(a)
Standards of performance. The liner shall meet the following
standards of performance:
(1) The liner shall
prevent the migration of leachate through the liner to the greatest degree that
is technologically possible.
(2)
The effectiveness of the liner in preventing the migration of leachate may not
be adversely affected by the physical or chemical characteristics of solid
waste, solid waste constituents or leachate from the facility.
(3) The liner shall be resistant to physical
failure, chemical failure, and other failure from the sources identified under
§
289.512(d)
(relating to liner system and leachate control plan).
(4) The liner shall cover the bottom and
sidewalls of the facility.
(b)
Alternative design
requirements. Unless alternative design requirements to meet the
performance standards in subsection (a) are approved as part of the permit
under §
287.231 (relating to equivalency
review procedure), the liner shall meet, at the minimum, the requirements of
Appendix A, Table II (relating to minimum liner design standards).
(c)
Requirements. A liner
shall meet the following standards. A liner shall include:
(1) An upper component made of a manufactured
geosynthetic liner that meets the following requirements independently of the
composite component:
(i) The upper component
is no more permeable than 1.0 x 10-7 cm/sec. based
on laboratory testing.
(ii) The
upper component is installed according to manufacturer's specifications under
the supervision of an authorized representative of the manufacturer. An
approved assurance and quality control program shall be implemented in the
field during the installation of the liner.
(iii) The upper component is inspected for
uniformity, damage and imperfections during construction and
installation.
(2) A
composite component made of earthen material that meets the following
requirements independent of the upper component:
(i) The composite component is no more
permeable than 1.0 x 10-6 cm/sec., based on
laboratory testing and field testing.
(ii) The composite component is designed,
installed and maintained according to a quality assurance and quality control
plan approved by the Department.
(iii) The composite component is inspected
for uniformity, damage and imperfections during construction and
installation.
(iv) The composite
component shall be constructed in compacted lifts not exceeding 6 inches in
depth. A lift shall be scarified before placement of the next lift.
(3) The two components of the
composite liner shall be designed, constructed and maintained to provide a
compression connection, or direct continuous contact, between them.
(d)
Compacted
lifts. Liners made of clay, bentonite and bentonite-like materials
shall be constructed in compacted lifts not exceeding 6 inches in depth. A lift
shall be scarified before placement of the next lift.