Site 21 at Tinker Air Force Base, Oklahoma was selected as a demonstration site for the Total Petroleum Hydrocarbon Working Group approach for establishing Risk Based Screening Levels. The site had been previously characterized using conventional analyses and was recommended for natural attenuation. Contaminants included JP-4 and diesel fuels. Groundwater and soil samples were collected and analyzed using the Direct Method, specified by the Working Group. A Tier I risk ...
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