The sniff test to detect odorization should be conducted under which condition?

The sniff test to detect odorization is primarily conducted when LP-gas is delivered to the bulk plant. This testing ensures that the propane has been properly odorized before it is distributed. Odorization is a crucial safety measure, as propane is naturally odorless; the addition of an odorant helps individuals detect leaks. Performing the sniff test at the time of delivery allows for prompt verification of odorant levels, ensuring safety right from the start of the storage and distribution process. Implementing this check at delivery helps prevent potential hazards that could arise if the gas were to leak unnoticed.

Other conditions, such as when gas appliances are being installed, gas is being stored in tanks, or during routine maintenance, may involve different safety checks to ensure the overall integrity and safety of the system, but they do not specifically address the immediate need to verify odorization before the gas enters the distribution system. Thus, conducting the sniff test specifically during the delivery phase is consistent with best practices for safety in the handling of propane gas.