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Home My WebLink AboutNC0004774_2_FINAL_CSA Supplement 2_Buck_Tables_20160802Table 1-1: Well Construction Information Monitoring Well ID AB-10D Monitoring Well Type Deep Northing 714615.48 Easting 1591972.12 TOC Elevation Stick-up . 712.78 Casing 2.73 Casing Type PVC Casing Diameter 6.0 Top. Screen 103.73 Bottom Screen 108.73 Depth 594.05 Program CAMA AB-10S Shallow 714649.06 1591973.43 712.48 2.78 PVC 2.0 22.78 37.78 673.70 CAMA AB-1D Deep 714852.21 1592699.33 708.45 2.73 PVC 6.0 74.73 79.73 615.72 CAMA AB-2BR Bedrock 714301.36 1592696.90 708.05 2.99 PVC 6.0 113.99 118.99 569.16 CAMA AB-2D Deep 714309.02 1592706.05 707.97 2.92 PVC 2.0 76.92 81.92 619.35 CAMA AB-2S Shallow 714294.11 1592696.14 708.03 2.99 PVC 2.0 7.19 17.19 690.54 CAMA AB-2SL Shallow 714281.70 1592705.96 708.06 3.02 PVC 2.0 29.02 39.02 668.04 CAMA AB-31) Deep 713519.60 1592641.46 707.05 2.80 PVC 6.0 80.80 85.80 615.25 CAMA AB-3S Shallow 713508.30 1592627.51 706.93 2.76 PVC 2.0 6.76 21.76 684.17 CAMA AB-4BR Bedrock 715418.89 1594354.03 686.90 2.08 PVC 6.0 115.08 120.08 557.62 CAMA AB-4BRU Deep 715397.40 1594336.31 687.48 2.99 PVC 6.0 80.49 85.49 593.99 CAMA AB-4S Shallow 715404.23 1594326.95 688.03 3.06 PVC 2.0 6.06 21.06 665.97 CAMA AB-4SL Shallow 715402.64 1594350.51 687.34 2.74 PVC 2.0 40.74 50.74 635.60 CAMA AB-5BRU Deep 715832.87 1594549.99 686.92 2.81 PVC 6.0 110.11 115.11 569.61 CAMA AB-5S Shallow 715816.90 1594550.86 687.05 2.90 PVC 2.0 6.90 21.90 664.15 CAMA AB-5SL Shallow 715815.48 1594558.39 687.19 3.04 PVC 2.0 47.04 57.04 629.15 CAMA AB-6BRU Deep 716328.14 1594543.00 688.15 3.12 PVC 6.0 141.12 146.12 534.53 CAMA AB-7BRU Deep 716321.02 1595051.02 683.74 3.00 PVC 6.0 137.00 142.00 539.04 CAMA AB-7S Shallow 716322.62 1595044.87 683.60 3.05 PVC 2.0 7.05 22.05 660.55 CAMA AB-7SL AB-8D AB-8S Shallow Deep Shallow 716319.15 715777.87 715778.93 1595062.77 1595106.86 1595119.16 683.30 677.40 677.92 2.94 2.31 2.43 PVC PVC PVC 2.0 6.0 2.0 42.14 132.31 6.43 52.14 137.31 21.43 629.36 539.69 655.49 CAMA CAMA CAMA AB-9BR Bedrock 716645.29 1595003.74 692.31 3.02 PVC 6.0 188.02 193.02 492.79 CAMA AB-9BRU Deep 716653.38 1594986.54 692.43 3.22 PVC 6.0 153.22 158.22 529.21 CAMA AB-9S Shallow 716647.42 1594995.49 691.94 2.49 PVC 2.0 27.49 42.49 648.45 CAMA AS-11) AS-1S AS-21) Deep Shallow Deep 714812.58 714849.52 714451.53 1593174.51 1593167.39 1593500.89 743.62 743.23 738.40 3.01 2.98 3.05 PVC PVC PVC 6.0 2.0 6.0 123.01 43.98 87.05 128.01 58.98 92.05 609.21 683.25 639.85 CAMA CAMA CAMA AS-31) Deep 713786.65 1593495.26 730.95 3.13 PVC 6.0 98.93 103.93 602.22 CAMA AS-3S Shallow 713792.59 1593507.67 731.60 3.04 PVC 2.0 28.04 43.04 687.56 CAMA BG-1BR Bedrock 711034.04 1590749.84 725.84 2.92 PVC 6.0 138.92 143.92 577.02 CAMA BG-11) Deep 711048.75 1590751.64 725.94 2.90 PVC 6.0 101.90 106.90 611.84 CAMA BG-1S Shallow 711041.81 1590746.46 725.30 2.71 PVC 2.0 17.71 32.71 691.59 CAMA BG-21) Deep 710818.44 1591074.34 729.95 2.64 PVC 6.0 101.64 106.64 616.31 CAMA BG-2S Shallow 710828.57 1591076.66 729.66 2.39 PVC 2.0 19.49 34.49 694.27 CAMA BG-3BRU Deep 712989.05 1594498.82 722.43 2.94 PVC 6.0 72.94 77.94 638.49 CAMA BG-3S Shallow 712989.92 1594510.29 722.49 3.05 PVC 2.0 28.35 43.35 677.94 CAMA GWA-10D Deep 714013.72 1591544.41 664.28 3.20 PVC 6.0 42.00 47.00 608.58 CAMA GWA-10S Shallow 713998.38 1591519.23 663.76 2.84 PVC 2.0 7.24 22.24 640.72 CAMA GWA-11D Deep 713260.44 1591603.56 701.90 3.06 PVC 6.0 84.06 89.06 605.24 CAMA GWA-11S Shallow 713271.74 1591600.97 701.11 2.79 PVC 2.0 22.69 37.69 661.92 CAMA GWA-12BRU Deep 717242.79 1593221.80 649.64 2.97 PVC 6.0 68.37 73.37 575.27 CAMA GWA-12S Shallow 717234.44 1593227.41 650.43 3.10 PVC 2.0 13.10 28.10 621.33 CAMA GWA-13D Deep 713302.29 1594782.84 718.50 3.33 PVC 6.0 63.33 68.33 73.33 CAMA GWA-13SR Shallow 713302.13 1594794.71 718.58 3.32 PVC 2.0 28.32 43.32 43.52 CAMA GWA-14BR Bedrock 713719.58 1595144.87 693.11 3.24 PVC 6.0 86.24 91.24 108.24 CAMA GWA-14D Deep 713708.70 1595141.76 692.47 2.99 PVC 6.0 61.69 66.69 76.99 CAMA GWA-14S Shallow 713723.34 1595136.02 692.59 3.32 PVC 2.0 7.32 17.32 18.32 CAMA GWA-15D Deep 714238.22 1595018.39 692.32 3.09 PVC 6.0 106.29 111.29 120.09 CAMA GWA-15S Shallow 714249.18 1595015.57 692.45 3.20 PVC 2.0 6.20 21.20 23.20 CAMA GWA-17S Shallow 715837.34 1596266.54 667.89 3.19 PVC 2.0 31.19 41.19 42.69 CAMA IGWA-18D Deep 717249.80 1593878.20 699.37 3.08 PVC 6.0 151.08 156.08 158.08 CAMA Buck Steam Station Page 1 of 3 CSA Supplement 2 Table 1-1: Well Construction Information Monitoring Well ID GWA-18S GWA-19D Monitoring Well Type Shallow Deep Northing 717257.00 716110.89 Easting 1593884.23 1592262.25 TOC Elevation Stick-up . 699.92 678.20 Casing 2.94 2.93 Casing Type PVC PVC Casing Diameter 2.0 6.0 Top. Screen 129.94 89.73 Bottom Screen 139.94 94.73 Depth 140.94 107.93 Program CAMA CAMA GWA-195 Shallow 716111.14 1592244.44 677.59 2.95 PVC 2.0 42.75 52.75 52.95 CAMA GWA-ID Deep 712252.92 1592879.30 710.18 2.98 PVC 6.0 87.98 92.98 571.20 CAMA GWA-1S Shallow 712255.59 1592889.01 709.36 2.51 PVC 2.0 7.51 22.51 686.85 CAMA GWA-20D Deep 714201.69 1591336.20 644.28 3.01 PVC 6.0 40.71 45.71 52.01 CAMA GWA-20S Shallow 714194.33 1591342.03 644.67 3.08 PVC 2.0 7.08 17.08 18.58 CAMA GWA-22D Deep 714920.24 1591248.69 638.33 3.20 PVC 6.0 28.70 33.70 596.23 CAMA GWA-2BR Bedrock 714963.70 1594971.82 702.81 3.04 PVC 6.0 138.04 143.04 542.57 CAMA GWA-2BRU Deep 714953.07 1594964.54 702.20 3.12 PVC 6.0 109.12 114.12 580.28 CAMA GWA-2S Shallow 714981.38 1594978.13 702.93 3.31 PVC 2.0 18.31 33.31 38.31 CAMA GWA-3BR Bedrock 716077.11 1596246.49 634.27 3.03 PVC 6.0 65.03 70.03 548.44 CAMA GWA-3BRU Deep 716091.61 1596234.07 636.37 3.27 PVC 6.0 43.47 48.47 586.10 CAMA GWA-3S Shallow 716083.61 1596234.85 635.98 3.18 PVC 2.0 8.18 23.18 611.80 CAMA GWA-41) Deep 716755.22 1595910.08 676.16 3.15 PVC 6.0 99.65 104.65 563.81 CAMA GWA-4S Shallow 716756.33 1595898.77 676.29 3.26 PVC 2.0 28.26 43.26 632.03 CAMA GWA-5BRU Deep 717419.53 1594790.87 663.83 3.21 PVC 6.0 119.71 124.71 534.12 CAMA GWA-5S Shallow 717428.62 1594787.92 663.78 3.25 PVC 2.0 32.55 47.55 614.23 CAMA GWA-6BR Bedrock 716806.16 1593743.12 687.51 3.13 PVC 6.0 96.13 101.13 575.88 CAMA GWA-6BRU Deep 716813.49 1593754.16 687.45 3.23 PVC 6.0 60.23 65.23 613.42 CAMA GWA-6S Shallow 716795.62 1593733.93 687.74 3.49 PVC 2.0 35.49 45.49 642.15 CAMA GWA-71) Deep 716421.84 1593359.22 715.49 3.22 PVC 6.0 91.22 96.22 606.47 CAMA GWA-7S Shallow 716429.67 1593364.76 715.70 3.17 PVC 2.0 62.77 77.77 637.03 CAMA GWA-81) Deep 715565.94 1593157.59 717.28 2.87 PVC 6.0 112.87 117.87 597.41 CAMA GWA-9BR Bedrock 715547.68 1592296.54 692.81 3.15 PVC 6.0 182.15 187.15 463.26 CAMA GWA-91) GWA-9S MW-101) Deep Shallow Deep 715538.55 715517.91 716740.33� 1592298.18 1592299.46 1593624.59 693.14 693.24 682.27 3.15 2.79 3.16 PVC PVC PVC 6.0 2.0 2.0 123.15 20.79 37.86 128.15 35.79 52.86 513.99 656.45 629.17 CAMA CAMA NPDES MW-11D Deep 716889.80 1595177.00 637.46 3.06 PVC 2.0 35.56 40.56 595.99 NPDES MW-11S Shallow 716885.10 1595175.00 636.94 3.15 PVC 2.0 6.15 21.15 616.46 NPDES MW-13D Deep 713258.90 1594992.00 696.76 1.58 PVC 2.0 29.58 34.58 660.97 NPDES MW-31) Deep 716878.00 1594850.00 652.77 2.60 PVC 2.0 102.30 107.30 545.47 Voluntary MW-3S Shallow 716879.00 1594843.00 652.27 3.06 PVC 2.0 8.06 18.06 634.21 Voluntary MW-41) Deep 716646.00 1595272.00 655.72 2.03 PVC 2.0 51.83 56.83 598.89 Voluntary MW-4S Shallow 716644.00 1595275.00 656.00 2.30 PVC 2.0 21.30 31.30 624.70 Voluntary MW-51) Deep 715747.00 1595925.00 678.43 2.61 PVC 2.0 82.61 87.61 590.82 Voluntary MW-5S Shallow 715746.00 1595920.00 678.72 2.90 PVC 2.0 22.90 32.90 645.82 Voluntary MW-6BR Bedrock 712859.08 1593924.57 721.76 3.31 PVC 6.0 150.31 155.31 168.31 CAMA MW-61) Deep 712873.00 1593919.00 721.25 2.61 PVC 2.0 106.11 111.11 612.75 NPDES MW-6S Shallow 712874.00 1593924.00 721.10 2.66 PVC 2.0 20.66 30.66 693.10 NPDES MW-7D Deep 712532.80 1593011.00 710.62 2.95 PVC 2.0 101.95 106.95 603.52 NPDES MW-7S Shallow 712537.30 1593013.00 710.72 2.90 PVC 2.0 5.90 20.90 689.37 NPDES 1VIW-1S Shallow 714428.00 1591726.00 655.35 2.5 PVC 2.0 8.93 18.93 652.85 Voluntary MW-1D Deep 714432.00 1591726.00 654.85 2.5 PVC 2.0 51.48 56.48 652.35 Voluntary MW-2S Shallow 715031.00 1591923.00 673.94 2.46 PVC 2.0 26.44 36.44 671.48 Voluntary MW-2D Deep 715035.00 1591925.00 674.59 2.84 PVC 2.0 80.84 85.84 671.75 Voluntary MW-8D Deep 711955.50 1592191.00 713.19 2.69 PVC 2.0 58.69 63.69 649.48 NPDES MW-8S Shallow 711960.90 1592189.00 712.94 2.46 PVC 2.0 8.46 23.46 689.49 NPDES MW-9D Deep 714907.50 1591258.00 638.78 3.12 PVC 2.0 27.32 32.32 605.81 NPDES MW-9S Shallow 714910.40 1591262.00 638.51 3.21 PVC 2.0 7.01 17.01 621.56 NPDES Buck Steam Station Page 2 of 3 CSA Supplement 2 Table 1-1: Well Construction Information Notes: 1. TOC indicates top of casing 2. TOC elevation based on NAVD 88 vertical datum 3. Northing and Easting based on NAD83 horizontal datum 4. ft indicates measurements in feet 5. btoc indicates measurements below the top of casing 6. Deep and Bedrock CAMA wells installed with 2-inch riser; Casing value listed for D/BR wells indicates outer casing diameter. Page 3 of 3 Buck Steam Station CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells Well ID MW-IS NCAC 2L Standard: Units: Sample Date 11/15/2006 NS NS °C mV Temperature • 16.95 NS 110/cm 409.4 NS 6.5 - 8.5 mg/L SU DO pH (Field) 7.3 500 mg/L TDS 270 10 mg/L Nitrate 0.77 250 mg/L Chloride 13.09 250 mg/L Sulfate 23.62 10 µg/L Arsenic <2 MW-1S 5/15/2007 16 399.7 6.77 380 0.52 10.9 27.3 <2 MW-IS 11/19/2007 17.66 - 418 6.87 289 0.41 12.53 33.67 <2 MW-1S 5/21/2008 15.6 - 401.6 6.81 160 0.67 13 32 <2 MW-IS 11/24/2008 15.6 -- 406 6.92 254 0.6 13 37 <2 MW-1S 5/12/2009 17.05 - 355 6.88 220 1.91 20 12 <1 MW-IS 11/2/2009 17.7 - 367 6.7 248 1.71 19 15 <1 MW-1S 5/25/2010 17.1 355 6.88 219 2.25 22 7.9 <1 MAD 11/15/2006 15.39 - 405.8 7.27 270 0.19 10.43 25.79 <2 MAD 5/15/2007 18.49 415.1 6.83 268 0.17 9.22 29.87 <2 MAD 11/19/2007 17.49 -- 417.7 6.81 258 0.09 10.66 36.99 <2 MAD 5/21/2008 16.21 415 6.88 160 0.15 11 36 <2 MAD 11/24/2008 15.1 -- 415 6.95 260 <0.23 11 40 <2 MAD 5/12/2009 16.9 405 6.93 248 0.43 13 28 <1 MAD MAD MW-2S MW-2S MW-2S MW-2S MW-2D 11/2/2009 5/25/2010 11/15/2006 5/16/2007 11/19/2007 5/21/2008 11/15/2006 16.04 - 16.49 15 - 15.6 14.65 - 15.6 14.89 - 399 388 250.1 253.6 263 248.3 199.1 6.68 6.83 6.02 5.47 5.88 5.620 6.6 254 208 160 184 154 160 160 0.54 1.06 <0.02 0.02 <0.02 <0.02 0.53 13 15 7.67 8.86 6.99 9.1 5.28 28 19 85.69 94.76 94.63 84 37.63 <1 <1 <2 <2 <2 <2 <2 MW-2D 5/16/2007 15.85 188.4 6.12 MW-2D 11/19/2007 14.99 - 227.4 6.21 MW-2D 5/21/2008 15.41 219 6.22 MW-3S 11/15/2006 16.34 - 222.5 5.49 MW-3S 5/15/2007 14.63 230.3 5.4 MW-3S 11/19/2007 17.04 - 222.1 5.37 MW-3S 5/21/2008 15.03 214.7 5.45 MW-3S 11/24/2008 15.92 - 198.5 5.66 MW-3S 5/12/2009 15.27 199.4 5.63 MW-3S 11/2/2009 17.86 - 197.8 5.54 MW-3S 5/25/2010 16.05 - 197.2 5.5 MW-3D 11/15/2006 15.45 - 377.3 6.14 MW-3D 5/15/2007 16.11 367.5 6.12 MW-3D 11/19/2007 15.82 - 367.3 5.99 MW-3D 5/21/2008 16.21 358.4 6.12 MW-3D 11/24/2008 15.07 - 343.1 6.28 MW-3D 5/12/2009 16.62 339.3 6.27 MW-3D 11/2/2009 16.4 - 333.5 6.15 MW-3D 5/25/2010 16.88 324 6.1 MW-4S 11/14/2006 17.56 - 189.5 6.27 MW-4S 5/15/2007 16.94 182.3 6.16 MW-4S 11/19/2007 18.02 - 184.3 6.09 MW-4S 5/21/2008 15.48 186.9 6.1 MW-4S 11/24/2008 15.27 - 180.5 6.22 MW-4S 5/12/2009 15.11 184.3 6.23 MW-4S 11/2/2009 16.94 - 189.6 6.15 MW-4S 5/25/2010 15.93 189.2 6.09 MW-4D 11/14/2006 16.64 - 199.5 6.15 MW-4D 5/15/2007 16.97 196.4 6.03 MW-4D 11/19/2007 17.04 - 194.1 5.93 MW-4D 5/21/2008 15.96 - 198.5 5.93 MW-4D 11/24/2008 15.21 -- 188.2 6.14 MW-4D 5/12/2009 15.7 - 195.7 6.09 MW-4D 11/2/2009 16.15 -- 194.4 6.06 MW-4D 5/25/2010 16.36 - 195.4 6 168 0.45 4.78 33.92 <2 165 0.35 4.51 53.98 <2 38 0.39 5.6 51 <2 130 <0.02 10.8 64.93 <2 152 <0.02 9.18 71.71 <2 114 <0.02 10.6 65.83 <2 66 <0.02 10 61 <2 114 <0.23 10 57 <2 108 0.04 10 55 <1 130 <0.02 9.8 52 <1 86 <0.02 9.4 53 <1 250 <0.02 9.09 106.07 <2 268 <0.02 7.99 114 <2 237 <0.02 8.99 105.48 <2 i 110 <0.02 8.6 100 <2 220 <0.23 9 94 <2 202 <0.02 9.5 88 <1 224 <0.02 9 81 <1 187 <0.02 9.1 81 <1 110 <0.02 8.22 25.35 <2 152 <0.02 7.91 24.37 <2 87 <0.02 7.62 23.57 <2 140 <0.02 8 22 <2 48 <0.23 8.3 23 <2 94 0.03 9 23 <1 88 0.03 10 23 <1 87 <0.02 8.5 22 <1 140 <0.02 8.15 30.41 <2 158 <0.02 7.64 30.4 <2 118 <0.02 6.39 30.41 <2 14 <0.02 5.8 28 <2 72 <0.23 6.4 29 <2 114 <0.02 8.5 29 <1 150 <0.02 8.4 28 <1 124 <0.02 8.9 28 <1 Page 1 of 18 Buck Steam Station CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: Units: NS °C Well ID MW-5S Sample Date 11/15/2006 Temperature 15.88 MW-5S 5/16/2007 16.13 MW-5S 11/20/2007 15.44 MW-5S 5/21/2008 16.97 MW-5S 11/24/2008 15.82 MW-5S 5/12/2009 15.93 MW-5S 11/2/2009 16.35 MW-5S 5/25/2010 16.9 MW-5D 11/15/2006 15.98 MW-5D 5/16/2007 16.36 MW-SD 11/20/2007 15.59 MW-5D 5/21/2008 16.92 MW-5D 11/24/2008 15.86 MW-5D 5/12/2009 16.11 MW-SD 11/2/2009 16.32 MW-5D 5/25/2010 17.13 MW-6S 11/14/2006 15.37 MW-6S 5/15/2007 14.69 MW-6S 11/20/2007 14.13 MW-6S 5/21/2008 15.88 MW-6S 11/24/2008 13.56 MW-6S 5/12/2009 14.48 MW-6S 11/2/2009 14.64 MW-6S 5/25/2010 15.6 MW-65 3/7/2011 15.6 MW-6S 7/5/2011 15.87 MW-6S 11/2/2011 14.46 MW-6S 3/7/2012 15.65 MW-6S 7/3/2012 16.27 MW-6S 11/7/2012 14.58 MW-6S 3/6/2013 15.09 MW-6S 7/8/2013 16.24 MW-6S 11/4/2013 14.97 MW-6S 3/3/2014 15.38 MW-65 7/1/2014 15.79 MW-6S 11/3/2014 14.82 MW-65 3/4/2015 15.43 MW-6S 7/6/2015 15.95 MW-65 11/3/2015 15.52 MW-6S 3/1/2016 15.77 MW-6D 11/14/2006 15.86 MW-6D 5/15/2007 16.32 MW-6D 11/20/2007 14.27 MW-6D 5/21/2008 16.14 MW-6D 11/24/2008 14.05 MW-6D 5/12/2009 15.15 MW-6D 11/2/2009 15.01 MW-6D 5/25/2010 15.93 MW-6D 3/7/2011 15.21 MW-6D 7/5/2011 16.48 MW-6D 11/2/2011 14.32 MW-6D 3/7/2012 15.32 MW-6D 7/3/2012 15.99 MW-6D 11/7/2012 14.99 MW-6D 3/6/2013 14.5 MW-6D 7/8/2013 16.32 NS NS NS mV ORP go/cm SpecificDo mg/L -- 148.9 143.7 - 157.1 158.1 - 157.3 159.5 - 157.4 - - - 152.8 196.2 193.4 190.4 188.7 180 - 191 -- 191.1 - 195.4 -- 43.1 - 39.2 -- 41.7 - 42.7 - 36 - 42 - 40 - 51 - 43 - 48 -- 46 -- 408 53 0.43 362 52 0.43 432 48 0.12 378 52 0.56 273 54 0.2 354 50 0.1 364 49 1.24 483 45 0.69 523 46 1.44 409 51 2.02 377 55 1.3 385 53 1.58 385 62 3.19 -- 72.8 -- - 74.3 -- 83 - 90.3 -- 94 - 112 -- 112 - 125 -- 123 - 127 -- 125 -- 365 133 2.45 334 133 2.39 393 133 2.29 315 138 2.36 230 144 2.4 6.5 - 8.5 500 10 250 250 10 SU I -I (Field) ®5.8 mg/L TDS mg/L Nitrate mg/L Chloride mg/L Sulfate µg/L Arsenic 9111 90 0.04 7.67 28.9 <2 5.84 106 0.16 7.97 30.57 <2 5.81 I 73 <0.02 8.73 31.64 <2 5.77 94 0.34 9.6 32 <2 5.9 I 40 <0.23 8.2 35 <2 5.88 54 0.14 9 36 <1 5.82 110 0.05 8.8 35 <1 5.75 66 0.1 9.5 36 <1 6.04 I 130 0.02 9.12 25.49 <2 6.12 168 0.02 8.3 25.11 <2 6.13 I 113 <0.02 9.43 23.66 <2 6.02 130 0.02 9.3 23 <2 6.13 I 68 <0.23 8.6 21 <2 6.08 134 <0.02 9.4 21 <1 6 I 142 0.02 9.1 22 <1 5.96 113 <0.02 9.5 22 <1 5.76 I 24 0.33 4.13 0.18 <2 5.28 36 0.3 4.23 0.23 <2 5.48 55 0.36 3.81 0.2 <2 5.42 <10 0.39 4.5 0.18 <2 5.29 I <20 0.26 3.5 <1 <2 5.4 24 0.21 4.3 0.3 <1 5.32 I <20 0.2 4.2 0.18 <1 5.3 <25 <0.02 4.7 <0.1 <1 5.54 I 32 <0.1 4.9 0.19 <1 5.09 39 0.23 4.7 0.19 <1 5.41 I 21 0.19 4.8 0.26 <1 5.26 33 0.5 4.5 0.18 <1 4.48 I <250 0.49 4 0.2 <1 5.24 38 0.38 4.2 0.2 <1 5.13 I 47 0.4 4.6 0.21 <1 5.07 63 0.53 4.6 0.25 <1 5.19 I 50 0.54 4.6 0.24 <1 5.12 36 0.51 4.7 0.16 <1 5.23 I 32 0.3 4.7 0.14 <1 5.27 39 0.43 4.8 0.14 <1 5.24 I 36 0.51 4.9 0.15 <1 5.28 38 0.27 4.4 0.15 <1 5.36 35 0.45 4.7 0.17 <1 5.12 � 48 0.07 4.4 0.15 <1 7.05 68 0.68 1.21 1.3 <2 6.94 102 0.66 1.32 1.31 <2 6.98 48 0.64 1.63 1.43 <2 6.9 73 0.58 2 1.3 <2 6.8 50 0.52 1.7 1.3 <2 6.84 62 0.54 2.3 1.2 <1 6.67 78 0.51 2.1 1.2 <1 6.73 94 0.52 2.2 1.1 <1 6.98 100 0.55 2.5 1.3 <1 6.63 97 0.56 2.7 1.4 <1 6.83 93 0.53 2.6 1.2 <1 6.8 106 0.54 2.6 1.3 <1 <250 0.53 2.5 1.5 <1 6.69 110 0.49 2.7 1.4 <1 6.58 120 0.49 2.8 1.4 <1 6.55 140 0.51 2.8 1.6 <1 Page 2 of 18 Buck Steam Station CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: NS NS NS NS 6.5 - 8.5 500 10 250 250 10 Units: °C mV go/cm mg/L SU mg/L mg/L mg/L mg/L µg/L Well ID Sample Date Temperature ORP SpecificDO pH (Field) TDS Nitrate Chloride Sulfate Arsenic MW-6D 11/4/2013 14.85 291 146 1.95 6.6 120 0.48 3 1.5 <1 MW-6D 3/3/2014 14.97 273 144 2.12 6.58 120 0.52 4.3 0.17 <1 MW-6D 7/1/2014 16.43 449 150 1.91 6.69 110 0.48 3.2 1.8 <1 MW-6D 11/3/2014 15.16 479 145 2.11 6.67 110 0.5 3 1.7 <1 MW-6D 3/4/2015 15.2 327 145 2.02 6.69 120 0.48 3 1.7 <1 MW-6D 7/6/2015 15.85 324 147 2.03 6.74 120 0.48 3 1.7 <1 MW-6D 11/3/2015 15.56 335 145 2 6.8 100 0.46 3 1.6 <1 MW-6D 3/1/2016 14.96 505 151 0 6.59 110 0.48 3.2 2 <1 MW-75 3/8/2011 13.21 -- 106 -- 95 0.14 5.6 3.4 <1 MW-7S 7/5/2011 15.84 - 102 5.88 96 0.17 5.8 1.8 <1 MW-7S 11/2/2011 15.78 -- 102 -- 6.18 I 110 0.15 9.6 2.4 <1 MW-7S 3/7/2012 14.35 416 100 2.48 5.82 93 0.15 6.3 1.3 <1 MW-7S 7/3/2012 16.24 371 100 2.02 5.93 I <250 0.15 5.5 0.94 <1 MW-7S 11/7/2012 15.98 428 101 1.54 5.86 96 0.09 9 2.4 <1 MW-7S 3/6/2013 14.88 359 98 1.98 5.78 I 100 0.11 7 2.4 <1 MW-7S 7/8/2013 15.81 260 95 1.48 5.8 120 0.12 6.4 1.5 <1 MW-7S 11/4/2013 16.42 319 99 1.38 5.84 I 120 0.14 5.8 0.85 <1 MW-7S 3/3/2014 14.51 318 97 1.82 5.76 98 0.16 7.8 0.85 <1 MW-7S 7/1/2014 15.27 420 106 1.19 5.76 I 95 0.12 8.9 0.88 <1 MW-7S 11/3/2014 15.76 386 102 1.08 5.83 95 0.14 6.4 0.7 <1 MW-7S 3/4/2015 14.56 374 94 3.02 5.85 I 89 0.23 7.3 1.2 <1 MW-7S 7/6/2015 15.06 358 101 2.13 5.93 97 0.13 5.7 0.55 <1 MW-75 11/3/2015 16.21 346 117 2.3 5.95 100 0.61 13 1 <1 MW-7S 3/1/2016 14.7 498 86 1.04 5.67 83 0.3 6.6 0.81 <1 MW-7D 3/8/2011 14.8 -- 248 -- 7.16 170 0.32 3.7 32 <1 MW-7D 7/5/2011 17 - 184 6.9 130 0.33 4.8 14 <1 MW-7D 11/2/2011 15.17 -- 168 -- 7.19 160 0.44 2.5 5 <1 MW-7D 3/7/2012 14.95 283 155 1.56 6.85 110 0.37 6.6 8.1 <1 MW-7D 7/3/2012 15.71 316 161 1.94 6.88 <250 0.49 3.6 4.3 <1 MW-7D 11/7/2012 15.22 403 158 2.09 6.82 150 0.48 2.4 2.5 <1 MW-7D 3/6/2013 14.06 323 131 1.61 100 0.06 7.4 8.8 <1 MW-7D 7/8/2013 16.26 147 148 0.88 6.52 130 0.02 8.3 8.6 <1 MW-7D 11/4/2013 15.71 300 152 2.22 6.76 120 0.53 2.6 2.1 <1 MW-7D 3/3/2014 14.8 270 151 0.59 110 0.05 7.9 6.7 <1 MW-7D 7/1/2014 15.79 340 137 1.91 110 0.44 4.3 2.7 <1 MW-7D 11/3/2014 15.16 372 145 1.59 6.52 MW-7D 3/4/2015 14.83 324 110 3.53 6.67 MW-7D 7/6/2015 15.7 325 148 2.46 6.71 MW-7D 11/3/2015 15.66 303 155 1.06 6.76 MW-7D 3/1/2016 15.09 486 143 0.41 6.67 MW-8S 3/7/2011 13.85 -- 214 -- 6.05 MW-8S 7/5/2011 17.21 - 128 6.13 MW-8S 11/2/2011 17.53 -- 154 -- 6.11 MW-8S 3/7/2012 13.99 359 204 1.15 6.25 MW-8S 7/3/2012 16.5 334 164 1.31 6.19 MW-8S 11/7/2012 16.72 355 160 1.7 6.25 MW-8S 3/6/2013 10.46 350 180 4.36 6.01 MW-8S 7/8/2013 20.17 311 152 3.82 6.19 MW-85 11/4/2013 10.91 318 142 4.63 6.25 MW-8S 3/3/2014 11.33 347 140 3.76 6.03 MW-85 7/1/2014 15.18 346 148 3.18 6.04 MW-8S 11/3/2014 15.51 389 143 3.81 6.29 MW-85 3/4/2015 13.45 372 235 2.08 5.96 MW-8S 7/6/2015 14.61 381 235 1.52 6.07 MW-85 11/3/2015 16.48 363 164 2.92 6.18 MW-8S 3/2/2016 13.5 448 174 2.29 6.13 110 0.5 3.4 2.3 <1 80 0.49 7.8 12 <1 120 0.59 2.2 1.6 <1 110 0.67 3.1 6.5 <1 100 0.71 3.5 2.5 <1 150 0.71 3.7 12 <1 120 1.2 3.2 3.7 <1 150 1.1 3.2 3.2 <1 134 0.69 3.4 4.8 <1 <250 1.1 2.6 3 <1 140 1.1 2.9 2.7 <1 150 1.2 3.3 7 <1 150 1.5 2.9 3.7 <1 130 1.6 2.9 1.7 <1 130 1.5 3 2.9 <1 130 1.4 3.2 2 <1 120 170 1.5 0.78 3.1 3.7 2.6 7.5 <1 <1 170 0.71 3.9 4.1 <1 130 1.2 3.3 2.4 <1 150 1.1 3.7 3.5 <1 Page 3 of 18 Buck Steam Station CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: Units: NS °C Well ID MW-8D Sample Date 3/7/2011 Temperaturg, 14.92 MW-8D 7/5/2011 17.95 MW-8D 11/2/2011 16.12 MW-8D 3/7/2012 14.61 MW-8D 7/3/2012 15.64 MW-8D 11/7/2012 15.39 MW-8D 3/6/2013 12.7 MW-8D 7/8/2013 16.74 MW-8D 11/4/2013 14.59 MW-8D 3/3/2014 13.68 MW-8D 7/1/2014 16.09 MW-8D 11/3/2014 14.96 MW-8D 3/4/2015 14.62 MW-8D 7/6/2015 15.31 MW-8D 11/3/2015 15.32 MW-8D 3/2/2016 14.57 MW-9S 3/7/2011 13 MW-9S 7/5/2011 18.99 MW-9S 11/2/2011 19.67 MW-9S 3/7/2012 14.33 MW-95 7/3/2012 18.36 MW-9S 11/7/2012 17.89 MW-9S 3/7/2013 12.58 MW-9S 7/9/2013 18.27 MW-9S 11/5/2013 17.74 MW-9S 3/4/2014 12.11 MW-9S 7/1/2014 17.01 MW-9S 11/3/2014 18.05 MW-9S 3/4/2015 12.38 MW-9S 7/6/2015 17.44 MW-9S 11/3/2015 18.28 MW-9S 3/1/2016 14.13 MW-9D 3/7/2011 14.94 MW-9D 7/5/2011 18.61 MW-9D 11/2/2011 16.77 MW-9D 3/7/2012 16.23 MW-9D 7/3/2012 17 MW-9D 11/7/2012 16.13 MW-9D 3/7/2013 15.64 MW-9D 7/9/2013 16.38 MW-9D 11/5/2013 16.1 MW-9D 3/4/2014 15.58 MW-9D 7/1/2014 16.11 MW-9D 11/3/2014 16.04 MW-9D 3/4/2015 15.61 MW-9D 7/6/2015 15.77 MW-9D 11/3/2015 16.17 MW-9D 3/1/2016 15.99 MW-10D 3/8/2011 15.27 MW-10D 7/5/2011 17.71 MW-10D 11/2/2011 15.22 MW-10D 3/7/2012 15.92 MW-10D 7/3/2012 16.61 MW-10D 11/7/2012 15.38 MW-10D 3/6/2013 15.48 MW-10D 7/8/2013 16.03 NS NS NS mV ORP go/cm SpecificDO mg/L -- 139 - 129 -- 128 -- 366 128 4.09 334 126 4.14 347 126 4.16 339 127 5.02 322 128 4.08 315 127 4.2 338 131 4.48 338 127 4.59 380 130 4.28 365 130 4.33 363 127 4.48 372 128 4.38 430 132 4.05 -- 171 -- - 177 -- 175 -- 406 179 1.92 365 184 3.86 476 190 1.9 348 194 4.99 356 209 1.13 329 218 3.67 348 218 3.8 516 226 3.68 495 246 3.84 353 249 3.86 366 262 3.55 358 275 2.64 521 257 0.89 -- 187 -- - 182 -- 183 -- 398 186 2.01 368 183 1.87 467 185 2.08 346 193 1.91 356 198 1.96 324 203 1.91 345 213 2.01 509 218 1.9 537 227 1.78 346 243 1.65 365 249 1.93 357 253 1.62 520 257 0.32 -- 763 -- - 738 -- 747 -- 380 753 1.67 327 756 1.65 453 741 1.87 336 782 1.75 W 328 793 1.93 h 6.5 - 8.5 500 10 250 SU mg/L mg/L mg/L 250 10 6.43 9111 6.33 120 100 2.2 2.1 3.3 3.3 5.9 2.9 <1 <1 6.3 I 130 2.1 3.4 2.4 <1 6.52 123 2.1 3.2 2.4 <1 6.36 6.33 6.17 6.21 6.32 6.19 6.16 6.38 6.25 6.32 6.34 6.33 <250 2.2 3 2.1 <1 120 2.1 3.2 2 <1 120 2.1 3.2 2.1 <1 130 2.2 3.4 2.1 <1 120 2.1 3.2 1.8 <1 110 2.2 3.3 2.1 <1 120 2.2 3.4 2 <1 110 2.3 3.4 2 <1 110 2.1 3.3 1.9 <1 120 2.2 3.3 1.8 <1 100 2.1 3.4 1.9 <1 120 2.1 3.4 2.1 <1 6.54 150 0.16 6.2 10 <1 6.25 150 0.15 6.1 11 <1 6.62 170 0.17 6.6 10 <1 6.47 5.32 6.11 6.03 6.04 6.1 5.78 6.23 6.23 6.11 6.13 6.23 5.95 6.46 6.23 6.48 6.46 5.22 6.19 6.1 6.14 6.13 5.93 6.23 6.23 6.17 6.22 6.32 137 0.13 5.8 13 <1 <250 0.19 5.2 15 <1 150 0.19 6.2 14 <1 170 0.19 6.2 18 <1 190 0.27 7.3 25 <1 180 0.37 6.8 26 <1 180 0.41 6 30 <1 190 0.55 6.7 33 <1 190 0.59 7.4 37 <1 180 0.44 7.1 38 <1 210 0.43 7.3 42 <1 200 0.47 7.8 43 <1 190 0.38 6.4 42 <1 160 0.19 6.4 10 <1 140 0.19 6.3 8.8 <1 170 0.17 6.6 9.2 <1 157 0.17 6.4 9.1 <1 <250 0.17 5.6 9.3 <1 160 0.14 6.5 10 <1 170 0.17 6.7 13 <1 170 0.17 6.9 15 <1 170 0.19 7 16 <1 180 0.25 6.9 22 <1 180 0.26 7.3 26 <1 170 0.25 7.4 27 <1 180 0.28 7.6 34 <1 200 0.27 7.5 36 <1 180 0.29 8 37 <1 6.06 200 0.34 7.8 40 <1 6.33 0.88 6.8 1111116 3& <1 5.98 490 1 6.5 320 <1 6.17 600 0.9 6.5 i350 <1 6.12 561 0.98 5.9 330 <1 5.85 604 1 5.2 340 <1 5.81 580 0.87 5.5 340 <1 5.52 630 0.93 5.5 �&50 <1 5.74 660 I 1 5.7 �380 <1 Buck Steam Station Page 4 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: NS NS NS NS 6.5 - 8.5 500 10 250 250 Units: .0 mV go/cm mg/L SU mg/L mg/L mg/L mg/I Well ID Sample Date Temperature ORP SpecificDO MMEW C. TDS Nitrate MW-10D 11/5/2013 15.43 348 802 2.09 5' � 01.1 5.4, MW-10D 3/4/2014 15.16 381 805 2.08 5.53 640 1.2 5.5 360 MW-10D 7/1/2014 16.1 377 799 2.22 5.8 650 1.3 5.5 390 MW-10D 11/3/2014 15.38 464 812 2.25 5.84 630 1.3 5.5 390 MW-10D 3/4/2015 15.46 368 829 2.07 5.75 650 1.1 5.3 1&6 390 MW-10D 7/10/2015 15.95 385 844 2.39 5.74 700 1.1 5.3 400 MW-10D 11/3/2015 15.73 366 839 2.04 5.88 660 A 0.95 5.6 390 MW-10D 3/2/2016 14.99 471 844 1.85 5.44 670 in 1.3 5.7 380 MW-11S 3/7/2011 13 97 -- 193 -- 6 22 120 <0 1 11 23 MW-11S 7/5/2011 16.33 - 189 6.03 MW-11S 11/2/2011 15.8 -- 190 -- 6.16 MW-11S 3/7/2012 15.42 405 192 0.59 6.16 MW-11S 7/3/2012 16.21 324 180 0.37 5.97 MW-11S 11/7/2012 16.1 351 184 0.42 6.27 MW-11S 3/7/2013 13.98 345 185 0.78 5.86 MW-11S 7/9/2013 16.29 338 192 0.6 5.87 MW-11S 11/5/2013 16.35 328 200 0.43 5.83 MW-11S 3/4/2014 14.24 317 204 0.41 5.85 MW-11S 7/1/2014 16.48 310 208 0.45 5.96 MW-11S 11/3/2014 16.85 337 218 0.46 6.19 MW-11S 3/4/2015 14.76 381 226 0.64 6.04 MW-11S 7/6/2015 15.69 363 240 0.57 6.13 MW-11S 11/3/2015 17.25 388 246 0.74 6.11 MW-11S 3/2/2016 14.39 409 254 0 6.13 MW-11D 3/7/2011 15.52 -- 177 -- 5.91 MW-11D 7/5/2011 16.57 - 178 5.79 MW-11D 11/2/2011 15.32 -- 177 -- 5.94 MW-11D 3/7/2012 16.39 404 175 0.5 6 MW-11D 7/3/2012 16.79 364 171 0.29 5.74 MW-11D 11/7/2012 15.29 373 172 0.72 6.01 MW-11D 3/7/2013 14.26 359 174 1.81 5.76 MW-11D 7/9/2013 17.07 353 176 0.36 5.7 MW-11D 11/5/2013 10.04 355 185 2.08 5.45 MW-11D 3/4/2014 12.41 338 170 0.45 5.72 MW-11D 7/1/2014 18.93 331 175 0.4 5.82 MW-11D 11/3/2014 16.07 365 175 0.27 5.94 MW-11D 3/4/2015 16.17 389 172 0.23 5.86 MW-11D 7/6/2015 16.21 378 176 0.26 5.95 MW-11D 11/3/2015 16.26 403 200 0.42 5.9 MW-11D 3/2/2016 16.17 417 170 0 5.98 MW-12S 3/8/2011 13.8 -- 116 -- 6.12 MW-12S 7/5/2011 15.81 - 92 6.02 MW-12S 11/2/2011 15.99 -- 95 -- 6.3 MW-12S 3/7/2012 14.8 397 86 4.18 6.21 MW-12S 7/3/2012 16.22 367 75 4.55 5.97 MW-12S 11/7/2012 16.25 335 78 3.97 6.24 MW-12S 3/7/2013 12.26 351 91 3.58 5.85 MW-12S 7/9/2013 16.3 362 79 3.53 5.85 MW-12S 11/4/2013 16.36 327 80 3.28 5.96 MW-12S 3/4/2014 12.04 351 73 5.14 5.86 MW-12S 7/1/2014 15.13 346 71 5.38 5.94 MW-12S 11/3/2014 16.07 353 72 4.98 6.12 MW-12S 3/4/2015 13.79 384 71 5.2 6 MW-12S 7/6/2015 14.61 352 67 6.08 6.14 MW-12S 11/3/2015 16.33 366 71 4.87 6.09 MW-12S 3/1/2016 14.4 453 68 5.75 5.97 10 u 120 <0.023 11 22 <1 130 <0.023 10 22 <1 122 <0.02 8 17 <1 <250 <0.023 9.2 20 <1 120 <0.023 9.3 20 <1 130 <0.023 9.7 20 <1 140 <0.023 11 22 <1 130 <0.023 12 21 <1 150 <0.023 14 21 <1 130 <0.023 15 23 <1 140 <0.023 17 24 <1 140 <0.023 19 25 <1 160 <0.023 20 29 <1 140 <0.023 21 29 <1 160 <0.023 25 31 <1 140 <0.1 9.4 3.6 <1 160 <0.023 10 39 <1 160 <0.023 10 36 <1 151 0.04 10 34 <1 <250 <0.023 9.5 35 <1 190 <0.023 9.6 33 <1 240 0.03 10 33 <1 170 <0.023 10 35 <1 180 <0.023 9.6 33 <1 160 <0.023 10 32 <1 180 <0.023 10 34 1.2 150 <0.023 10 33 <1 130 0.02 10 30 <1 140 <0.023 10 33 <1 140 0.04 15 35 <1 140 <0.023 12 31 <1 110 0.62 4.2 15 <1 87 0.63 3.6 4 <1 110 0.59 2.6 5.1 <1 98 0.71 3.4 1.4 <1 <250 0.76 2.2 0.66 <1 94 0.66 2.4 0.68 <1 100 0.36 6.5 2.4 <1 110 0.7 3.7 0.58 <1 110 0.7 4 0.5 <1 95 0.77 3 0.38 <1 89 0.83 2.5 0.18 <1 94 0.78 2.7 0.31 <1 82 0.74 2.7 0.28 <1 95 0.82 2.4 0.2 <1 89 0.76 2.6 0.42 <1 92 0.77 2.7 0.28 <1 Page 5 of 18 Buck Steam Station CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: NS NS NS NS 6.5 - 8.5 500 10 250 250 Units: °C mV go/cm mg/L SU mg/L mg/L mg/L mg/L Well ID Sample Date Temperature ORP Specific Conductivity D• MW-12D 3/8/2011 15.03 -- 73 81 0.91 2.2 1.9 MW-12D 7/5/2011 16.2 - 67 6.17 80 0.93 2.3 1.1 MW-12D 11/2/2011 15.29 -- 69 -- 6.32 76 0.89 2.2 1.1 MW-12D 3/7/2012 15.47 401 67 6.84 6.25 85 0.89 2.1 0.62 MW-12D 7/3/2012 15.71 362 64 6.69 6.06 1 <250 0.9 1.9 0.48 MW-12D 11/7/2012 15.47 361 66 6.72 6.35 82 0.86 2.1 0.46 MW-12D 3/7/2013 15.39 338 67 6.7 5.89 I 74 0.88 2.1 0.39 MW-12D 7/9/2013 15.75 389 66 6.67 6.01 90 0.89 2.2 0.38 MW-12D 11/4/2013 15.61 333 66 6.51 6.15 I 83 0.86 2.1 0.35 MW-12D 3/4/2014 15.04 350 66 6.7 6.02 79 0.87 2.2 0.3 MW-12D 7/1/2014 15.59 349 66 6.77 6.07 I 79 0.89 2.2 0.3 MW-12D 11/3/2014 15.43 363 66 6.71 6.23 75 0.89 2.2 0.31 MW-12D 3/4/2015 15.21 395 67 6.77 6.14 I 72 0.87 2.2 0.31 MW-12D 7/6/2015 15.45 383 67 6.81 6.28 82 0.88 2.2 0.28 MW-12D 11/3/2015 15.44 377 67 6.8 6.22 I 75 0.88 2.2 0.33 MW-12D 3/1/2016 15.17 452 66 6.95 6.17 71 0.87 2.2 0.28 MW-13D 3/8/2011 14.58 -- 154 -- 6.21 130 2.1 6 3.2 MW-13D 7/5/2011 16.23 - 156 6.23 1 140 2.5 6 2.5 MW-13D 11/2/2011 15.17 -- 146 -- 6.35 1 140 2 6.1 2.2 MW-13D 3/7/2012 15.63 411 140 4.44 6.38 l 126 1.9 5.8 2.1 MW-13D 7/3/2012 15.45 425 148 3.79 6.15 1 <250 2.5 5.1 2.2 MW-13D 11/7/2012 15.24 360 143 3.84 6.33 130 2 5.6 2.1 MW-13D 3/6/2013 14.09 349 138 5 6.14 140 1.9 5.9 2 MW-13D 7/8/2013 16.67 301 147 4.05 6.2 MW-13D 11/4/2013 14.7 316 152 4.98 6.25 MW-13D 3/3/2014 11.36 343 141 4.84 6.15 MW-13D 7/1/2014 15.03 330 160 3.75 6.17 MW-13D 11/3/2014 14.85 371 161 3.95 6.3 MW-13D 3/4/2015 15.03 369 143 3.96 6.2 MW-13D 7/6/2015 14.81 358 156 3.89 6.32 MW-13D 11/3/2015 15.02 370 145 3.93 6.29 MW-13D 3/1/2016 15.05 418 139 4.11 6.22 10 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 150 2.2 5 2.3 <1 140 2.3 5.8 2.2 <1 140 1.9 5.7 2.2 <1 1 150 2.6 6.2 2.3 <1 1 140 2.6 6.2 2.2 <1 130 1.9 5.9 2.1 <1 150 2.4 5.9 2.2 <1 9- 120 2 6.2 2.1 <1 130 1.8 5.6 2.1 <1 Notes: 1. °C indicates temperature measured in degrees celsius 2. mV indicates oxidation/reduction potential measured in millivolts 3. µf2/cm indicates specific conductivity measured in micromhos per centimeter 4. mg/L indicates concentrations measured in milligrams per liter 5. µg/L indicates concentrations measured in micrograms per liter 6. SU indicates pH values measured in standard units 7. NTU indicates turbidity values measured in Nephalometric Turbidity Units 8. Parameters are compared to standards found in 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina 9. 2L Standards are established as part of 15A NCAC 02L .0202 10. Interim Maximum Allowable Concentrations (IMACs) can be found in Appendix #1 of 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina Buck Steam Station Page 6 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 700 700 2 10 1 300 15 50 0.2 100 Units: µg/L µg/L µg/L µg/L mg/L µg/L µg/L µg/L µg/L µg/L D. :. la, Thafflurn Nickel MW-IS 11/15/2006 67 302 <0.5 4.88 0.013 �2 <2, 476 3.86 MW-1S 5/15/2007 69 322 <0.5 6.4 0.015 PF 3420 <2 402 4.55 MW-IS 11/19/2007 50 428 <0.5 5.29 0.009 3180 <2 215 3.19 MW-1S 5/21/2008 59 465 <0.5 3.94 0.008 4020 <2 325 3.42 MW-IS 11/24/2008 48 516 <0.5 5 0.007 2210 <2 148 2.86 MW-1S 5/12/2009 41 279 <0.5 1.4 0.003 1210 <1 82 <1 MW-IS 11/2/2009 35 254 <1 1.8 0.002 804 <1 63.7 1 MW-1S 5/25/2010 38.1 97.6 <1 2.33 0.003 1520 <1 78.3 1.19 MAD 11/15/2006 31 280 <0.5 1.18 0.004 161 <2 <2 MAD 5/15/2007 36 373 <0.5 <1 <0.002 125 <2 43 2 MAD 11/19/2007 27 466 <0.5 <1 <0.002 169 <2 27 <2 MAD 5/21/2008 27 506 <0.5 <1 <0.002 33 <2 27 <2 MW-1D 11/24/2008 23 593 <0.5 1.06 <0.002 55 <2 23 <2 MAD 5/12/2009 25 388 <0.5 <1 <0.001 34 <1 21 <1 MW-1D 11/2/2009 22.8 442 <1 <1 <0.001 20.5 <1 19.3 <1 MAD 5/25/2010 18.3 304 <1 <1 <0.001 50.4 <1 13 <1 MW-2S 11/15/2006 134 440 <0.5 <1 <0.002 102 <2 2.64 MW-2S 5/16/2007 128 463 <0.5 <1 <0.002 87 <2 400 2.93 MW-2S 11/19/2007 127 449 <0.5 <1 0.002 215 <2 466 3.71 MW-2S 5/21/2008 125 487 <0.5 <1 <0.002 177 <2 296 2.81 MW-2D 11/15/2006 200 <100 <0.5 0.033 <2 267 7.2 MW-2D 5/16/2007 89 <100 <0.5 0.011 <2 rw 66 3.24 MW-2D 11/19/2007 80 <60 <0.5 3.43 <0.002 166 <2 7 <2 MW-2D 5/21/2008 76 <100 <0.5 4.33 <0.002 124 <2 6 <2 MW-3S 11/15/2006 35 1309 <0.5 <1 <0.0 Uza <2 2672 <2 MW-3S 5/15/2007 30 1208 <0.5 <1 <0.002 PV 1076 <2 2796 2.21 MW-3S 11/19/2007 31 1260 <0.5 <1 <0.002 604 <2 2310 <2 MW-3S 5/21/2008 27 1210 <0.5 <1 <0.002 882 <2 2310 <2 MW-3S 11/24/2008 30 1180 <0.5 1.11 <0.002 1470 <2 1990 <2 MW-3S 5/12/2009 28 1130 <0.5 <1 <0.001 1750 <1 1990 1.1 MW-3S 11/2/2009 22.7 1260 <1 <1 <0.001 645 <1 1950 1.3 MW-3S 5/25/2010 22.9 1110 <1 <1 <0.001 f 947 <1 1850 1.28 MW-3D 11/15/2006 109 934 <0.5 <1 <0.002 <2 73 <2 MW-3D 5/15/2007 97 ` 919 <0.5 <1 0.003 83 <2 56 2 MW-3D 11/19/2007 98 866 <0.5 <1 <0.002 57 <2 48 <2 MW-3D 5/21/2008 98 881 <0.5 <1 <0.002 13 <2 49 <2 MW-3D 11/24/2008 88 r 805 <0.5 <1 <0.002 13 <2 43 <2 MW-3D 5/12/2009 91 780 <0.5 <1 <0.001 14 <1 42 <1 MW-3D 11/2/2009 83 817 <1 <1 <0.001 <10 <1 42.6 <1 MW-3D 5/25/2010 80.7 732 <1 <1 <0.001 <10 <1 39.1 <1 MW-4S 11/14/2006 32 483 <0.5 <1 <0.002 404 <2 286 <2 MW-4S 5/15/2007 30 487 <0.5 <1 0.002 435 <2 153 2 MW-4S 11/19/2007 35 466 <0.5 <1 <0.002 1040 <2 103 <2 MW-4S 5/21/2008 73 481 <0.5 1.69 0.003 6160 <2 159 <2 MW-4S 11/24/2008 32 456 <0.5 <1 <0.002 232 <2 72 <2 MW-4S 5/12/2009 100 494 <0.5 <1 0.002 1.9 192 <1 MW-4S 11/2/2009 43.8 505 <1 <1 <0.( W1360 <1 81 <1 MW-4S 5/25/2010 37.9 499 <1 <1 <0.001 694 <1 69.6 <1 MW-4D 11/14/2006 20 434 <0.5 <1 <0.002 105 <2 31 <2 MW-4D 5/15/2007 15 455 <0.5 <1 <0.002 11 <2 9 2 MW-4D 11/19/2007 18 461 <0.5 <1 <0.002 <10 <2 7 <2 MW-4D 5/21/2008 18 489 <0.5 <1 <0.002 24 <2 5 <2 MW-4D 11/24/2008 17 478 <0.5 <1 <0.002 <10 <2 <5 <2 MW-4D 5/12/2009 19 502 <0.5 <1 <0.001 165 <1 <5 <1 MW-4D 11/2/2009 16.3 533 <1 <1 <0.001 <10 <1 <5 <1 MW-4D 5/25/2010 17.1 528 <1 <1 <0.001 <10 <1 <5 <1 Buck Steam Station Page 7 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 700 700 2 10 1 300 15 50 0.2 100 Units: µg/L µg/L µg/L µg/L mg/L µg/L µg/L µg/L µg/L µg/L Well ID Sample Date Barium Boron Cadmium Chromium Copper Iron Lead Mangan -A L Thallium Nickel MW-5S 11/15/2006 34 230 <0.5 <1 0.002 185 <2 165 7 <2 MW-5S 5/16/2007 28 259 <0.5 1.2 0.003 114 <2 60 2 MW-5S 11/20/2007 49 242 <0.5 1.86 0.007 <2 62 <2 MW-5S 5/21/2008 37 243 <0.5 1.02 <0.002 194 <2 15 <2 MW-5S 11/24/2008 37 213 <0.5 1.58 <0.002 66 <2 7 <2 MW-5S 5/12/2009 37 202 <0.5 <1 <0.001 135 <1 8 <1 MW-5S 11/2/2009 39.9 210 <1 1.3 0.003 <1 28 <1 MW-5S 5/25/2010 32 222 <1 1.26 0.002 232 <1 8.74 <1 MW-SD 11/15/2006 24 388 <0.5 <1 <0.002 62 <2 17 <2 MW-5D 5/16/2007 19 384 <0.5 <1 <0.002 41 <2 8 2 MW-SD 11/20/2007 22 363 <0.5 <1 <0.002 40 <2 8 <2 MW-5D 5/21/2008 20 372 <0.5 <1 <0.002 12 <2 <5 <2 MW-SD 11/24/2008 20 340 <0.5 <1 <0.002 <10 <2 <5 <2 MW-5D 5/12/2009 22 349 <0.5 <1 <0.001 49 <1 <5 <1 MW-SD 11/2/2009 20.1 369 <1 <1 <0.001 <10 <1 <5 <1 MW-51) 5/25/2010 20.8 342 <1 <1 <0.001 <10 <1 <5 <1 MW-6S 11/14/2006 47 <100 <0.5 1.78 0.005 52 <2 5.33 MW-6S 5/15/2007 23 <100 <0.5 2.3 <0.002 36 <2 20 5.62 MW-6S 11/20/2007 39 <60 <0.5 2.58 0.002 799 <2 34 6.09 MW-6S 5/21/2008 43 <100 <0.5 2.05 0.002 995 <2 38 4.95 MW-6S 11/24/2008 40 <100 <0.5 2.36 0.002 710 <2 40 5.2 MW 6S 5/12/2009 39 <100 <0.5 1.6 0.001 505 <1 27 4.6 MW-6S 11/2/2009 32.9 <50 <1 1.5 <0.001 306 <1 21.1 4.6 MW-6S 5/25/2010 32.9 <50 <1 <1 0.006 1270 <1 228 6.58 MW-6S 3/7/2011 36 <50 <1 <5 <0.005 <1 100 <0.2 7 MW-6S 7/5/2011 40 <50 <1 <5 <0.005 139 <1 97 <0.2 7 MW-6S 11/2/2011 36 <50 <1 <5 <0.005 56 <1 1 59 MW-6S 3/7/2012 39 <50 <1 <5 <0.005 185 <1 80 MW-6S 7/3/2012 39 <50 <1 <5 <0.005 137 <1 1 114 MW-6S 11/7/2012 40 <50 <1 <5 <0.005 51 <1 60 MW-6S 3/6/2013 39 <50 <1 <5 <0.005 142 <1 72 MW-6S 7/8/2013 41 <50 <1 <5 <0.005 201 <1 135 MW-6S 11/4/2013 39 <50 <1 <5 <0.005 247 <1 73 MW-6S 3/3/2014 41 <50 <1 <5 <0.005 37 <1 73 <0.2 7 <0.2 6 <0.2 8 <0.2 7 <0.2 7 <0.2 7 <0.2 7 <0.2 7 MW-6S MW-6S 7/1/2014 11/3/2014 38 37 <50 <50 <1 <1 <5 <5 <0.005 70 <0.005 <1 <1 43 35 <0.2 <0.2 6 7 MW-6S 3/4/2015 41 <50 <1 <5 <0.005 <1 29 <0.2 7 MW-6S 7/6/2015 47 <50 <1 <5 <0.005 55 <1 35 <0.2 6 MW-6S 11/3/2015 42 <50 <1 <5 <0.005 65 <1 41 <0.2 7 MW-6S 3/1/2016 52 <50 <1 <5 <0.005 <1 <0.2 9 MW-6D 11/14/2006 40 <100 <0.5 2.35 0.005 0 -- 3.24 MW-61) 5/15/2007 36 <100 <0.5 3 0.004 247 <2 15 2 MW-6D 11/20/2007 44 <60 <0.5 2.33 <0.002 37 <2 <5 <2 MW-61) 5/21/2008 45 <100 <0.5 1.58 <0.002 10 <2 <5 <2 MW-61) 11/24/2008 51 <100 <0.5 1.74 <0.002 10 <2 <5 <2 MW-61) 5/12/2009 60 <100 <0.5 1.1 <0.001 <10 <1 <5 <1 MW-61) 11/2/2009 57 <50 <1 1.4 <0.001 <10 <1 <5 <1 MW-61) 5/25/2010 60.7 <50 <1 1.1 <0.001 <10 <1 <5 -- <1 MW-61) 3/7/2011 63 <50 <1 <5 <0.005 31 <1 <5 <0.2 <5 MW-61) 7/5/2011 64 <50 <1 <5 <0.005 <10 <1 <5 <0.2 <5 MW-61) 11/2/2011 62 <50 <1 <5 <0.005 <10 <1 <5 <0.2 <5 MW-61) 3/7/2012 65 <50 <1 <5 <0.005 26 <1 <5 <0.2 <5 MW-61) 7/3/2012 70 <50 <1 <5 <0.005 18 <1 <5 <0.2 <5 MW-6D 11/7/2012 70 <50 <1 <5 <0.005 25 <1 <5 <0.2 <5 MW-61) 3/6/2013 73 <50 <1 <5 <0.005 62 <1 <5 <0.2 <5 MW-6D 7/8/2013 84 <50 <1 <5 <0.005 127 <1 <5 <0.2 <5 Buck Steam Station Page 8 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 700 700 2 10 1 300 15 50 0.2 100 Units: µg/L µg/L µg/L µg/L mg/L µg/L µg/L µg/L µg/L µg/L Well ID Sample Date Barium Boron Cadmium Chromium Copper MW-61) 11/4/2013 81 <50 <1 <5 <0.005 55 <1 <5 <0.2 <5 MW-61) 3/3/2014 83 <50 <1 <5 <0.005 47 <1 <5 <0.2 <5 MW-61) 7/1/2014 86 <50 <1 <5 <0.005 78 <1 <5 <0.2 <5 MW-61) 11/3/2014 76 <50 <1 <5 <0.005 25 <1 <5 <0.2 <5 MW-61) 3/4/2015 77 <50 <1 <5 <0.005 33 <1 <5 <0.2 <5 MW-61) 7/6/2015 86 <50 <1 <5 <0.005 <1 7 <0.2 <5 MW-61) 11/3/2015 77 <50 <1 <5 <0.005 14 <1 <5 <0.2 <5 MW-61) 3/1/2016 92 <50 <1 <5 <0.005 <1 16 <0.2 <5 MW-75 3/8/2011 23 <50 <1 6 <0.005 67 <1 <0.2 6 MW-7S 7/5/2011 23 <50 <1 8 <0.005 199 <1 36 <0.2 7 MW-7S 11/2/2011 24 <50 <1 6 <0.005 89 <1 <0.2 7 MW-7S 3/7/2012 21 <50 <1 8 <0.005 41 <1 30 <0.2 5 MW-7S 7/3/2012 22 <50 <1 8 <0.005 47 <1 35 <0.2 6 MW-7S 11/7/2012 25 <50 <1 6 <0.005 38 <1 <0.2 7 MW-7S 3/6/2013 20 <50 <1 9 <0.005 14 <1 30 <0.2 <5 MW-7S 7/8/2013 24 <50 <1 8 <0.005 68 <1 21 <0.2 5 MW-75 11/4/2013 23 <50 <1 9 <0.005 76 <1 20 <0.2 5 MW-7S 3/3/2014 24 <50 <1 8 <0.005 77 <1 <0.2 6 MW-7S 7/1/2014 27 <50 <1 7 <0.005 69 <1 33 <0.2 6 MW-7S 11/3/2014 25 <50 <1 9 <0.005 59 <1 14 <0.2 5 MW-7S 3/4/2015 24 <50 <1 6 <0.005 47 <1 18 <0.2 5 MW-7S 7/6/2015 25 <50 <1 <1.005 121 <1 12 <0.2 7 MW-7S 11/3/2015 33 <50 <1 8 <0.005 79 <1 24 <0.2 7 MW-7S 3/1/2016 25 <50 <1 9 <0.005 86 <1 150 <0.2 5 MW-71) 3/8/2011 12 <50 <1 <5 <0.005 265 <1 98 <0.2 <5 MW-7D 7/5/2011 15 <50 <1 <5 <0.005 <1 129 <0.2 <5 MW-71) 11/2/2011 13 <50 <1 5 <0.005 274 <1 45 <0.2 <5 MW-7D 3/7/2012 14 <50 <1 <5 <0.005 <1 87 <0.2 <5 MW-71) 7/3/2012 13 <50 <1 <5 <0.005 234 <1 41 <0.2 <5 MW-7D 11/7/2012 19 <50 <1 5 <0.005 <1 19 <0.2 <5 MW-71) 3/6/2013 10 <50 <1 <5 <0.005 218 <1 19 <0.2 <5 MW-7D 7/8/2013 14 <50 <1 <5 <0.005 216 <1 43 <0.2 <5 MW-71) 11/4/2013 13 <50 <1 <5 <0.005 96 <1 11 <0.2 <5 MW-7D 3/3/2014 14 <50 <1 <5 <0.005 151 <1 21 <0.2 <5 MW-71) 7/1/2014 13 <50 <1 <5 <0.005 59 <1 18 <0.2 <5 MW-71) 11/3/2014 14 <50 <1 <5 <0.005 83 <1 10 <0.2 <5 MW-71) 3/4/2015 9 <50 <1 <5 <0.005 354 <1 9 <0.2 <5 MW-71) 7/6/2015 19 <50 <1 < 1.005 hill, 635 <1 <0.2 <5 MW-71) 11/3/2015 15 <50 <1 6 <0.005 394 A <1 22 <0.2 <5 MW-71) 3/1/2016 15 <50 <1 <5 <0.005 199 <1 10 <0.2 <5 MW-8S 3/7/2011 37 <50 <1 <5 <0.005 559 <1 <0.2 <5 MW-8S 7/5/2011 29 <50 <1 <5 <0.005 1360 AVE <1 <0.2 <5 MW-8S 11/2/2011 21 <50 <1 <5 <0.005 84 <1 22 <0.2 <5 MW-8S 3/7/2012 53 <50 <1 <5 <0.005 2000 111111F <1 246 <0.2 6 MW-8S 7/3/2012 23 <50 <1 <5 <0.005 282 <1 j6 <0.2 <5 MW-8S 11/7/2012 21 <50 <1 <5 <0.005 75 <1 38 <0.2 <5 MW-8S 3/6/2013 29 <50 <1 <5 <0.005 849 <1 62 <0.2 <5 MW-8S 7/8/2013 41 <50 <1 <5 0.007 4730 <1 152 <0.2 7 MW-8S 11/4/2013 50 <50 <1 6 0.011 7610 <1 127 <0.2 10 MW-8S 3/3/2014 44 <50 <1 <5 0.009 6550 <1 225 <0.2 9 MW-8S 7/1/2014 21 <50 <1 <5 <0.005 679 _ <1 27 <0.2 <5 MW-8S 11/3/2014 20 <50 <1 <5 <0.005 739 <1 88 <0.2 <5 MW-85 3/4/2015 30 <50 <1 <5 <0.005 378 <1 130 qjE<0.2 <5 MW-8S 7/6/2015 31 <50 <1 <5 <0.005 198 <1 11 <0.2 <5 MW-8S 11/3/2015 22 <50 <1 <5 <0.005 619 <1 JIM<0.2 <5 MW-8S 3/2/2016 31 <50 <1 <5 <0.005 2450 <1 47 <0.2 <5 Buck Steam Station Page 9 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells Well ID MW-81) MW-81) NCAC 2L Standard: Units: Sample Date 3/7/2011 7/5/2011 700 µg/L Barium 19 18 700 µg/L Boron <50 <50 2 µg/L Cadmium <1 <1 10 µg/L Chromium <5 <5 1 mg/L Copper <0.005 <0.005 300 µg/L Iron 147 15 µg/L Lead <1 <1 Manganese 50 µg/L 35 13 0.2 µg/L Thallium <0.2 <0.2 100 µg/L Nickel <5 <5 MW-81) 11/2/2011 17 <50 <1 <5 <0.005 88 <1 7 <0.2 <5 MW-81) 3/7/2012 16 <50 <1 <5 <0.005 129 <1 6 <0.2 <5 MW-81) 7/3/2012 17 <50 <1 <5 <0.005 64 <1 <5 <0.2 <5 MW-81) 11/7/2012 17 <50 <1 <5 <0.005 111 <1 <5 <0.2 <5 MW-81) 3/6/2013 16 <50 <1 <5 <0.005 157 <1 <5 <0.2 <5 MW-81) 7/8/2013 18 <50 <1 <5 <0.005 <1 5 <0.2 <5 MW-81) 11/4/2013 17 <50 <1 <5 <0.005 224 <1 <5 <0.2 <5 MW-81) 3/3/2014 19 <50 <1 <5 <0.005 <1 6 <0.2 <5 MW-81) 7/1/2014 17 <50 <1 <5 <0.005 87 <1 <5 <0.2 <5 MW-81) 11/3/2014 17 <50 <1 <5 <0.005 214 <1 <5 <0.2 <5 MW-81) 3/4/2015 18 <50 <1 <5 <0.005 123 <1 <5 <0.2 <5 MW-81) MW-81) MW-81) MW-9S MW-9S MW-9S MW-9S MW-9S 7/6/2015 11/3/2015 3/2/2016 3/7/2011 7/5/2011 11/2/2011 3/7/2012 7/3/2012 20 18 17 31 29 26 22 28 <50 <50 <50 <50 <50 <50 <50 <50 <1 <1 <1 <1 <1 <1 <1 <1 <5 <5 <5 <5 <5 <5 <5 <5 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 279 227 70 190 <1 <1 <1 <1 <1 <1 <1 <1 1 7 6 <5 63 88 55 45 45 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <5 <5 <5 <5 <5 <5 <5 <5 MW-9S 11/7/2012 29 <50 <1 <5 <0.005 195 <1 38 <0.2 <5 MW-9S 3/7/2013 24 <50 <1 <5 <0.005 75 <1 22 <0.2 <5 MW-9S 7/9/2013 28 <50 <1 <5 <0.005 26 <1 27 <0.2 <5 MW-9S 11/5/2013 30 <50 <1 <5 <0.005 147 <1 22 <0.2 <5 MW-9S 3/4/2014 33 <50 <1 <5 <0.005 <1 29 <0.2 <5 MW-9S 7/1/2014 30 <50 <1 <5 <0.005 24 <1 9 <0.2 <5 MW-9S 11/3/2014 34 <50 <1 <5 <0.005 <1 18 <0.2 <5 MW-9S 3/4/2015 33 <50 <1 <0.005 228 <1 16 <0.2 5 MW-9S 7/6/2015 38 <50 <1 <5 <0.005 <1 37 <0.2 <5 MW-9S 11/3/2015 41 <50 <1 <5 <0.005 222 <1 20 <0.2 <5 MW-9S 3/1/2016 38 <50 <1 <5 <0.005 164 <1 12 <0.2 <5 MW-91) 3/7/2011 25 <50 <1 <5 <0.005 <1 18 <0.2 <5 MW-91) 7/5/2011 20 <50 <1 <5 <0.005 52 <1 <5 <0.2 <5 MW-91) 11/2/2011 20 <50 <1 <5 <0.005 41 <1 <5 <0.2 <5 MW-91) 3/7/2012 20 <50 <1 <5 <0.005 79 <1 <5 <0.2 <5 MW-91) 7/3/2012 28 <50 <1 <5 <0.005 46 <1 <5 <0.2 <5 MW-91) 11/7/2012 22 <50 <1 <5 <0.005 103 <1 5 <0.2 <5 MW-91) 3/7/2013 19 <50 <1 <5 <0.005 10 <1 <5 <0.2 <5 MW-91) 7/9/2013 21 <50 <1 <5 <0.005 37 <1 <5 <0.2 <5 MW-91) 11/5/2013 22 <50 <1 <5 <0.005 91 <1 <5 <0.2 <5 MW-91) 3/4/2014 24 <50 <1 <5 <0.005 120 <1 <5 <0.2 <5 MW-91) 7/1/2014 23 <50 <1 <5 <0.005 35 <1 <5 <0.2 <5 MW-91) 11/3/2014 24 <50 <1 <5 <0.005 14 <1 <5 <0.2 <5 MW-91) 3/4/2015 25 <50 <1 <5 0.005 20 <1 <5 <0.2 <5 MW-91) 7/6/2015 28 <50 <1 <5 <0.005 80 <1 <5 <0.2 <5 MW-91) MW-91) MW-10D MW-10D MW-10D MW-10D MW-10D MW-10D MW-10D MW-10D 11/3/2015 3/1/2016 3/8/2011 7/5/2011 11/2/2011 3/7/2012 7/3/2012 11/7/2012 3/6/2013 7/8/2013 26 30 52 50 45 42 43 46 40 40 <50 <50 <50 <50 <50 <50 <50 <50 <50 <50 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 13 137 279 193 119 104 136 188 110 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <5 <5 1130 944 734 634 539 392 310 272 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 Buck Steam Station Page 10 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 700 700 2 10 1 300 15 50 0.2 100 Units: µg/L µg/L µg/L µg/L mg/L µg/L µg/L µg/L µg/L µg/L Well ID Sample Date Barium Boron Cadmium Chromium Copper Iron Lead Mangan Thallium Nickel MW-10D 11/5/2013 39 <50 <1 <5 <0.005 61 <1 159 <0.2 <5 MW-10D 3/4/2014 47 <50 <1 <5 <0.005 <1 228 <0.2 <5 MW-10D 7/1/2014 36 <50 <1 <5 <0.005 56 <1 110 <0.2 <5 MW-10D 11/3/2014 33 <50 <1 <5 <0.005 98 <1 74 <0.2 <5 MW-10D 3/4/2015 36 <50 <1 <5 <0.005 121 <1 70 <0.2 <5 MW-10D 7/10/2015 41 <50 <1 <5 <0.005 <1 155 <0.2 <5 MW-10D 11/3/2015 32 <50 <1 <5 <0.005 197 <1 62 <0.2 <5 MW-10D 3/2/2016 31 <50 <1 <5 <0.005 94 <1 34 <0.2 <5 MW-11S 3/7/2011 13 440 <1 <5 <0.005 <1 242 <0.2 <5 MW-11S 7/5/2011 8 472 <1 <5 <0.005 218 <1 153 <0.2 <5 MW-11S 11/2/2011 8 481 <1 <5 <0.005 108 <1 120 <0.2 <5 MW-11S 3/7/2012 7 438 <1 <5 <0.005 96 <1 136 <0.2 <5 MW-11S 7/3/2012 9 442 <1 <5 <0.005 0 <1 151 <0.2 <5 MW-11S 11/7/2012 7 453 <1 <5 <0.005 119 <1 126 <0.2 <5 MW-11S 3/7/2013 7 416 <1 <5 <0.005 129 <1 106 <0.2 <5 MW-11S 7/9/2013 8 453 <1 <5 <0.005 L 316 <1 111 <0.2 <5 MW-11S 11/5/2013 8 446 <1 <5 <0.005 375 <1 139 <0.2 <5 MW-11S 3/4/2014 13 440 <1 <5 <0.005 1150 <1 132 <0.2 <5 MW-11S 7/1/2014 7 446 <1 <5 <0.005 63 <1 129 <0.2 <5 MW-11S 11/3/2014 10 425 <1 <5 <0.005 L 617 <1 119 <0.2 <5 MW-11S 3/4/2015 9 416 <1 <5 <0.005 315 <1 116 <0.2 <5 MW-11S 7/6/2015 11 444 <1 <5 <0.005 425<1 310 <0.2 <5 MW-11S 11/3/2015 11 467 <1 <5 <0.005 230 <1 224 <0.2 <5 MW-11S 3/2/2016 10 435 <1 <5 <0.005 53 <1 231 <0.2 <5 MW-11D 3/7/2011 32 1190 <1 <5 <0.005 318 <1 21 <0.2 <5 MW-11D 7/5/2011 45 1290 <1 <5 <0.005 806 1.94 35 <0.2 <5 MW-11D 11/2/2011 48 1260 <1 <5 <0.005 968 2.62 <0.2 <5 MW-11D 3/7/2012 61 1160 <1 <5 <0.005 L 1720 5.1 69 <0.2 <5 MW-11D 7/3/2012 47 1240 A <1 <5 <0.005 1260 2.82 41 <0.2 <5 MW-11D 11/7/2012 52 1220 <1 <5 <0.005 PW 1610 4.3 56 <0.2 <5 MW-11D 3/7/2013 78 1130 <1 <5 <0.005 3230 8.42 122 1 <0.2 <5 MW-11D 7/9/2013 89 1250 <1 <5 <0.005 3810 6.51 81 J <0.2 <5 MW-11D 11/5/2013 59 r 1270 <1 <5 <0.005 2150 4.3 Aw Old <0.2 <5 MW-11D 3/4/2014 51 1240 <1 <5 <0.005 1710 2.57 41 <0.2 <5 MW-11D 7/1/2014 166 1280 <1 <5 0.009 7340 12.5 <0.2 8 MW-11D 11/3/2014 46 1250 <1 <5 <0.005 f 1130 1.77 37 <0.2 <5 MW-11D 3/4/2015 42 r 1170 <1 <5 0.005 806 1.42 26 <0.2 <5 MW-11D 7/6/2015 34 1320 <1 <5 <0.005 PW 317 <1 17 <0.2 <5 MW-11D 11/3/2015 33 1140 <1 <5 <0.005 91 <1 12 <0.2 <5 MW-11D 3/2/2016 28 1160 <1 <5 <0.005 74 <1 9 <0.2 <5 MW-12S 3/8/2011 25 <50 <1 <0.005 <1 444 <0.2 <5 MW-12S 7/5/2011 21 <50 <1 <0.005 246 <1 239 <0.2 <5 MW-12S 11/2/2011 19 <50 <1 <0.005 119 <1 316 <0.2 <5 MW-12S 3/7/2012 17 <50 <1 <5 <0.005 196 <1 122 <0.2 <5 MW-12S 7/3/2012 17 <50 <1 <5 <0.005 157 <1 137 <0.2 <5 MW-12S 11/7/2012 17 <50 <1 <5 <0.005 117 <1 140 <0.2 <5 MW-12S 3/7/2013 17 <50 <1 <5 <0.005 259 <1 52 <0.2 <5 MW-12S 7/9/2013 18 <50 <1 <5 <0.005 r7 571 <1 35 <0.2 <5 MW-12S 11/4/2013 19 <50 <1 <5 <0.005 11 721 <1 68 <0.2 <5 MW-12S 3/4/2014 16 <50 <1 <5 <0.005 329 <1 53 <0.2 <5 MW-12S 7/1/2014 16 <50 <1 <5 <0.005 236 <1 79 <0.2 <5 MW-12S 11/3/2014 20 <50 <1 <5 <0.005 ' 1010 <1 69 <0.2 <5 MW-12S 3/4/2015 17 <50 <1 <5 <0.005 ' 439 <1 41 <0.2 <5 MW-12S 7/6/2015 25 <50 <1 <5 <0.005 ' 2640 <1 89 <0.2 <5 MW-12S 11/3/2015 19 <50 <1 <5 <0.005 1020 <1 61 <0.2 <5 MW-12S 3/1/2016 17 <50 <1 <5 <0.005 476 <1 20 <0.2 <5 Buck Steam Station Page 11 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells Well ID MW-12D MW-12D MW-12D MW-12D MW-12D NCAC 2L Standard: Units: Sample Date� 3/8/2011 7/5/2011 11/2/2011 3/7/2012 7/3/2012 700 µg/L 74 55 46 28 20 700 µg/L <50 <50 <50 <50 <50 2 µg/L <1 <1 <1 <1 <1 10 µg/L <5 <5 <5 <5 <5 1 mg/L <0.005 <0.00577F <0.005 <0.005 <0.005 L 300 µg/L 1070 871 994 530 281 15 µg/L 3.21 2.71 2.03 1.5 <1 50 33 38 19 12 02 <0.2 <0.2 <0.2 <0.2 <0.2 100 <5 <5 <5 <5 <5 MW-12D 11/7/2012 19 <50 <1 <5 <0.005 203 <1 10 <0.2 <5 MW-12D 3/7/2013 14 <50 <1 <5 <0.005 130 <1 7 <0.2 <5 MW-12D 7/9/2013 26 <50 <1 <5 <0.005 201 <1 7 <0.2 <5 MW-12D 11/4/2013 16 <50 <1 <5 <0.005 94 <1 <5 <0.2 <5 MW-12D 3/4/2014 31 <50 <1 <5 <0.005 281 <1 7 <0.2 <5 MW-12D 7/1/2014 16 <50 <1 <5 <0.005 83 <1 <5 <0.2 <5 MW-12D 11/3/2014 17 <50 <1 <5 <0.005 96 <1 <5 <0.2 <5 MW-12D 3/4/2015 26 <50 <1 <5 0.017 106 <1 <5 <0.2 <5 MW-12D 7/6/2015 20 <50 <1 <5 <0.005 <1 8 <0.2 <5 MW-12D 11/3/2015 19 <50 <1 <5 <0.005 254 <1 6 <0.2 <5 MW-12D 3/1/2016 15 <50 <1 <5 <0.005 98 <1 <5 <0.2 <5 MW-13D 3/8/2011 44 <50 <1 <5 <0.005 179 <1 15 <0.2 <5 MW-13D 7/5/2011 48 <50 <1 <5 <0.005 257 <1 6 <0.2 <5 MW-13D 11/2/2011 42 <50 <1 <5 <0.005 64 <1 <5 <0.2 <5 MW-13D 3/7/2012 41 <50 <1 <5 <0.005 263 <1 <5 <0.2 <5 MW-13D 7/3/2012 45 <50 <1 <5 <0.005 47 <1 <5 <0.2 <5 MW-13D 11/7/2012 43 <50 <1 <5 <0.005 42 <1 <5 <0.2 <5 MW-13D MW-13D MW-13D MW-13D MW-13D MW-13D MW-13D 3/6/2013 7/8/2013 11/4/2013 3/3/2014 7/1/2014 11/3/2014 3/4/2015 40 46 45 48 50 45 43 <50 <50 <50 <50 <50 <50 <50 <1 <1 <1 <1 <1 <1 <1 <5 5 5 7 5 <5 <5 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 228 680 344 1260 134 84 111 <1 <1 <1 <1 <1 <1 <1 <5 6 <5 8 <5 <5 <5 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <5 <5 <5 <5 <5 <5 <5 MW-13D 7/6/2015 50 <50 <1 7 <0.005 <1 <5 <0.2 <5 MW-13D 11/3/2015 45 <50 <1 <5 <0.005 <1 <5 <0.2 <5 MW-13D 3/1/2016 43 <50 <1 5 <0.005 85 <1 <5 <0.2 <5 Notes: 1. °C indicates temperature measured in degrees celsius 2. mV indicates oxidation/reduction potential measured in millivolts 3. µO/cm indicates specific conductivity measured in micromhos per centimeter 4. mg/L indicates concentrations measured in milligrams per liter 5. µg/L indicates concentrations measured in micrograms per liter 6. SU indicates pH values measured in standard units 7. NTU indicates turbidity values measured in Nephalometric Turbidity Units 8. Parameters are compared to standards found in 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina 9. 2L Standards are established as part of 15A NCAC 02L .0202 10. Interim Maximum Allowable Concentrations (IMACs) can be found in Appendix #1 of 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina Buck Steam Station Page 12 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells Well ID MW-IS NCAC 2L Standard: Units: Sample Date 11/15/2006 1 1 mg/L µg/L Zinc Antimony* 0.019 - 20 µg/L Selenium <2 1 µg/L Mercury <0.2 NS NTU Turbidity (Field) 95.8 MW-1S 5/15/2007 0.016 <2 <0.1 326 MW-IS 11/19/2007 0.008 - <2 <0.1 146 MW-1S 5/21/2008 0.013 <2 <0.05 236 MW-IS 11/24/2008 0.007 - <2 <0.05 104 MW-1S 5/12/2009 0.008 <1 <0.05 50.5 MW-IS 11/2/2009 <0.005 - <1 <0.05 45.4 MW-1S 5/25/2010 <0.005 <1 <0.05 100 MW-1D 11/15/2006 <0.005 - <2 <0.2 17.8 MW-1D 5/15/2007 0.014 <2 <0.1 1.93 MW-1D 11/19/2007 <0.005 - <2 <0.1 3.75 MW-1D 5/21/2008 <0.005 - <2 <0.05 1.61 MW-1D 11/24/2008 <0.005 - <2 <0.05 1.8 MW-1D 5/12/2009 <0.005 - <1 <0.05 0.89 MW-1D 11/2/2009 <0.005 -- <1 <0.05 2.98 MW-1D 5/25/2010 <0.005 - <1 <0.05 1.66 MW-2S 11/15/2006 0.023 -- <2 <0.2 3.83 MW-2S 5/16/2007 0.015 - <2 <0.1 7.44 MW-2S 11/19/2007 0.013 -- <2 <0.1 22.2 MW-2S 5/21/2008 0.016 - <2 <0.05 6.23 MW-2D 11/15/2006 0.038 -- <2 <0.2 887 MW-2D 5/16/2007 0.006 - <2 <0.1 105 MW-2D 11/19/2007 <0.005 - <2 <0.1 4.23 MW-2D 5/21/2008 <0.005 <2 <0.05 3.92 MW-3S 11/15/2006 <0.005 -- <2 <0.2 13.9 MW-3S 5/15/2007 <0.005 <2 <0.1 6.59 MW-3S 11/19/2007 <0.005 -- <2 <0.1 7.7 MW-3S 5/21/2008 <0.005 <2 <0.05 21.4 MW-3S 11/24/2008 <0.005 -- <2 <0.05 24 MW-3S 5/12/2009 <0.005 <1 <0.05 20.6 MW-3S 11/2/2009 <0.005 -- <1 <0.05 7.54 MW-3S 5/25/2010 <0.005 - <1 <0.05 8.59 MW-3D 11/15/2006 0.006 - <2 <0.2 12.7 MW-3D 5/15/2007 <0.005 <2 <0.1 2.49 MW-3D 11/19/2007 <0.005 - <2 <0.1 1.82 MW-3D 5/21/2008 <0.005 <2 <0.05 4.13 MW-3D 11/24/2008 <0.005 - <2 <0.05 1.16 MW-3D 5/12/2009 <0.005 <1 <0.05 1.51 MW-3D 11/2/2009 <0.005 - <1 <0.05 2.68 MW-3D 5/25/2010 <0.005 <1 <0.05 1.05 MW-4S 11/14/2006 <0.005 - <2 <0.2 16.4 MW-4S 5/15/2007 <0.005 <2 <0.1 39.8 MW-4S 11/19/2007 <0.005 - <2 <0.1 18.4 MW-4S 5/21/2008 0.019 - <2 <0.05 140 MW-4S 11/24/2008 <0.005 - <2 <0.05 9.76 MW-4S 5/12/2009 0.03 - <1 <0.05 158 MW-4S 11/2/2009 <0.005 - <1 <0.05 74.3 MW-4S 5/25/2010 <0.005 - <1 <0.05 14.7 MW-4D 11/14/2006 <0.005 -- <2 <0.2 10.9 MW-4D 5/15/2007 <0.005 - <2 <0.1 0.52 MW-4D 11/19/2007 <0.005 -- <2 <0.1 1.16 MW-4D 5/21/2008 <0.005 - <2 0.125 6.22 MW-4D 11/24/2008 <0.005 -- <2 <0.05 1.08 MW-4D 5/12/2009 <0.005 - <1 <0.05 2.18 MW-41) 11/2/2009 <0.005 -- <1 <0.05 2.78 MW-4D 5/25/2010 <0.005 - <1 <0.05 0.81 Buck Steam Station Page 13 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells Well ID Sample Date Zinc Antimony* Selenium Mercury Turbidity (Field) MW-5S 5/16/2007 <0.005 - <2 <0.1 7.99 MW-5S 11/20/2007 0.007 -- <2 <0.1 18.1 MW-5S 5/21/2008 <0.005 - <2 0.054 10.9 MW-5S 11/24/2008 <0.005 -- <2 <0.05 4.18 MW-5S 5/12/2009 0.006 - <1 <0.05 8.24 MW-5S 11/2/2009 <0.005 -- <1 <0.05 19 MW-5S 5/25/2010 <0.005 - <1 <0.05 7.8 MW-5D 11/15/2006 <0.005 - <2 <0.2 7.75 MW-51) 5/16/2007 <0.005 <2 <0.1 0.64 MW-51) 11/20/2007 <0.005 - <2 <0.1 1.24 MW-5D 5/21/2008 <0.005 - <2 <0.05 5.54 MW-51) 11/24/2008 <0.005 - <2 <0.05 0.69 MW-5D 5/12/2009 <0.005 - <1 <0.05 1.97 MW-51) 11/2/2009 <0.005 - <1 <0.05 3.44 MW-5D 5/25/2010 <0.005 - <1 <0.05 1.56 MW-6S 11/14/2006 0.023 -- <2 <0.2 71.8 MW-6S 5/15/2007 0.006 - <2 <0.1 4.79 MW-6S 11/20/2007 0.009 -- <2 <0.1 37.8 MW-6S 5/21/2008 0.012 - <2 <0.05 64.9 MW-6S 11/24/2008 0.006 -- <2 <0.05 78 MW-6S 5/12/2009 0.007 - <1 <0.05 59.6 MW-6S 11/2/2009 <0.005 -- <1 <0.05 14.5 MW-6S 5/25/2010 0.006 <1 <0.05 11.9 MW-6S 3/7/2011 0.009 <1 <1 <0.05 8.1 MW-6S 7/5/2011 0.007 <1 <1 <0.05 7.5 MW-6S 11/2/2011 0.006 <1 <1 <0.05 4 MW-6S 3/7/2012 0.008 <1 <1 <0.05 1.63 MW-6S 7/3/2012 0.007 <1 <1 <0.05 5.21 MW-6S 11/7/2012 0.007 <1 <1 <0.05 4.26 MW-6S 3/6/2013 0.008 <1 <1 <0.05 2.04 MW-6S 7/8/2013 0.01 <1 <1 <0.05 4.24 MW-6S 11/4/2013 <0.005 <1 <1 <0.05 3.32 MW-6S 3/3/2014 0.014 <1 <1 <0.05 1.36 MW-6S 7/1/2014 <0.005 <1 <1 <0.05 5.29 MW-6S 11/3/2014 0.011 <1 <1 <0.05 8.43 MW-6S 3/4/2015 0.01 <1 <1 <0.05 6.64 MW-6S 7/6/2015 0.008 <1 <1 <0.05 0.82 MW-6S 11/3/2015 0.007 <1 <1 <0.05 2.32 MW-6S 3/1/2016 0.007 <1 <0.05 2.83 MW-6D 11/14/2006 0.017 - <2 <0.2 24.5 MW-6D 5/15/2007 0.006 <2 <0.1 8.15 MW-6D 11/20/2007 <0.005 -- <2 <0.1 1.39 MW-6D 5/21/2008 <0.005 <2 <0.05 1.08 MW-61) 11/24/2008 <0.005 -- <2 <0.05 0.63 MW-6D 5/12/2009 <0.005 <1 <0.05 0.32 MW-61) 11/2/2009 <0.005 -- <1 <0.05 2.58 MW-6D 5/25/2010 <0.005 - <1 <0.05 0.67 MW-61) 3/7/2011 <0.005 <1 <1 <0.05 2 MW-6D 7/5/2011 <0.005 <1 <1 <0.05 0.9 MW-61) 11/2/2011 <0.005 <1 <1 <0.05 0.5 MW-6D 3/7/2012 <0.005 <1 <1 <0.05 0.94 MW-61) 7/3/2012 <0.005 <1 <1 <0.05 0.5 MW-6D 11/7/2012 <0.005 <1 <1 <0.05 0.54 MW-61) 3/6/2013 <0.005 <1 <1 <0.05 2.1 MW-6D 7/8/2013 <0.005 <1 <1 <0.05 1.98 Buck Steam Station Page 14 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 1 1 20 1 NS Units: mg/L µg/L µg/L µg/L NTU SampleWell ID Turbidity MW-6D 3/3/2014 0.007 <1 <1 <0.05 1.35 MW-6D 7/1/2014 <0.005 <1 <1 <0.05 2.35 MW-6D 11/3/2014 <0.005 <1 <1 <0.05 1.24 MW-6D 3/4/2015 <0.005 <1 <1 <0.05 1.66 MW-6D 7/6/2015 <0.005 <1 <1 <0.05 7.31 MW-6D 11/3/2015 <0.005 <1 <1 <0.05 1.48 MW-6D 3/1/2016 <0.005 <1 <0.05 9.92 MW-75 3/8/2011 <0.005 <1 <1 <0.05 4.8 MW-7S 7/5/2011 <0.005 <1 <1 <0.05 8.3 MW-7S 11/2/2011 <0.005 <1 <1 <0.05 3.6 MW-7S 3/7/2012 <0.005 <1 <1 <0.05 2.12 MW-75 7/3/2012 <0.005 <1 <1 <0.05 1.46 MW-7S 11/7/2012 <0.005 <1 <1 <0.05 1.04 MW-75 3/6/2013 <0.005 <1 <1 <0.05 1.99 MW-7S 7/8/2013 <0.005 <1 <1 <0.05 1.14 MW-75 11/4/2013 <0.005 <1 <1 <0.05 2.43 MW-7S 3/3/2014 <0.005 <1 <1 <0.05 1.37 MW-7S 7/1/2014 <0.005 <1 <1 <0.05 1.99 MW-7S 11/3/2014 0.006 <1 <1 <0.05 2.4 MW-7S 3/4/2015 <0.005 <1 <1 <0.05 2.18 MW-7S 7/6/2015 <0.005 <1 <1 <0.05 1.57 MW-7S 11/3/2015 <0.005 <1 <1 <0.05 1.95 MW-7S 3/1/2016 <0.005 <1 <0.05 2.74 MW-7D 3/8/2011 <0.005 <1 <1 <0.05 8.5 MW-7D 7/5/2011 <0.005 <1 <1 <0.05 7 MW-7D 11/2/2011 <0.005 <1 <1 <0.05 9.6 MW-7D 3/7/2012 <0.005 <1 <1 <0.05 9.3 MW-7D 7/3/2012 <0.005 <1 <1 <0.05 9.66 MW-7D 11/7/2012 <0.005 <1 <1 <0.05 14.3 MW-7D 3/6/2013 <0.005 <1 <1 <0.05 7.17 MW-7D 7/8/2013 <0.005 <1 <1 <0.05 4.54 MW-7D 11/4/2013 <0.005 <1 <1 <0.05 3.96 MW-7D 3/3/2014 <0.005 <1 <1 <0.05 3.15 MW-7D 7/1/2014 <0.005 <1 <1 <0.05 3.09 MW-7D 11/3/2014 <0.005 <1 <1 <0.05 3.16 MW-7D 3/4/2015 <0.005 <1 <1 <0.05 8.78 MW-71) 7/6/2015 <0.005 <1 <1 <0.05 9.93 MW-7D 11/3/2015 <0.005 <1 <1 <0.05 3.7 MW-71) 3/1/2016 <0.005 <1 <0.05 6.29 MW-8S 3/7/2011 <0.005 <1 <1 <0.05 27.2 MW-8S 7/5/2011 <0.005 <1 <1 <0.05 47.1 MW-8S 11/2/2011 <0.005 <1 <1 <0.05 6.6 MW-8S 3/7/2012 0.007 <1 <1 <0.05 70.3 MW-8S 7/3/2012 <0.005 <1 <1 <0.05 4.48 MW-8S 11/7/2012 <0.005 <1 <1 <0.05 2.04 MW-8S 3/6/2013 0.007 <1 <1 <0.05 15.3 MW-8S 7/8/2013 0.011 <1 <1 <0.05 19.5 MW-8S 11/4/2013 0.009 <1 <1 <0.05 48.2 MW-8S 3/3/2014 0.011 <1 <1 <0.05 86.5 MW-8S 7/1/2014 <0.005 <1 <1 <0.05 16.9 MW-8S 11/3/2014 <0.005 <1 <1 <0.05 11.4 MW-85 3/4/2015 <0.005 <1 <1 <0.05 7.71 MW-8S 7/6/2015 <0.005 <1 <1 <0.05 3.54 MW-8S 11/3/2015 <0.005 <1 <1 <0.05 10.8 MW-8S 3/2/2016 <0.005 <1 <0.05 32.6 Page 15 of 18 Buck Steam Station CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells Well ID Sample Date Zinc Antimony* Selenium Mercury Turbidity (Field) IVIVV-25U .5///LUll GU.UU.� 11. Gl 11U.U.7 11 MW-81) 7/5/2011 <0.005 <1 <1 <0.05 16 MW-8D 11/2/2011 <0.005 <1 <1 <0.05 6.2 MW-8D 3/7/2012 <0.005 <1 <1 <0.05 3.55 MW-8D 7/3/2012 <0.005 <1 <1 <0.05 4.48 MW-81) 11/7/2012 <0.005 <1 <1 <0.05 2.59 MW-8D 3/6/2013 <0.005 <1 <1 <0.05 4.77 MW-8D 7/8/2013 <0.005 <1 <1 <0.05 3.87 MW-8D 11/4/2013 <0.005 <1 <1 <0.05 4.78 MW-81) 3/3/2014 <0.005 <1 <1 <0.05 8.03 MW-81) 7/1/2014 <0.005 <1 <1 <0.05 11 MW-8D 11/3/2014 <0.005 <1 <1 <0.05 4.78 MW-81) 3/4/2015 <0.005 <1 <1 <0.05 4.91 MW-8D 7/6/2015 <0.005 <1 <1 <0.05 5.48 MW-81) 11/3/2015 <0.005 <1 <0.05 6.96 MW-8D 3/2/2016 <0.005 <1 <0.05 4.74 MW-9S 3/7/2011 <0.005 <1 <1 <0.05 30.6 MW-9S 7/5/2011 <0.005 <1 <1 <0.05 9.9 MW-9S 11/2/2011 <0.005 <1 <1 <0.05 9.3 MW-9S 3/7/2012 <0.005 <1 <1 <0.05 3.01 MW-9S 7/3/2012 <0.005 <1 <1 <0.05 9.86 MW-9S 11/7/2012 <0.005 <1 <1 <0.05 6.03 MW-9S 3/7/2013 <0.005 <1 <1 <0.05 7.93 MW-9S 7/9/2013 <0.005 <1 <1 <0.05 0.91 MW-9S 11/5/2013 <0.005 <1 <1 <0.05 6.23 MW-9S 3/4/2014 <0.005 <1 <1 <0.05 8.26 MW-9S 7/1/2014 <0.005 <1 <1 <0.05 3.82 MW-9S 11/3/2014 <0.005 <1 <1 <0.05 8.16 MW-9S 3/4/2015 <0.005 <1 <1 <0.05 5.59 MW-9S 7/6/2015 <0.005 <1 <1 <0.05 5.31 MW-9S 11/3/2015 <0.005 <1 <1 <0.05 6.13 MW-9S 3/1/2016 <0.005 <1 <0.05 5.32 MW-91) 3/7/2011 <0.005 <1 <1 <0.05 15 MW-91) 7/5/2011 <0.005 <1 <1 <0.05 2.2 MW-9D 11/2/2011 <0.005 <1 <1 <0.05 2.1 MW-91) 3/7/2012 <0.005 <1 <1 <0.05 3.04 MW-9D 7/3/2012 <0.005 <1 <1 <0.05 1.76 MW-91) 11/7/2012 <0.005 <1 <1 <0.05 3.11 MW-9D 3/7/2013 <0.005 <1 <1 <0.05 1.58 MW-91) 7/9/2013 <0.005 <1 <1 <0.05 1.12 MW-9D 11/5/2013 <0.005 <1 <1 <0.05 4.14 MW-91) 3/4/2014 <0.005 <1 <1 <0.05 2.04 MW-9D 7/1/2014 <0.005 <1 <1 <0.05 2.22 MW-91) 11/3/2014 <0.005 <1 <1 <0.05 1.59 MW-91) 3/4/2015 <0.005 <1 <1 <0.05 1.02 MW-91) 7/6/2015 <0.005 <1 <1 <0.05 1.06 MW-91) 11/3/2015 <0.005 <1 <1 <0.05 1.22 MW-91) 3/1/2016 <0.005 <1 <0.05 4.43 MW-10D 3/8/2011 <0.005 <1 <1 <0.05 9.5 MW-10D 7/5/2011 <0.005 <1 <1 <0.05 1.7 MW-10D 11/2/2011 <0.005 <1 <1 <0.05 1.1 MW-10D 3/7/2012 <0.005 <1 <1 <0.05 1.54 MW-10D 7/3/2012 <0.005 <1 <1 <0.05 0.46 MW-10D 11/7/2012 <0.005 <1 <1 <0.05 1.43 MW-10D 3/6/2013 <0.005 <1 <1 <0.05 1.79 MW-10D 7/8/2013 <0.005 <1 <1 <0.05 0.79 Buck Steam Station Page 16 of 18 CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 1 1 20 1 NS Units: mg/L µg/L µg/L µg/L NTU SampleWell ID Turbidity MW-10D 3/4/2014 <0.005 <1 <1 <0.05 5.96 MW-10D 7/1/2014 <0.005 <1 <1 <0.05 6.84 MW-10D 11/3/2014 <0.005 <1 <1 <0.05 2.6 MW-10D 3/4/2015 <0.005 <1 <1 <0.05 2.73 MW-10D 7/10/2015 0.006 <1 <1 <0.05 9.44 MW-10D 11/3/2015 <0.005 <1 <1 <0.05 3.86 MW-10D 3/2/2016 <0.005 <1 <0.05 4.54 MW-11S 3/7/2011 <0.005 <1 <1 <0.05 22.9 MW-11S 7/5/2011 <0.005 <1 <1 <0.05 14.3 MW-11S 11/2/2011 <0.005 <1 <1 <0.05 7.2 MW-11S 3/7/2012 <0.005 <1 <1 <0.05 2.59 MW-11S 7/3/2012 <0.005 <1 <1 <0.05 4.89 MW-11S 11/7/2012 <0.005 <1 <1 <0.05 3.09 MW-11S 3/7/2013 <0.005 <1 <1 <0.05 4.83 MW-11S 7/9/2013 <0.005 <1 <1 <0.05 6.05 MW-11S 11/5/2013 <0.005 <1 <1 <0.05 7.76 MW-11S 3/4/2014 <0.005 <1 <1 <0.05 16.2 MW-11S 7/1/2014 <0.005 <1 <1 <0.05 4.9 MW-11S 11/3/2014 0.005 <1 <1 <0.05 9.77 MW-11S 3/4/2015 <0.005 <1 <1 <0.05 7.83 MW-11S 7/6/2015 <0.005 <1 <1 <0.05 8.77 MW-11S 11/3/2015 <0.005 <1 <1 <0.05 4.45 MW-11S 3/2/2016 <0.005 <1 <0.05 1.91 MW-11D 3/7/2011 <0.005 <1 <1 <0.05 12.8 MW-11D 7/5/2011 0.005 <1 <1 <0.05 37.5 MW-11D 11/2/2011 0.006 <1 <1 <0.05 53.3 MW-11D 3/7/2012 0.01 <1 <1 <0.05 76.8 MW-11D 7/3/2012 <0.005 <1 <1 <0.05 56.2 MW-11D 11/7/2012 0.009 <1 <1 <0.05 126 MW-11D 3/7/2013 0.017 <1 <1 <0.05 277 MW-11D 7/9/2013 0.019 <1 <1 <0.05 202 MW-11D 11/5/2013 0.009 <1 <1 <0.05 123 MW-11D 3/4/2014 0.011 <1 <1 <0.05 33.8 MW-11D 7/1/2014 0.028 <1 <1 <0.05 313 MW-11D 11/3/2014 0.007 <1 <1 <0.05 36.3 MW-11D 3/4/2015 0.007 <1 <1 <0.05 27.9 MW-11D 7/6/2015 <0.005 <1 <1 <0.05 6.81 MW-11D 11/3/2015 <0.005 <1 <1 <0.05 2.53 MW-11D 3/2/2016 <0.005 <1 <0.05 2.88 MW-12S 3/8/2011 <0.005 <1 <1 <0.05 13.4 MW-12S 7/5/2011 <0.005 <1 <1 <0.05 9 MW-12S 11/2/2011 <0.005 <1 <1 <0.05 9.5 MW-12S 3/7/2012 <0.005 <1 <1 <0.05 8.01 MW-12S 7/3/2012 <0.005 <1 <1 <0.05 2.5 MW-12S 11/7/2012 <0.005 <1 <1 <0.05 2.56 MW-12S 3/7/2013 <0.005 <1 <1 <0.05 8.14 MW-12S 7/9/2013 <0.005 <1 <1 <0.05 7.76 MW-12S 11/4/2013 <0.005 <1 <1 <0.05 13.2 MW-12S 3/4/2014 <0.005 <1 <1 <0.05 7.11 MW-12S 7/1/2014 <0.005 <1 <1 <0.05 9.75 MW-12S 11/3/2014 0.006 <1 <1 <0.05 13.8 MW-12S 3/4/2015 <0.005 <1 <1 <0.05 12 MW-12S 7/6/2015 0.006 <1 <1 <0.05 35.4 MW-12S 11/3/2015 <0.005 <1 <1 <0.05 16 MW-12S 3/1/2016 <0.005 <1 <0.05 9.18 Page 17 of 18 Buck Steam Station CSA Supplement 2 Table 1-2: Historical Data from NPDES Compliance and Voluntary Wells NCAC 2L Standard: 1 1 20 Units: mg/L µg/L µg/L Well ID Sample Date, Zinc Antimony* SeleniL ,n NS lity WWI MW-12D 7/5/2011 0.005 <1 <1 <0.05 63.2 MW-12D 11/2/2011 0.01 <1 <1 <0.05 68.6 MW-12D 3/7/2012 <0.005 <1 <1 <0.05 23.6 MW-12D 7/3/2012 <0.005 <1 <1 <0.05 9.34 MW-12D 11/7/2012 <0.005 <1 <1 <0.05 6.14 MW-12D 3/7/2013 <0.005 <1 <1 <0.05 5.87 MW-12D 7/9/2013 <0.005 <1 <1 <0.05 4.52 MW-12D 11/4/2013 <0.005 <1 <1 <0.05 3.89 MW-12D 3/4/2014 <0.005 <1 <1 <0.05 7.4 MW-12D 7/1/2014 <0.005 <1 <1 <0.05 5.23 MW-12D 11/3/2014 <0.005 <1 <1 <0.05 3.87 MW-12D 3/4/2015 0.006 <1 <1 <0.05 5.18 MW-12D 7/6/2015 <0.005 <1 <1 <0.05 7.11 MW-12D 11/3/2015 <0.005 <1 <1 <0.05 6.51 MW-12D 3/1/2016 <0.005 <1 <0.05 4.18 MW-13D 3/8/2011 <0.005 <1 <1 <0.05 12.9 MW-13D 7/5/2011 <0.005 <1 <1 <0.05 17.7 MW-13D 11/2/2011 <0.005 <1 <1 <0.05 7.3 MW-13D 3/7/2012 <0.005 <1 <1 <0.05 9.9 MW-13D 7/3/2012 <0.005 <1 <1 <0.05 1.63 MW-13D 11/7/2012 <0.005 <1 <1 <0.05 1.37 MW-13D 3/6/2013 <0.005 <1 <1 <0.05 9.8 MW-13D 7/8/2013 <0.005 <1 <1 <0.05 9.47 MW-13D 11/4/2013 <0.005 <1 <1 <0.05 4.9 MW-13D 3/3/2014 <0.005 <1 <1 <0.05 27.2 MW-13D 7/1/2014 <0.005 <1 <1 <0.05 9.17 MW-13D 11/3/2014 <0.005 <1 <1 <0.05 4.1 MW-13D 3/4/2015 <0.005 <1 <1 <0.05 4.92 MW-13D 7/6/2015 <0.005 <1 <1 <0.05 9.9 MW-13D 11/3/2015 <0.005 <1 <1 <0.05 6.74 MW-13D 3/1/2016 <0.005 <1 <0.05 2.72 Notes: 1. °C indicates temperature measured in degrees celsius 2. mV indicates oxidation/reduction potential measured in millivolts 3. µO/cm indicates specific conductivity measured in micromhos per centimeter 4. mg/L indicates concentrations measured in milligrams per liter 5. µg/L indicates concentrations measured in micrograms per liter 6. SU indicates pH values measured in standard units 7. NTU indicates turbidity values measured in Nephalometric Turbidity Units 8. Parameters are compared to standards found in 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina 9. 2L Standards are established as part of 15A NCAC 02L .0202 10. Interim Maximum Allowable Concentrations (IMACs) can be found in Appendix #1 of 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina Buck Steam Station Page 18 of 18 CSA Supplement 2 Table 1-3: 2L Groundwater Standard Exceedances from NPDES Sampling 2L Standard: Units: 1 µg/L 700 µg/L 300 µg/L 50 µg/L 100 µg/L 6.5 - 8.5 SU Well ID AB-111 Date Range 3/1/2011- 3/3/2016 Antimony 1.1- 2.57 Boron No Exceedances Iron 381- 476 Manganese No Exceedances Nickel No Exceedances . 5.91- 6.5 AB-4S 11/2/2004 - 3/3/2016 1.07 - 2.46 No Exceedances 314 - 3,600 64 - 380 No Exceedances 5.3 - 6.14 AB-41) 11/2/2004 - 3/3/2016 1.04 - 2.54 No Exceedances 750 74 -110 No Exceedances 5.76 - 6.3 AB-9S 3/1/2011- 3/3/2016 1.05 - 2.52 705 - 740 4,470-10,500 9,130-10,200 No Exceedances 5.93 - 6.49 AB-9D 3/1/2011- 3/3/2016 1.07 - 2.19 No Exceedances 356 - 909 95 No Exceedances 6.32 - 6.4 AB-10D 3/1/2011- 3/3/2016 1.05 - 2.58 No Exceedances 333 - 843 373 - 557 No Exceedances 5.74 - 6.31 AB-11S 3/1/2011- 3/3/2016 2.35 No Exceedances 307 -1,060 50 -144 No Exceedances 5.84 - 6.49 AB-11D 3/1/2011- 3/3/2016 1.11- 2.5 No Exceedances 355 - 844 No Exceedances No Exceedances 5.5 - 6.14 AB-12S 3/1/2011- 3/3/2016 1.92 No Exceedances 549 - 2,770 53 -132 No Exceedances 4.71- 5.19 AB-12D 3/1/2011- 3/3/2016 2.56 No Exceedances 307 - 823 No Exceedances No Exceedances 6.09 - 6.48 AB-135 3/1/2011- 3/3/2016 1.05 - 2.49 No Exceedances 324 - 817 55 -165 No Exceedances 5.16 - 5.94 AB-13D 3/1/2011- 3/3/2016 1.24 - 2.45 No Exceedances 391- 3,100 57 - 240 No Exceedances 5.85 - 6.49 AB-14D 3/1/2011- 3/3/2016 2 No Exceedances 301- 8,350 52 - 945 104 - 544 5.16 - 6.17 Notes: 1. mg/L indicates concentrations measured in milligrams per liter 2. µg/L indicates concentrations measured in micrograms per liter 3. SU indicates pH values measured in standard units 4. Parameters are compared to standards found in 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina 2L Standards are established as part of 15A NCAC 02L .0202 5. Interim Maximum Allowable Concentrations (IMACs) can be found in Appendix #1 of 15A NCAC Subchapter 02L Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina Allen Steam Station Page 1 of 1 CSA Supplement 2 Table 2-2. Total Porosity, Secondary (Effective) Porosity/Specific Yield, and Specific Storage for Lower Hydrostratigraphic Units (TZ and BR) Hydrostratigraphic Unit Secondary (Effective) Porosity / Specific Yield (%) Total Porosity (%) Specific Storage (1/ft) Transition Zone (TZ) 5.0 - 10.0 5 - 15 1.0E-06 - 2.1 E-05 Bedrock (BR) - Fractured 2.0 - 5.0 5 - 10 < 1.0E-06 Bedrock (BR) - Dense 0-3 0-5 < 1.0E-06 Notes: 1. Ranges based on published values (Domenico and Mifflin, 1965; Singhal and Gupta, 2010). 2. Effective porosity and specific yield are not synonymous. For practical purposes, they may be estimated as approximately equal in value. 3. Table revised 07/13/2016. Buck Steam Station CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: AB-10D 4/4/2016 N BU-AB-10D AB-10S 4/4/2016 N BU-AB-10S AB-1 D 4/4/2016 N BU-AB-1D AB-2BR 4/4/2016 N BU-AB-2BR AB-2D 4/4/2016 N BU-AB-2D AB-31D 4/4/2016 N BU-AB-3D AB-4BR 4/4/2016 FD BU-FD-AB-4BR AB-4BR 4/4/2016 N BU-AB-4BR AB-4BRU 4/4/2016 N BU-AB-4BRU AB-6BRU 4/4/2016 N BU-AB-6BRU Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 109000 5000 U 5000 U 42100 J 81200 J 5000 U 5000 U TRG Alkalinity, HCO3 N ug/I 108000 9500 26600 5000 U 152000 57400 19900 J 52000 J 138000 154000 TRG Alkalinity, lab N ug/I 108000 9500 26600 122000 152000 57400 61900 J 133000 J 138000 154000 TRG Aluminum D ug/I 100 U 132 100 U 346 100 U 100 U 433 455 100 U 100 U TRG jAluminum T ug/I 60.8 J 630 100 U 257 100 U 100 U 413 J 113 J 100 U 358 TRG Antimony D - ug/I 2.5 U 0.27 J 0.5 U 5 U 0.5 U 0.5 U 5 U 5 U 5 U 5 U TRG Antimony T 1 IMAC ug/I 2.5 U 0.33 J 0.5 U 6 5 U 0.5 U 5 U 4.9 J 5 U 5 U TRG Arsenic D - ug/I 0.75 0.16 0.064 J 0.8 J 1.4 0.24 5.4 5.4 0.79 J 0.46 J TRG Arsenic T 10 02L ug/I 0.42 J+ 0.52 J+ 0.071 J 1.2 1.8 0.22 J+ 5.2 J 3.5 J 0.81 J 0.63 J TRG Barium D - ug/I 41.6 22.5 35.4 16.4 15 64.1 14.7 15.2 16.6 55.7 TRG Barium T 700 02L ug/I 42 22.1 39.3 16.8 16.6 62.5 15.7 J 34.8 J 18.6 69.3 TRG Beryllium D - ug/I 0.5 U 0.022 J 0.1 U 1 U 0.1 U 0.1 U 0.14 J+ 1 U 1 U 1 U TRG Beryllium T 4 IMAC ug/I 0.5 U 0.091 J 0.1 U 0.1 U 1 U 0.1 U 1 U 1 U 1 U 1 U TRG Boron D - ug/I 1760 46.7 J 1440 110 871 50 U 50 U 40.7 J 50 U 50 U TRG Boron T 700 02L ug/I 1880 62.1 1640 95.3 903 50 U 50 UJ 63.6 J 50 U 50 U TRG Cadmium D - ug/I 0.4 U 0.08 U 0.08 U 0.8 U 0.08 U 0.08 U 0.8 U 0.8 U 0.8 U 0.8 U TRG Cadmium T 2 02L ug/I 0.4 U 0.08 U 0.08 U 0.08 U 0.8 U 0.08 U 0.8 U 0.8 U 0.8 U 9.4 TRG Calcium T - ug/I 33200 4080 27800 32600 39600 10900 55500 J 39900 J 42000 39900 TRG Chloride N 250000 02L ug/I 13000 8700 21900 9900 7900 2500 5200 J 8300 J 5900 6100 TRG Chromium D - ug/I 6.4 3.2 0.32 J+ 1.6 J+ 0.28 J+ 0.81 5 U 1.8 J+ 1.8 J+ 1.6 J+ TRG Chromium T 10 02L ug/I 4.4 50.8 0.48 J+ 2.4 5 U 1 J+ 5 U 2.9 J 5 U 109 TRG Chromium 6+ T 0.07 DHHS ug/I 5.5 0.1 0.12 0.26 0.03 U 0.64 0.27 0.032 J 0.011 J 0.034 TRG Cobalt D - ug/I 0.92 27.5 0.19 1 U 1.5 0.28 1 U 1 U 1 U 0.12 J TRG Cobalt T 1 IMAC ug/I 0.43 J 30.5 0.2 0.085 J 1.3 0.28 1 U 1 U 1 U 1.2 TRG Copper D - ug/I 2.5 U 9.8 0.7 J+ 5 U 0.5 U 0.95 J+ 2.1 J 5 U 5 U 5 U TRG Copper T 1000 02L ug/I 1.1 J 7 0.3 J 0.97 5 U 0.46 J 1.9 J 5 U 5 U 2.3 J TRG Iron D - ug/I 50 U 320 50 U 50 U 418 50 U 50 U 50 U 50 U 154 TRG Iron T 300 02L ug/I 57.6 2260 27.8 J 50 U 477 50 U 50 U 50 U 71 540 TRG Lead D ug/I 0.5U 0.1U 0.1U 1U 0.1U 0.1U 1U 1U 1U 1U TRG Lead T 15 02L ug/I 0.5 U 0.47 0.1 U 0.1 U 1 U 0.1 U 1 U 1 U 1 U 1 U TRG Magnesium T - ug/I 12000 1880 15100 851 9410 3100 10101 157 J 8280 8870 TRG Manganese D - ug/I 127 584 5 U 5 U 101 24 5 U 5 U 22.4 257 TRG Manganese T 50 02L ug/I 118 619 5 U 5 U 111 25.5 5 U 5 U 24.9 264 TRG Mercury D - ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Mercury T 1 02L ug/I 0.2 U 0.17 J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Methane N - ug/I 38.4 16.4 J+ 1.5 J+ 2.1 J+ 2.2 J+ 3 J+ 2.2 J+ 4.3 J+ 5.4 J+ 1.6 J+ TRG Molybdenum D ug/I 3.5 0.29 J 1.8 7.4 6.1 0.99 28.1 30.6 2.8 J 3.1 J TRG Molybdenum T ug/I 1.9 J 1.1 2 8 6.6 0.92 26.3 J 50 J 4.3 J 6.9 TRG Nickel D - ug/I 9 19.4 0.61 5 U 1 1.3 5 U 5 U 5 U 5 U TRG Nickel T 100 02L ug/I 4.5 46.1 0.64 2 5 U 0.5 U 5 U 5 U 5 U 67.7 TRG Nitrogen, NO2 plus NO3 N - ug/I 20 U 300 170 65 20 U 540 20 UJ 80 J 20 U 20 U TRG Potassium T ug/I 11300 5000 U 5000 U 8830 4130 J 5000 U 6720 J 22200 J 8120 20400 TRG Selenium D - ug/I 2.5 U 0.5 U 0.5 U 5 U 0.5 U 0.32 J 5 U 5 U 5 U 5 U TRG Selenium T 20 02L ug/I 2.5 U 0.7 0.5 U 0.54 5 U 0.5 U 5 UJ 23.4 J 5 U 5 U TRG Sodium T - ug/I 30800 4170 J 11700 20000 15400 10600 13200 J 18400 J 22000 23800 TRG Strontium D - ug/I 359 21.3 290 188 212 114 173 174 166 306 TRG Strontium T ug/I 375 25 324 183 228 112 189 228 183 368 TRG Sulfate N 250000 02L ug/I 97500 2700 106000 24400 31200 4100 61600 J 46500 J 56600 61800 TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 0.5 U 0.1 U 0.1 U 1 U 0.1 U 0.1 U 1 U 1 U 1 U 1 U TRG Thallium T 0.2 IMAC ug/I 0.5 U 0.015 J 0.1 U 0.1 U 1 U 0.1 U 1 U 1 U 1 U 1 U TRG Total Dissolved Solids N 500000 02L ug/I 315000 63000 242000 187000 190000 134000 1980001 263000 J 257000 280000 TRG Total Organic Carbon N ug/I 900 J 13600 9900 910 J 1000 U 670 J 940 J 2400 J 6000 3800 TRG Total Suspended Solids N - ug/I 2500 U 23800 2500 U 2500 U 2500 U 2500 U 2500 U 2600 2500 U 9600 TRG Uranium, Natural T ug/I 1 J 0.061 J 0.5 U 0.072 J 0.44 J 0.5 U 14.3 J 3.1 J 0.27 J 0.31 J TRG Vanadium D - ug/I 4.9 0.92 3.5 29.7 0.27 J+ 10.5 129 122 3 U 1.8 J TRG Vanadium T 0.3 IMAC ug/I 3.5 6.1 3.7 24.9 3 U 10.2 114 J 54.6 J 3 U 3.4 TRG Zinc D - ug/I 4.6J 81.5 10U 5.5J 10U 10U 10U 10U 10U 10U TRG Zinc T 1000 02L ug/I 4.4 J 52.1 10 U 10 U 10 U 10 U 10 U 10 U 10 U 10 U FRS Dissolved Oxygen N - mg/I 2.2 1.8 0.6 0.4 1.1 2.8 0.4 0.4 0.3 0.6 FRS 10xidation Reduction Potential N mV 139.1 174.1 195.6 0.6 -87.2 108.7 -48.2 -48.2 -274 -152.4 FRS IpH N 6.5 - 8.5 02L SU 7.2 5.4 6.1 10.6 7 6.4 11 11 8 7.4 FRS I Specific Conductivity N PS/cm 453.7 77.8 379.9 318.4 355 130.4 412.2 412.2 359.7 376.3 Buck Steam Station Page 1 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: AB-10D AB-10S A13-1 D A13-213R AB-2D AB-3D A13-413R A13-413R A13-41BRU A13-613RU Date: 4/4/2016 4/4/2016 4/4/2016 4/4/2016 4/4/2016 4/4/2016 4/4/2016 4/4/2016 4/4/2016 4/4/2016 Sample Type: N N N N N N FD N N N Sample Name: BU-AB-10D BU-AB-10S BU-AB-1D BU-AB-2BR BU-AB-2D BU-AB-3D BU-FD-AB-4BR BU-AB-4BR BU-AB-4BRU BU-AB-6BRU Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit FRS Temperature N Deg C 18.3 26.7 21.9 18.1 19.3 19 16.6 16.6 22.1 18.6 FRS Turbidity, field N NTU 5.2 47.3 2.8 2.2 1.1 5.1 3.8 3.8 3.1 7 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 2 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: AB-7BRU 4/5/2016 N BU-AB-7BRU AB-7BRU 4/5/2016 FD BU-AB-7BRU-FD-MRM AB-81) 4/5/2016 N BU-AB-8BRU AB-9BR 4/5/2016 N BU-AB-9BR AB-9D 4/5/2016 N BU-AB-9D AB-9S 4/5/2016 N BU-AB-9S AS -ID 4/4/2016 N BU-AS-1D AS -IS 4/4/2016 N BU-AS-1S AS-21D 4/4/2016 N BU-AS-2D AS-31D 4/4/2016 N BU-AS-3D Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 928000 382000 5000 U 2700 J 5000 U 5000 U 5000 U TRG Alkalinity, HCO3 N ug/I 39500 J 54100 J 182000 5000 U 23800 47400 83400 5000 U 48000 40600 TRG Alkalinity, lab N ug/I 39500 J 54100 J 182000 1210000 406000 47400 86100 5000 U 48000 40600 TRG Aluminum D ug/I 100 U 100 U 100 U 1320 62.5 J 100 U 100 U 5830 100 U 100 U TRG jAluminum T ug/I 152 J 100 UJ 100 U 1280 342 100 U 100 U 8440 65.4 J 93.2 J TRG Antimony D ug/I 0.24 J 0.22 J 5 U 3.8 J 1.4 J 0.5 U 0.14 J 5 U 0.5 U 0.111 TRG Antimony T 1 IMAC ug/I 0.62 0.53 5 U 2 J 8.4 0.5 U 0.14 J 5 U 0.11 0.11 TRG Arsenic D - ug/I 0.8 0.77 0.83 J 1.8 J 0.91 J 0.28 0.19 4.8 0.096 J 0.47 TRG Arsenic T 10 02L ug/I 0.97 0.87 0.86 J 1.4 J 1.2 0.32 0.16 5.2 0.1 0.45 TRG Barium D - ug/I 12.4 12.3 24 137 20.8 34.2 50.6 24.6 34.9 14 TRG Barium T 700 02L ug/I 12.7 11.9 27 154 36.5 34.5 46.2 39.2 35.1 14.9 TRG Beryllium D - ug/I 0.012 J 0.012 J 1 U 1 J 1 U 0.14 0.1 U 2.7 0.1 U 0.1 U TRG Beryllium T 4 IMAC ug/I 0.1 U 0.1 U 1 U 2 U 1 U 0.024 J 0.1 U 3 0.013 J 0.1 U TRG Boron D - ug/I 25.4 J 50 U 59.6 217 902 50 U 295 1970 50 U 50 U TRG Boron T 700 02L ug/I 69.8 59.3 65.3 217 872 50 U 328 2700 50 U 50 U TRG Cadmium D - ug/I 0.08 U 0.08 U 0.8 U 1.6 U 0.8 U 0.08 U 0.08 U 1.3 0.08 U 0.08 U TRG Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.8 U 1.6 U 0.8 U 0.08 U 0.08 U 1.3 0.08 U 0.08 U TRG Calcium T - ug/I 20000 19200 40200 29200 22900 3730 23300 71000 6950 8980 TRG Chloride N 250000 02L ug/I 5500 5000 7400 17000 12200 13000 6000 12500 1700 1100 TRG Chromium D - ug/1 0.51 0.35 J 5 U 23 5 U 1.2 0.5 1.2 J 0.26 J 5.9 TRG Chromium T 10 02L ug/I 2.7 J 1.2 J+ 5 U 9.9 J 7.2 J+ 0.82 J+ 0.42 J+ 2.4 J 0.49 J+ 5.8 TRG Chromium 6+ T 0.07 DHHS ug/I 0.03 U 0.02 J 0.03 U 10.3 0.086 0.03 U 0.12 0.03 U 0.06 5.1 TRG Cobalt D - ug/I 0.0111 0.1 U 0.59 J 2 U 1 U 20.7 0.028 J 253 0.13 0.04 J TRG Cobalt T 1 IMAC ug/I 0.084 J 0.025 J 0.81 J 2 U 1 U 22 0.035 J 249 0.13 0.059 J TRG Copper D - ug/I 3.4 J 0.2 J 1.3 J 10 U 5 U 2.7 0.32 J+ 15A 0.83 J+ 0.5 J TRG Copper T 1000 02L ug/I 0.53 J+ 0.25 J+ 5 U 10.7 4.1 J+ 0.21 J+ 0.22 J+ 9 0.3 J+ 0.84 J+ TRG Iron D - ug/I 50 U 50 U 131 50 U 50 U 1600 50 U 63.9 50 U 31.2 J TRG Iron T 300 02L ug/I 162 J 49.8 J 92.1 130 97.5 1790 50 U 1160 69.7 159 TRG Lead D - ug/I 0.1U 0.1U 1U 2U 1U 0.1U 0.1U 1U 0.1U 0.1U TRG Lead T 15 02L ug/I 0.1 U 0.1 U 1 U 2 U 1 U 0.1 U 0.1 U 1.4 0.1 U 0.1 U TRG Magnesium T - ug/I 2840 3150 11800 382 5990 3800 6070 52300 1530 2730 TRG Manganese D - ug/I 69.3 76.9 170 5 U 5 U 2540 2.6 J 1090 50.1 3.4 J TRG Manganese T 50 02L ug/I 34.7 35.5 132 5 U 9.8 2300 3.2 J 1540 47.3 8.4 TRG Mercury D - ug/I 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U TRG Mercury T 1 02L ug/I 0.2LI 0.2U 0.2LI 0.2U 0.2LI 0.2U 0.2U 0.2U 0.2U 0.2U TRG IMethane N - ug/1 1.7 J+ 2.6 J+ 1.7 J+ 4.9 J+ 6.5 J+ 31.7 2 J+ 3.2 J+ 2 J+ 2.9 J+ TRG Molybdenum D ug/I 12.4 11.7 8.6 22.5 11.6 0.5 U 1.6 5 U 1.1 4.6 TRG Molybdenum T ug/I 21.2 18.6 10.9 20.2 11.2 0.5 U 1.7 5 U 1.1 4.4 TRG Nickel D - ug/I 0.71 J 0.5 UJ 5 U 10 U 5 U 3 0.52 54.2 1.1 0.66 TRG Nickel T 100 02L ug/I 0.54 J 0.5 UJ 5 U 10 U 5 U 1.3 0.5 U 53.9 0.94 0.5 U TRG Nitrogen, NO2 plus NO3 N - ug/I 20 U 20 U 20 U 20 U 20 U 20 U 120 460 310 670 TRG Potassium T ug/I 27200 23200 10400 637000 269000 7590 9140 27000 5860 5000 U TRG Selenium D - ug/I 0.31 J 0.31 J 5 U IOU 5 U 0.5 U 0.5 U 88 0.5 U 0.5 U TRG Selenium T 20 02L ug/1 1.11 0.67 J 5 U 10 U 5 U 0.5 U 0.5 U 91 0.5 U 0.5 U TRG Sodium T - ug/I 13100 12300 15800 224000 74100 9620 14900 48300 9970 5270 TRG Strontium D ug/I 160 159 108 1450 242 47.4 329 1060 225 42.8 TRG Strontium T - ug/I 154 148 107 1520 416 43.2 352 1540 238 44.2 TRG Sulfate N 250000 02L ug/I 1 68900 55900 7800 96600 98100 690 J 33300 627000 2300 2500 TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 0.1 U 0.1 U 1 U 2 U 1 U 0,087 J 0.1 U 1 U 0.1 U 0.1 U TRG Thallium T 0.2 [MAC ug/I 0.1 U 0.1 U 1 U 2 U 1 U 0.044 J 0.1 U 1 U 0.1 U 0.1 U TRG Total Dissolved Solids N 500000 02L ug/1 172000 161000 217000 1050000 470000 70000 185000 923000 92000 94000 TRG Total Organic Carbon N - ug/I 1000 U 1000 U 1000 U 25000 29000 1000 U 1000 U 1000 U 1000 U 1000 U TRG Total Suspended Solids N ug/I 4200 J 2500 UJ 2500 U 63400 32000 2500 U 2500 U 4100 2500 U 2500 U TRG Uranium, Natural T ug/I 0.14 J 0.13 J 5 10 U 5 U 0.5 U 0.12 J 1.8 J 0.5 U 0.111 TRG Vanadium D - ug/I 0.63 0.51 1.6 J 17.2 5.4 0.3 U 2.2 3 U 1.6 9.7 TRG Vanadium T 0.3 IMAC ug/I 1.9 1.6 1.9 J 15 5.9 J+ 0.12 J 2.9 2.2 J 1.6 9. TRG Zinc D - ug/I 10 U 10 U 10 U 10 U 10 U 11.6 10 U 166 10 U 10 U TRG Zinc T 1000 02L ug/I 10 U 10 U 10 U 7.1 J 6.4 J 9.4 J 10 U 232 10 U 10 U FRS Dissolved Oxygen N - mg/I 0.46 0.46 1.99 0.64 0.6 0.18 0.7 0.3 3.4 3.1 FRS loxidation Reduction Potential N mV -5.3 -5.3 -16.9 -8.3 -167 62.7 59 336 157 185 FRS jpH N 1 6.5 - 8.5 02L SU 9.3 9.3 7.2 11.2 11.8 5.8 9 4.2 6.6 7.5 FRS I Specific Conductivity N I - PS/cm 271 271 381.7 6203 1986 170.4 254 1 1146 105 95 Buck Steam Station Page 3 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: A13-713RU 4/5/2016 N BU-AB-7BRU A13-7BRU 4/5/2016 FD BU-AB-7BRU-FD-MRM A13-81) 4/5/2016 N BU-AB-86RU AB-9BR 4/5/2016 N BU-AB-9BR AB-9D 4/5/2016 N BU-AB-9D AB-9S 4/5/2016 N BU-AB-9S AS-11D 4/4/2016 N BU-AS-1D AS-1S 4/4/2016 N BU-AS-1S AS-21D 4/4/2016 N BU-AS-2D AS-31D 4/4/2016 N BU-AS-3D Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit FRS Temperature N Deg C 14.9 14.9 13.1 15.3 15.8 16.4 17.7 19.3 16.9 17.9 FRS Turbidity, field N NTU 9.55 9.55 1 0.48 1 2.11 1 59.9 1 9.23 1 2.3 1 5 2.5 1 3.7 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 4 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: AS-3S 4/4/2016 N BU-AS-3S BC-18 4/6/2016 N BU-BC-18 BG-1D 3/15/2016 N BU-BG-1D BG-1S 3/15/2016 N BU-BG-1S BG-2D 3/15/2016 N BU-BG-2D BG-2S 3/15/2016 N BU-BG-2S BG-3D 3/15/2016 N BU-BG-3D BG-3D 3/15/2016 FD BU-BG-3D-DUP BG-3S 3/15/2016 N BU-BG-3S GWA-10D 4/5/2016 N BU-GWA-10D Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Alkalinity, CO3 N ug/I 5000 U 5000 U 136000 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 6000 TRG Alkalinity, HCO3 N ug/I 18600 11700 5000 U 41900 69300 16500 56500 46600 6100 146000 TRG Alkalinity, lab N ug/I 18600 11700 152000 41900 69300 16500 56500 46600 6100 152000 TRG Aluminum D ug/I 100 U 66.9 J 1100 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG jAluminum T ug/I 54.3 J 84.2 J 1150 176 100 U 100 U 100 U 100 U 143 100 U TRG Antimony D ug/I 0.25 J 0.5 U 5 U 0.5 U 0.19 J 0.5 U 0.86 0.83 0.5 U 0.5 U TRG Antimony T 1 IMAC ug/I 0.35 J 0.13 J 5 U 0.5 U 0.24 J 0.5 U 0.76 1.1 0.5 U 0.5 U TRG Arsenic D - ug/I 0.33 0.24 1.7 0.11 0.35 0.051 J 0.73 0.77 0.06 J 0.071 J TRG Arsenic T 10 02L ug/I 0.48 0.36 1.9 0.17 0.38 0.077 J 0.78 0.78 0.073 J 0.069 J TRG Barium D - ug/I 24.4 65.6 13 23 7.6 38 6.5 6.4 27 7.7 TRG Barium T 700 02L ug/I 26.4 68.6 13.1 23.4 8.3 40.2 6.3 7.1 27.3 7.9 TRG Beryllium D - ug/I 0.03 J 0.34 1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.091 J+ 0.1 U TRG Beryllium T 4 IMAC ug/I 0.12 0.36 0.37 J 0.12 J+ 0.013 J+ 0.063 J+ 0.1 U 0.013 J+ 0.038 J+ 0.017 J TRG Boron D - ug/I 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U TRG Boron T 700 02L ug/I 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U TRG Cadmium D - ug/I 0.08 U 0.08 U 0.8 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U TRG Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.8 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U TRG Calcium T - ug/I 2990 497 24400 9380 13400 3230 11100 10200 1160 21600 TRG Chloride N 250000 02L ug/I 1300 1400 15500 3600 4900 6100 1700 1600 860 J 8700 TRG Chromium D - ug/I 0.54 1.5 J+ 1.2 J+ 0.84 J+ 0.94 J+ 0.25 J+ 0.42 J+ 0.66 J+ 0.65 J+ 1 TRG Chromium T 10 02L ug/I 1.1 J+ 3.4 J+ 5 U 0.72 0.9 0.39 J 0.86 J+ 0.97 J+ 0.73 J+ 0.31 J+ TRG Chromium 6+ T 0.07 DHHS ug/I 0.27 0.026 J 0.018 J 0.22 0.47 0.078 0.18 0.21 0.18 0.23 TRG Cobalt D - ug/I 5.4 28.4 1 U 0.59 0.017 J 1.8 0.04 J 0.042 J 1.1 0.078 J TRG Cobalt T 1 IMAC ug/I 7.2 33.1 1 U 0.87 0.023 J 2.6 0.086 J 0.09 J 1.1 0.072 J TRG Copper D - ug/I 1.2 1.4 J+ 1.6 J+ 0.74 J+ 0.44 J+ 1.3 J+ 0.64 0.62 0.57 0.79 TRG Copper T 1000 02L ug/I 1.5 J+ 0.94 2.7 J 1.1 0.57 0.17 J 1.2 1.8 0.52 J+ 0.72 TRG Iron D - ug/I 66.4 664 50 U 50 U 50 U 50 U 50 U 50 U 61 50 U TRG Iron T 300 02L ug/I 160 733 41.5 J 249 50 U 50 U 42.8 J+ 51.2 J+ 244 J+ 50 U TRG Lead D - ug/I 0.1U 0.13 1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U TRG Lead T 15 02L ug/I 0.1 U 0.17 1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U TRG Magnesium T - ug/I 1440 1450 100 U 4180 3930 2570 2820 2540 503 12900 TRG Manganese D - ug/I 139 480 5 U 150 5 U 15 4.8 J 4.8 J 12 6.6 TRG Manganese T 50 02L ug/I 181 527 5 U 160 5 U 16.8 9.3 5.8 13.2 4.9 J TRG Mercury D - ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Methane N - ug/I 58.8 45.3 2.6 J+ 1.7 J+ 2.1 J+ 1.8 J+ 2.4 J+ 2 J+ 1.8 J+ 2 J+ TRG Molybdenum D ug/I 0.15 J 0.5 U 42.8 0.65 4.4 0.5 U 5.6 5.8 0.5 U 0.67 TRG Molybdenum T ug/I 0.22 J 0.13 J 49.4 0.64 5.4 0.5 U 5.5 5.8 0.5 U 0.55 TRG Nickel D - ug/I 0.83 2 5 U 2.3 0.5 U 1.5 0.53 0.57 1.1 0.98 TRG Nickel T 100 02L ug/I 1.2 3.4 5 U 1.3 0.5 U 1.3 0.58 0.83 0.94 0.5 U TRG Nitrogen, NO2 plus NO3 N - ug/I 420 20 U 250 210 1100 15 J 280 400 360 240 TRG Potassium T ug/I 25000 U 5000 U 50600 5000 U 8130 5000 U 4500 J 4240 J 5000 U 14200 TRG Selenium D - ug/I 0.5 U 0.5 U 5 U 0.5 U 0.5 U 0.5 U 0.41 J 0.38 J 0.5 U 0.5 U TRG Selenium T 20 02L ug/I 0.5 U 0.5 U 5 U 0.5 U 0.5 U 0.5 U 0.32 J 0.5 U 0.5 U 0.5 U TRG Sodium T - ug/I 25000 U 5000 U 53700 6710 16500 3360 J 9800 8880 5000 U 16500 TRG Strontium D ug/I 34.2 26.2 190 61 100 21 56 56 14 251 TRG Strontium T - ug/I 38.2 26.9 217 62.6 117 20.1 60.9 53.9 14.5 233 TRG Sulfate N 250000 02L ug/I 800 J 1000 U 72000 9500 13000 880 J 12700 10300 660 J 4900 TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 0.1U 0.1U 1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U TRG Thallium T 0.2 IMAC ug/I 0.1 U 0.1 U 1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U TRG Total Dissolved Solids N 500000 02L ug/I 59000 36000 324000 82000 116000 39000 82000 71000 25000 U 182000 TRG Total Organic Carbon N - ug/I 1000 U 1100 8600 1200 1000 U 1000 U 10500 800 J 1000 U 1000 U TRG Total Suspended Solids N ug/I 3600 2500 U 2500 U 4900 2500 U 2500 U 2500 U 2500 U 4000 2500 U TRG Uranium, Natural T ug/I 0.5 U -- 5 U 0.5 U 0.28 J 0.5 U 0.078 J 0.06 J 0.5 U 0.22 J TRG Vanadium D - ug/I 0.78 0.12 J+ 180 1.3 5.7 0.17 J+ 9 9.1 0.32 J+ 15.1 TRG Vanadium T 0.3 IMAC ug/I 0.93 0.2 J 181 1.7 6.6 0.29 J 8.6 10 0.58 J+ 15.3 TRG Zinc D - ug/I 17.8 287 10 U 4.2 J 10 U 15 15 14 6.1 J 10 U TRG Zinc T 1000 02L ug/I 20.6 269 3.8 J+ 4.8 J+ 5 J+ 15.3 J+ 14.2 J+ 19 J+ 15.4 J+ 10 U FRS Dissolved Oxygen N - mg/I 0.5 0.8 0.36 1.06 1.99 2.49 0.7 0.7 4.3 1.9 FRS 10xidation Reduction Potential N mV 151 235.1 83 193.5 158.2 266.2 -120.1 -120.1 177.4 118.7 FRS IpH N 1 6.5 - 8.5 02L SU 5.6 4.6 11.52 6.11 8.44 1 5.28 7.5 7.5 5.5 9.1 FRS I Specific Conductivity N I PS/cm 1 50.9 38.4 842 115.1 191.9 1 60.4 155.1 155.1 22.2 339.8 Buck Steam Station Page 5 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: AS-3S BC-18 13G-1D 13G-1S BG-2D BG-2S BG-3D BG-3D BG-3S GWA-10D Date: 4/4/2016 4/6/2016 3/15/2016 3/15/2016 3/15/2016 3/15/2016 3/15/2016 3/15/2016 3/15/2016 4/5/2016 Sample Type: N N N N N N N FD N N Sample Name: BU-AS-3S BU-BC-18 BU-BG-1D BU-BG-1S BU-BG-2D BU-BG-2S BU-BG-3D BU-BG-3D-DUP BU-BG-3S BU-GWA-10D Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit moor FRS Temperature N Deg C 17.5 10.1 15.8 18.2 17.8 20.6 20.4 17.1 15.4 20.4 FRS Turbidity, field N NTU 5.2 3.3 1.08 7.26 0.54 0.29 2.8 2.8 9.8 1 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 6 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: GWA-10S 4/5/2016 N BU-GWA-10S GWA-11D 4/5/2016 N BU-GWA-11D GWA-11S 4/5/2016 N BU-GWA-11S GWA-12D 4/5/2016 N BU-GWA-12BRU GWA-12S 4/5/2016 N BU-GWA-12S GWA-13D 2/19/2016 N BU-GWA-13D GWA-13SR 4/27/2016 N BU-GWA-13SR GWA-14D 4/6/2016 N BU-GWA-14D GWA-14S 4/7/2016 N BU-GWA-14S GWA-15D 4/6/2016 N BU-GWA-15D Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit - TRG Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 45600 5000 U 920000 5000 U 5000 U TRG Alkalinity, HCO3 N ug/I 174000 67200 7200 62500 62300 73000 39700 318000 16000 32400 TRG Alkalinity, lab N ug/I 174000 67200 7200 62500 62300 119000 39700 1240000 16000 32400 TRG Aluminum D ug/I 100 U 100 U 100 U 100 U 100 U 71 J 100 U 2340 100 U 100 U TRG jAluminum T ug/I 100 U 100 U 100 U 100 U 186 220 104 2470 333 89.2 J TRG Antimony D ug/I 0.5 U 0.5 U 0.5 U 0.11 5 U 2.8 0.111 5 0.5 U 0.5 U TRG Antimony T 1 IMAC ug/I 0.5 U 0.5 U 0.5 U 0.16 J 5 U 2.8 0.5 U 5.7 0.5 U 0.11 TRG Arsenic D - ug/I 0.12 0.041 J 0.1 U 0.16 1 U 3.8 1.4 1.2 0.045 J 0.15 TRG Arsenic T 10 02L ug/I 0.15 0.043 J 0.04 J 0.22 1 U 3.8 1.6 1.6 0.11 0.39 TRG Barium D - ug/I 20.2 59.5 33 6.9 22.9 6.5 37.2 486 51.7 15 TRG Barium T 700 02L ug/I 20.3 63.9 32.5 7.3 25.8 8.1 43.7 471 57.4 15.4 TRG Beryllium D - ug/I 0.1 U 0.1 U 0.28 J+ 0.026 J 0.56 J 0.1 U 0.04 J 1 U 0.24 0.1 U TRG Beryllium T 4 IMAC ug/I 0.018 J 0.1 U 0.23 0.1 U 1 U 0.01 J 0.049 J 1 U 0.22 0.013 J TRG Boron D - ug/I 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U TRG Boron T 700 02L ug/I 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U TRG Cadmium D - ug/I 0.08 U 0.08 U 0.08 U 0.08 U 0.8 U 0.08 U 0.08 U 0.8 U 0.08 U 0.08 U TRG Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.08 U 0.08 U 0.8 U 0.08 U 0.08 U 0.8 U 0.2 0.08 U TRG Calcium T - ug/I 24700 16800 1090 14800 70400 35600 7930 256000 3090 5460 TRG Chloride N 250000 02L ug/I 11300 6800 1500 2300 1600 3500 6300 6700 11200 2000 TRG Chromium D - ug/1 0.89 J+ 5.1 0.41 J+ 2.6 1 J 1.6 J+ 4.7 1.5 J 1.4 0.56 TRG Chromium T 10 02L ug/I 0.49 J+ 4.7 0.37 J+ 2.8 5 U 3.9 10 1 J+ 5.5 1.2 TRG Chromium 6+ T 0.07 DHHS ug/I 0.35 4.2 0.19 2.2 0.43 1.2 0.03 U 0.71 1.1 0.043 J TRG Cobalt D - ug/I 0.012 J 0.016 J 2.4 0.45 0.11 J 0.24 3.4 0.24 J 6.2 32 TRG Cobalt T 1 IMAC ug/I 0.021 J 0.022 J 2.7 0.54 0.18 J 0.46 3.6 0.2 J 7 35.9 TRG Copper D - ug/I 0.69 J+ 0.71 J+ 2.4 J+ 0.65 4.3 J 4.7 J+ 0.34 J+ 2.5 J 0.48 J 0.43 J TRG Copper T 1000 02L ug/I 0.24 J+ 0.36 J+ 0.32 J+ 0.49 J+ 1.4 J+ 0.84 J+ 0.32 J 5 U 0.64 0.2 J TRG Iron D - ug/I 50 U 50 U 50 U 50 U 50 U 50 U 1700 52.7 33.9 J 370 TRG Iron T 300 02L ug/I 50 U 50 U 53.4 57.7 112 140 1760 86.1 666 458 TRG Lead D - ug/I 0.1 U 0.1 U 0.1 U 0.1 U 1 U 0.49 J+ 0.1 U 1 U 0.1 U 0.1 U TRG Lead T 15 02L ug/I 0.1 U 0.1 U 0.1 U 0.1 U 1 U 0.1 U 0.1 U 1 U 0.24 0.1 U TRG Magnesium T - ug/I 19700 7160 909 5780 41100 3840 2170 65.5 J 2520 2140 TRG Manganese D - ug/I 5 U 5.3 34.5 35.1 4.1 J 2.8 J 331 5 U 54.4 410 TRG Manganese T 50 02L ug/I 5 U 5.6 31.7 37.6 51 5.6 348 5 U 67 449 TRG Mercury D - ug/I 0.2U 0.2U 0.2LI 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U TRG Mercury T 1 02L ug/I 0.2LI 0.2U 0.2LI 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U TRG IMethane N - ug/1 1.6 J+ 2.2 J+ 1.9 J+ 1.9 J+ 1.7 J+ 2.2 J+ 10 U 10 J+ 1.8 J+ 2.4 J+ TRG Molybdenum D ug/I 0.14 J 0.5 U 0.5 U 0.6 5 U 10 1.2 22.3 0.5 U 4.2 TRG Molybdenum T ug/I 0.5 U 0.5 U 0.5 U 0.63 5 U 10 1.4 23.4 0.5 U 4.9 TRG Nickel D - ug/I 1.8 0.5 U 1.2 1.5 5 U 0.5 U 13.1 5 U 3.1 1.4 TRG Nickel T 100 02L ug/I 1.7 0.5 U 1.2 1.4 5 U 0.46 J 10.6 5 U 4.8 1.7 TRG Nitrogen, NO2 plus NO3 N - ug/I 120 290 20 U 170 100 20 U 20 U 730 1300 1400 TRG Potassium T ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 4420 J 5000 U 262000 5000 U 5000 U TRG Selenium D - ug/I 0.5 U 0.5 U 0.5 U 0.5 U 5 U 0.53 0.5 U 5 U 0.5 U 0.5 U TRG Selenium T 20 02L ug/1 0.5 U 0.5 U 0.5 U 0.42 J 5 U 0.35 J 0.42 J 5 U 0.5 U 0.5 U TRG Sodium T - ug/I 22100 7760 5000 U 7290 6700 10100 11600 192000 J 8230 5860 TRG Strontium D ug/I 179 174 8.9 133 243 100 103 4530 44.8 41 TRG Strontium T - ug/I 171 169 8 123 226 110 112 4500 46.6 42.5 TRG Sulfate N 250000 02L ug/I 1 14800 13300 1000 U 15700 289000 11300 3400 2500 850 J 640 J TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 0.1 U 0.1 U 0.1 U 0.1 U 1 U 0.1 U 0.1 U 1 U 0.1 U 0.1 U TRG Thallium T 0.2 [MAC ug/I 0.1 U 0.1 U 0.1 U 0.1 U 1 U 0.1 U 0.1 U 1 U 0.1 U 0.1 U TRG Total Dissolved Solids N 500000 02L ug/1 227000 124000 25000 U 106000 487000 199000 J+ 92000 1470000 123000 74000 TRG Total Organic Carbon N - ug/I 1000 U 1000 U 1000 U 1000 U 580 J 3000 2400 18700 1000 U 1000 U TRG Total Suspended Solids N ug/I 2500 U 5000 U 2500 U 2500 U 2700 86800 4000 7800 2500 U 2500 U TRG Uranium, Natural T ug/I 0.43 J 0.5 U 0.5 U 0.5 U 5 U -- 0.5 U 0.16 J 0.5 U 0.5 U TRG Vanadium D - ug/I 22.6 5.8 0.12 J+ 7.2 1.6 J 8.7 0.48 3.6 0.43 1.3 TRG Vanadium T 0.3 IMAC ug/I 23.2 6.1 0.15 J 7.5 1.6 J+ 8.7 1 4.5 2.5 1.$ TRG Zinc D - ug/I 10 U 10 U 10 10 U 81 5.5 J+ 9.4 J 6.1 J 3.9 J 5.8 J TRG Zinc T 1000 02L ug/I IOU 10 U 6.8 J 2.8 J 12.5 3.5 J+ 5.5 J 4.2 J 4.2 J+ 6.1 J FRS Dissolved Oxygen N - mg/I 2.3 0.7 4.3 2.9 2.2 1.1 -- 0.5 3 4.6 FRS 10xidation Reduction Potential N mV 1 174.3 200.1 352.3 108 231 -0.1 -237.5 210.7 -59 FRS jpH N 1 6.5 - 8.5 02L SU 1 6.8 6.3 4.7 6.5 5.8 9.6 13 5.5 6.7 FRS I Specific Conductivity N PS/cm 1 361 190.2 27 163 688 251.6 5899 80.5 82.2 Buck Steam Station Page 7 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: GWA-10S 4/5/2016 N BU-GWA-10S GWA-11D 4/5/2016 N BU-GWA-11D GWA-11S 4/5/2016 N BU-GWA-11S GWA-12D 4/5/2016 N BU-GWA-12BRU GWA-12S 4/5/2016 N BU-GWA-12S GWA-13D 2/19/2016 N BU-GWA-13D GWA-13SR 4/27/2016 N BU-GWA-13SR GWA-14D 4/6/2016 N BU-GWA-14D GWA-14S 4/7/2016 N BU-GWA-14S GWA-15D 4/6/2016 N BU-GWA-15D Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit FRS Temperature N Deg C 14.8 15.4 14.2 15 15.4 13.3 17 14.6 13.7 FRS Turbidity, field N NTU 0.5 0.3 3.3 2.2 2 9.2 6 9 4.9 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 8 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: GWA-15S 4/8/2016 N BU-GWA-15S GWA-17S 4/27/2016 N BU-GWA-17S GWA-18D 4/5/2016 N BU-GWA-18D GWA-18S 4/5/2016 N BU-GWA-18S GWA-19D 2/23/2016 N BU-GWA-19D GWA-19S 2/24/2016 N BU-GWA-19S GWA-1D 4/4/2016 N BU-GWA-1D GWA-1S 4/4/2016 N BU-GWA-1S GWA-20D 2/26/2016 N BU-GWA-20D GWA-20S 2/24/2016 N BU-GWA-20S Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Alkalinity, CO3 N ug/I 5000 U 5000 U 259000 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U TRG Alkalinity, HCO3 N ug/I 13400 83600 5000 U 80900 119000 28400 75100 56500 133000 39000 TRG Alkalinity, lab N ug/I 13400 83600 1110000 80900 119000 28400 75100 56500 133000 39000 TRG Aluminum D ug/I 185 100 U 3090 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG jAluminum T ug/I 173 116 2580 143 58 J 140 100 U 58.2 J 78 J 120 TRG Antimony D ug/I 0.5 U 0.5 U 3.8 J 5 U 0.47 J+ 0.5 U 0.5 U 0.5 U 0.5 U 0.53 TRG Antimony T 1 IMAC ug/I 0.11 J 0.5 U 3.4 J 5 U 0.5 U 0.5 U 0.11 J 0.5 U 0.5 U 0.55 TRG Arsenic D - ug/I 0.12 1.7 15.2 0.5 J 0.71 J+ 0.2 0.5 0.14 0.25 0.075 J TRG Arsenic T 10 02L ug/I 0.14 2.1 13 0.46 J 0.42 0.3 0.54 0.17 0.21 0.11 TRG Barium D - ug/I 39.4 49 131 149 49 35 4.3 J 23 45 40 TRG Barium T 700 02L ug/I 37.6 55.8 139 159 52 35 4.4 J 21.6 51 36 TRG Beryllium D - ug/I 0.16 0.05 J 1 U 1 U 0.017 J+ 0.27 0.1 U 0.1 U 0.015 J+ 0.039 J+ TRG Beryllium T 4 IMAC ug/I 0.18 0.1 U 1 U 0.14 J 0.021 J 0.24 0.1 U 0.1 U 0.015 J+ 0.036 J+ TRG Boron D - ug/I 50 U 41 J 100 50 U 50 U 50 U 50 U 50 U 50 U 50 U TRG Boron T 700 02L ug/I 50 U 41.6 J 94 50 U 45 J 31 J 50 U 50 U 50 U 32 J TRG Cadmium D - ug/I 0.08 U 0.08 U 0.8 U 0.8 U 0.08 U 0.055 J 0.08 U 0.08 U 0.08 U 0.08 U TRG Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.8 U 0.8 U 0.08 U 0.051 J 0.08 U 0.08 U 0.08 U 0.08 U TRG Calcium T - ug/I 2970 15700 81300 59800 42800 8400 20900 8320 30100 10800 TRG Chloride N 250000 02L ug/I 7300 6700 11400 7000 5100 7100 2600 4000 9200 7800 TRG Chromium D - ug/I 0.58 6.9 8.7 2.6 J+ 0.67 J+ 1.3 J+ 4.5 12.1 0.31 J 1.6 J+ TRG Chromium T 10 02L ug/I 0.93 J+ 9.1 8 4.8 J 13 40.6 4.5 11.8 0.49 J+ 1.9 J+ TRG Chromium 6+ T 0.07 DHHS ug/I 0.15 0.03 U 8.9 0.03 U 0.13 J+ 0.31 3.8 9.7 0.03 U 0.6 TRG Cobalt D - ug/I 7.9 2.2 1 U 3.5 2.6 J+ 17.8 0.1 U 0.1 U 2.9 2.6 TRG Cobalt T 1 IMAC ug/I 7.9 2.1 0.18 J 4.2 3.8 16.7 0.019 J 0.04 J 2.6 2.6 TRG Copper D - ug/I 1.4 0.26 J+ 5.6 5 U 0.8 J+ 0.66 J+ 0.29 J+ 0.43 J+ 1.2 1.2 J+ TRG Copper T 1000 02L ug/I 0.84 0.49 J 5.5 5 U 0.56 1.4 0.77 0.24 J 0.28 J+ 1.1 TRG Iron D - ug/I 92 2430 50 U 419 350 57 50 U 50 U 180 50 U TRG Iron T 300 02L ug/I 263 3460 50 U 552 390 380 50 U 59.4 240 250 TRG Lead D - ug/I 0.1 U 0.29 1 U 1 U 0.47 J+ 0.1 U 0.1 U 0.1 U 0.15 0.093 J TRG Lead T 15 02L ug/I 0.13 0.1 U 1 U 1 U 0.1 U 0.1 0.1 U 0.1 U 0.1 U 0.15 TRG Magnesium T - ug/I 993 7380 100 U 18300 7460 4450 3910 7090 16500 6720 TRG Manganese D - ug/I 335 1030 5 U 384 270 460 5 U 5 U 470 90 TRG Manganese T 50 02L ug/I 325 1270 5 U 365 290 430 5 U 5 U 490 84 TRG Mercury D - ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.075 J+ 0.2 U 0.2 U 0.2 U 0.078 J+ TRG Methane N - ug/I 5.2 J+ 10 U 3.1 J+ 2.7 J+ 2.2 J+ 2.4 J+ 1.8 J+ 1.6 J+ 4.3 J+ 2.3 J+ TRG Molybdenum D ug/I 0.5 U 4.4 164 1.6 J 7.8 1.4 2.2 0.16 J 3.4 0.19 J TRG Molybdenum T ug/I 0.5 U 5.4 183 1.9 J 7.8 1.9 2.2 0.16 J 3.1 0.19 J TRG Nickel D - ug/I 1.6 9.6 5 U 6 2.7 20.7 0.5 U 3 8.1 15.7 TRG Nickel T 100 02L ug/I 1.7 8.5 5 U 8.4 7 28.7 0.5 U 2.9 7.7 15.8 TRG Nitrogen, NO2 plus NO3 N - ug/I 1700 180 J+ 320 130 610 270 1500 560 160 20 U TRG Potassium T ug/I 5000 U 5390 507000 4930 J 3000 J 3310 J 5000 U 5000 U 2630 J 5000 U TRG Selenium D - ug/I 0.5 U 0.5 U 3.5 J 5 U 0.67 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Selenium T 20 02L ug/I 0.5 U 0.5 U 5 U 5 U 0.42 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Sodium T - ug/I 8710 11200 167000 17600 21500 14300 8970 6790 13800 6040 TRG Strontium D - ug/I 35.6 126 1840 387 320 110 105 44.6 180 68 TRG Strontium T ug/I 33.9 138 1880 364 350 110 108 43 220 61 TRG Sulfate N 250000 02L ug/I 1900 4700 97400 181000 54700 21700 7400 2100 10100 10500 TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 0.1 U 0.1 U 1 U 1 U 0.34 J+ 0.031 J 0.1 U 0.1 U 0.1 U 0.1 U TRG Thallium T 0.2 IMAC ug/I 0.1 U 0.1 U 1 U 1 U 0.1 U 0.036 J 0.1 U 0.1 U 0.1 U 0.1 U TRG Total Dissolved Solids N 500000 02L ug/I 110000 140000 920000 373000 293000 J+ 157000 J+ 136000 114000 168000 126000 J+ TRG Total Organic Carbon N ug/I 1000 U 2200 15800 1000 U 4100 57900 1000 U 1000 U 1800 1000 U TRG Total Suspended Solids N - ug/I 3500 2500 U 3500 U 5000 U 2500 U 2500 U 2500 U 2500 U 2500 U 2500 U TRG Uranium, Natural T ug/I 0.5 U 0.074 J 5 U 5 U -- -- -- -- -- -- TRG Vanadium D - ug/I 0.6 2.2 14.6 1.9 J 3.3 J+ 0.2 J 10.4 4.5 2.5 0.76 TRG Vanadium T 0.3 IMAC ug/I 1.1 2.1 13.8 1.8 J 3.1 0.77 9.7 4.6 2.2 1.3 TRG Zinc D - ug/I 14.3 10 U 10 U 26.6 10 U 36 J+ 10 U 10 U 10 U 48 J+ TRG Zinc T 1000 02L ug/I 15.5 10 U 3.5 J+ 24.6 J+ 7.6 J+ 32 10 U 10 U 5.1 J 44 FRS Dissolved Oxygen N - mg/I 4.2 -- 6.1 0.8 0.5 2.4 2.8 2.4 0.2 1.1 FRS Oxidation Reduction Potential N mV 213.4 -6.4 50.2 -352.9 -194 95.3 181.9 -481.6 214.2 FRS pH N 6.5 - 8.5 02L SU 5.8 13.4 6.5 8.6 6 8.6 6.2 7.3 5.9 FRS Specific Conductivity N PS/cm 75.9 5659 555.3 368 152.7 180 128.2 328.6 131.6 Buck Steam Station Page 9 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: GWA-15S 4/8/2016 N BU-GWA-15S GWA-17S GWA-18D 4/27/2016 4/5/2016 N N BU-GWA-17S BU-GWA-18D GWA-18S GWA-19D GWA-19S 4/5/2016 2/23/2016 2/24/2016 N N N BU-GWA-18S BU-GWA-19D BU-GWA-19S GWA-1D 4/4/2016 N BU-GWA-1D GWA-1S 4/4/2016 N BU-GWA-1S GWA-20D 2/26/2016 N BU-GWA-20D GWA-20S 2/24/2016 N BU-GWA-20S Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit FRS Temperature N Deg C 16.3 10.9 11.9 15.4 18 14.7 14.7 14.5 15.5 FRS Turbidity, field N NTU 9.6 4.5 9.3 1.3 4.8 1.2 1.2 2 5 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 10 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: GWA-22D 4/4/2016 N BU-GWA-22D GWA-2BR 4/4/2016 N BU-GWA-2BR GWA-2BRU 4/5/2016 N BU-GWA-2BRU GWA-2S 2/17/2016 FD GWA-2S DUP GWA-2S 2/17/2016 N BU-GWA-2S GWA-2S 2/17/2016 FD GWA-2S DUP GWA-3BR 4/5/2016 N BU-GWA-3BR GWA-3BRU 4/5/2016 N BU-GWA-3BRU GWA-3S 4/5/2016 N BU-GWA-3S GWA-4D 4/5/2016 FD BU-FD-GWA-4D Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Alkalinity, CO3 N ug/I 5000 U 121000 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U TRG Alkalinity, HCO3 N ug/I 82200 226000 58800 5100 5100 133000 146000 67600 58200 TRG Alkalinity, lab N ug/I 82200 347000 58800 5100 5100 133000 146000 67600 58200 TRG Aluminum D ug/I 100 U 260 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG jAluminum T ug/I 100 U 313 93 J 66 J 64 J 100 U 100 U 51.5 J 100 U TRG Antimony D - ug/I 0.5 U 8.2 0.4 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Antimony T 1 IMAC ug/I 0.5 U 8.2 0.49 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Arsenic D - ug/I 0.073 J 0.41 J 0.11 0.043 J 0.1 U 0.19 0.87 0.091 J 0.069 J TRG Arsenic T 10 02L ug/I 0.072 J 1 U 0.13 0.1 U 0.04 J 0.6 1 0.14 0.096 J TRG Barium D - ug/I 23.7 237 46.9 81 80 3.1 J 18.6 47.6 19.7 TRG Barium T 700 02L ug/I 22.4 247 48.7 93 94 3.5 J 20 50.4 19.9 TRG Beryllium D - ug/I 0.1 U 1 U 0.042 J 0.043 J 0.047 J 0.1 U 0.1 U 0.1 U 0.032 J TRG Beryllium T 4 IMAC ug/I 0.014 J 1 U 0.1 U 0.05 J 0.054 J 0.02 J 0.01 J 0.1 U 0.1 U TRG Boron D - ug/I 50 U 50 U 50 U 50 U 50 U 50 U 50 U 32.4 J 205 TRG Boron T 700 02L ug/I 50 U 50 U 50 U 50 U 50 U 50 U 25.7 J 41.9 J 201 TRG Cadmium D - ug/I 0.08 U 0.8 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U TRG Cadmium T 2 02L ug/I 0.08 U 0.8 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U TRG Calcium T - ug/I 26500 114000 8220 668 723 34200 35300 14100 20800 TRG Chloride N 250000 02L ug/I 7600 4400 2500 7700 7600 2600 7000 8000 19100 TRG Chromium D - ug/I 1.3 J+ 5.2 2.2 1.5 J+ 1.2 J+ 0.37 J+ 0.5 J+ 0.66 J+ 0.77 J+ TRG Chromium T 10 02L ug/I 1.5 5.8 3.2 1.3 J+ 1.3 J+ 0.22 J+ 0.78 J+ 0.78 J+ 0.36 J+ TRG Chromium 6+ T 0.07 DHHS ug/I 0.86 5.6 1.6 1 0.95 0.03 U 0.03 U 0.31 0.03 U TRG Cobalt D - ug/I 0.34 1 U 0.033 J 7.6 7.8 0.1 U 0.06 J+ 0.043 J+ 0.18 TRG Cobalt T 1 IMAC ug/I 0.36 1 U 0.079 J 8 7.7 0.1 U 0.046 J 0.1 0.22 TRG Copper D - ug/I 0.35 J+ 1.8 J+ 0.42 J 0.85 J+ 1.8 J+ 0.5 U 0.36 J+ 1.4 J+ 0.92 J+ TRG Copper T 1000 02L ug/I 0.68 2.4 J 0.77 J+ 0.62 0.67 0.31 J 0.48 J 0.2 J 0.8 J TRG Iron D - ug/I 50 U 50 U 50 U 50 U 50 U 31.5 J 44.1 J 50 U 50 U TRG Iron T 300 02L ug/I 50 U 50 U 79.5 47 J 50 U 65.1 105 57.8 39.9 J TRG Lead D - ug/I 0.1U 1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U TRG Lead T 15 02L ug/I 0.1 U 1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.18 J TRG Magnesium T - ug/I 8590 396 1980 1350 1340 7890 6950 5980 6850 TRG Manganese D - ug/I 10.1 5 U 5 U 67 75 45.3 78.2 119 22.7 TRG Manganese T 50 02L ug/I 9.8 5 U 3.1 J 73 78 39.5 74.7 118 22.8 TRG Mercury D - ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Methane N - ug/I 1.4 J+ 4.9 J+ 1.7 J+ 10 U 10 U 3.3 J+ 2.2 J+ 1.6 J+ 1.8 J+ TRG Molybdenum D ug/I 0.14 J 8.8 0.34 J 0.5 U 0.5 U 2.4 13.7 0.63 J+ 0.74 J+ TRG Molybdenum T ug/I 0.15 J 9 0.4 J 0.5 U 0.5 U 2.5 14.9 0.72 0.64 TRG Nickel D - ug/I 0.85 5 U 1.5 3 3 0.5 U 1.5 1 1.3 TRG Nickel T 100 02L ug/I 0.78 5 U 0.59 3 2.9 0.5 U 0.45 J 0.58 1.3 TRG Nitrogen, NO2 plus NO3 N - ug/I 300 520 800 720 700 20 U 20 U 94 20 U TRG Potassium T ug/I 5000 U 15600 9570 5000 U 5000 U 2600 J 4110 J 5000 U 2710 J TRG Selenium D - ug/I 0.5 U 5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Selenium T 20 02L ug/I 0.5 U 5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Sodium T - ug/I 11300 15800 8900 5020 5100 10200 39900 9660 12500 TRG Strontium D ug/I 256 1830 98.1 7.3 7.7 167 168 119 144 TRG Strontium T - ug/I 246 1960 94.1 8.4 8.8 152 167 114 134 TRG Sulfate N 250000 02L ug/I 38200 13800 1000 1300 1300 8000 46100 6700 24300 TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 0.1 U 1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U TRG Thallium T 0.2 IMAC ug/I 0.1 U 1 U 0.1 U 0.027 J 0.023 J 0.1 U 0.1 U 0.1 U 0.1 U TRG Total Dissolved Solids N 500000 02L ug/I 204000 372000 79000 25000 U 25000 U 169000 J 259000 61000 155000 J TRG Total Organic Carbon N - ug/I 1000 U 850 J 1000 U 1000 U 1000 U 1000 U 12600 1000 U 1000 U TRG Total Suspended Solids N ug/I 2500 U 90500 2500 U 2500 U 2500 U 2500 U 2500 U 5000 U 2500 U TRG Uranium, Natural T ug/I 0.5 U -- 0.5 U -- -- -- 0.079 J 0.5 U 0.5 U TRG Vanadium D - ug/I 16.4 6.9 2.5 0.5 U 0.5 U 0.084 J+ 0.89 1.2 2.2 TRG Vanadium T 0.3 IMAC ug/I 16.6 7 2.8 0.5 U 0.5 U 0.073 J 1.1 1.6 2.6 TRG Zinc D - ug/I 10 U 10 U 10 U 32 J+ 34 J+ 10 U 10 U 10 U 10 U TRG Zinc T 1000 02L ug/I 10 U 10 U 2.6 J -- 20 17 10 U 10 U 10 U 10 U FRS Dissolved Oxygen N - mg/I 1.1 1.7 5 5 5 -- 0.2 0.8 1 0.5 FRS 10xidation Reduction Potential N mV 90.5 1 -101 191 1 240.5 240.5 1 -87.7 -107.3 140.6 73.6 FRS IpH N 1 6.5 - 8.5 02L SU 6.2 1 12 6.7 1 5.5 5.5 1 8 7.9 6.1 6.5 FRS I Specific Conductivity N PS/cm 1 258.8 1 2200 130 1 51.3 51.3 1 254.4 390 134.1 226.7 Buck Steam Station Page 11 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: GWA-22D 4/4/2016 N BU-GWA-22D GWA-213R 4/4/2016 N BU-GWA-2BR GWA-213RU 4/5/2016 N BU-GWA-213RU GWA-2S 2/17/2016 FD GWA-2S DUP GWA-2S GWA-2S 2/17/2016 2/17/2016 N FD BU-GWA-2S GWA-2S DUP GWA-313R 4/5/2016 N BU-GWA-3BR GWA-38RU 4/5/2016 N BU-GWA-3BRU GWA-3S 4/5/2016 N BU-GWA-3S GWA-4D 4/5/2016 FD BU-FD-GWA-4D Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit FRS Temperature N Deg C 18.8 17.3 12 15 15 13.7 13.7 12 14.7 FRS Turbidity, field N NTU 0.4 9.3 7.9 1.5 1.5 0.3 1.8 3.9 1.2 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 12 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: GWA-4D 4/5/2016 N BU-GWA-4D GWA-4S 4/5/2016 N BU-GWA-4S GWA-5BRU 4/5/2016 N BU-GWA-5BRU GWA-5S 4/5/2016 N BU-GWA-SS GWA-6BR 4/5/2016 N BU-GWA-6BR GWA-6BRU 4/5/2016 N BU-GWA-6BRU GWA-7D 4/4/2016 N BU-GWA-7D GWA-7S 4/4/2016 N BU-GWA-7S GWA-8D 4/4/2016 N BU-GWA-BD GWA-9BR 4/4/2016 N BU-GWA-9BR Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U TRG Alkalinity, HCO3 N ug/I 59900 44000 115000 24900 127000 64200 80000 39300 77100 97300 TRG Alkalinity, lab N ug/I 59900 44000 115000 24900 127000 64200 80000 39300 77100 97300 TRG Aluminum D ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG jAluminum T ug/I 100 U 126 52.2 J 200 176 51.3 J 122 669 85.5 J 100 U TRG Antimony D - ug/I 0.5 U 0.18 J 5 U 0.5 U 5 U 5 U 0.5 U 0.5 U 5 U 5 U TRG Antimony T 1 IMAC ug/I 0.5 U 0.25 J 5 U 0.5 U 5 U 5 U 0.5 U 0.5 U 5 U 2 J TRG Arsenic D - ug/I 0.067 J 0.2 1 U 0.056 J 2 1 U 0.4 0.091 J 0.9 J 1 U TRG Arsenic T 10 02L ug/I 0.079 J 0.33 1 U 0.11 2.1 1 U 0.43 0.12 0.72 J 1 U TRG Barium D - ug/I 19.8 56.9 99.6 37.2 15.1 33.8 36.2 50.1 34.5 12.1 TRG Barium T 700 02L ug/I 19.4 62.1 98.1 39 19.1 34.3 35.1 58.2 35.8 27.9 TRG Beryllium D - ug/I 0.037 J 0.1 U 1 U 0.035 J 1 U 0.25 J 0.1 U 0.1 U 1 U 0.17 J+ TRG Beryllium T 4 IMAC ug/I 0.1 U 0.053 J 1 U 0.017 J 1 U 1 U 0.1 U 0.061 J 1 U 1 U TRG Boron D - ug/I 206 227 332 50 U 50 U 50 U 50 U 50 U 50 U 227 TRG Boron T 700 02L ug/I 192 229 313 50 U 31.9 J 50 U 50 U 50 U 50 U 222 TRG Cadmium D - ug/I 0.054 J 0.08 U 0.8 U 0.08 U 0.8 U 0.8 U 0.08 U 0.08 U 0.8 U 0.8 U TRG Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.8 U 0.08 U 0.8 U 0.8 U 0.08 U 0.08 U 0.8 U 0.8 U TRG Calcium T - ug/I 19500 16000 58700 5890 199000 118000 32600 20600 50500 46500 TRG Chloride N 250000 02L ug/I 18900 17800 10200 1300 11700 9600 2000 2000 5900 23400 TRG Chromium D - ug/I 0.86 J+ 0.44 J+ 1.8 J+ 2.5 J+ 5 U 1.8 J 0.48 J+ 1.2 J+ 5 U 1 J+ TRG Chromium T 10 02L ug/I 0.35 J+ 0.69 J+ 5 U 2 J+ 2.4 J+ 1.6 J+ 0.74 J+ 1.1 J+ 5 U 2.1 J TRG Chromium 6+ T 0.07 DHHS ug/I 0.03 U 0.03 U 0.026 J 1.4 0.03 U 1.2 0.061 J 0.3 0.03 U 1.1 TRG Cobalt D - ug/I 0.19 0.49 0.37 J 0.17 1 U 0.93 J 0.14 0.9 4.4 0.15 J TRG Cobalt T 1 IMAC ug/I 0.24 0.54 0.44 J 0.23 1 U 1 0.22 1.4 3.3 1 U TRG Copper D - ug/I 0.38 J+ 1.2 J+ 6.5 1.2 J+ 5 U 2.4 J 0.82 J+ 0.75 J+ 5 U 5 U TRG Copper T 1000 02L ug/I 0.5 J 0.33 J 4.4 J 0.62 1.2 J+ 2.4 J+ 0.77 0.96 5 U 5 U TRG Iron D - ug/I 26.2 J 50 U 47.9 J 50 U 782 50 U 50 U 50 U 1250 45.5 J TRG Iron T 300 02L ug/I 65.2 J 230 113 488 994 47.6 J 145 1120 1310 50 U TRG Lead D - ug/I 0.1U 0.1U 1U 0.1U 1U 1U 0.1U 0.1U 1U 1U TRG Lead T 15 02L ug/I 0.1 UJ 0.1 U 1 U 0.1 U 1 U 1 U 0.1 U 0.11 1 U 1 U TRG Magnesium T - ug/I 6920 5000 18300 2510 26000 36700 7350 8410 19400 14000 TRG Manganese D - ug/I 22.8 37.9 258 4.7 J 91.1 56.4 12.6 66.4 497 230 TRG Manganese T 50 02L ug/I 20.6 37.9 147 8.6 90.3 53.5 15 86.3 427 10.1 TRG Mercury D - ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Methane N - ug/I 1.8 J+ 3.3 J+ 1.9 J+ 1.8 J+ 5 J+ 1.7 J+ 1.8 J+ 1.6 J+ 4.7 J+ 1.8 J+ TRG Molybdenum D ug/I 0.62 J+ 0.18 J+ 4.6 J 0.5 U 4.8 J 4.6 J 2 0.48 J 5 U 1.8 J TRG Molybdenum T ug/I 0.7 0.24 J 5.9 0.5 U 5.2 4.6 J 2.1 0.48 J 5 U 4.6 J TRG Nickel D - ug/I 1.6 1.9 5 U 1 5 U 5 U 1.3 3.1 5 U 5 U TRG Nickel T 100 02L ug/I 1.4 1.1 5 U 0.93 5 U 5 U 1.4 0.63 5 U 5 U TRG Nitrogen, NO2 plus NO3 N - ug/I 20 U 20 U 35 3100 20 U 360 170 400 35 13 J TRG Potassium T ug/I 2500 J 5000 U 4890 J 5000 U 8820 12200 2910 J 5000 U 5000 U 60500 TRG Selenium D - ug/I 0.5 U 0.5 U 5 U 0.34 J 5 U 5 U 0.5 U 0.5 U 5 U 5 U TRG Selenium T 20 02L ug/I 0.5 U 0.5 U 5 U 0.33 J 5 U 5 U 0.5 U 0.5 U 5 U 5 U TRG Sodium T - ug/I 11100 14600 12700 6180 31600 16200 16000 8450 27400 28000 TRG Strontium D ug/I 145 141 343 52.4 796 582 180 223 630 576 TRG Strontium T - ug/I 131 137 320 48 802 536 180 223 682 700 TRG Sulfate N 250000 02L ug/I 23900 24000 116000 1200 519000 396000 74100 63600 183000 195000 TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 0.1U 0.1U 1U 0.1U 1U 1U 0.1U 0.1U 1U 1U TRG Thallium T 0.2 IMAC ug/I 0.1 U 0.1 U 1 U 0.1 U 1 U 1 U 0.1 U 0.1 U 1 U 1 U TRG Total Dissolved Solids N 500000 02L ug/I 89000 J 133000 313000 49000 918000 679000 219000 172000 J 405000 432000 TRG Total Organic Carbon N - ug/I 1000 U 1000 U 21200 1000 U 3400 1000 U 1000 U 1000 U 18000 2800 TRG Total Suspended Solids N ug/I 2500 U 3400 2500 U 4100 5400 2700 4300 22500 2500 U 5000 U TRG Uranium, Natural T ug/I 0.5 U 0.5 U 0.35 J 0.5 U 2.9 J 5 U 0.53 0.5 U 5 U 5 U TRG Vanadium D - ug/I 2.2 2.5 1.8 J 2 0.87 J 2.3 J 5.4 2.7 2 J 5.5 TRG Vanadium T 0.3 IMAC ug/I 2.5 3.4 2.8 J 2.6 1.1 J+ 2.2 J+ 5.7 4.4 2.2 J 11.4 TRG Zinc D - ug/I 10 U 10 U 3.1 J 4.3 J 10 U 2.5 J 2.8 J 17.2 10 U 10 U TRG Zinc T 1000 02L ug/I 10 U 3.7 J 7.2 J 4.8 J 4.8 J 4.4 J 25.8 47.6 3.4 J 10 U FRS Dissolved Oxygen N - mg/I 0.5 1.3 2.1 5.9 0.3 1.1 1.9 3.6 0.3 0.9 FRS 10xidation Reduction Potential N mV 73.6 117.1 104 1 113.8 -157 143 97.7 191.4 -58 -118.6 FRS IpH N 1 6.5 - 8.5 02L SU 6.5 6.1 6.7 1 6 7.6 6.3 8.3 6.1 6.6 11.3 FRS I Specific Conductivity N PS/cm 1 226.7 177 479.3 1 77.9 1205 913 306.9 227.6 529 896 Buck Steam Station Page 13 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: GWA-4D GWA-4S GWA-513RU GWA-5S GWA-66R GWA-66RU GWA-7D GWA-7S GWA-8D GWA-9BR Date: 4/5/2016 4/5/2016 4/5/2016 4/5/2016 4/5/2016 4/5/2016 4/4/2016 4/4/2016 4/4/2016 4/4/2016 Sample Type: N N N N N N N N N N Sample Name: BU-GWA-4D BU-GWA-4S BU-GWA-5BRU BU-GWA-SS BU-GWA-6BR BU-GWA-66RU BU-GWA-7D BU-GWA-7S BU-GWA-BD BU-GWA-9BR Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit FRS Temperature N Deg C 14.7 15.3 16.5 18.3 15.3 16.4 21.1 23.1 17.1 21 FRS Turbidity, field N I - NTU 1.2 8.5 8.1 6.8 6.7 5 7.4 19.6 4.9 4.7 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 14 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: GWA-9D 4/4/2016 N BU-GWA-9D GWA-9S 4/4/2016 N BU-GWA-9S MW-1D 4/5/2016 N BU-MW-1D MW-1S 4/5/2016 N BU-MW-1S MW-3D 4/5/2016 N BU-MW-3D MW-3S 4/5/2016 N BU-MW-3S MW-3S 4/5/2016 FD BU-FD-MW-3S MW-4D 4/5/2016 N BU-MW-4D MW-4S 4/5/2016 N BU-MW-4S MW-5D 4/5/2016 N BU-MW-SD Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U TRG Alkalinity, HCO3 N ug/I 54100 3700 J 193000 J 151000 70300 24000 23700 57200 57800 61700 TRG Alkalinity, lab N ug/I 54100 3700 J 193000 J 151000 70300 24000 23700 57200 57800 61700 TRG Aluminum D ug/I 100 U 72.2 J 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG jAluminum T ug/I 100 U 133 100 U 100 U 98.8 J 100 U 100 U 100 U 56.5 J 100 U TRG Antimony D - ug/I 5 U 0.5 U 5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Antimony T 1 IMAC ug/I 5 U 0.5 U 5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Arsenic D - ug/I 1 U 0.13 1 U 0.11 0.1 U 0.042 J 0.047 J 0.16 0.053 J 0.054 J TRG Arsenic T 10 02L ug/I 1 U 0.22 1 U 0.1 0.05 J 0.058 J 0.05 J 0.047 J 0.055 J 0.052 J TRG Barium D - ug/I 34.1 57.7 15 27.6 75.8 14.5 14.5 14.6 41 18.9 TRG Barium T 700 02L ug/I 37.2 56.4 14.1 26.2 82.2 14.1 14.4 15.1 42.5 20.4 TRG Beryllium D - ug/I 1 U 0.28 0.33 J 0.1 U 0.1 U 0.034 J+ 0.065 J+ 0.1 U 0.02 J+ 0.011 J+ TRG Beryllium T 4 IMAC ug/I 1 U 0.14 0.15 J 0.1 U 0.013 J 0.1 U 0.021 J 0.1 U 0.014 J 0.1 U TRG Boron D - ug/I 242 260 339 360 584 757 752 584 445 300 TRG Boron T 700 02L ug/I 266 303 291 314 531 650 660 562 379 294 TRG Cadmium D - ug/I 0.8 U 0.18 J+ 0.8 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U TRG Cadmium T 2 02L ug/I 0.8 U 0.16 0.8 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U TRG Calcium T - ug/I 50800 32900 44600 28300 29600 6830 6790 13900 14100 22000 TRG Chloride N 250000 02L ug/I 10000 30500 18700 19200 11100 11700 11700 8600 25100 25800 TRG Chromium D - ug/I 5 U 0.92 J+ 5 U 0.85 J+ 1.4 J+ 0.21 J+ 0.33 J+ 0.26 J 0.42 J+ 0.31 J+ TRG Chromium T 10 02L ug/I 5 U 0.3 J+ 5 U 1.5 J+ 0.36 J+ 0.1 J+ 0.2 J+ 0.29 J+ 0.24 J+ 0.71 J+ TRG Chromium 6+ T 0.07 DHHS ug/I 0.03 UJ 0.026 J 0.028 J 0.65 0.03 U 0.03 U 0.03 UJ 0.022 J 0.03 U 0.052 TRG Cobalt D - ug/I 0.66 J 39.8 1 U 0.013 J 0.13 20 19.7 0.015 J+ 0.09 J 0.05 J TRG Cobalt T 1 IMAC ug/I 0.71 J 50.4 1 U 0.23 0.18 19.5 21.7 0.016 J 0.13 0.16 TRG Copper D - ug/I 5 U 4 6 0.4 J 5.7 1.5 J 7.4 J 3.6 4.8 0.95 J+ TRG Copper T 1000 02L ug/I 5 U 1.9 5 U 0.36 J 0.28 J 0.5 U 0.5 U 0.17 J+ 0.15 J 0.38 J+ TRG Iron D - ug/I 99.1 32.5 J 50 U 50 U 28.1 J 674 613 50 U 50 U 50 U TRG Iron T 300 02L ug/I 86 214 76.8 85.4 281 1530 J 940 J 27.4 J 122 99.9 TRG Lead D - ug/I 1 U 0.1 U 1 U 0.1 U 0.42 0.1 J 0.82 J 0.35 0.45 0.1 U TRG Lead T 15 02L ug/I 1 U 0.097 J 1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.11 TRG Magnesium T - ug/I 16400 15600 21900 22900 12600 5740 5680 J 6560 11700 J 10900 TRG Manganese D - ug/I 26.1 1940 14.9 2.6 J 46.9 1320 1330 5 U 81.1 5 U TRG Manganese T 50 02L ug/I 21 2090 12.9 40.6 45.4 1120 1180 5 U 78.9 5.6 TRG Mercury D - ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Methane N - ug/I 1.7 J+ 20 J 2.4 J+ 1.5 J+ 9.2 J+ 14 J+ 12.6 J+ 1.9 J+ 9.6 J+ 1.6 J+ TRG Molybdenum D ug/I 5 U 0.5 U 5 U 0.48 J 0.21 J 0.5 U 0.5 U 0.25 J+ 0.2 J 0.18 J TRG Molybdenum T ug/I 5 U 0.5 U 5 U 0.56 0.21 J 0.5 U 0.5 U 0.3 J 0.15 J 0.24 J TRG Nickel D - ug/I 5 U 8.7 5 U 0.5 U 0.94 1.1 1.2 0.7 0.47 J 0.5 U TRG Nickel T 100 02L ug/I 5 U 8.2 5 U 0.95 0.53 1.2 1.3 0.63 0.5 U 0.5 U TRG Nitrogen, NO2 plus NO3 N - ug/I 20 U 68 850 1600 20 U 20 U 20 U 20 U 20 U 20 U TRG Potassium T ug/I 5000 U 3000 J 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 2800 J TRG Selenium D - ug/I 5 U 0.73 5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Selenium T 20 02L ug/I 5 U 1.5 5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Sodium T - ug/I 14400 19400 9680 11900 13800 13000 12800 11200 16000 14600 TRG Strontium D ug/I 584 244 208 204 259 67 66.5 147 119 230 TRG Strontium T - ug/I 628 314 172 165 236 58.4 58.7 140 107 203 TRG Sulfate N 250000 02L ug/I 166000 152000 22300 14100 78700 J 33800 34700 J 20500 33200 44400 TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 1 U 0.067 J 1 U 0.1 U 0.1 U 0.017 J 0.02 J 0.1 U 0.1 U 0.1 U TRG Thallium T 0.2 IMAC ug/I 1 U 0.018 J 1 U 0.1 U 0.1 U 0.019 J 0.024 J 0.1 U 0.1 U 0.1 U TRG Total Dissolved Solids N 500000 02L ug/I 367000 302000 232000 198000 193000 66000 76000 143000 121000 175000 TRG Total Organic Carbon N - ug/I 1000 U 1000 U 1000 U 23600 1000 U 1000 UJ 1700 J 1000 U 1000 U 1000 U TRG Total Suspended Solids N ug/I 2500 U 4900 2500 U 2500 U 2600 2500 U 2500 U 2500 U 2500 U 2500 U TRG Uranium, Natural T ug/I 5 U 0.5 U -- -- 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U TRG Vanadium D - ug/I 8.8 0.18 J+ 10 16.9 3.1 0.13 J+ 0.14 J+ 1.8 0.49 J+ 1.8 TRG Vanadium T 0.3 IMAC ug/I 10.9 0.42 10.7 18.1 3.5 0.18 J+ 0.11 J+ 2.2 0.6 J+ 1.9 TRG Zinc D - ug/I 29.4 47.4 10 U 10 U 4 J 10 U 5.8 J 10 U 2.5 J 10 U TRG Zinc T 1000 02L ug/I 46.9 53.9 10 U 10 U 10 U 10 U 10 U 10 U 2.6 J+ 10 U FRS Dissolved Oxygen N - mg/I 0.6 0.4 0.3 0.8 0.2 0.1 0.1 0.44 0.3 0.6 FRS 10xidation Reduction Potential N mV 51.6 214.3 140.4 140.9 89.2 101.8 101.8 99.8 165.4 218.6 FRS IpH N 1 6.5 - 8.5 02L I SU 1 6.3 4.9 6.9 6.9 1 6.3 1 5.8 5.8 6.5 6.3 6 FRS I Specific Conductivity N PS/cm 1 474.4 465.9 422.8 361.5 1 324.5 1 166.5 166.5 187.9 257.2 305.8 Buck Steam Station Page 15 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: GWA-9D GWA-9S MW-1D MW-is MW-3D MW-3S MW-3S MW-41D MW-4S MW-5D Date: 4/4/2016 4/4/2016 4/5/2016 4/5/2016 4/5/2016 4/5/2016 4/5/2016 4/5/2016 4/5/2016 4/5/2016 Sample Type: N N N N N N FD N N N Sample Name: BU-GWA-9D BU-GWA-9S BU-MW-1D BU-MW-1S BU-MW-3D BU-MW-3S BU-FD-MW-3S BU-MW-4D BU-MW-4S BU-MW-SD Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit FRS Temperature N Deg C 24.8 26.2 12.6 12 17.4 15.8 15.8 16.5 16.3 12.7 FRS Turbidity, field N NTU 1.5 8.2 1.1 1.4 7 9.4 9.4 0.87 4.2 1.2 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 16 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: Date: Sample Type: Sample Name: MW-5S 4/5/2016 N BU-MW-SS MW-6BR 2/19/2016 N BU-MW-6BR MW-6D 3/28/2016 N BU-MW-6D MW-6S 3/28/2016 N BU-MW-6S PWS-0180647 4/7/2016 N BU-PWSID:0180647 Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit MOSEEK- TRG Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U TRG Alkalinity, HCO3 N ug/I 30500 68900 43600 17600 119000 TRG Alkalinity, lab N ug/I 30500 68900 43600 17600 119000 TRG Aluminum D ug/I 100 U 100 U 100 U 100 U 100 U TRG jAluminum T ug/I 100 U 650 100 U 100 U 100 U TRG Antimony D ug/I 0.5 U 0.111 0.73 0.5 U 10 U TRG Antimony T 1 IMAC ug/I 0.5 U 0.15 J 0.7 0.5 U 10 U TRG Arsenic D - ug/I 0.053 J 0.46 0.063 J 0.075 J 2 U TRG Arsenic T 10 02L ug/I 0.051 J 0.58 0.078 J 0.092 J 2 U TRG Barium D - ug/I 55.5 14 55 5 U 5 U TRG Barium T 700 02L ug/I 55.2 27 50.3 43.3 5 U TRG Beryllium D - ug/I 0.054 J+ 0.1 U 0.1 U 0.076 J 2 U TRG Beryllium T 4 IMAC ug/I 0.1 U 0.093 J 0.1 U 0.052 J 2 U TRG Boron D - ug/I 206 50 U 50 U 50 U 50 U TRG Boron T 700 02L ug/I 195 50 U 50 U 50 U 26.2 J TRG Cadmium D - ug/I 0.08 U 0.08 U 0.08 U 0.08 U 1.6 U TRG Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.08 U 0.08 U 1.6 U TRG Calcium T - ug/I 23100 15100 8160 2820 234000 TRG Chloride N 250000 02L ug/I 37800 1800 2200 4600 13000 TRG Chromium D - ug/1 1.1 J+ 0.21 J+ 0.57 0.22 J 10 U TRG Chromium T 10 02L ug/I 1.3 J+ 5.6 0.29 J+ 0.33 J+ 10 U TRG Chromium 6+ T 0.07 DHHS ug/I 1 0.017 J+ 0.15 0.03 U 0.03 UJ TRG Cobalt D - ug/I 0.02 J 0.077 J 0.025 J 8.5 2 U TRG Cobalt T 1 IMAC ug/I 0.032 J 0.28 0.03 J+ 8.1 2 U TRG Copper D - ug/I 1.1 J+ 0.77 J+ 2.7 0.51 10 U TRG Copper T 1000 02L ug/I 0.35 J+ 0.9 J+ 2.8 0.48 J+ 10 U TRG Iron D - ug/I 50 U 50 U 50 U 50 U 130 TRG Iron T 300 02L ug/I 50 U 480 50 U 693 168 TRG Lead D - ug/I 0.1 U 0.16 J+ 0.1 U 0.1 U 2 U TRG Lead T 15 02L ug/I 0.1 U 0.62 0.14 0.12 2 U TRG Magnesium T - ug/I 8580 5420 4500 3320 36100 TRG Manganese D - ug/I 5 U 14 5 U 5 U 208 TRG Manganese T 50 02L ug/I 5 U 22 5 U 131 220 TRG Mercury D - ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG IMethane N - ug/1 1.5 J+ 2 J+ 1.6 J+ 669 3 J+ TRG Molybdenum D ug/I 0.5 U 2.4 0.93 0.5 U 10 U TRG Molybdenum T ug/I 0.5 U 2.4 1.1 0.5 U 10 U TRG Nickel D - ug/I 0.48 J 0.46 J 2.6 8 10 U TRG Nickel T 100 02L ug/I 0.45 J 3.2 2.2 7.9 10 U TRG Nitrogen, NO2 plus NO3 N - ug/I 58 29 360 36 20 U TRG Potassium T ug/I 5000 U 5000 U 3050 J 5000 U 5000 U TRG Selenium D - ug/I 0.5 U 0.5 U 0.5 U 0.5 U 10 U TRG Selenium T 20 02L ug/1 0.5 U 0.56 0.5 U 0.5 U 10 U TRG Sodium T - ug/I 21000 7280 5460 2670 J 39800 TRG Strontium D ug/I 223 70 66 2.6 J 818 TRG Strontium T - ug/I 215 82 58.2 21.6 881 TRG Sulfate N 250000 02L ug/I 62800 5900 2400 1000 U 680000 TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 0.1 U 0.1 U 0.1 U 0.1 U 2 U TRG Thallium T 0.2 [MAC ug/I 0.1 U 0.1 U 0.1 U 0.1 U 2 U TRG Total Dissolved Solids N 500000 02L ug/1 182000 139000 J+ 93000 44000 1240000 TRG Total Organic Carbon N - ug/I 13700 10700 10500 1000 U 1000 U TRG Total Suspended Solids N ug/I 2500 U 27200 2500 U 2500 U 2700 TRG Uranium, Natural T ug/I 0.5 U -- 0.5 U 0.5 U -- TRG Vanadium D - ug/I 1.2 4.2 13.2 0.32 6 U TRG Vanadium T 0.3 IMAC ug/I 11 4 6 11.7 0.34 6 U TRG Zinc D - ug/I 2.8 J 3.9 J+ 15 J+ 10 U 59.3 TRG Zinc T 1000 02L ug/I 3.6 J 20 J+ 17A 7.1 J 63.7 FRS Dissolved Oxygen N - mg/I 4.3 0.5 3.1 0.6 0.2 FRS loxidation Reduction Potential N mV 1 238.1 -3 209 176 -19.4 FRS jpH N 1 6.5 - 8.5 02L SU 1 6 7.6 6.2 5.3 7.3 FRS I Specific Conductivity N PS/cm 1 332.9 158.9 98.4 57.2 1412 Buck Steam Station Page 17 of 18 CSA Supplement 2 Table 3-1: Round 5 Analytical Results of Groundwater Monitoring Well Locations Location: MW-5S MW-6BR MW-6D MW-6S PWS-0180647 Date: 4/5/2016 2/19/2016 3/28/2016 3/28/2016 4/7/2016 Sample Type: N N N N N Sample Name: BU-MW-SS BU-MW-6BR BU-MW-6D BU-MW-6S BU-PWSID:0180647 Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit FRS Temperature N Deg C 12.3 8.6 15.1 15.6 17.3 FRS Turbidity, field N NTU 1.5 14.6 1.6 1 0.5 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 18 of 18 CSA Supplement 2 Table 3-2: Round 5 Analytical Results of Porewater Monitoring Well Locations Location: Date: Sample Type: Sample Name: AB-2S 4/4/2016 N BU-AB-2S AB-2SL 4/4/2016 N BU-AB-2SL AB-3S 4/4/2016 N BU-AB-3S AB-4S 4/4/2016 N BU-AB-4S AB-4SL 4/4/2016 N BU-AB-4SL AB-5S 4/4/2016 N BU-AB-SS AB-5SL 4/4/2016 N BU-AB-5SL AB-7S 4/5/2016 N BU-AB-7S Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Alkalinity, CO3 N ug/1 5000 U 5000 U 5000 U 5000 U 11200 5000 U 5000 U 5000 U TRG Alkalinity, HCO3 N ug/I 226000 131000 351000 34300 46800 194000 116000 110000 TRG Alkalinity, lab N ug/I 226000 131000 351000 34300 58000 194000 116000 110000 TRG Aluminum D ug/I 100 U 85.1 J 100 U 100 U 524 100 U 100 U 346 TRG Aluminum T ug/I 100 U 272 100 U 100 U 552 100 U 100 U 403 TRG Antimony D - ug/I 18.2 4 J 4.7 J 0.5 U 1.8 J 5 U 0.5 U 0.19 J TRG Antimony T 1 [MAC ug/I 18.6 4.2 J 4.3 J 0.12 J 1.7 J 5 U 0.12 J 0.19 J TRG Arsenic D - ug/I 121 1020 95.8 30 530 921 61.8 425 TRG Arsenic T 10 02L ug/I 125 998 82.7 33.3 571 901 52.8 411 TRG Barium D - ug/I 192 815 293 72.4 132 317 177 225 TRG Barium T 700 02L ug/I 207 883 296 70.1 151 337 185 229 TRG Beryllium D - ug/I 0.45 J 1 U 1 U 0.014 J+ 1 U 0.22 J 0.1 U 0.1 U TRG Beryllium T 4 IMAC ug/I 1 U 1 U 1 U 0.051 J 1 U 1 U 0.017 J 0.1 U TRG Boron D - ug/I 1570 3540 1990 70.9 7610 406 85.7 476 TRG Boron T 700 02L ug/I 1830 3920 1980 75.5 8460 464 87.2 465 TRG Cadmium D - ug/I 0.8 U 0.8 U 0.8 U 0.08 U 0.8 U 0.8 U 0.08 U 0.08 U TRG Cadmium T 2 02L ug/I 0.8 U 0.8 U 0.8 U 0.08 U 0.8 U 0.8 U 0.08 U 0.08 U TRG Calcium T - ug/I 61600 73600 111000 20700 72900 73200 13200 37100 TRG Chloride N 250000 02L ug/I 41400 59200 36600 9100 11100 20900 1800 15000 TRG Chromium D - ug/I 5 U 5 U 5 U 1.3 J+ 1.7 J+ 1 J+ 0.32 J+ 0.22 J TRG Chromium T 10 02L ug/I 5 U 1.4 J+ 5 U 0.27 J+ 5 U 5 U 0.13 J 0.21 J+ TRG Chromium 6+ T 0.07 DHHS ug/I 0.15 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U TRG Cobalt D - ug/I 13.7 0.54 J 7.1 15.2 0.12 J 0.27 J 12 0.01 J TRG Cobalt T 1 [MAC ug/I 14.1 0.8 J 6.5 17.6 1 U 0.24 J 13.3 0.1 U TRG Copper D - ug/I 8.5 5 U 5 U 0.49 J 5 U 5 U 0.5 U 0.15 J TRG Copper T 1000 02L ug/I 5 U 1.2 J 5 U 0.23 J 5 U 5 U 0.5 U 0.13 J+ TRG Iron D - ug/I 50 U 315 243 3590 50 U 8330 17700 31.2 J TRG Iron T 300 02L ug/I 50 U 495 321 3850 50 U 9740 19200 127 TRG Lead D - ug/I 1.1 1 U 1 U 0.1 U 1 U 1 U 0.1 U 0.1 U TRG Lead T 15 02L ug/I 1 U 1 U 1 U 0.1 U 1 U 1 U 0.1 U 0.1 U TRG Magnesium T - ug/I 14600 11400 24400 9280 7420 13500 9740 7730 TRG Manganese D - ug/I 196 113 937 177 9.5 1410 3550 60.6 TRG Manganese T 50 02L ug/I 215 123 970 178 11.3 1540 3770 52.1 TRG Mercury D - ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Mercury T 1 02L ug/I 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U TRG Methane N ug/I 2.4 J+ 15.4 15.2 J+ 9.2 J+ 9700 26.6 3080 295 TRG Molybdenum D ug/I 93.7 917 448 4.2 1310 41 1.7 31.7 TRG Molybdenum T ug/I 98.8 887 378 4.5 1210 42.4 0.96 33.3 TRG Nickel D - ug/I 16.7 16.9 9.1 18.4 6.3 5 U 0.6 1.2 TRG Nickel T 100 02L ug/I 17.3 16.2 7.7 19.6 5.9 5 U 0.55 0.78 TRG Nitrogen, NO2 plus NO3 N - ug/I 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U TRG Potassium T ug/I 20600 27300 25900 4600 J 12800 6790 2990 J 9090 TRG Selenium D - ug/I 15.3 5 U 5 U 0.5 U 5 U 5 U 0.5 U 0.5 U TRG Selenium T 20 02L ug/I 15 5 U 5 U 0.5 U 5 U 5 U 0.5 U 0.5 U TRG Sodium T - ug/I 59000 41600 58300 12600 7070 21100 8070 20400 TRG Strontium D ug/I 1360 2060 3250 398 1560 1460 453 1150 TRG Strontium T - ug/I 1450 2230 3460 405 1680 1610 445 1100 TRG Sulfate N 250000 02L ug/I 123000 166000 167000 85400 185000 95700 1400 58800 TRG Sulfide N - ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U TRG Thallium D - ug/I 0.85 J 1 U 1 U 0.14 1 U 1 U 0.056 J 0.1 U TRG Thallium T 0.2 IMAC ug/I 0.32 J 1 U 1 U 0.18 1 U 1 U 0.016 J 0.1 U TRG Total Dissolved Solids N 500000 02L ug/I 489000 471000 635000 194000 356000 374000 116000 202000 TRG Total Organic Carbon N - ug/1 1000 U 620 J 1000 U 9000 2200 1000 U 860 J 1000 U TRG Total Suspended Solids N ug/1 2500 U 2500 5000 U 2500 U 2500 U 19200 17400 2500 U Buck Steam Station Page 1 of 4 CSA Supplement 2 Table 3-2: Round 5 Analytical Results of Porewater Monitoring Well Locations Location: Date: Sample Type: Sample Name: A13-2S 4/4/2016 N BU-AB-2S AB-2SL 4/4/2016 N BU-AB-2SL A13-3S 4/4/2016 N BU-AB-3S AB-4S 4/4/2016 N BU-AB-4S A13-4SL 4/4/2016 N BU-AB-4SL AB-5S 4/4/2016 N BU-AB-SS AB-5SL 4/4/2016 N BU-AB-5SL AB-7S 4/5/2016 N BU-AB-7S Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Uranium, Natural T ug/I 10.2 11.9 33.5 0.5 U 5 U 1.8 J 0.089 J 0.75 TRG Vanadium D - ug/I 146 6.4 11.6 0.62 J+ 3 U 2.9 J 0.39 J+ 0.21 J TRG Vanadium T 0.3 IMAC ug/I 150 8.3 12.1 1 J+ 3 U 6.4 0.44 0.21 J TRG Zinc D - ug/I 3.2 J 10 U 32.5 11.4 10 U 10 U 10 U 10 U TRG Zinc T 1000 02L ug/I 3.2 J 10 U 28.3 14.2 10 U 10 U 10 U 10 U FRS Dissolved Oxygen N - mg/I 0.2 0.5 0.4 0.9 0.2 0.3 0.2 0.22 FRS Oxidation Reduction Potential N mV 86.7 -155 -46.8 17.4 -75 -131.7 -123.4 18.6 FRS pH N 6.5 - 8.5 02L SU 6.8 7.9 7.4 6.2 9 7.2 6.7 8.5 FRS Specific Conductivity N PS/cm 735 762 1020 238.7 500.1 515 263.3 363.6 FRS Temperature N Deg C 20.9 17 19.3 18.2 17.1 18.7 18.5 14.3 FRS Turbidity, field N - NTU 2.4 8.1 1.4 7.8 0.7 7.88 9.5 0.67 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 2 of 4 CSA Supplement 2 Table 3-2: Round 5 Analytical Results of Porewater Monitoring Well Locations Location: Date: Sample Type: Sample Name: AB-7SL 4/5/2016 N BU-AB-7SL AB-8S 4/5/2016 N BU-AB-8S Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Alkalinity, CO3 N ug/I 19600 3800 J TRG Alkalinity, HCO3 N ug/I 25600 175000 TRG Alkalinity, lab N ug/I 45100 179000 TRG Aluminum D ug/I 4920 144 TRG Aluminum T ug/I 4900 179 TRG Antimony D - ug/I 8.8 5 U TRG Antimony T 1 IMAC ug/I 8.3 5 U TRG Arsenic D - ug/I 371 974 TRG Arsenic T 10 02L ug/I 337 958 TRG Barium D - ug/I 74.4 293 TRG Barium T 700 02L ug/I 81.1 312 TRG Beryllium D - ug/I 0.034 J 1 U TRG Beryllium T 4 IMAC ug/I 0.1 U 1 U TRG Boron D - ug/I 1340 1420 TRG Boron T 700 02L ug/I 1320 1400 TRG Cadmium D - ug/I 0.08 U 0.8 U TRG Cadmium T 2 02L ug/I 0.08 U 0.8 U TRG Calcium T - ug/I 22800 46600 TRG Chloride N 250000 02L ug/I 11400 6600 TRG Chromium D - ug/I 0.3 J 5 U TRG Chromium T 10 02L ug/I 0.23 J+ 5 U TRG Chromium 6+ T 0.07 DHHS ug/I 0.033 0.03 U TRG Cobalt D - ug/I 0.01 J 1 U TRG Cobalt T 1 [MAC ug/I 0.01 J 1 U TRG Copper D - ug/I 0.58 5 U TRG Copper T 1000 02L ug/I 0.17 J+ 5 U TRG Iron D - ug/I 50 U 50 U TRG Iron T 300 02L ug/I 50 U 46.4 J TRG Lead D - ug/I 0.1 U 1 U TRG Lead T 15 02L ug/I 0.1 U 1 U TRG Magnesium T - ug/I 65.4 J 11200 TRG Manganese D - ug/I 5 U 42.4 TRG Manganese T 50 02L ug/I 5 U 39.3 TRG Mercury D - ug/I 0.2 U 0.2 U TRG Mercury T 1 02L ug/I 0.2 U 0.2 U TRG Methane N ug/I 858 J 10.1 J+ TRG Molybdenum D ug/I 95.2 52.7 TRG Molybdenum T ug/I 95.1 55 TRG Nickel D - ug/I 1.8 5 U TRG Nickel T 100 02L ug/I 1.4 5 U TRG Nitrogen, NO2 plus NO3 N - ug/I 420 20 U TRG Potassium T ug/I 11600 9170 TRG Selenium D - ug/I 1.1 5 U TRG Selenium T 20 02L ug/I 0.64 5 U TRG Sodium T - ug/I 14200 10400 TRG Strontium D ug/I 604 1110 TRG Strontium T - ug/I 611 1120 TRG Sulfate N 250000 02L ug/I 53100 27300 TRG Sulfide N - ug/I 100 U 100 U TRG Thallium D - ug/I 0.1 U 1 U TRG Thallium T 0.2 IMAC ug/I 0.1 U 1 U TRG Total Dissolved Solids N 500000 02L ug/I 154000 225000 TRG Total Organic Carbon N - ug/I 1000 U 1000 U TRG Total Suspended Solids N ug/I 5000 U 2500 U Buck Steam Station Page 3 of 4 CSA Supplement 2 Table 3-2: Round 5 Analytical Results of Porewater Monitoring Well Locations Location: Date: Sample Type: Sample Name: AB-7SL 4/5/2016 N BU-AB-7SL AB-8S 4/5/2016 N BU-AB-8S Result Type Constituent Fraction NCDEQ GWQS GWQS Source Unit TRG Uranium, Natural T - ug/I 0.5 U 19.2 TRG Vanadium D - ug/I 21.6 5.7 TRG Vanadium T 0.3 IMAC ug/I 20 5.6 TRG Zinc D - ug/I 10 U 10 U TRG Zinc T 1000 02L ug/I 10 U 10 U FRS Dissolved Oxygen N - mg/I 0.43 0.21 FRS Oxidation Reduction Potential N - mV 61.4 -51.2 FRS pH N 6.5 - 8.5 02L SU 9.3 8.8 FRS Specific Conductivity N - PS/Cm 255.4 382.4 FRS Temperature N - Deg C 15 12.2 FRS Turbidity, field N I NTU 1.71 0.65 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station Page 4 of 4 CSA Supplement 2 Table 3-3: Round 5 Analytical Results of Surface Water Locations Location: Date: Sample Type: Sample Name: SW-AB1 4/6/2016 N BU-SW-AB1 SW-AB2 4/6/2016 N BU-SW-AB2 SW-AB3 4/6/2016 N BU-SW-AB3 SW-AB4 4/6/2016 N BU-SW-AB4 SW-AB5 4/6/2016 N BU-SW-AB5 SW-AB6 4/6/2016 N BU-SW-AB6 SW-AB7 4/6/2016 N BU-SW-AB7 Constituent Fraction NCDEQ 02B SWQS (Class B - Water Supply) Unit Alkalinity, CO3 N -- ug/I 5000 U 5200 9900 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N -- ug/I 37400 88700 80700 39300 39700 73000 74100 Alkalinity, lab N -- ug/I 37400 93900 90700 39300 39700 73000 74100 Aluminum D -- ug/I 100 U 100 U 100 U 100 U 100 U 68.1 J 56.8 J Aluminum T 87 ug/I 62.7 J 281 257 162 2500 J 320 211 Antimony D -- ug/I 0.9 3.4 J 3.5 J 0.93 0.91 2.5 J 2.3 J Antimony T 5.6 ug/I 0.94 3.5 J 3.5 J 0.93 1.6 2.5 J 2.4 J Arsenic D 150 ug/I 4 8.7 9.2 7.1 7.6 31.5 25.3 Arsenic T 10 ug/I 4.7 9.9 10.1 11.1 23.7 37 26.9 Barium D -- ug/I 53.6 52.9 51.9 59.1 60.4 52.7 49.2 Barium T 1000 ug/I 58.3 66.2 69.4 70.9 110 63.6 60.9 Beryllium D 6.5 ug/I 0.1 U 1 U 1 U 0.016 J 0.1 U 1 U 1 U Beryllium T -- ug/I 0.022 J 1 U 1 U 0.028 J 0.67 1 U 1 U Boron D -- ug/I 179 246 247 83 79.6 236 209 Boron T -- ug/I 179 252 255 81.1 79.6 232 223 Cadmium D 0.15 ug/I 0.08 U 0.8 U 0.8 U 0.08 U 0.08 U 0.8 U 0.8 U Cadmium T -- ug/I 0.08 U 0.8 U 0.8 U 0.32 0.13 0.8 U 0.8 U Calcium T -- ug/I 11900 33100 33300 8710 9020 29400 29700 Chloride N 230000 ug/I 20200 80500 80500 15600 15700 54200 54000 Chromium D 11 ug/I 0.36 J 1.6 J 5 U 0.36 J 0.7 5 U 5 U Chromium T -- ug/I 0.3 J+ 5 U 5 U 0.66 J+ 4.2 J+ 5 U 5 U Chromium 6+ T -- ug/I 0.03 U 0.039 J 0.034 0.027 J 0.026 J 0.059 0.067 Cobalt D -- ug/I 0.96 0.65 J 0.6 J 0.092 J 0.17 0.65 J 0.49 J Cobalt T 3 ug/I 1.2 1 0.99 J 0.4 3.8 0.96 J 0.75 J Copper D 2.7 ug/I 1.9 3.4 J 3.8 J 2.7 2.6 3.6 J 3.8 J Copper T -- ug/I 1.5 4 J 4.1 J 2.1 12 4.2 J 3.3 J Iron D -- ug/I 394 211 213 65.4 87.6 232 204 Iron T -- ug/I 730 711 785 453 2490 618 453 Lead D 0.54 ug/I 0.1 U 1 U 1 U 0.13 0.12 1 U 1 U Lead T -- ug/I 0.13 1 U 1 U 0.45 4.8 1 U 1 U Magnesium T -- ug/I 4930 12300 12200 4170 4240 10700 10800 Manganese D -- ug/I 159 27.1 23.2 20.1 58.2 34.8 30.6 Manganese T -- ug/I 202 120 122 162 296 102 100 Mercury T 0.012 ug/I 0.00117 J+ 0.00273 0.00287 0.00418 J+ 0.00525 0.00238 J+ 0.00245 J+ Methane N -- ug/I 20.6 10.3 J+ 3.4 J+ 11.3 J+ 25.5 5.4 J+ 5.3 J+ Molybdenum D -- ug/I 7.8 7.9 8.2 11.2 10.8 14.8 12.2 Molybdenum T 160 ug/I 9.1 8.1 8.4 10.9 11.1 15.7 12.4 Nickel D 16 ug/I 3.4 5 U 5 U 1.9 2.4 5 U 5 U Nickel T 25 ug/I 3.4 5 U 5 U 1.8 7 5 U 5 U Nitrogen, NO2 plus NO3 N -- ug/I 20 U 630 580 440 20 U 38 51 Potassium T -- ug/I 7260 12500 12600 6150 6260 10100 10100 Selenium D -- ug/I 0.53 5 U 5 U 0.78 0.69 5 U 5 U Selenium T 5 ug/I 0.79 5 U 5 U 0.77 2.2 5 U 5 U Sodium T -- ug/I 18500 72100 72300 15500 15500 50400 51100 Strontium D -- ug/I 193 309 314 134 134 322 298 Strontium T 14000 ug/I 216 349 357 153 168 353 354 Sulfate N 250000 ug/I 37100 110000 112000 19500 19500 99100 98600 Buck Steam Station CSA Supplement 2 Table 3-3: Round 5 Analytical Results of Surface Water Locations Location: Date: Sample Type: Sample Name: SW-AB1 4/6/2016 N BU-SW-AB1 SW-A132 4/6/2016 N BU-SW-AB2 SW-AB3 4/6/2016 N BU-SW-AB3 SW-AB4 4/6/2016 N BU-SW-AB4 SW-AB5 4/6/2016 N BU-SW-AB5 SW-AB6 4/6/2016 N BU-SW-AB6 SW-AB7 4/6/2016 N BU-SW-AB7 Constituent Fraction NCDEQ 02B SWQS (Class B - Water Supply) Unit Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 0.11 1 U 1 U 0.081 J 0.056 J 1 U 1 U Thallium T 0.24 ug/I 0.094 J 1 U 1 U 0.093 J 0.37 1 U 1 U Total Dissolved Solids N 500000 ug/I 126000 J 385000 403000 103000 95000 280000 J 301000 Total Organic Carbon N -- ug/I 6900 13100 14800 J 6700 6600 8200 8400 Total Suspended Solids N -- ug/I 2600 U 19400 49600 17000 220000 J 53200 13700 Vanadium D -- ug/I 1.4 9.9 10.3 1.8 2.1 11.2 9.8 Vanadium T -- ug/I 2.3 11 11.5 4 18.7 12.7 11.3 Zinc D 36 ug/I 10 U 3.7 J 2.9 J 13.5 6.8 J 10 U 2.8 J Zinc T -- ug/I 3.4J 4.9J 5.7J 10U 14.6 5.9J 5J Dissolved Oxygen N -- mg/I 7.2 10 8.6 6.2 6.2 8.3 8.1 Oxidation Reduction Potential N -- mV 106 123 114 152 146 144 134 pH N 6.0 - 9.0 SU 7.3 9 9.1 7.3 7.5 8.7 8.9 Specific Conductivity N -- PS/cm 253.6 659 659 181 196 524 521 Temperature N -- Deg C 18.3 16.4 16.2 14.1 12.4 15.3 15.4 Turbidity, field N -- NTU 3.4 21.6 24.5 8.2 40.2 14 13.4 Notes: lam = micron lag/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station CSA Supplement 2 Table 3-4: Round 5 Analytical Results of AOW Location: Date: Sample Type: Sample Name: CULVERT 4/6/2016 N BU-CULVERT DISCHARGE S-1 4/6/2016 N BU-Si S-10 4/6/2016 N BU-S-10 S-2 4/6/2016 N BU-S2 S-3 4/6/2016 FD BU-FD-S3 S-3 4/6/2016 N BU-S3 S-4 4/6/2016 N BU-S4 S-5 4/6/2016 N BU-S-5 S-6 4/6/2016 N BU-S6 S-7 4/6/2016 N BU-S-7 Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit T Alkalinity, CO3 N ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 N ug/I 60700 52400 63000 48100 51000 51800 38800 53000 41000 41300 Alkalinity, lab N ug/I 60700 52400 63000 48100 51000 51800 38800 53000 41000 41300 Aluminum D ug/I 100 U 51.6 J 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Aluminum T ug/I 100 U 187 100 U 96.1 J 94.6 J 95.8 J 192 385 100 U 100 U Antimony D -- ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 5 U 0.5 U Antimony T 1 IMAC ug/I 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 5 U 0.5 U Arsenic D -- ug/I 0.15 0.17 0.1 U 0.12 0.11 0.12 0.057 J 0.086 J 1 U 0.099 J Arsenic T 10 02L ug/I 0.19 0.2 0.041 J 0.14 0.13 0.15 0.095 J 0.26 1 U 0.15 Barium D -- ug/I 37.6 79.8 27.6 21.4 36.8 36.7 30.9 33.6 45 16.6 Barium T 700 02L ug/I 38.2 87.8 29.3 23.4 40 39.3 33.8 38.4 46.2 17.4 Beryllium D -- ug/I 0.1 U 0.1 U 0.015 J 0.077 J 0.1 U 0.018 J 0.1 U 0.1 U 1 U 0.1 U Beryllium T 4 IMAC ug/I 0.1 U 0.012 J 0.16 J+ 0.017 J 0.1 U 0.1 U 0.022 J 0.036 J+ 1 U 0.1 U Boron D -- ug/I 563 126 50 U 50 U 39.9 J 40.2 J 231 579 50 U 50 U Boron T 700 02L ug/I 550 127 50 U 50 U 41.2 J 41 J 237 578 50 U 50 U Cadmium D -- ug/I 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.8 U 0.08 U Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.8 U 0.08 U Calcium T -- ug/I 16300 9620 11800 8940 9700 9840 16300 16400 59700 10200 Chloride N 250000 02L ug/I 11600 9600 4000 5000 6300 6300 24300 11600 6100 4100 Chromium D -- ug/I 0.18 J 0.51 3.8 0.66 0.46 J 0.39 J 0.38 J 0.49 J 1.2 J+ 0.28 J Chromium T 10 02L ug/I 0.41 J+ 0.41 J+ 3.9 J+ 0.99 J+ 0.49 J+ 0.44 J+ 0.49 J+ 0.72 J+ 1.5 J+ 0.69 J+ Chromium 6+ T 0.07 DHHS ug/I 0.023 J 0.03 U 3.1 0.13 J+ 0.015 J+ 0.027 J+ 0.16 J+ 0.03 U 1 J+ 0.03 U Cobalt D -- ug/I 3 4.2 0.022 J 0.65 1.1 1 0.17 3.5 1 U 0.93 Cobalt T 1 IMAC ug/I 2.9 5 0.074 J+ 0.83 1.2 1.2 0.31 5.1 1 U 0.96 Copper D -- ug/I 0.82 3.7 0.74 0.6 0.42 J 0.47 J 0.88 0.57 5 U 1.3 Copper T 1000 02L ug/I 0.25 J+ 0.48 J 0.83 J+ 0.72 0.63 0.69 0.5 1.1 J+ 5 U 1.3 J+ Iron D -- ug/I 50 U 907 50 U 224 376 391 36.1 J 288 50 U 141 Iron T 300 02L ug/I 43 J 1680 60.3 540 629 622 412 1570 47.6 J 395 Lead D -- ug/I 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 1U 0.1U Lead T 15 02L ug/I 0.1 U 0.2 0.1 U 0.096 J 0.1 U 0.1 U 0.19 0.37 1 U 0.1 U Magnesium T -- ug/I 16000 7090 6780 5090 5700 5690 7080 12900 23800 4940 Manganese D -- ug/I 457 1610 5 U 42.2 219 220 11.7 308 3.4 J 110 Manganese T 50 02L ug/I 480 1850 5 U 48.8 251 247 17.5 400 4 J 120 Mercury T 1 02L ug/I 0.00116 J+ 0.000989 J+ 0.00214 J+ 0.0012 J+ 0.000874 J+ 0.00122 J+ 0.00271 J+ 0.00155 J+ 0.00178 J+ 0.000645 J+ Methane N -- ug/I 3.2 J+ 34 1.6 J+ 17.4 15.5 J 8.3 J+ 1.5 J+ 4.6 J+ 2.4 J+ 1.6 J+ Molybdenum D ug/I 0.34 J 0.5 U 0.5 U 0.2 J+ 0.21 J+ 0.2 J+ 0.18 J 0.22 J 5 U 3.8 Molybdenum T ug/I 0.3 J 0.5 U 0.5 U 0.3 J 0.23 J 0.24 J 0.15 J 0.24 J 5 U 3.6 Nickel D -- ug/I 1.8 0.55 1.7 0.96 0.52 0.59 1.5 1.7 5 U 1 Nickel T 100 02L ug/I 1.8 J+ 0.5 U 1.9 J+ 0.99 0.56 0.53 1.4 1.6 J+ 5 U 0.68 J+ Nitrogen, NO2 plus NO3 N -- ug/I 180 35 270 1200 570 570 20 U 110 630 430 Potassium T ug/I 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 2670 J 5000 U Selenium D -- ug/I 0.5U 0.5U 0.5U 0.5U 0.5U 0.5U 0.5U 0.5U 5U 0.5U Selenium T 20 02L ug/I 0.5 U 0.47 J 0.5 U 0.5 U 0.5 U 0.33 J 0.44 J 0.4 J 5 U 0.5 U Sodium T -- ug/I 15200 8040 5920 6090 6910 6980 14400 14300 10800 3680 J Strontium D ug/I 134 110 92 85.2 96.1 95.3 180 158 382 77.2 Strontium T -- ug/I 138 113 101 94.1 107 104 200 169 413 80.8 Sulfate N 250000 02L ug/I 64400 12000 4400 2000 5200 5200 35500 62000 227000 6400 Sulfide N -- ug/I 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Thallium D -- ug/I 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 1U 0.1U Thallium T 0.2 IMAC ug/I 0.016 J 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 1 U 0.1 U Total Dissolved Solids N 500000 02L ug/I 155000 111000 91000 91000 114000 109000 156000 136000 408000 67000 J Total Organic Carbon N -- ug/I 1000 U 1300 1000 U 1400 1000 1000 1000 U 1000 U 1000 U 1000 U Total Suspended Solids N ug/I 2500 U 6000 2500 U 3300 2800 J 5000 UJ 12900 17200 2600 U 2600 U Vanadium D -- ug/I 0.24 J 0.47 J+ 4.6 2.2 1.6 1.6 2.9 0.22 J 2.1 J 0.18 J Vanadium T 0.3 IMAC ug/I 0.26 J 1.1 4.5 3.2 2.3 2.3 4 2.9 2.8 J 0.19 J Zinc D -- ug/I 3J 3.4J 2.8J 10U 10U 3.2J 3.3J 2.9J 5.4J 76.4 Zinc T 1000 02L ug/I 10 U 10 U 10 U 101.1 IOU 10 U 10 U 3.3 J 5.6 J 88.8 Dissolved Oxygen N -- mg/I 7.6 7.3 3 8.6 3.9 3.9 8.2 10.2 4.5 6.8 Oxidation Reduction Potential N mV 35.5 55.1 130.2 6.4 104 0.9 73.4 61 110.1 38.6 pH N 6.5 - 8.5 02L SU 6.9 6.7 6.4 7.2 7.3 7.3 6.7 6.3 6.3 7.1 Specific Conductivity N PS/cm 285.4 372.1 143.6 128.8 141.8 141.8 248.3 282.6 546.3 119.7 Temperature N Deg C 12.7 7.7 16.3 7.9 7.7 7.7 13 12.3 14.5 11.1 Turbidity, field N NTU 2.4 9.8 1.7 8.2 3.9 3.9 8.4 14.6 1 5.2 Buck Steam Station CSA Supplement 2 Table 3-4: Round 5 Analytical Results of AOW Location: CULVERT S-1 S-10 S-2 S-3 S-3 S-4 S-5 S-6 S-7 Date: 4/6/2016 4/6/2016 4/6/2016 4/6/2016 4/6/2016 4/6/2016 4/6/2016 4/6/2016 4/6/2016 4/6/2016 Sample Type: N N N N FD N N N N N Sample Name: BU-CULVERT DISCHARGE BU-Si BU-S-10 BU-S2 13U-FD-S3 BU-S3 BU-S4 BU-S-5 BU-S6 BU-S-7 NCDEQ 02L GWQS, Constituent Fraction GWQS Source Unit IMAC, or DHHS Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station CSA Supplement 2 Table 3-4: Round 5 Analytical Results of AOW Location: Date: Sample Type: Sample Name: S-8 4/6/2016 N BU-S-8 S-9 4/6/2016 N BU-S-9 TERRACOTA 1 4/6/2016 N BU-TERRACOTTA PIPE #1 Constituent Fraction NCDEQ 02L GWQS, IMAC, or DHHS GWQS Source Unit Alkalinity, CO3 N ug/1 5000 U 5000 U 5000 U Alkalinity, HCO3 N ug/I 24100 89900 20800 Alkalinity, lab N ug/I 24100 89900 20800 Aluminum D ug/I 100 U 100 U 100 U Aluminum T ug/I 134 51.6 J 100 U Antimony D -- ug/I 0.5 U 0.5 U 0.5 U Antimony T 1 IMAC ug/I 0.1 J 0.5 U 0.5 U Arsenic D -- ug/I 0.11 0.14 0.087 J Arsenic T 10 02L ug/I 0.17 0.16 0.11 Barium D -- ug/I 27.4 33.4 59.2 Barium T 700 02L ug/I 29.1 34.2 61.2 Beryllium D -- ug/I 0.1 U 0.1 U 0.052 J Beryllium T 4 IMAC ug/I 0.1 U 0.083 J+ 0.079 J+ Boron D -- ug/I 267 730 1110 Boron T 700 02L ug/I 270 733 1110 Cadmium D -- ug/I 0.08 U 0.08 U 0.08 U Cadmium T 2 02L ug/I 0.08 U 0.08 U 0.08 U Calcium T -- ug/I 21300 27800 24500 Chloride N 250000 02L ug/I 17100 14400 16100 Chromium D -- ug/I 0.19 J 0.39 J 0.18 J Chromium T 10 02L ug/I 0.66 J+ 1.3 J+ 0.15 J+ Chromium 6+ T 0.07 DHHS ug/I 0.03 U 0.16 0.03 U Cobalt D -- ug/I 4.8 0.52 14.1 Cobalt T 1 IMAC ug/I 5.2 0.52 14.9 Copper D -- ug/I 1 2 2.7 Copper T 1000 02L ug/I 1.3 J+ 1.8 J+ 2.1 Iron D -- ug/I 268 113 30.7 J Iron T 300 02L ug/I 631 263 45.1 J Lead D -- ug/I 0.1 U 0.1 U 0.9 Lead T 15 02L ug/I 0.32 0.097 J 1.3 Magnesium T -- ug/I 11200 14800 12100 Manganese D -- ug/I 1020 183 1470 Manganese T 50 02L ug/I 1100 196 1580 Mercury T 1 02L ug/I 0.00338 0.00134 J+ 0.00147 J+ Methane N -- ug/I 10 U 2.8 J+ 1.6 J+ Molybdenum D ug/I 5.2 10.5 4.5 Molybdenum T ug/I 4.9 9.2 5 Nickel D -- ug/I 1.7 7 1.8 Nickel T 100 02L ug/I 1.9 J+ 6 J+ 1.8 J+ Nitrogen, NO2 plus NO3 N -- ug/I 37 290 100 Potassium T ug/I 5000 U 5000 U 5000 U Selenium D -- ug/I 0.5 U 0.33 J 0.5 U Selenium T 20 02L ug/I 0.53 0.32 J 0.42 J Sodium T -- ug/I 12700 10600 11800 Strontium D ug/I 145 204 145 Strontium T -- ug/I 153 214 155 Sulfate N 250000 02L ug/I 89800 50100 100000 Sulfide N -- ug/I 100 U 100 U 100 U Thallium D -- ug/I 0.1 U 0.1 U 0.1 U Thallium T 0.2 IMAC ug/I 0.018 J 0.027 J 0.1 U Total Dissolved Solids N 500000 02L ug/I 175000 187000 180000 Total Organic Carbon N -- ug/I 730 J 1000 U 1000 U Total Suspended Solids N ug/I 12800 5000 U 2500 U Vanadium D -- ug/I 0.46 5.1 0.11 J Vanadium T 0.3 IMAC ug/I 1.3 5.4 0.12 J Zinc D -- ug/I 27.4 3.7 J 4.1 J Zinc T 1000 02L ug/I 29 3.4 J 4.2 J Dissolved Oxygen N -- mg/I 5.6 7.5 6.1 Oxidation Reduction Potential N mV 51.5 10.7 193.6 pH N 6.5 - 8.5 02L SU 6.6 7.1 6.2 Specific Conductivity N PS/cm 293.7 316 317.4 Temperature N Deg C 11.3 13.5 12.7 Turbidity, field N NTU 16 5.6 2.9 Buck Steam Station CSA Supplement 2 Table 3-4: Round 5 Analytical Results of AOW Location: S-8 S-9 TERRACOTA 1 Date: 4/6/2016 4/6/2016 4/6/2016 Sample Type: N N N Sample Name: BU-S-8 BU-S-9 BU-TERRACOTTA PIPE #1 NCDEQ 02 GWQS, Constituent Fraction GWQS Source Unit _ r DHHS IMAC, or Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Buck Steam Station CSA Supplement 2 Table 3-5. Buck Groundwater Elevation Table Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation AB-10D 7/1/2015 712.78 50.54 662.24 -- -- -- 06/17/16 49.60 663.18 AB-10S 7/1/2015 712.48 31.54 680.94 -- -- -- 06/17/16 30.58 681.90 AB-1D 7/1/2015 708.45 16.67 691.78 9/21/2015 17.65 690.80 06/17/16 15.11 693.34 AB-2BR 7/1/2015 708.05 11.01 697.04 9/21/2015 11.51 696.54 06/17/16 9.43 698.62 AB-2D 7/1/2015 707.97 10.96 697.01 9/21/2015 11.64 696.33 06/17/16 9.36 698.61 AB-2S 7/1/2015 708.03 10.25 697.78 9/21/2015 11.05 696.98 06/17/16 8.55 699.48 AB-2SL 7/1/2015 708.06 10.01 698.05 9/21/2015 10.63 697.43 06/17/16 8.62 699.44 AB-3D 7/1/2015 707.05 8.95 698.10 9/21/2015 9.70 697.35 06/17/16 6.98 700.07 AB-3S 7/1/2015 706.93 8.53 698.40 9/21/2015 9.20 697.73 06/17/16 6.64 700.29 AB-4BR 7/1/2015 686.90 7.19 679.71 9/21/2015 7.65 679.25 06/17/16 6.61 680.29 AB-4BRU 7/1/2015 687.48 6.65 680.83 9/21/2015 6.90 680.58 06/17/16 6.01 681.47 AB-4S 7/1/2015 688.03 7.13 680.90 9/21/2015 7.30 680.73 06/17/16 6.34 681.69 AB-4SL 7/1/2015 687.34 7.33 680.01 9/21/2015 7.50 679.84 06/17/16 6.56 680.78 AB-5BRU 7/1/2015 686.92 DRY DRY 9/21/2015 110.24 576.68 06/17/16 109.55 577.37 AB-5S 7/1/2015 687.05 12.70 674.35 9/21/2015 13.33 673.72 06/17/16 11.81 675.24 AB-5SL 7/1/2015 687.19 12.82 674.37 9/21/2015 13.65 673.54 06/17/161 12.09 675.10 Buck Steam Staion Page 1 of 7 CSA Supplement 2 Table 3-5. Buck Groundwater Elevation Table Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation AB-6BRU 7/1/2015 688.15 14.55 673.60 9/21/2015 15.41 672.74 06/17/16 13.76 674.39 AB-7BRU 7/1/2015 683.74 16.99 666.75 -- -- -- 06/17/16 16.53 667.21 AB-7S 7/1/2015 683.60 10.61 672.99 -- -- -- 06/17/16 10.23 673.37 AB-7SL 7/1/2015 683.30 10.42 672.88 -- -- -- 06/17/16 9.80 673.50 AB-8D 7/1/2015 677.40 4.41 672.99 -- -- -- 06/17/16 3.89 673.51 AB-8S 7/1/2015 677.92 5.34 672.58 -- -- -- 06/17/16 5.05 672.87 AB-9BR 7/1/2015 692.31 38.20 654.11 -- -- -- 06/17/16 52.48 639.83 AB-9BRU 7/1/2015 692.43 83.01 609.42 -- -- -- 06/17/16 45.61 646.82 AB-9S 7/1/2015 691.94 24.71 667.23 -- -- -- 06/17/16 23.10 668.84 AS-1D 7/1/2015 743.62 50.45 693.17 -- -- -- 06/17/16 48.37 695.25 AS-1S 7/1/2015 743.23 49.71 693.52 -- -- -- 06/17/16 47.43 695.80 AS-2D 7/1/2015 738.40 44.57 693.83 9/21/2015 43.74 694.66 06/17/16 42.59 695.81 AS-3D 7/1/2015 730.95 34.01 696.94 9/21/2015 34.87 696.08 06/17/16 32.10 698.85 AS-3S 7/1/2015 731.60 35.49 696.11 9/21/2015 36.43 695.17 06/17/16 33.48 698.12 BG-1BR 7/1/2015 725.84 DRY -- -- -- -- 06/17/16 118.71 607.13 BG-1D 7/1/2015 725.94 24.71 701.23 9/21/2015 27.94 698.00 06/17/161 20.57 705.37 Buck Steam Staion Page 2 of 7 CSA Supplement 2 Table 3-5. Buck Groundwater Elevation Table Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation BG-1S 7/1/2015 725.30 21.14 704.16 9/21/2015 27.36 697.94 06/17/16 19.94 705.36 BG-2D 7/1/2015 729.95 26.30 703.65 9/21/2015 28.48 701.47 06/17/16 22.46 707.49 BG-2S 7/1/2015 729.66 25.97 703.69 9/21/2015 28.14 701.52 06/17/16 22.02 707.64 BG-3BRU 7/1/2015 722.43 34.48 687.95 9/21/2015 36.71 685.72 06/17/16 33.47 688.96 BG-3S 7/1/2015 722.49 34.68 687.81 9/21/2015 36.92 685.57 06/17/16 30.52 691.97 GWA-10D 7/1/2015 664.28 13.05 651.23 9/21/2015 14.40 649.88 06/17/16 11.28 653.00 GWA-10S 7/1/2015 663.76 313.92 349.84 9/21/2015 15.43 648.33 06/17/16 12.25 651.51 GWA-11D 7/1/2015 701.90 30.21 671.69 9/21/2015 31.58 670.32 06/17/16 28.09 673.81 GWA-11S 7/1/2015 701.11 28.61 672.50 9/21/2015 30.62 670.49 06/17/16 25.99 675.12 GWA-12BRU 7/1/2015 649.64 22.97 626.67 9/21/2015 24.04 625.60 06/17/16 21.29 628.35 GWA-12S 7/1/2015 650.43 23.90 626.53 9/21/2015 24.89 625.54 06/17/16 22.09 628.34 GWA-13D 7/1/2015 718.50 -- -- -- -- -- 06/17/16 32.42 686.08 GWA-13SR 7/1/2015 718.58 -- -- -- -- -- 06/17/16 32.44 686.14 GWA-14D 7/1/2015 692.47 -- -- -- -- -- 06/17/16 14.33 678.14 GWA-14S 7/1/2015 692.59 -- -- -- -- -- 06/17/16 9.34 683.25 GWA-15D 7/1/2015 692.32 -- -- -- -- -- 06/17/16 9.02 683.30 Buck Steam Staion Page 3 of 7 CSA Supplement 2 Table 3-5. Buck Groundwater Elevation Table Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation GWA-15S 7/1/2015 692.45 -- -- -- -- -- 06/17/16 8.53 683.92 GWA-17S 7/1/2015 667.89 -- -- -- -- -- 06/17/16 34.90 632.99 GWA-18D 7/1/2015 699.37 -- -- -- -- -- 06/17/16 122.16 577.21 GWA-18S 7/1/2015 699.92 -- -- -- -- -- 06/17/16 60.04 639.88 GWA-19D 7/1/2015 678.20 -- -- -- -- -- 06/17/16 22.57 655.63 GWA-19S 7/1/2015 677.59 -- -- -- -- -- 06/17/16 20.21 657.38 GWA-1D 7/1/2015 710.18 10.28 699.90 9/21/2015 13.57 696.61 06/17/16 6.41 703.77 GWA-1S 7/1/2015 709.36 10.92 698.44 9/21/2015 13.42 695.94 06/17/16 6.31 703.05 GWA-20D 7/1/2015 644.28 -- -- -- -- -- 06/17/16 7.83 636.45 GWA-20S 7/1/2015 644.67 -- -- -- -- -- 06/17/16 8.18 636.49 GWA-22D 7/1/2015 638.33 7.62 630.71 9/21/2015 7.61 630.72 06/17/16 7.11 631.22 GWA-2BR 7/1/2015 702.81 25.70 677.11 9/21/2015 26.15 676.66 06/17/16 24.77 678.04 GWA-2BRU 7/1/2015 702.20 24.21 677.99 9/21/2015 24.69 677.51 06/17/16 23.37 678.83 GWA-2S 7/1/2015 702.93 -- -- -- -- -- 06/17/16 24.34 678.59 GWA-3BR 7/1/2015 634.27 Artesian 634.27 9/21/2015 Artesian 634.27 06/17/16 Artesian 634.27 GWA-3BRU 7/1/2015 636.37 9.63 626.74 9/21/2015 10.34 626.03 06/17/16 8.75 627.62 Buck Steam Staion Page 4 of 7 CSA Supplement 2 Table 3-5. Buck Groundwater Elevation Table Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation GWA-3S 7/1/2015 635.98 11.33 624.65 9/21/2015 12.15 623.83 06/17/16 10.63 625.35 GWA-4D 7/1/2015 676.16 37.46 638.70 9/21/2015 39.13 637.03 06/17/16 34.85 641.31 GWA-4S 7/1/2015 676.29 33.91 642.38 9/21/2015 35.60 640.69 06/17/16 30.79 645.50 GWA-5BRU 7/1/2015 663.83 33.39 630.44 9/21/2015 25.04 638.79 06/17/16 31.14 632.69 GWA-5S 7/1/2015 663.78 38.61 625.17 9/21/2015 40.56 623.22 06/17/16 35.89 627.89 GWA-6BR 7/1/2015 687.51 41.97 645.54 9/21/2015 42.57 644.94 06/17/16 41.10 646.41 GWA-6BRU 7/1/2015 687.45 42.14 645.31 9/21/2015 42.80 644.65 06/17/16 41.30 646.15 GWA-6S 7/1/2015 687.74 42.61 645.13 9/21/2015 43.31 644.43 06/17/16 41.76 645.98 GWA-7D 7/1/2015 715.49 67.96 647.53 9/21/2015 68.55 646.94 06/17/16 66.89 648.60 GWA-7S 7/1/2015 715.70 68.18 647.52 9/21/2015 68.76 646.94 06/17/16 67.10 648.60 GWA-8D 7/1/2015 717.28 31.76 685.52 9/21/2015 35.44 681.84 06/17/16 33.05 684.23 GWA-9BR 7/1/2015 692.81 29.28 663.53 9/21/2015 29.53 663.28 06/17/16 28.83 663.98 GWA-9D 7/1/2015 693.14 28.20 664.94 9/21/2015 28.48 664.66 06/17/16 27.46 665.68 GWA-9S 7/1/2015 693.24 26.35 666.89 9/21/2015 26.60 666.64 06/17/16 25.55 667.69 MW-1D 7/1/2015 654.85 -- -- 9/21/2015 4.99 649.86 06/17/16 3.87 650.98 MW-1S 7/1/2015 655.35 -- -- 9/21/2015 5.49 649.86 06/17/161 4.331 651.02 Buck Steam Staion Page 5 of 7 CSA Supplement 2 Table 3-5. Buck Groundwater Elevation Table Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation MW-3D 7/1/2015 652.27 5.56 646.71 9/21/2015 6.41 645.86 06/17/16 4.38 647.89 MW-3S 7/1/2015 652.77 4.75 648.02 9/21/2015 5.46 647.31 06/17/16 3.92 648.85 MW-4D 7/1/2015 656.00 -- -- 9/21/2015 12.84 643.16 06/17/16 11.55 644.45 MW-4S 7/1/2015 655.72 -- -- 9/21/2015 9.28 646.44 06/17/16 7.97 647.75 MW-5D 7/1/2015 678.72 -- -- 9/21/2015 22.92 655.80 06/17/16 19.33 659.39 MW-5S 7/1/2015 678.43 -- -- 9/21/2015 22.88 655.55 06/17/16 19.31 659.12 MW-6BR 721.76 -- -- -- 06/17/16 23.56 698.20 MW-6D 7/1/2015 721.10 23.22 697.88 -- -- -- 06/17/16 20.74 700.36 MW-6S 7/1/2015 721.25 23.42 697.83 -- -- -- 06/17/16 20.28 700.97 MW-7D 7/1/2015 710.72 10.53 700.19 -- -- -- MW-7S 7/1/2015 710.62 11.39 699.23 -- -- -- MW-8D 7/1/2015 712.94 7.55 705.39 -- -- -- MW-8S 7/1/2015 713.19 8.50 704.69 -- -- -- M W-9 D 7/1/2015 638.51 7.63 630.88 9/21/2015 7.78 -- MW-9S 7/1/2015 638.78 7.34 631.44 9/21/2015 7.51 -- MW-10D 7/1/2015 682.27 37.55 644.72 -- -- -- Buck Steam Staion Page 6 of 7 CSA Supplement 2 Table 3-5. Buck Groundwater Elevation Table Well Identification Date Top of Casing (TOC) Depth to Water (DTW) Groundwater Elevation MW-11D 7/1/2015 636.94 12.65 624.29 -- -- -- MW-11S 7/1/2015 637.46 13.00 624.46 -- -- -- MW-12D 7/1/2015 681.19 7.80 673.39 -- -- -- MW-12S 7/1/2015 681.28 7.97 673.31 -- -- -- MW-13D 7/1/2015 696.76 14.31 682.45 -- -- -- Buck Steam Staion Page 7 of 7 CSA Supplement 2 Table 3-6: Summary of Cation -Anion Balance Differences Anions Cations Constituent: Molecular Weight (g/mol) Charge Equivalent Weight: Site Location Matrix Date Alkalinity, CO3 Alkalinity, HCO3 Chloride NitrogenO2 N , plus Sulfate Anions Calcium Magnesium Potassium Sodium Cations 1 Charge Balance (%) 60 61 35.5 62 96.1 40.1 24.3 39.1 23 2 1 1 1 2 2 2 1 1 30 61 35.5 62 48.05 1 20.05 12.15 39.1 23 Result eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L Buck 0 0 SW-AB1 Surface Water 4/6/2016 0 0 37.4 0.613 20.2 0.569 37.1 0.772 1.954 11.9 0.594 4.93 0.406 7.26 0.186 18.5 0.804 1.99 1% SW-AB2 Surface Water 4/6/2016 5.2 0.173 88.7 1.454 80.5 2.268 0.63 0.01 110 2.289 6.194 33.1 1.651 12.3 1.012 12.5 0.32 72.1 3.135 6.118 -1% SW-AB3 Surface Water 4/6/2016 9.9 0.33 80.7 1.323 80.5 2.268 0.58 0.009 112 2.331 6.261 33.3 1.661 12.2 1.004 12.6 0.322 72.3 3.143 6.13 -1% SW-AB4 Surface Water 4/6/2016 0 0 39.3 0.644 15.6 0.439 0.44 0.007 19.5 1 0.406 1.496 8.71 0.434 4.17 0.343 6.15 0.157 15.5 0.674 1.608 4% SW-AB5 Surface Water 4/6/2016 0 1 0 39.7 0.651 15.7 0.442 0 0 19.5 0.406 1.499 9.02 0.45 4.24 0.349 6.26 1 0.16 15.5 0.674 1.633 4% SW-AB6 Surface Water 4/6/2016 0 0 73 1.197 54.2 1.527 0.038 0.001 99.1 2.062 4.787 29.4 1.466 10.7 0.881 10.1 0.258 50.4 2.191 4.796 0% SW-AB7 Surface Water 4/6/2016 0 0 74.1 1.215 1 54 1.521 0.051 0.001 98.6 2.052 4.789 29.7 1.481 10.8 0.889 10.1 0.258 1 51.1 2.222 1 4.85 1% AB-10D Groundwater 4/4/2016 0 0 108 1.77 13 0.366 0 0 1 97.5 2.029 4.165 33.2 1.656 12 0.988 11.3 0.289 30.8 1.339 4.272 1 % AB-1 OS Groundwater 4/4/2016 0 0 9.5 0.156 8.7 0.245 0.3 0.005 2.7 0.056 0.462 4.08 0.203 1.88 0.155 0 0 4.17 0.181 0.539 8% AB-1 D Groundwater 4/4/2016 0 1 0 26.6 0.436 21.9 0.617 0.17 0.003 106 2.206 3.262 27.8 1.387 15.1 1.243 0 0 11.7 0.509 3.139 -2% AB-2BR Groundwater 4/4/2016 109 3.633 0 1 0 9.9 0.279 0.065 0.001 24.4 0.508 4.421 1 32.6 1.626 0.851 0.07 8.83 0.226 20 0.87 2.792 -23% AB-2D Groundwater 4/4/2016 0 0 152 2.492 7.9 0.223 0 0 31.2 0.649 3.364 39.6 1.975 9.41 0.774 4.13 0.106 15.4 0.67 1 3.525 2% AB-3D Groundwater 4/4/2016 0 0 57.4 0.941 2.5 0.07 0.54 0.009 1 4.1 0.085 1.105 10.9 0.544 3.1 0.255 0 0 10.6 0.461 1.26 7% AB-4BR Groundwater 4/4/2016 81.2 2.707 52 0.852 8.3 0.234 0.08 0.001 46.5 0.968 4.762 39.9 1.99 0.157 0.013 22.2 0.568 18.4 0.8 3.371 -17% AB-4BRU Groundwater 4/4/2016 0 1 0 138 2.262 5.9 0.166 0 0 56.6 1.178 3.606 42 2.095 8.28 0.681 8.12 0.208 22 0.957 3.941 4% AB-6BRU Groundwater 4/4/2016 0 0 154 1 2.525 6.1 0.172 0 0 61.8 1.286 3.983 1 39.9 1.99 8.87 0.73 20.4 1 0.522 23.8 1.035 4.277 4% AB-7BRU Groundwater 4/5/2016 0 0 39.5 0.648 5.5 0.155 0 0 68.9 1.434 2.237 20 0.998 2.84 0.234 27.2 0.696 13.1 1 0.57 2.498 6% AB-8D Groundwater 4/5/2016 0 0 182 2.984 7.4 0.208 0 0 1 7.8 0.162 3.354 40.2 2.005 11.8 0.971 10.4 0.266 15.8 0.687 3.929 8% AB-9BR Groundwater 4/5/2016 928 30.933 0 0 17 0.479 0 0 96.6 2.01 33.422 29.2 1.456 0.382 0.031 637 16.292 224 9.739 27.518 1 -10% AB-9D Groundwater 4/5/2016 382 1 12.733 23.8 0.39 12.2 0.344 0 0 98.1 2.042 15.509 22.9 1.142 5.99 0.493 269 6.88 74.1 3.222 11.737 -14% AB-9S Groundwater 4/5/2016 0 0 47.4 1 0.777 13 0.366 0 0 0.69 0.014 1.157 1 3.73 0.186 3.8 0.313 7.59 1 0.194 9.62 0.418 1.111 -2% AS-1 D Groundwater 4/4/2016 2.7 0.09 83.4 1.367 6 0.169 0.12 0.002 33.3 0.693 2.321 23.3 1.162 6.07 0.5 9.14 0.234 14.9 0.648 2.544 5% AS-1 S Groundwater 4/4/2016 0 0 0 0 12.5 0.352 0.46 0.007 627 13.049 13.408 71 3.541 52.3 1 4.305 27 0.691 48.3 2.1 1 10.637 -12% AS-2D Groundwater 4/4/2016 0 0 48 0.787 1.7 0.048 0.31 0.005 2.3 0.048 0.888 6.95 0.347 1.53 0.126 5.86 0.15 9.97 0.433 1.056 9% AS-31D Groundwater 4/4/2016 0 1 0 40.6 0.666 1.1 0.031 0.67 0.011 2.5 0.052 0.76 8.98 0.448 2.73 0.225 0 0 5.27 0.229 0.902 9% AS-3S Groundwater 4/4/2016 0 0 18.6 1 0.305 1.3 0.037 0.42 0.007 0.8 0.017 0.366 1 2.99 0.149 1.44 0.119 0 1 0 0 0 0.268 -15% BC-18 Groundwater 4/6/2016 0 0 11.7 0.192 1.4 0.039 0 0 0 0 0.231 0.497 0.025 1.45 0.119 0 0 0 0 0.144 -23% BG-1 D Groundwater 3/15/2016 136 4.533 0 0 15.5 0.437 0.25 0.004 72 1.498 6.472 24.4 1.217 0 1 0 50.6 1.294 53.7 2.335 1 4.846 -14% BG-1 S Groundwater 3/15/2016 0 0 41.9 0.687 3.6 0.101 0.21 0.003 9.5 0.198 0.989 9.38 0.468 4.18 0.344 0 0 6.71 0.292 1.104 5% BG-213 Groundwater 3/15/2016 0 1 0 69.3 1.136 4.9 0.138 1.1 0.018 13 0.271 1.563 13.4 0.668 3.93 0.323 8.13 0.208 16.5 0.717 1.916 10% BG-2S Groundwater 3/15/2016 0 0 16.5 1 0.27 6.1 0.172 0.015 0 1 0.88 0.018 0.46 1 3.23 0.161 2.57 0.212 0 1 0 3.36 0.146 0.519 6% BG-3D Groundwater 3/15/2016 0 0 56.5 0.926 1.7 0.048 0.28 0.005 12.7 0.264 1.243 11.1 0.554 2.82 0.232 4.5 0.115 9.8 1 0.426 1.327 3% BG-3S Groundwater 3/15/2016 0 0 6.1 0.1 0.86 0.024 0.36 0.006 0.66 0.014 0.144 1.16 0.058 0.503 1 0.041 0 0 0 0 0.099 -19% GWA-10D Groundwater 4/5/2016 6 0.2 146 2.393 8.7 0.245 0.24 0.004 4.9 0.102 2.944 21.6 1.077 12.9 1.062 14.2 0.363 16.5 0.717 3.219 4% GWA-10S Groundwater 4/5/2016 0 1 0 174 2.852 11.3 0.318 0.12 0.002 14.8 0.308 3.48 24.7 1.232 19.7 1.621 0 0 22.1 0.961 3.814 5% GWA-11 D Groundwater 4/5/2016 0 0 67.2 1.102 6.8 0.192 0.29 0.005 1 13.3 0.277 1 1.576 16.8 0.838 7.16 0.589 0 1 0 7.76 0.337 1.764 6% GWA-11 S Groundwater 4/5/2016 0 0 7.2 0.118 1.5 0.042 0 0 0 0 0.16 1.09 0.054 0.909 0.075 0 0 0 0 0.129 -11 GWA-12D Groundwater 4/5/2016 0 0 62.5 1.025 2.3 0.065 0.17 0.003 15.7 0.327 1.42 14.8 0.738 5.78 1 0.476 0 0 7.29 0.317 1.531 4% GWA-12S Groundwater 4/5/2016 0 0 62.3 1.021 1.6 0.045 0.1 0.002 289 6.015 7.083 70.4 3.511 41.1 3.383 0 0 6.7 0.291 7.185 1 % GWA-13D Groundwater 2/19/2016 45.6 1 1.52 73 1.197 3.5 0.099 0 0 11.3 0.235 3.051 1 35.6 1.776 3.84 0.316 4.42 0.113 10.1 0.439 1 2.644 -7% GWA-13SR Groundwater 4/27/2016 0 0 39.7 0.651 6.3 0.177 0 1 0 3.4 0.071 0.899 7.93 0.396 2.17 0.179 0 0 1 11.6 0.504 1.079 9% GWA-14D Groundwater 4/6/2016 920 30.667 318 5.213 6.7 0.189 0.73 0.012 2.5 0.052 36.133 256 12.768 0.065 0.005 262 6.701 192 8.348 27.822 -13% GWA-14S Groundwater 4/7/2016 0 0 16 0.262 11.2 0.315 1.3 0.021 0.85 0.018 0.616 3.09 0.154 1 2.52 1 0.207 0 0 8.23 0.358 0.719 8% GWA-15D Groundwater 4/6/2016 0 0 32.4 0.531 2 0.056 1.4 0.023 0.64 0.013 0.623 5.46 0.272 1 2.14 1 0.176 0 0 5.86 0.255 0.703 6% Buck Steam Station Page 1 of 3 CSA Supplement 2 Table 3-6: Summary of Cation -Anion Balance Differences Anions Cations Constituent: Molecular Weight (g/mol) Charge Equivalent Weight: Site Location Matrix Date Alkalinity, CO3 Alkalinity, HCO3 Chloride Nitrogen02 N , plus Sulfate Anions Calcium Magnesium Potassium Sodium Cations 1 Charge Balance (%) 60 61 35.5 62 96.1 40.1 24.3 39.1 23 2 1 1 1 2 2 2 1 1 30 61 35.5 62 1 48.05 1 20.05 12.15 39.1 23 Result eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L GWA-15S Groundwater 4/8/2016 0 0 13.4 0.22 7.3 0.206 1.7 0.027 1.9 0.04 0.493 2.97 0.148 0.993 0.082 0 0 8.71 0.379 0.609 11 % GWA-17S Groundwater 4/27/2016 0 0 83.6 1.37 6.7 0.189 0.18 0.003 4.7 0.098 1.66 15.7 0.783 7.38 0.607 5.39 0.138 11.2 0.487 2.015 10% GWA-18D Groundwater 4/5/2016 259 8.633 0 0 11.4 0.321 0.32 0.005 97.4 2.027 10.986 81.3 4.055 0 0 507 12.967 167 7.261 24.283 38% GWA-18S Groundwater 4/5/2016 0 0 80.9 1.326 7 0.197 0.13 0.002 181 3.767 5.292 59.8 2.983 18.3 1.506 4.93 0.126 17.6 0.765 5.38 1% GWA-19D Groundwater 2/23/2016 0 0 119 1.951 5.1 0.144 0.61 0.01 54.7 1.138 3.243 42.8 2.135 7.46 0.614 3 0.077 21.5 0.935 3.761 7% GWA-19S Groundwater 2/24/2016 0 0 28.4 0.466 7.1 0.2 0.27 0.004 21.7 0.452 1.122 8.4 0.419 4.45 0.366 3.31 0.085 14.3 0.622 1.492 14% GWA-1 D Groundwater 4/4/2016 0 0 75.1 1.231 2.6 0.073 1.5 0.024 7.4 0.154 1.482 20.9 1.042 3.91 0.322 0 0 8.97 0.39 1.754 8% GWA-1 S Groundwater 4/4/2016 0 1 0 56.5 0.926 4 0.113 0.56 0.009 2.1 1 0.044 1.092 8.32 0.415 7.09 0.584 0 0 6.79 0.295 1 1.294 8% GWA-20D Groundwater 2/26/2016 0 0 133 2.18 9.2 0.259 0.16 0.003 10.1 0.21 2.652 30.1 1.501 16.5 1.358 2.63 0.067 13.8 0.6 3.526 14% GWA-20S Groundwater 2/24/2016 0 0 39 0.639 7.8 0.22 0 0 10.5 0.219 1.078 10.8 0.539 6.72 0.553 0 0 6.04 0.263 1.355 11 % GWA-22D Groundwater 4/4/2016 0 0 82.2 1.348 7.6 0.214 0.3 0.005 38.2 0.795 2.362 26.5 1.322 8.59 0.707 0 0 11.3 0.491 2.52 3% GWA-2BR Groundwater 4/4/2016 121 4.033 226 3.705 4.4 0.124 0.52 0.008 13.8 0.287 8.157 114 5.686 0.396 0.033 15.6 1 0.399 15.8 0.687 6.805 -9% GWA-2BRU Groundwater 4/5/2016 0 1 0 58.8 0.964 2.5 0.07 0.8 0.013 1 1 0.021 1.068 8.22 0.41 1.98 0.163 9.57 0.245 8.9 0.387 1 1.205 6% GWA-2S Groundwater 2/17/2016 0 0 5.1 0.084 7.7 0.217 0.72 0.012 1.3 0.027 0.34 0.668 0.033 1.35 0.111 0 0 5.02 0.218 0.362 3% GWA-3BR Groundwater 4/5/2016 0 0 133 2.18 1 2.6 0.073 0 0 8 0.166 2.419 34.2 1.706 7.89 0.649 2.6 0.066 10.2 0.443 2.864 8% GWA-3BRU Groundwater 4/5/2016 0 0 146 2.393 7 0.197 0 0 46.1 0.959 3.549 35.3 1.761 6.95 0.572 4.11 0.105 39.9 1.735 4.173 8% GWA-3S Groundwater 4/5/2016 0 0 67.6 1.108 8 0.225 0.094 0.002 6.7 0.139 1.474 14.1 0.703 5.98 0.492 0 1 0 9.66 0.42 1.615 5% GWA-41D Groundwater 4/5/2016 0 1 0 59.9 0.982 18.9 0.532 0 0 1 23.9 0.497 2.011 19.5 0.973 6.92 0.57 2.5 0.064 11.1 1 0.483 2.09 2% GWA4S Groundwater 4/5/2016 0 0 44 0.721 17.8 0.501 0 0 24 0.499 1.721 16 0.798 5 0.412 0 0 14.6 0.635 1.845 3% GWA-5BRU Groundwater 4/5/2016 0 0 115 1.885 1 10.2 0.287 0.035 0.001 116 2.414 4.587 58.7 2.928 18.3 1 1.506 4.89 0.125 12.7 0.552 5.111 5% GWA-5S Groundwater 4/5/2016 0 0 24.9 0.408 1.3 0.037 3.1 0.05 1.2 0.025 0.52 5.89 0.294 2.51 0.207 0 0 6.18 0.269 0.77 19% GWA-6BR Groundwater 4/5/2016 0 0 127 2.082 11.7 0.33 0 0 519 1 10.801 13.213 199 9.925 26 2.14 8.82 0.226 31.6 1.374 1 13.665 2% GWA-6BRU Groundwater 4/5/2016 0 1 0 64.2 1.052 9.6 0.27 0.36 0.006 396 8.241 9.569 1 118 5.885 36.7 3.021 12.2 0.312 16.2 0.704 9.922 2% GWA-7D Groundwater 4/4/2016 0 0 80 1.311 2 0.056 0.17 0.003 74.1 1.542 2.912 32.6 1.626 1 7.35 0.605 2.91 0.074 16 0.696 3.001 2% GWA-7S Groundwater 4/4/2016 0 0 39.3 0.644 1 2 0.056 0.4 0.006 63.6 1.324 2.03 20.6 1.027 8.41 0.692 0 0 8.45 0.367 2.086 1 % GWA-81D Groundwater 4/4/2016 0 0 77.1 1.264 5.9 0.166 0.035 0.001 183 3.809 5.24 50.5 2.519 19.4 1.597 0 1 0 27.4 1.191 5.307 1 % GWA-9BR Groundwater 4/4/2016 0 0 97.3 1.595 23.4 0.659 0.013 0 195 4.058 6.312 46.5 2.319 14 1.152 60.5 1.547 28 1.217 1 6.235 -1 % GWA-91D Groundwater 4/4/2016 0 1 0 54.1 0.887 10 0.282 0 0 166 3.455 4.624 50.8 2.534 16.4 1.35 0 0 14.4 0.626 4.51 -1 % GWA-9S Groundwater 4/4/2016 0 0 3.7 1 0.061 30.5 0.859 0.068 0.001 152 3.163 4.084 32.9 1.641 15.6 1 1.284 3 0.077 19.4 0.843 3.845 -3% MW-1 D Groundwater 4/5/2016 0 0 193 3.164 18.7 0.527 0.85 0.014 22.3 0.464 4.169 44.6 2.224 21.9 1.802 0 0 9.68 0.421 4.447 3% MW-1 S Groundwater 4/5/2016 0 0 151 2.475 19.2 0.541 1.6 0.026 1 14.1 0.293 3.335 28.3 1.411 22.9 1.885 0 1 0 11.9 0.517 3.813 7% MW-313 Groundwater 4/5/2016 0 0 70.3 1.152 11.1 0.313 0 0 78.7 1.638 1 3.103 29.6 1.476 12.6 1.037 0 0 13.8 0.6 1 3.113 0% MW-3S Groundwater 4/5/2016 0 1 0 24 0.393 11.7 0.33 0 0 33.8 0.703 1.426 6.83 1 0.341 5.74 0.472 0 0 13 0.565 1.378 -2% MW-4D Groundwater 4/5/2016 0 0 57.2 1 0.938 8.6 0.242 0 0 20.5 0.427 1.607 13.9 0.693 6.56 1 0.54 0 0 11.2 0.487 1.72 3% MW-4S Groundwater 4/5/2016 0 0 57.8 0.948 25.1 0.707 0 1 0 33.2 0.691 2.346 14.1 0.703 11.7 0.963 0 0 16 0.696 2.362 0% MW-513 Groundwater 4/5/2016 0 0 61.7 1.011 25.8 0.727 0 0 44.4 1 0.924 2.662 22 1.097 10.9 0.897 2.8 0.072 14.6 0.635 2.701 1 % MW-5S Groundwater 4/5/2016 0 0 30.5 0.5 37.8 1.065 0.058 0.001 62.8 1.307 2.873 1 23.1 1.152 8.58 0.706 0 0 21 0.913 1 2.771 -2% MW-6BR Groundwater 2/19/2016 0 0 68.9 1.13 1.8 0.051 0.029 0 5.9 0.123 1.304 15.1 0.753 5.42 0.446 0 0 7.28 0.317 1.516 8% MW-6D Groundwater 3/28/2016 0 1 0 43.6 1 0.715 2.2 0.062 0.36 0.006 2.4 0.05 0.833 8.16 0.407 4.5 1 0.37 3.05 0.078 5.46 0.237 1.092 13% MW-6S Groundwater 3/28/2016 0 0 17.6 0.289 4.6 0.13 0.036 0.001 1 0 0 0.42 2.82 0.141 3.32 0.273 0 0 2.67 0.116 0.53 12% CULVERT AOW 4/6/2016 0 0 60.7 0.995 11.6 0.327 0.18 0.003 64.4 1.34 2.665 16.3 0.813 16 1.317 0 0 15.2 0.661 2.791 2% S-1 AOW 4/6/2016 0 0 52.4 0.859 9.6 0.27 0.035 0.001 12 0.25 1.38 1 9.62 0.48 7.09 0.584 0 0 8.04 0.35 1 1.414 1 % S-10 AOW 4/6/2016 0 0 1 63 1.033 4 0.113 0.27 0.004 4.4 0.092 1.242 11.8 0.589 6.78 0.558 0 0 5.92 0.257 1.404 6% S-2 AOW 4/6/20161 0 0 48.1 0.789 5 0.141 1.2 0.019 2 0.042 0.991 8.94 1 0.446 1 5.09 1 0.419 1 0 1 0 6.09 0.265 1.13 7% S-3 AOW 4/6/20161 0 0 1 51.8 0.849 6.3 0.177 0.57 0.009 5.2 1 0.108 1.143 9.84 0.491 1 5.69 1 0.468 0 0 6.98 0.303 1.262 1 5% Buck Steam Station Page 2 of 3 CSA Supplement 2 Table 3-6: Summary of Cation -Anion Balance Differences Anions Cations Constituent: Molecular Weight (g/mol) Charge Equivalent Weight: Site Location Matrix Date Alkalinity, CO3 Alkalinity, HCO3 Chloride Nitrogen02 N , plus Sulfate Anions Calcium Magnesium Potassium Sodium Cations 1 Charge Balance (%) 60 61 35.5 62 96.1 40.1 24.3 39.1 23 2 1 1 1 2 2 2 1 1 30 61 35.5 62 1 48.05 1 20.05 12.15 39.1 23 Result eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L Result eq/L Result eq/L Result eq/L Result eq/L eq/L S-4 AOW 4/6/2016 0 0 38.8 0.636 24.3 0.685 0 0 35.5 0.739 2.06 16.3 0.813 7.08 0.583 0 0 14.4 0.626 2.022 -1 % S-5 AOW 4/6/2016 0 0 53 0.869 11.6 0.327 0.11 0.002 62 1.29 2.488 16.4 0.818 12.9 1.062 0 0 14.3 0.622 2.502 0% S-6 AOW 4/6/2016 0 0 41 0.672 6.1 0.172 0.63 0.01 227 4.724 5.578 59.7 2.978 23.8 1.959 2.67 0.068 10.8 0.47 5.475 -1 %o S-7 AOW 4/6/2016 0 0 41.3 0.677 4.1 0.115 0.43 0.007 6.4 0.133 0.932 10.2 0.509 4.94 0.407 0 0 3.68 0.16 1.076 7% S-8 AOW 4/6/2016 0 0 24.1 0.395 17.1 0.482 0.037 0.001 89.8 1.869 2.747 21.3 1.062 11.2 0.922 0 0 12.7 0.552 2.536 -4% S-9 AOW 4/6/2016 0 0 89.9 1.474 14.4 0.406 0.29 0.005 50.1 1.043 2.928 27.8 1.387 14.8 1.218 0 0 10.6 0.461 3.066 2% TERRACOTA AOW 4/6/2016 0 0 20.8 0.341 16.1 0.454 0.1 0.002 100 2.081 2.878 24.5 1.222 12.1 0.996 0 0 11.8 0.513 2.731 -3% AB-2S Porewater 4/4/2016 0 0 226 3.705 41.4 1.166 0 0 123 2.56 7.431 61.6 3.072 14.6 1.202 20.6 0.527 59 2.565 7.366 0% AB-2SL Porewater 4/4/2016 0 0 131 2.148 59.2 1.668 0 0 166 3.455 7.271 73.6 3.671 11.4 0.938 27.3 0.698 41.6 1.809 7.116 -1 %o AB-3S Porewater 4/4/2016 0 0 351 5.754 36.6 1.031 0 0 167 3.476 10.261 111 5.536 24.4 2.008 25.9 0.662 58.3 2.535 10.741 2% AB-4S Porewater 4/4/2016 0 0 34.3 0.562 9.1 0.256 0 0 85.4 1.777 2.595 20.7 1.032 9.28 0.764 4.6 0.118 12.6 0.548 2.462 -3% AB-4SL Porewater 4/4/2016 11.2 0.373 46.8 0.767 11.1 0.313 0 0 185 3.85 5.303 72.9 3.636 7.42 0.611 12.8 0.327 7.07 0.307 4.881 -4% AB-5S Porewater 4/4/2016 0 0 194 3.18 20.9 0.589 0 0 95.7 1.992 5.761 73.2 3.651 13.5 1.111 6.79 0.174 21.1 0.917 5.853 1 % AB-5SL Porewater 4/4/2016 0 0 116 1.902 1.8 0.051 0 0 1.4 0.029 1.982 13.2 0.658 9.74 0.802 2.99 0.076 8.07 0.351 1.887 -2% AB-7S Porewater 4/5/2016 0 0 110 1.803 15 0.423 0 0 58.8 1.224 3.45 37.1 1.85 7.73 0.636 9.09 0.232 20.4 0.887 3.605 2% AB-7SL Porewater 4/5/2016 19.6 0.653 25.6 0.42 11.4 0.321 0.42 0.007 53.1 1.105 2.506 22.8 1.137 0.065 0.005 11.6 0.297 14.2 0.617 2.056 -10% AB-8S Porewater 4/5/2016 3.8 0.127 175 2.869 6.6 0.186 0 0 27.3 0.568 3.75 46.6 2.324 11.2 0.922 9.17 0.235 10.4 0.452 3.933 2% * NO2 + NO3 is being used as a surrogate for nitrate and the molecular weight of nitrate is assumed. Results of "0" are reported as non -detects by the analytical laboratory. Dataset consists of aqueous data associated with the first quarter of 2016 (even if dates do not align to traditional quarters). Formulas: Molecular Weight (mol) Result Value (Lg) Cations (eQ) - E Anions(eq) Equivalent Weight = eq/L = Molecular wt. CBE% = y ey x 100 Charge r (,nol)1 E Cations(L )+ Anions(i ) Charge J Buck Steam Station Page 3 of 3 CSA Supplement 2