Agenda Item Wording:
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Authorize the City Manager to award a sole source purchase order for the repair and replacement of piping components of Digester #4 at the Water Reclamation Facility (WRF) to W.M. Lyles Company for a not to exceed amount of $284,000 and appropriate an additional $150,000 from the Wastewater Fund (431) to CIP Digester Cleaning & Equipment Repairs (CP9768).
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Deadline for Action: 5/15/2023
Submitting Department: Public Works
Contact Name and Phone Number:
Wyndi Ferguson, Public Works Manager, wyndi.ferguson@visalia.city, 713-4186
Nick Bartsch, Public Works Director, nick.bartsch@visalia.city, 713-4052
Department Recommendation:
Authorize the City Manager to award a sole source purchase order for the repair and replacement of piping components of Digester #4 at the Water Reclamation Facility (WRF) to W.M. Lyles Company for a not to exceed amount of $284,000 and appropriate an additional $150,000 from the Wastewater Fund (431) to CIP Digester Cleaning & Equipment Repairs (CP9768).
Background Discussion:
In May 2022 the sludge recirculation line to Digester 4 located at the Water Reclamation Facility (WRF) began to leak, To stop the leak and allow for repairs, the levels within Digester 4 needed to be brought down below the point of the leak. As the emergency beds at the Plant were eliminated during the upgrade project, the only way to safely mitigate the issue was to drain the digester contents back to the headworks and recirculate them back through the plant process. This operation was accomplished over several days and lowered the content level to the point of the pipe failure, causing the spray to stop. The recirculation of the sludge caused some adverse reactions within the plant, so the remainder of the digester could not be emptied through this process. At that point, the digester was deemed unusable and taken off-line. To prevent further upset to ongoing operations, staff slowly and incrementally pumped out the rem...
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