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24 <br />(68) Source: Adapted from the "Design Infiltration Rates" table from the <br />Minnesota Stormwater Manual, MPCA (January 2014). <br />(69) * U.S. Department of Agriculture, Natural Resources Conservation <br />Service, 2005. National Soil Survey Handbook, title 430-VI. (Online) Available: <br />http://soils.usda.gov/technical/handbook/. <br />(70) ** ASTM standard D2487-00 <br />(71) <br />1. A minimum of three feet of separation from the seasonal high water table. <br />2. Design and placement in accordance with the 2007 Minnesota <br />Department of Health guidance Evaluating Proposed Stormwater Infiltration Projects in <br />Vulnerable Wellhead Protection Areas. <br />(b) Water reuse. The City adopts by reference RCWD Rules C.9.(b) as <br />amended.Water reuse BMPs must be designed to provide: <br />i design-An maximum irrigation rate of one-inch per week over the irrigated <br />lawn/turf grass area(s); <br />ii No greater than a 26 week (April 15 to October 15) growing season; and <br />2. No increase in stormwater runoff from the irrigated area or project site. <br />i The amount of water quality treatment volume credit given will be based upon <br />the three year average of the volume irrigated, determined by the average of three <br />years of monitoring records. <br />(c) Biofiltration and filtration BMPs. The City adopts by reference RCWD Rules <br />C.9.(c) as amended.Biofiltration and filtration BMPs must be designed to provide: <br />1. Adequate pretreatment measures to remove sediment before runoff enters <br />the primary biofiltration area; <br />2. Drawdown within 48-hours or 72-hours from the end of the storm event for <br />surface or sub-surface features, respectively; <br />3. A minimum of 12-inches of organic material or sand above the rock trench <br />or drain tile system; and <br />4. Drain tile system must be designed above the seasonal high water table. <br />(d) Stormwater ponds. The City adopts by reference RCWD Rules C.9.(d) as <br />amended. <br />(d)(e) Soil Borings. The City adopts by reference RCWD Rules C.9.(e) as <br />amended.Stormwater ponds must be designed to provide: <br />1. Water quality features consistent with NURP criteria and city standard <br />plate; <br />2. Permanent wet pool with dead storage at least equal to the runoff from a <br />two and one half inch rainfall over the area tributary to the pond