2009-02-23_PERMIT FILE - C1981038A (2)

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Permit Na. COG850000 Facility No. COG850043 Page Ib __-___________________________General Permit Requirements----------------_____________ ___~._____-__ Flow, MGD Report NA Report Discharge Evaluation Continuous / z Record2 r / Instantaneous In-situ pH, s.u. N/A NA 6.5-9.0 Water Quality Standards 2 days/month Grab Total Suspended Solids, mg/l _ 30 45 NA State Effluent Regulations 2 days/month Grab Oil and Grease, mg/1 N/A NA 10 State Effluent Regulations 2 days/month Visual s ---------------------------Federal Effluent Limitation Guidelines------------------- --------------- Settleable Solids, mUl * Report NA 0.5 .Federal ELG 2 days/month Grab i - Far a minor facility, as determined by the EPA NPAES Permit Rating Worksheet, all weekly monitoring requirements shall be changed to 2 days per month. 2 - LFpower is not available, flow maybe measured on an instantaneous basis. Major facilites shall monitor flow weekly, minor facilities 2 days /month 3 - If a visual sheen is noticed, a grab sample must be taken and analyzed for oil and grease 4 -Quarterly monitoring shall be prescribed if the limitation is based upon discharge to the Colorado River Basin. If the limitation is based upon agricultural protection, the monitoring frequency shall be weekly. * Alternate Limitations may also apply. See Below. ALTERNATE LIMITATIONS FOR POST-MINING RECLAMATION AREAS Any discharge or increase in the volume of a discharge from a reclamation area, caused by precipitation within any 24-hour period greaser than the 10-year, 24-hour precipitation event (or snowmelt of equivalent volume) ~ substitute the following limitations for these specific parameters only, subject to burden of proof requirements described in Part I.B.6 of the permit. Sediment Control Plan - Applicable to Reclamation Areas Served by Outfalls 001- 005. The Sediment Control Plan requirements in Part I.$.3.b. of the permit apply to the reclamation areas at this facility. The permittee shall prepare and subnut a Sediment Control plan by Julv 1, 2009. The Division will review the Sediment Control Plan and approve it. Once approved by the Division, the Sediment Control Plan will become a part of this permit certification by reference. Compliance Schedule for Sediment Control Plan for Reclamation Areas Code 12505 A Sediment Control Plan shall be prepared and submitted by July 1, 2009 for the Reclamation Areas as required under Part LB.3.b. of the: CDPS General Permit for Coal Mining Facilities and 40 CFR 434.82. The plan required by this compliance schedule shall be directed to the Industrial Unit of the Permits Section for final review. 12505 Submit Plan Submit Sediment Control Plan Part I.B.3.b. 07/01/09 Other Conditions Antide~radation Antidegradation review does not apply to this permit because limitations based on Water Quality Standards are not applied in this certification. Groundwater Contamination ]f groundwater contamination is encountered, then the permittee is to contact the Division, cease all discharges, and if appropriate, 't the owner of the collection system receiving the discharge. Since the discharge of contaminated groundwater is not '~ : ed under this permit, the permittee shall immediately apply for a grotndwater remediation certification, which will include appropriate requirements for additional discharge monitoring and on-site environmental response capabilities. • s S i t ,~~ a Permit Limitalians and Monitoring Requirements for Post Mining, Outfalls OOI, 002, 003, 004 and ODS -----r'ederal Effluent Limitation Guidelines---------------- ---- ..eable Solids, mUl Report NA Report Federal ELG ~ WeekIy Grab