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October 6, 2015 <br />ES-4011 <br />Veritas Construction, Inc. <br />22819 Woodway Park Road <br />Woodway, Washington 98020 <br />Attention: Ms. Ashley Previs <br />Subject: Stability Assessment <br />Proposed Vault Structures <br />Soundview Business Center <br />Everett, Washington <br />Reference: Associated Earth Sciences, Inc. <br />Geotechnical Report <br />Dated March 31, 2000 <br />City of Everett <br />Municipal Code <br />Chapter 37 (Critical Areas) <br />Packland <br />Preliminary Utility Plan <br />Sheet C 1, dated September 1, 2015 <br />Dear Ms. Previs: <br />Earth <br />I Solutions <br />NW«< <br />Earth Solutions NW LL.0 <br />• Geotechnical Engineering <br />• Construction Monitoring <br />• Environmental Sciences <br />OCT 12 2015 <br />CITY OF EVERETT <br />Planninq Dept. <br />In accordance with your request, Earth Solutions NW, LLC (ESNW) has prepared this letter <br />and assessment of stability at the location of the proposed detention vault structures. Our <br />scope of services included onsite investigation of subsurface conditions, review of the <br />referenced documents, and stability analysis. <br />Project Description and Geology <br />The subject site is located northwest of the terminus of 36th Avenue West in Everett, <br />Washington. The property consists of one tax parcel (Snohomish County Parcel Number <br />28040300200100) totaling approximately 39.48 acres. Development of a light industrial <br />business center is currently proposed at the subject property. The proposed development will <br />include a series of concrete tilt -up warehouse buildings, paved parking areas, and associated <br />infrastructure improvements. Grading activities will involve cuts and fills on the order of roughly <br />20 to 40 feet (or more in some areas) to establish design grades. Stormwater will be conveyed <br />to a series of detention vault structures located along the north and west margins of the <br />development area. The stormwater vaults will incorporate control structures that release into <br />armored spillways within the natural drainage courses surrounding the property. <br />1805 - 136th Place N.E., Suite 201 0 Bellevue, WA 98005 0 (425) 449-4704 9 FAX (425) 449-4711 <br />