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Public Works hears updates on tank paint failure, belt press operation, well vacuum system and odor remedies
Summary
Staff reported peeling paint on two water storage tanks linked to a likely bad paint batch, confirmed the belt press is operational after repairs, discussed a vacuum injection system for wells to reduce chlorine spray exposure, and revisited wastewater odor concerns and a proposed hydrogen peroxide treatment option.
The City of Washington Public Works meeting included several infrastructure updates: paint peeling on two tanks, equipment repairs, a pilot-like well injection project and continuing discussion of a wastewater odor issue.
Tank paint: Staff reported that the Clay Street and Enduro tanks are experiencing large-area paint peeling that reveals the zinc primer; the problem appeared on the same side of both tanks. Staff said both tanks were painted from the same batch of paint and that the paint supplier (named variously in the transcript) has collected samples and pledged to lead repairs. Staff warned visible blotches will remain until spring when remedial work can occur.
Belt press: The board heard that the belt press used for sludge processing is running after an electrical issue was resolved; staff said the unit was effectively rebuilt by the manufacturer and should provide long service life.
Well injection/vacuum system: Staff described setup work on wells 4 and 11 for a vacuum injection system intended to reduce operator exposure to sprayed chlorine. Additional piping and booster components remain to be installed; work was slowed by a crew illness. Staff said the approach is relatively uncommon locally and may represent a broader operational change.
Wastewater odor and remediation: Multiple attendees discussed persistent sewage odors linked to landfill leachate and mixed discharges; one attendee suggested, as an experimental remedy, injecting concentrated hydrogen peroxide (speaker estimated ~54% strength) to attack odors, but noted the chemical would require hazardous-material transport and be expensive. Staff indicated options are being evaluated and sought a path to a decision by year-end.
No formal actions were taken on these items at this meeting beyond directing staff to continue investigations and work with suppliers and contractors on repairs and installations.
