Chapter 117 NOx Guidance and Methods

Last updated 10/3/2007

The documents and links below contain guidance and methods that may be useful tools for compliance with the rules relating to oxides of nitrogen (NOx) rules in 30 TAC Chapter 117 . Please note that the information and guidance provided on this Web page is for reference purposes only and is not a substitute for the rules.

• Guidance
• Methods

Many of the documents linked from this page are in Portable Document Format (PDF). (Help with PDF.)

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Chapter 117–Related Guidance Documents

• Houston Compliance Schedule for CEMS & Stack Testing for Units Placed into Service Before 03/31/05
• TNRCC PEMS Protocol Draft, May 16, 1994: The TNRCC draft guidance document referenced in 30 TAC Chapter 117, Section 117.8100(b) for Predictive Emission Monitoring Systems (PDF)
• Guidance for Preparation of Summary, Excess Emission, and Continuous Monitoring Systems Reports: Referenced in 30 TAC Chapter 117, Section 117.145, 117.245, and other recordkeeping and reporting sections. (PDF)
• List of Emission Testing Firms 
• Summary of the Texas Boiler Rules (Currently being updated)
• Draft Guidance Document for Recordkeeping Requirements of §117.2035(a)(2)(E), Independent School Districts (July 26, 2005) (PDF)

• Derivation/disposition tables for Chapter 117
• Derivation Table (PDF)
• Disposition Table (PDF)

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Chapter 117–Related Methods

• EPA Test Methods from 40 CFR 51, 60, 61, and 63 (e.g., Test Methods 1–4, 7E, 10, etc.). 
• EPA Performance Specifications from 40 CFR 60 Appendix B for Continuous Emission Monitoring Systems and 40 CFR 60 Appendix F (CEMS Quality Assurance Procedures) 
• American Society for Testing and Materials (ASTM) Standards 

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