EE WAS CLEANING OUT THE -PIT UNDER TRUCK SCALES. WHILE SCOOPING MATERIAL INTO VACUUM HOSE, HE GOT HIS HAND SUCKED INTO VACUUM HOSE UP TO HIS ELBOW. EE WAS UNABLE TO REMOVE HIS HAND/ARM BECAUSE IT WAS AROUND A BEAM. EE HAD NO ROOM TO MAEUVER DUE TO THE TIGHT QUARTERS HE WAS WORKING IN. HE CALLED TO EE WORKING ABOVE THE PIT TO SHUT OFF THE VACUUM, AT WHICH TIME HE WAS ABLE TO REMOVE