868 Courtlandt Avenue, Bronx, NY, 10451

Melrose

Brownfield VOCs CVOCs "Vapor Intrusion"

NYC Dept of Housing and Preservation and Phipps Houses
Site Description[1] 
This Site entered the Brownfield Cleanup Program in March 2008 and pertains to the Courtlandt Corners I property located at 868 Courtlandt Avenue, New York City in Bronx County. It is identified as Block 2407 Lots 5, 8, 10, 11, and 12 on the Bronx tax map. The total size is approximately 0.29 acres. It is bounded by Courtlandt Avenue to the west, East 161st Street (and the Courtlandt Corners II BCP site) to the north, and vacant lots and Melrose Avenue to the east. Lot 5 is currently an auto repair shop and was used as a gasoline service station in the 1950's. Lots 8 and 10 have historically been used, and are currently being used, as parking lots. Lots 11 and 12 were used as an automobile repair shop from 1952-1978 and currently used as parking lots. Future use of the property is for commercial and residential uses including low to middle income housing. The Site is currently owned by NYC Dept of Housing Preservation and Development, which has designated Phipps Houses as the developer of the Site. Petroleum related contaminants have been detected at this site during the Remedial Investigation and Phase II site assessment. In Lot 5, VOCs, SVOCs, metals and pesticides have been detected in the soil and groundwater. In Lots 8, 10, 11, and 12, SVOCs, metals and pesticides have been detected in the soil and groundwater. VOCs were detected in soil gas samples throughout the site. There are 3 spills associated with this site: one open spill (NYSDEC spill #88-01261) due to a tank test failure on Lot 5; one open spill (NYSDEC spill #06-09002) due to free product observed in soil and groundwater on Lots 5 and 8; and one closed spill (NYSDEC spill #92-22552) due to odors. Four USTs, no longer in use, have been detected at Lot 5. 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.

Site Environmental Assessment
Former uses of this property include auto repair shops (on Lots 5, 11 and 12 of Block 2407) and a gasoline service station (Lot 5). Several spills are associated with Lot 5 which have resulted in petroleum contamination in both the soil and groundwater. There are 3 spills associated with this site: one open spill (NYSDEC spill #88-01261) due to a tank test failure; one open spill (NYSDEC spill #06-09002) due to free product observed in soil and groundwater on Lots 5 and 8 during the Phase II ESA in May 2007; and one closed spill (NYSDEC spill #92-22552) due to odors. Four USTs, no longer in use, have been detected in the subsurface of Lot 5. 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 elevated levels of VOCs and SVOCs in the soil and groundwater at concentrations exceeding unrestricted use soil cleanup objectives (UUSCOs). Metals and PCBs were also found in the soil and groundwater at concentrations exceeding SCOs, which appear to have originated from historic fill. Elevated levels of VOCs associated with petroleum were detected in soil vapor samples. Data indicate groundwater and soil contamination on the Site. On Lot 5 (currently an auto repair facility and historically a filling station), VOCs exceeding standards, criteria and guidance (SCGs) have been detected in the water, groundwater, and soil vapor including BTEX, acetone, MTBE, and 1,2,4-trimethylbenzene. SVOCs, metals and pesticides were detected as well. On the adjacent lots 8, 10, 11 and 12, SVOCs, metals and pesticides with concentrations exceeding SCGs were detected in the soil. VOCs were also detected in groundwater samples on Lot 8. Although VOCs were not detected in soil samples from Lot 8, it should be noted that free product (oil) was observed in soil borings on this lot. In the soil samples, VOC levels which exceeded UUSCOs include benzene, toluene, ethylbenzene, total xylene, and MTBE. SVOCs detected at levels exceeding UUSCOs include benzo(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene, benzo(k)fluoranthene, chrysene, and indeno(1,2,3-cd)pyrene. In the groundwater samples, exceedances of groundwater standards values for VOCs and SVOCs included benzene, ethylbenzene, toluene, total xylene, MTBE, and naphthalene. Based on the Remedial Investigation, it appears that groundwater flow is to the northeast. Two downgradient groundwater samples performed off-site to the north had elevated levels of VOCs. It is not clear whether this contamination is due to on site soil contamination or is due to an off-site source.

Site Health Assessment
On-site soil is contaminated with petroleum-related volatile organic compounds (VOC's), heavy metals, pesticides, and semi-volatile organic compounds. The site is a former auto repair shop, service station, and parking lot. Since the site is covered with asphalt and concrete, exposure to contaminated soils is not expected. Groundwater is contaminated with petroleum-related VOCs and heavy metals. 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 was found to have 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
1,2-DICHLOROETHANE UNKNOWN
ACETONE UNKNOWN
BENZENE UNKNOWN
BENZO(A)PYRENE UNKNOWN
BENZO(B)FLUORANTHENE UNKNOWN
BENZO[K]FLUORANTHENE UNKNOWN
CHLOROFORM UNKNOWN
CHROMIUM UNKNOWN
Chrysene UNKNOWN
ETHYLBENZENE UNKNOWN
indeno(1,2,3-cd)pyrene UNKNOWN
IRON UNKNOWN
LEAD UNKNOWN
MAGNESIUM UNKNOWN
MANGANESE UNKNOWN
MERCURY UNKNOWN
METHYL-TERT-BUTYL ETHER (MTBE) UNKNOWN
NAPHTHALENE UNKNOWN
TOLUENE UNKNOWN
TRICHLOROETHENE (TCE) UNKNOWN
XYLENE (MIXED) UNKNOWN
ZINC UNKNOWN

admin, Debra Hall

Power_plant

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