Final answer:
The minimum distance that ignition sources must be from an LP-Gas transfer operation in progress is approximately 18 meters (60 feet).
Step-by-step explanation:
The minimum distance that ignition sources must be from an LP-Gas transfer operation in progress is highly dependent on safety regulations and guidelines. These regulations are in place to prevent accidents and ensure the safe transfer of LP-Gas. In general, ignition sources should be kept at least 18 meters (60 feet) away from the transfer operation.
Some examples of ignition sources that should be kept away include open flames, sparks, electrical equipment that may generate sparks, and smoking materials. These precautions are necessary because LP-Gas is flammable and can ignite easily if exposed to a source of ignition.
It's important to note that the specific distance may vary depending on local regulations and the size of the LP-Gas transfer operation. Therefore, it is crucial to consult applicable safety guidelines and authority recommendations to determine the precise minimum distance for a given situation.