Abstract: EMPLOYEE #1 WAS APPLYING A COAL TAR PITCH WATERPROOF COATING TO A SEWER PIPE. HE WAS WEARING A FULL FACE AIR LINE RESPIRATOR, WORKING INSIDE THE SEWER PIPE. HE WAS 20 FEET BELOW THE SURFACE AND 100 FEET INTO THE PIPELINE. EMPLOYEES #2 AND #3 WERE OUTSIDE THE PIPE HELPING EMPLOYEE #1 WITH THE AIR LINE AND THE SPRAYING EQUIPMENT. BREATHING AIR WAS PROVIDED BY AN INGERSOLL RAND OIL-LUBRICATED COMPRESSOR. THE COMPRESSOR HAD NO AIR RECEIVER, NO CARBON MONOXIDE ALARM AND NO HIGH TEMPERATURE ALARM. EMPLOYEE #1 DIED OF CARBON MONOXIDE POISONING. THE CARBON MONOXIDE HAD BEEN GENERATED BY THE COMPRESSOR AND SUPPLIED TO EMPLOYEE #1 THROUGH THE AIR LINE. EMPLOYEES #2 AND #3 TRIED TO RESCUE EMPLOYEE #1 BUT WERE OVERCOME BY THE COAL TAR PITCH FUMES. THEY WERE NOT PREPARED TO HANDLE THE EMERGENCY. EMPLOYEE #2 WAS HOSPITALIZED AND EMPLOYEE #3 WAS SENT HOME.