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Welcome to EPA Region 9's Air emissions test method home page. This Web site contains links to EPA reference test methods and EPA Region 9 approved alternative methods.

Alternative test methods are test methods that have been determined by US EPA, Region 9, to be technically acceptable for inclusion into the State Implementation Plan (SIP) or for use in conjunction with SIP approved rules. Because certain test methods may not be appropriate in all instances, EPA Region 9 reserves the right to determine the appropriateness of any alternative test method for compliance determinations in new or revised SIP rules. Mention of a specific firm or product does not constitute EPA endorsement of that firm or product.

Unless specifically stated in the approval letter for a test method, these alternative methods are not approved for use to determine compliance with Federal Regulations and Standards including, but not limited to the following:

Accessing Alternative Test Methods

You can access copies of approved alternative test methods below. Please note that although these organizations may have more test methods than those listed in the links, these are the only ones that have been approved for use in SIP rules. In some cases, EPA has determined that some district/State methods do not affect measurement of criteria pollutants or hazardous air pollutants and therefore, do not require approval for use in SIP rules.

Terms and Abbreviations (See 40 CFR 60.2)

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