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ti MF <br /> May 9, 2024 <br /> ES-8528.05 <br /> Earth Solutions NW LLC <br /> Pacific Ridge — DRH, LLC Geotechnical Engineering,Construction <br /> 17921 Bothell-Everett Highway, Suite 100 Observation/Testing and Environmental Services <br /> Bothell, Washington 98012 <br /> Attention: Jason Atkin <br /> Subject: Building Drainage <br /> Chelsea Heights <br /> 9506 — 7th Avenue Southeast <br /> Everett, Washington <br /> Dear Jason: <br /> In accordance with your request, Earth Solutions NW, LLC (ESNW) has prepared this letter <br /> regarding building drainage. ESNW reviewed the referenced documents and visited the site to <br /> observe site conditions. If buildings will incorporate crawl spaces rather than slab-on-grade, in <br /> our opinion, a crawl space drain system will provide adequate drainage in lieu of perimeter footing <br /> drains. The crawl space drain must provide positive drainage to an appropriate outlet. If footing <br /> drains are not installed, we recommend backfilling footings with a relatively impermeable soil. <br /> We trust this letter meets your current needs. If you have any questions or if additional <br /> information is needed, please call. <br /> Sincerely, <br /> EARTH SOLUTIONS NW, LLC <br /> T. <br /> �c w <br /> W ASyyccy� <br /> y D <br /> YL <br /> -off 53803 �c� MAY 10 20 <br /> -ISTER� CITY OF ?4 <br /> S/ONA\- 05/09/2024 Perrnit Se FRetr <br /> es <br /> Henry T. Wright, P.E. <br /> Associate Principal Engineer <br /> References: <br /> • Typ. Crawl Space Drainage Design, prepared by Pacific Ridge Homes <br /> • Geotechnical Engineering Study, prepared by ESNW, ES-8528.01, dated July 18, 2022 <br /> 15365 NE 901h Street,Suite 100 • Redmond,WA 98052 • (425)449-4704 <br /> 3130 Varney Lane,Suite 105 • Pasco,WA 99301 • (509)905-0275 <br /> esnw.com <br />