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��x <br />ayi <br />y �H <br />� H� <br />� H'Sl <br />CA H <br />�Zp <br />HC <br />��g <br />c� • o <br />t' y � <br />V� y <br />g d� <br />� � t+1 <br />H O C�/� <br />� <br />August 15, 1991 <br />Mr. Bob Norling <br />� <br />G-0126 <br />Page 4 <br />smooth steel rod with a cross bar, was pushed manually into the <br />soil.s on the cut banks to qet indications of the density or <br />stiffness of the soils. The penetration of the probing bar ranged <br />from 2 to 5 inches in the gray cemented silty sand at the base of <br />the west bank, and from zero to 4 inches in the reddish brown layer <br />of silty, gravelly sand except in one place on the south bank wheze <br />a penetration of 12 inches was registered. We helieve that this <br />hiqh penetration was made in a sand zone that lacked the gravel <br />mixture found elsewhere in the same soil unit. The probing bsr <br />penetration in the fill material above the charcoal bedding ranged <br />from 1 to 11 inches. The il-inch penetration was adjacent to a <br />rusting object in the fill. The fill is considered unusually <br />compact as the probing bar penetrations in the fill and in the soil <br />units underlying it did not vary much. <br />Judging from the probing bar penetrations, we believe that the <br />reddish brown, silty, gravelly sand and the gray, cemented, silty <br />sand soil units are probably the weathered till. A fresh, <br />unweathered till should be practically unpenetrable by the probing <br />bar. Our composite logs of the cut banks are included on Plates 1 <br />and 2. For a detailed description of the soils encountered please <br />refer to these logs. <br />aroundwatar <br />Groundwater was not observed in the excavation area. The upper <br />soils on the cut banks were observed to be moistened from surface <br />runoff infiltration. <br />LAHORATORY TEBTIN(i <br />Moisture content determination and particle size analysis were <br />Geo Consultants Inc. <br />s --:� <br />e <br />� <br />