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' The test will be conducted at 2, 5 and 10 acfm During each step, the following Parameters will be <br />' measured <br /> • The groundwater level will be measured to the nearest 0 01 foot with a Solmse electronic interface <br /> probe, or equivalent in the observation wells <br /> • The down hole groundwater DO concentration in the observation wells <br /> • Applied well head pressure using an appropriate pressure gauge, and flow rate using a thermal <br />' anemometer, or pitot tube and Magnehclfcs gauges <br /> The following vapor extraction measurements will be made during each step of the air sparge test <br /> • The vacuum applied to the well will be measured with a vacuum gauge The applied vacuum will be <br />' controlled and adjusted with dilution valve <br /> • The concentration of hydrocarbon volatiles and oxygen in the soil-gas extracted from the well will <br />' be monitored during the test using a flame ionization detector (FID) or a photo ionization detector <br /> (PID), and Gastech'�'meter <br /> • The soil-gas extraction flow rate at the extraction well will be controlled during the test using a <br />' thermal anemometer, or pitot tube and Magnehelic®gauges <br /> A soil-gas sample will be collected during the maximum infection flow rate during the air sparge pilot test in <br />' a Tedlar"m bag for laboratory analysis The sample will be analyzed for volatile fuel hydrocarbons (VFH) <br /> using Modified EPA Method 8015B and for BTEX using EPA Method 8021B at a California DHS-certified <br /> lab The extracted soil-gas will be treated with an internal combustion engine, or thermal oxidizer The <br /> appropriate air quality control permit will be procured for the internal combustion engine, or thermal <br /> oxidizer <br /> 1 <br /> 1 <br /> 1 <br /> t <br /> I <br />