You live in California so I'd bet they've got regulations on use of LPG inside of a warehouse. As a practical matter, I wouldn't worry about running it for short periods so long as you leave the bay doors open.
And if you store it in the building make a habit of shutting off the LP at the tank when not in use.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.