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PUBLIC HEALTH ASSESSMENT

CITY OF PERRYTON WELL NO. 2
(a/k/a PERRYTON WATER WELL NUMBER 2)
PERRYTON, OCHILTREE COUNTY, TEXAS


CONCLUSIONS

  1. Currently, the Perryton Water Well Number 2 site does not pose a public health hazard because water from the well is not being used and has not been used since the well was disconnected from the city water supply in June 1989.
  2. In the past Perryton Water Well Number 2 posed an indeterminate public health hazard. Available data indicate that in the past some of the contaminants have or may have exceeded health-based comparison values; however, the data were insufficient to reliably reconstruct possible past exposures.
  3. Future use of water from Well Number 2 prior to treatment and blending could pose a public health hazard. The primary contaminants of concern for future use are carbon tetrachloride and nitrates. Chronic exposure to carbon tetrachloride at the concentrations measured in Well Number 2 could result in an estimated low to moderate increased lifetime risk for developing cancer. Since infants are particularly sensitive to the possible effects of exposure to nitrates, ingestion of this water by infants could result in exposure doses well within the range of doses that have been found to cause methemoglobinemia.

PUBLIC HEALTH ACTION PLAN

Actions Planned

  1. EPA plans to begin the Remedial Investigation and Feasibility Study to determine the nature and extent of contamination in the soil and groundwater at this site.
  2. EPA plans to treat the water from Well Number 2 by an appropriate method to remove the carbon tetrachloride and its breakdown products. The water from Well Number 2 will be blended with other well water to reduce the overall nitrate concentration to below 7 ppm.

Actions Recommended

  1. The City of Perryton should continue to limit access to the area around Well Number 2.
  2. The private water well approximately 1,200 feet southwest of Well Number 2 should be tested for site contaminants (specifically carbon tetrachloride and its breakdown products, atrazine, and nitrate/nitrite nitrogen). ATSDR/TDH should evaluate these results and provide the evaluation to EPA and the owner of the well.

PREPARERS OF THE REPORT

Susan L. Prosperie, M.S., R.S.
Health Assessor
Environmental Epidemiology and Toxicology Division

John F. Villanacci, Ph.D.
Director
Environmental Epidemiology and Toxicology Division

Adriana Rhames
Community Involvement Liaison
Environmental Epidemiology and Toxicology Division

Dixie Davis
Administrative Technician
Environmental Epidemiology and Toxicology Division

ATSDR Regional Representative

George Pettigrew
Senior Regional Representative
ATSDR - Region 6


CERTIFICATION

This Public Health Assessment was prepared by the Texas Department of Health under a cooperative agreement with the Agency for Toxic Substances and Disease Registry (ATSDR). It is in accordance with approved methodology and procedures existing at the time the Public Health Assessment was initiated.

Alan W. Yarbrough
Technical Project Officer, SPS, SSAB, DHAC, ATSDR

The Division of Health Assessment and Consultation, ATSDR, has reviewed this Public Health Assessment and concurs with its findings.

Richard Gillig
Chief, State Programs Section, SSAB, DHAC, ATSDR


REFERENCES

  1. HRS Documentation Record. City of Perryton Well Number 2, Ochiltree County, Texas. TX0001399435. Volume I and II. Prepared by the TNRCC Site Assessment Section Superfund Site Discovery and Assessment Staff for the US Environmental Protection Agency Region VI. September 1998.

  2. Agency for Toxic Substances and Disease Registry (ATSDR). 1994. Toxicological profile for carbon tetrachloride. Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service.

  3. Expanded Site Inspection Report. City of Perryton Well Number 2, Perryton, Texas. EPA CERCLA ID NO.: TX0001399435. Prepared by Roy F. Weston, Inc for EPA. November 1996.

  4. Environmental Protection Agency. City of Perryton Water Well Number 2 Texas EPA ID# TXD0001399435. Site Update. March 16, 1999.

  5. U.S. Environmental Protection Agency. Site Update. City of Perryton Well No. 2 Superfund Site. Proposed Plan of Action. August 12, 1999.

  6. Texas Department of Health. Record of Communication. Susan Prosperie (TDH) to Vincent Malott, EPA Region 6 Project Manager City of Perryton Well No. 2 site. October 4, 1999.

  7. 1990 U.S. Census Data Database C90STF3BandC90STF1A, Summary Level State-Place

  8. The Dallas Morning News. 1993. The 1994-95 Texas Almanac and State Industrial Guide. 672 pages.

  9. Perryton, Texas, Water Supply. Ted Dodd. http://www.ci.perryton.tx.us/pty_ch/water/water_supply.html. August 6, 1997.

  10. Texas Department of Health. Health Risk Assessment and Toxicology Program. Record of communication between EPA Remedial Project Manager and Texas Department of Health regarding domestic well(s) in the vicinity of the Perryton Water Well Number 2. November 13, 1998.

  11. Agency for Toxic Substances and Disease Registry. Public Health Assessment Guidance Manual. 1992.

  12. Texas Department of Health. Health Risk Assessment and Toxicology Program. Record of communication between EPA Remedial Project Manager and Texas Department of Health regarding lead as artifact of well equipment. May 25, 1999.

  13. McKone TE. 1987. Human exposure to volatile organic compounds in household tap water: the indoor inhalation pathway. Environ Sci Technol 21:1194-1201.

  14. Smialowicz RJ, Simmons JE, Luebke RW, et al. 1991. Immunotoxicologic assessment of subacute exposure to rates to carbon tetrachloride with comparison to heptotoxicity and nephrotoxicity. Fund Appl Toxicol 17:186-196.

  15. Bruckner JV, MaKenzie WF, Muralidhara S, et al. 1986. Oral toxicity of carbon tetrachloride: acute, subacute and subchronic studies in rats. Fund Appl Toxicol 6:16-34.

  16. Environmental Protection Agency. 5 May 1998. URL: http://www.epa.gov/iris/subst/0209.htm Safe Drinking Water Fact Sheet for Atrazine.

  17. HSDB - Hazardous Substances Data Bank. Information on Atrazine. Compiled by the National Library of Medicine, an agency of the Department of Health and Human Services. It contains copyrighted materials. All Rights Reserved. 1988-1999.

  18. Environmental Protection Agency. 5 May 1998. URL: http://www.epa.gov/iris/subst/0076.htm Safe Drinking Water Fact Sheet for Nitrate.

  19. Dorsch MM, Scragg RKR, MCMichael AJ, et al. 1984. Congenital malformations and maternal drinking water supply in rural South Australia: a case-control study. J Epidemiol 119:473-486.

  20. Arbuckle TE, Sherman GJ, Corey PN, et al. 1988. Water nitrates and CNS birth defects: a population-based case-controlled study. Arch Environ Health. 43:162-167.

  21. Craun, GF, DG Greathouse and DH Gunderson. 1981. Methemoglobin levels in young children consuming high nitrate well water in the United States. Int. J. Epidemiol. 10(4): 309-317.

  22. NAS (National Academy of Sciences). 1981. The health effects of nitrate, nitrite and N-nitroso compounds. National Academy Press, Washington, DC.

  23. Texas Department of Health Record of Communication between Peter Langlois of the Texas Birth Defects Monitoring Division TDH to Susan Prosperie Environmental Epidemiology and Toxicology Division. July 12, 1999.

  24. Texas Department of Health. Letter from Barry Wilson of the TDH Cancer Registry Division to a citizen of the City of Perryton. August 18, 1994.

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