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., <br />' • January 22. 20U3 � • .•,. . <br />. Hb'A Project No. 200�-ISS . <br />' <br />,' <br />I.I <br />1 <br />FIELD AND L:\I30RA'i'UR1' IN\'1',Sll(;:\l'IONS <br />r��;►.0 iNVH:s r�cA7'ION <br />A supplcmcnt�d gcotcchnical subsuti'acc cxpluratiun prugram �cas conductcd by Ii1VA on <br />December 3O, 2002. The ficld investigalion cunsislcd ofdtilling and samplin� hco <br />borcholes (l3F1-1 and [3H-Z) al selected locations in lhe � iciniry i�f lhe propused building <br />fouti�rint. Thc exploration locations �acrc IacatcJ in thc licld by l.�ping distamccs tiom <br />stakes nl proposed bui;ding corners und pluttcJ on thc Sitc and Lxpluration Plan <br />(Figure 2). A legend to thc lenns and symbols , ittd un thc hurin� logs is presented on <br />Figure 5. Logs of the borings arc presented un I�i��ures (i and 7. <br />The borelioles were drilled by liulocenc Drilling. Inc. o( filc. 1Vashington. un�lcr <br />suUcontract lu IIWA. Drilling was perlin7ncil ��ilh a truck-uwunlcd. �iobilc l3-GI, drill <br />ri� advancin� 4.25-inch inside diamctcr (ID). cuntiuuuus-Ili��h�, hullo���-slcm au�crs. Thc <br />borings �acre �dvanccd to dcpilis ol'S3S anJ �-1 Iccl. ll��un c�,mplction uf drilling. <br />borehole BI1-I was abandoned with bentunite chips. A picrnmeter. prolected ���ith a <br />11ush-mountcd monumcnt, �vas instcdlcd in L31I-? lu a dcpth ul� �0 IccL Thc pirromcl4r <br />consistcd of I-inch dinmctcr, thrcadcd I'VC pipc, sluucd liom 10 tu 30 tcct. <br />Soil samples �vere collecled at Z'/• to �-li�ot inten�als usin_L' SlanJard Penetration'I'cst <br />(SPT) samplin�; in gcncral accurdancc �vith AS"I'�4 D-I>SG. SP'I'santpling �eas <br />perfomied using a 2-inch outsidc diatnctcr. split-spoun, samplrr drivcn with a st,mdard <br />140-pound hammcr. Thc drill rig �cas cyuippcd with an autunuitic trip hammcr for <br />perfomiing Standard Pcnctration Tcsts. During thc lcst, a samplc is obtaincd by driving <br />the samplcr I S inchcs inlo thc soil �vilh the hammcr I�rccJalling 30 inches per suvke. <br />Thc numbcr of bluws rcquircJ f'or cach G indics oFpcnclratiun is rccord�J. "I�hc Slandard <br />Penclration Resistance ("N-valuc") of the soil is calcidated as thc numbcr of blu�cs <br />required for the Gnal 12 inches of penetration. I f a tolal of i0 blu���s are rcconled �cithin <br />a singlc 6-inch intcrvul, thc lcst is tcrminatcd, and thc blo��• cuunl is rccordcd as �0 blo���s <br />for the numbcr of inches of penctratiun achievcd. "I�his rcsistance, ur N-valuc, prervides <br />an indication of lhc relalivc dcnsity of granular soils and lhc rclativc consistcncy ul' <br />cohcsive suils. <br />"1'he borings �vcre advanced undcr thc lull-tinm obscnmlion of an 11\V�\ engincering <br />:' 1. <br />gcologisL Suil sumplcs obtaincd li�om thc burings wcr� classilicd in the licld and <br />rcpresentative porlions wcre placcd in plastic bags. Thcsc soil samples ���ere thcn _ <br />.' returned to our laboralory f'or 1'wlher examination and testing. Pertinent inlonnation <br />including soil sample Jcplhs, stratigraphy, soil cnginccring charactcristics, and ground <br />water occuirence was recardcd. The sU•atigraphic contacts shoa�n on lhe individual ;ugs <br />represent thc approximale boundaries betwccn suil typcs; aclual transitions may be more <br />�' gradual. "rhe soil and growul �vatcr conditions dcpicicd arc ouly fur thc spccitic datcs <br />200?-IRi Suppl I.R.doc <br />H1VA Ciet�$ciencos Ine. <br />� <br />