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I* I INTRODUCTION 1.1 Purpose This Construction Quality Assurance (CQA) Manual has been prepared for Forward, Inc. (Forward) by a Registered Civil Engineer in accordance with Title 27, California Code of Regulations (CCR), Division 2, Sections 20323 and 20324, titled "CQA Plan and CQA Requirements." This manual describes CQA procedures for construction of the liner and leachate collection and removal system (LCRS) for Waste Management Unit FU -06 (WMU FU -06). The CQA Manual outlines the specific field and laboratory testing and monitoring procedures required to demonstrate that WMU FU -06 is constructed in accordance with Title 27 requirements. The southern portion of WMU FU -06 is designed to comply with the construction standards of Title 27 by using a composite liner and blanket LCRS. The northern portion of WMU FU -06 overlies the interim final cover for the Existing Austin Road Landfill. The interim final cover for the Existing Austin Road Landfill was constructed in the fall of 2002 and consists of a 2 -ft thick foundation layer, 1 -ft thick clay liner, and 1 -ft thick vegetative layer. The vegetative layer (stripped of vegetation) in combination with the clay liner for the interim final cover will serve as the base liner for WMU FU - 06. A CQA Report for the interim final cover was submitted and approved by the RWQCB (Final Construction Quality Assurance Report for Closure Construction of the Austin Road Portion of the Forward Landfill, Vector Engineering, 2002). Following placement of refuse in the northern portion of WMU FU -06, an interface liner will be placed on the south facing refuse slope. Following the completion of the work for WMU FU -06, the Quality Assurance/ Quality Control (QA/QC) Consultant will prepare a final CQA Report. The CQA Report shall be submitted to the Owner within 20 days of construction completion. The purpose of the CQA Report is to document that the materials and construction processes comply with the WMU FU -06 design and regulatory requirements. As -built drawings and a discussion on the refuse fill stability of WMU FU -06 based on the actual interface shear strength test results obtained during the CQA testing program shall also be included. 1.2 Project Description Lewis Engineering designed WMU FU -06 in accordance with Forward's Waste Discharge Requirements (WDR Order No. R5-2003-0049), as well as applicable state and federal regulations. The provisions of particular importance regarding the design are: The WMU FU -06 lining and leachate collection and removal system (LCRS) design shall conform to construction standards of Title 27 by using a composite liner and blanket LCRS. • WMU FU -06 will be designed, operated, and maintained to prevent inundation, washout, erosion, and slope failure resulting from flooding caused by a 24-hour storm with a 1,000 year return period. Page 1