| Abstract |
The 50-acre South Andover site is composed of several privately owned parcels of land near Minneapolis in Anoka County, Minnesota. Land use in the area is predominately commercial and residential, and several auto salvage and repair yards are located at, or adjacent to, the site. The site contains part of a wetlands area with several small recreational lakes in the vicinity. The site overlies three aquifers, one of which supplies the surrounding community with drinking water. Between 1954 and 1981, multiple waste storage and disposal activities occurred on several properties within the site boundaries. The selected remedial action for this site includes excavating and onsite treatment of 2,100 cubic yards of PAH-contaminated soil using ex situ biological treatment; excavating and disposing of the remaining 9,300 cubic yards of PAH, PCB, and metal-contaminated soil from areas 2, 3, 4, and 7 in an offsite solid waste landfill; sampling and removing offsite approximately 20 onsite drums; and monitoring surface water and sediment. The estimated present worth cost for this remedial action is $2,470,000, which includes an O&M cost of $195,000. |
