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Home My WebLink AboutNC0038377_Tables_20150902TABLE 1-1 SUMMARY OF REVISED WELL LOCATIONS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO NC Raleigh Regional Office - Mayo Steam Electric Plant Well/ General Location on Relocation, Approximate Distance Justification for Relocation, NCDENR Concurrence/ Boring ID Groundwater Assessment Addition, and Addition, or Deletion Comment Plan or Deletion? Direction of Relocation Saturated conditions and slope of land surface S13-4 East side of power plant area Relocation 200' south-southeast created unsafe conditions (unstable ground for drilling equipment; proximity to fence) S13-6 Southwest side of 1981 landfill Relocation 100' southwest Ease of access and concern about drilling into landfill debris MW-7S East of ash basin and north of Deletion Saprolite of sufficient thickness and saturation to railroad line discretely monitor was not observed MW-7D East of ash basin and north of Relocation 750' northeast Moved at request of NCDENR to be outside of Written concurrence in railroad line compliance boundary conditional approval letter MW-76R East of ash basin and north of Relocation 750' northeast Moved at request of NCDENR to be outside of Written concurrence in railroad line compliance boundary conditional approval letter East of ash basin and west of Saprolite of sufficient thickness and saturation to MW-9S railroad line between ash basin and Deletion discretely monitor was not observed Mao Lake East of ash basin and west of A transition zone/PWR of sufficient thickness and MW-9D railroad line between ash basin and Deletion saturation to discretely monitor was not observed Mao Lake MW-10S East side of power plant area Deletion Saprolite of sufficient thickness and saturation to discretely monitor was not observed MW-10D East side of power plant area Deletion A transition zone/PWR of sufficient thickness and saturation to discretely monitor was not observed Saturated conditions and slope of land surface MW-10BR East side of power plant area Relocation 200' south-southeast created unsafe conditions (unstable ground for drilling equipment; proximity to fence) MW-11S West side of Highway 501 Deletion Saprolite of sufficient thickness and saturation to discretely monitor was not observed MW-11D West side of Highway 501 Deletion A transition zone/PWR of sufficient thickness and saturation to discretely monitor was not observed Overhead utilities, underground utilities, proximity Verbal concurrence with MW-11BR West side of Highway 501 Relocation 500' north to US Highway ROW, and nearby slope instability relocation created unsafe conditions Verbal concurrence during site South side of property along Plant No water bearing zone was identified within the visit; possiblity of employing MW-12BR entrance road Deletion bedrock core after the 50 foot exploratory depth former production wells (DEP) into bedrock had been exceeded as bedrock background wells discussed MW-13S West side of Highway 501 Deletion Saprolite of sufficient thickness and saturation to discretely monitor was not observed MW-13D West side of Highway 501 Deletion A transition zone/PWR of sufficient thickness and saturation to discretely monitor was not observed MW-13BR West side of Highway 501 Relocation 300' northwest Moved to accommodate forthcoming US Highway Verbal concurrence with 501 expansion relocation MW-14S Northwest portion of property, near Deletion Saprolite of sufficient thickness and saturation to Mayo Lake Road discretely monitor was not observed MW-14D Northwest portion of property, near Deletion A transition zone/PWR of sufficient thickness and Mayo Lake Road saturation to discretely monitor was not observed MW-14BR Northwest portion of property, near Relocation 100' northwest Ease of access for large drill rig Mayo Lake Road MW-15S Peed property near NC/VA line Deletion Saprolite of sufficient thickness and saturation to discretely monitor was not observed MW-15D Peed property near NC/VA line Deletion A transition zone/PWR of sufficient thickness and saturation to discretely monitor was not observed MW-15BR Peed property near NC/VA line Relocation 100' southwest Limit tree cutting and land clearing on private property Safety considerations required that walking on ash Verbal concurrence with ABMW-1 West side of ash basin Relocation 150' southwest basin be limited in this area relocation during site visit discussion ABMW-01 was completed using a hand auger. Safety considerations prevented heavy equipment ABMW-1S West side of ash basin Deletion from working on the ash basin at this location; therefore, drilling/well installation into saprolite was not possible with hand auger Safety considerations precluded using heavy Verbal concurrence with ABMW-2 Central portion of ash basin Relocation 400' south equipment on this part of the ash basin. Drill rigs relocation during site visit were permitted on the ash harvest area discussion ABMW-2S Central portion of ash basin Deletion Saprolite of sufficient thickness and saturation to discretely monitor was not observed ABMW-2D Central portion of ash basin Deletion A transition zone/PWR of sufficient thickness and saturation to discretely monitor was not observed Safety considerations precluded using heavy Verbal concurrence with ABMW-3 South side of ash basin Relocation 400' southwest equipment on this part of the ash basin. Drill rigs relocation during site visit were permitted on the ash harvest area discussion Safety considerations precluded using heavy Verbal concurrence with ABMW-3S South side of ash basin Relocation 400' southwest equipment on this part of the ash basin. Drill rigs relocation during site visit were permitted on the ash harvest area discussion ABMW-4S South side of ash basin Deletion Saprolite of sufficient thickness and saturation to discretely monitor was not observed Prepared by: JAW Checked by: EMB P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\ReportTables\Table 1-1 Summary of Revised Well Locations MAYO.xlsx Page 1 of 1 TABLE 2-1 NPDES GROUNDWATER MONITORING REQUIREMENTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Well Nomenclature Parameter Description Frequency Aluminum Chloride Mercury Thallium Antimony Chromium Nickel TDS BG-1, BG-2, Arsenic Copper Nitrate Water Level CW-1, CW-1D, CW-2, CW-2D, April, July, and CW-3, CW-4, CW-5, CW-6 November Barium Iron pH Zinc Boron Lead Selenium Cadmium Manganese Sulfate Prepared by: JAW Checked by: RKD Notes: Constituent list adjusted in April 2015 to include additional parameters. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\TABLE 2-1 NDPES monitoring REVISED 8 18 2015.docx Page 1 of 1 TABLE 2-2 COMPLIANCE WELL 15A NCAC 02L EXCEEDANCES MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter pH Antimony Barium Boron Cadmium Chromium Iron Lead Manganese Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 1* 700 700 2 10 300 15 50 0.2* 500 0.3* Sample ID Sample Collection Date Analytical Results BG-01 10/31/2008 5.7 BE 1040 BE BE 36.9 65700 33.1 2270 0.35 BE BE BG-01 06/04/2009 BE 2.5 BE BE BE BE 2100 BE 131 BE BE BE BG-01 10/21/2009 5.3 4.2 BE BE BE 15.7 4610 BE 166 BE BE BE BG-01 04/22/2010 5.6 BE BE BE BE BE 2000 BE BE BE BE BE BG-01 12/06/2010 5.9 BE BE BE BE 15.3 1080 BE BE BE BE BE BG-01 04/20/2011 5.5 BE BE BE BE BE 702 BE BE BE BE BE BG-01 07/11/2011 5.5 BE BE BE BE 40.1 1040 BE BE BE BE BE BG-01 11/03/2011 5.5 BE BE BE BE BE BE BE BE BE BE BE BG-01 04/04/2012 5.6 BE BE BE BE BE 388 BE BE BE BE BE BG-01 07/09/2012 5.3 BE BE BE BE 20 640 BE BE BE BE BE BG-01 11/05/2012 5.4 BE BE BE BE BE 526 BE 55.6 BE BE BE BG-01 04/10/2013 5.2 BE BE BE BE BE 323 BE BE BE BE BE BG-01 07/09/2013 5.4 BE BE BE BE BE 488 BE BE BE BE BE BG-01 11/13/2013 5.5 BE BE BE BE BE 412 BE BE BE BE BE BG-01 04/01/2014 5.4 BE BE BE BE BE BE BE BE BE BE BE BG-01 07/18/2014 5.5 BE BE BE BE BE 325 BE BE BE BE BE BG-01 11/12/2014 5.5 BE BE BE BE BE 466 BE BE BE BE BE BG-01 04/13/2015 5.5 BE BE BE BE BE 409 BE BE BE BE BE BG-01 07/07/2015 5.6 BE BE BE BE BE 557 BE BE BE BE 4.94 BG-02 12/02/2010 BE BE BE BE BE BE 2660 BE 198 BE BE BE BG-02 04/20/2011 6.3 BE BE BE BE BE 439 BE 71.4 BE BE BE BG-02 07/11/2011 6.3 BE BE BE BE 10.2 559 BE 64.2 BE BE BE BG-02 11/03/2011 6.3 BE BE BE BE BE 312 BE BE BE BE BE BG-02 04/04/2012 6.3 BE BE BE BE BE BE BE BE BE BE BE BG-02 07/09/2012 6.3 BE BE BE BE BE 460 BE 54.9 BE BE BE BG-02 11/05/2012 6.3 BE BE BE BE BE 759 BE BE BE BE BE BG-02 04/10/2013 6.3 BE BE BE BE BE 646 BE 111 BE BE BE BG-02 07/09/2013 6.4 BE BE BE BE BE 1130 BE 248 BE BE BE BG-02 11/13/2013 6.4 BE BE BE BE BE 841 BE 177 BE BE BE BG-02 04/01/2014 6.4 BE BE BE BE BE 943 BE 226 BE BE BE BG-02 07/18/2014 6.4 BE BE BE BE BE 1010 BE 244 BE BE BE BG-02 11/12/2014 6.3 BE BE BE BE BE 647 BE 180 BE BE BE BG-02 04/13/2015 6.3 BE BE BE BE BE 435 BE 150 BE BE BE BG-02 DUP 04/13/2015 6.3 BE BE BE BE BE 546 BE 155 BE BE BE BG-02 07/07/2015 BE BE BE BE BE BE 467 BE 135 BE BE 5.88 CW-01 12/06/2010 BE BE BE BE BE BE BE BE 104 BE BE BE CW-01 04/20/2011 5.9 BE BE BE BE BE BE BE BE BE BE BE CW-01 07/12/2011 5.9 BE BE BE BE BE BE BE BE BE BE BE CW-01 11/04/2011 6.0 BE BE BE BE BE BE BE BE BE BE BE CW-01 04/05/2012 6.2 BE BE BE BE BE BE BE BE BE BE BE CW-01 07/09/2012 5.8 BE BE BE BE BE BE BE BE BE BE BE CW-01 11/06/2012 5.9 BE BE BE BE BE BE BE BE BE BE BE CW-01 04/10/2013 5.7 BE BE BE BE BE BE BE BE BE BE BE CW-01 07/09/2013 5.6 BE BE BE 2.19 BE BE BE BE BE BE BE CW-01 11/13/2013 5.9 BE BE BE BE BE BE BE BE BE BE BE CW-01 04/01/2014 5.8 BE BE BE BE BE BE BE BE BE BE BE CW-01 07/16/2014 5.6 BE BE BE BE BE BE BE BE BE BE BE CW-01 11/12/2014 5.7 BE BE BE BE BE BE BE BE BE BE BE CW-01 04/13/2015 5.7 BE BE BE BE BE 608 BE BE BE BE BE CW-01 07/08/2015 5.5 BE BE BE BE BE BE BE BE BE BE 0.543 CW-01D 12/02/2010 BE BE BE BE BE 11 BE BE 422 BE BE BE CW-01D 11/06/2012 BE BE BE BE BE BE BE BE 52.6 BE BE BE CW-01D 07/08/2015 BE BE BE BE BE BE BE BE BE BE BE 1.09 CW-02 12/01/2010 6.1 BE BE BE BE BE BE BE BE BE BE BE CW-02 04/20/2011 5.3 BE BE BE BE BE BE BE BE BE BE BE CW-02 DUP 04/20/2011 5.3 BE BE BE BE BE BE BE BE BE BE BE CW-02 07/11/2011 5.3 BE BE BE BE BE BE BE BE BE BE BE CW-02 11/03/2011 5.5 BE BE BE BE BE BE BE BE BE BE BE CW-02 04/05/2012 5.6 BE BE BE BE BE BE BE 107 BE BE BE CW-02 07/10/2012 5.3 BE BE BE BE BE BE BE 184 BE BE BE CW-02 11/05/2012 5.5 BE BE BE BE BE BE BE 186 BE BE BE CW-02 04/10/2013 5.3 BE BE BE BE BE BE BE 140 BE BE BE CW-02 DUP 04/10/2013 5.3 BE BE BE BE BE BE BE 138 BE BE BE CW-02 07/09/2013 5.2 BE BE BE BE BE BE BE 360 BE BE BE CW-02 11/13/2013 5.3 BE BE 785 BE BE BE BE 535 BE BE BE CW-02 04/01/2014 5.3 BE BE BE BE BE BE BE 135 BE BE BE P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 2-2 Compliance Well 2L Exceedances.xlsx Page 1 of 3 TABLE 2-2 COMPLIANCE WELL 15A NCAC 02L EXCEEDANCES MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter pH Antimony Barium Boron Cadmium Chromium Iron Lead Manganese Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 1* 700 700 2 10 300 15 50 0.2* 500 0.3* Sample ID Sample Collection Date Analytical Results CW-02 DUP 04/01/2014 5.3 BE BE BE BE BE BE BE 131 BE BE BE CW-02 07/16/2014 5.0 BE BE BE BE BE BE BE 260 BE BE BE CW-02 11/12/2014 5.0 BE BE 878 BE BE BE BE 1020 BE BE BE CW-02 DUP 11/12/2014 5.0 BE BE 863 BE BE BE BE 1000 BE BE BE CW-02 04/14/2015 5.0 BE BE BE BE BE BE BE 170 BE BE BE CW-02 07/07/2015 5.1 BE BE 804 BE BE BE BE 393 BE BE BE CW-02D 12/02/2010 BE BE BE BE BE BE 370 BE 102 BE BE BE CW-02D 04/20/2011 BE BE BE BE BE BE BE BE 156 BE BE BE CW-02D 07/12/2011 BE BE BE BE BE BE 522 BE 254 BE BE BE CW-02D DUP 07/12/2011 BE BE BE BE BE BE 498 BE 258 BE BE BE CW-02D 11/03/2011 BE BE BE BE BE BE BE BE 250 BE BE BE CW-02D 04/05/2012 BE BE BE BE BE BE 347 BE 270 BE BE BE CW-02D 07/10/2012 BE BE BE BE BE BE 392 BE 231 BE BE BE CW-02D 04/10/2013 6.1 BE BE BE BE BE BE BE BE BE BE BE CW-02D 07/09/2013 BE BE BE BE BE BE BE BE 107 BE BE BE CW-02D 11/13/2013 BE BE BE BE BE BE BE BE 89 BE BE BE CW-02D 04/01/2014 6.3 BE BE BE BE BE BE BE 169 BE BE BE CW-02D 07/16/2014 6.3 BE BE BE BE BE BE BE 102 BE BE BE CW-02D 11/12/2014 6.4 BE BE BE BE BE BE BE 95 BE BE BE CW-02D 04/14/2015 6.2 BE BE BE BE BE BE BE 123 BE BE BE CW-02D 07/07/2015 6.1 BE BE BE BE BE BE BE 81 BE BE 0.585 CW-03 12/02/2010 BE BE BE BE BE BE 908 BE 481 BE BE BE CW-03 04/21/2011 6.4 BE BE BE BE BE BE BE 305 BE BE BE CW-03 07/12/2011 6.3 BE BE BE BE BE BE BE 201 BE BE BE CW-03 11/04/2011 6.3 BE BE BE BE BE BE BE BE BE BE BE CW-03 04/04/2012 BE BE BE BE BE BE BE BE 254 BE BE BE CW-03 DUP 04/04/2012 BE BE BE BE BE BE BE BE 258 BE BE BE CW-03 07/09/2012 6.3 BE BE BE BE BE BE BE 120 BE BE BE CW-03 04/10/2013 6.4 BE BE BE BE BE BE BE 153 BE 520 BE CW-03 07/09/2013 6.3 BE BE BE BE BE BE BE 61 BE 510 BE CW-03 11/14/2013 6.4 BE BE BE BE BE BE BE BE BE BE BE CW-03 04/01/2014 BE BE BE BE BE BE BE BE 100 BE BE BE CW-03 07/17/2014 6.4 BE BE BE BE BE BE BE BE BE BE BE CW-03 11/13/2014 6.4 BE BE BE BE BE BE BE BE BE BE BE CW-03 04/14/2015 6.4 BE BE BE BE BE BE BE BE BE BE BE CW-03 07/06/2015 BE BE BE BE BE BE BE BE BE BE BE 1.41 CW-04 12/02/2010 6.4 BE BE BE BE BE 784 BE BE BE BE BE CW-04 04/21/2011 6.0 BE BE BE BE BE BE BE BE BE BE BE CW-04 07/12/2011 6.0 BE BE BE BE BE BE BE BE BE BE BE CW-04 11/04/2011 6.2 BE BE BE BE BE BE BE BE BE BE BE CW-04 04/04/2012 6.1 BE BE BE BE BE BE BE BE BE BE BE CW-04 07/10/2012 6.1 BE BE BE BE BE BE BE BE BE BE BE CW-04 11/06/2012 6.2 BE BE BE BE BE BE BE BE BE BE BE CW-04 04/10/2013 6.0 BE BE BE BE BE BE BE BE BE BE BE CW-04 07/09/2013 5.9 BE BE BE BE BE BE BE BE BE BE BE CW-04 11/14/2013 6.2 BE BE BE BE BE BE BE BE BE BE BE CW-04 04/01/2014 6.1 BE BE BE BE BE BE BE BE BE BE BE CW-04 07/17/2014 5.8 BE BE BE BE BE BE BE BE BE BE BE CW-04 11/13/2014 6.0 BE BE BE BE BE BE BE BE BE BE BE CW-04 04/14/2015 5.9 BE BE BE BE BE BE BE BE BE BE BE CW-04 07/06/2015 5.9 BE BE BE BE BE BE BE BE BE BE 1.02 CW-05 12/06/2010 BE BE BE BE BE BE BE BE 609 BE BE BE CW-05 04/21/2011 BE BE BE BE BE BE 343 BE 583 BE BE BE CW-05 07/12/2011 BE BE BE BE BE BE 485 BE 629 BE BE BE CW-05 11/04/2011 BE BE BE BE BE BE 546 BE 600 BE BE BE CW-05 04/05/2012 BE BE BE BE BE BE BE BE 387 BE BE BE CW-05 07/10/2012 BE BE BE BE BE BE 597 BE 622 BE BE BE CW-05 11/06/2012 BE BE BE BE BE BE 588 BE 557 BE BE BE CW-05 04/10/2013 BE BE BE BE BE BE BE BE 549 BE BE BE CW-05 07/09/2013 6.4 BE BE BE BE BE 589 BE 595 0.361 BE BE CW-05 11/13/2013 BE BE BE BE BE BE 936 BE 706 BE BE BE CW-05 04/01/2014 BE BE BE BE BE BE 799 BE 650 BE BE BE CW-05 07/17/2014 BE BE BE BE BE BE 1080 BE 672 BE BE BE CW-05 11/13/2014 BE BE BE BE BE BE 988 BE 660 BE BE BE P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 2-2 Compliance Well 2L Exceedances.xlsx Page 2 of 3 TABLE 2-2 COMPLIANCE WELL 15A NCAC 02L EXCEEDANCES MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter pH Antimony Barium Boron Cadmium Chromium Iron Lead Manganese Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 1* 700 700 2 10 300 15 50 0.2* 500 0.3* Sample ID Sample Collection Date Analytical Results CW-05 04/14/2015 BE BE BE BE BE BE 731 BE 696 BE BE BE CW-05 07/06/2015 BE BE BE BE BE BE 1060 BE 785 BE BE BE CW-06 12/01/2010 BE BE BE BE BE BE 1220 BE 1090 BE BE BE CW-06 04/20/2011 BE BE BE BE BE BE 1260 BE 1160 BE BE BE CW-06 07/12/2011 BE BE BE BE BE BE 1330 BE 1160 BE BE BE CW-06 11/04/2011 BE BE BE BE BE BE 1780 BE 1310 BE BE BE CW-06 04/05/2012 BE BE BE BE BE BE 1520 BE 1270 BE BE BE CW-06 07/10/2012 BE BE BE BE BE BE 1440 BE 1260 BE 524 BE CW-06 DUP 07/10/2012 BE BE BE BE BE BE 1480 BE 1410 BE 531 BE CW-06 11/05/2012 BE BE BE BE BE BE 1780 BE 1280 BE 528 BE CW-06 04/10/2013 BE BE BE BE BE BE 1720 BE 1440 BE 550 BE CW-06 07/09/2013 BE BE BE BE BE BE 1580 BE 1400 BE 550 BE CW-06 DUP 07/09/2013 BE BE BE BE BE BE 1540 BE 1380 BE 550 BE CW-06 11/13/2013 BE BE BE BE BE BE 1870 BE 1390 BE 520 BE CW-06 DUP 11/13/2013 BE BE BE BE BE BE 1740 BE 1360 BE 520 BE CW-06 04/01/2014 BE BE BE BE BE BE 1330 BE 1300 BE 550 BE CW-06 07/16/2014 BE BE BE BE BE BE 1390 BE 1350 BE 550 BE CW-06 DUP 07/16/2014 BE BE BE BE BE BE 1380 BE 1350 BE 550 BE CW-06 11/12/2014 BE BE BE BE BE BE 1410 BE 1380 BE 520 BE CW-06 04/14/2015 BE BE BE BE BE BE 1370 BE 1300 BE 540 BE CW-06 07/06/2015 BE BE BE BE BE BE 2040 BE 1450 BE 560 BE CW-06 DUP 07/06/2015 BE BE BE BE BE BE 2060 BE 1470 BE 570 BE Prepared by: BER/SRW Checked by: JAW Notes: F--�- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ug/I = microgram per liter mg/I = milligrams per liter S.U. = Standard Units * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. BE = indicates concentration was below the 15A NCAC 02L Standard, April 1, 2013. DUP = Duplicate P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.II CSA Reporting\Tables\Report Tables\Table 2-2 Compliance Well 2L Exceedances.xlsx Page 3 of 3 TABLE 3-1 ASH, ROCK, AND SOIL COMPOSITION Fly Ash* Bottom Ash* Rock** Soil*** Aluminum, mg/kg 70,000 - 140,000 59,000 - 130,000 9,800 - 96,000 15,000 - 100,000 Calcium, mg/kg 7,400 - 150,00 5,700 - 150,000 6,000 - 83,000 1,500 - 62,000 Iron, mg/kg 34,000 - 130,000 40,000 - 160,000 8,800 - 95,000 7,000 - 50,000 Silicon, mg/kg 160,000 - 270,000 160,000 - 280,000 57,000 - 380,000 230,000 - 390,000 Magnesium, mg/kg 3,900 - 23,000 3,400 - 17,000 700 - 56,000 1,000 - 15,000 Potassium, mg/kg 6,200 - 21,000 4,600 - 18,000 4,000 - 45,000 4,500 - 25,000 Sodium, mg/kg 1,700 - 17,000 1,600 - 11,000 900 - 34,000 1,000- 20,000 Sulfur, mg/kg 1,900 - 34,000 BDL - 15,000 200 - 42,000 840 - 1,500 Titanium, mg/kg 4,300 - 9,000 4,100 - 7,200 200 - 5,400 1,000 - 5,000 Antimony, mg/kg BDL - 16 All BDL 0.08 - 1.8 BDL - 1.3 Arsenic, mg/kg 22 - 260 2.6 - 21 0.50 - 14 2.0 - 12 Barium, mg/kg 380 - 5,100 380 - 3,600 67 - 1,400 200 - 1,000 Beryllium, mg/kg 2.2 - 26 0.21 - 14 0.10 - 4.4 BDL - 2.0 Boron, mg/kg 120 - 1,000 BDL - 335 0.2 - 220 BDL - 70 Cadmium, mg/kg BDL - 3.7 All BDL 0.5 - 3.6 BDL - 0.5 Chromium, mg/kg 27 - 300 51 - 1,100 1.9 - 310 15 - 100 Copper, mg/kg 62 - 220 39 - 120 10 - 120 5.0 - 50 Lead, mg/kg 21 - 230 8.1 - 53 3.8 - 44 BDL - 30 Manganese, mg/kg 91 - 700 85 - 890 175 - 1,400 100 - 1,000 Mercury, mg/kg 0.01 - 0.51 BDL - 0.07 0.1 - 2.0 0.02 - 0.19 Molybdenum, mg/kg 9.0 - 60 3.8 - 27 1.0 - 16 All BDL Nickel, mg/kg 47 - 230 39 - 440 2.0 - 220 5.0 - 30 Selenium, mg/kg 1.8- 18 BDL - 4.2 0.60 - 4.9 BDL - 0.75 Strontium, mg/kg 270 - 3,100 270 - 2,000 61 - 890 20 - 500 Thallium, mg/kg BDL - 45 All BDL 0.1 - 1.8 0.20 - 0.70 Uranium, mg/kg BDL - 19 BDL - 16 0.84 - 43 1.2 - 3.9 Vanadium, mg/kg BDL - 360 BDL - 250 19 - 330 20 - 150 Zinc, mg/kg 63 - 680 16 - 370 25 - 140 22 - 99 Notes: BDL- Below Detection Limit *Source for most fly ash data is EPRI CP-INFO Database3. Beryllium„ Thallium, Mercury (bottom ash only) and Boron (bottom ash only) are from the EPRI PISCES Database **Source for rock data is US Geological Survey National Geochemical database.' ***Source for most soils data is Shacklette and Boerngen (1984)8; Cadmium and Thallium data are from Smith et al (2005).9 mg/kg = miligram per kilogram Table was obtained from the EPRI Technical update- Coal Combustion Products- Environmental Issue, Coal Ash: Characteristics, management, and Environmental Issues, Table 2, pg 5, EPRI, 2009. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 C5A Reporting\Tables\Report Tables\Table 3-1 Ash, Rock, and Soil Composition.xlsx Page 1 of 1 TABLE 4-1 SUMMARY OF PLANT WATER SUPPLY WELLS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC APPROX. TOTAL STATIC SURFACE TAGGED WELL WELL WATER LEVEL OTHER WELL SPECIFIC DATA CASING DEPTH DEPTH (FT BGS) (FT BGS) (FT BGS) 6-inch steel surface casing; 1-inch black poly drop pipe; DEP-1 — 36 130.25 12.17 1.5 HP "household" submersible pump 6-inch steel surface casing; 1.25-inch galvanized drop pipe; Diamond pump (5 HP); pump and motor assembly DEP-2 — 21 238.17 15.65 is 6 feet long; pump installed 10/31/95 (likely replacement for original pump); "soft tag" on bottom ... well is likely a few feet deeper 6-inch steel surface casing; 2-inch galvanized drop pipe; LDEP-3] — 21 250 21.23 Gould pump (5 HP); pump and motor assembly is 7 feet long Prepared by: JAW Checked by: EMB Notes: FT BGS = Feet below ground surface P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 4-1 Summary of WSW.xlsx Page 1 of 1 TABLE 6-1 EXPLORATION AND SAMPLING PLAN - SOIL MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Permeability (UD/Shelby Ash, Soil, or Rock 01 Prepared by: KDF Checked by: EMB P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-1 Explor_Sam p_Plan_Solids.xlsx Page 1 of 1 TABLE 6-2 EXPLORATION AND SAMPLING PLAN - WATER MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Well ID Rnd 1 Rnd 2 GWAP Speciation U/Ra Screened Interval (ft. bgs) Aquifer Rnd 1 Rnd 2 GWAP Comp Fe � Mn Fe Mn Cr As Rnd 1 Rnd 2 BG-1 X X 42.0-52.0 Bedrock BG-2 X X X 25.4-44.9 Transition CW-1 X X 15.5-25.0 Transition CW-11D X X 30.1-39.9 Bedrock CW-2 X X X 7.7-17.5 Transition CW-21D X X X X 45.6-55.4 Bedrock CW-3 X X 17.0-31.8 Transition CW-4 X X 35.0-39.8 Bedrock CW-5 X X 36.3-41.1 Bedrock CW-6 X X 72.1-76.9 Bedrock MW-2 X X 38.0-48.0 Bedrock MW-3 X X X X 8.0-18.0 Alluvium MW-4 X X 35.0-55.0 Bedrock MW-3BR X X 69.0-74.0 Bedrock MW-5BR X X 58.0-63.0 Bedrock MW-71D X X 19.5-30.5 Transition MW-7BR X X 66.75-77.5 Bedrock MW-8BR X X 62.0-67.0 Bedrock MW-9BR X X 48.0-58.0 Bedrock MW-10BR X X 48.0-58.0 Bedrock MW-11BR X X 85.0-95.0 Bedrock MW-12S X X X 40.0-50.0 Saprolite MW-12D X X X X X 87.0-97.0 Transition MW-13BR X X X X 89.0-99.0 Bedrock MW-14BR X X 29.0-34.0 Bedrock MW-16S X X X X X 5.0-7.5 Alluvium MW-16D X X X X X 29.0-39.0 Transition MW-16BR X X X X X 49.0-59.0 Bedrock ABMW-3 X X X X 35.3-40.5 Ash ABMW-3S X X X X 50.0-60.0 Saprolite ABMW-4 X X X X 48.0-53.2 Ash ABMW-4D X X X X 55.8-61.0 Transition ABMW-4BR X X X X 98.7-108.5 Bedrock ABMW-2 X X X X 34.0-39.2 Ash ABMW-2BR X X X X 94.0-104.0 Bedrock ABMW-1 X X X X X X 2.8-13.3 Ash Notes: l.reatea Dy: tivib l.neCKea Dy: u1v1Y ft. bgs - feet below ground surface Revised by: EMB Rechecked by: JAW GWAP - field parameters, inorganics and anions/cations from Table 6-4 Comp - NPDES compliance parameters Rnd- Round MW-06BR, MW-085, MW-08D and MW-15BR were not included because they are piezometers P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-2 Exploration and Sampling Plan- WATER.xlsx Page 1 of 1 TABLE 6-3 SOIL, SEDIMENT, AND ASH ANALYTICAL METHODS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC INORGANIC COMPOUNDS UNITS METHOD Aluminum mg/kg EPA 6010C Antimony mg/kg EPA 6020A Arsenic mg/kg EPA 6020A Barium mg/kg EPA 6010C Beryllium mg/kg EPA 6010C Boron mg/kg EPA 6010C Cadmium mg/kg EPA 6020A Calcium mg/kg EPA 6010C Chloride mg/kg EPA 9056A Chromium mg/kg EPA 6010C Cobalt mg/kg EPA 6020A Copper mg/kg EPA 6010C Iron mg/kg EPA 6010C Lead mg/kg EPA 6020A Magnesium mg/kg EPA 6010C Manganese mg/kg EPA 6010C Mercury mg/kg EPA Method 7470A/7471B Molybdenum mg/kg EPA 6010C Nickel mg/kg EPA 6010C Nitrate as Nitrogen mg/kg EPA 9056A pH Su EPA 9045D Potassium mg/kg EPA 6010C Selenium mg/kg EPA 6020A Sodium mg/kg EPA 6010C Strontium mg/kg EPA 6010C Sulfate mg/kg EPA 9056A Thallium (low level) (SPLP Extract only) mg/kg EPA 6020A Total Organic Carbon mg/kg EPA 9060 Vanadium mg/kg EPA 6020A Zinc mg/kg EPA 6010C Sediment Specific Samples Cation exchange capacity meg/100g EPA 9081 Particle size distribution % Percent solids % Percent organic matter % EPA/600/R-02/069 Redox potential I mV JFaulkner et al. 1898 Prepared by: RBI Checked by: TCP Revised by: EMB Rechecked by: JAW Notes• 1. Soil samples to be analyzed for Total Inorganics using USEPA Methods 6010/6020 and pH using USEPA Method 9045, as noted 2. Ash samples to be analyzed for Total Inorganics using USEPA Methods 6010/6020 and pH using USEPA Method 9045; select ash samples will also be analyzed for leaching potential using SPLP Extraction Method 1312 in conjunction with USEPA Methods 6010/6020. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-3 Soil, Sediment and Ash Analytical Methods.xlsx Page 1 of 1 TABLE 6-4 ASH PORE WATER, GROUNDWATER, SURFACE WATER, AND SEEP ANALYTICAL METHODS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO NC Parameter I Reportinq Limits Units I Method FIELD PARAMETERS H NA SU Field Water Quality Meter Specific Conductance NA µS/cm Field Water Quality Meter Temperature NA °C Field Water guality Meter Dissolved Oxygen NA m L Field Water Quality Meter Oxidation Reduction Potential NA mV Field Water Quality Meter Turbidity NA I NTU I Field Water Quality Meter Ferrous Iron INA I mq/L I Field Test Kit INORGANICS Aluminum 0.005 m L EPA 200.7 or 6010C Antimony 0.001 m L EPA 200.8 or 6020A Arsenic 0.001 m L EPA 200.8 or 6020A Barium 0.005 m L EPA 200.7 or 6010C Beryllium 0.001 m L EPA 200.8 or 6020A Boron 0.05 m L EPA 200.7 or 6010C Cadmium 0.001 m L EPA 200.8 or 6020A Chromium 0.001 m L EPA 200.7 or 6010C Cobalt 0.001 m L EPA 200.8 or 6020A Copper 0.005 m L EPA 200.7 or 6010C Iron 0.01 m L EPA 200.7 or 6010C Lead 0.001 m L EPA 200.8 or 6020A Manganese 0.005 m L EPA 200.7 or 6010C Mercury low level 0.000012 m L EPA 245.7 or 1631 Molybdenum 0.005 m L EPA 200.7 or 6010C Nickel 0.005 m L EPA 200.7 or 6010C Selenium 0.001 m L EPA 200.8 or 6020A Strontium 0.005 m L EPA 200.7 or 6010C Thallium low level 0.0002 m L I EPA 200.8 or 6020A Vanadium low level 0.0003 m L 1 EPA 200.8 or 6020A Zinc 0.005 m L EPA 200.7 or 6010C RADIONUCLIDES Radium 226 11 1 pCi/L 1EPA 903.1 Modified Radium 228 13 1 PQ/L JEPA 904.0 SW846 9320 Modified Uranium 233 234 236 238 Varies by Isotope u ml- ISW846 3010A 6020A ANIONS/CATIONS Alkalinity as CaCO3 20 m L SM 2320B Bicarbonate 20 m L SM 2320 Calcium 0.01 m L EPA 200.7 Carbonate 20 m L SM 2320 Chloride 0.1 m L EPA 300.0 or 9056A Magnesium 0.005 m L EPA 200.7 Methane 0.1 m L RSK 175 Nitrate as Nitrogen 0.023 m -N L EPA 300.0 or 9056A Potassium 0.1 m L EPA 200.7 Sodium 0.05 m L EPA 200.7 Sulfate 0.1 m L EPA 300.0 or 9056A Sulfide 0.05 L M450OS-D Total Dissolved Solids 25 M 2540C Total Or anic Carbon 0.1 i��ISM M 5310 Total Suspended Solids 2 2450D ADDITIONAL GROUNDWATER CONSTITUENTS Arsenic S eciation Vendor Specific m L IC-ICP-CRC-MS Chromium S eciation Vendor Specific m L IC-ICP-CRC-MS Iron SiDeciation IVendor Specific m L IC-ICP-CRC-MS Man anese S eciation Vendor Specific m L IC-ICP-CRC-MS Prepared by: RBI Checked by: TCP Revised by: EMB Rechecked by: JAW Notes: 1. Select constituents will be analyzed for total and dissolved concentrations. NA indicates not applicable. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-4 ASH PORE WATER, GROUNDWATER, SURFACE WATER, AND SEEP ANALYTICAL METHODS.xlsx Page 1 of 1 TABLE 6-5 WELL CONSTRUCTION DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC IDENTIFICATION DATE INSTALLED MONITORING ZONE MATERIAL DIAMETER (INCHES) NORTHING (FEET) EASTING (FEET) MEASURING POINT TOC ELEVATION (Feet- MSL) GROUND SURFACE ELEVATION (FEET- MSL) DTW FROM TOC'(FEET BGS) WATER LEVEL ELEVATION (FEET- MSL) BORING D(FEET3 (FEET BGS) SURFACE CASING DEPTHS (FEET BGS) TOTAL WELL z3 DEPTH' (FEET BGS) MEASURED WELL DEPTH i (FEET TOC) SCREENED INTERVAL s (FEET BGS) TOP OF SCREEN ELEVATION (FEET- MSL) BOTTOM OF SCREEN ELEVATION (FEET- MSL) Ash Basin ABMW-01 6/2/2015 Ash PVC 2.00 1012988.38 2029253.96 483.81 481.11 5.88 477.93 13.30 NA 13.30 15.65 2.80 13.30 478.31 467.81 ABMW-02 5/31/2015 Ash PVC 2.00 1012778.26 2030477.81 493.90 490.68 12.34 481.56 41.50 NA 39.20 NM 34.00 39.20 456.68 451.48 ABMW-02BR 6/3/2015 Bedrock PVC 2.00 1012781.97 2030476.42 493.85 490.65 11.10 482.75 130.00 0-41.0 106.00 NM 94.00 104.00 396.65 386.65 ABMW-03 5/20/2015 Ash PVC 2.00 1012714.21 2030856.72 500.17 497.34 17.15 483.02 40.50 NA 40.50 NM 35.30 40.50 462.04 456.84 ABMW-03S 5/27/2015 Saprolite PVC 2.00 1012718.52 2030858.24 500.30 497.33 17.26 483.04 68.00 0-43.0 61.00 NM 50.00 60.00 447.33 437.33 ABMW-04 5/31/2015 Ash PVC 2.00 1012345.36 2030478.85 491.44 488.76 6.33 485.11 60.00 NA 53.20 56.20 48.00 53.20 440.76 435.56 ABMW-04D 5/31/2015 Transition Zone PVC 2.00 1012350.06 2030467.97 491.50 488.68 6.44 485.06 64.50 0-54.5 64.50 63.80 55.80 61.00 432.88 427.68 ABMW-04BR 6/4/2015 Bedrock PVC 2.00 1012348.07 2030473.02 491.61 488.62 8.19 483.42 108.50 0-60.0 108.50 RM 98.70 108.20 389.92 380.42 GAP Wells MW-03BR 2/10/2015 Bedrock PVC 2.00 1015654.79 2031277.75 438.24 435.53 16.41 421.83 77.00 NA 75.10 76.35 68.77 74.00 366.76 361.53 MW-05BR 1/30/2015 Bedrock PVC 2.00 1015146.30 2029179.66 511.40 508.74 9.46 501.94 67.00 NA 65.00 RM 58.00 63.00 450.74 445.74 MW-06BR (piezometer) 4/13/2015 Bedrock PVC 2.00 1014756.09 2033040.31 463.99 461.70 56.84* 407.146* 100.00 NA 100.00 RM 90.00 100.00 371.70 361.70 MW-07D 4/25/2015 Transition Zone PVC 2.00 1014307.45 2034169.17 453.94 451.17 9.48 444.46 32.50 NA 32.50 32.70 19.50 30.40 431.67 420.67 MW-07BR 4/24/2015 Bedrock PVC 2.00 1014311.86 2034175.46 453.50 451.21 7.56 445.94 77.50 NA 77.50 79.60 66.80 77.50 384.46 373.71 MW-08S (piezometer) 2/16/2015 Saprolite PVC 2.00 1014446.92 2034603.67 466.87 466.94 29.85 437.02 30.08 NA 30.08 30.20 25.10 30.10 441.90 436.90 MW-08D (piezometer) 2/16/2015 Transition Zone PVC 2.00 1014443.85 2034599.43 466.89 467.04 33.36 433.53 41.00 NA 41.00 38.30 33.30 38.50 433.77 428.54 MW-08BR 2/14/2015 Bedrock PVC 2.00 1014440.25 2034593.99 466.99 467.27 34.45 432.54 86.50 0-46.5 67.67 RM 61.80 67.00 405.47 400.27 MW-09BR 4/11/2015 Bedrock PVC 2.00 1013360.32 2033864.48 495.39 492.85 24.97 470.42 66.00 NA 61.00 NM 48.00 58.00 444.85 434.85 MW-10BR 2/25/2015 Bedrock PVC 2.00 1011436.41 2032770.90 513.39 513.47 13.82 499.57 65.50 NA 65.50 57.60 48.00 58.00 465.47 455.47 MW-11BR 4/24/2015 Bedrock PVC 2.00 1010083.75 2027499.40 527.36 524.34 39.31 488.05 95.00 NA 95.00 NM 84.30 94.40 440.09 429.90 MW-12S 4/29/2015 Saprolite PVC 2.00 1008653.91 2029202.47 587.38 587.48 30.78 556.60 56.00 NA 51.00 RM 39.50 49.50 547.98 537.98 MW-12D 4/28/2015 Transition Zone PVC 2.00 1008654.13 2029191.43 588.02 588.17 31.12 556.90 97.00 NA 97.00 RM 87.00 97.00 501.17 491.17 MW-13BR 4/15/2015 Bedrock PVC 2.00 1013587.37 2027633.00 528.83 526.67 33.36 495.47 107.00 NA 100.00 100.71 88.80 99.00 437.87 427.97 MW-14BR 2/5/2015 Bedrock PVC 2.00 1015432.97 2028964.70 520.75 517.76 16.14 504.61 46.40 NA 35.40 36.87 29.00 34.00 488.76 483.76 MW-15BR (piezometer) 5/12/2015 Bedrock PVC 2.00 1016021.83 2031813.20 460.92 460.94 58.24 402.68 78.50 NA 64.00 62.64 52.60 62.50 407.94 397.94 MW-16S 5/8/2015 Alluvium PVC 2.00 1015654.53 2032640.89 371.11 367.94 4.19 366.92 8.50 NA 8.50 10.59 5.00 7.60 363.04 360.34 MW-16D 5/8/2015 Transition Zone PVC 2.00 1015659.09 2032643.26 371.21 367.74 5.69 365.52 39.00 NA 39.00 41.44 28.70 38.90 339.07 328.81 MW-16BR 5/8/2015 Bedrock PVC 2.00 1015664.50 2032645.73 371.30 367.83 5.89 365.41 65.00 0-47.2 1 59.50 1 62.26 1 48.70 59.00 1 319.13 308.87 Previously Installed Wells BG-1 10/15/2008 Bedrock PVC 2.00 2028480.40 1012000.52 540.11 537.04 29.85 510.26 NA 52.00 55.20 42.00 52.00 495.04 485.04 BG-2 9/28/2010 Transition Zone PVC 2.00 2028799.48 1010809.99 542.66 539.84 31.50 511.16 53.00 NA 53.00 48.40 25.40 44.90 514.44 494.94 CW-1 11/9/2010 Transition Zone PVC 2.00 2032714.46 1012696.54 489.88 486.96 17.68 472.20 25.50 NA 25.50 28.82 15.50 25.00 471.46 461.96 CW-1D 11/8/2010 Bedrock PVC 2.00 2032715.65 1012703.55 490.96 488.31 19.03 471.93 40.40 NA 40.40 43.65 30.10 39.90 458.21 448.41 CW-2 11/11/2010 Transition Zone PVC 2.00 2032238.71 1015043.98 389.00 386.56 13.71 375.29 18.00 NA 18.00 20.47 7.70 17.80 378.86 368.81 CW-2D 11/11/2010 Bedrock PVC 2.00 2032245.02 1015046.88 389.53 386.93 14.24 375.29 55.90 NA 55.90 58.55 45.60 55.40 341.33 331.53 CW-3 11/16/2010 Transition Zone PVC 2.00 2031278.02 1015647.59 437.68 435.27 15.80 421.88 32.30 NA 32.30 34.76 17.00 31.80 418.27 403.47 CW-4 11/12/2010 Bedrock PVC 2.00 2030436.27 1015911.44 451.31 448.76 23.61 427.70 40.30 NA 39.98 42.81 35.00 39.80 413.76 408.96 CW-5 11/15/2010 Bedrock PVC 2.00 2029182.29 1015162.23 509.60 507.21 8.07 501.53 43.00 NA 43.00 44.03 36.30 41.10 470.91 466.11 CW-6 11/11/2010 Bedrock PVC 2.00 2033046.08 1014743.82 462.83 RS 12.02 450.81 77.40 NA 77.40 80.56 72.10 76.90 363.17 358.37 MW-2 10/14/2008 Bedrock PVC 2.00 1015359.31 2030912.32 461.23 459.18 26.12 435.11 48.00 NA 48.00 50.12 38.00 48.00 421.18 411.18 MW-3 10/14/2008 Alluvium PVC 2.00 1014955.04 2032010.00 384.00 RS 6.68 377.32 18.00 NA 18.00 19.93 8.00 18.00 374.00** 364.00** MW-4 10/15/2008 Bedrock PVC 2.00 1013846.48 2032346.28 522.77 519.46 26.16 496.61 55.00 NA 55.00 59.05 35.00 55.00 484.46 464.46 P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-5 Well Construction Data.xlsx Page 1 of 2 TABLE 6-5 WELL CONSTRUCTION DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC IDENTIFICATION DATE INSTALLED MONITORING ZONE MATERIAL DIAMETER (INCHES) NORTHING (FEET) EASTING (FEET) MEASURING POINT TOC ELEVATION (Feet- MSL) GROUND SURFACE ELEVATION (FEET- MSL) DTW FROM TOC' FEET ( BGS) WATER LEVEL ELEVATION (FEET- MSL) BORING D(FEET3 (FEET BGS) SURFACE CASING DEPTHS (FEET BGS) TOTAL WELL zs DEPTH' (FEET BGS) MEASURED WELL DEPTH i (FEET TOC) SCREENED INTERVAL s (FEET BGS) TOP OF SCREEN ELEVATION (FEET- MSL) BOTTOM OF SCREEN ELEVATION (FEET- MSL) Previously Installed Piezometers P1 1983 Earthen Dam PVC 2.00 1015210.58 2030732.42 475.86 473.43 32.09 443.77 ? ? ? 51.22 ? ? ? ? P1A 1983 Earthen Dam PVC 2.00 1015207.52 2030735.62 475.00 473.38 35.19 439.81 ? ? ? 36.40 ? ? ? ? P2 1983 Earthen Dam PVC 2.00 1014965.67 2031226.56 458.65 455.77 44.96 413.69 ? ? ? 49.66 ? ? ? ? P2A 1983 Earthen Dam PVC 2.00 1014968.75 2031221.26 458.62 456.17 Dry Dry ? ? ? 18.00 ? ? ? ? P3 1983 Earthen Dam PVC 2.00 1014648.01 2031793.01 446.99 443.69 52.58 394.41 ? ? ? 67.84 ? ? ? ? P3A 1983 Earthen Dam PVC 2.00 1014650.72 2031787.93 445.69 443.39 50.83 394.86 ? ? ? 51.34 ? ? ? ? P4 1983 Earthen Dam PVC 2.00 1014521.83 2031950.40 454.57 452.59 37.55 417.02 ? ? ? 64.15 ? ? ? ? P4A 1983 Earthen Dam PVC 2.00 1014524.33 2031947.13 454.99 452.70 36.15 418.84 ? ? ? 36.17 ? ? ? ? Notes: BGS - Below ground surface NA - Not applicable MSL - Mean sea level NM - Not measured 1-Well depths and depth to water (DTW) measured by SynTerra, June 17, 2015 2 - "Boring Depth" is the total depth of soil boring; "Total Well Depth" is the depth to the bottom of the filter pack 3 - Values measured during well installation ? - No boring logs available for previously installed piezometers *Water level was still recharging during 24-Hour water level reading ** Estimated until ground surface elevation is resurveyed Monitoring well coordinate and elevation data for newly installed wells from surveys provided by McKim & Creed, completed by 6/24/15 PVC- Polyvinyl chloride RS - Needs to be resurveyed RM - Needs to be remeasured Prepared by: EMB Checked By: DH Revised by: EMB Rechecked by: JAW P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-5 Well Construction Data.xlsx Page 2 of 2 TABLE 6-6 WATER LEVEL MEASUREMENTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Identification Date Measured Measured Well Depth (Feet TOC) Measured Depth to Water (Feet TOC) Water Level (Feet, MSL) BG-1 6/17/2015 55.20 29.85 510.26 BG-2 6/17/2015 48.40 31.50 511.16 CW-1 6/17/2015 28.82 17.68 472.20 CW-1D 6/17/2015 43.65 19.03 471.93 CW-2 6/17/2015 20.47 13.71 375.29 CW-2D 6/17/2015 58.55 14.24 375.29 CW-3 6/17/2015 34.76 15.80 421.88 CW-4 6/17/2015 42.81 23.61 427.70 CW-5 6/17/2015 44.03 8.07 501.53 CW-6 6/17/2015 80.56 12.02 450.81 MW-2 6/17/2015 50.12 26.12 435.11 M W-3 6/17/2015 19.93 6.68 377.32 MW-4 6/17/2015 59.05 26.16 496.61 MW-03BR 6/17/2015 76.35 17.92 420.32 MW-05BR 6/17/2015 RM 9.46 501.94 MW-06BR (piezometer) 6/17/2015 RM 56.84 407.15 MW-07D 6/17/2015 32.70 9.48 444.46 MW-07BR 6/17/2015 79.60 7.56 445.94 MW-08S (piezometer) 6/17/2015 30.20 29.85 437.02 MW-08D (piezometer) 6/17/2015 38.30 33.36 433.53 MW-08BR 6/17/2015 RM 34.45 432.54 MW-09BR 6/17/2015 NM 24.97 470.42 MW-10BR 6/17/2015 57.60 13.82 499.57 MW-11BR 6/17/2015 NM 39.31 488.05 MW-12S 6/17/2015 RM 30.78 556.60 MW-12D 6/17/2015 RM 31.12 556.90 MW-13BR 6/17/2015 100.71 33.36 495.47 MW-14BR 6/17/2015 36.87 16.14 504.61 MW-15BR (piezometer) 6/17/2015 62.64 58.24 402.68 MW-16S 6/17/2015 10.59 4.19 366.92 MW-16D 6/17/2015 41.44 5.69 365.52 MW-16BR 6/17/2015 62.26 5.89 365.41 ABM W-01 6/17/2015 15.65 5.88 477.93 ABMW-02 6/17/2015 NM 12.34 481.56 ABMW-02BR 6/17/2015 NM 11.10 482.75 ABMW-03 6/17/2015 NM 17.15 483.02 ABMW-03S 6/17/2015 NM 17.26 483.04 ABMW-04 6/17/2015 56.20 6.33 485.11 ABMW-04D 6/17/2015 63.80 6.44 485.06 ABMW-04BR 6/17/2015 RM 8.19 483.42 P-1 6/17/2015 51.22 32.09 443.77 P-1A 6/17/2015 36.40 35.19 439.81 P-2 6/17/2015 49.66 44.96 413.69 P-2A 6/17/2015 18.00 DRY DRY P-3 6/17/2015 67.84 52.58 394.41 P-3A 6/17/2015 51.34 50.83 394.86 P-4 6/17/2015 64.15 37.55 417.02 P-4A 6 17 2015 36.17 36.15 418.84 Notes: DRY = Dry well NM = Not measured TOC= Top of Casing MSL = Mean Sea Level RM - Needs to be remeasured Prepared by: RAG Checkec by: DMY Revised by: EMB Rechecked by: JAW P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-6 Water Level ElevationsTable 6-6 Water Level ElevationsWater level elevation Page 1 of 1 TABLE 6-7 HORIZONTAL GROUNDWATER GRADIENTS AND FLOW VELOCITIES MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC r Ash Basin Groundwater Gradients Direction Data Points Gradient (ft per ft) Velocity (ft per yr) Saprolite NE MW-12S to ABMW-03S 0.017 1.73 NE ABMW-03S to MW-16S 0.034 3.83 to 4.80 Transition Zone NE MW-12D to ABMW-04D 0.018 4.99 to 8.23 NE ABMW-04D to MW-16D 0.030 5.43 to 8.95 Bedrock IL NE ABMW-04BR to MW-16BR 1 0.030 0.11 to 1.35 Prepared by: RAG Checked by: EMB Note: ft = feet yr = year Water level measurements used for these calculations were collected on June 17, 2015 P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-7 Horizontal Groundwater Gradients and Flow Velocities Page 1 of 1 TABLE 6-8 VERTICAL HYDRAULIC GRADIENTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Well ID Hydraulic Gradient ftper ft Flow Direction ABMW-02 to AMBW-02BR 1.91E-02 Up ABMW-03 to ABMW-03S 1.29E-03 Up ABMW-04 to ABMW-04BR 3.20E-02 Down CW-1 to CW-1D 2.01E-02 Down CW-2 to CW-2D 1.50E-15 Down CW-3 to MW-03BR 1.11E-03 Down CW-5 to MW-05BR 2.04E-02 Up MW-07D to MW-07BR 3.15E-02 Up MW-08S to MW-08BR 2.08E-01 Down MW-12S to MW-12D 6.43E-03 Up MW-16S to MW-16BR 3.17E-02 Down P-1 to P-1A 2.83E-01 Up P-2 to P-2A DRY Unknown P-3 to P-3A 2.99E-02 Down P-4 to P-4A 6.41E-02 Down Prepare by: RAG Checked by: EMB Notes: Revised by: EMB Rechecked by: JAW ft= Feet DRY = P-2A (the deeper of the piezometer pair) was completely dry P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-8 Vertical Hydraulic Gradients Page 1 of 1 TABLE 6-9 IN -SITU HYDRAULIC CONDUCTIVITY RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Bedrock Well ID Slug Test Slug Test Number Hydraulic Conductivity cm/sec Hydraulic Conductivity ft/da Measured GeMeanric Measured GeMeanric ABMW-02BR PK-SI Test 1 4.97E-04 3.09E-04 1.41E+00 8.75E-01 PK-SO Test 1 1.92E-04 5.43E-01 ABMW-04BR Slug -Out Test 1 3.34E-06 -- 9.46E-03 -- MW-03BR Slug In Test 1 3.20E-05 2.24E-05 9.07E-02 6.35E-02 Test 2 3.03E-05 8.58E-02 Slug Out Test 1 1.16E-05 3.29E-02 MW-05BR Slug In Test 1 5.89E-05 4.44E-05 1.67E-01 1.26E-01 Test 2 4.89E-05 1.39E-01 Slug Out Test 1 3.52E-05 9.98E-02 Test 2 3.82E-05 1.08E-01 MW-06BR DRY MW-07BR PK-SI Test 1 6.10E-04 -- 1.73E+00 -- MW-08BR Slug In Test 1 4.21E-05 3.00E-05 1.19E-01 8,50E-02 Slug In Test 2 2.05E-05 5.82E-02 Slug Out Test 1 2.81E-05 7.95E-02 SlugOut Test 2 3.33E-05 9.44E-02 MW-09BR Slug -Out Test 1 7.91E-06 -- 2.24E-02 -- MW-10BR Slug -Out Test 1 3.12E-06 -- 8.84E-03 -- MW-11BR PK-SI Test 1 1.98E-03 1.74E-03 5.62E+00 4.93E+00 PK-SI Test 2 1.22E-03 3.46E+00 PK-SO Test 1 1.90E-03 5.37E+00 PK-SO Test 2 1.99E-03 5.66E+00 MW-13BR PK-SI Test 1 5.71E-04 -- 1.62E+00 -- MW-14BR Slug In Test 1 1.55E-05 1.27E-05 4.39E-02 3.59E-02 Test 2 1.04E-05 2.94E-02 MW-15BR PK-SI Test 1 1.62E-04 1.81E-04 4.59E-01 5.14E-01 PK-SO Test 1 2.03E-04 5.76E-01 MW-16BR Slug -Out Test 1 1.12E-06 -- 3.17E-03 -- GEOMETRIC MEAN 6.37E-05 1.81E-01 HIGHEST CONDUCTIVITY 1.99E-03 I 5.66E+00 LOWEST CONDUCTIVITY 1.12E-06 I 3.17E-03 Ash Basin Well ID Slug Test Slug Test Number Hydraulic Conductivity (cm sec) Hydraulic Conductivity ft/da Measured Geometric Mean Measured Geometric Mean ABMW-01 Slug Out Test 2 1.45E-03 -- 4.12E+00 -- ABMW-02 Slug Out Test 1 1.69E-05 -- 4.79E-02 -- ABMW-03 Slug -Out Test 1 4.16E-05 -- 1.18E-01 -- FABMW-04 Slug Out Test 1 1.73E-04 1.88E-04 4.91E-01 5.34E-01 Slug Out Test 2 2.04E-04 5.80E-01 GEOMETRIC MEAN 1.29E-04 3.67E-01 HIGHEST CONDUCTIVITY 1.45E-03 I 4.12E+00 LOWEST CONDUCTIVITY 1.69E-05 I 4.79E-02 P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-9 In -Situ Hydraulic ConductivitiesSummary Results by Unit Page 1 of 2 TABLE 6-9 IN -SITU HYDRAULIC CONDUCTIVITY RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Alluvium Well ID Slug Test Slug Test Number Hydraulic Conductivity cm/sec Hydraulic Conductivity ft/da Measured GeMeanric Measured GeMeanric MW-16S Slug -Out Test 1 6.09E-06 -- 1.73E-02 -- GEOMETRIC MEAN -- -- HIGHEST CONDUCTIVITY -- -- LOWEST CONDUCTIVITY -- -- Saprolite Well ID Slug Test Slug Test Number Hydraulic Conductivity cm/sec Hydraulic Conductivity ft/da Measured GeMeanric Measured GeMeanric ABMW-03S Slug Out Test 1 1.60E-04 1.61E-04 4.54E-01 4.55E-01 Slug Out Test 2 1.61E-04 4.55E-01 Slug Out Test 3 1.61E-04 4.56E-01 MW-08S DRY MW-12S Slug Out Test 1 7.80E-06 -- 2.21E-02 -- GEOMETRIC MEAN HIGHEST CONDUCTIVITY LOWEST CONDUCTIVITY 7.54E-05 2.14E-01 1.61E-04 4.56E-01 7.80E-06 2.21E-02 Transition Zone Well ID Slug Test Slug Test Number Hydraulic Conductivity cm/sec Hydraulic Conductivity ft/da Measured GeMeanric Measured GeMeanric ABMW-04D Slug Out Test 1 2.07E-05 -- 5.88E-02 -- MW-07D Slug Out Test 1 6.78E-06 -- 1.92E-02 -- MW-08D DRY MW-12D Slug Out Test 1 1.06E-03 -- 3.02E+00 -- MW-16D Slug Out Test 1 5.54E-04 4.68E-04 1.57E+00 1.33E+00 Test 2 6.86E-04 1.94E+00 Test 3 2.69E-04 7.63E-01 GEOMETRIC MEAN 1.58E-04 4.47E-01 HIGHEST CONDUCTIVITY 1.06E-03 3.02E+00 LOWEST CONDUCTIVITY 6.78E-06 1.92E-02 Prepared By: EB HJF Checked By: JJ HJF Notes: Rechecked by: EMB/DMY Slug tests were analyzed using the Hvorslev mathmatical model, unless where indicated. DRY - dry well PK-SI - Packer Test, Slug -In PK-SO - Packer Test, Slug Out cm/sec - centimeter per second ft/day - feet per day -- No statistics necessary, when only one slug test analyzed P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-9 In -Situ Hydraulic ConductivitiesSummary Results by Unit Page 2 of 2 TABLE 6-10 VERTICAL HYDRAULIC CONDUCTIVITY OF UNDISTURBED SOIL SAMPLES MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Depth Hydraulic Sample ID (feet BGS) Conductivity Sediment Type Comment (cm/sec) From To Gray and brown fine Residual saprolitic ABMW-02 39.0 41.5 6.6 x 10-8 to medium sandy schist directly below clay ash $ Brown and gray fine Residual soil directly ABMW-03 40.0 42.0 2.5 x 10 sandy clay below ash ABMW-03 3.0 4.9 a 7.9 x 10 Gray silty fine to Representative bottom coarse sand ash Reddish brown fine Background MW-12 5.0 6.2 2.7 x 10' sandy silt soil/saprolite upgradient of plant Light gray fine sandy Background saprolite/ MW-12 50.0 52.35 5 4.2 x 10 representative silt upgradient regolith Gray and brown fine Residual soil MW-13 2.5 4.75 6 1.1 x 10 sandy silt upgradient-west of ash basin Gray silty fine to Downgradient alluvium MW-16 5.0 6.65 6 8.5 x 10 coarse sand in MW-16S screened interval s Light brown fine Residual soil/saprolite SB-1 4.0 5.5 1.1 x 10 sandy clay NW of ash basin Brown silty fine to Representative soil/fill SB-7 0.3 2.8 5 1.0 X 10 medium sand near toe of ash basin dam Notes: BGS = below ground surface cm/sec = centimeter per second Prepared by: RBI Checked by: EMB Revised by: EMB Rechecked by: JAW Water level measurements used for these calculations were collected on June 17, 2015. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 6-10 Vertical Hydraulic Conductivity of Undisturbed Soil Page 1 of 1 TABLE 7-1 PHYSICAL PROPERTIES OF ASH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO NC Sample Depth (Feet BGS) Moisture Content (%) Gravel (%) Sand (%) Silt (%) Clay (%) Specific Gravity From To AB-01 39 40 37.3 1.6 59.5 35.3 3.6 2.234 ABMW-01 3.5 5 1.4 0.0 2.8 90.7 6.5 2.295 AB-02 24 25 41.6 0.5 60.4 37.3 1.8 2.154 AB-02BR * 14 15 6.8 7.1 49.8 33.2 9.9 2.785 AB-03 35 36 40.0 0.2 47.3 50.3 2.2 2.204 AB-04 23.5 25 27.4 0.0 1 18.5 72.8 8.7 2.204 Prepared by: EMB Checked by: KDF Notes: = Percent BGS = below ground surface * = Transcription error on chain -of -custody. Sample as collected in field was designated "ABMW-02BR". P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 7-1 Physical Properties of Ash.xlsx Page 1 of 1 TABLE 7-2 MINERALOGY OF ASH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO NC Sample ID Sand Silt Clay Quartz Biotite Mullite ABMW-01 (3.5-5) 3.3 88.8 8.0 36.5 0.5 62.9 ABMW-02 (28-30) 15.4 79.1 5.5 20.9 ND 79.1 ABMW-04 (17-19) 25.5 68.0 6.5 25.5 ND 74.5 Notes• %= percent ND= not detected Prepared by: EMB Revised by: EMB Checked by: KDF P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Repo rting\Tables\Report Tables\Table 7-2 Mineralogy of Ash.xlsx Page 1 of 1 TABLE 7-3 CHEMICAL PROPERTIES OF ASH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Percent Moisture pH at 25 Degrees C Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Thallium Total Organic Carbon Vanadium Zinc Reporting Units % S.U. mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg Soil RSL- Industrail Health NE NE 110000 47 3 22000 230 23000 98 NE NE NE 35 4700 82000 800 NE 2600 4 580 2200 NE NE 580 NE 70000 NE 1.2 NE 580 35000 Soil RSL - Residential Health NE NE 7700 3.1 0.68 1500 16 1600 7.1 NE NE NE 2.3 310 5500 400 NE 180 0.94 39 150 NE NE 39 NE 4700 NE 0.078 NE 39 2300 Soil RSL - Protection of Groundwater NE I NE NE 0.27 0.29 82 3.2 NE NE NE NE 180000 NE 46 NE 14 NE NE 0.1 NE NE NE NE 0.26 NE NE NE 0.14 NE NE NE Sample ID Sample Collection Date Analytical Results AB-01 (4-5) 03/19/2015 19.9 6.2 859 <3.1 <3.1 38.6 0.26 <3.1 <0.37 248 <311 2.2 <3.1 4.8 1100 <3.1 65.1 17.7 <0.0096 0.42 j 3.3 <31.1 116 <3.1 <61.5 11 <311 <3.1 10800 2.7 j 4.5 AB-01 (34.3-35) 03/19/2015 34.2 7.2 3530 <3.9 2.9 j 34.6 0.96 9.2 <0.46 517 <379 10.6 4.2 12.1 2230 4.8 206 9.4 <0.012 0.55j 7 <37.9 436 <3.9 53.9j 19.5 <379 <3.9 18000 19 8.5 AB-01 (48-50) 03/19/2015 30.7 7.3 3060 <3.5 2.6 j 34.7 0.64 5.9 <0.42 483 <352 8 3.4 j 8 1820 4 180 9.4 <0.011 0.63 j 5.4 <35.2 367 <3.5 55 j 17.9 <352 <3.5 39300 13.7 6.8 AB-02 (4-5) 03/18/2015 41.2 6.3 281 <4.4 <4.4 9.9 0.091 <4.4 <0.53 70.7 <416 0.86 <4.4 1.2 320 <4.4 25.4 j 1.7 <0.014 <0.88 1.1 <41.6 <88.3 <4.4 <88.3 2.9 <416 <4.4 12300 <4.4 1.1 j AB-02 (18-20) 03/18/2015 33.9 6.4 3200 <3.9 3.3 j 44.1 0.73 7.3 <0.46 551 <378 10.6 4.5 10.6 2840 7.4 212 24.1 <0.012 0.53j 7.2 <37.8 396 <3.9 81.5 25.4 200 j <3.9 23400 16.9 10.5 AB-02 (32.9-33.7) 03/18/2015 32.3 6.4 3460 <3.9 3.4 j 51.8 0.78 7.7 <0.47 632 <362 10.2 4.7 11.7 2420 5.3 231 22.6 <0.012 0.54j 7.2 <36.2 402 <3.9 92.2 28.9 216 j <3.9 15800 16.7 10.1 AB-03 (4-5) 03/18/2015 21.6 6.4 863 <3.3 13.3 38.7 0.2 2.6 j <0.4 377 <322 2 <3.3 3 1010 <3.3 58.1 11.9 <0.0097 0.38 j 2.6 <32.2 110 <3.3 <66.7 8 <322 <3.3 6630 2.9 j 2.1 AB-03 (21.6-23.4) 03/18/2015 27.6 6.4 3760 <3.4 3.3 j 41.1 0.93 7.3 <0.4 581 <350 13.3 4 12.9 2470 5.2 204 14.1 <0.011 0.59j 6.8 <35 451 <3.4 63j 20.6 326 j <3.4 15100 15 8.2 AB-04 (4-5) 03/17/2015 28 6.6 485 <3.5 <3.5 16.9 0.14 <3.5 <0.42 199 <344 1.9 <3.5 2.8 554 <3.5 36.2 37.7 <0.011 0.38 j 2.1 <34.4 63.7 j <3.5 <69.9 4.7 <344 <3.5 14500 <3.5 <7 AB-04 (33-35) 03/17/2015 28.8 8.0 9620 <3.5 13.4 80.9 2.6 31.3 <0.43 1150 <350 31.9 13.6 33.3 3290 17.8 388 21.1 <0.011 1.6 18.7 <35 895 <3.5 102 53 <350 <3.5 19400 63.6 24 AB-04 (33-35) DUP 03/17/2015 21.5 7.8 13400 <3.1 17 96.9 3.1 36.4 0.3j 1520 <314 39.4 19.7 40.6 3320 25.5 603 15.8 <0.01 2 25.7 <31.4 1560 <3.1 158 78.8 <314 <3.1 17100 112 39 AB-04 (53-55) 03/17/2015 39.9 7.8 8960 <4.3 SO 67.3 2.3 25.5 <0.51 1100 <418 24.5 12.9 33.1 2860 14.5 497 13.6 <0.014 1.2 18.5 <41.8 1230 <4.3 119 60.6 <418 <4.3 21000 64.7 19 ABMW-01 (1-1.5) 06/02/2015 40.8 10.4 6960 <8.7 16.6 150 2.1 27.4 <1 2070 <425 25 7.6 j 37.9 2240 13 561 18.4 <0.014 <4.3 14.3 <42.5 1010 <8.7 <433 71.8 <425 <8.7 85100E46 18.8 ABMW-Ol (11.5-12) 06/02/2015 34.7 8.2 7960 <7.8 26.2 152 1.9 27.4 <0.94 2260 <381 26.9 8.3 34.6 2710 13.5 712 31.3 <0.013 <3.9 14.6 <38.1 1100 <7.8 <392 111 <381 <7.8 49200 21.9 Prepared by: BE LAM Checked by: KLS Notes: Bold color highlighted concentrations indicate highest exceedance of the EPA Mid -Atlantic Risk Assessment regional screening levels for soil, June 2015, for the category listed below: 0 - Soil RSL - Industrial Health - Soil RSL - Residential Health 0 - Soil RSL - Protection of Groundwater DUP = Duplicate / = percent S.U. = Standard Unit NE = Not established mg/kg = milligram per kilogram < = concentration not detected at or above the reporting limit j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. 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Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 7-3 Chemical Properties of Ash.xlsx Page 1 of 1 TABLE 7-4 LEACHING PROPERTIES OF ASH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Aluminum AntimonyArsenic Barium Beryllium y Boron Cadmium Calcium Chloride Chromium Cobalt Copper Co Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Thallium Vanadium Zinc Reporting Units ug/l ug/l ug/I u9/l u9/I ug/I ug/I mg/l mg/l ug/I ug/l mg/I u9/I u9/I mg/l ug/I ug/l ug/l ug/l m9/1 m9/1 ug/l mg/l m9/1 m9/1 u9/l ug/I mg/I 15A NCAC 02L Standard NE 1 * 10 700 4 * 100 2 NE 250 10 1 * 1 300 15 NE 50 1 NE 100 10 NE 20 NE NE 250 0.2 * 0.3 * 1 Sample ID Sample Collection Date Analytical Results AB-01 (48-50) 03/19/2015 252 7.1 11.9 285 <0.2 127 <0.08 4.5 <7.2 1.6 0.92 0.0046 <50 0.89 0.475 43 <0.2 4.3 2 ISO 0.657 1.5 1.6 0.0508 11.8 0.23 134 0.15 AB-02 (18-20) 03/18/2015 152 5 3.5 308 <0.2 119 <0.08 3.06 <7.6 1.8 0.89 0.003 <50 0.73 0.688 148 <0.2 2.2 4.4 308 0.643 1.9 2.11 0.0372 17.8 0.11 72.6 0.159 AB-03 (21.6-23.4) 03/18/2015 122 <0.5 1.1 303 <0.2 133 <0.08 5.87 <6.9 2.4 0.54 0.0029 <50 0.73 0.455 53.7 <0.2 9.2 2.2 236 0.679 <0.5 1.75 0.0392 19.9 <0.1 2.5 0.16 AB-04 (53-55) 03/17/2015 330 3.4 27 346 <0.2 208 <0.08 2.94 <41.6 1.3 <0.5 0.008 <50 0.68 0.617 19.5 <0.2 6.6 0.76 333 1.04 <0.5 1.59 0.089 12.6 <0.1 120 0.157 ABMW-01 (1-1.5) 06/02/2015 234 2 39.6 37.1 <0.2 659 <0.08 23.1 <8.4 18.3 <0.5 0.00065 j 24.3 j 0.16 0.058 2.6 <0.2 8 0.26 j <0.34 0.0988 0.55 1.18 0.15 19.9 <0.1 120 0.006 ABMW-01 (11.5-12) 06/02/2015 921 4.6 143 149 0.45 155 0.074j 6.46 <7.7 15.7 0.83 0.0108 302 1.9 1.58 8.1 <0.2 4.4 2.6 <0.31 0.304 0.96 1.62 0.192 4.1 0.31 107 0.0106 Notes: 0 -Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. NE = Not established ug/I = microgram per liter mg/I = milligram per liter < = concentration not detected at or above the reporting limit = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. Synthetic Precipitation Leaching Procedure, USEPA Method 1312 Prepared by: BE LAM Checked by: R D Rechecked by: EMS P:\Duke Energy Progress.1026\305. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 7-4 Leaching Properties of Ash.xlsx Page 1 of 1 TABLE 7-5 WHOLE ROCK METAL OXIDE ANALYSIS OF ASH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC AIZO3 BaO CaO Cr2O3 Fe2O3 K20 Mg0 MnO Na20 P205 S'02 SrO Ti02 V201 LOI Sample ID % % % % % % % % % % % % % % % ABMW-01 (3.5-5.0) 29.77 0.09 2.72 0.03 5.49 0.77 1.12 0.02 0.30 0.18 57.73 0.14 1.15 0.05 3.86 ABMW-02 (28.0-30.0) 36.94 0.06 1.05 0.04 3.75 0.65 0.95 0.01 0.17 0.03 59.04 0.06 1.14 0.07 2.60 ABMW-04 (17.0-19.0) 33.68 0.06 0.78 0.03 4.00 0.82 0.93 0.02 0.17 0.07 58.06 0.06 1.11 0.05 2.71 Notes• = percent < = concentration not detected at or above the reporting limit Prepared by: DMY Checked by: KDF Rechecked by: EMB P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 7-5 Whole Rock Metal Oxide Analysis of Ash.xlsx Page 1 of 1 TABLE 7-6 WHOLE ROCK ELEMENTAL ANALYSIS OF ASH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC As Cd Ce Co Cu Ga La Mo Ni Pb Sb Se Sn W Zn Zr Sample ID ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ABMW-01(3.5-5.0) 43 0.5 166 74 162 62 74 4 107 66 7 1 46 3 141 88 ABMW-02(28.0-30.0) 12 0.2 171 79 118 57 75 3 118 53 6 <1 36 3 113 68 ABMW-04 (17.0-19.0) 101 <0.2 1 156 1 64 1 107 1 39 1 69 2 95 1 45 5 <1 1 45 2 71 95 Notes: ppm = parts per million < = concentration not detected at or above the reporting limit Prepared by: DMY Checked by: KDF Rechecked by: EMB P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.II CSA Reporting\Tables\Report Tables\Table 7-6 Whole Rock Elemental Analysis of Ash.xlsx Page 1 of 1 TABLE 7-7 ASH PORE WATER ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Redox Water Ferrous Aluminum Aluminum Antimony Antimony Arsenic Arsenic Barium Barium Beryllium Beryllium Bi- Boron Boron Cadmium Cadmium Calcium Carbonate Chromium Chromium Analytical Parameter Assignment pH Level Temp Spec Cond DO ORP Eh Turbidity Iron Alkalinity carbonate Alkalinity Chloride DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT Alkalinity Reporting Units None S.U. ft Deg C umhos mg/I mV mV NTU mg/I mg/I ug/I ug/1 ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/l mg/I ug/I ug/I ug/1 ug/l mg/l mg/I mg/I ug/I ug/I ISA NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE 1* NE SO NE 700 NE 4* NE NE 700 NE 2 NE NE 250 NE 10 Sample ID Sample Field Parameters Analytical Results Collection Date ABMW-01 06/25/2015 Mixed anoxic 7.6 5.65 27 1009 0.32 -159 46 3.58 0.5 450 146 179 43 38 369 518 850 925 <1 <1 450 4530 4560 <1 <1 100 <10 16 <1 <1 ABMW-02 06/17/2015 Mixed 7.8 10.96 27 684 0.6 -187 18 2 0 290 23 61 <1 <1 874 1020 149 173 1.22 1.42 290 8100 9200 <1 <1 82.2 <10 12 <1 <1 (Oxi C-anoxic) ABMW-03 06/17/2015 Anoxic 6.6 17.15 23 527 0.2 -136 69 2.13 3 80 18 119 <1 <1 197 193 200 200 <1 <1 80 1960 1940 <1 <1 54.5 <10 76 <1 <1 ABMW-04 1 06/22/2015 Mixaed 7 5 5.96 25 818 0.6 238 443 1.35 0.5 370 21 71 <1 <1 496 499 449 448 <1 <1 370 5040 4930 <1 <1 120 <10 11 <1 <1 oxi c-noxic Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. mg- N/L = milligram nitrogen per liter ug/I = microgram per liter Spec Cord = Specific Conductance S.U. = Standard Unit ft = feet NE = Not established DO = Dissolved Oxygen Temp = Temperature DIS = Dissolved ORP = Oxidation Reduction Potential mg/1 = miligram per liter TOT = Total Deg C = Degrees Celsius my = millivolts NTU = nephelometric turbidty unit umhos/cm = micro mhos per centimeter = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. < = concentration not detected at or above the detection limit Prepared by: BER/LAM Checked by: KLS Rechecked by: EMB P:\Duke Energy Progres5.1026\105. Mayo Ash Basin GW Assessment Plan\l. 11 CSA Reporting\Tables\Report Tables\Table 7-7 Ash Pore Water Analytical Results. xlsx Page 1 of 2 TABLE 7-7 ASH PORE WATER ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Cobalt Cobalt Copper Copper Iron Iron Lead Lead Magnesium Manganese Manganese Mercury Mercury Methane Molybdenum Molybdenum Nickel Nickel Nitrate (as N) Potassium Selenium Selenium Sodium Strontium Strontium Sulfate Sulfide Thallium Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Vanadium Zinc Zinc CIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT CIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units ug/I ug/I mg/I mg/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg-N/L mg/I ug/I ug/I mg/I mg/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I 15A NCAC 02L Standard NE 1* NE 1 NE 300 NE 15 NE NE 50 NE 1 NE NE NE NE 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* Soo NE NE NE 0.3* NE 1 Sample ID Sample Collection Date Analytical Results ABMW-01 06/25/2015 5.55 6.09 0.0106 <0.001 483 1370 <1 <1 51.9 2120 2280 <0.05 <0.05 <10 205 213 4.77 5.45 <0.01 24.6 <1 <1 18.7 3.36 3.49 5.8 <1 2.13 2.47 540 2.8 6 290 314 0.014 <0.005 ABMW-02 06/17/2015 <1 <1 <0.001 <0.001 172 356 <1 <1 27 957 1110 <0.05 <0.05 3100 1620 1830 <1 1.12 0.103 15.2 <1 <1 13.4 1.54 1.78 36 <0.1 <0.2 <0.2 450 11 <5 2.59 3.53 <0.005 <0.005 ABMW-03 06/17/2015 <1 <1 <0.001 <0.001 3870 3890 <1 <1 11.9 451 451 <0.05 <0.05 4400 75.1 75.6 3.16 2.69 0.016 10.2 <1 <1 10.8 1.17 1.17 42 <0.2 <0.2 0.289 350 4.1 9 <0.3 0.68 <0.005 <0.005 ABMW-04 06/22/2015 1.43 1.49 <0.001 <0.001 724 940 <1 <1 32.8 657 641 <0.05 <0.05 4600 434 428 1.12 1.71 <0.01 22.1 <1 <1 12.5 2.3 2.25 38 <0.2 <0.2 <0.2 520 2.9 <5 2.44 2.84 0.013 <0.005 Prepared by: BER/LAM Checked by: KLS Notes: Rechecked by: EMB 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1 mg- N/L = miligram Nitrogen per liter ug/I = microgram per liter Spec Cord = Specific Conductance S.U. = Standard Unit ft = feet NE = Not established DO = Dissolved Oxygen Temp = Temperature DIS = Dissolved ORP = Oxidation Reduction Potential mg/I = miligram per liter TOT = Total Deg C = Degrees Celsius my = milivolts NTU = nephelometric turbicity unit umhos/cm = micro mhos per centimeter = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. < = concentration not detected at or above the detection limit P:\Duke Energy Progres5.1026\105. Mayo Ash Basin GW Assessment Plan\l. 11 CSA Reporting\Tables\Report Tables\Table 7-7 Ash Pore Water Analytical Results. xlsx Page 2 of 2 TABLE 7-8 15A NCAC 2L EXCEEDANCES IN ASH PORE WATER MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter pH Antimony Arsenic Barium Boron Cobalt Iron Manganese Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 1* 10 700 700 1* 300 50 0.2* 500 0.3* Sample ID Sample Collection Date Analytical Results ABMW-01 06/11/2015 9.1 BE BE BE BE BE BE BE BE BE BE ABMW-01 06/25/2015 BE 38 518 925 4560 6.09 1370 2280 2.47 540 314 ABMW-02 06/17/2015 BE BE 1020 BE 9200 BE 356 1110 BE BE 3.53 ABMW-03 06/17/2015 BE BE 193 BE 1940 BE 3890 451 0.289 BE 0.68 ABMW-04 06/22/2015 BE BE 499 BE 4930 1 1.49 940 1 641 1 BE 520 2.84 Prepared by: BER/SRW Checked by: JAW Notes: Rechecked by: EMB - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ug/I = microgram per liter mg/I = milligram per liter S.U. = Standard Unit BE = indicates concentration was below the 15A NCAC 02B Standard, May 1, 2007 * — Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 7-8 2L Exceedances in Ash Pore Water.xlsx Page 1 of 1 TABLE 7-9 VALENCE SPECIATION OF ASH PORE WATER MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Cr(VI) Fe(II) Fe(III) Mn(II) Mn(IV) Reporting Units ug/I ug/I ug/I ug/I ug/I Sample ID Sample Collection Date Analytical Results ABMW-02 06/23/2015 0.017 250 <5 1310 20.00 ABMW-03 06/23/2015 <0.005 10100 <1000 676 60.90 ABMW-04 06/22/2015 <0.005 897 8.1 676 <0.18 Notes• ug/I = microgram per liter < = concentration not detected at or above the reporting limit Prepared by: KDF/LAM Checked by: RKD Rechecked by: EMB P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 7-9 Valence Speciation of Ash Pore Water.xlsx Page 1 of 1 TABLE 8-1 PHYSICAL PROPERTIES OF SOIL MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Sample ID Depth (Feet BGS) Moisture C (/) Gravel (%) Sand (%) Silt (%) Clay (%) Specific Gravity From To ABMW-02BR 56 57 9.1 1.0 31.6 52.4 15.0 2.704 SB-1 7 8 16.7 0.0 35.7 43.9 20.4 2.675 SB-1 14.5 18.5 14.6 0.3 53.7 29.5 16.5 2.645 SB-3 18.5 19.5 25.5 1.8 25.3 32.9 40.0 2.625 SB-4 4 5 12.9 2.1 59.2 29.1 9.6 2.675 SB-5 6.5 7.5 8.5 1.7 74.8 20.3 3.2 2.675 SB-5 12.4 13.4 8.7 1.5 70.8 24.5 3.2 2.685 SB-7 4.5 7.5 11.7 30.1 54.4 8.8 6.7 2.695 MW-08BR 19 122 110.6 3.0 57.9 33.8 1 5.3 2.735 MW-13BR 17 1 27 1 5.7 2.1 67.2 24.9 1 5.8 2.722 Prepared by: EMB Checked by: KDF Notes: = Percent BGS= below ground surface P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 8-1 Physical Properties of Soil.xlsx Page 1 of 1 TABLE 8-2 MINERALOGY OF SOILS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Sample ID Sand % Silt % Clay % Quartz % Feldspar % Amphibole % Chlorite % Dolomite % I (.7)/ S % Illite % Kaolinite % Mullite % ABMW-02BR (57-59) 24.8 52.6 22.6 33.5 15.8 32.8 ND ND 11.5 ND ND 6.3 MW-09BR (44-46) 60.8 29.5 9.7 10.5 30.7 ND 14.6 ND ND 44.2 ND ND MW-11BR (30-32) 92.3 5.1 2.5 19.2 24.8 ND ND 0.1 ND 56.8 ND ND MW-12BR (50-51.5) 54.6 39.2 6.1 22.6 10.0 ND ND ND ND 52.5 14.6 ND MW-13BR (17-27) 72.4 20.4 5.2 8.7 26.1 24.5 6.0 8.5 0.5 25.6 ND ND SB-7 (4.5-7.5) 82.6 9.4 8.0 38.3 24.4 ND ND ND ND 33.5 3.9 ND Prepared by: SRW/DMY Checked by: EMB Notes: % = percent ND = not detected * I (.7)/S represents an approximation of an Interstratified Illite (70%) - Smectite Clay P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 8-2 Mineralogy of Soils.xlsx Page 1 of 1 TABLE 8-3 MINERALOGY OF CORES MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Sand Silt Clay Quartz Feldspar Amphibole Biotite Calcite Chlorite Dolomite Gibbsite Illite Kaolinite Lepidocrocite Mullite Muscovite Siderite Zeolite I(.7)/S Sample ID % % % % % % % % % % % % % % % % % % pct ABMW-02BR (97-100) 89.4 7.1 3.5 14.6 21.1 ND ND ND 5.0 ND ND 26.8 ND ND ND 33.3 ND ND ND ABMW-04BR (105-107) 85.5 11.4 3.1 22.0 28.0 ND 8.3 0.1 ND ND ND ND ND ND ND 41.6 0.1 ND ND MW-05BR (61-63) 83.7 11.2 5.1 17.7 22.7 ND ND 1.1 3.1 0.8 ND 54.3 ND 0.2 ND ND ND ND ND MW-07BR (22-24) 91.5 5.4 3.1 20.7 51.6 ND ND ND ND ND ND 27.6 ND ND ND ND ND ND ND MW-10BR (51.5-53.5) 78.7 17.3 3.9 19.1 34.8 ND ND ND ND ND ND 45.9 ND 0.2 ND ND ND ND ND MW-11BR (43-44) 64.2 30.4 5.4 7.5 39.4 24.4 ND ND 5.2 5.1 1.3 16.8 ND ND ND ND ND ND ND MW-12BR (88.5-90) 70.9 21.1 8.1 21.9 11.5 ND ND ND ND ND ND 65.9 ND ND ND ND ND 0.7 ND MW-13BR (52-54) 83.5 11.0 5.5 15.6 23.6 ND ND ND ND ND ND 60.5 0.5 ND ND ND ND ND ND MW-14BR (40-41.5) 84.4 12.1 3.5 22.1 29.6 ND ND 1.0 2.0 ND ND 45.1 ND 0.1 ND ND ND ND ND MW-15BR (58-63) 94.3 2.3 3.4 22.2 43.4 ND 12.0 ND ND ND ND ND ND ND ND 23.3 ND ND ND MW-16 (54-55) 91.6 4.8 3.7 8.9 37.0 ND ND 1.0 2.9 ND ND 25.2 ND ND ND 25.1 ND ND ND Prepared by: DMY Checked by: KDF Notes: % = percent ND = not detected * I (.7)/S represents an approximation of an Interstratified Illite (70%) - Smectite Clay P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 8-3 Mineralogy of Cores.xlsx 1 of 1 TABLE 8-4 WHOLE ROCK ELEMENTAL ANALYSIS OF CORE MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC As Cd Ce Co Cu Ga La Mo Ni Pb Sb Se Sn W Zn Zr Sample ID ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ABMW-02BR (97-100) 2 <0.2 66 12 67 17 30 2 5 11 2 1 42 1 42 15 ABMW-04BR (105-107) 2 0.5 58 6 4 15 26 1 4 14 2 2 35 <1 201 18 MW-05BR (61-63) <1 <0.2 14 10 102 14 7 1 4 8 1 1 <1 1 52 17 MW-07BR (22-24) 101 <0.2 113 5 9 15 41 4 14 7 <1 1 1 <1 48 33 MW-lOBR (51.5-53.5) <1 <0.2 6 4 3 12 3 <1 2 9 <1 <1 9 <1 34 23 MW-11BR (43-44) 3 0.2 45 52 366 11 13 6 69 6 5 1 1 <1 120 15 MW-12BR (88.5-90) 96 0.4 56 34 22 13 15 6 153 11 <1 <1 1 <1 328 54 MW-13BR (52-54) 2 <0.2 53 12 50 13 25 2 20 8 <1 2 1 <1 52 16 MW-14BR (40-41.5) <1 <0.2 14 8 75 12 7 3 6 7 <1 <1 <1 <1 17 20 MW-15BR (58-63) 5 <0.2 94 9 13 12 28 1 7 12 <1 <1 <1 <1 35 17 MW-16 (54-55) 2 <0.2 88 13 25 12 27 4 29 12 1 <1 <1 <1 71 18 Prepared by: DMY Checked by: KDF Notes: ppm = parts per million < = concentration not detected at or above the reporting limit. 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Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 8-4 Whole Rock Elemental Analysis of Core.xlsx 1 of 1 TABLE 8-5 WHOLE ROCK METAL OXIDE ANALYSIS OF CORE MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Sample ID AIz03 BaO CaO Cr203 Fe203 K20 Mg0 MnO Na20 P201 S'02 SrO Ti02 V201 LOI ABMW-02BR (97-100) 17.75 0.07 2.81 0.05 4.64 1.72 1.31 0.06 1.67 0.10 70.82 0.07 0.40 <0.01 1.51 ABMW-04BR (105-107) 17.12 0.07 2.77 0.03 4.24 1.87 0.98 0.13 1.64 0.08 68.39 0.07 0.34 <0.01 1.71 MW-05BR (61-63) 14.34 0.09 3.04 0.02 3.32 1.52 0.68 0.09 1.41 0.14 39.12 0.04 0.31 <0.01 2.21 MW-07BR (22-24) 15.92 0.10 1.92 <0.01 2.45 2.27 0.57 0.10 2.19 0.13 75.28 0.05 0.42 <0.01 0.95 MW-10BR (51.5-53.5) 13.30 0.08 1.07 0.02 2.81 1.52 0.18 0.06 1.53 0.09 37.39 0.01 0.27 <0.01 0.99 MW-11BR (43-44) 13.98 0.04 11.43 <0.01 15.24 0.82 6.79 0.15 1.06 0.24 47.26 0.08 1.05 0.10 1.68 MW-12BR (88.5-90) 12.74 0.10 0.79 0.06 9.54 2.58 4.89 0.27 0.57 0.08 63.23 0.02 0.63 0.04 3.88 MW-13BR (52-54) 13.37 0.14 1.44 <0.01 5.34 1.44 1.13 0.11 1.50 0.21 67.54 0.03 1.10 0.01 1.87 MW-14BR (40-41.5) 13.91 0.08 3.18 0.03 3.19 1.52 0.70 0.05 1.46 0.14 37.39 0.04 0.33 <0.01 1.52 MW-15BR (58-63) 19.03 j 0.08 3.64 j <0.01 j 5.05 1.51 j 1.23 0.07 j 1.64 0.12 j 67.68 j 0.08 0.42 <0.01 0.80 MW-16 (54-55) 17.45 0.05 3.89 <0.01 5.97 1.45 2.04 0.11 1.69 0.22 60.19 0.05 0.50 <0.01 2.36 Prepared by: DMY Checked by: KDF Notes: %= percent < = concentration not detected at or above the reporting limit P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Repo rting\Tables\Report Tables\Table 8-5 Whole Rock Metal Oxide Analysis of Core.xlsx 1 of 1 TABLE 8-6 CHEMICAL PROPERTIES OF SOIL MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Percent PH at 25 Nitrate Total Analytical Parameter Moisture Degrees C Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel (as N) Potassium Selenium Sodium Strontium Sulfate Thallium Organic Vanadium Zinc c Carbon 0 .q Reporting Units % S.U. mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg 1 W Soil RSL- Industrial Health NE NE 110000 47 3 22000 230 23000 98 NE NE NE 35 4700 82000 Soo NE 2600 4 580 2200 NE NE 580 NE 70000 NE 1.2 NE 580 35000 n E Soil RSL - Residential Health NE NE 7700 3.1 0.68 1500 16 1600 7.1 NE NE NE 2.3 310 5500 400 NE ISO 0.94 39 150 NE NE 39 NE 4700 NE 0.078 NE 39 2300 A m Soil RSL -Protection of Groundwater NE NE NE 0.27 0.29 82 3.2 NE I NE NE NE 180000 NE 46 1 NE 14 NE NE 0.1 NE NE NE NE 0.26 NE I NE NE 0.14 NE NE I NE Sample ID Sample Analytical Results Collection Date 2 AS-03 (41.7-42.5) 03/18/2015 24.7 6.4 13900 <3.5 11.2 83.2 3.1 32.9 <0.42 1080 <332 54.7 17.7 43.4 3020 21.9 541 69.4 <0.011 1.4 22.5 <33.2 1650 <3.5 155 83.7 <332 <3.5 8490 88.1 36.4 Q 3 ABMW-01 (13-13.5) 06/02/2015 19.7 4.9 7090 <6.2 <6.2 53.8 0.23 j <15.5 <0.74 410 <316 3.7 <6.2 4.1 8770 <6.2 1190 92.2 0.011 <3.1 1.4 j <31.6 1350 <6.2 <309 50.8 <316 <6.2 5730 11.9 12.7 a0 ABMW-02BR (45-45.5) 05/31/2015 14.2 7.8 6900 <6 <6 92.2 0.44 <15 <0.72 1640 <289 8 6 j 72.7 18300 3.11 4170 579 <0.0096 <3 4.8 <28.9 329 <6 353 23.2 <289 <6 <699 30.3 39.8 ABMW-02BR (57.5-58) 05/31/2015 4.9 7.4 20200 <5.1 <5.1 41.2 0.26 <12.8 <0.61 7340 <263 56.7 37.4 81.7 43400 <5.1 17600 782 <0.0087 <2.6 53.5 <26.3 360 <5.1 303 49.4 <263 <5.1 <634 84.9 102 O m ABMW-03S (51-53) 05/20/2015 24.6 5.9 10600 <6.8 <6.8 56.1 0.9 <37 <0.81 <170 <338 1.3 j 6.6 j 9 16900 <6.8 4210 319 0.021 <3.4 <1.7 <33.8 2980 <5.1 <340 3.3 j <338 <6.8 <794 28.8 27.7 MW-10BR (0.75-1.0) 02/23/2015 15.2 6.3 7640 <3.1 1.4 81.8 0.4 13.6 j 0.1 j 1210 41.9 12.4 28.9 18600 9.8 5590 527 0.0053 j <0.57 16.3 2660 1.4 93.4 9.4 <1.1 721 35.1 61.3 MW-10BR (13.0-13.75) 02/23/2015 7.5 8.0 18700 <1.1 1.1 479 0.55 26.4 j 0.51 1860 <269 68.3 22.2 18.9 35500 3.5 17000 3200 <0.0086 <5.6 50 <26.9 14300 1.7 416 j 28.4 <269 0.97 j <649 46.2 226 MW-11BR (0-2) 04/14/2015 31.6 5.2 19700 <7.5 <7.5 43.1 <0.38 <18.8 <0.89 1690 <354 22.6 6.4 j 59.1 52900 6.1 j 1590 52.6 0.13 <3.8 1.41 <35.4 <376 <7.5 <376 18.6 <354 <7.5 2950 208 17.2 MW-11BR(30-32) 04/15/2015 2.5 7.4 15000 <5.3 <5.3 179 <0.26 <13.1 <0.63 4700 <257 2.3 40.9 363 44000 <5.3 12200 212 <0.0084 <2.6 16.2 <25.7 5870 <5.3 <263 23.7 <257 <5.3 <614 191 64.7 MW-12D (1-2) 04/26/2015 17.5 4.9 11000 <6 3.6 j 19.6 <0.3 27.4 <0.72 <150 <302 43.6 <6 12.4 31200 6.8 139 j 22.1 0.036 <3 0.83 j <30.2 182 j <6 <299 <3 <302 <6 1110 61 5.2 j y0j MW-12D (25-26) 04/27/2015 16.8 5.9 3530 <6 <6 67.4 <0.3 9.8 j <0.72 <149 <301 3.2 6 22.4 11900 7.2 1190 395 <0.0095 <3 <1.5 <30.1 1520 <6 <299 <3 <301 <6 <721 8.2 15 0 2 7 MW-12D (34-35) 04/27/2015 20.3 5.5 4410 <6.3 <6.3 81.5 0.25 j 9.21 10.75 <156 <313 1.9 9.2 19.1 10700 9.2 1410 855 <0.01 1 <3.1 1.4 j <31.3 1680 <6.3 <313 4.6 1313 <6.3 <753 7.7 27.7 K 17 MW-12D (88.5-90.0) 04/28/2015 11.6 7.3 17400 <5.6 <5.6 179 1.5 <14 0.49 j 2870 <278 141 19.9 11.2 31500 8 15200 2820 <0.0092 3.3 75.3 <27.8 7650 <5.6 <281 24.4 <278 <5.6 356 j 50.1 195 V Q SB-01 (1-2) 03/04/2015 30.6 6.3 7030 <1.4 1.2 j 49.6 0.24 9.6 <0.17 655 <362 15.7 3.7 8.8 12400 9.6 1670 104 0.033 <0.7 2.5 <36.2 881 <1.4 35.4 j 6 <362 <1.4 9060 28.3 14.5 m SS-01 (13.5-14.5) 03/04/2015 21.6 5.5 4960 <1.3 1.2 j 61.5 0.56 <15.9 <0.15 270 <312 <1.6 8.9 20.6 $490 2.9 2440 678 <0.01 <3.2 <1.6 <31.2 1550 1.4 40.7 j 8.3 <312 <1.3 385 j 17.8 13.2 SB-02 (0.5-2) 03/03/2015 35.5 5.3 10200 <1.6 1.9 65.7 0.52 16.3 j 0.13 j 227 <392 12.9 6.4 22.8 18300 7.5 2420 365 0.02 <0.8 1.7 <39.2 2020 1.3 j <79.8 4.3 <392 <1.6 3750 44.8 27.3 SB-02 (11.0-12.5) 03/03/2015 19.2 6.0 5930 <1.2 1.5 31.3 0.39 7.8 <0.15 22.2 j <309 10.8 1.6 5.5 10300 4.8 1070 69.4 <0.0096 0.89 0.91 <30.9 Soo 0.85 j 30.9 j 1.1 <309 <1.2 <747 23.8 14.9 SB-03 (5-6) 03/04/2015 8.5 8.6 5030 <1.1 0.64j 55.2 0.15 5.7 0.094j 1420 1272 20.7 4.9 14 8070 2.4 3810 348 0.0096 1.1 7.7 <27.2 2950 <1.1 104 11 <272 <1.1 <657 15 30.8 SB-03 (17-18.5) 03/04/2015 30.3 4.9 11800 <1.5 1.6 51.4 0.26 12.9 <0.18 208 <360 35.6 5.2 15.5 18100 8.2 4250 120 <0.012 <0.75 10.9 <36 2410 <1.5 40.9 j 4.4 <360 <1.5 3160 38.4 32.4 MW-03BR (0.8-1.25) 02/05/2015 16.8 5.0 7030 <3 <3 57.6 0.341 <3 <0.36 332 <299 11.3 5.4 6.3 8480 3.3 2500 327 0.013 <6 5.1 <29.9 1070 <3 <59.7 5.4 <299 <3 3470 16 25.3 MW-03BR (14.75-15) 02/05/2015 2 8.4 4850 <2.5 <2.5 74.4 0.24 j <25.4 <0.31 1740 <255 1.5 j 4.3 4.8 7750 1.31 3050 468 <0.0081 <5.1 <2.5 <25.5 3780 <2.5 161 9.6 <255 <2.5 <601 7.6 25.4 MW-03BR(17-18) 02/05/2015 10.4 8.6 3230 <2.7 <2.7 74.5 0.161 <2.7 <0.33 1490 <280 <2.7 3.6 5.9 4450 <2.7 2040 459 <0.0091 <5.5 <2.7 <28 2250 <2.7 92.1 10.7 <280 <2.7 <599 4.4 14.1 MW-07SR (1-2) 04/23/2015 2.8 5.6 3080 <5.1 <5.1 21.5 0.29 <12.8 <0.61 68.51 <257 4.1 <5.1 7 7320 5.4 437 27.7 0.0073 j <2.6 0.68 j <25.7 315 <5.1 <255 2 j <257 <5.1 420 j 12.8 7 MW-08BR (0.75-1.25) 02/11/2015 19.5 6.0 14500 <3.2 <3.2 147 0.82 <63.4 <0.38 1120 <309 62.2 21.3 34.7 24700 8.9 10500 1230 <0.0096 <12.7 29.4 <30.9 6590 <3.2 <1270 13.2 <309 <3.2 <599 50.6 88.9 MW-08BR (25.5-26) 02/11/2015 8.4 7.4 23700 <2.7 <2.7 193 0.39 31 j <0.33 3740 <272 419 32.9 45.7 31300 2 j 29900 933 <0.0089 <10.9 157 <27.2 5450 <2.7 173 33.6 <272 <2.7 <597 75.8 59.4 w w MW-08BR (30.5-31) 02/11/2015 6.6 6.9 8330 <2.7 <2.7 130 0.24 j <53.1 <0.32 883 <267 67.1 7.4 19.8 11400 3.4 6370 875 <0.0082 <50.6 24 <26.7 2700 <2.7 68.7 9.9 <267 <2.7 <599 25.2 29 F � MW-136R (0-2) 04/12/2015 26.2 4.9 15500 <6.5 <6.5 72.9 0.33 <16.3 <0.78 38.1 <334 6.1 <6.5 10.9 19600 6.2 j 1840 82.8 0.029 0.42 j 0.53 <33.4 1360 <6.5 <65.1 1.8 <334 <6.5 1210 32.4 25.4 w o. 2 MW-13BR(52-54) 04/13/2015 4.6 8.3 4770 <5.1 <5.1 62.3 0.19 <2.5 <0.61 2300 <266 9.2 6.6 48.4 10400 <5.1 2370 789 <0.0088 0.75 5.8 <26.6 1780 <5.1 133 17.6 <266 <5.1 <629 13.1 26.8 a MW-13BR (52-54) DUP 04/13/2015 15.6 8.4 4630 <5.9 <5.9 61.5 0.19 <2.9 <0.7 2250 <296 8.7 7.2 38.7 10200 <5.9 2730 803 <0.0092 0.74 8.7 <29.6 1570 <5.9 108 18.1 <296 <5.9 <713 13.9 30.8 m 2 MW-15BR (0.5-1) 05/09/2015 19.4 5.2 8440 <6.2 <6.2 64.6 0.241 <15.5 <0.74 451 1305 10.4 3.9 j 12.5 15600 4.7 j 3760 108 0.0056 j <3.1 1.3 j <30.5 1370 16.2 <309 11.2 1305 <6.2 1820 27.1 18.9 Q w MW-166R (1-2) 04/25/2015 24.9 5.1 5360 <6.5 c6.5 95.4 0.4 <16.2 <0.78 253 <333 7.6 6j 4.3 7710 6.31 454 1250 0.012 <3.2 1.9 <33.3 254j <6.5 <324 3.2j <333 <6.5 3350 17.3 10.4 0 m MW-16BR (23-24) 04/26/2015 2.4 7.8 4860 <5 <5 28.2 0.2 j 10 j <0.6 2710 <256 2.1 4.6 j 5.3 10600 <5 3200 885 <0.0083 <2.5 1.21 <25.6 1390 <5 1821 23.3 <256 <5 <616 8.4 35.6 7 O MW-16BR (33-35) 04/25/2015 30.7 8.1 9030 <7.5 <7.5 131 0.36 j 16.8 j <0.9 4470 <359 9.2 12 126 19100 3.8 j 5220 1630 <0.012 2.9 j 2.9 <35.9 2890 <7.5 384 37.5 <359 <7.5 <867 16.3 54.6 J O MW-166R (54.5-55.5) 04/25/2015 6.5 9.6 24500 <5.2 <5.2 237 0.4 32.3 <0.62 19400 <266 37.2 19.6 26.7 38300 <5.2 21800 1010 <0.0089 <2.6 28.1 <26.6 16600 <5.2 261 40 <266 <5.2 <644 87 101 m SB-05 (1-2) 03/04/2015 26.5 6.0 5320 <3.4 1.8 47.1 0.36 <17 0.12 j 313 <346 <1.7 2.8 11.1 8280 5.4 1940 406 <0.011 <3.4 <1.7 <34.6 1730 1.9 <340 4.2 <346 <1.4 502 j 6.8 36.3 SS-05 (2.3-3.3) 03/04/2015 9.3 5.9 3510 <3.1 1.1 40.9 0.35 <13.5 0.091 j 189 <271 <1.4 1.7 3.9 6670 5.5 1660 393 <0.0086 <2.7 <1.4 <27.1 1550 1.2 <271 5.2 <271 <1.1 380 j 5.9 31.6 SB-05 (8-9) 03/04/2015 9.5 6.5 1480 <3.1 1 j 22.2 0.5 <13.7 <0.13 81.4 1272 <1.4 2.2 43.8 5790 11.8 368 195 <0.0093 0.36 j <0.27 <27.2 111 0.87 j 46.7 j 3.1 <272 <1.1 <664 4.8 12.3 SS-06 (1-2) 03/04/2015 20.3 5.9 2510 <1.3 1.2j 54.8 0.17 2.9j <0.15 <32.1 <309 0.14 1 2.5 13.1 3120 4.2 816 192 <0.0093 <0.64 0.55 <30.9 801 0.9 j 67.2 4.1 <309 <1.3 <754 2.7 14.7 SB-07 (1-2) 05/07/2015 13 5.1 9000 <5.8 <5.8 68.8 0.46 <14.5 <0.7 301 <286 11.4 5.9 7.7 9460 1.41 1110 693 0.037 <2.9 4.2 <28.6 534 <5.8 <291 5.7 <286 <5.8 �6101'�7,2621.4 SB-07 (4.5-7.5) 05/07/2015 17.2 6.4 2020 <6 <6 15.5 0.211 <15 <0.72 154 <300 8.2 <6 4.4 6040 <6 387 226 0.011 <3 1.41 <30 266j <6 <300 2.9j<300<6 6.1 Prepared by: BER LAM Checked by: RKD Notes; - Soil RSL - Industrial Health 0 - Soil RSL - Residential Health 0 - Soil RSL - Protection of Groundwater DUP = Duplicate % = percent S.U. = Standard Unit NE = Not established mg/kg = milligram per kilogram < = concentration not detected at or above the reporting limit. j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 8-6 Chemical Properties of Soil.xlsx Page 1 of 1 TABLE 8-7 LEACHING PROPERTIES OF SOIL MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate Potassium Selenium Sodium Strontium Sulfate Thallium Vanadium Zinc (as N) O a+ OReporting Units ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I mg/I ug/I ug/I mg/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I mg/I mg/I ug/I mg/I mg/I mg/I ug/I ug/I mg/I J d p, 15A NCAC 02L Standard NE 1 * 10 700 4 * 700 2 NE 250 10 1 * 1 300 15 NE 50 1 NE 100 10 NE 20 NE NE 250 0.2 * 0.3 * 1 N Sample ID Sample Collection Date Analytical Results Q ABMW-02BR (45-45.5) 05/31/2015 20000 <0.5 6.1 542 1.3 65.9 0.085 5.66 <5.8 15.6 12 0.171 34200 5.6 10.5 1240 <0.2 2.7 12 <0.23 1.52 7.5 5.58 0.101 3.1 0.037 j 69 0.199 3 WABMW-02BR (57.5-58) 05/31/2015 17200 <0.5 0.35 j 291 0.27 49.7 0.059 j 5.84 <5.3 58.9 39.4 0.066 40200 0.97 12.9 912 <0.2 1.2 48.6 <0.21 0.59 <0.5 4.13 0.053 2.4 <0.1 114 0.176 m J N � ABMW-035 (51-53) 05/20/2015 268 <0.5 0.17 j 80.2 <0.2 85.6 <0.08 0.17 <6.6 0.55 0.15 j 0.00054 j 95.1 0.072 j 0.0408 4.8 <0.2 <0.5 0.18 j <0.27 0.102 <0.5 1.87 0.0032 3 <0.1 0.61 j 0.0567 MW-10BR(13.0-13.75) 02/23/2015 16400 <0.5 2.9 312 0.68 39.9 0.27 3.08 2.9j 38.9 14.9 0.0246 28600 3.8 5.9 2170 <0.2 1.5 20.8 0.41 3.83 1.1 7.05 0.0444 3.5 0.17 49.9 0.107 J MW-116R (30-32) 04/15/2015 13100 <0.5 1.5 350 0.18 j 52.2 0.14 4.6 <5.1 4 26.5 0.617 49600 1 7.32 231 <0.2 4.4 14.2 <0.21 2.59 <0.5 2.18 0.0294 3 0.046 j 213 0.179 O W c Z MW-12D (25-26) 04/27/2015 3.2 j <0.5 <0.5 55.5 <0.2 38 <0.08 0.123 <6 0.23 j 0.19 j 0.00074 j <50 0.053 j 0.137 3.3 <0.2 <0.5 0.34 j 0.25 0.0965 <0.5 1.25 0.0022 3.1 <0.1 <1 0.0253 7 O W t7 MW-12D (34-35) 04/27/2015 5.7 j <0.5 <0.5 64.1 <0.2 47.3 <0.08 0.148 <6.3 0.47 j <0.5 0.001 <50 0.088 j 0.1 2.7 <0.2 <0.5 0.37 j <0.25 0.151 <0.5 1.33 0.0035 3.4 <0.1 <1 0.0236 Y v m SB-01 (13.5-14.5) 03/04/2015 3030 <0.5 <0.5 38.8 0.3 18.1 <0.08 0.407 <6.4 1.1 2.5 0.0044 3140 0.69 0.175 313 <0.6 <0.5 0.57 0.38 0.414 <0.5 2.3 0.0121 3 <0.1 7 <0.005 SB-03 (17-18.5) 03/04/2015 132000 <2.5 12.3 377 2.6 75.8 <0.4 2.17 26.1 269 24.3 0.112 109000 62.1 6.5 250 <0.6 2.7 48.6 <0.29 5.2 <2.5 4.56 0.0382 4 0.6 277 0.132 MW-03BR (2.0-2.25) 02/05/201S 8440 <0.5 0.67 96.5 0.42 7.8 <0.08 1.16 <5 7.2 1.7 0.005 6500 3.2 1.58 72.8 <1.2 <0.5 3.2 0.27 0.738 <0.5 3.22 0.0187 2.6 <0.1 11.6 0.0231 FMW-08BR (25.5-26) 02/11/2015 53900 <0.5 0.82 702 0.78 <5 0.24 12.8 <5.5 858 83.7 0.161 93400 5.7 58.2 3410 <1.2 <0.5 311 0.29 6.36 <0.5 3.74 0.169 2.8 0.28 166 0.118 Lij m ce MW-13BR (0-2) 04/12/2015 9.4 j <0.5 <0.5 93.6 <0.2 42.2 <0.08 0.354 <6.8 0.38 j 0.2 j 0.00044 j <50 0. 047 j 0.547 3 <0.2 <0.5 <0.5 0.35 0.117 <0.5 1.2 0.006 6.1 <0.1 <1 0.0488 N MW-16BR (23-24) 04/26/2015 4500 <0.5 0.19 j 126 0.18 j 30.2 <0.08 1.14 <5.1 1.4 2.5 0.0038 5980 1 1.67 701 <0.2 0.96 0.92 <0.2 1.65 <0.5 3.74 0.0238 3.8 <0.1 7.2 0.0387 Q m = MW-16BR (33-35) 04/25/2015 13200 <0.5 2.8 360 0.48 32.7 0.062 j 3.37 <7.2 8.8 12.7 0.155 21000 5.6 4.96 1990 <0.2 10.9 4.2 <0.29 3.8 2.1 3.9 0.047 5.4 0.045 j 18.5 0.0909 Q u O SB-05 (2.3-3.3) 03/04/2015 3590 <0.5 0.76 34.5 0.27 9.9 <0.08 0.966 <5.5 1.7 <0.5 0.0017 1270 1.1 0.306 64.8 <0.2 <0.5 0.91 0.34 0.931 <0.5 2.92 0.0136 3.1 <0.1 1.9 0.0054 F SB-05 (8-9) 03/04/2015 195 <0.5 <0.5 1.7 <0.2 72 <0.08 0.202 <5.5 0.9 <0.5 <0.001 73 <0.1 0.215 3.2 <0.2 <0.5 <0.5 0.32 0.696 <0.5 5.62 0.0014 4.1 <0.1 <1 <0.005 O J 0 W SB-07 (1-2) 05/07/2015 133 <0.5 <0.5 126 <0.2 77.5 <0.08 0.87 <5.7 0.37 j <0.5 0.00085 j 61.7 0.054 j 0.27 9.3 <0.2 <0.5 0.35 j 0.31 0.318 <0.5 1.41 0.0168 5.2 <0.1 <1 0.0606 SB-07 (4.5-7.5) 05/07/2015 18200 <0.5 2 252 0.66 63.7 0.028 j 1.89 <6 19.9 4.5 0.0153 17300 5.7 1.92 491 <0.2 1.1 9.5 0.29 1.82 0.24 j 2.27 0.0342 5.7 0.12 32 0.0923 Prepared by. BER LAM Checked by: RKD Notes: = Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. mg/I = milligrams per liter ug/I - microgram per liter NE - Not established j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. Synthetic Precipitation Leaching Procedure, USEPA Method 1312 P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 8-7 Leaching Properties of Soil.xlsx Page 1 of 1 TABLE 8-8 WHOLE ROCK METAL OXIDE ANALYSIS OF SOILS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Sample ID A120,3 % BaO % CaO % Cr203 % Fe203 % K20 % Mg0 % MnO % Na20 % P201 % S'02 % SrO % Ti02 % V201 % LOI % ABMW-02BR (57-59) 16.52 0.01 8.18 0.02 13.42 0.71 5.15 0.16 0.73 0.17 49.70 0.06 1.11 0.05 4.04 MW-09BR (44-46) 15.33 0.05 2.31 0.05 12.40 1.62 8.39 0.23 1.09 0.18 52.28 0.02 0.75 0.04 4.95 MW-11BR (30-32) 12.82 0.07 1.73 <0.01 3.22 1.36 0.72 0.04 1.55 0.13 70.89 0.03 0.34 <0.01 1.24 MW-12BR (50-50.1) 16.31 0.13 0.29 <0.01 3.53 1.69 1.02 0.06 0.44 0.12 71.35 0.02 0.54 <0.01 4.49 MW-13BR (17-27) 13.48 0.04 9.74 <0.01 15.01 1.19 5.23 0.14 0.95 0.22 51.02 0.08 1.14 0.11 2.67 SB-7 (4.7-7.5) IL 10.69 0.05 1.03 <0.01 3.50 1.03 0.45 0.11 1.31 0.03 78.53 0.03 0.20 <0.01 1.09 Prepared by: DMY Checked by: EMB Notes• %= percent < = concentration not detected at or above the reporting limit P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 8-8 Whole Rock Metal Oxide Analysis of Soils.xlsx Page 1 of 1 TABLE 8-9 WHOLE ROCK ELEMENTAL ANALYSIS OF SOIL MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC As Cd Ce Co Cu Ga La Mo Ni Pb Sb Se Sn W Zn Zr Sample ID ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ABMW-02BR(57-59) 2 0.3 23 40 86 13 5 <1 44 13 3 <1 32 <1 101 5 MW-09BR(44-46) 2 0.5 28 69 48 14 12 3 597 10 2 <1 <1 <1 369 17 MW-11BR (30-32) <1 <0.2 38 7 18 12 18 1 6 7 3 <1 <1 <1 39 12 MW-12BR (50-51.5) 95 <0.2 79 6 64 15 50 6 18 13 1 <1 4 <1 79 159 MW-13BR (17-27) 4 0 42 64 477 13 12 3 39 7 2 <1 <1 <1 125 11 SB-7 (4.5-7.5) JI4 <0.2 67 6 10 8 15 2 9 15 <1 <1 <1 1 26 12 Prepared by: DMY Checked by: EMB Notes: ppm = parts per million < = concentration not detected at or above the reporting limit. P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 8-9 Whole Rock Elemental Analysis of Soil.xlsx Page 1 of 1 TABLE 9-1 SEDIMENT ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Percent Moisture pH at 25 Degrees C Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Thallium Total Organic Carbon Vanadium Zinc Reporting Units % S.U. mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg Soil RSL- Industrial Health NE NE 110000 47 3 22000 230 23000 98 NE NE NE 35 4700 82000 800 NE 2600 4 580 2200 NE NE 580 NE 70000 NE 1.2 NE 580 35000 Soil RSL- Residential Health NE NE 7700 3.1 0.68 1500 16 1600 7.1 NE NE NE 2.3 310 5500 400 NE ISO 0.94 39 ISO NE NE 39 NE 4700 NE 0.078 NE 39 2300 Soil RSL - Protection of Groundwater NE NE NE 0.27 0.29 82 3.2 NE NE NE NE 180000 NE 46 NE 1 14 NE NE 0.1 NE NE NE NE 0.26 NE NE NE 0.14 NE NE NE Sample ID Sample Collection Date Analytical Results S-01 05/12/2015 65.5 6.4 1120 <14.4 56.4 271 <0.72 40.4 <1.7 1580 <706 5.8 <14.4 <3.6 247000 <14.4 664 511 <0.024 <7.2 <14.4 <70.6 <718 <14.4 <718 40.1 <706 <14.4 18400 <14.4 227 S-02 05/13/2015 26.9 6.5 3390 <6.8 <6.8 49.1 0.25j <17 <0.82 513 <341 8 16.4 7.8 16000 <6.8 1580 1060 <0.011 <3.4 3.2 <34.1 687 <6.8 <340 6.8 <341 <6.8 1130 13.3 18.7 S-02B 05/13/2015 18.9 6.6 2170 <6.3 <6.3 31.8 0.21 j <15.8 <0.76 507 <312 3.4 4.7 j 4.8 12700 <6.3 1110 427 <0.0097 <3.2 0.96 j <31.2 471 <6.3 <316 5.3 <312 <6.3 1030 5.8 j 10.7 S-03 05/12/2015 19.5 7.1 5030 <6.5 <6.5 38.3 0.44 <16.2 <0.78 625 <315 94.4 7.4 5.4 15600 14 1140 562 <0.0099 <3.2 2.8 <31.5 342 <6.5 <325 10 <315 <6.5 1290 42.5 12.6 S-04 05/13/2015 57 6.9 6190 <12 14.1 164 0.33j 16.9j <1.4 2100 <585 15.4 14 12.3 101000 <12 3250 2400 <0.018 <6 3.2 <58.5 1390 <12 <601 33.6 <585 <12 12900 22.3 26.6 S-06 05/13/2015 52.7 6.6 7500 <9.9 <9.9 80.9 0.37 j <24.7 <1.2 2010 <517 18.5 7.4 j 15.9 17400 8 j 3090 436 0.0096 j <4.9 7.4 <51.7 1230 <9.9 <495 15.5 <517 <9.9 23500 33.6 174 S-08 05/13/2015 43.5 6.8 2900 <8.7 <8.7 179 0.7 <21.8 <1 1280 <435 4.5 40.6 4.9 10700 4.9 j 656 7090 0.01 j <4.4 4.8 <43.5 310 j <8.7 <436 29.2 <435 <8.7 3510 7.3 j 12.8 SW -CBI 05/13/2015 30.2 6.3 6760 <7.1 <7.1 53.1 0.38 <17.8 <0.85 763 <349 13.1 4.5 j 10.4 9660 3.6 j 3070 186 0.0065 j <3.6 5.2 <34.9 1590 <7.1 <356 10.3 <349 <7.1 3770 16.5 39.6 SW-CB2 05/13/2015 56.5 7.0 7350 <11.1 <11.1 98.2 0.29 j <27.7 <1.3 1060 <566 13.9 6.1 j 9.5 11400 7.4 j 2170 383 0.027 <5.5 5 <56.6 952 <11.1 <553 16.3 399 j <11.1 24800 19.2 31.4 SW-REF1 05/13/2015 26.2 6.4 2610 <7.1 <7.1 23.7 0.18 j <17.8 <0.85 335 <333 17.3 <7.1 3.3 7100 3.7 j 937 122 <0.01 <3.6 2.4 <33.3 470 <7.1 <356 3.2 j <333 <7.1 5210 15.1 14.8 Prepared by: BER LAM Checked by: KLS Notes: Bold highlighted concentration indicates highest exceedance of the EPA Mid -Atlantic Risk Assessment regional screening levels for soil, June 2015, for the category listed below: - Soil RSL - Industrial Health - Soil RSL - Residential Health - Protection of Groundwater % = percent S.U. = Standard unit mg/kg = milligram per kilogram NE = Not established < = concentration not detected at or above the reporting limit j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 9-1 Sediment Analytical Results Page 1 of 1 TABLE 9-2 SEEP ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Redox Assignment PH Temp Spec Coed DO ORP Eh Turbidity Alkalinity Aluminum Aluminum Antimony Antimony Arsenic Arsenic Barium Barium Beryllium Beryllium Bt carbonate Alkalinity Boron Boron Cadmium Cadmium Calcium Carbonate Alkalinity Chloride Chromium Chromium Cobalt Cobalt DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT Reporting Units None S.U. Deg C umhos mg/I mV mV NTU mg/l ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/l ug/I ug/I ug/I ug/I mg/I mg/l mg/I ug/I ug/I ug/I ug/I 15A NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE 1* NE 10 NE 700 NE 4* NE NE 700 NE 2 NE NE 250 NE 10 NE 1* ISA NCAC 02B Standard NE 6-9 NE I NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 6.5 NE NE NE NE 0.15 NE NE NE 230 24 NE NE NE Sample ID Sample Collection Date Field Parameters Analytical Results S-01 05/12/2015 Anoxic 6.2 16 381 0.17 -22 183 69.7 68 20 198 <1 <1 2.06 3.45 131 142 <1 <1 68 1560 1560 <1 <1 21.5 <10 54 <1 <1 7.88 8.05 5-02 05/12/2015 Mixed(oxic-anoxic) 5.9 16 419 4.71 174 379 1.47 39 6 12 <1 <1 <1 <1 125 130 <1 <1 39 1640 1650 <1 <1 29.8 <10 73 <1 <1 10.2 9.09 S-02B 05/13/2015 Mixed (oxic-anoxic) 6.0 15 443 4.49 95 300 14.8 36 7 36 <1 <1 <1 <1 130 135 <1 <1 36 1640 1640 <1 <1 30 <10 79 <1 <1 10.9 10.1 S-02B DUP 05/13/2015 Mixed (oxic-anoxic) 6.0 15 443 4.49 95 300 14.8 36 6 24 <1 <1 <1 <1 130 133 <1 <1 36 1630 1630 <1 <1 30 <10 79 <1 <1 10.8 10.1 S-03 05/12/2015 Mixed (oxic-anoxic) 6.4 19 346 8.44 194 399 2.43 46 7 60 <1 <1 <1 <1 61 64 <1 <1 46 1240 1250 <1 <1 26.2 <10 58 <1 <1 1.82 1.75 5-04 05/13/2015 Mixed(oxic-anoxic) 6.3 16 397 4.86 55 260 101 58 10 34 <1 <1 <1 1.4 136 148 <1 <1 58 1300 1340 <1 <1 21.2 <10 49 <1 <1 8.75 8.23 S-05 05/12/2015 Oxic 7.9 27 443 2.48 218 423 4.38 28 18 109 <1 <1 2.47 2.72 63 68 <1 <1 28 1740 1790 <1 <1 38.1 <10 71 <1 <1 <1 <1 S-06 05/13/2015 Mixed (oxic-anoxic) 6.9 20 177 2.63 95 300 45.2 59 73 1140 <1 <1 <1 <1 32 42 <1 <1 59 <50 <50 <1 <1 13.7 <10 9.6 <1 <1 <1 5-08 OS/13/2015 Mixed (oxic-anoxic) 6.3 16 479 7.17 154 359 66.8 13 16 2730 <1 <1 <1 <1 101 198 <1 <1 13 1880 1860 <1 <1 35.5 <10 94 <1 2.81 1.18 M Prepared by: BE LAM Checked by: KLS Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ® - Bold highlighted concentration indicates exceedance of the 15A NCAC 02B Standard, April 22, 2015. S.U. = Standard Unit NE = Not established NTU = nephelometric turbidity unit ug/I = microgram per liter umhos/cm = micro mhos per centimeter DIS = Dissolved DO = Dissolved Oxygen Temp = Temperature Deg C = Degrees Celsius mg/I = milligram per liter my = millivolts DUP = Duplicate mg - N/L = milligram nitrogen per liter TOT = Total ORP = Oxidation Reduction Potential < = concentration not detected at or above the reporting limit. = Interim Maximum Allowabl Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. PADuke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\ReportTables\Table 9-2 Seep Analytical Results Page 1 of 2 TABLE 9-2 SEEP ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Copper Copper Iron Iron Lead Lead Magnesium Manganese Manganese Mercury Methane Molybdenum Molybdenum Nickel Nickel Nitrate (as N) Potassium Selenium Selenium Sodium Strontium Strontium Sulfate Sulfide Thallium Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Vanadium Zinc Zinc DIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units mg/I mg/I ug/I ug/l ug/l ug/l mg/l ug/I ug/l ug/l ug/l ug/I ug/I ug/l ug/l mg-N/L mg/l ug/l ug/l mg/I mg/1 mg/l mg/I mg/I ug/l ug/l mg/I mg/I mg/I ug/I ug/I mg/I mg/I SSA NCAC 02L Standard NE 1 NE 300 NE is NE NE 50 1 NE NE NE NE 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* 500 NE NE NE 0.3* NE 1 iSA NCAC 02B Standard 0.0027 NE NE I NE 0.54 NE NE NE NE 0.012 NE NE NE 16 25 10 1 NE 1 NE 5 NE NE NE 250 NE NE NE 500 NE NE NE NE 0.036 NE Sample ID Sample Collection Date Analytical Results S-01 05/12/2015 <0.001 <0.001 15100 22000 <1 <1 8.16 3360 3370 <0.0005 89 <1 <1 <1 1.21 0.018 1.63 <1 <1 35.7 0.34 0.346 39 <0.1 <0.2 <0.2 260 1.5 95 <0.3 0.45 0.006 0.016 S-02 05/12/2015 <0.001 <0.001 3000 3100 <1 <1 13.3 3400 3320 0.00118 12 <1 <1 1.76 1.98 0.042 2.52 <1 <1 20.8 0.557 0.558 33 <0.1 <0.2 <0.2 330 1.3 <5 <0.3 <0.3 0.012 0.011 S-02B 05/13/2015 SfAW62'l <0.001 3200 3590 <1 <1 13.6 3250 3280 0.00145 15 <1 <1 1.77 2.04 0.033 2.53 <1 <1 21 0.552 0.563 36 <0.1 <0.2 <0.2 280 1.2 6 <0.3 <0.3 0.013 0.01 S-02B DUP 05/13/2015 <0.001 <0.001 3150 3330 <1 <1 13.5 3250 3280 0.000685 15 <1 <1 1.82 1.68 0.035 2.53 <1 <1 21 0.552 0.559 35 <0.1 <0.2 <0.2 330 1.3 5 <0.3 <0.3 0.01 0.01 S-03 05/12/2015 <0.001 <0.001 213 381 <1 <1 10.2 1140 1170 0.00394 10 <1 <1 <1 <1 0.039 2.12 <1 <1 24 0.438 0.446 29 <0.5 <0.2 <0.2 240 2 9 <0.3 <0.3 0.007 <0.005 S-04 05/13/2015 <0.001 I <0.001 7450 11400 <1 I <1 7.95 3520 3620 1 <0.0005 1 38 <1 <1 <1 1.1 <0.01 1.65 <1 <1 34.6 0.301 0.313 35 <0.1 <0.2 <0.2 240 1.4 28 <0.3 <0.3 <0.005 0.007 S-05 05/12/2015 0.00169 1 0.0019 23 1 112 1 <1 I <1 1 13.9 1 17 1 79 1 0.000896 <10 12.7 1 11.8 <1 <1 0.081 5.46 <1 <1 11.2 0.24 0.248 46 <0.1 <0.2 <0.2 320 6.1 9 1.37 1.43 <0.005 <0.005 S-06 05/13/2015 0.00102 0.0012 422 3170 <1 <1 4.99 616 670 0,004 140 <1 <1 <1 <1 0.121 1.85 <1 <1 13 0.099 0.103 4.4 <0.5 <0.2 <0.2 140 4.2 65 0.588 2.75 0.016 0.009 S_l 05/13/2015 <0.001 0.0042 64 6190 <1 2.95 17.5 657 2790 0.008 <10 <1 <1 <1 4.25 0.095 3.31 <1 <1 21 0.661 0.691 53 <0.5 <0.2 <0.2 410 2.7 420 <0.3 5.19 <0.005 0.024 Prepared by: BE LAM Checked by: KLS Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02B Standard, April, 22,2015. S.U. = Standard Unit NE = Not established NTU = nephelometric turbidity unit ug/I = microgram per liter umhos/cm = micro mhos per centimeter DIS = Dissolved DO = Dissolved Oxygen Temp = Temperature Deg C = Degrees Celsius mg/I = milligram per liter my = millivolts DUP = Duplicate mg - N/L = milligram nitrogen per liter TOT = Total ORP = Oxidation Reduction Potential < = concentration not detected at or above the reporting limit. = Interim Maximum Allowabl Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. PADuke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\ReportTables\Table 9-2 Seep Analytical Results Page 2 of 2 TABLE 9-3 SURFACE WATER ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Spec Aluminum Aluminum Antimony Antimony Arsenic Arsenic Barium Barium Beryllium Beryllium Bi- Boron Boron Cadmium Cadmium Calcium Carbonate Chromium Chromium Cobalt Cobalt Copper Copper Analytical Parameter Redox Assignment PH Temp Coed DO ORP Eh Turbidity Alkalinity carbonate Alkalinity Chloride Alkalinity DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT Reporting Units Unknown S.U. Deg C u/cirois mg/I mV mV NTU mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I ug/I ug/I mg/I mg/I 15A NCAC 02B Standard NE 6-9 NE NE NE NE NE NE NE NE NE NE NE NE 10 NE NE 6.5 NE NE NE NE 0.15 NE NE NE 230 24 NE NE NE 0.0027 NE Sample ID Sample Field Parameters Analytical Results Collection Date SW-CB1 05/13/2015 Mixed (oxic-anoxic) 6.2 15 329 4.2 162 366.6 14.8 47 9 965 <1 <1 <1 <1 85 101 <1 <1 47 1140 1150 <1 <1 25.5 <10 58 <3 1.25 3.05 4.2 <0.001 0.00165 SW-CB2 05/13/2015 Mixed (oxic-anoxic) 6.6 22 276 0.68 -62 143.1 27.4 63 38 148 <1 <1 <1 1.06 84 89 <1 <1 63 448 455 <1 <1 16.9 <10 26 <1 <1 2.71 2.73 <0.001 <0.001 SW -REFS 05/13/2015 Mixed (oxic-anoxic) 6.7 18 117 2.58 119 323.5 16 41 23 111 <1 <1 <1 <1 31 34 <1 <1 41 <50 <50 <S <1 8.24 <10 6 <S <1 <S <S 0.00117 <0.001 Prepared by: BER/MAH Checked by: RKD Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02B Standard, April 22, 2015. Deg C = Degree Celsius Spec Cord = Specific Conductance my = millivolts DO = Dissolved Oxygen mg/I = milligram per liter S.U. = standard unit TOT = Total ORP = Oxidation Reduction Potential DIS = Dissolved umhos/cm = micro mhos per centimeter NE = Not established Temp = Temperature NTU = nephelometric turbidity unit < = concentration not detected at or above the reporting limit P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\l.11 CSA Reporting\Tables\Report Tables\Table 9-3 Surface Water Analytical Results Page 1 of 2 TABLE 9-3 SURFACE WATER ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Iron Iron Lead Lead Magnesium Manganese Manganese Mercury Methane Molybdenum Molybdenum Nickel Nickel Nitrate (as N) potassium Selenium Selenium Sodium Strontium Strontium Sulfate Sulfide Thallium Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Vanadium Zinc Zinc DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units ug/l ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg-N/L mg/I ug/I ug/I mg/I mg/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I SSA NCAC 02B Standard NE NE 0.54 NE NE NE NE 0.012 NE NE NE 16 25 10 NE NE 5 NE NE NE 250 NE NE NE 500 NE NE NE NE 0.036 NE Sample ID Sample Collection Date Analytical Results SW-CB1 05/13/2015 1600 4320 <1 <1 9.98 2100 2350 0.00595 120 <1 <1 <1 1.52 0.625 2.09 <1 <1 23.1 0.411 0.425 30 <1 <0.2 <0.2 220 2.8 49 <0.3 1.83 0.012 0.013 SW-CB2 05/13/2015 2130 4160 <1 <1 6.57 8240 8330 0.0033 250 <1 <1 <1 <1 0.052 2.25 <1 <1 13.7 0.213 0.217 5 <0.1 1 <0.2 <0.2 170 7.8 30 0.397 0.811 0.008 <0.005 SW-REF1 05/13/2015 785 2660 <1 <1 3.6 315 338 0.002 35 <I <1 <1 <1 0.058 1.68 <1 <1 8.84 0.073 0.074 1.8 <0.1 <0.2 <0.2 120 4.5 5 0.451 1.09 0.016 0.007 Prepared by: BER/MAH Checked by: RKD Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02B Standard, April 22, 2015 Deg C = Degree Celsius Spec Cond = Specific Conductance mV = millivolts DO = Dissolved Oxygen mg/I = milligram per liter S.U. = standard unit TOT = Total ORP = Oxidation Reduction Potential DIS = Dissolved umhos/cm = micro mhos per centimeter NE = Not established Temp = Temperature NTUS = nephelometric turbidity unit < = concentration not detected at or above the reporting limit P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 9-3 Surface Water Analytical Results Page 2 of 2 TABLE 9-4 SUMMARY AND DESCRIPTION OF SEEP AND SURFACE WATER SAMPLE LOCATIONS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Location Relative to Ash Description of Sample Sample Designation Basin Location Flow from west engineered toe 5-01 Downstream drain Flow from east engineered toe S-02 Downstream drain Seep upgradient of east toe S-02A Downstream drain Seep upgradient of east toe S-02B Downstream drain Stream channel comprised of combined flow of east toe S-03 Downstream drain, seep S-02A, seep S- 02B. and seen S-08 Stream channel comprised of S-04 Downstream flow from west toe drain S-05 Ash Basin Water from ash basin Stream channel several 5-06 Upstream hundred feet from flow into Mavo Lake S-07 Upstream Seep near Plant entrance road Seep located northeast of ash S-08 Downstream basin dam; emerges from hillside Crutchfield Branch channel as stream flows off Mayo Plant SW-CB1 Downstream property and into culvert under Mayo Lake Road Crutchfield Branch channel as SW-CB2 Downstream stream flows into Virginia Stream channel downstream from culvert under Plant SW -REF Upstream entrance road; eventually flows to S-06 and Mayo Lake Prepared by: RKD Checked by: JAW P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 9-4 Summary Seep SW Locat Page 1 of 1 TABLE 9-5 NC DENR 2014 SEEP ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Aluminum Antimony Arsenic Barium Boron Cadmium Chloride Chromium Copper Fluoride Hardness Iron Lead Manganese Molybdenum Nickel Selenium Sulfate Thallium Total Dissolved Solids Zinc Reporting Units ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I mg/I mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I mg/I 15A NCAC 02L Standard NE 1* 10 700 700 2 250 10 1 2 NE 300 15 50 NE 100 20 250 0.2* 500 1 15A NCAC 02B Standard NE NE 30 NE NE NE 230 NE NE 1.8 100 1 NE I NE NE NE 25 5 250 NE 500 NE Sample ID Sample Description Sample Collection Date Analytical Results 2014007447 Outfall002 03/12/2014 110 1.02 4.11 114 8790 <1 320 2.17 <0.005 <1 652 97 <1 429 25.7 2.66 1.92 140 0.78 864 0.00829 2014007448 Outfall004 03/12/2014 284 <1 <1 41 79 <1 8 2.63 <0.005 <1 101 179 <1 <5 9.71 <1 1.45 91 <0.2 247 0.0144 2014007449 Outfall005 03/12/2014 2220 1.6 2.44 101 2370 1.09 120 6.29 0.01 <1 329 2520 4.09 161 13.6 5.76 11.6 150 0.34 499 0.819 2014007457 Ash Pond West Weir toe Drain 03/12/2014 23 <1 2.23 123 1450 <1 50 <5 <0.005 <1 87.8 13600 <1 2880 <1 <5 <1 41 <0.2 259 <0.005 2014007458 Ash Pond East Weir Toe Drain 03/12/2014 8 <1 <1 157 1570 <1 88 <5 <0.005 <1 140 4430 <1 2570 <1 <5 <1 47 <0.2 236 0.013 2014007459 Crutchfield Branch 03/12/2014 346 <1 <1 56 776 <1 40 <5 <0.005 <1 83.4 948 <1 758 <1 <5 <1 30 <0.2 160 0.006 2014007460 Ash Pond West Drainage Ditch 03/12/2014 119 <1 2.36 129 1020 <1 29 <5 <0.005 <1 82.1 17400 <1 2810 <1 <5 <1 28 <0.2 148 0.005 2014007461 Lake Intake 03/12/2014 47 <1 <1 52 1520 <1 66 <5 <0.005 <1 127 69 <1 39 5.2 <5 <1 33 <0.2 192 <0.005 Prepared by: BER/SRW Checked by: JAW Notes: C - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. C - Bold highlighted concentration indicates exceedance of the 15A NCAC 02B Standard, April 22, 2015. ug/I = micrograms per liter mg/I = milligrams per liter NE = Not established < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 9-5 NCDENR Analytical Results (2014 Seeps) Page 1 of 1 TABLE 9-6 15A NCAC 02B EXCEEDANCES IN SEEPS AND SURFACE WATER MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGESS, LLC, ROXBORO, NC Analytical Parameter pH Copper DIS Reporting Units S.U. mg/I 15A NCAC 02B Standard 6-9 0.0027 Sample ID Sample Collection Date Analytical Results S-02 05/12/2015 5.9 BE S-02B 05/13/2015 BE 0.00502 Prepared by: BER/SRW Checked by: JAW Notes: 0 Bold highlighted concentration indicates exceedance of the 15A NCAC 02B Standard, April 22, 2015. DIS = Dissolved S.U. = Standard Units mg/I = milligrams per liter BE = indicates concentration was below the 15A NCAC 02B Standard, April 22, 2015. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 9-6 2B Exceedances in Seeps and Surface Water Page 1 of 1 TABLE 10-1 GROUNDWATER ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Redox Assign Assignment PH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Alkalinity Aluminum Aluminum Antimony Antimony Arsenic Arsenic Barium Barium Beryllium Beryllium Bi-carbonate Alkalinity Boron Boron Cadmium Cadmium Calcium Carbonate Alkalinity Chloride Chromium Chromium Cobalt Cobalt Copper Copper DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT Reporting Units None S.U. ft Deg C u/gyms mg/I mV mV NTU mg/I mg/I ug/I ug/I ug/I ug/I ug/I ug/l ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I ug/I ug/I mg/I mg/I 15A NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE 1* NE 10 NE 700 NE 4* NE NE 700 NE 2 NE NE 250 NE 10 NE 1* NE 1 Sample ID Sample Collection Date Field Parameters Analytical Results ABMW-02BR 06/17/2015 Mixed (oxic-anoxic) 7.2 11.32 31 631 0.7 -57 148 3.28 0 260 <5 64 <1 <1 <1 <1 154 159 <1 <1 260 <50 <50 <1 <1 81.5 <10 27 <1 <1 <1 <1 <0.001 <0.001 ABMW-03S 06/17/2015 Anoxic 5.2 17.26 23 137 0.2 8 213 4.96 2.5 51 9 30 <1 <1 1.17 1.04 23 25 <1 <1 51 1070 1100 <1 <1 4.78 <10 6.9 <1 <1 3.96 3.98 <0.001 <0.001 ABMW-04BR 06/23/2015 Mixed (oxic-anoxic) 7.4 5.95 26 556 0.5 -244 -39 5.03 0.5 190 11 20 <1 <1 <1 1.08 113 115 <1 <1 190 <50 <50 <1 <1 85.3 <10 4.8 <1 <1 <1 <1 <0.001 <0.001 ABMW-04D 06/22/2015 Mixed (oxic-anoxic) 6.6 6.04 24 1174 0.7 231 436 2.03 4.5 530 84 199 3.45 3.68 140 140 774 755 <1 <1 530 5130 5090 <1 <1 143 <10 11 <1 <1 6.41 6.71 <0.001 <0.001 BG-01 04/13/2015 NC 5.5 30.16 17 154 1.2 296 501 8.9 NM 49.8 NA 392 NA <1 NA <1 NA 90 NA <1 49.8 NA <50 NA <1 12.5 <5 11 NA <5 NA <1 NA <0.005 BG-01 07/07/2015 NC 5.6 29.86 18 151 1.6 113 318 10 NM 48.3 NA 418 NA <1 NA <1 NA 97 NA <1 48.3 NA <50 NA <1 13.1 <5 11 NA <5 NA <1 NA <0.005 BG-02 04/13/2015 NC 6.3 31.93 18 652 0.2 1 -11 1 194 7.09 NM 259 NA 136 NA <1 NA <1 NA 54 NA <1 259 NA <50 NA <1 57 <5 28 NA <5 NA <1 NA <0.005 BG-02 DUP 04/13/2015 NC 6.3 31.93 18 652 0.2 -11 194 7.09 NM 254 NA 215 NA <1 NA <1 NA 55 NA <1 254 NA <50 NA <1 58.1 <5 28 NA <5 NA <1 NA <0.005 BG-02 07/07/2015 NC 6.5 31.53 19 623 0.3 -129 76 8.51 NM 225 NA 193 NA <1 NA <1 NA 54 NA <1 225 NA <50 NA <1 56.1 <5 30 NA <5 NA <1 NA <0.005 CW-01 04/13/2015 NC 5.7 16.99 19 178 3.8 310 515 2.63 NM 37.6 NA 791 NA <1 NA <1 NA 6 NA <1 37.6 NA <50 NA 1.23 10.6 <5 19 NA <5 NA <1 NA <0.005 CW-01 07/08/2015 NC 5.5 17.65 20 182 3.3 187 392 3 NM 33.1 NA 35 NA <1 NA <1 NA <5 NA <1 33.1 NA <50 NA <1 10.9 <5 23 NA <5 NA <1 NA <0.005 CW-01D 04/13/2015 NC 6.9 18.43 20 355 1.2 298 503 2.06 NM 143 NA 14 NA <1 NA <1 NA <5 NA <1 143 NA <50 NA <1 46.8 <5 10 NA <5 NA <1 NA <0.005 CW-01D 07/08/2015 NC 6.8 19.01 21 348 0.6 132 337 4.2 NM 140 NA 11 NA <1 NA <1 NA <5 NA <1 140 NA <50 NA <1 45.3 <5 10 NA <5 NA <1 NA <0.005 CW-02 04/14/2015 NC 5.0 1 12.36 13 1 215 1 1.9 323 528 1.09 NM <5 NA 34 NA <1 NA <1 NA 97 NA <1 <5 NA 524 NA <1 12 <5 33 NA <5 NA <1 NA <0.005 CW-02 07/07/2015 NC 5.1 13.33 16 286 0.8 214 419 0.96 NM <5 NA 16 NA <1 NA <1 NA 129 NA <1 <5 NA 004 NA <1 17.6 <5 54 NA <5 NA <1 NA <0.005 CW-02D 04/14/2015 NC 6.2 12.71 16 360 3.8 342 547 4.98 NM 41.1 NA 206 NA <1 NA <1 NA 42 NA <1 41.1 NA 325 NA <1 32.7 <5 44 NA <5 NA <1 NA <0.005 CW-02D 07/07/2015 NC 6.1 13.76 18 359 2.9 162 367 9.8 NM 42 NA 472 NA <1 NA <1 NA 38 NA <1 42 NA 363 NA <1 36.6 <5 42 NA <5 NA <1 NA <0.005 CW-03 04/14/2015 NC 6.4 15.60 16 654 2.5 352 557 2.31 NM 129 NA 63 NA <1 NA <1 NA 19 NA <1 129 NA <50 NA <1 64.2 <5 100 NA <5 NA <1 NA <0.005 CW-03 07/06/2015 NC 6.5 15.93 21 645 1 46 251 2.78 NM 136 NA 89 NA <1 NA <1 NA 19 NA <1 136 NA <50 NA <1 66.6 <5 100 NA <5 NA <1 NA <0.005 CW-04 04/14/2015 NC 5.9 21.38 16 164 2.7 314 519 1.85 NM 41 NA 76 NA <1 NA <1 NA 22 NA <1 41 NA <50 NA <1 10.9 <5 5.8 NA <5 NA <1 NA <0.005 CW-04 07/06/2015 NC 5.9 21.64 18 162 3 1 105 310 2.76 NM 44.1 NA 200 NA <1 NA <1 NA 25 NA <1 44.1 NA <50 NA <1 11.6 <5 6.4 NA <5 NA <1 NA <0.005 CW-05 04/14/2015 NC 6.6 3.95 15 415 0.8 61 266 7.62 NM 138 NA 163 NA <1 NA <1 NA 54 NA <1 138 NA <50 NA <1 1 46.1 <5 32 NA <5 NA 1 NA <0.005 CW-05 07/06/2015 NC 6.7 6.38 22 434 0.3 -110 96 8.68 NM 148 NA 272 NA <1 NA <1 NA 57 NA <1 148 NA <50 NA <1 51.2 <5 35 NA <5 NA <1 NA <0.005 CW-06 04/14/2015 NC 6.6 10.54 15 812 0.2 -127 78 6.33 NM 228 NA 55 NA <1 NA <1 NA 42 NA <1 228 NA <50 NA <1 93.8 <5 81 NA <5 NA <1 NA <0.005 CW-06 07/06/2015 NC 6.7 12.12 17 890 0.4 -188 17 1.72 NM 270 NA 57 NA <1 NA <1 NA 48 NA <1 270 NA <50 NA <1 108 <5 89 NA <5 NA <1 NA <0.005 CW-06 DUP 07/06/2015 NC 6.7 12.12 17 890 0.4 -188 17 1.72 NM 268 NA 59 NA <1 NA <1 NA 49 NA <1 268 NA <50 NA <1 108 <5 89 NA <5 NA <1 NA <0.005 MW-02 03/19/2015 Mixed (anoxic) 5.8 26.11 11 339 0.32 183 388 33.9 0.5 89 74 834 <1 <1 <1 <1 53 55 <1 <1 89 <50 <50 <1 <1 18.6 <10 15 <1 <1 2.64 2.78 <0.001 <0.001 MW-03 03/19/2015 Mixed (oxic-anoxic) 5.7 6.51 11 343 1.65 304 509 3.35 NM 61 <5 34 <1 <1 <1 <1 54 56 <1 <1 61 815 847 <1 <1 27.9 <10 47 <1 <1 <1 <1 <0.001 <0.001 MW-03BR 03/14/2015 NM NM NM NM NM NM NM NM NM NM 200 NA 118 NA <1 NA <1 NA 46 NA <1 190 NA <50 NA <1 145 <10 160 NA <1 NA <1 NA <0.001 MW-03BR 03/19/2015 Mixed (anoxic) 6.9 16.41 11 847 0.46 -19 186 5.84 NM NA <5 NA <1 NA <1 NA 45 NA <1 NA NA <50 NA <1 NA NA NA NA <1 NA <1 NA <0.001 NA MW-04 03/20/2015 Oxic 6.3 25.98 9 291 5.42 242 447 10.3 0 88 33 118 <1 <1 <1 <1 5 6 <1 <1 88 <50 <50 <1 <1 28.4 <10 6.6 <1 <1 <1 <1 <0.001 0.00101 MW-0SBR 03/11/2015 Anoxic 7.1 6.30 14 491 0.29 55 214 4.95 2.5 180 10 57 <1 <1 <1 I <1 33 1 31 <1 <1 180 <50 <50 <1 <1 95.9 <10 62 <1 <1 <1 <1 <0.001 <0.001 MW-07BR 06/19/2015 Mixed (anoxic) 7.4 7.42 25 470 0.34 -200 5 4.09 <0.5 210 7 15 <1 <1 <1 <1 138 140 <1 <1 200 <50 <50 <1 <1 57.3 <10 15 <1 <1 <1 <1 <0.001 <0.001 MW-07D 06/19/2015 Mixed (oxic-anoxic) 6.4 9.30 24 668 2.37 -8 197 12.1 0 180 <5 147 <1 <S <1 <S 23 24 <1 <1 180 <50 <50 <1 <1 59.5 <10 78 <1 <1 <1 <1 <0.001 <0.001 MW-08BR' 03/12/2015 Mixed (anoxic) 6.6 35.26 15 777 0.2 -73 132 97.8 2 170 <5 5310 <1 <1 <1 2.52 88 234 <1 <1 170 <50 <50 <1 <1 1 99.1 <10 120 <1 87.5 1.82 6.19 <0.001 0.0246 MW-08BR 06/18/2015 Anoxic 6.6 34.38 18 858 0.3 -149 56 4.33 2.5 200 7 110 <1 <1 <1 <1 65 66 <1 <1 200 <50 <50 <1 <1 91.5 <10 120 <1 <1 <1 <1 <0.001 <0.001 MW-09BR 06/18/2015 Mixed (oxic-anoxic) 6.3 24.89 24 226 0.7 2 207 45.6 NM 72 11 3720 <1 <1 <1 <1 25 30 <1 <1 72 <50 <50 <1 <1 22.6 <10 16 <1 3.4 <1 <1 0.00229 0.00591 MW-10BR 03/17/2015 Anoxic 7.9 13.19 22 461 0.55 -99 106 35.5 0.5 110 13 641 <1 <1 <1 <1 25 27 <1 <1 110 <50 <50 <1 <1 36.8 <10 23 <1 1.3 <1 <1 <0.001 <0.001 MW-11BR 06/25/2015 Mixed (oxic-anoxic) 8.1 40.25 19 382 2.79 28 233 3.91 0 160 16 80 1.61 1.32 <1 <1 46 44 <1 <1 160 <50 <50 <1 <1 49.6 <10 16 1.59 1.73 <1 <1 0.00772 <0.001 MW-12D 06/24/2015 Mixed (oxic-anoxic) 6.2 31.15 17 136 2.42 -1 204 4.02 0 53 <5 184 1.66 1.63 <1 <1 23 26 <1 <1 53 <50 <50 <1 <1 12.6 <10 4 <1 <1 1.28 1.37 <0.001 <0.001 MW-12S 06/18/2015 Mixed (oxic-anoxic) 5.7 30.61 21 55 3.66 127 332 10.6 <0.5 14 <5 292 <1 <1 <1 <1 23 24 <1 <1 14 <50 <50 <1 <1 2.36 <10 3.1 <1 1.61 1.02 1.09 <0.001 <0.001 MW-13BR 06/23/2015 Anoxic 7.2 31.28 21 580 0.4 -228 -23 2.22 1 210 27 37 <1 <1 <1 <1 41 40 <1 <1 210 <50 <50 <1 <1 75.2 <10 46 <1 <1 <1 1.19 <0.001 <0.001 MW-14BR 03/12/2015 Mixed (anoxic) 6.7 16.20 14 278 0.47 41 224 35 0.5 96 9 589 <1 <1 <1 <1 28 30 <1 <1 96 <50 <50 <1 <1 19.5 <10 9.3 <1 <1 1.41 1.41 <0.001 0.0045 MW-16BR 06/23/2015 Oxic 8.7 3.75 25 239 0.89 -191 14 4.66 NM 97 22 88 <1 <1 2.07 2.05 9 11 <1 <1 96 <50 <50 <1 <1 22.5 <10 7 <1 <1 <1 <1 <0.001 <0.001 MW-16D 06/23/2015 Mixed (oxic-anoxic) 7.1 3.51 19 221 2.49 55 260 9.38 0 76 <5 102 <1 <1 <1 <1 12 13 <1 <1 75 <50 <50 <1 <1 25.6 <10 8.8 <1 <1 <1 <1 <0.001 <0.001 MW-16D DUP 06/23/2015 Mixed (oxic-anoxic) 7.1 3.51 19 221 2.49 55 260 9.38 0 76 <S 86 <1 <S <1 <S 13 13 <1 <1 76 <50 <50 <1 <1 25.4 <10 8.9 <1 <1 <1 <1 <0.001 <0.001 MW-16S 06/23/2015 Mixed (oxic-anoxic) 6.0 3.88 20 1. 29.6 96 301 3.44 NM 43 <5 17 <1 <1 <1 <1 46 46 <1 <1 43 <50 <50 <1 <1 9.57 <10 13 <1 <1 4.35 1 4.32 1 0.00418 0.00102 Notes: = - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. Spec Cond = Specific Conductance Deg C = Degrees Celsius NTU = Nephelometric turbidity unit DUP = Duplicate umhos/cm = Micro mhos per centimeter NE = Not established S.U. = Standard Unit mg/I = Milligram per liter DIS = Dissolved ft = Feet my = Millivolts TOT= Total NA = Not analyzed ug/I = Microgram per liter NC = Not calculated mg - N/L = Milligram nitrogen per liter < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. t Data invalid. Sample inadvertently collected before well development. DO = Dissolved oxygen ORP = Oxidation -Reduction Potential Eh = Oxidation Potential NM = Not measured Perpared by: BE LAM Checked by: KLS Revised by: EMBtecked by: _BDW_ P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\l.11 CSA Reporting\FINAL\TABLES\Table 10-1 Groundwater Analytical Results TABLE 10-1 GROUNDWATER ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Iron Iron Lead Lead Magnesium Manganese Manganese Mercury Mercury Methane Molybdenum Molybdenum Nickel Nickel Nitrate it N) Potassium Selenium Selenium Sodium Strontium Strontium Sulfate Sulfide Thallium Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Vanadium Zinc Zinc DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units ug/I ug/1 ug/1 ug/1 mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg-N/L mg/I ug/I ug/I mg/I mg/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I 15A NCAC 02L Standard NE 300 NE 15 NE NE s0 NE 1 NE NE NE NE 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* 500 NE NE NE 0.3* NE 1 Sample ID Sample Collection Date Analytical Results ABMW-02BR 06/17/2015 24 107 <1 <1 13.2 146 149 <0.05 <0.05 <10 5.76 5.67 <1 <1 0.223 4.38 <1 <1 26 1.24 1.27 12 <0.1 <0.2 <0.2 370 0.949 <5 0.658 0.87 <0.005 <0.005 ABMW-03S 06/17/2015 2490 2630 <1 <1 0.695 463 478 <0.05 <0.05 38 <1 <1 1.05 <1 <0.01 0.605 <1 <1 19.4 0.058 0.059 <0.1 <0.1 <0.2 <0.2 110 1 <5 <0.3 <0.3 0.008 0.007 ABMW-04BR 06/23/2015 1420 1590 <1 <1 5.97 410 407 <0.05 <0.05 <10 6.1 6.12 <1 <1 <0.01 6.23 <1 <1 21.2 2.02 2.02 BO <0.1 <0.2 <0.2 370 1.8 <5 <0.3 0.38 <0.005 <0.005 ABMW-04D 06/22/2015 30400 28300 <1 <1 45.1 4120 3640 <0.05 <0.05 21000 212 269 1.68 1.63 <0.01 34.9 <1 <1 22.9 2.99 3.07 19 <0.5 <0.2 <0.2 680 5.5 63 11.9 23.3 0.014 0.007 BG-01 04/13/2015 NA 409 NA <1 3.35 NA 35 NA <0.05 NA NA <1 NA <5 NA 1.4 NA <1 12.4 NA NA 0.32 NA NA <0.2 130 NA 5 NA NA NA 0.029 BG-01 07/07/2015 NA 557 NA <1 3.63 NA 23 NA <0.05 NA NA <1 NA <5 0.64 1.5 NA <1 11.8 NA NA 0.32 NA NA <0.2 130 NA 5 NA 4.94 NA 0.05 BG-02 04/13/2015 NA 435 NA <1 11.8 NA 150 NA 0.06 NA NA <1 NA <5 NA 3.27 NA <1 49.7 NA NA 4.8 NA NA <0.2 380 NA 8 NA NA NA 0.011 BG-02 DUP 04/13/2015 NA 546 NA <1 12.1 NA 155 NA 0.05 NA NA <1 NA <5 NA 3.3 NA <1 50.3 NA NA 4.7 NA NA <0.2 360 NA 7 NA NA NA 0.01 BG-02 07/07/2015 NA 467 NA <1 12 NA 135 NA <0.05 NA NA <1 NA <5 <0.023 3.61 NA <1 48.2 NA NA 5.1 NA NA <0.2 370 NA 8 NA 5.88 NA 0.015 CW-01 04/13/2015 NA 608 NA <1 5.03 NA 27 NA <0.05 NA NA <1 NA <5 NA 1.13 NA <1 17.3 NA NA 10 NA NA <0.2 160 NA it NA NA NA 0.013 CW-Ol 07/08/2015 NA 31 NA <1 4.97 NA 6 NA <0.05 NA NA <1 NA <5 1.4 1.05 NA <1 17 NA NA 9.5 NA NA <0.2 150 NA <5 NA 0.54 NA 0.01 CW-01D 04/13/2015 NA 11 NA <1 9.35 NA 6 NA <0.05 NA NA 21.7 NA <5 NA 1.99 NA <1 13.3 NA NA 5 NA NA <0.2 210 NA <5 NA NA NA <0.005 CW-01D 5 NA <10 NA <1 9.67 NA <5 NA <0.05 NA NA 20.8 NA <5 0.45 2.14 NA <1 12.8 NA NA 4.1 NA NA <0.2 200 NA <5 NA 1.09 NA <0.005 CW-02 NA 17 NA <1 6.58 NA 170 NA <0.05 NA NA <1 NA <5 NA 1.61 NA <1 12.9 NA NA 39 NA NA <0.2 140 NA <5 NA NA NA <0.005 CW-02 5 NA <10 NA <1 8.68 NA 393 NA <0.05 NA NA <1 NA <5 <0.023 1.97 NA <1 17.3 NA NA 49 NA NA <0.2 210 NA <5 NA <0.3 NA 0.008 CW-02D R04/14/2015 5 NA 149 NA <1 8.14 NA 123 NA <0.05 NA NA <1 NA <5 NA 2.82 NA <1 17.4 NA NA 50 NA NA <0.2 240 NA 14 NA NA NA 0.02 CW-02D 5 NA 278 NA <1 8.39 NA 81 NA <0.05 NA NA <1 NA <5 <0.023 2.81 NA <1 17.6 NA NA 49 NA NA <0.2 250 NA 21 NA 0.59 NA 0.016 CW-03 S NA 53 NA <1 8.28 NA 9 NA <0.05 NA NA <1 NA <5 NA 4.68 NA <1 46.1 NA NA 15 NA NA <0.2 440 NA <5 NA NA NA <0.005 CW-03 5 NA 71 NA <1 8.35 NA <5 NA <0.05 NA NA <1 NA <5 0.32 4.76 NA <1 44.5 NA NA 15 NA NA <0.2 440 NA <5 NA 1.41 NA 0.11 CW-04 04/14/201S NA 37 NA <1 3.05 NA <5 NA <0.05 NA NA <1 NA <5 NA 1.26 NA <1 15 NA NA 18 NA NA <0.2 150 NA <5 NA NA NA <0.005 CW-04 07/06/201S NA 87 NA <1 3.21 NA <5 NA <0.05 NA NA <1 NA <5 0.14 1.25 NA <1 15.5 NA NA 19 NA NA <0.2 160 NA <5 NA 1.02 NA <0.00s CW-05 04/14/201S NA 731 NA <1 7.33 NA 696 NA <0.05 NA NA 1.08 NA <5 NA 5.78 NA <1 18.2 NA NA 8.7 NA NA <0.2 270 NA <5 NA NA NA <0.005 CW-05 07/06/201S NA 1060 NA <1 7.6 NA 785 NA <0.05 NA NA <1 NA <5 <0.023 5.88 NA <1 18 NA NA 7.5 NA NA <0.2 290 NA 6 NA <0.3 NA <0.005 CW-06 04/14/201S NA 1370 NA <1 19.1 NA 1300 NA <0.05 NA NA 8.17 NA <5 NA 10.2 NA 1.48 37.6 NA NA 41 NA NA <0.2 540 NA <5 NA NA NA <0.005 CW-06 07/06/201S NA 2040 NA <1 19.8 NA 1450 NA <0.05 NA NA 6.86 NA <5 <0.023 13.2 NA <1 38.9 NA NA 47 NA NA <0.2 560 NA 5 NA <0.3 NA <0.00s CW-06 DUP 07/06/201S NA 2060 NA <1 20.4 NA 1470 NA <0.05 NA NA 7.2 NA <5 <0.023 13.4 NA <1 39.7 NA NA 47 NA NA <0.2 570 NA <5 NA <0.3 NA <0.005 MW-02 03/19/201S 389 756 <1 <1 7.31 836 833 <0.05 <0.05 780 <1 <1 1.94 1 2.31 0.19 4.44 <1 <1 27.7 0.186 0.184 18 <1 I <0.2 <0.2 1 200 1.5 7 0.973 1.68 <0.005 <0.005 MW-03 03/19/201S <10 34 <1 <1 8.83 827 880 <0.05 <0.05 <10 <1 <1 2.06 2.22 0.07 1.84 <1 <1 22 0.331 0.336 21 <2 <0.2 <0.2 190 0.875 <5 <0.3 <0.3 <0.005 1 <0.005 MW-03BR 03/14/201S NA 648 NA <1 11.5 NA 731 NA <0.05 <10 NA 1.39 NA <1 <0.01 7.76 NA <1 20.4 NA 0.417 1 9.4 <0.5 NA <0.2 660 1.8 <5 NA 0.78 NA <0.00s MW-03BR 03/19/201S 521 NA <1 NA NA 714 NA <0.05 NA NA 1.6 NA <1 NA NA NA <1 NA NA 0.403 NA NA NA <0.2 NA NA NA NA <0.3 NA <0.005 NA MW-04 03/20/201S 13 70 <1 <1 6.96 6 is <0.05 <0.05 <10 2.3 2.38 <1 <1 0.295 5.48 <1 <1 17.8 0.098 0.099 34 <1 <0.2 <0.2 190 0.553 <5 0.596 0.89 0.008 0.009 MW-05BR 03/11/201S 3510 4240 <1 <1 6.91 1870 1740 <0.05 <0.05 11 3.81 4.27 <1 <1 <0.01 5.76 <1 <1 17.2 0.212 0.209 3.8 <0.1 <0.2 <0.2 380 2.2 12 <0.3 <0.3 <0.005 <0.005 MW-07BR 06/19/201S 223 339 <1 <1 12.1 263 263 <0.05 <0.05 I <10 3.57 3.72 <1 <1 <0.01 4.92 <1 <1 18.2 0.986 0.988 1.6 0.112 <0.2 I <0.2 270 1.9 <5 <0.3 <0.3 <0.005 <0.00s MW-07D 06/19/201S <10 69 <1 <1 26.4 176 1188 <0.05 <0.05 <10 1.46 1.35 1.01 1 <1 <0.01 2.66 <1 <1 30.7 0.43 0.442 9 <0.1 <0.2 <0.2 390 1.2 <5 0.68 0.80 1 <0.005 <0.005 MW-0813111 03/12/201S 1490 9420 <1 11.7 26 3960 5040 <0.05 <0.05 <10 14.5 15 6.29 38.5 <0.01 6.6 <1 <1 39.6 0.405 0.459 39 <0.5 <0.2 <0.2 470 2.2 640 <0.3 12.3 0.04 0.137 MW-08BR 06/18/201S 2030 2200 <1 <1 23.1 2630 2680 <0.05 <0.05 <10 3.84 5.86 <1 1.42 0.016 5.43 <1 <1 43.8 0.418 0.425 33 0.196 <0.2 <0.2 550 1.8 8 <0.3 <0.3 0.01 0.088 MW-09BR 06/18/201S 102 3000 <1 <1 3.93 768 809 <0.05 <0.05 <10 2.44 1.75 1.01 1.43 0.086 3.09 <1 <1 13.3 0.108 0.109 8.9 <1 <0.2 <0.2 220 3.6 10 0.633 4.17 0.011 0.009 MW-10BR 03/17/201S 286 883 <1 <1 15.5 954 894 <0.5 <0.05 <10 2.54 2.37 1.91 3.09 <0.01 8.66 <1 <1 37.9 0.21 0.21 83 <10 <0.2 <0.2 330 2 17 0.861 1.66 0.006 0.009 MW-11BR 06/25/201S <10 115 <1 <1 11.1 73 67 <0.05 <0.05 <10 5.04 5.41 <1 <1 <0.01 5.03 <1 <1 14.3 0.225 0.2 14 <0.1 <0.2 0.32. 250 1.1 <5 2.39 2.69 0.012 <0.005 MW-12D 06/24/201S 95 326 <1 <1 3.44 674 683 <0.05 <0.05 <10 1.63 1.75 1.82 2.5 0.08 1.6 <1 <1 8.98 0.094 0.095 0.96 <0.1 <0.2 <0.2 120 0.396 <5 0.642 0.72 0.006 <0.005 MW-12S 06/18/201S <10 295 <1 <1 0.643 249 267 <0.05 <0.05 <10 <1 <1 1.35 1.45 1 1.86 <1 <1 6.79 0.03 0.027 1.9 <0.1 <0.2 <0.2 50 1 0.68 <5 <0.3 0.40 0.056 0.067 MW-13BR 06/23/201S 1160 1130 <1 <1 13.1 486 474 <0.05 <0.05 <10 7.2 8.28 <1 <1 <0.01 5.49 <1 <1 25.7 0.423 0.418 18 0.115 <0.2 <0.2 370 0.9 5 1<0.3 0.38 1 0.019 0.036 MW-14BR 03/12/201S 485 907 <1 <1 2.96 543 544 <0.05 <0.05 <10 14.6 14 <1 <1 0.039 4.08 <1 <1 33 0.145 0.149 12 <1 <0.2 <0.2 190 1.3 14 0.758 1.29 0.008 0.01 MW-16BR 06/23/201S 12 80 <1 <1 3.89 25 30 <0.05 <0.05 <10 21.8 23.4 <1 <1 <0.01 1.7 <1 <1 23.9 0.112 0.112 12 0.264 <0.2 <0.2 170 3.7 6 2.68 2.79 <0.005 <0.005 MW-16D 06/23/201S <10 87 <1 <1 5.16 260 269 <0.05 <0.05 <10 10.9 10.1 <1 <1 2.9 2.32 <1 <1 9.77 0.163 0.163 7.7 <0.1 <0.2 <0.2 160 0.208 <5 0.53 0.62 0.009 <0.005 MW-16D DUP 06/23/201S <10 85 <1 <1 5.1 250 261 <0.05 <0.05 <10 1 10.6 11.3 <1 <1 2.9 2.31 <1 <1 9.72 0.179 0.163 7.8 <0.1 <0.2 <0.2 150 0.214 <5 0.537 0.73 0.093 <0.00S MW-16S 06/23/2015 470 860 <1 <1 4.01 276 260 <0.05 <0.05 <10 1.23 1.24 1.63 1.57 0.144 2.06 <1 <1 11.2 0.111 0.109 5.3 <0.1 <0.2 <0.2 100 0.508 <5 <0.3 0.30 0.065 0.039 Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. Spec Cond = Specific Conductance Deg C = Degrees Celsius NTU = nephelometric turbidity unit DUP = Duplicate umhos/cm = micro mhos per centimeter NE = Not established S.U. = Standard Unit mg/I = milligram per liter DIS = Dissolved ft = feet my = millivolts TOT= Total NA = Not analyzed ug/I = microgram per liter NC = Not calculated mg - N/L = milligram nitrogen per liter < = concentration not detected at or above the reporting limit = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. t Data invalid. Sample inadvertently collected before well development. DO = Dissolved oxygen ORP = Oxidation -Reduction Potential Eh = Oxidation Potential NM = Not measured Perpared by: BER LAM Checked by: KLS Revised by: EMB ecked by: BDW_ P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\l.11 CSA Reporting\FINAL\TABLES\Table 10-1 Groundwater Analytical Results Page 2 of 2 TABLE 10-2 15A NCAC 02L EXCEEDANCES IN GROUNDWATER MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter PH Antimony Arsenic Barium Boron Chromium Cobalt Iron Manganese Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ug/I ug/1 ug/1 ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 1* 10 700 700 10 1* 300 50 0.2* 500 0.3* Sample ID Sample Collection Date Analytical Results ABMW-02BR 06/17/2015 BE BE BE BE BE BE BE BE 149 BE BE 0.87 ABMW-03S 06/17/2015 5.2 BE BE BE 1100 BE 3.98 2630 478 BE BE BE ABMW-03S 06/22/2015 5.5 BE BE BE BE BE BE BE BE BE BE BE ABMW-04BR 06/23/2015 BE BE BE BE BE BE BE 1590 407 BE BE 0.38 ABMW-04D 06/22/2015 BE 3.68 140 755 5090 BE 6.71 28300 3640 BE 680 23.3 BG-01 04/13/2015 5.5 BE BE BE BE BE BE 409 BE BE BE BE BG-01 07/07/2015 5.6 BE BE BE BE BE BE 557 BE BE BE 4.94 BG-02 04/13/2015 6.3 BE BE BE BE BE BE 435 ISO BE BE BE BG-02 DUP 04/13/2015 6.3 BE BE BE BE BE BE 546 155 BE BE BE BG-02 07/07/2015 BE BE BE BE BE BE BE 467 135 BE BE 5.88 CW-01 04/13/2015 5.7 BE BE BE BE BE BE 608 BE BE BE BE CW-01 07/08/2015 5.5 BE BE BE BE BE BE BE BE BE BE 0.54 CW-01D 07/08/2015 BE BE BE BE BE BE BE BE BE BE BE 1.09 CW-02 04/14/2015 5.0 BE BE BE BE BE BE BE 170 BE BE BE CW-02 07/07/2015 5.1 BE BE BE 804 BE BE BE 393 BE BE BE CW-02D 04/14/2015 6.2 BE BE BE BE BE BE BE 123 BE BE BE CW-02D 07/07/2015 6.1 BE BE BE BE BE BE BE 81 BE BE 0.59 CW-03 04/14/2015 6.4 BE BE BE BE BE BE BE BE BE BE BE CW-03 07/06/2015 BE BE BE BE BE BE BE BE BE BE BE 1.41 CW-04 04/14/2015 5.9 BE BE BE BE BE BE BE BE BE BE BE CW-04 07/06/2015 5.9 BE BE BE BE BE BE BE BE BE BE 1.02 CW-05 04/14/2015 BE BE BE BE BE BE BE 731 696 BE BE BE CW-05 07/06/2015 BE BE BE BE BE BE BE 1060 785 BE BE BE CW-06 04/14/2015 BE BE BE BE BE BE BE 1370 1300 BE 540 BE CW-06 07/06/2015 BE BE BE BE BE BE BE 2040 1450 BE 560 BE CW-06 DUP 07/06/2015 BE BE BE BE BE BE BE 2060 1470 BE 570 BE MW-02 03/19/2015 5.8 BE BE BE BE BE 2.78 756 833 BE BE 1.68 MW-03 03/19/2015 5.7 BE BE BE 847 BE BE BE 880 BE BE BE MW-03 06/23/2015 6.0 BE BE BE BE BE BE BE BE BE BE BE MW-03BR 03/14/2015 BE BE BE BE BE BE BE 648 731 BE 660 0.78 MW-04 03/20/2015 6.3 BE BE BE BE BE BE BE BE BE BE 0.89 MW-05BR 03/11/2015 BE BE BE BE BE BE BE 4240 1740 BE BE BE MW-07BR 06/19/2015 BE BE BE BE BE BE BE 339 263 BE BE BE MW-07D 06/19/2015 6.4 BE BE BE BE BE BE BE 188 BE BE 0.798 MW-08BR' 03/12/2015 BE BE BE BE BE 87.5 6.19 9420 5040 BE BE 12.3 MW-08BR 06/18/2015 BE BE BE BE BE BE BE 2200 2680 BE 550 BE MW-09BR 06/18/2015 6.3 BE BE BE BE BE BE 3000 809 BE BE 4.17 MW-10BR 03/17/2015 BE BE BE BE BE BE BE 883 894 BE BE 1.66 MW-11BR 06/25/2015 BE 1.32 BE BE BE BE BE BE 67 0.32 BE 2.69 MW-12D 06/24/2015 6.2 1.63 BE BE BE BE 1.37 326 683 BE BE 0.72 MW-12S 06/18/2015 5.7 BE BE BE BE BE 1.09 BE 267 BE BE 0.40 MW-13BR 06/23/2015 BE BE BE BE BE BE 1.19 1130 474 BE BE 0.38 W-14BR 03/12/2015 BE BE BE BE BE 1.41907 544 BE 1.29 W-16BR 06/23/2015 8.7 BE BE BE BE BE BE BE BE BE 2.79 W-16D06/23/2015 L BE BE BE n BE BE BE BE 269 BE BE 0.62 -16D DUP 06/23/2015 BE BE BE BE BE BE BE 261 BE BE 0.73 W-165 06/23/2015 6.0 BE BE BE BE 4.32 860 260 BE BE 0.30 Prepared by: BER/SRW Checked by: JAW Notes: 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ug/I = microgram per liter mg/I = milligrams per liter S.U. = Standard Units DUP = Duplicate Data invalid. Sample inadvertently collected before well development. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. BE = indicates concentration was below the 15A NCAC 02L Standard, April 1, 2013. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 10-2 2L Exceedances in Groundwater.xlsx Page 1 of 1 TABLE 10-3 IRON AND MANGANESE FROM APRASA STUDY AREA* MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC 15A NCAC Number of Mean 5th 95th Constituent 02L .0202 Analyses Value Percentile Percentile Standard Iron, total (pg/L) 300 3,109 3,805 17 12,000 Manganese, total (pg/L) 50 2,175 1,000 0.1 3,958 Revised by: EMB Checked by: JAW Notes: pg/L = Micrograms per liter * results for iron and manganese from from the Appalachian Valleys -Piedmont Regional Aquifer -System Analysis (APRASA) study area described by Daniel and Dahlen (2002) P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 10-3 Iron and Manganese from APRASA Study Area.xlsx 1 of 1 TABLE 10-4 VALENCE SPECIATION OF AQUEOUS SAMPLES MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Cr(VI) Fe(II) Fe(III) Mn(II) Mn(IV) Reporting Units ug/I ug/I ug/I ug/I ug/I Sample ID Sample Collection Date Analytical Results ABMW-02BR 06/22/2015 0.007 11.8 <5 139 10 ABMW-03S 06/22/2015 <0.005 4010 <500 742 66.4 ABMW-04BR 06/23/2015 0.005 1100 280 445 40.4 ABMW-04D 06/22/2015 <0.005 29500 2400 4190 <0.18 BG-02 07/07/2015 <0.021 331 <5 141 8.53 CW-02 07/07/2015 0.1 <5 7 347 19.3 CW-02D 07/07/2015 0.084 <5 7 7 77.7 EB-01 07/07/2015 <0.021 <5 <5 <0.46 <0.39 Equipment Blank 06/25/2015 <0.003 <5 <5 <0.82 <0.18 MW-03 06/23/2015 0.155 <5 <5 1370 <0.44 MW-12D 06/25/2015 0.334 82.1 <5 830 <0.18 MW-13BR 06/23/2015 0.005 1200 <250 483 4.67 MW-16BR 06/23/2015 0.017 9.6 <5 26.9 5.54 MW-16D 06/23/2015 0.051 <5 9.4 291 9.17 MW-16D DUP 06/23/2015 0.061 <5 <5 278 15.4 MW-16S 06/23/2015 0.011 190 <5 282 30.6 5-05 07/07/2015 0.612 <5 11.6 6.78 32 Prepared by: EMB Checked by: RLP Notes• ug/I = microgram per liter < = concentration not detected at or above the reporting limit. DUP = duplicate * 5-05 is a wastewater sample collected from the east side of the ash basin, adjacent to the Forebay. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 10-4 Valence Speciation of Aqueous Samples Page 1 of 1 TABLE 10-5 CHARGE BALANCE SUMMARY MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Sample ID Anions Cations Percent Difference Alluvial MW-16S 0.70 1.38 32.7 M W-3 1.95 3.39 27.0 Ask Pore Water ABMW-01 7.59 12.1 23.0 ABMW-02 5.70 9.62 25.5 ABMW-03 3.88 5.16 14.1 ABM W-04 6.79 11.3 24.9 Bedrock - ABM W -02BR 4.76 6.43 14.9 ABM W -04BR 4.67 5.94 12.0 BG-1 0.44 1.51 54.5 CW-1D 2.07 3.67 27.9 CW-2D 2.45 3.36 15.6 CW-4 0.76 1.55 34.0 CW-5 2.82 4.11 18.7 CW-6 6.58 9.05 15.8 MW-03BR 8.60 x 10-5 5.40 x 10-2 99.7 M W-05BR 4.34 6.45 19.5 MW-07BR 3.47 4.81 16.2 MW-08BR 6.12 8.71 17.4 MW-09BR 1.19 2.18 29.5 MW-lOBR 4.13 5.03 9.8 MW-11BR 3.34 4.15 10.8 MW-13BR 4.70 6.16 13.5 MW-14BR 1.59 2.82 27.7 MW-16BR 2.06 2.53 10.3 M W-2 1.12 2.95 45.0 M W-4 1.57 2.91 29.8 Saprolite ABMW-03S 0.25 1.57 72.5 MW-12S 0.18 0.53 48.3 Transition ABMW-04D 6.38 15.5 41.6 BG-02 3.12 5.98 31.4 CW-01 0.94 1.72 29.7 CW-02 2.54 2.40 2.82 CW-03 4.45 6.07 15.4 M W-07D 3.96 6.56 24.7 MW-12D 0.51 1.37 46.2 MW-16D 1.50 2.20 19.0 Seep 5-01 2.79 4.44 22.8 5-02 2.92 4.25 18.6 S-02B 3.15 4.30 15.4 5-03 2.63 3.65 16.3 5-04 2.54 4.02 22.7 5-05* 3.41 4.16 9.92 5-06 1.10 1.75 22.8 5-08 3.86 4.77 10.6 Surface Water SW-CB1 1.96 3.14 23.1 S W -CB2 1.37 2.27 24.6 SW-REF1 0.63 1.00 22.9 Notes: * 5-05 is a wastewater sample collected from the east side of the ash basin, adjacent to the Forebay. Prepared by: bRW cnecked by: IM2 Revised by: EMB Rechecked by: JAW P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 10-5 Charge Balance Summary Page 1 of 1 TABLE 10-6 RADIOLOGICAL ANALYTICAL RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Radium-226 Radium-228 Uranium-233 Uranium-234 Uranium-236 Uranium-238 Reporting Units pCi/I pCi/I ug/ml ug/ml ug/ml ug/ml Sample ID Sample Collection Date Analytical Results CW-2 07/07/2015 1.61 <3.00 <5.00 x 10-5 <5.00 x 10-5 <5.00 x 10-5 2.57 x 10-4 CW-2D 07/07/2015 0.79 <3.00 <5.00 x 10-5 <5.00 x 10-5 <5.00 x 10-5 3.54 x 10-4 MW-3 06/23/2015 3.13 <3.00 <5.00 x 10-5 <5.00 x 10-5 <5.00 x 10-5 1.73 x 10-3 MW-12S 06/24/2015 0.84 <3.00 <5.00 x 10-5 <5.00 x 10-5 <5.00 x 10-5 <2.00 x 10-4 MW-13BR 06/23/2015 1.22 <3.00 <5.00 x 10-5 <5.00 x 10-5 <5.00 x 10-5 <2.00 x 10-4 Notes• pCi/I = picocuries per liter ug/ml = microgram per milliliter < = concentration not detected at or above the reporting limit Prepared by: BER LAM c;heckecl by: KKD Revised by: EMB Rechecked by: _BDV P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 10-6 Radiological Analytical Results.xlsx Page 1 of 1 TABLE 11-1 SUMMARY OF SLUG TEST RESULTS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Hydrogeologic Unit Hydraulic Conductivity Geometric Mean Highest Conductivity Lowest Conductivity cm/sec ft/day cm/sec ft/day cm/sec ft/day Ash Basin (4 wells) 1.3E-04 3.7E-01 1.5E-03 4.1E+00 1.7E-05 4.8E-02 Alluvium (1 well) 6.1E-06 1.7E-02 6.1E-06 1.7E-02 6.1E-06 1.7E-02 Saprolite (2 wells) 7.5E-05 2.1E-01 1.6E-04 4.6E-01 7.8E-06 2.2E-02 Transition Zone (3 wells) 5.3E-05 1.5E-01 1.1E-03 3.0E+00 6.8E-06 1.9E-02 Bedrock (14 wells) 7.9E-05 2.2E-01 2.0E-03 5.7E+00 1.1E-06 3.2E-03 Prepared by: EMB Checked by: JAW Notes: cm/sec = centimeter per second ft/day = feet per day P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 11-1 Summary of Slug Test.xlsx Page 1 of 1 TABLE 12-1 RISK SCREENING TABLE: COAL ASH PORE WATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Chromium Water Spec Ferrous Aluminum Antimony Arsenic Barium Beryllium Bi- Boron Cadmium Calcium Carbonate (III)/Chro Cobalt Copper Analytical Parameter Redox Assignment pH Level Temp Cond DO ORP Eh Turbidity Iron Alkalinity carbonate Alkalinity Chloride mium (VI) Alkalinity DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT Reporting Units P 9 None S.U. ft De C 9 umhos cm m /I 9 mV mV NTU m /I 9 m /I 9 u /I 9 ug/I u /I 9 ug/I ug/I ug/I ug/I u /I 9 u /I 9 ug/I m /1 9 u /I 9 u /I 9 1 ug/I ug/I m /I 9 m /I 9 m /I 9 u /I 9 ug/I u /I 9 ug/I m /1 9 m /1 9 SSA NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE 1* NE 1 10 1 NE 700 NE 4* NE NE 700 NE 2 NE NE 250 NE 10 NE 1* NE 1 Sample ID Sample Field Parameters Analytical Results Collection Date ASH PORE WATER ABMW-01 06/25/2015 Mixed (anoxic) 7.6 5.65 27 1009 0.32 -159 46 3.58 0.5 450 146 179 43 38 369 SIB 850 925 <1 <1 450 4530 4560 <1 <1 100 <10 16 <1 <1 5.55 6.09 0.0106 <0.001 ABMW-02(') 06/17/2015 Mixed (oxic-anoxic) 7.8 10.96 27 684 0.6 -187.1 17.9 2 <0.5 290 23 61 <1 <1 874 1020 149 173 1.22 1.42 290 8100 9200 <1 <1 82.2 <10 12 <1 <1 <1 <1 <0.001 <0.001 ABMW-03(') 06/17/2015 Anoxic 6.63 17.15 23 527 0.2 -136 69 2.13 3 80 18 119 <1 <1 197 193 200 200 <1 <1 80 1960 1940 <1 <1 54.5 <10 76 <1 <1 <1 <1 <0.001 <0.001 ABMW-04(1) 06/22/2015 Mixed (oxic-anoxic) 7.5 5.96 25.1 818 0.6 238 443 1.35 0.5 370 21 71 <1 <1 496 499 449 448 <1 <1 370 5040 4930 <1 <1 120 <10 11 <1 <1 1.43 1.49 <0.001 <0.001 DETECTIONS/SAMPLES --- --- --- --- --- --- --- --- --- --- 4/4 4/4 4/4 1/4 1/4 4/4 4/4 4/4 4/4 1/4 1/4 4/4 4/4 4/4 0/4 0/4 4/4 0/4 4/4 0/4 0/4 2/4 2/4 1/4 0/4 AVERAGE ASH PORE WATER CONCENTRATION (DETECTIONS --- --- --- --- --- --- --- --- --- --- 298 52 108 43 38 484 558 412 437 1.22 1.42 298 4,908 5,158 --- --- 89.2 --- 29 --- --- 3.49 3.79 0.0106 --- ONLY) MAXIMUM ASH PORE WATER GROUNDWATER CONCENTRATION --- --- --- --- --- --- --- --- --- 450 146 179 43 38 874 1,020 850 925 1.22 1.42 450 8,100 9,200 --- --- 120.0 --- 76 --- - 5.55 6.09 0.0106 NUMBER OF ASH PORE WATER SAMPLES EXCEEDING 15A NCAC 2L --- --- --- --- --- --- --- --- --- --- 0 0 0 0 1 0 4 0 1 0 0 0 0 4 0 0 0 0 0 0 0 0 2 0 0 STANDARD Notes: 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential mV = millivolts DIS = Dissolved NE = Not established TOT = Total NTU = nephelometric turbidity unit Temp = Temperature S.U. = Standard Unit DO = Dissolved Oxygen ug/I = microgram per liter Deg C = Degree Celsius umhos/cm = micro mhos per centimeter mg/I = milligrams per liter Spec Cord = Specific Conductance mg-N/L = miligram nitrogen per liter ft = feet --- = Not applicable < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. Note 1: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Prepared by: VTV/SRW Checked by: RLP P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Repo rting\Tables\Draft Tab les\Table 12-1 Ash Pore Water Risk Screen ing.xlsx page 1 of 2 TABLE 12-1 RISK SCREENING TABLE: COAL ASH PORE WATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate Potassium Selenium Sodium Strontium Thallium Total Total Total Vanadium Zinc Analytical Parameter Methane (as N) Sulfate Sulfide Dissolved Organic Suspended Solids Carbon Solids DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units ug/I ug/I ug/l ug/I mg/I ug/l ug/I 1 ug/I ug/l ug/I ug/I ug/I ug/I ug/I mg-N/L mg/I ug/I ug/I mg/I mg/I mg/l mg/I mg/l ug/I ug/l mg/I mg/I mg/l ug/I ug/l mg/I mg/l SSA NCAC 02L Standard NE 300 1 NE 15 NE NE 50 1 NE 1 1 1 NE NE NE I NE 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* 500 NE NE NE 0.3* NE 1 Sample ID Sample Analytical Results Collection Date ASH PORE WATER ABMW-01 06/25/2015 483 1370 <1 <1 51.9 2120 2280 <0.05 <0.05 <10 205 213 4.77 5.45 <0.01 24.6 <1 <1 18.7 3.36 3.49 5.8 <0.1 2.13 2.47 540 2.8 6 290 314 0.014 <0.005 ABMW-02('� 06/17/2015 172 356 <1 <1 27 957 1110 <0.05 <0.05 3100 1620 1830 <1 1.12 0.103 15.2 <1 <1 13.4 1.54 1.78 36 <0.1 <0.2 <0.2 450 11 <5 2.59 3.53 <0.005 <0.005 ABMW-03('� 06/17/2015 3870 3890 <1 <1 11.9 451 451 <0.05 <0.05 4400 75.1 75.6 3.16 2.69 0.016 10.2 <1 <1 10.8 1.17 1.17 42 <0.1 <0.2 0.289 350 4.1 9 <0.3 0.68 <0.005 <0.005 ABMW-04(') 06/22/2015 724 940 <1 <1 32.8 657 641 <0.05 <0.05 4600 434 428 1.12 1.71 <0.01 22.1 <1 <1 12.5 2.3 2.25 38 <0.1 <0.2 <0.2 520 2.9 <5 2.44 2.84 0.013 <0.005 DETECTIONS/SAMPLES 4/4 4/4 0/4 0/4 4/4 4/4 4/4 0/4 0/4 3/4 4/4 4/4 3/4 4/4 2/4 4/4 0/4 0/4 4/4 4/4 4/4 4/4 0/4 1/4 2/4 4/4 4/4 2/4 3/4 4/4 2/4 0/4 AVERAGE ASH PORE WATER CONCENTRATION (DETECTIONS 1,312 1,639 --- --- 30.9 1,046 1,121 --- --- 4,033 584 637 3.02 2.74 0.060 18.0 --- --- 13.9 2.09 2.17 30 --- 2.13 1.38 465 5.2 8 98.34 80.26 0.0135 --- ONLY) MAXIMUM ASH PORE WATER GROUNDWATER CONCENTRATION 3,870 3,890 --- --- 51.9 2,120 2,280 --- --- 4,600 1,620 1,830 4.77 5.45 0.103 24.6 --- --- 18.7 3.36 3.49 42 --- 2.13 2.47 540 11.0 9 290 314 0.014 NUMBER OF ASH PORE WATER SAMPLES EXCEEDING 15A NCAC 2L 0 4 0 0 0 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 0 0 0 4 0 0 STANDARD Notes: 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential mV = millivolts DIS = Dissolved NE = Not established TOT = Total NTU = nephelometric turbidity unit Temp = Temperature S.U. = Standard Unit DO = Dissolved Oxygen ug/I = microgram per liter Deg C = Degree Celsius umhos/cm = micro mhos per centimeter mg/I = milligrams per liter Spec Cond = Specific Conductance mg-N/L = miligram nitrogen per liter ft = feet --- = Not applicable < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. Note 1: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Prepared by: VTV/SRW Checked by: RLP P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Repo rting\Tables\Draft Tab les\Table 12-1 Ash Pore Water Risk Screen ing.xlsx page 2 of 2 TABLE 12-2 COAL ASH COPC DETERMINATION MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Constituent Coal Ash Conc. > EPA Soil RSL(') Coal Ash Pore Water 2Lnc. > NC Coal Ash COPC Basis For Coal Ash COPC Determination Aluminum Yes Not Established Yes Above soil RSL Antimony Yes Yes Yes Above soil RSL and groundwater 2L Arsenic Yes Yes Yes Above soil RSL and groundwater 2L Barium Yes Yes Yes Above soil RSL and groundwater 2L Beryllium No No No Below soil RSL and groundwater 2L Boron No Yes Yes Above groundwater 2L Cadmium No No No Below soil RSL and groundwater 2L Calcium Not Established Not Established No Note 3 Chloride Not Established No No Below groundwater 2L Chromium No No No Below soil RSL and groundwater 2L Cobalt Yes Yes Yes Above soil RSL and groundwater 2L Copper No No No Below soil RSL and groundwater 2L Iron No Yes Yes Above groundwater 2L Lead Yes No No Below groundwater 2L Magnesium Not Established Not Established No Note 3 Manganese No Yes Yes Above groundwater 2L Mercury No No No Below soil RSL and groundwater 2L Molybdenum No Not Established No Below soil RSL Nickel No No No Below soil RSL and groundwater 2L Nitrate (as N) Not Established No No Below groundwater 2L Potassium Not Established Not Established No Note 3 Selenium Yes No No Below groundwater 2L Sodium Not Established Not Established No Note 3 Strontium No Not Established No Below soil RSL Sulfate Not Established No No Below groundwater 2L Thallium Yes Yes Yes Above soil RSL and groundwater 2L TDS Not Established Yes Yes Above groundwater 2L Vanadium Yes Yes Yes Above soil RSL and groundwater 2L Zinc No INo I No lBelow soil RSL and groundwater 2L Prepared by: KDF Checked by: VTV/ 0 - Constituent is a coal ash COPC - Constituent is not a coal ash COPC Note 1: See Table 7-3 Note 2: See Tables 7-8 and 12-1 Note 3: Naturally occurring at moderate concentrations in most water bearing units, present at moderate concentrations in many foods and available in dietary supplements. Unlikely to pose potentially unacceptable risk to human health when compared to other coal ash constituents. TABLE 12-3 RISK SCREENING TABLE: BACKGROUND GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Redox Assignment PH Water Level Temp Spec Cond DO ORP Turbidity Ferrous Iron Alkalinity Aluminum Antimony Arsenic Barium Beryllium Bi- carbonate AlkalinityDIS Boron Cadmium Calcium Carbonate Alkalinity Chloride Chromium Cr(III)/Cr(VI) Cobalt Copper DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT Reporting Units None S.U. ft Deg C u/cros mg/l mV NTU mg/I mg/I ug/I ug/I ug/l ug/l ug/l ug/l ug/I ug/t ug/I ug/I mg/l ug/I ug/I ug/I ug/l mg/l mg/l mg/l ug/l ug/I ug/l ug/l mg/I mg/l 15A NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE 1* NE SO NE 700 NE 4* NE NE 700 NE 1 2 NE NE 250 NE 10 NE 1* NE 1 Sample ID Sample Collection Date Field Parameters Analytical Results SAPROLITE MW-12S 06/18/2015 Mixed (oxic-anoxic) 5.7 30.61 21 55 3.66 1 127 1 10.6 <0.5 14 <5 292 1 1 1 <1 I <1 I <1 23 24 <1 <1 14 <50 <50 <1 <1 2.36 <10 1 3.1 <1 1.61 1.02 1.09 <0.001 LLLLL TRANSITION ZONE BG-02 04/13/2015 NM 6.3 31.93 18 652 0.2 -11 7.09 NM 259 NA 136 NA <1 NA <1 NA 54 NA <1 259 NA <50 NA <1 57 <5 28 NA <5 NA <1 NA <0.005 BG-02 DUP 04/13/2015 NM 6.3 31.93 18 652 0.2 -11 7.09 NM 254 NA 215 NA <1 NA <1 NA 55 NA <1 254 NA <50 NA <1 58.1 <5 28 NA <5 NA <1 NA <0.005 BG-02i1i 07/07/2015 NM 6.5 31.53 19 623 0.3 -129 8.51 NM 225 NA 193 NA <1 NA <1 NA 54 NA <1 225 NA <50 NA <1 56.1 <5 30 NA <5 NA <1 NA <0.005 MW-12D(') 06/24/2015 Mixed (oxic-anoxic) 6.2 31.1 17 136 2.42 -1 4.02 0 53 <5 184 1.66 1.63 FT <1 23 26 <1 <1 53 <50 <50 <1 <1 12.6 <10 4 <1 <1 1.28 1.37 <0.001 <0.001 BEDROCK BG-01 04/13/2015 NM 5.5 30.16 17 154 1.2 296 8.9 NM 49.8 NA 392 NA <1 NA <1 NA 90 NA <1 49.8 NA <50 NA <1 12.5 <5 11 NA <5 NA <1 NA <0.005 BG-01 07/07/2015 NM 5.6 29.86 18 151 1.6 113 10 NM 48.3 NA 418 NA <1 NA <1 NA 97 NA <1 48.3 NA <50 NA <1 13.1 <5 11 NA <5 NA <1 NA <0.005 MW-10BR 03/17/2015 Anoxic 7.9 5.33 21 346 0.46 -145 8.89 1.5 110 13 641 <1 <1 <1 <1 25 27 <1 <1 110 <50 <50 <1 <1 36.8 <10 23 <1 1.3 <1 <1 <0.001 <0.001 MW-11BR 06/25/2015 Mixed(oxic-anoxic) 8.1 40.25 19 382 2.79 28 3.91 0 160 16 80 1.61 1.32 <1 <1 46 44 <1 <1 160 <50 <50 <1 <1 49.6 <10 16 1.59 1.73 <1 <1 0.00772 <0.001 MW-14BR 03/12/2015 Mixed (anoxic) 6.7 18.56 14 278 0.47 41 35 0.5 96 9 589 <1 <1 <1 <1 28 30 <1 <1 96 <50 <50 <1 <1 19.5 <10 9.3 <1 <1 1.41 1.41 <0.001 0.0045 Detections/Samples --- --- --- --- --- --- --- --- --- 3/10 SO/SO 2/10 2/10 0/10 0/10 5/10 10/10 0/10 0/10 SO/SO 0/10 0/10 0/10 0/10 10/10 0/10 10/10 1/10 3/10 3/10 3/10 1/10 1/10 Average Background Concentrations (Detections Only) --- --- --- --- --- --- --- --- --- 13 314 1.64 1.48 --- --- 29 50 --- --- 127 --- --- --- --- 31.8 --- 16 1.59 1.5 1.24 1.29 0.00772 0.0045 Maximum Concentration --- --- --- --- --- --- --- --- --- 16 641 1.66 1.63 --- --- 46 97 --- --- 259 --- --- --- --- 58.1 --- 30 1.59 1.73 1.41 1.41 0.00772 0.0045 Number of Backgroundwater Samples > 15A NCAC 2L Standard --- --- --- --- --- --- --- --- --- 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 ORP = Oxidation Reduction Potential mg/I = milligrams per liter ug/I = microgram per liter DIS = Dissolved mg-N/L = milligram nitrogen per liter umhos/cm = micro mhos per centimeter TOT = Total mV = millivolts Spec Cord = Specific Conductance Temp = Temperature NE = Not established NM = Not Measured DO = Dissolved Oxygen NTU = nephelometric turbidity unit ft = feet Deg C = Degree Celsius S.U. = Standard Unit --- = Not applicable NA = Not analyzed < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. Note 1: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Note 2: Hexavalent Chromium concentration is greater than EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). Prepared by: VTV Checked by: RLP P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-3 Background Wells GW Results.xlsx Page 1 of 2 TABLE 12-3 RISK SCREENING TABLE: BACKGROUND GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Iron Lead Magnesium Manganese Mercury Methane Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Tol Dissolved Solids tal oa Tot l Organic Carbon Total T oa Suspended Solids Vanadium Zinc DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS I TOT TOT DIS TOT DIS TOT DIS TOT DIS I TOT Reporting Units ug/l ug/l ug/l ug/l mg/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l mg-N/L mg/l ug/l ug/l mg/l mg/l mg/l mg/l mg/l ug/I ug/l mg/l mg/l mg/l ug/l ug/l mg/l mg/I ISA NCAC 02L Standard NE 300 NE 15 NE NE 50 NE 1 NE NE NE NE 1 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* Soo NE NE NE 0.3* NE 1 Sample ID Sample Collection Date Analytical Results SAPROLITE MW-12S 06/18/2015 <10 295 <1 <1 0.643 1 249 1 267 <0.05 <0.05 <10 I <1 I <1 1 1.35 1 1.45 1 1 1 1.86 1 <1 I <1 1 6.79 1 0.03 1 0.027 1 1.9 1 <0.1 1 <0.2 1 <0.2 1 50 1 0.68 1 <5 1 <0.3 1 0.403 1 0.056 1 0.067 TRANSITION ZONE BG-02 04/13/2015 NA 435 NA <1 11.8 NA ISO NA 0.06 NA NA I <1 NA <5 NA 3.27 NA <1 49.7 NA NA 4.8 NA NA <0.2 380 NA 8 NA NA NA 0.011 BG-02 DUP 04/13/2015 NA 546 NA <1 12.1 NA 155 NA 0.05 NA NA <1 NA <5 NA 3.3 NA <1 50.3 NA NA 4.7 NA NA <0.2 360 NA 7 NA NA NA 0.01 BG-02i1i 07/07/2015 NA 467 NA <1 12 NA 135 NA <0.05 NA NA <1 NA <5 <0.023 3.61 NA <1 48.2 NA NA 5.1 NA NA <0.2 370 NA 8 NA 5.88 NA 0.015 MW-12D(') 06/24/2015 95 326 <1 <1 3.44 674 683 <0.05 <0.05 <10 1.63 1.75 1.82 2.5 0.08 1.6 <1 <1 8.98 0.094 0.095 0.96 <0.1 <0.2 <0.2 120 0.396 <5 0.642 0.719 0.006 <0.005 BEDROCK BG-01 04/13/2015 NA 409 NA <1 3.35 NA 35 NA <0.05 NA NA <1 NA <5 NA 1.4 NA <1 12.4 NA NA 0.32 NA NA <0.2 130 NA 5 NA NA NA 0.029 BG-01 07/07/2015 NA S57 NA <1 3.63 NA 23 NA <0.05 NA NA <1 NA <5 0.64 1.5 NA <1 11.8 NA NA 0.32 NA NA <0.2 130 NA 5 NA 4.94 NA 0.05 MW-10BR 03/17/2015 286 883 <1 <1 15.5 954 894 <0.5 <0.05 <10 2.54 2.37 1.91 3.09 <0.01 8.66 <1 <1 37.9 0.21 0.21 83 <10 <0.2 <0.2 330 2 17 0.861 1.66 0,006 0.009 MW-11BR 06/25/2015 <10 115 <1 <1 11.1 73 67 <0.05 <0.05 <10 5.04 5.41 <1 <1 <0.01 5.03 <1 <1 14.3 0.225 0.2 14 <0.1 <0.2 0.323 250 1.1 <5 2.39 2.69 0.012 <0.005 MW-14BR 03/12/2015 485 907 <1 <1 2.96 543 544 <0.05 <0.05 <10 14.6 14 <1 <1 0.039 4.08 <1 <1 33 0.145 0.149 12 <1 <0.2 <0.2 190 1.3 14 0.758 1.29 0.008 0.01 Detections/Samples 3/10 1 10/10 0/10 0/10 10/10 S/10 10/10 0/10 2/10 0/10 4/10 4/10 3/10 3/10 4/10 10/10 0/10 0/10 10/10 S/10 5/10 10/10 0/10 0/10 1/10 10/10 5/10 7/10 4/10 7/10 5/10 8/10 Average Background Concentrations (Detections Only) 289 494 --- --- 7.65 499 295 --- 0.06 --- 5.95 5.88 1.69 2.35 0.44 3.4 --- --- 27.3 0.141 0.14 12.7 --- --- 0.323 231 1.1 9 1.16 2.51 0.018 0.025 Maximum Concentration 485 907 --- --- 15.5 954 894 --- 0.06 --- 14.6 14 1.91 3.09 1 8.66 --- --- 50.3 0.225 0.21 83 --- --- 0.323 380 2 17 2.39 5.88 0.056 0.067 Number of Backgroundwater Samples > 15A NCAC 2L Standard 0 8 0 0 0 0 8 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 1 0 0 0 0 7 0 0 Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 ORP = Oxidation Reduction Potential mg/I = milligrams per liter ug/I = microgram per liter DIS = Dissolved mg-N/L = milligram nitrogen per liter umhos/cm = micro mhos per centimeter TOT = Total mV = millivolts Spec Cord = Specific Conductance Temp = Temperature NE = Not established NM = Not Measured DO = Dissolved Oxygen NTU = nephelometric turbidity unit ft = feet Deg C = Degree Celsius S.U. = Standard Unit --- = Not applicable NA = Not analyzed < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. Note 1: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Note 2: Hexavalent Chromium concentration is greater than EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). Prepared by: VTV Checked by: RLP P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-3 Background Wells GW Results.xlsx Page 2 of 2 TABLE 12-4 RISK SCREENING TABLE: ALLUVIAL GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Water Spec Ferrous Aluminum Antimony Arsenic Barium Beryllium Bi- Boron Cadmium Calcium Carbonate Chromium Cobalt Copper Analytical Parameter Redox Assignment pH Temp DO ORP Eh Turbidity Alkalinity carbonate Chloride Cr(III)/Cr(VI) Level Cond Iron Alkalinity Alkalinity DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS I TOT DIS TOT Reporting Units None S.U. ft Deg C umhnos mg/l mV mV NTU mg/l mg/l ug/I ug/l ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/1 ug/I ug/I ug/I ug/I 1 mg/I mg/I mg/I ug/I ug/I ug/I ug/I mg/I mg/I SSA NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE I 1* NE 10 NE 700 NE 4* NE NE 700 NE 2 NE NE 250 NE SO NE 1* NE 1 Sample ID Sample Field Parameters Analytical Results Collection Date ALLUVIAL MW-03�'� 03/19/2015 Mixed (oxic-anoxic) 5.7 6.75 11 343 1.65 304 508.5 3.35 NM 61 <5 34 <1 <1 <1 <1 54 56 <1 <1 61 815 847 <1 <1 27.9 <10 47 <1 <1 <1 <1 <0.001 <0.001 MW-16S�'� 06/23/2015 Mixed (oxic-anoxic) 6.0 3.88 20 144 29.6 96 301.1 3.44 NM 43 <5 17 <1 <1 <1 <1 46 46 <1 <1 43 <50 <50 <1 <1 9.57 <10 13 <1 <1 4.35 4.32 0.00418 0.00102 DETECTIONS/SAMPLES --- --- --- --- --- --- --- --- --- --- 2/2 0/2 2/2 0/2 0/2 0/2 0/2 2/2 2/2 0/2 0/2 2/2 1/2 1/2 0/2 0/2 2/2 0/2 2/2 0/2 0/2 1/2 1/2 1/2 1/2 AVERAGE ALLUVIAL WATER CONCENTRATION (DETECTIONS --- --- --- --- --- --- --- --- --- --- 43 --- 26 --- --- --- --- 50 51 --- --- 52 815 847 --- --- 18.74 --- 30 --- --- 4.35 4.32 0.00418 0.00102 ONLY) MAXIMUM ALLUVIUM GROUNDWATER CONCENTRATION --- --- --- --- --- --- --- --- --- --- 43 --- 34 --- --- --- --- 54 56 --- --- 61 815 847 --- --- 27.90 --- 47 --- --- 4.35 4.32 0.00418 0.00102 NUMBER OF ALLUVIUM GROUNDWATER SAMPLES --- --- --- --- --- --- --- --- --- --- 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 EXCEEDING 2L Detections/Samples --- --- --- --- --- --- --- --- --- --- --- 3/5 10/10 2/5 2/10 0/5 0/10 5/5 10/10 0/5 0/10 10/10 0/5 0/10 0/5 0/10 10/10 0/10 10/10 1/5 3/10 3/5 3/10 1/5 1/10 Average Background Concentrations (Detections Only) --- --- --- --- --- --- --- --- --- --- --- 13 314 1.64 1.48 --- --- 29 50 --- --- 127 --- --- --- --- 31.8 --- 16 1.59 1.5 1.24 1.29 0.00772 0.0045 Maximum Concentration --- --- --- --- --- --- --- --- --- --- --- 16 641 1.66 1.63 --- --- 46 97 --- --- 259 --- --- --- --- 58.1 --- 30 1.59 1.73 1.41 1.41 0.00772 0.0045 Number of Backgroundwater --- --- --- --- --- --- --- --- --- --- --- 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 Samples > 15A NCAC 2L Standard Coal Ash COPC North Carolina groundwater 2L Alluvium groundwater conc. > 2L Alluvium Water COPC No Yes No Yes No Yes No Yes No No No No Yes No No No No No No No No Yes No No No Yes Yes Yes Yes Yes Yesz No No No Yes Yes No Yes No No No No No No No No No No Yes No No No No No No No No Yes No No Notes - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Appendix 2, April 1, 2013. vee - Indicates support/rationale for soil COPC attributable to coal ash. Note 1: If analytical method detection limit or concentration exceeds soil RSL 0 - Indicates constituent is not a soil COPC attributable to coal ash. Note 2: If no 15A NCNA 2L Standard ORP = Oxidation Reduction Potential DIS = Dissolved TOT = Total Temp = Temperature my = millivolts Note 3: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). NE = Not established Note 4: Hexavalent Chromium concentration is greater than EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). NTU = nephelometric turbidity unit S.U. = Standard Unit DO = Dissolved Oxygen ug/I = microgram per liter Deg C = Degree Celsius umhos/cm = micro siemens per centimeter mg/I = milligrams per liter Spec Cond = Specific Conductance mg-N/L = miligram nitrogen per liter ft = feet --- = Not applicable < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Appendix 1, April, 1, 2013. Prepared by: KDF Checked by: VTV P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-4 Alluvial GW Results.xlsx Page 1 of 2 TABLE 12-4 RISK SCREENING TABLE: ALLUVIAL GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate Potassium Selenium Sodium Strontium Thallium Total Total Total Vanadium Zinc Analytical Parameter Methane Sulfate Sulfide Dissolved Organic Suspended (as N) Solids Carbon Solids DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg-N/L mg/I ug/I ug/I mg/I mg/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I SSA NCAC 02L Standard NE 300 NE 15 NE NE 50 NE 1 NE NE NE NE 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* Soo NE NE NE 0.3* NE 1 Sample ID Sample Analytical Results Collection Date ALLUVIAL MW-03�'� 03/19/2015 <10 34 <1 <1 8.83 827 880 <0.05 <0.05 <10 <1 <1 2.06 2.22 0.07 1.84 <1 <1 22 0.331 0.336 21 <2 <0.2 <0.2 190 0.875 <5 <0.3 <0.3 <0.005 <0.005 MW-16S�'� 06/23/2015 470 860 <1 <1 4.01 276 260 <0.05 <0.05 <10 1.23 1.24 1.63 1.57 0.144 2.06 <1 <1 11.2 0.111 0.109 5.3 <0.1 <0.2 <0.2 100 0.508 <5 <0.3 0.303 0.065 0.039 DETECTIONS/SAMPLES 1/2 2/2 0/2 0/2 2/2 2/2 2/2 0/2 0/2 0/2 1/2 1/2 2/2 2/2 2/2 2/2 0/2 0/2 2/2 2/2 2/2 2/2 0/2 0/2 0/2 2/2 2/2 0/2 0/2 1/2 1/2 1/2 AVERAGE ALLUVIAL WATER CONCENTRATION (DETECTIONS 470 447 --- --- 6.42 552 570 --- --- --- 1.23 1.24 1.85 1.90 0.107 1.95 --- --- 16.6 0.221 0.223 13.2 --- --- --- 145 0.692 --- --- 0.303 0.065 0.039 ONLY) MAXIMUM ALLUVIUM GROUNDWATER CONCENTRATION 470 860 --- --- 8.83 827 880 --- --- --- 1.23 1.24 2.06 2.22 0.144 2.06 --- --- 22.0 0.331 0.336 21.0 --- --- --- 190 0.875 --- --- 0.303 0.065 0.039 NUMBER OF ALLUVIUM GROUNDWATER SAMPLES 0 1 0 0 0 L 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 EXCEEDING 2L - Detections/Samples 3/5 10/10 0/5 0/10 10/10 5/5 10/10 0/5 2/10 0/5 4/5 4/10 3/5 3/5 4/7 SO/SO 0/5 0/10 10/10 5/5 5/5 10/10 0/5 0/5 1/10 10/10 5/5 7/10 4/5 7/10 5/10 8/10 Average Background Concentrations (Detections Only) 289 494 --- --- 7.65 499 295 --- 0.06 --- 5.95 5.88 1.69 2.35 0.44 3.4 --- --- 27.3 0.141 0.14 12.7 --- --- 0.323 231 1.1 9 1.16 2.51 0.018 0.025 Maximum Concentration 485 907 --- --- 15.5 954 894 --- 0.06 --- 14.6 14 1.91 3.09 1 8.66 --- --- 50.3 0.225 0.21 83 --- --- 0.323 380 2 17 2.39 5.88 0.056 0.067 Number of Backgroundwater Samples that are Greater Than 0 8 0 0 0 0 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 7 0 0 NCAC 2L Coal Ash COPC North Carolina groundwater 2L Alluvium groundwater conc. > 2L Alluvium Water COPC Yes No No No No Yes No No No No No No No No No No No No No No No No No Yes Yes No No No Yes No No Yes Yes Yes Yes Yes 4No Yes Yes No No Yes No Yes No No No No Yes No No No No No No No No No No No No No No No No No No No No No No Yes No No Notes - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Appendix 2, April 1, 2013. v_ - Indicates support/rationale for soil COPC attributable to coal ash. Note 1: If analytical method detection limit or concentration exceeds soil RSL u - Indicates constituent is not a soil COPC attributable to coal ash. Note 2: If no 15A NCNA 2L Standard ORP = Oxidation Reduction Potential DIS = Dissolved TOT = Total Temp = Temperature mV = millivolts Note 3: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). NE = Not established Note 4: Hexavalent Chromium concentration is greater than EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). NTU = nephelometric turbidity unit S.U. = Standard Unit DO = Dissolved Oxygen ug/I = microgram per liter Deg C = Degree Celsius umhos/cm = micro siemens per centimeter mg/I = milligrams per liter Spec Cord = Specific Conductance mg-N/L = miligram nitrogen per liter ft = feet --- = Not applicable < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Appendix 1, April, 1, 2013. Prepared by: KDF Checked by: VTV P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-4 Alluvial GW Results.xlsx Page 2 of 2 TABLE 12-5 RISK SCREENING TABLE: SAPROLITE GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Water Spec Ferrous Aluminum Antimony Arsenic Barium Beryllium gi- Boron Cadmium Calcium Carbonate Chromium Cobalt Copper Iron Analytical Parameter Redox Assignment pH Temp DO ORP Eh Turbidity Alkalinity carbonate Chloride Cr(III)/Cr(VI) Level Cond Iron Alkalinity Alkalinity DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units None S.U. ft De C 9 umhos cm m /I 9 mV mV NTU m /I 9 m /I 9 ug/I ug/I u /I 9 ug/I u /I 9 u /I 9 u /I 9 u /I 9 u /I 9 u /I 9 m /I 9 ug/I ug/I u /1 9 u /I 9 m /I 9 m /I 9 m /I 9 u /I 9 u /I 9 u /I 9 u /I 9 m /I 9 m /I 9 ug/I u /I 9 15A NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE 1* NE SO NE 700 NE 4* NE NE 700 NE 2 NE NE 250 NE 10 NE 1* NE 1 NE 300 Sample ID Field Parameters Analytical Results ColleSamctiopnleDate SAPROLITE ABMW-03S"06/17/2015 Anoxic 5.2 17.26 23 137 0.2 8 213 4.96 2.5 51 9 30 <1 <1 1.17 1.04 23 25 <1 <1 51 1070 1100 <1 <1 4.78 <10 6.9 <1 <1 3.96 3.98 <0.001 <0.001 2490 2630 DETECTIONS/SAMPLES --- --- --- --- --- --- --- --- --- --- --- 1/1 1/1 0/1 0/1 1/1 1/1 1/1 1/1 0/1 0/1 1/1 1/1 1/1 0/1 0/1 1/1 0/1 1/1 0/1 0/1 1/1 1/1 0/1 0/1 1/1 1/1 AVERAGE SAPROLITE GROUNDWATER CONCENTRATION --- --- --- --- --- --- --- --- --- --- --- 9 30 --- --- 1.17 1.04 23 25 --- --- 51 1,070 1,100 --- --- 4.78 --- 6.9 --- --- 3.96 3.98 --- --- 2,490 2,630 (DETECTIONS ONLY) LITE MAXIMUM SAPATER GROUNDWATEONC ENTRATION CONCENTRATION ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ --- 9 30 --- --- 1.17 1.04 23 25 --- --- 51 1,070 1,100 --- --- 4.78 --- 6.9 --- --- 3.96 3.98 --- --- 2,490 2,630 NUMBER OF SAPROLITE GROUNDWATER SAMPLES --- --- --- --- --- --- --- --- --- --- --- 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 1 EXCEEDING Detections/Samples --- --- --- --- --- --- --- --- --- --- --- 1 3/5 10/10 2/5 2/10 0/5 0/10 5/5 10/10 0/5 0/10 10/10 0/5 0/10 0/5 0/10 10/10 0/10 10/10 1/5 3/10 3/5 3/10 1/5 1/10 3/5 10/10 Average Background Concentrations (Detections Only) ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ 13 314 1.64 1.48 --- --- 29 50 --- --- 127 --- --- --- --- 31.8 --- 16 1.59 1.5 1.24 1.29 0.00772 0.0045 289 494 Maximum Concentration --- --- --- --- --- --- --- --- --- --- --- 16 641 1.66 1.63 --- --- 46 97 --- --- 259 --- --- --- --- 58.1 --- 30 1.59 1.73 1.41 1.41 0.00772 0.0045 485 907 Number of Backgroundwater Samples > SSA NCAC 2L Standard --- --- --- --- --- --- --- --- --- --- --- 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 8 Coal Ash COPC 15A NCAC 2L Standard Saprolite Groundwater > 15A NCAC 2L Standard Saprolite Groundwater COPC Notes 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Appendix 2, April 1, 2013 -Indicates support/rationale for soil COPC attributable to coal ash. - Indicates constituent is not a soil COPC attributable to coal ash. ORP - Oxidation Reduction Potential DIS = Dissolved NE = Not established TOT = Total Temp = Temperature DO - Dissolved Oxygen Deg C = Degree Celsius mg/I - milligrams per liter mg-N/L = miligram nitrogen per liter --- = Not applicable < = concentration not detected at or above the reporting limit. NTU = nephelometric turbidity unit S.U. = Standard Unit ug/I - microgram per liter umhos/cm = micro mhos per centimeter Spec Cond = Specific Conductance ft = feet mV - millivolts * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Appendix 1, April, 1, 2013. No Yes No Yes No Yes No Yes No No No No Yes No No No No No No No No Yes No No No Yes No Yes Yes Yes Yes Yes Yes Yes' No No No Yes Yes Yes No Yes No No No No No No No No No No Yes No No No No No No No No Yes No No No Yes Note 1: If no 15A NCNA 2L Standard Note 2: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Prepared by: KDF Checked by: VTV P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-5 Saprolite GW Results.xlsx Page 1 of 2 TABLE 12-5 RISK SCREENING TABLE: SAPROLITE GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate Potassium Selenium Sodium Strontium Thallium Total Total Total Vanadium Zinc Analytical Parameter Methane Sulfate Sulfide Dissolved Organic Suspended (as N) Solids Carbon Solids DIS TOT TOT T DIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT IS TOT Reporting Units ug/I ug/I mg/I INE..' / ug/I ug/I ug/1 ug/I ug/I ug/I ug/I mg-N/L mg/I ug/I ug/I mg/I mg/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I ISA NCAC 02L Standard NE 1s NE NE 1 NE NE NE NE 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* 500 NE NE NE 0.3* NE 1 Sample ID Sample Analytical Results Collection Date SAPROLITE ABMW-03S") 1 06/17/2015 <1 <1 0.695 463 478 <0.05 <0.05 38 <1 <1 1.05 <1 <0.01 0.605 <1 <1 19.4 0.058 0.059 <0.1 <0.1 <0.2 <0.2 110 1 <5 <0.3 <0.3 0.008 0.007 DETECTIONS/SAMPLES 0/1 0/1 1/1 1/1 1/1 0/1 0/1 1/1 0/1 0/1 1/1 0/1 0/1 1/1 0/1 0/1 1/1 1/1 1/1 0/1 0/1 0/1 0/1 1/1 1/1 0/1 0/1 0/1 1/1 1/1 AVERAGE SAPROLITE GROUNDWATER CONCENTRATION --- --- 1 463 478 --- --- 38 --- --- 1.05 --- --- 0.605 --- --- 19.4 0.058 0.059 --- --- --- --- 110 1 --- --- --- 0 0 (DETECTIONS ONLY) MAXIMUM SAPROLITE GROUNDWATER CONCENTRATION --- --- 1 463 478 --- --- 38 --- --- 1.05 --- --- 0.605 --- --- 19.4 0.058 0.059 --- --- --- --- 110 1 NUMBER OF SAPROLITE GROUNDWATER SAMPLES 0 0 0 0L 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 U 0 0 0 0 0 0 0 0 EXCEEDING Detections/Samples 0/5 0/10 10/10 5/5 10/10 0/5 2/10 0/5 4/5 4/10 3/5 3/5 4/7 10/10 0/5 0/10 10/10 5/5 5/5 10/10 0/5 0/5 1/10 10/10 5/5 7/10 4/5 7/10 5/10 8/10 Average Background Concentrations (Detections Only) --- 7.65 499 295 --- 0.06 --- 5.95 5.88 1.69 2.35 0.44 3.4 --- --- 27.3 0.141 0.14 12.7 --- --- 0.323 231 1.1 9 1.16 2.51 0.018 0.025 Maximum Concentration --- --- 15.5 954 894 --- 0.06 --- 14.6 14 1.91 3.09 1 8.66 --- --- 50.3 0.225 0.21 83 --- --- 0.323 380 2 17 2.39 5.88 0.056 0.067 Number of Backgroundwater Samples > 15A NCAC 2L Standard 0 0 0 0 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 7 0 0 Coal Ash COP( 15A NCAC 2L Standarr Saprolite Groundwater > NCAC 21 Saprolite Groundwater COP( No No No Yes No No No No No No No No No No No No No No No No No Yes Yes No No No Yes No No Yes Yes Yes Yes dN Yes No No No No No No Yes No No No No No No No No No No No No No No No No No No No No No No I No I No No Prepared by: KDF Checked by: VTV Notes 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Appendix 2, April 1, 2013 0 -Indicates support/rationale for soil COPC attributable to coal ash. - Indicates constituent is not a soil COPC attributable to coal ash. ORP = Oxidation Reduction Potential DIS = Dissolved NE = Not established Note 1: If no 15A NCNA 2L Standard TOT = Total NTU = nephelometric turbidity unit Note 2: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., ]une 26. 2015). Temp = Temperature DO = Dissolved Oxygen Deg C = Degree Celsius mg/I = milligrams per liter S.U. = Standard Unit ug/I = microgram per liter umhos/cm = micro mhos per centimeter Spec Cord = Specific Conductance mg-N/L = miligram nitrogen per liter ft = feet --- = Not applicable mV = millivolts < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Appendix 1, April, 1, 2013. P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-5 Saprolite GW Results.xlsx Page 2 of 2 TABLE 12-6 RISK SCREENING TABLE: TRANSITION ZONE GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Water Spec Ferrous Aluminum Antimony Arsenic Barium Beryllium Bi Boron Cadmium Calcium Carbonate Chromium Cobalt Copper Analytical Parameter Redox Assignment pH Temp DO ORP Eh Turbidity Alkalinity carbonate Chloride Cr(III)/Cr(VI) Level Cond Iron Alkalinity Alkalinity DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT Reporting Units None S.U. ft Deg C hos/c mg/I mV mV NTUs mg/I mg/I ug/I ug/I ug/I ug/I ug/I ug/I uug/Iug/Img/I �ISTOT'DIS ug/I ug/I ug/Iug/I 15A NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE 1* NE 10 NE 4* NE NE 700 NE 2 NE NE 250 NE SO NE 1* NE 1 Sample ID Sample Field Parameters Analytical Results Collection Date TRANSITION ZONE ABMW-04D"l 06/22/2015 Mixed (oxic-anoxic) 6.6 6.04 24 1174 0.7 231 436 2.03 4.5 530 84 199 3.45 3.68 140 140 774 755 <1 <1 530 5130 5090 <1 <1 143 <10 11 <1 <1 6.41 6.71 <0.001 <0.001 CW-01 04/13/2015 NC 5.7 16.99 19 178 3.8 310 515 2.63 NM 37.6 NA 791 NA <1 NA <1 NA 6 NA <1 37.6 NA <50 NA 1.23 10.6 <5 19 NA <5 NA <1 NA <0.005 CW-01 07/08/2015 NC 5.5 17.65 20 182 3.3 187 392 3 NM 33.1 NA 35 NA <1 NA <1 NA <5 NA <1 33.1 NA <50 NA <1 10.9 <5 23 NA <5 NA <1 NA <0.005 CW-02 04/14/2015 NC 5 12.36 13 215 1.9 323 528 1.09 NM <5 NA 34 NA <1 NA <1 NA 97 NA <1 <5 NA 524 NA <1 12 <5 33 NA <5 NA <1 NA <0.005 CW-02131 07/07/2015 NC 5.1 13.33 16 285.6 0.8 214.4 419.4 0.46 NM <5 NA 16 NA <1 NA <1 NA 129 NA <1 <5 NA 804 NA <1 17.6 <5 54 NA <5 NA <1 NA <0.005 CW-03 04/14/2015 NC 6.4 15.6 16 654 2.5 352 557 2.31 NM 129 NA 63 NA <1 NA <1 NA 19 NA <1 129 NA <50 NA <1 64.2 <5 100 NA <5 NA <1 NA <0.005 CW-03 07/06/2015 NC 6.5 15.93 21 645 1 45.6 250.6 2.78 NM 136 NA 89 NA <1 NA <1 NA 19 NA <1 136 NA <50 NA <1 66.6 <5 100 NA <5 NA <1 NA <0.005 MW-07D 06/19/2015 Mixed (oxic-anoxic) 6.4 9.3 24 668 2.37 -7.7 197.3 12.1 0 180 <5 147 <1 <1 <1 <1 23 24 <1 <1 180 <50 <50 <1 <1 59.5 <10 78 <1 <1 <1 <1 <0.001 <0.001 MW-16D131 06/23/2015 Mixed (oxic-anoxic) 7.1 3.51 18.6 221 2.49 55.4 260.4 9.38 <0.5 76 <5 102 <1 <1 <1 <1 12 13 <1 <1 75 <50 <50 <1 <1 25.6 <10 8.8 <1 <1 <1 <1 <0.001 <0.001 MW-16D DUPl31 06/23/2015 Mixed (oxic-anoxic) 7.1 3.51 18.6 221 2.49 55.4 260.4 9.38 <0.5 76 <5 86 <1 <1 <1 <1 13 13 <1 <1 76 <50 <50 <1 <1 25.4 <10 8.9 <1 <1 <1 <1 <0.001 <0.001 DETECTIONS/SAMPLES --- --- --- --- --- --- --- --- --- --- 8/10 1/4 10/10 1/4 1/10 1/4 1/10 4/4 9/10 0/4 0/10 8/10 1/4 3/10 0/4 1/10 10/10 0/10 10/10 0/4 0/10 1/4 1/10 0/4 0/10 AVERAGE TRANSITION ZONE GROUNDWATER CONCENTRATION --- --- --- --- --- --- --- --- --- --- 149.7 84 156 3.45 3.68 140 140 206 119 --- --- 150 5,130 2,139 --- 1.23 43.5 --- 43.6 --- --- 6.41 6.71 --- --- (DETECTIONS ONLY) MAXIMUM TRANSITION ZONE GROUNDWATER CONCENTRATION ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ 530.0 84 791 3.45 3.68 140 140 774 755 --- --- 530 5,130 5,090 --- 1.23 143.0 --- 100.0 --- - 6.41 6.71 NUMBER OF TRANSITION ZONE WATER SAMPLES EXCEEDING --- --- --- --- --- --- --- --- 0 0 0 0 1 0 1 0 1 0 0 0 0 2 0 0 0 0 0 0 0 0 1 0 0 Detections/Samples --- --- --- --- --- --- --- --- --- --- --- 3/5 10/10 2/5 2/10 0/5 0/10 5/5 10/10 0/5 0/10 10/10 0/5 0/10 0/5 0/10 10/10 0/10 10/10 1/5 3/10 3/5 3/10 1/5 1/10 Average Background Concentrations (Detections Only) ___ ___ ___ ___ ___ ___ ___ ___ ___ 13 314 1.64 1.48 --- --- 29 50 --- --- 127 --- --- --- --- 31.8 --- 16 1.59 1.5 1.24 1.29 0.00772 0.0045 Maximum Concentration --- --- --- --- --- --- --- --- --- --- --- 16 641 1.66 1.63 --- --- 46 97 --- --- 259 --- --- --- --- 58.1 --- 30 1.59 1.73 1.41 1.41 0.00772 0.0045 Number of Backgroundwater Samples > SSA NCAC 2L Standard --- --- --- --- --- --- --- --- 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 Coal Ash COP( 15A NCAC 2L Standard Transition Zone Conc. > 15A NCAC 2L Standard Transition Zone COP( Notes 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L, Appendix 2, April 1, 2013. Yea I Indicates support/rationale for soil COPC attributable to coal ash _ - Indicates constituent is not a soil COPC attributable to coal ash. ORP = Oxidation Reduction Potential mV = millivolts DIS = Dissolved NE = Not established TOT = Total NTUs = nephelometric turbidity unit Temp = Temperature S.U. = Standard Unit DO = Dissolved Oxygen ug/I = microgram per liter Deg C = Degree Celsius umhos/cm = micro mhos per centimeter mg/I = milligrams per liter Spec Cord = Specific Conductance mg-N/L = miligram nitrogen per liter ft = feet --- = Not applicable NC = Not calculated < = concentration not detected at or above the reporting limit. - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L, Appendix 1, April, 1, 2013. Note 1: If no 15A NCAC 2L Standard No Yes No Yes No Yes No No No No Yes No No No No No No No No Yes No Yes Yes Yes gYesNo Yes Yes YesNo MNo No Yes No Yes No Yes No No No No Yes No No No No No No No No Yes No Note 2: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Note 3: Hexavalent Chromium concentration is greater than EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). Prepared by: KDF Checked by: VTV P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-6 Transition Zone GW Results.xlsx Page 1 of 2 TABLE 12-6 RISK SCREENING TABLE: TRANSITION ZONE GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Iron Lead Magnesium Manganese Mercury Methane Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Zinc TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units INE fl.' �DIS, g/ ug/I mg/1 ug/I ug/I ug/1 ug/I ug/1 ug/1 ug/I ug/I ug/I mg-N/L mg/I ug/1 ug/I mg/I mg/I mg/I mg/I mg/I ug/1 ug/I mg/I mg/I mg/I ug/I ug/I mg/1 mg/I 15A NCAC 02L Standard NE 15 NE NE 50 NE 1 NE NE NE NE 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* 500 NE NE NE 0.3* NE 1 Sample ID Sample Collection Date Analytical Results TRANSITION ZONE ABMW-04D"l 06/22/2015 30400 28300 <1 <1 45.1 4120 3640 <0.05 <0.05 21000 212 269 1.68 1.63 <0.01 34.9 <1 <1 22.9 2.99 3.07 19 <0.5 <0.2 <0.2 680 5.5 63 11.9 23.3 0.014 0.007 CW-01 04/13/2015 NA 608 NA <1 5.03 NA 27 NA <0.05 NA NA <1 NA <5 NA 1.13 NA <1 17.3 NA NA 10 NA NA <0.2 160 NA 11 NA NA NA 0.013 CW-01 07/08/2015 NA 31 NA <1 4.97 NA 6 NA <0.05 NA NA <1 NA <5 1.4 1.05 NA <1 17 NA NA 9.5 NA NA <0.2 150 NA <5 NA 0.543 NA 0.01 CW-02 04/14/2015 NA 17 NA <1 6.58 NA 170 NA <0.05 NA NA <1 NA <5 NA 1.61 NA <1 12.9 NA NA 39 NA NA <0.2 140 NA <5 NA NA NA <0.005 CW-02i31 07/07/2015 NA <10 NA <1 8.68 NA 393 NA <0.05 NA NA <1 NA <5 <0.023 1.97 NA <1 17.3 NA NA 49 NA NA <0.2 210 NA <5 NA <0.3 NA 0.008 CW-03 04/14/2015 NA 53 NA <1 8.28 NA 9 NA <0.05 NA NA <1 NA <5 NA 4.68 NA <1 46.1 NA NA 15 NA NA <0.2 440 NA <5 NA NA NA <0.005 CW-03 07/06/2015 NA 71 NA <1 8.35 NA <5 NA <0.05 NA NA <1 NA <5 0.32 4.76 NA <1 44.5 NA NA 15 NA NA <0.2 440 NA <5 NA 1.41 NA 0.11 MW-07D 06/19/2015 <10 69 <1 <1 26.4 176 188 <0.05 <0.05 <10 1.46 1.35 1.01 <1 <0.01 2.66 <1 <1 30.7 0.43 0.442 9 <0.1 <0.2 <0.2 390 1.2 <5 0.68 0.798 <0.005 <0.005 MW-16D(" 06/23/2015 <10 87 <1 <1 5.16 260 269 <0.05 <0.05 <10 10.9 10.1 <1 <1 2.9 2.32 <1 <1 9.77 0.163 0.163 7.7 <0.1 <0.2 <0.2 160 0.208 <5 0.53 0.617 0.009 <0.005 MW-16D DUPl31 06/23/2015 <10 85 <1 <1 5.1 250 261 <0.05 <0.05 <10 10.6 11.3 <1 <1 2.9 2.31 <1 <1 9.72 0.179 0.163 7.8 <0.1 <0.2 <0.2 150 0.214 <5 0.537 0.729 0.093 <0.005 DETECTIONS/SAMPLES 1/4 9/10 0/4 0/10 10/10 4/4 9/10 0/4 0/10 1/4 4/4 4/10 2/4 1/10 4/7 10/10 0/4 0/10 10/10 4/4 4/4 10/10 0/4 0/4 0/10 10/10 4/4 2/10 4/4 6/7 3/4 5/10 AVERAGE TRANSITION ZONE GROUNDWATER CONCENTRATION (DETECTIONS ONLY) 30,400 3,258 --- --- 12.37 1,202 551 --- --- 21,000 58.7 72.9 1 2 1.9 5.74 --- --- 22.8 0.94 0.960 18 --- --- --- 292 1.78 37 3.41 4.57 0.039 0.03 MAXIMUM TRANSITION ZONE GROUNDWATER CONCENTRATION 30,400 ' 28,300 --- --- 45.10 4,120 3,640 --- --- 21,000 212.0 269.0 2 2 2.9 34.90 --- --- 46.1 2.99 3.070 49 --- --- --- 680 5.50 63 11.90 23.30 0.093 0.11 NUMBER OF TRANSITION ZONE WATER SAMPLES EXCEEDING 0F�o 0 0 0 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 6 0 0 Detections/Samples 3/5 10/10 0/5 0/10 10/10 5/5 10/10 0/5 2/10 0/5 4/5 4/10 3/5 3/5 4/7 10/10 0/5 0/10 10/10 5/5 5/5 10/10 0/5 0/5 1/10 10/10 5/5 7/10 4/5 7/10 5/10 8/10 Average Background Concentrations (Detections Only) 289 494 --- --- 7.65 499 295 --- 0.06 --- 5.95 5.88 1.69 2.35 0.44 3.4 --- --- 27.3 0.141 0.14 12.7 --- --- 0.323 231 1.1 9 1.16 2.51 0.018 0.025 Maximum Concentration 485 907 --- --- 15.5 954 894 --- 0.06 --- 14.6 14 1.91 3.09 1 8.66 --- --- 50.3 0.225 0.21 83 --- --- 0.323 380 2 17 2.39 5.88 0.056 0.067 Number of Backgroundwater Samples > 15A NCAC 2L Standard 0 8 0 0 0 0 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 7 0 0 Coal Ash COPC 15A NCAC 2L Standarc Transition Zone Conc. > NCAC 21. Transition Zone COPC No Yes No No No No Yes No No No No No No No No No No No No No No No No No Yes Yes No No No Yes No No Yes Yes Yes Yes Yes Yes Yes No Yes Yes No Yes No No No No Yes No No No No No No No No No No No No No No No No No No Yes No No No Yes No I No Notes 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L, Appendix 2, April 1, 2013. Yea I Indicates support/rationale for soil COPC attributable to coal ash. _ - Indicates constituent is not a soil COPC attributable to coal ash. ORP = Oxidation Reduction Potential mV = millivolts DIS = Dissolved NE = Not established TOT = Total NTUs = nephelometric turbidity unit Temp = Temperature S.U. = Standard Unit DO = Dissolved Oxygen ug/I = microgram per liter Deg C = Degree Celsius umhos/cm = micro mhos per centimeter mg/I = milligrams per liter Spec Cond = Specific Conductance mg-N/L = miligram nitrogen per liter ft = feet --- = Not applicable NC = Not calculated < = concentration not detected at or above the reporting limit. - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L, Appendix 1, April, 1, 2013. Note 1: If no 15A NCAC 2L Standard Note 2: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Note 3: Hexavalent Chromium concentration is greater than EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). Prepared by: KDF Checked by: VTV P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-6 Transition Zone GW Results.xlsx Page 2 of 2 TABLE12-7 RISK SCREENING TABLE: BEDROCK GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Anal tical Parameter y Redox Assignment PH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Alkalinity Aluminum Antimony Arsenic Barium Beryllium Bi- carbonate Alkalinity Boron Cadmium Calcium Carbonate Alkalinity Chloride Chromium Cr(III)/Cr(VI) Cobalt Copper Iran DIS TOT DIS TOT DIS TOT DIS TOTDIS TOT DIS TOT TOT Z DIS TOT DIS TOT DIS TOT DIS TOT Units None S.U. ft Deg Ccros unnReporting mg/I mV mV NTU mg/I mg/I ug/Iug/Iug/Iug/Iug/I M ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I mg/1 mg/1 mg/I ug/I ug/I ug/I ug/I mg/I mg/I ug/I ug/I 15A NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE 1* NE 700 NE 4* NE NE 700 NE 2 NE NE 250 NE 10 NE 1* NE 1 NE 300 Sample ID SamCollection pleDate Field Parameters Analytical Results BEDROCK ABMW-02BR121 06/17/2015 Mixed (oxic-anoxic) 7.2 11.32 31 631 0.7 -57 147.7 3.28 <0.5 260 <5 64 <1 <1 <1 <1 154 159 <1 <1 260 <50 <50 <1 <1 81.5 <10 27 <1 <1 <1 <1 <0.001 <0.001 24 107 ABMW-04BR12l 06/23/2015 Mixed (oxic-anoxic) 7.4 5.95 26 552 0.5 -253 -48 5.03 0.5 190 11 20 <1 <3 <1 1.08 113 115 <1 <1 190 <50 <50 <1 <1 85.3 <10 4.8 <1 <1 <1 <1 <0.001 <0.001 1420 1590 CW-01D 04/13/2015 INC 6.9 18.43 20 355 1.2 298 503 2.06 NM 143 NA 14 NA <1 NA <1 NA <5 NA <1 143 NA <50 NA <1 46.8 <5 10 NA <5 NA <1 NA <0.005 NA 11 CW-01D 07/08/2015 NC 6.8 19.01 21 348 0.6 132 336.6 4.2 NM 140 NA 11 NA <1 NA <1 NA <5 NA <3 140 NA <50 NA <3 45.3 <5 10 NA <5 NA <1 NA <0.005 NA <10 CW-02D 04/14/2015 NC 6.2 12.71 16 360 3.8 342 547 4.98 NM 41.1 NA 206 NA <1 NA <1 NA 42 NA <1 41.1 NA 325 NA <1 32.7 <5 44 NA <5 NA <1 NA <0.005 NA 149 CW-02D131 07/07/2015 NC 6.1 13.76 18 359 2.9 162 367 9.8 NM 42 NA 472 NA <1 NA <1 NA 38 NA <1 42 NA 363 NA <1 36.6 <5 42 NA <5 NA <1 NA <0.005 NA 278 CW-04 04/14/2015 NC 5.9 21.38 16 164 2.7 314 519 1.85 NM 41 NA 76 NA <1 NA <1 NA 22 NA <1 41 NA <50 NA <1 10.9 <5 5.8 NA <5 NA <1 NA <0.005 NA 37 CW-04 07/06/2015 NC 5.9 21.64 18 162 3 305 310 2.76 NM 44.1 NA 200 NA <1 NA <1 NA 25 NA <1 44.1 NA 150 NA <1 11.6 <5 6.4 NA <5 NA <1 NA <0.005 NA 87 CW-05 04/14/2015 NC 6.6 3.95 15 415 0.8 61 266 7.62 NM 138 NA 163 NA <1 NA <1 NA 54 NA <1 138 NA <50 NA <1 46.1 <5 32 NA <5 NA 1 NA <0.005 NA 731 CW-05 07/06/2015 NC 6.7 6.38 22 434 0.3 -110 95.5 8.68 NM 148 NA 272 NA <1 NA <1 NA 57 NA <3 148 NA <50 NA <3 51.2 <5 35 NA <5 NA <1 NA <0.005 NA 1060 CW-05 07/08/2015 NC 6.6 10.35 20 640 4.2 93 298 3.35 NM NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CW-06 04/14/2015 NC 6.6 10.54 15 812 0.2 -127 78 6.33 NM 228 NA 55 NA <1 NA <1 NA 42 NA <3 228 NA <50 NA <1 93.8 <5 Si NA <5 NA <1 NA <0.005 NA 1370 CW-06 07/06/2015 NC 6.7 12.12 17 890 0.4 -188 17 1.72 <0.5 270 NA 57 NA <1 NA <i NA 48 NA <1 270 NA <50 NA <1 108 <5 89 NA <5 NA <1 NA <0.005 NA 2040 CW-06 CUP 07/06/2015 NC 6.7 12.12 17 890 0.4 -188 17 1.72 NM 268 NA 59 NA <1 NA <1 NA 49 NA <1 268 NA <50 NA <1 108 <5 89 NA <5 NA <1 NA <0.005 NA 2060 MW-03BR 03/14/2015 NC NM NM NM NM NM NM NM NM NM 200 NA 118 NA <1 NA <1 NA 46 NA <1 190 NA <50 NA <1 145 <10 160 NA <1 NA <1 NA <0.001 NA 648 MW-03BR 03/19/2015 Mixed (anoxic) 6.9 17.4 11 847 0.46 -19 185.6 5.84 NM NA <5 NA <1 NA <1 NA 45 NA <1 NA NA <50 NA <1 NA NA NA NA <1 NA <1 NA <0.001 NA 521 NA MW-04 03/20/2015 Oxic 6.3 28.28 9 291 5.42 242 446.7 10.3 0 88 33 118 <1 <1 <1 <1 5 6 <1 <1 88 <50 <50 <1 <1 28.4 <10 6.6 <1 <1 <1 <1 <0.001 0.00101 13 70 MW-05BR 03/11/2015 Anoxic 7.1 8.54 14 491 0.29 55 213.54 4.95 2.5 180 10 57 <1 <1 <1 <1 33 31 <1 <1 180 <50 <50 <1 <1 95.9 <10 62 <1 <1 <1 <1 <0.001 <0.001 3510 4240 MW-07BR 06/19/2015 Mixed (anoxic) 7.4 7.42 25 470 0.34 -200 4.7 4.09 <0.5 210 7 15 <I <I <1 <1 138 140 <1 <1 200 <50 <50 <1 <1 57.3 <10 15 <1 <1 <1 <1 <0.001 <0.001 223 339 MW-08BR 03/12/2015 Mixed (anoxic) 7.9 11.37 19 422 0.29 -156 213.57 8.57 3.25 170 <5 5310 <3 <1 <1 2.52 88 234 <1 <1 170 <50 <50 <1 <1 99.1 <10 120 <1 87.5 1.82 6.19 <0.001 0.0246 1490 9420 MW-08BR 06/18/2015 Anoxic 6.6 34.38 18 858 0.3 -149 55.7 4.33 2.5 200 7 110 <1 <1 <1 <1 65 66 <1 <1 200 150 <50 <1 <1 91.5 <10 120 <1 <1 <1 <1 <0.001 <0.001 2030 2200 MW-09BR 06/18/2015 Mixed (oxic-anoxic) 6.3 25.09 24 226 0.7 2 207.3 45.6 NM 72 11 3720 <1 <1 <1 <1 25 30 <3 <1 72 <50 <50 <1 <3 22.6 <10 16 <1 3.4 <1 <1 0.00229 0.00591 102 3000 MW-13BR12l 06/23/2015 Anoxic 7.2 31.28 21 580 0.4 -228 -23 2.22 1 210 27 37 <1 <1 <1 <1 41 40 <1 <1 210 <50 <50 <1 <1 75.2 <10 46 <1 <1 <1 1.19 <0.001 <0.001 1160 1130 MW-16BR1�I 06/23/2015 Oxic 8.7 3.75 25 239 0.89 -191 13.6 4.66 NM 97 22 88 <1 <1 2.07 2.05 9 11 <1 <1 96 <50 <50 <1 <1 22.5 <10 7 <1 <1 <1 11 <0.001 10.001 12 80 DETECTIONS/SAMPLES --- --- --- --- --- --- --- --- --- --- 22/22 8/11 22/22 0/11 0/22 1/11 3/22 11/11 20/22 0/11 0/22 22/22 0/11 2/22 0/11 0/22 22/22 0/22 22/22 0/11 2/22 1/11 2/22 1/11 3/22 12/28 21/22 AVERAGE BEDROCK WATER CONCENTRATION (DETECTIONS ONLY) --- --- --- --- --- --- --- --- --- --- 154 16 511 --- --- 2 1.88 65 63 --- --- 153 --- 344 --- --- 63.4 --- 47 --- 45.5 1.82 2.79 0.002 0.011 955 1,459 MAXIMUM BEDROCK WATER GROUNDWATER CONCENTRATION --- 2711 33 5,310 --- --- 2 2.52 1- 234 --- --- 270 --- 363 --- --- 145.0 --- 160 --- 87.5 1.82 6.19 0.002 0.025 3,110 9,420 NUMBER OF BEDROCK WATER SAMPLES EXCEEDING --- --- --- --- --- --- --- --- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I 0 2 0 0 0 13 Detections/Samples --- I--- --- --- --- --- --- --- --- --- ---1 3/5 1 10/10 1 2/5 1 2/10 1 0/5 1 0/10 1 5/5 1 10/10 1 0/5 1 0/10 1 10/10 1 0/5 1 0/10 1 0/5 1 0/10 1 30/10 1 0/10 1 10/10 1 1/5 1 3/10 1 3/5 1 3/10 1 1/5 1/10 3/5 1 10/10 Average Background Concentrations (Detections Only) --- --- --- --- --- --- --- 13 314 1.64 1.48 --- --- 29 50 --- --- 127 --- --- --- --- 31.8 --- 16 1.59 1.5 1.24 1.29 0.00772 0.0045 289 494 Maximum Concentration --- --- --- --- --- --- --- --- --- --- --- 16 641 1.66 1.63 --- --- 46 97 --- --- 259 --- --- --- --- 58.1 --- 30 1.59 1.73 1.41 1.41 0.00772 0.0045 485 907 Number of Backgroundwater Samples > 15A NCAC 2L Standard 0 O 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 O 0 8 Coal Ash COPC NCAC 2L Bedrock Groundwater Cone. > NCAC 2L Bedrock Groundwater COPC No Yes No Yes No Yes No Yes No No No No Yes No No No No No No No No Yes No No No Yes No Yes Yes Yes Yes Yes Yes Yesi No No No Noy Yes No Yes No No No No No No No No No No No No No No No No No No No Yes No No No Yes Prepared by: KDF Checked by: VTV Notes: Q Bold highlighted concentration indicates exceedance of the 15A NCAC 02L, Appendix 2, April 1, 2013. 0 - Indicates support/rationale for soil COPC attributable to coal ash. _ - Indicates constituent is not a soil COPC attributable to coal ash. Note 1: If no 15A NCAC 2L Standard ORP = Oxidation Reduction Potential mV = millivolts DIS = Dissolved ft = feet Note 2: Hexavalent chromium cone. < EPA screening value for tapwater (0.035 mg/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). TOT = Total NTU = nephelometric turbidity unit Temp = Temperature S.U. = Standard Unit Note 3: Hexavalent chromium cone. > EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). DO = Dissolved Oxygen ug/I = microgram per liter Deg C = Degree Celsius umhos/cm = micro mhos per centimeter NE = Not established mg/I = milligrams per liter Spec Cond = Specific Conductance NC = Not calculated mg-N/L = miligram nitrogen per liter NA = Not analyzed --- = Not applicable < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L, Appendix 1, April, 1, 2013. P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-7 Bedrock GW Results.xlsx Page 1 of 2 TABLE 12-7 RISK SCREENING TABLE: BEDROCK GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Lead Magnesium Manganese Mercury Methane Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Zinc DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg-N/L mg/I ug/I ug/I mg/I mg/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I 15A NCAC 02L Standard NE 15 NE NE 50 NE 1 NE NE NE NE 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* 500 NE NE NE 0.3- NE 1 Sample ID Sample Collection Date Analytical Results BEDROCK ABMW-02BRIcl 06/17/2015 <1 <1 13.2 146 149 <0.05 <0.05 <10 5.76 5.67 <1 <1 0.223 4.38 <1 <1 26 1.24 1.27 12 <0.1 <0.2 <0.2 370 0.949 <5 0.658 0.873 <0.005 <0.005 ABMW-04BRl2l 06/23/2015 <1 <1 5.97 410 407 <0.05 <0.05 <10 6.1 6.12 <1 <1 <0.01 6.23 <1 <1 21.2 2.02 2.02 60 <0.1 <0.2 <0.2 370 1.8 <5 <0.3 0.382 <0.005 <0.005 CW-01D 04/13/2015 NA <1 9.35 NA 6 NA <0.05 NA NA 21.7 NA <5 NA 1.99 NA <1 13.3 NA NA 5 NA NA <0.2 210 NA <5 NA NA NA <0.005 CW-01D 07/08/2015 NA <1 9.67 NA <5 NA <0.05 NA NA 20.8 NA <5 0.45 2.14 NA <1 12.8 NA NA 4.1 NA NA <0.2 200 NA <5 NA 1.09 NA <0.005 CW-02D 04/14/2015 NA <S 8.14 NA 123 NA <0.05 NA NA <1 NA <5 NA 2.82 NA <1 17.4 NA NA 50 NA NA <0.2 240 NA 14 NA NA NA 0.02 CW-02D1'I 07/07/2015 NA <1 8.39 NA 81 NA <0.05 NA NA <1 NA <5 <0.023 2.81 NA <1 17.6 NA NA 49 NA NA <0.2 250 NA 21 NA 0.585 NA 0.016 CW-04 04/14/2015 NA <1 3.05 NA <5 NA <0.05 NA NA <1 NA <5 NA 1.26 NA <1 15 NA NA 18 NA NA <0.2 150 NA <5 NA NA NA <0.005 CW-04 07/06/2015 NA <1 3.21 NA <5 NA <0.05 NA NA <1 NA <5 0.14 1.25 NA <1 15.5 NA NA 19 NA NA <0.2 160 NA <5 NA 1.02 NA <0.005 CW-05 04/14/2015 NA <1 7.33 NA 696 NA <0.05 NA NA 1.08 NA <5 NA 5.78 NA <1 18.2 NA NA 8.7 NA NA <0.2 270 NA <5 NA NA NA <0.005 CW-05 07/06/2015 NA <1 7.6 NA 785 NA <0.05 NA NA <1 NA <5 <0.023 5.88 NA <1 18 NA NA 7.5 NA NA <0.2 290 NA 6 NA <0.3 NA <0.005 CW-05 07/08/2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CW-06 04/14/2015 NA <1 19.1 NA 1300 NA <0.05 NA NA 8.17 NA <5 NA 10.2 NA 1.48 37.6 NA NA 41 NA NA <0.2 540 NA <5 NA NA NA <0.005 CW-06 07/06/2015 NA <1 19.8 NA 1450 NA <0.05 NA NA 6.86 NA <5 <0.023 13.2 NA <1 38.9 NA NA 47 NA NA <0.2 560 NA 5 NA <0.3 NA <0.005 CW-06 CUP 07/06/2015 NA <1 20.4 NA 1470 NA <0.05 NA NA 7.2 NA <5 <0.023 13.4 NA <1 39.7 NA NA 47 NA NA <0.2 570 NA <5 NA <0.3 NA <0.005 MW-03BR 03/14/2015 NA <1 11.5 NA 731 NA <0.05 <10 NA 1.39 NA <1 <0.01 7.76 NA <1 20.4 NA 0.417 9.4 <0.5 NA 10.2 660 1.8 <5 NA 0.781 NA <0.005 MW-03BR 03/19/2015 <1 NA NA 714 NA <0.05 NA NA 1.6 NA <1 NA NA NA <1 NA NA 0.403 NA NA NA <0.2 NA NA NA NA <0.3 NA <0.005 NA MW-04 03/20/2015 <1 <1 6.96 6 15 <0.05 <0.05 '10 2.3 2.38 <1 <1 0.295 5.48 <1 <1 17.8 0.098 0.099 34 <1 <0.2 <0.2 190 0.553 <5 0.596 0.891 0.008 0.009 MW-05BR 03/11/2015 <1 <1 6.91 1870 1740 <0.05 <0.05 11 3.81 4.27 <1 <1 <0.01 5.76 <1 <1 17.2 0.212 0.209 3.6 <0.1 <0.2 <0.2 380 2.2 12 <0.3 <0.3 <0.005 <0.005 MW-07BR 06/19/2015 <1 <1 12.1 263 263 <0.05 <0.05 <10 3.57 3.72 <1 <1 <0.01 4.92 <1 <1 18.2 0.986 0.988 1.6 0.112 <0.2 <0.2 270 1.9 <5 <0.3 <0.3 <0.005 <0.005 MW-08BR 03/12/2015 <1 11.7 26 3960 5040 <0.05 <0.05 <10 14.5 15 6.29 36.5 <0.01 6.6 <1 <1 39.6 0.405 0.459 39 <0.5 <0.2 <0.2 470 2.2 640 <0.3 12.3 0.04 0.137 MW-08BR 06/18/2015 <1 <1 23.1 2630 2680 <0.05 <0.05 <10 3.84 5.86 <1 1.42 0.016 5.43 <I <1 43.8 0.418 0.425 33 0.196 <0.2 <0.2 330 1.8 8 <0.3 <0.3 0.01 0.088 MW-09BR 06/18/2015 <1 <1 3.93 768 809 <0.05 <0.05 <10 2.44 1 1.75 1 1.01 1.43 0.086 3.09 <1 <1 13.3 0.108 0.109 8.9 <1 <0.2 <0.2 220 3.6 10 0.633 4.17 0.011 0.009 MW-13BRi2I 06/23/2015 <1 <1 13.1 486 474 <0.05 <0.05 <10 7.2 8.28 <1 <1 <0.01 5.49 <1 <1 25.7 0.423 0.418 18 0.115 <0.2 <0.2 370 0.9 5 <0.3 0.381 0.019 0.036 MW-16BRi�1 06/23/2015 cl <1 3.89 25 30 <0.05 <0.05 <10 21.8 23.4 <1 <1 <0.01 1.7 <3 <1 23.9 0.112 0.112 12 0.264 <0.2 <0.2 170 3.7 6 2.68 2.79 <0.005 <0.005 DETECTIONS/SAMPLES 0/11 1/22 22/22 11/11 19/22 11/11 0/22 1/10 11/11 17122 2/11 3/22 6/17 22/22 0/11 1/22 22/22 11/11 11/11 22/22 4/11 0/11 0/22 22/22 11/11 10/22 4/11 11/17 5/11 7/22 AVERAGE BEDROCK WATER CONCENTRATION (DETECTIONS ONLY) 11.7 11 1,025 960 --- --- 11 6.63 8.45 3.65 13.8 0.20 5.34 --- 1.48 23.2 0.584 0.593 24.9 0.172 --- --- 339 1.95 73 1.14 2.30 0.018 0.045 MAXIMUM BEDROCK WATER GROUNDWATER 117 26 3,960 5,040 --- --- 11 21.80 23.40 6.29 36.5 0.45 13.40 --- 1.48 43.8 2.020 2.020 80.0 0.264 --- --- 1 660 3.70 640 2.68 12.30 NUMBER OF BEDROCK WATER SAMPLES EXCEEDING 0 0 0 0 16 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 05 T0.040O.137CONCENTRATION Detections/Samples 0/5 0/10 10/10 1 5/5 30/10 1 0/5 2/10 1 0/5 1 4/5 1 4/10 1 3/5 1 3/5 1 4/7 1 10/10 0/5 0/10 1 10/10 1 5/5 1 5/5 1 10/10 1 0/5 0/5 1 1/10 1 10/10 1 5/5 1 7/10 1 4/5 1 7/10 5/30 8/10 Average Background Concentrations ___ --- 7.65 499 295 --- 0.06 --- 5.95 5.88 1.69 2.35 0.44 3.4 --- --- 27.3 0.141 0.14 12.7 --- --- 0.323 231 1.1 9 1.16 2.51 0.018 0.025 (Detections Only) Maximum Concentration --- --- 15.5 954 894 --- 0.06 --- 14.6 14 1.91 3.09 1 8.66 --- --- 50.3 0.225 0.21 83 --- --- 0.323 380 2 17 2.39 5.88 0.0.6 0.067 Number of Backgroundwater Samples > 15A 0 0 0 0 8 0 0 0 0 0 0 0 0 0 0 0 0 0 D 0 D 0 1 0 D 0 0 7 0 0 NCAC 2L Standard Coal Ash COPC .CAC 2L Bedrock Groundwater Conc. > NCAC 2L Bedrock Groundwater COPC No No No No Yes No No No No No No No No No No No No No No No No No Yes Yes No No 11 No Yes No No Yes Yes Yes 1 1Yes Yes No Yes I I I I Yes No No No No Yes No No No No No No No No No No No No No No No No No No Yes I No I No I No I Yes No No Notes: Q Bold highlighted concentration indicates exceedance of the 15A NCAC 02L, Appendix 2, April 1, 2013. 0 - Indicates support/rationale for soil COPC attributable to coal ash. - Indicates constituent is not a soil COPC attributable to coal ash. Note 1: If no 15A NCAC 2L Standard ORP = Oxidation Reduction Potential my = millivolts DIS = Dissolved ft = feet TOT = Total NTU = nephelometric turbidity unit Temp = Temperature S.U. = Standard Unit DO = Dissolved Oxygen ug/I = microgram per liter Deg C = Degree Celsius umhos/cm = micro mhos per centimeter mg/I = milligrams per liter Spec Cond = Specific Conductance mg-N/L = miligram nitrogen per liter NA = Not analyzed < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L, Appendix 1, April, 1, 2013. Note 2: Hexavalent chromium conc. < EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Note 3: Hexavalent chromium conc. > EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). NE = Not established NC = Not calculated --- = Not applicable Prepared by: KDF Checked by: VTV P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-7 Bedrock GW Results.xlsx Page 2 of 2 TABLE 12-8 SOILS (0-2') ANALYTICAL RESULTS WITH SCREENING CRITERIA - RESIDENTIAL AND INDUSTRIAL SOILS - HUMAN HEALTH HUMAN HEALTH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Percent Moisture pH at 25 DegreesC Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium(III)/ Chromium(VI) Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate It N) Potassium Selenium Sodium Strontium Sulfate Thallium Total Organic Carbon Vanadium Zinc Reporting Units % S.U. mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg EPA Industrial Health NE NE 110000 47 3 22000 230 23000 98 NE NE NE 35 4700 82000 800 NE 2600 4 580 2200 NE NE 580 NE 70000 NE 1.2 NE 580 35000 EPA Residential Health NE NE 7700 3.1 0.68 1500 16 1600 7.1 NE NE NE 2.3 310 5500 400 NE ISO 0.94 39 ISO NE NE 39 NE 4700 NE 0.078 NE 39 2300 Sample ID Sample Collection Date Analytical Results ABMW-01 (1-1.5) 06/02/2015 40.8 10.4 6960 <4.3 16.6 150 2.1 27.4 <0.52 2070 <213 25 7.6 j 37.9 2240 13 561 18.4 <0.0068 <2.2 14.3 <21.3 1010 <4.3 <217 71.8 <213 <4.3 85100 39.3 18.8 MW-03BR (0.8-1.2) 02/05/2015 16.8 5 7030 <1.5 <1.5 57.6 0.34 j <1.5 <0.18 332 <150 11.3 5.4 6.3 8480 3.3 2500 327 0.013 <3 5.1 <15 1070 <1.5 <29.8 5.4 <150 <1.5 3470 16 25.3 MW-07BR (1-2) 04/23/2015 2.8 5.6 3080 <2.6 <2.6 21.5 0.29 <6.4 <0.31 68.5 j <129 4.1 <2.6 7 7320 5.4 437 27.7 0.0073 j <1.3 0.68 j <12.9 315 <2.6 <128 2 j <129 <2 420 j 12.8 7 MW-08BR (0.75-1.25) 02/11/2015 19.5 6 14500 <1.6 <1.6 147 0.82 <31.7 <0.19 1120 <154 62.2 21.3 34.7 24700 8.9 10500 1230 <0.0048 <6.3 29.4 <15.4 6590 <1.6 <634 13.2 <154 <1.6 <300 50.6 88.9 MW-IOBR (0.75-1.0) 02/23/2015 15.2 6.3 7640 <0.57 1.4 81.8 0.4 13.6 j 0.11 1210 NA 41.9 12.4 28.9 18600 9.8 5590 527 0.0053 j <0.28 16.3 NA 2660 1.4 93.4 9.4 NA <0.57 721 35.1 61.3 MW-11BR (0-2) 04/14/2015 31.6 5.2 19700 <3.7 <3.7 43.1 <0.19 <9.4 <0.45 1690 <177 22.6 6.4 j 59.1 52900 6.1 j 1590 52.6 0.13 <1.9 1.4 j <17.7 <188 <3.7 <188 18.6 <177 <3.7 2950 208 17.2 MW-12D (1-2) 04/26/2015 17.5 4.9 1 11000 <3 3.6 j 19.6 1 <0.15 27.4 <0.36 <74.8 I <151 43.6 <3 12.4 1 31200 6.8 1 139 j 22.1 0.036 <1.5 0.83 j <15.1 182 j <3 <150 <1.5 <151 <3 1110 61 5.2 j MW-13BR (0-2) 04/12/2015 26.2 4.9 15500 <3.3 <3.3 72.9 0.33 <8.1 <0.39 38.1 167 6.1 <3.3 10.9 19600 6.2 j 1840 82.8 0.029 0.42 j 0.53 <16.7 1360 <3.3 <32.6 1.8 <167 <3(- 1210 32.4 25.4 MW-15BR (0.5-1) 05/09/2015 19.4 5.2 8440 <3.1 <3.1 64.6 0.24 j <7.7 <0.37 451 <153 10.4 3.9 j 12.5 15600 4.7 j 3760 108 0.0056 j <1.5 1.jj <15.3 1370 <3.1 <155 11.2 <153 <3, 1820 27.1 MW-16BR (1-2) 04/25/2015 24.9 5.1 5360 <3.2 <3.2 95.4 0.4 <8.1 <0.39 253 <166 7.6 6j 4.3 7710 6.3 j 454 1250 0.012 <1.6 1<16.6 254j <3.2 <162 3.2 j <166 <3i 3350 17.3 SB-01 (1-2) 03/04/2015 30.6 6.3 7030 <0.7 1.2 j 49.6 0.24 9.6 <0.084 655 <181 15.7 3.7 8.8 12400 9.6 1670 104 0.033 <0.35 2<18.1 881 <0.7 35.4 j 6 <181 <0.7 9060 28.3 SB-02 (0.5-2) 03/03/2015 35.5 5.3 10200 <0.8 1.9 65.7 0.52 16.3 j 0.13 j 227 <196 12.9 6.4 22.8 18300 7.5 2420 365 0.02 <0.4 1<19.6 2020 1.3 j <39.9 4.3 <196 <0.8 3750 44.8 M SB-05 (1-2) 03/04/2015 26.5 6 5320 <0.68 1.8 47.1 0.36 <8.5 0.12 j 313 <173 <0.85 2.8 11.1 8280 5.4 1940 406 <0.0054 <1.7 <0 <17.3 1730 1.9 <170 4.2 <173 <0.68 502j 6.8 SB-06 (1-2) 03/04/2015 20.3 5.9 2510 <0.63 1.2 j 54.8 0.17 2.9 j <0.075 <16.1 <154 0.74 2.5 13.1 3920 4.2 816 192 <0.0046 <0.32 0.<15.4 801 0.9 j 67.2 4.1 <154 <0.63 <377 2.7 SB-07 (1-2) OS/07/2015 13 5.1 9000 <2.9 <2.9 68.8 0.46 <7.3 <0.35 301 <143 11.4 5.9 7.7 9460 5.4 j 1110 693 0.037 <1.5 4<14.3 534 <2.9 <145 5.7 <143 1610 17.6 Total Soil Constituents Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate Potassium Selenium Sodium Strontium Sulfate Thallium Organic Vanadium Zinc (as N) Carbon Detected Above Industrial Soil Screening Levels 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Detection Limit > Industrial Soil Screening Level o 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 Detected Above Residential Soil Screening Levels 7 1 0 6 0 0 1 0 0 0 0 0 12 0 13 0 0 8 0 0 0 1 0 0 0 0 0 0 0 5 0 Detection Limit > Residential Soil Screening Level 0 4 8 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 0 0 0 Coal Ash COPC Soil RSL Exceed Soil RSL Soil COPC potentially attributable to coal ash Yes Yes Yes Yes No Yes No No No No Yes No Ves No No yes No No No No No No No No No Ves No Ves No Yes Yes Yes Yes Yes yes Ves Ves Ves yes Yes No Yes No No Yes Yes yes No yes Yes Yes' Yes No No No NO No NO No Yes No yes No No Ves No No No No NO No NO No NO Yes' No Ves No Prepared by: KDF Checked by: VTV Notes Bold color highlighted concentrations indicate highest exceedance of the EPA Mid -Atlantic Risk Assessment regional screening levels (RSLs) for soil, June 26, 2015, for the category listed below: ©- Concentration > Than Soil RSL - Residential- ®- Concentration > Than Soil RSL - Industrial -Use Scenario Note 1: If analytical method detection limit > soil RSL - Detection limit > Than Residential Soil RSL - Detection limit > Than Industrial Soil RSL - Indicates support/rationale for sediment COPC potentially attributable to coal ash. - Indicates constituent is not a sediment COPC potentially attributable to coal ash. S.U. = Standard Units mg/kg = milligram per kilogram % = percent DUP = Duplicate < = concentration not detected at or above the reporting limit. j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-8 Soil Analytical Results- Industrial and Residential.xlsx Page 1 of 1 TABLE 12-9 SEDIMENT ANALYTICAL RESULTS WITH SCREENING CRITERIA - RESIDENTIAL AND INDUSTRIAL SOILS - HUMAN HEALTH HUMAN HEALTH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Percent Moisture pH at 25 Degrees C Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium(III)/ Chromium(VI) Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Thallium Total Organic Carbon Vanadium Zinc Reporting Units % S.U. mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg EPA Industrial Health NE NE 110000 47 3 22000 230 23000 98 NE NE NE 35 4700 82000 Soo NE 2600 4 580 2200 NE NE 580 NE 70000 NE 1.2 NE 580 35000 EPA Residential Health NE NE 7700 3.1 0.68 1500 16 1600 7.1 NE NE NE 2.3 310 5500 400 NE 180 0.94 39 ISO NE NE 39 NE 4700 NE 0.078 NE 39 2300 Sample ID Sample Collection Date Analytical Results S-01 05/12/2015 65.5 6.4 1120 <7.2 56.4 271 <0.36 40.4 <0.86 1580 <353 5.8 <7.2 <1.8 247000 <7.2 664 511 <0.012 <3.6 <7.2 <35.3 <359 <7.2 <359 40.1 <353 <7.2 18400 <7.2 227 5-02 05/13/2015 26.9 6.5 3390 <3.4 <3.4 49.1 0.25j <8.5 <0.41 513 <170 8 16.4 7.8 16000 <3.4 1580 1060 <0.0056 <1.7 3.2 <17 687 <3.4 <170 6.8 <170 <3.4 1130 13.3 18.7 S-02B O5/13/2015 18.9 6.6 2170 <3.2 <3.2 31.8 0.21 j <7.9 <0.38 507 <156 3.4 4.7 j 4.8 12700 <3.2 1110 427 <0.0048 <1.6 0.96 j <15.6 471 <3.2 <158 5.3 <156 <3.2 1030 5.8 j 10.7 5-03 05/12/2015 19.5 7.1 5030 <3.2 <3.2 38.3 0.44 <8.1 <0.39 625 <157 94.4 7.4 5.4 15600 14 1140 562 <0.0049 <1.6 2.8 <15.7 342 <3.2 <162 10 <157 <3.2 1290 42.5 12.6 5-04 05/13/2015 57 6.9 6190 <6 14.1 164 0.33j 16.9j <0.72 2100 <293 15.4 14 12.3 101000 <6 3250 2400 <0.0092 <3 3.2 <29.3 1390 <6 <301 33.6 <293 <6 12900 22.3 26.6 5-06 05/13/2015 52.7 6.6 7500 <4.9 <4.9 80.9 0.37j <12.4 <0.59 2010 <258 18.5 7.4j 15.9 17400 8j 3090 436 0.0096j <2.5 7.4 <25.8 1230 <4.9 <247 15.5 <258 <4.9 23500 33.6 174 5-08 05/13/2015 43.5 6.8 2900 <4.4 <4.4 179 0.7 <10.9 <0.52 1280 <218 4.5 40.6 4.9 10700 4.9 j 656 7090 0.01 j <2.2 4.8 <21.8 310 j <4.4 <218 29.2 <218 <4.4 3510 7.3 j 12.8 SW-CB1 05/13/2015 30.2 6.3 6760 <3.6 13.6 53.1 0.38 <8.9 <0.43 763 1175 13.1 4.5j 10.4 jjjj�L 3.6j 3070 186 0.0065j <1.8 5.2 <17.5 1590 <3.6 <178 10.3 <175 <3.6 3770 16.5 39.6 SW-CB2 05/13/2015 56.5 7.0 7350 <5.5 <5.5 98.2 0.29j <13.8 <0.66 1060 <283 13.9 6.1j 9.5 11.400 7.4j 2170 383 0.027 <2.8 5 <28.3 952 <5.5 <277 16.3 399j <5.5 24800 19.2 31.4 SW-REF1 05/13/2015 26.2 6.4 2610 <3.6 <3.6 23.7 0.18j <8.9 <0.43 335 <167 17.3 <3.6 3.3 7100 3.7i 937 122 <0.0051 <1.8 2.4 <16.7 470 <3.6 1178 3.21 <167 <3.6 5210 15.1 14.8 Nitrate Total Soil Constituents Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel potassium Selenium Sodium Strontium Sulfate Thallium Organic Vanadium Zinc (as N) Carbon Detected Above Industrial Soil Screening Levels 0 0 2 0 0 0 0 0 0 0 1 0 2 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 Detection Limit > Industrial Soil Screening Level 0 0 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SO 0 0 0 Detected Above Residential Soil Screening Levels 0 0 2 0 0 0 0 0 0 0 8 0 10 0 0 9 0 0 0 0 0 0 0 0 0 0 0 1 0 Detection Limit > Residential Soil Screening Level 0 10 8 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 Coal Ash COPC Soil RSL Sediment Sample > Soil RSL Sediment COPC Yes Yes Yes Yes No Yes No No No No Yes No Yes No No Yes No No No No No No No No No Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No MNo No Yes No No Yes Yes Yes No Yes Yes' Yes No No No No No No No Yes No Yes No No Yes No No No No No No No No No Yes' No Yes No Prepared by: KDF Checked by: VTV Notes Bold color highlighted concentrations indicate highest exceedance of the EPA Mid -Atlantic Risk Assessment regional screening levels (RSLs) for soil, June 26, 2015, for the category listed below: Concentration > Than Soil RSL- Residential Health Q Concentration > Than Soil RSL - Industrial Health Note 1: If analytical method detection limit > soil RSL L�Q Detection limit > Than Residential Soil RSL Detection limit > Than Industrial Soil RSL - Indicates support/rationale for sediment COPC potentially attributable to coal ash. Ni -Indicates constituent is not a sediment COPC potentially attributable to coal ash. S.U. = Standard Units mg/kg = milligram per kilogram < = concentration not detected at or above the reporting limit. j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-9 Sediment Analytical Results- Industrial and Residential.xlsx Page 1 of 1 TABLE 12-10 SURFACE WATER ANALYTICAL RESULTS WITH SCREENING CRITERIA - EPA RECOMMENDED WATER QUALITY CRITERIA AND 15A NCAC 2B HUMAN HEALTH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Aluminum Antimony Arsenic Barium Beryllium Bi- Boron Cadmium Calcium Carbonate Chromium Cobalt Copper Iron Analytical Parameter Redox Assignment pH Temp Spec Cond DO ORP Turbidity Alkalinity carbonate Chloride Cr(III)/Cr(VI) Alkalinity Alkalinity DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units Unknown S.U. Deg C umhos/cm mg/I mV NTU mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I ug/I ug/I mg/I mg/I ug/I ug/I 15A NCAC 02B Standard NE NE NE NE NE 25 NE NE NE NE NE NE 30 NE NE NE NE NE NE NE NE NE NE NE 250 NE NE NE NE NE NE NE NE EPA Human Health NE NE NE NE NE NE NE NE NE 6500 NE 5.6 NE 0.018 NE 1000�NE NE NE NE NE NE 7t NE NE NE NE NE NE NE 3 NE 1.3 NE NE Sample ID Sample Field Parameters Analytical Results Collection Date SW-CB1 05/13/2015 Mixed (oxic-anoxic) 6.2 15 1 329 1 4.2 1 162 14.8 47 1 9 1 96.5 1 1 1 1 1 1 1 11 1 85 1 101 1 11 1 1 1 47 1140 1150 <1 1 1 1 25.5 1 10 1 58 1 1 1 1.25 1 3.05 1 4.2 1 0.001 1 0.00165 1 1600 1 4320 SW-CB2 05/13/2015 Mixed (oxic-anoxic) 6.6 22 276 0.68 -62 27.4 63 38 148 <1 <1 <1 1.06 84 89 <1 <1 63 448 455 <1 <1 16.9 <10 26 1 <1 I <1 1 2.71 2.73 <0.001 I <0.001 2130 4160 SW-REF1 05/13/2015 Mixed (oxic-anoxic) 6.7 18 117 2.58 119 16 41 23 111 <1 <1 <1 <1 31 34 <1 <1 41 <50 <50 <1 <1 8.24 <10 6 1 1 1 1 1 1 1 <1 1 0.00117 1 <0.001 1 785 2660 Human Health Screening Level Aluminum AntimonyArsenic Barium Beryllium y Bi- Boron Cadmium Calcium Carbonate Chromium Cobalt Copper Iron COPCs -- carbonate Alkalinity Chloride Cr(III)/Cr(VI) Alkalinity DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Detected Above EPA Human Health Surface Water Screening --- --- --- --- --- --- --- --- 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 Levels Detection Limit > EPA Human Health Surface Water Screening --- --- :tl --- 0 0 0 0 0 2 0 0 0 I 0 0 0 0 0 0 0 0 I 0 0 0 0 0 0 0 0 0 Level Detected Above NC 15A NCAC 02B Surface Water Screening Levels --- --- --- --- --- --- --- --- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Detection Limit > NC 15A NCAC 02B Surface Water Screening Level --- --- --- --- --- --- --- --- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Coal Ash COPC Screening Criteria Surface water conc. > Screening Criteria Surface Water COP( No Yes No Yes No Yes No Yes No No No No Yes No No No No No No No No Yes No No No Yes Yes Yes Yes Yes No Yes No No No Yes' No Yes2 Yes Yes2 No No No No No Yes No No No No No No Yes No No No No No No No No Yes No No No Yes Prepared by: KDF Checked by: VTV Notes; - Bold highlighted concentration indicates greater than the EPA National Recommended Water Quality Criteria, Human Health (consumption of water and fish), June 2015. - Detection Limit greater than the EPA National Recommended Water Quality Criteria, Human Health (consumption of water and fish), June 2015. - Bold highlighted concentration indicates greater than the 15A NCAC 02B, May 15, 2013. C- Detection Limit greater than the 15A NCAC 02B, May 15, 2013. Note 1: If analytical method detection limit or concentration is greater than surface water criteria ves _ Indicates support/rationale for surface water COPC attributable to coal ash. Note 2: If no surface water criteria Mo - Indicates constituent is not a surface water COPC attribu Spec Cond = Specific Conductance Deg C = Degree Celsius ug/I = microgram per liter S.U. = Standard Unit Temp = Temperature mg/I = milligrams per liter umhos/cm = micro mhos per centimeter mV = millivolts NTU = nephelometric turbidity unit NE = Not established < = concentration not detected at or above the reporting limit. j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentraion is estimated. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-10 Surface Water Analytical Results.xlsx Page 1 of 2 TABLE 12-10 SURFACE WATER ANALYTICAL RESULTS WITH SCREENING CRITERIA - EPA RECOMMENDED WATER QUALITY CRITERIA AND 15A NCAC 2B HUMAN HEALTH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate Potassium Selenium Sodium Strontium Thallium Total Total Total Vanadium Zinc Analytical Parameter Methane Sulfate Sulfide Dissolved Organic Suspended (as N) Solids Carbon Solids DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg-N/L mg/I ug/I ug/I mg/I mg/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I mg/I mg/I 15A NCAC 02B Standard NE NE NE NE NE NE NE NE NE NE 25 10 NE NE NE NE NE NE 250 NE NE NE 500 NE NE NE NE NE NE EPA Human Health NE NE NE NE NE NE NE NE 160 NE 610 NE NE NE 170 NE NE 14 NE NE NE 0.24 250 NE NE NE NE NE 7.4 Sample ID Sample Analytical Results Collection Date SW-CB1 05/13/2015 <1 <1 9.98 2100 2350 0.00595 120 <1 11 <1 1.52 0.625 2.09 <1 I <1 1 23.1 1 0.411 1 0.425 1 30 1 1 <0.2 <0.2 1 220 1 2.8 1 49 1 0.3 1 1.83 1 0.012 1 0.013 SW-CB2 05/13/2015 <1 <1 6.57 8240 8330 0.0033 250 <1 <1 <1 <1 0.052 2.25 <1 I <1 1 13.7 1 0.213 0.217 5 1 <0.1 1 <0.2 <0.2 1 170 1 7.8 1 30 0.397 1 0.811 1 0.008 <0.005 SW-REF1 05/13/2015 <1 <1 3.6 315 338 0.002 35 <1 <1 <1 <1 0.058 1.68 <1 I <1 1 8.84 1 0.073 0.074 1.8 1 <0.1 1 <0.2 <0.2 1 120 1 4.5 1 5 0.451 1 1.09 1 0.016 0.007 Human Health Screening Level Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate Potassium Selenium Sodium Strontium Thallium Total Total Total Vanadium Zinc COPCS Methane (as N) Sulfate Sulfide Dissolved Organic Suspended Solids Carbon Solids DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Detected Above EPA Human Health Surface Water Screening Levels 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Detection Limit > EPA Human Health Surface Water Screening Level 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Detected Above NC 15A NCAC 026 Surface Water Screening Levels 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Detection Limit > NC 15A NCAC 02B Surface Water Screening Level 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Coal Ash COPC NCAC 2B Surface water conc. > NCAC 213 Surface Water COPC No No No No Yes No No No No No No No No No No No No No No No No Yes Yes No No No Yes No No No Yes Yes No Yes2 No No Yes2 No No No No Yes No No No No No No No No No No No No No No No No No No No No No Yes No No Notes; - Bold highlighted concentration indicates greater than the EPA National Recommended Water Quality Criteria (consumption of water and fish), Human Health, June 2015. - Detection Limit greater than the EPA National Recommended Water Quality Criteria (consumption of water and fish), Human Health, June 2015. - Bold highlighted concentration indicates greater than the 15A NCAC 02B, May 15, 2013 C - Detection Limit greater than the 15A NCAC 02B, May 15, 2013. res _ Indicates support/rationale for surface water COPC attributable to coal ash. Mo - Indicates constituent is not a surface water Spec Cond = Specific Conductance Deg C = Degree Celsius ug/I = microgram per liter S.U. = Standard Unit Temp = Temperature mg/I = milligrams per liter umhos/cm = micro mhos per centimeter mV = millivolts NTU = nephelometric turbidity unit NE = Not established < = concentration not detected at or above the reporting limit. j = indicates concentration reported below PQL but above MDL and therefore concentraion is estimated. Note 1: If analytical method detection limit or concentration is greater than surface water criteria Note 2: If no surface water criteria Prepared by: KDF Checked by: VTV P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-10 Surface Water Analytical Results.xlsx Page 2 of 2 TABLE 12-11 SEEP ANALYTICAL RESULTS WITH SCREENING CRITERIA - EPA RECOMMENDED WATER QUALITY CRITERIA AND 15A NCAC 2B HUMAN HEALTH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Redox Assignment pH Temp Spec Cond DO ORP Turbidity Alkalinity Aluminum Antimony Arsenic Barium Beryllium Bi- carbonate Alkalinity Boron Cadmium Calcium Carbonate Alkalinity Chloride Chromium Cr(III)/Cr(VI) Cobalt Copper DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS I TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT Reporting Units Unknown S.U. Deg C u1cm mg/I mV NTU mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I mg/I mg/I mg/l ug/I ug/I ug/I ug/I mg/I mg/I 15A NCAC 02B Standard NE NE NE NE NE 25 NE NE NE NE NE NE 10 NE NE NE NE NE NE NE NE NE NE NE 250 NE NE NE NE NE NE EPA Human Health NE NE NE NE NE NE NE NE NE 6500 NE 5.6 NE 0.018 NE 1000 NE NE NE NE NE NE NE NE NE NE NE NE NE 3 NE 1.3 Sample ID Sample Collection Date Field Parameters Analytical Results S-01 05/12/2015 Anoxic 6.2 16 381 0.17 -22 69.7 68 20 198 <1 <1 2.06 3.45 131 142 <1 <1 68 1560 1560 <1 <1 21.5 <10 54 <1 <1 7.88 8.05 <0.001 <0.001 S-02 05/12/2015 Mixed (oxic-anoxic) 5.9 16 419 4.71 174 1.47 39 6 12 <1 <1 <1 <1 125 130 <1 <1 39 1640 1650 <1 <1 29.8 <10 73 <1 <1 10.2 9.09 <0.001 <0.001 S-02B 05/13/2015 Mixed (oxic-anoxic) 6.0 15 443 4.49 95 14.8 36 7 36 <1 <1 <1 <1 130 135 <1 <1 36 1640 1640 <1 <1 30 <10 79 <1 <1 10.9 10.1 0.005 <0.001 S-02B DUP 05/13/2015 Mixed (oxic-anoxic) 6.0 15 443 4.49 95 14.8 36 6 24 <1 <1 <1 <1 130 133 <1 <1 36 1630 1630 <1 <1 30 <10 79 <1 <1 10.8 10.1 <0.001 <0.001 S-03 05/12/2015 Mixed (oxic-anoxic) 6.4 19 346 8.44 194 2.43 46 7 60 <1 <1 <1 <1 61 64 <1 <1 46 1240 1250 <1 <1 26.2 <10 58 <1 <1 1.82 1.75 <0.001 <0.001 S-04 05/13/2015 Mixed (oxic-anoxic) 6.3 16 397 4.86 55 101 58 10 34 <1 <1 <1 1.4 136 148 <1 <1 58 1300 1340 <1 <1 21.2 <10 49 <1 <1 8.75 8.23 <0.001 <0.001 S-06 05/13/2015 Mixed (oxic-anoxic) 6.9 20 177 2.63 95 45.2 59 73 1140 <1 <1 <1 <1 32 42 <1 <1 59 <50 <50 <1 <1 13.7 <10 9.6 <1 <1 <1 1.29 0.001 0.0012 S-08 05/13/2015 Mixed (oxic-anoxic) 6.3 16 479 7.13 154 66.8 13 16 2730 <1 <1 <1 <1 101 198 <1 <1 13 1880 1860 <1 <1 35.5 <10 94 <1 2.81 1.18 15.3 <0.001 0.0042 Human Health Screening Level Aluminum Antimony Arsenic Barium Beryllium Bi- Boron Cadmium Calcium Carbonate Chromium Cobalt Copper COPCs (DIS/TOT) (DIS/TOT) (DIS/TOT) (DIS/TOT) (DIS/TOT) carbonate (DIS/TOT) (DIS/TOT) (TOT) Alkalinity Chloride (DIS/TOT) (DIS/TOT) (DIS/TOT) Alkalinity Detected Above EPA Human Health Surface Water -- -- -- -- -- -- -- -- 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 0 0 Screening Levels Detection Limit > EPA Human Health Surface Water -- -- -- -- -- -- -- -- 0 0 0 0 0 6 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Screening Level Detected Above NC 15A NCAC 02B Surface Water Screening -- -- -- -- -- -- -- -- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Levels Detection Limit > NC 15A NCAC 02B Surface Water Screening -- -- -- -- -- -- -- -- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Level Coal Ash COPC Screening Criteria Surface water conc. > Screening Criteria Surface Water COPC No Yes No Yes No Yes No Yes No No No No Yes No No No No No No No No Yes No No Yes Yes Yes Yes No I Yes No No Yes I No Yes' Yes No No No No No Yes No No No No No No Yes I No No No No I No No No I No I Yes No No Prepared by: KDF Checked by: RKD Notes: - Bold highlighted concentration indicates > EPA National Recommended Water Quality Criteria, Human Health (consumption of water and fish), June 2015. - Detection Limit > Surface Water Screeening Level Note 1: If analytical method detection limit or concentration > surface water criteria - Bold highlighted concentration indicates > the 15A NCAC 02B, May 15, 2013. Note 2: If no surface water criteria - Detection Limit > 15A NCAC 02B, May 15, 2013. ves I- Indicates support/rationale for seep water COPC attributable to coal ash. No I Indicates constituent is not a seep water COPC attributable to coal ash. Spec Cond = Specific Conductance Deg C = Degree Celsius ug/1 = microgram per liter S.U. = Standard Unit Temp = Temperature mg/I = milligrams per liter umhos/cm = micro mhos per centimeter my = millivolts NTU = nephelometric turbidity unit NE = Not established DUP = Duplicate j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. < = concentration not detected at or above the reporting limit. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-11 Seep Analytical Results.xlsx Page 1 of 2 TABLE 12-11 SEEP ANALYTICAL RESULTS WITH SCREENING CRITERIA - EPA RECOMMENDED WATER QUALITY CRITERIA AND 15A NCAC 2B HUMAN HEALTH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Iron Lead Magnesium Manganese Mercury Methane Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Zinc DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units ug/l ug/l ug/I ug/l mg/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l mg-N/L mg/l ug/l ug/l mg/l mg/l mg/l mg/I mg/l ug/l ug/l mg/l mg/l mg/l ug/l ug/l mg/l mg/l SSA NCAC 02B Standard NE NE NE NE NE NE NE NE NE NE NE NE 25 10 NE NE NE NE NE NE 250 NE NE NE 500 NE NE NE NE NE NE EPA Human Health NE NE NE NE NE NE NE NE NE NE 160 NE 610 NE NE NE 170 NE NE 14 NE NE NE 0.24 250 NE NE NE NE NE 7.4 Sample ID Sample Collection Date Analytical Results S-01 05/12/2015 15100 22000 <1 <1 8.16 3360 3370 <0.0005 89 <1 <1 <1 1.21 0.018 1.63 <1 <1 35.7 0.34 0.346 39 <0.1 <0.2 <0.2 260 1.5 95 <0.3 0.45 0.006 0.016 S-02 05/12/2015 3000 3100 <1 <1 13.3 3400 3320 0.00118 12 <1 <1 1.76 1.98 0.042 2.52 <1 <1 20.8 0.557 0.558 33 <0.1 <0.2 <0.2 330 1.3 <5 <0.3 <0.3 0.012 0.011 S-02B 05/13/2015 3200 3590 <1 <1 13.6 3250 3280 0.00145 15 <1 <1 1.77 2.04 0.033 2.53 <1 <1 21 0.552 0.563 36 <0.1 <0.2 <0.2 280 1.2 6 <0.3 <0.3 0.013 0.01 S-02B DUP 05/13/2015 3150 3330 <1 <1 13.5 3250 3280 0,000685 15 <1 <1 1.82 1.68 0.035 2.53 <1 <1 21 0.552 0.559 35 <0.1 <0.2 <0.2 330 1.3 5 <0.3 <0.3 0.01 0.01 S-03 05/12/2015 213 381 <1 <1 10.2 1140 1170 0.00394 10 <1 <1 <1 <1 0.039 2.12 <1 <1 24 0.438 0.446 29 <0.5 <0.2 <0.2 240 2 9 <0.3 <0.3 0.007 <0.005 S-04 05/13/2015 7450 11400 <1 <1 7.95 3520 3620 <0.0005 38 <1 <1 <1 1.1 <0.01 1.65 <1 <1 34.6 0.301 0.313 35 <0.1 <0.2 <0.2 240 1.4 28 <0.3 <0.3 <0.005 0.007 S-06 05/13/2015 422 3170 1 <1 1 <1 4.99 616 6711 11.004 140 <1 <1 <1 <1 0.121 1.85 <1 <1 13 0.099 0.103 4.4 <0.5 <0.2 <0.2 140 4.2 65 0.588 2.75 0.016 0.009 S-08 OS/13/2015 64 6190 <1 2.95 17.5 657 2790 0.008 <10 <1 <1 <1 4.25 0.095 3.35 <1 <1 21 0.661 0.691 53 <0.5 <0.2 <0.2 410 2.7 420 <0.3 5.19 1 <0.005 0.024 Human Health Screening Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate Potassium Selenium Sodium Strontium Thallium Total Total Total Vanadium Level COPCs Iron(DIS/TOT) (DIS/TOT) (TOT) (DIS/TOT) (TOT) Methane (DIS/TOT) (DIS/TOT) (as N) (TOT) (DIS/TOT) (TOT) (DIS/TOT) Sulfate Sulfide (DIS/TOT) Dissolved Organic Suspended (DIS/TOT) Zinc (DIS/TOT) Solids Carbon Solids Detected Above EPA Human Health Surface Water 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 0 0 0 0 0 Screening Levels Detection Limit > EPA Human Health Surface Water 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Screening Level Detected Above NC 15A NCAC 02B Surface Water Screening 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Levels Detection Limit > NC 15A NCAC 02B Surface Water 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Screening Level Coal Ash COP( NCAC 213 Exceed NCAC 213 Surface Water COP( No Yes No No No No Yes No No No No No No No No No No No No No No No No Yes Yes No No No Yes No No No No Yes Yes No Yesz YesZ No Yes YesZ No Yes No No I No No Yes No No No No No No No No No No No No No No No No No Yes No No No Yes No No Preparea cy: Kur LnecKeo cy: KKU Notes: Yes No Bold highlighted concentration indicates > EPA National Recommended Water Quality Criteria, Human Health (consumption of water and fish), June 2015. Detection Limit > Surface Water Screeening Level Note 1: If analytical method detection limit or concentration > surface water criteria. Bold highlighted concentration indicates > the 15A NCAC 02B, May 15, 2013. Detection Limit > 15A NCAC 02B, May 15, 2013. Indicates support/rationale for seep water COPC attributable to coal ash. Indicates constituent is not a seep water COPC attributable to coal ash. Note 2: If no surface water criteria Spec Cord = Specific Conductance Deg C = Degree Celsius ug/1 = microgram per liter S.U. = Standard Unit Temp = Temperature mg/I = milligrams per liter umhos/cm = micro mhos per centimeter my = millivolts NTU = nephelometric turbidity unit NE = Not established DUP = Duplicate j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. < = concentration not detected at or above the reporting limit. P:\Duke Energy Progress.1026\10S. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-11 Seep Analytical Results.xlsx Page 2 of 2 TABLEI2-12 MATRIX FOR DETERMINATION OF CONSTITUENTS OF POTENTIAL CONCERN - HUMAN HEALTH MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO NC Analytical Parameter Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Total Chromium Cr(III)/Cr(VI) Hexavalent Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate as N) Potassium Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Medium/Basis for COPC Designation Ash Pore Water Concentration exceeds screening value ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Analytical detection limit exceeds screening value No screening value ✓ Alluvial Groundwater Concentration exceeds screening value ✓ ✓ ✓ ✓ ✓ ✓ Analytical detection limit exceeds screening value No screening value ✓ Saprolite Groundwater Concentration exceeds screening value ✓ ✓ ✓ ✓ Analytical detection limit exceeds screening value No screening value ✓ Transition Zone Groundwater Concentration exceeds screening value ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Analytical detection limit exceeds screening value No screening value ✓ Bedrock Groundwater Concentration exceeds screening value ✓ ✓ ✓ ✓ ✓ ✓ Analytical detection limit exceeds screening value No screening value ✓ Soil Concentration exceeds screening value ✓ ✓ NE ✓ ✓ ✓ NA ✓ Analytical detection limit exceeds screening value ✓ ✓ NE ✓ ✓ NA No screening value NE NA Sediment Concentration exceeds screening value ✓ NE ✓ ✓ ✓ NA ✓ Analytical detection limit exceeds screening value ✓ ✓ NE ✓ ✓ NA No screening value NE NA Surface Water Concentration exceeds screening value ✓ NE ✓ Analytical detection limit exceeds screening value ✓ NE No screening value ✓ NE ✓ ✓ ✓ Seep Water Concentration exceeds screening value ✓ NE ✓ ✓ Analytical detection limit exceeds screening value ✓ NE No screening value ✓ NE ✓ ✓ ✓ Prepared by: VTV Checked by: RKD Mote-. Coal ash COPC (See Table 12-2) Constituent determined to be a human health COPC potentially attributable to coal ash. Constituent not determined to be a human health COPC potentially attributable to coal ash. Hexavalent chromium (Cr+6) is a human health COPC but ash pore water data to date suggest that Cr+e in groundwater is not attributable to coal ash (7-10). NA = Not applicable NE = Not evaluated P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-12 MAYO Matrix for Determination of COPCs - HH.xlsx Page 1 of 1 TABLE 12-13 THREATENED AND ENDANGERED SPECIES PERSON COUNTY, NORTH CAROLINA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Species Protection Status Habitat Requirements Taxonomic Group Common Name Scientific Name State Federal (USFWS) Record Status Triangle Floater Alasmidonta undulata (syn.) T Current Roanoke, Chowan, Tar, Neuse, Cape Fear drainages Dwarf wedgemussel Alasmidonta heterodon E Obscure small streams less than five meters wide to large rivers more than 100 meters wide; it is four in a variety of substrate types including clay, sand, gravel and pebble, and sometimes in silt depositional areas near banks; and it usually inhabits hydrologically stable areas, including very shallow water along streambanks and under root mats Box Spike Elliptio cistellae ormis W3,W5 Current Neuse, Lumber, Pee Dee drainages; Lake Waccamaw Atlantic Pigtoe Fusconaia masoni (syn.) E FSC Current Roanoke, Tar, Neuse, Cape Fear, Yadkin --Pee Dee drainages Yellow Lampmussel Lampsilis cariosa (syn.) E FSC Current Chowan, Roanoke, Neuse, Tar, Cape Fear, Lumber, Yadkin --Pee Dee drainages m Eastern Lampmussel Lampsilis radiata (syn.) T Current Chowan, Roanoke, Tar, Neuse, Cape Fear, Yadkin --Pee Dee drainages Chameleon Lampmussel Lampsilis s .2 (syn.) SR Current Tar, Neuse, Cape Fear, and Yadkin Pee Dee drainages Green Floater Lasnu ona subviridis (syn.) E FSC Current Roanoke, Tar, Neuse and Yadkin --Pee Dee drainages; New and Watauga drainages Creeper Strophitus undulatus (syn.) T Current Roanoke, Tar, Neuse, Cape Fear, Yadkin --Pee Dee, Catawba, Broad, and French Broad drainages Notched Rainbow Villosa constricta (syn.) SC Current Roanoke, Tar, Neuse, Yadkin --Pee Dee, and Catawba drainages Crustaceans: Carolina Ladle Crayfish Cambarus davidi (syn.) SR Current Neuse and Cape Fear drainages (endemic to North Carolina) Insects: Sweetflag Spreadwing Lestes forcipatus W3 Current vegetated ponds m N A Thread Cedar Moss Cryphaea ravenelii W7 Historical on bark of trees c o � c Z ; e Flattened Entodon Entodon compressus (syn.) SR-P I- storical on moist calcareous rocks Carolina Birdfoot-trefoil Acmispon helleri (syn.) SC-V FSC Current open woods over clay soils, roadsides Piedmont Gerardia Agalinis decemloba Wl Current dry, open sites Thin -pod White Wild Indigo Baptisia albescens Wl Historical open woodlands, clearings Prairie Blue Wild Indigo Baptisia australis var. aberrans (syn.) E Historical glades and open forests on basic soils American Barberry Berberis canadensis (syn.) SC-V Historical open forests and glades on basic soils Limestone Meadow Sedge Carex granularis W7 Historical piedmont bottomlands, coastal plain marl forests Autumn Coral -root Corallorhiza odontorhiza Wl Historical forests Tall Larkspur Delphinium exaltatum (syn.) E FSC Current grassy balds, glades, woodlands, mostly over mafic rock Ringed Witch Grass Dichanthelium annulum (syn.) SR-P Historical dry sandy or rocky open woods and borders of thickets Leatherwood Dirca palustris Wl Current rich woods, either alluvial or over mafic or calcareous rocks Crested Woodfem Dryopteris cristata Wl Current bogs, wet woods Eastern Isopyrurn Enemion biternatum (syn.) SC-V Current rich bottomlands, levees, and lower slopes Eastern Wahoo Euonymus atropurpureus var. W7 Current levee forests and rich forests with circumneutral soils Tall Boneset Eupatorium altissimum Wl Current woodlands, openings, and old fields over mafic rocks Godfrey's Thoroughwort Eupatorium godfreyanum Wl Current 1woodlands, especially over mafic rocks Tall Boneset Eupatorium saltuense (syn.) SR-L Current upland forests, woodland borders Large Witch -alder Fothergilla major (syn.) SR-T Current dry ridgetop or bluff forests, seepage wetlands, and Piedmont longleaf pine forests Indian Physic Gillenia stipulata (syn.) T Current forests and open woods, mainly over mafic rocks Lewis's Heartleaf Hexastylis lewisii Wl Current mesic mixed hardwood forests, streamhead pocosin ecotones Virginia Quillwort Isoetes virginica (syn.) SR-L FSC Current upland depression swamp forests, clayey soils Nodding Rush Juncus secundus W7 Historical rock outcrops and glades y Earle's Blazing -star Liatris squarrulosa (syn.) SR-P Current diabase glades, open woods especially over mafic rocks; also loamy -sand soils in longleaf pi oak sandhills a Prarie birdsfoot-trefoil Lotus uni oliolatus var. helleri FSC Current a Yellow Carolina Milkvine Matelea avidula W3 I- storical habitat in North Carolina not known Virginia Bluebells Mertensia virginica W7 Current rich forests on slopes and bottomlands m Sweet Pinesap Monotropsis odorata (syn.) SC-V FSC I- storical dry forests and bluffs > Woodland Muhly Muhlenbergia sylvatica W7 I- storical rich alluvial forests Ginseng Panax quinquefolius Wl Current cove forests, other rich forests Glade Wild Quinine Parthenium auriculatum (syn.) SR-T Current glades and openings over mafic rocks Heller's Rabbit -Tobacco Pseudognaphalium helleri (syn.) SR-P Historical dry woodlands, openings, and glades, especially over mafic rocks Small Rabbit -Tobacco Pseudognaphalium micradenium (syn.) SR-T Current dry woodlands Torrey's Mountain -mint Pycnanthemum torreyi (syn.) SR-T FSC Historical dry upland forests and woodlands, over mafic rocks American Shinleaf Pyrola americana Wl Current forests Swamp White Oak Quercus bicolor Wl Current upland swamp forests Chinquapin Oak Quercus muehlenbergii Wl Current calcareous forsts and bluffs Pin Oak Quercus palustris Wl Current swamps Rock Buttercup Ranunculus micranthus (syn.) SR-P H storical rich woods on circumneuttal soil Four -angle Sabatia Sabatia quadrangula W7 Current moist to mesic grassy glades, woodland borders, powerline clearings, often with hardpan soi Tall Prairie Willow Salix humilis W6 I- storical balds, roadsides and ditches Veined Skullcap Scutellaria nervosa (syn.) E Current alluvial forests Showy Skullcap Scutellaria serrata Wl Current deciduous forests Prairie Dock Silphium terebinthinaceum (syn.) SR-P Current diabase glades, other open or semi -open sites over mafic rock Round -leaved Goldenrod Solidago patula var. strictula Wl Current seeps, pocosins, peaty places Southeastern Bold Goldenrod Solidago rigida var. glabrata (syn.) SR-P Current diabase glades, other open sites over mafic rock Rough Hedge -nettle Stachys aspera W7 Current moist or wet sandy soil of savannas, marshes, or swamp forests Skunk Cabbage Symplocarpus foetidus W6 Historical bogs American Basswood Tilia americana var. americana W7 Current rich cove forests Culver's-root Veronicastrum virginicum W7 Historical bogs, wet meadows, dry soils over mafic rocks Mole Salamander Ambystoma talpoideum (syn.) SC Current breeds in fish -free semipermanent woodland ponds; forages in adjacent woodlands Four -toed Salamander Hemidactylium scutatum (syn.) Sc Current pools, bogs, and other wetlands in hardwood forests Common Gray Treefrog Hyla versicolor (syn.) SR Current deciduous or mixed forests, often near water; primarily near VA border (some records not y entered) Neuse River Waterdog Necturus lewisi (syn.) SC FSC Current rivers and large streams in Neuse and Tar drainages (endemic to North Carolina) Grasshopper Sparrm Ammodramus savannarum W1,W5 Current pastures and other grasslands [breeding season onl Bald Eagle Haliaeetus leucocephalus BGEPA Current estuaries, large lakes, reservoirs, rivers, and some seacoasts, with a good food base, perchi areas, and nesting sites y Roanoke Bass Ambloplites cavif tons (syn.) SR FSC Current streams in Neuse and Tar systems Carolina Darter Etheostoma collis (syn.) SC FSC Current Roanoke, Tar, Neuse, Cape Fear, Yadkin --Pee Dee, and Catawba drainages a y > Fantail Darter Etheostoma flabellare W5 Current Cape Fear, Neuse, and Tar drainages populations have limited distribution; Pee Dee, Roano New, and French Broad populations stable Pinewoods Shiner Lythrurus matutinus W2 FSC Current Tar and Neuse drainages (endemic to North Carolina) Northern Long -Eared Bat Myotis septentrionalis PT Current hibernates during winter months in caves, mines or other similar structures typically with large passages and entrances, constant temperatures, and high humidity with no air currents for summer, intact interior forest habitat, with low edge -to -interior ratios, late -successional forest features include a high percentage of old trees, uneven forest structure (resulting in multilayered vertical structure), single and multiple tree -fall gaps, standing snags, and wood debris Mimic Shiner Notropis volucellus (syn.) SR Current New, French Broad, Little Tennessee, Tar, and Neuse drainages Animal Assemblage: Colonial Wading Bird Colony (syn.) Current m " Basic Mesic Forest (Piedmont Subtype) (syn.) Current Dry Basic Oak --Hickory Forest (syn. Current Z c v Dry Oak --Hickory Forest (Piedmont Subtype) (syn.) current F P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-13 T&E species summary Person County.xlsx Page 1 of 2 TABLE 12-13 THREATENED AND ENDANGERED SPECIES PERSON COUNTY, NORTH CAROLINA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Species Protection Status Habitat Requirements Taxonomic Group Common Name Scientific Name State Federal (USFWS) Record Status Dry-Mesic Basic Oak --Hickory Forest (Piedmont Subtype) (syn.) Current Dry-Mesic Oak --Hickory Forest (Piedmont Subtype) (syn. ) Current Flood lain Pool (syn.) Current Granitic Flatrock (Annual Herb Subtype) (syn.) Current Mesic Mixed Hardwood Forest (Piedmont Subtype) (syn. ) Current Mixed Moisture Hardpan Forest (syn.) Current Piedmont Acidic Glade (syn.) Current Piedmont Alluvial Forest (syn.) Current Piedmont Basic Glade (Typic Subtype) (syn-) Current Piedmont Boggy Streamhead (syn.) Current o Piedmont Bottomland Forest (High Subtype) (syn.) Current Piedmont Bottomland Forest (Northern 0 Low Subtype) (syn.) Current Piedmont Bottomland Forest (Typic Low ' Subtype) (syn.) Current Piedmont Headwater Stream Forest Current E(Hardpan Subtype) (syn.) Piedmont Levee Forest (Typic Subtype) (s .) Current Piedmont Monadnock Forest. (Typic z Subtype) (syn.) Current Piedmont Swamp Forest (syn.) Current Piedmont/Coastal Plain Heath Bluff (syn.) Current Rocky Bar and Shore (Alder-Yellowroot Subtype) (syn.) Current Rocky Bar and Shore (Water Willow Subtype) (syn.) Current Upland De ression Swamp Forest (syn.) Current Upland Pool (Typic Piedmont Subtype) (s) Current Xeric Hardpan Forest (Basic Rocky Subtype) (syn.) Current Xeric Hardpan Forest (Acidic Hardpan Subtype) (syn.) Current Xeric Hardpan Forest (Basic Hardpan Subtype) (syn.) Current http://portal.ncdenr.org/web/nhp/database-search US FWS Updated: 12-27-2012 https://www.fws.gov/raleigh/species/cntylist/person.html Definitions of Federal Status Codes: E = endangered. A taxon "in danger of extinction throughout all or a significant portion of its range." T = threatened. A taxon "likely to become endangered within the foreseeable future throughout all or a significant portion of its range." C = candidate. A taxon under consideration for official listing for which there is sufficient information to support listing. (Formerly "Cl" candidate species.) BGPA =Bald and Golden Eagle Protection Act. See below. FSC=Federal Species of Concern. FSC is an informal term. It is not defined in the federal Endangered Species Act. In North Carolina, the Asheville and Raleigh Field Offices of the US Fish and Wildlife Service (Service) define Federal Species of Concern as those species that appear to be in decline or otherwise in need of conservation and are under consideration for listing or for which there is insufficient information to support listing at this time.Subsumed under the term "FSC" are all species petitioned by outside parties and other selected focal species identified in Service strategic plans, State Wildlife Action Plans, or Natural Heritage Program Lists. T(S/A) = threatened due to similarity of appearance. A taxon that is threatened due to similarity of appearance with another listed species and is listed for its protection. Taxa listed as T(S/A) are not biologically endangered or threatened and are not subject to Section 7 consultation. See below. EXP = experimental population. A taxon listed as experimental (either essential or nonessential). Experimental, nonessential populations of endangered species (e.g., red wolf) are treated as threatened species on public land, for consultation purposes, and as species proposed for listinq on private land. P = proposed. Taxa proposed for official listing as endangered or threatened will be noted as "PE" or "PT", respectively. Bald and Golden Eagle Protection Act (BGPA): In the July 9, 2007 Federal Register( 72:37346-37372), the bald eagle was declared recovered, and removed (de -listed) from the Federal List of Threatened and Endangered wildlife. This delisting took effect August Threatened due to similarity of aooearance(T(S/All: In the November 4, 1997 Federal Register (55822-55825), the northern population of the bog turtle (from New York south to Maryland) was listed as T (threatened), and the southern population (from Virginia south to Georgia) was listed as T(S/A) (threatened due to similarity of appearance). The T(S/A) designation bans the collection and interstate and international commercial trade of bog turtles from the southern population. The T(S/A) designation has no effect on land management activities by private landowners in North Carolina, part of the southern population of the species. In addition to its official status as T(S/A), the U.S. Fish and Wildlife Service considers the southern population of the bog turtle as a Federal species of concern due to habitat loss. Current - the species has been observed in the county within the last 50 years. Historic - the species was last observed in the county more than 50 years ago. Obscure - the date and/or location of observation is uncertain. Incidental/migrant - the species was observed outside of its normal range or habitat. Probable/potential - the species is considered likely to occur in this county based on the proximity of known records (in adjacent counties), the presence of potentially suitable habitat, or both. Definition of State Codes: CODE/ STATUS DEFINITION Any native or once -native species of wild animal whose continued existence as a viable component of the State's fauna is determined by the Wildlife Resources Commission to be E=Endangered in jeopardy or any species of wild animal determined to be an 'endangered species' pursuant to the Endangered Species Act. (Article 25 of Chapter 113 of the General Statutes; 1987). T=Threatened Any native or once -native species of wild animal which is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range, or one that is designated as a threatened species pursuant to the Endangered Species Act. (Article 25 of Chapter 113 of the General Statutes; 1987). SC=Special Concern Any species of wild animal native or once -native to North Carolina which is determined by the Wildlife Resources Commission to require monitoring but which may be taken under regulations adopted under the provisions of this Article. (Article 25 of Chapter 113 of the General Statutes; 1987). SR=Significantly Rare Any species which has not been listed by the N.C. Wildlife Resources Commission as an Endangered, Threatened, or Special Concern species, but which exists in the state (or recently occurred in the state) in small numbers and has been determined by the N.C. Natural Heritage Proaram to need monitorina. Significantly Rare species include "peripheral" SR-G=Game Animal Species is a game animal or a forbearer, and therefore (by law) cannot be listed for State protection as E, T, or SC. SC-V=Special Concern -Vulnerable "Any species or higher taxon of plant which is likely to become a threatened species within the foreseeable future"(NCAC 02 NCAC 48F .0401). SC-H=Special Concern -Historical "Any species or higher taxon of plant that occurred in North Carolina at one time, but for which all known populations are currently considered to be either historical or extirpated." "(NCAC 02 NCAC 48F .0401). SR-L= Significantly Rare Limited The range of the species is limited to North Carolina and adjacent states (endemic or near endemic). These are species that may have 20-50 populations in North Carolina, but fewer than 100 populations rancewide. The preponderance of their distribution is in North Carolina and their fate depends laraely on conservation here. SR-T=Significantly Rare Throughout The species is rare throughout its range (fewer than 100 populations total). SR-D=Significantly Rare Disjunct The species is disjunct to North Carolina from a main range in a different part of the country or world. SR-P=Significantly Rare Peripheral The species is at the periphery of its range in North Carolina. These species are generally more common somewhere else in their ranges, occurring in North Carolina peripherally tc their main ranges, mostly in habitats which are unusual in North Carolina. SR-O=Significantly Rare Other The range of the species is sporadic or cannot be described by the other Significantly Rare categories W= Watch List Any other species believed to be rare and of conservation concern in the state but not warranting active monitoring at this time P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-13 T&E species summary Person County.xlsx Page 2 of 2 TABLE 12-14 SURFACE WATER AND SEEPS ANALYTICAL RESULTS EPA AND 1SA NCAC 2B RECOMMENDED WATER QUALITY CRITERIA FOR AQUATIC LIFE (ACUTE AND CHRONIC) MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Spec Aluminum Antimony Arsenic Barium Beryllium Bicarbonate Boron Cadmium` Calcium Carbonate Chromium** Cobalt Copper' Iron Analytical Parameter Redox Assignment pH Temp Cond DO ORP Eh Turbidity Alkalinity Alkalinity Alkalinity Chloride DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units None S.U. Deg C u/cros mg/I mV mV NTUs mg/I ug/l ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/l ug/I ug/I ug/I ug/l mg/I mg/I mg/I ug/l ug/l ug/I ug/I mg/I mg/I ug/I ug/I EPA R4 FW Chronic NE 6.5-9 NE NE NE NE NE NE NE NE 87 160 NE 190* NE NE NE 0.53 NE NE 750 NE 0.66 NE NE NE 230 11 11 NE NE 0.00654 NE 1000 NE EPA Aquatic Life Acute NE NE NE NE NE NE NE NE NE NE 750 NE NE 340 NE NE NE NE NE NE NE NE 2 NE NE NE 860 16 16 NE NE 1.3 NE NE NE EPA Aquatic Life Chronic NE 6.5-9 NE NE NE NE NE NE NE NE 87 NE NE 150 NE NE NE NE NE NE NE NE 0.25 NE NE NE 230 11 11 NE NE 1.3 NE 1000 NE NC2B_Aquatic Life -Acute NE 6-9 NE NE NE NE NE NE NE NE NE NE NE 340 NE NE NE 65 NE NE NE NE 0.82 NE NE NE NE NE NE NE NE 0.0036 NE NE NE NC 2B-Aquatic Life -Chronic NE 6-9 NE NE NE NE NE NE NE NE NE NE NE 150 NE NE NE 6.5 NE NE NE NE 0.15 NE NE NE NE NE NE NE NE 0.0027 NE NE NE Sample ID Sample Field Parameters Analytical Results Collection Date S-01 05/12/2015 Anoxic 6.2 16 381 0.17 -22 183 69.7 68 20 198 <1 <1 2.06 3.45 131 142 <1 <1 68 1560 1560 <1 <1 21.5 <10 54 <1 <1 7.88 8.05 <0.001 <0.001 15100 22000 S-02 05/12/2015 Mixed(oxic-anoxic) 5.9 16 419 4.71 174 379 1.47 39 6 12 <1 <1 <1 <1 125 130 <1 <1 39 1640 1650 <1 <1 29.8 <10 73 <1 <1 10.2 9.09 <0.001 <0.001 3000 3100 S-02B 05/13/2015 Mixed(oxic-anoxic) 6.0 15 443 4.49 95 300 14.8 36 7 36 <1 <1 <1 <1 130 135 <1 <1 36 1640 1640 <1 <1 30 <10 79 <1 <1 10.9 10.1 0.00502 <0.001 3200 3590 u c S-02B DUP 05/13/2015 Mixed(oxic-anoxic) 6.0 15 443 4.49 95 300 14.8 36 6 24 <1 <1 <1 <1 130 133 <1 <1 36 1630 1630 <1 <1 30 <10 79 <1 <1 10.8 10.1 <0.001 <0.001 3150 3330 V1 S-04 05/13/2015 Redox Assignment 6.3 16 397 4.86 55 260 SOS 58 10 34 <1 <1 <1 1.4 136 148 <1 <1 58 1300 1340 <1 <1 21.2 <10 49 <1 <1 8.75 8.23 1 <0.001 <0.001 7450 11400 S-05 05/12/2015 Oxic 7.9 27 443 2.48 218 423 4.38 28 18 109 <1 <1 2.47 2.72 63 68 <1 <1 28 1740 1790 <1 <1 38.1 <10 71 <1 <1 <1 <1 0.00169 0.00193 23 112 S-08 05/13/2015 Mixed (oxic-anoxic) 6.3 16 479 7.17 154 359 66.8 13 16 2730 <1 <1 <1 <1 101 198 <1 <1 13 1880 1860 <1 <1 35.5 <10 94 <1 2.81 1.18 15.3 <0.001 0.00422 64 6190 S-03 05/12/2015 Mixed(oxic-anoxic) 6.4 19 346 8.44 194 399 2.43 46 7 60 <1 <1 <1 <1 61 64 <1 <1 46 1240 1250 <1 <1 26.2 <10 58 <1 <1 1.82 1.75 <0.001 <0.001 213 381 o+ c S-06 05/13/2015 Mixed(oxic-anoxic) 6.9 20 177 2.63 95 300 45.2 59 73 �1140 <1 <1 <1 <1 32 42 <1 <1 59 <50 <50 <1 <1 13.7 <10 9.6 <1 <1 <1 1.29 0.00102 0.00121 422 3170 'y v SW-CB1 05/13/2015 Mixed (oxic-anoxic) 6.2 15 329 4.2 162 367 14.8 47 9 965 <1 <1 <1 <1 85 101 <1 <1 47 1140 1150 <1 <1 25.5 <10 58 <1 1.25 3.05 4.2 <0.001 0.00165 1600 4320 SW-CB2 05/13/2015 Mixed(oxic-anoxic) 6.6 22 276 0.68 -62 143 27.4 63 38 148 <1 <1 <1 1.06 84 89 <1 <1 63 448 455 <1 <1 16.9 <10 26 <1 <1 2.71 2.73 <0.001 <0.001 2130 4160 SW-REF1 05/13/2015 Mixed(oxic-anoxic) 6.7 18 117 2.58 119 323.5 16 41 23 111 <1 <1 <1 <1 31 34 <1 <1 41 <50 <50 <1 <1 8.24 <10 6 <1 <1 <1 <1 0.00117 <0.001 785 2660 Prepared by: KDF/SRW Checked by: MMS Notes: Bold color highlighted concentrations indicate highest exceedance of the category listed below: 0 - EPA Region 4 Surface Water Quality Criteria - Chronic, Nov 2001 - - EPA National Recommended Water Quality Criteria, Aquatic Life - Acute, June 2015 ® - EPA National Recommended Water Quality Criteria, Aquatic Life - Chronic, June 2015 0 - 15A NCAC 02B Criteria, Aquatic Life - Acute, January 2015 - 15A NCAC 02B Criteria, Aquatic Life - Chronic, January 2015 Temp = Temperature S.U. = Standard Unit 0 - EPA Region 4 Surface Water Quality Criteria - Chronic, Nov 2001 - MDL is greater than EPA National Recommended Water Quality Criteria, Aquatic Life - Acute, June 2015 0 - MDL is greater than EPA National Recommended Water Quality Criteria, Aquatic Life - Chronic, June 2015 0 - MDL is greater than 15A NCAC 02B Criteria, Aquatic Life - Acute, January 2015 0 - MDL is greater than 15A NCAC 02B Criteria, Aquatic Life - Chronic, January 2015 NTU = nephelometric turbidity unit Deg C = Degree Celsius ug/I = microgram per liter DO = Dissolved Oxygen mg/I = milligrams per liter umhos/cm = micro mhos per centimeter Spec Cond = Specific Conductance mV = millivolts ORP = Oxidative Reduction Potential CUP = Duplicate NE = Not established OOR = Out of range * EPA Region 4 Surface Water Quality Criterion for arsenic is given in terms of As(III), and analytical results are in terms of dissolved arsenic ** EPA and NCAC 2B Water Quality Criteria are given in terms of dissolved Cr(VI), and analytical results are in terms of dissolved chromium Y Hardness dependent - concentrations compared to EPA criteria at a default hardness of 100 mg/L of CaCO, and NCAC 2B criteria at a default hardness of 25 mg/L as CaCO3 < = concentration not detected at or above the reporting limit. P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\5.11 CSA. Reporting\Tables\Draft Tables\Table 12-14 Surface Water and Seep Analytical Results.xlsx Page 1 of 2 TABLE 12-14 SURFACE WATER AND SEEPS ANALYTICAL RESULTS EPA AND 1SA NCAC 2B RECOMMENDED WATER QUALITY CRITERIA FOR AQUATIC LIFE (ACUTE AND CHRONIC) MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Lead" Magnesium Manganese Mercury Methane Molybdenum Nickel" Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Zinc" DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT Reporting Units ug/1 ug/1 mg/l ug/l ug/1 ug/1 ug/l ug/l ug/l ug/1 ug/l mg-N/L mg/l ug/l ug/l mg/l mg/1 mg/1 mg/l mg/l ug/1 ug/1 mg/l mg/1 mg/1 ug/1 ug/1 mg/1 mg/1 EPA R4 FW Chronic 1.32 NE NE NE NE 0.012 NE NE NE 87.71 NE NE NE NE 5 NE NE NE NE 0.002 4 NE NE NE NE NE NE 0.05891 NE EPA Aquatic Life - Acute 65 NE NE NE NE 1.4 NE NE NE 470 NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE 0.12 NE EPA Aquatic Life - Chronic 2.5 NE NE NE NE 0.77 NE NE NE 52 NE NE NE NE 5 NE NE NE NE NE NE NE NE NE NE NE NE 0.12 NE SSA NCAC 26 Aquatic Life -Acute 14 NE NE NE NE NE NE NE NE 140 NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE 0.036 NE 15A NCAC 2B Aquatic Life - Chronic 0.54 NE NE NE NE 0.012 NE NE NE 16 NE NE NE NE 5 NE NE NE NE NE NE NE NE NE NE NE NE 0.036 NE Sample ID Sample Collection Date Analytical Results S-01 05/12/2015 <1 <1 8.16 3360 3370 <0.0005 89 <1 <1 <1 1.21 0.018 1.63 <1 <1 35.7 0.34 0.346 39 <0.1 <0.2 <0.2 260 1.5 95 <0.3 0.45 0.006 0.016 S-02 05/12/2015 <1 <1 13.3 3400 3320 0.00118 12 <1 <1 1.76 1.98 0.042 2.52 <1 <1 20.8 0.557 0.558 33 <0.1 <0.2 <0.2 330 1.3 <5 <0.3 <0.3 0.012 0.011 5-02B 05/13/2015 <1 <1 13.6 3250 3280 0.00145 15 <1 <1 1.77 2.04 0.033 2.53 <1 <1 21 0.552 0.563 36 <0.1 <0.2 <0.2 280 1.2 6 <0.3 <0.3 0.013 0.01 u to S-02B DUP 05/13/2015 <1 <1 13.5 3250 3280 0.000685 15 <1 <1 1.82 1.68 0.035 2.53 <1 <1 21 0.552 0.559 35 <0.1 <0.2 <0.2 330 1.3 5 <0.3 <0.3 0.01 0.01 S-04 05/13/2015 <1 <1 7.95 3520 3620 <0.0005 38 <1 <1 <1 1.1 <0.01 1.65 <1 <1 34.6 0.301 0.313 35 1 <0.1 <0.2 <0.2 240 1.4 28 <0.3 <0.3 <0.005 0.007 S-05 05/12/2015 <1 <1 13.9 17 79 8.96E-04 <10 12.7 11.8 <1 <1 0.081 5.46 <1 <1 11.2 0.24 0.248 46 <0.1 <0.2 <0.2 320 6.1 9 1.37 1.43 <0.005 <0.005 S-08 05/13/2015 <1 2.95 17.5 657 2790 0.008 <10 <1 <1 <1 4.25 0.095 3.35 <1 <1 21 0.661 0.691 53 <0.5 <0.2 <0.2 410 2.7 420 <0.3 5.19 <0.005 0.024 S-03 05/12/2015 <1 <1 10.2 1140 1170 0.00394 10 <1 <1 <1 <1 0.039 2.12 <1 <1 24 0.438 0.446 29 <0.5 <0.2 <0.2 240 2 9 <0.3 <0.3 0.007 <0.005 c S-06 05/13/2015 <1 <1 4.99 616 670 0.004 140 <1 <1 <1 <1 0.121 1.85 <1 <1 13 0.099 0.103 4.4 <0.5 <0.2 <0.2 140 4.2 65 0.588 2.75 0.016 0.009 'v m SW -CBI 05/13/2015 <1 <1 9.98 2100 2350 0.00595 120 <1 <1 <1 1.52 0.625 2.09 <1 <1 23.1 0.411 0.425 30 <1 <0.2 <0.2 220 .8 49 <0.3 1.83 0.012 0.013 SW-CB2 05/13/2015 <1 <1 6.57 8240 8330 0.0033 250 <1 <1 <1 <1 0.052 2.25 <1 <1 13.7 0.213 0.217 5 <0.1 <0.2 <0.2 170 L.8 30 0.397 0.811 0.008 <0.005 SW-REF1 OS/13/2015 <1 <1 3.6 315 338 0.002 35 <1 <1 <1 <1 0.058 1.68 <1 <1 8.84 0.073 0.074 1.8 <0.1 <0.2 <0.2 120 .5 5 0.451 1.09 0.016 0.007 Prepared by: KDF/SRW Checked by: MMS Notes: Bold color highlighted concentrations indicate highest exceedance of the category listed below: 0 - EPA Region 4 Surface Water Quality Criteria - Chronic, Nov 2001 - - EPA National Recommended Water Quality Criteria, Aquatic Life - Acute, June 2015 ® - EPA National Recommended Water Quality Criteria, Aquatic Life - Chronic, June 2015 0 - 15A NCAC 02B Criteria, Aquatic Life - Acute, January 2015 - 15A NCAC 02B Criteria, Aquatic Life - Chronic, January 2015 Temp = Temperature S.U. = Standard Unit Deg C = Degree Celsius ug/I = microgram per liter mg/I = milligrams per liter umhos/cm = micro mhos per centimeter mV = millivolts ORP = Oxidative Reduction Potential NE = Not established OOR = Out of range - EPA Region 4 Surface Water Quality Criteria - Chronic, Nov 2001 - MDL is greater than EPA National Recommended Water Quality Criteria, Aquatic Life - Acute, June 2015 0 - MDL is greater than EPA National Recommended Water Quality Criteria, Aquatic Life - Chronic, June 2015 - MDL is greater than ISA NCAC 02B Criteria, Aquatic Life - Acute, January 2015 0 - MDL is greater than 15A NCAC 02B Criteria, Aquatic Life - Chronic, January 2015 NTU = nephelometric turbidity unit DO = Dissolved Oxygen Spec Cord = Specific Conductance DUP = Duplicate * EPA Region 4 Surface Water Quality Criterion for arsenic is given in terms of As(III), and analytical results are in terms of dissolved arsenic ** EPA and NCAC 2B Water Quality Criteria are given in terms of dissolved Cr(VI), and analytical results are in terms of dissolved chromium Y Hardness dependent - concentrations compared to EPA criteria at a default hardness of 100 mg/L of CaCCj and NCAC 2B criteria at a default hardness of 25 mg/L as CaCO3 < = concentration not detected at or above the reporting limit. P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\5.11 CSA. Reporting\Tables\Draft Tables\Table 12-14 Surface Water and Seep Analytical Results.xlsx Page 2 of 2 TABLE 12-15 SOILS (0-2') ANALYTICAL RESULTS WITH SCREENING CRITERIA - EPA REGION 4 RECOMMENDED SCREENING VALUES FOR SOIL - ECOLOGICAL MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Percent Moisture pH at 25 Degrees C Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Thallium Total Organic Carbon Vanadium Zinc Reporting Units / S.U. mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg EPA R4-RSL Soil NE NE 50 3.5 10 165 1.1 0.5 1.6 NE NE 0.4 20 40 200 50 NE 100 0.1 2 30 NE NE 0.81 NE NE NE 1 NE 2 50 Sample ID Sample Collection Date Analytical Results ABMW-01 (1-1.5) 06/02/2015 40.8 10.4 6960 <4.3 16.6 150 2.1 27.4 <0.52 2070 <213 25 7.6 j 37.9 2240 13 561 18.4 <0.0068 <2.2 14.3 <21.3 1010 <4.3 <217 71.8 <213 <4.3 85100 39.3 18.8 u 0 SB-05 (1-2) 03/04/2015 26.5 6 5320 <0.68 1.8 47.1 0.36 <8.5 0.12 j 313 <173 <0.85 2.8 11.1 8280 5.4 1940 406 <0.0054 <1.7 <0.85 <17.3 1730 1.9 <170 4.2 <173 <0.68 502 j 6.8 36.3 0 SB-06 (1-2) 03/04/2015 20.3 5.9 2510 <0.63 1.2 j 54.8 0.17 2.9 j <0.075 <16.1 <154 0.74 2.5 13.1 3920 4.2 816 192 <0.0046 <0.32 0.55 <15.4 801 0.9 j 67.2 4.1 <154 <0.63 <377 2.7 14.7 SB-07 (1-2) 05/07/2015 13 5.1 9000 <2.9 <2.9 68.8 0.46 <7.3 <0.35 301 <143 11.4 5.9 7.7 9460 5.4 j 1110 693 0.037 <1.5 4.2 <14.3 534 <2.9 <145 5.7 <143 <2.9 1610 17.6 21.4 MW-03BR (0.8-1.2) 02/05/2015 16.8 5 7030 <1.5 <1.5 57.6 0.34 j <1.5 <0.18 332 <150 11.3 5.4 6.3 8480 3.3 2500 327 0.013 <3 5.1 <15 1070 <1.5 <29.8 5.4 <150 <1.5 3470 16 25.3 MW-07BR (1-2) 04/23/2015 2.8 5.6 3080 <2.6 <2.6 21.5 0.29 <6.4 <0.31 68.5 j <129 4.1 <2.6 7 7320 5.4 437 27.7 0.0073 j <1.3 0.68 j <12.9 315 <2.6 <128 2 j <129 <2.6 420 i 12.8 7 MW-08BR (0.75-1.25) 02/11/2015 19.5 6 14500 <1.6 <1.6 147 0.82 <31.7 <0.19 1120 <154 62.2 21.3 34.7 24700 8.9 10500 1230 <0.0048 <6.3 29.4 <15.4 6590 <1.6 <634 13.2 <154 <1.6 <300 50.6 88.9 MW-10BR (0.75-1.0) 02/23/2015 15.2 6.3 7640 <0.57 1.4 81.8 0.4 13.6 j 0.1 j 1210 NA 41.9 12.4 28.9 18600 9.8 5590 527 0.0053 j <0.28 16.3 NA 2660 1.4 93.4 9.4 <0.57 721 35.1 61.3 MW-11BR (0-2) 04/14/2015 31.6 5.2 19700 <3.7 <3.7 43.1 <0.19 <9.4 <0.45 1690 <177 22.6 6.4 j 59.1 52900 6.1 j 1590 52.6 0.13 <1.9 1.4 j <17.7 <188 <3.7 <188 18.6 <177 <3.7 2950 208 17.2 '-y MW-12D (1-2) 04/26/2015 17.5 4.9 11000 <3 3.6 j 19.6 <0.15 27.4 <0.36 <74.8 <151 43.6 <3 12.4 31200 6.8 139 j 22.1 0.036 <1.5 0.83 j <15.1 182 j <3 <150 <1.5 <151 <3 1110 61 5.2 j u � MW-138R (0-2) 04/12/2015 26.2 4.9 15500 <3.3 <3.3 72.9 0.33 <8.1 <0.39 38.1 <167 6.1 <3.3 10.9 19600 6.2 j 1840 82.8 0.029 0.42 j 0.53 <16.7 1360 <3.3 <32.6 1.8 <167 <3.3 1210 32.4 25.4 MW-15BR (0.5-1) 05/09/2015 19.4 5.2 8440 <3.1 <3.1 64.6 0.24 j <7.7 <0.37 491 <153 10.4 3.9 j 12.5 15600 4.7 j 3760 108 0.0056 j <1.5 1.3 j <15.3 1370 <3.1 <155 11.2 <153 <3.1 1820 27.1 18.9 MW-16BR (1-2) 04/25/2015 24.9 5.1 5360 <3.2 <3.2 95.4 0.4 <8.1 <0.39 253 <166 7.6 6 j 4.3 7710 6.3 j 454 1250 0.012 <1.6 1.9 <16.6 254 j <3.2 <162 3.2 j <166 <3.2 3350 17.3 1 10.4 SB-01 (1-2) 03/04/2015 30.6 6.3 7030 <0.7 1.2 j 49.6 0.24 9.6 <0.084 655 <181 15.7 3.7 8.8 12400 9.6 1670 104 0.033 <0.35 2.5 <18.1 881 <0.7 35.4 j 6 <181 <0.7 9060 28.3 14.5 SB-02 (0.5-2) __[ 03/03/2015 35.5 5.3 10200 <0.8 1.9 65.7 0.52 16.3 j 0.13 j 227 <196 12.9 6.4 22.8 18300 7.5 2420 365 0.02 <0.4 1.7 <19.6 2020 1.3 j <39.9 4.3 <196 <0.8 3750 44.8 27.3 Prepared by: KDF/SRW Checked by: MMS Notes: Bold color highlighted concentrations indicate highest exceedance of the category listed below: EPA Region 4 Criteria - Soil - MDL is greater than EPA Region 4 Criteria - Soil Dup = Duplicate NE = Not established mg/kg = miligram per kilogram S.U. = Standard Units % = percent j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. < = concentration not detected at or above the reporting limit. 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Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-15 Soils (0-2) Analytical Results_MDL.xlsx Page 1 of 1 TABLE 12-16 SEDIMENT ANALYTICAL RESULTS WITH SCREENING CRITERIA EPA REGION 4 SOIL SCREENING LEVELS EPA REGION 4 EFFECTS VALUES - SEDIMENT MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Percent pH at 25 Nitrate Total Analytical Parameter Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel Potassium Selenium Sodium Strontium Sulfate Thallium Organic Vanadium Zinc Moisture Degrees C (as N) Carbon Reporting Units % S.U. mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg EPA Region 4-RSL Soil NE NE 50 3.5 10 165 1.1 0.5 1.6 NE NE 0.4 20 40 200 50 NE 100 0.1 2 30 NE NE 0.81 NE NE NE 1 NE 2 50 EPA Region 4-Effects Value NE NE NE 2 7.24 NE NE NE 0.676 NE NE 52.3 NE 18.7 NE 30.2 NE NE 0.13 NE 15.9 NE NE NE NE NE NE NE NE NE 124 Sample ID Sample Analytical Results Collection Date S-01 05/12/2015 65.5 6.4 1120 <7.2 56.4 271 <0.36 40.4 <0.86 1580 <353 5.8 <7.2 <1.8 247000 <7.2 664 511 <0.012 <3.6 <7.2 <35.3 <359 <7.2 <359 40.1 <353 <7.2 18400 <7.2 227 S-02 05/13/2015 26.9 6.5 3390 <3.4 <3.4 49.1 0.25j <8.5 <0.41 513 <170 8 16.4 7.8 16000 <3.4 1580 1060 <0.0056 <1.7 3.2 <17 687 <3.4 <170 6.8 <170 <3.4 1130 13.3 18.7 u c 5-028 OS/13/2015 18.9 6.6 2170 <3.2 <3.2 31.8 0.21 j <7.9 <0.38 507 <156 3.4 4.7 j 4.8 12700 <3.2 1110 427 <0.0048 <1.6 0.96 j <15.6 471 <3.2 <158 5.3 <156 <3.2 1030 5.8 j 10.7 w S-04 05/13/2015 57 6.9 6190 <6 14.1 164 0.33j 16.9j <0.72 2100 <293 15.4 14 12.3 101000 <6 3250 2400 <0.0092 <3 3.2 <29.3 1390 <6 <301 33.6 <293 <6 12900 22.3 26.6 S-08 05/13/2015 43.5 6.8 2900 <4.4 <4.4 179 0.7 <10.9 <0.52 1280 <218 4.5 40.6 4.9 10700 4.9 j 656 7090 0.01 j <2.2 4.8 <21.8 310 j <4.4 <218 29.2 <218 <4.4 3510 7.3 j 12.8 S-03 05/12/2015 19.5 7.1 5030 <3.2 <3.2 38.3 0.44 <8.1 <0.39 625 <157 94.4 7.4 5.4 15600 14 1140 562 <0.0049 <1.6 2.8 <15.7 342 <3.2 <162 10 <157 <3.2 1290 42.5 12.6 rn c S-06 05/13/2015 52.7 6.6 7500 <4.9 <4.9 80.9 0.37j <12.4 <0.59 2010 <258 18.5 7.4j 15.9 17400 8j 3090 436 0.0096j <2.5 7.4 <25.8 1230 <4.9 <247 15.5 <258 <4.9 23500 33.6 174 "y v SW-CB1 05/13/2015 30.2 6.3 6760 <3.6 <3.6 53.1 0.38 <8.9 <0.43 763 <175 13.1 4.5j 10.4 9660 3.6j 3070 186 0.0065j <1.8 5.2 <17.5 1590 <3.6 <178 10.3 <175 <3.6 3770 16.5 39.6 SW-CB2 05/13/2015 56.5 7 7350 <5.5 <5.5 98.2 0.29j <13.8 <0.66 1060 <283 13.9 6.1j 9.5 11400 7.4j 2170 383 0.027 <2.8 5 <28.3 952 <5.5 <277 16.3 399j <5.5 24800 19.2 31.4 SW-REF1 05/13/2015 26.2 6.4 2610 <3.6 1 <3.6 23.7 0.18 j <8.9 <0.43 1 335 <167 1 17.3 1 <3.6 3.3 7100 1 3.7 j 937 122 1 <0.0051 11.8 2.4 <16.7 1 470 <3.6 <178 3.2 j <167 <3.6 5210 1 15.1 14.8 Prepared by: KDF/SRW Checked by: MMS Notes: Bold highlighted concentrations indicate highest exceedance of the category listed below: - EPA Region 4 Sail Screening Levels - EPA Region 4 Effects Value for Sediment - MDL is greater than EPA Region 4 Soil Screening Levels - MDL is greater than EPA Region 4 Effects Value Dup = Duplicate mg/kg = miligram per kilogram NE = Not established S.U. = Standard Units = percent j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. < = concentration not detected at or above the reporting limit. 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Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-16 Sediment Analytical Results_MDL.xlsx Page 1 of 1 TABLE 12-17 MATRIX FOR DETERMINATION OF CONSTITUENTS OF POTENTIAL CONCERN - ECOLOGICAL MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter pH Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Methane Molybdenum ol Nickel Nitrate Nitit N) (asCarbon Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Total Organic Vanadium Zinc Medium/Basis for COPC Designation Soil Concentration exceeds screening value ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ MDL Exceeds screening value ✓ ✓ ✓ ✓ ✓ ✓ No screening value ✓ ✓ ✓ ✓ ✓ ✓ Sediment Concentration exceeds screening value ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ MDL Exceeds screening value ✓ ✓ ✓ ✓ ✓ ✓ ✓ No screening value ✓ ✓ ✓ ✓ ✓ ✓ Surface Water Concentration exceeds screening value ✓ ✓ ✓ ✓ MDL Exceeds screening value ✓ ✓ ✓ ✓ No screening value ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Seep Concentration exceeds screening value ✓ ✓ ✓ ✓ ✓ MDL Exceeds screening value ✓ ✓ ✓ ✓ No screening valuel I I✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Prepared by: MMS/KDF Checked by: MMS. Notes: Constituent determined to be a COPC due to exceedance of one or more screening criteria at one or more sample locations ✓ Constituent determined to be a tentative COPC due to a lack of screening criteria Constituent not determined to be a COPC due to no exceedances of any screening criteria at any sample locations Based on data from Tables 12-12 through 12-14 P:\Duke Energy Progress. 1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-17 Matrix Ecological.xlsx Page 1 of 1 TABLE 16-1 RECOMMENDED GROUNDWATER MONITORING PARAMETERS AND ANALYTICAL METHODS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC PARAMETER I RL JUNITS IMETHOD FIELD PARAMETERS H NA SU Field Water Quality Meter Specific Conductance NA PS/cm Field Water Quality Meter Temperature NA oC Field Water Quality Meter Dissolved Oxygen NA mg/L Field Water Quality Meter Oxidation Reduction Potential NA mV Field Water Quality Meter Turbidity NA NTU Field Water Quality Meter INORGANICS Aluminum 0.005 mg/L EPA 200.7 or 6010C Antimony 0.001 m /L EPA 200.8 or 6020A Arsenic 0.001 mg/L EPA 200.8 or 6020A Barium 0.005 m /L EPA 200.7 or 6010C Beryllium 0.001 mg/L EPA 200.8 or 6020A Boron 0.05 m /L EPA 200.7 or 6010C Cadmium 0.001 mg/L EPA 200.8 or 6020A Chromium 0.001 m /L EPA 200.7 or 6010C Cobalt 0.001 mg/L EPA 200.8 or 6020A Copper 0.001 m /L EPA 200.8 or 6020A Iron 0.01 mg/L EPA 200.7 or 6010C Lead 0.001 m /L EPA 200.8 or 6020A Manganese 0.005 mg/L EPA 200.8 or 6020A Mercury 0.0005 m /L EPA 245.1 Molybdenum 0.001 mg/L EPA 200.8 or 6020A Nickel 0.001 m /L EPA 200.7 or 6010C Selenium 0.001 mg/L EPA 200.8 or 6020A Silver 0.001 1 m /L IEPA 200.8 or 6020A Thallium (low level) 0.0002 mg/L IEPA 200.8 or 6020A Vanadium 0.0003 m /L IEPA 200.8 or 6020A Zinc 0.005 mg/L EPA 200.7 or 6010C ANIONS/CATIONS Alkalinity (as CaCO3) 20 mg/L SM 2320B Bicarbonate 20 m /L SM 2320 Calcium 0.01 mg/L EPA 200.7 Carbonate 20 m /L SM 2320 Chloride 0.1 mg/L EPA 300.0 or 9056A Magnesium 0.005 m /L EPA 200.7 Nitrate as Nitrogen 0.023 mg-N/L EPA 300.0 or 9056A Potassium 0.1 m /L EPA 200.7 Sodium 0.05 mg/L EPA 200.7 Sulfate 0.1 m /L EPA 300.0 or 9056A Total Dissolved Solids 25 mg/L SM 2540C Total Or anic Carbon 10.1 1 m /L ISM 5310 Total Suspended Solids 12 1 m L ISM 2450D Notes: 1. Select constituents will be analyzed for total and dissolved concentrations. 2. RL is the laboratory analytical method reporting limit. NA indicates not applicable. P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Report Tables\Table 16-1 Mayo Recommended Parameters and Methods.xlsx TABLE 16-2 RECOMMENDED GROUNDWATER MONITORING LOCATIONS MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Monitoring Installation ID Geologic Unit Monitored Position Relative to Ash Basin BG-1 Bedrock Upgradient/Background (south) BG-2 Transition Zone Upgradient/Background (south) CW-1 Transition Zone Sidegradient (east) CW-ID Bedrock Sidegradient (east) CW-2 Transition Zone Downgradient of ash basin dam/Crutchfield Branch area (north) CW-2D Bedrock Downgradient of ash basin dam/Crutchfield Branch area (north) CW-3 Transition Zone Downgradient (north) CW-4 Bedrock Downgradient (northwest) CW-5 Bedrock Upgradient (west) CW-6 Bedrock Downgradient (northeast) MW-2 unknown Downgradient (north) MW-3 unknown Downgradient of ash basin dam/Crutchfield Branch area MW-4 unknown Upgradient (east) MW-3BR Bedrock Downgradient (north) MW-5BR Bedrock Upgradient (west) MW-6BR Bedrock Piezometer/Water level only (northeast) MW-7D Transition Zone Mayo Lake flow regime (northeast) MW-7BR Bedrock Mayo Lake flow regime (northeast) MW-8S Saprolite Piezometer/Water level only (northeast) MW-8D Transition Zone Piezometer/Water level only (northeast) MW-8BR Bedrock Mayo Lake flow regime (northeast) MW-9BR Bedrock Mayo Lake flow regime (northeast) MW-10BR Bedrock Upgradient/Background (southeast) MW-11BR Bedrock Upgradient/Background (southwest) MW-12S Saprolite Upgradient/Background (south) MW-12D Transition Zone Upgradient/Background (south) MW-13BR Bedrock Upgradient (west) MW-14BR Bedrock Upgradient/Background (west) MW-15BR Bedrock Piezometer/Water level only (north) MW-16S Alluvium Downgradient of ash basin dam/Crutchfield Branch area (north) MW-16D Transition Zone Downgradient of ash basin dam/Crutchfield Branch area (north) MW-16BR Bedrock Downgradient of ash basin dam/Crutchfield Branch area (north) DEP-1 Bedrock Upgradient of ash basin; Mayo Lake flow regime DEP-2 Bedrock Upgradient of ash basin DEP-3 Bedrock Upgradient of ash basin P-1 Ash Basin Dam Piezometer/Water level only P-1A Ash Basin Dam Piezometer/Water level only P-2 Ash Basin Dam Piezometer/Water level only P-2A Ash Basin Dam Piezometer/Water level only P-3 Ash Basin Dam Piezometer/Water level only P-3A Ash Basin Dam Piezometer/Water level only P-4 Ash Basin Dam Piezometer/Water level only P-4A Ash Basin Dam Piezometer/Water level only Prepared by: JAW Checked by: EMB File: P:\Duke Energy Progress. 1 026\1 05. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\ReportTables\Table 16-2 Recommended Groundwater Monitoring Locations.xlsx Page 1 of 1