Our plant site is considering installing a propane storage tank at a location 100 m from a control room. We have been asked to evaluate the risk at this location due to flammability and explosion hazards.

a. What continuous release of propane (in kg/s) is required to result in a concentration at the control room equal to the LFL? Make sure you clearly state and validate your assumption of atmospheric stability. Assume rural conditions, a temperature of 25°C, and a pressure of 1 atm.
b. The control room is designed to withstand a side-on peak overpressure of 2 psig. How much propane (in kg) can be stored at this location? Be sure to clearly state and justify your assumption of an explosion efficiency.