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2023.11.14 WS Packet
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2023.11.14 WS Packet
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PUBLIC WORKS PROJECTS <br /> <br />Department: Water <br /> <br />Item: Treatment Plants 3, 4, & 5 and Well House 8 Building Improvements <br />A. Treatment Plant 3A Filter Rehab/Radium Removal <br />B. WTP 3A & 4 Backwash Reclamation Project <br />Well 10, 11, 12 Building Maintenance and Improvements <br /> <br />Year: 2016 (Item A) <br />2016 (Item B) <br />Portions of Item A and all of B delayed based on use of deep wells during <br />interim response to 1,4-Dioxane <br />2024 & 2030 (Building Improvements) <br /> <br />Cost: 2016-$375,000, (Item A.) <br />2016-$250,000, (Item B.) <br />Portions of Item A and all of B delayed based on use of deep wells during <br />interim response to 1,4-Dioxane <br />Building Improvements (exterior treatments) <br />2024-$200,000 <br />2028 - $70,000 Well 12 Roof <br />2030-$80,000 Well 10 Roof <br />2031 - $125,000 Well Building Improvements (Paint, Windows) <br />2031 - $125,000 Well 11 Roof <br /> <br />Description: The three iron removal plants were built in the mid 1980’s to supply <br />water to the City during negotiations with the Army. These plants and their respective <br />wells draw water out of the deeper Mount Simon / Hinckley aquifer. Well House 8 was <br />also modified and drilled deeper at this time. The City entered into a water remediation <br />agreement with the Army in 1990 and built a separate facility, the PGAC Plant, which <br />has supplied over 95% of the City’s water since then. The facilities needing attention <br />supply water during the hot dry summer months and are capable of supplying all the <br />cities water if a catastrophic failure should occur at the PGAC Water Treatment Plant. <br /> <br />In 2004, the Minnesota Department of Health (MDH) notified the City that four of our <br />deep drinking water wells were found to exceed the regulatory level of 5.4 picoCuries per <br />liter for radium. In 2005, City water department personnel installed new special chemical <br />feed equipment at City Water Treatment Plants 3, 3A, 4 and 5 in hopes of reducing the <br />radium to below the regulatory level. The chemical feed equipment was a minimal cost <br />solution but unfortunately did not correct the radium problem. In August of 2005, the <br />City received a Notice of Violation from MHD ordering the City to develop a plan to <br />reduce the radium to acceptable levels. <br /> <br />In conjunction with the MDH, the City signed a Bilateral Compliance Agreement with <br />the Minnesota Department of Health (MDH). Essentially, the agreement stated the City <br />13
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