Do you A) seal the door frame and open the windows; B) leave the building; or C) go over to the laptop, load up a search page and check to see how much time you have? Try “C”:

“how many minutes for chemical fumes to seep into apt doors if spilled in hallway” (1/13/08)

Probably less time than it takes for google to return search results from “how many minutes for chemical fumes to seep into apt doors if spilled in hallway” . . .