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3 <br />3.1 <br />Current treatment at the wells consists of chemical treatment including polyphosphate for iron <br />and manganese sequestration, gas chlorine for disinfection, and fluoride for dental health. <br />Pilot Study <br />The pilot study was conducted in the SEH pilot water plant trailer. Equipment used for the pilot <br />study included chemical feed systems, an aerator, detention tank, and filter columns (filters). <br />Train 1 of the study utilized direct filtration where the well water was treated with chemical <br />injections of chlorine (sodium hypochlorite) and potassium permanganate, and then filtered <br />through filters with two different media types. Train 2 of the study utilized the chemical injections <br />and two different filter media types, but included aeration prior to the chemical injections, and <br />detention prior to filtration. Sampling as part of the pilot study were conducted and analyzed by <br />SEH's pilot plant operator. <br />Pilot Testing Processes <br />The pilot study was conducted for Ramsey's Wells No. 3 and 4 to establish the efficiency and <br />reliability of the two treatment processes and filter media types to remove iron and manganese. <br />Processes for the pilot study were selected based on the concentrations of iron and manganese, <br />and on prior experience. The figures below show the processes for Train 1 and Train 2. <br />Figure 1 - Pilot Sudy Train 1 <br />Well <br />Water <br />Chlorine <br />KMn04. <br />Filtration <br />PILOT STUDY REPORT RAMSY 154354 <br />Page 2 <br />