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PART Z Page 6 Permit No. COG-850000 • B. EFFLIIENT LIMZTATIONS AND lSONITORING REQDIREI~NTS 1. Effluent Limitations (continued) d) Burden o! Proof Requirement The permittee has the burden of proof when requesting relic! from total suepeaded solids (TSS), total iron and/or settleable solids limitations.-'Relief shall be granted only when necessary and shall not be granted whoa the parmittee has control over the discharge. The permittea should endeavor to meet the primary limitations whenever possible. 1) For rainfall, to waive TSS and total iron limitations, it is necessary to prove that discharge occurred within 48 hours after measurable precipitation hoe stopped. In addition, to waive settleable solids limitations, it is necessary to prove that discharge occurred within 48 hours after precipitation greater than the 10-year, 24-hour event has stopped. • 2) For enowmelt, to waive TSS and total iron limitations, it ie necessary to prove that discharge occurred within 48 hours after pond inflow hoe stopped. In addition, to waive settleable solids limitations, it is necessary to prove that discharge occurred within 48 hours after pond inflow volume greater than the 10-year, 24-hour event has stopped. The Division shall determine the adequacy of proof. Aa part.of this determination, the Division shall evaluate whether the permittae could have controlled the discharge in such a manner that primary limitations scold have been met. All manual dewaterinq must meet TSS and total iron limitations. 2. Stormwater Management Plan (SNMP1 A Stormwater Management Plan (SWlSP) shall be developed for the portion of each facility covered by this section of the permit. The SWliP shall be prepared in accordance with good engineering practices. (The plan need not be completed by a registered engineer.) The plan shall identify potential sources of pollution (including sediment) which may reasonably be expected to affect the quality of atormwater diachargea associated with the mining operation. In addition, the plan shall describe and ensure the implementation of beat management practices (Blips) which will be used to reduce the pollutants in etormwater diachargea associated with mining activity. Mining operations must implement the provicioas of the SwMP required under this part as a condition of this permit. The Division reserves • the right to request and review the plans, and to require additional measures to prevent and control pollution, as needed. Amended 10/13/94 Effective ii ~iv~,oi.