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April 7, 2005 <br /> Mr. Don Lc��in <br /> L&A Job No. SA037 <br /> Pagc 10 <br /> impact thc stability of thc adjaccnt stccp slope arc cithcr non-cxistcnt or can bc minimired to an <br /> acccptablc Icvcl of risk if thc rccommcndations in this report arc fully implemcnted and <br /> obscrvcd. Thc vcgctation covcr on thc stcep slopc should bc prescrvcd and not to bc disturbcd. <br /> r�rcas dcvoid of vcgctation covcr duc to construction activitics should bc sccdcd and re-vcgctatcd <br /> as soon as possibla Wc undcrstand that grading of building pad and drivcway and building <br /> foolprint excavation for the dcvclepmcnt of thc new residcncc will Uc achicved with <br /> convcntional carthwork equipmcrL If thc rccommendations in this report are followed during <br /> grading work, thc construction mcthod and tcchniquc siiould ha��c littic impact on thc stability of <br /> thc adjacenl steep slopc. Since thc driveway and utility lines will approach the new residcncu <br /> from thc strcct sidc away from lhc adjaccnt slcep slopc, drivcway constniction and utility <br /> installation should also ha��c minimal impact on Ihc stability of thc adjaccnt stcep slopc. <br /> "I'o maintain thc stabiliry of thc adjaccnt stcep slopc, thc ncw residencc should be sufficicntly set <br /> back Irom thc crest of thc slopc of gradicnl d0'% or morc. It is our opinion Ihat if thc nc�v <br /> residcncc is sct back at Icast 15 fcct from thc crest of thc adjaccnt stccp slopc of dU'%� or morc <br /> ��radc, thc nc�� residrncc shoul�l h� nblr to mainiain long-tcrm siabilih�. <br /> 13UII.Ii1NC I�OUNDA'I'IONti <br /> Com�ntional fooling foundations may hc uscd Io support thc proposed nc��� residcncc. Thc <br /> looting foundations should bc cunslnictrd on or into undisturbcd, dcnsc silry finc sand and/or <br /> hard finc sandy silt soils, or on stnictival fill pinccd on thcsc competcnt nativc basal soils. Watcr <br /> should not be allo���cd to accunuilate in c�c.rvated footing trenches. Dishirbcd loose and ovcr- <br /> s:ituratcd soils in tiioting trcnchcs should Uc complcicly rcmo��eJ do���n to finn undistunc�d <br /> nati��c soils and �vatcr should pumpcd dry prior to pouring concrctc for thc footings. <br /> LIU & ASSOCIATES, 1NC. <br /> I � C� l� � <br />