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ENB - Region 3 Notices

Public Notice

Voluntary Cleanup Agreement
Notice of Availability for Comment
VCP # 00538-2, Con Edison White Plains MGP, 12 Water Street, White Plains, New York

County: Westchester

Lead Agency:
New York State Department of Environmental Conservation (NYS DEC)

Project Title:
Availability of Voluntary Cleanup Project Remedial Action Work Plan (RAWP)
Con Edison White Plains MGP
12 Water Street, White Plains, New York

Site ID No: V-00538-3

Name of Volunteer: Consolidated Edison Company of New York, Inc., 31-01 20th Avenue, Long Island City, NY 11105-2048

Project Location: The site is located near the edge of downtown White Plains, Westchester County. The address of the central portion of the site is 12 Water Street. The site is bounded by Water Street to the north, New Street to the South, and North Lexington Avenue to the west. It is bounded to the east by a parking lot which is located over the former road bed of Spring Street.

Operable Unit 1 (OU1) is defined as including the Saint John the Evangelist Roman Catholic Church and Elementary School and the Southern Relief Holder on the main MGP site. The holder is the only MGP structure located on the southern half of the block, and was removed by a 2004-2005 Interim Remedial Measure (IRM). St. John's occupies approximately 1.75 acres and is located across the street to the south of the aforementioned holder. There is no record of any MGP activity on the St. John's Property. Operable Unit 2 (OU2) addresses the remainder of the MGP site.

Brief Project Description: The Remedial Investigation identified the presence of coal tar in the subsurface soil. Contaminants of concerns in the tar include polycyclic aromatic hydrocarbons (PAHs) and the volatile compounds benzene, toluene, ethylbenzene and xylene (BTEX). Coal tar is present in the subsurface of the plant site (OU2) near historic MGP structures. This contamination appears to have migrated south, west and vertically down from these structures. The relief gas holder foundation which is part of OU1 was heavily contaminated with MGP tar, and was removed 2004-2005. In addition to the excavation, a cutoff wall and recovery wells were installed.

A remedial investigation for the Saint John the Evangelist Roman Catholic Church and Elementary School found that a thin seam of MGP tar has migrated under the St John's property at a depth of approximately 36 to 43 feet below the basement floor (which is in turn at least 10 feet below grade) and 52-60 feet below ground surface south of the building. Deep groundwater (close to the tar) is impacted but shallow groundwater is not. Furthermore, site-related contamination was not detected in sub-slab soil vapor samples from directly beneath the school or the air samples collected inside the school.

The Proposed Remedy at this Site Will Include:

1. MGP source materials remaining within OU2 will be treated using in-situ solidification (ISS). This will create a low permeability cement monolith which will effectively isolate the MGP contamination from human contact and the environment, eliminating potential exposure pathways. Implementing ISS at this site require conducting a treatability study, and pre-excavating to clear obstructions and to allow for soil expansion. Following the actual solidification post-mix sampling will be conducted to verify effectiveness.

2. The area defined as OU2 will be covered with pavement, buildings, or a minimum of one foot of clean soil, to prevent human contact with residual contamination. A demarcation layer will be provided between the clean soil and the underlying low permeability cement monolith.

3. Monitoring: A system of wells will monitor the contamination remaining in the ground to document the extent of groundwater contamination and ensure that contamination does not spread laterally. Additional wells will be provided within the area of groundwater contamination on the St. John's property to monitor the shallow, intermediate and deep groundwater. The focus of this monitoring will be to ensure that the layer of clean groundwater above the tar seam, which serves to prevent generation of soil vapor contamination, remains in its current uncontaminated state.

4. Imposition of institutional controls, in the form of environmental easements for both the property owned by Con Edison (OU1 and OU2) and the 12 Water Street property (OU2), would require (a) limiting the use and development of the property to commercial/industrial use; (b) compliance with the approved site management plan; (c) restricting the use of groundwater; and (d) the property owner to complete and submit to the Department a periodic certification of institutional and engineering controls.

5. Development of a site management plan which would include the following institutional and engineering controls: (a) management of the final cover system to restrict excavation. Excavated soil would be tested, properly handled to protect the health and safety of workers and the nearby community, and would be properly managed in a manner acceptable to the Department; (b) continued evaluation of the potential for vapor intrusion for any buildings developed on the site, including provision for mitigation of any impacts identified; (c) monitoring of groundwater and NAPL as provided above; (d) restricting use of the property owned by ConEdison and the 12 Water Street Property to commercial/industrial only; (g) provisions for the continued proper operation and maintenance of the components of the remedy.

6. The property owner would provide a periodic certification of institutional and engineering controls, prepared and submitted by a professional engineer or such other expert acceptable to the Department, until the Department notifies the property owner in writing that this certification is no longer needed. This submittal would: (a) contain certification that the institutional controls and engineering controls put in place are still in place and are either unchanged from the previous certification or are compliant with Department-approved modifications; (b) allow the Department access to the site; and (c) state that nothing has occurred that would impair the ability of the control to protect public health or the environment, or constitute a violation or failure to comply with the site management plan unless otherwise approved by the Department.

For more information: Site documents, including the Remedial Investigation Reports, Remedial Action Work Plans, and related Fact Sheets can be reviewed at the White Plains Public Library, 100 Martine Avenue, White Plains, NY 10601, Phone: (914) 422-1400.
Hours of Operation: M 10-9, T 10-9, Wed 10-9, Th 10-6, Fri 10-6, Sat 1-5, Sun (Winter) 1-5.

Questions or comments can be directed to: William Ottaway, P.E., NYS DEC, Division of Environmental Remediation, Remedial Bureau C, 625 Broadway, 11th Floor, Albany NY, 12233-7014. Phone: (518) 402-9662, Fax: (518) 402-9679, E-mail: wsottawa@gw.dec.state.ny.us.

For individuals with health-related concerns, contact: Mr Joseph Crua, NYS DOH, Flanigan Square, 547 River Street, Troy, New York 12180-2216, Phone: (518) 402-7880.

Positive Declaration

Westchester County - The City of Yonkers Planning Board, as lead agency, has determined that the proposed South Westchester Executive Park (SWEP) Expansion / Seton Pediatric Center may have a significant adverse impact on the environment and a Draft Environmental Impact Statement must be prepared. The action involves the amendment of comprehensive development plan (CDP) for the SWEP Planned Executive Park (PEP) zoning designation. The existing plan first approved in the late 1970's contained approximately 1.2 million square feet of mixed use space. The applicant's current proposal is to increase the CDP by approximately 800,000 square feet. Approximately 250,000 square feet of this proposal is for proposed Elizabeth Seton Pediatric Center, a child care facility for handicapped children. Public scoping will remain open until January 11, 2008. The project is located at 900-1085 North Broadway and 1-5 Executive Boulevard in the City of Yonkers, New York.

Contact: Lee Ellman, City of Yonkers Plannning Board, 87 Nepperhan Avenue, Suite 320, City of Yonkers, NY 10701, Phone: (914) 377-6558, E-mail: lee.ellman@cityofyonkers.com.

Notice of Acceptance of Final GEIS

Putnam County - The Town of Putnam Valley Town Board, as lead agency, has accepted a Final Generic Environmental Impact Statement on the proposed Adoption of Comprehensive Plan and the Future Adoption of Zoning and Subdivision Amendments to Implement the Plan Town of Putnam Valley. A copy of the proposed Comprehensive Plan FGEIS may be reviewed at the following locations:

Town Clerk
Town of Putnam Valley Town Hall
265 Oscawana Lake Road
Putnam Valley, New York 10579

Putnam Valley Free Library
30 Oscawana Lake Road
Putnam Valley, New York 10579

FGEIS will be posted at the Town of Putnam Valley website at http://www.putnamvalley.com.

The action involves the adoption of a comprehensive plan, including recommendations for land use regulations to effectuate said plan. The project applies to properties within the Town of Putnam Valley, New York.

Contact: Samuel Davis, Town of Putnam Valley, 265 Oscawana Lake Road, Putnam Valley, NY 10579, Phone: (845) 526-2121.

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