EE HAD BEEN ASSIGNED TO PERFORM CLEAN-UP WORK IN THE PLANT. THIS INVOLVED SHOVELING PILES OF CEMENT. CLINKER AND OTHER LOOSE MATERIAL ON TOP OF THE CLINKER SILO FOR ABOUT 4 HOURS ON OCT 23RD. HE REPORTED THAT HIS LEFT ARM WAS SWOLLEN ON MONDAY AND BECAME MORE PAINFUL ON TURESDAY WHEN HE DID MORE SHOVELING. HE INDICATED THAT HE WAS REACHING OUT FURTHER THAN NORMAL WITH A LOADED SHOV