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Junc 28,206 <br />Duvid and Judy King <br />L&A Job No. GA07C <br />Puge S <br />stornnvatcr disposal faciliry as rccommended in this rc�rt. S�mil soils ;uid yardwastc should not <br />bc disposed within thc lot. <br />Scismic llazard <br />The Puget SounJ rcgion is in mi activc scismic zone. The norlhem lot is undedain by dense <br />Esper:uuc Sand and hard WhiJlxy formation soils of moderately-high to high shcar strength. <br />Also, Uierc is a lack ot extensive, static groundwater table at shnllow depth under the lot. <br />Thercfore, thc potcntial for scismic ha�ards, such n5 decp-seated landslides, liquefaction, lateral <br />soil sprcading, to occur on the bt should bc minimal. The ncw rcsidences to be constructed on <br />the site, ho�ecver, should bc designed for seismic forces i� duce. by strong earlhquakes. Baseo <br />on the soil conditions encountcreJ by the icsl pils, it is our cp'nion that Scismic Use Group I and <br />Sitc Class D should bc uscd in thc scismic dcsign of thc proposcJ residcnccs in acwrdancc with <br />thc 2003 lntcrnational f3uilding Codc (II3C). <br />S17'F. PRF.PARAi'ION ANU GF.NERAL GRAUING <br />Sitc prcparation should includc cicaring .uid grubbing within construction limits. �ill, topsoil, <br />and loose Gsperancc Sand soils should hc stripped within the driveway and thc building pad of <br />the pro��scd new residence. 7'he sloExs and benchcs at the souUi end of the northem lot are <br />likcly composcd of loosc fill. Thc cxposed ground surfacc following stripping of lhe surficial <br />unsuitablc soils should bc compactcd to a non-yiclding smte with a vibratory rollcr compactor <br />ancl proof-rollcd wilh thc c:irihwork cquipmcnt opcmtcd on sitc. <br />7�iic omsite surficial soils contain a fair to high percentagc of fines and are sensitive to moisttur. <br />A laycr of cican quarry spalls should bc placcd ovcr cxcavatcd nrcas nnd arcas of frequcnt traflic, <br />.�s rcyuired, to protect the subgrade soils Irom disturbance by consWction tratTic. Silt fences <br />should M: erected along lhe downslope boundaries of the lot to prevent seciiments being <br />transpurtcd unlo adjaccnt propertics or thc strcct. <br />LIU & ASSOCIATES, IIVC. <br />