Loading...
7302_DukeRoxboro_RevOpsPlan_DIN27543_20170306526 South Church St. Charlotte, NC 28202 P.O. Box 1006 Mail Code EC13K Charlotte, NC 28201-1006 336-215-4576 704-382-6240 fax Page 1 of 1 March 6, 2017 North Carolina Department of Environmental Quality Division of Waste Management Solid Waste Section 1646 Mail Service Center Raleigh, North Carolina 27699 Attn: Ms. Shannon Aufman (submitted electronically) Re: Roxboro Industrial Solid Waste Landfill Operations Plan Update Permit No. 7302-INDUS-1988 Roxboro Steam Electric Plant 1700 Dunnaway Road Semora, North Carolina 27343 Dear Ms Aufman, Duke Energy is submitting the attached revised Operations Plan for the Roxboro Steam Electric Plant Landfill (Permit No. 7302-INDUS) for approval by the Division. Revisions include: If you need additional information in regards to this submittal please do not hesitate to call me at 336-215-4576 or email kimberlee.witt@duke-energy.com. Regards, Kimberlee Witt, PE Environmental Services Attachments: Roxboro Landfill Operations Plan Revision 5 cc: Ed Mussler - NCDEQ Larry Frost - NCDEQ Evan Andrews - Duke Energy Robert Howard – Duke Energy Robert Miller – Duke Energy Ed Sullivan – Duke Energy • Revised Section 2.1.2 language to be in agreement with Permit 7302 Part IV #21 dated December 20, 2016. • Updated Table 3 (Required Regulatory Submittals) to include Annual Dam Safety Report. Prepared For: Duke Energy Progress, LLC 526 S. Church St., Charlotte, NC 28202 Date March 6, 2017 Prepared By: Amec Foster Wheeler 2801 Yorkmont Rd., Charlotte, NC 28208 Landfill Operations Plan Roxboro Industrial Landfill (SW Permit No. 7302) Duke Energy Progress– Roxboro Steam Station Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Amec Foster Wheeler Project No. 7810170864 TOC March 6, 2017 DESCRIPTION OF REVISIONS The Operations Plan was originally submitted to the North Carolina Department of Environmental Quality (NCDEQ) in November of 1988 and modified as shown in the following table: Revision Date of Document Description of Revisions Initial Issue November 21, 1988 Initial issuance of document. Revision 1 June 22, 2002 Permit to Construct Phases 1, 2 and 3 Revision 2 May 28, 2010 Permit to Construct Phases 4 and 5 Revision 3 August 7, 2013 Permit to Construct Phase 6 Revision 4 October 15, 2015 Phase 6 Vertical Expansion:  Removed Phase 6B.  Addition of vacuum type waste stream.  Revised waste acceptance location to include CCR disposal from other Duke Energy Corporation facilities.  Revised waste handling to allow for gypsum reuse.  Revised density testing section. Revision 5 March 6, 2017  Revised Section 2.1.2 language to be in agreement with Permit 73-02 Part IV #21 dated December 20, 2016.  Updated Table 3 (Required Regulatory Submittals) to include Annual Dam Safety Report. Amec Foster Wheeler Project No. 7810170864 TOC March 6, 2017 Contents 1 GENERAL FACILITY OPERATIONS .................................................................................................... 1 1.1 Overview ....................................................................................................................................... 1 1.2 Contact Information ....................................................................................................................... 1 1.3 Safety ............................................................................................................................................ 1 1.4 Access and Security Requirements .............................................................................................. 1 1.5 Operating Hours ............................................................................................................................ 2 1.6 Signs ............................................................................................................................................. 2 1.7 Training ......................................................................................................................................... 2 1.8 Record Keeping for Operations Plan ............................................................................................ 2 1.9 Design Drawings ........................................................................................................................... 3 2 OPERATIONS MANAGEMENT ............................................................................................................ 5 2.1 Waste Handling and Landfill Sequencing ..................................................................................... 5 2.1.1 Landfill Capacity ........................................................................................................................ 5 2.1.2 Waste Acceptance, Disposal, and Screening Requirements .................................................... 5 2.1.3 Dust, Litter, Odor, and Vector Control ....................................................................................... 6 2.1.4 Fire Control ................................................................................................................................ 6 2.1.5 Landfill Sequencing ................................................................................................................... 6 2.1.6 Waste Placement ...................................................................................................................... 6 2.1.7 Compaction Requirements and Testing .................................................................................... 8 2.1.8 Cover Requirements ................................................................................................................. 8 2.1.9 Groundwater Monitoring Well Access Requirements ............................................................... 9 2.2 Leachate and Stormwater Management ....................................................................................... 9 2.3 Leachate Collection System (LCS) ............................................................................................. 10 2.3.1 LCS Maintenance .................................................................................................................... 10 2.3.2 LCS Record Keeping and Sampling ....................................................................................... 10 2.3.3 Contingency Plan .................................................................................................................... 10 2.4 Leak Detection System (LDS) ..................................................................................................... 11 2.4.1 LDS Maintenance .................................................................................................................... 11 2.4.2 Record Keeping and Monitoring .............................................................................................. 11 2.4.3 Response Action Plan ............................................................................................................. 12 2.5 Stormwater Collection and Conveyance ..................................................................................... 13 2.5.1 Stormwater Discharge ............................................................................................................. 13 2.6 Landfill Gas Management ........................................................................................................... 14 3 EROSION AND SEDIMENT CONTROL ............................................................................................. 14 3.1 E&SC Measures Monitoring and Maintenance ........................................................................... 14 3.2 Surface Erosion Monitoring ......................................................................................................... 14 4 VEGETATION MANAGEMENT ........................................................................................................... 15 4.1 Temporary Seeding ..................................................................................................................... 15 4.2 Permanent Seeding .................................................................................................................... 16 4.3 Over-Seeding .............................................................................................................................. 16 5 LANDFILL CLOSURE .......................................................................................................................... 16 6 REQUIRED REGULATORY SUBMITTALS ........................................................................................ 17 Amec Foster Wheeler Project No. 7810170864 TOC March 6, 2017 List of Tables Table 1 Design Drawings Table 2 Lined Landfill Capacity Table 3 Required Regulatory Submittals List of Appendices Appendix I Dust Control Plan Appendix II Engineering Drawings Appendix III Closure/Post-Closure Plan Appendix IV Emergency Response Plan (ERP) Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 1 of 17 March 6, 2017 1 General Facility Operations 1.1 Overview The purpose of this Operations Plan is to provide a plan for the safe and efficient operations of the Roxboro Industrial Landfill. This Operations Plan presents the operational requirements for: 1) General Facility Operations, 2) Operations Management, 3) Erosion and Sedimentation Control, and 4) Vegetation Management, along with guidance for Landfill Closure and Required Regulatory Submittals. The Operations Plan was prepared consistent with 15A NCAC 13B .0505 Operational Requirements for Sanitary Landfills rules. The Roxboro Steam Station is located at 1700 Dunnaway Road in Semora, Person County, North Carolina. The Roxboro Industrial Landfill is owned and operated by Duke Energy Progress, LLC (Duke). The landfill is located on Roxboro Steam Station property, southeast of the Roxboro plant. 1.2 Contact Information Correspondence and questions concerning the operation of the Roxboro Industrial Landfill should be directed to the appropriate entity as follows: Owner Duke Energy Progress, LLC – Roxboro Steam Station 1700 Dunnaway Rd, Semora, NC 27343 (336) 597-6172 Facility Contact: Landfill System Owner State Regulatory Agency North Carolina Department of Environmental Quality Division of Waste Management, Solid Waste Section Asheville Regional Office 2090 US Highway 70, Swannanoa, North Carolina 28778 Permitting Engineer: Mr. Larry Frost 1.3 Safety Landfill operations at the Roxboro Industrial Landfill were developed considering the health and safety of the facility’s operating staff. The operating staff is provided with site-specific safety training prior to landfill operations, and on-site activities are to be conducted according to the applicable sections of Duke’s Safe Work Practices. An Emergency Response Plan (ERP) is included as Appendix IV to provide guidance in the event of an on-site emergency at the landfill. 1.4 Access and Security Requirements The Roxboro Industrial Landfill is located entirely within Duke’s property limits. Security for the site is currently in place, consisting of fencing, gates, wooded buffers and security check stations. Unauthorized vehicle access to the site is prevented around the landfill property by security check stations, woods, fencing, gates and stormwater conveyance features. The access road to the site is of all-weather construction and will be maintained in good condition. Potholes, ruts, and debris on the road(s) will receive immediate attention in order to avoid damage to vehicles. Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 2 of 17 March 6, 2017 1.5 Operating Hours The Roxboro Industrial Landfill is operated seven days a week, as needed. 1.6 Signs A sign providing the landfill permit number and a statement reading, “NO HAZARDOUS OR LIQUID WASTE PERMITTED” is posted at the site entrance, and shall be maintained in good condition. Edge-of-liner markers are installed and delineate the edge of liner. These markers shall be maintained in good condition and remain visible at all times. 1.7 Training Due to the diversity and nature of job tasks required at the Roxboro Industrial Landfill, personnel shall be adequately trained to handle facility operations and maintenance. The System Owner for Landfill Operations shall have a general understanding of all the tasks required for site operations. Individuals performing the various tasks shall have adequate training for the site-specific tasks to which they are assigned. Duke shall provide a site-specific training program for facility personnel. Noteworthy operations and maintenance tasks to be addressed in training include: ► Maintaining accurate records of waste loading (quantitative and qualitative); ► Operating requirements for stormwater segregation from exposed waste areas; and ► Operating and maintaining the leachate collection system (LCS) and leak detection system (LDS). All training will be documented and training records will be kept on-site. The System Owner for Landfill Operations will conduct Operations Plan training courses in accordance with the permit requirements. 1.8 Record Keeping for Operations Plan An operating record is to be maintained on-site and include the following records: ► Leachate Collection Systems (LCS) – Periodic Maintenance Documentation; ► Leakage Detection System (LDS) – Periodic Maintenance Documentation; ► Leachate Monitoring; ► Erosion and Sedimentation Control Inspection Logs; ► Periodic Landfill Inspection Reports; ► Dust Control Plan Monitoring Worksheets (included in the Dust Control Plan); ► Groundwater Monitoring (and Sampling) Documentation; and ► Operations Plan. The above records are to be kept in the operating record for the active life of the Roxboro Industrial Landfill and the post-closure care period. Information contained in the operating record must be furnished upon request to the North Carolina Department of Environmental Quality (NCDEQ), Division of Waste Management, Solid Waste Section (Division) or be made available for inspection by the Division. Additional records kept on-site, or made accessible electronically at the site, should include: ► Solid waste facility permits; ► Vacuum truck waste logs; Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 3 of 17 March 6, 2017 ► Record of the amount of solid waste received summarized on a monthly basis based on scale records; ► Regulatory agency inspection reports; ► Site Suitability Study; ► Permit-to-Construct Application; ► Employee training program and records; and ► Landfill drawings and specifications. 1.9 Design Drawings A list of landfill design drawings is provided in Table 1. The design drawings provide the location of landfill features, landfill construction details, and technical design and construction notes. Table 1 – Design Drawings Vertical Expansion Permit Modification Application Drawings C-0.0 Cover Sheet C-1.1 Existing Conditions C-1.2 Facility Plan Phase 6 Vertical Expansion C-1.3 Previously Permitted Facility Plan C-2.1 Phases 3, 4 and 6 Post-Settlement Base Grades C-3.1 Phase 6 Chimney Drain Plan C-3.2 Phasing Plan – P6 to Elevation 608 C-3.3 Phasing Plan – P1-5 to Elevation 638 C-4.1 Vertical Expansion Final Grading and Drainage Plan D-1.1 Interim Cover Details D-1.2 Interim Cover Details D-2.1 Final Cover Details D-2.2 Final Cover Details D-2.3 Final Cover Details D-2.4 Final Cover Details D-3.1 Stormwater Details D-4.1 Erosion Control Details X-1.1 Cross Sections 2013 Approved Construction Plan Drawings CVR Title – Cover Sheet F1 Facility Plan Phase 1-5 F2 Facility Plan Phase 6 F3 1988 Approved Capacity Plan C1 Existing Conditions C2 Phase 6 Liner Grades and Leachate Collection System Plan C3 Protective Cover Grades C4 Phase 6 Final Cover Grades C5 Phase 6 Chimney Drain Plan C6 Settled Base Grade – Vertical Separation Plan C7 Engineering Cross Sections D1 Details – Liner Berm and Anchor Trench D2 Details – Leachate Collection System D3 Details – Layover Slope Liner D4 Details – Final Cover and Stormwater Control Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 4 of 17 March 6, 2017 2010 Approved Construction Plan Drawings S1 Existing Conditions S2 Site Development Plan – Base Grades S3 Site Development Plan – Final Cover Grades S4 Phase 4 Subgrade (Liner) Grading Plan S5 Phase 4 Top of LCS Grading Plan S6 Phase 5 Subgrade (Liner) Grading Plan S7 Phase 5 Top of LCS Grading Plan L1 Liner and Berm Details L2 Leachate Collection Details EC1 Final Cover and Stormwater Details EX1 Engineering Cross Sections (Sheet 1 of 2) EX2 Engineering Cross Sections (Sheet 2 of 2) P1 Phasing Plan 2002 Approved Construction Plan Drawings SC1 Site and Perimeter Features SC2 Monofill Development 1 SC3 Monofill Development 2 C1 Facility Plan C2 Existing Site Conditions C3 Geotechnical Boring Locations C4 Existing Landfill Closure Plan C5 Construction Sequencing Plan C6 Phases 1 3 Liner System C7 Phase 1 Operation Plan C8 Phase 2 Operation Plan C9 Phase 3 Operation Plan C10 Lift 4 Operation Plan C11 Final Closure Plan C12 Monitoring Plan C13 Cross-Section AA’ C14 Cross-Section BB’ D1 Liner Details D2 Drainage Details D3 Drainage Details D4 Drainage Details Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 5 of 17 March 6, 2017 2 Operations Management The primary objective of operations management at the Roxboro Industrial Landfill is to dispose of waste material in compliance with permit conditions while operating in a safe manner. The landfill development will be sequenced in phases as indicated on the Engineering Drawings for the Phase 6 Vertical Expansion. The final grading plan is also presented in the Engineering Drawings. In general, waste placement operations will be focused within a particular area (less than 5 acres in size) for the placement of a 10-foot thickness of waste prior to moving operations to a different area. As needed, soil diversion berms will be used to divert non-contact stormwater away from exposed ash. Areas of exposed ash will be graded to direct contact water to chimney drains. Intermediate cover will be placed on exterior slopes as each slope section reaches a height of approximately 10 feet. In general, the landfill operations contractor will limit the area of exposed CCR (i.e., the active area) to 5 acres or less, at the operator’s discretion and CCR in other areas will be covered with stabilizing agent or operational or intermediate cover in accordance with the Dust Control Plan. Contact water from the active area will be directed to chimney drains in the landfill interior. 2.1 Waste Handling and Landfill Sequencing 2.1.1 Landfill Capacity The capacity of the lined portion of the landfill is presented in Table 2 below. Table 2 – Lined Landfill Capacity Landfill Phase Gross Volume (CY) Previously Permitted Gross Volume for Phases 1-6 7,915,200 Calculated Volume of Previously Permitted Grades for Phases 1-6 (including 2013 final cover modification that reduced capacity by approximately 500,000 CY) 7,448,000 Increase from Phase 6 Vertical Expansion 1,964,000 Gross Capacity of Phases 1-6 including Vertical Expansion 9,412,000 2.1.2 Waste Acceptance, Disposal, and Screening Requirements The Roxboro Industrial Landfill is permitted to receive solid waste generated by or at any Duke Energy Corporation property, as described in this plan and as defined in G.S. 130-290 (a)(2b), except where prohibited by the N. C. General Statues Article 9 of Chapter 130A, and the rules adopted by the Environmental Management Commission. Waste types include, but are not limited to: ► Gypsum produced during the Flue Gas Desulfurization (FGD) process; ► FGD clarifier sludge; ► Waste limestone material, boiler slag, and sand blast material; ► Ball mill rejects; ► Waste water treatment sludge; and ► Other waste streams produced by coal-fired electric or steam generation unit wastes. The landfill owner or operator shall notify the Division within 24 hours of attempted disposal of any wastes the landfill is not permitted to receive. At a minimum, hazardous waste, yard waste, liquid wastes, Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 6 of 17 March 6, 2017 regulated medical waste, sharps not properly packaged, polychlorinated biphenyls (PCB) waste as defined in 40 Code of Federal Regulations (CFR) 761, and wastes banned from disposal in North Carolina by General Statute 130A-309.10(f), must not be accepted at the landfill. Asbestos will not be disposed of in the landfill. The removal of waste from the landfill is prohibited without owner approval. See Section 2.1.6 – Waste Placement for storage and removal (mining) of gypsum. Waste will be hauled and disposed of by dedicated and consistent operators from the waste source to the landfill. Access to the interim waste storage locations (i.e. fly ash silos, gypsum storage areas, etc.), haul roads, and landfill are restricted; therefore, no screening of waste is recommended. 2.1.3 Dust, Litter, Odor, and Vector Control Litter, odors, and vectors are not anticipated to be concerns at the Roxboro Industrial Landfill. The waste placed in the landfill does not attract vectors, and windblown material is not anticipated to be a problem. Odors are typically not a problem at CCR waste landfills. Dust control is addressed in the Dust Control Plan included as Appendix I. Generally, dust control measures will be implemented when necessary, and will include at a minimum, watering of dusty roads with non-contact water and the active area with contact or non-contact water. Other measures include physical measures such as fencing and/or berms, temporary covers (like tarps), spraying dust suppressants, and modifying the active area. Additionally, interim cover will be vegetated as soon as practical in order to minimize the blowing of dust on-site. 2.1.4 Fire Control No open burning shall be permitted at the Roxboro Industrial Landfill. There are no explosive gas concerns with ash waste, waste soils, and construction and demolition debris from ash basin decommissioning; therefore, the threat of fire is considered to be minimal. Although it is unlikely, if a fire occurs at the landfill, the Station Control Room (phone number: 336-597- 6172) shall be notified, and equipment and stockpiled soil shall be provided to control accidental fires. Roxboro Plant will notify the local fire department, which will be immediately dispatched to assist with fire control. Any fire that occurs at the landfill shall be reported to the Division within 24 hours, and a written notification will be submitted within 15 days by the Station Sponsor for Landfill Operations. 2.1.5 Landfill Sequencing The Roxboro Industrial Landfill will be developed in sequence from Phase 1 through Phase 9. Each phase has approximately 5 years of life; however, more than one phase may be operational at a time. The phases may also be subdivided into cells which could be constructed sequentially or at the same time. Contact water should be contained within the landfill and treated as leachate. In order to effectively manage leachate, temporary perimeter berms will be maintained around the active area. The active area surface shall be graded to promote surface water drainage to the contact water collection system. No waste shall be placed in standing water. The landfill phasing drawings included in the Engineering Drawings illustrate a possible sequence of operations. The actual filling sequence, fill heights, and grades may be modified at the Owner’s discretion 2.1.6 Waste Placement 2.1.6.1 Fly Ash, Bottom Ash, and FGD Gypsum Fly ash, bottom ash, and FGD Gypsum shall be compacted using compactors and dozers in approximate 1-foot lifts to achieve a vertical operational lift thickness of 10 feet. Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 7 of 17 March 6, 2017 In order to protect the liner system and leachate components, gypsum placed in the active landfill with the potential of future mining will be stored in designated areas with a minimum separation of: ► Horizontal: 50’-0” from the landfill side slope or anchor trench ► Vertical: 10’-0” vertical separation from the top of protective cover (drainage layer). The vertical separation layer typically consists of ash or other waste material. 2.1.6.2 FGD Clarifier Sludge, Coal Mill Rejects, Waste Limestone Material, Boiler Slag, Sand Blast Material, Ball Mill Rejects, Coal Waste, Wastewater Sludge, and Pyrites FGD clarifier sludge, coal mill rejects, waste limestone material, boiler slag, sand blast material, ball mill rejects, coal waste, wastewater sludge, and pyrites will be spread in 6-inch lifts in the center of the operational area and shall not be placed within 25 feet of the exterior slopes. FGD clarifier sludge shall be blended with the other waste (i.e. ash) prior to placement of the next fill lift. FGD clarifier sludge, coal mill rejects, waste limestone material, boiler slag, sand blast material, ball mill rejects, coal waste, and pyrites shall be compacted as densely as practical. In-place density testing of these materials is not required. 2.1.6.3 Vacuum Truck Waste Vacuum trucks are used to remove waste materials from the plant areas that consist of various permitted CCR. The origin of the vacuum truck waste materials is typically from various sumps, catch basins, wheel wash stations, and coal pile sumps located within the plant. The moisture contents of the vacuum truck waste materials may vary considerably with the waste varying in consistency from a relatively dry state to a wet, fluid-like state depending on the amount of liquid present in the sumps or vacuumed areas. Vacuum trucks used to transport CCR will be dedicated to Duke operations or documentation will be obtained to ensure that the vacuum truck contains no human or other non-permitted waste streams. Vacuum truck waste could also mean similar waste material transported in smaller water tight units. Vacuum truck waste shall consist of permitted waste materials. Non-permitted waste materials inadvertently included with the vacuum truck waste, including but not limited to, yard trash (paper, plastic, wood, aluminum, Styrofoam, etc.) shall be visually screened and immediately removed from the vacuum truck waste after the waste material is dumped in the operational area by vacuum contractor. Vacuum truck waste shall only be placed within the landfill during landfill operating hours when landfill operator personnel are present. The vacuum contractor shall coordinate vacuum truck waste placement with landfill operator personnel. A Vacuum Truck Waste Disposal Log shall be used to document vacuum waste placement within the landfill. A Vacuum Truck Waste Disposal Log shall be used to verify the origin of vacuum truck waste and will include the date, time, weather conditions, estimated waste volume, visual waste screening and non- permitted waste removal, and Operator representative approval. The Vacuum Truck Waste Disposal Log may be modified as needed by the Owner or Operator to provide additional site specific operations information. The estimated volume of vacuum truck waste generated will be documented by the landfill operator along with monthly truck scale log records to estimate the cumulative vacuum truck waste transported and placed within the landfill. The consistency of the vacuum truck waste may vary from a relatively dry state to a relatively wet, fluid- like state. Vacuum truck waste material shall be moisture conditioned by initial decanting of excess moisture from the waste or by mixing the waste with fly ash, bottom ash, or gypsum materials depending on its consistency. The vacuum truck waste shall be placed and spread in maximum 6-inch lifts near the center of the operational area. The vacuum truck waste shall not be placed within 50 feet horizontally Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 8 of 17 March 6, 2017 from exterior landfill slopes or within 50 feet of chimney drain structure locations. The vacuum truck waste material shall be thoroughly mixed with fly ash, bottom ash, or gypsum material during waste placement using a dozer or other similar grading equipment to provide additional moisture conditioning prior to compaction. In-place density testing of the vacuum truck waste material is not required. 2.1.7 Compaction Requirements and Testing 2.1.7.1 In-Place Density and Moisture Content Testing In-place density and moisture content testing shall be performed at a minimum frequency of three tests per 15,000 tons (or approximately one test per 135,000 square feet per 12-inch thick lift). Waste shall be compacted to a minimum 95 percent of its Standard Proctor (ASTM D698) maximum dry density. Compacted moisture content shall be within 5 percent of the material’s optimum moisture content as determined by ASTM D698. In-place density tests shall be performed using the Drive-Cylinder Method (ASTM D2937), or Nuclear Method (ASTM D6938). If the nuclear method is selected, a minimum of one comparison density test using the Drive Cylinder method shall be performed for every 10 nuclear density tests. All test results shall be reported to the Engineer of Record for the landfill. A sample of ash material shall be collected from each density test location and placed in a sealed container for subsequent field and laboratory moisture testing. The reported dry density shall be calculated based on the results of laboratory moisture testing. A family of Proctor curves shall be developed for the on-site ash material as standard Proctor moisture- density tests are performed as a reference for the field density testing. A minimum of one (1) one-point field Proctor test shall be performed during each compaction testing event. If the estimated standard Proctor maximum dry density based on the results of one-point Proctor testing indicates that the maximum dry density varies by more than 5 pcf from the nearest representative standard Proctor moisture-density relationship, an additional bulk sample of ash material shall be obtained and standard Proctor testing shall be performed and used to evaluate the degree of compaction for the related in-place density tests. If in the course of testing, the technician believes that due to changes in material a Proctor curve should be referenced other than that indicated by the initial one-point field Proctor, then an additional one-point field Proctor shall be performed. 2.1.7.2 Laboratory Testing Laboratory moisture content testing shall be performed in conjunction with the field density testing as described above. The laboratory moisture content testing shall be performed using the Oven Method (ASTM D2216), at an oven temperature of 60 degrees Celsius. Standard Proctor moisture-density relationship (ASTM D698) testing shall be performed at a minimum frequency of one test for every 30,000 tons of material placed. As previously mentioned, additional standard Proctor samples shall be obtained and tested if one-point Proctor testing indicates that the estimated maximum dry density of the material varies by more than 5 pcf from the nearest representative standard Proctor moisture-density relationship. 2.1.8 Cover Requirements 2.1.8.1 Operational Cover Operational soil cover should be applied, as needed, for dust control and stormwater management. The operational cover may be applied at a thickness suited to its purpose. For example, operational soil cover may be applied thinner to provide dust control and it may be applied in thicker layers where protection from surface erosion is desired. Operational soil cover is not required, provided the Dust Control Plan included as Appendix I is followed. Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 9 of 17 March 6, 2017 2.1.8.2 Intermediate Cover A 12-inch thick intermediate cover layer shall be placed on exterior slopes and areas where final grades have been reached. Intermediate cover material shall be free of protruding roots, stumps, and debris. Intermediate cover may not contain more than 5 percent gravel (particle sizes larger than 0.5 inches) by weight as determined by ASTM D422. Isolated rock fragments not exceeding 6 inches in diameter may be placed within the intermediate cover if completely surrounded by compacted soil if approved by the Engineer. Rock fragments shall not protrude more than 3 inches from the intermediate cover surface. Intermediate cover will be seeded within 7 days in accordance with Erosion and Sediment Control requirements. Vegetation shall be removed and the intermediate cover soil shall be scarified or removed prior to placing any overlying waste. For areas where waste placement will be inactive for 12 months or more within interior landfill areas (excluding exterior slope area), will not require intermediate soil cover, provided the Dust Control Plan included in Appendix I is followed. 2.1.8.3 Final Cover The final cover system for the Roxboro Industrial Landfill will be completed within 180 days following the beginning of closure activities unless otherwise approved by the Division. The final cover system will consist of the following components, from top to bottom: ► A 24-inch thick final cover soil layer (i.e., a 6-inch thick vegetative support layer overlying an 18- inch thick cover soil layer) consisting of a soil capable of supporting native plant growth; ► A double-sided geocomposite drainage layer; ► A 40-mil thick double-sided textured linear low density polyethylene (LLDPE) geomembrane; and ► Intermediate soil cover layer (may be thinner than the initial 12-inch thickness; geomembrane may be installed directly on waste). The soil components will provide a surface suitable to sustain vegetative growth while protecting the underlying geosynthetic components of the cover system. Infiltration through the cover soils will be collected by the geocomposite drainage layer, while the geomembrane will function as a hydraulic barrier to reduce infiltration into the waste mass. The cover system stormwater management structures will collect both infiltration and surface water runoff. The final cover will be vegetated within six months following closure. Refer to the Appendix III, Closure and Post-Closure Plan for final cover specifications and maintenance and operations requirements. 2.1.9 Groundwater Monitoring Well Access Requirements Groundwater monitoring wells will be located around the landfill perimeter. A readily accessible, unobstructed path shall be maintained so that monitoring wells may be accessed using four-wheel drive vehicles. Care must be taken around the wells to prevent any damage to the wells. 2.2 Leachate and Stormwater Management The leachate collection system (LCS) consists of a geocomposite drainage layer and collection pipes that provide gravity drainage of the leachate from the landfill. The leachate is conveyed by open channels to the West Ash Pond, which discharges in accordance with the Roxboro Steam Station plant’s existing National Pollutant Discharge Elimination System (NPDES) permit. Stormwater runoff from the landfill will be directed via a system of tack-on benches, roadside channels, and direct runoff to perimeter channels surrounding the landfill limits or to the Remnant East Ash Pond. The perimeter channels discharge either to the Remnant East Ash Pond or to channels that drain to the West Ash Pond. Final and interim stormwater management is shown on the Engineering Drawings. Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 10 of 17 March 6, 2017 Drainage from the concrete road between the silos and the landfill is considered to be contact water and is collected and pumped to the landfill settlement basin. The stormwater collection and conveyance system shall be checked regularly and maintained such that necessary repairs will be made as early as practical. 2.3 Leachate Collection System (LCS) The leachate collection system includes a geocomposite drainage layer, leachate collection pipes with clean-outs, and a protective cover layer. The leachate drains by gravity into stormwater channels and flows to the West Ash Pond which discharges in accordance with the plant’s NPDES permit. The leachate collection system has been designed to meet the performance criteria of providing less than 1 foot of leachate head on the liner system under normal operating conditions. The leachate collection system generally consists of the following components: ► Leachate collection system pipes within the landfill; ► open channels outside the landfill limits. Each landfill cell is equipped with leachate collection system (LCS) pipes located directly above the geocomposite drainage layer. The LCS pipes convey leachate flows by gravity from the landfill. Clean- outs have been provided at the ends of the leachate collection pipes. Chimney drains have been installed in each cell and are extended vertically upward as the top elevation of waste increases. Each chimney drain comprises a vertical, perforated HDPE riser pipe surrounded by a drainage material and a filter (either geosynthetic or granular). In Phases 1 through 5, the chimney drains connect to the leachate collection pipes. In Phase 6, there is a network of chimney drain collection pipes located an average of five feet above the protective cover. 2.3.1 LCS Maintenance The maintenance of the leachate management system's physical facilities (consisting of high-density polyethylene (HDPE) piping) and records will be performed by or under the direct supervision of Duke. Visual observations of the LCS system performance will be made monthly by Duke staff to verify that the LCS is performing properly. Clean-out pipes will be located on the LCS leachate pipes and header pipes. LCS pipes will be cleaned out by the use of a clean-out snake or high-pressure water flushing at least once a year, and the LCS piping will be remote-camera monitored at least once every 5 years. The frequency of clean-out and camera inspections may be modified based on consecutive inspection results and observed operating conditions. 2.3.2 LCS Record Keeping and Sampling Records will be maintained documenting the leachate line cleanout and camera monitoring. Untreated leachate shall be sampled and analyzed at least semi-annually concurrently with the groundwater water sampling. A grab sample will be obtained from the outlet of each leachate pipe, LP-1 through LP-6. The leachate must be analyzed for the same constituents as the groundwater monitoring wells in the approved Water Quality Monitoring Plan. The results must be submitted to NCDEQ Solid Waste with groundwater results. 2.3.3 Contingency Plan In the unlikely event that leachate cannot be drained to the West Ash Pond, leachate will be temporarily stored within the landfill until such time that draining operations to the West Ash Pond can be restored. In such an event, the Division shall be notified in writing, within 30 days, about the events and corrective actions taken. Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 11 of 17 March 6, 2017 2.4 Leak Detection System (LDS) The only phase that includes a leak detection system is Phase 6. The Roxboro Phase 6 LDS consists of a secondary 40 mil LLDPE liner system overlain by a secondary geocomposite drainage layer connected via HDPE piping to the LDS manhole. Flow collected in the manhole is transferred to Channel PC-2 via a LDS force main. Channel PC-2 drains to the West Ash Pond. The LDS has a proposed Initial Response Leakage Rate (IRLR) of a monthly average of 81.0 gallons per acre per day and an action leakage rate (ALR) of 140.9 gallons per acre per day. Should fluid collected in the LDS exceed the IRLR or ALR based on routine flow meter readings, the owner or operator shall take steps as indicated in the facility’s Response Action Plan presented in Section 2.3.6. The management of the leak detection system’s physical facilities (consisting of piping and flow meters) and records of monitoring will be performed by or under the direct supervision of Duke. The LDS manhole is equipped with a dedicated pneumatic pump system. The LDS manhole contains dual low-flow pumps (8 gallons per minute minimum pump capacity). The LDS pump system operates automatically based on level switches with a low level cutoff and a run level activation. Additionally, an audible high level alarm is activated by a high level condition. The high-level alarm, which is located on the side of the pump panel, will be tested for proper function periodically. This may require the use of a water truck to fill the manhole to the alarm activation level. The LDS pump system has one low-level pump and one high-level pump. See the table below for specific operatiing levels. Pump Low level cutoff High level run-start High level alarm activation Dual LDS Pumps Approx. 27 inches Approx. 39 inches Approx. 49 inches 2.4.1 LDS Maintenance The maintenance of the leachate management system’s physical facilities (consisting of high-density polyethylene (HDPE) piping, manhole, and pumps) and records will be performed by or under the direct supervision of Duke. Visual observations of the LDS system performance will be made monthly by Duke staff to verify that the LDS is performing properly. LDS pipes do not run the length of Phase 6. They extend only from the sump areas to the LDS manhole. Clean-out pipes are located on the LDS pipes. LDS pipes will be cleaned out by the use of a clean-out snake or high-pressure water flushing at least once a year, and the LDS piping will be remote-camera monitored at least once every 5 years. The frequency of clean-out and camera inspections may be modified based on consecutive inspection results and observed operating conditions. 2.4.2 Record Keeping and Monitoring Flow is measured at the discharge of the LDS manhole by a totalizing flow meter. The facility shall maintain records of monthly flow rate data from the LDS manhole from the initial date of waste placement and landfill operation until the Phase 6 waste thickness reaches an average of 40 feet. At the average 40- foot landfill stage, flow rate data shall be collected and evaluated on a quarterly basis until landfill unit closure. During the post-closure care period, semi-annual monitoring is required. If the liquid levels in the manhole stay below the pump run level (no pump flow) for more than 1 year, then flow rates can be recorded annually. However, if at any time during post-closure care the pump run level is exceeded on the semi-annual or annual schedules, the facility must return to monthly monitoring, until such time as the liquid level remains below the pump run level for two consecutive months. The purpose of LDS monitoring is to monitor leakage rates for comparison to established standards. Established standard leakage rate calculations for the 23.5 acre Phase 6 LDS area are attached and are defined in 2.4.3 Response Action Plan below. The leakage rates are defined as total gallons per month for the 23.5 acre unit. LDS flow data will be collected and totalized on a monthly basis for evaluation Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 12 of 17 March 6, 2017 according to the Response Action Plan. If a leakage rate is exceeded, then the Division must be notified as set forth in the Response Action Plan presented in Section 2.3.6. 2.4.3 Response Action Plan Initial Response Leakage Rate (IRLR) and/or the Action Leakage Rate (ALR) are exceeded. If the IRLR is exceeded, steps 1 through 4 will be followed. Should the ALR also be exceeded steps 1 through 6 will be followed. The IRLR and ALR are referenced collectively as “leakage rates” in the following response action plan steps and are defined as follows for the 23.5 acre Phase 6 LDS system: ► The IRLR is 57,105 gallons per 30-day month (81.0 gallons per acre per day), and; ► The ALR is 3,311 gallons per day (140.9 gallons per acre per day). The response action steps include: Step 1 (IRLR and ALR): ► Review physical equipment (pump and flow meter) function and data to confirm flow readings. Review operations to evaluate where operating equipment may have contacted the landfill liner or how landfill operations may have influenced the exceedance. If the exceedance is confirmed, the cell LDS flow shall be recorded daily. Should the daily monitored LDS flow exceed the IRLR or ALR after the initial exceedance, operational responses may include: the reduction of active face area; grading to provide improved drainage; and/or, the addition of interim soil cover. Step 2 (IRLR and ALR): ► Within 14 days of identifying that a leakage rate has been exceeded, the facility shall contact the Division in writing. Daily LDS flow recording shall continue. Should none of identification of the exceedance, monthly LDS flow averaging shall resume. Step 3 (IRLR and ALR): ► Within 30 days of identifying that a leakage rate has been exceeded, the facility shall submit to the Division a written preliminary assessment which shall include at a minimum: ► the amount of the liquid exceedance including initial measurement and daily measurements, if necessary, to date; ► likely sources of the liquids; ► the possible leak location; ► the possible leak size; ► the probable cause of the leak; and ► an outline of the short-term actions being taken and planned. Step 4 (IRLR and ALR): ► To the extent practicable, evaluate the location, size and cause of the leak; and assess the potential for leakage escaping into the environment and its mobility. Leachate quality shall be sampled, including a chemical analysis of LDS fluids, to evaluate potential hazards (pH and RCRA metals). Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 13 of 17 March 6, 2017 Step 5 (ALR Only): ► When the ALR is exceeded, establish whether or not the unit should be closed or receipt of waste should be curtailed; and conclude whether waste should be removed from the unit for inspection, engineered controls, or repair of the liner and drainage system. Evaluate and prepare to implement what other short-term or long-term measures shall be taken to mitigate or stop any leaks according to the stage (early operations, middle operations, or closed) of landfill development, as detailed in Section 2.3.5, the discussion on LDS flow measurement. Step 6 (ALR Only): ► Within 60 days of identifying that the ALR has been exceeded, submit to the Division the results of the evaluation performed in Step 4, any actions taken according to Step 5, and any further measures planned. For as long as there is an exceedance of the action leakage rate, the owner or operator shall submit monthly reports to the Division summarizing the results of the remedial actions taken and further actions planned. 2.5 Stormwater Collection and Conveyance Stormwater that does not come in contact with waste will be treated as non-contact water. Non-contact water will be managed separately from contact water and may be used for dust control or other operational purposes. The stormwater collection system has been designed to pass the 50-year, 24-hour storm event, and generally consists of the following components: ► Tack-on benches; ► Benches (on Phases 1-5); ► Downdrains; and ► Perimeter ditches. Intermediate cover will be placed over waste at the exterior side slopes. Tack-on benches will be placed to convey non-contact surface water from the exterior side slopes to downdrains. The tack-on benches and downdrains will be constructed and extended as operations progress. The downdrains discharge to perimeter ditches, which in turn ultimately discharge to the West Ash Pond via a system of culverts and channels, or to the Remnant East Ash Pond. 2.5.1 Stormwater Discharge The stormwater system at the landfill was designed to assist in prevention of the discharge of pollutants. Landfill operation shall not cause a discharge of pollutants into waters of the United States, including wetlands, that violates any requirement of the Clean Water Act, including but not limited to NPDES requirements, pursuant of Section 402. In addition, under the requirements of Section 404 of the Clean Water Act, the discharge of dredge or fill material into waters of the state would be a violation of the requirements and shall not be allowed by landfill operations. Operations of the landfill shall not cause the discharge of a non-point source of pollution to waters of the United States, including wetlands, that violates any requirements of an area-wide or statewide water quality management plan that has been approved under Section 208 or 319 of the Clean Water Act, as amended. Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 14 of 17 March 6, 2017 2.6 Landfill Gas Management Because the nature of the waste to be placed in the Roxboro Industrial Landfill, the Owner does not anticipate that methane or hydrogen sulfide will be generated or that odor will be an issue during operations. Therefore, landfill gas monitoring and management is not proposed. 3 Erosion and Sediment Control Erosion and sediment control (E&SC) during landfill operations will consist of monitoring and repairing E&SC stormwater conveyance features and surface erosion as defined in this Operations Plan and the active Erosion and Sediment Control Plan. 3.1 E&SC Measures Monitoring and Maintenance Erosion control principles include: ► Disturbing as little area as possible at any one time for landfilling operations. ► Seeding/mulching of disturbed areas commencing as soon as practically possible. Employing erosion control matting or seeding and mulch on steep slopes and other erosion prone areas; ► Use of earthen berms, hay bales, wattles, silt fences, riprap, or equivalent devices down gradient of disturbed areas, stockpiles, drainage pipe inlets and outlets, and at intervals along grassed waterways, until such time as permanent vegetation is established. ► Placement of riprap at the inlets and outlets of stormwater piping. Erosion and sedimentation control structures include stormwater best management practice (BMP) systems, settling basins, and channels. Stormwater BMP’s shall be inspected every 7 days and within 24 hours of rainfall events 0.5 inches or greater. Sediment shall be removed from each structure when sediment accumulates to one half of the design depth. Sediment removal shall bring BMP’s to their original design depth. The BMP’s, embankments, spillways and outlets shall also be observed for erosion damage. Necessary repairs shall be made immediately. Trash or debris within the riser structures or outfalls shall be removed. Channels shall be observed for damage every 7 days and within 24 hours of rainfall events 0.5 inches or greater. Riprap-lined channels and outlet protection aprons used to prevent damage to channel vegetation shall be observed for washouts. Riprap shall be added to those areas, as needed, to maintain the integrity of the structure. Embankment slopes shall be inspected for erosion every 7 days and within 24 hours of rainfall events 0.5 inches or greater. The embankment slopes shall be mowed at least three times a year. The embankment slopes shall be fertilized in the second year unless vegetation growth is fully adequate. Damaged areas shall be reseeded, fertilized and mulched immediately. Seeding, fertilizing, and mulching shall be in accordance with the North Carolina Erosion and Sedimentation Control Guidelines and in accordance with the active Erosion and Sediment Control Plan, provided in the Engineering Plan drawings. Ground stabilization shall be performed within 7 calendar days on perimeter areas and slopes greater than 3H:1V. Ground stabilization shall be performed within 14 calendar days in other areas. Seedbed preparation, seeding, soil amendments, and mulching for the establishment of vegetative ground cover will be applied in accordance with North Carolina Erosion and Sedimentation Control Guidelines. 3.2 Surface Erosion Monitoring Adequate erosion control measures shall be practiced to prevent sediment from leaving the site. Channels will be observed once every seven days and within 24 hours after any rainfall event of 0.5 inches or greater. Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 15 of 17 March 6, 2017 Slopes will be periodically checked for erosion and vegetative quality, fertilized, and mowed. A slope or portion thereof shall be identified as needing maintenance if it meets one of the following conditions: ► Exposed waste on exterior slopes; ► Areas of cracking, sliding, or sloughing; and ► Areas of seepage Slopes identified as needing maintenance shall be repaired as soon as practical and as appropriate to correct deficiencies. Repair activities may include re-dressing the slope, filling in low areas, and/or seeding. 4 Vegetation Management Within six months after final termination of disposal operations at the site, the area shall be stabilized with vegetation as required by the Closure and Post-Closure Plan, included in Appendix III. Temporary seeding will be applied as required. Temporary methods of erosion control may be required until vegetation is established. Mulching, until a vegetative cover is established, can stabilize areas where final grade has been reached. Soil mulching can be achieved using wood chips, straw, hay, asphalt emulsion, jute matting, and synthetic fibers. Mulches allow for greater water retention; reduce the amount of runoff; retain seeds, fertilizer, and lime in place; and improve soil moisture and temperature conditions. 4.1 Temporary Seeding Temporary seeding will be applied as follows or as required by the site’s vegetation management plan: SUMMER (May – August) Seeds Pounds Per Acre Millet (Browntop) 100 FALL, WINTER, SPRING (September – December, January - April) Soil Amendments Pounds Per Acre Agricultural limestone 2,000 Fertilizer (10-20-20) 400 Wheat Straw (See specified units) 3000-4000 Emulsified Asphalt 125-150 Gallons or Hydro Mulch 70/30 Blend to anchor wheat straw.300-500 Note: Soil amendments above are for temporary seeding and are applicable year round. Seeds Pounds Per Acre Rye (grain) 100 Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 16 of 17 March 6, 2017 4.2 Permanent Seeding Permanent Seeding will be applied as follows or as required by the site’s vegetation management plan: Seeds Pounds Per Acre Tall Fescue 100 Bahia Grass 35 Common Bermuda (hulled in warm season) 30 Ladino Clover 5 Nurse Crop See Below SUMMER (May – Aug) Nurse Crop Seed Pounds Per Acre Millet (Browntop) 3-5 FALL, WINTER, SPRING (September – December, January - April) Nurse Crop Seed Pounds Per Acre Rye (grain) 10-15 Soil Amendments Application Rate Lime Per soil test or 2 tons/ac Fertilizer (10-20-20) Per soil test or 500 lbs/ac Wheat Straw 1.5-2 tons/ac Emulsified Asphalt or Hydro Mulch 70/30 Blend 125-150 gal/ac or 300-500 lbs./acre Note: Perform soil test to determine proper soil amendments; if not available, use the quantities above. 4.3 Over-Seeding Over-seeding will be applied as follows: Jan – April Permanent Kentucky 31 Tall Fescue (50 lbs/ac) and Rye grain (25 lbs/ac) May – Aug Temporary Browntop Millet (25 lbs/ac) Sept - Dec Permanent Kentucky 31 Tall Fescue (50 lbs/ac) and Rye grain (25 lbs/ac) Note: Cut the existing turf to be over-seeded to an approximate 1-inch height. Aerate the soil and turf area to be over-seeded. Apply soil amendments pursuant to nutrient testing results. 5 Landfill Closure The Roxboro Industrial Landfill will be closed in accordance with the design drawings and Closure and Post-Closure Plan. The Closure and Post-Closure Plan outlines the sequence for closing the landfill and the post-closure maintenance activities. Closure is designed to minimize the need for long-term maintenance and control the post-closure release of contaminants. Closure activities may be revised as appropriate for materials, specifications, technology advancements, or changes in regulations at the time the landfill is closed or in post-closure. In general, the landfill development is designed so that final cover can be established as soon as practical. Landfill Operations Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810170864 Page 17 of 17 March 6, 2017 6 Required Regulatory Submittals Table 3 – Required Regulatory Submittals Submittal Requirement Reporting/Action Frequency Groundwater Monitoring Reports Maintain a record of all monitoring events and analytical data in accordance with the Water Quality Monitoring Plan. Reports of the analytical data for each water quality monitoring sampling event shall be submitted to DEQ Division of Waste Management (DWM) within 60 days of sampling event. Semiannually Dam Safety Report for Phases 1-5 In accordance with GS 143-215.29 and NCAC 15A-2K .0203, .0215, and .0212, the Engineer of Record shall submit each year a progress report indicating that construction is proceeding in accordance with approved plans. Annually Must be submitted no later than April 8 each year Annual Tonnage Reports Tons of waste received and disposed of in the landfill shall be reported to the DWM and to all counties from which waste was accepted on forms prescribed by the DWM. Refer to the Permit to Operate for annual reporting requirement information. Annually Must be submitted no later than August 1 each year 10-Year Waste Management Plan Per North Carolina G.S. 130A-309.09D (c): ► A 10-year waste management plan shall be developed for this landfill and submitted to DWM. ► The plan shall be updated and submitted to DWM at least every three years. ► A report on the implementation of the plan is required to be submitted to DWM by August 1 of each year. 10-year plan prepared every 10 years 10-year plan updated every 3 years Implementation report annually APPENDIX I Dust Control Plan Prepared For: Duke Energy Progress, LLC 526 S. Church St. Charlotte, NC 28202 Date October 15, 2015 Prepared By: Amec Foster Wheeler 2801 Yorkmont Rd., Charlotte, NC 28208 Dust Control Plan Roxboro Industrial Landfill (SW Permit No. 7302) Duke Energy Progress– Roxboro Steam Station Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Amec Foster Wheeler Project No. 7810150381 TOC October 15, 2015 Table of Contents 1 INTRODUCTION AND SITE DESCRIPTION ........................................................................................ 1 2 DUST CONTROL METHODS ............................................................................................................... 1 3 MONITORING AND CORRECTIVE ACTION RESPONSE .................................................................. 2 3.1 Monitoring ...................................................................................................................................... 2 3.2 Corrective Action Response .......................................................................................................... 2 Amec Foster Wheeler Project No. 7810150381 TOC October 15, 2015 List of Figures Figure 1 Landfill Operation Grid List of Appendices Appendix I Dust Monitoring Form Dust Control Plan Duke Energy – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Page 1 of 3 October 15, 2015 1 Introduction and Site Description This Dust Control Plan is for the Roxboro Industrial Landfill at Duke Energy’s Roxboro Steam Station. This Plan provides dust control methods for managing dust emissions at the landfill. The Plan also provides a monitoring program and corrective action responses to contain coal combustion residuals (CCR) on site and to prevent dust nuisances to employees and the public. The monitoring program will aid Duke Energy and the landfill operator in evaluating the dust control methods, or combination of dust control methods, that prove effective with site specific conditions. The Roxboro Industrial Landfill is principally used for CCR management. CCR predominantly consists of fly and bottom ash. Other acceptable wastes are listed in the Landfill Operations Plan. This Plan is included as an Appendix to the Landfill Operations Plan. Please refer to the Operations Plan for a description of revisions as necessary. 2 Dust Control Methods The primary potential source of dust emissions from the landfill is the active area of waste placement. This area is at a higher risk for producing dust due to exposed ash surfaces, vehicular and equipment traffic and earthworks such as dumping and spreading ash. Exterior landfill slopes are less of a dust control concern, as they have intermediate or operational soil cover which is vegetated as required in the Operations Plan. Dust emissions from the landfill can be controlled through a variety of dust control methods. Possible dust control methods are identified herein. Dust control methods may be characterized as products and/or applications, structural wind breaks and/or covers, and operational methods. Dust control methods for the landfill area include: ► Watering; ► Establishing vegetative cover; ► Mulching; ► Structural controls consisting of: ► Wind breaks (i.e. fencing and/or berms); and ► Temporary coverings (i.e. tarps); ► Spray applied dust suppressants consisting of, and not limited to: ► Anionic asphalt emulsion; ► Latex emulsion; ► Resin in water; ► Polymer based emulsion; and ► Mineral mortar coatings (i.e. posi-shell); ► Calcium chloride; ► Soil stabilizers (e.g. soil cement); ► Operational soil cover; ► Modifying the active working area; and ► Modifying operations during dry and windy conditions. The operator may use, and is not limited to, combinations of these dust control methods or any method that is technically sound to control dust for specific site conditions. If the operator intends to use a dust Dust Control Plan Duke Energy – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Page 2 of 3 October 15, 2015 control method not presented above, the proposed dust control method will be evaluated on a case by case basis to assess the effectiveness with specific site conditions. For the purposes of this Plan, operational soil cover will be defined as soil material applied at a suitable thickness to provide dust control. The effectiveness of the dust control methods implemented should be evaluated through a dust monitoring program outlined in Section 3. Operational equipment may consist of dump trucks, vibratory smooth drum rollers, sheepsfoot compactors, bulldozers, water trucks, spray trailers, track hoes, and service trucks. Operational equipment will be used to construct, install, apply, and/or repair dust control methods. The operator will make provisions to alleviate any on-site issues that arise when primary equipment is being maintained or is inoperable. In the event that the landfill site contains multiple facilities in the future, the landfill operator will make provisions to have the necessary equipment to control multiple fugitive CCR dust emission events. 3 Monitoring and Corrective Action Response This section describes the dust monitoring program and suggests corrective action responses should fugitive emissions be observed. 3.1 Monitoring During landfill operations, a dust monitoring program will be implemented to evaluate the performance of dust control measures. The dust monitoring program will consist of performing visual observations of dust prone areas, dust control measures, and monitoring existing and forecasted weather conditions. Dust emissions can occur under many conditions. For the purposes of this Plan, dust emissions are characterized as fugitive emissions, where CCR dust may be transported outside the limit of landfill waste. This is most likely to occur during windy, dry, and hot weather conditions. Therefore, the operator will monitor both existing and forecasted weather conditions and use dust control measures accordingly. The dust control measures shall be implemented prior to the forecasted weather conditions. Equipment operators shall continuously observe the active face and other areas within the landfill limit for dust emissions. In addition, preventative dust control measures should be observed and documented at least twice daily (morning and afternoon) when the landfill is in operation, to evaluate the dust control measure performance. Observations will be recorded using a form such as the one provided in Appendix I. Additional observations may be necessary as site and weather conditions dictate. Observations will be documented on the attached “Monitoring Worksheet,” or online database/worksheet, etc. Due to the frequent maintenance necessary on exposed ash areas (i.e., moisture conditioning or spray-application of dust suppressants), the operator shall pay particular attention to these areas. Structural controls shall be observed to monitor that they are achieving their intended purpose. Observations in the landfill area may be made with reference to the Operations Grid system shown in the attached Figure 1. Monitoring will be conducted during times when the landfill is in operation. The operator shall continue to provide necessary dust control measures during periods when operations are inactive (i.e. outages, weekends, and holidays). Operators are to establish appropriate measures so that dust emissions are not reasonably likely to occur during inactive operation periods when monitoring is not being conducted. 3.2 Corrective Action Response If fugitive dust emissions are observed and observations indicate dust control measures are not achieving their intended purpose, then appropriate corrective actions will be taken. Dust control measures should be reapplied, repaired, or added, as necessary, to control dust emissions. The operator will construct, Dust Control Plan Duke Energy – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Page 3 of 3 October 15, 2015 install, apply, and/or repair dust control measures prior to the end of the work day to control dust emissions during non-operating hours. The operator will implement dust control measures as preventative controls rather than in response to fugitive dust emissions. FIGURES APPENDIX I Dust Monitoring Form Ro x b o r o  In d u s t r i a l L a n d f i l l Pe r m i t  No .  73 0 2 Du s t  Co n t r o l  Mo n i t o r i n g  Fo r m Roxboro  Steam  Station Semora, North  Carolina We e k : Da t e / T i m e D u s t C o n t r o l M e t h o d i n U s e Ef f e c t i v e Ye s / N o Ob s e r v a t i o n Lo c a t i o n Pr e v e n t a t i v e o r Co r r e c t i v e Ac t i o n T a k e n Ye s / N o Ob s e r v a t i o n s / c o m m e n t s i n c l u d i n g : we a t h e r c o n d i t i o n s , w i n d s p e e d s , pr e c i p i t a t i o n , f o r e c a s e , p r e v e n t a t i v e o r co r r e t i v e a c t i o n s t a k e n ( i f n e e d e d ) , ad d i t i o n a l o p er a t i o n a l n o t e s Name of Observer APPENDIX II Engineering Drawings COVER SHEET C-0.0N IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 PE R M I T M O D I F I C A T I O N A P P L I C A T I O N RO X B O R O I N D U S T R I A L L A N D F I L L PH A S E 6 V E R T I C A L E X P A N S I O N SO L I D W A S T E P E R M I T 7 3 0 2 DU K E E N E R G Y - R O X B O R O S T E A M S T A T I O N PE R S O N C O U N T Y , N O R T H C A R O L I N A PR E P A R E D F O R : DU K E E N E R G Y P R O G R E S S , L L C RO X B O R O S T E A M S T A T I O N PE R S O N C O U N T Y PH A S E S 1 - 5 PH A S E S 1 - 5 PH A S E 6 NO T T O S C A L E PH A S E 6 Sheet List Table Sheet Number Sheet Title C-0.0 COVER SHEET C-1.1 EXISTING CONDITIONS C-1.2 PREVIOUSLY PERMITTED FACILITY PLAN C-1.3 FACILITY PLAN - PHASE 6 VERTICAL EXPANSION C-2.1 P O S T - S E T T L E M E N T B A S E G R A D E S A N D V E R T I C A L S E P A R A T I O N P L A N C-3.1 PHASE 6 CHIMNEY DRAIN PLAN C-3.2 PHASING PLAN - PHASE 6 TO TEMPORARY DECK C-3.3 PHASING PLAN - COMPLETION OF PHASES 1-5 C-4.1 VERTICAL EXPANSION FINAL GRADING AND DRAINAGE PLAN D-1.1 INTERIM COVER DETAILS D-1.2 INTERIM COVER DETAILS D-2.1 FINAL COVER DETAILS D-2.2 FINAL COVER DETAILS D-2.3 FINAL COVER DETAILS D-2.4 FINAL COVER DETAILS D-3.1 STORMWATER AND CHIMNEY DRAIN DETAILS D-4.1 EROSION CONTROL DETAILS X-1.1 CROSS SECTIONS PH A S E 6 CD 3 J CD 3 I CD 4 H CD 4 E CD 4 G CD 4 D CD 4 C CD 3 E CD 3 G CD 3 H CD 4 F CD 2 G CD 2 F CD 2 E CD 2 C CD 4 I CD 3 F CD 1 C CD 1 B CD1A CD2A CD 2 B CD 2 D CD3B CD 3 D CD3A CD 3 C CD4A CD 4 B PH A S E S 1 - 5 LIM I T O F P H A S E 6 L I N E R (REFERENCE 5) LIM I T O F P H A S E S 1 - 5 L I N E R (R E F E R E N C E 4 ) LIM I T O F M A P P I N G F R O M AP R I L 1 , 2 0 1 5 A E R I A L S U R V E Y (R E F E R E N C E 1 ) LP - 1 O U T L E T (8 " H D P E ) LP - 2 O U T L E T (8 " H D P E ) LP - 3 O U T L E T ( 8 " H D P E ) LP - 4 O U T L E T (8 " H D P E ) LP - 5 O U T L E T ( 8 " H D P E ) LP - 6 O U T L E T ( 1 0 " H D P E ) LD S OU T L E T (1 " P V C ) CO N D E N S A T E D I S C H A R G E (1 " P V C ) DP - 6 O U T L E T ( 2 4 " C P P ) DI- 6 LP - 3 C L E A N O U T ( 8 " H D P E ) 48 " C P P O U T F A L L DR O P I N L E T DP - 7 O U T L E T ( 1 8 " C P P ) DI- 9 A DI - 9 B TI- 9 C DP - 9 DP-1 TI - 1 B DP-2 DP-3TI-4C DP - 4 DP - 5 B DP - 5 A CO M P R E S S E D A I R P I P E (A P P R O X . L O C A T I O N ) CH A N N E L P C - 2 LE A K D E T E C T I O N S Y S T E M ( L D S ) PU M P S T A T I O N DISCHARGE CANAL NORTH RAMP WE S T R A M P CH A N N E L P C - 1 CR E S T O F E A S T A S H P O N D D A M AIR C O M P R E S S O R BU I L D I N G LP-1 CLEANOUT LP-2 CLEANOUT LP-3 CLEANOUT LP-4 CLEANOUT LP - 1 LP - 2 LP - 3 LP-4 CU L V E R T S U N D E R D U N N A W A Y R O A D (1 2 0 " R C P , T W O 3 0 " R C P ) AP P R O X I M A T E O U T E R L I M I T O F U N L I N E D M O N O F I L L AN D S U B G R A D E F I L L C O I N C I D E N T W I T H 19 8 8 P E R M I T T E D D I S P O S A L L I M I T S 19 8 8 P E R M I T T E D L I M I T O F I N D U S T R I A L L A N D F I L L AP P R O X I M A T E L I M I T O F EA S T A S H P O N D REMNANT EAST ASH POND DP - 6 DI- 5 A - A DI- 5 A - B LP 6 H E A D E R (1 0 " H D P E ) LP-5 CLEANOUT LP-6 CLEANOUT LP-7 CLEANOUT CL E A N O U T LP-7LP-6LP-5DI-3DI-3ADI-3B DI- 4 A DI- 4 B DI-2ADI-2B DI- 5 B - B DI- 7 B DI- 7 A DP - 7 CU L V E R T (1 8 " C P P ) DI- 8 A DI- 8 B DP - 8 CU L V E R T C - 1 ( 3 6 " C P P ) CU L V E R T C - 1 B LIMIT OF MAPPING FROM APRIL 1, 2015 AERIAL SURVEY (REFERENCE 1)LIMIT OF CURRENTLY PERMITTED PHASE 6B REDUNDANT LINERAPPROXIMATE LIMIT OF 2-FOOT THICK SOIL COVER 20 0 2 P E R M I T T E D L I M I T O F L C I D L A N D F I L L 50 F O O T B U F F E R PE R M I T T E D S O L I D W A S T E MA N A G E M E N T F A C I L I T Y BO U N D A R Y APPROXIMATE OUTER LIMIT OF UNLINED MONOFILL AND SUBGRADE FILL COINCIDENT WITH 1988 PERMITTED DISPOSAL LIMITS START OF COINCIDENT LINES ST A R T O F C O I N C I D E N T L I N E S EXISTING CONDITIONS C-1.1N RE F E R E N C E S 1. T O P O G R A P H Y I N P H A S E S 1 - 6 A R E A F R O M AP R I L 1 , 2 0 1 5 A E R I A L S U R V E Y B Y W S P WI T H F I E L D U P D A T E O F RE C O N S T R U C T E D I N T E R I M B E R M A R E A BY T W T C O M P L E T E D M A Y 3 0 , 2 0 1 5 . CO N T O U R S I N P H A S E 6 A R E T O P O F PR O T E C T I V E C O V E R E L E V A T I O N S . 2. O T H E R T O P O G R A P H Y F R O M A P R I L 1 6 , 20 1 4 A E R I A L S U R V E Y B Y W S P . 3. A L L M A P P I N G I S N . C . S T A T E P L A N E CO O R D I N A T E S N A D 8 3 ( 2 0 1 1 ) A N D N A V D 8 8 . 4. L I M I T O F P H A S E S 1 - 5 L I N E R L O C A T I O N OB T A I N E D F R O M D R A W I N G E N T I T L E D “F A C I L I T Y PL A N PH A S E 1-5 ” PR E P A R E D B Y BL A C K R O C K E N G I N E E R S D A T E D A U G U S T 16 , 2 0 1 3 , C O N V E R T E D T O N A D 8 3 / N A V D 8 8 . 5. L I M I T O F P H A S E 6 L I N E R L O C A T I O N OB T A I N E D F R O M D R A W I N G E N T I T L E D “R E C O R D SU R V E Y - T O P O F P R O T E C T I V E CO V E R - 0-7 0 2 1 ” PR E P A R E D B Y BL A C K R O C K E N G I N E E R S , D A T E D SE P T E M B E R 2 4 , 2 0 1 4 , C O N V E R T E D T O NA D 8 3 / N A V D 8 8 . 6. C H I M N E Y D R A I N S N O T S U R V E Y E D OB T A I N E D F R O M D R A W I N G E N T I T L E D “P H A S E 5 O P E R A T I O N S PL A N ” PR E P A R E D BY B L A C K R O C K E N G I N E E R S D A T E D DE C E M B E R 2 3 , 2 0 1 0 . EX I S T I N G C O M P R E S S E D A I R P I P E N 9 9 0 , 5 0 0 N 9 9 3 , 5 0 0 N 9 9 3 , 0 0 0 N 9 9 2 , 5 0 0 N 9 9 2 , 0 0 0 N 9 9 1 , 5 0 0 N 9 9 1 , 0 0 0 E 1,984,500 E 1,985,000 E 1 , 9 7 8 , 5 0 0 LE G E N D EX I S T I N G 1 0 ' C O N T O U R EX I S T I N G D O W N P I P E I N L E T 10 0 EX I S T I N G 2 ' C O N T O U R EX I S T I N G C H I M N E Y D R A I N EX I S T I N G D O W N P I P E O R C U L V E R T EX I S T I N G D R A I N A G E D I T C H EX I S T I N G L E A C H A T E C O L L E C T I O N P I P E EX I S T I N G C H I M N E Y D R A I N ( N O T S U R V E Y E D ) OU T E R L I M I T O F U N L I N E D M O N O F I L L AN D S U B G R A D E F I L L 19 8 8 P E R M I T T E D D I S P O S A L L I M I T S AP P R O X I M A T E L I M I T O F E A S T A S H P O N D IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 N 9 9 4 , 5 0 0 N 9 9 5 , 0 0 0 E 1,984,000 E 1,983,500 E 1,983,000 E 1,982,500 E 1 , 9 8 2 , 0 0 0 E 1 , 9 8 1 , 5 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 0 , 5 0 0 E 1 , 9 8 0 , 0 0 0 E 1 , 9 7 9 , 5 0 0 E 1 , 9 7 9 , 0 0 0 SU R V E Y C O N T R O L P O I N T LC I D L A N D F I L L L I M I T S EX I S T I N G R O A D LIM I T S O F L C I D L A N D F I L L PH A S E S 1 - 5 FI N A L C O V E R GR A D E S DUNNAW A Y R O A D WE S T R O A D (A C C E S S G A T E ) PL A N T E N T R A N C E (G U A R D H O U S E ) EA S T A S H PO N D D A M LA N D F I L L EN T R A N C E (T O S C A L E S ) SC A L E S NO R T H R A M P 1988 PERMITTED DISPOSAL LIMITSGMW-9 FU T U R E P H A S E S 19 8 8 DI S P O S A L L I M I T S HY D R O WS P # 3 DI S K 1 0 0 4 WS P # 5 LC I D A S B E S T O S MO N O F I L L ( P E R M I T 73 D - L C I D - 2 0 0 2 ) LIMIT OF PHASES 1 - 5 LINER (REFERENCE 4) GM W - 8 CH A R A H 1 GM W - 1 0 GM W - 6 NO R T H BO R R O W A R E A GM W - 7 PZ - 1 4 PZ-12 PH A S E 6 FI N A L C O V E R GR A D E S 50' BUFFER LINE SOLID WASTE PERMIT 73-02 PROPERTY LIMITLIMIT OF PHASE 6 LINER (REFERENCE 5)LIMIT OF CURRENTLY PERMITTED PHASE 6B (SEE NOTE 3)PREVIOUSLY PERMITTED FACILITY PLAN C-1.2N RE F E R E N C E S 1. D E S I G N T O P O G R A P H Y S H O W N W I T H I N PH A S E S 1 - 6 I S R E P R E S E N T A T I V E O F PR O P O S E D F I N A L C O V E R G R A D E S PR E P A R E D B Y A M E C F O S T E R W H E E L E R . 2. E X I S T I N G T O P O G R A P H Y S H O W N O U T S I D E OF P H A S E S 1 - 6 I S F R O M A P R I L 1 6 , 2 0 1 4 AE R I A L S U R V E Y B Y W S P . 3. A L L M A P P I N G I S N . C . S T A T E P L A N E CO O R D I N A T E S N A D 8 3 A N D N A V D 8 8 . 4. L I M I T O F P H A S E S 1 - 5 L I N E R L O C A T I O N OB T A I N E D F R O M D R A W I N G E N T I T L E D “F A C I L I T Y P L A N P H A S E 1 - 5 ” P R E P A R E D B Y BL A C K R O C K E N G I N E E R S D A T E D A U G U S T 1 6 , 20 1 3 , C O N V E R T E D T O N A D 8 3 / N A V D 8 8 . 5. L I M I T O F P H A S E 6 L I N E R L O C A T I O N OB T A I N E D F R O M D R A W I N G E N T I T L E D “R E C O R D S U R V E Y - T O P O F P R O T E C T I V E CO V E R - 0 - 7 0 2 1 ” P R E P A R E D B Y B L A C K R O C K EN G I N E E R S , D A T E D S E P T E M B E R 2 4 , 2 0 1 4 , CO N V E R T E D T O N A D 8 3 / N A V D 8 8 . N 9 9 0 , 5 0 0 N 9 9 3 , 5 0 0 N 9 9 3 , 0 0 0 N 9 9 2 , 5 0 0 N 9 9 2 , 0 0 0 N 9 9 1 , 5 0 0 N 9 9 1 , 0 0 0 E 1,984,500E 1,985,000 LE G E N D N 9 9 4 , 5 0 0 N 9 9 5 , 0 0 0 E 1,984,000 E 1,983,500 E 1 , 9 8 3 , 0 0 0 E 1 , 9 8 2 , 5 0 0 E 1 , 9 8 2 , 0 0 0 E 1 , 9 8 1 , 5 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 0 , 5 0 0 E 1 , 9 8 0 , 0 0 0 E 1 , 9 7 9 , 5 0 0 E 1 , 9 7 8 , 5 0 0 NO T E S 1. T H E 1 9 8 8 P E R M I T T E D L A N D F I L L C A P A C I T Y I N C L U D I N G FIN A L C O V E R I S 1 7 , 3 5 6 , 6 8 0 C Y B A S E D O N D R A W I N G EN T I T L E D " 1 9 8 8 A P P R O V E D C A P A C I T Y P L A N " , PR E P A R E D B Y B L A C K R O C K E N G I N E E R S , D A T E D AU G U S T 1 5 , 2 0 1 3 . 2. P H A S E 6 I S M O N I T O R E D B Y T H E L E A K D E T E C T I O N SY S T E M . 3. T H E P R E V I O U S L Y P E R M I T T E D R E D U N D A N T P H A S E 6 B OV E R L A Y L I N E R H A S B E E N R E M O V E D F R O M T H E DE S I G N A N D W I L L N O T B E C O N S T R U C T E D . EX I S T I N G 1 0 ' C O N T O U R EX I S T I N G 2 ' C O N T O U R 19 8 8 P E R M I T T E D D I S P O S A L L I M I T S PH A S E 6 - L I N E R L I M I T PH A S E S 1 - 5 - L I N E R L I M I T GR O U N D W A T E R M O N I T O R I N G W E L L - PH A S E S 1 - 5 ( S E E N O T E 2 ) PIE Z O M E T E R I N M O N I T O R I N G N E T W O R K SU R V E Y C O N T R O L P O I N T PR O P O S E D 1 0 ' C O N T O U R PR O P O S E D 2 ' C O N T O U R GM W - 1 SU R V E Y C O N T R O L P O I N T S - N A D 8 3 ( 2 0 1 1 ) / N A V D 8 8 PO I N T A L I A S LO C A L N O R T H I N G LO C A L E A S T I N G HY D R O 99 3 , 3 1 7 . 4 5 0 0 1,9 7 8 , 7 3 5 . 5 6 0 0 CH A R A H 1 99 3 , 8 3 1 . 8 8 0 0 1,9 8 1 , 0 0 3 . 9 8 0 0 WS P # 3 99 3 , 0 1 7 . 9 6 0 0 1,9 8 0 , 0 7 4 . 9 3 0 0 DIS K 1 0 0 4 99 4 , 6 7 3 . 8 0 0 0 1,9 7 9 , 7 7 2 . 9 3 0 0 WS P # 5 99 2 , 8 2 7 . 7 7 0 0 1,9 7 9 , 1 8 1 . 2 0 0 0 WS P # 4 99 1 , 5 6 9 . 5 5 0 0 1,9 8 2 , 8 1 3 . 8 1 0 0 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 50 0 PZ - 1 2 N 9 9 4 , 0 0 0 N 9 9 0 , 0 0 0 E 1 , 9 7 9 , 0 0 0 E 1,985,500 E 1,986,600 PH A S E S 1 - 5 FI N A L C O V E R GR A D E S DUNNAW A Y R O A D WE S T R O A D (A C C E S S G A T E ) PL A N T E N T R A N C E (G U A R D H O U S E ) EA S T A S H PO N D D A M LA N D F I L L EN T R A N C E (T O S C A L E S ) SC A L E S NO R T H R A M P 1988 PERMITTED DISPOSAL LIMITSGMW-9 FU T U R E P H A S E S 19 8 8 DI S P O S A L L I M I T S HY D R O WS P # 3 DI S K 1 0 0 4 WS P # 5 LC I D A S B E S T O S MO N O F I L L ( P E R M I T 73 D - L C I D - 2 0 0 2 ) LIMIT OF PHASES 1 - 5 LINER (REFERENCE 4) GM W - 8 CH A R A H 1 GM W - 1 0 GM W - 6 NO R T H BO R R O W A R E A GM W - 7 PZ - 1 4 PZ-12 PH A S E 6 FI N A L C O V E R GR A D E S 50' BUFFER LINE SOLID WASTE PERMIT 73-02 PROPERTY LIMITLIMIT OF PHASE 6 LINER (REFERENCE 5)FACILITY PLAN - PHASE 6 VERTICAL EXPANSION C-1.3N RE F E R E N C E S 1. D E S I G N T O P O G R A P H Y S H O W N W I T H I N PH A S E S 1 - 6 I S R E P R E S E N T A T I V E O F PR O P O S E D F I N A L C O V E R G R A D E S PR E P A R E D B Y A M E C F O S T E R W H E E L E R . 2. E X I S T I N G T O P O G R A P H Y S H O W N O U T S I D E OF P H A S E S 1 - 6 I S F R O M A P R I L 1 6 , 2 0 1 4 AE R I A L S U R V E Y B Y W S P . 3. A L L M A P P I N G I S N . C . S T A T E P L A N E CO O R D I N A T E S N A D 8 3 A N D N A V D 8 8 . 4. L I M I T O F P H A S E S 1 - 5 L I N E R L O C A T I O N OB T A I N E D F R O M D R A W I N G E N T I T L E D “F A C I L I T Y P L A N P H A S E 1 - 5 ” P R E P A R E D B Y BL A C K R O C K E N G I N E E R S D A T E D A U G U S T 1 6 , 20 1 3 , C O N V E R T E D T O N A D 8 3 / N A V D 8 8 . 5. L I M I T O F P H A S E 6 L I N E R L O C A T I O N OB T A I N E D F R O M D R A W I N G E N T I T L E D “R E C O R D S U R V E Y - T O P O F P R O T E C T I V E CO V E R - 0 - 7 0 2 1 ” P R E P A R E D B Y B L A C K R O C K EN G I N E E R S , D A T E D S E P T E M B E R 2 4 , 2 0 1 4 , CO N V E R T E D T O N A D 8 3 / N A V D 8 8 . N 9 9 0 , 5 0 0 N 9 9 3 , 5 0 0 N 9 9 3 , 0 0 0 N 9 9 2 , 5 0 0 N 9 9 2 , 0 0 0 N 9 9 1 , 5 0 0 N 9 9 1 , 0 0 0 E 1,984,500E 1,985,000 LE G E N D N 9 9 4 , 5 0 0 N 9 9 5 , 0 0 0 E 1,984,000 E 1,983,500 E 1 , 9 8 3 , 0 0 0 E 1 , 9 8 2 , 5 0 0 E 1 , 9 8 2 , 0 0 0 E 1 , 9 8 1 , 5 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 0 , 5 0 0 E 1 , 9 8 0 , 0 0 0 E 1 , 9 7 9 , 5 0 0 E 1 , 9 7 8 , 5 0 0 NO T E S 1. T H E 1 9 8 8 P E R M I T T E D L A N D F I L L C A P A C I T Y I N C L U D I N G FIN A L C O V E R I S 1 7 , 3 5 6 , 6 8 0 C Y B A S E D O N D R A W I N G EN T I T L E D " 1 9 8 8 A P P R O V E D C A P A C I T Y P L A N " , PR E P A R E D B Y B L A C K R O C K E N G I N E E R S , D A T E D AU G U S T 1 5 , 2 0 1 3 . 2. T H E L A N D F I L L U T I L I Z A T I O N F R O M E S T I M A T E D PR E - 1 9 8 8 G R O U N D S U R F A C E ( A S S U M I N G T H E E A S T AS H P O N D W A S F I L L E D T O E L E V A T I O N 4 6 9 F T ) T O T H E PR O P O S E D F I N A L C O V E R G R A D E S F O R P H A S E S 1 - 6 (IN C L U D I N G V E R T I C A L E X P A N S I O N ) I S 1 6 , 2 0 0 , 0 0 0 C Y . 3. P H A S E 6 I S M O N I T O R E D B Y T H E L E A K D E T E C T I O N SY S T E M . 4. T H E P R E V I O U S L Y P E R M I T T E D R E D U N D A N T P H A S E 6 B OV E R L A Y L I N E R H A S B E E N R E M O V E D F R O M T H E DE S I G N A N D W I L L N O T B E C O N S T R U C T E D . EX I S T I N G 1 0 ' C O N T O U R EX I S T I N G 2 ' C O N T O U R 19 8 8 P E R M I T T E D D I S P O S A L L I M I T S PH A S E 6 - L I N E R L I M I T PH A S E S 1 - 5 - L I N E R L I M I T GR O U N D W A T E R M O N I T O R I N G W E L L - PH A S E S 1 - 5 ( S E E N O T E 3 ) PIE Z O M E T E R I N M O N I T O R I N G N E T W O R K SU R V E Y C O N T R O L P O I N T PR O P O S E D 1 0 ' C O N T O U R PR O P O S E D 2 ' C O N T O U R GM W - 1 SU R V E Y C O N T R O L P O I N T S - N A D 8 3 ( 2 0 1 1 ) / N A V D 8 8 PO I N T A L I A S LO C A L N O R T H I N G LO C A L E A S T I N G HY D R O 99 3 , 3 1 7 . 4 5 0 0 1,9 7 8 , 7 3 5 . 5 6 0 0 CH A R A H 1 99 3 , 8 3 1 . 8 8 0 0 1,9 8 1 , 0 0 3 . 9 8 0 0 WS P # 3 99 3 , 0 1 7 . 9 6 0 0 1,9 8 0 , 0 7 4 . 9 3 0 0 DIS K 1 0 0 4 99 4 , 6 7 3 . 8 0 0 0 1,9 7 9 , 7 7 2 . 9 3 0 0 WS P # 5 99 2 , 8 2 7 . 7 7 0 0 1,9 7 9 , 1 8 1 . 2 0 0 0 WS P # 4 99 1 , 5 6 9 . 5 5 0 0 1,9 8 2 , 8 1 3 . 8 1 0 0 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 50 0 PZ - 1 2 N 9 9 4 , 0 0 0 N 9 9 0 , 0 0 0 E 1 , 9 7 9 , 0 0 0 E 1,985,500 E 1,986,600 INV.: 535.4' ± IN V . : 5 2 8 . 0 ' ± IN V . : 5 2 8 . 5 ' ± IN V . : 5 4 0 . 9 ' ± INV.: 547.8' ±INV.: 553.2' ±INV.: 555.3' ± IN V . : 5 3 5 . 9 ' ± INV.: 543.5' ±INV.: 545.5' ± IN V . : 5 2 3 . 9 ' ± INV.: 541.9' ± IN V . : 5 2 8 . 5 ' ± 4 8 0 4 8 5 500 4 9 0 48 5 48 0 47 5 4 8 5 4 8 0 4 7 5 4 9 0 475 480 485 490 495 500 505 510 PH A S E 4 LIM I T O F M A P P I N G FR O M A P R I L 1 , 2 0 1 5 AE R I A L S U R V E Y (R E F E R E N C E 1 ) LIM I T O F P H A S E S 1 - 5 L I N E R (R E F E R E N C E 3 ) LIM I T O F PH A S E 6 LIN E R PH A S E 2 PH A S E 5 4 7 0 4 7 5 4 8 0 480 475 LIM I T O F P H A S E 6 F L O O R A R E A (S E E N O T E 2 ) 470 PH A S E 3 PHASE 6 POST-SETTLEMENT BASE GRADES AND VERTICAL SEPARATION PLAN C-2.1N IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 E 1 , 9 8 0 , 4 0 0 E 1 , 9 8 0 , 6 0 0 E 1 , 9 8 0 , 8 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 1 , 2 0 0 E 1 , 9 8 1 , 4 0 0 E 1 , 9 8 1 , 6 0 0 E 1 , 9 8 1 , 8 0 0 E 1 , 9 8 2 , 0 0 0 E 1 , 9 8 2 , 2 0 0 E 1,982,400 E 1,982,600 E 1,982,800E 1,983,000 E 1,983,200N 993,200 N 993,000 N 992,800 N 992,600 E 1 , 9 8 0 , 4 0 0 E 1 , 9 8 0 , 6 0 0 E 1 , 9 8 0 , 8 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 1 , 4 0 0 E 1 , 9 8 1 , 6 0 0 E 1 , 9 8 1 , 8 0 0 E 1 , 9 8 2 , 0 0 0 E 1 , 9 8 2 , 2 0 0 E 1,982,400 E 1,982,600 E 1,982,800 E 1,983,000 E 1,983,400E 1,983,200 E 1,983,400 E 1 , 9 8 1 , 2 0 0 N 992,400 N 992,200 N 992,000 N 991,800 N 991,600 N 9 9 3 , 2 0 0 N 9 9 3 , 0 0 0 N 9 9 2 , 8 0 0 N 9 9 2 , 6 0 0 N 9 9 2 , 4 0 0 N 9 9 2 , 2 0 0 N 9 9 2 , 0 0 0 N 9 9 1 , 8 0 0 N 9 9 1 , 6 0 0 RE F E R E N C E S 1. T O P O G R A P H Y B E Y O N D L I M I T S O F L A N D F I L L L I N E R F R O M A P R I L 1 , 2 0 1 5 A E R I A L S U R V E Y BY W S P . 2. A L L M A P P I N G I S N . C . S T A T E P L A N E C O O R D I N A T E S N A D 8 3 ( 2 0 1 1 ) A N D N A V D 8 8 . 3. L I M I T O F P H A S E S 1 - 5 L I N E R L O C A T I O N O B T A I N E D F R O M D R A W I N G E N T I T L E D " F A C I L I T Y PL A N P H A S E 1 - 5 " P R E P A R E D B Y B L A C K R O C K E N G I N E E R S D A T E D A U G U S T 1 6 , 2 0 1 3 CO N V E R T E D T O N A D 8 3 / N A V D 8 8 . 4. L I M I T O F P H A S E 6 L I N E R L O C A T I O N O B T A I N E D F R O M D R A W I N G E N T I T L E D " R E C O R D SU R V E Y - T O P O F P R O T E C T I V E C O V E R 0 - 7 0 2 1 " P R E P A R E D B Y B L A C K R O C K E N G I N E E R S DA T E D S E P T E M B E R 2 4 2 0 1 4 , C O N V E R T E D T O N A D 8 3 / N A V D 8 8 . 5. D E S I G N B A S E G R A D E S F O R P H A S E S 1 - 5 A R E A O B T A I N E D F R O M D R A W I N G E N T I T L E D “B A S E G R A D I N G P L A N ” P R E P A R E D B Y G A R Y W . A H L B E R G , P . E . , D A T E D M A Y 1 7 , 2 0 0 2 , CO N V E R T E D T O N A D 8 3 / N A V D 8 8 . 6. D E S I G N S U B G R A D E S F O R P H A S E 6 O B T A I N E D F R O M D R A W I N G E N T I T L E D " G R A D I N G P L A N SO I L L I N E R S U B G R A D E 0 - 7 0 2 1 " P R E P A R E D B Y B L A C K R O C K E N G I N E E R S , I N C . , D A T E D 10 / 0 9 / 2 0 1 4 , A N D C O N V E R T E D F R O M N G V D 2 9 T O N A V D 8 8 . 7. S E A S O N A L H I G H G R O U N D W A T E R C O N T O U R S O B T A I N E D F R O M D R A W I N G G 2 E N T I T L E D , "S E A S O N A L H I G H P O T E N T I O M E T R I C M A P " , P R E P A R E D B Y B L A C K R O C K E N G I N E E R S , I N C . , DA T E D 8 / 1 6 / 2 0 1 3 A N D C O N V E R T E D F R O M N G V D 2 9 T O N A V D 8 8 . LE G E N D EX I S T I N G 1 0 ' C O N T O U R (S E E N O T E 1 ) BA S E G R A D E M A J O R C O N T O U R BA S E G R A D E M I N O R C O N T O U R EX I S T I N G 2 ' C O N T O U R ( S E E NO T E 1 ) EX I S T I N G D R A I N A G E D I T C H SE A S O N A L H I G H GR O U N D W A T E R C O N T O U R (S E E R E F E R E N C E 7 ) PO S T S E T T L E M E N T 2 ' C O N T O U R 50 0 NO T E S : 1. D E S I G N B A S E G R A D E S R E P R E S E N T D E S I G N E L E V A T I O N O F S U B G R A D E . I N P H A S E S 2 , 3 , 4 , AN D 5 , G E O M E M B R A N E L I N E R W A S P L A C E D O N S U B G R A D E . I N P H A S E 6 , T H E C O M P A C T E D CL A Y L I N E R W A S C O N S T R U C T E D O N S U B G R A D E . 2. T H E P H A S E 6 F L O O R A R E A I S B O U N D E D O N T H E N O R T H B Y L E A C H A T E C O L L E C T I O N P I P E LP - 5 . F R O M T H E R E , T H E P H A S E 6 L I N E R E X T E N D S T O T H E N O R T H S L O P I N G U P W A R D A N D OV E R L A P P I N G T H E P H A S E S 1 - 5 L I N E R . T H E U P W A R D S L O P I N G A N D O V E R L A P P I N G A R E A I S NO T S H O W N F O R T H E P U R P O S E S O F T H I S D R A W I N G . 3. T H E P O S T - S E T T L E M E N T V E R T I C A L S E P A R A T I O N B E T W E E N S E A S O N A L H I G H GR O U N D W A T E R C O N T O U R S A N D E S T I M A T E D P O S T - S E T T L E M E N T S U B G R A D E E L E V A T I O N S EX C E E D S 5 F E E T A T A L L L O C A T I O N S . CD 3 J CD 3 I CD 4 H CD 4 G CD 4 E CD 4 D CD 4 C CD 3 F CD 3 E CD 3 G CD 3 H CD 4 F CD3A CD 3 C CD4A CD 4 B CD 4 I DP - 7 DP - 6 (2 4 " C P P ) 18 " C P P 8" H D P E DI- 7 A DR O P I N L E T DP - 5 B (1 8 " C P P ) DP - 5 A (1 8 " C P P ) LIM I T O F P H A S E 6 L I N E R (R E F E R E N C E 4 ) LIM I T O F PH A S E S 1 - 5 L I N E R (R E F E R E N C E 3 ) EX I S T I N G C H A N N E L P C - 2 TO E O F P H A S E 6 WA S T E S L O P E TOE OF PHASE 6 WASTE SLOPE IN T E R I M P E R I M E T E R CH A N N E L LI M I T O F P H A S E 6 L I N E R (R E F E R E N C E 4 ) LIMIT OF PHASE 6 LINER (REFERENCE 4) TI- 4 C DP-3 (18" CPP) DP - 4 (1 8 " C P P ) CD-6I CD - 6 E CD - 6 B CD - 6 F CD-6H INV.: 553.2' ± CD - 6 G CD-6K WYE-03 CHIMNEY DRAIN INLINE (TYP.) CD - 6 D 8" H D P E 8" H D P E 8" H D P E 8" H D P E 8" HDPE 8" HDPE 8" H D P E 8" HD P E 8" HDPE8" HDPECD-6LCD-6M LP - 6 L E A C H A T E FL O W G A U G E B O X LP - 6 ( 1 0 " H D P E ) TH R E E 2 4 " CP P C U L V E R T S LD S M H LP - 5 L E A C H A T E FL O W G A U G E B O X DO W N P I P E D P - 4 (1 8 " C P P ) CH I M N E Y D R A I N OU T L E T LP - 6 (8 " H D P E ) LP-7 (8" HDPE) LP - 7 A ( 8 " H D P E ) RI P R A P C H A N N E L L I N I N G RIP R A P C H A N N E L L I N I N G TE M P O R A R Y H A U L R O A D RE M O V E T E M P O R A R Y CU L V E R T T C - 6 WYE-05CD-6J CD - 6 C CD - 6 A IN T E R I M BE R M 537 5 3 7 5 3 0 . 5 5 3 0 . 5 542.5547.5 554.2559.2 DI- 7 B DI-3B DI-3A DI-3 DI- 5 B - B DP - 7 ( 1 8 " C P P ) DI- 5 A - A DI- 4 A DI - 4 B CD-6N 48 " C P P 8" HDP E 8" HDPE 8" HDPE 8" HDPE CHIMNEY DRAIN END OF LINE (TYP.)2 D-3.1 LP - 5 ( 8 " H D P E ) 12" H D P E 12 " H D P E 1 D-3.1EAST BERM WITH INITIAL GRADES1 D-1.1 PHASE 6 CHIMNEY DRAIN PLAN C-3.1N IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 E 1 , 9 8 0 , 4 0 0 E 1 , 9 8 0 , 6 0 0 E 1 , 9 8 0 , 8 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 1 , 2 0 0 E 1 , 9 8 1 , 4 0 0 E 1 , 9 8 1 , 6 0 0 E 1 , 9 8 1 , 8 0 0 E 1 , 9 8 2 , 0 0 0 E 1 , 9 8 2 , 2 0 0 E 1,982,400 E 1,982,600 E 1,982,800E 1,983,000 E 1,983,200N 993,200 N 993,000 N 992,800 N 992,600 E 1 , 9 8 0 , 4 0 0 E 1 , 9 8 0 , 6 0 0 E 1 , 9 8 0 , 8 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 1 , 4 0 0 E 1 , 9 8 1 , 6 0 0 E 1 , 9 8 1 , 8 0 0 E 1 , 9 8 2 , 0 0 0 E 1 , 9 8 2 , 2 0 0 E 1,982,400 E 1,982,600 E 1,982,800 E 1,983,000 E 1,983,400E 1,983,200 E 1,983,400 E 1 , 9 8 1 , 2 0 0 N 992,400 N 992,200 N 992,000 N 991,800 N 991,600 N 9 9 3 , 2 0 0 N 9 9 3 , 0 0 0 N 9 9 2 , 8 0 0 N 9 9 2 , 6 0 0 N 9 9 2 , 4 0 0 N 9 9 2 , 2 0 0 N 9 9 2 , 0 0 0 N 9 9 1 , 8 0 0 N 9 9 1 , 6 0 0 RE F E R E N C E S 1. T O P O G R A P H Y F R O M A P R I L 1 , 2 0 1 5 AE R I A L S U R V E Y B Y W S P . 2. A L L M A P P I N G I S N . C . S T A T E P L A N E CO O R D I N A T E S N A D 8 3 ( 2 0 1 1 ) A N D N A V D 8 8 . 3. L I M I T O F P H A S E S 1 - 5 L I N E R L O C A T I O N OB T A I N E D F R O M D R A W I N G E N T I T L E D “F A C I L I T Y P L A N P H A S E 1 - 5 ” P R E P A R E D B Y BL A C K R O C K E N G I N E E R S D A T E D A U G U S T 16 , 2 0 1 3 , C O N V E R T E D T O N A D 8 3 / N A V D 8 8 . 4. L I M I T O F P H A S E 6 L I N E R L O C A T I O N OB T A I N E D F R O M D R A W I N G E N T I T L E D “R E C O R D S U R V E Y - T O P O F P R O T E C T I V E CO V E R - 0 - 7 0 2 1 ” P R E P A R E D B Y BL A C K R O C K E N G I N E E R S , D A T E D SE P T E M B E R 2 4 , 2 0 1 4 , C O N V E R T E D T O NA D 8 3 / N A V D 8 8 . LE G E N D EX I S T I N G 1 0 ' C O N T O U R PR O P O S E D 1 0 ' C O N T O U R (T O P O F W A S T E ) ( S E E N O T E 1 ) PR O P O S E D 2 ' C O N T O U R (T O P O F W A S T E ) ( S E E N O T E 1 ) EX I S T I N G D O W N P I P E I N L E T 10 0 EX I S T I N G 2 ' C O N T O U R EX I S T I N G C H I M N E Y D R A I N 10 0 EX I S T I N G D O W N P I P E OR C U L V E R T EX I S T I N G D R A I N A G E D I T C H PR O P O S E D C H I M N E Y D R A I N PR O P O S E D D O W N P I P E EX I S T I N G R I P R A P PR O P O S E D R I P R A P 3 D- 4 . 1 3 D- 4 . 1 NO T E S : 1. T O P O F W A S T E G R A D E S S H O W N I N P H A S E 6 AR E I L L U S T R A T I V E O F A P O S S I B L E I N T E R I M CO N D I T I O N A N D S H O W A D R A I N A G E PA T T E R N D E S I G N E D T O P R O V I D E TE M P O R A R Y C O N T A I N M E N T F O R R U N O F F FR O M A 5 0 - Y E A R 2 4 - H O U R D E S I G N S T O R M AN D T O D I R E C T R U N O F F T O C H I M N E Y DR A I N S . A C T U A L I N T E R I M C O N D I T I O N S W I L L CH A N G E C O N T I N U O U S L Y A S P H A S E 6 I S FI L L E D . I N T E R M E D I A T E C O V E R , N O T S H O W N ON T H I S D R A W I N G , W I L L B E P L A C E D O N OU T E R S L O P E S . 2. I N T E R I M G R A D E S W I L L T Y P I C A L L Y P R O V I D E FO R C O N T A I N M E N T O F S T O R M W A T E R T O A 4- F O O T D E P T H R E L A T I V E T O T H E S U R F A C E EL E V A T I O N A T E A C H C H I M N E Y D R A I N . T H E DR A I N A G E A R E A T O E A C H C H I M N E Y D R A I N WI L L T Y P I C A L L Y B E L I M I T E D T O 1 . 7 5 A C R E S . 3. C H I M N E Y D R A I N L O C A T I O N S A R E AP P R O X I M A T E A N D M A Y B E A D J U S T E D W I T H OW N E R ' S A P P R O V A L . EX I S T I N G R I P R A P CH A N N E L P C - 1 CH A N N E L P C - 2 D P - 1 4 DP-13 DP-12DP-11DP-10DP-2A E 1,983,000 E 1,982,500 E 1,982,000 E 1 , 9 8 1 , 5 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 0 , 5 0 0 N 9 9 4 , 0 0 0 N 9 9 3 , 5 0 0 N 9 9 3 , 0 0 0 N 9 9 2 , 5 0 0 N 9 9 2 , 0 0 0 N 9 9 1 , 5 0 0 PHASE 6 LINER LIMIT PHASES 1-5 LINER LIMIT LIM I T O F P H A S E S 1 - 5 LIN E R ( R E F E R E N C E 4 ) LIM I T O F P H A S E 6 LIN E R ( R E F E R E N C E 5 ) PHASES 1 - 5 (CURRENTLY FILLED TO APPROX. ELEV. 604 FT.)NORTH RAMP PHASE 6INV.: 535.4' ±INV.: 528.0' ±INV.: 528.5' ±INV.: 540.9' ±INV.: 547.8' ±INV.: 553.2' ±INV.: 555.3' ±INV.: 535.9' ±INV.: 543.5' ±INV.: 545.5' ±INV.: 523.9' ±INV.: 541.9' ±INV.: 528.5' ± WY E - 0 1 IN V . : 5 2 1 . 9 ' ± WYE-02 INV.: 530.7' ±WYE-04 INV.: 523.4' ±WYE-05 INV.: 539.1' ±WYE-03 INV.: 536.3' ±CD-6BCD-6CCD-6ACD-6D CD-6F CD-6ECD-6I CD-6HCD-6J CD-6LCD-6MCD-6K CD-6G SO U T H B E R M W I T H I N T E R I M C O V E R S Y S T E M EAST BERM WITH INTERIM COVER SYSTEM 3 D-1.12D-1.1 IN T E R I M C O V E R T A C K - O N B E N C H T I E - I N T O D O W N P I P E 1 D- 1 . 2 INTERIM COVER TACK-ON BENCH3 D-1.2 IN T E R I M C O V E R D O W N P I P E ( T Y P . ) 5 D-1 . 2 CD 3 J CD 3 I CD 4 H CD 4 G CD 4 I CD 4 E CD 4 D CD4C CD 3 F CD3E CD 3 G CD 3 H CD 4 F CD 2 G CD 2 F CD 2 E CD2CCD1CCD1BCD1ACD2A CD2B CD 2 D CD3B CD3D CD3A CD3C CD4A CD4BCD1CCD1BCD1ACD2ACD2B CD 2 D CD3BCD3D CD3A CD3C CD4A CD4BRIPRAP RIP R A P RIPRAP OUTLET PROTECTION (TYP.)2 D-4.1 CO N C R E T E E N E R G Y DIS S I P A T O R EN E R G Y D I S S I P A T O R A N D HE A D W A L L A T T R I P L E C U L V E R T 3 D- 3 . 1 PHASING PLAN - PHASE 6 TO TEMPORARY DECK C-3.2N IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 EX I S T I N G C H I M N E Y D R A I N RE F E R E N C E S 1. D E S I G N T O P O G R A P H Y S H O W N O N O U T E R S L O P E S O F PH A S E S 1 - 6 I S R E P R E S E N T A T I V E O F P R O P O S E D IN T E R M E D I A T E C O V E R 2. E X I S T I N G T O P O G R A P H Y S H O W N O U T S I D E O F P H A S E S 1- 6 I S F R O M A P R I L 1 6 , 2 0 1 4 A E R I A L S U R V E Y B Y W S P . 3. A L L M A P P I N G I S N . C . S T A T E P L A N E C O O R D I N A T E S NA D 8 3 A N D N A V D 8 8 . 4. L I M I T O F P H A S E S 1 - 5 L I N E R L O C A T I O N O B T A I N E D FR O M D R A W I N G E N T I T L E D “ F A C I L I T Y P L A N P H A S E 1 - 5 ” PR E P A R E D B Y B L A C K R O C K E N G I N E E R S D A T E D AU G U S T 1 6 , 2 0 1 3 , C O N V E R T E D T O N A D 8 3 / N A V D 8 8 . 5. L I M I T O F P H A S E 6 L I N E R L O C A T I O N O B T A I N E D F R O M DR A W I N G E N T I T L E D “ R E C O R D S U R V E Y - T O P O F PR O T E C T I V E C O V E R - 0 - 7 0 2 1 ” P R E P A R E D B Y BL A C K R O C K E N G I N E E R S , D A T E D S E P T E M B E R 2 4 , 20 1 4 , C O N V E R T E D T O N A D 8 3 / N A V D 8 8 . LE G E N D NO T E S 1. I N T E R M E D I A T E C O V E R G R A D E S F O R P H A S E S 1 - 6 AR E R E P R E S E N T A T I V E O F A S U R F A C E T H A T I S 1 . 6 FE E T L O W E R T H A N F I N A L C O V E R G R A D E S . 2. C H I M N E Y D R A I N S W I L L B E A B A N D O N E D ( C U T O F F BE L O W I N T E R M E D I A T E C O V E R A N D C A P P E D ) P R I O R TO F I N A L C O V E R C O N S T R U C T I O N . 50 0 50 0 PR O P O S E D 1 0 ' C O N T O U R T H I S P H A S E (IN T E R M E D I A T E C O V E R ) EX I S T I N G 1 0 ' C O N T O U R EX I S T I N G 2 ' C O N T O U R PH A S E 6 - L I N E R L I M I T PH A S E S 1 - 5 - L I N E R L I M I T PR O P O S E D 2 ' C O N T O U R T H I S P H A S E (IN T E R M E D I A T E C O V E R ) EX I S T I N G D O W N P I P E PR O P O S E D D O W N P I P E UN S U R V E Y E D E X I S T I N G CH I M N E Y D R A I N (A P P R O X I M A T E L O C A T I O N ) PR O P O S E D R I P R A P EX I S T I N G R I P R A P PR O P O S E D C H I M N E Y D R A I N 50 0 10 ' D E S I G N C O N T O U R (IN T E R M E D I A T E C O V E R F O R P H A S E S 1 - 5 ) 2' D E S I G N C O N T O U R (IN T E R M E D I A T E C O V E R F O R P H A S E S 1 - 5 ) PHASE 6 E 1,983,000 E 1,982,500 E 1,982,000 E 1 , 9 8 1 , 5 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 0 , 5 0 0 N 9 9 4 , 0 0 0 N 9 9 3 , 5 0 0 N 9 9 3 , 0 0 0 N 9 9 2 , 5 0 0 N 9 9 2 , 0 0 0 N 9 9 1 , 5 0 0 CH A N N E L P C - 1 CH A N N E L P C - 2 LIM I T O F P H A S E S 1 - 5 LIN E R ( R E F E R E N C E 4 ) LIM I T O F P H A S E 6 LIN E R ( R E F E R E N C E 5 ) NORTH RAMP D P - 1 4 DP-13 DP-12DP-11DP-10DP-2A CD-6BCD-6CCD-6ACD-6D CD-6F CD-6ECD-6I CD-6HCD-6J CD-6LCD-6MCD-6K CD-6GPHASES 1 - 5 PHASE 6 SO U T H B E R M W I T H I N T E R I M C O V E R S Y S T E M EAST BERM WITH INTERIM COVER SYSTEM 3 D-1.12D-1.1 IN T E R I M C O V E R T A C K - O N B E N C H T I E - I N T O D O W N P I P E ( T Y P . ) 1 D- 1 . 2 INTERIM COVER TACK-ON BENCH (TYP.)3 D-1.2 IN T E R I M C O V E R D O W N P I P E ( T Y P . ) 5 D-1 . 2 CD 3 J CD 3 I CD 4 H CD 4 G CD 4 I CD 4 E CD 4 D CD4C CD 3 F CD3E CD 3 G CD 3 H CD 4 F CD 2 G CD 2 F CD 2 E CD2CCD1CCD1BCD1A CD2A CD2B CD 2 D CD3BCD3D CD3A CD3C CD4A CD4BINTERIM COVER ROAD 4 D-1.2 RIPRAP OUTLET PROTECTION (TYP.)2 D-4.1 EN E R G Y D I S S I P A T O R A N D HE A D W A L L A T T R I P L E C U L V E R T 3 D- 3 . 1 CO N C R E T E E N E R G Y DIS S I P A T O R PHASING PLAN - COMPLETION OF PHASES 1-5 C-3.3N IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 RE F E R E N C E S 1. D E S I G N T O P O G R A P H Y S H O W N O N O U T E R S L O P E S O F PH A S E S 1 - 6 I S R E P R E S E N T A T I V E O F P R O P O S E D IN T E R M E D I A T E C O V E R . 2. E X I S T I N G T O P O G R A P H Y S H O W N O U T S I D E O F P H A S E S 1-6 I S F R O M A P R I L 1 6 , 2 0 1 4 A E R I A L S U R V E Y B Y W S P . 3. A L L M A P P I N G I S N . C . S T A T E P L A N E C O O R D I N A T E S NA D 8 3 A N D N A V D 8 8 . 4. L I M I T O F P H A S E S 1 - 5 L I N E R L O C A T I O N O B T A I N E D FR O M D R A W I N G E N T I T L E D “ F A C I L I T Y P L A N P H A S E 1 - 5 ” PR E P A R E D B Y B L A C K R O C K E N G I N E E R S D A T E D AU G U S T 1 6 , 2 0 1 3 , C O N V E R T E D T O N A D 8 3 / N A V D 8 8 . 5. L I M I T O F P H A S E 6 L I N E R L O C A T I O N O B T A I N E D F R O M DR A W I N G E N T I T L E D “ R E C O R D S U R V E Y - T O P O F PR O T E C T I V E C O V E R - 0 - 7 0 2 1 ” P R E P A R E D B Y BL A C K R O C K E N G I N E E R S , D A T E D S E P T E M B E R 2 4 , 20 1 4 , C O N V E R T E D T O N A D 8 3 / N A V D 8 8 . NO T E S 1. I N T E R M E D I A T E C O V E R G R A D E S F O R P H A S E S 1 - 6 AR E R E P R E S E N T A T I V E O F A S U R F A C E T H A T I S 1 . 6 FE E T L O W E R T H A N F I N A L C O V E R G R A D E S . 2. C H I M N E Y D R A I N S W I L L B E A B A N D O N E D ( C U T O F F BE L O W I N T E R M E D I A T E C O V E R A N D C A P P E D ) P R I O R TO F I N A L C O V E R C O N S T R U C T I O N . EX I S T I N G C H I M N E Y D R A I N PH A S E 6 - L I N E R L I M I T PH A S E S 1 - 5 - L I N E R L I M I T EX I S T I N G D O W N P I P E PR O P O S E D D O W N P I P E UN S U R V E Y E D E X I S T I N G CH I M N E Y D R A I N (A P P R O X I M A T E L O C A T I O N ) PR O P O S E D R I P R A P EX I S T I N G R I P R A P PR O P O S E D C H I M N E Y D R A I N LE G E N D 50 0 50 0 PR O P O S E D 1 0 ' C O N T O U R T H I S P H A S E (I N T E R M E D I A T E C O V E R ) EX I S T I N G 1 0 ' C O N T O U R EX I S T I N G 2 ' C O N T O U R PR O P O S E D 2 ' C O N T O U R T H I S P H A S E (I N T E R M E D I A T E C O V E R ) 50 0 10 ' D E S I G N C O N T O U R (I N T E R M E D I A T E C O V E R F O R P H A S E S 1 - 6 ) 2' D E S I G N C O N T O U R (I N T E R M E D I A T E C O V E R F O R P H A S E S 1 - 6 ) LIM I T O F P H A S E S 1 - 5 L I N E R (R E F E R E N C E 4 ) E 1,984,000 E 1,983,500 E 1,983,000 E 1,982,500 E 1 , 9 8 2 , 0 0 0 E 1 , 9 8 1 , 5 0 0 E 1 , 9 8 1 , 0 0 0 E 1 , 9 8 0 , 5 0 0 LI M I T O F P H A S E 6 L I N E R (R E F E R E N C E 5 ) CO N C R E T E E N E R G Y D I S S I P A T O R (B A S E D O N D E T A I L 3 / D - 3 . 1 ) RIP R A P RIP R A P D P - 6 DP - 7 D P - 5 A DP-9 DP-1 DP-2 DP-3 D P - 1 3 DP-12DP-11DP-10DP-2A CD 3 J CD 3 I CD 4 H CD 4 G CD 4 I CD 4 E CD 4 D CD 4 C CD 3 F CD 3 E CD 3 G CD 3 H CD 4 F CD 2 G CD 2 F CD 2 E CD 2 C CD 1 C CD 1 B CD1A CD2A CD2B CD 2 D CD3B CD 3 D CD3A CD 3 C CD4A CD 4 B FINAL COVER ROAD FI N A L C O V E R T A C K - O N B E N C H ( T Y P . ) 4 D- 2 . 2 CR E S T D I V E R S I O N B E R M 1 D- 2 . 4 CR E S T D I V E R S I O N B E R M A T D O W N P I P E 2 D- 2 . 4 FIN A L C O V E R S Y S T E M 1 D- 2 . 1 EAST BERM DOWNPIPE OUTLET WITH FINAL COVER SYSTEM FINAL COVER TACK-ON BENCH TIE-IN TO DOWNPIPE (TYP.)FINAL COVER DRIVEABLE DOWNPIPE MOUNDTOP DECK DIVERSION BERM AND UNDERDRAIN (TYP.)FINAL COVER DRIVEABLE DOUBLE DOWNPIPE MOUND FI N A L C O V E R D R I V E A B L E DO U B L E D O W N P I P E M O U N D 2 D- 2 . 3 CD - 6 B CD - 6 C CD - 6 D CD - 6 F CD - 6 E CD-6I CD-6HCD-6J CD-6LCD-6MCD-6K CD-6G CD - 6 A FIN A L C O V E R D R I V E A B L E D O W N P I P E M O U N D 3 D- 2 . 2 RIPRAP OUTLET PROTECTION (TYP.) SO U T H B E R M FINAL COVER DOWNPIPE MOUNDINLET TO BE REMOVED INLET TO BE REMOVED NEW DROP INLET (BASED ON DETAIL 2/D-2.4) IN L E T T O B E RE M O V E D EN E R G Y D I S S I P A T O R A N D H E A D W A L L AT T R I P L E C U L V E R T 3 D- 3 . 1 2 D-4.1 FI N A L C O V E R D O W N P I P E M O U N D 3 D- 2 . 2 3 D-2.4 3 D-2.2 1 D-2.3 2 D-2.3 2 D-2.1 1 D-2.2 3 D-2.2NORTH RAMP 1 D-2.3 DP-1 D P - 1 4 D P - 5 B TO P D E C K C H A N N E L W E S T 3 D- 4 . 1 TOP DECK CHANNEL EAST 3 D-4.1 VERTICAL EXPANSION FINAL GRADING AND DRAINAGE PLAN C-4.1 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015N RE F E R E N C E S 1. T O P O G R A P H Y F R O M A P R I L 1 , 2 0 1 5 A E R I A L S U R V E Y B Y W S P . 2. P R O P O S E D P H A S E 1 - 5 F I N A L C O V E R C O N T O U R S A R E B A S E D ON D R A W I N G E N T I T L E D " F A C I L I T Y P L A N P H A S E 1 - 5 " B Y BL A C K R O C K E N G I N E E R S , 8 / 1 6 / 2 0 1 3 , C O N V E R T E D T O NA D 8 3 / N A V D 8 8 , M O D I F I E D A B O V E E L E V A T I O N 5 8 0 A N D I N TH E V I C I N I T Y O F D P - 9 . 3. A L L M A P P I N G I S N . C . S T A T E P L A N E C O O R D I N A T E S NA D 8 3 ( 2 0 1 1 ) A N D N A V D 8 8 . 4. L I M I T O F P H A S E S 1 - 5 L I N E R L O C A T I O N O B T A I N E D F R O M DR A W I N G E N T I T L E D “ F A C I L I T Y P L A N P H A S E 1 - 5 ” P R E P A R E D BY B L A C K R O C K E N G I N E E R S D A T E D A U G U S T 1 6 , 2 0 1 3 , CO N V E R T E D T O N A D 8 3 / N A V D 8 8 . 5. L I M I T O F P H A S E 6 L I N E R L O C A T I O N O B T A I N E D F R O M DR A W I N G E N T I T L E D “ R E C O R D S U R V E Y - T O P O F PR O T E C T I V E C O V E R - 0 - 7 0 2 1 ” P R E P A R E D B Y B L A C K R O C K EN G I N E E R S , D A T E D S E P T E M B E R 2 4 , 2 0 1 4 , C O N V E R T E D T O NA D 8 3 / N A V D 8 8 . LE G E N D EX I S T I N G M A J O R C O N T O U R PR O P O S E D F I N A L C O V E R MA J O R C O N T O U R PR O P O S E D F I N A L C O V E R MIN O R C O N T O U R EX I S T I N G D O W N P I P E I N L E T 10 0 EX I S T I N G M I N O R C O N T O U R EX I S T I N G C H I M N E Y D R A I N (S E E N O T E 2 ) 10 0 EX I S T I N G D O W N P I P E OR C U L V E R T EX I S T I N G D R A I N A G E D I T C H PR O P O S E D D O W N P I P E I N L E T PR O P O S E D C H I M N E Y D R A I N (S E E N O T E 2 ) PR O P O S E D D O W N P I P E EX I S T I N G R I P R A P PR O P O S E D R I P R A P PR O P O S E D C A P DI V E R S I O N B E R M PR O P O S E D C R E S T D I V E R S I O N B E R M (F L O W D I R E C T I O N I N D I C A T E D ) PR O P O S E D F L O W L I N E OF T A C K O N B E N C H NO T E S : 1. A L L D O W N P I P E S A R E 1 8 - I N C H D I A . C P P . 2. D O W N P I P E S D P - 1 0 A N D D P - 1 4 W I L L E A C H C O N S I S T O F TW O 1 8 - I N C H D I A . C P P D O W N P I P E S . 3. C H I M N E Y D R A I N S W I L L B E A B A N D O N E D ( C U T O F F B E L O W IN T E R M E D I A T E C O V E R A N D C A P P E D ) P R I O R T O F I N A L CO V E R C O N S T R U C T I O N . ST O N E P A V E D A C C E S S R O A D DETAIL CALLOUT X X-XXDETAIL LEGEND EXISTING COMPACTED SOIL LINER EXISTING PROTECTIVE COVER WASTE INTERMEDIATE COVER FINAL COVER VEGETATIVE SOIL COVER RIPRAP COMPACTED ABC STONE 40-MIL DOUBLE-SIDED TEXTURED LLDPE GEOMEMBRANE GEOCOMPOSITE DRAINAGE LAYER GEOTEXTILE EXISTING LINER GEOSYNTHETICS PIPE (HIDDEN)PIPE (EXPOSED)SLOPE CALLOUT 2% CH I M N E Y D R A I N ( W H E R E P R E S E N T ) (S E E N O T E S 1 A N D 2 ) 20 ' R O A D VA R I E S 6' VA R I E S ( 1 0 ' T O 1 8 ' ) FIN A L C O V E R G R A D E S 2 D- 3 . 1 2% 2% TO P O F W A S T E GR A D E S S H O W N O N CH I M N E Y D R A I N P L A N 12-INCH THICKNESS OF ABC UNDERLAIN BY GEOTEXTILE SEPARATOR LIMIT OF LINER MARKER NO T E S : 1. C H I M N E Y D R A I N S C D - 6 L A N D C D - 6 M S H A L L C O N S I S T O F T W O 1 0 - F T R I S E R S A N D O N E 1 0 - F T H O R I Z O N T A L SE C T I O N , A L L P E R F O R A T E D A N D W R A P P E D P E R D E T A I L 2 / D - 3 . 1 , M O D I F I E D A S S H O W N H E R E . 2. C H I M N E Y D R A I N S C D - 6 L A N D C D - 6 M A R E L O C A T E D C L O S E T O L E A C H A T E C O L L E C T I O N P I P E S T O I N C R E A S E TH E I N F I L T R A T I O N C A P A C I T Y O F T H E S E S T R U C T U R E S . E X E R C I S E E X T R E M E C A U T I O N N O T T O D A M A G E TH E G E O T E X T I L E W R A P A R O U N D T H E L E A C H A T E C O L L E C T I O N P I P E / A G G R E G A T E M O U N D . 3. T H E E X I S T I N G L I N E R S Y S T E M C O N S I S T S O F , F R O M T O P T O B O T T O M : 1 8 - I N C H T H I C K P R O T E C T I V E C O V E R , LE A C H A T E C O L L E C T I O N G E O C O M P O S I T E , P R I M A R Y 6 0 - M I L T E X T U R E D H D P E G E O M E M B R A N E , L E A K DE T E C T I O N G E O C O M P O S I T E , S E C O N D A R Y 6 0 - M I L T E X T U R E D H D P E G E O M E M B R A N E , A N D 1 2 - I N C H T H I C K CO M P A C T E D C L A Y L I N E R . A L L P R O T E C T I V E C O V E R M A T E R I A L O N P H A S E 6 P E R I M E T E R B E R M S C O N S I S T S OF W A S H E D Q U A R R Y S C R E E N I N G S . 1 3 3 1 EX I S T I N G L I N E R S Y S T E M 3 ' 7 ' 3 1 (S E E N O T E 3 ) AR E A T O B E F I L L E D WIT H B O T T O M A S H 1 3 IN T E R I M PE R I M E T E R CH A N N E L 20' ROAD 60 ' VA R I E S 6' 10 ' 6' 12-INCH THICKNESS OF ABC UNDERLAIN BY GEOTEXTILE SEPARATOR 2% 2% LIMIT OF LINER MARKER 12 " I N T E R M E D I A T E C O V E R 3 1 VARIES EX I S T I N G L I N E R S Y S T E M (S E E N O T E 3 ) 5% 20 ' R O A D 13 1 3 1 3 FO R M E R L O C A T I O N O F IN T E R I M C H A N N E L 4'L x 4 ' W x 3 . 5 ' H PR E C A S T C O N C R E T E DR O P I N L E T MEET EXISTING GROUND SURFACE NO T E S : 1. T O E D R A I N W I L L B E 6 " C P P P E R F O R A T E D P I P E E M B E D D E D I N N o . 7 8 S T O N E . L O W P O I N T S O F T O E D R A I N W I L L O U T L E T T O T H E E A S T . EX I S T I N G L I N E R S Y S T E M G E O S Y N T H E T I C S EX I S T I N G P R O T E C T I V E C O V E R (W A S H E D Q U A R R Y S C R E E N I N G S ) WA S T E 12 - I N . T H I C K N E S S O F A B C UN D E R L A I N B Y G E O T E X T I L E DOWNPIPE CONTINUES TO OUTLET1.5 FT. COVER OVER PIPE LIM I T O F W A S T E MA R K E R 6' 10 ' 18 " D I A . D R - 1 7 HD P E D O W N P I P E GEOMEMBRANE UNDER DOWNPIPE MAY BE LOWERED AS NEEDED LL D P E GE O M E M B R A N E 6' 7.5 ' INTERIM COVER DETAILS D-1.1 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 EA S T B E R M W I T H I N I T I A L G R A D E S NO T T O S C A L E 1 D- 1 . 1 SO U T H B E R M W I T H I N T E R I M C O V E R S Y S T E M NO T T O S C A L E 3 D- 1 . 1 --- EA S T B E R M W I T H I N T E R I M C O V E R S Y S T E M NO T T O S C A L E 2 D- 1 . 1 12 - I N . I N T E R M E D I A T E C O V E R WA S T E TA C K - O N B E N C H FL O W L I N E (2 P E R C E N T S L O P E ) 18 - I N . D I A . H D P E PI P E C R O S S 18 - I N . D I A . C P P P I P E (S E E N O T E S 2 A N D 3 ) W (S E E N O T E 1 ) 10 ' 10 ' 1 3 1 3 1.5 ' NO T E S : 1. F O R D R I V E A B L E D O W N P I P E M O U N D S , W = 1 0 F E E T . FO R A L T E R N A T E D O W N P I P E M O U N D S , W = 3 F E E T . 2. A T T H E T I M E O F F I N A L C L O S U R E , R E M O V E E X I S T I N G I N T E R I M C O V E R D O W N P I P E S . 3. D O W N P I P E S S H A L L B E C P P , S M O O T H I N T E R I O R , W I T H W A T E R T I G H T J O I N T S , B E L L AN D S P I G O T E N D S S H A L L N O T B E C U T O F F . PR O J E C T I O N O F SO I L M O U N D DETAIL CALLOUT X X-XXDETAIL LEGEND WASTE INTERMEDIATE COVER FINAL COVER VEGETATIVE SOIL COVER RIPRAP AGGREGATE BASE COURSE (ABC)40-MIL DOUBLE-SIDED TEXTURED LLDPE GEOMEMBRANE GEOCOMPOSITE DRAINAGE LAYER GEOTEXTILE FINAL COVER GEOSYNTHETICS EROSION CONTROL BLANKET PIPE (HIDDEN)PIPE (EXPOSED)SLOPE CALLOUT2%W (SEE NOTE 1) 10 . 0 ' 1.5'10.0'13 13 12-IN. INTERMEDIATE COVER NOTES:1. F O R D R I V E A B L E D O W N P I P E M O U N D S , W = 1 0 F E E T . FOR ALTERNATE DOWNPIPE MOUNDS, W = 3 FEET.2. A T T H E T I M E O F F I N A L C L O S U R E , R E M O V E E X I S T I N G I N T E R I M C O V E R D O W N P I P E S . 3. D O W N P I P E S S H A L L B E C P P , S M O O T H I N T E R I O R , W I T H W A T E R T I G H T J O I N T S , B E L L AND SPIGOT ENDS SHALL NOT BE CUT OFF.4. I N S T A L L O N E R O L L W I D T H O F E R O S I O N C O N T R O L B L A N K E T C E N T E R E D O N T O E OF MOUND, EACH SIDE.WASTE18-IN. DIA. CPP DOWNPIPE (SEE NOTES 2 AND 3) ER O S I O N C O N T R O L B L A N K E T ( T Y P . ) (S E E N O T E 4 ) 3 H : 1 V ( L A N D F I L L S L O P E ) TA C K - O N B E N C H F L O W L I N E (2 P E R C E N T S L O P E ) 2 H : 1 V ( T A C K - O N B E N C H ) 3 H : 1 V ( T A C K - O N B E N C H ) 3 H : 1 V ( L A N D F I L L S L O P E ) 3H : 1 V (D O W N D R A I N M O U N D ) 3 H : 1 V ( L A N D F I L L S L O P E ) TA C K - O N B E N C H F L O W L I N E (2 P E R C E N T S L O P E ) 2 H : 1 V ( T A C K - O N B E N C H ) 3 H : 1 V ( T A C K - O N B E N C H ) 3 H : 1 V ( L A N D F I L L S L O P E ) 3H : 1 V (D O W N D R A I N M O U N D ) 3H : 1 V (D O W N D R A I N M O U N D ) 3H : 1 V (D O W N D R A I N M O U N D ) 18 - I N . D I A . C P P D O W N P I P E 18 - I N . D I A . C P P C R O S S 18 - I N . D I A . C P P P I P E (S E E N O T E S 2 A N D 3 ) 2 D-1 . 2 2 D- 1 . 2 4 D - 1 . 2 4 D - 1 . 2 3 D- 1 . 2 3 D- 1 . 2 NO T E S : 1. F O R D R I V E A B L E D O W N P I P E M O U N D S , W = 1 0 F E E T . FO R A L T E R N A T E D O W N P I P E M O U N D S , W = 3 F E E T . 2. A T T H E T I M E O F F I N A L C L O S U R E , R E M O V E E X I S T I N G I N T E R I M C O V E R D O W N P I P E S . 3. D O W N P I P E S S H A L L B E C P P , S M O O T H I N T E R I O R , W I T H W A T E R T I G H T J O I N T S , B E L L A N D SP I G O T E N D S S H A L L N O T B E C U T O F F . W (S E E N O T E 1 ) 9.0' 18 . 0 ' 4.5'4.5'13 13 1 3 1 2 WASTE 1 2 - I N . I N T E R M E D I A T E C O V E R ER O S I O N C O N T R O L B L A N K E T NO T E S : 1. A T T H E T I M E O F F I N A L C L O S U R E , R E M O V E E X I S T I N G I N T E R I M T A C K O N B E N C H E S . 1 3 1 3 12-IN. COMPACTED ABC STONE GE O T E X T I L E S E P A R A T O R 2%2% 2%18 - I N . C L A S S 1 R I P - R A P GE O T E X T I L E S E P A R A T O R 12 - I N . I N T E R I M C O V E R 12 ' 5' 30'10'13 CH A N N E L SH O U L D E R ROAD S H O U L D E R 24-IN. INTERIM COVER SL O P E VA R I E S WASTE 1.5 ' 3' 1.5 ' INTERIM COVER DETAILS D-1.2 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 IN T E R I M C O V E R T A C K - O N B E N C H T I E - I N T O D O W N P I P E S E C T I O N NO T T O S C A L E 2 D- 1 . 2 INTERIM COVER DOWNPIPE SECTION NOT TO SCALE5 D-1.2 IN T E R I M C O V E R T A C K - O N B E N C H T I E - I N T O D O W N P I P E NO T T O S C A L E 1 D- 1 . 2 IN T E R I M C O V E R T A C K - O N B E N C H S E C T I O N NO T T O S C A L E 3 D- 1 . 2 ---INTERIM COVER ROAD NOT TO SCALE4 D-1.2 DETAIL CALLOUT X X-XXDETAIL LEGEND EXISTING COMPACTED SOIL LINER EXISTING PROTECTIVE COVER WASTE INTERMEDIATE COVER FINAL COVER VEGETATIVE SOIL COVER NCDOT 78M DRAINAGE AGGREGATE RIPRAP COMPACTED ABC STONE 40-MIL DOUBLE-SIDED TEXTURED LLDPE GEOMEMBRANE GEOCOMPOSITE DRAINAGE LAYER GEOTEXTILE FINAL COVER GEOSYNTHETICS EXISTING CONTROL BLANKET EXISTING LINER GEOSYNTHETICS PIPE (HIDDEN)PIPE (EXPOSED)SLOPE CALLOUT 2% NO T E S : 1. G E O S Y N T H E T I C C O M P O N E N T S S H O W N A T E X A G G E R A T E D S C A L E . 2. A T T H E T I M E O F I N I T I A L P L A C E M E N T , I N T E R M E D I A T E C O V E R S H A L L B E A B O U T 1 2 - I N C H E S TH I C K . A T T H E T I M E O F F I N A L C O V E R C O N S T R U C T I O N , T H E R E S H A L L B E N O M I N I M U M TH I C K N E S S R E Q U I R E M E N T F O R I N T E R M E D I A T E C O V E R . 3. T H E T H I C K N E S S O F F I N A L C O V E R S H A L L B E M E A S U R E D F R O M T H E B O T T O M O F T H E GE O M E M B R A N E ( L I N E R S Y S T E M S U B G R A D E ) T O T H E T O P O F T H E F I N A L C O V E R . 4. T H E T H I C K N E S S O F V E G E T A T I V E S O I L C O V E R S H A L L B E M E A S U R E D F R O M T H E T O P O F TH E F I N A L C O V E R T O T H E T O P O F T H E V E G E T A T I V E S O I L C O V E R . 5. V E G E T A T I V E S O I L C O V E R A N D F I N A L C O V E R M A Y B E T H E S A M E M A T E R I A L A N D M A Y B E PL A C E D I N A S I N G L E L I F T . 40 - M I L D O U B L E - S I D E D TE X T U R E D L L D P E GE O M E M B R A N E GE O C O M P O S I T E DR A I N A G E L A Y E R 6-I N . V E G E T A T I V E S O I L C O V E R (S E E N O T E 4 ) 18 - I N . F I N A L C O V E R (S E E N O T E 3 ) IN T E R M E D I A T E C O V E R (S E E N O T E 2 ) WA S T E 5%20' ROAD 13 1 3 1 3 FO R M E R L O C A T I O N O F IN T E R I M C H A N N E L 4'L x 4 ' W x 3 . 5 ' H PR E C A S T C O N C R E T E DR O P I N L E T MEET EXISTING GROUND SURFACE FIN A L C O V E R S Y S T E M 1 D-1 . 1 FIN A L C O V E R S Y S T E M G E O C O M P O S I T E O U T L E T NO T E S : 1. T O E D R A I N W I L L B E 6 " C P P P E R F O R A T E D P I P E E M B E D D E D I N N o . 7 8 S T O N E . L O W P O I N T S O F T O E D R A I N W I L L O U T L E T T O T H E E A S T . 3 D-2 . 3 EX I S T I N G C O M P A C T E D S O I L L I N E R EX I S T I N G L I N E R S Y S T E M G E O S Y N T H E T I C S EX I S T I N G P R O T E C T I V E C O V E R (W A S H E D Q U A R R Y S C R E E N I N G S ) WA S T E 12-IN. THICKNESS OF ABC UNDERLAIN BY GEOTEXTILE LIMIT OF STRUCTURAL FILL CAP MARKER DOWNPIPE CONTINUES TO OUTLET1.5 FT. COVER OVER PIPE LI M I T O F W A S T E MA R K E R LIM I T O F L I N E R MA R K E R 6' 10 ' 1 1 18 " D I A . D R - 1 7 HD P E D O W N P I P E TO E D R A I N (S E E N O T E 1 ) EX T R U S I O N WE L D GEOMEMBRANE UNDER DOWNPIPE MAY BE LOWERED AS NEEDED LL D P E GE O M E M B R A N E 6' FINAL COVER DETAILS D-2.1 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 EA S T B E R M D O W N P I P E O U T L E T W I T H F I N A L C O V E R S Y S T E M NO T T O S C A L E 2 D- 2 . 1 FI N A L C O V E R S Y S T E M NO T T O S C A L E 1 D- 2 . 1 --- DETAIL CALLOUT X X-XXDETAIL LEGEND WASTE INTERMEDIATE COVER FINAL COVER VEGETATIVE SOIL COVER NCDOT 78M DRAINAGE AGGREGATE RIPRAP AGGREGATE BASE COURSE (ABC)40-MIL DOUBLE-SIDED TEXTURED LLDPE GEOMEMBRANE GEOCOMPOSITE DRAINAGE LAYER GEOTEXTILE FINAL COVER GEOSYNTHETICS EROSION CONTROL BLANKET PIPE (HIDDEN)PIPE (EXPOSED)SLOPE CALLOUT 2% 3 H : 1 V ( L A N D F I L L S L O P E ) TA C K - O N B E N C H F L O W L I N E (2 P E R C E N T S L O P E ) 2 H : 1 V ( T A C K - O N B E N C H ) 3 H : 1 V ( T A C K - O N B E N C H ) 3 H : 1 V ( L A N D F I L L S L O P E ) 3H : 1 V (D O W N P I P E MO U N D ) 3H : 1 V (D O W N P I P E MO U N D ) 3 H : 1 V ( L A N D F I L L S L O P E ) TA C K - O N B E N C H F L O W L I N E (2 P E R C E N T S L O P E ) 2 H : 1 V ( T A C K - O N B E N C H ) 3 H : 1 V ( T A C K - O N B E N C H ) 3 H : 1 V ( L A N D F I L L S L O P E ) 3H : 1 V (D O W N P I P E MO U N D ) 3H : 1 V (D O W N P I P E MO U N D ) NO T E S : 1. F O R D R I V E A B L E D O W N P I P E M O U N D S , W = 1 0 F E E T . FO R A L T E R N A T E D O W N P I P E M O U N D S , W = 3 F E E T . 2. F I E L D - F I T G R A D E S T O D R A I N T O G R A T E O R T R A S H R A C K . 3. D O W N P I P E S S H A L L B E C P P , S M O O T H I N T E R I O R , W I T H W A T E R T I G H T J O I N T S . B E L L A N D S P I G O T E N D S S H A L L N O T B E C U T O F F . 18 - I N . D I A . C P P D O W N P I P E (S E E N O T E 3 ) 18 - I N . D I A . C P P CR O S S 18 - I N . D I A . C P P DR O P I N L E T W I T H G R A T E (S E E N O T E 2 ) 2 D- 2 . 2 2 D- 2 . 2 4 D - 2 . 2 4 D - 2 . 2 3 D- 2 . 2 3 D- 2 . 2 RE M O V E D R A I N A G E G E O C O M P O S I T E FO L D D R A I N A G E G E O C O M P O S I T E O V E R 1 - I N . D R A I N P I P E IN S T A L L 1 - I N . P E R F O R A T E D D R A I N P I P E DA Y L I G H T DR A I N P I P E GE O C O M P O S I T E O U T L E T 3 D- 2 . 3 PO S I T I O N C R O S S DO W N S L O P E O F F L O W L I N E AS N E E D E D T O L O W E R EL E V A T I O N O F G R A T E W (S E E N O T E 1 ) W (S E E N O T E 1 ) 4.0 ' 1. 0 ' 4.0 ' FIN A L C O V E R S Y S T E M NO T E S : 1. F O R D R I V E A B L E D O W N P I P E M O U N D S , W = 1 0 F E E T . FO R A L T E R N A T E D O W N P I P E M O U N D S , W = 3 F E E T . 2. F I E L D - F I T G R A D E S T O D R A I N T O G R A T E O R T R A S H R A C K . 18 - I N . D I A . C P P CR O S S 18 - I N . D I A . C P P DR O P I N L E T W I T H G R A T E (S E E N O T E 2 ) FIE L D - F I T G R A D E S T O DR A I N T O G R A T E PR O J E C T E D T Y P I C A L DO W N P I P E C O V E R G R A D E S 1 D- 2 . 1 TA C K - O N B E N C H F L O W L I N E (2 P E R C E N T S L O P E ) WA S T E IN T E R M E D I A T E C O V E R ( N O M I N I M U M T H I C K N E S S ) W (S E E N O T E 1 ) 4.0 ' 1.0 ' FINAL COVER SYSTEM 1 3 13 NO T E S : 1. F O R D R I V E A B L E D O W N P I P E M O U N D S , W = 1 0 F E E T . FO R A L T E R N A T E D O W N P I P E M O U N D S , W = 3 F E E T . 2. A T T H E T I M E O F F I N A L C L O S U R E , R E M O V E E X I S T I N G I N T E R I M C O V E R D O W N P I P E S . 3. D O W N P I P E S S H A L L B E C P P , S M O O T H I N T E R I O R , W I T H W A T E R T I G H T J O I N T S . B E L L A N D S P I G O T E N D S S H A L L N O T B E C U T O F F . 4. I N S T A L L O N E R O L L W I D T H O F E R O S I O N C O N T R O L B L A N K E T C E N T E R E D O N T O E O F M O U N D , E A C H S I D E . WA S T E IN T E R M E D I A T E C O V E R ( N O M I N I M U M T H I C K N E S S ) 18-IN. DIA. CPP DOWNPIPE (SEE NOTES 2 AND 3)1 D-2.1EROSION CONTROL BLANKET (TYP.)(SEE NOTE 4)9.0' 18 . 0 ' 4.5'4.5'FINAL COVER SYSTEM GEOCOMPOSITE OUTLET 13 13 1 3 1 2 WA S T E RE M O V E I N T E R I M C O V E R T A C K - O N B E N C H P R I O R TO I N S T A L L I N G G E O S Y N T H E T I C C O V E R S Y S T E M 3 D-2.3 FI N A L C O V E R S Y S T E M 1 D- 2 . 1 ER O S I O N C O N T R O L B L A N K E T FINAL COVER DETAILS D-2.2 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 FI N A L C O V E R T A C K - O N B E N C H T I E - I N T O D O W N P I P E NO T T O S C A L E 1 D- 2 . 2 FI N A L C O V E R T A C K - O N B E N C H T I E - I N T O D O W N P I P E S E C T I O N NO T T O S C A L E 2 D- 2 . 2 FI N A L C O V E R D O W N P I P E S E C T I O N NO T T O S C A L E 3 D- 2 . 2 FI N A L C O V E R T A C K - O N B E N C H S E C T I O N NO T T O S C A L E 4 D- 2 . 2 --- DETAIL CALLOUT X X-XXDETAIL LEGEND WASTE INTERMEDIATE COVER FINAL COVER VEGETATIVE SOIL COVER RIPRAP AGGREGATE BASE COURSE (ABC)40-MIL DOUBLE-SIDED TEXTURED LLDPE GEOMEMBRANE GEOCOMPOSITE DRAINAGE LAYER GEOTEXTILE FINAL COVER GEOSYNTHETICS EROSION CONTROL BLANKET PIPE (HIDDEN)PIPE (EXPOSED)SLOPE CALLOUT2% 10 . 0 ' 4.0 ' 1.0 ' FINAL COVER SYSTEM 1 3 1 3 WA S T E IN T E R M E D I A T E C O V E R ( N O M I N I M U M T H I C K N E S S ) 18 - I N . D I A . C P P D O W N D R A I N ( T Y P . ) (S E E N O T E S 1 , 2 , A N D 3 ) 1 D-2.1 NO T E S : 1. A T T H E T I M E O F F I N A L C L O S U R E , R E M O V E E X I S T I N G I N T E R I M C O V E R D O W N P I P E S . 2. D O W N P I P E S S H A L L B E C P P , S M O O T H I N T E R I O R , W I T H W A T E R T I G H T J O I N T S . 3. B E L L A N D S P I G O T E N D S S H A L L N O T B E C U T O F F . 4. T H I S D E T A I L A P P L I E S T O D P - 1 0 A N D D P - 1 4 . 5. I N S T A L L O N E R O L L W I D T H O F E R O S I O N C O N T R O L B L A N K E T C E N T E R E D O N T O E O F M O U N D , E A C H S I D E . 1.0 ' 8.0 ' ER O S I O N C O N T R O L B L A N K E T ( T Y P . ) (S E E N O T E 5 ) 6.0 ' 1 3 1 3 2% NO T E S : 1. G E O S Y N T H E T I C C O M P O N E N T S S H O W N A T E X A G G E R A T E D S C A L E . CE N T E R L I N E O F TA C K - O N B E N C H FIN A L C O V E R S Y S T E M 1 D- 2 . 1 1.5 ' WA S T E ER O S I O N C O N T R O L BL A N K E T 6.0' 1 3 1 3 2% NO T E S : 1. G E O S Y N T H E T I C C O M P O N E N T S S H O W N A T E X A G G E R A T E D S C A L E . CE N T E R L I N E O F TA C K - O N B E N C H FINAL COVER SYSTEM 1 D-2.1 1.5 ' WASTE ER O S I O N C O N T R O L BL A N K E T TY P I C A L ALTERNATE 20 - M I L P E F L A P (O V E R L A P 1 F O O T W I T H G E O C O M P O S I T E AN D W R A P T O T O P O F P I P E ) EX T R U S I O N W E L D 3" D I A . C P P NO N - P E R F O R A T E D O U T L E T PIP E ( E V E R Y 2 0 0 F E E T ) 3" D I A . C P P S L O T T E D P I P E EXTRUSION WELD 40-MIL LLDPE FLAP 1' 1 3 1 18 - I N . C L A S S B R I P - R A P 3 GE O T E X T I L E S E P A R A T O R 8- I N . C O M P A C T E D A B C S T O N E GE O T E X T I L E S E P A R A T O R 2% 2% IN T E R M E D I A T E C O V E R (N O M I N I M U M T H I C K N E S S ) 12 . 0 ' CH A N N E L 5.0 ' SH O U L D E R 30 . 0 ' R O A D 10.0' SH O U L D E R 13 1' FI N A L C O V E R S Y S T E M GE O C O M P O S I T E O U T L E T FIN A L C O V E R G R A D E S NO T E S : 1. E A C H U N D E R D R A I N S E C T I O N W I L L D I S C H A R G E T O A D O W N P I P E . FIN A L C O V E R WA S T E 2% 2% 3 D- 2 . 3 3' 1.5 ' 6" C P P P E R F O R A T E D U N D E R D R A I N E M B E D D E D I N N O . 7 8 S T O N E GE O T E X T I L E S E P A R A T O R ( W R A P A R O U N D S T O N E ) FINAL COVER DETAILS D-2.3 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 FI N A L C O V E R D R I V E A B L E D O U B L E D O W N P I P E M O U N D NO T T O S C A L E 2 D- 2 . 3 FI N A L C O V E R S Y S T E M G E O C O M P O S I T E O U T L E T NO T T O S C A L E 3 D- 2 . 3 FI N A L C O V E R R O A D NO T T O S C A L E 1 D- 2 . 3 --- CR E S T O F F I N A L C O V E R GE O T E X T I L E S E P A R A T O R (W R A P A R O U N D S T O N E ) GE O C O M P O S I T E D R A I N A G E L A Y E R 40 - M I L T E X T U R E D L L D P E G E O M E M B R A N E GE O C O M P O S I T E GE O T E X T I L E CU S H I O N 1 3 WA S T E 1 2 2% CR E S T D I V E R S I O N B E R M 2 1 20 ' 14 ' 1.5 ' M I N . (S E E N O T E 1 ) 6" C P P P E R F O R A T E D U N D E R D R A I N EM B E D D E D I N N O . 7 8 S T O N E (D R A I N T O D O W N P I P E O R DR A I N A G E C H A N N E L ) 3' NO T E S : 1. F I N A L D E S I G N W I L L P R O V I D E D E P T H S U F F I C I E N T FO R R U N O F F F R O M 2 5 - Y E A R S T O R M . 20 - M I L P E F L A P ( O V E R L A P 1 F O O T W I T H GE O C O M P O S I T E A N D W R A P T O T O P O F P I P E ) EX T R U S I O N W E L D 1' CR E S T O F F I N A L C O V E R FIN A L C O V E R G R A D E PR O J E C T I O N O F G E O M E M B R A N E OU T S I D E O F D O W N P I P E T R E N C H 11 . 2 5 ° BE N D 18 " C P P D O W N P I P E ( O N E 1 3 F T . L E N G T H AN D O N E N O M I N A L 2 0 F T . L E N G T H ) PR O J E C T I O N O F F I N A L CO V E R G R A D E S DO W N P I P E C O V E R M O U N D 40 - M I L L L D P E T E X T U R E D GE O M E M B R A N E TO P D E C K U N D E R D R A I N CO N N E C T I O N T O D R O P I N L E T DROP INLET (36" DIA.DR-32.5 HDPE PIPE WITH ANTI-VORTEX PLATE AND TRASH RACK)GEOCOMPOSITE DRAINAGE LAYER 40-MIL TEXTURED LLDPE GEOMEMBRANE 1 WA S T E 3 2% 5% NO T E S : 1. D O N O T C U T 1 8 " C P P P I P E O R F I T T I N G S . 2. W H E R E Q 5 0 E X C E E D S 1 5 C F S , P R O V I D E T W O DR O P I N L E T S I N P A R A L L E L . 4 1 2 2 1 1 20 ' 14 ' 2' 6' DETAIL CALLOUT X X-XXDETAIL LEGEND WASTE INTERMEDIATE COVER FINAL COVER VEGETATIVE SOIL COVER NCDOT 78M DRAINAGE AGGREGATE RIPRAP COMPACTED ABC STONE 40-MIL DOUBLE-SIDED TEXTURED LLDPE GEOMEMBRANE GEOCOMPOSITE DRAINAGE LAYER GEOTEXTILE FINAL COVER GEOSYNTHETICS EROSION CONTROL BLANKET PIPE (HIDDEN)PIPE (EXPOSED)SLOPE CALLOUT 2%6" CPP PERFORATED UNDERDRAIN EMBEDDED IN NO. 78 STONE (DRAIN TO DOWNPIPE OR DRAINAGE CHANNEL)GEOTEXTILE SEPARATOR (WRAP AROUND STONE)GEOCOMPOSITE DRAINAGE LAYER 40-MIL TEXTURED LLDPE GEOMEMBRANE GEOTEXTILE CUSHIONWASTE 3 1 4'1.5'3'20-MIL PE FLAP (OVERLAP 1 FOOT WITH GEOCOMPOSITE AND WRAP TO TOP OF PIPE)EXTRUSION WELD1'15' WIDTH OF EROSION CONTROL BLANKET IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 CR E S T D I V E R S I O N B E R M NO T T O S C A L E 1 D- 2 . 4 CR E S T D I V E R S I O N B E R M A T D O W N P I P E NO T T O S C A L E 2 D- 2 . 4 FINAL COVER DETAILS D-2.4 TO P D E C K D I V E R S I O N B E R M A N D U N D E R D R A I N NO T T O S C A L E 3 D- 2 . 4 --- NO T E S : 1. C H I M N E Y D R A I N R I S E R E X T E N S I O N S T O B E 8 " D I A . P E R F O R A T E D D R 1 7 P I P E C O N N E C T E D W I T H EL E C T R O F U S I O N C O U P L I N G S O R S L I P C O U P L I N G S S E C U R E D B Y 8 S C R E W S M I N I M U M . 2. V E R T I C A L E X T E N S I O N S O F T H E C H I M N E Y D R A I N M A Y B E M A D E I N 5 O R 1 0 F O O T I N C R E M E N T S . 3. W R A P P I P E E X T E N S I O N S W I T H 3 ' W I D T H O F 2 0 0 - M I L H D P E G E O N E T S E C U R E D W I T H N Y L O N C A B L E T I E S AR O U N D T H E C I R C U M F E R E N C E . T H E N W R A P W I T H 3 - F T W I D T H O F H Y B R I D G E O T E X T I L E S E C U R E D WIT H N Y L O N C A B L E T I E S A R O U N D T H E C I R C U M F E R E N C E . H Y B R I D G E O T E X T I L E S H A L L B E N O M I N A L 1 3 OZ / S Y C O M P O S I T E O F N E E D L E P U N C H E D N O N - W O V E N G E O T E X T I L E M A T E R I A L . S I N G L E - S I D E D GE O N E T / H Y B R I D G E O T E X T I L E C O M P O S I T E M A Y B E U S E D . 4. I N S T A L L S O L I D W A L L C O L L E C T O R P I P E S W I T H A M I N I M U M 2 . 0 % S L O P E U N L E S S O T H E R W I S E D I R E C T E D . 5. P E R F O R A T I O N S S H A L L B E 0 . 2 5 - I N C H D I A M E T E R S P A C E D A T 3 - I N C H E S A L O N G T H E P I P E A X I S A N D A T 4 5 DE G R E E S A R O U N D T H E P I P E C I R C U M F E R E N C E F O R A T O T A L O F 8 H O L E S E V E R Y 3 I N C H E S . 6. I F D R A I N A G E M A T E R I A L I S C H A N G E D B E T W E E N T Y P I C A L A N D A L T E R N A T E F O R A C H I M N E Y D R A I N , T H E BO T T O M A S H A N D 7 8 M A G G R E G A T E W I L L B E S E P A R A T E D B Y A 1 ' T H I C K L A Y E R O F A S T M C - 3 3 F I N E AG G R E G A T E . 1% ( M I N . ) 1.0 ' T Y P . FIL T E R W R A P ( S E E N O T E 3 ) WA S T E 8" N O N - P E R F O R A T E D DR 1 7 H D P E C O L L E C T O R PIP E ( S E E N O T E 4 ) 8"X 8 " H D P E T E E BO T T O M A S H F O R 5 ' R A D I U S B E Y O N D P I P E 8" P E R F O R A T E D D R 1 7 H D P E P I P E (S E E N O T E 5 ) 1% ( M I N . ) TY P I C A L AL T E R N A T E 1.0 ' T Y P . WA S T E FIL T E R W R A P ( S E E N O T E 3 ) 8" N O N - P E R F O R A T E D DR 1 7 H D P E C O L L E C T O R PIP E ( S E E N O T E 4 ) 8" X 8 " H D P E T E E AS T M C - 3 3 F I N E AG G R E G A T E 8" P E R F O R A T E D D R 1 7 H D P E P I P E (S E E N O T E 5 ) NC D O T 7 8 M A G G R E G A T E 2.5 ' 1% ( M I N . ) 2.5 ' 1% ( M I N . ) NOTES:1. C H I M N E Y D R A I N R I S E R E X T E N S I O N S T O B E 8 " D I A . P E R F O R A T E D D R 1 7 P I P E C O N N E C T E D W I T H ELECTROFUSION COUPLINGS OR SLIP COUPLINGS SECURED WITH 8 SCREWS MINIMUM.2. V E R T I C A L E X T E N S I O N S O F T H E C H I M N E Y D R A I N M A Y B E M A D E I N 5 O R 1 0 F O O T I N C R E M E N T S . 3. W R A P P I P E E X T E N S I O N S W I T H 3 ' W I D T H O F 2 0 0 - M I L H D P E G E O N E T S E C U R E D W I T H N Y L O N C A B L E T I E S AROUND THE CIRCUMFERENCE. THEN WRAP WITH 3-FT WIDTH OF HYBRID GEOTEXTILE SECURED WITH NYLON CABLE TIES AROUND THE CIRCUMFERENCE. HYBRID GEOTEXTILE SHALL BE NOMINAL 13 OZ/SY COMPOSITE OF NEEDLE PUNCHED NON-WOVEN GEOTEXTILE MATERIAL. SINGLE-SIDED GEONET/HYBRID GEOTEXTILE COMPOSITE MAY BE USED.4. I N S T A L L S O L I D W A L L C O L L E C T O R P I P E S W I T H A M I N I M U M 2 . 0 % S L O P E U N L E S S O T H E R W I S E D I R E C T E D . 5. P E R F O R A T I O N S S H A L L B E 0 . 2 5 - I N C H D I A M E T E R S P A C E D A T 3 - I N C H E S A L O N G T H E P I P E A X I S A N D A T 4 5 DEGREES AROUND THE PIPE CIRCUMFERENCE FOR A TOTAL OF 8 HOLES EVERY 3 INCHES.6. I F D R A I N A G E M A T E R I A L I S C H A N G E D B E T W E E N T Y P I C A L A N D A L T E R N A T E F O R A C H I M N E Y D R A I N , T H E BOTTOM ASH AND 78M AGGREGATE WILL BE SEPARATED BY A 1' THICK LAYER OF ASTM C-33 FINE AGGREGATE. 1.0 ' T Y P . FIL T E R W R A P ( S E E N O T E 3 ) WA S T E 8" N O N - P E R F O R A T E D D R 1 7 HD P E C O L L E C T O R P I P E (S E E N O T E 4 ) BOTTOM ASH FOR 5' RADIUS BEYOND PIPE8" PERFORATED DR17 HDPE PIPE (SEE NOTE 5)1% (MIN.) 1% ( M I N . ) TY P I C A L FILTER WRAP (SEE NOTE 3)WASTE 8" NON-PERFORATED DR17 HDPE COLLECTOR PIPE (SEE NOTE 4)ASTM C-33 FINE AGGREGATE8" PERFORATED DR17 HDPE PIPE (SEE NOTE 5)1.0' TYP.ALTERNATE1% (MIN.)2.5'2.5'1% (MIN.)NCDOT 78M AGGREGATE 90° ELBOW, 8"Ø DR17 HDPE 90 ° E L B O W , 8 " Ø D R 1 7 H D P E 26 ' PR O J E C T I O N O F O N E O F T H R E E 2 4 " C P P C U L V E R T S DO W N P I P E D P - 1 4 IN T E R I M C O V E R DO W N P I P E S E C T I O N 3 D-1 . 2 EX I S T I N G L I N E R S Y S T E M EX I S T I N G IN T E R I M BE R M EL E V . 5 2 0 . 0 EL E V . 5 2 6 . 0 RE I N F O R C E D C O N C R E T E EN E R G Y D I S S I P A T O R AN D H E A D W A L L NO T E S : 1. I N S T A L L W E E P H O L E S T H R O U G H H E A D W A L L S A S N E E D E D T O A L L O W DR A I N A G E F R O M P E R I M E T E R R O A D A N D L A N D F I L L S L O P E . PR O J E C T I O N O F F I N A L CO V E R G R A D E EX I S T I N G G R A D E 18 " P R O T E C T I V E C O V E R GE O S Y N T H E T I C S 12 " C L A Y L I N E R DETAIL CALLOUT X X-XXDETAIL LEGEND COMPACTED SOIL LINER PROTECTIVE COVER WASTE INTERIM SOIL COVER FINAL SOIL COVER VEGETATIVE SOIL COVER NCDOT 78M DRAINAGE AGGREGATE ASTM C-33 CONCRETE SAND OR BOTTOM ASH RIPRAP COMPACTED ABC STONE GEOSYNTHETIC CLAY LINER (GCL)60-MIL DOUBLE-SIDED TEXTURED HDPE GEOMEM B GEOCOMPOSITE DRAINAGE LAYER GEOTEXTILE EXISTING LINER GEOSYNTHETICS PIPE (HIDDEN)PIPE (EXPOSED)SLOPE CALLOUT 2%STORMWATER AND CHIMNEY DRAIN DETAILS D-3.1 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015 CH I M N E Y D R A I N - I N L I N E NO T T O S C A L E 1 D- 3 . 1 CHIMNEY DRAIN - END OF LINE NOT TO SCALE2 D-3.1 EN E R G Y D I S S I P A T O R A N D H E A D W A L L A T T R I P L E C U L V E R T NO T T O S C A L E 3 D- 3 . 1 --- AN C H O R M A T T I N G I N A 1 2 " T R E N C H JO I N S T R I P S B Y A N C H O R I N G A N D OV E R L A P P I N G 12 " O V E R L A P IN C H A N N E L S , R O L L O U T S T R I P S O F MA T T I N G P A R A L L E L T O T H E D I R E C T I O N O F FL O W . DIR E C T I O N O F ST R E A M F L O W RO L L E D E R O S I O N C O N T R O L P R O D U C T S ( R E C P N O T E S : 1. R E C P C O N S I S T S O F T E M P O R A R Y E R O S I O N C O N T R O L B L A N K E T S ( E C B ) O R L O N G - T E R M T U R F R E I N F O R C E M E N T M A T T I N G ( T R M ) . 2. T R M ( O R R I P R A P ) S H A L L B E I N S T A L L E D I N A R E A S O F C O N C E N T R A T E D F L O W T H A T O V E R T I M E S H O W E R O S I O N . 3. E C B S H A L L B E U S E D O N A L L C U T O R F I L L S L O P E S 3 H : 1 V O R G R E A T E R A N D I N A R E A S S P E C I F I E D O N T H E D R A W I N G S . 4. R E C P S H A L L B E I N S T A L L E D S U C H T H A T M A T E R I A L I S I N I N T I M A T E C O N T A C T W I T H G R O U N D S U R F A C E O V E R E N T I R E C O V E R E D A R E A A N D S H A L L B E MA I N T A I N E D U N T I L VE G E T A T I V E C O V E R I N A R E A H A S B E E N E S T A B L I S H E D . 5. R E C P S H A L L B E I N S T A L L E D A N D M A I N T A I N E D P E R D E T A I L S S H O W N A N D S E C T I O N 6 . 1 7 O F T H E M A Y 2 0 1 3 N C D E N R " E R O S I O N A N D S E D I M E N T C O N T R O L P L A N N I N G A N D D E S I G N MA N U A L . " 6. S E E D I N G A N D M U L C H I N G S H A L L O C C U R , W H E R E A P P L I C A B L E , P R I O R T O I N S T A L L A T I O N O F R E C P . 7. I N D I T C H E S O R C H A N N E L S , R E C P S H A L L B E O V E R L A P P E D S U C H T H A T U P S T R E A M P I E C E O V E R L I E S D O W N S T R E A M P I E C E . 2"- 5 " (5 c m - 1 2 . 5 c m ) 3" (7 . 5 c m ) RO L L E D E R O S I O N C O N T R O L P R O D U C T S I N S T A L L A T I O N TO E I N U P S T R E A M E D G E O F M A T T I N G DIT C H O R C H A N N E L I N S T A L L A T I O N SL O P E I N S T A L L A T I O N 1 D- 4 . 1 W XL1Wp DE F I N I T I O N A S T R U C T U R E D E S I G N E D T O C O N T R O L E R O S I O N A T T H E I N L E T O R O U T L E T O F A C H A N N E L O R C O N D U I T . PU R P O S E TO P R E V E N T E R O S I O N A T T H E O U T L E T O F A C H A N N E L O R C O N D U I T B Y R E D U C I N G T H E V E L O C I T Y O F F L O W A N D D I S S I P A T I N G T H E E N E R G Y . CO N S T R U C T I O N S P E C I F I C A T I O N S 1. E N S U R E T H A T T H E S U B G R A D E F O R T H E F I L T E R A N D R I P R A P F O L L O W S T H E R E Q U I R E D L I N E S A N D G R A D E S S H O W N I N T H E P L A N . C O M P A C T A N Y FIL L R E Q U I R E D I N T H E S U B G R A D E T O T H E D E N S I T Y O F T H E S U R R O U N D I N G D I S T U R B E D M A T E R I A L . L O W A R E A S I N T H E S U B G R A D E O N UN D I S T U R B E D S O I L M A Y A L S O B E F I L L E D B Y I N C R E A S I N G T H E R I P R A P T H I C K N E S S . 2. T H E R I P R A P A N D G R A V E L F I L T E R M U S T C O N F O R M T O T H E S P E C I F I E D G R A D I N G L I M I T S S H O W N O N T H E P L A N S . 3. F I L T E R C L O T H , W H E N U S E D , M U S T M E E T D E S I G N R E Q U I R E M E N T S A N D B E P R O P E R L Y P R O T E C T E D F R O M P U N C H I N G O R T E A R I N G D U R I N G IN S T A L L A T I O N . R E P A I R A N Y D A M A G E B Y R E M O V I N G T H E R I P R A P A N D P L A C I N G A N O T H E R P I E C E O F F I L T E R C L O T H O V E R T H E D A M A G E D A R E A . A L L CO N N E C T I N G J O I N T S S H O U L D O V E R L A P A M I N I M U M O F 1 F T . I F T H E D A M A G E I S E X T E N S I V E , R E P L A C E T H E E N T I R E F I L T E R C L O T H . 4. R I P R A P M A Y B E P L A C E D B Y E Q U I P M E N T , B U T T A K E C A R E T O A V O I D D A M A G I N G T H E F I L T E R . 5. T H E M I N I M U M T H I C K N E S S O F T H E R I P R A P S H O U L D B E 1 . 5 T I M E S T H E M A X I M U M S T O N E D I A M E T E R . 6. R I P R A P M A Y B E F I E L D S T O N E O R R O U G H Q U A R R Y S T O N E . I T S H O U L D B E H A R D , A N G U L A R , H I G H L Y W E A T H E R - R E S I S T A N T A N D W E L L G R A D E D . 7. C O N S T R U C T T H E A P R O N O N Z E R O G R A D E W I T H N O O V E R F A L L A T T H E E N D . M A K E T H E T O P O F T H E R I P R A P A T T H E D O W N S T R E A M E N D L E V E L W I T H TH E R E C E I V I N G A R E A O R S L I G H T L Y B E L O W I T . 8. E N S U R E T H A T T H E A P R O N I S P R O P E R L Y A L I G N E D W I T H T H E R E C E I V I N G S T E A M A N D P R E F E R A B L Y S T R A I G H T T H R O U G H O U T I T S L E N G T H . I F A CU R V E I S N E E D E D T O F I T S I T E C O N D I T I O N S , P L A C E I N T H E U P P E R S E C T I O N O F T H E A P R O N . 9. I M M E D I A T E L Y A F T E R C O N S T R U C T I O N , S T A B I L I Z E A L L D I S T U R B E D A R E A S W I T H V E G E T A T I O N . MA I N T E N A N C E IN S P E C T R I P R A P O U T L E T S T R U C T U R E S A F T E R H E A V Y R A I N S T O S E E I F A N Y E R O S I O N A R O U N D O R B E L O W T H E R I P R A P H A S T A K E N P L A C E O R I F ST O N E S H A V E B E E N D I S L O D G E D . I M M E D I A T E L Y M A K E A L L N E E D E D R E P A I R S T O P R E V E N T F U R T H E R D A M A G E . RE F E R E N C E N.C . E R O S I O N A N D S E D I M E N T A T I O N C O N T R O L P L A N N I N G A N D D E S I G N M A N U A L , 2 0 0 6 . ROCK RIPRAP d50 = VARIES UNDERLAIN WITH 8 OZ/SY NON-WOVEN GEOTEXTILE ROCK RIP-RAP 8 OZ/SY NON-WOVEN GEOTEXTILE RIP RAP OUTLET PROTECTION 2 D-4.1L₂FLARED END SECTION RIP RAP (D 50)1M 1MB D X (MIN.)GEOTEXTILE SEPARATOR (SEE NOTE 1)1 1MB DM ROLLED EROSION CONTROL PRODUCT (RECP)(SEE NOTE 2) RIP RAP LINED CHANNELS RECP LINED CHANNELS NO T E S : 1. E R O S I O N S T O P S ( 8 " D E E P ) P L A C E D A T E V E R Y 2 5 L I N E A R F E E T . 2. F O R A N C H O R A G E O F R E C P , S E E D E T A I L 1 D- 4 . 1 DRAINAGE CHANNEL 3 D-4.1 EROSION CONTROL DETAILS D-4.1 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015--- PHASE 1 PHASE 2 PHASE 3 PH A S E 4 PHASE 5 PHASE 6AA'B B' 40 0 42 5 45 0 47 5 50 0 52 5 55 0 57 5 60 0 62 5 65 0 67 5 70 0 400425450475500525550575600625650675700 0+ 0 0 0 + 5 0 1 + 0 0 1 + 5 0 2 + 0 0 2 + 5 0 3 + 0 0 3 + 5 0 4 + 0 0 4 + 5 0 5 + 0 0 5 + 5 0 6 + 0 0 6 + 5 0 7 + 0 0 7 + 5 0 8 + 0 0 8 + 5 0 9 + 0 0 9 + 5 0 1 0 + 0 0 1 0 + 5 0 1 1 + 0 0 1 1 + 5 0 1 2 + 0 0 1 2 + 5 0 1 3 + 0 0 1 3 + 5 0 1 4 + 0 0 1 4 + 5 0 1 5 + 0 0 1 5 + 5 0 1 6 + 0 0 1 6 + 5 0 1 7 + 0 0 1 7 + 5 0 1 8 + 0 0 1 8 + 5 0 1 9 + 0 0 1 9 + 5 0 2 0 + 0 0 2 0 + 5 0 2 1 + 0 0 2 1 + 5 0 2 2 + 0 0 2 2 + 5 0 2 3 + 0 0 2 3 + 5 0 2 4 + 0 0 2 4 + 5 0 24+75 SE A S O N A L H I G H GR O U N D W A T E R EL E V A T I O N (R E F E R E N C E 7 ) HIS T O R I C P R E - B A S I N TO P O G R A P H Y (R E F E R E N C E 8 ) PHASE 6 LINER GRADE PH A S E S 1 - 5 L I N E R G R A D E PROPOSED PHASE 6 FINAL COVER GRADE CU R R E N T L Y P E R M I T T E D PH A S E S 1 - 5 F I N A L C O V E R G R A D E PH A S E S 1 - 5 PH A S E 6 PR O P O S E D P H A S E S 1 - 5 IN T E R M E D I A T E G R A D E EX I S T I N G G R A D E (R E F E R E N C E 2 ) LE A C H A T E C O L L E C T I O N PIP E L P - 1 LE A C H A T E C O L L E C T I O N PIP E L P - 2 LE A C H A T E C O L L E C T I O N PIP E L P - 3 LE A C H A T E C O L L E C T I O N PIP E L P - 4 LE A C H A T E C O L L E C T I O N PIP E L P - 5 LEACHATE COLLECTION PIPE LP-6 LEACHATE COLLECTION PIPE LP-7 PR O P O S E D FIN A L C O V E R GR A D E CU R R E N T L Y P E R M I T T E D PH A S E 6 F I N A L C O V E R G R A D E 24+50SOUTHBERM PH A S E 6 V E R T I C A L E X P A N S I O N PO N D A S H UN L I N E D MO N O F I L L PH A S E 6 S T R U C T U R A L F I L L TA C K - O N B E N C H (T Y P . ) AP P R O X I M A T E E L E V . 4 7 0 F T 45 0 47 5 50 0 52 5 55 0 57 5 60 0 62 5 65 0 67 5 70 0 45 0 47 5 50 0 52 5 55 0 57 5 60 0 62 5 65 0 67 5 70 0 0+ 0 0 0 + 5 0 1 + 0 0 1 + 5 0 2 + 0 0 2 + 5 0 3 + 0 0 3 + 5 0 4 + 0 0 4 + 5 0 5 + 0 0 5 + 5 0 6 + 0 0 6 + 5 0 7 + 0 0 7 + 5 0 8 + 0 0 8 + 5 0 9 + 0 0 9 + 5 0 1 0 + 0 0 1 0 + 5 0 1 1 + 0 0 1 1 + 5 0 1 2 + 0 0 1 2 + 5 0 1 3 + 0 0 1 3 + 5 0 1 4 + 0 0 1 4 + 5 0 1 5 + 0 0 1 5 + 5 0 1 6 + 0 0 1 6 + 5 0 16 + 7 5 SE A S O N A L H I G H GR O U N D W A T E R EL E V A T I O N (R E F E R E N C E 7 ) HIS T O R I C P R E - B A S I N TO P O G R A P H Y (R E F E R E N C E 8 ) PH A S E 6 L I N E R G R A D E (R E F E R E N C E 6 ) PR O P O S E D PH A S E 6 F I N A L CO V E R G R A D E PH A S E 6 EX I S T I N G G R A D E (R E F E R E N C E 2 ) CU R R E N T L Y P E R M I T T E D PH A S E 6 F I N A L C O V E R G R A D E 16 + 5 0 PH A S E 6 V E R T I C A L E X P A N S I O N PO N D A S H PO N D A S H PH A S E 6 S T R U C T U R A L F I L L EA S T B E R M IN T E R I M BE R M TA C K - O N B E N C H (T Y P . ) 3 1 SE E N O T E 1 AP P R O X I M A T E E L E V . 4 7 0 F T CROSS SECTIONS X-1.1 IS S U E / R E V I S I O N D E S C R I P T I O N Y RE V D M EN G . A P P R . CL I E N T L O G O : REVIEWED BY:SCALE:DATUM:PROJECTION:TITLE:PROJECT:DATE:DRAWING NO.REVISION NO.PROJECT NO.:DRAWN BY: CL I E N T : 28 0 1 Y O R K M O N T R O A D , S U I T E 1 0 0 CH A R L O T T E , N C 2 8 2 0 8 TE L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 LIC E N S U R E : N C E N G . F - 1 2 5 3 N C G E O L O G Y : C - 2 4 7 Am e c F o s t e r W h e e l e r E n v i r o n m e n t & I n f r a s t r u c t u r e , I n c . 7810-15-0381 ROXBORO INDUSTRIAL LANDFILL PHASE 6 VERTICAL EXPANSION DU K E E N E R G Y P R O G R E S S PE R S O N C O U N T Y , N C PE R M I T S U B M I T T A L 20 1 5 0 15 1 0 TB M M S AS SHOWNNAD83 - NAVD88 ---SLS TBM010/15/2015CROSS SECTION LOCATION PLAN CR O S S S E C T I O N A - A ' ( W E S T T O E A S T ) CR O S S S E C T I O N B - B ' ( N O R T H T O S O U T H REFERENCES 1. A L L M A P P I N G I S N . C . S T A T E P L A N E C O O R D I N A T E S N A D 8 3 A N D N A V D 8 8 . 2. E X I S T I N G T O P O G R A P H Y I S F R O M A P R I L 1 , 2 0 1 5 A E R I A L S U R V E Y B Y W S P . 3. L I M I T O F P H A S E S 1 - 5 L I N E R L O C A T I O N O B T A I N E D F R O M D R A W I N G E N T I T L E D “FACILITY PLAN PHASE 1-5” PREPARED BY BLACKROCK ENGINEERS DATED AUGUST 16, 2013, CONVERTED TO NAD83/NAVD88.4. L I M I T O F P H A S E 6 L I N E R L O C A T I O N O B T A I N E D F R O M D R A W I N G E N T I T L E D “RECORD SURVEY - TOP OF PROTECTIVE COVER - 0-7021” PREPARED BY BLACKROCK ENGINEERS, DATED SEPTEMBER 24, 2014, CONVERTED TO NAD83/NAVD88.5. P H A S E S 1 - 5 L I N E R G R A D E S OBTAINED FROM DRAWING ENTITLED “BASE GRADING PLAN” PREPARED BY GARY W. AHLBERG, P.E., DATED MAY 17,2002, CONVERTED TO NAD83/NAVD88.6. T O P O F S O I L L I N E R G R A D E S F O R P H A S E 6 O B T A I N E D F R O M D R A W I N G ENTITLED "GRADING PLAN LINER GRADES AND LEACHATE COLLECTION PLAN", REV. 3, RECORD ISSUE, PREPARED BY BLACKROCK ENGINEERS DATED OCTOBER 9, 2014.7. S E A S O N A L H I G H G R O U N D W A T E R E L E V A T I O N S H O W N R E P R E S E N T S CONDITIONS FROM DECEMBER 2012, AS SHOWN IN A DRAWING ENTITLED "SEASONAL HIGH POTENTIOMETER MAP 0-7021", PREPARED BY BLACKROCK ENGINEERS, DATED AUGUST 16, 2013.8. H I S T O R I C P R E - B A S I N T O P O G R A P H Y B A S E D O N D R A W I N G D - 4 5 0 3 E N T I T L E D "ROXBORO STEAM ELECTRIC PLANT DRY FLY ASH MODIFICATION GENERAL SITE ARRANGEMENT PLAN" PREPARED BY CAROLINA POWER AND LIGHT COMPANY, REV. 4, DATED NOVEMBER 15, 1990.LEGENDNOTES1. C R O S S S E C T I O N S M A Y B E S K E W E D T O T H E F I N A L S L O P E O R O T H E R FEATURES RESULTING IN DISTORTED SLOPES AND DISTANCES WHEN COMPARED TO (NORMAL) PLAN DIMENSIONS.FINAL COVER GRADE CURRENTLY PERMITTED FINAL COVER GRADE LINER GRADE HISTORIC PRE-BASIN TOPOGRAPHY SEASONAL HIGH GROUNDWATER EXISTING GRADE E L E V A T I O N ( F E E T ) E L E V A T I O N ( F E E T ) N APPENDIX III Closure/Post-Closure Plan Prepared For: Duke Energy Progress, LLC 526 S. Church St. Charlotte, NC 28202 Date October 15, 2015 Prepared By: Amec Foster Wheeler 2801 Yorkmont Rd., Charlotte, NC 28208 Closure and Post-Closure Plan Roxboro Industrial Landfill (SW Permit No. 7302) Duke Energy Progress– Roxboro Steam Station Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Amec Foster Wheeler Project No. 7810150381 TOC October 15, 2015 Table of Contents 1 INTRODUCTION ................................................................................................................................... 1 1.1 Project Information ........................................................................................................................ 1 2 CLOSURE PLAN ................................................................................................................................... 1 2.1 Description of Cover System ......................................................................................................... 1 2.1.1 Vegetative Soil Cover ................................................................................................................ 1 2.1.2 Final Cover Soil ......................................................................................................................... 1 2.1.3 Geocomposite Drainage Layer ................................................................................................. 1 2.1.4 Geomembrane .......................................................................................................................... 1 2.1.5 Intermediate Cover .................................................................................................................... 1 2.2 Gas Management System ............................................................................................................. 2 2.3 Stormwater Management System ................................................................................................. 2 2.4 Largest Area Requiring Cover System ......................................................................................... 2 2.5 Estimated Maximum Waste Inventory........................................................................................... 2 2.6 Closure Schedule .......................................................................................................................... 2 3 POST-CLOSURE PLAN ........................................................................................................................ 3 3.1 Maintenance Activities .................................................................................................................. 3 3.2 Inspection Activities ....................................................................................................................... 3 3.2.1 Groundwater and Surface Water Monitoring............................................................................. 3 3.3 Facility Contact Information ........................................................................................................... 3 3.4 Anticipated Post-Closure Use ....................................................................................................... 4 3.5 Cost Estimate for Closure and Post-Closure Activities ................................................................. 4 3.6 Certification ................................................................................................................................... 4 List of Figures Figure 1 Site Map List of Appendices Appendix I Post-Closure Inspection Form Appendix II Cost Estimate for Closure and Post-Closure Activities Closure & Post Closure Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Page 1 of 4 October 15, 2015 1 Introduction This Closure and Post-Closure Plan is being submitted as part of the Phase 6 Vertical Expansion Application and was prepared for the Roxboro Industrial Landfill in accordance with Title 15A Subchapter 13B of the North Carolina Administrative Code (NCAC) to meet the requirements of .0503(2), .0504(2), and .0505 for industrial landfills. The information contained in this plan will be used to assist Duke Energy Progress (Duke) in the closure of the landfill and the maintenance and monitoring required during the post-closure care period. 1.1 Project Information The Roxboro Industrial Landfill consists of Phases 1 through 6 totaling approximately 93 acres of lined area. A vertical expansion of Phase 6 is proposed. The general location of the Roxboro Industrial Landfill is shown on Figure 1. 2 Closure Plan The landfill cover system has been designed to reduce infiltration into the landfill and to resist erosion. The proposed landfill cover system components, size, and closure schedule are described in the following sections of this report. 2.1 Description of Cover System The proposed cover system will consist of the following components, from top to bottom: ► 6-inch thick vegetative soil cover; ► 18-inch thick final cover soil; ► Geocomposite drainage layer; ► 40-mil thick double-sided textured linear low density polyethylene (LLDPE) geomembrane; and ► Intermediate soil cover layer (no minimum thickness). 2.1.1 Vegetative Soil Cover The vegetative soil layer will consist of 6 inches of soil materials capable of sustaining vegetation, which will promote the integrity of the cover system by resisting erosion. 2.1.2 Final Cover Soil The final cover soil layer will consist of 18 inches of soil materials. The final cover soil layer will protect the geosynthetic components of the cover system from exposure. 2.1.3 Geocomposite Drainage Layer A geocomposite drainage layer will be located beneath the final cover soil layer. The geocomposite will promote veneer stability and reduce infiltration through the closed landfill by conveying infiltration to regularly spaced geocomposite outlets. 2.1.4 Geomembrane A 40-mil thick double-sided textured LLDPE geomembrane barrier will be installed between the geocomposite drainage layer and the interim cover to minimize infiltration through the closed landfill. The geomembrane will have texturing on both sides to improve veneer stability. 2.1.5 Intermediate Cover A 12-inch thick intermediate soil cover will be placed during landfill operations prior to cover system construction. At the time of final closure, there is no minimum thickness of intermediate cover required. Closure & Post Closure Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Page 2 of 4 October 15, 2015 2.2 Gas Management System The majority of waste disposed in the Roxboro Industrial Landfill will consist CCR materials consisting of fly ash and bottom ash. Based on the nature of CCR materials and our experience it is not anticipated that landfill gases such as methane or hydrogen sulfide gas will be generated or that nuisance odors will be an issue. Therefore, Duke does not propose monitoring for landfill gas or landfill gas management measures. 2.3 Stormwater Management System The proposed Roxboro Industrial Landfill is designed with stormwater conveyances to manage runoff for active landfill operations, interim closure, and final closure conditions. Upon final closure, stormwater will be collected by tack-on benches and conveyed to a series of down pipes which will discharge to the perimeter channel system. Plans and details illustrating the stormwater management system are provided in the Engineering Plan drawings. 2.4 Largest Area Requiring Cover System The proposed Roxboro Industrial Landfill will be operated until closure. The largest area requiring cover system construction is the entire footprint of the proposed landfill which is approximately 93 acres in plan area. 2.5 Estimated Maximum Waste Inventory The proposed landfill design provides approximately 9,412,000 cubic yards of gross capacity as measured from the top of the protective cover soil to the top of final cover. 2.6 Closure Schedule Following the completion of waste placement, a final cover system will be constructed. The primary purpose of a final cover system is to minimize infiltration into the waste. The proposed final cover system cross section is presented in the Engineering Plan Drawings. Final closure of the landfill will commence when final design grades are achieved, Duke declares that no more waste will be accepted, or as directed by the North Carolina Department of Environment and Natural Resources (NCDENR) Division of Waste Management – Solid Waste Section (the Division). Duke may elect to close the landfill incrementally during landfill operations once an area large enough to warrant cover system construction has reached final grades. Prior to beginning closure of the proposed landfill, the Owner or Operator shall notify the Division that a notice of intent to close the landfill has been placed in the operating record. Closure activities for the landfill shall begin no later than 30 days after final receipt of waste unless otherwise approved by the Division or, if the landfill has remaining capacity and there is a reasonable likelihood that the landfill will receive additional wastes, no later than one year after the most recent receipt of wastes. Extensions beyond the one-year deadline for beginning closure may be granted by the Division if the Owner or Operator demonstrates that the landfill has the capacity to receive additional wastes and the Owner or Operator has taken and will continue to take the steps necessary to prevent threats to human health and the environment from the unclosed landfill. The final cover system will be finished within 180 days following the beginning of closure activities unless otherwise approved by the Division. Extensions of the closure period may be granted by the Division if the Owner or Operator demonstrates that closure will, of necessity, take longer than 180 days and they have taken and will continue to take the necessary steps to prevent threats to human health and the environment from the unclosed landfill unit. The final cover system for the closed phase will be certified by a professional engineer as being completed. Duke Energy shall record a notation on the deed to the landfill property stating that the property has been used as a landfill and its use is restricted under the Closure/Post-Closure Plan approved by the Division. The Division will be notified by Duke Energy of the closure completion, certification, deed notation, and placement of these records into the landfill’s operating record. Closure & Post Closure Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Page 3 of 4 October 15, 2015 Following cover system construction, the landfill will be vegetated with grass and maintained. If the landfill must be closed prior to reaching the final contours, the surface of the landfill will be sloped to a minimum grade of 5 percent and maximum grade of 33.33 percent (3H:1V). A final cover will be established over the landfill unit being closed. The maximum waste-filled area of the proposed landfill that would require closure operations at any one time is approximately 93 acres in plan area, which is the entire footprint of the proposed Roxboro Industrial Landfill. 3 Post-Closure Plan The Post-Closure Plan outlines the monitoring and maintenance activities intended to maintain cover system integrity during the post-closure care period. Consistent with the requirements of MSW landfill rules, the proposed post-closure period is 30 years. During the post-closure period, the landfill cover system and related facilities must be monitored and maintained. 3.1 Maintenance Activities Maintenance activities will be conducted as soon as practical to address items of concern identified during monitoring events. Mowing will occur at a minimum once per year, other maintenance activities will be performed as needed and are anticipated to include the following: ► Filling in animal burrows and re-locating the animal; ► Localized placement of fill to prevent ponding of water caused by differential settlement; ► Removal of trees or brushy vegetation within the cover system limits; ► Application of seed and soil amendments to maintain a healthy vegetative cover; and ► Repair of stormwater conveyance measures. Any disturbed areas will be seeded and soil amendments applied as necessary to establish a healthy vegetative cover. 3.2 Inspection Activities Post-closure inspection events will be conducted quarterly for the first two years and semi-annually thereafter during the post-closure care period. Post-closure inspections will include a review of the following: ► The condition of site security features such as gates and/or fencing; ► Evidence of erosion, settlement, and/or animal burrows within the cover system; ► Type and quality of vegetation within the cover system; ► Evidence of erosion and integrity of stormwater conveyance features; and ► Integrity of the leachate collection and removal system (LCRS). The inspection events will be documented. The form included in Appendix I may be used. Completed post-closure inspection forms will be maintained in the facility operating record. 3.2.1 Groundwater and Surface Water Monitoring Groundwater and surface water monitoring requirements are described in the Monitoring Plan dated August 2013. 3.3 Facility Contact Information Duke will be responsible for post-closure inspections, maintenance and monitoring. Correspondence regarding the Roxboro Industrial Landfill should be directed to: Duke Energy Progress, LLC Roxboro Steam Station 1700 Dunnaway Road Semora, North Carolina 27343 Closure & Post Closure Plan Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Page 4 of 4 October 15, 2015 (336) 597-6172 System Owner for Landfill Operations The physical address of the Roxboro Industrial Landfill is the same as above. 3.4 Anticipated Post-Closure Use The Roxboro Industrial Landfill will be vegetated following closure. Site access to the public will remain restricted throughout landfill closure and the post-closure care period. There are no current anticipated post-closure uses for the Roxboro Industrial Landfill. Duke Energy will obtain approval from NCDENR if a proposed post-closure use is identified. 3.5 Cost Estimate for Closure and Post-Closure Activities Preliminary cost estimates for landfill closure and for post-closure care activities are presented in Appendix II. In accordance with North Carolina Solid Waste Management Rules, Duke Energy Progress provides financial assurance in the form of the Corporate Financial Test. Cost estimates for financial assurance will be updated annually to incorporate changes to unit costs and changes in closed landfill area. 3.6 Certification Consistent with regulations, the end of the closure/post-closure care period must be certified by a registered professional engineer. To accomplish certification over the required 30-year duration, a registered professional engineer will prepare annual certifications. The annual certifications will document that the cover system has been monitored and maintained in accordance with the Post-Closure Plan. The annual certifications shall be based on observations and results documented on regular post-closure monitoring reports, maintenance records, and compliance monitoring reports maintained in the Operating Record. Quantity1 Unit Cost2 Total Final Cover System Remove 18" of Existing 24" Cover over 22.0 AC 53,200 CY 8.00$          425,600$         Remove 6" of Existing 12" Cover over 72.4 AC 58,400 CY 8.00$          467,200$         Fine Grading for Geomembrane Subgrade 94.4 AC 3,800.00$  358,720$         Vegetative Layer (6" thick)76,100 CY 11.00$        837,100$         Protective Cover (18" thick)228,400 CY 5.50$          1,256,200$     Drainage Geocomposite 4,112,000 SF 0.98$          4,029,760$     40‐mil Text. LLDPE Geomembrane 4,112,000 SF 0.63$          2,590,560$     Temporary Erosion Control 94.4 AC 4,300.00$  405,920$         Stormwater Management3 Grass‐Lined Channels (benches)9,300 LF 24.00$        223,200$         Tack‐On Benches 9,200 LF 35.00$        322,000$         Perimeter Channel 3,400 LF 30.00$        102,000$         Slope Drains (18" CPP)8,700 LF 35.00$        304,500$         Rip Rap Outlet Protection 4 EA 2,000.00$  8,000$             Drainage Inlets 43 EA 3,500.00$  150,500$         North & West Ramp and Top Deck Road Stone (30  ft x 3165 ft, 1.5 TN/LF)4,700 TN 38.00$         178,600$         Perimeter Road Stone (20 ft x 2394 ft, 1.5 TN/LF)3,600 TN 38.00$        136,800$         Perimeter Road Stone (30 ft x 1348 ft, 1.5 TN/LF) 2,000 TN 38.00$        76,000$           North & West Ramp and Top Deck Road Rip Rap  Channels 2,700 LF 36.00$         97,200$           Surveying 94.4 AC 1,400.00$  132,160$         Permanent Vegetative Stabilization 94.4 AC 1,800.00$  169,920$         Subtotal 12,271,940$   Mobilization (5% of Subtotal)613,597$         Engineering and CQA (12% of Subtotal)1,472,633$     Contingency (15% of Subtotal)1,840,791$     TOTAL 16,198,961$   COST PER ACRE 171,599.16$   Notes: 1. Areas include slope correction factor of 1.03. 2. Costs are based on 2015 dollars. 3. It is assumed that existing slope drains, inlet structures and rip rap outlet protection will replaced at      the time of final cover construction. However, structures in good condition may remain in service. October 2015 Table 1 Closure Cost Estimate Roxboro Industrial Landfill Phases 1‐6 Permit No. 7302 Semora, North Carolina Quantity Unit Unit Cost1 Annual Cost Compliance Monitoring Reporting2 Reporting and Administration 1 LS 9,500$      9,500$           Compliance Monitoring Sampling and Analytical (semi‐annual)2 Groundwater3 6 Well 1,500$       9,000$           Leachate4 6 Location 500$          3,000$           Maintenance (annual) Fencing, Gates, Signs, etc.1 LS 1,000$      1,000$           Access Roads 1 LS 5,000$      5,000$           Mowing 94.4 AC 100$         9,440$           Stormwater Structures 1 LS 5,000$      5,000$           Leachate Collection Pipe Cleaning and  Camera Inspection5 Every 5th  Year Event 17,500$     3,500$           Groundwater Monitoring Wells 1 LS 3,000$      3,000$           Final Cover System6 94.4 AC 1,500$       141,600$       Annual Permit Fee 1 EA 500$         500$               Subtotal 190,540$       Mobilization (5% of Subtotal)9,527$           Engineering and CQA (12% of Subtotal)22,865$         Contingency (15% of Subtotal)28,581$         ANNUAL TOTAL 251,513$       30‐YEAR TOTAL 7,545,384$   Notes: 1. Costs are based on 2015 dollars. 2. The sampling, analytical and reporting costs are based on actual 2015 costs. 3. The monitored wells are GMW‐6, 7, 8, 9, 10 and 11. 4. All leachate discharge points (LP‐1 through LP‐6) are monitored. 5. It is assumed that a post‐closure pipe cleaning schedule of every 5 years will be approved. 6. Final cover system maintenance assumes erosion repair and seeding for 25 percent of      the cover annually. October 2015 Table 2 Post‐Closure Cost Estimate Roxboro Industrial Landfill Phases 1‐6 Permit No. 7302 Semora, North Carolina Quantity Unit Unit Cost1 Annual Cost Assessment Monitoring Reporting Reporting and Administration2 1 LS 19,000$        19,000$             Assessment Monitoring Sampling and Analytical (annual) Groundwater3,4 6 Well 1,500$          9,000$               Subtotal 28,000$             Contingency (15% of Subtotal)4,200$               ANNUAL TOTAL 32,200$             30‐YEAR TOTAL 966,000$          REQUIRED MINIMUM 2,000,000$       Notes: 1. Costs are based on 2015 dollars. 2. The assessment reporting cost is assumed to be twice the cost for routine reporting. 3. The monitored wells are GMW‐6, 7, 8, 9, 10 and 11. 4. The assessment sampling and analytical costs are estimated to be twice the routine cost per well.  October 2015 Table 3 Potential Assessment and Corrective Active Costs Roxboro Industrial Landfill Phases 1‐6 Permit No. 7302 Semora, North Carolina APPENDIX IV Emergency Response Plan (ERP) Prepared For: Duke Energy Progress, LLC 526 S. Church St. Charlotte, NC 28202 Date October 15, 2015 Prepared By: Amec Foster Wheeler 2801 Yorkmont Rd., Charlotte, NC 28208 Emergency Response Plan (ERP) Roxboro Industrial Landfill (SW Permit No. 7302) Duke Energy Progress– Roxboro Steam Station Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Amec Foster Wheeler Project No. 7810150381 TOC October 15, 2015 Table of Contents 1 STATEMENT OF PURPOSE ................................................................................................................ 1 2 PROJECT DESCRIPTION & IMPACTS ................................................................................................ 1 3 SLOPE FAILURE IDENTIFICATION CRITERIA ................................................................................... 1 3.1 Alert Status .................................................................................................................................... 1 3.2 Emergency Status ......................................................................................................................... 1 4 NOTIFICATION SEQUENCE ................................................................................................................ 2 Emergency Response Plan (ERP) Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Page 1 of 2 October 15, 2015 1 Statement of Purpose The purpose of this Emergency Response Plan (ERP) is to provide guidance to identify potential slope failure events of the Roxboro Industrial Landfill, and minimize their impacts within the Roxboro Steam Station property owned by Duke Energy Progress, LLC (Duke Energy). This ERP establishes slope instability identification criteria, identifies emergency response entities, identifies impacted areas, establishes procedures for notification and provides contact information for emergency notifications. This ERP provides a framework for consistent and appropriate response to slope failure events, should they occur. Implementation and familiarity with the elements of the ERP will reduce the risk associated with landfill operations and help to mitigate impacts resulting from slope failure events, should they occur. 2 Project Description & Impacts The landfill is located on the Duke Energy – Roxboro Steam Station property, southeast of the Roxboro Steam Plant and partially within the footprint of the filled east ash pond. Waste fill heights are expected to be on the order of 150 feet with slopes constructed at 3 (horizontal) to 1 (vertical) slopes. The landfill is bounded by Roxboro Steam Station property on all sides. Potentially impacted areas are located on Duke Energy’s Roxboro Steam Station property. 3 Slope Failure Identification Criteria 3.1 Alert Status The following conditions indicate a potential emergency situation. If one or more of these conditions are observed, the owner should initiate Notification Sequence 1 immediately: ► Cracking on landfill slope faces; ► Bulging on landfill slope faces; ► Wet spots, seepage, or flow emerging from or near the landfill slope faces; and ► Shallow sloughing up to about three feet deep. While under Alert Status, the owner shall continuously monitor slope conditions of the landfill. The owner shall communicate regularly with North Carolina Department of Environmental Quality (NCDEQ) personnel and the Engineer. The owner shall evaluate if conditions warrant a transition to Emergency Status, and notify the emergency management authorities. 3.2 Emergency Status The following conditions indicate slope failure is possible. If one or more of these conditions is observed, the owner should initiate Notification Sequence 2 immediately: ► Slope faces in the process of cracking, sliding, or sloughing. ► Turbid seepage (that is, muddy seepage) and or boils emerging from the landfill slope faces or structural fill below the landfill. Emergency Response Plan (ERP) Duke Energy Progress, LLC – Roxboro Steam Station Roxboro Industrial Landfill Semora, Person County, North Carolina Amec Foster Wheeler Project No. 7810150381 Page 2 of 2 October 15, 2015 4 Notification Sequence Sequence 1: If one of the Alert Conditions listed in Section 3.1 of this plan has been observed, but slope failure does not appear imminent then the following notification sequence is followed by the Owner: Sequence 2: If one of the Emergency Conditions listed in Section 3.2 of this plan is occurring or slope failure appears to be otherwise imminent, the following notification sequence is followed by the Owner: In the event of an Emergency Condition, if directed by the station, assemble at the designated Assembly Area.