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Kraus-Anderson Realty Company Project BL-11-01014 March 18,2011 Page 4 the complex glacial and post-glacial depositional environments,geologic origins can be difficult to ascertain. A detailed investigation of the geologic history of the site was not performed. B.2. Geologic Profile B.2.a. Surface A surficial layer of topsoil approximately 1 foot in thickness was encountered at each of the recent boring locations with the exception of Borings ST-102 and ST-104 at the time of this exploration.The topsoil encountered was typically composed of silty sands and clays with varying organic content. B.2.b. Fill Material Beneath the surficial topsoil or at the surface in Borings ST-102,ST-104,ST-105 and ST-107, fill material was encountered to depths ranging from approximately 4 to 10 feet below existing grades. The fill material encountered generally consisted of clays, silty sands,and clayey sands containing varying quantities of gravel.The N-values of the SPT were used to determine the consistency or relative density of subsurface soils.The SPT N-values in the fill material ranged from 6 to 15 blows per foot (BPF). B.2.c. Swamp Deposits Beneath fill material in Borings ST-104 and ST-105, swamp deposited soils were encountered to depths ranging from approximately 15 to 19 feet below existing grades.The swamp deposits encountered generally consisted of organic clays(USCS—OL) and organic silty sands(USCS—SM) containing varying quantities of organic matter and trace gravel.The SPT N-values in the swamp deposits ranged from 1 to 4 blows per foot(BPF) indicating very loose or soft to rather soft conditions. B.2.d. Glacial Deposits Beneath the topsoil in Borings ST-101, ST-103, and ST-106, and beneath fill material in Borings ST-102 and ST-107, and beneath swamp deposits in Borings ST-104 and ST-105,glacially deposited soils were encountered to the planned boring termination depth ranging from approximately 15 to 25 feet below existing grades.The glacial deposits encountered were a mixture of till and outwash soils.The till soils were typically composed of sandy lean clays(USCS—CL)and silts(USCS—ML)while the outwash soils were typically granular in nature composed of poorly-graded sands(USCS—SP). Much of the glacial deposits contained varying quantities of gravel.The moisture contents of selected samples of the glacial soil samples ranged from 19 to 25 percent indicating these soils are likely wetter than their optimum moisture content. BRAUN INTERTEC