Upper Occoquan Service AuthorityIssuing agency·Centreville, VA·via Virginia's eVA statewide eProcurement marketplacePhase 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 found in the Contract Documents.
Phase 1 includes retrofitting one L/2 Building carbon contactor, consisting of two cells, to serve as the 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 will include retrofitting the remaining seven carbon contactors (i.e., fourteen cells) with the selected improvements based on the results of Phase 1.
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["https://procure.cgieva.com/page.aspx/en/fil/download_public/804D28C0-6D66-41A9-B57B-96357926A601"]["<a href=\"\"https://procure.cgieva.com/page.aspx/en/fil/download_public/804D28C0-6D66-41A9-B57B-96357926A601\"\">UOSA IFB 27-01 L2 Carbon Front End Documents.pdf</a>"]["804D28C0-6D66-41A9-B57B-96357926A601"]["UOSA IFB 27-01 L2 Carbon Front End Documents.pdf"]["8406331"]["9/4/26"]["UOSA IFB 27-01 GAC Treatment Optimization"]["RFx Document"]Most Virginia work asks for the two below, and the solicitation documents are where it’s stated. Here’s what each costs through Light RFP if you need one.
Source: Virginia eVA (solicitation IV127897), retrieved via Virginia's eVA statewide eProcurement marketplace. View the official posting, and always confirm requirements and deadlines with the issuing agency.