Which of the following describes the first action taken in the event of a chemical spill?

The first action taken in the event of a chemical spill involves notifying emergency services, which is crucial for ensuring that trained professionals can respond appropriately. By alerting emergency services, an immediate assessment of the situation can be conducted, allowing for a safer, organized response. This step ensures that any necessary resources, such as hazardous material teams or medical assistance, are deployed quickly.

Identifying the chemical spilled is important, but it typically follows the notification of emergency services because responders need to be aware of the nature of the spill before they can effectively manage it. Evacuating the area and sealing off the contaminated area are also critical responses that need to happen; however, they are generally executed after the emergency services have been notified and guidance has been received on how to proceed based on the specific details of the spill.