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Design and Operations Plan <br />Western Gravel E & P Waste Disposal Facility <br />Table of Contents <br />October 24, 2011 <br />Page i of iii <br />1.0 ADMINISTRATIVE INFORMATION 1 <br />1.1 INTRODUCTION 1 <br />1.2 GENERAL INFORMATION 2 <br />1.2.1 Legal Description 3 <br />1.2.2 Adjacent Property Owners 3 <br />1.2.3 Mineral Rights 4 <br />2.0 FACILITY DATA 5 <br />2.1 GENERAL DESIGN CONCEPTS 5 <br />2.2 LOCATION RESTRICTIONS AND FACILITY STANDARDS 6 <br />2.3 ENVIRONMENTAL SETTING 7 <br />2.3.1 Archaeological Inventory 7 <br />2.3.2 Geologic Conditions 7 <br />2.3.2.1 Geologic Setting 7 <br />2.3.2.2 Unconsolidated Materials 8 <br />2.3.2.3 Bedrock Materials 9 <br />2.3.2.4 Local Structural Geology 9 <br />2.3.2.5 Geologic Hazards 9 <br />2.3.2.6 Slope Stability 10 <br />2.3.3 Hydrogeologic Conditions 11 <br />2.3.3.1 Regional Groundwater Occurrence 11 <br />2.3.3.2 Regional Groundwater Quality 11 <br />2.3.3.3 Regional Surface Water 12 <br />2.3.3.4 Regional Surface Water Quality 12 <br />2.3.3.5 Climatic Data 12 <br />2.3.3.6 Site Surface Hydrology 13 <br />2.3.3.7 Site Groundwater 13 <br />2.3.3.8 Vicinity Domestic Wells/Water Supplies 14 <br />2.3.4 Environmental Impact Assessment 14 <br />2.4 ENGINEERING DATA 15 <br />2.4.1 Test Pits 15 <br />2.4.2 Boreholes 16 <br />2.4.3 Geotechnical Evaluation 17 <br />2.4.4 Fluid Transport 18 <br />3.0 FACILITY DESIGN AND OPERATIONS 20 <br />3.1 WASTE CHARACTERISTICS 20 <br />3.2 SITE CAPACITY AND LIFE EXPECTANCY 20 <br />3.3 SOIL REQUIREMENTS AND AVAILABLITY 20 <br />3.4 CELL CONSTRUCTION AND WASTE MANAGEMENT 21 <br />3.4.1 Cell Progression 21 <br />3.4.2 Excavations 21 <br />3.4.3 Soil Materials Management 22 <br />3.4.4 Liner System 23 <br />3.4.5 Leak Detection System (LDS) 23 <br />3.4.5.1 LDS Construction 24 <br />3.4.5.2 LDS Operations 24 <br />3.4.6 Leachate Collection and Removal System (LCRS) 25 <br />3.4.6.1 LCRS Construction 25 <br />3.4.6.2 LCRS Operations 26 <br />3.4.7 Waste Cell Construction 27 <br />3.4.8 Daily and Interim Cover Placement /Air Emissions 27 <br />3.4.9 Final Cell Cover Placement 28 <br />3.4.9.1 Final Cover System 28 <br />3.4.9.2 HELP Model 29 <br />NWCC, Inc. <br />