Opportunity timeline

PostedSep 4, 2026
DeadlineOct 6, 2026

In plain English

The Upper Occoquan Service Authority is seeking a contractor for Phase 1 of a granular activated carbon treatment optimization project in Centreville, Virginia. The work includes converting one two-cell carbon contactor into a PFAS pilot system, restoring upflow and downflow operation, and evaluating carbon transfer improvements. If authorized, Phase 2 would retrofit seven additional contactors with the selected improvements. Responses require a free eVA vendor sign-in.

About this opportunity

Phase 1 of the GAC Treatment Optimization Project includes, but is not limited to, retrofitting one L/2 Building carbon contactor, consisting of two cells, to serve as the per- and polyfluoroalkyl substances (PFAS) pilot study system; restoring upflow and downflow operating capability through modifications to the existing underdrain nozzle system; and implementing a proof-of-concept evaluation for carbon transfer improvements. If authorized by the Owner, Phase 2 of the Project will include, but is not limited to, retrofitting the remaining seven carbon contactors (i.e., fourteen cells) with the selected improvements based on the results of Phase 1. A complete description of the Work can be…

Time remaining

Closes Oct 6, 2026

22Days
:
08Hours
:
40Min
:
29Sec

Related Opportunities

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Ref No.

BS-4DF484