1010 N BROADWAY EVCC 2018-01-01 MF Import

PROPOSED LIBERTY HALL,EVEREIT COMMUNITY COLLEGE_ Everett,Washington SITE CONDITIONS Surface Conditions The proposed building footprint is situated in the existing Triangle parking lot located west of Broadway and south of the Student Health and Fitness Center, and extends west across the north end of the existing Royal Motor Inn. The existing parking lot slopes down from Elevation 92 feet on the south side to Elevation 79 feet on the north side. The overall grade change within the proposed building footprint is about 10 feet from approximately Elevation 91 to 81 feet. The parking lot has several landscape islands and is bordered by Broadway on the east, the Student Health and Fitness Center currently under construction to the north,and the Royal Motor Inn to the west. The Royal Motor Inn is a two-story structure. We understand the motel and parking lot will be demolished as part of the project. Past Site Activities We understand that a portion of the site was occupied by a former gas station with underground fuel storage tanks (USTs). We also understand that the documented USTs were removed and that phase II environmental remediation work is currently being performed by others at the site. The approximate location of the environmental remediation work and removed USTs are shown on the Site Plan,Figure 2;however,the environmental documents for the site should be reviewed. The site was recently developed as the Triangle parking lot as part of the Undergraduate Education Center project (Gray Wolf. Hall). During construction of the parking lot, several areas were overexcavated to remove soft subgrade soils and organic debris and were backfilled with structural fill. The approximate locations and depths of the overexcavated areas are shown on Figure 2. Site Geology Geologic information for the project area (Minard, 1985) indicates that native surficial soils at the site are composed of glacial till, which are underlain by advance outwash deposits and/or Transitional Bed deposits. Glacial till commonly consists of a very compact, poorly sorted, non-stratified mixture.of clay, silt, sand, gravel and cobbles. Glacial till commonly appears gray or blue on a fresh surface,while weathered glacial till may be brown to yellow in color. Till may include large boulders. Advance outwash deposits underlie the glacial till and typically consist of a thick section of mostly clean gray, pebbly sand with gravel. However,fine-grained sand and silt are common in the lower parts of the section and sparingly in the upper part on the unit. Transitional Bed deposits generally underlie the advance outwash but directly underlie glacial till in local areas. Transitional Bed deposits consist of thick beds of stiff to hard clay,silt,and fine sand. Subsurface Conditions Soil Conditions Based on the soil conditions encountered in the borings,the building site is generally underlain by asphalt pavement overlying fill soils, softer native deposits, and native stiff to hard silt. The silt is Page 2 June 10,2010€GeoEngineers,Inc. File No.5836.010.00