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Report-Pilot Remedial System Test Page 20 <br /> Former Manna Pro Site <br /> Project No 207 3 <br /> lie July 31, 2000 <br /> M (note that 1 millidarcy=l 0 3 cm/second) <br /> The results of the geo-technical analyses performed by PTS are attached as Appendix A-3 <br /> and are summarized in Summary Table 7 A more detailed discussion of the geo- <br /> technical data will be forthcoming in the Feasibility Study Report <br />' 6.3 Air Sample Analytical Results <br /> During the course of pilot testing, one air sample was collected from the ICE exhaust to <br /> comply with air pollution requirements, and three samples were collected from the intake <br /> connecting the vapor extraction well to the intake manifold These three samples were <br /> collected, in part, to assess the effectiveness of the vapor extraction remedial process As <br />' shown in Summary Table 2, the first sample was collected shortly after the ICE was <br /> started to provide baseline data on the gasoline vapor content Subsequent samples were <br /> collected approximately 24 hours prior to the end of the vapor extraction pilot test and <br />' again just before the test was terminated During the course of the vapor extraction test, <br /> the Total Petroleum Hydrocarbons as Gasoline (TPH-G) levels remained at a fairly <br /> consistent low level of between 1 0 and 16 ppm The BTEX compounds generally <br /> tincreased in concentration with benzene concentration rising from an initial non- <br /> detectable level to 6 9 ppb at the end of the test <br /> 1 <br /> • <br /> 2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone(209)569-0293 <br /> Modesto, CA 95356 Fax(209)569-0295 <br />