Gowanus Canal Site *206624*

IJ GE I Consultants

Geotechnical Environ me n tal Water Reso urces Ecological

Surface Sediment Sampling Plan Gowanus Canal Site Brooklyn, New York

Submitted to: Submitted by: National Grid USA GEl Consultants, Inc. 287 l'viaspeth A venue 455 Winding Brook Drive Brooklyn, NY 11211 Glastonbmy, CT 06033 860-368-5300

September 2010 093010-2-1201 SURFACE SEDIMENT SAMPLING PLAN NATIONAL GRID GOWANUS CANAL SITE BROOKLYN, NEW YORK SEPTEMBER 2010

Introduction

The United States Environmental Protection Agency (USEPA) is currently performing a Remedial Investigation (RI) on the Gowanus Canal Superfund Site in Brooklyn, New York. The purpose of this RI is to provide an informational foundation for developing, evaluating, and selecting a remedy to eliminate, reduce, or manage risks to human health and the environment associated with the Canal. The USEPA’s Gowanus Canal Draft Final Phase 3 RI Technical Approach and Scope (USEPA 2010) provides the basis for surface sediment sampling activities taking place during the summer of 2010. National Grid, represented by GEI Consultants Inc. (GEI), has identified and outlined additional investigations that are being proposed to supplement USEPA’s field efforts and provide additional data to further assess water quality, sediment quality, sediment toxicity, and benthic surveys of Gowanus Canal. These proposed investigations are presented in the following Surface Sediment Sampling Plan.

Supplemental Field Investigations

Building upon a preliminary RI for Gowanus Canal (GEI 2009a), National Grid previously recommended studies needed to fill information gaps for completing the human health and ecological risk assessment portions of the RI (GEI 2009b). National Grid has also reviewed USEPA (2010) which was provided on May 12, 2010. However, the USEPA studies do not address all of the data gaps necessary to evaluate potential human health or ecological risks from exposure to surface sediments in the Canal. Per the Administrative Order of Consent (AOC) between National Grid and USEPA, National Grid has identified several surface sediment investigations that are needed to supplement USEPA’s RI as described below.

The following supplemental data needs were identified following review of USEPA (2010) and are the subject of this surface sediment sampling plan: - Selection of alternate reference locations - Collection of concurrent and co-located sediment chemistry and benthic community structure data - Evaluation of contaminant bioavailability through interstitial water sampling - Implementation of Sediment Toxicity Identification Evaluations (TIE) to better interpret benthic toxicity testing results - Evaluation of seasonal variation in the physical, chemical, geological and ecological conditions of the Gowanus Canal, and further characterization of conditions while the flushing tunnel is under repair

A detailed outline of proposed sample locations and associated analyses is provided in Table 1 and Figure 1. Supplemental investigations are proposed for the same 27 sample locations within the Gowanus Canal study area identified in Figure 2 of USEPA (2010).

SURFACE SEDIMENT SAMPLING PLAN NATIONAL GRID GOWANUS CANAL SITE BROOKLYN, NEW YORK SEPTEMBER 2010

However, we recommend selection of alternative reference locations to the ten currently identified by USEPA. USEPA Guidance (1995; 2002) suggests that “A background reference area should have the same physical, chemical, geological, and biological characteristics as the site being investigated, but has not been affected by activities on the site.” The biological and physical characteristics of the selected reference locations in the East River do not reflect those of the Gowanus Canal. Additionally, they are located down gradient of the site, resulting in the potential for influence from site-related chemicals of potential concern (COPCs). We recommend regions such as Coney Island Creek, in the New York Bay area, or Bronx Kill and Westchester Creek, in the East River area for reference location samples (Figure 2). If desired, we can provide additional justification for considering these locations in addition to those being currently used by USEPA.

Specific components of the sampling program at each sampling location (including the refernce areas) will include concurrent and co-located measurement of:

. Bulk sediment and associated interstitial water contaminant concentrations – USEPA has completed analytical bulk surface sediment sampling at 27 locations within Gowanus Canal, and at the new reference locations. Interstitial water (i.e., pore water) should also be collected concurrently with bulk sediment sampling to estimate the bioavailability of COPCs such as metals and polycyclic aromatic hydrocarbons (Hawthorne at al. 2005; USEPA 2009). Single composite surficial sediment samples from three Ponar grabs (co- located with the benthic population Ponar samples) will be collected at each sample location. Surficial sediment samples for benthic surveys are typically defined as the upper 10 cm. However, to meet human health data gaps (GEI 2009b); slightly deeper sediments (ca. 1 ft) may need to be collected to constitute a single “surficial” sample for both the human health and ecological risk assessments. Interstitial water can be collected using either in-situ or ex-situ techniques (USEPA 2001). This sampling plan proposes that sediment and interstitial water will be collected concurrently for analytical and toxicity analyses. Therefore, ex-situ sampling techniques are necessary to provide sufficient volume of interstitial water. Solid-phase microextraction (SPME) with gas chromatographic/mass spectrometric (GC/MS) analysis will be implemented for organic compounds, due to its low sample volume requirements and ability to maintain low method detection limits (Hawthorne et al. 2005). The COPCs, physical parameters, and associated USEPA analytical methods used to assess bulk sediment and interstitial water should follow USEPA requirements for derivation of Equilibrium Partitioning Sediment Benchmarks (USEPA 2003). . Surface water quality – Similar to USEPA (2010), we suggest that surface water samples should be collected concurrently with any sediment sampling in the Canal. USEPA has collected discrete surface water samples six inches below the water surface at each of the 27 locations within Gowanus Canal, and at the new reference locations. This sampling

SURFACE SEDIMENT SAMPLING PLAN NATIONAL GRID GOWANUS CANAL SITE BROOKLYN, NEW YORK SEPTEMBER 2010

interval is appropriate for human health evaluation: however, water column depth- integrated samples at the same locations are proposed here to more comprehensively evaluate ecological exposures. . Benthic invertebrate populations – Collection of benthic community data was not included in USEPA (2010). We propose a benthic community assessment concurrent and co-located with surface sediment analytical data, per our previous recommendation (GEI 2009b). Composite Ponar grab samples will be collected at each sample location. Sediment samples used for the benthic invertebrate survey will be passed through a 500 µm sieve. The material that did not pass through the sieve will be placed into a glass container with a 70% ethyl alcohol preservative and transported to an accredited laboratory for the identification (to lowest practical taxonomic level) and enumeration of benthic macroinvertebrates to quantify benthic community structure and composition. . Sediment toxicity – USEPA identified that sediment toxicity test samples would be collected at a subset of 11 of the 27 locations within Gowanus Canal, and at a subset of the new reference locations. GEI previously suggested that the proximate cause of toxicity to benthic macroinvertebrates from Gowanus Canal sediments could result from high concentrations of ammonia rather than exposure to COPCs (GEI 2009b). Such a condition could greatly confound our ability to evaluate the reliability of sediment toxicity testing as a line of evidence for evaluating COPCs in the ecological risk assessment. Therefore, we suggest that Sediment Toxicity Identification Evaluations (TIE; USEPA 2007) should be conducted to rigorously investigate potential confounding factors such as ammonia. Sediment TIE studies consist of a series of sediment manipulations (e.g., chemical amendments) that are designed to identify, by process of elimination, the toxicity of several classes of chemical stressors including cationic metals, non-polar organic toxicants, and ammonia. Such studies can be used both to identify which chemical classes are mostly likely responsible for sediment toxicity, and also to identify possible confounding factors such as ammonia or sulfides. The applicability of the sediment TIE methodology at Superfund sites and other contaminated sites has been studied and proven to be effective (Hunt et al. 2000; Carr et al. 2001; Tracey et al. 2004; Picone et al. 2009; Mehler 2010; Perron et al. 2010). Considering the multiple sources of pollution to sediments located along Gowanus Canal, we believe that TIEs are needed to 1) help identify the most likely cause(s) of toxicity to benthic macroinvertebrates, and 2) determine if non-COPC stressors such as ammonia could confound our ability to evaluate COPC risks using benthic toxicity as a line of evidence. This is particularly important because benthic toxicity is often an important tool for derivation or validation of preliminary remediation goals (PRGs), and so the reliability of this line of evidence requires empirical confirmation.

. Variation due to seasonality and Flushing Tunnel operations – Based on the current projected schedule of the RI, the USEPA has planned a sampling period limited to the

SURFACE SEDIMENT SAMPLING PLAN NATIONAL GRID GOWANUS CANAL SITE BROOKLYN, NEW YORK SEPTEMBER 2010

summer of 2010. Seasonal sampling can address potential seasonal variation in uses and exposure pathways within the Gowanus Canal. For the purposes of this scope, at least three sampling episodes are proposed (i.e., in summer dry, summer wet, and winter). These seasons would be expected to capture both the high temperatures/low dissolved oxygen conditions of the summer and cold temperatures/ low levels of biological activity of the winter. Given that USEPA has already conducted summer season sampling, National Grid’s studies should begin in late fall or early winter, then continue into the 2011 summer season to complete a full annual cycle of sampling. Each sampling episode will include collection of bulk sediment, interstitial water, surface water, and benthic community data with the full suite of analytical, toxicity, and TIE analysis,

. For the Gowanus Canal, an additional temporal change condition is created by the operation or shut down of the Flushing Tunnel. Currently, the Flushing Tunnel is shut down for repair until 2013. Sampling should include periods during the shutdown period and following start up of the retrofitted Flushing Tunnel in order to understand effects on the surface water and sediment quality, and the potential for the Flushing Tunnel to resuspend and redistribute sediments and associated COPCs. Therefore, an additional round of surface sediment sampling is proposed for 2013 to evaluate conditions after the flushing tunnel returns to operation. This sampling event will include collection of bulk sediment, interstitial water, surface water, and benthic community data with the full suite of analytical, toxicity, and TIE analysis,

Proposed Sample Analysis

Parameters to be analyzed should include, but not be limited to the following list (with USEPA analytical method suggestions where appropriate). Prior to initiating sampling, targets for analytical detection limits will be compiled to ensure that method detection limits are low enough to allow for comparison to screening-level risk benchmarks.

. Bulk sediment and associated interstitial water chemistry: o VOCs according to USEPA Method 8260B o SVOCs according to USEPA Method 8270C o PCBs according to USEPA Method 8082A o Pesticides according to USEPA Method 8081A o Herbicides according to USEPA Method 8151A o Target Analyte List (TAL) metals according to USEPA Method 6000/7000 series o SEM/AVS TAL metals (USEPA Method 200 series) o Total cyanide according to USEPA Method 9012 o Total organic carbon (TOC) according to USEPA Method 9060 o Nitrate/nitrite according to USEPA Method 300.0 o Sulfate according to USEPA Method 300.0

SURFACE SEDIMENT SAMPLING PLAN NATIONAL GRID GOWANUS CANAL SITE BROOKLYN, NEW YORK SEPTEMBER 2010

o Pathogen (coliforms, bacteria, viruses) o Biological Oxygen Demand o SPME GC/MS o Sediment TIE/ Toxicity Testing

. Sediment characteristics: o Grain size analysis o Bulk Density o Percent Water Content o pH o Black carbon (According to USEPA 2009, black carbon can have geochemical implications resulting in a higher absorption of PAHs and decreased bioavailability)

. Surface Water: o VOCs according to USEPA Method 8260B o SVOCs according to USEPA Method 8270C o PCBs according to USEPA Method 8082A o Pesticides according to USEPA Method 8081A o Herbicides according to USEPA Method 8151A o TAL metals according to USEPA Method 6000/7000 series o Total cyanide according to USEPA Method 9012 o Nitrate/nitrite according to USEPA Method 300.0 o Sulfate according to USEPA Method 300.0 o Pathogen ( coliforms, bacteria, viruses) o Total Suspended Solids (TSS) o Biological Oxygen Demand o Chemical Oxygen Demand o pH

SURFACE SEDIMENT SAMPLING PLAN NATIONAL GRID GOWANUS CANAL SITE BROOKLYN, NEW YORK SEPTEMBER 2010

References

Carr, RS, J.M. Biedenbach, and R.L. Hooten. 2001. Sediment quality assessment survey and toxicity identification evaluation studies in Lavaca Bay, Texas, a marine superfund site. Environmental Toxicology 16: 20-30.

GEI Consultants, Inc .November 2009a. Remedial Data Gap Identification and Risk Assessment Scope–Gowanus Canal Evaluation. Submitted to: USEPA on behalf of National Grid.

GEI Consultants, Inc. December 2009b. Remedial Investigation Technical Report Gowanus Canal, Brooklyn, New York AOC Index No. A2-0523-0705. Submitted to: National Grid.

Hawthorne, S.B., C.B. Grabanski, D.J. Miller and J.P. Kreitinger. 2005. Solid-Phase Microextraction Measurement of Parent and Alkyl Polycyclic Aromatic Hydrocarbons in Milliliter Sediment Pore Water Samples and Determination of KDOC Values. Environ. Sci. Technol. 39: 2795-2803.

Hunt, J.W., B.S. Anderson, B.M. Phillips, R.S. Tjeerdema, K.M. Taberski, C.J. Wilso, H.M. Puckett, M., R. Stephenson Fairey, and J. Oakden. 2000. A large scale categorization of sites in San Francisco bay, USA, based in the sediment quality triad, toxicity identification evaluations and gradient studies. Environmental Toxicology and Chemistry 20(6):1252-1265.

Mehler, W.T., J.D. Maul, Z. Jing-You, and M.J. Lydy. 2010 Identifying the causes of sediments- associated contamination in the Illinois River (USA) using a whole sediment toxicity identification evaluation. Environmental Toxicology and Chemistry (29):158-167.

Perron, M.M., R. M. Burgess, K.T. Ho, M.C. Pelletier, M.G. Cantwell, and J.P. Shiney. 2010. Bioavailability assessment of contaminated field sediment from Patrick Bayou, Texas, USA: Toxicity identification evaluation and Equilibrium Partitioning. Environmental Toxicology and Chemistry (29): 742-750.

Picone M., M. Bergamina, E. Volpatoa, E. Delaneya, C. Turettab, M. Ranaldoc, G. Capodagliob, and C. Nascia. 2009. Sequential toxicity identification evaluation (TIE) for characterizing toxicity of Venice Lagoon sediments: Comparison of two different approaches. Ecotoxicology and Environmental Safety 72(2):538-545.

SURFACE SEDIMENT SAMPLING PLAN NATIONAL GRID GOWANUS CANAL SITE BROOKLYN, NEW YORK SEPTEMBER 2010

Tracey G.A., S. Poucher; B. Kelley, and P. Crocker. 2004. Application of sediment toxicity identification evaluation in support of total maximum daily load development for the calcasieu estuary. Ecosystem Health & Management, 7(3): 357-368.

Washington State Department of Ecology. 1995. Chapter 173-204 WAC, Sediment management Standards, WA.

Washington State Department of Ecology. 2008. Sediment Sampling and Analysis Plan Appendix. Guidance on the Development of Sediment Sampling and Analysis Plans Meeting the Requirements of the Sediment Management Standards (Chapter 173-204 WAC). Ecology Publication No. 03-09-043, WA.

USEPA. 1994. Sediment Sampling, SOP No.2016, Revision 0.0. Environmental Response Team (ERT). November 17, 1994.

USEPA, 1995. Determination of Background Concentrations of Inorganics in Soils and Sediments at Hazardous Waste Sites. Office of Solid Waste and Emergency and Remedial Response U.S. Environmental Protection Agency Washington, DC EPA 540/S-96/500. December 1995.

USEPA, 2001. Methods for Collecting, Storing, and Manipulating Sediments and Interstitial Water Samples for Chemical and Toxicological Analyses: Technical Manual. EPA-823-B-01- 002. October 2001.

USEPA, 2002. Guidance for Comparing Background and Chemical Concentrations in Soil for CERCLA Sites Office of Emergency and Remedial Response U.S. Environmental Protection Agency Washington, DC EPA 540-R-01-003 OSWER 9285.7-41 September 2002

USEPA, 2003. Procedures for the Derivation of Equilibrium Partitioning Sediment Benchmarks (ESBs) for the Protection of Benthic Organisms: PAH Mixtures. EPA/600/R-02/013 November.

USEPA, 2007. Sediment Toxicity Identification Evaluation (TIE). EPA/600/R-07/080. Office of Research and Development Washington, DC 20460.

USEPA: Burgess, R. M. 2009. Evaluating Ecological Risk to Invertebrate Receptors from in Sediments at Hazardous Waste Sites (Final Report). Ecological Risk Assessment Support Center, Cincinnati, OH, EPA/600/R-06/162F.

USEPA, 2010. Gowanus Canal Draft Final Phase 3 RI Technical Approach and Scope. May 2010.

Table 1 Sample Descriptions and Analytical Summary National Grid Gowanus Canal Brooklyn, NY

Coordinates Analysis (Method1) Physical Sediment Characteristics Ecotoxicological Analysis 5 4 6 Sample Sample 7 Sample I.D. (8270C) (8082A)

Type Location Northing Easting Description Rationale 2 pH 3 TSS TOC BOD COD VOCs (9060) Nitrite Metals (300.0) (300.0) Sulfate Nitrate/ (8081A) (8151A) (8260B) Benthic Benthic Content/ Toxicity % Water Sampling SEM/AVS SEM/AVS Pesticides Herbicides Herbicides Pathogens Grain Size TAL Metals Metals TAL (6000/7000) Invertebrate Bulk Density/ Bulk Free Cyanide PCBs Black Carbon Sediment TIE Sediment & SVOCs NG-GC-SW301-SD Head of canal; thick sediment mound 301 NG-GC-SW301-SW 673636.97 634433.56 CSO (RH-034) from CSO discharges; exposed XXX XX XXXXX XXXX XX NG-GC-SW301-W sediment at low tide NG-GC-SW302-SD 302 NG-GC-SW302-SW 673300.31 634273.62 CSO (RH-038) CSO; spatial coverage XXX X X XXX XX X X XX X X NG-GC-SW302-W NG-GC-SW303-SD Near former MGP site; high surface 303 NG-GC-SW303-SW 673198.13 634233.98 Former Fulton MGP site sediment PAH concentrations for X X X X X XX XXX XXXX XX NG-GC-SW303-W evaluation in BERA NG-GC-SW304-SD 304 NG-GC-SW304-SW 673070.09 634156.56 CSO (RH-037) CSO; spatial coverage XXX X X XX XXX XXXX XX NG-GC-SW304-W NG-GC-SW305-SD 305 NG-GC-SW305-SW 672782.28 633995.68 Union St. bridge crossing Human health exposure point XXX X X X X XX X X X XX XX NG-GC-SW305-W NG-GC-SW306-SD 306 NG-GC-SW306-SW 672597.43 633915.4 CSO (RH-036) CSO; spatial coverage XXX X XXXXX XX XXX XX NG-GC-SW306-W NG-GC-SW307A-SD CSO (OH-005) and Carroll 307A NG-GC-SW307A-SW 672302.69 633815.12 CSO; human health exposure point XXX X X X XXXX X X XX XX St. bridge crossing NG-GC-SW307A-W NG-GC-SW307B-SD Pipe discharge in the canal, 307B NG-GC-SW307D-SW Based on USEPA Locations Based on USEPA Locations Human health exposure point X XXXXXXXXX XXXX XX exposed sediment NG-GC-SW307D-W NG-GC-SW308A-SD Canoe launch -north next to 308A NG-GC-SW308A-SW Based on USEPA Locations Based on USEPA Locations Human health exposure point XXXX X XXXXX XX X X XX steps from exposed sediment NG-GC-SW308A-W NG-GC-SW308B-SD Canoe launch -south section 308B NG-GC-SW308B-SW Based on USEPA Locations Based on USEPA Locations Human health exposure point XXX XX XXXXXXX X X XX from exposed sediment NG-GC-SW308B-W NG-GC-SW309-SD 309NG-GC-SW309-SW 671562.74 633478.87 3rd St. bridge crossing Human health exposure point X XX X XXXXXX XXXX XX NG-GC-SW309-W NG-GC-SW310-SD Potential for exposed sediment at low 310 NG-GC-SW310-SW 670974.98 633786.69 4th Street Basin XXX XX XXXXX X XXX XX tide NG-GC-SW310-W NG-GC-SW311-SD 311 NG-GC-SW311-SW 671417.16 633287.31 CSO (OH-007) CSO; spatial coverage XXXX XXXXXX X X X X XX Surface NG-GC-SW311-W Water NG-GC-SW312-SD CSO; spatial coverage; Upstream of 312NG-GC-SW312-SW 671571.77 632886.87 CSO (RH-035) XXX X X XXXXX XXXXXX CG/PP former MGP site NG-GC-SW312-W NG-GC-SW313-SD 313NG-GC-SW313-SW 671566.97 632297.41 Carroll Gardens/Public Place Former MGP site XXXXXXXXXX XXXX XX NG-GC-SW313-W NG-GC-SW314-SD Potential for exposed sediment at low 314 NG-GC-SW314-SW 671128.04 632928.61 6th St. Basin XXXXXXXXXX XXXX XX tide NG-GC-SW314-W NG-GC-SW315-SD 315 NG-GC-SW315-SW 671285.67 632011.79 Carroll Gardens/Public Place Former MGP site XXX X X X XXXXXXXX XX NG-GC-SW315-W NG-GC-SW316-SD Potential for exposed sediment at low 316NG-GC-SW316-SW 670990.44 632450.87 7th St. Basin XXXXXXXXXX XXXX XX tide NG-GC-SW316-W NG-GC-SW317-SD Storm sewer outfalls (RH-008 317 NG-GC-SW317-SW 670951.79 631864.91 and RH-032) and 9th St. CSO; human health exposure point XXX X XXXXXX X X XX XX NG-GC-SW317-W bridge crossing NG-GC-SW318-SD Former Metropolitan MGP site; 11th St. Basin, former Metro. 318NG-GC-SW318-SW 670344.18 631686.67 Potential for exposed sediment at low XXXXXXXXXX XXXX XX MGP site NG-GC-SW318-W tide NG-GC-SW319-SD Former Metropolitan MGP site; High 319NG-GC-SW319-SW 670310.16 631481.48 Former Metro. MGP site surface sediment PAH concentrations XXX X X X XXXX XXXX XX NG-GC-SW319-W for evaluation in BERA NG-GC-SW320-SD CSO (RH-031) and Hamilton CSO; spatial coverage; Human health 320 NG-GC-SW320-SW 669869.83 631129.57 X XX X XXXXXX XXXX XX Avenue crossing exposure point NG-GC-SW320-W NG-GC-SW321-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 321NG-GC-SW321-SW 669038.58 631033.49 XXX X X X XXXX XXXX XX Expressway Channel NG-GC-SW321-W NG-GC-SW322-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 322NG-GC-SW322-SW 668781.09 630852.22 XXXXXXXXXX XXXX XX Expressway Channel NG-GC-SW322-W NG-GC-SW323-SD 323NG-GC-SW323-SW 668512.32 630633.28 CSO (OH-006) CSO; spatial coverage XXX X X XXXXX X XXX XX NG-GC-SW323-W NG-GC-SW324-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 324 NG-GC-SW324-SW 668978.22 630523.81 XXX X X X XXXX XXXX XX NG-GC-SW324-W Expressway Channel

Page 1 of 5 H:\WPROC\Project\NationalGrid\Gowanus - Confidential\8-10 Sediment Work PLan\FINAL 9-13-2010\SAP - Table 1 Sample Info Table 1 Sample Descriptions and Analytical Summary National Grid Gowanus Canal Brooklyn, NY

Coordinates Analysis (Method1) Physical Sediment Characteristics Ecotoxicological Analysis 5 4 6 Sample Sample 7 Sample I.D. (8270C) (8082A)

Type Location Northing Easting Description Rationale 2 pH 3 TSS TOC BOD COD VOCs (9060) Nitrite Metals (300.0) (300.0) Sulfate Nitrate/ (8081A) (8151A) (8260B) Benthic Benthic Content/ Toxicity % Water Sampling SEM/AVS SEM/AVS Pesticides Herbicides Herbicides Pathogens Grain Size TAL Metals Metals TAL (6000/7000) Invertebrate Bulk Density/ Bulk Free Cyanide PCBs Black Carbon Sediment TIE Sediment & SVOCs NG-GC-SW325-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 325 NG-GC-SW325-SW 668818.18 630216.52 XXXXXXXXXX XXXX XX Expressway Channel NG-GC-SW325-W NG-GC-SW326-SD Surface sediment/surface water 326 NG-GC-SW326-SW To be determined To be determined Reference location XXX X XXXXX XXX X X XX reference location NG-GC-SW326-W NG-GC-SW327-SD Surface sediment/surface water 327NG-GC-SW327-SW To be determined To be determined Reference location XXXXXXXXXX XXXX XX reference location NG-GC-SW327-W NG-GC-SW328-SD Surface sediment/surface water 328 NG-GC-SW328-SW To be determined To be determined Reference location XXXXXXXXXX XXXX XX reference location NG-GC-SW328-W NG-GC-SW329-SD Surface sediment/surface water 329NG-GC-SW329-SW To be determined To be determined Reference location XXX XX XXXX X X XXX XX reference location NG-GC-SW329-W NG-GC-SW330-SD Surface Surface sediment/surface water 330NG-GC-SW330-SW To be determined To be determined Reference location XXX X X X XXXX XXXX X X Water reference location NG-GC-SW330-W NG-GC-SW331-SD Surface sediment/surface water 331NG-GC-SW331-SW To be determined To be determined Reference location XXXXXXXXXX XXXX XX reference location NG-GC-SW331-W NG-GC-SW332-SD Surface sediment/surface water 332 NG-GC-SW332-SW To be determined To be determined Reference location XXX X X X XXXX XXXX XX reference location NG-GC-SW332-W NG-GC-SW333-SD Surface sediment/surface water 333 NG-GC-SW333-SW To be determined To be determined Reference location XXXXXXXXXX XXXX XX reference location NG-GC-SW333-W NG-GC-SW334-SD Surface sediment/surface water 334NG-GC-SW334-SW To be determined To be determined Reference location XXX X X X XXXX XXXX XX reference location NG-GC-SW334-W NG-GC-SW335-SD Surface sediment/surface water 335NG-GC-SW335-SW To be determined To be determined Reference location XXXXXXXXXX XXXX XX reference location NG-GC-SW335-W NG-GC-SD301(0-1)-SD Head of canal; thick sediment mound 301NG-GC-SD301(0-1)-SW 673636.97 634433.56 CSO (RH-034) from CSO discharges; exposed XXX X X X XXXX X X X X XXXX NG-GC-SD301(0-1)-W sediment at low tide NG-GC-SD302(0-1)-SD 302NG-GC-SD302(0-1)-SW 673300.31 634273.62 CSO (RH-038) CSO; spatial coverage X XX X X X XXXX XXX XXXXX NG-GC-SD302(0-1)-W NG-GC-SD303(0-1)-SD Near former MGP site; high surface 303 NG-GC-SD303(0-1)-SW 673198.13 634233.98 Former Fulton MGP site sediment PAH concentrations for XXX X X X XXXX X X X XXXXX NG-GC-SD303(0-1)-W evaluation in BERA NG-GC-SD304(0-1)-SD 304 NG-GC-SD304(0-1)-SW 673070.09 634156.56 CSO (RH-037) CSO; spatial coverage XXX X X X XXXX X X X XXXXX NG-GC-SD304(0-1)-W NG-GC-SD305(0-1)-SD 305 NG-GC-SD305(0-1)-SW 672782.28 633995.68 Union St. bridge crossing Human health exposure point XXX XX XXXXXXX X X XX XX NG-GC-SD305(0-1)-W NG-GC-SD306(0-1)-SD 306 NG-GC-SD306(0-1)-SW 672597.43 633915.4 CSO (RH-036) CSO; spatial coverage XXX X X X XXXX X X X XXXX X NG-GC-SD306(0-1)-W NG-GC-SD307A(0-1)-SD CSO (OH-005) and Carroll Surface 307ANG-GC-SD307A(0-1)-SW 672302.69 633815.12 CSO; human health exposure point XXX X X X XXXX X X X X X X X X St. bridge crossing Sediment NG-GC-SD307A(0-1)-W (Bulk NG-GC-SD307B(0-1)-SD Pipe discharge in the canal, Analytical) 307B NG-GC-SD307B(0-1)-SW Based on USEPA Locations Based on USEPA Locations Human health exposure point XXX X X X X XX XXXX X XXXX exposed sediment NG-GC-SD307B(0-1)-W NG-GC-SD308A(0-1)-SD Canoe launch -north next to 308ANG-GC-SD308A(0-1)-SW Based on USEPA Locations Based on USEPA Locations Human health exposure point XXX X X X XXXX X X X X X X X X steps from exposed sediment NG-GC-SD308A(0-1)-W NG-GC-SD308B(0-1)-SD Canoe launch -south section 308BNG-GC-SD308B(0-1)-SW Based on USEPA Locations Based on USEPA Locations Human health exposure point XXX X X X XXXX X X X X X X X X from exposed sediment NG-GC-SD308B(0-1)-W NG-GC-SD309(0-1)-SD 309NG-GC-SD309(0-1)-SW 671562.74 633478.87 3rd St. bridge crossing Human health exposure point XXX X X X XXXX XX X X X XX X NG-GC-SD309(0-1)-W NG-GC-SD310(0-1)-SD Potential for exposed sediment at low 310NG-GC-SD310(0-1)-SW 670974.98 633786.69 4th Street Basin XXX X X X XXXX X X X X X X X X tide NG-GC-SD310(0-1)-W NG-GC-SD311(0-1)-SD 311NG-GC-SD311(0-1)-SW 671417.16 633287.31 CSO (OH-007) CSO; spatial coverage XXX X X X XXXX X X X XXXXX NG-GC-SD311(0-1)-W NG-GC-SD312(0-1)-SD CSO; spatial coverage; Upstream of 312NG-GC-SD312(0-1)-SW 671571.77 632886.87 CSO (RH-035) XXX X X X XXXX X X X X XXXX CG/PP former MGP site NG-GC-SD312(0-1)-W

Page 2 of 5 H:\WPROC\Project\NationalGrid\Gowanus - Confidential\8-10 Sediment Work PLan\FINAL 9-13-2010\SAP - Table 1 Sample Info Table 1 Sample Descriptions and Analytical Summary National Grid Gowanus Canal Brooklyn, NY

Coordinates Analysis (Method1) Physical Sediment Characteristics Ecotoxicological Analysis 5 4 6 Sample Sample 7 Sample I.D. (8270C) (8082A)

Type Location Northing Easting Description Rationale 2 pH 3 TSS TOC BOD COD VOCs (9060) Nitrite Metals (300.0) (300.0) Sulfate Nitrate/ (8081A) (8151A) (8260B) Benthic Benthic Content/ Toxicity % Water Sampling SEM/AVS SEM/AVS Pesticides Herbicides Herbicides Pathogens Grain Size TAL Metals Metals TAL (6000/7000) Invertebrate Bulk Density/ Bulk Free Cyanide PCBs Black Carbon Sediment TIE Sediment & SVOCs NG-GC-SD313(0-1)-SD 313 NG-GC-SD313(0-1)-SW 671566.97 632297.41 Carroll Gardens/Public Place Former MGP site XXX X X X XXXX X X X XXXXX NG-GC-SD313(0-1)-W NG-GC-SD314(0-1)-SD Potential for exposed sediment at low 314 NG-GC-SD314(0-1)-SW 671128.04 632928.61 6th St. Basin XXX X X X XXXX X X X XXXXX tide NG-GC-SD314(0-1)-W NG-GC-SD315(0-1)-SD 315 NG-GC-SD315(0-1)-SW 671285.67 632011.79 Carroll Gardens/Public Place Former MGP site XXX X X X XXXX X X X XXXX X NG-GC-SD315(0-1)-W NG-GC-SD316(0-1)-SD Potential for exposed sediment at low 316 NG-GC-SD316(0-1)-SW 670990.44 632450.87 7th St. Basin XXX X X X XXXX X X X X XXXX tide NG-GC-SD316(0-1)-W NG-GC-SD317(0-1)-SD Storm sewer outfalls (RH-008 317 NG-GC-SD317(0-1)-SW 670951.79 631864.91 and RH-032) and 9th St. CSO; human health exposure point XXX X X X XXXX X X X XXXXX NG-GC-SD317(0-1)-W bridge crossing NG-GC-SD318(0-1)-SD Former Metropolitan MGP site; 11th St. Basin, former Metro. 318 NG-GC-SD318(0-1)-SW 670344.18 631686.67 Potential for exposed sediment at low XXX X X X XXXX X X X X XXXX MGP site NG-GC-SD318(0-1)-W tide NG-GC-SD319(0-1)-SD Former Metropolitan MGP site; High 319 NG-GC-SD319(0-1)-SW 670310.16 631481.48 Former Metro. MGP site surface sediment PAH concentrations XXX X X X XXXX X X X XXXXX NG-GC-SD319(0-1)-W for evaluation in BERA NG-GC-SD320(0-1)-SD CSO (RH-031) and Hamilton CSO; spatial coverage; Human health 320 NG-GC-SD320(0-1)-SW 669869.83 631129.57 XXX X X X XXXX X X X XXXXX Avenue crossing exposure point NG-GC-SD320(0-1)-W NG-GC-SD321(0-1)-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 321 NG-GC-SD321(0-1)-SW 669038.58 631033.49 XXX X X X XXXX X X X XXXX X Expressway Channel NG-GC-SD321(0-1)-W NG-GC-SD322(0-1)-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 322 NG-GC-SD322(0-1)-SW 668781.09 630852.22 XXX X X X XXXX X X X XXX XX Expressway Channel NG-GC-SD322(0-1)-W NG-GC-SD323(0-1)-SD 323 NG-GC-SD323(0-1)-SW 668512.32 630633.28 CSO (OH-006) CSO; spatial coverage XXX X X X XXXX X X X XXXXX NG-GC-SD323(0-1)-W Surface NG-GC-SD324(0-1)-SD Sediment Downstream of Gowanus Spatial coverage of Gowanus Creek 324 NG-GC-SD324(0-1)-SW 668978.22 630523.81 XXX X X X XXXX X X X X XXXX (Bulk Expressway Channel Analytical) NG-GC-SD324(0-1)-W NG-GC-SD325(0-1)-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 325 NG-GC-SD325(0-1)-SW 668818.18 630216.52 XXX X X X XXXX X X X XXXXX Expressway Channel NG-GC-SD325(0-1)-W NG-GC-SD326(0-1)-SD Surface sediment/surface water 326 NG-GC-SD326(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX X X X XXXXX reference location NG-GC-SD326(0-1)-W NG-GC-SD327(0-1)-SD Surface sediment/surface water 327 NG-GC-SD327(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX X X X XXXX X reference location NG-GC-SD327(0-1)-W NG-GC-SD328(0-1)-SD Surface sediment/surface water 328 NG-GC-SD328(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX X X X XXX XX reference location NG-GC-SD328(0-1)-W NG-GC-SD329(0-1)-SD Surface sediment/surface water 329 NG-GC-SD329(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX XX X XXXXX reference location NG-GC-SD329(0-1)-W NG-GC-SD330(0-1)-SD Surface sediment/surface water 330 NG-GC-SD330(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX X X X X XXXX reference location NG-GC-SD330(0-1)-W NG-GC-SD331(0-1)-SD Surface sediment/surface water 331 NG-GC-SD331(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX X X X XXXXX reference location NG-GC-SD331(0-1)-W NG-GC-SD332(0-1)-SD Surface sediment/surface water 332 NG-GC-SD332(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX X X X XXXXX reference location NG-GC-SD332(0-1)-W NG-GC-SD333(0-1)-SD Surface sediment/surface water 333 NG-GC-SD333(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX X X X XX XX X reference location NG-GC-SD333(0-1)-W NG-GC-SD334(0-1)-SD Surface sediment/surface water 334 NG-GC-SD334(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX X X X XXXXX reference location NG-GC-SD334(0-1)-W NG-GC-SD335(0-1)-SD Surface sediment/surface water 335 NG-GC-SD335(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX XX X XXXXX reference location NG-GC-SD335(0-1)-W NG-GC-PW301(0-1)-SD Head of canal; thick sediment mound 301 NG-GC-PW301(0-1)-SW 673636.97 634433.56 CSO (RH-034) from CSO discharges; exposed XXX XX XXXXXX X X XX NG-GC-PW301(0-1)-W sediment at low tide Surface NG-GC-PW302(0-1)-SD Sediment 302 NG-GC-PW302(0-1)-SW 673300.31 634273.62 CSO (RH-038) CSO; spatial coverage XXX X X X XXXX X X X X X Interstitial NG-GC-PW302(0-1)-W Water NG-GC-PW303(0-1)-SD Near former MGP site; high surface 303 NG-GC-PW303(0-1)-SW 673198.13 634233.98 Former Fulton MGP site sediment PAH concentrations for XXX X X X XXXX X X X XX NG-GC-PW303(0-1)-W evaluation in BERA

Page 3 of 5 H:\WPROC\Project\NationalGrid\Gowanus - Confidential\8-10 Sediment Work PLan\FINAL 9-13-2010\SAP - Table 1 Sample Info Table 1 Sample Descriptions and Analytical Summary National Grid Gowanus Canal Brooklyn, NY

Coordinates Analysis (Method1) Physical Sediment Characteristics Ecotoxicological Analysis 5 4 6 Sample Sample 7 Sample I.D. (8270C) (8082A)

Type Location Northing Easting Description Rationale 2 pH 3 TSS TOC BOD COD VOCs (9060) Nitrite Metals (300.0) (300.0) Sulfate Nitrate/ (8081A) (8151A) (8260B) Benthic Benthic Content/ Toxicity % Water Sampling SEM/AVS SEM/AVS Pesticides Herbicides Herbicides Pathogens Grain Size TAL Metals Metals TAL (6000/7000) Invertebrate Bulk Density/ Bulk Free Cyanide PCBs Black Carbon Sediment TIE Sediment & SVOCs NG-GC-PW304(0-1)-SD 304 NG-GC-PW304(0-1)-SW 673070.09 634156.56 CSO (RH-037) CSO; spatial coverage XXX X X X XXXX X X X XX NG-GC-PW304(0-1)-W NG-GC-PW305(0-1)-SD 305 NG-GC-PW305(0-1)-SW 672782.28 633995.68 Union St. bridge crossing Human health exposure point XXX X X X XXXX X X X XX NG-GC-PW305(0-1)-W NG-GC-PW306(0-1)-SD 306 NG-GC-PW306(0-1)-SW 672597.43 633915.4 CSO (RH-036) CSO; spatial coverage XXX X X X XXXX X X X XX NG-GC-PW306(0-1)-W NG-GC-PW307A(0-1)-SD CSO (OH-005) and Carroll 307A NG-GC-PW307A(0-1)-SW 672302.69 633815.12 CSO; human health exposure point XXX X X X XXXX XX X XX St. bridge crossing NG-GC-PW307A(0-1)-W NG-GC-PW307B(0-1)-SD Pipe discharge in the canal, 307B NG-GC-PW307D(0-1)-SW Based on USEPA Locations Based on USEPA Locations Human health exposure point XXX X X X XXXX X X X XX exposed sediment NG-GC-PW307D(0-1)-W NG-GC-PW308A(0-1)-SD Canoe launch -north next to 308A NG-GC-PW308A(0-1)-SW Based on USEPA Locations Based on USEPA Locations Human health exposure point XXX X X X XXXX X X X XX steps from exposed sediment NG-GC-PW308A(0-1)-W NG-GC-PW308B(0-1)-SD Canoe launch -south section 308B NG-GC-PW308B(0-1)-SW Based on USEPA Locations Based on USEPA Locations Human health exposure point XXX XX XXXXXX X XXX from exposed sediment NG-GC-PW308B(0-1)-W NG-GC-PW309(0-1)-SD 309 NG-GC-PW309(0-1)-SW 671562.74 633478.87 3rd St. bridge crossing Human health exposure point XXX X X X XXXX X X X XX NG-GC-PW309(0-1)-W NG-GC-PW310(0-1)-SD Potential for exposed sediment at low 310 NG-GC-PW310(0-1)-SW 670974.98 633786.69 4th Street Basin XXX X X X XXXX X X X X X tide NG-GC-PW310(0-1)-W NG-GC-PW311(0-1)-SD 311 NG-GC-PW311(0-1)-SW 671417.16 633287.31 CSO (OH-007) CSO; spatial coverage XXX X X X XXXX X X X XX NG-GC-PW311(0-1)-W NG-GC-PW312(0-1)-SD CSO; spatial coverage; Upstream of 312 NG-GC-PW312(0-1)-SW 671571.77 632886.87 CSO (RH-035) XXX X X X XXXX X X X XX CG/PP former MGP site NG-GC-PW312(0-1)-W NG-GC-PW313(0-1)-SD 313 NG-GC-PW313(0-1)-SW 671566.97 632297.41 Carroll Gardens/Public Place Former MGP site XXX X X X XXXX X X X XX NG-GC-PW313(0-1)-W NG-GC-PW314(0-1)-SD Potential for exposed sediment at low Surface 314 NG-GC-PW314(0-1)-SW 671128.04 632928.61 6th St. Basin XXX X X X XXXX X X X X X tide Sediment NG-GC-PW314(0-1)-W Interstitial NG-GC-PW315(0-1)-SD Water 315 NG-GC-PW315(0-1)-SW 671285.67 632011.79 Carroll Gardens/Public Place Former MGP site XXX X X X XXXX X X X XX NG-GC-PW315(0-1)-W NG-GC-PW316(0-1)-SD Potential for exposed sediment at low 316 NG-GC-PW316(0-1)-SW 670990.44 632450.87 7th St. Basin XXX X X X XXXX X X X XX tide NG-GC-PW316(0-1)-W NG-GC-PW317(0-1)-SD Storm sewer outfalls (RH-008 317 NG-GC-PW317(0-1)-SW 670951.79 631864.91 and RH-032) and 9th St. CSO; human health exposure point XXX XX XXXXXX X XXX NG-GC-PW317(0-1)-W bridge crossing NG-GC-PW318(0-1)-SD Former Metropolitan MGP site; 11th St. Basin, former Metro. 318 NG-GC-PW318(0-1)-SW 670344.18 631686.67 Potential for exposed sediment at low XXX X X X XXXX X X X XX MGP site NG-GC-PW318(0-1)-W tide NG-GC-PW319(0-1)-SD Former Metropolitan MGP site; High 319 NG-GC-PW319(0-1)-SW 670310.16 631481.48 Former Metro. MGP site surface sediment PAH concentrations XXX X X X XXXX X X X X X NG-GC-PW319(0-1)-W for evaluation in BERA NG-GC-PW320(0-1)-SD CSO (RH-031) and Hamilton CSO; spatial coverage; Human health 320 NG-GC-PW320(0-1)-SW 669869.83 631129.57 XXX X X X XXXX X X X XX Avenue crossing exposure point NG-GC-PW320(0-1)-W NG-GC-PW321(0-1)-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 321 NG-GC-PW321(0-1)-SW 669038.58 631033.49 XXX XX XXXXXXX X XX Expressway Channel NG-GC-PW321(0-1)-W NG-GC-PW322(0-1)-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 322 NG-GC-PW322(0-1)-SW 668781.09 630852.22 XXX X X X XXXX X X X XX Expressway Channel NG-GC-PW322(0-1)-W NG-GC-PW323(0-1)-SD 323 NG-GC-PW323(0-1)-SW 668512.32 630633.28 CSO (OH-006) CSO; spatial coverage XXX X X X X XX X X X X X X NG-GC-PW323(0-1)-W NG-GC-PW324(0-1)-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 324 NG-GC-PW324(0-1)-SW 668978.22 630523.81 XXX X X X XXXX X X X X X Expressway Channel NG-GC-PW324(0-1)-W NG-GC-PW325(0-1)-SD Downstream of Gowanus Spatial coverage of Gowanus Creek 325 NG-GC-PW325(0-1)-SW 668818.18 630216.52 XXX X X X XXXX X X X X X Expressway Channel NG-GC-PW325(0-1)-W NG-GC-PW326(0-1)-SD Surface sediment/surface water 326 NG-GC-PW326(0-1)-SW To be determined To be determined Reference location XXX X X X XXXXX X X X X reference location NG-GC-PW326(0-1)-W NG-GC-PW327(0-1)-SD Surface sediment/surface water 327 NG-GC-PW327(0-1)-SW To be determined To be determined Reference location XXX X X X XXXX X X X X X NG-GC-PW327(0-1)-W reference location

Page 4 of 5 H:\WPROC\Project\NationalGrid\Gowanus - Confidential\8-10 Sediment Work PLan\FINAL 9-13-2010\SAP - Table 1 Sample Info Table 1 Sample Descriptions and Analytical Summary National Grid Gowanus Canal Brooklyn, NY

Coordinates Analysis (Method1) Physical Sediment Characteristics Ecotoxicological Analysis 5 4 6 Sample Sample 7 Sample I.D. (8270C) (8082A)

Page 5 of 5 H:\WPROC\Project\NationalGrid\Gowanus - Confidential\8-10 Sediment Work PLan\FINAL 9-13-2010\SAP - Table 1 Sample Info

P L

W T T

I S H W 5 T T

C V

I R A

T E 4

L V

L A

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B U 301 T B S

302 E N 303 304

N O R

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N S

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L 3 307A O 307B R 310

R R AND SEDIMENT SURFACE SURFACE WATER SAMPLE WATER SURFACE A B C T S 2010September 1 Figure

308A 308B

T V

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3 B

S Consultants

O T H 311 S 6 Y T 1 W T S X AND SEDIMENT SURFACE SAMPLE LOCATION WATER SURFACE CANAL GOWANUS S T 7 E S S T 7 S C 1 A E T N L T S P G S E 8 S U T O B LEGEND

W 093010-2-1201 Project O S E A T R D R T 1 C P S E G 314 P Y

E T

312 S

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4 X E R K T E T P C S S A 0 S N 1 O T V I S A N T T S T U C N 1 E E T 1 P D S I S T 6 S T O S R R E S P R L O L 2 P 1 T O C 316 R E R T N A S N T S C 3 O T 1 7 S C 1

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T 2 4 T S 1 S 9 8 Y 1 T T XW S S E 4 5 T 1 C PE A T S 2 S 315 O IT PR EX 5 Y B EXW W T T EC S 317 P 1 0 S IT 2 O X R T E P CANAL GOWANUS

S B

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T B

T YORK NEW BROOKLYN, I 318

S AV

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N IL

T O AM

S T H L I

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S H

L PLAN SAMPLING SEDIMENT SURFACE U

N N

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A N

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M L S G SCALE, FEET

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C Y I H E M L H N R E V 0 500 1,000 E A T A A T R R H P N Y A P O T B T R A N p K IL N B B M E TU A SOURCES: 1. YORKOFNEW CITY CITY DEPARTMENT PLANNING, APPLE. THE BYTES OFBIG AND2. FIGURE SURFACE SEDIMENT 1: SURFACE SAMPLE FROM LOCATION, GOWANUS CANAL WATER APPROACH PHASE DOCUMENT, 3 DRAFT FINAL BY US EPA. PREPARED H C J:\Projects\National_Grid\Gowanus\Surface_Sediment_Sampling_Plan\Gowanus_SurfaceSediment-Water.mxd p

Bronx Kill Physical conditions: shallow, little freshwater inflow, non-navigable. Habitat conditions: likely dissimilar based on tidal strait characteristics.

Westchester Creek Physical conditions: Channelized, industrialized, bulkheaded, large CSO inflow. Unkown level of existing industrial impact Habitat conditions appear similar

Coney Island Creek Physical conditions: Channelized and industrialized, bulkheaded. Some CSO inflow, but unknown how much. Habitat conditions: located near moth of estuary, likely marine-dominated conditions.

SOURCE: ORTHOPHOTO © 2009 ESRI, I-CUBED, GEOEYE. HTTP://GOTO.ARCGISONLINE.COM/MAPS/ ESRI_IMAGERY_WORLD_2D SURFACE SEDIMENT SAMPLING PLAN POTENTIAL CANDIDATES 03,500 7,000 14,000 GOWANUS CANAL FOR REFERENCE BROOKLYN, NEW YORK LOCATIONS Consultants SCALE, FEET Project 093010-2-1201 September 2010 Figure 2

J:\Projects\National_Grid\Gowanus\Surface_Sediment_Sampling_Plan\Gowanus_ReferenceLocations.mxd