40 CFR 50, App J

40 CFR 50, App J

Determination of Ambient PM10

This method provides for the measurement of the mass concentration of particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM10) in ambient air over a 24-hour period for purposes of determining attainment and maintenance of the primary and secondary national ambient air quality standards for particulate matter specified in 40CFR §50.6. The measurement process is nondestructive, and the PM10 sample can be subjected to subsequent physical or chemical analyses.