685, 700, & 708 First Ave, New York, NY 10016

Midtown

VCP VOCs "Vapor Intrusion" Brownfield MGP

ConEd and TRC Companies, Inc.
Site Description[1][2][3]  
TRC Companies, Inc. (TRC) entered into a Voluntary Cleanup Order with the New York State Department of Environmental Conservation (NYSDEC) on June 27, 2001 for remediation of the First Avenue Properties, including the 685, 700, and 708 First Avenue Properties. Con Edison contracted with TRC Companies, Inc., to assume the liability and responsibility for abatement, decommissioning, demolition and remediation of the site.

The Parking Lot property at 685 1st Ave consists of 1.1 acres located on the western side of First Avenue, just west of the East River and FDR Drive and south of the UN Building in a highly developed commercial/ residential area between East 39th and East 40th Streets. The Parking Lot is currently used for parking. Formerly, Con Edison used the site as a gasoline filling station and/or parking facility for maintenance and service vehicles from 1980 to 2001. Portions of the site were used by an upholstery and mattress factory from 1929 until the 1960’s. A United Parcel Service sorting center and garage was located on the site as early as 1950, and all former on-site structures were removed by 1970.

Environmental impacts to soils, bedrock and groundwater are related to leaking gasoline USTs used for refueling Con Edison vehicles. TRC has investigated environmental conditions at the site pursuant to a DEC-approved Supplemental Soil Investigation Work Plan, dated March 2001. Additional work was undertaken pursuant to a DEC-approved Interim Remedial Measures (IRM) Work Plan, dated July 2001; and DEC-approved IRM Work Plan Supplements 1 and 2, dated October 2001. The investigations found elevated levels of volatile organic compounds (“VOCs”) in soil, weathered bedrock and bedrock groundwater. Under the DEC-approved IRM Work Plan Supplement 2, dated October 2001, TRC excavated and disposed of VOC-contaminated soil and weathered bedrock from November 2001 to March 2002 and also initiated treatment of contaminated groundwater via the application of Oxygen Release Compound (ORC®). Soil sampling during the November 2001- March 2002 IRM activities detected additional VOCs and lead in shallow soils. These results, plus the results from the completion of IRM activities, are reflected in a Final Report for Interim Remedial Measures (IRM) Work Plans, in conjunction with the Remediation Work Plan, dated July 2002. TRC completed the environmental cleanup work pursuant to the NYSDEC-approved Remediation Work Plan. The Remediation Work Plan for this site includes: (1) removing remaining shallow soil and weathered bedrock containing elevated levels of VOCs and lead; and (2) continued treatment of VOCs in groundwater with ORC® or other DEC-required remediation. Institutional control such as a deed restriction for groundwater will be required. The Final Report and OM&M Work Plan were approved in a letter dated November 2, 2004. The deed restrictions were filed on May 19, 2008. Additional site information can be found in the UIS under the BCP Site number C231013.

The 708 property consists of 2.0 acres located just west of the East River and FDR Drive and south of the UN Building in a highly developed commercial/ residential area between East 40th and East 41st Streets. The site was occupied by a 400,000 square feet 10-story Con Edison service building and two industrial buildings and, from the 1920's to 2001, was used as office space, electrical operations, a locker room, a test laboratory and parking. The building was constructed in 1924 and demolished (under the VC Order) in 2003. Prior to the construction of these buildings, from the 1890's to 1923, portions of the site were used for manufactured gas plant operations.

TRC has investigated environmental conditions at the site pursuant to a DEC-approved Supplemental Soil Investigation Work Plan, dated March 2001. Additional work was undertaken pursuant to a DEC-approved Addendum to the Supplemental Soil Investigation Work Plan, dated October 2001. The investigation found elevated levels of volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs) and metals in soils. In groundwater, slightly elevated levels of VOCs were found. These results are reflected in a Supplemental Soil Investigation Final Report, in conjunction with the Remediation Work Plan, dated January 2002. TRC completed an environmental cleanup pursuant to the NYSDEC-approved Remediation Work Plan. The Remediation Work Plan for this site included: 1) decommissioning and removing all underground storage tanks and associated structures; 2) excavated and offsite disposal of all on-site soils above the development depth (16 feet below ground surface, or to the groundwater or the bedrock, whichever is shallower); 3) excavation and offsite disposal of contaminated soils in the UST area down to a depth of 39 feet followed by application of ORC; and 4) monitored natural attenuation of VOCs in groundwater. In addition, based on the final post remediation sampling results, institutional controls, such as a deed restriction, will be required. The deed restrictions were filed on May 19, 2008. Additional site information can be found in the UIS under the BCP Site number C231013.

The 700 First Avenue Property is currently owned by Consolidated Edison Companies of New York, Inc. (Con Edison) and is also known as the Waterside Generating Station. The Waterside Generating Station parcel consists of 5.4 acres located just west of the East River and FDR Drive and south of the UN Building in a highly developed commercial/ residential area between East 38th and East 40th Streets. Since 1910, this site has been used as an oil/gas fired steam and electricity generating facility until it was shut down in May 2005. In the late 1800s this property was used as a coal yard and wood mill, a storage yard and a MGP facility. By 1910, the former MGP structures on the site had been demolished, and the current on-site structures (Waterside Station No. 1 and No. 2) had been built. The property originally extended to the historical banks of the East River. Construction of the FDR Drive and Marginal Street added fill beyond the former eastern side of the property changing the area to its current dimensions.

TRC has investigated environmental conditions at the site pursuant to a DEC-approved Supplemental Soil Investigation Work Plan, dated February 2001, and a Supplemental Soil Investigation Work Plan Addendum dated March 2002. The investigation found elevated levels of polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs) and metals in soils. In groundwater, several VOC, PCB and PAH compounds and metals were detected at concentrations exceeding NYSDEC Class GA water quality standards. These results are reflected in a Supplemental Soil Investigation Final Report, along with the Remediation Work Plan, dated September 2003. This property is currently undergoing demolition and has not been remediated to date, however, the preferred final remedy for this site calls for: 1) removing aboveground and subsurface structures; 2) excavated and offsite disposal of all on-site soils above the development depth (16 feet below ground surface, or to the groundwater or the bedrock, whichever is shallower); and 3) groundwater monitoring in accordance with NYSDEC requirements. Based on sampling results in the Supplemental Soil Investigation Final Report, dated September 2003, a deed restriction for groundwater below Development Depth will be required. FER and SMP approval letter were issued May 27, 2008. DEC approved the Tunnel Closure report on July 14, 2008. As of July 17, 2008, TRC returned possession of WGS (700 First Avenue) to the developer (ERRC). To date, the deed restrictions have not been filed. Additional site information can be found in the UIS under the BCP Site number C231013.

Site Environmental Assessment
The investigations at 685 1st Ave found elevated levels of volatile organic compounds in soil, weathered bedrock and bedrock groundwater. All soil on the site, above the development depth (16 feet below ground surface, or to the groundwater or the bedrock, whichever is shallower), was excavated and disposed offsite. In addition, ORC® was added to the soil and bedrock following excavation and continues to be treated under an OM&M Plan to address VOC-contaminated groundwater on the site. Institutional controls, such as a deed restrictions for groundwater below the development depth, were filed on May 19, 2008.

The investigation at 708 1st Ave. found elevated levels of volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs) and metals in soils. In groundwater, slightly elevated levels of VOCs were found. All soil on the site, above the development depth (16 feet below ground surface, or to the groundwater or the bedrock, whichever is shallower), was excavated and disposed offsite. In addition, contaminated soils in the UST area were excavated and disposed offsite down to a depth of 39 feet, followed by the application of ORC. Institutional controls, such as deed restrictions, are required below the development depth and were filed on May 19, 2008.

The investigation at 700 1st Ave found elevated levels of polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs) and metals in soils. In groundwater, several VOC, PCB and PAH compounds and metals were detected at concentrations exceeding NYSDEC Class GA water quality standards. All soil on the site, above the development depth (16 feet below ground surface, or to the groundwater or the bedrock, whichever is shallower), will be excavated and disposed offsite. Institutional controls, such as deed restrictions, will be required below the development depth. To date, these deed restrictions have not been filed.

Site Health Assessment
Contact with contaminants in soil is unlikely as contaminated soil was excavated to bedrock and disposed offsite. Exposures to site-related contaminants in water is not expected as the area is served with public water. Inhalation of contaminants in soil vapor is not likely as the proposed building construction will contain a parking garage on the basement level which will have adequate ventilation to mitigate any potential soil vapor intrusion into the building.

admin, Debra Hall

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