3530 COLBY AVE COCOON HOUSE Geotech Report 2022-10-25

GEOTECHNICAL ENGINEERING STUDY Proposed Three-Story Building 3530 Colby Avenue Everett, Washington This report presents the findings and recommendations of our geotechnical engineering study for the site of the proposed three-story building to be located in Everett. We were provided with a site plan and floor plans prepared by GGLO Design dated August 26, 2016. Based on these plans, we understand that the development will consist of demolishing the existing church building and constructing a new three-story building of type VA construction on the property. Based on the provided preliminary plans, the building will be offset as little as 14 feet from the western property line, a range of 0 to 5 feet from the southern property line, 5 feet from the eastern property line, and 67 feet from the northern property line. It is our understanding that the existing asphalt parking lot on the northern end of the property will remain. The lowest finished floor of the proposed building will be near the existing site grade, thus there are no planned deep excavations for the building. If the scope of the project changes from what we have described above, we should be provided with revised plans in order to determine if modifications to the recommendations and conclusions of this report are warranted. SITE CONDITIONS SURFACE The Vicinity Map, Plate 1, illustrates the general location of the site in Everett. The rectangular- shaped subject site is located at the northwestern corner of Colby Avenue and 36th Street. It has approximate dimensions of 254 feet in the north-south direction and 113 feet in the east-west direction. The site slopes gently downward from east to west with a change in elevation across the site in the order of 3 to 5 feet. Most of the property is covered by a church which overlies a basement floor. The depth of the basement varies from 4 to 8 feet below the surrounding site grade. An asphalt parking lot covers the northern 65 feet of the property and the area west of the church. The remainder of the property is covered by grass lawn with several landscaping beds. In addition to the two streets, the subject site is bordered by an alley to the west and an undeveloped parcel of land to the north. The property west of the subject site and across the adjacent alley contains three-story multi-family building over a half-basement that has a large offset from the subject site. SUBSURFACE The subsurface conditions were explored by drilling four test borings at the approximate locations shown on the Site Exploration Plan, Plate 2. Our exploration program was based on the proposed construction, anticipated subsurface conditions and those encountered during exploration, and the scope of work outlined in our proposal. GEOTECH CONSULTANTS,INC.