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OTTO ROSENAU & ASSOCIATES, INC. <br />Geotechnical Engineering, Construction Inspection 8 Materials Testing <br />67ti7 M. L. King Way Soulh, Seattle, Washington 981183216 USA <br />---- Tei: (206) 725-4600 • Toll Free: (888) OTTO-4-US • Fax: (206) 723-2221 <br />WBE W2F5913684. WABO RegisteredAgency. Webs@e: mvw.ottorosenau.com <br />July 7, 2006 <br />Mrs. Dorothy Mascio <br />1024 35`h Street <br />Everett, WA 98021 <br />Re: Geotechnical Engineering Report <br />Mascio Foundation Repair <br />1024 35`h Street <br />Everett, WA 98021 <br />Snohomish County Parcel # 00451500501101 <br />ORA Project Number: 06-362 <br />INTRODUCTION <br />BG�o-�ou� <br />'JVe understand that up to 2 inches of settlemenf has occurred along a portion of the west side of <br />the existing residence located at 1024 351h Street in Everett, Washington. We also observed <br />minor cracks at the northeast corner of the residence along the north and east foundation walls, <br />but stabilization of the northeast corner is outside of the scope of this pruject. <br />Robbins and Company proposes to stabilize and re-level the perimeter foundations at portions <br />of the west foundation walls. They propose to accomplish this by underpinning these poRions of <br />the residence with 6 hydraulically driven Grip-Tite piers. The Grip-Tite piers consist of 3-inch <br />diameter steel pipe sections that will be attached to the existing foundation walls with steel <br />brackets. Each of the piers will be hydraulically advancecl individually until slight movement of <br />the foundation wall is observed. Once all of the Grip-Tite piers are installed in this manner, <br />several piers wiil be connected hydraulically and will uniformly lift portions of the building until it <br />is re-leveled. <br />Please see the attached figure titled "Vicinity Map" for an approximate location of the project <br />site. "fhe attached plan sheet titled "Mascio Residence Foundation Repair" presents our <br />specific recommendations for the locations and installation procedures related to the proposed <br />foundation repair. <br />EXISTIMG CONDITIONS <br />We comp�eted a brief site visit to the site on June 14, 2006 to evaluate the existing conditions at <br />the residence. The sitE is generally level with an elevatiun of approximately 200 feet above sea <br />level, based on information from the United States Geologic Survey (USGS) topographic map <br />forthis area. <br />