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4 <br /> 41) <br /> 17311-135th Ave.N.E.Suite A-500 <br /> Woodinville,WA 98072 <br /> \/ NELSON GEOTECHNICAL <br /> fig, (425)486-1669 <br /> f r ` :, . ASSOCIATES.INC. wwwnelsongeotech.com. <br /> February 11,2021 <br /> Mr. Robert Spencer, <br /> 1910 West Mukilteo Boulevard a 8 <br /> Everett,Washington 98203 <br /> VIA Email:winechef1950@email.com <br /> JUL 0'1 2021 <br /> Geotechnical Engineering Evaluation <br /> CIT ; ERT ' <br /> Spencer Garage Addition perYmOFit Services " <br /> VE <br /> 1910 West Mukilteo Boulevard <br /> Everett,Washington 98203 <br /> NGA File No. 1238721 <br /> Dear Mr.Spencer: <br /> We are pleased to submit the attached report titled "Geotechnical Engineering Evaluation —Spencer <br /> Garage Addition— 1910 West Mukilteo Boulevard—Everett Washington."This report summarizes our <br /> observations of the existing surface and subsurface conditions within the site and 'provides general <br /> recommendations for the proposed site development. Our services were completed in general <br /> accordance with the proposal signed by you on January 22nd,2021. <br /> The subject property consists of a rectangular-shaped parcel occupied by a single-family residence in the <br /> central portion and a garage and a sports court in the far south west portion of the property.Vegetation <br /> within the site consists of grass-covered yard areas bordered by shrubs and one young to mature tree <br /> between the house and garage.Topography within the site generally slopes gently to the north with the <br /> sports court raised approximately 2.0 feet above the main yard and a short steep slope in the far <br /> southwest corner. We understand the proposed development will consist of demolishing the sports <br /> court and extending the garage to the south. <br /> We performed three hand auger explorations throughout the property as well as one test pit which was <br /> intended to be utilized for our small-scale pilot infiltration testing (PIT). Our explorations indicated that <br /> the site was underlain by surficial topsoil/undocumented fill with competent, native glacial soils at <br /> depth. <br /> It is our opinion that the proposed site development is feasible from a geotechnical engineering <br /> standpoint, provided that our recommendations for site development are incorporated into project <br /> plans. In general, the native glacial soils underlying the site should adequately support the planned <br /> structures. Conventional shallow spread foundations should be advanced through any loose soils down <br /> to the competent native bearing glacial material interpreted to underlie the site, for bearing capacity <br /> and settlement considerations. These soils should generally be encountered approximately 2.0 to 4.0 <br /> feet below the existing ground surface, based on our explorations. However, deeper areas of loose soils <br /> or undocumented fill could be encountered in unexplored areas of the site. If encountered, these soils <br /> should be removed and replaced with structural fill for foundation and pavement support. <br /> NELSON GEOTECHNICAL ASSOCIATES, INC. <br />