A security guard discovers a suspicious package exhibiting a strange odor and a visible leak. What is the immediate priority for the guard?

1. Evacuate the immediate area and isolate the package, then notify authorities.
2. Attempt to identify the contents of the package to determine its threat level.
3. Move the package to a secure location where it can be examined more closely.
4. Cover the package with a tarp to contain any potential spread of its contents.