The dynamic processes of accident release of hazardous materials in tank area were analyzed and described by different types of models. The Maximum Allowable Concentration (MAC), the Threshold Limit Value (TLV), the Minimum Lethality Concentration (LC_(L0)), as well as the Ambient Multimedia Environment Goals (AME_(GAE)), which was established by industry environment laboratory of Environmental Protection Agency (EPA), were inducted into environment risk analysis. The standards for environment harm degree aiming at protection of human beings and ecosystem were developed. Numerical real-time simulation was carried out to describe the release rate, pool radius and evaporation rate for benzene. Assuming the continuous release of benzene could be described as a series of instantaneous release and using improved box model, time dependent spatial concentration distribution of gaseous benzene above the ground was simulated. Using the standards of environment harm degree developed in this paper, the real-time dynamic environment harmness caused by benzene release was analyzed.
Acta Scientiae Circumstantiae