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LS! Arlrtpl <br />Pill Con�cnr. Suils uscd for stnwtural fill should noi contain individual paiiicics grcatcr tl�nn about G <br />inchcs in di:unetcr and shoidJ bc li'ec of organics, debris, and olhcr dcicterious malcrials. Given Ilicsc <br />prerequixites, Ihe suilahility of soils used for s�nictural lill dcpcnds primarily on lhc grain-sizc distribulion <br />and moisturc conlcnt of Ihc soils �vhcn ihcy ;uc placcd. Nhcn Ihe "lines" conleni (Ihal soil friction <br />passing tlie U.S. No. 200 Sicve) incrcases, sniL becomc more sensitive �o xmali chunges in moisture <br />conlenl. ,l'pils conlaining more Ihan aboul 5 percent fines (hy rvei�hQ cannm he caisistently crnnpacted <br />lo a firm, unyiciding condilion u�hcn thc moi::tu e contenl is more lhnn aboul 2 peiccninge puinls above <br />optimum. The cxisting surficial soils at ihi:; sitc cnnsist of gravcl surfncc o��crinying loosc snnds. 'fhc <br />near sur�hce granuim' site snils above the sill dcposils should bc considcrcd modcratcly moisture sensili��c. <br />'I'he usc oP "clean" soil is necessnq� for fill placcmcnt during ���et-weatlur sile work, or if' the in•situ <br />muisture conlent of Ihe sile soils is wu high to allo��� adequnle compaclion. Clean soils are defined ns <br />grnnular soils thnl havc o fiucs contcul of Icss tlian 5 perccnt (by �vcight} bnsed on �he soil frnction <br />passing thc U.S. No3/4-inch Sicvc. <br />CLOSUItli <br />Thc conclusions and recommenda�ions prescnled in Ih,is repuii �ue based, in part, on tlic exploralions Ihal <br />�vc perfomied f'or Ihis sludy. If variations in subsurlace conditions are discovered during carlh���ork, wc <br />mnp nccd to inndify this repnrt. 'fhc fuhue performance and intcgrity of Ihc to�vcr foundalions �vill <br />depend 12rgely on proper ini�ial site prcp�u:rtion, drtiinabe, and construc�ion procedures. A7oniioring 6y <br />e�perienced geolechnical peisonnel should be considered au imegrnl part of the consmiction process. V1'e <br />arc :+vailablc to provide gcolcchnic;d enginecriug sen�ices during Ihe entlhwork and fimndalim� <br />construction phascs of ;hc projecL 11'v.irinlions in thc subgrndc cundilions nrc ubscrvcd al Ihal lintc, wc <br />��-ould hc ahlc lo providc addilion:d gcotcchnical rcconuncndxtiuus, thus minimizing dclays :is the prujccl <br />dcvclops. �i'c arc also ;roailahlc to rcvic�v prclimiu�ny plxns and spcciticutions hcfi�rc consh'uction <br />begins, and to pro��ide eeotechuicnl inspection and testing scrvices dw�ing consuiiciion. <br />Vciiinn \1'irclas .qngusl-0.?OOJ <br />Addp� 1'rul<<'I \u. l\7\II]�4777 Pagc 10 3 <br />�� <br />