Abstract: In February 1997, a pilot study was set up to evaluate the use of open-path Fourier Transform Infrared (OP-FTIR) technology for the determination of emission factors for ammonia at a dairy farm, alfalfa field, and waste water treatment plant in the San Joaquin Valley. In addition to the OP-FTIR monitoring, point sampling using active and passive denuder samplers and meteorological monitoring were also carried out. Limited tracer releases were made at the dairy farm and waste water treatment plant to assist in determining emission rates. This paper describes the OP-FTIR monitoring, tracer releases, meteorological monitoring and the resulting data with the implications for the determination of emission factors and improvements for future studies. !5
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