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r <br />' i <br />Gcotechnicnl Lngineering Evaluation <br />i303 Medrona Avc - King <br />DeeemUer 2, 200! <br />I'cMt Pilc No. 39346 <br />Pngc 4 <br />G�OLOGIC IIA%ARllS <br />i:rosion Flazard <br />The crosion hn7ard criteria used for detcrmination of affected arens inctudc soil type, slope gradicnt, <br />vegetation cover and ground watcr conditions. The crosion sensitivity is related to vegctative cover nnd <br />thc specific surface soil types (group cllssification), which are related to the underiying geologic soil <br />uni(s.'Phe erosion hazard for thesc soils forn�ing the upper slope is listed as bcing high when stripped of <br />vegetntion. <br />The proposed sitc impmvemen�s shoutd mvnlve no disturbnncc of soils on ihc steep slope. 9'he potential <br />for erosion may be reduced by maintaining vegetation on the slopes anC by conlrolling surface wnter. <br />The proposed improvemcnt's potcntial for incrcasing the crosion hazard on thc slopc can bc furllier <br />limited by revegelation ol are.ws of soil disWrbed by construction as soon ais practical. <br />Scismic Hazard <br />The Site Clnss is C ns sl�own in "Cnble 1615. i.l of the 2003 International l3uilding Code (IIIC). <br />Haz�rds associatcd with scismic activity include (iqueCaction potentinl und reduction of slope stnbility. <br />Liqucfaction is cnused by n rise in pore pressures in n loosc sand dcposit. Thc very dense soils thnt are <br />interpreted !o core lhese slupes have a low potential for liqucfnetion. A reduction in slope stabiliry may <br />develop during episodes of strong ground motion. Should there be a reduction in slope stability, wc <br />expect fuilure wuuld occur mainly in tLc loose surficinl soils on ihe slope. <br />CONCLUSIONS ANll I2�CODiNI�NDATIONS <br />Gencrnl <br />It is our opinion thnt thc sitc is cmnpatiblc, from a gcotechnicnl cnginecring standpoint, with tlie <br />proposcd dcvclopmcnL Tlic undcrlying deposits on the lot and in thc slope on which Uic house will bc <br />built typicnlly h:n�e high strength and nre considered stable with regnrd to decp-seated enrth ntot�cntent. <br />RM! ASSOCIATES LLC <br />9'd 65I3-6d9 (09E1 szoaztyo�y �N su�isaQ d9S�E0 LO 6D JeW <br />