Final answer:
When unloading a cargo tank with a capacity of 3500 water gallons or less in metered delivery service that takes more than five minutes to complete, the person must observe both the cargo tank and the receiving container every 15 minutes.
Step-by-step explanation:
According to the Federal Motor Carrier Safety Administration (FMCSA), when unloading a cargo tank with a capacity of 3500 water gallons or less in metered delivery service that takes more than five minutes to complete, the person must observe both the cargo tank and the receiving container every 15 minutes. This observation frequency ensures that any spills or leaks can be promptly detected and addressed to prevent any safety hazards or environmental contamination.
For example, if it takes 10 minutes to unload the cargo tank, the person should observe the tank and receiving container at least twice during the unloading process.
The question relates to the frequency of observation required when unloading a cargo tank with a capacity of 3500 water gallons or less during metered delivery service that takes more than five minutes to complete. However, the information provided relates to the broader context of shipping, including container ships, ballast water (BW) management, and inoculation frequencies, which does not directly answer the specific question at hand.
In order to provide an accurate answer, it would be essential to refer to regulatory documents or industry standard practices specific to cargo tank unloading, which may vary depending on the jurisdiction and type of material being unloaded.