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<br /> <br />-a- <br />strength characteristics, oeneabilitis arr_9 settl^ment potential. <br />Results of additional laborator}~ testirl; are sho.m or, Fi~is. 16 through <br />43 and suatnarize•' on Tables I and II. Prsults c`_ the initial testing <br />program were presenter in our previous report. <br />PPOF•OSCD EyJP.i'.Ot: APG1± <br />The prorca•ad borrow arua for ?oral C;~ari~caent 1 is loo=te:: ~,rithin <br />Year 1 excavation area as shocm on Fits. 1 :na 2. This area is roughly <br />divided into two dissi~~ilar subsoil stratific=lions and serarate•l by a <br />prominent drainage area. ifie north area t~oically consists of a <br />variable, 0 to 1G-foot, depth of stiff, slightly sandy clays overlying <br />• very hart: sandstone bedroc: tq the maximu<r: decth investigated, 20 feet. <br />The uprpr clays are typically of mediw~~ to hi•Th plasticity with silt <br />and clay portion generally greater than 80~ and exhibit :~~crate shear <br />strength characteristics and lea ceneability ~tential when ecmr=_cte:l. <br />the underlying sandstone is fine to medium-Trained arr9 very hard. <br />Jointing and fractures appear to be mainly confined within *he up*rr <br />few feet where refusal to light duty bac~hoe equipment rras exTMaricnced. <br />Topsoil depth in this area is approximately 1 to 2 feet and vegetation <br />consists of relatively light grass and brush. <br />The south excavation area is typically covered with 2 to 3 feet <br />of topsoil and highly organic clay and ap?roximately 3 to 6 feet of <br />slightly sandy clay underlain by •.re~thered to cumrp tent cl~ystone <br />bedrock with minor interbedded sandstone and siltstone layers. <br />• Occasional croal seams were also encountered. 'The u^ner clay soils are <br />generally of medium plasticity with silt and clay crontent generally <br />greater than 808 and exhibit mderate shear strength characteristics <br />