Which action is authorized by the VO regarding sampling equipment?

• A. Carrying out a routine maintenance on a fan
• B. Relocating equipment used for sampling
• C. Replacing a VCD with a new model
• D. Altering mine ventilation schedule without approval

Answer: (B)

Sampling data must reflect current ventilation conditions, so a VO may relocate sampling equipment to maintain data accuracy. Moving where sensors and samplers are placed ensures readings stay representative as airflow paths and mine conditions change, which is essential for assessing gas levels and overall safety. The other options involve activities outside the sampling program—routine maintenance on a fan is a maintenance task, replacing a VCD is an equipment change, and altering the ventilation schedule without proper approval affects operations and requires authorization. Relocating sampling equipment stays within the VO’s role to keep the sampling data valid and meaningful.