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PILOT - SOURCE TEST PROCEDURES <br /> Once the vapor extraction system has been manufactured a two week <br /> test will begin. Notification will be sent to San Joaquin County <br /> Air Quality (no permit is needed for pilot tests into charcoal) . <br /> PID screening of the exhaust from the charcoal tub scrubs will <br /> occur daily, the test will continue for two weeks or until <br /> breakthrough occurs at which time the test will be terminated. At <br /> the start up of the test, influent samples will be obtained from <br /> vapor wells P1, P3 and EX, and an influent and effluent samples <br /> from the activated charcoal. The vapor well samples will be <br /> analyzed for Total Volatile Hydrocarbons, Benzene, Toluene, <br /> Ethylbenzene, and Xylenes using Western Geo-Engineers Portable <br /> Laboratory. The influent and effluent samples obtained from the <br /> charcoal canisters will be preserved, chain of custody delivered <br /> to Chemtech Laboratories for analysis of Total Fuel Hydrocarbons <br /> and Benzene, using EPA methods 5030 and X502 respectively. Once <br /> breakthrough is indicated by PIP readings, influent and effluent <br /> samples will be obtained from the charcoal canisters and taken to <br /> Chemtech Laboratories. Through out the test, vacuum, temperature <br /> and vapor readings will be obtained from the vapor extraction <br /> wells and vacuum readings from the six onsite ground water <br /> monitoring wells. <br /> Vapor readings will be obtained from a modified Gastech LEL <br /> detector that is capable of detecting volatile organic vapors down <br /> to 200 parts per million. The vacuum and pressure readings will <br /> be obtained from a monometer as inches of water. <br /> This Pilot test will help evaluate the amount of fuel range <br /> hydrocarbons available and the economics concerning vapor <br /> extraction for soil and ground water remediation at this site. <br /> If you have any questions, please call (916) 662-4541. <br /> LIMITATIONS <br /> This report is based upon the following: <br /> A. The observations of field personnel. <br /> B. The results of laboratory analyses performed by a state <br /> certified laboratory. <br /> C. Our understanding of the regulations of the State of <br />