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BIaeS Environmental Management Inc U-Haul#709-50 <br /> 002-70950-03 Work Plan <br /> 11/8/01 <br /> • 4 0 PLANNED REMEDIAL FEASIBILITY TESTING <br /> The following scope of work describes procedures for the following installation of a vapor extraction <br /> (VE) well and air sparge (AS) well, VE feasibility pilot test, AS feasibility pilot test, a Level I Bio-assay <br /> for bio-feasibility, a aquifer pump test, and preparation of a corrective action plan The scope of work will <br /> determine if VE/AS, pump and treat, and/or bio-remediation are technically feasible and cost effective <br /> remedial approaches for soil and groundwater abatement <br /> 41 COORDINATION <br /> Blaes Environmental intends to install one VE well and one AS well in order to conduct the in-situ VE <br /> and AS feasibility pilot testing The site specific Health and Safety Plan (HASP) prepared for the <br /> monitoring well installation activities will be updated to include remedial testing and will be on site <br /> during all field activities The coordination of well installation activities will follow those used for the <br /> installation of the monitor wells (sections 3 1 1, 3 12, and 3 1 3) Other coordination activities will <br /> include scheduling the particular tests, transporting the necessary test equipment, and managing the waste <br /> material Waste material generated during the tests will include, but not be limited to, drill cuttings, spent <br /> carbon, and wastewater <br /> 4 2 VE AND AS WELL INSTALLATION AND BIO-FEASIBILITY SOIL SAMPLING <br /> Proposed VE and AS wells will be drilled and installed prior to VE and AS feasibility pilot tests <br /> Previously collected geologic and analytical data will be utilized In the selection of individual well depths <br /> and screened intervals During the drilling program, soil samples will be collected from soil horizons <br /> exhibiting the highest concentrations of petroleum hydrocarbons Up to three soil samples will be <br /> collected from the VE well borehole and submitted for Level I bioassay feasibility analysis <br /> 42 1 VE Test Well Construction <br /> One VE test is planned for installation prior to VE testing The purpose of the VE well is to provide a <br /> reasonable representation for the capacity of extracting vapor from the subsurface soil Although some of <br /> the wells at the site can be utilized as vapor extraction wells in the future, the screened interval of the <br /> existing wells is limited and the location of these wells are not ideal for conducting the test The <br /> proposed location of the test well is near former bore hole DP-2, which was identified as a source area for <br /> hydrocarbons in soil (Figure 13) <br /> 14 <br />