This article is intended to walk us through the DOT requirements for UNLOADING LPG and NH3 tanker trucks. In the DOT requirements covered in this article, we will see items that mirror OSHA’s PSM and EPA’s RMP requirements for DOCUMENTING Safety Systems and their intended functions. The material covered here should be incorporated into all UNLOADING SOPs and even in the risks evalauation for a facility to specify what they want in reagrds to the delivery truck(s) emergency discharge control equipment. Remember, one of the HIGHEST risk we face is when we are transferring thousands of gallons of our hazardous material(s) through temporary connections and a hose, so our level of SAFETY should rise to the level of risks. DOT has done a nice job structuring the requirements for Liquefied Compressed Gas (LCG) service and we should take heed as process safety and safety professionals.