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Source TestingGeneral

Many permits include permit conditions that require source tests, either an initial construction-related source test or a periodic source test (the latter are typically annual). Source tests can be required by the District engineering process or by State or Federal testing requirements, and are also known as compliance tests.


The source testing permit condition should always specify when the source test report is due - it is the responsibility of the owner/operator to schedule all aspects of the source test in order to comply with the specified reporting deadline.


The District also requires all source tests to be performed in accordance with the District Compliance Test Procedural Manual. A useful resource is the CARB test method page.

TEst Parameter Typical Test Frequency Misc Notes
Gaseous Three 60 minute runs
Fine Particulate Three 60 minute runs front and back half

Sample Audit Program

Certain stationary sources subject to applicable requirements to conduct compliance testing under 40 CFR parts 60, 61, and 63 are responsible to obtain and use audit samples.  Audit samples challenge the critical components of each source test procedure, from sample collection to sample analysis. 

Any source that is required to conduct compliance testing using an EPA test method found in Parts 51, 60, 61 or 63 is required to use audit samples if they are available. The rule does exempt several methods which already have sufficient calibration and quality assurance requirements or determine visible emissions by observation and therefore, there is no practical way to audit them. Those methods are Methods 3C, 6C, 7E, 9, 10, 18, 20, 25A, 303, 318, 320, and 321.  

Testers shall follow the stationary source audit sample program ( and coordinate with the Facility, Laboratory, and Regulatory Agency to plan and schedule the stationary source test and to plan for appropriate audit sample(s).   Note that in the past the District provided samples however that is no longer the case.

A list of the available audit samples is provided on EPA website ( along with a list of accredited audit sample providers (AASPs). The list will be updated as new information becomes available.

Contact person: Chris Anderson at

Last updated: 7/9/2015 2:59:49 PM