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PART 11 <br />Page No. 9 <br />Permit No. COG -850000 <br />ALTERNATE LIMITATIONS FOR ACID OR FERRUGINOUS MINE DRAINAGE <br />(except as covered below under coal refuse piles or mountaintop removal) <br />Any discharge or increase in the volume of a discharge from an above ground mine (or underground mine where the <br />effluent is commingled with other categorical wastewater prior to discharge), caused by precipitation within any 24 <br />hour period less than or equal to the 2 -year, 24-hour precipitation event (or snowmelt of equivalent volume) may <br />substitute the following limitations for these specific parameters only, subject to burden of proof requirements <br />described in Part I.B.6. <br />Limitations <br />Parameter 30 -Day.- 7 -Day Daily Rationale Monitorings Sample <br />A-' A Iviax Frequency Type <br />Any discharge or increase in the volume of a discharge from an above ground mine (or underground mine where the <br />effluent is commingled with other categorical wastewater prior to discharge), caused by precipitation within any 24 <br />hour period greater than the 2 -year, 24-hour precipitation event, but less than or equal to the 10 -year, 24-hour <br />precipitation event (or snowmelt of equivalent volume) may substitute the following limitations for these specific <br />parameters only, subject to burden of proof requirements described in Part I.B.6. <br />vg. <br />vg. <br />Monitoring <br />Sample <br />---------------Federal Effluent Limitation <br />Guidelines -------------------- <br />7 -Day <br />Daily <br />Total Suspended Solids, mg/l <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />Total Manganese, mg/l <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />Total Iron, mg/l <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />Existing Sources (before 5/4/84) <br />Report <br />NA <br />7.0 <br />Federal ELG <br />Weekly <br />Grab <br />New Sources (after 5/4/84) <br />Report <br />NA <br />Report <br />Existing Sources (before 5/4/84) <br />Settleable Solids, ml/I <br />Report <br />NA <br />0.5 <br />Federal ELG <br />Weekly <br />Grab <br />New Sources (after 5/4/84) <br />Report <br />NA <br />Report <br />Settleable Solids, ml/I <br />Any discharge or increase in the volume of a discharge from an above ground mine (or underground mine where the <br />effluent is commingled with other categorical wastewater prior to discharge), caused by precipitation within any 24 <br />hour period greater than the 2 -year, 24-hour precipitation event, but less than or equal to the 10 -year, 24-hour <br />precipitation event (or snowmelt of equivalent volume) may substitute the following limitations for these specific <br />parameters only, subject to burden of proof requirements described in Part I.B.6. <br />Any discharge or increase in the volume of a discharge from an above ground mine (or underground mine where the <br />effluent is commingled with other categorical wastewater prior to discharge), caused by precipitation within any 24 <br />hour period greater than the 2 -year, 24-hour precipitation event, but greater than the 10 -year, 24-hour precipitation <br />event (or snowmelt of equivalent volume) may substitute the following limitations for these specific parameters only, <br />subject to burden of proof requirements described in Part I.B.6. <br />Limitations <br />Monitoring <br />Sample <br />Parameter' <br />30 -Day <br />7 -Day <br />Daily <br />Rationale <br />Frequency <br />Type <br />Avg. <br />Avg. <br />Max. <br />------------------------Federal Effluent <br />Limitation Guidelines ------------------------- <br />Total Suspended Solids, mg/l <br />Total Suspended Solids, mg/l <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />Total Manganese, mg/l <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />Total Iron, mg/l <br />Existing Sources (before 5/4/84) <br />Existing Sources (before 5/4/84) <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />New Sources (after 5/4/84) <br />Report <br />NA <br />Report <br />Settleable Solids, ml/I <br />Settleable Solids, mill <br />Report <br />NA <br />0.5 <br />Federal ELG <br />Weekly <br />Grab <br />Any discharge or increase in the volume of a discharge from an above ground mine (or underground mine where the <br />effluent is commingled with other categorical wastewater prior to discharge), caused by precipitation within any 24 <br />hour period greater than the 2 -year, 24-hour precipitation event, but greater than the 10 -year, 24-hour precipitation <br />event (or snowmelt of equivalent volume) may substitute the following limitations for these specific parameters only, <br />subject to burden of proof requirements described in Part I.B.6. <br />Limitations <br />Monitoring <br />Sample <br />Parameter <br />30 -Day <br />7 -Day <br />Daily <br />Rationale <br />Frequency <br />Type <br />Avg. <br />Avg. <br />Max. <br />_—__—-a-__-_—__Federal Effluent Limitation Guidelines --- ----------------__ <br />Total Suspended Solids, mg/l <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />Total Manganese, mg/l <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />Total Iron, mg/l <br />Existing Sources (before 5/4/84) <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />New Sources (after 5/4/84) <br />Report <br />NA <br />Report <br />Settleable Solids, ml/I <br />Report <br />NA <br />Report <br />Federal ELG <br />Weekly <br />Grab <br />