4201 RUCKER AVE COMMUNITY HEALTH CENTER 2019-04-10

Geotechnical Engineering Report 2 May 25,2017 Central Everett CHC,Everett,Washington RGI Project No.2017-094 4.0 Site Conditions 4.1 SURFACE The site is an irregular shaped parcel of and land and located at 4201 Rucker Avenue in Everett, Washington. The site is bound to the north by 42nd Street Southeast, to the east by an alley way and Hoyt Avenue, to the south by a commercial building, and to the west by Rucker Avenue. The site is occupied by a three-story clinic building in the northern portion of the site, with associated parking areas in the southern and southeastern portions of the site. An alley extends through the site, with the southeastern parking area on the other side of the alley. The site slopes generally east to southeast but is relatively flat, with less than five feet of elevation change across the site. The southeastern parking area has paved access drives that descend to Hoyt Avenue along the eastern property line, and the paved alley begins to descend to the south near the southern property line. The property is mostly paved, with decorative shrubs located in planter areas and around the building perimeter. Three large pine trees are located along the eastern property line in the southeastern parking area. 4.2 GEOLOGY • Review of the Geologic Map of The Everett 7.5—Minute Quadrangle, Snohomish County, Washington by James P. Minard, etc (1985) indicates that the soil in the project vicinity is mapped as advance outwash (Map Unit Qva), which is stratified sand and gravel deposited by meltwater streams issuing from the advancing Vashon glacier. These descriptions are generally similar to the native soils encountered in the upper 20 feet of our borings during field exploration. The silt soils encountered below 20 feet match the descriptions for the underlying transitional beds (Map Unit Qtb) which is silt and clay deposited in lakes and streams prior to and during the early stages of the last glacial advance. 4.3 Soils The site is underlain by up to 10 feet of medium dense sand with some silt and silty sand with trace gravel over dense to very dense silty sand with trace gravel and sand with some silt and very stiff to hard silt with varying amounts of sand. More detailed descriptions of the subsurface conditions encountered are presented in the explorations included in Appendix A. 111 I 1 RILEYGROUP