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� <br /> Oc(obcr 1 l, 201 I <br /> 19r. I Ian�c��Jubic <br /> L�A Job No. 11-0G4 <br /> I'agc 6 <br /> subjcct residcncc sitc arc of lugh shcar strcngdt :+nd havc cxccllcttt resisi.vicc agauut soil <br /> mo�'ement und slope tailure. Although the slope borJering �he west side of the subjcct sitc <br /> stands at an inclinatiun ovcr 40 percrnt�vitl� a��crtical rclicf of about �0 to 35 feet, the core of the <br /> slupe is i'omied witli thc densc smi� and hard silt soils. 1'hcrefotc, it �vould be unlikely for deep- <br /> seated landslides cutting i�iro dicse widcdying competent soils to occur on the site and, thcrcforc, <br /> the lundslide h�ard for thc subject site should be minim:d. <br /> Lrosiun Harard <br /> 'Chc surFicial topsoil and the ���cathcrcd �oil in thc root zone dr�ping ovcr [hc stcep slope tlankin�. <br /> the west side of thc subject residence site maJ' bc eroded if they ure de��oid of vegetation co��er <br /> ,md o�erly saturatcd. There is a remote cha�icc that pro�Ressi�'e erosion m�y resull in shallo��•. <br /> skin-t��pe mudflo�vs on tlie steep slope. To mitigule such har.ard,the ��cgetation co�•er outsidc of <br /> construction limits should be preserved und m�intaii�ed, a�id concentra�ed stonuu'�ter should not <br /> be discharecd miconlrc�lled onto tlie steep slope or �nywhere ��'iduu tlie site. Storn� runoff over <br /> impervious surfaccs, such us roofs and pavcd dri�c���ay should '.�e cxptured �vidi underbround <br /> drain line systems ticd to roof do��nspouts und b�� catcli basius inst�lled in paved dri��c��•a}'. <br /> \Vuter collected into dicsc widergrounJ drain lincs sliould bc tightluied tu discharge into a ncazby <br /> storni sc��•cr. 1 azd �vaste and spoil soils should not disposed uf unto the stccp slopa Cxposed <br /> unpnved uround resulted froni construction a�ti�ities should he re-vegetflted as soun as possible. <br /> if the ahi�vc rccunmiaidutions ure imP�emented and obscn�cd during �uid uRer construction, tlu <br /> crosion hazard of thc sitc should be minimal. <br /> Seismic llazard <br /> Th� Yuget Sound region is in un acti�e seismic zone. "Chc subject site is underlain at shallo�v <br /> depth b; densc si�t)' finc sand and hlyd flne saindy silt soils of high shcar strcngili. Tlicre is u luck <br /> LiU & ASSOCIATES, LNC. <br /> ����� �l <br />