CITY COUNCIL AGENDA ITEM
Memo Date: August 23, 2021
Agenda Date: September 28, 2021
Prepared By: Sean McFarland, Water Treatment Manager
Through: John A. Walsh, P.E., Utilities Director
Requested Action:
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To Approve Task Order No. 2021-21 to Jacobs Engineering Group, Inc. to Provide Engineering Services for the Design and Permitting of a New Ammonium Sulfate Storage and Feed System at the Viera Booster Station, Project No. WS21VP.
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BACKGROUND:
The City of Cocoa Water Utilities Department owns and operates a two-million-gallon storage tank in Viera. The storage tank is used by the Dyal WTP to store additional water, boost the water pressure when needed, and to help assist in fire flows should the fire department need hook up and draw water from a hydrant in the area.
An important part of the operations of the Viera Booster Station includes ensuring there is an adequate chlorine disinfection residual, by using chloramines, so the water is deemed safe for human consumption. Chloramines are a combination of ammonium sulfate and sodium hypochlorite. Presently, the Dyal plant can only inject sodium hypochlorite at the Viera Booster Station.
Based on an analysis performed by Jacobs of the City's potable water distribution system water quality data, both injection of sodium hypochlorite and ammonium sulfate are required to boost chloramine residuals in the distribution system. Therefore, a new ammonium sulfate storage and feed system is required at the Viera Booster Station to boost chloramine residual in the distribution system near the site.
The Viera Booster Station Chloramination Improvements project originally had $43,808 allotted for the project design. Staff is will transfer additional funds within the same Account Number 421-4055-536.63-00 from Project No. WS21OZ to Project No. WS21VP to fund Task Order #2021-21 which is projected to cost $84,494. A change order to the purchase order will be completed in FY22.
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