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Bear Coal Company -Bear No. 3 Mine <br />• HYDROLOGY MONITORING DATA <br />STATION: Outflow 001 <br />Field Date -First Quarter <br />Parameters Min Max Ave <br />Flow m <br />ry units <br />Conductivity @ 2SC (umhos/cm) <br />Tem erature °C <br />Lab <br />Parameters <br />Wet Chemistry <br />Residue, Filterable TDS 180 C m /I <br />Residue, Non-Filterable TSS 103-5C m /I <br />Metal Analysis <br />Iron, total recoverable mgll <br /> Field Date -Second Quarter <br /> Parameters 06/16/06 06/30/06 Min Max Ave <br /> Flow m 9.1 9.1 9.1 9.1 9.1 <br /> Fi units <br /> Conductivity @ 2SC (umhoslcm) <br /> Tem erature °C <br /> Lab <br />Parameters <br /> Wet Chemistry <br />• Residue, Filterable TDS 180 C m /I <br />Residue, Non-Filterable TSS 103-5C m A <br /> Metal Analysis <br /> Iron, total recoverable m /I <br />Field Date -Third Quarter <br />Parameters 8122/2006 9/1212006 9/28/2006 Min Max Ave <br />Flow m 8.1 9.1 9.4 8.1 9.4 8.9 <br />Fi units 8.6 8.7 8.6 8.7 8.7 <br />Conductivity @ 23C (umhoslcm) 4500 4600 4500 4600 4550 <br />Tem erature °C 15.9 10.8 10.8 15.9 13.4 <br />Lab <br />Parameters <br />Wet Chemistry <br />Residue, Filterable TDS 180 C m /I 3497 3497 3497 3497 <br />Residue, Non-Filterable TSS 103-SC m /I ~ 3 3.0 3.0 3.0 <br />Metal Analysis <br />Iron, total recoverable m /I 1.18 1.18 1.18 1.18 <br /> Field Date -Fourth Quarter <br /> Parameters 10/16/2006 10/30/200 11/11/06 11/24/06 12/04/06 12121!06 Min Max Ave <br /> Flow g m 9.6 10.1 9.6 10.5 9.6 10.0 9.6 10.5 9.9 <br /> F1 units 8.7 8.7 8.7 8.6 8.6 8.7 8.6 8.7 8.7 <br /> Conductivity @ 23C (umhoslcm) 4200 4200 4200 4200 4100 4300 4100 4300 4200 <br /> Tem erature °C 6.8 7.0 6.4 4.2 1.7 4.0 1.7 8.8 5.4 <br /> Lab <br />Parameters <br /> Wet Chemistry <br /> Residue, Filterable (TDS 180 C m /I 3159 3099 3165 3099 3165 3141 <br /> Residue, Non-Filterable TSS 103-SC m /I 8 23 15 8.0 23.0 15.3 <br /> Metal Analysis <br />Iron, total recoverable m /I <br />0.84 1.22 1.65 0.84 1.65 1.24 <br />Page 6 <br />