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HomeMy WebLinkAboutNC0003433_Draft Part I & map_20170331Permit NC0003433 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES DRAFT PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, Duke Energy Progress LLC is hereby authorized to discharge wastewater from a facility located at the Cape Fear Steam Electric Power Plant 500 CP&L Road Moncure Chatham County to receiving waters designated as an unnamed tributary to the Cape Fear River (Outfalls 007, 010A, 010B), as Shaddox Creek (Outfall 009), and as Cape Fear River (Outfalls 008, 011A, 011B, 011C, 011D) in the Cape Fear River Basin in accordance with effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I, II and III hereof This permit shall become effective ........................................... tbd. This permit and authorization to discharge shall expire at midnight on December 31, 2021. Signed this day tbd. 1.. S. Jay Zimmerman, P.G. Director, Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 42 Permit NC0003433 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. Duke Energy Progress LLC is hereby authorized to: Continue to operate the following systems located at the decommissioned Cape Fear Steam Electric Power Plant at 500 CP&L Road near Moncure in Chatham County: • West Ash Basin (Internal Outfall 001). This outfall is designated as an emergency discharge only and will consist of ash basin comingled decanting wastewater and storm water. This is limited to discharging excess wastewater above the available treatment plant capacity during an eminent threat of West Ash Basin overflow. • East Ash Basin (Internal Outfall 005). This outfall is designated as an emergency discharge only and will consist of ash basin comingled decanting wastewater and storm water. This is limited to discharging excess wastewater above the available treatment plant capacity during an eminent threat of East Ash Basin overflow. • Combined Wastewater to an Unnamed Tributary to the Cape Fear River (Outfall 007). This outfall will discharge combined flows of designated seeps and storm water to the facility's effluent channel, and episodic emergency flow from Internal Outfalls 001 and 005. • Combined Wastewater to the Cape Fear (Outfall 008). This outfall will discharge combined flows of treated wastewater from the two on-site treatment facilities, and the episodic emergency flow from Internal Outfall 008A. • 1963/1970 Ash Basins (Internal Outfall 008A). This outfall is designated as an emergency discharge only and will consist of ash basin comingled decanting wastewater and storm water. This is limited to discharging excess wastewater above the available treatment plant capacity during an eminent threat of 1963/1970 Ash Basin overflow. • Seep (Outfall 009) to Shaddox Creek. This outfall will discharge flow from a designated seep from the East Ash Basin. • Seep (Outfall 010A, 010B) to unnamed tributary to Cape Fear River. These outfalls will discharge flows from designated seeps from the East Ash Basin. • Seep (Outfalls 011A, 011B, 011CD, 011D) to Cape Fear River. These outfalls will discharge flows from designated seeps from the 1963/1970 Ash Basin. 2. Discharges are to the Cape Fear River, Shaddox Creek, and unnamed tributaries to the Cape Fear River, and are classified as WS -1V waters in the Cape Fear River Basin. Page 2 of 42 Permit NC0003433 Part I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Internal Outfall 001 [ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge on an emergency basis excess combined decanting (decanting is the free water above the settled ash layer that does not involve mechanical disturbance of the ash) wastewater and storm water to mitigate an eminent West Ash Basin overflow to Outfall 007. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS Monthly Daily Measurement Sample Sample CHARACTERISTICS Average Maximum Frequency 2 Type Location 3 Flow Daily during Pump Logs, meters, or Effluent Episodic Event estimate pH 6.0 < pH < 9.0 S.U. Weekly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Weekly Weekly Grab Effluent Effluent Oil and Grease 15.0 mg/L 1 20.0 mg/L Grab Notes 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. During a discharge event, the flow shall be reported daily and the TSS, pH, Oil & Grease shall be monitored and reported weekly including at least once during a discharge event for an event duration of less than a week. 3. Effluent sampling shall be conducted on effluent from the West Ash Basin discharge prior to mixing with any other waste stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. c. There shall be no discharge of polychlorinated biphenyls. Page 3 of 42 Permit NC0003433 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Internal Outfall 005 [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge on an emergency basis excess combined decanting (decanting is the free water above the settled ash layer that does not involve mechanical disturbance of the ash) wastewater and storm water to mitigate an eminent East Ash Basin overflow to Outfall 007. Such discharges shall be limited and monitored 1 by the Permittee as specified below: Notes 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. During a discharge event, the flow shall be reported daily and the TSS, pH, Oil & Grease shall be monitored and reported weekly including at least once during a discharge event for an event duration of less than a week. 3. Effluent sampling shall be conducted on effluent from the East Ash Basin discharge prior to mixing with any other waste stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. c. There shall be no discharge of polychlorinated biphenyls. Page 4 of 42 1 LIMITS MONITORING REQUIREMENTS EFFLUENT Monthly Daily Measurement Sample Sample CHARACTERISTICS Average Maximum Frequency 2 Type Location s Daily during Pump Logs, Flow Episodic Event meters, or Effluent estimate pH 6.0 < pH < 9.0 S.U. Weekly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L I Weekly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L 1 Weekly Grab Effluent Notes 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. During a discharge event, the flow shall be reported daily and the TSS, pH, Oil & Grease shall be monitored and reported weekly including at least once during a discharge event for an event duration of less than a week. 3. Effluent sampling shall be conducted on effluent from the East Ash Basin discharge prior to mixing with any other waste stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. c. There shall be no discharge of polychlorinated biphenyls. Page 4 of 42 Permit NC0003433 A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 007 [ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and until expiration, the Permittee is authorized to discharge from Outfall 007 'the facility's effluent channel collected seep discharges, collected stormwater, and emergency episodic discharge from Internal Outfalls 001 and 005. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Fre uenc� 2 Sample Type Sample Location Flow Monthly/Quarterly Instantaneous Effluent PH 6.0:5 pH < 9.0 S.U. Monthly/Quarterly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent Total Aluminum, mg/L Monthly/Quarterly Grab Effluent Total Arsenic 10.0 gg/L 10.0 µg/L Monthly/Quarterly Grab Effluent Total Barium, mg/L Monthly/Quarterly Grab Effluent Total Cadmium 3 1.7 gg/L 10.7 µg/L Monthly/Quarterly Grab Effluent Total Chromium, gg/L Monthly/Quarterly Grab Effluent Total Copper 25.5 µg/L 38.3 gg/L Monthly/Quarterly Grab Effluent Total Iron, mg/L Monthly/Quarterly Grab Effluent Total Lead, gg/L Monthly/Quarterly Grab Effluent Total Manganese, µg/L Monthly/Quarterly Grab Effluent Total Mercury, ng/L 4 Monthly/Quarterly Grab Effluent Total Molybdenum 160 gg/L 160 pg/L Monthly/Quarterly Grab Effluent Total Nickel 25.0 gg/L 25.0 gg/L Monthly/Quarterly Grab Effluent Total Selenium,gg/L Monthly/Quarterly Grab Effluent Total Thallium 0.24 µg/L 0.24 µg/L Monthly/Quarterly Grab Effluent Total Zinc, pg/L Monthly/Quarterly Grab Effluent Chlorides, mg/L Monthly/Quarterly Grab Effluent Fluoride, mg/L Monthly/Quarterly Grab Effluent Sulfates 250 mg/L 250 mg/L Monthly/Quarterly Grab Effluent Total Dissolved Solids, mg/L Monthly/Quarterly Grab Effluent Total Hardness, mg/L Monthly/Quarterly Grab Effluent Nitrate/Nitrite as N, mg/L Monthly/Quarterly Grab Effluent Temperature, °C Monthly/Quarterly Grab Effluent Conductivity, µmho/cm Monthly/Quarterly Grab Effluent Total Kjeldahl Nitrogen, mg/L Total Nitrogen, mg/L 5 Quarterly Grab Effluent Quarterly Grab Effluent Total Phosphorus, mg/L Quarterly Grab Effluent Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). Page 5 of 42 Permit NCO003433 (Continued A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) 2. The facility shall conduct monthly sampling from the effective date of this permit. After one year from the effective date of this permit the monitoring frequency will be reduced to quarterly. 3. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 µg/L. 4. The facility shall use EPA method 1631 E. 5. Total Nitrogen = Total Kjeldahl Nitrogen + Nitrate/Nitrite as N. b. If the facility is unable to obtain a sample due to no flow occurring during the measurement frequency period, then "no flow" shall be reported on the DMR as stated in Section D of the standard conditions and 40 CFR 122.41 (j). c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. Page 6 of 42 Pemiit NC0003433 A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 008 (decanting) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and lasting until commencing of dewatering (dewatering is the removal of an ash basin interstitial water), and expiration, the Permittee is authorized to discharge from Outfall 008 the treated decanting (decanting is the removal of the free water above the settled ash layer in an ash basin that does not involve mechanical disturbance of the ash) wastewater from the combined East and West Treatment Systems discharge, and episodic emergency discharge from internal Outfall 008A. Such discharges shall be limited and monitored' by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Fre uency Sample Type Sample Location z Flow 1.93 MGD Daily Continuous Effluent PH 3 6.0 < pH < 9.0 S.U. Monthly Grab Effluent Total Suspended Solids' 30.0 mg/L 100.0 mg/L 20.0 mg/L Monthly Monthly Composite Composite Effluent Effluent Oil and Grease 15.0 mg/L Total Arsenic 10.0 gg/L 10.0 gg/L Monthly Composite Effluent Total Copper 7.9 gg/L 10.5 gg/L Monthly Composite Effluent Total Mercury 5 12 ng/L, annual average Monthly Grab Effluent Total Molybdenum 160 µg/L _25.0 160 gg/L Monthly Composite Effluent Total Nickel gg/L 25.0 gg/L Monthly Composite Effluent Total Selenium _ 5.0 gg/L 56.0 gg/L Monthly Composite Effluent Total Thallium 0.24 gg/L 0.24 gg/L Monthly Composite Effluent Total Zinc 125.7 gg/L 125.7 gg/L Monthly Composite Composite Effluent Effluent Fluoride 1.8 mg/L 250 mg/L 1.8 mg/L Monthly Sulfates 250 mg/L Monthly Monthly Monthly Composite Effluent Turbidity 6, NTU Grab Effluent Turbidity 6, NTU Grab Composite Upstream Effluent Total Hardness, mg/L Monthly Monthly MonthlyComposite Total Hardness, mg/L Grab Upstream Total Barium, mg/L Effluent Total Cadmium, gg/L' Monthly _ Composite Effluent Chlorides, mg/L Monthly Composite Effluent Nitrate/Nitrite as N, mg/L Monthly Composite Effluent Chronic Toxicity 8 Monthly Composite Effluent Total Kjeldahl Nitrogen, mg/L Quarterly Composite Effluent Total Nitrogen, mg/L 9 Quarterly Composite Effluent Total Phosphorus, mg/L Quarterly Composite Effluent Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. Effluent = comingled sample of both treatment facilities' treated wastewater and episodic emergency outfall 008A wastewater. Upstream = minimum 50 ft upstream from discharge into Cape Fear River and cannot be part of any coalition monitoring wavier. Page 7 of 42 Permit NC0003433 (Continued A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) 3. The facility shall continuously monitor pH when the decanting process commences and the decanting pump shall be shutoff automatically when the 15 minutes running average pH falls below 6.1 standard units or. rises above 8.9 standards units. Pumping will be allowed to continue if interruption might result in a dam failure or damage. The continuous pH monitoring is only required when the pumps are employed. 4. The facility shall continuously monitor TSS concentration when the decanting process commences and the pump shall be shutoff automatically when the 15 minutes running average exceeds 50 mg/L. Pumping will be allowed to continue if interruption might result in a dam failure or damage. The continuous TSS monitoring is only required when the pumps are employed. 5. The facility shall use EPA method 1631 E. 6. The net turbidity shall not exceed 50 NTU using a grab sample and measured by the difference between the effluent turbidity and the background turbidity. The sample for the background turbidity shall be taken at point in the receiving waterbody upstream of the discharge location, and the background turbidity and the effluent turbidity samples shall be taken within the same 24 hour period. NTU - Nephelometric Turbidity Unit. 7. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 µg/L. 8. Chronic Toxicity (Ceriodaphnia dubia) at 90%; See Special Condition A. (18.). 9. Total Nitrogen = Total Kjeldahl Nitrogen + Nitrate/Nitrite as N. b. The facility shall treat the decanting wastewater discharged from the ash basins by the physical -chemical treatment facilities. c. The facility shall submit written notification to the DWR Complex NPDES Permitting Unit and the DWR Raleigh Regional Office of the intent to begin the initial ash basin decanting activity seven calendar days prior to commencing the initial decanting. d. The facility is allowed to drawdown the wastewater in the ash basin to no less than three feet above the ash. e. The level of wastewater in the ash basin shall not be lowered more than 1 ft per week, unless approved by the DEQ Dam Safety Program. f. The facility shall use a floating pump station with free water skimmed from the ash basin wastewater surface using an adjustable weir. g. The limits and conditions in Section A. (5.) of this permit apply immediately once the wastewater in any ash basin is lowered below the three feet trigger level for commencing dewatering. h. There shall be no discharge of floating solids or visible foam in other than trace amounts. i. There shall be no discharge of polychlorinated biphenyls. Page 8 of 42 Permit NC0003433 A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Outfall 008 (dewatering) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the commencing date of dewatering (dewatering is the removal of an ash basin interstitial water), and until expiration, the Permittee is authorized to discharge from Outfall 008 the treated decanting/dewatering wastewater from the combined East and West Treatment Systems discharge, and episodic emergency discharge from Internal Outfall 008A. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Sample Type Fre uencv Sample Location s Flow 1.93 MGD Daily Continuous Effluent pH 3 6.0 < pH < 9.0 S.U. Weekly Grab Effluent Total Suspended Solids 4 30.0 mg/L 100.0 mg/L Weekly Composite Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Composite Effluent Total Arsenic 10.0 gg/L 10.0 gg/L Weekly Composite Effluent Total Barium 1.0 mg/L 1.0 mg/L Weekly Composite Effluent Total Chromium III 117.7 pg/L 905.1 pg/L Weekly Calculate 5 Effluent Total Chromium VI 11.0 gg/L 16.0 pg/L Weekly Composite Effluent Total Chromium, gg/L Weekly Composite Effluent Total Copper 7.9 pg/L 10.5 gg/L Weekly Composite Effluent Total Lead 2.9 µg/L 75.5 gg/L Weekly Composite Effluent Total Mercury 6 12 ng/L, annual average Weekly Grab . Effluent Total Molybdenum 160 gg/L 160 gg/L Weekly Composite Effluent Total Nickel 25.0 gg/L 25.0 gg/L Weekly Composite Effluent Total Selenium 5.0 pg/L 56.0 µg/L Weekly Composite Effluent Total Thallium 0.24 pg/L 0.24 gg/L Weekly Composite Effluent Total Zinc 125.7 µg/L 125.7 µg/L Weekly Composite Effluent Fluoride 1.8 mg/L 1.8 mg/L Weekly Composite Effluent Sulfates 250 mg/L 250 mg/L Weekly Composite Effluent Turbidity 7, NTU Weekly Grab Effluent Turbidity 7, NTU Weekly Grab Upstream Total Hardness, mg/L Weekly Composite Effluent Total Hardness, mg/L Weekly Grab Upstream Total Antimony, gg/L Weekly Composite Effluent Total Cadmium, gg/L $ Weekly Composite Effluent Chlorides, mg/L Weekly Composite Effluent Nitrate/Nitrite as N, mg/L Weekly Composite Effluent Chronic Toxicity 9 Monthly Composite Effluent Total Kjeldahl Nitrogen, mg/L Total Nitrogen, mg/L io _ Total Phosphorus, mg/L Quarterly Composite Effluent Quarterly Composite Effluent Quarterly Composite Effluent Page 9 of 42 Permit NC0003433 (Continued A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. Effluent = comingled sample of both treatment facilities' treated wastewater and episodic emergency outfall 008A wastewater. Upstream = minimum 50 ft upstream from discharge into Cape Fear River and shall not be part of any coalition monitoring wavier. 3. The facility shall continuously monitor pH when the decanting process commences and the decanting pump shall be shutoff automatically when the 15 minutes running average pH falls below 6.1 standard units or rises above 8.9 standards units. Pumping will be allowed to continue if interruption might result in a dam failure or damage. The continuous pH monitoring is only required when the pumps are employed. 4. The facility shall continuously monitor TSS concentration when the decanting process commences and the pump shall be shutoff automatically when the 15 minutes running average exceeds 50 mg/L. Pumping will be allowed to continue if interruption might result in a dam failure or damage. The continuous TSS monitoring is only required when the pumps are employed. 5. Total Chromium III = Total Chromium — Total Chromium VI. 6. The facility shall use EPA method 1631 E. 7. The net turbidity shall not exceed 50 NTU using a grab sample and measured by the difference between the effluent turbidity and the background turbidity. The sample for the background turbidity shall be taken at point in the receiving waterbody upstream of the discharge location, and the background turbidity and the effluent turbidity samples shall be taken within the same 24 hour period. NTU - Nephelometric Turbidity Unit. 8. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 µg/L. 9. Chronic Toxicity (Ceriodaphnia dubia) at 90%; See Special Condition A. (18.). 10. Total Nitrogen = Total Kjeldahl Nitrogen + Nitrate/Nitrite as N. b. The facility shall treat the decanting/dewatering wastewater discharged from the ash basins by the physical -chemical treatment facilities. c. The facility shall submit written notification to the DWR Complex NPDES Permitting Unit and the DWR Raleigh Regional Office of the intent to begin the initial ash basin dewatering activity seven calendar days prior to commencing the dewatering. d. The level of wastewater in the ash basin shall not be lowered more than 1 ft per week, unless approved by the DEQ Dam Safety Program. e. There shall be no discharge of floating solids or visible foam in other than trace amounts. E There shall be no discharge of polychlorinated biphenyls. Page 10 of 42 Permit NC0003433 A. (6.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Outfall 008 [ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the commencing date of the on-site groundwater wastewater addition to the East and West treatment facilities ash basin decanting/dewatering influents, and until expiration, the Permittee is authorized to discharge from Outfall 008 the treated decanting/dewatering/groundwater wastewater from the combined East and West Treatment Systems discharge, and episodic emergency discharge from Internal Outfall 008A. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Measurement Maximum Frequency Sample Type Sample Location 2 Flow 1.93 MGD Daily Continuous Effluent pH 3 6.0:S pH:S 9.0 S.U. Weekly Grab Effluent Total Suspended Solids' 30.0 mg/L 100.0 mg/L Weekly Composite Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Composite Effluent Total Antimony 5.6 gg/L 5.6 µg/L Weekly Composite Effluent Total Arsenic 10.0 gg/L 10.0 gg/L Weekly Composite Effluent Total Barium 1.0 mg/L 1.0 mg/L Weekly Composite Effluent Total Cadmium' 0.6 gg/L 3.2 gg/L Weekly Composite Effluent Total Chromium III 117.7 gg/L 905.1 gg/L Weekly Calculate 6 Effluent Total Chromium VI 11.0 gg/L 16.0 gg/L Weekly Composite Effluent Total Chromium, gg/L Weekly Composite Effluent Total Copper 7.9 gg/L 10.5 gg/L Weekly Composite Effluent Total Lead 2.9 gg/L 75.5 gg/L Weekly Composite Effluent Total Mercury 7 12 ng/L, annual average Weekly Grab Effluent Total Molybdenum 160 gg/L 160 gg/L Weekly Composite Effluent Total Nickel 25.0 gg/L 25.0 gg/L Weekly Composite Effluent Total Selenium 5.0 gg/L 56.0 gg/L Weekly Composite Effluent Total Thallium 0.24 gg/L 0.24 gg/L Weekly Composite Effluent Total Zinc 125.7 gg/L 125.7 gg/L Weekly Composite Effluent Chlorides 250 mg/L 250 mg/L Weekly Composite Effluent Fluoride 1.8 mg/L 1.8 mg/L Weekly Composite Effluent Sulfates 250 mg/L 250 mg/L Weekly Composite Effluent Turbidity 8, NTU Weekly Grab Effluent Turbidity ', NTU Weekly Grab Upstream Total Hardness, mg/L Weekly Composite Effluent Total Hardness, mg/L Weekly Grab Upstream Nitrate/Nitrite as N, mg/L Weekly Composite Effluent Chronic Toxicity 9 Monthly Composite Effluent Total Aluminum, mg/L Monthly Composite Effluent Total Manganese, gg/L Monthly Composite Effluent Total Dissolved Solids, mg/L Monthly Composite Effluent Total Kjeldahl Nitrogen, mg/L Quarterly Composite Effluent Total Nitrogen, mg/L 10 _ _ Quarterly Quarterly Composite Effluent Total Phosphorus, mg/L Composite Effluent Page 11 of 42 Permit NC0003433 (Continued A. (6.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. Effluent = comingled sample of both treatment facilities' treated wastewater and episodic emergency outfall 008A wastewater. Upstream = minimum 50 ft upstream from discharge into Cape Fear River and shall not be part of any of any coalition monitoring wavier. 3. The facility shall continuously monitor pH when the decanting process commences and the decanting pump shall be shutoff automatically when the 15 minutes running average pH falls below 6.1 standard units or rises above 8.9 standards units. Pumping will be allowed to continue if interruption might result in a dam failure or damage. The continuous pH monitoring is only required when the pumps are employed. 4. The facility shall continuously monitor TSS concentration when the decanting process commences and the pump shall be shutoff automatically when the 15 minutes running average exceeds 50 mg/L. Pumping will be allowed to continue if interruption might result in a dam failure or damage. The continuous TSS monitoring is only required when the pumps are employed. 5. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 µg/L 6. Total Chromium III = Total Chromium — Total Chromium VI. 7. The facility shall use EPA method 1631 E. 8. The net turbidity shall not exceed 50 NTU using a grab sample and measured by the difference between the effluent turbidity and the background turbidity. The sample for the background turbidity shall be taken at point in the receiving waterbody upstream of the discharge location, and the background turbidity and the effluent turbidity samples shall be taken within the same 24 hour period. NTU - Nephelometric Turbidity Unit. 9. Chronic Toxicity (Ceriodaphnia dubia) at 90%; See Special Condition A. (18.). 10. Total Nitrogen = Total Kjeldahl Nitrogen + Nitrate/Nitrite as N. b. The facility shall treat the decanting/dewatering wastewater discharged from the ash basins by the physical -chemical treatment facilities. c. The facility shall submit written notification to the DWR Complex NPDES Permitting Unit and the DWR Raleigh Regional Office of the intent to begin the addition of on-site groundwater wastewater to the East and West treatment facilities' influent in conjunction with ash basin decanting/dewatering wastewater, seven calendar days prior to commencing the addition. See Special Condition A. (25.) for further requirements. d. The level of wastewater in the ash basin shall not be lowered more than 1 ft per week, unless approved by the DEQ Dam Safety Program. e. There shall be no discharge of floating solids or visible foam in other than trace amounts. f. There shall be no discharge of polychlorinated biphenyls. Page 12 of 42 Permit NC0003433 A. (7.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Outfall 008 [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning after the completion/termination of all ash basin decanting/dewatering activities, and the continuation of on-site groundwater wastewater addition to the East and West treatment facilities' influent, and until expiration, the Permittee is authorized to discharge from Outfall 008 the treated groundwater wastewater from the combined East and the Treatment Systems discharge. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Sample Type Fre uenq Sample Location 2 Flow Weekly Continuous Effluent pH 6.0 < pH < 9.0 S.U. Weekly Grab Effluent Total Suspended Solids 30.0 mg/L 30.0 mg/L Weekly Composite Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Composite Effluent Total Antimony 5.6 µg/L 5..6 gg/L Weekly Composite Effluent Total Arsenic 10.0 gg/L 10.0 gg/L Weekly Composite Effluent Total Barium 1.0 mg/L 1.0 mg/L Weekly Composite Effluent Total Cadmium 3 0.6 pg/L 3.2 pg/L Weekly Composite Effluent Total Chromium III 117.7 gg/L 905.1 pg/L Weekly Calculate 4 Effluent Total Chromium VI 11.0 pg/L 16.0 pg/L Weekly Composite Effluent Total Chromium, Fig/L Weekly Composite Effluent Total Copper 7.9 gg/L 10.5 gg/L Weekly Composite Effluent Total Lead 2.9 µg/L 1 75.5 gg/L Weekly Composite Effluent Total Mercury 5 12 ng/L, annual average Monthly Grab Effluent Total Molybdenum 160 gg/L 160 gg/L Weekly Composite Effluent Total Nickel 25.0 µg/L 25.0 pg/L Weekly Composite Effluent Total Selenium 5.0 pg/L 56.0 pg/L Weekly Composite Effluent Total Thallium 0.24 pg/L 0.24 µg/L Weekly Composite Effluent Total Zinc 125.7 µg/L 125.7 pg/L Weekly Composite Effluent Chlorides 250 mg/L 250 mg/L Weekly Composite Effluent Fluoride 1.8 mg/L 1.8 mg/L Weekly Composite Effluent Sulfates 250 mg/L 250 mg/L Weekly Composite Effluent Turbidity 6, NTU Weekly Grab Effluent Turbidity 6, NTU Weekly Grab Upstream Total Aluminum, mg/L Monthly Composite Effluent Total Manganese, pg/L Monthly Composite Effluent Total Dissolved Solids, mg/L Monthly Composite Effluent Total Hardness, mg/L Quarterly Composite Effluent Total Hardness, mg/L Quarterly Grab Upstream Nitrate/Nitrite as N, mg/L Quarterly Composite Effluent Chronic Toxicity' Quarterly Composite Effluent Total Kjeldahl Nitrogen, mg/L W Quarterly Composite Effluent Total Nitrogen, mg/L $ Quarterly Composite Effluent Total Phosphorus, mg/L Quarterly Composite Effluent Page 13 of 42 Permit NC0003433 (Continued A. (7.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. Effluent = comingled sample of both treatment facilities' treated wastewater. Upstream = minimum 50 ft upstream from discharge into Cape Fear River and shall not be part of any coalition monitoring wavier. 3. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 µg/L. 4. Total Chromium III = Total Chromium — Total Chromium VI. 5. The facility shall use EPA method 1631 E. 6. The net turbidity shall not exceed 50 NTU using a grab sample and measured by the difference between the effluent turbidity and the background turbidity. The sample for the background turbidity shall be taken at point in the receiving waterbody upstream of the discharge location, and the background turbidity and the effluent turbidity samples shall be taken within the same 24 hour period. NTU - Nephelometric Turbidity Unit. 7. Chronic Toxicity (Ceriodaphnia dubia) at 90% in February, May, August, and November; See Special Condition A. (19.). 8. Total Nitrogen = Total Kjeldahl Nitrogen + Nitrate/Nitrite as N. b. The facility shall submit written notification to the DWR Complex NPDES Permitting Unit and the DWR Raleigh Regional Office of the intent to continue or to commence on-site groundwater wastewater addition to the East and West treatment facilities' influent after the completion/termination of all ash basins decanting/dewatering activities, seven calendar days prior to completion and termination of all ash basin decanting/dewatering. If the intent is for commencing groundwater wastewater addition to the East and West treatment facilities influent, then see Special Condition A. (25.) for further requirements. c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. Page 14 of 42 Permit NC0003433 A. (8.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Outfall 008 [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning after the completion/termination of all ash basin decanting/dewatering activities, and the continuation of on-site groundwater wastewater addition to the East and West treatment facilities' influent, and the commencing date for on-site leachate wastewater addition to the East and West treatment facilities' influent, and until expiration, the Permittee is authorized to discharge from Outfall 008 the treated groundwater/leachate wastewater from the combined East and the West Treatment Systems discharge. Such discharges shall be limited and monitored' by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS Monthly Daily Average Maximum MONITORING REQUIREMENTS Measurement Fre uency Sample Type Sample Location 2 Flow Weekly Continuous Effluent Temperature, °C Weekly Grab Effluent pH 6.0::S pH:5 9.0 S.U. Weekly Grab Effluent Total Suspended Solids 30.0 mg/L 30.0 mg/L Weekly Composite Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Weekly Composite Composite Effluent Effluent Total Antimony 5.6 gg/L 5.6 µg/L Total Arsenic 10.0 gg/L 10.0 gg/L Weekly Composite Effluent Total Barium 1.0 mg/L 1.0 mg/L Weekly Composite Effluent Total Cadmium 3 0.6 gg/L 3.2 gg/L Weekly Composite Effluent Total Chromium III 117.7 gg/L 905.1 gg/L Weekly Calculate 4 Effluent Total Chromium VI 11.0 gg/L 16.0 gg/L Weekly Composite Effluent Total Chromium, gg/L Weekly Composite Effluent Total Copper 7.9 gg/L 10.5 gg/L Weekly Composite Effluent Total Lead 2.9 gg/L 75.5 gg/L Weekly Composite Effluent Total Mercury 5 12 ng/L, annual average Monthly Grab Effluent Total Molybdenum 160 gg/L 160 gg/L Weekly Composite Effluent Total Nickel 25.0 gg/L 25.0 gg/L Weekly Composite Effluent Total Selenium 5.0 gg/L 56.0 gg/L Weekly Composite Effluent Total Silver 6 0.06 gg/L 0.30 jg/L Weekly Composite Effluent Total Thallium 0.24 gg/L 0.24 gg/L Weekly Composite Effluent Total Zinc 125.7 gg/L 125.7 gg/L Weekly Composite Effluent Chlorides 250 mg/L 250 mg/L Weekly Composite Effluent Fluoride 1.8 mg/L 1.8 mg/L Weekly Composite Effluent Sulfates 250 mg/L 250 mg/L Weekly Composite Effluent Turbidity 7, NTU Weekly Grab Effluent Turbidity 7, NTU Weekly Grab Upstream Total Aluminum, mg/L Monthly Composite Effluent Total Manganese, gg/L Monthly Composite Effluent Total Dissolved Solids, mg/L Monthly Composite Effluent Conductivity, µmhos/cm Monthly Grab Effluent Total Hardness, mg/L Quarterly Composite Effluent Total Hardness, mg/L Quarterly Grab Upstream Nitrate/Nitrite as N, mg/L _ Quarterly Composite Effluent Page 15 of 42 Permit NC0003433 (Continued A. (8.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency Sample Type Sample Location 2 Chronic Toxicity 8 Quarterly Composite Effluent Total Kjeldahl Nitrogen, mg/L Quarterly Composite Effluent Total Nitrogen, mg/L 9 Quarterly Composite Effluent Total Phosphorus, mg/L Quarterly Composite f Effluent Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A (27.). 2. Effluent = comingled sample both treatment facilities' treated wastewater. Upstream = minimum 50 ft upstream from discharge into Cape Fear River and shall not be part of any coalition monitoring wavier. 3. Total Cadmium shall be measured to the Practical Quantitation Level of 0.5 µg/L. 4. Total Chromium III = Total Chromium — Total Chromium VI. 5. The facility shall use EPA method 1631 E. 6. Total Silver shall be measured to the Practical Quantitation Level of 1 µg/L. 7. The net turbidity shall not exceed 50 NTU using a grab sample and measured by the difference between the effluent turbidity and the background turbidity. The sample for the background turbidity shall be taken at point in the receiving waterbody upstream of the discharge location, and the background turbidity and the effluent turbidity samples shall be taken within the same 24 hour period. NTU - Nephelometric Turbidity Unit. 8. Chronic Toxicity (Ceriodaphnia dubia) at 90% in February, May, August, and November; See Special Condition A. (19.). 9. Total Nitrogen = Total Kjeldahl Nitrogen + Nitrate/Nitrite as N. b. The facility shall submit written notification to the DWR Complex NPDES Permitting Unit and the DWR Raleigh Regional Office on the intent to begin the addition of on-site leachate wastewater to the East and West treatment facilities influent consisting of groundwater wastewater after the completion/termination of all ash basin decanting/dewatering activities, seven calendar days prior to completion and termination of all ash basin decanting/dewatering activities and commencing of on-site leachate wastewater addition. See Special Condition A. (25.) for further requirements. c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. Page 16 of 42 Permit NC0003433 A. (9.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Internal Outfall 008A [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge from Internal Outfall 008A on an emergency basis the excess combined decanting (decanting is the free water above the settled ash layer that does not involve mechanical disturbance of the ash) wastewater and storm water to mitigate an eminent 1963/1970 Ash Basin overflow to Outfall 008. Such discharges shall be limited and monitored' by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS Monthly Daily Measurement SampleSample CHARACTERISTICS Average Maximum Fre uency a Ty )e Location s Daily during Pump Logs' Flow Episodic Event meters, or Effluent estimate pH 6.0 < pH < 9.0 S.U. Weekly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Weekly Weekly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Grab ,Effluent Notes 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. During a discharge event, the flow shall be reported daily and the TSS, pH, Oil & Grease shall be monitored and reported weekly including at least once during a discharge event for an event duration of less than a week. 3. Effluent sampling shall be conducted on effluent from the 1963/1970 Ash Basin discharge prior to mixing with any other waste stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. c. There shall be no discharge of polychlorinated biphenyls. Page 17 of 42 Permit NC0003433 A. (10.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 009 [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and until expiration, the Permittee is authorized to discharge from Outfall 009 - Seep Discharge. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency 2 Sample Type Sample Location Flow Monthly/Quarterly Pump log, estimate, meter Effluent pH 6.0 < pH:S 9.0 S.U. Monthly/Quarterly Grab �g Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent Total Aluminum, mg/L Monthly/Quarterly Grab Effluent Total Arsenic 10.0 gg/L 10.0 gg/L Monthly/Quarterly Grab Effluent Total Antimony, gg/L Monthly/Quarterly Grab Effluent Total Barium, mg/L Monthly/Quarterly Grab Effluent Total Cadmium' 1.7 gg/L 10.7 gg/L Monthly/Quarterly Grab Effluent Total Chromium VI 11.0 gg/L 16.0 gg/L Monthly/Quarterly Grab Effluent Total Chromium, gg/L Monthly/Quarterly Grab Effluent Total Copper 25.5 gg/L 38.3 gg/L Monthly/Quarterly Grab Effluent Total Iron, mg/L Monthly/Quarterly Grab Effluent Total Lead 13.6 gg/L 347.4 gg/L Monthly/Quarterly Grab Effluent Total Manganese, gg/L Monthly/Quarterly Grab Effluent Total Mercury, ng/L 4 Monthly/Quarterly Grab Effluent Total Molybdenum, gg/L Monthly/Quarterly Grab Effluent Total Nickel 25.0 gg/L 25.0 gg/L Monthly/Quarterly Grab Effluent Total Selenium 5.0 gg/L 56.0 gg/L Monthly/Quarterly Grab Effluent Total Thallium 0.24 gg/L 0.24 gg/L Monthly/Quarterly Grab Effluent _ Total Zinc, gg/L Monthly/Quarterly Grab Effluent Chlorides, mg/L Monthly/Quarterly Grab Effluent Sulfates 250 mg/L 250 mg/L Monthly/Quarterly Grab Total Dissolved Solids, mg/L Monthly/Quarterly Grab _Effluent Effluent Total Hardness, mg/L Monthly/Quarterly Grab Effluent Nitrate/Nitrite as N, mg/L Monthly/Quarterly Grab Effluent Temperature, °C Conductivity, µmho/cm Monthly/Quarterly Grab Effluent Monthly/Quarterly Grab Effluent Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. The facility shall conduct monthly sampling from the effective date of this permit. After one year from the effective date of this permit the monitoring frequency will be reduced to quarterly. 3. Total Cadmium shall be measured to a Practical Quantitation level of 0.5 gg/L. Page 18 of 42 Permit NC0003433 (Continued A. (10.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) 4. The facility shall use EPA method 1631 E. b. If the facility is unable to obtain a sample due to no flow occurring during the measurement frequency period, then "no flow" shall be reported on the DMR as stated in Section D of the standard conditions and 40 CFR 122.410). c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. Page 19 of 42 Permit NC0003433 A. (11.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 010A [15A NCAC 02B.0400 et seq., 02B.0500 et seq.] a. During the period beginning on the effective date of this permit and until expiration, the Permittee is authorized to discharge from Outfall 010A - Seep Discharge. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency 2 Sample Type Sample Location Flow Monthly/Quarterly Pump log, estimate, meter Effluent PH 6.0 < pH < 9.0 S.U. Monthly/Quarterly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent Total Aluminum, mg/L Monthly/Quarterly Grab Effluent Total Arsenic, gg/L Monthly/Quarterly Grab Effluent Total Barium, mg/L Monthly/Quarterly Grab Effluent Total Cadmium, gg/L 3 Monthly/Quarterly Grab Effluent Total Chromium, gg/L Monthly/Quarterly Grab Effluent Total Copper, gg/L Monthly/Quarterly Grab Effluent Total Iron, mg/L Monthly/Quarterly Grab Effluent Total Lead, gg/L Monthly/Quarterly Grab Effluent Total Manganese, gg/L Monthly/Quarterly Grab Effluent Total Mercury, ng/L a Monthly/Quarterly Grab Effluent Total Molybdenum, gg/L _....._...... --- ..... --- Monthly/Quarterly Grab Effluent Total Nickel, gg/L Monthly/Quarterly Grab Effluent Total Selenium, gg/L Monthly/Quarterly Monthly/Quarterly Grab Grab Effluent Effluent Total Thallium, gg/L Total Zinc, gg/L Monthly/Quarterly Grab Effluent Chlorides, mg/L Monthly/Quarterly Grab Effleunt Fluoride, mg/L Monthly/Quarterly Grab Effluent Sulfates 250 mg/L 250 mg/L Monthly/Quarterly Grab Effluent Total Dissolved Solids, mg/L Monthly/Quarterly Grab Effluent Total Hardness, mg/L Monthly/Quarterly Grab Effluent Nitrate/Nitrite as N, mg/L Monthly/Quarterly Grab Effluent Temperature, °C Monthly/Quarterly Grab Effluent Conductivity, µmho/cm Monthly/Quarterly Grab Effluent Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. The facility shall conduct monthly sampling from the effective date of this permit. After one year from the effective date of this permit the monitoring frequency will be reduced to quarterly. 3. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 gg/L. 4. The facility shall use EPA method 1631 E. Page 20 of 42 Permit NC0003433 (Continued A. (11.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) b. If the facility is unable to obtain a sample due to no flow occurring during the measurement frequency period, then "no flow" shall be reported on the DMR as stated in Section D of the standard conditions and 40 CFR 122.41 (j). c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. A. (12.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 010B [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and until expiration, the Permittee is authorized to discharge from Outfall 010B - Seep Discharge. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS _ Monthly Average Daily Maximum Measurement 2 Sample Type Sample Location Flow ___Frequency Monthly/Quarterly Pump log, estimate, meter Effluent pH 6.0:5 pH:5 9.0 S.U. Monthly/Quarterly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent Total Aluminum, mg/L_ Monthly/Quarterly i Grab Effluent Total Arsenic _ 10.0 µg/L 10.0_ gg/L Monthly/Quarterly Grab Effluent Total Barium, mg/L Monthly/Quarterly Grab Effluent Total Cadmium, gg/L 3 Monthly/Quarterly Grab Effluent Total Chromium, µg/LMonthly/Quarterly Grab Effluent Total Copper — 7.9 µg/L 10.5 µg/L Monthly/Quarterly Grab Effluent Total Iron, mg/L Monthly/Quarterly Grab Effluent Total Lead 2.9 µg/L 75.5 ttg/L Monthly/Quarterly Grab Effluent Total Manganese, µg/L Monthly/Quarterly Grab Effluent Total Mercury 4 12 ng/L, annual average Monthly/Quarterly Grab Effluent Total Molybdenum, µg/L Monthly/Quarterly Grab Effluent Total Nickel, µg/L Monthly/Quarterly Grab Effluent Total Selenium, µg/L Monthly/Quarterly Grab Effluent Total Thallium, gg/L Monthly/Quarterly Grab Effluent Total Zinc, pg/L Monthly/Quarterly Grab Effluent Chlorides, mg/L Monthly/Quarterly Grab Effluent Sulfates, mg/L Monthly/Quarterly Grab Effluent Total Dissolved Solids, mg/L _ Monthly/Quarterly Grab Effluent Total Hardness, mg/L Monthly/Quarterly Grab Effluent Nitrate/Nitrite as N, mg/L Monthly/Quarterly Grab Effluent Temperature, °C Monthly/Quarterly Monthly/Quarterly Grab Effluent Conductivity, µmho/cm Grab Effluent Page 21 of 42 Permit NCO003433 (Continued A. (12.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. The facility shall conduct monthly sampling from the effective date of this permit. After one year from the effective date of this permit the monitoring frequency will be reduced to quarterly. 3. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 µg/L. 4. The facility shall use EPA method 1631E. b. If the facility is unable to obtain a sample due to no flow occurring during the measurement frequency period, then "no flow" shall be reported on the DMR as stated in Section D of the standard conditions and 40 CFR 122.41 (j). c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. Page 22 of 42 Permit NC0003433 A. (13.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 011A [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and until expiration, the Permittee is authorized to discharge from Outfall 011A — Seep Discharge. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Fre uencv 2 Sample Type Sample Location Flow _ Monthly/Quarterly Pump log, estimate, meter Effluent pH 6.0 < PH:5 9.0 S.U. Monthly/Quarterly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent Total Aluminum, mg/L Monthly/Quarterly Grab Effluent Total Arsenic 10.0 µg/L 10.0 gg/L Monthly/Quarterly Grab Effluent Total Barium, mg/L Monthly/Quarterly Grab Effluent Total Cadmium, gg/L 3 Monthly/Quarterly Grab Effluent Total Chromium, gg/L Monthly/Quarterly Grab Effluent Total Copper, µg/L Monthly/Quarterly Grab Effluent Total Iron, mg/L Monthly/Quarterly Grab Effluent Total Lead, gg/L Monthly/Quarterly Grab Effluent Total Manganese, gg/L Monthly/Quarterly Monthly/Quarterly Grab Grab Effluent Effluent Total Mercury, ng/L 4 Total Molybdenum 160 gg/L 160 gg/L Monthly/Quarterly Grab Effluent Total Nickel, gg/L Monthly/Quarterly Grab Effluent Total Selenium, µg/L Monthly/Quarterly Grab Effluent Total Thallium 0.24 gg/L 0.24 gg/L Monthly/Quarterly Grab Effluent Total Zinc, pg/L Monthly/Quarterly Grab Effluent Chlorides, mg/L Monthly/Quarterly Grab Effluent Fluoride, mg/L Monthly/Quarterly Grab Effluent Sulfates 250 mg/L 250 mg/L Monthly/Quarterly Grab Effluent Total Dissolved Solids, mg/L Monthly/Quarterly Grab Effluent Total Hardness, mg/L Monthly/Quarterly Grab Effluent Nitrate/Nitrite as N, mg/L Temperature, °C Monthly/Quarterly Grab Effluent Monthly/Quarterly Grab Effluent Conductivity, µmho/cm Monthly/Quarterly Grab Effluent Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. The facility shall conduct monthly sampling from the effective date of this permit. After one year from the effective date of this permit the monitoring frequency will be reduced to quarterly. 3. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 gg/L. 4. The facility shall use EPA method 1631 E. Page 23 of 42 Permit NC0003433 (Continued A. (13.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) b. If the facility is unable to obtain a sample due to no flow occurring during the measurement frequency period, then "no flow" shall be reported on the DMR as stated in Section D of the standard conditions and 40 CFR 122.41 (j). c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. Page 24 of 42 Permit NC0003433 A. (14.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 01113 [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and until expiration, the Permittee is authorized to discharge from Outfall 011B — Seep Discharge. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Fre uencw 2 Sample Type Sample Location Flow Monthly/Quarterly Pump log, estimate, meter Effluent PH 6.0 < pH < 9.0 S.U. Monthly/Quarterly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent Total Aluminum, mg/L Monthly/Quarterly Grab Effluent Total Arsenic 10.0 pg/L 10.0 pg/L Monthly/Quarterly Grab Effluent Total Barium, mg/L Monthly/Quarterly Grab Effluent Total Cadmium, pg/L 3 Monthly/Quarterly Grab Effluent Total Chromium, pg/L Monthly/Quarterly Grab Effluent Total Copper, pg/L Monthly/Quarterly Grab Effluent Total Iron, mg/L Monthly/Quarterly Grab Effluent Total Lead, pg/L Monthly/Quarterly Grab Effluent Total Manganese, pg/L Monthly/Quarterly Grab Effluent Total Mercury 4 12 ng/L, annual average Monthly/Quarterly Grab Effluent Total Molybdenum 160 pg/L 160 pg/L Monthly/Quarterly Grab Effluent Total Nickel 25.0 pg/L 25.0 pg/L Monthly/Quarterly Grab Effluent Total Selenium, pg/L Monthly/Quarterly Grab Effluent Total Thallium 0.24 pg/L 0.24 pg/L Monthly/Quarterly Grab Effluent Total Zinc 403.4 pg/L 403.4 pg/L Monthly/Quarterly Grab Effluent Chlorides, mg/L Monthly/Quarterly Grab Effluent Fluoride 1.8 mg/L 1.8 mg/L Monthly/Quarterly Grab Effluent Sulfates 250 mg/L 250 mg/L Monthly/Quarterly Grab Effluent Total Dissolved Solids, mg/L Monthly/Quarterly Grab Effluent Total Hardness, mg/L Monthly/Quarterly Grab Effluent Nitrate/Nitrite as N, mg/L Monthly/Quarterly Grab Effluent Temperature, °C Monthly/Quarterly Grab _ Effluent Conductivity, µmho/cm Monthly/Quarterly Grab Effluent Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. The facility shall conduct monthly sampling from the effective date of this permit. After one year from the effective date of this permit the monitoring frequency will be reduced to quarterly. 3. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 pg/L. 4. The facility shall use EPA method 1631 E. Page 25 of 42 Permit NCO003433 (Continued A. (14.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) b. If the facility is unable to obtain a sample due to no flow occurring during the measurement frequency period, then "no flow" shall be reported on the DMR as stated in Section D of the standard conditions and 40 CFR 122.410). c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. Page 26 of 42 Permit NC0003433 A. (15.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 011C [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and until expiration, the Permittee is authorized to discharge from Outfall 011C — Seep Discharge. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency 2 Sample Type Sample Location Flow Monthly/Quarterly Pump log, estimate, meter Effluent pH 6.0 < pH < 9.0 S.U. Monthly/Quarterly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent Total Aluminum, mg/L r.. Monthly/Quarterly Grab Effluent _ Total Arsenic 10.0 µg/L 10.0 gg/L Monthly/Quarterly Grab Effluent Total Barium, mg/L Monthly/Quarterly Grab Effluent Total Cadmium, gg/L 3 Monthly/Quarterly Grab Effluent Total Chromium, gg/L Monthly/Quarterly Grab Effluent Total Copper, jig/l, Monthly/Quarterly Grab Effluent Total Iron, mg/L Monthly/Quarterly Grab Effluent Total Lead, gg/L Monthly/Quarterly Grab Effluent Total Manganese, µg/L Monthly/Quarterly Grab Effluent Total Mercury, ng/L 4 Monthly/Quarterly Grab Effluent Total Molybdenum, gg/L Monthly/Quarterly Grab Effluent Total Nickel 25.0 gg/L 25.0 µg/L Monthly/Quarterly Grab Effluent Total Selenium, µg/L Monthly/Quarterly Grab Effluent Total Thallium 0.24 gg/L 0.24 pg/L Monthly/Quarterly Grab Total Zinc 403.4 gg/L 403.4 pg/L Monthly/Quarterly Grab __Effluent Effluent Chlorides, mg/L Monthly/Quarterly Grab Effluent Fluoride, mg/L 1.8 mg/L 1.8 mg/L Monthly/Quarterly Grab Effluent Sulfates 250 mg/L 250 mg/L Monthly/Quarterly Grab Effluent Total Dissolved Solids, mg/L Monthly/Quarterly Grab Effluent Total Hardness, mg/L Monthly/Quarterly Grab Effluent Nitrate/Nitrite as N, mg/L - Monthly/Quarterly Grab Effluent Temperature, °C Monthly/Quarterly Monthly/Quarterly Grab Grab Effluent Effluent Conductivity, µmho/cm Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. The facility shall conduct monthly sampling from the effective date of this permit. After one year from the effective date of this permit the monitoring frequency will be reduced to quarterly. 3. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 gg/L. 4. The facility shall use EPA method 1631 E. Page 27 of 42 Permit NC0003433 (Continued A. (15.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) b. If the facility is unable to obtain a sample due to no flow occurring during the measurement frequency period, then "no flow" shall be reported on the DMR as stated in Section D of the standard conditions and 40 CFR 122.41 (j). c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. Page 28 of 42 Permit NC0003433 A. (16.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 011D [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date of this permit and until expiration, the Permittee is authorized to discharge from Outfall 011D — Seep Discharge. Such discharges shall be limited and monitored' by the Permittee as specified below - EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency 2 Sample Type Sample Location Flow Monthly/Quarterly Pump log, estimate, meter Effluent PH 6.0< pH < 9.0 S.U. Monthly/Quarterly Grab Effluent Total Suspended Solids 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent Total Aluminum, mg/L Monthly/Quarterly Grab Effluent Total Arsenic, gg/L Monthly/Quarterly Grab Effluent Total Barium, mg/L Monthly/Quarterly Grab Effluent Total Cadmium, gg/L' Monthly/Quarterly Grab Effluent Total Chromium, gg/L Monthly/Quarterly Grab Effluent Total Copper, gg/L Monthly/Quarterly Grab Effluent Total Iron, mg/L Monthly/Quarterly Grab Effluent Total Lead, gg/L 13.5 gg/L 347.5 gg/L Monthly/Quarterly Grab Effluent Total Manganese, µg/L Monthly/Quarterly Grab Effluent Total Mercury 4 12 ng/L, annual average Monthly/Quarterly Grab Effluent Total Molybdenum Monthly/Quarterly Grab Effluent Total Nickel 25.0 µg/L 25.0 µg/L Monthly/Quarterly Grab Effluent Total Selenium, µg/L Monthly/Quarterly Grab Effluent Total Thallium Monthly/Quarterly Grab Effluent Total Zinc 403.4 µg/L 403.4 µg/L Monthly/Quarterly Grab Effluent Chlorides, mg/L Monthly/Quarterly Grab Effluent Sulfates 250 mg/L 250 mg/L Monthly/Quarterly Grab Effluent Total Dissolved Solids, mg/L Monthly/Quarterly Grab Effluent Total Hardness, mg/L Monthly/Quarterly Grab Effluent Nitrate/Nitrite as N, mg/L Monthly/Quarterly Grab Effluent Temperature, °C Monthly/Quarterly Grab Effluent Conductivity, µmho/cm Monthly/Quarterly Grab Effluent Notes: 1. Starting on December 21, 2016, begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR application system. Please See Special Condition A. (27.). 2. The facility shall conduct monthly sampling from the effective date of this permit. After one year from, the effective date of this permit the monitoring frequency will be reduced to quarterly. 3. Total Cadmium shall be measured to a Practical Quantitation Level of 0.5 gg/L. 4. The facility shall use EPA method 1631 E. Page 29 of 42 Permit NC0003433 (Continued A. (16.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS) b. If the facility is unable to obtain a sample due to no flow occurring during the measurement frequency period, then "no flow" shall be reported on the DMR as stated in Section D of the standard conditions and 40 CFR 122.41 (j). c. There shall be no discharge of floating solids or visible foam in other than trace amounts. d. There shall be no discharge of polychlorinated biphenyls. A. (17.) ADDITIONAL CONDITIONS AND DEFINITIONS The following special conditions are applicable to all outfalls regulated by this permit: a. Nothing contained in this permit shall be construed as a waiver by the Permittee of any right to a hearing it may have pursuant to State or Federal laws or regulations. b. The Permittee shall report all visible discharges of floating materials (such as an oil slick) to the Director when submitting DMRs. c. "Upset," means an exceptional incident in which there is an unintentional and temporary non- compliance with technology-based effluent limitations because of factors beyond the reasonable control of the Permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or improper operations. d. All flows shall be reported on monthly DMRs. Should no flow occur during a given month, the words "no flow" should be clearly written on the front of the DMR. e. EPA methods 200.7 or 200.8 (or the most current versions) shall be used for analyses of all metals except for total mercury. f. All effluent samples for all external outfalls shall be taken at the most accessible location after the final treatment but prior to discharge to waters of the U.S. (40 CFR 122.410)). g. For all outfalls where the flow measurement is to be "estimated", the estimate can be done by using calibrated V -notch weir, stop -watch and graduated cylinder, or other method approved by the Division. A. (18.) CHRONIC TOXICITY LIMIT (Monthly) - Outfall 008 [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 90%. The permit holder shall perform, at a minimum, monthhv monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised- December 2010) or subsequent versions. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any month results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed, at a minimum, in each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -December 2010) or subsequent versions. Page 30 of 42 Permit NCO003433 (Continued A. (18.) CHRONIC TOXICITY LIMIT) All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR -1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT -3 (original) is to be sent to the following address: Attention: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, NC 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the Permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address cited above. Assessment of toxicity compliance is based on the toxicity testing month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. Page 31 of 42 Permit NC0003433 A. (19.) CHRONIC TOXICITY LIMIT (Quarterly) - Outfall 008 [15A NCAC 02B.0400 et seq., 02B.0500 et seq.] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 90%. The permit holder shall perform, at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised- December 2010) or subsequent versions. The tests will be performed during the months of February, May, August, and November. These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed, at a minimum, in each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -December 2010) or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR -1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT -3 (original) is to be sent to the following address: Attention: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, NC 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the Permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address cited above. Should the Permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter, which is the three month time interval that begins on the first day of the month in which toxicity testing is required by this permit and continues until the final day of the third month. Page 32 of 42 Permit NC0003433 (Continued A. (19.) CHRONIC TOXICITY LIMIT) Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. A. (20.) GROUNDWATER MONITORING WELL CONSTRUCTION AND SAMPLING The Permittee shall conduct groundwater monitoring to determine the compliance of this NPDES permitted facility with the current groundwater Standards found under 15A NCAC 2L .0200. The monitoring shall be conducted in accordance with the Sampling Plan approved by the Division. See Attachment 1, A. (21.) STRUCTURIAL INTEGRITY INSPECTIONS OF ASH BASIN DAM The facility shall meet the dam design and dam safety requirements per 15A NCAC 2K. A. (21.) ASH BASIN CLOSURE The facility shall prepare an Ash Basins Closure Plan. This Plan shall be submitted to the Division one month prior to the closure of the ash basins. A. (22.) FISH TISSUE MONITORING NEAR ASH BASIN DISCHARGE OUTFALL 008 The facility shall conduct fish tissue monitoring once during the permit term and submit the results with the NPDES permit renewal application. The objective of the monitoring is to evaluate potential uptake of pollutants by fish tissue near the Ash Basin discharge. The parameters analyzed in fish tissue shall be arsenic, selenium, and mercury. The monitoring shall be conducted in accordance with the Sampling Plan approved by the Division. A. (23.) INSTREAM MONITORING The facility shall conduct semiannual instream monitoring and submit results with DMR for Total Arsenic, Total Cadmium, Total Chromium, Total Copper, Total Hardness, Total Lead, Total Mercury (Method 1631 E), Total Selenium, and Total Zinc at the following locations: Instream Sample Description Upstream Outfall 008 Upstream Outfall 008 Downstream Outfall 008 Upstream Outfall 009 (confluence with Shaddox Creek) Downstream Outfall 009 (confluence with Shaddox Creek) Downstream 007 0.9 miles 50 ft uusb Location from Outfall 008 in Fear River from Outfall 008 in Cape Fear River 1.2 miles downstream from Outfall 008 in Cape Fear River East side SR1916 Bridge, Shaddox Creek CP&L Railroad Bridge, Shaddox Creek 2,900 ft downstream from Outfall 007 in the unnamed tributary to the Cape Fear River Page 33 of 42 Permit NC0003433 A. (24.) APPLICABLE STATE LAW (State Enforceable Only) This facility shall meet the requirements of Senate Bill 729. This permit may be reopened to include new requirements imposed by Senate Bill 729. A. (25.) ADDITION OF OTHER WASTEWATERS TO ASH BASIN TREATMENT SYSTEMS The Permittee may introduce on-site groundwater wastewater or on-site ash basin leachate wastewater as influent to the East and West Ash Basins treatment systems provided it does not result in violation of any Outfall 008 effluent limitations or conditions or violation of NC water quality standards or EPA criteria. The Permittee shall determine what additional treatment is required and have the additional treatment operational prior to the addition of groundwater wastewater and landfill leachate wastewater. The Permittee shall submit to the Division EPA Form 2C for groundwater wastewater addition and again for landfill leachate wastewater addition no later than 180 days after the introduction of the specified wastewater to the treatment systems. The Division may open the permit to assign additional effluent limits or conditions to Outfall 008 discharge. A. (26.) DISCHARGE FROM SEEPAGE Existing Discharges from Seepage The facility identified 18 non -engineered discharges from seepage from the ash settling basins. However, 7 of the seeps do not need coverage under this permit based on the low concentration of the constituents associated with coal ash and/or absence of the discharge to the "Waters of the State". These seeps are not considered point .source wastewater discharges under the Clean Water Act. The remaining 11 seeps locations covered by this permit are identified below and are depicted on the permit map. Table 1. Discharge Coordinates and Assigned Outfall Numbers Discharge ID Latitude Longitude Outfall number S-04 S-05 350 35' 35" N 350 35' 25" N 790 2' 34" W 790 2' 48" W 009 007 5-07 350 35' 24" N 790 2' 37" W 007 S-08 350 35' 9" N 790 2' 34" W 007 S-09 350 35' 9" N 790 2" 23" W 010A 5-10 350 35' 9" N 790 2' 19" W 010B S-12 350 35' 16" N 790 2' 41" W 007 S-15 350 35' 20" N 790 3' 5" W 011A S-16 350 35' 25.2" N 790 3' 5" W 011C S-17 S-18 35035'26"N 350 35' 24.9" N 790 3' 5" W 790 3" 5" W 011D 011B The outfall for these discharges is through an effluent channel meeting the requirements in 15A NCAC 2B .0228. Within 180 days of the effective date of this permit, the Permittee shall demonstrate, through in - stream sampling meeting the requirements of condition A. (23.), that the water quality standards in the receiving stream are not contravened. Page 34 of 42 Permit NC0003433 (Continued A. (26.) DISCHARGE FROM SEEPAGE) Discharges from Seepage Identified After Permit Issuance The facility shall comply with the "Plan for Identification of New Discharges" as contained in Attachment 2. For any discharge identified pursuant to this Plan, the facility shall, within 90 days of the seep discovery, determine if the discharge seep meets the state water quality standards established in 15A NCAC 2B .0200 and submit the results of this determination to the Division. If the standards are not contravened, the facility shall conduct monitoring for the parameters specified in A. (11.). If any of the water quality standards are exceeded, the facility shall be considered in violation until one of the options below is fully implemented: 1) Submit a complete application for 404 Permit (within 30 days after determining that a water quality standard is exceeded) to pump the seep discharge to one of the existing outfalls, install a pipe to discharge the seep to the Cape Fear River, or install an in-situ treatment system. After the 404 Permit is obtained, the facility shall complete the installation of the pump, pipe, or treatment system within 180 days from the date of the 404 permit receipt and begin pumping/discharging or treatment. 2) Demonstrate through modeling that the decanting and dewatering of the ash basin will result in the elimination of the seep. The modeling results shall be submitted to the Division within 120 days from the date of the seep discovery. Within 180 days from the completion of the dewatering the facility shall confirm that the seep flow ceased. If the seep flow continues, the facility shall choose one of the other options in this Special Condition. 3) Demonstrate that the seep is discharging through the designated "Effluent Channel" and the water quality standards in the receiving stream are not contravened. This demonstration should be submitted to the Division no later than 180 days from the date of the seep discovery. The "Effluent Channel" designation should be established by the DEQ Regional Office personnel prior to the issuance of the permit. This permit shall be reopened for cause to include the "Effluent Channel" in a revised permit. All effluent limits, including water quality -based effluent limits, remain applicable notwithstanding any action by the Permittee to address the violation through one of the identified options, so that any discharge in exceedance of an applicable effluent limit is a violation of the Permit as long as the seep remains flowing. New Identified Seeps If new seeps are identified, the facility shall follow the procedures outlined above. The deadlines for new seeps shall be calculated from the date of the seep discovery. The new identified seeps are not permitted until the permit is modified and the new seep included in the permit and the new outfall is established for the seep. Page 35 of 42 Permit NC0003433 A. (27.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS [G. S. 143-215.1(B)] Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports and specify that, if a state does not establish a system to receive such submittals, then Permittees must submit monitoring data and reports electronically to the Environmental Protection Agency (EPA). The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015. NOTE: This special condition supplements or supersedes the following sections within Part II of this permit (Standard Conditions for NPDES Permits): • Section B. (11.) • Section D. (2.) • Section D. (6.) • Section E. (5.) Signatory Requirements Reporting Records Retention Monitoring Reports 1. Reportin,2 Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)( Effective December 21, 2016, the Permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application. Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit DMRs electronically using the internet. Until such time that the state's eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR), Permittees will be required to submit all discharge monitoring data to the state electronically using eDMR and will be required to complete the eDMR submission by printing, signing, and submitting one signed original and a copy of the computer printed eDMR to the following address: NC DENR / Division of Water Resources / Water Quality Permitting Section ATTENTION: Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 If a Permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being physically located in an area where less than 10 percent of the households have broadband access, then a temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1. 1, 2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be submitted to the mailing address above. See "How to Request a Waiver from Electronic Reporting" section below. Regardless of the submission method, the first DMR is due on the last day of the month following the issuance of the permit or in the case of a new facility, on the last day of the month following the commencement of discharge. Page 36 of 42 Permit NC0003433 (Continued A. (27.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS) Starting on December 21, 2020, the Permittee must electronically report the following compliance monitoring data and reports, when applicable: Sewer Overflow/Bypass Event Reports; Pretreatment Program Annual Reports; and Clean Water Act (CWA) Section 316(b) Annual Reports. The Permittee may seek an electronic reporting waiver from the Division (see "How to Request a Waiver from Electronic Reporting" section below). 2. Electronic Submissions In accordance with 40 CFR 122.41(1)(9), the Permittee must identify the initial recipient at the time of each electronic submission. The Permittee should use the EPA's website resources to identify the initial recipient for the electronic submission. Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity (EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity for receiving electronic NPDES data [see 40 CFR 127.2(b)]. EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of electronic submission and for each state. Instructions on how to access and use the appropriate electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at: htt ://www2.e a. ov/com )liance/final-national- ollutant-dischar,-,e-elimination-sv.stem-ni?des- electronic-rep orting-rule. Electronic submissions must start by the dates listed in the "Reporting Requirements" section above. 3. How to Request a Waiver from Electronic Repo The Permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic reporting waiver, a Permittee must first submit an electronic reporting waiver request to the Division. Requests for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at least sixty (60) days prior to the date the facility would be required under this permit to begin submitting monitoring data and reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports shall be submitted electronically to the Division unless the Permittee re -applies for and is granted a new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers are not transferrable. Only Permittees with an approved reporting waiver request may submit monitoring data and reports on paper to the Division for the period that the approved reporting waiver request is effective. Page 37 of 42 Permit NC0003433 (Continued A. (27.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS) Information on eDMR and the application for a temporary electronic reporting waiver are found on the following web page: htt _ ://d .nc. ov/about/divisions/water-resources/edmr 4. Sistnatory, Requirements [Supplements Section B. 11. b and Supersedes Section B. 11. All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting purposes. For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account and login credentials to access the eDMR system. For more information on North Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following web page: htti)://deq.ne.gov/about/divisions/water-resources/edmr Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED: "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 assure 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 fines and imprisonment for knowing violations. " 5. Records Retention_ 1SupOements Section D. (6.)1 The Permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These records or copies shall be maintained for a period of at least 3 years from the date of the report. This period may be extended by request of the Director at any time [40 CFR 122.41 ]. Page 38 of 42 Permit NC0003433 ATTACHMENT 1 GROUNDWATER MONITORING PLAN The permittee shall conduct groundwater monitoring as may be required to determine the compliance of this NPDES permitted facility with the current groundwater Standards found under 15A NCAC 2L .0200. WELL CONSTRUCTION a. Monitoring wells shall be constructed in accordance with 15A NCAC 02C .0108 (Standards of Construction for Wells Other than Water Supply) and any other jurisdictional laws and regulations pertaining to well construction. b. Monitoring wells must be constructed by a North Carolina Certified Well Contractor, the property owner, or the property lessee according to General Statutes 87-98.4. If the construction is not performed by a certified well contractor, the property owner or lessee, provided they are a natural person, must physically perform the actual well construction activities. C. Within 30 days of completion of well construction, a completed Well Construction Record (Form GW -1) must be submitted for each compliance monitoring well to Division of Water Resources, Water Quality Regional Operations Section (WQROS), 1636 Mail Service Center, Raleigh, NC 27699-1636. d. The Raleigh Regional Office, telephone number (919) 791-4200, shall approve the location of new compliance monitoring wells prior to installation. The regional office shall be notified at least 48 hours prior to the construction of any compliance monitoring well and such notification to the WQROS regional supervisor shall be made from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays. e. All monitoring wells shall be regularly maintained. Such maintenance shall include ensuring that the well caps are rust -free and locked at all times, the outer casing is upright and undamaged, and the well does not serve as a conduit for contamination. f. If the Permittee intends to abandon a compliance monitoring well either temporarily or permanently, the Permittee shall justify the abandonment and request approval from the WQROS Regional Office within 30 business days prior to initiating abandonment procedures. g. Monitoring wells shall be abandoned in accordance with 15A NCAC 02C .0113 (Abandonment of Wells). Within 30 days of completion of well abandonment, a completed Well Abandonment Record (Form GW -30) must be submitted for each monitoring well to WQROS, 1636 Mail Service Center, Raleigh, NC 27699-1636. h. A map shall be provided within 60 days when compliance wells are added or deleted from the plan. The map shall be of appropriate scale to easily identify all features overlaid on the most recent aerial photograph. At a minimum, the map shall include the following information: i. The location and identity of each monitoring well. ii. The date the map is prepared and/or revised. iii. Topographic contours in no more than ten (10) foot intervals. For areas of high relief, 20 foot intervals shall be acceptable. i. The map and any supporting documentation shall be sent to the WQROS, 1636 Mail Service Center, Raleigh, NC 27699-1636. 2. GROUNDWATER SAMPLING AND COMPLIANCE. a. The compliance boundary for the disposal system shall be specified in accordance with 15A NCAC 02L .0107(a) or (b) dependent upon the date permitted. An exceedance of groundwater standards at or beyond the compliance boundary is subject to remediation action according to 15A NCAC 02L .0106(c) or (d) as well as enforcement actions in accordance with North Carolina General Statute 143-215.6A through 143-215.6C. Page 39 of 42 Permit NC0003433 b. Monitoring wells shall be sampled after construction and thereafter at the frequencies and for the parameters as specified in this plan. All maps, well construction forms, well abandonment forms and monitoring data shall refer to the permit number and the well nomenclature. C. Per 15A NCAC 02H .0800, a Division certified laboratory shall conduct all laboratory analyses for the required effluent, groundwater or surface water parameters. d. The measurement of water levels shall be made prior to purging the wells. The depth to water in each well shall be measured from the surveyed point on the top of the casing. e. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the relative elevation of the measuring point for each monitoring well. The measuring points (top of casing) of all monitoring wells shall be surveyed relative to a common datum. f. Two copies of the monitoring well sampling shall be submitted on a Compliance Monitoring Form (GW-59CCR), and received no later than 60 days from the sampling date. Copies of the laboratory analyses shall be kept on site, and made available upon request. The Compliance Monitoring Form (GW-59CCR) shall include this permit number and the appropriate well identification number. The Compliance Monitoring Forms (GW-59CCR) shall be submitted to the Division of Water Resources Information Processing Unit, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 g. For groundwater samples that exceed the ground water quality standards in 15A NCAC 02L .0202, the Regional Office shall be contacted within 30 days after submission of the groundwater monitoring form; an evaluation may be required to determine the impact of the waste disposal activities. Failure to do so may subject the permittee to a Notice of Violation, fines, and/or penalties. h. The provisions of sections 3(f) and 3(g) apply only to the sampling events described in 3(b) above. The reporting requirements for any sampling events other than those described in 3(b) above shall be in accordance with the general provisions of 15A NCAC 02L. MONITORING WELLS, PARAMETERS, AND SAMPLING FREQUENCY. a. Laboratory methods shall be EPA approved and sufficient to detect constituent quantities at or below their individual 15A NCAC 02L groundwater standards. b. The following chart contains the compliance monitoring wells to be sampled, the parameters to be sampled, and the frequency in which the samples shall be collected. Page 40 of 42 Permit NC0003433 MONITORING PARAMETERS FREQUENCY. WELLS Laboratory Parameters Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Cobalt Chromium Copper Iron Lead Magnesium Manganese Molybdenum CMW-1, CTMW-1, Mercury Nickel Potassium Selenium CMW-2, CTMW-2, Sodium Strontium Thallium Vanadium CMW-3, CMW-5, Zinc Chloride Sulfate Alkalinity tY March, June, MW -6, CMW-7, Total October CTMW-7, CMW-8, Bicarbonate I Total Dissolved Carbonate Suspended CTMW-8, BGMW-4, Solids Solids BGTMW-4 i Field Parameters Turbidity pH Temperature Specific Conductance Dissolved Oxidation Oxygen Reduction Water level Potential Page 41 of 42 Permit NC0003433 ATTACHMENT 2 PLAN FOR IDENTIFICATION OF NEW DISCHARGES (STATE ENFORCEABLE ONLY) http://d_gg.nc.govlabout/divisions/water-resources/water-resources-hot-tol)ics/dwr-co l-ash-reizulationlduke-enerV,V- npdes permits-for-facilities-with-coal-ash-t)onds/duke-ener(-,.%-ni)des-modifications-renewals Page 42 of 42 ko Ie Outfa11011 D t j, ` ` "1 -17* �_ Outfall 009 , dt+ Outfall 011 C IntemalOutfa11005 �'} j - Outfall 011B r S -OS Intemal Outfall 001 S-12 r Outfall 010B t is { Outfall 011 A ` _ 9 Intemal Outfall 008A Outfall O1 OA IR)iarddr� _ Outfall 008 � � `, �• ' ��- ''- 3) a +•� - v` �� 1 1 � r ; 1, s. �� � 111 zoDO SCALE: 1:24000 USGS Quad: E22SE Moncure, NC Outfall 008 Latitude: 350 34'57" N Longitude: 79c2' 59" WJ= Stream Class: WS -IV Facility Location North Subbasin: 03-06-07 HUC: 03030002 Cape Fear Steam Electric Plant NC0003433 Receiving Stream: Cape Fear River Chatham County