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OWASA/Mason Farms WWTP Fermenter Mixing Improvements

February 9 @ 1:00 pm



OWASA has made changes to the pre-bid meeting and bid dates as follows:

Mandatory Pre-Bid Meeting: 11:00am, January 14, 2021

Bids Due: 1:00pm, February 9, 2021






Orange Water and Sewer Authority
Mason Farms WWTP Fermenter Mixing Improvements
CIP Project No. 278-78
Issue Date: December 7, 2020

Orange Water & Sewer Authority (OWASA) is inviting contractors to submit a bids for improvements at the Mason Farms Waste Water Treatment Plant (WWTP). This is a lump sum bid with qualification requirements.

The entire advertisement for bidders is located on the OWASA web site ( and may be downloaded at

The primary objectives of the project are to provide:
 Demolition of existing pipe, mixing headers, standpipe, and structural supports inside the fermenter tank.
 Demolition submersible pumps and piping.
 Removal and support of section concrete floor.
 Excavation and demolition of underground fermenter gas condensate pipe and drip trap.
 Installation of new mixing equipment, including pumps, valves, and piping.
 Rerouting digester gas piping.
 New digester gas condensate accumulator, drain and vent piping.
 Repair and coating of corroded sampling hatches in the fermenter cover.
 Electrical demo and installation for power, controls, and instrumentation.
 SCADA system improvements., as defined in the CITI scope of supply (Appendix C).
 Repair of Fermenter Tank concrete wall and coating.

A mandatory Pre-Bid Meeting will be held at 10:30 a.m. on December 16, 2020.

Responses to the Request for Bids must be received by 1:00 p.m. on February 9, 2021.



February 9
1:00 pm
Event Category: