AUGUST 16, 2023 - ADMINISTRATIVE SETTLEMENT LANDFILL SUPERFUND SITE ) AGREEMENT AND ORDER ON
CONSENT FOR REMEDIAL DESIGN
The Respondents completed a Remedial Investigation/Feasibility Study (RI/FS) at the Site in September of 1992.
Results from the 1992 RI indicated that soil and groundwater had been contaminated via migration of several chlorinated volatile organic compounds (CVOCs) from landfill waste, primarily from the YTA, to groundwater in concentrations exceeding state criteria and federal maximum contaminant levels. CVOCs include TCE, Tetrachloroethylene (PCE), and vinyl chloride, among others?all of which are hazardous substances.
The human health risk assessment in the RI identified unacceptable risks to human health from exposure to soil and ingestion of groundwater. TCE and vinyl chloride are human carcinogens, and PCE is a likely human carcinogen.
The Site was listed on the National Priorities List (NPL) by EPA pursuant to CERCLA ? 105, 42 U.S.C. ? 9605, on August 30, 1990, 55 Fed. Reg. 35502.
The EPA selected a remedy for the Site in a Record of Decision (ROD) on September 28, 1992. The selected remedy called for: a groundwater extraction system that involved treatment by air stripping and granular activated carbon and reinjection into the aquifer; installation of a clay/soil cap over the YTA; and institutional controls, among other elements.
On July 26, 1994, the EPA issued to Respondents a Unilateral Administrative Order (UAO), pursuant to Sect