2600 FEDERAL AVE 2021 PORT OF EVERETT 2025-09-29

Substantive Requirements Review Landau Associates 1.0 INTRODUCTION This report summarizes the results of geotechnical engineering services provided by Landau Associates, Inc. (LAI) in support of the Norton Terminal Development and Model Toxics Control Act (MTCA) 3rd Interim Action project in Everett, Washington (site; Figure 1). This report has been prepared with information provided by KPFF Consulting Engineers, Inc. (KPFF; project civil engineer) and the Port of Everett (Port; project owner) and with data collected during LAI's geotechnical field exploration and laboratory testing programs. 1.1 Project Description The Port proposes to redevelop approximately 34 acres of the former Kimberly-Clark (K-C) paper mill site with a marine cargo terminal; existing docks and waterfront features will be preserved for future marine expansion. The Port intends to develop a flexible design that will accommodate such expansion, including construction of marine infrastructure or reuse of the existing barge dock. The initial phase of site redevelopment will include the addition of flexible pavements, light poles, utility corridors, a cargo container containment area, and a washdown area. The site can be accessed via Federal Avenue to the south and Norton Avenue to the north. 1.2 Scope of Services The following geotechnical services were provided in accordance with the scope outlined in the Agreement for Subconsultant Services between KPFF and LAI, dated March 19, 2020, and in Amendments 04a and 06, dated August 27, 2020 and March 1, 2021: • Compiled and reviewed readily available geologic and geotechnical information for the site. • Coordinated the clearance of underground utilities at the proposed exploration locations. • Advanced 11 exploratory borings and collected representative soil samples at select intervals. • Conduct two pavement cores in existing asphalt driveways that currently serve Port tenants in the vicinity a potential secure cargo alley concept to the west of Federal Avenue (at the south end of the site). • Logged the subsurface conditions observed in the borings, including soil sample depths, stratigraphy, soil engineering characteristics, and groundwater occurrence. • Hired a geophysical subconsultant, who performed electrical resistivity tomography (ERT) surveys to evaluate the extent of wood waste deposits at the site. • Completed geotechnical laboratory testing and engineering analyses. • Prepared this report, summarizing the results of the field exploration and laboratory testing programs and presenting geotechnical conclusions and recommendations to support final design of the proposed improvements. This report includes: — Site plans showing the locations of the exploratory borings and ERT surveys. Geotechnical Engineering Report 0121049.040.041 Norton Terminal Development&MTCA 3rd Interim Action 1-1 May 7,2021