Chesson J, Hatfield J, Schultz B, Dutrow E, Blake J
Chesson Consulting, Washington, D.C. 20036.
Environ Res. 1990 Feb;51(1):100-7. doi: 10.1016/s0013-9351(05)80186-0.
The U.S. Environmental Protection Agency sampled air in 49 government-owned buildings (six buildings with no asbestos-containing material, six buildings with asbestos-containing material in generally good condition, and 37 buildings with damaged asbestos-containing material). This is the most comprehensive study to date of airborne asbestos levels in U.S. public buildings during normal building activities. The air outside each building was also sampled. Air samples were analyzed by transmission electron microscopy using a direct transfer preparation technique. The results show an increasing trend in average airborne asbestos levels; outdoor levels are lowest and levels in buildings with damaged asbestos-containing material are highest. However, the measured levels and the differences between indoors and outdoors and between building categories are small in absolute magnitude. Comparable studies from Canada and the UK, although differing in their estimated concentrations, also conclude that while airborne asbestos levels may be elevated in buildings that contain asbestos, levels are generally low. This conclusion does not eliminate the possibility of higher airborne asbestos levels during maintenance or renovation that disturbs the asbestos-containing material.
美国环境保护局在49座政府所有建筑中采集了空气样本（6座不含含石棉材料的建筑、6座含石棉材料且状况总体良好的建筑以及37座含石棉材料已受损的建筑）。这是迄今为止对美国公共建筑正常建设活动期间空气中石棉水平进行的最全面研究。每座建筑外的空气也进行了采样。空气样本采用直接转移制备技术通过透射电子显微镜进行分析。结果显示空气中石棉平均水平呈上升趋势；室外水平最低，含石棉材料已受损的建筑中水平最高。然而，从绝对值来看，测量到的水平以及室内与室外之间、不同建筑类别之间的差异都很小。加拿大和英国的类似研究虽然估计浓度有所不同，但也得出结论，虽然含石棉建筑中的空气中石棉水平可能会升高，但总体水平较低。这一结论并未排除在维护或翻新过程中扰动含石棉材料时空气中石棉水平更高的可能性。
