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<br />Table 8 (Cont.) <br />Conipar•ison of Upstream (Site SW-N1) and Downstream (Site SW-h'3) <br />Water Quality on Tuttle Draw During 1980-1981 and 1985-1986, <br />Nucla Mine, Montrose County, Colorado <br />Parameters <br />Mean Value for June-September <br />1980 1985 <br />SW-N1 SW-N3 SW-N1 SW-N3 <br /> <br />Mean Value for November-February <br />1980-1981 1985-1986 <br />SW-N1 SW-N3 SW-N1 SW-N3 <br />Copper, Total (ug/1) 20.00 20.00 20.00 20.00 <br />Fluoride (mg/1) 0.79 U.86 0.59 0.71 <br />Hardness (mg/1) 675.00 1257.75 621.00 1280.00 <br />Iron, Total (nig/1) 0.20 0.28 1.50 0.46 <br />Iron, Diss. (mg/1) 0.03 0.04 0.02 0.02 <br />w <br />Lead, Total (ug/1) <br />20.00 <br />20.00 <br />20.00 <br />30.00 <br />Magnesium (mg/1) II9.25 151.50 64.00 150.00 <br />Manganese, Total (mg/1) 0.10 0.24 0.22 0.43 <br />Manganese, Diss. (mg/1) 0.17 0.41 <br />Mercury, Total (ug/1) 0.02 0.02 0.02 0.20 <br />Molybdenum, Total (ug/1) 200.00 200.00 50.00 50.00 <br />Nitro~~n, Ammonia (mg/1) 0.12 0.13 0.06 0.09 <br />Nitrogen, Nitrate (mg/1) 0.82 0.83 0.02 0.12 <br />Oil and Grease (mg/1) <br />pH @ 25°C 8.30 7.89 8.27 7.94 <br />Phosphorus, Total as P (mg/1) 0.02 0.02 0.06 0.02 <br />Potassium (mg/1) 3.50 5.25 3.00 5.00 <br />0.81 0.91 <br />957.00 1816.00 <br />0.31 0.65 <br />0.11 0.13 <br />134.00 226.67 <br />0.36 <br />0.10 <br />1.00 <br />0.50 <br />7.87 <br />0.04 <br />4.00 <br />1.00 <br />0.12 <br />1.00 <br />0.50 <br />7.61 <br />0.06 <br />5.33 <br />20.00 20.00 <br />0.97 0.95 <br />1155.00 2191.00 <br />0.21 0.41 <br />0.02 0.02 <br />20.00 20.00 <br />144.00 260.00 <br />0.42 0.94 <br />0.33 0.78 <br />0.20 0.20 <br />50.00 50.00 <br />0.06 0.10 <br />0.13 0.07 <br />8.02 7.81 <br />0.02 0.03 <br />4.00 6.00 <br />