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Notice for Public Comment

3M Woodbury Disposal Site Cleanup Plan

The MPCA invites the public to comment on a proposed cleanup plan for contamination related to perfluorochemicals at the 3M Woodbury Disposal Site, in Woodbury, Minn. The public comment period begins July 23, 2008 and closes August 22, 2008. A public meeting will be held in Woodbury on July 24 (see below for details).

The 3M Woodbury Disposal Site is located on the border of Cottage Grove and Woodbury, between Woodbury and Cottage Grove Drives and south of Dale Drive. It consists of several old dump sites at which the St. Paul-based 3M Company legally disposed of manufacturing wastes during the 1960s. Disposal methods included burial and open burning.

The site has been previously investigated and cleaned up due to soil and ground-water contamination from volatile organic compounds (VOCs, typically solvents). A ground-water pump-out system was installed at the site in 1973 to capture and control migration of VOCs in ground water, which continues to operate today. Other site investigations and cleanup actions also addressed VOCs. Since 2005, 3M has been working with the MPCA to assess the presence and extent of perfluorinated chemicals (PFCs) in soils and ground water at and near the site.

After analyzing various options for long-term remedies for PFC contamination at the site, 3M completed a Feasibility Study and submitted it to the MPCA in February 2008 (addendum submitted July 14). The MPCA evaluated these studies and has selected its preferred remedy, which is now available for public comment.

The MPCA recommends implementing the following remedies at the Woodbury site:

1. Institutional controls, access restriction, and ground-water monitoring

2. Continue existing ground-water recovery system, with carbon filtration treatment to remove PFCs before discharge

3. Excavate PFC-containing soils from several areas of the site, with disposal at permitted off-site disposal facilities.

The Feasibility Study analyzing these and other possible cleanup remedies for the site is available at the MPCA's St. Paul office, 520 Lafayette Road, St. Paul, MN 55155, or on the agency's Web site at

Comments regarding the proposed remedy must be in writing and must be received at the MPCA by close of business on August 22, 2008. The MPCA will also present the proposed remedy at a public informational meeting at 7:00 p.m. on July 24th, 2008, at the Woodbury City Hall, 8301 Valley Creek Road. MPCA staff will be available for questions in an informal open house format a half-hour prior to the meeting.

After close of the comment period, the MPCA will review all comments and approve, modify, or reject the proposed remedy, which will be outlined in a final decision document signed by the MPCA Commissioner. Comments should be directed to:

Gerald Stahnke

Minnesota Pollution Control Agency

Remediation Division

520 Lafayette Road North

St. Paul, MN 55155-4194

For further information contact Ralph Pribble at the MPCA, 651-296-7792 or

(Published in the Woodbury Bulletin on Wednesday, July 23, 2008.)