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0 <br /> California Regional Water ality otrol oar <br /> �'� Central Valley Region £ ,a 01 r� . °�:A[..I II <br /> Robert Schneider,Chair f C <br /> Winston H.Hickox Cray Davis <br /> Secretaryjor Sacramento Main Office SEP 18 Pm ! IT Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/rwgc <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(91 G)255-3000•FAX(91 G)255-3015 <br /> 11 September 2003 <br /> Mr. Kevin Basso <br /> General Manager <br /> Forward Inc. <br /> 1145 West Charger Way <br /> Stockton, CA 95206 <br /> REVIEW OF DESIGN REPORT FOR THE WASTE MANAGEMENT UNIT FU-03 AND WMU <br /> F-WEST, FORWARD LANDFILL, SAN JOAQUIN COUNTY (Case No. 2209) <br /> We have reviewed the Design Report for the Waste Management Unit FU-03 and WMUF-West <br /> submitted on 27 August 2003. The report presents design drawings, engineering calculations, <br /> specifications, clay acceptance program and construction quality assurance procedures for construction <br /> of a new waste management unit(WMU) for solid waste WMU FU-03, a leachate impoundment WMU <br /> F-West and a storm water desalting basin(Desilting Basin). The report addresses the following issues: <br /> 1. Design of solid waste landfill unit, leachate impoundment and storm water desilting basin <br /> including base and final grades, composite liners (for the WMUs), and leachate collection and <br /> removal systems; <br /> 2. WMU FU-03 is designed to control inundation,washout, erosion, and slope failure resulting <br /> from flooding caused by a 24-hour, 1,000 year storm; <br /> 3. Seismic hazard analysis that indicate that the Forward Landfill site is not located within 200 feet <br /> of a Holocene fault and complies with the regulatory provisions regarding active faults; and <br /> 4. Slope stability calculations to demonstrate that the design for WMU FU-03 will withstand the <br /> Maximum Credible Earthquake without damaging the liners or the leachate or surface drainage <br /> control systems; <br /> 5. WMU FU-03 will have a base liner, side slope liners and an interface liner with adjacent Austin <br /> Road WMU designed to conform to the requirements of Title 27, Subtitle D and the facility <br /> Waste Discharge Requirements; <br /> 6. WMU F-West is designed as a Class H impoundment,with double liner and a leachate collection <br /> system; and <br /> 7. The Desilting Basin is designed to fit the space available. <br /> The design for WMU FU-03 includes a base liner, side slope liners and an interface liner with the <br /> adjacent Austin Road WMU. Approximately 4 feet of compacted fill will be installed between the <br /> Austin Road WMU and the interface liner. The additional fill will bridge over any voids that may <br /> develop in Austin Road waste thus preventing damage to the FU-03 liner. The base liner system is <br /> composed of a 2-foot thick clay layer(conductivity< 10`cm/sec), overlain with a 60-mil thick,high- <br /> density polyethylene(HDPE) geomembrane. The base lining system complies with the Title 27 <br /> California Environmental Protection Agency <br /> Co Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/rwgeb5 <br />