Air Quality Appendix
http://www.blm.gov/pgdata/etc/medialib/blm/mt/field_offices/miles_city/og_eis/vol2.Par.12441.File.dat/AirQualityApp.pdf

Bureau of Land Management: Montana State Office


This 33-page PDF is part of the final statewide oil and gas environmental impact statement and proposed amendment of the Powder River and Billings Resource Management Plans. This section is an air quality appendix for the Crow Reservation. Included is information about existing air quality, agency roles and authorities, air quality management on tribal lands, air quality impact assessment, modeling assumptions and results, and thresholds for triggering mitigation.

This resource is referenced here:
Subject: Geoscience:Atmospheric Science:Meteorology:Air quality, Environmental Science:Air Quality
Resource Type: Scientific Resources:Overview/Reference Work