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Geotechnical Engineering Report lierracon <br /> Proposed VA Outpatient Clinic Everett, WA 98203 <br /> May 15, 2020 Terracon Project No. 81195126 GeoReport <br /> I <br /> REPORT SUMMARY <br /> I <br /> Topic Overview Statement <br /> Redevelopment of an approximately 1.89-acre site for a one-story building with <br /> Project partial second story and surrounding asphalt parking. <br /> Description 22,000 SF main level and a partial, 7,133 SF second-story over the southern <br /> I portion of the building <br /> Existing fill was observed at the exploration locations to depths of 6 to 15 feet below <br /> Geotechnical ground surface. <br /> Characterization Loose to medium dense sand and silt to about 15 feet below ground surface (bgs) <br /> I <br /> Very stiff to hard sand with silt below about 15 feet bgs <br /> Groundwater table ranges from approximately 5 to10 feet bgs <br /> Existing granular soils can be reused for engineered fill provided they are in an <br /> acceptable moisture condition and free of organic material <br /> Beneath proposed spread footings, overexcavate existing soil to depth of <br /> Earthwork approximately 3 feet and replace with structural fill, or use pin piles to support <br /> I foundation loads <br /> Proposed Environmental Cleanup Action of remedial excavation of the soil impacts is <br /> _discussed <br /> Shallow foundations are recommended provided recommendations in Earthwork <br /> I Shallow are followed <br /> Foundations Allowable bearing pressure = 2,000 lbs/sq ft (spread and wall footings) <br /> Expected static settlements: < 2 inch total, 2/3 of total differential <br /> With subgrade prepared as noted in arthwork <br /> IAsphalt: <br /> 3-inch Asphalt over 4-inch granular base in Light Duty areas <br /> Pavements 3-inch Asphalt over 6-inch granular base in Heavy Duty areas <br /> I Concrete pavements of minimum 5-inch thickness should be used for driveway <br /> entrances, loading docks, dumpster pads, and where heavy vehicular maneuver is <br /> expected. <br /> I <br /> General This section contains important information about the limitations of this geotechnical <br /> Comments engineering report. <br /> If the reader is reviewing this report as a pdf,the topics above can be used to access the appropriate section <br /> I of the report by simply clicking on the topic itself. <br /> 2. This summary is for convenience only. It should be used in conjunction with the entire report for design <br /> purposes. <br /> I <br /> I <br /> I <br /> Responsive • Resourceful • Reliable <br />