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e <br />Junc 28, 20G <br />David and ]udy King <br />L&A Job No. 6A076 <br />Pagc l 1 <br />than I'our inchcs. Imported swctural fill should be stockpiled and covcrcd separatcly from the <br />��n-site soils. <br />Structural fill s6ould be placed in li(is no morc than 10 inches lhick in loose smtc, with each liti <br />compacted ro a minimum perccntage oCthe maximum dry density determincd by ASTM D1557 <br />(MoJificd Proctor Mcthod) .w5 follows: <br />ApPlicatiun <br />Within builJing pads <br />Roadway/dri��cwny subgradc <br />Rctnining wall backfill <br />Utility trench hacklill <br />13UILDING SF.TI3ACK <br />% of Maximum Dry Density <br />95°�0 <br />95% for top 3 fect and 90% bclow <br />90% <br />95% for top 4 fecl and 90% bclow <br />Thc purpose of building sctback from the top or toe or an overly steep portion of a slope is to <br />cstnblish n safe buflcr such th�t if a slo� f�ilure should occur the smbility of the structurc can be <br />maintained :uid damages to the strucwre minimizcd. '1'o maintain stnbility, lhe building to be <br />constnictcd on thc northcm lot should bc suf7icicntly sclback from lhc top of bank of slope 40% <br />or morc. Our rccommendations for building sctback of the proposcd new residcncc from the top <br />of stccp slopc arc prescntcd on Plate 7. If comentional Cooting foundations nre used to support <br />the building, thc footing foundations should be cmbedded nt least one foot into the undedying, <br />Jcnse I;sperancc Ssmd ancllor hard Whidbey fonnation soils. Also, lhe footing founclntions <br />should be set back at Icast I S feet from rop of bank of slope 40% or more, und the horiwntnl <br />distance from the cdge of the footings to the face of Uie stecp slope should be at least 20 feet. <br />LIU & ASSOCIATES, INC. <br />