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•1 • • <br /> TABLE 13A <br /> CYPRUS PAMPA VALLEY COAL CORP <br /> SUMMARY OF WATER QUALITY DATA <br /> STATION NUNBER: ObAW2 --- 006-AW-2 <br />Average Std Maxinun Minimm Units Count Period <br />PHYSICAL PROPERTIES <br />TEMPERATURE FIELD 10.418 4.3 20.000 0.800 DEGREES C 124 11/83 - 07/96 <br />CONDUCTIVITY FIELD 2255.435 743.9 3700.000 598.000 UMHOS/CM 124 11/83 - 07/96 <br /> lA8 2340.944 824.4 3960.000 718.000 UMXOS/CM 36 10/86 - 05/96 <br />PH FIELD 7.324 0.4 8.600 6.400 PH 124 11/83 - 07/96 <br /> LAB 8.000 0.0 8.000 8.000 PH 2 10/86 - 01/87 <br />ALKALINITY TOTAL 313.444 81.2 534.000 185.000 MG/L ib 10/86 - 05/96 <br />HARDNESS TOTAL 997.000 417.2 1948.000 177.000 MG/L 42 11/83 - 05/96 <br />SOLIDS DISSOLVED 2069.023 810.7 3648.000 524.000 MG/L 43 11/83 - 05/96 <br /> SUSPENDED 486.000 0.0 486.000 486.000 MG/L 1 06/91 - 06/91 <br />CATIONS <br />CALCIUM DISSOLVED 206.093 89.2 401.000 33.000 NG/L 43 11/83 - 05/96 <br />MAGNESIUM DISSOLVED 114.028 49.5 230.000 23.000 MG/L 43 11/83 - OS/96 <br />SODIUM DISSOLVED 259.349 91.3 467.000 74.000 MG/L 43 11/83 - 05/96 <br />SAR NOT APPLICABLE 4.313 0.4 4.870 3.548 UNDEFINED 16 03/92 - 05/96 <br />ANIONS <br />BICARBONATE AS HC03 389.488 104.9 651.000 223.000 MG/L 47 11/83 - 05/96 <br />CARBONATE AS [03 2.067 7.4 24.000 -2.000 MG/L 15 02/91 - 05/96 <br />HYDRO%IDE AS OH -1.714 0.8 0.000 -2.000 MG/L 7 08/94 - 05/96 <br />CHLORIDE NOT APPLICABLE 17.800 8.6 27.000 10.000 MC/L 5 11/83 - 01/87 <br />SULFATE NOT APPLICABLE 1220.596 534.1 2220.000 150.000 MG/L 47 11/83 - 05/96 <br />Report Date: 11-MAR-97 Page: i of 3 <br />Report Name: WGA020R <br />