Which step is NOT generally taken when gas-freeing a tank?

Correct Answer: Option D — Application of degreasing solvents

Gas-freeing focuses on removing flammable vapors and hazardous residues. While cleaning sludge and ventilating with fresh air are standard, applying degreasing solvents is not a general step. Solvents can introduce new chemical hazards, increase toxicity, or create additional explosive vapors, complicating the safety process during tank entry preparations.