The site is located in an urban area of Queens County, NY. The site is mostly occupied by a two-story building, with a paved alleyway on one section of the east side of the building, and a paved right-of-way easement on the north side of the building used for vehicle parking. The site is in use as commercial office space and as a taxi leasing business. The immediate surrounding uses are commercial and industrial. A New York City high school is located approximately three hundred fifty feet to the south of the site. There are a few isolated residential properties located approximately five hundred feet to both the southeast and southwest along 44th Drive, and the closest primarily residential block is approximately seven hundred feet to the south along 45th Avenue. Prior uses that appear to have led to site contamination include metal plating. Contamination is believed to have entered the environment from one or more sumps previously located on-site. There is also the possibility that sewer pipes leading from the building may have leaked contamination to the soils and groundwater beneath the site. The site was listed on the NYS Registry of Inactive Hazardous Waste Sites in August of 2008, and an Interim Remedial Measure adressing contaminated groundwater is planned for 2009.
Site Environmental Assessment
Investigations conducted during the 2008 site characterization indicated a plume of chlorinated VOCs (primarily PCE) extending from the 21-03 44th Ave. site to the northern edge of the Technology High School one block to the south, and possibly beyond. Exceedances of standards, criteria, and guidance include PCE at 36,000 ug/l vs. a standard of 5 ug/l and chromium as high as 1,500 ug/l vs. a standard of 50 ug/l. Trichloroethylene, cis- 1,2 – dichloroethene and vinyl chloride also exceeded standards, however to a lesser degree. Contamination presents a significant threat to the environment as demonstrated by the magnitude and aerial extent of groundwater impacts. An IRM will be performed in 2009 to mitigate the impacts to groundwater from the source area believed present at the 21-03 44th Ave. property. An RI/FS is being planned.
Site Health Assessment
On- and off-site groundwater is contaminated with lead, chromium, hexavalent chromium and volatile organic compounds, primarily tetrachloroethene (PCE) and its breakdown products. The area is served by public water, thus exposure via ingestion of contaminated groundwater is not expected. Insufficient data exists for complete evaluation of potential exposures to other site-related contamination.
Contaminants of Concern
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