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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2014-0006 -32- FORWARD INC.AND REPUBLIC SERVICES INC. FORWARD CLASS II LANDFILL SAN JOAQUIN COUNTY 3) a 60-mil HDPE geomembrane, overlain by a 12-ounce/sq. yard cushion geotextile (may be omitted if LCRS gravel is sub-angular to rounded); 4) a 12-inch LCRS gravel drainage layer overlain by an 8-ounce/Sq. yard separator geotextile; and 5) a 12-inch thick protective soil operations layer. b. An engineered alternative composite side slope liner system that is comprised, in ascending order, of the following: 1) Prepared subgrade of graded and compacted, fine grained native soil; 2) a (GCL) or 24-inch thick low permeability soil layer (minimum permeability 1 X 10-7 cm/sec;) 3) a 60-mil HDPE liner (single sided textured, textured side down); 4) a geocomposite drainage net; and 5) a 12-inch thick protective soil operations layer. 2. An Intermediate Liner System shall be constructed over the south slope of the existing Class III Waste Management Cell at Austin Road Landfill. The Intermediate Liner system will be constructed on top of the existing interim cover and will separate the existing Class III waste in Austin Road Landfill from new Class III waste. The Intermediate Liner System shall be comprised, in ascending order, of the following: 1) One-foot of existing refuse cover soil; 2) one-foot of additional foundation soil; 3) a 24-inch thick low permeability soil layer (minimum permeability of 1 X 10-7 cm/sec) or GCL liner; 4) a 60-mil HDPE geomembrane (textured); 5) drainage geocomposite; and 6) a 12-inch thick protective soil operations layer. 3. The Discharger shall construct the liner of any new Class II surface impoundment units as described in Finding 6 of this Order in accordance with the following approved prescriptive liner: 1) Prepared subgrade of graded and compacted, native soil;