Wisconsin Administrative Code › Department of Natural Resources › NR 500-599 - Environmental Protection - Solid Waste Management › Chapter NR 516 - Landfill Construction Documentation › Section NR 516.06 - Closure of landfill areas

Current through June 24, 2024
In addition to the requirements of s.
				  NR
				  516.04(3), all construction
				  documentation reports for the closure of landfill areas shall contain the
				  following minimum information:
(1)
				ENGINEERING PLANS. A set of 24 inch by 36 inch engineering plan sheets, unless
				an alternative size is approved by the department in writing, prepared in
				accordance with s.
				NR
				500.05 and including:
(a) A plan sheet documenting the final refuse
				grades, including daily or intermediate cover. Documentation of grades shall
				include spot elevations taken on a maximum 100-foot grid after grading has been
				performed to establish uniform slopes. Documentation of grades for landfills
				which primarily accept papermill sludge or other low strength wastes may be
				performed at the surface of the support layer, accompanied with documentation
				of the thickness of the support layer on a 100-foot grid and the orientation of
				any geosynthetics and pipe used for reinforcement, separation, filtration or
				drainage. For areas less than 4 acres, a 50-foot grid shall be used.
(b) A plan view drawing for each one-foot
				thickness of clay or soil barrier layer placed showing the locations of the
				various soil testing completed and detailing the tests performed at each
				location. Multiple plan views may be presented on a single engineering plan
				sheet if legibility is not compromised.
(c) A plan view drawing showing the location
				of all geomembrane tests, geomembrane panel layout, geomembrane patches and
				seam repairs, and geomembrane destructive samples.
(d) A plan sheet documenting the constructed
				final cap grades prior to topsoil placement on a maximum 100-foot grid.
				Approved final cap grades shall be shown for the same area in a clear and
				legible manner. For areas less than 4 acres, a 50-foot grid shall be
				used.
(e) A plan sheet documenting
				the gas and condensate transfer piping layout, top of header pipe elevation at
				each gas extraction well, at all major changes in slope and at the driplegs and
				the condensate tank, and the location of the anti-seep collar around pipes
				exiting the waste.
(f)
				Cross-sections through the closed area which are constructed parallel and
				perpendicular to the base line of the landfill. A minimum of 4 cross sections
				shall be submitted, 2 of which shall be in each direction. Each of the
				cross-sections shall show all surficial and subsurface features encountered
				including gas extraction wells or vents, leachate lines, and other landfill
				structures and shall be tied into the grades of adjacent previously filled
				areas. At a minimum, each cross section shall show actual sub-base grades, base
				grades, final refuse grades, and final topsoil grades.
(g) Detail drawings, plan view and
				cross-section, of typical gas extraction wells or gas vents, bedding and
				assembly of the lateral and header pipes, header pipe joining details, header
				pipe exiting the site, valves, driplegs, manholes, lift stations, collection
				tanks, and blower building and flare.
(h) Cross section details shall be included
				to illustrate all important construction features of the final cover, drainage
				systems for gas condensate, and sediment control and storm water management
				structures.
(i) Detail drawings
				shall be included for gas header and gas condensate drain lines outside the
				limits of waste in critical areas of below-ground piping such as where several
				pipes cross or meet to illustrate sufficient pipe location and invert
				information.