Alternative test method
Alternative test method means any method of sampling and analyzing for an air pollutant that has been demonstrated to the Administrator's satisfaction, using Method 301 in appendix A of this part, to produce results adequate for the Administrator's determination that it may be used in place of a test method specified in this part.
Source
40 CFR § 63.2
Scoping language
The terms used in this part are defined in the Act or in this section as follows: