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• <br />TABLE 82A <br />CYPRUS YAMPA VALLEY COAL CORP <br />SUMMARY OF WATER QUALITY DATA <br />STATION NUMBER: 7 --- FOIDEL MINE POND (7) <br /> Average Std Maximm Ninimun Units Count Period <br />SECONDARY <br />COPPER TOTAL -9.434 20.4 70.000 -30.000 UG/L 76 07/79 - 01/87 <br /> TOTAL RECOV 4.167 2.0 8.000 2.000 UG/L 12 08/85 01/87 <br />ZINC TOTAL 121.694 765.8 6520.000 -40.000 UG/L 72 07/79 - 01/87 <br /> TOTAL RECOV 15.714 31.7 150.000 -10.000 uG/L 42 08/85 - 06/96 <br />IRON TOTAL 467.657 2735.5 36000.000 -20.000 UG/L 175 03/79 - 01/87 <br /> TOTAL RECOV 107.619 122.3 570.000 •20.000 UG/L 42 08/85 06/96 <br />MANGANESE DISSOLVED 300.000 0.0 300.000 300.000 UG/L 7 05/88 05/88 <br /> TOTAL 176.944 243.1 7600.000 -30.000 UG/L 143 03/79 - 01/87 <br /> TOTAL RECOV 597.200 416.0 1610.000 178.000 UGJI 15 05)88 - 06/96 <br />TRACE METALS <br />BORON DISSOLVED 256.667 47.3 310.000 220.000 UG/L 3 07/86 - 01/87 <br /> TOTAL 3551.212 13205.1 65000.000 -100.000 UG/l 33 07/79 - 02/85 <br />MOLYBDENUM TOTAL -161.622 162.8 70.000 -500.000 UG/L 37 07/79 - 01/87 <br /> TOTAL RE[OV -23.333 19.5 -10.000 -50.000 UG/L 15 05/88 - 06/96 <br />NUTRIENTS <br />NITROGEN AMNIUM-TOTAL 0.669 0.4 1.140 0.050 MG/L 15 05/88 - 06/96 <br /> AMMIA-FREE -0.003 0.0 0.032 -0.050 MG/L 19 07/79 - 06/96 <br /> NITRATE 1.690 2.7 8.100 -0.020 MG/L 18 07/86 - 06/96 <br /> NITRITE 0.014 0.0 0.090 -0.010 MG/L 5 07/86 - 06/96 <br /> N03+N02 7.887 5.9 21.200 -0.020 MG/L 73 07/79 - 06/96 <br />PHOSPHATE ORTHO-DISS 0.529 0.9 4.900 -0.020 MG/L 55 07/79 - 06/96 <br />Report Date: 27-FEB-97 Page: 3 of 3 <br />Report Name: WDA020R <br />