…nd Corrections (Checklist 167C) as amended (Checklist 167C.1) 63 FR 28556 63 FR 31266 May 26, 1998. June 8, 1998. 15. Petroleum Refining Process (Checklist 169) as amended (Checklist 169.1) 63 FR 42110 63 FR 54356 August 6, 1998. October 9, 1998. 16. Land Disposal Restrictions-Ph…