EMPLOYEE WAS PUSHING AN OPEN HOPPER TO HELP IT DUMP WHEN HE OVEREXERTED HIMSELF AND AGGREVATED AN OLD INJURY (HERNIA). ORIGINAL INJURY OCCURRED APRIL 12, 2001 WHILE EMPLOYED AT IMV. PART OF BODY AFFECTED WAS THE RIGHT GROIN AREA. ASSOCIATE WORKED THE NEXT SCHEDULED SHIFTS THEN CALLED IN SORE MONDAY MORNING AND MISSED THE NEXT TWO SCHEDULED SHIFTS.