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Inwood 10 LLC <br />Project B14-08413 <br />December 3, 2014 <br />Page 4 <br />complex glacial and post-glacial depositional environments, geologic origins can be difficult to ascertain. <br />A detailed investigation of the geologic history of the site was not performed. <br />B.2.Geologic Profile <br />The types of soils encountered in the borings are described below. The soils are generally described in <br />the order they were encountered; i.e., beginning at the ground surface. Please reference the Logs of <br />Borings attached in the Appendix for additional details. <br />B.2.a.Topsoil <br />Topsoil was encountered at the surface at our boring locations with thicknesses of about 8 inches to <br />1 foot. The topsoil encountered by our soil borings consisted of lean clay with sand. <br />In soil borings 1 through 5 and 9 performed by AET nearest the commercial development, a “plow zone” <br />layer was encountered at the surface. This layer had a thickness of 2 feet and the soils encountered were <br />similar to the topsoil encountered in our soil borings. We noted the depth of soils that were interpreted <br />to have the organic contents high enough that they were estimated to impact structural properties of the <br />soil. <br />B.2.b.Glacial Deposits <br />The borings we performed encountered glacial deposits beneath the topsoil consisted predominately of <br />silty sands and silty clayey sands with lesser amounts of poorly graded sand, poorly graded sand with silt, <br />clayey sand, and lean clay with sand. The penetration resistances recorded in the cohesionless (sand) <br />soils varied from 4 to 47 blows per foot (BPF), indicating a very loose to dense relative density. The <br />penetration resistances recorded in the cohesive (clay) deposits varied from 8 to 38 BPF, indicating a <br />medium to hard consistency. Some of the higher blow counts are likely due to gravel. <br />The glacial deposits our soil borings encountered are consistent with the soils AET encountered. One <br />difference is that our glacial outwash sands were generally classified as alluvial soils by AET. Also of note <br />is that in AET borings 1 and 5 a layer of soft clay was encountered. <br />B.2.c.Groundwater <br />Water was encountered in soil boring ST-4 at approximate elevation 991. Based on the moisture contents <br />of the geologic material beneath this elevation, it does not appear our soil boring penetrated the <br />hydrostatic groundwater surface but instead encountered perched deposits of groundwater trapped in