6200 12TH DR SE Geotech Report 2022-10-25

GEOTECHNICAL ENGINEERING STUDY Proposed Housing Project 6107 Berkshire Drive Everett, Washington Thisreport presents the findings and recommendations of our geotechnical engineering study for the site of the proposed housing project to be located in Everett. We have been provided with a site plan for the project that was prepared by Environmental Works dated October 11, 2016. Based on this plan, we understand that the housing building(s) will be located near the center of the property extending long in the north-south direction. Parking will be located along the eastern edge of the property. Some gardens, lawns, terraces, and play-space are proposed on the western side of the property. The site is relatively flat, and we anticipate that the lowest building floor and the other above-noted amenities will be at a grade that is near the existing grade. 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 southern portion of Everett. The property is located just north of a right-angle corner of Berkshire Drive. The subject • Catholic Housing property is the southwestern corner of a much larger property that is owned by the City of Everett. Much of this larger property, as well as the subject property, is nearly flat. However, there is a steep slope, inclined at approximately 45 percent and 25 feet tall, at the western edge of the subject. The eastern edge of the subject property, as well as most of the remainder of the larger property, is covered with pavement. The majority of the flat portion of the subject property is grass covered, although there is a driveway in this area around the southern and western edges of the flat portion of the subject property. The western slope of the subject property is covered with trees, mostly deciduous. SUBSURFACE The subsurface conditions were explored by excavating five test pits and three 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 latest proposal. The test pits were excavated on August 25, 2016 with a rubber-tired backhoe. A geotechnical engineer from our staff observed the excavation process, logged the test pits, and obtained representative samples of the soil encountered. "Grab" samples of selected subsurface soil were collected from the backhoe bucket. The Test Pit Logs are attached to this report as Plates 3 through 5. GEOTECH CONSULTANTS,INC.