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• <br /> 2416 61st Street SE Limited Subsurface Exploration and Geotechnical <br /> Everett, Washington Assessment for Slab and Foundation Repair <br /> Table 1 <br /> Pipe Pile Design Parameters <br /> Pipe Minimum Refusal Allowable <br /> Diameter Wall Hammer Size Criteria(1) Load <br /> (inches) Thickness (pounds) (seconds/inch) (kips) <br /> 2 Schedule 80 140 60 4 <br /> (1)Refusal is defined as less than 1 inch of penetration in"X"seconds under constant driving. <br /> Anticipated settlement of pipe pile-supported foundations should be less than 1/2 inch. We <br /> recommend that AESI be present during pipe pile installation to determine the required pile <br /> lengths and keep records of pertinent installation data. <br /> Roof Downspouts <br /> We recommend that all roof downspouts be modified so that water is discharged at a sufficient <br /> distance away from the building(about 6 feet) rather than discharging directly onto the exterior <br /> grade and adjacent to the building foundations. <br /> CLOSURE <br /> We appreciate the opportunity to be of service to you on this project. Should you have any <br /> questions regarding this letter-report or other geotechnical aspects of the project, please call us <br /> at your earliest convenience. <br /> Sincerely, <br /> ASSOCIATED EARTH SCIENCES, INC. <br /> Kirkland,Washington <br /> ORD <br /> iz <br /> '% ` <br /> Matthew A. Miller, P.E. G. Bradford Drew, P.E. <br /> Principal Engineer Senior Engineer <br /> Attachments: Figure 1: Vicinity Map <br /> Figure 2: Existing Site and Exploration Plan <br /> Appendix A: Exploration Logs <br /> Note: Black and white reproduction of this color original may reduce its effectiveness and lead to incorrect <br /> interpretation. <br /> October 26,2021 ASSOCIATED EARTH SCIENCES,INC. <br /> BD/Id-20210370E001-002 Page 7 jy <br />