Study on the inhalation standard of accidental environmental risk assessment in the chemical industry
化工企业突发大气环境风险评价标准的探讨

In order to assess the environmental risk for accidental emissions from the chemical industry effectively, it is necessary to establish a reasonable criteria system for risk assessment. Currently IDLH and LC50 thresholds criteria are used for assessing chemical accident in China. Compared with the criteria abroad, such as AEGLs, ERPGs, TEELs and AETLs, the existing criteria of IDLH and LC50 thresholds are not very rational. It is suggested that the standard can be prioritized as follows, 1)AEGLs; 2)ERPGs; 3)TEELs; and 4)LC50 and IDLH. A case study is carried out to compare the effects of these criteria. The result shows that AEGLs, ERPGs and TEELs are more reasonable than that of the existing criteria used in China to evaluate the impact of accidental events.