OUR ELECTRICAL SUPERINTENDENT WAS CALLED TO CHECK ON A PROBLEM AT THE #1 PUMP HOLE SECTION ON 8-6-01 AT APPROX. 1320. HE GOT TO THE #1 PUMP CONTROL STATION AT 1330 AND BEGAN TO STEP DOWN INTO THE PUMP STATION FLOOR WHEN HE BUMPED A STAND PIPE CAUSING YELLOW JACKET HORNETS TO SWARM HIM AND STING HIS LEFT HAND. WHILE ATTEMPTING TO GET AWAY QUICKLY HE TRIPPED & TWISTED HIS LEFT ANKLE