2012-03-07_PERMIT FILE - C2010088 (21)

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COLORADO DEPARTMENT OF PUBLIC HEALTHAND ENVIRONMENT, Water Quality Control Division Rationale - Page 2. Permit No. COR- 010000 L INTRODUCTION (cons) d) Deadlines for SWMP Changes: The section on permittee- initiated review and changes to the SWMP has been amended to clearly indicate the deadline by which SWMP changes and implementation are required. Note that this time frame is not a grace period from permit violations. If the original inadequacy constitutes a permit violation, then that violation is not deferred by the timeframe allotted for corrective action. The time limits are those that the Division considers reasonable for making the necessary repairs or modifications, and are included specifically so that inadequacies are not allowed to persist indefinitely. Failure to take the necessary corrective action within the stipulated time limit constitutes an additional and independent permit violation. See Part LC.2.c.2). 6. Non - stormwater Discharges The section on allowable non- stormwater discharges has been expanded to include several new sources, in accordance with the sources that are allowed under EPA's stormwater multi- sector general permit. In general, these sources are considered to have a low environmental risk. However, appropriate control measures to minimize the impacts of such sources must be implemented if needed, and the sources and controls must be identified in the SWMP. As an example, discharges of potable water must be handled in such a way that any chlorine present in the discharge is allowed to dissipate before the discharge reaches state waters. See Part LC.3. 7. Inspections a) Preventive Maintenance vs. Comprehensive Inspections: The sections on preventive maintenance (Part I.B.3.f and comprehensive inspections (Part L C.5) have been changed to emphasize that regular preventive maintenance measures are distinct from specific comprehensive site evaluation, although the former may be incorporated into the latter. b) The term "qualified personnel, " as used in the section on comprehensive inspections, has been defined. See Part c) Inspection Findings: The section on inspection findings has been changed to emphasize that any repairs or maintenance needs identified by the inspection must be completed immediately. Also, any SWMP changes needed as a result of an inspection must be completed and implemented within 60 days of discovery, as per the section on permittee- initiated SWMP changes. See Part LC.5.b. d) The term "signifurant observations, " as used in the section on comprehensive inspections, has been defined. See Part I.C5.c. 8. Total Maximum Daily Load fTMDU: A section on TMDLs has been added. This section gives a general outline of the additional requirements that may be imposed if the, facility discharges to a waterbody for which a stormwater - relaxed TAML is in place. See Part I.C.7. 9. Signatory Requirements: For public entities, the term "duly authorized employee, " as used in the section detailing who may sign reports to be submitted to the Division, has been clarified. See Part LDJ.a.4). 10. Record- Keepimt: The section describing which records must be maintained and for how long has been clarified. See Part LE.2. 11. Changes in Discharee: The section on the types of discharge or facility changes that necessitate Division notification has been clarified. See Part ILA.1 12. Non - Compliance Notification: The section on notification to the Division regarding instances of non- compliance has been amended to clarify which types of discharges require notification. See Part II.A.3. Numerous other minor changes were made for clarification purposes only.