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最近美国一些单位和人士主张降低车间石棉卫生标准,但政府石棉顾问委员会(ACA)表示反对。工会代表大会(TUC)在给ACA的意见书中指出现行卫生标准是“完全不适宜的”,2个纤维/cm~3空气达一最高容许浓度“仍有1%的危险发生石棉肺”,而“完全不能预防癌症”,建议暂行最高容许浓度改为0.2个纤维/cm~3。职业安全和缝康研究所(NIOSH)认为这一标准不能制止胸部X片发生异常”,主张将现行卫生标准降低20倍,并认为对致癌物不能规定安全接触浓度”。TUC和NIOSH都主张将来禁用石棉,寻找安全的代用品。但是ACA在1977年1月发表声明,认为有关石棉所致疾病发病率与石棉接触剂量关系的资料不足以说明有必要修改现行卫生标准。这一声明又遭到反对。McGinty指出,目前的卫生标
Recently, some units and individuals in the United States advocated the reduction of asbestos hygiene standards in the workshop, but the government asbestos advisory committee (ACA) opposed it. The TUC said in its submission to the ACA that current health standards are “totally inappropriate” and that asbestos lungs are “still at risk of 1%” for 2 fibers / cm 3 of air reaching a maximum allowable concentration And “can not prevent cancer at all”, it is suggested that the maximum allowable concentration of the temporary tentatively changed to 0.2 fibers / cm ~ 3. The Institute for Occupational Safety and Health (NIOSH) does not consider this standard to prevent abnormalities in the chest radiographs, “arguing that the existing health standards should be reduced 20-fold and that no safe contact concentrations should be prescribed for carcinogens.” Both TUC and NIOSH advocate forbidding asbestos in the future to find safe substitutes. However, the ACA issued a statement in January 1977 that insufficient information on the relationship between the incidence of asbestos-related diseases and exposure to asbestos was not sufficient to demonstrate the need to amend current health standards. This statement was opposed again. McGinty pointed out that the current health standard