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TABLE 4A <br />CYPRUS YAMPq VALLEY COAL CORP <br />SUMMARY OF PATER QUALITY DATA <br />STATION NUMBER: 91M006 --- SCOTT PLACE YADGE YELL <br />Average Std Maximum Minimum Units Count Period <br />PHYSICAL PROPERTIES <br />TEMPERATURE FIELD 14.150 2.9 18.000 7.000 DEGREES [ 10 09/91 - 09/96 <br />CONDUCTIVITY FIELD 1852.000 380.3 2540.000 1520.000 UMHOS/CM 10 09/91 - 09/96 <br /> LAB 1786.000 458.9 2780.000 1480.000 UMHOS/CM 11 09/91 - 09/96 <br />PH FIELD 9.046 0.7 9.890 7.900 Px 10 09/91 - 09/96 <br />ALKALINITY TOTAL 779.500 340.3 1620.000 636.000 MG/L B 06/93 - 09/96 <br />HARDNESS TOTAL 15.750 5.7 23.000 8.000 MG/L 8 06/93 - 09/96 <br />SOLIDS DISSOLVED 1132.909 391.2 1996.000 880.000 MG/L 11 09/91 - 09/96 <br />CATIONS <br />CALCIUM DISSOLVED 10.645 21.9 76.000 1.500 MG/L 11 09/91 - 09/96 <br />MAGNESIUM DISSOLVED 8.218 16.7 58.000 1.100 NG/L 11 09/91 - 09/96 <br />SODIUM DISSOLVED 418.636 118.8 740.000 305.000 MG/L 11 09/91 - 09/96 <br />SAR NOT APPLICABLE 42.361 15.3 66.220 17.359 UNDEf INED 10 06/92 - 09/96 <br />ANIONS <br />BICARBONATE AS HC03 616.015 388.7 1459.000 316.000 MG/L 13 09/91 - 09/96 <br />CARBONATE AS C03 137.091 96.8 254.000 0.000 MG/L 11 09/91 - 09/96 <br />HYDROKIDE AS OH -1.333 1.0 0.000 -2.000 MG/L 6 06/93 - 09/96 <br />SULFATE NOT APPLICABLE 255.231 292.6 1083.000 10.000 MG/L 13 09/91 - 09/96 <br />Report Date: 20-FEB-97 Page: 1 of 2 <br />Report Name: YOg020R <br />