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5.2.5. Runon/Runoff Volume/Pattern .................................................................20 5.2.6. Wind Rose.................................................................................................21 5.3. GEOLOGY............................................................................................................21 5.3.1. Geologic Setting........................................................................................22 5.3.1.1. Regional Geology..............................................................22 5.3.1.2. Site Geology......................................................................23 5.3.1.3. Regional Faulting and Seismicity .....................................23 5.3.1.4. Engineering and Chemical Properties of Soil...................24 5.3.1.5. Stability Analysis..............................................................24 5.4. Hydrogeologic Setting...........................................................................................25 5.4.1. Regional Hydrogeology............................................................................25 5.4.2. Site Hydrogeology.....................................................................................25 5.4.2.1. Hydraulic Conductivity.....................................................25 5.4.2.2. Groundwater Flow.............................................................26 5.4.2.3. Capillary Rise....................................................................26 5.4.2.4. Springs...............................................................................27 5.4.3. Groundwater Quality.................................................................................27 5.4.3.1. Regional Groundwater Quality.........................................27 5.4.3.2. Site Groundwater Quality..................................................28 5.5. SURROUNDING LAND AND GROUNDWATER USE...................................29 5.5.1. Land Use ...................................................................................................29 5.5.2. Groundwater Use.......................................................................................29 6 FACILITIES CONSTRUCTION AND DESIGN........................................................30 6.1. INTRODUCTION.................................................................................................30 6.2. DESIGN PLANS...................................................................................................31 6.2.1. Previous Designs.......................................................................................31 6.2.2. Future Designs...........................................................................................32 6.3. CONSTRUCTION SEQUENCING PLANS........................................................33 6.3.1. Excavation/Stockpiling Plans....................................................................33 6.3.2. Base Preparation/Liner Placement Plans...................................................34 6.3.3. Fill Sequencing Plans................................................................................34 6.4. LEACHATE COLLECTION AND REMOVAL SYSTEM................................35 6.5. SURFACE DRAINAGE PLANS .........................................................................35 6.6. GAS MANAGEMENT PLAN..............................................................................35 6.7. ENVIRONMENTAL MONITORING .................................................................36 6.8. FINAL GRADING PLAN....................................................................................37 7 LANDFILL OPERATIONS...........................................................................................39 7.1. OPERATING CRITERIA.....................................................................................39 7.1.1. Hours of Operation....................................................................................39 7.1.2. Records......................................................................................................39 7.1.3. Site Security and Access...........................................................................41 7.1.4. Ancillary and Other Site Facilities............................................................42 7.1.5. Sanitary Facilities......................................................................................42 7.1.6. Potable Water Supply................................................................................42 7.1.7. Communications and Early Warning Systems..........................................42 Foothill Sanitary Landfill Page iii of v Public Works/Solid Waste JTD County of San Joaquin—Revised 10/6/05