Current through August 26, 2024
(1) GENERAL.
Leachate recirculation operations shall comply with the following requirements:
(a) Leachate recirculation distribution
systems may not discharge leachate within 100 lateral feet of the exterior
sideslope final grades, unless otherwise approved by the department in
writing.
(b) Leachate may not be
introduced in areas with less than 20 feet of waste over the leachate
collection system.
(c) Leachate may
not be recirculated in areas that do not have active gas extraction systems
installed. The gas extraction systems shall be operated in accordance with the
approved leachate recirculation plan to control any additional gas generated by
leachate recirculation and minimize release of uncontrolled gas.
(d) Leachate recirculation shall be suspended
upon discovery of warning symptoms, as identified in the approved leachate
recirculation plan. Leachate recirculation may not resume in the area where the
problem occurred until changes are made to the system or the warning symptoms
have declined to acceptable levels. The operator shall notify the department in
writing within 7 days of the discovery of warning symptoms and suspension of
leachate recirculation. Alternative notification procedures may be approved by
the department in writing.
(e)
Leachate recirculation shall be suspended whenever any of the failure
thresholds identified in the approved leachate recirculation plan are exceeded.
Leachate recirculation may not resume until the department has reviewed and
approved changes to the system that will result in meeting the thresholds. The
operator shall notify the department within 3 days of the discovery of
exceeding any failure threshold. Alternative notification procedures may be
approved by the department in writing.
(f) The operation of the gas extraction
system shall be amended as necessary to counteract any increased incidence or
intensity of odors.
(g) The
landfill operator shall maintain in the landfill's written operating record the
liquid mass balance for each leachate drainage basin, including leachate
extracted, leachate recirculated and precipitation, in all areas where leachate
is recirculated, in accordance with the requirements of s.
NR 507.215. All warning symptoms, terminations of
leachate recirculation and other problems and their solutions shall be
recorded.
(h) Leachate may not be
recirculated where daily or intermediate cover consists of low permeability
clay soil or low permeability wastes, unless the daily or intermediate cover is
removed or scarified.
(i) Measures
shall be taken to prevent cold weather freeze up of leachate distribution
equipment if used during the winter months.
(2) SURFACE APPLICATION. Surface application
shall comply with the following requirements in addition to those in sub. (1):
(a) Leachate may not be applied in a manner
that results in ponding of leachate on the surface.
(b) Leachate may not be applied in a manner
that allows runoff of leachate beyond the application area.
(c) Leachate may not be applied using a spray
system or any other distribution system that promotes evaporation of leachate
or volatilization of compounds in leachate. Spray systems such as spray bars on
the back of a tanker truck may be acceptable if the spray is directed
downward.
(d) Leachate application
shall be limited to the active area of the landfill.
(e) Leachate may not be applied during wet or
windy conditions that would prevent containment of the leachate to the
application area.
(f) Truck traffic
shall be routed around the application area until the application area is
covered to prevent tracking of leachate.
(g) Areas of the landfill where leachate has
been applied shall be covered with newly placed waste or soil as soon as
possible, but in no case later than the end of the same working day that
leachate is applied.
(3)
VERTICAL DISTRIBUTION SYSTEMS. Vertical distribution systems shall comply with
the following requirements in addition to those in sub. (1):
(a) Gas extraction wells designed independent
of the leachate recirculation system shall not be used for leachate
distribution.
(b) Landfill gas may
be extracted through leachate distribution wells to supplement the permanent
gas extraction system.
(4) HORIZONTAL DISTRIBUTION SYSTEMS.
Horizontal distribution systems shall comply with the following requirements in
addition to those in sub. (1):
(a) Leachate
shall not be discharged continuously to individual distribution pipes. Periodic
rest periods shall be incorporated into the operating schedule to allow for
absorption of leachate into the waste mass and for extraction of landfill
gas.
(b) Landfill gas may be
extracted through leachate distribution pipes to supplement the permanent gas
extraction system.
(5)
ANNUAL REPORTING FOR LEACHATE RECIRCULATION. An annual report shall be
submitted to the department by April 30 of each year for leachate recirculation
activities occurring during the previous calendar year. The report shall
include:
(a) The results of the liquid mass
balance measurements for each leachate drainage basin.
(b) The leachate head levels for each
leachate drainage basin.
(c) Graphs
showing the volumes of leachate extracted and recirculated and precipitation
received for each leachate drainage basin.
(d) Graphs over the time period since
leachate recirculation was initiated, for each parameter required to be sampled
in s.
NR 507.215.
(e) Summary of warning symptoms,
terminations, resumptions of leachate recirculation after termination, and any
operating problems and resolutions.
(f) Documentation drawings or diagrams
showing the installed details of the leachate distribution system added or
revised since the previous annual report, including but not limited to piping,
pumps and distribution media.