contract no. ep‐w‐09‐009 work assignment no. … feasibility study fom field operations...

United States Environmental Protection AgencyUnited States Environmental Protection AgencyGowanus Canal Phase 3 RI/FS

Borough of BrooklynKings County, New York

Contract No. EP‐W‐09‐009Work Assignment No. 013‐RICO‐02ZP

May 2010

EPA WORK ASSIGNMENT NUMBER: 013-RICO-02ZP

EPA CONTRACT NUMBER: EP-W-09-009

HDR

RAC 2 PROGRAM

DRAFT

REMEDIAL INVESTIGATION/FEASIBILITY STUDY WORK PLAN

GOWANUS CANAL PHASE 3 RI/FS

RISK ASSESSMENT SAMPLING, UPLAND WELL INVESTIGATION, AND CULTURAL RESOURCES

BROOKLYN, KINGS COUNTY, NEW YORK

MAY 2010

Prepared by: Reviewed by: Mike Musso, P.E. Bradley Williams, PhD. Project Manager RAC 2 Program Manager HDR HDR Approved by: Richard McCollum RAC 2 Quality Assurance Officer HDR

Table of Contents 1.0. Introduction ...................................................................................................................... 6

1.1. Purpose ................................................................................................................. 7 1.2. Site Description .................................................................................................... 7 1.3. Background .......................................................................................................... 7

2.0. Task Descriptions and Assumptions ........................................................................... 8 2.1. Task 1: Project Planning and Support .............................................................. 8

2.1.1. Subtask 1.1 Project Administration/Management ............................ 8 2.1.2. Subtask 1.4 Develop Draft Work Plan and Associated Cost Estimate 8 2.1.3. Subtask 1.5 Negotiate and Revise Draft Work Plan/Budget ........... 9 2.1.4. Subtask 1.6 Evaluate Existing Data and Documents ......................... 9 2.1.5. Subtask 1.7 Quality Assurance Project Plan ....................................... 9 2.1.6. Subtask 1.8 Health and Safety Plan ................................................... 11 2.1.7. Subtask 1.9 Non-RAS Analyses .......................................................... 11 2.1.8. Subtask 1.11 Subcontract Procurement ............................................. 11 2.1.9. Subtask 1.12 Perform Subcontract Management ............................. 12

2.2. Task 2 Community Relations ........................................................................... 13 2.2.1. Subtask 2.3 Public Information Meeting Support ............................ 13 2.2.2. Subtask 2.4 Fact Sheet Preparation .................................................... 13 2.2.3. Subtask 2.6 Public Notices .................................................................. 13

2.3. Task 3 Field Investigation ................................................................................ 13 2.3.1. Subtask 3.3 Ecological and Human Health Risk Assessment Sampling 14 2.3.2. Subtask 3.4 Upland Well Investigation ............................................. 24 2.3.3. Subtask 3.5 Groundwater Sampling .................................................. 29 2.3.4 Subtask 3.6 Cultural Resources Tasks ............................................... 32 2.3.5. Subtask 3.7 Investigation Derived Waste Characterization and Disposal .............................................................................................................. 33

2.4. Task 4 Sample Analysis .................................................................................... 35 2.4.1. Subtask 4.1 Sample Analysis............................................................... 35

2.5. Task 5 Analytical Support and Data Validation ........................................... 35 2.5.1. Subtask 5.1 Collect, Prepare, and Ship Samples .............................. 35 2.5.2. Subtask 5.2 Sample Management ....................................................... 35 2.5.3. Subtask 5.3 Data Validation ................................................................ 36

3.0. Project Management Approach .................................................................................. 36 3.1. Project Organization ......................................................................................... 36 3.2. Project Schedule ................................................................................................. 36 3.3. Cost Estimate...................................................................................................... 37

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Attachment 1 Figures

Figure 1 - Proposed Surface Sediment and Surface Water Sample Locations Figure 2 - Proposed Surface Sediment and Surface Water Reference Locations Figure 2a - Proposed Surface Sediment and Surface Water Reference Locations (zoomed to reference locations) Figure 3 - Proposed Tissue Sampling Areas Figure 4 - Proposed Air Monitoring Locations Figure 5 - Proposed Monitoring Well Locations

Tables

Table 1 - Summary of Phase 3 sampling program Table 2 - Detailed list of Phase 3 samples Table 3 – Target Analyte Lists

Appendices

A QAPP (draft to be submitted under separate cover) B HASP (draft to be submitted under separate cover)

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Acronyms

APE Area of Potential Effects AVS/SEM Acid Volatile Sulfide/Simultaneously Extractable Metals CAMP Community Air Monitoring Program CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CFR Code of Federal Regulations CLP Contract Laboratory Program CO Contracting Officer DESA Division of Environmental Science and Assessment EPA United States Environmental Protection Agency FS Feasibility Study FOM Field Operations Manager GEI GEI Consultants, Inc. GIS Geographic Information System GPS Global Positioning System HASP Health and Safety Plan HDPE High Density Poly Ethylene HDR Henningson, Durham & Richardson Architecture & Engineering, P.C. in

association with HDR Engineering, Inc. HHRA Human Health Risk Assessment IDW Investigation Derived Waste LOE Level-of-Effort NAPL Non Aqueous Phase Liquid NCP National Contingency Plan NRHP National Register of Historic Places NYCDEP New York City Department of Environmental Protection NYSDOH New York State Department of Health ORP Oxidation Reduction Potential PAHs Polycyclic Aromatic Hydrocarbons PCBs Polychlorinated Biphenyls PCR Property Control Representative PID Photoionization Detector PO Project Officer PPE Personal Protective Equipment QAPP Quality Assurance Project Plan QA/QC Quality Assurance/Quality Control RCRA Resource Conservation and Recovery Act RI Remedial Investigation RI/FS Remedial Investigation/Feasibility Study ROD Record of Decision SMO Sample Management Office SMP Site Management Plan SOP Standard Operating Procedure SOW Statement of Work SVOCs Semivolatile Organic Compounds TAL Target Analyte List

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TCL Target Compound List TCLP Toxicity Characteristics Leaching Procedure TOC Total Organic Carbon TDS Total Dissolved Solids TSS Total Suspended Solids UFP Uniform Federal Policy USACE United States Army Corps of Engineers USGS United States Geological Survey VOC Volatile Organic Compound WAM Work Assignment Manager

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1.0. Introduction

This draft Work Plan amendment – referred to as Phase 3 Work Plan - was prepared for the United States Environmental Protection Agency (EPA) by Henningson, Durham & Richardson Architecture & Engineering, P.C. in association with HDR Engineering, Inc. (HDR) and CH2M HILL to provide a scope of work for Phase 3 of the Remedial Investigation/Feasibility Study (RI/FS) for the Gowanus Canal Site (Site), a Superfund site located in Brooklyn, Kings County, New York. This draft Phase 3 Work Plan was prepared based upon the April 12, 2010 Statement of Work (SOW). The RI/FS is being performed under Work Assignment Number 013-RICO-02ZP, under the EPA Region 2 RAC 2 Contract Number EP-W-09-009. In developing the Work Plan, elements of the work that are supportive of the local community were considered. This Work Plan also incorporates elements of the EPA Region 2 Green Remediation policies found at: http://www.epa.gov/region02/superfund/green_remediation/ The activities to be completed under the tasks described in the SOW are outlined and described in this Work Plan. Planning activities to be completed during Phase 3 of the RI/FS include project administration; review of any new background materials that become available; revision of the Quality Assurance Project Plan (QAPP) developed for the Phase 2 activities to include the Phase 3 activities; revision of the Health and Safety Plan (HASP); and revision of the Site Management Plan (SMP); and subcontract procurement and management. Phase 3 field activities include sampling of surface water, surface sediments, and tissue; sampling of outdoor air; installation and sampling of groundwater monitoring wells; water level monitoring; sampling of CSOs; and tracking and review for completeness of the received data. An anticipated deliverables schedule is provided at the end of this Work Plan (Volume 1). As noted in the schedule, a revised HASP and a revised Uniform Federal Policy (UFP) QAPP will be submitted. The HASP will contain the Community Air Monitoring Plan (CAMP) and the QAPP will contain Standard Operating Procedures (SOPs) for sampling and a SMP. The CAMP is required by New York State Department of Health (NYSDOH) and the SMP is needed to provide a framework on how the field operations will be managed. A Work Plan Cost Estimate is submitted to EPA as Volume 2. This Work Plan is to initiate the Phase 3 field activities. Subsequent Work Plan amendments are expected to cover the associated data management and reporting for both the Phase 2 and Phase 3 activities. The Phase 3 objectives that are addressed in this Work Plan are as follows: • Continue to review and assess investigatory work and information that become

available for the Gowanus Canal and develop data needs for completing the RI/FS for the Site;

• Develop the needed planning documents to begin the field activities described in this Work Plan;

• Perform the described sampling;

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• Summarize the field data, prepare summary tables of the collected samples, and sample location maps;

• Coordinate the sample analyses and track received data; and • Consider elements of Green Remediation and sustainable practices throughout the

RI/FS process, and document efforts and observations to EPA. No work beyond that described in EPA’s SOW or this Work Plan will be initiated prior to obtaining EPA approval. 1.1. Purpose The purpose of this Work Plan is to set forth the requirements to successfully implement Phase 3 of the RI/FS which will serve as the informational foundation for developing, evaluating, and selecting a remedy to eliminate, reduce, or manage risks to human health and the environment. The goal of the Phase 3 activities is to expeditiously develop the minimum data and information necessary to proceed with the assessment of the contamination conditions in the canal and the development and evaluation of appropriate remedial alternatives. The ultimate goal of Phase 3 is to develop the necessary information to support the selection of an approach for site remediation in a well-supported Record of Decision (ROD). It is expected that this Work Plan will undergo subsequent amendments / revisions in response to EPA requests to include additional scopes of services needed to complete the characterization of the canal and the associated data evaluation and reporting (for example, data management and evaluation, human health and ecological risk assessments, report preparation, and other as identified by EPA). 1.2. Site Description The Gowanus Canal Site is a 100-foot wide, 1.8 mile long canal located in the New York City borough of Brooklyn, Kings County, New York. Connected to the Gowanus Bay in Upper New York Bay, the canal borders several residential neighborhoods including Park Slope, Cobble Hill, Carroll Gardens and Red Hook. The adjacent waterfront is primarily commercial and industrial, currently consisting of concrete plants, warehouses, and parking lots. There are five east-west bridge crossings over the canal, located at Union Street, Carroll Street, Third Street, Ninth Street, and Hamilton Avenue. The Gowanus Expressway and an aboveground section of the subway system, pass overhead. 1.3. Background The Gowanus Canal, completed in the 1860s, was built to allow water access for industrial needs by bulkheading and dredging a tidal creek and wetland that was previously fished for oysters. The canal quickly became one of the nation’s busiest industrial waterways and was home to heavy industry such as gas works, coal yards, cement makers, soap makers, tanneries, paint and ink factories, machine shops, chemical plants, and oil refineries. It was also used as a repository of untreated industrial wastes, raw sewage, and surface water runoff for many decades causing it to become one of New York’s most polluted waterways.

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Although much of the industrial activity along the canal has stopped, high contaminant levels remain in the sediments. Despite ongoing pollution problems, some city dwellers use the Gowanus Canal for recreational purposes, such as canoeing and diving, while others catch and eat fish. The City built a “Flushing Tunnel” in 1911 to replace stagnant canal water with fresh, oxygen-rich water to improve water quality. The tunnel was in operation until the 1960s when a mechanical failure caused it to shut down and the canal became stagnant and thus polluted once again. The City’s Department of Environmental Protection (NYCDEP) has subsequently restored water flow through the tunnel, which now operates 24 hours a day, seven days a week, bringing fresh water into the canal. The canal is part of the New York-New Jersey Estuary, which the EPA has designated an Estuary of National Significance. 2.0. Task Descriptions and Assumptions 2.1. Task 1: Project Planning and Support

2.1.1. Subtask 1.1 Project Administration/Management Under this subtask, the HDR project team will provide project administration and management support to complete the work assignment. The HDR project team for the Phase 3 activities will continue as established for the Phase 1 and Phase 2 activities. The Project Manager supported by the Assistant Project Manager will be the primary interface between the EPA Work Assignment Manager (WAM) and technical staff. The Project Manager supported by the Assistant Project Manager will manage day to day activities, interface with the EPA WAM on a weekly basis, provide bi-weekly invoice inputs to HDR CONNECTS (HDR’s automated financial management system), oversee and coordinate the project, and manage project staff, budget, and task schedules. Project Administration/Management time has been estimated to direct and manage efforts including staffing plans, budget tracking, project scheduling, and establishing internal quality management procedures. The Level-of-Effort (LOE) estimate assumes that the Phase 3 activities covered in this Work Plan will be delivered over four (4) months. The activities included in Project Administration/Management include financial and recordkeeping/filing, monthly coordination and preparation of monthly reports, weekly status calls with the WAM and associated follow-up.

2.1.2. Subtask 1.4 Develop Draft Work Plan and Associated Cost Estimate This Phase 3 draft Work Plan was prepared by the HDR project team based on information in the SOW and project schedule, discussions with EPA during the technical meeting held on March 10, 2010; the technical site visit held on March 18, 2010; the Phase 3 data needs developed as part of the Phase 1 and 2 work; and technical discussions with the EPA WAM over the course of the Phase 1 and 2 work. This draft Work Plan provides a detailed

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description of each project task including cost assumptions, deliverables/documentation, and staffing.

2.1.3. Subtask 1.5 Negotiate and Revise Draft Work Plan/Budget Following the draft Phase 3 Work Plan preparation, HDR will negotiate the Work Plan with EPA by teleconference. A final Work Plan that incorporates the negotiated agreements will be prepared. The document will include a summary of the negotiations with both electronic and hard copies of the document submitted to EPA. The document will be submitted within five (5) days after receipt of final EPA comments. LOE associated with this task include preparation for the draft Work Plan negotiations, participation in the conference call negotiations with the WAM, contracting officer (CO) and project officer (PO), preparation of the meeting minutes, and revising the Work Plan and budget.

2.1.4. Subtask 1.6 Evaluate Existing Data and Documents Existing site background information continues to become newly available to the HDR project team and requires review and understanding to incorporate into the overall understanding / conceptual model for the Site. In addition, as investigation activities are performed by other entities, their planning documents and other background information become available and require incorporation into the overall project understanding for consistency. Under this subtask, this information will continue to be reviewed by the HDR project team as it becomes available. In reviewing the information, the HDR project team will continue to assess and identify data gaps to complete the site characterization activities; identify additional data requirements to perform the human health and ecological risk assessments; identify and map sources (current and historic) of contaminants contributing to the Canal water and sediment contamination; and provide reviews of submitted information for consistency with the investigation approaches employed by the EPA. The LOE associated with this task is for the continued review of information that is identified and becomes available following the preparation of the Work Plan. It is assumed that the documents will be provided to the project team and that no travel will be needed to obtain copies. Based on the completed review, the data gaps / needs table prepared thus far for the RI/FS will be continually updated as appropriate. We have also assumed that all reports and data will be sent to the HDR project team and that no travel will be needed to gather this information. Additional LOE may be needed under this task as new information becomes available for review. This task does not include LOE for entry and management of existing data in a database

2.1.5. Subtask 1.7 Quality Assurance Project Plan The QAPP developed for the Phase 2 activities will be revised to include the Phase 3 activities. It should be noted that the Phase 2 QAPP describes the policy, organization, functional activities, and QA/QC protocols necessary to achieve the data quality objectives established for these activities. All sections in the QAPP related to field sampling and analytical protocols will require revisions to include the Phase 3 sampling and analytical

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program which is different (involving many more media and analyses) than the Phase 2 sampling program. The draft QAPP will be provided to EPA for review and one set of consolidated comments will be addressed. The QAPPs will be e-mailed to the EPA and three hard copies of the draft and final will be sent in the mail. The following sampling Standard Operating Procedures developed for the Phase 2 QAPP will be revised to include the requirements for the Phase 3 activities: • Field Log Book • Sample Nomenclature • Chain Of Custody Procedures • Field Collection/Data Forms • Sample Labeling, Packaging and Shipping • Field instruments • Equipment decontamination • Collection of samples for VOC analysis • Data management The following new SOPs will be developed: • Air Sampling (3 different techniques) • Fish Sampling Using Nets, Seines, or Angling • Fish Sampling Using Minnow Traps • Shellfish Sampling Using Crab Pots • Fish Tissue Processing • Surface Water Sampling • Surface Sediment Sampling • Well installation • Well development • Soil sampling • Groundwater sampling • CSO Sampling • Weather monitoring and recording • IDW sampling • Filtering samples (groundwater and surface water) Consistent with the Phase 2 activities, sediment and soil samples for VOC analyses will be collected using TerraCores. The Site Management Plan will also be updated as appropriate to describe any specifics related to the Phase 3 activities.

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2.1.6. Subtask 1.8 Health and Safety Plan The site specific HASP developed during the Phase 2 activities will be updated as appropriate at the start of the Phase 3 activities to include information specific to the Phase 3 field activities. The HASP also includes a CAMP. This plan is required by the NYSDOH. The CAMP was developed for the Phase 2 activities using as a guidance the NYSDOH Generic Community Air Monitoring Plan Rev 1 dated June, 2000. This CAMP will be reviewed and updated as appropriate to include the Phase 3 activities, which include significant work in areas readily accessible to the community (roadways).

2.1.7. Subtask 1.9 Non-RAS Analyses Analyses will be performed through EPA’s Division of Environmental Science and Assessment (DESA) laboratory, the Contract Laboratory Program (CLP) or a subcontracted laboratory. No scope and LOE are included under this subtask.

2.1.8. Subtask 1.11 Subcontract Procurement This subtask includes the procurement of subcontract services required for the performance of the Phase 3 activities and continuation of the rental agreement for the field office space established at the start of the Phase 2 activities. This Work Plan assumes that the ecological and human health sampling will be performed in parallel with monitoring well installation. Therefore, services / subcontracts which are common to both tasks are included under the ecological and human health sampling task (for example, the subcontract for the rental of field equipment). Other subcontract services which are unique to a task are included under the task where these services are needed (for example, the drilling subcontract is included under the monitoring well installation task). The subcontracts that will be procured to deliver the Phase 3 activities described in this Work Plan are: • Drilling services • Surveying services • Analytical services • Bioassay testing services • Disposal services for drums with decon water and PPE • Rental of monitoring equipment • Historic Survey In addition, the following rental agreements will be established for 3 months: • Space for the staging of IDW and drilling rigs and supplies • Fencing around the IDW storage area

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The rental of the space for field operations established at the start of the Phase 2 activities, will be continued for 3 months (through the end of August) to cover the Phase 3 activities. Two internet wireless cards will be used to provide connectivity of the field office. Materials (expendable and consumable supplies) will be purchased and include miscellaneous field supplies, health and safety supplies, and sample bottles. This subtask includes developing the scopes of work for all procurements and purchases. Subcontracts are planned based on unit rates to allow for variations in quantities based on the encountered field conditions and duration of the field activities. This will allow for field decisions to be made to increase quantities (for example, collect additional samples if needed) in order to fill data gaps based on the observed field conditions. These decisions will be made only after the HDR project team consults with and receives approval from the EPA WAM, PO, and CO, as appropriate. The HDR project team has worked with a number of firms including small businesses and woman-owned businesses that have performed similar services under United States Army Corps of Engineers (USACE)-NY District contracts. The HDR project team will participate in a pre-bid meeting and will review/evaluate whether the subcontractor bids address the technical needs of the project. Selection is planned based on best value to the government.

2.1.9. Subtask 1.12 Perform Subcontract Management The HDR team will perform subcontract management, including: • Implementing procedures for subcontractor management; • Monitoring of subcontractor progress and performance; • Maintaining subcontracting systems and records; • Issuing subcontract modifications (if warranted); • Reviewing and approving subcontractor invoices; • Maintaining subcontract files; • Coordinating subcontractor activities with EPA; and • Closing each subcontract. Quantities will be tracked daily during the field activities and updates provided to the Project Manager, including early notifications if field conditions may necessitate an increase in the quantities assumed in this Work Plan. Any changes to a subcontractor's quantities will also be reported to the Project Manager. The Project Manager will be responsible for making the determination as to the need to modify the subcontractor to reflect the changes in quantities. These changes will be brought to the attention of the EPA WAM. After an evaluation of the proposed change and receipt of the EPA Contracting Officer’s consent (if required), a subcontract modification may be issued to effect the change. A change of any subcontractor’s scope of work will not be made without a prior determination of appropriateness and approval by EPA’s Contracting Officer.

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All subcontractor invoices will be submitted to HDR for review and approval. After approval by the Project Manager or designee, the invoice will be submitted to the HDR Accounting Department for inclusion in the project invoice. 2.2. Task 2 Community Relations

2.2.1. Subtask 2.3 Public Information Meeting Support This subtask continues from the Phase 1 Work Plan. The HDR project team will make arrangements for one public information meeting. It is assumed that as in the past, the public meeting will be held in a public building at no cost to the government. The HDR project team will participate in a conference call with EPA prior to the meeting and prepare a draft presentation for the meeting. Two project team members will attend the meeting, provide and operate a standard overhead projector, and prepare draft and final meeting summaries (e.g., list of questions asked).

Since the meetings may include informal discussions, meeting participants will be requested to maintain individual lists of questions and to provide these questions to the project team attendees at the end of each meeting. Stenographer support is not included.

2.2.2. Subtask 2.4 Fact Sheet Preparation One draft fact sheet for the Site will be prepared at the direction of EPA’s WAM. The HDR project team will research, write, edit, design, layout and reproduce the fact sheet including attaching mailing labels prior to delivery to EPA. The final fact sheet will be prepared incorporating all EPA comments. After EPA approval, the project team will attach mailing labels to the fact sheets, fold the fact sheets, and add postage before delivering them to EPA. EPA is responsible for mailing of the fact sheets. The costs assume one four-page black and white fact sheet, with 2-3 illustrations to be distributed prior to each public meeting, for a total of 2 fact sheet distributions. The fact sheets with mailing labels will be provided to the EPA seven days prior to a public meeting/event. Per contract clause H.3, it is assumed that no more than 100 pages of color copying will be required for the public meeting fact sheets.

2.2.3. Subtask 2.6 Public Notices Three newspaper announcements/public notices are assumed to be required. The costs assume the HDR project team will coordinate publication of the announcement/public notice. Costs are based on past notices published. In addition, three accompanying mailings notifying the public of the upcoming events are assumed to be required. The mailing list for this is assumed to remain the same as in other mailings.

2.3. Task 3 Field Investigation

The Phase 3 field investigation includes the following: • Ecological and human health risk assessment sampling

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• Upland investigation • Cultural resources tasks

2.3.1. Subtask 3.3 Ecological and Human Health Risk Assessment Sampling

This subtask includes the following: • Identify field support facilities, services, supplies, equipment, and subcontracts • Prepare for the field activities and mobilization • Perform sampling and process samples • Complete field documentation and summaries of the performed field activities Identify field support facilities, services, supplies, equipment, and subcontracts This subtask includes identifying and coordinating with suppliers the field support facilities, services, supplies, equipment, and subcontracts needed for the performance of this subtask. This subtask includes the costs for the rental of the commercial space and IDW storage space and fence for a period of 3 months. This subtask also includes subcontract costs for the following: • Field monitoring equipment rental for the entire field event This subtask also includes the purchase of the following expendable and consumable supplies for the entire field event: • Sample bottles • Health and safety supplies • Miscellaneous other field expendable and consumable supplies • Internet cards The costs for cooler shipment for the entire field event are included in this task. The total number of coolers requiring shipment is estimated at 443. Costs for return shipping are also included. A Property Control Representative (PCR) will be designated on the project. The PCR will be responsible for maintaining the documentation on equipment rental and consumable purchases in conformance with the operating procedures for government property administration established by Far Part 45. Prepare for field activities and mobilization Mobilization will include the following: • Prepare for field work

− Prepare final map of sampling locations for each targeted media

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− Prepare table of planned sample location coordinates − Develop project instructions − Kick-off planning meeting − Set-up forms, paperwork for field activities and subcontract quantity tracking − Field team review of QAPP, H&S plan, Community Air Monitoring Plan, SMP, and

instructions • Mobilization

− Mobilization of equipment and supplies − Setting up of the field office space and sample processing area − Identifying, assembling, loading, transporting, unloading, and arranging the

equipment at the site. Perform planned sampling and process the samples

Attachment 1 contains figures showing the following: • Locations where surface water and sediment samples are planned within the canal • Reference locations in Gowanus Bay for surface water and sediment sampling • Locations where air samples will be collected along the length of the canal and at

reference locations removed from the canal • The reaches in which the canal will be divided for the purpose of fish and shellfish tissue

sampling (although if sufficient samples are not obtained, fish and shellfish tissue collection may become more opportunistic)

Also included in Attachment 1 are the following tables: • Summary of Phase 3 sampling program • Detailed list of Phase 3 samples The final locations may be adjusted / refined from those shown in Attachment 1 before the start of the field activities or during the field effort based on further observations of conditions in the canal or reference areas. This phase of sampling activities will be highly dynamic and driven by weather conditions. Wet weather sampling can occur only when at least 1/10 of an inch of rainfall occurs with low tide conditions and needs to begin shortly (3-6 hours) after the start of the rain event. Dry weather sampling needs to occur a minimum of 2-3 days after a rain event. However, because sampling will be driven by weather, based on experience, it is likely that there may be multiple false starts (the team mobilizes to the field and the desired weather conditions do not occur). To account for these situations, each wet weather event (one surface water, 3 CSO events) and each air event includes one false start (mobilization and an 8-hour day for the field team waiting for the event to occur). Weather conditions will be monitored daily to ensure that samples are collected under the appropriate weather conditions. Records of actual weather conditions and forecasts will be prepared daily and used to make decisions about the type of activities that need to take place. For example, sampling may start with a dry weather event. If rainfall occurs, then the

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field crews will move to a wet weather event. In the 2-3 days of time following a wet weather event, when dry weather sampling cannot occur, the crews will be occupied with the setting of the air samplers. All possible efforts will be made to keep the crews engaged in productive work with events which correspond to the weather conditions at hand (dry, wet weather) and also minimize the occurrences of false starts due to weather forecasts. LOE for false starts are included in this Work Plan in recognition that there may be situations where this is not achievable. The LOE for the activities included in this task are budgeted assuming sequential delivery of the activities. The activities to be accomplished under this task are complex and dynamic with multiple activities likely to take place simultaneously due to the needed schedule. To support smooth performance of the activities, coordinate between the teams, support the processing of samples and associated paperwork, and serve as liaison between the technical leads in the office and the field, a field operations manager (FOM) is assumed to be present for the duration of the field activities (15 weeks). The LOE for the FOM are included under subtask 5.1. The Phase 3 sampling program planned in support of the human health and ecological risk assessment is described below. Surface sediment

• Samples will be collected from 27 locations within the Gowanus Canal and from 10 reference locations in New York Harbor, outside the mouth of the canal.

• The 10 reference locations were initially selected to provide an approximate grid with increased spacing with increasing distance from the mouth of the canal. The locations were then adjusted to be situated in areas where organisms are expected to occur (i.e., locations 330, 331, 332, 333, 334 were adjusted to be located on a shoal rather than in the deep channel). The coordinates of the selected reference locations have been established and will be used by the field team to position at the target locations using a GPS. Final adjustments may be needed in the field based on observed conditions. The field teams will record the reasons for the adjustments and the coordinates of the adjusted locations in the field log book.

• Samples will be collected using an appropriate grab sampling device (e.g., ponar, VanVeen, modified VanVeen, or clam shell type grab sampler).

• Samples will be collected when there are no discharges from CSOs into the canal.

• Sediment samples will be described with respect to gross grain size, color, odor and any other notable observations during field collection.

• Samples will be collected from the top approximately 0.5 feet of sediment and will be analyzed for the following parameters: Target Compound List (TCL) Organics, Target Analyte List (TAL) Metals (including Mercury), Cyanide, Total Organic Carbon (TOC), Acid Volatile Sulfide/Simultaneously Extractable Metals (AVS/SEM), and grain size. Sediment samples for the AVS/SEM analysis are proposed for collection from the same depth (0 to 6 inches) as samples for the sediment bioassay and chemical analytical testing. Collecting samples from the same depth for all analyses will facilitate the

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interpretation of the outcomes provided by each interrelated data set and support the weight-of-evidence data evaluation and interpretation.

• A total of 11 field samples (8 from locations in the canal and 3 from reference locations) will also be collected for polychlorinated biphenyls (PCB) congeners analysis. The locations in the canal that will be sampled for PCB congeners are: 301, 305, 307A, 308A, 308B, 312, 320, and 325 (note that locations 308A and B are situated on the two ends of the canoe launching area). These locations were selected to 1) provide data for areas with the greatest potential for human exposure (i.e., the canoe launch); 2) provide data in areas where high PCB concentrations were previously measured in sediment, and 3) to provide spatial coverage throughout the canal. The reference locations that will be sampled for PCB congeners are 326, 330, and 333.

• Additional sample volume will be collected at all sampling locations and archived for future analysis, if needed.

• In all cases, the analyses that will provide the lowest detection limits will be requested and adjustments to higher detection limits, if necessary, made by the laboratory based on the level of contamination noted in each sample.

• A total of 16 sediment samples (from 11 locations within the Gowanus Canal and 5 reference locations) will be collected for sediment toxicity tests.

− The locations in the canal where the toxicity test samples will be collected are: 303, 307A, 309, 310, 313, 314, 315, 318, 319, 321, and 324. The reference locations where the toxicity test samples will be collected are: 326, 328, 329, 330, and 333.

− The toxicity testing will be performed using two species: amphipod (L. plumulosus) and a polycheate (Nereis virens).

− The measurement endpoints for the L. plumulosus test will be survival, growth, and reproduction, while the endpoints for the Nereis virens test will be survival and growth.

Surface water

• Samples will be collected from the same 27 locations within the Gowanus Canal and 10 reference locations where surface sediment samples will be collected.

• Samples will be collected during one wet weather and one dry weather event for a total of 74 field samples.

• Samples will be analyzed for TCL Organics, TAL Metals (total and dissolved including Mercury), Cyanide, and Total Suspended Solids (TSS).

• Field measurements of Salinity, pH, Specific conductance, Dissolved Oxygen, Oxidation Reduction Potential (ORP), Temperature, and Turbidity will be taken at each location.

• Surface water samples will be collected from approximately 6 inches below the water surface using a discrete depth sampling device such as a Kemmerer or VanDorn bottle or equivalent to collect volume for preserved samples. Bottles for unpreserved analyses will be filled directly by submerging the sampling container and removing the cap at the desired depth.

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• Water quality data for non-contaminant stressors, including measurements of dissolved oxygen, temperature, and salinity, at up to 7 locations throughout the Gowanus Canal and Bay will be evaluated and considered as part of the ecological risk assessment. It is assumed that existing data will be obtained from the NYCDEP Harbor Survey Monitoring Program.

Fish and shellfish tissue

• Fish and shellfish (crab) tissue samples will be collected within the Gowanus Canal and from reference area(s).

• The collection of fish and crab samples will be an iterative process that will need to be modified depending upon what can be collected at each of the selected sample locations. The field sampling team will therefore need to maintain regular communications with the ecological risk assessment technical lead throughout the course of the field tissue collection. Check-in calls between the field team and the ecological risk assessment technical lead will be conducted at least twice a day during the field sample event to provide updates about the sample effort (e.g., sample methods and locations) and resulting catch. The ecological risk assessment lead will in turn communicate with the EPA on the species captured and whether any modifications are needed to the developed approach.

• The tissue sampling is anticipated to begin in mid June 2010 and continue for up to 15 days. Both target species and alternate species for the sampling have been identified. It should be noted that reasonable attempts will be made to collect the targeted organisms, however, if the organisms are not present in a given reach of the Canal, the attempts made will be documented and samples may not be able to be acquired. If sufficient numbers of organisms of the alternate species are captured, those organisms may be submitted for analyses.

• The target species for this event and alternate species, if target species are not available, include the following:

Small Prey Fish

Target Species – Mummichog Alternate Species - Killifish

Crab Target Species – Blue crab Alternate Species – Determine onsite (collected crab needs to be large enough to allow tissue to be picked)

Larger Fish Species Target Species – Striped bass, white perch Alternate Species - American eel, cunner (i.e. bergall, choggie, ocean perch), tautog (i.e. blackfish), winter flounder

During at least the first two days of the sampling event, all potential target species and alternate species that are captured will be retained on ice for possible use. With the exception of crab, all species that are not target species and not alternate species,

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captured during this initial period will be quantified and released. All crabs that are large enough for tissue to be picked will be retained for possible use.

• During at least the first two days of the sampling event, all sizes of target and alternative species that are captured will be retained on ice for possible use. Depending on the initial catch, preference for Larger Fish Species (see above) and for Crab (blue crab) may be given to individuals that fall within existing legal size limits for recreational fishing, if individuals within these sizes are available. If individuals within the existing legal size are not available, a determination will be made in consultation with the EPA on the sizes to retain. Legal size limits for recreational fishing are identified below.

Striped Bass: 28” - 40”

Tautog: 14”

American Eel: 6”

Winter Flounder: 12”

Blue Crab: 4.5” (hard shell)

Small prey fish (mummichog/killifish) will be evaluated only in the ecological risk assessment and all sizes of these fish can be retained for use. Small fish not needed for the human health risk assessment (i.e., small striped bass, white perch, or alternate species) may be retained for whole body tissue analysis for possible use in the ecological risk assessment.

• Tissue sampling within the Canal will consist of the following:

− Mummichog − 6 sampling locations selected to provide coverage of the Canal (e.g., using the

bridges to divide the Canal into 6 reaches - 401 through 406 – please refer to figure in Attachment 1)

− 1 composite tissue sample per location will be targeted − Samples will be whole body − Minnow traps will be used for mummichog collection − The traps will be initially set at locations where sediment samples for toxicity

testing were collected within each reach. The traps may need to be moved if sufficient species are not captured to make the needed sample volume for analysis.

− Blue Crab − 6 sampling locations as described above − 2 composite tissue samples per location will be targeted − 1 edible tissue composite − 1 hepatopancreas tissue composite − Crab pots will be used for blue crab collection − The pots will be initially set at locations where sediment samples for toxicity

testing were collected within each reach. The traps may need to be moved if sufficient species are not captured to make the needed sample volume for analysis.

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− Striped Bass and White Perch − Fish will be caught along the length of the Canal where ever found − For each species, target is 6 composite fillet tissue samples and 6 composite

samples of the rest of the carcass (total of 12 samples for each species) − Fillet data will be used in human health risk assessment (HHRA), and fillet

plus carcass data will be combined to represent whole fish concentrations − The larger sport fish will be collected using fyke or hoop nets, seines or gill

nets, or angling. The collection of sport fish may require a combination of all three sampling methods including otter trawls in order to collect sufficient organisms.

− Reference samples for each tissue type, will be collected from 5 reference sites situated at the mouth of the Gowanus Canal and into the Gowanus Bay by the same methods stated above. The general area where the reference tissue samples will be collected is referred to reach 407. All of the selected reference surface water and sediment samples are situated within reach 407.

− The reference sites for the mummichog and blue crab within reach 407 will be initially set at locations 326, 330, and 333 where reference sediment samples for toxicity testing are planned. From there, the traps / pots may need to be moved to other locations within reach 407 if sufficient species are not captured at the initial locations to make the needed sample volume for analysis.

− The reference samples for the larger fish will be obtained in the general area of reach 407 where the surface water and sediment reference samples are situated.

• The analytical scheme for the tissue samples is identified below. The targeted list of analytes was selected based on the constituents detected in shallow sediments (0-3’) during the previous investigations that are also known to be bioaccumulative. If insufficient tissue mass for all chemical analyses is recovered after attempting various recovery schemes, then analyses will be performed in the order shown below. PAHs, PCBs and metals are expected to be the primary constituents of concern based on review of existing data. PAHs will be analyzed in crab tissue only because PAHs do not bioaccumulate in fish. If insufficient tissue mass is available for both PCBs and metals analysis, then a final decision about analytical parameters will be made in consultation with EPA.

− Blue crab: 1. PAHs (TCL-Semivolatile Organic Compounds [SVOCs]) 2. PCB congeners and TAL metals (including mercury) 3. Pesticides (TCL-Pest)

− Mummichog, striped bass, and white perch: 1. PCB congeners and TAL metals (including mercury) 2. Pesticides (TCL-Pest)

− All samples will be analyzed for percent moisture and lipid content The target analyte list for tissue samples is provided in Attachment 1.

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Ambient air

• Air samples will be collected from 10 locations along the canal and from 3 locations selected taking into consideration the predominant wind direction (Attachment 1).

• Two rounds are planned – one before and one after the start of the canal oxygenation system being installed by New York City. Air sampling will occur 2-3 days following a rain event.

• At each location along the canal, two samples are planned – one at canoe level and one at street level. The samplers at the canoe level and some of the samples at the street level will need to be installed from the water.

• A total of 46 field air samples will be collected.

• Samples will be 24-hour composite samples. All samples will be analyzed for Volatile Organic Compounds (VOCs) and PAHs. One sample collected at street level (location 506 at the street level) will be analyzed for PCBs. Samples for VOC analysis will be collected using Summa canisters. Samples for analyses for PAHs will be collected using low-volume samplers. The sample for PCB analysis will be collected using high-volume sampler and was selected at a location where it can be secured and an electrical drop line provided for the operation of the sampler.

• For the air sampling event, several different samplers will be used to collect 24 hour composite samples. The majority of the sampling locations are situated at the end of dead-end streets and on the bulkheads of the canal. Therefore, most of the samplers will need to be installed using boats. Air sampling needs to occur after 2 to 3 days of dry weather. Because of the need to coordinate the sampling event with weather conditions and the amount of time that it would take to install the samplers, mountings for the samplers along the canal (except for the high volume PCB sampler) will be installed in one event by two boat crews and left in place awaiting the right weather conditions. When these occur, the samplers on the bulkheads will be deployed and attached to the already-set mountings and turned on; these will be done from the canal side and will require the use of boats. A ground crew will at the same time, deploy and turn on the three background samplers and the high volume PCB sampler.

Following 24 hours of sampling, the samplers along the canal will be removed by the two boat crews and the background and PCB sampler will be removed by the ground crew. Samplers will be attached / secured with chains and signs placed on them to alert trespassers that these are sampling devices. Security of the samplers is important to assure the integrity of the samples. After the samplers are started, we have assumed that they will be checked at the end of the work day when they are installed / started and then the next morning. No security services are included to patrol the samplers during the night. The reason is because unless a security service is assigned to each sampler, patrolling them is unlikely to provide added security because there will be long period of time between security visits when the samplers will be unattended.

The target analyte list for the air samples is provided in Attachment 1.

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Combined Sewer Overflows (CSOs) to the Canal - water and sediment

• Water and sediment samples will be collected from the following 10 CSOs discharging to the canal:

RH-031Bond-Lorraine Sewer relief at Lorraine and Smith Streets RH-0034 Gowanus Pump Station RH-033 Regulator R-25 at Nevins and Douglass Streets RH-035 Bond-Lorraine Sewer relief at Bond and 4th Streets RH-037 Regulator R-23 at Nevins and Sackett Streets RH-036 Regulator R-22 at Nevins and President Streets RH-038 Regulator R-24 at Nevins and Degraw Streets OH-005 3rd Avenue sewer relief at 3rd Ave. and Carroll St. OH-006 3rd Avenue sewer relief at 3rd Ave. and 19th St. OH-007 2nd Avenue Pump Station at 3rd Ave. and 7th St.

A map of the CSO sampling locations will be prepared and superimposed on a map showing the CSO discharge points into the Canal after the final sampling points are selected.

• Water samples will be collected during one dry and three wet weather events for a total of 40 field samples. Wet weather sampling will occur only when at least 1/10 of an inch of rainfall occurs with low tide conditions and will begin shortly (3-6 hours) after the start of the rain event. Dry weather sampling will occur a minimum of 2-3 days after a rain event. At one location (the Gowanus Pump Station), the sample will be collected using an auto sampling device. At the remaining nine locations, grab samples will be collected from manholes where regulators/relieve valves are located upstream of the CSO discharge into the canal. Samples from these manholes are expected not to include backflow (tidal intrusion) from the canal and represent the flow discharging through the CSOs into the canal. The dry weather event will be conducted first and used to assess sampling protocols. The CSO has sanitary and street runoff components. Dry weather sampling will indicate whether there are sanitary sources of contaminants in the CSO discharges that may be contributing to conditions in the canal. The dry weather sampling event will include the collection of both water and sediment samples. Wet weather samples will be used to assess the combined flow discharging through the CSOs into the canal. The wet weather sampling events will include the collection of water samples.

• A field reconnaissance site visit will be performed at the start of the field activities to verify sampling locations and conditions and make arrangements for dry and wet weather sampling. This will require entering the Gowanus Pump Station to identify a suitable location for the installation of an automatic sampler with a flow or hydrostatic sensor that will trigger sampling when a wet weather event begins. The field team will also inspect monitoring locations in the streets around the Canal to verify manhole or regulator access locations, and suitability for sampling.

• The following analyses are planned:

− Water samples - TCL Organics, TAL Metals (total and dissolved including Mercury), Cyanide, and TSS. Field measurements of Salinity, pH, Specific conductance,

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Dissolved Oxygen, Oxidation Reduction Potential (ORP), Temperature, and Turbidity will be taken at each location.

− Sediment samples - TCL Organics, TAL Metals (including Mercury), Cyanide, TOC and grain size. Sediment samples will be described with respect to gross grain size, color, odor and any other notable observations during field collection. Sediment samples will be composites of the sediments that are brought to the surface (except for the sample for VOC analysis which will be collected from the area of highest photoionization detector (PID) response or evidence of contamination based on visual observations of the sediments brought to the surface).

During the field activities, the following will be performed by the field team: • Daily calls between EPA, PM / Assistant PM, RI lead, and FOM to discuss progress,

resolve technical issues, and plan remaining activities. • Laboratory sample paperwork including the use of FORMS II Lite • Daily quantities tracking and reconciliation • Daily review of logs and other information for technical decisions and to verify

completeness and accuracy • Weekly downloading of GPS information (note: GPS coordinates for sampling locations

also will be recorded in the field log book and on field forms at the time of sampling) • Weekly downloading of photographic documentation • Weekly creation of photographic log • Daily assembling of field documentation • Daily status reports to EPA on completed activities • Property control representative Samples will be collected using appropriately-sized boats. Sample location coordinates (locations as shown in the figures in Attachment 1) were established as part of the project planning and data needs definition phase. The sampling teams will position / target these locations using a GPS. Final adjustments may need to be made in the field based on observed conditions. The teams will record the reasons for these adjustments and the coordinates of the adjusted locations in the field log book. Field collection details will be recorded on the applicable sampling logs. Samples will be periodically transported to shore for processing at the field office. Disposable sample processing equipment will be used to minimize the potential for sample cross-contamination. The appropriate sample jars will be filled and delivered to the sample custodians. After each sample is processed, the excess sample material and used sampling equipment will be collected and placed in the designated waste storage container(s), and the work area will be cleaned in preparation for the next sample. Traffic control measures for work in roadways (CSO sampling activities) will consist of traffic cones and signs provided at the work locations throughout the duration of investigation activities. Road closures are not anticipated but lane restrictions may be

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necessary in some work locations. Appropriate warning signs, cones, barricades, and other protective devices will be utilized. It is assumed that police escort or other traffic control is not required as part of the traffic control measures. Field days are estimated at 12 hours. This task is budgeted based on linear progression of each sampling effort. The overall duration of the sampling efforts included in this task is 41 field days of consecutive field activities. Complete field documentation and summary of field activities Shortly after each field effort is completed, a field summary documenting the completed field activities will be prepared. The summary will contain: a sample location map showing as-sampled locations, data tables showing field-collected data, sample summary tables, description of completed field activities and the methods used, major field observations, and deviations from the planned activities. The field summaries are needed to support continuation of project decisions until the RI Report is initiated after all the field activities are completed. Summaries will be provided in draft form for each of the following field efforts:

− Surface sediment sampling − Surface water sampling – for each of 2 events − Fish and shellfish tissue sampling − Air sampling – for each of 2 events − CSOs sampling – for each of 4 events

2.3.2. Subtask 3.4 Upland Well Investigation

The overall upland investigation includes the installation of 39 monitoring well pairs (shallow and intermediate) and 3 intermediate single monitoring wells along approximately 3 miles of canal frontage (east and west side of canal). This results in a total of 81 monitoring wells being installed along the length of the canal. The newly installed monitoring wells will be used together with selected existing monitoring wells to evaluate groundwater to surface water interaction (GSI) and the potential for groundwater contributions to the Canal as well as general contamination conditions along the length of the canal.

Monitoring wells will be installed and sampled by different entities but follow the construction details and sampling procedures established for the investigation in order to meet the established objectives. This Work Plan, in accordance with the received SOW, covers the installation of 12 monitoring well pairs. If data gaps are identified, this work plan includes the installation of 3 additional wells. Subsurface soil sampling is planned in eight of the monitoring wells. This subtask includes the following: • Identify field support facilities, services, supplies, equipment, and subcontracts • Property access support • Prepare for the field activities and mobilization

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• Drill, install, and develop monitoring wells • Complete field documentation and summary of field activities Identify field support facilities, services, supplies, equipment, and subcontracts This subtask includes identifying and coordinating with subcontractors for the performance of this subtask. Note that field monitoring equipment rental, purchase of health and safety supplies, purchase of miscellaneous field expendables and consumables, and purchase of sample bottles are budgeted under Task 3.3. Subcontractor costs are included for the following services: • Drilling services • Surveying Property access support The proposed monitoring wells are located within both private property and public streets and sidewalk areas. This task includes activities related to supporting EPA in securing right-of-way access from either New York City or private property owners. The general activities that will be completed to support the EPA as part of this task will consist of the following: • Contact the City of New York Tax Assessor’s office to obtain Block/Lot maps for the

parcels of interest and identify the owners of the properties. • Obtain from New York City, complete, and file applications for access based on the site

and ownership evaluations. • Work with / support EPA in contacting property owners to secure property access

agreements. Prepare for the field activities, utility clearance, and mobilization Mobilization will include the following: • Prepare for field work

− Prepare final map of monitoring well locations − Prepare table of planned coordinates − Develop project instructions − Kick-off planning meeting − Set-up forms, paperwork for field activities and subcontract quantity tracking − Field team review of HASP, CAMP, SMP, and instructions

• Mobilization − Mobilization of equipment and supplies

Drill, install, and develop monitoring wells Attachment 1 contains a figure showing the planned monitoring well locations and tables describing the sampling program including the number of samples planned and associated

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analyses. Monitoring well locations may be adjusted / refined before the start of the field activities based on access conditions. Subsurface Utility Delineation Subsurface utilities will be delineated at each proposed drilling locations. Because of the number of potential utilities and labor intensive coordination required to delineate clear drilling locations in the urban environment, the subsurface utility delineation work will be completed the week prior to commencing drilling activities. Delineation will consist of a multi-phased approach including:

− Perform a site visit to mark proposed well locations prior to requesting a NYC DigNet markout

− Perform a second site visit to revise well locations based on results of NYC DigNet markout

− Perform field oversight of subsurface utility delineation and soft-dig (e.g. AirKnife) evaluations of proposed drilling locations. These methods include use of surface geophysical instrumentation to passively scan the subsurface for indications of utilities and use of an intrusive but non-destructive technology based on high pressure air and/or vacuum to remove soil in a pilot hole and physically check for utilities.

Traffic Control Traffic control measures consisting of traffic cones and signs will be provided at the work locations throughout the duration of investigation activities. Road closures are not anticipated but lane restrictions may be necessary in some work locations. Appropriate warning signs, cones, barricades, and other protective devices will be utilized. It is assumed that police escort or other traffic control is not required as part of the traffic control measures. Drilling and Well Installation To accommodate the fast paced project schedule, RotaSonic (Sonic) drilling will be performed using two complete drilling crews simultaneously. At least one of the two drill rigs will be a “Mini-Sonic” or track mounted rig that is suited for congested work areas.

Appropriate permits, licenses, and registrations required to complete the work will be obtained including but not limited to federal, state, and/or local/city government requirements including drilling registrations, and local road opening/drilling/traffic control permits.

Technical details of the drilling program include the following:

• Sonic drill tooling of 8-inch diameter override casing and 4-inch diameter core barrels will be used.

• All soil boring locations will be continuously soil cored using 4-inch diameter core barrels to the terminal depth of the boring for observation and logging of lithology. The

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lithology of the soil cores will be logged and each core will be screened utilizing a PID and visually observed for signs of contamination. Photographs of soil cores will be collected as needed. The maximum estimated depth of the borings is approximately 50 feet below grade.

• Soil sampling will be performed during installation of select monitoring wells. Continuous soil sampling will be performed over the full length of the soil boring for analyses for TCL Organics, TAL Metals (including Mercury), and Cyanide. Composite samples will be collected over discrete 5-foot intervals for all analyses except for the VOC constituents which will be a grab-sample biased to the 6-inch interval within the 5-foot composite that shows the highest PID readings or visual indication of contamination. If uniform conditions are observed in the 5-foot interval, then the VOC sample will be collected from the middle of the interval.

• All soil boring locations will be converted to monitoring wells. Borings will be completed as nested well pairs where two unique wells will be installed within one large diameter borehole.

• The “shallow” wells will be installed straddling the water table which is estimated from previous work as occurring between 6 to 10 feet below ground surface (bgs) near the canal and 15 to 18 ft bgs further inland. The shallow wells will be constructed with a 10-foot long screen.

• The “intermediate” depth wells (i.e. the deeper of the two nested wells) will be designed on a case-by-case basis depending on local ground surface elevation and depth of the canal bottom (i.e. the elevation of the top of the native sediments underlying the canal as opposed to the top of the soft “mucky” accumulated recent sediments). The intermediate wells will be designed so that the top of the 5-foot long screen is positioned approximately 5 feet below the top of the native sediment at the bottom of the canal. The top of the well screen for the intermediate depth wells is estimated to range from 25 to 40 ft bgs. The depth of the native sediments in the canal will be determined based on the results of the Phase 2 sediment coring investigation in the canal and the depth of the individual wells pre-determined before the start of the drilling activities.

The additional objectives of the shallow wells (to straddle the water table) and intermediate wells (evaluating groundwater below the base of the canal) limit the flexibility in well screen depth interval selection. Recent evaluation of ground surface elevations and elevations of the contact between native sediments and overlying soft sediments in the canal, however, indicate that at least a 10-foot separation is anticipated between the shallow and intermediate screen intervals. This notwithstanding, a vertical separation between the base of the shallow and base of the intermediate screens of at least 3 feet is desirable as a measureable vertical distance between the screen elevations and is required for calculation of a meaningful gradient. Note that the well clusters will be installed within the same large diameter borehole so variations in the lateral distances of the wells from the canal will not be an influencing factor for the vertical gradient calculations.

• Monitoring wells will be constructed of 2-inch diameter Schedule 40 PVC well casing with machine slotted screen with 0.01-inch diameter (10-slot) slotting. Well riser pipe will be flush threaded with O-ring seals. The well will be fitted with a bottom plug and

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locking water-tight compression expansion cap. Keyed-alike locks will be installed on each well.

• The “shallow” wells will be constructed with a 10-foot long screen and the “intermediate” wells will be constructed with a 5-foot long screen.

• The wells will be finished using 10-inch diameter flush-mount manhole completions with a 12-inch steel skirt/collar. The manhole will be set in a 2-foot x 2-foot x 1-foot deep concrete pad.

• Materials will be pre-cleaned and individually wrapped by the manufacturer. Materials in damaged packaging will be pressure washed and decontaminated prior to use.

• The two nested wells (shallow & intermediate) will be constructed within the same large diameter borehole using alternating sequences of well gravel, transition sand and bentonite to fill the annular space. In general, construction of the wells will consist of #1 well gravel (or equivalent appropriately sized to a 10-slot screen) to 2 feet above the “intermediate” screen, certified acetone free bentonite chips to 4 feet below the bottom of the “shallow” well screen, # 1 well gravel to 2 feet above the top of the “shallow” well screen, and hydrated bentonite chips to ground surface. Specific well construction will be determined on a case-by-case basis in the field by the field geologist based on observed occurrence of the water table and the target depth of the Intermediate well.

• Sand and bentonite materials for completion of the annular space will be gravity fed into the borehole at a sufficiently slow pace to prevent ‘bridging’ of the annular space with continuous sounding of the material depths using a weighted tape.

• Monitoring wells will be developed no sooner than 24 hours after construction.

• Development will be performed using a combination of a surge block and submersible pump. Pumping will commence at the bottom of the well. The submersible pump will be raised in increments to develop the entire well screen interval. Polyethylene tubing will be replaced between drilling locations and the equipment decontaminated.

• Development will continue until one of the following conditions are met and the sediment thickness remaining in the well is less than five percent of the screen length (e.g.; 6 inches of sediment in a 10-foot screen):

− Stabilization of water quality parameters. Stabilization is defined as less than 10 percent variance between the removal of two successive well volumes. Turbidity measurements are critical development criteria, with a target level of 15 NTUs or lower.

− Five well volumes have been purged from each well (including the saturated filter material in the annulus) plus the volume of water added during the drilling processes (if any) have been removed from the well, regardless of stabilization of the water quality parameters

• Before the onset of drilling, after each hole, and before leaving the site, any part of the drilling equipment that has been in contact with the soil (including work platforms of the rig) will be decontaminated using a phosphate-free detergent (Alconox/Liquinox) solution scrub and high-pressure hot water until visible contamination is removed.

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• The monitoring wells will be surveyed (location and elevation) and incorporated onto the overall site plan. In addition to the monitoring wells, one reference measurement point benchmark will be installed on each property on the bulkhead at the Canal. The reference point will be surveyed (location and elevation) and used as a staff gauge benchmark to collect water level measurements from the canal at the same time that groundwater elevations are measured in the monitoring wells.

During the field activities, the following will be performed by the field team: • Daily calls between EPA, PM/Assistant PM, RI lead, and FOM to discuss progress,



also will be recorded in the field log book and on field forms at the time of sampling) • Weekly downloading of photographic documentation • Weekly creation of photographic log • Daily assembling of field documentation • Daily status reports to EPA on completed activities • Property control representative Field days are estimated at 12 hours. This task is budgeted based on linear progression of each sampling effort. The estimated duration of utility clearance, monitoring well installation using two rigs, well development, and surveying services is 21 days. At all wells where soil sampling will not be performed, the rig will be manned by one staff. At all wells where soil sampling will be needed, the rig will be manned by two staff. It is assumed that there will be no delays associated with gaining access for the performance of the planned activities and no weather and traffic control delays. As noted previously, the time for the FOM is budgeted under Task 5.1 and cooler shipping costs and consumable / expendable supplies are budgeted under subtask 3.3. Complete field documentation and summary of field activities Shortly after each field effort is completed, a field summary documenting the completed field activities will be prepared. The summary will contain: a monitoring well map showing as-installed locations, data tables showing field-collected data, sample summary tables, description of completed field activities and the methods used, major field observations, and deviations from the planned activities. The field summaries are needed to support continuation of project decisions until the RI Report is initiated after all the field activities are completed. The summary will be provided in draft form.

2.3.3. Subtask 3.5 Groundwater Sampling This subtask includes the following:

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• Identify field support equipment and facilities • Prepare for the field activities and mobilization • Synoptic water elevation measurements for 6 events • Continuous water elevation data logging in select wells and canal • One round of groundwater samples from 66 wells • Complete field documentation and summary of field activities Identify field support equipment and facilities This subtask includes identifying and coordinating the performance of this subtask. There are no subcontractor costs associated specifically with the performance of this subtask. Prepare for the field activities and mobilization Mobilization will include the following: • Prepare for field work

− Develop project instructions − Kick-off planning meeting − Set-up forms, paperwork for field activities and subcontract quantity tracking − Field team review of H&S plan, Community Air Monitoring Plan, SMP, and

instructions • Mobilization

− Mobilization of equipment and supplies Synoptic water elevation measurements, continuous water elevation data logging in select wells and canal, and one round of groundwater samples with corresponding surface water samples This subtask includes performing the following:

• Six rounds of monthly synoptic water elevation surveys. Measurements will be collected in installed monitoring wells and from the staff gauge reference points in the canal. Each of the six synoptic surveys will be completed within a 3-hour period to minimize tidal influences. Monthly events will be scheduled such that measurements are collected during different stages of tidal cycles.

• Continuous water elevation data logging will be performed in 22 wells (shallow and intermediate) spatially distributed across the study area and at 6 locations within the canal (plus one barometric transducer) to evaluate tidal influences on the groundwater / surface water system. The monitoring well pairs where the continuous monitoring will be performed were selected to provide full coverage of the length of the canal and include the following monitoring wells listed in the order of their occurrence from the head to the mouth of the canal: 33, 3, 4, 25, 26, 20, 21, 13, 14, 15, and 16.

• One round of groundwater samples will be collected from 66 of the monitoring wells. Sampling will be performed by two teams. The samples will be send for the following analyses:

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− Samples from all wells for TCL Organics and TAL Metals (total and dissolved including Mercury), and Cyanide.

− Samples from 8 of the monitoring well pairs (16 wells) (and surface water from the adjacent canal, 5 locations) for the following water quality parameters: Alkalinity, Ammonia, Calcium, Chlorides, Iron – Total, Iron – Dissolved, Magnesium, Manganese – Total, Manganese – Dissolved, Aluminum, Nitrates, TKN, Organic Carbon – dissolved, Organic Carbon – Total, Potassium, Phosphate, Total Hardness, Silica, Sodium, Sulfates, Total Dissolved solids (TDS), and Total Suspended Solids (TSS). The samples from the canal will be collected from the land and will target the 6 inches of water above the bottom of the canal. The samples will be collected during dry weather and during low tide as close as possible to the end of the groundwater sampling event.

− The monitoring well pairs (shallow and intermediate) that will be sampled for water quality parameters (listed in the order of occurrence from the head to the mouth of the canal and also identified in Attachment 1) are: 2, 3, 4, 9, 11, 12, 15, 16, 18, 31, 37, and 39. These locations were selected to provide full coverage of the length of the canal for assessing groundwater contributions to the canal. This Work Plan includes the sampling of 8 of these pairs for geochemistry parameters. The locations of surface water in the canal that will be sampled will be near monitoring well locations 2,3,8,11,15,18,31,37, and 39. This Work Plan includes the sampling of 5 of these pairs for geochemistry parameters.

− Field measurements of the following water quality parameters will also be collected during groundwater sampling and from the surface water sampling locations: Salinity, pH, Specific conductance, Dissolved Oxygen, Oxidation Reduction Potential (ORP), Temperature, and Turbidity. In addition, field measurement of Ferrous (+II) Iron will be conducted in the 8 monitoring well pairs and surface water samples sampled for water quality parameters.

− Water quality analyses will characterize the chemistry of canal water and groundwater across the breadth of the site including cation/anions composition, oxidation/reduction potential, the presence of nutrients, biological activity, and native acidity. In concert with the evaluation of water levels, these analyses can help determine the bulk and spatial, contribution of groundwater to the canal. A suite of tools will be utilized including ternary diagrams, water quality mapping, phase diagrams, and geochemical modeling to evaluate the water quality data

− The sampling will be performed a minimum of two weeks following installation and development of the new monitoring wells. Sampling will be performed using submersible pumps following EPA’s low-flow groundwater sampling procedures.

Field days are estimated at 12 hours. This task is budgeted based on linear progression of each sampling effort. The estimated duration of groundwater sampling using two teams, one round of synoptic water level measurements and the continuous water level monitoring event 14 days. It is assumed that there will be no delays associated with gaining access for the performance of the planned activities and no weather and traffic control delays.

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As noted previously, the time for the FOM is budgeted under Task 5.1 and cooler shipping costs and consumable / expendable supplies are budgeted under subtask 3.3. During the field activities, the following will be performed by the field team: • Daily calls between EPA, PM/Assistant PM, RI lead, and FOM to discuss progress,



also will be recorded in the field log book and on field forms at the time of sampling) • Weekly downloading of photographic documentation • Weekly creation of photographic log • Daily assembling of field documentation • Daily status reports to EPA on completed activities • Property control representative Complete field documentation and summary of field activities Shortly after each field effort is completed, a field summary documenting the completed field activities will be prepared. The summary will contain: a monitoring well map showing as-installed locations, data tables showing field-collected data from the groundwater and continuous water level monitoring event, sample summary tables, description of completed field activities and the methods used, major field observations, and deviations from the planned activities. The field summaries are needed to support continuation of project decisions until the RI Report is initiated after all the field activities are completed. The summary will be provided in draft form.

2.3.4 Subtask 3.6 Cultural Resources Tasks

The scope of work described under this subtask will be completed by a subcontractor specializing in the needed services. This subtask includes a site visit by the PM or Assistant PM and RI lead to review the site and the scope of work with the selected subcontractor. Oversight of subcontractor site activities is not anticipated to be provided. This task assumes one draft and one final report.

The following tasks, associated with cultural resources, will be completed by the specialty firm to identify those Historic Properties, as characterized by the criteria of eligibility for nomination to the National Register of Historic Places, which would be effected by the project actions.

• Carry out a detailed interpretation of GEI’s magnetometer report with respect to identification of anomalies representing potential historic properties. Recommendations will be made for specific ground truth verification work for archeological targets within the survey area.

33

• Review available cultural resources reports that have been prepared in conjunction with an evaluation of the historic corridor represented by Gowanus Canal. The review will aid in determining the adequacy of the studies to the needs of the project to address specific aspects of historic properties in the area of potential effect (APE); the scope of subsequent work beyond that addressed in these studies; and the likely effects of the current project on the historic properties identified to date, in the existing reports. The reports include but are not limited to:

o Final Report National Register of Historic Places Eligibility Evaluation and Cultural Resources Assessment for the Gowanus Canal, prepared by Hunter Research Inc., December 2004.

o Gowanus Canal Bulkhead Inventory Survey, prepared by Adam Brown, Marine Consulting, July 2000.

o Gowanus Canal Corridor, Spring 2008.

o Gowanus Canal Sponge Park, Diamond Studio, Gowanus Canal Conservancy.

• Review of dredging projects that have been carried out across the country in conjunction with hazardous materials removal programs by federal agencies. The review will outline the nature of avoidance, minimization and mitigation actions taken with respect to historic properties in these settings. Constraints associated with the hazardous nature of the dredge material will be recognized. Specific focus will be on settings most congruent with the constraints imposed on the canal by its hardened shoreline.

• A general review of historic bulkheads will be conducted in terms of the parameters of their significance and their potential eligibility for nomination to the NRHP.

2.3.5. Subtask 3.7 Investigation Derived Waste Characterization and Disposal

EPA’s Emergency Response Team (ERT) will be providing the storage roll off and tank and associated transport and disposal services for the drill cuttings and development / decontamination water. These services are assumed to be available through the risk assessment sampling, monitoring well installation, and groundwater sampling events. Included in this Work Plan are only the services for the collection and disposal of PPE and used sampling supplies from the performed filed activities and water accumulated after the tank provided by ERT is removed at the end of the groundwater sampling event. Estimates of the quantities of drums expected are listed below. For the purpose of developing the associated costs, this Work Plan assumes that all wastes will be non-hazardous.

34

Summary of IDW Waste Streams

Waste Disposal Classification

Container Type Estimated Quantity of Drums

Excess plastic sheeting, used sample mixing pans and scoops, PPE

Contaminated, Non-Hazardous

55-Gallon Drum 15 drums

Decontamination water generated from activities after the storage tank is removed at the end of the groundwater sampling event

Contaminated, non-Hazardous

55-Gallon Drum 5 drums

Drums are assumed to be staged on the IDW staging property. At this location, the drums will be segregated by waste type. Two removal events are assumed – one after the completion of the risk assessment sampling and one after the completion of the remaining events. Waste characterization samples will be taken to represent all drill cuttings placed by the HDR project team in the roll off rented by ERT. The characterization samples will be composite samples over the lengths of the soil cores and analyzed for the following: TCLP, RCRA characteristics (ignitability, corrosivity, and reactivity), TCL Organics, TAL Metals (including Mercury), and Cyanide. The results will be provided to ERT who will be responsible for preparing the waste profile and manifest, overseeing waste removal, and completing any associated paperwork. Sampling of the water accumulated in the storage tank will be performed by ERT. Water accumulated in drums following removal of the storage tank will be sampled as part of this Work Plan for TCL Organics, TAL Metals, and RCRA characteristics. Analyses will be requested on two weeks turnaround time. The following IDW characterization samples are assumed to be required: 15 soil samples and 5 water samples. Based on the results, a recommendation will be provided to EPA on the characterization of the wastes (PPE and drums of water included in this Work Plan) prior to preparing waste profiles and manifests and arranging for the offsite transport of the wastes for disposal.

35

This Work Plan assumes that the EDD format submittals that will be received from CLP will be acceptable as supporting information for the characterization and manifesting of the wastes. The preparation of summary results to support disposal is not included. Waste removal is assumed to require two days. Sampling of drums is assumed to require one day.

2.4. Task 4 Sample Analysis

2.4.1. Subtask 4.1 Sample Analysis Tables 1 and 2 in Attachment 1 list the estimated number of samples planned to be collected and the laboratories planned for these analyses. Based on discussions with SMO, some of these analyses are not available through CLP and DESA and should be included in the Work Plan costs because subcontracted laboratory services will be required for these analyses. This subtask includes the costs for subcontracted laboratories to perform the analyses identified in Table 1 as not available through CLP and DESA. This Work Plan assumes that the laboratory that will be procured directly by the EPA for the PCB congeners analyses of tissue samples will process the received fish and crabs specimens and prepare tissue samples for analyses. This laboratory will also ship the appropriate sample volumes to the designated CLP laboratories for TCL and TAL analyses and to the laboratory subcontracted under this Work Plan for testing for percent lipids. 2.5. Task 5 Analytical Support and Data Validation

2.5.1. Subtask 5.1 Collect, Prepare, and Ship Samples This subtask covers the ecological and human health risk and groundwater sampling and includes the following activities for the estimated duration of field activities: • Establish the sample nomenclature • Establish the sample tracking system • Provide a FOM for the duration of the field activities – estimated at 75 field days

2.5.2. Subtask 5.2 Sample Management This subtask covers the ecological and human health risk and groundwater sampling and includes the following sample management for the estimated duration of field activities: • Maintain sample tracking system to track samples from collection to receipt of the data

from the laboratories. • Track receipt of data (draft and final, electronic and hard copy) for all analyses • Provide EPA’s Sample Management Office (SMO) with forecasts of the expected number

of samples and analyses - weekly covering 15 weeks of field work. • Prepare an estimated number of 15 case reports for the samples analyzed through CLP. • Prepare an estimated 4 ANSET reports for the samples analyzed outside of CLP.

36

• Resolve analytical issues / questions with the laboratories (CLP, DESA, and non-CLP) for the estimated 15 weeks of field activities.

2.5.3. Subtask 5.3 Data Validation

This subtask covers the ecological, human health, and groundwater samples – a total of 2744 analyses. The following activities are included: • Review the hard copies of the validated data packages versus the electronic files and

correct inconsistencies in the results. It is assumed that the results will be verified for all samples analyzed outside of CLP and 10% of the samples analyzed through CLP (562 samples).

• Resolve outstanding issues related to qualifiers identified as a result of this review (for example, if validated reports do not indicate which of two duplicate / re-extracted analyses performed by the laboratory on the same sample should be used for reporting; this requires review of the laboratory data package by a chemist in order to resolve).

• Review the analytical results to assess the effects of the QA/QC exceedances (found in the data validator reports) on the usability of the data as compared to the established objectives in the UFP-QAPP (17 matrices and eight different types of analyses with a total of 300 samples per matrix per analysis).

• Review the analytical results to compare the quantitation levels to the project action levels as established in the UFP-QAPP to also assess the usability of the data (same number of matrices and analyses).

• Prepare summary report on the quality of the data for each sampled matix and for each group of analyses (same number of matrices and analyses).

3.0. Project Management Approach This section describes the management approach for the project. The scope and LOE associated with project management are included under Task 1. 3.1. Project Organization The HDR project team will provide project administration and management support to complete the work assignment. The project organization will remain as described in the Phase 1 and 2 Work Plans. 3.2. Project Schedule The project schedule is dependent on the approval of this Work Plan. For the purposes of preparing this Work Plan, the duration is assumed to be 4 months. The major project submittals required to begin field activities and the corresponding due date requirements for submittal by HDR and receipt of EPA comments are summarized below. The HDR project team is committed to completing the work assignment on-time and will work diligently with the entire project team to achieve this end.

37

3.3. Cost Estimate The cost estimate for completing the scope of work described in this Work Plan has been submitted under separate cover as Volume 2.

38

Schedule of Phase 3 Deliverables to Meet to Begin Field Activities Submit Draft RI/FS Work Plan to EPA – May 18, 2010 Receipt of EPA comments on Draft Work Plan – by May 28, 2010 Revise RI/FS Work Plan based on EPA comments – Within 5 working days of receipt of EPA comments Submit Draft QAPP to EPA – 2 weeks after Work Plan submittal Revise QAPP based on EPA comments and Receive EPA approval of QAPP – Within 3 working days of receipt of EPA comments Submit Draft HASP to EPA – 1 week after Work Plan submittal Revise HASP based on EPA comments and Receive EPA approval of QAPP – Within 3 working days of receipt of EPA comments

ATTACHMENT 1

FIGURES

307B

308B313

315

324325

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321

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LegendSurface Sediment and Surface Water Sample Location

Study Area

FIGURE 1Surface Sediment and Surface Water Sample Location

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313315

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Study Area

FIGURE 2Proposed Surface Sedimentand Surface Water Sample

Reference Locations

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FIGURE 2aProposed Surface Sedimentand Surface Water Sample

Reference Locations

0 500 1,000Feet

´

\\PERSEUS\PROJ\USARMYCORPSOFENGINEE\395863GOWANUS\GIS\MAPFILES\FIGURE3_PROPOSED_TISSUE_SAMPLING_AREAS.MXD FCAIN 4/27/2010 12:53:43

Legend

Canal Reach Boundary

Study Area

FIGURE 3Proposed Tissue Sampling Areas

406

405

404

403

402

401

406 Canal Reach ID

407

18TH ST

3RD ST

1 ST

PRESIDENT ST

WYCKOFF STC

OLU

MBI

A ST

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PKIN

S P

L

3RD

AVE

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AVE

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15TH ST

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ITH

ST

CO

UR

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D AV

E

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UNION ST

10TH ST11TH ST

5TH

AVE

7TH ST

8TH ST

HO

YT S

T

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16TH ST

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BOND

ST

1 PL

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4 PL

CLI

NTO

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RY

ST DE GRAW ST

17TH ST

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KS S

T

W 9TH ST

BALTIC ST

4TH ST

1ST ST

DOUGLASS ST

NEVI

NS S

T

LUQUER ST

BUTLER ST

LORRAINE ST

BAY ST

BUSH ST

PROSPECT AVE

NELSON ST

20TH ST

CENTRE ST

HUNTINGTON ST

CREAMER ST

GARNET ST

CARROLL ST

BRYANT ST

PRESIDENT ST

HAM

ILTO

N PL

SUMMIT ST

RAPELYE ST

WOODHULL ST

HALLECK ST

DEN

NET

T PL

COLES ST

4TH

AVE

HEN

RY S

T

CARROLL ST

2 ST

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BAY ST

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BQE

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ILTON AVE

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PROSPECT EXPRESSWAY

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CO

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6TH ST

HAMILTO

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\\PERSEUS\PROJ\USARMYCORPSOFENGINEE\395863GOWANUS\GIS\MAPFILES\FIGURE4_PROPOSED_AIR_MONITORING_LOCATIONS.MXD FCAIN 4/27/2010 12:55:11

Legend

Proposed Air Monitoring Locations

Proposed Background Air Monitoring Locations

Study Area

Figure 4Proposed Air Monitoring Locations

18TH ST

3RD ST

1 ST

PRESIDENT ST

WYCKOFF ST

CO

LUM

BIA

ST

TOM

PKIN

S PL

3RD

AVE

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4TH

AVE

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15TH ST

3RD ST

SMIT

H ST

CO

UR

T ST 2N

D AV

E

12TH ST

13TH ST

UNION ST

10TH ST11TH ST

5TH

AVE

7TH ST

8TH ST

HOYT

ST

SACKETT ST

16TH ST

2ND ST

BON

D ST

1 PL

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CLI

NTO

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T

3 PL

HE

NRY

ST DE GRAW ST

17TH ST

HIC

KS S

T

W 9TH ST

BALTIC ST

4TH ST

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NEVI

NS

ST

LUQUER ST

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NELSON ST

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BRYANT ST

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HAM

ILTON

PL

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WOODHULL ST

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DEN

NET

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AVE

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ST

CARROLL ST

2 ST

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ANUS EXPRE

SSWAY

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A

METROPOLITANFORMER MGP SITE

FULTON FORMERMGP SITECARROLL GARDENS/

PUBLIC PLACEFORMER CITIZENSGAS WORKS MGP SITE

USEEXISTING

WELLS

USEEXISTING

WELLS

USEEXISTING

WELLS

78

9

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2120

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LegendProposed Well Pair Locationinstalled by NYCProposed Intermediate Well Location installed by National Grid (Supplements Existing Shallow Well)Proposed Well Pair Location installed by USEPA

Former MGP Site

City of NY Site

Con Edison 3rd Ave. Service Yard

Former U.S. Navy

Other Facilities

Figure 5Proposed Monitoring Well Locations

ATTACHMENT 1

TABLES

TA

L M

etal

s +

Hg

Filte

red

TA

L

Met

als +

Hg

Cya

nide

TC

L V

OC

s

TC

L S

VO

Cs

TC

L P

CB

s

TC

L P

estic

ides

PCB

Con

gene

rs

(4)

TO

C

Gra

in si

ze

AV

S/SE

M

TSS

Geo

chem

istr

y (3

)

TO

-15

VO

Cs

TO

-13A

PC

Bs

TO

-14

LM

W-

PAH

sB

ioas

say

/ to

xici

ty

% m

oist

ure

Lip

id c

onte

nt

Dry weather 37 37 37 37 37 37 37 37Wet weather 37 37 37 37 37 37 37 37

Surface Sediment (1) No CSO discharges into canal 37 37 37 37 37 37 11 37 37 37Sediment Toxicity

testingNo CSO discharges into canal 16

Mummichug 11 11 11 11 11Blue crab 22 22 22 22 22 22Striped bass 22 22 22 22 22White perch 22 22 22 22 22

Subsurface soil (1) NA 80 80 80 80 80 80Groundwater samples NA 81 81 81 81 81 81 81 16

Surface water During grundwater sampling event 5CSO - sediment Dry weather 10 10 10 10 10 10 10 10

Dry weather event 10 10 10 10 10 10 10 10Wet weather event 1 10 10 10 10 10 10 10 10Wet weather event 2 10 10 10 10 10 10 10 10Wet weather event 3 10 10 10 10 10 10 10 10

Air Samples Dry weather before start of aeration 23 1 23Dry weather after start of aeration 23 1 23

(1) Sample volume will be archived for future analyses. (3) Includes TSS. Analyses through subcontracted laboratories, costs included.(2) Number of samples do not include QA/QC samples. (4) SMO will subcontract directly for these analyses.

Table 1Summary of Phase 3 Sampling Program

Gowanus Canal RI/FSBrooklyn, New York

CSO - water

Media Sampling comments Number of Analyses Required (2)

Tissue Samples

Surface Water

Page 1 of 7

TAL

Met

als

+ H

g

TAL

Met

als

+ H

g Fi

ltere

d

Cya

nide

Cya

nide

- Fi

ltere

dTC

L VO

Cs

TCL

SVO

Cs

TCL

PCB

s

TCL

Pest

icid

es

PCB

Con

gene

rs

TOC

Gra

in s

ize

Arc

hive

AVS

/SEM

TSS

Geo

chem

istr

y pa

ram

eter

sTO

-15

VOC

s

TO-4

A P

CB

s

TO-1

3 LM

W-

PAH

sB

ioas

say

/ to

xici

ty

% m

oist

ure

Lipi

d co

nten

t

GC-SW301-0.5-DWGC-SW301-0.5-WWGC-SW302-0.5-DWGC-SW302-0.5-WWGC-SW303-0.5-DWGC-SW303-0.5-WWGC-SW304-0.5-DWGC-SW304-0.5-WWGC-SW305-0.5-DWGC-SW305-0.5-WWGC-SW306-0.5-DWGC-SW306-0.5-WWGC-SW307A-0.5-DWGC-SW307A-0.5-WWGC-SW307B-0.5-DWGC-SW307B-0.5-WWGC-SW308A-0.5-DWGC-SW308A-0.5-WWGC-SW308B-0.5-DWGC-SW308B-0.5-WWGC-SW309-0.5-DWGC-SW309-0.5-WWGC-SW310-0.5-DWGC-SW310-0.5-WWGC-SW311-0.5-DWGC-SW311-0.5-WWGC-SW312-0.5-DWGC-SW312-0.5-WWGC-SW313-0.5-DWGC-SW313-0.5-WWGC-SW314-0.5-DWGC-SW314-0.5-WWGC-SW315-0.5-DWGC-SW315-0.5-WWGC-SW316-0.5-DWGC-SW316-0.5-WWGC-SW317-0.5-DWGC-SW317-0.5-WWGC-SW318-0.5-DWGC-SW318-0.5-WWGC-SW319-0.5-DWGC-SW319-0.5-WWGC-SW320-0.5-DWGC-SW320-0.5-WWGC-SW321-0.5-DWGC-SW321-0.5-WWGC-SW322-0.5-DWGC-SW322-0.5-WWGC-SW323-0.5-DWGC-SW323-0.5-WWGC-SW324-0.5-DWGC-SW324-0.5-WWGC-SW325-0.5-DWGC-SW325-0.5-WWGC-SW326-0.5-DWGC-SW326-0.5-WWGC-SW327-0.5-DWGC-SW327-0.5-WWGC-SW328-0.5-DWGC-SW328-0.5-WWGC-SW329-0.5-DWGC-SW329-0.5-WWGC-SW330-0.5-DWGC-SW330-0.5-WWGC-SW331-0.5-DWGC-SW331-0.5-WWGC-SW332-0.5-DWGC-SW332-0.5-WW

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

XX X X X X332 664372.42 622376.71 Reference location (situated on mudflat) Surface sediment/surface water reference location sutuated downstream from mouth of canal

X X

XX XSurface sediment/surface water reference location sutuated downstream from mouth of canal

X X X X X331 670519.80 624165.04 Reference location (situated on mudflat)


X X


X X X X X329 665396.99 625264.11 Reference location

XX X X X X328 668675.58 625711.19 Reference location Surface sediment/surface water reference location sutuated downstream from mouth of canal

X X



XX X X X X326 667743.80 628773.60 Reference location Surface sediment/surface water reference location sutuated downstream from mouth of canal

X X

XX XSpatial coverage of Gowanus Creek Channel X X X X X325 668818.18 630216.52 Downstream of Gowanus Expressway

XX X X X X324 668978.22 630523.81 Downstream of Gowanus Expressway Spatial coverage of Gowanus Creek Channel X X

XX XCSO; spatial coverage X X X X X323 668512.32 630633.28 CSO (OH-006)

XX X X X X322 668781.09 630852.22 Downstream of Gowanus Expressway Spatial coverage of Gowanus Creek Channel X X

XX XSpatial coverage of Gowanus Creek Channel X X X X X321 669038.58 631033.49 Downstream of Gowanus Expressway

XX X X X X320 669869.83 631129.57 CSO (RH-031) and Hamilton Avenue crossing CSO; spatial coverage; Human health exposure point X X

XX XFormer Metropolitan MGP site; High surface sediment PAH concentrations for evaluation in BERA

X X X X X319 670310.16 631481.48 Former Metro. MGP site

XX X X X X318 670344.18 631686.67 11th St. Basin, former Metro. MGP site Former Metropolitan MGP site; Potential for exposed sediment at low tide

X X

XX XCSO; human health exposure point X X X X X317 670951.79 631864.91 Storm sewer outfalls (RH-008 and RH-032) and 9th St. bridge crossing

XX X X X X316 670990.44 632450.87 7th St. Basin Potential for exposed sediment at low tide X X

XX XFormer MGP site X X X X X315 671285.67 632011.79 Carroll Gardens/Public Place

XX X X X X314 671128.04 632928.61 6th St. Basin Potential for exposed sediment at low tide X X

XX XFormer MGP site X X X X X313 671566.97 632297.41 Carroll Gardens/Public Place

XX X X X X312 671571.77 632886.87 CSO (RH-035) CSO; spatial coverage; Upstream of CG/PP former MGP site

X X

XX XCSO; spatial coverage X X X X X311 671417.16 633287.31 CSO (OH-007)

XX X X X X310 671035.17 633836.47 4th Street Basin Potential for exposed sediment at low tide X X

XX XHuman health exposure point X X X X X309 671562.74 633478.87 3rd St. bridge crossing

XX X X X X308B Based on observations

Based on observations

Canoe launch - south section from exposed sediment Human health exposure point X X

XX XHuman health exposure point X X X X X308A Based on observations


Canoe launch - north next to steps from exposed sediment

XX X X X X307B Based on observations


Pipe discharge in the canal, exposed sediment Human health exposure point X X

XX XCSO; human health exposure point X X X X X307A 672302.69 633815.12 CSO (OH-005) and Carroll St. bridge crossing

XX X X X X306 672597.43 633915.40 CSO (RH-036) CSO; spatial coverage X X

CSO (RH-037) CSO; spatial coverage X X

XX XHuman health exposure point X X X X X

Near former MGP site; high surface sediment PAH concentrations for evaluation in BERA

X X X X X

305 672782.28 633995.68 Union St. bridge crossing

XX X X X X304 673070.09 634156.56

303 673198.13 634233.98 Former Fulton MGP site

XX X X X X

XX X

X XHead of canal; thick sediment mound from CSO discharges; exposed sediment at low tide (note: area

f C f CSO )

X X X X XX

X

Rationale Analyses RequiredNorthing Easting

Surface Water (2 rounds)2

301 673636.97 634433.56 CSO (RH-034)

Table 2Detailed Description of Phase 3 Sampling Program

Gowanus Canal RI/FSBrooklyn, New York

Location Type Location ID Sample ID Coordinates 1 Description

302 673300.31 634273.62 CSO (RH-038) CSO; spatial coverage X X

X

Page 2 of 7

TAL

Met

als

+ H

g

TAL

Met

als

+ H

g Fi

ltere

d

Cya

nide

Cya

nide

- Fi

ltere

dTC

L VO

Cs

TCL

SVO

Cs

TCL

PCB

s

TCL

Pest

icid

es

PCB

Con

gene

rs

TOC

Gra

in s

ize

Arc

hive

AVS

/SEM

TSS

Geo

chem

istr

y pa

ram

eter

sTO

-15

VOC

s

TO-4

A P

CB

s

TO-1

3 LM

W-

PAH

sB

ioas

say

/ to

xici

ty

% m

oist

ure

Lipi

d co

nten

t



GC-SW33-0.5-DWGC-SW33-0.5-WWGC-SW334-0.5-DWGC-SW334-0.5-WWGC-SW335-0.5-DWGC-SW335-0.5-WW

301 GC-SD301-0.0-0.5 673636.97 634433.56 CSO (RH-034) Head of canal; thick sediment mound from CSO X X X X X X X X X X X302 GC-SD302-0.0-0.5 673300.31 634273.62 CSO (RH-038) CSO; spatial coverage X X X X X X X X X X303 GC-SD303-0.0-0.5 673198.13 634233.98 Former Fulton MGP site Near former MGP site; high surface sediment PAH X X X X X X X X X X X304 GC-SD304-0.0-0.5 673070.09 634156.56 CSO (RH-037) CSO; spatial coverage X X X X X X X X X X305 GC-SD305-0.0-0.5 672782.28 633995.68 Union St. bridge crossing Human health exposure point X X X X X X X X X X X306 GC-SD306-0.0-0.5 672597.43 633915.40 CSO (RH-036) CSO; spatial coverage X X X X X X X X X X

307A GC-SD307A-0.0-0.5 672302.69 633815.12 CSO (OH-005) and Carroll St. bridge crossing CSO; human health exposure point X X X X X X X X X X X X307B GC-SD307B-0.0-0.5 Based on

observationsBased on

observationsPipe discharge in the canal, exposed sediment Human health exposure point X X X X X X X X X X X

308A GC-SD308A-0.0-0.5 Based on observations


Canoe launch - north next to steps from exposed sediment Human health exposure point X X X X X X X X X X X

308B GC-SD308B-0.0-0.5 Based on observations


Canoe launch - south section from exposed sediment Human health exposure point X X X X X X X X X X X

309 GC-SD309-0.0-0.5 671562.74 633478.87 3rd St. bridge crossing Human health exposure point X X X X X X X X X X X310 GC-SD310-0.0-0.5 670974.98 633786.69 4th Street Basin Potential for exposed sediment at low tide X X X X X X X X X X X311 GC-SD311-0.0-0.5 671417.16 633287.31 CSO (OH-007) CSO; spatial coverage X X X X X X X X X X312 GC-SD312-0.0-0.5 671571.77 632886.87 CSO (RH-035) CSO; spatial coverage; Upstream of CG/PP former MGP X X X X X X X X X X X313 GC-SD313-0.0-0.5 671566.97 632297.41 Carroll Gardens/Public Place Former MGP site X X X X X X X X X X X314 GC-SD314-0.0-0.5 671128.04 632928.61 6th St. Basin Potential for exposed sediment at low tide X X X X X X X X X X X315 GC-SD315-0.0-0.5 671285.67 632011.79 Carroll Gardens/Public Place Former MGP site X X X X X X X X X X X316 GC-SD316-0.0-0.5 670990.44 632450.87 7th St. Basin Potential for exposed sediment at low tide X X X X X X X X X X317 GC-SD317-0.0-0.5 670951.79 631864.91 Storm sewer outfalls (RH-008 and RH-032) and 9th St. CSO; human health exposure point X X X X X X X X X X318 GC-SD318-0.0-0.5 670344.18 631686.67 11th St. Basin, former Metro. MGP site Former Metropolitan MGP site; Potential for exposed X X X X X X X X X X X319 GC-SD319-0.0-0.5 670310.16 631481.48 Former Metro. MGP site Former Metropolitan MGP site; High surface sediment X X X X X X X X X X X320 GC-SD320-0.0-0.5 669869.83 631129.57 CSO (RH-031) and Hamilton Avenue crossing CSO; spatial coverage; Human health exposure point X X X X X X X X X X X321 GC-SD321-0.0-0.5 669038.58 631033.49 Downstream of Gowanus Expressway Spatial coverage of Gowanus Creek Channel X X X X X X X X X X X322 GC-SD322-0.0-0.5 668781.09 630852.22 Downstream of Gowanus Expressway Spatial coverage of Gowanus Creek Channel X X X X X X X X X X323 GC-SD323-0.0-0.5 668512.32 630633.28 CSO (OH-006) CSO; spatial coverage X X X X X X X X X X324 GC-SD324-0.0-0.5 668978.22 630523.81 Downstream of Gowanus Expressway Spatial coverage of Gowanus Creek Channel X X X X X X X X X X X325 GC-SD325-0.0-0.5 668818.18 630216.52 Downstream of Gowanus Expressway Spatial coverage of Gowanus Creek Channel X X X X X X X X X X X326 GC-SD326-0.0-0.5 667743.80 628773.60 Reference location Surface sediment/surface water reference location X X X X X X X X X X X X327 GC-SD327-0.0-0.5 667359.60 626903.80 Reference location Surface sediment/surface water reference location X X X X X X X X X X328 GC-SD328-0.0-0.5 668675.58 625711.19 Reference location Surface sediment/surface water reference location X X X X X X X X X X X329 GC-SD329-0.0-0.5 665396.99 625264.11 Reference location Surface sediment/surface water reference location X X X X X X X X X X X330 GC-SD330-0.0-0.5 667222.57 624612.12 Reference location (situated on mudflat) Surface sediment/surface water reference location X X X X X X X X X X X X331 GC-SD331-0.0-0.5 670519.80 624165.04 Reference location (situated on mudflat) Surface sediment/surface water reference location X X X X X X X X X X332 GC-SD332-0.0-0.5 664372.42 622376.71 Reference location (situated on mudflat) Surface sediment/surface water reference location X X X X X X X X X X333 GC-SD33-0.0-0.5 667166.68 622190.43 Reference location (situated on mudflat) Surface sediment/surface water reference location X X X X X X X X X X X X334 GC-SD334-0.0-0.5 662490.95 619805.99 Reference location (situated on mudflat) Surface sediment/surface water reference location X X X X X X X X X X335 GC-SD335-0.0-0.5 674375.88 623699.33 Reference location Surface sediment/surface water reference location X X X X X X X X X X

GC-TI401-MCG-WB 673676.865 634443.3842 X X X X X

672609.343 633907.1705GC-TI402-MCG-WB 672609.343 633907.1705 X X X X X

671560.4708 633474.7483GC-TI403-MCG-WB 671560.4708 633474.7483 X X X X X

671507.6577 632279.0675GC-TI404-MCG-WB 671507.6577 632279.0675 X X X X X

670965.2733 631855.0662GC-TI405-MCG-WB 670965.2733 631855.0662 X X X X X

669829.6991 631156.0336GC-TI406-MCG-WB 669829.6991 631156.0336 X X X X X

668375.4678 630223.005407A GC-TI407A-MCG-WB 667297.082 627629.919 Trap will be initally set at sediment location 326. Biological tissue reference location X X X X X407B GC-TI407B-MCG-WB 668675.584 625711.194 Trap will be initally set at sediment location 328. Biological tissue reference location X X X X X407C GC-TI407C-MCG-WB 665396.985 625264.112 Trap will be initally set at sediment location 329. Biological tissue reference location X X X X X407D GC-TI407D-MCG-WB 667222.569 624612.118 Trap will be initally set at sediment location 330. Biological tissue reference location X X X X X407E GC-TI407E-MCG-WB 667166.684 622190.425 Trap will be initally set at sediment location 333. Biological tissue reference location X X X X X

GC-TI401-BC-ED 673676.865 634443.3842 X X X X X XGC-TI402-BC-HP X X X X X X

672609.343 633907.1705GC-TI402-BC-ED 672609.343 633907.1705 X X X X X X

X

X

X

President Street to 3rd Street Bridge ; this reach Spatial coverage of Gowanus Canal

406 Downstream of Gowanus Expressway; this sampling reach encompasses surface water and sediment sampling locations 320-325.

Spatial coverage of Gowanus Canalto

Tissue Samples Blue Crab3. 4 (Note

a split for each location

for archiving)

401 Head of canal to President Street (half way between Union and Carrol Street Bridges). This encompasses sediment and surface water locations 301-306.


402

404 South of the turning basin between 5th and 6th Streets to the 9th Street Bridge. This reach encompasses surface water and sediment sampling stations 313-317.


405 9th Street Bridge to Gowanus Expressway; this sampling reach encompasses surface water and sediment sampling locations 317-320.



403 3rd Street Bridge through and including the turning basin between 5th and 6th Street. This reach also includes the 5th Street turning basin; the surface water and sediment

li l ti d i thi h i l d 309


Surface Sediment

Tissue Samples -Mummichog3. 4

(Note a split for each

location for archiving)



402 President Street to 3rd Street Bridge ; this reach encompasses sediment and surface water locations 306-309.




X X


X X X X X333 667166.68 622190.43 Reference location (situated on mudflat)

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GC-TI402-BC-HP X X X X X X671560.4708 633474.7483

GC-TI403-BC-ED 671560.4708 633474.7483 X X X X X XGC-TI403-BC-HP X X X X X X

671507.6577 632279.0675GC-TI404-BC-ED 671507.6577 632279.0675 X X X X X XGC-TI404-BC-HP X X X X X X



668375.4678 630223.005GC-TI407A-BC-ED X X X X X XGC-TI407A-BC-HP X X X X X XGC-TI407B-BC-ED X X X X X XGC-TI407B-BC-HP X X X X X XGC-TI407C-BC-ED X X X X X XGC-TI407C-BC-HP X X X X X XGC-TI407D-BC-ED X X X X X XGC-TI407D-BC-HP X X X X X XGC-TI407E-BC-ED X X X X X XGC-TI407E-BC-HP X X X X X XGC-TI401-SB-ED 673676.865 634443.3842 X X X X XGC-TI401-SB-WB X X X X X

672609.343 633907.1705GC-TI402-SB-ED 672609.343 633907.1705 X X X X XGC-TI402-SB-WB X X X X X





668375.4678 630223.005GC-TI407A-SB-ED X X X X XGC-TI407A-SB-WB X X X X XGC-TI407B-SB-ED X X X X XGC-TI407B-SB-WB X X X X XGC-TI407C-SB-ED X X X X XGC-TI407C-SB-WB X X X X XGC-TI407D-SB-ED X X X X XGC-TI407D-SB-WB X X X XX XGC-TI407E-SB-ED X X X X XGC-TI407E-SB-WB X X X X XGC-TI401-WP-ED 673676.865 634443.3842 X X X X XGC-TI401-WP-WB X X X X X

672609.343 633907.1705GC-TI402-WP-ED 672609.343 633907.1705 X X X X XGC-TI402-WP-WB X X X X X

671560.4708 633474.7483GC-TI403-WP-ED 671560.4708 633474.7483 X X X X X

GC-TI403-WP-WB X X X X X

671507.6577 632279.0675

GC-TI404-WP-ED 671507.6577 632279.0675 X X X X XGC-TI404-WP-WB X X X X X



668375.4678 630223.005GC-TI407-WP-ED X X X X XGC-TI407-WP-WB X X X X X

403 3rd Street Bridge through and including the turning basin between 5th and 6th Street. This reach also includes the 5th Street turning basin; the surface water and sediment sampling locations encompassed in this reach include 309-314)

Spatial coverage of Gowanus Canal

to

407E NA NA Fishing will occur in the area where the surface water and sediment locations were selected

Biological tissue reference location

Tissue Samples White Perch3. 4







407A NA NA Fishin will occur in the area where the surface water and sediment locations were selected






NA Fishing will occur in the area where the surface water and sediment locations were selected


407A NA NA Fishing will occur in the area where the surface water and sediment locations were selected


407B NA NA Fishing will occur in the area where the surface water and sediment locations were selected








3rd Street Bridge through and including the turning basin between 5th and 6th Street. This reach also includes the 5th Street turning basin; the surface water and sediment





Tissue Samples Striped Bass3. 4







403

407C NA NA Fishing will occur in the area where the surface water and sediment locations were selected


407D NA


407D 667222.569 624612.118 Trap will be initally set at sediment location 330. Biological tissue reference location

407E 667166.684 622190.425 Trap will be initally set at sediment location 333. Biological tissue reference location

407B 668675.584 625711.194 Trap will be initally set at sediment location 328. Biological tissue reference location

407C 665396.985 625264.112 Trap will be initally set at sediment location 329. Biological tissue reference location

encompasses sediment and surface water locations 306309.

to

403 3rd Street Bridge through and including the turning basin between 5th and 6th Street. This reach also includes the 5th Street turning basin; the surface water and sediment





407A 667297.082 627629.919 Trap will be initally set at sediment location 326. Biological tissue reference location




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GC-TI407B-WP-ED X X X X XGC-TI407B-WP-WB X X X X XGC-TI407C-WP-ED X X X X XGC-TI407C-WP-WB X X X X XGC-TI407D-WP-ED X X X X XGC-TI407D-WP-WB X X X X XGC-TI407E-WP-ED X X X X XGC-TI407E-WP-WB X X X X X

MW-1 GC-MW1SGC-MW1I

MW-2 GC-MW2SGC-MW2I

MW-3 GC-MW3SGC-MW3I

MW-4 GC-MW4SGC-MW4I

MW-5 GC-MW5SGC-MW5I

MW-6 GC-MW6SGC-MW6I

MW-7 GC-MW7SGC-MW7I

MW-8 GC-MW8SGC-MW8I

MW-9 GC-MW9SGC-MW9I

MW-10 GC-MW10SGC-MW10I




















MW-30 GC-MW30I Monitoring well - shallow and intermediate. Assess groundwater conncetion to the canal. X X X X X X XMW-31 GC-MW31I Monitoring well - shallow and intermediate. Assess groundwater conncetion to the canal. X X X X X X X XMW-32 GC-MW32I Monitoring well - shallow and intermediate. Assess groundwater conncetion to the canal. X X X X X X XMW-33 GC-MW33S

GC-MW33IMW-34 GC-MW34S

GC-MW34I

Ground Water (66 wells will be sampled for TCL

& TAL and 8 pairs or 16 wells will be sampled

for geochemistry parameters as

part of this Work Plan)

X X X X XMonitoring well - shallow and intermediate. Assess groundwater conncetion to the canal. X X



X X

X X X X X

X

Monitoring well - shallow and intermediate. Assess groundwater conncetion to the canal. X X

X X X X XMonitoring well - shallow and intermediate. Assess groundwater conncetion to the canal.



X X X X



X X

X X X X X

X





X X X X

XX X X X XMonitoring well - shallow and intermediate. Assess groundwater conncetion to the canal. X X


X X

XX X X X X

X


XX X X X XMonitoring well - shallow and intermediate. Assess groundwater conncetion to the canal.



X X X X



X X

X X X X X

X





X X X X



X X

XX X X X X

X





XX X X X

NA NA Fishin will occur in the area where the surface water and sediment locations were selected


407E NA NA Fishin will occur in the area where the surface water and sediment locations were selected


407B NA NA Fishin will occur in the area where the surface water and sediment locations were selected


407C NA NA Fishin will occur in the area where the surface water and sediment locations were selected


407D

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MW-2 GC-SWMW2 Water in the canal along bulkhead by identified well Groundwater / surface water interractions XMW-3 GC-SWMW3 Water in the canal along bulkhead by identified well Groundwater / surface water interractions XMW-9 GC-SWMW9 Water in the canal along bulkhead by identified well Groundwater / surface water interractions XMW-11 GC-SWMW11 Water in the canal along bulkhead by identified well Groundwater / surface water interractions X

MW-15 GC-SWMW15 Water in the canal along bulkhead by identified well Groundwater / surface water interractions XMW-18 GC-SWMW18 Water in the canal along bulkhead by identified well Groundwater / surface water interractions XMW-31 GC-SWMW31 Water in the canal along bulkhead by identified well Groundwater / surface water interractions XMW-37 GC-SWMW37 Water in the canal along bulkhead by identified well Groundwater / surface water interractions XMW-39 GC-SWMW39 Water in the canal along bulkhead by identified well Groundwater / surface water interractions X

GC-SBMW??I-0-5 Soil boring installed for the purpose of installing Assess soil conditions at locations X X X X X X XGC-SBMW??I-5-10 Soil boring installed for the purpose of installing Assess soil conditions at locations X X X X X X XGC-SBMW??I-10-15 Soil boring installed for the purpose of installing Assess soil conditions at locations X X X X X X XGC-SBMW??I-15-20 Soil boring installed for the purpose of installing Assess soil conditions at locations X X X X X X XGC-SBMW??I-20-25 Soil boring installed for the purpose of installing

intermediate wellAssess soil conditions at locations X X X X X X X

GC-SBMW??I-25-30 Soil boring installed for the purpose of installing Assess soil conditions at locations X X X X X X XGC-SBMW??I-30-35 Soil boring installed for the purpose of installing

intermediate wellAssess soil conditions at locations X X X X X X X

GC-SBMW??I-35-40 Soil boring installed for the purpose of installing Assess soil conditions at locations X X X X X X XGC-SBMW??I-40-45 Soil boring installed for the purpose of installing Assess soil conditions at locations X X X X X X XGC-SBMW??I-45-50 Soil boring installed for the purpose of installing Assess soil conditions at locations X X X X X X XGC-SWRH031-DW-1 CSO dischargeGC-SWRH031-WW-1 through 3GC-SWRH0034-DW-1 CSO dischargeGC-SWRH0034-WW-1 through 3GC-SWRH033-DW-1 CSO dischargeGC-SWRH033-WW-1 through 3GC-SWRH035-DW-1 CSO dischargeGC-SWRH035-WW-1 through 3GC-SWRH037-DW-1 CSO dischargeGC-SWRH037-WW-1 through 3GC-SWRH036-DW-1 CSO dischargeGC-SWRH036-WW-1 through 3GC-SWRH038-DW-1 CSO dischargeGC-SWRH038-WW-1 through 3GC-SW0H005-DW-1 CSO dischargeGC-SWOH005-WW-1 through 3GC-SW0H006-DW-1 CSO dischargeGC-SWOH006-WW-1 through 3GC-SW0H007-DW-1 CSO dischargeGC-SWOH007-WW-1 through 3

RH-031 GC-SDRH031 CSO CSO discharge X X X X X X X XRH-0034 GC-SDRH0034 CSO CSO discharge X X X X X X X XRH-033 GC-SDRH033 CSO CSO discharge X X X X X X X X RH-035 GC-SDRH035 CSO CSO discharge X X X X X X X XRH-037 GC-SDRH037 CSO CSO discharge X X X X X X X XRH-036 GC-SDRH036 CSO CSO discharge X X X X X X X XRH-038 GC-SDRH038 CSO CSO discharge X X X X X X X X

CSO Sediment samples

XX X XOH-007 CSO X X X X

OH-005 CSO X X

XXX X X X X XOH-006 CSO

XX X X X X

RH-038 CSO X X X X

XXX X X X X XRH-036 CSO

XX X X

XX X X X XRH-037 CSO X X

XX X X RH-035 CSO X X X X

XXX X X X X XRH-033 CSO

XX X X X XCSO X X

XX X XCSO X X X X

Subsurface soil MW-? Locations to be

determined

CSO Surface water samples 1

dry and 3 wet rounds)

RH-031

Surface water for geochemistry

evaluation (5 locations to be

sampled as part of this Work

Plan)

X X X X X

RH-0034






X X

XX X X X X

X



Monitoring well - shallow and intermediate. Assess groundwater conncetion to the canal. X X X X X X

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OH-005 GC-SDRH005 CSO CSO discharge X X X X X X X XOH-006 GC-SD0H006 CSO CSO discharge X X X X X X X XOH-007 GC-SD0H007 CSO CSO discharge X X X X X X X X

501 GC-AS501-C East side of canal at DeGraw Street-canoe level Measure breathing zone for boaters within canal; spatial X X501 GC-AS501-S East side of canal at DeGraw Street-street level Measure breathing zone at street level; spatial coverage X X502 GC-AS502-C West side of canal at Union Street Bridge-canoe level Measure breathing zone for boaters within canal; spatial X X502 GC-AS502-S West side of canal at Union Street Bridge-street level Measure breathing zone at street level; spatial coverage X X503 GC-AS503-C East side of canal at Carroll Street Bridge-canoe level Measure breathing zone for boaters within canal; spatial X X503 GC-AS503-S East side of canal at Carroll Street Bridge-street level Measure breathing zone at street level; spatial coverage X X504 GC-AS504-C 2nd street, at canoe launch and in front of property planned Measure breathing zone for boaters within canal; spatial X X504 GC-AS504-S 2nd street, at canoe launch and in front of property planned Measure breathing zone at street level; spatial coverage X X505 GC-AS505-C East side of canal at 3rd Street Bridge-canoe level Measure breathing zone for boaters within canal; spatial X X505 GC-AS505-S East side of canal at 3rd Street Bridge-street level Measure breathing zone at street level; spatial coverage X X506 GC-AS506-C West side of canal between 4th and 5th street-canoe level Measure breathing zone for boaters within canal; spatial X X506 GC-AS506-S West side of canal between 4th and 5th street-street level Measure breathing zone at street level; spatial coverage X X X507 GC-AS507-C West of the canal on Huntington Street Measure breathing zone for boaters within canal; spatial X X507 GC-AS507-S West of the canal on Huntington Street Measure breathing zone at street level; spatial coverage X X508 GC-AS508-C East side of canal north of 11th Street turning basin-canoe Measure breathing zone for boaters within canal; spatial X X508 GC-AS508-S East side of canal north of 11th Street turning basin-street Measure breathing zone at street level; spatial coverage X X509 GC-AS509-C East side of canal north of Gowanus Expressway-canoe Measure breathing zone for boaters within canal; spatial X X509 GC-AS509-S East side of canal north of Gowanus Expressway-street Measure breathing zone at street level; spatial coverage X X510 GC-AS510-C West side of canal south of Gowanus Expressway-canoe Measure breathing zone for boaters within canal; spatial X X510 GC-AS510-S West side of canal south of Gowanus Expressway-street Measure breathing zone at street level; spatial coverage X X511 GC-AS511-S Intersection of Carroll and Hoyt Streets-street level Air reference location 1 X X512 GC-AS511-S Near intersection Baltic and Hoyt Street-street level Air reference location 2 X X513 GC-AS513-S TBD Air reference location 3 X X

Notes:1 New York State Plane East Zone NAD832 Surface water will be collected during wet (-W) and dry (-D) event

4 Coordinates for tissue sample reaches are from the mid-point of the canal on from the upper and lower extent of the reache

Legend: Bioacc BioaccumulativeTAL Target Analyte ListTCL Target Compound List includes:

volatile organic compounds, semi-volatile organic compounds, pesticides, and PCBsVOC Volatile Organic CompoundSVOC Semi-Volatile Organic CompoundPEST PesticidesPCB Polychlorinated biphenyls TSS Total suspended solidsHg MercuryTOC Total organic carbonAVS/SEM Acid volatile sulfide/simultaneously extracted metals

The composites consist of edible protion (-ED), whole body (-WB), and a composite of edible meat and the hepatopancreas (- HP, for blue crab only).

Geochemistry parameters include: Alkalinity, Ammonia, Calcium, Chlorides, Iron – Total, Iron – Dissolved, Magnesium, Manganese – Total, Manganese – Dissolved, Aluminum, Nitrates, TKN, Organic Carbon – dissolved, Organic Carbon – Total, Potassium, Phosphate, Total Hardness, Silica, Sodium, Sulfates, Total Dissolved solids (TDS), and Total Dissolved Solids (TSS).

Air Samples (2 rounds)

3 Tissue samples are identified by the reach ID, species and composite type. Species as follows: mummichog (MCG), striped bass (SB), white perch (WP), and blue crab (BC)

Page 7 of 7

Table 3 – Target Analyte Lists

Target Analyte List for Tissue Samples

Metals

Arsenic

Cadmium Chromium CLP does not analyze for Cr VI, will use these

results as indication of Cr VI

Copper

Lead Mercury Results for mercury in fish tissue will be considered

as representative of the presence of methylmercury

Nickel

Selenium

Silver

Zinc

PAHs

Acenaphthylene

Acenaphthene

Anthracene

Fluorene

Phenanthrene

Benzo(a)anthracene

Benzo(a)pyrene

Benzo(b)fluoranthene

Benzo(k)fluoranthene

Benzo(g,h,i)perylene

Chrysene

Dibenz(a,h)anthracene

Fluoranthene

Indeno(1,2,3-cd)pyrene

Pyrene

Pesticides

alpha-BHC

beta-BHC

delta-BHC

gamma-BHC (Lindane)

Heptachlor

Aldrin

Heptachlor epoxide

Dieldrin

4,4'-DDE

Endrin

Endosulfan II

4,4'-DDD Endosulfan sulfate Not on the list of bioaccumulators, included

because endosulfan is on the list

4,4'-DDT

Methoxychlor

Endrin ketone Same

Endrin aldehyde Same

alpha-Chlordane Same

gamma-Chlordane Same

PCBs

Congeners

Basis for inclusion on target list: Compounds included are those that were detected in shallow sediments and have bioaccumulating potential. Note that this results in a target list that is reduced from the TCL and TAL list. Because of matrix considerations, this reduced list will be requested for analyses to minimize potential for interferences.

Target Analyte List for Air Samples

VOCs Acetone Benzene Bromodichloromethane Bromoform Carbon Disulfide Chloroform Chlorobenzene Chloromethane Dibromochloromethane Ethylbenzene Methylene Chloride Methyl-tert-butyl ether (MTBE) 2-Butanone Styrene Toluene Trichloroethylene Xylene, total PCBs Aroclor 1016 Aroclor 1221 Aroclor 1232 Aroclor 1242 Aroclor 1248 Aroclor 1254 Aroclor 1260 PAHs Acenaphthene Anthracene Benz[a]anthracene Benzo[a]pyrene Benzo[b]fluoranthene Benzo[k]fluoranthene Chrysene Dibenz[a,h]anthracene Fluoranthene Fluorene Indeno[1,2,3-cd]pyrene Naphthalene Pyrene Acenaphthylene Phenanthrene Benzo(g,h,i) perylene

Basis for inclusion on target list: Compounds included on above list are those that were detected in shallow sediments.