City Council Meeting Date: August 2, 2016
To: Mayor and City Council
City Administrator
From: David Bennet, PE, Public Works Director/City Engineer
Doug Lien, Utilities Manager
Richard Kucera, Wastewater Plant Foreperson
Title
Consideration to Approve Plans and Specifications and Authorize Advertisement for Bids for the 2016 Wastewater Treatment Plant's Ultra Violet Disinfection Process.
Body
Action Requested:
Staff recommends approval of the Resolution Approving Plans and Specification and Authorizing Advertisement for Bids for the 2016 Wastewater Treatment Plant's Ultra Violet Disinfection Process.
Summary Report:
The Northfield City Council is being asked to approve plans and specifications and authorize advertisements for bids for the 2016 Wastewater Treatment Plant's Ultra Violet Disinfection Process. This improvement has been identified by the Wastewater Treatment Plant (WWTP) Facility Study that was adopted by the City Council on February 16, 2016. Plans and specifications may be viewed on the City's website project page - http://ci.northfield.mn.us/index.aspx?NID=1072
The existing UV system requires on-going maintenance, and the manufacturer has indicated they will stop providing support to this model within the next year. It is recommended that the existing UV equipment be replaced during the non-disinfection period of the UV process. Within the City of Northfield's permit from the Minnesota Pollution Control Agency, the non-disinfection period takes place from November 1 through March 31 of every year.
During the non-disinfection period, the WWTP Facility Study indicated the replacement of the UV system would include the removal of the existing units, modifications of the channel to accommodate the new units, and installation of the new UV units and power supplies. In addition, upgrades would be made to the SCADA system to accommodate system monitoring.
Alternative Options:
The City Council could decide not to go forward with the pr...
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