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1.0 INTRODUCTION A Quality Assurance (QA) program consists of selected testing and inspection of the final product completed in order to provide the Owner/Agencies an evaluation of whether the end product is of the specified quality of materials and workmanship. Since in earthwork construction it is both inefficient and impractical to withhold QA testing until completion of work, an on-going QA program is typically conducted during construction to ascertain the quality of the end product. Because of possible conflicts of interest, the Contractor should not undertake the QA function directly. Rather, QA inspection and testing should be left under the objective authority of a single team of design and inspection professionals. A Quality Control (QC) program consists of selected tests and inspections during production which can assist the Contractor in producing the quality product that is required. While the QC function is the sole responsibility of the Contractor, the Project Manager may, at his discretion, provide information regarding the on-going QA monitoring for the Contractor's use in implementing his QC function. Release of the QA data to the Contractor would be for - convenience only and would, in no way, relieve the Contractor from sole responsibility for fulfilling the project requirements. AOL This document presents the Construction Quality Assurnace (CQA) plan and requirements for construction of the earthwork portion of the alternative final cover improvements for the Forward Sanitary Landfill (FSL) in San Joaquin County, California. This CQA document details the quality assurance tests and procedures to be implemented during construction and will be used in conjunction with the Project Drawings and Specifications. Closure improvements might also include construction of various drainage structures including storm drain pipes, concrete and/or shotcrete drainage courses, grouted rip -rap and down drains, though these components are not addressed in this earthworks CQA Plan. 1.2 PROJECT REQUIREMENTS As currently proposed, the project will consist of the preparation and compaction of existing foundation layer/interim fill soils and placement of additional borrow soils to achieve a minimum four -foot thick monolithic engineered fill compacted to a minimum of 90 percent of the maximum dry density and exhibiting a maximum as -built saturated hydraulic conductivity of 1.0 X10-6 centimeters per second (cm/sec). Since the engineered fill will be constructed in horizontal lifts, each layer or lift of compacted fill should be tested for compliance with the design specifications prior to construction of successive or overlying layers. All engineered fill and geosynthetic materials used for final cover construction must meet or exceed the criteria indicated in the Project Drawings and Specifications. Any deviation from the Specifications must be pre -approved by the Geotechnical Consultant and/or Engineer. Geologic Associates