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Air Emission Measurement Center (EMC)

Broadly Applicable Approved Alternative Test Methods

These methods are approved alternatives to the methods required by 40 CFR Parts 60, 61 and 63 as described by the General Provisions of the corresponding Parts and as further explained in a Federal Register notice dated January 30, 2007. As such, the methods may be used by sources for determining compliance with the requirements of these Parts per their specified applicability provisions without further EPA approval. The Administrator, or designee (currently Steffan Johnson, Group Leader of the Measurement Technology Group in the Air Quality Assessment Division of the Office of Air Quality Planning and Standards), has approved these methods for the specified applications; this approval has been documented through an official EPA letter. These methods include quality control and quality assurance procedures that must be met. The EPA staff may not necessarily be the technical experts on these methods.

The Federal Register approval notices and the Alternative Test Methods are available below. 

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Federal Register Notices Formally Approving Alternate Test Methods

Federal Register Notice
Approval Date
Alternative Test Methods (ALT) Effected
March 5, 2018 ALT-120, 121, 122
December 21, 2016 ALT- 114, 115, 116, 117, 118, 119, 120
February 10, 2016 ALT-109, 110, 111, 112, 113
February 23, 2015 ALT-105, 106, 107, 108
March 12, 2014 ALT-105, 106, 107, 108
February 15, 2013 ALT-91, 92, 93, 94, 95, 96, 97
February 15, 2012 ALT-68, 81, 82, 84, 85, 86, 87, 88, 89, 90
February 22, 2011 ALT-64, 65, 66, 67, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80
February 22, 2010 ALT-51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63
February 26, 2009 ALT-50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63
April 7, 2008 ALT-32, 34, 35, 36, 37, 38
January 30, 2007 ALT-14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31

Approved Alternative Test Methods

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