EMPLOYEE WAS USING AN 8 LB SLEDGEHAMMER TO OPERATE AN ANGLE VALVE ON A TANK. AS HE STRUCK THE VALVE THE SLEDGEHAMMER BOUNCED BACK AND STRUCK HIM ABOVE HIS LEFT EYEBROW. THE RESULT WAS A LACERA TION THAT REQUIRED 3 SUTURES TO CLOSE. NO ADDITIONAL INJURIES SUSTAINED AND NO LOST TIME OR RESTRICTED DUTY.