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HEALTH CONSULTATION

WELSH RESERVOIR
MOUNT PLEASANT, TITUS COUNTY, TEXAS


CONCLUSIONS

  1. There is no clear indication of an overall change in selenium concentrations in fish tissue over the 12 years of investigation. The maximum average concentration of 4.4 ppm selenium occurred in 1987. The average concentration of selenium in Welsh Reservoir fish in 1998 is 2.7 ppm.

  2. Depending on body weight (10-30 kg), children could consume approximately one-half to one and one-half (four ounce) meals of Welsh Reservoir fish per week before exceeding the MRL. Adults (70 kg) consuming approximately one and one-half to two (eight ounce) meals of Welsh Reservoir fish per week would not be expected to exceed the MRL. Approximately three times these amounts would be required to exceed the lowest levels reasonably expected to result in signs and symptoms of toxicity, therefore, ingestion of fish at these amounts pose no apparent public health hazard.

RECOMMENDATIONS

  1. The fish consumption advisory issued for Welsh Reservoir in 1992 should be re- evaluated based on the current recommended limitations on long-term fish consumption.

REFERENCES

  1. IRIS, 1998. Integrated Risk Information System. U.S. Environmental Protection Agency, Office of Health and Environmental Assessment, Environmental Criteria and Assessment Office. Cincinnati, Ohio.

  2. ATSDR, 1996. Agency for Toxic Substances and Disease Registry. Toxicological Profile for Selenium. Atlanta: ATSDR, Aug. 1996.

  3. Lemly, 1985. Toxicology of selenium in a freshwater reservoir: Implications for environmental hazard evaluation and safety. Ecotoxicol. Environ. Safety 10:314-338.

  4. Welsh, et al., 1981. Selenium in self-selected diets of Maryland residents. J. Am. Diet Assoc. 79-277-85.

  5. FNB, NRC, 1980. Food and Nutrition Board, National Research Council: Recommended dietary allowances, 9th ed. Washington, D.C: National Academy of Sciences.

  6. Longnecker, et.al., 1991. Selenium in diet, blood, and toenails in relation to human health in a seleniferous area. Am. J. Clin. Nutr. 53:1288-94.

  7. Yang, et.al., 1983. Endemic selenium intoxication of humans in China. Am. J. Clin. Nutr. 37:872-81.

PREPARERS OF THE REPORT

Lisa R. Williams, M.S.
Toxicologist
Health Risk Assessment and Toxicology Program

John F. Villanacci, Ph.D.
Director
Health Risk Assessment and Toxicology Program

ATSDR REGIONAL REPRESENTATIVE

George Pettigrew, P.E.
Senior Regional Representative
ATSDR - Region 6

ATSDR TECHNICAL PROJECT OFFICER

William Greim
Environmental Health Scientist
Division of Health Assessment and Consultation
Superfund Site Assessment Branch


CERTIFICATION

The Welsh Reservoir Health Consultation 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 Health Consultation was initiated.

William Greim
Technical Project Officer, SPS, SSAB, DHAC

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

Richard Gillig
Chief, SPS, SSAB, DHAC, ATSDR



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