1004 BROADWAY EVCC STUDENT HOUSING - PUBLIC WORKS 2017-01-13

Geotechnical Report - Revised Proposed Apartments: 1002, 100b, and 1008 Broadway Street, Everett, Washington May 12, 2015 3.3 SOIL CONDITIONS For a deiailed description of the subsurface conditions encauntered 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 rnay 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 comprised of loose, silty sand with organics. The topsoil was characterized by its dac-k brown colot•, loose consistency, and the presence of 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 should it be mixed w�th materials to be used as structural fili. 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. Thc fill ranged from 1'/2 to 2%2 feet thick Vashon Till (Qvt): Underlying the topsoil and fill at the locations of HA-2 and I-iA- 3, we encountec-ed medium de3ise 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 unit was weathered and medium dense. The till graded to dense to very dense at two to three feet below grade. All of oui• borings encountered refusal in very dense glacial till at 6 to 8 feet below grade. Our subsurface desci•iptions are based on ihe conditions eiicauntered at the time of our exploratio�i. Soil conditions between our exploration locations may vary fi•om those encountered. The nature and extent of variations between our explaratory locations may not become evident until construction. If variations do appear, PanGEO should be requested to reevaluate the recommendations in this report and to modify or verify them in �vriting piior to proceeding with earthwork and construction. IS-O�lfi IOOF 13rot�d�cay, Rcvucd i�a�TE' 4 }��il�i�U, �nC.