Abstract
Exposures of longshoremen to carbon monoxide from fork lift trucks used in holds of ships were evaluated by use of the expired air method for determining carboxyhemoglobin. Results indicated that if the net increase in carboxyhemoglobin was considered, then the hazards potential of utilizing gasoline driven fork lifts in the holds would be considered of low order of magnitude. Moderate to heavy cigarette smoking was probably as important a factor in individual carbon monoxide adsorption as being exposed to CO at the Threshold Limit Value (TLV).