902 PINE ST NORTH SOUND BEHAVIORAL HEALTH TREATMENT CENTER 2025-11-04

I B-1 741 Marine Drive Bellingham,WA 98225 360 733_7318 _ GeOleST Arlington, Avenue 8 ..1_ 6f Arlington,Avenue 98223 888 251_5276 360 733.7418 I November 16, 2018 Job No. 18-0770 Snohomish County Facilities Management I 3300 Rockefeller Avenue Everett, Washington 98201 Attn: Mr. Jeff Hencz Re: North Puget Sound Behavioral Health —Treatment Center Addition I 2801 10th Street Everett, Washington 98201 Dear Mr. Hencz, I As requested, GeoTest Services, Inc. (GTS) is pleased to submit this report summarizing I the results of our geotechnical engineering investigation for the above-referenced project. The purpose of this evaluation was to establish general subsurface conditions beneath the site from which conclusions and recommendations for project design could be formulated. Specifically, our scope of services included the following tasks: I • Exploration of soil and groundwater conditions underlying the site by conducting a total of four hollow-stem auger exploratory borings in the project vicinity. I • Laboratory testing on representative samples in order to classify and evaluate the engineering characteristics and infiltration potential of the soils encountered. I • Provide this written report containing a description of the general geologic conditions, subsurface soils and groundwater conditions. Also presented in this report are our findings and recommendations pertaining to site preparation and I earthwork, fill and compaction, wet weather construction and seismic design considerations. Included within these recommendations is a discussion of post- I construction settlement, slab-on-grade construction, drainage, resistance to lateral loads, temporary and permanent slopes, utilities, geotechnical consultation and construction monitoring. IPROJECT DESCRIPTION The subject property is currently occupied by the Denney Juvenile Justice Center campus. IGTS understands that there are plans to construct a building addition to this existing campus. The proposed area of addition is currently developed with driveway access, automobile parking, and landscape features. The parcel is approximately 9-acres in size 1 and is located in an urban setting within the City of Everett, Washington (Vicinity Map, Figure 1). The new addition is anticipated to be a two-story building and is to contain conventional perimeter or spread footings, slab-on-grade floors and steel framing I elements. GTS was provided conceptual site plans by the Snohomish County Facilities Management prior to the composition of this report. GTS had not been provided with structural loads, but it is expected that the building loads will be light to moderate. I Page 1 of 17