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2100 Maiu Stm%' mite 154 <br />iitmu � Beach; califtv;ft 926A8 • USA <br />CNsvi'i14rrTs 3e1. {!lb) 969-0800 • Fax473e�) g{,9-fl82® <br />22 ja uary 2001 <br />Dr. Hari Shauna, P.E., GE* <br />Principal <br />GeoSyntec Consultants <br />150014ew'etl Avenue, Suite 804 <br />Walnut Creek, California 94596 <br />Subject: Seismic SiteExposwe Evaluation and <br />Seiectio�lof Design Cnound Motions <br />Forward Landfill, Sen Joaquin County, California <br />IN-MODUCTION <br />Olt esents the seismic <br />site exposlae evaluation for the Forward <br />This letter rep la ,California, by the GeoSYat� C�onsultarats {SYs'etc} . <br />Landfill Ile <br />in San Joaquin C rY ®sure evaluation consists of evaluation <br />Humingtoan Beach office. This seismc site exg opding desil� 9r°U <br />of the seismic'b for the site and developmwt of cortesp <br />Motions. The results of the seismic site exposure evaluation indicate thel the M� <br />otzon rude a)6.4 .event on <br />Probable Earthquake (1'+�'E) at the site is either a Mament �$ uthwest ®f the <br />the Great valley bliud thnlst system approxttnately wtdrh 2 <br />l <br />roximately 74 mites <br />site or a M� 7.9 event on the San Andreas fa ltofftthe seismicsite er-posure' evaluatipn <br />{11� 1on} southwest of the site. The resultsCE at the site is either a <br />Maxim= Credible Earthquake (MCE) a M, 7.9 <br />fvr$1es indicate that the on the Great Valley blind thrust syswrn or <br />Moanent Magnitude ( 6.1 evezrt <br />event on the San Andreas <br />fault systeta. <br />vAth two sets <br />CeoS ten ' ed both fire WE and MCE for the peak horizontal <br />Of represeatatiVe rncrtion <br />etets. Each set consists P <br />otbatical bedrock outccr►p at the geometric center of rile site <br />ground acceleration in a hyp and a target dWA3i,on of strong ground <br />1roUnA), a cargo aeceleratiom reponse spec candidate MP.E (MCE) events considered. The exPacted median free -field <br />sha�g for <br />p.upx32tcswPwhnCAUF WcuroRWApMf lt-RAZDOC <br />�•d 9f��1.-109-OiS 2uiJ6auz2u3 szmal WUZU:01 T®OZ ST Few <br />5T/Z0 39Vd S31tI30SSV DI90-1039 Z6L3636606 cO:ZT T00Z/Tc/L0 <br />