An excavator operator is working near a marked communication line. The utility company specified a 'hand exposure' zone of 600 mm on either side of the mark. What does this mean for the operator?

Question: An excavator operator is working near a marked communication line. The utility company specified a 'hand exposure' zone of 600 mm on either side of the mark. What does this mean for the operator?

Answer options:

• They can use the excavator within this zone, but only with a small bucket attachment. ✅ They must cease mechanical excavation and expose the line using hand tools or hydrovac within this 1.2-metre wide corridor.
• They need to maintain a minimum clearance of 600 mm from the line for all machine parts.
• They are permitted to dig mechanically if the ground is soft and free of rocks.

Correct answer: They must cease mechanical excavation and expose the line using hand tools or hydrovac within this 1.2-metre wide corridor.

Explanation: The 'hand exposure' zone means precisely what it implies: within this specified distance (600 mm in this case), mechanical excavation is forbidden, and the utility must be exposed manually (by hand tools or hydrovac) to prevent damage. This creates a 1.2-metre wide safe zone around the line's potential location.