This evolution consists of three appliances. These are a leaking flange exposing a storage tank, a navy style "tree", and a gas grill cylinder suitable for extinguisher use. All of the propane appliances are designed to present the student with a leaking flammable gas conveyance system. The student will, using fog lines, cool the area and push the fire away from the shut-off valve; thereby allowing another student to enter the area and close the appliance valve and disconnect the flow of propane.