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Earth <br /> 1 Solutions <br /> wwuc <br /> June 20, 2018 Earth Solutions NW LLC <br /> ES-6067 Geotechnical Engineering,Construction <br /> Observation/Testing and Environmental Services <br /> Mr. Paul Korenovsky <br /> 4321 South 3rd Avenue <br /> Everett, Washington 98203 <br /> Dear Mr. Korenovsky: <br /> Earth Solutions NW, LLC (ESNW) is pleased to present this report titled "Geotechnical <br /> Engineering Study, Colby Short Plat, 7008 and 7010 Colby Avenue, Everett, Washington". <br /> Based on the results of our investigation, the proposed project is feasible from a geotechnical <br /> standpoint. Our study indicates the site is underlain predominately by glacial till deposits. <br /> During our subsurface exploration completed on May 15, 2018, groundwater seepage was not <br /> encountered at the test pit locations. However, it is our opinion the contractor should be <br /> prepared to respond to discrete zones of groundwater seepage during construction. <br /> The proposed residential structures can be constructed on conventional continuous and spread <br /> footing foundations bearing on competent native soil, recompacted native soil, or new structural <br /> fill placed directly on competent native soil. In general, competent native soil, suitable for <br /> support of the new foundations, will likely be encountered beginning at depths of about one to <br /> three feet below the existing ground surface (bgs). Where loose or unsuitable soil conditions <br /> are exposed at foundation subgrade elevations, compaction of soils to the specifications of <br /> structural fill, or overexcavation and replacement with a suitable structural fill material, will be <br /> necessary. <br /> Given the cemented nature and relatively high fines contents of the glacial till deposits across <br /> the site, large-scale (or full) infiltration is not feasible from a geotechnical standpoint. Limited <br /> infiltration with incorporation of overflow provisions is feasible from a geotechnical standpoint. If <br /> overflow provisions cannot be incorporated into final design, limited infiltration should not be <br /> considered feasible. <br /> Pertinent geotechnical recommendations are provided in this study. We appreciate the <br /> opportunity to be of service to you on this project. If you have questions regarding the content <br /> of this geotechnical engineering study, please call. <br /> Sincerely, <br /> EARTH SOLUTIONS NW, LLC <br /> Terry J. unn <br /> Staff Geologist <br /> 1805 -136th Place N.E.,Suite 201 • Bellevue,WA 98005 • (425)449-4704 • FAX(425)449-4711 <br />