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• TABLE 4 <br />Yampa Valley Coal Company <br />Selected Mater Quality Data <br />Discharge Sites <br />(7, 39, 99, 109, 113, 114, Spoil Springs) <br /> 75Y of No. <br />Parameter Units No. Mean Max. Standard Exceedinq Standard <br />Arsenic, Tot ug/L 152 2.2 25 5 10 4 <br />A~sen~c- TR ug/L 33 T.6 20 5 T 4 <br />Lead, Tot ugjL 101 31 300 19 >31 25 <br />Lead, TR ug/L 42 22 50 19 >7 25 <br />Copper, Tot ug/L 374 11 290 l7 57 22 <br />Copper, TR ug/L 198 6 50 17 9 22 <br />• <br />No. <br />Exceedinq <br />5 <br />f <br />12 <br />5 <br />38 <br />6 <br />~~ <br />