c. Inlet valve (SLOWLY). d. Drain valves to the drain tank. 2. When MOGAS appears at the filter vent sight glass, close the vent valve and slowly open the filter discharge. 3. Report that the filter is vented and the discharge open. Fuel vehicles in accordance with CFOSS and your command’s instructions. Always ensure that qualified supervisors are on station. To secure from fueling: 1. Secure the station IAW CFOSS. 2. Secure the transfer pump: a. Stop the pump. b. Secure the tanktop valve. c. Close the inlet and discharge valve. d. Close the suction and discharge pressure cutout valves. e. Close the recirculating line valves. 3. Drain back the piping: a. b. c. valve. draw-off. d. Close the automatic filter drain valve. Close the drain tank valve. Open the following valves: (1) (2) (3) (4) (5) (6) Fueling station/fill station isolation Fill line isolation valve. Tanktop valve. Flow meter bypass valve. Transfer pump blow back valves. Filter drain valve and drain valve to the Ensure the following is opened: (1) (2) (3) (4) (5) (6) (7) Filter inlet and bypass. Transfer pump discharge valves. Venturi discharge valve. Flow meter inlet and discharge valves. Transfer pump recirculating valves. Draw-off tanktop valve. Draw-off recirculating tanktop valve. e. Open the air-operated N2 inert gas supply valve located on the second deck. f. Observe the reflex sight glass gage. When liquid is no longer visible, close the following: (1) (2) (3) (4) Tanktop valve. Draw-off tanktop valve. Draw-off recirculating valve. Air-operated NZ inert gas supply valve. g. Report that the piping is drained. 4. Purging the MOGAS system. a. Open the following valves: (1) Drain tank vent valve. (2) Drain tank valve. (3) Filter vent valve. (4) Crack open the Nz inert gas supply in the pump room. b. Monitor inertness at the filling station. c. Purge until 50% inertness is attained. 5. Inerting (charging the piping). a. Monitor the transfer pump and filter discharge gages. b. Close the N2 inert gas supply valve in the pumproom when 10 psi is reached. c. Report 10 psi on the piping. 6. Secure by closing the following valves: a. Filter vent. b. Fill line isolation valve. c. Flow meter inlet, outlet, and bypass valves. d. Transfer pump blow back, inlet, and discharge valves. e. f. g. h. Filter inlet, outlet, and bypass valves. Filter drain valves. Venturi discharge. Fueling station/fill station isolation valve. GAS-FREEING THE MOGAS SYSTEM All gasoline tanks, voids, and piping must be certified “Safe For Men/Safe For Hot Work” by the Gas Free Engineer before any work is done on the 6-24