1986-12-31_REPORT - C1981008 (3)

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Table 8 (Cont. ) Comparison of Upstream (Site SW-N1) and Downstream (Site SW-N3) Water Quality on Tuttle Draw During 1980-1981 and 1985-1986, Nucla Mine, Montrose County, Colorado Mean Value for June-September Mean Value for November-February 1980 1985 1980-1981 1985-1986 Parameters SW-N1 SW-N3 SW-N1 SW-N3 SW-N1 SW-N3 SW-N1 SW-N3 Copper, Total (ug/1 ) 20.00 20.00 20.00 20.00 20.00 20.00 Fluoride (mg/1 ) 0.79 0.86 0.59 0.71 0.81 0.91 0.97 0.95 Hardness (mg/1 ) 675.00 1257.75 621.00 1280.00 957.00 1816.00 1155.00 2191.00 Iron, Total (mg/1 ) 0.20 0.28 1.50 0.46 0.37 0.65 0.21 0.41 W Iron, Diss. (mg/1 ) 0.03 0.04 0.02 0.02 0. 11 0.13 0.02 0.02 Lead, Total (ug/1 ) 20.00 20.00 20.00 30.00 20.00 20.00 Magnesium (mg/1 ) 89.25 151.50 64.00 150.00 134.00 226.67 144.00 260.00 Manganese, Total (mg/1 ) 0.10 0.24 0.22 0.43 0.42 0.94 Manganese, Diss. (mg/1 ) 0.17 0.41 0.36 1.00 0.33 0.78 Mercury, Total (ug/1 ) 0.02 0.02 0.02 0.20 0.20 0.20 Molybdenum, Total (ug/1 ) 200.00 200.00 50.00 50.00 50.00 50.00 Nitrogen, Ammonia (mg/1 ) 0.12 0.13 0.06 0.09 0.10 0.12 0.06 0.10 Nitrogen, Nitrate (mg/1 ) 0.82 0.83 0.02 0. 12 1.00 1.00 0.13 0.07 Oil and Grease (mg/1 ) 0.50 0.50 pH @ 25°C 8.30 7.89 8.27 7.94 7.87 7.61 8.02 7.81 Phosphorus, Total as P (mg/1 ) 0.02 0.02 0.06 0.02 0.04 0.06 0.02 0.03 Potassium (mg/1 ) 3.50 5.25 3.00 5.00 4.00 5.33 4.00 6.00