403 W 37th St & 501-505 9th Ave, NY, NY

Midtown

brownfield, CVOCs, VOCs, "Vapor Intrusion"

402 W 38th Street Corp.
Site Description[1] 
Location: The site is located at 403 West 37th Street and 501-505 9th Avenue in the Borough of Manhattan, New York County. Site Features: Currently, the site is vacant. An entrance roadway to the Lincoln Tunnel beyond the retaining wall shared with the site, is to the west. Current Zoning: The site is currently inactive, and is zoned for commercial use. The surrounding neighborhood is also commercial, with some residential. Historical Uses: A former iron works was identified on the Sanborn maps spanning the years from 1911 to 1930 on the south-west portion of the Site. From approximately 1930 to 1968 the site was home to a plumbing business as well as a painter. Site Geology and Hydrogeology: Groundwater is about 10 to 15 feet below the surface and, because it is diverted by the Lincoln Tunnel's retaining wall, generally flows to the northwest. Soils are mainly historic fill and sand.

Site Environmental Assessment

Nature and Extent of Contamination: Soil contains elevated SVOCs and metals indicative of historic fill. Historic fill appears to be about ten feet deep. SVOCs exceeding Restricted Residential SCGs include benzo-a-anthracene, benzo-a-pyrene, benzo-b-fluoranthene, benzo-k-fluoranthene, chrysene, dibenzo(a,h)anthracene, and Indeno(1,2,3-cd)pyrene. Several were found at levels approaching 50 ppm. Metals exceeding Restricted Residential SCGs include lead (maximum detection 9000 ppm vs Track 2 Restricted Residential Use SCG of 400 ppm) and barium (maximum 615 ppm vs 400 ppm.)Groundwater sampling showed contamination in one well for chlorobenzene (29 ppb)and 1,4-dichlorobenzene (97 ppb.)

Site Health Assessment
Direct contact with contaminants in the soil is unlikely because the majority of the site is covered with buildings and pavement. People are not drinking the contaminated groundwater because the area is served by a public water supply that is not contaminated by this site. Volatile organic compounds in the groundwater may move into the soil vapor (air spaces within the soil), which in turn may move into overlying buildings and affect the indoor air quality. This process, which is similar to the movement of radon gas from the subsurface into the indoor air of buildings, is referred to as soil vapor intrusion. Soil vapor samples will be collected during the remedial investigation to evaluate the potential for soil vapor intrusion to affect indoor air quality.

Contaminants of Concern
Type of Waste Quantity of Waste
BARIUM UNKNOWN
BENZ(A)ANTHRACENE UNKNOWN
BENZO(A)PYRENE UNKNOWN
BENZO(B)FLUORANTHENE UNKNOWN
CHLOROBENZENE UNKNOWN
LEAD UNKNOWN
  1. DEC Environmental Site Remediation Database.  Site Name: "Hudson Mews Property - Marty Fine Parcel".

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