['Air Programs']
['Hazardous Air Pollutants']
12/23/2024
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As stated in §63.9788, you must comply with the emission limits for affected sources in the following table:
| For . . . | You must meet the following emission limits . . . |
|---|---|
| 1. Each new or existing curing oven, shape dryer, and kiln that is used to process refractory products that use organic HAP; each new or existing coking oven and defumer that is used to produce pitch-impregnated refractory products; each new shape preheater that is used to produce pitch-impregnated refractory products; AND each new or existing process unit that is exhausted to a thermal or catalytic oxidizer that also controls emissions from an affected shape preheater or pitch working tank | As specified in items 2 through 9 of this table. |
| 2. Continuous process units that are controlled with a thermal or catalytic oxidizer | a. The 3-hour block average THC concentration must not exceed 20 parts per million by volume, dry basis (ppmvd), corrected to 18 percent oxygen, at the outlet of the control device; or b. The 3-hour block average THC mass emissions rate must be reduced by at least 95 percent. |
| 3. Continuous process units that are equipped with a control device other than a thermal or catalytic oxidizer | a. The 3-hour block average THC concentration must not exceed 20 ppmvd, corrected to 18 percent oxygen, at the outlet of the control device; or b. The 3-hour block average THC mass emissions rate must be reduced by at least 95 percent. |
| 4. Continuous process units that use process changes to reduce organic HAP emissions | The 3-hour block average THC concentration must not exceed 20 ppmvd, corrected to 18 percent oxygen, at the outlet of the process gas stream. |
| 5. Continuous kilns that are not equipped with a control device | The 3-hour block average THC concentration must not exceed 20 ppmvd, corrected to 18 percent oxygen, at the outlet of the process gas stream. |
| 6. Batch process units that are controlled with a thermal or catalytic oxidizer | a. The 2-run block average THC concentration for the 3-hour peak emissions period must not exceed 20 ppmvd, corrected to 18 percent oxygen, at the outlet of the control device; or b. The 2-run block average THC mass emissions rate for the 3-hour peak emissions period must be reduced by at least 95 percent. |
| 7. Batch process units that are equipped with a control device other than a thermal or catalytic oxidizer | a. The 2-run block average THC concentration for the 3-hour peak emissions period must not exceed 20 ppmvd, corrected to 18 percent oxygen, at the outlet of the control device; or b. The 2-run block average THC mass emissions rate for the 3-hour peak emissions period must be reduced by at least 95 percent. |
| 8. Batch process units that use process changes to reduce organic HAP emissions | The 2-run block average THC concentration for the 3-hour peak emissions period must not exceed 20 ppmvd, corrected to 18 percent oxygen, at the outlet of the process gas stream. |
| 9. Batch process kilns that are not equipped with a control device | The 2-run block average THC concentration for the 3-hour peak emissions period must not exceed 20 ppmvd, corrected to 18 percent oxygen, at the outlet of the process gas stream. |
| 10. Each new continuous kiln that is used to produce clay refractory products | a. The 3-hour block average HF emissions must not exceed 0.019 kilograms per megagram (kg/Mg) (0.038 pounds per ton (lb/ton)) of uncalcined clay processed, OR the 3-hour block average HF mass emissions rate must be reduced by at least 90 percent; and b. The 3-hour block average HCl emissions must not exceed 0.091 kg/Mg (0.18 lb/ton) of uncalcined clay processed, OR the 3-hour block average HCl mass emissions rate must be reduced by at least 30 percent; and c. The 3-hour block average PM emissions must not exceed 1.4 kg/Mg (3.1 lb/hr); and d. The 3-hour block average Hg concentration must not exceed 6.1 micrograms per dry standard cubic meter (µg/dscm), corrected to 18 percent oxygen, at the outlet of the control device or the process gas stream. |
| 11. Each new batch process kiln that is used to produce clay refractory products | a. The 2-run block average HF mass emissions rate for the 3-hour peak emissions period must be reduced by at least 90 percent; and b. The 2-run block average HCl mass emissions rate for the 3-hour peak emissions period must be reduced by at least 30 percent; and c. The 2-run block average PM emissions for the 3-hour peak emissions period must not exceed 1.4 kg/Mg (3.1 lb/hr); and d. The 2-run block average Hg concentration for the 3-hour peak emissions period must not exceed 6.1 µg/dscm, corrected to 18 percent oxygen, at the outlet of the control device or the process gas stream. |
| 12. Each existing continuous kiln that is used to produce clay refractory products on and after November 20, 2022 | a. The 3-hour block average PM emissions must not exceed 4.3 kg/Mg (9.5 lb/hr); and b. The 3-hour block average Hg concentration must not exceed 18 µg/dscm, corrected to 18 percent oxygen, at the outlet of the control device or the process gas stream. |
| 13. Each existing batch kiln that is used to produce clay refractory products on and after November 20, 2022 | a. The 2-run block average PM emissions for the 3-hour peak emissions period must not exceed 4.3 kg/Mg (9.5 lb/hr); and b. The 2-run block average Hg concentration for the 3-hour peak emissions period must not exceed 18 µg/dscm, corrected to 18 percent oxygen, at the outlet of the control device or the process gas stream. |
[86 FR 66069, Nov. 19, 2021]
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