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20 March 1996 <br /> AGE-NC Project No 95-0130 <br /> Page 6 of 23 <br />' 3 9 ANALYTICAL RESULTS OF SOIL SAMPLES <br />' 3 9 1 PETROLEUM HYDROCARBONS <br />' A total of twenty-one soil samples were submitted to Alpha Analytical Laboratories Inc (AAL), a <br /> California State-certified laboratory for analysis TPH-g was detected in samples collected from VW- <br /> 1 through VW-3, and MW-5 at concentrations as high as 7,400 mg/kg (milligrams per kilogram or <br /> parts per million ppm) BTE&X were detected in soil samples from the same borings at <br /> concentrations up to 480 ppm (VW 1-15) <br /> Analytical results for soil samples are summarized in Table 1 The laboratory report (AAL Laboratory <br /> Batch Nos 95-1208-001, 95-1213-015, 95-1213-032 and 96-1023-007) and chain-of-custody are <br /> included in Appendix B <br /> 3 9 2 MICROBIAL ENUMERATION AND PHYSIOCHEMICAL ANALYSIS <br /> Fa Four soil samples were submitted to A Keith Kaufmann for microbial enumeration and <br /> physicochemical analysis to determine feasibility of bioremediation at the site Results of the <br /> 1 bioremediation analysis indicate that the physicochemical conditions at the site are inadequate to <br /> support microbial growth and bioremedial activity The analysis indicated that some areas of toxicity <br /> to the microbes are present at the site, possibly due to agents such as heavy metals in the soil The <br />' laboratory reports, dated 17 and 30 January 1996, are included in Appendix C <br />' 4.0. SOIL VAPOR EXTRACTION PILOT TEST <br />' 41 SOIL VAPOR EXTRACTION SYSTEM <br /> On 19 January 1996, an 8-hour soil vapor extraction (SVE) test was initiated The pilot test was <br /> performed to provide soil vapor extraction data for feasibility analysis and potential design of a <br /> remediation system based on soil vapor extraction <br />' The test was conducted using a VACLEEN 1000G SVE system, manufactured by Environmental <br /> Techniques The VES consists of a positive-displacement blower, driven by an internal combustion <br /> (IC) engine The inlet of the VES was connected to extraction well VW-1-B (screened interval 28 <br /> to 43 feet bsg) The vacuum applied to the extraction well causes hydrocarbons in the soil to volatilize <br /> and flow through the vacuum pump to the IC engine The induced vacuum was measured at <br /> surrounding monitoring points using Magnehelic vacuum gauges <br /> The hydrocarbon vapors produced were destroyed as part of the normal internal combustion process <br />