40 CFR Appendix Table F-3 to Subpart F of Part 53 - Table F–3 to Subpart F of Part 53—Critical Parameters of Idealized Ambient Particle Size Distributions

Table F–3 to Subpart F of Part 53—Critical Parameters of Idealized Ambient Particle Size Distributions

Idealized Distribution	Fine Particle Mode			Coarse Particle Mode			PM 2.5/PM 10 Ratio	FRM Sampler Expected Mass Conc. (µg/m ³)
Idealized Distribution	MMD (µm)	Geo. Std. Dev.	Conc. (µg/m ³)	MMD (µm)	Geo. Std. Dev.	Conc. (µg/m ³)	PM 2.5/PM 10 Ratio	FRM Sampler Expected Mass Conc. (µg/m ³)
Coarse	0.50	2	12.0	10	2	88.0	0.27	13.814
“Typical”	0.50	2	33.3	10	2	66.7	0.55	34.284
Fine	0.85	2	85.0	15	2	15.0	0.94	78.539