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HomeMy WebLinkAboutNC0003425_Roxboro Tables_20160801Comprehensive Site Assessment Supplement 1 August 2016 Roxboro Steam Electric Plant TABLES SynTerra P: \Duke Energy Progress.1026\ 107. Roxboro Ash Basin GW Assessment Plan\ 19.EG_CSASUP\Final ROXBORO CSA Supplement 1 July 2016.docx TABLE 1-1 WELL CONSTRUCTION DATA ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC ID Program Date Installed Monitoring Zone Material Diameter (Inches) Northing (Feet) Easting (Feet) Measuring Point TOC Elevation (Feet-MSL) Ground Surface Elevation (Feet-MSL) Boring Depth2 l Surface 3 (Feet-BGS) Total Well 2,3 (Feet-BGS) Measured i (Feet-TOC) Screened 3 Interval (Feet-BGS) Top of Screen Elevation (Feet-MSL) Bottom of Screen Elevation (Feet-MSL) Ash Basin Monitoring Wells ABMW-1 CAMA 4/28/2015 Ash PVC 2 991717.60 1977553.39 470.58 467.57 73 NA 73 73.00 65 70 402.57 397.57 ABMW-1BR CAMA 4/30/2015 Bedrock PVC 2 991717.87 1977548.29 470.60 467.66 118 82 118 121.61 108 118 359.66 349.66 ABMW-2 CAMA 5/3/2015 Ash PVC 2 990476.64 1978113.17 471.73 469.00 78.5 NA 76 80.48 70.7 75.7 398.30 393.30 ABMW-2BR CAMA 5/5/2015 Bedrock PVC 2 990481.81 1978118.15 471.68 468.94 103.8 83 103.8 106.35 98.8 103.8 370.14 365.14 ABMW-3 CAMA 4/27/2015 Ash PVC 2 992468.82 1977830.05 471.75 468.18 11 NA 8 11.00 3 8 465.18 460.18 ABMW-3BR CAMA 5/5/2015 Bedrock PVC 2 992469.71 1977834.64 471.87 468.22 77 19 59 57.00 47 57 421.22 411.22 ABMW-3BRL CAMA/VOLUNTARY DATA GAP 3/18/2016 Bedrock PVC 2 992476.56 1977828.55 471.904 468.265 303* 60 245.25 248.00* 235.25 245.25 233.02 223.02 ABMW-4 CAMA 4/18/2015 Ash PVC 2 993230.04 1980874.56 500.14 497.30 53 NA 48 51.23 43 48 454.30 449.30 ABMW-4BR CAMA 4/27/2015 Bedrock PVC 2 993231.94 1980879.20 500.14 497.23 99 50 99 99.10 90.2 95.2 407.03 402.03 ABMW-5 CAMA 3/17/2015 Ash PVC 2 993818.44 1980356.45 480.03 477.37 60 NA 58 56.00 51 56 426.37 421.37 ABMW-5D CAMA 3/18/2015 Saprolite PVC 2 993819.31 1980358.91 479.98 477.27 94 60 94 91.00 86 91 391.27 386.27 ABMW-6 CAMA 3/13/2015 Ash PVC 2 993007.81 1980056.17 481.13 478.25 63 NA 60 62.97 55 60 423.25 418.25 ABMW-6BR CAMA 3/14/2015 Bedrock PVC 2 993008.04 1980058.74 481.19 478.19 87 62 87 90.00 82 87 396.19 391.19 ABMW-7 CAMA 3/15/2015 Ash PVC 2 993704.63 1980943.64 479.33 476.64 80 NA 78 80.13 72 77 404.64 399.64 ABMW-7BR CAMA 3/16/2015 Bedrock PVC 2 993704.41 1980941.24 479.29 476.44 137 80 132.6 135.11 127.6 132.6 348.84 343.84 ABMW-7BRL CAMA/VOLUNTARY DATA GAP 3/31/2016 Bedrock PVC 2 993697.74 1980958.06 480.431 477.53 306* 88 295 298.00* 285 1 295 192.53 182.53 Monitoring Wells BG-1BR CAMA BKGRD 4/14/2015 Bedrock PVC 2 987880.96 1976137.66 534.68 531.20 93 53 93 95.55 82 92 449.20 439.20 BG-1D CAMA BKGRD 4/10/2015 Transition PVC 2 987877.39 1976136.75 534.50 531.18 44 NA 44 48.00 39 44 492.18 487.18 BG-1BRL CAMA BKGRD/DATA GAP 3/2/2016 Bedrock PVC 2 988112.06 1976428.287 519.993 517.277 297* 47 275 278.00* 265 275 252.28 242.28 MW-1BR CAMA 3/26/2015 Bedrock PVC 2 994421.40 1982989.86 507.86 504.82 77 27.5 77 76.20 66.2 76.2 438.62 428.62 MW-2BR CAMA 3/12/2015 Bedrock PVC 2 992275.11 1979378.74 493.79 490.79 37 NA 37 38.98 30.1 35.4 460.69 455.39 MW-3BR CAMA 5/14/2015 Bedrock PVC 2 995567.44 1982389.53 452.77 449.59 68 7 68 67.10 57.1 67.1 392.49 382.49 MW-4BR CAMA 5/13/2015 Bedrock PVC 2 987870.41 1978604.32 502.46 499.10 111 NA 92 93.44 80 90 419.10 409.10 MW-4BRL CAMA/VOLUNTARY DATA GAP 3/8/2016 Bedrock PVC 2 987877.36 1978601.48 502.624 499.664 307* 42 305 308.00* 285 305 214.66 194.66 MW-5BR CAMA 3/31/2015 Bedrock PVC 2 993047.04 1978346.60 458.97 455.94 74 28 74 73.00 62.8 73 393.14 382.94 MW-5D CAMA 3/27/2015 Transition PVC 2 993051.09 1978345.24 458.71 455.76 20.9 NA 20.9 20.40 15.4 20.4 440.36 435.36 MW-6BR CAMA 4/2/2015 Bedrock PVC 2 993847.69 1978041.65 417.73 415.02 75 27 75 76.75 62.9 73 352.12 342.02 MW-6D CAMA 4/1/2015 Transition PVC 2 993844.55 1978041.17 417.71 415.01 22 NA 22 23.79 16 21 399.01 394.01 MW-7BR CAMA 4/16/2015 Bedrock PVC 2 989954.04 1975502.89 478.10 475.15 67 NA 59.5 60.33 47 57 428.15 418.15 MW-BR CAMA 4/28/2015 Bedrock PVC 2 991669.30 1975524.61 482.75 479.85 88 NA 88 86.60 76.4 86.4 403.45 393.45 MW-9BR CAMA 5/4/2015 Bedrock PVC 2 992764.11 1976206.52 450.17 447.25 79.5 NA 52 55.08 42 52 405.25 395.25 MW-10BR CAMA BKGRD 4/8/2015 Bedrock PVC 2 989997.66 1982067.90 536.23 533.42 42 NA 42 44.15 36 41 497.42 492.42 MW-11BR CAMA 3/4/2015 Bedrock PVC 2 993472.00 1979319.02 467.54 464.80 45.8 NA 45.8 45.80 40.5 45.5 424.30 419.30 MW-12BR CAMA 4/29/2015 Bedrock PVC 2 991274.91 1976269.54 456.45 453.48 57 NA 57.00 60.00 52 57 401.48 396.48 MW-13BR CAMA BKGRD 3/4/2015 Bedrock PVC 2 990704.40 1982798.16 552.98 550.12 57 NA 49 58.75 43 48 507.12 502.12 MW-14BR CAMA BKGRD 2/28/2015 Bedrock PVC 2 996095.64 1984648.02 513.34 510.56 83 42 83 85.20 77 82 433.56 428.56 MW-14S CAMA BKGRD 3/2/2015 Saprolite PVC 2 996092.18 1984650.67 513.36 510.39 37.5 NA 37.5 38.68 31 36 479.39 474.39 MW-14D CAMA BKGRD 3/2/2015 Transition PVC 2 1 996094.02 1 1984649.28 1 513.39 1 510.48 1 55.5 1 NA 55.5 57.58 50 55 460.48 455.48 P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tab1es\Ta1ble 1-1 Well Construction Data.xlsx Page 1 of 2 TABLE 1-1 WELL CONSTRUCTION DATA ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC ID Program Date Installed Monitoring Zone Material Diameter (Inches) Northing (Feet) Easting (Feet) Measuring Point TOC Elevation (Feet-MSL) Ground Surface Elevation (Feet-MSL) Boring Depth2 l Surface 3 (Feet-BGS) Total Well 2,3 (Feet-BGS) Measured i (Feet-TOC) Screened 3 Interval (Feet-BGS) Top of Screen Elevation (Feet-MSL) Bottom of Screen Elevation (Feet-MSL) Monitoring Wells M W-15BR CAMA BKGRD 4/9/2015 Bedrock PVC 2 987071.73 1977796.64 508.28 504.83 85 NA 62 63.58 50 60 454.83 444.83 M W-15D CAMA BKGRD 4/18/2015 Transition PVC 2 987068.84 1977798.33 508.42 505.24 31 NA 31 33.95 21 31 484.24 474.24 M W-16BR CAMA BKGRD 4/7/2015 Bedrock PVC 2 990431.57 1981217.87 520.51 517.62 58 NA 58 58.59 50.5 55.5 467.12 462.12 M W-17BR CAMA BKGRD 4/22/2015 Bedrock PVC 2 992038.66 1985264.19 534.54 532.05 82 NA 75 77.24 65 75 467.05 457.05 M W-18BR CAMA BKGRD 5/18/2015 Bedrock PVC 2 986577.83 1982230.65 532.64 529.44 108 61 108 110.19 97.1 107.1 432.34 422.34 MW-18D CAMA BKGRD 5/16/2015 Transition PVC 2 986575.38 1982232.70 532.66 529.66 58.4 NA 58.1 61.03 48.1 58.1 481.56 471.56 MW-19BRL CAMA/ DATA GAP 6/9/2016 Bedrock PVC 2 990230.279 1982876.094 564.32 561.155 77 NA 73 77.00 63 73 498.16 488.16 M W-20BRL CAMA/ VOLUNTARY DATA GAP 2/27/2016 Bedrock PVC 2 993029.10 1984933.11 487.112 483.468 207 26 205 205.00* 195 205 288.47 278.47 M W-21BRL CAMA/ VOLUNTARY DATA GAP 4/28/2016 Bedrock PVC 2 991832.78 1982130.13 529.594 526.569 297 37 158 160.84 143 158 383.57 368.57 M W-22BRL CAMA/ VOLUNTARY DATA GAP 4/13/2016 Bedrock PVC 2 994705.94 1981526.19 474.083 470.786 302 37 300 303.00* 290 300 180.79 170.79 M W-22BR CAMA/ VOLUNTARY DATA GAP 4/15/2016 Bedrock PVC 2 994705.94 1981529.13 474.003 470.928 72 37 70 74.25 60 70 410.93 400.93 M W-22D CAMA/ VOLUNTARY DATA GAP 4/14/2016 Bedrock PVC 2 994705.94 1981520.31 474.049 470.788 40 NA 36 38.93 26 36 444.79 434.79 M W-23BR CAMA/ VOLUNTARY DATA GAP 6/8/2016 Bedrock PVC 2 993204.21 1984286.30 518.935 515.742 129 NA 129 133.00 119 129 396.74 386.74 M W-24BR CAMA/ VOLUNTARY DATA GAP 6/8/2016 Bedrock PVC 2 992253.43 1985191.48 527.065 524.022 155 NA 155 158.85 145 155 379.02 369.02 MW-25BR CAMA/VOLUNTARY DATA GAP 6/7/2016 Bedrock PVC 2 991842.17 1984850.17 543.379 540.356 110 NA 110 113.74 100 110 440.36 430.36 M W-26BR CAMA/ VOLUNTARY DATA GAP 6/8/2016 Bedrock PVC 2 988570.28 1982360.46 521.289 518.036 84 NA 84 84.20 74 84 444.04 434.04 Previously Installed Wells BG-1 NPDES/CAMA BKGRD 11/2/2010 Transition- Bedrock PVC 2 987881.60 1976145.70 533.74 530.89 52.5 NA 52.5 54.79 32.5 52 498.39 478.89 CW-1 NPDES 10/29/2010 Bedrock PVC 2 994400.84 1983011.71 508.24 505.77 40.25 NA 40.25 42.61 19.95 39.75 485.82 466.02 CW-2 NPDES 10/29/2010 Transition PVC 2 993052.60 1977462.67 424.60 421.74 18 NA 17.8 20.14 7.7 17.5 414.04 404.24 CW-2D NPDES 10/28/2010 Bedrock PVC 2 993049.41 1977468.27 424.60 422.15 30.4 NA 30.4 32.60 25.1 29.9 397.05 392.25 CW-3 NPDES 10/26/2010 Transition PVC 2 988904.54 1977321.01 451.79 448.46 11.4 NA 11.4 14.26 3.4 11.4 445.06 437.06 CW-31D NPDES 10/29/2010 Bedrock PVC 2 988904.35 1977313.05 451.61 448.12 47 NA 46.5 49.56 41.7 46.5 406.42 401.62 CW-4 NPDES 11/1/2010 Transition- Bedrock PVC 2 987736.04 1978596.91 479.65 477.26 39.5 NA 39 42.23 24.2 39 453.06 438.26 CW-5 NPDES 11/3/2010 Transition PVC 2 993025.77 1978359.73 459.74 457.43 21.9 NA 21.9 22.20 4.7 19.5 452.73 437.93 GMW-6 SOLID WASTE 3/14/2002 Transition PVC 2 994176.00 1981014.17 480.10 477.70 45 NA 45 46.47 30 45 447.70 432.70 GMW-7 SOLID WASTE 6/28/2010 Bedrock PVC 2 992406.86 1981055.19 499.60 496.96 54 NA 54 57.38 39 54 457.96 442.96 GMW-8 SOLID WASTE 3/14/2002 Bedrock PVC 2 991818.76 1982129.87 528.55 525.58 65 NA 65 66.86 53 63 472.58 462.58 GMW-9 SOLID WASTE 3/14/2002 Bedrock PVC 2 991723.26 1983059.40 536.22 533.80 45 NA 45 48.73 30 45 503.80 488.80 GMW-10 SOLID WASTE 9/25/2002 Bedrock PVC 2 994405.33 1981428.52 494.11 490.97 45 NA 45 48.55 30 45 460.97 445.97 GMW-11 SOLID WASTE 9/26/2002 Bedrock PVC 2 994284.70 1981768.83 496.55 493.41 45 NA 45 49.04 30 45 463.41 448.41 M W-1 AUTHORIZATION TO CONSTRUCT 12/22/1986 Saprolite PVC 2 992754.72 1977587.31 422.45 421.28 28 NA 28 28.00 23 28 398.28 393.28 M W-2 AUTHORIZATION TO CONSTRUCT 12/22/1986 Transition PVC 2 992334.64 1976849.04 422.90 421.34 25.6 NA 25.5 25.50 20.5 25.5 400.84 395.84 PZ-12 SOLID WASTE 5/6/2003 Ash PVC 2 992994.77 1 1983152.75 1 514.41 511.64 50.0 1 NA 50.0 1 55.00 30 50 481.64 461.64 PZ-14 SOLID WASTE UNK UNK PVC 2 993893.20 1 1980352.80 1 471.74 1 468.85 1 UNK I NA I UNK 1 46.60 UNK UNK UNK UNK Prepared by: BER Checked by: CDE/ JHG Notes: BGS = Below ground surface NA = Not applicable TOC = Top of casing MSL = Mean sea level UNK = Data not known *= wells over 200 ft, total depth estimated = Well depths initially measured by SynTerra June 15, 2015 and updated as new wells are installed. z = "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 P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-1 Well Construction Data.xlsx Page 2 of 2 TABLE 1-2 TRANSITION ZONE GROUNDWATER EXCEEDANCES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Barium Boron Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Iron Manganese Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs 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 mg/I ug/I mg/I ug/I mg/I ug/I SSA NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 700 700 0.07^ 0.07^ 10 1* 1000 300 50 10 20 NE NE 250 0.2* 500 0.3* Sample IO Sample Collection Date Field Parameters Analytical Results Background BG-1 11/30/2010 6.8 38.81 19 491 NM NM NM 8.56 NM <0.5 69.7 <50 NA NA 11.1 NA 11.2 881 27.2 1.3 <10 NA NA 12.5 <0.1 299 NA BG-1 04/20/2011 6.4 38.42 20 460 4.42 58 263 9.92 NM <0.5 73.1 <50 NA NA 15 NA 11.4 499 18.5 1.4 <10 NA NA 11.7 <0.1 282 NA BG-1 07/13/2011 6.4 38.48 22 459 6.8 -136 69 9.58 NM <0.5 84 b <50 NA NA 42.7 NA <5 752 25.8 b 1.1 <10 NA NA 11.6 b <0.1 248 b NA BG-1 11/02/2011 6.6 39.72 21 475 5.48 -82 123 9.42 NM <0.5 75.6 <50 NA NA 16.8 NA <5 307 7.8 1.3 <10 NA NA 12.4 <0.1 263 b NA BG-1 04/02/2012 6.4 38.73 23 467 5.11 -72 133 9.8 NM <0.5 72.3 <50 NA NA 8.8 NA <5 286 6.5 1.6 <10 NA NA 11.7 <0.1 298 NA BG-1 07/11/2012 6.3 38.94 18 487 5.33 -51 154 8.57 NM <0.5 81 <50 NA NA <5 NA 6.4 866 18.7 1.5 <10 NA NA 14.2 <0.1 312 NA BG-1 11/06/2012 6.4 40.00 15 468 6.36 140 345 7.91 NM <0.5 84.2 <50 NA NA 16.1 NA <5 532 11.1 1.5 <10 NA NA 14.3 <0.1 300 NA BG-1 04/08/2013 6.3 39.74 18 475 5.9 115 320 5.24 NM <1 79 <50 NA NA <5 NA <5 113 5 1.6 <1 NA NA 11 <0.2 310 NA BG-1 07/08/2013 6.3 39.31 19 482 6.79 10 215 6.79 NM <1 83 <50 NA NA 10 NA <5 368 9 1.7 <1 NA NA 12 <0.2 330 NA BG-1 11/11/2013 6.4 39.73 18 488 5 182 387 9.8 NM <1 83 <50 NA NA 7 NA <5 507 11 1.7 <1 NA NA 12 <0.2 320 NA BG-1 04/03/2014 6.4 39.10 18 506 6.8 253 458 6.6 NM <1 86 <50 NA NA 6 NA <5 370 8 1.9 <1 NA NA 13 <0.2 320 NA BG-1 07/15/2014 6.3 38.54 18 496 5.37 179 384 4.4 NM <1 81 <50 NA NA <5 NA <5 218 6 2 <1 NA NA 14 <0.2 330 NA BG-1 11/12/2014 6.5 39.38 17 505 6.79 345 550 7.45 NM <1 87 <50 NA NA 6 NA <5 437 9 1.9 <1 NA NA 13 <0.2 310 NA BG-1 04/16/2015 6.6 30.05 16 574 3.1 341 546 7.86 NM <1 95 <50 NA NA 13 2.54 <5 283 54 1.8 3.57 35.4 NA 40 <0.2 370 NA BG-1 07/09/2015 6.5 38.45 18 531 3.1 129 334 11 NM <1 90 <50 NA NA 6 1.28 <5 518 36 10 1.29 32.3 NA 24 <0.2 360 17.1 BG-1 09/16/2015 6.5 39.38 18 529 4.7 157 362 9.81 0 <1 91 <50 NA NA 6.77 <1 3.19 811 21 NA 1.44 30.5 414 27 0.231 320 22.7 BG-1 11/05/2015 6.5 39.50 18 532 4.2 149 354 13 NM <1 92 <50 NA NA 8 <1 <5 594 21 11 1.39 32.9 449 25 <0.2 350 18.1 BG-1 12/05/2015 6.4 39.18 17 535 3.67 125 330 9.5 NM <0.5 86 <50 6.2 NA 5.6 0.62 2 360 16 NA 1.2 32.4 440 20.6 <0.1 331 14.5 BG-1 01/05/2016 6.4 38.65 15 528 3.49 170 375 8.46 0 <1 91 <50 4.5 NA 9.02 <1 2.49 484 17 NA 1.01 31.6 445 23 <0.2 350 17.5 BG-1 04/07/2016 6.5 36.66 17 535 5.11 125 330 8.12 NM <1 97 <50 10.2 NA 18 1.85 10 1760 34 11 1.78 31.5 436 24 <0.2 330 24.4 MW-15D 05/30/2015 6.4 8.29 18 658 0.9 58 263 2.57 0 <1 10 <50 NA NA 1.26 4.01 <1 163 316 NA <1 28.4 243 29 <0.2 410 4.96 MW-15D 09/12/2015 7.1 10.76 20 668 1.4 35 240 6.59 NM <1 9 <50 NA NA 2.4 1.11 1.42 671 80 NA <1 29.2 241 28 <0.2 400 7.66 MW-15D 12/05/2015 6.7 8.02 14 624 1.94 35 240 0.74 0 <0.5 5 <50 2.1 NA 1.7 <0.5 <1 58 45 NA <0.5 29.2 240 24.3 <0.1 421 6.5 MW-15D 01/05/2016 6.4 6.63 10 617 1.18 151 356 3.29 0 <1 8 <50 1.5 M6 NA 1.77 <1 <1 240 48 NA <1 26.3 231 24 <0.2 430 8.03 MW-15D 06/23/2016 6.6 7.58 19 653 1.94 166 371 3.04 0 <1 7 <50 2.7 NA 2.56 <1 <1 48 23 3.6 <1 28.9 239 29 <0.2 430 9.15 MW-18D 06/09/2015 11.5 45.58 20 1216 2.2 -91 114 3.13 0 1.72 68 <50 NA NA 73 <1 1.67 148 <5 NA 15.9 59.7 1270 130 <0.2 580 6.83 MW-18D 06/29/2015 11.8 45.88 20 1933 2 7 212 5.81 NM NA NA NA NA 58.6 z NA NA NA NA NA NA NA NA NA NA NA NA NA MW-18D 09/14/2015 8.6 46.71 19 910 0.7 -13 192 13.1 0 2.53 39 <50 NA NA 16.9 <1 <1 51 182 NA 2.78 39.6 764 61 <0.2 650 1.51 MW-18D 12/06/2015 7.1 47.45 17 1049 3.15 28 233 7.16 0 0.64 36 <50 5.1 NA 6.6 0.56 1.3 190 820 NA 2.2 32.6 670 48.1 <0.1 554 1.7 MW-18D 01/05/2016 7.2 47.07 16 1055 1.23 -24 181 1.25 NM <1 19 <50 0.78 NA 2 <1 <1 334 978 NA 1.64 21.9 629 39 <0.2 610 1.1 MW-18D 06/23/2016 7.1 44.72 17 945 2.13 -97 109 6.43 0.5 <1 37 <50 11.2 NA 19.5 <1 <1 456 1040 0.207 1.25 27.5 767 37 <0.2 640 1.33 Transition Zone ABMW-51) 06/09/2015 7.1 44.88 18 442 0.1 -136 69 7.89 NM <1 144 2200 NA NA <1 1.06 <1 30600 5970 NA <1 8.47 421 <0.1 <0.2 210 0.487 ABMW-SD 06/30/2015 7.1 45.40 19 451 0.36 231 436 9.87 NM NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-SD 09/15/2015 7.6 47.42 19 465 0.13 -224 -19 9.98 3 <1 156 2200 NA NA <1 <1 <1 30000 5880 NA <1 10.2 487 0.13 <0.2 200 0.576 ABMW-5D 12/03/2015 6.9 44.61 11 441 0.92 -126 79 19.84 3 <1 138 2080 <0.03 NA <1 <1 <1 25300 4970 NA <1 12.4 461 <0.1 <0.2 200 0.406 ABMW-5D 01/06/2016 7.4 45.35 12 442 0.5 -189 16 19.4 2 1.24 147 2160 <0.03 NA 1.03 <1 <1 30000 5690 NA <1 12.5 464 <0.1 <0.2 220 0.556 CW-2 11/29/2010 7.4 13.77 12 698 NM NM NM 2.12 NM <0.5 62.4 <50 NA NA <5 NA <5 55.3 52.9 0.17 <10 NA NA 51.8 <0.1 408 NA CW-2 11/06/2012 6.9 14.41 13 574 2.23 128 333 24.5 NM <0.5 77.1 <50 NA NA <5 NA <5 1030 10.3 0.25 <10 NA NA 91.2 <0.1 385 NA CW-2 07/08/2013 7.0 13.30 20 833 4.06 143 348 3.56 NM <1 98 <50 NA NA <5 NA <5 173 <5 0.34 <1 NA NA 47 <0.2 520 NA CW-2 11/11/2013 6.8 14.41 17 721 4.2 203 408 8 NM <1 98 <50 NA NA <5 NA <5 1190 14 0.25 <1 NA NA 57 <0.2 460 NA CW-2 04/04/2014 7.1 12.94 16 725 5.7 298 503 22 NM <1 97 <50 NA NA <5 NA <5 1070 13 0.26 <1 NA NA 57 <0.2 490 NA CW-2 07/15/2014 6.8 14.15 21 799 3.2 173 378 8.8 NM <1 103 <50 NA NA <5 NA <5 337 <5 0.26 <1 NA NA 58 <0.2 Soo NA CW-2 07/08/2015 7.1 13.53 20 726 3.7 107 312 9.77 NM <1 94 <50 NA NA <5 <1 <5 188 <5 1.1 <1 78.5 NA 66 <0.2 450 31.6 CW-2 09/15/2015 6.9 15.04 21 691 2.9 54 259 16.2 0 <1 90 <50 NA NA <1 <1 <1 368 <5 NA <1 66.9 334 77 <0.2 430 37.2 CW-2 11/05/2015 6.0 13.43 18 2 9.5 21 206 1.22 NM <1 83 <50 NA NA <5 <1 <5 47 <5 1.1 <1 70.2 332 79 <0.2 430 33.7 CW-2 04/07/2016 7.0 12.70 14 715 4.32 132 337 2.19 NM <1 92 <50 NA NA <5 <1 <5 125 <5 1.1 <1 85.9 342 70 <0.2 430 32.2 CW-3 11/30/2010 6.9 5.25 14 1075 NM NM NM 9.76 NM <0.5 189 <50 NA NA <5 NA <5 178 7.2 0.58 <10 NA NA 112 <0.1 639 NA CW-3 04/19/2011 5.9 4.01 17 308 0.63 -33 172 12.7 NM <0.5 77.1 <50 NA NA <5 NA <5 716 12.5 <0.1 <10 NA NA 38.4 <0.1 210 NA CW-3 07/13/2011 6.4 5.22 22 1000 2.3 -107 98 1.03 NM <0.5 170 b <50 NA NA <5 NA <5 <50 <5 0.59 <10 NA NA 90.1 <0.1 570 NA CW-3 DUP 07/13/2011 6.4 5.22 22 1000 2.3 -107 98 1.03 NM <0.5 172 b <50 NA NA <5 NA <5 <50 <5 0.59 <10 NA NA 89.5 <0.1 548 NA CW-3 11/02/2011 6.8 5.16 18 980 2.41 -85 120 0.98 NM <0.5 184 <50 NA NA <5 NA <5 <50 <5 0.61 <10 NA NA 91.9 <0.1 644 NA CW-3 04/02/2012 6.3 4.57 15 287 0.34 -51 154 8.84 NM <0.5 78.2 <50 NA NA <5 NA <5 481 11.7 <0.2 <10 NA NA 73.8 <0.1 211 NA CW-3 07/11/2012 6.5 5.55 18 955 2.78 -39 166 0.88 NM <0.5 161 <50 NA NA <5 NA <5 <50 <5 0.57 <10 NA NA 104 <0.1 614 NA P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-2 Transition Zone GW Exceedances.xlsx Page 1 of 3 TABLE 1-2 TRANSITION ZONE GROUNDWATER EXCEEDANCES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Barium Boron Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Iron Manganese Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs mg/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/l mg/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 700 700 0.07A 0.07A 10 1* 1000 300 50 10 20 NE NE 2.50 0.2* 500 0.3* Sample ID Sample Collection Date Field Parameters Analytical Results CW-3 DUP 07/11/2012 6.5 5.55 18 955 2.78 -39 166 0.88 NM <0.5 165 <50 NA NA <5 NA <5 <50 <5 0.58 <10 NA NA 89.1 <0.1 614 NA CW-3 11/07/2012 6.6 5.17 15 990 2.86 68 273 0.39 NM <0.5 178 <50 NA NA <5 NA <5 <50 <5 0.67 <10 NA NA 107 <0.1 652 NA CW-3 04/08/2013 5.6 4.09 15 110 1.98 39 244 34.9 NM <1 29 <50 NA NA <5 NA <5 441 6 <0.023 <1 NA NA 19 <0.2 120 NA CW-3 07/08/2013 6.5 5.00 21 958 2.99 165 370 1.51 NM <1 160 <50 NA NA <S NA <5 26 <5 0.62 <1 NA NA 85 <0.2 590 NA CW-3 11/11/2013 6.4 5.54 17 987 3.2 204 409 2.7 NM <1 163 <50 NA NA <5 NA <5 213 7 0.53 <1 NA NA 84 <0.2 620 NA CW-3 04/04/2014 6.0 4.85 12 220 0.6 259 464 15 NM <1 51 <50 NA NA <5 NA <5 1030 <5 0.03 <1 NA NA 32 <0.2 170 NA CW-3 DUP 04/04/2014 6.0 4.85 12 220 0.6 259 464 15 NM <1 50 <50 NA NA <5 NA <5 1030 <5 0.03 <1 NA NA 33 <0.2 170 NA CW-3 07/15/2014 6.5 5.25 21 884 3.38 156 361 0.41 NM <1 147 <50 NA NA <5 NA <5 26 <5 0.54 <1 NA NA 78 <0.2 560 NA CW-3 11/11/2014 6.5 5.19 19 947 2.87 232 437 1.36 NM <1 152 <50 NA NA <5 NA <5 45 <5 0.59 <1 NA NA 85 <0.2 590 NA CW-3 DUP 11/11/2014 6.5 5.19 19 947 2.87 232 437 1.36 NM <1 158 <50 NA NA <5 NA <5 44 <5 0.6 <1 NA NA 85 <0.2 590 NA CW-3 04/16/201S 5.8 4.44 13 137 0.3 283 488 66.5 NM <1 44 <50 NA NA <5 <1 <5 5080 14 <0.023 <1 8.84 NA 22 <0.2 180 NA CW-3 07/08/2015 6.5 4.74 19 886 2.5 140 345 1.31 NM <1 62 <50 1NA NA 1<5 <1 <5 152 33 2.6 <1 19.9 NA 75 <0.2 540 3.62 CW-3 DUP 07/08/2015 6.5 4.74 19 886 2.5 140 345 1.31 NM <1 146 <50 NA NA <5 <1 <5 11 <5 2.6 <1 54 NA 75 <0.2 530 3.14 CW-3 09/15/2015 6.5 5.46 20 916 2.2 99 304 1.95 0 <1 154 <50 NA NA <1 <1 <1 54 <5 NA <1 54.6 495 79 <0.2 530 3.92 CW-3 11/04/2015 6.5 4.78 18 516 0.4 -47 158 38.7 NM <1 98 <50 NA NA <5 <1 <5 3310 11 0.97 <1 32.2 282 49 <0.2 370 12.6 CW-3 DUP 11/04/2015 6.5 4.78 18 516 0.4 -47 158 38.7 NM <1 97 <50 NA NA <5 <1 <5 3380 9 0.98 <1 32.1 278 49 <0.2 360 11.7 CW-3 04/07/2016 6.1 5.10 13 420 0.56 193 398 2.63 NM <1 94 <50 NA NA <5 <1 <5 165 <5 0.32 <1 27.3 261 50 <0.2 250 1.46 CW-4 11/30/2010 7.1 28.97 20 599 NM NM NM 8.97 NM <0.5 137 <50 NA NA 29.6 NA 7.3 325 19.9 0.43 <10 NA NA 33.2 <0.1 345 NA CW-4 04/19/2011 6.6 28.63 20 567 2.46 0 205 8.4 NM <0.5 143 <50 NA NA 18.9 NA 6.7 321 11.7 0.59 <10 NA NA 33.4 <0.1 404 NA CW-4 07/13/2011 6.7 29.34 24 589 3.06 -133 72 8.66 NM <0.5 146 b <50 NA NA 22.9 NA <5 391 b 11.9 b 0.46 <10 NA NA 37.6 b <0.1 325 b NA CW-4 11/02/2011 7.0 29.31 18 581 2.45 -41 164 9.31 NM <0.5 136 <50 NA NA <5 NA <5 <50 <5 0.4 <10 NA NA 36.3 <0.1 612 NA CW-4 07/09/2015 6.6 28.62 20 601 1.9 159 364 0.57 NM <1 136 <50 NA 0.284 <5 <1 <5 18 <5 1.9 <1 44.7 NA 37 <0.2 370 2.48 CW-4 09/15/2015 6.7 29.47 18 627 1.5 108 313 3.28 0 <1 136 <50 NA NA <1 <1 <1 76 <5 NA <1 43.4 196 39 <0.2 340 2.48 CW-4 11/04/2015 6.9 29.10 18 576 1.6 -65 140 1.78 NM <1 131 1 <50 NA NA <5 <1 <5 49 <5 1.7 <1 44.1 192 39 <0.2 380 2.17 CW-4 12/04/2015 6.8 28.87 16 536 1.65 37 242 0.58 0 <1 128 <50 0.35 NA <1 <1 <1 <10 <5 NA <1 46 191 36 <0.2 320 2.06 CW-4 01/05/2016 7.1 28.67 12 521 2.11 36 241 3.67 0 <1 131 <50 0.29 NA <1 <1 <1 29 <5 NA <1 46 189 36 <0.2 360 2.07 CW-4 04/07/2016 6.8 28.44 15 583 1.68 176 381 2.28 NM <1 132 <50 NA NA <5 <1 <5 89 <5 2 <1 44.3 194 38 <0.2 340 2.24 CW-5 11/29/2010 6.7 9.92 15 1655 NM NM NM 6.11 NM <0.5 44 413 NA NA <5 NA <5 61.1 42.3 <0.1 <10 NA NA 873 <0.1 1530 NA CW-5 07/13/2011 6.4 11.96 22 1066 2.69 -135 70 2.92 NM <0.5 20.3 b 424 NA NA <S NA <5 <50 <5 <0.2 <10 NA NA 472 <0.1 856 NA CW-5 11/02/2011 6.6 11.06 18 1132 4.38 -50 155 1.2 NM <0.5 31.5 467 NA NA <5 NA <5 60.2 <5 <0.2 <10 NA NA 668 <0.1 1150 NA CW-5 04/02/2012 6.6 9.28 15 343 8.14 -38 167 1.96 NM <0.5 38.2 207 NA NA 5.2 NA <5 127 <5 0.26 <10 NA NA 296 <0.1 616 NA CW-5 07/11/2012 6.6 13.15 19 828 3.05 -51 154 1.14 NM <0.5 14.3 543 NA NA <5 NA <5 74.6 <5 0.34 <10 NA NA 339 <0.1 670 NA CW-5 11/07/2012 6.5 10.94 17 1193 4.3 122 327 0.75 NM <0.5 28.6 477 NA NA <5 NA <5 <50 <5 0.35 <10 NA NA 662 <0.1 1290 NA CW-5 04/09/2013 6.4 9.52 19 999 5.43 23 228 4.26 NM <1 31 295 NA NA <5 NA <5 12 <5 0.16 <1 NA NA 490 <0.2 900 NA CW-5 07/08/2013 6.4 9.69 20 1105 4.46 154 359 0.9 NM <1 29 357 NA NA <5 NA <5 19 <5 1.8 <1 NA NA 640 <0.2 1000 NA CW-5 DUP 07/08/2013 6.4 9.69 20 1105 4.46 154 359 0.9 NM <1 30 360 NA NA <S NA <5 30 <5 1.7 <1 NA NA 640 <0.2 1100 NA CW-5 11/11/2013 6.4 12.38 16 1377 5.5 210 415 2.4 NM <1 26 497 NA NA <5 NA <5 60 <5 0.21 <1 NA NA 700 <0.2 1200 NA CW-5 07/15/2014 6.4 12.14 19 840 3.86 170 375 3.91 NM <1 18 476 NA NA <5 NA <5 84 <5 0.31 <1 NA NA 330 <0.2 670 NA CW-5 11/11/2014 6.5 11.17 17 744 4.51 234 439 4.13 NM <1 28 356 NA NA <5 NA <5 197 <5 0.9 <1 NA NA 300 <0.2 600 NA CW-5 04/16/2015 6.5 9.07 14 1004 4.5 385 590 1.37 NM <1 38 245 NA NA <5 <1 <5 19 <5 1.2 <1 36.6 NA 410 <0.2 840 NA CW-5 07/08/2015 6.6 10.35 20 640 4.2 93 298 3.35 NM <1 32 302 NA NA <5 <1 <5 24 <5 5.8 <1 29.8 NA 250 <0.2 520 28.7 CW-5 09/15/2015 6.4 13.88 22 777 1.5 73 278 3.37 0 <1 22 641 NA NA <1 <1 <1 97 <5 NA <1 32.8 291 290 <0.2 570 18.4 CW-5 11/04/2015 6.9 10.29 18 586 4.4 37 242 0.39 NM <1 32 349 NA NA <5 <1 <5 <10 <5 5.4 <1 28.1 297 200 <0.2 540 28.4 CW-5 04/07/2016 6.6 8.69 14 358 6.64 150 355 0.6 NM <1 47 140 NA NA <5 <1 <5 15 <5 5 <1 24.7 216 160 <0.2 390 30.9 GMW-6 12/19/2002 6.8 24.94 NM 1975 NM NM NM NM NM NA 74 NA NA NA 10 NA 10 4240 1660 0.91 96 NA NA 1108 NA 2050 NA GMW-6 05/28/2003 6.4 21.34 NM 2040 NM NM NM NM NM NA 68 NA NA NA 6 NA 5 1750 609 0.94 101 NA NA 830 NA 1930 NA GMW-6 11/12/2003 NM NM NM 1990 NM NM NM NM NM NA 355 NA NA NA 160 NA 111 59100 2330 1.12 93 NA NA 859 NA 1760 NA GMW-6 05/20/2004 NM NM NM <10 NM NM NM NM NM NA 51 NA NA NA <S NA 8 1950 169 1.17 105 NA NA 586 NA 1550 NA GMW-6 11/17/2004 6.4 25.45 NM 1700 NM NM NM NM NM NA 106 NA NA NA 28 NA 27 13100 372 1.53 94 NA NA 454 NA 1420 NA GMW-6 05/18/2005 6.4 23.16 NM 1620 NM NM NM NM NM NA 63 NA NA NA 11 NA 12 6950 166 1.21 88 NA NA 589 NA 1600 NA GMW-6 11/16/2005 6.2 27.10 NM 1550 NM NM NM NM NM NA 54 NA NA NA 10 NA 6 2240 81 1.27 96 NA NA 554 NA 1200 NA GMW-6 05/22/2006 5.8 27.20 NM 1950 NM NM NM NM NM NA 309 NA NA NA 5 NA 3 1600 51 1.04 86 NA NA 627 NA 1400 NA GMW-6 11/15/2006 7.4 24.91 NM 2140 NM NM NM NM NM NA 70 NA NA NA 10 NA 12 4230 236 1.01 98 NA NA 438 NA 1570 NA GMW-6 05/23/2007 6.4 27.40 NM 1440 NM NM NM NM NM NA 304 NA NA NA 12 NA 7 1870 86 1.15 81 NA NA 666 NA 1.600 NA GMW-6 11/06/2007 6.4 27.40 NM 1990 NM NM NM NM NM NA 845 NA NA NA 10 NA 8 2440 60 0.92 76 NA NA 587 NA 1510 NA P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-2 Transition Zone GW Exceedances.xlsx Page 2 of 3 TABLE 1-2 TRANSITION ZONE GROUNDWATER EXCEEDANCES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Barium Boron Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Iron Manganese Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs 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 mg/I ug/I mg/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 700 700 0.07- 0.07- 10 1* 1000 300 50 30 20 NE NE 2.50 0.2* 500 0.3* Sample IO Sample Collection Date Field Parameters Analytical Results GMW-6 05/22/2008 6.4 27.10 NM 2000 NM NM NM NM NM NA 59.2 NA NA NA <2 NA 1.6 3230 82.8 0.84 71.2 NA NA 830 NA 1700 NA GMW-6 11/19/2008 6.5 27.94 NM 2100 NM NM NM NM NM NA 47.9 NA NA NA <1 NA <1.6 1240 46.4 0.66 74.4 NA NA 880 NA 1800 NA GMW-6 05/07/2009 6.8 25.18 NM 2000 NM NM NM NM NM NA 55.9 3820 NA NA 5.5 NA <0.81 2220 55.6 0.78 68.1 NA NA 810 5.2 1800 NA GMW-6 11/10/2009 6.5 25.65 NM 1900 NM NM NM NM NM NA 33.7 2850 NA NA 6.5 NA <1.6 680 22.7 0.83 56.6 NA NA 690 <4.8 1600 NA GMW-6 05/26/2010 6.5 23.52 NM 1970 NM NM NM NM NM NA 39.4 3920 NA NA 2.6 NA 4700 861 25 0.85 61 NA NA 709 <3 1640 NA GMW-6 11/16/2010 7.1 23.04 17 1782 NM NM NM 19.3 NM NA 43.5 2620 NA NA 5.6 NA 3.9 429 46.4 2.3 73.2 NA NA 624 <10 1420 NA GMW-6 04/19/2011 6.6 21.30 18 1603 4.97 22 227 3.59 NM NA 49.7 962 NA NA 6.2 NA 1.2 64.9 4.4 1.4 59.9 NA NA 473 <0.1 1250 NA GMW-6 11/01/2011 6.7 23.86 13 1463 1.27 7 212 2.09 NM NA 56.4 762 NA NA <5 NA <5 62.9 6.6 1 60.4 NA NA 458 <0.1 1240 NA GMW-6 04/03/2012 6.5 21.76 18 1173 2.96 -64 141 1.49 NM NA 36.8 2380 NA NA 2.7 j,b NA 1.7 j,b <50 6.1 0.86 85 NA NA <5 0.061 j,b 1400 NA GMW-6 DUP 04/03/2012 6.5 21.76 18 1173 2.96 -64 141 1.49 NM NA 37 2460 NA NA 3j,b NA 1.5 j,b <50 6.2 0.87 82.8 NA NA 531 0.069 j,b 1280 NA GMW-6 11/07/2012 6.4 23.97 15 1375 1.47 168 373 1.5 NM NA 48.5 1160 NA NA 2.1 j,b NA 1.4 j,b <50 4.9 j,b 0.92 62.8 NA NA 580 <0.1 1380 NA GMW-6 04/09/2013 6.7 21.63 22 1652 4.14 11 216 1.26 NM NA 47 1260 NA NA <5 NA <5 <10 <5 0.63 77.3 NA NA 570 <0.2 1200 NA GMW-6 11/12/2013 6.7 23.53 16 1578 0.8 283 488 2.7 NM NA 48 1420 NA NA <5 NA <5 16 <5 0.89 82.4 NA NA 560 <0.2 1300 NA GMW-6 04/03/2014 6.7 20.14 16 1593 5.2 299 504 0.6 NM NA 43 1450 NA NA <5 NA <5 <10 <5 0.82 82.1 NA NA 420 <0.2 1400 NA GMW-6 11/10/2014 6.5 21.90 15 1318 0.73 ill 316 1.35 NM NA 45 1160 NA NA <5 NA <5 <10 <5 0.93 77.3 NA NA 490 <0.2 1100 NA GMW-6 04/21/2015 6.6 19.42 19 1596 1.8 169 374 2.17 NM NA 38 1870 NA NA <5 NA <5 <10 <5 0.8 89.7 NA NA 540 <0.2 1200 NA GMW-6 07/01/2015 6.4 21.55 18 1552 0.79 13 361 2.48 NM NA NA NA NA 0.545 NA NA NA NA NA NA NA NA NA NA NA NA NA GMW-6 DUP 07/01/2015 6.4 21.55 18 1552 0.79 13 361 2.48 NM NA NA NA NA 0.542 NA NA NA NA NA NA NA NA NA NA NA NA NA GMW-6 09/14/2015 6.5 24.11 21 1563 1 102 307 3.97 0 <1 32 2460 NA NA <1 <1 <1 25 7 NA 94.3 102 1110 580 <0.2 1300 4.17 GMW-6 11/04/2015 6.4 22.00 17 1507 1.42 81 286 0.12 NM NA 50.5 876 NA NA 1.14j NA <1 SAS 1.31j 5.6 N1 73.2 NA NA 378 <0.133 1080 NA GMW-6 04/06/2016 6.9 20.62 16 1487 5.15 C 89 294 1.32 NM NA 54 736 NA NA <5 NA <5 3.01j 1.26j NA 68.3 NA NA 385 0.215 1140 NA MW-5D 05/27/2015 6.5 10.17 22 1476 1.08 71 276 1.2 0 <1 95 864 NA NA <1 1.46 <1 26 540 NA <1 94.6 704 680 <0.2 370 3.8 MW-5D 06/25/2015 6.6 9.90 21 1405 0.6 15 220 3.33 NM NA NA NA NA 0.015 NA NA NA NA NA NA NA NA NA NA NA NA NA MW-5D 09/13/2015 6.0 15.38 18 1191 0.6 93 298 2.07 0 <1 50 957 NA NA <1 <1 <1 97 203 NA <1 7.01 497 540 <0.2 1000 10 MW-5D 12/04/2015 6.8 8.60 12 1074 4.1 84 289 0.7 0 <1 39 936 2 NA 2.16 <1 <1 12 47 NA <1 6.16 451 500 <0.2 850 8.61 MW-5D 01/05/2016 7.1 8.06 6 1130 2.2 84 289 1 0 <1 41 950 0.15 NA <1 <1 <1 <10 57 NA <1 87.8 440 470 <0.2 900 9.23 MW-6D 05/29/2015 6.6 7.01 19 409 2.8 126 331 5.6 0 <1 9 <50 NA NA <1 <1 <1 122 41 NA <1 13.7 195 56 <0.2 260 5.16 MW-6D 06/25/2015 6.5 6.59 20 386 0.4 272 477 1.77 NM NA NA NA NA 0.161 NA NA NA NA NA NA NA NA NA NA NA NA NA MW-6D 09/13/2015 6.4 8.12 22 396 0.3 49 254 1.3 0 <1 7 <50 NA NA <1 <1 <1 19 10 NA <1 12.9 197 54 <0.2 250 6.01 MW-22D 06/20/2016 6.5 16.73 17 2175 1.51 43 248 8.04 0 <1 52 377 <0.03 NA <1 3.14 1.11 320 1250 0.939 416 48.2 1600 1400 <0.2 2200 3.79 B2 Prepared by: BER Checked by: COE Notes: = - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. Spec Cord = Specific Conductance Deg C = Degrees Celsius NTU = Nephelometric turbidity unit NM = Not measured DUP = Duplicate umhos/cm = Micro mhos per centimeter NE = Not established Temp = Temperature S.U. = Standard Unit mg/I = Milligram per liter DO = Dissolved oxygen ft = Feet mV = Millivolts ORP = Oxidation -Reduction Potential NA = Not analyzed ug/I = Microgram per liter Eh = Redox Potential < = 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. b = Target analyte detected in method blank 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. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. z = Result is greater than the associated high calibration standard. Result is estimated. = NC DHHS Health Screening Level C = Associated midday/end of day field parameter calibration not within range. NI = Nitrate analyzed on 11/5/15, but LCS and CCV recoveries were above the control limits (111%, 113%). Samples were re -analyzed on 11/6/15, but past the recommended 48-hour holding time. The original data from 11/5/15 is reported, with a possible high bias. M6 = Matrix spike and matrix spike duplicate recovery not evaluated against control limits due to sample dilution. P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-2 Transition Zone GW Exceedances.xlsx Page 3 of 3 TABLE 1-3 BEDROCK GROUNDWATER EXCEEDANCES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter pN Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUS mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I ug/I SSA NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* SO 700 4* 700 2 250 0.07^ 0.07^ 10 1* 1000 2 300 15 50 100 20 NE NE 250 0.2* Soo 0.3* 1000 Sample ID SamCollectionpleDate Field Parameters Analytical Results Background BG-1BR 06/10/2015 6.8 39.69 18 562 0.5 -63 142 8.4 NM <1 <1 21 <1 <50 <1 15 NA NA <1 1.44 <1 NA 225 <1 690 1.86 <1 36.4 183 28 <0.2 350 1.94 44 BG-1BR 09/12/2015 7.0 40.52 19 490 0.9 93 298 2.3 0.5 <1 <1 27 <1 <50 <1 13 NA NA <1 <1 <1 NA 374 <1 614 1.3 <1 24.6 160 20 <0.2 300 0.425 23 BG-1BR 12/05/2015 6.8 40.51 15 496 0.25 9 214 5.83 0 <0.5 <0.5 30 <0.2 <50 <0.08 11.7 <0.03 NA 0.71 <0.5 <1 NA 380 <0.1 420 1 <0.5 23 160 15 <0.1 297 <1 <10 BG-1BR 01/05/2016 6.8 39.96 14 469 0.35 66 271 7.91 0 <1 <1 33 <1 <50 <1 12 <0.03 NA 1.96 <1 <1 NA 375 <1 445 2.1 <1 21.9 163 21 <0.2 330 1.25 51 BG-1BR 04/07/2016 6.9 38.06 17 473 0.17 9 214 9.86 NM <1 <1 29 <1 <50 <1 13 0.035 NA <1 <1 <1 NA 139 <1 398 1.45 <1 23.5 166 20 <0.2 300 1.23 6 MW-10BR 05/27/2015 7.1 22.58 19 569 1.8 111 316 2.5 NM <1 <1 93 <1 <50 <1 17 NA NA <1 8.2 4.67 NA 33 <1 478 2.44 <1 36.5 194 40 <0.2 350 2.09 <5 MW-10BR 06/29/2015 7.3 22.79 18 581 2.02 298 503 4.01 NM NA NA NA NA NA NA NA NA 0.064 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10BR 09/12/2015 7.0 1 24.26 18 619 0.3 91 296 1.18 0 <1 <1 107 <1 <50 <1 16 NA NA <1 5.97 <1 NA 46 <1 840 <1 <1 37.6 201 40 <0.2 350 1.34 <5 MW-10BR 12/04/2015 7.1 23.80 14 570 0.34 129 334 0.65 0 <1 <1 107 <1 <50 <1 17 <0.03 NA <1 5.15 <1 NA 65 <1 811 <1 <1 37.5 196 41 <0.2 330 1.3 <5 MW-10BR DUP 12/04/2015 7.1 23.80 14 570 0.34 129 334 0.65 0 <1 <1 102 <1 <50 <1 17 <0.03 NA <1 5.16 <1 NA 75 <1 656 <1 <1 37.3 190 39 <0.2 320 1.38 <5 MW-10BR 01/06/2016 6.8 23.31 12 567 0.48 24 229 0.61 0 <1 <1 120 <1 <50 <1 18 <0.03 NA <1 6.38 <1 NA 87 <1 752 <1 <1 36.7 196 42 <0.2 370 1.28 <5 MW-10BR 04/07/2016 7.0 22.14 16 583 0.34 145 350 0.39 NM <1 <1 112 <1 <50 <1 18 <0.03 NA <1 6.45 <1 NA 91 <1 481 <1 <1 37.2 181 41 <0.2 330 1.51 51 MW-13BR 05/30/2015 6.2 40.15 18 645 0.3 -141 64 3.5 2.5 <1 <1 323 <1 <50 <1 84 NA NA <1 3.97 <1 NA 4000 <1 1140 1.22 <1 35.6 409 30 <0.2 380 0.364 15 MW-13BR DUP 05/30/2015 6.2 40.15 18 645 0.3 -141 64 3.5 2.5 <1 <1 329 <1 <50 <1 84 NA NA <1 3.44 <1 NA 3320 <1 969 1.3 <1 35.2 416 30 <0.2 48 0.455 27 MW-13BR 09/13/2015 7.1 40.70 21 604 0.3 -85 120 6.07 2.5 <1 1.06 309 <1 <50 <1 76 NA NA <1 3.71 <1 NA 4130 <1 1080 1.06 <1 35.9 411 18 <0.2 370 0.819 101 MW-13BR 12/05/2015 6.5 40.25 15 587 0.36 -78 127 3.33 5 <0.5 1.3 330 <0.2 <50 <0.08 77.5 <0.03 NA <0.5 4.2 <1 NA 5900 <0.1 1300 0.78 <0.5 35.8 410 16.7 <0.1 390 <1 <10 MW-13BR 01/06/2016 6.2 39.95 10 590 0.57 -56 149 2.15 2.5 <1 1.06 349 <1 <50 <1 93 <0.03 NA <1 5.31 <1 NA 6080 <1 1200 1.07 <1 39.8 416 29 <0.2 420 0.398 32 MW-13BR DUP 01/06/2016 6.2 39.95 10 590 0.57 -56 149 2.15 2.5 <1 1.12 349 <1 <50 <1 92 <0.03 NA <1 5.5 <1 NA 6140 <1 1220 1.13 <1 34.9 417 29 <0.2 410 0.386 31 MW-13BR 04/07/2016 6.1 39.40 17 626 0.31 -48 157 2.2 NM <1 <1 380 <1 <50 <1 100 <0.03 NA <1 5.8 <1 NA 5030 <1 803 1.25 <1 36.8 427 33 <0.2 400 0.347 <5 MW-14BR 06/10/2015 7.0 48.49 20 662 0.8 -128 245 4 NM <1 <1 32 <1 <50 <1 40 NA NA <1 1.1 1.69 NA 898 <1 328 <1 <1 22 165 15 <0.2 370 0.444 54 MW-14BR DUP 06/10/2015 7.0 48.49 20 662 0.8 -128 209 4 NM <1 <1 33 <1 <50 <1 41 NA NA <1 1.12 2.21 NA 871 <1 328 <1 <1 23 167 15 <0.2 360 0.465 62 MW-14BR 09/12/2015 7.4 49.47 18 638 0.1 -77 128 29.1 1.5 <1 <1 37 <1 <50 <1 40 NA NA 165 1.86 6.52 NA 2990 <1 395 84.7 <1 22.4 169 13 <0.2 370 1.84 23 MW-14BR 12/06/2015 7.1 50.32 15 631 0.48 -106 99 6.28 3 <0.5 <0.5 34 <0.2 <50 <0.08 41.9 <0.03 NA 2.8 0.94 1.9 NA 2200 <0.1 340 2.5 <0.5 25.4 180 11.3 <0.1 358 <1 17 MW-14BR 01/06/2016 7.0 49.95 7 618 0.88 70 275 6.18 0.5 <1 <1 38 <1 <50 <1 43 <0.03 NA 1.98 1.25 2.16 NA 1780 <1 291 1.8 <1 22.1 175 12 <0.2 390 0.362 45 MW-14BR 04/08/2016 7.2 47.00 16 630 0.52 -115 90 8.75 NM <1 <1 32 <1 <50 <1 41 <0.03 Al NA 2.11 1.86 <1 NA 1160 <1 286 2.72 <1 22.2 159 13 <0.2 380 <0.3 5 MW-15BR 06/16/2015 7.6 9.61 24 564 0.4 -163 253 10.4 <0.5 <1 <1 19 <1 <50 <1 34 NA NA <1 <1 <1 NA 541 <1 36 1.39 <1 25.1 142 30 <0.2 340 0.503 38 MW-15BR 09/12/2015 8.3 11.66 21 497 0.5 -159 46 3 0 <1 <1 19 <1 <50 <1 34 NA NA <1 <1 <1 NA 456 <1 30 1.42 <1 32.9 110 26 <0.2 300 0.369 <5 MW-15BR 12/05/2015 8.2 9.05 14 430 0.27 -153 52 2.19 0 <0.5 0.59 15 <0.2 <50 <0.08 33.2 <0.03 NA <0.5 <0.5 <1 NA 230 <0.1 19 0.61 <0.5 36.1 90 19.7 <0.1 231 <1 <10 MW-15BR 01/05/2016 7.6 7.74 10 429 0.49 50 255 2.26 0 <1 <1 16 <1 <50 <1 34 <0.03 NA <1 <1 <1 NA 262 <1 10 <1 <1 35.3 92 22 <0.2 280 <0.3 <5 MW-15BR 04/07/2016 7.7 7.65 16 481 0.34 -199 6 7.3 NM <1 <1 18 <1 <50 <1 37 <0.03 NA 1.01 <1 <1 NA 637 <1 29 1.24 <1 34.1 72 25 <0.2 300 0.441 <5 MW-16BR 05/27/2015 7.0 30.14 19 504 0.5 -61 144 1 NM <1 <1 64 <1 <50 <1 12 NA NA <1 <1 <1 NA 106 <1 272 1.13 <1 18.8 166 26 <0.2 310 2.1 <5 MW-16BR 06/30/2015 6.9 30.46 19 508 1.91 309 514 7.29 NM NA NA NA NA NA NA NA NA 0.135 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-16BR 09/13/2015 6.9 31.97 18 532 0.3 0 205 3.92 0.5 <1 <1 69 <1 <50 <1 13 NA NA <1 <1 1.26 NA 275 <1 182 1.38 <1 19.1 174 28 <0.2 320 1.83 <5 MW-16BR 12/05/2015 6.9 31.59 17 500 0.54 37 242 3.88 0 <0.5 <0.5 76 <0.2 <50 <0.08 11.9 0.074 NA 1.1 <0.5 2.3 NA 170 0.11 170 1.5 <0.5 19.2 170 23.5 <0.1 293 2.5 <10 MW-16BR 01/06/2016 6.7 30.73 13 484 0.59 105 310 2.8 0 <1 <1 75 <1 <50 <1 13 0.099 NA <1 <1 1.28 NA 116 <1 138 1.22 <1 18.5 171 26 <0.2 310 3.08 <5 MW-17BR 06/16/2015 7.3 37.95 27 640 2 121 235 5.21 0 <1 <1 107 <1 <50 <1 15 NA NA <1 <1 <1 NA 118 <1 354 <1 <1 18.4 960 40 <0.2 370 0.968 18 MW-17BR 09/15/2015 7.2 39.69 23 631 0.6 10 215 6.16 0 <1 <1 110 <1 <50 <1 16 NA NA 1.17 <1 <1 NA 486 <1 328 1.13 <1 17.9 M4 945 41 <0.2 380 2.03 13 MW-17BR 12/06/2015 7.3 38.30 14 604 0.24 -52 153 9.87 <0.5 <0.5 <0.5 100 <0.2 <50 <0.08 15 <0.03 NA 2.2 <0.5 <1 NA 750 <0.1 320 1.7 <0.5 22.9 890 38.8 <0.1 370 <1 16 MW-17BR 01/06/2016 7.2 37.74 14 591 0.28 16 221 5.13 0.75 <1 <1 100 <1 <50 <1 15 <0.03 NA <1 <1 <1 NA 756 <1 359 <1 <1 18.5 917 39 <0.2 380 0.454 15 MW-17BR 04/08/2016 7.3 37.60 15 616 0.12 -158 47 9.94 NM <1 <1 97 <1 <50 <1 14 <0.03 NA 21.6 <1 1.18 NA 694 <1 341 12.2 <1 18.8 887 39 <0.2 390 0.658 45 MW-18BR 06/02/2015 7.5 46.22 18 784 0.4 -232 -27 9.6 0 <1 <1 77 <1 <50 <1 120 NA NA <1 20.1 <1 NA 95 <1 789 <1 <1 19 224 16 <0.2 530 0.931 36 MW-18BR 06/29/2015 8.0 46.29 18 802 1.26 22 227 4.33 NM NA NA NA NA NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-18BR 09/14/2015 8.0 47.15 18 739 0.3 -200 5 6.55 0 <1 <1 52 <1 <50 <1 130 NA NA 2.23 1.03 <1 NA 363 <1 475 <1 <1 20 209 3.7 <0.2 540 <0.3 <5 MW-18BR 12/05/2015 7.9 47.52 15 746 0.13 -190 15 7.64 1 <0.5 <0.5 49 <0.2 <50 <0.08 124 <0.03 NA 0.99 1.9 <1 NA 1000 <0.1 660 0.7 <0.5 19 230 1.5 <0.1 413 <1 <10 MW-18BR 01/05/2016 7.6 47.05 14 757 0.22 -127 78 5.56 1 <1 <1 62 <1 <50 <1 120 <0.03 NA 4.24 1.63 <1 NA 1260 <1 874 2.11 <1 18.8 232 5 <0.2 530 <0.3 7 MW-18BR 04/08/2016 8.3 45.44 14 765 0.18 30 235 4.68 NM <1 <1 51 <1 <50 <1 120 <0.03 NA <1 <1 <1 NA 1060 <1 819 <1 <1 20.3 213 11 <0.2 480 <0.3 <5 MW-18BR DUP 04/08/2016 8.3 45.44 14 765 0.18 30 235 4.68 NM <1 <1 51 <1 <50 <1 120 <0.03 NA <1 <1 <1 NA 1050 <1 815 <1 <1 20.6 214 11 <0.2 490 <0.3 <5 Bedrock ABMW-1BR 05/28/2015 6.9 7.76 19 532 0.31 -154 51 2.6 1.25 <1 <1 32 <1 176 <1 13 NA NA <1 <1 <1 NA 1420 <1 881 1.18 <1 19.5 168 19 <0.2 330 <0.3 <5 ABMW-1BR 06/24/2015 6.8 7.52 21 509 1 -321 -116 2.44 NM NA NA NA NA NA NA NA NA 0.006 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-1BR 09/14/2015 7.4 7.96 22 532 0.5 112 317 3.39 1.5 <1 <1 30 <1 146 <1 13 NA NA <1 <1 <1 NA 1570 <1 938 <1 <1 19.4 169 20 <0.2 350 0.304 <5 ABMW-1BR 12/04/2015 6.8 8.65 16 520 0.5 -153 52 2.4 1.5 <1 <1 31 <1 247 <1 15 <0.03 NA <1 1.74 <1 NA 1600 <1 945 <1 <1 19.7 178 20 <0.2 330 <0.3 <5 ABMW-1BR 01/06/2016 7.1 7.43 12 523 0.7 -98 107 3.11 2 <1 <1 32 <1 255 <1 14 <0.03 NA <1 1.12 <1 NA 1740 <1 944 <1 <1 17.7 176 20 <0.2 350 0.346 <5 ABMW-2BR 05/28/2015 7.9 9.19 21 570 0.1 -239 34 13.2 NM <1 <1 80 <1 <50 <1 27 NA NA 1.01 <1 1.71 NA 93 <1 2130 3.52 <1 25.3 497 73 <0.2 360 2.67 8 ABMW-2BR 06/24/2015 9.5 8.88 21 563 0.6 -268 -63 7.86 NM NA NA NA NA NA NA NA NA 0.011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-2BR 09/14/2015 11.8 9.45 21 790 0.29 -230 -25 7.46 0 <1 <1 290 <1 <50 <1 23 NA NA 5.64 <1 1.24 NA 68 <1 29 1.16 <1 39.7 2740 52 <0.2 360 2.67 <5 ABMW-2BR 12/05/2015 12.1 8.74 15 121 0.51 -166 39 2.68 0 <0.5 0.77 370 <0.2 <50 <0.08 25.4 <0.03 NA 1.9 <0.5 <1 NA 51 <0.1 84 0.99 <0.5 34.5 1700 59.1 <0.1 354 2.1 <10 ABMW-2BR 01/06/2016 11.4 8.60 13 1001 3.35 -31 174 9.89 0 <1 <1 280 <1 <50 <1 31 <0.03 NA 1.41 <1 <1 NA 262 <1 868 <1 <1 27 958 90 <0.2 340 1.44 <5 ABMW-3BR 05/26/2015 5.9 23.90 24 4154 0.48 41 246 8.4 <0.5 <1 1.19 51 3.66 4060 <1 13 NA NA 1.94 369 5.08 NA 6720 <1 18800 385 <1 281 2100 3400 0.721 4300 2.79 109 ABMW-3BR 06/24/2015 5.8 23.77 22 3927 0.5 -39 166 3.17 5.5 NA NA NA NA NA NA NA NA <0.003 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-3BR 09/14/2015 6.0 24.72 19 3798 0.4 105 310 7.64 6 <1 1.66 27 17.3 3850 <1 14 NA NA 1.21 755 1.82 NA 20400 <1 30000 SOS <1 154 2190 3100 <0.2 4100 4.02 641 ABMW-3BRL 06/22/2016 7.9 43.35 20 1117 3.08 -191 14 9.6 0.5 <1 <1 33 <1 132 <1 12 <0.03 NA 6.16 1.48 <1 NA 565 <1 236 3.74 <1 54.5 711 440 <0.2 890 0.573 <5 ABMW-4BR 05/28/2015 6.9 30.98 26 379 0.6 -185 20 9.3 1.5 <1 <1 1 99 <1 <50 <1 8.1 NA NA <1 1.1.4 <1 NA 2180 1 <1 2450 <1 <1 19.8 180 15 <0.2 250 0.391 7 ABMW-4BR 06/30/2015 6.9 32.80 19 413 0.2 -186 19 9.11 NM NA NA NA NA NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-4BR 09/15/2015 7.2 33.29 18 431 0.4 -150 55 8.72 2.6 <1 <1 265 <1 <50 <1 8.2 NA NA <1 <1 <1 NA 13400 <1 4930 <1 <1 19.6 194 2.1 <0.2 220 13= ABMW-4BR 12/03/2015 7.0 31.80 10 403 0.7 122 327 7.12 3.5 <1 <1 213 <1 <50 <1 8.1 <0.03 NA <1 <1 <1 NA 11400 <1 3610 <1 <1 19.8 186 0.88 <0.2 220 P:\Duke Energy Progress. 1026\107, Roxboro Ash Basin GW Assessment P1an\19.EG_CSASUP\Tab1es\Tab1e 1-3 Bedrock GW Exceedances.xlsx Page 1 of 5 TABLE 1-3 BEDROCK GROUNDWATER EXCEEDANCES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter pN Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUS mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* SO 700 4* 700 2 250 0.07^ 0.07^ 10 1* 1000 2 300 15 50 100 20 NE NE 250 0.2* Soo 0.3* 1000 Sample ID Cllection SampleDate o Field Parameters Analytical Results ABMW-4BR 01/07/2016 6.9 29.90 11 433 0.49 18 223 2.96 1.5 <1 <1 146 <1 <50 <1 8.2 <0.03 NA <1 <1 <1 I NA 18600 <1 1 3010 <1 I <1 22.5 1 182 1.4 1 <0.2 230 1 <0.3 12 ABMW-6BR 03/26/2015 7.0 11.50 19 584 0.5 87 292 4.78 0 <1 <1 45 <1 <50 <1 11 NA NA 1.27 1.66 1.18 NA 393 <1 2000 3.04 <1 19.5 247 48 <0.2 220 4.03 <5 ABMW-6BR 06/25/2015 6.9 12.80 20 585 0.9 268 473 8.59 NM NA NA NA NA NA NA NA NA 0.009 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-6BR 09/13/2015 6.9 14.07 19 586 0.4 -28 177 2.96 0 <1 <1 81 <1 <50 <1 8.7 NA NA <1 <1 <1 NA 127 <1 2630 4.68 <1 10.6 206 58 <0.2 350 0.629 <5 ABMW-6BR 12/03/2015 6.7 12.22 16 561 0.41 67 272 0.81 0 <1 <1 60 <1 <50 <1 9.7 <0.03 NA <1 <1 <1 NA 89 <1 2080 2.92 <1 17.2 206 55 <0.2 330 <0.3 <5 ABMW-6BR 01/06/2016 6.8 11.56 14 538 0.31 10 215 2.94 0.5 <1 <1 61 <1 <50 <1 9.8 <0.03 NA <1 <1 <1 NA 167 <1 1710 3.33 <1 19.4 208 58 <0.2 400 0.308 <5 ABMW-7BR 05/27/2015 6.9 14.95 20 690 0.21 -107 98 4.4 NM <1 <1 21 <1 659 <1 13 NA NA <1 <1 <1 NA 305 <1 449 <1 <1 19.1 248 150 <0.2 460 0.628 <5 ABMW-7BR 06/29/2015 6.8 15.04 19 709 0.9 -169 36 1.82 NM NA NA NA NA NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-7BR 09/14/2015 6.9 17.17 21 705 0.5 -93 112 0.15 0.5 <1 <1 18 <1 823 <1 13 NA NA <1 <1 <1 NA 361 <1 455 <1 <1 17.1 246 140 <0.2 480 0.322 <5 ABMW-7BR 12/03/2015 6.9 14.85 15 684 0.45 -143 63 0.53 0 <1 <1 17 <1 884 <1 13 <0.03 NA <1 <1 <1 NA 282 <1 437 <1 <1 16 240 140 <0.2 470 <0.3 <5 ABMW-7BR 01/07/2016 6.7 13.92 12 654 0.7 -61 144 0.89 0.5 <1 <1 17 <1 902 <1 14 <0.03 NA <1 <1 <1 NA 307 <1 432 <1 <1 17 246 150 <0.2 480 <0.3 <5 ABMW-7BRL 06/21/2016 7.1 22.73 21 691 1.09 -118 87 6.09 0.5 <1 1.66 17 <1 245 <1 18 <0.03 NA <1 <1 <1 NA 253 <1 57 <1 <1 44.1 729 140 <0.2 490 0.443 <5 CW-1 11/30/2010 6.9 25.87 15 617 NM NM NM 104 NM <0.5 <5 438 NA <50 0.097 53 NA NA 16.9 NA 20.8 NA 2290 <5 180 10.4 <10 NA NA 67.4 <0.1 392 NA <10 CW-1 04/20/2015 6.3 20.69 19 537 2.8 300 505 4.68 NM <1 <1 71 <1 <50 <1 9.6 NA NA <5 <1 <5 NA 108 <1 13 <5 5.26 60.5 NA 180 0.212 400 NA <5 CW-1 07/08/2015 6.4 22.42 21 506 2.8 127 332 2.78 NM <1 <1 69 <1 <50 <1 11 NA NA <5 <1 <5 NA 168 <1 26 <5 5.17 57.1 NA 160 <0.2 380 20.8 <5 CW-1 09/15/2015 6.2 24.25 20 504 2.5 97 302 2.31 NM <1 <1 69 <1 <50 <1 15 NA NA <1 <1 <1 NA 44 <1 <5 <1 6.47 51.3 261 160 0.737 380 25.4 <5 CW-1 11/05/2015 6.6 24.23 20 503 0.4 5 210 2.1 NM <1 <1 74 <1 <50 <1 14 NA NA <5 <1 <5 NA 37 <1 49 <5 4.94 59.2 276 150 <0.2 400 22.7 <5 CW-1 12/04/2015 6.3 22.96 13 452 0.44 10 215 1.2 4.5 <1 <1 75 <1 <50 <1 13 <0.03 NA <1 2.61 1.76 NA 1840 <1 211 1.72 1.8 58.1 267 140 <0.2 350 19.4 <5 CW-1 01/06/2016 6.5 21.64 8 575 1.6 -71 134 5.6 1.5 <1 <1 82 <1 <50 <1 10 <0.03 NA <1 1.29 1.62 NA 1400 <1 153 <1 <1 71.8 303 170 <0.2 430 14.8 <5 CW-1 04/07/2016 6.4 20.36 18 499 0.31 100 305 28.7 NM <1 <1 94 <1 <50 <1 16 NA NA <5 1.02 11 NA 1160 <1 115 <5 1.59 57.6 283 130 <0.2 350 14.3 <5 CW-2D 11/29/2010 7.0 13.78 18 577 NM NM NM 7.68 NM <0.5 <5 115 NA <50 0.11 14.4 NA NA 18.6 NA 12.8 NA 224 <5 24.9 10.8 <10 NA NA 70.5 <0.1 339 NA 34.3 CW-2D 04/19/2011 6.6 12.70 17 543 2.27 -30 175 9.66 NM <0.5 <5 140 NA <50 <0.08 13.5 NA NA <5 NA <5 NA 382 <5 14.7 <5 <10 NA NA 62.2 <0.1 343 NA <10 CW-2D 09/15/2015 6.8 15.06 17 618 2.3 52 257 4.97 0 <1 <1 153 <1 <50 <1 19 NA NA <1 <1 <1 NA 110 <1 <5 <1 <1 34.3 M4 298 110 <0.2 410 13.5 <5 CW-2D 11/05/2015 6.2 13.43 17 2 10 69 274 1.54 NM <1 <1 174 <1 <50 <1 16 NA NA <5 <1 <5 NA 45 <1 6 <5 <1 37.4 293 100 <0.2 420 11.1 <5 CW-2D 04/07/2016 7.0 12.70 15 628 4.27 133 338 0.56 NM <1 <1 151 <1 <50 <1 19 NA NA <5 <1 <5 NA <10 <1 <5 <5 <1 35 305 120 <0.2 400 12.7 <5 CW-213 DUP 04/07/2016 7.0 12.70 15 628 4.27 133 338 0.56 NM <1 <1 149 <1 <50 <1 19 NA NA <5 <1 <5 NA <10 <1 <5 <5 <1 35.2 309 120 <0.2 400 12.8 <5 CW-3D 11/30/2010 7.8 3.63 16 588 NM NM NM 8.69 NM <0.5 <5 33.2 NA <50 <0.08 28.6 NA NA <5 NA <5 NA 90.4 <5 116 <5 <10 NA NA 28.7 <0.1 353 NA <10 CW-3D 04/19/2011 7.5 1.11 19 510 2.68 -31 174 2.1 NM 0.65 <5 38.1 NA <50 <0.08 27.2 NA NA <5 NA <5 NA 53.6 <5 86.6 <5 <10 NA NA 31.2 <0.1 237 NA <10 CW-3D 07/13/2011 7.5 3.00 23 544 0.52 -150 55 0.92 NM <0.5 <5 52.1 b NA <50 <0.08 26.4 b NA NA <5 NA <5 NA 456 b <5 325 <5 <10 NA NA 29.5 b <0.1 329 b NA <10 CW-3D 11/02/2011 7.7 2.57 17 529 0.48 -211 -6 3.69 NM <0.5 <5 55.2 NA <50 <0.08 26.6 NA NA <5 NA <5 NA 844 <5 416 <5 <10 NA NA 27.2 <0.1 400 b NA <10 CW-3D 04/02/2012 7.5 1.30 18 498 1.07 -152 53 6.98 NM <0.5 <5 46.1 NA <50 <0.08 27 NA NA <5 NA <5 NA 710 <5 179 <5 <10 NA NA 26.1 <0.1 328 NA <10 CW-3D 07/11/2012 7.5 3.20 20 524 2.19 -47 158 5.69 NM <0.5 <5 43.8 NA <50 <0.08 26.5 NA NA <5 NA <5 NA 286 <5 84.8 <5 <10 NA NA 29.6 <0.1 332 NA <10 CW-3D 11/07/2012 7.6 2.95 13 519 1.81 -101 104 2.64 NM <0.5 <5 51.1 NA <50 <0.08 26.1 NA NA <5 NA <5 NA 599 <5 159 <5 <10 NA NA 31.7 <0.1 332 NA 51.5 CW-3D 04/08/2013 7.3 1.40 19 550 1.89 -114 91 9.72 NM <1 1.02 43 NA <50 <1 23 NA NA <5 NA <5 NA 291 <1 130 <5 <1 NA NA 28 <0.2 340 NA <5 CW-3D 11/11/2013 7.4 1.89 16 538 0.7 184 389 3.7 NM <1 <1 57 NA <50 <1 23 NA NA <5 NA <5 NA 284 <1 118 <5 <1 NA NA 30 <0.2 350 NA <5 CW-3D 04/04/2014 7.7 1.70 14 487 5.9 253 458 4.3 NM <1 <1 46 NA <50 <1 26 NA NA <5 NA <5 NA 215 <1 59 <5 <1 NA NA 31 <0.2 330 NA <5 CW-3D 07/15/2014 7.6 3.04 25 536 1.41 116 321 4.77 NM <1 <1 57 NA <50 <1 24 NA NA <5 NA <5 NA 275 <1 65 <5 <1 NA NA 32 <0.2 340 NA <5 CW-3D 11/11/2014 7.5 2.55 20 552 0.38 181 386 5.08 NM <1 <1 59 NA <50 <1 24 NA NA <5 NA <5 NA 174 <1 52 <5 <1 NA NA 33 <0.2 330 NA 7 CW-3D 07/08/2015 7.5 2.40 22 534 1.5 38 243 5.19 NM <1 <1 147 <1 <50 <1 23 NA NA <5 <1 <5 NA 11 <1 <5 <5 <1 54.1 NA 33 <0.2 340 3.46 <5 CW-3D 09/16/2015 7.8 10.98 16 548 2.3 75 280 5.28 NM <1 <1 62 <1 <50 <1 23 NA NA <1 <1 <1 NA 58 <1 12 <1 <1 18.7 260 33 <0.2 <25 3.17 <5 CW-3D 11/04/2015 7.5 2.10 19 534 0.3 38 243 4.08 NM <1 <1 43 <1 <50 <1 25 NA NA <5 <1 <5 NA 83 <1 48 <5 <1 18.1 267 32 <0.2 350 1.66 <5 CW-3D 04/07/2016 7.5 1.78 14 555 0.42 162 367 6.84 NM <1 <1 62 <1 <50 <1 25 NA NA <5 <1 <5 NA 281 <1 247 <5 <1 19.1 285 32 <0.2 320 1.65 <5 GMW-7 12/19/2002 6.7 30.64 NM 453 NM NM NM NM NM NA <5 580 NA NA <2 66.7 NA NA <5 NA 5 0.19 831 <5 154 NA <2 NA NA 64 NA 384 NA 29 GMW-7 11/12/2003 NM NM NM 648 NM NM NM NM NM NA <5 430 NA NA <2 67.9 NA NA <5 NA 3 0.28 271 <5 10 NA 4 NA NA 549 NA 431 NA 6 GMW-7 05/25/2004 NM NM NM 623 NM NM NM NM NM NA <5 654 NA NA <2 71.4 NA NA 49 NA 5 0.2 983 <5 34 NA 4 NA NA 36.6 NA 362 NA 8 GMW-7 11/17/2004 6.3 35.00 NM 612 NM NM NM NM NM NA <5 481 NA NA <2 67 NA NA 47.3 NA 8 0.22 693 <5 30 NA 4 NA NA 35.2 NA 365 NA 8 GMW-7 05/18/2005 6.2 28.70 NM 1590 NM NM NM NM NM NA <3 489 NA NA <2 110 NA NA 824 NA 12 0.28 3720 41 32 NA 4 NA NA 31.9 NA 426 NA 27 GMW-7 11/16/2005 6.0 30.30 NM 482 NM NM NM NM NM NA <5 506 NA NA <2 60.2 NA NA 226 NA 44 0.27 1360 <3 17 NA <5 NA NA 27.7 NA 354 NA 5 GMW-7 05/22/2006 5.5 29.85 NM 601 NM NM NM NM NM NA 32 145 NA NA 14 54.6 NA NA <5 NA 9 0.27 6620 <5 2540 NA 370 NA NA 19.1 NA 350 NA 256 GMW-7 11/15/2006 7.6 28.00 NM 671 NM NM NM NM NM NA <3 515 NA NA <2 46.6 NA NA 38 NA 2 0.26 1590 <5 15 NA 3 NA NA 28.6 NA 340 NA <10 GMW-7 05/23/2007 6.2 34.40 NM 486 NM NM NM NM NM NA <3 836 NA NA <2 90.3 NA NA 80 NA 5 0.193 398 <5 <10 NA 8 NA NA 61.2 NA 448 NA 203 GMW-7 11/06/2007 6.2 34.40 NM 676 NM NM NM NM NM NA 3 1000 NA NA <2 82.4 NA NA 79 NA <2 0.26 486 <5 <10 NA 9 NA NA 33.8 NA 418 NA 376 GMW-7 05/22/2008 6.3 35.20 NM 660 NM NM NM NM NM NA <2 506 NA NA <0.5 62 NA NA 143 NA 1.5 0.24 2260 <2 14.1 NA <2 NA NA 39 NA 390 NA 1.6 GMW-7 05/07/2009 6.4 33.80 NM 880 NM NM NM NM NM NA 3.2 366 NA 1250 0.12 96 NA NA 43.4 NA <0.81 0.28 466 2.5 9 52.1 <3.4 NA NA 130 5.2 580 NA 3.9 GMW-7 11/10/2009 6.1 34.15 NM 840 NM NM NM NM NM NA <2.8 196 NA 1430 <0.36 92 NA NA 52.1 NA <1.6 0.23 444 2.3 10.6 54.6 <2.7 NA NA 100 5.2 510 NA 5.4 GMW-7 05/26/2010 6.0 31.61 NM 817 NM NM NM NM NM NA 2.1 127 NA 1560 <0.02 106 NA NA 58.4 NA 1.7 0.17 274 <0.5 7.9 40.2 7.7 NA NA 93.5 <3 527 NA 7.7 GMW-7 11/18/2010 7.2 26.26 17 1008 NM NM NM 23.9 NM NA <0.5 252 NA 812 <0.08 59.5 NA NA 17.4 NA 2 <0.5 593 0.16 27.2 11.1 0.73 NA NA 60.9 <10 563 NA <5 GMW-7 11/08/2012 6.9 30.77 17 560 3.03 147 352 2.13 NM NA <5 216 NA 179 <0.08 74.3 NA NA 1.81 NA 1.1 j,b <0.5 59.2 B <5 2.9 j,b <5 <10 NA NA 96.2 <0.1 532 NA 5.8 j,b GMW-7 11/12/2013 6.8 30.58 14 862 2.6 166 371 4.7 NM NA <1 184 NA 818 <1 71 NA NA 8 NA <5 <1 156 <1 6 <5 <1 NA NA 120 <0.2 620 NA 6 GMW-7 09/15/2015 6.6 29.97 21 1025 2.1 84 289 2.43 0 <1 <1 175 <1 1060 <1 96 NA NA <1 <1 <1 NA 79 <1 <5 <1 <1 71.3 432 120 0.27 660 6.47 <5 GMW-7 04/06/2016 6.6 23.48 16 1297 2.48 215 420 3.49 NM NA 0.0931j 294 NA 1330 <1 114 NA NA 0.786j NA <5 0.174 142 <1 4.02j 0.617j 11.6 NA NA 373 <0.2 916 NA <5 GMW-8 12/19/2002 7.0 49.69 NM 1260 NM NM NM NM NM NA <5 54 NA NA <2 66.2 NA NA <5 NA 2 0.2 187 <5 449 NA <2 NA NA 231 NA 995 NA 25 GMW-8 05/29/2003 7.0 46.22 NM 1340 NM NM NM NM NM NA <5 59 NA NA <2 80.6 NA NA <5 NA <5 0.11 110 <5 122 NA 12 NA NA 329 NA 1220 NA 6 GMW-8 11/12/2003 NM NM NM 1500 NM NM NM NM NM NA <5 53 NA NA <2 85.9 NA NA <5 NA 3 0.14 68 <5 156 NA 15 NA NA 586 NA 1300 NA 7 GMW-8 05/25/2004 NM NM NM 1760 NM NM NM NM NM NA 8 76 NA NA <2 90.5 NA NA <5 NA 3 0.11 324 <5 290 NA 23 NA NA 625 NA 1360 NA 6 GMW-8 11/17/2004 6.6 48.75 NM 1820 NM NM NM NM NM NA 6 61 NA NA <2 99.1 NA NA <5 NA 7 0.11 203 <5 263 NA 17 NA NA 529 NA 1570 NA 6 GMW-8 05/18/2005 6.6 43.35 NM 1600 NM NM NM NM NM NA 3 47 NA NA <2 111 NA NA <5 NA 4 0.15 847 126 1.28 NA 13 NA I NA 1 430 NA 1350 NA 22 P:\Duke Energy Progress. 1026\107, Roxboro Ash Basin GW Assessment P1an\19.EG_CSASUP\Tab1es\Tab1e 1-3 Bedrock GW Exceedances.xlsx Page 2 of 5 TABLE 1-3 BEDROCK GROUNDWATER EXCEEDANCES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter pM Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUS mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* SO 700 4* 700 2 250 0.07^ 0.07^ 10 1* 1000 2 300 15 50 100 20 NE NE 250 0.2* Soo 0.3* 1000 Sample ID Cllection SampleDate o Field Parameters Analytical Results GMW-8 11/16/2005 6.3 45.40 NM 1300 NM NM NM NM NM NA <5 45 NA NA <2 113 NA NA <5 NA 4 1 0.17 50 <3 129 1 NA <5 NA NA 359 NA 1010 NA 5 GMW-8 05/22/2006 6.0 45.85 NM 1560 NM NM NM NM NM NA <3 174 NA NA <2 120 NA NA <5 NA <2 0.16 676 <5 82 NA 10 NA NA 400 NA 1150 NA 150 GMW-8 11/15/2006 6.5 45.56 NM 1740 NM NM NM NM NM NA 3 55 NA NA <2 120 NA NA 5 NA <2 0.11 1080 <5 103 NA 13 NA NA 394 NA 975 NA <10 GMW-8 05/23/2007 6.6 50.00 NM 1500 NM NM NM NM NM NA <3 230 NA NA <2 124 NA NA 11 NA 4 0.11 540 <5 58 NA 12 NA NA 375 NA 1220 NA 116 GMW-8 11/06/2007 6.6 50.00 NM 1810 NM NM NM NM NM NA 6 464 NA NA <2 115 NA NA 9 NA 7 0.14 1210 <5 57 NA 16 NA NA 420 NA 1180 NA 304 GMW-8 05/22/2008 6.6 54.30 NM 1700 NM NM NM NM NM NA <2 48.4 NA NA <5 120 NA NA <2 NA 1.2 0.12 <20 <2 48.4 NA <2 NA NA 390 NA 1200 NA 3 GMW-8 11/19/2008 6.7 52.91 NM 1700 NM NM NM NM NM NA <2.8 49.1 NA NA <0.36 100 NA NA <1 NA <1.6 0.12 <22 <1.9 47.6 NA <2.7 NA NA 380 NA 1200 NA <3.8 GMW-8 05/07/2009 6.8 52.12 NM 1700 NM NM NM NM NM NA <2.8 49.8 NA 2750 0.2 97 NA NA <0.7 NA <0.81 0.17 <31 3.4 36.3 1.4 <3.4 NA NA 410 6.8 1300 NA 5.6 GMW-8 11/10/2009 6.7 52.45 NM 1800 NM NM NM NM NM NA <2.8 38.5 NA 2360 <0.36 87 NA NA 2 NA <1.6 0.18 <22 <1.9 28.8 <1.8 <2.7 NA NA 390 <4.8 1300 NA 7 GMW-8 05/24/2010 6.3 49.30 NM 1840 NM NM NM NM NM NA 0.91 48.3 NA 2660 0.08 73.8 NA NA <0.5 NA 3700 0.1 <4.5 1 <0.1 36 <1.7 2.7 NA NA 472 <3 1400 NA 7.8 GMW-8 11/17/2010 7.1 42.95 19 1782 NM NM NM 2.9 NM NA <0.5 51 NA 2590 <0.08 71.9 NA NA 23.8 NA 2.5 3.3 168 0.11 80.6 14.4 <0.5 NA NA 499 <10 1330 NA 9.6 GMW-8 04/19/2011 6.5 44.09 18 1572 2.24 -38 167 4.11 NM NA <5 54.4 NA 1870 0.092 74.7 NA NA 8.6 NA 19.2 <0.5 71.3 <5 30.5 5.2 <10 NA NA 348 <0.1 1210 NA 49.3 GMW-8 DUP 04/19/2011 6.5 44.09 18 1572 2.24 -38 167 4.11 NM NA <5 53.4 NA 1900 0.11 74.5 NA NA 8.2 B NA 21.6 <0.5 74 <5 31 5.8 <10 NA NA 346 <0.1 1230 NA 55.4 GMW-8 11/01/2011 6.9 45.97 19 1368 0.52 -32 173 6.47 NM NA <5 48.5 NA 1970 <0.08 80.1 NA NA 7.7 NA <5 <0.5 166 <5 33.9 5.9 <10 NA NA 387 <0.1 1190 NA <10 GMW-8 04/03/2012 6.4 46.26 18 1245 0.57 -55 150 6.91 NM NA <5 43.4 NA 1980 0.0711 82.1 NA NA 8.8 B NA 3.4 j,b <0.5 203 <5 25.8 B 5.3 <10 NA NA 279 0.099 j,b 1160 NA 11.8 B GMW-8 11/08/2012 6.6 47.59 15 1423 1.83 189 394 8.22 NM NA <5 48.6 NA 1750 0.0331 76 NA NA 4.4 j,b NA 3.6 j,b <0.5 126B <5 36.7 <5 <10 NA NA 316 <0.1 1120 NA 13.1B GMW-8 04/09/2013 6.5 47.24 17 1590 0.52 125 330 2.06 NM NA <1 41 NA 1680 <1 73 NA NA <5 NA <5 <1 21 <1 30 <5 <1 NA NA 340 <0.2 1100 NA 29 B GMW-8 11/12/2013 6.6 46.12 14 1742 0.23 153 358 8.5 NM NA <1 53 NA 2460 <1 67 NA NA <5 NA <5 <1 230 <1 46 <5 <1 NA NA 460 <0.2 1300 NA 24 GMW-8 04/03/2014 6.6 45.78 19 1865 0.4 228 433 9.8 NM NA <1 51 NA 2680 <1 78 NA NA <5 NA <5 <1 195 B <1 41 <5 <1 NA NA 560 <0.2 1400 NA 30 B GMW-8 11/10/2014 6.6 45.01 18 2014 0.2 135 340 6.25 NM NA <1 56 NA 3060 <1 190 NA NA <5 NA <5 <1 127 B <1 46 <5 <1 NA NA 670 <0.2 1700 NA 64 GMW-8 04/21/2015 6.5 44.80 17 2857 0.3 157 362 5.53 NM NA <1 69 NA 4050 <1 300 NA NA <5 NA <5 <1 332 <1 62 <5 <1 NA NA 780 <0.2 2100 NA 31 GMW-8 09/15/2015 6.5 45.99 18 2625 0.9 96 301 4.99 0 1.44 <1 64 <1 4240 <1 290 NA 0.015j <1 <1 2.84 NA 78 <1 62 <1 1.03 87.3 1390 770 <0.2 2000 1,84 102 GMW-8 11/05/2015 6.5 46.39 19 2809 0.4 99 304 5.03 NM NA 0.452 j 65.4 NA 4710 <0.101 305 B2 NA NA 0.777 j NA <1 0.399 j 100 0.0757 j 64.2 2.33 j 0.267 j NA NA 823 <0.133 2090 NA 8.52 GMW-8 04/06/2016 6.5 45.38 17 2602 0.28 227 432 4.91 NM NA 0.217j 61.7 NA 5350 <1 273 NA NA <5 NA <5 <1 69.7 0.0744j 61 <5 0. 103j NA NA 768 0. 144j 2050 NA 7.97 GMW-9 12/19/2002 6.9 28.19 NM 230 NM NM NM NM NM NA <5 126 NA NA <2 18.3 NA NA <5 NA 9 0.11 7890 <5 266 NA <2 NA NA 18 NA 166 NA 48 GMW-9 05/28/2003 6.2 25.80 NM 1570 NM NM NM NM NM NA <5 66 NA NA <2 17.1 NA NA <5 NA <5 0.11 311 <5 27 NA <2 NA NA 25 NA 200 NA <5 GMW-9 11/12/2003 NM NM NM 197 NM NM NM NM NM NA <5 85 NA NA <2 14.3 NA NA 34 NA 5 0.13 2440 <5 144 NA <2 NA NA <5 NA 199 NA 18 GMW-9 11/17/2010 6.7 23.02 16 153 NM NM NM 4.4 NM NA <0.5 30.5 NA <50 <0.08 5.8 NA NA 11.4 NA 0.7600001 <0.5 102 <0.1 3.9 8.4 <0.5 NA NA 13.7 <10 142 NA 6 GMW-9 09/14/2015 6.0 23.81 16 222 8 124 329 0.67 0 <1 <1 51 <1 <50 <1 4.9 NA NA <1 <1 <1 NA 13 <1 <5 <1 <1 22.7 121 39 0.259 200 3.24 <5 GMW-10 12/19/2002 6.8 34.88 NM 776 NM NM NM NM NM NA <5 227 NA NA <2 28.2 NA NA 11 NA 18 0.14 6680 <5 264 NA 2 NA NA 1720 NA 619 NA 76 GMW-10 05/28/2003 6.2 30.14 NM 208 NM NM NM NM NM NA <5 131 NA NA <2 24.7 NA NA <5 NA <5 0.14 513 <5 98 NA 4 NA NA 256 NA 622 NA 7 GMW-10 11/12/2003 NM NM NM 548 NM NM NM NM NM NA <5 143 NA NA <2 22.9 NA NA 6 NA 8 0.18 2780 <5 148 NA 3 NA NA 132 NA 380 NA 29 GMW-10 05/25/2004 NM NM NM 510 NM NM NM NM NM NA <5 199 NA NA 119 20 NA NA <5 NA 3 0.13 926 <5 79 NA 3 NA NA 147 NA 388 NA 9 GMW-10 11/17/2004 6.1 36.75 NM 475 NM NM NM NM NM NA <5 91 NA NA <2 23.5 NA NA <5 NA 7 0.14 1030 <5 71 NA 2 NA NA 95.2 NA 338 NA 8 GMW-10 05/18/2005 6.0 32.86 NM 408 NM NM NM NM NM NA <3 88 NA NA <2 20 NA NA <5 NA 5 0.16 1050 <5 71 NA <2 NA NA 86.2 NA 338 NA 34 GMW-10 11/16/2005 5.8 33.65 NM 289 NM NM NM NM NM NA <5 119 NA NA <2 20.5 NA NA 10 NA 6 0.17 2820 <3 127 NA <5 NA NA 76.4 NA 251 NA 35 GMW-10 05/22/2006 5.5 35.77 NM 248 NM NM NM NM NM NA <3 219 NA NA <2 16.6 NA NA <5 NA <2 0.17 793 <5 57 NA <2 NA NA 46 NA 218 NA 139 GMW-10 11/15/2006 7.2 34.45 NM 333 NM NM NM NM NM NA <3 80 NA NA <2 15.2 NA NA 6 NA <2 0.18 709 <5 63 NA <2 NA NA 44.5 NA 251 NA <10 GMW-10 11/06/2007 6.1 37.60 NM 362 NM NM NM NM NM NA <3 482 NA NA <2 15.4 NA NA 16 NA <2 0.15 799 <5 54 NA <2 NA NA 44.5 NA 234 NA 312 GMW-10 05/22/2008 6.1 36.95 NM 350 NM NM NM NM NM NA <2 83.3 NA NA <0.5 11 NA NA <2 NA 1.2 0.15 531 <2 42.1 NA <2 NA NA 53 NA 240 NA 3.5 GMW-10 05/07/2009 6.5 36.42 NM 360 NM NM NM NM NM NA <2.8 90 NA 412 0.18 14 NA NA 0.8 NA <0.81 0.24 477 <1.6 41.9 2.3 <3.4 NA NA 61 <2.8 250 NA 5.6 GMW-10 11/10/2009 6.2 37.40 NM 330 NM NM NM NM NM NA <2.8 78.2 NA 345 <0.36 13 NA NA <1 NA <1.6 0.2 317 <1.9 31.4 <1.8 <2.7 NA NA 48 <4.8 250 NA 6.1 GMW-10 04/19/2011 5.9 29.03 18 207 6.22 16 221 4.13 NM NA <5 66.9 NA 59.9 B <0.08 17.6 NA NA 14.6 NA 7.8 <0.5 432 <5 10.8 21.5 <10 NA NA 16.8 <0.1 176 B NA 24.5 GMW-10 11/01/2011 6.3 32.89 23 243 3.88 -33 172 9.92 NM NA <5 76.5 NA 93.2 0.12 15 NA NA 20.5 NA <5 <0.5 547 <5 9.5 13.7 <10 NA NA 15.1 <0.1 223 NA 11.8 GMW-10 11/12/2013 6.0 30.90 17 252 4.5 256 461 7.4 NM NA <1 75 NA 57 <1 16 NA NA <5 NA <5 0.19 326 <1 6 <5 <1 NA NA 26 <0.2 200 NA 31 GMW-10 DUP 11/12/2013 6.0 30.90 17 252 4.5 256 461 7.4 NM NA <1 74 NA 80 <1 16 NA NA <5 NA <5 0.2 303 <1 6 <5 <1 NA NA 25 <0.2 210 NA 31 GMW-10 09/15/2015 5.8 31.99 21 260 3.9 125 330 1.49 0 <1 <1 65 <1 <50 <1 20 NA NA <1 <1 <1 NA 69 <1 <5 1.07 <1 32.1 106 18 <0.2 190 2.93 <5 GMW-11 12/19/2002 6.9 19.16 NM 1450 NM NM NM NM NM NA 0.009 82 NA NA <2 30.3 NA NA <5 NA 4 0.15 624 <5 190 NA 231 NA NA 806 NA 1270 NA 32 GMW-11 05/28/2003 6.6 15.48 NM 758 NM NM NM NM NM NA 0.009 73 NA NA <2 33.7 NA NA <5 NA 6 0.16 1540 <5 44 NA 264 NA NA 686 NA 1570 NA 9 GMW-11 11/12/2003 NM NM NM 1470 NM NM NM NM NM NA 0.009 31 NA NA <2 29.3 NA NA <5 NA 8 0.2 1370 <5 55 NA 196 NA NA 76.1 NA 1260 NA 10 GMW-11 05/25/2004 NM NM NM 1230 NM NM NM NM NM NA 0.009 54 NA NA <2 27.1 NA NA <5 NA 6 0.14 2310 <5 29 NA 155 NA NA 544 NA 979 NA 7 GMW-11 11/17/2004 6.4 26.40 NM 420 NM NM NM NM NM NA <0.005 80 NA NA <2 12.4 NA NA 10 NA 20 0.12 7600 <5 50 NA 21 NA NA 98.4 NA 378 NA 15 GMW-11 05/18/2005 6.6 21.80 NM 699 NM NM NM NM NM NA 0.004 52 NA NA <2 26 NA NA <5 NA 7 0.19 3730 <5 40 NA 67 NA NA 197 NA 551 NA 25 GMW-11 11/16/2005 6.3 22.50 NM 684 NM NM NM NM NM NA <0.005 50 NA NA <2 32.5 NA NA 8 NA 5 0.21 2450 <3 35 NA 60 NA NA 146 NA 530 NA <5 GMW-11 05/22/2006 6.0 24.20 NM 818 NM NM NM NM NM NA <0.003 344 NA NA <2 28.4 NA NA 5 NA 3 0.15 1340 <5 48 NA 43 NA NA 187 NA 484 NA 209 GMW-11 11/15/2006 6.6 24.19 NM 345 NM NM NM NM NM NA <0.003 85 NA NA <2 10.7 NA NA 7 NA 5 0.13 677 <5 54 NA 19 NA NA 72.4 NA 328 NA <10 GMW-11 05/24/2007 6.5 30.40 NM 795 NM NM NM NM NM NA <0.003 320 NA NA <2 42.4 NA NA 7 NA 6 0.136 349 <5 39 NA 41 NA NA 196 NA 550 NA 187 GMW-11 11/06/2007 6.5 30.40 NM 721 NM NM NM NM NM NA <0.003 680 NA NA <2 27.6 NA NA 9 NA 2 0.14 848 <5 59 NA 33 NA NA 146 NA 446 NA 388 GMW-11 05/22/2008 6.5 33.81 NM 770 NM NM NM NM NM NA <0.002 50 NA NA <0.5 17 NA NA <2 NA <0.6 0.14 641 <2 16.3 NA 30.5 NA NA 210 NA 550 NA 1.1 GMW-11 11/19/2008 6.7 35.67 NM 890 NM NM NM NM NM NA <0.0028 84.4 NA NA <0.36 24 NA NA 3.6 NA 12.3 0.16 11200 2.6 287 NA 33.9 NA NA 240 NA 640 NA 16.2 GMW-11 05/08/2009 7.7 31.90 NM 810 NM NM NM NM NM NA <0.0028 99.5 NA 2340 0.19 21 NA NA 12.8 NA 6.94 0.25 8520 3.8 139 8.8 13.9 NA NA 170 4 560 NA 15.3 GMW-11 01/05/2010 6.5 29.35 NM 640 NM NM NM NM NM NA <0.0039 56.2 NA 1330 0.3 16 NA NA 2.2 NA <1.9 0.17 2310 2.2 20.1 3.3 14.3 NA NA 150 <3.4 420 NA 5.5 GMW-11 05/26/2010 6.3 24.91 NM 1790 NM NM NM NM NM NA 0.77 64.7 NA 388 <0.08 7.9 NA NA 2.6 NA 7.2 0.1 1200 0.65 29.7 31.8 20.7 NA NA 995 <3 1660 NA 1 16800 GMW-11 11/16/2010 6.9 19.09 20 1534 NM NM NM 9.3 NM NA 0.58 37 NA 943 <0.08 19.6 NA NA 11.5 NA 1.1 <0.5 205 <0.1 5.3 18.9 25.8 NA NA 755 <10 1300 NA 5.9 GMW-11 04/18/2011 6.8 19.39 21 736 2.89 -30 175 19.6 NM NA <5 59.7 NA 625 <0.08 44.2 NA NA 1.6B NA 3.7 j,b <0.5 1420 <5 46.7 1.8 5.1 NA NA 103 <0.1 506 NA 4.4 j,b GMW-11 11/01/2011 6.9 21.73 17 713 2.94 -47 158 3.82 NM NA <5 51.9 NA 996 <0.08 37.8 NA NA <5 NA <5 <0.5 393 <5 13.9 <5 21.1 NA NA 120 <0.1 539 NA <10 GMW-11 DUP 11/01/2011 6.9 21.73 17 713 2.94 -47 158 3.82 NM NA 3.1 ] 51.4 NA 1080 <0.08 37.6 NA NA <5 NA <5 <0.5 285 F <5 15.7 <5 19 NA NA 122 <0.1 520 NA <10 P:\Duke Energy Progress. 1026\107, Roxboro Ash Basin GW Assessment P1an\19.EG_CSASUP\Tab1es\Tab1e 1-3 Bedrock GW Exceedances.xlsx Page 3 of 5 TABLE 1-3 BEDROCK GROUNDWATER EXCEEDANCES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter pN Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUS mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* SO 700 4* 700 2 250 0.07^ 0.07^ 10 1* 1000 2 300 15 50 100 20 NE NE 250 0.2* Soo 0.3* 1000 Sample ID o Cllection SampleDate Field Parameters Analytical Results GMW-11 04/03/2012 6.7 19.27 18 661 3.64 -78 128 4.63 NM NA <5 45.8 NA 615 <0.08 45.4 NA NA 2.2 j,b NA 1j,b <0.5 248 <5 4.4 j,b <5 13.6 NA NA 114 <0.1 510 NA 4.9 j,b GMW-11 11/07/2012 6.5 22.04 15 752 2.53 148 353 6.61 NM NA <5 53.4 NA 1240 0.0511 39.4 NA NA 1.9 j,b NA 2j,b <0.5 454 B <5 9 B <5 20.1 NA NA 171 <0.1 556 NA 11.4 B GMW-11 04/09/2013 6.5 19.87 18 827 2.73 43 248 4.69 NM NA <1 51 NA 514 <1 40 NA NA <5 NA <5 0.24 150 <1 <5 <5 19.9 NA NA 130 <0.2 540 NA <5 GMW-11 11/12/2013 6.6 20.73 15 854 2.1 285 490 5 NM NA <1 52 NA 1690 <1 34 NA NA <5 NA <5 0.2 234 <1 <5 <5 34.2 NA NA 180 <0.2 600 NA <5 GMW-11 04/03/2014 6.6 18.72 15 860 3.3 290 495 3.9 NM NA <1 46 NA 919 <1 35 NA NA <5 NA <5 0.16 31 <1 <5 <5 20.4 NA NA 180 <0.2 580 NA <5 GMW-11 DUP 04/03/2014 6.6 18.72 SS 860 3.3 290 495 3.9 NM NA <1 44 NA 1050 <1 35 NA NA <5 NA <5 0.16 21 <1 <5 <5 21.8 NA NA 180 <0.2 570 NA <5 GMW-11 11/11/2014 6.6 20.02 15 829 1.78 291 496 2.41 NM NA <1 43 NA 1310 <1 32 NA NA <5 NA <5 0.2 22 B <1 <5 6 28.5 NA NA 210 <0.2 590 NA <5 GMW-11 04/20/2015 6.6 16.48 17 866 2.9 17 222 4.37 NM NA <1 56 NA 708 <1 32 NA NA <5 NA <5 0.17 145 <1 <5 <5 20.9 NA NA 200 <0.2 Sao NA <5 GMW-11 07/01/2015 6.6 18.27 17 849 2.7 304 509 8.5 NM NA NA NA NA NA NA NA NA 0.296 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA GMW-11 09/14/2015 6.6 20.59 17 846 2.7 94 299 0.42 0 <1 <1 45 <1 1590 <1 34 NA NA <1 <1 <1 NA <10 <1 <5 2.43 49 44.9 353 220 <0.2 610 7.04 <5 GMW-11 11/04/2015 6.5 19.67 18 867 1.72 112 317 2.75 NM NA 0.15 j 45.9 NA 1590 <0.101 33.4 B2 NA NA <0.5 NA <1 0.312 j 34.2 <0.065 1.27 j 3.12 j 53.3 NA NA 218 <0.133 607 NA 6.42 GMW-11 04/06/2016 6.6 15.11 15 852 1.89 216 421 2.34 NM NA <1 49.2 NA 1390 <1 33 NA NA <5 NA <5 0.318 j 86.6 <1 1.9 j 3.61 j 41.2 NA NA 230 <0.2 611 NA <5 MW-1BR 07/10/2015 6.7 29.91 20 858 1.5 4 209 5.39 NM <1 <1 628 <1 592 <1 33 NA NA 2.09 4.19 <1 NA 405 <1 2500 5.22 1.3 52.4 495 40 <0.2 550 9.65 86 MW-1BR 09/15/2015 6.6 31.50 20 854 2 46 251 7.81 0 <1 <1 546 <1 501 <1 37 NA NA 1.65 3.55 <1 NA 447 <1 2190 9.67 1.11 47.9 483 43 <0.2 510 8.57 82 MW-1BR 12/04/2015 6.8 30.80 8 700 2.11 77 282 3.45 0 <1 <1 548 <1 346 <1 33 <0.03 NA 1.46 4.7 <1 NA 280 <1 2840 13.7 <1 38.4 457 39 <0.2 440 2.95 13 MW-1BR 01/06/2016 6.8 28.71 5 837 1.4 66 271 2.8 0 <1 <1 543 <1 589 <1 40 <0.03 NA <1 3.37 <1 NA 234 <1 1820 9.72 1.03 54 487 47 <0.2 580 8.41 6 MW-2BR 03/27/2015 6.4 12.07 11 933 2.2 -20 185 7.05 2 <1 1.29 974 <1 <50 <1 120 NA NA <1 4.22 <1 NA 3300 <1 888 1.42 <1 48.3 674 39 <0.2 570 1.27 7 MW-2BR 06/25/2015 6.6 15.60 27 984 1.5 298 503 3.12 NM NA NA NA NA NA NA NA NA <0.003 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-2BR 09/14/2015 6.6 18.29 20 889 0.4 -14 191 4.11 1.5 <1 1.53 1260 <1 <50 <1 120 NA NA <1 3.38 <1 NA 3390 <1 1200 1.27 <1 43.5 612 32 <0.2 550 0.514 10 MW-2BR 12/04/2015 6.4 15.30 15 939 0.27 -1 204 1.88 4.5 <1 2.63 1610 <1 <50 <1 120 <0.03 NA <1 4.15 <1 NA 15600 <1 1870 1.41 <1 24.1 656 22 <0.2 500 0.365 9 MW-2BR 01/06/2016 6.2 12.13 13 841 0.49 31 236 2.91 5 <1 2.32 1180 <1 <50 <1 120 <0.03 NA <1 5.27 <1 NA 16000 <1 967 1.47 <1 45 556 32 <0.2 500 0.357 <5 MW-3BR 05/29/2015 6.6 25.44 21 2424 0.7 31 236 3.5 0 <1 <1 49 <1 2310 <1 71 NA NA <1 4.08 7.06 NA 148 <1 189 1.75 6.02 47.7 1370 1200 <0.2 2100 18.8 <5 MW-3BR DUP 05/29/2015 6.6 25.44 21 2424 0.7 31 236 3.5 0 <1 <1 48 <1 2270 <1 71 NA NA <1 3.55 7.31 NA 146 <1 172 1.61 6.21 46.9 1340 1200 <0.2 2200 11.5 <5 MW-3BR 06/30/2015 6.8 25.00 20 2498 2.49 5 210 8.96 NM NA NA NA NA NA NA NA NA 0.769 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-3BR 09/16/2015 6.7 27.33 18 2441 0.9 92 297 7.77 0 <1 <1 43 <1 2550 <1 76 NA NA <1 2.51 14.9 NA 308 <1 49 1.23 7.13 47.4 1410 1300 <0.2 2400 15.7 <5 MW-3BR 12/04/2015 6.6 23.04 13 2460 0.53 93 298 2.84 0 <1 <1 35 <1 2700 <1 77 0.4 NA <1 1.32 13.9 NA 55 <1 26 1.06 7 54.6 1320 1300 <0.2 2300 IS <5 MW-3BR 01/06/2016 6.8 22.42 1 2659 0.9 7 212 3 0 <1 <1 41 <1 2680 <1 76 0.26 NA <1 2.44 11.2 NA 140 <1 44 1.19 5.03 56.3 1470 1400 <0.2 2300 14 <5 MW-4BR 05/31/2015 9.7 46.39 22 352 6 -226 -21 10 0 2.74 1.57 50 <1 <50 <1 19 NA NA 17.1 <1 <1 NA 204 <1 6 <1 1.67 34.1 170 44 <0.2 220 8.16 303 MW-4BR 06/29/2015 9.2 46.02 21 326 2.5 281 486 13 NM NA NA NA NA NA NA NA NA 11.8 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-4BR 09/15/2015 8.8 46.93 21 343 0.9 -24 181 7.96 0 2.85 1.58 37 <1 <50 <1 20 NA NA 7.45 <1 <1 NA 96 <1 6 <1 1.12 36 174 47 <0.2 200 4.91 36 MW-4BR 12/04/2015 8.9 46.54 12 327 0.86 -29 176 4.46 0 1.87 1.65 35 <1 <50 <1 20 1.9 NA 3.74 <1 <1 NA 86 <1 9 <1 <1 35.9 189 44 <0.2 180 3.59 8 MW-4BR 01/05/2016 8.2 46.15 3 355 0.8 1 206 8.94 0 1.1 1.15 44 <1 <50 <1 19 0.43 NA 1.75 <1 <1 NA 78 <1 17 <1 <1 35 246 39 <0.2 220 1.85 8 MW-4BRL 06/22/2016 7.4 166.28 19 436 2.88 -22 183 7.91 0 <1 <1 72 <1 <50 <1 16 0.059 NA 1.85 4.76 1.55 NA 187 <1 659 2.95 <1 35.5 200 26 <0.2 310 2.41 8 MW-5BR 05/27/2015 NM NM NM NM NM NM NM NM NM <1 <1 16 <1 <50 <1 14 NA NA <1 4.15 1.71 NA 19 <1 62 <1 <1 14.8 269 110 <0.2 1200 2.14 <5 MW-5BR 06/25/2015 7.6 27.90 22 590 3.4 167 276 3.19 NM NA NA NA NA NA NA NA NA 0.273 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-5BR 09/13/2015 7.0 29.99 18 625 0.9 102 307 1.62 0 <1 <1 17 <1 <50 <1 14 NA NA <1 3.62 <1 NA 66 <1 61 <1 <1 15.8 294 150 0.261 430 1.47 <5 MW-5BR 12/04/2015 7.6 27.55 13 598 1.7 45 250 4.1 0 <1 <1 16 <1 <50 <1 14 0.072 NA <1 2.62 1.16 NA 20 <1 67 <1 <1 14.9 278 140 <0.2 380 1.7 <5 MW-5BR 01/05/2016 7.9 26.91 5 664 0.6 -130 76 2.1 0.5 <1 <1 18 <1 <50 <1 14 <0.03 NA <1 4.42 <1 NA 594 <1 196 <1 <1 16.1 290 160 <0.2 470 <0.3 <5 MW-6BR 05/29/2015 8.0 7.49 18 370 0.1 -205 -289 6 NM <1 <1 9 <1 <50 <1 7.8 NA NA <1 <1 <1 NA 302 <1 68 <1 <1 12.6 145 9.3 <0.2 210 0.44 <5 MW-6BR 06/25/2015 8.0 7.42 21 379 0.4 -270 -65 2.85 NM NA NA NA NA NA NA NA NA 0.01 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-6BR 09/13/2015 7.9 8.78 20 410 0.3 -198 7 2.9 0 <1 <1 12 <1 <50 <1 7.6 NA NA <1 <1 1.04 NA 555 <1 70 <1 <1 12.5 169 4.6 <0.2 220 0.544 <5 MW-6BR DUP 09/13/2015 7.9 8.78 20 410 0.3 -198 7 2.9 0 <1 <1 12 <1 <50 <1 8 NA NA <1 <1 1.73 NA 619 <1 71 <1 <1 12.5 166 5.1 <0.2 230 0.927 <5 MW-7BR 05/31/2015 7.1 13.75 21 438 2.9 111 316 3.13 0 <1 <1 10 <1 <50 <1 12 NA NA <1 <1 4.62 NA 260 <1 364 2.72 <1 14.2 142 17 0.216 280 1.21 8 MW-7BR 09/12/2015 7.1 15.51 22 398 2 145 350 1.19 0 <1 <1 21 <1 <50 <1 7.5 NA NA <1 <1 2.87 NA 81 <1 229 <1 <1 19.4 140 22 <0.2 260 5.9 9 MW-8BR 06/08/2015 7.4 40.50 20 593 5.2 155 360 3.91 NM <1 <1 36 <1 <50 <1 25 NA NA 2.58 <1 1.79 NA 480 <1 433 <1 <1 24.2 220 29 <0.2 370 2.1 30 MW-8BR 09/15/2015 8.6 41.12 20 546 0.8 65 270 4.49 0 <1 <1 36 <1 <50 <1 26 NA NA 3.29 <1 4 NA 145 <1 557 <1 <1 24.4 202 28 <0.2 340 2.32 28 MW-9BR 05/31/2015 6.6 32.56 19 376 2.6 97 302 5.34 0 <1 <1 53 <1 <50 <1 15 NA NA <1 2.41 2.93 NA 154 <1 331 1.34 <1 20.9 208 24 <0.2 240 4.34 90 MW-9BR 06/30/2015 6.9 33.08 19 371 1.43 -2 203 4.86 NM NA NA NA NA NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-9BR 09/15/2015 8.1 35.92 19 352 0.5 51 256 9.46 0 <1 <1 33 <1 <50 <1 13 NA NA <1 1.67 1.03 NA 424 <1 257 <1 <1 21.2 163 22 <0.2 210 2.06 18 MW-9BR 12/06/2015 6.8 32.77 16 341 0.24 24 229 3.93 0 <0.5 <0.5 25 <0.2 <50 <0.08 11.5 <0.03 NA <0.5 1.5 <1 NA 250 <0.1 220 0.73 <0.5 22.6 170 21.1 <0.1 154 1.3 <10 MW-9BR 01/07/2016 6.5 30.57 13 305 0.26 80 285 5.97 0 <1 <1 26 <1 <50 <1 11 <0.03 NA <1 1.97 <1 NA 275 <1 250 <1 <1 18.3 178 22 <0.2 210 1.27 25 MW-9BR DUP 01/07/2016 6.5 30.57 13 305 0.26 80 285 5.97 0 <1 <1 26 <1 <50 <1 11 <0.03 NA <1 1.96 <1 NA 283 <1 249 <1 <1 18 177 22 <0.2 220 1.3 24 MW-11BR 03/26/2015 6.9 3.17 13 420 1.8 155 360 1.29 0 <1 <1 118 <1 <50 <1 7.2 NA NA <1 <1 1.64 NA 163 <1 308 <1 <1 12.6 129 35 <0.2 180 2.01 <5 MW-11BR 06/24/2015 7.0 4.89 29 425 0.8 -191 14 1.28 NM NA NA NA NA NA NA NA NA 0.01 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-11BR 09/14/2015 7.0 7.67 24 420 0.3 -75 130 0.57 NM <1 <1 101 <1 <50 <1 5.9 NA NA <1 <1 <1 NA 553 <1 311 <1 <1 12.1 116 37 <0.2 270 0.546 <5 MW-12BR 05/29/2015 7.2 3.50 17 643 0.2 -226 -21 2 1.5 <1 <1 39 <1 <50 <1 38 NA NA <1 1.79 <1 NA 1740 <1 893 <1 <1 18.9 222 31 <0.2 390 0.394 <5 MW-12BR 06/24/2015 7.2 3.73 19 638 0.54 273 478 0.97 NM NA NA NA NA NA NA NA NA 0.004 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-12BR 09/14/2015 7.2 5.02 17 640 0.2 -135 70 1.3 1.5 <1 <1 40 <1 <50 <1 38 NA NA <1 1.38 <1 NA 3300 <1 1050 <1 <1 18.4 223 28 0.762 420 0.424 <5 MW-19BRL 06/16/2016 7.5 37.58 18 616 0.18 -140 65 6.34 NM <1 1.39 79 <1 <50 <1 59 <0.03 NA <1 2.03 <1 NA 2890 <1 1180 <1 <1 36.7 189 7.7 <0.2 380 0.602 <5 MW-20BRL 03/15/2016 7.5 0.00 17 319 0.5 -73 132 0.27 NM <1 <1 <5 <1 <50 <1 6.3 <0.03 NA I <1 <1 <1 NA 352 <1 295 <1 <1 13.8 155 7.5 <0.2 210 <0.3 1 <5 MW-20BRL 06/17/2016 7.3 0.00 16 287 0.22 -85 120 0.4 NM <1 <1 <5 <1 <50 <1 5.5 <0.03 NA <1 <1 <1 NA 88 <1 289 <1 <1 13.7 156 7.7 <0.2 220 <0.3 B2 <5 MW-22BR 06/20/2016 1 7.1 1 16.84 1 20 1 1101 1.64 33 238 7.88 0 <1 <1 89 <1 452 <1 23 0.088 NA <1 6.14 3.61 NA 277 <1 1420 2.72 2.58 46.9 539 350 <0.2 870 2.08 B2 1 <5 MW-23BR 06/17/2016 1 7.5 1 47.63 1 17 1 414 0.22 -64 141 4.98 NM 1.36 <1 66 <1 <50 <1 34 <0.03 NA 4.26 <1 <1 NA 429 <1 380 2.7 <1 19 413 5 <0.2 290 0.865 B2 <5 MW-24BR 06/16/2016 7.6 41.15 17 474 0.26 -98 107 9.05 NM <1 <1 68 <1 <50 <1 21 <0.03 NA <1 <1 <1 NA 52 <1 48 <1 <1 29.7 1890 87 <0.2 320 0.727 <5 MW-25BR 06/16/2016 6.9 50.57 17 854 0.35 -47 158 6.64 NM <1 <1 52 <1 <50 <1 63 <0.03 NA 15.8 <1 1.08 NA 612 <1 544 9.57 <1 28.7 1840 98 <0.2 610 0.803 <5 MW-26BR 06/17/2016 7.1 37.74 17 724 0.48 18 223 7.72 NM <1 <1 70 <1 <50 <1 35 <0.03 NA <1 <1 1.86 NA 424 <1 594 1.28 <1 25.9 279 74 1 <0.2 1 550 1.04 B2 <5 P:\Duke Energy Progress. 1026\107, Roxboro Ash Basin GW Assessment P1an\19.EG_CSASUP\Tab1es\Tab1e 1-3 Bedrock GW Exceedances.xlsx Page 4 of 5 TABLE 1-3 BEDROCK GROUNDWATER EXCEEDANCES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter PH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zin< Reporting Units S.U. ft Deg C umhos/cm mg/l mV mV NTUs mg/l ug/l ug/l ug/l ug/l ug/l ug/l mg/l ug/1 ug/1 ug/l ug/l ug/l mg/l ug/l ug/l ug/l ug/l ug/l mg/l ug/l mg/1 ug/l mg/l ug/I ug/I SSA NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 10 700 4* 700 2 250 0.07^ 0.07^ 10 1* 1000 2 300 15 50 S00 20 NE NE 250 0.2* 500 0.3* 5000 Sample ID Sample Collection Date Field Parameters Analytical Results NCDEQ Sampled Water Supply Wells RC-1 (Duke) 03/16/2015 NM NM NM NM NM NM NM NM NM <1 <1 <5 <1 <50 <1 38 NA NA <5 <1 <5 NA <10 <1 10 <5 1.57 23.4 432 48 <0.2 390 3.47 16 RO-1 (Vendor) 03/16/2015 6.9 NM 16 505 4.01 NM NM <1 NM <3 <10 3.62 <1 <100 <1 39.4 <20 NA <10 <5 <10 NA <50 1.73 8.29 <10 2.39 22.9 390 51 <1 405 2.84 14.7 RO-2 (Duke) 05/04/2015 NM NM NM NM NM NM NM NM NM <1 <1 71 <1 <50 <1 22 NA NA <5 <1 42 NA 17 1.79 <5 <5 <1 37.3 205 72 <0.2 380 1.76 94 RO-2 (Vendor) 05/04/2015 6.6 NM 17 640 NM NM NM <1 NM <5 <5 64.4 <2 <50 <0.8 24 0.11 NA <5 <5 39.1 NA <500 1.8 <5 <5 <5 <0.5 <5 <8 <1 383 <10 87.4 RO-3(Duke) 03/12/2015 NM NM NM NM NM NM NM NM NM <1 <1 70 <1 <50 <1 44 NA NA <5 <1 5 NA <10 <1 <5 <5 <1 33.3 190 74 <0.2 400 2.69 17 RO-3 (Vendor) 03/12/2015 6.3 NM 15 542 5.4 NM NM <0.4 NM <1 <1 65 <1 <500 <1 47 <10 NA <1 <1 6.1 NA <50 <1 <5 <2 <1 34 180 71 <1 410 <5 16 RO-4(Duke) 02/19/2015 NM NM NM NM NM NM NM NM NM <1 <1 60 <1 <50 <1 15 NA NA <5 <1 <5 NA 215 <1 152 <5 <1 15.2 250 8.1 <0.2 250 0.88 17 RO-4 (Vendor) 02/19/2015 6.8 NM 13 400 4.72 NM NM <1 NM <0.5 <2 66.1 <0.5 <50 <0.15 17 <5 NA 2.69 <1 2.27 NA 228 1 10.5 144 1.35 <2 16.4 1 260 7 <0.5 267 1.38 19.6 RO-7 (Duke) 08/17/2015 NM NM NM NM NM NM NM NM NM <1 <1 69 <1 <50 <1 18 NA NA <5 <1 10 NA 24 <1 28 <5 <1 15.6 259 6.5 <0.2 200 6.03 44 RO-7 (Vendor) 08/17/2015 6.2 NM 22 261 4.12 NM NM <1 NM <0.5 <0.5 67.8 <0.2 <5 <0.08 19.4 0.57 NA 6.2 <0.5 10.1 NA 53.8 0.25 29.4 1.9 <0.5 16.3 268 7.1 <0.1 200 5.9 40.7 RO-8(Duke) 04/27/2015 NM NM NM NM NM NM NM NM NM <1 <1 55 <1 <50 <1 40 NA NA <5 <1 21 NA 24 14 <5 <5 <1 19.3 251 27 <0.2 360 4.78 43 RO-8 (Vendor) 04/27/2015 6.7 NM 13 594 2.2 NM NM <1 NM <0.5 <0.5 51 <0.2 <5 <0.08 44.2 0.19 NA <0.5 <0.5 25.4 NA <50 40.3 1.9 <0.5 <0.5 18.4 255 29.2 <0.1 366 4.5 40.9 RO-10-1(Duke) 05/04/2015 NM NM NM NM NM NM NM NM NM <1 <1 330 <1 <50 <1 320 NA NA <5 3.74 5 NA 142 <1 982 <5 <1 62.9 1020 17 <0.2 1000 3.26 13 RO-10-1 (Vendor) 05/04/2015 6.5 NM 22 184 3.8 NM NM 1.5 NM <5 <5 300 <2 <50 <0.8 335 0.062 NA <5 <5 <10 NA <500 <1 <5 <5 <5 59.8 936 <2 <1 999 <10 <50 RO-10-2(Duke) 05/04/2015 NM NM NM NM NM NM NM NM NM <1 <1 128 <1 <50 <1 29 NA NA <5 <1 5 NA 1260 1.72 369 <5 <1 26.9 277 25 <0.2 360 3.87 15 RO-10-2 (Vendor) 05/04/2015 6.7 NM 19 631 0.61 NM NM 6.2 NM <5 <5 <3 <2 <50 <0.8 30.3 <0.03 NA <5 <5 <10 NA <500 1.7 <5 <5 <5 <0.5 <5 27 <1 369 <10 <so RO-11(Duke) 08/17/2015 NM NM NM NM NM NM NM NM NM <1 <1 127 <1 <50 <1 29 NA NA <5 <3 20 NA 26 2.08 <5 <5 <i 27.2 231 29 <0.2 340 10.2 40 RO-11 (Vendor) 08/17/2015 6.4 NM 23 470 3.42 NM NM <1 NM <0.5 <0.5 125 <0.2 <5 <0.08 31.2 1.2 NA 1.7 <0.5 19.5 NA <50 2.3 1.5 0.56 <0.5 25.3 236 31.1 <0.1 326 10.6 36.3 RO-12(Duke) 08/17/2015 NM NM NM NM NM NM NM NM NM <1 <1 69 <1 <50 <1 24 NA NA <5 <1 <5 NA 1140 <1 531 <5 <1 40 325 73 <0.2 470 0.45S 12 RO-12 (Vendor) 08/17/2015 6.8 NM 21 662 0.89 NM NM 8.9 NM <0.5 <0.5 67.1 <0.2 6.1 <0.08 26.7 <0.03 NA <0.5 <0.5 1.3 NA 1100 0.24 494 <0.5 <0.5 36.5 326 71.8 <0.1 463 <1 12.2 RO-13 (Duke) 08/17/2015 NM NM NM NM NM NM NM NM NM <1 <1 33 <1 <50 <1 8.2 NA NA <5 <1 91 NA <10 1.2 <5 <5 <1 10.5 165 1.5 <0.2 130 3.06 54 RO-13 (Vendor) 08/17/2015 6.0 NM 23 145 5.07 NM NM <1 NM <0.5 <0.5 30.9 <0.2 <5 <0.08 8.4 0.92 NA 1.3 <0.5 93.2 NA <50 1.3 3.7 <0.5 <0.5 9.99 166 2.6 <0.1 138 3.1 51.1 RO-14(Duke) 08/18/2015 NM NM NM NM NM NM NM NM NM <1 <1 53 <1 <50 <1 29 NA NA <5 <1 5 NA 887 <1 6 <5 1.15 16.7 249 51 <0.2 390 6.02 31 RO-14 (Vendor) 08/18/2015 7.1 NM 24 647 0.95 NM NM 7.4 NM <0.5 <0.5 48.6 <0.2 <5 <0.08 31 <0.03 NA <0.5 <0.5 7.6 NA 827 1 0.76 5.9 1<0.5 1.1 16.5 1 244 52.3 <0.1 382 5.6 29.9 RO-15(Duke) 10/22/2015 NM NM NM NM NM NM NM NM NM <1 <1 60 <1 <50 <1 39 1 NA NA <5 <1 13 NA 17 <1 <5 I <5 <1 61.7 188 46 <0.2 460 14.9 240 RO-15 (Vendor) 10/22/2015 7.0 NM 18 799 2.14 NM NM <1 NM <0.5 <0.5 59 <0.2 <5 <0.08 44.5 0.83 NA 1.3 <0.5 13.4 NA <50 0.64 0.62 0.61 <0.5 64.7 190 47.1 <0.1 456 16.1 <5 RO-16 (Duke) 10/22/2015 NM NM NM NM NM NM NM NM NM <1 11 19 <1 <50 <1 7.2 NA NA <5 <1 8 NA <10 <1 <5 <5 <1 15.5 124 19 <0.2 170 5.1.3 29 RO-16 (Vendor) 10/22/2015 6.1 NM 17 188 2.4 NM NM <1 NM <0.5 <0.5 18.7 <0.2 <5 <0.08 7.8 1.2 NA 1.4 <0.5 7.8 NA <50 0.56 0.98 1.4 <0.5 10.05 121 <Z <0.1 <ZS 5.5 <5 Prepared by: BER Checked by: CDE Notes: F] - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 Spec Cord = Specific Conductance Deg C = Degrees Celsius NTU = Nephelometric turbidity unit NM = Not measured CUP = Duplicate umhos/cm = Micro mhos per centimeter NE = Not established = NC DHHS Health Screening Level S.U. = Standard Unit mg/I = Milligram per liter DO = Dissolved oxygen B = Target analyte detected in method blank at or above the reporting limit. ft = Feet mV = Millivolts ORP = Oxidation -Reduction Potential < = Concentration not detected at or above the reporting limit NA = Not analyzed ug/I = Microgram per liter Eh = Redox Potential Temp = Temperature 3 = Estimated concentration above the adjusted method detection limit and below theadjusted 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 (MDQ and therefore concentration is estimated. b = Target analyte detected in method blank at or above the reporting limit. M1 = Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. M4 = The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample Is valid and may be used for compliance purposes. P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-3 Bedrock GW Exceedances.xlsx Page 5 of 5 TABLE 1-4 WATER ELEVATION DATA - JUNE 14, 2016 ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Well ID Northing (Feet) Eastin9 (Feet) Top of Casing Elevation (Feet, MSL) Water Level from TOC (Feet) Ground Surface Elevation (Feet, MSL) TOC Height (Feet) Water Level (Feet, BGS) Water Elevations (Feet, MSL) GWA Monitoring Wells ABMW-01 991717.60 1977553.39 470.58 6.84 467.57 3.01 3.83 463.74 ABMW-01BR 991717.87 1977548.29 470.60 7.59 467.66 2.94 4.65 463.01 ABMW-02 990476.64 1978113.17 471.73 9.05 469.00 2.73 6.32 462.68 ABMW-02BR 990481.81 1978118.15 471.68 9.04 468.94 2.74 6.30 462.64 ABMW-03 992468.82 1977830.05 471.75 7.05 468.18 3.57 3.48 464.70 ABMW-03BR 992469.71 1977834.64 471.87 23.06 468.22 3.65 19.41 448.81 ABMW-03BRL 992476.55 1977828.55 471.90 46.17 468.27 3.64 42.53 425.73 ABMW-04 993230.04 1980874.56 500.14 30.43 497.30 2.84 27.59 469.71 ABMW-04BR 993231.94 1980879.20 500.14 30.54 497.23 2.91 27.63 469.60 ABMW-05 993818.44 1980356.45 480.03 11.98 477.37 2.66 9.32 468.05 ABMW-OSD 993819.31 1980358.91 479.98 45.18 477.27 2.71 42.47 434.80 ABMW-06 993007.81 1980056.17 481.13 12.15 478.25 2.88 9.27 468.98 ABMW-6BR 993008.04 1980058.74 481.19 12.15 478.19 3.00 9.15 469.04 ABMW-07 993704.63 1980943.64 479.33 11.46 476.64 2.69 8.77 467.87 ABMW-07BR 993704.41 1980941.24 479.29 14.35 476.44 2.85 11.50 464.94 ABMW-07BRL 993697.74 1980958.06 480.43 22.56 477.53 2.90 19.66 457.87 BG-01D 987877.39 1976136.75 534.50 37.41 531.18 3.32 34.09 497.09 BG-01BR 987880.96 1976137.66 534.68 38.12 531.20 3.48 34.64 496.56 BG-01BRL 988112.06 1976428.29 519.99 58.35 517.28 2.72 55.63 461.64 MW-0113R 994421.40 1982989.86 507.86 27.49 504.82 3.04 24.45 480.37 MW-02BR 992275.11 1979378.74 493.79 12.76 490.79 3.00 9.76 481.03 MW-03BR 995567.44 1982389.53 452.77 23.64 449.59 3.18 20.47 429.13 MW-04BR 987870.41 1978604.32 502.46 46.32 499.10 3.35 42.97 456.14 MW-04BRL 987877.36 1978601.48 502.62 35.62 499.66 2.96 32.66 467.00 MW-05BR 993047.04 1978346.60 458.97 26.96 455.94 3.02 23.94 432.01 MW-05D 993051.09 1978345.24 458.71 8.75 455.76 2.95 5.80 449.96 MW-06BR 993847.69 1978041.65 417.73 6.94 415.02 2.71 4.23 410.79 MW-06D 993844.55 1978041.17 417.71 6.38 415.01 2.70 3.68 411.33 MW-07BR 989954.04 1975502.89 478.10 13.25 475.15 2.95 10.30 464.85 MW-08BR 991669.30 1975524.61 482.75 39.52 479.85 2.90 36.62 443.23 MW-09BR 992764.11 1976206.52 450.17 31.36 447.25 2.92 28.44 418.81 MW-1013R 989997.66 1982067.90 536.23 22.10 533.42 2.81 19.29 514.13 MW-11BR 993472.00 1979319.02 467.54 4.12 464.80 2.74 1.38 463.42 MW-12BR 991274.91 1976269.54 456.45 2.72 453.48 2.97 -0.25 453.73 MW-13BR 990704.40 1982798.16 552.98 39.51 550.12 2.86 36.65 513.47 MW-14BR 996095.64 1984648.02 513.34 46.15 510.56 2.78 43.38 467.19 MW-14D 996092.18 1984650.67 513.36 45.94 510.39 2.97 42.97 467.42 MW-14S 996094.02 1984649.28 513.39 38.68 510.48 2.91 Dry Dry MW-15BR 987071.73 1977796.64 508.28 8.24 504.83 3.45 4.79 500.04 MW-15D 987068.84 1977798.33 508.42 7.20 505.24 3.18 4.02 501.22 MW-16BR 990431.57 1981217.87 520.51 29.33 517.62 2.89 26.44 491.18 MW-17BR 992038.66 1985264.19 534.54 37.54 532.05 2.49 35.05 497.00 MW-18BR 986577.83 1982230.65 532.64 44.99 529.44 3.20 41.79 487.65 MW-18D 986575.38 1982232.70 532.66 44.84 529.66 3.00 41.84 487.82 MW-19BRL 990230.28 1982876.09 564.32 37.78 561.16 3.17 34.61 526.54 MW-20BRL 993029.10 1984933.11 487.11 0.00 483.47 3.64 -3.64 487.11 MW-21BRL 991832.78 1982130.13 529.59 120.47 526.57 3.03 117.45 409.12 MW-22D 994705.94 1981520.31 474.05 16.35 470.79 3.26 13.09 457.70 MW-22BR 994705.94 1981529.13 474.00 16.38 470.93 3.07 13.31 457.62 MW-22BRL 994705.94 1981526.19 474.08 69.02 470.79 3.30 65.72 405.06 MW-23BR 993204.21 1984286.31 518.94 47.34 515.74 3.19 44.15 471.60 MW-24BR 992253.43 1985191.48 527.07 39.91 524.02 3.04 36.87 487.16 MW25BR 991842.17 1984850.17 543.38 49.99 540.36 3.02 46.97 493.39 MW-26BR 988570.28 1982360.46 521.29 36.89 518.04 3.25 33.64 484.40 P:\Duke Energy Pmgress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-4 Water Elevation Data - June 14.A. Page 1 of 2 TABLE 1-4 WATER ELEVATION DATA - JUNE 14, 2016 ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Well ID Northing (Feet) Fasting (Feet) Top of Casing Elevation Water Level from TOC (Feet) Ground Surface Elevation TOC Height Water Level (Feet, BGS) Water Elevations (Feet, MSL) Previously Installed Wells BG-01 987881.60 1976145.70 533.74 36.70 530.89 2.85 33.85 497.04 MW-2 992334.64 1976849.04 422.90 12.36 421.34 1.56 10.80 410.54 CW-01 994400.84 1983011.71 508.24 20.36 505.77 2.47 17.89 487.88 CW-02 993052.60 1977462.67 424.60 12.70 421.74 2.86 9.84 411.90 CW-02D 993049.41 1977468.27 424.60 12.70 422.15 2.45 10.25 411.90 CW-03 988904.54 1977321.01 451.79 5.10 448.46 3.33 1.77 446.69 CW-03D 988904.35 1977313.05 451.61 1.78 448.12 3.49 -1.71 449.83 CW-04 987736.04 1978596.91 479.65 28.44 477.26 2.39 26.05 451.21 CW-05 993025.77 1978359.73 459.74 8.69 457.43 2.31 6.38 451.05 GMW-06 994176.00 1981014.17 480.10 20.62 477.70 2.40 18.22 459.48 GMW-07 992406.86 1981055.19 499.60 23.48 496.96 2.64 20.84 476.12 GMW-08 991818.76 1982129.87 528.55 45.38 525.58 2.97 42.41 483.17 GMW-09 991723.26 1983059.40 536.22 20.45 533.80 2.42 18.03 515.77 GMW-10 994405.33 1981428.52 494.11 26.05 490.97 3.14 22.91 468.06 GMW-11 994284.70 1981768.83 496.55 15.11 493.41 3.14 11.97 481.44 PZ-12 992994.77 1983152.75 514.41 42.89 511.64 2.77 40.12 471.52 PZ-14 (No ID, Corresponds to PZ-14 on Map) 993893.20 1980352.80 471.74 15.22 468.85 2.89 12.33 456.52 Prepared by: JHG Checked by: KLS Neils: Water levels collected within a 24 hr. period on June 14, 2016. BGS = Below ground surface MSL = Mean sea level TOC = Top of casing P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment P1an\19.EG_CSASUP\Tab1es\Tab1e 1-4 Water Elevation Data - June 14.x1sx Page 2 of 2 TABLE 1-5 VERTICAL GROUNDWATER GRADIENTS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Well IDs Vertical Hydraulic Gradient (ft per ft) Flow Direction Ash Basin Wells ABMW-01 and ABMW-01BR -0.02 Downward ABMW-02 and ABMW-02BR -0.001 Downward ABMW-03 and ABMW-03BR -0.33 Downward ABMW-03BR and ABMW-03BRL -0.12 Downward ABMW-04 and ABMW-04BR -0.002 Downward ABMW-05 and ABMW-05D -0.92 Downward ABMW-06 and ABMW-06BR 0.002 Upward ABMW-07 and ABMW-07BR -0.05 Downward ABMW-07BR and ABMW-07BRL -0.04 Downward Perimeter and Background Wells BG-01D and BG-01BR -0.01 Downward BG-01BR and BG-01BRL -0.18 Downward MW-04BR and MW-04BRL 0.05 Upward MW-05D and MW-05BR -0.36 Downward MW-06D and MW-06BR -0.01 Downward MW-14D and MW-14BR -0.01 Downward MW-15D and MW-15BR -0.04 Downward MW-18D and MW-18BR -0.003 Downward MW-22D and MW-22BR -0.002 Downward MW-22BR and MW-22BRL -0.23 Downward CW-02 and CW-02D -0.0002 Downward CW-03 and CW-03D 0.08 Upward Prepared: JHG Checked by: MCD Notes: ft = Feet Vertical hydraulic gradient calculations based on June 14, 2016 water level data collected within 24 hours. P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-5 Vertical GW Gradients.xlsx Page 1 of 1 TABLE 1-6 2016 CAMA MONITORING WELL SAMPLE LOCATIONS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Sampling Identification Hydrostrategraphic Unit Well Location Rationale BG-01 Transition Zone Background, West Ash Basin Compliance/CSA BG, establish background dataset BG-01BR Bedrock Background, West Ash Basin CSA BG, establish background dataset MW-10BR Bedrock Background, East Ash Basin CSA BG, establish background dataset MW-13BR Bedrock Background, East Ash Basin CSA BG, establish background dataset MW-14BR Bedrock Background, East Ash Basin CSA BG, establish background dataset MW-15D Transition Zone Background, West Ash Basin CSA BG, establish background dataset MW-15BR Bedrock Background, West Ash Basin CSA BG, establish background dataset MW-17BR Bedrock Background, East Ash Basin EEI CSA BG, establish background dataset MW-18D Transition Zone Background, West Ash Basin SEI CSA BG, establish background dataset MW-18BRL Bedrock Background, West Ash Basin SEI CSA BG, establish background dataset MW-19BR Bedrock Near Dunnaway Rd Wells NCDEQ requested well location MW-20BRL Bedrock Near East Ash Basin EEI NCDEQ requested well location MW-23BR Bedrock Near East Ash Basin EEI Assess Ash Basin Extension Impoundments MW-24BR Bedrock Near East Ash Basin EEI Assess Ash Basin Extension Impoundments MW-25BR Bedrock Near East Ash Basin EEI Assess Ash Basin Extension Impoundments MW-26BR Bedrock Near West Ash Basin SEI Assess Ash Basin Extension Impoundments Notes: EEI = Eastern Extention Impoundment SEI = Southern Extention Impoundment Prepared by: KDB Checked by: CDE P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-6 CAMA Monitoring Well Sampling Summary.xlsx Page 1 of 1 TABLE 1-7 GROUNDWATER MONITORING PARAMETERS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC PARAMETER I RL I UNITS IMETHOD FIELD PARAMETERS pH NA SU Field Water Quality Meter Specific Conductance NA µS/cm Field Water Quality Meter Temperature NA 0C Field Water Quality Meter Dissolved Oxygen NA mg/L Field Water Quality Meter Oxidation Reduction Potential NA mV Field Water Quality Meter Eh NA mV Field Water Quality Meter Turbidity INA I NTU I Field Water Quality Meter INORGANICS Aluminum 0.005 mg/L EPA 200.7 or 6010C Antimony 0.001 mg/L EPA 200.8 or 6020A Arsenic 0.001 mg/L EPA 200.8 or 6020A Barium 0.005 mg/L EPA 200.7 or 6010C Boron 0.05 mg/L EPA 200.7 or 6010C Chromium 0.001 mg/L EPA 200.7 or 6010C Cobalt 0.001 mg/L EPA 200.8 or 6020A Copper 0.001 mg/L EPA 200.8 or 6020A Hexavalent Chromium 0.00003 mg/L EPA 218.7 Iron 0.01 mg/L EPA 200.7 or 6010C Lead 0.001 mg/L EPA 200.8 or 6020A Manganese 0.005 mg/L EPA 200.7 or 6010C Mercury 0.00005 mg/L EPA 245.1 Molybdenum 0.001 mg/L EPA 200.8 or 6020A Nickel 0.001 mg/L EPA 200.8 or 6020A Selenium 0.001 mg/L EPA 200.8 or 6020A Strontium 0.005 mg/L EPA 200.7 or 6010C Thallium (low level) 0.0002 mg/L EPA 200.8 or 6020A Vanadium (low level) 0.0003 mg/L EPA 200.8 or 6020A Zinc 10.005 mg/L I EPA 200.7 or 6010C RADIONUCLIDES Radium 226 1 pCi/L EPA 903.1 Modified Radium 228 3 pCi/L EPA 904.0/SW846 9320 Modified Uranium (233, 234, 236, 238) Varies by isotope µg/mL ISW846 3010A/6020A ANIONS/CATIONS/OTHER Alkalinity (as CaCO3) 20 mg/L SM 2320B Bicarbonate 20 mg/L SM 2320 Calcium 0.01 mg/L EPA 200.7 Carbonate 20 mg/L SM 2320 Chloride 0.1 mg/L EPA 300.0 or 9056A Hardness NA mg/L as CaCO, EPA 130.1 Magnesium 0.005 mg/L EPA 200.7 or 6010C Nitrate + Nitrite 0.023 mg-N/L EPA 353.2 Potassium 0.1 mg/L EPA 200.7 Methane 0.01 mg/L RSK - 175 Sodium 0.05 mg/L EPA 200.7 Sulfate 0.1 mg/L EPA 300.0 or 9056A Sulfide 0.1 mg/L SM 4500 S2 D Total Dissolved Solids 25 mg/L SM 2540C Total Organic Carbon 0.1 mg/L SM5310C/EPA9060A Total Suspended Solids 12 1 m /L ISM 2450D Prepared by: JAW Checked by: BER Notes: 1. Inorganics analyzed for total and dissolved (0.45 micron) concentrations. NA indicates not applicable. P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-7 Groundwater Monitoring Parameters.xlsx Page 1 of 1 TABLE 2-1 DEQ GLOBAL CSA COMMENTS FOR DEP SITES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Number General Comment General Response to Comment 1 DEQ requests determination of 'provisional' background Provisional background groundwater concentrations were provided concentrations (for groundwater in particular). It is understood in the CAP Part 1 reports. Updated provisional background that until a sufficient background data set becomes available to do groundwater concentrations are included in this CSA Supplement 1 statistical analysis the term 'provisional background report. concentrations' will be used. Duke is to propose 'provisional background concentrations' and DEQ will determine background concentrations. 2 Provisional background concentrations should be determined for Provisional background concentrations were provided in the CAP each flow zone (hydrostratigraphic unit) at each facility while Part 1 reports and presented for each media type (soil, sediment, considering similar subsurface geochemical conditions and site- surface water) and hydrogeologic flow zone. Updated provisional specific conditions (e.g. , oxic versus anoxic conditions). background groundwater concentrations are included in this CSA Supplement 1. 3 Geochemical controls (e.g. , pH, DO, and Eh-redox) associated Geochemical controls were discussed in the CAP Part 1 and CAP with contaminant migration should be considered in Site Part 2 documents. PHREEQC geochemical modeling and pH/Eh Conceptual Model. Eh maps similar to pH maps would be useful for maps were included in the discussion. this purpose. 4 Some soil sample analytical detection limits were greater than the Models and risk assessment evaluations used the method NC Soil Protection of Groundwater goals. Soil analysis method detection limit as a conservative approach when detection limits detection limits should be as close as possible to these values. were greater than groundwater protection goals. The lab is aware of the need to use the lowest detection limit possible for soil samples. Soil matrix interference and other factors limit the technical practicality of achieving detection limits at or below the screening level values. 5 Source characterization evaluations should include primary and Geochemical and fate and transport model evaluations provided in secondary soil source contributions (i.e., leaching of ash the CAP considered these mechanisms. constituents onto soil, leaching of naturally occurring constituents from native soils, leaching due to changing geochemical conditions). P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\ Table 2-1 DEQ Global Comments_Roxboro.xlsx Page 1 of 4 TABLE 2-1 DEQ GLOBAL CSA COMMENTS FOR DEP SITES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Number General Comment General Response to Comment 6 COIs should be developed based upon results from pore water, Constituents exceeding the 2L standard have been included in the groundwater and other media. Include hexavalent chromium as CAP. The risk assessment screening process is consistent with COI due to interest in water supply well results. EPA's approach for determining the constituents that need to be evaluated ("Human and Ecological Risk Assessment of Coal Combustion Wastes," USEPA, April 2010, RIN 2050-AE81). Provisional background concentrations for hexavalent chromium in groundwater are being developed. 7 Groundwater results should be mapped and presented in cross- The CSA Supplement 1 graphics address this comment. sectional view to the detection limit rather than just to 2L. Cross - sections should include geologic features and chemical contours. Discuss in text where difficult to contour due to background or other site conditions. 8 Well construction and integrity should be considered when In post-CSA activities, wells have been redeveloped or replaced as analyzing the groundwater data. Monitoring wells that exhibit high necessary. Turbid sample data (samples with turbidity >10 NTUs) pH or turbidity should be redeveloped or replaced. Data from have been screened from use in statistical analysis using samples with >10 NTUs should be screened prior to use in professional judgement where samples may have been visually statistical analysis. clear or the turbidity was close to 10 NTUs. 9 Address influence of ash impoundments on subsurface Geochemical controls and PHREEQC geochemical modeling were geochemistry and how that may influence contaminant distribution discussed in the CAP Part 1 and CAP Part 2 documents. related to CCRs or cause metals to leach from native soils. 10 Provide vertical gradient maps/figures illustrating flow paths, areas Vertical gradient maps were included in the CAP Part 1 reports. of recharge and discharge. Provide plan view map. 11 Show surface water features on base maps and cross -sections. Maps and cross -sections include surface water features where applicable. 12 Tabulate analytical results for water supply wells, including A map of the water supply wells sampled by DEQ and a tabulation strontium, and provide information on maps. of the most recent data is provided in this CSA Supplement 1 report. Maps and cross -sections showing the distribution of strontium are also provided within this supplemental report. P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\ Table 2-1 DEQ Global Comments_Roxboro.xlsx Page 2 of 4 TABLE 2-1 DEQ GLOBAL CSA COMMENTS FOR DEP SITES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Number General Comment General Response to Comment 13 Include analysis for total uranium, radium-226, and radium-228 in Key wells located in background, below the ash basins, and background, below ash basin, immediate downgradient, and other downgradient of the ash basins have been sampled for total downgradient locations. Use Federal MCL for standard for Ra 226, uranium, Ra 226, and Ra 228. These parameters are also included Ra 228, and U. in the 2016 monitoring plan. 14 COPCs (or COI's) should be modeled using site specific Kd values Agreed, it is anticipated that the various models (i.e., or a technical basis provided as to why the modeling or site geochemical, flow and transport) will be updated as additional specific Kd for a parameter could not be conducted. The models data relevant to the models becomes available. should be "living entities" and updated as more information becomes available that could change or confirm the outcome of the models. 15 Appropriate PSRG for chromium is hexavalent chromium due to its The PSRC for hexavalent chromium is being used in post -CSA toxicity drives the risk for the constituent. reports for data comparison purposes. 16 Potential receptors identified as part of the risk assessment should Recreational users of surface water were identified as potential include non -trespassing recreational users of surface water bodies receptors and evaluated as part of the Risk Assessment provided such as boaters and water supply wells. in the CAP 2 reports. At most locations, water supply wells are not located downgradient of the facility and therefore the risk assessment considered the pathway incomplete. Where downgradient water supply wells were identified, the data was evaluated by Haley and Aldrich, Inc. in various reports (2015 and 2016). 17 For isoconcentration contour maps, provide contours for Revised isoconcentration maps with contour lines indicating concentrations above the reporting limit/PQL. Use inferred concentrations above the reporting limit are included in this (dashes) lines where appropriate. document. Where appropriate, inferred lines are used. 18 Data collected to support CSAs should be incorporated into maps, The requested information has been included in various reports narratives and provided in CAPs (water supply, seep, SW, including the CSA report, CAP Part 1, CAP Part 2, and this CSA sediment, background). Data collected prior to CAMA activities Supplement 1 report. should also be included. P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\ Table 2-1 DEQ Global Comments_Roxboro.xlsx Page 3 of 4 TABLE 2-1 DEQ GLOBAL CSA COMMENTS FOR DEP SITES ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Number General Comment General Response to Comment 19 2L exceedances related to naturally occurring conditions cannot be Noted. Initial provisional background concentrations were confirmed until, at a minimum, provisional background presented in the CAP Part 1 report based upon the data available concentrations are determined. Dynamic redox and geochemical at the time. Updated provisional background concentrations are conditions can liberate naturally occurring metals (e.g. , As, Fe, presented in this CSA Supplement 1 report using 5 or 6 data sets Mn) from soil and aquifer media. as available. Duke anticipates at least 8 rounds of data from the new background wells will be used to statistically develop background concentrations. Geochemical modeling has been conducted to assess dynamic redox and geochemical conditions. 20 Surface water hydrology (e.g. , wetlands, tributaries, etc.) as it A discussion of groundwater and surface water interaction was relates to groundwater modeling or risk assessment considerations provided in the CAP Part 1 and site data was incorporated into the should be included in the CAP. groundwater models. Stream information was incorporated in the modeling and risk assessments. Prepared by: JAW Checked by: KWW P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\ Table 2-1 DEQ Global Comments_Roxboro.xlsx Page 4 of 4 TABLE 2-2 RADIOLOGICAL ANALYTICAL RESULTS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter Radium-226 Radium-228 Total Radium Uranium-233 Uranium-234 Uranium-236 Uranium-238 Total Uranium Reporting Units pCi/L pCi/L pCi/L ug/mL ug/mL ug/mL ug/mL ug/mL Federal MCL --- --- 5 --- --- --- --- 0.03 Sample ID Sample Collection Date Analytical Results Background BG-1 07/09/2015 0.719 <3 0.719 <0.00005 <0.00005 <0.00005 0.000504 0.000504 BG-1 04/07/2016 3.78 1.67 5.45 <0.00005 <0.00005 <0.00005 0.000511 0.000511 BG-1BR 07/09/2015 <1 1.41 1.41 <0.00005 <0.00005 <0.00005 0.00122 0.00122 BG-1BR 04/07/2016 2.16 <3 2.16 <0.00005 <0.00005 <0.00005 0.000932 0.000932 MW-10BR 04/07/2016 0.771 <3 0.771 <0.00005 <0.00005 <0.00005 0.00309 0.00309 MW-13BR 04/08/2016 0.742 2.07 2.812 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-14BR 04/08/2016 2.45 <3 2.45 <0.00005 <0.00005 <0.00005 0.000148 j 0.000148 j MW-15BR 04/07/2016 <1 2.64 2.64 <0.00005 <0.00005 <0.00005 0.00047 0.00047 MW-17BR 04/08/2016 1.02 1.9 2.92 <0.00005 <0.00005 <0.00005 0.0003 0.0003 MW-18BR 04/08/2016 3.14 <3 3.14 <0.00005 <0.00005 <0.00005 0.000424 0.000424 MW-18BR DUP 04/08/2016 1.34 <3 1.34 <0.00005 <0.00005 <0.00005 0.000341 0.000341 Ash Pore Water ABMW-1 06/24/2015 0.577 2.37 2.947 <0.00005 <0.00005 <0.00005 0.000165 j 0.000165 j ABMW-7 06/29 2015 0.852 <3 0.852 <0.00005 <0.00005 <0.00005 0.000537 0.000537 Transition Zone GMW-6 1 07/01 2015 1.18 <3 1.18 <0.00005 <0.00005 <0.00005 0.00258 0.00258 Bedrock ABMW-1BR 06/24/2015 0.558 <3 0.558 <0.00005 <0.00005 <0.00005 0.000094 j 0.000094 ABMW-7BR 06/29/2015 <1 <3 <RL <0.00005 <0.00005 <0.00005 0.000786 0.000786 GMW-11 07/01/2015 <1 1.44 1.44 <0.00005 <0.00005 <0.00005 0.000586 0.000586 MW-19BRL 06/16/2016 1.39 <1 1.39 <0.00005 <0.00005 <0.00005 0.000332 0.000332 MW-20BRL 03/15/2016 <1 <3 <RL <0.00005 <0.00005 <0.00005 0.000108 j 0.000108 j MW-20BRL 06/17/2016 2.85 <1 2.85 <0.00005 <0.00005 <0.00005 0.000717 0.000717 MW-23BR 06/17/2016 2.23 <1 2.23 <0.00005 <0.00005 <0.00005 0.000158 j 0.000158 j MW-24BR 1 06/16/2016 1.32 <1 1.32 <0.00005 <0.00005 <0.00005 0.000324 0.000324 MW-25BR 06/16/2016 <1 <1 <RL <0.00005 <0.00005 <0.00005 0.00366 0.00366 MW-26BR 06/17/2016 6 0.894 6.894 <0.00005 <0.00005 <0.00005 0.00335 0.00335 Prepared by: BER Checked by: CDE Notes: 0 - Concentration greater than the Federal MCL (https://www.epa.gov/sites/production/files/2016-06/documents/npwdr_Complete_table.pdf) < = concentration not detected at or above reporting limit j = indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. RL = reporting limit pCi/L = picocuries per liter ug/mL = micrograms per milliliter DUP = Duplicate P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 2-2 Radiological Analytical Results.xlsx Page 1 of 1 TABLE 3-1 EAST ASH BASIN IMPOUNDMENT PORE WATER ANALYTICAL RESULTS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter pH Temp Spec Cond DO ORP Eh Turbidity Alkalinity Aluminum Aluminum Antimony Antimony Arsenic Arsenic Barium Barium Beryllium Beryllium Bi- carbonate Alkalinity Boron Boron Cadmium Cadmium Calcium Carbonate Alkalinity Chloride Chromium (III) Chromium (III) 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 S.U. Deg C umh s mg/I mV mV NTUs 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 ug/I ug/I 15A NCAC 02B/EPA Water Supply NE NE NE NE NE NE NE NE NE 6500 NE 5.6 NE 10 NE 1000 NE NE NE NE NE I NE NE NE NE 250 NE NE NE 3 NE I NE 1SA NCAC 02B/EPA Human Health 5-9 NE NE NE NE NE 25 NE NE 8000 NE 640 NE 10 NE 200000 NE NE NE NE NE NE NE NE NE NE NE NE NE 4 NE NE 35A NCAC 02B/EPA Ecological 6.5-9 NE NE 5 NE NE 25 NE NE 87 NE NE ISO NE NE NE 6.5 NE NE NE NE 0.15 NE NE NE 230 24 NE NE NE 2.7 NE Sample ID Sample Collection Date Field Parameters Analytical Results Shallow CL-2S 04/26/2016 7.4 22 240 8.03 101 306 3.43 39.4 5 179 <1 <1 2.76 3.67 38 40 <1 <1 39.4 1150 1110 <1 <1 20.7 <5 6 <1 <1 <1 <1 12.7 <1 CL-5S 04/26/2016 7.3 21 239 7.86 102 307 4.65 38 12 178 <1 <1 2.76 3.38 39 40 <1 <1 38 1150 1100 <1 <1 20.6 <5 6 <1 <1 <1 <1 11.9 <1 CL-7 04/26/2016 7.4 23 239 7.49 94 299 3.15 37.4 5 171 <1 <1 2.28 3.61 38 41 <1 <1 37.4 1130 1130 <1 <1 20.6 <5 5.9 <1 <1 <1 <1 11 <1 CV-2 04/26/2016 7.4 22 241 7.18 99 304 3.31 38.8 6 173 <1 <1 2.75 3.48 40 41 <1 <1 38.8 1180 1100 <1 <1 20.5 <5 6 <1 <1 <1 <1 10.9 <1 Deep CL-2 04/26/2016 7.2 17 238 10.45 125 330 5.26 37.3 8 347 <1 <1 2.46 3.42 39 42 <1 <1 37.3 1150 1120 <1 <1 20.1 <5 6 <1 <1 <1 <1 9.62 <1 CL-5 04/26/2016 7.1 15 270 4.92 100 305 6.46 41.1 7 332 <1 <1 2.09 4.6 55 59 <1 <1 41.1 1480 1430 <1 <1 24.7 <5 6.4 <1 <1 <1 <1 10.4 <1 Prepared by: BER Checked by: CDE Notes' 0 - Total metal concentration greater than the 15A NC 02B/EPA Water Supply Criteria, 2016(NC), 2016(EPA). -Total metal concentration greater than the 15A NC 02B/EPA Human Health Criteria, 2016(NC), 2016(EPA). 0 - Total metal concentration greater than the 15A NC 02B/EPA Ecological Criteria, 2016(NC), 2016(EPA). S.U. - Standard Unit DIS - Dissolved mV - Millivolt umhos/cm - micro mhos per centimeter Temp - Temperature TOT - Total mg/I -milligrams per liter < = Concentration not detected at or above the reporting limit. Spec Cond - Specific Conductance NE - Not Establish ug/I - micrograms per liter DO - Dissolved Oxygen Deg C - Degrees Celsius mg-N/L - milligrams nitrogen per liter ORP - Oxidation Reduction Potential NTU - Nsphelomstric Turbidity Unit Eh - Redox Potential P:\Duke Energy Progrs-.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Tab1e 3-1 East Ash Basin Impound-t_Pars Watsr.xlsx Page I of 2 TABLE 3-1 EAST ASH BASIN IMPOUNDMENT PORE WATER ANALYTICAL RESULTS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, 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/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 mg-N/L mg/I ug/I ug/I mg/I ug/I ug/I mg/I mg/I ug/I ug/I mg/I mg/I mg/I ug/I ug/I ug/I ug/I 1SA NCAC 0213/EPA Water Supply NE NE NE NE NE NE NE NE NE NE 160 NE 25 10 NE NE NE NE NE 14000 250 NE NE 0.24 500 NE NE NE NE NE NE 15A NCAC 02B/EPA Human Health NE NE NE NE NE NE NE NE NE NE 2000 NE NE NE NE NE NE NE NE 40000 NE NE NE 0.47 NE NE NE NE NE NE NE 35A NCAC 026/EPA Ecological NE NE 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 36 NE Sample ID Sample Collection Date Analytical Results Shallow CL-25 04/26/2016 41 247 1.71 <1 7.82 294 326 0.00129 <10 89.6 95.2 <1 <1 <0.01 4.42 <1 1.01 11.1 360 356 63 <0.1 <0.2 <0.2 160 5.9 <5 0.628 1.08 21 <5 CL-5S 04/26/2016 41 241 1.67 <1 7.78 292 323 0.00141 <10 91.4 87.5 <1 <1 0.054 4.39 1.01 1.06 11.1 361 355 63 <0.1 <0.2 <0.2 150 6.1 <5 0.77 1 19 <5 CL-7 04/26/2016 41 244 1.57 <1 7.78 290 336 0.00133 <10 91.3 95.6 <1 <1 0.025 4.37 1.28 1.3 11.1 358 366 62 <0.1 <0.2 <0.2 160 6 <5 0.72 1.15 16 <5 CV-2 04/26/2016 39 240 1.66 <1 7.76 302 322 0.00136 <10 88.4 89.2 <1 <1 <0.01 4.33 1.01 1.1 11 372 355 63 <0.1 <0.2 <0.2 150 6 <5 0.628 1.01 19 <5 Deep CL-2 04/26/2016 64 428 1.4 <1 7.65 328 390 0.00202 <10 85.2 79.6 <1 <1 <0.01 4.32 <1 1.09 10.8 362 363 62 <0.1 <0.2 <0.2 160 6.2 <5 0.688 1.35 16 <5 CL-5 04/26/2016 34 480 1.55 <1 9.27 956 885 0.00188 <10 94.9 94.4 <1 <1 0.025 4.95 1.08 1.27 12.2 457 463 75 <0.1 <0.2 <0.2 190 6 <5 0.433 1.36 20 <5 Prepared by: BER Checked by: CDE Not- 0 - Total metal concentration greater than the 15A NC 02B/EPA Water Supply Criteria, 2016(NC), 2016(EPA). 0 -Total metal concentration greater than the 15A NC 02B/EPA Human Health Criteria, 2016(NC), 2016(EPA). 0 - Total metal concentration greater than the 15A NC 02B/EPA Ecological Criteria, 2016(NC), 2016(EPA). S.U. = Standard Unit DIS = Dissolved mV = Millivolt umhos/cm = micro mhos per centimeter Temp = Temperature TOT = Total mg/1 = milligrams per liter < = Concentration not detected at or above the reporting limit. Spec Cond = Specific Conductance NE = Not Establish ug/I = micrograms per liter DO = Dissolved Oxygen Deg C = Degrees Celsius mg-N/L = milligrams nitrogen per liter ORP = Oxidation Reduction Potential NTU = Nephslometric Turbidity Unit Eh = Rsdox Potential P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment P1an\19.EG_CSASUP\Tables\Tab1e 3-1 East Ash Basin Impoundment_ Pare Water.xlsx Page 2 of 2 TABLE 3-2 EAST ASH BASIN IMPOUNDMENT SEDIMENT ANALYTICAL RESULTS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter Percent Moisture pH at 25 Deg 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 I mg/kg mg/kg mg/kg mg/kg I mg/kg I 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-Freshwater Sediment ESV NE NE 25000 2 9.8 20 NE NE 1 NE NE 1 43.4 50 1 31.6 20000 1 35.8 NE 460 0.18 NE 22.7 NE NE 11 NE NE NE NE NE NE 121 Sample ID Sample Collection Date Analytical Results Shallow CV-2 04/26/2016 NA 7.2 H6 6800 <0.72 13.9 68.6 0.28 3.1 <0.11 886 <253 D3 6.6 5.3 9.5 9400 3.7 1180 721 0.031 8.1 3.9 <25.3 D3 421 3.3 <47.9 15.9 <253 D3 <0.96 13000 23.3 19 NL-4 04/26/2016 NA 7.6 H6 9110 <0.76 29.7 89 1 4 <0.12 5010 <253 D3 10.6 6.2 15.9 8580 9.4 676 1080 0.047 8.3 8.3 <25.3 D3 727 5.6 Ill 49.7 <253 D3 <1 12400 30.6 23.3 NL-8 04/26/2016 NA 7.6 H6 947 <0.74 3.1 10 0.05 <2.5 <0.12 170 <247 D3 0.99 <0.99 2.8 1140 <0.99 154 145 <0.008 4.4 0.59 <24.7 D3 87.5 1.3 <49.3 3.1 <247 D3 <0.99 9490 3.2 3.4 SL-8 04/26/2016 NA 7.3 H6 894 <0.73 3.4 6.4 <0.048 <2.4 <0.12 138 <243 D3 1.1 <0.97 1.5 1100 <0.97 113 63.3 <0.0079 3.1 0.55 <24.3 D3 <48.5 1.7 <48.5 2.5 <243 D3 <0.97 12400 3 2.9 Deep CL-2 04/26/2016 NA 7.7 H6 305 <0.74 <0.99 3.8 <0.049 4.9 <0.12 104 <249 D3,M1 0.49 <0.99 0.69 93.1 <0.99 56.9 2.1 <0.008 <0.49 0.36 <24.9 H1,D3,M1 75.5 <0.99 <49.5 5 <249 D3,M1 <0.99 28400 1.1 1 CL-4 04/27/2016 46.5 7.9 H6 6250 <3.8 N2 4.1 28.9 0.2 <4.5 <0.23 716 <467 D3 6 2.4 5.6 5550 <1.9 1110 57.2 0.024 2.1 3.5 <46.7 H1,D3 139 2.2 120 9.1 <467 D3 <1.9 11900 18.4 10 CL-6 04/27/2016 32 7.8 H6 16900 M1 <2.8 N2 <1.4 92.7 Mi 0.54 <3.5 M1 <0.17 5410 M1,R1 <365 D3 14.7 9.2 13.3 17700 Ml 3.8 4380 Ml 124 Ml 0.025 <0.71 Ml 11.8 <36.5 D3 238 <1.4 253 32.5 <365 D3 <1.4 1720 51.6 27.5 CL-7 04/27/2016 26 7.5 H6 18700 <2.7 N2 5.7 120 0.43 <3.4 <0.16 3900 <342 D3 21.6 9.7 31.8 26700 2.6 6880 387 <0.011 1.1 18.3 <34.2 D3 1840 2.8 119 31.2 <342 D3 <1.3 2740 69.8 45.9 CV-1 04/27/2016 25.8 7.1 H6 2860 <2.6 N2 <1.3 13.2 <0.067 <3.4 <0.15 205 <334 D3 3.6 2 2.9 2920 <1.3 409 101 0.012 <0.67 2.2 <33.4 H3,D3 110 <1.3 <67.4 2.4 <334 D3 <1.3 1770 8.5 4.8 Prepared By: BER Checked By: CDE Notes: =- Total metal concentration greater than USEPA Region 4 Ecological Risk Assessment Supplemental Guidance Interim Draft (EPA 2015). Table 2A Region 4 Sediment Screening Values (Freshwater ESV). S.U. = Standard Unit Deg C = Degrees Celsius NE = Not established =Percent NA = Not analyzed < = Concentration not detected at or above the reporting limit M3 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable. mg/kg = milligrams per kilogram Hl = Analysis conducted outside the EPA method holding time. H3 = Sample was received or analysis requested beyond the recognized method holding time. N2 = The lab does not hold TNI accreditation for this parameter. RS = RPD value was outside control limits. D3 = Sample was diluted due to the presence of high levels of non -target analytes or other matrix interference. H6 = Analysis initiated outside of the 15 minute EPA required holding time. P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 3-2 East Ash Basin Impoundment_Sediment.xlsx Page 1 of 1 TABLE 3-3 EAST ASH BASIN IMPOUNDMENT SPLP ANALYTICAL RESULTS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter Aluminum Antimony Arsenic Barium Beryllium Boron Cadmium Calcium Chloride Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Molybdenum Nickel srN; Potassium Selenium Sodium Strontium Sulfate Thallium Vanadium Zinc Reporting Units ug/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I mg/I mg/l ug/I mg/I ug/I mg/I ug/I ug/I ug/l SSA NCAC 02L Standard NE 1* SO 700 4* 700 2 NE 250 SO 1* 1000 300 15 NE 50 1 NE 100 NE NE 20 NE NE 250 0.2* 0.3* 1000 Sample ID Sample Collection Date Analytical Results Shallow CV-2 04/26/2016 260 M1 0.51 1.8 170 M1 <0.1 220 M1 <0.08 24.5 M1 <5 0.68 1.4 1.6 140 M1 <0.5 3.5 M1 4400 M1 <0.2 6.7 <5 M1 <0.2 B <5 M1 1.3 <5 M1 270 M1 77.3 B <0.1 2.1 190 M1 NL-4 04/26/2016 <100 0.88 227 140 <0.1 <200 <0.08 37 <5 <0.5 0.56 <1 260 <0.5 3.3 5600 <0.2 302 <5 <0.2 B <5 6.3 <5 360 12.4 B <0.1 1.7 93 NL-8 04/26/2016 220 0.69 6.1 210 <0.1 270 <0.08 11.6 <5 <0.5 5 <1 80 <0.5 3.1 7400 <0.2 19.2 <5 <0.2 B <5 1.8 5.3 200 65.7 B <0.1 0.67 180 SL-8 04/26/2016 440 0.71 1.6 220 0.13 250 0.12 15.1 <5 0.96 7.5 <1 290 <0.5 4.3 6400 <0.2 2.3 5.5 <0.2 B <5 1.9 <5 270 76.1 B 0.11 0.91 210 Deep CL-2 04/26/2016 <100 22.7 70.4 130 <0.1 240 <0.08 5.2 <5 2 <0.5 <1 <50 <0.5 1.1 50 <0.2 55.5 <5 <0.2 B <5 41.4 <5 260 5.5 B <0.1 126 160 CL-4 04/27/2016 1900 2.9 22.2 79 0.7 310 <0.08 2.6 18.7 13.9 5.5 16.2 1400 5.9 1.1 300 <0.2 9.5 <5 <0.37 B <5 12.5 6.4 43 19.9 B 0.59 43.7 300 CL-6 04/27/2016 7900 2.9 24 72 0.7 <200 <0.08 2 13.1 12.7 5.1 14.6 5700 5.5 1 310 <0.2 11 <5 <0.29 B <5 14.3 <5 45 15.7 B 0.61 42 120 CL-7 04/27/2016 10200 2.5 38 100 1 230 0.26 3.5 22.2 21.2 13.3 30.7 9400 12.1 1.8 720 <0.2 13.4 9.1 <0.27 B <5 22.8 5.3 45 17.8 B 0.33 79.5 180 CV-1 04/27/2016 7600 <0.5 1.6 <50 0.79 <200 <0.08 2.2 44.5 35.3 15.3 21.8 7300 6.3 1.6 590 <0.2 1.3 5.4 0.27 B <5 2.1 <5 17 7.2 B <0.1 89.5 200 Prepared by: BER Checked by: CDE Notes: 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. mg/I = Milligram per liter ug/I = Microgram 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. B = Target analyte detected in method blank at or above the reporting limit. M1 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable. P:\Duke Energy Progress.1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 3-3 East Ash Basin Impoundment_SPLP.xlsx Page 1 of 1 TABLE 4-1 PROVISIONAL TRANSITION ZONE BACKGROUND GROUNDWATER SUMMARY BACKGROUND CONCENTRATION SUMMARY ROUNDS 1-5 ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter Reporting Units NC2L Standard Number of Wells Number of Samples Number of Detections Frequency of Detections (%) Transition Zone Minimum Background Concentration Maximum Background Concentration Provisional Background Concentration** pH S.U. 6.5-8.5 3 28 28 100% 6.3 11.8 6.3 - 11.8° Antimony Ng/l 1* 3 28 3 11% 0.64 2.53 2.41 Boron Ng/l 700 3 28 0 0% ND ND ND Chromium Ng/l 10 3 28 25 89% 1.26 73 104.8 Chromium (VI) Ng/l 0.07A 3 7 7 100% 0.78 10.2 47.37 Cobalt Ng/l 1* 3 15 7 47% 0.56 4.01 13.69 Iron Ng/l 300 3 28 28 100% 51 1,760 2,260 Manganese Ng/l 50 3 28 27 96% 5 978 1,084 Selenium Ng/l 20 3 28 11 39% 1.01 15.9 20.07 Sodium mg/l NE 3 15 15 100% 21.9 59.7 59.7° Strontium IIg/l NE 3 13 13 100% 231 1270 2,067 Sulfate mg/1 250 3 28 28 100% 11 130 98.95 Thallium Ng/l 0.2* 3 28 1 4% ND 0.231 0.231' TDS mg/1 500 3 28 28 100% 248 650 632 Vanadium i1g/I 0.3* 1 3 1 14 14 100% 1 1.1 24.4 80.46 Prepared by: MCD Checked by: HHS Notes: - Indicates comparative value. Wells included for background analysis: BG-1, MW-15D, MW-18D Only those parameters for which a 2L is exceeded in the referenced hydrostratigraphic unit are included, plus Strontium as an indicator parameter A single value in the range column indicates only one detected concentration. % = Percent NE = Not Established ND = Not detected above reporting limit mg/I = milligrams per liter pg/I = micrograms per liter TDS = Total dissolved solids S.U. = Standard Unit NC DHHS Health Screening Level *Interim Maximum Allowable Concentration (IMAC) of the 15A NCAC 02L Standard, Appendix 1, April 2013. —Provisional background concentration is the 95 percent Upper Prediction Limit. P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-1 Prov Transition Zone BG GW Summary Rounds 1-5.xlsx Page 1 of 1 TABLE 4-2 PROVISIONAL BEDROCK BACKGROUND GROUNDWATER SUMMARY BACKGROUND CONCENTRATION SUMMARY ROUNDS 1-5 ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter Reporting Units NC2L Standard Number of wells Number of Samples Number of Detections Frequency of Detections ( ) Bedrock Minimum Background Concentration Maximum Background Concentration Provisional Background Concentration** r pH S.U. 6.5-8.5 8 35 35 100% 6.1 8.3 6.1 - 8.3 Antimony Ng/I 1* 8 35 0 0% ND ND ND Barium Ng/1 700 8 35 35 100% 15 380 1,421 Beryllium Ng/I 4* 8 35 0 0% ND ND ND Boron Ng/l 700 8 35 0 0% ND ND ND Chloride mg/I 250 8 35 35 100% 11.7 130 125.2 Chromium Ng/1 10 8 35 12 34% 0.71 4.24 11 Chromium (VI) Ng/I 0.07^ 8 22 3 14% 0.035 0.099 0.116 Cobalt Ng/l 1* 8 35 18 51% 0.94 8.2 29.49 Iron Ng/I 300 8 35 35 100% 33 6,080 12,035 Manganese Ng/l 50 8 35 35 100% 10 1,300 1,677 Nickel Ng/1 100 8 35 23 66% 0.61 2.72 4.676 Selenium Ng/I 20 8 35 0 0% ND ND ND Sodium ni NE 8 35 35 100% 17.9 39.8 38.04 Strontium Ng/I NE 8 35 35 100% 72 960 948 Sulfate Ng/I 250 8 35 35 100% 1.5 42 105.3 Thallium Ng/1 0.2* 8 35 0 0% ND ND ND TDS mg/I 500 8 35 35 100% 231 540 608.8 Vanadium Ng/l 0.3* 8 35 24 69% 0.347 3.080 4.286 Prepared by: MCD Checked by: HHS Notes: F-7 - Indicates comparative value Wells included for background analysis: BG-1BR, MW-10BR, MW-13BR, MW-14BR, MW-15BR, MW-16BR, MW-17BR, and MW-18BR. Only those parameters for which a 2L is exceeded in the referenced hydrostratigraphic unit are included, plus Strontium as an indicator parameter. A single value in the range column indicates only one detected concentration. % = Percent ND = Not detected above reporting limits mg/I = milligrams per liter pg/I = micrograms per liter TDS = Total dissolved solids S.U. = Standard Unit NC DHHS Health Screening Level *Interim Maximum Allowable Concentration (IMAC) of the 15A NCAC 02L Standard, Appendix 1, April 2013. **Provisional background concentration is the 95 percent Upper Prediction Limit. P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-2 Prov Bedrock BG GW Summary Rounds 1-5.xlsx Page 1 of 1 TABLE 4-3 TRANSITION ZONE GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter PH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Barium Boron Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Iron Manganese Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs 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 mg/I ug/1 mg/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 700 700 0.07^ 0.07^ 10 1* 1000 300 50 10 20 NE NE 250 0.2* 500 0.3* Provisional Background 6.3-11.8 NE NE NE NE NE NE NE NE 2.41 NE NE 47.37 47.37 104.8 13.69 NE 2260 1084 NE 20.07 59.7 2067 98.95 0.231 632 80.46 Sample ID Sample Collection Date Field Parameters Analytical Results Background BG-1 11/30/2010 6.8 38.81 19 491 NM NM NM 8.56 NM <0.5 69.7 <50 NA NA 11.1 NA 11.2 881 27.2 1.3 <10 NA NA 12.5 <0.1 299 NA BG-1 04/20/2011 6.4 38.42 20 460 4.42 58 263 9.92 NM <0.5 73.1 <50 NA NA 15 NA 11.4 499 18.5 1.4 <10 NA NA 11.7 <0.1 282 NA BG-1 07/13/2011 6.4 38.48 22 459 6.8 -136 69 9.58 NM <0.5 84 b <50 NA NA 42.7 NA <5 752 25.8 b 1.1 <10 NA NA 11.6 b <0.1 248 b NA BG-1 11/02/2011 6.6 39.72 21 475 5.48 -82 123 9.42 NM <0.5 75.6 <50 NA NA 16.8 NA <5 307 7.8 1.3 <10 NA NA 12.4 <0.1 263 b NA BG-1 04/02/2012 6.4 38.73 23 467 5.11 -72 133 9.8 NM <0.5 72.3 <50 NA NA 8.8 NA <5 286 6.5 1.6 <10 NA NA 11.7 <0.1 298 NA BG-1 07/11/2012 6.3 38.94 18 487 5.33 -51 154 8.57 NM <0.5 81 <50 NA NA <5 NA 6.4 866 18.7 1.5 <10 NA NA 14.2 <0.1 312 NA BG-1 11/06/2012 6.4 40.00 15 468 6.36 140 345 7.91 NM <0.5 84.2 <50 NA NA 16.1 NA <5 532 11.1 1.5 <10 NA NA 14.3 <0.1 300 NA BG-1 04/08/2013 6.3 39.74 18 475 5.9 115 320 5.24 NM <1 79 <50 NA NA <5 NA <5 113 5 1.6 <1 NA NA 11 <0.2 310 NA BG-1 07/08/2013 6.3 39.31 19 482 6.79 10 215 6.79 NM <1 83 <50 NA NA 10 NA <5 368 9 1.7 <1 NA NA 12 <0.2 330 NA BG-1 11/11/2013 6.4 39.73 18 488 5 182 387 9.8 NM <1 83 <50 NA NA 7 NA <5 507 11 1.7 <1 NA NA 12 <0.2 320 NA BG-1 04/03/2014 6.4 39.10 18 506 6.8 253 458 6.6 NM <1 86 <50 NA NA 6 NA <5 370 8 1.9 <1 NA NA 13 <0.2 320 NA BG-1 07/15/2014 6.3 38.54 18 496 5.37 179 384 4.4 NM <1 81 <50 NA NA <5 NA <5 218 6 2 <1 NA NA 14 <0.2 330 NA BG-1 11/12/2014 6.5 39.38 17 505 6.79 345 550 7.45 NM <1 87 <50 NA NA 6 NA <5 437 9 1.9 <1 NA NA 13 <0.2 310 NA BG-1 04/16/2015 6.6 30.05 16 574 3.1 341 546 7.86 NM <1 95 <50 NA NA 13 2.54 <5 283 54 1.8 3.57 35.4 NA 40 <0.2 370 NA BG-1 07/09/2015 6.5 38.45 18 531 3.1 129 334 11 NM <1 90 <50 NA NA 6 1.28 <5 518 36 10 1.29 32.3 NA 24 <0.2 360 17.1 BG-1 09/16/2015 6.5 39.38 18 529 4.7 157 362 9.81 0 <1 91 <50 NA NA 6.77 <1 3.19 811 21 NA 1.44 30.5 414 27 0.231 320 22.7 BG-1 11/05/2015 6.5 39.50 18 532 4.2 149 354 13 NM <1 92 <50 NA NA 8 <1 <5 594 21 11 1.39 32.9 449 25 <0.2 350 18.1 BG-1 12/05/2015 6.4 39.18 17 535 3.67 125 330 9.5 NM <0.5 86 <50 6.2 NA 5.6 0.62 2 360 16 NA 1.2 32.4 440 20.6 <0.1 331 14.5 BG-1 01/05/2016 6.4 38.65 15 528 3.49 170 375 8.46 0 <1 91 <50 4.5 NA 9.02 <1 2.49 484 17 NA 1.01 31.6 445 23 <0.2 350 17.5 BG-1 04/07/2016 6.5 36.66 17 535 5.11 125 330 8.12 NM <1 97 <50 10.2 NA 18 1.85 10 1760 34 11 1.78 31.5 436 24 <0.2 330 24.4 M W-15D 05/30/2015 6.4 8.29 18 658 0.9 58 263 2.57 0 <1 10 <50 NA NA 1.26 4.01 <1 163 316 NA <1 28.4 243 29 <0.2 410 4.96 M W-15D 09/12/2015 7.1 10.76 20 668 1.4 35 240 6.59 NM <1 9 <50 NA NA 2.4 1.11 1.42 671 80 NA <1 29.2 241 28 <0.2 400 7.66 MW-15D 12/05/2015 6.7 8.02 14 624 1.94 35 240 0.74 0 <0.5 5 <50 2.1 NA 1.7 <0.5 <1 58 45 NA <0.5 29.2 240 24.3 <0.1 421 6.5 M W-15D 01/05/2016 6.4 6.63 10 617 1.18 151 356 3.29 0 <1 8 <50 1.5 M6 NA 1.77 <1 <1 240 48 NA <1 26.3 231 24 <0.2 430 8.03 M W-15D 06/23/2016 6.6 7.58 19 653 1.94 166 371 3.04 0 <1 7 <50 2.7 NA 2.56 <1 <1 48 23 3.6 <1 28.9 239 29 <0.2 430 9.15 M W-18D 06/09/2015 11.5 45.58 20 1216 2.2 -91 114 3.13 0 1.72 68 <50 NA NA 73 <1 1.67 148 <5 NA 15.9 59.7 1270 130 <0.2 580 6.83 MW-18D 06/29/2015 11.8 45.88 20 1933 2 7 212 5.81 NM NA NA NA NA 58.6 z NA NA NA NA NA NA NA NA NA NA NA NA NA MW-18D 09/14/2015 8.6 46.71 19 910 0.7 -13 192 13.1 0 2.53 39 <50 NA NA 16.9 <1 <1 51 182 NA 2.78 39.6 764 61 <0.2 650 1.51 MW-18D 12/06/2015 7.1 47.45 17 1049 3.15 28 233 7.16 0 0.64 36 <50 5.1 NA 6.6 0.56 1.3 190 820 NA 2.2 32.6 670 48.1 <0.1 554 1.7 M W-18D 01/05/2016 7.2 47.07 16 1055 1.23 -24 181 1.25 NM <1 19 <50 0.78 NA 2 <1 <1 334 978 NA 1.64 21.9 629 39 <0.2 610 1.1 M W-18D 06/23/2016 7.1 44.72 17 945 2.13 -97 109 6.43 0.5 <1 37 <50 11.2 NA 19.5 <1 <1 456 1040 0.207 1.25 27.5 767 37 <0.2 640 1.33 Transition Zone ABM W-5D 06/09/2015 7.1 44.88 18 442 0.1 -136 69 7.89 NM <1 144 2200 NA NA <1 1.06 <1 30600 5970 NA <1 8.47 421 <0.1 <0.2 210 0.487 ABMW-5D 06/30/2015 7.1 45.40 19 451 0.36 231 436 9.87 NM NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA ABM W-5D 09/15/2015 7.6 47.42 19 465 0.13 -224 -19 9.98 3 <1 156 2200 NA NA <1 <1 <1 30000 5880 NA <1 10.2 487 0.13 <0.2 200 0.576 ABM W-5D 12/03/2015 6.9 44.61 11 441 0.92 -126 79 19.84 3 <1 138 2080 <0.03 NA <1 <1 <1 25300 4970 NA <1 12.4 461 <0.1 <0.2 200 0.406 ABM W-5D 01/06/2016 7.4 45.35 12 442 0.5 -189 16 19.4 2 1.24 147 2160 <0.03 NA 1.03 <1 <1 30000 5690 NA <1 12.5 464 <0.1 <0.2 220 0.556 CW-2 11/29/2010 7.4 13.77 12 698 NM NM NM 2.12 NM <0.5 62.4 <50 NA NA <5 NA <5 55.3 52.9 0.17 <10 NA NA 51.8 <0.1 408 NA CW-2 11/06/2012 6.9 14.41 13 574 2.23 128 333 24.5 NM <0.5 77.1 <50 NA NA <5 NA <5 1030 10.3 0.25 <10 NA NA 91.2 <0.1 385 NA CW-2 07/08/2013 7.0 13.30 20 833 4.06 143 348 3.56 NM <1 98 <50 NA NA <5 NA <5 173 <5 0.34 <1 NA NA 47 <0.2 520 NA CW-2 11/11/2013 6.8 14.41 17 721 4.2 203 408 8 NM <1 98 <50 NA NA <5 NA <5 1190 14 0.25 <1 NA NA 57 <0.2 460 NA CW-2 04/04/2014 7.1 12.94 16 725 5.7 298 503 22 NM <1 97 <50 NA NA <5 NA <5 1070 13 0.26 <1 NA NA 57 <0.2 490 NA CW-2 07/15/2014 6.8 14.15 21 799 3.2 173 378 8.8 NM <1 103 <50 NA NA <5 NA <5 337 <5 0.26 <1 NA NA 58 <0.2 500 NA CW-2 07/08/2015 7.1 13.53 20 726 3.7 107 312 9.77 NM <1 94 <50 NA NA <5 <1 <5 188 <5 1.1 <1 78.5 NA 66 <0.2 450 31.6 CW-2 09/15/2015 6.9 15.04 21 691 2.9 54 259 16.2 0 <1 90 <50 NA NA <1 <1 <1 368 <5 NA <1 66.9 334 77 <0.2 430 37.2 CW-2 11/05/2015 6.0 13.43 18 2 9.5 21 206 1.22 NM <1 83 <50 NA NA <5 <1 <5 47 <5 1.1 <1 70.2 332 79 <0.2 430 33.7 CW-2 04/07/2016 7.0 12.70 14 715 4.32 132 337 2.19 NM <1 92 <50 NA NA <5 <1 <5 125 <5 1.1 <1 85.9 342 70 <0.2 430 32.2 CW-3 11/30/2010 6.9 5.25 14 1075 NM NM NM 9.76 NM <0.5 189 <50 NA NA <5 NA <5 178 7.2 0.58 <10 NA NA 112 <0.1 639 NA CW-3 04/19/2011 5.9 4.01 17 308 0.63 -33 172 12.7 NM <0.5 77.1 <50 NA NA <5 NA <5 716 12.5 <0.1 <10 NA NA 38.4 <0.1 210 NA CW-3 07/13/2011 6.4 5.22 22 1000 2.3 -107 98 1.03 NM <0.5 170 b <50 NA NA <5 NA <5 <50 <5 0.59 <10 NA NA 90.1 <0.1 570 NA CW-3 DUP 07/13/2011 6.4 5.22 22 1000 2.3 -107 98 1.03 NM <0.5 172 b <50 NA NA <5 NA <5 <50 <5 0.59 <10 NA NA 89.5 <0.1 548 NA CW-3 11/02/2011 6.8 5.16 18 980 2.41 -85 120 0.98 NM <0.5 184 <50 NA NA <5 NA 5:::d <50 <5 0.61 <10 NA NA 91.9 <0.1 644 NA CW-3 04/02/2012 6.3 1 4.57 15 287 1 0.34 -51 154 8.84 NM <0.5 78.2 <50 NA NA <5 NA <5 1 481 11.7 <0.2 <10 NA NA 73.8 <0.1 211 NA P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment P1an\19.EG_CSASUP\Tab1es\Tab1e 4-3 Transition Zone GW Exceedances Inc Prov BG.xlsx Page 1 of 3 TABLE 4-3 TRANSITION ZONE GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter PH Water Level Temp Spec Cond DO DRIP Eh Turbidity Ferrous Iron Antimony Barium Boron Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Iron Manganese Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs 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 mg/I ug/1 mg/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 700 700 0.07^ 0.07^ 10 1* 1000 300 50 10 20 NE NE 250 0.2* 500 0.3* Provisional Background 6.3-11.8 NE NE NE NE NE NE NE NE 2.41 NE NE 47.37 47.37 104.8 13.69 NE 2260 1084 NE 20.07 59.7 2067 98.95 0.231 632 80.46 Sample ID Sample Collection Date Field Parameters Analytical Results CW-3 07/11/2012 6.5 5.55 18 955 2.78 -39 166 0.88 NM <0.5 161 <50 NA NA <5 NA <5 <50 <5 0.57 <10 NA NA 104 <0.1 614 NA CW-3 DUP 07/11/2012 6.5 5.55 18 955 2.78 -39 166 0.88 NM <0.5 165 <50 NA NA <5 NA <5 <50 <5 0.58 <10 NA NA 89.1 <0.1 614 NA CW-3 11/07/2012 6.6 5.17 15 990 2.86 68 273 0.39 NM <0.5 178 <50 NA NA <5 NA <5 <50 <5 0.67 <10 NA NA 107 <0.1 652 NA CW-3 04/08/2013 5.6 4.09 15 110 1.98 39 244 34.9 NM <1 29 <50 NA NA <5 NA <5 441 6 <0.023 <1 NA NA 19 <0.2 120 NA CW-3 07/08/2013 6.5 5.00 21 958 2.99 165 370 1.51 NM <1 160 <50 NA NA <5 NA <5 26 <5 0.62 <1 NA NA 85 <0.2 590 NA CW-3 11/11/2013 6.4 5.54 1 17 987 3.2 204 409 1 2.7 NM <1 163 <50 NA NA <5 NA <5 213 1 7 0.53 <1 NA NA 84 <0.2 620 NA CW-3 04/04/2014 6.0 4.85 12 220 0.6 259 464 15 NM <1 51 <50 NA NA <5 NA <5 1030 <5 0.03 <1 NA NA 32 <0.2 170 NA CW-3 DUP 04/04/2014 6.0 4.85 12 220 0.6 259 464 15 NM <1 50 <50 NA NA <5 NA <5 1030 <5 0.03 <1 NA NA 33 <0.2 170 NA CW-3 07/15/2014 6.5 5.25 21 884 3.38 156 361 0.41 NM <1 147 <50 NA NA <5 NA <5 26 <5 0.54 <1 NA NA 78 <0.2 560 NA CW-3 11/11/2014 6.5 5.19 19 947 2.87 232 437 1.36 NM <1 152 <50 NA NA <5 NA <5 45 <5 0.59 <1 NA NA 85 <0.2 590 NA CW-3 DUP 11/11/2014 6.5 5.19 19 947 2.87 232 437 1.36 NM <1 158 <50 NA NA <5 NA <5 44 <5 0.6 <1 NA NA 85 <0.2 590 NA CW-3 04/16/2015 5.8 4.44 13 137 0.3 283 488 66.5 NM <1 44 <50 NA NA <5 <1 <5 5080 14 <0.023 <1 8.84 NA 22 <0.2 180 NA CW-3 07/08/2015 6.5 4.74 19 886 2.5 140 345 1.31 NM <1 62 <50 NA NA <5 <1 <5 152 33 2.6 <1 19.9 NA 75 <0.2 540 3.62 CW-3 DUP 07/08/2015 6.5 4.74 19 886 2.5 140 345 1.31 NM <1 146 <50 NA NA <5 <1 <5 11 <5 2.6 <1 54 NA 75 <0.2 530 3.14 CW-3 09/15/2015 6.5 5.46 20 916 2.2 99 304 1.95 0 <1 154 <50 NA NA <1 <1 <1 54 <5 NA <1 54.6 495 79 <0.2 530 3.92 CW-3 11/04/2015 6.5 4.78 18 516 0.4 -47 158 38.7 NM <1 98 <50 NA NA <5 <1 <5 3310 11 0.97 <1 32.2 282 49 <0.2 370 12.6 CW-3 DUP 11/04/2015 6.5 4.78 18 516 0.4 -47 158 38.7 NM <1 97 <50 NA NA <5 <1 <5 3380 9 0.98 <1 32.1 278 49 <0.2 360 11.7 CW-3 04/07/2016 6.1 5.10 13 420 0.56 193 398 2.63 NM <1 94 <50 NA NA <5 <1 <5 165 <5 0.32 <1 27.3 261 50 <0.2 250 1.46 CW-4 11/30/2010 7.1 28.97 20 599 NM NM NM 8.97 NM <0.5 137 <50 NA NA 29.6 NA 7.3 325 19.9 0.43 <10 NA NA 33.2 <0.1 345 NA CW-4 04/19/2011 6.6 28.63 20 567 2.46 0 205 8.4 NM <0.5 143 <50 NA NA 18.9 NA 6.7 321 11.7 0.59 <10 NA NA 33.4 <0.1 404 NA CW-4 07/13/2011 6.7 29.34 24 589 3.06 -133 72 8.66 NM <0.5 146 b <50 NA NA 22.9 NA <5 391 b 11.9 b 0.46 <10 NA NA 37.6 b <0.1 325 b NA CW-4 11/02/2011 7.0 29.31 18 581 2.45 -41 164 9.31 NM <0.5 136 <50 NA NA <5 NA <5 <50 <5 0.4 <10 NA NA 36.3 <0.1 612 NA CW-4 07/09/2015 6.6 28.62 20 601 1.9 159 364 0.57 NM <1 136 <50 NA 0.284 <5 <1 <5 18 <5 1.9 <1 44.7 NA 37 <0.2 370 2.48 CW-4 09/15/2015 6.7 29.47 18 627 1.5 108 313 3.28 0 <1 136 <50 NA NA <1 <1 <1 76 <5 NA <1 43.4 196 39 <0.2 340 2.48 CW-4 11/04/2015 6.9 29.10 18 576 1.6 -65 140 1.78 NM <1 131 <50 NA NA <5 <1 <5 49 <5 1.7 <1 44.1 192 39 <0.2 380 2.17 CW-4 12/04/2015 6.8 28.87 16 536 1.65 37 242 0.58 0 <1 128 <50 0.35 NA <1 <1 <1 <10 <5 NA <1 46 191 36 <0.2 320 2.06 CW-4 01/05/2016 7.1 28.67 12 521 2.11 36 241 3.67 0 <1 131 <50 0.29 NA <1 <1 <1 29 <5 NA <1 46 189 36 <0.2 360 2.07 CW-4 04/07/2016 6.8 28.44 15 583 1.68 176 381 2.28 NM <1 132 <50 NA NA <5 <1 <5 89 <5 2 <1 44.3 194 38 <0.2 340 2.24 CW-5 11/29/2010 6.7 9.92 15 1655 NM NM NM 6.11 NM <0.5 44 413 NA NA <5 NA <5 61.1 42.3 <0.1 <10 NA NA 873 <0.1 1530 NA CW-5 07/13/2011 6.4 11.96 22 1066 2.69 -135 70 2.92 NM <0.5 20.3 b 424 NA NA <5 NA <5 <50 <5 <0.2 <10 NA NA 472 <0.1 856 NA CW-5 11/02/2011 6.6 11.06 18 1132 4.38 -50 155 1.2 NM <0.5 31.5 467 NA NA <5 NA <5 60.2 <5 <0.2 <10 NA NA 668 <0.1 1150 NA CW-5 04/02/2012 6.6 9.28 15 343 8.14 -38 167 1.96 NM <0.5 38.2 207 NA NA 5.2 NA <5 127 <5 0.26 <10 NA NA 296 <0.1 616 NA CW-5 07/11/2012 6.6 13.15 19 828 3.05 -51 154 1.14 NM <0.5 14.3 543 NA NA <5 NA <5 74.6 <5 0.34 <10 NA NA 339 <0.1 670 NA CW-5 11/07/2012 6.5 10.94 17 1193 4.3 122 327 0.75 NM <0.5 28.6 477 NA NA <5 NA <5 <50 <5 0.35 <10 NA NA 662 <0.1 1290 NA CW-5 04/09/2013 6.4 9.52 19 999 5.43 23 228 4.26 NM <1 31 295 NA NA <5 NA <5 12 <5 0.16 <1 NA NA 490 <0.2 900 NA CW-5 07/08/2013 6.4 9.69 20 1105 4.46 154 359 0.9 NM <1 29 357 NA NA <5 NA <5 19 <5 1.8 <1 NA NA 640 <0.2 1000 NA CW-5 DUP 07/08/2013 6.4 9.69 20 1105 4.46 154 359 0.9 NM <1 30 360 NA NA <5 NA <5 30 <5 1.7 <1 NA NA 640 <0.2 1100 NA CW-5 11/11/2013 6.4 12.38 16 1377 5.5 210 415 2.4 NM <1 26 497 NA NA <5 NA <5 60 <5 0.21 <1 NA NA 700 <0.2 1200 NA CW-5 07/15/2014 6.4 12.14 19 840 3.86 170 375 3.91 NM <1 18 476 NA NA <5 NA <5 84 <5 0.31 <1 NA NA 330 <0.2 670 NA CW-5 11/11/2014 6.5 11.17 17 744 4.51 234 439 4.13 NM <1 28 356 NA NA <5 NA <5 197 <5 0.9 <1 NA NA 300 <0.2 600 NA CW-5 04/16/2015 6.5 9.07 14 1004 4.5 385 590 1.37 NM <1 38 245 NA NA <5 <1 <5 19 <5 1.2 <1 36.6 NA 410 <0.2 840 NA CW-5 07/08/2015 6.6 10.35 20 640 4.2 93 298 3.35 NM <1 32 302 NA NA <5 <1 <5 24 <5 5.8 <1 29.8 NA 250 <0.2 520 28.7 CW-5 09/15/2015 6.4 13.88 22 777 1.5 73 278 3.37 0 <1 22 641 NA NA <1 <1 <1 97 <5 NA <1 32.8 291 290 <0.2 570 18.4 CW-5 11/04/2015 6.9 10.29 18 586 4.4 37 242 0.39 NM <1 32 349 NA NA <5 <1 <5 <10 <5 5.4 <1 28.1 297 200 <0.2 540 28.4 CW-5 04/07/2016 6.6 8.69 14 358 6.64 150 355 0.6 NM <1 47 140 NA NA <5 <1 <5 15 <5 5 <1 24.7 216 160 <0.2 390 30.9 GMW-6 12/19/2002 6.8 24.94 NM 1975 NM NM NM NM NM NA 74 NA NA NA 10 NA 10 4240 1660 0.91 96 NA NA 1108 NA 2050 NA GMW-6 05/28/2003 6.4 21.34 NM 2040 NM NM NM NM NM NA 68 NA NA NA 6 NA 5 1750 609 0.94 101 NA NA 830 NA 1930 NA GMW-6 11/12/2003 NM NM NM 1990 NM NM NM NM NM NA 355 NA NA NA 160 NA 111 59100 2330 1.12 93 NA NA 859 NA 1760 NA GMW-6 05/20/2004 NM NM NM <10 NM NM NM NM NM NA 51 NA NA NA <5 NA 8 1950 169 1.17 105 NA NA 586 NA 1550 NA GMW-6 11/17/2004 6.4 25.45 NM 1700 NM NM NM NM NM NA 106 NA NA NA 28 27 13100 372 1.53 94 NA NA 454 NA 1420 NA GMW-6 05/18/2005 6.4 23.16 NM 1620 NM NM NM NM NM NA 63 NA NA NA 11 A 12 6950 166 1.21 88 NA NA 589 NA 1600 NA GMW-6 11/16/2005 6.2 27.10 NM 1550 NM NM NM NM NM NA 54 NA NA NA 10 A !NAA 6 2240 81 1.27 96 NA NA 554 NA 1200 NA GMW-6 05/22/2006 5.8 27.20 NM 1950 NM NM NM NM NM NA 309 NA NA NA 5 A 3 1600 51 1.04 86 NA NA 627 NA 1400 NA GMW-6 11/15/2006 7.4 24.91 NM 2140 NM NM NM NM NM NA 70 NA NA NA 10 12 4230 236 1.01 98 NA NA 438 NA 1570 NA P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment P1an\19.EG_CSASUP\Tab1es\Tab1e 4-3 Transition Zone GW Exceedances Inc Prov BG.xlsx Page 2 of 3 TABLE 4-3 TRANSITION ZONE GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter PH Water Level Temp Spec Cond DO DRIP Eh Turbidity Ferrous Iron Antimony Barium Boron Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Iron Manganese Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs 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 mg/I ug/1 mg/I ug/I mg/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 700 700 0.07^ 0.07^ 10 1* 1000 300 50 10 20 NE NE 250 0.2* 500 0.3* Provisional Background 6.3-11.8 NE NE NE NE NE NE NE NE 2.41 NE NE 47.37 47.37 104.8 13.69 NE 2260 1084 NE 20.07 59.7 2067 98.95 0.231 632 80.46 Sample ID Sample Collection Date Field Parameters Analytical Results GMW-6 05/23/2007 6.4 27.40 NM 1440 NM NM NM NM NM NA 304 NA NA NA 12 NA 7 1870 86 1.15 81 NA NA 666 NA 1600 NA GMW-6 11/06/2007 6.4 27.40 NM 1990 NM NM NM NM NM NA 845 NA NA NA 10 NA 8 2440 60 0.92 76 NA NA 587 NA 1530 NA GMW-6 05/22/2008 6.4 27.10 NM 2000 NM NM NM NM NM NA 59.2 NA NA NA <2 NA 1.6 3230 82.8 0.84 71.2 NA NA 830 NA 1700 NA GMW-6 11/19/2008 6.5 27.94 NM 2100 NM NM NM NM NM NA 47.9 NA NA NA <1 NA <1.6 1240 46.4 0.66 74.4 NA NA 880 NA 1800 NA GMW-6 05/07/2009 6.8 25.18 NM 2000 NM NM NM NM NM NA 55.9 3820 NA NA 5.5 NA <0.81 2220 55.6 0.78 68.1 NA NA 810 5.2 1800 NA GMW-6 11/10/2009 6.5 25.65 1 NM 1900 NM NM NM NM NM NA 33.7 2850 NA NA 6.5 NA <1.6 680 1 22.7 0.83 56.6 NA NA 690 <4.8 1600 NA GMW-6 05/26/2010 6.5 23.52 NM 1970 NM NM NM NM NM NA 39.4 3920 NA NA 2.6 NA 4700 861 25 0.85 61 NA NA 709 <3 1640 NA GMW-6 11/16/2010 7.1 23.04 17 1782 NM NM NM 19.3 NM NA 43.5 2620 NA NA 5.6 NA 3.9 429 46.4 2.3 73.2 NA NA 624 <10 1420 NA GMW-6 04/19/2011 6.6 21.30 18 1603 4.97 22 227 3.59 NM NA 49.7 962 NA NA 6.2 NA 1.2 64.9 4.4 1.4 59.9 NA NA 473 <0.1 1250 NA GMW-6 11/01/2011 6.7 23.86 13 1463 1.27 7 212 2.09 NM NA 56.4 762 NA NA <5 NA <5 62.9 6.6 1 60.4 NA NA 458 <0.1 1240 NA GMW-6 04/03/2012 6.5 21.76 18 1173 2.96 -64 141 1.49 NM NA 36.8 2380 NA NA 2.7 j,b NA 1.7 j,b <50 6.1 0.86 85 NA NA <5 0.061 j,b 1400 NA GMW-6 DUP 04/03/2012 6.5 21.76 18 1173 2.96 -64 141 1.49 NM NA 37 2460 NA NA 3 j,b NA 1.5 j,b <50 6.2 0.87 82.8 NA NA 531 0.069 j,b 1280 NA GMW-6 11/07/2012 6.4 23.97 15 1375 1.47 168 373 1.5 NM NA 48.5 1160 NA NA 2.1 j,b NA 1.4 j,b <50 4.9 j,b 0.92 62.8 NA NA 580 <0.1 1380 NA GMW-6 04/09/2013 6.7 21.63 22 1652 4.14 11 216 1.26 NM NA 47 1260 NA NA <5 NA <5 <10 <5 0.83 77.3 NA NA 570 <0.2 1200 NA GMW-6 11/12/2013 6.7 23.53 16 1578 0.8 283 488 2.7 NM NA 48 1420 NA NA <5 NA <5 16 <5 0.89 82.4 NA NA 560 <0.2 1300 NA GMW-6 04/03/2014 6.7 20.14 16 1593 5.2 299 504 0.6 NM NA 43 1450 NA NA <5 NA <5 <10 <5 0.82 82.1 NA NA 420 <0.2 1400 NA GMW-6 11/10/2014 6.5 21.90 15 1318 0.73 111 316 1.35 NM NA 45 1160 NA NA <5 NA <5 <10 <5 0.93 77.3 NA NA 490 <0.2 1100 NA GMW-6 04/21/2015 6.6 19.42 19 1596 1.8 169 374 2.17 NM NA 38 1870 NA NA <5 NA <5 <10 <5 0.8 89.7 NA NA 540 <0.2 1200 NA GMW-6 07/01/2015 6.4 21.55 18 1552 0.79 13 361 2.48 NM NA NA NA NA 0.545 NA NA NA NA NA NA NA NA NA NA NA NA NA GMW-6 DUP 07/01/2015 6.4 21.55 18 1552 0.79 13 361 2.48 NM NA NA NA NA 0.542 NA NA NA NA NA NA NA NA NA NA NA NA NA GMW-6 09/14/2015 6.5 24.11 21 1563 1 102 307 3.97 0 <1 32 2460 NA NA <1 <1 <1 25 7 NA 94.3 102 1110 580 <0.2 1300 4.17 GMW-6 11/04/2015 6.4 22.00 17 1507 1.42 81 286 0.12 NM NA 50.5 876 NA NA 1.14 j NA <1 5.45 j 1.31 j 5.6 N1 73.2 NA NA 378 <0.133 1080 NA GMW-6 04/06/2016 6.9 20.62 16 1487 5.15 C 89 294 1.32 NM NA 54 736 NA NA <5 NA <5 3.01 j 1.26 j NA 68.3 NA NA 385 0.215 1140 NA MW-SD 05/27/2015 6.5 10.17 22 1476 1.08 71 276 1.2 0 <1 95 864 NA NA <1 1.46 <1 26 540 NA <1 94.6 704 680 <0.2 370 3.8 MW-5D 06/25/2015 6.6 9.90 21 1405 0.6 15 220 3.33 NM NA NA NA NA 0.015 NA NA NA NA NA NA NA NA NA NA NA NA NA MW-5D 09/13/2015 6.0 15.38 18 1191 0.6 93 298 2.07 0 <1 50 957 NA NA <1 <1 <1 97 203 NA <1 7.01 497 540 <0.2 1000 10 MW-SD 12/04/2015 6.8 8.60 12 1074 4.1 84 289 0.7 0 <1 39 936 2 NA 2.16 <1 <1 12 47 NA <1 6.16 451 500 <0.2 850 8.61 MW-SD 01/05/2016 7.1 8.06 6 1130 2.2 84 289 1 0 <1 41 950 0.15 NA <1 <1 <1 <10 57 NA <1 87.8 440 470 <0.2 900 9.23 MW-6D 05/29/2015 6.6 7.01 19 409 2.8 126 331 5.6 0 <1 9 <50 NA NA <1 <1 <1 122 41 NA <1 13.7 195 56 <0.2 260 5.16 MW-6D 06/25/2015 6.5 6.59 20 386 0.4 272 477 1.77 NM NA NA NA NA 0.161 NA NA NA NA NA NA NA NA NA NA NA NA NA MW-6D 09/13/2015 6.4 8.12 22 396 0.3 49 254 1.3 0 <1 7 <50 NA NA <1 <1 <1 19 10 NA <1 12.9 197 54 <0.2 250 6.01 MW-22D 06/20/2016 6.5 16.73 17 2175 1.51 43 248 8.04 0 <1 52 377 <0.03 NA <1 3.14 1.11 320 1250 1 0.939 416 48.2 1600 1400 <0.2 2200 3.79 B2 Prepared by: BER Checked by: CDE Notes: 0 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2011 ug/I = microgram per liter S.U. = Standard Unit mg/I = milligrams per liter Eh = Redox potential umhos/cm = micro mhos per centimeter mV = millivolts DUP = Duplicate DO = Dissolved Oxygen Deg C = Degree Celsius Spec Cond = Specific Conductance ORP = Oxidation Reduction Potential ft = feet NM = Not Measured Temp = Temperature NO = Not Detected NTU = nephelometric turbidity unit NE = Not Established 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. = NC DHHS Health Screening Level b = Analyte was detected in associated method blank. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. C = Associated midday/end of day field parameter calibration not within range. j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. NI = Nitrate analyzed on 11/5/15 but LCS and CCV recoveries were above the control limits (111%, 113%). Samples were re -analyzed on 11/6/15, but past the recommended 48 hour holding time. The original data from 11/5/15 is reported, with a possible high bias. z = Result is greater than the associated high calibration standard. Result is estimated. M6 = Matrix spike and Matrix spike duplicate recovery not evaluated against control limits due to sample dilution. P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-3 Transition Zone GW Exceedances Inc Prov BG.xlsx Page 3 of 3 TABLE 4-4 BEDROCK GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter PH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 10 700 4* 700 2 250 0.07^ 0.07^ 10 1* 1000 2 300 15 50 100 20 NE NE 250 0.2* Soo 0.3* 1000 Provisional Background 6.1-8.3 NE NE NE NE NE NE NE NE NE NE 1421 NE NE NE 125.2 0.116 0.116 11 29.49 NE NE 12035 NE 1677 4.676 NE 38.04 948 105.3 NE 608.8 4.286 NE Sample ID Sample Collection Date Field Parameters Analytical Results Background BG-1BR 06/10/2015 6.8 39.69 18 562 0.5 -63 142 8.4 NM <1 <1 21 <1 <50 <1 15 NA NA <1 1.44 <1 NA 225 <1 690 1.86 <1 36.4 183 28 <0.2 350 1.94 44 BG-1BR 09/12/2015 7.0 40.52 19 490 0.9 93 298 2.3 0.5 <1 <1 27 <1 <50 <1 13 NA NA <1 <1 <1 NA 374 <1 614 1.3 <1 24.6 160 20 <0.2 300 0.425 23 BG-1BR 12/05/2015 6.8 40.51 15 496 0.25 9 214 5.83 0 <0.5 <0.5 30 <0.2 <50 <0.08 11.7 <0.03 NA 0.71 <0.5 <1 NA 380 <0.1 420 1 <0.5 23 160 15 <0.1 297 <1 <10 BG-1BR O1/05/2016 6.8 39.96 14 469 0.35 66 271 7.91 0 <1 <1 33 <1 <50 <1 12 <0.03 NA 1.96 <1 <1 NA 375 <1 445 2.1 <1 21.9 163 21 <0.2 330 1.25 51 BG-1BR 04/07/2016 6.9 38.06 17 473 0.17 9 214 9.86 NM <1 <1 29 <1 <50 <1 13 0.035 NA <1 <1 <1 NA 139 <1 396 1.45 <1 23.5 166 20 <0.2 300 1.23 6 MW-10BR 05/27/2015 7.1 22.58 19 569 1.8 111 316 2.5 NM <1 <1 93 <1 <50 <1 17 NA NA <1 8.2 4.67 NA 33 <1 478 2.44 <1 36.5 194 40 <0.2 350 2.09 <5 MW-10BR 06/29/2015 7.3 22.79 18 581 2.02 298 503 4.01 NM NA NA NA NA NA NA NA NA 0.064 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10BR 09/12/2015 7.0 24.26 18 619 0.3 91 296 1.18 0 <1 <1 107 <1 <50 <1 16 NA NA <1 5.97 <1 NA 46 <1 840 <1 <1 37.6 201 40 <0.2 350 1.34 <5 MW-10BR 12/04/2015 7.1 23.80 14 570 0.34 129 334 0.65 0 <1 <1 107 <1 <50 <1 17 <0.03 NA <1 5.15 <1 NA 65 <1 811 <1 <1 37.5 196 41 <0.2 330 1.3 <5 MW-1OBR CUP 12/04/2015 7.1 23.80 14 570 0.34 129 334 0.65 0 <1 <1 102 <1 <50 <1 17 <0.03 NA <1 5.16 <1 NA 75 <1 656 <1 <1 37.3 190 39 <0.2 320 1.38 <5 MW-10BR O1/06/2016 6.8 23.31 12 567 0.48 24 229 0.61 0 <1 <1 120 <1 <50 <1 18 <0.03 NA <1 6.38 <1 NA 87 <1 752 <1 <1 36.7 196 42 <0.2 370 1.28 <5 MW-10BR 04/07/2016 7.0 22.14 16 583 0.34 145 350 0.39 NM <1 <1 112 <1 <50 <1 18 <0.03 NA <1 6.45 <1 NA 91 <1 481 <1 <1 37.2 181 41 <0.2 330 1.51 51 MW-13BR 05/30/2015 6.2 40.15 18 645 0.3 -141 64 3.5 2.5 <1 <1 323 <1 <50 <1 84 NA NA <1 3.97 <1 NA 4000 <1 1140 1.22 <1 35.6 409 30 <0.2 380 0.364 15 MW-13BR CUP 05/30/2015 6.2 40.15 18 645 0.3 -141 64 3.5 2.5 <1 <1 329 <1 <50 <1 84 NA NA <1 3.44 <1 NA 3320 <1 969 1.3 <1 35.2 416 30 <0.2 48 0.455 27 MW-13BR 09/13/2015 7.1 40.70 21 604 0.3 -85 120 6.07 2.5 <1 1.06 309 <1 <50 <1 76 NA NA <1 3.71 <1 NA 4130 <1 1080 1.06 <1 35.9 411 18 <0.2 370 0.819 101 MW-13BR 12/05/2015 6.5 40.25 15 587 0.36 -78 127 3.33 5 <0.5 1.3 330 <0.2 <50 <0.08 77.5 <0.03 NA <0.5 4.2 <1 NA 5900 <0.1 1300 0.78 <0.5 35.8 410 16.7 <0.1 390 <1 <10 MW-13BR O1/06/2016 6.2 39.95 10 590 0.57 -56 149 2.15 2,5 <1 1.06 349 <1 <50 <1 93 <0.03 NA <1 5.31 <1 NA 6080 <1 1200 1.07 <1 39.8 416 29 <0.2 420 0.398 32 MW-13BR CUP O1/06/2016 6.2 39.95 10 590 0.57 -56 149 2.15 2.5 <1 1.12 349 <1 <50 <1 92 <0.03 NA <1 5.5 <1 NA 6140 <1 1220 1.13 <1 34.9 417 29 <0.2 410 0.386 31 MW-13BR 04/07/2016 6.1 39.40 17 626 0.31 -48 157 2.2 NM <1 <1 380 <1 <50 <1 100 <0.03 NA <1 5.8 <1 NA 5030 <1 803 1.25 <1 36.8 427 33 <0.2 400 0.347 <5 MW-14BR 06/10/2015 7.0 48.49 20 662 0.8 -128 245 4 NM <1 <1 32 <1 <50 <1 40 NA NA <1 1.1 1.69 NA 898 <1 328 <1 <1 22 165 15 <0.2 370 0.444 54 MW-14BR DUP 06/10/2015 7.0 48.49 1 20 662 0.8 -128 209 4 NM I <1 <1 33 <1 1 <50 <1 41 NA NA <1 1.12 2.21 NA 871 <1 328 <1 <1 23 167 15 <0.2 360 0.465 62 MW-14BR 0911212015 7.4 49.47 1 18 638 0.1 -77 128 29.1 1.5 <1 <I 37 <1 <50 <1 40 NA NA 165 1.86 6.52 NA 2990 <1 395 84.7 <1 22.4 169 13 <0.2 370 1.84 23 MW-14BR 12/06/2015 7.1 50.32 15 631 0.48 -106 99 6.28 3 <0.5 <0.5 34 <0.2 <50 <0.08 41.9 <0.03 NA 2.8 0.94 1.9 NA 2200 <0.1 340 2.5 <0.5 25.4 180 11.3 <0.1 358 <1 17 MW-14BR O1/06/2016 7.0 49.95 7 618 0.88 70 275 6.18 0.5 <1 <1 38 <1 <50 <1 43 <0.03 NA 1.98 1.25 2.16 NA 1780 <1 291 1.8 <1 22.1 175 12 <0.2 390 0.362 45 MW-14BR 04/08/2016 7.2 47.00 16 630 0.52 -115 90 8.75 NM <1 <1 32 <1 <50 <1 41 <0.03 M1 NA 2.11 1.86 <1 NA 1160 <1 286 2.72 <1 22.2 159 13 <0.2 380 <0.3 5 MW-15BR 0611612015 7.6 9.61 24 564 0.4 -163 253 10.4 <0.5 <1 <1 19 <1 <50 <1 34 NA NA <1 <1 <1 NA 541 <1 36 1 1.39 <1 25.1 142 30 <0.2 340 0.503 38 MW-15BR 09/12/2015 8.3 11.66 21 497 0.5 -159 46 3 0 <1 <1 19 <1 <50 <1 34 NA NA <1 <1 <1 NA 456 <1 30 1.42 <1 32.9 110 26 <0.2 300 0.369 <5 MW-15BR 12/05/2015 8.2 9.05 14 430 0.27 -153 52 2.19 0 <0.5 0.59 15 <0.2 <50 <0.08 33.2 <0.03 NA <0.5 <0.5 <1 NA 230 <0.1 19 0.61 <0.5 36.1 90 19.7 <0.1 231 <1 <10 MW-15BR O1/05/2016 7.6 7.74 10 429 0.49 50 255 2.26 0 <1 <1 16 <1 <50 <1 34 <0.03 NA <1 <1 <1 NA 262 <1 10 <1 <1 35.3 92 22 <0.2 280 <0.3 <5 MW-15BR 04/07/2016 7.7 7.65 16 481 0.34 -199 6 7.3 NM <1 <1 18 <1 <50 <1 37 <0.03 NA 1.01 <1 <1 NA 637 <1 29 1.24 <1 34.1 72 25 <0.2 300 0.441 <5 MW-16BR 05/27/2015 7.0 30.14 19 504 0.5 -61 144 1 NM <1 <1 64 <1 <50 <1 12 NA NA <1 <1 <1 NA 106 <1 272 1.13 1 <1 18.8 166 26 <0.2 310 2.1 <5 MW-16BR 06/30/2015 6.9 30.46 19 508 1.91 309 514 1 7.29 NM NA NA NA NA NA NA NA NA 0.135 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-16BR 09/13/2015 6.9 31.97 18 532 0.3 0 205 3.92 0.5 <1 <1 69 <1 <50 <1 13 NA NA <1 <1 1.26 NA 275 <1 182 1.38 <1 19.1 174 28 <0.2 320 1.83 <5 MW-16BR 12/05/2015 6.9 31.59 17 500 0.54 37 242 3.88 0 <0.5 <0.5 76 <0.2 <50 <0.08 11.9 0.074 NA 1.1 <0.5 2.3 NA 170 0.11 170 1.5 <0.5 19.2 170 23.5 <0.1 293 2.5 <10 MW-16BR O1/06/2016 6.7 30.73 13 484 0.59 105 310 2.8 0 <1 <1 75 <1 <50 <1 13 0.099 NA <1 <1 1.28 NA 116 <1 138 1.22 <1 18.5 171 26 <0.2 310 3.08 <5 MW-17BR 06/16/2015 7.3 37.95 27 640 2 121 235 5.21 0 <1 <1 107 <1 <50 <1 15 NA NA <1 <1 <1 NA 118 <1 354 <1 <1 18.4 960 40 <0.2 370 0.968 18 MW-17BR 09/15/2015 7.2 39.69 23 631 0.6 10 215 6.16 0 <1 <1 110 <1 <50 <1 16 NA NA 1.17 <1 <1 NA 486 <1 328 1.13 <1 17.9 M4 945 41 <0.2 380 2.03 13 MW-17BR 12/06/2015 7.3 38.30 14 604 0.24 -52 153 9.87 <0.5 <0.5 <0.5 100 <0.2 <50 <0.08 15 <0.03 NA 2.2 <0.5 <1 NA 750 <0.1 320 1.7 <0.5 22.9 890 38.8 <0.1 370 <1 16 MW-17BR O1/06/2016 7.2 37.74 14 591 0.28 16 221 5.13 0.75 <1 <1 100 <1 <50 <1 15 <0.03 NA <1 <1 <1 NA 756 <1 359 <1 <1 18.5 917 39 <0.2 380 0.454 15 MW-17BR 0410812016 7.3 37.60 15 616 0.12 -158 47 9.94 NM <1 <1 97 <1 <50 <1 14 <0.03 NA 21.6 <1 1.18 NA 694 <1 341 12.2 <1 18.8 887 39 <0.2 390 0.658 45 MW-18BR 0610212015 7.5 46.22 18 784 0.4 -232 -27 9.6 0 <1 <1 77 <1 <50 <1 120 NA NA <1 20.1 <1 NA 95 <1 789 <1 <1 19 224 16 <0.2 530 0.931 36 MW-18BR 06/29/2015 8.0 46.29 18 802 1.26 22 227 4.33 NM NA NA NA NA NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-18BR 09/14/2015 8.0 47.15 18 739 0.3 -200 5 6.55 0 <1 <1 52 <1 <50 <1 130 NA NA 2.23 1.03 <1 NA 363 <1 475 <1 <1 20 209 3.7 <0.2 540 <0.3 <5 MW-18BR 12/05/2015 7.9 47.52 15 746 0.13 -190 15 7.64 1 <0.5 <0.5 49 <0.2 <50 <0.08 124 <0.03 NA 0.99 1.9 <1 NA 1000 <0.1 660 0.7 <0.5 19 230 1.5 <0.1 413 <1 <10 MW-18BR O1/05/2016 7.6 47.05 14 757 0.22 -127 78 5.56 1 <1 <1 62 <1 <50 <1 120 <0.03 NA 4.24 1.63 <1 NA 1260 <1 874 2.11 <1 18.8 232 5 <0.2 530 <0.3 7 MW-18BR 04/08/2016 8.3 45.44 14 765 0.18 30 235 4.68 NM <1 <1 51 <1 <50 <1 120 <0.03 NA <1 <1 <1 NA 1060 <1 819 <1 <1 20.3 213 11 <0.2 480 <0.3 <5 MW-18BR DU 04/08/2016 8.3 45.44 14 765 0.18 30 235 4.68 NM <1 <1 51 <1 <50 <1 120 <0.03 NA <1 <1 <1 NA 1050 <1 815 <1 <1 20.6 214 11 <0.2 490 <0.3 <5 Bedrock ABMW-1BR 05/28/2015 6.9 7.76 19 532 0.31 -154 51 2.6 1.25 <1 <1 32 <1 176 <1 13 NA NA <1 <1 <1 NA 1420 <1 881 1.18 <1 19.5 168 19 <0.2 330 <0.3 <5 ABMW-1BR 06/24/2015 6.8 7.52 21 509 1 -321 -116 2.44 NM NA NA NA NA NA NA NA NA 0.006 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-lBR 09/14/2015 7.4 7.96 22 532 0.5 112 317 3.39 1.5 <1 <1 30 <1 146 <1 13 NA NA <1 <1 <1 NA 1570 <1 938 <1 <1 19.4 169 20 <0.2 350 0.304 <5 ABMW-1 BR 12/04/2015 6.8 8.65 16 520 0.5 -153 52 2.4 1.5 <1 <1 31 <1 247 <1 15 <0.03 NA <1 1.74 <1 NA 1600 <1 945 <1 <1 19.7 178 20 <0.2 330 <0.3 <5 ABMW-1BR O1/06/2016 7.1 7.43 12 523 0.7 -98 107 3.11 2 <1 <1 32 <1 255 <1 14 <0.03 NA <1 1.12 <1 NA 1740 <1 944 <1 <1 17.7 176 20 <0.2 350 0.346 <5 ABMW-2BR 05/28/2015 7.9 9.19 21 570 0.1 -239 34 13.2 NM <1 <1 80 <1 <50 <1 27 NA NA 1.01 <1 1.71 NA 93 <1 2130 3.52 <1 25.3 497 73 <0.2 360 2.67 8 ABMW-2BR 06/24/2015 9.5 8.88 21 563 0.6 -268 1 -63 7.86 NM NA NA NA NA NA NA NA NA 0.011 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-2BR 09/14/2015 11.8 9.45 21 790 0.29 -230 -25 7.46 0 <1 <1 290 <1 <50 <1 23 NA NA 5.64 <1 1.24 NA 68 <1 29 1.16 <1 39.7 2740 52 <0.2 360 2.67 <5 ABMW-2BR 12/05/2015 12.1 8.74 15 121 0.51 -166 39 2.68 0 <0.5 0.77 370 <0.2 <50 <0.08 25.4 <0.03 NA 1.9 <0.5 <1 NA 51 <0.1 84 0.99 <0.5 34.5 1700 59.1 <0.1 354 2.1 <10 ABMW-2BR O1/06/2016 11.4 8.60 13 1001 3.35 -31 174 9.89 0 <1 <1 280 <1 <50 <1 31 <0.03 NA 1.41 <1 <1 NA 262 <1 868 <1 <1 27 958 90 <0.2 340 1.44 <5 ABMW-3BR 05/26/2015 5.9 23.90 24 4154 0.48 41 246 8.4 <0.5 <1 1.19 51 3.66 4060 <1 13 NA NA 1.94 369 5.08 NA 6720 <1 18800 385 <1 281 2100 3400 0.721 4300 2.79 109 Ll ABMW-3BR 06/24/2212 5.8 23.77 22 3927 0.5 -39 166 3.17 5.5 NA NA NA NA NA NA NA NA <0.003 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-3BR 09/14/2015 6.0 24.72 19 3798 0.4 105 310 7.64 6 <1 1.66 27 17.3 3850 <1 14 NA NA 1 1.21 755 1.82 NA 20400 <1 30000 808 <1 154 2190 3100 <0.2 4100 4.02 641 P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\39.EG_CSASUP\Tables\Table 4-4 Bedrock GW Exceedances Inc Prov BG.xlsx Page 1 of 5 TABLE 4-4 BEDROCK GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter PH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 10 700 4* 700 2 250 0.07^ 0.07^ 10 1* 1000 2 300 15 50 100 20 NE NE 250 0.2* Soo 0.3* 1000 Provisional Background 6.1-8.3 NE NE NE NE NE NE NE NE NE NE 1421 NE NE NE 125.2 0.116 0.116 11 29.49 NE NE 12035 NE 1677 4.676 NE 38.04 948 105.3 NE 608.8 4.286 NE Sample ID Sample Collection Date Field Parameters Analytical Results ABMW-3BRL 06/22/2016 7.9 43.35 20 1117 3.08 -191 14 9.6 0.5 <1 <1 33 <1 132 <1 12 <0.03 NA 6.16 1.48 <1 NA 565 <1 236 3.74 <1 54.5 711 440 <0.2 890 0.573 <5 ABMW-4BR 05/28/2015 6.9 30.98 26 379 0.6 -185 20 9.3 1.5 <1 <1 99 <1 <50 <1 8.1 NA NA <1 1.14 <1 NA 2180 <1 2450 <1 <1 19.8 180 15 <0.2 250 0.391 7 ABMW-4BR 06/30/2015 6.9 32.80 19 413 0.2 -186 19 9.15 NM NA NA NA NA NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-4BR 09/15/2015 7.2 33.29 18 431 0.4 -150 55 8.72 2.6 <1 <1 265 <1 <50 <1 8.2 NA NA <1 <1 <1 NA 13400 <1 4930 <1 <1 19.6 194 2.1 <0.2 220 0.522 32 ABMW-4BR 12/03/2015 7.0 31.80 30 403 0.7 122 327 7.12 3.5 <1 <1 213 <1 <50 <1 8.1 <0.03 NA <1 <1 <1 NA 11400 <1 3610 <1 <1 19.8 186 0.88 <0.2 220 0.366 20 ABMW-4BR 01/07/2016 6.9 29.90 11 433 0.49 18 223 2.96 1.5 <1 <1 146 <1 <50 <1 8.2 <0.03 NA <1 <1 <1 NA 18600 <1 3010 <1 <1 22.5 182 1.4 <0.2 230 <0.3 12 ABMW-6BR 03/26/2015 7.0 11.50 19 584 0.5 87 1 292 4.78 1 0 <1 <1 1 45 <1 <50 1 <1 11 NA NA 1.27 1.66 1.18 NA 393 <1 2000 3.04 <1 19.5 247 48 <0.2 220 4.03 <5 ABMW-6BR 06/25/2015 6.9 12.80 20 585 0.9 268 473 8.59 NM NA NA NA NA NA NA NA NA 0.009 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-6BR 09/13/2015 6.9 14.07 19 586 0.4 -28 177 2.96 0 <1 <1 81 <1 <50 <1 8.7 NA NA <1 <1 <1 NA 127 <1 2630 4.68 <1 10.6 206 58 <0.2 350 0.629 <5 ABMW-6BR 12/03/2015 6.7 12.22 16 561 0.41 67 272 0.81 0 <1 <1 60 <1 <50 <1 9.7 <0.03 NA <1 <1 <1 NA 89 <1 2080 2.92 <1 17.2 206 55 <0.2 330 <0.3 <5 ABMW-6BR 01/06/2016 6.8 11.56 14 538 0.31 10 215 2.94 0.5 <1 <1 61 <1 <50 <1 9.8 <0.03 NA <1 <1 <1 NA 167 <1 1710 3.33 <1 19.4 208 58 <0.2 400 0.308 <5 ABMW-7BR 05/27/2015 6.9 14.95 20 690 0.21 -107 98 4.4 NM <1 <1 21 <1 659 <1 13 NA NA <1 <1 <1 NA 305 <1 449 <1 <1 19.1 248 150 <0.2 460 0.628 <5 ABMW-7BR 06/29/2015 6.8 15.04 19 709 0.9 -169 36 1.82 NM NA NA NA NA NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-7BR 09/14/2015 6.9 17.17 21 705 0.5 -93 112 0.15 0.5 <1 <1 18 <1 823 <1 13 NA NA <1 <1 <1 NA 361 <1 455 <1 <1 17.1 246 140 <0.2 480 0.322 <5 ABMW-7BR 12/03/2015 6.9 14.85 15 684 0.45 -143 63 0.53 0 <1 <1 17 <1 884 <1 13 <0.03 NA <1 <1 <1 NA 282 <1 437 <1 <1 16 240 140 <0.2 470 <0.3 <5 ABMW-7BR 01/07/2016 6.7 13.92 12 654 0.7 -61 144 0.89 0.5 <1 <1 17 <1 902 <1 14 <0.03 NA <1 <1 <1 NA 307 <1 432 <1 <1 17 246 I50 <0.2 480 <0.3 <5 ABMW-7BRL 06/21/2016 7.1 22.73 21 691 1.09 -118 87 6.09 0.5 <1 1.66 17 <1 245 <1 18 <0.03 NA <1 <1 <1 NA 253 <1 57 <1 <1 44.1 729 140 <0.2 490 0.443 <5 CW-1 11/30/2010 6.9 25.87 15 617 NM NM NM 104 NM <0.5 <5 438 NA <50 0.097 53 NA NA 16.9 NA 20.8 NA 2290 <5 180 10.4 <10 NA NA 67.4 <0.1 392 NA <10 CW-1 04/20/2015 6.3 20.69 19 537 2.8 300 505 4.68 NM <1 <1 71 <1 <50 <1 9.6 NA NA <5 <1 <5 NA 108 <1 13 <5 5.26 60.5 NA 180 0.212 400 NA <5 CW-1 07/08/2015 6.4 22.42 21 506 2.8 127 332 2.78 NM <1 <1 69 <1 <50 <1 11 NA NA <5 <1 <5 NA 168 <1 26 <5 5.17 57.1 NA 160 <0.2 380 20.8 <5 CW-1 09/15/2015 6.2 24.25 20 504 2.5 97 302 2.31 NM <1 <1 69 <1 <50 <1 15 NA NA <1 <1 <1 NA 44 <1 <5 <1 6.47 51.3 261 160 0.737 380 25.4 <5 CW-1 11/05/2015 6.6 24.23 20 503 0.4 5 210 2.1 NM <1 <1 74 <1 <50 1 <1 14 NA NA <5 <1 <5 NA 37 <1 49 <5 4.94 59.2 276 150 <0.2 400 22.7 <5 CW-1 12/04/2015 6.3 22.96 13 452 0.44 10 215 1.2 4.5 <1 <1 75 <1 <50 <1 13 <0.03 NA <1 2.61 1.76 NA 1840 <1 211 1.72 1.8 58.1 267 140 <0.2 350 19.4 <5 CW-1 01/06/2016 6.5 21.64 8 575 1.6 -71 134 5.6 1.5 <1 <1 82 <1 <50 <1 10 <0.03 NA <1 1.29 1.62 NA 1400 <1 153 <1 <1 71.8 303 170 <0.2 430 14.8 <5 CW-1 04/07/2016 6.4 20.36 18 499 0.31 100 305 28.7 NM <1 <1 94 <1 <50 <1 16 NA NA <5 1.02 11 NA 1160 <1 115 <5 1.59 57.6 283 130 <0.2 350 14.3 <5 CW-21) 11/29/2010 7.0 13.78 18 577 NM NM NM 7.68 NM <0.5 <5 115 NA <50 0.11 14.4 NA NA 18.6 NA 12.8 NA 224 <5 24.9 10.8 <10 NA NA 70.5 <0.1 339 NA 34.3 CW-21) 04/19/2011 6.6 12.70 17 543 2.27 -30 175 9.66 NM <0.5 <5 140 NA <50 <0.08 13.5 NA NA <5 NA <5 NA 382 <5 14.7 <5 <10 NA NA 62.2 <0.1 343 NA <10 CW-2D 09/15/2015 6.8 15.06 17 618 2.3 52 257 4.97 0 <1 <1 153 <1 <50 <1 19 NA NA <1 <1 <1 NA 110 <1 <5 <1 <1 34.3 M4 298 110 <0.2 410 13.5 <5 CW-2D 11/05/2015 6.2 13.43 17 2 10 69 274 1.54 NM <1 <1 174 <1 <50 <1 16 NA NA <5 <1 <5 NA 45 <1 6 <5 <1 37.4 293 100 <0.2 420 11.1 <5 CW-21) 04/07/2016 7.0 12.70 15 628 4.27 133 338 0.56 NM <1 <1 151 <1 <50 <1 19 NA NA <5 <1 <5 NA <10 <1 <5 <5 <1 35 305 120 <0.2 400 12.7 <5 CW-21) DUP 04/07/2016 7.0 12.70 15 628 4.27 133 338 0.56 NM <1 <1 149 <1 <50 <1 19 NA NA <5 <1 <5 NA <10 <1 <5 <5 <1 35.2 309 120 <0.2 400 12.8 <5 CW-31) 11/30/2010 7.8 3.63 16 588 NM NM NM 8.69 NM <0.5 <5 33.2 NA <50 <0.08 28.6 NA NA <5 NA <5 NA 90.4 <5 116 <5 <10 NA NA 28.7 <0.1 353 NA <10 CW-31) 04/19/2011 7.5 1.11 19 510 2.68 -31 174 2.1 NM 0.65 <5 38.1 NA <50 <0.08 27.2 NA NA <5 NA <5 NA 53.6 <5 86.6 <5 <10 NA NA 31.2 1 <0.1 237 NA <10 CW-31) 07/13/2011 7.5 3.00 23 544 0.52 -150 55 0.92 NM <0.5 <5 52.1 b NA <50 <0.08 26.4 b NA NA <5 NA <5 NA 456 b <5 325 <5 <10 NA NA 29.5 b <0.1 329 b NA <10 CW-31) 11/02/2011 7.7 2.57 17 529 0.48 -211 -6 3.69 NM <0.5 <5 55.2 NA <50 <0.08 26.6 NA NA <5 NA <5 NA 844 <5 416 <5 <10 NA NA 27.2 <0.1 400 b NA <10 CW-3D 04/02/2012 7.5 1.30 18 498 1.07 -152 53 6.98 NM <0.5 <5 46.1 NA <50 <0.08 27 NA NA <5 NA <5 NA 710 <5 179 <5 <10 NA NA 26.1 <0.1 328 NA <10 CW-3D 07/11/2012 7.5 3.20 20 524 2.19 -47 158 5.69 NM <0.5 <5 43.8 NA <50 <0.08 26.5 NA NA <5 NA <5 NA 286 <5 84.8 <5 <10 NA NA 29.6 <0.1 332 NA <10 CW-31) 11/07/2012 7.6 2.95 13 519 1.81 -101 104 2.64 NM <0.5 <5 51.1 NA <50 <0.08 26.1 NA NA <5 NA <5 NA 599 <5 159 <5 <10 NA NA 31.7 <0.1 332 NA 51.5 CW-31) 04/08/2013 7.3 1.40 19 550 1.89 -114 91 9.72 NM <1 1.02 43 NA <50 <1 23 NA NA <5 NA <5 NA 291 <1 130 <5 <1 NA NA 28 <0.2 340 NA <5 CW-31) 11/11/2013 7.4 1.89 16 538 0.7 184 389 3.7 NM <1 <1 57 NA <50 <1 23 NA NA <5 NA <5 NA 284 <1 118 <5 <1 NA NA 30 <0.2 350 NA <5 CW-31) 04/04/2014 7.7 1.70 14 487 5.9 253 458 4.3 NM <1 <1 46 NA <50 <1 26 NA NA <5 NA <5 NA 215 <1 59 <5 <1 NA NA 31 <0.2 330 NA <5 CW-31) 07/15/2014 7.6 3.04 25 536 1.41 116 321 4.77 NM <1 <1 57 NA <50 <1 24 NA NA <5 NA <5 NA 275 <1 65 <5 <1 NA NA 32 <0.2 340 NA <5 CW-31) 11/11/2014 7.5 2.55 20 552 0.38 181 386 5.08 NM <1 <1 59 NA <50 <1 24 NA NA <5 NA <5 NA 174 <1 52 <5 <1 NA NA 33 <0.2 330 NA 7 CW-3D 07/08/2015 7.5 2.40 22 534 1.5 38 243 5.19 NM <1 <1 147 <1 <50 <1 23 NA NA <5 <1 <5 NA 11 <1 <5 <5 <1 54.1 NA 33 <0.2 340 3.46 <5 CW-3D 09/16/2015 7.8 10.98 16 548 2.3 75 280 5.28 NM <1 <1 62 <1 <50 <1 23 NA NA <1 <1 <1 NA 58 <1 12 <1 <1 18.7 260 33 <0.2 <25 3.17 <5 CW-31) 11/04/2015 7.5 2.10 19 534 0.3 38 243 4.08 1 NM <1 <1 43 <1 <50 <1 25 NA NA <5 <1 <5 NA 83 <1 48 <5 <1 18.1 267 32 <0.2 350 1.66 <5 CW-31) 04/07/2016 7.5 1.78 14 555 0.42 162 367 6.84 NM <1 <1 62 <1 <50 <1 25 NA NA <5 <1 <5 NA 281 <1 247 <5 <1 19.1 285 32 <0.2 320 1.65 <5 GMW-7 12/19/2002 6.7 30.64 NM 453 NM NM NM NM NM NA <5 580 NA NA <2 66.7 NA NA <5 NA 5 0.19 831 <5 154 NA <2 NA NA 64 NA 384 NA 29 GMW-7 11/12/2003 NM NM NM 648 NM NM NM NM NM NA <5 430 NA NA <2 67.9 NA NA <5 NA 3 0.28 271 <5 10 NA 4 NA NA 549 NA 431 NA 6 GMW-7 05/25/2004 NM NM NM 623 NM NM NM NM NM NA <5 654 NA NA <2 71.4 NA NA 49 NA 5 0.2 983 <5 34 NA 4 NA NA 36.6 NA 362 NA 8 GMW-7 11/17/2004 6.3 35.00 NM 612 NM NM NM NM NM NA <5 481 NA NA <2 67 NA NA 47.3 NA 8 0.22 693 <5 30 NA 4 NA NA 35.2 NA 365 NA 8 GMW-7 05/18/2005 6.2 28.70 NM 1590 NM NM NM NM NM NA <3 489 NA NA <2 110 NA NA 824 NA 12 0.28 3720 41 32 NA 4 NA NA 31.9 NA 426 NA 27 GMW-7 11/16/2005 6.0 30.30 NM 482 NM NM NM NM NM NA <5 506 NA NA <2 60.2 NA NA 226 NA 44 0.27 1360 <3 17 NA <5 NA NA 27.7 NA 354 NA 5 GMW-7 05/22/2006 5.5 29.85 NM 601 NM NM NM NM NM NA 32 145 NA NA 14 54.6 NA NA <5 NA 9 0.27 6620 <5 2540 NA 370 NA NA 19.1 NA 350 NA 256 GMW-7 11/15/2006 7.6 28.00 NM 671 NM NM NM NM NM NA <3 515 NA NA <2 46.6 NA NA 38 NA 2 0.26 1590 <5 IS NA 3 NA NA 28.6 NA 340 NA <10 GMW-7 05/23/2007 6.2 34.40 NM 486 NM NM NM NM NM NA <3 836 NA NA <2 90.3 NA NA 80 NA 5 0.193 398 <5 <10 NA 8 NA NA 61.2 NA 448 NA 203 GMW-7 11/06/2007 6.2 34.40 NM 676 NM NM NM NM NM NA 3 1000 NA NA <2 82.4 NA NA 79 NA <2 0.26 486 <5 <10 NA 9 NA NA 33.8 NA 418 NA 376 GMW-7 05/22/2008 6.3 35.20 NM 660 NM NM NM NM NM NA <2 506 NA NA <0.5 62 NA NA 143 NA 1.5 0.24 2260 <2 14.1 NA <2 NA NA 39 NA 390 NA 1.6 GMW-7 05/07/2009 6.4 33.80 NM 880 NM NM NM NM NM NA 3.2 366 NA 1250 0.12 96 NA NA 43.4 NA <0.81 0.28 466 2.5 9 52.1 <3.4 NA NA 130 1 5.2 580 NA 3.9 GMW-7 11/10/2009 6.1 34.15 NM 840 NM NM NM NM NM NA <2.8 196 NA 1430 <0.36 92 NA NA 52.1 NA <1.6 0.23 444 2.3 10.6 54.6 <2.7 NA NA 100 5.2 510 NA 5.4 GMW-7 OS/26/2210 6.0 31.61 NM 817 NM NM NM NM NM NA 2.1 127 NA 1560 <0.02 106 NA NA 58.4 NA 1.7 0.17 274 <0.5 7.9 40.2 7.7 NA NA 93.5 <3 527 NA 7.7 GMW-7 11/18/2010 7.2 26.26 17 1008 NM NM NM 23.9 NM NA <0.5 252 NA 612 <0.08 59.5 NA NA 17.4 NA 2 <0.5 593 0.16 27.2 11.1 1 0.73 NA NA 1 60.9 <10 1 563 NA 15 P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment P1an\19.EG_CSAS1JP\Tab1es\Tab1e 4-4 Bedrock GW Exceedances Inc Prov BG.xlsx Page 2 of 5 TABLE 4-4 BEDROCK GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter PH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 10 700 4* 700 2 250 0.07A 0.07A 10 1* 1000 2 300 15 50 100 20 NE NE 250 0.2* Soo 0.3* 1000 Provisional Background 6.1-8.3 NE NE NE NE NE NE NE NE NE NE 1421 NE NE NE 125.2 0.116 0.116 11 29.49 NE NE 12035 NE 1677 4.676 NE 38.04 948 105.3 NE 608.8 4.286 NE Sample ID Sample Collection Date Field Parameters Analytical Results GMW-7 11/08/2012 6.9 30.77 17 560 3.03 147 352 2.13 NM NA <5 216 NA 179 <0.08 74.3 NA NA 1.81 NA 1.1 j,b <0.5 59.2 B <5 2.9 j,b <5 <10 NA NA 96.2 <0.1 532 NA 5.8 j,b GMW-7 11/12/2013 6.8 30.58 14 862 2.6 166 371 4.7 NM NA <1 184 NA 818 <1 71 NA NA 8 NA <5 <1 156 <1 6 <5 <1 NA NA 120 <0.2 620 NA 6 GMW-7 09/15/2015 6.6 29.97 21 1025 2.1 84 289 2.43 0 <1 <1 175 <1 1060 <1 96 NA NA <1 <1 <1 NA 79 <1 <5 <1 <1 71.3 432 120 0.27 660 6.47 <5 GMW-7 04/06/2016 6.6 23.48 16 1297 2.48 215 420 3.49 NM NA 0.09311 294 NA 1330 <1 114 NA NA 0.786j NA <5 0.174 142 <1 4.021 0.617j 11.6 NA NA 373 <0.2 916 NA <5 GMW-8 12/19/2002 7.0 49.69 NM 1260 NM NM NM NM NM NA <5 54 NA NA <2 66.2 NA NA <5 NA 2 0.2 187 <5 449 NA <2 NA NA 231 NA 995 NA 25 GMW-8 05/29/2003 7.0 46.22 NM 1340 NM NM NM NM NM NA <5 59 NA NA <2 80.6 NA NA <5 NA <5 0.11 110 <5 122 NA 12 NA NA 329 NA 1220 NA 6 GMW-8 11/12/2003 NM NM NM 1500 NM NM NM NM NM NA <5 53 NA NA <2 85.9 NA NA <5 NA 3 0.14 68 <5 156 NA 15 NA NA 586 NA 1300 NA 7 GMW-8 05/25/2004 NM NM NM 1760 NM NM NM NM NM NA 8 76 NA NA <2 90.5 NA NA <5 NA 3 0.11 324 <5 290 NA 23 NA NA 625 NA 1360 NA 6 GMW-8 11/17/2004 6.6 48.75 NM 1820 NM NM NM NM NM NA 6 61 NA NA <2 99.1 NA NA <5 NA 7 0.11 203 <5 263 NA 17 NA NA 529 NA 1570 NA 6 GMW-8 05/18/2005 6.6 43.35 NM 1600 NM NM NM NM NM NA 3 47 NA NA <2 Ill NA NA <5 NA 4 0.15 847 126 128 NA 13 NA NA 430 NA 1350 NA 22 GMW-8 11/16/2005 6.3 45.40 NM 1300 NM NM NM NM NM NA <5 45 NA NA <2 113 NA NA <5 NA 4 0.17 50 <3 129 NA <5 NA NA 359 NA 1010 NA 5 GMW-8 05/22/2006 6.0 45.85 NM 1560 NM NM NM NM NM NA <3 174 NA NA <2 120 NA NA <5 NA <2 0.16 676 <5 82 NA 10 NA NA 400 NA 1150 NA 150 GMW-8 11/15/2006 6.5 45.56 NM 1740 NM NM NM NM NM NA 3 55 NA NA <2 120 NA NA 5 NA <2 0.11 1080 <5 103 NA 13 NA NA 394 NA 975 NA <10 GMW-8 05/23/2007 6.6 50.00 NM 1500 NM NM NM NM NM NA <3 230 NA NA <2 124 NA NA 11 NA 4 0.11 540 <5 58 NA 12 NA NA 375 NA 1220 NA 116 GMW-8 11/06/2007 6.6 50.00 NM 1810 NM NM NM NM NM NA 6 464 NA NA <2 115 NA NA 9 NA 7 0.14 1210 <5 57 NA 16 NA NA 420 NA 1180 NA 304 GMW-8 05/22/2008 6.6 54.30 NM 1700 NM NM NM NM NM NA <2 48.4 NA NA <5 120 NA NA <2 NA 1.2 0.12 <20 <2 48.4 NA <2 NA NA 390 NA 1200 NA 3 GMW-8 11/19/2008 6.7 52.91 NM 1700 NM NM NM NM NM NA <2.8 49.1 NA NA <0.36 100 NA NA <1 NA <1.6 0.12 <22 <1.9 47.6 NA <2.7 NA NA 380 NA 1200 NA <3.8 GMW-8 05/07/2009 6.8 52.12 NM 1700 NM NM NM NM NM NA <2.8 49.8 NA 2750 0.2 97 NA NA <0.7 NA <0.81 0.17 <31 3.4 36.3 1.4 <3.4 NA NA 410 6.8 1300 NA 5.6 GMW-8 11/10/2009 6.7 52.45 NM 1800 NM NM NM NM NM NA <2.8 38.5 NA 2360 <0.36 87 NA NA 2 NA <1.6 0.18 <22 <1.9 28.8 <1.8 <2.7 NA NA 390 <4.8 1300 NA 7 GMW-8 05/24/2010 6.3 49.30 NM 1840 NM NM NM NM NM NA 0.91 48.3 NA 2660 0.08 73.8 NA NA <0.5 NA 3700 0.1 <4.5 <0.1 36 1 <1.7 2.7 NA NA 472 <3 1400 NA 7.8 GMW-8 11/17/2010 7.1 42.95 19 1782 NM NM NM 2.9 NM NA <0.5 51 NA 2590 <0.08 71.9 NA NA 23.8 NA 2.5 3.3 168 0.11 80.6 14.4 <0.5 NA NA 499 <10 1330 NA 9.6 GMW-8 04/19/2011 6.5 44.09 18 1572 2.24 -38 167 4.11 NM NA <5 54.4 NA 1870 0.092 74.7 NA NA 8.6 NA 19.2 <0.5 71.3 <5 30.5 5.2 <10 NA NA 348 <0.1 1210 NA 49.3 GMW-8 DUP 04/19/2011 6.5 44.09 18 1572 2.24 -38 167 4.11 NM NA <5 53.4 NA 1900 0.11 74.5 NA NA 8.2 B NA 21.6 <0.5 74 <5 31 5.8 <10 NA NA 346 <0.1 1230 NA 55.4 GMW-8 11/01/2011 6.9 45.97 19 1368 0.52 -32 173 6.47 NM NA <5 48.5 NA 1970 <0.08 80.1 NA NA 7.7 NA <5 <0.5 166 <5 33.9 5.9 <10 NA NA 387 <0.1 1190 NA <10 GMW-8 04/03/2012 6.4 46.26 18 1245 0.57 -55 I50 6.91 NM NA <5 43.4 NA 1980 0.071I 82.1 NA NA 8.8 B NA 3.4 j,b <0.5 203 <5 25.8 B 5.3 <10 NA NA 279 0.099 j,b 1160 NA 11.8 B GMW-8 11/08/2012 6.6 47.59 15 1423 1.83 189 394 8.22 NM NA <5 48.6 NA 1750 0.033I 76 NA NA 4.4 j,b NA 3.6 j,b <0.5 126 B I <5 36.7 <5 <10 NA NA 316 <0.1 1120 NA 13.1 B GMW-8 04/09/2013 6.5 47.24 17 1590 0.52 125 330 1 2.06 NM NA <1 41 NA 1680 <1 73 NA NA <5 NA <5 <1 21 <1 30 <5 <1 NA NA 340 <0.2 1100 NA 29 B GMW-8 11/12/2013 6.6 46.12 14 1742 0.23 153 358 8.5 NM NA <1 53 NA 2460 <1 67 NA NA <5 NA <5 <1 230 <1 46 <5 <1 NA NA 460 <0.2 1300 NA 24 GMW-8 04/03/2014 6.6 45.78 19 1865 0.4 228 433 9.8 NM NA <1 51 NA 2680 <1 78 NA NA <5 NA <5 <1 195 B <1 41 <5 <1 NA NA 560 1 <0.2 1400 NA 30 B GMW-8 11/10/2014 6.6 45.01 18 2014 0.2 135 340 6.25 NM NA <1 56 NA 3060 <1 190 NA NA <5 NA <5 <1 127 B <1 46 <5 <1 NA NA 670 <0.2 1700 NA 64 GMW-8 04/21/2015 6.5 44.80 17 2857 0.3 157 362 5.53 NM NA <1 69 NA 4050 <1 300 NA NA <5 NA <5 <1 332 <1 62 <5 <1 NA NA 780 <0.2 2100 NA 31 GMW-8 09/15/2015 6.5 45.99 18 2625 0.9 96 301 4.99 0 1.44 <1 64 <1 4240 <1 290 NA 0.0151 <1 <1 2.84 NA 78 <1 62 <1 1.03 87.3 1390 770 <0.2 2000 1.84 102 GMW-8 11/05/2015 6.5 46.39 19 2809 0.4 99 304 5.03 NM NA 0.452j 65.4 NA 4710 <0.101 305 B2 NA NA 0.777j NA <1 0.399j 100 0.0757j 64.2 2.33j 0.267j NA NA 823 <0.133 2090 NA 8.52 GMW-8 04/06/2016 6.5 45.38 17 2602 0.28 227 1 432 1 4.91 NM NA 0.217j 61.7 NA 5350 <1 273 NA NA <5 NA <5 <I 69.7 0.0744j 61 <5 0.103j NA NA 768 0.144j 2050 NA 7.97 GMW-9 12/19/2002 6.9 28.19 NM 230 NM NM NM NM NM NA <5 126 NA NA <2 18.3 NA NA <5 NA 9 0.11 7890 <5 266 NA <2 NA NA 18 NA 166 NA 48 GMW-9 05/28/2003 6.2 25.80 NM 1570 NM NM NM NM NM NA <5 66 NA NA <2 17.1 NA NA <5 NA <5 0.11 311 <5 27 NA <2 NA NA 25 NA 200 NA <5 GMW-9 11/12/2003 NM NM NM 197 NM NM NM NM NM NA <5 85 NA NA <2 14.3 NA NA 34 NA 5 0.13 2440 <5 144 NA <2 NA NA <5 NA 199 NA 18 GMW-9 11/17/2010 6.7 23.02 16 153 NM NM NM 4.4 NM NA <0.5 30.5 NA <50 <0.08 5.8 NA NA 11.4 NA 0.7600001 <0.5 102 <0.1 3.9 8.4 <0.5 NA NA 13.7 <10 142 NA 6 GMW-9 09/14/2015 6.0 23.81 16 222 8 124 329 0.67 0 <1 <1 51 <1 <50 <1 4.9 NA NA <1 <1 <1 NA 13 1 <1 <5 <1 <1 22.7 121 39 0.259 200 3.24 <5 GMW-10 12/19/2002 6.8 34.88 NM 776 NM NM NM NM NM NA <5 227 NA NA <2 28.2 NA NA 11 NA 18 0.14 6680 <5 264 NA 2 NA NA 1720 NA 619 NA 76 GMW-10 05/28/2003 6.2 30.14 NM 208 NM NM NM NM NM NA <5 131 NA NA <2 24.7 NA NA <5 NA <5 0.14 513 <5 98 NA 4 NA NA 256 NA 622 NA 7 GMW-10 11/12/2003 NM NM NM 548 NM NM NM NM NM NA <5 143 NA NA <2 22.9 NA NA 6 NA 8 0.18 2780 <5 148 NA 3 NA NA 132 NA 380 NA 29 GMW-SO 05/25/2004 NM NM NM 510 NM NM NM NM NM NA <5 199 NA NA 119 20 NA NA <5 NA 3 0.13 926 <5 79 NA 3 NA NA 147 NA 388 NA 9 GMW-10 11/17/2004 6.1 36.75 NM 475 NM NM NM NM NM NA <5 91 NA NA <2 23.5 NA NA <5 NA 7 0.14 1030 <5 71 NA 2 NA NA 95.2 NA 338 NA 8 GMW-10 05/18/2005 6.0 32.86 NM 408 NM NM NM NM NM NA <3 88 NA NA <2 20 NA NA <5 NA 5 0.16 1050 <5 71 NA <2 NA NA 86.2 NA 338 NA 34 GMW-10 11/16/2005 5.8 33.65 NM 289 NM NM NM NM NM NA <5 119 NA NA <2 20.5 NA NA 10 NA 6 0.17 2820 1 <3 127 NA <5 NA NA 76.4 NA 251 NA 35 GMW-SO 05/22/2006 5.5 35.77 NM 248 NM NM NM NM NM NA <3 219 NA NA <2 16.6 NA NA <5 NA <2 0.17 793 <5 57 NA <2 NA NA 46 NA 218 NA 139 GMW-10 11/15/2006 7.2 34.45 NM 333 NM NM NM NM NM NA <3 80 NA NA <2 15.2 NA NA 6 NA <2 0.18 709 <5 63 NA <2 NA NA 44.5 NA 251 NA <10 GMW-10 11/06/2007 6.1 37.60 NM 362 NM NM NM NM NM NA <3 482 NA NA <2 15.4 NA NA 16 NA <2 0.15 799 <5 54 NA <2 NA NA 44.5 NA 234 NA 312 GMW-10 05/22/2008 6.1 36.95 NM 350 NM NM NM NM NM NA <2 83.3 NA NA <0.5 11 NA NA <2 NA 1.2 0.15 531 <2 42.1 NA <2 NA NA 53 NA 240 NA 3.5 GMW-10 05/07/2009 6.5 36.42 NM 360 NM NM NM NM NM NA <2.8 90 NA 412 0.18 14 NA NA 0.8 NA <0.81 0.24 477 <1.6 1 41.9 2.3 <3.4 NA NA 61 <2.8 250 NA 5.6 GMW-10 11/10/2009 6.2 37.40 NM 330 NM NM NM NM NM NA <2.8 78.2 NA 345 1 <0.36 13 NA NA <1 NA <1.6 0.2 317 <1.9 31.4 <1.8 <2.7 NA NA 48 <4.8 250 NA 6.1 GMW-10 04/19/2011 5.9 29.03 18 207 6.22 16 221 1 4.13 NM NA <5 66.9 NA 59.9 B <0.08 17.6 NA NA 14.6 NA 7.8 <0.5 432 <5 10.8 21.5 <10 NA NA 16.8 <0.1 176 B NA 24.5 GMW-10 11/01/2011 6.3 32.89 23 243 3.88 -33 172 9.92 NM NA <5 76.5 NA 93.2 0.12 15 NA NA 20.5 NA <5 <0.5 547 <5 9.5 13.7 <10 NA NA 15.1 <0.1 223 NA 11.8 GMW-10 11/12/2013 6.0 30.90 17 252 4.5 256 461 7.4 NM NA <1 75 NA 57 <1 16 NA NA <5 NA <5 0.19 326 <1 6 <5 <1 NA NA 26 <0.2 200 NA 31 GMW-10 DUP 11/12/2013 6.0 30.90 17 252 4.5 256 461 7.4 NM NA <1 74 NA 80 <1 16 NA NA <5 NA <5 0.2 303 <1 6 <5 <1 NA NA 25 <0.2 210 NA 31 GMW-10 09/15/2015 5.8 31.99 21 260 3.9 125 330 1.49 0 <1 <1 65 <1 <50 <1 20 NA NA <1 <1 <1 NA 69 <1 <5 1.07 <1 32.1 106 18 <0.2 190 2.93 <5 GMW-11 12/19/2002 6.9 19.16 NM 1450 NM NM NM NM NM NA 0.009 82 NA NA <2 30.3 NA NA <5 NA 4 0.15 624 <5 190 NA 231 NA NA 806 NA 1270 NA 32 GMW-11 05/28/2003 6.6 15.48 NM 758 NM NM NM NM NM NA 0.009 73 NA NA <2 33.7 NA NA <5 NA 6 0.16 1540 <5 44 NA 264 NA NA 686 NA 1570 NA 9 GMW-11 11/12/2003 NM NM NM 1470 NM NM NM NM NM NA 0.009 31 NA NA <2 29.3 NA NA <5 NA 8 0.2 1370 <5 55 NA 196 NA NA 76.1 NA 1260 NA 10 GMW-11 OS/25/2004 NM NM NM 1230 NM NM NM NM NM NA 0.009 54 NA NA <2 27.1 NA NA 15 NA 6 0.14 2310 <5 29 NA 155 NA NA 544 NA 9711 NA 7 GMW-11 11/17/2004 6.4 26.40 NM 420 NM NM NM NM NM NA <0.005 80 NA NA <2 12.4 NA NA 10 NA 20 0.12 7600 <5 50 NA 21 NA NA 98.4 NA 378 P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-4 Bedrock GW Exceedances Inc Prov BG.xlsx Page 3 of 5 TABLE 4-4 BEDROCK GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter PH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* 10 700 4* 700 2 250 0.07^ 0.07^ 10 1* 1000 2 300 15 50 100 20 NE NE 250 0.2* Soo 0.3* 1000 Provisional Background 6.1-8.3 NE NE NE NE NE NE NE NE NE NE 1421 NE NE NE 125.2 0.116 0.116 11 29.49 NE NE 12035 NE 1677 4.676 NE 38.04 948 105.3 NE 608.8 4.286 NE Sample ID Sample Collection Date Field Parameters Analytical Results GMW-11 05/18/2005 6.6 21.80 NM 699 NM NM NM NM NM NA 0.004 52 NA NA <2 26 NA NA <5 NA 7 0.19 3730 <5 40 NA 67 NA NA 197 NA 551 NA 25 GMW-11 11/16/2005 6.3 22.50 NM 684 NM NM NM NM NM NA <0.005 50 NA NA <2 32.5 NA NA 8 NA 5 0.21 2450 <3 35 NA 60 NA NA 146 NA 530 NA <5 GMW-11 05/22/2006 6.0 24.20 NM 818 NM NM NM NM NM NA <0.003 344 NA NA <2 28.4 NA NA 5 NA 3 0.15 1340 <5 48 NA 43 NA NA 187 NA 484 NA 209 GMW-11 11/15/2006 6.6 24.19 NM 345 NM NM NM NM NM NA <0.003 85 NA NA <2 10.7 NA NA 7 NA 5 0.13 677 <5 54 NA 19 NA NA 72.4 NA 328 NA <10 GMW-11 05/24/2007 6.5 30.40 NM 795 NM NM NM NM NM NA <0.003 320 NA NA <2 42.4 NA NA 7 NA 6 0.136 349 <5 39 NA 41 NA NA 196 NA 550 NA 187 GMW-11 11/06/2007 6.5 30.40 NM 721 NM NM NM NM NM NA <0.003 680 NA NA <2 27.6 NA NA 9 NA 2 0.14 848 <5 59 NA 33 NA NA 146 NA 446 NA 388 GMW-11 05/22/2008 6.5 33.81 NM 770 NM NM NM NM NM NA <0.002 50 NA NA <0.5 17 NA NA <2 NA <0.6 0.14 641 <2 16.3 NA 30.5 NA NA 210 NA 550 NA 1.1 GMW-11 11/19/2008 6.7 35.67 NM 890 NM NM NM NM NM NA <0.0028 84.4 NA NA <0.36 24 NA NA 3.6 NA 12.3 0.16 11200 1 2.6 287 NA 33.9 NA NA 240 NA 640 NA 16.2 GMW-11 05/08/2009 7.7 31.90 NM 810 NM NM NM NM NM NA <0.0028 99.5 NA 2340 0.19 21 NA NA 12.8 NA 6.94 0.25 8520 3.8 139 8.8 13.9 NA NA 170 4 560 NA 15.3 GMW-11 01/05/2010 6.5 29.35 NM 640 NM NM NM NM NM NA <0.0039 56.2 NA 1330 0.3 16 NA NA 2.2 NA <1.9 0.17 2310 2.2 20.1 3.3 14.3 NA NA 150 <3.4 420 NA 5.5 GMW-11 05/26/2010 6.3 24.91 NM 1790 NM NM NM NM NM NA 0.77 64.7 NA 388 <0.08 7.9 NA NA 2.6 NA 7.2 0.1 1200 0.65 29.7 31.8 20.7 NA NA 995 <3 1660 NA 16800 GMW-11 11/16/2010 6.9 19.09 20 1534 NM NM NM 9.3 NM NA 0.58 37 NA 943 <0.08 19.6 NA NA 11.5 NA 1.1 <0.5 205 <0.1 5.3 18.9 25.8 NA NA 755 <10 1300 NA 5.9 GMW-11 04/18/2011 6.8 19.39 21 736 2.89 -30 175 19.6 NM NA <5 59.7 NA 625 <0.08 44.2 NA NA 1.6 B NA 3.7 j,b <0.5 1420 <5 46.7 1.8 5.1 NA NA 103 <0.1 506 NA 4.4 j,b GMW-11 11/01/2011 6.9 21.73 17 713 2.94 -47 158 3.82 NM NA <5 51.9 NA 996 <0.08 37.8 NA NA <5 NA <5 <0.5 393 <5 13.9 <5 21.1 NA NA 120 <0.1 539 NA <10 GMW-11 CUP 11/01/2011 6.9 21.73 17 713 2.94 -47 158 3.82 NM NA 3.13 51.4 NA 1080 <0.08 37.6 NA NA <5 NA <5 <0.5 285 <5 15.7 <5 19 NA NA 122 <0.1 520 NA <10 GMW-11 04/03/2012 6.7 19.27 18 661 3.64 -78 128 4.63 NM NA <5 45.8 NA 615 <0.08 45.4 NA NA 2.2 j,b NA Ij,b <0.5 248 <5 4.4 j,b <5 13.6 NA NA 114 <0.1 510 NA 4.9 j,b GMW-11 11/07/2012 6.5 22.04 15 752 2.53 148 353 6.61 NM NA <5 53.4 NA 1240 0.0513 39.4 NA NA 1.9 j,b NA 2j,b <0.5 454 B <5 9 B <5 20.1 NA NA 171 <0.1 556 NA 11.4 B GMW-11 04/09/2013 6.5 19.87 18 827 2.73 43 248 4.69 NM NA <1 51 NA 514 <1 40 NA NA <5 NA <5 0.24 150 <1 <5 <5 19.9 NA NA 130 <0.2 540 NA <5 GMW-11 11/12/2013 6.6 20.73 15 854 2.1 285 490 5 NM NA <1 52 NA 1690 <1 34 NA NA <5 NA <5 0.2 234 <1 <5 <5 34.2 NA NA 180 <0.2 600 NA <5 GMW-11 04/03/2014 6.6 18.72 15 860 3.3 290 495 3.9 NM NA <1 46 NA 919 <1 35 NA NA <5 NA <5 0.16 31 <1 <5 <5 20.4 NA NA 180 <0.2 580 NA <5 GMW-11 CUP 04/03/2014 6.6 18.72 15 860 3.3 290 495 3.9 NM NA <1 44 NA 1050 <1 35 NA NA <5 NA <5 0.16 21 <1 <5 <5 21.8 NA NA 180 <0.2 570 NA <5 GMW-11 11/11/2014 6.6 20.02 15 829 1.78 291 496 2.41 NM NA <1 43 NA 1310 <1 32 NA NA <5 NA <5 0.2 22 B <1 <5 6 28.5 NA NA 210 <0.2 590 NA <5 GMW-11 04/20/2015 6.6 16.48 17 866 2.9 17 222 4.37 NM NA <1 56 NA 708 <1 32 NA NA <5 NA <5 0.17 145 <1 <5 <5 20.9 NA NA 200 <0.2 580 NA <5 GMW-11 07/01/2015 6.6 18.27 17 849 2.7 304 509 8.5 NM NA NA NA NA NA NA NA NA 0.296 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA GMW-11 09/14/2015 6.6 20.59 17 846 2.7 94 299 0.42 0 <1 <1 45 <1 1590 <1 34 NA NA <1 <1 <1 NA <10 <1 <5 2.43 49 44.9 353 220 <0.2 610 7.04 <5 GMW-11 11/04/2015 6.5 19.67 18 867 1.72 112 317 2.75 NM NA 0.15j 45.9 NA 1590 <0.101 33.4 B2 NA NA <0.5 NA <1 0.312j 34.2 <0.065 1.27j 3.12j 53.3 NA NA 218 <0.133 607 NA 6.42 GMW-11 04/06/2016 6.6 15.11 15 852 1.89 216 421 2.34 NM NA <1 49.2 NA 1390 <1 33 NA NA <5 NA <5 0.318j 86.6 <1 1.9j 3.61j 41.2 NA NA 230 <0.2 611 NA <5 MW-1 BR 07/10/2015 6.7 29.91 20 858 1.5 4 209 5.39 NM <1 <1 628 <1 592 <1 33 NA NA 2.09 4.19 <1 NA 405 <1 2500 5.22 1.3 52.4 495 40 <0.2 550 9.65 86 MW-1 BR 09/15/2015 6.6 31.50 20 854 2 46 251 7.81 0 <1 <1 546 <1 501 <1 37 NA NA 1.65 3.55 <1 NA 447 <1 2190 9.67 1.11 47.9 483 43 <0.2 510 8.57 82 MW-1 BR 12/04/2015 6.8 30.80 8 700 2.11 77 282 3.45 0 <1 <1 548 <1 346 <1 33 <0.03 NA 1.46 4.7 <1 NA 280 <1 2840 13.7 <1 38.4 457 39 <0.2 440 2.95 13 MW-1BR 01/06/2016 6.8 28.71 5 837 1.4 66 271 2.8 0 <1 <1 543 <1 589 <1 40 <0.03 NA <1 3.37 <1 NA 234 <1 1820 9.72 1.03 54 487 47 <0.2 580 8.41 6 MW-2BR 03/27/2015 6.4 12.07 11 933 2.2 -20 185 7.05 2 <1 1.29 974 <1 <50 <1 120 NA NA <1 4.22 <1 NA 3300 <1 888 1.42 <1 48.3 674 39 <0.2 570 1.27 7 MW-2BR 06/25/2015 6.6 15.60 27 984 1.5 298 503 3.12 NM NA NA NA NA NA NA NA NA <0.003 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-2BR 09/14/2015 6.6 18.29 20 889 0.4 -14 191 4.11 1.5 <1 1.53 1260 <1 <50 <1 120 NA NA <1 3.33 <1 NA 3390 <1 1200 1.27 <1 43.5 612 32 <0.2 550 0.514 10 MW-2BR 12/04/2015 6.4 15.30 15 939 0.27 -1 204 1.88 4.5 <1 2.63 1610 <1 <50 <1 120 <0.03 NA <1 4.15 <1 NA 15600 <1 1870 1.41 <1 24.1 656 22 <0.2 500 0.365 9 MW-2BR 01/06/2016 6.2 12.13 13 841 0.49 31 236 2.91 5 <1 2.32 1180 <1 <50 <1 120 <0.03 NA <1 5.27 <1 NA 16000 <1 967 1.47 <1 45 556 32 <0.2 500 0.357 <5 MW-3BR 05/29/2015 6.6 25.44 21 2424 0.7 31 236 3.5 0 <1 <1 49 <1 2310 <1 71 NA NA <1 4.08 7.06 NA 148 <1 189 1.75 6.02 47.7 1370 1200 <0.2 2100 18.8 <5 MW-3BR DUP 05/29/2015 6.6 25.44 21 2424 0.7 31 236 3.5 0 <1 <1 48 <1 2270 <1 71 NA NA <1 3.55 7.31 NA 146 <1 172 1 1.61 6.21 1 46.9 1340 1200 <0.2 2200 11.5 <5 MW-3BR 06/30/2015 6.8 25.00 20 2498 2.49 5 210 8.96 NM NA NA NA NA NA NA NA NA 0.769 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-3BR 09/16/2015 6.7 27.33 18 2441 0.9 92 297 7.77 0 <1 <1 43 <1 2550 <1 76 NA NA <1 2.51 14.9 NA 308 <1 49 1.23 7.13 47.4 1410 1300 <0.2 2400 15.7 <5 MW-3BR 12/04/2015 6.6 23.04 13 2460 0.53 93 298 2.84 0 <1 <1 35 <1 2700 <1 77 0.4 NA <1 1.32 13.9 NA 55 <1 26 1.06 7 54.6 1320 1 1300 <0.2 2300 15 <5 MW-3BR 01/06/2016 6.8 1 22.42 1 1 2659 0.9 7 212 3 0 <1 <1 41 <1 2680 <1 76 0.26 NA <1 2.44 11.2 NA 140 <1 44 1.19 5.03 56.3 1470 1400 <0.2 2300 14 <5 MW-4BR 05/31/2015 9.7 46.39 22 352 6 -226 -21 10 0 2.74 1.57 50 <1 <50 <1 19 NA NA 17.1 <1 <1 NA 204 <1 6 <1 1.67 34.1 170 44 <0.2 220 8.16 303 MW-4BR 06/29/2015 9.2 46.02 21 326 2.5 281 486 13 NM NA NA NA NA NA NA NA NA 11.8 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-4BR 09/15/2015 8.8 46.93 21 343 0.9 -24 181 7.96 0 2.85 1.58 37 <1 <50 <1 20 NA NA 7.45 <1 <1 NA 96 <1 6 <1 1.12 36 174 47 <0.2 200 4.91 36 MW-4BR 12/04/2015 8.9 46.54 12 327 0.86 -29 176 4.46 0 1.87 1.65 1 35 <1 <50 <1 20 1.9 NA 3.74 <1 <1 NA 86 <1 9 <1 <1 35.9 189 44 <0.2 180 3.59 8 MW-4BR 01/05/2016 8.2 46.15 3 355 0.8 1 206 8.94 0 1.1 1.15 44 <1 <50 <1 19 0.43 NA 1.75 <1 I <1 NA 78 <1 17 <1 <1 35 246 39 <0.2 220 1.85 8 MW-4BRL 06/22/2016 7.4 166.28 19 436 2.88 -22 183 7.91 0 <1 <1 72 <1 <50 <1 16 0.059 NA 1.85 4.76 1.55 NA 187 <1 659 2.95 <1 35.5 200 26 <0.2 310 2.41 8 MW-5BR 05/27/2015 NM NM NM NM NM NM NM NM NM <1 <1 16 <1 <50 <1 14 NA NA <1 4.15 1.71 NA 19 <1 62 <1 <1 14.8 269 110 <0.2 1200 2.14 <5 MW-5BR 06/25/2015 7.6 27.90 22 590 3.4 167 276 3.19 NM NA NA NA NA NA NA NA NA 0.273 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-5BR 09/13/2015 7.0 29.99 18 625 0.9 102 307 1.62 0 <1 <1 17 <1 <50 <1 14 NA NA <1 3.62 <1 NA 66 <1 61 <1 <1 15.8 294 150 0.261 430 1.47 <5 MW-5BR 12/04/2015 7.6 27.55 13 598 1.7 45 250 4.1 0 <1 <1 16 <1 <50 <1 14 0.072 NA <1 2.62 1.16 NA 20 <1 67 <1 <1 14.9 278 140 <0.2 380 1.7 <5 MW-5BR 01/05/2016 7.9 26.91 5 664 0.6 -130 76 2.1 0.5 <1 <1 18 <1 <50 <1 14 <0.03 NA <1 4.42 <1 NA 594 <1 196 <1 <1 16.1 290 160 <0.2 470 <0.3 <5 MW-6BR 05/29/2015 8.0 7.49 18 370 0.1 -205 -289 6 NM <1 <1 9 <1 <50 <1 7.8 NA NA <1 <1 <1 NA 302 <1 68 <1 <1 12.6 145 9.3 <0.2 1 210 0.44 <5 MW-6BR 06/25/2015 8.0 7.42 21 379 0.4 -270 -65 2.85 NM NA NA NA NA NA NA NA NA 0.01 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-6BR 09/13/2015 7.9 8.78 20 410 0.3 -198 7 2.9 0 <1 <1 12 <1 <50 <1 7.6 NA NA <1 <1 1.04 NA 555 <.1 70 <1 <1 12.5 169 4.6 <0.2 220 0.544 <5 MW-6BR CUP 09/13/2015 7.9 8.78 20 410 0.3 -198 7 2.9 0 <1 <1 12 <1 <50 <1 8 NA NA <1 <1 1.73 NA 619 <1 71 <1 <1 12.5 166 5.1 <0.2 230 0.927 <5 MW-7BR 05/31/2015 7.1 13.75 21 438 2.9 111 316 3.13 0 <1 <1 10 <1 <50 <1 12 NA NA <1 <1 4.62 NA 260 <1 364 2.72 <1 14.2 142 17 0.216 280 1.21 8 MW-7BR 09/12/2015 7.1 15.51 22 398 2 145 350 1.19 0 <1 <1 21 <1 <50 <1 7.5 NA NA <1 <1 2.87 NA 81 <1 229 <1 <1 19.4 140 22 <0.2 260 5.9 9 MW-8BR 06/08/2015 7.4 40.50 20 593 5.2 155 360 3.91 NM <1 <1 36 <1 <50 <1 25 NA NA 2.58 <1 1.79 NA 480 <1 433 <1 <1 24.2 220 29 <0.2 370 2.1 30 MW-8BR 09/15/2015 8.6 41.12 20 546 0.8 65 270 4.49 0 <1 <1 36 <1 <50 <1 26 NA NA 3.29 <1 4 NA 145 <1 557 <1 <1 24.4 202 28 <0.2 340 2.32 28 MEEK OS/31/2015 6.6 32.56 19 376 2.6 97 302 5.34 0 <1 <1 53 <I <50 <1 15 NA NA <1 2.41 2.93 NA 154 <I 331 1.34 <1 20.9 208 24 <0.2 240 4.34 90 P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-4 Bedrock GW Exceedances Inc Prov BG.xlsx Page 4 of 5 TABLE 4-4 BEDROCK GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Analytical Parameter pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Barium Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Fluoride Iron Lead Manganese Nickel Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs mg/I ug/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I ug/I ug/I ug/I ug/I mg/I ug/I mg/I ug/I mg/I ug/I ug/I 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE 1* SO 700 4* 700 2 250 0.07^ 0.07^ SO 1* 1000 2 300 15 50 100 20 NE NE 250 0.2* Soo 0.3* 1000 Provisional Background 6.1-8.3 NE NE NE NE NE NE NE NE NE NE 1421 NE NE NE 125.2 0.116 0.116 11 29.49 NE NE 12035 NE 1677 4.676 NE 38.04 948 105.3 NE 608.8 4.286 NE Sample ID Sample Collection Date Field Parameters Analytical Results MW-9BR 06/30/2015 6.9 33.08 19 371 1.43 -2 203 4.86 NM NA NA NA NA NA NA NA NA <0.021 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-9BR 09/15/2015 8.1 35.92 19 352 0.5 51 256 9.46 0 <1 <1 33 <1 <50 <1 13 NA NA <1 1.67 1.03 NA 424 <1 257 <1 <1 21.2 163 22 <0.2 210 2.06 18 MW-9BR 12/06/2015 6.8 32.77 16 341 0.24 24 229 3.93 0 <0.5 <0.5 25 <0.2 <50 <0.08 11.5 <0.03 NA <0.5 1.5 <1 NA 250 <0.1 220 0.73 <0.5 22.6 170 21.1 <0.1 154 1.3 <10 MW-9BR 01/07/2016 6.5 30.57 13 305 0.26 80 285 5.97 0 <1 <1 26 <1 <50 <1 11 <0.03 NA <1 1.97 <1 NA 275 <1 250 <1 <1 18.3 178 22 <0.2 210 1.27 25 MW-9BR DUP 01/07/2016 6.5 30.57 13 305 0.26 80 285 5.97 0 <1 <1 26 <1 <50 <1 11 <0.03 NA <1 1.96 <1 NA 283 <1 249 <1 <1 18 177 22 <0.2 220 1.3 24 MW-11BR 03/26/2015 6.9 3.17 13 420 1.8 155 360 1.29 0 <1 <1 118 <1 <50 <1 7.2 NA NA <1 <1 1.64 NA 163 <1 308 <1 <1 12.6 129 35 <0.2 180 2.01 <5 MW-11BR 06/24/2015 7.0 1 4.89 1 29 425 0.8 -191 1 14 1.28 1 NM NA NA I NA NA NA NA NA NA 0.01 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-11BR 09/14/2015 7.0 7.67 24 420 0.3 -75 130 0.57 NM <1 <1 101 <1 <50 <1 5.9 NA NA <1 <1 <1 NA 553 <1 311 <1 <1 12.1 116 37 <0.2 270 0.546 <5 MW-12BR 05/29/2015 7.2 3.50 17 643 0.2 -226 -21 2 1.5 <1 <1 39 <1 <50 <1 38 NA NA <1 1.79 <1 NA 1740 <1 893 <1 <1 18.9 222 31 <0.2 390 0.394 <5 MW-12BR 06/24/2015 7.2 3.73 19 638 0.54 273 478 0.97 NM NA NA NA NA NA NA NA NA 0.004 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-12BR 09/14/2015 7.2 5.02 17 640 0.2 -135 70 1.3 1.5 <1 <1 40 <1 <50 <1 38 NA NA <1 1.38 <1 NA 3300 <1 1050 <1 <1 18.4 223 28 0.762 420 0.424 <5 MW-19BRL 06/16/2016 7.5 37.58 18 616 0.18 -140 65 6.34 NM <1 1.39 79 <1 <50 <1 59 <0.03 NA <1 2.03 <1 NA 2890 <1 1180 <1 <1 36.7 189 7.7 <0.2 380 0.602 <5 MW-20BRL 03/15/2016 7.5 0.00 17 319 0.5 -73 132 0.27 NM <1 <1 <5 <1 <50 <1 6.3 <0.03 NA <1 <1 <1 NA 352 <1 295 <1 <1 13.8 155 7.5 <0.2 210 <0.3 <5 MW-20BRL 06/17/2016 7.3 0.00 16 287 0.22 -85 120 0.4 NM <1 <1 <5 <1 <50 <1 5.5 <0.03 NA <1 <1 <1 NA 88 <1 289 <1 <1 13.7 156 7.7 <0.2 220 <0.3 B2 <5 MW-22BR 06/20/2016 7.1 16.84 20 1101 1.64 33 238 7.88 0 <1 <1 89 <1 452 <1 23 0.088 NA <1 6.14 3.61 NA 277 <1 1420 2.72 2.58 46.9 539 350 <0.2 870 2.08 B2 <5 MW-23BR 06/17/2016 7.5 47.63 17 414 0.22 -64 141 4.98 NM 1.36 <1 66 <1 <50 <1 34 <0.03 NA 4.26 <1 <1 NA 429 <1 380 2.7 <1 19 413 5 <0.2 290 0.865 B2 <5 MW-24BR 06/16/2016 7.6 41.15 17 474 0.26 -98 107 9.05 NM <1 <1 68 <1 <50 <1 21 <0.03 NA <1 <1 <1 NA 52 <1 48 <1 <1 29.7 1890 87 <0.2 320 0.727 <5 MW-25BR 06/16/2016 6.9 50.57 17 854 0.35 -47 158 6.64 NM <1 <1 52 <1 <50 <1 63 <0.03 NA 15.8 <1 1.08 NA 612 <1 544 9.57 <1 28.7 1840 98 <0.2 610 0.803 <5 MW-26BR 06/17/2016 7.1 37.74 17 724 0.48 18 223 7.72 NM <1 <1 70 <1 <50 <1 35 <0.03 NA <1 <1 1.86 NA 424 <1 594 1.28 <1 25.5 279 74 <0.2 550 1.44 B2 <5 NCDEQ Sampled Water Supply Wells RO-1(Duke) 03/16/2015 NM NM NM NM NM NM NM NM NM <1 <1 <5 <1 <50 <1 38 NA NA <5 <1 <5 NA <10 <1 10 <5 1.57 23.4 432 48 <0.2 390 3.47 16 RO-1(Vendor) 03/16/2015 6.9 NM 16 505 4.01 NM NM <1 NM <3 <10 3.62 <1 <100 <1 39.4 <20 NA <10 <5 <10 NA <50 1.73 8.29 <10 2.39 22.9 390 51 <1 405 2.84 14.7 RO-2(Duke) 05/04/2015 NM NM NM NM NM NM NM NM NM <1 <1 71 <1 <50 <1 22 NA NA <5 <1 42 NA 17 1.79 <5 <5 <1 37.3 205 72 <0.2 380 1.76 94 RO-2(Vendor) 05/04/2015 6.6 NM 17 640 NM NM NM <1 NM <5 <5 64.4 <2 <50 <0.8 24 0.11 NA <5 <5 39.1 NA <500 1.8 <5 <5 <5 <0.5 <5 <8 <1 383 <10 87.4 RO-3(Duke) 03/12/2015 NM NM NM NM NM NM NM NM NM <1 <1 70 <1 <50 <1 44 NA NA <5 <1 5 NA <10 <1 <5 <5 <1 33.3 190 74 <0.2 400 2.69 17 RO-3(Vendor) 03/12/2015 6.3 NM 15 542 5.4 NM NM <0.4 NM <1 <1 65 <1 <500 <1 47 <10 NA <1 <1 6.1 NA <50 <1 <5 <2 <1 34 180 71 <1 410 <5 16 RO-4(Duke) 02/19/2015 NM NM NM NM NM NM NM NM NM <1 <1 60 <1 <50 <1 15 NA NA <5 <1 <5 NA 215 <1 152 <5 <1 15.2 250 8.1 <0.2 250 0.88 17 RO-4 (Vendor) 02/19/2015 6.8 NM 13 400 4.72 NM NM <1 NM <0.5 <2 66.1 <0.5 <50 <0.15 17 <5 NA 2.69 <1 2.27 NA 228 <0.5 144 1.35 <2 16.4 260 7 <0.5 267 1.38 19.6 RO-7(Duke) 08/17/2015 NM NM NM NM NM NM NM NM NM <1 <1 69 <1 <50 <1 18 NA NA <5 <1 10 NA 24 <1 28 <5 <1 15.6 259 6.5 <0.2 200 6.03 44 RO-7 (Vendor) 08/17/2015 6.2 NM 22 261 4.12 NM NM <1 NM <0.5 <0.5 67.8 <0.2 <5 <0.08 19.4 0.57 NA 6.2 <0.5 10.1 NA 53.8 0.25 29.4 1.9 <0.5 16.3 268 7.1 <0.1 200 5.9 40.7 RO-8 (Duke) 04/27/2015 NM NM NM NM NM NM NM NM NM <1 <1 55 <1 <50 <1 40 NA NA <5 <1 21 NA 24 14 <5 <5 <1 19.3 251 27 <0.2 360 4.78 43 RO-8 (Vendor) 04/27/2015 6.7 NM 13 594 2.2 NM NM <1 NM <0.5 <0.5 51 <0.2 <5 <0.08 44.2 0.19 NA <0.5 <0.5 25.4 NA <50 40.3 1.9 <0.5 <0.5 18.4 255 29.2 <0.1 366 4.5 40.9 RO-10-1(Duke) 05/04/2015 NM NM NM NM NM NM NM NM NM <1 <1 330 <1 <50 <1 320 NA NA <5 3.74 5 NA 142 <1 982 <5 <1 62.9 1020 17 <0.2 1000 3.26 13 RO-10-1(Vendor) 05/04/2015 6.5 NM 22 184 3.8 NM NM 1.5 NM <5 <5 300 <2 <50 <0.8 335 0.062 NA <5 <5 <10 NA <500 <1 <5 <5 <5 59.8 936 <2 <1 999 <10 <50 RO-10-2(Duke) 05/04/2015 NM NM NM NM NM NM NM NM NM <1 <1 128 <1 <50 <1 29 NA NA <5 <1 5 NA 1260 1.72 369 <5 <1 26.9 277 25 <0.2 360 3.87 15 RO-10-2(Vendor) 05/04/2015 6.7 NM 19 631 0.61 NM NM 6.2 NM <5 <5 <3 <2 <50 <0.8 30.3 <0.03 NA <5 15 <10 NA <500 1.7 <5 <5 <5 <0.5 <5 27 <1 369 <10 <50 RO-11(Duke) 08/17/2015 NM NM NM NM NM NM NM NM NM <1 <1 127 <1 <50 <1 29 NA NA <5 <1 20 NA 26 2.08 <5 <5 <1 27.2 231 29 <0.2 340 10.2 40 RO-11 (Vendor) 08/17/2015 6.4 NM 23 470 3.42 NM NM <1 NM <0.5 <0.5 125 <0.2 <5 <0.08 31.2 1.2 NA 1.7 <0.5 19.5 NA <50 2.3 1.5 0.56 <0.5 25.3 236 31.1 <0.1 326 10.6 36.3 RO-12(Duke) 08/17/2015 NM NM NM NM NM NM NM NM NM <1 <1 69 <1 <50 <1 24 NA NA <5 <1 <5 NA 1140 <1 531 <5 <1 40 325 73 <0.2 470 0.455 12 RO-12 (Vendor) 08/17/2015 6.8 NM 21 662 0.89 NM NM 8.9 NM <0.5 <0.5 67.1 <0.2 6.1 <0.08 26.7 <0.03 NA <0.5 <0.5 1.3 NA 1100 0.24 494 <0.5 <0.5 36.5 326 71.8 <0.1 463 <1 12.2 RO-13 (Duke) 08/17/2015 NM NM NM NM NM NM NM NM NM <3 <1 33 <1 <50 <1 8.2 NA NA <5 <1 91 NA <10 1.2 <5 <5 <1 10.5 165 1.5 <0.2 130 3.06 54 RO-13 (Vendor) 08/17/2015 6.0 NM 23 145 5.07 NM NM <1 NM <0.5 <0.5 30.9 <0.2 <5 <0.08 8.4 0.92 NA 1.3 <0.5 93.2 NA <50 1.3 3.7 <0.5 <0.5 9.99 166 2.6 <0.1 138 3.1 51.1 RO-14(Duke) 08/18/2015 NM NM NM NM NM NM NM NM NM <1 <1 53 <1 <50 <1 29 NA NA <5 <1 5 NA 887 <1 6 <5 1.15 16.7 249 51 <0.2 390 6.02 31 RO-14 (Vendor) 08/18/2015 7.1 NM 24 647 0.95 NM NM 7.4 NM <0.5 <0.5 48.6 <0.2 <5 <0.08 31 <0.03 NA <0.5 <0.5 7.6 NA 827 0.76 5.9 <0.5 1.1 16.5 244 52.3 <0.1 382 5.6 29.9 RO-15(Duke) 10/22/2015 NM NM NM NM NM NM NM NM NM <1 <3 60 <S 1 <50 <S 39 NA NA <5 <1 13 NA 17 <1 <5 <5 <1 61.7 188 46 <0.2 460 14.9 240 RO-15 (Vendor) 10/22/2015 7.0 NM 18 799 2.14 NM NM <1 NM <0.5 <0.5 59 <0.2 <5 <0.08 44.5 0.83 NA 1.3 <0.5 13.4 NA <50 0.64 0.62 0.61 <0.5 64.7 190 47.1 <0.1 456 16.1 <5 RO-16 (Duke) 10/22/2015 NM NM NM NM NM NM NM NM NM <1 <1 19 <1 <50 <1 7.2 NA NA <5 <1 1 8 NA <10 <1 <5 <5 <1 15.5 124 19 <0.2 170 5.13 29 RO-16 (Vendor) 10/22/2015 6.1 NM 17 188 2.4 NM NM I <S I NM 1 <0.5 <0.5 18.7 <0.2 <5 <0.08 7.8 1.2 NA 1 1.4 <0.5 1 7.8 NA <50 0.56 0.98 1.4 <0.5 <0.05 i 121 <2 <0.1 <25 5.5 <5 Prepared by: BER Checked by: CDE Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 Spec Cord = Specific Conductance Deg C = Degrees Celsius NTU = Nephelometric turbidity unit Temp = Temperature DUP = Duplicate umhos/cm = Micro mhos per centimeter NE = Not established 1 = Estimated concentration aboe the adjusted method detection limit and below the adjusted reporting limit. S.U. = Standard Unit mg/I = Milligram per liter DO = Dissolved oxygen B = Target analyte detected in method blank at or above the reporting limit. ft = Feet mV = Millivolts ORP = Oxidation -Reduction Potential NA = Not analyzed ug/I = Microgram per liter Eh = Oxidation Potential NM = Not measured = NC DHHS Health Screening Level < = 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. b = Target analyte detected in method blank at or above the reporting limit. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. M1 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable. M4 = The spike recovery valuable was unusable since the analyte concentration in the sample was disproportionate to the spike level. j = Indicates concentration reported below Practice Quantitation Limit (PQL), but above Method Detection Limit (MDQ and therefore concentration is estimated. Data not used in provisional background concentration determinations. P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\39.EG_CSASUP\Tables\Table 4-4 Bedrock GW Exceedances Inc Prov BG.xlsx Page 5 of 5 TABLE 4-5 TRANSITION ZONE BACKGROUND GROUNDWATER UPPER PREDICTION LIMITS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Constituent Reporting Units Number of Samples Number of Detected Samples Minimum Detected Concentration Maximum Detected Concentration Mean Statistical Method UPL (1 Future Sample) UPL (15 Future Samples) UPL (24 Future Samples) Antimony ug/L 28 3 0.64 2.53 1.63 95% WH Approx. Gamma UPL 0.697 2.098 2.41 Barium ug/L 28 28 5 97 66.96 95% UPL (np) 96.1 96.1 96.1 Boron ug/L 28 0 --- --- --- --- --- --- --- Chromium (hexavalent) ug/L 7 7 0.78 10.2 4.34 95% WH Approx. Gamma UPL 14.45 39.97 47.37 Chromium ug/L 28 25 1.26 73 12.46 95% WH Approx. Gamma UPL 40.25 93.71 104.8 Cobalt ug/L 15 7 0.56 4.01 1.71 95% WH Approx. Gamma UPL 4.103 11.85 13.69 Iron ug/L 28 28 51 1,760 457.2 95% WH Approx. Gamma UPL 1,143 2,080 2,260 Manganese ug/L 28 27 5 978 104.9 95% WH Approx. Gamma UPL 360.2 955.8 1,084 Selenium ug/L 28 it 1.01 15.9 3.109 95% WH Approx. Gamma UPL 6.004 17.52 20.07 Sodium mg/L 15 15 21.9 59.7 32.9 95% UPL (np) 59.7 59.7 59.7 Strontium ug/L 13 13 231 1,270 497.8 95% WH Approx. Gamma UPL 1,075 1,895 2,067 Sulfate mg/L 28 28 11 130 26.09 95% UPL (np) 98.95 98.95 98.95 Thallium ug/L 28 1 --- 0.23 --- - --- --- --- Total Dissolved Solids mg/L 28 28 248 650 371 95% UPL (np) 632 632 632 Vanadium u /L 14 14 1.1 24.4 10.9 95% WH Approx. Gamma UPL 33.1 71.87 80.46 Prepared by: MCD Checked by: HHS Notes: UPL = Upper Prediction Limit np = Non -parametric Gamma = Gamma data transformation Lognormal = Lognormal data transformation WH = Wilson Hilferty ug/L = micrograms per liter mg/L = milligrams per liter --- = Calculations were not performed due to lack of samples. P:\Duke Energy Progress. 1026\107. Roxboro Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-5 Transition Zone BG GW Upper Pred Limits Page 1 of 1 TABLE 4-6 BEDROCK BACKGROUND GROUNDWATER UPPER PREDICTION LIMITS ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Constituent Reporting Units Number of Samples Number of Detected Samples Minimum Detected Concentration Maximum Detected Concentration Mean Statistical Method UPL (1 Future Sample) UPL (21 Future Samples) UPL (45 Future Samples) Antimony ug/L 35 0 --- --- --- --- --- --- Arsenic ug/L 35 4 0.59 1.3 1.003 95% WH Approx. Gamma UPL 0.996 2.747 3.292 Barium ug/L 35 35 15 380 99.69 95% UPL (t) (lognormal) 314.1 1086 1421 Beryllium ug/L 35 0 --- --- --- --- --- --- --- Boron ug/L 35 0 --- --- --- - --- --- --- Chloride mg/L 35 35 11.7 130 42.58 95% UPL (np) 125.2 125.2 125.2 Chromium (hexavalent) ug/L 22 3 0.035 0.099 0.0693 95% WH Approx. Gamma UPL 0.0478 0.1 0.116 Chromium ug/L 35 12 0.71 4.24 1.875 95% WH Approx. Gamma UPL 3.273 9.162 11 Cobalt ug/L 35 18 0.94 8.2 3.683 95% WH Approx. Gamma UPL 8.379 24.41 29.49 Iron ug/L 35 35 33 6,080 1,173 95% WH Approx. Gamma UPL 4,052 10,182 12,035 Manganese ug/L 35 35 10 1300 506.7 95% UPL (t) (normal) 1,105 1,575 1,677 Nickel ug/L 35 23 0.61 2.72 1.468 95% WH Approx. Gamma UPL 2.52 4.226 4.676 Selenium ug/L 35 0 --- --- --- - --- --- --- Sodium mg/L 35 35 17.9 39.8 27.44 95% UPL (np) 38.04 38.04 38.04 Strontium ug/L 35 35 72 960 291.2 95% UPL (np) 948 948 948 Sulfate mg/L 35 35 1.5 42 24.63 95% WH Approx. Gamma UPL 54.28 94.51 105.3 Thallium ug/L 35 0 -- --- --- --- --- --- --- Total Dissolved Solids mg/L 35 35 231 540 359.2 95% WH Approx. Gamma UPL 473.7 583.1 608.8 Vanadium ug/L 35 24 0.347 3.08 1.203 95% KM Chebyshev UPL 4.286 4.286 4.286 Zinc I ug/L 1 35 17 1 5 1 101 1 30.18 1 95% WH Approx. Gamma UPL 66.27 1 218.3 1 268.2 Prepared by: MCD Checked by: HHS Notes: UPL = Upper Prediction Limit NP = Non -parametric Gamma = Gamma data transformation Lognormal = Lognormal data transformation WH = Wilson Hilferty KM = Kaplan Meier ug/L = micrograms per liter mg/L = milligrams per liter --- = Calculations were not performed due to lack of samples. P: Duke Energy Progress.1026 107. Roxboro Ash Basin GW Assessment Plan 19.EG_CSASUP Tables Table 4-6 Bedrock BG GW Upper Pred Limits Page 1 of 1