229 West 60th, New York, NY,10023

Upper West Side

Brownfield VOCs "Vapor Intrusion" "vapor barrier"

W. 60th St. Associates, LLC and West End Enterprises, LLC.  Sessanta condos.
Site Description[1][2] 
The Site is situated on an approximately 1.09-acre area bounded by West 61st Street to the north, West 60th Street to the south, the Track 4 area, a school, and a residential building to the east, and residential buildings, a school, and a commercial automobile parking garage to the west. The Site is located in the County of New York, New York and is identified as Block 1152 and former Lots 5, 8, 10, 11, 12, 13, part of 43, 52, 53, and 55 (current Lot 8 and part of Lot 13) on the New York City Tax Map. The street address of this Site is 229-251 West 60th Street and 218-240 West 61st Street, New York, NY 10023. The results of the remedial investigation, conducted at the Site during 2005, indicated several areas of concern within the Site, associated with past on-site uses. Former Site uses included a gasoline station, an automobile repair shop, an iron works, and automobile parking areas. Several aboveground storage tanks (ASTs) and the likelihood of several USTs were noted during the Phase I ESA. A commercial-industrial facility located east of former Lot 13, which produced buttons and fabric, was noted in the report. Records indicated that the facility utilized two petroleum storage tanks during its operation from 1926 to 2003. Three schools and a NYC Parks Department pool and a community center are present in the surrounding neighborhood. The proposed development on the Site includes the construction of a mixed-use residential and office complex with a parking garage. The proposed project will contain a total of 384,000 gross square feet of residential space (buildings would be a 27 story tower with two lower and mid-rise components of 9 and 14 stories), totaling approximately 505 units; 31,000 gross square feet of medical office space; court yard area with tennis court and an underground garage for 282 parking spaces. The remedial program was conducted in accordance with the March 2006 Remedial Work Plan and included excavation, removal of all soil within the Site boundary to the bedrock (8-22 feet deep) and transportation and disposal at off-site approved facilities. A total of twenty-six (26) tanks, including ASTs and USTs, were encountered during demolition, excavation, and remediation activities on the Site. All twenty-six tanks encountered on-site were removed for off-site disposal/recycling. Contaminated groundwater was removed for off-site disposal. A waterproofing layer has been installed beneath the new construction. The Remedial construction was completed in November 2007. A Final Engineering Report was approved on December 21, 2007 for a Track 1 cleanup for unrestricted Site usage. Redevelopment of the Site is on-going. A Certification of Completion was issued on December 21, 2007.

Site Environmental Assessment
June 2003 Phase I Environmental Assessment Report identified environmental conditions for the site and indicated evidence of up to 16 storage tanks (UST/ASTs) were present. These tanks were used for storing gasoline, fuel oils, lubricants, waste oils and other materials. These operations have resulted in environmental contamination. Remedial Investigation commenced in late summer of 2005 and was completed by January 2006. The Remedial Investigation Report (RIR) indicated the presence of seven on-site areas of concern. These areas include (1) three locations where underground storage tanks were discovered, (2) one location of elevated lead in the soil (Lot 43), (3) one location where acetone-contaminated soil (Lot 5) was detected, (4) one location of a suspected vaulted tank in a former basement, and (5) one location of petroleum-contaminated soil and groundwater. Groundwater contained benzene, two pesticides and several metals above groundwater standards. The primary contaminants and impacted media at the site include an area of petroleum-contaminated soil; historical fill containing atypical concentrations of contaminants (e.g. metals and SVOCs); and limited VOCs, pesticides and metals in groundwater. An Interim Remedial Measure (IRM) work plan was prepared in February 2006 to investigate and remove some of the areas of concerns identified in RI report. Exceedances of standards, criteria and guidance primarily include total VOCs (max: 8,900 ug/ kg), total SVOCs (max: 243,260 ug/ kg) and some metals (including lead (max: 2980 mg/kg), chromium (max: 278 mg/Kg), mercury (max: 2.5 mg/kg) and arsenic (max: 16.8 mg/ kg)) for soil and VOC's in groundwater (benzene at 20 ppb; toluene at 5.8 ppb, ethylbenzene at 8.3 ppb and xylene at 33 ppb) and one SVOC (naphthalene at 13 ppb), low levels of metals and low levels of two pesticides (4,4"-DDD and heptachlor epoxide). A Remedial Action Work Plan (RAWP) was prepared in April 2005 to address all contamination from this property including underground tanks and associated contaminated soils, petroleum-contaminated soils, historic fill and C & D debris. Remediation proceeded for Track 1 Cleanup standards for unrestricted usage. A total of 36,617 tons of petroleum-contaminated soil, 77 tons of characteristic hazardous waste (lead) soil, 43,961 tons of soil containing low-level contaminants, and 1,892 tons of soil containing rock and/or concrete pieces greater than 8 inches were excavated and disposed of off-site. Twenty-six (26) tanks, including ASTs and USTs, were encountered during demolition, excavation, and remediation activities on the Site. All 26 tanks were removed for off-site disposal/ recycling. Approximately 533,490 gallons of groundwater were pumped through the filter system and approximately 888,897 gallons were transported via tanker trucks for off-site disposal. All on-site sources of groundwater contamination were removed during remedial activities. The sub-grade slabs and foundation walls are waterproofed with a barrier and seal system, which also functions as a vapor barrier. All remediation is completed and a Final Engineering Report was approved on December 21, 2007. The site does not present a significant threat to the environment.

Site Health Assessment
Volatile and semi-volatile compounds are present in soils at this site. Exposure to groundwater is not likely since the area is served by public water. The site is paved and is currently used as a parking lot, therefore current exposure to contaminated soils is unlikely. Soils will be removed and excavated to bedrock thereby removing all site-related contamiantion. Soil vapor intrusion into the proposed building will be unlikely since all contamination is being removed as part of the remedy. A soil vapor survey was conducted at the perimeter of the site to evaluate the potential for off-site receptors to be effected. Low levels of volatile organic compounds were detected, but the concentrations do not pose a health concern.

Contaminants of Concern

Type of Waste Quantity
BENZ(A)ANTHRACENE UNKNOWN
BENZENE UNKNOWN
Chrysene UNKNOWN
HEPTACHLOR EPOXIDE UNKNOWN
NAPHTHALENE UNKNOWN
XYLENE (MIXED) UNKNOWN

admin, Debra Hall

Power_plant

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