GRAY — Pollution at the McKin Superfund site has spread to areas previously thought to be unaffected by the former waste oil transfer center, the Environmental Protection Agency said.
Analysts also have discovered that pollutant levels in the Royal River, about 4,000 feet from the McKin site, have declined since 1993. However, the level of the contaminant in the river still exceeds government water quality standards.
The McKin site covers about seven acres in southwest Gray. The McKin facility, a collection and transfer station for waste oil and industrial wastes, was constructed in 1972 on property previously used as a sand and gravel pit. From 1972 to 1977, the facility handled 100,000 to 200,000 gallons of waste annually.
The contamination was discovered near Collyer Brook by engineers looking for possible areas to expand the Gray public water system. Ground-water testing showed concentrations of trichloroethylene, the principal pollutant at the McKin site, to be slightly above state and federal standards.
The contaminated water near the McKin Superfund site is not being used for drinking and does not pose an immediate threat to public safety, the EPA said.
A long-term settlement on the future of the site should not be affected by the discovery of new contamination.