Where can procedures for cleaning contaminated fuel oil storage and service tanks be found?

The procedures for cleaning contaminated fuel oil storage and service tanks are found in NSTM 541, which focuses on petroleum and oil testing. This section provides detailed guidance on the methods and techniques necessary for proper maintenance, testing, and dealing with contaminants in fuel oils. Cleaning protocols are critical to ensuring the integrity and safety of fuel systems aboard vessels, as contamination can lead to operational issues and safety hazards.

While the other choices mention aspects related to fuel and oil management, they do not specifically address the procedures for cleaning storage and service tanks. Understanding the specific focus of NSTM 541 is crucial for Machinist's Mates, as it directly relates to maintaining fuel quality and operational efficiency.