What is required during the filling procedure of a spray tank?

• A. A supervisor must watch from a distance.
• B. The filling must occur outdoors only.
• C. A person over the age of 18 must be present.
• D. A person over the age of 16 must be present and capable of stopping the release of spray solution.

Answer: (D)

Safety during the filling of a spray tank hinges on having someone nearby who can immediately stop the flow if something goes wrong. This ensures quick action to prevent overfilling, spills, leaks, or accidental exposure, which protects the handler, bystanders, and the environment.

The requirement is that a person at least 16 years old must be present and capable of stopping the release of the spray solution. The emphasis is on capability to act quickly and effectively—being able to shut off flow, close valves, or halt the pump if needed. This isn’t about who supervises from a distance or about filling outdoors only; it’s about having a trained, responsible individual on hand who can intervene right away.

In practice, that means the person present knows how to stop the system, where the shut-off valves are, and can respond to spills or equipment issues while proper PPE and procedures are followed.