Superfund Record of Decision (EPA Region 5): Mason County Landfill, Mason County, Michigan (First Remedial Action) September 1988

摘要

The Mason County Landfill site is located three miles south of the City of Ludington, Mason County, Michigan. The site occupies approximately 18 acres of a predominantly rural area in Pere Marquette Township. Approximately 10 acres of the site were used as a landfill. Less than 500 feet from the landfill there is a wetland area which drains into the headwaters of Iris Creek. There are 14 residential wells within a 0.5 mile radius of the landfill. The population within a 3-mile radius of the site is estimated to be 1,112. Although the Michigan Department of Natural Resources (MDNR) documented that slurry and sludge wastes from local industries were being dumped at the landfill, the site's license was renewed annually until it was closed in August 1978 after reaching capacity. Public concerns over the water quality in Iris Creek prompted the DPW and MDNR to review closure activities. The site is currently owned by Mason County. In 1983, a clay cap was installed over the landfill and berms, and storm drains were constructed to improve site drainage. Two surface aerators were installed in Babbin Pond to facilitate biodegradation of organic matter and 15 gas vents were placed in the top of the landfill. The primary contaminants of concern affecting the ground water are VOCs including benzene, PCE, TCE, and xylene. The selected remedial action for the site is outlined.