A laboratory technician at a synthetic butadiene rubber manufacturing plant alleged that his exposure to the probable carcinogen while collecting and analyzing product samples from reactors caused his blood disorder. Baker & O’Brien assessed his exposures based on his regular work activities by reviewing the reaction rate/product composition data and modeling near-air dispersion. Our expert report, which compared calculated exposures from empirical data to nationally recognized exposure studies, refuted the opposing expert’s opinions and facilitated the resolution of the dispute.