Don't underestimate misting fire suppression systems. On a bet I put out a 5 gallon bucket full of water with burning diesel on top using nothing but a ZEP spray bottle. This was flames 5' high.
I had the nozzle cranked all the way down so it was shooting a fine mist. That water just sucks the heat out of the fire until it can't burn anymore.
It is something they taught me in the military to fight fires on ships. We used low velocity fog to control a diesel oil fire in a swimming pool sized tank and in a mock up of a ships compartment.
