Section 173-476-100 - Ambient air quality standard for PM-10(1) The twenty-four-hour average concentration of PM-10 in the ambient air must not exceed 150 [MICRO]g/m3 more than one time per year, on a three-year average.(2)Measurement method. The levels of PM-10 in the ambient air must be measured by: (a) A FRM based on 40 C.F.R. Part 50, Appendix J 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 K must be used.Wash. Admin. Code § 173-476-100
Adopted by WSR 13-24-010 (Order 12-05), filed 11/21/13, effective 12/22/2013