711 112TH ST SE 7 ELEVEN Geotech Report 2018-01-02 MF Import

Subsurface Ezploration and Proposed 7-Eleven Propem• Geatechnical 6ngineering Reparr Everetr, WruhinR�on Projecr and Site Conditions 2.0 PROJECT AND SITE DESCRIPTION This report was completed with an understanding of the project based on a site plan prepared by Loveli-Sauerland & Associates with topographic information, dated November 16, 1994, provided to us by the client. We understand that the property consists of two parcels that will be developed in two phases. Phase I will consist of developing the southern parcel into a 7- Eleven retail foad store and gas station with asphalt paving. The 7-Eleven building will consist of a single-story, concrete masonry unit (CMU) structure with a concrete slab-on-grade floor. The building will occupy the northeast portion of the south parcei. Six pump stations will be located at a canopicd pump island in the central portion of the parcel with access drives Gom both 112'h Street SE and 7'" Avcnae SE. Phase 11 will consist of developing a two-story office building and asphalt parking in the western half of the northern parcel. The office building is anticipated to consist oF wood-frame construction with a slab-on-grade Floor. The eastern half of the northern parcel will utilize the existing lower topography to be developed into a storm water pond. The subject property was locat�d in the northeast quadrant uf the intersection at 112'" Street SE and 7'" Avenue SE in Everett, Washington. Single-family residences bordered the north properry line and multi-family housing bordercd the east properry line. Nonh Creek is located west of the retail strip mall observed on the west side of 7'" Avenue SE. Except for the northeast portion oF the property, the site was (lat duc to previous grading. The existing site elevatiou in the southcrn half of the property matched the bordering roads but increased up to approximately 5 feet above the road ele��ation of 7ih Avenue SE towards the north. The previously filled ground surtace sloped down approximately 6 feet to a drainage ditch, with wa�er flowing wesnvard into a culvert under 7'" Avenue SE. Fiil slopes on the order o( 8 fect high also bordered the western and southern portions of the wet area. Water �vas also observed ro ilow into the wet area from d�e north and into an existing storm warer conveyance system, which crosseJ the northwest and western areas of the properry. The flat, graded area of the sitc was void of major vegetation; however, the lowcr, northeast portion of thc property contained a stand of aldcr trecs bordered by blackberry vines. 3A SUI3SURI'ACf G`CPLORATION Our field study included excavating five exploration pits to gain shallow soil and ground water information. The various types of sediments, as well as the depths where characteristi�s of the sediments changed, or where ground water was encountered, are indicated nn the exploration logs presented in the Appendix. The dcpths indicated on the logs where canditions changed ,tfn�eh 19, ?00l ASSOCIATED E.�RT1i SC1E.�'Cf5 SXII'� � Kh_'ti14t,P.A/ . D rtPPmpU-0/ - lCA Pas� 2 �1