What is the first action taken upon discovering gasoline when you open a manhole?

When gasoline is discovered upon opening a manhole, the immediate response is to prioritize safety and prevent any potential hazards. Calling the police and fire departments is the correct response because they are equipped to handle hazardous materials and can safely assess the situation. Emergency responders have the training and resources necessary to manage flammable substances and can take appropriate actions to ensure public safety, including evacuating the area if needed.

This choice reflects the importance of a swift response to a potentially dangerous situation, as gasoline can pose serious risks related to fire or explosion, especially in confined spaces. Emergency services can also coordinate with local waste authorities once the immediate dangers have been addressed, ensuring that further actions related to containment and cleanup are handled properly. This priority on immediate safety is crucial in any incident involving hazardous materials.