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' 07 May 1999 <br /> AGE-NC Project No 95-0104 <br />' Page 5 of 8 <br /> Toluene and xylenes were detected from MW-4 at a concentration of 12 yg/l No other BTEX <br />' compounds were detected above laboratory reporting limits from the analyzed samples <br /> MTBE was not detected above laboratory reporting limits for any of the analyzed samples utilizing <br /> IEPA Methods 8020 and 8260 No other fuel oxygenated additives were detected above Iaboratory <br /> reporting limits from the analyzed samples <br /> IAnalytical results of the ground water samples are summarized in Table 2 The laboratory reports <br /> (Alpha Analytical Laboratories Inc Batch 99-0428-006) and chain-of-custody forms are presented <br />' in Appendix B <br />' <br /> 43 RESULTS OF VAPOR EXTRACTION PILOT TEST <br /> ;Z1 I-rJc'y5 <br /> The SVE/IAS pilot test was operational for 590 hours During the operational period, flow rates <br /> ranged from 20 to 78 standard cubic feet per minute (scfm) at 0 15 to 2 15 inches of water of <br /> differential pressure Time induced vacuum stabilized at approximately 0 75 inches of water during <br /> • the pilot test Hydrocarbon concentrations were measured at regular intervals at the VES inlet prior <br /> to air dilution PID field measurements ranged as high as 3,760 parts per million (ppm) at the <br /> beginning of the pilot test and were recorded as low as 650 ppm near the end of the pilot test Field <br /> measurements are summarized in Table 4 <br /> 44 ANALYTICAL RESULTS OF SOIL GAS SAMPLES <br /> During the SVE pilot test, TPH-g was detected in soil gas samples collected from VW-1 at <br />' concentrations ranging as high as 11,000,ug/l <br /> BTEX compounds were detected in soil gas samples collected from VW-1 at concentrations up to <br /> I810 )ug/l Concentrations of benzene were encountered from VW-I at concentrations ranging <br /> between 2 8 pg/l and 15 mg/1 Analytical results of soil gas samples are summanzed in Table 3 The <br /> laboratory report(McCampbell Analytical Inc Lab I D 05737, 08471, 08907 and 09291) and chain- <br /> of-custody <br /> hain- <br /> ofcustody forms are presented in Appendix C <br /> 45 MASS CALCULATION OF RECOVERED PRODUCT <br /> IThe hydrocarbon mass removed during the operating period was calculated using the following <br /> • equation M = C•Q•t <br /> where M = cumulative mass recovered (kg) <br /> Advanced GeoEnvironmentsl,Inc <br /> I <br />