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Vapor Extraction Test Report <br /> Former Thrifty Oil Service Station # 172 <br /> September 14, 1995 <br /> • The amount of vacuum that could be applied to the test wells during vapor extraction testing <br /> was limited by the muumurn oxygen requirement of the internal combustion engine used for <br /> the test and the low oxygen content of the soil vapor extracted from the vadose zone. <br /> Accordingly, larger effective radii-of-influence and a higher flow rates are most likely <br /> achievable usingSVE <br /> equipment that is not limited by the low oxygen content in the vadose <br /> zone (i.e , blower/catalytic oxidizer or blower/carbon treatment combinations). <br /> • The observed flow rates, estimated ERI values, and calculated mass recovery rates for the <br /> three tests indicate that vapor extraction may be a feasible remediation option for the <br /> nutigatlon of hydrocarbon-affected soil in the vadose zone beneath this site <br /> 3 LIMITATIONS <br /> The vapor extraction test activities and anWyses presented in this report have been conducted in accordance with <br /> current practice and the standard of care exercised by geologists,hydrogeoloS;ts.and engineers performing sumIar <br /> tasks in this area. The findings and conclusions arc based solely upon an aaalyais of the observed conditions. If <br /> actual conditions differ from those described in this <br /> report, our office should be notified. <br /> 6 <br />