Request to Advertise - WWTP Secondary and Disinfection Improvements Project No 119-069

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TO: FROM: SUBJECT: INTER -OFFICE MEMORANDUM' DEPARTMENT OF PUBLIC WORKS DIVISION OF UTILITIES Members of the Board of Public Works Eric Horvath, Director of Public Works Clara McDaniels, Board of Public Works Attorney Kara Boyles, City Engineer Al Greek, Director of Utilities Linda Martin, Clerk of Board of Public Works Jacob M. Klosinski, Assistant City Engineer Agenda Request Form —Title Sheet and Request to Advertis vti,„, Project No. 119-069 Wastewater Treatment Plant Secondary and Disinfection Improvements DATE: October 15, 2019 io. wwwwwwwwwwu�!��u�w�r�u�w�wwu�wuwmuuouumummmmmmmwrwuwwaivanwu�www�rum�m0000ioiw�oumowwwmuu�wr�wwwwa iou... � 0000iw�uuumwuwuuu�wuv�rv�wmiwio The Division of Engineering and Division of Utilities are requesting the Board of Public Works' approval of the Title Sheet and Request to Advertise for Project No. 119-069 WWTP Secondary Treatment and Disinfection Improvements. Background The City of South Bend Long Term Control Plan and Consent Decree (May 2012) requires the Wastewater Treatment Plant provide Secondary Treatment for 100 MGD peak flow rates. As part of this effort to upgrade the facility, Secondary Clarifiers, Aeration Basins, and Disinfection facilities require upgrades to improve the hydraulics and return activated sludge return rates to optimize treatment capacity. The engineering scope for the WWTP Secondary and Disinfection Improvement project will address the following major improvements: • Final Clarifiers 1-5: Replace sludge mechanism, drive motors, access walkways, isolated structural improvements, rehabilitate weirs, and replace handrails. • Aeration Basins 1-4: Replace Pass 1-2 Influent Gates and the drain gates at Aeration Tank 4. • Aeration Basins 1-4: Extend the length of the Aeration Basin effluent weirs. • Disinfection Building and Chlorine Contact Tanks: Increase capacity of chlorine and sulfur dioxide gas systems by adding evaporators, scrubbing equipment, and improvements to distribution piping. Advertisement Dates: November 8, 2019 and November 15, 2019 The funding source for the project is Utilities, Sewage Works Capital, Sewer Rehabilitation Account (642-0630-415-42-05) and Treatment and Disposal Equipment Account (642-0630-415-43-66). If there are any questions regarding the subject project, please contact Al Greek (Ext. 4210) at the Division of Utilities or Jacob M. Klosinski (Ext. 9496) at the Division of Engineering.