Which of the following duties is NOT typically performed by a distribution operator?

The responsibility of a distribution operator primarily revolves around the maintenance and management of water distribution systems. This includes tasks such as repairing leaks, flushing mains, and taking bacteriological samples to ensure water quality meets safety standards.

Repairing leaks is essential for preventing water loss and maintaining pressure within the distribution system. Flushing mains is performed to improve water quality by removing sediment and other accumulated materials. Taking bacteriological samples is critical for monitoring the presence of harmful microorganisms and ensuring that the drinking water is safe for consumption.

Operating heavy machinery, while it may be necessary in some contexts, is not typically a core duty of a distribution operator. This task is more aligned with roles that require specific training and certification related to machinery operation, which is often outside the primary scope of a distribution operator's responsibilities. Thus, this distinguishes it from the other duties, emphasizing that it is not part of the regular functions expected of a distribution operator.