# Colorado VSS #RFP-FAAA-2027000068-3

Groundwater Monitoring and Assessment Support for the California Gulch Superfund Site

**Posted:** October 22, 2026
**Respond By:** November 25, 2026
**Identifier:** RFP-FAAA-2027000068-3
**NAICS:** 541620, 562910

Colorado is seeking technical support for groundwater monitoring and assessment at the California Gulch Superfund Site.
- **Government buyer:** State of Colorado, through Colorado VSS; Denver, Colorado.
- **Scope:** Technical support for monitoring and assessing groundwater conditions across the California Gulch (CalGulch) Superfund Site.
- **OEMs and vendors:** No product manufacturers, OEMs, or commercial vendors are named in the opportunity.
- **Products and quantities:** No products, part numbers, or quantities are specified.
- **Notable requirements:** The work concerns groundwater monitoring and assessment at a Superfund site; further technical requirements are not provided in the available summary.

### Description

This Request for Proposals seeks qualified Offerors to provide technical support for activities at the California Gulch Superfund Site. Work will include support services for monitoring and assessing groundwater conditions across CalGulch. The notice states that Modification #2 added Addendum 1 Questions and Responses and Modification #2 to the RFP; all else remains the same.

[View original listing](https://prd.co.cgiadvantage.com/PRDVSS1X1/Advantage4)