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m m m m m m r m m ! m m m <br /> PAGE 1 <br /> TABLE 21 <br /> SUMMARY OF WATER QUALITY DATA <br /> STATION 24, MIDDLE CREEK MINE DISCHARGE <br /> PARAMETER MEAN STD. DEV. MAX. MIN. UNITS. NO. PERIOD <br /> PHYSICAL PROPERTIES <br /> TEMPERATURE FIELD 12.040 5.313 24.000 0.000 DEGREES C 126 3/79- 4/89 <br /> CONDUCTIVITY FIELD 1039.723 386.521 278D.000 450.000 UMHOS/CM 123 5/79- 4/89 <br /> PH FIELD 7.259 0.503 8.900 6. 100 PH 127 3/79- 4/89 <br /> PH LAB 7.400 0.000 7.400 7.400 PH 1 4/87 <br /> HARDNESS TOTAL 597.000 0.000 597.000 597.000 MG/L 1 8/81 <br /> SOLIDS DISSOLVED 1139.601 461 .506 2660.000 144.000 MG/L 116 3/79- 4/89 <br /> SOLIDS SUSPENDED c469.678 3793.066 40360.000 2.000 MG/L 115 3/79- 7/87 <br /> SOLIDS SETTLEABLE <0.212 0. 184 0.900 <0. 100 ML/L 40 7/83- 4/89 <br /> OILBGREASE VISI 2.000 0.000 2.000 2.000 26 7/84- 4189 <br /> SAR 0.641 0.000 0.641 0.641 1 8/61 <br /> CATIONS <br /> CALCIUM DISSOLVED 132.000 0.000 132.000 132.000 MG/L 1 8/8) <br /> MAGNESIUM DISSOLVED 65.000 0.000 65.000 65.000 MG/L 1 B/B1 <br /> SODIUM DISSOLVED 36.000 0.000 36.000 36.000 MG/L 1 8/81 <br /> POTASSIUM DISSOLVED 4.200 0.000 4.200 4.200 MG/L 1 8/81 <br /> ANIONS <br /> BICARBONATE AS HCO3 417.240 0.000 417.240 417.240 MG/L 1 8/81 <br /> CARBONATE AS CO3 <4.800 0.000 <4.800 <4.800 MG/L 1 8/81 <br /> CHLORIDE 9.000 0.000 9.000 9.000 MG/L 1 8/81 <br /> SULFATE 350.000 0.000 350.000 350.000 MG/L 1 8/81 <br /> U = MICRO <br />