The document specifies sampling, cleanup, and analysis procedures for the determination of polycyclic aromatic hydrocarbons (PAH) in ambient air. It is designed to collect both gas-phase and particulate-phase PAH and to determine them collectively. It is a high-volume (100-250 l/min) method capable of detecting sub-ng/m3 concentrations of PAH with sampling volumes up to 350 m3. The method has been validated for sampling periods up to 24 hours. Precision and uncertainty under normal conditions can be expected to be ± 35-50 %. The document describes a sampling and analysis procedure for PAH that involves collection from air on a combination fine-particle filter and sorbent trap and subsquent analysis by gas chromatography/mass spectrometry (GC/MS).