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3. Softening water treatment plant including chemical addition, filtration for iron and <br />manganese removal, backwash reclamation and high service pumps. <br />D. Alternate No. 4 - Wells with individual iron and manganese removal plants: <br />1. Treatment plant to serve one well located on same site and adjacent to a trunk water <br />main. <br />2. Prairie du Chein well with submersible pump. <br />3. Iron and manganese removal plant including chemical addition, filtration, backwash <br />reclamation and high service pumps. If pressure filters are used, high service pumps <br />are not required. <br />We propose to investigate these alternatives and provide preliminary cost estimates at our <br />contract per diem rates for an estimated cost of $3,500. <br />Yours very truly, <br />BONESTROO, ROSENE, ANDERLIK & ASSOCIATES, INC. <br />22614- <br />Richard W. Foster <br />RWF:1i <br />372.cor <br />Page 2. <br />Page 57 <br />