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I0�`1-�d <br /> TIELp REY'�R�./ �`� r I�� (�� <br /> ProjccC Huward Street Additiou File No.: 2910 <br /> Cornerstone <br /> � ' G80t8ChIlICB�, �I1C. Client: Cascade Tcsting Lab Date: 2010-4-ZO <br /> A Uivisinn of Robinson ti Nublc,lnc. <br /> 17625?30��Avenue NE C102 Location: Everett Report No: 1 <br /> Woodinville,WA 98072 Wcather: Light RainlOvcrcast Pagc: 1 af 3 <br /> PurposeoF Subgradeevaluatian <br /> Phone: a25-844-1977 Visit: <br /> Fax: 425-844-1987 By: 7RW <br /> A�c wcrc onsite at?he request of Mario, with Amcrican Home Builders, for the purpose of cvaluating <br /> foundatim�subg,auc for two structures locnted at 2504 and 2510 Howard Strcct. <br /> Wc obscrvcd that a majority of hvo existi�g structures had been dcmolishcd at tl�c above mentioncd <br /> addresses except for foundation and first lloor fr;nning. We also observed tha[foundation subgrades had <br /> bcen prepared on tne�orth und soutli sides of the existing four.dation footprint. Poundations were also <br /> prepared tor a new carport structurc locatcd in thc soutlicrn region of the lot. <br /> �zcavation depth for the plunned new foundutions rungud from approximately 0 to 2.5 feet for the <br /> pla�med residcntial structures. We probed thc excavations for the plauned residential additions witli a <br /> half inch diametcr stecl praUc rod a��d the probe rod penetraicd 1 to 2.5 feet in depth. SuU�ade soils <br /> consistcd of nativc wcaUicrcd brown silty fine sand witl�organics nnd tracc grlvcl mid gray sand and <br /> bravel. It is our opinion that tl�e foimdation sabgradcs should Ue overexcavated prior to pauring <br /> Ibotings. �Ve sl�ould Ue rctaincd ta evaluatc overexcavation of planned new foundation suUgradcs. We <br /> cxpcct that ioundation overcxcavation would Uc on the ordcr of l foot in depth in die western lialf'of the <br /> residcncc at 2504IIoward Strcct and 2 icci in dcpth for thc castcm half of thc structurc at 2504 and <br /> d�roughotrt the cntire area of tlic structure at 2510 Howard Strcet. <br /> Wc also undcrstar.d thc intcrior colurtms will be pourcd. In thc arca of thc planncd westcro structure at <br /> 2504 we also oliservcd diat fill had Ucen placed to backfill an excavation made to removc a septic <br /> systc:n. We urc net uw�re of campuclion lcst performed on tliis Uackfill. If interior wiumns 1re plan��r,l <br /> in tltc location of this Uacl:fill or witl�in u 1 [Iorizontal to 1 Verticzl inclination from the base of thc <br /> ('ooting to the bnsc of the excavation madc for thc septic system drain ficld,thc Uackfill should be <br /> removcd and repluced with structural fiil. Structura�l fill Uy defnition is fill placzd under the super�i,i, :� <br /> oPn gcotechnical profcssional. <br /> Sclticmcnt:md crticking was observcd along the found,riion wnlls for die existing structure. It uppc:us <br /> that the existing struch�rc has Uecn onsite for an extendcd period of time. �'Ve would expect thal tl�is <br /> sctdcmcnt would havc nccurccd duc to tlic suUgradc soils thc esisting structurc was built on. Wc do nnt <br /> I<now if il�is set�lement is complele. Some differential settlemcnt could occur betwecn the existin� <br /> foundations and planned new loundations. Wc arc not aw�re of huw the new Foundation will Uc <br /> conncctcd to thc cxisting founclution. ^ !//J <br /> � � ' � ��-� <br /> ' ;� v <br /> AttachiucnL• Siyied: �_ _ >�i� <br /> Distribution: � ,' / <br /> / <br /> A Lv. ,i1� �E, <br /> � <br /> : <br /> ; 4 <br /> � <br /> '; <br /> r <br /> �.; �;s <br /> >: <br /> _�•t <br /> �..k-�,..�:� - <br /> -'` � t �f ; °,. : ,� �rYA t v = ' � � ��1l � ` <br /> � � � .�a � ac,+ �tr � � � v � 7t t 1 � 1. li � 'cJ4 )B a .. <br /> r., . ,'.vJ�_w�ill.r'w����.a"�cu.'�:�`�Jm.n°�S'a9bF^.,f����� � :! . !V � t .4„ .... ,� .)� i .� ��, .. . �lt�its .y+'r�iiijS.+�d`i' , <br />