When working with a compact excavator near underground utilities (e.g., gas lines, power cables) that have been clearly marked, what is the safest practice?

Question: When working with a compact excavator near underground utilities (e.g., gas lines, power cables) that have been clearly marked, what is the safest practice?

Answer options:

• Excavating as usual, but more slowly, relying on the markings to guide the bucket.
• Using powered excavation equipment until the utility is visually exposed, then hand digging. ✅ Hand digging within the tolerance zone (e.g., 1 metre or 3 feet) of any marked utility.
• Assuming the markings indicate the exact depth and route of the utility, and digging around them.

Correct answer: Hand digging within the tolerance zone (e.g., 1 metre or 3 feet) of any marked utility.

Explanation: According to provincial OHS regulations and best practices, within the tolerance zone of marked underground utilities, only hand digging, vacuum excavation, or other non-destructive means are permitted to prevent damage.