Agenda Packets - 1983/03/14 - Laserfiche WebLink

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' EXHIBIT A WATER, SYSTEM INVESTIGATION FOR THE CITY OF MOUNDS VIEW, MINNESOTA To assist the City of Mounds View to solve its high iron and manganese concentration problems, we propose to conduct an engineering investigation which will include the following tasks; 1. Arrange for the determination of the iron and manganese levels at the treatment plant locations, before and after treatment, and at various locations in the distribution system (as reflected by customer complaints) over a period of 30-45 days. Water quality sampling and analysis will be conducted by an independent laboratory, with the cost of same to be billed to the OWNER. 2. Analyze the removal data and compare these to the rated effectiveness of the treatment facilities at the throughput rates utilized. 3. Analyze treatment plant operations to determine if iron and manganese carrover can be reduced by plant operation changes or process modifica- tions. 4. Consider alternative methods of iron and manganese reduction and/or sequestering as a temporary, or permanent, solution. 5. Analyze, on an overview basis, the configuration of the distribution system as it affects the concentration of residual iron or mannanese in various portions of the City. 6. Present the findings of the investigation, together with cost data, for discussion and consideration. 7. Prepare and present a final report and recommendations. 8. Direct pilot plant testing program at Treatment Plant Nos. 2 and 3 to investigate manganese removal with potassium permanganate and analyze results. 9. Prepare summary report of pilot plant testing program and present recommendations for full-scale treatment plant alterations for manganese reduction at Treatment Plant Nos. 2 and 3. 10. Direct pilot plant testing program at Treatment Plant No. 1 to investigate manganese removal with potassium permanganate and analyze results. 11. Prepare summary report of pilot plant testing program and present recommenda- tions for full-scale treatment plant alterations for manganese reduction at Treatment Plant No. 1.