d. Transfer pumps pressure gage cutout valves. 2. Crack open the Nz inert gas valve. The filling station will monitor and determine when the piping is inerted to a 50% inert gas concentration. 3. When ordered, charge piping to 10 psi by ob- serving pump discharge line pressure gages. When the gages indicate 10 psi, close the Nz inert gas valve. 4. Secure all distribution piping valves IAW CFOSS. STRIPPING THE MOGAS TANKS As stated earlier, there are two stripping systems installed in the MOGAS tank. They are the hand-op- erated and the motor-driven systems. Hand Stripping Procedures To hand strip the MOGAS tank with the hand- stripping pump, use the following procedures: 1. Make sure the following valves are closed: a. Motor-driven stripping pump suction and discharge. b. Isolation valves to and from the MOGAS service system. c. Portable eductor hose hookup to the overboard discharge. 2. Open the following valves: a. Hand-stripping pump suction valve. b. The designated tank valve (drawoff or outer). c. The designated valve for receiving the pump discharge (overboard or outer tank). 3. Report that the hand-stripping pump is aligned. 4. Operate the hand-stripping pump and strip until an acceptable sample is obtained or the tank is empty (based on the purpose for stripping). 5. Report that stripping is complete. 6. Close the following valves: a. Designated tank suction valve. b. Designated discharge valve. c. Stripping pump suction valve. 7. Report that stripping alignment is secured. Motor-Driven Stripping Procedures The motor-driven stripping system is typical] y used to deballast the MOGAS tank. To deballast the MOGAS tank, use the following procedure: 1. Vent the tank to the atmosphere prior to debal- lasting. 2. Make sure the following valves are closed: a. valve. b. valve. c. d. e. valve. f. MOGAS transfer pump suction isolation MOGAS transfer pump discharge isolation Stripping pump test connection valve. Eductor overboard discharge connection. Hand-stripping pump overboard discharge Stripping pump isolation valve. 3. Open the following valves: a. Overboard discharge line. b. Stripping pump suction and discharge valves. 4. Report valve alignment complete. 5. To deballast the draw-off tank: a. Open the draw-off tank stripping valve. b. Start the stripping pump. c. Observe the sight glass and when no liquid is visible, stop the pump. d. Close the draw-off tank stripping valve. 6. To deballast the outer tank: a. Open the outer tank stripping valve. b. Start the pump. c. Observe the sight glass and when no liquid is visible, stop the pump. d. Close the outer tank stripping valve. 7. To secure from deballasting: a. Make sure the outer tank stripping valve is closed. b. Make sure the drawoff tank stripping valve is closed. c. Close the stripping pump suction and discharge valves. 6-22