The site is located at the western end of the College Point neighborhood in a mixed/residential/light industrial setting, at 111-01 14th Avenue, College Point, County of Queens. The site is approximately 6.76 acres and is identified as Block 4031and Lot 1 on the College Point Tax Map. The site is bounded by the East River on the west and north, by the 14th Avenue on the south, and 111th Street on the east. EDO began manufacturing operations at its College Point facility in 1925. Contamination of the soil and groundwater beneath the site was caused by the industrial/manufacturing activities conducted on the site in the past, which included manufacturing defense industry related products, e.g. sonar and navigational systems. EDO sold the property to Edgewater in 1996. Edgewater converted the property to multi-tenant mixed commercial/industrial use. Environmental site investigations included: Phase I and II Environmental Assessment (November 1994); Voluntary Cleanup Site Assessment (August 1996); and Supplemental Site Assessment (March 1998). Two areas of the site were remediated as part of the VCA. Cadmium and chromium impacted soils were removed from beneath the former plating room within the building and stabilization agents were added to remaining soils and groundwater in this area of the site. Lead impacted soils in the vicinity of the former Jet Test Cells outside the building were also excavated under the VCA. In addition, clean backfill was placed into the excavation and paved the area with new concrete floor. Remedial activities completed at the site were conducted in accordance with the NYSDEC-approved RAWP for the former EDO Corporation site (15 December 2000). The remedial goals included attainment of Recommended Soil Cleanup Objectives (RSCOs) for on-site soils for industrial use. Since residual contaminated soil and groundwater exists beneath the site, Engineering Controls and Institutional Controls (EC/ICs) are required to protect human health and the environment. The ECs include a composite cover system in the former plating room inside the building and the former Jet Test Cell area outside the building. The ICs include all provisions outlined in the Deed Restriction. An annual certification, by a qualified environmental professional, for evaluating the performance and effectiveness of the implemented ECs in reducing or mitigating contamination at the site will be submitted to DEC.
Site Environmental Assessment
Environmental site investigations included: Phase I and II Environmental Assessment (November 1994); Voluntary Cleanup Site Assessment (August 1996); and Supplemental Site Assessment (March 1998). ERM completed a Phase I Environmental Assessment of the property in November, 1994. The Phase I identified 14 potential areas of environmental concern (AECs) were categorized into three distinct groups: areas where aboveground and underground storage tanks exist or previously existed; areas where hazardous wastes and other chemicals were stored and/or used in manufacturing processes; and former plating area. ERM completed a Phase II Investigation in January, 1995 and issued a report in November, 1995. Investigatory activities included the decommissioning and closure of the industrial activities at the potential AECs identified in the Phase I assessment, with the exception of the former plating area. ERM prepared a Voluntary Cleanup Site Assessment Report in August, 1996. The assessment focused on the former plating room in Building No. 2 and the area immediately around the plating room, and included the decommissioning and closure of the equipment located in the former plating area. Analytical results from this investigation indicated cadmium concentrations in soil ranging from below laboratory detection limits to 68.9 ppm. Total chromium concentrations in soil ranged from 11.4 ppm to 10,300 ppm. Hexavalent chromium soil concentrations ranged from below laboratory detection limits to 3,200 ppm. The investigations revealed the presence of cadmium and chromium in soils and groundwater beneath the main building formerly used for plating operations at the Site, as well as to the south and adjacent to plating area. The following lists RSCOs and GA groundwater standard exceedances for all soil/ groundwater samples in the former plating area prior to the remedy. Contamination in the soil included (before implementation of the remedy): total chromium - up to 10,300 ppm (cleanup guideline - 10 ppm); hexavalent chromium - up to 3,200 ppm; total TCLP chromium - up to 35 ppm (threshold for hazardous waste - 5 ppm); cadmium - up to 2,490 ppm (cleanup guideline - 1 ppm). Contamination in the groundwater near the source area included: total chromium - up to 123,000 ppb (Class GA groundwater standard - 50 ppb); hexavalent chromium - up to 122,000 ppb; cadmium - up to 51 ppb (Class GA groundwater standard - 10 ppb). Monitoring wells located between the former plating area and the East River exhibit total chromium and hexavalent concentrations in ground water below the NYS ground water standards. In addition, ground water in this area is not used for potable or industrial purposes. The site was remediated in accordance with the scope of work presented in the NYSDEC-approved Remedial Action Work Plan dated 15 December 2000 and as detailed in the Addendum to the Final Remedial Action Report dated March, 2007. Remedial activities performed and implemented at the site include: excavation of soil/fill exceeding RSCOs; construction and maintenance of an engineered composite cover consisting of a concrete floor within the former plating area and an asphalt cover in the former Jet Test Cell Area; recording of a Deed Restriction; a Site Management Plan for long term management of residual contamination as required by the Deed Restriction; collection and analysis of end-point samples to evaluate the performance of the remedy with respect to attaining RAWP goals; appropriate off-site disposal of all material removed from the site; import of materials used for backfill and cover. Residual contamination remaining at the site will be handled through the combination of engineering and institutional controls (ECs/ ICs). An annual certification, by a qualified environmental professional, for evaluating the performance and effectiveness of the implemented ECs in reducing or mitigating contamination at the site will be submitted to DEC.
Site Health Assessment
Exposure to groundwater contamination is unlikely since the area is served by public water. Since the site is currently covered by pavement and buildings and contaminated soils are at depth, direct contact exposure to soil contamination is unlikely. The NYSDOH and the NYSDEC will evaluate the need to conduct additional investigations to determine the potential for soil vapor intrusion into the on-site buildings.
Contaminants of Concern
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