Online EPA Method 2 Training: Air Emissions Testing Course

EPA Method 2: Isokinetic Air Emission Testing

EPA Method 2 is for the determination of the average velocity and volumetric flow rate of a gas stream. This method employs the principals of EPA Method 1 in selecting an appropriate measurement location and determining the minimum number of measurement points to provide reliable velocity and volumetric flow rate determination. This method is not suitable for cyclonic or swirling gas streams as identified in EPA Method 1.

Determining the flue gas velocity and volumetric flow rate are necessary components to determine isokinetic sample rates and also to determine mass emission rates of air pollutant emissions from regulated sources. The measured velocity and calculated volumetric flow rate are also useful tools when designing and sizing control devices, as well as performing engineering studies.

Having an understanding of the purpose and motives establishes a base to comprehend the why and what’s of the procedures in the EPA Method 2. The desired objective is to relate the knowledge of the method to practical application in actual measurements. Initial discussion in this lesson will provide background information for EPA Method 2. The balance of the discussion is a step by step field procedures to be performed in actual application.

Some material of Method 2 is incorporated by reference from other methods. To obtain reliable results, persons using this method should have a thorough knowledge of at least Method 1. Method 2 is not applicable at measurement sites that fail to meet the criteria of Method 1. EPA Method 2 can be utilized for most gas flue streams. Experienced individuals can apply the knowledge and experience of this method to other reference methods such as EPA Method 2A, 2C, 2D, 2F, 2G, and 2H.

Course Fee
$50.00 USD


  • Instant Access, Online, On-Demand
  • Certificate, Wallet Card, Scoresheet

For help call Toll-Free 866-523-9108

Group Discount Information

The course was very thorough and I liked that you can go back and review the materials.
—Jeanine C.


  • Introduction
  • Determination of Stack Gas Velocity and Volumetric Flow Rate
  • Type S Pitot Tube
  • Calculating the Average Velocity
  • Summary

Who Should Attend

This course is intended for individuals who participate in the measurement of air pollutants in stacks and ducts using isokinetic sampling methods.
  • sampling technicians
  • consultants & contractors
  • regulators
  • facility personnel
We assume that participants in this course have basic knowledge of general chemistry concepts.
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The overall objective of this course is to provide participants with a basic understanding of the concepts, equipment, procedures, and calculations required to perform EPA Method 2. The participant should be able to determine of the average velocity and volumetric flow rate of a gas stream.


Kevin Kitchen

Mr. Kitchen has been providing environmental services since 1987. His experience with many different industries brings a depth of knowledge and unique talents to handle challenging projects. Mr. Kitchen is a Qualified Source Testing Individual having completed levels I, II, III, and IV. Recognizing a need for practical instruction as air emission testing expands to more geographical areas, Mr. Kitchen developed this course to orient individuals in the procedures and techniques of air emission testing.

Contact Hours

2 Contact Hours
This represents the estimated time to complete the online course, including exercises. Actual times may vary from user to user.

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Satisfied clients in over 100 countries around the globe, spread across all seven continents.

Your Compliance Connection

The course fee entitles a single user to participate in the online course for at least six (6) months. Requests for additional time will be considered on a case-by-case basis, but are almost always honored. Hardcopy certificates are mailed (first class for domestic locations/standard airmail for international locations) and included in the course fee. Expedited shipping costs are additional.