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O .'^ `� ro vj E =' yyp�� a N N T d .- LD C Q Y cu (D O N cli 0 C O O C as Cl) F a 0 u H W a - m r i H 3 ri 3 i v o > Lo > 00 of Ll W U Mayor Robert E. Simison ILIA City Council Members: EN� Luke Cavener Liz Strader Brian Whitlock Doug Taylor John Overton Anne Little Roberts TO: Mayor Robert E. Simison Members of the City Council FROM: Laurelei McVey, Public Works Director DATE: 03/09/2026 SUBJECT: FY26 NET ZERO BUDGET AMENDMENT FOR THE TERTIARY FILTER EQUALIZATOIN TANK RECOAT PROJECT REQUESTED COUNCIL DATE: 03/17/2026 I. RECOMMENDED ACTION A. Move to: 1. Approve the net zero budget amendment for the Tertiary Filter Equalization Tank Recoat Project. 2. Authorize the Mayor to sign the agreement II. DEPARTMENT CONTACT PERSONS Laurelei McVey, Director of Public Works 208-489-0365 III. DESCRIPTION A. Background The Public Works Department is completing a planned FY26 project to rehabilitate, repair, and recoat the old Reclaimed Water bolted steel tanks to be used as equalization tanks for the new Tertiary Filtration project. The Tertiary Filtration Project is a permit required project necessary to meet the 2027 IPDES discharge permit limits and is currently under construction. Using the old Reclaimed Water tanks as flow equalization is an important cost saving measure to allow the City to install fewer tertiary filtration membrane skids to meet peak flows. Page I of 2 The Department analyzed the interior of the tanks to estimate the necessary rehabilitation work needed; however,there was additional corrosion on the ceiling bolts and support brackets that was not visible until side panels on the tanks were removed to allow for the rehabilitation work. The cost of repairing these additional tank components is $133,500. Failure to rehabilitate the ceiling bolts and brackets could result in an eventual collapse of the tank roofs. B. Reason for Amendment The contractor is currently working on the tanks which are drained, out of service, and have the side panels removed. It is advantageous to compete this unanticipated additional work now rather than waiting for FY27. IV. IMPACT There is currently over $1.9M of uncommitted remaining contingency funding in the Tertiary Filtration Project. That project is nearing completion (est Oct 2026) and is not expected to utilize all of the remaining contingency funds. This budget amendment proposes to move $133,500 from the Tertiary Filtration Project to the WRRF Plant Maintenance account (where the tank recoat project is funded) to complete this work. These tanks will be a critical component to the Tertiary Filtration process once operational. Tank Recoating Project Original Project Budget(FY26 Budget Request) $366,700 Additional Funding Needed to Complete Work $133,500 Total Project Budget 1 $500,200 Tertiary Filtration Project Funding FRemaining Uncommitted ContingencyFundin -$1.9M V. ALTERNATIVES Delaying the additional rehabilitation work is possible; however, it has several disadvantages that should be considered. It will likely be more expensive to have a contractor remobilize to the site and perform the work at a later date. Taking the tanks down at a later date will be more complicated since the Tertiary Filtration Project will be completed at that time and the tanks will be in use requiring a process flow shut down which could impact permit compliance. Page 2 of 2