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I 1 12 ' 7 0 SOIL. VAPOR EXTRACTION PILOT TESTING .r Canonre performed a soil vapor extraction (SVE) pilot test on W-1 , W-2, and W-4 to ' determine whether this technology would be a viable remedial alternative for the Site Canonre used its portable SVE system, which extracts the soil vapor under a vacuum ' and treats the air stream with granular activated carbon (GAC) before discharging it to the atmosphere, for the pilot testing, Prior to performing the pilot test, approval ' was received from the San Joaquin Unified Air Pollution Control District ' 7 1 Pilot Testing Procedures The SVE system components consisted of a Reitschle VFT-180 carbon vane vacuum pump, a 200-pound GAC vessel, ancillary piping, control panels, and a self-contained lighting system, all of which were mounted on a portable, single-axle trailer The SVE system is capable of extracting air at a flow rate of 127 standard cubic feet per minute (scfm) and maintaining a vacuum of 28 inches of mercury A portable generator is used to supply power to the system Various instruments, including air flow meters and vacuum and temperature gauges, allowed Canonre personnel to guarantee safe operation of the SVE system while maintaining a high extraction performance Each extraction well was tested for 30 minutes to determine its performance characteristics The SVE system was connected to the extraction well using a flexible Ivacuum-rated vinyl hose with CAM fittings The vapor flow rates were measured using a hot wire anemometer and a digital readout with an electromechanical totalizer The vapor concentrations in the influent and effluent air streams were quantified using I a PID equipped with a probe to detect VOCs The air quality in the exhaust stack was monitored closely for breakthrough of the GAC vessels I .L%W 161 6341REP0F1M ITE ASSIMANTECAWANTECA RPT IAW 26 931 CanonieEnvlronmental