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] TI <br /> . DISCUSSION <br /> Results of this monitoring event indicated that levels of dissolved gasoline hydrocarbons are consistent <br /> with levels detected during previous sampling events The groundwater gradient and direction of <br /> groundwater flow were also consistent with previous data Groundwater elevation decreased <br /> approximately 0 63 foot from the previous sampling event (November 1995) <br /> The SVE system is operating efficiently to reduce petroleum hydrocarbon impact to sod and <br /> groundwater A cumulative amount of 19,072 pounds of TPHG has been removed since commencing <br /> SVE activities (see Table 4) <br /> EMCON will continue to maintain and optimize the system <br /> ATTACHMENTS <br /> • Table 1 Groundwater Monitoring Data <br /> • Table 2 Operational Uptime Information <br /> • Table 3 Results of Analyses of Air Samples and Flow Rates <br /> • Table 4 Extraction and Emission Rates <br /> • Figure 1 Site location Map <br /> • Figure 2 Generalized Site Plan <br /> • Figure 3 Groundwater Contour Map (February 5, 1996) <br /> • Appendix A Sampling and Analysis Procedures <br /> • Appendix B laboratory Analytical Reports and Chain-of-Custody Records <br /> • Appendix C Field Data Sheets <br /> • cc Elizabeth Thayer, California Regional Water Quality Control Board <br /> SAC\N\Pj0K0805\08051140 6AS-95\cjb 1 <br />