1001 N BROADWAY 2020 EVCC 2025-10-03

2.2. Laboratory Testing Soil samples obtained from the borings were transported to GeoEngineers' laboratory and evaluated to confirm or modify field classifications, as well as to evaluate engineering properties of the soil. Representative samples were selected for laboratory testing consisting of moisture content, fines content (material passing the U.S. No. 200 sieve), and grain size distribution. The tests were performed in general accordance with test methods of the American Society for Testing and Materials (ASTM) and other applicable procedures. A description of the laboratory testing and the test results are presented in Appendix B. .3. Previous Studies We also reviewed logs of available explorations from previous studies in the project area. Logs of explorations from previous projects referenced for this study, are,presented in Appendix C, Previous Explorations, and the locations are shown on Figure 2. 3.0 SITE CONDITIONS 3.1. Surface Conditions The LRC building is located at the College Plaza site and is located in the asphalt-paved parking lot east of Broadway Avenue, southwest of the Washington State University Academic Center building, and north of the existing retail strip mall buildings. The site slopes down from about Elevation 430 feet on the north side of the proposed building to about Elevation 415 feet,on the south side of the proposed building. Most of the site is covered by as paved .parking areas and associated landscape islands. Small deciduous trees and shrubs exist throughout the site 'iii the landscape islands. Several underground utilities are located on the site. The layout of the existing site features and proposed LRC are shown in Figure 2. 3.2. Geology Published geologic information for the project vicinity includes a United States Geological Survey(USGS) map of the Marysville quadrangle, Snohomish County, Washington (USGS 1985). The typical geologic soil profile (youngest to oldest) in the project vicinity is recessional outwash overlying glacial till, overlying advance outwash deposits. Mapped soils in the immediate project vicinity consist of glacially consolidated Vashon Till deposits (glacial till). Glacial till is typically overlain by younger recessional outwash deposits that can be sandy'or clayey, and underlain by older glacial advance outwash that is typically granular in nature. Recessional outwash deposits (Marysville Sand Member and Clay Member) are not mapped in the immediate project vicinity, but sometimes overly the glacial till unit. The clay member of the recessional outwash has been encountered in other nearby areas shown in the referenced geologic map. This unit is mapped as a subset of the more granular Marysville Sand Member of the recessional outwash. The clay member of the recessional outwash is described as small areas of silt and clay that are remnants left isolated on the till by erosion. Glacial till is generally a non-sorted, non-stratified mixture of sand, gravel and silt that has been overridden by several thousand feet of ice. It typically has high shear strength, low consolidation and low GEOENGINEER� 1uly22,2079 Paget