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Research Updates - Community Exposures and Methods of Detection (AIHce EXP 2020 OnDemand)

Course Description:
Recorded at Virtual AIHce EXP 2020

Lead in Drinking Water at North Carolina Child Care Centers - Piloting a Citizen Science-Based Testing Strategy
The public health crisis in Flint, MI underscores the importance of lead in drinking water as a lingering hazard in the effort to eliminate exposure to lead (Pb). Childhood exposure to this potent neurotoxin is especially damaging to developing central nervous system tissues. Cognitive and behavioral development can be adversely impacted for a lifetime. This is the first study to characterize Pb in municipal drinking water at North Carolina, USA, childcare centers. This study demonstrates a scalable, cost-effective citizen science-based water testing strategy for Pb in drinking water that may be attractive to resource-constrained state and municipal governments. Presenter: Keith Levine, Ph.D., RTI International Research Triangle Park, NC United States of America

Consideration of Wind Speed Effect on Passive Sampler

The purpose of this report is to give IHs guidelines for using passive samplers with high accuracy. A passive sampler for personal exposure measurement and fixed point measurement at a specific location is a simple and useful technique. However, the quality control differs between active sampler methods, and mostly relies on the sampler manufacturers. The manufacturers' passive sampler performance requirements can be found in ISO16107 (2007), OSHA, and NIOSH. Among them, the effect of wind speed is considered to be one of the factors that have a significant effect on passive samplers. In this report, we investigated a method to determine the accuracy of a passive sampler using the effect of wind speed on the diffusion film. Presenter: Yoshihiro Suzuki, SIBATA Scientific Technology Ltd. Soka city, Saitama Pref. Japan

Comparison of Different Methodologies for Evaluating Trichloramine Exposures in Indoor Swimming Pools

Hery's sampling procedure has been widely used for the determination of trichloramine (TCA) in indoor swimming pools. This study aims to evaluate the effects of cassette assemblies and sampling flow rates on exposure assessment of TCA. Laboratory tests were performed using a TCA production setup specifically designed for this study. Workplace measurements were carried out in three indoor swimming pools in Montreal. Beside total TCA concentration, the percentage of TCA captured on the second filter was measured as an indicator of method efficiency. The results showed that using a separable prefilter significantly reduced the contamination from other chlorides. At flow rates higher than 0.75 l/min, a significantly higher percentage of TCA moved onto the second filter, indicating a potential loss of TCA during sampling. These findings can be used to increase the accuracy of TCA exposure assessment in indoor swimming pools. Presenter: Mrs. Elham Ahmadpour, Department of Environmental and Occupational Health School of Public Health, University of Montreal Montreal, Quebec, Canada

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