3003 W CASINO RD BLDG 40-404 2018-01-01 MF Import

I ` Berkley Structures, Inc. E-3592 October 20, 1987 Page 3 property is roughly rectangular, with a triangular portion compri- sinq the east eide, enclosing a total of about twelve (12) acres. The property is a gently rolling glacial tilt upland. Major changes in the topography are found in the northwest building corner and the steep cliffs along the northeast property edge. The property is located along the southwest edqe of a large borrow pit. The vertical cliffs ranqe in he�ght from about forty-one (41) to ona hundred (100) feet above the pit floor. The property continues to slope up from the top of the clif�, at a qra�ient of about 4: 1 (Nori2ontal:Vertical) to the east end of the proposed buildinq area. This portion of the proposed buildinq has been partially qraded as a part of the pit operations to the northeast. An odd shaped mound is located at the northwest buildinq corner. A north-south trendinq wetland appears to be located near the west property line. The north property line is near an area that appears to be a portion of the aP�}acent pf.t that has been filled in. Site vegetation consists of small alders and brush. Occasional evergreen trees are scattered over the property. Subsurface The site was explored by excavating thirteen (13) test pits at the approximate locations shown on Plate 2. Please refer to the Test Pit Loqs, Platea 6 through 17, for a detailed description of the conditions encountered at each location explored. More detailed descriptions of our field exploration and laboratory testinq proqrams are included in the appendix to this report. The following is a qeneralized description of the subsurface conditions en- countered. In gener�l, subsurface soil conditions consist of about six inches tu twp and one-half feet of forest duff, topaoil and topsoil fill. Tlie average thickness of the topsoi] and duff is about one foot. Below the topsoil is a red brown to liqht brown ailty fine to medium Band vhich is about one ko two feet in thickness. Beneath this, and exttnding to depth, is a very dense light brown to gray silty fine to madium � sand with a little gravel. We have described this as e ql.aclal till or "hardpan" . We estimate the glacial till is abouL twenty-five (25) to sixty (60) feet thick. According to the exposures in the pit to the northeast, the t11! caps very dense eands and qravels. In the northeast building corner ar�aa, our exploratory excavations encountered a gray and brown loose to medium dense silty fine to medium sand fill. our test pits (Test Pits TP-7 through TP-9) were unable to penetrate this fill in sF�ite of reaching depths on the Earth Consullents, �nc.