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URS <br /> Mr Mike Infurna Page 6 <br /> San Joaquin County Environmental Health Department <br /> January 5, 2004 <br /> If you have any questions or comments regarding this letter,please call me at(916) 679-2299 <br /> Sincerely, <br /> URS Corporation Americas i :ED G�Q� <br /> 5 <br /> Elarth,R G N:0'. 1Project Manager .xPVE/gngOF cp'u <br /> � <br /> ap <br /> Attachments Figure 1 Site Location ap with Production Well Locations <br /> Figure 2 Site Plan <br /> Figure 3 Site Lithology <br /> Figure 4 TPHg Distribution in Soil at Depths of 15 to 40 Feet <br /> Figure 5 TPHg Distribution in Soil at Depths of 40 to 60 Feet <br /> Figure 6 TPHg Concentrations in Groundwater(December 2002) <br /> Figure 7 Benzene Concentrations in Groundwater(December 2002) <br /> Figure 8 Extent of Benzene above 0 5 ppb in Groundwater <br /> Figure 9 Cross-Section of the Benzene Plume in Groundwater <br /> Figure 10 MtBE Concentrations in Groundwater(December 2002) <br /> Figure 11 Extent of MtBE above 5 ppb in Groundwater <br /> Figure 12 Cross-Section of the MtBE Plume in Groundwater <br /> Table 1 Well Survey Data <br /> Table 2 Ground Water Monitoring Data <br /> Table 3 Monitoring and Remediation Well Construction Information <br /> Table 4 Well Screening and Water Level Information <br /> Table 5 Historical Groundwater Flow Direction and Gradient <br /> Appendix A SJCEHD Correspondence <br /> Appendix B EDR GeoCheck® Report <br /> Appendix C Boring Logs <br /> Appendix D Mass Calculations <br /> Appendix E SVE System Operational Information <br /> Appendix F Historical Soil Analytical Results and Geologic Cross Sections <br /> cc Mr Paul Supple,Atlantic Richfield Company <br /> Project File <br /> K 1WprocessU5 BP ARC002130\Site Conceptual Model Report12130 SCM Rev 2 doc <br />