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• Geomembrane puncture protection <br />—Check of the puncture protection of existing geomembranes in Modules 1, 3, <br />and 4 <br />—Puncture protection calculations for geomembranes to be used in the future <br />modules assuming the use of rounded/subrounded gravel for drainage layer <br />—Puncture protection calculations for geomembranes to be used in the future <br />modules assuming the use of crushed gravel for drainage layer <br />As part of the seismic slope stability work, Shaw subcontracted with Dr. Norman <br />_ Abrahamson to update his previous (Abrahamson, 1994) seismic hazard evaluation for <br />the NCRC&SL site. Dr. Abrahamson is an internationally recognized engineering <br />seismologist who has done pioneering work on ground motion attenuation relationships. <br />El <br />Geotechnical Analyses for NCRCSL <br />Shaw Environmental, Inc. <br />1-2 <br />Department of Public Works/Solid Waste <br />County of San Joaquin, December 12, 2007 <br />