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By Willard R. Chappel, Charles O. Abernathy and Rebecca L. Calderon (Eds.)

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Extra resources for Arsenic Exposure and Health Effects III. Proceedings of the Third International Conference on Arsenic Exposure and Health Effects, July 12–15, 1998, San Diego, California

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1995. Arsenic in groundwater in six districts of West Bengal, India: the biggest arsenic calamity in the world. Part 2. Arsenic concentration in drinking water, hair, nails, skin-scale and liver tissue (biopsy) of the affected people. Analyst, 120,917-924. , Montero. , Kelsh, M. E. 1997. Altered profile of urinary arsenic metabolites in adults with chronic arsenicism. A pilot study. Arch. Toxicol. 71,211-217. De Peyster, A. A. 1995. Arsenic levels in hair of workers in a semiconductor fabrication facility.

As shown in Figure 2, particle size distributions measured by all five individuals' personal samplers were heavily skewed toward the larger particles. As noted earlier, the personal exposure for Subjects 1 through 3 was much higher than for Subjects 4 and 5, who only worked during the later stages of the cleaning process. 5 for Subject 3, indicating that the masks provided very little protection from the aerosol exposure. In addition, estimates obtained from the workers regarding the percent of time each day that they wore the masks indicated that the masks were used only about half of the time (generally during the highest exposures).

This value of total excreted As was then divided by the estimated total amount of As deposited in the respiratory tract to obtain an estimate of the systemic bioavailability (percent systemic uptake) of the deposited arsenic. Airborne Exposure to Arsenic Occurring in Coal Fly Ash 23 RESULTS AND DISCUSSION Particle Deposition Analysis of the mass of aerosol from the different stages of the cascade impactors revealed a highly polydisperse aerosol. Figure 1 shows the average cumulative distribution of arsenic as a function of particle size for three workers on the two days associated with the highest exposures.

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