EE WAS DOING ROUTINE DUTIES AS PREHEAT TOWER LABORER. WHEN HE BECAME NAUSEOUS AND VOMITED. HE STOPPED WORKING AND RESTED WHILE DRINKING SOME SPOT DRINK. AFTER A SHORT TIME HE BEGAN HIS DUTIES AGAIN BUT GOT SICK AGAIN. SO HE WENT TO THE SHOP TO GET ELECTROLYTE TABLETS AND REST. SUPERVISOR TOLD HIM TO GO TO AIR CONDITIONED CONTROL ROOM BUT HE FELT HE WAS OK AND WENT BACK TO WORK WHEN