Estimating Children's Exposure to Arsenic from CCA-Treated Wood
Author Information
Author(s): Leila M. Barraj, Joyce S. Tsuji, Carolyn G. Scrafford
Primary Institution: Exponent, Inc.
Hypothesis
Can child hand-loading data improve the SHEDS-Wood model's estimates of arsenic exposure?
Conclusion
Using child hand-loading data leads to more accurate estimates of children's exposure to arsenic from CCA-treated wood.
Supporting Evidence
- Children's hand-loading data showed lower arsenic levels than previously estimated by the U.S. EPA.
- The study found that the maximum hand loadings achieved a steady state after a short period of play.
- Mean LADD estimates were 27% of those derived by the U.S. EPA using previous methods.
- Observational data from children provide a more accurate representation of exposure than experimental data from adults.
Takeaway
This study shows that kids playing on certain wooden playgrounds might be exposed to less arsenic than previously thought.
Methodology
The study used observational data from children playing on CCA-treated playgrounds to assess arsenic exposure.
Potential Biases
Potential bias due to reliance on parental consent and the assumption that children played on playsets.
Limitations
The study had a relatively small sample size and did not include surface wipe analyses of the structures.
Participant Demographics
Children aged 1-6 years, with 66 participants from playgrounds with CCA-treated and non-CCA-treated playsets.
Digital Object Identifier (DOI)
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