WHILE ATTEMPTING TO LOOSEN A FITTING, A 1"" VALVE CAME OFF THE MANIFOLD AND COMPRESSED AIR BLEW ONTO EMPLOYEE'S LEFT FOREARM AT APPROXIMATELY 104 PSI. HE WAS TAKEN TO THE ER FOR EVALUATION AND TREATED FOR SEVERE ABRASION WITH EMBEDDED PARTICLES IN HIS LEFT FOREARM. HE WAS REQUIRED TO FOLLOW UP WITH A REGULAR DOCTOR WHO RECOMMENDED DAILY DRESSING CHANGES & PLACED HIM ON RESTRICTIONS.