Section 62.601 - Identification of sources(a) The plan applies to all existing municipal solid waste landfills for which construction, reconstruction, or modification was commenced before May 30, 1991, as described in 40 CFR part 60, subpart Cc.(b) The plan in § 62.600(b) applies to all existing municipal solid waste landfills under the jurisdiction of the Arizona Department of Environmental Quality for which construction, reconstruction, or modification was commenced on or before July 17, 2014.85 FR 45329, July 28, 2020 85 FR 9390, 2/19/2020; 85 FR 45329, 8/27/2020