California Gulch Groundwater Monitoring

The Colorado Department of Public Health and Environment (CDPHE) is seeking a qualified contractor to provide technical support for groundwater monitoring at the California Gulch Superfund Site in Lake County, Colorado. The work includes maintaining the existing groundwater monitoring network, operating an early‑alert mine‑pool system, and delivering data and reporting to meet the Record of Decision requirements for Operable Unit 12. The contract is a fixed‑price, one‑year award starting Feb 1 2027, with the possibility of up to four additional one‑year extensions, and an annual budget of roughly $75,000 (up to $375,000 over five years). • Provide routine groundwater sampling, analysis, and reporting. • Maintain and calibrate the groundwater monitoring network and early‑alert mine‑pool system. • Update and manage the public groundwater monitoring website. • Meet all state accessibility, insurance, and reporting requirements. • Demonstrate at least five years of experience in groundwater monitoring at Superfund or mining sites, with three completed projects of similar scope.