GE Corporate

159 Plastics Avenue Pittsfield. MA 01201

USA

Transmitted via Electronic Mail and Overnight Courier

January 8, 2015

Mr. John Ziegler Bureau of Waste Site Cleanup Department of Environmental Protection 436 Dwight Street Springfield, MA 01103

Re: GE-Pittsfield/Housatonic River Site

Mr. Dean Tagliaferro U.S. Environmental Protection Agency EPA New England I 0 Lyman Street, Suite 2 Pittsfield, MA 0120 I

East Street Area 1 -South (GEACOlOO) Post-Excavation Notification -Southside Groundwater Recovery System Repair

Dear Mr. Ziegler and Mr. Tagliaferro:

In a letter dated July 17, 20 14, the General Electric Company (GE) provided advance notice to the U.S. Environmental Protection Agency (USEPA) and the Massachusetts Department of Environmental Protection (DEP) regarding a planned excavation at GE's Pittsfield, Massachusetts facility (Site). The excavation, conducted within East Street Area I - South, involved the replacement of a section of the 2-inch diameter pipeline associated with the Southside Groundwater Recovery System caisson located within GE-owned Parcels JI0-6-19 and JI0-6-20. This work was conducted in accordance with GE' s Protocols for the Management of Excavation Activities (November 1996) and the plan provided in GE's July 17, 2014 letter.

The work was initiated on August 5, 2014 and conducted in the manner as described in GE's July 17, 2014 letter. The uppem1ost one foot of soil was excavated, stockpi led separate from the deeper soil excavations, and characterized for off-site disposal. The approximate location of the completed excavation is shown on Figure I. Final dimensions for the excavation were approximately 20 feet long, 5 feet wide, and 6 feet deep, equating to approximately 23 cubic yards of excavated material. This work was also performed in conjunction with a separate notification provided to USEPA and DEP on August 18, 2014 related to an excavation within East Street Area !-North (GECD130) . Together, both excavations were required to replace an approximately one-hundred sixty ( 160) foot section of 2-inch diameter groundwater recovery pipeline. The pipeline section was replaced with new 2-inch diameter High Density Polyethylene (HDPE).

Following the installation of the new ptpmg on the south side of East Street, the excavation was backfilled, beginning with soil that was excavated from below the one-foot depth. This material was generally replaced in the same depth increment from which it was excavated. Imported clean soil was used as backfill within the uppermost top foot.

Corporate Enwonmentol Progrcms

J. Ziegler and D. Tagliaferro January 8, 2015

Page 2 of2

No soil that was excavated below one foot was used as backfill within the top foot. Asphalt/concrete was then installed to meet surrounding ground surface elevations as needed . The site work was completed on September 11 , 2014.

Waste materials generated during the work included approximately 3.7 cubic yards of soil and asphalt/concrete and the removed segment of the existing 2-inch diameter steel pipeline. Prior to disposal, the waste materials were sampled and analyzed for total PCBs as well as Toxicity Characteristic Leaching Procedure Volatile Organic Compounds, Semi-Volatile Organic Compounds and inorganics. Based on the review of the analytical data, the waste materials were transported to the Greentree Landfill (Advanced Disposal) located in Kersey, PA for disposal (disposal confirmation was provided by the Greentree Landfill on December 9, 2014). The waste material sampling data and disposal documents are provided in Attachment A.

Overall, the activities described above were performed in a manner consistent with the conditions and requirements described in GE's July 17, 2014 letter to USEPA and DEP providing notification of an upcoming planned excavation.

Should there be any questions or comments, or if additional information is needed, please contact me at 413-448-5909.

Sincerely,

~dwJ~)JNrJ Richard Gates Senior Project Manager Global Operations - Environment, Health and Safety

Attachment

cc: Richard Fisher, USEPA Michael Backunas, DEP Rod McLaren, GE Matthew Calacone, GE Shannon Reilly, General Dynamics Chris Ferry, ASRC Primus (electronic) James Bieke, Sidley Austin James Nuss, ARCADIS GE Environmental Library

G:\GE\GE_P~tsfield_ACO _Non-Res_ESA 1·South\Correspondence\Post-Work\00• 151 1324PWN_ SS GW Recovery Repair.docx

SOUTHSIDE GROUNDWATER RECOVERY CAISSON EXCAVATION AND

SOIL SAMPLE LOCATIONS

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GENERAL ELECTRIC COMPANY

PITTSFIELD, MASSACHUSETTS

EAST STREET AREA 1 - NORTH AND - SOUTH

1

Attachment A

Sample ID: Soil 1Date Collected: 9/22/2014

ppm ND(0.332)ppm ND(0.332)ppm ND(0.332)ppm ND(0.332)ppm ND(0.332)ppm ND(0.332)ppm 1.05ppm 1.05

ug/L ND(10)ug/L ND(10)ug/L ND(10)ug/L 19.2 Jug/L ND(10)ug/L ND(10)ug/L ND(10)ug/L ND(10)ug/L ND(10)ug/L ND(10)ug/L ND(10)

mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)mg/L ND(0.05)

mg/L 0.0111 Bmg/L 0.298mg/L 0.0245 Bmg/L ND(0.1)mg/L 0.295mg/L ND(0.0003)mg/L 0.0376 Bmg/L 0.0205 B

Cadmium

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1,1-Dichloroethene

Aroclor-1260Aroclor-1254Aroclor-1248Aroclor-1242Aroclor-1232Aroclor-1221Aroclor-1016

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PyridinePentachlorophenolNitrobenzeneHexachloroethane

TCLP Inorganics

SilverSeleniumMercuryLeadChromium

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2,4,5-Trichlorophenol1,4-Dichlorobenzene

HexachlorobutadieneHexachlorobenzene3- & 4- Methylphenol2-Methylphenol2,4-Dinitrotoluene2,4,6-Trichlorophenol

Barium

Vinyl chlorideTrichloroetheneTetrachloroetheneChloroformChlorobenzene

TCLP SVOCs

TCLP VOCs

PCBs

TABLE 1WASTE MATERIAL SAMPLING RESULTS

EAST STREET AREA 1 - SOUTHGENERAL ELECTRIC COMPANY - PITTSFIELD, MASSACHUSETTS

Carbon tetrachlorideBenzene2-Butanone1,4-Dichlorobenzene1,2-Dichloroethane

Total PCBs

G:\GE\GE_Pittsfield_ACO_Non-Res_ESA1-South\Correspondence\Post-Work\0041511324PWNTbl.xlsx

Page 1 of 2

1/8/2015

TABLE 1WASTE MATERIAL SAMPLING RESULTS

EAST STREET AREA 1 - SOUTHGENERAL ELECTRIC COMPANY - PITTSFIELD, MASSACHUSETTS

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2.3.4.5.

Notes:

ND - Analyte was not detected. The number in parentheses is the associated detection limit.

Samples were collected by General Electric Company subcontractors and submitted to SGS Environmental Services, Inc. for analysis of Polychlorinated Biphenyls and Volatile Organic Compounds, Semi-Volatile Organic Compounds, and Inorganics using the Toxic Characteristic Leaching Procedure.

J - Indicates that the associated numerical value is an estimated concentration.B - Analyte was also detected in the associated method blank at a concentration above the reporting limit.

Data Qualifiers:

mg/L - milligrams per liter.ug/L - micrograms per liter.ppm - parts per million.

G:\GE\GE_Pittsfield_ACO_Non-Res_ESA1-South\Correspondence\Post-Work\0041511324PWNTbl.xlsx

Page 2 of 2

1/8/2015

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barcode: *570539*barcodetext: SDMS Doc ID 570539