10312 EVERGREEN WAY SONIC Geotech Report 2023-05-25

Geotechnical Engineering Report 1 January 8,2021 Glint Car Wash and Sonic Everett,Everett,Washington RGI Project No.2020-643-1 1.0 Introduction This Geotechnical Engineering Report (GER) presents the results of the geotechnical engineering services provided for the proposed Glint Car Wash and Sonic Everett project in Everett, Washington. The purpose of this GER is to assess subsurface conditions and provide geotechnical recommendations for the construction of a Glint car wash, coffee shop, and Sonic restaurant. Our scope of services included field explorations, laboratory testing, engineering analyses, and preparation of this GER. The recommendations in the following sections of this GER are based upon our current understanding of the proposed site development as outlined below. If actual features vary or changes are made, RGI should review them in order to modify our recommendations as required. In addition, RGI requests to review the site grading plan, final design drawings and specifications when available to verify that our project understanding is correct and that our recommendations have been properly interpreted and incorporated into the project design and construction. 2.0 Project Description The project site is located at 10312 Evergreen Way in Everett, Washington. The approximate location of the site is shown on Figure 1. The site is a paved parking lot. RGI understands that a Glint Car Wash, a coffee shop, and a Sonic restaurant will be constructed at the site. Our understanding of the project is based on a Site Plan prepared by Terraforma Design Group, LLC dated October 15, 2020. RGI anticipates that the proposed buildings will be supported on perimeter foundation with a series of columns or structural slab. RGI expects that the perimeter wall loading will be 1 to 2 kips per linear foot and maximum column load will be up to 50 kips. Slab-on- grade floor loading of 250 pounds per square foot (psf) are expected. Minor site grading will be needed to reach the final grade. 3.0 Field Exploration and Laboratory Testing 3.1 FIELD EXPLORATION On December 15, 2020, RGI observed the drilling of eight borings. The approximate exploration locations are shown on Figure 2. Field logs of each exploration were prepared by the geologist who continuously observed the drilling. These logs included visual classifications of the materials encountered during drilling as well as our interpretation of the subsurface conditions between samples. The Corporate Office 17522 Bothell Way Northeast Bothell,Washington 98011 Phone 425.415.0551• Fax 425.415.0311 www.riley-group.com