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r: <br />SLOPE • ANALYSIS FOR• • <br />As noted in Section 2.2.2, Shaw subcontracted with Dr. Norman Abrahamson to update <br />the previous seismic hazard report (Abrahamson, 1994). The updated MPE hazard report <br />for the NCRC&SL site is included in Attachment C (Abrahamson, 2007). The report <br />provides the magnitudes of MPEs and corresponding PGA values for the most critical <br />faults that may impact this site. Table 2 provides a summary of the faults that may <br />impact the site and the corresponding MPE and PGA values. <br />Dr. Abrahamson identified that the Central Valley Coast Range (CRCV) Fault controls <br />the MPE ground motions at this site for spectral periods less than approximately 0.4 <br />seconds. For spectral periods greater than 0.4 seconds, the larger and more distant San <br />Andreas Fault controls the MPE ground motions. The estimated PGA values for the <br />MPEs along the CRCV and San Andreas Faults are 0.098g and 0.085g, respectively. <br />Dr. Abrahamson also provided two spectrum -compatible acceleration time histories, one <br />for the MPE along the CRCV Fault and the other for the MPE along the San Andreas <br />Fault. <br />Geotechnical Analyses for NCRCSL Department of Public Works/Solid Waste <br />Shaw Environmental, Inc. County of San Joaquin, December 12, 2007 <br />5-1 <br />