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Home My WebLink AboutIMP 4th Quarter 2017 FINAL_20171019Water Resources Environmental Quality October 19, 2017 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 Fourth Quarter 2017 Dear Mr. Draovitch: ROY COOPER Governor MICHAEL S. REGAN Secretary S. JAY ZIMMERMAN 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, the DEQ will be providing Duke Energy with updated IMPs quarterly until the individual facility Corrective Action Plans are approved. Also, per our agreement, Duke Energy will include and begin sampling any newly installed groundwater assessment wells as part of the facility IMP and the DEQ will formally include it in the subsequent updated quarterly IMP. 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. DEQ may elect to provide Duke Energy with additional surface sampling locations to incorporate into the revised IMPs at a future time. 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 accepted for the individual facilities or as directed otherwise by the 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 call the Regional Office that manages the facility to discuss issues. Any changes to IMPs and sampling requirements must be discussed with the respective Regional Offices and coordinated by official correspondence from the DEQ Central Office. Since Duke Energy will submit updated Comprehensive Site Assessments in the near future, the requirement for an annual monitoring report submitted by April 30th for each respective coal 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 facility as set forth in the May 1, 2017 letter will be extended to a date in 2018 that will be later defined. 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. The 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 Steve Lanter at (919) 807-6444. Sincerely, S. Jay Zimmerman, P.G., Director 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 Sample for Radionuclides (X Regional Office Notes AB-10D AB-10S AB-11D X AB-12D AB-12S AB-13D X AB-13S X AB-14BR AB-14D AB-1R AB-2 AB-20D AB-20S AB-21BRL X AB-21 D X Sample to be analyzed for total boron and sulfate only. AB-21 S X AB-21 SL X AB-22BR Lower bedrock (AB-22BRL) scheduled to be installed by mid -October — early November for purposes of vertical delineation. AB-22D AB-22S AB-23BRU Sample to be analyzed for total boron and sulfate only. AB-23S AB-24BR AB-24D Sample to be analyzed for total boron and sulfate only. AB-24S AB-24SL AB-25BR X Sample to be analyzed for total boron and sulfate only. AB-25BRU X Sample to be analyzed for total boron and sulfate only. AB-25S X AB-25SL X AB-26S AB-27BR Allen Steam Station Page 1 of 4 October 1, 2017 AB-27D AB-27S AB-28D AB-28S AB-29D AB-29S AB-29SL AB-2D AB-30D AB-30S AB-31 S AB-32D AB-32S AB-33D X AB-33S X AB-34D AB-34S AB-35BR X AB-35D X 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-lDA X Note: BG-1D has been abandoned and thus removed from the IMP. BG-lDA was installed as replacement well. BG-1 S X Allen Steam Station Page 2 of 4 October 1, 2017 BG-2BRA X Note: BG-2BR has been abandoned and thus removed from the IMP. BG-2BRA was installed as replacement well. BG-2D X BG-2S X BG-3D BG-3S BG-4BR BG-4D BG-4S GWA-14DA Note: GWA-14D has been abandoned and thus removed from the IMP. GWA-14DA was installed as replacement well. 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-1BR X GWA-ID X GWA-1S X GWA-21BR X GWA-21DA X Note: GWA-21D has been abandoned and thus removed from the IMP. GWA-21DA was installed as replacement well. GWA-21S X GWA-22D GWA-22S GWA-23D Sample to be analyzed for total boron and sulfate only. GWA-23S GWA-24BR GWA-24D GWA-24SA Note: GWA-24S has been abandoned and thus removed from the IMP. GWA-24SA was installed as replacement well. GWA-26D Allen Steam Station Page 3 of October 1, 2017 GWA-26S GWA-2D X GWA-2S X GWA-3BRA X Note: GWA-3BR has been abandoned and thus removed from the IMP. GWA-3BRA was installed as replacement well. GWA-3D X GWA-3S X GWA-4BRA X Note: GWA-4BR has been abandoned and thus removed from the IMP. GWA-4BRA was installed as replacement well. GWA-4D X GWA-4S X GWA-SBRA X Note: GWA-5BR has been abandoned and thus removed from the IMP. GWA-SBRA was installed as replacement well. GWA-5D X GWA-5S X GWA-6BR X Replacement bedrock (GWA-6BRA) scheduled to be installed by mid -October — early November. GWA-6DA X GWA-6S X GWA-7D X GWA-7S X GWA-8D GWA-8S GWA-9D X GWA-9S X GWA-9BR X 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 4 of 4 October 1, 2017 Revised Asheville Steam Electric Plant Interim Monitoring Plan — Groundwater Onlv Wells to be Sampled Sample for Radionuclides X Regional Office Notes ABMW-I1BR AMW-03B X AMW-lB X AMW-2A AMW-213 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-1BR water level only CB-1BRL water level only CB-1D X CB-8BR X CB-8D water level only CB-9BR X CB-9SL X GW-lBR GW-ID 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 October 1, 2017 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 MW-9BR X MW-9D X MW-9S X P-102 water level only P-103 PZ-16 Needs to be replaced and added to IMP. PZ-17D X PZ-17S X PZ-19 X PZ-22 X Asheville Steam Electric Plant Page 2 of 3 October 1, 2017 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 October 1, 2017 Revised Belews Creek Steam Station Interim Monitoring Plan — Groundwater Onlv Wells to be Sampled Sample for Radionuclides (X) Regional Office Notes AB-1BR AB -ID AB -IS AB-2D AB-2S AB-3D AB-3S AB-4BR Measure pH, if still high, do not sample AB-4BRD AB-4D AB-4S AB4SL Measure pH, if still high, do not sample 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-9BRD AB-9D AB-9S BG-ID BG-1 S X Dry 7/19/17; continue monitoring BG-2BR BG-2D X BG-2S X BG-3D BG-3S GWA-10DA GWA-10S GWA-11D Belews Creek Steam Station Page 1 of 4 October 1, 2017 GWA-11S GWA-12BR GWA-12D GWA-12S GWA-16BR GWA-16DA GWA-16S GWA-17D GWA-17S GWA-18D GWA-18SA GWA-19BR GWA-19D GWA-19SA GWA-1BR X GWA-1D X GWA-lS X GWA-20BR GWA-20D GWA-20SA GWA-21 D GWA-21S GWA-22D GWA-22S GWA-23D GWA-23S GWA-24BR GWA-24D X GWA-24S X Insufficient Volume 7/21/17; continue monitoring GWA-25BR X GWA-26BR X GWA-26D X GWA-26S X GWA-27BR GWA-27D GWA-27S GWA-2D GWA-2S GWA-30D X GWA-30S X GWA-31D Belews Creek Steam Station Page 2 of 4 October 1, 2017 GWA-31S GWA-32D GWA-32S GWA-3D GWA-3S Insufficient Volume 7/21/17; continue monitoring GWA-6D X GWA-6S X GWA-7D X GWA-7SA X GWA-8D X GWA-8S X GWA-9BR GWA-9D GWA-9S MW-104BR MW-104D MW-104S MW-200BR X MW-200D X MW-200S X MW-201BR MW-201D MW-202BR MW-202D MW-202S MW-203BR MW-203D MW-203S MW-204D MW-204S MW-3 X Belews Creek Steam Station Page 3 of 4 October 1, 2017 Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexava lent 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 October 1, 2017 Revised Buck Combined Cycle Station Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides X Regional Office Notes AB-1D AB-1 OBR Lower bedrock (AB-1 OBRL) scheduled to be installed by early November — early December for purposes of vertical delineation. AB-1 OD AB-1 OS AB-2BR X Sample to be analyzed for total boron and sulfate only. AB-2D X AB-2S X AB-2SL X AB-3D AB-3S AB-4BR Discontinue sampling AB-4BR. Based on review of analytical (submitted on 2/13/2017), water quality at AB-4BRL is acceptable (pending background). AB-4BRL AB-4BRU AB-4S AB-4SL AB-SBRU X AB-5S X AB-5SL X AB-6BRU AB-7BRU AB-7S AB-8BRU AB-8S AB-9BRA X Note: AB-9BR has been abandoned and thus removed from the IMP. AB-9BRA was installed as re lacement well. AB-9BRUA X Note: AB-9BRU has been abandoned and thus removed from the IMP. AB-9BRUA was installed as replacement well. AB-9S X AS-1D AS-1 S AS-2D AS-3D Buck Combined Cycle Station Page I of 4 October 1, 2017 AS-3S BG-1BRA Note: BG-lBR has been abandoned and thus removed from the IMP. BG-1BRA was installed as replacement well. BG-1DA Note: BG-lD has been abandoned and thus removed from the IMP. BG-1DA was installed as replacement well. BG-1 S BG-2D X BG-2S X BG-3BRU X BG-3S X GWA-10D GWA-10S GWA-11D GWA-11S 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-15D X GWA-15BR scheduled to be installed early November — early December for purposes of vertical delineation. GWA-15S X GWA-16BR X GWA-16D X GWA-16S X GWA-17S GWA-18DA X Note: GWA-18D has been abandoned and thus removed from the IMP. GWA-18DA was installed as replacement well. GWA-18S X GWA-19D X GWA-19S X GWA-1D X GWA-1 S X GWA-20D X GWA-20S X GWA-22D X Buck Combined Cycle Station Page 2 of 4 October 1, 2017 GWA-2BRA X Note: GWA-2BR has been abandoned and 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-3S X GWA-4D X GWA-4S X GWA-SBRU X GWA-5S X GWA-6BR X Lower bedrock (GWA-6BRL) scheduled to be installed by early November — early December for oses of vertical delineation. GWA-6BRU X GWA-6S X GWA-7D X GWA-7S X GWA-8D GWA-9BRA X Note: GWA-9BR has been abandoned and thus removed from the IMP. GWA-9BRA was installed as replacement well. GWA-9D X GWA-9S X MW-lOD MW-1 l BR X Lower bedrock (MW-11BRL) scheduled to be installed by early November — early December for purposes of vertical delineation. MW-11D X MW-llS X MW-12D MW-12S MW-13D MW-ID MW-1 S MW-2S MW-2D MW-3D X MW-3S X MW-4D MW-4S MW-5D Buck Combined Cycle Station Page 3 of 4 October 1, 2017 MW-5S MW-6BR X MW-6D X MW-6S X MW-7D MW-7S MW-8BR X Note: MW-8BR has been abandoned and thus removed from the IMP. MW-8BRA was installed as replacement well. MW-8D X MW-8S X MW-9D X MW-9S X 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 Buck Combined Cycle Station Page 4 of 4 October 1, 2017 Revised Cane Fear Steam Electric Plant Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides (X Regional Office Notes ABMW-1 X ABMW-1BR X ABMW-IS 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-Ol X CMW-02 CMW-03 X CMW-5R Installed 7/19/17 CMW-06 X CMW-07 X CMW-08 X CTMW-01 X CTMW-02 CTMW-07 CTMW-08 X MW-10 X MW-lOBR X MW-1 OBRL MW-101) MW-11 X MW-12 X MW-12BR MW-13 MW-15BR X MW-15SL X MW-15SU X MW-16BR X Cape Fear Steam Electric Plant Page 1 of 3 October 1, 2017 MW-16S X MW-17BR MW-17SL X MW-17SU X MW-18S X MW-19S MW-20BR MW-20S MW-21BR MW-21 SL X MW-21SU X MW-22BR MW-22S MW-23BR MW-23D X MW-23S X MW-24BR X Duke indicated in email sent 9-18-17 this well location is designated MW-24BR 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 October 1, 2017 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 Cape Fear Steam Electric Plant Page 3 of 3 October 1, 2017 Revised James E. Rogers Energy Complex Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides M Regional Office Notes AB -ID AB-lS AB-2D AB-2S AB-3BR A13-3I AB-3S X AB-3SL X AB-4BR AB-4D AB-4S X AB-4SL X AB-5BR AB-5BRU AB-5 S X AB-6BR AB-6D AB-6S X AS -ID AS-1 SB AS-2BR AS-2D X AS-2S X AS-3BRU AS-4D AS-4S AS-5BRU AS-5S AS-6D AS-6S AS-7D AS-7S X BG-lD X BG-1 S X BG-2D X CCPMW-lD X CCPMW-lS X James E. Rogers Energy Complex Page 1 of 5 October 1, 2017 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 GWA-10D GWA-10S GWA-11BRU X GWA-11S X GWA-12BRU GWA-12S GWA-13BR GWA-14BR GWA-14D GWA-14S GWA-1BRU GWA-20BR X GWA-20D X GWA-20S X GWA-21BR X GWA-21BRU X GWA-21D GWA-21S X GWA-22D 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 James E. Rogers Energy Complex Page 2 of 5 October 1, 2017 GWA-28S 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 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 GWA-45S GWA-46D GWA-47D GWA-48BR GWA-48S GWA-4D X GWA-4S X James E. Rogers Energy Complex Page 3 of 5 October 1, 2017 GWA-SBRU GWA-5S GWA-6S GWA-6D water level only 1B-3D IB-3S X MW-10D MW-10S MW-11D MW-11S X MW-20D MW-20DR MW-21BR MW-21D MW-22BR MW-22DR MW-23D MW-23DR MW-23S MW-24D X MW-24DR X MW-25DR MW-2D-A MW-30D 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-42D MW-42S MW-8D MW-8S X James E. Rogers Energy Complex Page 4 of 5 October 1, 2017 U5-lD U5-1 S U5-2BR U5-2D X U5-2S-SL-A X U5-3D U5-4D U5-4S U5-5BR U5-5D X U5-6D U5-6S U5-8BR U5-8D U5-8S Minimum Parameters to be Analyzed Aluminum Boron Cop er 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 Radium226 Sulfide Vanadium Total Beryllium Cobalt Manganese Radium 228 Dissolved Zinc Solids James E. Rogers Energy Complex Page 5 of 5 October 1, 2017 Revised Dan River Combined Cycle Station Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides X Regional Office Notes AB-30BR AB-30D AB-30S AB-35BR AB-5D AB-5S AS-12S AS-8BR AS-8D BG-1DA X Insufficient volume 8/24/17; continue motoring BG-1 OD X BG-10S X BG-1 OBR X BG-5D BG-5S GWA-10D GWA-12D GWA-12S GWA-14D GWA-14S GWA-15D GWA-16D GWA-16S GWA-17D GWA-18D X 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 Dan River Combined Cycle Station Page 1 of 2 October 1, 2017 GWA-8S GWA-9D X GWA-9S X MW-10 X Dry 8/24/17; continue monitoring MW-10D X MW-11 X Dry 8/24/17; continue monitoring MW-11D X MW-12 X MW-12D X MW-21D MW-21S MW-22BR X MW-22D X MW-22S X MW-23BR MW-23D MW-317BR MW-317BRL MW-9 Dry 8/24/17; continue monitoring MW-9D 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 Dan River Combined Cycle Station Page 2 of 2 October 1, 2017 Revised H. F. Lee Energy Complex Interim Monitoring Plan — Groundwater Onlv Wells to be Sampled Sample for Radionuclides X Regional Office Notes ABMW-1 ABMW-IS X AMW-11BC AMW-11S 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 Well pairs AMW-19-23 S/BC were added to the list. 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 Page 1 of 3 October 1, 2017 CTMW-1 CW-1 CW-2 CW-3 CW-4 DMW-1 DMW-2 DMW-3 IABMW-1 IABMW-IS X IABMW-2S IA13MW-3 IABMW-3S X IMW-04BC IMW-05BC IMW-lBC IMW-is X RAW-2BC IMW-3BC IMW-3S X IMW-4S X IMW-5S X LLMW-1 LLM W-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 October 1, 2017 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 October 1, 2017 Revised Marshall Steam Station Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides X Regional Office Notes AB-10BR AB-1O1) AB-10S AB-1 OSL AB-11D AB-11 S 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-1BR X Lower bedrock (AB-1BRL) scheduled to be installed by mid -October for purposes of vertical delineation. AB-1D X AB -IS X AB-20D AB-20S AB-21D AB-21 S AB-2D X AB-2S X AB-3D AB-3S AB-4D Marshall Steam Station Page I of 5 October 1, 2017 AB-4S AB-4SL AB-5BR X AB-5D X AB-5S X AB-6BRA Lower bedrock (AB-6BRL) scheduled to be installed by mid -October for purposes of vertical delineation. 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-9BR AB-9D AB-9S AL-1BR X AL -ID X AL -IS X AL-2BR AL-2BRL Lower bedrock (AL-2BRLL) scheduled to be installed by mid -October for purposes of vertical delineation. AL-2D AL-2S AL-3BR AL-3D AL-3S AL-4BR Lower bedrock (AL-4BRL) scheduled to be installed by mid -October for purposes of vertical delineation. AL-4D BG-1BRA X Note: BG-lBR has been abandoned and thus removed from the IMP. BG-1BRA was installed as replacement well. BG-ID X BG-1 S X BG-2BR X BG-2S X Marshall Steam Station Page 2 of 5 October 1, 2017 BG-3BR X BG-3D X BG-3S X GWA-lBR X GWA-lD X GWA-1S X GWA-2DA Note: GWA-2D 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 only. GWA-13S GWA-14D GWA-14S GWA-15S X MS-8 MS-10 X MS-11 MS-13 Marshall Steam Station Page 3 of 5 October 1, 2017 MW-1 MW-lOD X MW-lOS X MW-11D MW-llS 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 October 1, 2017 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 October 1, 2017 Revised Mayo Steam Electric Plant Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides Regional Office Notes ABMW-1 X ABMW-2 ABMW-2BR ABMW-2BRL ABMW-3 ABMW-3S ABMW-4 X ABMW-4BR ABMW-4D BG-I X BG-2 X CW-1 CW-1D CW-2 X CW-2D X CW-3 CW-4 CW-5 CW-6 X MW-1 OBR 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 New installation MW-18BR New installation MW-19D New installation MW-19BR New installation MW-2 MW-3 X MW-3BR MW-4 Mayo Steam Electric Plant Pagel of 2 October 1, 2017 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 October 1, 2017 Revised Riverbend Steam Station Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides X Regional Office Notes AB -ID Measure pH, if still >10, not sample. AB -IS AB-2D AB-2S AB-8D AB-8S BG-1DA 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 C-1BRUA C-1 S C-2D C-2S GWA-10BRU Measure pH, if still >10, not sample. GWA-10S GWA-11D 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 Measure pH, if still >10, not sample. Riverbend Steam Station Page I of 3 October 1, 2017 GWA-20DA GWA-20S GWA-21BR GWA-21D GWA-21 S GWA-22BR-A X GWA-22D X GWA-22S X GWA-23BR Measure pH, if still >10, not sample. GWA-23DA GWA-23S GWA-2BR X GWA-2BRU X Measure pH, if still >10, not sample. GWA-2S X GWA-3BR GWA-3D GWA-3S-A GWA-4BR Measure pH, if still >10, not sample. GWA-4D X GWA-4S X GWA-5D GWA-5S GWA-6D X Measure pH, if still >10, not sample. 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-lD Riverbend Steam Station Page 2 of 3 October 1, 2017 MW-lS MW-2D MW-2S-A MW-3D MW-3S MW-4D MW-4S MW-5D MW-5S MW-6D MW-6S MW-7BRA X MW-7D X MW-7SR X MW-8D MW-8I MW-8S MW-9 X MW-9BRA X MW-9DA X 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 October 1, 2017 Revised Roxboro Steam Electric Plant Interim Monitoring Plan — Groundwater Only Wells to be Sampled Sample for Radionuclides X Regional Office Notes ABMW-1 X water level only ABMW-1BR 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 A13MW-7 water level only ABMW-7BR ABMW-7BRL BG-1 X BG-lBR X BG-1BRL water level only BG-1BRLR X New installation BG-2 X New installation CW-1 CW-2 X CW-2D X CW-3 CW-3D C W-4 CW-5 X GMW-10 GMW-11 GMW-6 X GMW-7 GMW-8 GMW-9 MW-1BR MW-2BR MW-3BR X Roxboro Steam Electric Plant Page 1 of 3 October 1, 2017 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-l0BR X MW-1lBR X MW-11D X New installation MW-12BR MW-13BR X MW-14BR X MW-15,BR 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 New installation MW-24BR MW-25BR MW-26BR MW-27BR New installation MW-28BR New installation MW-29BR New installation MW-30BR New installation MW-31BR New installation MW-32BR New installation MW-33BR New installation GPMW-1 S New installation GPMW-lD New installation Roxboro Steam Electric Plant Page 2 of 3 October 1, 2017 GPMW-lBR New installation GPMW-2D New installation GPMW-2BR New installation GPMW-3D New installation GPMW-3BR New installation 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 Roxboro Steam Electric Plant Page 3 of 3 October 1, 2017 Revised L.V. Sutton Energy Complex Interim Monitoring Plan— Groundwater Only Wells to be Sampled Sample for Radionuclides M Regional Office Notes AW-IC AW-2C AW-2D AW-3C X AW-4C X AW-5C AW-5D AW-6R-D Installed in 1st Qtr. 2017 to replace AW-6 AW-6R-E Installed in 1st Qtr. 2017 to replace AW-6E AW-7R-D Installed in 1 st Qtr. 2017 to replace AW-7D AW-08C AW-09C AW-09D MW-05C X MW-05CD X MW-05D X MW-05R-E Replaced MW-5E MW-7C MW-8 X MW-11 MW-12R Installed in 1st Qtr. 2017 to replace MW-12 MW-16D MW-19 MW-20 MW-20D MW-21C MW-22B MW-22 MW-23B MW-23C MW-23D X MW-23E X MW-24R-B MW-24R-C MW-27B MW-27C X MW-28B MW-28C MW-31R-C X Installed in 1st Qtr. 2017 to replace NM-31C L.V. Sutton Energy Complex Page 1 of 2 October 1, 2017 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 MW-39C X MW-39D X MW-40B MW-40C MW-40D MW-41E SMW-01C SMW-02C SMW-03C SMW-04C SMW-5C SMW-06C SMW-06D Minimum Parameters to be Analyzed Aluminum Boron Copper Mercury Selenium Thallium Alkalinity Cadmium Hexava lent 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 October 1, 2017 Revised W. H. Weathersnoon Power Plant Interim Monitorine Plan — Groundwater Onlv Wells to be Sampled Sample for Radionuclides M Regional Office Notes AW-01D AW-01I AW-01 S AW-02D AW-02S AW-03D AW-03I AW-03S BW-01 BW-02D BW-02I BW-02S X BW-03D X BW-03I X BW-03S 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 MW-55I X W. H. Weatherspoon Power Plant Page 1 of 2 October 1, 2017 PW-1 (DEP 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 W. H. Weatherspoon Power Plant Page 2 of 2 October 1, 2017