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Gl;�cial ad�';mcc ouhvash dcpositi undcdic the glacial till at thc sitc and may bc 200 ro 300 fcct thick. <br /> :\dcauce oucwash generall� consisting of sand or sand and gravel was mapped outcropping at tlu surface <br /> �o thc cast o(the site and was obscrved u�i tlu western portion of ihe site. Dased on our previous site <br /> �vork. we tound that advancc outwash sand :md gravel soils were exposed in the mine<I pit arca under the <br /> c;�st portion o( the site. The sand and gravel tvas c�cposed in the old pit bottom a� abuut <br /> I?Icvation 380 fcet. <br /> 'I'r.msition.il Dcd dcposits underlic the advancc outwash and may bc about ISU fect thick at tlie site. <br /> fransitiunal 13ed Jepusi�s gener:dly consist of glaciaily consolidated silt and day and are considered an <br /> ayuitard. `,�'c anticip:nc thc upper si�rf,�cc of thu Trausitional f3ed dcposi�s is at about �Icvation I50 to <br /> ?00 (ccl. <br /> SUBSURFACE CONDITIONS <br /> 'I he following subsections describe the general subsur(uce conditionti known at the site based on our <br /> previuus cxpericncc and dic barings perfonned by GNSR Corpor�tion. BNSR drillcd 16 soil borings a[ <br /> tha si[c including cumplctiun of lhrcc munitoring �eclls. l:xploration loc;uions rcfcrenced hcrcin are <br /> :;Iww� in Appcnd�.e ;\ 1 Pigurc 3 prcp�rcd by GNtiR):dong wi�h summ:�ry logs for thc cxpbntions. <br /> Subsur(ace Soils <br /> ;As discusicd �L-o� :, ihc cnxt portiuc of thc sitc is luc;ucd uvcr a previuusly mined sanJ and gravcl pit. <br /> "i'hc pit arca was �illccl with structural lill and�cc obs�rvcd pl:icctncnt and compactiun of thc structural fill <br /> un an intcrmittcnt basis during tLc 2000 �nd 2001 gruding scasons. l I�c stnictural fill placcd bclow thc <br /> huilding sitc is approximatcly 40 fcet ihick in the decper aret�s oCthe pit. All fill pinced as part oCthe <br /> itrading was placcd and compactcd as structural till a�icr thc pit tloor arc�s wcrc propcdy prcpamd for till <br /> plaecment. The �ill was generaliy placcd tvith scrapers and compacted with stecl dntm rollers, a <br /> shceps-fuot roller, and ihe scrupers. Structur�l fill placcd wiihin 3 to � fec[ of finished grade was <br /> cump;uted to a[ Icast 95 perccnt MDD dcicrmined in accordancc with ASTbt D 1557. All stmctural till <br /> pl;�ccd bclow 3 icet from finishcd grudc was alaccd and comp.ictcd [o vt lcast )2 perccnt of thc bfDD. <br /> � SVuctur;il fill placed on the site was primarily derivcd Gom cWs madc on ihc Scaway L�usiness Center <br /> sitc. including thc arca south of tndustry StrecL Pil! soils gencrally consist of glaci;d till compuscd uf <br /> s'�y sand with gravcl and ad��ancc outwash cutnposcd of sand witl�variablc gravel. <br /> 7'hc subsurlace soils across the centnl and west arcas ol tl;c site consis[ of native glaci�l lill anJ advance <br /> uwwash. Stn�ctural fill�vas also placcd in Ihc northwcst arca oF thc sitc. Nc cstimatc thc stnretural f ill to <br /> bc up tu about 10 fcel thick in thc north«cstcrn mca. Thc soil boring logs from HNSR rypically inclicatc <br /> ihat thc struciur:�l fill pl:iccd v ihc sitc i; in o medium dcnsc to dcnsc condition with N-vnlucs�cncr�lly in <br /> thc r:mgc uf�� ;o nccr�q. <br /> Groundwater <br /> Ground�c;ter �r;i. �,Uscrccd in \1\1'-'_ ;m�l \ilV-� di�ring. drillin� at:i dcpth of:�bout 65 fce[and in h(�V-I <br /> a[ n dcpth uf ubuu� 2� fcct Lelo�c thc c.�istinc grom�d ,urGrec. No :dsu anticipalc that pcmltcd <br /> groundwatcr �o�ill hc �rcuunicrcd at thc siic in Inuscr undior morc granul�r soils that may o��erlic dcnsc <br /> elucial till soil:•. <br /> pJ,�,�'„ L'Ul�-i�nl���n Pu�;r! GEOENGINlEIIS� <br /> i„��:,�„��_r, :�m s <br />