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i <br /> i <br /> � <br /> ( S��bsurface Expinmtion and <br /> Silrer Lake�Llnll Bnrtcl!Drug Store Geotednaical Engineer,'r,g Repon <br /> Everett, �t4�.shin�>enn Design Retammc�ufntions <br /> � � I1. DESIGN RECO�I�tENDAT[ONS <br /> 1 SA WTRODUCT[ON <br /> i Ow• explorations indicate that, from a �eotechnical standpoint, the parcel is suitable for tlie <br /> i <br /> proposed development provided the recommendatior,s conta:ned herein are properly fo owe . <br /> I The bearing strawm ranges in dcpth from about 4 to 8 fePt below ezis[ine site grades and <br /> overcxcavation of unsuitable soils to czpose acceptable bearing conditions is recommended. <br /> ( 6.0 SI"I'E PRGPARATION <br /> � Old foundations presently on die sire that are under building areas or not part of fuWrc plans <br /> should he remove�. Any buricd utilities shuuld bc removed or relocated if they are uuder <br /> building areas. The resul[ing depressions should be backfilled with structural till as discussed <br /> ` under the Strucn�rnl Fil! section. <br /> 1 <br /> � Site preparation of planned Uuilding and parking areas should indude removal of all pavement, <br /> landscaping, and any other deleterious materizl. The existine remediation system should not <br /> be disturbcd widiout prior approval. r\reas where loose surficial soils exist due [o erubbing <br /> t op�rar.ons should be considered as fill to die depth of dis[urbance and treated as subsequendy <br /> trecommended for structural fill placement. The project environmental consultan[ (Landau) <br /> should be contacted to identify the location of the existing remzdiation system prior to site <br /> ( grading activities. <br /> Beneath all building and pavement areas, loos:; surlicial soils, fill, and peat should be stripped <br /> � down to die underlying very dense glacial tilL [n the case of d:e sand fill, we recommcnd that <br /> this material Le removed do�vn to bearing soils wliere it underlies foundations. A[ this site, <br /> bcaring soils are defined as eithcr native, dense glacial till or the existing r.,ushed rock fill. <br /> ( �Vhere Uearing soils are below dte ground water, rock trenclies should be utilized as discussed <br /> in Scction 8.0 below. �Vhere the bearin�� surface is above die �round watcr, the removed sand <br /> � [ill could be replaced and recompacred if it meets the requirements for structural fill given in <br /> Section 7A. Wl7ere die sand fill underlies slabs and pavements, we recommend that a <br /> minimur.� of 2 feet of the material be removed, the resulting subgrade recon:pac[ed to die <br /> st:uctural fill standard, and the site filled back to design subslab elevation with strucrural fill. <br /> � ln the case of die crushed rock till, it should be recompacted to a firm and unyieldine condition <br /> ` as determined by the geotechnical engineer or his represeuta[ive prior to foundation or <br /> � stn:ctural fill placement. <br /> Since tlic �ensity of the srripped sub,rade may be variable, random sof[ pockets may exist and <br /> � th� �cpdi and extent uC stripping can best be determined in the field by the geotechitical <br /> Dcre�.�aer 30, 30G) ASSOG�ITED F_dRTF!SCIE,VCES, lNC. <br /> � r:.s.r,� xu=;:r„v:c r,�,��<<scaunv��xeuvr Page 6 ,�'� <br />