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DRAFT The following paragraphs provide a description of the materials encountered and a discussion of the groundwater conditions at the site. a. FIELD SURFACING Borings B-1 through B-5, B-7, and B-11 were advanced in the natural turf field located at the western limits of the site (Wilcox Family Field) and encountered grass turf at the ground surface underlain by an approximately 2- to 5-foot-thick drainage layer consisting of sand and pea gravel. Borings B-6 and B-8 through B-10 were advanced along the north and south perimeters of the synthetic turf field located at the northeastern limits of the site (Bob Kilkenny Field) and encountered about 1.5 inches of synthetic turf at the ground surface underlain by an approximately 8-inch-thick drainage layer consisting of open- graded crushed rock, which is underlain by a nonwoven geotextile fabric. b. FILL Fill consisting of sand and silt were encountered beneath the field surfacing in borings B- 5, B-7, B-9, and B-11 and extends to depths of about 7 feet to 8 feet below the ground surface. The sand fill is typically brown, fine to coarse grained, and has a varying silt content ranging from some silt to silty. The relative density of the sand fill ranges from very loose to loose. The silt fill is typically dark brown to dark gray and contains trace to some sand and clay and scattered or a trace of gravel. Organic odors and scattered wood debris were observed in some samples of the silt fill. The relative consistency of the silt fill ranges from medium stiff to stiff. The natural moisture content of the sand and silt fill ranges from about 22% to 35%. It should be acknowledged that variations in this soil unit may be present that are not reflected in this description or the attached boring logs. In this regard, although not observed in the borings, our experience indicates that more significant amounts of wood debris may be present in the fill. c. GRAVEL and COBBLES (Alluvium/Possible Fill) Gravel and cobbles were encountered beneath the field-surfacing materials and fill soils that mantle the site and extend to depths of about 15.8 feet to 24 feet below the ground surface. Based on our review of historical aerial photographs and our experience in the project area, we anticipate regrading of the site could have occurred during previous phases of development and on-site soils could have been used as fill. In this regard, some of the gravel and cobbles may consist of reworked native soils, although obvious indications of fill were not observed during our investigation. For this reason, the gravel and cobbles will be referred to as "alluvium/possible fill" with the understanding that the upper portion of the unit may be fill and the bottom portion is likely undisturbed alluvium. The gravel and cobbles are typically subrounded to rounded and contain a variable sand and silt content ranging from some sand to sandy and trace to some silt. Although not GRI #6497-A - 2.MO Indoor Football Practice Facility Page 4 August 26, 2021