Superfund Information Systems: Site Profile

Superfund Site:

CALIFORNIA GULCH
LEADVILLE, CO

Contaminant List

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EPA has identified the chemical substances (i.e., hazardous substances, pollutants or contaminants) listed below as contaminants of concern (COCs) for the site. COCs are the chemical substances found at the site that EPA has determined pose an unacceptable risk to human health or the environment. These are the substances evaluated by EPA to be addressed by cleanup actions at the site.

To identify COCs, EPA:

  • Identifies people and ecological resources that could be exposed to contamination found at the site;
  • Determines the amount and type of contaminants present; and
  • Determines the human health or ecological effects that could result from contact with the contaminants.

The list of COCs provided below come from EPA’s remedy decisions for this site. This list may not reflect a modification to these decisions that removes a contaminant from the COC list. Also, after the decision, a COC may have been cleaned up. The COCs are displayed for the OU numbers indicated in the original decision document. OU numbers may change over time.

EPA is working to improve data quality. The information presented on this page is undergoing review for accuracy and completeness, and may be subject to change.

The following ATSDR Profile links exit the site Exit
Contaminant Name Contaminated
Media
Area of Site Found
(Operable Unit)
More Information CAS #
ARSENIC Groundwater SMELTERS/MILL SITES (05) ATSDR Profile 7440-38-2
ARSENIC Groundwater HAMM'S TAILINGS/PENROSE DUMP (06) ATSDR Profile 7440-38-2
ARSENIC Groundwater OREGON GULCH (10) ATSDR Profile 7440-38-2
ARSENIC Groundwater SITE-WIDE WATER QUALITY (12) ATSDR Profile 7440-38-2
ARSENIC Liquid Waste HAMM'S TAILINGS/PENROSE DUMP (06) ATSDR Profile 7440-38-2
ARSENIC Other DRG & W SLAG PILES (03) ATSDR Profile 7440-38-2
ARSENIC Sediment OREGON GULCH (10) ATSDR Profile 7440-38-2
ARSENIC Soil SMELTERS/MILL SITES (05) ATSDR Profile 7440-38-2
ARSENIC Soil APACHE TAILINGS (07) ATSDR Profile 7440-38-2
ARSENIC Soil OREGON GULCH (10) ATSDR Profile 7440-38-2
ARSENIC Solid Waste SMELTERS/MILL SITES (05) ATSDR Profile 7440-38-2
ARSENIC Solid Waste HAMM'S TAILINGS/PENROSE DUMP (06) ATSDR Profile 7440-38-2
ARSENIC Surface Water UPPER CAL GULCH (04) ATSDR Profile 7440-38-2
ARSENIC Surface Water OREGON GULCH (10) ATSDR Profile 7440-38-2
CADMIUM Groundwater YAK TUNNEL (01) ATSDR Profile 7440-43-9
CADMIUM Groundwater SMELTERS/MILL SITES (05) ATSDR Profile 7440-43-9
CADMIUM Groundwater OREGON GULCH (10) ATSDR Profile 7440-43-9
CADMIUM Groundwater SITE-WIDE WATER QUALITY (12) ATSDR Profile 7440-43-9
CADMIUM Other DRG & W SLAG PILES (03) ATSDR Profile 7440-43-9
CADMIUM Sediment OREGON GULCH (10) ATSDR Profile 7440-43-9
CADMIUM Soil SMELTERS/MILL SITES (05) ATSDR Profile 7440-43-9
CADMIUM Soil OREGON GULCH (10) ATSDR Profile 7440-43-9
CADMIUM Soil ARKANSAS FLOOD PLAIN (11) ATSDR Profile 7440-43-9
CADMIUM Solid Waste SMELTERS/MILL SITES (05) ATSDR Profile 7440-43-9
CADMIUM Solid Waste ARKANSAS FLOOD PLAIN (11) ATSDR Profile 7440-43-9
CADMIUM Surface Water YAK TUNNEL (01) ATSDR Profile 7440-43-9
CADMIUM Surface Water UPPER CAL GULCH (04) ATSDR Profile 7440-43-9
CADMIUM Surface Water OREGON GULCH (10) ATSDR Profile 7440-43-9
CADMIUM Surface Water SITE-WIDE WATER QUALITY (12) ATSDR Profile 7440-43-9
COPPER Groundwater OREGON GULCH (10) ATSDR Profile 7440-50-8
COPPER Sediment OREGON GULCH (10) ATSDR Profile 7440-50-8
COPPER Soil ARKANSAS FLOOD PLAIN (11) ATSDR Profile 7440-50-8
COPPER Solid Waste ARKANSAS FLOOD PLAIN (11) ATSDR Profile 7440-50-8
COPPER Surface Water YAK TUNNEL (01) ATSDR Profile 7440-50-8
COPPER Surface Water UPPER CAL GULCH (04) ATSDR Profile 7440-50-8
COPPER Surface Water OREGON GULCH (10) ATSDR Profile 7440-50-8
COPPER Surface Water SITE-WIDE WATER QUALITY (12) ATSDR Profile 7440-50-8
IRON Sediment OREGON GULCH (10)   7439-89-6
LEAD Groundwater HAMM'S TAILINGS/PENROSE DUMP (06) ATSDR Profile 7439-92-1
LEAD Groundwater OREGON GULCH (10) ATSDR Profile 7439-92-1
LEAD Groundwater SITE-WIDE WATER QUALITY (12) ATSDR Profile 7439-92-1
LEAD Liquid Waste HAMM'S TAILINGS/PENROSE DUMP (06) ATSDR Profile 7439-92-1
LEAD Other DRG & W SLAG PILES (03) ATSDR Profile 7439-92-1
LEAD Sediment OREGON GULCH (10) ATSDR Profile 7439-92-1
LEAD Soil DRG & W SLAG PILES (03) ATSDR Profile 7439-92-1
LEAD Soil SMELTERS/MILL SITES (05) ATSDR Profile 7439-92-1
LEAD Soil APACHE TAILINGS (07) ATSDR Profile 7439-92-1
LEAD Soil RESIDENTIAL SOIL (09) ATSDR Profile 7439-92-1
LEAD Soil OREGON GULCH (10) ATSDR Profile 7439-92-1
LEAD Soil ARKANSAS FLOOD PLAIN (11) ATSDR Profile 7439-92-1
LEAD Solid Waste SMELTERS/MILL SITES (05) ATSDR Profile 7439-92-1
LEAD Solid Waste HAMM'S TAILINGS/PENROSE DUMP (06) ATSDR Profile 7439-92-1
LEAD Solid Waste ARKANSAS FLOOD PLAIN (11) ATSDR Profile 7439-92-1
LEAD Surface Water YAK TUNNEL (01) ATSDR Profile 7439-92-1
LEAD Surface Water UPPER CAL GULCH (04) ATSDR Profile 7439-92-1
LEAD Surface Water OREGON GULCH (10) ATSDR Profile 7439-92-1
LEAD Surface Water SITE-WIDE WATER QUALITY (12) ATSDR Profile 7439-92-1
MANGANESE Groundwater SITE-WIDE WATER QUALITY (12) ATSDR Profile 7439-96-5
MERCURY Soil ARKANSAS FLOOD PLAIN (11) ATSDR Profile 7439-97-6
METALS Groundwater UPPER CAL GULCH (04)   E17001751
METALS Surface Water SMELTERS/MILL SITES (05)   E17001751
SULFATE Groundwater UPPER CAL GULCH (04)   14808-79-8
SULFATE Groundwater OREGON GULCH (10)   14808-79-8
SULFATE Sediment OREGON GULCH (10)   14808-79-8
SULFATE Surface Water UPPER CAL GULCH (04)   14808-79-8
SULFATE Surface Water OREGON GULCH (10)   14808-79-8
ZINC Groundwater YAK TUNNEL (01) ATSDR Profile 7440-66-6
ZINC Groundwater UPPER CAL GULCH (04) ATSDR Profile 7440-66-6
ZINC Groundwater OREGON GULCH (10) ATSDR Profile 7440-66-6
ZINC Groundwater SITE-WIDE WATER QUALITY (12) ATSDR Profile 7440-66-6
ZINC Other DRG & W SLAG PILES (03) ATSDR Profile 7440-66-6
ZINC Sediment OREGON GULCH (10) ATSDR Profile 7440-66-6
ZINC Soil SMELTERS/MILL SITES (05) ATSDR Profile 7440-66-6
ZINC Soil OREGON GULCH (10) ATSDR Profile 7440-66-6
ZINC Soil ARKANSAS FLOOD PLAIN (11) ATSDR Profile 7440-66-6
ZINC Solid Waste SMELTERS/MILL SITES (05) ATSDR Profile 7440-66-6
ZINC Solid Waste ARKANSAS FLOOD PLAIN (11) ATSDR Profile 7440-66-6
ZINC Surface Water YAK TUNNEL (01) ATSDR Profile 7440-66-6
ZINC Surface Water UPPER CAL GULCH (04) ATSDR Profile 7440-66-6
ZINC Surface Water OREGON GULCH (10) ATSDR Profile 7440-66-6
ZINC Surface Water SITE-WIDE WATER QUALITY (12) ATSDR Profile 7440-66-6

About CAS #

Chemical Abstracts Service (CAS) is a division of the American Chemical Society. CAS builds and maintains the largest and most current database of chemical substance information in the world. These chemical substances are labeled with CAS Registry Numbers® (CASRNs or CAS Numbers) and are used internationally as unique numeric identifiers for a single substance. They have no chemical significance and, because they are widely used, are a link to a wealth of information about a specific chemical substance. They are provided here for reference purposes to hopefully aide you in researching the respective chemical. For more information, visit the CAS Web site. Exit

About ATSDR

The Agency for Toxic Substances and Disease Registry (ATSDR) is an agency of the U.S. Department of Health and Human Services. ATSDR is charged under the Superfund law (CERCLA) to assess the presence and nature of health hazards at specific Superfund sites, to help prevent or reduce further exposure and the illnesses that result from such exposures, and to expand the knowledge base about health effects from exposure to hazardous substances. ATSDR maintains a series of fact sheets and profiles about contaminants of concern commonly found at Superfund sites. Links to these resources are provided above when available. For more information, visit the ATSDR Web site. Exit

About EPA’s IRIS

The Integrated Risk Information System (IRIS), prepared and maintained by the U.S. Environmental Protection Agency (U.S. EPA), is an electronic database containing information on human health effects that may result from exposure to various chemicals in the environment. IRIS was initially developed for EPA staff in response to a growing demand for consistent information on chemical substances for use in risk assessments, decision-making and regulatory activities. The information in IRIS is intended for those without extensive training in toxicology, but with some knowledge of health sciences. For more information, visit the EPA IRIS Web site.

About EPA’s SRS

The Substance Registry System (SRS) is the Environmental Protection Agency's (EPA) central system for information about regulated and monitored substances. The system provides a common basis for identification of chemicals, biological organisms, and other substances listed in EPA regulations and data systems, as well as substances of interest from other sources, such as publications. The system does not provide health hazard information at this time. For more information, visit the EPA SRS Web site.

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