Section 11-58.1-14 - Municipal solid waste landfills - design criteria(a) The design of new MSWLF units and lateral expansions shall be approved by the director before commencement of construction.(b) The design shall either: (1) Ensure that the concentration values listed in Table 1, which is incorporated by reference, or Hawaii Administrative Rules, title 11, chapter 20, whichever is more stringent, will not be exceeded in the uppermost aquifer at the relevant point of compliance, as specified by the director under subsection (e); or(2) Include a composite liner as described in subsection (c) and a leachate collection system that is designed and constructed to maintain less than a thirty-centimeter depth of leachate over the liner.(c) A composite liner shall consist of two components: (1) An upper component that must consist of a minimum 30-mil flexible membrane liner (FML) with a hydraulic conductivity of 1 x 10-7 cm/sec. (FML components consisting of High Density Polyethylene (HDPE) shall be at least 60-mil thick. The FML component must be installed in direct and uniform contact with the compacted soil component.)(2) A lower component that must consist of at least a two-foot layer of compacted soil with a hydraulic conductivity of no more than 1 x 10-7 cm/sec.(d) When approving a design that complies with subsection (b) (1) , the director shall consider at least the following factors: (1) The hydrogeologic characteristics of the facility and surrounding land;(2) The climatic factors of the area; and(3) The volume and physical and chemical characteristics of the leachate.(e) The relevant point of compliance specified by the director shall be no more than one hundred fifty meters from the waste management unit boundary and shall be located on land owned by the owner of the MSWLF unit. In determining the relevant point of compliance, the director shall consider at least the following factors: (1) The hydrogeologic characteristics of the facility and surrounding land;(2) The volume and physical and chemical characteristics of the leachate;(3) The quantity, quality, and direction of flow of ground water;(4) The proximity and withdrawal rate of the ground-water users;(5) The availability of alternative drinking water supplies;(6) The existing quality of the ground water, including other sources of contamination and their cumulative impacts on the ground water and whether ground water is currently used or reasonably expected to be used for drinking water;(7) Public health, safety, and welfare effects; and(8) Practicable capability of the owner or operator.Haw. Code R. § 11-58.1-14
[Eff JAN 13 1994] (Auth: HRS §§ 342H-53, 342H-55)