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1 <br /> . 04 January 2002 <br /> ' AGE-NC Project No 95-0137 <br /> Page 3 of 6 <br /> 55-gallon drums The field data sheets are Included in Appendix A <br /> ' 29 GROUND WATER SAMPLE COLLECTION <br /> After purging and allowing a minimum 80 %recharge recovery of the initial water level in each well, <br /> samples were collected using the dedicated plastic bailers Each sample was transferred into three <br /> 40-m1 EPA-approved volatile organic analysis(VOA)vials and into one 1-liter amber bottle Samples <br /> ' were stored in a chilled container and transported under chain-of-custody to MAI <br /> Each sample was analyzed for <br /> • Total petroleum hydrocarbons quantified as diesel (TPH-d) and TPH-g in accordance with <br /> EPA Method 8015 Modified, <br /> • BTEX compounds and MTBE in accordance with EPA Method 8020, <br /> • Oxygenating fuel additives-tertiary butyl alcohol(TBA), di--isopropyl ether(DIPE),methyl- <br /> butyl tertiary butyl ether(MTBE), ethyl tertiary butyl ether(ETBE) and tertiary amyl methyl <br /> ether(TAME), ethylene dibrorrude(EDB) and 1,2 dichloroethane(1,2-DCA) in accordance <br /> with EPA Methods 8260 <br /> 3.0 FINDINGS <br /> Ground water elevation, flow du ection and gi adient were determined from field data collected on <br /> ' 04 October 2001, the contaminant impact to ground water was quantified from the ground water <br /> laboi atory data From field and laboratory data collected at the SVE remediation system between <br /> 10 April and 13 December 2001, AGE determined the average TPH-g concentration, the average <br /> Iflow rate and calculated the approximate mass and volume of hydrocarbons removed <br /> 3 1 SOIL VAPOR EXTRACTION <br /> ' The SVE unit operated at varying rates during the observation period Extraction flow i at es were <br /> initially calculated to range from 40 efrn up to 150 cfm An Induced vacuum (negative pressure) of <br /> approximately 14 to 30 Inches o f water was measured in the piping between the blower and extraction <br /> ' wells PI essure drops of approximately 0 2 inches and 0 015 inches was measured at well MW-1 and <br /> MW-4, distances of 10 feet and 45 feet, t espectively, from the extraction wells The SVE unit <br /> operation was continuous over the quarter <br /> ' The analytical results of the soil vapor samples are summarized on Table 1 The laboratory reports <br /> Advanced CeoEwnronmental,Inc <br /> 1 <br />