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_i <br /> ; <br /> � <br /> DAVID L.NELSON ANO ASSOCIATES, INC. <br /> Consulling Lnginccring Gculogy <br /> September 28, 1�84 <br /> • Project No . 788� <br /> Page three <br /> The basal glacial �soils consist of grey, dense , poorly sorted , <br /> silty sand with gravel, considered glacial till, and grey-brown I <br /> uedium dense to dense , poorly sorted silty sand with gravel , !� <br /> considered glacial drift or weathered glacial till. The grey- ! <br /> brown strata overlies the denser grey till throughout the site ��I <br /> area, although the thickness of the weathered strata appears to i <br /> : thin toward the northwest, where the basal dense till is closer <br /> to grade . The weathered zone consists of more gravelly and <br /> sandy materia.l toward the south, indicating the potential occur- <br /> rence of glacial outwash materials within this area. Relative <br /> compactness of the glacial soils was found to be somewhat le�s <br /> within the weathered soils �f the southern portion of the site . <br /> Surficial soils encountered around the site area generally I <br /> ranged from 0.5' of black _.00se organic topsoil to at least I <br /> 4.5 ' of intermixed loose ar•tificial fill. Generally within the <br /> central to northern portiori of the site , the surficial soils <br /> consisted of 2' to 2.5� of brown loose to mediwn dense silty <br /> sand with gravel and roots overlain by Oo$' to 1 ' of black loose <br /> organic topsoil. Some local areas of�thicker surficial fill <br /> were observed (TP-10 and TP-13) within this area. Surficial <br /> artificial fill was found to occur primarily within the southern <br /> portion of the site . (see TP-1 through TP-3 and TP-16) This <br /> appears due to past earthwork or development of the areao where <br /> site levelling was performed. The fill material ranged from a <br /> loose black and brown organic intermixed material to a relativel,v <br /> granular sand. Generally, it was found that the suriicial fill <br /> overlied the old sur��ace soils (topsoil) and was generally. non- <br /> uniform in nai:ure . <br /> Hydrologic Conditions <br /> Ground water was only ouserved within bcrings performed within <br /> the southez•n por�tion oi the sii;e . (see TB-1 through TB-3) The <br /> w�ter was generally res�tricted to the weatered or more granular <br /> soils directly overlying the basal dense glacial till, creating <br /> . �. I <br /> I <br /> � <br /> � <br />