Laserfiche WebLink
(1) Slopes of twenty-five to forty percent in other(not Qva or Coal)geologic units." <br /> Based on otir review,according to the EMC,the western end of the site that slopes morn:than 44 <br /> percent is classified as a very high erosion heard area. The remaining portion$ of the site are <br /> classified as high.erosion.hazard areas. <br /> tn.our opinion,the erosion hazard Classification is not a limiting factor in site development. The <br /> potential for crosion to occur on this site can be mitigated by installing appropriate Temporary <br /> Erosion and Sediment Control (TESC) treasures prior to construction and maintaining them <br /> during construction. TESC measures roust be in place prior to anti maintained daring <br /> construction activity at till:site. lit our opinion,the potootial-for crosion is not a.linllting factor in <br /> site development. Erosion. hazards can he ittitigated by applying Best Management Practices <br /> (I3MPs) outlined in the Washington. State Department of Ecology's (Ecology) . tortttivcttctr <br /> tLlrltrrr;r{�trijt:l Mn►ual fir 13 evient Washiliglon. <br /> Temporary Erosion and Sediment Control.(TESL) measures,.as required by the City of Ever-tt, <br /> should be in_place prior to the start of Construction activities at tits site. <br /> 5.0 CONCLUSIONS AND R)aC`.OM:MFNBA '[CENS <br /> g.I ,, tier I <br />! Based oil ocir study, in our opinion,sail and groundwater conditions at the site are suitable for the <br /> proposed development. The new structure can be supported on conventional spread ;footings <br /> bearing on the existing q ganic-free native site soils observed at 3.0 to .0 feet below surface <br /> grade;i, or on structural.fill placed above these existing native soils. Floor slabs and pavements <br /> should be similarly supported. <br /> Tlie xxativo.roils encountered at tlxe site contain a high enough.percentage.of Bites (silt and clay- <br /> size particles) that will make them diffictil# to compact as structural till when too eve#. <br /> .accordingly, the ability to use the soils from site excavations as structural fill will depend on <br /> their .moisture content and the prevailing weather conditions at the time of constriction, If <br /> grading activities will take place during the winter season, the owner should be prepared to <br /> import free-drAiniing granular material for use as sti uetutal fill and backlill. <br /> The fallowing; sections provide detailed recommendations regarding these. issues and other <br /> geotechnical design.considerations. These.reeoninicndattons should be incorporated into the final <br /> design drawings and constriction specifications. <br /> 1.2 Site Preparation and!grading <br /> sit <br /> To preiiare the e.for eonstruction, all vegetation, organic surfaccx sciils; and other deleterious <br /> tilaterials including any existing structure-;, foundations or abandoned Utility line should be <br /> stripped and removed from the new development areas. Organic topsoil will not be suitable for <br /> use as structural fill, but may be used for limited depths in non-structural.areas. The existing fill <br /> observed its the upper 3.0 to .0 feet of the site is in A loose Condition iiild contains Cn(?til3 <br /> Aps Eta imering,LLC Page <br /> 253-845-7t9i0 <br /> z <br />