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<br />TABLE: 10 <br />COLORADO YAMPA COAL COMPANY: MINE 1, 2 AND ECKMAN PARK MINE <br />1999 ANNUAL HYDROLOGY REPORT <br />WATER QUALITY MONITORING DATA <br />SITE: 08AV2 (We11008-AV-2) <br /> <br />DATUM= 6677.1 <br />CATEGORY PARAMETER ~LYSIS TYPE UNITS OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP <br />FIELD MEASURES DATE 10/19/98 11/10/98 12/8/98 1/11/99 2/24/99 3/19/99 4/15/99 5/6/99 6/21/99 7!7/99 8/20/99 9/22/99 <br /> WATER ELEVATION FT 6666.78 6666.81 666663 6666.68 666691 6667.26 6671.67 6669.06 fi66814 6666.61 6667.69 <br /> WATER LEVEL FT 10.32 10 29 10.47 10 42 10.19 9.84 5.43 8.04 8.96 10.49 9.41 <br />PHYSICAL PROPERTIES TEMPERATURE FIELD DEGREES C 11.2 7.4 9 4 6.5 6 6.7 4.6 6 3 8.8 11.1 12.1 <br /> CONDUCTIVITY FIELD UMHOSICM 1660 1740 1590 1580 1540 1520 1400 1550 1430 1800 1710 <br /> LAB UMHOS/CM 1500 I 1720 1690 1530 <br /> PH FIELD PH 7.5 754 7.69 7.52 7.78 7.71 8.16 7.9 7.76 7.76 7.63 <br /> <br />ALKALINITY LAB <br />TOTAL PH <br />MG/L 7.4 <br />386 7.5 <br />352 7 4 <br />330 <br />~ 7.1 <br />364 <br /> HARDNESS AS CAC03 MG/L 859 020 829 870 <br /> SOLIDS _ TOTAL-DISS MG/L __ 1330 1340 1300 1450 <br /> <br />CATIONS <br />CALCIUM <br />DISSOLVED <br />MG/L <br />201 <br />193 <br />196 <br />208 _ <br /> MAGNESIUM DISSOLVED MG/L 86.7 82 824 85.2' <br /> SODIUM DISSOLVED MG/L 91.8 _ 93.6 _ 96.7 _ 97.6 <br /> SAR NOT APPLICABLE UNDEFINED 1.38 144 1.48 1.461 <br />ANIONS BICARBONATE AS HC03 MG/L 47_1 429 402 445 <br /> CARBONATE ~AS C03 <br />HYDROXIDE AI SOH MG/L <br />MG/L _ <2 <br /><2 <2 <br /><2 <2 <br /><2 <2 <br /><2 <br /> SULFATE NOT APPLICABLE MG/L 650 660 660 660 <br />PRIMARY CADMIUM DISSOLVED UG/L < 5 <.5 <.5 < 5 <br /> LEAD DISSOLVED UG/L _ <40 <80 <40 90 <br /> MERCURY (DISSOLVED UG/L < 2 I <.2 _ <.2 <2 <br /> SELENIUM DISSOLVED UG/L < 1 i < 1 < 1 < 1 <br />SECONDARY IRON DISSOLVED UGIL 190 130 160 1460 <br /> MANGANESE DISSOLVED UG/L 1670 262 977 1650 <br />TRACE METALS MOLYBDENUM DISSOLVED UG/L I < 10 < 20 < 10 < 10 <br />NUTRIENTS NITROGEN _ <br />AMMIUM-TOTAL MG/L 1.25 ~ <.01 <.01 0.02 <br /> AMMIA-FREE MG/L <.01 _ <br /><.OS 0.15 1.13 <br /> NITRATE MG/L 0.05 I 0.11 0.021 0.08 <br /> NITRITE MG/L 001 ~- 001 <.Ot 0.02 <br /> N03+N02 MG/L 0.06 0.12 0.02 01 <br /> PHOSPHATE ORTHO-DISS MG/L 0.013 0.016 0.013 0.012 <br />'Equipment Failure, associatetl sample was collected at OBAV1 <br />I \EIfENVIRONMENTALKHRtl999~LYCCITABLE5W9Welb tls <br />1]'09 PM - Bl3Sg0 <br />