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<br />. <br /> <br />. <br /> <br />. <br /> <br />17. WATER QUALITY - SURFACE WATER RUNOFF <br /> <br />EAW: <br /> <br />A. COMPARE THE QUANTITY AND QUALITY OF SITE RUNOFF BEFORE AND <br />AFTER THE PROJECT. DESCRIBE METHODS TO BE USED TO MANAGE <br />AND/OR TREAT RUNOFF. <br /> <br />B. IDENTIFY THE ROUTE(S) AND RECENING WATER BODIES FOR RUNOFF <br />FROM THE SITE. ESTIMATE THE IMPACT OF THE RUNOFF ON THE QUALITY <br />OF THE RECEIVING WATERS. <br /> <br />AUAR: <br />For an AUAR, the following additional guidance should befollowed in addition to that in <br />the "EA W Guidelines. " <br /> <br />. <br /> <br />It is expected that an A UAR will have a detailed analysis of storm water issues. <br /> <br />. <br /> <br />A map of the proposed storm water management system and of the water bodies that <br />will receive storm water should be provided. <br /> <br />The description of the storm water management should identify on-site and "regional" <br />detention ponding and also indicate whether the various ponds will be new water <br />bodies or converted existing ponds or wetlands. Where on-site ponds will be used but <br />have not yet been designed, the discussion should indicate the design standards that will <br />be followed. <br /> <br />. <br /> <br />. <br /> <br />Ifpresent in or adjoining the AUAR area, the following types of water bodies must be <br />given special analyses: <br /> <br />Lakes: Within the Twin Cities metro area a nutrient budget analysis must be <br />prepared for any "priority lake" identified by the Metropolitan Council (see <br />Appendix E of "EA W Guidelines" (1990) or contact the Council stafJ). Outside of <br />the metro area, lakes needing a nutrient budget analysis must be determined by <br />consultation with MPCA and DNR stoffi;; <br /> <br />Traut streams: If storm water discharges will enter or affect a trout stream, an <br />evaluation of the impacts an the chemical composition and temperature regime of <br />the stream and the consequent impacts on the trout population (and other species <br />of concern) must be included. <br /> <br />According to the February 2002 Local Storm Water Management Plan (LSMP) for the City <br />of Arden Hills, the AUAR study area is located within the Valentine Lake district in the <br />Rice Creek Watershed District (RCWD). There are 13 wetlands in or near the study area. <br />Seven of the wetlands are affected by the existing and future drainage from the proposed <br />project. These seven wetlands include Wetlands A, C, D, E, F, G and L and are shown in <br />Figurc 12. <br /> <br />Guidant Campus Master PIau <br />Draft AUAR <br /> <br />.20. <br /> <br />September 2002 <br />