EMPLOYEE WAS OPERATING THE FUEL TRUCK. RAINY/ MUDDY CONDITIONS. AS HE ATTEMPTED TO MOUNT THE REAR DECK OF THE FUEL TRUCK, HIS LEFT FOOT SLIPPED AND HE STRUCK HIS SHIN ON THE EDGE OF THE DECK. THIS RESULTED IN A BRUISED/ SCRAPED AREA APPROX 6"" LONG ON HIS SHIN. SWELLING/EDEMA OF AREA OF TIBIA FIBULA.