- Table 1 to Subpart HHHHH of Part 63—Emission Limits and Work Practice Standards for Process Vessels
Table 1 to Subpart HHHHH of Part 63—Emission Limits and Work Practice Standards for Process Vessels
[As required in § 63.8005, you must meet each emission limit and work practice standard in the following table that applies to your process vessels.]
| For each . . . | You must . . . | And you must . . . | 1. Portable process vessel at an existing source | a. Equip the vessel with a cover or lid that must be in place at all times when the vessel contains a HAP, except for material additions and sampling | Nonapplicable. | 2. Stationary process vessel at an existing source | a. Equip the vessel with a cover or lid that must be in place at all times when the vessel contains a HAP, except for material additions and sampling; or
b. Equip the vessel with a tightly fitting vented cover or lid that must be closed at all times when the vessel contains HAP, except for material additions and sampling c. As specified in § 63.8005(i), on or before February 22, 2024, during the addition of dry material, route material containing metal HAP to a capture and control system that is maintained and operated according to the provisions of § 63.8005 | i. Considering both capture and any combination of control (except a flare), reduce emissions of organic HAP with a vapor existing pressure ≥0.6 kPa by ≥75 percent by weight, and reduce emissions of organic HAP with a vapor pressure <0.6 kPa by ≥60 percent by weight.
i. Reduce emissions of organic HAP with a vapor pressure ≥0.6 kPa by ≥75 percent by weight, and reduce emissions of organic HAP with a vapor pressure <0.6 kPa by ≥60 percent by weight, by venting emissions through a closed-vent system to any combination of control devices (except a flare); or | ii. Reduce emissions of total organic HAP by venting emissions from a non-halogenated vent stream through a closed-vent system to a flare; or | iii. Reduce emissions of total organic HAP by venting emissions through a closed-vent system to a condenser that reduces the outlet gas temperature to: | <10 °C if the process vessel contains HAP with a partial pressure <0.6 kPa, or | <2 °C if the process vessel contains HAP with a partial pressure ≥0.6 kPa and <17.2 kPa, or | <−5 °C if the process vessel contains HAP with a partial pressure ≥17.2 kPa. | i. Reduce emissions of material containing metal HAP to 0.014 gr/dscf or less. | 3. Portable and stationary process vessel at a new source | a. Equip the vessel with a tightly fitting vented cover or lid that must be closed at all times when the vessel contains HAP, except for material additions and sampling
b. As specified in § 63.8005(i), upon startup or February 22, 2023, whichever is later, during the addition of dry material, route material containing metal HAP to a capture and control system that is maintained and operated according to the provisions of § 63.8005 | i. Reduce emissions of total organic HAP by ≥95 percent by weight by venting emissions through a closed-vent system to any combination of control devices (except a flare); or
ii. Reduce emissions of total organic HAP by venting emissions from a non-halogenated vent stream through a closed-vent system to a flare; or iii. Reduce emissions of total organic HAP by venting emissions through a closed-vent system to a condenser that reduces the outlet gas temperature to: | <−4 °C if the process vessel contains HAP with a partial pressure <0.7 kPa, or | <−20 °C if the process vessel contains HAP with a partial pressure ≥0.7 kPa and <17.2 kPa, or | <−30 °C if the process vessel contains HAP with a partial pressure ≥17.2 kPa. | i. Reduce emissions of material containing metal HAP to 0.0079 gr/dscf or less. | 4. Halogenated vent stream from a process vessel subject to the requirements of item 2 or 3 of this table for which you use a combustion control device to control organic HAP emissions | a. Use a halogen reduction device after the combustion control device; or
b. Use a halogen reduction device before the combustion control device | i. Reduce overall emissions of hydrogen halide and halogen HAP by ≥95 percent; or
ii. Reduce overall emissions of hydrogen halide and halogen HAP to ≤0.45 kilogram per hour (kg/hr). Reduce the halogen atom mass emission rate to ≤0.45 kg/hr. |
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