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-i OF CALIFORNIA•ENVIRONMENTAL PROTECTION AGE:JC'( PETE VN <br /> LSON,Govemor <br /> _iFOR141A REGIONAL WATER, LJALITY CONTROL BOARD - <br /> .LNFFF AL VALLEY REGION <br /> ROUTIER ROAD,SUITE A _ <br /> ZAMENTO, CA 95827-3098 !D <br /> G N E:(916) 255-3000 L' ",y�, 1 V E D <br /> (916)255-3015 <br /> i 9: 35 <br /> -J. CO. PUELIC <br /> 18 October 1993 <br /> Mr. Gabriel Karam <br /> Department of Public Works <br /> County of San Joaquin <br /> 1810 E. Hazelton Avenue <br /> Stockton, CA 95201 <br /> TEST PAD CQA RESULTS, HA.RNEY LANE SANITARY LANDFILL, SAN JOAQUIX COUNTY <br /> (CASE# 2598) _. . <br /> We have reviewed the technical report titled "Summary of Test Pad-Results" for San Joaquin <br /> County's (County) Harney Lane Sanitary Landfill prepared by'Kleinfelder,. Inc. <br /> Section 2541 of California Code of Regulations, Title 23, Chapter 45 (Chapter 15) requires.that the <br /> construction methods and materials that are used during actual,•construction'of'a low permeability.. <br /> clay liner (final cover) be field tested to ensure that the performance requirements be met. <br /> Section 2541 of Chapter 15 also requires that the construction;material•have at-,least 30%, by weight, <br /> pass a No. 200 sieve and be classified as SC, CL, CH under the Uniform Soil Classification system. <br /> A test pad can be used to demonstrate that construction material and procedures to be used in the <br /> actual final cover will meet Chapter 15 requirements. The County.constructed a test-pad to <br /> demonstrate that the proposed materials and procedures would meet Chapter 15 requirements. x <br /> Kleinfelder was hired to conduct the quality assurance and quality control Itests to verify that the test` <br /> pad was constructed properly and that results from the test pad construction could be used to <br /> construct the final cover. <br /> The Kleinfelder report presented results of laboratory and field tests which indicate the following: <br /> 1. Based on information presented in the report, it appears that the initial foundation <br /> laver compaction did not meet the required construction standards specified in the <br /> CQA workplan. <br /> 2. The SM material appears to have been difficult to compact to the specified relative <br /> compaction. <br /> 3. None of the construction material was classified as SC, CL, or CH. Only the ML and <br /> ML/Ione clay mixture had greater than 30% passing, by weight, the No. 200 sieve. <br />