Thursday, December 17, 2009

DEC Proposes Ozone Park Superfund Site Remedy

By Patricia Adams

The New York State Department of Environmental Conservation (NYSDEC), held a public meeting on December 9th to discuss the proposed remediation for contamination related to the Ozone Industries State Superfund Site. The site consists of eight bays beneath the abandoned elevated Long Island Railroad (LIRR) located across the street from 101-32 101st Street in Ozone Park.

New York’s State Superfund Program (SSF) is responsible for identifying sites suspected of being inactive hazardous waste disposal sites. Sites in the program are categorized as those that pose a significant threat both to public health and the environment. During the course of remediation, a proposed site will go through an investigation, evaluation, cleanup and then monitoring. NYSDEC generally attempts to identify parties responsible for site contamination and require cleanup before committing State funds.

In order to clean the Ozone Park site, the DEC says it will excavate contaminated shallow soils, construct and operate a soil vapor extraction system, and include the construction and operation of a sub-slab depressurization system (see definition below) in the disposal area. Groundwater monitoring is proposed for the contaminated groundwater plume and institutional controls would be imposed in the form of an environmental easement.

The following is an outline of the proposal by NYSDEC for cleaning up the site:

•The floors in Bays 8-15 would be removed and the contaminated shallow soils would be excavated and replaced, as much as practical, with clean backfill.

•A soil vapor extraction (SVE) system of vertical wells and a piping system would be constructed to collect vapors from the deeper soils.

•An active sub-slab depressurization (SSD) system would be constructed beneath the new floors in Bays 8 through 15 to collect subslab vapors. The sub-slab depressurization system basically consists of a fan or blower which draws air from the soil beneath a building and discharges it to the atmosphere through a series of collection and discharge pipes.

•A vapor intrusion mitigation program would be implemented to investigate and mitigate, if necessary, vapors in off-site adjacent structures.

•Monitoring of the impacted groundwater onsite and off-site would be conducted.

•Institutional controls in the form of an environmental easement would be required.

•A Site Management Plan would be developed.

•The property owner would provide a periodic certification that the institutional controls are in place.

•The operation of the components of the remedy would continue until the remedial objectives have been achieved, or until the NYSDEC determines that continued operation is technically impracticable or not feasible.

Before finalizing the remedy for the site, NYSDEC will consider public comment. The agency will also release a document known as a Record of Decision explaining why the particular remedy was selected. The document will also serve to address public comment. Following the states filing of the Record of Decision, the project will move into the design phase with cleanup action to follow.

Prior to 1998, The Ozone Industries Facility was sold in 1998 and prior to that manufactured aircraft parts including landing gear, hydraulic assemblies, aircraft steering assemblies and flight controls. The company rented several bays beneath the LIRR which were used to store spent trichloroethylene (TCE), hydraulic fluids, and scrap metal chips. It is believed that releases of solvents, oil and/or fluids may have occurred in one or more of these bays.

The Ozone Industries Site is located in a mixed commercial/industrial and residential area within a block bounded by 99th and 100th Streets to the east and west and by 101st and 103rd Avenues to the north and south. The bays on the property are owned by the City of New York and leased to various tenants for different uses.

If you would like to offer public comment you may do so until December 24. Submit your comments to: John Durnin, P. E. NYSDEC, Division of Environmental Remediation, 625 Broadway, Albany, NY 12233-7016

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