2014-07-22_PWETC_Minutes - Laserfiche WebLink

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Mr. Schwartz reported that the City Council, at that same meeting, had adopted a resolution supporting the City of Roseville's participation in the GreenStep Cities program, with the City's Environmental Specialist Ryan Johnson appointed as the City contact who would be communicating with the PCA to get the GreenStep website information up-to-date and additional data entry requirements met. Mr. Schwartz noted that the City of Roseville was now a GreenStep 1 City, and once that additional data input was completed, they should reach Step 2. Mr. Schwartz advised that staff would walk through the process and inventory with the PWETC as appropriate in the future. At the request of Chair Stenlund, Mr. Schwartz noted that the State PCA and Metro/CERTs ran the GreenStep program, with involvement by the League of Minnesota Cities in encouraging Minnesota cities to reduce their carbon foot print. At the request of Chair Stenlund, Mr. Schwartz advised that the bituminous delamination issue had not yet been resolved, with control section analysis currently underway and metro-wide conversations continuing. Mr. Schwartz advised that future consideration to upgrade the City's overlay program would be taken. 5. Raingardens and Other Stormwater BMP's Environmental Specialist Ryan Johnson provided a presentation at the request of the PWETC on the use and design of rain gardens and other storm water best management practices (BMP's) in Roseville. Mr. Johnson's presentation of"Rain Gardens 101," attached hereto and made a part hereof, reviewed the what's where, sand types of rain gardens, and what was or was not a rain garden, whose purpose was for infiltration of stormwater into amended soils and plantings. Mr. Johnson reviewed locations and their treatment values in capturing sediment, organics, and atmospheric-borne metals; and provided various examples and their levels of effectiveness. Mr. Johnson noted that problems continued with fertilizer runoff and grass clippings ending up in storm drains and eventually into water bodies unless some system of pipe drainage or infiltration system was put in place, allowing reduced pollutants keeping phosphorus out of those water bodies. Mr. Johnson went through the planning and installation process involved for a property owner to incorporate a rain garden or other BMP in Roseville, including preparation of the rain garden site and soils and provided various samples in the area of existing BMP's. Mr. Johnson reviewed sizes and depths for rain gardens, various infiltration systems based on soil types and water needed to be captured, and varieties of plantings and pricing. Mr. Johnson noted that this design process and information was all available for property owners through various resources available on line or by contacting him at City Hall, to get them directed toward design resources and recommended Page 6 of 15