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Method 203C Visual Determination of Opacity of Emissions from Stationary Sources for Instantaneous Regulations 8-4-2017 (PDF)(3 pp, 356 K)
Promulgated CFR Test Method 203C Visual Determination of Opacity of Emissions from Stationary Sources for Instantaneous Regulations.
- Frequently Asked Questions (FAQs) for Method 203C (PDF)(1 pg, 178 K, August 2016)