A heavy equipment operator is working on a residential project site, excavating a basement for a new house. The site supervisor has just informed them that buried electrical lines from an adjacent property are located closer to the excavation area than initially marked on the ground penetration radar (GPR) report. What is the operator's immediate priority action?

Question: A heavy equipment operator is working on a residential project site, excavating a basement for a new house. The site supervisor has just informed them that buried electrical lines from an adjacent property are located closer to the excavation area than initially marked on the ground penetration radar (GPR) report. What is the operator's immediate priority action?

Answer options:

• Continue excavating carefully, observing for any signs of cables. ✅ Immediately cease all excavation in the vicinity of the unmarked lines.
• Switch to a smaller bucket to reduce the risk of striking the lines.
• Pound new stakes to re-mark the perceived location of the lines.

Correct answer: Immediately cease all excavation in the vicinity of the unmarked lines.

Explanation: According to Canadian safety regulations, if there's any doubt about the location of buried utilities, operators must immediately stop work and re-verify their precise location to prevent striking and injury.