Superfund Record of Decision (EPA Region 8): Rocky Mountain Arsenal Off-Post RI/FS Site, Commerce City, Colorado, June 1987. First Remedial Action

摘要

The Rocky Mountain Arsenal (RMA) is a facility owned and operated by the United States Department of the Army. It was established in 1942 with the primary mission of manufacturing and assembling chemical and incendiary munitions to support the war effort. Afterwards, pesticides and herbicides were produced on-post by private leases. Many of these substances, their by-products and residues were later disposed of on-post. The RMA off-post site is located northeast of downtown Denver, Colorado, adjacent to RMA. The area is nearly completely developed with residential subdivisions, industrial facilities and gravel operations. South Adams County Water and Sanitation District (SACWSD) was created in 1953 to supply approximately 30,000 customers with well water from the alluvium and bedrock. Recent studies by EPA and SACWSD indicate that significant concentrations of organic solvents are present in the local and Regional ground water system which is the main source of drinking water for SACWSD. The operable unit addresses treatment or replacement of contaminated ground water within the RMA off-post site prior to its use as drinking water by customers of the SACWSD.