8525 EVERGREEN WAY BURGER KING 2021-05-10

EI ON GEOTECHNICAL ```� ASSOCIATES, INC. GECTECHNICAL ENGINEERS fit GEOLOGISTS Main Office Engineering-Geology Branch 17311—135th Ave NE,A-500 5526 industry Lane,#2 Woodinville,WA 98072 East Wenatchee,WA 98802 (425)486-1669•FAX(425)481-2510 (509)665-7696-FAX(509)665-7692 August 2,2017 Mr.Ryan Ellinghaus 2812 Architecture 2812 Colby Avenue Everett,WA 98201 Geotechnical Engineering Evaluation Evergreen Way Burger King Restaurant Development 8525 Evergreen Way Everett,Washington NGA File No. 998317 Dear Mr.Ellinghaus: We are pleased to submit this report titled "Geotechnical Engineering Evaluation — Evergreen Way Burger King Restaurant Development — 8525 Evergreen Way — Everett, Washington." This report documents our surface and subsurface explorations within the site, and provides general recommendations for future site development. Our services were completed in general accordance with the agreement which was authorized by you on June 22, 2017. The irregularly-shaped property is situated on relatively level ground and encompasses an area of approximately 0.98 acres southeast of Evergreen Way and northwest of Holly Drive. The property is currently occupied by an abandoned, single-story restaurant structure, with the remaining portion generally being covered with asphalt pavement. Project plans consist of removing the existing structure and constructing a new restaurant structure with a slab-on-grade within the central-northern portion of the property, along with associated underground utilities and paved parking throughout the property. Specific grading, utility, or stormwater management plans were not available at the time this report was prepared. We therefore should be retained to review final development plans as they become available. We performed three geotechnical borings using a truck-mounted drill rig in the vicinity of proposed areas of potential development. Our explorations generally encountered surficial fill underlain by silty fine to medium sand soils at depth which we interpreted as native glacial till deposits at relatively shallow depths throughout the site. Based on our site reconnaissance and explorations, we have concluded that development on this site should be feasible from a geotechnical standpoint. We recommend that the new structure be founded on the medium dense or better native glacial soils for bearing capacity and settlement considerations. These soils were generally encountered at approximately 2.0 to 3.0 feet below the existing ground surface, based on our explorations. We should note that localized areas of deeper unsuitable soils and/or undocumented fill could be encountered at this site and exposed at the proposed foundation subgrade elevations depending on final site grading and development plans. These unsuitable soils would likely be associated with previous grading activities and/or the installation of the existing utilities within the vicinity of the property. This condition would require additional excavations in foundation, slab, and pavement areas to remove the unsuitable soils.