EE WAS LIFTING A 60-70# BUCKET OF AGGREGATE TO DUMP IT INTO THE SAMPLE SPLITTER. BUCKET WAS SITTING ON THE FLOOR AND NEEDED TO BE DUMPED IN SPLITTER (~39"" HIGH). EE REPORTED THAT HE FELT SOM ETHING ""PULL"" IN HIS LOWER BACK OR RIGHT HIP WHILE ATTEMPTING TO LIFT. THIS BECAME REPORTABLE ON 9/22/09 AFTER EE WAS MOVED TO DIFFERENT POSITION DUE TO ADDITIONAL RESTRICTIONS.