Which of the following refers to the thorough hand and power tool cleaning level considered in the inspection process?

The thorough hand and power tool cleaning level considered in the inspection process is defined by SSPC-SP3. This standard outlines the requirements for removing deteriorated coatings, rust, and other contaminants from steel surfaces using power tools. SSPC-SP3 requires that the surface be cleaned to a standard that ensures effective adhesion of the new coating. It emphasizes achieving a clean appearance free from visible contaminants, ensuring the surface is properly prepared for subsequent coatings.

In the context of surface preparation standards, SSPC-SP1 pertains to solvent cleaning, which is not as thorough concerning physical surface preparation as SSPC-SP3. ISO St 2 and ISO St 3 also describe levels of surface cleanliness in terms of surface rust and contaminants but differ in the method and extent of cleanliness. So, while all standards have their specific contexts and applications, SSPC-SP3 uniquely focuses on the detailed cleaning required through power tools, making it particularly relevant for thorough inspection processes.