8920 EVERGREEN WAY THE RESERVE 2025-07-25

DRAFT GEOTECHNICAL ENGINEERING REPORT RESERVE AT EVERETT EVERGREEN WAY AND HOLLY DRIVE EVERETT, WASHINGTON Project No.1117.01 May 1,2013 INTRODUCTION This report documents the surface and subsurface conditions encountered at the site and our geotechnical engineering recommendations for the proposed Reserve at Everett project. The project description, site conditions, and our geotechnical conclusions and design recommendations are presented in the text of this report. Supporting data including detailed exploration logs and field exploration procedures,and results of laboratory testing are presented as appendices. Our geotechnical engineering scope of services for the project included a literature review, site reconnaissance, subsurface exploration, laboratory testing, geotechnical engineering analysis, and preparation of this report. The subsurface evaluation consisted of completing 10 exploratory test pits (designated TP-1 through TP-10). PROJECT UNDERSTANDING Based on our review of a site plan dated March 20, 2013 prepared by Charles Morgan & Associates (project architect),we understand the project will consist of constructing a 177 unit,5 story senior living apartment complex building and associated site improvements. The first floor is planned to have a split elevation with the southeast portion of the first floor at elevation 544.50 and the northwest portion of the first floor at elevation 552.50. The first floor will be buried on the northwest side and daylight to the southeast. The southeast one quarter of the building will be supported on fill with a maximum anticipated thickness of about 3.5 feet above existing site grades. The building is expected to be wood- framed construction supported on shallow concrete spread footings. A concrete slab-on-grade is expected for the first floor level. Grading for the project is expected to consists of cuts with a maximum anticipated depth of about 20 feet and fills with a maximum anticipated thickness of about 3 to 4 feet. A majority of the parking for the tenants will be provided northwest of the building. The parking area will be accessed off of Evergreen Way via a driveway located adjacent to and paralleling the northeast property boundary. A majority of the driveway will require fill and the fill will be supported along a portion of the north side with a 2 to 5 foot tall rockery. Along the southwest property boundary,a 2 to 5 foot tall rockery will be required to support a cut for the northwest parking area and the building. Along the front of the building a 4 to 5 foot tall segmental block retaining wall is proposed to support fill for a plaza area. Stormwater runoff from the site will be managed using a buried concrete vault located northwest of the Page 1