| Abstract |
The Sand Creek Industrial site is in Commerce City, Adams County, Colorado. Land use in the vicinity of the site is industrial, including trucking firms, petroleum and chemical production and supply companies, warehouses, small businesses and several residences. The site contains the property and buildings of the Colorado Organic Chemical Company (COC) and approximately 13 residences. Production wells north and downgradient of the study area are the source of water supply to the county. Pesticide manufacturing operations began at COC in the 1960s. Fires in 1968 and 1977 and improper pesticide storage practices resulted in high levels of organophosphate pesticides, chlorinated hydrocarbons, and thermally-altered pesticides being released at the site. In 1978 COC removed some contaminated soil, and in 1984 COC removed drums of waste, excess product, and contaminated soil, and installed fencing at the site in response to an EPA order. The Record of Decision represents the first of five planned operable units for the site and addresses soil, buildings, and tanks contaminated by pesticides, volatile organics, and metals. The primary contaminants of concern affecting the soil, onsite buildings, and tanks are VOCs including TCE and PCE; and other organics including pesticides. |
