In-Situ Thermal Remediation Completed
SRSNE Superfund site successfully completed In-Situ Thermal Remediation (ISTR) of 56,670 cubic yards of NAPL impacted overburden soils. Between May 2014 and February 2015 ISTR removed over 496,400 pounds of VOCs from contaminated areas of soil at the site. ISTR used electrical heaters in the ground to vaporize the solvents, which were extracted with a vacuum system and treated on site. The treatment process created water vapor, which looked like steam coming out of the top of the treatment system stack.
Following thermal treatment, confirmatory soil samples had an average Total VOC concentration approximately two orders of magnitude below the soil cleanup goals required by the Remedial Design / Remedial Action Consent Decree were achieved, which equated to a 99.7% removal from soil.
TerraTherm is proceeding with demobilization from the site. We are proceeding onto the next phases of the RD/RA process which will include installation of a cap over part of the site, and optimization of the groundwater pumping and treatment system. After capping is complete, construction will begin on a new segment of the Farmington Canal Heritage Trail.
The contamination at the Solvents Recovery Service of New England, Inc. (SRSNE) Superfund Site (Site) is the result of the practices of SRSNE. Starting in 1955, companies all around New England that wanted to avoid dumping waste solvents into landfills started using SRSNE to distill their solvents, which resulted in most of the cleaned solvents being returned to the client companies. Distilling and re-using the solvents was an early “recycling” approach. The distillation process generated unusable solvent sludge that was legally placed in unlined lagoons on the property. SRSNE’s operation of the facility also resulted in numerous leaks and spills to the bare ground associated with loading and unloading tank trucks, transfer of solvents to storage tanks, issues during the distillation process, and improper handling and storage of drums.
EPA and the State of Connecticut took enforcement actions to compel SRSNE to clean up the facility and its operations. SRSNE failed to comply with these enforcement efforts, which resulted in the closure of the facility and significant financial settlements between SRSNE, EPA, and the State of Connecticut. After the death of SRSNE’s President and the bankruptcy of SRSNE, EPA approached the client companies, under the auspices of the federal “Superfund law”, to have them take on the investigation and remediation of the site. These former client companies organized as the SRSNE Site Group and have taken on the responsibility to fund the necessary site work.
The Remedial Design/Remedial Action (RD/RA) phase of cleanup is underway at the SRSNE Site.
This work is being performed by the SRSNE Site Group under a Consent Decree (CD) and Statement of Work (SOW). The CD was filed on October 30, 2008 with the United States District Court for the District of Connecticut in connection with Civil Actions No. 3:08cv1509 (SRU) and No. 3:08cv1504 (WWE). The CD was approved by the Court on March 26, 2009.
The SRSNE Site Group, comprised of companies that were former solvent-recycling customers of SRSNE, that have been working cooperatively with US EPA and CT DEEP, has been performing clean-up work at the Site since 1994. The final remedy for the Site is described in the 2005 Record of Decision (ROD) issued by the U.S. Environmental Protection Agency (USEPA).