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20 <br />Require <br />d Water Quality <br />Treatment <br />Volume [ft 3] <br />= Area of <br />New or <br />Reconstructe <br />d Impervious <br />Surface [ft2] <br />x 0.7 <br />5 [in] <br />÷ 1 <br />2 [in/ft] <br /> <br />(h) Public linear projects shall meet the requirements of the Rice Creek <br />Watershed District (RCWD) or Vadnais Lakes Area Water Management Organization <br />(VLAWMO) as applicable. <br />(i) Infiltration BMPs (see city BMP standard plates and design criteria) are to be <br />incorporated in areas with A and B hydrologic soil groups. Stormwater from impervious <br />surfaces other than rooftops must be pretreated before discharge to infiltration BMPs, to <br />remove sediment and floatables, or other materials that would restrict the BMP's <br />capacity or contaminate ground water. <br />(j) If the project meets any of the following conditions listed in Table 3, infiltration <br />is prohibited and the water quality volume requirements shall be provided the remaining <br />options in Table 2: <br /> <br />Table 3. Specific conditions that may restrict inflitration. <br />Type Specific Site Conditions <br />Potential Contamination <br /> <br />Potential stormwater hotspots <br />[PSH] <br />Contaminated soils <br />Vehicle fueling and maintenance <br />areas <br />Physical Limitations <br /> <br />Low permeability soils [HSG C and <br />D] <br />Bedrock within three vertical feet of <br />bottom of infiltration area <br />Seasonal high water table within <br />three vertical feet of bottom of infiltration <br />area <br />Where soil infiltration tests are <br />more than 8.3 inches per hour