The B[a]Peq-based approach is necessarily limited
to a few PAHs that have monitored in ambient air and
dose not account for the toxicity of all PAHs to which
the general population is exposed. Moreover, the ad-
ditivity assumption of this approach is quite uncertain
and may lead to inaccurate assessments. Despite this
limitation, this approach has the merit of taking into
account the actual PAH profiles encountered in envi-
ronmental settings reported in this study.