| For . . .
| You must . . .
| According to one of the following requirements . . .
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| 1. Each basket or container that is used for holding fired refractory shapes in an existing shape preheater and autoclave during the pitch impregnation process | a. Control POM emissions from any affected shape preheater | i. At least every 10 preheating cycles, clean the residual pitch from the surfaces of the basket or container by abrasive blasting prior to placing the basket or container in the affected shape preheater; or
ii. At least every 10 preheating cycles, subject the basket or container to a thermal process cycle that meets or exceeds the operating temperature and cycle time of the affected preheater, AND is conducted in a process unit that is exhausted to a thermal or catalytic oxidizer that is comparable to the control device used on an affected defumer or coking oven; or
iii. Capture emissions from the affected shape preheater and vent them to the control device that is used to control emissions from an affected defumer or coking oven, or to a comparable thermal or catalytic oxidizer.
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| 2. Each new or existing pitch working tank | Control POM emissions | Capture emissions from the affected pitch working tank and vent them to the control device that is used to control emissions from an affected defumer or coking oven, OR to a comparable thermal or catalytic oxidizer.
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| 3. Each new or existing chromium refractory products kiln | Minimize fuel-based HAP emissions | Before May 19, 2022, use natural gas, or equivalent, as the kiln fuel, except during periods of natural gas curtailment or supply interruption, as defined in § 63.9824. On and after May 19, 2022, use natural gas, or equivalent, as the kiln fuel at all times.
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| 4. Each existing clay refractory products kiln | Minimize fuel-based HAP emissions | Before May 19, 2022, use natural gas, or equivalent, as the kiln fuel, except during periods of natural gas curtailment or supply interruption, as defined in § 63.9824. On and after May 19, 2022, use natural gas, or equivalent, as the kiln fuel at all times.
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| 5. Each affected continuous kiln used to manufacture refractory products that use organic HAP that is equipped with an emission control device for THC with Administrator approval to take the control device out of service for scheduled maintenance, as specified in § 63.9792(e) | Minimize HAP emissions | i. Before May 19, 2022, minimize HAP emissions from the affected kiln during all periods of scheduled maintenance of the kiln control device when the kiln is operating and the control device is out of service consistent with your OM&M plan and minimize the time period during which the kiln is operating and the control device is out of service; or
ii. On and after May 19, 2022, minimize HAP emissions during the period when the kiln is operating and the control device is out of service by maintaining the organic HAP processing rate (lb/hr) below the average organic HAP processing rate based on actual production on a 6-month rolling basis (not to include periods of kiln shut down) or below the organic HAP processing rate (lb/hr) that coincides with the lowest hour of the most recent 3-hour performance test, whichever is lower); and minimize the time period during which the kiln is operating and the control device is out of service, not to exceed 750 hours for the year (on a 12-month rolling basis).
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| 6. Each new or existing curing oven, shape dryer, and kiln that is used to process refractory products that use organic HAP, on and after Novermber 19, 2021 | Minimize fuel-based HAP emissions | Use natural gas, or equivalent, as the kiln fuel, at all times. |