Chapter NR 503

NR 503.10(4)(a)17. 17. A minimum separation distance of 100 feet shall be maintained between the limits of solid waste filling and adjacent property. The department may require additional separation distance if necessary to provide for vehicle access, drainage, monitoring, gas migration control, separation to adjacent homes or other landfill development factors.

NR 503.10(4)(a)18. 18. All topsoil within the landfill construction limits shall be salvaged and stored within the property boundaries for use in landfill closure. All stockpiled soil material which is not anticipated to be used within 6 months shall be seeded.

NR 503.10(4)(a)19. 19. All access roads to the active area of the operation shall be of all-weather construction and shall be maintained in good condition.

NR 503.10(4)(b) (b) All areas of the landfill property, including areas of temporary disturbance, with the potential for off-site migration of sediment shall be designed, constructed, operated and maintained according to the applicable requirements of s. NR 503.09 (4), and technical standards developed under subch. V of ch. NR 151, which include the following:

NR 503.10(4)(b)1. 1. Storm water shall be diverted away from the working area and areas already filled with solid waste.

NR 503.10(4)(b)2. 2. Storm water from upslope areas shall be diverted around disturbed areas to minimize erosion, entrained sediment and the amount of water contacting the disturbed area.

NR 503.10(4)(b)3. 3. The size and duration of disturbances shall be minimized, to the extent practicable, to minimize off-site sediment migration.

NR 503.10(4)(b)4. 4. While the site is disturbed, temporary measures shall be used to trap sediment and off-site sediment migration. This could include gravel breaks or the equivalent to minimize the transport of sediment off-site.

NR 503.10(4)(b)5. 5. Runoff channels shall be protected to prevent scour and erosion that generates sediment.

NR 503.10 Note Note: The technical standards developed by the Wisconsin department of natural resources, runoff management program are available at http://dnr.wi.gov/topic/stormwater/standards/ or can be obtained from the department of natural resources, bureau of waste management, 101 S. Webster Street, P.O. Box 7921, Madison, WI 53707-7921, [phone], [e-mail]. Copies are also available for inspection at the offices of the legislative reference bureau and the secretary of state.

NR 503.10(4)(c) (c) Storm water drainage ditches, structures and sedimentation basins shall be cleaned and maintained so that they properly control storm water and limit entrained sediment in accordance with approved engineering designs. The department may waive this requirement on a case-by-case basis for existing landfills.

NR 503.10(4)(d) (d) All areas of the landfill which do not contain solid waste and are planned for vegetative cover shall be topsoiled, seeded and mulched as soon as practical, but no later than 90 days after completion of construction or by October 15, whichever is earlier and, if construction is completed after September 15, no later than June 15 of the following year. This includes, but is not limited to, the landfill entrance, drainage ditches and surrounding areas. Erosion control measures shall be placed within 30 days after completion of construction. The seed type and amount of fertilizer applied shall be selected according to the type and quality of topsoil, its compatibility with native vegetation, and the final use. Unless otherwise approved by the department in writing, seed mixtures and sowing rates shall be those specified for right–of–ways according to section 630, 2003 edition of the Wisconsin department of transportation standard specifications for highway and structure construction and the 2004 supplemental specifications.

NR 503.10 Note Note: The 2003 edition of the Wisconsin department of transportation standard specifications for highway and structure construction and any annual supplemental specifications are available at http://www.dot.wisconsin.gov/business/engrserv/procedures.htm or can be obtained from the department of natural resources, bureau of waste management, 101 S. Webster Street, P.O. Box 7921, Madison, WI 53707-7921, [phone], [e-mail]. Copies are also available for inspection at the offices of the legislative reference bureau and the secretary of state.

NR 503.10(4)(e) (e) Disposal of solid waste shall begin at the edge of each phase. Solid waste shall be pushed out over the granular blanket. Vehicles may not be driven directly on the granular blanket. Disposal operations shall be conducted as follows:

NR 503.10(4)(e)1. 1. Except for portions of the sideslope greater than 10 feet above the base liner, a layer of solid waste at least 4 feet thick or an adequate amount of other frost protection material shall be placed over the granular blanket in all portions of the lined area prior to December 1st of the year following the year the clay liner was constructed. After this date, solid waste may not be placed on any portion of the liner or lower 10 feet of the sideslope not covered with a 4-foot thick layer of solid waste or other adequate frost protection material. Those portions of the liner or lower 10 feet of sideslope not covered with a 4-foot thick layer of solid waste or other frost protection material by this date shall be investigated for effects from freeze-thaw as specified by the department and shall be repaired and recertified during the next construction season, prior to waste placement. The requirements of this paragraph may be waived by the department.

NR 503.10(4)(e)2. 2. To provide for maximum compaction after the initial 4-foot lift of waste is placed, each single layer of solid waste shall be spread and compacted in 2-foot layers. An alternative plan for compaction of waste may be approved by the department.

NR 503.10(4)(f) (f) Effective means shall be utilized to prevent the migration of explosive gases generated by the waste fill. At no time may the concentration of explosive gases in any landfill structure, excluding the leachate collection system or gas control system components exceed 25% of the lower explosive limit for those gases. At no time shall the concentration of explosive gases in the soils or air within 200 feet of or beyond the landfill property boundary exceed the lower explosive limit for those gases. The department may require that the concentration of explosive gases not exceed the detectable levels for that gas at the landfill property boundary.

NR 503.10(4)(g) (g) Leachate shall be removed from all collection tanks, manholes, lift stations, sumps or other structures used for leachate storage as it is produced, including hours when the landfill is closed, such as overnight and weekends. Leachate shall be managed as follows:

NR 503.10(4)(g)1. 1. All leachate removed from a leachate collection system shall be disposed of at a wastewater treatment facility approved by the department and capable of accepting the leachate in accordance with the requirements of its WPDES permit. The landfill owner or operator shall immediately notify the department of any change in the availability of the designated wastewater treatment facility to accept or dispose of the leachate removed from the landfill. Waste may not be accepted at the landfill unless leachate is being managed in accordance with the landfill’s approved plan of operation and the requirements of this section.

NR 503.10(4)(g)2. 2. Any liquid which comes in contact with waste or accumulates in a portion of the landfill where active waste disposal operations are occurring shall be handled as leachate and properly treated as specified in subd. 1. unless otherwise approved by the department in writing.

NR 503.10(4)(g)3. 3. All leachate collection lines shall be cleaned with a water jet cleanout device with a maximum pressure of 10,000 pounds per square inch immediately after construction, and annually thereafter.

NR 503.10(4)(h) (h) Documentation for soil borrow sources shall comply with the requirements of s. NR 504.075.

NR 503.10(4)(i) (i) For all landfills that do not have a department-approved plan for phased development and closure, by October 15th of each year, all areas that are at final grades shall be capped, topsoiled and seeded unless otherwise approved by the department.

NR 503.10(4)(j) (j) Any person who maintains or operates a landfill, or who permits use of property for that purpose shall, when the fill area or portion thereof reaches final grade, or when the department determines that closure is required, cease to accept solid waste and close the landfill or portion thereof in accordance with the plan approval issued by the department and the following minimum practices unless otherwise approved by the department in writing:

NR 503.10(4)(j)1. 1. At least 120 days prior to closing the landfill, the owner or operator shall notify the department in writing of the intent to close the landfill and the expected date of closure. Prior to department notification, the owner or operator shall notify all users of the landfill of the intent to close the landfill so that alternative disposal options can be arranged.

NR 503.10(4)(j)2. 2. Signs shall be posted at all points of access to the landfill at least 30 days prior to closure indicating the date of closure and alternative disposal landfills. Landfills which are operated by and serve only a single waste generator and are not open to the public are exempt from this provision.

NR 503.10(4)(j)3. 3. Notice of the upcoming closure shall be published in a local newspaper at least 30 days prior to closure and a copy of the notice shall be provided to the department within 10 days after the date of publication. Landfills which are operated by and serve only a single waste generator and are not open to the public are exempt from this provision.

NR 503.10(4)(j)4. 4. Within 10 days after ceasing to accept solid waste, the owner or operator shall restrict access by the use of gates, fencing or other appropriate means to insure against further use of the landfill. If the final use allows access, access shall be restricted until closure has been completed and approved by the department.

NR 503.10(4)(j)5. 5. Closure activities shall begin within 30 days after ceasing to accept solid waste.

NR 503.10(4)(j)6. 6. Within 180 days after ceasing to accept solid waste or, if solid waste disposal operations terminate after September 15, by June 15 of the following year, the owner or operator shall complete seeding, fertilizing and mulching of the finished surface. The seed type and amount of fertilizer applied shall be selected depending on the type and quality of topsoil and compatibility with both native vegetation and the final use. Unless otherwise approved by the department in writing, seed mixtures and sowing rates shall be those specified for right–of–ways according to section 630, 2003 edition of the Wisconsin department of transportation standard specifications for highway and structure construction and the 2004 supplemental specifications.

NR 503.10 Note Note: The 2003 edition of the Wisconsin department of transportation standard specifications for highway and structure construction and any annual supplemental specifications are available at http://www.dot.wisconsin.gov/business/engrserv/procedures.htm or can be obtained from the department of natural resources, bureau of waste management, 101 S. Webster Street, P.O. Box 7921, Madison, WI 53707-7921, [phone], [e-mail]. Copies are also available for inspection at the offices of the legislative reference bureau and the secretary of state.

NR 503.10(4)(k) (k) The owner or operator of the landfill shall maintain the final cover. Repairs to the final cover shall be made as soon as possible after damage to the cap occurs. The following activities are prohibited at solid waste disposal facilities which are no longer in operation unless specifically approved by the department in writing:

NR 503.10(4)(k)1. 1. Use of the waste disposal area for agricultural purposes.

NR 503.10(4)(k)2. 2. Establishment or construction of any buildings over the waste disposal area.

NR 503.10(4)(k)3. 3. Excavation of the final cover or any waste materials.

NR 503.10(4)(L) (L) An owner or operator of a landfill may not accept waste containing free liquids.

NR 503.10(4)(m) (m) Owners and operators of landfills shall implement a program at the landfill for detecting and preventing the disposal of waste not specifically approved for acceptance. The program shall include the following:

NR 503.10(4)(m)1. 1. Inspections shall be made of every incoming load of solid waste unless the owner or operator receives approval in writing from the department to take other steps to insure that incoming loads do not contain wastes not specifically approved for acceptance.

NR 503.10(4)(m)2. 2. Landfill personnel shall be trained in accordance with ch. NR 524 to recognize waste not approved for acceptance.

NR 503.10(4)(m)3. 3. Each load of waste shall be dumped on a permanent inspection pad which is located outside of the waste fill area. Material which is salvageable may be moved to approved storage areas located adjacent to the inspection pad. The remaining material shall be inspected by the certified facility manager or site operator and all material which is approved for disposal at the landfill shall be moved to the active disposal area on the same day on which it is received.

NR 503.10(4)(m)4. 4. Waste which is not approved for acceptance at the landfill shall be rejected. The waste shall be reloaded in the vehicle which delivered the waste or placed in a waste container such as a roll off box or dumpster. This material shall be handled in accordance with all applicable regulations including but not limited to those relating to the transportation, storage, treatment and disposal of the rejected material.

NR 503.10(4)(m)5. 5. If waste not approved for disposal is discovered and is suspected of being hazardous or containing PCB’s at a concentration of 50 ppm or greater, the owner or operator of the landfill shall notify the department’s district or area solid waste or hazardous waste management specialist in writing within 2 days.

NR 503.10(4)(n) (n) The owner or operator of a landfill shall maintain a written operating record at the landfill during the operating life and 40 year long term care period of the landfill. The department may approve an alternate location for maintaining the record. The record shall contain information on all landfill locational criteria restrictions, inspection records, training procedures, notification procedures, plan approvals, closure and post closure plans and financial responsibility, and all demonstrations, certifications, findings, monitoring, testing, and analytical data required under chs. NR 500 to 538. Tonnage information shall be submitted to the department in accordance with s. NR 520.14. Load inspection records shall be maintained for a minimum of 3 years. The operating record shall be made available to the department upon request.

NR 503.10(4)(o) (o) The department may deny, suspend or revoke the approval of a landfill for failure to pay fees required under ch. 289, Stats., or for grievous and continuous failure to comply with the approved plan of operation or to comply with any requirement of chs. NR 500 to 538. Any failure to comply with any requirement or condition on 5 or more days within any 30 successive calendar days and which consists of action or inaction which may cause pollution as defined in s. 281.01 (10), Stats., or which may otherwise create nuisance conditions, is a grievous and continuous failure to comply with the requirement or condition.

NR 503.10(5) (5) Construction requirements. A report documenting all aspects of construction shall be prepared for the initial construction of the landfill; the construction of all subsequent phases or portions thereof; the construction of any storm water, groundwater, leachate or gas control structures; the implementation of remedial actions; and the closure of each major disposal area. Approval of a report which documents the construction of any portion of the base of a landfill shall be obtained from the department prior to initiating disposal operations in the newly established area, unless the department does not respond within 60 days after receiving a complete submittal, along with the appropriate review and construction inspection fees specified in ch. NR 520. Construction and closure of all landfills shall comply with the following:

NR 503.10(5)(a) (a) A registered professional engineer or qualified technician who is directly supervised by a professional engineer shall be continuously on-site throughout the construction and performing quality assurance duties relating to the following: placement and testing of the clay component of the liner and cover systems, manhole and tank installation, and burying piping prior to covering. The department may require that a registered professional engineer be present during other critical construction activities.

NR 503.10(5)(b) (b) Substitution of personnel under par. (a) shall only occur due to substandard performance, vacations or uncontrollable circumstances such as injury, illness, employee termination or resignation. Where justified by the size of the construction project, multiple registered professional engineers or qualified technicians may be deployed concurrently.

NR 503.10(5)(c) (c) A certification section shall be included as the first section of any construction documentation report prepared for the construction or closure of a portion of a landfill and shall include the following:

NR 503.10(5)(c)1. 1. The signed certification statement contained in s. NR 500.05 (4) as well as the seal of all registered professional engineers who either performed quality assurance work on the project or supervised qualified technicians who did so.

NR 503.10(5)(c)2. 2. A table clearly identifying each registered professional engineer and qualified technician who performed quality assurance during the construction; which aspects of construction each person provided on site quality assurance for; the number of days each was present at the landfill; and the total hours each spent at the site. The table shall also clearly identify the registered professional engineer supervising each qualified technician.

NR 503.10(5)(c)3. 3. A second table identifying who prepared each portion of the construction documentation report including both narrative and plan sheets.

NR 503.10(5)(c)4. 4. Separate signed statements by the professional engineers identified in subd. 2. certifying to the best of their knowledge, information and belief that the construction, of each item identified as follows, was accomplished in conformance with the approved plans and all applicable solid waste administrative code requirements. All observed deviations shall be explicitly noted and discussed including any changes in materials. This certification may not be construed to be either an implied or express guarantee or warranty regarding the performance of the construction documented in this report. No further qualifications to the certification statement may be made and each statement shall also clearly identify the personal observations, knowledge or other information on which the certification is based. The certification shall include the following items:

NR 503.10(5)(c)4.a. a. The clay component of a liner or cap. The statement shall specifically address the quality of clay material used and the methods utilized in its placement; connections with previously placed clay layers; preparation of leachate collection trenches, sumps, gas header trenches and any pipe penetrations through the clay liner; and placement of soil materials over the clay liner or clay capping layer.

NR 503.10(5)(c)4.b. b. Elements of the construction relating to leachate or storm water routing, collection, storage and transportation as well as gas extraction systems. The statement shall include but not be limited to: construction of leachate collection and transfer lines, side slope risers for leachate pumping, all liner penetrations, collection tanks, manholes, lift stations, lysimeters, gas extraction system construction and leachate headwells.

NR 503.10(5)(d) (d) The department may, under s. 289.91, Stats., inspect construction projects for the purpose of determining compliance with ch. 289, Stats., and chs. NR 500 to 538. The department’s district and central office staff shall be notified, by telefax, telephone or letter, at least one week prior to beginning each of the construction events specified by the department. A fee shall be paid to the department for each required inspection in accordance with s. NR 520.04 (5). The inspection fees shall be paid at the time the construction documentation review fee is submitted to the department.

NR 503.10(5)(e) (e) Reports documenting the construction of all new landfill areas shall contain a set of 24 inch by 36 inch engineering plan sheets, or alternative size if approved by the department in writing, prepared in accordance with s. NR 500.05 and containing:

NR 503.10(5)(e)1. 1. A plan view documenting the constructed grades for the sub-base, sidewalls, leachate collection trench undercuts and all sub-base appurtenances such as lysimeters and drain pipes, prior to liner placement. Documentation of the grades shall consist of spot elevations taken on a maximum 50-foot grid pattern, with leachate collection trench undercut elevations at least every 25 linear feet. If a total station or laser equipment is used to set elevations, the elevations may be taken every 50 linear feet. The approved sub-base grades shall also be shown for the same area in a clear and legible manner.

NR 503.10(5)(e)2. 2. Plan view drawings showing the locations of all the various soil testing performed. Each test location shall be clearly labeled with appropriate identification codes. The plan view drawings shall clearly show any areas where removal and recompaction of clay was necessary in order to attain the minimum required specifications. Multiple plan views may be shown on a single plan sheet if legibility is not compromised.

NR 503.10(5)(e)3. 3. A plan sheet documenting the constructed elevations for the liner system. This plan sheet shall contain spot elevations of the base, sidewalls and leachate collection trenches. Documentation of grades shall include spot elevations taken on a maximum 50-foot grid pattern, with leachate collection trench elevations taken every 25 linear feet. If a total station or laser equipment is used to set elevations, the elevations may be taken every 50 linear feet. The approved base grades shall be shown for the same area in a clear and legible manner.

NR 503.10(5)(e)4. 4. A plan view drawing showing the constructed base grades as well as the locations and elevations of all leachate collection and transfer piping, manholes, lift stations, culverts, berms and the location of all unsaturated zone, groundwater, gas, leachate monitoring and cleanout devices, surface drainage features and other pertinent structures. This information may be shown on the plan sheet required in subd. 3. if legibility is not compromised.

NR 503.10(5)(e)5. 5. A minimum of 4 cross-sections through the constructed area parallel and perpendicular to the base line of the landfill, 2 of which shall be in each direction. Additional cross-sections shall be prepared as necessary to add clarification. Each of the cross-sections shall show actual and design sub-base and base grade contours, the top of the granular drainage blanket, leachate pipe elevations and the actual base and sub-base contours of adjacent filled areas. The design sub-base and base grade contours do not need to be shown if there is not an observable variation from the design grades.

NR 503.10(5)(e)6. 6. Detail drawings, both plan view and cross-sections, of all manholes, lift stations, storage tanks, sumps and sideslope risers or locations where leachate transfer piping exits the lined area and the secondary containment of these features as well as leak detection monitoring points and other pertinent construction details. At a minimum, these drawings shall show base and top elevations, the invert elevations of all associated piping, pump details, float level elevations and the extent of recompacted clay placed around and below the structures. If float elevations are not available at the time of submittal of the construction documentation report, they shall be provided to the department when they are available.

NR 503.10(5)(e)7. 7. Cross section details shall be included to illustrate all important construction features of the liner, lysimeters, leachate collection trenches and sumps, and sediment control and storm water management systems.

NR 503.10(5)(e)8. 8. Detail drawings shall be included for leachate header lines or drain lines located 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.

NR 503.10(5)(e)9. 9. Additional plan sheets, patterned after those specified in subds. 1. to 8., shall be included for those landfills designed with multiple liners, groundwater gradient control systems or other nonstandard design features.

NR 503.10(5)(f) (f) The report shall contain a detailed narrative describing the construction of the area in a logical fashion. Particular emphasis shall be given to any deviations from the approved plan of operation and to the explicit construction methods used for all locations where leachate transfer piping exits the lined waste fill area. This report shall include the following information at a minimum:

NR 503.10(5)(f)1. 1. An analysis and discussion of all soil testing work performed. All density and moisture content testing results shall clearly indicate which Proctor curve is applicable to the soil being compacted. Any changes in the referenced Proctor curve shall be identified as to when they occurred and why the change was made. All raw data from the soil testing performed shall be included in an appendix to the construction documentation report unless other arrangements were previously approved by the department. The raw data shall be summarized using a tabulated format.

NR 503.10(5)(f)2. 2. A table containing thicknesses of each layer in the liner system on a 100-foot grid pattern.

NR 503.10(5)(f)3. 3. Documentation of the initial leachate collection pipe cleanout and pressure testing of force mains and leachate storage tanks. All provisions used to seal pipe connections, manhole sections and leachate storage tanks including protective coatings and corrosion protection shall be described. The manufacturer’s recommendations for the installation of all equipment shall be included. Any deviations from the recommendations shall be discussed.

NR 503.10(5)(f)4. 4. A series of properly labeled 35 millimeter color photographs documenting all major aspects of landfill construction. This shall include close-up photographs of the construction process including clay liner placement, leachate pipe placement including all places where transfer piping exits the lined waste fill area or sideslope riser installation, drainage blanket placement and the installation of all manholes, sumps, sideslope risers, lift stations and storage tanks. Panoramic views shall be included showing the prepared sub-base and the completed liner before and after granular blanket placement.

NR 503.10(5)(g) (g) All construction documentation reports for the closure of landfill areas shall contain 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 shall include:

NR 503.10(5)(g)1. 1. A plan sheet documenting the final waste 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. For areas less than 4 acres, a 50-foot grid shall be used.

NR 503.10(5)(g)2. 2. A plan view drawing for each one-foot thickness of clay placed showing the locations of the various soil testing performed at each test location. Multiple plan views may be presented on a single engineering plan sheet if legibility is not compromised.

NR 503.10(5)(g)3. 3. A plan sheet documenting the final landfill surface following topsoil placement. Documentation of grades shall include spot elevations taken on a maximum 100-foot grid. The approved final grades shall also be shown in a clear and legible manner. This plan sheet shall also show the locations of all manholes, lift stations, risers, head wells, gas venting systems, surface settlement monitoring points, storm water management and sediment control structures, environmental monitoring points and other appurtenances. For areas less than 4 acres, a 50-foot grid shall be used.

NR 503.10(5)(g)4. 4. A minimum of 4 cross-sections through the closed area which are constructed parallel and perpendicular to the base line of the landfill, 2 of which shall be in each direction. Each of the cross-sections shall show all surficial and subsurface features encountered including gas 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 sub-base grades, base grades, final waste grades and final topsoil grades.

NR 503.10(5)(g)5. 5. Detail drawings, plan view and cross-section of the gas venting system, manholes, lift stations and collection tanks.

NR 503.10(5)(g)6. 6. Cross section details shall be included to illustrate all important construction features of the final cover, including sediment control and storm water management structures.

NR 503.10(5)(h) (h) The report shall contain a detailed narrative describing the closure of the area in a logical fashion. Particular emphasis shall be placed on any deviations from the approved plans. This report shall also include the following information at a minimum:

NR 503.10(5)(h)1. 1. An analysis and discussion of all soil testing work performed. All density and moisture content testing results shall clearly indicate which Proctor curve or line of optimums is applicable to the soil being compacted. Any changes in the referenced Proctor curve or line of optimums shall be identified as to when they occurred and why the change was made. All raw data from the soil testing performed shall be included in an appendix to the closure documentation report unless previously approved by the department. The raw data shall be summarized using a tabulated format. Also included shall be the make, model, weight and foot length of each piece of equipment used to compact clay.

NR 503.10(5)(h)2. 2. When the auger method is used to determine soil layer thickness, a discussion of how the auger boreholes were backfilled and the materials used.

NR 503.10(5)(h)3. 3. A table containing thicknesses of each layer in the cover system on a 100-foot grid pattern. When determining soil thickness by using surveying information, the table shall contain elevations before and after soil layer placement on the 100-foot grid. For areas less than 4 acres, a 50-foot grid shall be used. As an alternative to the survey method, soil thickness shall be controlled using settlement plates and grade stakes, and clay thickness shall be established on a 100-foot grid using auger borings. Boreholes shall be backfilled with a soil-bentonite mix such that the in-place permeability of the backfilled material is equal to or less than the surrounding clay cap.

NR 503.10(5)(h)4. 4. The rates and types of fertilizer, seed and mulch applied. Liming requirements shall also be included along with the actual rate of application.

NR 503.10(5)(h)5. 5. A series of properly labeled 35 millimeter color photographs which document all major aspects of landfill closure. This shall include panoramic views of the closed area as well as close-up photos of the construction process and completed engineering structures such as gas vents, cleanout ports, manholes and other pertinent structures.

NR 503.10(5)(i) (i) Testing shall be performed during the construction and closure of all landfill areas. At a minimum, this testing shall include:

NR 503.10(5)(i)1. 1. For all recompacted clay soil construction the following tests shall be performed:

NR 503.10(5)(i)1.a. a. Dry density and as-placed moisture content shall be determined on an approximate 100-foot grid pattern for each one-foot thickness of clay placed. The grid pattern shall be offset on each subsequent layer of tests. A minimum of 2 dry density and moisture content tests for each one-foot thickness of clay placed shall be performed to fully define the degree of soil compaction obtained in confined areas where equipment movement is hindered or hand compaction is necessary.

NR 503.10(5)(i)1.b. b. One moisture-density curve shall be developed for every 5,000 cubic yards or less of clay placed and for each major soil type utilized. At least 5 points shall be established on each curve. If a line of optimums analysis is performed, at least 2 curves shall be included for each analysis. A representative sample for every 5,000 cubic yards or less of clay placed shall be analyzed for grain size distribution through the .002 millimeter particle size and for Atterberg limits. If apparent changes in soil quality are observed during clay placement, a one-point Proctor analysis shall be utilized to verify the applicability of previously analyzed moisture-density curves.

NR 503.10(5)(i)1.c. c. A minimum of one undisturbed sample for each acre or less for every one-foot thickness of clay placement shall be retrieved and analyzed for Atterberg limits, grain size distribution through the .002 millimeter particle size, moisture content and dry density. Laboratory hydraulic conductivity tests using effective stresses less than or equal to 5 psi and hydraulic gradients less than or equal to 30 shall be performed on every third undisturbed sample. The department may require that a portion of the hydraulic conductivity testing for liner documentation be performed using leachate.

NR 503.10(5)(i)2. 2. During placement of the leachate drainage blanket over the liner or the granular drain layer in the final cover, the following testing shall be performed: