CORRESPONDENCE_2008 (7/08 TO 12/08)

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Construction Quality Assurance A) Plan Extension of Closure Cap Corral Hollow Sanitary Landfill August 21,2008 4.0 CONSTRUCT/ON QUAL/TYASSURANCE FOR GEOSYNTHET/CS 4.' Genera/ The objectives of the geosynthetics CQA program are to assure that proper construction techniques and procedures are used and that the project is completed in accordance with the project construction drawings and technical specifications. The intent of the CQA program is to identify and define problems that may occur during construction and to verify that these problems are corrected before construction is complete. This section describes CQA procedures for the installation of geosynthetic components. The following types of geosynthetics will be utilized for this project: ♦ Geosynthetic Clay Liner (GCL) CQA for the geosynthetics installations will be performed to verify that geosynthetics are installed in accordance with the design. Construction must be conducted in accordance with the project construction drawings and specifications. To monitor compliance, the CQA Monitor will (i) review the Contractor's quality control submittals; (ii)perform material conformance testing; (iii)monitor construction testing; and(iv) monitor installations. Conformance testing refers to activities that take place before geosynthetics installation. Construction testing includes activities that occur during geosynthetics installation. All CQA testing will be conducted in accordance with this CQA Plan, and the project construction drawings and specifications. If a discrepancy exists in the testing requirements, the document that requires the most stringent testing will govern. 4.2 Geosynthetic Clay Liner 4.2.1 Manufacturing The GCL Manufacturer will provide the Geosynthetic CQA Consultant with a list of guaranteed "minimum average roll value" properties for the type of GCL to be Vector Engineering, Inc. .143E Spring Hill Drive•Grass Valle CA• 530 272-2448 9 9� p 9 Y, ( ) -21-