D AVID A
. PATERSON P ETER M. IWANOW ICZ G OVERNOR AcnHG COMM ISSIONER STATE OF N EW YORK D EPARTM ENT O F ENVIRONMENTAL CONSERVATlON AlaANY. N EW Y ORK 12233 - 1 0 10 

## D

EC 2 7 Z010

Mr. Walter Mugdan Director Emergency & 

### Remedial Response Division United States Environmental Protection Agency Region 2 290 Broadway

- 19th Floor, E38 New York, New York 10007-1866 Dear M r. Mugdan : Unde r authority delegated 

### by the Governor of New York in 1995 to the Commissioner of the Department of Environmental Conservation (DEC» ) I am requesting that the area enco mpassing contaminated groundwater migrating from the New Cassel Industrial Area Sites, Off

- site Groundwater South of the New Cassel Industrial Area, Operable Unit No
. 3, the General In struments Corp., Site No. 130020, Operable Unit 2, and the 70-140 Cantiague Rock Rd.lFonner Sylvania, Site No. V00089, Operable Unit 2, be nominated to the National Priorities Li st. 

### The Prc-Remedial Section, Special Projects Branch of the Emergency and Remedial Response Divi sion ofthe EPA in Region 2 has initiated an investigation and hazard ranking system scoring cffon for the area encompass ing contaminated groundwater migrating fro m the New Cassel Industrial Area Sites, Off- site Groundwater South of the New Cassel Industrial Area, Operable Unit No.3 , the General Instruments Corp., Ope rable Unit 

### 2
. and the 70-140 C antiague Rock Rd .lFonner Sylvania , Operable Unit 2. The New Cassel Industrial Area Sites Operable Unit No.3 area of concern, located 

### in the To wn ofNorth Hempstead, Nassau County, New York, encompasses the area bordering the New Casse l Industrial Area (NCIA) south of Old Country Road and Grand Boulevard and includes the B owling Green Estates Water District well field
. Di sposal activitie s at 14 inactive hazardous waste disposal si tes within the NClA have resulted in the disposaJ of hazardous wastes which have migrated fro m the s ites to surrounding areas and contaminated the so le

- so urce groundwater aquifer located to the south o f the NCIA. Thi s groundwater contamin ation has adversely impacted the Bowling Green Estates Water Di s trict well field. 

# 4ceors ofstewordship 19]0-2010

### 2.

The New Cassel Indu s trial Area Operable Unit No.3 consists of off-site groundwater contamination , primarily located to the south of the New Cassel Industrial Area (NClA) , which is migrating from the NCIA. The other operable units are associated with the in dividual sites located within the NCIA:

• Operable Unit No.1 which identities and remediates source areas of contamination at each site in the NCIA. • Operable Unit No.2 which identifies and remediates groundwater contamination at and beneath each si te 

### in the NCIA. 

### The NCLA is located in 

### the Town ofNorth Hempstead
. Nassau County. It encompasses approximately 170 acres of land. The NCLA is a heavily developed industrial and commercial area. Development 

### in this area dates back to the 1950's. A report entitled "Remedial Investigation for Off-site Groundwater 

### in the New Cassel Indu strial Area, September 2000" was prepared which describes the field activities and findings of the remedial investigation. This report was the basis for the State Superfund Record of Decision , issued by DEC in October 2003, which presented the selected remedy for Operable Unit No.3 of the New Cassel Industrial Area sites. The selected remedy was in-well vapor stripp ing, and if the selected remedy proved to be impractical, a contingent remedy would be ins talled. A PreDesign Investiga tion Report, dated June 2009, recommended implementing the contingent remedy , ex- situ extraction and treatment, due to both the technological limitations and logistical hurdles associated with the in-well stripping technology. The current estimate to implement the ex-situ extraction and treatment rcmedial program impacts DEC ' s ability to realize the cleanup
. The remed ial program at Operable Unit 2 of both the General Instruments Corp. inactive hazardou s waste disposal si te an d the 70-140 Cantiague Rock Rd.lFonner Sylvania voluntary cleanup site is investigating the off

- site plume that is migrating from these two sites south of West John Street. These two sites are adjacent to each other on Cantiague Rock Road and the contaminated groundwater plume from them commingles as it moves downgradient beyond West John Street. The off

- site plume that extends to the south has not been fully delineated. It appears that the off-site plume that is south of West John Street and migrating from the General Instruments Corp. inacti ve hazardous waste disposal site and the 70-140 Cantiague Rock Rd.lFonner Sylvania voluntary cleanup site has adversely affected the Hicksville Water District Plant 5 well field. The General Instruments Corp. site is located at 600 West John Street northeast ofthe intersection of West John Street and Cantiague Rock Road in the Town of Oyster Bay , Nassau County , New York. The Il.S-acre site is located in a I jght industrial section of Hicksville, and was developed in 1960 for General Transistor which was subsequently acquired by General Instruments Corporation. The adjacent 70-1 40 Cantiague Rock Rd.lFonner Sylvania site is a 1

O.S-acre area divided into three separate but contiguous properties located at 70 , 100, and 140 Cantiague Rock Road in the Town of Oyster Bay, Nassau County, New York. The site is surrounded by industrial and commercial areas to the north , south, and west, whereas a recreational area is located immediately east of the site (Cantiague Park).3.

An interim report and supplemental work plan are the next deliverabl e under the General Instruments Corp . investigation. The remedi al investigation is not expected to 

### be complete until Spring 2011. The DEC approved ' a work p lan. in March 2010 , to determine whether the 

### on - sile SVE system 

### has reach ed cleanup goals and can be shut down. This decision is also not expected to be complete until Spring 2011. The United States Anny Corps of Engineers i s performing a morc detailed analysis to determine which areas a fth e 70-140 Cantiague Rock Rd .lFormer Sylvania site, if 

### any. s hould be 

### designated for a FUSRAP cleanup. Work under the Voluntary Cleanup Agreement has slowed as the USACE continues its investigation. 

### The magnitude of the remedial programs encompassing the area of contaminated groundwater migrating from the New Cassel Industrial Area Sites, Off-site Groundwater S o uth of the New Cassel Industrial Area, Operable Unit No.3, the General Ins truments Co rp ., Operable Unit 2 , and the 70-14 0 Cantiague Rock Rd.lFormer Sylvani a, Operable Unit 2, greatly exceeds the resources availab le at the DEC
. Consequently. the DEC requests that the USE PA nominate thi s area of concern for the National Priorities Li s t. 

### If you or your staff would like to discuss this request further
. please contact Dale A. Desnoyers at ( S i8) 402

-9706. Sincerely,

Peter M. Iwanowicz

c: Dale A. Desnoyers