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References <br /> DWR(Department of Water Resource), 2006; San Joaquin Valley Groundwater Basin Eastern <br /> San Joaquin Subbasin,updated January 20, 2006. <br /> Hackel, 1966; Summary of Geology of the Great Valley, Geology of Northern California, <br /> California Division of Mines and Geology Bulletin 190, 1966. <br /> USGS (United States Geological Service) 1986, Geology of the Fresh Ground-Water Basin of <br /> the Central Valley, California, with Texture Maps and Sections, U.S. Geological Survey <br /> Professional Paper 1401-C, 1986. <br /> Attachments: <br /> Table 1 Historical Groundwater Levels and Chemical Analysis Results <br /> Table 2 Well Construction Summary <br /> Figure 1 Site Location Map <br /> Figure 2 Site Vicinity Sketch <br /> Figure 3 Site and Site Vicinity Sketch Showing Groundwater Monitoring Well, Dual Phase <br /> Extraction Well, Soil Boring, and Proposed CPT Boring and Biosparge Well <br /> Locations <br /> Figure 3A Site Sketch Showing Groundwater Monitoring Well, Dual Phase Extraction Well, <br /> Soil Boring, and Proposed CPT Boring and Biosparge Well Locations <br /> Figure 4 Site Sketch Showing Subsurface Geologic Section Locations A-A', B-B' & C-C' <br /> Figure 5 Subsurface Cross-section A-A' Showing Benzene Concentrations in Groundwater <br /> on May 23 and 24, 2023 <br /> Figure 6 Subsurface Cross-section B-B' Showing Benzene Concentrations in Groundwater <br /> on May 23 and 24, 2023 <br /> Figure 7 Subsurface Cross-section C-C' Showing Benzene Concentrations in Groundwater <br /> on May 23 and 24, 2023 <br /> Figure 8 Rose Diagram Showing Historic Groundwater Flow Directions in Shallow <br /> Screened Groundwater Monitoring Wells <br /> Figure 9 Rose Diagram Showing Historic Groundwater Flow Directions in Intermediate <br /> Screened Groundwater Monitoring Wells <br /> Figure 10 Rose Diagram Showing Historic Groundwater Flow Directions in Deep Screened <br /> Groundwater Monitoring Wells <br /> Appendix A RWQCB August 30, 2023 Directive Letter <br /> Appendix B Field Procedures <br /> Appendix C Health and Safety Plan <br /> FREY Environmental, Inc. 7 Project No. 1175-01 <br />