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3.7 Hydrogeology.......................................................................................................3-9 3.7.1 Regional Hydrogeology........................................................................3-9 3.7.2 Local Aquifers.................................................................................... 3-10 3.7.3 Local Wells......................................................................................... 3-10 3.7.4 Groundwater Flow Direction and Gradient ...................................... 3-11 3.7.5 Hydraulic Conductivity and Groundwater Velocity Estimates ........ 3-11 3.7.6 Regional Water Quality..................................................................... 3-12 3.7.7 Site Groundwater Quality.................................................................. 3-13 3.7.8 Groundwater Wells Within One Mile ................................................ 3-16 4.0 WASTE MANAGEMENT UNITS...........................................................................................4-1 4.1 Existing Facilities.................................................................................................4-1 4.1.1 Permitted Waste Management Units.................................................4-1 4.1.2 Current Resource Recovery Activities.................................................4-4 4.1.3 Landfill Ancillary Facilities...................................................................4-4 4.2 Permitted Waste Stream....................................................................................4-5 4.3 Waste Stream......................................................................................................4-7 4.3.1 Materials Accepted for Beneficial Reuse...........................................4-8 4.3.1.1 Beneficial Reuse Records .................................................... 4.3.2 4-10 Traffic Limitations............................................................................. 4-10 4.4 Waste Inflow Rates.......................................................................................... 4-11 4.5 Refuse to Cover Ratio...................................................................................... 4-11 4.6 Site Capacity..................................................................................................... 4-11 4.7 Site Life Projection........................................................................................... 4-12 4.7.1 Site Life Calculations........................................................................ 4-12 4.7.2 Factors Affecting Site Capacity........................................................ 4-12 5.0 DISPOSAL SITE DESIGN.....................................................................................................5-1 5.1 Introduction.........................................................................................................5-1 5.2 Design Plans........................................................................................................5-1 5.2.1 Lower Base Grades in Waste Management Units.............................5-1 5.2.2 Liner and LCRS Components..............................................................5-2 5.2.2.1 Base Liner System...................................................................5-2 5.2.2.2 Slope Liner System..................................................................5-2 5.2.2.3 Interim Final Cover...................................................................5-3 5.2.2.4 Intermediate Liner System......................................................5-3 5.2.2.5 Surface Impoundment Units Liner System ............................5-4 0 5.2.3 Final Grading........................................................................................5-4 Forward Landfill SWT Engineering Joint Technical Document - April 2014; Amended June 2014 z:\projects\allied waste\forward\five year permit rvw 2013\jtd-5 yr pr 2013\text\jtd toc.doc:06/26/14