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August I R, 2004 <br />Mr. Jim �Ihumas <br />13clvcdcrc Lols 32 and 33 <br />L&A Job No. 4AORK <br />r;,�� i i <br />mainlaincd anil damagcs �u thc strucuuc minimizcJ. In gcncral, thc greater Ihr scthack. Ihc <br />lowcr Ihc risk for tl�c slrudure ta suslain damagcs from a slopc lailure. <br />l�o maintain slahilily, Ihc buildings to hc conslrucicd on thc lots should be sulllcicnily sclback <br />Irum the top m' bank of the steep slope 40��. Our r�commendations ibr building setl�ick from <br />this steep slope are prescnled on Plale S. If convenlional fooling foundations are uscd to support <br />the buildings, the fooling loundations should bc cmbedded at least one foot i ito tl;e undcrlyin6, <br />very-stiff to liard �ilt soils and thc unJcrlying very-dense csperancc Sand soils. Also, the footing <br />foundations shoulJ be sct hack at Icas� 25 fcet (�om Ihc !op of the�stecp slope cyual or greater <br />than 40"/o gradc, and thc horizontal dislance from lhe edge of thc footings ro the face uf the steep <br />slopc should bc at leasl 30 feet. <br />l'hc building sctback from thc top oF the stccp slupc cqual or grcatcr than 40°i�, graJc may bc <br />reduced to 10 fect if pilc fi�undations are uscd for supporting the buildings. The piles should bc <br />driven to "rcl'usai" as defincd in this report, and battered piles and/or tieback anchors shuuld be <br />providcd for latcral sup��orts lo thc buildings. A combination of convenlional footing <br />foundalions and pilc foundalions, mceling Ihe above building setback recommendalions may be <br />u�cd to support thc buildings. <br />CONVC.NTIONAL I�OUNDA'1'IONS <br />('onventional fouting fuundations may be used for supporting the proposed buildings. The <br />fuoting foimJations should bc placcd on or in�o ttic imdcrlying, nativc, undisturbed, vcry-slifTlo <br />harJ sill or thc densc lisperance Sand soils. 1Vatcr shoulJ not be allowed to accumulale in <br />�xcavated footing lrenchcs. Uiswrbed suils in fooling trenches or under omgrade slabs/pavement <br />should bc complcicly rcmovcd down lo firm nativc suils or thoroughly re-cornpacicd to a non- <br />yicl�ling st.�tc priur �o pouring concrcte for thc footings. <br />Llil & ASSOCIATCS, INC. <br />