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r <br /> r... <br /> [I <br /> N) \\N \,,. <br /> `,,, <br /> August 23, 2017 ` <br /> Polygon Northwest Company <br /> 11624 SE 5`h Street, Suite 200 <br /> Bellevue, WA 98005 <br /> Attention: Michelle Dittman <br /> Building 19 Summary Letter <br /> Geotechnical Construction Observation Services <br /> Everett Riverfront Eclipse Site <br /> Everett, Washington <br /> GeoDesign Project: Polygon-128-03 <br /> 3511 3151 Drive(Permit No. C1602-020) <br /> 3513 31st Drive(Permit No. C1602-021) <br /> 3515 315` Drive(Permit No. C1602-022) <br /> 3517 315t Drive(Permit No. C1602-023) <br /> 3521 3151 Drive (Permit No. C1602-024) <br /> This letter provides a summary of GeoDesign, Inc.'s geotechnical construction observation <br /> services for Building 19 of the Everett Riverfront Eclipse Site in Everett, Washington. GeoDesign <br /> prepared a geotechnical report for this project' that summarized the site conditions and <br /> provided our geotechnical recommendations. We received a set of building construction plans <br /> for the project that were prepared by Core Design and dated July 2015. <br /> Members of our geotechnical staff visited the site on a periodic basis between May 2015 and <br /> November 2016 to perform the following tasks: <br /> • Observe the placement of structural fill and evaluate the compaction of the fill by conducting <br /> in situ density and moisture content measurements and by observing proof rolling <br /> • Observe the placement of surcharge material and install settlement markers <br /> • Monitor the surcharge settlement <br /> • Observe the installation of ground improvement trenches <br /> • Evaluate the compaction of the building subgrade by conducting in situ density and moisture <br /> content measurements and hand probing <br /> 'GeoDesign,Inc.,2017. Report of Geotechnical Engineering Services;Everett Riverfront Eclipse Site;Everett, Washington, <br /> dated March 16,2017. GeoDesign Project: Polygon-128-01 <br /> 9450 SW Commerce Circle,Suite 300 I Wilsonville,OR 97 503.968.8787 www.geodesigninc.com <br /> 6P,, <br />