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California Regional Water Quality Control Board <br /> Dr.Alan Lloyd Central Valley Region <br /> Secretaryfor Arnold Schwarzenegger <br /> Environmental Robert Schneider,Chair Governor <br /> Protection <br /> 11020 Sun Center Drive#200 Rancho Cordova,CA 95670-6114 <br /> (916)464-3291 -Fax(916)464-4775 _11 <br /> http://www.swrcb.ca.gov/rwgcb5 o r s' :' ask L <br /> 4 October 2005 <br /> Mr. Kevin Basso <br /> General Manager <br /> Forward Inc. <br /> 1145 West Charger Way <br /> Stockton, CA 95206 <br /> REVIEW OF FINAL CONSTRUCTION QUALITYASSURANCE REPORT FOR WMUFU- <br /> 05, (CENTRAL PORTION), FORWARD LANDFILL, SAN JOAQUIN COUNTY <br /> Central Valley Regional Water Quality Control Board staff(staff)has reviewed the Final Construction <br /> Quality Assurance Report for WMU FU-05, (Central Portion) at the Forward Landfill submitted on 15 <br /> September 2005. The report documents construction and CQA procedures for the Central Portion of a <br /> new Class II Waste Management Unit (WMU)FU-05. <br /> The base liner for FU-05 consists of from bottom to top: a prepared subgrade, a minimum 2-foot <br /> compacted clay liner, 60-mil HDPE geomembrane, a 12 oz/yd2 cushion geotextile, a minimum 1-foot <br /> of granular drainage layer, 8-oz/yd2 filter fabric, and minimum 1-foot operations layer; and the side <br /> slope liner consists of. a prepared subgrade, a Geosynethetic clay liner(GCL), a 60-mil HDPE <br /> geomembrane, geocomposite drainage layer and a minimum 1-foot operations layer(constructed in 10- <br /> foot lifts as the unit fills). Where the unit is constructed over the capped Austin Road Landfill the liner <br /> consists of 5-feet of engineered fill, GCL, 60-mil HDPE, a geocomposite drainage layer and a <br /> minimum 1-foot thick operations layer(to be placed as needed during operations). The report <br /> addresses: preparation of the subgrade; construction of a compacted clay liner; installation of <br /> Geosynethetic clay liner on side slopes; placing HDPE geomembrane to form a composite base liner; <br /> constructing a LCRS of geocomposite drainage net on the side slopes and gravel drainage blanket on <br /> the base; constructing LCRS sumps; and placing the soil operations layer. <br /> Vector Engineering conducted the CQA observations and testing during construction of the waste <br /> management unit. Vector states that the composite liner system has been constructed and completed in <br /> general accordance with the project plans and specifications with approved clarifications and <br /> modifications, Title 27 and Construction Quality Assurance Manual WMU FU-05. Based on the CQA <br /> report,on supporting test results and design documents the Central Portion of WMU FU-05 is <br /> approved for waste discharge operations in accordance with the facility's waste discharge <br /> requirements. <br /> California Environmental Protection Agency <br /> Qa Recycled Paper <br />