Laserfiche WebLink
PARTI <br />Page No. 5 <br />Permit No. COG-850000 <br />annual precipitation of 26.0 inches or less. <br />The above categories are subject to 40 CFR Part 434 Subparts B (Coal Preparation Plant and Associated Areas), D <br />(Alkaline Mine Drainage) and F (Miscellaneous Provisions). These limitations also apply to Western Coal Mining <br />Operations. The following limitations apply as outlined in these subparts. <br /> _ <br />Limitations ___._.. .. . ..... <br />Monitnrin; <br />Sample <br />Parameter 30-Day 7-Day Daily Rationale Frequency Type <br /> <br /> General Permit Requiremen <br />Flow, MGD <br />Report <br />NA <br />Report <br />Discharge Evaluation Continuous / <br />Instantaneous2 Recorder / <br />In-situ 2 <br />pH <br />s.u. N/A NA 6.5-9.0 Water Quality Standards Weekly Grab <br />a <br />, <br />Oil and. Grease, mg/1 N/A NA 10 State Effluent Regulations Weekly Visual <br /> Federal Effluent Limitation Guidelines <br />Total SusPended Solids mg/1 35 NA 70 Federal ELG Weekly Grab <br />Total Iron, mg/1 <br />Existing Sources (before 3.5 NA 7.0 Federal ELG <br />5/4/84) 3.0 NA 6.0 <br />New Sources (after 5/4/84) <br />Weekly Grab <br />Settleable Solids, m111 Report NA 0.5 Federal ELG Weekly <br /> <br />Total Dissolved Solids, mg/i • Site Specific Limitation <br />Report NA Report <br />Salinity Regulations <br />Quarterly ° <br />Total Phosphorus (as P), mg/1 •• Report NA Various Control Regulations Monthly <br />Total Recoverable Iron, ug/1 1000 NA NA Water Quality Standards Weekly <br />Other Pollutants of Concern Various NA Various Water Quality Standards Weekly <br />Whole Effluent Toxicity (WET) <br />Chronic Stat Diff and IC25 > IWC State Permit Limitations Quarterly <br />Acute LC50 > 100% State Permit Limitations - <br />Grab <br />Grab <br />Grab <br />Grab <br />Grab <br />3 Grab/Test <br />Grab <br />Footnotes 1-4, • and •• can be found under Part I.B.I. <br />•sr This limitation will apply and will substitute for the 30-day average total iron limit based upon the ELG, when a total recoverable iron standard is applicable to <br />the stream segment. <br />ALTERNATE LIMITATIONS FOR ALKALINE MINE DRAINAGE AND <br />COAL PREPARATION AND ASSOCIATED AREAS <br />Any discharge or increase in the volume of a discharge from an above rg ound alkaline mine (or an underground <br />alkaline mine where the effluent is commingled with other categorical wastewater prior to discharge), caused by <br />precipitation within any 24-hour period less than or egual to the 10-year, 24-hour precipitation event (or snowmelt of <br />equivalent volume) My substitute the following limitations for these specific parameters only, subject to burden of <br />proof requirements described in Part I.B.6. <br /> Linutatsons Monitoring_ Sample <br />Parameter 30-Day 7-nay Daily' Rationale Fregiency' Type <br /> Avg. ??ug . Max. <br /> Federal Effluent Limitation Guidelines <br />Total Suspended Solids, mg/1 Report ' NA Report Federal ELG Weekly Grab <br />Total Iron, mg/1 <br />Existing Sources (before Report NA Report Federal ELG Weekly Grab <br />5/4/84) Report NA Report <br />New Sources (after 5/4/84) <br />Any discharge or increase in the volume of a discharge from an above around alkaline mine (or an underground <br />alkaline mine where the effluent is commingled with other categorical wastewater prior to discharge), caused by <br />precipitation within any 24-hour, period greater than the 10-year 24-hour precipitation event (or snowmelt of <br />equivalent volume) My substitute the following limitations for these specific parameters only, subject to burden of <br />proof requirements described in Part I.B.6.