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Excavator Operator Certification Exam Prep · Question

During excavation, an unmarked 100 mm diameter plastic pipe is encountered at a depth of 1.2 metres. The operator immediately stops work. What is the most appropriate next action?

Any unmarked utility encountered must be treated as live and potentially hazardous until positively identified by a competent person. The supervisor must be inf

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Question: During excavation, an unmarked 100 mm diameter plastic pipe is encountered at a depth of 1.2 metres. The operator immediately stops work. What is the most appropriate next action?

Answer options:

  • Carefully hand dig around the pipe to determine its direction and depth.
  • Assume it's an old drain tile and continue excavating cautiously at a slightly different location. ✅ Notify the supervisor immediately and treat it as a live utility until confirmed otherwise.
  • Use a metal detector to identify if it contains any electrical cables.

Correct answer: Notify the supervisor immediately and treat it as a live utility until confirmed otherwise.

Explanation: Any unmarked utility encountered must be treated as live and potentially hazardous until positively identified by a competent person. The supervisor must be informed immediately as per OHS regulations to prevent potential serious injury, property damage, or service disruption.

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