Abstract |
The MGM Brakes site consists of a five-acre plot containing an automotive brakes casting plant, a paved area surrounding the plant, and an open field. It is located in the community of Cloverdale, California, in Alexander Valley, approximately 80 miles north of San Francisco. From 1965 until 1972, hydraulic fluid containing PCBs was discharged onto site property. Wastewater containing ethylene glycol was disposed onsite between 1972 and 1981. The ethylene glycol acted as a co-solvent with water, facilitating the transport of PCBs in soil. Approximately 13,510 cu yds of soil within a 3-acre area have been contaminated with PCBs at concentrations up to 4500 ppm. The primary contaminants of concern affecting soil, sediments, surface water, and air are PCBs. The selected remedial action for the site includes: dismantling of the MGM Brakes process building; crushing of concrete slab, and excavation of soil. The estimated capital cost for the remedial action is $5,369,300 with no annual O&M costs. |