CFR promulgated test methods have been in the Federal Register as final rules. This web site provides downloadable official, legal Federal Register Versions.
Federal Register proposed test methods have been published in the Federal Register as proposed rules, but have not yet been promulgated.
These methods are approved alternatives to the methods required by 40 CFR Parts 60, 61 and 63. As such, they may be used to determine compliance with the requirements of these Parts without further EPA approval.
These methods are potentially subject to change based on the review of additional validation studies or on public comment as a part of adoption as a Federal test method.
The methods in this category are not likely to be technically supported by EPA staff and are more likely to change based on the review of additional validation studies or on public comment prior to adoption as a Federal reference method.
The EMC provides technical expertise and guidance specific to the implementation of the emission testing methods.
This US EPA web site is a rich resource for information on all aspects of air quality, both in technical language for environmental professionals and in plain English for lay people.
In 2000, the Office of the Federal Register (OFR) and the Government Printing Office created the Electronic Code of Federal Regulations (e-CFR) prototype. The OFR updates the e-CFR prototype on a frequent basis, providing the public with up-to-date access.
The Federal Register is the daily publication for rules, proposed rules, and notices of Federal Agencies.
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This web site includes resources to explore the Federal Register and the Code of Federal Regulations.