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The Ten-Mile Drain Site is located northeast of the City of Detroit and on the western shores of Lake St. Clair in St. Clair Shores, Macomb County, Michigan. The site includes a portion of the Ten Mile drain (TMD), a concrete storm sewer system fifteen feet below ground, and the nearby Lange and Revere Street canals which connect to Lake St. Clair. Polychlorinated biphenyls (PCBs) are known to have migrated from a historical release of PCB-containing oil into the storm sewer system, either from a surface spill or illegal dumping, through the TMD system and then discharged into the canals. The area of concern for this site includes TMD sewer lines in and around the intersection of Bon Brea Street and Harper Avenue in St Clair Shores, Michigan, the Lange and Revere Street canals, and possibly other areas to be determined after further investigation and sampling.

In July 2001, sediment samples were collected in Lange and Revere canals by the Macolm County Public Works Office (MCPW). Elevated levels of PCBs prompted the MCPW to notify the Michigan Department of Environmental Quality (MDEQ). Since that time, MDEQ, MCPW, the City of St. Clair Shores, the Macomb County Health Department, and U.S. EPA have conducted investigations and cleanups of site-related contamination in TMD and the canals. In September 2010, the Ten-Mile Drain site was placed on the National Priorities List (NPL), a roster of the nation’s hazardous waste sites eligible for investigation and cleanup under EPA’s Superfund program.

In September 2011, EPA selected an interim action to address high concentrations of PCB oil and contaminated sediment that continued to accumulate behind weirs and sediment traps placed in an effort to prevent PCB contamination from reaching the canals. Actions include the placement of absorbent snares to soak up the oil, periodic removal and proper disposal of the snares and sediment (if needed), and monitoring for PCBs.  Monthly reports on the monitoring results and sampling can be found in the “Technical Documents” section of this website.

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