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BATTLE MOUNTAIN RESOURCES, INC -SAN LUIS <br />BI-WEEKLY WATER SAMPLING -OCTOBER 10, 23,1995 <br />CALCULATED CYANIDE VALUES <br /> ANALYTICAL METALS AND CYANIDE VALUES (mg/L) <br />SAMPLE SAMPLE CYANIDE <br />DATE LOCATION Cu Zn Mn Ni WAD TOTAL <br />10/10 COLLECTION POND/UNDERDRAIN 0.93 <0.01 NA NA 0.7 1 5 <br />10/10 TAILINGS POND 0.7 0.02 NA NA 0.09 0.12 <br />10/10 POST-DETOX 0.49 0.01 NA NA 0.08 0.18 <br />10/10 PRE-DETOX 18.2 0.19 NA NA 92 140 <br />10/23 COLLECTION POND/UNDERDRAIN 1.18 0.02 NA NA 0.78 1.32 <br />10/23 TAILINGS POND 0.79 0.06 NA NA 0.06 0.14 <br />10/23 POST-DETOX 0.1 0 04 NA NA 0.08 0.34 <br />10/23 PRE-DETOX 24.6 0.15 NA NA 50 92 <br />MPFCN=MAXIMUM POTENTIAL FREE CYANIDE <br />NA=NOT ANALYZED <br />CALCULATIONS BASED ON METHODS OUTLINED IN C YANIDE CH EMISTRY REPORT BY ASCI. MAY 1992 <br />CALCULATED CYANIDE VALUES (mg/L) <br />CN-WAD MPFCN <br />MIN MAX MIN MAX <br />0.77 1.16 0.00 0.00 <br />0.61 0.91 0.00 0.00 <br />O.a2 0.63 0.00 0.00 <br />15.32 23.05 68.95 76.68 <br />1.01 1.51 0.00 0.00 <br />0.75 1.08 0.00 0.00 <br />0.15 0.19 0.00 0.00 <br />20.54 30.99 19.01 29.47 <br />