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Geosyntec o <br />CONSTRUCTION MEMORANDUM <br />ExpansionArea 2A <br />Uoothill Sanitary Landfill <br />TO: Taj Bahadori (San Joaquin County) <br />FROM: Fabrizio Settepani (Geosyntec Consultants, Inc.) <br />Krzysztof Jesionek (Geosyntec Consultants, Inc.) <br />DATE: 21 July 2015 <br />COPY TO: Awni Taha (San Joaquin County) <br />Michael Raub (Advanced Earth Sciences, Inc.) <br />SUBJECT: Geomembrane to Geocomposite Interface Shear Strength at Normal Stresses of <br />1,000 psf and 4,000 psf <br />Based on the interface shear strength conformance test results, Advanced Earth Sciences, Inc. <br />(AES) has advised San Joaquin County that the minimum specified post -peak strength for the <br />geomembrane to geocomposite (GM/GC) interface was not met at normal stresses of 1,000 and <br />4,000 psf. <br />The measured post -peak strengths at normal stresses of 1,000 and 4,000 psf for the GM/GC <br />interface do not impact the slope stability results for the grading plan presented in the Area 2A <br />Expansion Design Report prepared by Geosyntec Consultants, Inc. t <br />All work performed as part of this construction shall meet the requirements of the project <br />construction drawings and specifications, as modified by relevant construction memoranda. <br />Geosyntec Consultants, Inc., "Design Report, Area 2A Expansion, Foothill Sanitary Landfill, Linden, California, " <br />5 October 2014. <br />P\SJC\1780\Task 6\CM\CM#3 (GWGC Interface) engineers I scientists I innovators <br />