$($f$)$ the adjacent chlorine tank has a recirculation pump at the top of the tank $(150$ft high$),$ this pump experiences a catastrophic failure and releases $100lbs$ of chlorine as a liquid in less than $2$ minutes. Assume that all this liquid chlorine flashes into vapor and migrates from the plant under worst case scenarios and has a gas density of approximately that of air due to mixing$).$ Show the down wind isopleths that will impact the plant workers and people living near the plant that results in casualties. Explain your assumptions and what endpoint values you used to draw the isopleths.