Guidelines & Tools Network Design Criteria for Ambient Air Quality Monitoring (40 CFR Appendix D to Part 58) Published 2014 Share SHARE Facebook share Twitter LinkedIn Copy URL Email Download Download CFR-2023-title40-vol6-part58-appD.pdf en Added on: 20 May, 2025 Breadcrumb Home Resource Library Network Design Criteria For Ambient Air Quality Monitoring (40 CFR Appendix D To Part 58) US Federal Law that prescribes AQ monitoring methods and requirements under the Clean Air Act. This is generally more detailed than many agencies would use as guidance to get started, but it provides a comprehensive listing of the requirements and contains many references to materials that would be useful at various stages of developing an AQ monitoring program.