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2016-04-26_PWETC_AgendaPacket
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2016-04-26_PWETC_AgendaPacket
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Public Works Commission
Commission/Committee - Document Type
Agenda/Packet
Commission/Committee - Meeting Date
4/26/2016
Commission/Committee - Meeting Type
Regular
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Page 15 of 38 <br /> Permit No: MNR040000 <br /> 5. Post-Construction Stormwater Management <br /> New permittees shall develop, implement, and enforce, and existing permittees shall revise <br /> their current program, as necessary, and continue to implement and enforce, a Post- <br /> Construction Stormwater Management program that prevents or reduces water pollution <br /> after construction activity is completed, related to new development and redevelopment <br /> projects with land disturbance of greater than or equal to one acre, including projects less <br /> than one acre that are part of a larger common plan of development or sale,within the <br /> permittee's jurisdiction and that discharge to the permittee's small MS4.The program shall <br /> consist, at a minimum, of the following: <br /> a. A Regulatory Mechanism(s)that incorporates: <br /> (1) A requirement that owners and/or operators of construction activity submit site <br /> plans with post-construction stormwater management BMPs to the permittee for <br /> review and approval, prior to start of construction activity <br /> (2) Conditions for Post-Construction Stormwater Management: <br /> The permittee shall develop and implement a Post-Construction Stormwater <br /> Management program that requires the use of any combination of BMPs,with <br /> highest preference given to Green Infrastructure techniques and practices (e.g., <br /> infiltration, evapotranspiration, reuse/harvesting, conservation design, urban <br /> forestry, green roofs, etc.), necessary to meet the following conditions on the site of <br /> a construction activity to the MEP: <br /> (a) For new development projects—no net increase from pre-project conditions <br /> (on an annual average basis) of: <br /> 1) Stormwater discharge Volume, unless precluded by the stormwater <br /> management limitations in Part III.D.5.a(3)(a) <br /> 2) Stormwater discharges of Total Suspended Solids (TSS) <br /> 3) Stormwater discharges of Total Phosphorus (TP) <br /> (b) For redevelopment projects—a net reduction from pre-project conditions (on <br /> an annual average basis)of: <br /> 1) Stormwater discharge Volume, unless precluded by the stormwater <br /> management limitations in Part III.D.5.a(3)(a) <br /> 2) Stormwater discharges of TSS <br /> 3) Stormwater discharges of TP <br /> (3) Stormwater management limitations and exceptions <br /> (a) Limitations <br /> 1) The permittee's Regulatory Mechanism(s) shall prohibit the use of <br /> infiltration techniques to achieve the conditions for post-construction <br /> stormwater management in Part III.D.5.a(2)when the infiltration structural <br /> stormwater BMP will receive discharges from, or be constructed in areas: <br />
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