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PUBLIC HEALTH ASSESSMENT

KENNECOTT (SOUTH ZONE)
COPPERTON, SALT LAKE COUNTY, UTAH


CONCLUSIONS AND RECOMMENDATIONS

The Agency for Toxic Substances and Disease Registry (ATSDR) has identified seven exposure situations for the Kennecott Utah Copper South National Priorities List (NPL) Site (Table 2). One exposure situation, Butterfield Creek, is considered a past and current public health hazard until the on-going removal and remediation is complete. Residents on 30 properties identified for soil removal may have been exposed to high levels of lead from contaminated soils.

Though mitigated, one exposure situation (Southwest Jordan Groundwater), is considered a past public health hazard because a few people used a private drinking water well with concentrations above the 1500 ppm EPA Region VIII recommended risk level. In addition to providing alternative water supplies, Kennecott's comprehensive well inventory, groundwater monitoring, and private well testing programs have greatly reduced the potential for human exposure to concentrations of sulfate above 1500 parts per million.

Present and future conditions of soils in the Bingham Creek area are considered as no apparent public health concern because of the successful removal of highly contaminated soils by Kennecott, the Environmental Protection Agency (EPA), and the Atlantic Richfield Company (ARCO). Before removal actions, the floodplain and lower channel areas of Bingham Creek contained contaminated soils that may have posed a public health hazard. The surface soils in the Copperton area are classified as no apparent health hazard because the contaminant concentrations, frequency and duration of exposure, and opportunity for human exposure are not sufficient to generate adverse health effects in the residential population. There was not sufficient information to determine a public health hazard for one of the exposure situations (Pine Canyon Groundwater); it is categorized as indeterminate public health hazards.

In response to a Bingham Creek resident's concern about his family's exposure to the lead contaminated soils in his yard, ATSDR evaluated the soil-lead levels and the family's blood lead measurements. The soil lead levels identified may have been high enough to result in health effects if there were frequent exposure to the contaminated soil. However, the results of the blood lead testing indicate that significant exposures were not occurring at that time because blood lead concentrations were below the concern level of 10 micrograms per deciliter (µg/dL). It is not possible to determine whether significant exposures (i.e., above 10 µg/dL) could have occurred at another time.

ATSDR recommends the following:

1. For the public health hazard associated with the sulfate contaminants in Southwest Salt Lake County, Kennecott's on-going mitigative measure of private well testing and provision of alternative water should be continued.


PUBLIC HEALTH ACTIONS

The Salt Lake County Health Department and the Utah Department of Health have conducted all public health actions appropriate based on past and current conditions and information. If new information indicates a change of site conditions, the Agency for Toxic Substances and Disease Registry (ATSDR) will re-evaluate the site for any appropriate additional public health actions.


PREPARERS OF THE REPORT

John Crellin, PhD
Environmental Health Scientist
Superfund Site Assessment Branch
Division of Health Assessment and Consultation

Don Gibeaut
Environmental Health Engineer
Superfund Site Assessment Branch
Division of Health Assessment and Consultation

John Mann
Hydrologist
Superfund Site Assessment Branch
Division of Health Assessment and Consultation

ATSDR Regional Representative:
Glenn Tucker
Public Health Advisor
Region VIII


REFERENCES

  1. U.S. Environmental Protection Agency. Site background. Undated.

  2. U.S. Environmental Protection Agency. Removal Assessment Report, Copperton Soils. July 11, 1994.

  3. U.S. Environmental Protection Agency. Action memorandum: Request for a time-critical removal action at the Bingham Creek channel - phase two site; West Jordan and South Jordan, Salt Lake County, Utah, PRP-lead removal action. January 28, 1993

  4. Kennecott Utah Copper. Drawing 453-T-194 titled: Bingham Creek channel, 4800 West to 3200 West, pre-removal/check samples, area A. July 1993.

  5. Kennecott Corporation. Letter to director of (Utah) Bureau of Emergency Response and Remediation, concerning 116 soil samples. October 29, 1990.

  6. U.S. Environmental Protection Agency. Data table titled: Bingham Creek channel sampling, preliminary data. May 9, 1991.

  7. Author not stated. Bingham Creek channel site, tailings/soil analyses - 1990. October 5, 1990. Undated.

  8. Utah Department of Environmental Quality. Analytical results report, Bingham Creek channel and Bingham Creek/Anaconda tailings. September 9, 1991.

  9. Kennecott Corporation. Letter transmitting laboratory data for 1990 Bingham Creek sampling to Utah Bureau of Emergency Response and Remediation. November 6, 1990.

  10. Author not stated. Bingham Creek channel site, residential parks, soils analyses. October 12, 1990.

  11. Author not stated. List of samples taken on bike path between 4800 West and Skye Drive. Undated

  12. U.S. Environmental Protection Agency. Memorandum to ATSDR, with Meadow Greens playground 1991 resampling data. March 14, 1995

  13. U.S. Environmental Protection Agency. Data table titled: Bingham Creek-1992 residential sampling program. Undated.

  14. Kennecott. Letter to Ross Pino, subject: Copperton soil samples. April 8, 1994.

  15. Sverdrup Corporation. Data summary report for soil sampling activities performed at Copperton. June 17, 1994.

  16. Kennecott Utah Copper. Memorandum, subject: Jason Berrett property, Copperton. September 1, 1993.

  17. Kennecott Plant Projects Group. Bingham Creek post removal sampling report, 4800 west to 3200 west, June to December, 1993. Undated.

  18. Environmental Science & Engineering, Inc. Closure report, Bingham Creek channel site. March 1995

  19. U.S. Bureau of the Census. 1991. Census of population and housing, 1990: summary tape file 1 (Utah) {machine-readable data files]. Washington, D.C.

  20. Utah Department of Health. Results of Bingham Creek Blood Lead Testing. Bureau of Epidemiology, Utah Department of Health. November 5, 1990.

  21. University of Cincinnati. Datasets for Bingham Creek Channel study. Cover letter from Bornschein RL to Dorward-King E. December 14, 1994.

  22. EPA. Endangerment Assessment for Bingham Creek, Utah. Phase III Remediation. Superfund Management Branch, Hazardous Waste Management Division, EPA Region VIII, Denver, CO. July 1995.

  23. University of Cincinnati. Work Plan. Environmental and Human Health Lead and Arsenic Exposure Study for Bingham Creek Area. September 20, 1993.

  24. Letter from Dorward-King E (Kennecott Utah Copper) to Howie M (ATSDR). Review of ATSDR Public Health Assessment for Kennecott-South Zone, Copperton. August 19, 1996.

  25. ATSDR. Toxicological Profile for Arsenic. Update Atlanta, Georgia: U.S. Department of Health and Human Services, Public Health Service, TP-92/02. 1993.

  26. ATSDR. Toxicological Profile for Cadmium. Update Atlanta, Georgia: U.S. Department of Health and Human Services, Public Health Service, TP-92/06. 1993.

  27. ATSDR. Toxicological Profile for Lead. Update. Atlanta, Georgia: U.S. Department of Health and Human Services, Public Health Service, TP-92/12. 1993.

  28. ATSDR. Toxicological Profile for Copper. Atlanta, Georgia: U.S. Department of Health and Human Services, Public Health Service, TP-90/08. 1990.

  29. Sverdrup. Preliminary Risk Evaluation of Sulfate. Report for the Bingham Creek/Ground Water. Jordan Valley, Utah. St. Louis: Sverdrup Corporation. EPA Contract No. 68-W9-0032. February 1993.

  30. Kennecott Copper Corporation, July 1992, Groundwater Data Set from the Groundwater Assessment Report, Southwestern Jordan Valley Area.

  31. Henningsen, Gerry, USEPA Memorandum to Eva Hoffman, EPA RPM, Kennecott Site, July 3, 1997, Proposed Toxicological Risk-Based Concentrations of Sulfate for the Risk Assessment and as a Drinking Water Action Level at Kennecott Utah Copper.

  32. Henningsen, Gerry, USEPA Memorandum to Johanna Miller, EPA OSC. Imminent and Substantial Endangerment to Health of Children Exposed to Heavy Metal Contamination in Residential Soils at Herriman, Utah, July 31, 1997

DOCUMENTS AND INFORMATION REVIEWED BUT NOT CITED

  1. U.S. Environmental Protection Agency. Unilateral Administrative Order for Bingham Creek Channel, Phase II Site. February 18, 1993 (contains enclosed February 10, 1993 Statement of Work).

  2. Kennecott Corporation. Letter to ATSDR describing company removal objectives. March 20, 1995.

  3. Riedel Environment Services, Inc. Bingham Creek channel work plan. Undated.

  4. U.S. Environmental Protection Agency. Memorandum, subject: on-scene coordinator's report on CERCLA removal action at the Bingham Creek channel - phase 1 site. May 2, 1994.

  5. Kennecott Corporation. Bingham Creek Channel site, Phase II site, removal action (a work plan), Bingham Flats area. April 1993.

  6. Kennecott Corporation. Memorandum from Ivan Weber to Elaine Dorward-King, Subject: ATSDR information requests dated 1-4-95 and 1-17-95. January 24, 1995.

  7. Kennecott Utah Copper. Drawing 453-T-171 titled: Holy Cross Jordan Valley hospital, Bingham Creek channel, sample location map, samples HC-1 thru HC-22. February, 1992.

  8. Kennecott Utah Copper. Drawing 453-T-181 titled: Bingham Creek channel, Holy Cross Jordan Valley hosp., post removal sampling locations and results. July, 1992.

  9. U.S. Environmental Protection Agency. Statement of work, removal action - Bingham Creek channel site. Undated.

  10. U.S. Environmental Protection Agency. Letter and Transmittal, Unilateral Administrative Order, Docket No. CERCLA VII-95-19, Bingham Creek channel - Phase III. July 17, 1995.

  11. U.S. Environmental Protection Agency. Action memorandum, subject: request for a removal action at the Jordan View Estates subdivision of the Bingham Creek channel site. May 7, 1991.

  12. Utah Division of Drinking Water. Public water supply information system, water system number 108005. January 3, 1995.

  13. U.S. Environmental Protection Agency. Toxic release inventory data base.1991.

  14. Ecology and Environment, Inc. Memorandum: sampling activities report for Bingham Creek channel. May 31, 1991.

  15. Kennecott Utah Copper. Drawing 451-T-302, revision A: regional tailings study area near well #109 and UP&L Oquirrh substation. Undated.

  16. Kennecott Plant Projects Group. Bingham Creek soil sampling on Inter State Brick and Salt Lake County Gravel Plant Property. February 3, 1994.

  17. Kennecott Corporation. Memorandum: Bingham Creek characterization, samples BCT-1 through BCT-4. June 3, 1993.

  18. Author not stated. Sample data, figures, and plat maps representing sampling conducted at 9000 South and 3200 West. Undated.

  19. Kennecott Corporation. December 1994, transmittal letter with document titled: Statement about non-Kennecott property. Undated.

  20. Evirocon, Inc. Bingham Creek channel-site T4, removal action, final air monitoring report, 4800 West to 3200 West. February 4, 1994.

  21. Ecology & Environment, Inc. Memorandum: Bingham Creek channel-phase II, air monitoring results. October 15, 1993.

  22. Kennecott Corporation. December 20, 1994, transmittal letter with portions of document entitled: notice of completion and final report for AOC site No. T.4, Holy Cross Jordan Valley Hospital air sampling. Undated.

  23. American West Analytical Laboratories. Several Laboratory analysis data sheets. 1991.

  24. Kennecott Corporation. Copperton air monitoring data sheets. 1990 to 1994.

  25. Utah Division of Water Quality. Water quality data sheets for Jordan River. 1975 to 1994.

  26. Utah Division of Water Quality. Water quality data sheets for Bingham Creek. 1994.

  27. U.S. Fish and Wildlife Service. Memorandum concerning Jordan River fish data. February 8, 1995.

  28. Environmental Science & Engineering, Inc. Removal work/sampling and analysis plan, Bingham Creek channel site, phase 2. April 1993.

  29. Esteban E, Rubin CH, McGeehin MA, Flanders WD, Baker MJ, and Sinks T. Evaluation of human health effects associated with elevated sulfate levels of sulfate in drinking water: a cohort investigation in South Dakota. National Center for Environmental Health, Center for Disease Control and Prevention. Unpublished manuscript.

  30. U.S. Environmental Protection Agency (EPA). Drinking Water: National Primary Drinking Water Regulations--Sulfate; National Primary Drinking Water Regulation Implementation. 40 CFR Parts 141, 142, and 143. 59 Federal Register 65578, December 20, 1994.

  31. Stallones RA. Epidemiology and Environmental Hazards. in (Gordis L and Libauer CH, eds) Epidemiology and Human Risk Assessment. Oxford: Oxford University Press. 1988.

  32. Paustenbach DJ. A survey of health risk assessment. in (Paustenbach DJ, ed) The Risk Assessment of Environmental Hazards. A Textbook of Case Studies. New York: John Wiley and Sons. 1989.

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