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HomeMy WebLinkAboutIMP 2nd Quarter 2018 FINAL_20180406Water Resources Environmental Quality April 6, 2018 Paul Draovitch Senior Vice President Environmental, Health & Safety Duke Energy 526 South Church Street Mail Code EC3XP Charlotte, North Carolina 28202 Subject: Revised Interim Monitoring Plans for 14 Duke Energy Facilities 2nd Quarter 2018 Dear Mr. Draovitch: ROY COOPER Governor MICHAEL S. REGAN Secretary LINDA CULPEPPER Interim Director The North Carolina Department of Environmental Quality (DEQ) is providing the attached revised Interim Monitoring Plans (IMPs) for the respective coal ash facilities. Per our agreement, DEQ will be providing Duke Energy with updated IMPs quarterly until the individual facility Corrective Action Plans are approved, and Duke Energy will include and begin sampling any newly installed groundwater assessment wells as part of the facility IMP which DEQ will formally include in the subsequent IMPs. The attached IMPs only contain references to groundwater monitoring locations. Sampling at surface water locations that were identified as part of the May 1, 2017 communication from DEQ to Duke Energy regarding revised IMPs at the facilities is expected to continue pending further notice. For clarification, we have also provided the minimum expected groundwater sampling analyte list. The attached revised facility IMPs shall be conducted on a quarterly basis commencing the fourth quarter of calendar year 2017 pursuant to 15A NCAC 02L .0110, until Corrective Action Plans are approved for the individual facilities or as directed otherwise by DEQ. The quarterly sampling events will be conducted in conjunction with planned compliance monitoring sampling events for three quarters during the calendar year, supplemented with an additional sampling event conducted at each facility in order to provide four rounds of monitoring data to evaluate seasonal fluctuations during a year-long timeframe. If sampling an individual groundwater location is problematic, please contact the appropriate Regional Office. Since Duke Energy is in the process of submitting Comprehensive Site Assessments, the requirement for an annual monitoring report submitted by April 30th for each respective coal facility as set forth in the May 1, 2017 letter will be extended to a date in 2018 that will be later defined. •'-->'^Nothtng Compares7:,__ State of North Carolina I Environmental Quality I Division of Water Resources Water Quality Regional Operations Section 1636 Mail Service Center I Raleigh, North Carolina 27699-1636 919-707-9129 In order to optimize the groundwater monitoring at each facility, DEQ will be removing the groundwater monitoring condition from the NPDES permits as they are reissued. Duke Energy shall continue to monitor the compliance wells separately under the individual NPDES permits until the NPDES permits are reissued with no groundwater monitoring condition. At that time, the compliance wells shall continue to be monitored per the attached revised IMPS under the authority of 15A NCAC 02L .0110. DEQ is open to consider further optimization of the IMPs following a qualitative and quantitative review of site-specific data. A thorough analysis of spatial and temporal trends related to contaminant distribution that include determination of background conditions and identification of areas impacted by coal. ash residuals must be provided as a decision framework to support improvements to long-term monitoring programs. If you have any questions, please feel free to contact the appropriate Regional Office or Steve Lanter (Central Office) at (919) 807-6444. Sincerely, S. ykierman, P.G. Division of Water Resources Attachments: Revised Interim Monitoring Plans for the 14 coal ash facilities cc: WQROS Regional Offices WQROS Central File Copy Revised Allen Steam Station Interim Monitoring Plan — Groundwater Only Wells to be Sampled AB -10D Sample for Radionuclides (X2 X Regional Office Notes _ AB -10S AB -11D AB -12D AB -12S AB -13D X AB -13S X AB-14BR AB -14D AB -1R AB -2 AB -20D X X Sample to be analyzed for total boron and sulfate only. AB -20S AB -21 BRL AB -21D AB -21S AB -21 SL X AB-22BRL Need to discuss additional assessment potentially needed at this location. AB-22BR AB -22D AB -22S AB-23BRU Sample to be analyzed for total boron and sulfate only. AB -23S Sample to be analyzed for total boron and sulfate only. AB-24BR AB -24D AB -24S AB-24SL AB-25BR Sample to be analyzed for total boron and sulfate only. AB-25BRU Sample to be analyzed for total boron and sulfate only. AB -25S X AB-25SL X AB -26D AB -26S AB-27BR Allen Steam Station Page 1 of 5 March 29, 2018 Wells to be Sampled AB -27D AB -27S Sample for Radionuclides (X) Regional Office Notes AB -28D AB -28S AB -29D AB -29S AB-29SL AB -2D AB -30D AB -30S AB -31S AB -32D AB -32S AB -33D X AB -33S X AB -34D AB -34S AB-35BR X AB -35D Sample to be analyzed for total boron and sulfate only. AB -35S X AB -36D AB -36S AB -37D AB -37S AB-38BR AB -38D AB -38S AB -39D AB -39S AB-4BR X AB -4D X AB -4S X AB -5 AB -6A X AB -6R X AB -9D X AB -9S X BG-1DA X Note: BG -1D has been abandoned thus removed from the IMP. BG -IDA was installed as replacement well. Allen Steam Station Page 2 of 5 March 29, 2018 Sample for Wells to be Sampled Radionuclides -(X)- X)_BG-1S X BG-IS BG-2BRA-2 X Regional Office Notes Note: BG-2BR has been abandoned thus removed from the IMP. BG-2BRA-2 was installed as replacement well. BG -2D X BG -2S X BG -3D X BG -3S X BG-4BR X BG -4D X BG -4S X GWA-14DA Note: GWA-14D has been abandoned thus removed from the IMP. GWA-14DA was installed as replacement well. Monitor pH closely. GWA-14S GWA-15D GWA-15S GWA-16D GWA-16S GWA-17D X GWA-17S X GWA-18D GWA-18S GWA-19D Sample to be analyzed for total boron and sulfate only. GWA-19S GWA-lBR X GWA-1D X GWA-1 S X GWA-21 BR X GWA-21DA X Note: GWA-21D has been abandoned thus removed from the IMP. GWA-21DA was installed as replacement well. GWA-21 S X GWA-22D GWA-22S GWA-23D Sample to be analyzed for total boron and sulfate only. GWA-23S X GWA-24BR Allen Steam Station Page 3 of 5 March 29, 2018 Sample for Wells to be Sampled Radionuclides Regional Office Notes A) GWA-24D Note: GWA-24S has been abandoned thus removed GWA-24SA from the IMP. GWA-24SA was installed as replacement well. GWA-26D GWA-26S GWA-2D X GWA-2S X Note: GWA-3BR has been abandoned thus removed from the IMP. GWA-3BRA was installed as replacement well. GWA-3BRA X Replacement well appears to have water quality issues (elevated pH). Need to discuss potential replacement. GWA-3D X GWA-3S X Note: GWA-4BR has been abandoned thus removed GWA-4BRA X from the IMP. GWA-4BRA was installed as a replacement well. GWA-4D X GWA-4S X Note: GWA-5BR has been abandoned thus removed from the IMP. GWA-5BRA was installed as GWA-5BRA X replacement well. Need to discuss additional assessment potentially needed at this location. GWA-5D X GWA-5S X Note: GWA-6BR has been abandoned thus removed GWA-6BRA X from the IMP. GWA-6BRA was installed as replacement well. Note: GWA-6D has been abandoned thus removed GWA-6DA X from the IMP. GWA-6DA was installed as replacement well. GWA-6S X GWA-7D X GWA-7S X GWA-8D GWA-8S GWA-9D X GWA-9S X GWA-9BR X Allen Steam Station Page 4 of 5 March 29, 2018 Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids Allen Steam Station Page 5 of 5 March 29, 2018 Revised Asheville Steam Electric Plant Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides (x Regional Office Notes ABMW-11BR AMW-03B X AMW-1B X AMW-2A AMW-2B water level only APZ-30 water level only B-1 water level only B -1-A water level only B-2 water level only CB -1 X CB -1 BR water level only CB-1BRL water level only CB -1D X water level only CB-8BR X CB -8D CB-9BR X CB-9SL X GW-lBR GW -1D GW -2 X GW -3 X GW -4 X GW -5 X MW -3D X MW-5BR MW -5D MW -8S X MW -10 X MW -11 MW -11D MW-13BR MW -13D MW-14BR MW -15A X MW-15BR water level only MW -15D X MW -16A X Asheville Steam Electric Plant Page 1 of 3 March 29, 2018 MW-16BR X MW-17A X MW-18BR X MW-18BRL X MW-18D X MW-19BR water level only MW-20A MW-21D X MW-22BR X MW-22D X MW-23BR MW-23DL MW-23DU MW-24S X MW-6BR X MW-6D X MW-6S X MW-7BR water level only MW-8BR water level only MW-9BR X MW-9D X MW-9S X P-102 water level only P-103 PZ-17D X PZ-17S X PZ-19 X PZ-22 X CB-2 CB-3R X CB-4 X CB-4B X CB-5 CB-6 CB-7 CB-8 X CB-9 X GW-1 X CCR-101BR X CCR-102D X CCR-102S X Asheville Steam Electric Plant Page 2 of 3 March 29, 2018 CCR-103BR Boron Copper CCR -103D Selenium Thallium CCR -104D X Hexavalent CCR-105BR Sodium Total Organic CCR -105D X Chromium EXT -01 X Carbon EXT -02 AS-5BR Potential pH issues; recommend redevelopment AS-5BRL Calcium Potential pH issues; recommend redevelopment MW-15BRL X Combined MW-16BRL X MW -16D Uranium MW-17BRL X MW-20BRL X Total MW-25BR X Lead MW-25BRL X Suspended MW -25S MW-26BRL X Solids MW -26S Chromium Magnesium PZ-17BRL X Vanadium Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids Asheville Steam Electric Plant Page 3 of 3 March 29, 2018 Belews Creek Steam Station Interim Monitorine Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides x) Regional Office Notes AB -1 BR AB -1D AB -1S AB -2D AB -2S AB -3D AB -3S AB-4BR Measure all field parameters plus water level, if pH is still high, do not sample for lab analyses AB-4BRD AB -4D AB -4S AB-4SL AB-4SAP Measure all field parameters plus water level, if pH is still high, do not sample for lab analyses - AB -5D _ AB -5S AB-5SL AB -6D AB -6S AB-6SL AB -7D AB -7S AB -8D AB -8S AB-8SL AB-9BR AB-913RD Measure all field parameters plus water level, if pH is still high, do not sample for lab analyses AB -9D AB -9S BG -1D BG -1S X Measure water level if not dry; collect all filed parameters if possible; if there is some water but not enough water for all samples, please collect samples for boron, sulfate, chloride, TDS only. BG-2BRA BG -2D X BG -2S X Belews Creek Steam Station Page 1 of 4 March 29, 2018 BG -3D BG -3S GWA-1 ODA GWA-10S GWA-1113 GWA-11 S GWA-12BR GWA-12D GWA-12S GWA-16BR Measure all field parameters plus water level, if pH is still high, do not sample for lab analyses GWA-16DA GWA-16S GWA-17D GWA-17S GWA-18D GWA-18SA GWA-19BR GWA-19D GWA-19SA GWA-lBR X Measure all field parameters plus water level, if pH is still high, do not sample for lab analyses GWA-1D X GWA-1 S X GWA-20BR GWA-20D GWA-20SA GWA-21D GWA-21 S GWA-22D GWA-22S GWA-23D GWA-23S GWA-24BR GWA-24D X GWA-24S X Measure water level if not dry; collect all filed parameters if possible; if there is some water but not enough water for all samples, please collect samples for boron, sulfate, chloride, TDS only. GWA-25BR X GWA-26BR X GWA-26D X GWA-26S X Belews Creek Steam Station Page 2 of 4 March 29, 2018 GWA-27BR GWA-27D GWA-27S GWA-2D GWA-2S GWA-30D X Measure all field parameters plus water level; if pH is still high, do not sample for lab analyses GWA-30S X GWA-31D GWA-31 S GWA-32D GWA-32S GWA-3D GWA-3S X X Measure water level if not dry; collect all filed parameters if possible; if there is some water but not enough water for all samples, please collect samples for boron, sulfate, chloride, TDS only. GWA-6D GWA-6S GWA-7D X GWA-7SA X GWA-8D X GWA-8S X GWA-9BR GWA-9D GWA-9S MW-104BR Measure all field parameters plus water level, if pH is still high, do not sample for lab analyses MW -104D MW -1045 MW-200BR X MW -200D X MW -200S X MW -201 BR MW -201D MW-202BR MW -202D MW -202S MW-203BR MW -203D MW -203S MW -204D MW -2045 Belews Creek Steam Station Page 3 of 4 March 29, 2018 MW -3 X EX -OB -1 EX -OB -2 Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids Belews Creek Steam Station Page 4 of 4 March 29, 2018 Revised Buck Combined C► cle Station Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides X Regional Office Notes AB -1D AB -1 OBR AB -1 OBRL AB -10D AB -10S AB-2BR X Sample to be analyzed for total boron and sulfate onlN . AB -2D X AB -2S X AB-2SL X AB -3D AB -3S AB4BRL Water quality continues to be an issue (elevated pH). Need to discuss potential replacement. AB-4BRU AB -4S AB-4SL AB-5BRU X Volume has been insufficient to collect sample since 2015. Continue to monitor water level during each sampling event and if volume is sufficient for sampling then collect the sample accordingly. AB -5S X AB-5SL X AB-6BRU AB-7BRU AB -7S AB-8BRUA Note: AB-8BRU has been abandoned thus removed from the IMP. AB-8BRUA was installed as re )lacement well. AB -8S AB-9BRA X Note: AB-9BR has been abandoned thus removed from the IMP. AB-9BRA was installed as replacement well. Monitor pH closely. AB-9BRUA X Note: AB-9BRU has been abandoned thus removed from the IMP. AB-9BRUA was installed as replacement well. AB -9S X AS -1D AS -IS Buck Combined Cycle Station Page 1 of 4 Mach 29, 2018 Wells to be Sampled Sample for Radionuclides X Regional Office Notes AS -2D AS -3D AS -3S BG-1BRA N Note: BG -IBR has been abandoned thus removed from the IMP. BG -1 BRA was installed as replacement well. BG -1S X BG-lDA X Note: BG -1D has been abandoned thus removed from the IMP. BG-lDA was installed as replacement well. Water quality still an issue (appears to be grout contaminated). Need to discuss potential replacement. BG -2D X BG -2S X BG-3BRU X BG -3S X GWA-1 OD GWA-10S GWA-11D GWA-11 S GWA-12BRU X GWA-12S X GWA-13D GWA-13SR GWA-14BR X GWA-14D X Sample to be analyzed for total boron and sulfate only. GWA-14S X GWA-15BR X GWA-15D X GWA-15S X GWA-16BR X GWA-16D X GWA-16S X GWA-17S GWA-18DA X Note: GWA-1.81) has been abandoned thus removed from the IMP. GWA-18DA was installed as replacement well. Need to discuss possible additional assessment in this location sulfate/TDS j. GWA-18S X Buck Combined Cycle Station Page 2 of 4 Mach 29, 2018 Wells to be Sampled Sample for Radionuclides Regional Office Notes GWA-19D X GWA-19S X GWA-1D X GWA-1 S X GWA-20D X GWA-20S X GWA-22D X GWA-2BRA X Note: GWA-2BR has been abandoned thus removed from the IMP. GWA-2BRA was installed as replacement well. GWA-2BRU X GWA-2S X GWA-3BR X GWA-3BRU X GWA-3 S X GWA-4D X GWA-4S X GWA-5BRU X GWA-5S X GWA-6BR X GWA-6BRL X GWA-6BRU X GWA-6S X Volume has been insufficient to collect sample since 2016. Continue to monitor water level during each sampling event and if volume is sufficient for samplingsamplj!!g then collect the sample accordingly. GWA-7D X GWA-7S X GWA-8D GWA-9BRA X Note: GWA-9BR has been abandoned thus removed from the IMP. GWA-9BRA was installed as replacement well. GWA-9D X GWA-9S X MW -10D MW-11BR X MW-11BRL X MW -11D X MW -11S X MW -12D MW -12S MW -13D Buck Combined Cycle Station Page 3 of 4 Mach 29, 2018 Wells to be Sampled Sample for Radionuclides X Regional Office Notes _ MW -1D Selenium MW -1S MW -3D X MW -3S X MW -4D Alkalinity MW -4S Chromium MW -5D Sodium MW -5S MW-6BR X MW -6D X Calcium MW -6S X Strontium MW -7D MW -7S MW-8BRA X Note: MW-8BR has been abandoned thus removed from the IMP. MW-8BRA was installed as replacement well. MW -8D X MW -8S X Chloride MW -9D X Sulfate MW -9S X Minimum Parameters to be AnalNrzed Aluminum Boron Copper Mercury Selenium Thallium Hexavalent Total Organic Alkalinity Cadmium Chromium Molybdenum Sodium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Ma,(mesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids Buck Combined Cycle Station Page 4 of 4 Mach 29, 2018 Revised Cape Fear Steam Electric Plant Interim Monitoring Plan — Groundwater Only Wells to be Sampled ABMW-1 Sample for Radionuclides Regional Office Notes X ABMW-1BR X ABMW-1 S X ABMW-2SL ABMW-2SU ABMW-3 X _ ABMW-3BR ABMW-3SR X ABMW-4 X ABMW-4S X ABMW-5BR ABMW-5S BGMW-4 X BGTMW-4 X CMW-01 X CMW-02 CMW-03 X CMW-5R CMW-06 X CMW-07 X CMW-08 X CTMW-01 X CTMW-02 CTMW-07 CTMW-08 X MW -10 X MW -1013R X MW-10BRL MW -10D MW -11 X MW -12 X MW-12BR MW -13 MW-15BR X MW-15SL I X MW-15SU X MW-16BR X Cape Fear Steam Electric Plant Page 1 of 3 March 29, 2018 MW -16S X MW-17BR MW-17SL X MW-17SU X MW -18S X MW -19S MW-20BR MW -20S MW -21 BR MW -21 SL X MW -21 SU X MW-22BR MW -22S MW-23BR MW -23D X MW -23S X MW-24BR X MW -24S X MW-5BRR MW-6BR X MW -9 X MW-9BR X PZ -1 PZ -10 PZ -2 PZ -3D PZ -3S PZ -4 PZ -5 X PZ -6 PZ -7 PZ -8 Cape Fear Steam Electric Plant Page 2 of 3 March 29, 2018 Minimum Parameters to be Analyzed Aluminum Boron Copper Mercuty Selenium Thallium Alkalinity Cadmium Hexavalent Chromium Molybdenum Sodium Total Organic Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium MaErnesium y Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids Cape Fear Steam Electric Plant Page 3 of 3 March 29, 2018 Revised James E. Rogers Enerpry Complex Interim Monitorinp. Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides X Regional Office Notes AB-1BR0 Redevelop. Sample for boron only. AB -1D AB -IS AB-2BRO Redevelop. Sample for boron only. AB -2D AB -2S AB-3BRUA AB -3I AB -3S X AB-3SLA X AB-4BR AB -4D AB -4S X AB-4SL X AB -513R AB-5BRU AB -5S X AB -613R AB -6D AB -6S X AS -1D AS -1 SB AS -213R AS -2D X AS -2S X AS-3BRU AS -4D AS -4S AS -513R _ AS-5BRU AS -5S AS-6BRA AS -6D AS -6S AS-7BRA AS -7D AS -7S X James E. Rogers Energy Complex Page 1 of 6 March 29, 2018 AS-8D AS-8S BG 1-BRA BG-1D X BG-1S X BG-21) Water level only CCPMW-1D X CCPMW-1 S X CCPMW-2D Water level only CCPMW-2S Water level only CCPMW-3D Water level only CCPMW-3S Water level only CCPMW-4 Water level only CCPMW-5 Water level only CCPMW-6D Water level only CCPMW-6S Water level only CCPTW-1D Water level only CCPTW-1 S Water level only CCPTW-2 Water level only CLMW-1 X CLMW-2 CLMW-3D X CLMW-3S X CLMW-5D CLMW-5S CLMW-6 CLP-1 Water level only CLP-2 Water level only CLP-3 Water level only CLP-4 Water level only GWA-1 OD GWA-lOS GWA-11BRU X GWA-11 S X GWA-12BRU GWA-12S GWA-13BR GWA-14BR GWA-14D GWA-14S GWA-1BRU James E. Rogers Energy Complex Page 2 of 6 March 29, 2018 GWA-20BR X GWA-20D X GWA-20S X GWA-21 BR X GWA-21 BRU X GWA-21 S X GWA-22BRU GWA-22S X GWA-23D GWA-24BR GWA-24D GWA-24S GWA-25S GWA-25D Water level only GWA-26S GWA-26D Water level only GWA-27BR X GWA-27D-A X GWA-28BR GWA-28BRU GWA-28S GWA-29BRA GWA-29D X GWA-2BR X GWA-2BRU X GWA-2S X GWA-30BR GWA-30BRU Water level only GWA-30S GWA-31BR-A GWA-31D GWA-32D GWA-32BR Water level only GWA-33BR GWA-33D GWA-33S GWA-34S GWA-35D GWA-35S GWA-36D X GWA-36S X James E. Rogers Energy Complex Page 3 of 6 March 29, 2018 GWA-37D GWA-37S GWA-38D GWA-38S GWA-39S Water level only GWA-3D X GWA-40S Water level only GWA-42S Water level only GWA-43D GWA-43S GWA-44BR GWA-44D GWA-44S GWA-45D Water level only GWA-45 S GWA-46D GWA-47D GWA-48BR GWA-4BR Water level only GWA-4D X GWA-4S X GWA-51D GWA-54D GWA-54BRO GWA-54S GWA-56D GWA-56S GWA-5BRU GWA-5S GWA-6S GWA-6D Water level only MW-10D MW-10S MW-11BRO Redevelop. Sample for boron only. MW-11DA MW-11S X MW-20D MW-20DR MW-21 BR MW-21D MW-22BR James E. Rogers Energy Complex Page 4 of 6 March 29, 2018 MW-22DR MW -23D MW-23DR MW -23S MW -24D X MW-24DR X MW-25DR MW -2D -A MW -30D X MW-30DA X MW -30S X MW-32BR X MW -32D X MW -32S X MW -34S MW-34BRU MW-36BRU MW -36S MW-38BR X MW -38D X MW -38S X MW-40BRU MW -40S MW-42DA MW -42S MW -8D MW -8S X U5 -1D U54 S U5-2BR U5 -2D X U5 -2S -SL -A X U5-4BRA U5 -4D U5 -4S U5-5BR U5 -5D X U5 -6D U5 -6S U5-8BR U5 -8D James E. Rogers Energy Complex Page 5 of 6 March 29, 2018 U5 -8S Boron Copper CCR12-S Selenium Thallium CCR -12D Cadmium Hexavalent CCR -13D Sodium Total Organic CCR -15D Chromium CCR -IB -1S Carbon CCR -IB -1D CCR -IB -3S Total CCR -IB -3D Calcium Iron CCR -U5 -4S Sample 1St Quarter 2018 only CCR -U5 -4D Sample 1St Quarter 2018 only CCR -7S Sample 1St Quarter 2018 only CCR -7D Sample 1St Quarter 2018 only Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids James E. Rogers Energy Complex Page 6 of 6 March 29, 2018 Dan River Combined Cycle Station Interim Monitorin Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides X Regional Office Notes AB-30BR AB -30D AB -30S BG -IDA X Measure water level if not dry; collect all filed parameters if possible; if there is some water but not enough water for all samples, please collect samples for boron, sulfate, chloride, TDS oniti. BG -10D X BG -10S X X BG-10BR BG -5D BG -5S GWA-10D GWA-12D GWA-12S GWA-14D GWA-14S GWA-15D GWA-16D GWA-16S GWA-17D GWA-20D GWA-20S GWA-4D GWA-4S GWA-5BR GWA-5BRD GWA-6D X GWA-6S X GWA-7D GWA-7S GWA-8BR GWA-8D GWA-8S GWA-9D X GWA-9S X MW -11 X Measure water level if not dry; collect all filed arameters ifpossible; if there is some water but not Dan River Combined Cycle Station Page 1 of 2 March 29, 2018 Minimum Parameters to be Analr zed Aluminum Boron enough water for all samples, please collect samples for boron, sulfate, chloride, TDS only. MW -11D X Thallium MW -12 X Hexavalent MW -12D X Total Organic MW -21D Cadmium MW -21S Sodium MW-22BR X Chromium MW -22D X Carbon MW -22S X MW-23BR Total Antimony MW -23D Iron Nickel MW-317BR Combined MW-317BRL Minimum Parameters to be Analr zed Aluminum Boron Copper Mercury Selenium Thallium Hexavalent Total Organic Alkalinity Cadmium Molybdenum Sodium Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Maltnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids Dan River Combined Cycle Station Page 2 of 2 March 29, 2018 Revised H. F. Lee EnergN, Complex Interim Monitoring Plan — Groundwater Onlr Wells to be Sampled Sample for Radionuclides X Regional Office Notes ABMW-1 ABMW-1 S X AMW-11BC AMW-11 S X AMW-12BC AMW-12S AMW-13BC AMW-13S AMW-14BC AMW-14S AMW-15BC AMW-15S AMW-16BC AMW-17BC AMW-17S AMW-18S X AMW-6RBC AMW-9BC AMW-19S AMW-19BC AMW-20S AMW-20BC AMW-21 S AMW-21BC AMW-22S AMW-22BC AMW-23S AMW-23BC BGMW-10 BGMW-9 BW -1 CCR -100S X CMW-10 CMW-5 CMW-6R CMW-7 CMW-8 H. F. Lee Energy Complex Pagel of 3 March 29, 2018 CTMW-1 CW-1 CW-2 CW-3 CW-4 DMW-1 DMW-2 DMW-3 IABMW-1 IABMW-1 S X IABMW-2S IABMW-3 IABMW-3S X IMW-04BC IMW-05BC IMW-lBC IMW-1 S X IMW-2BC IMW-3BC IMW-3S X IMW-4S X HMW-5S X LLMW-1 LLMW-1 S LLMW-2 LLMW-2S MW-1 MW-2 MW-3 X SMW-3 SMW-4 SMW-5 H. F. Lee Energy Complex Page 2 of 3 March 29, 2018 Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids H. F. Lee Energy Complex Page 3 of 3 March 29, 2018 Revised Marshall Steam Station Interim Monitoring Plan — Groundwater Only Wells to be Sampled AB-l0BR Sample for Radionuclides Regional Office Notes AB -10D AB -10S AB -IDSL AB -11D AB -11S AB-12BR X AB -12D X AB -12S X AB-12SL X AB -13D AB -13S AB -14D AB -14S AB-15BR AB -15D AB -15S AB-15SL AB -16D AB -16S AB -17D AB -17S AB -18D AB -18S AB-1BRL X Need to discuss additional assessment potentially needed at this location. AB -113R X AB -1D X AB -1S X AB -20D AB -20S AB -21D AB -21S AB -2D X AB -2S X AB -3D AB -3S Marshall Steam Station Page 1 of 5 March 29, 2018 Wells to be Sampled Sample for Radionuclides ]C Regional Office Notes AB -4D AB -4S AB-4SL AB-5BR X AB -5D X AB -5S X AB-6BRL AB-6BRA Note: AB-6BR has been abandoned and thus removed from the IMP. AB-6BRA was installed as replacement well. AB -6D AB -6S AB -7D AB -7S AB -8D AB -8S AB -913R AB -9D AB -9S AL -113R X Monitor closely, boron concentrations are trending upward. AL -1D X AL -1S X AL -213R AL-2BRL AL-2BRLL Need to discuss additional assessment potentially needed at this location. AL -2D AL -2S AL -313R AL -3D AL -3S AL-4BRL AL-4BR AL -4D BG-IBRA X Note: BG -IBR has been abandoned and thus removed from the IMP. BG-1BRA was installed as re lacement well. BG -ID X BG -IS X BG-2BR X Marshall Steam Station Page 2 of 5 March 29, 2018 Wells to be Sampled Sample for Radionuclides [fir X Regional Office Notes BG -2S BG-3BR _ X BG -3D X BG -3S X GWA-IBR X GWA-1D X GWA_-1 S X GWA-2DA Note: GWA-21) has been abandoned and thus removed from the IMP. GWA-2DA was installed as replacement well. GWA-2S GWA-3D GWA-3S GWA-4D GWA-4S GWA-5D GWA-5S GWA-6D X GWA-6S X GWA-7D GWA-7S GWA-8D GWA-8S GWA-9BR GWA-10D GWA-10S GWA-11BR X GWA-11D X GWA-11 S X GWA-12BR X GWA-12D Sample to be analyzed for total boron and sulfate only. GWA-12S X GWA-13DA Sample to be analyzed for total boron and sulfate onl% . GWA-13S GWA-14D GWA-14S _ GWA-15S X MS -8 Marshall Steam Station Page 3 of 5 March 29, 2018 Wells to be Sampled MS -10 MS -11 Sample for Radionuclides Regional Office Notes A) X X X MS -13 MW -1 MW -10D MW -10S MW -11D MW -11S MW -12D MW -12S MW -13D MW -13S MW-14BR X MW -14D X MW -14S X MW -2 MW -3 MW -4 X MW -4D X MW -5 MW -6D X MW -6S X MW -7 Water level only MW -7D X MW -7S X MW -8D X MW -8S X MW -9D X MW -9S X OB -1 (Dry Ash Basin) OB -1 (Dry Ash Landfill) Water level only Marshall Steam Station Page 4 of 5 March 29, 2018 Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids Marshall Steam Station Page 5 of 5 March 29, 2018 Revised Mai o Steam Electric Plant Interim Monitorin, Plan — Groundwater OWN Sample for Wells to be Sampled Radionuclides X Regional Office Notes ABMW-1 X ABMW-2 ABMW-2BR ABMW-2BRL ABMW-3 ABMW-3S ABMW-4 X ABMW-4BR ABMW-4D BG -1 X BG -2 X CW -1 CW-lD CW -2 X CW -2D X CW -3 CW -4 CW -5 CW -6 X MW-10BR X MW-11BR water level only MW -12D X MW -12S X MW-13BR MW-14BR MW-15BR water level only MW-16BR X MW -16D X MW -16S MW -18D MW-18BR MW -19D MW-19BR MW -2 MW -3 X MW-3BR MW -4 Mayo Steam Electric Plant Page 1 of 2 March 29, 2018 MW-5BR MW-8BR MW-9BR water level only MW-9BRL Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids Mayo Steam Electric Plant Page 2 of 2 March 29, 2018 Riverbend Steam Station Interim Monitoring Plan — Groundwater OWN Wells to be Sampled Sample for Radionuclides Regional Office Notes AB -11) Measure all field parameters plus water level, if pH still high, not sample for lab analyses. AB -IS AB -21) AB -2S AB -8D AB -8S BG-lDA BG -1 S BG-2BR BG -2D BG -2S BG -3D BG -3S BG-4BR X BG -4D X BG -4S X BG-5BR BG -5D Field parameters plus water level, if pH still high, not sample for lab analyses. _ GWA-10BRU GWA-10S GWA-111) GWA-11 S GWA-12D X GWA-12S X GWA-13D GWA-13S GWA-14D GWA-14S GWA-15D GWA-15S X GWA-1BRU GWA-1 S GWA-20BR GWA-20DA GWA-20S GWA-21BR Riverbend Steam Station Page 1 of 3 March 29, 2018 GWA-21D GWA-21 S GWA-22BR-A X GWA-22D X GWA-22S X GWA-23BR Field parameters plus water level, if pH still high, not sample for lab analyses. GWA-23DA GWA-23S GWA-2BR X GWA-2BRU X GWA-2S X GWA-3BR GWA-3D GWA-3S-A GWA-4BR GWA-4D X GWA-4S X GWA-5D GWA-5S _ GWA-6D X GWA-6S X GWA-7BR GWA-7D GWA-7S GWA-8D X GWA-8S X GWA-9BR X GWA-9D X GWA-9S X MW -10 X MW-11DR MW -11 SR MW -13 MW -14 X MW -15 - MW-15BR MW-15DA MW -1D MW -1 S MW -2D _ MW -2S -A Riverbend Steam Station Page 2 of 3 March 29, 2018 MW -3D Boron Copper MW -3S Selenium Thallium MW -4D Cadmium Hexavalent MW -4S Sodium Total Organic MW -5D Chromium MW -5S Carbon MW -6D MW -6S Total MW-7BRA X Iron MW -7D X Combined MW-7SR X MW -8D Uranium MW -8I MW -8S Total MW -9 X Lead MW-9BRA X Suspended MW-9DA X OB -1 Water level only OB -2 Chromium Water level only Radium 226 Sulfide Vanadium Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids Riverbend Steam Station Page 3 of 3 March 29, 2018 Revised Roxboro Steam Electric Plant Interim Monitoring Plan — Groundwater Only Wells to be Sample for Sampled Radionuclides x Regional Office Notes ABMW-1 X water level only ABMW-lBR X ABMW-2 X water level only ABMW-2BR X ABMW-3 ABMW-3BR ABMW-3BRL ABMW-4 X ABMW-4BR X ABMW-5 X ABMW-5D X ABMW-6 ABMW-6BR ABMW-7 water level only ABMW-7BR ABMW-7BRL BG -1 X BG-lBR X BG-1BRL water level only BG-1BRLR X BG-2BR X CW -1 CW -2 X CW -2D X CW -3 CW -3D CW -4 CW -5 X GMW-10 GMW-11 GMW-6 X GMW-7 GMW-8 GMW-9 MW-lBR MW-2BR MW-3BR X Roxboro Steam Electric Plant Page 1 of 3 March 29, 2018 MW-4BR MW-4BRL water level only MW-5BR X MW-5D X MW-6BR X MW-6D X MW-7BR MW-8BR MW-9BR X MW-10BR X MW-11BR X MW-11D X MW-12BR MW-13BR X MW-14BR X MW-15BR X MW-15D X MW-16BR X MW-17BR X MW-18BR X MW-18D X MW-19BRL X MW-2 X MW-20BRL MW-21BRL water level only MW-22BR MW-22D MW-23BR water level only MW-23BRR _ MW-24BR MW-25BR MW-26BR MW-27BR MW-28BR MW-29BR MW-30BR MW-31BR MW-32BR MW-33BR GPMW-1 S GPMW-1D Roxboro Steam Electric Plant Page 2 of 3 March 29, 2018 GPMW-lBR 1 Boron Copper GPMW-2D Selenium Thallium GPMW-2BR Cadmium Hexavalent GPMW-3D _ Total Organic GPMW-3BR Chromium Minimum Parameters to be Analyzed Aluminum 1 Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt I' Manganese Radium 228 Dissolved Zinc I Solids Roxboro Steam Electric Plant Page 3 of 3 March 29, 2018 Revised L.V. Sutton Enerey Complex Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides Regional Office Notes x X X AW -1C AW -2C AW -2D AW -3C AW -4C AW -5C AW -5D AW -6R -D AW -6R -E AW -7R -D AW -08C AW -09C AW -09D MW -05C X MW-05CD X MW -05D X MW -05R -E MW -7C MW -8 X MW -8E X MW -11 MW -12R MW -16D MW -19 MW -20 MW -20D MW -21C MW -22B MW -22C MW -23B MW -23C MW -23D X MW -23E X MW -24R -B MW -24R -C MW -27B X MW -27C MW -28B MW -28C L.V. Sutton Energy Complex Page 1 of 2 March 29, 2018 MW -31R -C X MW -32C X MW -33C X MW -36C X MW -37B X MW -37C X MW-37CD X MW -37D X MW -37E X MW -38B MW -38C X MW -38D X MW -39B Calcium MW -39C X MW -39D X MW -40B MW -40C MW -40D Uranium MW -41E SMW-01 C SMW-02C Total SMW-03C Chloride SMW-04C Potassium SMW-5C Suspended SMW-06C SMW-06D Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexavalent Molybdenum Sodium Total Organic Chromium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium _ Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Magnesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids L.V. Sutton Energy Complex Page 2 of 2 March 29, 2018 'Revised W. H. Weatherspoon Power Plant Interim Monitorin_,, Plan — Groundwater On11 Wells to be Sampled Sample for Radionuclides (g) Regional Office Notes AW -01D AW -01I AW -01S AW -02D AW -02S AW -03D AW -03I AW -03S BW -01 BW -02S X BW -03D X BW -03I X BW -03S X BW -4D X BW -4I X BW4S X CCR -101 -BG CAMA X CW -01 CW -02 CW -03 X MW -01 X MW -02 X MW -03 X MW -04 X MW -05 X MW -06 X MW -07 X MW -33D MW -33I MW -33S MW -41D MW -41I MW -52 X MW -53D MW -53I MW -54D MW -55D X W. H. Weatherspoon Power Plant Page 1 of 2 March 29, 2018 MW -55I 1 X PW -1 (DEP 2) 1 Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Hexavalent Total Organic Alkalinity Cadmium Chromium Molybdenum Sodium Carbon Total Antimony Calcium Iron Nickel Strontium Combined Uranium Total Arsenic Chloride Lead Potassium Sulfate Suspended Solids Barium Chromium Ma,,nesium Radium 226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids W. H. Weatherspoon Power Plant Page 2 of 2 March 29, 2018