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COBALTCobalt Geosciences,LLC <br /> P.O.Box 82243 <br /> . G E O S C t E'N G H S Kenmore,Washington 98028 <br /> October 6, 2019 ; _ <br /> D <br /> ilv <br /> Sarmanjit Dhaliwal <br /> sarmanjits@ gmail.com NOV 2 4 2020 <br /> RE: Limited Geotechnical Investigation I TY FEVE ETl' <br /> Proposed Residence Permit ServILLS <br /> 2712 Taylor Drive <br /> Everett,Washington <br /> Dear Mr. Dhaliwal, <br /> In accordance with your authorization, Cobalt Geosciences, LLC has prepared this letter to <br /> discuss the results of our limited geotechnical investigation at the referenced site. <br /> The purpose of our evaluation was to determine the shallow soil and groundwater conditions and <br /> provide recommendations for grading,foundation design, infiltration feasibility,and suitability of <br /> existing soils for use as structural fill. <br /> Site and Project Description <br /> The site is located at 2712 Taylor Drive in Everett, Washington. The site consists of one <br /> irregularly shaped parcel(No.00417400000500)with an area of about 0.42 acres. <br /> The property is undeveloped and vegetated with grasses, bushes/shrubs, and variable diameter <br /> evergreen and deciduous trees. <br /> The site slopes gently downward from southeast to northwest at magnitudes of less than 8 <br /> percent and relief of about 6 feet. The site is bordered to the east and south by residential <br /> properties,to the north by Taylor Drive,and to the west by Baker Drive. <br /> The project includes construction of a new multi-story residence in the central portion of the <br /> property. Stormwater management may include dispersion, detention, or infiltration facilities <br /> depending on feasibility. <br /> Area Geology <br /> The Geologic Map of Washington — Northwest Quadrant indicates that the site is underlain by <br /> Vashon Glacial Till. <br /> Vashon Glacial Till is typically characterized by an unsorted, non-stratified mixture of clay, silt, <br /> sand,gravel, cobbles and boulders in variable quantities. These materials are typically dense and <br /> relatively impermeable. The poor sorting reflects the mixing of the materials as these sediments <br /> were overridden and incorporated by the glacial ice. <br /> Soil & Groundwater Conditions <br /> As part of our evaluation, we excavated two hand borings to determine the shallow soil and <br /> groundwater conditions,where accessible. <br /> www.cobaltgeo.com (206)331-1097 <br />