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i <br /> � �Cfil <br /> � � <br /> I 'I�he iopography of thc cas�crn portiun uf�hc lots cousisis of a gcndc slupc from <br /> ihc cdgc of tht sidcw:ilk �o ihc tup of a slupc. 'I hc wcsicrn half of thc propcny <br /> Islopes slecply down lo Ihe wetit loward thc 13urlington Northern Sanla Pe (�NS1�1 <br /> r.iilroaJ tracks at ihc barc of 1hc slopc. This slupc Jcsccnds a� approximalcly� fi0 <br /> to 100 perccnl ovcr Ihc Ilill Icnglh of thc sita Thc cstim;ucJ hcighl of Ihc }lupc is <br /> Iapproximalcly 70 feci. <br /> Vcgclalion in �hc arr.i cnnsists iil I;nen �viihin Ihc yards o(lhc c�is�ing residcnccs <br /> I ;n Ihc inp of Ihc slopc. Iluluw Ihc iup ul Ihc slupc, lor ils lull hci�;hi, thc �ir�•:i is <br /> lica��ily vcgcl;rtcJ wiih bl;ickbcn i�s an�l oihcr wccds. Also incluJcJ in �hc <br /> I vcgct.uion arc large fir trecx and numcrous vine nciplc and alJer. The Irecs on thc <br /> sitc appcar io havc grown slr;iighi, indicaiing th;u nwvcmcnt on ihc slopc has becn <br /> nrni-cxisicnt to minimal. <br /> ISite Evaluation <br /> � Subsur/ace Investigation <br /> On Aucust 6, I�)94, a !�l:A �•�•����• ��• �I ::gi:�__ puG:,,,..:1 :. .,d;.,�rf;�cc <br /> o__...g._. . <br /> inveslig;uion of Ihe site. A limited access auger ndvanced drill rig �vas used to <br /> Jrill two borings to ;i maximum dc�i�h of 2S fcct. 'I'hc horingx wcrc locaicd at <br /> dic north and sowh cnds of ihc prujcct arc;i at dic 1op of Ihc slopc. <br /> 'fhc horings �ecrc ;i�lv;wccd using :i hullow sicm augcr. Uuring Uic drillinl;. <br /> � Slandard Penciraiion Tests(51''Ps) wcre performcJ continuously for ihe top ID <br /> fccl anJ at fivc-foot inlcrv:ilx lor�hc rcmaining dcpili ol Ihe burchula 'I'hc <br /> SPTs u�ilircd a two-inch di,imcicr split spoon samplcr:md :� i ao�������,�i <br /> hammcr. In perfurming thc tcsi, ihc s;unplc tubc is dri��cn I S inchcs ahead of <br /> thc augcr intu tha suil wi�h thc hammcr �ei�h a frec fall ol'3U inchcs. Thc <br /> numbcr of blo�vs roquircd to dri��c thc s:miplc tubc fur cach increnunt of six <br /> inchcs is notcd and thc last t���o incrcmcnls :�rc combincd to r.ikulatc thc <br /> Sl,md;ird Pcnclr;uion Numbcr or "N-V;iluc" for ihc depih from which �hc <br /> samplc is uikcn. This N-�'aluc gi�cs a rcln�i�c dcnsiiy fur granul��r soils :md ❑ <br /> rcla�ive consi��cncy for cohcsivc si�ils <br /> Sec�hc sitc plan (:1ppc�idi.r) for �hc s�,ccilic lo.;ition� i�l�hc burings. <br /> Subsurface Conditions <br /> During ihc invos�ig:uion, four prcduminant soil hurizons wc cncoun�crcd. Up <br /> �u ciohl fcct of fill ��-as di}covcrcd on ihc uurthcrn ponion of thc property at <br /> Uic northwcst curncr o( 191 S Grand Avcnuc. I lo�ce�•cr. Ihc fill was not <br /> cncountcrcd ;U Ihc soutlicrn cnd of thc projal. <br /> �� �� <br /> �.. <br /> ,r <br />