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� <br />� <br />, , .,�., , � <br />,:�_.=,.':i.0i:�.'•.^.ILS_,� �.i'�C. <br />Advancc ouhvash is thc piimary walcr-bcaring laycr encountcrcd in thc Uorings. This unit is <br />� under confining pressure as indicatcd by groundwater levels measumd in thc �vells are above the <br />overlying glacial till deposit contacL In gencral, this laycr is about 5 to 25 feet thick and is about <br />� 20 to 35 fect bclow thc ground sw�face across the proposed garage footprint. Thc advancc <br />outwash laycr appcars to bc only 5 to 10 fcet thick ncar Oakes Avenuc. <br />� 10.0 TNGINGGRING CONCLUSIONS AND RECOn111I'sNDA7'IONS <br />r10.1 Cencral <br />� <br />'fhis rcport prescnts Administration Garagc and pcdcstri�in tunnel rccommendations re�ardine: <br />� Scismic design critcria <br />� Garthquakc-induccd gcologic har.ards <br />� �ooting foundations <br />� Latcral caith pressures and rrsisuincc <br />� Ploor slabs <br />� Temporary excaeation shorim� <br />� Temporary cut slopcs <br />� Potentially contamin:ucd soil c�c:n ation <br />� Temporary dc�vatcring <br />� Potentially contaminated ground���:uer collectiun, trcaunent, and disposal <br />� Pcrmancnt drainagc <br />� Pill placcmcnt and comp:iction <br />� As indicatcd in ihc list abovc, in addition to our gcotcchnical rccommendations, �cc :irc also <br />pru��iding conclusions and conccptual rccommcnd:uions regarding soil cxcavation :md <br />ground�vatcr collcction .md u'caUncnt for potcnti:il ronuimination at thc sitc, hascd on <br />� <br />�I <br />�� <br />� <br />infonnation wc ha��c at thc timc of this �critin��. <br />10.2 Scismic Uesign Consicicrations <br />Thc projcct is locatcd in a modcratcly acti��c scismic rccion. Nhilc thc rcgion has histonc�lly <br />cxpericnced moderute to large earthqunkes (such ns the April 13, 1949, magniWde 7.1 Olympia <br />Garthquakc; April 29, 1965, magnitudc G.5 5cattlo-Tacoma Garthquake; and FcUruary 2S, 2001. <br />magniwdc G.S Nisqually G:vthquakc) geologic evidencc suggests that larger carthquakes h,«�c <br />occurred in the recent past and ���ill contin�e to occur in ihe futurc (for example, maeniwde S'/z <br />to 9 C:�scadia Suhduction "I_onc Intciplatc cvcnts, magnitudc 7�/•_ Scatdc 1=;�ult evcnts). �1'c <br />undcrslan�l that Ihc �irujcct �� ill hc �Icsi�,ncd in ;iccord.mcc with thc l9)7 Unifunn Buildin�, Codc <br />_i.i.n��,iaa�s.au„i u,i 21-I-09G4d-005 <br />q <br />