The site is located at 132-20 Merrick Boulevard in Springfield Gardens, Queens County, New York 10078 and is designated as Tax Lot 44 in Block 12999 on the Tax Map of the City of New York, Queens County. The Site is located in a light industrial area, which includes commercial and residential uses. The Site is bounded on the north by Merrick Boulevard, on the south by 137th Avenue, on the east by Belknap Street, and on the west by the Long Island Railroad tracks. The Site was formerly operated by Knomark Inc. which manufactured various products, including fabric softeners, toilet bowl cleaners, fabric dyes and shoe polish from 1957 to 1988. Knomark’s manufacturing process involves use and storage of solvent such as tetrachloroethene (PCE). United Parcel Services (UPS) leased the site from 1988 to 1998 as a processing and distribution center for shipped packages. Currently the site has been redeveloped and is operating as a Home Depot store. Various investigations have been completed at the site by different consultants in 1988, 1989, 1990, and 1999. Source removal was done in late 1980’s through contaminated soil, dry well, tanks and drain removal as part of the Knomark Inc.’s site operation closure cleanup. Additional tank closures (USTs and AST) were done in 1998. The Volunteer has submitted and the Department has approved a Remedial Action Work Plan (RAWP) dated October 1999 which involves installation of an air sparing and soil vapor extraction (AS/SVE) system to remove chlorinated solvents detected in the shallow groundwater. Implementation of the RAWP began in 2000. The AS/SVE system was operated from 2002 to 2005. As of this update, NYSDOH has requested a soil vapor survey around the site perimeter.
Site Environmental Assessment
Investigations conducted at the site (1988, 1989, 1990, and 1999) included the collection of soil vapor samples, indoor air samples, subsurface soil and/or groundwater samples. These investigations have found: • Chlorinated solvent (particular tetrachloroethene, or PCE) is present in shallow groundwater (about 17 to 60 feet below grade) with concentration above the NYS groundwater quality standards. The highest PCE levels were found down gradient or within the immediate vicinity of former chemical drum storage area, drywells (removed), and chemical storage tanks. PCE level were as high as 6600 ppb in 1989 sampling, 870 ppb (max) in 1999; • No VOCs or metals were found in soil samples at concentrations above applicable soil cleanup objectives; • Site history indicated that PCE contamination found at the site is related to Knomark Inc. operations at the site which included drywells, and associated chemical storage tanks; • Chemical storage tanks, petroleum USTs and ASTs and associated piping found at the site have been removed as part of 1988 Knomark site cleanup and 1998 tank closures. • Results of the 1990, and 1999 groundwater sampling indicated the presence of PCE in upgradient wells, which suggests that an off-site source has contributed to on-site contamination. • Jamaica supply well (in service in 1999) is located 3500 feet down gradient of site. • Solvent levels in the deep groundwater did not exceed NYS groundwater standards. Elevated concentrations of solvents detected in the deeper wells most likely reflect a regional groundwater problem. Volunteer submitted and department approved a Remedial Action Work Plan (RAWP) dated October 1999, which involved installation of an AS/SVE system at the site to remediate the shallow groundwater. The AS/SVE system was operated from 2000 to 2005.
Site Health Assessment
Exposures from ingestion of groundwater are not expected as public water serves the area. NYSDOH and NYSDEC will be evaluating the need to conduct additional investigations to determine the potential for soil vapor intrusion into structures on or near the site.
Contaminants of Concern
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