['Air Programs']
['Hazardous Air Pollutants']
02/27/2022
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As stated in §63.9321, you must demonstrate initial compliance with each emission limitation that applies to you according to the following table:
| For each new or reconstructed affected source complying with . . . | You must . . . | Using . . . | According to the following requirements . . . |
|---|---|---|---|
| 1. The CO or THC outlet concentration emission limitation | a. Demonstrate CO or THC emissions are 20 ppmvd or less | i. EPA Methods 3A and 10 of appendix A to 40 CFR part 60 for CO measurement or EPA Method 25A of appendix A to 40 CFR part 60 for THC measurement; or | You must demonstrate that the outlet concentration of CO or THC emissions from the test cell/stand or emission control device is 20 ppmvd or less, corrected to 15 percent O2 content, using the average of the test runs in the performance test. |
| ? | ii. A CEMS for CO or THC and O2 at the outlet of the engine test cell/stand or emission control device | This demonstration is conducted immediately following a successful performance evaluation of the CEMS as required in §63.9320 (b). The demonstration consists of the first 4-hour rolling average of measurements. The CO or THC concentration must be corrected to 15 percent O2 content, dry basis using Equation 1 in §63.9320. | |
| 2. The CO or THC percent reduction emission limitation | a. Demonstrate a reduction in CO or THC of 96 percent or more | i. You must conduct an initial performance test to determine the capture and control efficiencies of the equipment and to establish operating limits to be achieved on a continuous basis; or | You must demonstrate that the reduction in CO or THC emissions is at least 96 percent using the first 4-hour rolling average after a successful performance evaluation. Your inlet and outlet measurements must be on a dry basis and corrected to 15 percent O2 content. |
| ii. A CEMS for CO or THC and O2 at both the inlet and outlet of the emission control device | This demonstration is conducted immediately following a successful performance evaluation of the CEMS as required in §63.9320(b). The demonstration consists of the first 4-hour rolling average of measurements. The inlet and outlet CO or THC concentrations must be corrected to 15 percent O2 content using Equation 1 in §63.9320. The reduction in CO or THC is calculated using Equation 2 in §63.9320. |
[85 FR 34348, June 3, 2020]
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