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<br />TABLE: 13 <br />COLORADO YAMPA COAL COMPANY: MINE 1, 2 AND ECKMAN PARK MINE <br />1999 ANNUAL HYDROLOGY REPORT <br />WATER QUALITY MONITORING DATA <br />SITE: 06AW2 (We11006-AW-2) <br /> <br />DATUM = 6672.18 <br />CATEGORY PARAMETER ANALYSIS TYPE UNITS OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br />FIELD MEASURES DATE 10/19/96 11/6/98 72/8/98 1/19/99 2/24/99 3/22/99 4/19/99 5/70/99 6/74/99 7/19/99 8/23/_99 9/8/99 <br /> WATER ELEVATION FT 6665 6665.06 6665.14 6666.01 6667.02 6668.06 6667.5 6667.81 6665.34 6664.27 6664 89 6664.84 <br /> WATER LEVEL FT 7.18 7.12 7 041 6 17 5.16 4.12 4 66 4.36 6 84 7.91 7.29 7.34 <br />PHYSICAL PROPERTIES TEMPERATURE FIELD DEGREES C 11.5 9.6 9.6 5.3 5.4 5.4 6.4 7.6 12.1 10.7 15.4 73.8 <br /> CONDUCTIVITY FIELD _ UMHOS/CM r 2820 7290 2110 1820 1610 1070 850 1380 1670 2020 23201 2340 <br /> LAB UMHOS/CM _ 2220 1230 1400 1860 <br />i PH FIELD PH _ <br />7.84 7.76 7.87 6.27 8 05 6 17 8.48 8 04 8 27 8 7 8.29 8.32 <br /> LAB PH 6.9 7.7 8 7.2 <br />1 ALKALINITY TOTAL MG/L 141 _ 200 202' _ 119 <br /> HARDNESS AS CAC03 MG/L 662 368 428 ~ 762 __ <br /> SOLIDS TOTAL-DISS MG/L 1640 830 1010 1940 <br />CATIONS CALCIUM DISSOLVED MG/L 85.5 59.9 53.8 114 <br /> MAGNESIUM DISSOLVED MG/L 109 53.2 71.5 116 <br /> SODIUM DISSOLVED MG/L 295 135 _ 190 279 _ <br /> <br />SAR <br />NOT APPLICABLE <br />UNDEFINED <br />5.05 <br />3.1 <br />4.04 <br />4.45 _ <br />ANIONS BICARBONATE AS HC03 MG/L _ 172 244 246' 146 <br /> CARBONATE AS C03 MG/L <2 <2 <2 <2 <br /> HYDROXIDE AS OH MG/L <2 <2 <2 <2 <br /> SULFATE NOT APPLICABLE MG/L 1180 440 _ 590 1150 <br />PRIMARY CADMIUM DISSOLVED UG/L <.5 <.5 < 5 <.5 <br /> LEAD DISSOLVED UG/L <40 <40 <40 <40 <br /> MERCURY DISSOLVED UG/L <.2 ~ < 2 <.2 _ <.2 <br /> <br />SELENIUM <br />DISSOLVED <br />UG/L <br />< 1 <br />< 1 <br />< 1 <br />< 1 _ <br />SECONDARY IRON DISSOLVED UGIL 400 0.38 130 1 4280 <br /> MANGANESE DISSOLVED UG/L 300 169 102 526 <br />TRACE METALS MOLYBDENUM DISSOLVED UGIL < 20 < 10 < 10 < 10 <br />NUTRIENTS NITROGEN AMMIUM-TOTAL MG/L <br />~ 2.5 0.01 0.03 2.95 <br /> AMMIA-FREE MG/L _ _ <br />0.04 12 1.88 0.22 <br /> NITRATE MG/L 0.35 0.09 0.08 0.07 <br /> NITRITE MG/L 0.02 <,01 <.01 0.16 <br /> N03+N02 MG/L 0.37 0.09 0.08 0.23 <br /> PHOSPHATE ORTHO-DISS MG/L 0.008 < 005 <.005 0.038 <br />I \EMENVIRONMENTALNHRUB89~GYLQTABLES\99Welb tls <br />13WPM~NlSIW <br />