EE STATED THAT HE STOOD ON THE MOTOR BASE OF THE NO.1 GLAND WATER PUMP. THAT IS APPROX. 10 INCH OFF THE FLOOR. IN ORDER TO TIGHTEN A PIPE FITTING OF THE FREST WATER LINE FOR THE NO. 2 GLAND WA TER PUMP, THAT WAS LEAKING. EE STATED THAT AFTERTIGHTENING THE FITTING HE TURNED HIS RIGHT ANKLE WHEN HE STEPPED DOWN FROM THE MOTOR BASE ONTO METAL GRADING ON THE PLANT FLOOR.