1130 RAINIER AVE Geotech Report 2025-07-28

• GEOTECHNICAL ENGINEERING STUDY Pivotal Point Apartments • 1110 Rainier Avenue Everett,Washington This report presents the findings and recommendations of our geotechnical engineering study for the site of the proposed apartment development to be located in Everett, Washington. Prior to doing explorations, we were provided with an approximate layout of proposed buildings and a topographic survey of the property. Following explorations, we were provided with an updated plan of the development; this was prepared by ARC Architects. The plan indicated that a building is proposed on the southwestern corner of the development site and on the eastern side of the site. The western portion of the southwestern building will have a finish floor grade of elevation 98 feet, while the eastern portion will be at elevation 94 feet. The eastern building will also have finish floor grade of elevation 94 feet. These finish floor grades will generally be near or just above the existing ground level. 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 the northern portion of Everett. The site that will be developed is on the southern side of an existing Army Reserve Facility, located at the corner of Rainier Avenue and 11th Street. This development area is currently mostly covered with two parking lots. Both lots slope slightly downward to the west. The eastern lot is situated about 4 feet below the western lot. A steep slope separates the two parking lots. The property to the west of the site is approximately 10 feet above the western parking lot; a steep slope separates the site from the adjacent western property. The area east of the site slopes gently away from it. SUBSURFACE The subsurface conditions were explored by drilling six 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. The test borings were drilled on May 3, 2012 using a trailer-mounted, hollow-stem auger drill. Samples were taken at 2.5 to 5-foot intervals with a standard penetration sampler. This split-spoon sampler, which has a 2-inch outside diameter, is driven into the soil with a 140-pound hammer falling 30 inches. The number of blows required to advance the sampler a given distance is an indication of the soil density or consistency. A geotechnical engineer from our staff observed the GEOTECH CONSULTANTS,INC.