This report documents and reviews state-of-the-art methods for the measurement of polycyclic organic matter (POM) and other hazardous organic materials which are present in industrial stack emissions. Measurement methods for many hazardous compounds, such as POM and nitrosamines, are presented and, where specific methods have not been previously reported, the sections dealing with recommended methods provide useful guidance. Individual chapters are devoted to analytical methodology and stationary source sampling methodology, although an effective measurement strategy demands input from each protocol. An attempt is made to present a unified approach to hazardous organic emission measurement so that future studies may benefit through more realistic intercomparisons and more precise and accurate measurements.