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Table 1 -Whirlwind Mine, Water Treatment Monitoring Requirements <br />Parameter <br />Detection Permit Limits <br />Unit Limit 30-Day Ave. Daily Max. Frequency <br />Chemical Oxygen Demand mg/L 1 100 200 Weekly <br />Total Suspended Solids mg/L 10 20 30 Weekly <br />Oil and Grease (visual only) mg/L 1 NA 10 d/ If detected <br />pH (field measurement) s.u. NA NA 6.5 -9 d/ Weekly <br />Total Arsenic ug/L 1 100 Report Weekly <br />Total Recoverable Cadmium ug/L 1 10 Report Weekly <br />Total Recoverable Manganese ug/L 10 200 Report Weekly <br />Total Recoverable Selenium ug/L 1 20 Report Weekly <br />Total Recoverable Zinc ug/L 10 500 1,000 Weekly <br />Total Uranium ug/L 10 700 1,100 Weekly <br />Dissolved Radium 226 pCi/L 1 3 10 Weekly <br />Total Radium 226 pCi/L 1 10 5 Weekly <br />Total Dissolved Solids mg/L 10 Report Report Quarterly <br />Whole Effluent Toxicity (WET) Testing (a) NA NA (b) Quarterly <br />Boron mg/L 0.1 Report Report Monthly <br />Total Recoverable Beryllium ug/L 1 Report Report Monthly <br />Total Recoverable Trivalent Chromium ug/L 10 Report Report Monthly <br />Total Recoverable Lead ug/L 10 Report Report Monthly <br />Total Recoverable Nickel ug/L 10 Report Report Monthly <br />Total Recoverable Vanadium ug/L 10 Report Report Monthly <br />Weak Acid Dissociable Cyanide mg/L 0.005 Report Report Monthly <br />Note: <br />(a) Tests to be conducted using Ceriodaphnia dubia and fathead minnows. <br />(b) Statistical Difference & IC25 >_ IWC <br />8 <br />