Since 2012, the IFC has required special signage at each Flammable Liquid Truck/Railcar unloading station. This signage is intended to reduce “tank overflow” events (e.g., Loss of Primary Containment (LOPC) events). Here are the requirements:
5704.2.9.7.5.1 Information signs. A permanent sign shall be provided at the fill point for the tank, documenting the filling procedure and the tank calibration chart.
Exception: Where climatic conditions are such that the sign may be obscured by ice or snow, or weathered beyond readability or otherwise impaired, said procedures and chart shall be located in the office window, lock box or other area accessible to the person filling the tank.
A permanent sign displaying filling instructions and a tank calibration chart must be located at the fill point. If weather conditions make an outdoor permanent sign impractical, the exception allows storing the instructions and calibration charts at another location accessible to the individual filling the tank.