News & Updates

Stay up to date with the latest news, updates, and insights from VR Smoke School

Individual performing an EPA Method 22 observation on a gas flare in the field.

October 1, 2026

Using EPA Method 22 to Observe Visible Emissions

Learn how to perform an EPA Method 22 visible emissions observation, including observer positioning, stopwatch timing, emission frequency calculation and Method 9 differences.

Man making EPA Method 9 observations on black and white visible emissions in the field.

September 15, 2026

Using EPA Method 9 to Determine Opacity in the Field

Learn how to use EPA Method 9 in the field to determine the opacity of black and white visible emissions, including sun position, viewing angle, wind, backgrounds and 15-second readings.

Individual in the field determining the opacity of black smoke being emitted from an industrial smoke stack.

August 20, 2026

How to Determine Black Smoke Opacity At Smoke School

Check out this video that shows you how to determine the opacity of black smoke on a smoke school test. It includes a helpful tip on setting a range when assessing the opacity of black visible emissions.

Individual in the field determining the opacity of white smoke being emitted from an industrial smoke stack.

August 20, 2026

How to Determine White Smoke Opacity At Smoke School

Check out this video that shows you how to determine the opacity of white smoke on a smoke school test. It includes a helpful tip on setting a range when assessing the opacity of white visible emissions.

Results of a EPA-published study showing VR Smoke School students observe opacity more accurately than students trained at in-person smoke school.

August 19, 2026

VR Smoke School Student Accuracy Results from an EPA Study

EPA-published study results show VR Smoke School-trained observers were 55.1% more accurate on white smoke and 25.5% more accurate on black smoke.

EPA Method 9 certified observer making opacity observations on visible emissions from a smoke stack and the quick reference sheet next to the observer.

August 18, 2026

Free EPA Method 9 Reference Sheet for Visible Emissions Observers

Download our free EPA Method 9 Reference Sheet with field observation requirements, practical opacity tips and common plume shapes. No credit card required.