Wisconsin Administrative Code › Department of Natural Resources › NR 100-199 - Environmental Protection General › Chapter NR 182 - Nonferrous Metallic Mineral Mining Waste Management › Section NR 182.1095 - Preconstruction meetings and reporting

Current through June 24, 2024
(1) For
				composite-lined or composite-capped mining waste facilities, the department
				shall schedule a preconstruction meeting with representatives of the owner
				prior to the initiation of construction for each phase of construction of the
				geomembrane component of the liner or cap. At a minimum, the meeting shall
				include the design engineer, the appropriate department district and central
				office staff, the engineer or engineers responsible for quality assurance of
				all aspects of construction, and the geomembrane installer. The department
				shall use the meeting to clarify or confirm design changes, acceptability of
				selected construction materials, and construction concepts or practices
				required in the approved plan of operation or identified in the preconstruction
				report.
(2) The owner shall prepare
				a preconstruction report for construction of each phase of a composite liner as
				well as each phase of a composite capping or cover layer. The department may
				also require a preconstruction report for each phase of construction that
				utilizes other geosynthetics, or when other geosynthetic materials are used in
				significant structural features of the facility. The owner shall submit the
				preconstruction report to the department no later than 15 days prior to each of
				the preconstruction meetings under sub. (1) for the construction of the
				geomembrane component of a composite liner or a composite capping layer. Unless
				otherwise specified, the owner shall submit 3 copies of each preconstruction
				report to the appropriate department office as directed by the department. The
				preconstruction report shall include all of the following:
(a) An explanation of any proposed revisions
				to the plan of operation. The report shall include detail diagrams
				incorporating the changes and include all instructions regarding the changes
				between the owner, the installer, and the quality assurance contractor. The
				report shall highlight and explain any proposed changes to the information
				provided in the plan of operation. If, in the department's opinion, major
				changes are proposed to previously approved plans, the department shall require
				a plan modification approval. The report shall indicate the proposed limits of
				installation and the schedule for construction.
(b) An identification of the manufacturer of
				the geomembrane, GCL, and other geosynthetics used in construction,
				manufacturer qualifications, technical specifications of the geomembrane resin
				and polymer selected, technical specifications for geotextile and reinforcement
				of the GCL, bentonite specifications used for manufacture of the GCL, and
				results of the manufacturer's quality control tests on the geomembranes and
				GCLs supplied to the project.
(bd)
				An identification of the fabricator of geotextiles and other geosynthetics used
				in site construction, technical specifications of the products and materials to
				be used, methods used to bond the materials together and to connect panels
				together, installation contractor, contractor qualifications, and on-site
				supervisory staff.
(bh) A
				description of any contractor-specific storage and material handling
				procedures, deployment methods, attachment methods, panel overlaps, patching,
				procedures for minimizing bentonite loss in the GCL, and acceptable limits on
				sub-grade for geomembrane or GCL, including maximum rut depth, maximum stone
				size, removal of gravel cobbles and other debris, and limits imposed by weather
				conditions.
(bm) A description of
				methods to be used to assure the GCL does not become saturated prior to
				covering with soil and the procedure that will be followed if the GCL does
				become saturated, methods and equipment to be used to place the geomembrane
				over the GCL, and the maximum time between deployment of the GCL and placement
				of soil cover layers.
(br) A
				description of the selected materials and source of the sideslope riser pipe,
				methods proposed to assemble and place the sideslope riser pipe, and measures
				to be taken to prevent puncture of the geomembrane below the sideslope riser
				pipe and protective drainage material.
(c) The results of a shear test conducted, in
				accordance with ASTM method D5321, which is incorporated by reference, on the
				soils and geosynthetic materials selected for use in construction of the liner
				system and the final cover system. The test shall be conducted using wetted
				soil and geomembrane interfaces. The shear test results shall be used to
				evaluate the stability of the geomembrane component over the clay component and
				the drainage layers and overburden placed on the geomembrane component. For
				designs which utilize a GCL, the shear test results shall be used to evaluate
				the stability of the geomembrane component over the GCL component and the soil
				barrier layer and the drainage layers and overburden placed on the geomembrane
				component. Wet unit weights of soils shall be used in analyses. If all soil and
				geosynthetic materials to be used are identical to those that were tested for a
				previous construction phase, then the test need not be conducted again. The
				department may waive testing of materials which are proposed exclusively for
				use on liners or final cover systems with slopes of less than 10 percent.
Note:
Copies of the ASTM D5321/D5231M-20,
				  "Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic
				  and Geosynthetic-Geosynthetic Interfaces by Direct Shear," revised 2020, are
				  available for inspection at the Department of Natural Resources, 101 South
				  Webster St., Madison, Wisconsin 53703; and the Legislative Reference Bureau, 1
				  E. Main St., Ste. 200; Madison, Wisconsin 53703; and for purchase at
http://www.astm.org
.
(d) A quality control plan which provides all
				information specified in s. NR 182.109(2) (c) 9., as well as identification of
				the installation contractor, contractor qualifications, and on-site supervisory
				staff. Any proposed changes to the quality control plan contained in a mining
				waste facility's approved plan of operation shall be highlighted and
				explained.
(e) A quality assurance
				plan that provides all information specified in s. NR 182.109(2) (c) 10. and
				11. and that identifies the registered professional engineer and qualified
				technician who will be providing quality assurance and that summarizes of their
				qualifications and related work experience.