Virginia's eProcurement Marketplace #IFB 127897 (IFB-127897)

GAC treatment optimization and carbon contactor retrofit

The Upper Occoquan Service Authority is seeking improvements to its granular activated carbon treatment system at the L/2 Building in Centreville, Virginia. - Government buyer: Upper Occoquan Service Authority; no sub-agency or specific office is identified. - Requested services: - Phase 1: Retrofit one carbon contactor made up of two cells for use as a PFAS pilot system; modify the existing underdrain nozzle system to restore upflow and downflow operation; and evaluate carbon-transfer improvements through a proof-of-concept effort. - Conditional Phase 2: If authorized by the Authority, retrofit seven additional contactors comprising fourteen cells, applying improvements selected based on Phase 1 results. - OEMs and vendors: No OEMs, product manufacturers, or vendors are named in the notice. - Products and part numbers: No specific products or part numbers are listed; the complete scope is in the contract documents. - Notable requirement: Phase 2 work depends on Authority authorization and the outcome of the Phase 1 evaluation.

Description

Phase 1 of the GAC Treatment Optimization Project includes retrofitting one L/2 Building carbon contactor, consisting of two cells, to serve as the PFAS pilot study system. Work also includes restoring upflow and downflow operating capability through modifications to the existing underdrain nozzle system and evaluating carbon transfer improvements. If authorized by the Owner, Phase 2 will retrofit the remaining seven carbon contactors (fourteen cells) with selected improvements based on Phase 1 results. The complete description of the work is in the Contract Documents.

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