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TABLE 15 CYPRUS YAMPA VALLEY COAL CORPORATION; FOIDEL CREEK MINE 1995 ANNUAL HYDROLOGY REPORT HYDROLOGY MONITORING DATA SITE: WELL 006-AY-1 DATUM 6827.99 Fieltl.:~:~:.::: ~::~:'~~::~~~::::~~::;:: ~~~~ ~::~~~~~~~~'~~~~~ OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP Parametes~.~;.;~;~~.~~~:~~~.~~:;~;~~ti~~: ~~~~~~:;:D.ATE~~-:~ 10/27/94 11/21/94 12/29/94 01/18/95 02/16/95 03/30/95 04/26/95 05/11/95 06/07/95 07/10/95 08/01/95 09/05/95 Water Depth Iftl 4.200 3.700 Frozen Frozen Frozen 3.800 3.600 4.470 4.650 6.180 6.180 7.340 Elevation Ift above msll 6823.79 6824.29 6824.19 6824.39 6823.52 6623.34 6821.81 6821.81 6820.65 Temperature IC°) 12 9 Frozen Frozen Frozen 6 10 8.8 9 12.9 12.4 12.8 Conductivity lumhos/cml 1020 890 Frozen Frozen Frozen 530 660 650 680 740 940 800 pH 7.8 7.8 Frozen Frozen Frozen 8.1 8.0 7.2 7.1 7.1 7.6 7.4 Gab ::::: ?:...:':: "::::::.::;.` .` :::: ' .::::-::'.'.' ::;' :: Conductivity @ 25 C° lumhos/cml ----- 638 696 873 Total Alkalinity Img/II ----~ 292 325 397 Hardness as CaC03 Img/II ----- 353 356 447 Solids, total dissolved Img/II ----- 360 400 500 Bicarbonate as HC03 Img/II ----- 350.4 390 476.4 Carbonate as C03 Img/II ----- -2 -2 -2 Sulfate Img/II ----- 40 70 80 Calcium, dissolved Img/II ----- 75.1 74.8 94.8 Magnesium, dissolved Img/II ----- 40.3 41.1 51 Sodium, dissolved Img/II ----- 78.6 19 21 SAR in Water ----- 0.44 0.44 0.43 Cadmium, dissolved lug/II ----- -0.5 -0.5 -0.5 Lead, dissolved lug/II ----- -20 -20 -20 Mercury, dissolved lug/II ----- -0.2 -0.2 -0.2 Selenium, dissolved lug/II ----- -1 -1 -1 Iron, dissolved lug/II ----- 210 320 120 Manganese, dissolved lug/II ----- 1520 1860 2380 Molybdenum, dissolved lug/II ----- -10 -10 -10 Nitrogen ammonia (mg/II ----- 0.10 0.17 0.12 Nitrate as N, dissolved Img/II --~-- 0.05 -0.02 0.08 Nitrate/Nitrite as N Img/II ----- 0.05 -0.02 0.08 Phosphorus, ortho diss Img/II ----- -0.005 -0.005 0.008 -- No data