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contaminant and depending on which well or combination of wells in operation. <br />Planning for water treatment will occur within the design of the RTC site. Funding for a <br />water treatment facility needs to be identified concurrent with approval for the RTC. <br />This facility should be on line consistent with 60% of the RTC site or completion of wells <br />#6 and #7. <br />Table 13.5: Water System Quality Data <br />Parameter <br />Average Level of <br />Water Quality <br />Parameter' <br />Primary <br />Drinking Water <br />Standard <br />Secondary <br />Drinking Water <br />Standard <br />Langelier Index (standard unit) <br />Total Iron (mg/1 as Fe) <br />Manganese (mg/1 as Mn) <br />Calcium (mg/1 as Ca) <br />Calcium Hardness (mg/1 as <br />CaCO3) <br />Magnesium (mg/1 as CaCO3) <br />Magnesium Hardness (mg/1 as <br />CaCO3) <br />Total Hardness (mg/1 as <br />CaCO3) <br />Sodium (mg/1 as Na) <br />Arsenic (mg/1 as As) <br />Chloride (mg/1 as Cl) <br />Sulfate (mg/1 as SO4) <br />Total Alkalinity (mg/1 as <br />CaCO3) <br />pH (Standard Unit) <br />Total Dissolved Solids (mg/1) <br />0.43 <br />0.87 <br />0.21 <br />58 <br />145 <br />12 <br />0.3 <br />0.05 <br />50 <br />195 <br />8 <br />0.006 <br />15 <br />4.83 <br />221 <br />7.9 <br />210 <br />0.010 <br />250 <br />400 250 <br />(1) Based on data collected on 4/6/99 and extrapolated from the <br />addition, each parameter has been normalized based on average <br />for each well. <br />6.5 — 8.5 <br />500 <br />1999 Water System Study. In <br />annual pumping times and rates <br />The City currently adds chlorine, fluoride, and polyphosphate to the raw water at each <br />well -house. Chlorine is added as a protective barrier against harmful pathogens that may <br />enter the water system from the raw well water or through breaks or cross connections in <br />the distribution system. Fluoride is added as a dietary supplement that aids in the <br />prevention of tooth decay. Polyphosphate is added to prevent the precipitation of iron <br />and, to a lesser extent, manganese primarily for aesthetic purposes, such as color, and to <br />prevent the staining of plumbing fixtures and laundry. <br />Water Distribution. The City's water distribution system is comprised of 6-, 8-, 10-, 12- <br />and 16-inch ductile iron pipe. The system includes various accessary appurtenances such <br />as isolation valves, altitude/pressure valves, and fire hydrants. In 1999, the distribution <br />system was analyzed by Bolton and Menk, Inc., using the CYBERNET Hydraulic <br />13-4 <br />