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| If the construction/reconstruction date is | Then the owner or operator must comply with | And the owner or operator must achieve compliance | Group 1 POTW: | (1) After December 27, 2016 | (i) New source requirements in §§ 63.1583(b); 63.1586(b) or (c); and 63.1588 through 63.1591 | Upon initial startup. | (2) After December 1, 1998 but on or before December 27, 2016 | (i) New source requirements in § 63.1583(b) but instead of complying with both requirements (industrial user(s) NESHAP and the POTW standards in §§ 63.1586(b) or (c)), you must comply with the most stringent requirement 1 | Upon initial startup through October 26, 2020. | (ii) New source requirements in §§ 63.1586(b) or (c); and 63.1588 through 63.1591 | On or before October 26, 2020. | (3) On or before December 1, 1998 | (i) Existing source requirements in §§ 63.1583(a) | By the compliance date specified in the other applicable NESHAP. | (ii) Existing source requirements in §§ 63.1588 through 63.1591 | On or before October 26, 2018. | Group 2 POTW: | (4) After December 27, 2016 | (i) New source requirements in §§ 63.1586(b) or (c); and 63.1588 through 63.1591 | Upon initial startup. | (5) After December 1, 1998 but on or before December 27, 2016 | (i) New source requirements in § 63.1586(b) or (c) 1 | Upon initial startup through October 26, 2020. | (ii) New source requirements in §§ 63.1586(b) or (c); and 63.1588 through 63.1591 | On or before October 26, 2020. | (6) On or before December 1, 1998 | (i) Existing source requirements in §§ 63.1586(a); and 63.1591(a) | On or before October 26, 2018. |
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1 Note: This represents the new source requirements in the original 1999 NESHAP, which are applicable until October 26, 2020. Between October 26, 2017 and October 26, 2020, you must transition to the new requirements in Table 2 (2)(ii) and (5)(ii) for Group 1 and Group 2 POTW, respectively.