Which is the correct sequence of steps in cleaning for visual inspections?

The correct sequence of steps in cleaning for visual inspections involves an effective approach to minimizing lead dust and residues, which is crucial for ensuring a safe inspection environment. Starting with the HEPA vacuum removes the majority of loose lead particles and dust from surfaces. This step is vital because lead dust can pose significant health risks, particularly in homes with young children or pregnant individuals.

Next, washing with TSP (trisodium phosphate) helps to thoroughly cleanse surfaces and further dislodge any remaining contaminants. TSP is particularly effective in breaking down any oily substances or residues that other cleaning methods may not effectively remove.

Finally, a second HEPA vacuum after washing ensures that any dust or debris stirred up during the washing process is removed. This two-step vacuuming process helps to ensure that the area is left as clean as possible, providing a reliable environment for visual inspections.

This sequence emphasizes the importance of first removing as much loose contamination as possible before applying any cleaning solution, followed by ensuring a clean surface free of residues.