EE STATED THAT HE HAD ONE OXYGEN AND TWO ACETYLENE CYLINDERS ON A CART. HE WAS MOVING THE EMPTY CYLINDERS FROM THE ELEVATOR TO THE STORAGE AREA AT COOKS BRANCH. HE FELT A PAIN IN HIS BACK. EE HAS A HISTORY OF BACK INJURIES. HE HAS BEEN DIAGNOSED AS HAVING DEGENERATIVE DISC DISEASE. HE ALSO WAS DIAGNOSED AS HAVING A NERVE ROOT INFLAMMATION.