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EPA Response to Enbridge Spill in Michigan

Air Data

EPA air sampling data

Air samples for oil-related volatile organic compounds (VOCs)

Sample data from July 28 - August 27, 2010
(8- hour SUMMA, 24-hour SUMMA, and Tedlar bag sampling)

Posted September 8, 2010

Air Sampling Results on Enbridge's website Exit EPA Disclaimer

Understanding EPA's air data

EPA is overseeing Enbridge’s sampling and monitoring efforts. The tools being used provide information about the levels of chemicals in the air. To evaluate the chemical monitoring information, public health scientists compare air sampling results to health-based screening concentrations (also called “screening levels”). These screening levels are developed from health effects information about each volatile organic chemical (VOC). Screening levels assume a person is breathing a pollutant continuously (24 hours a day, seven days a week) for as long as one year. The screening levels are considered protective for up to one year of exposure. They are based on various criteria and some of the values are protective for durations longer than one year.

Enbridge VOC screening levels (PDF) (2pp, 63K) August 13, 2010


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