What is the recommended method for exposing a pipeline within the Critical AOC?

What is the recommended method for exposing a pipeline within the Critical AOC?

• A. Use mechanical digging without supervision.
• B. Use non-destructive methods (vacuum excavation) or careful hand-digging with exposure area, under direct supervision and operator presence.
• C. Expose entire length by blasting.
• D. Use explosive blasting to expedite exposure.

Answer: (B)