The Department of Ecology adopted Wash. Admin. Code §173.476. The new rule contains the federal ambient air quality standards for large and small particles (PM-10 and PM-2.5), lead, sulfur oxides, nitrogen oxides, ozone, and carbon monoxide. Changes took effect December 22, 2013. See http://apps.leg.wa.gov/documents/laws/wsr/2013/24/13-24-010.htm.