Agmt25 H2O Solutions, L.L.C. - Laserfiche WebLink

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REV: 01-09-25 MI •Dry Film Thickness (DFT) readings of painted surfaces (roof and wall plates) B. Tank Cleaning The Contractor shall comply with latest American Water Works Association (AWWA) and other applicable industry standards for potable water tank cleaning. Cleaning shall be conducted with the tanks full, and bottom sediment shall be removed. Contractor shall include optional cost for disposal of sediment and sediment bags at an appropriate legal location of contractors’ choosing. The City reserves the right to dispose of sediment at its own expense. Rates shall include the removal of 3 inches of sediment, and a unit price for each additional inch of sediment if greater than 3 inches, cost for sediment bags, overtime costs, and a safety plan. Contractor shall provide equipment capable of cleaning and inspecting tanks, which shall consist of, but is not limited to, the following: •Two-way diver to surface communications. •Complete underwater lighting system. •Full-face mask and dry suit (chemical resistant). The diver shall be totally isolated from the potable water. •Equipment to disinfect diver and equipment before each dive. •Equipment for cleaning potable water storage tank. •Equipment shall be capable of removing flocculated material, silt, sediment, sand and debris from the floor of the tank. C. Post-Cleaning Inspection Following the cleaning of the tanks, the Contractor shall provide a post-cleaning inspection, noting new observations not previously recorded. Post-cleaning inspection shall be considered a part of the scope of work in any tanks cleaned. No separate payment shall be made for post-cleaning inspection. D. Repairs Contractor shall notify a PWS staff member the same business day after discovery of any structural damage that compromises the tank’s performance or ability to retain water. Should any areas be identified as needing minor repairs, the Contractor shall notify the designated representative of the Redwood City Water Division and provide a cost to complete the repairs. The City has the discretion to approve minor repairs while the contractor is on-site or postpone repairs for a later date. ATTY/AGR.2025.003/H2O Solutions, L.L.C. (Water Storage Tank Inspections and Cleaning) REV: 01-09-25 MI (Page 13 of 19)