1300 W MARINE VIEW DR WATERFRONT PLACE APARTMENTS Geotech Report 2022-10-25

• Subsurface Soil Conditions GeoEngineers' understanding of subsurface conditions is based on completion of four borings, 21 CPTs and a review of existing geotechnical information for the site and its vicinity.The approximate locations of the previous explorations and the explorations completed as part of this study are presented in Figure 2. The subsurface soil conditions encountered at the site generally consist of fill, recent deposits,and glacially consolidated soils. • The fill was encountered immediately below the crushed rock base course surfacing that was present on much of the two sites.The fill generally consists of loose to very loose sand with variable silt content and extended to depths of up to 26/feet. Interbedded soft silt layers were encountered within the fill. Wood debris ranging in size and consistency from sawdust to timber logs were encountered to depths of up to 26/ feet. We understand that the wood debris is likely from historic mill and shipyard operations adjacent to parcel Nos. A3, A4, and A10. Shell fragments were also consistently encountered throughout the fill between approximately 5 and 25 feet below existing site grades. We understand that the shell fragments are likely a result of dredging that was completed during construction of the port. • The recent deposits were encountered below the fill and generally consist of medium dense sand with variable sand and gravel content.Significant wood debris was not encountered in the recent deposits. The recent deposits are interpreted to be beach deposits and are not interpreted as glacially consolidated soils. ■ The glacially consolidated soils were encountered below the recent deposits and generally consisted of dense to very dense sand with variable silt and gravel content and extended to the depths explored. Glacially consolidated soils are considered competent bearing soils. The average depth to glacially consolidated soils below the proposed buildings is approximately 31 feet. Groundwater Conditions Groundwater conditions were observed during our field explorations.The design groundwater elevation is interpreted to be at approximate Elevation 101 feet (MLLW) or approximate Elevation 8 feet (NAVD88). The groundwater at the site is interpreted to be hydraulically connected to the Puget Sound to the west and will likely fluctuate over time. Bulkhead An existing bulkhead wall is located to the west of the proposed improvements and is shown in Figure 2. Based on review of the Port of Everett Central Marina Improvements Phase 2 plan documents (Reid Middleton 2015),we understand that the average height of the bulkhead wall is approximately 20 feet and is designed for the 200-year seismic event per IBC 2012.Additionally,a new bulkhead is being constructed adjacent to Parcel Nos.A6 and A7.We understand that this bulkhead has been designed for the 2,475-year seismic event per IBC 2012. CONCLUSIONS AND RECOMMENDATIONS • GeoEngineers geotechnical engineering conclusions and recommendations are provided in the following sections of this report. GEOENGINEERS� May31,2017 ` Page3 File No.22360-003-00