I will never forget something that happened to me several years ago when I was in Mayport attending 2M school. (I got out of the Navy last year, going back to school now, hoping to go to law school when I graduate.)
I was staying in the barracks on TAD orders, after getting home late one night I encountered the SN who was living across the hall from me. He was absolutely reeking of JP-5, you could smell it on him from a hundred feet away.
He told me that there had a been a major fuel leak on the carrier and he had been assigned to clean it up.
What struck me about the situation was that they let him off the quarterdeck on the Kennedy while covered in JP-5 from head to toe. Kid was lucky someone didn't light up a smoke next to him, he'd probably have gone up like a roman candle.
I thought to myself, "What kind of jacked up command the Kennedy must be to allow a deck seaman off the boat soaking in jet fuel. Don't they have working showers?"
If I had been higher ranking (I was a third class then) I would have done everything I could to make sure that whoever let him off the boat like that ended up on report. As it was, I just told him that if he was smart, he'd go straight to his room and get in the shower.
Several weeks later the Kennedy went out to sea and failed their sea trials (as I understood, their boilers all quit working at the same time) and their CO, XO and Chief Engineer all lost their jobs. (And no doubt their careers ended pretty abruptly after that.)
JP-5 is not flammmable at atmoshpheric conditions. Flash point is 140 degrees Farenheit. That's why they carry it on ships. I know. We had an issue with this recently and to make sure that I knew what the hell I was talking about I threw a cigarette into an ashtray filled with JP-5 and it went out. Tried to light it with a lighter and it wouldn't light. Left the cigarette in the ashtray and it lit the cigarette like a wick in a candle. No big deal. JP-8 (Air Force uses) has a flashpoint of 100 degrees and would be concern. JP-4 (commercial avgas if I'm not mistaken) has a flashpoint of -40 degrees and will light up like a roman candle. Twin towers.
Don't know the Navy regs on avgas cleanup.