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10 June 2008 <br /> AGE-NC Project No. 97-0312 <br /> Page 8-of 11 <br /> inspection will be scheduled with EHD personnel.Proposed well construction diagrams are depicted <br /> in Figures 5 and 6. " <br /> Following completion ofthe SVE wells,well elevation and global positioning system(GPS)location <br /> will be surveyed by,a California-licensed surveyor relative to a,City of Stockton elevation <br /> benchmark. Well elevation will be surveyed in a format acceptable for the State GeoTracker <br /> database. <br /> 3.3. SVE SYSTEM DESIGN AND.IMPLEMENTATION <br /> A portable high vacuum, oil-ring blower equipped, SVE system with 240Volt, 3-phase generator, <br /> electrical heated catalytic oxidizer(specifications to follow in report)will be placed at the site for <br /> one event consisting of an 8-hour operational period.The blower system will be attached to proposed <br /> shallow SVE well VW-1 which will be used as extraction wells and vacuum,readings will be <br /> obtained from proposed SVE observation wells VW-2 and VW-3 and potentially surrounding ground . <br /> water monitoring wells MW-3 through MW-5 and MW-8 (Figure 2). The test will included a <br /> constant-flow rate, at the maximum.vacuum allowable from the SVE.system. Results from these <br /> tests will be used to establish the effective radius of influence and to determine the optimum <br /> operating level of the extraction system. <br /> 3.4 SVE PILOT TESTING <br /> During the shallow SVE Test,the inlet ofthe system will be connected to the proposed shallow SVE <br /> well VW-1 to evaluate the contaminant concentrations and SVE influence on the shallow sediments.. <br /> Air-tight well caps fitted with.attached Magnehelic vacuum gauges will be attached to the remaining <br /> proposed SVE wells.and potential monitoring wells and the induced vacuum will be measured at <br /> these monitoring points. <br /> The air stream from the SVE well will be monitored for the presence of organic vaporusing an OVM <br /> equipped with a PID and flame ionization detector(FID).The vacuum applied to the extraction wells <br /> will cause hydrocarbons in the soil to volatilize and flow through the vacuum pump to the SVE unit.. <br /> The extracted hydrocarbon vapor will be destroyed in a catalytic cell as part of a combustion process. <br /> 3.4.1. Field Measurements <br /> During the SVE Tests, air flow will be monitored using a Dwyer DS-200 flow sensor.-Flow rates <br /> will initially be measured and recorded in inches of water of differential pressure.The flow rate will <br /> Advanced GeoEnvironmental,Inc. <br />