EE CLAIMED THAT HE TRIPPED OVER A PUMP SUPPORT STAND, AN AREA THAT IS NOT A WALKWAY WHILE INSPECTING A SUMP. AS HE CAME DOWN OFF THE PAD, HE LANDED ON HIS KNEE IN AN AWKWARD POSITION AND TWIST ED IT. EE CONTINUED WORK NEXT 2 WEEKS WITHOUT NOTIFICATION TO EMPLOYER. ON 7-19-02 EE RAN TO TURN ON/OFF A PUMP & WHILE RUNNING FELT A POP IN HIS KNEE. IT WAS LATER DETERMINE TO BE A SPRAINED