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TABLE 28A <br />CYPRUS YANPA VALLEY COAL CORP <br />SUMMARY OF HATER QUALITY DATA <br />STATION NUMBER: 301 --- TROUT LREEK ABOVE MIDDLE (301 <br />ANIONS <br />BICARBONATE AS HC03 <br />CARBONATE AS C03 <br />HYDRO%IDE AS ON <br />CHLORIDE NOT APPLICABLE <br />SULFATE NOT APPLICABLE <br />PRIMARY <br />Average Std Maximum Mininun Units Count Period <br />151.568 50.2 224.000 0.000 MG/L 31 07/87 - 09/96 <br />3.792 5.6 14.000 -2.000 MG/L 24 07/90 - 09/96 <br />-2.000 0.0 -2.000 -2.000 MC/L 8 06/95 - 09/96 <br />0.500 2.1 2.000 -1.000 MG/L 2 04/93 - 09/93 <br />169.324 120.4 702.000 23.000 MG/L 34 07/87 - 09/96 <br />CADMIUM TOTAL RECOV -0-406 1.0 0.600 -5.000 UG/L 32 07/87 - 09/96 <br />MERCURY TOTAL RECOV -0.138 0.1 0.200 -0.200 UG/L 32 07/87 - 09/96 <br />SELENIUM TOTAL RECOY -0.750 0.8 3.000 -1.000 UG/L 32 07/87 - 09/96 <br />SILVER TOTAL RECOV -1.013 3.5 0.200 •20.000 UG/L 32 07/87 - 09/96 <br />SECONDARY <br />ZINC TOTpI RE[OV 22.581 45.7 220.000 -10.000 UG/L 31 07/87 - 09/96 <br />IRON TOTAL 430.000 0.0 430.000 430.000 UG/L 7 09/93 - 09/93 <br /> TOTAL RECOV 587.273 618.6 3080.000 90.000 UG/L 33 07/87 - 09/96 <br />MANGANESE DISSOLVED 78.636 28.2 120.000 -70.000 UG/L 22 02/87 - 06/88 <br /> TOTAL 20.000 0.0 20.000 20.000 UG/L 7 09/93 - 09/93 <br /> TOTAL RECOV 47.618 31.4 760.000 10.000 UG/L 55 01/87 - 09/96 <br />iRALE METALS <br />MOLYBDENUM TOTAL RECOV -30.000 20.3 -70.000 -50.000 <br />UG/L 32 07/87 - 09/96 <br />Report Date: 11-MAR-97 Page: 2 of 3 <br />Report Name: NOA020R <br />