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i&I <br />•E ENGINEERING <br />It should be realized that the explorations utilized for this evaluation reveal subsurface conditions only <br />at discrete locations across the project site and that actual conditions in other areas could vary. In <br />addition, the nature and extent of any such variations would not become evident until additional <br />explorations are performed or until construction activities have begun. If significant variations are <br />observed at that time, we may need to modify our conclusions and recommendations contained in this <br />report to reflect the actual site conditions. <br />Table 1. Approximate Locations, Elevations, and Depths of Explorations. <br />Exploration <br />Functional Location <br />Surface Elevation <br />(feet( <br />Termination Depth <br />(feet) <br />HB-01 <br />NW corner of the site <br />121 <br />4 <br />HB-02 <br />NE corner of the site <br />122 <br />4 <br />HB-03 <br />Mid -point of the site <br />123 <br />8 <br />HB-04 <br />SW corner of the site <br />(Proposed Amphitheater) <br />125 <br />4 <br />Elevation datum: Snohomish County PDS GIS Map <br />3.2 SITE GEOLOGY <br />General geologic information for the project area was obtained by reviewing the Geologic map of the <br />Marysville Quadrangle, Snohomish County, Washington (Minard, 191 Based on review of the geologic <br />map, the primary geologic unit in the vicinity of the site is Vashon Till (Geologic Map Unit Qvt). Vashon <br />Till consists of an unsorted mixture of clay, silt, sand, gravel, and boulders (diamicton) that has been <br />directly deposited by a glacier. It includes lenses of stratified material, particularly near its base. Till has <br />been glacially overridden and is typically dense to very dense. <br />3.3 SOIL CONDITIONS <br />The enclosed exploration hand boring logs in Appendix A provide a detailed description of the <br />encountered soil strata. Our on -site explorations revealed fairly uniform near -surface soil conditions and <br />confirmed the mapped stratigraphy of Fill material over Vashon Till deposits. Generally, our explorations <br />encountered approximately 4 feet of fill material mixed with construction concrete debris from 2019 <br />Index Hall demolition work (Images 3a and 3b). <br />2 https;Hngmdb.usgs.gov/Prode c/proddesc_1416.htm <br />MP ENGINEERING, PLLC MPGEOTECH.COM 5 <br />