June 13, 2012 Mr. Hank Willems New York State Department Of

Thomas J. Campbell Project Manager Site Investigation and Remediation

June 13, 2012

Mr. Hank Willems New York State Department of Environmental Conservation MGP Remedial Section, Division of Environmental Remediation Bureau of Western Remedial Action, 11th Floor 625 Broadway Albany, New York 12233-7017

Re: Remedial Investigation Work Plan: Phase 1, Final Submittal Greenpoint Energy Center Former Manufactured Gas Plant 287 Maspeth Ave Brooklyn, New York Site No. 224052

Dear Mr. Willems:

National Grid is submitting for your files the approved Phase 1 Remedial Investigation Work Plan for the Greenpoint Energy Center Former Manufactured Gas Plant, located at 287 Maspeth Avenue, Brooklyn, New York. As noted in your correspondence of May 25, 2012, this work plan has been approved by the New York State Department of Environmental Conservation.

Boring locations utility clearing will begin the week of June 18, 2012 and boring activities will begin the week of June 25, 2012.

If you have any questions or require additional information, please feel free to contact me at 516- 545-2555 or by e-mail at [email protected].

Sincerely,

for Thomas J. Campbell Project Manager

MZ/jp H:\WPROC\Project\NationalGrid\Greenpoint\WORK PLANS\REMEDIAL INVESTIGATION\Phase 1\2012-06-05 FINAL_DEC\Greenpoint RIWP Cover Letter 061312.docx

Attachment: Appendices CD

cc: w/attachment D. Hetrick (NYSDOH)

175 Old Country Rd, Hicksville, NY T: 516.545.2555 ■ ■ [email protected] ■ www.nationalgrid.com

Remedial Investigation Work Plan: Phase 1, Final Submittal Greenpoint Energy Center Former Manufactured Gas Plant June 13, 2012 Page 2

ec: w/o attachment G. Cross (NYSDEC – Albany) N. Barber (NYSDEC– Albany) V. Lannon (NYSDEC- Region 2) M. Ryan (NYSDEC- Albany) T. Bell (National Grid) A. Hecht (National Grid) T. Leissing (National Grid) C. Willard (National Grid) M. Stepanova (GEI Consultants) M. Zukauskas (GEI Consultants)

Old Country Rd, Hicksville, NY T: 516.545.2555 ■ ■ [email protected] ■ www.nationalgrid.com

Geotechnical Environmental Water Resources Ecological

Remedial Investigation Work Plan Greenpoint Energy Center Former Manufactured Gas Plant Site

287 Maspeth Avenue Brooklyn, New York 11211 ACO Index No. A2-0552-0606 Site #224052

Submitted to: National Grid 175 East Old Country Road Hicksville, NY 11801

Submitted by: GEI Consultants, Inc 1 Greenwood Ave, Suite 210 Montclair, NJ 07042

June 12, 2012 Project #093260

Michael D. Zukauskas, P.E. Project Manager

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Table of Contents

Table of Contents ii

Abbreviations and Acronyms iv

1. Introduction 1

2. Site Background 3 2.1 Site Description 3 2.2 Site History 5 2.3 Areas of Interest 7 2.4 Local Environment 9 2.4.1 Site Geology 9 2.4.2 Site Hydrogeology 11 2.5 Supplemental Document Review 12 2.5.1 Environmental Records Information Summary 12 2.5.2 Previous Investigations 13

3. Scope of Work 29 3.1 Field Investigation Preparation and Mobilization Activities 30 3.1.1 Site Security, Field Operations Center 30 3.1.2 Establish Decontamination Area 30 3.1.3 Establish a Waste Storage Area 30 3.1.4 Identify Sample Locations and Underground Utilities 31 3.2 Field Investigation Activities 31 3.2.1 Utility Clearance 31 3.2.2 Surface Soil Sampling 32 3.2.3 Test Pit Excavation and Soil Sampling 33 3.2.4 Soil Borings Advancement and Soil Sampling 34 3.2.5 Monitoring Well Installation 36 3.2.6 Monitoring Well Development 37 3.2.7 Groundwater Sampling 37 3.2.8 Hydraulic Conductivity Test 38 3.2.9 NAPL Assessment 38 3.2.10 Soil Vapor Intrusion Investigation 39 3.2.11 Community and Work Zone Air Monitoring 40 3.2.12 Decontamination and Management of Investigation-Derived Waste 41 3.2.13 Survey of Sampling Points 41 3.3 Step I Fish and Wildlife Impact Analysis 42 3.4 Qualitative Human Health Risk Assessment 42 3.5 Quality Assurance/Quality Control and Data Validation 43

4. RI Report Preparation 44

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

5. Schedule 45

6. Project Team 46

7. References 47

Tables

1 Proposed Sample Descriptions, Rationale and Analysis

Figures

1 Site Location Map 2 Sensitive Areas Within ½ Mile of Greenpoint Energy Center

Plates

1 Site Plan with Historical Operations Features 2 Previous Site Investigation Locations 3 Phase 1 Proposed Remedial Investigation Locations

Appendices A-G on CD (included in pouch)

A Historical Investigations B Site-Related Records C Quality Assurance Project Plan D Health and Safety Plan E Field Sampling Plan F Community Air Monitoring Program G Project Organization Chart

MZ/jp H:\WPROC\Project\NationalGrid\Greenpoint\WORK PLANS\REMEDIAL INVESTIGATION\Phase 1\2012-06-05 FINAL_DEC\Greenpoint RI Work Plan 06112012_final.docx

iii

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Abbreviations and Acronyms

ASTM American Society for Testing and Materials AWQS Ambient Water Quality Standards bgs Below ground surface bml Below mud line BUG Brooklyn Union Gas BTU British Thermal Unit CAMP Community Air Monitoring Program cf/d Cubic feet per day CGI Combustible Gas Indicator DER-10 NYSDEC DER-10 Technical Guidance for Site Investigation and Remediation CLP Contract Laboratory Program COCs Chain Of Custody COPCs Contaminants of Potential Concern DNAPL Dense Non-Aqueous Phase Liquid DRO Diesel Range Organic DUSRs Data Usability Summary Report EDR Environmental Data Resources EEA EEA, Inc. ELAP Environmental Laboratory Accreditation Program ERM Effects-Range Median Screening Level ESI Environmental Subsurface Investigation FP&M Fanning, Phillips & Molnar FSP Field Sampling Plan ft Foot or feet ft bgs Feet below ground surface ft bml Feet below mud line FWIA Fish and Wildlife Impact Analysis GEI GEI Consultants, Inc. GFE Gannett Fleming Engineers, P.C. GTI Groundwater Technology, Inc. HASP Health and Safety Plan HDPE High Density Polyethylene HHRA Human Health Risk Assessment IDW Investigation Derived Waste

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Abbreviations and Acronyms (continued)

IRM Interim Remedial Action LNAPL Light non-aqueous phase liquid LNG Liquefied Natural Gas LP Liquid Petroleum MGP Manufactured Gas Plant mg/kg Milligrams per Kilogram MS/MSD Matrix Spike/Matrix Spike Duplicate NAPL Non-aqueous Phase Liquid NAD 83 North American Datum 1983 NAVD 88 North American Vertical Datum 1988 NTU Nephelometric Turbidity Units NYSDEC New York State Department of Environmental Conservation OM&M Operations Monitoring & Maintenance Plan PAH Polycyclic Aromatic Hydrocarbon PCB Polychlorinated Biphenyl PCE Tetrachloroethene PDI Pre-Design Investigation PID Photoionization Detector ppm Parts per Million PS&S Paulus Sokolowski and Sartor Engineering, P.C. PVC Polyvinyl Chloride QAPP Quality Assurance Project Plan QA/QC Quality Assurance and Quality Control RCRA Resource Conservation and Recovery Act RI Remedial Investigation RIWP Remedial Investigation Work Plan SCO NYSDEC Subpart 375-6.8 Restricted Use Soil Cleanup Objectives SIM Selective Ion Monitoring SNG Substitute Natural Gas SPT Standard Penetration Test SVI Soil-Vapor Intrusion SVOC Semivolatile Organic Compound TAL Target Analyte List TCE Trichloroethene TOC Total Organic Carbon TPH Total Petroleum Hydrocarbon

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Abbreviations and Acronyms (continued)

URS URS Corporation USCG United States Coast Guard USDOT United States Department of Transportation USEPA Unites States Environmental Protection Agency UST Underground Storage Tank VHB Vanasse Hangen Brustlin, Inc. VOC Volatile Organic Compound

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

1. Introduction

On behalf of National Grid Corporation (National Grid), GEI Consultants, Inc. (GEI) has prepared this Remedial Investigation Work Plan (RIWP) for the Greenpoint Energy Center Former Manufactured Gas Plant (MGP) site, coking plant, and other historical gas production facilities (Site) located in the Greenpoint neighborhood of Brooklyn, New York. This RIWP was prepared in general accordance with the requirements of the:

. New York State Department of Environmental Conservation (NYSDEC) Division of Environment Remediation DER-10/ Technical Guidance for Site Investigation and Remediation (issued May 3, 2010) . Site Characterization and Remedial Investigation Work Plan Requirements detailed in Exhibits G and H of the Order on Consent and Administrative Settlement for Multiple Sites (The Order, dated March 4, 2007) . Modification to the Order (dated May 27, 2008).

The purpose of the RIWP is to describe the methods and procedures to be implemented in performing the Remedial Investigation (RI). As agreed upon in a meeting with the NYSDEC Project Manager on June 9, 2011, the RI will be accomplished in three phases addressing Areas of Interest in order of priority. This RIWP presents a detailed scope of work for Phase 1 of the RI. Separate RIWPs will be submitted to NYSDEC for Phases 2 and 3 of the RI. The scopes of work for Phases 2 and 3 will be developed based on historical plant documents and modified based on the findings in each preceding phase. In addition, investigation activities may be conducted in areas out of sequence to support capital improvement projects. Plate 1 presents a site plan with historical operation features. Plate 2 shows sampling locations of previous investigations and proposed sampling locations for each phase. Descriptions of the Phase 1 investigation areas are provided in Section 2.3, Areas of Interest and investigation sequencing is presented in Plate 3.

This RIWP provides the specific scope of work for Phase 1 of the RI, but also addresses the field investigation procedures that are applicable to all RI phases. As noted, separate RI work plans will be submitted addressing Phase 2 and 3 RI scopes of work.

The overall objectives of all phases of the RI include:

. Evaluation of potential source areas related to former operations at the Site and current and former operations adjacent to the energy facility that may have potentially impacted the Site.

1 REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

. Evaluate the necessity and potential efficacy of an Interim Remedial Measure (IRM) along the bulkhead. . Investigation and evaluation the potential need for remediation at the proposed Maspeth Regulator Station area scheduled for capital improvement in 2012. . Performance of a structures soil vapor survey in accordance with NYSDOH Guidance for Evaluating Soil Vapor in the State of New York. . Evaluation of the nature and extent of any identified contamination. . Identification of potential pathways of contaminant migration and possible receptors. . Characterization and identification of potential contaminant sources. . Development of an environmental and qualitative human health risk assessment.

In accordance with DER-10 requirements, the RIWP is organized according to the following sections. The content of each section is in general conformance with the requirements of DER- 10.

. Section 1: Introduction . Section 2: Site Background . Section 3: Scope of Work . Section 4: RI Report Preparation . Section 5: Schedule . Section 6: Project Team . Section 7: References.

The appendices to the RIWP contain site-related documents and photographs, available environmental investigation reports, environmental records, a field sampling plan (FSP), a quality assurance project plan (QAPP), a site-specific health and safety plan (HASP), and a community air monitoring program (CAMP). A Citizen Participation Plan will be developed for the Site by National Grid and is not a part of this RIWP.

The approximate schedule for the site-wide RI program and report preparation is as follows:

. RI Phase 1: Q3 2012 through Q2 2013 . RI Phase 2: Q3 2013 through Q2 2014 . RI Phase 3: Q3 2014 through Q2 2015 . RI Report Preparation: Q3 2015 through Q2 2016.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

2. Site Background

2.1 Site Description

The Site is currently a liquefied natural gas (LNG) facility located in the Greenpoint neighborhood of Brooklyn, New York (Figure 1). Various portions of the Site have been used for industrial purposes throughout a history dating to at least 1838 and generally have included the following operations:

Approximate Timeframe Operations 1838 - 1915 Peter Cooper Glue Factory 1870 - c 1907 Demuth Glass Manufacturing Company 1927 - 1952 MGP Water Gas Plant 1928 - 1952 Coke Oven Gas Plant 1952 Water Gas Plant converted to Oil Gas; Coke Ovens decommissioned 1968 - Present LNG facility 1973 - 1989 SNG Plant

The Site occupies Tax Block 2837; Lot 1 comprised of approximately 117 acres and is bounded on the south by Maspeth Avenue, on the west by Vandervoort and Porter Avenues, on the north by Division Place and Lombardy Street, and on the east by Newtown Creek. The area surrounding the Site is predominantly industrial and manufacturing, with some commercial, and residential buildings to the northwest. The Site is generally flat, with a ground surface between approximately elevation (El.) 10 and 20, except for the northwestern portion of the Site which rises to approximately El. 65. All elevations are in units of feet referenced to North American Vertical Datum of 1988 (NAVD88).

The Site is divided internally into two major operational areas: the LNG facility occupying the general northern half of the Site, and gas transmission and operations support facilities in the southern half of the Site. The Site also has a Soil Recycling Facility west of Varick Avenue, which is owned and operated by National Grid. The entire Site is fenced along its perimeter with the LNG facility fenced internally, separating it from the operations area. The Site operates 24- hours per day with full-time site-wide security.

The Site is adjacent to Newtown Creek, a federal Superfund site. An RI focused on the creek is being conducted by ExxonMobil, BP, Texaco, Phelps Dodge, NYC and National Grid under the oversight of the United States Environmental Protection Agency (USEPA). The Newtown Creek

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

RI is studying Newtown Creek from bank to bank and the surficial and deeper sediments along the creek as well as the entire length of the creek which is 3.8 miles and includes Dutch Kills, Maspeth Creek, Whale Creek, East Branch, and English Kills.

Throughout its industrialized history, more than 50 industrial facilities were located along Newtown Creek, including oil refineries, petrochemical plants, smelting companies, fertilizer and glue factories, sawmills, and lumber and coal yards. During this time the creek was crowded with commercial vessels, including large boats bringing in raw materials and fuel and taking out oil, chemicals, finished products, and metals. In addition to the impacts that resulted from all of this activity, the City of New York dumped raw sewage directly into the water beginning in 1856 and continues to discharge urban stormwater runoff into the creek.

Various sediment and surface water samples have been taken along the creek during the past 30 years or so by a number of parties. Petroleum hydrocarbons, pesticides, metals, polychlorinated biphenyls (PCBs), volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs) have been detected in one or more samples. According to the USEPA, the variety and distribution of the detected contaminants suggests that they originated from a variety of sources. Environmental and analytical chemistry as well as other tools can be used to identify the origin of these chemicals.

Hydrocarbons are one group of chemicals found in Newtown Creek. Crude petroleum, its refined products, coal, coal tar and coal tar products, as well as the products of incomplete combustion consist primarily of hydrocarbons. In environmental chemistry and geochemistry, hydrocarbons are placed in subgroups according to their origins. These groups include diagenic, or recently produced; petrogenic, produced at relatively low temperatures over long periods of time; and pyrogenic hydrocarbons, produced at high temperatures with a shortage of oxygen. Petrogenic hydrocarbons are those found in crude oil, coal and their refined products. Pyrogenic hydrocarbons are those found in coal tar and related substances, and resulting from the incomplete combustion of organic matter. The concentrations and distributions of individual compounds in specific petrogenic and pyrogenic substances vary, and can be used to identify the source of those substances.

The oil refineries, petrochemical plants, fertilizer and glue factories, coal yards, and other industrial and urban discharges are all potential, and in some cases substantial sources of both petrogenic and pyrogenic hydrocarbons (as well as other types of chemicals).

Figure 2 shows the surrounding land use and location of sensitive human and ecological receptors (residential areas, schools, parks, public places and wetlands) within a half mile radius of the Site boundary.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

2.2 Site History

The Site was owned and operated by Brooklyn Union Gas (BUG, a predecessor company of National Grid) through most of the 20th century, except for a period of years when the coke oven gas plant was operated by Koppers. GEI has performed a historical record review for the Site which included Sanborn Fire Insurance (Sanborn) maps, old plant drawings, Brown’s Directories of American Gas Companies, aerial photographs, BUG annual reports and early Reports to the New York Public Service Commission from BUG. Based on the records review, the following is a general description of the Site development and history.

Prior to the purchase of the property by BUG, the Site contained two other industries in the mid- 1800s. Peter Cooper, a major New York industrialist, built a glue factory on Maspeth Avenue near Newtown Creek in 1838 (www.rebresearch.com). It appears on both the 1888 and 1907 Sanborn maps. The Peter Cooper Glue Factory was noted to be the largest in the country in the mid 1800s and seized the operations in 1915. To the north of the glue factory was the Demuth Glass Manufacturing Company near Lombardy Street and Newtown Creek which started operations near 1870. It appears on the 1888 Sanborn map and seized the operations around 1907.

During the late 1880s, the shoreline of the Site was different than existed when the facility was built in the 1920s. Newtown Creek to the east consisted of two channels that wrapped around an island, named Mussel Island. There was also a drainage feature from the central part of the Site which flowed south into what is now the English Kills channel of Newtown Creek. Both the original pre-1900 creek channel to the east and the drainage to the south may have some bearing on the groundwater flow regime at the Site today. By 1928 both of these features were no longer present, i.e., Mussel Island and the channel between the island and the mainland were filled and made part of the Site when a bulkhead system (relieving platform) was constructed and the southern drainage feature was filled in. Plate 1 shows the former location of Mussel Island and historical plant operation features described in a greater detail below.

Gas was manufactured at the Site over a 62 year period between 1927 and 1989. During that time, gas was made using the carbureted water gas, coke oven gas, oil gas, liquid petroleum (LP) gas, propane air gas, substitute natural gas (a naphtha conversion), and refinery air gas processes in different time frames and stages. When the first plant was built in 1927 (discussed in further detail below), carbureted water gas production was 20 million cubic feet per day (cf/d). Peak production from manufactured gas occurred in 1947 when approximately 98 million cf/d was manufactured using six different processes.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

As natural gas was brought into Brooklyn in the early 1950s the original water gas and coke oven plants were retired and demolished. Some of the other processes, i.e. LP, oil gas and refinery gas, were used only for standby purposes. By the late 1960s LNG was stored at the Site and in the mid 1970s a modern substitute natural gas (SNG) plant was built which produced 60 million cf/d. The SNG was used for base load conditions. It operated for approximately 15 years before it was shut down in 1989, due mainly to economical reasons. The LNG facility still stands today and the Site is used as a major regional regulator station for the natural gas network.

Construction started on the water gas plant in 1925 and by 1927 the plant was operational as was the first of two large waterless (tar-seal) gas holders in the southwest corner of the Site. The 15 million-cubic-foot gas holder, at the time, was one of the largest in the world measuring 254 ft in diameter and over 330 ft tall. This distribution gas holder and eventually a second 17 million- cubic foot waterless gas holder built in 1949, made up what was called the Maspeth Station. The water gas plant included a boiler house separate from the generator house. Coal used to fire the boilers and provide fuel for the water gas generators was brought in by ships that were docked along the bulkhead on the creek. A large coal and coke storage yard separated the gas generator building from the creek by a distance of over 625 ft. The relief holder for the water gas plant held 1 million cf of gas and was located directly to the west of the generator house. The purifiers were situated well to the west of the generator house on the other side of Varick Avenue, a plant road that ran north to south through the center of the Site. The tar separator, tar pump house and storage tanks were placed to the north of the generator house. Carburetion oil tanks were located on Varick Avenue.

A year after the water gas plant was built, the Koppers coke oven gas plant and by-product plant were built and operational. The coke plant was adjacent to and south of the water gas plant. The by-product plant was south of the coke oven batteries and close to Maspeth Avenue. The coke plant had two batteries of 25 ovens each along with all the ancillary facilities, i.e. quenching tower, gas coolers, gas scrubbers, coke sizing mill, and related facilities. A separate producer gas plant that provided another source of raw gas to the coke ovens was built between the boiler house of the water gas plant and the coke plant. It had its own 40,000cubic-foot relief holder, gas scrubbing and condensing facility. The by-product plant contained ammonia liquor tanks, tar storage tanks, ammonia coolers, and related facilities. A salt water pump house, designed to withdraw water from Newtown Creek, was located where Maspeth Avenue met Newtown Creek. A 1933 photograph of the Greenpoint Works and the Koppers Coke Oven gas plant, presented in Appendix B, Aerial Photographs shows most of the unit operations listed above.

The gas works at the Site remained with the same configuration through the 1930s, then in 1941, at the start of World War II, a light oil plant was built adjacent and to the west of the by-product plant. As with other light oil plants around the country at the time, it produced ingredients for the manufacture of munitions. The by-products and light oil plants remained at the site until 1952 when the coke plant was decommissioned.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

The next significant change to the gas works began in 1945 when the water gas plant was fitted to manufacture gas from heavy oil. Over a 5 year period ending in 1950 the heavy oil plant gradually replaced the water gas sets with oil gas generators. Along with this replacement a number of ancillary facilities were built that included additional tar storage tanks, tar emulsion containment areas, a tar dehydrator facility, an oil storage tank farm, a conveyance system to off- load heavy oil from tankers docked on the north end of the Newtown Creek bulkhead and to pump tar into barges for processing off Site.

The exact amount of tar produced at the Site can only be estimated, but based on data reported to the Public Service Commission in 1950, the combined gas plants probably produced close to 20 million gallons of tar in that year, of which approximately 40 percent was used as on-site boiler fuel. The remaining tar was shipped off Site. After 1950 with the introduction of natural gas and LNG, the use of coal and oil to manufacture gas was shortly eliminated.

Some of the operations at the Site used a number of feedstock materials (e.g., coal and oil) and generated a variety of products and byproducts; some of these materials were petrogenic in nature and some pyrogenic. Given the number and nature of other commercial and industrial operations (i.e., oil refineries, petrochemical plants, coal yards, scrap yards, service stations, and other industrial and general urban sources) in the immediate vicinity of the Site, it is expected that hydrocarbons and other chemicals from many or all of these sources have impacted Newtown Creek and possibly the Site itself.

2.3 Areas of Interest

The following section describes areas of interest for investigation based on an evaluation of the operating footprint and structures related to the MGP, coking operation, and other gas production facilities formerly located at the Site. As discussed in Section 1, the investigation has been divided into three phases based on priority.

The following discussion is divided into Areas of Interest that will be evaluated during Phase 1 of the Remedial Investigation. However, due to Site Operations needs two borings and monitoring wells planned for the Phase I investigation were installed in November 2011. One boring and monitoring well were installed approximately 70 ft east of the Fleet Transportation building in the area of a proposed UST installation (MW-202, Area of Interest 1). A boring and a shallow monitoring well were required to evaluate subsurface conditions related to excavation and water quality for dewatering discharge permitting. Also, a boring and shallow monitoring well were installed at the location of a planned gas regulator station (MW-201, Area of Interest 3). The area is targeted for construction in 2012 and the boring and the monitoring well were installed to assure that the area was delineated prior to construction.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

The boring at the UST area was installed to 83 ft below ground surface (bgs), and the boring at the planned regulator station was installed to 75 ft bgs. No visual impacts were observed at either drilling location. Soil and groundwater quality testing are underway.

Proposed investigation procedures outlined in this RIWP were followed during the boring and monitoring well installations. Plate 3 presents the location and sequence of intended investigation for each area of interest.

Area of Interest 1

Area of Interest 1 (Area 1) of Phase 1 of the RI covers an area approximately 350 ft by 320 ft at the southeast corner of the Site adjacent to and inland of the Newtown Creek bulkhead. This area was first designated due to an observation of dense non-aqueous phase liquid (DNAPL) found in monitoring well MW-01, its proximity to Newtown Creek, and potential relationship to the former light oil plant operations.

Historically, Area 1 was an open yard between the coke by-product plant and the pier line where coal and coke freighters docked. The closest historical structures include the tar storage tanks on the northeast side of the by-product building and the former light oil plant. These tanks existed for about 30 years when they were retired with the by-product building in 1957. Also nearby are underground gasoline and diesel tanks that are currently in use, they are located on the south and east side of the transportation building.

Borings/monitoring wells will be installed in the monitoring well MW-01 area to further delineate subsurface conditions related to DNAPL observed in the well. Subsurface piping within Area 1 related to the historical development of the Site will also be evaluated as to whether the piping potentially influences the extent and migration of any observed impacts; this will include the review of related drawings/documents and the installation of test pits, as appropriate.

It is important to note that each of the processes or materials, such as DNAPL, gasoline, coal, and light oil, have physical and chemical characteristics that can be generally described, and specific signatures that can be measured by chemical analysis. This RIWP includes sampling and analyses to aid in identifying and classifying potential sources of hydrocarbons at the Site and discriminate them from the many nearby sources.

Area of Interest 2

Area of Interest 2 (Area 2) consists of the portion of land north of Area 1 inland from the bulkhead approximately 150 ft, extending north to Lombardy Street. Historically, much of this area was part of the creek channel before it was filled in 1928 by Brooklyn Union Gas just after

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

the construction of the Koppers Coal Gas Plant. As the gas works became operational, this area was used primarily for coal and ash storage. Coal was delivered by ship and off loaded into a coal yard. Substantial volumes of coal were brought into the plant to fuel the water gas generators, the producer gas plant and the coke ovens.

In 1945 the water gas plant began conversion from carbureted water gas to heavy oil gas. In 1946 a barge loading facility for tar was built at the northern end of the pier line just south of Lombardy Street. Pipelines either fed oil from tankers docked at the bulkhead to the tank farms located in the center of the Site on Varick Avenue or they were used to pump by-products (tars and light oil) into barges and shipped off Site for processing.

Borings/monitoring wells will be installed along the bulkhead to supplement existing borings/monitoring wells to further delineate subsurface conditions. Subsurface piping within Area 2 related to the historical development of the Site will be evaluated as to whether the piping potentially influences the extent and migration of any observed impacts; this will include the review of related drawings/documents and the installation of test pits, as appropriate.

Area of Interest 3

As discussed above, Phase 1work in this area has been completed, no visual impacts were observed.

2.4 Local Environment

The surficial geology of the Site is characterized as the Raritan Formation, a part of the coastal plain sediment deposits. These deposits are underlain by glacial till and outwash deposits. The surficial geology underlying the Site is described as Quaternary till deposits of variable texture. The till was generally deposited beneath glacial ice and consists of variable textured material (clay, silt-clay, boulder clay) (Cadwell, 1989).

The Gardiners Clay underlies the glacial deposits. The Jameco Gravel underlies the Gardiners Clay. Drinking water is supplied by the New York City (NYC) aqueduct system (which receives water from upstate New York) and is the sole source of drinking water within a 3-mile radius of the Site.

Site geology and hydrogeology have been evaluated based on research and results from previous investigations.

2.4.1 Site Geology

The geology of the Site consists of approximately 200 ft of overburden underlain by bedrock. Site geology has been investigated to a limited extent as part of the IRM pre-design investigation

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

program (discussed below), which included soil borings, groundwater sampling and testing, and groundwater elevation gauging.

Overburden has been observed to consist of, in order of increasing depth:

. Fill and recent sand deposits . Drumlin or Moraine deposits (northwest corner of Site) . Marsh deposits (along Newtown Creek and English Kills) . Glacial outwash sands with discontinuous silt and till lenses . Gardiner’s Clay . Deep sand.

The Site is generally flat, with a ground surface between approximately El.10 and El. 20 NAVD88, except for the northwestern portion of the Site which rises to approximately El.65. The observed thickness of the fill ranges from about 30 to 40 ft along Newtown Creek, and 10 to 15 ft inland. Native sand was observed beneath the fill in some locations.

Marsh deposits consisting of peat, silt, and clay are located within the footprint of the former tidal marsh adjacent to Newtown Creek and English Kills. Because higher groundwater potentiometric elevations appear to be associated with thicker marsh deposits, marsh deposit thicknesses are described by location:

. Along Newtown Creek near the LNG process area, 15 to 45 ft thick. . Along Newtown Creek near the former MGP process area, 5 to 10 ft thick . Along Maspeth Ave. west of the Transportation Building, 10 to greater than 45 ft thick . Along Maspeth Ave. east of the Transportation Building, marsh deposits were generally not observed.

Glacial outwash is present throughout the Site, with measured thicknesses of 50 to 70 ft. The glacial outwash was observed to consist of sand, silty sand, and gravel, with occasional gravel seams. The glacial outwash is underlain by the Gardiner’s Clay, observed on Site to be comprised of silty sand and clay with thicknesses ranging from 5 to at least 15 ft. The Site is at the northern extent of the Gardiner’s Clay as mapped by USGS (USGS, 1986), which may explain the minimal thickness and low clay content observed in some locations. The deep sand unit located beneath the Gardiner’s Clay may be related to the Jameco Gravel aquifer; however, the northern extent of the Jameco Gravel as mapped by USGS is about a mile south of the Site. The Fordham Gneiss bedrock was encountered once at 116 ft bgs in a boring installed by GEI along Maspeth Avenue. A historical investigation indicates the depth of bedrock at about 132 to 185 ft bgs in the northern part of the Site. The regional USGS bedrock surface map shows bedrock surface dipping downward from northwest to southeast at about 100 vertical feet per 1.5 miles.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

2.4.2 Site Hydrogeology

Two regional aquifers are present in the area of the Site: the Upper Glacial Aquifer and the Jameco Aquifer. The Upper Glacial Aquifer is unconfined, and includes ground water within the fill, marsh deposits, and glacial outwash units. Ground water in the Upper Glacial Aquifer generally flows southwesterly toward New York Harbor, but locally converges toward the area of Newtown Creek (USGS, 1997). The Jameco Gravel is a confined or semi-confined aquifer, generally located beneath the Gardiner’s Clay. The Site is located about a mile north of the mapped extent of the Jameco Gravel; however, sand present beneath the Gardiner’s Clay on Site may be connected to the Jameco Aquifer.

Groundwater elevation measurements were taken during the Pre-Design Investigation (PDI) in 2009 and 2010. For purposes of this investigation, the Upper Glacial Aquifer has been subdivided into shallow, intermediate, and deep groundwater zones to evaluate the relationships between potentially different flow regimes within the aquifer.

The water table was measured to range from approximately 5 to 10 ft bgs on most of the Site, to a maximum observed depth of 60 ft bgs beneath the hill in the northwest corner of the Site. The water table is part of the Upper Glacial Aquifer. The water table was measured to be highest in the south-central portion of the Site east of Varick Avenue, where ground water appears to be mounded (perched) over the marsh deposits described above. The shallow-zone flow direction was observed to be northeasterly (toward Newtown Creek) except within the LNG process area, where flow was observed to be southwesterly, away from the creek.

Groundwater flow direction within the intermediate zone was observed on Site to be southerly toward Maspeth Avenue and English Kills. However, ground water within the intermediate zone at the adjacent BCF Oil site, south of Maspeth Avenue, was observed to be northerly, toward the Site.

Deep zone groundwater measurements were limited to the former MGP process area, as deep well installation was limited to this area. Where measured, ground water within the deep zone was observed on Site to be southeasterly toward the confluence of English Kills and Newtown Creek. Deep zone potentiometric elevations and gradients were similar to those measured in the intermediate zone, indicating a similar flow regime within these two depth zones within the former MGP process area.

Tidal response was measured by continuous electronic gauging in several on-site monitoring wells along Newtown Creek and Maspeth Ave. The measured tidal fluctuation was 4 to 5 ft during the tidal response monitoring. The greatest response to tidal fluctuation was measured along Newtown Creek near the former MGP process area, where ground water was measured to

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

fluctuate from 2 to 3 ft in two intermediate zone wells, and 1.4 ft in a deep zone well. Lesser fluctuations were observed along the creek closer to the LNG process area. Minimal tidal response (0.03 to 0.2 ft) was observed in shallow wells along Maspeth Avenue.

Shallow zone monitoring wells were installed adjacent to major storm drain lines at two locations to assess potential drawdown associated with utilities along Maspeth Avenue and within the former MGP process area.

Overall the groundwater regime at the Site needs further exploration. Additional groundwater monitoring wells are proposed to be installed at the Site during Phase 1 of the RI to aid in hydrogeological evaluation.

2.5 Supplemental Document Review

The initial effort of the investigation has involved collecting and reviewing background information to supplement the existing historical information utilized to prepare this RI scope of work. This background information has aided in focusing the field investigation, particularly with respect to determining potential source areas. The following is a list of sources of information and investigation techniques that have been used to better understand the Site history and to identify potential areas of environmental concern.

. Prior environmental studies/reports . Local agency files . State and federal environmental databases . Interviews with past/present property owners/operators . Interviews with representatives of Greenpoint Energy Center . Historical aerial photographs . Site plans and construction drawings . Historical Sanborn maps . Historical BUG information available from Greenpoint Energy Center files.

2.5.1 Environmental Records Information Summary

GEI completed a search of environmental records for the Site as part of the preparation of this RIWP. An Environmental Data Resources (EDR) report has been compiled for the Site and is provided in Appendix B. A search of the NYSDEC spill incidents and environmental site remediation databases was conducted by GEI on April 30, 2012. The following environmental records were found for the Site.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

NYSDEC Environmental Site Remediation Database Search

The Site has two records in the NYSDEC Environmental Site Remediation Database. The first record provides the Site Code 224052 under the State Superfund Program, Classification 02. The record mentions a preliminary investigation report submitted to NYSDEC in June 2004 for the northeast corner of the Site, which is a part of the newly built gas liquefaction plant. According to the first record, impacts were observed across the plant area predominantly in the shallow depths and a few soil samples have exceeded applicable standards for semivolatile organic compounds (SVOCs), namely naphthalene, benzo(a)pyrene, and benzo(a)anthracene.

The second Environmental Site Remediation Database record refers to the LNG Expansion IRM as the Site Code V00631 under Voluntary Cleanup Program, Classification A. The record contains information about the LNG site characterization in June 2006 and April 2007, as well as the Remedial Action dated June 2006.

NYSDEC Spill Incident Database Search

There have been 19 spills registered from January 1978 through April 2012, which are reported in the NYSDEC Spill Incident Database for the Site. Most spills at the Site were either gasoline or diesel and the reported quantities varied from 1 to 200 gallons (some spills do not have amounts listed). Only one spill is reported to have affected ground water and none – surface water. All the spills reported for the Site are closed.

There have been over 50 spills at the properties adjacent to the Site registered from January 1978 through June 2011, some of which have resulted in spillage to the surface water, namely English Kills. Materials spilled off Site included #2 and #4 fuel oils, waste oil, gasoline, diesel, dielectric fluid and unknown petroleum, and other fluids. Some of the spills reported for the properties within one block of the Site have not been closed as indicated by the NYSDEC spill incident database.

2.5.2 Previous Investigations

A limited number of environmental investigations have been performed at the Site to-date and they largely were limited in area and scope. Such investigations originated starting in 1979, prior to that the investigations were geotechnical in nature and intended to support the facility construction. Below is a summary of the environmental Site investigation reports which were available for review.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Brooklyn Union Gas Naphtha Study Boring Results, Brooklyn Union Gas Company, February 1979

Starting in January 1979, BUG, at the request of the United States Coast Guard (USCG), drilled soil borings in the Naphtha Tank Farm Area in the north-west part of the Site. These borings assisted the USCG in defining the extent of an underlying hydrocarbon deposit located in the Greenpoint area of Brooklyn. The study was prompted by the USCG observation of large quantities of oil in Newtown Creek on September 2, 1978 and the fact that the BUG Site hosted oil and gas operations and was situated along Newtown Creek less than a half- mile away from the location of observed oil seepage at the foot of Meeker Street. Ultimately, as described below (Geraghty and Miller investigation), it was concluded the observed oil seepage was unrelated to BUG and the Site.

A total of 17 borings were drilled at the Naphtha Tank Farm Area. The investigation targeted the depth interval at and slightly below the water table. All borings were installed utilizing hollow stem augers. When the water table was encountered, a well with a 10 ft screen was installed. No contaminants were found in either the water or the soil samples taken from the available test points in the Naphtha Tank Farm Area. The samples were examined by both BUG and the USCG. The boring locations are shown in Plate 2.

Investigation of Underground Accumulation of Hydrocarbons along Newtown Creek, Brooklyn, New York. Geraghty and Miller, Inc., July 1979

The report summarizes the results of a study carried out by Geraghty and Miller on behalf of the USCG which investigated a large accumulation of hydrocarbons in the subsurface of Brooklyn, New York. The investigation began in September 1978 and continued until June 1979. The horizontal and vertical extent of the petroleum product was mapped through installation of test borings and collection of field measurements. The t Site was one of the facilities under investigation. The other possible sources of hydrocarbon accumulation were thought to be oil terminals, and pipelines which are present throughout the area.

A total of six borings were installed around the tank farm in the north-west part of the property and one additional boring along Lombardy Street at the foot of Stewart Avenue to a depth of up to 53 ft bgs. According to the report, no traces of hydrocarbons were found in any of the soil or water samples collected from the wells installed at the boring locations. Based on these results, Geraghty and Miller concluded that the spill did not originate at the Site. The boring locations are shown in Plate 2.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Ground-Water Contingency Plan for the Brooklyn Union Gas Company Petroleum Bulk Storage Facility, Roux Associates, 1990

Roux Associates was retained by BUG in June 1989 to install and sample five ground-water monitoring wells at the petroleum bulk storage facility in the north-west part of the Site. The purpose of the monitoring wells was to evaluate groundwater quality, to determine if any petroleum hydrocarbons were present near above-ground storage tanks, and to monitor for future leaks at the Site.

The five wells were initially sampled in July 1989 and then re-sampled during January 1990 and May 1990. During the July 1989 sampling event, the five wells were sampled for BTEX and petroleum products (i.e., gasoline, kerosene, and fuel oil). During the January sampling event, the five monitoring wells were sampled for BTEX, gasoline, kerosene, fuel oil, and lubrication oil. During the May sampling event, the five monitoring wells were sampled for BTEX and for polycyclic aromatic hydrocarbons (PAH). No above-mentioned constituents were detected during the three sampling events. No free product had been found in the five monitoring wells when measurements were taken by Roux Associates’ personnel or during monitoring of the wells for free product by BUG personnel. The boring locations are shown in Plate 2.

Underground Storage Tank Closure Report, Lexicon Environmental Associates, 1993

In July 1993 Lexicon Environmental Associates observed the removal of two 4,000- and two 550-gallon tanks located at the south-west side of the Transportation Building. The 550-gallon tanks were in service from 1959 to 1988 and were only used for gasoline storage. The 4,000- gallon tanks were in service from 1977 to 1993 and were also only used for gasoline storage. The excavation outside of the concrete vaults that housed the 550-gallon tanks exposed contaminated soils that exhibited an odor not characteristic of gasoline-contaminated soils. Five soil samples were collected following the tank removal from depths of between 3 to 45.5 ft bgs, and one soil sample exhibiting the highest field VOC reading was additionally submitted for characterization and identification of potential contaminant sources. All five samples identified the presence of several VOCs in varying quantities. Naphthalene was identified at concentration of 20,000 µg/L in one of the soil samples. A petroleum hydrocarbon analysis obtained from one of the tank pit soil samples did not match gasoline, fuel oil, or diesel fuel reference standard patterns. The peaks identified in the analysis were heavy molecular weight hydrocarbons. The boring locations are shown in Plate 2.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Underground Storage Tank Groundwater Investigation, Fanning, Phillips & Molnar, 1993-1995

Fanning, Phillips & Molnar (FP&M) were retained by BUG to perform an underground storage tank (UST) groundwater investigation following the removal of four USTs located at the southwest side of the Transportation Building in July of 1993. The investigation findings noted:

. USTs tested tight, tank steel in excellent condition . Regarding the condition of the 550-gallon tank concrete vaults: clean sand backfill, no gasoline contamination evident . Regarding the condition of the concrete encasing of the 4,000-gallon tanks; no staining . Soil samples exhibited naphthalene levels not indicative of gasoline.

The NYSDEC required BUG to install groundwater monitoring wells at the southwest UST area based on the levels of hydrocarbons present in soils. Four wells were installed following this request in 1993 and 1994. Free product was encountered in monitoring wells W-1 and W-2 (noted on Plate 2 as 13-GPEC-W-1 and 13-GREC-W-2) one week after development. During drilling of monitoring wells W-3 and W-4, petroleum-contaminated soils were encountered at the water table. Free product was not detected in wells W-3 or W-4.

The closest previously-existing monitoring well to the tank excavation was GPW-7, located 365 feet west of the UST area, it was installed in 1987. The drilling log for the well indicates that soil samples obtained from the vadose zone, water table, and the saturated zone exhibited a weathered gasoline odor and the cuttings had a slight sheen. The depth to water was approximately 7 ft bgs. The groundwater sample at GPW-7 had 1,800 mg/l of benzene present (FP&M, 1995). The boring locations are shown in Plate 2.

Investigation of Proposed UST Locations East of Transportation Building, Groundwater Technology, Inc., 1995

Groundwater Technology, Inc. (GTI) installed five geotechnical borings and a monitoring well at the request of BUG to support the replacement of the existing USTs at the east side of the Transportation building. Soil samples were collected during the boring installation at 5 to 7 and 10 to 12 ft bgs intervals. A monitoring well was completed to a depth of 20 ft and a groundwater sample was collected following the well installation.

The soils encountered in the bore holes and monitoring well consisted of fill deposits. The water table was located at approximately 11 ft bgs. Soil samples indicated elevated concentrations of benzene, xylene, 1,2,4, trimethylbenzene, and naphthalene. The groundwater sample only had elevated benzene and none of the other abovementioned compounds.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

A memorandum related to the boring installation indicates observation of elevated VOC field readings in soil below the water table starting at 15 ft bgs. The highest VOC field reading of 600 milligram per kilogram (mg/kg) was observed at 27 ft bgs. The memorandum describes soil at that depth as “saturated with a black liquid” and having a visible sheen. The VOCs levels reduced at 32 ft bgs, where a clay layer was encountered. The boring locations are shown in Plate 2.

Preliminary Evaluation of Maspeth Holder Demolition Impacts, Vanasse Hangen Brustlin, Inc., 2001.

At the request by KeySpan Energy (the owner of the Greenpoint Energy Center at the time) Vanasse Hangen Brustlin (VHB) performed a preliminary evaluation of KeySpan’s analytical data collected prior, during and after the demolition of the Maspeth Holders which were demolished by implosion on July 15, 2001. Surface samples were collected prior and after the demolition of Holders 1 and 2 from the depth interval 0 to 1.5 centimeters bgs from 76 locations near the holders, including areas outside the Site. All soil samples were analyzed for lead addressing a concern of elevated lead concentrations which could have originated from paint chips flaking from the Maspeth Holders. Surface wipe samples were collected from a variety of hard surfaces and also analyzed for lead. The surface soil sampling locations are shown in Plate 2.

Lead concentrations in surface soils ranged from 1 mg/kg to 2,600 mg/kg. The highest lead concentration of 2,600 mg/kg registered in a surface soil sample collected outside the Site a few days before the Maspeth Holders implosion. The overall average lead concentration for surface soil samples collected pre-demolition was 339 mg/kg while the post-demolition overall average concentration was 322 mg/kg. VHB concluded, that based on analytical results, pre- and post- demolition lead concentrations in soil were not significantly different on a statistical basis.

Greenpoint Holder Soil Sampling Results, Miller Environmental Group, 2002.

A soil sampling program was carried out by Miller Environmental Group in November 2002 in the vicinity of the Maspeth Holder Station Holders 1 and 2. Soil samples were collected from 27 locations to a depth of 1 ft bgs and analyzed by KeySpan Laboratory Services for lead. No formal report was found, but according to the available lab analytical reports, lead concentrations ranged from 35 mg/kg to 12,100 mg/kg. The sample with highest lead concentration was collected from the ground surface. No map of sampling locations was provided.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Preliminary Subsurface Investigation at the Greenpoint Operations Center, Miller Environmental Group, 2003.

Miller Environmental Group was retained by KeySpan Energy Corporation to perform a preliminary subsurface investigation at the Site in December 2002. Three borings and one temporary well were installed in the vicinity of LNG Tank 2 to a maximum depth of 13 ft bgs. Three soil and two groundwater samples were analyzed for Resource Conservation and Recovery Act (RCRA) metals, VOCs, SVOCs, cyanide, and diesel range compounds (DRO). Soil was also analyzed for petroleum products, and dielectric compounds. An Oil/NAPL sample was recovered and identified by the lab as a #6 fuel oil. The sampling locations are shown in Plate 2. According to the Miller Environmental Group, the investigation indicated residual MGP waste at each sampling location both by field observations and analytical results.

Northeast Corner of the Greenpoint Energy Center (Liquefaction Plant), Paulus Sokolowski & Sartor Engineering, PC, 2004-2007

Site investigation activities were conducted by the Paulus Sokolowski & Sartor (PS&S) Engineering Company from 2004 to 2007 at the request of National Grid in the area of the proposed LNG liquefaction facility in the north-east part of the Site. The investigation activities were intended to support a remedial investigation of the area, and an IRM design and implementation. Investigation activities included the installation of 58 soil borings, multiple test pits, soil vapor monitoring points, groundwater monitoring wells and the collection and laboratory analysis of soil, soil vapor and groundwater samples. Soil samples were analyzed for VOCs, SVOCs, PCBs, RCRA metals and cyanide. The sampling locations are shown on Plate 2. A summary of the observations based on the available PS&S reports is presented below:

. Within the investigation area underlying the proposed LNG liquefaction facility, areas of subsurface soil exhibiting tar fragments, saturation, staining or coating, were encountered primarily in the first 5 ft bgs. Visual impacts were observed to a maximum depth of 18 ft bgs. . The highest VOCs and SVOCs concentrations were observed in the subsurface soil samples collected from 0 to 6 inches above the groundwater table. VOC and SVOC concentrations decrease below a depth of 5 ft bgs. . Naphthalene odors were observed to a maximum depth of 3 ft bgs while fuel-like odors were observed to a maximum depth of 45 ft bgs.

Subsequently, an IRM was implemented under the approval of the NYSDEC addressing the impacted soil prior to the construction of the liquefaction facility.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Pre-Design Investigation Program, GEI Consultants, 2009-2010

GEI conducted a pre-design investigation to assess the need for a bulkhead IRM in accordance with a NYSDEC-approved Pre-Design Investigation (PDI) Work Plan, Cutoff Wall Interim Remedial Measure dated January 9, 2009, and Supplemental Pre-Design Investigation Work Plan, Cutoff Wall Interim Remedial Measure dated April 8, 2010. The investigation is not complete; however, the present findings indicate a limited potential area of concern in the vicinity of MW-01. This area will be further delineated as discussed in this work plan and as agreed upon by the NYSDEC in a meeting on June 9, 2011. Data to be gathered in Phase 1 of the RI will be used to finalize the investigation and determine if an IRM is warranted.

Interim Remedial Measure Pre-Design Investigation, 2009

GEI Consultants conducted an IRM pre-design investigation (PDI) from March through October 2009. The design program included the following elements:

. Assessment of existing Site conditions including a focused bulkhead and Maspeth Avenue property survey, and utility geophysical survey . Implementation of field investigations to gather geotechnical, hydrogeologic and environmental data . Macro-scale groundwater modeling for the Site.

Field observations during the investigation indicated the presence of NAPL and chemical odors in the subsurface soils along the bulkhead structure. Twenty-two soil borings and 15 groundwater monitoring wells were installed from April through June 2009 at the Site. Along the bulkhead the borings were installed up to a depth of 114 ft bgs or approximately El.-103 (NAVD88). The deepest visual impact along the bulkhead was observed between El.-90 and -95. Based upon field observations, NAPL-saturated soil was observed at El.-40 to -44 in the southern part of the bulkhead (area of MW-01), between approximately El.-91 and -94.5 in MW- 03D, and at approximately El.-21 to -23 in the area north of LNG Tank 1 (MW-05D). No NAPL-saturated soil was observed above the mud line elevation of the creek.

A series of wells were installed along Maspeth Avenue in July 2009 to monitor groundwater elevations. Eight wells were installed to a depth of up to 18 ft bgs. Locations of the wells are presented in Plate 2. One boring indicated the presence of black staining between 0 and 2 ft bgs but the field PID measurements registered only slightly elevated VOCs at that soil interval.

A series of geotechnical borings were installed from August through October of 2009. Twenty- eight borings were installed during this time to a depth of up to 121.9 ft bgs and eight borings were completed as groundwater monitoring wells. Thirteen locations were subjected to cone

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

penetrometer test. Of the twenty eight borings installed between August and October 2009, fourteen indicated presence of visual impact or odors.

Soil analytical results indicate that VOCs, SVOCs, PCBs, metals, and cyanide are present at detectable concentrations in one or more of soil samples collected during the investigation. Several PAHs, benzene, dibenzofuran, and five metals were detected at concentrations which exceed NYSDEC Subpart 375-6.8 Restricted Use Soil Cleanup Objectives - Industrial (SCO).

Groundwater analytical results indicate that VOCs, SVOCs, metals, and cyanide are present at detectable concentrations in one or more of the groundwater samples collected during the investigation. PCBs were not detected in any of the samples collected. BTEX compounds, a subset of other VOCs, several PAHs, three SVOCs, a subset of metals and cyanide were detected at concentrations which exceed NYSDEC Ambient Water Quality Standards (AWQS) and Guidance Values for GA ground water.

Locations of the borings are presented in Plate 2. Soil boring logs and analytical results are presented in Appendix B, GEI Investigation Data.

Supplemental Interim Remedial Measure Pre-Design Investigation: Cutoff Wall, Newtown Creek, 2010

GEI performed a Cutoff Wall IRM Supplemental Pre-Design Investigation (PDI) in 2010 in accordance with a NYSDEC-approved Supplemental Pre-Design Investigation Work Plan, Cutoff Wall Interim Remedial Measure dated April 8, 2010. The Supplemental Investigation was required to further define geotechnical, geologic, hydrogeologic, and environmental conditions at the Site. The area of specific interest was the southern bulkhead area along Newtown Creek. The focus of investigations was to further assess the subsurface presence of NAPL inboard and outboard of the bulkhead/dock structure, and in the sediments offshore along the southern alignment of the structure.

Sixteen soil borings were installed along the bulkhead as a part of the supplemental IRM pre- design investigations. The borings were installed to a depth of up to 135 ft bgs. Eight borings were finished as groundwater monitoring wells. In addition, the existing polyvinyl chloride (PVC) monitoring well MW-01 was replaced with a 4-inch-diameter stainless steel well. Either odors or visual impacts were observed in 10 of the installed borings.

The findings confirmed results of the 2009 investigation in that, based upon field observations, no NAPL-saturated soil was observed above the mud line elevation of Newtown Creek. Tar saturated soil was observed below the mud line at approximately El.-64 to -68.5 in SB-105(MW- 02D) in the bulkhead area.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Soil analytical results indicate that VOCs, SVOCs, PCBs, and metals were present at detectable concentrations in one or more of soil samples collected during the investigation. Several PAHs and arsenic were detected at concentrations which exceed NYSDEC SCO.

Groundwater analytical results indicate that VOCs, SVOCs, metals, and cyanide are present at detectable concentrations in one or more of groundwater samples collected during the investigation. PCBs were not detected in any of the samples collected. BTEX compounds, a subset of other VOCs, several PAHs, three SVOCs, a subset of metals and cyanide were detected at concentrations which exceed NYSDEC AWQS.

A sediment sampling program was carried out in July 2010 in Newtown Creek along the bulkhead. Sediment samples were collected from 31 locations primarily focused in a grid pattern about 600 ft long along the bulkhead extending about 300 ft into the creek. Surface sediment samples were obtained with a Ponar sampler from 0 to 6 inches below the mud line. In addition, Vibracore sampling was completed from the mud line to a depth of 20 ft. All sediment samples were analyzed for VOCs, SVOCs, PAHs, PCBs, pesticides, herbicides, metals, total cyanide and other parameters including ammonia, black carbon, pH, Sulfide, total nitrogen, total organic carbon, and total phosphorus. Selected sediment samples were analyzed for dioxins and furans. In addition, selected samples were analyzed for total petroleum hydrocarbons (TPH), diesel- range organics (DRO), normal alkanes and isoprenoid hydrocarbons, and alkylated PAHs consistent with the USEPA Draft Remedial Investigation/Feasibility Study Work Plan Newtown Creek, finalized in June 2011. These data may be used to characterize the nature and potential sources of hydrocarbons in Newtown Creek.

Sediment analytical results indicate that VOCs, SVOCs, PCBs, dioxins, pesticides, herbicides, petroleum hydrocarbons, cyanide and metals were present at detectable concentrations in one or more of sediment samples collected during the investigation. Three VOC compounds, several PAHs, bis-(2-ethylhexyl)phthalate, total PCBs, a subset of pesticides, and a number of metals were detected at concentrations which exceed National Oceanic and Atmospheric Administration effects-range-median screening level (ERM).

In general, non-native sediment was about 10-feet thick containing mixed petrogenic (i.e., petroleum-derived) and pyrogenically-derived hydrocarbons. The upper few feet of sediment generally contained lower PAH concentrations in petrogenic patterns consistent with weathered petroleum products and urban background. Mixtures of petrogenic and pyrogenic PAHs were observed in the middle depths, grading to more pyrogenic PAHs at depth. There was a range of pyrogenic PAH patterns in the deeper sediments. The PAH patterns were compared to the DNAPL collected from on-site monitoring well MW-01; few matched. More specifically, a few sediment samples contained pyrogenic PAHs in a tar-like pattern similar to the DNAPL from

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

MW-01. There was no clear pattern or specific area where the samples were located except that all of the samples were from the deepest portions of their respective sediment cores, and the sediment cores were north of MW-01 and south of LNG Tank No. 1.

The origin of these impacts is, at this time, unknown given the industrial setting of Newtown Creek, surface water and sediment transport within the creek, and the upstream location of a major combined sewer overflow (CSO) discharge point at Maspeth Avenue.

Sediment sampling locations are presented in Plate 2. Soil boring logs and analytical summary are presented in Appendix B, GEI Investigation Data.

Ball Field Human Health Risk Assessment Program, GEI Consultants, June 2010

GEI conducted an assessment of human health risk in December 2010 for the Site baseball field located at the intersection of Maspeth and Vandervoort Avenues. The human health risk assessment was conducted in response to the results of the evaluation of soil samples collected adjacent to the ball field which identified the presence of chemicals of potential concern. Prior to the start of this assessment, the baseball field was used by National Grid employees for a summer baseball league. In addition, the baseball field had been leased by Saint Joseph’s College for their women’s softball team practices and home games during the fall and spring seasons.

GEI evaluated the potential exposure of receptor populations to surface soils and soils immediately beneath the baseball field. The receptor populations evaluated in this assessment included: child visitor, adult worker, and student player. To evaluate soil conditions, GEI collected 42 soil samples on June 25, 2010, from the 0 to 2 inch and 2 to 6 inch depth intervals in a grid across the baseball field. The samples were analyzed for SVOCs, PAHs, PCBs, and metals. Based on the evaluation of potential exposures to the human receptors at the baseball field, the cancer risk estimates for a child visitor, adult worker and student player at the baseball -4 -6 field are within the USEPA acceptable cancer risk range of 1x10 to 1x10 . However, to be conservative, National Grid subsequently suspended use of the ball field.

Maspeth Regulator Station Investigation: April 2011

GEI performed a soil reuse sampling program in April of 2011 within the proposed Maspeth Regulator Station footprint in support of the construction of the station in 2012. A total of 8 borings were installed to the depth of up to 8 ft bgs. Soil samples were collected from the 0 to 2 ft bgs interval and from the 5 to 6 ft bgs interval for a total of 16 samples. All soil samples were analyzed for VOCs, SVOCs, PAHs, metals, PCBs, pesticides, herbicides, and cyanide.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Soil analytical results indicate that VOCs, SVOCs, pesticides, metals, and cyanide are present at detectable concentrations in one or more of soil samples collected during the investigation. PCBs and herbicides were not detected in any of the samples collected. Several PAHs and two metals were detected at concentrations which exceed NYSDEC Industrial SCO. The boring locations are shown in Plate 2.

Off-Site Potential Source Areas

The following section addresses areas of known contamination located in close proximity to the Site.

Newtown Creek/Greenpoint Oil Spill Study, U.S. Environmental Protection Agency, 2007

The Newtown Creek oil spill was discovered in September 1978 by a USGS routine patrol (Geraghty & Miller, 1979). Oil accumulation was observed in Newtown Creek that on further investigation was found to be seeping from a bulkhead at the foot of Meeker Avenue. The firm of Geraghty & Miller completed the initial investigation of the oil spill extent on land in 1979 at the request of the USCG and produced the first map of the spill extent (Geraghty and Miller, 1979). According to their estimates the most product accumulation occurred under the Exxon Mobil facility with the oil plume limit extending to within one block of the northern border of the Site. Geraghty & Miller indicated that the minimum spill volume was about 17 million gallons. Product recovery estimates and the present free-product extent suggest that the 1979 estimate may have been somewhat low. Smaller additional spills have occurred after the discovery of the Meeker Avenue seep and have been documented in various reports (USEPA, 2007).

Over 20 additional investigative studies were completed by 2007 and numerous work plans, progress reports, and information packages were issued since 1979 in the area of the spill (USEPA, 2007). Approximately 35 product and groundwater recovery wells and over 200 monitoring or observation wells were installed since 1978. Parties to the investigations have included major petroleum companies that have operated terminals or other facilities in the area for many decades, both before and after the spill discovery. In the early stages of the investigation BUG was considered to be a potentially responsible party for the oil spill. The area under investigation was the tank farm area in the north-west part of the Site and the pipelines connecting the oil spill area and the Site. Subsequent soil and groundwater sampling and analysis did not confirm that allegation (Geraghty & Miller, 1979). Locations of the soil borings at the Site from 1979 study are presented in Plate 2.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

At present, the extent of the free-product petroleum plume is divided into four specific areas of

responsibility: (1) the “on-site” area which includes the Exxon Mobil properties that overlie the northern portion of the plume, (2) the BP Amoco terminal that borders Newtown Creek to the southeast of the Exxon Mobil facility, (3) the “off-site” area which includes commercial and residential areas in the central and southern portion of the plume for which Exxon Mobil has taken remedial responsibility, and (4) the former Paragon Oil Property (now Peerless Importers and Steel Equities facilities) bordering Newtown Creek, now being remediated by Chevron Texaco. Close to 11,800,000 gallons of oil have been recovered to-date. Remediation efforts by the abovementioned parties are on-going (http://nysdecgreenpoint.com/).

Meeker Avenue Plume Trackdown, URS Corporation, 2008, 2009

The Meeker Avenue Plume Trackdown Site (NYSDEC Site No. 2-24-121) is located in the residential area of the Greenpoint/East Williamsburg Industrial Area section of the Borough of Brooklyn, New York, to the north-west of the Site. The investigation area is located in a region of historical petroleum refining and storage. Based on results of several investigations by the URS Corporation (URS) conducted in the area chlorinated solvents such as tetrachloroethene (PCE) and trichloroethene (TCE) were found in soil vapor, soil and ground water in the areas outside the Exxon Mobil petroleum spill. As these chemicals are not related to petroleum, NYSDEC initiated investigation to determine the source(s) of this contamination. The investigation area closest to the Site is the residential area located south of the Brooklyn-Queens Expressway and is the area of the soil-vapor intrusion (SVI) investigation.

To the south of Meeker Avenue, soil vapor samples indicate potential sources of PCE and TCE as follows: near a former and current metal working facility on the east end of Vandervoort Avenue between Anthony and Lombardy Streets (1,100 µg/m3 PCE, 1,00 µg/m3 TCE), near a former dry cleaner in the block bound by Richardson and Frost Streets between Morgan and Vandervoort Avenues (310,000 µg/m3 PCE, 19,000 µg/m3 TCE); and near a former dry cleaner in the block bound by Beadel Street and Division Place between Morgan and Vandervoort Avenues (13,000 µg/m3 PCE, 370 µg/m3 TCE). A potential source of 1,1,1-trichloroethane (1,1,1-TCA)(6,600 µg/m3) and 1,1 –dichloroethane (1,1-DCA)(2,000 µg/m3) was also identified near a former drum storage area and current metal recycling facility on the east side of Vandervoort Avenue between Lombardy and Beadel Streets (URS, June 2008).

URS completed a residential air sampling effort to further assess soil vapor intrusion in the Greenpoint/East Williamsburg Industrial Area neighborhood in February through March 2008. The investigation area was located immediately north-west of the Site, and was bounded by Lombardy Street and Division Place between Morgan Avenue and Porter Avenue. Twelve residential properties were investigated for vapor intrusion. PCE concentrations in the sub-slab samples ranged from 51 µg/m3 to 70, 000 µg/m3, TCE concentrations in the sub-slab samples

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

ranged from 1.2 µg/m3 to 3,300 µg/m3; 1,1,1- TCA concentrations in the sub-lab samples ranged from 2.6µg/m3 to 580 µg/m3. Freons (i.e., 1,1,2-tricloro-1,2,2-trifluoroethane, dichlorodifluoromethane, and trichlorofluoromethane) in the sub-slab samples were detected at concentrations ranging from not detected to 18,000 µg/m3.

The analytical results were compared to the ingredients in the household product inventories. URS concluded that the presence of the household products did not appear to contribute to the presence of chlorinate compounds of interest in the indoor air samples.

Figure “Meeker Ave PCE TCE Plume Extent” provided in the Appendix A, Off-Site Investigations shows the location of the chlorinated solvents plume (http://habitatmap.org/habitatmap_docs/MeekerAvePCETCEPlume.pdf).

BCF Oil Refining Site, Data Collection Plan, RI/FS Study, Newtown Creek, Anchor QEA, 2011

BCF Refining Site is located at 360-362 Maspeth Avenue on English Kills in Brooklyn, New York across the street from the Site. The site is a 1.9-acre former petroleum distribution and oil recycling facility. The facility refined used oil and “tank bottoms” for use in boilers and other energy recovery applications.

A number of site investigations were conducted from1992 through 2009. Results of investigations indicated PCB contamination at the site. VOCs, SVOCs, metals and PAHs were also present in on-site soils. VOCs and a measurable thickness of NAPL were identified in ground water. PCBs were also detected in shoreline sediments and porewater. Sheen was observed on Newtown Creek near the BCF facility. Beginning in May 2000, USEPA conducted an emergency response action at the BCF Oil Site to address concerns about possible leakage from abandoned USTs, ASTs, and drums. The emergency response action removed more than 800,000 gallons of contaminated oil and 65,000 pounds of scrap metal from the BCF Oil Site. (Anchor QEA, 2011). Multiple releases of waste and used oil to English Kills surface water are recorded in the NYSDEC Spill Incidents Database. The site is no longer listed in the New York State Registry of Inactive Hazardous Waste Disposal Sites.

Newtown Creek Remedial Investigation, Laurel Hill Site, Maspeth, New York. Anchor Environmental, L. L. C., 2007

The Laurel Hill site is located across Newtown Creek, directly opposite the Greenpoint Energy Center. Anchor Environmental, L.L.C. implemented remedial investigations both on land and in Newtown Creek adjacent to the Laurel Hill site at the request of Phelps Dodge Refining Corporation. Historically, industrial operations at the Laurel Hill facility included production of sulfuric, muriatic, nitric, and other acids; refining of blister copper; smelting ore concentrates and copper and brass scrap; silver and nickel refining; and tin production. All furnaces were fired by

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

coal until the 1920s when the furnaces were switched to oil stored in two aboveground oil storage tanks. A 1955 plan of the Laurel Hill Facility Uplands indicates a discharge line from the smelting blast furnace into a “slag pond”, which eventually discharged into Newtown Creek via an underground sewer pipe. Smelting operations discontinued around 1960. In 1983 copper operations closed at the Laurel Hill Facility Uplands.

Remediation efforts at the facility began in 1987 under NYSDEC supervision. During the uplands RI efforts, more than 100 boreholes and 38 monitoring wells were installed (Anchor, 2007) to characterize the geology and hydrogeology and to investigate soil and groundwater contamination. The RI results indicated the presence of primarily heavy metals in the fill soils at concentrations exceeding the NYSDEC TAGM 4046 recommended soil cleanup objectives. Metals concentrations in ground water were found to exceed the NYSDEC Class GA groundwater standards. PCBs were found at concentrations exceeding applicable NYSDEC cleanup criteria in soils and concrete in some areas of the Laurel Hill Facility Uplands (Anchor, 2007). A remediation at the facility started in 2003 and involved removal of PCB, mercury and petroleum-contaminated soils; capping in some areas and groundwater containment consisting of a steel sheet pile barrier wall and groundwater collection and treatment system.

Anchor Environmental performed a supplemental remedial investigation from 2004 through 2005 which addressed Operable Unit 6 (OU-6), defined as a portion of the site that abuts the Laurel Hill Facility Uplands and includes submerged areas of Newtown and Maspeth Creek. Sediment, surface water, and porewater samples were collected during the investigation. Throughout OU-6 (Newtown Creek and English Kills), a wide range of contaminants have been detected in surface sediments including metals, PCBs, PAHs, SVOCs, VOCs, pesticides, and dioxins exceeding ERM criteria.

A subset of sediment samples collected in Newtown Creek was submitted for PAH and PCB hydrocarbon characterization (Anchor, 2007). The results of the “parent+alkylated” PAH analysis identified four distinct sources or mixture of PAH in Newtown Creek sediments. Two locations of the sediment samples submitted for PAH forensic analysis were less than 100 ft away from the Site bulkhead, the other three sample locations were positioned both upstream and downstream of the Site extending to the Brooklyn Queens Expressway. Surface sediment samples were collected at all five locations at depth interval from 0 to 10 centimeters below mud line or 0 to 14 centimeters below mud line and subsurface sediment forensic samples were collected at two locations to depths of up to 300 centimeters below mud line. Results of the hydrocarbon characterization were in part summarized as follows “it is unlikely that much of the surface sediment (0-10 centimeters below mud line) PAHs measured near the Laurel Hill Site, across the Creek, or downstream have a significant contribution from either the tar source or the very high temperature pyrogenic PAH sourcing... Rather, their PAH distributions are more consistent with input from weathered petroleum sources.”(Anchor, 2007).

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Equity Manufactured Gas Plant Site

AECOM is currently conducting a remedial investigation at the Equity Former MGP site located at 252-254 Maspeth Avenue in Brooklyn, New York at the request of National Grid. The remedial investigation report is not yet available for this review. Information about the Equity site history and conditions were provided in the Remedial Investigation Work Plan (AECOM, 2009). According to the AECOM Work Plan previous investigation activities which were conducted on portions of the Equity site in 2004 and 2005 are discussed as follows.

- 252 Maspeth Avenue Property:

A Phase II Environmental Subsurface Investigation (ESI) for the 252 Maspeth Avenue Property was conducted in March 2005 by Gannett Fleming Engineers, P.C. (GFE) on behalf of Cooper Tank and Welding Corp. (Cooper Tank), who was the potential lessee of the property (GFE, 2005). GFE installed four soil borings on the property and collected soil samples which were analyzed for VOCs, SVOCs, PCBs, and 13 Priority Pollutant Metals plus barium. Temporary PVC wells were installed in two of the borings, and groundwater samples were collected and analyzed for the same constituents as the soil samples. In soils, VOCs, SVOCs, and various metals were detected in samples from all four borings. PCBs were detected in only one soil sample. Odors and staining were observed in all four borings. In ground water, VOCs, SVOCs and various metals were detected in samples collected from both temporary wells. PCBs were detected in one groundwater grab sample, but the detection is likely turbidity related given the relative insolubility of PCBs in water.

- 254 Maspeth Avenue Property:

A Phase II ESI was conducted for the 254 Maspeth Avenue Property in September 2004 by EEA Inc. (EEA) on behalf of Spencer Realty Corporation (the property owner) and Cooper Tank (the potential property buyer) (EEA, 2004). EEA installed six soil borings on the property and collected soil samples which were analyzed for VOCs, SVOCs, and RCRA metals. SVOCs and various metals were detected in all six borings. VOCs were detected in two of the borings. The subsurface geology was characterized to the completion depth of the borings.

Phase I ESA was conducted for the 254 Maspeth Avenue Property in October 2004 by GFE on behalf of Cooper Tank, who was the potential buyer of the property (GFE, 2004). GFE conducted a records search, interviews and site visit. Surficial soil staining was observed on site. A Phase II investigation of potential soil and groundwater impacts was recommended.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

- 252 and 254 Maspeth Avenue Properties

GFE performed geotechnical investigation work on behalf of Cooper Tank in September 2006 (GFE, 2006). GFE installed five soil borings to investigate the geology below these properties. Only a map and boring logs were available for review. The boring locations are shown in Plate 2, the available information for this investigation is provided in Appendix A.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

3. Scope of Work

The scope of work presented in this work plan addresses field investigation tasks that will provide a better understanding of the potential presence, nature and extent of soil and groundwater impacts on the Site. The proposed site-wide sampling program includes sampling of ground water, soil vapor, indoor air, surface soil, and subsurface soil. The remedial investigation at the Site is proposed to be conducted in phases to address Areas of Interest in order of priority. As such, all work activities discussed below may not be implemented in each phase. However, they are presented in this document with the intent that this work plan acts as the base document for all work activities; the subsequent work plans will then address sampling type and location based on historical and future findings and refer to this plan for the implementation approach. In addition, investigation activities may be conducted in areas out of sequence to support capital improvement projects. As such, in the following sections that address sampling, the initial text will note if the work is to be performed in Phase 1.

Plate 3 presents proposed sample locations for Phase 1, and Table 1 presents sample description, rationale and analysis for each boring..

The scope of work to be performed in this RI includes the following tasks: . Preliminary Site Visit . Mobilization . Field Activities: • Utility Clearance • Surface Soil Sampling • Test Pit Excavation and Soil Sampling • Soil Borings Advancement and Soil Sampling • Monitoring Well Installation • Groundwater Sampling • NAPL Assessment • Soil Vapor Intrusion Investigation • Community and Work Zone Air Monitoring • Decontamination and Management of Investigation-Derived Waste • Survey of Sampling Point Locations . Step I Fish and Wildlife Impact Analysis (FWIA) . Qualitative Human Health Risk Assessment . Quality Assurance/Quality Control and Data Validation . Groundwater Model . Data Reduction and Data Summary . Presentation of Findings.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Descriptions of each proposed work activity are provided separately below.

3.1 Field Investigation Preparation and Mobilization Activities

Upon approval of the RIWP by NYSDEC and authorization from National Grid, GEI will mobilize to the Site and prepare for the field investigation program. A field operations center will be set up on the Site in a construction trailer. The initial field mobilization will include the following items to be completed at the commencement of the field RI activities:

. Establish a field operations center . Establish a decontamination area . Establish a waste storage area . Identify proposed sample locations . Identify underground utilities.

3.1.1 Site Security, Field Operations Center

The Site is not publicly accessible, secured with a perimeter fence and provided with 24-hour security. The internal LNG tanks and plant are separately secured with and internal fence and will require special accommodation in terms of scheduling and investigation logistics. The site is monitored by cameras and a 24-hour security service. Field operations will be centered out of existing on-site trailer.

A temporary fenced “corral” may be constructed to provide additional security for the site trailer, field equipment and the night storage of contactor’s heavy machinery.

3.1.2 Establish Decontamination Area

Equipment decontamination will take place on a plastic lined bermed decontamination area. During the preliminary site visit, the location of the decontamination area(s) will be chosen. For subsequent phases of investigation the decontamination area may be relocated, if necessary. Potable water is not available to certain portions of the Site; consequently water for decontamination will need to be staged at the Site in close vicinity to the decontamination area(s).

3.1.3 Establish a Waste Storage Area

Investigation derived waste (IDW) including soil cuttings, ground water, and decontamination waters will be collected and stored in 55-gallon U.S. Department of Transportation (USDOT)/UN drums at the existing waste storage area consisting of a plastic lined bermed area,

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

roll-off containers or a fractionation tank. The area will be inspected during the preliminary site visit and upgraded as appropriate.

3.1.4 Identify Sample Locations and Underground Utilities

The general position of the proposed RI sample locations will be based on the areas of investigation (Areas 1 through 3 for Phase 1), review of utility plans and input from plant operations staff prior to mobilization, and will be identified during a preliminary site visit. Each proposed boring and subsurface exploration location will be marked with paint or stakes by GEI. The drilling subcontractor will provide the boring locations to New York City and Long Island One Call Center (One Call) to identify potential utility conflicts at the Site boundary and within the street right of ways adjacent to the Site. Each proposed subsurface sample and test pit location will be spotted in such a way as to avoid both active and retired utilities to the extent possible unless the retired utilities are a part of the investigation as potential contaminant sources.

3.2 Field Investigation Activities

This section of the RIWP discusses the proposed field investigation activities for Phase 1 and conceptual approach for Phases 2 and 3 of the Remedial Investigation. Field investigation activities include utility clearance procedures, surface soil sampling, test pit, soil boring, and groundwater monitoring well installation activities as well as soil vapor intrusion assessment, NAPL assessment, and community and work zone air monitoring procedures. Table 2 presents the general rationale and proposed sampling and analyses for the surface samples, test pits, borings, and groundwater monitoring wells. The proposed RI locations and Areas of Interest are shown in Plate 3.

The proposed analyses, analytical methods, and QA/QC samples are discussed under each of the following subsections for surface soil, test pit, soil boring, and monitoring well sampling procedures. Appendix E includes GEI’s Field Sampling Plan that will be implemented during the collection of samples for analysis. Section 3.5 and the QAPP outline the laboratory data deliverables and data validation procedures. A NYSDOH Environmental Laboratory Approval Program (ELAP) approved laboratory will perform the analyses.

3.2.1 Utility Clearance

The general location of the proposed Phase 1RI sample locations is shown in Plate 3. For every location a utility mark-out checklist will be completed by GEI and signed by both GEI and National Grid representatives prior to commencement of intrusive activities. Additional geophysical investigation is proposed if there is an uncertainty about proximity of utilities to a

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

boring or test pit location. It is anticipated that approximately 20 percent of borings and 20 percent of test pits will require geophysical investigation utilizing ground-penetrating radar and/or other means prior to commencement of intrusive activities.

All soil boring and monitoring well locations will be pre-cleared using manual or vacuum extraction methods to a depth of 8 ft bgs. Approximately 20 percent of test pit locations are anticipated to require pre-clearing. Test pits of 10 ft in length or more that require pre-clearing will have at least two pre-cleared locations to attempt to avoid utilities.

CAMP will be implemented at the Site during all intrusive activities (See Section 3.2.11).

3.2.2 Surface Soil Sampling

Surface soil sampling is not planned in Phase 1 of the remedial investigation.

One surface soil sample per acre of the Site will be collected on average in the areas of vegetative cover. The total number of surface soil samples will depend on the size of specific areas addressed during the investigation phases. More frequent surface soil sampling locations may be proposed for the subsequent phases of investigation if contaminants of potential concern (COPCs) are identified in the surface soil at concentrations exceeding the human health standards.

Stainless steel spoons or trowels, or disposable sampling instruments will be used to collect each surface soil sample from the upper 2 inches beneath vegetative cover as per DER-10 requirements for assessing human and ecological resource exposure to soil. An approximate area of 1 square foot will be sampled. The exposed soil will be screened for volatile organic compounds (VOCs) using a photoionization detector (PID). Each surface soil sample will be sampled for the following list of COPCs:

. Semivolatile organic compounds (SVOCs) by USEPA method 8270C . Target Analyte List (TAL) metals by USEPA method 6000/ 7000 series . Polychlorinated biphenyls (PCBs) by USEPA method 8082 . Free cyanide by USEPA method 9016 . Hexavalent chromium by USEPA method 3060A/7196 . Total organic carbon (TOC) by Lloyd Kahn method . Herbicides by USEPA Method 8151A . Pesticides by USEPA Method 8081A.

The soil will be homogenized in a stainless steel bowl prior to being placed in laboratory- provided sample containers.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Each sampling implement will be decontaminated in accordance with decontamination procedures described in the FSP. QA/QC samples will include blind duplicate soil samples, MS/MSD samples, and equipment rinsate blank samples. The QC samples will be completed at a frequency of 1/20 or once per week of sampling. An approved NYSDOH ELAP laboratory will perform the analyses.

3.2.3 Test Pit Excavation and Soil Sampling

Test pit excavation is planned in Phase 1 of the remedial investigation.

Test pits are proposed to assess the configuration and contents of buried structures which may be present and to assess whether such buried structures, pipes, and utility lines affect potential contaminant distribution. At least three test pits (GPEC-TP200 through GPEC-TP202) will be installed in Area 1 and Area 2 during Phase 1 of the RI (see Plate 3).

At the location of some larger structures, test pits may be dug as trenches or additional test pits may be excavated to assess the extent, configuration, and visual contents. Decisions to conduct additional test pits will be made in the field and be dependent upon actual subsurface conditions encountered. For example, a single test pit combined with the surface manifestation of the foundation may be enough to assess the size, construction, and contents of a former gas holder. Alternatively, several test pits or a trench may be required to better assess the extent and configuration of buried structures.

Due to the nature of the Site and the large number of active and retired utilities present in the subsurface, up to two locations may be pre-cleared to 8 ft bgs within planned test pits at select locations as described in the Section 3.2.1 above.

Each test pit will be photographed and logged by the field representative during the intrusive utility clearance and excavation. All material removed from the test pit will be placed on 20-mil high-density polyethylene (HDPE) sheeting. Odor-suppressing foam and/or other appropriate means to mitigate odor (e.g. plastic sheeting) will be provided by the contractor to control odor emissions that may result from excavating potentially impacted soils. Test pits will be terminated at the approximate groundwater table, refusal, or a maximum depth of 10 ft bgs. Field screening of soils for total organic vapors will be conducted with a PID from the ground surface during ground-intrusive activities. A minimum of one soil sample will be selected for chemical analysis per 10 linear ft of each test pit. Samples will be selected from the area exhibiting the most prominent signs of apparent contamination. If no impacts are observed, a sample will be collected from the bottom of the test pit. Each sample will be analyzed for the following:

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

. VOCs by the USEPA method 8260B . SVOCs by USEPA method 8270C . TAL metals by USEPA method 6000/ 7000 series . PCBs by USEPA method 8082 . Free cyanide by USEPA method 9016 . Hexavalent chromium by USEPA method 3060A/7196 . Total organic carbon by Lloyd Kahn method.

If NAPL or NAPL-saturated soil is encountered, samples may be collected for hydrocarbon characterization by analytical methods described in Section 3.2.9.

After the completion of each test pit, the test pit will be backfilled in reverse sequence in which it was excavated, so that materials removed from the bottom of the test pit are placed back at the bottom and materials removed from the top of the test pit are placed back at the top. The test pits will be backfilled in lifts and compacted using the back-hoe bucket. Excess soils will be containerized in a lined roll-off which will be characterized for reuse or disposal. If test pits are excavated in paved areas, the pavement will be restored.

QA/QC samples will include blind duplicate soil samples, MS/MSD samples, and equipment rinsate blank samples. The quality control samples will be completed at a frequency of 1/20 or once per week of sampling. A NYSDOH ELAP certified laboratory will perform the analyses. One trip blank will be included per shipment of soil samples to the laboratory.

3.2.4 Soil Borings Advancement and Soil Sampling

Soil borings advancement and soil sampling is planned in Phase 1 of the remedial investigation.

Thirty borings are planned to be installed during Phase 1 of the RI at twenty locations (GPEC- SB203 through GPEC-SB222) using rotary sonic (sonic) drilling methods as described below. Borings proposed to be installed along the bulkhead between the primary and secondary containment of LNG Tank No. 1 (GPEC-SB210 through GPEC-SB212) may be difficult to access with drilling equipment with sufficient capacity to advance to the target depths. Also, rip- rap that is identified in the bulkhead design drawings in this area may further limit drilling advancement. As such, as discussed during the site meeting with NYSDEC on February 21, 2012, the target depth of these borings may not be reached.

Borings installed in locations GPEC-SB217 through GPEC-SB222 will be completed as monitoring well clusters (deep, intermediate, shallow). In such a case only the deepest boring will be logged continuously in accordance with the FSP. The monitoring well program is further described in Section 3.2.5. Soil boring and monitoring well locations are shown in Plate 3. Table 1 provides sample description, rationale, and analysis for each boring.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

The soil borings will be advanced to at least El.-60 (approximately 70 ft bgs in Areas 1 and 2), which is below the initial zone of NAPL-saturated sediment observed near the bulkhead, subject to limitations described above. Two of the monitoring well clusters will be installed in the northwest area of the Site that is approximately 50 ft higher in elevation. The deepest boring in the cluster will be installed to approximately El. -100 to target the deep groundwater zone.

If impacts are observed at the target termination depth of a boring, the boring will be advanced to at least 10 ft below the deepest NAPL-saturated soil observed in the boring, based on field screening described in the FSP. Upon completion, the borings will be tremie grouted to the ground surface using a cement/bentonite slurry mixture.

Up to three soil samples per boring will be selected for chemical analysis at the following depth intervals:

. Within the Utility Clearance Interval (0 to 8 ft bgs): from the depth interval indicating highest level of impact based on field observations (odors, staining, PID, etc.). If no impacts are observed then a soil sample will be collected at 5 ft bgs. Samples will be used to evaluate potential exposure for utility workers as well as to evaluate whether soil is acceptable for reuse at the Site. . Below Utility Clearance Interval to Termination Depth (below 8 ft bgs): from the depth interval indicating highest level of contamination based on field observations (odors, staining, PID, etc.), soil samples will be used to determine the contaminant concentration within potentially impacted zones. If no impacts are observed, then a sample will be collected from the depth of the observed groundwater table. . The Boring Termination Depth.

Samples collected during utility clearance will be collected from the sidewall of the hole using stainless steel spoons, hand auger, or disposable sampling equipment. Each sample will be analyzed for the following COPCs:

. VOCs by the USEPA method 8260B . SVOCs by USEPA method 8270C . TAL metals by USEPA method 6000/ 7000 series; . PCBs by USEPA method 8082. . Free cyanide by USEPA method 9016 . Hexavalent chromium by USEPA method 3060A/7196 . Total organic carbon by Lloyd Kahn method.

The 0 to 8 ft bgs sample interval will be additionally analyzed for pesticides by USEPA Method 8081A and herbicides by USEPA Method 8151A for the purpose of human health risk assessment (HHRA) for utility workers.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

If NAPL or NAPL-saturated soil is encountered, samples may be collected for hydrocarbon characterization by the methods listed below. Additional samples may be collected and analyzed to evaluate areal extent of NAPL-saturated soil, and to identify co-mingled or non-MGP related impacts. Up to 40 samples will be selected for hydrocarbon characterization for the RI program, of which up to 10 samples are proposed for Phase 1 of the RI. These samples will be analyzed for the following, consistent with analyses conducted on Newtown Creek sediment samples

. PAHs and alkyl PAHs by USEPA Method 8270C using Selective Ion Monitoring (SIM) . N-alkanes and isoprenoids including DRO and TPH ranges by USEPA Method 8100.

Each sampling device will be decontaminated in accordance with decontamination procedures described in the FSP. QA/QC samples will include blind duplicate soil samples, MS/MSD samples, and equipment rinsate blank samples. The quality control samples will be completed at a frequency of 1 per 20 samples. An approved NYSDOH ELAP registered laboratory will perform the analyses. One trip blank will be included per shipment of samples to the laboratory.

3.2.5 Monitoring Well Installation

Monitoring well installation is planned in Phase 1 of the remedial investigation.

Six clusters of monitoring wells are planned to be installed during Phase 1 of the RI (GPEC- SB217 through GPEC-SB222) to provide input to the groundwater model and to assess groundwater conditions at the Site. Two of these locations (GPEC-SB218 and GPEC-SB221) already have a shallow monitoring well in place. Each cluster will have a shallow (groundwater table depth), intermediate (40-70 ft bgs) and deep monitoring well (100-120 ft bgs, or to intersect the aquitard at approximately El.-90). Additionally, up to 10 boring locations in Areas 1 and 2 may be finished as monitoring wells if NAPL-saturated soil intervals are encountered during the field investigation. The proposed monitoring well locations for Phase 1 are shown on Plate 3, and sample descriptions, rationale, and analysis are presented in Table 1.

Groundwater monitoring wells will be installed using sonic drilling techniques. The shallow wells will be screened in the uppermost portion of the water table aquifer and the well screen will extend approximately 3 ft above the existing water table. The screen lengths will be 10 ft unless NAPL-saturated soil indicates the potential for recoverable product; in such cases, the well screen may be extended as a function of the saturated zone. If DNAPL, or potential DNAPL, is encountered in any of the wells, a 5-ft sump will be added to the well installed on top of any observed confining layer or change in aquifer material grain size that may be retarding the vertical migration of DNAPL. In such a case a NAPL assessment will be conducted as described in Section 3.2.9 below.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

3.2.6 Monitoring Well Development

Monitoring well development is planned in Phase 1 of the remedial investigation.

Each newly-installed monitoring well will be developed by alternatively surging and pumping until the turbidity is less than 50 nephelometric turbidity units (NTUs) for a maximum of 1 hour or until a maximum of 10 well volumes of water have been removed. A field turbidity meter will be used to monitor the NTU levels. Well development will be completed in general accordance with the FSP. Purged ground water will be containerized in 55-gallon USDOT drums or fractionation tank and will be disposed of by National Grid at an approved facility.

3.2.7 Groundwater Sampling

Groundwater sampling is planned in Phase 1 of the remedial investigation.

Each of the newly installed monitoring wells will be sampled after a minimum of 2 weeks following completion of well development. A round of groundwater sampling is also proposed for the existing wells representative of the localized groundwater conditions at the Site. Prior to sampling, two synoptic rounds of groundwater level measurements will be recorded for all on- site monitoring wells (newly-installed and pre-existing) and the existing surface water measuring point in the Newtown Creek; ground water will be gauged at both the low tide and high tidal levels. The existing monitoring well locations are shown in Plate 2, the proposed monitoring well locations for Phase 1 are shown on Plate 3, and the descriptions, rationale, and analysis are presented in Table 1.

Monitoring wells will be purged and sampled using low flow groundwater sampling procedures and in accordance with the FSP. Each groundwater sample will be analyzed for the following COPCs:

. VOCs by USEPA method 8260B . SVOCs by USEPA method 8270C . TAL metals by USEPA method 6000/7000 series . PCBs by USEPA method 8082 . Total cyanide by USEPA Method 9012B . Free cyanide by USEPA method 9016 . Pesticides by USEPA Method 8081A . Herbicides by USEPA Method 8151A.

If NAPL accumulation is present in any well, then no groundwater sample will be collected for laboratory analysis.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

QA/QC procedures are detailed within the QAPP. QA/QC samples include blind duplicate samples, MS/MSD samples, and equipment rinsate blank samples. The quality control samples will be completed on a frequency of 1 per 20 samples. An NYSDOH- approved ELAP laboratory will perform the analyses. One trip blank will be included per shipment of samples to the laboratory.

3.2.8 Hydraulic Conductivity Test

Hydraulic conductivity testing is planned in Phase 1 of the remedial investigation.

In-situ hydraulic conductivity tests (slug tests) will be completed at six monitoring well clusters to determine site-specific hydraulic conductivity of the targeted aquifer and different subsurface strata. The slug tests will be completed in accordance with the FSP. Hydraulic conductivity values will be calculated using the Bouwer and Rice Method (1976).

3.2.9 NAPL Assessment

If NAPL is encountered a NAPL assessment is planned in Phase 1 of the remedial investigation.

If potentially free-phase NAPL is observed in any of the borings during the RI, various additional procedures will be implemented. The boring will be extended to a minimum of 10 ft beyond the deepest observed impact. If DNAPL is observed above a stratigraphic change in the formation or potential confining layer in a boring, a 7 or 8-inch outer casing will be advanced to isolate the contaminated zone. The outer casing will be temporarily seated in a 5-ft thick column of bentonite slurry or a minimum of 5 ft into the confining unit. The bentonite slurry will be used to prevent potential downward migration of contamination along the walls of the casing. The above approach is specific to sonic drilling techniques. If other drilling equipment is used alternative methods will be required.

Once the outer casing has been seated in the bentonite, drilling will continue below the outer casing. After collection of each core, a 6-inch casing will be advanced to case the boring below the bottom of the outer casing. After completing each boring, the 6-inch casing will be removed incrementally as the boring is grouted. If outer isolation casing is used, and the grout has reached the bottom depth of the outer casing, the 6-inch casing will be completely removed. Grouting will then proceed with incremental removal of the outer casing. Drilling methods and procedures are further described in the FSP.

A monitoring well may also be installed and screened across the DNAPL-impacted zone to monitor for accumulating product. If monitoring wells are installed per the above discussion, the wells may be constructed of 4-inch diameter stainless steel with 20 or 30 screen slot size and a 5- ft sump. The actual screen slot size will be selected based on the grain size distribution of the formation.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

All wells potentially containing NAPL based on boring observations will be gauged using an oil/water interface probe. If measurable NAPL is observed, then the NAPL will be bailed or pumped from the well and the volume of material removed will be recorded. All NAPL removed from a well will be containerized for disposal.

The recovery rate of the NAPL will be assessed through periodic measurements with an oil/water interface probe. Recovered NAPL will be examined and described by the field representative. If present, up to three samples of NAPL will be collected and analyzed for waste characterization purposes, and to determine the density and viscosity of the NAPL.

Up to 10 samples may be collected for hydrocarbon characterization during Phase 1 of the RI for hydrocarbon characterization by the following methods:

. PAHs and alkyl PAHs by USEPA Method 8270C using Selective Ion Monitoring (SIM) . N-alkanes and isoprenoids including DRO and TPH ranges by USEPA Method 8100.

3.2.10 Soil Vapor Intrusion Investigation

A soil vapor intrusion investigation is not planned in Phase 1 of the remedial investigation.

Screening of soil vapor is proposed for nine buildings (five large and four small) located at the Site based on their occupancy for 8 hours or more during the work week and proximity to potentially contaminated areas. The proposed investigation will include 28 soil vapor samples, 28 indoor air samples, and 9 outdoor ambient air samples. The indoor air samples will be used to assess the potential for soil vapor intrusion into the buildings. The outdoor samples will be used to determine background air quality.

Each soil vapor point will be installed and sampled in general accordance with the NYSDOH “Guidance for Evaluating Soil Vapor Intrusion in the State of New York” and National Grid’s “Draft Standard Operating Procedures for Soil Vapor Intrusion Evaluations at National Grid MGP Sites in New York State.”

Soil vapor points will be installed within building interiors as permanent sub-slab soil vapor points. Sub-slab soil vapor points will be installed by drilling a hole through the concrete floor slab and then fitting the point with Teflon or stainless steel tubing secured with stainless steel fittings and cap. Each sub-slab soil sample port will be sealed with non-shrinking grout or beeswax and completed with a flush-mount utility cover. Temporary sub-slab soil vapor sample points may be installed instead of permanent ones at some locations if directed by the facility/building manager.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

To ensure that the sampling tube is sealed from the ambient air aboveground, helium will be used as a tracer gas as described in the NYSDOH Soil Vapor Intrusion Guidance document.

The indoor and outdoor air samples will be collected from the approximate breathing height (3 to 5 ft aboveground). Each indoor air and outdoor air sample will be collected using an individually certified 6-liter SUMMA® canister with a laboratory-supplied flow controller that is calibrated to an 8-hour period. The regulator flow rate will not exceed 0.2 (L/min).

Each SUMMA® canister will be shipped to an approved-NYSDOH ELAP registered laboratory for analysis. The sample will be analyzed for VOCs and naphthalene by the USEPA Method TO-15. The soil vapor sampling will target the winter heating season between November 15 and March 30 in accordance with the NYSDOH Soil Vapor Guidance document.

QA/QC procedures are detailed in the QAPP. QA/QC samples will include one blind duplicate sample collected for both ambient air and soil vapor. An approved NYSDOH ELAP registered laboratory will perform the analyses.

Building inventory information will also be collected in general accordance with the NYSDOH Center of Environmental Health’s Indoor Air Quality Questionnaire and Building Form that is provided as Appendix B of the NYSDOH “Guidance for Evaluating Soil Vapor Intrusion in the State of New York” and NGRID’s “Draft Standard Operating Procedure- Soil Vapor Intrusion for MGP Sites in New York”.

3.2.11 Community and Work Zone Air Monitoring

In accordance with NYSDEC and NYSDOH requirements, a CAMP will be implemented at the Site during each phase of the intrusive field activities. The objective of the CAMP is to provide a measure of protection for the downwind community (i.e., off-site receptors, including residences and businesses and on-site workers) from potential airborne contaminant releases as a direct result of intrusive RI activities. Air monitoring stations will be located upwind and downwind of each intrusive work area (i.e., boring and test pit locations). VOCs and particulate matter less than 10 micrometers in size (PM-10) will be monitored at the up-wind and downwind stations on a continuous basis. Wind direction will be determined using a wind sock(s) and/or flagging poles installed on site.

GEI will provide the following equipment for GEI employees’ work zone monitoring:

. PID with 10.6 eV lamp or equivalent for total VOC monitoring; . Dust Meter for PM-10 monitoring; and . Combustible Gas Indicator (CGI) /Oxygen (O2) / H2S / HCN meter.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

GEI will monitor and document daily site conditions and operations and inform field staff of results. If action levels are exceeded, GEI’s field representative will immediately implement actions outlined in the site-specific HASP and will notify GEI’s Project Manager and the site safety officer.

The proposed CAMP is presented in Appendix F.

3.2.12 Decontamination and Management of Investigation-Derived Waste

Prior to commencing intrusive activities, an equipment decontamination area will be selected during a preliminary site visit and a decontamination pad will be constructed. A waste storage pad for IDW is already in place adjacent to GEI’s trailer near Varick Street. The pad will be inspected and upgraded as appropriate upon mobilization to the Site.

Drilling equipment will be decontaminated at the established decontamination pad between each boring location in accordance with the FSP. Sampling equipment used for sample collection (e.g., stainless steel split spoons, sample spoons, and hand trowels) will be decontaminated prior to use and reuse.

Soil cuttings and wastewaters produced during decontamination will be collected and contained within 55-gallon USDOT drums, roll-off containers or fractionation tank. A waste profile sample of soil and fluid IDW will be collected to characterize the wastes to determine the appropriate disposal options available. Samples will be collected into laboratory-preserved bottles, chilled with ice, and submitted to the laboratory under chain of custody as described in the FSP, and QAPP. Each disposal sample media will be sampled for parameters to meet the requirements of the disposal facilities approved by National Grid. National Grid will arrange for the ongoing disposal of the IDW after they have been characterized.

3.2.13 Survey of Sampling Points

Following completion of the soil borings, monitoring wells, and test pits and collection of the surface-soil samples, each of these points will be surveyed by a New York State Licensed Land Surveyor. The vertical and horizontal position of soil sampling locations and monitoring wells will be determined to ±0.02 ft. All locations and elevations will be referenced to the New York State Plane Eastern Zone (3104) North American Datum 1983 (NAD83) and the North American Vertical Datum (NAVD88).

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

3.3 Step I Fish and Wildlife Impact Analysis

A Step I Fish and Wildlife Impact Analysis is not planned in Phase 1 of the remedial investigation.

A Step I Fish and Wildlife Impact Analysis (FWIA) will be completed for the Site. The Step I analysis will be conducted in accordance with DER-10 Section 3.10 and the current version of NYSDEC’s Fish and Wildlife Impact Analysis for Inactive Hazardous Waste Sites (FWIA). The general objectives of the Step I assessment are:

. Identify the fish and wildlife resources, habitats, cover type, wetland and stream classifications at the Site and in the vicinity . Identify the fauna expected within each cover type and aquatic habitat . Document observations of stress to the Site soils and vegetation . Describe the value of habitat to expected fauna . Describe the value of the fish and wildlife resources to humans . Determine whether contaminants are present that potentially could affect the expected fish and wildlife resources . Recommend whether a Step II FWIA is warranted.

The findings of the Step I FWIA will be included in the final RI Report.

3.4 Qualitative Human Health Risk Assessment

A Qualitative Human Health Risk Assessment is not planned in Phase 1 of the remedial investigation.

In accordance with direction provided by the NYSDEC, a qualitative human health risk assessment will be prepared for the Final Remedial Investigation Report. This assessment will follow the guidelines provided in the Appendix 3B to NYSDEC’s DER-10 Technical Guidance for Site Investigation and Remediation, dated May 2010. The assessment will identify the exposure setting, identify exposure pathways, and will evaluate the fate and transport of the contaminants. The assessment will include text discussions, tables, and graphics depicting the potential exposure pathways. The characterization will include all environmental data gathered pertaining to the RI. The qualitative assessment will identify potential risks for specific potential receptors based on complete pathways of exposure to contaminant levels exceeding default “screening criteria,” such as the NYSDEC-recommended SCOs and drinking water standards.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

3.5 Quality Assurance/Quality Control and Data Validation

The NYSDOH ELAP-approved laboratory will provide New York State Category B data deliverables for the 20 percent of the samples. The data will be validated in accordance with the USEPA Region II Functional Guidelines for Evaluating Organic Analyses (September 2006) and the USEPA Region 2 Standard Operating Procedure for the Evaluation of Metals for the Contract Laboratory Program, SOP HW-2, Revision 13 (September 2006), modified as necessary to accommodate the non-Contract Laboratory Program (CLP) methodologies used. Data usability summary reports (DUSRs) will be prepared for all of the samples. The DUSRs will summarize any laboratory quality control non-conformances and their impact on the usability of the data. The DUSR will be used in preparing the RI report, and will be submitted as part of the RI report.

For the 80 percent of the samples that are not validated, a completeness check will be performed. This review will only check that samples requested on the chains of custody (COCs) were analyzed and if for any reason, the laboratory had to rerun or dilute these samples and submitted several results for one sample, the validator will choose the results to be reported. No evaluations or reviews will be done on the quality control (QC) results for the Category B package samples.

Through the use of standardized sample collection and decontamination procedures, the quality of the samples during field collection can be assured. This will be reviewed in the data validation process through the evaluation of field duplicate pair precision and equipment rinsate and trip blank samples, respectively.

The data validation process will ensure that the data collected and reported by the laboratory are complete and of sufficient quality that management decisions regarding the degree and extent of potential impacts can be reliably made. The data validation will evaluate whether the required quantitation limits have been achieved for each sample analyzed. Laboratory and field precision will be evaluated through the review of laboratory and field duplicate results and MS/MSD precision. Accuracy will be evaluated through the review of holding times, calibration results, MS/MSD, surrogate, and LCS recoveries, laboratory and field blank results, and internal standard results. Any deviations from the required level of sample quality will be detailed in the DUSR and these deviations will be taken into consideration when using the data to explain Site conditions.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

4. RI Report Preparation

GEI will prepare a RI report for submittal to the NYSDEC for the Site at the completion of all phases of the investigation. The report will incorporate the findings of the RI activities. The information will be used to describe the nature and extent, and fate and transport of all contaminants associated with the former MGP site. The report will identify specific contaminant concentrations throughout each media (e.g., soil, groundwater, etc.), which is necessary to determine whether any media require remediation or further evaluation. The reports will also incorporate the findings of the Step I FWIA and the Qualitative Human Health Risk Assessment.

Key components of the RI report will include:

. Description of RI activities . Discussion of Site geology and groundwater flow patterns . Distribution of analytical compounds in soil and groundwater . Distribution of NAPL . Identification of historical structures and associated waste source areas . Comparison of Site soil and groundwater analytical data to NYSDEC standards . Identification of areas that exceed the soil and groundwater standards . Boring logs, test pit logs, and monitoring well construction details . Data usability summary reports . Validated laboratory Form I reports . Site photographs.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

5. Schedule

A tentative project schedule proposed for the RI implementation and RI report preparation is presented below:

. RI Phase 1: Q3 2012 through Q2 2013 . RI Phase 2: Q3 2013 through Q2 2014 . RI Phase 3: Q3 2014 through Q2 2015 . RI Report Preparation: Q3 2015 through Q2 2016.

A detailed schedule for Phase 1 will be established upon the approval of this work plan and prior to commencing RI field activities. National Grid will notify the NYSDEC 5 working days prior to the anticipated start date of field activities for the remedial investigation program.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

6. Project Team

GEI’s key project members and their roles are summarized below.

. Program Manager. Mr. David Terry will have ultimate responsibility for completion of the work scope. He will interface with National Grid as needed, and will be responsible for providing appropriate staff and resources to complete the project.

. Project Manager. Mr. Michael Zukauskas, P.E. will have the day-to-day responsibility for project logistics, and coordination with the National Grid and the NYSDEC. He will be responsible for the deliverables and quality control.

. In-House Consultants. Mr. John Ripp will serve as GEI’s in-house consultants for the project team. He has extensive MGP experience and understanding of MGP historical operations, and the behavior of MGP contaminants in the environment.

. Lead Engineer. Under the direction of Mr. Zukauskas, P.E., Ms. Maria Stepanova, P.E. will be primarily responsible for implementation of the field program, managing GEI’s subcontractors, interpretation of the investigation findings, and preparation of the RI report.

An organization chart is provided in Appendix G.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

7. References

AECOM Corporation (2009) ”Remedial Investigation Work Plan. Equity Former Manufactured Gas Plant.” Prepared for National Grid

Aerial Photographs of National Grid – Greenpoint, Brooklyn, NY provided by Environmental Research Inc., Linden, VA; years 1943, 1949, 1957, 1959, 1961, 1964, 1965, 1966, 1974, 1975, 1977, 1980 and 2008

Anchor Environmental (2007) “Draft Remedial Investigation report, Operable Unit 6, Laurel Hill Site, Maspeth, New York,” Prepared for Phelps Dodge Refining Corporation, May 2007.

Anchor QEA (2011) “Data Collection Plan. Remedial Investigation/Feasibility Study, Newtown Creek.” October 2011.

Brooklyn Union Gas (1979) Memo about BUG Naphtha Study Boring Results, March 6.

Brooklyn Union Gas Company (1926) Report to the Public Service Commission of the State of New York for the Year ended December 31, 1926.

Brooklyn Union Gas Company (multiple) Report to the State of New York, Department of Public Service, Public Service Commission for the Year ended December 31, 19--; years 1927 through 1988

Buxbaum R. (2011) Peter Cooper, Citizen Industrialist: a Biography Timeline. http://www.rebresearch.com/Cooper/petercooper.html

Caldwell D (1989) “Surficial Geologic Map of New York, Lower Hudson Sheet.” The State Education Department, University of the State of New York, 1989.

Cowardin L.M., et al (1979) “Classification of Wetlands and Deepwater Habitats of the United States.” U.S. Fish and Wildlife Service.

EEA, Inc. (2004) “Phase II Environmental Subsurface Investigation, Property Located at 254 Maspeth Avenue, Brooklyn, New York.” Prepared for Spencer Realty Corporation and Copper Tank and Welding, October 26.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Fanning, Phillips and Molnar (1993) “Field Reports for the Underground Storage Tank Area Groundwater Investigation at the Brooklyn Union Gas Company, Greenpoint Facility.” Prepared for the Brooklyn Union Gas Company, December 7.

Fanning, Phillips and Molnar (1993) “Installation of Groundwater Monitoring Wells at Transportation Building Southwest Corner Underground Storage Tank Area, Greenpoint Facility, Brooklyn, New York” (proposal). Prepared for Brooklyn Union Gas Company, September 21.

Fanning, Phillips and Molnar (1995) “Field Reports for the Underground Storage Tank Area Groundwater Investigation at the Brooklyn Union Gas Company, Greenpoint Facility.” Prepared for the Brooklyn Union Gas Company, February 27.

Gannet Fleming Engineers, P.C.(2004) “Phase I Environmental Site Assessment Report for 254 Maspeth Avenue Property.” Prepared for Cooper Tank and Welding Corp., November 5.

Gannet Fleming Engineers, P.C. (2005) “Phase II Environmental Site Investigation Summary.” Prepared for Cooper Tank and Welding Corp., May 12.

Gannet Fleming Engineers, P.C. (2006) Sheet 1: Proposed Soil Boring Location Plan. Non Putrescible Solid Waste Transfer Station. Prepared for Cooper Tank and Welding Corp., April 2006. GEI Consultants (2009) ”Pre-Design Investigation Work Plan.” Prepared for National Grid, January 9.

GEI Consultants (2010) ”Supplemental Pre-Design Investigation Work Plan.” Prepared for National Grid, April 8.

GEI Consultants (2010) “Assessment of Human Health Risk, Greenpoint Energy Center Baseball Field.” Prepared for National Grid, December 1.

Geraghty and Miller, Inc (1979) “Investigation of Underground Accumulation of Hydrocarbons along Newtown Creek, Brooklyn, New York.” Prepared for the U.S. Coast Guard, July 1979.

Groundwater Technology (1995) “Brooklyn Union Greenpoint Facility UST Abandonment Report.” A Letter Response to NYSDEC, May 15.

HabitatMap (2012). Meeker Ave PCE/TCE Plume Map. Accesses April 30, 2012. http://habitatmap.org/habitatmap_docs/MeekerAvePCETCEPlume.pdf

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Lexicon Environmental Associates (1993) “Underground Storage Tank Closures, Brooklyn Union Gas Greenpoint Service Center, Brooklyn, New York.” Prepared for Brooklyn Union Gas, October 18.

Miller Environmental Group (2002) Soil Sample Results (analytical laboratory results), December 5.

Miller Environmental Group (2003) “Preliminary Subsurface Investigation at the Greenpoint Operation Center.” Letter Report, January 10.

New York City Department of City Planning (2011) Zoning Maps (accessed July 22, 2011) http://www.nyc.gov/html/dcp/pdf/zone/map13a.pdf

National Grid “Draft Standard Operating Procedures for Soil Vapor Intrusion Evaluations at National Grid MGP sites in New York State.”

NYSDEC (2010) Response to FOIL Request No. 10-163, Completion Report - Long Island Well K3504.

NYSDEC (2010) “DER-10: Technical Guidance for Site Investigation and Remediation.” May 2010 Edition.

NYSDEC (2012) Spill Incidents Database Search. Accessed February 10 and April 30, 2012. http://www.dec.ny.gov/cfmx/extapps/derexternal/index.cfm?pageid=2

NYSDEC (2012) Greenpoint Petroleum Remediation Project. Project Status. Accesses on April 30, 2012. http://nysdecgreenpoint.com/

NYSDOH “Final Guidance for Evaluating Soil Vapor Intrusion in the State of New York”

Paulus, Sokolowski and Sartor Engineering (2001) Proposal and correspondence regarding the Maspeth Gas Holders Implosion and subsequent Former Greenpoint Compressor Station Remediation and Dismantling. Prepared for KeySpan, 2004

Paulus, Sokolowski and Sartor Engineering (2004) “DRAFT Preliminary Site Investigation Report for the Greenpoint Energy Center proposed Liquefaction Plant Replacement Area, Brooklyn, New York.” Prepared for KeySpan, June 2004.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

Paulus, Sokolowski and Sartor Engineering (2006) “IRM Completion Report for the Greenpoint Energy Center Northeast Corner, Greenpoint, Brooklyn, NY.” Prepared for KeySpan, June 2006.

Paulus, Sokolowski and Sartor Engineering (2009) “Final Supplemental Site Investigation/Supplemental Interim Remedial Measure Completion Report.” Prepared for National Grid, November 2009.

Roux Associates, Inc (1990) “Ground-Water Contingency Plan for the Brooklyn Union Gas Company Petroleum Bulk Storage Facility.” Prepared for Brooklyn Union Gas. August 27, 1990.

Sanborn Fire Insurance Maps of Greenpoint Energy Center, Brooklyn, NY provided by Environmental Data Resources; years 1888, 1907, 1933, 1951, 1965, 1968 and 1972.

URS Corporation (2008) “Site Characterization, Soil Vapor Intrusion Data Summary Report, February-March 2008, Meeker Avenue Plum Trackdown Greenpoint/Williamsburg Industrial Area.” Prepared for NYSDEC, June 2008.

URS Corporation (2009) “Site Characterization, Phase IV Data summary Report, Meeker Avenue Plum Trackdown Greenpoint/Williamsburg Industrial Area.” Prepared for NYSDEC, May 2009.

URS Corporation (2009) “Site Characterization, Phase V Data summary Report, Meeker Avenue Plum Trackdown Greenpoint/Williamsburg Industrial Area.” Prepared for NYSDEC, October 2009.

US Environmental Protection Agency (2007) “Newtown Creek/Greenpoint Oil Spill Study.”

US Environmental Protection Agency (2006) “Region II Functional Guidelines for Evaluating Organic Analyses.” September 2006.

US Environmental Protection Agency (2006) “Region II Standard Operating Procedure for the Evaluation of Metals for the Contract Laboratory Program.” SOP, HW-2, Revision 13, September 2006.

US Geological Survey (1986) “Thickness and Hydrogeology of Aquifers and Confining Units Below the Upper Glacial Aquifer on Long Island, New York.” J. Soren and D. Simmons, USGS Publication 86-4175.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 12, 2012

US Geological Survey (1986) “Water Table of the Upper Glacial Aquifer on Western Long Island, New York, in March-April 1997.” R. Busciolano et al. 1997.

Vanasse Hangen Brustlin, Inc. (2001) “Maspeth Holder Demolition Environmental Impact Report.” Prepared for KeySpan Corporation, September, 2001.

REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 1 2 , 2012

Tables

Proposed Sample Descriptions, Rationale and Analysis

Table 1 Proposed Sample Descriptions, Rationale and Analysis Remedial Investigation Work Plan Greenpoint Energy Center Former Manufactured Gas Plant Site

Number of Samples 1

Sample I.D. Sample Area Sample Location Sample Rationale (EPA PCBs VOCs SVOCs Groundwa Carbon Cyanide

Soil Pesticides 3060/7196) Chromium Herbicides Herbicides (EPA 8082) (EPA (EPA 8260) (EPA 8270) (EPA Hexavalent Hexavalent TAL Metals Metals TAL (6000/7000) (EPA 8151A) (EPA (EPA 8081A) (EPA ter (Lloyd Kahn) Total Organic

Soil boring to approximately 70 ft bgs (El.-60) to evaluate potential DNAPL MW-1 area of the GPEC-SB-203 Area 1 presence near monitoring well MW-1. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate potential DNAPL MW-1 area of the GPEC-SB-204 Area 1 presence near monitoring well MW-1. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate potential DNAPL MW-1 area of the GPEC-SB-205 Area 1 presence near monitoring well MW-1. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-206 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-207 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-208 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-209 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-210 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-211 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-212 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-213 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-214 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-215 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. Soil boring to approximately 70 ft bgs (El.-60) to evaluate subsurface soil Bulkhead area of the GPEC-SB-216 Area 2 conditions along the bulkhead. Monitoring well to be installed if it is Up to 3 1 X X X X X X2 X2 X3 X3 GPEC. determined that DNAPL recovery is possible. North-East part of the Soil boring to approximately 85 ft bgs (El.-60) to evaluate the subsurface GPEC-SB-217 Site near LNG Plant, LNG Area soil conditions. Complete the cluster of monitoring wells to delineate Up to 3 3 X X X X X X2 X2 X3 X3 /GPEC-MW vicinity of former potential groundwater impacts and groundwater flow regime. Lagoon

H:\WPROC\Project\NationalGrid\Greenpoint\WORK PLANS\REMEDIAL INVESTIGATION\Phase 1\2012-06-05 FINAL_DEC\Table\ Page 1 of 2 Table 1 - Proposed Sample Rationale Analyses20120605 Table 1 Proposed Sample Descriptions, Rationale and Analysis Remedial Investigation Work Plan Greenpoint Energy Center Former Manufactured Gas Plant Site

Number of Samples 1

Sample I.D. Sample Area Sample Location Sample Rationale (EPA PCBs VOCs SVOCs Groundwa Carbon Cyanide

Near former 400,000- Soil boring to approximately 110 ft bgs (El.-60) to evaluate the subsurface GPEC-SB-218 gal Tar Tank, north of MW-13 area soil conditions. Complete the cluster of monitoring wells to delineate Up to 3 3 X X X X X X2 X2 X3 X3 /GPEC-MW the Site, to the right of potential groundwater impacts and groundwater flow regime. Varick Avenue South of Tank Field, Soil boring to approximately 105 ft bgs (El.-60) to evaluate the subsurface GPEC-SB-219 Tank Field near corner of Division soil conditions. Complete the cluster of monitoring wells to delineate Up to 3 3 X X X X X X2 X2 X3 X3 /GPEC-MW Pl and Porter Avenue potential groundwater impacts and groundwater flow regime.

Demolished Demolished Holder 2 Soil boring to approximately 75 ft bgs (El.-60) to evaluate the subsurface GPEC-SB-220 Maspeth area, near soil conditions. Complete the cluster of monitoring wells to delineate Up to 3 3 X X X X X X2 X2 X3 X3 /GPEC-MW Holders Vandervoort Avenue potential groundwater impacts and groundwater flow regime.

North of Storage Soil boring to approximately 75 ft bgs (El.-60) to evaluate the subsurface GPEC-SB-221 Near Storage building, to the right of soil conditions. Complete the cluster of monitoring wells to delineate Up to 3 3 X X X X X X2 X2 X3 X3 /GPEC-MW Building Varick Ave potential groundwater impacts and groundwater flow regime.

Demolished Demolished Holder 1 Soil boring to approximately 70 ft bgs (El.-60) to evaluate the subsurface GPEC-SB-222 Maspeth area, near Maspeth soil conditions. Complete the cluster of monitoring wells to delineate Up to 3 3 X X X X X X2 X2 X3 X3 /GPEC-MW Holders Avenue potential groundwater impacts and groundwater flow regime.

East of Stores GPEC-TP-200 Underground utilities Test pit to determine location of underground utilities. 1 NA X X X X X X2 X2 X3 X3 building

GPEC-TP-201 LNG Area Underground utilities Test pit to determine location of underground utilities. 1 NA X X X X X X2 X2 X3 X3 GPEC-TP-202 LNG Area Underground utilities Test pit to determine location of underground utilities. 1 NA X X X X X X2 X2 X3 X3 Notes: Additional investigation locations to be installed on as-needed basis. If impacts are observed at the target termination depth of a boring, the boring will be advanced to at least 10 ft below the deepest MGP-related contaminant observed in the boring, Each cluster will have a shallow (groundwater table depth), intermediate (40-70 ft bgs) and deep monitoring well (100-120 ft bgs, or to intersect the aquitard at approximately El.-90). Chemical analysis test methods specified are from U.S. EPA SW-846 test methods EPA - Environmental Protection Agency GPEC - Greenpoint Energy Center MGP - Manufactured Gas Plant PCB - Polychlorinated Biphenyls SVOCs - Semivolitile Organic Compounds TAL - Target Analyte List VOCs - Volatile Organic Compounds 1-Soils will be analyzed for Free Cyanide (EPA Method 9016) and water will be analyzed for both Free Cyanide (EPA Method 9016) and Total Cyanide (EPA Method 9012) 2-Soil samples from 0 to 8 ft bgs interval and all groundwater samples will be analyzed for these parameters 3-Only soil samples will be analysed for these parameters

H:\WPROC\Project\NationalGrid\Greenpoint\WORK PLANS\REMEDIAL INVESTIGATION\Phase 1\2012-06-05 FINAL_DEC\Table\ Page 2 of 2 Table 1 - Proposed Sample Rationale Analyses20120605 REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 1 2 , 2012

Figures

1. Site Location Map 2. Sensitive Areas within ½ Mile of Greenpoint Energy Center

Greenpoint Mgp

GREENPOINT FORMER MGP SITE

Consultants PROJECT 093260 June 2012 Figure 1

J:\Projects\National Grid\Greenpoint\Greenpoint Site Location Map-updated July 2011.ppt ¥£C ¥£C CALVARY ¥£C CGREENSTREET CEMETERY GENERAL HUMAN ¥£ VETERANS PARK PARK STRIP OUTREACH IN LAPROVIDENCIA FAMILY C (CAIRO) ¥£ C THE COMMUNITY HEALTH CTR@MANHATTAN ¥£ PARK AVENUE HEALTH CTR C ¥£GREENSTREET ¥£C ¥£CSTRIP BUILDERS FOR FAMILY & YOUTH CCKRAKUS ¥£CGREENSTREET ¥£¥£ PARK BUILDERS LUNCHEON CLUB GREENSTREET ¥£CSTRIP 1/2 MILE FOR FAMILY SENIOR CENTER ¥£C & YOUTH GREENSTRE¥£ECT ¥£CENGINE 238 LADDER 106 ¥£CGREENSTREET ¥£MCERC¥£CY ¥£CGREENSTREET HOME FOR CBFFY PETE CHILDREN ¥£ AMERICAN MCGUINESS CPLAYGROUND SENIOR CTR MAURICE ¥£ GREENSTREET PARK CMAURICE PARK ¥£C MAURICE PARK ¥£C¥£C ¥£CMAU¥£RICE MAURICE PARK C MAURICE GREENSTREET ¥£ PARK¥£C C PARK ¥£ MAURICE PS 31 SAMUEL GREENSTREET ¥£C ¥£C PARK C MAURICE F. DUPONT GREENSTREET ¥£ GREENSTREET MAURICE PARK C SCHCOOL ¥£C 94TH C ¥£ ¥£ PARK ¥£ GREENPOINT¥£C Y.M.C.A. GREENSTREET ¥£CPRECINCT ¥£C GREENPOINT NURSERY SCHOOL PS 34 OLIVER GREENSTREET LORIMER GREENPOINT¥£CH. PERRY ENERGY CENTER C LIBRARY ¥£ PREPARTORY SCHOOL ¥£C PARK SCHOO¥£CL ¥£CGREENSTREET STRCIP ¥£HOLY CROSS ¥£CGREENSTREET SCHOOL ¥£CGREENSTREET ¥£C ABC DAY MONSIGNOR CHILD CARE MCGOLRICK POLONIANS ORGANIZED CENTER PARK MINISTRY TO OUR C SGT WILLIAM COMMUNITY, INC C PS 110 ¥£ GREENSTREET ¥£ NEWTOWN DOUGHERTY ¥£C ¥£C MONITOR SAINT PLGD GREENSTREECT SCHOOL CREEK ¥£ STANISLAUS C JOHN ORAVECZ C ¥£ ¥£ MARTIN C KOSTKA SCHOOL CHILD CARE GREENSTREE¥£T ¥£C LUTHER HIGH CENTER GREENSTREECT ¥£ SCHOOL ¥£C GREENSTREET C ¥£C¥£C ST. STANISLAUS ¥£ PRECIOUS GREENSTREET CKOSTKA SCHOOL ¥£ MOM¥£ECNTS DAY C FIDELITY ¥£GREENSTREET CARE/PRESCHOOL AUTOMOTIVE MEMORIAL ¥£C HIGH SCHOOL GREENSTREET PARK ¥£C ¥£C ¥£C ¥£C GREENSTREET MCCARREN GREENSTREET PARK C GREENSTREET ¥£ GREENSTREET ¥£C ¥£CGREENSTREET ¥£C GREENSTRE¥£CE¥£CT GREENSTREET GREENSTREE¥£CT C BROOKLYN ¥£GREENSTREET DDSO MCCARREN WILLIAMSBURG PARK SAINT¥£C PARK C CHARTER ¥£ STRIP CECILIA C JHS 126 JOHN GREENSTREET ¥£ CHIGH SCHOOL C ¥£ ¥£ SCHOOL ERICSSON SCHOOLJHS ¥£C 126 PLAYGROUND ST. PRIVATE FRANK ENGINE 229 CECILIA WALTER GREENSTREET SONSIRE SCHOOL C LADDER 146 COOPER PARK REED ¥£ SQUARE C ¥£C ¥£ CHILD CARE CSCHOOL ¥£CCENTER ¥£ NORTHSIDE CATHOLIC COOPER SCHOOL AT SAINT HOUSES VINCENT DE PAUL BEDAME PLGD C SESSA ST. VINCE¥£NT BARBARA S. GREENSTREET BFFY NORTHSIDE CTRIANGLE PS 153 MASPETH DE PAUL ¥£ ¥£C KLEIMAN SENIOR CENTER SCHOOL FATHER SHELTER ELEMENTARY ¥£C NORTHSIDE HEARTSHARE GIORGIO ¥£C SCHOOL WILLIAMSBURG CATHOLIC SCHOOL RED SHED HUMAN SERVICES C SQUARE ¥£ OF NEW YORK NORTHSIDE PRESCHOOL AT MOUNT CARMELC AHRC @ GARDEN ¥£C ¥£C ¥£ ¥£C COOPER ¥£C WILLIAMSBURG CMT CARMEL SQUARE FRANCIS PARK ENGINE ¥£ OF PAOLA C 206 FOAM NORTHSIDE PRESCHOOL ¥£ WILLIAMSBURG ¥£CBUILDERS FOR C ¥£ UNIT 206 (I/T) FAMILY & YOUTH PS 17 HENRY D. PREP SCHOOL ¥£C CHARRY VAN MEMORIAL ¥£ COOPER WOODWORTH SCHOOL PS 132 THE ARSDALE HIGH SCHOOL ¥£C CONSELYEA GORE GORE GREENSTREET ¥£C ¥£C EARLY INTERVENTION ¥£C ¥£C ¥£C MS 577-CONSELYEA ¥£CGREENSTREET CENTER OF BROOKLYN GREENSTREE¥£CT ¥£C PREP SCHOOL CGREENSTREET MERCY HOME FOR CHILDCREN ¥£C ¥£ ¥£ MACRI GREENSTREET CATHOLIC CHARITIES SQUARE LEONARD SMALL WORLD NEIGHBORHOOD CLIBRARY ENGINE 291 ¥£ SERVICES, INC. JAIME CAMPIZ DAY CARE ¥£C C FRANCIS DEFALCO LADDER 140 PLAYGROUND CENTER ¥£C ¥£ CBUILDERS C ¥£C ¥£C ¥£ DENTAL CLINIC@FOR ¥£ SWINGING FOR FAMILY DISABLED PERSONS ST NICHOLAS-POWERCS & YOUTH 60S SENIOR ¥£C¥£ OUR LADY OF CENTER ST GARDEN GROVER THE MIRACULOUS C NUESTROS NINOS CDS ¥£ MEDAL SCHOOL EDWARD S. MULTI-FUNCTIONAL CLEVELAND @ WILLIAMSBURG WOODHULL MED C C ¥£ HIGH SCHOOL FAMILY ¥£ C LINTOL CLINIC C ¥£ ¥£ OUR DAY CARE & MENTAL HLTH LEGEND C SERVICES, INC. ¥£ C ST. JOHN/ LADY-MIRACULOUS ¥£ CTR@WOODHULL MISSION ASSEMBLY GROVER COMMUNITY AND DAMON HOUSE N EVANGELIST C MEDAL WILLIAMSBURG ¥£ PENTECOSTAL CLEVELAND PARENTS DAY LUTHERAN PS 71 Y - COMMUNITY ADULT HLTH CTR C C PARK PS 18 EDWARD ¥£ HIGH SCHOOL OF CAMELOT ¥£ FOREST CARE CENTER C PUBLIC FACILITIES RESID. ¥£ C BUSH SCHOOL ¥£ C ENTERPRISE, BUSINESS OF STATEN ¥£C C ¥£ SCHOOL RODNEY ¥£ & TECHNOLOGCY ISLAND,INC. ¥£C ST VINCENT'S ¥£ PLAYGROUND NORTH SERVICES, BUSHWICK UNITED/ TIDAL WETLANDS MARCY TEN EYCH RODNEY PLAYGROUND INC. GRAHAM STARR GREEN HOUSES C JACKIE JOHNSON CENTER ¥£ CHILD CARE C PLAYGROUND C HEAD START ¥£ ¥£ WOODHULL MEDICAL RESIDENTIAL C NORTH GREENSTREET HDFC CENTER C ¥£C ¥£ C C C & MENTAL HLTH ¥£ ¥£ RODNEY¥£ ¥£ ST. ATHANASIUS SCHOOL MARCY C ¥£C TEN EYCK ¥£ PS 319 CTR@I S 4C9 C JASA - TEN EYCH ¥£ CPARK ¥£ MIXED RESIDENTIAL & COMMERCIAL BUILDINGS GREEN¥£ PLAZA SOUTH HOUSES HDFC C WILLIAMSBURG CENTER C ¥£ C PS 196 ¥£ THELMA ¥£ C STAGG STREET ¥£C ¥£ MARTINEZ PLAYGROUND PLAYGROUND MAR¥£CY ¥£CLITHUANIA CENTER FOR C¥£C OPEN SPACE & OUTDOOR RECREATION GREEN SQUARE ¥£ C CHILDREN UNITED COMMUNITY PS 196 MARC¥£Y PS 196 SOCUTH ¥£ OF WILLIAMSBURG PLAYGROUND PARK C TEN EYCK PORTER SOUTH ¥£ NUESTROS DAY CARE CENTER SOURCESPE:SACH TIKVAH C SCHOOL AVENUE REMEDIAL INVESTIGATION WORKPLAN SENSITIVE AREAS WITHIN ¥£C NINOS C.D. ¥£ ¥£C COMMUNITY ¥£CGREENSTREET SCHOO¥£CL NUESTROS NINOS CHILD 0 500 1,000 2,000 FLUSHING 1.C AERIAL PREHSIODETNOCEG I RAPH BING MAPS © 2008 MICROSOFT CORP. GREENPOINT ENERGY CENTER 1/2 MILE OF ¥£ GREENSTREET C ¥£C DEVELOPMENT SCHOOL ¥£CAVENUE C 2¥£. PA¥£RCCEL BCOUNDARY AND LAND USE FROM BYTES OF THE BIG APPLE BROOKLYN, NEW YORK ¥£C C GREENPOINT ENERGY CENT¥£ER MAPPLUTO¥£. NYC DEPARTMENT OF CITY PLANNING. UPDATED NOV 2009. ¥£ 3. NYC DEPT. OF CITY PLANNING SELECTED FACILITIES AND PROGRAM SITES SCALE, FEET C o n su lt a n t s DATABASE. Proj 093260-2-1201 June 2012 Figure 2 J:\Projects\National_Grid\Greenpoint\sensitive_areas.mxd REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 1 2 , 2012

Plates

1. Site Plan with Historical Operations Features

2. Previous Site Investigation Locations

3. Phase 1 Proposed Remedial Investigation Locations

*# *#

Type of ID SourceR AV Source Description Year Investigation Area EKE 11 GeraghMtyE and Miller, Inc Underground Accumulation of Hydrocarbons 1979 SB, MW GPEC ANTHONY ST ANTHONY ST 12 Brooklyn Union Gas Borings in SNG Naphtha Tank Farm Area 1979 SB, MW GPEC 13 Roux Groundwater Contingency Plan 1990 SB, MW GPEC 15 Lexicon Environmental Greenpoint UST Site Investigation 1993 SB GPEC

S V C

16 Fanning, Phillps, & Molnar Underground Storage Tank GW Investigation 1995 SB, MW GPEC V A

A V

17 Groundwater Technology Greenpoint UST Abandonment 1994-1995 SB, MW GPEC A T

E T

R K

18 PS&S Maspeth Holder Demo 2004 Surf Soil GPEC N 19-GPEC-128 27-LH-SD108 A

C I D (! V *# 19-GPEC-131 W 27-LH-SD140

19 Vanasse Hangen Brustlin Maspeth Holder Demo sampling (pre-,post-demolition) 2001 Surf Soil GPEC R R

19-GPEC-134 E *# A ! ( A

20 Miller Environmental Holder Soil Samples - Lead Sampling 2002 Surf Soil GPEC V

(! 19-GPEC-132 G 19-GPEC-133 S 21 Miller Environmental Greenpoint Subsurface Investigation 2003 SB (! GPEC (! (! 22 NYSDEC Cooper Tank & Welding Corp 2003 Pump Well GPEC 23 PS&S LNG area investigation 2004-2005 SB GPEC STORAGE LOMBARDY ST GATE LOMBARDY ST 19-GPEC-130 19-GPEC-129 24 EEA,Inc. 254 Maspeth Ave 2004 SB EQ (! 40-GPEC-SED22 40-GPEC-SED21 12-GPEC-S127-1 2241.78' (! PARKING AREA 11-GPEC-X2 11-GPEC-D6 24-GPEC-GPESB-25 25, 26 PS&S LNG area investigation 2004 SB, MW, SV GPEC 11-GPEC-X1 GATE GATE GATE 6" 6" 12-GPEC-S129-1 (! (! 25-GPEC-GPEMW-1D 32-GPEC-GPESB-58 (! PARKING AREA (! 27 Anchor Environmental Laurel Hill Sediment Sampling 2004-2005 SED LH ?@ ?@ ?@ (! 24-GPEC-GPESB-24 V A@ 13-GPEC-MW-2 (!30-G(!PESB-33 12-GPEC-S22-2 (! 30-GPESB-32 (!A@A@ A 24-GPEC-GPESB-26 30-GPESB-27 37-GPEC-TP08 36-GPEC-GT22 28 Gannett Fleming, Inc. 252 Maspeth Ave (Equity) 2005 SB, MW EQ (! 13-GPEC-MW-3 30-GPESB-35N T (! 30-GPESB-31 30-GPESB-34

V (! 400,000- ! 25-GPEC-GPEMW-1S 23-GPEC-GPE6 23-GPEC-GPE8 (! *# 27-LH-SD141 R ANDONED ( (! A AB 32-GPEC-GPESB-52 PARKING AREA (! (! (!30-GPESB-35E 30 PS&S LNG area investigation 2006 SB GPEC ABANDONED A@ GALLON TAR (! O TANK 23-GPEC-GPE13 (! (! (! (! 27-LH-SD111 R TANK 32-GPEC-GPESB-53 A@A@ FIELD (! (! 30-GPESB-28 3300--GGPPEESSBB--3458W (! 25-GPEC-GPEMW-02S 25-GPEC-GPEMW-02D O ELD TANK 31 Gannett Fleming, Inc. 252-254 Maspeth Ave.(Equity) 2006 SB, MW GPEC E FI ! *# 19-GPEC-138 CRUDE OIL ( 23-GPEC-GPE5 23-GPEC-GPE7 V 32-GPEC-GPESB-54 (! ! T ( 30-GPESB-5213-GPEC-GPE3 SOLVENT TANK (! 23-GPEC-GPE2 ! R 26-GPEC-GPETP-04 37-GPEC-TP09 32 PS&S LNG area investigation 2007 ( SB GPEC R 11-GPEC-X3 30-GPESB-29 (! 24-GPEC-GPESB-14 (! (! E (! ! O ( LNG CONTROL (! 30-GPESB-36 23-GPEC-GPE11 27-LH-SD109 33 GEI Consultants Bulkhead Soil Investigation-South Fireboad Manifold 2008 SB D GPEC ?@ P HOUSE ! ( 24-GPEC-GPESB-23 23-GPEC-GPE251-GPEC-GPEMW-3S 27-LH-SD110 N A@A@ 25-GPEC-GPEMW-3D *# 34-GPEC-SB13/MW-13 POND AREA 23-GPEC-GPE12 (! 34 GEI Consultants Pre-Design Investigation 2009 SB, A MW, TP GPEC (! *# GATE 30-GPESB-30 (! (! (! V A@ (! 30-GPESB-37 35 GEI Consulta1n9t-sGPEC-139Stormwater Infiltration Study 2009 PZ GPEC 19-GPEC-136 23-GPEC-GPE923-GPEC-GPE10 24-GPEC-GPESB-18 19-GPEC-137 11-GPEC-X6 24-GPEC-GPESB24-1-G5 PEC-GPESB-16 (! (! 12-GPEC-S130-2 ! 23-GPEC-GPE4 (! (! 36 GEI Consultants Pre-Design Investigation-Barrier Wall (! 2009 SB, MW GPEC ( (! (! (! BEADEL ST ?@' 25-GPEC-GPEMW-04S A@A@ 37 GEI Consultants Pre-Design Investigation Test Pits 2010 TP GPEC (!3 12-GPEC-S130-1 30-GPESB-50 25-GPEC-GPEMW-04D 4 30-GPESB-38 40-GPEC-SED23 . 30-GPESB-43 24-GPEC-GPESB-17 0 13-GPEC-MW-4 (! 24-GPEC-GPESB-1294-GPEC-GPESB-20 38 GEI Consultants Ballfield Investigation 2010 Surf Soil GPEC 2 30-GPESB-40 (! (! 36-GPEC-GT21 (CPT) " (!5 ! 6 12-GPEC-S130-3 RESIDUAL ( (! ! ! A@ LNG PROCESS AREA ! ( ( (! (! 24-GPEC-GPESB-22 39 GEI Consultants Supplemental Pre-Design Investigation, 287 Maspeth Ave. 2010 SB, MW, CPT GPEC DISTILLATE 30-GPESB-4(!1 (!(! ( 40-GPEC-SED31 12-GPEC-A27-5 30-GPESB-49 24-GPEC-GPESB-21 40 GEI Consultants Supplemental Pre-Design Investigation, Newtown Creek 2010 Sed GPEC TANK 30-GPESB-42 30-GPESB-39 39-GPEC-SB114 6" (! (! 30-GPESB-44 ACCESS RESTRICTED AREA 27-LH-SD142 V 12-GPEC-S130-4 (!

A *#

41, 42 GEI Consultants Maspeth Re gulator Station Investigation 2010-2011 SB GPEC (! (! 30-GPESB-45

43 Malcolm Pirnie BCF Oil SitA e - Ditmas, Maspeth Ave Unkn SB, MW BCF ABANDONED (! 30-GPESB-46 G 27-LH-SD114 44 Malcolm Pirnie BCF Oil Site - BCF Oil, Maspeth Ave Unkn SB, MW BCF TANK

R LAGOON 27-LH-SD158 FIELD *#

O (! 45 AECOM Equity Site, 252 Maspeth Ave 2009 SB, MW EQ 19-GPEC-108 SNG FEEDSTOCK AREA 30-GPESB-47 *# BENZOL TANK M 13-GPEC-MW-5 46 Miller Environmental Surface Soil Investigation along Maspeth Ave 2010 Surf Soil GPEC (! ! A@ ( 19-GPEC-142 36-GPEC-GT20 47 AECOM Equity Works Remedial Investigation 19-GPEC-141 2010 SB 19-GPGEPCE-1C40 (! SB, MW (! 12-GPEC-S25-2 (! 27-LH-SD113 48 GEI Consultants Operations Support/ Remedial Investigation 2011 GPEC 34-GPEC-SB05S/MW-5S 36-GPEC-GT19 *# DIVISION PL (! LAGOON A@ (CPT) 27-LH-SD127 Notes 430.44' WASTE GATE *# 12-GPEC-S130-5 CATALYST A@ (! Area: ABANDONED (! 12-GPEC-S22-1 (! TANK FIELD 34-GPEC-SB05C/MW-5D 27-LH-SD117 GPEC - Greenpoint Energy Center K *# (! 1,000,000- DRY TAR LH - Laurel Hill E GALLON OIL PHASE 3 S(!TORAGE 39-GPEC-SB113

19-GPEC-122 E (! EQ - Equity Site TANK 40-GPEC-SED28 21-GPEC-SS2 21-GPEC-SS1 G (! (! A R 6" BCF - BCF Oil (! R

19-GPEC-127 C Type of Investigation: T

S 27-LH-SD115 *# SB - Soil Boring 19-GPEC-123 (! *# (! 40-GPEC-SED20 40-GPEC-SED19 N ! MW - Monitoring Well ( 19-GPEC-121 19-GPEC-109 TANK 6" *#6" ! 19-GPEC-126 W Surf Soil - Surface Soil Sample ( (! BASEBALL FIELD (! Sed - Sediment Sample 19-GPEC-124 O 1,000,000- AREA OBSCURED ! GALLON OIL LNG AREA 2 T SV - Soil Vapor Sample ( 19-GPEC-125 TANK WET TAR TANK No. 1 TP - Test Pit RICHARDSON ST (! TANKS W

CPT - Cone Penetrometer Test 34-GPEC-SB09/MW-9 E 11-GPEC-X4 LNG 27-LH-SD143 A@ N TANK No. 2 *# ?@ TAR TANK E

11-GPEC-X5 G A TANK 13-GPEC-MW-1 ?@ R 36-GPEC-GT18

O T ! A@ S ( TAR SEPARATOR 12-GPEC-S26-1 27-LH-SD205 40-GPEC-SED24 (! 21-GPEC-SS3 40-GPEC-SED30 19-GPEC-118 (! 12-GPEC-S27-2 *# ' 6"

(! 34-GPEC-SB08/MW-8 0 6" (! (! 12-GPEC-S27-1 7

A@ 7 CONDENSERS 6

12-GPEC-S26-2 19-GPEC-107 36-GPEC-GT17 8 SEPARATOR 1 GATE (CPT) 12-GPEC-S27-3 (! (! 27-LH-SD209 TAR IN PIT 12-GPEC-S27-4 (! *# (! EXTRACTORS A@ 34-GPEC-SB04C/MW-4 27-LH-SD144 *# (! SCRUBBERS TAR TANKS *# FROST ST

40-GPEC-SED29 36-GPEC-GT26 (CPT) 6" (! 19-GPEC-146 GAS (! 19-GPEC-110 GENERATORS (! (! RELIEF HOLDER 27-LH-SD128 PURIFIERS 27-LH-SD206 *# EQUIPMENT *# 27-LH-SD210 BUILDING 19-GPEC-158 # (! * 39-GPEC-SB107/MW-11D GATE V GASOLINE A@ BOILER A 40-GPEC-SED18 40-GPEC-SED16 TANKS 34-GPEC-SB11/MW-11 HOUSE

T 34-GPEC-SB03/MW-3D 34-GPEC-SB12/MW-12 STORAGE AREA 6" 6" R A@ 40-GPEC-SED17 ' A@

5 O 18-GPEC-1 18-GPEC-4 A@ (! 2 18-GPEC-7 (!A@ (! . 18-GPEC-28 18-GPEC-27 6" O 7 (! (! WITHERS ST 7 (! 36-GPEC-GT16 V (! 19-GPEC-111 4 (! 39-GPEC-SB106/MW-3WT 18-GPEC-37 1 DECANT AREA (! R PRODUCPER HASE 1 34-GPEC-SB07/MW-7D (! E (! (! 40-GPEC-SED27 18-GPEC-29 HOUSE 40-GPEC-SED25 D 18-GPEC-34 A@ 6" 6" N STORAGE BUILDING 40-GPEC-SED15 40-GPEC-SED14 A

V 18-GPEC-10 18-GPEC-12 6" 6" 6" 27-LH-SD212 STORAGE AREA 40-GPEC-SED13 (! (! 35-GPEC-SIS05 36-GPEC-GT15 *# 19-GPEC-150 PRODUCER GAS HOLDER (PZ) (CPT) (! OIL/WATER 19-GPEC-159 27-LH-SD211 HOLDER No. 2 A@ (! V SEPARATOR 18-GPEC-38 18-GPEC-35 18-GPEC-30 (! *#

A (! (! (! NAPHTHA PAD N PHASE 2 A 18-GPEC-2 18-GPEC-5 18-GPEC-8 37-GPEC-TP07

G (! (! Naphta Mixing 35-GPEC-SIS04 STORAGE AREA 27-LH-SD207 40-GPEC-SED10 R AREA 5 (! Feed Area (PZ) 40-GPEC-SED12 6" *# O Bins 6" 6" M AREA 3 A@ 37-GPEC-TP01 (! 40-GPEC-SED11 35-GPEC-SIS03 34-GPEC-SB02/MW-2 A@A@ 27-LH-SD130 AREA OBSCURED 41-GPEC-MR-01 A@ JACKSON ST 18-GPEC-33 GATE (PZ) 39-GPEC-SB112 18-GPEC-39 (! 34-GPEC-SB10/MW-10 34-GPEC-SB06/MW-6 *# (! 18-GPEC-31 MASPETH STATION AREA 18-GPEC-13 39-GPEC-SB105/MW-2(!D 36-GPEC-GT14 (! (! 18-GPEC-32 (! (! (! 36-GPEC-GT25 42-GPEC-SB-118 48-GPEC-SB201/MW201 A@ 35-GPEC-SIS02 A@ LEGEND (! (CPT) (! A@ (! 42-GPEC-SB-115 (PZ) A@ PARKING AREA 39-GPEC-SB111 41-GPEC-MR-02 (! (! Utility G 40-GPEC-SED09 40-GPEC-SED07 18-GPEC-36 18-GPEC-11 41-GPEC-MR-03 N ! I ( (! 42-GPEC-SB-121 (! (! 41-GPEC-MR-10 Unit CURRENT STRUCTURES 41-GPEC-MR(!-0(!4 K SERVICE BUILDING 39-GPEC-SB104 6" 6" 6" 40-GPEC-SED26 CRG UNIT 42-GPEC-SB-116 R HISTORICAL STRUCTURES

WASTE 42-GPEC-SB-119 (! A 35-GPEC-SIS01 37-GP(!EC-TP02 6" P

(! CATALYST CRG UNIT AREA (! ! (! 41-GPEC-MR-11 33-GPEC-GPHA-02 40-GPEC-SED08 42-GPEC(-SB-122 E 41-GPEC-MR-08 SITE BOUNDARY E ?@ 18-GPEC-3 18-GPEC-6 STORES BUILDING 33-GPEC-GPSS-2 3!3-GPEC-GPHA-01 Y ( 18-GPEC-9 41-GPEC-MR-(!13 !41-GPEC-MR-12 ( O 38-GPEC-BF3-83-7GPEC-BF-38 38-GPEC-BF-39 (! CRG Unit (! 33-GPEC-GPSS-1 ! (!(! 27-LH-SD129 (! (! UNDERGROUND L ( 33-GPEC-GPHA-03 A ACTIVE MONITORING WELL

(! P *# 42-GPEC-SB-117 (! OIL TANKS 36-GPEC-GT13 33-GPEC-GP(!SS-3 (! (! M 38-GPEC-BF-36 41-GPEC-MR-07 E 39-GPEC-SB109/MW-101WT (CPT) (! ? INACTIVE MONITORING WELL 38-G(!PEC-B(!F-32 (! (! 38-GPEC-BF-34 42-GPEC-SB-120 19-GPEC-160 33-GPEC-GPSS-4 40-GPEC-SED05 40-GPEC-SED04 (! Hydrogen A@A@A@ 40-GPEC-SED06 19-GPEC-106 Motor TAR LIQUOR TAR 39-GPEC-SB108/MW-101I (! 6" 6" 6" PREVIOUS INVESTIGATIONS 38-GPEC-BF-31 38-GPEC-BF-35 Unit STORAGE 36-GPEC-GT23 38-GPEC-BF-27 Control TANKS STORAGE (! (! (! (! (! TANK TANK (CPT) 39-GPEC-SB110 ?@ 38-GPEC-BF-33 (! 36-GPEC-GT24 Center 39-GPEC-SB103A/MW-103 11 18-GPEC-18 (CPT) Control (! TANK (! 27-LH-SD208 38-GPEC-BF-25 38-GPEC-BF-2308-GPEC-BF-22 38-GPEC-BF-29 (! House A@ ! SKI (! (! (! (! (! (! 18-GPEC-14 SUB. STA. "(!A" LIQUOR TANK 17-GPEC-SB-7 A@ (! 39-GPEC-SB103 *# ( 12 LLMA A N AV 38-GPEC-BF-26 38-GPEC-BF-30 19-GPEC-117 TAR MUCK AREA 1 36-GPEC-GT12 SOFTBALL FIELD (! E 35-GPEC-SIS06 TANKS TANKS (! (! R (! 17-GPEC-SB-4 A@ 13 R ! 34-GPEC-SB01B/MW-1 (! A (PZ) ( 39-GPEC-MW-01R BY-PRODUCTS 17-GPEC-SB-3 (! 38-GPEC-BF-1398-GPE(!C-BF-2(!1 (! (! (! (!38-GPEC-BF-23 O GATE BILLBOARD

R 40-GPEC-SED02 40-GPEC-SED01

38-GPEC-BF-28 S WASH OIL BUILDING (! 37-GPEC-TP05 E 38-GPEC-BF-24 S A@ RECTIFIERS

E STILL 17-GPEC-SB-2 (!(! A@ 48-GPEC-SB202 (! 15 M (! 40-GPEC-SED03 6" 6" 6" 38-GPEC-BF-14 HOLDER No. 1 R By Product 230.32' 18-GPEC-19 M R 38-GPEC-BF-09 38-GPEC-BF-10 (! OILP FROM ION BUWILADSTINE G (! ! ! ! O TRANSPORTAT ( ( ( (! (! (! O 38-GPEC-BF-13 38-GPEC-BF-18 18-GPEC-15 M Building 48-GPEC-MW202 HOLDEO R LIQUOR A@ ! F GAS 16 UNNAMED ST 38-GPEC-BF-16 ( O WASTE 37-GPEC-TP03 33-GPEC-GPSS-5

! SEAC LS S 17-GPEC-SB-1 ! ( SNG AREA WASHERS ( / CCOM. A ' 33-GPEC-GPHA-05 38-GPEC-BF-07 N CATALYST (!

Y 6 A (!

9 17 (! (! (! (! (! (! R AREA 4 BLDG. 38-GPEC-BF-12 PUMP . R PUMP HOUSE 38-GPEC-BF-15 38-GPEC-BF-17 A 35-GPEC-SIS07 OIL 36-GPEC-GT09

I @ 4 (! 18-GPEC-20 T A EMPLOYEE PARKING ! L ( 0 (! I (PZ) SCREENING 37-GPEC-TP04 HOUSE 38-GPEC-BF-41 (CPT) 1 18-GPEC-16 X TANK 15-GPEC-SS-2 27-LH-SD214 (! 18 38-GPEC-BF-06 (! U 36-GPEC-GT04D 15-GPEC-SS-3 36-GPEC-GT08 37-GA@PEC-TP06 A@ (! (! (! (! (! ! A 36-GPEC-GT01 36-GPEC-GT03 (! (! *# 38-GPEC-B3F8--0G8PEC-BF-(11 36-GPEC-GT02 35-GPEC-SIS08 (! 38-GPEC-BF-01 46-GPEC-S5 46-GPEC-S8 18-GPEC-17 (! (MW) A@ (MW) (MW) OIL SCRUBBER 15-GPEC-SS-4 (! ! ! 15-GPEC-SS-5 (! A@ 19-GPEC-112 (! (CPT) A@ (!A@( ( 36-GPEC-GT07 (MW) 39-GPEC-SB102/MW-102D 36-GPEC-GT10S 36-GPEC-GT11 AREA 4 (! 19 38-GPEC-BF-42 (PZ) 36-GPEC-GT04S 16-GPEC-W-1 46-GPEC4-S6-1G(!P(!E(!C(!-S(!466-4(!G6P(!-GE(!PC(!E-S(!C2-S446-GPEC-S10 (! GATE A@A@ 19-GPEC-119 A@ A@ GATE (! GATE (MW) (CPT) (! (! (! (MW) A@ 15-GPEC-SS-1 43-BCF-DMWA@-21 GATE ' 723.91' 20, 46 19-GPEC-151 383-G8-PGEPCE-CB3-FB8--F03G2-80P-3GECPE-BCF--B0F5-04 18-GPEC-23 2 (! (! 46- 46-46-GPEC-S9 0 . MILLER ENVIRONMENTAL GROUP (! 38-GPEC-BF-40 GPEC-SG3PEC-S7 (! 18-GPEC-21 (! 18-GPEC-22 (! 2178.63' 36-GPEC-GT05 A@ A@ 5

43-BCF-DMW-20 2 MASPETH AV (MW) )" 24 ETH AV AREA OBSCURED 16-GPEC-W-3 MASPETH AV MASP 45-EQ-MW-6A 44-BCF-MW-7 2538 , 2R5,D 26, 30, 32 44-BCF-PZ-M7 A@ 19-GPEC-152 (! 18-GPEC-24 44-BCF-PZ-E7 A@ A@ 16-GPEC-W-4 PS&S ?@ 45-EQ-MW-6B 24-EQ-B-5 31-EQ-SB-2 18-GPEC-25 18-GPEC-26 (! 45-EQ-MW-2B (! (! (! (! 19-GPEC-153 A@ A@ A@ *# 47-SB-2 )" (! A@ 27 ?@ ?@ (! 19-GPEC-113 47-SB-6 45-EQ-Pumping 19-GPEC-120 44-BCF-MW-8 (! 28, 31 (! Well (on) ?@ 44-BCF-MW-9 (! 47-SB-1(!5 )" 47-SB-3C A@ 44-BCF-PZ-K9 GANNETT AND FLEMING, INC. (! 31-EQ-SB-3 24-EQ-B-6 43-BCF-DMW-2 (! 28-EQ-B-1 44-BCF-MW-11 33, 34, 35, 36, 37, 47-SB-8 31-EQ-SB-4 47-SB-16B* 44-BCF-MW-12 A@ (! 47-SB-16A 38, 39, 40, 41, 42, 48 47-SB-13 (! 28-EQ-B-2 44-BCF-MW-10 A@ A@ 44-BCF-PZ-Q13 43-BCF-DMW-7A 43-BCF-DMW-17 A@ /" V 47-SB-14B 47-SB-14A* (! GEI CONSULTANTS, INC.

A A@ 47-SB-12B @ 47-SB-9 )" 24-EQ-B-4 A@ 44-BCF-PZ-K11 A A@ 43, 44 T 47-SB-5 45-EQ-MW-4B

V 28-EQ-B-3 (! 47-SB-12

R A 47-SB-10 ?@ 45-EQ-MW-5B 24-EQ-B-2 ?@ 45-EQ-MW-4A 44-BCF-MW-14 A@ @ 45, 47 O 43-BCF-DMW-4 ? N 47-SB-11 47-SB-4 44-BCF-MW-13 )" 44-BCF-PZ-E17 T

O AECOM A 45-EQ-MW-5A (! 28-EQ-B-4 ?@ 31-EQ-SB-1 S (! V 45-EQ-MW-1B )" )" A@ A@ (! G 43-BCF-DMW-3

31-EQ-SB-5 47-SB-17 24-EQ-B-3 A@ A@ 43-BCF-DMW-18 7

R 4 R ?@ E 45-EQ-MW-1A (! 24-EQ-B-147-SB-7B47-SB-7A* 44-BCF-MW-17 A@ A@ O 44-BCF-MW-15 D A@ 43-BCF-DMW-3A

47-SB-18 A@ M

19-GPEC-161 N 47-SB-1 A@ 43-BCF-DMW-16 A@ 43-BCF-DMW-6 REMEDIAL INVESTIGATION WORKPLAN (! A (! 19-GPEC-116 44-BCF-MW-6 V GREENPOINT ENERGY CENTER 44-BCF-MW-16 A@A@ A@ 44-BCF-PZ-N21A FORMER MANUFACTURED GAS PLANT SITE 44-BCF-PZ-N21 PREVIOUS SITE INVESTIGATION LOCATIONS (! SOURCES: BROOKLYN, NEW YORK 1. FIGURE BASED ON PLAN TITLED "PROPOSED SOIL BORINGS/TEST PIT, 0 50 100 200 MONITORING WELL AND SOIL GAS SAMPLE LOCATION SITE PLAN," BY PAULUS 43-BCF-DMW-5 SOKOLOWSKI AND SARTOR ENGINEERING, PC DATED OCT 2004. 2. SURVEY OF EXISTING MONITORING WELLS CONDUCTED BY GEI ON 6-16-09. SCALE, FEET A@ C o n su lt a n t s 3. AERIAL PHOTOGRAPH BING MAPS © 2008 MICROSOFT CORP. 455 WINDING BROOK DRIVE SUITE 201 4. STREETS, NYC DEPARTMENT OF CITY PLANNING, BYTES OF THE BIG APPLE PROJECT 093260-2-1201 GLASTONBURY, CONNECTICUT 06033 June 2012 Plate 2

J:\Projects\National_Grid\Greenpoint\Locations_v3.mxd

(! *# (! (!

*# AV Y Type of LOMBARDY ST ER EXW EEK NS IMD SoUuErEce Source Description Year Investigation Area Q 5 N V KLY 6 O A 23 RO PS&S LNG area i nvestigation 2004-2005 SB GPEC R B T R AV D EKE R V 25, 26 PSE&S LNG area investigation A 2004 SB, MW, SV GPEC O M

O R 40-GPEC-SED22

30 PS&S LNG area investigation E 2006 SB GPEC 5 T R 7 48-GPEC-SB216

R 47-GPEC-TP200 A 32 PS&S LNG area E investigation 2007 SB GPEC V

D O (! 33 GEI Consultants Bulkhead SN oil Investigation-South Fireboad Manifold P 2008 SB GPEC

S V

34 GEI Consultants Pre-Design Investigation 2009 SB, MW, TP GPEC A

O 37-GPEC-TP08

35 GEI Consultants Stormwater Infiltration Study 2009 PZ GPEC E K

ONY ST N ANTHONY ST ANTHONY ST ANTH C ANTH 36-GPEC-GT22

ONY ST I A

36 GEI Consultants Pre-Design Investigation-Barrier Wall 2009 SB, MW GPEC D

A A

37 GEI Consultants Pre-Design Investigation Test Pits 2010 TP GPEC V

G 23-GPEC-GPE8

V 25-GPEC-GPEMW-02D A

38 GEI Consultants Ballfield Inv estigation 2010 Surf Soil GPEC

V T AA

R 39 GEI Consultants Supplemental Pre-Design Investigation, 287 Maspeth Ave. A 2010 SB, MW, CPT GPEC

T O 25-GPEC-GPEMW-02S

R O

40 GEI Consultants Supplemental Pre-Design Investigation, Newtown Creek 2010 Sed GPEC A V

W R R 37-GPEC-TP09

E 41, 42 GEI Consultants Maspeth ReE gulator Station Investigation 2010-2011 SB GPEC

T D

S 48 GEI Consultants Operations SN upport/ Remedial Investigation 2011 SB, MW GPEC (!

A 48-GPEC-SB215 V 47-GPEC-TP201

Notes STORAGE LOMBARDY ST 25-GPEC-GPEMW-3S Area: GPEC - GreeLnpOoMintB EAnRerDgyY CSeTnter LOMBARDY ST GATE 23-GPEC-GPE12 A A 2241.78' 40-GPEC-SED21 Type of Investigation: 24-GPEC-GPESB-25 PARKING AREA GATE GATE GATE PARKING AREA 25-GPEC-GPEMW-1D 32-GPEC-GPESB-58 40-GPEC-SED22 SB - Soil Boring 30-GPESB-33 48-GPEC-SB216 (! 23-GPEC-GPE1 V 24-GPEC-GPESB-26 30-GPESB-32 AA 24-GPEC-GPESB-24

A 30-GPESB-37

MW - Monitoring Well 30-GPESB-27 37-GPEC-TP08 30-GPESB-35N T 30-GPESB-31 30-GPESB-34 400,000- 25-GPEC-GPEMW-1S 25-GPEC-GPEMW-02S Surf Soil - Surface Soil Sample R ABANDONED PARKING AREA 23-GPEC-GPE6 ABANDONED GALLON TAR 32-GPEC-GPESB-52 23-GPEC-GPE8 36-GPEC-GT22 O TANK TANK 32-GPEC-GPESB-53 23-GPEC-GPE13 AA Sed - Sediment Sample FIELD 30-GPESB-28 30-GPESB-35W 30-GPESB-35E 25-GPEC-GPEMW-02D O FIELD TANK 23-GPEC-GPE5 CRUDE OIL 32-GPEC-GPESB-54 23-GPEC-GPE7 48-GPEC-TP202 24-GPEC-GPESB-18 SV - Soil Vapor Sampe V SOLVENT TANK 30-GPESB-5213-GPEC-GPE3 37-GPEC-TP09

R 30-GPESB-29 23-GPEC-GPE11 30-GP3E0S-BG-P4E8SB-36 24-GPEC-GPESB-14

E (! TP - Test Pit LNG CONTROL 48-GPEC-SB215 D HOUSE 25-GPEC-GPEMW-04S 48-GPEC-SB218 24-GPEC-GPESB-23 23-GPEC-GPE223-GPEC-GPE1 24-GPEC-GPESB-17 25-GPEC-GPEMW-04D N AA 25-GPEC-GPEMW-3S PZ - piezometer wells POND AREA A AA GATE 30-GPESB-30 CPT - Cone Penetrometer Test V @ 23-GPEC-GPE12 AA@ 34-GPEC-SB13/MW-13 23-GPEC-GPE9 23-GPEC-GPE10 48-GPEC-TP201 30-GPESB-37 23-GPEC-GPE4 24-GPEC-GPESB-15 25-GPEC-GPEMW-04S V 24-GPEC-GPESB-18 36-GPEC-GT21

BEADEL ST BEADEL ST ' 24-GPEC-GPESB-17 AA 36-GPEC-GT21 (CPT)

R 4 30-GPESB-50 24-GPEC-GPESB-16 (CPT) . 30-GPESB-38

E 40-GPEC-SED23 0 30-GPESB-43 25-GPEC-GPEMW-04D

2 24-GPEC-GPESB-1294-GPEC-GPESB-20

T 5 RESIDUAL 30-GPESB-40 24-GPEC-GPESB-22 R LNG PROCESS AREA 24-GPEC-GPESB-22 ATE 30-GPESB-41 V DISTILL 30-GPESB-49 O 24-GPEC-GPESB-21 40-GPEC-SED31 24-GPEC-GPESB-21

A 30-GPESB-39 P 30-GPESB-42

TANK

T ACCESS RESTRICTED AREA 30-GPESB-44 48-GPEC-SB214 (! 39-GPEC-SB114 R 48-GPEC-SB217

O 30-GPESB-45 O

V A@ 30-GPESB-46 ABANDONED 48-GPEC-SB214

R K TAN LAGOON 39-GPEC-SB114

E FIELD 48-GPEC-SB213 A 30-GPESB-47 (! D SNG FEEDSTOCK ARE BENZOL TANK N (! A V 36-GPEC-GT20 ON PL 48-GPEC-SB219 34-GPEC-SB05S/MW-5S DIVISION PL DIVISI 0 20 40 80 LAGOON ASTE GATE A@ 430.44' A@ W 36-GPEC-GT19 CATALYST A@ ABANDONED (CPT)

TANK K FIELD 34-GPEC-SB05C/MW-5D SCALE, FEET E DRY TAR 1,000,000- E GALLON OIL STORAGE

39-GPEC-SB113 R TANK E

G C

A 40-GPEC-SED28

O N

T S (! 48-GPEC-SB212 W 40-GPEC-SED19 (!

40-GPEC-SED20 O ANK

T T BASEBALL FIELD AREA 2 1,000,000- W AREA OBSCURED LNG 48-GPEC-SB211 GALLON OIL E WET TAR TANK No. 1 TANK N RICHARDSON ST TANKS (! 34-GPEC-SB09/MW-9 LNG A@ TANK No. 2

TAR TANK E

A TANK

O 36-GPEC-GT18

T 48-GPEC-SB210

S TAR SEPARATOR (! A@ 40-GPEC-SED30 40-GPEC-SED24

34-GPEC-SB08/MW-8 0 A@

CONDENSERS A@ 6 36-GPEC-GT17 8 SEPARATOR 1 GATE 34-GPEC-SB04C/MW-4 (CPT) TAR IN PIT EXTRACTORS A@ SCRUBBERS TAR TANKS FROST ST 48-GPEC-SB209 36-GPEC-GT26 40-GPEC-SED29 GAS (CPT) (! GENERATORS RELIEF HOLDER PURIFIERS EQUIPMENT BUILDING 48-GPEC-SB208

39-GPEC-SB107/MW-11D (! GATE V GASOLINE A@ BOILER

A 48-GPEC-SB221 TANKS 34-GPEC-SB11/MW-11 HOUSE 40-GPEC-SED18 40-GPEC-SED16 T 34-GPEC-SB03/MW-3D ! AREA ( STORAGE

R A@ ' A@ 40-GPEC-SED17

5 O @A@ 34-GPEC-SB12/MW-12 2 A A@ . 48-GPEC-SB220 PHASE 1

O 7 36-GPEC-GT16

WITHERS ST 7

V 34-GPEC-SB03S/MW-3S

4 39-GPEC-SB106/MW-3WT 1 ECANT AREA R D A@ PRODUCER 34-GPEC-SB07/MW-7D E HOUSE 40-GPEC-SED25 40-GPEC-SED27 D A@ 48-GPEC-SB207 N STORAGE BUILDING A 40-GPEC-SED15 40-GPEC-SED13

V (! 35-GPEC-SIS05 STORAGE AREA 40-GPEC-SED14 PRODUCER GAS HOLDER (PZ) OIL/WATER 36-GPEC-GT15 HOLDER No. 2 SEPARATOR A (CPT) NAPHTHA PAD (! 48-GPEC-SB206 37-GPEC-TP07 Naphta 35-GPEC-SIS04 STORAGE AREA Mixing 40-GPEC-SED12 40-GPEC-SED10 Feed Area Bins (PZ) 40-GPEC-SED11 AREA 3 A 37-GPEC-TP01 39-GPEC-SB112 A 35-GPEC-SIS03 34-GPEC-SB02/MW-2 A@A@ 39-GPEC-SB105/MW-2D AREA OBSCURED SNG PLANT JACKSON ST GATE 41-GPEC-MR-01 34-GPEC-SB10/MW-10 (PZ) 34-GPEC-SB06/MW-6 MASPETH STATION AREA 48-GPEC-SB201/MW201 36-GPEC-GT14 36-GPEC-GT25 A@ 35-GPEC-SIS02 LEGEND 41-GPEC-MR-02 42-GPEC-SB-118 42-GPEC-SB-115 A@ A@ (PZ) A PARKING AREA 39-GPEC-SB111

(CPT) 42-GPEC-SB-121 41-GPEC-MR-04 Utility G N

I 40-GPEC-SED08 41-GPEC-MR-03 41-GPEC-MR-10 Unit 40-GPEC-SED09 40-GPEC-SED07 K SERVICE BUILDING 41-GPEC-MR-06 41-GPEC-MR-05 40-GPEC-SED26 CURRENT STRUCTURES CRG UNIT 42-GPEC-SB-116 R

WASTE 42-GPEC-SB-119 A 35-GPEC-SIS01 37-GPEC-TP02 P CATALYST CRG UNIT AREA 42-GPEC-SB-122 41-GPEC-MR-11 41-GPEC-MR-08 E 39-GPEC-SB104 33-GPEC-GPHA-02 HISTORICAL STRUCTURES 41-GPEC-MR-09 E ? STORES BUILDING 33-GPEC-GPSS-2 41-GPEC-MR-12 41-GPEC-MR-13 Y CRG Unit O 33-GPEC-GPHA-03 33-GPEC-GPSS-3 42-GPEC-SB-120 UNDERGROUND L 33-GPEC-GPSS-1 SITE BOUNDARY 38-GPEC-BF-37 38-GPEC-BF-38 42-GPEC-SB-117 OIL TANKS P 33-GPEC-GPSS-433-GPEC-GPHA-01

38-GPEC-BF-39 M

41-GPEC-MR-07 E 38-GPEC-BF-36 39-GPEC-SB109/MW-101WT39-GPEC-SB101A/MW-101D 36-GPEC-GT13 (CPT) 4338-G-PGECP-GEPHCA-0-4TP200 PHASE 1 INVESTIGATION 40-GPEC-SED06 40-GPEC-SED05 40-GPEC-SED04 38-GPEC-BF3-383-GPEC-BF-32 38-GPEC-BF-35 Hydrogen A@A@A@ (! Motor TAR LIQUOR TAR 39-GPEC-SB108/MW-101I 48-GPEC-SB205 1888 NEWTOWN CREEK 38-GPEC-BF-31 Unit TANKS STORAGE STORAGE 38-GPEC-BF-34 Control TANK T TANK 36-GPEC-GT23 (CPT) 39-GPEC-SB103A/MW-103 38-GPE3C8-BGFP-E2C7-BF-28 38-GPEC-BF-29 Center Control AREA 1 HISTORICAL D SRAINAGE AREA TANK 39-GPEC-SB110 8 38-GPEC-BF-26 36-GPEC-GT24 House A@ 4 S 38-GPEC-BF-25 38-GPEC-BF-30 SUB. STA. "A" LIQUOR TANK 48-GPEC-SB204 (! 39-GPEC-SB103 KILLMAN AV A (CPT) TAR MUCK A@ (! PROPOSED SOIL BORING LOCATION

38-GPEC-BF3-82-1GPEC-BF3-82-2GPEC-BF-23 E SOFTBALL FIELD 35-GPEC-SIS06 TANKS TANKS 36-GPEC-GT12 R 34-GPEC-SB01B/MW1

38-GPEC-BF-20 R A (PZ) A@ BY-PRODUCTS

38-GPEC-BF-19 O GATE 48-GPEC-MW202 BILLBOARD PROPOSED MONITORING WELL CLUSTER R

S WASH OIL BUILDING 37-GPEC-TP05 40-GPEC-SED03 40-GPEC-SED02 40-GPEC-SED01 E 38-GPEC-BF-15 38-GPEC-BF-16 38-GPEC-BF-24 S A RECTIFIERS

E STILL 48-GPEC-SB202 M A@

38-GPEC-BF-13 HOLDER No. 1 R By Product 230.32' M R OILP FROM ION BUWILADSTINEG PROPOSED TEST PIT

O TRANSPORTAT O M Building 48-GPEC-SB203

HOLDEO R LIQUOR

F GAS 38-GPEC-BF-18 O WASTE 33-GPEC-GPHA-05 38-GPEC-BF-08 38-GPEC-BF-10 R 37-GPEC-TP03 SEAC LS S SNG AREA WASHERS / CCOM. A ' A@ 38-GPEC-BF-0378-GPEC-BF-14 38-GPEC-BF-17 N CATALYST 33-GPEC-GPSS-5 MONITORING WELL WITH DNAPL

Y (! 6 A

9 R BLDG.

PUMP . R PUMP HOUSE

A 35-GPEC-SIS07 OIL

I 36-GPEC-GT09 4 38-GPEC-BF-12 T A EMPLOYEE PARKING 38-GPEC-BF-03 L 48-GPEC-SB222 0 I (PZ) SCREENING HOUSE GEI PRE DESIGN INVESTIGATION,

1 38-GPEC-BF-3089-GPEC-BF-42 38-GPEC-BF-11 X TANK (CPT) 38-GPEC-BF-41 U 36-GPEC-GT03 37-GA@PEC-TP06 A@ BORING WITH ANALYTICAL DATA A 36-GPEC-GT01 36-GPEC-GT07 36-GPEC-GT08 36-GPEC-GT11 (CPT) 36-GPEC-GT02 35-GPEC-SIS08 36-GPEC-GT06 37-GPEC-TP04 38-GPEC-BF-04 A@ (MW) A (MW) OIL SCRUBBER (MW) A@ (CPT) (PZ) (CPT) 36-GPEC-GT10S 36-GPEC-GT10D 38-GPEC-BF-01 38-GPEC-B3F8--0G2PEC-BF-05 38-GPEC-BF-06 A@ GEI PRE DESIGN INVESTIGATION WELL GATE A@A@ 36-GPEC-GT05 A@ A@ GATE GATE (MW) A@ A@ GATE ' 39-GPEC-SB102/MW-102D 723.91' (MW) 38-GPEC-BF-40 (MW) 2

0 36-GPEC-GT04S 36-GPEC-GT04D . 2178.63' 5 GEI SEDIMENT SAMPLING LOCATION MASPETH AV (MW) (MW) 2 MASPETH AV AREA OBSCURED 58 RD EXISTING BORING LOCATION

A EXISTING MONITORING WELL

V A SOURCES: T PHASE I REMEDIAL INVESTIGATION

1. FIGURE BASED ON PLAN TITLED "PROPOSED SOIL BO R INGS/TEST WORK AUTHORIZATION REQUEST O

PIT, MONITORING WELL AND SOIL GAS SAMPLE LOCATION SITE GREENPOINT ENERGY CENTER T

PLAN," BY PAULUS SOKOLOWSKI AND SARTOR ENGINEEV RING, PC FORMER MANUFACTURED GAS PLANT SITE

7 R

DATED OCT 2004. BROOKLYN, NEW YORK 4 PHASE 1 PROPOSED REMEDIAL E

2. SURVEY OF EXISTING MONITORING WELLS CONDUCTD ED BY GEI ON INVESTIGATION LOCATIONS

6-16-09. N 0 50 100 200 A

3. AERIAL PHOTOGRAPH BING MAPS © 2008 MICROSOFTV CORP. 4. STREETS, NYC DEPARTMENT OF CITY PLANNING, BYTES OF THE C o n su lt a n t s BIG APPLE SCALE, FEET 455 WINDING BROOK DRIVE SUITE 201 PROJECT 093260 GLASTONBURY, CONNECTICUT 06033 June 2012 Plate 3

J:\Projects\National_Grid\Greenpoint\Proposed_Locations_V6.mxd REMEDIAL INVESTIGATION WORK PLAN GREENPOINT ENERGY CENTER FORMER MANUFACTURED GAS PLANT SITE BROOKLYN, NEW YORK JUNE 1 2 , 2012

Appendices A-G on CD (included in pouch)

A Historical Investigations B Site-Related Records C Quality Assurance Project Plan D Health and Safety Plan E Field Sampling Plan F Community Air Monitoring Program G Project Organization Chart