['Air Programs']
['Hazardous Air Pollutants']
12/23/2024
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...
As required in §63.7790(a), you must comply with each applicable emission and opacity limit in the following table:
| For . . . | You must comply with each of the following . . . |
|---|---|
| 1 This limit applies if the cooler is vented to the same control device as the discharge end. | |
| 2 This concentration limit (gr/dscf) for a control device does not apply to discharges inside a building or structure housing the discharge end at an existing sinter plant, inside a casthouse at an existing blast furnace, or inside an existing BOPF shop if the control device was installed before August 30, 2005. | |
| 3 This limit applies to control devices operated in parallel for a single BOPF during the oxygen blow. | |
| 1. Each windbox exhaust stream at an existing sinter plant | You must not cause to be discharged to the atmosphere any gases that contain particulate matter in excess of 0.4 lb/ton of product sinter. |
| 2. Each windbox exhaust stream at a new sinter plant | You must not cause to be discharged to the atmosphere any gases that contain particulate matter in excess of 0.3 lb/ton of product sinter. |
| 3. Each discharge end at an existing sinter plant | a. You must not cause to be discharged to the atmosphere any gases that exit from one or more control devices that contain, on a flow-weighted basis, particulate matter in excess of 0.02 gr/dscf ; and |
| b. You must not cause to be discharged to the atmosphere any secondary emissions that exit any opening in the building or structure housing the discharge end that exhibit opacity greater than 20 percent (6-minute average). | |
| 4. Each discharge end at a new sinter plant | a. You must not cause to be discharged to the atmosphere any gases that exit from one or more control devices that contain, on a flow weighted basis, particulate matter in excess of 0.01 gr/dscf; and |
| b. You must not cause to be discharged to the atmosphere any secondary emissions that exit any opening in the building or structure housing the discharge end that exhibit opacity greater than 10 percent (6-minute average). | |
| 5. Each sinter cooler at an existing sinter plant | You must not cause to be discharged to the atmosphere any emissions that exhibit opacity greater than 10 percent (6-minute average). |
| 6. Each sinter cooler at a new sinter plant | You must not cause to be discharged to the atmosphere any gases that contain particulate matter in excess of 0.01 gr/dscf. |
| 7. Each casthouse at an existing blast furnace | a. You must not cause to be discharged to the atmosphere any gases that exit from a control device that contain particulate matter in excess of 0.01 gr/dscf 2; and |
| b. You must not cause to be discharged to the atmosphere any secondary emissions that exit all openings in the casthouse or structure housing the blast furnace that exhibit opacity greater than 20 percent (6-minute average). | |
| 8. Each casthouse at a new blast furnace | a. You must not cause to be discharged to the atmosphere any gases that exit from a control device that contain particulate matter in excess of 0.003 gr/dscf; and |
| b. You must not cause to be discharged to the atmosphere any secondary emissions that exit all openings in the casthouse or structure housing the blast furnace that exhibit opacity greater than 15 percent (6-minute average). | |
| 9. Each BOPF at a new or existing shop | a. You must not cause to be discharged to the atmosphere any gases that exit from a primary emission control system for a BOPF with a closed hood system at a new or existing BOPF shop that contain, on a flow-weighted basis, particulate matter in excess of 0.03 gr/dscf during the primary oxygen blow ; and |
| b. You must not cause to be discharged to the atmosphere any gases that exit from a primary emission control system for a BOPF with an open hood system that contain, on a flow-weighted basis, particulate matter in excess of 0.02 gr/dscf during the steel production cycle for an existing BOPF shop or 0.01 gr/dscf during the steel production cycle for a new BOPF shop 3; and | |
| c. You must not cause to be discharged to the atmosphere any gases that exit from a control device used solely for the collection of secondary emissions from the BOPF that contain particulate matter in excess of 0.01 gr/dscf for an existing BOPF shop 2 or 0.0052 gr/dscf for a new BOPF shop. | |
| 10. Each hot metal transfer, skimming, and desulfurization operation at a new or existing BOPF shop | You must not cause to be discharged to the atmosphere any gases that exit from a control device that contain particulate matter in excess of 0.01 gr/dscf for an existing BOPF shop 2 or 0.003 gr/dscf for a new BOPF shop. |
| 11. Each ladle metallurgy operation at a new or existing BOPF shop | You must not cause to be discharged to the atmosphere any gases that exit from a control device that contain particulate matter in excess of 0.01 gr/dscf for an existing BOPF shop 2 or 0.004 gr/dscf for a new BOPF shop. |
| 12. Each existing BOPF shop | You must not cause to be discharged to the atmosphere any secondary emissions that exit any opening in the BOPF shop or any other building housing the BOPF or BOPF shop operation that exhibit opacity greater than 20 percent (3-minute average). |
| 13. Each new BOPF shop | a. You must not cause to be discharged to the atmosphere any secondary emissions that exit any opening in the BOPF shop or other building housing a bottom-blown BOPF or BOPF shop operations that exhibit opacity (for any set of 6-minute averages) greater than 10 percent, except that one 6-minute period not to exceed 20 percent may occur once per steel production cycle; or |
| b. You must not cause to be discharged to the atmosphere any secondary emissions that exit any opening in the BOPF shop or other building housing a top-blown BOPF or BOPF shop operations that exhibit opacity (for any set of 3-minute averages) greater than 10 percent, except that one 3-minute period greater than 10 percent but less than 20 percent may occur once per steel production cycle. | |
| 14. Each BOPF Group at an existing BOPF shop | You must not cause to be discharged to the atmosphere any gases that exit from the collection of BOPF Group control devices that contain mercury in excess of 0.00026 lb/ton of steel scrap input to the BOPF. |
| 15. Each BOPF Group at a new BOPF shop | You must not cause to be discharged to the atmosphere any gases that exit from the collection of BOPF Group control devices that contain mercury in excess of 0.000081 lb/ton of steel scrap input to the BOPF. |
[68 FR 27663, May 20, 2003, as amended at 71 FR 39588, July 13, 2006; 85 FR 42125, July 13, 2020; 89 FR 23329, April 3, 2024]
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