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• Flow rate at the extraction well and at the monitoring wells will be measured once the vacuum has stabilized <br /> using a thermal anemometer or equivalent <br /> Bag samples of extracted soil vapor will be collected and analyzed for the presence of hydrocarbons at a California <br /> DHS-certified lab if required, extracted soil vapor will be treated with an internal combustion engine before being <br /> discharged to the atmosphere The engine will be rented from a company that has specially modified the engine to <br /> treat extracted soil vapor Permits for the treated air discharge will be obtained by the supplier of the engine <br /> Combined Air Sparging/Vapor Extraction Pilot Test <br /> Air injection and vacuum extraction will be operated simultaneously for the combined test The measurements to <br /> be taken at the beginning, during and after the combined test are the same as those for the individual tests and will <br /> use the same instruments The gauges used on the surrounding wells will be able to be easily switched over to read <br /> vacuum or pressure The air spargmg infection rate will not exceed 113 of the soil vapor extraction rate Upon <br /> startup,the SVE system will be allowed to operate long enough so that soil vapor pressure in the surrounding wells <br /> and vapor points has been allowed to stabilize <br /> • <br /> CLEARWATER GROUP <br /> 2 REVISED June 29,2001 <br />