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Method 9 certification and program management for VR and in-person smoke school.

23/10/2026

Rain outside? You can still work through your Method 9 lecture online. Study from your own workspace with Opacity Vision VR.

Get started: https://opacityvision.com

21/10/2026

Did you know Ringelmann's gray smoke charts were made of black lines on white paper? From about 50 feet away or farther, the lines blended together and looked gray. More black ink made the chart look darker. People compared those shades with black smoke. These diagrams explain the idea; a screen image is not a calibrated chart.

Source:https://www.epa.gov/sites/default/files/2020-08/documents/vefieldmanual.pdf

17/10/2026

Take a look at how Method 9 testing works in Opacity Vision VR. Put on a compatible headset, open the testing area, and follow the on-screen steps.

Learn more: https://opacityvision.com

13/10/2026

Preparing for your Method 9 test? Practice reading smoke opacity with Opacity Vision VR.

Learn more: https://opacityvision.com

12/10/2026

White smoke can be harder to judge when it blends into the sky.

A background with contrasting color and visible detail gives you more to compare. Look at how much of that detail the smoke hides.

Practice reading smoke with Opacity Vision VR: https://opacityvision.com

09/10/2026

What opacity would you give this plume?

A) 30%
B) 40%
C) 50%

Leave your guess in the comments.

Preparing for Method 9 certification? Practice with Opacity Vision VR: https://opacityvision.com

08/10/2026

Can you train offline? No. Opacity Vision VR runs online, so the headset needs a working internet connection for lectures, practice and the test.

Before training day, connect the headset to the Wi-Fi you'll actually be using and run a short practice session. On a company network? Talk to your IT team early, because firewalls sometimes block new devices.

Preparing for Method 9 certification? Practice with Opacity Vision VR.
https://opacityvision.com

07/10/2026

Did you know smoke charts started as a tool for running coal furnaces?

Ringelmann developed a chart for comparing black smoke. Operators held its shades up against the smoke to judge how well a furnace was burning, then adjusted the fuel and air. Cities later used those same shades to write limits on how dark smoke could be.

Today, certified observers read opacity in 5% steps under EPA Method 9.

Preparing for Method 9 certification? Practice estimating smoke opacity with Opacity Vision VR.
https://opacityvision.com

Source: EPA Visible Emissions Field Manual

06/10/2026

Start your Method 9 lecture online from your phone, tablet or computer. Study from your own workspace, then move on to VR practice and testing.

Get started: https://opaquesmokeschool.com/opacity-vision-vr

05/10/2026

Cities were regulating smoke decades before the EPA existed.

In 1916, a laundry company's dispute over smoke rules reached the U.S. Supreme Court. Northwestern Laundry argued that changing its furnace equipment would cost money. The Court sided with Des Moines: that expense wasn't enough to overturn the city's rules on dense smoke.

Preparing for Method 9 certification? Practice estimating smoke opacity with Opacity Vision VR.

https://opacityvision.com

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