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Board approves $680,000 change order for water treatment plant upgrades
Summary
The board approved Change Order 5 for the city water treatment plant, covering items including a vacuum prime system (~$88,000), chemical room modifications (~$122,000) and a major filter media conversion to granular activated carbon (GAC) (largest item, roughly $300,000).
Roger (staff member) presented Change Order 5 to the board for the water treatment plant, with a total value discussed in the meeting of roughly $680,000. Major line items included a vacuum prime system (about $88,000) that was not part of the original design but is necessary for raw water pump priming, changes to the chemical room and relocation/separation of a polyphosphate tank to meet electrical and safety clearances (roughly $122,000), and a change to the filter media to granular activated carbon (GAC) to improve taste, odor and removal of emerging contaminants (the largest single line item, discussed at roughly $300,000). Roger said one smaller line item (~$15,000) resulted from an engineering omission and the engineer will reimburse the city.
Board members discussed the need for corrective changes and safety risk reductions; the motion to approve the staff recommendation passed on a voice vote. Staff invited board members to tour the plant to review work in progress.
Why it matters: The changes address operational and safety deficiencies discovered during construction and will affect the plant’s ability to remove taste/odor compounds and emerging contaminants; the conversion to GAC is a longer‑term water‑quality investment.
What’s next: Staff will implement change order work as scheduled and incorporate reimbursements from the design engineer as discussed.
