In the event of a gas line contact during an underground operation, what should not be attempted?

When a gas line is contacted during underground operations, repairing the line or attempting to turn it off poses significant risks and is highly discouraged. The proper protocol involves prioritizing safety and involving the appropriate professionals.

Attempting to repair a gas line without the proper training, tools, and authority can lead to further damage, gas leaks, explosions, or personal injury. Similarly, turning off the line typically requires specific procedures that trained utility personnel are equipped to handle, ensuring that these actions are done safely and correctly.

Therefore, both repairing and turning off the line should not be attempted by individuals who are not specifically trained and authorized, which confirms that choosing the option reflecting the need to avoid these actions adheres to safety regulations and best practices in emergency handling involving gas lines.