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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Winston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 28 August 2001 <br /> 90 bj`j <br /> Mr. Kevin Basso <br /> General Manager <br /> Forward Inc. <br /> 1145 West Charger Way <br /> Stockton, CA 95206 <br /> REVIEW OF CONSTRUCTION QUALITYASSURANCEREPORTFOR WASTE <br /> MANAGEMENT UNIT D-01, FORWARD LANDFILL, SAN JOAQUIN COUNTY <br /> We have reviewed the Construction Quality Assurance Report for Waste Management Unit D-01 <br /> submitted on 9 August 2001 by Holdrege and Kull. The report documents the construction and CQA <br /> procedures for the new Class 11 Waste Management Unit (WMU)D-01. The report addresses: <br /> preparation of the subgrade; investigation of clay sources including results of two sealed double ring <br /> infiltrometer tests; construction of a compacted clay liner; installation of Geosynethetic clay liner on side <br /> slopes; placing high density polyethylene geomembrane to form a composite base liner; constructing a <br /> LCRS of geocomposite drainage net on the side slopes and gravel drainage blanket on the base; <br /> constructing LCRS sumps with pan lysimeters and placing the soil operations layer. GCL panels were <br /> installed on the compacted clay liner at selected locations where the clay thickness was less than the <br /> required minimum of two feet. Clay thickness was reduced in those locations to maintain necessary <br /> grade in leachate collection pipes. �f,, <br /> Holdrege and Kull report that based on observations and test results they believe that the base liner was <br /> constructed in general compliance with construction plans and specifications, good engineering <br /> construction practices, and the requirements of Title 27. Based on the CQA report, on supporting test <br /> results and design documents WMU D-01 is approved for waste discharge operations in accordance with <br /> the facility's waste discharge requirements. <br /> If you have any questions, please call me at (916) 255-3814. <br /> ROSS D. ATKINSON <br /> Associate Engineering Geologist <br /> cc: Mr. Robert McClellan, San Joaquin County LEA, Stockton <br /> Mr. Geno Yekta, CIMWB, Sacramento. <br /> Mr. Butch Stafani, Forward Landfill Operations Manager, Stockton. <br /> Ms. Sangeeta Lewis, Lewis Engineering, Piedmont. <br /> Mr. Curt Fuji, Forward Inc. <br /> California Environmental Protection Agency <br /> �a 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/rwgcb5 <br />