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EEA has launched an investigation and remediation on a New York State Department of Environmental Conservation (NYSDEC) Brownfield Redevelopment Site in the Fresh Meadows section of Queens. Under New York State’s Brownfield Cleanup Program (BCP), the 1.67-acre property, located on the northern side of Horace Harding Expressway and 183rd Street, was part of a strip mall containing a movie theater and a dry cleaner. The dry cleaner was the source of a significant chlorinated solvent spill. Groundwater was contaminated with tetrachloroethane (PEC).
Under the BCP, cleanups are fully protective of public health and the environment. Once the problem was identified, the site was labeled as a NYSDEC Brownfield Cleanup site. EEA was called in to conduct a remediation of the contaminated area, both on and off site.
The Clean Up The water table was lowered in order to isolate the contaminated material and begin removal. Sheet piling was installed to contain the area of the contamination. Approximately 15 feet of material was excavated and 3,000 cubic yards of saturated soils.
In order to remediate the site the source of the contamination was removed. The highest levels of contamination exist in the saturated zone at the groundwater, subsurface soil interface to a depth of. The overburden soil was stripped stockpiled on-site prior to delivery sheet piling to a depth of 40 feet from grade.
Once the water table was depressed, the contaminated soil was excavated and removed. By depressing the water table and temporarily staging the soil within the excavation, the soil did not require treatment prior to shipment. The soil was designated a RCRA hazardous waste, based upon analytical data. Approximately 2,400 cubic yards of contaminated soils was removed. Prior to backfilling with clean fill, seven soil samples were obtained from the large area and three from the smaller area. Each soil sample was analyzed for Volatile Organic Compounds by USEPA Method 8260. After the contaminated soil was removed, clean fill was brought to the site and placed in the excavated area and compacted in lifts to the level of the future foundations. EEA is currently completing the interim remedial clean up. The property will be developed for commercial and residential use in the near future. |
02/12/09