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Once the formation has stabilized, pressures will be increased and the next test step <br /> will begin After the final step test, the depth to water, dissolved oxygen content in <br /> the well water, and the oxygen and volatile content of the air above the water in <br /> each observation well will be measured using the same instruments as above <br /> Soil Vapor Extraction Pilot Test <br /> Prior to performing the test, any necessary air permits shall be obtained and the test <br /> will be performed-in accordance with any requirements stated in the permit The <br /> test will be performed by applying a vacuum to an existing vapor monitoring or <br /> extraction well or a soil vapor probe with a vacuum pump to extract soil vapor The <br /> test will be run at different applied vacuums until the vacuum influence in <br /> surrounding wells or points has stabilized, or one pore volume has been extracted <br /> from the soil <br /> The following measurements will be made during the test for the different applied <br /> vacuums <br /> I Vacuum applied to the well will be measured with a vacuum gauge and <br /> adjusted with a bleeder valve on the vacuum side of the pump <br /> i0 Volatiles and oxygen content from the extraction well will be monitored <br /> during the test using a flame ionization detector or a photoionization detector <br /> The vacuum influence in surrounding wells 'will be measured in inches of <br /> water (vacuum) with Magnehelic® gauges, or equivalent <br /> ' I <br /> iFlow rate at the extraction well and at' the monitoring wells will be measnired <br /> once the vacuum has stabilized using a thermal anemometor or equivalent ! <br /> Bag samples of extracted soil vapor will be collected and-analyzed for the presence of <br /> hydrocarbons at a California DHS-certified lab If required, extracted soil vapor will <br /> be treated with an internal combustion engine before being discharged to the <br /> atmosphere The engine will be rented from a company that has specially modified <br /> the engine to treat extracted soil vapor Permits for the treated air discharge will be <br /> obtained,by the supplier of the engine <br /> I ' <br /> � I <br /> I I'I ISI <br /> I 11/9/194 <br /> IIII`� <br /> CLEARWATER GROUP,INC <br /> IEl �li�l„�I �� I EII{�r I �` I �' �I! 'I I• ill illil II f ��I II <br />