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1 <br />' 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 Cali torn ia <br /> DHS-certified lab If required,extracted soil vapor will be treated with an internal combustion engine betore being <br /> discharged to the atmosphere The engine will be rented from a company that has specially modified the en-me to <br />' treat extracted soil vapor Permits for the treated air discharge will be obtained by the supplier of the engine <br /> Combined Air SpargingNapor Extraction Pilot Test <br />' Air infection 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 Nvill <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 1/3 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 /> I <br /> I� <br /> I <br /> I <br /> I <br /> i <br /> I <br /> CLEARWATER GROUP 2 REVISED 1%ta� 8 2002 <br />