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Pcrmit.No. COG-8500Q7 <br />Facility No. COG-850019 <br />Page la <br />~• Ourfall 001 shall be the discharge ojfinal treated water prior to entering the Harvry Gap Drainage. Egluent limitations <br />arc specified below and in Pan 1. B. I.bJ and cJ. <br />' Parameter :: .. Limltalion Rationale.:. .. <br />Flow, MGD Report Design Capacity <br />Settleable Solids, mP/P 0.5" c! Federal BAT <br />pH, s. u. 6.5-9.0 a/ Water Quality Standards <br />Oil and Grease, mg/P 10 c/ State EjJluent Regulations <br />Total Dissolved Solids, mg/P Report CO River Salinity Regulations <br />a/ Minimum-Maximum <br />b/ 30-Day Average/Daily Maxinwm <br />c/ Daily Maximum <br />" The discharge may be eligible for an exemption from this limitation if it is demonstrated thtu the discharge occurred <br />as a result of precipitation greater than the associated 10 year, 24 hour event. See permit, Part I.B.I.dJ. <br />7)re permittee is encouraged to read the general rationale for an understanding of how this permit was developed and to <br />read the permit m see w~5at requirements exist. Within the body of the permit itself, monitoring requirements are specified <br />in Parr LB.3.bJ, the Stormwnter Management Plan requirements are specified in Part I.B.2. and notification requirements <br />far effluent violations are addressed in Part II.A. <br />,~ Salinity (TDS) monitoring of the discharge wiU be required, as shown in the table above. Phosphorus monitoring of <br />the discharge wiU trot be required. <br />Certification: Based on the above information, Eastside Coal Company, Inc. rs certified to discharge from the Eastside <br />Mine under the general permit for coal mining, identfied as permit number COG-850000. All correspondence relative <br />to this facility should reference the specific facility number, COG850019. <br />!on C. Kubic <br />May 6, 1997 <br />