Dairy facilities are recognized to be significant sources of volatile organic compounds (VOCs), which contribute to high summertime ozone concentrations in central California. They are generally not considered to be an important source of NOx, but a few studies reported in the literature suggest that silage can produce NO. Concentrations of VOCs, NOx, and ozone were measured at a central California dairy using a combination of online and offline techniques. Summertime ozone levels were found to be lower and NO concentrations higher at the dairy compared with levels at an air district monitoring site located approximately two miles away. Flux chamber measurements of NOx emissions from silage samples in the laboratory indicate that emissions from silage might account for the high NO concentrations observed at the dairy. Implications of these results will be discussed.

Emissions of ozone precursors from a central California dairy facility

244th National Meeting (2012)

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