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PREPARED FOR <br /> DEVCO, INC. <br /> April 1, 2019 <br /> l <br /> Chase G. Halsen <br /> Senior Staff Geologist <br /> Keven D. Hoffmann, P.E. <br /> Senior Project Manager <br /> vxD A CQ ' <br /> ,yOV WASIfq� <br /> ''C 160 <br /> Raymond A. Coglas, P.E- 7--- <br /> Principal Engineer <br /> GEOTECHNICAL ENGINEERING STUDY <br /> FOUR CORNERS <br /> 8102 EVERGREEN WAY <br /> EVERETT, WASHINGTON <br /> ES-6516 <br /> Earth Solutions NW, LLC <br /> 1805 — 136th Place Northeast, Suite 201 <br /> Bellevue, Washington 98005 <br /> Phone: 425-449-4704 1 Fax: 425-449-4711 <br /> www.earthsolutionsnw.com <br />