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Table 1: Required Amount of Bromide Tracer
<br /> Elevation Mine Volume Mine Volume ine Volume
<br /> Range in Within Elevation Range (1)Total Cumulative Total NaBr (2) NaBr
<br /> fee_t_m_sl 4 Cubic Feet _ Cubic Feet Gallons Lbs Cumulative
<br /> 10600-10700 1,431,680 1,431,680 10,710,462 255.6 256
<br /> 10700-10800 2,803,560 _ 4,235,240 20,969,133 500.4 756
<br /> 10800-10900 3,060,480 7,295,720 22,862,311 546.3 1302
<br /> 10900-11000 2,073,568 9,369,288 15,510,368 370.2 1673
<br /> 11000-1 1 100 _ _ 1,464,920 _ 10,834,208 10,957,602 261.5 1934
<br /> 11100-11200 1,115,795 11,950,003 8,346,184 199.2 2133
<br /> 11200-11300 2,428,849 14,378,852 18,167,753 433.6 2567
<br /> 11300-11400 3,910,376 18,289,228 29,249,612 698.1 3265
<br /> 11400—11500 _ 7,831,061 26,120,289 58,576,337 1398.0 4663
<br /> 11560-11600 8,164,582 34,284,871 61,071,073 1457.5 6120
<br /> 11600-11700 _ _ 11,088,606 45,373,477 82,942,773 1979.5 8100
<br /> 11700-11800 __ 8,060,117 53,433,594 60,289,675 1438.9 9539
<br /> 11800-11900 6,551,766 59,985,360 49,007,210 1169.6 10708
<br /> 11900-12000 4,400,208 64,385,568 32,913,556 785.5 11494
<br /> 12000-12100 __ 3,503,472 67,889,040 26,205,970 625.4 12119
<br /> 12100-12200 2,469,312 70,358,352. 18,470,454, 440.8 12560
<br /> (1) From Simon Hydro—Search, Inc., 1993, "Table 4" and Appendix B.
<br /> (2) Formula = [(gallons mine water/1,000,000)*8.34]/0.77657)/0.45. This weight of tracer will result in an approximate
<br /> average concentration of one part per million of bromide in the impounded waters.
<br /> (3) Quoted$0.96/lb of 45% NaBr Solution (Great Lakes Chemical)
<br /> Conversion
<br /> 1 ppm = 8.34 Ibs/million gallons
<br /> Atomic Weight
<br /> K = 39.0983
<br /> Br = 79.904
<br /> Na = 22.98977 thus, Br— is 77.657% by weight of NaBr molecule
<br /> G:\sunny\wp\trxVZ-S I\Natrwer.WU
<br /> HMI simon HYDRO-SERRCH
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