Title
BID REVIEW - MINT FARM REGIONAL WATER TREATMENT PLANT DISSOLVED OXYGEN INJECTION
COUNCIL STRATEGIC INITIATIVE ADDRESSED:
Provide sustainable water quality & environmental infrastructure
SUMMARY STATEMENT:
This project was authorized by the City Council and the Beacon Hill Water and Sewer District (BHWSD) Board of Commissioners to help control scale release in the distribution system and improve the taste and odor of our municipal water supply. The project will install an automated air injection system to increase the dissolved oxygen concentration in the treated water leaving the Mint Farm RWTP. The air injection system will allow air to be injected into the raw water and/or the final treated water to optimize the treatment process, the quality of the finished water delivered to the distribution system, and control scale release in the distribution system.
On July 19, 2017, four bids were received as follows:
$ 874,516.03 - Tapani Inc., Battleground WA
$ 924,730.64 - Stettler Supply Company, Salem OR
$ 999,925.00 - Stellar J Corporation, Woodland WA
$ 1,038,570.75 - PCR Inc., Beaver Creek, OR
$ 700,000.00 - Engineer’s Estimate
All bids received were determined to be regular and responsive.
The total project cost is higher than budgeted for a variety of reasons, including the current bidding climate, the conceptual design was determined not feasible, and a second injection point was added to allow dissolved oxygen to be added to the raw water. Adding oxygen to the raw water will promote biological growth in the filters, which will reduce ammonia and hydrogen sulfide concentrations, and may reduce organic nitrogen concentrations, all of which will reduce taste and odor complaints from customers. A staff report is included explaining the project, cost estimates, and funding situation, along with related reports and information.
On August 2, 2017, at a joint meeting of the Water Operating Board and the BHWSD Board of Commissioners, both boards rev...
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