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! �� .if !` f� : ►)1 h x� ,',��t_>t ji1.5 Ale No. S-1182-3 <br /> May 31, 1972 <br /> PAGE T140 <br /> e <br /> FIELD EXPLORATIONS <br /> Four test borings were drilled to the groundwater level . <br /> Three of these borings were drilled adjacent to the waste- <br /> water ponds , while the fourth was drilled near Sperry Road <br /> approximately 750 feet from the wastewater ponds . The <br /> assumption was made that this fourth boring would be in an <br /> area not influenced by the wastewater storage, and would <br /> therefore serve as a point of comparison. The locations of <br /> the borings are shown on Plate I . <br /> The borings were drilled to depths varying from 31 to 50 <br /> feet below existing ground surface. A continuous log of the <br /> soils encountered was maintained. Representative, relatively <br /> disturbed samples of the soils were taken. In addition, a <br /> sample of the groundwater from each boring was collected for <br /> laboratory testing. Samples of the plant process water were <br /> also taken by Johns-Manville personnel and furnished to us <br /> for chemical testing. <br /> SOIL CONDITIONS <br /> • The typical soil profile encountered in the borings <br /> includes a surface stratum of dark-brown sandy clay. In <br /> Borings l and 2, drilled on the pond dikes, this is overlain <br /> by dike fill soil. :beneath thedark-brown clay, a stratum of <br /> light-brown silty clay was encountered to an approximate <br /> depth of 20 feet . This soil is in turn underlain by reddish- <br /> brown silty sand which varies from approximately 2, to 7 feet <br />