A typical residence aboveground propane tank of 500 gallons (1,893 liters) would need a minimum water-cooling rate of:

For a typical residence propane tank of 500 gallons, a water-cooling rate of 100-150 GPM (gallons per minute) is established as necessary to effectively manage and mitigate the risks associated with tank exposure to heat. The purpose of cooling is to prevent the tank from reaching a temperature that could lead to a failure or catastrophic event due to overpressure from the expanding gas within the tank if it were to become overheated.

The specified range of 100-150 GPM ensures a sufficient flow of water to cool the tank's surface continuously, thereby maintaining a safe temperature during emergency situations. This rate is aligned with industry standards and best practices to protect both the tank and surrounding structures from ignition and explosion risks. Keeping the water flow within this range allows for effective heat absorption and evaporation, which is critical in protecting the integrity of the propane tank, ensuring that it remains stable during firefighting operations or incidents.

Higher water flow rates, such as those proposed in other options, might be unnecessary and could lead to resource wastage or complications in managing operations. Conversely, rates lower than 100 GPM could be inadequate, failing to provide the necessary cooling effect to safeguard the tank against thermal failure. Thus, 100-150 GPM