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® CONTENTS <br /> INTRODUCTION........................................................................................................................1 <br /> General...........................................................................................................................1 <br /> Geologyand Hydrogeology.............................................................................................1 <br /> Compliance History Summary.........................................................................................2 <br /> MONITORING PROGRAM .........................................................................................................7 <br /> Groundwater...................................................................................................................7 <br /> SurfaceWater.................................................................................................................8 <br /> VadoseZone Soil Gas ....................................................................................................9 <br /> Statistical Analysis of Groundwater Samples...................................................................9 <br /> MONITORING RESULTS......................................................................................................... 10 <br /> Groundwater.................................................................................................................10 <br /> Surfacewater................................................................................................................14 <br /> Unsaturated Zone Soil Pore Gas...................................................................................14 <br /> Groundwater Direction and Flow Rate..................................................:........................ 14 <br /> STANDARD OBSERVATIONS.................................................................................................16 <br /> RUN-ON AND -OFF SITE COMPONENTS OR CONTROL MEASURES .................................16 <br /> HISTORICAL TIME SERIES PLOTS........................................................................................17 <br /> MONITORING ANALYTICAL DATA (ELECTRONIC MEDIA) ...................................................24 <br /> TABLES <br /> Table 1 - Groundwater Monitoring Results, Shallow Aquifer <br /> Table 2 - Groundwater Monitoring Results, Deep Aquifer <br /> Table 3—Trend Analysis Results <br /> Table 4— Unsaturated Zone Soil Pore Gas TO-15 Monitoring Results <br /> FIGURES <br /> Figure 1 - Landfill Vicinity Map <br /> Figure 2 - Groundwater Contour and Sampling Location Map, Shallow Aquifer <br /> Figure 3 - Groundwater Contour and Sampling Location Map, Deep Aquifer <br /> Figure 4 —Well Location Map <br /> Figure 5 — PCE Contour Map <br /> is <br /> Corral Hollow Sanitary Landfill I Department of Public Works/Solid Waste <br /> 3rd Quarter 2012 Groundwater Monitoring County of San Joaquin—October 30,2012 <br />