2006-02-28_PWETC_AgendaPacket - Laserfiche WebLink

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Page 13 of 26 Pennit No: MN RlOOOOl IUnoff events sampled), identity lab used to analyze the samples and qnality assurance and quality control methods to be used. The plan must include a schedule for submitting the monitoring data annually. c. A mitigation plan that addresses how the water quality volume will be treated in the event that the monitoring data shows the proposed altemative treatment method does not function as designed. d. The altemative method must achieve approximately 80% removal of total suspended solids on an average annual basis for the conditions expected at the site. The design must also consider public safety, health and water quality concems. Proprietary infonnation on effectiveness will not be considered for alternative treatment method review and approval. No coustruction activity on the project is covered under this permit until the applicant receives an alternative treatment approval letter from the MPCA as described in PaIt II.B.3.c. D. RECORD RETENTION The SWPPP,all changes to it, and inspections and maintenance records must be kept at the site during construction by the Permittee who has operational control of that portion of the site. The SWPPP can be kept in either the field office or in an on site vehicle. All owner(s) must keep the SWPPP, along with the following additional records, on file for three years after submittal of the NOT as outlined in Part II.C. This does not include any records after submittal ofthe NOT. I. Any other permits required for the project; 2. Records of all inspection and maintenaI1Ce conducted during construction (see Part IV .E. Inspections and Maintenance); 3. All permanent operation and maintenance agreements that have been implemented, including all right of way, contracts, covenants and other binding requirements regarding perpetual maintenance; and 4. All required calculations for design ofthe temporary and pennanent storm water management systems. PART IV. CONSTRUCTION ACTIVITY REQUIREMENTS A. STORM WATER POLLUTION PREVENTION PLAN The Permittee(s) must implement the SWPPP and the requirements of this part. The Best Management Practices (BMPs) identified in the SWPPP and in this permit must be installed in an appropriate and functional manner. B. EROSION PREVENTION PRACTICES 1. The Permittee(s) must plan for and implement appropriate construction phasing, vegetative buffer strips, horizontal slope grading, and other construction practices that minimize erosion, so wq-strm2-51