3003 W CASINO RD BLDG 40-56 Geotech Report 2018-01-02 MF Import

Based on our knowledge of the site and a review of previous geotechnical information, we understand that the existing fill soils were obtained from original site grading and subsequent construction activities. The majority of the fill material is a silty Send till soil with some gravel and a mixture of logs, branches, wood fragments, organic soils and construction debris. The fill is random in nature and was placed without compaction except for a narrow zone along the southern portion of the expansion area. The presence of relatively small voids and occasional cobbles and boulders have been reported during previous investigations and construction activities. At the time of this investigation, the ground surface of the expansion area was relatively flat. Grades varied from elevation about 545 at the South and to about 535 at the north end. The site is presently covered with asphalt pavement and used at a parking area. Perimeter Road passes the north out corner of the site. We understand that underground Sanitary and storm sewer lines exist near the eastern boundary and underground tanks and lines exist at the southwest portion of the site. 4.2 SUBSURFACE CONDITIONS The subsurface conditions are depicted by 4 Soil profiles shown on Plates 3 to 6. In general, the subsurface conditions consist of a loose to dense random fill underlain by very dense glacial till and/or outwash. The thickness of the fill ranged from approximately 15 to 50 feet at the � South and and 20 to 115 at the north end of the proposed expansion arse. The fill thickness generally increases in a northerly direction. The pattern seems to conform to the prodevelopment contours (see Plate 2) that contain two northerly ravines. The fill is a mixture of Send and silt with varying amounts of gravel, cobbles, boulders and pockets of organic Soils, wood and construction debris. Loose soils an found in pockets rather than layers and are generally encountered in the middle portion of the fill. Organic rich Soils were encountered in Borings B-2, B-3, B-4 and B-9 at various depths. Similar to the loose soils, the organic rich Soils are also found in sporadic pockets. The organic rich soil is typically a 4-005.00695.01ASSOW700.ew 006".509.016 4