Update of PM2.5 Data for the T640/T640X PM Mass Monitors

Activity

American Lung Association filed 1 comment on this docket between Mar 19, 2024 and Mar 19, 2024. 3 other organizations filed here. The comment window closed 865d ago.

What American Lung Association filed (1)

Abstract

The EPA is taking action to retroactively apply the approved modification of the Federal Equivalent Method (FEM) designation for the Teledyne Advanced Pollution Instrumentation Model T640 PM mass monitor including the 640X option (hereto T640 and T640X) to all of the PM2.5 concentration data from the T640 and T640X monitors in the EPA’s Air Quality System (AQS) that was sampled prior to the modification. This update, which will be applied to the unmodified hourly PM2.5 concentration data in AQS using collocated ambient temperature when available, is expected to result in a much higher number of PM2.5 monitoring sites using these methods meeting the bias measurement quality objectives (MQOs) (Section 2.3.1.1, Appendix A to Part 58, Title 40).

• American Lung AssociationTHIS ORG

  1 filing · confidence 85%
• Association of Air Pollution Control Agenciestrade assoc.

  1 filing · confidence 85%
• Center for Biological Diversity

  1 filing · confidence 97%
• National Ambient Air Quality Standards (NAAQS) Regulatory Review & Rulemaking Coalitiontrade assoc.

  1 filing · confidence 85%