884 Courtlandt Avenue, Bronx, NY 10451

Melrose

Brownfield SVOCs VOCs CVOCs "Vapor Intrusion"

NYC Dept of Housing and Preservation and Phipps Houses
Site Description[1] 
This Site was accepted into the BCP in March 2008 and pertains to the Courtlandt Corners II property located at 884 Courtlandt Avenue, New York City in Bronx County, and is identified as Block 2408 Lot 20 on the Bronx tax map. The entirety of Block 2408 is being redeveloped under the Courtlandt Corners project, however only Lot 20 is part of the BCP. The Site is bounded by Melrose Avenue to the east, East 161st Street (and the Courtlandt Corners I site) to the south, East 162nd Street to the north and Courtlandt Avenue to the west. The lot in the BCP is in the southeast corner of Block 2408. The site is 0.163 acres in size. The Site is currently owned by NYC Dept of Housing Preservation and Development, which has designated Phipps Houses as the developer of the Site. There is currently a gasoline service station (Getty) on the lot which is no longer in use. Previously, the site contained a residential building, an embroidery shop, and a filling station. Development plans are for affordable housing with ground level retail space. There is an open spill (NYSDEC spill #94-01207) on the site associated with the Getty station from 1994. As part of the remediation for the spill, a total of 400 tons of impacted soil has been removed; 12 USTs were removed and 2 new ones installed; an automated product recovery system was installed and activated (which removed 3,313 gallons of product between April 1995 and July 1999); and enhanced vapor fluid recovery (EVFR) has been performed (which has recovered 1,740 gallons of total liquids) since March 2000. Remedial investigation was already underway at the time this project was accepted into the BCP, and therefore an RI was completed outside of the BCP. Currently, the RI has been completed, and a combined remedial investigation report/remedial action work plan has been submitted and is being reviewed by the DEC and DOH. Elevated levels of BTEX, MTBE, naphthalene and some metals have been detected in the soil at levels exceeding unrestricted use SCGs. In the groundwater, elevated levels of VOCs, SVOCs, and metals have been detected at levels exceeding NYS groundwater standards. VOCs have been detected in soil vapor samples as well.

Site Environmental Assessment
There is currently a gasoline service station (Getty) on the lot which is no longer in use. Previously, the site contained a residential building, an embroidery shop, and a filling station. There is an open spill (NYSDEC spill #94-01207) on the site associated with the Getty station from 1994. As part of the remediation for the spill, a total of 400 tons of impacted soil has been removed; 12 USTs were removed and 2 new ones installed; an automated product recovery system was installed and activated (which removed 3,313 gallons of product between April 1995 and July 1999); and enhanced vapor fluid recovery (EVFR) has been performed (which has recovered 1,740 gallons of total liquids) since March 2000. Investigations of this site include a Phase II Environmental Site Assessment performed in May 2007 and a Remedial Investigation, performed in April 2008. Sampling detected levels of VOCs and SVOCs associated with petroleum in the soil and groundwater at concentrations exceeding unrestricted use soil cleanup objectives (UUSCOs) and groundwater standards. Metals and PCBs were also found in the soil and groundwater at concentrations exceeding UUSCOs. Elevated levels of VOCs associated with petroleum were detected in soil vapor samples as well. In the soil samples, VOC levels which exceeded unrestricted SCOs included benzene; toluene; ethylbenzene; total xylene; MTBE; 1,2,4-trimethylbenzene; and 1,3,5-trimethylbenzene. SVOCs detected at levels exceeding unrestricted SCOs include naphthalene; benzo(a)anthracene; benzo(a)pyrene; benzo(b)fluoranthene ; and chrysene. In the groundwater samples, exceedances of TOGS GA AWQS values for VOCs and SVOCs included benzene; toluene; ethylbenzene; xylene; MTBE; 1,2,4-trimethylbenzene; naphthalene; and phenol. Trichloroethene (TCE) was also detected at low levels in a few samples. Based on the Remedial Investigation findings, it appears that groundwater flow is in a north/northeast direction. Nine off-site monitoring wells have been installed to determine the extent of contamination associated with the spill on this site: four (4) in the sidewalk to the east/north of the spill, two (2) across Melrose Avenue to the east, one (1) to the north of 162nd Street, and two (2) in the sidewalk to the south of the spill. The most recent gauging event (conducted on March 29, 2008) revealed the presence of NAPL at two of the nine off-site wells (MW-11 and MW-16) both of which are located on the sidewalk along the north side of 161st Street (to the south of the site). Elevated levels of VOCs and SVOCs exceeding TOGS GA AWQS values have been detected in most of the off-site monitoring wells, with the exception of the two wells across Melrose Avenue to the east (MW-07 and MW-08) and the one to the north of 162nd Street (MW-13).

Site Health Assessment
On-site soil is contaminated with petroleum-related volatile organic compounds (VOC's), heavy metals, pesticides, and semi-volatile organic compounds . Since the site is currently covered with asphalt, concrete, and a vacant structure, exposure to contaminated soils is not expected. Groundwater is contaminated with petroleum-related VOCs, heavy metals, and chlorinated VOCs. However, exposure to site-related contaminants in drinking water is not expected since the area is served with public water. Soil vapor on the site contains elevated levels of petroleum-related VOC's. Therefore, soil vapor intrusion and subsequent inhalation exposure if buildings are constructed on-site in the future is a potential exposure pathway.

Contaminants of Concern
Type of Waste Quantity
ACETONE UNKNOWN
BARIUM UNKNOWN
BENZENE UNKNOWN
COPPER UNKNOWN
ETHYLBENZENE UNKNOWN
IRON UNKNOWN
LEAD UNKNOWN
MAGNESIUM UNKNOWN
MANGANESE UNKNOWN
MERCURY UNKNOWN
METHYL-TERT-BUTYL ETHER (MTBE) UNKNOWN
NAPHTHALENE UNKNOWN
PHENOL UNKNOWN
SODIUM UNKNOWN
TOLUENE UNKNOWN
XYLENE (MIXED) UNKNOWN
ZINC UNKNOWN

admin, Debra Hall

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