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6. <br />(d) The proposed project must not adversely affect off-site water levels or resources supported <br />by local recharge, or increase the potential for off-site flooding, during or after construction. <br />(e) A landlocked basin may be provided an outlet only if it: <br />(1) Conforms with District Rule F, as applicable. <br />(2) Provides sufficient dead storage volume to retain the runoff resulting from back-to- <br />back 100 -year, 24-hour rainfall events. <br />(3) Does not create adverse downstream flooding or water quality conditions as a <br />result of the change in the rate, volume or timing of runoff or a change in drainage <br />patterns. <br />(f) A municipality or public road authority may prepare a comprehensive stormwater <br />management plan setting forth an alternative means of meeting the standards of sections 6 <br />and 7 within a defined subwatershed. Once approved by the District and subject to any <br />stated conditions, the plan will apply in place of those sections. <br />WATER QUALITY TREATMENT. <br />(a) Development creating or reconstructing impervious surface shall apply Better Site Design <br />(BSD) techniques as outlined in Chapter 4 of the MPCA Minnesota Stormwater Manual <br />as amended (www.stormwater.pca.mn.us). A BSD guidance document and checklist is <br />available on the District's website. <br />(b) Sediment shall be managed on-site to the maximum extent practicable before runoff <br />resulting from new or reconstructed impervious surface enters the off-site drainage <br />system. <br />(c) WATER QUALITY TREATMENT STANDARD. <br />(1) The required water quality treatment volume standard for all projects, except <br />Public Linear Projects, is determined as follows: <br />Required Area of New or TP Removal <br />Water Quality _ Reconstructed x 1.1 (in) - Factor from - 12 (in/ft) <br />Treatment Impervious Table C1 <br />Volume (ft) Surface (ft) <br />(2) The required water quality treatment volume standard for Public Linear Projects <br />is determined as follows: <br />Required Water Area of New Impervious <br />Quality Treatment = Surface (ft2) x 0.76 (in) - 12 (in/ft) <br />Volume (ft) <br />w <br />