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". Earth <br /> (Solutions <br /> NWS« <br /> June 26, 2012 Earth Solutions NW LLC <br /> Revised June 28, 2012 <br /> • <br /> ES-2432 • Geotechnical Engineering <br /> • Construction Monitoring <br /> • Environmental Sciences <br /> Premier Storage Everett, LLC <br /> 5729 Lakeview Drive Northeast, Suite 200 <br /> Kirkland, Washington 98033 <br /> Attention: Mr. Jeff Norris <br /> Dear Mr. Norris <br /> Earth Solutions NW, LLC (ESNW) is pleased to present this report titled "Geotechnical <br /> Engineering Study, Proposed Public Storage Facility, 9606 & 9610 — 19th Avenue Southeast, <br /> Everett, Washington". In general, the site is underlain by several feet of fill overlying firm glacial <br /> till deposits. In our opinion, the proposed storage buildings can be supported on conventional <br /> continuous and spread footing foundations bearing on competent native soils, re-compacted <br /> native soils, or structural fill. Due to the presence of up to about seven feet of loose fill, footings <br /> for the new buildings should be overexcavated a minimum of four feet and grades restored with <br /> structural fill. ESNW should observe the overexcavation to confirm conditions and provide <br /> additional recommendations for the foundation subgrade support. Where loose or unsuitable <br /> soil conditions are exposed at overexcavation subgrade elevations, compaction of the soils to <br /> the specifications of structural fill, or additional overexcavation and replacement with a suitable <br /> structural fill material will be necessary. <br /> Groundwater seepage was not observed at the boring locations. However, seepage should be <br /> expected during grading activities depending on the time of year they take place. <br /> Recommendations for foundation design, site preparation, drainage, and other pertinent <br /> recommendations are provided in this study. We appreciate the opportunity to be of service to <br /> you on this project. If you have questions regarding the content of this geotechnical <br /> engineering study, please call. <br /> Sincerely, <br /> EARTH SOLUTIONS NW, LLC <br /> vSe `Ri el, :d.. <br /> ' S nior Project(Gee ogist <br /> 1805-136th Place N.E.,Suite 201 • Bellevue,WA 98005 • (425)449-4704 • FAX(425)449-4711 <br />