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File No. 20-1008-49 KLEINFELDER <br /> December 22, 1994 <br /> permeabilities give similar measurements, we therefore conclude that the laboratory <br /> permeabilities provide a direct indication of actual field permeabilities. <br /> Based on our observations and testing results, it is our professional opinion that the barrier and <br /> foundation layers were constructed in accordance with the revised CQA plan. Compaction <br /> curves, gradation, hydrometer analysis, and Atterberg Limits (when applicable), were all <br /> similar to those performed on test pad materials. Most importantly, laboratory permeability <br /> tests on the barrier layer indicated that the native soil, Ione clay mixture, has a permeability <br /> of less than 10' cm/sec. Because laboratory testing indicated final cover soil properties are <br /> similar to test pad characteristics, it follows that barrier layer field permeability meets the 101 <br /> cm/sec requirement. <br /> CERTTHICATION <br /> This report was prepared under the direction of the undersigned and contains the CQA <br /> performed during the closure of Harney Lane Sanitary Landfill. Kleinfelder certifies that the <br /> CQA Plan was implemented as proposed and that the construction proceeded in accordance <br /> with design criteria, plans, and specifications. The term certification is used herein as defined <br /> by Section 8770.6 of the California Business and Professions Code. Kleinfelder performed its <br /> services in accordance with the standards that existed in San Joaquin County at the time this <br /> report was prepared. <br /> Copyright 1994 Kleinfelder,Inc. Page 12 of 12 <br />