(a) The coal refuse disposal area shall be
constructed in compliance with this section and §§
90.122 and
90.124 (relating to coal refuse
disposal; and coal refuse disposal: site inspection), except to the extent the
requirements of those sections are specifically varied in this
section.
(b) The coal refuse shall
be:
(1) Spread in horizontal layers no more
than 24 inches in thickness.
(2)
Compacted to attain a minimum of 90% of the maximum dry density as determined
by the Modified Proctor Test or 95% of the maximum dry density as determined by
the Standard Proctor Test.
(c) Concurrently with construction of the
site as each portion of the site is developed and reaches final configuration
and elevation, that portion of the site shall be covered with a final layer of
nontoxic, noncombustible material and soil suitable for revegetation within 60
days and revegetated under §§
90.151-
90.157,
90.159 and
90.160. The minimum combined
thickness of the nontoxic, noncombustible material and soil shall be 4 feet
except that this requirement may be waived for coal refuse disposal areas
permitted prior to July 27, 1991 if the requirements of §§
90.150-
90.157,
90.159-
90.165 can be attained; or when
the permittee has demonstrated that a lesser combined thickness is as effective
as 4 feet of combined thickness in meeting the performance standards of this
chapter.
(d) The Department may
approve other compaction requirements if the requirements of §
90.122 are
met.
Notes
The
provisions of this § 90.125 adopted December 19, 1980, 10 Pa.B. 4789,
effective 7/31/1982, 12 Pa.B.
2382; amended July 30, 1982, 12 Pa.B. 2473, effective
7/31/1982, 12 Pa.B. 2382;
amended February 17, 1984, 14 Pa.B. 524, effective
8/4/1984, 14 Pa.B. 2860; amended
June 15, 1990, 20 Pa.B. 3383, effective 7/27/1991, 21 Pa.B.
3316.
This section cited in 25 Pa. Code §
90.3 (relating to general
requirements: permit); 25 Pa. Code §
90.39 (relating to ponds,
impoundments, banks, dams, embankments, piles and fills); 25 Pa. Code §
90.91 (relating to requirements);
25 Pa. Code §
90.128 (relating to coal refuse
disposal: active surface mines); 25 Pa. Code §
90.129 (relating to coal refuse
disposal: abandoned unreclaimed surface mines); and 25 Pa. Code §
90.130 (relating to coal refuse
dams).
