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PAGE 1 <br />TABLE 17 <br />SUMMARY OF WATER QUALITY DATA <br />MIDDLE CREEK ABOVE MINE 3. USGS SITE 09243700 <br />PARAMETER MEAN STD. DEV. MAX. MIN. UNITS. N0. PERIOD <br />PHYSICAL PROPERTIES <br />TEMPERATURE FIELD 11. 211 7.597 29.000 0. 000 DEGREES C 99 10/83- 8/91 <br />CONDUCTIVITY FIELD 686. 993 171.253 1370.000 310. 000 UMHOS/CM 159 9/75- 8/91 <br />CONDUC7IVITV LAB 736. 764 138.252 956.000 455. 000 UMHOS/CM 17 10/66- 6/91 <br />PH FIELD 6. 279 0.378 8.800 7. 000 PH 155 9175- 8191 <br />PH LAB 8. 353 0.139 8.500 6. 100 PH 6 10/66- 2/66 <br />ALKALINITY TOTAL 216. 000 49.261 301.000 110. 000 MG/L 62 10/75- 8/91 <br />HARDNESS TOTAL 306. 562 64.313 450.000 146. 000 MG/L 96 10/75- 6/91 <br />SOLIDS DISSOLVED 497. 368 92.557 632.000 318. 000 MG/L 19 10/86- B/91 <br />SOLIDS SUSPENDED <320. 225 675.955 3390.000 <1. 000 MG/L 40 11/83- 6/91 <br />OILBGREASE VISI 2. 000 0.000 2.000 2. 000 16 7/67- 7/69 <br />SAR 0. 679 0.227 1.046 0. 079 45 7/60- 6/91 <br />CATIONS <br />CALCIUM DISSOLVED 71. 531 14.026 103.000 36. 000 MG/L 96 10/75- 8/91 <br />MAGNESIUM DISSOLVED 31. 104 7.386 46.000 14. 000 MG/L 96 10/75- 6/91 <br />SODIUM DISSOLVED 29. 577 10.998 50.000 11. 000 MG/L 45 7/80- 6/91 <br />POTASSIUM DISSOLVED 3. 464 1.970 19.000 1. 500 MG/L 79 10/75- 2/86 <br />ANIONS <br />BICARBONATE AS HC03 267. 054 60.953 370.000 140. 000 MG/L 48 10/75- 6/91 <br />CARBONATE AS C03 4. 272 3.408 10.000 1. 000 MG/L 11 12/75- 8/91 <br />CHLORIDE 4. 624 1.400 6.100 1, 100 MG/L 75 10/75- 2/86 <br />SULFATE 141. 566 51.689 274,000 41. 000 MGlL 90 10175- BJ91 <br />U = MICRO <br />START <br />