d) Elevations showing cross sections to illustrate excavation and
landfill surface development at several locations across the fill. Cross
sections should be prepared for each phase of the development plan (i.e.,
interim and final).
e) Groundwater monitoring well locations, depths, and configurations
f) Details illustrating the types and locations for site facilities
undimensioned configurations to be used, including drainage structures,
liners, gas control vents, and onsite roads.
g) Conceptual site closure plan indicating the types of vegetation t
be used for final site landscaping, onsite appurtenances, and other
improvements.
h) A conceptual design report. Topics typically described in a
conceptual design report are given in Table 19. Construction designs
contain sufficient detail to enable a bid package to be advertised for a
contractor to fully construct all plan elements at the appropriate time.
For example, drainage structures are completely sized, precise locations
noted by coordinates, bearing, and distance or other means; and
environmental control systems, including those for leachate and landfill
management, are fully designed. A landfill is an ongoing construction
project in that its configuration is continually changing until completio
Thus, it is prudent to prepare construction documents for future phase
development elements (e.g., a drainage channel) that are dependent on
previous landfilling activities only when assured that the configuration
location of the element shall not be impacted by landfilling activities
prior to their construction.
7.4.4 Design Features. The designer of a solid waste sanitary landfill
should prescribe the method of construction and the procedures to be
followed in disposing of the solid waste. There is no one "best method"
all sites, nor is one single method always best for any given site. The
method(s) selected depends on the site's physical conditions and the amou
and types of solid waste to be handled.
Virtually all sanitary landfill designs incorporate the solid waste c
as a basic element. All solid waste received is spread in 2- to 3-foot
(0.6- to 0.9-meter) layers, and then compacted within a confined area. A
the end of each working day, or more frequently, the solid waste cell is
covered completely with a continuous compacted layer of soil at least 6
inches (150 millimeters) thick. The compacted waste and soil cover
constitute a cell. A series of adjoining cells at the same height make u
lift (see Figure 15). The completed fill consists of one or more lifts.
Cell heights generally range from 8 to 15 feet (2.4 to 4.5 meters),
although this range can be exceeded on either end, depending on the daily
waste input. When deciding on the optimal lift height the designer shoul
attempt to conserve available cover soil while adequately accommodating a
much waste as possible.
Cover soil volume requirements are dependent on the surface area of
waste to be covered and the thickness of soil needed to perform particula
functions. Cell configuration can greatly affect the volume of cover
material needed. The surface area of exposed solid waste to be covered
should therefore be kept to a minimum. The width of the working face sho
be no wider than necessary to allow the delivery vehicles to safely unloa
without long delays. Typically, this distance is about four to five doze
widths wide.
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