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..'_ '_ " '� '�. . .. .......... ...... ....w ..�..�. . �a.i o.� ae�.e � r. or <br /> . � Seniork Rscommemlatiau From Bos+r ojSlopc 97-IZ-;O <br /> 1Mtin shwrplar <br /> _1{�AillsoBhd, Everclf, If'ashirigta� <br /> Bh•d. aad other local improvements is included as Plare 2 at thc end of tUis letter. Site topogr�phy is <br /> also uicluded on this map. <br /> The lot ic locnted in an nreo gcologicaUy mapped es Vashon Advnnce Outwas6 (Qm) according to the <br /> Geologic Map of Everett, Snohomish Counry, Washington by Mirterd datcd 1985. A copy of e portiou <br /> of U►e Geolo�ic Mop including the site aree mny be found as Plale 3 et the end of this later. Advance <br /> (hrlwash (Qva) deposits consisting of dense to very dense, dry, ligLt brown to gTey brown, tine- �u • <br /> mediunrgrained sands and silty sands wcre observed in a cut along the ba�e of the slope on the adja:ent <br /> lot to the eust. Vashon Advanco (hrtwesh (Qva) dcposits gcnerAlly cxhibit exccllent enEiueering <br /> c6�racteristics such os cut slope stebiliry, foundetion support �nd scismic stebility becausc thry are <br /> genernlly well drnined nnd they have bean overconsolideted and comptessed by theusands of feet of <br /> glaciel ice. Local instahilities may develop in areas where seepege occurs aloag stcap slopcs or where <br /> �Uep have been exposed to erosional forces. <br /> 'Che slope nlong the bockside ofthe lot is stnble. !t u nnd will nlways be svsecptiblc to erosional fotces. <br /> i.lver time, the slope should be expected to show soma signs of erosion. Givca thc emounc of r�iufall in <br /> this area and tlie type of mnteriels that the slopc is medc of- this is completely natural. i.f instebiGties or <br /> erosional sloughs ara observed or become apperent, CFS, Inc. shouad bc contected immedintely to <br /> eccess the situntion ond develop remediel recommendations. Any disturhance� to the slope that ue leR <br /> wichecked could Uelp to eccelerate the naturol ero�ionnl proccsscs thnt will tnke pince over time. <br /> Given the conditious of the site es observed during our site visit on Dec 10, 1997, tLe iaformation <br /> revie�vcd and readily available et the time this letter was prepered and U�e liivited scope of work <br /> 2 GES, Inc. <br />