285 E. 138th St, Bronx, NY 10454

Mott Haven

brownfield, CVOCs, VOCs, "Vapor Intrusion"

Borinquen Court HDFC
Site Description[1] 
Location: The site is +/- 1.8 acres, located at 285 East 138th St. in the Bronx. The Site is bordered on the west by the intersection of Morris and 3rd Avenues, to the north by East 139th St., to the east by residential buildings and the NYC Police Department 40th Precinct, and to the south by East 138th St. Properties surrounding the site are primarily residential, with some commercial and industrial uses. Site Features: The Site is currently occupied by a 7-story residential building which houses low-income senior citizens. Historic Uses: Former uses on the Site include a gasoline filling station with five 550-gallon underground storage tanks (USTs), which occupied the southwest corner of the property for at least 40 years prior to 1968. A parking garage and auto repair facility with 2 USTs occupied the north-central part of the site from at least 1935 through 1978. A metal works was located on the southeast portion of the site from 1951 through 1978, and a mattress manufacturing factory was located on the northwest part of the site from 1944 through 1978. Geology and Hydrogeology: During the 2011 remedial investigation (RI), soils encountered consisted mainly of clayey sand to silt mixtures. Refusal was encountered in one of the soil borings (SB-01) at 20 feet below ground surface (bgs). All other borings were completed to 25 feet bgs without encountering bedrock. There are no significant surface water bodies in the vicinity of the Site. Stormwater runoff drains entirely via sheet flow and is managed via drywells and New York City sewers. During MACTECÂ’s Limited Phase II Environmental Site Assessment, two borings were converted into temporary wells. One well was screened between 14 and 19 feet bgs and was a good groundwater producer. The other well was screened between 24 and 28 feet bgs and was a poor groundwater producer. On-Site groundwater levels measured over the course of the RI project confirm the depth to groundwater to be in the range of approximately 13 to 17 feet bgs with flow toward the southwest. A Brownfield Cleanup Agreement for this site was executed on June 28, 2011.

Summary of Project Completion Dates
Projects associated with this site are listed in the Project Completion Dates table and are grouped by Operable Unit (OU). A site can be divided into a number of operable units depending on the complexity of the site and the number of issues associated with a site. Sites are often divided into operable units based on the media to be addressed (such as groundwater or contaminated soil), geographic area, or other factors.

Site Environmental Assessment
Nature and Extent of Contamination: Based on the investigations conducted to date, known contaminants including chlorinated solvents, semi-volatile organic compounds (SVOCs), metals, pesticides and other volatile organic compounds (VOCs) are present in the subsurface. These contaminants are impacting soil, groundwater, and soil vapor. Previous investigations included a Phase I Environmental Site Assessment and a Remedial Investigation. Soil: The concentrations of metals (barium, copper, mercury, lead and zinc), 4,4Â’-DDT, toluene, ethylbenzene and PAHs exceeded the UUSCOs in the samples collected from 0 to 10 feet in four borings installed across the Site (SB-04, SB-08 and SB-09). The concentrations of 4,4Â’-DDE, 4,4Â’-DDT, lead and PAHs exceeded UUSCOs in the 10-20 foot interval in only three borings (SB-04, SB-06 and SB-10). Ethylbenzene ranged from 0 to 1.4 ppm (restricted residential SCO of 41 ppm, Groundwater Protection SCO of 1 ppm) and toluene ranged from 0 to 1.1 ppm (restricted residential SCO of 100 ppm). Groundwater: VOCs detected in groundwater samples collected were tetrachloroethene (PCE), trichloroethene (TCE), cis-1,2-dichloroethene (cisi-DCE), ethylbenzene, meta- (m)/para- (p) xylene and iso-propylbenzene. PCE ranged from 0 to 19 ppb, TCE ranged from 0 to 25 ppb, cis-1,2-DCE ranged from 22 to 43 ppb, m/p-xylenes ranged from 0 to 19 ppb, and propylbenzene ranged from 0 to 11 ppb. Soil Vapor: PCE was detected in three out of the four soil vapor samples and TCE was detected in only one sample at 2 ug/ m3. PCE ranged from 0 to 75 ug/ m3. Based on this data, soil vapor intrusion into on-site buildings is not occurring and no mitigation is necessary. NYSDEC and NYSDOH have determined that this site does not pose a significant threat to the environment or public health.

Site Health Assessment
People who dig in landscaped areas may come into contact with contaminants in soil. Contact with contaminants located at depth is unlikely since a majority of the site is paved or covered with building foundations. People are not drinking the contaminated groundwater because the area is served by a public water supply that is not affected by this contamination.

Contaminants of Concern
Type of Waste Quantity of Waste
BENZO(A)PYRENE UNKNOWN
BENZO(B)FLUORANTHENE UNKNOWN
DDE UNKNOWN
DDT UNKNOWN
ETHYLBENZENE UNKNOWN
indeno(1,2,3-cd)pyrene UNKNOWN
LEAD UNKNOWN
M-XYLENE UNKNOWN
MERCURY UNKNOWN
P-XYLENE UNKNOWN
TETRACHLOROETHYLENE (PCE) UNKNOWN
TRICHLOROETHENE (TCE) UNKNOWN
  1. DEC Environmental Site Remediation Database.  Site Name: "Borinquen Court".

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