When conducting equipment maintenance, what is the first step to avoid contamination spread?

• A. Isolate and tag out the equipment, then decontaminate the work area before maintenance.
• B. Disassemble the equipment for maintenance.
• C. Proceed with maintenance and decontaminate afterward.
• D. Turn off power, and begin maintenance immediately.

Answer: (A)

Contamination control during maintenance starts with securing the equipment and the area before any work begins. Isolating and tagging out the equipment ensures it cannot be started or put into motion, blocking any accidental release of contaminants while you work. After securing the equipment, decontaminating the work area removes residual contaminants and prevents their spread to clean zones, other equipment, or personnel. This sequence creates a controlled boundary that protects workers and the environment as maintenance proceeds.

Disassembling without first isolating and decontaminating can release contaminants or create pathways for spread. Waiting to decontaminate until after maintenance allows contaminants to be distributed through the work area. Merely turning off power, while important, does not prevent chemical contamination spread or accidental restart and doesn’t address containing contaminants in the environment.