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1 <br /> 1 <br /> 12 <br /> 7 0 SOIL VAPOR EXTRACTION PILOT TESTING <br /> `r <br /> Canonie performed a soil vapor extraction (SVE) pilot test on W-1 , W-2, and W-4 to <br />' determine whether this technology would be a viable remedial alternative for the Site <br /> Canonie used its portable SVE system, which extracts the soil vapor under a vacuum <br />' and treats the air stream with granular activated carbon (GAC) before discharging it <br /> to the atmosphere, for the pilot testing, Prior to performing the pilot test, approval <br />' was received from the San Joaquin Unified Air Pollution Control District <br />' 7 1 Pilot Testing.Procedures <br />' The SVE system components consisted of a Reitschle VFT-180 carbon vane vacuum <br /> pump, a 200-pound GAC vessel, ancillary piping, control panels, and a self-contained <br /> lighting system, all of which were mounted on a portable, single-axle trailer The SVE <br /> system is capable of extracting air at a flow rate of 127 standard cubic feet per <br /> minute (scfm) and maintaining a vacuum of 28 inches of mercury. A portable <br /> generator is used to supply power to the system Various instruments, including air <br /> rflow meters and vacuum and temperature gauges, allowed Canonie personnel to <br /> guarantee safe operation of the SVE system while maintaining a high extraction <br /> rperformance. <br /> IEach extraction well was tested for 30 minutes to determine its performance <br /> characteristics The SVE system was connected to the extraction well using a flexible <br /> vacuum-rated vinyl hose with CAM fittings The vapor flow rates were measured <br /> using a hot wire anemometer and a digital readout with an electromechanical totalizer <br /> I The vapor concentrations in the influent and effluent air streams were quantified using <br /> a PID equipped with a probe to detect VOCs The air quality in the exhaust stack was <br /> monitored closely for breakthrough of the GAC vessels <br /> IPL\W 191 6341REP0RTSI9TE ASSWIANTECAWIANTECA RPT !Aw 26 231 C,anonteE 1 V 11 on 1 e tal <br />