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• <br /> CAMBRIA <br /> The following sections detail the tasks and information for the proposed interim remediation: <br /> Site Safety plan: Cambria will prepare a comprehensive site safety plan to <br /> The plan will be reviewed and signed by each site worker and kept onsite during <br /> site workers. <br /> uring field activities. <br /> Notifcation: Cambria provided the required notification to the <br /> Control District(APCD). San Joaquin County Air pollution <br /> Test Equipment: Critical components for DPE/SVE include an extraction device, water storage, <br /> © n ctric device, requiring the and a vapor treatment device. A Solleco catalytic oxidizer(ECat) will be used to apply a vacuum <br /> to the extraction well and to abate extracted vapors. The ECat is aele <br /> use of a generator for powering. The ECat is equipped with a liquid-separator to remove <br /> entrained groundwater from the vapor stream. Groundwater will be pumped from the separator <br /> into an onsite storage tank. <br /> The ECat is equipped with controls to manage well flow, dilution air flow, pump vacuum, and <br /> well vacuum data. A Thomas Industries model 907CDC18F vacuum pump will be used to <br /> collect the vapor samples. A Horiba organic vapor analyzer will be used to field measure <br /> hydrocarbon concentrations in the extracted vapor stream. Magnehelic differential pressure <br /> gauges will be used to measure induced vacuum in adjacent wells. A water level meter will be <br /> used to measure groundwater drawdown in adjacent wells. A Kent 0700 flow totalizing meter <br /> will continuously measure extracted groundwater. <br /> The ECat will abate the extracted soil vapors to comply with the APCD requirements. The <br /> extracted groundwater will be temporarily stored in an onsite storage tank and subsequently <br /> transported to Shell's Martinez Refinery located in Martinez,California for recycling. <br /> Test Data Collection: Cambria will periodically measure/record the following DPE/SVE <br /> OPmdonal and monitoring information: applied vacuum, induced vacuum, well flow, dilution air <br /> flow, vapor concentrations, extracted groundwater volume, and groundwater drawdown. This <br /> information will be initially collected every 15 to 30 minutes, then in longer intervals after <br /> operational data has stabilized. Vapor samples will be collected periodically in one-liter Tedlar <br /> bags to confirm field measured concentrations through laboratory analysis. A State-approved <br /> analytical laboratory (STL-San Francisco of Pleasanton, California) will analyze all samples for <br /> total petroleum hydrocarbons as gasoline, benzene, toluene, ethylbenzene, xylenes, and methyl <br /> tertiary butyl ether using EPA Method 8260. <br /> 0854 3 <br />