Tsolova S, Zaprianov Z, Dimitrov Ts, Georgieva R, Khinkova L, Petrov I, Nikolova L
Probl Khig. 1995;20:128-38.
The arsenic exposure in the main departments and occupational groups of the copper smelter in Pirdop has been estimated in the present study. The contents of arsenic is measured in the air and in biological samples--urine and nails. At most of the workplaces the time-weighted average (TWA) concentrations do not exceed the threshold limit value (0.05 mg/m3). The maximum TWA level is about three times higher. The intake of arsenic is significantly increased in almost all observed occupational groups. However, the excretion of only 8% of the workers is higher than the maximum background level (100 micrograms/l). The estimated degree of exposure corresponds to a low health risk. Some of the most heavily exposed occupational groups may be expected to reach higher levels of intake and health risk.
本研究对皮尔道普铜冶炼厂主要部门和职业群体的砷暴露情况进行了估算。对空气以及生物样本（尿液和指甲）中的砷含量进行了测量。在大多数工作场所，时间加权平均（TWA）浓度未超过阈限值（0.05毫克/立方米）。最高TWA水平约为阈限值的三倍。几乎所有观察到的职业群体的砷摄入量都显著增加。然而，只有8%的工人的排泄量高于最大背景水平（100微克/升）。估计的暴露程度对应较低的健康风险。预计一些暴露最严重的职业群体的摄入量和健康风险会达到更高水平。
