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Site Assessment Work Plan Addendum— August 2017 <br /> SAVE-ON GAS (Former Rainwater Car Wash) <br /> 420 West Yosemite Avenue, Manteca, California <br /> TABLE OF CONTENTS <br /> SECTION PAGE <br /> 1.0. INTRODUCTION...................................................................................................1 <br /> 2.0. SCOPE OF WORK................................................................................................1 <br /> 2.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES ........................................2 <br /> 2.2. DRILLING...........................................................................................................2 <br /> 2.3. SOIL AND GRAB GROUNDWATER SAMPLING..............................................3 <br /> 2.4. MONITORING WELL INSTALLATION, DEVELOPMENT, AND SURVEY.........4 <br /> 2.5. GROUNDWATER SAMPLING AND ANALYSIS................................................4 <br /> 2.6. PREPARATION OF REPORT OF FINDINGS....................................................5 <br /> 3.0. FIELD PROCEDURES..........................................................................................5 <br /> 3.1. BORING ADVANCEMENT AND SOIL SAMPLING ...........................................5 <br /> 3.2 GRAB GROUNDWATER SAMPLING................................................................5 <br /> 3.3. WELL COMPLETION AND ELEVATION SURVEY ...........................................6 <br /> 3.4. WELL DEVELOPMENT .....................................................................................7 <br /> 3.5. GROUNDWATER SAMPLING PROCEDURES................................................. 7 <br /> 3.6. EQUIPMENT DECONTAMINATIONANASTE MANAGEMENT..........................7 <br /> FIGURES <br /> Figure 1 - Location Map <br /> Figure 2 - Site Plan <br /> Figure 3 - Off-site Plan <br /> Figure 4 - Approximate Extent of Dissolved MTBE: Zone A <br /> Figure 5 - Approximate Extent of Dissolved MTBE: Zone B <br /> Figure 6 - Approximate Extent of Dissolved MTBE: Zone C <br /> Figure 7 - Approximate Extent of Dissolved MTBE: Zone D <br /> Figure 8 - Well Construction Details <br /> TABLES <br /> Table 1 - Summary of Monitoring Well Details <br /> Table 2 - Analytical Results of Grab Groundwater Samples <br /> Table 3 - Historical Groundwater Monitoring Results <br /> APPENDICES <br /> Appendix A -RWQCB Directive Letter <br /> Appendix B -Monitoring and Sampling Procedures <br />