Haw. Code R. § 11-264-310 - Closure and post-closure care

(a) At final closure of the landfill or upon closure of any cell, the owner or operator must cover the landfill or cell with a final cover designed and constructed to:

(1) Provide long-term minimization of migration of liquids through the closed landfill;

(2) Function with minimum maintenance;

(3) Promote drainage and minimize erosion or abrasion of the cover;

(4) Accommodate settling and subsidence so that the cover's integrity is maintained; and

(5) Have a permeability less than or equal to the permeability of any bottom liner system or natural subsoils present.

(b) After final closure, the owner or operator must comply with all post-closure requirements contained in sections 11-264-117 through 11-264-120, including maintenance and monitoring throughout the post-closure care period (specified in the permit under section 11-264-117). The owner or operator must:

(1) Maintain the integrity and effectiveness of the final cover, including making repairs to the cap as necessary to correct the effects of settling, subsidence, erosion, or other events;

(2) Continue to operate the leachate collection and removal system until leachate is no longer detected;

(3) Maintain and monitor the leak detection system in accordance with subparagraph 11-264-301(c)(3)(iv) and paragraph 11-264-301(c) (4) and subsection 11-264-303(c), and comply with all other applicable leak detection system requirements of this chapter;

(4) Maintain and monitor the ground-water monitoring system and comply with all other applicable requirements of subchapter F;

(5) Prevent run-on and run-off from eroding or otherwise damaging the final cover; and

(6) Protect and maintain surveyed benchmarks used in complying with section 11-264-309.

Notes

Haw. Code R. § 11-264-310

[Eff 6/18/94; comp] (Auth: HRS §§ 342J-4, 342J-31, 342J-34, 342J-35) (Imp: 40 C.F.R. §264.310)