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HR Green, Inc. <br />Project B2204225 <br />October 3, 2022 <br />Page 5 <br /> <br /> <br />Table 1. Subsurface Profile Summary <br />Strata <br />Soil Type – <br />ASTM <br />Classification <br />Range of <br />Penetration <br />Resistances Commentary and Details <br />Pavement <br />section --- --- <br />ƒ Encountered at the surface of Borings ST-5, ST-6, <br />and ST-12. <br />ƒ Overall thickness ranges from 11 to 14 inches. <br />ƒ Bituminous thickness 3 to 4 inches. <br />ƒ 8 to 10 inches of concrete was encountered <br />below the bituminous. <br />ƒ Apparent aggregate base is 8 to 10 inches where <br />encountered. <br />Topsoil fill SM, SC, CL --- <br />ƒ Predominantly silty sand (SM). <br />ƒ Dark brown to black. <br />ƒ Variable thickness, not present at all borings. <br />ƒ Thicknesses at boring locations varied from about <br />1/4 to 1 1/2 foot. <br />ƒ Moisture condition generally moist. <br />Fill SM, SC, CL 1 to 11 Blows Per <br />Foot (BPF) <br />ƒ General penetration resistance of 2 to 6 BPF. <br />ƒ Moisture condition generally moist. <br />ƒ Extended to depths ranging from 2 feet to the <br />termination depth of 6 feet. <br />ƒ Highly variable, soils intermixed. <br />ƒ Variable gravel content. <br />ƒ Possible cobbles and boulders. <br />Glacial <br />deposits CL 7 to 8 BPF <br />ƒ Encountered below the fill within Borings ST-9 <br />and ST-12. <br />ƒ Variable amounts of gravel; has the potential to <br />contain cobbles and boulders. <br />ƒ Moisture condition generally moist. <br /> <br /> <br />We did not perform gradation analysis on the apparent aggregate base material encountered as part of <br />the pavement section, in accordance with our scope of work. Therefore, we cannot conclusively <br />determine if the encountered material satisfies a particular specification. <br /> <br />For simplicity in this report, we define fill to mean existing, uncontrolled or undocumented fill. <br /> <br /> <br />38