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• <br />v.. <br />TABLE 1 <br />Yampa Valley Coal Company <br />Selected 1986 ti+ater Quality Data <br />• <br /> 75% of No. <br />Parameter Units Np, Standard Exceeding Standard <br />Arsenic, Tot ug/L 141 4 5 5 <br />Arsenic, TR ug/L 79 4 5 5 <br />Lead, Tot ug/L 137 19 32 25 <br />Lead, TR ug/L B7 19 12 25 <br />Copper, Tot ug/L 211 17 26 22 <br />Copper, TR uglL 167 17 8 22 <br />Molybdenum, Tot ug/L 136 8 2 10 <br />Molybdenum, TR ug/L 57 8 1 10 <br />No. <br />Exceeding <br />5 <br />1 <br />15 <br />6 <br />13 <br />b <br />2 <br />1 <br />L J <br />