EE WAS LAYING ON HIS BACK REMOVING BOLTS FROM SKHAKER SCREENS USING AN AIR IMPACT WRENCH. THE EE HAD ON RX GLASSES WITH SIDE SHIELDS. DIRT FELL ONTO HIS FACE AND GLASSES AND EYES. HE ROLLED OV ER TO CLEAR THEM & WENT BACK TO WORK. CAME IN THE NEXT DAY WITH HIS LEFT EYE SWOLLEN, RED AND TEARING.