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• Subsurface Investigation Report - - - - <br /> CHP Facility, 385 West Grantline Road, Tracy <br /> A n120 1999 <br /> Concentrations of MTBE detected in groundwater samples SB-1 through SB-4 are 3 ppb, 940 ppb, 38 <br /> ppb, and 62 ppb, respectively Refer to Table 2 and Figure 4 for a summary of soil sample analysts <br /> results <br /> 5.0 LIST OF ATTACED4 ENTS <br /> • Figure 1: Site Vicinity Map <br /> • Figure 2 Site Plan with Boring Locations <br /> • Figure 3 Hydrocarbon Concentrations in Soil <br /> • Figure 4 Hydrocarbon Concentrations in Groundwater <br /> • Table 1. Summary of Soil Sample Analysis <br /> • Table 2 Summary of Groundwater Sample Analysis <br /> • Appendix A- Boring Logs and General Field Procedures <br /> • Appendix B Analytical Methods Official Laboratory Reports and Cham of Custody <br /> Records <br /> If you have any questions regarding this report, please call me at (925) 606-9150, extension 108 <br /> Sincerely, <br /> ALTON GEOSCIENCE <br /> Jacob Madden Tracy L Walker, RG <br /> Project Geologist Associate <br /> o aEo� <br /> Attachments <br /> cc A K Jam, State of California No 9 <br /> • Ligaya Reyes-Ibanez, California Highway Patrol <br /> a <br /> P 1 %ptnjectalCHPlTrecylUncy an <br />