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What formal health studies have been done that justify the 8-hour ozone standard?

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What formal health studies have been done that justify the 8-hour ozone standard?

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The 8-hour average ozone National Ambient Air Quality Standards is a health-based standard. According to former Environmental Protection Agency (EPA) Administrator Carol Browner in testimony before Congress[21], this standard is the product of one of the most thorough and extensive scientific reviews ever conducted by the EPA. When the EPA set the 8-hour ozone pollution standard in July 1997, it based its findings on an in-depth scientific review of recent studies of ozones health effects, as is discussed in the following excerpt (text in italics) from the Fact Sheet on EPAs Revised Ozone Standard, published July 17, 1997 and available on-line at http://www.epa.gov/ttn/oarpg/t1/fact_sheets/o3fact.pdf : Scientific assessment process for National Ambient Air Quality Standards When EPA reviews a national ambient air quality standard, such as ozone, it develops a “criteria document” that represents a compilation and scientific assessment of all the health and welfare information available

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