Validation of a Method for Estimating Pollution Emission Rates From Area Sources Using Open-Path FTIR Spectroscopy and Dispersion Modeling Techniques

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Abstract
This paper describes a methodology developed for the purpose of estimating emissions factors of organic compounds from a variety of different area sources in a rapid and cost effective manner. The methodology involves the use of an open-path fourier transform infrared (FTIR) spectrometer to measure concentrations of hydrocarbon and other compounds in plumes emanating from area sources. Meteorological measurements are also collected and used in conjunction with an appropriate plume dispersion model to relate measured plume and background concentrations to an emission rate for the source. This study was conducted to validate the performance of the measurements methodology, and to support the development of measurements methodology protocols, field setup guidelines, data analysis procedures, and other information needed to conduct more effective and accurate measurements. Based on the results, it appears that the methodology is capable of estimating the emissions from an area source with an accuracy of at least ± 25 to 30 percent.

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