There is a growing need for environmental measurement personnel who possess a solid understanding of the techniques of air pollutant sampling. This book explains the fundamentals of air sampling, develops the theory of gas measurement, and presents several "how-to" examples of calibration and use of air and gas sampling devices. Other topics covered range from the basics of pressure measurement to specific discussions regarding the use of a Volatile Organic Sampling Train or a SUMMA-polished canister sampling system. The book provides the basic information and specific techniques needed in the industrial hygiene, ambient sampling, and emission assessment fields.