Do you have questions about a Test Method, Performance Specification or Source Category? Find the EMC contact for your question in the EMC Directory.

Supporting Information

You will need Adobe Reader to view the files on this page. See EPA’s About PDF page to learn more.

• Visible Emissions Field Manual (PDF)
• Visible Emissions Evaluation Procedures Course (PDF)
• Collaborative Study (PDF)
• Optical Properties and Visual Effects of Smoke Stack Plumes (PDF)
• Section 3.12 of the QA Handbook, Volume III (PDF)
• Visible Emissions Certification Program Evaluation Form (PDF)
• Self-Audit Guide for Visible Emissions Certification Programs (PDF)
• Quality Assurance Guideline for Visible Emissions Training (PDF)
• Smoke Generator Troubleshooting (PDF)
• Guidelines for Evaluation of Visible Emissions (PDF)
• Guidelines for Quality Assurance Program for Visible Emissions (PDF)
• Visible Emissions Program Operations Manual (PDF)
• Instructions for Visible Emissions Observation Form (PDF)

Method and FAQ

• Method 9 Visual determination of the opacity of emissions from stationary sources (PDF)(8 pp, 337 K)
• Frequently Asked Questions (FAQs) for Method 9 (PDF)(1 pg, 146 K, August 2016)