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# Test Methods Test methods can be divided into several categories : Category A: Methods Proposed or Promulgated in the FR Category B: Source CategoryApproved Alternative Methods Category C: Other Methods Category D: Historic Conditional Methods



### Interim Policy on Posting Methods A fundamental component of the EMC web site is to p rovide information regarding relevant methods and procedures for emission testing and mon itoring. We have modified our presentation of these methods into four different c ategories. The categories are based on the legal status of the methods with regard to thei r application under federally enforceable regulations. Each category is explained below and each includes stipulations for use of the methods included therein. Further provisions regarding the use of a specific method are contained within the applicability statement of the method. P lease note that the guidance provided by these categories and methods is meant to supplement , not override the stationary source emission measurement requirements of Title 40 of th e Codes of Federal Regulations (CFR) Parts 51, 60, 61, and 63. 

## Category A: Methods Proposed or Promulgated in the FR These methods have been proposed or promulgated in the Federal Register and codified in the Code of Federal Regulations (CFR). They carry a n xx, 1xx, 2xx, or 3 xx alphanumeric designation. The xx, 1xx, and 3xx numbered methods are directly cited by specific regulations for determining compliance under 40 CFR Parts 60, 61, and 63, and may be used by sources for application as cited by the reg ulations and the method itself without further EPA approval. The 2xx series methods are promulgated to facilitat e incorporation in applicable State Implementation Plans. The 2xx methods, like the xx, 1xx, and 3xx series methods, include quality control and quality assurance procedures th at must be met.



## Technology Transfer Network Emission Measurement Center http://www.epa.gov/ttn/emc/tmethods.html#CatC/

Lastupdated on Tuesday, August 07, 2007 

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4/20/2015 http://www.epa.gov/ttn/emc/tmethods.htmlEPA staff can provide technical support on all meth ods in this category.

Listof specific promulgated test methods List of specific proposed test methods 

## Category B: Source Category Approved Alternative Methods These methods are approved alternatives to the meth ods required by 40 CFR Parts 60, 61 and 63 as described by the General Provisions of th e corresponding Parts and as further explained in a Federal Register notice dated Januar y 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 fu rther EPA approval. The Administrator, or designee (currently Dr. Conniesue Oldham, Group Lea der 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 spec ified applications; this approval has been documented through an official EPA letter. The se 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. Federal Register Notice and List of Source CategoryApproved Alternative Methods 

## Category C: Other Methods This category includes test methods which have not yet been subject to the Federal rulemaking process. Each of these methods, as well as the available technical documentation supporting them, have been reviewed b y the Emission Measurement Center staff and have been found to be potentially useful to the emission measurement community. The types of technical information revie wed include field and laboratory validation studies; results of collaborative testin g; articles from peer-reviewed journals; peer-review comments; and quality assurance (QA) an d quality control (QC) procedures in the method itself. A table summarizing the availabl e technical information for each method can be found at the link below. The EPA strongly en courages the submission of additional supporting field and laboratory data as well as com ments in regard to these methods. These methods may be considered for use in Federall y enforceable State and local programs (e.g., Title V permits, State Implementati on Plans (SIP)) provided they are subject to an EPA Regional SIP approval process or permit veto opportunity and public notice with the opportunity for comment. The method s may also be considered to be candidates to be alternative methods to meet Federa l requirements under 40 CFR Parts 60, 61, and 63. However, they must be approved as alter natives under 60.8, 61.13, or 63.7(f) before a source may use them for this purpose. Cons ideration of a method's applicability for a particular purpose should be based on the stated applicability as well as the supporting technical information outlined in the table. The me thods are available for application without EPA oversight for other non-EPA program use s including state permitting programs and scientific and engineering applications. As many of these methods are submitted by parties o utside the Agency, the EPA staff may not necessarily be the technical experts on these m ethods. Therefore, technical support from EPA for these methods is limited, but the tabl e contains contact information for the developers so that you may contact them directly. A lso, be aware that these methods are 

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as a part of adoption as a Federal test method, the Title V permitting process, or inclusion in a SIP.
List of Other Methods 

## Category D: Historic Conditional Methods This category includes methods that were categorize d as conditional test methods before our method categories were revised. Because some of these methods have been cited in state rules and permits under their Conditional Tes t Method (CTM) designation, we have created a category for them and called it "HistoricConditional Methods". This category is closed and no new methods will be added to it. These CTMs have been evaluated by the Agency and ma y be applicable to one or more categories of stationary sources. The EPA confidenc e in a method included in this category is based upon review of various technical informati on including, but not limited to, field and laboratory validation studies; EPA understanding of the most significant quality assurance (QA) and quality control (QC) issues; and EPA confi rmation that the method addresses these QA/QC issues sufficiently to identify when th e method may not be acquiring representative data. The method's QA/QC procedures are required as a condition of applicability. CTMs in Category D may be used by State and local p rograms in conjunction with Federally enforceable programs (e.g., Title V permits, State Implementation Plans (SIP)) provided they are subject to an EPA Regional SIP approval pr ocess or permit veto opportunity and public notice and opportunity for comment. They are available for application without EPA oversight for other non-EPA program uses including state permitting programs and scientific and engineering applications. The methods in Category D, however, must be approve d as alternatives before a source may use them to meet Federal requirements under 40 CFR Part 60, 61, and 63. The EPA encourages the submission of additional field and l aboratory data to further support a method. The EPA staff may not necessarily be the technical experts on these methods. 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 (Category A).
List of Historic Conditional Methods 

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