(1)
REQUIREMENTS. Landfills shall meet the requirements of subs.(2) and (3) where
they will accept municipal solid waste and contain leachate collection lines
that exceed 1,200 feet from the end of each cleanout to the toe of the opposite
slope. Where the requirements of this section differ from other requirements of
this chapter, these requirements shall take precedence.
(2) PIPE AND TRENCH. In addition to the
information specified in s.
NR 516.04(3)
(d), reports documenting the construction of
all new landfill areas shall include the following information, at a minimum:
(a) Observations of collection trench and
leachate collection pipe installation. Observations shall verify that
collection pipe is handled and placed in a manner that prevents holes from
being blocked by mud and that assures that holes are located 45 degrees from
the springline. Records shall note any changes in alignment of collection
trenches or leachate collection pipes and construction methods which produce
obstructions or interference with pipe cleaning equipment. Specifications of
pipe, specialty fittings and sweep bends installed in construction shall be
included in tables or appendices to reports. Documentation of sweep bends shall
include the fabricated or field-achieved radius of bend and conformance with
minimum radii of bend specified by approved plans or required by the
department's plan approval. Reports shall describe methods used to provide
support and cover for collection pipe, specialty fittings and sweep
bends.
(b) Documentation of the
presence of registered engineers or qualified technicians providing quality
assurance monitoring during all aspects of installation of leachate collection
pipe and pipe bedding and placement of aggregate cover over the pipe.
(c) Documentation of initial leachate
collection pipe cleaning after placement of the leachate collection layer. This
documentation shall include, at a minimum:
1.
The equipment, methods and chemicals that were used successfully to insert
cleanout devices through all leachate collection pipes from each access point
to, at a minimum, the toe of the opposite sideslope.
2. The necessary minimum hose or machine
pressures, nozzles, hose materials and other features necessary to achieve
successful cleaning of leachate collection pipes.
3. Any significant adaptations needed to
complete pipe cleaning, and any problems encountered in pipe cleaning and their
resolution.
4. Any repairs or
modifications made to the collection piping in response to the pipe cleaning
operation.
5. Recommendations to
the operator for the necessary equipment, specifications, and operating
conditions for future pipe cleaning.
(3) SOIL TESTING. Testing shall be performed
during the construction of any landfill areas. At a minimum, this testing shall
include test results from a minimum of one hydraulic conductivity test
performed on representative samples of drainage media used for the leachate
collection blanket and for the leachate collection trench backfill. The test
procedure and any adaptations used to accommodate high-capacity drainage
material shall be identified.
