Portland-Vancouver air quality maintenance area (Oregon portion) and Salem-Keizer area ozone maintenance plan

Title from PDF title page (viewed on February 23, 2018)."Adopted by the Environmental Quality Commission, February 22, 2007."This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references (page 32).Mode of access: Internet from the Oregon Government Publications Collection.Text in English