Which of the following is an immediate response to a petroleum spill?

Assessing the affected area is the appropriate immediate response to a petroleum spill because it allows responders to understand the extent of the spill and the potential impact on the environment, facilities, and personnel. This assessment is critical for determining the necessary actions to contain the spill and mitigate any harmful effects.

By evaluating the affected area, responders can identify the source of the spill, the type of petroleum involved, and the surrounding environment that may be impacted. This initial evaluation informs the best strategies for cleanup and response, ensuring that efforts are effective and protective of both human health and the environment.

Responses such as ignoring the spill would exacerbate the situation and potentially lead to severe environmental damage and safety hazards. Completing a cost analysis is not an immediate concern during a spill response; the priority should be on containment and mitigation rather than financial considerations. Documenting supplier performance is also not relevant in the immediate aftermath of a spill, as the focus should be on addressing the emergency at hand rather than evaluating past supplier performance.