NR 503.10(2)(h)8.8. A description of landfill operations, actions taken when phases of the landfill reach waste final grades, and closure of phases at waste final grades. The report shall include a discussion of the anticipated sequence of the required events for closure of the landfill and a discussion of those actions necessary to prepare the landfill for long-term care and final use. NR 503.10(2)(h)9.9. A proposed long-term care schedule describing the procedures to be utilized for the inspection and maintenance of cover vegetation; storm water control structures; waste or ground surface settlement or siltation; erosion damage; gas and leachate control features; gas, leachate and groundwater monitoring; and other long-term care needs. The report shall include a final use plan for the landfill. NR 503.10(2)(h)10.10. Specifications for construction, operation and closure of the landfill. These specifications shall include detailed instructions to the operator and any contractors for all aspects of construction and operation. References to specifications on the plan sheets shall be described. This may include information such as tank manufacturer installation instructions and pump performance criteria, materials and construction methods for sideslope risers, sidewall penetrations, sump areas and all piping located outside the limits of filling. NR 503.10(2)(h)11.11. An explanation of all design calculations to facilitate department review and provide the necessary information on financial responsibility for closure and long-term care of the landfill. The report shall include a discussion of all calculations, such as waste to cover balance computations, base liner and final covering soils materials needs related to available borrow soil volumes, stockpile sizing estimates, shear resistance calculations for geosynthetic materials and soil layers, design of the storm water management system, infiltration and leachate collection and leakage volumes. All calculations shall be summarized with the detailed equations presented in the appendix of the report. References to the appropriate plan sheets, from which variables are obtained for these calculations shall be included in these summaries. NR 503.10(2)(h)12.12. A detailed analysis in accordance with ch. NR 520 shall be made of the costs associated with closure of the landfill and of performing each year of long-term care. All assumptions used in developing the cost estimates shall be listed, including sources of the cost estimates and rationale for the selected cost factors. The anticipated operating life and replacement schedule of all engineering design features shall be addressed and reflected in the cost estimates. The proposed methods of establishing proof of financial responsibility for closure and long-term care under ch. NR 520 shall also be specified. NR 503.10(2)(h)13.13. An appendix shall be included which lists the references used and includes any additional data not previously presented, supplemental design calculations, material specifications, operating agreements and any miscellaneous agreements such as easements, documents related to long-term care funding and other appropriate information. At a minimum, the appendix of the report shall include the following written agreements: NR 503.10(2)(h)13.b.b. A signed clay procurement agreement or option for acquisition of the borrow source property for the volumes necessary to construct and close the first major phase of the landfill. NR 503.10(2)(h)14.14. Proposed environmental monitoring plan which, at a minimum, complies with the requirements of sub. (7). NR 503.10(3)(3) Design requirements. Intermediate size construction and demolition waste landfills shall be designed to contain and collect leachate to the maximum practical extent. This shall be accomplished by designing the landfill to meet the standards contained in the applicable portions of this subsection unless the department approves an alternate design which provides equal or greater protection. NR 503.10(3)(a)(a) If the applicant does not complete construction of the first major phase of the landfill within 2 years from the date of the report approval, the applicant shall reapply to the department for approval to construct the landfill. The department may require additional conditions of approval and require redesign of the landfill in accordance with state-of-the-art design criteria. NR 503.10(3)(b)(b) Except as provided in par. (c), all landfills regulated under this section shall be designed with a clay liner which meets the following requirements: NR 503.10(3)(b)1.b.b. A saturated hydraulic conductivity of 1x10-7 cm/sec or less, when compacted to required moisture contents and densities based on the modified Proctor method, standard Proctor method, or a department-approved line of optimums method. NR 503.10(3)(b)1.d.d. An average plasticity index of 12% or greater with no values less than 10%. NR 503.10(3)(b)2.2. The separation distance between the seasonal high groundwater table and the bottom of the clay liner shall be at least 10 feet except for zone-of-saturation landfills. NR 503.10(3)(b)3.3. The separation distance between the competent bedrock surface and the bottom of the clay liner shall be at least 10 feet. NR 503.10(3)(b)4.4. The slope of the clay liner surface toward the leachate collection lines shall be at least 2%. NR 503.10(3)(b)5.5. The minimum thickness of the clay liner at all locations shall be 3 feet. NR 503.10(3)(b)6.a.a. All clay layers in the liner shall be constructed in lift heights no greater than 6 inches after compaction using footed compaction equipment having feet at least as long as the loose lift height. As needed, clay shall be disked or otherwise mechanically processed prior to compaction to break up clods and allow for moisture content adjustment. Clod size shall be no greater than 4 inches. NR 503.10(3)(b)6.b.b. A sufficient number of passes of the compaction equipment shall be made over each lift of clay to ensure complete remolding of the clay. NR 503.10(3)(b)6.c.c. All clay shall be compacted to 90% modified or 95% standard Proctor density at a moisture content at least 2% wet of optimum if using the modified Proctor method and wet of optimum if using the standard Proctor method, based on the characteristics of the appropriate Proctor curve for the clay being placed. As clay placement proceeds, the minimum density and moisture content targets shall be adjusted as necessary. The department may approve alternate methods of determining the quality of clay placement. NR 503.10(3)(b)7.7. The slope of the interior sidewalls of a landfill may not exceed 3 horizontal to one vertical nor be less than 5 horizontal to one vertical. NR 503.10(3)(b)8.8. The clay liner in adjacent phases shall be keyed together to form a continuous clay seal. This shall be accomplished by excavating steps along the edge of the existing lined phase and overlapping the lifts of clay being placed for the liner of the new phase with the steps in the existing clay liner. A minimum of 4 steps shall be included, with the total width of the spliced area measuring a minimum of 15 feet. NR 503.10(3)(c)(c) All landfills regulated under this section which are proposed with base grades beneath the groundwater table shall meet the following requirements: NR 503.10(3)(c)1.1. The landfill shall be located in a fine-grained soil environment.