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CONCLUSIONS AND RECOMMENDATIONS <br /> EARTH�UAKE ENGINEERING <br /> Gco[nginecrs has cvalu:iteJ Ihe si�c for scismic hazards including liqucfaction, latcral spreading, fault <br /> rupwrc and earihquakc-induccd landsliding. Our evaluation indicates lhut the site docs not ha�c <br /> Iiyucliable soils present and thcrcl'orc also hns no risk of liyucfaction-iuduccd lateral spreading. In <br /> addition tlic sitc has a low risk of fault rupturc and carthqu:ike-induccd landsliding. <br /> For the sile, we recommcnd �he Interna[ional 9uilding Codc (113C) 2G03 parameters for Avcragc Field <br /> Standaru Penetration Resislar�ce, Site Class, short period spectral respunse acccleralion(Ss), I-second <br /> periud spectral respunse accclerution(S�), and Seismic Cocl7icients P�and F,�presenled in Table l. <br /> Tahie 1. 18C Seismic Parameters <br /> 20091BC Parameter Recommended Valu� <br /> Average Field Standard Penelratian Resistance 15 <_ N 5 50 <br /> . .. .. .. _ __ _... _. .. _. ...._____. _ _ .. _..__...__ _____— <br /> Sile Class � <br /> — . ____ _ __ .. . _.. . --___. __..----- --- <br /> Shod Penod Spectral Re:.ponse Acceleralion,Ss(Percent g) 127 <br /> . _ _ ... _ . . .__. . . . _. . . . .._____ --__._ _ <br /> 1-Ser,ond Period Speclral Response Acceleralion,S,(percent g) 68 <br /> . . . _ _ . . ._ _. .. _ . ._ . . . . __-____ i.0 <br /> Seismic Caefficienl,Fa <br /> __._ _. __ . . . .. . _. __.___.. . .___.____. _..._. _—_._—.--- _ <br /> Seismlc Coeffiuenl, Fv 1.57 <br /> EARTHWQRK <br /> ISasecl on our cxpericnce :it lh�: ,iie aud thc suL�urt:iec soil conditions encountered in the borings, we <br /> cxpcct that thc soils at thc sitc may bc cscavated using convcntiunal hcavy duty construction cquipmcnt. <br /> Thc nmterials wc encoi�ntcred generally include dcnse to very dcnse silry sand, and dcnsc to very dense <br /> fiuc W mcdium sand with variablc gr;rvcl. 1'hc nativc glacial deposits may rcquire a largc cscavator to <br /> � accomplish the cxcavations. Glacial deposits in the area commonly contain cobbles and bouldas Uiat <br /> may bc cncuuntcrcd during cxcavation. Accordingly, lhc contractor should be prcpared to dcal with <br /> 6oiddcrs, i f cncountcred. <br /> I'iu glacial till suils contain si6niticant lincs (matcrial passing thu U.S. standard No. 200 sicvc) and will <br /> be highly moisWre-sensitivc and susceptible tu disturbance, cspccially when wet. ldcally, earthwurk <br /> should be undcrtaken during cxtcndcd periods o( dry wcather u-hcn thc surficial suils tvill bc Icss <br /> susccptible to disWrbance an.i provicte bcttcr support fur construction equipme�t. Dry wcather <br /> cunstruction will hclp rcducc catth�cork costs and incrcasc thc potcntial for using thc nativc soils as fill. <br /> 1'rafiir,ibility on lhe sile is no[ expected tu bc difticuh during dry weadrer conditions. F[o�cever, die <br /> native soils will be susceptiblc to disnirbancc I'rom constniction equipment d,iring �vet wcather conditions <br /> ❑nd pumping and rutting of thc exposcd suils tmdcr cquipmcnt loads may occur. <br /> Clearing and Sife Preparation <br /> I'he existing sitc is c;sentially dcvoid o(vegetation and native soil is gcncrally exposcd in mos[ arcas. <br /> Occasional cons�niction debris was obscrved on the surface, which should bc removed from thc site. We <br /> recumnund diat any cxisting Wiliucs loc�icd unu�� thc pruposcd builJing Cootprinl bc removed &om ihc <br /> bailiiinu Ibuiprint and reroiucd i(ntcdcd. <br /> ---�-- --- - - ---- �--- --------------- --- <br /> Pi(.S.� l'ui.�-r,nl.inl Pugc� GKIENGIHEFRS� <br /> /;muan:!5,_UU° <br />