%0 Journal Article %A Elena C McDonald-Buller %A David T Allen %A Nancy J Brown %A Daniel J Jacob %A Daniel Jaffe %A Charles E Kolb %A Allen S Lefohn %A Samuel J Oltmans %A David D Parrish %A Greg Yarwood %A Lin Zhang %B Environmental Science & Technology %D 2011 %N 22 %P 9484 - 9497 %R 10.1021/es2022818 %T Establishing Policy Relevant Background (PRB) Ozone Concentrations in the United States %V 45 %8 11/2011 %! Environ. Sci. Technol.