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10 September 2004 <br /> AGE-NC Project No 03-1100 <br /> Page 7of10 <br /> 3 2 1 Soil Vapor Extraction Pilot Test <br /> On 27 January 2004, the pilot test was initiated at 11 00 am and continued for approximately <br /> 5 hours An Induced vacuum potential was applied to the casing of vapor well SVE1 The vacuum- <br /> induced pressure was monitored at surrounding observation wells (SVE2 through SVE5 and MW 1 <br /> through MW3)with Magnehehc vacuum gauges fitted to each observation well A sample port was <br /> tapped Into the PVC near the wellhead and a portable organic vapor meter equipped with a PID was <br /> used to measure organic vapor(OV) concentrations The extraction flow rate was measured in-line <br /> with a flow rotometer, directly before the VES The organic vapor concentrations, induced vacuum <br /> potential at the observation points,extracted soil vapor flow rate,and revolutions per minute(RPM) <br /> of the SVE unit were measured at half-hour Intervals and logged on field sheets <br /> On 28 January 2004, the pilot test was initiated at 8 30 am and continued for approximately <br /> 6 5 hours An Induced vacuum potential was applied to the casing of vapor well SVE2 The vacuum- <br /> induced pressure was monitored at surrounding observation wells(SVE1, SVE3 through SVE5 and <br /> MW1 through MW3) with Magnehehc vacuum gauges , e to each observation well The same <br /> testing procedures were followed as that on 27 Janu2003 alytical results from the two pilot <br /> tests are summarized in Table 3 and field data Is repo Table 4 <br /> 3 2 2 Soil Vapor Extraction Pilot Test Sampling and Analysis <br /> A total of three soil vapor samples were collected during each pilot test Soil vapor samples were <br /> collected at two-hour intervals from the sample port of the extraction well to measure hydrocarbon <br /> concentrations in the extracted gas The samples were collected in Tedlar bags using an air pump <br /> Samples were transported in a chilled container under chain of custody to McCampbell Analytical, <br /> Inc (MAI),a California Department ofHealth Services(DHS)-certified laboratory Each sample was <br /> analyzed within 72 hours for <br /> • TPH-g in accordance with EPA Method 8015M, and <br /> • BTEX and the fuel additives MTBE, TBA, DIPE, ETBE, TAME, 1,2-DCA and EDB by <br /> EPA Method 8260 Modified <br /> 4.0 FINDINGS <br /> Soil descriptions were determmed from field data Hydrocarbon impact to soil and soil vapor was <br /> inferred from laboratory analysis of the samples <br /> Advanced GeoEnvironmental,Inc <br />