4330 HOYT AVE Geotech Report 2022-10-25

Geotechnical Engineering Evaluation—REVISED NGA File No.1148519 Staniford Residence Remodel June 23,2020 Everett,Washington Page 2 We were informed that you have previously performed significant foundation repairs within the crawlspace area consisting of adding a new east-west trending grade beam foundation, as well as several isolated footing pads throughout the crawl space area, and improving the overall drainage picture around the residence. We were also informed the house was releveled along with the other repairs and you have not observed signs of settlement since the repairs were made. SCOPE The purpose of this study is to explore and characterize the site surface and subsurface conditions, and provide general recommendations regarding the observed settlement. Specifically, our scope of services for this project included the following: 1. Review available soil and geologic maps of the area. 2. Confirm the site soil conditions within the site with trackhoe excavated test pits. Trackhoe was provided by client. 3. Perform laboratory analysis on selected soil samples,as needed. 4. Provide recommendations for site preparation and grading, as needed. 5. Provide recommendations for supporting the addition foundations on deep foundation systems. 6. Perform grain-size sieve analysis on soil samples,as necessary. 7. Provide recommendations for temporary and permanent slopes. 8. Provide recommendations for retaining walls,as necessary. 9. Provide recommendations for slab and pavement subgrade preparation, as needed. 10. Provide recommendations for site drainage and erosion control. 11. Document the results of our findings, conclusions, and recommendations in a written geotechnical report. SITE CONDITIONS Surface Conditions We initially visited the site on November 13, 2019 and November 21, 2019 to observe the existing site conditions. The site consists of a rectangular-shaped parcel covering approximately 0.25 acres. The site is currently occupied by a single-family residence within the central portion of the property. The property is bordered to the north by existing residence buildings, to the east by Hoyt Avenue, to the south by 44th Street SE,and to the west by an alleyway. The ground surface within the property consists of grass yard areas in the eastern side of the property and exposed soils from recent grading activities along the western portions of the site. We did not observe any surface water within the property during our site visits. The existing site layout is shown on the Schematic Site Plan in Figure 2. NELSON GEOTECHNICAL ASSOCIATES,INC.