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• ADDITIONAL ACTIVITIES PERFORMED AT SITE <br />' An air sparging pilot test was conducted in September 2004 as part of an assessment of ozone <br /> sparging as a remedial technology for the site The results of the air sparging pilot test were <br />' submitted under separate cover <br /> Three infection point pairs (IPI, IP2, and IP3) and one exploratory boring (EBI) were installed in <br />' September 2004 The investigation results will be presented under separate cover <br />' Groundwater samples collected from the injection point pairs (IPI, IP2, and IP3) and V4 were <br /> analyzed for manganese The laboratory analytical results are included in Appendix C and are <br /> presented in Table 6 <br />' ETIC submitted a Work Plan for Benchscale Study and Oxidant Infection Pilot Tests to the San <br /> Joaquin County Public Health Services in December 2004 <br /> WORK PROPOSED FOR NEXT QUARTER <br />' Groundwater will be monitored in accordance with the attached groundwater monitoring plan <br /> I . The WB system will remain shut down <br />' Attachments <br /> Figure 1 Site Plan Showing Groundwater Elevations and Analytical Results <br /> Figure 2 Site Map Showing Offsite Groundwater Monitoring Well Locations <br />' Figure 3 Influent TPH-g Concentrations and Estimated Mass of TPH-g Removed by UVB <br /> System <br />' Figure 4 Influent Benzene Concentrations and Estimated Mass of Benzene Removed by <br /> WB System <br />' Table 1 Well Construction Details <br /> Table 2 Groundwater Monitoring Data <br /> Table 3 Groundwater Monitoring Plan <br />' Table 4 Operation and Performance Data -WB System <br /> Table 5 Summary of Analytical Results - UVB System <br /> Table 6 Additional Groundwater Analytical Results <br /> Appendix A Field Protocols <br /> Appendix B Field Documents <br />' Appendix C Laboratory Analytical Reports <br /> I <br />' &\P-Iccts173942Vflw \wp1q]204�3942[aadoc 5 <br />