Figure: 30 TAC §113.2174(f)

Table 6. Requirements for Validating Continuous Emission Monitoring Systems (CEMS)
Continuous Emission Monitoring Systems	Method in 40 CFR Part 60, Appendix A to Validate Pollutant Concentration Levels	Method in 40 CFR Part 60, Appendix A to Measure Oxygen (or Carbon Dioxide)
1. Nitrogen Oxides (Class I units only)^a	Method 7, 7A, 7B, 7C, 7D, or 7E	Method 3 or 3A
2. Sulfur Dioxide	Method 6 or 6C	Method 3 or 3A
3. Carbon Monoxide	Method 10, 10A, or 10B	Method 3 or 3A

^aClass I units mean small municipal waste combustion units subject to this division that are located at municipal waste combustion plants with an aggregate plant combustion capacity greater than 250 tons per day of municipal solid waste. See §113.2100 of this title for definitions.