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Geotechnical Engineering Ev� tion <br />4708 Seahurst Avenue--Cartcr <br />September 17, 20�6 <br />RMI File No. 37106 <br />Pagc 2 <br />3. I`rovidc rccommcndations for stripping and grading. huilding selbacks, foundation <br />placcmcnt a�d carthwork. <br />4. Providc a gcotechnical rcport discussing our findings, opinions and recommendations for <br />thc planncd consiniction as applicahic lo ihis project. <br />F.XISTING CONDITIONS <br />Gcncral <br />Wc revicwcd thc �cncral gcoiogic and slupc siahilily condi�iuns of Ihc sitc. �chich are shown on Ihc <br />Gcologic M.�� �,r s��r��:,i u�r�,s��s ��, �i,� tir�ulc 30- by GO- minulc Oundranglc. \Yashington b�• Yount. <br />Jamcs C. ct al (USGS, 1993). 'I�hc silc arca, slupc ���ri�, �n��rv�� conditions, existing fcamrcs, and <br />proposcd building addition are shown on �hc cnduscJ tiilc Plan Q�igurc 2) or Sclumatic Cross-Scction <br />A-A' (Pigurc 3). <br />Surfacc Conditions <br />'Thc addition is planned for thc north side of thc exisling homc and in the arca of thc existing garegc. It <br />will be at tlic top of thc stcep slopc. 71ic cxisting lawn slopes doµm al bchvecn 7 and 9 dcgrees ro thc top <br />of Ilic slope. At lhis location therc are slairs Icading down Io a(lul arca lliat is up to 24 fcet widc. Hcrc <br />tl�c bluff slopcs Jown at about 30 dcgrecs and is aboul 10 fect high. South of this location ihe blufislopcs <br />a( bchvicen 30 and 39 degrecs and is sevcral hundred icet high. T'hcre is no construction planned in ihis <br />aren.'1'he gcneral site condilions, slope gcometry. and our imerprctalion of existing conditions within this <br />aroa are sho�cn on Ihe enclosed Si1e Plan in Pigure 2 and the Schematic Cross-Sc,lion in Pigure 3. The <br />Cross-Scclion was conswcicd fr�m mcasurcmcnts takcn on thc sitc ��•ith a digilal Icvcl and a tapc. <br />I3ascd on c�posurcs lhc onsitc soils ��crc classificd as thc Vashon till. <br />The arca betwccn thc home and the top ot Ihc hlu(T is in lawn �� ith se��eral birches bctwcen the home and <br />thc blulTwhcrc thc blufiis liighcr. On Ihis highcr blulTthcrc arc blackbcrrics and shrubs for about 50 fcct <br />�rith ccdars and coni�crs on thc portiun '�cL,��. 'I'hcrc arc no sigm of dccp-scated failurc� ai this and <br />aJjuining properlic5. <br />RM/ ASSOCIATES LLC 2I/� <br />�I <br />