Vapor Intrusion Testing Around Saint Louis Park Superfund Site

U.S. Environmental Protection Agency, Minnesota Pollution Control Agency, Minnesota Department of Health and the city of St. Louis Park have scheduled two open houses Thursday, March 3, to answer questions about upcoming vapor intrusion testing near the Reilly Tar & Chemical Superfund site. The open houses will be held from 2-4 pm and 6-8 pm at the St. Louis Park Public Library.

In late March or early April, EPA will offer free air sampling air in about 30 homes and apartment buildings in an area bounded by 32nd Street West to the north, Highway 7 to the south, Louisiana Avenue to the east and Pennsylvania Avenue to the west. The area is part of the Reilly Tar & Chemical Corp. Superfund site, which was sold to St. Louis Park and converted to residential and recreational uses in 1972.

Air samples will be analyzed for the presence of polycyclic aromatic hydrocarbons (PAH), which have been detected in the groundwater and soil under the site. Air sampling will involve "sub-slab" sampling under basements and slabs to test for gases that may be collecting beneath building foundations. The vapor intrusion testing is part of a required post-cleanup review of the site by EPA and MPCA.

In 2008, EPA and state and local agencies investigated an unrelated vapor intrusion site in St. Louis Park involving about 250 properties in a neighborhood to the east of the current testing area.

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