2016.08.15 CC Packet - Laserfiche WebLink

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PARAMETER CONCERN RESULT (Average between two samples) Total suspended solids System function <5 mg/L Turbidity System function 3.7 NTU pH Plant health 8.56 Chloride Plant health, metal corrosion 36.5 mg/L Zinc Plant health <5 µg/L Copper Plant health <1 µg/L E. coli Public health 5 MPN/100mL Abbreviations: mg = milligrams L = Liter NTU = Nephelometric Turbidity Units µg = Micrograms MPN = Most Probable Number A copy of the analytical results can be made available upon request. Task 2: Conduct Neighborhood Meeting Prior to advertising for bids, City staff, RCWD, and WSB will hold a neighborhood meeting at Water's Edge. At the meeting, residents will be provided with an overview of the project and will be allowed to ask questions or express concerns. WSB will provide the residents with educational materials including a schematic of the system, examples of similar systems, and a representation of the expected pond drawdown. As an additional public education effort, a permanent information sign will be posted in the area to promote awareness of the project and stormwater management generally. Task 3: Development of Plans and Specifications Plans and specifications will be developed for the project during the fall of 2016. The plans will delineate the order of construction, the materials to be used, and the expected function of the system. The specifications will detail the manner in which the contractor shall connect the irrigation system to stormwater and will mandate a backflow preventer to ensure there is no contamination between stormwater and drinking water. The plans and specifications will ensure the project is built as intended and is well-functioning. Task 4: Permitting The City will obtain a Minnesota Department of Natural Resources Water Appropriation Permit for the project. A permit is required for water withdrawal of more than 10,000 gallons per day or 1 million gallons annually. It is estimated that the system will use 113,000 gallons per irrigation cycle. While the project will not require a permit from the Rice Creek Watershed District (RCWD), the City, WSB, and RCWD have collaborated on water reuse systems in the past and will do so for this project. Because RCWD is the grantee for the funding provided by the Metropolitan Council, collaboration will be essential to the success of the project. RCWD allows stormwater reuse systems to provide stormwater volume reduction credits for development or public linear projects. The reuse system at Water's Edge will be used to meet watershed permit requirements for a future project. EXHIBIT B