What is the maximum tank capacity for manual tank gauging?

The maximum tank capacity for manual tank gauging is 550 gallons. This is established by regulatory guidelines, which specify that manual tank gauging is an acceptable method for inventory control in underground storage tanks that have a capacity of 550 gallons or less. This limitation is in place to ensure that the gauging method remains practical and reliable, as larger tanks are typically more complex and require more rigorous monitoring methods to prevent issues such as leaks or overfills.

For tanks that exceed this capacity, alternative monitoring methods, such as automatic tank gauging or other technologies, need to be utilized to ensure compliance with safety and environmental regulations. Manual gauging becomes less effective as the size of the tank increases, owing to the increased potential for inaccuracies and errors in measurement, along with heightened risk during operations. Therefore, adherence to the specified capacity limits for manual gauging is crucial for maintaining the integrity of the fuel storage system and ensuring regulatory compliance.