For a well designed and operated flue gas system experience
                           suggests that petroleum cargoes traditionally carried on product tankers
                           do not suffer contamination from the flue gas itself, as opposed to
                           contamination from other cargoes. However, unacceptable contamination
                           from the flue gas may be encountered if proper control is not exercised
                           over fuel quality, efficiency of combustion, scrubbing and filtering.
                        
                        
                        
                        
                        The more critical petrochemical cargoes which may be carried
                           by product carriers can be contaminated by flue gas.