National Ambient Air Quality Standards for Particulate Matter
air-emissions · Rule · Published 1998-02-05 · 63 FR 6032
Document
Document number
98-2878
Federal Register citation
63 FR 6032
CFR reference
40 CFR 50
Type
Rule
Action
Final rule.
Category
air-emissions
Publication date
1998-02-05
EPA docket
AD-FRL-5961-6
Abstract
On July 18, 1997, EPA announced a supplemental comment period for the limited purpose of taking comments on certain field and laboratory test results associated with the development of the reference method (Appendix L of 40 CFR Part 50) for measuring particles with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers (PM<INF>2.5</INF>) in the ambient air. In the announcement, EPA indicated that upon the close of the comment period it would decide whether any further action would be appropriate. Having carefully assessed the comments received, EPA has determined that no further action is necessary.