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Vapor Extraction Pilot Test for <br /> 4445 Pershing Avenue Stockton California <br /> 2 Four (4) Car Sound 3-way/2-way catalytic converters <br /> 3 Computerized Stoichiometric Fuel Regulators, manufactured by VR <br /> The equipment is trader-mounted and has approximate maximum dimensions of <br /> 187 inches (length), 76 inches (width), and 65 inches (height) This system has been <br /> permitted by the South Coast Air Quality Management District for multiple saes for use <br /> in vapor extraction Attachment IV contains the manufacturer's supporting documentation <br /> on emissions control and the unit's construction The unit will be connected to existing <br /> piping connected to two existing vapor extraction wells located in the area where old <br /> underground storage tanks were removed during a station upgrade Concentrations of <br /> hydrocarbon content (HC) in the air stream from the extraction wells to the <br /> extraction/treatment unit will be measured upon start-up of the pilot test Concentration <br /> of HC in the soils in the vicinity of the extraction wells are indicated in the attached sod <br /> sample analytical results (Attachment 1) <br /> MONITORING UNIT <br /> Aegis proposes the following monitoring and reporting program during the pilot test, per <br /> the SJCUAPCD permit requirements A record of hours of operation and maintenance <br /> on site will be maintained <br /> 1 Monitoring of the HC of the inflow to and exhaust from the internal <br /> combustion engine vapor treatment and extraction unit will consist of three <br /> (3) test periods of approximately fifteen (15) minutes each per day, <br /> performed two (2) days per week for the first month of operation, and one <br /> day per month thereafter A Foxboro organic vapor analyzer will be used <br /> for measurement of the HC Written reports, including the measured HC <br /> concentration, will be submitted to the SJVUAPCD and the San Joaquin <br /> County Public Health Services Department/ Environmental Health Division <br /> (SJCPHSD/EHD) on a weekly basis the first month, and once a month <br /> thereafter <br /> 2 Air samples will be collected in Tedlar bags within 10 minutes of initial start- <br /> up of unit and upon completion of pilot test (which will consist of the unit <br /> shut-down and re-start for a spike sample) The air samples will be sent to <br /> a state-certified laboratory, under chain-of-custody, for analyses of lout <br /> petroleum hydrocarbons, as gasoline, and benzene, toluene, ethylbenzene, <br /> and total xylenes <br /> 90 020M LTR -2 <br />