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PREPARED FOR <br />DEVCO, INC. <br />April 1, 2019 <br />Chase G. Halsen <br />Senior Staff Geologist <br />Keven D. Hoffmann, P.E. <br />Senior Project Manager <br />014DAC <br />�7. <br />0oF wnS� cly� <br />36018 <br />Raymond A. Coglas,'P.E. <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 />