1004 BROADWAY EVCC STUDENT HOUSING - REPORTS & FINAL DOCUMENTS 2017-01-13

Geotechnical Report - _ __ : ised Proposed Apartments: 1002, 1006, and 1008 Broadway Street, Everett, Washington May 12, 2015 3.3 SOIL CONDITIONS For a detailed description of the subsurface conditions encountered at each exploration location, please refer to our boring logs provided in Appendix A. The stratigraphic contacts indicated on the boring logs represent the approximate depth to boundaries between soil units. Actual transitions between soil units may be more gradual or occur at different elevations. The descriptions of groundwater conditions and depths are likewise approximate. The following is a generalized description of the soils encountered in the borings. Topsoil: At our boring locations, we encountered 6 to 12 inches of topsoil coinprised of loose, silty sand with organics. The topsoil was characterized by its dark brown color, loose consistency, ancl the presence o1� abundant roots and organic debris. This soil layer is not considered suitable for support of foundations, slab-on- grade floors, or pavements. In addition, it is not suitable for use as structural fill, nor shoLild it be mixed with materials to be used as structural fill. Fill: At the locations of Hand Augers HA-2 and HA-3, we encountered a surficial layer of fill overlying the native soil. This fill consisted of silty sand with gravel containing organics consisting of topsoil. The lill ranged from 1'/z to 2'/z feet thick Vashon Till (Qvt): Underlying the topsoil and fill at the locations of HA-2 and HA- 3, we encountered medium dense to very dense silty fine to medium sand with gravel which we classified as Vashon TiIL The upper approximately two to three feet of the till uilit was weathered and mediunl dense. The till gradeci to dense to very dense at two to three feet below grade. All of our borings encountered refusal in very dense glacial till at 6 to 8 feet below grade. Our subsurface descriptions are based on the conditions encountered at the time of our exploration. Soil conditions between our exploration locations may vary from those encountered. The nature and extent of variations between our exploratory locations may not become evident until construction. If variations do appear, PanGEO should be requested to reevaluate the recommendations in this report and to inodify or verify them in writing prior to proceeding with earthwork and construction. i 5-o4s i oos 13road�vay, tzev�sed Page 4 PanGEO, lne.