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-2- <br />anti economic roaanns. Attached please find pages 183 and 194 of a <br />paper entitled, "Ozunatinn of a Municipal groundwater Supply to <br />Reduce iron, Manganese and Trihalom,•thane Formation", by Dwayne <br />A. Rnllaq, Civil Fnqineerinq Department Head, South Dakota State <br />University. Th.+ attached two pages discuss why the presence of <br />iron and manganese is nhjeclionahie. When Well No. 3 is cperatina <br />and this temporary system is installed, there still will be some <br />manganese related problemn. However, they will not he as severe <br />as the manganese prohlems in the past. I also want to point out <br />that the iron is, and will he, removed to below the MHD recom- <br />mended standards. <br />The cost of installinq a potassium permanganate chemical feed <br />system is as follows: <br />Furnish and Install chemical Feed System <br />and In -Line Mixer 5 24,000.00 <br />Draft and Type Plans and Specifications $ 3,000.00 <br />Contingency <br />c 3,nnn.nn <br />,,STIMA'rFD TOTAL COST T 30,000.00 <br />Since the cost of the project exceeds $15,000.00, outside contrac- <br />tors will hid the project. Plans will he prepared in-house by <br />hiring a full-time, temporary civil engineering technician <br />student. I recommend hiring Joe Klein for this position which <br />would last approximately 3 weeks. His rate of pay would be 55.G0 <br />per hour. Staff would like to do the typing in-house, but if the <br />following time schedule cannot be met, I recommend hiring a secre- <br />tary on a contract basis to complete the typing. The combined <br />cost of drafting a typing will not exceed 53,000.00. <br />The schedule for this project is as follows: <br />1. Complete Plans and Specifications July 25, 1986 <br />2. Minnesota Health Dept. Approval August 22, 1986 <br />3. Open Bids September 16, 1986 <br />4. Award Bids September 22, 1986 <br />5. Complete Construction November 7, 1986 <br />An option to installinq the potassium permanganate chemical feed <br />equipment on a temporary basis and continuina to find a better <br />method to remove manganese from the drinking water at Well No. 3 <br />is to construct a new well. The estimated cost for constructing a <br />new well is approximately $300,000.00. If the construction of a <br />new well alternative is selected, we cannot he sure of the quality <br />