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January 3, 2025 <br />HWA Project No. 2021-159-21 <br />Geotechnical Engineering Report 7 HWA GEOSCIENCES INC. <br />Port Gardner Storage Facility <br />• Shannon & Wilson, 2014, Geotechnical Evaluation of Kimberly-Clark Site Integrated <br />Planning Grant Support Services, Everett, Washington, dated March 3, 2014, prepared <br />for Moffatt & Nichol Engineers <br />• Aspect Consulting, 2013, Data Report for Independent Phase 2 ESA, K-C Worldwide <br />Site Upland Area, Everett, Washington, dated March 2013 <br />• Dames and Moore, 1995, Geotechnical Investigation, Converting Plant Addition Scott <br />Paper Company Plant, Everett, Washington, dated January 19, 1995, prepared for Jacobs- <br />Sirrine Engineers, Inc. <br />• Chas T. Main, Inc., 1952, Paper Mill Addition, Preliminary Site Survey Test Boring <br />Data, dated July 17, 1952, prepared for Scott Paper Company Soundview Division, <br />Everett, WA <br />Sources of information obtained and reviewed for this project are listed in the reference section <br />of this report. Copies of pertinent boring logs are provided in Appendix D. <br />3.0 SITE CONDITIONS <br />3.1 SURFACE CONDITIONS <br />The site is located on Port Gardner Bay, east of Puget Sound, west of West Marine View Drive, <br />and immediately south of Naval Station Everett in Everett, Washington. The site is an <br />approximately 11-acre L-shaped property that extends about 800 feet west from West Marine <br />View Drive and extends about 400 feet in the north-south direction. The site is relatively level, <br />with less than 5 feet of topographic relief across the site. The project site is improved with a <br />parking lot, chemical storage structures, water treatment facilities, and associated infrastructure. <br />3.2 SITE GEOLOGY <br />The project alignment is located within the Puget Lowland, which has periodically been <br />occupied by continental glaciers that developed during the recent ice ages of the Quaternary <br />Period. Between and following these glacial advances, the Puget Lowland was partially filled <br />with alluvium (stream channel) and lacustrine (lake) sediments deposited by runoff from the <br />western slopes of the Cascades and the eastern slopes of the Olympics. <br />The most recent deposits consist of fill placed to modify the ground surface. It is HWA’s <br />understanding that most of the site was formerly offshore and was built by hydraulically placing <br />fill to expand the shoreline. This fill is interbedded with layers of fresh to decomposed wood <br />waste.