Title
Resolution to Approve a Construction Contract with Commercial Contracting Corporation for the Water Resource Recovery Facility Ultraviolet (UV) Disinfection System Replacement Project (RFP No. 23-50, $5,030,600.00)
Memorandum
Attached for your approval is a resolution to approve a construction contract with Commercial Contracting Corporation (CCC), in the amount of $5,030,600.00 for the Water Resource Recovery Facility (WRRF) Ultraviolet (UV) Disinfection System Replacement Project.
The City of Ann Arbor WRRF currently uses a Trojan UV4000 disinfection system to disinfect the WRRF's final effluent. The current system has been in service since December 2000 and production of certain parts and maintenance items are being phased out by the manufacturer. In addition, the system has reached the end of its useful life and must be replaced.
On August 4, 2022, Council approved a Professional Services Agreement with Black & Veatch (B&V) to evaluate the existing operations, collect additional data and information, propose alternative UV disinfection systems and prepare contract documents for a replacement UV disinfection system based on the selected alternative.
During the preliminary design and UV disinfection equipment selection, it became apparent that we need to construct an enclosure for the UV disinfection system, which was not included in the original design scope. The existing system is located below a metal canopy and is essentially exposed to the weather. Routine maintenance such as changing a bulb or replacing a ballast must be done despite the inclement weather. The new UV disinfection system will utilize sophisticated features, including touch screen controls, UV sensors, and a mechanical bulb wiping system. By enclosing the new UV disinfection system within a metal structure, we believe that we can increase the longevity of the new equipment and provide the highest level of safety for our employees. On June 5, 2023, Council approved Amendment ...
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