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TABLE 16 CYPRUS YAMPA VALLEY COAL CORPORATION; FOIDEL CREEK MINE 1995 ANNUAL HYDROLOGY REPORT HYDROLOGY MONITORING DATA • ! SITE: WELL 006-AZ-3 DATUM 6749.57 Field,:~"::~.:.~~.~~::~;;~:~~~;::~;~':~:;-~;~~::~~::::':'::~:.~~~~ OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP P..aeameters:::~:::.:':.;.:.:::.::::~~:.~<:.:'DA7E-~:: 10/27/94 11/21/94 12/30/94 01/18/95 02/16/95 03/31/95 04/25/95 05/11/95 06/06/95 07/12/95 08/02/95 09/04/95 Water Depth Iitl ~ 8.500 8.300 7.900 7.900 7,900 No acces 7.400 5.490 5.740 8.130 7.940 8.790 Elevation Ift above msl) 6741.07 6741.27 6741.67 6741.67 6741.67 6742.17 6744.08 6743.83 6741.44 6741.63 6740.76 Temperature (C°1 11 8 5 6 6 No acces 8 9.4 9.4 12.1 11 13.3 Conductivity lumhos/cml 1390 1290 1270 1440 1070 No acces 1110 1480 1510 1360 1440 1490 pH 8.5 8.2 8.0 8.0 7.9 No acces 8.0 7.2 7.4 7.4 7.6 7.0 ~ar3if1,aEeFS:~:~:~.:.~.~~~~.~.:'.:'~~:::::~~'~~~'~~:;~::.'r:::: ~~:'~:;::.:..: . ~~ ~ Conductivity @ 25 C° (umhoslcml 1390 1310 1340 1390 Total Alkalinity Img/II 355 338 320 352 Hardness as CaC03 lmgll) 438 438 532 Solids, total dissolved Img/II 960 889 910 980 Bicarbonate as HC03 Img/II 426 405.6 384 422.4 Carbonate as C03 Img/II -2 -2 -2 -2 Sulfate Img/II 450 400 430 440 Calcium, dissolved Img/II 110 103 102 724 Magnesium, dissolved Img/II 48 44.1 44.6 54 Sodium, dissolved Img/II 140 138 134 130 SAR in Water 2.9 2.82 2.48 Cadmium, dissolved lug/II -0.5 -0.5 -0.5 -0.3 Lead, dissolved lug/II -20 -20 -20 -20 Mercury, dissolved lug/II -0.2 -0.2 -0.2 -0.2 Selenium, dissolved lug/II -1 -1 -1 -1 Iron, dissolved lug/II 320 300 690 400 Manganese, dissolved (ug/II 130 132 138 150 Molybdenum, dissolved lug/l) -10 -10 -10 -10 Nitrogen ammonia Img/II -95 0.93 0.92 2.5 Nitrate as N, dissolved Img/II 0.10 0.1 2 0.21 Nitrate/Nitrite as N Img/II 0.47 0.1 D 0.12 0.26 Phosphorus, ortho diss (mg/II -0.005 -0.005 -0.005 0.128