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F 3 <br /> c <br /> C A M B R I A <br /> thick bentonite seal and cement grout to grade. The wells will be secured with a locking cap <br /> under a 12-inch diameter traffic-rated well box. <br /> SVE Pilot Test: The objective of the SVE pilot test will be to evaluate the feasibility of SVE for <br /> source area remediation of petroleum hydrocarbons and MTBE. Initially, Cambria will perform <br /> short-term SVE tests on the wells. Each test will consist of a minimum of three steps (varied <br /> operating parameters) to determine the optimal extraction rate. The-optimal-extraction3rate is <br /> defined as the vacuum that produces the maximum sustained flow rate. After the short-term <br /> testing, Cambria will conduct long-term SVE testing of these wells at the optimal extraction rate. <br /> The testing duration will be dictated by San Joaquin Valley Air Pollution Control District <br /> regulations. <br /> The test will be performed with a pneumatic positive displacement blower with carbon filtration <br /> or an internal combustion engine. Cambria will measure the vapor extraction airflow rate, the <br /> applied vacuum at the wellhead, vapor stream and the vacuum influence in nearby wells <br /> periodically during the long-term test. Tempera itfe will be measured at the wells to determine if <br /> s'�tiort circuiting is taking place. <br /> A Horiba hexa J-series hydrocarbon analyzer, calibrated to iso-butlylene, will be used to field <br /> measure hydrocarbon concentrations in the extracted vapor stream. A TSI model 8330 air <br /> velocity meter will be used to measure vapor extraction velocity rates and temperature. A <br /> Thomas Industries vacuum pump will be used to collect the vapor samples. Vapor samples will <br /> be collected in one-liter Tedlar bags for laboratory analysis. Magnehelic differential pressure <br /> gauges will be used to measure the vacuum applied at the wellhead and induced in nearby wells. <br /> i <br /> The scope of work described in this work plan will be performed under the supervision of a <br /> registered geologist or professional engineer. <br /> Chemical Analyses: Selected vapor samples will be analyzed for total petroleum hydrocarbons <br /> as gasoline by EPA Method 8015 (Modified) or equivalent, benzene, toluene, ethylbenzene, and <br /> xylenes by EPA Method 8020 or equivalent, and MTBE by EPA Method 8260. <br /> Report Preparation: Following the receipt of analytical results from the laboratory, Cambria <br /> will prepare a written report which will include field procedures, laboratory results, SVE test <br /> i <br /> findings,boring logs, conclusions, and recommendations. <br /> 1346 3 <br />