CCP 11-28-2006 - Laserfiche WebLink

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. . . .~ Re ort Number: A enda Section: Re ort Date Council Meetin November 22,2006 Date November 28 2006 the city that works for you REQUEST FOR COUNCIL CONSIDERATION ITEM DESCRIPTION: CONSIDERATION OF PROPOSED PLAN TO REDUCE RADIUM LEVELS A T WATER TREATMENT PLANT #4. DEPARTMENT HEAD'S APPROVAL: GMrN CITY MANAGER'S APPROVAL: No comments to su Recommendation: To approve the following for City Project 07-09, Water Treatment Plant #4 Filter Rehabilitation and Radium Removal: I. Accepting the plan to reduce radium levels in accordance with the Bilateral Compliance Agreement with the Minnesota Department of Health (MDH). 2. Accepting a proposal for design services and awarding a contract to Bonestroo, Rosene, Anderlik & Associates (BRA) in the amount of $54,000 for design and construction servIces. 3. Authorizing staff to prepare final plans and specifications. 4. Authorizing staff to advertise for bids. Legislative History: In 2004, the Minnesota Department of Health (MDH) notified the City that four of our deep drinking water wells were found to exceed the regulatory level of 5.4 picoCuries per liter for radium. In 2005, City water department personnel installed new special chemical feed equipment at City water treatment plants 3, 3A, 4 and 5 in hopes of reducing the radium to below the regulatory level. The chemical feed equipment was a minimal cost solution but unfortunately did not correct the radium problem. In August of 2005, the City received a Notice of Violation from MHD ordering the City to develop a plan to reduce the radium to acceptable levels. In conjunction with the MDH, the City signed a Bilateral Compliance Agreement with the Minnesota Department of Health (MDH). Essentially, the agreement states the City must return water treatment plants 3 & 3A to complicance in 2006, water treatment plant 4 in 2007, and water treatment plant 5 in 2008. A copy ofthe agreement is attached to this report. In 2006, the City removed the filter media in the two filters at water treatment plants 3 and 3A and replaced it with a finer filter material, inspected the filter interiors for corrosion and made coating repairs as necessary, and installed a different complex chemical feed system. The work was completed this summer and all initial test results are favorable and have reduced the radium levels below 5.4 picoCuries per liter for radium as required by the MDH.