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I <br />' 16 May 2002 <br /> AGE-NC Project No 97-0343 <br /> Page 2 of 4 <br />' concentrations,the induced vacuum potential at the observation points,extracted soil gas flow rate, <br /> and revolutions per minute(RPM) of the SVE unit were measured at 0 5-hour intervals and logged <br /> on field sheets Pilot test data are summarized in Table 1 <br /> 22 SVE PILOT TEST SAMPLING AND ANALYSIS <br /> A total of four soil gas/vapor samples were collected during the pilot test Soil gas/vapor samples <br /> were collected at two-hour intervals from the sample port of the extraction well to measure <br /> hydrocarbon concentrations in the extracted gas/vapor The samples were collected in Tedlar bags <br /> using an air pump Samples were transported in a chilled container under chain-of-custody to Mc <br /> Campbell Analytical, Inc (MAI), a California Department of Health Services (DHS)-certified <br />' laboratory Each sample was analyzed within 72 hours for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g), benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX) and methyl tertiary butyl ether (MTBE) in <br /> accordance with EPA Methods 8015 and 8020 <br /> 3.0 FINDINGS <br /> Analytical results of soil gas/vapor samples and pilot test results are based on field data collected on <br /> 14 January 2002 <br /> 3 1 ANALYTICAL RESULTS OF SOIL GAS SAMPLES <br /> TPH-g was detected in the soil gas/vapor samples (vapor samples) at concentrations ranging from <br /> 1,300 pg/l to 2,700 µg/1 Toluene, ethylbenzene and total xylenes were detected in the gas/vapor <br /> samples at concentrations as high as 47µg11 toluene,30µg11 ethylbenzene and 220µg/1 total xylenes <br /> (Influent 1602) Benzene and MTBE were not detected at or above laboratory reporting limits in the <br /> gas/vapor samples Analytical results of the gas/vapor samples are included in Table 2 Laboratory <br /> data for the soil gas/vapor data is included in Appendix A <br /> 32 RESULTS OF SVE PILOT TEST <br /> I The SVE unit was operated at approximately 2,300 RPMs for the eight-hour test The flow rate was <br /> measured between 25 cfm (standard cubic feet per minute) and 30 scfm for the eight-hour test <br /> E <br /> Advanced GcoEnvironmental,Inc <br />