The Arizona Department of Environmental Quality proposed to repeal Title 18, Chapter 2, Appendix 10, Evaluation of Air Quality Data; Appendix 11, Allowable Particulate Emissions Computations; and references to these two appendices in Title 18, Chapter 2, Article 2, Ambient Air Quality Standards; Area Designations; Classification (R18-2-216) and Title 18, Chapter 2, Article 7, Existing Stationary Source Performance Standards (various rule sections). The agency has determined the information in the appendices is out of date and does not comply with current monitoring protocols as designated by EPA. Comments are due September 30, 2008. http://www.azsos.gov/public_services/Register/2008/34/proposed.pdf pp. 3267-3285.