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TABLE: 14 COLORADO YAMPA COAL COMPANY: MINE 1, 2 AND ECKMAN PARK MINE 1999 ANNUAL HYDROLOGY REPORT WATER QUALITY MONITORING DATA SITE: 26SP7 DATUM = 7119.61 CATEGORY PARAMETER ANALYSIS TYPE UNITS OCT NOV DEC JAN FEB MAR APR MAY JUN T JUL AUG SEP FIELD MEASURES DATE _ 11/6/98 ~ 3/18/99 5/11/99 I _ 8/19/99 WATER ELEVATION ! FT 7050.67 __ _ 1 7050.87 7 51.25 0 7051.02 WATER LEVEL j _ FT 68.74 ~ 68.74 __ _ 68.36 68.59 PHYSICAL PROPERTIES TEMPERATURE FIELD DEGREES C _ 11.4 ~ __ 10.6 10.7 12.8 _____ CONDUCTIVITY ( FIELD UMHOS/CM 3460 2080 _____ 2800 ___ ____ _ 3740 S LAB UMHOS/CM _ i 2940 3720 PH ( FIELD PH 6.69 _ _ 691 ! 6.65 6.89 LAB PH I ~ ~ 6.8 ALKALINITY _ TOTAL MG/l __ _ 719 717 HARDNESS _ AS CAC03 MG/L _ ___ 2460 ~ 2550 SOLIDS TOTAL-DISS MG/L i 3520 - 3830 CATIONS CALCIUM DISSOLVED MG/L _ I _ 481 ~ 495 MAGNESIUM DISSOLVED MG/L j 305 ~_ __ 320 SODIUM DISSOLVED MG/L ~ _ 83.6 __ 76 SAR NOT APPLICABLE UNDEFINED 0.74 I 0.66 ANIONS BICARBONATE AS HC03 MG/L j 877 ~ 875 CARBONATE AS C03_ MG/L ___ < 2 ~ < 2 HYDROXIDE AS OH MG/L < 2 ___ c 2 SULFATE NOT APPLICABLE M_G/L ~ ~ 1950 ~ 2030 PRIMARY CADMIUM DISSOLVED UG/L ; __ <.5 < 51 LEAD _ DISSOLVED UG/L ; ___ i <40 <2001 MERCURY DISSOLVED UG/L ~ <,2 <.2~ SELENIUM DISSOLVED UG/L ' < 1 < 1 SECONDARY IRON DISSOLVED UGIL ~ i < 20 _ < 2p~ MANGANESE DISSOLVED UG/L _ 1780 _ 1900 TRACE METALS MOLYBDENUM DISSOLVED UG/L _ j < 10 < 20! NUTRIENTS NITROGEN AMMIUM-TOTAL MG/L _ <.01 _ <.01 AMMIA-FREE MG/L _ 0.14 <.O5 NITRATE MG/L 5.7 ~- 8.6 NITRITE MG/L _ I _ <.p1 <,01 N03+N02 MG/L I 5.7 8.6 PHOSPHATE ORTHO-DISS MG/L - 0.01 <.005 I.~EN\ENVIROHMENTALWIR\I999~GYCC\TABLES\99Welb da 13.09 PM - NRS~00