For . . .
| You must demonstrate continuous compliance by . . .
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1. Each windbox exhaust stream at an existing sinter plant | a. Maintaining emissions of particulate matter at or below 0.4 lb/ton of product sinter; and
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| b. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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2. Each windbox exhaust stream at a new sinter plant | a. Maintaining emissions of particulate matter at or below 0.3 lb/ton of product sinter; and
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| b. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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3. Each discharge end at an existing sinter plant | a. Maintaining emissions of particulate matter from one or more control devices at or below 0.02 gr/dscf; and
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| b. Maintaining the opacity of secondary emissions that exit any opening in the building or structure housing the discharge end at or below 20 percent (6-minute average); and
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| c. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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4. Each discharge end at a new sinter plant | a. Maintaining emissions of particulate matter from one or more control devices at or below 0.01 gr/dscf; and
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| b. Maintaining the opacity of secondary emissions that exit any opening in the building or structure housing the discharge end at or below 10 percent (6-minute average); and
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| c. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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5. Each sinter cooler at an existing sinter plant | a. Maintaining the opacity of emissions that exit any sinter cooler at or below 10 percent (6-minute average); and
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| b. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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6. Each sinter cooler at a new sinter plant | a. Maintaining emissions of particulate matter at or below 0.1 gr/dscf; and
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| b. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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7. Each casthouse at an existing blast furnace | a. Maintaining emissions of particulate matter from a control device at or below 0.01 gr/dscf; and
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| b. Maintaining the opacity of secondary emissions that exit all openings in the casthouse or structure housing the casthouse at or below 20 percent (6-minute average); and
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| c. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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8. Each casthouse at a new blast furnace | a. Maintaining emissions of particulate matter from a control device at or below 0.003 gr/dscf; and
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| b. Maintaining the opacity of secondary emissions that exit all openings in the casthouse or structure housing the casthouse at or below 15 percent (6-minute average); and
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| c. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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9. Each BOPF at a new or existing BOPF shop | a. Maintaining emissions of particulate matter from the primary control system for a BOPF with a closed hood system at or below 0.03 gr/dscf; and
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| b. Maintaining emissions of particulate matter from the primary control system for a BOPF with an open hood system at or below 0.02 gr/dscf for an existing BOPF shop or 0.01 gr/dscf for a new BOPF shop; and
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| c. Maintaining emissions of particulate matter from a control device applied solely to secondary emissions from a BOPF at or below 0.01 gr/dscf for an existing BOPF shop or 0.0052 gr/dscf for a new BOPF shop; and
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| d. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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10. Each hot metal transfer, skimming, and desulfurization operation at a new or existing BOPF shop | a. Maintaining emissions of particulate matter from a control device at or below 0.01 gr/dscf at an existing BOPF or 0.003 gr/dscf for a new BOPF; and
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| b. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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11. Each ladle metallurgy operation at a new or existing BOPF shop | a. Maintaining emissions of particulate matter from a control device at or below 0.01 gr/dscf at an existing BOPF shop or 0.004 gr/dscf for a new BOPF shop; and
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| b. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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12. Each existing BOPF shop | a. Maintaining the opacity of secondary emissions that exit any opening in the BOPF shop or other building housing the BOPF shop or shop operation at or below 20 percent (3-minute average); and
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| b. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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13. Each new BOPF shop | a. Maintaining the opacity (for any set of 6-minute averages) of secondary emissions that exit any opening in the BOPF shop or other building housing a bottom-blown BOPF or shop operation at or below 10 percent, except that one 6-minute period greater than 10 percent but no more than 20 percent may occur once per steel production cycle; and
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| b. Maintaining the opacity (for any set of 3-minute averages) of secondary emissions that exit any opening in the BOPF shop or other building housing a top-blown BOPF or shop operation at or below 10 percent, except that one 3-minute period greater than 10 percent but less than 20 percent may occur once per steel production cycle; and
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| c. Conducting subsequent performance tests at the frequencies specified in § 63.7821.
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14. Each BOPF Group at an existing BOPF shop | a. Maintaining emissions of mercury from the collection of BOPF Group control devices at or below 0.00026 lb/ton steel scrap input to the BOPF; and
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| b. If demonstrating compliance through performance testing, conducting subsequent performance tests at the frequencies specified in § 63.7821; and
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| c. If demonstrating compliance through § 63.7791(c), (d), or (e), maintaining records pursuant to § 63.7842(e).
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15. Each BOPF Group at a new BOPF shop | a. Maintaining emissions of mercury from the collection of BOPF Group control devices at or below 0.000081 lb/ton steel scrap input to the BOPF; and
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| b. If demonstrating compliance through performance testing, conducting subsequent performance tests at the frequencies specified in § 63.7821; and
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| c. If demonstrating compliance through § 63.7791(c), (d), or (e), maintaining records pursuant to § 63.7842(e). |