicals of concern in IR Site 7 sediments, as specified in the sampling and analysis plan

(SAP; Weston 2007). All analytical methods used to obtain contaminant concentrations follow USEPA or

Standard Methods (SM). In addition, chemical and physical measures selected for this evaluation are consistent with those recommended for assessing dredged material in the Los Angeles area

(USEPA/USACE 1991; USEPA Region IX/USACE-LA 1993).

2.3.1 Physical Analyses

Physical analyses of the sediment included grain size on each core composite, to determine the general size classes that make up the sediment (e.g., gravel, sand, silt, and clay) at each station location. Grain size was assessed using the gravimetric procedure described in Plumb (1981). The frequency distribution of the size ranges (reported in millimeters [mm]) of the sediment was also calculated. Total solids were also measured to convert concentrations of the chemical analytes from a wet-weight to a dry-weight basis according to SM 2540G (American Public Health Association [APHA] et al. 1992).

2.3.2 Sediment Chemistry

The analyses for priority pollutant metals (except mercury) were conducted using an inductively coupled plasma emissions spectrometer equipped with a mass detector (ICP-MS), in accordance with USEPA

6020M. Mercury analyses were conducted using cold vapor atomic fluorescence spectrophotometry

(CVAFS) in accordance with USEPA 7471A. PAHs were analyzed using gas chromatography-mass spectrometry with selective ion monitoring (GC-MS SIM) according to USEPA Method 8270M. This method followed a serial extraction with methylene chloride and alumina and gel permeation column cleanup procedures. PCBs were identified as Aroclors and DDTs were measured using gas chromatography-electron capture detection (GC-ECD) according to USEPA Methods 8081A and

8081A/8082, respectively.

2.3.3 Sediment Elutriate and Site Water Chemistry

Elutriate samples were prepared by using a standard elutriate test (SET) method. The analysis of the metals, PAHs, PCBs, and DDTs was similar to those methods described above.

2.3.4 Comparison to Sediment Management Objectives, Regulatory Levels, Sediment

Quality Guidelines

Sediment chemical concentrations in this study were compared to sediment management objectives established for the LBNS, and for reference only, regulatory levels, or total threshold limit concentrations

(TTLCs) and sediment quality guidelines (effects range – low [ER-L] and effects range – median [ER-M] levels).

2.3.4.1 Sediment Management Objectives – LBNS

As part of the remedial investigation (RI) and feasibility study (FS) conducted by Bechtel (1995, 2003), sediment management objectives were developed for use and design of remedial actions that may involve removal of sediments from the site, and for use in determining whether target sediments have been suitably removed after completion of such remedial activities.

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2.3.4.2 Regulatory Levels

TTLCs indicate the level above which material must be managed as hazardous waste upon removal, in accordance with the Title 40 CFR part 261 and Title 22 of the California Code of Regulations.

2.3.4.3 Sediment Quality Guidelines

Because the ER-L and ER-M sediment quality values are not regulatory standards, these values are included for reference only. These guidelines, developed by Long et al. (1995), are helpful in assessing the potential significance of elevated sediment-associated contaminants of concern, in conjunction with biological analyses. Briefly, the effects range values were developed from a large data set where results of both benthic organism effects (e.g., toxicity tests, benthic assessments) and chemical concentrations were available for individual samples. To derive these guidelines, the chemical values for paired data demonstrating benthic impairment were sorted in according to ascending chemical concentration. The 10th percentile of this rank order distribution was identified as the ER-L and the 50th percentile as the ER-M.

While these values are useful for identifying elevated sediment-associated contaminants, they should not be used to infer causality because of the inherent variability and uncertainty of the approach.

2.3.5 Comparison to Water Quality Objectives

Elutriate and site water analyte results were compared to the California Ocean Plan’s water quality objectives (SWRCB, Cal/EPA 2006).

2.4 Quality Assurance/Quality Control

Weston’s quality assurance/quality control (QA/QC) staff performs periodic audits to ensure that test conditions, data collection, and test procedures are conducted in accordance with Weston’s standard operating procedures (SOPs). Weston’s SOPs have been audited and approved by an independent

USEPA-approved laboratory and placed in the QA file as well as laboratory files.

2.4.1 Field Collection and Sample Handling

All relevant project and sample information and field measurements were recorded on customized water-proof core log data forms. A daily field log was maintained, and formal chain-of-custody procedures followed and documented. The DGPS system was verified daily by comparing accuracy with known landmarks. All sampling equipment was cleaned between sample stations. Samples were double-bagged, and both inner and outer bags labeled. Samples were held on ice until transport to Weston in Carlsbad, California or to the analytical laboratory. COC forms were prepared in the field during sediment collection by Weston personnel.

2.4.2 Chemical and Physical Analyses

Chemical analyses were performed using QC criteria specified in Methods for Chemical Analysis of

Water and Wastes (USEPA 1983) and Test Methods for Evaluating Solid Waste (SW-846) (USEPA

2004), in a California state-certified and nationally-accredited laboratory (California ELAP Certification

#1230 and NELAP Certification #03220CA). Grain size analyses performed by Weston were consistent with internal QC criteria. Performance objectives were evaluated via the use of standard reference materials or laboratory control samples, method blanks, surrogates, spiked samples, duplicate samples, and internal QC samples. Precision and accuracy objectives were established for method reporting limits

(MRLs), spike recoveries, and duplicate analyses.

December 2007

RESULTS

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3.0 RESULTS

3.1 Sediment Sample Collection and Handling

Vibracore sampling was conducted June 26 to June 28. The weather was warm and sampling was conducted primarily under clear skies and calm seas.

Field coordinates, depth of penetration relative to the mudline (i.e., the sediment surface), depth of recovery relative to the mudline, and core length retained for each station location are summarized in

Table 3. The actual length of the cores slightly differs from the target lengths because of differences in the actual bathymetry and the historical bathymetry used to calculate target core lengths (Table 4). Field core logs, core photos, and associated documentation for the sampling effort are provided in Appendix A.

Table 3. Field Coordinates and Sampling Depths of Sediment Core Samples

S ta ti o n

I D

A tt em p t

L a ti tu d e

L o n g it u d e

D a te

T im e

W a te r D ep th

(f t

M L

L W

T a rg et

S a m p li n g D

M L

L W

A ct u a l

S a m p li n g D

M L

L W

P en et ra ti o n ft

F in a l

C o re

L en g th ft

C o re L en g

R et a in ed f o r

A n a ly si s t)

C m m en ts

A-01 1 33° 45.366 -118° 13.488 6/26/07 9:59 -42.5 -53.5 -48.5 13.0 6.0 0.0 bent tube-

A-01 2 33° 45.366 -118° 13.488 6/26/07 11:00 -42.5 -53.5 -53.8 12.0 11.3 11.0

A-02 1 33° 45.355 -118° 13.541 6/26/07 14:01 -54.0 -65.0 -64.0 12.0 10.0 10.0

A-03 1 33° 45.320 -118° 13.582 6/26/07 15:01 -54.9 -65.9 -59.9 12.0 5.0 0.0 rock caught in catcher head-no sample

A-03 2 33° 45.32 -118° 13.585 6/26/07 15:22 -55.0 -66.0 -56.5 12.0 1.5 0.0 hit rock pile-no sample

A-03 3 33° 45.317 -118° 13.575 6/26/07 15:39 -53.0 -64.0 -63.0 12.0 10.0 10.0

A-04 1 33° 45.305 -118° 13.515 6/26/07 16:43 -54.5 -65.5 -62.5 12.5 8.0 8.0

A-05 1 33° 45.264 -118° 13.443 6/26/07 12:01 -48.9 -59.9 -59.9 12.0 11.0 11.0

A-06 1 33° 45.238 -118° 13.493 6/27/07 9:14 -52.5 -63.5 -63.5 12.0 11.0 11.0

A-07 1 33° 45.23 -118° 13.533 6/27/07 10:08 -52.5 -63.5 -61.0 11.5 8.5 8.5

CE-01 1 33° 44.672 -118° 14.685 6/27/07 17:48 -52.8 -60.8 -61.3 10.0 8.5 8.0

CE-02 1 33° 44.621 -118° 13.681 6/27/07 17:13 -51.0 -59.0 -59.0 11.0 8.0 8.0

CE-03 1 33° 44.654 -118° 13.773 6/27/07 16:41 -50.5 -58.5 -58.5 11.0 8.0 8.0

CE-04 1 33° 44.599 -118° 13.763 6/27/07 15:54 -49.7 -57.7 -57.7 10.5 8.0 8.0

CE-05 1 33° 44.667 -118° 13.862 6/27/07 15:02 -49.8 -57.8 -57.3 10.5 7.5 7.5

CE-06 1 33° 44.608 -118° 13.841 6/27/07 14:26 -49.5 -57.5 -57.5 10.5 8.0 8.0

CE-07 1 33° 44.573 -118° 13.897 6/27/07 13:26 -49.7 -57.7 -58.2 10.5 8.5 8.0

CE-08 1 33° 44.656 -118° 13.933 6/27/07 12:02 -49.0 -57.0 -57.0 10.5 8.0 8.0

CE-09 1 33° 44.585 -118° 13.949 6/27/07 11:09 -49.5 -57.5 -57.5 10.5 8.0 8.0

CW-01 1 33° 44.675 -118° 14.035 6/28/07 15:43 -49.2 -57.2 -57.2 11.0 8.0 8.0

CW-02 1 33° 44.612 -118° 14.050 6/28/07 14:59 -49.0 -57.0 -57.0 11.0 8.0 8.0

CW-03 1 33° 44.731 -118° 14.089 6/28/07 14:15 -48.8 -56.8 -57.3 11.0 8.5 8.0

CW-04 1 33° 44.672 -118° 14.108 6/28/07 13:33 -48.6 -56.6 -56.6 11.0 8.0 8.0

CW-05 1 33° 44.727 -118° 14.131 6/28/07 12:45 -48.0 -56.0 -55.0 10.5 7.0 7.0

CW-06 1 33° 44.596 -118° 14.194 6/28/07 11:09 -46.2 -54.2 -54.7 11.0 8.5 8.0

CW-07 1 33° 44.656 -118° 14.207 6/28/07 10:30 -46.5 -54.5 -54.5 11.0 8.0 8.0

CW-08 1 33° 44.704 -118° 14.205 6/28/07 9:49 -42.0 -50.0 -49.0 10.5 7.0 7.0

CW-09 1 33° 44.665 -118° 14.262 6/28/07 9:01 -45.5 -53.5 -52.5 10.5 7.0 7.0

CW-10 1 33° 44.608 -118° 14.273 6/28/07 8:24 -45.0 -53.0 -53.0 10.5 8.0 8.0

December 2007

RESULTS

Weston Solutions, Inc. 15

Table 4. Comparison of Actual vs. Target Core Locations and Lengths S ta ti o n

I D

T a rg et

L a ti tu d e

(d m m .m m m

(W G

S

A ct u a l L a ti tu d e

(d d m m .m m m

(W G

S

T a rg et

L o n g it u m m .m m m

(W G

S

A ct u a l L o n g it u m m .m m m

(W G

S

T a rg et

C g th ft

A ct u a l C g th

C o ll ec te

C re L en g

R et a in ed f o r

A n a ly si s

A-01 33° 45.366 33° 45.366 -118° 13.488 -118° 13.488 11 11.3 11

A-02 33° 45.355 33° 45.355 -118° 13.541 -118° 13.541 11 10 10

A-03 33° 45.320 33° 45.317 -118° 13.582 -118° 13.575 11 10 10

A-04 33° 45.305 33° 45.305 -118° 13.515 -118° 13.515 11 8 8

A-05 33° 45.264 33° 45.264 -118° 13.443 -118° 13.443 11 11 11

A-06 33° 45.238 33° 45.238 -118° 13.493 -118° 13.493 11 11 11

A-07 33° 45.230 33° 45.230 -118° 13.533 -118° 13.533 11 8.5 8.5

CE-01 33° 44.672 33° 44.672 -118° 14.685 -118° 14.685 8 8.5 8

CE-02 33° 44.621 33° 44.621 -118° 13.681 -118° 13.681 8 8 8

CE-03 33° 44.654 33° 44.654 -118° 13.773 -118° 13.773 8 8 8

CE-04 33° 44.599 33° 44.599 -118° 13.763 -118° 13.763 8 8 8

CE-05 33° 44.667 33° 44.667 -118° 13.862 -118° 13.862 8 7.5 7.5

CE-06 33° 44.608 33° 44.608 -118° 13.841 -118° 13.841 8 8 8

CE-07 33° 44.573 33° 44.573 -118° 13.897 -118° 13.897 8 8.5 8

CE-08 33° 44.656 33° 44.656 -118° 13.933 -118° 13.933 8 8 8

CE-09 33° 44.585 33° 44.585 -118° 13.949 -118° 13.949 8 8 8

CW-01 33° 44.675 33° 44.675 -118° 14.035 -118° 14.035 8 8 8

CW-02 33° 44.612 33° 44.612 -118° 14.050 -118° 14.050 8 8 8

CW-03 33° 44.731 33° 44.731 -118° 14.089 -118° 14.089 8 8.5 8

CW-04 33° 44.672 33° 44.672 -118° 14.108 -118° 14.108 8 8 8

CW-05 33° 44.727 33° 44.727 -118° 14.131 -118° 14.131 8 7 7

CW-06 33° 44.596 33° 44.596 -118° 14.194 -118° 14.194 8 8.5 8

CW-07 33° 44.656 33° 44.656 -118° 14.207 -118° 14.207 8 8 8

CW-08 33° 44.704 33° 44.704 -118° 14.205 -118° 14.205 8 7 7

CW-09 33° 44.665 33° 44.665 -118° 14.262 -118° 14.262 8 7 7

CW-10 33° 44.608 33° 44.608 -118° 14.273 -118° 14.273 8 8 8

3.2 Results of Physical and Chemical Analyses

3.2.1 Physical and Chemical Characteristics of Sediments in IR Site 7

Results of physical and chemical analyses for project sediment are presented in Table 5 through Table 19.

All results are expressed in dry weight unless otherwise indicated. Target detection limits are provided in the SAP (Weston 2007). The actual detection limits and raw data for the analyses are provided in

Appendix C.

The following discussion of the findings indicates where sediment samples exceed the LBNS sediment management objectives (SMOs). This information is the basis for the design of the remediation project.

December 2007

RESULTS

Weston Solutions, Inc. 16

Effects range values (ER-Ls and ER-Ms) and hazardous waste characterization (TTLC) data are included on the results tables for reference only.

3.2.1.1 Area AOEC A

Metals and Total Solids in 1 ft Intervals

Copper, lead, mercury and zinc were detected at concentrations greater than the LBNS SMO value only in the top three feet of sediment with the exception of stations AOEC A-04 and AOEC A-05 where mercury and zinc exceeded the LBNS SMO value as deep as four feet.

Total solids ranged from 48% at station A-04 0-1 ft to 79.1% at station A-02 6-7 ft.

Grain Size

Sediment within Area AOEC A ranged from 25.9% fine-grained materials (19.7% silt and 6.23% clay) at station A-03 to 81.6% (57.5% silt and 24.1% clay) at station A-04 (Table 17).

Area Wide Composite Sediment Chemistry Metals were the only chemical detected in Area AOEC A sediment (Table 19). Arsenic, copper, mercury, nickel, and zinc were detected at concentrations below LBNS SMOs. Concentrations of heavy metals of concern ranged from below the detection limit (<0.502 mg/kg, Selenium) to 156 mg/kg for zinc. Several

PAHs were detected, but all were at concentrations below the reporting limit. No pesticides or Aroclors were detected. Total Solids were measured at 61.3%.

3.2.1.2 Area AOEC CE

Metals and Total Solids in 1 ft Intervals

No metals were detected at concentrations in exceedances of their respective LBNS SMOs or TTLC regulatory levels. Total solids ranged from 53.1% at station CE-09 0-1 ft to 79.1% at station A-02 6-7 ft.

Grain Size

Sediment within Area AOEC CE ranged from 15.1% fine-grained materials (11.3% silt and 3.78% clay) at station CE-03 to 48.8% (32.5% silt and 16.3% clay) at station CE-01 (Table 17).

Area Wide Composite Sediment Chemistry

Metals were the only chemical detected in Area AOEC CE sediment but were below LBNS SMO values.

Concentrations of heavy metals of concern ranged from below the detection limit (<0.499 mg/kg for

Selenium) to 88.8 mg/kg for zinc. Several PAHs were detected, but all were at concentrations below the reporting limit. No pesticides or Aroclors were detected. Total Solids were measured at 61.7%.

3.2.1.3 Area AOEC CW

Metals and Total Solids in 1 ft Intervals

In Area AOEC CW, copper, lead, mercury, and zinc were detected at concentrations greater than the LBNS SMO value only in the top four feet of sediment. Total solids ranged from 43.6% at station

CW-06 0-1 ft to 80.6% at station CW-04 5-6 ft.

Grain Size Sediment within Area AOEC CW ranged from 31.3% fine-grained materials (17.3% silt and 14.0% clay) at station CW-02 to 74.0% (58.6% silt and 15.4% clay) at station CW-03 (Table 17).

Area Wide Composite Sediment Chemistry

December 2007

RESULTS

Weston Solutions, Inc. 17

Metals were the only chemical detected in Area AOEC CW sediment, but were below LBNS SMO values. Concentrations of heavy metals of concern ranged from below the detection limit (<0.485, Selenium) to 195 mg/kg for zinc. Several PAHs were detected, but all were at concentrations below the reporting limit. No pesticides or Aroclors were detected. Total Solids were measured at 63.4%.

AOEC A-01 AOEC A-02

ER-L ER-M TTLC

LBNS

SMOs A-01 0-1 A-01 1-2 A-01 2-3 A-01 3-4 A-01 4-5 A-01 5-6 A-01 6-7 A-01 7-8 A-01 8-9 A-01 9-10 A-01 10-11 A-02 0-1 A-02 1-2 A-02 2-3 A-02 3-4 A-02 4-5 A-02 5-6

- - - - 66.4 70.5 72.2 73.3 68.8 75.7 71.5 70 70.4 70.5 71.8 48.1 54.8 73 70 72.1 70.3 79.1 77.1 76.4 73.6

Arsenic 0.1 8.2 70 500 - 12.1 5.46 4.36 4.06 20.8 7.8 4.87 12.2 8.7 9.31 8.44 19.4 37.6 10.5 11.8 7.16 8.35 4.

Cadmium 0.1 1.2 9.6 100 - 0.654 0.105J 0.0932J 0.0858J 0.21 0.137 0.140J 0.152 <0.142 0.137J 0.133J 1.1 1.9 0.416 0.288 0.156 0.28 0.0776J 0.0361J 0.121J

Chromium 0.1 81 370 500 - 42.8B 21.1B 15.0B 17.7B 32.7B 29.2B 32.3B 41.7B 39.6B 40.2B 40.7B 87.8B 84.1B 33.5B 34.2B 22.6B 38.9B 15.5B 11.0B 20.0B 23.3B

Copper 0.1 34 270 2500 254 177 25.4 8.56 11.6 45.7 32.8 36.8 42 38.7 40.2 43.3 337 568 603 64.8 50.5 103 27.

Lead 0.1 46.7 218 1000 100 151 28.3 2.38 2.92 10 6.4 6.98 9.22 8.27 8.55 8.67 116 133 83.6 18 10.5 21 5.

Mercury 0.02 0.15 0.71 20 0.9 0.722 0.0564 <0.0278 <0.0273 0.111 0.0812 <0.0280 0.0704 0.0686 0.0874 0.0698 0.635 3.04 1.45 0.166 0.109 0.13 0.0804 <0.0260 0.0859 0.0583

Nickel 0.1 20.9 51.6 2000 - 23.5 13.8 10.3 12.6 26.5 23.7 26.5 30.9 28.1 29.5 29.3 42.8 43.9 20.2 25.8 17 19.9 11.

- - 100 - 0.872 0.704J 0.574J 0.77 1.05 1.02 1.06 1.7 1.33 1.45 1.35 0.791J 0.730J 0.495J <0.440 0.671J <0.438 <0

Silver 0.1 1 3.7 500 3.5 0.414 0.0555J 0.0208J 0.0227J 0.105J 0.0698J 0.0679J 0.152 0.133J 0.133J 0.138J 0.966 1.06 0.222 0.154 0.0839J 0.0908J 0.0398J <0.0

Zinc 0.1 150 410 5000 307 243 68.9 36.4 47.5 87.2 88.4 92.5 106 96.2 100 99.4 377 423 145 126 72.9 145 46.7 28.9 54.7 72

Table 6. Summary of Total Solids and Metals in Station AOEC A-03 and AOEC A-04 and a Comparison to Long Beach Naval Station Sediment Management Objectives

AOEC A-03 AOEC A-04

ER-L ER-M TTLC

LBNS

SMOs A-03 0-1 A-03 1-2 A-03 2-3 A-03 3-4 A-03 4-5 A-03 5-6 A-03 6-7 A-03 7-8 A-03 8-9 A-03 9-10 A-04 0-1 A-04 1-2 A-04 2-3 A-04 3-4 A-04 4-5 A-04 5-6 A-04 6-7 A-04 7-8

- - - - 67.1 68.4 58.9 76 73.6 74.6 76.7 72.4 71.8 71.5 48 49.7 61.8 61.6 65.7 67.9 71.8 75.3

Arsenic 0.1 8.2 70 500 - 11.3 15.4 21.8 3.74 2.75 2.33 1.96 1.58 1.45 1.54 19.9 28.1 11.1 21.3 15.9 11.2 9.56 9.9

Cadmium 0.1 1.2 9.6 100 - 1.78 3.17 3.28 0.192 0.065J 0.216 0.0547J 0.0552J 0.0454J 0.0336J 0.983 1.95 1.01 0.969 0.306 0.199 0.217 0.222

Chromium 0.1 81 370 500 - 126B 102B 145B 18.0B 20.0B 31.7B 23.7B 20.6B 17.8B 18.9B 82.9B 101B 55.9B 65.2B 41.8B 34.2B 30.8B 38.4B

Copper 0.1 34 270 2500 254 365 440 377 29 22.7 39.6 25.7 21.6 20.1 16.6 234 430 309 228 54.2 36.4 44.5 50

Lead 0.1 46.7 218 1000 100 449 283 422 32.8 8.06 11 6.63 4.3 3.94 3.43 87 111 71 59.2 16 10.2 11.4 12.1

Mercury 0.02 0.15 0.71 20 0.9 0.199 0.325 0.763 0.0312 0.0247J 0.0987 0.143 0.0577 <0.0181 <0.0182 0.567 1.1 2.47 1.7 0.16 0.1 0.108 0.0597

Nickel 0.1 20.9 51.6 2000 - 26.8 30.7 43.5 12.9 23.7 31 20.8 17.6 15.2 14.9 45.9 50.2 33.1 40.9 32.5 25.9 23.1 31.9

- - 100 - 1.58 0.699J <0.523 <0.405 <0.418 <0.413 <0.401 <0.425 <0.429 <0.430 1.01J 3.24 1.46 2.28 2.44 0.489J <0.453 <0.429

Silver 0.1 1 3.7 500 3.5 0.43 1.57 0.894 0.0693J 0.045J 0.0777J 0.0399J 0.0322J 0.0322J 0.0241J 0.813 1.05 1.11 0.517 0.526 0.162 0.0963J 0.109J

Zinc 0.1 150 410 5000 307 746 1020 1590 90.3 73.6 80.7 64.1 55.9 57.6 56.8 324 416 298 225 111 90.9 84.3 104

* All values in dry weight except where noted.

Yellow Highlight/Bold outline around cell = the measured concentration exceeds the analyte’s respective LBNS SMOs value.

< = Below the method detection limit indicated.

B= Analyte was present in associated method blank.

J = Estimated value; value between the MDL and the reporting limit

AOEC A-05 AOEC A-06

LBNS

SMOs A-05 0-1 A-05 1-2 A-05 2-3 A-05 3-4 A-05 4-5 A-05 5-6 A-05 6-7 A-05 7-8 A-05 8-9 A-05 9-10 A-05 10-11 A-06 0-1 A-06 1-2 A-06 2-3 A-06 3-4 A-06 4-5 A-06 5-6 A-06 6-7

- - - - 56.9 61.1 62.1 57.5 64.2 55.1 68 63.6 64.1 70.5 74.9 55.5 55.8 54.9 67.4 76.7 78.4 76.5 71.6 70.1 70.7 72

Arsenic 0.1 8.2 70 500 - 20.6 14.9 12.8 15.7 15.9 19.3 13.6 17.2 13.4 8.36 11.3 22.3 30.6 17.8 13.4 5.66 9.47 6.99

Cadmium 0.1 1.2 9.6 100 - 0.967 0.931 2.13 2.69 0.598 0.526 0.326 0.487 0.317 0.181 0.213 1.35 1.24 1.4 0.385 <0.130 0.147 <0.131

Chromium 0.1 81 370 500 - 95.1B 69.4B 56.5B 49.3B 38.1B 45.7B 42.2B 44.2B 44.3B 28.8B 34.2B 75.2B 72.4B 60.4B 32.8B 15.4B 30.9B 28.8B 28.0B 28.8B 23.1B

Copper 0.1 34 270 2500 254 177 183 149 143 58.8 69.9 55.9 61.9 57 31.7 42.2 212 244 202 55.3 13.2 38.3 30.7 34.3

Lead 0.1 46.7 218 1000 100 158 52.5 47.1 43.4 21.1 28.6 16.1 26.2 20 9.3 11.7 93.8 110 62.5 20.2 3.24 7.59 4.92 5.82 6.64 4.46 6.63

Mercury 0.02 0.15 0.71 20 0.9 0.66 2 0.694 0.627 0.338 0.166 0.154 0.137 0.0698 0.0374 0.0495 0.605 0.901 1.2 0.108 0.156 0.0443 <0.0262 0.0322 <0

Nickel 0.1 20.9 51.6 2000 - 71.4 79.1 53.8 56.4 32.9 35.7 34.5 35.7 35.6 22.5 27.7 42.2 45.9 45.9 27.5 12.3 27 26.4

- - 100 - <0.541 0.531J 1.42 3.22 0.692J 1.28 0.607J <0.484 0.483J <0.437 0.546J 0.951 1.04 1.96 0.517J <0.401 <0.393 <0.402 <0.430 <0.

Silver 0.1 1 3.7 500 3.5 0.519 0.378 0.462 0.752 0.255 0.312 0.171 0.253 0.193 0.0897J 0.124J 0.807 0.756 0.747 0.212 0.0318J 0.0777J 0.0396J 0.0442J 0.039

Zinc 0.1 150 410 5000 307 348 198 185 504 117 131 118 130 121 76.2 88.2 303 314 230 103 42.6 82.7 77

Table 8. Summary of Total Solids and Metals in Station AOEC A-07 and AOEC CE-01 and a Comparison to Long Beach Naval Station Sediment Management Objectives

AOEC A-07 AOEC CE-01

ER-L ER-M TTLC

LBNS

SMOs A-07 0-1 A-07 1-2 A-07 2-3 A-07 3-4 A-07 4-5 A-07 5-6 A-07 6-7 A-07 7-8 A-07 8-9 CE-01 0-1 CE-01 1-2 CE-01 2-3 CE-01 3-4 CE-01 4-5 CE-01 5-6 CE-01 6-7 CE-01 7-8

- - - - 54.6 57.3 58.3 69.5 75.6 76 76.4 76.3 76.1 54.9 65.9 68.7 63.7 77.4 74.7 74.7 71.1

Arsenic 0.1 8.2 70 500 - 15.7 25.8 20.1 12.7 6.4 5.35 4.12 4.39 5.2 19.4 10.1 9.43 12.7 6.17 5.32 12 13.7

Cadmium 0.1 1.2 9.6 100 - 1.13 2.93 1.91 0.853 0.243 0.243 0.0236J 0.0378J 0.125J 0.819 0.312 0.438 0.605 0.121J 0.101J 0.164 0.297

Chromium 0.1 81 370 500 - 59.6B 97.0B 86.0B 52.5B 35.6B 24.8B 20.4B 20.1B 27.1B 71.8B 37.9B 37.5B 43.5B 25.3B 16.4B 20.4B 27.4B

Copper 0.1 34 270 2500 254 196 303 323 161 57.2 40.1 19.2 20.9 27.7 154 56.2 50.7 65.5 21 15.3 18.6 38.9

Lead 0.1 46.7 218 1000 100 74.1 310 122 61.6 27 18.9 4.25 5.22 6.81 67.5 19.5 10.9 14.7 6.09 4.58 4.86 8.88

Mercury 0.02 0.15 0.71 20 0.9 0.376 1.14 2.47 0.353 0.144 0.0883 <0.0170 <0.0170 0.0614 0.569 0.284 0.111 0.149 0.0656 0.0311 <0.0268 0.196

Nickel 0.1 20.9 51.6 2000 - 36.4 51.6 45.4 35.1 31.7 20.4 17.5 17.9 24.1 41.3 26.1 29.7 35.1 19 13.4 16.7 23.8

- - 100 - 0.978 1.07 1.37 1.01 0.41J <0.405 <0.403 <0.403 <0.404 <0.467 0.658J 0.651J <0.398 <0.412 <0.412 <0.433 <0.467

Silver 0.1 1 3.7 500 3.5 0.589 1.43 0.833 0.37 0.103J 0.1J <0.0191 <0.0191 0.0326J 0.208 0.123J 0.168 0.0703J 0.0509J 0.0729J 0.0996J 0.208

Zinc 0.1 150 410 5000 307 303 991 538 240 124 122 63.6 60.9 73.8 256 109 103 122 63.5 46.1 54.9 82.3

* All values in dry weight except where noted.

Yellow Highlight/Bold outline around cell = the measured concentration exceeds the analyte’s respective LBNS SMOs value.

< = Below the method detection limit indicated.

AOEC CE-02 AOEC CE-03

LBNS

SMOs CE-02 0-1 CE-02 1-2 CE-02 2-3 CE-02 3-4 CE-02 4-5 CE-02 5-6 CE-02 6-7 CE-02 7-8 CE-03 0-1 CE-03 1-2 CE-03 2-3 CE-03 3-4 CE-03 4-5 CE-03 5-6 CE-03 6-7 CE-03 7-8

NA - - - - 59.3 62.8 74.4 73.3 71.1 71.2 70.8 70.8 61.7 66.2 72 72.6 73.3 78.5 76.9 75.1

Arsenic 0.1 8.2 70 500 - 11.8 8.67 5.34 5.9 4.83 3.61 19.5 3.05 15.2 11.6 4.23 2.96 2.45 3.02 5.4 14.8

Cadmium 0.1 1.2 9.6 100 - 0.455 0.268 0.0801J 0.126J <0.0249 0.73 0.119J 0.0539J 0.562 0.399 0.111J 0.0646J 0.443 0.152 0.0296J 0.0442J

Chromium 0.1 81 370 500 - 48.4B 32.5B 32.0B 27.4B 20.6B 40.2B 28.8B 20.3B 59.2B 44.9B 17.2B 18.9B 16.5B 13.3B 13.0B 14.6B

Copper 0.1 34 270 2500 254 106 35.2 36.1 35.4 22.3 55.8 36.9 21.5 101 67.7 10.9 21.8 16.8 12 13.1 14.8

Lead 0.1 46.7 218 1000 100 48.2 10.8 6.69 7.71 3.89 10.6 6.41 4.2 46 29.4 3.41 4.95 3.24 2.48 2.45 2.7

Mercury 0.02 0.15 0.71 20 0.9 0.403 0.188 0.0559 0.0586 0.0402 0.123 0.0495 <0.0283 0.384 0.157 0.0325 0.0478 0.0374 0.0195J 0.0332 0.0207J

Nickel 0.1 20.9 51.6 2000 - 28.2 24.2 28.7 23.7 18.8 33.2 25.1 17.5 36.4 28.9 12.1 14.8 13.5 11.9 11.4 12.6

- - 100 - 1.94 <0.490 <0.414 <0.420 <0.433 <0.432 <0.435 <0.435 0.795J <0.465 <0.427 <0.424 <0.420 <0.392 <0.400 <0.410

Silver 0.1 1 3.7 500 3.5 0.447 0.147J 0.0372J 0.0721J <0.0205 0.382 0.057J <0.0206 0.449B 0.303B 0.0313J 0.0384J 0.125J 0.0664J <0.0190 <0.0194

Zinc 0.1 150 410 5000 307 183 85.9 89.1 80.6 59.9 113 76.5 57.3 209 139 47.2 54.5 47 34.3 40 45.7

Table 10. Summary of Total Solids and Metals in Station AOEC CE-04 and AOEC CE-05 and a Comparison to Long Beach Naval Station Sediment Management Objectives

AOEC CE-04 AOEC CE-05

ER-L ER-M TTLC

LBNS

SMOs CE-04 0-1 CE-04 1-2 CE-04 2-3 CE-04 3-4 CE-04 4-5 CE-04 5-6 CE-04 6-7 CE-04 7-8 CE-05 0-1 CE-05 1-2 CE-05 2-3 CE-05 3-4 CE-05 4-5 CE-05 5-6 CE-05 6-7 CE-05 7-8

NA - - - - 55.2 63.9 73.4 73.9 70.9 76.6 76 73.5 61.6 61.5 73.5 74.1 75.6 70.7 77.3 78.3

Arsenic 0.1 8.2 70 500 - 18.4 20.3 7.49 7.89 4.66 2.84 2.47 8.1 16.1 16.8 5.67 2.49 3.29 2.38 1.8 1.64

Cadmium 0.1 1.2 9.6 100 - 0.737 0.936 0.308 0.196 0.0941J <0.0231 <0.0233 <0.0241 0.505 0.441 0.141 0.0278J <0.0234 0.0497J 0.0373J 0.0261J

Chromium 0.1 81 370 500 - 72.2B 62.1B 30.5B 24.0B 23.7B 16.1B 13.4B 24.5B 60.3B 55.1B 18.7B 15.5B 14.0B 15.2B 14.3B 14.3B

Copper 0.1 34 270 2500 254 153 130 37 28.3 27.7 15.1 12.4 28.5 111 68.3 16.5 15.8 13.1 14.6 13.8 13.8

Lead 0.1 46.7 218 1000 100 74.9 63 18.2 8.54 6.43 3.09 2.77 4.35 55.9 22.9 6.77 4.08 2.6 3.45 2.91 2.75

Mercury 0.02 0.15 0.71 20 0.9 0.62 0.808 0.109 0.0723 0.375 0.191 0.0211J 0.027J 0.426 0.228 0.0573 0.0406 0.0245J 0.0661 0.038 0.029

Nickel 0.1 20.9 51.6 2000 - 40.6 39.5 22.8 18.3 20.5 13.6 11 22.1 35 40.4…