The "Ambient Air Pollution and Meteorological Monitoring Guidance" document explains procedures for private companies and other governmental agencies monitoring air quality and meteorology voluntarily, or to meet requirements of the Colorado Air Pollution Control Division (APCD). The document discusses how to prepare an ambient air and meteorological monitoring plan for division approval. It discusses content, format, and submittal of the plan. It explains APCD guidance regarding siting, equipment, quality assurance, and quarterly reporting of air quality and meteorological data. The document also contains a useful appendix of relevant federal air monitoring guidance.