EE WAS TRYING TO CLEAR A BAG BLOCKAGE ON A BAG CONVEYOR BELT WHEN SHE STRAINED A MUSCLE IN HER LOWER BACK. SHE SAID THAT SHE HAD BENT FORWARD TO STRAIGHTEN THE BAG ON THE BELT. SHE DID NOT HAVE TO LIFT THE BAG ONLY SHIFT IT ON THE BELT. THE BAG WEIGHED 70 LBS.