Method 9
Method 9 is the best-known visual opacity procedure. It qualifies an observer through black- and white-smoke testing and is commonly used for stationary-source opacity observations. Certification is valid for six months.
A practical certification path
Know what comes next.
Opaque Smoke School helps individual observers and company coordinators choose the appropriate training route, complete the required steps, and keep qualification records organized.
Method 22
Method 22 is used for visual determination of fugitive emissions and documents the presence or absence of visible emissions over an applicable observation period. Its purpose and procedure differ from Method 9 opacity readings.
Methods 203A, 203B, and 203C
The Method 203 series addresses visual determination of opacity for specific source categories and averaging approaches. Facilities should select training based on their permit, rule, source, and required observation procedure.
Choosing the right course
Start with the applicable permit or regulatory requirement. Opaque can help training coordinators understand the available course formats, but the facility remains responsible for confirming which method and approval pathway apply to its compliance obligations.