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<br /> 178 E 9TH STREET | SUITE 200 | SAINT PAUL, MN | 55101 | 651.286.8450 | WSBENG.COM February 25, 2020 <br /> <br /> <br /> <br /> <br />Mr. Rick DeGardner <br />Public Services Director <br />City of Lino Lakes <br />600 Town Center Parkway <br />Lino Lakes, MN 55014 <br /> <br /> <br />Re: Proposal for Water Treatment Plant Feasibility Study <br /> City of Lino Lakes, MN <br /> <br /> <br />Dear Mr. DeGardner: <br /> <br />We appreciate the opportunity to submit this letter proposal to the City of Lino Lakes to complete <br />the Water Treatment Plant Feasibility Study. The Minnesota Department of Health recently <br />tested the City’s manganese levels in each of the City’s wells as part of the EPA Unregulated <br />Contaminant Monitoring Rule 4 (UCMR4). The water quality testing data from MDH indicates that <br />five of the City’s six wells exceed the maximum recommended manganese level for infants (100 <br />ppb), and three of the wells exceeds the maximum recommend manganese level for adults and <br />children (300 ppb). Therefore, the design and construction of a water treatment plant should be <br />studied to treat the high levels of manganese that exist in the City’s drinking water in addition to <br />treating other contaminants such as iron and ammonia. Alternative water supply options will also <br />be evaluated as part of this study. <br /> <br />I. SCOPE OF WORK <br /> <br />1. Alternative Water Supply Options <br /> <br />In lieu of constructing a water treatment plant(s) to treat the City’s existing wells, <br />alternative water supply options will also be evaluated. These options include: <br /> <br />A. Drilling new wells <br />B. Purchasing treated water from another community or water utility <br /> <br />2. Analyze Source Water <br /> <br />All existing water quality data for the City’s existing wells will be reviewed with respect to <br />primary and secondary drinking water standards as well as contaminants and emerging <br />contaminants. We recommend completing additional testing for any key water quality <br />parameters (ex. ammonia, total organic carbon, emerging contaminants, etc.) that <br />possibly have not been tested to date by the City. Our team will then develop a <br />comprehensive treatment plan that addresses all identified contaminants, ensures <br />regulatory compliance, and produces high quality water for the City’s customers. WSB <br />will also look ahead and evaluate the water quality parameters that will likely need to be <br />evaluated for both conventional and biological filtration for the water treatment pilot <br />testing to be completed in the next phase of the project. It is assumed for this study that <br />the City will pay for all water quality testing. <br />