1. (a) Except as provided by Env-Sw 805.15 and subject to (b) below, landfills receiving construction and demolition debris only or coal ash only may be designed as single-lined facilities pursuant to the requirements of Env-Sw 805.05 and the liner shall be a composite liner pursuant to Env-Sw 805.04(c) and, as applicable, Env-Sw 805.05(k).
2. (b) If, based on an evaluation of the facility’s proposed operating plan and identification of the specific type or source of the wastes, the characteristics of the wastes cannot be consistently determined or assured or the characteristics pose a threat to groundwater quality, the facility shall be a double-lined facility pursuant to Env-Sw 805.05 and one of the liners shall be a composite liner pursuant to Env-Sw 805.04(c) and, as applicable, Env-Sw 805.05(k).
3. (c) Landfills which co-mingle construction and demolition debris with other waste types shall meet the design requirements set forth in this part relative to the other waste types, if the latter are more stringent than the requirements set forth in (a) above.

Source. #5172, eff 7-1-91; ss by #6535, INTERIM, eff 7-1-97, EXPIRES: 10-29-97; ss by #6619-B, eff 10-29-97; (See Revision Note at chapter heading for Env-Sw 800); ss by #8459, eff 10-28-05 (formerly Env-Wm 2505.14); ss by #10597, eff 7-1-14; ss by #14156, eff 12-21-24