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 Washington Administrative Code (Last Updated: November 23, 2016)
 Title 173. Ecology, Department of (See Titles 197, 317, 372, and 508)
 Chapter 173-476. Ambient air quality standards.

  Section 173-476-150. Ambient air quality standard for ozone.  

Latest version.
  • (1) Standard for ozone. The three-year average of the annual fourth highest daily maximum eight-hour average concentration of ozone in the ambient air must not exceed 0.070 ppmv.
    (2) Measurement method. The levels of ozone in the ambient air must be measured by:
    (a) A FRM based on 40 C.F.R. Part 50, Appendix D and designated according to 40 C.F.R. Part 53; or
    (b) A FEM designated according to 40 C.F.R. Part 53.
    (3) Interpretation method. The interpretation method found in 40 C.F.R. Part 50, Appendix U must be followed.
    [Statutory Authority: RCW 70.94.152, 70.94.331, 70.94.860. WSR 16-12-099 (Order 16-01), § 173-476-150, filed 5/31/16, effective 7/1/16. Statutory Authority: Chapter 70.94 RCW. WSR 13-24-010 (Order 12-05), § 173-476-150, filed 11/21/13, effective 12/22/13.]
RCW 70.94.152, 70.94.331, 70.94.860. WSR 16-12-099 (Order 16-01), § 173-476-150, filed 5/31/16, effective 7/1/16. Statutory Authority: Chapter 70.94 RCW. WSR 13-24-010 (Order 12-05), § 173-476-150, filed 11/21/13, effective 12/22/13.