Determinants of Respirable Silica Exposure in Stone Countertop Fabrication: A Preliminary Study
Determinants of Respirable Silica Exposure in Stone Countertop Fabrication: A Preliminary Study
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DOI：
10.1080/15459624.2013.789706
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发表时间：
2013-07-01
影响因子：
2
通讯作者：
Johnson, Andrew C.
中科院分区：
文献类型：
--
作者：
Phillips, Margaret L.;Johnson, David L.;Johnson, Andrew C.
研究人员在四个车间进行了个人接触可吸入石英的初步研究，这些车间使用各种干湿方法用花岗岩和含石英的合成石质材料制造台面。在轮班的任何部分（n = 15人日），所有使用干制方法的工人的全班时间加权平均（TWA）暴露超过了ACGIH阈值0.025mg/m(3)，即使是非常有限的时间。广泛使用干燥法的工人的几何平均暴露量约为1mg/m(3) （n = 12人日）。仅操作自动化或远程控制的石材切割或成型设备的工人计算出的TWA暴露量约为0.02mg/m(3) （n = 3人日）。使用线性代数程序，根据从多任务部分移位样本结果中提取的估计浓度，对各种干湿手动操作的特定任务几何平均暴露进行了排序。在以前仅报道使用湿法的商店中，观察到有限的干法使用。这些结果表明，即使是报告仅使用湿法的商店，实际上也可能在特定操作中短暂使用干法。因此，可能有理由担心所有石材台面车间可能过度暴露于可呼吸性石英。
A preliminary study of personal exposure to respirable quartz was conducted in four shops that used a variety of wet and dry methods to fabricate countertops from granite and quartz-containing synthetic stone-like materials. Full-shift time-weighted average (TWA) exposures exceeded the ACGIH threshold limit value of 0.025mg/m(3) for all workers who used dry fabrication methods, even for very limited time, during any part of the work shift (n = 15 person-days). The geometric mean of exposures for workers who used dry methods extensively was about 1mg/m(3) (n = 12 person-days). Workers who operated only automated or remotely controlled stone cutting or shaping equipment had calculated TWA exposures of approximately 0.02mg/m(3) (n = 3 person-days). Task-specific geometric mean exposures for various wet and dry manual operations were ranked based on estimated concentrations extracted from multi-task partial-shift sample results using a linear algebra procedure. Limited use of dry methods was observed in shops that had previously reported using only wet methods. These results suggest that even shops that report using only wet methods might, in fact, resort to brief use of dry methods for specific operations. Therefore, there may be reason for concern over potential overexposure to respirable quartz in all stone countertop shops.