3214 BROADWAY Geotech Report 2022-10-25

American Property Development ES-0599.06 June 9, 2016 Page 2 Revised October 16, 2017 Project Description Construction of a multi-family apartment complex is proposed for the subject property. One level of below grade (garage level) construction relative to existing grades surrounding the property is proposed. Building setbacks from the property line will be minimal, and the use of temporary shoring or a combination of temporary slopes and shoring will be necessary to complete the garage level excavations. The shoring and open-cut excavations will be necessary along the north, south, and west perimeters of the site. To the east, the building structure will daylight along the Broadway Avenue North frontage. Based on current plans, excavations on the order of 12 to 15 feet will be required to establish subgrade elevations for the below grade level. We anticipate the proposed building construction will consist of reinforced concrete and post- tensioned slabs throughout the lower levels. The upper residential levels will be supported on the post-tensioned slab and consist of relatively lightly-loaded wood or steel stud framing. Based on our experience with similar developments, we anticipate column loads on the order of 300 to 400 kips, and perimeter wall loads of approximately 5,000 pounds per lineal foot. If the above design estimates are incorrect or change, ESNW should be contacted to review the recommendations in this report. ESNW should review the final design to verify that our geotechnical recommendations have been incorporated into the final design. Surface The site is located southwest of the intersection between Broadway Avenue North and 32nd Street in Everett, Washington. The subject property is rectangular in shape consisting of 6 adjoining tax parcels (Snohomish County Parcel Nos. 0043907630-3100, -3000, -2700, -2500, - 2300, and -2200) totaling approximately 0.77 acres. The approximate location of the subject property is depicted on the Vicinity Map (Plate 1). The subject property is bordered on the north by 32nd Street and on the south by a single-family residence. The subject property fronts Broadway on the east for approximately 300 feet. An access alley way adjoins the subject property on the west. The approximate limits of the property are illustrated on the Boring and Test Pit Location Plan (Plate 2). The subject property was previously used for both residential and commercial purposes, however, all structures previously occupying the site have been removed. The overall topography across the site is gently to moderately sloping, and descends at an even angle to the east. Vertical relief across the site east-west is estimated to be on the order of 10 to 15 feet. There are no geologic hazardous areas identified on the subject property. Earth Solutions NW,LLC