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Li li MINNESOTA DEPARTMENT OF HEALTH <br /> MDHSECTION OF DRINKING WATER PROTECTION <br /> i of Public Water Supply Inventory Report <br /> System Name: Elk River Survey Date: 12/21/2016 <br /> PWSID: 1710004 Surveyor: Kim Larsen, P.E. <br /> System Contact: Eric J.VoIk PWS Type: Community <br /> Treatment Information <br /> TREATMENT PLANT#5 <br /> Type Treatment Plant Source Water: Groundwater <br /> Status: Active Design Capacity: 1,000 Gallons per Minute <br /> Availability: Primary Emergency Capacity: 1,000 Gallons per Minute <br /> Operating Rate: 1000 Gallons per Minute <br /> Treatment Objective Treatment Process Mechanism <br /> Disinfection Chlorine/Gas <br /> Fluoride(Z) Fluoridation/Hydrofluosilicic acid <br /> Iron removal Filtration(Pressure)/Rapid sand <br /> Oxidation-chemical/Chlorine <br /> TREATMENT PLANT#6 <br /> Type: Treatment Plant Source Water: Groundwater <br /> Status: Active Design Capacity: 1,000 Gallons per Minute <br /> Availability: Primary Emergency Capacity: 1,000 Gallons per Minute <br /> Operating Rate: 1000 Gallons per Minute <br /> Treatment Objective Treatment Process Mechanism <br /> Disinfection Chlorine/Gas <br /> Fluoride(Z) Fluoridation/Hydrofluosilicic acid <br /> Iron removal Filtration (Pressure)/Anthracite/Greensand <br /> Oxidation-chemicaUChlorine <br /> Manganese removal Filtration(Pressure)/Anthracite/Greensand <br /> Oxidation-chemical/Sodium permanganate <br /> TREATMENT PLANT#7 <br /> Type: Treatment Plant Source Water: Groundwater <br /> Status: Active Design Capacity: 1,000 Gallons per Minute <br /> Availability: Primary Emergency Capacity: 1,000 Gallons per Minute <br /> Operating Rate: 1000 Gallons per Minute <br /> Treatment Objective Treatment Process Mechanism <br /> Disinfection Chlorine/Gas <br /> Fluoride(Z) Fluoridation/Hydrofluosilicic acid <br /> Iron removal Filtration(Pressure)/Anthracite/Greensand <br /> Oxidation-chemical/Chlorine <br /> Oxidation-chemical/Potassium permanganate <br /> Manganese removal Filtration(Pressure)/Anthracite/Greensand <br /> Oxidation-chemical/Sodium permanganate <br /> Other Backwash recycle <br /> 12/27/2016 Page 6 of 9 <br /> 157 <br />