3400 RIVERFRONT BLVD Geotech Report 2022-10-25

• • • • During previous phases of the current project and past proposed projects, multiple geotechnical • investigations were performed at the site. We have reviewed the following geotechnical reports • for the site: • Earth Consultants, Inc., 2001. Preliminary Geotechnical Engineering Study; Eclipse Mill • Property; Eclipse Mill Road Near Pacific Avenue; Everett, Washington, dated January 23, 2001. • Prepared for Eclipse Lumber Company. Project No. E-7989 • URS, 2009. Eclipse Mill Road Pipeline Protection Project, Volume 1 of 2, Geotechnical Investigation and Evaluation of Existing Pipelines, dated May 28, 2009. Prepared for the City. URS Project No. 33758986 • • URS, 2009. Eclipse Mill Road Pipeline Protection Project, Volume 2 of 2, Calculation Package, • dated May 2009. Prepared for the City. URS Project No. 33758986 • • Earth Solutions Northwest(ESNW), 2013. Geotechnical Evaluation; Eclipse Neighborhood; 3300 to 3600 Chestnut Street; Everett, Washington, dated May 2, 2013. Report No. ES- 2598.04 • • ESNW, 2015. Boring logs for B-101 through B-103, dated January 2015, and Test Pit logs for • TP-1 through TP-6, dated April 2015. • According to the reports listed above, previous geotechnical investigations at the site have • included the following: • • Earth Consultants, Inc., 2000: excavated 16 test pits (TP-1 through TP-16) • URS, 2007: drilled two soil borings (B-1-07 and B-2-07) • • URS, 2009: drilled seven soil borings (B-1-09 through B-7-09) and vacuum potholed 11 locations • • ESNW, 2013: drilled two soil borings (B-1 and B-2) • ESNW, 2015: drilled three soil borings (B-101 through B-103) and excavated six test pits 41 (TP-1 through TP-6) • • We base our geotechnical evaluation of the site on the data presented in these reports and • accept the professional responsibility for the use and interpretation of the data in developing the conclusions and recommendations presented in this report. • • 3.0 PURPOSE AND SCOPE • • The purpose of this evaluation was to provide geotechnical engineering recommendations for use in design and construction of the proposed improvements. Specifically, we completed the • following scope of services: • Reviewed readily available published geologic data and previous reports for the site furnished • by Polygon for existing information on subsurface conditions in the site vicinity. • Prepared a report for the City that primarily addressed potential settlement at the site. • • Built and installed 16 settlement plates that will be part of a settlement monitoring program. • • Completed a subsurface exploration program that consisted of drilling three borings to • depths of up to 56.5 feet BGS. • • • G EO DESIGN? 2 Polygon-128-01:091615 • •