Divided CASAC Endorses Retaining Ozone NAAQS Despite Risk Concerns

February 12, 2020
A majority of EPA’s divided Clean Air Scientific Advisory Committee (CASAC) is backing agency staff’s draft recommendation to retain the existing suite of ozone ambient air standards, clearing the way for EPA to propose leaving the limits in place despite concerns from one panelist that the existing limit to protect human health is too weak. And many panelists are also warning EPA of significant flaws in the agency’s risk methodology for conducting reviews of its ambient air limits, and urging...

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