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Waste Site Cleanup & Reuse in New England
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 Wilmington,  Massachusetts
 Middlesex County
 Street Address: 51 Eames Street
 Zip Code: 01887

 EPA ID #: MAD001403104
 Site ID #:
 Site Aliases:

 Site Responsibility: Federal

 Proposed Date 09/14/2005
 Final Date 04/18/2006

Site Description
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The Olin Chemical facility encompasses a 53-acre property located at 51 Eames Street in Wilmington, Massachusetts. The inactive facility is completely fenced and is bounded on the north by Eames Street, on the east by Boston and Maine railroad tracks, on the south by the Woburn/Wilmington town line, and on the west by an inactive Boston and Maine railroad spur. Surrounding the property to the north, east and west are heavy and light industrial facilities, and to the south is a former municipal landfill for the City of Woburn. The closest residential areas are west of the Olin Chemical facility along Main Street and Cooke Avenue.

The Olin Chemical property was used for chemical manufacturing starting in 1953 by National Polychemicals, Inc. (NPI). Between 1953 and 1971, NPI was owned or operated by American Biltrite Rubber Co., Fisons Limited, and Fisons Corporation. In 1968, Stepan Chemical Corporation purchased NPI and operated the facility until it was purchased by Olin Corporation in 1980. The facility manufactured chemical blowing agents, stabilizers, antioxidants and other specialty chemicals for the rubber and plastics industry. The facility closed in 1986, but the property is still owned by Olin Corporation. Historical waste water disposal practices were a major source of the contamination associated with the Olin Chemical facility. Prior to 1970, all liquid wastes were discharged directly into several unlined pits and ponds in the central portion of the property, as well as into a man-made excavation called Lake Poly Liquid Waste Disposal Area (Lake Poly). In 1970, Stepan Chemical installed an acid treatment and neutralization system and new lined lagoons to replace the unlined pits and ponds. Treated wastes were released into the lagoons where calcium sulfate sludge settled out. The lagoons were periodically dredged and the sludge was deposited in a landfill in the southwest corner of the property (now known as the Calcium Sulfate Landfill). Residual liquid wastes were released to an unlined on-property ditch system until 1972. On-site waste disposal practices have resulted in groundwater contamination both on and off the Olin Chemical property, and in late 2002 resulted in the closure of the Town of Wilmington's municipal drinking water supply wells located in Maple Meadow Brook.

Threats and Contaminants
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Principal contaminants associated with the site groundwater include: ammonia, chloride, sodium, sulfate, chromium and N-nitrosodimethylamine (NDMA). The contamination in the aquifer extends 0.75 miles west from the Olin Chemical property to the former drinking water supply wells, and includes a complex mixture of inorganic and about 196 organic chemicals. NDMA has also been detected in several area private supply wells.

Principal contaminants detected in on-site soil include: trimethylpentenes, acetone, bis(2-ethylhexyl)phthalate, N-nitrosodiphenylamine, pesticides (including BHC compounds), aluminum, calcium, chromium, iron, sodium, chloride, ammonia, sulfate and aromatic extractable petroleum hydrocarbon (EPH) fractions. Higher concentrations are generally present only in soils greater than three (3) feet below ground surface (i.e., subsurface soils.)

Principal contaminants detected in site-related surface water and sediment include: trimethylpentenes, bis(2-ethylhexyl)phthalate, chromium and petroleum hydrocarbon compounds (EPH fractions.) Surface water and sediment contamination is associated with an on-site drainage ditch system, which is described as the south ditch, west ditch and east ditch.

Cleanup Approach
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Response Action Status
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Discovery 06/01/1980

Preliminary Assessment 10/01/1980

Site Inspection 10/01/1980

State Removal Action 08/23/2004

Proposal to NPL 09/14/2005

Finalized on NPL 04/18/2006

Focused RI Report 10/29/2007

Work Plan for RI/FS 08/14/2009

Response Alternatives Evaluation Report 11/23/2011

HPIT Phase 1 Report 01/31/2014

DAPL Pilot Report 11/07/2014

Enforcement HighlightsIn June 2007, EPA reached an administrative settlement agreement and order on consent (AOC) with a group of Potentially Responsible Parties (PRPs) for Remedial Investigation and Feasibility Study (RI/FS) activities at the site. A copy of the AOC is available via the "Links to Other Site Information" section below.

Environmental Progress
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Extensive work has been completed by Olin Corporation to control and contain wastes on-site, including construction of a slurry wall around the former waste pits, excavation of Lake Poly and other hot spots, operation of a pump and treat system for Plant B, and capping the Calcium Sulfate Landfill. Regular monitoring of area private wells continues. A field-scale groundwater extraction pilot system was constructed on private property adjacent to the Olin property and operated from November 2012 to May 2014. The purpose of this pilot test was to evaluate the efficacy of removal of dense aqueous phase liquid (DAPL) from the aquifer. The results indicate that DAPL can be physically removed from the aquifer in a controlled manner. During the pilot test, more than 1/2 million gallons of DAPL were removed and shipped off-site. These results will inform the ongoing studies.

Current Site Status
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In June 2007, EPA reached an administrative settlement agreement and order on consent (AOC) with a group of Potentially Responsible Parties (PRPs) to perform ongoing studies and reimburse EPA for future costs associated with regulatory oversight. Under the terms of this AOC, the PRPs have submitted an Interim Response Steps Work Plan to continue ongoing operation and maintenance activities; a Focused Remedial Investigation Report to document existing site conditions and identify data gaps; and a Remedial Investigation and Feasibility Study (RI/FS) Work Plan to outline further studies as a Superfund remedial investigation and feasibility study necessary to determine the full nature and extent of remaining contamination and evaluate remedial alternatives. These documents have been reviewed and approved by EPA. Field studies consistent with the RI/FS work plan are largely complete. Nearly 80 soil borings were completed across the Olin property. More than 200 monitoring wells were sampled, and several additional wells were installed. Surface water and sediment samples were collected from water bodies on and off the Olin property, and a toxicity test was performed in sediments. A Draft Remedial Investigation Report for soil, sediment and surface water was submitted by the PRPs in 2011, and revised in 2014. A final version will be issued in the Summer of 2015. While significant evaluation of groundwater, including DAPL, has been completed, the PRPs will conduct additional field work during 2015 to address gaps primarily associated with identifying the full extent of contamination in certain downgradient areas. About 20 area private supply wells are being monitored on a regular basis for NDMA. Operation of the Plant B groundwater treatment system continues. Monitoring of the slurry wall containment area continues, including the performance of hydraulic pulse interference testing. A DAPL extraction pilot study was completed in 2014. EPA issued a Technical Assistance Grant (TAG) in 2008 to a local citizens group (Wilmington Environmental Restoration Committee) to oversee investigation and remedial activities. This TAG group remains actively engaged and has retained the consulting firm CDM Smith. Local officials for the Town of Wilmington have also remained actively engaged in EPA's investigation and has retained the consulting firm GeoInsight, Inc. A copy of the AOC and other key site documents are attached below.

Site Photos
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SDMS 486900 SDMS 486901 SDMS 486902 SDMS 486903 SDMS 576493 SDMS 576494 SDMS 576495 SDMS 578386

Links to Other Site Information
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Disclaimer Instructions about PDF

Newsletters & Press Releases:
Press Releases about this project  
Public Meeting Presentation, October 19, 2009 (6.91 MB)  
Public Meeting Questions and Answers, November 15, 2010 (261 KB)  
Public Meeting Materials, November 30, 2011 (3.97 MB)  

Federal Register Notices:
Proposed NPL Listing  

Administrative Records:
Administrative Record File Index for Engineering Evaluation/Cost Analysis (EE/CA) Approval Memorandum for the Non-Time Critical Removal Action (NTCRA), OU3, June 2011 (672KB)  

Reports and Studies:
Draft Focused Remedial Investigation Report, October 1, 2007 (opening file is 4.84 MB with link to PDF file)  
Final Interim Response Steps Work Plan, August 8, 2008 (29 MB)  
Final Remedial Investigation/Feasibility Study (RI/FS) Work Plan - Volume 1 of 4, August 14, 2009 (12.0 MB)  
Final Remedial Investigation/Feasibility Study (RI/FS) Work Plan - Volume 2 of 4, August 14, 2009 (2.33 MB)  
Final Remedial Investigation/Feasibility Study (RI/FS) Work Plan - Volume 3A of 4, August 14, 2009 (Opening file is 31.1 MB with a link to other file)  
Final Remedial Investigation/Feasibility Study (RI/FS) Work Plan - Volume 3B of 4, August 14, 2009 (Opening file is 30.0 MB with a link to other file)  
Final Remedial Investigation/Feasibility Study (RI/FS) Work Plan - Volume 4 of 4, August 14, 2009 (20.1 MB)  
Hydraulic Pulse Interference Test Report, January 31, 2014 (2.27 MB)  
Dense Aqueous Phase Liquid (DAPL) Extraction Pilot Study Performance Evaluation Report, November 7, 2014 (7.38 MB)  

Decision Documents:
View Records of Decision (RODS) on-line (EPA HQ)  
Administrative Settlement Agreement and Order on Consent (AOC) with Statement of Work (SOW) for the Remedial Investigation/Feasibility Study (RI/FS), June 28, 2007 (7.35 MB)   
Engineering Evaluation / Cost Analysis (EE/CA) Approval Memorandum for Non-Time Critical Removal Action (NTCRA), OU3, May 26, 2011 (1MB)  

Other Links:
NPL Site Narrative at Listing:  
Site Progress Profile  

Site Repositories
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Wilmington Memorial Library, 175 Middlesex Avenue, Wilmington, MA 01887 (978) 658-2967

OSRR Records and Information Center, 1st Floor, 5 Post Office Square, Suite 100 (HSC), Boston, MA 02109-3912 (617) 918-1440

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EPA Remedial Project Manager: Jim DiLorenzo
Address: US Environmental Protection Agency
5 Post Office Square, Suite 100
Mail Code OSRR07-4
Boston, MA 02109-3912
Phone #: 617-918-1247
E-Mail Address: dilorenzo.jim@epa.gov

EPA Community Involvement Coordinator: Sarah White
Address: US Environmental Protection Agency
5 Post Office Square, Suite 100
Mail Code ORA20-1
Boston, MA 02109-3912
Phone #: 617-918-1026
E-Mail Address: white.sarah@epa.gov

State Agency Contact: Joe Coyne
Address: Mass DEP
1 Winter Street
Boston, MA 02108
Phone #: 617-348-4066
E-Mail Address: joseph.coyne@state.ma.us


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Last updated on Wednesday, November 4th, 2015
URL: http://www.epa.gov/region1/superfund/sites/olin