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DRAFT [TENTATIVE] WASTE DISCHARGE REQUIREMENTS ORDER R5-2023-OOXX 56 <br /> FORWARD, INC. <br /> FORWARD LANDFILL <br /> SAN JOAQUIN COUNTY <br /> Sump Filter Fabric Geotextile separator (8 oz/yd') <br /> Sump LCRS Gravel filled LCRS sump with access pipe <br /> Sump Composite Liner 60-mil HDPE Geomembrane <br /> Geosynthetic clay liner (GCL) <br /> Sump Foundation Layer 6-inch compacted soil <br /> Pan Lysimeter Gravel filled pan lysimeter with access pipe <br /> 60-mil HDPE Geomembrane <br /> Composite Liner Geosynthetic clay liner (GCL) or 24-inch thick low- <br /> permeability soil (minimum permeability <br /> 1 x 10-7 cm/sec) <br /> Foundation Layer Prepared subgrade (graded and compacted native soil) <br /> Note: Pan lysimeters installed beneath the LCRS sump in each new landfill cell/module for <br /> the purpose of vadose zone monitoring. <br /> 4. Intermediate Liner— from top to bottom: <br /> Component Base <br /> Operations Layer 12-inch thick protective cover soil <br /> Cushion Layer Geocomposite drainage net <br /> 60-mil HDPE Geomembrane <br /> Composite Liner 24-inch thick low-permeability soil <br /> (minimum permeability 1 x 10-7 cm/sec) or geosynthetic clay <br /> liner (GCL) <br /> Foundation Layer Min 12-inch foundation soil <br /> 12-inch existing soil cover <br /> Note: Intermediate liner system were constructed to separate Class III waste in unlined or <br /> non-Subtitle D lined existing WMUs from adjacent Class II WMUs. Intermediate liner <br /> systems were utilized for WMU ART-03, WMU FU-04 North, WMU FU-05 North, WMU FU- <br /> 06 North, and WMU FU-08 North. <br />