PUBLIC HEALTH ASSESSMENT
Evaluation of Leviathan Mine Site
LEVIATHAN MINE
MARKLEEVILLE, ALPINE COUNTY, CALIFORNIA
EPA FACILITY ID: CAD980673685
May 7, 2003
Prepared by:
California Department of Health Services
Under a Cooperative Agreement with the
Agency for Toxic Substances and Disease Registry
TABLE OF CONTENTS
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Use of Comparison Values
Surface Water
Groundwater
Fish and Wildlife
Sediment
Ambient Air
River Ranch
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Eliminated Exposure Pathways
Completed Exposure Pathways
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Exposure to Leviathan Mine contaminants via wading and swimming
Exposure to Leviathan Mine contaminants via consumption of surface waters
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Potential consumption of plants contaminated with Acid Mine Drainage
Potential consumption of fish contaminated with metals from Leviathan Mine
Potential consumption of groundwater contaminated with Acid Mine Drainage
Potential consumption of beef raised with waters contaminated by metals from Leviathan Mine
Potential consumption of wild game and fowl contaminated with metals from Leviathan Mine
Potential inhalation of contaminants from Leviathan Mine
Potential future exposure to Leviathan Mine contaminants via wading and swimming
Potential future consumption of surface waters contaminated by Leviathan Mine
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Toxicological Evaluation
Non-cancer Health Effects
Carcinogenic Health Effects
Children's Health Issues
Toxicological Evaluation of Completed Exposure Pathways
Evaluation Strategy
Exposure Dose Estimates and Health Effects Evaluation
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Table 1. Summary of Surface Water Data From 1968-1969
Table 2. Summary of Surface Water Data From 1981-1983
Table 3. Summary of Surface Water Data From 1995-2001
Table 4. Summary of Sediment Data Collected on May 12, 1983
Table 5. Summary of Sediment Data Collected in September 1998
Table 6. Summary of Completed Exposure Pathways at the Leviathan Mine
Table 7. Summary of Potentially Completed Exposure Pathways at the Leviathan Mine
Table 8. Summary of Exposure Dose Estimates for Completed Pathways in Adults
Table 9. Summary of Exposure Dose Estimates for Completed Pathways in Children
Table 10. Exposure Parameters Used in Estimating Exposure Risks
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Figure 1. GIS Topographic Map of the Leviathan Mine Site and Vicinity
Figure 2. 1999 Surface Water Sample Locations at Leviathan Mine and Associated Watershed
Figure 3. Narrative of Sampling Locations
APPENDIX C: TOXICOLOGICAL SUMMARIES FOR CHEMICALS FOUND NEAR LEVIATHAN MINE