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USA65 Pilot Test-Workplan <br /> concentration or flow rates; therefore the sample frequency <br /> should be greater at the beginning of the test or at any change <br /> in the system flow parameters (intentionally changed or <br /> "naturally" changed) . <br /> The system will be monitored using an on-site portable <br /> chromatograph to calculate the concentrations of the vapor stream <br /> and also to determine efficacy and emmision control of the <br /> system. Flow rates will be determined using a one inch orifice <br /> plate . <br /> Confirmation Vapor stream samples will be collected at the start <br /> up of the system and at the end of the test period. Care will be <br /> taken to maintain similar flow, pressure, and vacuum parameters <br /> during the two sample collections . The vapor samples (bag or <br /> canister) will be chain of custody delivered to a California <br /> State Certified Laboratory and each analyzed for TFH, BTEX and <br /> CO2 . <br /> Pounds per day recovered (as gasoline and benzene) will be <br /> calculated using the mg/L vapor stream concentration and the flow <br /> rate reading obtained when the samples are taken. <br /> During the pilot test, the wells on-site will be periodically <br /> checked and the results recorded in order to determine the vacuum <br /> influence of the system. <br /> The vapor concentrations, flow rates and vacuum information will <br /> allow for the calculation of expected recoveries and degradation <br /> rates . The above measurements will also aid in the determination <br /> of the pump or pumps needed and the most effective vapor emission <br /> control system for the site. <br /> The pilot test will be conducted for one day. <br /> EVALUATION <br /> During the evaluation phase, tables and graphs will be made of <br /> the vapor concentrations, vapor production rates, well flow <br /> rates, and vacuum levels as compared to different system <br /> parameters . <br /> The graphs will allow the determination of the most effective <br /> system parameters for cleaning up the site, ie : <br /> Pump type and size . <br /> Effective flow rates. <br /> Expected vapor production. <br /> �. 4 <br />