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AuE� usl I R, 2004 <br />Mr. Jim Thomas <br />Dclvedcrc Lots 3Z and 33 <br />LR•.n Job Nn. 4AOR8 <br />f''ier R <br />shalluw Jrpths arc uf nwdcralcly-high to fiigh st:car strenglh, and should make it unlikel} ti�r soii <br />laleral sprcading anJ liquefaclion lo uceur on thc site. lhereforc, seismic hazard for the sitc <br />sho�.ilJ also be minimal. The residences lo bc constructed on the lots, howcver, shoulJ bc <br />designed lor seismic lorces induced on thc struclure by strong carthquakes. (3�ised on the soil <br />da;a obtaineJ from Ihe test pits, Ihe Soil Profilc Type at t�ie sile underlain by medium-dense to <br />densc advance owwash sand should be classified as 5,,, in accord:utce wilh thc 1997 UDC codr. <br />SITG PRGf AKATION AND CGNGRAL CRADINC <br />Silc pn.paratiun should ;ncludc cicaring and grubbing wi�hin construc�ion limi�s. Lousc lil!, <br />topsoil, soft silt :nd wcak soils in tlic root wnc should bc compktcly strippcd �ailhin the <br />Jriveways and huilding pads. This may require overvexcavation of 7A fcct in some areas within <br />Ihc ridgc shclf of ihc lol;. Thc cxposcd surfacc should bc compacicd io a non-yiclJing sl:uc �vith <br />a vibratory roller compactor and proul=rollcd with thc earthwork equirment operated on sile. <br />I hc un-siie surlicial soils con�ain a high percenlage of fines and arc srusitive lo moislure. A <br />laycr ol dcan yuarry spalls should bc placcd ovcr cxcavatcd arcas and arcas of freyucnl lr:dfic, as <br />reyuircd, tu prolcct Uic subgradc soils from disturbancc by conslruclion IralTic. 3ilt fcnccs <br />tihould bc crectcJ alung thc downslupc boundarics of thc ridgc sliclf arca to prevcnt scdimcnts <br />bcing Uansporicd onlo thc stccp slo�ic ur a�ljaccnt propertics or thc strcct. <br />4:XCAVA"I'ION ANU I�fLL tiLOPi�:ti <br />Undcr no cireumslnncc should cxcavation slopcs bc grcatcr than thc limits sper.ified by lucal. <br />state and fcdcr.il s:ifcly rcgulatiuns if workcrs havc to perli�rm construction work in c.�cavatcd <br />areas. Unsupported tempurary cuts greater Ihan 4 Iect in height should not be slceper lhan <br />I I I:I V in ih�� wrficial lill ur s�;il silt or Ihe undcrlying Gsperance Sand deposits Permancnl cut <br />LIU & ASSOCIA�'CS, INC. � •� � <br />%�✓� _ <br />