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Report:Groundwater-quality Monitoring—October 25,2002: 7500 West Eleventh Street, Tracy, CA. Page i <br /> Table of Contents <br /> PROFESSIONAL CERTIFICATION AND LIMITATIONS........................... <br /> 1.0 INTRODUCTION <br /> 1.1 Site Location <br /> 1.2 Site Codes <br /> --j <br /> 1.3 Background..............................................................................................................2 <br /> 1.4 Geology and Hydrogeology.............................. 3 <br /> 1.5 Distribution of Hydrocarbons in the Subsurface .................................................. . 4 <br /> 2.0 OCTOBER 25, 2002 GROUNDWATER SAMPLING AND ANALYSIS................ 6 <br /> 2.1 Groundwater Elevations and Flow Direction .......................................................... 6 <br /> 2.2 Purging of Monitoring Wells................................................................................... 8 <br /> 2.2.1 Disposal of Purge Water................................................................................... 8 <br /> 2.3 Recovery of Groundwater Samples from Monitoring Wells................................... 8 <br /> 2.4 Analyses of Groundwater Samples.......................................................................... 9 <br /> 2.5 Contaminated Water in Monitoring Well MW-12 Well-head Box....................... 13 <br /> is 3.0 FUTURE ROUNDS OF GROUNDWATER SAMPLING AND ANALYSIS ........ 15 <br /> 4.0 REFERENCES .......................... <br /> ................................................................................ 16 <br /> TABLES <br /> Table 1: Depths to Groundwater <br /> Table 2: Results of Analyses of Samples of Groundwater <br /> FIGURES <br /> Figure 1: Site Location <br /> Figure 2. Groundwater Contours—October 25, 2002 <br /> Figure 3: Affected Soil in Cross Section A-A' <br /> Figure 4: Affected Soil in Cross Section B-B' <br /> Figure 5: Affected Soil in Cross Section C-C' <br /> APPENDICES <br /> F <br /> APPENDIX A: Field Notes <br /> APPENDIX B: Laboratory Certificates of Analysis <br /> sic <br />