Mercury Emission Limits for Indurating Furnaces

Table 2 to Subpart RRRRR of Part 63—Mercury Emission Limits for Indurating Furnaces [As required in § 63.9590(a), you must comply with each applicable mercury emission limit in the following table:] For . . . You must meet the following emission limits . . . 1. Indurating furnaces constructed or reconstructed before May 15, 2023 Either: (1) Mercury emissions from each furnace must not exceed 1.4 × 10 −5 lb/LT of taconite pellets produced, or (2) Production-weighted average mercury emissions for a group of indurating furnaces, calculated according to Equation 6 in § 63.9634(m)(3), must not exceed 1.3 × 10 −5 lb/LT. 2. Indurating furnaces constructed or reconstructed on or after May 15, 2023 Mercury emissions from each furnace must not exceed 2.6 × 10 −6 lb/LT. [89 FR 16438, Mar. 6, 2024]