1304 80TH ST SW EVERETT SCHOOL DISTRICT 2018-01-02 MF Import

• Subsurface Exploration and Everest Bus Facility Geotechnical Engineering Report Everett, Washington Project and Site Conditions the buildings near the northeast corner of the property, the demolition of a long equipment shed along the west side of the site, and the construction of a large asphalt parking lot. An approximately 10-foot-deep detention vault is to be constructed in the northeast portion of the property. We understand that the building in the northwest corner of the property will remain. No other buildings or structures are planned for this site. The site is located south of 80i° Street SW and north of State Route (SR) 526 in Everett, Washington with commercial tracts to the east and west. There are two commercial buildings on the site along with a long equipment shed along the west edge of the site. Asphalt parking areas were located near the north end.of the site, and gravel-covered parking areas occupied the remainder of the site. The area is nearly flat with less than approximately 2 feet of elevation change across the site based on visual estimates. No topographic data was made available to us. 3.0 SUBSURrACE EXPLORATION Subsurface explorations were performed on October 29, 2003 as part of the original geotechnical report, "Subsurface Exploration, Geologic Hazard, and Geotechnical Engineering Report, New Everett School District Bus Facility," dated November 14, 2003. The original scope of services consisted of six exploration borings on the site. Associated Earth Sciences, Inc. (AESI) performed additional subsurface explorations on November 11, 2005. Our field study included advancing seven additional exploration borings to gain subsurface information about the site and make site-specific recommendations for placement of asphalt pavements. The various types of soils, as well as the depths where characteristics of the soils changed, are indicated on the exploration logs presented in the Appendix. The depths indicated on the logs where conditions changed represent gradational variations between soil types in the field. Our explorations were approximately located in the field by measuring from known site features and are shown on Figure 2. The conclusions and recommendations presented in this report are based, in part, on the exploration borings completed for this study. The number, locations, and depth of the explorations were completed within site and budgetary constraints. Because of the nature of exploratory work below ground, extrapolation of subsurface conditions between field explorations is necessary. It should be noted that differing subsurface conditions may be present due to the random nature of deposition and the alteration of topography by past grading and/or filling. The nature and extent of any variations between the field explorations may not become fully evident until construction. If variations are observed at that time, it tnLy be necessary to re-evaluate specific recommendations in this report and make appropriate changes. November 28, 2005 ASSOCIATED EARTII SCIENCE=S, INC. FClld-F'FO3602B2-"ea$IM6a21KFIWP Page 2