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rReport—Remedial Action Feasibility Page 4 <br /> Cutter Lumber—Western Lift Site <br />' GPE Project No 102 3 <br /> . August 1,2003 <br />' 1.2.2 Scope of Work <br /> The work documented in this report encompasses the following principal elements <br />' • A water well (receptor) survey to identify all groundwater production wells located <br /> within 2,000 feet of the point of release <br />' • Using mass balance principals to estimate the residual gasoline mass in the <br /> subsurface <br /> • Construct a pilot vapor extraction system / air sparge system (VES/AS) One new <br /> vapor extraction and one new air sparge well were drilled and constructed <br /> • Operate the pilot vapor extraction / air sparge system This test entailed 7 days of <br /> VES and AS operation Air was infected into the new sparge well with a compressor, <br />' and gasoline-laden vapors were extracted from the VE well with a blower / ring <br /> compressor For the last two days of the test period, the vapor extraction operation <br /> was modified to draw from a previously existing groundwater monitoring well (MW- <br /> 7) Air samples were collected and the efficiency of the VES and VES/AS systems <br /> was evaluated <br /> Based on the results of the pilot test as well as past work performed at the site as well <br /> ras the adjacent Manna Pro site, a Feasibility Study evaluated the effectiveness of at <br /> four possible remedial methods described above <br /> 1� <br /> r <br /> r <br /> r <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> s <br /> r2937 Veneman Ave ,#13240 Geo-Phase Environmental Inc Phone(209) 569-0293 <br /> Modesto, CA 95356 Fax(209)569-0295 <br /> r <br />