IMCO General Construction 5/9/2022

City of Everett,Washington I Water Filter Plant- Phase 2 Capital Upgrades PDB Project Progressive Design-Build Contract I Exhibit B.Owner's Project Criteria Exhibit B Water Filter Plant — Phase 2 Capital Upgrades Project City of Everett, Washington Owner's Project Criteria 1 General The Design-Builder shall conform design and construction to the requirements and performance criteria identified in this Exhibit. During design or construction, the Design- Builder may propose modifications to the Owner's Project Criteria. Any such modifications are subject to the approval of the City. 2 Project Scope: The Project scope consists of the following: • Design and construction of Screenhouse Valves Replacement • Design and construction of PUD Return Line Flow Meter • Design and construction of PUD Return Line Control Valves • Design and construction of Old #5 Line Cross Connect Improvements • Design and construction of Flocculation Basin Improvements • Design and construction of Alum and Polymer Storage Tanks Replacement • Design and construction of Hydrofluosilicic Acid (Fluoride) Storage Tanks Replacement and Fluoride Building HVAC Improvements • Design and construction of Clearwell Flow Diversion Structure Valves Replacement • Design and construction of East Clearwell Gate Improvements Screenhouse Valves Replacement: The screenhouse valve work includes the replacement of four butterfly valves buried immediately south of the screenhouse, ISBV3, ISBV4, ISBV5 and ISBV6 as shown in Figure 1 . These valves function as the separation and flow control at the junction of four pipes and include two 48" diameter valves on the PUD return line and two 42" diameter valves at the point of separation between the raw water system and the potable water in Old #5 line, which is held in reserve for emergency situations. The valves are all buried approximately 17 feet deep (invert of valve) with no protective vaults. Planned improvements include replacement of Page 1 of 16