James W. Fowler Co. 12/1/2021 - Laserfiche WebLink

City of Everett,Washington I Reservoir 3 Structural Improvements PDB Project Progressive Design-Build Contract I Exhibit B.Owner's Project Criteria 5 Testing and Validation 5.1 Special Inspections for Refurbishment of Corroded Items The reservoir contains exposed, corroded rebar and the valve vault contains piping that has areas of rust. The Design-Builder shall refurbish the metal components of these features by removing visible rust scale and recoating. Metal components in the valve vault shall be abrasive blasted to remove existing coating material prior to recoating. After removal of rust scale and prior to recoating, the City may opt to conduct special inspections of some or all components to confirm readiness for recoating. Where appropriate, such inspections may include nondestructive tests (such as Bresle tests) to determine chloride surface concentrations on the prepared surface. Design-Builder shall coordinate this work and access with the City to allow for these special inspections. It is Contractor's responsibility to ensure that the correct materials and equipment are being provided and that the workmanship (including surface cleanings, coating removal and disposal, surface preparation, coating application, testing, and repairs) are being completed as required by the design documents. 5.2 Consistency with Design Requirements The Engineer of Record shall observe and validate that materials meet design specifications. 5.3 Inspections of Completed Work Design-Builder shall afford the City the opportunity and access to conduct post-repair inspections of all work, including testing to confirm repairs are sound and adhere to existing materials. 5.4 Liner Integrity Testing The Design-Builder shall coordinate with the City to observe reservoir liner integrity tests conducted by the City prior to and after completion of construction. Leakage will be baselined at a water depth — as indicated by the City's telemetry —of 18.0 feet (+/- 0.25 feet) prior to construction. To perform the pre-construction leakage baseline, all inlets and outlets to the reservoir will be closed, and leakage (based on changes in water surface elevation) will be observed for a 24 hour period using electronic level sensing instrumentation with data logging capability. Any change in water surface elevation over the course of the 24 hour observation period will be noted. If the pre-construction baseline testing identifies significant existing leakage, the City may elect to have a dive team seal off the reservoir outlets and repeat the baseline test to preclude valve leakage as a potential source of leakage. Also, the City may Page 9 of 12