While in process of transferring diesel fuel into mine via the #2 intake shaft, the fuel pipe leaked allowing approx. 400 gallons of diesel fuel to accumlate in #2 sump pump containment area. The mine was evacuated at 9:55am as precaution. Evacuation complete 10:05am, ret'd 7:45pm. The sump was pumped out. There was no damage to the hoist.