2015-12-22_PERMIT FILE - C1984065

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Appendix 4.7-8 PART I Page 8 of 31 Permit No.: CO0048972 Modification of any control measure as part of the corrective action required by the CORRECTIVE ACTIONS section must be performed consistent with the CONTROL MEASURES section of this permit. G. STORMWATER MANAGEMENT PLAN (SWMP) 1. General SWMP Requirements The following administrative requirements apply to the SWMP written to address all drainage areas contributing runoff to the outfalls referred to in this Part. The permittee shall develop a facility SWMP to comply with the requirements of this permit within 90 days of the permit effective date. a. SWMP requirement: The permittee must develop, implement, and maintain a SWMP. The SWMP shall be prepared in accordance with good engineering, hydrologic and pollution control practices (the SWMP need not be prepared by a registered engineer). The permittee must modify the SWMP to reflect current site conditions. b. Submission: The permittee must submit the SWMP to the Division if requested. c. Signatory Requirements: The permittee must sign the SWMP in accordance with the REPORTING AND RECORDKEEPING section; this requirement applies to the original SWMP prepared for the facility, and each time the permittee modifies a SWMP. d. Permit Retention: The permittee must maintain a copy of this permit with the SWMP. e. SWMP Retention: The permittee must retain a copy of the SWMP at the facility unless another location, specified by the permittee, is approved by the Division. f. Consistency with Other Plans: The permittee may incorporate, by reference, applicable portions of plans prepared for other purposes at their facility. Plans or portions of plans incorporated by reference into a SWMP become enforceable requirements of this permit and must be available along with the SWMP. g. Required SWMP Modifications: i. Division initiated: a) The permittee must modify the SWMP when notified by the Division that it does not meet one or more of the requirements of this permit. Unless otherwise provided by the Division, the permittee shall have 30 days after notification to make the necessary changes to the SWMP and implement them. b) The Division may require the permittee to submit the modified SWMP to the Division. c) If the Division determines that the permittee's stormwater discharges do not, or may not, achieve the effluent limits required by this permit, the Division may require the permittee, within a specified time period, to develop and implement a supplemental control measure action plan, which describes additional SWMP modifications to adequately address the identified water quality concerns. ii. Permittee initiated: a) The permittee must modify the SWMP whenever necessary to address any of the triggering conditions for corrective action in the CORRECTIVE ACTIONS section to ensure that they do not reoccur. b) The permittee must modify the SWMP whenever there is a change in design, construction, operation, or maintenance at the facility that significantly changes the nature of pollutants discharged in stormwater from the facility, significantly increases the quantity of pollutants discharged, or that requires the permittee to implement new or modified control measures. c) The SWMP modifications may include a schedule for control measure design and implementation, provided that interim control measures needed to comply with the permit are documented in the SWMP and implemented during the design period.