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• ~ 15A <br /> CYPRUS YAMPA VALLEY COAL CORP <br /> SUMMARY OF NATER DUALITT DATA <br /> STATION NUMBER: 06AY1 --- 006-AY -1 <br /> Average Std Maximm Minimm Units Count Period <br />PHYSICAL PROPERTIES <br />TEMPERATURE FIELD 9.317 3.7 20.000 3.000 DEGREES C 126 01/85 - 09/95 <br />CONDUCTIVITY FIELD 1064.492 762.4 5180.000 410.000 UMHOS/CM 126 01/85 - 09/95 <br /> LAB 839.457 403.7 2390.000 443.000 UMNOS/CN 35 01/87 - 08/95 <br />PH FIELD 7.671 0.4 8.800 6.700 PH 125 02/85 - 09/95 <br /> LAB 7.567 0.3 7.800 7.300 PH 3 07/86 - 01/87 <br />ALKALINITY IOTAL 278.7&. 64.0 430.000 194.000 MG/L 37 07/86 - 08/95 <br />HARDNESS TOTAL 511.977 457.9 2336.000 212.000 NG/L 44 01/85 - 08/95 <br />SOLIDS DISSOLVED 864.864 923.5 4592.000 260.000 MG/L 44 01/85 - 08/95 <br /> SUSPENDED 2142.000 0.0 2142.000 2142.000 MG/L 1 06/91 - 06/91 <br />CATIONS <br />CALCIUM DISSOLVED 113.574 102.1 520.000 47.000 MG/L 43 01/85 - 08/95 <br />MAGNESIUM DISSOLVED 56.288 50.6 252.000 23.000 MG/L 43 01/85 - 08/95 <br />SODIUM DISSOLVED 101.037 124.1 609.000 18.600 MG/L 43 01/85 - 08/95 <br />SAR NOT APPLICABLE 0.590 0.2 0.933 0.430 UNDEFINED 26 03/92 - 08/95 <br />ANIONS <br />BICARBONATE AS NC03 336.217 80.0 525.000 221.000 MG/L 47 01/85 - 08/95 <br />CARBONATE AS C03 1.816 5.6 14.000 -2.000 MG/L 11 02/91 - 08/95 <br />HYDROKIDE 0.S OH -2.000 0.0 -2.000 -2.000 MG/L 3 03/95 - 08/95 <br />CHLORIDE NOT APPLICABLE 11.333 6.1 18.000 6.000 MG/L 3 01/85 - OS/85 <br />SULFATE NOT APPLICABLE 396.688 620.4 2930.000 40.000 MG/L 48 01/85 - 08/95 <br />Repor[ Date: 20-MAR-96 Pege: 1 of 3 <br />Report None: NDA020R <br />V <br />