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Background

In the middle of the 20th century, it was typical and acceptable for manufacturing wastes to be dumped into pits, landfills, and rivers. These polluting wastes were generated at mills, processing plants, industrial manufacturing sites, as well as at military installations. One of these military installations was the Tinker Air Force Base.

In 1941, Tinker was established as a supply and maintenance depot on the outskirts of Oklahoma City. During World War 2, the base repaired B-24 and B-17 bombers, and today Tinker hosts the largest depot repair complex in the Air Force Material Command. From 1942-1979 manufacturing waste from the Air Force base was dumped into the industrial pits 1 and 2. In 1987, after identifying groundwater and surface contamination, Tinker was added to the list of Superfund sites. The contaminants of concern, 1,2-DCA and TCE, were located in a water bearing zone about 35-45 feet bgs within a complex lithology containing fine silty sand and sandstone. Near the source area, 1,2-DCA concentrations were as high as 500 mg/L and were approximately 10 mg/L in downgradient locations. Water was initially aerobic (ORP =+ 200 mV) and pH neutral with little natural attenuation.

Combined Remedy Effectively Treats 1,2-DCA
and TCE at Tinker Air Force Base