Current through Register Vol. 54, No. 44, November 2, 2024
(a)
General. The secondary liner shall meet the following
requirements:
(1) The secondary liner shall
prevent the migration of leachate through the liner to the greatest degree that
is technologically possible.
(2)
The effectiveness of the secondary 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 secondary liner
shall be resistant to physical failure, chemical failure and other failure from
the sources identified under §
288.412(d)
(relating to liner system and leachate control plan).
(4) The secondary 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 secondary liner shall meet, at the minimum, the
requirements of Appendix A, Table I (relating to minimum liner design
standards).
(c)
Requirements. A secondary liner shall:
(1) Be no more permeable than 1.0 x
10-7 cm/sec. based on laboratory testing. For
nonsynthetic liners, field testing shall also be conducted.
(2) Be installed, if the liner is synthetic,
according to manufacturer's specifications under the supervision of an
authorized representative of the manufacturer. An approved quality assurance
and quality control plan shall be implemented in the field during the
installation of the liner.
(3) Be
designed, installed and maintained, if the liners are remolded clay, according
to a quality assurance and quality control plan approved by the Department for
remolded clay liners.
(4) Be
inspected for uniformity, damage and imperfections during construction and
installation.
(d)
Compacted lifts. Secondary 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.
(e)
Composite
secondary liner.
(1) If the operator
does not design, construct, operate and maintain a composite primary liner, the
operator shall design, construct, operate and maintain a composite secondary
liner which has the following components:
(i)
An upper component made of a manufactured geosynthetic liner that meets the
requirements of this section independently of the composite
component.
(ii) A composite
component made of earthen material that meets the requirements of this section
independently of the upper component, except that the composite component shall
be no more permeable than 1.0 x 10-6 cm/sec. based
on laboratory and field testing.
(2) The two components of the composite liner
shall be designed, constructed and maintained to provide a compression
connection, or direct continuous contact, between them.
(3) The use of a composite secondary liner
does not relieve the operator of responsibility for a separate primary liner
under §
288.436 (relating to primary
liner).
(f)
Natural attenuation of leachate prohibited. A facility or a
component thereof that is subject to this section may not have a secondary
liner based upon natural attenuation of leachate.
This section cited in 25 Pa. Code §
287.114 (relating to interim
operational requirements for unpermitted processing or disposal facilities); 25
Pa. Code §
287.116 (relating to interim
operational requirements); 25 Pa. Code §
288.412 (relating to liner system
and leachate control plan); 25 Pa. Code §
288.421 (relating to basic
limitations); 25 Pa. Code §
288.431 (relating to scope and
requirements); and 25 Pa. Code §
288.436 (relating to primary
liner).
