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A Physiologically Based Pharmacokinetic Assessment of Tetrachloroethylene in Groundwater for a Bathing and Showering Determination

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  • Hari V. Rao
  • David R. Brown

Abstract

A two‐step methodology is described to make a health‐based determination for the bathing and showering use of the water from a private well contaminated with volatile organic chemicals. The chemical perchloroethylene (PERC) is utilized to illustrate the approach. First, a chemical‐specific exposure model is used to predict the concentration of PERC in the shower air, shower water, and in the air above the bathtub. Second, a physiologically based pharmacokinetic (PBPK) model is used to predict the concentration of PERC delivered to the target tissue, the brain, since the focus is on neurological endpoints. The simulation exercise includes concurrent dermal and inhalation routes of exposure. A reference target tissue level (RTTL) in the brain is estimated using the PBPK model. A hazard index based on this benchmark guideline is used to make a regulatory determination for bathing and showering use of the contaminated water.

Suggested Citation

  • Hari V. Rao & David R. Brown, 1993. "A Physiologically Based Pharmacokinetic Assessment of Tetrachloroethylene in Groundwater for a Bathing and Showering Determination," Risk Analysis, John Wiley & Sons, vol. 13(1), pages 37-49, February.
    • Handle: RePEc:wly:riskan:v:13:y:1993:i:1:p:37-49
    DOI: 10.1111/j.1539-6924.1993.tb00727.x
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    1. Hari V. Rao & Gary L. Ginsberg, 1997. "A Physiologically‐Based Pharmacokinetic Model Assessment of Methyl t‐Butyl Ether in Groundwater for a Bathing and Showering Determination," Risk Analysis, John Wiley & Sons, vol. 17(5), pages 583-598, October.

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