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( <br /> Robcr[ Kincaid <br /> June 27, 2007 <br /> Pnge 7 <br /> than 3 percen[ fines (soil finer than the No. 200 mesh sieve) bascd on the fraction smaller <br /> than 3/4 inch.The drainpipe should discharge into tighdines sloped to drain by gravity. Roof <br /> drnins should not be tied ro the footing drainage systems, but should bc detained and <br /> conveycd via a separate tight line to the storm sewcr. <br /> EROSION CONTROL <br /> Thc surficial soils within thc subjcct properry are susccptiblc to potcntial crosion if <br /> disturbed by construction or other activitics. Erosion controls arc thcrefore recommended, <br /> including the proper control of surfacc watcr nmoff,minimizing the timc of exposure in the ' <br /> area strippcd during constniction, and prompt rcvegetation. All stormwatcr runoff frotn <br /> roofs and driveways should bc routed to the sewcr within thc allcy. Stormwater from othcr <br /> impr�vious surF.ices such as decks that cannot be routed to the se�vcr should be disposed of <br /> via dry wclls located at least 10 fect upslopc from thc setback buffcr. Concentrated surface <br /> watcr runoff should not bc permitted to dischar�c onto areas sioping more stecply than 25 <br /> percent. <br /> CLOSURE <br /> Thc scrviccs described in this report were preparcd under thc responsiblc chargc of <br /> Donald W. Tubbs, a gcologist as dcfined by EMC 19.4. Dr. Tubbs undcrstands thc <br /> requiretncnts of the currcnt Gcologically H.v.ardous Areas Chaptcr EMC 1937.OS0 and thc <br /> definitions of the applicable tenns contained within GMC 19.4. Dr. Tubbs personally <br /> perfonned a gcological nssessment,conducted a ficld investigation,and researched historical <br /> records on or in Uie viciniry of the above refcrcnced site. In Dr. TubUs' opinion the scopc <br /> of scrvices completcd for this project is adequate to mcct the requiremcnts of thc Department <br /> oP Planning and Community Dcvclopment. Dr. Tubbs has concluded that, if the <br /> rccommcndations within[his repor[are implementcd, the proposed dcvclopment will avoid <br /> impacts ro thc geoloaically hazcu•dous areas and that no�cologic hazards will result from thc <br /> prosed devclopmcnt eithcr within the site or on :.my adjacent propertics. <br /> This rcp�rt has bccn prcparcd for Robert Kincaid and his agents for use in planning and <br /> dcsign for the proposed devclopmcnt. Descriptions oF subsurface conditions relativc ro <br /> found.�c�on ,��nno��� .uid othcr aspects of thc proposed development are based on surfacc <br /> observations and subsurfacc explorations. Therc arc possiblc variations in subsurface <br /> conditions betwcen thc locations of thc cxplorations and also below the depths explored. <br /> Conditions should bc confirmed by obscrvations in the e..cavations at the time of <br /> constniction. � /u <br /> 1 <br /> 7505 West Lake Sammamish Parkway Northeast Redmond,Washinalon 98052 425-882-4850 www.tUbb3.cum <br />