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<br />AHR4 MINREC, INC., NORTH THOMPSON CREEK MINES <br /> REFUSE PILE PIEZOMETER <br />' D-lA <br /> <br />WATER . <br /> DATE LEVEL pH TEMP COND <br /> JUN 80 25.1 7.4 15 2910 <br /> SEP 80 28.8 7.4 13 2110 <br />' DEC 80 27.9 7.6 12 2515 <br /> MAR 81 22.0 7.6 11 3285 <br /> JUN 81 25.5 8.0 15 2865 <br /> SEP <br />DEC 81 <br />81 32.2 <br />31.9 7.7 <br />7.4 10 <br />10 3630 <br />2150 <br /> MAR 82 31.0 6.8 8 4000 <br /> JUN 82 30.9 6.9 14 3600 <br /> SEP 82 33.5 7.0 10 4000 <br />' DEC 82 31.9 6.9 8 3090 <br /> MAR 83 39.1 7.2 8 3500 <br /> JUN 83 30.9 6.B 10 3400 <br /> SEP 83 34.8 7.0 11 2550 <br /> DEC 83 32.3 7.2 12 4100 <br /> MAR 84 28.5 7.0 10 3900 <br /> JUN 84 30.9 7.0 14 3250 <br />' SEP 84 31.6 7.1 13 3200 <br /> DEC 84 31.9 7.1 5 4250 <br /> MAR 85 26.3 7.1 9 4105 <br /> JUN 85 25.1 6.5 10 2800 <br />' SEP 85 32.5 7.0 10 3750 <br /> DEC 85 31.0 7.0 4 3500 <br /> MAR 86 31.5 7.0 9 2800 <br /> JUN 86 31.5 7.0 10 3094 <br />' SEP 86 27.0 7.0 4260 <br /> DEC 86 30.7 7.1 9 2482 <br /> MAR 87 30.8 7.7 6 3602 <br />' JUN 87 32.2 7.1 10 3588 <br /> SEP 87 32.2 7.0 11 3571 <br /> DEC 87 31.8 6.8 8 3618 <br /> MAR 88 32.0 6.9 10 3737 <br />' JUN 88 34.2 6.8 12 3400 <br /> SEP 88 34.4 7.0 10 4300 <br /> DEC 88 34.6 7.2 9 4400 <br /> MAR 89 32.5 7.0 8 3700 <br />t JUN 89 <br /> SEP 89 34.8 7.0 10 4200 <br /> DEC 89 33.7 6.8 8 4300 <br />' MAR 90 34.4 7.0 10 4300 <br /> JUN 90 32.9 7.2 11 4300 <br /> SEP 90 34.5 6.9 14 4100 <br />' DEC <br />MAR 90 <br />91 35.0 <br />32.1 7.3 <br />7.1 7 <br />9 4400 <br />3500 <br /> JUN 91 34.4 7.0 12 3900 <br /> SEP 91 34.9 6.9 11 4400 <br /> DEC 91 34.9 7.0 9 4400 <br />' MAR 92 35.0 6.9 11 4300 <br /> JUN 92 34.9 7.1 10 4200 <br /> SEP 92 34.8 7.0 11 3600 <br /> <br />~' <br />