Downey Planet bids #143021

Engineering Services and Equipment for Downey PFAS Water Treatment Plants

The City of Downey Utilities Division is seeking a consultant to provide engineering services for systemwide PFAS water supply treatment improvements, including the design of two treatment plants and associated infrastructure. - Government Buyer: - City of Downey Utilities Division (Public Works - Utilities Division) - OEMs and Vendors Mentioned: - Trojan Technologies (UVAOP Flex 100 Units) - Prospective engineering firms: BKF Engineers, Citadel Environmental Services, Civiltec Engineering, Ninyo & Moore - Products/Services Requested: - Two PFAS treatment plants using Ion Exchange (IX) media with pretreatment filters - North Plant: 4 IX trains, 6,400 gpm flow - South Plant: 6 IX trains, 9,600 gpm flow, includes UVAOP treatment for 1,4-dioxane - Five 40,000-lb Granular Activated Carbon (GAC) vessels for peroxide quenching - Two Trojan UVAOP Flex 100 Units for advanced oxidation - Pretreatment bag/cartridge filters (multiple duty/standby units) - Chemical storage and feed systems (hydrogen peroxide tanks and metering pumps) - Raw and treated water pipelines (up to 42-inch diameter) - Seismic retrofit and rehabilitation of a 5 MG reservoir and pump station - Professional engineering services: construction plans, specifications, estimates, and record drawings - Unique/Notable Requirements: - Must achieve PFOS/PFOA below 4.0 ng/L, PFBS below 500 ng/L, PFHxS below 3 ng/L, PFHxA below 1 ug/L - South Plant must treat 1,4-dioxane to 0.8 ug/L using UVAOP - Project is partially federally funded and must comply with U.S. EPA Region 9 procurement requirements - Encouragement of small, minority, WBE, and labor surplus area firm participation - Staged construction and operational flexibility between two plants - Detailed cost estimates and construction staging included in referenced analysis

Description

This Request for Proposal (RFP) seeks a Consultant to provide professional engineering services for PFAS treatment improvements to the City's northerly and southerly water supply systems. The scope includes design of treatment plants, influent and product water pipelines, and associated improvements. The project aims to reduce PFAS contaminants in groundwater to meet regulatory standards and is partially funded by federal funds, requiring compliance with U.S. EPA Region 9 procurement rules. The Consultant will prepare construction plans, specifications, estimates, and record drawings.

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