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TWENTYMILE COMPANY . <br />PERMIT REVISION 6 <br />PERIOD OF RECORD WATER QUALITY DATA <br />CATEGORY PARAMETER ANALYS/S TYPE AVERAGE STD. DEV. MAXIMUM MINIMUM UNITS COUNT BEGIN END <br />PHYSICAL PROPERTIES TEMPERATURE FIELD 8.79 3.27 18.00 1.80 DEGREES C 183 01/87 12/02 <br /> CONDUCTNITY FIELD 1,397.99 322.15 3,490.00 438.20 UMHOS/CM 183 01/87 12/02 <br /> LAB 1,362.25 229.80 1,904.00 878.00 UMHOS/CM 61 01/87 11/02 <br /> PH FIELD 7.66 0.33 8.50 6.86 PH 182 01/87 12/02 <br /> LAB 7.46 0.25 8.10 7.06 PH 22 01/87 11/02 <br /> ALKALINITY TOTAL 321.67 37.60 375.00 138.00 MG/L 51 01/87 08/99 <br /> HARDNESS AS CACO3 464.56 98.54 717.00 308.00 MG/L 50 01/87 08/99 <br /> SOLIDS SUSPENDED 1,704.00 0.00 1,704.00 1,704.00 MG/L 1 06/91 06/91 <br /> TOTAL-DISS 989.79 228.07 1,500.00 596.00 MG/L 6l 01/87 11/02 <br />CATIONS CALCIUM DISSOLVED 119.39 31.48 188.00 19.00 MG/L 61 01/87 11/02 <br /> MAGNESIUM DISSOLVED 51.67 14.42 83.40 6.20 MG/L 61 01/87 11/02 <br /> SODIUM DISSOLVED 134.72 19.95 173.00 13.00 MG/L 61 01/87 Il/02 <br /> SAR NOT APPLICABLE 2.70 0.26 3.58 1.97 UNDEFINED 53 01/87 08/99 <br />ANIONS BICARBONATE AS HCO3 398.64 59.63 640.00 !68.00 MG/L 64 01/87 11/02 <br /> CARBONATE AS CO3 0.68 3.26 19.00 0.00 MG/L 38 02/91 11/02 <br /> HYDROXIDE AS OH 0.00 0.00 0.00 0.00 MG/L 20 12/94 08/99 <br /> SULFATE NOT APPLICABLE 487.11 224.58 1,870.00 263.00 MG/L 65 01/87 11/02 <br />PRIMARY ARSENIC DISSOLVED 0.00 0.00 0.00 0.00 UG/L 1 04/89 04/89 <br /> CADMIUM DISSOLVED 0.04 0.15 1.00 0.00 UG/L 60 01/87 11/02 <br /> TOTAL RECOV 0.30 0.00 0.30 0.30 UG/L 1 06/91 06/91 <br /> LEAD DISSOLVED 2.00 7.98 40.00 0.00 UG/L 60 01/87 11/02 <br /> MERCURY DISSOLVED 0.00 0.01 0.10 0.00 UG/L 60 01/87 11/02 <br /> TOTAL RECOV 0.00 0.00 0.00 0.00 UG/L 1 06/91 06/91 <br /> SELENIUM DISSOLVED 0.25 0.93 6.00 0.00 UG/L 60 01/87 11/02 <br /> TOTAL RECOV 0.00 0.00 0.00 0.00 UG/L 1 06/91 06/91 <br />SECONDARY SILVER TOTAL RECOV 0.00 0.00 0.00 0.00 UG/L 1 06/91 06/91 <br /> ZMC DISSOLVED 5.00 7.07 10.00 0.00 UG/L 2 01/87 04/89 <br /> TOTAL RECOV 30.00 0.00 30.00 30.00 UG/L 1 06/91 06/91 <br /> IRON DISSOLVED 532.46 1,688.45 13,000.00 0.00 UG/L 61 01/87 11/02 <br /> TOTAL RECOV 10,100.00 0.00 10,100.00 10,100.00 UG/L 1 06/91 06/91 <br /> MANGANESE DISSOLVED 114.02 46.91 270.00 0.00 UG/L 60 01/87 11/02 <br /> TOTAL RECOV 140.00 0.00 140.00 140.00 UG/L 1 06/91 06/91 <br />TRACE METALS MOLYBDENUM DISSOLVED 0.17 L29 10.00 0.00 UG/L 60 01/87 11/02 <br /> TOTAL RECOV 0.00 0.00 0.00 0.00 UG/L 1 06/91 06/91 <br />NUTRIENTS NITROGEN AMMIUM-TOTAL 1.51 2.15 12.00 0.00 MG/L 58 01/87 11/01 <br /> AMMIA-FREE 0.22 0.68 4.11 0.00 MG/L 52 01/87 11/02 <br /> NITRATE 0.28 0.35 1.95 0.00 MG/L 60 01/87 11/02 <br /> NITRITE 0.04 0.04 0.15 0.00 MG/L 29 04/95 11/02 <br />TABLE 8n SITE: 006-AZ-3 (FISH CREEK ALLUVIUM) <br />