Table 4-5 lists a number of realistic and worst-case releases. The realistic releases represent the
incident outcomes with a high probability of occurring. Thus, rather than assuming that an en-
tire storage vessel fails catastrophically, it is more realistic to assume that a high probability ex-
ists that the release will occur from the disconnection of the largest pipe connected to the tank.
The worst-case releases are those that assume almost catastrophic failure of the process,
resulting in near instantaneous release of the entire process inventory or release over a short
period of time.