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4 2 Stisinic/lAsuefactian <br /> According to Chapter 19.37.080 in tine City of Everett Municipal Coda: (EMC) <br /> seismic/liquefaction ha?.ttrd areas are defined as follows: <br /> °`a. Those areas mappt:d as scistniclliquefaction hazards per the Danir's and Moore Methodology <br /> for the Inventory,Classification and.Designation of Geologically Hazard6us Areas,City of <br /> Everett,Washington.July 1,1991,or as revised through.best available science. <br /> b. Those areas snapped as high and.moderate to high.Liquefaction susceptibility pn.the <br /> Liquefil0ion Susceptibility Map of Snohoinish County,Washington,Washington State <br /> Department of Natural Resources,Palmer,Stephen,et at.,September,2004." <br /> Liquefaction.can be described as a phenomenon where there is a reduction or complete.logs of <br /> soil strength due to an increase in Bore water pressure. The increaso in water pressure is typically <br /> induced by vibrations. 'Liquefaction .mainly affects geologically recent deposits of.loose, fine- <br /> grained sands that are below the groundv►watcr table. <br /> 11ased on the.relative density and well-graded nature of the existing soils underlying the site, the <br /> risk for liquefaction to occur at the site should be considered very low. <br /> E The state of Washington has adopted the international Building Code(IBC). Based on tite soil <br />!: condition's encountered and tile- local geology, per the {IBC} site class "D" can. be used in <br />!: structural design. This is based oil the :inferred range of SPT (Standard Penetration Test) blow <br /> counts for the upper 100 feet of the site relative to Hanel-excavation progress and probing with a <br /> !/-,-inch diameter steel probe rod. Tile pwsenec of glacially consolidated soil conditions Lucre <br /> assumed to be representative for the site conditions beyond the depths explored. <br /> 4.3 Erosion <br />. Ac According to Chapter 1.9.37:030 in the City or Everett Municipal Code(EMC)erosion hazard <br /> areas are defined as follows: <br /> a. These areas defined as high.and very high/severe risk of erosion in the Dames and Moore <br /> Methodology for the Inventory,Classification and Designation ofGeolu ricall 1-Ia�.ardous Areas, <br /> City of 1lvcrett,Washingtoni July 1,1-991,or as revised through best available science: <br /> (1.) High erosion hazard areas include slopes of twenty-five to forty percent in.Qva and Qal. <br /> gcologiq units;and slopes of greater.than forty percent its tither(not:Qva ar Qtil)geologic units. <br /> (2j Very hightsevete crosioii.liaz rd areas include slopes of greater than.fatty pt rcettt in Qva <br /> and.Qal geologic units. <br /> I. <br /> b. Those areas defined as medium risk of gfosion in the Dames and Moore Methodology for the <br /> Inventory,Classification and Designation of C:colo rically Hazardous.Areas,City of Everett, <br /> Washington:July 1, 1991,or as revised through best available science,when they contain debris <br /> and lurid flows,g illyint;or rifling,immature vegetation,or no.vegetation: <br /> I <br /> Agee Till ecdj%-LLt` Page S <br /> 253.845-70(!p <br /> T <br /> i <br />