At around 1800 hrs on Monday Manakin units were dispatched to Hermitage Country Club for a gas leak. E11 and S17 arrived and found a propane tank leaking behind the structure. Crews monitored the air and had 50% LEL. E11 quickly stretched a 1 3/4 and cut the fuel off to the leaking regulator. Crews cleared up and returned to service. Units: E11, S17, R10.