HEUVELTON The state Department of Environmental Conservation will hold a public hearing at 7 p.m. March 6 to discuss a proposed remediation of the 5.4-acre former Collins property, 7610 Route 68, town of Oswegatchie.
The proposed cleanup, according to the DEC fact sheet on the project, includes:
■ A remedial design program for the construction, operation, maintenance and monitoring of the remedial program.
■ On-site petroleum-impacted soil excavation and staging, followed by mechanical aeration to promote bioremediation. An estimated 16,300 cubic yards of petroleum-impacted soils will require treatment. The mechanical soil turning will continue until there is no visual, odor or photo-ionization detector readings.
■ Site-redevelopment cover.
■ An environmental easement to restrict future use and use of groundwater, which will have to comply with DECs plan and require an evaluation of the potential for soil vapor intrusion for any buildings developed on the site, including provision for implementing actions recommended to address exposures related to soil vapor intrusion.
DEC on Friday began a 45-day public comment period on the remediation plan. It will end March 25.
An investigation of the site, according to DEC, revealed the presence of volatile organic compounds, semi-volatile organic compounds and metals. Soil and groundwater contamination exists above standards as the result of spills of petroleum at the facility.
The majority of subsurface soil contamination, DEC said, is present in a smear zone from 4 to 8 feet below grade beneath both the site and the adjacent property to the southwest.
The former Collins property is northwest of Route 68 and southeast of the St. Lawrence River.
The city of Ogdensburgs drinking water intake and the former Diamond International site are to the west.
The Collins-Hammond Electrical Contractors property is immediately adjacent the southeast corner of the site and was part of the original major oil storage facility site.
The site was once used as a petroleum bulk storage facility and was owned by several petroleum companies since the late 1930s, including Atlantic Fuels, Ultramar Petroleum Inc., Augsbury Corp., Gulf Oil Corp., and Esso Standard Oil Co.
Gasoline, fuel oil and kerosene were stored in tanks ranging in size from 353,000 to 3.3 million gallons during its operation.
These above-ground storage tanks were removed in the 1980s.