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1809_Duke_Marshall_PTOAppRevised_DIN26608_20161220
Prepared For: Duke Energy Carolinas, LLC 526 S. Church St., Charlotte, NC 28202 Date August 10, 2016 Prepared By: Amec Foster Wheeler 2801 Yorkmont Rd., Suite 100, Charlotte, NC 28208 Landfill Operations Plan Marshall Flue Gas Desulfurization Residue Landfill (Permit No. 1809-INDUS) Duke Energy Carolinas – Marshall Steam Station Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 M.A. “Mark” Shumpert, PE Amec Foster Wheeler North Carolina Professional Engineering Firm No. F-1253 Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 TOC August 10, 2016 DESCRIPTION OF REVISIONS The Operations Plan was originally submitted to the North Carolina Department of Environmental Quality (NCDEQ) in August of 2011 and modified as shown in the following table: Revision Date of Document Description of Revisions Initial Issue August 19, 2011 Initial issuance of document. Revision 1 December 9, 2011 The following revisions were performed to respond to the Permit to Operate Completeness Determination and Technical Review performed by DENR and to provide consistent requirements for Operational and Intermediate Cover between this landfill and the Marshall Steam Station Industrial Landfill No. 1 Permit No. 1812 (MSS ILF#1). Editorial changes to the text are not noted. Landfill Operations Plan Section 2.1.1—Revised acreage for landfill footprint to 17.9 acres to include stormwater basin. Section 2.1.6.3—Revised to delete reference to cover requirements for asbestos from this section. Section 2.1.8.1—Revised cover requirements for asbestos per NCDEQ comments Section 2.1.8.3 – Revised cover requirements to be consistent with MSS ILF #1 Operations Plan. Section 2.1.8.3—Revised cover requirements to be consistent with MSS ILF#1 Operations Plan. Section 2.1.8.4—Revised cover requirements to be consistent with MSS ILF#1 Operations Plan. Section 2.1.8.5—Deleted previous section (Interim Cover) to be consistent with MSS ILF#1 Operations Plan. (Initial Issue Section 2.1.8.6 Final Cover becomes Section 2.1.8.5). Section 2.7—Revised wording to state that monitoring of landfill gas is not required until the final cover system is installed. Section 6.0—Revised section for 10-Year Waste Management Plan to include annual submittal of implementation report per NCDEQ comments Appendix A Dust Control Plan Section 1.0—Deleted acreage of landfill footprint. Section 2.0—Revised section to delete reference to thickness of soil cover Section 4.0—Revised cover requirements for asbestos per NCDEQ comments Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 TOC August 10, 2016 Revision Date of Document Description of Revisions Revision 1 December 9, 2011 Appendix C Added Letter from Mr. Larry Frost, DENR to Mr. Ed Sullivan, P.E., Duke Energy Carolinas, LLC, dated September 27, 2011, Permit to Operate, Amendment, Five (5) Year Renewal, Completeness Determination and Technical Review, Marshall Steam Station Flue Gas Desulfurization (FGD) Residue Landfill, Permit No. 1809, Catawba County, DIN 15221 Revision 2 November 13, 2013 Landfill Operations Plan Section 1.5 Operating Hours – Included language for Operational Flexibility Section 2.1 Waste Acceptance Revised approved waste and operational process for handling waste Updated intermediate cover requirements Section 2.3 Leachate Collection System – Included chimney drain system and modified leachate collection pipe maintenance plan. Phasing Diagrams – Added chimney drain locations and added Drawing PD-9 for chimney drain details. Revision 3 August 10, 2016 Landfill Operations Plan Section 2.1 Waste Handling and Landfill Sequencing – 2.1.2 Added soil material and geotextile 2.1.5 Updated landfill sequencing 2.1.6.5 Added vacuum truck waste Section 2.5 Stormwater Basin Maintenance Requirements – Removed from Plan Section 4 Vegetation – Updated to site specific vegetation management plan Section 6 Required Regulatory Submittals – Updated the timeline for reporting sampling events Existing Conditions and Dust Control Plan figures updated with 2016 topographic survey mapping Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 TOC August 10, 2016 Table of 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 ................................................................................................................. 9 2.1.9 Groundwater Monitoring Well Access Requirements ............................................................. 10 2.2 Leachate and Stormwater Management ..................................................................................... 10 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 Stormwater Collection and Conveyance ..................................................................................... 11 2.4.1 Stormwater Discharge ............................................................................................................. 11 2.5 Landfill Gas Management ........................................................................................................... 11 3 EROSION AND SEDIMENT CONTROL ............................................................................................. 11 3.1 E&SC Measures Monitoring and Maintenance ........................................................................... 11 3.2 Surface Erosion Monitoring ......................................................................................................... 12 4 VEGETATION MANAGEMENT ........................................................................................................... 13 4.1 Temporary Seeding ..................................................................................................................... 13 4.2 Permanent Seeding .................................................................................................................... 13 4.3 Over-Seeding .............................................................................................................................. 14 5 LANDFILL CLOSURE .......................................................................................................................... 14 6 REQUIRED REGULATORY SUBMITTALS ........................................................................................ 15 Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 TOC August 10, 2016 List of Tables Table 1 Design Drawings Table 2 Lined Landfill Capacity Table 3 Required Regulatory Submittals List of Figures Figure 1 Existing Conditions List of Appendices Appendix I Dust Control Plan Appendix II Engineering Drawings Appendix III Closure/Post-Closure Plan Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 1 of 15 August 10, 2016 1 General Facility Operations 1.1 Overview The purpose of this Operations Plan is to outline a plan for the safe and efficient operations of the Marshall Flue Gas Desulfurization (FGD) Residue 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 Marshall Steam Station is located at 8320 East North Carolina Highway 150 in Terrell, Catawba County, North Carolina. The Marshall FGD Landfill is owned and operated by Duke Energy Carolinas, LLC (Duke). The landfill is located on Marshall Steam Station property, northwest of the Marshall plant and bounded by Steamplant Road to the east and existing railroad track to the west. 1.2 Contact Information Correspondence and questions concerning the operation of the Marshall FGD Landfill should be directed to the appropriate entity as follows: Owner Duke Energy Carolinas, LLC – Marshall Steam Station 8320 East NC Hwy 150, Terrell, NC 28682 (828) 478-7622 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 Marshall FGD Landfill were developed considering the health and safety of the facility’s operating staff. The operating staff receives site-specific safety training prior to landfill operations, and on-site activities are conducted according to the applicable sections of Duke’s Safe Work Practices. 1.4 Access and Security Requirements The Marshall FGD 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, wooded buffers, 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 attention as soon as practical in order to avoid damage to vehicles. Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 2 of 15 August 10, 2016 1.5 Operating Hours The Marshall FGD Landfill is operated seven days a week, as needed. On weekends and holidays when the Landfill Operator may be offsite but when the station wastewater treatment system remains operational, the following conditions apply: ► The Landfill Operator shall place and compact all existing waste in the landfill prior to leaving the site. ► The Landfill Operator shall clearly and visibly indicate the location for weekend clarifier sludge placement in the landfill through use of signs, barrels, or other delineation aid prior to leaving the site. ► Only designated station personnel who are properly equipped and informed shall transport and place clarifier sludge in the landfill during the weekend or holiday. ► A certified Landfill Operator shall be available by phone to address issues should they arise during the weekend or holiday. ► On the first business day following the weekend or holiday, the Landfill Operator shall incorporate any clarifier sludge placed in the FGD Landfill during the weekend or holiday in accordance with the Operations Plan. 1.6 Signs A sign providing the landfill permit number, hours of operation, and a statement reading, “NO HAZARDOUS OR LIQUID WASTE PERMITTED” is posted at the site entrance, and shall be maintained in good condition. Directional signs are placed along the access road to the landfill and shall be maintained in good condition at all times. Edge-of-waste markers are installed and delineate the edge of waste. 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 Marshall FGD 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 offer 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 ► Operating and maintaining the leachate collection system (LCS) 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 ► Stormwater Maintenance and Inspection Logs Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 3 of 15 August 10, 2016 ► Erosion and Sedimentation Control Inspection Logs ► Periodic Landfill Inspection Reports ► Dust Control Monitoring Logs ► Groundwater Monitoring (and Sampling) Documentation ► Operations Plan The above records are to be kept in the operating record for the active life of the Marshall FGD 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 ► Record of the amount of solid waste received summarized on a monthly basis based on scale records ► Documentation of LCS system performance observations ► Documentation of erosion and sedimentation control observations ► Regulatory agency inspection reports ► Permit-to-Construct Application ► Employee training program and records ► Landfill drawings and specifications 1.9 Design Drawings Landfill design drawings are listed in the table below. The design drawings display the location of landfill features, landfill construction details, and technical design and construction notes. Table 1 – Design Drawings 2005 Approved Design Drawings M-6024-02.00 Cell 1 Excavation M-6024.03.00 Cell 1 Profile and Sections M-6024.04.00 Cell 1 Perimeter Road Realignment M-6024-08.00 Cell 1 and Cell 2 Perimeter Road Sections M-6024-09.00 Cell 1 and Cell 2 Perimeter Road Profile MM6451.00-0002.001* Gas Venting System Plan MM6451.01-0001.001 Cell 1 Erosion and Sediment Control Plan MM6451.01-0002.001 Cell 2 Erosion and Sediment Control Plan MM6451.01-0003.001 Final Closure Erosion and Sediment Control Plan MM6451.01-0004.001* Gypsum Landfill Erosion Control Details MM6451.00-0001.001* Final Closure Details MM6451.00-0003.001* Cell 1 Leachate Collection and Removal System MM6451.00-0004.001 Cell 1 Operational Cover Grading Plan MM6451.00-0005.001* Cell 1 Final Configuration MM6451.00-0006.001 Cell 1 Stormwater Basin MM6451.00-0007.001** Cell 1 and Cell 2 Details MM6451.00-0008.001 Cell 1 and Cell 2 Leachate Collection and Removal System MM6451.00-0009.001 Cell 2 Landfill Excavation MM6451.00-0010.001 Cell 2 Leachate Collection and Removal System MM6451.00-0011.001 Cell 2 Operational Cover Grading Plan MM6451.00-0012.001 Cell 2 Stormwater Basin Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 4 of 15 August 10, 2016 MM6451.00-0012.001 Cell 1 Cell 2 Final Configuration MM6451.00-0014.001 Cell 1 and Cell 2 Sections Notes: 1. Unless otherwise noted, the design drawing is from the Construction Plan Application dated December 15, 2005. 2. * indicates design drawing revised August 19, 2011 and April 6, 2012. 3. ** indicates sump closure detail revised November 1, 2013. 2005 Approved Phasing Drawings PD-1 – PD-7 Phasing Plan PD-8 Cell 1 Final Closure PD-9 Chimney Drain Details Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 5 of 15 August 10, 2016 2 Operations Management The primary objective of operations management at the Marshall FGD Landfill is to dispose of waste material in compliance with permit conditions while operating in a safe manner. 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 2 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 Marshall FGD Landfill Phase I, Cell 1 was permitted to operate on November 21, 2006. The Cell 1 footprint consists of approximately 17.9 acres. The capacity of the landfill is presented in Table 2 below. Table 2 – Lined Landfill Capacity Landfill Phase Gross Volume (CY) Previously Permitted Gross Volume for Phase 1 Cell 1 1,170,000 2.1.2 Waste Acceptance, Disposal, and Screening Requirements The Marshall FGD Landfill is permitted to accept CCR (including fly and bottom ash, pyrites, and coal mill rejects) generated at Duke Energy Corporation facilities. The Marshall Steam Station generated waste includes the following: ► Gypsum produced during the Flue Gas Desulfurization (FGD) process ► FGD clarifier sludge ► Waste limestone material, broiler slag, and sand blast material ► Ball mill rejects ► Asbestos ► Construction and demolition debris ► Land clearing and inert debris ► Waste water treatment sludge, and other waste streams produced by coal-fired electric or steam generation unit wastes ► Soil material that contains any of the above material and soil used for operations ► Incidental amounts of geotextile used in the management of CCPs 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, 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. Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 6 of 15 August 10, 2016 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 Marshall FGD 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 Marshall FGD Landfill. There are limited explosive gas concerns with aforementioned permitted waste types; 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: 828-478- 7521) shall be notified, and equipment and stockpiled soil shall be furnished to control accidental fires. Marshall 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 Marshall FGD Landfill is developed within the area shown on Figure 1. A 200-foot buffer will be maintained around the entire perimeter of the landfill. A 500-foot buffer will be maintained from existing residences and water supply wells. The majority of the areas within the buffer will remain in its current condition. 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 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. 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 Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 7 of 15 August 10, 2016 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 Asbestos Asbestos waste shall be packaged in accordance with 40 CFR 61, and it shall be disposed of away from the working face or in an area not contiguous with other disposal areas. Separate areas shall be clearly marked so that asbestos is not exposed by future land-disturbing activities. From lift to lift, if asbestos disposal areas are relocated, records of the areas must be maintained. Asbestos material shall not be placed within 25 feet of the exterior slopes. Asbestos material shall be placed in relatively thin lifts limited to only a few feet thick. Asbestos material shall be compacted as densely as practical and specific monitoring and in-place density testing for asbestos materials is not required. Asbestos material shall be covered as described in Section 2.1.8.1. 2.1.6.4 Construction and Demolition (C&D) Waste and Land Clearing and Inert Debris (LCID) The landfill may receive construction and demolition waste, land clearing waste, inert debris, untreated wood, and yard trash (leaves, sticks). These materials shall not be placed within 25 feet of the exterior slopes. Waste will be placed on the smallest active face as practical and compacted with a dozer as densely as practical. Specific monitoring and in-place density testing of C&D waste and LCID is not required. Compacted C&D waste and LCID will be covered as described in Section 2.1.8.2. 2.1.6.5 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 Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 8 of 15 August 10, 2016 may be modified as needed by the Owner or Operator to supply 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 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 produce 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 one test per 10,000 cubic yards. 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 pounds per cubic foot (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 50,000 cubic yards 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. Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 9 of 15 August 10, 2016 2.1.8 Cover Requirements 2.1.8.1 Operational Cover – Asbestos Material Asbestos waste material that has been deposited in the Marshall FGD Landfill will be covered within eight hours of placement with at least 6 inches of soil, ash, and/or gypsum material and compacted by a dozer. 2.1.8.2 Operational Cover – C&D Waste When the C&D waste disposal area exceeds one-half acre, and at least weekly, the compacted C&D waste will be covered with a minimum of 6 inches of earthen material (i.e., soil, ash and/or gypsum material). 2.1.8.3 Operational Cover For wastes other than asbestos waste and C&D waste, 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 achieve 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. 2.1.8.4 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. 2.1.8.5 Final Cover The final cover system for the Marshall FGD 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 ► Intermediate soil cover layer (may be thinner than the initial 12-inch thickness; geomembrane may be installed directly on waste) The soil components will yeild 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. Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 10 of 15 August 10, 2016 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 A leachate collection system (LCS) is in place to gravity drain the leachate from the landfill. A 12-inch thick layer of operational cover is over the geomembrane liner and leachate collection and removal system. Leachate and stormwater are conveyed by pipe to the Marshall Ash Basin, which discharges in accordance with the MSS plant’s National Pollutant Discharge Elimination System (NPDES) permit. 2.3 Leachate Collection System (LCS) The leachate collection system consists of a geonet/geotextile with a perforated collection/header piping system that drains by gravity into a pipe at the previous location of the stormwater storage basin riser. The leachate is then directed by gravity flow to the Marshall Ash Basin. Two chimney drains with a header pipe are designed through the center of the landfill and are connected to the sump. The landfill grading will be sloped toward each chimney drain to facilitate drainage of contact storm water through the landfill. As each lift of waste is filled, a section of chimney drain will be added until final landfill grades are achieved. The chimney drain will have an inverted filter with No. 57 stone, No. 78M stone, and C-33 sand or bottom ash. The inverted filter will reduce the clogging potential of the chimney drain. The chimney drain design and details are presented in the Phasing Diagrams. 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 concurrent with the groundwater water sampling. A grab sample will be obtained from the outlet of each leachate pipe. 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 Marshall Ash Basin, leachate will be temporarily stored within the landfill until such time that draining operations to the active ash basin 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 Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 11 of 15 August 10, 2016 2.4 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 25-year, 24-hour storm event, and generally consists of the following components: ► Diversion Berms ► Subsurface drains ► Slope drains ► Perimeter ditches Intermediate cover will be placed over waste at the exterior side slopes. Diversion berms will be placed to convey non-contact surface water from the exterior side slopes to slope drains. The diversion berms and slope drains will be constructed and extended as operations progress. The slope drains discharge to perimeter ditches, which in turn ultimately discharge to the Marshall Ash Basin via a system of culverts and channels. Stormwater collection and conveyance measures will be checked regularly and maintained such that necessary repairs can be made as early as practical. 2.4.1 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. A jurisdictional wetland and stream are located to the west of the landfill. Maintenance of the stormwater system shall be performed to ensure these areas are not impacted by stormwater or sediment. 2.5 Landfill Gas Management Because the nature of the waste to be placed in the Marshall FGD 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 E&SC measures included on Drawing No. MM6451.00-0005.001 (Cell 1 Final Configuration) and Drawing No. MM6451.01-0004.001 (Gypsum Landfill Erosion Control Details), both dated August 19, 2011. 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 Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 12 of 15 August 10, 2016 ► 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, furnished 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. 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 ► 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. Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 13 of 15 August 10, 2016 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 German Millet 50 FALL, WINTER, (September – December) SPRING (January - April) 4.2 Permanent Seeding Permanent Seeding will be applied as follows or as required by the site’s vegetation management plan: Warm Season Planting (May – Aug) Nurse Crop Seed Pounds Per Acre German Millet 50 SPRING (January - April) Soil Amendments Application Rate Agricultural limestone Per soil test or 1 ton/ac Fertilizer (10-10-10) Per soil test or 1000 lbs/ac Mulch 2 tons/ac Seeds Pounds Per Acre Rye (grain) 125 Seeds Pounds Per Acre Annual Rye 50 Rye (Grain) 125 Seeds Pounds Per Acre Kentucky 31 Tall Fescue 150 Rye (Grain) 50 Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 14 of 15 August 10, 2016 Note: Perform soil test to determine proper soil amendments; if not available, use the quantities above, and are applicable year round 4.3 Over-Seeding Over-seeding will be applied as follows: SUMMER (May – August) Seeds Pounds Per Acre German Millet 25 FALL, WINTER, (September – December) SPRING (January - April) 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 Marshall FGD 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. Seeds Pounds Per Acre Kentucky 31 Tall Fescue 50 Rye (Grain) 25 Seeds Pounds Per Acre Kentucky 31 Tall Fescue 50 Rye (Grain) 25 Landfill Operations Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 15 of 15 August 10, 2016 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 120 days of sampling event. Semiannually 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 FIGURES EXISTING MAJOR CONTOUR (10')EXISTING MINOR CONTOUR (2')700 LEGEND N 102030TENTHSINCHES123 D W G S I Z E R E V I S I O N F O R D R A W I N G N O . T I T L E F I L E N A M E : D W G T Y P E : J O B N O : D A T E : S C A L E : D E S : D F T R : C H K D : E N G R : A P P D : AFEDCB 234 5 7 8 6 4 5 7 8 9 1 0 6 A F C B 2 2 " x 3 4 " A N S I D 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 S E A L R E V D A T E J O B N O . P R O J E C T T Y P E D E S D F T R C H K D E N G R A P P D D E S C R I P T I O N N O T F O R C O N S T R U C T I O N N C G E O L O G Y : C - 2 4 7 N C E N G : F - 1 2 5 3 L I C E N S U R E : F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 T E L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 C H A R L O T T E , N C 2 8 2 0 8 S U I T E 1 0 0 2 8 0 1 Y O R K M O N T R O A D 0 4 / 2 0 / 2 0 1 6 7 8 1 0 1 6 0 6 5 4 D W G A S S H O W N M A S M A S M A S R F K R F K F G D . d w g 1 1 0 0 1 F I G U R E 1 I S S U E D F O R P E R M I T A M E N D M E N T M A R S H A L L S T E A M S T A T I O N T E R R E L L , C A T A W B A C O U N T Y , N O R T H C A R O L I N A F G D R E S I D U E L A N D F I L L E X I S T I N G C O N D I T I O N S L A N D F I L L O P E R A T I O N S P L A N 0 5 / 1 9 / 2 0 1 6 7 8 1 0 1 6 0 6 5 4 R F K R F K M A S M A S M A S F O R P E R M I T A M E N D M E N T 1 8 / 1 0 / 2 0 1 6 7 8 1 0 1 6 0 6 5 4 R F K 5 ) . M A S M A S M A S U P D A T E D W I T H 2 0 1 6 T O P O G R A P H I C S U R V E Y 1 0 0 1 E X I S T I N G C O N T O U R S O U T S I D E O F A P P R O X I M A T E B O U N D A R Y S E E R E F . 1 EXISTING C O N T O U R S B E T W E E N APPROXIMATE B O U N D A R Y S E E R E F . 2 REFERENCES:1.EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIALPHOTOGRAPHY OBTAINED ON APRIL 4, 2014 BY WSP GROUP.2.EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIALPHOTOGRAPHY OBTAINED ON MAY 7, 2016 BY WSP GROUP, HATCHED AREAS ARE OBSCURED AS REPORTED BYSURVEYOR. APPENDIX I Dust Control Plan Prepared For: Duke Energy Carolinas, LLC 526 S. Church St. Charlotte, NC 28202 Date August 10, 2016 Prepared By: Amec Foster Wheeler 2801 Yorkmont Rd., Charlotte, NC 28208 Dust Control Plan Marshall Flue Gas Desulfurization Residue Landfill (Permit No. 1809-INDUS) Duke Energy Carolinas– Marshall Steam Station Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Dust Control Plan Duke Energy – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 TOC August 10, 2016 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 .......................................................................................................... 3 List of Figures Figure 1 Landfill Operations Grid List of Attachments Attachment I Dust Monitoring Form Dust Control Plan Duke Energy – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 1 of 3 August 10, 2016 1 Introduction and Site Description This Dust Control Plan is for the Marshall FGD Landfill at Duke Energy’s Marshall Steam Station. This Plan outlines dust control methods for managing dust emissions at the landfill. The Plan also establishes 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 Marshall FGD Landfill is principally used for CCR management. CCR managed by the landfill primarily consist of FGD residue (i.e., gypsum, clarifier sludge), fly ash, bottom ash, and mill rejects. The landfill is also used for asbestos and construction and demolition debris (C&D) waste management. 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. Dust Control Plan Duke Energy – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 2 of 3 August 10, 2016 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 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 result in 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 furnished 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 deliver 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. Dust Control Plan Duke Energy – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 3 of 3 August 10, 2016 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, 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 EXISTING MAJOR CONTOUR (10')EXISTING MINOR CONTOUR (2')LEGEND N 102030TENTHSINCHES123 D W G S I Z E R E V I S I O N F O R D R A W I N G N O . T I T L E F I L E N A M E : D W G T Y P E : J O B N O : D A T E : S C A L E : D E S : D F T R : C H K D : E N G R : A P P D : AFEDCB 234 5 7 8 6 4 5 7 8 9 1 0 6 A F C B 2 2 " x 3 4 " A N S I D 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 S E A L R E V D A T E J O B N O . P R O J E C T T Y P E D E S D F T R C H K D E N G R A P P D D E S C R I P T I O N N O T F O R C O N S T R U C T I O N N C G E O L O G Y : C - 2 4 7 N C E N G : F - 1 2 5 3 L I C E N S U R E : F A X : ( 7 0 4 ) 3 5 7 - 8 6 3 8 T E L : ( 7 0 4 ) 3 5 7 - 8 6 0 0 C H A R L O T T E , N C 2 8 2 0 8 S U I T E 1 0 0 2 8 0 1 Y O R K M O N T R O A D 0 4 / 2 0 / 2 0 1 6 7 8 1 0 1 6 0 6 5 4 D W G A S S H O W N M A S M A S M A S R F K R F K D u s t C o n t r o l G r i d . d w g 1 1 0 0 1 F I G U R E 1 I S S U E D F O R P E R M I T A M E N D M E N T M A R S H A L L S T E A M S T A T I O N T E R R E L L , C A T A W B A C O U N T Y , N O R T H C A R O L I N A F G D R E S I D U E L A N D F I L L L A N D F I L L O P E R A T I O N S G R I D D U S T C O N T R O L P L A N 0 5 / 1 9 / 2 0 1 6 7 8 1 0 1 6 0 6 5 4 R F K R F K M A S M A S M A S F O R P E R M I T A M E N D M E N T 1 8 / 1 0 / 2 0 1 6 7 8 1 0 1 6 0 6 5 4 R F K 5 ) . M A S M A S M A S U P D A T E D W I T H 2 0 1 6 T O P O G R A P H I C S U R V E Y 1 0 0 1 REFERENCES:1.EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIALPHOTOGRAPHY OBTAINED ON APRIL 4, 2014 BY WSP GROUP.2.EXISTING TOPOGRAPHIC INFORMATION WAS PRODUCED FROM PHOTOGRAMMETRIC METHODS FROM AERIALPHOTOGRAPHY OBTAINED ON MAY 7, 2016 BY WSP GROUP, HATCHED AREAS ARE OBSCURED AS REPORTED BYSURVEYOR.ABCDEF 12 3 4 5 6 7 8 E X I S T I N G C O N T O U R S B E T W E E N A P P R O X I M A T E B O U N D A R Y S E E R E F . 2 EXISTING CONTOURS OUTSIDE OFAPPROXIMATE BOUNDARY SEE REF. 1 ATTACHMENT I Dust Monitoring Form FG D Re s i d u e La n d f i l l Pe r m i t No . 18 0 9 ‐IN D U S Du s t Co n t r o l Mo n i t o r i n g Fo r m Marshall Steam Station Terrell, 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 (Included are PD-8 and PD-9, others by reference only) APPENDIX III Closure/Post-Closure Plan Prepared For: Duke Energy Carolinas, LLC 526 S. Church St. Charlotte, NC 28202 Date May 19, 2016 Prepared By: Amec Foster Wheeler 2801 Yorkmont Rd., Suite 100, Charlotte, NC 28208 Closure and Post-Closure Plan Marshall Flue Gas Desulfurization Residue Landfill (Permit No. 1809-INDUS) Duke Energy Carolinas– Marshall Steam Station Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Closure & Post-Closure Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 TOC May 19, 2016 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 ........................................................................................................... 4 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 Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 1 of 4 May 19, 2016 1 Introduction This Closure and Post-Closure (Closure/Post-Closure) Plan is being submitted as part of the Landfill Operations Plan and was prepared for the Marshall FGD 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 Carolinas (Duke) in the closure of the landfill and the maintenance and monitoring required during the post-closure care period. 1.1 Project Information The Marshall FGD Landfill consists of Phase1, Cell 1 approximately 17.9 acres of lined area. The general location of the Marshall FGD 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 Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 2 of 4 May 19, 2016 2.2 Gas Management System The majority of waste disposed in the Marshall FGD 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 Marshall FGD 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 diversion berms and conveyed to a series of slope drains which will discharge to the perimeter channel system. Plans and details illustrating the stormwater management system are illustrated in the Engineering Plan drawings. 2.4 Largest Area Requiring Cover System The proposed Marshall FGD Landfill will be operated until closure. The largest area requiring cover system construction is the entire footprint of the proposed landfill which is approximately 17.9 acres in plan area. 2.5 Estimated Maximum Waste Inventory The proposed landfill design yields approximately 1,170,000 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 Environmental Quality (NCDEQ) 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 Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 3 of 4 May 19, 2016 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 17.9 acres in plan area, which is the entire footprint of the proposed Marshall FGD 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 Water Quality Monitoring Plan dated May 2016. Closure & Post-Closure Plan Duke Energy Carolinas, LLC – Marshall Steam Station Marshall FGD Landfill Terrell, Catawba County, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 4 of 4 May 19, 2016 3.3 Facility Contact Information Duke will be responsible for post-closure inspections, maintenance and monitoring. Correspondence regarding the Marshall FGD Landfill should be directed to: Duke Energy Carolinas, LLC Marshall Steam Station 8320 East NC Hwy 150 Terrell, North Carolina 28682 (828) 478-7622 System Owner for Landfill Operations The physical address of the Marshall FGD Landfill is the same as above. 3.4 Anticipated Post-Closure Use The Marshall FGD 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 Marshall FGD Landfill. Duke Energy will obtain approval from NCDEQ 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 Carolinas 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. FIGURES ) Copyright:© 2013 National Geographic Society, i-cubed 1PROJECT NO:FIGURE NO:7810-16-0654 ¯ 0 2,0001,000 Feet NOTE: THIS FIGURE IS FOR REFERENCE ONLY. LEGEND )MARSHALL STEAM STATION CELL 1 APPROXIMATE BOUNDARY MARSHALL STEAM STATIONCATAWBA COUNTY, NORTH CAROLINA SITE MAPCLOSURE AND POST-CLOSURE PLANFGD RESIDUE LANDFILL F:\AMEC_Projects\2016\7810-16-0654 Marshall\GIS\MXDs\SiteMap.mxd, User: maddison.sutton; Date: 5/3/2016 4:18:07 PM, Checked by: RK Date: 5/03/2016 ÊÊ PROJECT LOCATION APPENDIX I Post-Closure Inspection Form Date/Time: Observation Personnel: Weather/Temperature: Question No Yes If yes, location Description Corrective Actions Recommended Date Corrected Is there evidence of erosion, settlement, rutting, or potholes? Is there evidence of cover system intrusion (ruts, burrows, excavation)? Is there evidence of stressed vegetation or bare spots, or evidence of woody vegetation (small trees and/or shrubs)? Is there evidence of erosion or sedimentation in storm water channels, down drain pipes, or other stormwater features? Is there evidence of penetrations (poles, posts, stakes)? Is there evidence of human encroachment (trash, fire pits, tire/footprints)? General Notes: Duke Energy Carolinas ‐ Marshall FGD Residue Landfill Post‐Closure Inspection Form 1 / 1 APPENDIX II Cost Estimate for Closure and Post-Closure Activities Quantity Unit Cost1 Total Final Cover System Demolition of Interim Cover Measures 17.9 AC 1,000.00$ 17,900$ Fine Grading of Interim Cover 17.9 AC 3,800.00$ 68,020$ Vegetative Layer (6" thick) 14,500 CY 11.00$ 159,500$ Protective Cover (18" thick) 43,300 CY 5.50$ 238,150$ Drainage Geocomposite 780,000 SF 0.98$ 764,400$ 40‐mil Text. LLDPE Geomembrane 780,000 SF 0.63$ 491,400$ Stormwater Management Erosion Control Bench w/ Toe Drain 6,400 LF 65.00$ 416,000$ 30" Nyoplast Inline Drain 9 EA 1,000.00$ 9,000$ Slope Drains (18" CPP) 1,030 LF 35.00$ 36,050$ Subsurface Drains 1,600 LF 50.00$ 80,000$ RCP Headwall 1 EA 2,745.00$ 2,745$ Surveying 17.9 AC 1,400.00$ 25,060.00$ Permanent Vegetative Stabilization 17.9 AC 1,800.00$ 32,220.00$ Subtotal 2,340,445$ Mobilization (5% of Subtotal)117,022$ Engineering and CQA (12% of Subtotal)280,853$ Contingency (15% of Subtotal)351,067$ TOTAL 3,089,387$ COST PER ACRE 172,591$ Notes: 1. Costs are based on 2016 dollars. May 2016 Table 1 Closure Cost Estimate Marshall FGD Landfill Permit No. 1809‐INDUS Terrell, North Carolina Quantity Unit Unit Cost1 Annual Cost Compliance Monitoring Reporting2 Reporting and Administration 1 LS 9,600$ 9,600$ Compliance Monitoring Sampling and Analytical (semi‐annual)2 Groundwater3 9 Well 1,500$ 13,500$ Leachate4 1 Location 500$ 500$ Maintenance (annual) Fencing, Gates, Signs, etc. 1 LS 1,000$ 1,000$ Access Roads 1 LS 5,000$ 5,000$ Mowing 17.9 AC 100$ 1,790$ Stormwater Structures 1 LS 5,000$ 5,000$ Leachate Collection Pipe Cleaning and Camera Inspection5 Every 5th Year Event 5,000$ 1,000$ Groundwater Monitoring Wells 1 LS 4,500$ 4,500$ Final Cover System6 17.9 AC 1,500$ 26,850$ Annual Permit Fee 1 EA 500$ 500$ Subtotal 69,240$ Mobilization (5% of Subtotal)3,462$ Engineering and CQA (12% of Subtotal)8,309$ Contingency (15% of Subtotal)10,386$ ANNUAL TOTAL 91,397$ 30‐YEAR TOTAL 2,741,904$ Notes: 1. Costs are based on 2016 dollars. 2. The sampling, analytical and reporting costs are based on actual 2016 costs. 3. The monitored wells are MS‐8, 9, 10, 11, 12, 13, 14, 15, and 16. 4. Leachate discharge point is 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. May 2016 Table 2 Post‐Closure Cost Estimate Marshall FGD Landfill Permit No. 1809‐INDUS Terrell, 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 9 Well 1,500$ 13,500$ Subtotal 32,500$ Contingency (15% of Subtotal)4,875$ ANNUAL TOTAL 37,375$ 30‐YEAR TOTAL 1,121,250$ REQUIRED MINIMUM 2,000,000$ Notes: 1. Costs are based on 2016 dollars. 2. The assessment reporting cost is assumed to be twice the cost for routine reporting. 3. The monitored wells are MS‐8, 9, 10, 11, 12, 13, 14, 15, and 16. 4. The assessment sampling and analytical costs are estimated to be twice the routine cost per well. May 2016 Table 3 Potential Assessment and Corrective Action Costs Marshall FGD Landfill Permit No. 1809‐INDUS Terrell, North Carolina To: Duke Energy Carolinas, LLC Date 7/28/2016 From: Amec Foster Wheeler Water Quality Monitoring Plan Revised July 28, 2016 Marshall Flue Gas Desulfurization Residue Landfill, Phase 1, Cell 1, Permit No. 18-09 Duke Energy – Marshall Steam Station Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 TOC Table of Contents EXECUTIVE SUMMARY...............................................................................................................................................1 1 PROGRAM DESCRIPTION ...................................................................................................................................3 1.1 Scope of Work ...............................................................................................................................................3 1.2 Background and Site Hydrogeological Description .......................................................................................3 1.3 Well Locations and Installation ......................................................................................................................4 1.4 Surface Water Sample Location....................................................................................................................5 1.5 Monitoring Frequency....................................................................................................................................6 1.6 Parameters ....................................................................................................................................................6 1.7 Data Quality Objectives .................................................................................................................................6 2 SAMPLING PROCEDURES...................................................................................................................................6 2.1 Sampling Equipment......................................................................................................................................6 2.1.1 Equipment Cleaning Procedures...............................................................................................................6 2.2 Groundwater Sampling..................................................................................................................................7 2.2.1 Development of Wells................................................................................................................................7 2.2.2 Groundwater Level and Total Depth Measurements.................................................................................7 2.2.3 Well Purging and Sampling........................................................................................................................7 2.2.4 Sample Collection......................................................................................................................................9 2.2.5 Sample Containers, Volume, Preservative, and Holding Time..................................................................9 2.3 Surface Water Sampling..............................................................................................................................10 2.4 Sample Tracking..........................................................................................................................................10 2.5 Sample Labeling ..........................................................................................................................................10 2.6 Field Documentation....................................................................................................................................10 2.7 Chain-of-Custody Record ............................................................................................................................11 2.8 Sample Custody, Shipment, and Laboratory Receipt..................................................................................12 3 ANALYTICAL PROCEDURES.............................................................................................................................12 4 INTERNAL QUALITY CONTROL CHECKS.........................................................................................................12 5 VALIDATION OF FIELD DATA PACKAGE..........................................................................................................13 6 VALIDATION OF LABORATORY DATA..............................................................................................................14 7 REPORT SUBMITTAL .........................................................................................................................................14 Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 TOC Tables Table 1 Monitoring Well Information Table 1.1 Surface Water Sample Location Table 2 Sample Parameters and Analytical Methods Table 3 Sample Containers, Preservatives, and Holding Times Figures Figure 1 Site Location Map Figure 2 Sample Locations Figure 3 Typical Monitoring Well Construction Details Figure 4 Groundwater Monitoring Data Sheet Figure 5 Field Sampling Calibration Form Figure 6 Chain-of-Custody Form Figure 7 Groundwater Sampling Site Checklist Appendix Appendix A Monitoring Well Construction Records Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 1 of 14 Executive Summary The following Water Quality Monitoring Plan (WQMP) – Revised July 28, 2016, represents the second 5-year update to the WQMP for the Duke Energy (Duke) Flue Gas Desulfurization (FGD) Residue Landfill at Marshall Steam Station. The original WQMP was approved in November 2006. The current WQMP (the first 5-year update) was prepared by Altamont Environmental, Inc. (Altamont) and titled Groundwater Sampling and Analysis Plan, dated August 19, 2011. The current Permit to Operate is scheduled to expire on November 21, 2016. As part of the permit amendment (renewal), Amec Foster Wheeler was requested to review and update the current WQMP as needed per the requirements stated in 15A NCAC 13B .0504 (1)(g)(iv). The water quality monitoring network remains unchanged for the Marshall FGD Landfill facility since the last update; therefore, the overall content of the current WQMP remains relevant and applicable. In general, Amec Foster Wheeler retained Altamont’s 2011 plan content and organization for this WQMP update with the exception of the following revisions: Minor text edits, primarily changing absolute terms to qualifier terms Updated Department of Environment and Natural Resources (DENR) references to Department of Environmental Quality (DEQ) Table 1 total depths for MS-8 and MS-16 were revised to reflect the bottom of the well and not the bottom of the borehole. Table 2 detection limits column was removed since it is lab-specific. Detection limits are generally specified by the analytical methods which are still listed. Table 2 dissolved oxygen (DO) and oxidation reduction potential (ORP) rows were added under in situ parameters. Table 2 analytical method for in situ parameters was changed to “Multi-Parameter Water Quality Meter” and “Turbidimeter” as appropriate instead of listing a specific brand of equipment. Table 2 units were changed for chloride, fluoride, nitrate, sulfate, and total dissolved solids from micrograms per liter to milligrams per liter, which is the more common laboratory reporting format for those parameters. Table 2 and 3 parameters Antimony, Beryllium, Thallium, and Vanadium were added as requested in a Permit to Operate Renewal Application letter from the North Carolina Department of Environmental Quality (DEQ), Division of Waste Management (DWM), Solid Waste Section (SWS) dated June 17, 2016. Table 2 and 3 parameter Cobalt was added as requested in an email to Mr. Mark Shumpert of Amec Foster Wheeler from Ms. Tyler Hardin of Duke Energy dated July 19, 2016. Table 3 ORP row added under in situ parameters. Table 3 holding times corrected from 6 months to 28 days for mercury and fluoride. Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 2 of 14 Replaced Duke Energy Field Sampling Forms, as provided by Duke (Figures 4 through 7) Revised report submittal timeframe from within 90 days post-sampling to within 120 days post-sampling to be consistent with requirement stated in the facility’s Permit to Operate. Amec Foster Wheeler included Figures 1 through 3 and Appendix A as unrevised from Altamont’s 2011 WQMP. Courtney W. Murphy, P.G. Amec Foster Wheeler NC Geology Firm License C-247 Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 3 of 14 1 Program Description 1.1 Scope of Work This Water Quality Monitoring Plan (WQMP) is designed to guide the monitoring efforts that are used to evaluate the effects of the Marshall Steam Station (Marshall) Flue Gas Desulfurization (FGD) Residue Landfill, Phase 1, Cell 1, on the groundwater in the area. This plan has been prepared according to the guidelines set forth by the North Carolina Department of Environmental Quality (DEQ) Water Quality Guidance Document for Solid Waste Facilities (SW- 1001-87), and by the Environmental Protection Agency (EPA) in "Interim Guidelines and Specifications for Preparing Quality Assurance Plans" (QAMS-500/80), and documents the methodologies of field sampling, record-keeping protocols, data quality objectives, and data validation procedures that will be used in this program. 1.2 Background and Site Hydrogeological Description Marshall Steam Station (Marshall) is located in Catawba County, on Highway NC 150, just west of Lake Norman. The station is owned and operated by Duke Energy Carolinas, LLC (Duke). Marshall is located in the Piedmont physiographic region. Figure 1 shows the location of the plant and the location of the FGD landfill, Phase 1, Cell 1. The Marshall Steam Station has a generating capacity of 2,090 megawatts (MW) of electric power by the combustion of coal. Therefore, the Marshall station generates enough electricity to power over one-and-a- half million homes. The FGD Residue Landfill will consist of two cells. When completed, the landfill footprint will contain approximately 31.9 acres. Construction of Cell 1 was completed in 2006, and a Permit to Operate was issued on November 21, 2006. Duke has not requested a Permit to Construct for Cell 2. Cell 1 has a footprint of approximately 14.8 acres. In general the landfill is permitted to receive industrial wastes generated by Duke at Marshall and at other Duke facilities. The waste received at the FGD residue landfill consists primarily of gypsum. The FGD residue is conveyed to the landfill site by truck, where the material is spread and compacted. The landfill was constructed with a leachate collection and removal system and an engineered liner system to prevent impacts to groundwater. When closed, the completed landfill will receive an engineered cover system to reduce infiltration. The FGD landfill is located entirely on Duke property, northwest of the Marshall Station and to the west of the Marshall Ash Basin. The landfill is located to the east of a north-south trending railroad line. . Located to the west of this railroad line is Sherrill’s Ford Road, which also runs north-south along a surface water divide. Located between the landfill footprint and the railroad line is a surface water drainage feature. This feature drains to the south, to an intermittent stream that drains to Lake Norman. There is a topographic divide running north-northwest through the landfill footprint, along Steam Plant Road. Surface drainage to the west of Steam Plant Road drains to the surface drainage feature and surface drainage to the east of Steam Plant Road drains to the Marshall Ash Basin. Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 4 of 14 As described in the site hydrogeological study (Hydrogeological Study FGD Scrubber Landfill, Duke Power-- Marshall Steam Station, Terrell, North Carolina, S&ME Project No: 1264-02-578, May 30, 2003), the subsurface conditions in the landfill area consist of residual soils and partially to fully weathered rock (saprolite) , which have formed by the in- place weathering of the parent rock. As is typical in the groundwater systems located in the Piedmont region, groundwater at the landfill site occurs within the residuum and saprolite under unconfined aquifer conditions. The predominant discharge areas for groundwater in the landfill area are expected to be the drainage feature and the ash basins located to the east of the landfill. The subsurface conditions at the landfill were described by S&ME as follows: Residuum: Beneath the ground surface, residual material consisting of silts, silty clays, clayey silts, and silty sands. Sandy silts were found at depths ranging from 2.5 to 14 feet below ground surface. Saprolite: Saprolite material was found at depths ranging from 13.5 feet to 68.5 feet below ground surface. This material is a product of weathered bedrock, consisting of silts to clayey silts and sandy silts to silty sands, having a Standard Penetration Test (SPT) resistance of 50 blows per foot or more. Partially Weathered Rock: This material is defined as material exhibiting SPT resistances in excess of 100 blows per foot. This material was found at depths ranging from 25.5 feet to 90 feet below ground surface. Bedrock: Bedrock was found at depths ranging from 25.5 feet to 79.5 feet. When sampled, this material was classified as granite, schist, and gneiss. Horizontal to high- angle fractures were found in the upper ten feet of the bedrock areas. Many fractures were found to be iron stained, indicating flow of water into the fractures. 1.3 Well Locations and Installation Groundwaterandsurfacewater conditionsat the landfill aremonitoredusingninegroundwater monitoring wells and one surface water sampling location. Monitoring well locations and construction information are provided in Table 1. The locations of these wells are shown on Figure 2. Monitoring well MS-8 will be used as the backgroundwell for this sampling program. The wells were constructed of two-inch diameter polyvinyl chloride (PVC) well screen and casing. The well screens were placed where they would intercept the aquifer and have slot sizes of 0.010 inch. The screen lengths are shown in Table 1. The wells were installed by a well driller registered in North Carolina in accordance with applicable DEQ regulations. The locations of the wells and the elevations of the tops of the casings were surveyed under the direction of a Professional Surveyor, licensed in North Carolina. Figure 3 shows a typical construction diagram for the wells. Each well is equipped with dedicated bladder- type pump systems. Well construction records for the existing wells are included in Appendix A. A brief description of the monitoring locations and their monitoring function is provided below. Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 5 of 14 Monitoring Well MS-8—BackgroundWell Monitoring well MS-8 will be used as a background monitoring well. This well is located approximately 250 feet north of the landfill, on the west side of Steam Plant Road. This well is screened to monitor groundwater in the saprolite layer. Monitoring Well MS-9 This existing well is located north of the landfill. This well is screened to monitor groundwater in the saprolite layer. Monitoring Well MS-10 This well is located west of the landfill. This well is screened to monitor groundwater in the saprolite layer. Monitoring Well MS-11 This well is located west of the landfill. This well is screened to monitor groundwater in the saprolite layer. Monitoring Well MS-12 (Formerly Designated as Well OW-3) This well is located south of the landfill. This well is screened to monitor groundwater in the saprolite layer. Monitoring Well MS-13 (Formerly Designated as Well MS-6) This well is located south of the landfill. The well is screened to monitor groundwater in the saprolite layer. Monitoring Well MS-14 (Formerly Designated as Well B-5) This well is located to the southeast of the landfill. This well is screened to monitor groundwater in the saprolite layer. Monitoring Well MS-15 (Formerly Designated as Well B-4) This well is located to the east of the landfill. This well is screened to monitor groundwater in the saprolite layer. Monitoring Well MS-16 This well is located to the northeast of the landfill. This well is screened to monitor groundwater in the saprolite layer. 1.4 Surface Water Sample Location A surface water sample will be collected from location SW-1. This surface water sampling location is located south of the landfill, between wells MS-12 and MS-13, as shown on Figure 2. The North Carolina State Plane coordinates and elevation for this sampling location are shown in Table 1.1. Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 6 of 14 1.5 Monitoring Frequency The wells and surface water sample location will be sampled semiannually in March and September. 1.6 Parameters The parameters to be sampled and analyzed, units of measure, and analytical methods are presented in Table 2. 1.7 Data Quality Objectives The overall Quality Assurance (QA) objective is to provide reliable data of known and acceptable quality. Measurements will be documented to yield results that are representative of the groundwater and surface water quality. Data will be calculated and reported in units as required by DEQ. The analytical QA objectives for precision, accuracy, and completeness have been established by the laboratories in accordance with EPA or other accepted agencies for each measurement variable, where possible. The objectives are outlined in the Duke Energy Analytical Laboratory Procedures Manual and are available upon request. Detection limits for the water analyses are generally specified by the analytical method. As stated above, appropriate methods have been selected to meet applicable standards for groundwater quality. Instances may occur, however, in which the condition of the sample may not allow detection of the desired limits for various parameters either because of matrix interference or elevated analyte concentrations requiring sample dilution. The laboratory(s) will provide sufficient documentation with each data package to notify reviewers about any analytical issues with the data, if needed. 2 Sampling Procedures 2.1 Sampling Equipment Development, purging, and sampling equipment are selected so that materials are compatible with the sample parameters and comply with state and federal regulatory requirements for sampling. Positive-gas- displacement fluorocarbon resin bladder pumps are installed in each monitoring well and are dedicated purging and sampling systems. 2.1.1 Equipment Cleaning Procedures Dedicated sampling equipment has been installed in each monitoring well. In the event non- dedicated equipment is used between wells, equipment will be cleaned before and after use in each well in accordance with standard EPA-approved cleaning procedures for field equipment. This standard is outlined in the Standard Operating Procedures and Quality Assurance Manual, Engineering Support Branch, EPA Region IV, February 1, 1991. Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 7 of 14 2.2 Groundwater Sampling 2.2.1 Development of Wells Each of the nine wells addressed in this WQMP have been developed. If new wells are installed they will be developed before they are sampled. After installation of new wells, and prior to initial sampling, the monitoring wells will be developed. Development reduces silt that has settled into the bottom of the well following installation, and reduces fine silt and clay particles from the well screen and sandpack surrounding the screen. Well development is performed to reduce potential for clogging and promote well performance. Development involves removing an estimated ten or more well volumes from the well using a positive-gas-displacementfluorocarbon resin bladder pump with up-and-down agitation to loosen particles from the well screen. After development of a well, a true well depth is recorded, referenced to the top of well casing (TOC). 2.2.2 Groundwater Level and Total Depth Measurements Water level measurements are collected and recorded to determine the groundwater elevations, determine groundwater flow direction, and to calculate the volume of standing water in the well. Each monitoring well has been surveyed to determine the elevation of the TOC. Total well depth and water level measurements are referenced to the TOC and recorded to the nearest one-hundredth of a foot. Water level measurements are collected with an electronic measuring device consisting of a spool of dual conductor wire and sensor. When the sensor comes in contact with water, the circuit is closed and a meter light and/or buzzer is attached to the spool to signal the contact. The sensor is lowered further until it rests on the bottom of the well to determine the total depth of the well reference to the TOC. The depth and water level measurements are used to verify that the well has not filled with silt and to calculate the volume of water in the well. The volume of well water (in gallons) is calculated using the following equation: V=h*πr2 * (7.48052 gal/ft 3) where V = volume of water in the well screen and casing (gallons) h = height of standing water (feet) = total well depth – water level r = radius of well casing (feet) In dedicated sampling systems, an accurate well depth is determined, as indicated above, after development of the well and prior to installation of the dedicated bladder pump. The well depth, water level measurement,and calculated well volume are recorded on the Groundwater Monitoring Data Sheet (Figure 4). 2.2.3 Well Purging and Sampling The selection of purging technique is dependent on the hydrogeologic properties of the aquifer and hydraulic characteristics of each well. Hydraulic conductivity, water column, well volume, screen length, and other information are evaluated to select the purging technique to acquire Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 8 of 14 groundwater representative of the aquifer conditions. The Groundwater Monitoring Data Sheet (Figure 4) is used to record purging methods and measurements. A multi-parameter water quality monitoring instrument is used to measure field stabilization or indicator parameters for determining representative groundwater during purging. These instruments measure pH, specific conductance, temperature, dissolved oxygen (DO), and oxidation-reduction potential (ORP). Instrument calibration must be performed and documented before and after each sampling event. The pH subsystem will be calibrated with two pH standards (pH 7.0 and 4.0) bracketing the expected groundwater pH. The specific conductance subsystem will be calibrated using two standards bracketing the expected groundwater conductivity. Calibration results will be recorded on a Field Sampling Calibration Form (Figure 5). Various well purging techniques are described below. Currently, each well is fitted with dedicated pumps. The purging method utilized at any particular well will be selected after considering the characteristics of the well and the purging method(s) used during previous sampling events. Conventional Purging This technique entails removing one equivalent well volume and measuring the indicator parameters (temperature, pH, and specific conductance). When the parameters have stabilized to within ±0.2 pH units and ±10% for temperature and conductivity over three to five well volumes, representative groundwater has been achieved for sampling. It is acceptable to begin sampling after five complete well volumes have been removed, even when indicator parameters have not stabilized. Groundwater is pumped into a graduated container to measure the volume of water purged. Under normal rates of recovery, samples should be collected immediately after purging, in accordance with EPA guidelines. For low-yield wells, incapable of yielding three to five well volumes in a reasonable amount of time (e.g., 2 hours or less), groundwater is purged to the elevation of the pump intake while measuring indicator parameters. Typically, low-yield wells are evacuated to dryness one time and sampled when sufficient water level recovery occurs. Low-Flow Purging Low-flow purging and sampling are appropriate when the recharge rate of the well approximates or equals the discharge rate of the pump with minimal drawdown of the water column (≤1 foot). During low-flow purging and sampling, groundwater is pumped into a flow-through chamber at flow rates that stabilize water level drawdown within the well. Indicator parameters are measured over time (usually at five-minute intervals). When parameters have stabilized within ±0.2 pH units and ±10% for temperature, conductivity, and DO, and ±10 milli-Volts (mV) for ORP over three consecutive readings, representative groundwater has been achieved for sampling. Turbidity is not included as a stabilization parameter, but turbidity levels of 10 nephelometric turbidity units (NTU) or less should be targeted. Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 9 of 14 Modified Low-Flow Purging This technique is considered a viable option particularly in the Piedmont region due to clay soils where water level drawdown cannot be stabilized while pumping. When the well recharge rate is less than the pump discharge rate, excessive drawdown (> 1 foot) of the water column occurs and mixes with stagnant water located above the screened interval. One equivalent well volume is removed initially before measuring indicator parameters. Frequently, removal of the initial well volume reduces the hydraulic head and allows for matching of the recharge rate with the pumping rate, providing stabilization of drawdown. Indicator parameters should be measured, at five-minute intervals, using a flow-through chamber attached to a multi-parameter water quality instrument.When parameters have stabilized to within ±0.2 pH units, ±10% for temperature, conductivity, and DO, and ±10 mV for ORP over three consecutive readings, representative groundwater has been achieved for sampling. Turbidity is not included as a stabilization parameter, but turbidity levels of 10 NTU or less should be targeted. Very Low Yield Well Purging This technique provides the best option for wells that historically purge to dryness and do not sufficiently recharge to provide adequate volume for sample collection. The volume of the pumping system (i.e., the pump bladder, tubing, and flow-through chamber) is calculated for removal. Two volumes will be removed by the pumping system if pumping occurs at the lowest possible rate (≤100 milliliters per minute [mL/min]). Indicator parameters will be measured and recorded initially, and then sample collection will begin. 2.2.4 Sample Collection After representative groundwater has been obtained by purging and the indicator parameters have stabilized,sampling may begin. Sampling personnel must wear new, clean, disposable, non-powdered latex or nitrile gloves during sample collection for each well. Samples are collected in the following order: Metals Sulfate and chloride Nitrate Total dissolved solids Pertinent notations, water-level measurements, removed well volumes, and indicator parameters are documented on the Groundwater Monitoring Data Sheet. 2.2.5 Sample Containers, Volume, Preservative, and Holding Time Sample containers supplied by the laboratory for the collection of groundwater samples shall be new and precleaned, as approved by EPA procedures appropriate for the parameters of interest. Table 3 summarizes the sample containers, sample volume, preservation procedures, and holding times required for each type of sample and parameter. Sample containers are kept closed until used. Sample containers are provided by Duke or vendor laboratories. Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 10 of 14 2.3 Surface Water Sampling Surface water samples are collected using techniques and equipment that provide representative characteristics of the water body being investigated and reduces the chance for sample contamination. Typically, samples are collected by grab or peristaltic pump. When filling a sample container by grab, use new, clean, non-powdered latex or nitrile gloves. Grasp the sample container by the lower half and position the container opening to face upstream. When using a peristaltic pump to collect a surface water sample, position the intake opening above the stream bottom to reduce the potential for collecting sediment. Run the pump for several minutes so that representative water is being collected after positioning the intake opening. 2.4 Sample Tracking The Chain-Of-Custody (COC) program allows for tracing the possession and handling of individual samples from the time of field collection through laboratory analysis and report preparation. Samples are pre-logged prior to sample collection. This process assigns a unique tracking number for each sample and generates corresponding labels. An example of the COC Record is provided as Figure 6. 2.5 Sample Labeling Sample containers are pre-labeled and organized prior to field activities as part of the pre- sampling staging process. As samples are actually collected, the sampling personnel write the following information directly on the label: sampling date and time, and initials of sample collector. This information is also recorded on the Groundwater Monitoring Data Sheet (Figure 4) and the COC Record (Figure 6). 2.6 Field Documentation Field documentation from each sampling event is recorded on the Groundwater Monitoring Data Sheets, the Field Sampling Calibration Form, and the Chain-of-Custody Record. These sheets are arranged in sequential order and filed by project and date. Additionally, a Groundwater Sampling Site Checklist (Figure 7) is completed indicating information of the monitoring well such as proper identification (ID) tag, condition of protective casing and pad. Field notations are made during the course of the field work to document the following information: Identification of well Well depth Static water level depth and measurement technique Presence of immiscible layers and detection method Well yield—high or low Purge volume or pumping rate Sample identification numbers Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 11 of 14 Well evacuation procedure/equipment Sample withdrawal procedure/equipment Date and time of collection Types of sample containers used Identification of replicates or blind samples Preservative(s) used Parameters requested for analysis Field analysis data and methods Sample distribution and transporter Field observations during sampling event Name of sample collector(s) Climatic conditions including estimate of air temperature Recorded entries are made in indelible ink. Errors should be corrected by drawing one line through the error, initialing and dating the correction, and starting a new entry on the next line (if necessary). 2.7 Chain-of-Custody Record The chain-of-custody (COC) Record (Figure 6)accompanies the sample(s), traces sample possession from time of collection to delivery to the laboratory(s), and clearly identifies which sample containers have been designated for each requested parameter. The record includes the following types of information: Sample identification number Signature of collector Date and time of collection Sample type (e.g., groundwater, immiscible layer) Identification of well Number of containers Parameters requested for analysis Preservative(s) used Signature of persons involved in the chain of possession Inclusive dates of possession Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 12 of 14 2.8 Sample Custody, Shipment, and Laboratory Receipt For the purpose of these procedures, a sample is considered in custody if it is: In actual possession of the responsible person In view, after being in physical possession Locked or sealed in a manner so that no one can tamper with it, after having been in physical custody; or in a secured area, restricted to authorized personnel Samples are maintained in the custody of the sampling crew during the sampling event. At the end of each sampling day and prior to the transfer of the samples off-site, COC entries are completed on the COC for each sample. Upon transfer of custody, the COC form is signed by a sampling crew member, including the date and time. If outside vendor laboratories are utilized, samples are delivered to these facilities by Duke personnel or courier. COC forms received by the laboratory(s) are signed and dated by the respective supervising scientist(s) or their designee (at the Duke Energy lab), or the laboratory sample custodian (at vendor labs) immediately following receipt by the laboratory. The analysts at the laboratory(s) maintain a sample-tracking record that will follow each sample through each stage of laboratory processing. The sample tracking records show the date of sample extraction or preparation, and analysis. These records are used to determine compliance with holding time limits during lab audits and data validation. Custody procedures followed by Duke laboratory personnel are described in detail in the Duke Energy Laboratory Services Procedures Manual. 3 Analytical Procedures The main analytical laboratory used in this program is the Duke Energy Laboratory Services Laboratory, which has North Carolina Drinking Water (NC37804) and Wastewater (#248) Certifications. The organizational structure and staff qualifications of the laboratory are discussed in its generic Quality Assurance Program (QAP). The QAP and Laboratory Services Procedures Manual are available for review upon request. Vendor laboratories that meet EPA and North Carolina certification requirements may be used for analyses which cannot be performed in-house. The analytical procedures are listed in Table 2. Indicator parameters are measured in the field according to:Duke Energy Scientific Services Section Quality Assurance Plan and Procedure 3210.X.1 4 Internal Quality Control Checks Internal laboratory quality control (QC) checks used by the laboratories are described in their generic QAP and procedures manual. The laboratories demonstrate the ability to produce acceptable results using the methods specified. 1 “X” indicates the most current version of the procedure Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 13 of 14 Internal quality control checks for sampling procedures and laboratory analyses will be conducted with each sampling event. These checks will consist of the preparation and submittal of field blanks, trip (travel) blanks,and/or field replicates for analysis of each parameter at frequencies described in the laboratory(s) procedures manuals. Equipment rinsate blanks for laboratory-cleaned equipment will be collected quarterly. The field QC blanks and replicates may be included as internal QC checks are described as below. The specific type and number of blanks used may vary depending on the sampling event and will be determined by the Duke field sampling personnel: Field Blanks: A field blank consists of a sample container filled in the field with organic- free, deionized, or distilled water prepared and preserved in the same manner as the samples. The field blank is transported to the laboratory with the samples and analyzed along with the field samples for the constituents of interest to check for contamination imparted to the samples by the sample container, preservative, or other exogenous sources. Trip Blanks: A trip (travel) blank is a sample container filled with organic-free water in the laboratory that travels unopened with the sample bottles. It is returned to the laboratory with the field samples, and analyzed along with the field samples for parameters of interest. Field Replicates: A field replicate is a duplicate sample prepared at the sampling locations from equal portions of each sample aliquots combined to make the sample. Both the field replicate and the sample are collected at the same time, in the same container type, preserved in the same way, and analyzed by the same laboratory as a measure of sampling and analytical precision. Equipment Blanks: If non-dedicated equipment is used between wells, it is recommended that equipment blanks be collected. The field equipment is cleaned following documented cleaning protocols. An aliquot of the final control rinse water is passed over the cleaned equipment directly into a sample container and submitted for analyses. 5 Validation of Field Data Package The field data package includes complete field records and measurements developed by the sampling team personnel. The field data package validation procedure consists of the following: A review of field data contained on the Groundwater Monitoring Data Sheet for completeness Verification that equipment blanks, field blanks, and trip blanks were properly prepared, identified, and analyzed A check of the Field Sampling Calibration Form for equipment calibration and instrument conditions Water Quality Monitoring Plan – July 28, 2016 Duke Energy – Marshall Steam Station MSS FGD Landfill-Permit No. 18-09 Terrell, North Carolina Amec Foster Wheeler Project No. 7810160654 Page 14 of 14 A review of the Chain-Of-Custody Record for proper completion, signatures of field personnel and the laboratory sample custodian, dates, and for verification that the correct analyses were specified. 6 Validation of Laboratory Data The laboratory will perform a validation review of the submitted samples and analytical results to check that the laboratory QA/QC requirements are acceptable. 7 Report Submittal A report of monitoring results will be submitted to the DEQ Division of Waste Management (DWM) within 120 days following the date of sampling. The report submittal will consist of the following: Environmental Monitoring Reporting Form (DEQ Form) Table of Detections and Discussion of 2L Exceedances Groundwater Elevation Contour Map Electronic Data Deliverable (EDD) in Excel Format DEQ will be notified in the event that vendor lab analyses have not been completed within this time frame. The Groundwater Monitoring Data Sheet, Field Calibration Forms, Chain-of- CustodyRecords, Laboratory(s) QA data, and Data Validation Checklists are kept on file by Duke and are available upon request. FIGURES APPROXIMATE LANDFILL BOUNDARY LAKENORMAN HIGHWAY NC 150 1000 2000 0 1000 ALTAMONT ENVIRONMENTAL,INC. Notes: 1. Source: USGS Topographic Map - Lake Norman NorthQuadrangle. Created 1993.2. Map does not reflect realignment of Steam Plant Road. 1 Typical Well Construction Details (no scale) 3 ALTAMONT ENVIRONMENTAL,INC. 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Electrode Tip INSTRUMENT MAINTENANCE DATE / TIME Conductance Subsystem pH Subsystem Cleaned Electrodes Cleaned Electrodes Temp Cert Device # TEMP (deg C) Adjustment Not Available Adjustment Not Available TURB (ntu) DO (mg/L)After Cal % SAT After Cal % SAT ORP Temp. ORP Temp. ORP Buffer Temp. Buffer Temp. Buffer Temp. pH (units) Specifc conductance checkpoint (used if sampled well is outside of initial calibration range). SPEC. COND. CHECK (uS/cm) SPEC. COND. (uS/cm) INSTRUMENT ZEROED INSTRUMENT ZEROED Parameter Calibration Results Calibration Results CALIBRATION BP (mmHg)0.00 CALIBRATION BP (mmHg)0.00 COLLECTORS: SURFACE UNIT SERIAL #: ANALYZER MODEL#: Calibration Date / Time PROCEDURE #:HYDROLAB 3210.6 VALIDATED BY: FIELD SAMPLING CALIBRATION FORM STUDY: DATE (s): SURFACE UNIT READER: OTHER EQUIPMENT:TURBIDIMETER NO.2 - 3260-GW &/'hZϱ LI M S # 2) P h o n e N o : 7) R e s p . T o : LA B U S E O N L Y *7 Days _____________ 23 ) S e a l / L o c k e d B y D a t e / T i m e S e a l e d / L o c k O p e n e d B y D at e / T i m e * 48 Hr _____________ 21 ) R e l i n q u i s h e d B y D a t e / T i m e A c c e p t e d B y : D a t e / T i m e 14 Days ______¥______ 21 ) R e l i n q u i s h e d B y D a t e / T i m e A c c e p t e d B y : D a t e / T i m e Cu s t o m e r t o s i g n & d a t e b e l o w 21 ) R e l i n q u i s h e d B y D a t e / T i m e A c c e p t e d B y : D a t e / T i m e Customer, important please indicate desired turnaround 22 Requested Turnaround 24 ) C o m m e n t s : *Other ______________ * Add. Cost Will Apply 9) A c t i v i t y I D : 1 0 ) M a i l C o d e : Cu s t o m e r t o c o m p l e t e a l l a p p r o p r i a t e NO N - SH A D E D a r e a s . 1 6 A n a l y s e s R e q u i r e d 11 La b I D Da t e T i m e S i g n a t u r e 20Total # of Containers 5) B u s i n e s s U n i t : 6 ) P r o c e s s : MR # Vo l u m e C u s t o m e r t o c o m p l e t e a p p r o p r i a t e c o l u m n s t o r i g h t 13 Sa m p l e D e s c r i p t i o n o r I D 14 Co l l e c t i o n I n f o r m a t i o n T E S T S 1 8 G r a b 8) T a s k I D : Lo g g e d B y D a t e & T i m e SA M P L E P R O G R A M Gr o u n d W a t e r _ _ N P D E S _ _ __ Dr i n k i n g W a t e r _ _ _ _ U S T _ _ _ _ RC R A W a s t e _ _ _ _ Ve n d o r : C o o l e r T e m p ( C ) CH A I N O F C U S T O D Y R E C O R D A N D A N A L Y S I S R E Q U E S T F O R M Du k e E n e r g y A n a l y t i c a l L a b o r a t o r i e s An a l y t i c a l L a b o r a t o r y U s e O n l y 19 Page __1 _ of _1 __ DISTRIBUTION ORIGINAL to LAB, COPY to CLIENT M a il C o d e MG 0 3 A 2 (B u il d i ng 74 0 5 ) 13 3 3 9 H a g e r s F e r r y R d Hu n t e r s v i l l e , N . C . 2 8 0 7 8 (9 8 0 ) 8 7 5 - 5 2 4 5 Fa x : ( 9 8 0 ) 8 7 5 - 5 0 3 8 MA T R I X : G W - W W Sa m p l e s Or i g i n a t i n g F r o m NC__ SC___Revised: 10/21/15 C u s t o m e r m u s t C o m p l e t e 1) P r o j e c t N a m e : 3) C l i e n t 4 ) F a x N o : PO # 15 Pr e s e r v . : 1 = H C L 2= H 2 SO 4 3= H N O 3 4= I c e 5 = N o n e &/ ' h Z ϲ W Z D / d η >Ă Đ Ŭ Ɛ ƌ Ğ Ƌ Ƶ ŝ ƌ Ğ Ě ŝ Ŷ Ĩ Ž ƌ ŵ Ă ƚ ŝ Ž Ŷ Ͳ d Ž ƚ Ă ů ǁ Ğ ů ů Ě Ğ Ɖ ƚ Ś >Ă Đ Ŭ Ɛ ƌ Ğ Ƌ Ƶ ŝ ƌ Ğ Ě ŝ Ŷ Ĩ Ž ƌ ŵ Ă ƚ ŝ Ž Ŷ Ͳ Ğ Ɖ ƚ Ś ƚ Ž Ɛ Đ ƌ Ğ Ğ Ŷ >Ă Đ Ŭ Ɛ ƌ Ğ Ƌ Ƶ ŝ ƌ Ğ Ě ŝ Ŷ Ĩ Ž ƌ ŵ Ă ƚ ŝ Ž Ŷ Ͳ E Ž Ŷ Ɖ Ž ƚ Ă ď ů Ğ ƚ Ă Ő EK d ͗ >Ă Đ Ŭ Ɛ ƌ Ğ Ƌ Ƶ ŝ ƌ Ğ Ě ŝ Ŷ Ĩ Ž ƌ ŵ Ă ƚ ŝ Ž Ŷ Ͳ Ž ŵ Ɖ ů Ğ ƚ ŝ Ž Ŷ Ě Ă ƚ Ğ &> h ^ , D K h E d t > > ^ sĂ Ƶ ů ƚ ŝ Ŷ Ő Ž Ž Ě Đ Ž Ŷ Ě ŝ ƚ ŝ Ž Ŷ tĂ ƚ Ğ ƌ ŝ Ŷ Ɛ ŝ Ě Ğ ǀ Ă Ƶ ů ƚ sĂ Ƶ ů ƚ ď Ž ů ƚ Ś Ž ů Ğ Ɛ ď ƌ Ž Ŭ Ğ Ŷ Ž ƌ Ɛ ƚ ƌ ŝ Ɖ Ɖ Ğ Ě Ž ů ƚ Ɛ Ɛ ƚ ƌ ŝ Ɖ Ɖ Ğ Ě sĂ Ƶ ů ƚ ů ŝ Ě Đ ƌ Ă Đ Ŭ Ğ Ě Ž ƌ ď ƌ Ž Ŭ Ğ Ŷ t > > / d ' ^ tĞ ů ů ƚ Ă Ő ŝ Ŷ Ő Ž Ž Ě Đ Ž Ŷ Ě ŝ ƚ ŝ Ž Ŷ tĞ ů ů ƚ Ă Ő ŵ ŝ Ɛ Ɛ ŝ Ŷ Ő tĞ ů ů ƚ Ă Ő Ě Ă ŵ Ă Ő Ğ Ě ͬ ŝ ů ů Ğ Ő ŝ ď ů Ğ >Ă Đ Ŭ Ɛ ƌ Ğ Ƌ Ƶ ŝ ƌ Ğ Ě ŝ Ŷ Ĩ Ž ƌ ŵ Ă ƚ ŝ Ž Ŷ Ͳ ƌ ŝ ů ů Ğ ƌ Z Ğ Ő η ZĞ Ɖ ů Ă Đ Ğ Ě Ě Ă ŵ Ă Ő Ğ Ě ǁ Ğ ů ů Đ Ă Ɖ &ŝ ƌ Ğ Ă Ŷ ƚ Ɛ Ă ƌ Ž Ƶ Ŷ Ě Đ Ž Ŷ Đ ƌ Ğ ƚ Ğ Ɖ Ă Ě t > > W Z K d d / s ^ / E ' ^ Ă Ɛ ŝ Ŷ Ő ŝ Ŷ Ő Ž Ž Ě Đ Ž Ŷ Ě ŝ ƚ ŝ Ž Ŷ Ă ŵ Ă Ő Ğ Ě Đ Ă Ɛ ŝ Ŷ Ő ͬ Ɛ ƚ ŝ ů ů Ĩ Ƶ Ŷ Đ ƚ ŝ Ž Ŷ Ă ů Ă ŵ Ă Ő Ğ Ě Đ Ă Ɛ ŝ Ŷ Ő ͬ ƌ Ğ Ɖ Ă ŝ ƌ ƌ Ğ Ƌ Ƶ ŝ ƌ Ğ Ě ƌ Ž Ŭ Ğ Ŷ Ś ŝ Ŷ Ő Ğ Ž Ŷ Ɖ ƌ Ž ƚ Ğ Đ ƚ ŝ ǀ Ğ ů ŝ Ě tĂ Ɛ Ɖ Ŷ Ğ Ɛ ƚ ŝ Ŷ Ɛ ŝ Ě Ğ Ɖ ƌ Ž ƚ Ğ Đ ƚ ŝ ǀ Ğ Đ Ă Ɛ ŝ Ŷ Ő Ŷ ƚ Ɛ ŝ Ŷ Ɛ ŝ Ě Ğ Ɖ ƌ Ž ƚ Ğ Đ ƚ ŝ ǀ Ğ Đ Ă Ɛ ŝ Ŷ Ő t > > W ^ tĞ ů ů Đ Ă Ɖ ŝ Ŷ Ő Ž Ž Ě Đ Ž Ŷ Ě ŝ ƚ Ž Ŷ Ă ŵ Ă Ő Ğ Ě ͬ Ŷ Ğ Ğ Ě Ɛ ƌ Ğ Ɖ ů Ă Đ Ğ ŵ Ğ Ŷ ƚ hŶ Ě Ğ ƌ ŵ ŝ Ŷ Ğ Ě ͬ ǁ Ă Ɛ Ś ŝ Ŷ Ő Ž Ƶ ƚ >Ž Đ Ŭ ŝ Ŷ Ő Ž Ž Ě Đ Ž Ŷ Ě ŝ ƚ ŝ Ž Ŷ >Ž Đ Ŭ ƌ Ƶ Ɛ ƚ Ğ Ě ͕ Ě ŝ Ĩ Ĩ ŝ Đ Ƶ ů ƚ ƚ Ž Ž Ɖ Ğ Ŷ ͬ Ŷ Ğ Ğ Ě Ɛ ƌ Ğ Ɖ ů Ă Đ ŝ Ŷ Ő ZĞ Ɖ ů Ă Đ Ğ Ě Ě Ă ŵ Ă Ő Ğ Ě ů Ž Đ Ŭ t > > ^ / E ' ^ Ă Ɛ ŝ Ŷ Ő ŝ Ŷ Ő Ž Ž Ě Đ Ž Ŷ Ě ŝ ƚ ŝ Ž Ŷ Ă ŵ Ă Ő Ğ Ě Đ Ă Ɛ ŝ Ŷ Ő ͬ Ɛ ƚ ŝ ů ů Ĩ Ƶ Ŷ Đ ƚ ŝ Ž Ŷ Ă ů Ă ŵ Ă Ő Ğ Ě Đ Ă Ɛ ŝ Ŷ Ő ͬ ƌ Ğ Ɖ Ă ŝ ƌ ƌ Ğ Ƌ Ƶ ŝ ƌ Ğ Ě K E Z d W ^ WĂ Ě ŝ Ŷ Ő Ž Ž Ě Đ Ž Ŷ Ě ŝ ƚ ŝ Ž Ŷ DŝŶ Ž ƌ Đ ƌ Ă Đ Ŭ Ɛ DĂ ũ Ž ƌ Đ ƌ Ă Đ Ŭ Ɛ ͬ ď ƌ Ž Ŭ Ğ Ŷ ͬ ƌ Ğ Ɖ Ă ŝ ƌ ƌ Ğ Ƌ Ƶ ŝ ƌ Ğ Ě t > > > K < K E / d / K E W ' ϭ K & ϭ ^ ^ d K t > > ^ Đ Đ Ğ Ɛ Ɛ Đ ů Ğ Ă ƌ Ğ Ě ŝ Ŷ ƚ Ž ǁ Ğ ů ů Đ Đ Ğ Ɛ Ɛ Đ ů Ğ Ă ƌ Ğ Ě Ă ƌ Ž Ƶ Ŷ Ě ǁ Ğ ů ů dĂ ů ů Ő ƌ Ă Ɛ Ɛ Ž ƌ ǁ Ğ Ğ Ě Ɛ Ͳ Ŷ Ğ Ğ Ě Ɛ ŵ Ž ǁ ŝ Ŷ Ő ZŽ Ă Ě ǁ Ă Ɛ Ś ŝ Ŷ Ő Ž Ƶ ƚ ͬ ŵ Ƶ Ě Ě LJ ͬ Ŷ Ğ Ğ Ě Ɛ Ő ƌ Ă Ě ŝ Ŷ Ő &Ă ů ů Ğ Ŷ ƚ ƌ Ğ Ğ ď ů Ž Đ Ŭ ŝ Ŷ Ő Ă Đ Đ Ğ Ɛ Ɛ t > > ^ h Z / d z tĞ ů ů Ĩ Ž Ƶ Ŷ Ě ů Ž Đ Ŭ Ğ Ě tĞ ů ů Ĩ Ž Ƶ Ŷ Ě Ƶ Ŷ ů Ž Đ Ŭ Ğ Ě ^/ d K E d d &/ > Z t t d , Z EK Z d , Z K > / E ' Z K h E t d Z ^ D W > / E ' ^ / d , < > / ^ d >K d / K E ͬ ^ / d ^ D W > d &/ ' h Z ϳ TABLES MS - 8 M S - 9 M S - 1 0 M S - 1 1 M S - 1 2 M S - 1 3 M S - 1 4 M S - 1 5 M S - 1 6 Pr e v i o u s W e l l N a m e N / A N / A N / A N / A O W - 3 M S - 6 B - 5 B - 4 N / A No r t h i n g 6 8 0 , 7 1 7 . 8 9 6 8 1 , 3 8 4 . 4 5 6 8 1 , 0 2 7 . 6 5 6 8 0 , 2 9 7 . 4 9 6 7 9 , 5 4 0 . 0 4 6 7 9 , 7 3 2 . 8 0 6 7 9 , 9 6 8 . 4 1 6 8 0 , 4 2 8 . 0 2 6 8 1 , 1 4 3 . 0 2 Ea s t i n g 1 , 4 1 2 , 0 2 7 . 9 8 1 , 4 1 2 , 1 8 1 . 7 4 1 , 4 1 1 , 6 2 2 . 4 6 1 , 4 1 1 , 5 6 4 . 8 2 1 , 4 1 2 , 0 8 6 . 5 0 1 , 4 1 2 , 5 0 0 . 6 8 1 , 4 1 3 , 1 2 3 . 8 9 1 , 4 1 2 , 9 9 3 . 2 7 1 , 4 1 2 , 4 8 6 . 1 9 Ty p e o f C a s i n g P V C P V C P V C P V C P V C P V C P V C P V C P V C To p o f C a s i n g E l e v a t i o n ( f t ) 8 7 2 . 3 4 8 6 8 . 0 4 8 5 1 . 2 9 8 5 9 . 7 8 8 3 5 . 6 6 8 4 1 . 9 0 8 4 4 . 0 7 8 6 1 . 4 7 8 3 6 . 9 8 Well D i a m e t e r ( i n c h e s ) 2 2 2 2 2 2 2 2 2 We l l S t i c k - u p ( f t - a g s ) 3 2 . 6 8 3 2 . 9 1 2 . 9 6 2 . 7 1 2 . 8 0 3 . 0 5 3 Total D e p t h ( f t - b g s ) 4 8 5 0 2 0 3 9 2 7 3 8 4 1 5 9 3 4 Sc r e e n L e n g t h ( f t ) 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Sc r e e n I n t e r v a l ( f t - b g s ) 3 8 t o 4 8 4 0 t o 5 0 1 0 t o 2 0 2 9 t o 3 9 1 7 t o 2 7 2 8 t o 3 8 3 1 t o 4 1 4 9 t o 5 9 2 4 t o 3 4 No t e s : As - b u i l t w e l l c o o r d i n a t e s a n d t o p o f P V C c a sin g e l e v a t i o n s p r o v i d e d b y D u k e E n e r g y We l l d e p t h a n d s c r e e n i n f o r m a t i o n w a s o b t a i n e d f r o m t h e W e l l C o n s t r u c t i o n R e c o r d s Co o r d i n a t e s a r e N C S t a t e P l a n e G r i d , N A D 8 3 SW - 1 El e v a t i o n s a r e N A V D 8 8 67 9 , 6 1 1 . 0 0 N / A = N o t A p p l i c a b l e 1, 4 1 2 , 3 4 1 . 3 0 ft = f e e t 82 2 . 3 0 ft - a g s = f e e t a b o v e g r o u n d s u r f a c e ft - b g s = f e e t b e l o w g r o u n d s u r f a c e Ta b l e 1 Mo n i t o r i n g W e l l I n f o r m a t i o n Ta b l e 1 . 1 Su r f a c e W a t e r S a m p l e L o c a t i o n PARAMETER UNITS ANALYTICAL METHOD In Situ Parameters Field pH pH Units Multi-Parameter Water Quality Meter Field Specific Conductance μmhos/cm Multi-Parameter Water Quality Meter Field Temperature Celsius Multi-Parameter Water Quality Meter Field Dissolved Oxygen mg/L Multi-Parameter Water Quality Meter Field Oxidation Reduction Potential mV Multi-Parameter Water Quality Meter Field Turbidity NTU Turbidimeter Water Level ft Water Level Meter Laboratory Analyses Antimony μg/L EPA 200.7/EPA 6010 Arsenic μg/L EPA 200.8/EPA 6020 Barium μg/L EPA 200.7/EPA 6010 Beryllium μg/L EPA 200.7/EPA 6010 Boron μg/L EPA 200.7/EPA 6010 Cadmium μg/L EPA 200.8/EPA 6020 Chloride mg/L EPA 300.0 Chromium μg/L EPA 200.7/EPA 6010 Cobalt μg/L EPA 200.7/EPA 6010 Copper μg/L EPA 200.7/EPA 6010 Fluoride mg/L EPA 300.0 Iron μg/L EPA 200.7/EPA 6010 Lead μg/L EPA 200.8/EPA 6020 Manganese μg/L EPA 200.7/EPA 6010 Mercury μg/L EPA 7470 Nickel μg/L EPA 200.7/EPA 6010 Nitrate mg/L EPA 300.0 Selenium μg/L EPA 200.8/EPA 6020 Silver μg/L EPA 200.7/EPA 6010 Sulfate mg/L EPA 300.0 Thallium μg/L EPA 200.8/EPA 6020 Total Dissolved Solids mg/L SM 2540C Vanadum μg/L EPA 200.8/EPA 6020 Zinc μg/L EPA 200.7/EPA 6010 Notes: mhos/cm = micro-ohms per centimeter mg/L = milligrams per liter mV = millivolts NTU = nephelometric turbidity units ft = feet g/L = micrograms per liter Sample Parameters and Analytical Methods Table 2 PARAMETER CONTAINERS PRESERVATIVES HOLDING TIMES In Situ Parameters Field pH In Situ None Analyze Immediately Field Specific Conductance In Situ None Analyze Immediately Field Temperature In Situ None Analyze Immediately Field Dissolved Oxygen In Situ None Analyze Immediately Field Oxidation Reduction Potential In Situ None Analyze Immediately Field Turbidity In Situ None Analyze Immediately Laboratory Analyses Antimony 500 mL HDPE 6 months Arsenic 500 mL HDPE 6 months Barium 500 mL HDPE 6 months Beryllium 500 mL HDPE 6 months Boron 500 ml HDPE 6 months Cadmium 500 mL HDPE 6 months Chloride 500 mL HDPE Cool to 4°Celsius 28 days Chromium 500 mL HDPE 6 months Cobalt 500 mL HDPE 6 months Copper 500 mL HDPE 6 months Fluoride 500 mL HDPE 28 days Iron 500 mL HDPE 6 months Lead 500 mL HDPE 6 months Manganese 500 mL HDPE 6 months Mercury 500 mL HDPE 28 days Nickel 500 mL HDPE 6 months Nitrate 500 mL HDPE Cool to 4°Celsius 48 hours Selenium 500 mL HDPE 6 months Silver 500 mL HDPE 6 months Sulfate 500 mL HDPE Cool to 4°Celsius 28 days Thallium 500 mL HDPE 6 months Total Dissolved Solids 500 mL HDPE Cool to 4°Celsius 7 days Vanadium 500 mL HDPE 6 months Zinc 500 mL HDPE 6 months Notes: mL = milliliter HDPE = high density polyethylene HNO3 = nitric acid Table 3 Sample Containers, Preservatives, and Holding Times APPENDIX A Monitoring Well Construction Records : MONITORING WELL CONSTRUCTION WELL ID: MS-8 TOTAL DEPTH: 48.5 ft bls S&ME PROJECT AND NO: WELL USE / TYPE: INSTALLATION DATE: Marshall Steam Station, 1356-06-728 Monitoring 9/12/2006 DRILLING CONTRACTOR: DRILLER AND LICENCE NO.: DRILLING METHOD: S&ME, Inc. Larry Shrader, 3349 4.25 H.S.A. WATER LEVEL AT TOB: NORTHING: EASTING: TOP OF CASING ELEV. GROUND SURFACE ELEV.: 42.45 ft bls 681496.7 1412015.4 872.34 869.35 PAD TYPE: Stickup (ft): ~ 3 ft 872.34 2'x2' Concrete PROTECTIVE CASING: Depth BLS 4"x4" Lockable Steel 0 ft - Top of Grout 869.35 CASING TYPE: 2-inch Sch. 40 PVC CASING INTERVAL: 0 to 38 ft bls SCREEN TYPE: 2-inch 0.010 Slot Sch. 40 PVC SCREEN INTERVAL 38 to 48 ft bls GROUT TYPE: Neat Cement GROUT INTERVAL 34 ft - Top of Seal 835.35 0 to 34 ft bls SEAL TYPE: 36 ft - Top of Filter Pack 833.35 Bentonite SEAL INTERVAL: 38 ft - Top of Screen 831.35 36 to 38 ft bls FILTER PACK: #1 Filter Sand FILTER PACK INTERVAL: 36 to 48 ft bls Screened DEVELOPMENT: Interval Purged ~15 Gallons 10 feet NOTES: TBD - To Be Determined 48 ft - Bottom of Screen 821.35 Cave In 820.85 For Lithologic Information See 48.5 ft bls - Total Depth Attached Boring Log : MONITORING WELL CONSTRUCTION WELL ID: MS-16 TOTAL DEPTH: 35 ft bls S&ME PROJECT AND NO: WELL USE / TYPE: INSTALLATION DATE: Marshall Steam Station, 1356-06-728 Monitoring 9/11/2006 DRILLING CONTRACTOR: DRILLER AND LICENCE NO.: DRILLING METHOD: S&ME, Inc. Larry Shrader, 3349 4.25 H.S.A. WATER LEVEL AT TOB: NORTHING: EASTING: TOP OF CASING ELEV. GROUND SURFACE ELEV.: 26 ft bls 681142.3 1412485.1 837.31 834.25 PAD TYPE: Stickup (ft): ~3.0 ft 837.31 2'x2' Concrete PROTECTIVE CASING: Depth BLS 4"x4" Lockable Steel 0 ft - Top of Grout 834.25 CASING TYPE: 2-inch Sch. 40 PVC CASING INTERVAL: 0 to 24 ft bls SCREEN TYPE: 2-inch 0.010 Slot Sch. 40 PVC SCREEN INTERVAL 24 to 34 ft bls GROUT TYPE: Neat Cement GROUT INTERVAL 20 ft - Top of Seal 814.25 0 to 20 ft bls SEAL TYPE: 22 ft - Top of Filter Pack 812.25 Bentonite SEAL INTERVAL: 24 ft - Top of Screen 810.25 20 to 22 ft bls FILTER PACK: #1 Filter Sand FILTER PACK INTERVAL: 22 to 34 ft bls Screened DEVELOPMENT: Interval Purged ~15 Gallons 10 feet NOTES: TBD - To Be Determined 34 ft - Bottom of Screen 800.25 Cave In 799.25 For Lithologic Information See 35 ft - Total Depth Attached Boring Log