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 Criterion Requirement Service Life and 1. Reservoir cover improvements shall be designed for materials and installation Durability techniques consistent with an expected service life of 30 years for the overall reservoir cover, and 15 years for any specific instance of concrete patching. 2. Mechanical components shall be designed to be compatible with existing City components and to be consistent with an expected 30-year minimum service life. 3. Design shall be consistent with low incidence of failure and ease of maintenance. Ventilation 1. Vents shall be corrosion resistant, tamper proof, and protected from vandalism. 2. Design vents to minimize the potential for water intrusion. Design to prevent bird, animals, insects, excessive dust, and other potential vector and contaminant intrusion. 3. Design vents in accordance with AWWA and WSDOH standards, including the WSDOH Water System Design Manual. 4. Vents shall be easily accessible for inspection and cleaning by City staff. 5. Vents shall be sized and located to provide improved ventilation in the reservoir interior and reduce the humidity and chlorine content of air in the reservoir. 6. Vents shall be sized to provide sufficient air flow to accommodate peak water inflow or outflow rates. Documentation 1. Design-Builder shall document existing cover conditions (interior and exterior) of Existing prior to field investigations, and coordinate with the City to document existing Conditions liner conditions while the reservoir is filled. 2. Design-Builder shall re-document both existing cover conditions and liner conditions after Reservoir 3 has been drained and prior to beginning construction. 3. As described in Section 5.4 of this Exhibit, Design-Builder shall observe a City- led pre-construction baseline liner integrity test, based on measurement of Reservoir 3 water level, conducted over 24 hours. The Design-Builder shall observe a post-construction repeat of the liner integrity test. Protection of 1. Design-Builder shall take all necessary measures to protect existing Existing infrastructure (e.g., reservoir cover, foundation, liner, and valve vault)from Infrastructure damage during field investigations and construction. Measures shall address the risk of falling concrete, and damage from materials or equipment mobilized by the Design-Builder. 2. Design-Builder shall preserve City access to operate and maintain on-site facilities not under active construction, and avoid actions that would impair operation of the water system as a whole (exclusive of City-coordinated Reservoir 3 outage). Protection of 1. Reservoir 3 will be in active service during field investigations. Design-Builder Water Quality shall use methods to contain debris and dust from field investigations and During Field testing activities, and avoid the introduction of debris, dust, and any other Investigations foreign materials into potable water stored in the reservoir. Any safety-related equipment or materials that are anticipated to contact the water surface (e.g., and tethers)shall be disinfected. Disinfection shall be completed prior to entry to the Construction City's satisfaction. 2. For on-site construction work that occurs while Reservoir 3 is active, the same water quality protection requirements apply. Page 6 of 12