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C <br /> TABLE SA <br /> CYPRUS YAMPA VALLEY COAL CORP <br /> SUMMARY OF VATER OUALI TY DATA <br /> STATION NUMBER: 087758 --- 008 -77-58 <br /> Average Std Maximm Minimum Units Count Period <br />TRACE METALS <br /> ALUMINUM DISSOLVED -180.000 491.9 700.000 -400.000 UG/L 5 03/81 - 04/83 <br /> BORON DISSOLVED 301.429 221.7 500.000 -100.000 UG/L 7 03/80 - 04/83 <br /> MOLYBDENUM DISSOLVED -59.130 60.4 -10.000 -300.000 UG/L 23 03/81 - 09/96 <br /> TOTAL RECOV -10.000 0.0 -10.000 -10.000 UG/L 1 09/90 - 09/90 <br />NUTRIENTS <br /> NITROGEN AMMIUM-TOTAL 1.920 1.9 5.700 -0.020 MG/L 10 10/83 - 09/90 <br /> AMMIA-FREE 0.025 0.0 0.111 -0.001 MG/L 11 03/81 - 09/90 <br /> NITRATE 0.160 0.4 1.850 -0.020 MG/L 20 10/86 - 09/96 <br /> NITRITE -0.012 0.0 -0.010 -0.020 MG/L 5 10/86 - 09/96 <br /> N03+N02 0.851 2.0 9.000 -0.100 MG/L 49 06/79 - 09/96 <br /> PHOSPHATE ORTHO-DI SS 0.102 0.2 0.620 -0.020 MG/L 33 03/80 09/96 <br />C <br />Report Date: 26-FEB-97 Page: 3 of 3 <br />Report Name: VOA020R <br />