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Ms. Lori Duncan <br /> Page 4 of 5 <br /> San Joaquin County Environmental Health Department <br /> November 23, 2005 <br /> ! If you have any questions or comments please call me at(916)679-2299. <br /> i <br /> Sincerely, ER�D GEp <br /> URS Corporation Americas \c�'C <� <br /> �� ON PRtlt <br /> No. 7120 <br /> L <br /> Vernon Elarth, R.G * Exp. <br /> Project Manager <br /> Attachments: i Figure I — Site <br /> 9 OF CAI-�F��� <br /> g Ste Location Map <br /> Figure 2 - Site Plan and Cross-Section Plan View <br /> �i Figure 3 — GRO in Groundwater 25' -45' bgs <br /> Figure 4 —GRO in Groundwater 45' -60' bgs <br /> Figure 5 — Benzene in Groundwater 25' -45' bgs <br /> Figure 6 — Benzene in Groundwater 45' - 60' bgs <br /> Figure 7 —MtBE in Groundwater 25' -45' bgs <br /> Figure 8 —MtBE in Groundwater 45' -60' bgs <br /> Figure 9 — Groundwater Elevation Contours <br /> Figure 10— GRO in Groundwater Cross-Section A-A' <br /> Figure I I —GRO in Groundwater Cross-Section B-B' <br /> Figure 12---Benzene in Groundwater Cross-Section A-A' <br /> Figure 13—Benzene in Groundwater Cross-Section B-B' <br /> Figure 14--MtBE in Groundwater Cross-Section A-A' <br /> Figure 15—MtBE in Groundwater B-B' <br /> Table i — Groundwater Gradient Data <br /> Table 2 — Well Construction Summary <br /> Appendix A— SJCEHD Correspondence <br /> Appendix B— Boring Logs for MW-7 and MW-8 <br /> Appendix C— December 2004 Soil Sampling and Analytical Results <br /> �+ Appendix D— Historical Groundwater Sampling and Analytical Results <br /> cc: Mr. Paul Supple,Atlantic Richfield Company <br /> 1 Mr. James Barton,Regional Water Quality Control Board—Central Valley Region <br /> Project File <br /> 1 KAWprocessUS BP ARCd100548%2005 SCM Update\SCM Update Text.doc <br />