I am installing a power pedestal (a 120 v gfi and a 250 v outlet for a water pump) on awater and chemical loading site for agricultural spray planes. The customer wants to run underground pipe from his jet "a" fuel containment area tank 25 feet away out to the loading site and then set a hose reel near my pedestal. What are the hazardous boundaries to this reel? I have rigid conduit stubbed up 20 inches above the concrete loading area for the pedestal.