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Home My WebLink About1804_DukeMarshall_DALF_Interim Groundwater Monitoring and Reporting Request_FID1818480_20230927(' DUKE ENERGY-. September 27, 2023 North Carolina Department of Environmental Quality Division of Waste Management Solid Waste Section 2090 U.S. Highway 70 Swannanoa, NC 28778 Attn: Ms. Sarah Moutos (submitted electronically) 526 South Church St. Charlotte, NC 28202 Mailing Address P.O. Box 1006 Mail Code EC 13K. Charlotte, NC 28201-1006 Re: Request for Interim Change in Groundwater Compliance Monitoring and Reporting Dry Ash Landfill Phase I (Excavated) and Phase II Permit No.: 1804-INDUS-1983 Marshall Steam Station Terrell, North Carolina 28682 Dear Ms. Moutos: To support closure activities, six groundwater compliance monitoring and observation wells part of the Dry Ash Landfill Phase I (Excavated) and Phase II monitoring network have been abandoned. Remaining groundwater monitoring wells include one background well (MW-4) and one downgradient well (MW-1). Additionally, monitoring well MW-1 is a saprolite well that has become dry as result of ash basin decanting to support closure activities. The remaining compliance monitoring wells alone do not provide sufficient data to monitor and report on groundwater quality in the vicinity of the Dry Ash Landfill Phase I (Excavated) and Phase 11. Therefore, as an interim form of groundwater compliance monitoring and reporting for the Dry Ash Landfill Phase I (Excavated) and Phase II Duke Energy requests approval to use data from the site wide Coal Ash Management Act (CAMA) groundwater Interim/Effectiveness Monitoring Program (IMP/EMP) and provide the Solid Waste Section with the Marshall Annual Groundwater and Surface Water Monitoring Reports. The site wide CAMA network includes monitoring wells in areas downgradient of the Dry Ash Landfill Phase I (Excavated) and Phase 11, including the two remaining compliance monitoring wells, MW-1 and MW-4. This is proposed beginning in 2024 till the Dry Ash Landfill Phase II and ash basin closure activities, including construction of the stability features associated with the Dry Ash Landfill Phase II, are complete enough that groundwater monitoring wells can be installed to reestablish a compliance monitoring network for the facility. Attached to this request are the list of wells and parameters monitored on a semiannual and triannual basis part of the CAMA groundwater IMP/EMP. If you need additional information regarding this request do not hesitate to email or call me at Ashley.HealyQduke-energy.com or (717) 982-0986. Respectfully submitted, j4l-�Ai Ashley Healy, P.G. Environmental Services www.duke-energy.com Page 1 of 2 Attachments: Marshall IMP/EMP Semi-annual Wells and Parameters (Arcadis, 2022) Marshall IMP/EMP Tri-annual Wells and Parameters (Arcadis, 2022) cc (via e-mail): Claire Osborn, NCDEQ Sherri Stanley, NCDEQ Ed Mussler, NCDEQ Scott La Sala, Duke Energy Dan Zakary, Duke Energy Dee O'Brien, Duke Energy Tyler Hardin, Duke Energy Kim Witt, Duke Energy Ed Sullivan, Duke Energy www.duke-energy.com Page 2 of 2 04 ARCAD IS f U1[t. & Consultancy fornaturaland quilt sseu Table 1 Recommended Wells and Analytes - Semi -Annual Site -Wide Monitoring Groundwater Monitoring Optimization Evaluation Marshall Steam Station Terrell, North Carolina BG-01BRA Bedrock Be, B, Cd, Co, Fe, Li, Mn, Ni, Se, Sr, SO4, TDS, Ra (226+228) BG-01D Deep Be, B, Cd, Co, Fe, Li, Mn, Ni, Se, Sr, SO4, TDS, Ra (226+228) BG-01S Shallow Be, B, Cd, Co, Fe, Li, Mn, Ni, Se, Sr, SO4, TDS, Ra (226+228) GWA-12BR Bedrock Be, B, Cd, Co, Fe, Li, Mn, Ni, Se, Sr, SO4, TDS, Ra (226+228) GWA-12S Shallow Be, B, Cd, Co, Fe, Li, Mn, Ni, Se, Sr, SO4, TDS, Ra (226+228) Downgradient Wells (33 Wells) AB-01 BR Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS, Ra (226+228) AB-01 BRL Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS, Ra (226+228) AB-01 BRLL Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS AB-01 BRLLL Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS, Ra (226+228) AB-01 D Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS AB-01 S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS AB-02BR Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS AB-02S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS AL-01 BR Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS, Ra (226+228) AL-01 BRL Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS, Ra (226+228) AL-01 D Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS, Ra (226+228) AL-01 S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS CCR-09DA Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS, Ra (226+228) CCR-09S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS GWA-1 OD Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS GWA-10S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS GWA-11 BR Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS GWA-11 D Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS GWA-11 S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS GWA-15D Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS, Ra (226+228) GWA-15S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-01 Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-06D Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-06S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-07D Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS, Ra (226+228) MW-07S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-08D Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-08S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-09D Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-09S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-14BR Bedrock B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-14D Deep B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS MW-14S Shallow B, Co, Fe, Li, Mn, Ni, Sr, SO4, TDS Dry Ash Landfill (Phase II) (10 Wells) AL-02BR Bedrock B, Li, Mn, Se, Sr, SO4, TDS AL-02BRLL Bedrock B, Li, Mn, Se, Sr, SO4, TDS AL-02BRLLL Bedrock B, Li, Mn, Se, Sr, SO4, TDS AL-02D Deep B, Li, Mn, Se, Sr, SO4, TDS AL-02S Shallow B, Li, Mn, Se, Sr, SO4, TDS AL-03BR Bedrock B, Li, Mn, Se, Sr, SO4, TDS AL-03D Deep B, Li, Mn, Se, Sr, SO4, TDS AL-04BR Bedrock B, Li, Mn, Se, Sr, SO4, TDS AL-04BRL Bedrock B, Li, Mn, Se, Sr, SO4, TDS AL-04D Deep B, Li, Mn, Se, Sr, SO4, TDS Coal Pile Wells (2 Wells) CP-01 S Shallow CP-02S Shallow EML Acronyms and Abbreviations: B - boron Be - beryllium Cd - cadmium Co - cobalt Fe - iron Li - lithium Mn - manganese Ni - nickel Ra - total radium Se - selenium Sr - strontium SO4 - sulfate TDS - total dissolved solids Be, Cd, Co, Fe, Mn, Ni, SO4, TDS Be, Cd, Co, Fe, Mn, Ni, SO4, TDS Page 1 of 1 a GWA-139 • ! ~ ye-°P GWA-13DA M�-12D a� ewP _ K k i ILF-2D . _I `; . 1 • r � GWA-89 f- • GWA-BD •, �- N , � 8G-35 MW-4D ♦ ` 8G-3D , ! MW 4 /G r 5D . � •�.' � Px.Qo. �°� 8G-3BR •I ' . GWA-6S 8G-25 r r o GWA-6D 8G-2BR O MW-3 AB-13S ,5 AB-13D ^ AB-14D AB-14DU AB-145 AL- -0 OB-3 (MW-7) El1 AL-3 AL-3BR -4D 4BR BRL r L-2S L-2D L-28Rl8RL1 RLLIBRLLL MW-2 AB-12S AB-105 FAB 1 A8-105L AB-12D1BR AB-10DIBRlBRL AB-9S AB-9DIBR 5!' a �''� • 1 .. W` AB-21 S ` , - MW-11D K - •` y OB-1 A . AB-4S v p O MS-10 AB-55 AB-4D AB-5DU - AB-5D A8-3S AB-58R AB-3D -A .I O MS-11 •1 Lr CCR-2S CCR-2 D • • CP-25 � MS-13 CP-2D ♦ �a GP-2S GP-2D `♦ �% WA-2S ♦ GWA-2DA � GP-3S CP-35 GP-1 S 1 _ N. r GWA-75 GWA-7D 0 s MW-145 •� MW-1, W-14BWBRL WA-10 MS GWA-11S AL-15 GWA-10D GWA 11D AL-1D ► GWA-11BR =AL-1 BR •, AL-1 GWA-159 GWA-15D • MW-1 'Y4 u-MW-fiS a� ��•�'� M W-6D AB-1S CCR-98 AB-1 D CCR-9DA ' - AB-1 BRlBRL18RLLIBRLLL W-7S r MW-7D MW-BD MW-10D � AB-29 W-95 AB-2❑ l— - • `s, ,_NWAri AB-2BR� Notes: O Recommended EMP semi-annual monitoring well O Water level well; Comprehensive groundwater levels will be measured at these wells and at all semi-annual wells during one semi-annual event per year (but may be conducted during both semi-annual events) Table 5e Recommended Tri-Annual Wells and Analytes - All Area Wells P ARCAD I S OuiLta &Consultancy for natural anrE 6aiLtassets Groundwater Monitoring Optimization Evaluation Marshall Steam Station Terrell, North Carolina Field Parameter Dissolved Oxygen pH Oxidation -Reduction Potential Redox Potential (Eh) Specific Conductance Temperature Turbidity Water Level Laboratory Parameter Alkalinity Aluminum Antimony' Arsenic' Barium' Beryllium' Boron' Cadmium' Calcium Chloride Chromium (Hexavalent) Chromium (Total)' Cobalt' Fluoride Iron' Lithium Magnesium Manganese' Molybdenum' Nickel' Nitrate + Nitrite Potassium Selenium' Sodium Strontium' Sulfate Radium (226) Radium (228) Thallium' Total Dissolved Solids Total Organic Carbon Vanadium' mg/L SU mV mV pmhos/cm °C NTU ft mg/L pg/L pg/L pg/L pg/L pg/L pg/L pg/L mg/L mg/L pg/L pg/L pg/L mg/L pg/L pg/L mg/L pg/L pg/L pg/L mg/L mg/L pg/L mg/L pg/L mg/L pCi/L pCi/L pg/L mg/L mg/L Ng/L Footnotes: ' - Total analysis only. 2 - Radium (226 + 228) analyzed at subset of monitoring wells, as noted. Acronyms and Abbreviations: -- - not applicable mg/L - milligram per liter ° C - degress Celcius mV - millivolt ft - foot NTU - Nephelometric Turbidity Unit pg/L - microgram per liter pCi/L - picocurie per liter pg/mL - microgram per milliliter SU - standard unit pmhos/cm - micro -ohms per centimeter Multimeter Multimeter Multimeter Multimeter Multimeter Water Level Meter SM 2320B EPA 200.7 EPA 200.8 EPA 200.8 EPA 200.7 EPA 200.8 EPA 200.7 EPA 200.8 EPA 200.7 EPA 300.0 EPA 218.7 EPA 200.8 EPA 200.8 EPA 300.0 EPA 200.7 EPA 200.7 EPA 200.7 EPA 200.7 EPA 200.8 EPA 200.8 EPA 353.2 EPA 200.7 EPA 200.8 EPA 200.7 EPA 200.7 EPA 300.0 EPA 903.1 Modified EPA 904.0/SW846 9320 Modified EPA 200.8 SM 2540C / EPA 160.1 / ASTM D5907 SM5310C / EPA 9060A EPA 200.8 Page 1 of 4 Table 5e Recommended Tri-Annual Wells and Analytes - All Area Wells 00 ARCJaD I S Luftta &Consultancy fornatur buiLtssetsatand Groundwater Monitoring Optimization Evaluation Marshall Steam Station Terrell, North Carolina Well ID Groundwater Flow Zone Notes .ckaround Wells (20 Wells) BG-01 BRA BG-01 D BG-01 S BG-02BR BG-02S BG-03BR Bedrock -- -- -- -- -- -- -- -- Deep Shallow Bedrock Shallow Bedrock BG-03D Bedrock BG-03S Shallow GWA-04D Deep -- GWA-04S Shallow -- GWA-05D Deep -- GWA-05S Shallow -- GWA-06D Bedrock -- GWA-06S Shallow -- -- GWA-08D Bedrock GWA-08S Shallow GWA-12BR Bedrock GWA-12S Shallow MW-04 Shallow MW-04D Bedrock Upgradient Wells (15 Wells) GWA-02DA Deep GWA-03D Deep GWA-03S Shallow GWA-07D Deep GWA-07S Shallow -- -- -- -- -- -- -- -- -- -- GWA-09BR Bedrock -- GWA-12D Bedrock -- GWA-13DA Deep -- GWA-13S Shallow -- GWA-14D Deep -- GWA-14S Shallow -- MW-12D Deep -- MW-12S MW-13D MW-13S Wh Pore Water Wells (13 Wells) AB-03S AB-05S AB-10SL AB-12S AB-12SL Shallow -- -- -- -- -- -- Deep Shallow Ash Pore Water Ash Pore Water Ash Pore Water Ash Pore Water -- Ash Pore Water -- AB-14S Ash Pore Water AB-21S Ash Pore Water AL-03S Ash Pore Water AB-04S Ash Pore Water AB-04SL Ash Pore Water AB-08S Ash Pore Water AB-10S Ash Pore Water AB-13S Ash Pore Water -- -- -- -- -- -- -- -- Page 2 of 4 Table 5e Recommended Tri-Annual Wells and Analytes - All Area Wells 00 ARCJaD I S Luftta &Consultancy fornatur buiLtssetsatand Groundwater Monitoring Optimization Evaluation Marshall Steam Station Terrell, North Carolina hAsh Basin Groundwater Wells (19 Wells) AB-03D Bedrock -- AB-05BR Bedrock -- AB-05D Deep -- AB-05DU AB-08DU Shallow -- Shallow Bedrock -- -- AB-09BR AB-09D Bedrock -- AB-09S Shallow -- AB-10BR Bedrock -- AB-10BRL Bedrock -- AB-10D Bedrock -- AB-12BR Bedrock -- AB-12D Bedrock -- AB-14D Deep -- AB-14DU Shallow -- AB-21 D Deep AB-04D Deep AB-08D Bedrock AB-13D Bedrock Downgradient Wells (44 Wells) AB-01 BR Bedrock AB-01 BRL Bedrock AB-01 BRLL Bedrock AB-01 BRLLL Bedrock AB-01 D Deep -- -- -- -- -- -- -- -- -- -- AB-01 S Shallow AB-02BR Bedrock -- AB-02D Deep -- AB-02S Shallow -- AL-01 BR Bedrock -- AL-01 BRL Bedrock -- AL-01 D Deep -- AL-01 S Shallow -- CCR-01 D Deep -- CCR-01 S Shallow -- CCR-02D Deep -- CCR-02S Shallow -- CCR-03D Deep -- CCR-03S Shallow -- CCR-09DA Deep -- CCR-09S Shallow -- GWA-01 BR Bedrock -- GWA-01 D Deep -- GWA-01 S Shallow -- GWA-10D Deep -- GWA-10S Shallow -- GWA-11 BR Bedrock -- GWA-11 D Deep -- GWA-11 S Shallow -- GWA-15D Deep -- GWA-15S Shallow -- MW-01 Shallow -- MW-06D Deep -- MW-06S Shallow -- MW-07D Deep -- MW-07S Shallow -- MW-08D Bedrock -- MW-08S Shallow -- MW-09D Deep -- MW-09S Shallow -- MW-14BR Bedrock -- MW-14BRL Bedrock -- MW-14D Deep -- MW-14S Shallow -- Page 3 of 4 Table 5e Recommended Tri-Annual Wells and Analytes - All Area Wells 00 ARCJaD I S Luftta &Consultancy fornatur buiLtssetsatand Groundwater Monitoring Optimization Evaluation Marshall Steam Station Terrell, North Carolina Dry Ash Landfill (Phase II) (12 Wells) AL-02BR AL-02BRL AL-02BRLL AL-02BRLLL AL-02D AL-02S Bedrock -- Bedrock -- Bedrock -- Bedrock -- Deep -- Shallow -- AL-03BR Bedrock -- AL-03D Deep -- AL-04BR Bedrock -- AL-04BRL Bedrock -- AL-04D Deep -- MW-07 (OB-03) Mal Pile Wells CP-01 BR Shallow Bedrock -- -- CP-01 D Deep -- CP-01 S Shallow -- -- CP-02D CP-02S CP-03D CP-03S gypsum Area Wells (6 Wells) GP-01 D GP-01 S GP-02D GP-02S Deep Shallow -- Deep -- Shallow Peedee Upper -- -- Upper Surficial -- Peedee Upper -- Lower Surficial -- -- GP-03D Upper Surficial GP-03S Upper Surficial Industrial Landfill Wells (2 W ILF-02D Deep ILF-02S Shallow PVSF-01 BR Bedrock PVSF-01 D Deep PVSF-01 S Shallow PVSF-04BR Bedrock PVSF-04D Deep PVSF-04S Shallow [Vater Level Wells (20 Wells) GWA-02S Shallow MW-11 D Deep MW-11S Shallow OB-01 (Ash Basin) Shallow AB-04S Ash Pore Water -- -- -- -- -- -- -- -- -- Water Level Only Water Level Only Water Level Only Water Level Only Water Level Only AB-04SL Ash Pore Water Water Level Only AB-08S Ash Pore Water Water Level Only AB-1 OS Ash Pore Water Water Level Only AB-13S Ash Pore Water Water Level Only AB-04D Deep Water Level Only AB-08D Bedrock Water Level Only AB-13D Bedrock Water Level Only MW-10D Deep Water Level Only MW-10S Shallow Water Level Only MW-02 MW-03 MS-08 MS-10 MS-11 MS-13 Shallow Water Level Only Shallow Water Level Only Shallow Water Level Only Shallow Water Level Only Shallow Water Level Only Shallow Water Level Only Footnotes: - Radium (226 + 228) analyzed at subset of monitoring wells, as noted. Acronyms and Abbreviations: -- - not applicable mg/L - milligram per liter ° C - degress Celcius mV - millivolt ft - foot NTU - Nephelometric Turbidity Unit pg/L - microgram per liter pCi/L - picocurie per liter pg/mL - microgram per milliliter SU - standard unit pmhos/cm - micro -ohms per centimeter Page 4 of 4 .fir ILF-25 •ILF-2D ;sic "Fl, r ♦' ♦♦ GWA-BD /t ♦ter-�'r♦ �' � , ` -♦ ' I, GWA-14S GWA-3S � ' GWA-14D GWA-3D I 1 I e i AB-13S AB-14 B-14DU MW-125 AB-14S GWA-135 a PVSF-4S {{y4°Po GWA-13DA PVSF 4BR tip o � PVSF-15 PVSF-1D PVSF-1BR GWA-1n GWA-12DIBR jtiv�J{{ - Mw-11S l MW-11D A•�~�O MS-8 N F 1 . a . c p , O MS-10 Y o ' I O MS-11 1 L O MS-13 OB-1 0 l 1 JMW-47D GWA-SD .� '� .- - �0.oPo'• BG-3D 1 MW- v � s P^iQo'�♦ BG-3BR GWA-6S BG-25 i. � � GWA-6D BG-2BR OF OB-3 (MW-7)ft AL-4 AL-4B AL-4BRL L-25 AL-2D L-2BRIBRL( BRLLIBRLLL ft-. AB-21S {i AB-21D ® AB-4S AB-4D AB-55 AB-46R AB-5DU a AB -SD AB-3 AB-5BR AB-3 CP-1 S ccR-2s cP-1D CCR-2D Pjj CP-1BR CCR-1 S CP-2s CCR-1D GP-2D GP-zs GP-2D WA-25 GWA-2DA GP-35 GP-3D CP-3S GP-15 CP-3D GP-1D - I Jc ,' GWA-7S GWA-7D SORROW AREA MW-14S --- ' MW-14BR/BRL GWA-10S AL-1S GWA-10D GWA-11D GWA-11S `"• AL-1D r GWA-11BR ...._a. - r.,r AL-1BR I �R ♦ 'C!y AL-1BR GWA-15S r via"h'Rf z"'��A MW- GWA-15D 1�� ' 11,�U n .. �♦ .. r M W-65 ♦ M W-6D I ♦ 3R .7'yY•,Zj.L ' AB-15 AB-1D CCR-9DA 4^ M1' AB-1 BRIBRUBRLLIBRLLL - , MW-75 MW-7D ; MW-10S MW-8S MW-1 OD MW-8D AB-2S AB-2D r�µWPY AB-2BR GWA-1 S CCR-35 GWA-1D CCR-3D GWA-1BR r r * Notes: 0 Recommended EMP tri-annual monitoring well 0 Water level well; Comprehensive groundwater levels will be measured at these wells and at all tri-annual wells during the tri-annual monitoring events