Amendment 01 - Appendix F HTRW Documentation.pdf

SPRING CREEK NORTH

ECOSYSTEM RESTORATION PROJECT

BROOKLYN & QUEENS, NEW YORK

DESIGN DOCUMENTATION REPORT

APPENDIX F – HTRW DOCUMENTATION

PREPARED FOR:

U.S. ARMY CORPS OF ENGINEERS

NEW YORK DISTRICT

and

NEW YORK CITY PARKS

PREPARED BY:

PRINCETON HYDRO, LLC.

100% DESIGN – NOVEMBER 2023

APPENDIX F - TABLE OF CONTENTS

MMP HTRW SUMMARY TABLES PREPARED BY THE A/E (CURRENT AS OF JULY 2021)

MMP HTRW SUMMARY MAP PREPARED BY THE A/E (CURRENT AS OF JULY 2021)

LETTER FROM USACE NYD TO NYSDEC REGARDING THE PART 260.13(C) EXEMPTION (OCTOBER 29, 2021)

EMAIL RESPONSE FROM NYSDEC TO THE AFOREMENTIONED LETTER (DECEMBER 24, 2021)

Sample SC/SC 1 SC/SC 2 SC/SC 3 SC/SC 5 SC/SC 5 SC/SC 5 SCM 6 SCM 7 SCM 8 SCM 9 SCM 10 Sample Depth (fbgs) 17' 18' 18' 10-12' 14-16' 16-18' 0-6" 0-6" 0-6" 0-6" 0-6" Unrestricted Residential Ecological Resources Groundwater

Acetone 0.3 0.092 ND ND ND ND ND ND ND ND ND 0.05 100 2.2 0.05 2-Butanone 0.2 ND ND ND ND ND ND ND ND ND ND - 100* - 0.3*

All units in mg/kg

ND- analyzed for but not detected

Italicized- concentration detected at a value below the Reporting Limit

Soil Cleanup Objectives values marked with an asterisk (*) denote CP-51 values

Bold values indicate exceedance of Unrestricted standard

Cells highlighted in yellow indicate a value that exceeds the Residential and/or Groundwater standard

Soil Cleanup Objectives Table 1: August 2002 VOC

Sample Depth (fbgs) 17' 18' 18' 10-12' 14-16' 16-18' 0-6" 0-6" 0-6" 0-6" 0-6" Unrestricted Residential Ecological Resources Groundwater 2-Methylnapthalene ND ND ND ND ND ND ND 1.6 1.8 ND ND - 0.41* - 36.4*

4-Methylphenol 1.8 ND ND ND ND ND ND ND ND ND ND - - - - Acenaphthene ND ND ND ND ND ND 1.1 5.3 4.0 0.19 ND 20 100 20 98

Acenaphthylene ND ND ND ND ND ND 1.2 2.1 2.3 0.11 0.20 100 100 NS 107 Anthracene ND ND ND ND ND ND 3.6 14 13 0.56 0.59 100 100 NS 1000

Benzo[a]anthracene ND ND ND 0.20 ND ND 8.1 41 37 1.2 1.6 1 1 NS 1 Benzo[a]pyrene ND ND ND 0.23 ND ND 8.5 45 40 1.3 1.5 1 1 2.6 22

Benzo(b]fluoranthene ND ND ND 0.34 ND ND 8.3 41 38 1.6 2 1 1 NS 1.7 Benzo[g,h,i]perylene ND ND ND ND ND ND 4.4 22 21 0.82 0.85 100 100 NS 1000 Benzo(k)fluoranthene ND ND ND ND ND ND 3.7 9.1 13 0.67 0.70 0.8 1 NS 1.7

Bis(2-ethylhexyl)phthalate 3.3 ND ND 0.30 0.56 ND ND ND ND 0.42 0.20 - 50* 239* 435* Chrysene ND ND ND 0.24 ND ND 9.1 47 42 1.3 1.7 1 1 NS 1

Dibenzofuran ND ND ND ND ND ND ND ND ND 0.11 ND 7 14 NS 210 (6.2*) Dibenz[a,h]anthracene ND ND ND ND ND ND 1.2 6.2 0.7 0.21 0.25 0.33 0.33 NS 1000

Diethylphthalate ND ND ND ND ND ND ND ND ND 0.12 ND - 100* 100* 7.1* Di-n-butylphthalate ND 0.28 ND 0.38 0.43 0.48 ND ND ND ND 0.28 - 100* 0.014* 8.1*

Fluoranthene ND ND ND 0.31 ND ND 13 61 55 ND 3.8 100 100 NS 1000 Fluorene ND ND ND ND ND ND 1.6 5.0 4.2 0.19 0.12 30 100 30 386 lndeno (1,2,3-cd)pyrene ND ND ND ND ND ND 3.5 18 16 0.68 0.78 0.5 0.5 NS 8.2 Naphthalene ND ND ND ND ND ND ND 1.4 1.6 0.20 ND 12 100 NS 12 Phenanthrene ND ND ND ND ND ND 12 44 38 2.1 2.5 100 100 NS 1000

Phenol 6.9 ND ND ND ND ND ND ND ND ND ND 0.33 100 30 0.33 Pyrene ND ND ND 0.32 ND ND 19 95 82 ND 3.0 100 100 NS 1000

All units in mg/kg

ND- analyzed for but not detected

NS - Protection of ecological resources SCOs were not developed for contaminants identified in Table 375-6.8(b)

Italicized- concentration detected at a value below the Reporting Limit

Soil Cleanup Objectives values marked with an asterisk (*) denote CP-51 values

Bold values indicate exceedance of Unrestricted standard

Red values indicate exceedance of Protection of Ecological Resources standard

Cells highlighted in yellow indicate a value that exceeds the Residential and/or Groundwater standard

Table 2: August 2002 SVOC

Sample Depth (fbgs) 17' 18' 18' 10-12' 14-16' 16-18' 0-6" 0-6" 0-6" 0-6" 0-6" Unrestricted Residential Ecological Resources Groundwater

Arsenic 18.6 3.44 ND 67 3.75 0.836 3.57 3.97 4.96 11.5 30.6 13 16 13 16 Barium 143 20.7 9.56 2420 47.5 58.8 76.8 49.9 112 453 1410 350 350 433 820

Cadmium 4.01 0.66 0.275 21.3 0.485 0.604 0.194 0.446 1.4 4.72 17.3 2.5 2.5 4 7.5 Chromium1 44.4 18.1 8.6 150 28.6 11 14.3 16.1 25.2 69.3 223 1 22 1 19

Lead 612 52.9 12.9 6660 42.4 63.3 133 121 234 795 1130 63 400 63 450 Mercury ND ND ND 3.83 0.189 ND 1.91 0.452 0.840 3 0.539 0.18 0.81 0.18 0.73 Selenium 1.63 1.63 1.19 3.3 3.16 1.24 ND ND 0.898 1.47 19.6 3.9 36 3.9 4

All units in mg/kg

ND- analyzed for but not detected

Italicized- concentration detected at a value below the Reporting Limit

Bold values indicate exceedance of Unrestricted standard

Red values indicate exceedance of Protection of Ecological Resources standard

Cells highlighted in yellow indicate a value that exceeds the Residential and/or Groundwater standard 1 Samples analyzed for total chromium; soil cleanup objective values are for hexavalent chromium

Table 3: August 2002 Metals

Sample SC/SC 5 SCM 9 SCM 10 Sample Depth 10-12' 0-6" 0-6"

Lead 0.429 0.555 0.036 5.000 All units in mg/kg ND- analyzed for but not detected Italicized- concentration detected at a value below the Reporting Limit 1 Toxicity Characteristic Leaching Procedure Regulatory Level

Cells highlighted in yellow indicate a value that exceeds the TCLP Regulatory Level

Table 4: December 2002 TCLP for Lead

NYSDEC TCLP1

Sample SCII-B1 SCII-B2A SCII-B3 SCII-B5 SCII-B7 SCII-B8 SCII-B9 Sample Depth (fbgs) 19.5' 19.5' 19' 19' 19' 19' 19' Unrestricted Residential Ecological Resources Groundwater 4-Methylphenol 0.73 ND ND ND 1.3 1.5 ND - - - - Acenaphthene 0.19 ND ND ND ND ND ND 20 100 20 98 Anthracene 0.91 ND ND ND ND ND 0.21 100 100 NS 1000 Benzo[a]anthracene 1.5 ND 0.21 0.34 ND ND 0.83 1 1 NS 1 Benzo[a]pyrene 1.1 ND 0.22 0.3 ND ND 0.69 1 1 2.6 22 Benzo[b]lfluoranthene 1.7 ND 0.27 0.33 ND ND 0.9 1 1 NS 1.7 Benzo[g,h,i]perylene 0.51 ND ND ND ND ND 0.38 100 100 NS 1000 Benzo[k]fluoranthene 0.51 ND ND 0.26 ND ND 0.41 0.8 1 NS 1.7 Benzoic acid ND I.I ND ND ND 0.55 ND - 100* - 2.7* bis(2-Ethylhexyl)phthalate 0.84 ND ND 0.51 ND ND ND - 50* 239* 435* Butylbenzylphthalate 0.31 ND ND ND ND ND ND - 100* - 122* Chrysene 1.6 ND 0.28 0.6 ND ND 0.93 1 1 NS 1 Dibenzofuran 0.18 ND ND ND ND ND ND 7 14 NS 210 (6.2*) Di-n-butylphthalate ND 1.6 ND ND 0.81 ND 0.21 - 100* 0.014 8.1* Fluoranthene 3.8 ND 0.5 1.2 ND 0.43 2.1 100 100 NS 1000 Fluorene 0.39 ND ND ND ND ND ND 30 100 30 386 Indeno[1,2,3-cd]pyrene 0.69 ND ND ND ND ND 0.45 0.5 0.5 NS 8.2 Naphthalene 0.16 ND 0.34 0.3 ND ND ND 12 100 NS 12 Phenanthrene 3.5 ND 0.21 0.78 ND ND 0.49 100 100 NS 1000 Pyrene 2.9 0.34 0.52 1.1 ND 0.38 1.8 100 100 NS 1000 All units in mg/kg

ND- analyzed for but not detected

NS - Protection of ecological resources SCOs were not developed for contaminants identified in Table 375-6.8(b)

Italicized- concentration detected at a value below the Reporting Limit

Underlined-parameter identified in field blank

Soil Cleanup Objectives values marked with an asterisk (*) denote CP-51 values

Bold values indicate exceedance of Unrestricted standard

Red values indicate exceedance of Protection of Ecological Resources standard

Cells highlighted in yellow indicate a value that exceeds the Residential and/or Groundwater standard

Table 5: April 2003 SVOC

Sample Depth (fbgs) 19.5' 19.5' 19' 19' 19' 19' 19' Unrestricted Residential Ecological Resources Groundwater Alpha-BHC 0.024 ND ND ND ND ND ND 0.02 0.097 0.04 0.02 Beta-BHC 0.012 ND ND ND ND ND ND 0.036 0.072 0.6 0.09 Gamma-Chlordane 0.00071 ND ND ND ND ND ND - 0.54* - 14*

4,4'-DDE 0.0037 ND ND ND ND ND ND 0.0033 1.8 0.0033 17

4,4'-DDT 0.01 ND ND ND ND ND ND 0.0033 1.7 0.0033 136

Alpha-Chlordane 0.0022 ND ND ND ND ND ND 0.094 0.91 1.3 2.9

All units in mg/kg

ND- analyzed for but not detected

Italicized- concentration detected at a value below the Reporting Limit

Soil Cleanup Objectives values marked with an asterisk (*) denote CP-51 values

Bold values indicate exceedance of Unrestricted standard

Red values indicate exceedance of Protection of Ecological Resources standard

Cells highlighted in yellow indicate a value that exceeds the Residential and/or Groundwater standard

Table 6: April 2003 Pesticides/PCBs

Sample Depth (fbgs) 19.5' 19.5' 19' 19' 19' 19' 19' Unrestricted Residential Ecological Resources Groundwater

Arsenic 13 10.5 12 39.5 84.2 56.9 6.29 13 16 13 16 Barium 459 56.7 560 730 6200 915 451 350 350 433 820

Cadmium 3.39 1.77 3.11 2.97 11.1 15.5 1.45 2.5 2.5 4 7.5 Chromium1 34.5 30.2 39.8 28.6 94.2 106 15.8 1 22 1 19

Lead 730 38.1 1605 2795 3225 7100 1520 63 400 63 450 Mercury 1.07 0.24 0.42 0.87 0.27 0.29 0.73 0.18 0.81 0.18 0.73

Silver 1.7 ND ND ND ND ND ND 2 36 2 8.3 All units in mg/kg ND- analyzed for but not detected Italicized- concentration detected at a value below the Reporting Limit Bold values indicate exceedance of Unrestricted standard Red values indicate exceedance of Protection of Ecological Resources standard Cells highlighted in yellow indicate a value that exceeds the Residential and/or Groundwater standard 1 Samples analyzed for total chromium; soil cleanup objective values are for hexavalent chromium

Table 7: April 2003 Metals

Sample SCMA 1-1, 1-2 SCMA 2-2, 2-3 SCMA 3-1, 3-2, 3-3 SCMA 4-1, 4-2 SCMA 5-2 SCMA 6-1 Sample Depth (fbgs) 13-15' 20-22' 22-24' 21-23' 18-20' 24-26'

Arsenic ND 0.022 0.018 0.019 0.009 0.020 5.0 Barium 0.198 0.0765 0.0962 0.0621 0.479 0.509 100 Cadmium 0.0031 ND ND 0.0019 0.0057 0.0047 1.0 Chromium 0.0463 0.0930 0.0046 0.0104 0.0099 0.0109 5.0 Lead 0.014 0.015 0.009 0.008 0.316 0.29 5.0 Selenium 0.028 0.015 0.028 0.032 0.046 0.04 1.0 Silver 0.002 0.002 0.006 0.007 0.015 0.012 5.0 Mercury ND ND ND ND ND ND 0.2 All units in mg/kg ND- analyzed for but not detected Italicized- concentration detected at a value below the Reporting Limit 1 Toxicity Characteristic Leaching Procedure Regulatory Level

Cells highlighted in yellow indicate a value that exceeds the TCLP Regulatory Level

NYSDEC

TCLP1

Table 8: May 2003 TCLP for Metals

Sample N47714-11 N47714-14 N47714-15 N47714-17 Sample Depth (fbgs) 6'-8' 10'-12' 6'-8' 10'-12' Unrestricted Residential Ecological Resources Groundwater bis(2-Ethylhexyl)phthalate 431 ND ND 545 - 50* 239* 435* Fluoranthene 27.4 ND ND ND 100 100 NS 1000 Phenanthrene 24.6 ND ND ND 100 100 NS 1000 Pyrene 32.8 ND ND 234 100 100 NS 1000 1,2,4-Trichlorobenzene ND ND ND ND - - 20* 3.4* All units in mg/kg

ND- analyzed for but not detected

NS - Protection of ecological resources SCOs were not developed for contaminants identified in Table 375-6.8(b)

Italicized- concentration detected at a value below the Reporting Limit

Soil Cleanup Objectives values marked with an asterisk (*) denote CP-51 values

Bold values indicate exceedance of Unrestricted standard.

Cells highlighted in yellow indicate a value that exceeds the Residential and/or Groundwater standard

Table 9: September 2003 Placement Site SVOC

Sample N47714-11 N47714-12 N477414-13 N47714-14 N47714-15 N47714-16 N47714-17 N47714-18 Sample Depth (fbgs) 6'-8' 4'-6' 5'-7' 10'-12' 6'-8' 4'-6' 10'-12' 14'-16' Unrestricted Residential Ecological Resources Groundwater

Arsenic 15.0 9.6 24.4 29.6 24.5 17.7 6.9 6.4 13 16 13 16 Barium 873 665 991 3420 620 697 149 307 350 350 433 820

Cadmium 3.7 3.1 1.5 1.8 3.9 2.7 0.84 <0.78 2.5 2.5 4 7.5 Chromium1 52.4 34.1 58.2 48.9 99.2 60.5 23.7 12.3 1 22 1 19

Lead 655 1830 943 1120 1700 990.0 1400 538 63 400 63 450 Mercury 0.08 <0.036 <0.040 0.14 0.65 0.1 0.034 0.054 0.18 0.81 0.18 0.73 Selenium <1.3 <1.3 3.9 <2.7 <4.2 1.2 <1.1 <1.6 3.9 36 3.9 4

Silver 2 2.1 3.5 4.5 2 1.6 <1.1 <1.6 2 36 2 8.3 All units in mg/kg

ND- analyzed for but not detected

Italicized- concentration detected at a value below the Reporting Limit

Bold values indicate exceedance of Unrestricted standard

Red values indicate exceedance of Protection of Ecological Resources standard

Cells highlighted in yellow indicate a value that exceeds the Residential and/or Groundwater standard 1 Samples analyzed for total chromium; soil cleanup objective values are for hexavalent chromium

Table 10: September 2003 Placement Site Metals

Sample

SCM-10-1

(Center)

SCM-10-2

(East)

SCM-10-3

(South)

SCM-10-4

(West)

SCM-10-5

(North)

SCM-5-1

(Center)

SCM-5-2

(East)

SCM-5-3

(South)

SCM-5-4

(West)

SCM-5-5

(North)

Sample Depth (fbgs) 6'-8' 6'-8' 6'-8' 6'-8' 6'-8' 6'-8' 6'-8' 6'-8' 6'-8' 6'-8' Unrestricted Residential Ecological Resources Groundwater Arsenic 44.3 17.2 40.6 37.5 5.5 32.5 37.1 23.9 21.7 37.4 13 16 13 16 Barium 424 631 2,070 271 <79 679 581 2,370 1,710 880 350 350 433 820 Cadmium <0.62 <0,79 2.6 3.4 5.4 27.1 2.2 30.2 <0.89 5.6 2.5 2.5 4 7.5 Chromium1 37.6 60 173 80.8 14.9 101 108 193 54.8 78 1 22 1 19 Lead 848 680 1,100 554 496 574 3,550 849 2,050 1,300 63 400 63 450 Mercury 0.84 0.48 0.91 1.9 1.3 2.2 1.5 1.7 2.6 2.8 0.18 0.81 0.18 0.73 Selenium 3.8 5.2 3.7 <2.4 <3.9 5.5 9.9 7.1 5.4 9.3 3.9 36 3.9 4 Silver 2.8 3 42 3 <3.9 2.8 170 1.9 3.5 4.9 2 36 2 8.3 All units in mg/kg ND- analyzed for but not detected Italicized- concentration detected at a value below the Reporting Limit Bold values indicate exceedance of Unrestricted standard Red values indicate exceedance of Protection of Ecological Resources standard Cells highlighted in yellow indicate a value that exceeds the Residential and/or Groundwater standard 1 Samples analyzed for total chromium; soil cleanup objective values are for hexavalent chromium

Table 11: September 2003 Cut Site Metals

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SCII -B3

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SCII -B1

SCII -B2

SC/SC1

SC/SC2

SC/SC3

SC/SC5

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SCM 7

SCM 8

SCM 9

SCM 10

N47714-11

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N47714-14

N47714-15

N47714-16

N47714-17

N47714-18

SCM-10*

SCM-5*

Area G

Area F

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Area E Marsh

Area A

Area B Upland

Area C

Area D

Area B Marsh

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BELT

PARKWAY

NOTES:

1. Plan areas are approximate.

2. HTRW sampling locations were obtained from the Spring Creek North Ecosystem Restoration HTRW Analysis Report, and are approximate. Locations were included for sites that showed exceedances of Part 375-6.8(a) levels.

3. Orthoimagery obtained from Esri.

Map Projection: NAD 1983 StatePlane New York Long Island FIPS 3104 Feet

PART 375-6.8(a) UNRESTRICTED USE EXCEEDANCES

SUMMARY MAP

SPRING CREEK NORTH

ECOSYSTEM RESTORATION PROJECT

BOROUGHS OF BROOKLYN & QUEENS NEW YORK CITY, NEW YORK

0 150 300

Feet

Legend HTRW Sampling Location

August, 2002 April, 2003 September, Plan Area Cut/Minor Recontouring Fill

* September 2003 SCM-5 and SCM-10 sampling locations consisted of 5 samples located at 5 ft intervals: SCM-5-1, SCM-5-2, SCM-5-3, SCM-5-4, SCM-5-5; and SCM-10-1, SCM-10-2, SCM-10-3, SCM-10-4, SCM-10-5. All samples exceeded the screening criteria.

DEPARTMENT OF THE ARMY

U.S. ARMY CORPS OF ENGINEERS, NEW YORK DISTRICT

JACOB K. JAVITS FEDERAL BUILDING

26 FEDERAL PLAZA

NEW YORK NEW YORK 10278-0090

Environmental Analysis Branch October 29, 2021

Mr. Ken Brezner Materials Management Engineer New York State Department of Environmental Conservation – Region 2 1 Hunter’s Point Plaza 47-40 21st Street Long Island City, New York 11101-5401

Re: Spring Creek North Ecosystem Restoration Project

Dear Mr. Brezner:

The United States Army Corps of Engineers (USACE), New York District (District) is providing summary documentation supporting the Spring Creek North Ecosystem Restoration Project is “exempt by regulation” from CRR-NY – Title 6- Part

360.13 (Special requirements for pre-determined beneficial use of fill material). Part 360.13(c) reads:

”Exemption for on-site reuse of fill material. Fill material used as backfill for the excavation from which the material was taken, or as fill in areas of similar physical characteristics on the project property is exempt from regulation under this Part. If fill material exhibits historical or visual evidence of contamination (including odors) and will be used in an area with public access, the relocated fill material must be covered with a minimum of 12 inches of soil or fill material that meets the criteria for general fill, as defined in this Part. This provision does not apply to sites which are subject to a department-approved or undertaken program pursuant to Part 375 of this Title.”

The summary below provides a project overview and justification for this exemption in response to your guidance provided to Ms. Lisa Baron (Project Manager) on August 25, 2021.

Project Overview

The District and the New York City Department of Parks and Recreation (NYC

Parks; non-federal sponsor), completed a Feasibility Study to restore Spring Creek North, Brooklyn and Queens, NY through the Corps’ Continuing Authorities Program (CAP) Section 1135. The Final Integrated Feasibility Report and Environmental Assessment was completed in April 2018 and can be found on the District’s website at https://www.nan.usace.army.mil/Spring-Creek-Park/. In August 2018, the District and NYC Parks executed a Project Partnership Agreement to design and implement the restoration of the project. Since that time, field investigations have been completed, and https://www.nan.usace.army.mil/Spring-Creek-Park/

-2-the feasibility-level designs are advancing to 100% Plans and Specifications for construction planned for early 2023.

The project overview below is reproduced from the Feasibility Study, with minor updates to site/habitat acreages to reflect progressed design efforts:

The Spring Creek North project area is a 47-acre portion of Spring Creek Park located adjacent to the banks of Spring Creek and Ralph’s Creek. The Site has been identified as Spring Creek “North” to prevent confusion with the adjacent “Spring Creek South” project on the eastern side of the Belt Parkway. Ralph’s Creek is a tributary to Spring Creek, which in turn is a tributary to the Mill Creek Basin, which empties into Jamaica Bay. The entire site lies within the Jamaica Bay Watershed. The overall Study Area encompasses all of Spring Creek Park and the northeastern portion of Jamaica Bay.

Historically, the creek was part of a tidal wetland draining into Jamaica Bay.

Anthropogenic activities have degraded the wetland over time. Over the past century, the salt marsh community at Spring Creek has been altered by dredging and filling activities, such as the construction and maintenance of the Jamaica Bay federal navigation channel and illegal dumping of the remaining tracts of wetland acreage.

Municipal waste was placed in some areas approximately forty-five years ago.

Demolition debris has also been disposed of in the area of the creek.

The goal of this project is to contribute to the National Ecosystem Restoration by restoring degraded ecosystem structure, function, and dynamic processes to less degraded and more natural conditions. This goal would be accomplished by excavating and re-contouring uplands to intertidal elevations, removing invasive plant species, and replanting with native plant species. The overall project purpose is to improve the environmental quality (water, diversity and wildlife habitat) of Spring Creek and its associated salt marshes as part of the overall Jamaica Bay Ecosystem.

The recommended action would involve the restoration of 47.3 acres of coastal habitats including up to 18.3 acres of salt marsh (10.6 acres of low marsh, 3.9 acres of low-high marsh transition zone, 4.0 acres of high marsh), 4.1 acres of maritime scrub shrub, and about 24.9 acres of maritime upland habitat. The project involves the excavation of historic fill, removal of invasive plant species; re-grading the site to appropriate elevations for the target community; placing a minimum 12-inches of clean soil/growing medium; and planting with native coastal plant species.

The current progressed design is included as Exhibit A. The restoration plan is being designed to be balanced from an earthwork perspective resulting in the beneficial reuse of all material on-site. The general site plan includes material excavation from the proposed marsh restoration areas and relocation and reuse on-site within the upland

-3-habitat restoration areas. All areas that will be excavated and areas of on-site placement of historic fill will be capped with 12 inches of clean growing media/soil (which will meet the criteria for general fill pursuant to Part 360).

Justification for Exemption

A series of geotechnical and Hazardous, Toxic and Radioactive Waste (HTRW) sampling efforts were conducted during the feasibility study. A total of 51 boring samples were collected during five (5) sampling events in 2002 and 2003 and were analyzed for Volatile Organic Compounds (VOCs), Semi-volatile Organic Compounds (SVOCs), pesticides/PCBs, Resource Conservation and Recovery Act (RCRA) metals with a sub-set (9 samples) analyzed for Toxicity Characteristic Leaching Procedure (TCLP) analysis. The historic data indicated that the soils planned for excavation as part of the project were not identified as hazardous waste (per TCLP Analysis). Further, radionuclides are not expected on the site (north of the Belt Parkway) given the disposal history of dredged material placement and timing of placement of municipal waste. In addition, Phase I environmental site assessments completed for parcels within the project area did not reveal any evidence supporting the presence of radionuclides at Spring Creek North- west of the Belt Parkway.

In summary, this exemption is based on the following factors:

• The soil planned to be excavated in the wetland restoration area is NOT considered hazardous waste and will be beneficially used on-site in upland areas of similar physical characteristics on the project property;

• The relocated fill material will be covered with 12-inches of clean growing media/soil (meeting the general fill criteria as defined in Part 360); and

• This activity is not subject to Part 375.

The District will continue to coordinate with Region’s Division of Environmental Permits and Natural Resources staff to obtain the activity’s Water Quality Certificate as the permitting process progresses. If you have any questions, please feel free to contact Lisa Baron at 646-385-1429 or myself at 917-620-2862

Sincerely, Peter Weppler, Chief, Environmental Analysis Branch

EXHIBIT A

Proposed Restoration Plan for Spring Creek North Ecosystem Restoration Project

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