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DEC: Speonk Superfund cleanup finished

The Superfund cleanup of a former lumber site in Speonk has been completed, according to the state Department of Environmental Conservation.

The 5-acre site, where work began in September 2010 and was completed in October 2011, was owned by Best Building & Supply Treated Lumber Corp. At 1348 Speonk-Riverhead Rd., it was also close to the environmentally protected Central Pine Barrens Preserve, according to a news release from the DEC.

Products used to treat of lumber, including copper chromate-arsenate and zinc oxide, resulted in waste released into surrounding areas, including groundwater and soils in the pine barrens, according to the DEC.

Excavation of about 3,000 tons of contaminated soil was followed by placing clean backfill at the site. On the west side of Speonk-Riverhead Road, 10,000 tons of contaminated soil were removed and backfilled, the news release said. Both areas were covered with topsoil and seeded.

The nonhazardous waste is being shipped to the Brookhaven landfill; the hazardous fill, to the Chemical Waste Management facility in Model City, a town in upstate Niagara County, according to information provided by the DEC in March when the work was ongoing.

The cleanup has left the site “unrestricted,” which means there are no restrictions on public use.

Because trace amounts of chemicals remain, the DEC will monitor the site.

A state Superfund site is identified by whether it can pose a significant threat to public health and the environment.

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