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An operator has a valid Dig Safe ticket and a yellow line has been painted on the ground, indicating a natural gas pipeline. What is the mandatory procedure for digging within the 'tolerance zone' of this marking?

The operator may use a small backhoe bucket if a spotter is present. Excavation must be performed using non-mechanical means, such as hand digging. Mechanical digging is permitted as long as it does not go deeper than the frost line. The gas company must be on-site to supervise any mechanical excavation.

Correct Answer:

Excavation must be performed using non-mechanical means, such as hand digging.

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