WHILE REPAIRING VARIOUS PARTS OF THE PLANT-PRYING, LIFTING, PULLING, THE EE INJURED HIS BACK. WHILE TIGHTENING SPRAY BARS THE EE FELT SOME PAIN,BUT CONTINUED TO WORK. THE EE WENT TO THE ER ON 3-18-01 WITH BACK PAIN. DR. GAVE MEDS AND TOLD TO FOLLOWUP W/PERSONAL DR. THE EE CALLED OFF 3-19 & 3-20 AND FOLLOWED UP W/WORKERS' COMP. DR ON 3-21-01. WORKERS' COMP DR SAYS POSSIBLE HERNIATED