Laserfiche WebLink
GsoSYmmc COWMAN" <br />Dr. Han Sharma, P.E., G.E. <br />22 January 2001 <br />Page 6 <br />to "fill" the envelope between the median and ge perc4mtile response spectra in the <br />period range fmrn approximately 0.08 seconds to 2 seconds, all three accelerograms <br />articular, to r t the lw+'lw 64 WE, the accelerograms were <br />. were scaled up. In p To represent <br />scaled ma PHGA of 0.13 trather than -avraediin MSE PHGA of 0.09 g. <br />the Mw 6.7 MCE, the accelemgraras were scaled to a PHGA of 0.19 g rather than a <br />median MCE PTIGA of, 0.13 g. The accel'esat#an xe?nse spectra of the time Histories <br />selected to' represent the Mw & WE4=Adon the Glut'Vailey blind thrust system are <br />plotted in Figure 2. The acceleration response sPectm of the time histories selected to <br />represent the M,,, 6.4 NTE event on 1&e t' rre2rValley.tt-nd sYstem.are plotted.in <br />Figure 3. <br />The magnitude - 8} synthetic acceleroWam was selected to represent the Mme, <br />7.9 MPEIMCE event on the San Andreas fault. "To contpeamatte 'for a " <br />deficiency and to "fill" the emvelope between the median and "I percentile response <br />spectrain the period a from APPrOxim9cly 0.08 seconds to2seconds, the <br />Magmtude <br />+ s ®c =oelerogremwas scaled to a pHGA of _10 g <br />ralher Om the <br />median WE PHGA of 0.06 g. The acceleration response sp of tine' Magnitude C <br />synthetic acceierogam representing the MPFIMCE M. 7.9 event on, the .San. Andreas <br />fault system is plotted in Figure 4. <br />CONCLUSIONS <br />esents a seismic site sure evaivalion for the Forward <br />This letter report pr �° <br />Landfill in San Joaquin Cou�.y, California In performing this evaluation, seismic <br />sources capable of generating sa mg gmund: motions at, the- site were evaluated based <br />upon the best available inforu�ation on regional seismicity and. seismic geology. the <br />Maximum Credible . *Ihquake (MCE) and Maximum Probable Earthquake (WE) <br />moment magnitudes and site -to -source distance pairs for each of. these seismic sources <br />were established on the basis of published -data. The Peak Horizontal Ground <br />Acceleration (pHGA) and significant duration of strong ground shaking (Dr,) at a <br />hypothetical bedrock outcrop at the geornetric .center of the site was established for each <br />P. tPPLMCAWFWWCWF WVF0RW.lRW0R-HA4D0C <br />9'd 902L-103-019 ;^2uTJe0UT2u3 szmal WdEE:6 TOOZ SI RWW <br />rT iln nn"i CJ IHT1)nCCH ')Tnfnn73n 7r QC -0f. -COC. rn'7T TOn7 ITr/IP <br />