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首页> 美国政府科技报告 >Comparing Cleanup Costs to Risk for Selected USAF Pump and Treat Systems: Remediating Trichloroethylene Contaminated Aquifers
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Comparing Cleanup Costs to Risk for Selected USAF Pump and Treat Systems: Remediating Trichloroethylene Contaminated Aquifers

机译：将清理成本与选定的美国空军泵送和处理系统的风险进行比较：修复三氯乙烯污染的含水层

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This paper investigates Pump and Treat (P&T) systems operating at U. S. Air Force (USAF) installations having ground water contaminated with Trichloroethylene (TCE). As part of this study, it was found that in 1997 the USAF was operating 86 P&T systems at 49 of its installations. The EPA regulated TCE in drinking water in 1989 at a level of 5 ppb based on the results of annual bioassays. EPA established a health goal of zero and set the enforceable MCL at 5 ppb based on the feasibility of detection at the time. This study is a compilation of information on Air Force installation P&T systems to submit to the EPA's Office of Ground and Drinking Water in support of a review and possible revision of the Drinking Water Standard for TCE to be based on a scientifically sound standard rather than the current policy based standard. Statistical forecasting was performed on 4 P&T sites to determine when operations of the P&T systems could be terminated based on the different cleanup levels of 5, 50, and 100 ppb. The statistical model algorithm was also used to forecast the lifetime excess cancer risk at the sites based on the TCE contaminant level. Cumulative costs and price to capture each gallon of TCE through time was also determined. By just considering the 4 sites the cost savings realized from raising the TCE MCL from 5 to 50 ppb would he approximately $60 million and from 5 to 100 ppb would be approximately $72 million. If the average cost savings from the 4 sites was applied to the 61 TCE sites, an estimated $0.9 billion to $1.1 billion could be saved by raising the TCE MCL to 50 ppb or 100 ppb, respectively.

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