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MINREC, INC., NORTH THOMPSON CREEK MINES <br />NORTH THOMPSON CREEK DOWSTREAM <br />Date <br />Parameter <br />Units <br />05/12/10 <br />5/19/2011 <br />9/29/2011 <br />5/31/2012 <br />9/21/2012 <br />MIN <br />MAX <br />AVG <br />pH <br />su <br />7.5 <br />7.5 <br />7.6 <br />7.3 <br />8.0 <br />7.3 <br />8.0 <br />7.6 <br />TSS <br />mg/1 <br />37 <br />69 <br />1 <br />10 <br />4 <br />1 <br />69 <br />24 <br />TDS <br />mg/1 <br />126 <br />92 <br />125 <br />480 <br />388 <br />92 <br />480 <br />242 <br />Oil & Grease <br />mg/1 <br />No Sheen <br />No Sheen <br />No Sheen <br />No Sheen <br />No Sheen <br />No Sheen <br />No Sheen <br />No Sheen <br />Arsenic Total <br />ug/1 <br />2.18 <br />3.79 <br /><0.2 <br />2.25 <br /><1.0 <br /><0.2 <br />3.79 <br />2.74 <br />Arsenic PD <br />ug/1 <br />1.47 <br />2.78 <br /><0.2 <br />2.00 <br /><1.0 <br /><0.2 <br />2.78 <br />2.08 <br />Chromium 3 TREC <br />ug/1 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />Copper, PD <br />ug/1 <br />9 <br />20.0 <br /><5.0 <br /><10.0 <br /><10.0 <br /><5.0 <br />20.0 <br />14.5 <br />Iron, Dissolved <br />ug/1 <br />200 <br />170.0 <br />90.0 <br />120.0 <br />370.0 <br />90.0 <br />370.0 <br />190.0 <br />Iron, trec <br />ug/1 <br />430 <br />600.0 <br />140.0 <br />140.0 <br />770.0 <br />140.0 <br />770.0 <br />416.0 <br />Manganese, PD <br />ug/1 <br />8.0 <br />50.0 <br />20.0 <br /><10 <br />20.0 <br />8.0 <br />50.0 <br />24.5 <br />Mercury, Tot <br />0.02 <br />0.02 <br />0.02 <br />0.03 <br />0.020 <br />0.030 <br />0.023 <br />Silver, PD <br />ug/1 <br />1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />1.0 <br />1.0 <br />Zinc, PD <br />ug/1 <br />13.0 <br />4.0 <br /><5.0 <br />40.0 <br />10.0 <br /><5.0 <br />40.0 <br />16.8 <br />Boron, Total <br />mg/1 <br />1.05 <br />0.81 <br />0.96 <br />0.76 <br />0.62 <br />0.62 <br />1.05 <br />0.84 <br />Sulfide <br />mg/1 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br />