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Blaes Enwonmentat Management 11, U-Haul#709 50 002-70950-03 Work Plan 1118101 4 2 5 Geo-technical Sample Analysis Up to two soli samples from distinct soil horizons including the capillary fringe will be collected for geo- technical analyses The geotechnical analyses will include grain size distribution, hydraulic conductivity, total organic carbon, porosity, moisture content and dry bulk density The data will be used to evaluate feasibility test results and natural attenuation parameters for preparation of the corrective action plan 4 3 REMEDIAL FEASIBILITY TESTING 43 1 Project Coordination/Planning and Management Prior to initiating VE and AS pilot tests, Blaes Environmental will coordinate and plan the field activities Blaes Environmental personnel will meet to coordinate and schedule VE and AS pilot tests, procure off gas treatment and pilot test equipment and schedule appropriate personnel for field activities In addition, the Blaes Environmental project manager will also coordinate field activities with the S]C, U-Haul and vendors including analytical laboratory and carbon vendor I 432 Vapor Extraction Pilot Test Following the installation of the VE well, horizon-specific VE pilot tests will be conducted at the two VE I well casings The purpose of the VE pilot test is to determine the appropriate vacuum versus flow rate curve and the radius of influence for each soil horizon The effects of the testing will be monitored at the VE well and nested wells MW-3a/b, MW-4a/b, and MW-la/b The VE test will be conducted far 6 to 8 hours using a minimum of four vacuum steps at each of the two VE well casings The VE pilot test will I be conducted utilizing a portable, self-contained vacuum blower Evacuated soil vapors will be treated through a vapor-phase granular activated carbon system prior to emission to the atmosphere Nested monitoring point wells MW-3a/b, MW-4a/b, and MW-la/b will be manifolded with vacuum gauges to determine the magnitude of induced vacuum in each soil horizon and to calculate the effective radius of influence values for each soil horizon At the VE well head, a vacuum gauge and an in-line air I flow meter will be manifolded to record induced vacuum and extracted air flow rate I During the test, one vapor sample from each VE well casing will be collected from the influent side of the jcarbon treatment system during the maximum performance of the test (fourth step) These vapor samples will be submitted to a licensed analytical laboratory for analysis of TPH and volatile organic compounds � i 17