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� <br />L <br />A DAWD l. NEL 7N AND �SSOCU►TES. � <br />Auguat 29, 198j ��E�` n�y <br />Pro3ec*. No. 4183 <br />Page ':xo <br />Locntion R SiLe Deacription <br />TDe inveatigated aite is located south of the interescLion of <br />ilarbeck Road and Mutilteo Boulevard. in HVerett. Mashin8ton. <br />Preaently. the site area is undeveloped, ezcept for ths �aveled 4 <br />extention oi Narbeck Road through the propertY Lo an ezisting � <br />residence south of the aite. Manill and Ring Creek ia located � <br />�uat oif-site toxard the eaat and Narbeck CraeY ia located just } <br />of£-site torrard the reat. Topographically. the eite 2us steep � <br />c�lopes from ita upland area down torrard both creeks. Proa thes� <br />top-of-slope areae. the site moderately slopea torard ths middle <br />oS the area to approzimately juat rreet o2 Lha �av�l road. A <br />swale area ezisLa Mithin the central-loMer porLion, snd appeare t^ <br />broaden and eventually drain into Narbeck Creek. TAe site area <br />is heavily r+oodad. rith alders ganerally rithin tha centnl pertior <br />and coar�y evergreen witRin the eastern and weatern portion. The <br />approximaLe top-of-nlope areas are ehown on the encloeed location <br />map. <br />Soils Conditiona <br />The subaurface aoile stratigraphy is best shown on tha enclosed <br />test pit log9. <br />In general, the site is believed underlain at depth Dy grey, <br />de.nse, silty fine sand/sandy ailL which ie well bedded, conaidered <br />to be Whidbey Fo�ation sails. The creek areas were obaerved to' <br />have these soils present at their base. Portions of the ateep <br />slope areas rre re observed to have thase aoila make up LAe elope <br />area. Only TP-10 indicated the presence of LAe Whidbey Fo�atiott <br />soils near surface within the site development area. Overlying <br />the dense fine grained basal soils is a variably thick sequence <br />of grey to brown, poorly sarted, gravelly, silty to sligAtly <br />silty sand. These soils appear to be glacial outwaeh sands and <br />gravels, but cou].d be the upper portion of the Whidbey Formation <br />so:: ,?t�ese seils were found to underly a 2' to 4' thick straLa o. <br />grey, dense, poorly sorted silty sand with gravel, considered <br />to hr. glacial Cill. The glacial till was found to occur only <br />