H-Coal Pilot Plant. Industrial-Hygiene Personal Sampling Survey During Two Coal Operating Periods at the H-Coal Pilot Plant. Revised E and H-1

摘要

During two separate operating periods of coal liquefaction, volunteer workers at the H-Coal Pilot Plant in Catlettsburg, Kentucky were monitored for exposure to total particulates, coal tar pitch volatiles, benzo(a)pyrene, benzene, toluene, xylene (all isomers) and hexane using industrial hygiene personal monitoring equipment. A total of 376 samples were analyzed. Monitoring data showed that these volunteer workers' exposures were typically far below the threshold limit value (TLV) for each chemical, with only 3 excursions above the TLVs (0.8% of all samples). Of these 3 excursions, all occurred during process sampling activities. The majority of samples (73%) were below detectable limits (minimum analytical limits); notably, 97%, 88%, and 100% of samples for benzene, toluene, and xylene, respectively, were below detectable limits. (ERA citation 08:004096)