EMPLOYEE, MAINT MECHANIC, BEGAN WELDERS TRAINING ON 11-26-01. ACTUAL WELDING OF MATERIALS IS PART OF THE TRAINING. ON 12-14-01, HE HAD WELDED TWO PIECES OF PLATE. HE WAS USING A WHEEL GRINDE R TO REMOVE EXCESS SLAG FROM THE WELD. A PIECE OF SLAG FLEW UNDERNEATH HIS FACE SHIELD AND CAUSED EYE IRRITATION. MEDICATION PRESCRIBED. EE IS NOT LOSING TIME OR ON RESTRICTIONS.