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BLUE RIBBON COAL COMPANY <br /> PIEZOMETER P-5 <br /> 0 <br /> -2 <br /> -4 <br /> -6 <br /> _g <br /> -10 <br /> u- <br /> w -12 <br /> -14 <br /> -16 <br /> a <br /> -18 <br /> w <br /> o -20 <br /> -22 <br /> -24 <br /> -26 <br /> -28 - — -� <br /> -30 <br /> 6/89 7/89 8/89 9/89 10/89 11/89 12/89 1/90 <br /> DATE <br />