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HomeMy WebLinkAboutNCS000606_HNP SWPPP Rev 5 Sept 2020_20220630STORM WATER POLLUTION PREVENTION PLAN HARRIS NUCLEAR PLANT 5413 Shearon Harris Road New Hill, North Carolina 27562 Duke Energy Progress, LLC Revision 5 September 2020 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Contents 1.0 General Requirements.......................................................................................1 1.1 Purpose...........................................................................................................1 1.2 SWPPP Development.....................................................................................1 1.3 Management Certification................................................................................2 2.0 Storm Water Pollution Prevention Plan.............................................................. 3 2.1 Site Overview.................................................................................................. 3 2.2 Storm Water Management Strategy................................................................ 5 2.3 Spill Prevention and Response Procedure....................................................16 2.4 Preventative Maintenance and Good Housekeeping Program ......................17 2.5 Facility Inspections........................................................................................17 2.6 Employee Training.........................................................................................18 2.7 Responsible Party.........................................................................................18 2.8 Storm Water Pollution Prevention Plan Amendment and Annual Update ...... 18 2.9 Storm Water Pollution Prevention Plan Implementation................................19 3.0 Storm Water Monitoring...................................................................................20 3.1 Analytical Monitoring Requirements..............................................................20 3.2 Qualitative Monitoring Requirements.............................................................20 Appendices Appendix A ............. Site Maps Appendix B............. Storm Water Outfall Summaries Appendix C............. NPDES Permitted Wastewater Outfalls Summary Appendix D............. Spills and Leaks History Appendix E............. Non -Storm Water Discharge Certification Appendix F............. Material Inventory, Storage and Secondary Containment Appendix G ............ Spill Prevention and Response Procedures Appendix H............. Best Management Practices - Preventative Maintenance and Good Housekeeping Program Appendix I .............. SWPPP Inspection Records Appendix J ............. Employee Training Records Appendix K............. Record of SWPPP Amendments and Annual Updates Appendix L ............. Analytical Monitoring Procedures and Results Documentation Appendix M ............ Qualitative Monitoring Procedures and Results Documentation Appendix N............. Storm Water Permit Appendix O ............ Table 2 - Industrial Storm Water Fact Sheet - Sector O: Steam Electric Power Generating Facilities Page 2 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 1.0 General Requirements 1.1 Purpose The North Carolina Department of Environmental Quality (NCDEQ) has issued Duke Energy Progress, LLC a National Pollutant Discharge Elimination System (NPDES) permit for the Harris Nuclear Plant. The permit authorizes the permittee to discharge storm water from the station in accordance with the discharge limitations, monitoring requirements and other conditions set forth in the permit. The permit number is NCS0039586 and expires on August 31, 2021. 1.2 SWPPP Development The permit requires the permittee to develop and implement a Storm Water Pollution Prevention Plan (SWPPP) for the station. The SWPPP is a comprehensive site -specific plan which details measures and practices at the station to reduce and/or eliminate storm water pollution and is based on an evaluation of the pollution potential of the site. The body of this document focuses on development of the SWPPP and the framework of permit compliance which will likely remain unchanged throughout the permit cycle. Where significant changes do occur to the content of the body of the SWPPP, the plan will be amended as required by the permit conditions. The body of the SWPPP is developed to sequentially and specifically address the requirements of Part I of the permit and provides references to the subsections of the permit. Due to the fluid nature of implementing a SWPPP for a complex site such as the Harris Nuclear Plant, the detailed content and documentation of the frequent plan responsibilities are compiled in the appendices. The series of appendices includes SWPPP content in more concise formats such as fact sheets, tables, forms, data, and procedures which can be easily amended for site changes or completed for demonstration of compliance. The appendices may grow in content through the permit cycle as the SWPPP evolves to adapt to changing site conditions and operations. In addition, the Harris Nuclear Plant may utilize company software and databases to ensure the scheduling, completion, and documentation of SWPPP requirements. E-Track is an event management database system used to schedule deadlines for reoccurring events such as inspections, monitoring, and annual updates or record significant events, such as reportable spills. The system provides for ownership of tasks, assignment of staff, electronic notification, and simple documentation of event completion. It may be used to the extent it aids in the implementation of the SWPPP and therefore be a repository of permit compliance. To the extent possible, output from the system will be compiled for archival in the SWPPP. Another database system, Consolidated Access Suite (CAS), may be utilized in conjunction with E-Track to document station operations that demonstrate compliance with the permit requirements. Typically, this system is used to direct maintenance and operational tasks for the purposes of sustaining power generation thereby limiting failures in service and equipment that may Page 3 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 otherwise contribute to storm water contamination or unauthorized discharges. These systems will be periodically referenced for their use in scheduling implementation and documenting compliance. 1.3 Management Certification "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name: John R. Dills Signature: Date: Page 4 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 2.0 Storm Water Pollution Prevention Plan 2.1 Site Overview 2.1.1 General Location Map NPDES Permit Reference: Part 1, Section A 21.2a(1) A general location map of the facility is provided in Appendix A. The facility address is 5413 Shearon Harris Road, New Hill, NC 27562. 2.1.2 Narrative Description NPDES Permit Reference: Part 1, Section A 21.2a(2) The Harris Nuclear Plant is an electric generating station located on Shearon Harris Reservoir in the southwestern region of Wake County, North Carolina. The plant is located near the community of New Hill, and approximately 22 miles southwest of Raleigh, North Carolina. The plant property is comprised of approximately 8,351 acres. The plant is owned and operated by Duke Energy Progress, LLC. The Harris Nuclear Plant began commercial operation on May 2, 1987, and consists of one 1039 MW (gross) pressurized water nuclear reactor unit and associated support facilities. Primary structures contiguous with the reactor unit containment include a reactor auxiliary building, a turbine building, a fuel handling building, an operations building, and a waste processing building. Separate structures include a security building, an administration building, a cooling tower, a service building, various warehouses, a chemical storage building, a diesel generator building, a water treatment building, diesel fuel storage tanks, numerous transformers, an electrical switchyard, a security firing range and other support facilities. Service water and make-up water needed to replace cooling water lost through evaporation is withdrawn into the plant through the Make -Up Intake Structure. The intake structure is located at the end of a canal connected to the main body of Shearon Harris Reservoir southeast of the plant. Emergency service water for the plant is withdrawn from the Emergency Service Water Intake Channel. This channel is connected to the upper Auxiliary Reservoir located west of the plant. Emergency service water is discharged through a canal back into the upper Auxiliary Reservoir. Both intake canals and the discharge canal are designated as waters of the United States. Page 5 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 The industrial use area of the plant is comprised of twelve storm water drainage areas. Ground cover at the facility is comprised of a combination of building roofs, paved access roads and parking areas, gravel -surfaced areas, and grassed and wooded areas. Approximately 16% of the total industrial use area of the facility is impervious. Drainage area delineations and outfall locations are indicated on the site map in Appendix A. Summary sheets for each storm water outfall, including description of the outfall, description of the contributing drainage area, significant materials and activities, and best management practices (BMPs) are provided in Appendix B. The plant has five internal wastewater outfalls and one combined, external wastewater outfall. A summary table of the NPDES permitted wastewater outfalls is provided in Appendix C. All storm water runoff from the plant enters the adjoining Shearon Harris Reservoir. The reservoir has a full pond elevation of 220 feet above mean sea level. The reservoir spillway discharges into Buckhorn Creek and subsequently into the Cape Fear River approximately 2 miles to the south. In addition to the significant materials particular to each drainage basin, herbicides are applied to selected areas throughout the plant to eliminate undesirable vegetation. All herbicides used at the facility are approved by the company and considered safe to the environment when used according to directions. Records are retained by the vendor and at the plant documenting areas treated, specific herbicides used, and application quantities. 2.1.3 Site Map NPDES Permit Reference: Part 1, Section A 21.2a(3) A site map of the facility is provided In Appendix A. 2.1.4 Significant Spills and Leaks NPDES Permit Reference: Part 1, Section A 21.2a(4) All spills or leaks including but not limited to, releases of oil or hazardous substances in excess of reportable quantities under section 311 of the Clean Water Act (40 CFR 110.3 and 40 CFR 117.3) or section 102 of CERCLA (40 CFR 302.4) are documented by the Site Environmental Coordinator(s). The Site Environmental Coordinator(s) records the details of the spill and any corrective actions taken to mitigate spill impacts. All environmental incidences at the plant are stored for review in the station's Corrective Action System (CAS) or similar record retention system. The Site Environmental Coordinator(s) shall update the list of significant spills and leaks for the previous three years by May 31 of every permit year and place a copy in Appendix D of this plan. Page 6 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 2.1.5 Non -Storm Water Discharge Certification NPDES Permit Reference: Part 1, Section A 21.2a(5) An evaluation for non -storm water discharges shall be performed annually by the Site Environmental Coordinator(s). The evaluation shall determine if a non -storm water discharge is present or otherwise how that discharge is permitted or otherwise authorized. Supporting evaluation information and a copy of the certification shall be included in Appendix E. Allowable non -storm water discharges include: • Foundation drains and natural springs; • Flows from riparian habitats and wetlands; • Air conditioner condensate that includes no added chemicals; • Waterline and fire hydrant flushing; • Discharging from fire -fighting, fire -fighting training, and fire system testing; • All other discharges authorized by an NPDES permit. 2.2 Storm Water Management Strategy 2.2.1 Feasibility Study NPDES Permit Reference: Part 1, Section A 21.2b(1) This section provides a review of the technical feasibility of changing the methods of operations and/or storage practices to eliminate or reduce exposure of materials and processes to rainfall and storm water runoff. Below are descriptions of the existing operations at the plant that present the potential for negative impacts to storm water runoff. These descriptions demonstrate the current practices in use to prevent exposure of storage areas, material handling operations and fueling operations. Page 7 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 DIESEL FUEL AND GASOLINE STORAGE Diesel fuel and gasoline is stored at the plant in several different tanks and containers at the plant. The diesel fuel is primarily used as fuel for emergency diesel generators at the plant. The diesel fuel and gasoline is used to fuel plant vehicles and miscellaneous equipment. The largest containers at the plant are two 175,000 gallon underground diesel fuel storage tanks located north of the plant, and two 110,000 gallon field -erected aboveground diesel fuel storage tanks located in the southwestern area of the plant yard. The aboveground tanks are located within a single common concrete secondary containment structure equipped with a closed drain valve. Drainage from the containment discharges into the plant 10,000 gallon capacity Oil/Water Separator. The plant contains eight additional aboveground diesel fuel tanks, one aboveground gasoline tank, and numerous 55 gallon petroleum storage drums. The remaining tanks are small, shop -fabricated steel tanks maintained at various locations around the plant. The plant contains one 1,000 gallon underground diesel fuel storage tank at the Security Building, and one 10,000 gallon underground diesel fuel storage tank and one 10,000 gallon underground gasoline storage tank in the Mobile Equipment Area. The plant also maintains one small diesel fuel tank and one small gasoline tank on a mobile fuel truck. A complete listing of these containers, including inspection and testing requirements, secondary containment descriptions and inspection requirements, and tanker unloading operation requirements are described in detail in the Harris Nuclear Plant SPCC Plan. All diesel fuel and gasoline storage tanks are provided with some means of passive secondary containment or are integral double -walled containers as described in detail in the Harris Nuclear Plant SPCC Plan. All external containments are inspected prior to being manually drained in accordance with the SPCC Plan. Secondary containments either drain into the plant 10,000 gallon capacity Oil/Water Separator, or onto the plant yard. Mobile tanks are stored in areas that drain to the Oil/Water Separator while in standby mode. Refueling operations for all diesel fuel and gasoline containers are conducted in constant attendance in accordance with plant procedures and the Harris Nuclear Plant SPCC Plan. Tanker trucks are brought on -site to refill the two 175,000 gallon underground diesel fuel storage tanks and the two aboveground 110,000 gallon diesel fuel storage tanks. Tanker unloading into the two 175,000 gallon underground storage tanks, and into the two 110,000 gallon aboveground storage tanks, is conducted on a concrete containment pad adjacent to the tanks. The containment is equipped with open drains to the Oil/Water Separator. Tanker trucks are also brought on -site to refill the other aboveground and underground diesel fuel and gasoline tanks. These tankers unloading operations are conducted adjacent to the containers and in constant attendance in accordance with plant procedures. Prior to filling any container, tank levels are verified by electronic high-level and low-level annunciators, visual sight glasses, or are otherwise verified as described in the plant SPCC Plan. Page 8 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 The plant contains diesel fuel piping primarily associated with the delivery of diesel fuel from the two 110,000 gallon aboveground diesel fuel storage tanks to the emergency diesel generator system, and to other locations and systems. The piping is located aboveground or within concrete trenches. None of this piping is in contact with the soil. Portions of this piping are located within the secondary containment structure surrounding the tanks or at the fuel forwarding skid within the containment pad for the tanker unloading station. All aboveground piping outside of these concrete containments, and all piping within the concrete trenches, is provided secondary containment by open drains to the Oil/Water Separator. Diesel fuel transfer operations from the tanks to the emergency diesel generator system is an automated process. Facility operations personnel conduct daily routine facility walk -downs to observe all aboveground piping, valves, expansion joints, flange joints, and structural supports. There are no changes warranted to reduce the potential for impacts to storm water runoff associated with diesel fuel and gasoline storage practices or tanker unloading operations at the facility. All diesel fuel and gasoline containers are in compliance with the plant SPCC Plan. USED OIL STORAGE AND HANDLING Used oil is collected and stored in eleven small tanks and containers at the plant. The largest used oil tanks are one 4,000 gallon steel tank and one 2,000 steel gallon tank in the Mobile Equipment Area. These two tanks are within a common concrete containment structure. There is a 1,000 gallon steel used oil tank adjacent to the Oil/Water Separator that collects used oil removed by the separator. This tank is within the same concrete containment pad as the separator. There is a 1,000 gallon steel used oil tank adjacent to the Emergency Diesel Generator Building and within a concrete containment structure. There are three 220 gallon poly used oil containers at the plant. Two of these containers are within a common metal containment bin on a covered concrete pad at the Paint Shop. The remaining container is within a concrete containment structure in the Mobile Equipment Area. The plant has a 1,000 gallon steel used oil tank mounted on a mobile trailer. While in standby mode the trailer is maintained in an area of the plant with yard drains that discharge into the Oil/Water Separator. There is a 100 gallon hydrogen seal oil drain tank within a concrete containment structure adjacent to the Turbine Building, and a 200 gallon oil filter drain tank inside the Mobile Equipment Building. The plant also maintains two 55 gallon used cooking oil drums maintained within a poly containment shelter at the east end of the Service Building. A complete listing of all used oil tanks, including inspection and testing requirements, secondary containment descriptions and inspection requirements, and tanker loading operation requirements are described in detail in the Harris Nuclear Plant SPCC Plan. All external containments are inspected and manually drained in accordance with the SPCC Plan. Secondary containments either drain into the plant 10,000 gallon capacity Oil/Water Separator, or onto the plant yard. Mobile tanks are stored in areas that drain to the Oil/Water Separator while in standby mode. Tanker trucks are brought on -site to load used oil as needed from the Page 9 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 various used oil tanks. The tanker loading operations are conducted adjacent to the containers and in constant attendance in accordance with plant procedures. There are no changes warranted to reduce the potential for impacts to storm water runoff associated with used oil storage practices or tanker loading operations at the facility. All used oil containers are in compliance with the plant SPCC Plan. LUBE OIL STORAGE The plant has three lube oil storage tanks consisting of one 14,000 gallon Turbine Generator Batch Oil Tank and two 1,500 gallon Turbine Lube Oil Sump Tanks. All three tanks are located within concrete containment basins inside the Turbine Building. The inspection and testing requirements for these lube oil tanks is described in detail in the Harris Nuclear Plant SPCC Plan. There are no changes warranted to reduce the potential for impacts to storm water runoff associated with these lube oil tanks. OIL -FILLED EQUIPMENT AND SYSTEMS Oil -filled equipment and systems at the plant includes lubrication oils, mineral oils and hydraulic oils maintained within closed conduit systems. These oils are used in hydraulic systems, lubricating systems, gear boxes, machining coolant systems, heat transfer systems, transformers and circuit breakers. Oil -filled equipment and systems, including container inspection requirements and secondary containment descriptions and inspection requirements, are described in detail in the Harris Nuclear Plant SPCC Plan. The plant contains four lube oil and hydraulic oil reservoir systems located inside the Turbine Building. These reservoir systems are not exposed to storm water. Any oil release occurring from these systems will enter open floor drains that discharge into the plant Oil/Water Separator. The largest oil -filled equipment containers exposed to storm water are large transformers containing mineral oil and located in the Transformer Yard on the east side of the Turbine Building. This equipment consists of three 9,180 gallon Start -Up Transformers, four 7,780 gallon Main Step -Up Transformers, and two 5,500 gallon Auxiliary Transformers. All of these transformers are within a concrete containment sump equipped with a manually operated dewatering pump. Containment contents are inspected in accordance with the plant SPCC Plan prior to dewatering, and sump contents are pumped to the plant Oil/Water Separator. There are no changes warranted to reduce the potential for impacts to storm water runoff associated with the large transformers. Smaller oil -filled equipment containers exposed to storm water include numerous pad -mounted service transformers containing mineral oil located at various locations around the plant. These Page 10 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 transformers are used to provide power to the various buildings and facilities at the plant, and are generally not provided with any means of passive secondary containment. Any mineral oil release occurring from these service transformers would result in failure of the unit and subsequent loss of power. The plant relies on system monitoring, frequent inspections, preventative maintenance, and active containment measures as described in the plant SPCC Plan to contain any potential release occurring from these transformers. A mineral oil release from these units will typically discharge vertically into the underlying conduit penetrations which will provide some degree of containment. The potential for storm water impacts associated with mineral oil releases from any of these uncontained pad -mounted transformers is minimal, and could be reduced by the installation of dedicated secondary containments with manually operated drain valves or open drains to the Oil/Water Separator. CHEMICAL STORAGE AND HANDLING Various chemicals are used at the plant for water treatment and other purposes. Bulk chemicals are delivered by tanker trucks and unloaded into respective storage tanks at designated locations. Smaller chemical containers and drums are delivered to the receiving area of Warehouse 9 for storage or subsequent transport via company vehicles to the Water Treatment Building, Paint Shop, Bulk Warehouse, Chemical Warehouse, the Sewage Treatment Plant, and other locations. Plant personnel are trained in safe forklift usage, safe handling of chemicals, and proper use of spill containment and cleanup materials. Spill kits are located at receiving areas. Two 5,500 gallon sodium hypochlorite tanks, one 5,600 gallon phosphoric acid tank, three 4,500 gallon water treatment chemical storage tanks and other smaller chemical containers are used for water treatment and analysis purposes at the Cooling Tower. The sodium hypochlorite tank and other small tanks and containers are within a concrete containment. The containment can be drained to the yard drainage system or can be pumped into the Cooling Tower basin. Small containers of chemicals used for analysis are stored inside the chemical storage building. Four bulk chemical storage tanks, consisting of a 10,800 gallon caustic tank, a 7,500 gallon sulfuric acid tank, a 1,500 gallon empty ammonia tank, and a liquid nitrogen to gaseous nitrogen tank are located at the south end of the Turbine Building. These tanks are within containments that can be drained to the yard drainage system or to a sump that discharges to the Oil/Water Separator. An 8,315 gallon sulfuric acid storage tank is located at the east end of the Water Treatment Building. This tank is within a concrete containment with an open drain to a sump that pumps to the Neutralization Basin. Sodium carbonate, sodium hypochlorite, sodium hydroxide, and water treatment polymers are stored in tanks and containers at the Sewage Treatment Plant. Some of these tanks and containers are stored in totes inside metal buildings with built-in sumps. All chemical storage tanks and containers are provided with some means of containment consisting of secondary containment structures with manually operated drain valves, secondary Page 11 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 containment structures with open drains to other containment or treatment systems, or are stored inside buildings. All external containments with drain valves are inspected prior to being manually draining. All chemical deliveries are conducted adjacent to the containers or at receiving areas in constant attendance and in accordance with plant procedures. Chemical container levels are verified prior to initiating any tanker unloading operation. There are no changes warranted to reduce the potential for impacts to storm water runoff associated with the storage and handling of chemicals. WASTE HANDLING AND STORAGE Waste chemicals and oils produced inside the protected area of the plant is typically transported to and processed in the chemical processing area of the Paint Shop. These materials are stored within a covered concrete containment area with open drains to the Oil/Water Separator. Waste chemicals produced outside the protected area of the plant are typically transported to, processed and stored in Warehouse 6. Waste oils produced outside the protected area of the plant are typically transported to the used oil tanks in the Mobile Equipment Area. Hazardous materials are accumulated in designated satellite waste storage areas at the plant. All satellite accumulation areas are either under shelters or are inside buildings. All hazardous waste generated at the plant is eventually transported to and stored in the Central Hazardous Waste Storage Area located under a shelter attached to the Chemical Warehouse. Dumpsters and roll -off containers are used at certain locations to collect inert materials and solid waste for disposal. No liquids or other materials that could potentially impact storm water are disposed of in external dumpsters. Two closed trash compactors are located west of the Chemical Warehouse. Recyclable waste materials are collected in covered storage containers at several locations inside buildings. There are no changes warranted to reduce the potential for impacts to storm water runoff associated with waste handling and storage. EXTERNAL STORAGE, LAYDOWN AND PARKING AREAS Inert materials such as miscellaneous wood, structural steel, cable, empty drums and other metal components are stored at various external laydown yard areas at the plant. These laydown areas are typically paved or gravel -surfaced. No liquids or materials that could potentially impact storm water are stored on external laydown areas. Cranes and other mobile equipment are parked on the crane laydown yard and in other external parking and storage areas. This equipment can contain oils, fuels, hydraulic fluids and other materials that represent potential storm water impacts. Plant employees are trained to promptly report and respond to spills. Page 12 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Other materials such as soil, sand, gravel, compost, concrete and asphalt may be stockpiled at certain locations on a temporary basis until the material can be recycled, reused or properly disposed of off -site. Stockpiled materials such as soil that could potentially result in the mobilization of sediments when exposed to rainfall are covered, stabilized by temporary or permanent seeding or are otherwise provided with necessary sediment control measures. Drainage areas containing external storage, laydown and parking areas are described in Appendix B. The potential for storm water impacts associated with these external areas could be reduced by covering materials such as soil, gravel, treated lumber, flaking painted surfaces and other materials that represent the greatest potential for such impacts, by regular inspections and maintenance of mobile equipment, and by maintaining mobile equipment inside temporary containments while parked. Constructing permanent shelters over these external areas to prevent contact with storm water is cost prohibitive. SECURITY TRAINING AND FIRING RANGE The plant maintains a designated facility for security training purposes that includes an external firing range. The range is located west of the plant on the north side of the Emergency Service Water Intake Canal. Lead -based ammunition is routinely fired into bullet traps at the range. Storm water runoff from this area flows south and southwest overland into the adjoining Emergency Service Water Intake Canal. The embankment soil pH is routinely monitored and maintained within a range to prevent the lead from becoming soluble. Security personnel maintain an inventory of expended rounds fired and routinely harvesting lead from bullet traps or the soil. There are no changes warranted to reduce the potential for impacts to storm water runoff associated with the security training and firing range. Constructing permanent shelters over the firing range to eliminate exposure to rainfall is cost prohibitive. Duke Energy continuously pursues strategies to holistically manage the exposure of storm water to power generation, waste disposal, and facility management operations. These efforts consider the technical and economic feasibility of changing the methods of operations and/or storage practices. The details from the planning, design, and construction of such improvements shall be incorporated into the SWPPP upon completion. Page 13 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 2.2.2 Secondary Containment Requirements and Records NPDES Permit Reference: Part 1, Section A 21.2b(2) The plant manages numerous oil -based liquids and non -oil based liquids and chemicals which are critical to power generation and transmission, water treatment, waste handling and treatment, and operation of vehicles and equipment. The Harris Nuclear Plant is subject to the requirements of U.S. Environmental Protection Agency (EPA) Oil Pollution Prevention Regulation 40 CFR Part 112 because the oil storage capacity at the facility exceeds 1,320 gallons and the proximity to waters of the United States. As a result, the facility maintains a Spill Prevention, Control, and Countermeasures (SPCC) Plan pursuant to, 40 CFR Part 112. This plan addresses secondary containment, inspections and record keeping requirements for all oil containers of 55 gallon capacity and greater. A copy of the SPCC is not included in the SWPPP as the document is actively managed at all times for evolving site conditions; however, a current version is maintained in the Nuclear Fusion document data base and a version with mark-ups is maintained in the office of the Site Environmental Coordinator(s) and referenced herein. Pursuant to this section of the permit, secondary containment is required for the bulk storage of liquid materials, storage in any amount of Section 313 of Title III of the Superfund Amendments and Reauthorization Act (SARA) water priority chemicals, and storage in any amount of hazardous substances, in order to prevent spills and leaks from contaminating storm water runoff. Secondary containments shall be sized to contain the full capacity of the single largest container within the containment structure. Secondary containments exposed to precipitation shall also have additional capacity to contain the 25-year, 24-hour storm event. This additional capacity requirement shall take into consideration any storm water runoff entering the containment structure from upland areas if applicable. Secondary containments draining into storm water conveyance systems or onto the ground surface shall be equipped with manually - operated, lockable or otherwise secured drain valves or dewatering pumps. Flapper -type valves shall not be used. Accumulated storm water within secondary containments shall be visually inspected for color, foam, outfall staining, presence of sheen, oils or chemicals prior to release in accordance with the frequencies specified in the plant SPCC Plan. Inspections will include observation for leaks, condition of containment, valve drain closure and locking, and presence of excessive debris and sediment. Inspection records shall be maintained at the facility. Exterior containments exposed to precipitation shall be inspected promptly after any significant rainfall event, and collected water within containments shall be drained to maintain adequate spill storage capacity within the containment. A list of all liquids and chemicals and their associated secondary containment provisions are provided in Appendix F. Documentation for periodic inspections for leaks and recordation of accumulated storm water releases shall be placed in Appendix I. Page 14 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 2.2.3 Best Management Practices (BMPs) Summary NPDES Permit Reference: Part 1, Section A 21.2b(3) A number of best management practices are currently in place at the station. These BMPs were instituted over a number of years as a result of various regulatory drivers and good housekeeping objectives. While a chosen practice provides some level of pollution prevention as it relates to the management of storm water discharges under this permit, the historic rationale behind implementing such a practice is comprehensive of a number of contributing factors. To document the ongoing implementation of these practices as part of the SWPPP, Table 2 from the Industrial Storm Water Fact Sheet for Steam Electric Power Generating Facilities (EPA-833-F-06-030) was reviewed and evaluated, and is provided in Appendix O. A high-level review of the BMPs is provided below along with a rationale for implementation. The detailed listing of these BMPs for each drainage area is provided in the outfall descriptions in Appendix B where information regarding the industrial activities and significant sources of pollutants are also compiled. The compiled information in the appendix captures an ongoing assessment process for BMP selection and implementation. The Site Environmental Coordinator(s) shall rely on Table 2 from EPA-833-F-06-030 for the improvement, installation and implementation of BMPs to address data collected through monitoring of storm water discharges. The Site Environmental Coordinator(s) may also rely on other sources of information to develop and implement appropriate BMPs not specifically listed in Table 2. This list of BMPs shall be reviewed and updated annually as new practices are incorporated in the plan or warranted as a result of exceedances of analytical monitoring benchmarks detailed in the permit. FUGITIVE DUST EMISSIONS The potential for fugitive dust to impact storm water runoff drives the need for emission management practices. The station maintains an air permit with NCDEQ that includes the control of fugitive dust emissions as a programmatic requirement. Fugitive dust emissions are managed as necessary through a variety of BMPs that include restricting frequent traffic to paved roadways, periodic wetting of haul roads, and permanent stabilization of dust generating surfaces. Fugitive dust control is typically a contractual requirement of any contractors brought on -site to perform services that may involve the creation of fugitive dust. Fugitive dust generation is typically insignificant at the facility. LOADING AND UNLOADING OF FUELS, OILS AND NON -OIL LIQUIDS AND CHEMICALS The plant maintains numerous locations for the loading and unloading of fuels, oils and non -oil liquids and chemicals. The potential for spills and leaks to release to storm drains or overland drainage pathways to receiving waters presents a source of unauthorized discharges and potential storm water contamination. Loading and unloading operations follow plant procedures, the requirements specified in the plant SPCC Plan, and the requirements specified in the DOT unloading/loading procedures 49 CFR Part 177, Subpart B. Page 15 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 BMPs utilized during loading and unloading operations include constant attendance by qualified plant personnel, appropriate training, verification of container levels prior to filling, and the close proximity of appropriate spill response materials and resources. BMPs also include dedicated containment platforms for tanker unloading of diesel fuel into the two 175,000 gallon underground diesel fuel storage tanks and into the two 110,000 gallon field -erected aboveground diesel fuel storage tanks. Lined concrete containments are utilized for unloading of high usage chemicals. Temporary containments are used for the unloading and delivery of other fuels and chemicals. ABOVEGROUND LIQUID STORAGE TANKS AND PIPING The plant maintains numerous aboveground storage tanks for fuels, oils and non -oil liquids and chemicals. Aboveground piping is present at certain locations, and is primarily associated with the transfer of diesel fuel for operation of emergency diesel generators and other equipment. The potential for spills and leaks to release to storm drains or overland drainage pathways to receiving waters exists, and presents a source for an unauthorized discharge and contamination of storm water. The plant relies on a variety of BMPs to reduce the potential for leaks or spills to impact storm water. BMPs utilized for the larger bulk storage tanks include either dedicated secondary containments with secured, manually -operated drain valves or pumps, dedicated secondary containments equipped with open drains to the Oil/Water Separator. BMPs utilized for smaller containers and drums include maintaining the containers inside various buildings, on spill pallets or within containment shelters. BMPs utilized for aboveground piping includes concrete containments and open drains that discharge into the Oil/Water Separator. Additional BMPs utilized include bollards and barriers to prevent vehicular impacts, tank level indicators to prevent overfilling and detect leaks, routine inspections and maintenance of tanks, piping, valves and connections. Routine inspection and integrity testing requirements for bulk oil tanks are specified in the plant SPCC Plan. OIL -FILLED EQUIPMENT AND SYSTEMS The plant maintains oil -filled electrical equipment at numerous locations. The potential for spills and leaks to release to storm drains or overland drainage pathways to receiving waters exists, and presents a source for an unauthorized discharge and contamination of storm water. The plant relies on a variety of BMPs to reduce the potential for leaks or spills from this equipment to impact storm water. The plant utilizes a concrete containment sump equipped with a manually operated dewatering pump for the large transformers in the Transformer Yard on the east side of the Turbine Building. Containment contents are inspected in accordance with the plant SPCC Plan prior to dewatering, and sump contents are pumped to the plant Oil/Water Separator. BMPs utilized for the numerous uncontained pad -mounted service transformers at the plant includes system monitoring to detect any adverse conditions associated with the equipment, daily rounds, and routine inspections performed in accordance with the requirements specified in the plant SPCC Plan. Page 16 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 WASTE HANDLING AND STORAGE Waste chemicals, used oils and waste products are produced, handled, processed and characterized at various locations at the plant. Wastes produced inside the protected area of the plant is typically transported to and processed in the chemical processing area of the Paint Shop. Waste chemicals produced outside the protected area of the plant are typically transported to, processed and stored in and near Warehouse 6. Waste oils produced outside the protected area of the plant are typically transported to the used oil tanks in the Mobile Equipment Area. Hazardous materials are accumulated in designated satellite waste storage areas at the plant, and all hazardous waste generated at the plant is eventually transported to and stored in the Central Hazardous Waste Storage Area at the Chemical Warehouse and at Warehouse 6. Dumpsters and roll -off containers are used at certain locations to collect inert materials and solid waste for disposal. Recyclable waste materials are collected in covered storage containers at several locations inside buildings. The potential for spills and leaks from waste materials to release to storm drains or overland drainage pathways to receiving waters exists, and presents a source for an unauthorized discharge and contamination of storm water. The plant relies on a variety of BMPs to reduce the potential for impacts to storm water associated with waste handling and storage. BMPs utilized include maintaining all satellite accumulation areas under shelters or inside buildings, storing waste materials at the Paint Shop within a covered concrete containment area with open drains to the Oil/Water Separator, and storing hazardous wastes under shelter at the Central Hazardous Waste Storage Area. BMPs utilized for trash collection include disallowing the disposal of liquids or other materials that could potentially impact storm water in dumpsters and roll -off containers, and maintaining dumpsters closed. EXTERNAL STORAGE, LAYDOWN AND PARKING AREAS Inert materials such as miscellaneous wood, structural steel, cable, empty drums and other metal components are stored at various external laydown yard areas at the plant. Cranes and other mobile equipment are parked on the crane laydown yard and in other external parking and storage areas. Other materials such as soil, sand, gravel, compost, concrete and asphalt may be stockpiled at certain locations on a temporary basis until the material can be recycled, reused or properly disposed of off -site. The potential for impacts to storm drains or overland drainage pathways to receiving waters exists, and presents a source for an unauthorized discharge and contamination of storm water. The plant relies on a variety of BMPs to reduce the potential for impacts to storm water from these external areas. BMPs utilized include disallowing the storage or disposal of liquids or other materials in external areas, stabilizing and/or covering of stockpiled soils and other materials that could be mobilized by storm water, frequent inspections of these areas, and prompt reporting and response to spills. Page 17 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 VEHICLE AND EQUIPMENT MAINTENANCE The plant maintains a garage facility for maintenance of plant vehicles and equipment located southeast of the Chemical Warehouse outside of the protected area. Vehicles and equipment have the potential to leak or spill fuel, hydraulic fluids and oils if not properly maintained. Maintenance is performed on a routine basis to keep vehicles and equipment in good operational condition to reduce the potential for spills and leaks. Some maintenance may be performed offsite at licensed commercial facilities. BMPs utilized include performing all maintenance inside the Garage, utilizing temporary containments for the capture of fluids, and proper labeling, handling and disposal of used materials, parts and fluids. BMPs also include readily available spill response materials. Storm water runoff from the Garage and surrounding area enters a drainage channel that flows southeasterly, eventually into the Intake Canal. SECURITY TRAINING AND FIRING RANGE The plant maintains a designated facility for security training purposes that includes an external firing range. Lead -based ammunition is routinely fired into earthen embankments at the range. The potential for mobilization of sediments containing lead exists, and presents a source for an unauthorized discharge and contamination of storm water. Storm water runoff from this area flows overland into the Emergency Service Water Intake Canal. BMPs utilized include tracking the amount of ammunition fired into the embankments, routine monitoring and adjustment of soil pH levels to prevent the lead from becoming soluble, and routine harvesting of lead from the soil per EPA guidance for firing range BMPs. A list of all currently utilized BMPs within the contributing drainage area for each storm water outfall is provided on the fact sheets in Appendix B. 2.3 Spill Prevention and Response Procedure NPDES Permit Reference: Part 1, Section A 21.2c The station maintains a storm water compliance program to control and minimize contamination of storm water resulting from spills and exposure to materials associated with facility operations. This procedure incorporates an assessment of potential pollutant sources based on a materials inventory of the plant. The materials inventory is primarily compiled and maintained through two efforts; first for development and compliance with the plant SPCC Plan, and secondly for the management of hazardous materials. The Harris Nuclear Plant is required to develop and maintain an SPCC Plan in accordance with 40 CFR Part 112 because the oil storage capacity at the facility exceeds 1,320 gallons and the proximity to waters of the United States. The SPCC Plan provides an assessment of spill potential, measures for spill prevention, and a spill response protocol for oil -based liquids. A similar approach has been adopted for non -oil based liquids and chemicals representing the balance of materials at the plant. However, the plant will likely maintain the same general spill response protocol from the SPCC Plan regardless of the types of materials except where Page 18 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 hazardous materials regulations and notifications deviate from SPCC requirements. This is recognized in the response procedures. The Site Environmental Coordinator(s) use included maps for all oils, liquids, chemicals and materials that have the potential to impact storm water. The Site Environmental Coordinator(s) shall routinely review site procedures and practices for applicability with current plant operations and practices, shall amend/update requirements as necessary, and shall communicate changes to responsible plant personnel. A responsible person shall be on -site at all times during facility operations that have increased potential to contaminate storm water runoff through spills or exposure of materials associated with facility operations. The plant maintains an Emergency Response Organization (ERO) consisting of personnel from all areas of the plant. In the event of an incident, the on -duty Operations Shift Manager (OSM), or other qualified Operations response persons, will assume responsibility as the Emergency Coordinator. The Emergency Coordinator is responsible for contacting appropriate emergency response personnel, the SPCC Coordinator, and the Hazmat Team. The Emergency Coordinator will also assume responsibility as the Incident Commander until such time that the Hazmat Team mobilizes to the incident. The on -site Fire Brigade Team is also trained in spill response. Spill Prevention and Response Procedures at the Harris Nuclear Plant are listed in Appendix G. 2.4 Preventative Maintenance and Good Housekeeping Program NPDES Permit Reference: Part 1, Section A 21.2d Plant personnel perform a number of various inspections and tasks for operational and regulatory purposes that constitute a Preventative Maintenance and Good Housekeeping Program. These efforts cover plant areas such as the Reactor, Turbine, and Diesel Generator Buildings and surrounding support facilities, tanks and equipment within and outside the protected area; waste handling and storage areas, water and wastewater treatment areas, the Security Training Facility, and external laydown, storage and parking areas. In accordance with the permit, the preventative maintenance and good housekeeping program shall include all features of the storm water drainage system at the facility. The Site Environmental Coordinator(s) shall ensure the Preventative Maintenance and Good Housekeeping Program is being implemented either through self -performance or review of delegated tasks. The Site Environmental Coordinator(s) shall record compliance of the program either through reference to actively managed reporting, such as documentation required to demonstrate compliance with the SPCC Plan, documentation required to demonstrate compliance with an approved erosion and sediment control permit, or by documentation specific to the SWPPP. The Site Environmental Coordinator(s) shall routinely evaluate the applicability of tasks as it relates to analytical and qualitative monitoring to determine if the preventative maintenance and good housekeeping program is adequate and performed frequently enough to control and minimize exposure to rainfall and storm water runoff. These inspections and tasks Page 19 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 can be collectively managed through E-Track and CAS to ensure they are performed and documented. A summary of the facility Preventative Maintenance and Good Housekeeping Program is provided in Appendix H. Duplicate documentation from other actively managed reporting and specific SWPPP documentation shall be maintained in Appendix H. 2.5 Facility Inspections NPDES Permit Reference: Part 1, Section A 21.2h Comprehensive inspections of the facility, including all storm water conveyance systems, shall be performed at a minimum of twice a year, once during the first half of the year (January to June), and once during the second half (July to December), with at least 60 days separating inspection dates (unless performed more frequently than semi-annually). These inspections are different from, and in addition to, the storm water discharge characteristic monitoring at outfalls described in Section 3.2. The Site Environmental Coordinator(s) shall ensure that inspection activities performed as part of the Preventative Maintenance and Good Housekeeping Program (Appendix H) or that may occur more frequently than semi-annually, sufficiently represent a comprehensive facility inspection. These inspections can be scheduled through E-Track to ensure they are performed and documented. Documentation for performance of the routine facility inspections is included in Appendix I. 2.6 Employee Training NPDES Permit Reference: Part 1, Section A 21.2e Training is conducted annually (at a minimum) for station personnel with responsibilities for spill response and cleanup, preventative maintenance activities, and plant operations that have the potential to contaminate storm water runoff. The training is conducted via online session and consists of a general understanding of storm water and its impacts on receiving waters with site specific information, and of the SPCC plan. Credit for completing the training is tracked electronically in lieu of gathering individual signatures. The Site Environmental Coordinator(s) shall maintain an annual summary of facility staff completing the training. The compilation of this information can be scheduled through E-Track to ensure it is performed and documented. Page 20 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 2.7 Responsible Party NPDES Permit Reference: Part 1, Section A 21.2f The Site Environmental Coordinator(s) shall be the primary responsible party for the overall coordination, development, review, amendment and implementation of the SWPPP. The Site Environmental Coordinator(s) may direct designees, including facility staff and contractors, to perform certain requirements of the permit, however, the Site Environmental Coordinator(s) maintains ultimately responsible for ensuring the completion and documentation of compliance tasks. The Site Environmental Coordinator(s) shall be the owner of all permit compliance tasks scheduled through E-Track. The Site Environmental Coordinator(s) is accountable to the Plant Management, and is supported by the Manager - Nuclear Environmental Field Support. 2.8 Storm Water Pollution Prevention Plan Amendment and Annual Update NPDES Permit Reference: Part 1, Section A 21.2g The Site Environmental Coordinator(s) shall be responsible for recording changes in design, construction, operation, site drainage, maintenance, or configuration of the physical features of the facility which have the potential to impact storm water. These changes shall be documented in Appendix K. Should changes occur at the facility that represent significant risks for storm water impacts, the Site Environmental Coordinator(s) shall immediately update the SWPPP and associated procedures, BMPs, forms, inspection requirements, and other documentation to support ongoing compliance and limit the potential for discharge of pollutants. Changes at the facility that do not represent significant risks for storm water impacts may be red -marked where warranted within the body of the plan. Examples of red -mark changes include revisions to responsible persons, contacts, phone numbers, procedure references, or improvements to BMPs. The Site Environmental Coordinator(s) shall review and update all aspects of the SWPPP on an annual basis. This review shall be performed and documented by May 15 of each year, and shall include the following: • Updating the list of significant spills and leaks in Appendix D for the past year in order to maintain a list of the previous three years, or notating that no spills have occurred in the past year consistent with Section 2.1.4. • Performing the non-stormwater discharge evaluation in Appendix E and resubmitting a certification of such effort consistent with Section 2.1.5. • Re-evaluating the effectiveness of the on -site storm water BMPs consistent with Section 2.2.3 and the Outfall Narrative Descriptions in Appendix B. Page 21 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 • Performing a review and comparison of any applicable sample analytical data to benchmark values over the past year including a discussion about any tiered response status. The annual Discharge Monitoring Report is provided in Appendix L. The compilation of this information can be scheduled through E-Track to ensure it is performed and documented by May 31. 2.9 Storm Water Pollution Prevention Plan Implementation NPDES Permit Reference: Part 1, Section A 21.2i Implementation of the SWPPP is documented through the compilation of information for all monitoring, measurements, inspections, maintenance activities, management activities, and training. The supporting forms, checklists, sampling logs, BMP record actions, and data results generated for these compliance activities is compiled and documented in the appendices of this SWPPP. Such documentation shall be kept on -site for a period of five years and made available to the NCDEQ Director or Director's authorized representative upon request. 3.0 Storm Water Monitoring NPDES Permit Reference: Part 1, Section A 21.3 The Site Environmental Coordinator(s) is responsible for assuring that all analytical and qualitative monitoring of storm water discharges is performed in accordance with the permit requirements. The Site Environmental Coordinator(s) shall maintain an onsite rain gauge for recordation of rainfall events for this purpose. 3.1 Analytical Monitoring Requirements NPDES Permit Reference: Part 1, Section A 21.1 No analytical monitoring of storm water is required. 3.2 Qualitative Monitoring Requirements NPDES Permit Reference: Part 1, Sections A 2 1. 1 and A 21.3b Qualitative monitoring is a visual inspection of discharging storm water which serves to evaluate the effectiveness of the SWPPP and to identify new potential sources of storm water pollution. Qualitative monitoring requirements are detailed in the Permit Section A 21.1. Representative outfall status is not applicable to qualitative monitoring. Qualitative monitoring shall be performed twice per year, once in the spring (April through June), and once in the fall (September through November). Qualitative monitoring does not need to be performed during a representative storm event. Page 22 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Key permit requirements for qualitative monitoring are: • Perform scheduled monitoring at all outfalls regardless of representative status. • Complete NCDEQ's storm discharge outfall qualitative monitoring report for each outfall. • Perform monitoring during measurable storm events. • If the monitoring results indicate that existing BMPs are ineffective or that significant contamination is present, the Site Environmental Coordinator(s) shall investigate potential causes, evaluate the feasibility of corrective actions, and implement those corrected actions within 30 days. NCDEQ's "Guidance for Rating Storm Water Discharge" and blank qualitative monitoring reports are provided in Appendix M. Completed qualitative monitoring reports shall be compiled and archived in an orderly fashion in Appendix M. Page 23 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix A Site Maps (NPDES Permit number NC0039586: Part 1, Section A 21.2.a(1) and (3)) Page 24 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 �+ Bill 11113 j ll . .. '4Ir, kwqkrma Page 25 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix 6 Storm Water Outfall and Drainage Area Summaries (NPDES Permit number NCO039586: Part 1, Section A 21.2.a(3)) Page 26 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 n a x � G ��s os�4 s rtN G R 9 p d a �3 yO v w DRAINAGE AREAS MAP = I I HARRS NUCLEAR PLANT HIM 5413 S H EARO N HARRIS ROAD NEW HL.L NORTH CAROLINA27562 Page 27 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Page 28 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Page 29 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Gym w%F STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 2. � C 7 rp "{ O m 0. ro %UTHWE5T HARMS MIXiEAR PLANT 54 12 SHEA70N AARRIS ROAD NEW NA.L. NORTH CAMOLINA 27562 Page 31 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 S7 T 0 0 A'_ l��n l is 5, I. r }� `? Y L 3 ✓✓ Y X" tr: 5Oi]TH W E$T HA RR15 liXiEAA PLANT +, 5 o 5 412SH@A1i7NHAMSROAL \ NEW HILL NORTH CAROLINA 27562 � Page 32 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Page 33 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Page 34 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Page 35 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 *41 1ir 0 g = III Ig III 0 Page 36 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 1 - Storm Water Outfall SW001 Conveyance 36 inch Reinforced Concrete Pipe Coordinates N 350 38' 17" W 780 57' 02" Drainage Area 66 acres % Impervious 40 % Drainage Area Description: Drainage Area 1 includes Warehouses Nos. 6 and 9, paved and gravel -surfaced parking areas, gravel -surfaced storage yards, rail lines, service transformers, scrap metal and solid waste dumpsters, four sewage lift stations, and grassed yard areas. Storm water runoff from this drainage area discharges to the east into Harris Reservoir north of causeway. Industrial Activities: Warehouses Nos. 6 and 9 receive, handle and ship various quantities of chemicals, used oils, and other potential storm water pollutants in totes, drums and bags. Miscellaneous wood, structural steel, cable, empty drums and other metal components are stored on the gravel - surfaced storage yards. Scrap metal and solid waste is collected in the dumpsters. Service transformers provide power to the two warehouses. The sewage lift stations pump raw sewage to the Wastewater Treatment Plant. Employee personal vehicles, company vehicles and freight trucks park on the paved and gravel -surfaced parking areas. Significant Materials and Potential Pollutants: Warehouses Nos. 6 and 9: Chemicals, used oils, and other potential storm water pollutants in totes, mineral oil in service transformers, scrap metal and solid waste in the dumpsters. Storage areas: Miscellaneous wood, structural steel, cable, and other metal. Sewage lift stations: Raw sewage overflow. Parking areas: Oils, gasoline and diesel fuel. BMP Summary: Warehouses Nos. 6 and 9: • Plant procedures are followed regarding storage and handling of all chemicals and materials. • Service transformers are inspected daily. • No liquids or potential storm water pollutants are disposed of in the scrap metal and solid waste dumpsters, and the dumpsters are kept covered. • Warehouse personnel are trained in safe forklift usage, spill containment, and cleanup of oil and chemicals. • Spill kits are located at receiving areas. Sewage lift stations: • Stations are inspected per Operations and Chemistry rounds. Storage areas: • No materials that could impact storm water are stored in exterior areas. Parking areas: • Employees are trained to promptly report and respond to spills. Page 37 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 2 - Storm Water Outfall SW002 Conveyance 36 inch Reinforced Concrete Pipe Coordinates N 350 38' 09" W 780 57' 00" Drainage Area 14 acres % Impervious 15 % Drainage Area Description: Drainage Area 2 includes the Diesel Generator Building, the northern portion of the Cooling Tower, the Major Projects Building, one 6,500 gallon phosphoric acid tank and three 4,500 gallon water treatment chemical tanks, a service transformer, a sewage lift station, gravel - surfaced parking areas, rail lines, and grassed yard areas. Storm water runoff from this drainage area discharges to the east into Harris Reservoir north of causeway. Industrial Activities: The Cooling Tower cools plant process water for reuse. The normal service water pumps are located on the west side of the Cooling Tower and deliver makeup water to the Cooling Tower basin. The chemical storage tanks are filled by tanker trucks. Diesel fuel is delivered via aboveground piping to the Diesel Generator Building. The service transformer provides power to the Cooling Tower and other buildings. The sewage lift station pumps raw sewage to the Wastewater Treatment Plant. Employee personal vehicles and company vehicles park on the gravel -surfaced parking areas. Significant Materials and Potential Pollutants: Cooling Tower: Lube oil in the normal service water pumps, cooling water spray and drift, chemical storage tanks. Diesel Generator Building: Diesel fuel. Service transformer: Mineral oil. Sewage lift station: Raw sewage overflow. Parking areas: Oils, gasoline and diesel fuel. BMP Summary: Cooling Tower: • Cooling water spray and drift is a condition of the plant NPDES permit. • Normal service water pumps are routinely inspected for condition and proper operation. Diesel Generator Building: • Piping, valves and fittings are inspected daily. • Piping is located in trenches with drains to the plant oil/water separator. Phosphoric acid tank and water treatment chemical tanks: • Tanks are located within concrete containments • Plant procedures are followed regarding delivery and handling of all chemicals. Service transformer: • Transformer is inspected daily. Sewage lift station: • Station is inspected per Operation and Chemistry rounds. Parking areas: • Employees are trained to promptly report and respond to spills. Page 38 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 3 - Storm Water Outfall SW003 Conveyance 48 inch Reinforced Concrete Pipe Coordinates N 350 38' 04" W 780 56' 57" Drainage Area 15 acres % Impervious 75 % Drainage Area Description: Drainage Area 3 includes the southern portion of the Cooling Tower, a 5,600 gallon sodium hypochlorite tank and other smaller water treatment chemical storage tanks, a chemical storage building, Cooling Tower circulating water pumps, the Transformer Yard adjacent to the Turbine Building, paved parking areas, and grassed yard areas. Storm water runoff from this drainage area discharges to the east into Harris Reservoir just north of causeway. Industrial Activities: The Cooling Tower cools plant process water for reuse. Cooling Tower inflowing water is treated with sodium hypochlorite and other approved water treatment chemicals from tanks at the Cooling Tower, and chemicals for sampling and analysis are stored inside the Chemical Storage Building. Chemicals are delivered by tanker truck. Circulating water pumps are located on the south side of the Cooling Tower and are used to maintain process water circulation. Nine large transformers are located in the Transformer Yard. Employee personal vehicles and company vehicles park on the paved parking areas. Significant Materials and Potential Pollutants: Cooling Tower: Chlorine, acid, sodium hypochlorite, trilite, ammonium bisulfate, and detergents in tanks, chemicals for sampling and analysis inside the chemical storage building. cooling water spray and drift, lube oil in the circulating water pumps. Transformer Yard: Mineral oil in transformers. Parking areas: Oils, gasoline and diesel fuel. BMP Summary: Cooling Tower: • The 5,600 gallon sodium hypochlorite tank and other small tanks are within a concrete containment. Sampling and analysis chemicals are stored inside the chemical storage building. • Plant procedures are followed regarding delivery and handling of all chemicals. • Cooling water spray and drift is a condition of the plant NPDES permit. • Circulating water pumps are routinely inspected for condition and proper operation. Transformer Yard: • Transformers are located within concrete containment sumps with manually operated dewatering pumps that discharge into the plant oil/water separator. • Transformers and containments are inspected daily. Parking areas: • Employees are trained to promptly report and respond to spills. Page 39 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 4 - Storm Water Outfall SW004 Conveyance Riprap ditch Coordinates N 350 37' 52" W 780 56' 52" Drainage Area 33 acres % Impervious 5 % Drainage Area Description: Drainage Area 4 includes the plant gravel -surfaced Switchyard, paved roads and parking areas, and grassed yard areas. Storm water runoff from this drainage area discharges to the east into Harris Reservoir south of causeway. Industrial Activities: The Switchyard contains electrical equipment and batteries. Employee personal vehicles, company vehicles and freight trucks park on the paved parking areas. Significant Materials and Potential Pollutants: Switchyard: Mineral oil in electrical equipment, acid electrolyte solution in batteries. Parking areas: Oils, gasoline and diesel fuel. BMP Summary: Switchyard: • Switchyard equipment is inspected daily. Parking areas: • Employees are trained to promptly report and respond to spills. Page 40 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 5 - Storm Water Outfall SW005 Conveyance 42 inch and 60 inch Reinforced Concrete Pipe Coordinates N 350 37' 47" W 780 57' 11" Drainage Area 12 acres % Impervious 95 % Drainage Area Description: Drainage Area 5 includes the Administration Building, the Security Building, a portion of the Service Building, a portion of the Bulk Warehouse, four chemical storage tanks adjacent to the Turbine Building (one 10,800 gallon caustic tank, one 4,500 gallon sulfuric acid tank, one 1,500 gallon ammonia tank, and one liquid nitrogen tank), a sewage lift station, one aboveground and one underground diesel fuel storage tanks at the Security Building, a cooking grease storage shelter at the Service Building, paved roads and parking areas. Most of this drainage area is impervious roofs and paved areas. Storm water runoff from this drainage area discharges to the south into the Make -Up Water Intake Canal. Industrial Activities: The Bulk Warehouse receives and handles various quantities of chemicals and other potential storm water pollutants. Various chemicals are delivered by tanker truck to the chemical storage tanks adjacent to the Turbine Building. Diesel fuel is unloaded from tanker trucks into the two tanks at the Security Building. Cooking grease is loaded into trucks for disposal. Service transformers provide power to the Administration Building and Security Building. The sewage lift station pumps raw sewage to the Wastewater Treatment Plant. HVAC units are located on the Security Building roof. Employee personal vehicles and company vehicles park on the paved parking areas. Significant Materials and Potential Pollutants: Chemical storage tanks: Liquid nitrogen, ammonia, sodium hydroxide, sulfuric acid. Security Building: Diesel fuel, leaks from the HVAC unit on the roof. Service transformers: Mineral oil. Service Building: Cooking grease. Bulk Warehouse: Various chemicals and other potential storm water pollutants. Sewage lift station: Raw sewage overflow. Storage areas: Miscellaneous wood, structural steel, cable, and other metal. Parking areas: Oils, gasoline and diesel fuel. BMP Summary: Chemical storage tanks: • Tanks are within a concrete containment. • Plant procedures are followed regarding delivery and handling of chemicals. Security Building: • The aboveground diesel fuel tank is located inside the building. • Plant procedures are followed regarding delivery of diesel fuel. • HVAC unit is routinely serviced. Service transformers: • Transformers are inspected daily. Page 41 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Service Building: • Cooking grease containers are maintained inside a plastic containment shelter. Bulk Warehouse: • Plant procedures are followed regarding storage and handling of all oils, chemicals and materials. • Warehouse personnel are trained in spill containment and cleanup. Spill kits are located at receiving areas. Sewage lift station: • Station is inspected per Operation and Chemistry rounds. Storage Areas: • No materials that could impact storm water are stored in exterior areas. Parking areas: • Employees are trained to promptly report and respond to spills. Page 42 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 6 - Storm Water Outfall SW006 Conveyance 42 inch Reinforced Concrete Pipe Coordinates N 350 37' 38" W 780 57' 13" Drainage Area 26 acres % Impervious 65 % Drainage Area Description: Drainage Area 6 includes the Water Treatment Building, the Paint Shop, the Chemical Warehouse, the Mobile Equipment Area, a portion of the Service Building, a portion of the Bulk Warehouse, the Neutralization Basin, the Settling Basin, small gasoline, diesel fuel and used oil storage tanks at various locations, the Oil/Water Separator and adjacent 1,000 gallon used oil collection tank, service transformers, three sewage lift stations, an 8,315 gallon sulfuric acid storage tank, a solid waste compactor, paved roads, gravel -surfaced areas, external storage areas, parking areas, and grassed areas. Certain yard drains, concrete trenches and open containments within this drainage area are routed into the 10,000 gallon capacity Oil/Water Separator. The Oil/Water Separator discharges clean water to Neutralization Basin. Storm water runoff from this drainage area discharges into a retention pond equipped with an inverted siphon that discharges into an open ditch. The ditch eventually discharges into an arm of Harris Reservoir south of the plant. Industrial Activities: Various chemicals and potential storm water pollutants are delivered and handled at the Water Treatment Building, Bulk Warehouse and Chemical Warehouse. Hazardous materials, paints, used oils and chemicals are stored, handled and shipped at the Paint Shop. The Oil/Water Separator receives inflow from various areas of the plant and stores collected oil in an adjacent 1,000 gallon tank. Gasoline and diesel fuel is delivered by tanker truck and stored in various small tanks. Used oil is loaded into tanker trucks from various tanks for off -site disposal. The Neutralization and Settling Basins treat wastewater. Acid is delivered by tanker truck to the sulfuric acid tank. Service transformers provide power to various buildings. Solid waste is compacted in the trash compactor. The sewage lift stations pumps raw sewage to the Wastewater Treatment Plant. Miscellaneous inert materials are stored in external yard areas. Employee personal vehicles and company vehicles park on the paved and gravel parking areas. Significant Materials and Potential Pollutants: Water Treatment Building: Various water treatment chemicals. Bulk Warehouse: Various chemicals and other potential storm water pollutants. Chemical Warehouse: Various chemicals and other potential storm water pollutants. Paint Shop: Used oil, hydrazine, acids, caustics, chemistry lab materials, emptied paint and aerosol cans, and other chemicals. Gasoline, diesel fuel and used oil storage tanks: Gasoline, diesel fuel and used oil. Mobile Equipment Area: Used oil and diesel fuel. Sulfuric acid storage tank: Sulfuric acid. Oil/Water Separator and adjacent 1,000 gallon used oil collection tank: Used oil. Neutralization and Settling Basins: Untreated wastewater. Parking areas: Oils, gasoline and diesel fuel. Page 43 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 BMP Summary: Water Treatment Building, Bulk Warehouse and Chemical Warehouse: • Plant procedures are followed regarding storage and handling of all oils, chemicals and materials. • Personnel are trained in spill containment and cleanup. Spill kits are located at receiving areas. • No materials that could impact storm water are stored in exterior areas. • The 220 gallon diesel fuel and gasoline tanks near the Chemical Warehouse are within a common metal containment bin. Paint Shop: • Plant procedures are followed regarding storage and handling of all oils, chemicals and materials. • All oils and other materials that could impact storm water are stored on a covered concrete containment. • The two 220 gallon used oil storage tanks are located within metal containment bins. • Chemicals are stored inside storage cabinets. • Floor drains in the area discharge into the Oil/Water Separator. • Personnel are trained in spill containment and cleanup. Spill kits are located at the shop. Other tanks: • A 1,000 gallon temporary diesel fuel storage tank west of the Reactor Building is within a flexible containment liner. • The 8,315 gallon sulfuric acid storage tank is within a concrete containment with an open drain to a sump that pumps to the Neutralization Basin. • Plant procedures are followed regarding unloading of acid and diesel fuel. Mobile Equipment Area: • The 4,000 gallon and 2,000 gallon used oil tanks are within a common concrete containment. • The 220 gallon diesel fuel and 220 gallon used oil tanks are within a common concrete containment. • Plant procedures are followed regarding loading and unloading of all oils and fuels. • Personnel are trained in spill containment and cleanup. Spill kits are located at the shop. Oil/Water Separator: • The Oil/Water Separator and adjacent 1,000 gallon used oil collection tank are located within a concrete containment with manually operated drain valve. Containment contents are manually drained back to the Oil/Water Separator. • Plant procedures are followed regarding loading of used oil into tankers for off -site disposal. Neutralization and Settling Basins: • The basins are inspected daily. Storage Areas: • No materials that could impact storm water are stored in exterior areas. Parking areas: • Employees are trained to promptly report and respond to spills. Page 44 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 7 - Storm Water Outfall SW007 Conveyance 60" Reinforced Concrete Pipe Coordinates N 350 37' 45" W 780 57' 28" Drainage Area 45 acres % Impervious 20 % Drainage Area Description: Drainage Area 7 includes the two 110,000 gallon Auxiliary Boiler Fuel Oil Storage Tanks, the Gas Storage Yard, the Sewage Treatment Plant, a portion of the Security Training Facility, the Flex Building, two service transformers, solid waste and recycling containers, paved roads and parking areas, and grassed and wooded areas. Most of this drainage area is vegetated, non- industrial use. Storm water runoff from this drainage area discharges to the south into the Emergency Service Water Intake Canal. Industrial Activities: The two Auxiliary Boiler Fuel Oil Storage Tanks are filled by tanker truck, and associated aboveground fuel oil piping delivers fuel oil to the Auxiliary Boiler and other plant processes. Nitrogen and hydrogen gasses are stored in tanks at the Gas Storage Yard. Raw sewage is pumped from various plant lift stations to the Sewage Treatment Plant for treatment using aerobic and anaerobic processes and various water treatment chemicals. Firearms training is conducted at the Security Training Facility. Emergency equipment is routinely tested for functionality on the gravel -surfaced yard outside of the Flex Building. Service transformers provides power to the Sewage Treatment Plant and other buildings. Employee personal vehicles and company vehicles park on the paved parking areas. Significant Materials and Potential Pollutants: Auxiliary Boiler Fuel Oil Storage Tanks: Diesel fuel. Sewage Treatment Plant: Raw sewage, sodium carbonate, sodium hypochlorite, sodium hydroxide, and water treatment polymers. Security Training Facility: Lead from expended ammunition. Service transformers: Mineral oil. Flex Building: Oils and fuels in equipment being tested outside the building. Parking areas: Oils, gasoline and diesel fuel. BMP Summary: Auxiliary Boiler Fuel Oil Storage Tanks: • The fuel oil storage tanks are located within concrete containments with manually operated drain valves. Containment contents are manually drained to the Oil/Water Separator. • Aboveground fuel oil piping is located in yard areas or within concrete trenches that drain into yard drains that discharge into the Oil/Water Separator. • Tanker unloading operations are conducted on a concrete containment pad equipped with open drains to the Oil/Water Separator. • Plant procedures are followed regarding unloading diesel fuel. Sewage Treatment Plant: • Chemicals tanks are within concrete containments or are stored in totes inside metal buildings with concrete floors • The plant is inspected daily. Page 45 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Flex Building: • Personnel are trained in spill containment and cleanup. Spill kits are located at the building. Security Training Facility • Ammunition usage is tracked and lead is routinely harvested from the soil. • The soil pH is maintained within a range to prevent the lead from becoming soluble. • The transformer is inspected daily. Service transformers: • Transformers are inspected daily. Parking areas: • Employees are trained to promptly report and respond to spills. Page 46 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 8 - Storm Water Outfall SW008 Conveyance 42" Reinforced Concrete Pipe Coordinates N 350 38' 08" W 780 57' 34" Drainage Area 10 acres % Impervious 50 % Drainage Area Description: Drainage Area 8 includes the Generator Rewind Building, a legacy storm water detention pond, paved roads, gravel -surfaced areas, external storage areas, parking areas, and grassed areas. Storm water runoff from this drainage area discharges to the north into the Service Water Discharge Canal. Industrial Activities: Various chemicals and potential storm water pollutants are delivered and handled at the Generator Rewind Building. Inert materials are stored in external storage areas. Cranes and other company vehicles park on the parking areas. Significant Materials and Potential Pollutants: Generator Rewind Building: Various chemicals and other potential storm water pollutants. Parking areas: Oils, gasoline and diesel fuel. BMP Summary: Generator Rewind Building: • Plant procedures are followed regarding storage and handling of all oils, chemicals and materials. • Personnel are trained in spill containment and cleanup. Spill kits are located at receiving areas. • No materials that could impact storm water are stored in exterior areas. Storage Areas: • No materials that could impact storm water are stored in exterior areas. Parking areas: • Employees are trained to promptly report and respond to spills. Page 47 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 9 - Storm Water Outfall SW009 Conveyance 42" Reinforced Concrete Pipe Coordinates N 350 38' 07" W 780 57' 31" Drainage Area 9 acres % Impervious 70 % Drainage Area Description: Drainage Area 9 includes the tanker unloading station and fuel forwarding pumps for the two Emergency Diesel Generator underground fuel oil storage tanks, a service transformer, paved roads, gravel -surfaced areas, external storage areas, and grassed areas. Storm water runoff from this drainage area discharges into the Service Water Discharge Canal. Industrial Activities: Tanker trucks unload into the two Emergency Diesel Generator underground fuel oil storage tanks. Fuel oil is pumped from the tanks to the Diesel Generator Building. A service transformer provides power for maintenance and testing activities. Company vehicles and freight trucks use the access roads. Significant Materials and Potential Pollutants: Tanker unloading station and fuel forwarding pumps: Fuel oil. Service transformers: Mineral oil. Access roads: Oils, gasoline and diesel fuel. BMP Summary: Tanker unloading station and fuel forwarding pumps: • Tanker unloading and pumps are within a curbed concrete containment apron with open drain to the Oil/Water Separator. • Plant procedures are followed regarding tanker unloading operations. • Personnel are trained in spill containment and cleanup. Spill kits are located at the tanker unloading station Shelter for chemical treatment totes: • Totes are within plastic containments under shelter. Service transformer: • Transformer is inspected daily. Storage Areas: • No materials that could impact storm water are stored in exterior areas. Access roads: • Employees are trained to promptly report and respond to spills. Page 48 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area 10 Conveyance Overland flow Coordinates N 350 38' 06" W 780 57' 50" Drainage Area 7 acres % Impervious 20 % Drainage Area Description: Drainage Area 10 is located west of Drainage Area 7 and includes a portion of the Security Training Facility, a service transformer, a sewage lift station, a trash dumpster, paved parking areas, and grassed and wooded areas. Most of this drainage area is vegetated, non -industrial use. Storm water runoff from this drainage area discharges via overland flow along the Emergency Service Water Intake Canal. Industrial Activities: Firearms training is conducted at the Security Training Facility. The sewage lift stations pump raw sewage to the Wastewater Treatment Plant. The service transformer provides power to the Security Training Facility. Trash is collected in the dumpster. Employee personal vehicles and company vehicles park on the paved parking areas. Significant Materials and Potential Pollutants: Security Training Facility: Lead from expended ammunition, mineral oil in service transformer. Sewage lift station: Raw sewage overflow. Trash dumpster: Miscellaneous trash. Parking areas: Oils, gasoline and diesel fuel in vehicles. BMP Summary: Security Training Facility • Ammunition usage is tracked and lead is routinely harvested from the installed backstops. • The soil pH is maintained within a range to prevent the lead from becoming soluble. • The service transformer is per Operation rounds. Sewage lift station: • Station is inspected per Operation and Chemistry rounds. Parking areas: • Employees are trained to promptly report and respond to spills. Page 49 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Drainage Area A Conveyance Overland flow into ditch Coordinates N 350 38' 26" W 780 57' 15" Drainage Area 5 acres % Impervious 0 % Drainage Area Description: Drainage Area A is located north of Drainage Area 1 and is comprised of non -industrial use grassed areas. Storm water runoff from this drainage area discharges through a ditch into Harris Reservoir north of the causeway. Industrial Activities: None. Significant Materials and Potential Pollutants: None. BMP Summary: Not applicable. Drainage Area B Conveyance Overland flow into ditch Coordinates N 350 38' 06" W 780 57' 50" Drainage Area 28 acres % Impervious 4 % Drainage Area Description: Drainage Area B is located north of Drainage Area 7 and includes two facility maintenance storage buildings, gravel -surfaced roads, paved and gravel -surfaced external storage areas, and grassed and wooded areas. Most of this drainage area is vegetated, non -industrial use. Storm water runoff from this drainage area discharges through a ditch into the Service Water Discharge Canal. Industrial Activities: Cranes, equipment, and inert materials are stored in external storage areas. Significant Materials and Potential Pollutants: Storage areas: Sand and gravel; oils, gasoline and diesel fuel in vehicles and equipment. BMP Summary: Parking and storage areas: • No materials that could impact storm water are stored in exterior areas. • Employees are trained to promptly report and respond to spills. Page 50 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix C NPDES Permitted Wastewater Outfalls Summary (NPDES Permit Number NC0039586) Page 51 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 NPDES Permit NCO039586 - Permitted Outfalls Summary Outfall Discharge Description Discharge Point 001 Cooling tower Blowdown Internal 002 Sanitary Waste Treatment Plant Internal 003 Metal Cleaning Wastes Internal 004 Low Volume Waste Internal 005 Radwaste System Internal 006 Combined Outfalls 001 through 005 Harris Reservoir Page 52 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix D Spills and Leaks History (NPDES Permit number NC0039586: Part 1, Section A 21.2.a(4)) Page 53 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Significant Spills and Leaks History Previous 3 Years Date Volume of Spill Location Discussion Note: EPA has defined significant spills to include releases within a 24-hour period of hazardous substances in excess of reportable quantities under Section 311 of the Clean Water Act and Section 102 of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Reportable quantities are set amounts of substances in pounds, gallons, or other units and are listed in 40 CFR Part 117 and 40 CFR Part 302. Releases are defined to include any spilling, leaking, pumping, pouring, emitting, emptying, discharging, injecting, escaping, leaking, dumping, or disposing into the environment. NC requires the reporting of any petroleum release causing a sheen on waters of the US, any petroleum release of any quantity occurring within 100 feet of these waters, and any petroleum release to soil of 25 gallons and greater. Regarding reporting of petroleum releases; the plant SPCC Coordinator shall provide the required notifications to the National Response Center (NRC), appropriate state agencies, and the Environmental Corporate Support SME in accordance with guidelines outlined in the EHS Manual Chapter: ADMP-ENV-EVS-00012 Oil Spill Reporting. Any oil spill to the Shearon Harris Reservoir (including the Make -Up Water Intake Canal, Emergency Service Water Intake Canal, and Emergency Service Water Discharge Canal), to any wetlands or tributaries, or any oil spill occurring within 100 feet of these water bodies is reportable. Page 54 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix E Non -Storm Water Discharge Certification (NPDES Permit number NC0039586: Part 1, Section A 21.3(f)) Page 55 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Non -Storm Water Discharge Assessment and Certification (EXAMPLE) Completed By: Title: Date: Date of Assessment Outfall Observed Method Used Evaluate Discharge Describe Results from Assessment for the Presence of Non -Storm Water Discharge Identify Potential Significant Sources Name of Person Conducting the Assessment SW001 Visual, plant drawings SWO02 Visual, plant drawings SWO03 Visual, plant drawings SWO04 Visual, plant drawings SWO05 Visual, plant drawings SWO06 Visual, plant drawings SWO07 Visual, plant drawings SWO08 Visual, plant drawings SWO09 Visual, plant drawings SW010 Visual, plant drawings Comments: Signature: Date Signed: Page 56 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix F Material Inventory, Storage and Secondary Containment (NPDES Permit number NC0039586: Part 1, Section A 21.2(c)) Page 57 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Bulk Liquid Storage and Secondary Containment Container Container Capacities Location Secondary Containment Field -Erected Diesel Fuel Two 110,000 gallon tanks Southwest area of plant yard Common concrete containment Storage Tanks structure Used Oil Storage Tanks Two 220 gallon tanks Paint Shop covered concrete pad Common metal containment bin Misc. Petroleum Storage Drums Approx. fifty 55 gallon drums Paint Shop covered concrete pad Covered concrete pad with open floor drain to Oil/Water Separator Mobile Fuel Truck Tanks One mobile 280 gallon diesel fuel tank Southwest yard area in standby mode Drains to Oil/Water Separator in (one diesel fuel tank and one One mobile 280 gallon gasoline tank standby mode gasoline tank on one truck) OWS Used Oil Storage Tank One 1,000 gallon tank Adjacent to Oil/Water Separator Curbed concrete containment Diesel Fuel Storage Tank One 220 gallon tank Southwest area of plant yard near Metal containment bin Chemical Warehouse Gasoline Storage Tank One 220 gallon tank Southwest area of plant yard near Metal containment bin Chemical Warehouse Used Oil Storage Tanks One 2,000 gallon used oil tank Southern area of plant yard in Common concrete containment One 4,000 gallon used oil tank Mobile Equipment area structure Used Oil Storage Tank One 220 gallon tank Southern area of plant yard in Concrete containment structure Mobile Equipment area Diesel Fuel Storage Tank One 220 gallon tank Southern area of plant yard in Concrete containment structure Mobile Equipment area Fire Pump Diesel Fuel One 550 gallon tank Southern area of plant yard near Concrete containment structure Storage Tank Emergency Service Water Intake Trailer -Mounted Mobile Used One mobile 1,000 gallon tank Southwest yard area in standby mode Drains to Oil/Water Separator in Oil Storage Tank standby mode Oil Filter Drain Tank One 200 gallon tank Inside Mobile Equipment Building Drains to Oil/Water Separator Used Cooking Oil Storage Two 55 gallon drums Adjacent to Cafeteria Poly containment shelter Drums Page 58 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Bulk Liquid Storage and Secondary Containment Container Container Capacities Location Secondary Containment Hydrogen Seal Oil/Water Drain Tank One 100 gallon tank Adjacent to Turbine Building Concrete containment structure Turbine Generator Batch Oil Storage Tank One 14,000 gallon tank Inside Turbine Building Concrete containment structure Turbine Lube Oil Sump Tanks Two 1,500 gallon tanks Inside Turbine Building Concrete containment structure Diesel Fuel Day Tanks Two 3,000 gallon tanks Inside Emergency Diesel Generator Building Concrete containment structure Used Oil Storage Tank One 1,000 gallon tank Adjacent to Emergency Diesel Generator Concrete containment structure Diesel Generator Set One 1,400 gallon tank North of Reactor Building Integral double -walled container Diesel Fuel Day Tank One 275 gallon tank Inside Security Building Security Building concrete floor Temporary Diesel Fuel Storage Tank One 1,000 gallon tank West of Reactor Building Flexible curbed containment liner Diesel Fuel Storage USTs for the Emergency Diesel Generators Two 175,000 gallon USTs Northern area of plant yard Underground Diesel Fuel Storage UST for the Security Systems Emergency Diesel Generator One 1,000 gallon UST Adjacent to Security Building Underground Diesel Fuel Storage UST One 10,000 gallon UST Mobile Equipment Building Underground Gasoline Storage UST One 10,000 gallon UST Mobile Equipment Building Underground Sodium Hypochlorite Tank One 5,600 gallon tank Cooling Tower Concrete containment structure Water Treatment Chemical Tank One 500 gallon tank Cooling Tower Concrete containment structure Page 59 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Bulk Liquid Storage and Secondary Containment Container Container Capacities Location Secondary Containment Phosphoric Acid Tank One 6,500 gallon tank North of Cooling Tower Concrete containment structure Water Treatment Chemical Tanks Three 4,500 gallon tanks North of Cooling Tower Concrete containment structure Caustic Storage Tank One 10,800 gallon tank South end of the Turbine Building Concrete containment structure Sulfuric Acid Storage Tank One 4,500 gallon tank South end of the Turbine Building Concrete containment structure Ammonia Storage Tank One 1,500 gallon tank South end of the Turbine Building Concrete containment structure Liquid Nitrogen Storage Tank One 6,000 gallon tank South end of the Turbine Building Concrete containment structure Sulfuric Acid Storage Tank One 8,315 gallon tank East end of the Water Treatment Building. Concrete containment structure with open drain to sump that pumps to the Neutralization Basin. Sodium Carbonate Tank One 350 gallon tank Sewage Treatment Plant Concrete containment structure Sodium Hypochlorite Tank One 350 gallon tank Sewage Treatment Plant Concrete containment structure Sodium Hydroxide Tank One 350 gallon tank Sewage Treatment Plant Concrete containment structure Water Treatment Polymer Totes Two 300 gallon totes Sewage Treatment Plant Interior building floor and sump A listing of all materials is maintained in the HNP Chemical Inventory Report. Page 60 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix G Spill Prevention and Response Procedures (NPDES Permit number NC0039586: Part 1, Section A 21.2(c)) Page 61 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Spill Prevention and Response Procedures Procedure Description Procedure Reference Stormwater Compliance AD-EN-ALL-0410 Duke Energy, Environmental Compliance Manual — ENV-30-20 Stormwater Compliance Duke Energy, Environmental Compliance Manual — ADMP-ENV-EVS-00012 Oil Spill Reporting Oil Spill Prevention, Control and Countermeasure AD-EN-ALL-0210 (SPCC) Rule Compliance Spill Response Procedure AD-EN-ALL-0200 Nuclear Chemical Control Program Procedure AD-EN-ALL-0045 Duke Energy, Environmental Compliance Manual — ADMP-ENV-EVS-00020 Hazardous Substances Releases Duke Energy Construction Stormwater Planning GDLP-ENV-EVS-00006 Manual NPDES Stormwater EMP-003 These procedures are maintained per Enterprise and Nuclear FileNet procedures and policies. Page 62 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix H Best Management Practices Preventative Maintenance • Good Housekeeping Program (NPDES Permit number NC0039586: Part 1, Section A 21.2(d)) Page 63 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 HARRIS NUCLEAR PLANT BEST MANAGEMENT PRACTICES Best Management Practices (BMPs) are methods, procedures, processes, prohibitions of practices and other management controls which serve to eliminate, mitigate, or reduce pollutant loadings in storm water discharges. BMPs employed at the Harris Nuclear Plant include: • Source Reduction; • Good Housekeeping; • Preventive Maintenance; • Visual Inspections; • Spill Prevention and Response; • Erosion and Sediment Control; • Storm Water Runoff Management; • Employee Training; • Recordkeeping and Reporting; • Containment/Diversion; • Recycling; • Treatment. Source Reduction Source reduction measures minimize the potential for storm water pollution by reducing the quantity of materials which may contact storm water. Source reduction measures may require modifications in present work habits and practices, and may include components of: • Good Housekeeping; • Preventive Maintenance; • Visual Inspections; • Spill Prevention and Response; • Erosion and Sediment Control. Source reduction measures are addressed as main components of BMPs. Consequently, source reduction measures should be considered and included with the development and modification of any BMPs. Page 64 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Good Housekeeping Good housekeeping practices are designed to maintain a clean and orderly work environment. Good housekeeping practices should be incorporated in the day-to-day conduct of operations and maintenance. A clean and orderly work area reduces the possibility of accidental spills caused by the mishandling of chemicals and equipment. Well maintained material and chemical storage areas reduce the possibility of storm water mixing with pollutants. The following practices shall be performed on a regular basis: • Maintain clean and dry floors, ground surfaces, work, and process areas through the use of brooms, shovels, vacuum cleaners, mops and cleaning equipment; • Regular pickup and disposal of waste material; • Proper operation of equipment; • Routine visual inspections by qualified personnel for leaks or spills, and for conditions which may lead to a leak or spill (such as the hazardous waste inspections being performed at various areas throughout the Harris Nuclear Plant); • Training of employees in spill prevention and cleanup procedures; • Bags storing dry chemicals shall be raised off the floor, preferably by pallet, to prevent any unwanted interaction of the chemical and water; • Walkways shall be maintained free of obstructions to facilitate inspection for leaks or spills. At least once a year, the Pollution Prevention Team shall inspect work and storage areas to verify housekeeping is being maintained. Preventive Maintenance The Preventative Maintenance Program has been established and combined with the Facility Inspection Program. The Hazardous Materials, Gas, Oil, and Environmental Release programs are controlled by Plant Procedures. Any maintenance activities required will be incorporated into that program are noted. The Preventative Maintenance Program will follow the Facility Inspection Program. Facility walk downs and responsibilities for identification of deficiencies. AD-EN-ALL-0410 provides guidance for the oil and liquid waste management program. Operations personnel perform daily and weekly walk downs of the plant. Plant engineers perform periodic inspections of assigned areas documenting deficiencies. Inspections of the storm water control systems will occur when the storm water conveyances are visually inspected on a semiannual basis as EMP-003 procedure. This inspection will include clean out and maintenance of catch basins, ditches and material handling equipment. This program also combines inspections for lay down areas, outside storage areas, and secondary containment inspections. Page 65 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Preventive maintenance will be performed to ensure that storm water management facilities and controls operate correctly and effectively and to reduce their breakdowns and failure. Specific activities include: • Periodic inspection, cleanout and maintenance of catch basins, containment areas, ditches and material handling equipment; • Periodic scheduled inspection and testing of equipment and systems, including pumps, valves, pipes, storage tanks, and controls; • Proper scheduled maintenance of equipment and facilities. Additional preventive maintenance information will be provided as a separate section of the SWPPP Plan. Visual Inspections Visual inspections will be performed in accordance with the requirements of the facility SPCC Plan; and in conjunction with other BMPs such as housekeeping and preventive maintenance. Inspections may also be performed as a separate activity. When performed as an independent activity, the inspections will be performed by qualified personnel. The inspections will include reviews of past inspections and preventive maintenance, inspections of equipment, areas, and facilities, and any necessary follow-up. A record of each inspection will be maintained to verify that corrective measures are implemented on a timely basis. Inspections will include the following areas at a minimum: • Bulk oil and chemical storage tanks and containments; • Tanker loading and unloading areas; • Waste generation, storage, handling treatment, and disposal areas; • Sewage Treatment Plant and sewage lift stations; • Water Treatment Building, Neutralization Basin and Settling Basin; • Sandblast area; • Plant external lay down and storage areas; • Transformer Yard; • Switchyard and service transformers; • Cooling Tower area including pumps and water treatment chemicals and systems; • Security Training Facility and Firing Range; • Mobile Equipment Area; • Warehouse receiving and material handling areas; Page 66 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 • Paint Shop; • Construction and land disturbance areas; • Areas where past spills/leaks have occurred; • Pumps, valves, and control facilities. Specific items to be noted include: • Corroding or damaged drums, tanks, or other containers; • Damaged structural storage areas; • Inoperative or leaking pumps and valves; • Leaking or damaged piping or damaged piping supports; • Windblown/airborne dust/dry chemicals; • Inadequate erosion and sediment controls; • Evidence of seepages indicative of leaking underground piping; • Proper labeling of drums; • Evidence of leaks or spillage; • Warning labels present; • Rain water drained from secondary containments; • Rain water checked for oil or chemicals before release and documented. Spill Prevention and Response Spill prevention will be achieved by good housekeeping, visual inspection, and preventive maintenance, and through training of personnel in material handling and storage procedures, and the use of equipment. Training in proper spill identification and cleanup procedures, including the use of equipment and the notification and documentation procedures, will be the main components of spill response. Specific spill preventative measures will include: • Piping protection, such as routing, coatings and wrappings, and cathodic protection where appropriate; • Adherence to current unloading procedures and practices, including monitoring and verification of all connections, disconnections, and seals; • Proper valve and control settings, and adequate labels, markings, and communications, to ensure that accidental closures or openings do not occur; • Adequate security to prevent non -authorized access to facilities; • Appropriate documentation of actions taken. Page 67 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Spill response will be in accordance with existing Plant Procedures, including the Spill Prevention, Control and Countermeasure (SPCC) Plan. Training is essential to a well -executed Spill Response. Personnel will be trained to identify potential storm water pollution occurrences as may occur during a spill event, and respond in appropriate manner. Specific items in Spill Response include: • Establishment and training of the plant personnel in spill response, cleanup, documentation, and notification; • Safety measures; • Notification procedure for plant and the appropriate public authorities; • Safety and cleanup equipment; • Monitoring and verification of cleanup efforts. Erosion and Sediment Control Areas under construction involving land disturbing activities, or where accelerated erosion or sedimentation is occurring, will be monitored and corrective measures will be implemented as necessary. An Erosion and Sedimentation Control Plan and Permit is required for any land disturbing activities of one acre or greater. The Storm Water Pollution Prevention Team will decide if an Erosion and Sedimentation Control Plan and Permit is required. The NCDEQ Raleigh Regional Office of Energy, Mineral and Land Resources Division (DEMLR) shall be contacted as necessary to apply for and obtain any required permits. Typical temporary BMPs utilized to control erosion and prevent off -site sedimentation include silt fences, sediment traps and basins, rock check dams, wattles, and diversion channels. Permanent BMPs include riprap-lined channels, paved ditches, grassed channels, permanent storm water detention ponds, and permanent ground stabilization measures. Re -vegetation or equivalent stabilization of the disturbed areas will be performed to reduce/eliminate accelerated erosion and prevent off -site sedimentation. Storm Water Runoff Manaaement Uncontaminated storm water will be diverted away from potential sources of contamination, and where possible, discharged to a stabilized conveyance structure. Contaminated waters will be directed to the appropriate treatment facilities prior to discharge. Diversion efforts should be made to reduce the quantity of contaminated storm water which must be collected and treated depending on conditions. Vehicle washing should be performed in areas that do not discharge through storm water outfalls. Page 68 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Employee Training Training programs are essential for providing employees with a complete understanding of the Storm Water Pollution Prevention Plan (SWPPP). Employee training at the Harris Nuclear Plant is conducted as necessary to inform and educate personnel who's work activities have the potential to impact storm water runoff of the components and goals of the SWPPP. General training of employees will emphasize good housekeeping, preventive methods, procedures, and practices. Responsibilities will be clearly communicated to personnel, including notification procedures for preventive and corrective measures. Maintenance and inspection personnel will have the authority to follow-up on areas requiring improvement. Plant personnel will be trained in safety and cleanup operations, and to recognize spill events which may contribute to storm water pollution. The Harris Nuclear Plant Spill Prevention Control and Countermeasure Plan (SPCC) requires training for all oil -handling personnel regarding ensure an adequate understanding of: • Proper operation and maintenance of equipment to prevent discharges of oil; • Procedures to follow upon discovery of any petroleum release; • SPCC Plan required inspection and documentation requirements; • Applicable pollution control laws and regulations; • Locations and use of release response and clean-up supplies, equipment and materials; • Description and causes of known petroleum releases at the facility; • Information on names and phone numbers for reporting releases to appropriate facility personnel; • General contents of the SPCC plan. All environmental training is conducted and assigned in MyTraining or Nuclearn. Training reports for annual SWPP and SPCC training can be printed as need. Training is assessed annually. Recordkeeping and Reports As part of the foregoing actions, plant personnel will have the responsibility to prepare the appropriate records to implement and maintain the SWPPP Plan. Page 69 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Containment/Diversion These measures require a physical structure or barrier to be installed to divert storm water away from potential pollutant sources or to contain potential pollutant sources. Diversion measures function best where runoff can be directed to a drainage channel where containment at the source is impractical. Containment functions best in areas where material will be permanently stored, handled, or used. Specific containment/diversion measures include: • Segregation of the work area; • Covering or enclosing the work area; • Diking the work area; • Diversion of storm water runoff, via pipes, and catch basins, or channels; • Dust controls. Recycling No recycling of contaminated storm water occurs at the plant. Recycling of some solid and hazardous wastes is performed and is coordinated by Environmental Services, Chemistry, and Material and Contract Services. Treatment Treatment measures will be the last step prior to the discharge of contaminated storm water. Treatment is employed at the plant for those areas where, due to site constraints, other BMPs have been found to be infeasible or too costly to implement. Storm drain flows, floor drains, runoff from material storage areas, and runoff from the Security Firing Range are the principle sources of contaminated storm water which must be treated. Page 70 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix I SWPPP Inspection Records (NPDES Permit number NC0039586: Part 1, Section A 21.2(d)) Page 71 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 All inspections are conducted per EMP-003. The semi-annual inspections are quantitative only as requited by NPDES Permit number NC0039586: Part 1, Section A 21 1. Page 72 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix J Employee Training Records (NPDES Permit number NC0039586: Part 1, Section A 21.2(e)) Page 73 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 EMPLOYEE TRAINING Training programs are essential for providing employees with a complete understanding of the Storm Water Pollution Prevention Plan (SWPPP). Employee training at the Harris Nuclear Plant is conducted as necessary to inform and educate personnel who's work activities have the potential to impact storm water runoff of the components and goals of the SWPPP. The Harris Nuclear Plant Spill Prevention Control and Countermeasure Plan (SPCC) requires training for all oil -handling personnel regarding ensure an adequate understanding of: • Proper operation and maintenance of equipment to prevent discharges of oil; • Procedures to follow upon discovery of any petroleum release; • SPCC Plan required inspection and documentation requirements; • Applicable pollution control laws and regulations; • Locations and use of release response and clean-up supplies, equipment and materials; • Description and causes of known petroleum releases at the facility; • Information on names and phone numbers for reporting releases to appropriate facility personnel; • General contents of the SPCC plan. SWPPP & SPCC Plan General Awareness Training is included as part of the annual re - qualification process. The facility Environmental Coordinator is responsible for providing direction and guidance to implement the training. Facility Supervisors are responsible for identifying training needs for their personnel and for ensuring that workers under their supervision successfully complete and maintain appropriate training. All environmental training is conducted and assigned in MyTraining or Nuclearn. Training reports for annual SWPP and SPCC training can be printed as need. Training is assessed annually. Page 74 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 ENW009 Storm Water Pollution Prevention Plan -Computer Based Training Overview: This training provides a general introduction and overview of the impacts storm water runoff has on the environment, sources of storm water pollution, and the employee's role in storm water pollution prevention. ENC005 - Spill Prevention, Control and Countermeasure Plans — Computer Based Training Overview: Spill Prevention, Control and Countermeasure Plans are required at several Duke Energy sites. SPCC Plans initiate the development of comprehensive programs to minimize the hazards to human health and the environment through prevention and control of oil spills. This SPCC training provides specific information on SPCC plan requirements as well as your responsibilities when encountering oil spills. This course also includes information on site specific SPCC Plans. Page 75 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix K Record of SWPPP Amendments and Annual Updates (NPDES Permit number NC0039586: Part 1, Section A 21.2(g)) Page 76 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Record of SWPPP Amendments and Annual Updates Date Revision No. Revised By Reason for Amendment/Update 9/1/1997 0 S. L. England R. T. Wilson Initial development of SWPPP 8/3/1998 1 J. P. Cooke R. T. Wilson Annual review and updates 11/25/2003 2 R. T. Wilson Company name change, tracking of annual reviews in Passport, SPCC plan revision 1/19/2011 3 R. T. Wilson SPCC plan revision, added tracking sheet for annual reviews 8/28/2018 4 M. E. McGary R. T. Wilson SWPPP review and format update 8/21/2019 4 R. T. Wilson SWPPP annual review (NTM 00699123-08) and Revision to Storm Water Maps is required after the completion of SOCO and ERAS ro'ects NTM 02288046-03 . 9/10/2020 5 M. E. McGary R. T. Wilson SWPPP annual review, SWPPP Maps update and format update (NTM 02288046-01 and 02288046-03). Minor editoral changes. 10/27/2021 5 R.T. Wilson No revision is required. Awaiting new Storm water permit (NTM 02288046-02), Page 77 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix L Analytical Monitoring Procedures and Results Documentation (NPDES Permit number NC0039586: Part 1, Section A 21.2(h)) Page 78 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Per NPDES Permit Part I, Section A 21.1, no analytical monitoring of storm water is required. Page 79 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix M Qualitative Monitoring Procedures and Results Documentation (NPDES Permit number NCO039586: Part 1, Section A 21.2(h)) Page 80 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Forms in plant procedure EMP-003 `NPDES Stormwater" are used to document the require inspections. Page 81 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix N Storm Water Permit (NPDES Permit number NC0039586: Part 1, Section A 21 Page 82 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 No individual industrial storm water permit has been issued for HNP. Per NPDES Permit Part I, Section A 21; storm water conditions under this section will expire on the effective date when an individual storm water permit is issued to the facility by the Division of Energy, Mineral and Land Resources (NCDEMLR). Page 83 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Appendix O Industrial Storm Water Fact Sheet Sector O: Steam Electric Power Generating Facilities Table 2 Page 84 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 TABLE 2 BMPS FOR POTENTIAL POLLUTANT SOURCES AT STEAM ELECTRIC GENERATING FACILITIES Pollutant Source BMPs Fugitive dust ❑ Establish proceduresto minimize offsite tracking of coal dust. emissions ❑ Use specially designed tires. ❑ Wash vehicles before they leave the site in a designated areawhere wash water can be controlled. Delivery vehicles ❑ Develop procedure for the inspection of all vehicles arriving on the plant site and ensure overall integrity of the body or container. ❑ Control leakage or spillage from vehicles or containers and ensure that proper protective measures. Fuel oil unloading ❑ Confine loading/unloading activities to designated areas outside drainage pathways and away areas from surface waters. ❑ Provide diversion berms, dikes or grassed swales around the perimeter of the area to limit run-on. ❑ Use containment curbs in unloading areas. ❑ Use spill and overflow protection (drip pans, drip diapers, etc.) beneath fuel oil connectors. ❑ For rail transfer, a drip pan shall be installed within the rails to collect spillage from the tank. ❑ Develop and implement spill prevention, containment, and countermeasure (SPCC) plans. ❑ Train employees in spill prevention, control and cleanup. ❑ Personnel familiarwith spill prevention and response procedures should be presentduring unloading to ensure that any leaks or spills are immediately contained and cleaned up. Chemical loading/ ❑ Cover chemical loading/ unloadingareas and store chemicals indoors, when possible. unloading areas ❑ Provide diversion berms, dikes or grassed swales around the perimeter of the area to limit run-on. ❑ Use containment curbs at chemical loading/ unloadingareas. ❑ Develop and implement spill prevention, containment, and countermeasure (SPCC) plans. ❑ Train employees in spill prevention, control and cleanup. ❑ Personnel familiarwith spill prevention and response procedures should be presentduring unloading to ensure that any leaks or spills are immediately contained and cleaned up. Miscellaneous ❑ Confine loading/unloading activities to designated areas outside drainage pathways and away loading/unloading from surface waters. ❑ Inspect containers for leaks ordamage priorto loading/unloading. ❑ Avoid loading/unloading materials in the rain or provide cover or other protection for loading docks. Page 85 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 ❑ Provided iversion berms, dikes or grassed swales around the perimeter of the area to limit run-on. ❑ Cover loading and unloading areas and perform these activities on an impervious pad to enable easy collection of spilled materials. ❑ Slope the impervious concrete floor or pad to collect spills and leaks and convey them to proper containment and treatment. ❑ Regularly sweep areato minimize debris on the ground. Liquid storage tanks ❑ Cover and/or enclose chemical storage areas (including temporary cover such as a tarp that prevents contact with precipitation). Provide secondary containment around chemical storage areas. ❑ If containment structures have drains, ensure that the drains have valves, and that valves are maintained in the closed position. Institute protocols for checking/testing stormwater in containment areas prior to discharge. ❑ Use double -walled tanks with overflow protection. ❑ Locate storage areas away from high traffic areas and surface waters. ❑ Inspect storagetanks and piping systems (pipes, pumps, flanges, couplings, hoses,andvalves) forfailures or leaks and perform preventive maintenance. ❑ Maintain an inventory of fluids to identify leakage. ❑ Providefluid level indicators. ❑ Properlydispose of chemicals that are no longer in use. ❑ Store and handle reactive, ignitable, orflammable liquids in compliance with applicable local fire codes, local zoning codes, and the National Electric Code. ❑ Provide drip pads/pans where chemicals are transferred from one container to another to allow for recycling of spills and leaks. ❑ Use dry cleanup methods. ❑ Develop and implement spill plans or spill prevention, containment, and countermeasure (SPCC) plans, if required for your facility. ❑ Train employees in spill prevention and control and proper materials management. Large bulkfuel ❑ If area is uncovered, connect sump outlet to sanitary sewer (if possible) or an oil/water storage separator, catch basin filter, etc. If connecting to a sanitary sewer check with the system operator to ensure that the discharge is acceptable. If implementing separator or filter technologies ensure that regular inspections and maintenance procedures are in place. Above ground tanks ❑ Provide secondary containment, such as dikes, with a height sufficient to contain a spill (thegreaterof 10percent ofthe total enclosed tank volume or1 10percentofthevolume contained in the largest tank). ❑ If containment structures have drains, ensure that the drains have valves, and that valves are maintained in the closed position. Institute protocols for checking/testing stormwater in containment areas prior to discharge. ❑ Use double -walled tanks with overflow protection. ❑ Keep liquid transfer nozzles/hoses in secondary containment area. ❑ Develop and implement spill plans or spill prevention, containment, and countermeasure (SPCC) plans, if required for your facility. ❑ Train emr)lovees in spill prevention and control. Page 86 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Oil bearing equipment switchyards ❑ Construct level grades and gravel surfaces to retard flows and limit the spread of spills. ❑ Collect stormwater runoff in perimeter ditches. Residue hauling ❑ Inspect all residue hauling vehicles for proper covering over the load, adequate gate sealing, vehicles and overall integrity of the body or container. ❑ Repairvehicles lacking in the above qualities. Vehicle and Good Housekeeping equipment maintenance ❑ Eliminate floor drains that are connected to the storm or sanitary sewer; if necessary, install a sump that is pumped regularly. Collected wastes should be properlytreated or disposed of by a licensed waste hauler. ❑ Do all cleaning at a centralized station so the solvents stay in one area. ❑ If parts are dipped in liquid, remove them slowlyto avoid spills. ❑ Use drip pans, drain boards, and drying racks to direct drips back into afluid holding tank for reuse. ❑ Drain all parts of fluids prior to disposal. Oil filters can be crushed and recycled. ❑ Promptly transfer used fluids to the proper container; do not leave full drip pans or other open containers around the shop. Empty and clean drip pans and containers. ❑ Clean up leaks, drips, and other spills without using large amounts of water. Use absorbents for dry cleanup whenever possible. ❑ Prohibit the practice of hosing down an area where the practice would result in the discharge of pollutants to a stormwater system. ❑ Do not pour liquid waste into floor drains, sinks, outdoor storm drain inlets, or other storm drains or sewer connections. ❑ Maintain an organized inventory of materials. ❑ Eliminate or reduce the number and amount of hazardous materials and waste by substituting nonhazardous or less hazardous materials. ❑ Label and track the recycling of waste material (e.g., used oil, spent solvents, batteries). ❑ Store batteries and other significant materials inside. ❑ Dispose of greasy rags, oil filters, airfilters, batteries, spent coolant, and degreasers in compliance with RCRA regulations. Minimizing Exposure ❑ Perform all cleaning operations indoors or under covering when possible. Conduct the cleaning operations in an areawith a concrete floorwith no floordrai nage otherthan to sanitary sewers ortreatmentfacilities. ❑ If operations are uncovered, perform them on a concrete pad that is impervious and contained. ❑ Parkvehicles and equipment indoors or under roof whenever possible and maintain proper control of oil leaks/spills. ❑ Check vehicles closely for leaks and use pans to collect fluid when leaks occur. Page 87 of 88 STORM WATER POLLUTION PREVENTION PLAN Revsion 5 September 2020 Pollutant Source BMPs Vehicle and Management of Runoff equipment maintenance ❑ Use berms, curbs, or grassed swales other diversion measures to ensure that stormwater (continued) runoff from other parts of the facility does not flow over the maintenance area. ❑ Collect the stormwater runoff from the cleaning area and provide treatment or recycling. ❑ Discharge vehicle wash or rinse water to the sanitary sewer (if allowed by sewer authority), wastewater treatment, a land application site, or recycle on -site. DO NOT discharge washwater to a storm drain orto surface water. Inspections and Training ❑ Inspect the maintenance area regularly to ensure BMPs are implemented. ❑ Train employees on waste control and disposal procedures. Material ❑ Store materials indoors. storage areas ❑ Cover material with a temporary covering made of polyethylene, polyurethane, polypropylene, or hypalon. ❑ Provide diversion berms, dikes or grassed swales around the perimeter of the area to limit run-on. ❑ Construct an enclosure or build a berm around the area. ❑ Regularly sweep area to minimize debris on the ground. ❑ Train employees in spill prevention, control, cleanup and proper materials management techniques. Fueling operations ❑ Conduct fueling operations (including the transfer of fuel from tanktrucks) on an impervious or contained pad or under a roof or canopy where possible. Covering should extend beyond spill containment pad to prevent rain from entering. ❑ When fueling in uncovered area, use a concrete pad (not asphalt, which is not chemically resistant to the fuels being handled). ❑ Use drip pans where leaks or spills of fuel can occur and where making and breaking hose connections. ❑ Use fueling hoses with check valves to prevent hose drainage after filling. ❑ Keep spill cleanup materials readilyavailable. ❑ Clean up spills and leaks immediately. ❑ Minimize/eliminate run-on onto fueling areas with diversion dikes, berms, curbing, surface grading or other equivalent measures. ❑ Collect stormwater runoff and provide treatment or recycling. ❑ Provide curbing or posts around fuel pumps to prevent collisions from vehicles. ❑ Use drycleanupmethodsforfuelarearatherthanhosing the fuel areadown. ❑ Perform preventive maintenance on storage tanks to detect potential leaks before they occur. ❑ Inspect the fueling area to detect problems before they occur. ❑ Discourage "topping off'of fuel tanks. ❑ Train personnel on vehicle fueling BMPs. 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