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• • 31 August 2001 • AGE-NC Project No 97-0343 IPage 5 of 6 I process Emissions from the engine will be routed through two catalytic converters to maximize the destruction of hydrocarbon vapor 3 2 1 Field Measurements ' During the vapor extraction pilot test, VW-3 will be utilized as the extraction well The extracted air flow will be monitored using a Dwyer DS-200 flow sensor The flow rate will be determined from the measured differential pressure and the piping diameter using a nomograph Flow rates will I be measured and documented in standard cubic feet per minute(scfin),inches of water of differential pressure Induced vacuum measurements will be recorded from wells VW-1, VW-2 and MW-7 utilizing Magnehelic gauges The Induced vacuum will be monitored for a stabilized value, inches of water, during the pilot test Hydrocarbon concentrations in the well effluent stream will be measured at regular Intervals A PID will be utilized for field measurements I3 2 2 Collection and Analysis of Vapor Samples I• A total of four vapor samples will be collected at two-hour Intervals from the Inlet of the extraction well to measure concentrations of extracted hydrocarbon vapor The samples will be collected in ITedlar bags using the organic vapor analyzer as an air pump Following sample collection,the samples will be placed in a covered container and transported under I chain-of-custody to McCampbell Analytical Inc (MAI)in Pacheco,California Each sample will be analyzed within 72 hours for TPH-g, TPH-d, BTEX with methyl tertiary butyl ether(MTBE), and fuel additives in accordance with EPA Methods 8015M, 8020, and 8260, respectively I 3 3 EQUIPMENT DECONTAMINATION IAll sampling tools used for sample collection will be thoroughly rinsed with clean water after being washed with a solution of Alconox All down-hole drilling and sampling equipment will be pressure Iwashed prior to starting the boring I IAdvanced GeoEnvi ron mental,Inc I