The Division has prepared a table listing indoor air remediation goals and action levels for a number of volatile organic compounds to be used at sites where vapor intrusion may be a concern. This was prompted in response to the U.S. Environmental Protection Agency (EPA) having released a new assessment of the health effects of trichloroethene (TCE) and tetrachloroethene (PCE), two commonly used degreasing solvents.

This Community Involvement Plan revision for the Central City/Clear Creek Superfund Site is intended to reflect the changes, both actual and as perceived by the community, since the original 1989 plan was last revised in September 2004. This revision of the 2004 revision of the Community Involvement Plan, based on community interviews, describes the community involvement and public participation program developed for the Central City/Clear Creek Superfund...

The Colorado Hazardous Waste Regulations require that releases of hazardous waste to the environment (soil, groundwater, or surface water) be remediated. The corrective action plan provides owners and operators of sites where releases have occurred with a streamlined mechanism to quickly address these releases without the need for a formal agreement or permit from the Department.

This Proposed Plan identifies the preferred alternative for OU4 water treatment. The mining-impacted waters of Gregory Gulch, Gregory Incline and National Tunnel are acidic and contain high concentrations of heavy metals. This proposed amendment calls for construction of a new water treatment plant designed and operated specifically to treat discharges from the National Tunnel and Gregory Incline, as well as base surface water flow and alluvial ground...

The selected remedy for OU4 addresses contaminated surface water, ground water, and sediment from mine waste piles within the Study Area. The cleanup strategies will address threats through the capping or removal of waste piles and treatment of point and non-point sources of surface water contamination.