CFR › Title 40 › Part 264 › §264.30940 CFR §264.309Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkThe owner or operator of a landfill must maintain the following items in the operating record required under § 264.73:(a)On a map, the exact location and dimensions, including depth, of each cell with respect to permanently surveyed benchmarks; and(b)The contents of each cell and the approximate location of each hazardous waste type within each cell.