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gravity discharge away from the building. In addition, all retaining walls should be lined with <br />a minimum, 12-inch-thick, washed gravel blanket provided over the full height of the wall, and <br />which li-s into the footing drain. Roof and surface runoff should not discharge into the footing <br />drain system, but should be handled by a separate, rigid, tightline drain. In planning, exterior <br />grades adjacent to walls should be sloped downward away from the structure to achieve surface <br />drainage. <br />CLOSURE <br />We appreciate the opportunity to participate on this project. If you have any questions <br />regarding this letter -report or require further information, please do not hesitate to call. <br />Sincerely, <br />ASSOCIATED EARTH SCIENCES, INC. <br />Kirkland, Washington <br />Bruce W. Gucnzler, P.E.G. <br />Project Geologist <br />Attachments: Figure 1: Site and Exploration Plan <br />Exploration Logs HA-1 through HA-3 <br />uwoAs <br />KE070277A1 <br />Projectss2007027MB%VP <br />Eznn¢s 11120/d� <br />Kurt D. Merriman, P.E. <br />Principal Engineer <br />0 <br />