Loading...
HomeMy WebLinkAboutNC0003468_2. DRSS CAP Part 2_Tables_FINAL_20160210 Tables Note: Additional tables are included within the CAP Part 2 Report. This page intentionally left blank Table 2-1 Summary of Horizontal Hydraulic Gradient Calculations Wells Groundwater Elevation Up-gradient Well (h2, msl) Groundwater Elevation Down-gradient Well (h1, msl) Flow Path Length (dl, ft) Horizontal Hydraulic Gradient (I, feet/foot) Shallow Wells GWA-1S / GWA-11S 569.14’ 540.04’ 1,220’ 0.024 GWA-7S / AB- 25S 525.58’ 495.48’ 1,070’ 0.028 GWA-8S / GWA-7S 568.01’ 525.58’ 1,570’ 0.027 GWA-12S / BG-5S 571.23’ 507.26’ 1,700’ 0.038 Average Horizontal Hydraulic Gradient 0.029 Deep Wells GWA-8D / BG- 5D 566.73’ 507.02’ 2,440’ 0.024 GWA-9D / GWA-10D 579.15’ 519.97’ 2,180’ 0.027 GWA-7D / AB- 25D 524.87’ 490.77’ 1,410’ 0.024 AS-4D / AB- 30D 544.15’ 490.52’ 1,370’ 0.039 Average Horizontal Hydraulic Gradient 0.029 Bedrock Wells AS-8BR / MW - 315BR 544.85’ 525.17’ 490’ 0.040 MW -310BR / MW -311BR 521.54’ 495.51’ 815’ 0.032 MW -303BR / AB-30BR 557.63’ 505.97’ 1,525’ 0.034 MW -314BR / MW -22BR 510.08’ 486.06’ 750’ 0.032 Average Horizontal Hydraulic Gradient 0.035 Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 11 Constituent CAS RN Fraction Unit 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) Aluminum 7429-90-5 D µg/L 100 U 270 ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA Antimony 7440-36-0 D µg/L 1.5 1.3 -14.29 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Arsenic 7440-38-2 D µg/L 0.41 J 0.42 J 2.41 0.25 J 0.25 J 0 0.78 0.77 -1.29 Barium 7440-39-3 D µg/L 310 500 46.91 26 26 0 110 110 0 Beryllium 7440-41-7 D µg/L 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA Boron 7440-42-8 D µg/L 240 210 -13.33 930 940 1.07 310 300 -3.28 Cadmium 7440-43-9 D µg/L 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA Chromium 7440-47-3 D µg/L 3.4 4.3 23.38 0.33 J+0.25 J+-27.59 0.21 J 0.19 J -10 Cobalt 7440-48-4 D µg/L 1.1 1.5 30.77 0.34 J+0.35 J+2.9 0.5 U 0.5 U ND/NA Copper 7440-50-8 D µg/L 5.3 1.2 -126.15 1.3 J+0.5 J+-88.89 1 U 1 U ND/NA Iron 7439-89-6 D µg/L 50 UJ 50 UJ ND/NA 50 U 50 U ND/NA 94 90 -4.35 Lead 7439-92-1 D µg/L 1 0.52 -63.16 0.13 J+0.049 J+-90.5 0.1 U 0.1 U ND/NA Manganese 7439-96-5 D µg/L 5 U 5 U ND/NA 510 500 -1.98 400 400 0 Mercury 7439-97-6 D µg/L 0.2 U 0.2 U ND/NA 0.2 UJ 0.2 UJ ND/NA 0.2 U 0.2 U ND/NA Molybdenum 7439-98-7 D µg/L 2.1 2.3 9.09 11.4 11.2 -1.77 2.9 2.8 -3.51 Nickel 7440-02-0 D µg/L 1.7 2 16.22 3 J+2.9 J+-3.39 0.85 0.82 -3.59 Selenium 7782-49-2 D µg/L 0.35 J 0.36 J 2.82 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D µg/L 3400 5000 38.1 160 160 0 870 870 0 Thallium 7440-28-0 D µg/L 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA Titanium 7440-32-6 D µg/L ND/NA ND/NA ND/NA Vanadium 7440-62-2 D µg/L 0.96 J 0.74 J -25.88 0.45 J 0.47 J 4.35 1 U 1 U ND/NA Zinc 7440-66-6 D µg/L 10 U 10 U ND/NA 27 J+26 J+-3.77 10 U 10 U ND/NA Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high AB-10D AB-25D AB-30BR Sample Location Sample Location Sample Location Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) 100 U 190 ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA 0.43 J 0.15 J -96.55 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.35 J 0.31 J -12.12 0.5 U 0.5 U ND/NA 9.3 9 -3.28 91 110 18.91 110 110 0 370 400 7.79 0.2 U 0.2 U ND/NA 0.44 0.43 -2.3 0.2 U 0.2 U ND/NA 290 300 3.39 320 320 0 220 210 -4.65 0.08 U 0.08 U ND/NA 0.064 J 0.084 27.03 0.08 U 0.08 U ND/NA 0.75 0.91 19.28 0.2 J 0.39 J 64.41 0.55 0.49 J -11.54 0.27 J 0.4 J 38.81 24.9 25.3 1.59 0.5 U 0.5 U ND/NA 0.57 J 0.42 J -30.3 0.98 J 0.42 J -80 1 U 1 U ND/NA 50 J 370 J+152.38 33 J 34 J 2.99 50 U 50 U ND/NA 0.1 0.11 9.52 0.39 0.097 J -120.33 0.1 U 0.1 U ND/NA 380 530 32.97 1400 1400 0 150 140 -6.9 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 1.3 0.74 -54.9 0.5 U 0.5 U ND/NA 21.3 19.9 -6.8 1.7 1.6 -6.06 7.8 7.8 0 0.77 0.82 J 6.29 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 420 470 11.24 150 150 0 730 760 4.03 0.1 U 0.1 U ND/NA 0.1 U 0.022 J ND/NA 0.1 U 0.1 U ND/NA ND/NA ND/NA ND/NA 0.57 J 0.56 J -1.77 1 U 1 U ND/NA 1.5 1.5 0 21 15 -33.33 58 66 12.9 10 U 10 U ND/NA AB-30D AB-30S AB-35BR Sample Location Sample Location Sample Location Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 3 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) 100 U 83 J ND/NA 100 U 100 U ND/NA 98 J 100 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U ND/NA 0.5 U 0.5 U ND/NA 14.1 14.6 3.48 0.23 J ND/NA 1.5 1.5 0 64 65 1.55 31 31 0 88 88 0 0.2 U 0.2 U ND/NA 0.2 U ND/NA 0.2 U 0.2 U ND/NA 630 630 0 1300 1300 0 800 800 0 0.08 U 0.08 U ND/NA 0.036 J ND/NA 0.08 U 0.08 U ND/NA 0.5 U 0.93 ND/NA 0.49 J ND/NA 0.19 J+0.46 J+83.08 5.4 5.7 5.41 1.2 ND/NA 2.7 2.6 -3.77 0.24 J 0.74 J 102.04 6.8 ND/NA 1 UJ 1 UJ ND/NA 1100 1100 0 370 420 12.66 170 150 -12.5 0.08 J 0.06 J -28.57 0.51 ND/NA 0.059 J+0.1 UJ ND/NA 1300 1300 0 330 340 2.99 770 780 1.29 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 4.4 4.6 4.44 0.59 ND/NA 7.6 7.3 -4.03 7 7.9 12.08 5.7 ND/NA 2.5 J+2.5 J+0 0.5 U 0.5 U ND/NA 0.5 U ND/NA 0.5 U 0.5 U ND/NA 470 480 2.11 700 700 0 970 950 -2.08 0.1 U 0.1 U ND/NA 0.1 U ND/NA 0.1 U 0.1 U ND/NA ND/NA ND/NA ND/NA 1 U 1 U ND/NA 0.32 J ND/NA 1 U 1 U ND/NA 10 U 2.7 J ND/NA 27 25 -7.69 10 UJ 10 UJ ND/NA AB-5D AS-12S AS-4D Sample Location Sample Location Sample Location Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 4 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) 100 U 100 U ND/NA 100 U 100 U ND/NA 100 U 130 ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.50 U 0.50 U ND/NA 0.5 U 0.14 J ND/NA 0.41 J 0.35 J -15.79 0.50 U 0.50 U ND/NA 77 77 0 69 69 0 19 20 5.13 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.20 U 0.20 U ND/NA 50 U 50 U ND/NA 50 U 50 U ND/NA 50 U 50 U ND/NA 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA 0.080 U 0.080 U ND/NA 0.3 J 0.35 J 15.38 0.54 0.5 U ND/NA 0.50 U 0.38 J ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.30 J 0.34 J 12.5 1 U 1 U ND/NA 1 U 1 U ND/NA 0.47 J 0.79 J 50.79 150 150 0 700 670 -4.38 220 260 16.67 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA 0.049 J 0.12 84.02 920 910 -1.09 1000 990 -1.01 540 540 0 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.20 U 0.20 U ND/NA 0.13 J 0.17 J 26.67 0.13 J 0.13 J 0 0.58 0.58 0 0.34 J 0.38 J 11.11 0.33 J 0.32 J -3.08 0.17 J 1.1 146.46 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.50 U 0.50 U ND/NA 380 380 0 310 320 3.17 270 270 0 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA 0.10 U 0.10 U ND/NA ND/NA ND/NA ND/NA 1 U 1 U ND/NA 1 U 1 U ND/NA 1.0 U 0.32 J ND/NA 10 U 10 U ND/NA 10 U 10 U ND/NA 3.1 J 10 U ND/NA AS-8BR AS-8D BG-5D Sample Location Sample Location Sample Location Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 5 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) 100 U 100 U ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA 0.50 U 0.50 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.50 U 0.50 U ND/NA 0.5 U 0.5 U ND/NA 0.28 J 0.28 J 0 12 12 0 32 34 6.06 55 56 J 1.8 0.20 U 0.20 U ND/NA 0.13 J 0.13 J 0 0.2 U 0.2 U ND/NA 50 U 50 U ND/NA 300 300 0 50 U 50 U ND/NA 0.080 U 0.080 U ND/NA 0.033 J 0.042 J 24 0.08 U 0.08 U ND/NA 0.29 J 0.42 J 36.62 2.2 1.5 -37.84 2.3 J+1.1 J+-70.59 0.50 U 2.8 ND/NA 0.71 0.6 -16.79 1.4 1.4 J 0 0.39 J 1.0 U ND/NA 1.2 0.82 J -37.62 4 1 U ND/NA 50 U 50 U ND/NA 64 52 -20.69 2200 2200 J 0 0.10 U 0.10 U ND/NA 0.16 0.12 -28.57 0.41 J+0.1 UJ ND/NA 20 19 -5.13 160 130 -20.69 890 900 J 1.12 0.20 U 0.20 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.50 U 0.50 U ND/NA 0.095 J 0.5 U ND/NA 1.1 0.87 J -23.35 0.42 J 0.39 J -7.41 8.8 7.7 -13.33 11.3 5.1 J+-75.61 0.50 U 0.50 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 230 230 0 360 370 2.74 450 450 0 0.10 U 0.10 U ND/NA 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA ND/NA ND/NA ND/NA 1.0 U 1.0 U ND/NA 0.29 J 0.28 J -3.51 1 U 1 U ND/NA 5.5 J 10 U ND/NA 45 30 -40 3.7 J+2.6 J+-34.92 BG-5S GWA-10D GWA-11D Sample Location Sample Location Sample Location Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 6 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) 100 U 100 U ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA 0.16 J 0.5 U ND/NA 0.9 0.54 -50 0.5 J 0.41 J -19.78 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 18 17 -5.71 7.7 7.8 1.29 6 6.1 1.65 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 110 120 8.7 50 U 50 U ND/NA 27 J 29 J 7.14 0.031 J 0.026 J -17.54 0.08 U 0.08 U ND/NA 0.062 J 0.045 J -31.78 3.7 2.7 -31.25 0.48 J 0.38 J -23.26 17.4 14.1 -20.95 3.6 3.5 -2.82 1.5 1.7 12.5 0.91 0.78 -15.38 0.38 J 0.58 J 41.67 2.4 0.4 J -142.86 2.6 J+1.1 J+-81.08 180 220 20 50 U 50 U ND/NA 220 200 -9.52 0.19 0.18 -5.41 0.27 0.1 U ND/NA 0.27 0.16 -51.16 880 820 -7.06 71 73 2.78 76 72 -5.41 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.3 J 0.25 J -18.18 0.5 U 0.5 U ND/NA 0.56 0.48 J -15.38 9.1 7.9 -14.12 2.1 2 -4.88 28.4 23.5 -18.88 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 190 200 5.13 35 35 0 160 170 6.06 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA ND/NA ND/NA ND/NA 1 U 0.32 J ND/NA 1 U 1 U ND/NA 1 U 1 U ND/NA 11 5.1 J -73.29 22 23 4.44 29 16 J+-57.78 GWA-11S GWA-1S Sample Location Sample Location GWA-3D Sample Location Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 7 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) 100 U 100 U ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.98 1 2.02 0.69 0.66 -4.44 0.5 U 0.5 U ND/NA 32 32 0 20 20 0 71 71 0 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.46 0.46 0 50 U 50 U ND/NA 50 U 50 U ND/NA 290 290 0 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA 0.046 J 0.042 J -9.09 1.1 0.69 -45.81 0.34 J 0.53 43.68 0.24 J 0.26 J 8 0.5 U 0.5 U ND/NA 0.36 J 0.4 J 10.53 33.9 32.8 -3.3 0.32 J 0.22 J -37.04 1.9 1 U ND/NA 2.5 1.7 -38.1 140 130 -7.41 1800 1800 0 50 U 50 U ND/NA 0.1 U 0.1 U ND/NA 0.13 0.1 U ND/NA 0.24 0.15 -46.15 1600 1600 0 690 690 0 930 930 0 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 2.4 2.4 0 0.12 J 0.12 J 0 0.5 U 0.5 U ND/NA 0.81 0.75 -7.69 0.98 1.2 20.18 6 6.3 4.88 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 730 740 1.36 52 52 0 64 63 -1.57 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA 0.1 U 0.017 J ND/NA ND/NA ND/NA ND/NA 0.41 J 0.4 J -2.47 1 U 1 U ND/NA 0.67 J 0.48 J -33.04 10 U 10 U ND/NA 10 U 10 U ND/NA 15 5.9 J -87.08 Sample Location Sample Location Sample Location GWA-8D GWA-9D MW-11 Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 8 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) 100 U 68 J ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA 0.5 U 0.5 U ND/NA 0.18 J 0.18 J 0 0.36 J 0.24 J -40 0.18 J 0.17 J -5.71 34.2 34.6 1.16 2.5 2.7 7.69 48 54 11.76 40 40 0 71 76 6.8 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 98 100 2.02 250 250 0 50 U 50 U ND/NA 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA 0.82 1.6 64.46 0.5 U 0.5 U ND/NA 0.28 J 0.5 U ND/NA 0.5 U 0.5 U ND/NA 1.1 1.1 0 0.13 J 0.15 J 14.29 10.9 1.1 -163.33 0.27 J 0.43 J 45.71 5.5 1.7 -105.56 50 U 50 U ND/NA 50 U 50 U ND/NA 2200 2600 16.67 1.3 0.05 J -185.19 0.1 U 0.1 U ND/NA 0.28 0.047 J -142.51 130 130 0 740 730 -1.36 530 580 9.01 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 3.6 3.8 5.41 19.7 20.4 3.49 2.1 1.5 -33.33 1.9 1.9 0 1.2 1.2 0 3 3.5 15.38 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 520 520 0 420 420 0 180 190 5.41 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA ND/NA ND/NA ND/NA 1 U 0.51 J ND/NA 0.41 J 0.41 J 0 0.28 J 1 U ND/NA 10 U 10 U ND/NA 10 U 10 U ND/NA 9 J+5.7 J+-44.9 Sample Location Sample Location Sample Location MW-11D MW-21S MW-303BR Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 9 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) 100 U 100 U ND/NA 100 U 150 ND/NA 100 U 100 U ND/NA 0.5 U 0.5 U ND/NA 1.4 1.3 -7.41 0.5 U 0.5 U ND/NA 0.9 0.93 3.28 2.7 2.7 0 0.18 J 0.18 J 0 140 140 0 33 33 0 59 60 1.68 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 1500 1500 0 49 J 43 J -13.04 50 U 50 U ND/NA 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA 0.29 J 0.25 J -14.81 0.63 1.2 62.3 0.19 J 0.22 J 14.63 1.2 1.2 0 0.5 U 0.5 U ND/NA 0.48 J 0.51 6.06 0.8 J+0.22 J+-113.73 0.36 J 0.78 J 73.68 1 U 0.82 J ND/NA 3100 3100 0 50 U 64 ND/NA 39 J 43 J 9.76 0.065 J 0.1 U ND/NA 0.058 J 0.39 148.21 0.11 0.052 J -71.6 2200 2200 0 8.2 16 64.46 1100 1100 0 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 4.5 4.8 6.45 3.4 3.3 -2.99 0.21 J 0.23 J 9.09 3.5 3.6 2.82 1.1 1.5 30.77 0.78 1.2 42.42 0.5 U 0.5 U ND/NA 0.39 J 0.35 J -10.81 0.5 U 0.5 U ND/NA 1200 1200 0 160 160 0 460 470 2.15 0.1 U 0.1 U ND/NA 0.1 U 0.017 J ND/NA 0.1 U 0.1 U ND/NA ND/NA ND/NA ND/NA 1 U 1 U ND/NA 4.9 4.7 -4.17 1 U 1 U ND/NA 19 J+7.2 J+-90.08 10 U 10 U ND/NA 2.8 J 3.6 J 25 Sample Location Sample Location Sample Location MW-306BR MW-310BR MW-315BR Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 10 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%)0.45 µm Result 0.1 µm Result RPD (%) 500 720 36.07 100 U 100 U ND/NA 100 U 100 U ND/NA 4.7 4.5 -4.35 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.42 J 0.49 J 15.38 1 1.1 9.52 737 727 -1.37 97 91 -6.38 34 32 -6.06 33 32 -3.08 0.2 U 0.2 U ND/NA 0.31 0.28 -10.17 0.2 U 0.2 U ND/NA 37 J 30 J -20.9 1300 1200 -8 390 390 0 0.08 U 0.08 U ND/NA 0.068 J 0.062 J -9.23 0.08 U 0.08 U ND/NA 13.4 14 4.38 0.38 J 0.52 31.11 0.25 J 0.3 J 18.18 0.37 J 0.39 J 5.26 6.6 8.1 20.41 0.15 J 0.15 J 0 2.6 3 14.29 2 J 0.66 J -100.75 1 U 4.9 ND/NA 50 U 61 ND/NA 490 710 36.67 35300 35500 0.56 0.28 0.39 32.84 0.36 0.22 J -48.28 0.1 U 0.1 U ND/NA 5 U 4 J ND/NA 390 530 30.43 670 700 4.38 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 5.7 5.6 -1.77 0.5 U 0.5 U ND/NA 1.6 1.6 0 0.76 1 27.27 10.7 11.1 3.67 0.57 0.67 16.13 0.89 0.8 -10.65 1.2 0.79 -41.21 0.5 U 0.5 U ND/NA 920 820 -11.49 650 620 -4.72 520 520 0 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA 0.075 J 0.073 J -2.7 ND/NA ND/NA ND/NA 5.8 6.1 5.04 1 U 1 U ND/NA 1 U 1 U ND/NA 3.4 J 10 U ND/NA 34 J 28 -19.35 10 U 10 U ND/NA Sample Location Sample Location Sample Location MW-317BR MW-318D OW-308D Table 2-2 Comparison of 0.45 µm and 0.1 µm Filter Sample Results - Groundwater Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 11 of 11 Constituent CAS RN Fraction Unit Aluminum 7429-90-5 D µg/L Antimony 7440-36-0 D µg/L Arsenic 7440-38-2 D µg/L Barium 7440-39-3 D µg/L Beryllium 7440-41-7 D µg/L Boron 7440-42-8 D µg/L Cadmium 7440-43-9 D µg/L Chromium 7440-47-3 D µg/L Cobalt 7440-48-4 D µg/L Copper 7440-50-8 D µg/L Iron 7439-89-6 D µg/L Lead 7439-92-1 D µg/L Manganese 7439-96-5 D µg/L Mercury 7439-97-6 D µg/L Molybdenum 7439-98-7 D µg/L Nickel 7440-02-0 D µg/L Selenium 7782-49-2 D µg/L Strontium 7440-24-6 D µg/L Thallium 7440-28-0 D µg/L Titanium 7440-32-6 D µg/L Vanadium 7440-62-2 D µg/L Zinc 7440-66-6 D µg/L Notes: = RPD greater than 20% µg/L = micrograms per liter µm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 0.45 µm Result 0.1 µm Result RPD (%) 100 U 130 ND/NA 0.28 J 0.32 J 13.33 777 818 5.14 380 380 0 0.2 U 0.2 U ND/NA 980 1000 2.02 0.08 U 0.08 U ND/NA 0.21 J 0.23 J 9.09 1.4 1.4 0 1 U 0.6 J ND/NA 2200 2300 4.44 0.1 U 0.093 J ND/NA 1400 1400 0 0.2 U 0.2 U ND/NA 45.9 46.1 0.43 2.2 3.1 33.96 0.5 U 0.5 U ND/NA 2600 2500 -3.92 0.091 J 0.14 42.42 ND/NA 1.6 2 22.22 12 10 U ND/NA Sample Location OW-310D Ta b l e 2 - 3 A s h P o r e w a t e r A n a l y t i c a l R e s u l t s - R o u n d 1 a n d R o u n d 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin A B- 1 0 S A B- 1 0 S A B- 1 0 S L AB-10SL A B-15S Ro u n d 1 ( C S A S a m p l i n g ) R o u n d 2 ( 3 Q - 2 0 1 5 ) R o u n d 1 ( C S A S a m p l i n g ) R o u n d 2 ( 3 Q - 2 0 1 5 ) R o u n d 1 ( C S A S a m p l i n g ) 6/ 2 6 / 2 0 1 5 9 / 1 1 / 2 0 1 5 6 / 2 6 / 2 0 1 5 9 / 1 1 / 2 0 1 5 6 / 2 2 / 2 0 1 5 NN N N N A B- 1 0 S DR - A B - 1 0 S - N S - 3 Q 1 5 A B- 1 0 S L DR-AB-10SL-NS-3Q15 A B-15S Co n s t i t u e n t F r a c t i o n C A S R N Cr i t e r i a M i n (r a n g e Gr o u n d w a t e r Cr i t e r i a Cr i t e r i a So u r c e U n i t Al u m i n u m D 7 4 2 9 - 9 0 - 5 - - N S µ g / L 1 4 0 1 0 0 U 1 2 0 0 1 0 0 U 1 4 0 Al u m i n u m T 7 4 2 9 - 9 0 - 5 - - N S µ g / L 5 3 0 6 0 0 3 0 0 0 3 5 0 0 1 3 2 0 0 An t i m o n y D 7 4 4 0 - 3 6 - 0 - - N S µ g / L 1 . 6 0 . 2 4 J 1 1 . 6 1 . 6 2 . 7 An t i m o n y T 7 4 4 0 - 3 6 - 0 - - 1 IM A C µ g / L 1. 3 0. 3 5 J 9. 8 2 . 4 6 . 7 Ar s e n i c D 7 4 4 0 - 3 8 - 2 - - N S µ g / L 2 2 9 3 7 1 8 . 7 8 . 2 2 9 6 Ar s e n i c T 7 4 4 0 - 3 8 - 2 - - 10 02 L µ g / L 23 3 3 3 4 J + 9. 6 16.2 J+ 4 4 2 Ba r i u m D 7 4 4 0 - 3 9 - 3 - - N S µ g / L 2 5 0 2 7 0 1 7 0 8 3 1 6 0 Ba r i u m T 7 4 4 0 - 3 9 - 3 - - 70 0 02 L µ g / L 2 6 0 2 7 0 1 3 0 1 7 0 810 Be r y l l i u m D 7 4 4 0 - 4 1 - 7 - - N S µ g / L 0 . 1 7 J 0 . 2 U 0 . 1 4 J 0 . 2 U 0 . 2 3 J + Be r y l l i u m T 7 4 4 0 - 4 1 - 7 - - 4 IM A C µ g / L 0 . 1 5 J 0 . 2 J 0 . 1 7 J 0 . 6 4 12.1 Bo r o n D 7 4 4 0 - 4 2 - 8 - - N S µ g / L 3 5 0 3 5 0 4 4 0 4 5 0 3 9 0 Bo r o n T 7 4 4 0 - 4 2 - 8 - - 7 0 0 0 2 L µ g / L 3 3 0 3 3 0 4 4 0 4 4 0 4 2 0 Ca d m i u m D 7 4 4 0 - 4 3 - 9 - - N S µ g / L 0 . 0 7 2 J 0 . 0 8 U 0 . 0 8 U 0 . 0 8 U 0 . 0 8 U Ca d m i u m T 7 4 4 0 - 4 3 - 9 - - 2 0 2 L µ g / L 0 . 0 5 8 J 0 . 0 8 U 0 . 0 3 3 J 0 . 0 7 3 J 1 . 3 Ca l c i u m T 7 4 4 0 - 7 0 - 2 - - N S µ g / L 3 6 9 0 0 3 8 1 0 0 2 4 5 0 0 2 1 8 0 0 4 7 8 0 0 Ch r o m i u m D 7 4 4 0 - 4 7 - 3 - - N S µ g / L 1 . 7 0 . 1 9 J 4 . 2 1 . 1 0 . 5 U Ch r o m i u m T 7 4 4 0 - 4 7 - 3 - - 10 02 L µ g / L 1 . 3 1 . 1 J + 5 . 1 12.9 50 Co b a l t D 7 4 4 0 - 4 8 - 4 - - N S µ g / L 9 . 4 5 . 1 1 . 3 0 . 3 9 J 0 . 5 U Co b a l t T 7 4 4 0 - 4 8 - 4 - - 1 IM A C µ g / L 8. 5 6 . 2 1 . 8 5 . 2 3 4 . 1 Co p p e r D 7 4 4 0 - 5 0 - 8 - - N S µ g / L 4 . 3 3 . 1 4 . 3 2 . 3 0 . 2 5 J + Co p p e r T 7 4 4 0 - 5 0 - 8 - - 1 0 0 0 0 2 L µ g / L 2 . 5 2 . 7 5 1 7 . 5 1 9 7 Ir o n D 7 4 3 9 - 8 9 - 6 - - N S µ g / L 7 5 0 0 7 7 0 0 J + 7 6 0 5 0 U J 5 0 U Ir o n T 7 4 3 9 - 8 9 - 6 - - 30 0 02 L µ g / L 76 0 0 9 7 0 0 2 9 0 0 3 8 0 0 5 8 0 0 Le a d D 7 4 3 9 - 9 2 - 1 - - N S µ g / L 0 . 8 6 0 . 3 1 . 1 0 . 1 5 0 . 1 U Le a d T 7 4 3 9 - 9 2 - 1 - - 15 02 L µ g / L 0 . 8 5 1 . 2 1 . 5 5 . 2 77.4 Ma g n e s i u m T 7 4 3 9 - 9 5 - 4 - - N S µ g / L 7 0 7 0 7 2 7 0 7 0 5 0 7 9 9 0 9 4 8 0 Ma n g a n e s e D 7 4 3 9 - 9 6 - 5 - - N S µ g / L 9 1 0 8 3 0 3 5 0 3 9 2 8 Ma n g a n e s e T 7 4 3 9 - 9 6 - 5 - - 50 02 L µ g / L 86 0 8 4 0 2 5 0 1 5 0 1 7 0 Me r c u r y D 7 4 3 9 - 9 7 - 6 - - N S µ g / L 0 . 2 U 0 . 2 U 0 . 2 U 0 . 2 U 0 . 2 U Me r c u r y T 7 4 3 9 - 9 7 - 6 - - 1 0 2 L µ g / L 0 . 2 U 0 . 2 U J 0 . 2 U 0 . 2 U J 0 . 0 8 J Me t h a n e N 7 4 - 8 2 - 8 - - N S µ g / L 4 3 . 4 1 . 8 J + 3 0 . 3 2 1 . 8 4 0 . 1 J + Mo l y b d e n u m D 7 4 3 9 - 9 8 - 7 - - N S µ g / L 1 4 . 5 1 6 . 6 1 7 . 3 1 9 . 1 2 1 . 5 Mo l y b d e n u m T 7 4 3 9 - 9 8 - 7 - - N S µ g / L 1 4 . 3 1 4 . 9 2 8 . 5 1 9 . 1 2 8 . 6 Ni c k e l D 7 4 4 0 - 0 2 - 0 - - N S µ g / L 5 . 8 3 . 3 5 . 2 4 0 . 9 6 J + Ni c k e l T 7 4 4 0 - 0 2 - 0 - - 10 0 02 L µ g / L 5 . 4 4 . 6 5 . 9 1 1 . 2 7 0 . 1 Po t a s s i u m T 7 4 4 0 - 0 9 - 7 - - N S µ g / L 6 7 9 0 6 6 5 0 1 8 0 0 0 3 1 9 0 0 9 3 4 0 Se l e n i u m D 7 7 8 2 - 4 9 - 2 - - N S µ g / L 0 . 3 8 J 0 . 5 U 0 . 8 7 2 . 4 0 . 6 5 Se l e n i u m T 7 7 8 2 - 4 9 - 2 - - 20 02 L µ g / L 0 . 2 4 J 0 . 5 U 1 . 1 3 . 3 1 2 . 2 So d i u m T 7 4 4 0 - 2 3 - 5 - - N S µ g / L 1 9 5 0 0 1 7 6 0 0 4 0 8 0 0 5 1 4 0 0 1 9 2 0 0 St r o n t i u m D 7 4 4 0 - 2 4 - 6 - - N S µ g / L 9 3 0 1 1 0 0 3 7 0 2 7 0 7 7 0 St r o n t i u m T 7 4 4 0 - 2 4 - 6 - - N S µ g / L 9 5 0 1 0 0 0 3 4 0 3 7 0 1 1 0 0 Th a l l i u m D 7 4 4 0 - 2 8 - 0 - - N S µ g / L 0 . 5 9 0 . 2 4 0 . 0 8 4 J 0 . 0 9 1 J 0 . 2 Th a l l i u m T 7 4 4 0 - 2 8 - 0 - - 0. 2 IM A C µ g / L 0. 5 4 0 . 3 1 0. 1 U 0.44 3.4 Va n a d i u m D 7 4 4 0 - 6 2 - 2 - - N S µ g / L 4 . 1 0 . 6 7 J 1 1 . 8 8 . 2 4 5 . 4 Va n a d i u m T 7 4 4 0 - 6 2 - 2 - - 0. 3 IM A C µ g / L 3 3 . 3 1 4 . 6 3 0 . 7 2 5 4 Zi n c D 7 4 4 0 - 6 6 - 6 - - N S µ g / L 7 . 3 J 4 . 1 J 1 4 1 2 1 0 U Zi n c T 7 4 4 0 - 6 6 - 6 - - 1 0 0 0 0 2 L µ g / L 7 . 6 J 8 . 8 J 1 2 7 1 5 1 To t a l D i s s o l v e d S o l i d s N T D S - - 5 0 0 0 0 0 0 2 L µ g / L 2 2 6 0 0 0 2 0 5 0 0 0 2 3 9 0 0 0 3 1 0 0 0 0 2 2 6 0 0 0 To t a l O r g a n i c C a r b o n N T O C - - N S µ g / L 1 0 0 0 U 1 0 0 0 U 1 8 0 0 2 1 3 0 0 5 1 0 J To t a l S u s p e n d e d S o l i d s N T S S - - N S µ g / L 2 9 1 0 0 7 1 7 0 0 3 6 6 0 0 1 3 4 0 0 0 4 8 0 0 0 0 Al k a l i n i t y , C O 3 N A L K - C O 3 - - N S µ g / L 5 0 0 0 U 5 0 0 0 U 5 0 0 0 U 1 6 0 0 J 5 0 0 0 U Al k a l i n i t y , H C O 3 N A L K - H C O 3 - - N S µ g / L 1 3 8 0 0 0 1 2 1 0 0 0 1 4 7 0 0 0 1 3 5 0 0 0 1 2 8 0 0 0 Al k a l i n i t y , l a b N A L K - L A B - - N S µ g / L 1 3 8 0 0 0 1 2 1 0 0 0 1 4 7 0 0 0 1 3 6 0 0 0 1 2 8 0 0 0 Ch l o r i d e N 1 6 8 8 7 - 0 0 - 6 - - 2 5 0 0 0 0 0 2 L µ g / L 1 2 5 0 0 1 1 3 0 0 1 5 9 0 0 1 8 5 0 0 1 5 9 0 0 Ni t r o g e n , N O 2 p l u s N O 3 N N O 2 - N O 3 - - N S µ g / L 3 0 2 0 U 3 0 2 0 0 2 0 U Lo c a t i o n : Ev e n t : Sa m p l e D a t e : Sa m p l e T y p e C o d e : Sa m p l e N a m e / I D : Page 1 of 4 Ta b l e 2 - 3 A s h P o r e w a t e r A n a l y t i c a l R e s u l t s - R o u n d 1 a n d R o u n d 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin A B- 1 0 S A B- 1 0 S A B- 1 0 S L AB-10SL A B-15S Ro u n d 1 ( C S A S a m p l i n g ) R o u n d 2 ( 3 Q - 2 0 1 5 ) R o u n d 1 ( C S A S a m p l i n g ) R o u n d 2 ( 3 Q - 2 0 1 5 ) R o u n d 1 ( C S A S a m p l i n g ) 6/ 2 6 / 2 0 1 5 9 / 1 1 / 2 0 1 5 6 / 2 6 / 2 0 1 5 9 / 1 1 / 2 0 1 5 6 / 2 2 / 2 0 1 5 NN N N N A B- 1 0 S DR - A B - 1 0 S - N S - 3 Q 1 5 A B- 1 0 S L DR-AB-10SL-NS-3Q15 A B-15S Co n s t i t u e n t F r a c t i o n C A S R N Cr i t e r i a M i n (r a n g e Gr o u n d w a t e r Cr i t e r i a Cr i t e r i a So u r c e U n i t Lo c a t i o n : Ev e n t : Sa m p l e D a t e : Sa m p l e T y p e C o d e : Sa m p l e N a m e / I D : Su l f a t e N 1 4 8 0 8 - 7 9 - 8 - - 2 5 0 0 0 0 0 2 L µ g / L 24 5 0 0 2 2 3 0 0 2 9 8 0 0 4 5 2 0 0 3 9 3 0 0 Su l f i d e N 1 8 4 9 6 - 2 5 - 8 - - NS µg / L 10 0 U 10 0 U 10 0 U 100 U 100 U As ( I I I ) T 7 7 8 4 - 4 6 - 5 - - NS µg / L 18 3 0 . 6 5 4 As ( V ) T 1 0 1 0 3 - 6 0 - 3 - - NS µg / L 28 . 5 7 . 5 4 Ch r o m i u m ( V I ) T 1 8 5 4 0 - 2 9 - 9 - - 0. 0 7 DH H S µ g / L 0. 0 0 6 J + 0. 6 7 8 Fe ( I I ) T 1 3 4 5 - 2 5 - 1 - - NS µg / L 71 4 0 1 4 3 Fe ( I I I ) T 1 3 0 9 - 3 7 - 1 - - NS µg / L 68 8 7 1 . 3 Mn ( I I ) T 1 3 4 4 - 4 3 - 0 - - NS µg / L 10 5 0 1 9 4 Mn ( I V ) T 1 3 1 3 - 1 3 - 9 - - NS µg / L 1 U J 20 2 Se ( I V ) T 1 0 1 0 2 - 1 8 - 8 - - NS µg / L 0. 5 U 0. 8 0 2 Se ( V I ) T 1 3 4 1 0 - 0 1 - 0 - - NS µg / L 0. 5 U 0. 3 8 8 Ur a n i u m , N a t u r a l T 7 4 4 0 - 6 1 - 1 - - NS µg / L 1. 6 6 1. 9 1 Ra d i u m - 2 2 6 T 1 3 9 8 2 - 6 3 - 3 - - NS pC i / L 1. 0 7 1 . 4 7 Ra d i u m - 2 2 8 T 1 5 2 6 2 - 2 0 - 1 - - NS pC i / L 3 U 3 U Ur a n i u m - 2 3 3 T 1 3 9 6 8 - 5 5 - 3 - - NS µg / L 0. 0 5 U 0. 0 5 U Ur a n i u m - 2 3 4 T 1 3 9 6 6 - 2 9 - 5 - - NS µg / L 0. 0 5 U 0. 0 5 U Ur a n i u m - 2 3 6 T 1 3 9 8 2 - 7 0 - 2 - - NS µg / L 0. 0 5 U 0. 0 5 U Di s s o l v e d O x y g e n N DO -- NS mg / L 6. 3 0. 1 2. 1 3 1.2 0.15 Te m p ( C e l c i u s ) N TE M P -- NS De g C 25 22 . 3 31 . 7 29.5 20.3 pH ( f i e l d ) N PH 6. 5 8. 5 02 L S U 6. 4 6 6. 7 8. 6 1 8 . 9 8 . 5 1 Tu r b i d i t y , f i e l d N TU R B -- NS NT U 82 . 6 3 10 12 5 . 9 154.2 1000 Sp e c . C o n d . ( f i e l d ) N SC -- NS µS / c m 36 9 . 2 36 9 . 7 39 3 . 2 466 263.3 Ox i d a t i o n R e d u c t i o n P o t e n t i a l N OR P -- NS mV -3 . 9 -9 7 . 5 44 . 7 56 125.5 GW D e p t h ( T O C ) N G W _ D E P T H - T O C - - NS ft 20 No t e s : µg / L = m i c r o g r a m s p e r l i t e r µS / c m = m i c r o s i e m e n s p e r c e n t i m e t e r ft = f e e t mV = m i l l i v o l t s NT U - n e p h e l o m e t r i c t u r b i d i t y u n i t s pC i / L = p i c o c u r i e s p e r l i t e r SU = s t a n d a r d u n i t J = l a b o r a t o r y e s t i m a t e d c o n c e n t r a t i o n J- = e s t i m a t e d c o n c e n t r a t i o n , b i a s e d l o w J+ = e s t i m a t e d c o n c e n t r a t i o n , b i a s e d h i g h U = r e s u l t s n o t d e t e c t e d a t c o n c e n t r a t i o n s w h i c h e q u a l t h e l a b o r a t o r y ' s m e t h o d r e p o r t i n g l i m i t 02 L = N o r t h C a r o l i n a g r o u n d w a t e r s t a n d a r d s a s s p e c i f i e d i n T 1 5 A N C A C 0 2 L D = d i s s o l v e d De g C = d e g r e e C e l s i u s DH H S = N o r t h C a r o l i n a D e p a r t m e n t o f H e a l t h a n d H u m a n S e r v i c e s DO = d i s s o l v e d o x y g e n GW = g r o u n d w a t e r GW Q S = g r o u n d w a t e r q u a l i t y s t a n d a r d IM A C = I n t e r i m M a x i m u m A l l o w C o n c e n t r a t i o n N = n o r m a l NS = n o s t a n d a r d T = t o t a l TD S = t o t a l d i s s o l v e d s o l i d s TO C = t o t a l o r g a n i c c a r b o n 02 B = N o r t h C a r o l i n a s u r f a c e w a t e r s t a n d a r d s a s s p e c i f i e d i n T 1 5 N C A C 0 2 B . 0 2 1 1 a n d . 0 2 1 6 (a m e n d e d e f f e c t i v e J a n u a r y 2 0 1 5 ) Page 2 of 4 Ta b l e 2 - 3 A s h P o r e w a t e r A n a l y t i c a l R e s u l t s - R o u n d 1 a n d R o u n d 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Co n s t i t u e n t Fr a c t i o n C A S R N Cr i t e r i a M i n (r a n g e Gr o u n d w a t e r Cr i t e r i a Cr i t e r i a So u r c e U n i t Al u m i n u m D 7 4 2 9 - 9 0 - 5 - - N S µ g / L Al u m i n u m T 7 4 2 9 - 9 0 - 5 - - N S µ g / L An t i m o n y D 7 4 4 0 - 3 6 - 0 - - N S µ g / L An t i m o n y T 7 4 4 0 - 3 6 - 0 - - 1 IM A C µ g / L Ar s e n i c D 7 4 4 0 - 3 8 - 2 - - N S µ g / L Ar s e n i c T 7 4 4 0 - 3 8 - 2 - - 10 02 L µ g / L Ba r i u m D 7 4 4 0 - 3 9 - 3 - - N S µ g / L Ba r i u m T 7 4 4 0 - 3 9 - 3 - - 70 0 02 L µ g / L Be r y l l i u m D 7 4 4 0 - 4 1 - 7 - - N S µ g / L Be r y l l i u m T 7 4 4 0 - 4 1 - 7 - - 4 IM A C µ g / L Bo r o n D 7 4 4 0 - 4 2 - 8 - - N S µ g / L Bo r o n T 7 4 4 0 - 4 2 - 8 - - 7 0 0 0 2 L µ g / L Ca d m i u m D 7 4 4 0 - 4 3 - 9 - - N S µ g / L Ca d m i u m T 7 4 4 0 - 4 3 - 9 - - 2 0 2 L µ g / L Ca l c i u m T 7 4 4 0 - 7 0 - 2 - - N S µ g / L Ch r o m i u m D 7 4 4 0 - 4 7 - 3 - - N S µ g / L Ch r o m i u m T 7 4 4 0 - 4 7 - 3 - - 10 02 L µ g / L Co b a l t D 7 4 4 0 - 4 8 - 4 - - N S µ g / L Co b a l t T 7 4 4 0 - 4 8 - 4 - - 1 IM A C µ g / L Co p p e r D 7 4 4 0 - 5 0 - 8 - - N S µ g / L Co p p e r T 7 4 4 0 - 5 0 - 8 - - 1 0 0 0 0 2 L µ g / L Ir o n D 7 4 3 9 - 8 9 - 6 - - N S µ g / L Ir o n T 7 4 3 9 - 8 9 - 6 - - 30 0 02 L µ g / L Le a d D 7 4 3 9 - 9 2 - 1 - - N S µ g / L Le a d T 7 4 3 9 - 9 2 - 1 - - 15 02 L µ g / L Ma g n e s i u m T 7 4 3 9 - 9 5 - 4 - - N S µ g / L Ma n g a n e s e D 7 4 3 9 - 9 6 - 5 - - N S µ g / L Ma n g a n e s e T 7 4 3 9 - 9 6 - 5 - - 50 02 L µ g / L Me r c u r y D 7 4 3 9 - 9 7 - 6 - - N S µ g / L Me r c u r y T 7 4 3 9 - 9 7 - 6 - - 1 0 2 L µ g / L Me t h a n e N 7 4 - 8 2 - 8 - - N S µ g / L Mo l y b d e n u m D 7 4 3 9 - 9 8 - 7 - - N S µ g / L Mo l y b d e n u m T 7 4 3 9 - 9 8 - 7 - - N S µ g / L Ni c k e l D 7 4 4 0 - 0 2 - 0 - - N S µ g / L Ni c k e l T 7 4 4 0 - 0 2 - 0 - - 10 0 02 L µ g / L Po t a s s i u m T 7 4 4 0 - 0 9 - 7 - - N S µ g / L Se l e n i u m D 7 7 8 2 - 4 9 - 2 - - N S µ g / L Se l e n i u m T 7 7 8 2 - 4 9 - 2 - - 20 02 L µ g / L So d i u m T 7 4 4 0 - 2 3 - 5 - - N S µ g / L St r o n t i u m D 7 4 4 0 - 2 4 - 6 - - N S µ g / L St r o n t i u m T 7 4 4 0 - 2 4 - 6 - - N S µ g / L Th a l l i u m D 7 4 4 0 - 2 8 - 0 - - N S µ g / L Th a l l i u m T 7 4 4 0 - 2 8 - 0 - - 0. 2 IM A C µ g / L Va n a d i u m D 7 4 4 0 - 6 2 - 2 - - N S µ g / L Va n a d i u m T 7 4 4 0 - 6 2 - 2 - - 0. 3 IM A C µ g / L Zi n c D 7 4 4 0 - 6 6 - 6 - - N S µ g / L Zi n c T 7 4 4 0 - 6 6 - 6 - - 1 0 0 0 0 2 L µ g / L To t a l D i s s o l v e d S o l i d s N T D S - - 5 0 0 0 0 0 0 2 L µ g / L To t a l O r g a n i c C a r b o n N T O C - - N S µ g / L To t a l S u s p e n d e d S o l i d s N T S S - - N S µ g / L Al k a l i n i t y , C O 3 N A L K - C O 3 - - N S µ g / L Al k a l i n i t y , H C O 3 N A L K - H C O 3 - - N S µ g / L Al k a l i n i t y , l a b N A L K - L A B - - N S µ g / L Ch l o r i d e N 1 6 8 8 7 - 0 0 - 6 - - 2 5 0 0 0 0 0 2 L µ g / L Ni t r o g e n , N O 2 p l u s N O 3 N N O 2 - N O 3 - - N S µ g / L Lo c a t i o n : Ev e n t : Sa m p l e D a t e : Sa m p l e T y p e C o d e : Sa m p l e N a m e / I D : A B- 2 5 S A B- 2 5 S A B-5S AB-5S Ro u n d 1 ( C S A S a m p l i n g ) R o u n d 2 ( 3 Q - 2 0 1 5 ) R o u n d 1 ( C S A S a m p l i n g ) R o u n d 2 ( 3 Q - 2 0 1 5 ) 6/ 2 6 / 2 0 1 5 9/ 1 1 / 2 0 1 5 6/ 1 9 / 2 0 1 5 9/9/2015 NN N N A B- 2 5 S DR - A B - 2 5 S - N S - 3 Q 1 5 A B-5S DR-AB-5S-NS-3Q15 64 J 10 0 U 10 0 U 100 U 79 J 71 8 0 0 84 J 100 U 1. 6 1 . 4 0 . 9 4 J+1.6 1. 6 3 . 6 0. 9 1 1.7 94 . 7 4 3 . 5 1 3 9 2 3 5 96 . 4 4 1 7 1 4 5 2 2 5 46 5 0 8 6 9 2 56 11 0 0 91 92 0. 2 U 0. 2 U 0. 2 U 1.5 0. 2 U 7. 2 0. 2 U 1.6 58 0 6 2 0 3 2 0 J+300 63 0 4 5 0 3 1 0 3 2 0 0. 0 8 U 0. 0 8 U 0. 0 3 6 J 0.21 0. 0 8 U 0. 5 7 0. 0 3 6 J 0.2 37 4 0 0 5 6 1 0 0 5 9 1 0 0 5 4 7 0 0 0. 5 6 J + 0. 4 8 J 1. 7 J + 9.6 0. 4 7 J 36 3 4 11.3 0. 1 5 J 0. 2 2 J 27 . 1 25.8 0. 1 6 J 10 9 2 8 . 2 2 5 . 3 0. 7 2 J + 1. 8 0. 3 7 J + 30.4 1 U 15 1 0. 4 9 J 33.8 29 J 50 U 22 8 0 0 30300 74 98 9 0 0 2 5 1 0 0 2 9 7 0 0 0. 0 5 8 J + 0. 1 7 0. 1 U 8.6 0. 0 4 9 J 62 . 2 0. 1 5 1 1 . 1 60 2 0 1 3 2 0 0 1 1 1 0 0 1 0 7 0 0 70 8 5 1 5 0 0 1 5 0 0 72 3 4 0 0 1 5 0 0 1 4 0 0 0. 2 U 0. 2 U 0. 2 U 0.2 U 0. 2 U 0. 2 8 0. 2 U 0.2 U 44 4 9 . 3 2 9 . 4 J+29.8 68 . 3 6 5 . 2 2 0 . 1 1 9 . 5 71 . 3 1 5 . 7 2 0 . 9 1 9 . 5 2 6 . 9 2 1 . 4 2 5 . 6 2 23 8 24 . 9 2 6 . 4 61 2 0 6 7 5 0 1 3 0 0 0 1 3 1 0 0 0. 6 6 0. 3 J 0. 5 U 1.8 0. 7 4 30 . 4 0. 5 U 2.5 28 8 0 0 2 3 2 0 0 1 4 9 0 0 1 4 6 0 0 65 0 7 5 0 1 3 0 0 1 2 0 0 79 0 1 2 0 0 1 3 0 0 1 2 0 0 0. 0 4 3 J 0. 0 1 8 J 0. 6 5 1.6 0. 0 4 3 J 1. 5 0 . 6 9 1 . 6 13 . 2 1 2 . 6 1 U 31.7 13 . 3 6 8 9 0 . 6 2 J 33.7 6. 1 J 10 U 8. 5 J 21 10 U 22 0 17 10 24 3 0 0 0 2 4 5 0 0 0 3 5 8 0 0 0 3 3 5 0 0 0 93 0 J 10 0 0 57 0 J 1000 U 50 0 0 3 7 6 0 0 0 2 5 8 0 0 4 3 2 0 0 50 0 0 U 50 0 0 U 50 0 0 U 5000 U 85 6 0 0 9 4 0 0 0 8 9 2 0 0 7 0 6 0 0 85 6 0 0 9 4 0 0 0 8 9 2 0 0 7 0 6 0 0 14 8 0 0 1 7 4 0 0 1 1 1 0 0 1 0 9 0 0 20 U 14 0 20 U 33 Page 3 of 4 Ta b l e 2 - 3 A s h P o r e w a t e r A n a l y t i c a l R e s u l t s - R o u n d 1 a n d R o u n d 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Co n s t i t u e n t Fr a c t i o n C A S R N Cr i t e r i a M i n (r a n g e Gr o u n d w a t e r Cr i t e r i a Cr i t e r i a So u r c e U n i t Lo c a t i o n : Ev e n t : Sa m p l e D a t e : Sa m p l e T y p e C o d e : Sa m p l e N a m e / I D : Su l f a t e N 1 4 8 0 8 - 7 9 - 8 - - 2 5 0 0 0 0 0 2 L µ g / L Su l f i d e N 1 8 4 9 6 - 2 5 - 8 - - NS µg / L As ( I I I ) T 7 7 8 4 - 4 6 - 5 - - NS µg / L As ( V ) T 1 0 1 0 3 - 6 0 - 3 - - NS µg / L Ch r o m i u m ( V I ) T 1 8 5 4 0 - 2 9 - 9 - - 0. 0 7 DH H S µ g / L Fe ( I I ) T 1 3 4 5 - 2 5 - 1 - - NS µg / L Fe ( I I I ) T 1 3 0 9 - 3 7 - 1 - - NS µg / L Mn ( I I ) T 1 3 4 4 - 4 3 - 0 - - NS µg / L Mn ( I V ) T 1 3 1 3 - 1 3 - 9 - - NS µg / L Se ( I V ) T 1 0 1 0 2 - 1 8 - 8 - - NS µg / L Se ( V I ) T 1 3 4 1 0 - 0 1 - 0 - - NS µg / L Ur a n i u m , N a t u r a l T 7 4 4 0 - 6 1 - 1 - - NS µg / L Ra d i u m - 2 2 6 T 1 3 9 8 2 - 6 3 - 3 - - NS pC i / L Ra d i u m - 2 2 8 T 1 5 2 6 2 - 2 0 - 1 - - NS pC i / L Ur a n i u m - 2 3 3 T 1 3 9 6 8 - 5 5 - 3 - - NS µg / L Ur a n i u m - 2 3 4 T 1 3 9 6 6 - 2 9 - 5 - - NS µg / L Ur a n i u m - 2 3 6 T 1 3 9 8 2 - 7 0 - 2 - - NS µg / L Di s s o l v e d O x y g e n N DO -- NS mg / L Te m p ( C e l c i u s ) N TE M P -- NS De g C pH ( f i e l d ) N PH 6. 5 8. 5 02 L S U Tu r b i d i t y , f i e l d N TU R B -- NS NT U Sp e c . C o n d . ( f i e l d ) N SC -- NS µS / c m Ox i d a t i o n R e d u c t i o n P o t e n t i a l N OR P -- NS mV GW D e p t h ( T O C ) N G W _ D E P T H - T O C - - NS ft No t e s : µg / L = m i c r o g r a m s p e r l i t e r µS / c m = m i c r o s i e m e n s p e r c e n t i m e t e r ft = f e e t mV = m i l l i v o l t s NT U - n e p h e l o m e t r i c t u r b i d i t y u n i t s pC i / L = p i c o c u r i e s p e r l i t e r SU = s t a n d a r d u n i t J = l a b o r a t o r y e s t i m a t e d c o n c e n t r a t i o n J- = e s t i m a t e d c o n c e n t r a t i o n , b i a s e d l o w J+ = e s t i m a t e d c o n c e n t r a t i o n , b i a s e d h i g h U = r e s u l t s n o t d e t e c t e d a t c o n c e n t r a t i o n s w h i c h e q u a l t h e l a b o r a t o r y ' s m e t h o d r e p o r t i n g l i m i t 02 L = N o r t h C a r o l i n a g r o u n d w a t e r s t a n d a r d s a s s p e c i f i e d i n T 1 5 A N C A C 0 2 L D = d i s s o l v e d De g C = d e g r e e C e l s i u s DH H S = N o r t h C a r o l i n a D e p a r t m e n t o f H e a l t h a n d H u m a n S e r v i c e s DO = d i s s o l v e d o x y g e n GW = g r o u n d w a t e r GW Q S = g r o u n d w a t e r q u a l i t y s t a n d a r d IM A C = I n t e r i m M a x i m u m A l l o w C o n c e n t r a t i o n N = n o r m a l NS = n o s t a n d a r d T = t o t a l TD S = t o t a l d i s s o l v e d s o l i d s TO C = t o t a l o r g a n i c c a r b o n 02 B = N o r t h C a r o l i n a s u r f a c e w a t e r s t a n d a r d s a s s p e c i f i e d i n T 1 5 N C A C 0 2 B . 0 2 1 1 a n d . 0 2 1 6 (a m e n d e d e f f e c t i v e J a n u a r y 2 0 1 5 ) A B- 2 5 S A B- 2 5 S A B-5S AB-5S Ro u n d 1 ( C S A S a m p l i n g ) R o u n d 2 ( 3 Q - 2 0 1 5 ) R o u n d 1 ( C S A S a m p l i n g ) R o u n d 2 ( 3 Q - 2 0 1 5 ) 6/ 2 6 / 2 0 1 5 9/ 1 1 / 2 0 1 5 6/ 1 9 / 2 0 1 5 9/9/2015 NN N N A B- 2 5 S DR - A B - 2 5 S - N S - 3 Q 1 5 A B-5S DR-AB-5S-NS-3Q15 74 7 0 0 8 1 1 0 0 1 2 5 0 0 0 1 2 6 0 0 0 10 0 U 1 0 0 U 1 0 0 U 1 0 0 U 54 . 2 43 . 2 0. 0 2 3 J + 17 20 U 79 . 2 1 U J 0. 4 8 5 0. 5 U 3. 4 3 1. 5 8 3 U 0. 0 5 U 0. 0 5 U 0. 0 5 U 0. 4 7 0 . 5 4 0 . 1 6 0 . 1 24 . 3 2 5 . 7 1 7 . 3 2 2 . 5 8. 2 1 8 . 3 3 6 . 6 6.4 4. 4 3 4 . 3 6 7 . 1 7 . 5 38 7 4 1 1 . 3 4 7 8 5 5 2 19 0 1 0 . 3 - 7 2 - 7 3 47 . 6 5 1 3 . 1 5 Page 4 of 4 Table 2-4 Ash Basin Water Analytical Results - Round 1 and Round 2 Page 1 of 2 SW-1 SW-1 SW-9 SW-9 Round 1 Round 2 Round 1 Round 2 5/27/2015 9/11/2015 5/27/2015 9/11/2015 N N N N SW-1 DR-SW-1-NS-3Q15 SW-9 DR-SW-9-NS-3Q15 Constituent CAS RN Fractio SWQS Criteria NCDEQ 02B GWQS Criteria NCDEQ 02L Unit Aluminum 7429-90-5 D ----ug/l 43 100 U 5 U 100 U Aluminum 7429-90-5 T -87 --ug/l 613 100 U 129 360 Antimony 7440-36-0 D ----ug/l 1.02 1.1 1 U 0.58 Antimony 7440-36-0 T -640 -1 ug/l 1.21 0.97 1 U 0.72 Arsenic 7440-38-2 D -150 --ug/l 13.8 31.8 46.3 59 Arsenic 7440-38-2 T -10 -10 ug/l 15.5 37.9 51.1 75.9 Barium 7440-39-3 D ----ug/l 20 110 88 92 Barium 7440-39-3 T -200000 -700 ug/l 18 120 99 120 Beryllium 7440-41-7 D -6.5 --ug/l 1 U 0.2 U 1 U 0.2 U Beryllium 7440-41-7 T ---4 ug/l 1 U 0.2 U 1 U 0.11 J Boron 7440-42-8 D ----ug/l 180 180 360 380 Boron 7440-42-8 T ---700 ug/l 157 190 364 400 Cadmium 7440-43-9 D -0.15 --ug/l 1 U 0.08 U 1 U 0.08 U Cadmium 7440-43-9 T ---2 ug/l 1 U 0.08 U 1 U 0.08 U Calcium 7440-70-2 T ----ug/l 19700 20800 45400 51600 Chromium 7440-47-3 D -11 --ug/l 1 U 0.25 J 1 U 0.45 J Chromium 7440-47-3 T ---10 ug/l 1 U 0.26 J 1 U 1 Cobalt 7440-48-4 D ----ug/l 1 U 0.5 U 1 U 0.5 U Cobalt 7440-48-4 T -4 -1 ug/l 1 U 0.22 J 1 U 0.74 Copper 7440-50-8 D -2.7 --ug/l 3.39 J+0.52 J 1 U 0.23 J Copper 7440-50-8 T ---1000 ug/l 4.75 0.3 J 5.11 J+1.7 Iron 7439-89-6 D ----ug/l 21 50 U 10 U 50 U Iron 7439-89-6 T ---300 ug/l 323 220 140 550 Lead 7439-92-1 D -0.54 --ug/l 1 U 0.22 1 U 0.1 U Lead 7439-92-1 T ---15 ug/l 1 U 0.06 J 1 U 0.83 Magnesium 7439-95-4 T ----ug/l 7240 6680 13500 14300 Manganese 7439-96-5 D ----ug/l 16 59 35 5 U Manganese 7439-96-5 T ---50 ug/l 9 140 154 230 Mercury 7439-97-6 T -0.012 -1 ug/l 0.0011 J+0.00778 0.000949 J+0.0011 J+ Methane 74-82-8 N ----ug/l 10 UJ 15 10 UJ 16.4 Molybdenum 7439-98-7 D ----ug/l 9.11 10.8 7.62 9.4 Molybdenum 7439-98-7 T -2000 --ug/l 9.36 9.7 7.65 9.8 Nickel 7440-02-0 D -16 --ug/l 1.2 1.6 1 U 0.7 Nickel 7440-02-0 T ---100 ug/l 2.5 1.6 1.16 1.6 Potassium 7440-09-7 T ----ug/l 3090 5540 4690 5840 Selenium 7782-49-2 D ----ug/l 2.32 1.9 1 U 0.36 J Selenium 7782-49-2 T -5 -20 ug/l 2.87 2 1 U 0.45 J Sodium 7440-23-5 T ----ug/l 11500 8890 17000 18700 Strontium 7440-24-6 D ----ug/l 322 290 883 1000 Strontium 7440-24-6 T -40000 --ug/l 320 300 895 1100 Thallium 7440-28-0 D ----ug/l 0.2 U 0.021 J 0.2 U 0.017 J Thallium 7440-28-0 T -0.47 -0.2 ug/l 0.2 U 0.019 J 0.2 U 0.035 J Vanadium 7440-62-2 D ----ug/l 4.94 2.4 0.701 1.1 Vanadium 7440-62-2 T ---0.3 ug/l 6.65 2.5 0.947 2.7 Zinc 7440-66-6 D -36 --ug/l 34 J+10 U 18 J+10 U Zinc 7440-66-6 T ---1000 ug/l 212 10 U 10 16 Total Dissolved Solids TDS N ---500000 ug/l 140000 136000 270000 290000 Total Organic Carbon TOC N ----ug/l 3800 4500 2100 1600 Total Suspended Solids TSS N ----ug/l 16000 3500 32000 35200 Alkalinity, CO3 ALK-CO3 N ----ug/l 11000 5000 U 10000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N ----ug/l 23000 45400 100000 114000 Alkalinity, lab ALK-LAB N ----ug/l 37000 45400 100000 114000 Chloride 16887-00-6 N -230000 -250000 ug/l 11000 8900 13000 14500 Nitrite as N 14797-65-0 N ---1000 ug/l 29 -132 - Nitrogen, NO2 plus NO3 NO2-NO3 N ----ug/l ---210 J- Sulfate 14808-79-8 N ---250000 ug/l 53000 40200 90000 90300 Sulfide 18496-25-8 N ----ug/l 100 U 100 U 100 U 100 U Dissolved Oxygen DO N ----mg/l -2.5 -7.8 Temperature TEMP N ----Deg C -27.4 -28.5 pH PH N 6 9 6.5 8.5 SU -7.3 -7.6 Turbidity, field TURB N ----NTU -5.61 -17.9 Specific Conductivity (field)SC N ----µS/cm -219.1 -453.9 Oxidation Reduction Potential ORP N ----mV -125.7 -90.3 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Table 2-4 Ash Basin Water Analytical Results - Round 1 and Round 2 Page 2 of 2 SW-1 SW-1 SW-9 SW-9 Round 1 Round 2 Round 1 Round 2 5/27/2015 9/11/2015 5/27/2015 9/11/2015 N N N N SW-1 DR-SW-1-NS-3Q15 SW-9 DR-SW-9-NS-3Q15 Constituent CAS RN Fractio SWQS Criteria NCDEQ 02B GWQS Criteria NCDEQ 02L Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Notes: µm = micron µg/L = micrograms per liter µS/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 Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 8 BG-1D BG-1D BG-5D BG-5D BG-5D BG-5D BG-5S BG-5S Round 3 Round 4 Round 1 Round 2 Round 3 Round 4 Round 1 Round 2 11/16/2015 12/15/2015 6/23/2015 9/9/2015 11/16/2015 12/15/2015 6/24/2015 9/9/2015 N N N N N N N N DR-BG-1D-NS-4Q15-1 DR-BG-1D-NS-4Q15-2 BG-5D DR-BG-5D-NS-3Q15 DR-BG-5D-NS-4Q15-1 DR-BG-5D-NS-4Q15-2 BG-5S DR-BG-5S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D --µg/L 1600 700 100 U 100 U 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T --µg/L 1000 760 60 J 220 100 U 100 U 590 720 Antimony 7440-36-0 D --µg/L 0.3 J 0.46 J 0.5 U 0.50 U 0.5 U 0.5 U 0.5 U 0.50 U Antimony 7440-36-0 T -1 IMAC µg/L 0.46 J 0.6 0.5 U 0.50 U 0.5 U 0.5 U 0.5 U 0.50 U Arsenic 7440-38-2 D --µg/L 2.1 2.2 0.17 J+0.50 U 0.5 U 0.5 U 0.5 U 0.50 U Arsenic 7440-38-2 T -10 02L µg/L 2.4 2.3 0.5 U 0.50 U 0.5 U 0.5 U 0.28 J 0.29 J Barium 7440-39-3 D --µg/L 3 J 5 U 24 19 17 15 10 12 Barium 7440-39-3 T -700 02L µg/L 5 U 5 U 29 22 16 16 21 22 Beryllium 7440-41-7 D --µg/L 0.2 U 0.2 U 0.15 J 0.20 U 0.2 U 0.2 U 0.2 U 0.20 U Beryllium 7440-41-7 T -4 IMAC µg/L 0.2 U 0.2 U 0.2 U 0.20 U 0.2 U 0.2 U 0.087 J 0.20 U Boron 7440-42-8 D --µg/L 58 65 50 U 50 U 50 U 50 U 50 U 50 U Boron 7440-42-8 T -700 02L µg/L 69 58 50 U 50 U 50 U 50 U 50 U 50 U Cadmium 7440-43-9 D --µg/L 0.08 U 0.08 U 0.032 J+0.080 U 0.08 U 0.08 U 0.08 U 0.080 U Cadmium 7440-43-9 T -2 02L µg/L 0.08 U 0.08 U 0.08 U 0.080 U 0.08 U 0.08 U 0.08 U 0.080 U Calcium 7440-70-2 T --µg/L 66800 63600 32400 30700 25600 28300 17100 21000 Chromium 7440-47-3 D --µg/L 20.4 14.7 0.28 J+0.50 U 0.72 J+0.29 J 1.2 J+0.29 J Chromium 7440-47-3 T -10 02L µg/L 25.3 16.1 0.38 J+0.47 J 0.48 J+0.18 J+2.6 0.89 Cobalt 7440-48-4 D --µg/L 0.32 J 0.3 J 0.91 0.30 J 0.5 U 0.5 U 0.5 U 0.50 U Cobalt 7440-48-4 T -1 IMAC µg/L 0.38 J 0.33 J 1 0.41 J 0.5 U 0.5 U 2.1 0.91 Copper 7440-50-8 D --µg/L 3.8 J+3.1 0.36 J+0.47 J 9.8 J+9.4 0.28 J+0.39 J Copper 7440-50-8 T -1000 02L µg/L 2.6 2.3 J+1 U 0.36 J 1 U 1 U 2 J+0.45 J Iron 7439-89-6 D --µg/L 50 U 50 U 150 220 50 U 50 U 50 U 50 U Iron 7439-89-6 T -300 02L µg/L 31 J 50 U 240 510 81 50 U 890 1100 Lead 7439-92-1 D --µg/L 0.058 J+0.19 0.1 U 0.049 J 1.2 J+1 0.1 UJ 0.10 U Lead 7439-92-1 T -15 02L µg/L 0.1 U 0.047 J+0.078 J 0.27 0.08 J 0.055 J 1.7 0.76 Magnesium 7439-95-4 T --µg/L 74.7 J 237 17400 16700 14900 15900 11500 14000 Manganese 7439-96-5 D --µg/L 5 U 5 U 920 540 110 120 21 20 Manganese 7439-96-5 T -50 02L µg/L 5 U 5 U 910 580 100 130 110 120 Mercury 7439-97-6 D --µg/L 0.2 U 0.2 U 0.2 U 0.20 U 0.2 U 0.2 U 0.2 U 0.20 U Mercury 7439-97-6 T -1 02L µg/L 0.2 U 0.2 U 0.2 U 0.20 U 0.2 U 0.2 U 0.2 U 0.20 U Methane 74-82-8 N --µg/L 2.2 J+1.5 J+5.4 J+10.0 UJ 1.4 J+2.3 J+3.6 J+1.4 J+ Molybdenum 7439-98-7 D --µg/L 13.2 14.9 1.2 0.58 0.32 J 0.15 J 0.5 U 0.50 U Molybdenum 7439-98-7 T --µg/L 18 16.5 1.2 0.56 0.3 J 0.5 U 0.11 J 0.50 U Nickel 7440-02-0 D --µg/L 0.18 J 0.37 J 2.3 J+0.17 J 0.46 J 0.39 J 0.8 J+0.42 J Nickel 7440-02-0 T -100 02L µg/L 0.4 J 1.9 J+0.52 J+0.36 J 0.24 J 0.5 U 2.4 J+1.1 Potassium 7440-09-7 T --µg/L 6500 6360 3170 J 5000 U 5000 U 5000 U 5000 U 5000 U Selenium 7782-49-2 D --µg/L 0.88 0.88 0.5 U 0.50 U 0.5 U 0.5 U 0.5 U 0.50 U Selenium 7782-49-2 T -20 02L µg/L 1.2 0.9 0.5 U 0.50 U 0.5 U 0.5 U 0.5 U 0.50 U Sodium 7440-23-5 T --µg/L 32400 32900 15700 16400 16500 16700 16000 17900 Strontium 7440-24-6 D --µg/L 120 98 250 270 260 230 200 230 Strontium 7440-24-6 T --µg/L 100 110 300 280 230 250 220 240 Thallium 7440-28-0 D --µg/L 0.1 U 0.1 U 0.1 U 0.10 U 0.1 U 0.1 U 0.1 U 0.10 U Thallium 7440-28-0 T -0.2 IMAC µg/L 0.017 J 0.017 J 0.1 U 0.10 U 0.1 U 0.1 U 0.019 J 0.10 U Vanadium 7440-62-2 D --µg/L 39.3 46.1 1 U 1.0 U 1 U 1 U 1 U 1.0 U Vanadium 7440-62-2 T -0.3 IMAC µg/L 45.8 43 1 U 0.46 J 1 U 1 U 2.6 0.82 J Zinc 7440-66-6 D --µg/L 12 10 U 10 U 3.1 J 10 U 10 U 10 UJ 5.5 J Zinc 7440-66-6 T -1000 02L µg/L 10 U 10 J+10 U 10 U 3.3 J+6 J 5.1 J+5.1 J Total Dissolved Solids TDS N -500000 02L µg/L 309000 338000 214000 212000 164000 204000 175000 191000 Total Organic Carbon TOC N --µg/L 1800 2000 620 J 1000 U 1000 U 23800 570 J 1000 U Total Suspended Solids TSS N --µg/L 2500 U 10800 2900 5200 2500 U 2500 U -62900 Alkalinity, CO3 ALK-CO3 N --µg/L 81600 85000 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N --µg/L 74200 5000 U 133000 126000 115000 125000 77600 80800 Alkalinity, lab ALK-LAB N --µg/L 156000 117000 133000 126000 115000 125000 77600 80800 Chloride 16887-00-6 N -250000 02L µg/L 6400 6600 5700 5400 6000 6000 6900 6700 Nitrite as N 14797-65-0 N -1000 02L µg/L -------- Nitrogen, NO2 plus NO3 NO2-NO3 N --µg/L 310 300 26 J+140 180 120 400 J+360 Sulfate 14808-79-8 N -250000 02L µg/L 86800 92400 39400 34900 34500 34300 41300 38700 Sulfide 18496-25-8 N --µg/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T -10 02L µg/L -------- Iron 7439-89-6 T -300 02L µg/L -------- Manganese 7439-96-5 D --µg/L -------- Manganese 7439-96-5 T -50 02L µg/L -------- As(III)7784-46-5 T --µg/L -------- As(V)10103-60-3 T --µg/L -------- Chromium (VI)18540-29-9 T -0.07 DHHS µg/L 24.9 16.9 --0.024 J+0.03 J -- Fe(II)1345-25-1 T --µg/L -------- Fe(III)1309-37-1 T --µg/L -------- Mn(II)1344-43-0 T --µg/L -------- Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 8 BG-1D BG-1D BG-5D BG-5D BG-5D BG-5D BG-5S BG-5S Round 3 Round 4 Round 1 Round 2 Round 3 Round 4 Round 1 Round 2 11/16/2015 12/15/2015 6/23/2015 9/9/2015 11/16/2015 12/15/2015 6/24/2015 9/9/2015 N N N N N N N N DR-BG-1D-NS-4Q15-1 DR-BG-1D-NS-4Q15-2 BG-5D DR-BG-5D-NS-3Q15 DR-BG-5D-NS-4Q15-1 DR-BG-5D-NS-4Q15-2 BG-5S DR-BG-5S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Mn(IV)1313-13-9 T --µg/L -------- Se(IV)10102-18-8 T --µg/L -------- Se(VI)13410-01-0 T --µg/L -------- Uranium, Natural 7440-61-1 T --µg/L --1.13 ---0.135 J - Radium-226 13982-63-3 T --pCi/L --0.897 ---1.22 - Radium-228 15262-20-1 T --pCi/L --1.46 ---3 U - Uranium-233 13968-55-3 T --µg/L --0.05 U ---0.05 U - Uranium-234 13966-29-5 T --µg/L --0.05 U ---0.05 U - Uranium-236 13982-70-2 T --µg/L --0.05 U ---0.05 U - Dissolved Oxygen DO N --mg/L 3.89 -0.27 0.3 0.28 --1.1 Temperature TEMP N --Deg C 13.1 -18.7 21.3 16 --16.8 pH PH N 6.5 8.5 02L SU 11.4 -7.06 7 6.69 --6.2 Turbidity, field TURB N --NTU 0.85 -3.81 7 1.05 --4 Specific Conductivity (field)SC N --µS/cm 632 -358 344.2 315.2 --271.3 Oxidation Reduction Potential ORP N --mV 37.3 -218.2 -52.3 54.9 --202.3 GW Depth (TOC)GW_DEPTH-TOC N --ft 16.06 --8.82 7.15 --10.22 Notes: µg/L = micrograms per liter µS/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 Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 3 of 8 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D --µg/L Aluminum 7429-90-5 T --µg/L Antimony 7440-36-0 D --µg/L Antimony 7440-36-0 T -1 IMAC µg/L Arsenic 7440-38-2 D --µg/L Arsenic 7440-38-2 T -10 02L µg/L Barium 7440-39-3 D --µg/L Barium 7440-39-3 T -700 02L µg/L Beryllium 7440-41-7 D --µg/L Beryllium 7440-41-7 T -4 IMAC µg/L Boron 7440-42-8 D --µg/L Boron 7440-42-8 T -700 02L µg/L Cadmium 7440-43-9 D --µg/L Cadmium 7440-43-9 T -2 02L µg/L Calcium 7440-70-2 T --µg/L Chromium 7440-47-3 D --µg/L Chromium 7440-47-3 T -10 02L µg/L Cobalt 7440-48-4 D --µg/L Cobalt 7440-48-4 T -1 IMAC µg/L Copper 7440-50-8 D --µg/L Copper 7440-50-8 T -1000 02L µg/L Iron 7439-89-6 D --µg/L Iron 7439-89-6 T -300 02L µg/L Lead 7439-92-1 D --µg/L Lead 7439-92-1 T -15 02L µg/L Magnesium 7439-95-4 T --µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T -50 02L µg/L Mercury 7439-97-6 D --µg/L Mercury 7439-97-6 T -1 02L µg/L Methane 74-82-8 N --µg/L Molybdenum 7439-98-7 D --µg/L Molybdenum 7439-98-7 T --µg/L Nickel 7440-02-0 D --µg/L Nickel 7440-02-0 T -100 02L µg/L Potassium 7440-09-7 T --µg/L Selenium 7782-49-2 D --µg/L Selenium 7782-49-2 T -20 02L µg/L Sodium 7440-23-5 T --µg/L Strontium 7440-24-6 D --µg/L Strontium 7440-24-6 T --µg/L Thallium 7440-28-0 D --µg/L Thallium 7440-28-0 T -0.2 IMAC µg/L Vanadium 7440-62-2 D --µg/L Vanadium 7440-62-2 T -0.3 IMAC µg/L Zinc 7440-66-6 D --µg/L Zinc 7440-66-6 T -1000 02L µg/L Total Dissolved Solids TDS N -500000 02L µg/L Total Organic Carbon TOC N --µg/L Total Suspended Solids TSS N --µg/L Alkalinity, CO3 ALK-CO3 N --µg/L Alkalinity, HCO3 ALK-HCO3 N --µg/L Alkalinity, lab ALK-LAB N --µg/L Chloride 16887-00-6 N -250000 02L µg/L Nitrite as N 14797-65-0 N -1000 02L µg/L Nitrogen, NO2 plus NO3 NO2-NO3 N --µg/L Sulfate 14808-79-8 N -250000 02L µg/L Sulfide 18496-25-8 N --µg/L Arsenic 7440-38-2 T -10 02L µg/L Iron 7439-89-6 T -300 02L µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T -50 02L µg/L As(III)7784-46-5 T --µg/L As(V)10103-60-3 T --µg/L Chromium (VI)18540-29-9 T -0.07 DHHS µg/L Fe(II)1345-25-1 T --µg/L Fe(III)1309-37-1 T --µg/L Mn(II)1344-43-0 T --µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: BG-5S BG-5S GWA-12D GWA-12D GWA-12D GWA-12D GWA-12S GWA-12S Round 3 Round 4 Round 1 Round 2 Round 3 Round 4 Round 1 Round 2 11/16/2015 12/15/2015 6/4/2015 9/9/2015 11/19/2015 12/15/2015 6/4/2015 9/11/2015 N N N N N N N N DR-BG-5S-NS-4Q15-1 DR-BG-5S-NS-4Q15-2 GWA-12D DR-GWA-12D-NS-3Q15 DR-GWA-12D-NS-4Q15-1DR-GWA-12D-NS-4Q15-2 GWA-12S DR-GWA-12S-NS-3Q15 140 92 J 298 100 U 100 U 100 U 21 100 U 130 100 U 5 U 81 J 100 51 J 190 350 0.5 U 0.5 U 1 U 0.16 J 0.18 J 0.5 U 1 U 0.5 U 0.5 U 0.5 U 1 U 0.19 J 0.18 J 0.5 U 1 U 0.5 U 0.5 U 0.5 U 2.54 2.3 2.1 2.1 1 U 0.14 J 0.5 U 0.5 U 3.71 2.7 2.2 2.2 1 U 0.16 J 11 10 23 16 22 19 53 46 12 11 17 16 22 21 55 54 0.2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 1 U 0.2 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 0.08 U 0.08 U 1 U 0.08 U 0.08 U 0.08 U 1 U 0.08 U 0.08 U 0.08 U 1 U 0.08 U 0.08 U 0.08 U 1 U 0.08 U 17600 17200 51700 54700 52000 48900 12200 10100 0.54 J+0.62 1 U 0.23 J 0.28 J 0.17 J 1 U 0.48 J 1 J+0.73 J+2.87 0.43 J+0.42 J 0.21 J 1.01 1.4 0.5 U 0.5 U 1 U 0.31 J 0.16 J 0.5 U 1 U 0.24 J 0.5 U 0.5 U 1 U 0.35 J 0.13 J 0.5 U 1 U 0.49 J 9.6 J+1.8 3.32 1 U 1 U 1 U 1 UJ 0.57 J 1 U 1 U 3.9 J+0.52 J 0.42 J 0.26 J 1 U 1.3 50 U 35 J 386 30 J 62 97 10 U 50 U 140 27 J 54 100 140 130 185 460 1.1 J+0.18 1 U 0.16 0.063 J 0.1 U 1 U 0.1 U 0.14 0.05 J 1.74 0.081 J 0.13 0.1 U 1 U 0.24 11400 11300 16400 18000 16700 16200 5960 6070 3.2 J 5 U 60 37 36 34 102 31 16 5 U 49 40 J+37 36 150 45 0.2 U 0.2 U 0.05 U 0.2 U 0.2 U 0.2 U 0.05 U 0.2 U 0.2 U 0.2 U 0.05 U 0.2 U 0.2 U 0.2 U 0.05 U 0.2 U 2.5 J+2.3 J+10 U 1.8 J+1.9 J+4.1 J+10 U 1.8 J+ 0.5 U 0.5 U 1.26 0.82 0.63 0.42 J 1 U 0.5 U 0.5 U 0.5 U 1.52 0.8 0.56 0.34 J 1 U 0.11 J 0.58 0.58 1 U 3 1.2 0.68 2.14 2.9 0.59 0.64 3.37 3.4 0.77 0.33 J 3.09 3.4 5000 U 5000 U 1000 5000 U 5000 U 5000 U 1690 5000 U 0.5 U 0.5 U 1 U 0.5 U 0.5 U 0.5 U 1 U 0.5 U 0.5 U 0.5 U 1 U 0.5 U 0.5 U 0.5 U 1 U 0.5 U 16700 16300 9470 9730 9060 8410 7920 7010 210 180 533 520 580 520 140 140 200 200 526 520 580 560 140 140 0.1 U 0.1 U 0.2 U 0.1 U 0.038 J 0.1 U 0.2 U 0.1 U 0.1 U 0.1 U 0.2 U 0.1 U 0.1 U 0.1 U 0.2 U 0.1 U 1 U 1 U 2.75 3 3.7 3.2 0.3 U 0.7 J 0.31 J 0.3 J 5.65 3.7 3.1 2.3 0.3 U 0.93 J 4.4 J 4.4 J 14 2.9 J 16 8.6 J 6 5.1 J 7.2 J+10 U 5 UJ 12 10 U 3.7 J+5 UJ 5.9 J 151000 187000 250000 257000 265000 261000 110000 105000 25800 550 J 202 J+1000 U 1000 U 1000 U 697 J+710 J 2500 U 2500 U 16000 7200 2600 U 2500 U 5000 U 3000 5000 U 5000 U 10000 U 5000 U 5000 U 5000 U 10000 U 5000 U 75100 70600 190000 196000 192000 174000 28000 11900 75100 70600 190000 196000 192000 174000 28000 11900 6800 6900 3900 3300 3700 3800 3000 1700 --178 ---808 - 440 430 -170 86 83 -580 37600 36700 16000 15300 18700 18500 41000 46100 100 U 100 U 500 U 100 U 100 U 100 U 100 U 100 U -------- -------- -------- -------- -------- -------- 0.35 0.41 ---0.021 J -- -------- -------- -------- Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 4 of 8 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Mn(IV)1313-13-9 T --µg/L Se(IV)10102-18-8 T --µg/L Se(VI)13410-01-0 T --µg/L Uranium, Natural 7440-61-1 T --µg/L Radium-226 13982-63-3 T --pCi/L Radium-228 15262-20-1 T --pCi/L Uranium-233 13968-55-3 T --µg/L Uranium-234 13966-29-5 T --µg/L Uranium-236 13982-70-2 T --µg/L Dissolved Oxygen DO N --mg/L Temperature TEMP N --Deg C pH PH N 6.5 8.5 02L SU Turbidity, field TURB N --NTU Specific Conductivity (field)SC N --µS/cm Oxidation Reduction Potential ORP N --mV GW Depth (TOC)GW_DEPTH-TOC N --ft Notes: µg/L = micrograms per liter µS/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 Ja 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 BG-5S BG-5S GWA-12D GWA-12D GWA-12D GWA-12D GWA-12S GWA-12S Round 3 Round 4 Round 1 Round 2 Round 3 Round 4 Round 1 Round 2 11/16/2015 12/15/2015 6/4/2015 9/9/2015 11/19/2015 12/15/2015 6/4/2015 9/11/2015 N N N N N N N N DR-BG-5S-NS-4Q15-1 DR-BG-5S-NS-4Q15-2 GWA-12D DR-GWA-12D-NS-3Q15 DR-GWA-12D-NS-4Q15-1DR-GWA-12D-NS-4Q15-2 GWA-12S DR-GWA-12S-NS-3Q15 -------- -------- -------- -------- -------- -------- -------- -------- -------- 0.88 -0.47 0.44 0.5 1.2 4.85 5.34 16.1 -17.7 20.7 17.8 16.6 18.3 23.4 6.2 -7.47 7.4 7.4 7.6 5.45 5.6 3.07 -8.35 4.9 7.13 2.5 2.38 87.1 256.4 -396.7 526 385.3 371.6 151.3 257.4 158.3 --81.4 -19.7 -69.7 -79.9 321 242.7 7.2 --34.69 -19.1 -16.76 Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 5 of 8 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D --µg/L Aluminum 7429-90-5 T --µg/L Antimony 7440-36-0 D --µg/L Antimony 7440-36-0 T -1 IMAC µg/L Arsenic 7440-38-2 D --µg/L Arsenic 7440-38-2 T -10 02L µg/L Barium 7440-39-3 D --µg/L Barium 7440-39-3 T -700 02L µg/L Beryllium 7440-41-7 D --µg/L Beryllium 7440-41-7 T -4 IMAC µg/L Boron 7440-42-8 D --µg/L Boron 7440-42-8 T -700 02L µg/L Cadmium 7440-43-9 D --µg/L Cadmium 7440-43-9 T -2 02L µg/L Calcium 7440-70-2 T --µg/L Chromium 7440-47-3 D --µg/L Chromium 7440-47-3 T -10 02L µg/L Cobalt 7440-48-4 D --µg/L Cobalt 7440-48-4 T -1 IMAC µg/L Copper 7440-50-8 D --µg/L Copper 7440-50-8 T -1000 02L µg/L Iron 7439-89-6 D --µg/L Iron 7439-89-6 T -300 02L µg/L Lead 7439-92-1 D --µg/L Lead 7439-92-1 T -15 02L µg/L Magnesium 7439-95-4 T --µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T -50 02L µg/L Mercury 7439-97-6 D --µg/L Mercury 7439-97-6 T -1 02L µg/L Methane 74-82-8 N --µg/L Molybdenum 7439-98-7 D --µg/L Molybdenum 7439-98-7 T --µg/L Nickel 7440-02-0 D --µg/L Nickel 7440-02-0 T -100 02L µg/L Potassium 7440-09-7 T --µg/L Selenium 7782-49-2 D --µg/L Selenium 7782-49-2 T -20 02L µg/L Sodium 7440-23-5 T --µg/L Strontium 7440-24-6 D --µg/L Strontium 7440-24-6 T --µg/L Thallium 7440-28-0 D --µg/L Thallium 7440-28-0 T -0.2 IMAC µg/L Vanadium 7440-62-2 D --µg/L Vanadium 7440-62-2 T -0.3 IMAC µg/L Zinc 7440-66-6 D --µg/L Zinc 7440-66-6 T -1000 02L µg/L Total Dissolved Solids TDS N -500000 02L µg/L Total Organic Carbon TOC N --µg/L Total Suspended Solids TSS N --µg/L Alkalinity, CO3 ALK-CO3 N --µg/L Alkalinity, HCO3 ALK-HCO3 N --µg/L Alkalinity, lab ALK-LAB N --µg/L Chloride 16887-00-6 N -250000 02L µg/L Nitrite as N 14797-65-0 N -1000 02L µg/L Nitrogen, NO2 plus NO3 NO2-NO3 N --µg/L Sulfate 14808-79-8 N -250000 02L µg/L Sulfide 18496-25-8 N --µg/L Arsenic 7440-38-2 T -10 02L µg/L Iron 7439-89-6 T -300 02L µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T -50 02L µg/L As(III)7784-46-5 T --µg/L As(V)10103-60-3 T --µg/L Chromium (VI)18540-29-9 T -0.07 DHHS µg/L Fe(II)1345-25-1 T --µg/L Fe(III)1309-37-1 T --µg/L Mn(II)1344-43-0 T --µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-12S GWA-9D GWA-9D GWA-9D GWA-9D GWA-9S GWA-9S GWA-9S Round 4 Round 1 Round 2 Round 3 Round 4 Round 1 Round 2 Round 3 12/18/2015 6/15/2015 9/9/2015 11/16/2015 12/15/2015 6/19/2015 9/9/2015 11/16/2015 N N N N N N N N DR-GWA-12S-NS-4Q15-2 GWA-9D DR-GWA-9D-NS-3Q15 DR-GWA-9D-NS-4Q15-1 DR-GWA-9D-NS-4Q15-2 GWA-9S DR-GWA-9S-NS-3Q15 DR-GWA-9S-NS-4Q15-1 100 U 10 U 100 U 100 U 100 U 100 U 100 U 100 U 560 1270 100 U 210 100 U 4300 630 300 0.2 J 0.5 U 0.5 U 0.5 U 0.5 U 0.19 J 0.5 U 0.5 U 0.19 J 0.5 U 0.5 U 0.5 U 0.5 U 0.22 J 0.5 U 0.5 U 0.5 U 2.1 0.69 0.77 0.74 0.5 U 0.5 U 0.5 U 0.48 J 2.3 0.67 0.84 0.84 0.63 0.5 U 0.5 U 34 24 20 14 12 5 U 10 11 41 23 21 15 13 42 17 14 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.077 J 0.21 0.18 J 0.081 J 0.085 J 0.2 U 0.2 U 0.2 U 0.67 0.23 0.21 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 38 J 50 U 50 U 50 U 50 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.038 J 0.027 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.036 J 0.034 J 0.053 J 7210 17700 14200 8270 7150 1050 584 835 J+ 0.65 J+0.25 J 0.34 J 0.5 U 0.5 U 0.27 J+0.57 0.49 J+ 3.4 2.9 1.2 J+2.5 J+1.4 J+3.5 0.97 J+0.82 J+ 0.26 J 0.51 0.36 J 0.76 0.81 1.5 4.5 5.5 0.47 J 1.2 0.38 J 0.9 0.88 9.3 4.7 6.7 2.8 J+1 U 1.9 0.6 J+0.72 J+1 UJ 5 9.2 J+ 1.4 J+2.1 J+1 U 0.4 J 0.47 J 4.5 J+1.4 1.5 50 U 1390 1800 2000 2100 50 U 50 U 50 U 890 3290 2000 2600 2300 5100 750 290 0.23 0.1 U 0.13 0.085 J+0.12 J+0.1 U 0.51 0.95 J+ 0.35 0.67 J+0.1 U 0.32 0.14 4.3 0.38 0.39 4370 3050 2620 2260 2030 890 558 753 27 590 690 660 480 36 100 140 37 640 720 620 530 220 110 140 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 0.072 J 0.2 U 0.2 U 0.2 U 0.073 J+0.2 U 0.2 U 3.2 J+10 U 3 J+2.6 J+1.9 J+2.3 J+2.7 J+1.7 J+ 0.5 U 0.27 J 0.12 J 0.21 J 0.5 U 0.5 U 0.5 U 0.5 U 0.1 J 0.52 0.12 J 0.27 J 0.5 U 0.3 J 0.5 U 0.5 U 2.8 1.2 J+0.98 2.4 2 0.66 J+2.9 3.1 3.7 3.2 J+1.2 3.7 2.5 6.1 J+2.9 3.9 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.26 J 0.5 U 0.5 U 0.5 U 0.5 U 0.56 0.5 U 0.5 U 5630 6140 5510 5000 4850 J 6980 5390 5960 94 63 52 33 25 3.1 J 8.1 9.5 100 64 55 31 27 21 9.1 9.3 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.034 J 0.1 U 0.1 U 0.42 J 1 U 1 U 1 U 1 U 1 U 1 U 1 U 2.4 J+1.8 1 U 0.38 J 0.39 J 5.1 0.59 J 0.65 J 16 3.9 J+10 U 8.7 J 3.1 J 5.1 J+12 13 6.9 J 8.9 J+10 U 12 J+16 20 16 11 J+ 87000 113000 91000 42000 90000 161000 50000 36000 1300 1000 U 17500 1000 U 1000 U 14200 1000 U 1000 U 2500 U 16100 5000 U 5800 5900 239000 30200 6900 5000 U 10000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 6000 57000 47600 32000 25400 9100 5700 4900 J 6000 57000 47600 32000 25400 9100 5700 4900 J 2700 2000 2100 2900 3100 4200 4000 4100 -------- 790 20 U 20 U 20 U 20 U 48 36 31 32400 4200 4300 6000 6000 650 J 2700 6400 100 U 500 U 100 U 100 U 100 U 100 U 100 U 100 U -------- -------- -------- -------- -------- -------- 0.26 --0.03 U 0.03 U --0.083 -------- -------- -------- Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 6 of 8 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Mn(IV)1313-13-9 T --µg/L Se(IV)10102-18-8 T --µg/L Se(VI)13410-01-0 T --µg/L Uranium, Natural 7440-61-1 T --µg/L Radium-226 13982-63-3 T --pCi/L Radium-228 15262-20-1 T --pCi/L Uranium-233 13968-55-3 T --µg/L Uranium-234 13966-29-5 T --µg/L Uranium-236 13982-70-2 T --µg/L Dissolved Oxygen DO N --mg/L Temperature TEMP N --Deg C pH PH N 6.5 8.5 02L SU Turbidity, field TURB N --NTU Specific Conductivity (field)SC N --µS/cm Oxidation Reduction Potential ORP N --mV GW Depth (TOC)GW_DEPTH-TOC N --ft Notes: µg/L = micrograms per liter µS/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 Ja 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 GWA-12S GWA-9D GWA-9D GWA-9D GWA-9D GWA-9S GWA-9S GWA-9S Round 4 Round 1 Round 2 Round 3 Round 4 Round 1 Round 2 Round 3 12/18/2015 6/15/2015 9/9/2015 11/16/2015 12/15/2015 6/19/2015 9/9/2015 11/16/2015 N N N N N N N N DR-GWA-12S-NS-4Q15-2 GWA-9D DR-GWA-9D-NS-3Q15 DR-GWA-9D-NS-4Q15-1 DR-GWA-9D-NS-4Q15-2 GWA-9S DR-GWA-9S-NS-3Q15 DR-GWA-9S-NS-4Q15-1 -------- -------- -------- -------- -------- -------- -------- -------- -------- -0.16 0.12 0.31 0.5 4.17 4.52 1.61 -26.1 16.7 18.2 14.5 23.8 19 16.3 -6.4 6.2 6.1 5.8 5.55 5.1 5.3 -16.28 0.9 9.97 1.9 235.9 7.2 9.24 -141.9 157.4 89.6 84.4 39.3 48.1 45.2 -90.8 69.8 1.5 42 331.5 287 241.6 --34.66 -28.1 -34.58 - Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 7 of 8 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D --µg/L Aluminum 7429-90-5 T --µg/L Antimony 7440-36-0 D --µg/L Antimony 7440-36-0 T -1 IMAC µg/L Arsenic 7440-38-2 D --µg/L Arsenic 7440-38-2 T -10 02L µg/L Barium 7440-39-3 D --µg/L Barium 7440-39-3 T -700 02L µg/L Beryllium 7440-41-7 D --µg/L Beryllium 7440-41-7 T -4 IMAC µg/L Boron 7440-42-8 D --µg/L Boron 7440-42-8 T -700 02L µg/L Cadmium 7440-43-9 D --µg/L Cadmium 7440-43-9 T -2 02L µg/L Calcium 7440-70-2 T --µg/L Chromium 7440-47-3 D --µg/L Chromium 7440-47-3 T -10 02L µg/L Cobalt 7440-48-4 D --µg/L Cobalt 7440-48-4 T -1 IMAC µg/L Copper 7440-50-8 D --µg/L Copper 7440-50-8 T -1000 02L µg/L Iron 7439-89-6 D --µg/L Iron 7439-89-6 T -300 02L µg/L Lead 7439-92-1 D --µg/L Lead 7439-92-1 T -15 02L µg/L Magnesium 7439-95-4 T --µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T -50 02L µg/L Mercury 7439-97-6 D --µg/L Mercury 7439-97-6 T -1 02L µg/L Methane 74-82-8 N --µg/L Molybdenum 7439-98-7 D --µg/L Molybdenum 7439-98-7 T --µg/L Nickel 7440-02-0 D --µg/L Nickel 7440-02-0 T -100 02L µg/L Potassium 7440-09-7 T --µg/L Selenium 7782-49-2 D --µg/L Selenium 7782-49-2 T -20 02L µg/L Sodium 7440-23-5 T --µg/L Strontium 7440-24-6 D --µg/L Strontium 7440-24-6 T --µg/L Thallium 7440-28-0 D --µg/L Thallium 7440-28-0 T -0.2 IMAC µg/L Vanadium 7440-62-2 D --µg/L Vanadium 7440-62-2 T -0.3 IMAC µg/L Zinc 7440-66-6 D --µg/L Zinc 7440-66-6 T -1000 02L µg/L Total Dissolved Solids TDS N -500000 02L µg/L Total Organic Carbon TOC N --µg/L Total Suspended Solids TSS N --µg/L Alkalinity, CO3 ALK-CO3 N --µg/L Alkalinity, HCO3 ALK-HCO3 N --µg/L Alkalinity, lab ALK-LAB N --µg/L Chloride 16887-00-6 N -250000 02L µg/L Nitrite as N 14797-65-0 N -1000 02L µg/L Nitrogen, NO2 plus NO3 NO2-NO3 N --µg/L Sulfate 14808-79-8 N -250000 02L µg/L Sulfide 18496-25-8 N --µg/L Arsenic 7440-38-2 T -10 02L µg/L Iron 7439-89-6 T -300 02L µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T -50 02L µg/L As(III)7784-46-5 T --µg/L As(V)10103-60-3 T --µg/L Chromium (VI)18540-29-9 T -0.07 DHHS µg/L Fe(II)1345-25-1 T --µg/L Fe(III)1309-37-1 T --µg/L Mn(II)1344-43-0 T --µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-9S MW-23BR MW-23BR MW-23BR MW-23D MW-23D Round 4 Round 1 Round 2 Round 4 Round 1 Round 4 12/15/2015 6/1/2015 9/10/2015 12/15/2015 6/30/2015 12/15/2015 N N N N N N DR-GWA-9S-NS-4Q15-2 MW-23BR DR-MW-23BR-NS-3Q15 DR-MW-23BR-NS-4Q15-2 MW-23D DR-MW-23D-NS-4Q15-2 85 J 75 100 U 100 U 100 U 88 J 300 8 100 U 66 J 180 100 U 0.5 U 1.16 0.50 U 0.5 U 0.5 U 0.5 U 0.5 U 1.21 0.50 U 0.5 U 0.5 U 0.5 U 0.5 U 6.29 1.2 0.69 0.33 J 0.3 J 0.5 U 6.36 1.1 0.65 0.27 J 0.33 J 11 132 120 110 94 72 14 136 120 120 80 16 0.18 J 1 U 0.20 U 0.2 U 0.2 U 0.2 U 0.19 J 1 U 0.20 U 0.2 U 0.2 U 0.2 U 50 U 50 U 28 J 32 J 50 U 50 U 50 U 50 U 29 J 50 U 50 U 50 U 0.04 J 1 U 0.080 U 0.08 U 0.08 U 0.08 U 0.037 J 1 U 0.080 U 0.08 U 0.08 U 0.08 U 1130 53700 48500 54500 61100 59000 0.23 J+1 U 0.25 J 0.21 J 0.22 J 0.34 J 0.58 J+1 U 0.50 U 0.5 U 0.26 J+1.5 6.7 1 U 0.50 U 0.5 U 0.22 J 0.18 J 6.5 1 U 0.50 U 0.5 U 0.25 J 0.3 J 7.6 J+1 U 1.0 U 1 U 0.27 J+1.4 1.8 8.46 1.2 0.27 J 0.88 J+0.87 J 44 J 57 1100 1100 J 50 U 69 370 138 1000 1200 J 110 48 J 0.8 J+1 U 0.10 U 0.1 U 0.1 U 0.1 U 0.25 1 U 0.10 U 0.1 U 0.057 J+0.24 896 18900 18900 19400 13600 13000 140 31 30 27 300 110 160 32 29 30 280 25 0.2 U 0.05 U 0.20 U 0.2 U 0.2 U 0.2 U 0.2 U 0.05 U 0.20 UJ 0.2 U 0.2 U 0.2 U 1.9 J+10 UJ 55.7 45.5 1.8 J+55.5 0.5 U 2.51 1.6 1.1 0.57 0.48 J 0.5 U 2.52 1.6 1.1 0.41 J 0.12 J 3.7 1 U 0.50 U 0.25 J 0.47 J 1.5 3.9 1 U 0.50 U 0.47 J 0.49 J+1 5000 U 654 5000 U 5000 U 5000 U 5000 U 0.5 U 1 U 0.50 U 0.5 U 0.5 U 0.5 U 0.5 U 1 U 0.50 U 0.5 U 0.5 U 0.5 U 6460 13200 15200 14000 7300 6400 13 1930 2100 1700 890 480 15 1940 1900 1900 740 110 0.1 U 0.2 U 0.10 U 0.1 U 0.1 U 0.023 J 0.1 U 0.55 0.10 U 0.1 U 0.1 U 0.1 U 1 U 1.15 1.0 U 1 U 1 U 1 U 0.74 J 1.38 1.0 U 0.31 J 1 U 1.2 10 14 10 U 19 31 4.7 J 16 7 10 U 16 J+27 2.6 J 36000 270000 266000 276000 252000 279000 1000 U 148 1000 U 29000 J 520 J 1000 U 5900 5000 U 2500 U 2600 U 2500 U 3500 5000 U 10000 U 5000 U 5000 U 5000 U 5000 U 7800 220000 203000 233000 205000 168000 7800 220000 203000 J-233000 J 205000 168000 4200 3300 3800 4100 8000 J+5200 -10 U ---- 42 J+-20 U 20 U 20 UJ 36 7000 12000 8400 11000 29800 27700 100 U 100 U 180 100 U 100 U 100 U ---0.58 -0.5 U ---516 -100 ---31.4 -193 ---32.2 J+-272 J+ ---0.456 J 0.2 U 0.5 U ---0.5 U 0.203 0.5 U 0.027 J --0.014 J 0.089 J 1.1 ---476 J 20 U 46.6 J- ----20 U - ----53.4 J - Table 2-5 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 8 of 8 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Mn(IV)1313-13-9 T --µg/L Se(IV)10102-18-8 T --µg/L Se(VI)13410-01-0 T --µg/L Uranium, Natural 7440-61-1 T --µg/L Radium-226 13982-63-3 T --pCi/L Radium-228 15262-20-1 T --pCi/L Uranium-233 13968-55-3 T --µg/L Uranium-234 13966-29-5 T --µg/L Uranium-236 13982-70-2 T --µg/L Dissolved Oxygen DO N --mg/L Temperature TEMP N --Deg C pH PH N 6.5 8.5 02L SU Turbidity, field TURB N --NTU Specific Conductivity (field)SC N --µS/cm Oxidation Reduction Potential ORP N --mV GW Depth (TOC)GW_DEPTH-TOC N --ft Notes: µg/L = micrograms per liter µS/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 Ja 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 GWA-9S MW-23BR MW-23BR MW-23BR MW-23D MW-23D Round 4 Round 1 Round 2 Round 4 Round 1 Round 4 12/15/2015 6/1/2015 9/10/2015 12/15/2015 6/30/2015 12/15/2015 N N N N N N DR-GWA-9S-NS-4Q15-2 MW-23BR DR-MW-23BR-NS-3Q15 DR-MW-23BR-NS-4Q15-2 MW-23D DR-MW-23D-NS-4Q15-2 ----311 J - ---2 UJ 0.5 U 2 U ---2 UJ 0.5 UJ 2 U ------ ------ ------ ------ ------ ------ 1.6 3.05 0.16 0.41 1.44 1.86 19.5 21.8 21.9 12.1 19.8 14.8 5.3 7.45 7.5 7.5 6.89 5.95 8.2 0.22 6.1 1.2 51.69 9.73 54.9 474.3 716 451.8 438.2 385.3 211.3 6 -146.7 -141.6 146.5 68.8 28.19 ----15.48 Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 8 GWA-12D GWA-12D GWA-12S GWA-12S GWA-6S GWA-7D GWA-7D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/4/2015 9/9/2015 6/4/2015 9/11/2015 9/12/2015 6/16/2015 9/10/2015 N N N N N N N GWA-12D DR-GWA-12D-NS-3Q15 GWA-12S DR-GWA-12S-NS-3Q15 DR-GWA-6S-NS-3Q15 GWA-7D DR-GWA-7D-NS-3Q15 Constituent Fractio CAS RN Criteria Min Groundwate Criteria Unit Aluminum D 7429-90-5 --NS µg/L 298 100 U 21 100 U 100 U 9.1 J 100 U Aluminum T 7429-90-5 --NS µg/L 5 U 81 J 190 350 220 117 130 Antimony D 7440-36-0 --NS µg/L 1 U 0.16 J 1 U 0.5 U 0.5 U 0.5 U 0.2 J Antimony T 7440-36-0 --1 IMAC µg/L 1 U 0.19 J 1 U 0.5 U 0.5 U 0.5 U 0.2 J Arsenic D 7440-38-2 --NS µg/L 2.54 2.3 1 U 0.14 J 3.1 0.5 U 0.5 U Arsenic T 7440-38-2 --10 02L µg/L 3.71 2.7 1 U 0.16 J 2.9 0.13 J 0.5 U Barium D 7440-39-3 --NS µg/L 23 16 53 46 210 23 19 Barium T 7440-39-3 --700 02L µg/L 17 16 55 54 220 24 19 Beryllium D 7440-41-7 --NS µg/L 1 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U Beryllium T 7440-41-7 --4 IMAC µg/L 1 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U Boron D 7440-42-8 --NS µg/L 50 U 50 U 50 U 50 U 710 50 U 50 U Boron T 7440-42-8 --700 02L µg/L 50 U 50 U 50 U 50 U 700 50 UJ 50 U Cadmium D 7440-43-9 --NS µg/L 1 U 0.08 U 1 U 0.08 U 0.08 U 0.08 U 0.08 U Cadmium T 7440-43-9 --2 02L µg/L 1 U 0.08 U 1 U 0.08 U 0.08 U 0.08 U 0.08 U Calcium T 7440-70-2 --NS µg/L 51700 54700 12200 10100 83000 26900 22800 Chromium D 7440-47-3 --NS µg/L 1 U 0.23 J 1 U 0.48 J 0.45 J 0.25 J+1.3 Chromium T 7440-47-3 --10 02L µg/L 2.87 0.43 J+1.01 1.4 0.75 J+0.51 J+0.54 J+ Cobalt D 7440-48-4 --NS µg/L 1 U 0.31 J 1 U 0.24 J 1.6 2.8 2.7 Cobalt T 7440-48-4 --1 IMAC µg/L 1 U 0.35 J 1 U 0.49 J 1.8 2.8 2.8 Copper D 7440-50-8 --NS µg/L 3.32 1 U 1 UJ 0.57 J 0.29 J 0.22 J+1 U Copper T 7440-50-8 --1000 02L µg/L 3.9 J+0.52 J 1 U 1.3 0.39 J 0.39 J+0.25 J+ Iron D 7439-89-6 --NS µg/L 386 30 J 10 U 50 U 13600 1390 1700 Iron T 7439-89-6 --300 02L µg/L 54 100 185 460 15200 1610 1800 Lead D 7439-92-1 --NS µg/L 1 U 0.16 1 U 0.1 U 0.1 U 0.1 UJ 0.063 J Lead T 7439-92-1 --15 02L µg/L 1.74 0.081 J 1 U 0.24 0.077 J 0.13 J+0.11 Magnesium T 7439-95-4 --NS µg/L 16400 18000 5960 6070 12500 13300 12900 Manganese D 7439-96-5 --NS µg/L 60 37 102 31 3700 1100 960 Manganese T 7439-96-5 --50 02L µg/L 49 40 J+150 45 3800 1000 910 Mercury D 7439-97-6 --NS µg/L 0.05 U 0.2 U 0.05 U 0.2 U 0.2 U 0.2 UJ 0.2 U Mercury T 7439-97-6 --1 02L µg/L 0.05 U 0.2 U 0.05 U 0.2 U 0.2 U 0.2 UJ 0.2 UJ Methane N 74-82-8 --NS µg/L 10 U 1.8 J+10 U 1.8 J+2740 10 U 1.8 J Molybdenum D 7439-98-7 --NS µg/L 1.26 0.82 1 U 0.5 U 8.6 0.14 J 0.5 U Molybdenum T 7439-98-7 --NS µg/L 1.52 0.8 1 U 0.11 J 8 0.11 J 0.5 U Nickel D 7440-02-0 --NS µg/L 1 U 3 2.14 2.9 1.8 1.4 J+1.7 Nickel T 7440-02-0 --100 02L µg/L 3.37 3.4 3.09 3.4 1.9 2.1 J+1.3 J+ Potassium T 7440-09-7 --NS µg/L 1000 5000 U 1690 5000 U 10700 5000 U 5000 U Selenium D 7782-49-2 --NS µg/L 1 U 0.5 U 1 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium T 7782-49-2 --20 02L µg/L 1 U 0.5 U 1 U 0.5 U 0.5 U 0.5 U 0.5 U Sodium T 7440-23-5 --NS µg/L 9470 9730 7920 7010 26200 25900 22900 Strontium D 7440-24-6 --NS µg/L 533 520 140 140 680 290 290 Strontium T 7440-24-6 --NS µg/L 526 520 140 140 710 290 280 Thallium D 7440-28-0 --NS µg/L 0.2 U 0.1 U 0.2 U 0.1 U 0.1 U 0.1 UJ 0.1 U Thallium T 7440-28-0 --0.2 IMAC µg/L 0.2 U 0.1 U 0.2 U 0.1 U 0.1 UJ 0.1 UJ 0.1 U Vanadium D 7440-62-2 --NS µg/L 2.75 3 0.3 U 0.7 J 1.2 1 U 1 U Vanadium T 7440-62-2 --0.3 IMAC µg/L 5.65 3.7 0.3 U 0.93 J 1.1 0.3 J 1 U Zinc D 7440-66-6 --NS µg/L 14 2.9 J 6 5.1 J 13 2.6 J 12 Zinc T 7440-66-6 --1000 02L µg/L 5 UJ 12 5 UJ 5.9 J 4.8 J 3.5 J 10 J+ Total Dissolved Solid N TDS --500000 02L µg/L 250000 257000 110000 105000 340000 242000 233000 Total Organic Carbon N TOC --NS µg/L 202 J+1000 U 697 J+710 J 7800 590 J 1000 U Total Suspended Sol N TSS --NS µg/L 16000 7200 5000 U 3000 371000 4300 5000 U Alkalinity, CO3 N ALK-CO3 --NS µg/L 10000 U 5000 U 10000 U 5000 U 5000 UJ 10000 U 5000 U Alkalinity, HCO3 N ALK-HCO3 --NS µg/L 190000 196000 28000 11900 317000 59000 53900 Alkalinity, lab N ALK-LAB --NS µg/L 190000 196000 28000 11900 317000 59000 53900 Chloride N 16887-00-6 --250000 02L µg/L 3900 3300 3000 1700 18900 3000 3000 Nitrite as N N 14797-65-0 --1000 02L µg/L 178 808 Nitrogen, NO2 plus N N NO2-NO3 --NS µg/L 170 580 16 J-20 U 20 U Sulfate N 14808-79-8 --250000 02L µg/L 16000 15300 41000 46100 2300 98200 98600 Sulfide N 18496-25-8 --NS µg/L 500 U 100 U 100 U 100 U 100 U 100 U 100 U As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 8 GWA-12D GWA-12D GWA-12S GWA-12S GWA-6S GWA-7D GWA-7D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/4/2015 9/9/2015 6/4/2015 9/11/2015 9/12/2015 6/16/2015 9/10/2015 N N N N N N N GWA-12D DR-GWA-12D-NS-3Q15 GWA-12S DR-GWA-12S-NS-3Q15 DR-GWA-6S-NS-3Q15 GWA-7D DR-GWA-7D-NS-3Q15 Constituent Fractio CAS RN Criteria Min Groundwate Criteria Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L 0.47 0.44 4.85 5.34 0.2 2.21 0.2 Temp (Celcius)N TEMP --NS Deg C 17.7 20.7 18.3 23.4 21.1 29.8 22.9 pH (field)N PH 6.5 8.5 02L SU 7.47 7.4 5.45 5.6 6.8 6.01 6.2 Turbidity, field N TURB --NS NTU 8.35 4.9 2.38 87.1 140.2 8.58 9.3 Spec. Cond. (field)N SC --NS µS/cm 396.7 526 151.3 257.4 687 353.2 252.1 Oxidation Reduction N ORP --NS mV -81.4 -19.7 321 242.7 -92.1 129 -74.6 GW Depth (TOC)N GW_DEPTH-TOC --NS ft 33.28 16.76 19.7 20.5 Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 3 of 8 Constituent Fractio CAS RN Criteria Min Groundwate Criteria Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solid N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Sol N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus N N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-7S GWA-7S GWA-8D GWA-8D GWA-8S GWA-9D GWA-9D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/19/2015 9/10/2015 6/5/2015 9/9/2015 6/18/2015 6/15/2015 9/9/2015 N N N N N N N GWA-7S DR-GWA-7S-NS-3Q15 GWA-8D DR-GWA-8D-NS-3Q15 GWA-8S_N_WG_20150618 GWA-9D DR-GWA-9D-NS-3Q15 420 730 6.4 J 100 U 100 U 10 U 100 U 600 850 769 300 150 1270 100 U 0.5 U 0.63 0.6 0.5 U 0.22 J 0.5 U 0.5 U 0.23 J 0.6 0.71 0.5 U 0.16 J 0.5 U 0.5 U 0.5 U 0.5 U 1.2 0.98 0.6 2.1 0.69 0.5 U 0.5 U 1.4 0.86 0.57 2.3 0.67 25 32 29 32 19 24 20 28 33 34 34 19 23 21 4.7 6.7 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 3.7 7.7 0.2 U 0.2 U 0.2 U 0.085 J 0.2 U 38 J+50 U 50 U 50 U 39 J+50 U 50 U 50 U 50 U 50 U 50 U 34 J 50 U 50 U 0.46 0.42 0.08 U 0.08 U 0.081 0.08 U 0.08 U 0.37 0.43 0.027 J 0.08 UJ 0.08 U 0.08 U 0.08 U 25800 23500 130000 124000 39600 17700 14200 0.95 J+0.87 0.9 J+1.1 0.46 J 0.25 J 0.34 J 1.9 2 J+3.2 3.4 J+0.95 2.9 1.2 J+ 19.2 13.4 0.14 J 0.5 U 8.6 0.51 0.36 J 17.7 14.6 0.26 J 0.19 J 9.7 1.2 0.38 J 1 UJ 2.4 5 J+0.32 J 0.37 J 1 U 1.9 1.2 J+2.4 J+1.7 J+0.88 J+0.42 J 2.1 J+1 U 50 U 50 U 50 U 140 50 U 1390 1800 310 61 413 420 190 3290 2000 0.1 U 0.056 J 0.46 0.1 U 0.1 U 0.1 U 0.13 0.18 J+0.095 J 0.81 0.37 J+0.068 J 0.67 J+0.1 U 18600 18000 29200 34200 24800 3050 2620 1000 1100 1000 1600 2700 590 690 950 1200 1200 1700 1700 640 720 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.085 J+0.2 UJ 0.2 U 0.2 U 0.2 U 0.072 J 0.2 U 1.9 J+2.4 J 28 8.8 J+6.6 J+10 U 3 J+ 0.5 U 0.2 J 3.1 2.4 0.73 0.27 J 0.12 J 0.14 J 0.16 J 3.4 2.3 0.73 0.52 0.12 J 51.1 39.6 0.51 J+0.81 6.1 1.2 J+0.98 46.9 42 1.4 J+1.8 J+5.8 3.2 J+1.2 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 0.62 0.84 0.69 0.5 U 0.5 U 0.5 U 0.5 U 0.86 0.88 1.1 0.5 U 0.5 U 0.5 U 0.5 U 18700 21400 29900 32900 40400 6140 5510 780 710 630 730 460 63 52 800 740 700 760 420 64 55 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.018 J 0.1 U 0.1 U 0.1 U 0.1 U 1 U 0.4 J 3.2 0.41 J 1 UJ 1 U 1 U 0.38 J 1 U 5.2 1.3 0.45 J 1.8 1 U 560 490 10 U 10 U 7.8 J 3.9 J+10 U 390 500 3.4 J+10 UJ 13 8.9 J+10 U 318000 287000 690000 J-726000 397000 113000 91000 980 J 750 J 1100 970 J 1200 1000 U 17500 38000 3000 13000 J+6700 18900 16100 5000 U 5000 U 5000 U 10000 U 5000 U 5000 U 10000 U 5000 U 5500 2100 J 120000 129000 61800 57000 47600 5500 2100 J 120000 129000 61800 57000 47600 2400 3000 4700 4000 5500 2000 2100 370 1100 20 U 20 U 20 U 20 U 20 U 176000 170000 368000 346000 181000 4200 4300 100 U 100 U 500 U 100 U 100 U 500 U 100 U Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 4 of 8 Constituent Fractio CAS RN Criteria Min Groundwate Criteria Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 GWA-7S GWA-7S GWA-8D GWA-8D GWA-8S GWA-9D GWA-9D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/19/2015 9/10/2015 6/5/2015 9/9/2015 6/18/2015 6/15/2015 9/9/2015 N N N N N N N GWA-7S DR-GWA-7S-NS-3Q15 GWA-8D DR-GWA-8D-NS-3Q15 GWA-8S_N_WG_20150618 GWA-9D DR-GWA-9D-NS-3Q15 4.89 2.1 3.46 0.95 0.16 0.12 25 30.1 23.6 19 26.1 16.7 5.39 4.9 7.81 7.35 6.4 6.2 9 6.6 9.74 17.1 16.28 0.9 394.9 419.6 839 950 141.9 157.4 342.9 24.9 78.9 -75 90.8 69.8 19.21 34.68 Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 5 of 8 Constituent Fractio CAS RN Criteria Min Groundwate Criteria Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solid N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Sol N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus N N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-9S GWA-9S MW-12 MW-12 MW-12D MW-12D MW-20D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/19/2015 9/9/2015 6/20/2015 9/9/2015 6/20/2015 9/9/2015 6/24/2015 N N N N N N N GWA-9S DR-GWA-9S-NS-3Q15 MW-12 DR-MW-12-NS-3Q15 MW-12D DR-MW-12D-NS-3Q15 MW-20D 100 U 100 U 100 U 100 U 100 U 100 U 100 U 4300 630 990 180 960 59 J 130 0.19 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.22 J 0.5 U 0.18 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.42 J 0.38 J 0.44 J 0.35 J 0.58 0.63 0.5 U 0.71 0.28 J 0.44 J 0.24 J 0.91 5 U 10 5.8 5.9 20 19 56 42 17 10 6.7 29 21 66 0.077 J 0.21 0.11 J 0.11 J 0.2 U 0.2 U 0.2 U 0.67 0.23 0.22 0.14 J 0.11 J 0.2 U 0.2 U 50 U 50 U 33 J+50 U 50 U 50 U 26 J 50 U 50 U 50 U 50 U 50 U 50 U 35 J 0.08 U 0.038 J 0.074 J 0.08 U 0.052 J 0.08 U 0.08 U 0.036 J 0.034 J 0.05 J 0.052 J 0.08 U 0.08 U 0.08 U 1050 584 2440 3200 12800 12700 43400 0.27 J+0.57 0.41 J+0.18 J 0.2 J+0.48 J 0.5 UJ 3.5 0.97 J+2.6 J+0.59 J+1.4 J+0.52 J+0.47 J 1.5 4.5 9.9 9.3 4.5 4.3 0.5 U 9.3 4.7 10.1 8.9 4.8 4.6 0.5 U 1 UJ 5 3.1 J+2.9 0.25 J+0.53 J 1 U 4.5 J+1.4 10.6 3.2 1.7 J+0.38 J 1 U 50 U 50 U 1900 2400 4800 4500 50 U 5100 750 3600 2900 6100 4900 200 0.1 U 0.51 0.11 J+0.19 0.1 U 0.1 U 0.1 U 4.3 0.38 4.5 1.4 0.51 0.087 J 0.094 J 890 558 4680 5090 8110 7860 11000 36 100 440 450 1300 1300 470 220 110 450 470 1400 1400 500 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.073 J+0.2 U 0.072 J+0.2 U 0.2 U 0.2 U 0.2 U 2.3 J+2.7 J+3.4 J+4.9 J+2.3 J+2.9 J+12.8 0.5 U 0.5 U 0.15 J 0.1 J 0.16 J 0.11 J 0.22 J 0.3 J 0.5 U 0.2 J 0.15 J 0.2 J 0.15 J 0.22 J 0.66 J+2.9 9.7 9.4 5 4.8 0.5 U 6.1 J+2.9 11.2 9.8 5.7 5.2 0.19 J 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.56 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 6980 5390 4970 J 5490 13100 11200 10600 3.1 J 8.1 9.2 11 46 51 460 21 9.1 10 12 51 53 520 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.034 J 0.1 U 0.017 J 0.019 J 0.1 U 0.1 U 0.1 U 1 U 1 U 1 U 1 U 1 U 1 U 1 U 5.1 0.59 J 2.6 1 U 1.4 1 U 0.41 J 5.1 J+12 90 84 12 J+17 10 UJ 20 16 92 86 16 18 10 UJ 161000 50000 72000 69000 168000 145000 187000 14200 1000 U 1000 U 1000 U 1000 U 1000 U 1000 U 239000 30200 76300 24200 120000 6900 5500 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 9100 5700 17200 22100 62500 54700 158000 9100 5700 17200 22100 62500 54700 158000 4200 4000 5900 6000 9400 8900 4200 48 36 20 U 20 U 20 UJ 20 U 12 J 650 J 2700 10200 9900 25400 23200 5700 100 U 100 U 100 U 100 U 100 U 100 U 100 U Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 6 of 8 Constituent Fractio CAS RN Criteria Min Groundwate Criteria Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 GWA-9S GWA-9S MW-12 MW-12 MW-12D MW-12D MW-20D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/19/2015 9/9/2015 6/20/2015 9/9/2015 6/20/2015 9/9/2015 6/24/2015 N N N N N N N GWA-9S DR-GWA-9S-NS-3Q15 MW-12 DR-MW-12-NS-3Q15 MW-12D DR-MW-12D-NS-3Q15 MW-20D 4.17 4.52 0.25 0.2 0.25 0.2 0.49 23.8 19 19.4 18.5 23.7 19.9 16.8 5.55 5.1 5.58 5.6 6.18 6.1 7.44 235.9 7.2 51.04 8.2 29.71 4.89 9.67 39.3 48.1 58.3 101.7 210.5 214.5 322 331.5 287 166.3 -48.2 64.5 -54.4 22 32.68 23.35 22.64 Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 7 of 8 Constituent Fractio CAS RN Criteria Min Groundwate Criteria Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solid N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Sol N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus N N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-20S OW-310D Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/24/2015 9/11/2015 N N MW-20S DR-OW-310D-NS-3Q15 100 U 100 U 100 U 800 0.5 U 0.28 J 0.5 U 0.25 J 0.58 777 0.63 782 12 380 13 410 0.2 U 0.2 U 0.2 U 0.12 J 50 U 980 50 U 980 0.08 U 0.08 U 0.08 U 0.08 U 15300 95200 0.24 J+0.21 J 0.22 J 0.95 J+ 2.2 1.4 2.1 1.9 1 U 1 U 1 U 1.7 J+ 2500 2200 2800 3500 0.1 U 0.1 U 0.1 U 0.71 10500 13500 840 1400 820 1600 0.2 U 0.2 U 0.2 U 0.2 U 79.2 816 0.22 J 45.9 0.18 J 43 0.92 2.2 0.87 2.6 J+ 5000 U 7810 0.5 U 0.5 U 0.5 U 0.5 U 9640 20000 120 2600 130 2600 0.1 U 0.091 J 0.1 U 0.14 J+ 1 U 1.6 1 U 3.2 2.8 J+12 60 3.4 J 121000 383000 690 J 1000 U 3000 6600 5000 U 5000 U 68300 283000 68300 283000 20800 19100 20 U 20 U 3800 26400 100 U 100 U Table 2-6 Groundwater Results Upgradient of Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 8 of 8 Constituent Fractio CAS RN Criteria Min Groundwate Criteria Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 MW-20S OW-310D Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/24/2015 9/11/2015 N N MW-20S DR-OW-310D-NS-3Q15 0.81 23.6 7.1 5.82 483.9 -133.3 Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 10 AB-10D AB-10D AB-25BR AB-25BR AB-25D AB-25D AB-30BR Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/24/2015 9/11/2015 6/26/2015 9/11/2015 6/26/2015 9/12/2015 6/24/2015 N N N N N N N AB-10D DR-AB-10D-NS-3Q15 AB-25BR DR-AB-25BR-NS-3Q15 AB-25D DR-AB-25D-NS-3Q15 AB-30BR Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L 74 J 100 U 100 U 100 U 52 J 100 U 100 U Aluminum T 7429-90-5 --NS µg/L 290 430 100 U 85 J 170 360 280 Antimony D 7440-36-0 --NS µg/L 8.8 1.5 1 0.86 1.6 0.5 U 0.5 U Antimony T 7440-36-0 --1 IMAC µg/L 1.9 1.4 1 0.45 J 1.7 0.2 J 0.5 U Arsenic D 7440-38-2 --NS µg/L 0.66 0.41 J 2.4 1.6 0.31 J 0.25 J 0.82 Arsenic T 7440-38-2 --10 02L µg/L 0.68 0.51 J+2.6 1 0.45 J 0.38 J 0.83 Barium D 7440-39-3 --NS µg/L 37 310 19 30 16 26 82 Barium T 7440-39-3 --700 02L µg/L 290 400 21 35 20 29 99 Beryllium D 7440-41-7 --NS µg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Beryllium T 7440-41-7 --4 IMAC µg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Boron D 7440-42-8 --NS µg/L 250 240 190 270 820 930 300 Boron T 7440-42-8 --700 02L µg/L 290 230 180 260 840 830 320 Cadmium D 7440-43-9 --NS µg/L 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U Cadmium T 7440-43-9 --2 02L µg/L 0.08 U 0.08 U 0.08 U 0.08 U 0.026 J 0.08 U 0.08 U Calcium T 7440-70-2 --NS µg/L 60800 J-88700 33200 40500 29300 35600 J-69700 Chromium D 7440-47-3 --NS µg/L 5.5 3.4 4.4 0.49 J 0.19 J+0.33 J+0.86 J+ Chromium T 7440-47-3 --10 02L µg/L 4.1 6.1 30.1 13.4 0.96 2.9 J+2.2 J+ Cobalt D 7440-48-4 --NS µg/L 0.96 1.1 0.5 U 0.5 U 0.25 J 0.34 J+0.5 U Cobalt T 7440-48-4 --1 IMAC µg/L 1.1 1.9 0.27 J 0.24 J 0.3 J 0.78 0.29 J Copper D 7440-50-8 --NS µg/L 1.5 J+5.3 0.41 J+0.48 J 0.28 J+1.3 J+1.2 J+ Copper T 7440-50-8 --1000 02L µg/L 2.1 J+1.9 1.6 2.5 J+0.36 J 0.77 J+2.5 J+ Iron D 7439-89-6 --NS µg/L 50 U 50 UJ 50 U 50 U 50 U 50 U 77 Iron T 7439-89-6 --300 02L µg/L 34 J 43 J 150 150 93 330 490 Lead D 7439-92-1 --NS µg/L 0.1 UJ 1 0.1 UJ 0.074 J 0.1 UJ 0.13 J+0.14 J+ Lead T 7439-92-1 --15 02L µg/L 0.13 1.2 0.086 J 0.49 0.17 0.52 J+0.28 Magnesium T 7439-95-4 --NS µg/L 10900 3060 6090 8390 10500 13400 10900 Manganese D 7439-96-5 --NS µg/L 5 U 5 U 4.1 J 52 190 510 350 Manganese T 7439-96-5 --50 02L µg/L 26 13 7.8 59 180 550 370 Mercury D 7439-97-6 --NS µg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U Mercury T 7439-97-6 --1 02L µg/L 0.2 U 0.2 UJ 0.2 U 0.2 UJ 0.2 U 0.2 U 0.2 U Methane N 74-82-8 --NS µg/L 31.5 J+38.6 J 8.6 J+6.6 J+4.2 J+3.5 J+34.5 J+ Molybdenum D 7439-98-7 --NS µg/L 2.4 2.1 7.4 5.5 12.6 11.4 2.3 Molybdenum T 7439-98-7 --NS µg/L 1.6 2.4 8.3 3.4 13 11.6 2.4 Nickel D 7440-02-0 --NS µg/L 1.8 J+1.7 1.2 J+1.7 2.3 3 J+1.4 J+ Nickel T 7440-02-0 --100 02L µg/L 1.6 J+2.3 15.1 7.3 2.9 4.8 J+2.5 J+ Potassium T 7440-09-7 --NS µg/L 68800 J-93800 5000 U 5000 U 5000 U 5000 U 5000 U Selenium D 7782-49-2 --NS µg/L 0.38 J 0.35 J 0.67 0.44 J 0.5 U 0.5 U 0.5 U Selenium T 7782-49-2 --20 02L µg/L 0.22 J 0.47 J 0.64 0.23 J 0.5 U 0.5 U 0.5 U Sodium T 7440-23-5 --NS µg/L 42000 58200 43700 35500 32300 24300 14200 Strontium D 7440-24-6 --NS µg/L 730 3400 380 530 160 160 680 Strontium T 7440-24-6 --NS µg/L 2900 3900 410 570 180 170 740 Thallium D 7440-28-0 --NS µg/L 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U Thallium T 7440-28-0 --0.2 IMAC µg/L 0.1 U 0.02 J 0.1 U 0.1 UJ 0.023 J 0.1 U 0.1 U Vanadium D 7440-62-2 --NS µg/L 2.9 0.96 J 5.1 3.2 0.56 J 0.45 J 1 U Vanadium T 7440-62-2 --0.3 IMAC µg/L 1.5 0.63 J 5.5 1.7 0.69 J 0.64 J 0.91 J Zinc D 7440-66-6 --NS µg/L 10 UJ 10 U 10 U 10 U 10 U 27 J+10 UJ Zinc T 7440-66-6 --1000 02L µg/L 10 UJ 7.2 J 10 U 2.8 J 3.6 J 38 12 J+ Total Dissolved Solids N TDS --500000 02L µg/L 272000 1320000 296000 289000 258000 247000 327000 Total Organic Carbon N TOC --NS µg/L 28400 1200 1200 960 J 1000 U 10700 1000 U Total Suspended Solids N TSS --NS µg/L 80400 2500 U 10100 5000 22400 12100 Alkalinity, CO3 N ALK-CO3 --NS µg/L 10000 5000 U 11500 5000 U 5000 U 5000 UJ 5000 U Alkalinity, HCO3 N ALK-HCO3 --NS µg/L 226000 698000 55900 66600 70800 1000 J+133000 Alkalinity, lab N ALK-LAB --NS µg/L 236000 698000 67400 66600 70800 1000 J+133000 Chloride N 16887-00-6 --250000 02L µg/L 24900 17400 22900 23600 19800 20400 20800 Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L 13 J+20 U 20 U 20 U 12 J 20 U 20 UJ Sulfate N 14808-79-8 --250000 02L µg/L 33700 19800 99000 99800 83000 84800 96700 Sulfide N 18496-25-8 --NS µg/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U As(III)T 7784-46-5 --NS µg/L 0.439 0.189 As(V)T 10103-60-3 --NS µg/L 0.143 0.325 Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L 4.51 0.039 J+ Fe(II)T 1345-25-1 --NS µg/L 20 U 20 U Fe(III)T 1309-37-1 --NS µg/L 20 UJ 20 U Mn(II)T 1344-43-0 --NS µg/L 5 UJ 213 Mn(IV)T 1313-13-9 --NS µg/L 13.1 5.76 Se(IV)T 10102-18-8 --NS µg/L 0.5 U 0.5 U Se(VI)T 13410-01-0 --NS µg/L 0.5 U 0.5 U Uranium, Natural T 7440-61-1 --NS µg/L 1.6 1.3 1.28 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 10 AB-10D AB-10D AB-25BR AB-25BR AB-25D AB-25D AB-30BR Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/24/2015 9/11/2015 6/26/2015 9/11/2015 6/26/2015 9/12/2015 6/24/2015 N N N N N N N AB-10D DR-AB-10D-NS-3Q15 AB-25BR DR-AB-25BR-NS-3Q15 AB-25D DR-AB-25D-NS-3Q15 AB-30BR Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L 1.02 5.47 0.499 J Radium-228 T 15262-20-1 --NS pCi/L 2.03 J 3 U 3 U Uranium-233 T 13968-55-3 --NS µg/L 0.05 U 0.05 U 0.05 U Uranium-234 T 13966-29-5 --NS µg/L 0.05 U 0.05 U 0.05 U Uranium-236 T 13982-70-2 --NS µg/L 0.05 U 0.05 U 0.05 U Dissolved Oxygen N DO --NS mg/l 0.2 0.27 0.67 0.51 0.74 Temp (Celcius)N TEMP --NS Deg C 22.9 23.1 24.4 22.7 23.7 pH (field)N PH 6.5 8.5 02L SU 12.2 9.12 8.47 7.09 7.1 Turbidity, field N TURB --NS NTU 9.4 3.31 5.13 6.11 16.71 Spec. Cond. (field)N SC --NS µS/cm 5588 427 440.7 390 374.2 Oxidation Reduction Potential N ORP --NS mV -197.8 155 5.1 208 127.9 GW Depth (TOC)N GW_DEPTH-TOC --NS ft 59.23 52.44 Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 3 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AB-30BR AB-30D AB-30D AB-30S AB-30S AB-35BR AB-35BR Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/10/2015 6/24/2015 9/11/2015 6/29/2015 9/10/2015 6/25/2015 9/10/2015 N N N N N N N DR-AB-30BR-NS-3Q15 AB-30D DR-AB-30D-NS-3Q15 AB-30S DR-AB-30S-NS-3Q15 AB-35BR DR-AB-35BR-NS-3Q15 100 U 100 U 100 U 110 100 U 100 U 100 U 270 94 J 250 130 J 3400 190 75 J 0.5 U 2 0.43 J 0.5 UJ 0.5 U 0.51 0.5 U 0.5 U 1.5 0.9 2.6 J 0.5 U 0.48 J 0.5 U 0.78 0.46 J 0.35 J 0.5 UJ 0.5 U 12 9.3 0.94 0.41 J 0.41 J+0.5 U 0.96 11.7 10.5 J 110 82 91 120 110 210 370 100 110 95 130 160 240 360 0.2 U 0.2 U 0.2 U 0.2 UJ 0.44 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.45 0.84 0.2 U 0.2 U 310 240 290 300 320 270 220 300 250 270 290 310 270 240 0.08 U 0.08 U 0.08 U 0.08 UJ 0.064 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.086 0.075 J 0.08 U 0.08 U 70400 52300 57200 8580 5720 84300 79000 0.21 J 2 J+0.75 0.78 J+0.2 J 1.5 J+0.55 1.7 2.7 3.3 0.99 J+10.4 3.8 2.3 J 0.5 U 0.18 J 0.27 J 0.5 UJ 24.9 0.24 J 0.5 U 0.23 J 0.3 J 0.44 J 29 30.7 0.26 J 0.14 J 1 U 4.5 J+0.57 J 2.2 J+0.98 J 1.7 J+1 U 0.91 J 0.71 J+1.9 0.97 J+7.9 3.3 J+0.86 J 94 50 U 50 J 39 J 33 J 50 U 50 U 460 97 380 110 J 4200 150 93 J 0.1 U 0.051 J+0.1 0.1 UJ 0.39 0.062 J+0.1 U 0.18 0.14 0.29 0.44 J+5.1 0.16 0.12 11900 7830 9230 5360 4040 14700 13000 400 280 380 1600 1400 390 150 380 430 360 1500 1100 410 220 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.15 J 0.2 U 0.2 UJ 0.2 U 0.12 J 0.2 U 0.2 U 40 23.5 J+20.5 15.8 J+16.5 J+20.2 J+22.3 J 2.9 2.8 1.3 0.5 U 0.5 U 20 21.3 3.2 2.5 1.9 0.5 U 0.29 J 21.4 19.9 J 0.85 1.5 J+1.7 0.38 J+7.8 1.1 J+0.77 1.8 1.9 J+2.7 8.6 J+11.7 1.1 J+1.4 J 5000 U 5000 U 5000 U 5000 U 5000 U 13500 14200 0.5 U 0.28 J 0.5 U 0.5 U 0.5 U 0.32 J 0.5 U 0.5 U 0.5 U 0.31 J 0.5 U 0.24 J 0.67 0.5 U 15900 13800 15400 29400 29600 34400 158000 870 340 420 150 150 550 730 770 400 450 150 110 650 690 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.02 J 0.093 J 0.1 U 0.1 U 1 U 0.96 J 0.57 J 1 UJ 1 U 0.99 J 1.5 0.67 J 0.86 J 1.1 1 U 18.3 1.8 1.8 J 10 U 3 J+21 15 J+58 4.4 J 10 U 20 4 J+43 13 J+32 9.6 J+3.7 J 377000 249000 304000 183000 174000 410000 905000 J 21000 1000 U 1000 U 650 J 760 J 12900 198000 J 14300 2500 U 37600 2500 U 69400 13300 68000 J 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 133000 90900 87800 6200 3600 J 187000 197000 133000 90900 J-87800 6200 3600 J 187000 197000 18000 22100 21900 10200 10400 18800 33600 J 20 U 13 J+20 U 20 UJ 20 U 17 J+20 U 106000 71500 79400 81500 74200 129000 195000 J 100 U 100 U 100 U 100 U 100 U 100 U 6500 J- 0.158 0.2 U 9.84 J 0.12 0.2 U 0.66 1.38 0.026 J+0.871 J 10.1 13.9 7.3 J+ 20 U 20 U 20 UJ 292 1540 406 J+ 85.2 2.5 UJ 16.9 J+ 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 UJ Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 4 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/l Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 AB-30BR AB-30D AB-30D AB-30S AB-30S AB-35BR AB-35BR Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/10/2015 6/24/2015 9/11/2015 6/29/2015 9/10/2015 6/25/2015 9/10/2015 N N N N N N N DR-AB-30BR-NS-3Q15 AB-30D DR-AB-30D-NS-3Q15 AB-30S DR-AB-30S-NS-3Q15 AB-35BR DR-AB-35BR-NS-3Q15 0.2 0.6 2.83 0.2 0.84 0.02 26.8 23 21.9 25.3 28.9 32 7.3 7.4 4.92 4.9 7.57 7.8 9.4 9.7 7.9 8.2 6.27 7.77 555 443.9 264.6 255 618 585 -90.6 -90.1 281.7 293.3 124.7 -214.9 Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 5 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AB-5D AB-5D MW-10 MW-10 MW-10D MW-10D MW-11 Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/18/2015 9/9/2015 6/25/2015 9/11/2015 6/24/2015 9/11/2015 6/29/2015 N N N N N N N AB-5D DR-AB-5D-NS-3Q15 MW-10 DR-MW-10-NS-3Q15 MW-10D DR-MW-10D-NS-3Q15 MW-11 100 U 100 U 100 U 100 U 100 U 100 U 62 J 180 100 U 100 U 100 U 160 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 8.8 14.1 0.5 U 0.5 U 0.5 U 0.5 U 8.5 13.9 0.5 U 0.5 U 0.5 U 0.14 J 89 64 29 40 45 63 89 67 32 45 46 72 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.42 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 560 630 460 440 460 240 500 650 460 460 440 230 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.034 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.038 J 34900 J-40100 41000 33600 33200 2850 0.2 J+0.5 U 3.6 0.28 J+0.5 U 0.36 J+ 3.3 1.2 6.6 0.27 J 0.34 J 1.2 J+ 1.1 5.4 0.19 J 0.59 0.59 28.5 1 5.5 0.28 J 0.57 0.57 29.2 0.25 J 0.24 J 1 U 1 U 12 0.54 J+ 0.51 J 0.51 J 1 U 0.43 J 0.45 J+2 J+ 63 1100 50 U 130 120 50 U 140 1400 50 U 170 150 400 0.1 U 0.08 J 0.1 U 0.1 U 0.88 0.09 J+ 0.058 J 0.12 0.1 U 0.048 J 0.063 J 1.2 J+ 7180 7270 13600 11000 11000 1810 1000 1300 5 U 990 950 890 1000 1300 13 1000 930 880 0.1 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 0.2 U 0.2 UJ 0.2 U 19.1 J+83.8 1.5 J+1.5 J+13 10 UJ 1.6 J+ 3.6 4.4 0.5 U 0.13 J 0.15 J 0.5 U 3.5 4.4 0.5 U 0.13 J 0.13 J 0.5 U 3 J+7 1.4 2.1 1.9 5.5 J+ 4.2 7.8 2 2.1 1.7 J+5.6 J+ 13900 13300 5000 U 5000 U 5000 U 5000 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 28400 32800 15800 17300 18200 19800 390 470 690 270 300 54 380 460 720 300 300 59 0.018 J+0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.024 J 0.1 U 0.1 U 0.1 U 0.1 UJ 0.023 J 1 U 1 U 1 U 1 U 1 U 0.46 J 0.77 J 1 U 1 U 1 U 1 U 2.6 3.8 J 10 U 10 U 10 UJ 10 U 5.7 J+ 5.6 J+3.7 J 10 U 10 U 10 U 6.8 J+ 247000 253000 233000 297000 214000 213000 118000 1000 U 590 J 1200 1400 510 J 30100 1400 5000 7400 5000 U 2500 U 3300 38300 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 131000 129000 124000 135000 95300 89200 5000 U 131000 129000 124000 135000 95300 89200 5000 U 15500 14200 20400 22700 24100 23200 6500 20 U 20 U 1500 640 J-11 J 20 UJ 110 J+ 45200 55700 26800 28800 41300 42200 48100 100 U 100 U 100 U 100 U 100 U 100 U 100 U 0.197 J Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 6 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/l Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 AB-5D AB-5D MW-10 MW-10 MW-10D MW-10D MW-11 Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/18/2015 9/9/2015 6/25/2015 9/11/2015 6/24/2015 9/11/2015 6/29/2015 N N N N N N N AB-5D DR-AB-5D-NS-3Q15 MW-10 DR-MW-10-NS-3Q15 MW-10D DR-MW-10D-NS-3Q15 MW-11 1 UJ 3 U 0.05 U 0.05 U 0.05 U 0.2 5.4 1.74 0.62 3.61 24.8 20.8 20.4 19.1 24.5 6.3 6.21 6.2 6.22 4.77 8.5 5.4 1.2 1.1 5.53 431.1 340 330 336 160.5 -33.1 119 163 80 398 13.28 18.3 50 Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 7 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-11 MW-11D MW-308BR MW-308BR MW-310BR MW-310BR MW-311BR Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 9/11/2015 6/29/2015 6/15/2015 9/9/2015 6/16/2015 9/9/2015 6/29/2015 N N N N N N N DR-MW-11-NS-3Q15 MW-11D MW-308BR DR-MW-308BR-NS-3Q15 MW-310BR DR-MW-310BR-NS-3Q15 MW-311BR 100 U 100 U 9.7 J+100 U 5.7 J 100 U 100 U 790 740 483 120 659 580 910 0.5 U 0.5 U 0.22 J 0.5 U 0.32 J 1.4 0.22 J 0.5 U 0.5 U 0.24 J 0.39 J 0.34 J 0.99 0.3 J 0.5 U 0.18 J 1.7 0.67 1.1 2.7 0.35 J 0.5 U 0.25 J 1.8 0.79 1.3 2.5 0.32 J 71 54 69 69 56 33 94 81 54 76 69 57 46 110 0.46 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.46 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 290 91 260 J+440 31 J 49 J 700 280 87 260 360 35 J+40 J 690 0.046 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.046 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 3270 62500 169000 232000 34700 26100 53400 0.24 J 1.1 J+0.5 U 0.17 J 1.7 J+0.63 0.37 J+ 0.58 1.5 J+1.5 0.8 2.3 2.8 3.3 J+ 33.9 0.5 U 0.32 J 14.7 0.5 U 0.5 U 0.52 30.5 0.22 J 0.6 9.3 0.2 J 0.21 J 0.84 2.5 0.55 J+1 U 1 U 0.26 J+0.36 J 1 UJ 0.49 J+1.8 J+0.54 J+0.46 J 0.91 J+1.2 2.6 J+ 50 U 50 U 1190 7600 50 U 50 U 380 1300 850 1910 5300 377 410 1200 0.24 0.1 UJ 0.1 U 0.1 U 0.1 UJ 0.058 J 0.1 UJ 0.32 0.29 J+0.22 J+0.16 0.88 1.1 0.53 J+ 2090 8020 28000 42800 6510 3980 11200 930 100 2000 7700 120 8.2 570 910 130 2200 5400 110 37 580 0.2 U 0.2 U 0.2 U 0.2 U 0.092 J+0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 UJ 0.2 U 0.082 J+0.2 U 0.2 U 2.1 J+7.6 J+27 32.8 10 U 4.4 J+8.5 J+ 0.5 U 3.4 7.6 0.61 1.8 3.4 5 0.5 U 2.4 8.1 1.8 1.9 2.9 5 6 1.4 J+0.98 J+11.9 0.35 J+1.1 2.9 J+ 5.9 1.4 J+1.7 J+8.2 0.88 J+2.3 4 J+ 5000 U 3050 J 5000 U 5000 U 5000 U 5000 U 5910 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.39 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.21 J 0.41 J 0.5 U 21200 14000 20100 23300 21200 23600 23800 64 480 1200 2000 190 160 920 64 510 1300 1700 200 190 980 0.1 U 0.1 U 0.1 U 0.1 U 0.1 UJ 0.1 U 0.1 U 0.017 J+0.021 J 0.1 U 0.1 U 0.1 UJ 0.016 J 0.016 J 0.67 J 0.5 J+1 U 1 U 2.1 4.9 0.38 J+ 0.58 J 1 U 0.84 J 1 U 2.5 3.7 0.89 J 15 10 UJ 9.8 J+3.1 J 10 U 10 U 3.8 J+ 6.5 J 4.6 J+6.8 J+3 J 5.7 J 6.7 J 15 J+ 143000 304000 844000 1300000 183000 161000 318000 1500 1000 U 610 J 1000 U 800 J 840 J 27400 11400 9200 19700 16400 36700 41400 55300 5000 U 5000 U 10000 U 5000 U 10000 U 8800 5000 U 5000 U 124000 170000 140000 110000 73700 154000 5000 U 124000 170000 140000 110000 82500 154000 7600 23600 11600 13100 11600 12700 22000 100 J-65 J+20 U 11 J 20 U 20 U 14 J+ 48600 70000 323000 586000 14100 18700 53000 100 U 100 U 200 U 100 U 1000 U 100 U 100 U 0.391 Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 8 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/l Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 MW-11 MW-11D MW-308BR MW-308BR MW-310BR MW-310BR MW-311BR Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 9/11/2015 6/29/2015 6/15/2015 9/9/2015 6/16/2015 9/9/2015 6/29/2015 N N N N N N N DR-MW-11-NS-3Q15 MW-11D MW-308BR DR-MW-308BR-NS-3Q15 MW-310BR DR-MW-310BR-NS-3Q15 MW-311BR 2.02 3 U 0.05 U 0.05 U 0.05 U 0.06 2.24 0.49 0.2 0.28 0.9 0.77 19.8 22 31.4 22.3 32.8 25.2 24 3.11 7.78 7.05 6.6 8.16 8.8 7.05 26 5.26 5.45 6.2 9.92 9.1 39.18 147 454.4 1096 1628 283.9 241.3 505 185 132.5 -20.4 -89 121.6 75.8 -120.9 13.84 18.1 Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 9 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-311BR MW-314BR MW-314BR MW-9 MW-9D MW-9D Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/11/2015 6/25/2015 9/11/2015 6/30/2015 6/24/2015 9/11/2015 N N N N N N DR-MW-311BR-NS-3Q15 MW-314BR DR-MW-314BR-NS-3Q15 MW-9 MW-9D DR-MW-9D-NS-3Q15 100 U 100 U 100 U 100 U 100 U 100 U 560 350 120 250 2400 1300 0.5 U 0.53 1.3 0.5 U 0.5 U 0.5 U 0.5 U 0.47 J 1.6 0.5 U 0.5 U 0.27 J 0.18 J 0.36 J 1.7 0.14 J 0.5 U 0.5 U 0.5 U 0.3 J 1.8 J+0.27 J 0.21 J 0.12 J+ 94 19 20 64 4 J 3.5 J 110 24 25 70 19 22 0.2 U 0.2 U 0.2 U 0.11 J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.21 0.19 J 0.1 J 790 510 460 50 U 1000 1000 810 500 490 28 J 1000 1100 0.08 U 0.08 U 0.08 U 0.08 U 0.15 0.059 J 0.08 U 0.08 U 0.03 J 0.031 J 1.8 0.12 53900 47400 48600 11400 21100 20800 0.25 J 0.87 J+0.32 J 2.5 0.45 J+0.58 2.1 5 0.96 J+1.8 J+7.1 3.6 0.13 J 0.5 U 0.5 U 5.6 0.28 J 0.37 J 0.52 0.34 J 0.17 J 6.4 1.5 2.7 1.1 2.1 J+4.3 1 UJ 0.34 J 8.4 0.72 J 1.2 J+0.79 J+10.9 8.7 3.1 J+ 470 50 U 28 J 340 50 U 50 U 1100 380 160 990 2600 1400 0.25 0.1 U 0.77 0.1 U 0.1 U 0.92 0.38 0.21 0.15 1.4 1.6 0.78 11500 13400 12900 7310 9180 9190 510 15 70 1600 540 610 540 25 65 1000 600 1100 0.2 U 0.23 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.095 J 0.2 U 0.2 U 11.4 2.5 J+18.3 1.6 J+10 U 12.8 J+ 0.6 0.72 J+2.1 0.1 J 9.7 9.4 0.63 0.91 2 0.5 U 10.1 9.4 2.6 1.2 J+1.5 1.7 2.6 3.3 3.1 3.4 J+1.9 J+1.2 J+5.2 4.2 J+ 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 16900 11400 13200 14300 25400 26800 920 160 170 120 100 130 930 160 170 130 120 140 0.1 U 0.1 U 0.039 J 0.1 U 0.1 U 0.1 U 0.1 U 0.016 J 0.045 J+0.1 U 0.035 J 0.016 J+ 0.5 J 0.65 J 0.63 J 0.47 J 0.5 J 0.74 J 0.62 J 1.3 0.82 J 2.3 11.1 2.7 10 U 10 U 5.9 J 8.5 J 10 UJ 10 U 8.9 J 5.5 J+7.9 J 8.5 J 6.1 J 4.8 J 272000 261000 289000 113000 238000 213000 1000 U 1000 U 1000 U 1700 1000 U 1000 U 18500 12600 14500 2500 U 49000 264000 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 127000 56700 60000 35200 32400 29600 127000 56700 60000 35200 32400 29600 23000 30500 30500 13000 J-20000 19900 20 U 20 U 20 U 230 20 U 20 U 53800 95800 98200 36100 87300 91400 100 U 100 U 100 U 100 U 100 U 100 U Table 2-7 Groundwater Results Beneath Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 10 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/l Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 MW-311BR MW-314BR MW-314BR MW-9 MW-9D MW-9D Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/11/2015 6/25/2015 9/11/2015 6/30/2015 6/24/2015 9/11/2015 N N N N N N DR-MW-311BR-NS-3Q15 MW-314BR DR-MW-314BR-NS-3Q15 MW-9 MW-9D DR-MW-9D-NS-3Q15 0.25 0.99 0.38 1.68 0.52 0.21 18 26.7 21.6 21.7 20.8 22.8 6.9 7.39 7.64 6.73 6.57 6.44 20.6 7.63 8.35 84.09 66 48.29 807 414.9 306.2 219.4 324 228.9 -47.1 108.3 -129.3 179.9 145 110.8 45.1 Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 10 AS-10D AS-10D AS-12D AS-12S AS-12S AS-2D AS-2D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/8/2015 9/8/2015 6/9/2015 6/9/2015 9/8/2015 6/17/2015 9/3/2015 N N N N N N N AS-10D DR-AS-10D-NS-3Q15 DR_AS-12D_WG_20150609 AS-12S DR-AS-12S-NS-3Q15 AS-2D DR-AS-2D-NS-3Q15 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L 578 810 13.1 J+100 U 100 U 100 U Aluminum T 7429-90-5 --NS µg/L 730 920 554 J+100 U 760 650 Antimony D 7440-36-0 --NS µg/L 2.7 3.4 0.24 J 0.5 U 0.5 U 0.5 U Antimony T 7440-36-0 --1 IMAC µg/L 2.9 3.8 0.23 J 0.5 U 0.16 J 0.5 U Arsenic D 7440-38-2 --NS µg/L 8.5 7.6 0.48 J 0.23 J 0.24 J 0.17 J Arsenic T 7440-38-2 --10 02L µg/L 8.9 7.5 0.52 0.28 J 0.29 J 0.38 J Barium D 7440-39-3 --NS µg/L 30 16 33 31 120 170 Barium T 7440-39-3 --700 02L µg/L 32 19 37 29 130 190 Beryllium D 7440-41-7 --NS µg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Beryllium T 7440-41-7 --4 IMAC µg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.096 J 0.1 J Boron D 7440-42-8 --NS µg/L 50 U 26 J 1000 1300 150 360 Boron T 7440-42-8 --700 02L µg/L 29 J 31 J 1000 1200 160 410 Cadmium D 7440-43-9 --NS µg/L 0.08 U 0.08 U 0.2 0.036 J 0.08 U 0.08 U Cadmium T 7440-43-9 --2 02L µg/L 0.08 U 0.08 U 0.19 0.04 J 0.041 J 0.08 U Calcium T 7440-70-2 --NS µg/L 65000 49900 40700 45900 72500 96600 Chromium D 7440-47-3 --NS µg/L 2 J 2.2 0.22 J+0.49 J 0.58 0.73 Chromium T 7440-47-3 --10 02L µg/L 2.4 2.9 1.1 J+1.1 J+1.4 2.3 Cobalt D 7440-48-4 --NS µg/L 0.5 U 0.5 U 2 1.2 1.6 0.81 Cobalt T 7440-48-4 --1 IMAC µg/L 0.5 U 0.5 U 2.2 1.3 2.1 1.2 Copper D 7440-50-8 --NS µg/L 0.76 J+3.6 0.4 J+6.8 0.76 J+0.46 J Copper T 7440-50-8 --1000 02L µg/L 1.2 J+2.1 1.1 J+0.46 J 1 UJ 1.1 Iron D 7439-89-6 --NS µg/L 50 U 50 U 82.6 370 1800 1800 Iron T 7439-89-6 --300 02L µg/L 35.6 J 69 928 450 2900 2800 Lead D 7439-92-1 --NS µg/L 0.077 J 0.69 0.1 U 0.51 0.1 U 0.17 Lead T 7439-92-1 --15 02L µg/L 0.1 U 0.095 J 0.5 J+0.11 0.54 0.48 Magnesium T 7439-95-4 --NS µg/L 59.2 J 100 U 30600 35700 16700 27400 Manganese D 7439-96-5 --NS µg/L 5 U 5 U 420 330 1500 1900 Manganese T 7439-96-5 --50 02L µg/L 5 U 3.4 J 430 320 1500 2100 Mercury D 7439-97-6 --NS µg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U Mercury T 7439-97-6 --1 02L µg/L 0.2 U 0.2 U 0.12 J 0.2 U 0.085 J+0.2 U Methane N 74-82-8 --NS µg/L 10 U 14.4 J+10 U 9.4 J+10 U 5.8 J+ Molybdenum D 7439-98-7 --NS µg/L 3.8 4.5 2.8 0.59 1 0.84 Molybdenum T 7439-98-7 --NS µg/L 3.9 4.7 2.5 0.64 1 0.86 Nickel D 7440-02-0 --NS µg/L 0.5 U 0.4 J 9.6 5.7 1.8 J+1.6 Nickel T 7440-02-0 --100 02L µg/L 0.23 J 0.92 9.8 5.4 2.8 J+2.4 Potassium T 7440-09-7 --NS µg/L 5000 U 4210 J 5000 U 5000 U 3120 J 5000 U Selenium D 7782-49-2 --NS µg/L 28.8 31.3 0.5 U 0.5 U 0.5 U 0.5 U Selenium T 7782-49-2 --20 02L µg/L 35.3 31 0.5 U 0.5 U 0.5 U 0.5 U Sodium T 7440-23-5 --NS µg/L 9700 11800 29000 33600 29700 26600 Strontium D 7440-24-6 --NS µg/L 320 300 600 700 510 630 Strontium T 7440-24-6 --NS µg/L 350 350 600 660 530 700 Thallium D 7440-28-0 --NS µg/L 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U Thallium T 7440-28-0 --0.2 IMAC µg/L 0.1 U 0.1 U 0.1 U 0.1 U 0.061 J 0.023 J+ Vanadium D 7440-62-2 --NS µg/L 13.3 30.6 0.29 J 0.32 J 0.32 J 1 U Vanadium T 7440-62-2 --0.3 IMAC µg/L 15.3 30.6 1.1 0.52 J 1.6 1.4 Zinc D 7440-66-6 --NS µg/L 10 U 3.3 J 10 U 27 8.4 J 2.7 J Zinc T 7440-66-6 --1000 02L µg/L 5.4 J+6.3 J 4.2 J+43 16 J+4.8 J Total Dissolved Solids N TDS --500000 02L µg/L 220000 J-202000 350000 321000 405000 498000 Total Organic Carbon N TOC --NS µg/L 1000 U 1600 1600 1500 1500 1200 Total Suspended Solids N TSS --NS µg/L 1100 5000 U 89000 2500 U 189000 133000 Alkalinity, CO3 N ALK-CO3 --NS µg/L 63000 54900 10000 U 5000 U 10000 U 5000 U Alkalinity, HCO3 N ALK-HCO3 --NS µg/L 23000 5000 U 190000 192000 170000 224000 Alkalinity, lab N ALK-LAB --NS µg/L 100000 77200 190000 192000 170000 224000 Chloride N 16887-00-6 --250000 02L µg/L 20300 19700 18700 21400 16900 17100 Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L 20 U 20 U 32 20 U 20 U 20 U Sulfate N 14808-79-8 --250000 02L µg/L 43900 43800 71700 83100 J-90600 135000 Sulfide N 18496-25-8 --NS µg/L 100 U 100 U 200 U 100 U 100 U 100 U As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 10 AS-10D AS-10D AS-12D AS-12S AS-12S AS-2D AS-2D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/8/2015 9/8/2015 6/9/2015 6/9/2015 9/8/2015 6/17/2015 9/3/2015 N N N N N N N AS-10D DR-AS-10D-NS-3Q15 DR_AS-12D_WG_20150609 AS-12S DR-AS-12S-NS-3Q15 AS-2D DR-AS-2D-NS-3Q15 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS ug/l Uranium-234 T 13966-29-5 --NS ug/l Uranium-236 T 13982-70-2 --NS ug/l Dissolved Oxygen N DO --NS mg/L 2.38 2.2 1.29 0.25 0.12 Temp (Celcius)N TEMP --NS Deg C 27.5 24.9 30.1 24.2 24.4 pH (field)N PH 6.5 8.5 02L SU 10.67 10.7 5.95 6.1 6.32 Turbidity, field N TURB --NS NTU 3.58 4.3 9.26 1.47 6.12 Spec. Cond. (field)N SC --NS µS/cm 582 388.5 606 643 553 Oxidation Reduction Potential N ORP --NS mV 104 -21.7 222.2 167.6 -180.9 GW Depth (TOC)N GW_DEPTH-TOC --NS ft 26.42 18.43 Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 3 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AS-4D AS-4D AS-4D AS-6D AS-6D AS-8BR AS-8BR Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/5/2015 6/26/2015 9/3/2015 6/8/2015 9/8/2015 6/9/2015 9/8/2015 N N N N N N N AS-4D AS-4D DR-AS-4D-NS-3Q15 AS-6D DR-AS-6D-NS-3Q15 AS-8BR DR-AS-8BR-NS-3Q15 5.1 J 98 J 7.8 J 100 U 13.3 J+100 U 2990 100 J 206 110 331 J+100 U 0.5 U 0.5 U 0.16 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.24 J 0.5 U 0.21 J 0.5 U 1.5 1.5 1.5 0.86 0.16 J 0.5 U 1.8 1.6 2 0.88 0.34 J 0.12 J 86 88 43 42 78 77 97 100 45 49 95 86 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.18 J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 730 800 33 J 50 U 33 J 50 U 810 930 37 J 25 J 45 J 50 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 72800 88700 16300 18000 84600 66600 0.2 J+0.19 J+0.24 J 0.32 J 1.4 J+0.3 J 3.3 0.91 J+0.47 J 1.9 J+4.4 0.5 UJ 2.4 2.7 1.1 0.59 0.5 U 0.5 U 4 2.9 1.1 0.7 0.15 J 0.5 U 1 UJ 1 UJ 1 U 0.78 J 1 U 1 U 3.6 J+1 U 0.54 J+0.84 J+0.88 J 0.25 J+ 158 170 2880 3100 206 150 4480 250 J+3920 3400 466 170 J+ 0.089 J 0.059 J+0.1 U 0.14 0.048 J+0.1 U 1.7 0.28 J 0.087 J 0.24 J+0.19 J+0.1 U 37500 44600 20300 26300 10800 11600 700 770 260 220 790 920 770 870 270 250 910 950 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 0.2 U 0.2 U 41 22.7 J 68 106 20 15.6 J+ 6.8 7.6 0.64 0.15 J 1.4 J+0.13 J 7.2 7.8 0.35 J 0.2 J 1.8 0.14 J 2.1 2.5 J+1.5 J 0.88 0.85 J+0.34 J 5.2 J+3 1.5 1.3 J+1.2 J+0.33 J+ 2600 J 2770 J 5000 U 5000 U 4810 J 5000 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 22300 26100 20400 22800 14000 13000 920 970 150 150 400 380 980 1100 160 180 440 440 0.1 U 0.1 U 0.1 U 0.1 U 0.034 J 0.1 U 0.034 J 0.022 J+0.1 U 0.1 U 0.1 U 0.1 U 1 U 1 U 1 U 1 U 1.4 1 U 4.8 1 U 0.69 J+0.4 J 2.7 1 U 7.5 J 10 UJ 7.3 J 12 10 U 10 U 2.6 J+10 U 12 J+18 4.5 J+10 U 410000 J-432000 220000 J-237000 370000 314000 1200 1200 640 J 2000 U 1000 U 1000 U 90000 47400 5500 12900 38000 2500 U 10000 U 5000 U 10000 U 5000 U 10000 U 5000 U 310000 336000 J 140000 152000 150000 158000 310000 336000 J 140000 152000 150000 158000 J+ 21900 22400 16300 16500 8200 4800 20 U 20 U 20 U 20 U 20 U 20 U 44900 49400 15100 15600 74500 59700 500 U 100 U 100 U 100 U 100 U 100 U 1.41 0.2 U 0.007 J+ 148 20 U 951 1 UJ 0.5 U 0.5 U Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 4 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS ug/l Uranium-234 T 13966-29-5 --NS ug/l Uranium-236 T 13982-70-2 --NS ug/l Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 AS-4D AS-4D AS-4D AS-6D AS-6D AS-8BR AS-8BR Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/5/2015 6/26/2015 9/3/2015 6/8/2015 9/8/2015 6/9/2015 9/8/2015 N N N N N N N AS-4D AS-4D DR-AS-4D-NS-3Q15 AS-6D DR-AS-6D-NS-3Q15 AS-8BR DR-AS-8BR-NS-3Q15 0.36 0.43 0.41 1.46 0.31 25.2 27.8 24.8 24.6 19.8 6.24 6.02 6 7.09 7.07 7.49 9.3 8.32 51.38 0.88 744 380.8 420.6 496.5 458 169.5 113.2 29.9 20 -59.4 36.5 37.97 Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 5 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AS-8D AS-8D AS-8D MW-301BR MW-301BR MW-303BR MW-303BR Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling) 6/2/2015 6/26/2015 9/9/2015 6/11/2015 9/4/2015 6/12/2015 6/22/2015 N N N N N N N AS-8D AS-8D DR-AS-8D-NS-3Q15 MW-301BR DR-MW-301BR-NS-3Q15 MW-303BR MW-303BR 7 J 100 U 5.9 J 100 U 4.7 J 1530 62 J 202 230 J+938 1 UJ 0.5 U 0.5 U 0.5 U 0.16 J 1 UJ 0.5 U 0.16 J 0.5 U 0.25 J 1.2 J 0.41 J 0.84 0.64 6.4 1.24 J 0.38 J 0.9 0.58 8.6 64 69 33 21 69 82 71 35 26 94 1 UJ 0.2 U 0.2 U 0.2 U 0.2 U 1 UJ 0.2 U 0.2 U 0.2 U 0.2 UJ 50 UJ 50 U 50 U 50 U 50 U 50 UJ 50 U 50 U 50 U 29 J+ 1 UJ 0.08 U 0.08 U 0.08 U 0.08 U 1 UJ 0.08 UJ 0.08 U 0.08 U 0.08 U 47000 46700 43100 30200 34700 1 UJ 0.54 4.4 0.32 J 0.27 J 1.9 J 0.25 J+1.2 J+1 J+6.4 1 UJ 0.5 U 0.19 J 0.16 J 0.18 J 1 UJ 0.5 U 0.26 J 0.24 J+0.95 1 UJ 1 U 1 U 1.4 1 U 1 UJ 1 UJ 0.4 J 0.4 J 3.2 J+ 1160 700 146 330 2260 2900 890 383 J+690 J+2760 1 UJ 0.1 U 0.1 U 0.13 0.1 U 1 UJ 0.1 UJ 0.14 J+0.18 1.2 11300 12300 8200 7900 9480 1100 1000 400 410 510 1140 1000 410 400 J+500 0.05 U 0.2 U 0.2 U 0.2 U 0.2 U 0.05 U 0.2 U 0.2 U 0.2 U 0.2 U 10 U 24.5 J+10 U 5.1 J+10.2 J+ 1 UJ 0.13 J 1.2 0.71 1.5 1 UJ 0.16 J 1.3 0.69 2.1 1 UJ 0.33 J 2.4 J+0.38 J 0.51 J+ 1.59 J 0.28 J+0.93 J+0.68 4.8 J+ 1810 5000 U 5000 U 5000 U 3420 J 1 UJ 0.5 U 0.32 J 0.5 U 0.5 U 1 UJ 0.5 U 0.39 J 0.5 U 0.33 J 15700 14500 10600 9730 17400 320 310 370 280 170 330 320 380 290 190 0.2 UJ 0.1 U 0.1 U 0.1 U 0.017 J 0.2 UJ 0.1 U 0.035 J 0.02 J 0.056 J 0.3 UJ 1 U 1.5 0.4 J 0.39 J 1.88 J 1 U 1.8 0.81 J 3.7 12 J 10 U 10 U 13 J+8.4 J 7 J 10 UJ 3.7 J 3 J 16 250000 236000 210000 215000 J+272000 523 610 J 540 J 1000 U 760 J 38000 5000 U 9100 18200 13000 J 10000 U 5000 U 10000 U 5000 U 10000 U 170000 160000 150000 108000 140000 170000 160000 150000 108000 140000 6800 6600 4400 4200 8300 10 UJ 20 U 20 U 20 U 20 U 25000 20600 3300 2400 14900 100 U 100 U 100 U 100 U 100 U 0.593 0.2 U 0.008 J+ 974 28300 1210 6.46 0.5 U 0.5 U Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 6 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS ug/l Uranium-234 T 13966-29-5 --NS ug/l Uranium-236 T 13982-70-2 --NS ug/l Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 AS-8D AS-8D AS-8D MW-301BR MW-301BR MW-303BR MW-303BR Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling) 6/2/2015 6/26/2015 9/9/2015 6/11/2015 9/4/2015 6/12/2015 6/22/2015 N N N N N N N AS-8D AS-8D DR-AS-8D-NS-3Q15 MW-301BR DR-MW-301BR-NS-3Q15 MW-303BR MW-303BR 0.35 0.26 0.51 0.27 24.1 22.3 32.4 32.7 6.83 6.62 6.9 6.56 38.05 7.1 9.78 9.25 411.6 371 337.6 282.8 38.5 -35.7 44 26.2 38.65 Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 7 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-303BR MW-306BR MW-306BR MW-306BR MW-315BR MW-315BR Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/4/2015 6/12/2015 6/22/2015 9/4/2015 6/19/2015 9/8/2015 N N N N N N DR-MW-303BR-NS-3Q15 MW-306BR MW-306BR DR-MW-306BR-NS-3Q15 MW-315BR DR-MW-315BR-NS-3Q15 100 U 7.9 J 100 U 100 U 100 U 660 J+96.2 J-600 790 100 U 0.36 J 0.43 J 0.5 U 0.29 J+0.5 U 0.95 0.38 J 0.2 J 0.21 J 0.5 U 2.5 1.1 0.9 0.16 J 0.18 J 4.5 1 1 0.19 J 0.33 J 71 150 140 58 59 94 150 160 71 22 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.095 J 0.2 U 0.2 U 0.2 U 0.16 J 50 U 940 1500 50 U 50 U 50 U 920 1700 50 U 50 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.029 J 38600 91500 143000 40200 48400 0.28 J 0.31 J 0.29 J 0.32 J+0.19 J 7.2 1.4 J+3.2 J+24.8 6 0.13 J 0.45 J 1.2 1.2 J+0.48 J 0.46 J+0.5 U 1.4 2.2 2.6 5.5 1 U 0.8 J+1 U 1 U 28.3 1 U 1.4 J+2.4 5.2 J+ 2200 582 3100 86 39 J 3400 J+623 J 4000 1300 27 J 0.28 0.1 U 0.065 J 0.1 U 0.11 0.68 0.095 J 0.43 0.81 1.9 12200 26600 57900 22600 14900 530 930 2200 1500 1100 590 J+920 2400 1800 2.6 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 0.2 U 0.2 U 13.4 J+20.4 J+10 UJ 10.9 J+4.6 J+ 2.1 2.3 4.5 0.36 J+0.21 J 2.6 1.9 4.3 0.94 0.28 J 3 2 J+3.5 1.2 J+0.78 5 2.2 J+4.1 16.1 5.3 3740 J 4290 J 2970 J 5000 U 5000 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.2 J 0.5 U 0.22 J 0.5 U 0.5 U 19200 24200 32900 22100 15000 180 730 1200 420 460 210 740 1400 460 63 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.018 J 0.1 U 0.018 J 0.024 J 0.028 J 0.28 J 1.5 1 U 1 U 1 U 2 1.6 1.6 1.4 5.5 9 J+2.5 J 19 J+130 2.8 J 16 5 J 38 13 4.5 J 260000 J+530000 778000 J+277000 228000 580 J 900 J 530 J 810 J 1000 U 31200 6300 J 14100 222000 63600 5000 U 10000 U 5000 U 5000 U 5000 U 145000 160000 190000 176000 148000 145000 160000 190000 J-176000 148000 9700 21600 29700 10400 5600 20 U 20 U 20 UJ 20 U 20 UJ 16700 187000 345000 38400 39500 100 U 100 U 100 U 100 U 100 U Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 8 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS ug/l Uranium-234 T 13966-29-5 --NS ug/l Uranium-236 T 13982-70-2 --NS ug/l Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 MW-303BR MW-306BR MW-306BR MW-306BR MW-315BR MW-315BR Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/4/2015 6/12/2015 6/22/2015 9/4/2015 6/19/2015 9/8/2015 N N N N N N DR-MW-303BR-NS-3Q15 MW-306BR MW-306BR DR-MW-306BR-NS-3Q15 MW-315BR DR-MW-315BR-NS-3Q15 0.48 2.51 0.63 29.4 19.5 30 6.96 6.7 7.25 8.39 13.34 21.23 727 368 385.3 3.3 -24.9 23 Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 9 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-317BR MW-318D MW-318D OW-303D Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 2 (3Q-2015) 6/5/2015 6/2/2015 9/9/2015 9/12/2015 N N N N MW-317BR MW-318D DR-MW-318D-NS-3Q15 DR-OW-303D-NS-3Q15 520 21 J 100 U 100 U 649 510 120 7400 1 1 UJ 0.5 U 2 2.1 1 UJ 0.5 U 2.9 0.63 1 UJ 1 40.2 0.71 1 UJ 0.93 55 46 35 J 34 210 58 41 J 37 320 0.2 U 1 UJ 0.31 0.11 J 0.2 U 1 UJ 0.31 2.1 50 U 1250 1300 1200 44 J 1310 1300 1000 0.08 U 1 UJ 0.068 J 0.44 0.08 U 1 UJ 0.068 J 0.65 107000 21100 24900 52800 J- 8.4 1 UJ 0.38 J 0.27 J+ 11 2.8 J 0.69 J+15.1 0.5 U 12.9 J 6.6 47.8 0.5 U 13 J 6.7 53.2 4.8 J+1.38 J 2 J 1.4 J+ 1.6 J+9.7 J 0.56 J 37.6 J+ 50 U 588 490 9200 128 1150 720 14900 0.77 1 UJ 0.36 0.049 J+ 0.15 1 UJ 0.38 12.1 670 12700 15400 26100 10 U 607 390 5000 8.7 577 430 4500 0.2 U 0.05 U 0.2 U 0.2 UJ 0.2 U 0.05 U 0.2 U 0.2 U 20 U 10 U 9.3 J+131 5.1 1 UJ 0.5 U 5.5 5.6 1 UJ 0.5 U 7.1 0.5 UJ 12.4 J 10.7 20.1 0.54 J+15.1 J 11.3 31.4 J+ 15600 1700 5000 U 9510 0.53 1 UJ 1.2 0.5 U 0.75 1.03 J 1 2.2 18700 35400 26500 35600 450 589 650 1800 570 604 650 1900 0.1 U 0.2 UJ 0.1 U 0.26 0.1 U 0.2 UJ 0.1 U 0.56 8.5 0.3 UJ 1 U 0.91 J 8.4 0.654 J 1 U 36.5 10 U 78 34 J 2700 10 UJ 71 25 3000 350000 J-270000 257000 377000 1100 738 1200 J+14900 14000 J-9000 6200 1320000 130000 10000 U 5000 U 145000 J+ 10000 U 83000 71000 98000 270000 83000 71000 243000 8000 9100 8800 29400 10 UJ 20 U 20 U 27 15500 91000 90500 42900 100 U 100 U 100 U 100 U Table 2-8 Groundwater Results Beneath Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 10 of 10 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS ug/l Uranium-234 T 13966-29-5 --NS ug/l Uranium-236 T 13982-70-2 --NS ug/l Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 MW-317BR MW-318D MW-318D OW-303D Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 2 (3Q-2015) 6/5/2015 6/2/2015 9/9/2015 9/12/2015 N N N N MW-317BR MW-318D DR-MW-318D-NS-3Q15 DR-OW-303D-NS-3Q15 1.38 1.5 0.22 21.1 21.1 26.9 11.44 5.51 5.23 3.12 10.63 6.08 1399 404 379.3 -29.3 241.9 194.5 Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 12 GWA-10D GWA-10D GWA-10D GWA-11D GWA-11D GWA-11S GWA-14D Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling) 6/4/2015 6/26/2015 9/8/2015 6/5/2015 9/3/2015 6/10/2015 6/30/2015 N N N N N N N GWA-10D GWA-10D DR-GWA-10D-NS-3Q15 GWA-11D DR-GWA-11D-NS-3Q15 GWA-11S GWA-14D Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L 9 100 U 3.3 J 100 U 6.5 J 100 U Aluminum T 7429-90-5 --NS µg/L 6940 1100 425 J+330 53 90 J Antimony D 7440-36-0 --NS µg/L 1 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Antimony T 7440-36-0 --1 IMAC µg/L 1 U 0.5 U 0.5 U 0.5 U 0.18 J 0.5 U Arsenic D 7440-38-2 --NS µg/L 1 U 0.5 U 0.2 J 0.28 J 0.14 J 0.36 J Arsenic T 7440-38-2 --10 02L µg/L 1 U 0.4 J 0.25 J 0.39 J 0.18 J 0.38 J Barium D 7440-39-3 --NS µg/L 55 32 60 55 24 75 Barium T 7440-39-3 --700 02L µg/L 136 65 64 63 25 78 Beryllium D 7440-41-7 --NS µg/L 1 U 0.13 J 0.2 U 0.2 U 0.2 U 0.2 U Beryllium T 7440-41-7 --4 IMAC µg/L 1 U 0.36 0.2 U 0.2 U 0.2 U 0.2 U Boron D 7440-42-8 --NS µg/L 172 300 50 U 50 U 100 250 Boron T 7440-42-8 --700 02L µg/L 298 310 50 U 50 U 110 260 Cadmium D 7440-43-9 --NS µg/L 1 U 0.033 J 0.08 U 0.08 U 0.039 J 0.08 U Cadmium T 7440-43-9 --2 02L µg/L 1 U 0.049 J 0.08 U 0.08 U 0.046 J 0.08 U Calcium T 7440-70-2 --NS µg/L 24200 19800 48000 55500 9730 66200 Chromium D 7440-47-3 --NS µg/L 1 U 2.2 0.28 J+2.3 J+7.7 0.28 J Chromium T 7440-47-3 --10 02L µg/L 9.93 23.3 1.1 J+22.2 15.6 0.27 J+ Cobalt D 7440-48-4 --NS µg/L 2.11 0.71 1.2 1.4 2.9 0.2 J Cobalt T 7440-48-4 --1 IMAC µg/L 3.45 1.1 1.4 1.7 3.3 0.23 J Copper D 7440-50-8 --NS µg/L 7.79 J+1.2 0.29 J+4 0.28 J 0.28 J+ Copper T 7440-50-8 --1000 02L µg/L 8.24 4.2 J+0.57 J+1.3 0.44 J 1 UJ Iron D 7439-89-6 --NS µg/L 146 64 1180 2200 134 50 U Iron T 7439-89-6 --300 02L µg/L 6040 1100 1700 3200 227 140 Lead D 7439-92-1 --NS µg/L 1.04 0.16 0.1 U 0.41 J+0.1 U 0.1 U Lead T 7439-92-1 --15 02L µg/L 9.42 2.3 0.26 0.24 0.11 0.1 U Magnesium T 7439-95-4 --NS µg/L 13100 13000 16600 20000 5140 7420 Manganese D 7439-96-5 --NS µg/L 453 160 730 890 1200 290 Manganese T 7439-96-5 --50 02L µg/L 509 130 810 980 1200 300 Mercury D 7439-97-6 --NS µg/L 0.05 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury T 7439-97-6 --1 02L µg/L 0.05 U 0.2 U 0.2 U 0.2 U 0.81 J+0.2 U Methane N 74-82-8 --NS µg/L 10 U 1.6 J+27 11.9 J+13 62 J+ Molybdenum D 7439-98-7 --NS µg/L 1 U 0.095 J 0.97 1.1 0.46 J 12.5 Molybdenum T 7439-98-7 --NS µg/L 1 U 0.53 0.87 1.6 0.7 J+13 Nickel D 7440-02-0 --NS µg/L 6.43 8.8 1.1 J+11.3 13.9 0.51 Nickel T 7440-02-0 --100 02L µg/L 11.1 19.3 1.7 J+20.5 17 0.46 J+ Potassium T 7440-09-7 --NS µg/L 3210 5000 U 5000 U 5000 U 5000 U 5000 U Selenium D 7782-49-2 --NS µg/L 1 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium T 7782-49-2 --20 02L µg/L 1 U 0.22 J 0.5 U 0.5 U 0.5 U 0.5 U Sodium T 7440-23-5 --NS µg/L 23400 17800 18100 19300 12500 21100 Strontium D 7440-24-6 --NS µg/L 381 360 440 450 240 1700 Strontium T 7440-24-6 --NS µg/L 481 430 480 500 240 1800 Thallium D 7440-28-0 --NS µg/L 0.2 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U Thallium T 7440-28-0 --0.2 IMAC µg/L 0.256 0.03 J 0.1 U 0.1 UJ 0.1 U 0.1 U Vanadium D 7440-62-2 --NS µg/L 0.324 0.29 J 1 U 1 U 0.34 J 0.5 J Vanadium T 7440-62-2 --0.3 IMAC µg/L 3.36 1.3 1.2 J+0.45 J 0.52 J 0.67 J Zinc D 7440-66-6 --NS µg/L 13 45 11 3.7 J+7.6 J 10 U Zinc T 7440-66-6 --1000 02L µg/L 43 J+110 43 J+6 J 2.7 J+4.1 J Total Dissolved Solids N TDS --500000 02L µg/L 220000 208000 240000 J-291000 10000 U 325000 Total Organic Carbon N TOC --NS µg/L 459 J+1100 930 J 1100 860 J 650 J Total Suspended Solids N TSS --NS µg/L 15000 14000 53000 3800 8600 6500 Alkalinity, CO3 N ALK-CO3 --NS µg/L 10000 U 5000 U 10000 U 5000 U 10000 U 5000 U Alkalinity, HCO3 N ALK-HCO3 --NS µg/L 39000 39800 180000 187000 57000 132000 Alkalinity, lab N ALK-LAB --NS µg/L 39000 39800 180000 187000 57000 132000 Chloride N 16887-00-6 --250000 02L µg/L 14000 11300 10900 10700 10000 13800 Nitrite as N N 14797-65-0 --1000 02L µg/L 232 Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L 290 20 U 20 U 75 20 UJ Sulfate N 14808-79-8 --250000 02L µg/L 3300 72400 37100 37200 4400 88500 Sulfide N 18496-25-8 --NS µg/L 4000 UJ 100 U 200 U 100 U 100 U 100 U As(III)T 7784-46-5 --NS µg/L 0.2 U As(V)T 10103-60-3 --NS µg/L 0.2 U Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L 0.105 Fe(II)T 1345-25-1 --NS µg/L 92 Fe(III)T 1309-37-1 --NS µg/L 20 U Mn(II)T 1344-43-0 --NS µg/L 296 Mn(IV)T 1313-13-9 --NS µg/L 1 UJ Se(IV)T 10102-18-8 --NS µg/L 0.091 Se(VI)T 13410-01-0 --NS µg/L 0.5 U Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 12 GWA-10D GWA-10D GWA-10D GWA-11D GWA-11D GWA-11S GWA-14D Round 1 (CSA Sampling)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 1 (CSA Sampling) 6/4/2015 6/26/2015 9/8/2015 6/5/2015 9/3/2015 6/10/2015 6/30/2015 N N N N N N N GWA-10D GWA-10D DR-GWA-10D-NS-3Q15 GWA-11D DR-GWA-11D-NS-3Q15 GWA-11S GWA-14D Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L 1.15 1.08 0.47 4.74 0.58 Temp (Celcius)N TEMP --NS Deg C 18.8 28.7 26.1 26.7 19 pH (field)N PH 6.5 8.5 02L SU 5.82 5.4 6.71 5.83 7.34 Turbidity, field N TURB --NS NTU 7.65 8.69 9.23 7.93 4.73 Spec. Cond. (field)N SC --NS µS/cm 319.5 303.3 429.8 165.1 807 Oxidation Reduction Potential N ORP --NS mV 140.8 208.3 26.3 246.9 -20.8 GW Depth (TOC)N GW_DEPTH-TOC --NS ft 33.79 Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 3 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-14D GWA-14S GWA-14S GWA-15D GWA-15D GWA-1D GWA-1D Round 2 (3Q-2015)Round 2 (3Q-2015)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/9/2015 9/9/2015 9/11/2015 6/30/2015 9/10/2015 6/11/2015 9/8/2015 N N N N N N N DR-GWA-14D-NS-3Q15 DR-GWA-14S-NS-3Q15 DR-GWA-14S-NS-3Q15 GWA-15D DR-GWA-15D-NS-3Q15 GWA-1D DR-GWA-1D-NS-3Q15 100 U 100 U 74 J 100 U 4 J 100 U 100 U 58 J 660 1000 413 60 J+ 0.5 U 0.5 U 0.17 J 0.5 U 0.24 J 1.1 0.5 U 0.5 U 0.5 U 0.5 U 0.31 J 1.3 0.45 J 1.2 0.14 J 0.31 J 1 1.3 0.45 J 1.2 0.18 J 0.32 J 1.2 1.4 76 58 61 52 51 68 5 U 47 67 59 62 79 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 0.084 J 0.2 U 0.2 U 260 49 J 79 73 50 U 50 U 50 U 28 J 86 80 50 U 50 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 71600 10600 140000 126000 54300 34000 0.32 J 0.34 J 0.38 J 0.19 J 0.73 0.23 J 0.66 J+13.6 1.2 J+1.8 1.6 J+0.31 J 0.18 J 7.3 0.14 J 0.5 U 0.5 U 0.5 U 0.32 J 3.5 0.24 J 0.61 0.3 J 0.5 U 0.64 J 1 U 11 0.67 J 1 U 1 U 0.25 J+0.69 J+0.76 J+1.8 1.1 J+1 UJ 85 4900 26 J 50 U 136 50 U 50 U 3200 840 980 719 69 J+ 0.11 0.1 U 0.1 U 0.12 0.1 U 0.1 U 0.14 0.1 0.33 J+1.3 0.29 J+0.1 U 7570 6040 18900 18400 5610 4210 330 7600 260 220 600 300 5 UJ 2300 270 220 680 300 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 0.2 U 0.087 J 0.2 U 0.2 U 338 8.6 J+3.9 J+5.2 J+10 U 10.4 J+ 13.3 2 0.93 1 2.6 3.9 12.9 0.58 0.89 0.78 2.7 4.5 0.56 2.9 0.91 0.67 0.62 J+0.5 U 0.63 J+10.9 1.1 J+1.8 1.1 J+0.2 J+ 5000 U 2990 J 5270 7580 6280 29700 0.5 U 0.5 U 0.22 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.24 J 0.5 U 0.5 U 0.5 U 21200 14200 26700 29800 10500 15500 1800 200 3300 3200 260 260 5 U 110 3300 2800 310 310 0.1 U 0.1 U 0.1 U 0.1 U 0.045 J 0.1 U 0.1 U 0.1 U 0.1 U 0.024 J 0.1 U 0.1 U 1 U 1 U 0.86 J 1.2 1 U 0.38 J 0.62 J 0.48 J 1.5 3.2 0.79 J 0.45 J 14 13 18 7.4 J 10 U 10 U 4.3 J 5.6 J 3.8 J 4.1 J 4.8 J 10 U 335000 218000 705000 618000 220000 198000 1000 U 1500 540 J 560 J 1000 U 690 J 46900 4900 42900 13400 33000 2500 U 5000 U 5000 U 5000 U 5000 U 10000 U 5000 U 130000 77900 129000 94500 160000 126000 130000 77900 129000 94500 160000 126000 13100 7500 13300 12700 1500 1700 20 U 20 U 20 UJ 21 20 U 20 U 90800 25700 307000 301000 4200 5400 100 U 100 U 100 U 100 U 100 U 100 U Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 4 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 GWA-14D GWA-14S GWA-14S GWA-15D GWA-15D GWA-1D GWA-1D Round 2 (3Q-2015)Round 2 (3Q-2015)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/9/2015 9/9/2015 9/11/2015 6/30/2015 9/10/2015 6/11/2015 9/8/2015 N N N N N N N DR-GWA-14D-NS-3Q15 DR-GWA-14S-NS-3Q15 DR-GWA-14S-NS-3Q15 GWA-15D DR-GWA-15D-NS-3Q15 GWA-1D DR-GWA-1D-NS-3Q15 0.18 1.75 0.71 0.3 0.54 0.3 29.9 26 20.6 21.2 19.7 18.7 7.1 5.9 7.09 6.8 7.5 9.1 3.17 2.92 4.52 8.9 18.83 8.2 508 173.7 1576 873 389.2 287.9 -45.5 61.4 156 84.8 -4.1 -78.8 6.32 9.8 23.34 33.05 Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 5 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-1S GWA-1S GWA-2D GWA-2D GWA-2S GWA-2S GWA-3D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/17/2015 9/9/2015 6/10/2015 9/8/2015 6/11/2015 9/4/2015 6/4/2015 N N N N N N N GWA-1S DR-GWA-1S-NS-3Q15 GWA-2D DR-GWA-2D-NS-3Q15 GWA-2S DR-GWA-2S-NS-3Q15 GWA-3D 100 U 100 U 5.8 J 100 U 3.4 J 100 U 9 920 110 90.9 310 806 1100 J+350 0.37 J 0.9 0.55 0.25 J 0.5 U 1 U 0.5 UJ 0.95 2.2 0.55 0.5 U 0.5 U 1 U 0.5 U 0.5 U 1.1 1.5 0.5 U 1 U 0.18 J 0.5 U 1.3 1.7 0.14 J 0.39 J 1 U 6.2 7.7 40 41 18 17 9 12 8.6 56 46 26 27 13 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1 U 0.094 J 0.2 U 0.2 U 0.2 U 0.078 J 0.13 J 1 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 1 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 1 U 3450 2320 58200 43200 2690 2940 10800 2.2 J+0.48 J 4.3 3.7 1.1 12.3 13.8 1.6 J+5.7 6.3 2.6 4.7 17.7 2.4 1.5 0.5 U 0.5 U 1.9 1 U 3 1.5 0.5 U 0.3 J 2.3 1.4 J+1.02 0.76 J+2.4 0.49 J 6.4 0.31 J+1.03 J+ 3 J+0.5 J 0.54 J 0.86 J+0.92 J 2.3 2.99 50 U 50 U 50 U 50 U 50 U 120 101 1200 170 86.7 230 909 1600 J+411 0.1 U 0.27 0.1 U 0.86 0.1 U 1 U 0.51 0.069 J 0.23 0.34 0.4 J+1.2 1.5 3470 1790 3860 6700 1290 1190 8090 100 71 5 U 280 88 81 107 120 74 25 280 94 46 J+122 0.2 UJ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.05 U 0.11 J+0.2 U 0.79 J+0.2 U 0.2 U 0.2 U 0.05 U 10 U 2.1 J+10 U 3.6 J+10 U 2.5 J+10 U 0.11 J 0.5 U 3.3 1.7 0.12 J 1.01 0.3 J 0.14 J 3.9 2.2 0.11 J 0.19 J 1.28 8.2 2.1 0.31 J 0.46 J 3.8 12.5 10.3 2.3 0.47 J 1.2 J+4.5 J+4.3 16.9 5000 U 5000 U 5560 5000 U 5000 U 5000 U 796 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1 U 18400 15000 11400 9490 3750 J 3390 J 24900 53 35 210 260 25 23 155 59 36 250 270 26 24 162 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.2 U 0.016 J 0.1 U 0.032 J 0.1 U 0.016 J 0.031 J 0.2 U 1 U 1 U 0.5 J 0.33 J 1 U 0.3 U 1.5 0.39 J 0.57 J 0.65 J 1.3 4.1 0.3 U 3.5 J 22 10 U 10 U 6.6 J 9.1 J+19 9.6 J+27 3.1 J+2.8 J 8.7 J 7 J 16 J+ 105000 56000 J 10000 U 198000 37000 96000 J+160000 1900 1100 780 J 520 J 9300 960 J 412 J+ 25000 2700 200000 97200 17000 58000 15000 10000 U 5000 U 18000 5000 U 10000 U 5000 U 10000 U 37000 18700 29000 128000 16000 13600 75000 37000 18700 51000 128000 16000 13600 75000 3600 J+4200 5000 4100 1800 1700 22000 57 20 U 37 34 20 UJ 160 J+190 15100 J+15100 3100 3700 640 J 1000 6200 200 U 100 U 100 U 100 U 100 U 100 U 500 U Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 6 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 GWA-1S GWA-1S GWA-2D GWA-2D GWA-2S GWA-2S GWA-3D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/17/2015 9/9/2015 6/10/2015 9/8/2015 6/11/2015 9/4/2015 6/4/2015 N N N N N N N GWA-1S DR-GWA-1S-NS-3Q15 GWA-2D DR-GWA-2D-NS-3Q15 GWA-2S DR-GWA-2S-NS-3Q15 GWA-3D 49.6 2.9 1 0.33 3.8 2.7 23.8 19.7 31.9 28.5 35.9 18.5 5.97 5.7 8.98 7.44 5.74 5.7 26.12 9.7 26.09 14.98 8.13 7.58 105 111.2 187.2 346.5 50.1 244.7 296.6 5.6 177 120.5 293.4 246.2 32.9 Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 7 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-3D GWA-3S GWA-3S GWA-4D GWA-4D GWA-4S GWA-4S Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/4/2015 6/4/2015 9/4/2015 6/23/2015 9/9/2015 6/19/2015 9/10/2015 N N N N N N N DR-GWA-3D-NS-3Q15 GWA-3S DR-GWA-3S-NS-3Q15 GWA-4D DR-GWA-4D-NS-3Q15 GWA-4S DR-GWA-4S-NS-3Q15 100 U 17 100 U 100 U 100 U 100 U 100 U 170 236 190 J+430 360 380 1700 0.5 J 1 U 0.5 U 0.23 J 0.5 U 0.5 U 0.5 U 0.66 1 U 0.5 U 0.49 J 0.5 U 0.5 U 0.5 U 0.5 U 1 U 0.5 U 0.39 J 0.2 J 0.18 J 0.23 J 0.16 J 1 U 0.11 J 0.37 J 0.5 U 0.2 J 0.39 J 6 45 38 20 26 27 39 9.3 49 34 26 31 32 60 0.2 U 1 U 0.2 0.1 J 0.2 U 0.2 U 0.2 U 0.069 J 1 U 0.1 J 0.2 U 0.2 U 0.2 U 0.16 J 27 J 50 U 50 U 240 250 200 J+250 26 J 50 U 50 U 250 250 190 250 0.062 J 1 U 0.037 J 0.032 J 0.08 U 0.08 U 0.08 U 0.08 1 U 0.039 J 0.08 U 0.08 U 0.08 U 0.08 U 11000 5830 2050 26500 20900 19500 19300 17.4 1 U 1.1 0.53 0.36 J 0.81 7 39.7 1 U 4.2 1.2 J+1.1 J+3.2 35.2 0.91 11.3 17.6 0.17 J 0.29 J 2.7 2.5 1.1 12.2 10.8 0.35 J 0.54 2.7 3.8 2.6 J+1 UJ 3.2 0.41 J 1 J 1 U 0.67 J 1.8 J+8.6 1.1 1.4 J+0.44 J 0.58 J 3.7 220 14 50 U 50 U 29 J 50 U 150 460 190 220 J+370 J+330 530 2400 0.27 1 U 0.28 0.1 U 0.12 0.1 U 0.067 J 0.8 1 U 0.2 0.45 J+0.53 0.29 1.7 9140 4990 1920 6890 7530 5970 5940 76 480 380 23 70 560 510 89 533 300 J+33 90 590 540 0.2 U 0.05 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.05 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 2 J+10 U 1.8 J+12.7 J+115 82 529 0.56 1 U 0.5 U 0.54 J+0.15 J 11.9 12.8 1.2 1 U 0.5 U 0.64 0.15 J 11.6 15.2 28.4 8.27 9 0.68 0.94 4.5 21 34.4 8.7 9 0.91 J+1.3 4.5 23.4 5000 U 2570 2700 J 5000 U 5000 U 4320 J 4390 J 0.5 U 1 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 21100 11300 7040 17400 18600 17200 16600 160 84 53 310 290 290 340 180 108 42 340 280 300 330 0.1 U 0.2 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.2 U 0.1 U 0.1 U 0.1 U 0.1 U 0.044 J 1 U 0.3 U 1 U 0.95 J 1 U 1 U 1 U 0.6 J 0.3 U 0.56 J 1.5 0.53 J 0.6 J 4.3 29 27 21 J+10 U 9.8 J 2.6 J 4.6 J 20 20 J+11 5.9 J+3.1 J 3.4 J 8.5 J 196000 J+110000 83000 J+188000 171000 152000 157000 1000 U 588 J+2000 U 14000 1000 UJ 650 J 1000 U 24400 5000 U 2700 U 102000 63000 68100 601000 5000 U 10000 U 5000 U 5000 U 5000 U 5000 U 5000 U 73000 67000 19900 64700 47200 58800 63500 73000 J-67000 19900 64700 47200 58800 63500 21700 11000 4500 14200 13300 11400 11100 31 62 J-30 20 U 20 U 20 U 20 U 3900 73000 1800 47800 42700 38200 28700 100 U 100 U 100 U 100 U 100 U 100 U 100 UJ Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 8 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 GWA-3D GWA-3S GWA-3S GWA-4D GWA-4D GWA-4S GWA-4S Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 9/4/2015 6/4/2015 9/4/2015 6/23/2015 9/9/2015 6/19/2015 9/10/2015 N N N N N N N DR-GWA-3D-NS-3Q15 GWA-3S DR-GWA-3S-NS-3Q15 GWA-4D DR-GWA-4D-NS-3Q15 GWA-4S DR-GWA-4S-NS-3Q15 5.47 1.49 0.18 0.51 19.1 22.6 27.1 23.9 5.51 6.9 6.3 6.39 7.42 7.01 14.6 35.84 141.7 281.9 256.9 189.6 303.7 180.6 51.9 60.8 Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 9 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-5BR GWA-5BR GWA-6D GWA-6D GWA-6S GWA-6S MW-21D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/16/2015 9/9/2015 6/29/2015 9/11/2015 6/30/2015 9/12/2015 6/23/2015 N N N N N N N GWA-5BR DR-GWA-5BR-NS-3Q15 GWA-6D DR-GWA-6D-NS-3Q15 GWA-6S DR-GWA-6S-NS-3Q15 MW-21D 5.8 J 100 U 100 U 100 U 100 U 100 U 100 U 187 65 J 120 100 U 1300 220 100 U 0.5 U 0.5 U 0.5 U 0.17 J 2.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.18 J 2.5 U 0.5 U 0.5 U 0.85 0.31 J 0.98 0.96 2.4 J 3.1 0.41 J+ 0.83 0.19 J 0.96 0.79 2.2 J 2.9 0.21 J 73 64 33 42 200 210 34 75 65 35 43 210 220 42 0.2 U 0.2 U 0.2 U 0.2 U 1 U 0.2 U 0.33 0.2 U 0.2 U 0.2 U 0.2 U 1 U 0.2 U 0.2 U 190 190 630 620 620 710 210 190 J+190 610 600 610 700 210 0.08 U 0.08 U 0.08 U 0.08 U 0.4 U 0.08 U 0.07 J 0.08 U 0.08 U 0.08 U 0.08 U 0.4 U 0.08 U 0.08 U 188000 174000 50500 45500 81100 83000 136000 0.27 J+0.52 0.22 J 0.42 J 0.9 J 0.45 J 0.39 J+ 0.5 UJ 0.7 J+1.1 J+0.68 J+3.6 0.75 J+0.31 J+ 0.26 J 0.5 U 0.45 J 0.54 2.5 U 1.6 0.5 U 0.32 J 0.5 U 0.51 0.51 1.3 J 1.8 0.5 U 1 UJ 1 U 0.32 J 0.64 J 5 U 0.29 J 4.5 J+ 1 UJ 1 U 1 UJ 1 U 3.2 J 0.39 J 1.5 J+ 210 190 7400 6700 25300 13600 690 307 260 7400 6700 21200 15200 550 0.1 UJ 0.1 U 0.1 U 0.15 0.5 U 0.1 U 0.73 J+ 0.098 J+0.1 U 0.18 J+0.073 J 1.7 0.077 J 0.76 25900 27900 10400 10900 14100 12500 19100 620 630 1300 1200 3900 3700 940 630 650 1300 1200 3700 3800 920 0.2 UJ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 17 16.9 J+3080 2920 744 J 2740 16.9 J+ 0.44 J 0.22 J 3.3 5.4 13.7 8.6 0.34 J+ 0.55 0.23 J 3 5.2 9.2 8 0.31 J 1 J+0.82 2.2 2 1.4 J 1.8 0.75 J+ 1.1 J+0.85 2.1 J+1.9 2.9 1.9 0.58 J+ 5000 U 5000 U 5000 U 5000 U 12000 10700 5000 U 0.5 U 0.5 U 0.5 U 0.5 U 2.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 2.5 U 0.5 U 0.5 U 29600 21000 28200 27000 24700 26200 15800 2300 2100 190 190 860 680 810 2300 2100 200 200 850 710 960 0.1 UJ 0.1 U 0.1 U 0.1 U 0.14 J 0.1 U 0.1 U 0.1 UJ 0.1 U 0.1 U 0.1 UJ 0.5 U 0.1 UJ 0.1 U 1 U 1 U 1 U 1 U 5 U 1.2 1 U 0.49 J 1 U 1 U 1 U 6.5 1.1 1 U 23 6.6 J 10 U 5.7 J 2.7 J 13 32 J+ 6.6 J 10 U 10 UJ 6.4 J 27 J+4.8 J 10 U 873000 799000 302000 293000 432000 340000 639000 26800 1000 UJ 1400 23200 34800 7800 1000 U 10700 2900 15000 6200 67000 371000 3500 10000 U 5000 U 5000 U 5000 U 5000 U 5000 UJ 5000 U 150000 154000 124000 92100 290000 317000 161000 150000 154000 124000 J+92100 290000 317000 161000 17500 18200 16300 18300 18500 18900 17700 20 U 20 U 22 J+20 UJ 20 U 16 J-20 U 416000 362000 88700 97700 10900 2300 274000 100 U 100 U 100 UJ 100 U 100 U 100 U 100 U Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 10 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 GWA-5BR GWA-5BR GWA-6D GWA-6D GWA-6S GWA-6S MW-21D Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling) 6/16/2015 9/9/2015 6/29/2015 9/11/2015 6/30/2015 9/12/2015 6/23/2015 N N N N N N N GWA-5BR DR-GWA-5BR-NS-3Q15 GWA-6D DR-GWA-6D-NS-3Q15 GWA-6S DR-GWA-6S-NS-3Q15 MW-21D 0.42 0.35 18 0.3 0.2 0.34 23.7 22.4 18.6 20.5 21.1 23.4 6.99 7.08 6.58 6.5 6.8 7.03 3.75 0.55 5.61 5.5 140.2 8.22 1074 1074 460 446.6 687 855 47.2 -76 4.6 -34.7 -92.1 87.5 18.85 19.7 Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 11 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Aluminum D 7429-90-5 --NS µg/L Aluminum T 7429-90-5 --NS µg/L Antimony D 7440-36-0 --NS µg/L Antimony T 7440-36-0 --1 IMAC µg/L Arsenic D 7440-38-2 --NS µg/L Arsenic T 7440-38-2 --10 02L µg/L Barium D 7440-39-3 --NS µg/L Barium T 7440-39-3 --700 02L µg/L Beryllium D 7440-41-7 --NS µg/L Beryllium T 7440-41-7 --4 IMAC µg/L Boron D 7440-42-8 --NS µg/L Boron T 7440-42-8 --700 02L µg/L Cadmium D 7440-43-9 --NS µg/L Cadmium T 7440-43-9 --2 02L µg/L Calcium T 7440-70-2 --NS µg/L Chromium D 7440-47-3 --NS µg/L Chromium T 7440-47-3 --10 02L µg/L Cobalt D 7440-48-4 --NS µg/L Cobalt T 7440-48-4 --1 IMAC µg/L Copper D 7440-50-8 --NS µg/L Copper T 7440-50-8 --1000 02L µg/L Iron D 7439-89-6 --NS µg/L Iron T 7439-89-6 --300 02L µg/L Lead D 7439-92-1 --NS µg/L Lead T 7439-92-1 --15 02L µg/L Magnesium T 7439-95-4 --NS µg/L Manganese D 7439-96-5 --NS µg/L Manganese T 7439-96-5 --50 02L µg/L Mercury D 7439-97-6 --NS µg/L Mercury T 7439-97-6 --1 02L µg/L Methane N 74-82-8 --NS µg/L Molybdenum D 7439-98-7 --NS µg/L Molybdenum T 7439-98-7 --NS µg/L Nickel D 7440-02-0 --NS µg/L Nickel T 7440-02-0 --100 02L µg/L Potassium T 7440-09-7 --NS µg/L Selenium D 7782-49-2 --NS µg/L Selenium T 7782-49-2 --20 02L µg/L Sodium T 7440-23-5 --NS µg/L Strontium D 7440-24-6 --NS µg/L Strontium T 7440-24-6 --NS µg/L Thallium D 7440-28-0 --NS µg/L Thallium T 7440-28-0 --0.2 IMAC µg/L Vanadium D 7440-62-2 --NS µg/L Vanadium T 7440-62-2 --0.3 IMAC µg/L Zinc D 7440-66-6 --NS µg/L Zinc T 7440-66-6 --1000 02L µg/L Total Dissolved Solids N TDS --500000 02L µg/L Total Organic Carbon N TOC --NS µg/L Total Suspended Solids N TSS --NS µg/L Alkalinity, CO3 N ALK-CO3 --NS µg/L Alkalinity, HCO3 N ALK-HCO3 --NS µg/L Alkalinity, lab N ALK-LAB --NS µg/L Chloride N 16887-00-6 --250000 02L µg/L Nitrite as N N 14797-65-0 --1000 02L µg/L Nitrogen, NO2 plus NO3 N NO2-NO3 --NS µg/L Sulfate N 14808-79-8 --250000 02L µg/L Sulfide N 18496-25-8 --NS µg/L As(III)T 7784-46-5 --NS µg/L As(V)T 10103-60-3 --NS µg/L Chromium (VI)T 18540-29-9 --0.07 DHHS µg/L Fe(II)T 1345-25-1 --NS µg/L Fe(III)T 1309-37-1 --NS µg/L Mn(II)T 1344-43-0 --NS µg/L Mn(IV)T 1313-13-9 --NS µg/L Se(IV)T 10102-18-8 --NS µg/L Se(VI)T 13410-01-0 --NS µg/L Uranium, Natural T 7440-61-1 --NS µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-21D MW-21D MW-21S MW-21S Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/24/2015 9/10/2015 6/24/2015 9/10/2015 N N N N MW-21D DR-MW-21D-NS-3Q15 MW-21S DR-MW-21S-NS-3Q15 100 U 100 U 100 U 250 100 U 94 J 0.5 U 0.3 J 0.18 J 0.5 U 0.29 J 0.5 U 0.12 J 16.9 34.2 0.17 J 16.8 42.8 38 33 40 40 38 45 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 210 180 250 210 190 260 0.08 U 0.03 J 0.08 U 0.08 U 0.08 U 0.08 U 144000 22000 23400 0.19 J 0.22 J+0.5 U 0.92 0.28 J+0.34 J 0.5 U 0.72 1.1 0.5 U 0.79 1.5 3.8 1 UJ 0.27 J 1.2 1 UJ 1 U 160 50 U 50 U 440 50 U 120 0.25 0.1 UJ 0.1 U 0.45 0.1 U 0.088 J 19900 5420 6160 870 640 740 850 670 760 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 35.8 J 8.5 J+764 J 0.32 J 20.7 19.7 0.3 J 19.9 24.3 0.6 1.2 J+1.2 1 1.1 J+1.6 5000 U 4080 J 4880 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 18300 12900 15600 950 320 420 890 370 420 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 1 U 1.6 0.41 J 0.72 J 1.5 0.76 J 10 U 10 UJ 10 U 2.9 J 10 UJ 2.9 J 599000 137000 151000 1000 U 1000 U 650 J 4700 5000 U 4000 5000 U 5000 U 5000 U 152000 58200 76900 152000 58200 76900 17900 11200 11700 20 U 20 UJ 20 U 269000 37000 23200 100 U 100 U 100 U 0.2 U 1.04 0.2 U 17.9 0.0103303103000000 0.029 J+ 192 20 U 431 7.1 1020 645 17.44583628380 24.6 0.5 U 0.5 U 0.5 U 0.5 U Table 2-9 Groundwater Results Downgradient of the Ash Basin and Ash Storage Areas - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 12 of 12 Constituent Fraction CAS RN Criteria Min (range only) Groundwater Criteria Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Radium-226 T 13982-63-3 --NS pCi/L Radium-228 T 15262-20-1 --NS pCi/L Uranium-233 T 13968-55-3 --NS µg/L Uranium-234 T 13966-29-5 --NS µg/L Uranium-236 T 13982-70-2 --NS µg/L Dissolved Oxygen N DO --NS mg/L Temp (Celcius)N TEMP --NS Deg C pH (field)N PH 6.5 8.5 02L SU Turbidity, field N TURB --NS NTU Spec. Cond. (field)N SC --NS µS/cm Oxidation Reduction Potential N ORP --NS mV GW Depth (TOC)N GW_DEPTH-TOC --NS ft Notes: µg/L = micrograms per liter µS/cm = microsiemens per centimeter ft = feet 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 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 MW-21D MW-21D MW-21S MW-21S Round 1 (CSA Sampling)Round 2 (3Q-2015)Round 1 (CSA Sampling)Round 2 (3Q-2015) 6/24/2015 9/10/2015 6/24/2015 9/10/2015 N N N N MW-21D DR-MW-21D-NS-3Q15 MW-21S DR-MW-21S-NS-3Q15 0.47 0.5 18.5 19.2 7.11 6.69 8.6 5.1 820 250 -12 140 3.9 5.18 Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 6 Well Matrix Event Date Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag AB-10D WG Round 1 6/24/2015 --------4.51 -1.9 ---------1.1 --------- AB-10D WG Round 2 9/11/2015 9.4 -12.2 -------1.4 ---------1.9 --------- AB-10S PW Round 1 6/26/2015 82.63 -6.46 -------1.3 -233 -------8.5 -7600 ---860 --- AB-10S PW Round 2 9/11/2015 10 -----------334 J+------6.2 -9700 ---840 --- AB-10SL PW Round 1 6/26/2015 125.9 -8.61 -----0.678 -9.8 ---------1.8 -2900 ---250 --- AB-10SL PW Round 2 9/11/2015 154.2 -8.9 -------2.4 -16.2 J+----12.9 -5.2 -3800 ---150 --- AB-15S PW Round 1 6/22/2015 1000 -8.51 -------6.7 -442 -12.1 ---50 -34.1 -5800 -77.4 -170 --- AB-25BR WG Round 1 6/26/2015 3.31 -9.12 ---------------30.1 ----------- AB-25BR WG Round 2 9/11/2015 5.13 -----------------13.4 -------59 --- AB-25D WG Round 1 6/26/2015 6.11 ---------1.7 -----840 ---------180 --- AB-25D WG Round 2 9/12/2015 16.71 ---------------830 -----330 ---550 --- AB-25S PW Round 1 6/26/2015 4.4 ---------1.6 -96.4 -------------72 --- AB-25S PW Round 2 9/11/2015 34.36 ---------3.6 -417 -7.2 ---363 -109 -98900 -62.2 -3400 -30.4 - AB-30BR WG Round 1 6/24/2015 ----------------------490 ---370 --- AB-30BR WG Round 2 9/10/2015 9.4 ---------------------460 ---380 --- AB-30D WG Round 1 6/24/2015 --------1.38 -1.5 ---------------430 --- AB-30D WG Round 2 9/11/2015 9.7 ---------------------380 ---360 --- AB-30S WG Round 1 6/29/2015 7.9 -4.92 -------2.6 J --------29 -----1500 --- AB-30S WG Round 2 9/10/2015 8.2 -4.9 ---------------10.4 -30.7 -4200 ---1100 --- AB-35BR WG Round 1 6/25/2015 6.27 -------0.871 J --11.7 -------------410 --- AB-35BR WG Round 2 9/10/2015 7.77 -----------10.5 J ------------220 --- AB-5D WG Round 1 6/18/2015 --------------------------1000 --- AB-5D WG Round 2 9/9/2015 8.5 -6.3 ---------13.9 -------5.5 -1400 ---1300 --- AB-5S PW Round 1 6/19/2015 7.1 -----------145 -------28.2 -25100 ---1500 --- AB-5S PW Round 2 9/9/2015 7.5 -6.4 -------1.7 -225 -----11.3 -25.3 -29700 ---1400 --- AS-10D WG Round 1 6/8/2015 3.58 -10.67 -------2.9 -----------------35.3 - AS-10D WG Round 2 9/8/2015 4.3 -10.7 -------3.8 -----------------31 - AS-12S WG Round 1 6/9/2015 ----------------1000 ---2.2 -928 ---430 --- AS-12S WG Round 1 6/9/2015 9.26 -5.95 --------------------------- AS-12S WG Round 2 9/8/2015 1.47 -6.1 -------------1200 ---1.3 -450 ---320 --- AS-2D WG Round 1 6/17/2015 6.12 -6.32 -----------------2.1 -2900 ---1500 --- AS-2D WG Round 2 9/3/2015 --------------------1.2 -2800 ---2100 --- AS-4D WG Round 1 6/5/2015 7.49 -6.24 -------------810 ---4 -4480 ---770 --- AS-4D WG Round 2 9/3/2015 ----------------930 ---2.9 -----870 --- AS-6D WG Round 1 6/8/2015 9.3 -6.02 -----------------1.1 -3920 ---270 --- AS-6D WG Round 2 9/8/2015 8.32 -6 -------------------3400 ---250 --- AS-8BR WG Round 1 6/9/2015 51.38 ---------------------466 ---910 --- AS-8BR WG Round 2 9/8/2015 0.88 -------------------------950 --- AS-8D WG Round 1 6/2/2015 38.05 ---------------------2900 ---1140 --- AS-8D WG Round 2 9/9/2015 7.1 ---------------------890 ---1000 --- BG-1D WG Round 3 11/16/2015 0.85 -11.4 -----24.9 ---------25.3 ----------- BG-1D WG Round 4 12/15/2015 --------16.9 ---------16.1 ----------- BG-5D WG Round 1 6/23/2015 3.81 -------------------------910 --- BG-5D WG Round 2 9/9/2015 7 ---------------------510 ---580 --- BG-5D WG Round 3 11/16/2015 1.05 -------------------------100 --- BG-5D WG Round 4 12/15/2015 --------------------------130 --- BG-5S WG Round 1 6/24/2015 --------------------2.1 -890 ---110 --- BG-5S WG Round 2 9/9/2015 4 -6.2 -------------------1100 ---120 --- BG-5S WG Round 3 11/16/2015 3.07 -6.2 -----0.35 --------------------- BG-5S WG Round 4 12/15/2015 --------0.41 --------------------- GWA-10D WG Round 1 6/4/2015 7.65 -5.82 -----------------3.45 -6040 ---509 --- GWA-10D WG Round 1 6/26/2015 --------0.105 --------------------- GWA-10D WG Round 2 9/8/2015 8.69 -5.4 ---------------23.3 -1.1 -1100 ---130 --- GWA-11D WG Round 1 6/5/2015 9.23 -------------------1.4 -1700 ---810 --- GWA-11D WG Round 2 9/3/2015 ------------------22.2 -1.7 -3200 ---980 --- GWA-11S WG Round 1 6/10/2015 7.93 -5.83 ---------------15.6 -3.3 -----1200 --- GWA-11S WG Round 2 9/3/2015 --------------------3 -----910 --- GWA-12D WG Round 1 6/4/2015 8.35 ----------------------------- GWA-12D WG Round 2 9/9/2015 4.9 ----------------------------- GWA-12D WG Round 3 11/19/2015 7.13 ----------------------------- GWA-12D WG Round 4 12/15/2015 2.5 ----------------------------- GWA-12S WG Round 1 6/4/2015 2.38 -5.45 -----------------------150 --- GWA-12S WG Round 2 9/11/2015 87.1 -5.6 -------------------460 ------- GWA-12S WG Round 4 12/18/2015 --------0.26 -------------890 ------- GWA-14D WG Round 1 6/30/2015 4.73 -------------------------300 --- GWA-14D WG Round 2 9/9/2015 3.17 ----------------------------- GWA-14S WG Round 2 9/9/2015 2.92 -5.9 ---------------13.6 -3.5 -3200 ---2300 --- GWA-15D WG Round 1 6/30/2015 4.52 ---------------------840 ---270 --- GWA-15D WG Round 2 9/10/2015 8.9 ---------------------980 ---220 --- Selenium T µg/L 20 02L Lead T µg/L 15 02L Manganese T µg/L 50 02L Cobalt T µg/L 1 IMAC Iron T µg/L 300 02L Boron T µg/L 700 02L Chromium T µg/L 10 02L Arsenic T µg/L 10 02L Beryllium T µg/L 4 IMAC Chromium (VI) T µg/L 0.07 DHHS Antimony T µg/L 1 IMAC Iron T µg/L 300 02L Manganese T µg/L 50 02L Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: pH N SU 8.5 02L Turbidity, field N NTU - - PPBC (Minimum (for ranges)): PPBC: 6.65 6.78 SCREENING ONLY ---- 1 --------- 10 10 63 0.09 1 1 0.2 50 5 0.5 10 10 63 Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 6 Well Matrix Event Date Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Selenium T µg/L 20 02L Lead T µg/L 15 02L Manganese T µg/L 50 02L Cobalt T µg/L 1 IMAC Iron T µg/L 300 02L Boron T µg/L 700 02L Chromium T µg/L 10 02L Arsenic T µg/L 10 02L Beryllium T µg/L 4 IMAC Chromium (VI) T µg/L 0.07 DHHS Antimony T µg/L 1 IMAC Iron T µg/L 300 02L Manganese T µg/L 50 02L Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: pH N SU 8.5 02L Turbidity, field N NTU - - PPBC (Minimum (for ranges)): PPBC: 6.65 6.78 SCREENING ONLY ---- 1 --------- 10 10 63 0.09 1 1 0.2 50 5 0.5 10 10 63 GWA-1D WG Round 1 6/11/2015 18.83 ---------------------719 ---680 --- GWA-1D WG Round 2 9/8/2015 8.2 -9.1 -------1.3 ---------------300 J+-- GWA-1S WG Round 1 6/17/2015 26.12 -5.97 ---------------13.8 -3 -1200 ---120 --- GWA-1S WG Round 2 9/9/2015 9.7 -5.7 -----------------1.5 -----74 --- GWA-2D WG Round 1 6/10/2015 26.09 -8.98 -------2.2 ------------------- GWA-2D WG Round 2 9/8/2015 14.98 -------------------------280 --- GWA-2S WG Round 1 6/11/2015 8.13 -5.74 -----------------2.3 -909 ---94 --- GWA-2S WG Round 2 9/4/2015 --------------------1.4 J+1600 J+------ GWA-3D WG Round 1 6/4/2015 7.58 -5.7 ---------------17.7 -1.02 -411 ---122 --- GWA-3D WG Round 2 9/4/2015 ------------------39.7 -1.1 -460 ---89 --- GWA-3S WG Round 1 6/4/2015 7.42 -5.51 -----------------12.2 -----533 --- GWA-3S WG Round 2 9/4/2015 --------------------10.8 -----300 J+-- GWA-4D WG Round 1 6/23/2015 7.01 ---------------------370 J+------ GWA-4D WG Round 2 9/9/2015 14.6 -6.3 -------------------330 ---90 --- GWA-4S WG Round 1 6/19/2015 --------------------2.7 -530 ---590 --- GWA-4S WG Round 2 9/10/2015 35.84 -6.39 ---------------35.2 -3.8 -2400 ---540 --- GWA-5BR WG Round 1 6/16/2015 3.75 ---------------------307 ---630 --- GWA-5BR WG Round 2 9/9/2015 0.55 -------------------------650 --- GWA-6D WG Round 1 6/29/2015 5.61 ---------------------7400 ---1300 --- GWA-6D WG Round 2 9/11/2015 5.5 ---------------------6700 ---1200 --- GWA-6S WG Round 1 6/30/2015 --------------------1.3 J 21200 ---3700 --- GWA-6S WG Round 2 9/12/2015 140.2 -------------------1.8 -15200 ---3800 --- GWA-7D WG Round 1 6/16/2015 8.58 -6.01 -----------------2.8 -1610 ---1000 --- GWA-7D WG Round 2 9/10/2015 9.3 -6.2 -----------------2.8 -1800 ---910 --- GWA-7S WG Round 1 6/19/2015 9 -5.39 -----------------17.7 -310 ---950 --- GWA-7S WG Round 2 9/10/2015 6.6 -4.9 -----------7.7 -----14.6 -----1200 --- GWA-8D WG Round 1 6/5/2015 9.74 ---------------------413 ---1200 --- GWA-8D WG Round 2 9/9/2015 17.1 ---------------------420 ---1700 --- GWA-8S WG Round 1 6/18/2015 --------------------9.7 -----1700 --- GWA-9D WG Round 1 6/15/2015 16.28 -6.4 -----------------1.2 -3290 ---640 --- GWA-9D WG Round 2 9/9/2015 0.9 -6.2 -------------------2000 ---720 --- GWA-9D WG Round 3 11/16/2015 9.97 -6.1 -------------------2600 ---620 --- GWA-9D WG Round 4 12/15/2015 1.9 -5.8 -------------------2300 ---530 --- GWA-9S WG Round 1 6/19/2015 235.9 -5.55 -----------------9.3 -5100 ---220 --- GWA-9S WG Round 2 9/9/2015 7.2 -5.1 -----------------4.7 -750 ---110 --- GWA-9S WG Round 3 11/16/2015 9.24 -5.3 -----0.083 -----------6.7 -----140 --- GWA-9S WG Round 4 12/15/2015 8.2 -5.3 -----------------6.5 -370 ---160 --- MW-10 WG Round 2 9/11/2015 5.4 -6.21 --------------------------- MW-10D WG Round 1 6/24/2015 1.2 -6.2 -----------------------1000 --- MW-10D WG Round 2 9/11/2015 1.1 -6.22 -----------------------930 --- MW-11 WG Round 1 6/29/2015 5.53 -4.77 -----------------29.2 -400 ---880 --- MW-11 WG Round 2 9/11/2015 26 -3.11 -----------------30.5 -1300 ---910 --- MW-11D WG Round 1 6/29/2015 5.26 ---------------------850 ---130 --- MW-11D WG Round 2 9/11/2015 2.7 ---------------------710 ---160 --- MW-12 WG Round 1 6/20/2015 51.04 -5.58 -----------------10.1 -3600 ---450 --- MW-12 WG Round 2 9/9/2015 8.2 -5.6 -----------------8.9 -2900 ---470 --- MW-12D WG Round 1 6/20/2015 29.71 -6.18 -----------------4.8 -6100 ---1400 --- MW-12D WG Round 2 9/9/2015 4.89 -6.1 -----------------4.6 -4900 ---1400 --- MW-20D WG Round 1 6/24/2015 9.67 -------------------------500 --- MW-20S WG Round 1 6/24/2015 --------------------2.1 -2800 ---820 --- MW-21D WG Round 1 6/23/2015 8.22 ---------------------550 ---920 --- MW-21D WG Round 2 9/10/2015 8.6 ---------------------440 ---850 --- MW-21S WG Round 1 6/24/2015 ------------16.8 -------------670 --- MW-21S WG Round 2 9/10/2015 5.1 -----------42.8 -------1.5 -----760 --- MW-22BR WG Round 1 6/25/2015 ----------------------760 ---270 --- MW-22BR WG Round 2 9/11/2015 7.5 ---------------------1600 ---310 --- MW-22S WG Round 1 6/25/2015 6.99 ---------------------15600 ---950 --- MW-23BR WG Round 1 6/1/2015 0.22 ---------1.21 ------------------- MW-23BR WG Round 2 9/10/2015 6.1 ---------------------1000 ------- MW-23BR WG Round 4 12/15/2015 1.2 ---516 -----------------1200 J ------ MW-23D WG Round 1 6/30/2015 51.69 -------0.089 J ----------------280 --- MW-23D WG Round 4 12/15/2015 9.73 -5.95 ---272 J+1.1 --------------------- MW-301BR WG Round 1 6/11/2015 9.78 ---------------------383 J+--410 --- MW-301BR WG Round 2 9/4/2015 ----------------------690 J+--400 J+-- MW-303BR WG Round 1 6/12/2015 9.25 ---------------------2760 ---500 --- MW-303BR WG Round 2 9/4/2015 ----------------------3400 J+--590 J+-- MW-306BR WG Round 1 6/12/2015 8.39 ---------------920 -----623 J --920 --- MW-306BR WG Round 2 9/4/2015 ----------------1700 ---1.4 -4000 ---2400 --- MW-308BR WG Round 1 6/15/2015 5.45 ---------------------1910 ---2200 --- Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 3 of 6 Well Matrix Event Date Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Selenium T µg/L 20 02L Lead T µg/L 15 02L Manganese T µg/L 50 02L Cobalt T µg/L 1 IMAC Iron T µg/L 300 02L Boron T µg/L 700 02L Chromium T µg/L 10 02L Arsenic T µg/L 10 02L Beryllium T µg/L 4 IMAC Chromium (VI) T µg/L 0.07 DHHS Antimony T µg/L 1 IMAC Iron T µg/L 300 02L Manganese T µg/L 50 02L Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: pH N SU 8.5 02L Turbidity, field N NTU - - PPBC (Minimum (for ranges)): PPBC: 6.65 6.78 SCREENING ONLY ---- 1 --------- 10 10 63 0.09 1 1 0.2 50 5 0.5 10 10 63 MW-308BR WG Round 2 9/9/2015 6.2 -------------------9.3 -5300 ---5400 --- MW-310BR WG Round 1 6/16/2015 9.92 ---------------------377 ---110 --- MW-310BR WG Round 2 9/9/2015 9.1 -8.8 -------------------410 ------- MW-311BR WG Round 1 6/29/2015 39.18 ---------------------1200 ---580 --- MW-311BR WG Round 2 9/11/2015 20.6 ---------------810 -----1100 ---540 --- MW-314BR WG Round 1 6/25/2015 7.63 ---------------------380 ------- MW-314BR WG Round 2 9/11/2015 8.35 ---------1.6 ---------------65 --- MW-315BR WG Round 1 6/19/2015 13.34 -----------------24.8 -2.2 -1300 ---1800 --- MW-315BR WG Round 2 9/8/2015 21.23 -------------------2.6 --------- MW-317BR WG Round 1 6/5/2015 3.12 -11.44 -------2.1 -------11 ----------- MW-317BR WG Round 2 9/8/2015 7.4 -11.6 -------5.6 -------14.8 ----------- MW-318D WG Round 1 6/2/2015 10.63 -5.51 -------------1310 ---13 J 1150 ---577 --- MW-318D WG Round 2 9/9/2015 6.08 -5.23 -------------1300 ---6.7 -720 ---430 --- MW-9 WG Round 1 6/30/2015 84.09 -------------------6.4 -990 ---1000 --- MW-9D WG Round 1 6/24/2015 66 ---------------1000 ---1.5 -2600 ---600 --- MW-9D WG Round 2 9/11/2015 48.29 -6.44 -------------1100 ---2.7 -1400 ---1100 --- OW-303D WG Round 2 9/12/2015 ----------2.9 -55 ---1000 -15.1 -53.2 -14900 ---4500 --- OW-308D WG Round 1 6/25/2015 4.53 -6.2 ---------620 ---------36400 ---580 --- OW-308D WG Round 2 9/11/2015 8.5 -6.2 ---------759 ---------34700 ---690 --- OW-310D WG Round 1 6/23/2015 2.28 -----------809 ---1100 ---1.2 -1400 ---1200 --- OW-310D WG Round 2 9/11/2015 5.82 -----------782 ---980 ---1.9 -3500 ---1600 --- Notes: Orange indicates concentration greater than PPBC Green indicates concentration less than PPBC µg/L = micrograms per liter SU = standard unit J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 02L = North Carolina groundwater standards as specified in T15A NCAC 02L IMAC = Interim Maximum Allow Concentration N = normal NTU = nephelometric turbidity unit PPBC = Proposed Provisional Background Concentration PW = porewater T = total WG = groundwater U = results not detected at 1. This table only shows concentrations of constituents that exceed and regulatory standard or IMAC. 2. If a constituent does not have a regulatory criterion (aluminum, molybdenum, strontium), it is not shown on this table. Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 4 of 6 Well Matrix Event Date AB-10D WG Round 1 6/24/2015 AB-10D WG Round 2 9/11/2015 AB-10S PW Round 1 6/26/2015 AB-10S PW Round 2 9/11/2015 AB-10SL PW Round 1 6/26/2015 AB-10SL PW Round 2 9/11/2015 AB-15S PW Round 1 6/22/2015 AB-25BR WG Round 1 6/26/2015 AB-25BR WG Round 2 9/11/2015 AB-25D WG Round 1 6/26/2015 AB-25D WG Round 2 9/12/2015 AB-25S PW Round 1 6/26/2015 AB-25S PW Round 2 9/11/2015 AB-30BR WG Round 1 6/24/2015 AB-30BR WG Round 2 9/10/2015 AB-30D WG Round 1 6/24/2015 AB-30D WG Round 2 9/11/2015 AB-30S WG Round 1 6/29/2015 AB-30S WG Round 2 9/10/2015 AB-35BR WG Round 1 6/25/2015 AB-35BR WG Round 2 9/10/2015 AB-5D WG Round 1 6/18/2015 AB-5D WG Round 2 9/9/2015 AB-5S PW Round 1 6/19/2015 AB-5S PW Round 2 9/9/2015 AS-10D WG Round 1 6/8/2015 AS-10D WG Round 2 9/8/2015 AS-12S WG Round 1 6/9/2015 AS-12S WG Round 1 6/9/2015 AS-12S WG Round 2 9/8/2015 AS-2D WG Round 1 6/17/2015 AS-2D WG Round 2 9/3/2015 AS-4D WG Round 1 6/5/2015 AS-4D WG Round 2 9/3/2015 AS-6D WG Round 1 6/8/2015 AS-6D WG Round 2 9/8/2015 AS-8BR WG Round 1 6/9/2015 AS-8BR WG Round 2 9/8/2015 AS-8D WG Round 1 6/2/2015 AS-8D WG Round 2 9/9/2015 BG-1D WG Round 3 11/16/2015 BG-1D WG Round 4 12/15/2015 BG-5D WG Round 1 6/23/2015 BG-5D WG Round 2 9/9/2015 BG-5D WG Round 3 11/16/2015 BG-5D WG Round 4 12/15/2015 BG-5S WG Round 1 6/24/2015 BG-5S WG Round 2 9/9/2015 BG-5S WG Round 3 11/16/2015 BG-5S WG Round 4 12/15/2015 GWA-10D WG Round 1 6/4/2015 GWA-10D WG Round 1 6/26/2015 GWA-10D WG Round 2 9/8/2015 GWA-11D WG Round 1 6/5/2015 GWA-11D WG Round 2 9/3/2015 GWA-11S WG Round 1 6/10/2015 GWA-11S WG Round 2 9/3/2015 GWA-12D WG Round 1 6/4/2015 GWA-12D WG Round 2 9/9/2015 GWA-12D WG Round 3 11/19/2015 GWA-12D WG Round 4 12/15/2015 GWA-12S WG Round 1 6/4/2015 GWA-12S WG Round 2 9/11/2015 GWA-12S WG Round 4 12/18/2015 GWA-14D WG Round 1 6/30/2015 GWA-14D WG Round 2 9/9/2015 GWA-14S WG Round 2 9/9/2015 GWA-15D WG Round 1 6/30/2015 GWA-15D WG Round 2 9/10/2015 Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: PPBC (Minimum (for ranges)): PPBC: Result Flag Result Flag Result Flag Result Flag --1.5 ----- --0.63 J 1320000 --- 0.54 -3 ----- 0.31 -3.3 ----- --14.6 ----- 0.44 -30.7 ----- 3.4 -254 ----- --5.5 ----- --1.7 ----- --0.69 J ---- --0.64 J ---- --13.3 ----- 1.5 -689 ----- --0.91 J ---- --0.67 J ---- --0.86 J ---- --1.1 ----- -------- --18.3 ----- --1.8 ----- --1.8 J 905000 J -- --0.77 J ---- -------- 0.69 -0.62 J ---- 1.6 -33.7 ----- --15.3 ----- --30.6 ----- --1.1 ----- -------- --0.52 J ---- --1.6 ----- --1.4 ----- --4.8 ----- -------- --0.69 J+---- --0.4 J ---- --2.7 ----- -------- --1.88 J ---- -------- --45.8 ----- --43 ----- -------- --0.46 J ---- -------- -------- --2.6 ----- --0.82 J ---- --0.31 J ---- -------- 0.256 -3.36 ----- -------- --1.3 ----- --1.2 J+---- --0.45 J ---- --0.52 J ---- --0.63 J ---- --5.65 ----- --3.7 ----- --3.1 ----- --2.3 ----- -------- --0.93 J ---- --2.4 J+---- --0.67 J ---- --0.62 J ---- --0.48 J ---- --1.5 -705000 -307000 - --3.2 -618000 -301000 - Vanadium T µg/L 0.3 IMAC Thallium T µg/L 0.2 IMAC Sulfate N µg/L 250000 02L otal Dissolved Solid N µg/L 500000 02L 1 280000 31000 ---- 0.2 Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 5 of 6 Well Matrix Event Date Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: PPBC (Minimum (for ranges)): PPBC: GWA-1D WG Round 1 6/11/2015 GWA-1D WG Round 2 9/8/2015 GWA-1S WG Round 1 6/17/2015 GWA-1S WG Round 2 9/9/2015 GWA-2D WG Round 1 6/10/2015 GWA-2D WG Round 2 9/8/2015 GWA-2S WG Round 1 6/11/2015 GWA-2S WG Round 2 9/4/2015 GWA-3D WG Round 1 6/4/2015 GWA-3D WG Round 2 9/4/2015 GWA-3S WG Round 1 6/4/2015 GWA-3S WG Round 2 9/4/2015 GWA-4D WG Round 1 6/23/2015 GWA-4D WG Round 2 9/9/2015 GWA-4S WG Round 1 6/19/2015 GWA-4S WG Round 2 9/10/2015 GWA-5BR WG Round 1 6/16/2015 GWA-5BR WG Round 2 9/9/2015 GWA-6D WG Round 1 6/29/2015 GWA-6D WG Round 2 9/11/2015 GWA-6S WG Round 1 6/30/2015 GWA-6S WG Round 2 9/12/2015 GWA-7D WG Round 1 6/16/2015 GWA-7D WG Round 2 9/10/2015 GWA-7S WG Round 1 6/19/2015 GWA-7S WG Round 2 9/10/2015 GWA-8D WG Round 1 6/5/2015 GWA-8D WG Round 2 9/9/2015 GWA-8S WG Round 1 6/18/2015 GWA-9D WG Round 1 6/15/2015 GWA-9D WG Round 2 9/9/2015 GWA-9D WG Round 3 11/16/2015 GWA-9D WG Round 4 12/15/2015 GWA-9S WG Round 1 6/19/2015 GWA-9S WG Round 2 9/9/2015 GWA-9S WG Round 3 11/16/2015 GWA-9S WG Round 4 12/15/2015 MW-10 WG Round 2 9/11/2015 MW-10D WG Round 1 6/24/2015 MW-10D WG Round 2 9/11/2015 MW-11 WG Round 1 6/29/2015 MW-11 WG Round 2 9/11/2015 MW-11D WG Round 1 6/29/2015 MW-11D WG Round 2 9/11/2015 MW-12 WG Round 1 6/20/2015 MW-12 WG Round 2 9/9/2015 MW-12D WG Round 1 6/20/2015 MW-12D WG Round 2 9/9/2015 MW-20D WG Round 1 6/24/2015 MW-20S WG Round 1 6/24/2015 MW-21D WG Round 1 6/23/2015 MW-21D WG Round 2 9/10/2015 MW-21S WG Round 1 6/24/2015 MW-21S WG Round 2 9/10/2015 MW-22BR WG Round 1 6/25/2015 MW-22BR WG Round 2 9/11/2015 MW-22S WG Round 1 6/25/2015 MW-23BR WG Round 1 6/1/2015 MW-23BR WG Round 2 9/10/2015 MW-23BR WG Round 4 12/15/2015 MW-23D WG Round 1 6/30/2015 MW-23D WG Round 4 12/15/2015 MW-301BR WG Round 1 6/11/2015 MW-301BR WG Round 2 9/4/2015 MW-303BR WG Round 1 6/12/2015 MW-303BR WG Round 2 9/4/2015 MW-306BR WG Round 1 6/12/2015 MW-306BR WG Round 2 9/4/2015 MW-308BR WG Round 1 6/15/2015 Result Flag Result Flag Result Flag Result Flag Vanadium T µg/L 0.3 IMAC Thallium T µg/L 0.2 IMAC Sulfate N µg/L 250000 02L otal Dissolved Solid N µg/L 500000 02L 1 280000 31000 ---- 0.2 --0.79 J ---- --0.45 J ---- --1.5 ----- --0.39 J ---- --0.57 J ---- --0.65 J ---- --1.3 ----- --4.1 ----- -------- --0.6 J ---- -------- --0.56 J ---- --1.5 ----- --0.53 J ---- --0.6 J ---- --4.3 ----- --0.49 J 873000 -416000 - ----799000 -362000 - -------- -------- --6.5 ----- --1.1 ----- -------- -------- --0.38 J ---- -------- --5.2 -690000 J-368000 - --1.3 -726000 -346000 - --0.45 J ---- --1.8 ----- -------- --0.38 J ---- --0.39 J ---- --5.1 ----- --0.59 J ---- --0.65 J ---- --0.74 J ---- -------- -------- -------- --2.6 ----- --0.58 J ---- -------- --0.51 J ---- --2.6 ----- -------- --1.4 ----- -------- --0.41 J ---- -------- ----639000 -274000 - --0.72 J 599000 -269000 - --1.5 ----- --0.76 J ---- --0.33 J ---- --1.2 ----- --0.74 J ---- 0.55 -1.38 ----- -------- --0.31 J ---- -------- --1.2 ----- --1.8 ----- --0.81 J ---- --3.7 ----- --2 ----- --1.6 -530000 --- --1.6 -778000 J+345000 - --0.84 J 844000 -323000 - Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 6 of 6 Well Matrix Event Date Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: PPBC (Minimum (for ranges)): PPBC: MW-308BR WG Round 2 9/9/2015 MW-310BR WG Round 1 6/16/2015 MW-310BR WG Round 2 9/9/2015 MW-311BR WG Round 1 6/29/2015 MW-311BR WG Round 2 9/11/2015 MW-314BR WG Round 1 6/25/2015 MW-314BR WG Round 2 9/11/2015 MW-315BR WG Round 1 6/19/2015 MW-315BR WG Round 2 9/8/2015 MW-317BR WG Round 1 6/5/2015 MW-317BR WG Round 2 9/8/2015 MW-318D WG Round 1 6/2/2015 MW-318D WG Round 2 9/9/2015 MW-9 WG Round 1 6/30/2015 MW-9D WG Round 1 6/24/2015 MW-9D WG Round 2 9/11/2015 OW-303D WG Round 2 9/12/2015 OW-308D WG Round 1 6/25/2015 OW-308D WG Round 2 9/11/2015 OW-310D WG Round 1 6/23/2015 OW-310D WG Round 2 9/11/2015 Notes: Orange indicates concentration greater than PPBC Green indicates concentration less than PPBC µg/L = micrograms per liter SU = standard unit J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high 02L = North Carolina groundwater standards as specified in T15A IMAC = Interim Maximum Allow Concentration N = normal NTU = nephelometric turbidity unit PPBC = Proposed Provisional Background Concentration PW = porewater T = total WG = groundwater U = results not detected at 1. This table only shows concentrations of constituents that excee 2. If a constituent does not have a regulatory criterion (aluminum, Result Flag Result Flag Result Flag Result Flag Vanadium T µg/L 0.3 IMAC Thallium T µg/L 0.2 IMAC Sulfate N µg/L 250000 02L otal Dissolved Solid N µg/L 500000 02L 1 280000 31000 ---- 0.2 ----1300000 -586000 - --2.5 ----- --3.7 ----- --0.89 J ---- --0.62 J ---- --1.3 ----- --0.82 J ---- --1.4 ----- --5.5 ----- --8.4 ----- --5.9 ----- --0.654 J ---- -------- --2.3 ----- --11.1 ----- --2.7 ----- 0.56 -36.5 ----- -------- -------- --1.2 ----- --3.2 ----- Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 6 SW-1 SW-1 SW-10 SW-10 SW-11 SW-12 SW-13 SW-13 SW-3 Round 1 Round 2 Round 2 Round 2 Round 2 Round 2 Round 2 Round 2 Round 1 5/27/2015 9/11/2015 9/14/2015 9/14/2015 9/14/2015 9/14/2015 9/14/2015 9/14/2015 5/27/2015 N N N N N N N N N SW-1 DR-SW-1-NS-3Q15 DR-SW-10-NS-3Q15 DR-SW-10-WS-3Q15 DR-SW-11-NS-3Q15 DR-SW-12-NS-3Q15 DR-SW-13-NS-3Q DR-SW-13-NS-3Q15 SW-3 Constituent CAS RN Fraction Criteria Min (range only) 02B Class C Surface Water Criteria Unit Aluminum 7429-90-5 D --µg/L 43 100 U -100 U 100 U 100 U -100 U 12 Aluminum 7429-90-5 T -87 µg/L 613 100 U -330 140 69 J -79 J 27600 Antimony 7440-36-0 D --µg/L 1.02 1.1 -0.5 U 0.5 U 0.5 U -0.5 U 1 U Antimony 7440-36-0 T -640 µg/L 1.21 0.97 -0.15 J 0.5 U 0.5 U -0.5 U 1 U Arsenic 7440-38-2 D -150 µg/L 13.8 31.8 -40.4 1.7 1.6 -0.93 42.7 Arsenic 7440-38-2 T -10 µg/L 15.5 37.9 -49.4 2.1 1.8 -1 63.7 Barium 7440-39-3 D --µg/L 20 110 -34 27 26 -23 42 Barium 7440-39-3 T -200000 µg/L 18 120 -38 30 30 -23 267 Beryllium 7440-41-7 D -6.5 µg/L 1 U 0.2 U -0.2 U 0.2 U 0.2 U -0.2 U 1 U Beryllium 7440-41-7 T --µg/L 1 U 0.2 U -0.2 U 0.2 U 0.2 U -0.2 U 1.16 Boron 7440-42-8 D --µg/L 180 180 -170 120 89 -65 128 Boron 7440-42-8 T --µg/L 157 190 -160 130 100 -62 107 Cadmium 7440-43-9 D -0.15 µg/L 1 U 0.08 U -0.08 U 0.08 U 0.08 U -0.08 U 1 U Cadmium 7440-43-9 T --µg/L 1 U 0.08 U -0.08 U 0.08 U 0.08 U -0.08 U 1 U Calcium 7440-70-2 T --µg/L 19700 20800 -22700 20000 20400 -19300 20000 Chromium 7440-47-3 D -11 µg/L 1 U 0.25 J -0.26 J 0.2 J 0.2 J -0.34 J 1 U Chromium 7440-47-3 T --µg/L 1 U 0.26 J -0.37 J 0.24 J 0.24 J -0.49 J 33.6 Cobalt 7440-48-4 D --µg/L 1 U 0.5 U -0.46 J 0.52 0.59 -0.45 J 1 U Cobalt 7440-48-4 T -4 µg/L 1 U 0.22 J -0.88 0.65 0.9 -0.54 15.5 Copper 7440-50-8 D -2.7 µg/L 3.39 J+0.52 J -2.8 8.7 J 10.7 -2.4 1 UJ Copper 7440-50-8 T --µg/L 4.75 0.3 J -0.63 J 0.54 J 0.61 J -0.65 J 27.3 Iron 7439-89-6 D --µg/L 21 50 U -50 U 50 U 50 U -50 U 40 Iron 7439-89-6 T --µg/L 323 220 -630 310 240 -240 42400 Lead 7439-92-1 D -0.54 µg/L 1 U 0.22 -0.26 0.85 J 1.3 -0.19 1 U Lead 7439-92-1 T --µg/L 1 U 0.06 J -0.36 0.15 0.14 -0.098 J 20.1 Magnesium 7439-95-4 T --µg/L 7240 6680 -6680 6390 6610 -6370 5850 Manganese 7439-96-5 D --µg/L 16 59 -400 250 270 -150 584 Manganese 7439-96-5 T --µg/L 9 140 -520 280 430 -160 1820 Mercury 7439-97-6 T -0.012 µg/L 0.0011 J+0.00778 -0.00125 0.000988 0.000792 -0.000671 0.00385 J+ Methane 74-82-8 N --µg/L 10 UJ 15 -39.1 26.8 45.9 -31.4 20 UJ Molybdenum 7439-98-7 D --µg/L 9.11 10.8 -9.1 5.7 4.1 -2.7 2.56 Molybdenum 7439-98-7 T -2000 µg/L 9.36 9.7 -8.6 6 4.5 -2.7 9.85 Nickel 7440-02-0 D -16 µg/L 1.2 1.6 -0.65 0.76 0.75 -0.47 J 1 U Nickel 7440-02-0 T --µg/L 2.5 1.6 -0.72 0.62 0.63 -0.53 15.9 Potassium 7440-09-7 T --µg/L 3090 5540 -3620 J 2800 J 2660 J -5000 U 3710 Selenium 7782-49-2 D --µg/L 2.32 1.9 -0.5 U 0.5 U 0.5 U -0.5 U 1 U Selenium 7782-49-2 T -5 µg/L 2.87 2 -0.5 U 0.5 U 0.5 U -0.5 U 1 U Sodium 7440-23-5 T --µg/L 11500 8890 -13300 12700 11900 -11100 10800 Strontium 7440-24-6 D --µg/L 322 290 -310 240 220 -210 264 Strontium 7440-24-6 T -40000 µg/L 320 300 -300 250 250 -200 302 Thallium 7440-28-0 D --µg/L 0.2 U 0.021 J -0.1 U 0.1 U 0.1 U -0.1 U 0.2 U Thallium 7440-28-0 T -0.47 µg/L 0.2 U 0.019 J -0.1 U 0.1 U 0.1 U -0.1 U 0.315 Vanadium 7440-62-2 D --µg/L 4.94 2.4 -1 U 1 U 1 U -1 U 1.25 Vanadium 7440-62-2 T --µg/L 6.65 2.5 -0.98 J 0.8 J 0.85 J -0.57 J 54.1 Zinc 7440-66-6 D -36 µg/L 34 J+10 U -8.7 J 10 U 10 U -12 5 UJ Zinc 7440-66-6 T --µg/L 212 10 U -10 U 10 U 10 U -10 U 93 Total Dissolved Solids TDS N --µg/L 140000 136000 -144000 135000 127000 -124000 120000 Total Organic Carbon TOC N --µg/L 3800 4500 -1100 1200 15400 -1600 2200 Total Suspended Solids TSS N --µg/L 16000 3500 -16000 2800 3500 -2600 U 680000 Alkalinity, CO3 ALK-CO3 N --µg/L 11000 5000 U -5000 U 5000 U 5000 U -5000 U 10000 U Alkalinity, HCO3 ALK-HCO3 N --µg/L 23000 45400 -85400 81900 72000 -72800 51000 Alkalinity, lab ALK-LAB N --µg/L 37000 45400 -85400 J-81900 J-72000 J--72800 J-51000 Chloride 16887-00-6 N -230000 µg/L 11000 8900 -11600 11600 11500 -11600 11000 Nitrite as N 14797-65-0 N --µg/L 29 -------76 Nitrogen, NO2 plus NO3 NO2-NO3 N --µg/L ---47 28 J 32 -25 - Sulfate 14808-79-8 N --µg/L 53000 40200 -20100 18100 14700 -12900 23000 Sulfide 18496-25-8 N --µg/L 100 U 100 U -100 U 100 U 100 U -100 U 100 U Arsenic 7440-38-2 T -10 µg/L --47.4 -1.51 J 1.83 0.658 -- Chromium 7440-47-3 T --µg/L --0.474 J -1 J 0.69 J 0.386 J -- Iron 7439-89-6 T --µg/L --155 J -216 J 199 J 195 J -- Manganese 7439-96-5 D --µg/L --434 J -232 J 266 J 141 J -- Manganese 7439-96-5 T --µg/L --425 J -277 J 291 J 156 J -- As(III)7784-46-5 T --µg/L --19.7 -0.841 J 0.971 0.516 -- As(V)10103-60-3 T --µg/L --27.7 -0.668 J 0.857 0.5 U -- Chromium (VI)18540-29-9 T --µg/L --0.012 J -0.018 J 0.016 J 0.019 J -- Fe(II)1345-25-1 T --µg/L --30 UJ -11.4 J 30 UJ 16.1 J -- Fe(III)1309-37-1 T --µg/L --------- Mn(II)1344-43-0 T --µg/L --------- Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 6 SW-1 SW-1 SW-10 SW-10 SW-11 SW-12 SW-13 SW-13 SW-3 Round 1 Round 2 Round 2 Round 2 Round 2 Round 2 Round 2 Round 2 Round 1 5/27/2015 9/11/2015 9/14/2015 9/14/2015 9/14/2015 9/14/2015 9/14/2015 9/14/2015 5/27/2015 N N N N N N N N N SW-1 DR-SW-1-NS-3Q15 DR-SW-10-NS-3Q15 DR-SW-10-WS-3Q15 DR-SW-11-NS-3Q15 DR-SW-12-NS-3Q15 DR-SW-13-NS-3Q DR-SW-13-NS-3Q15 SW-3 Constituent CAS RN Fraction Criteria Min (range only) 02B Class C Surface Water Criteria Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Mn(IV)1313-13-9 T --µg/L --------- Se(IV)10102-18-8 T --µg/L --2 U -2 U 2 U 2 U -- Se(VI)13410-01-0 T --µg/L --2 U -2 U 2 U 2 U -- Dissolved Oxygen DO N --mg/L -2.5 -7.76 ----- Temperature TEMP N --Deg C -27.4 -16.2 ----- pH PH N 6 9 SU -7.3 -7.4 ----- Turbidity, field TURB N --NTU -5.61 -8.85 ----- Specific Conductivity (field)SC N --µS/cm -219.1 -200.9 ----- Oxidation Reduction Potential ORP N --mV -125.7 -148.8 ----- Notes: µg/L = micrograms per liter µS/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 Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 3 of 6 Constituent CAS RN Fraction Criteria Min (range only) 02B Class C Surface Water Criteria Unit Aluminum 7429-90-5 D --µg/L Aluminum 7429-90-5 T -87 µg/L Antimony 7440-36-0 D --µg/L Antimony 7440-36-0 T -640 µg/L Arsenic 7440-38-2 D -150 µg/L Arsenic 7440-38-2 T -10 µg/L Barium 7440-39-3 D --µg/L Barium 7440-39-3 T -200000 µg/L Beryllium 7440-41-7 D -6.5 µg/L Beryllium 7440-41-7 T --µg/L Boron 7440-42-8 D --µg/L Boron 7440-42-8 T --µg/L Cadmium 7440-43-9 D -0.15 µg/L Cadmium 7440-43-9 T --µg/L Calcium 7440-70-2 T --µg/L Chromium 7440-47-3 D -11 µg/L Chromium 7440-47-3 T --µg/L Cobalt 7440-48-4 D --µg/L Cobalt 7440-48-4 T -4 µg/L Copper 7440-50-8 D -2.7 µg/L Copper 7440-50-8 T --µg/L Iron 7439-89-6 D --µg/L Iron 7439-89-6 T --µg/L Lead 7439-92-1 D -0.54 µg/L Lead 7439-92-1 T --µg/L Magnesium 7439-95-4 T --µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T --µg/L Mercury 7439-97-6 T -0.012 µg/L Methane 74-82-8 N --µg/L Molybdenum 7439-98-7 D --µg/L Molybdenum 7439-98-7 T -2000 µg/L Nickel 7440-02-0 D -16 µg/L Nickel 7440-02-0 T --µg/L Potassium 7440-09-7 T --µg/L Selenium 7782-49-2 D --µg/L Selenium 7782-49-2 T -5 µg/L Sodium 7440-23-5 T --µg/L Strontium 7440-24-6 D --µg/L Strontium 7440-24-6 T -40000 µg/L Thallium 7440-28-0 D --µg/L Thallium 7440-28-0 T -0.47 µg/L Vanadium 7440-62-2 D --µg/L Vanadium 7440-62-2 T --µg/L Zinc 7440-66-6 D -36 µg/L Zinc 7440-66-6 T --µg/L Total Dissolved Solids TDS N --µg/L Total Organic Carbon TOC N --µg/L Total Suspended Solids TSS N --µg/L Alkalinity, CO3 ALK-CO3 N --µg/L Alkalinity, HCO3 ALK-HCO3 N --µg/L Alkalinity, lab ALK-LAB N --µg/L Chloride 16887-00-6 N -230000 µg/L Nitrite as N 14797-65-0 N --µg/L Nitrogen, NO2 plus NO3 NO2-NO3 N --µg/L Sulfate 14808-79-8 N --µg/L Sulfide 18496-25-8 N --µg/L Arsenic 7440-38-2 T -10 µg/L Chromium 7440-47-3 T --µg/L Iron 7439-89-6 T --µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T --µg/L As(III)7784-46-5 T --µg/L As(V)10103-60-3 T --µg/L Chromium (VI)18540-29-9 T --µg/L Fe(II)1345-25-1 T --µg/L Fe(III)1309-37-1 T --µg/L Mn(II)1344-43-0 T --µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: SW-3 SW-3 SW-4 SW-4 SW-4 SW-5 SW-5 SW-5 SW-6 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 6/18/2015 9/11/2015 5/27/2015 6/18/2015 9/11/2015 5/27/2015 6/18/2015 9/11/2015 6/30/2015 N N N N N N N N N SW-3 DR-SW-3-NS-3Q15 SW-4 SW-4 DR-SW-4-NS-3Q15 SW-5 SW-5 DR-SW-5-NS-3Q15 SW-6 -100 U 5 U -100 U 5 U -100 U - -250 127 -63 J 90 -100 U - -0.5 U 1 U -0.5 U 1 U -0.41 J 0.17 J -0.5 U 1 U -0.5 U 1 U -0.45 J 0.16 J -1.7 1 U -0.29 J 1 U -0.42 J 0.17 J -2 1 U -0.14 J 1 U -0.48 J 0.24 J -27 18 -20 24 -17 19 -34 18 -22 25 -18 25 -0.2 U 1 U -0.2 U 1 U -0.2 U 0.2 U -0.2 U 1 U -0.2 U 1 U -0.2 U 0.2 U -120 50 U -35 J 58 -74 150 -120 50 U -29 J 57 -72 160 -0.08 U 1 U -0.08 U 1 U -0.08 U 0.08 U -0.08 U 1 U -0.08 U 1 U -0.08 U 0.08 U -20800 14000 -19500 13800 -10700 6300 -0.21 J 1 U -0.24 J 1 U -0.25 J 0.49 J -0.64 1 U -0.3 J 1 U -0.63 0.67 -0.45 J 1 U -0.5 U 1 U -0.16 J 0.15 J -0.87 1 U -0.18 J 1 U -0.21 J 0.48 J -8.6 7.38 J+-8.1 1 U -4.6 2.2 -0.83 J 1 U -0.71 J 4.62 J+-1.2 J+1.6 -30 J 33 -26 J 68 -30 J - -580 339 -170 412 -290 - -1.1 1 U -1 1 U -0.38 0.2 -0.37 1 U -0.087 J 1 U -0.14 0.88 -6160 4390 -5940 5500 -4110 2560 -210 90 -23 315 -89 22 -300 93 -46 290 -98 83 -0.0019 J+0.000978 J+-0.00202 J+0.0012 J+-0.00222 J+0.00334 J+ -26.1 10 UJ -6.1 J+10 UJ -47 J 9.9 J+ -5.9 1 U -0.49 J 1 U -0.61 0.39 J -5.3 1 U -0.46 J 1 U -0.59 0.26 J -0.76 1 U -0.48 J 1 U -0.36 J 0.78 -0.95 1 U -0.36 J 1 U -0.45 J+0.57 -2810 J 1410 -5000 U 2230 -2510 J 5000 U -0.5 U 1 U -0.5 U 1 U -0.5 U 0.5 U -0.5 U 1 U -0.5 U 1 U -0.5 U 0.5 U -13000 8640 -10600 9210 -7210 4010 J -260 143 -210 134 -97 42 -270 151 -200 143 -100 45 -0.1 U 0.2 U -0.1 U 0.2 U -0.1 U 0.025 J -0.1 U 0.2 U -0.1 U 0.2 U -0.1 UJ 0.1 U -0.78 J 0.3 U -0.55 J 0.3 U -0.5 J 1.2 -1.1 0.567 -1 U 0.42 -0.33 J 2.8 -10 U 17 J+-10 U 5 UJ -10 U 4.7 J -10 U 5 U -10 U 5 U -10 U 5 J+ -149000 97000 -126000 110000 -83000 72000 -1600 1500 -2200 2700 -4000 3300 -13100 5000 U -3900 5000 U -2500 U 24700 -5000 U 10000 U -5000 U 10000 U -5000 U 5000 U -69600 52000 -67100 50000 -34700 17600 -69600 52000 -67100 50000 -34700 17600 -12900 10000 -13900 13000 -9400 9400 --145 --300 --- -------110 J-260 -15300 5900 -5500 10000 -6900 5100 -100 U 100 U -100 U 100 U -100 U 100 U --------- --------- --------- --------- --------- 11 --0.054 --0.144 -- 15.6 --0.083 --0.208 -- 0.019 --0.029 --0.017 -- 27.9 --9.3 --30.2 -- 51.5 J+--11.7 J+--28.1 J+-- 242 J---48.3 J---239 J--- Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 4 of 6 Constituent CAS RN Fraction Criteria Min (range only) 02B Class C Surface Water Criteria Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Mn(IV)1313-13-9 T --µg/L Se(IV)10102-18-8 T --µg/L Se(VI)13410-01-0 T --µg/L Dissolved Oxygen DO N --mg/L Temperature TEMP N --Deg C pH PH N 6 9 SU Turbidity, field TURB N --NTU Specific Conductivity (field)SC N --µS/cm Oxidation Reduction Potential ORP N --mV Notes: µg/L = micrograms per liter µS/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 (a 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 SW-3 SW-3 SW-4 SW-4 SW-4 SW-5 SW-5 SW-5 SW-6 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 6/18/2015 9/11/2015 5/27/2015 6/18/2015 9/11/2015 5/27/2015 6/18/2015 9/11/2015 6/30/2015 N N N N N N N N N SW-3 DR-SW-3-NS-3Q15 SW-4 SW-4 DR-SW-4-NS-3Q15 SW-5 SW-5 DR-SW-5-NS-3Q15 SW-6 15.3 --8.9 --12.1 -- 0.5 U --0.5 U --0.5 U -- 0.5 U --0.5 U --0.5 U -- -5.57 --7.27 --4.7 7.73 -19.9 --20.2 --22.7 29.9 -7.4 --7.2 --6.74 7.12 -9.38 --7.95 --3.91 46.47 -215.9 --194.1 --128 50.2 -111.8 --156.7 --143.8 157.8 Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 5 of 6 Constituent CAS RN Fraction Criteria Min (range only) 02B Class C Surface Water Criteria Unit Aluminum 7429-90-5 D --µg/L Aluminum 7429-90-5 T -87 µg/L Antimony 7440-36-0 D --µg/L Antimony 7440-36-0 T -640 µg/L Arsenic 7440-38-2 D -150 µg/L Arsenic 7440-38-2 T -10 µg/L Barium 7440-39-3 D --µg/L Barium 7440-39-3 T -200000 µg/L Beryllium 7440-41-7 D -6.5 µg/L Beryllium 7440-41-7 T --µg/L Boron 7440-42-8 D --µg/L Boron 7440-42-8 T --µg/L Cadmium 7440-43-9 D -0.15 µg/L Cadmium 7440-43-9 T --µg/L Calcium 7440-70-2 T --µg/L Chromium 7440-47-3 D -11 µg/L Chromium 7440-47-3 T --µg/L Cobalt 7440-48-4 D --µg/L Cobalt 7440-48-4 T -4 µg/L Copper 7440-50-8 D -2.7 µg/L Copper 7440-50-8 T --µg/L Iron 7439-89-6 D --µg/L Iron 7439-89-6 T --µg/L Lead 7439-92-1 D -0.54 µg/L Lead 7439-92-1 T --µg/L Magnesium 7439-95-4 T --µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T --µg/L Mercury 7439-97-6 T -0.012 µg/L Methane 74-82-8 N --µg/L Molybdenum 7439-98-7 D --µg/L Molybdenum 7439-98-7 T -2000 µg/L Nickel 7440-02-0 D -16 µg/L Nickel 7440-02-0 T --µg/L Potassium 7440-09-7 T --µg/L Selenium 7782-49-2 D --µg/L Selenium 7782-49-2 T -5 µg/L Sodium 7440-23-5 T --µg/L Strontium 7440-24-6 D --µg/L Strontium 7440-24-6 T -40000 µg/L Thallium 7440-28-0 D --µg/L Thallium 7440-28-0 T -0.47 µg/L Vanadium 7440-62-2 D --µg/L Vanadium 7440-62-2 T --µg/L Zinc 7440-66-6 D -36 µg/L Zinc 7440-66-6 T --µg/L Total Dissolved Solids TDS N --µg/L Total Organic Carbon TOC N --µg/L Total Suspended Solids TSS N --µg/L Alkalinity, CO3 ALK-CO3 N --µg/L Alkalinity, HCO3 ALK-HCO3 N --µg/L Alkalinity, lab ALK-LAB N --µg/L Chloride 16887-00-6 N -230000 µg/L Nitrite as N 14797-65-0 N --µg/L Nitrogen, NO2 plus NO3 NO2-NO3 N --µg/L Sulfate 14808-79-8 N --µg/L Sulfide 18496-25-8 N --µg/L Arsenic 7440-38-2 T -10 µg/L Chromium 7440-47-3 T --µg/L Iron 7439-89-6 T --µg/L Manganese 7439-96-5 D --µg/L Manganese 7439-96-5 T --µg/L As(III)7784-46-5 T --µg/L As(V)10103-60-3 T --µg/L Chromium (VI)18540-29-9 T --µg/L Fe(II)1345-25-1 T --µg/L Fe(III)1309-37-1 T --µg/L Mn(II)1344-43-0 T --µg/L Location: Event: Sample Date: Sample Type Code: Sample Name/ID: SW-6 SW-7 SW-7 SW-8 SW-8 SW-9 SW-9 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 9/10/2015 6/30/2015 9/10/2015 6/30/2015 9/10/2015 5/27/2015 9/11/2015 N N N N N N N DR-SW-6-NS-3Q15 SW-7 DR-SW-7-NS-3Q15 SW-8 DR-SW-8-NS-3Q15 SW-9 DR-SW-9-NS-3Q15 100 U -100 U -100 U 5 U 100 U 380 -550 -320 129 360 0.18 J 0.2 J 0.21 J 0.5 U 0.23 J 1 U 0.58 0.5 U 0.22 J 0.5 U 0.5 U 0.5 U 1 U 0.72 0.21 J 0.14 J 0.21 J 0.14 J 0.33 J 46.3 59 0.37 J 0.24 J 0.35 J 0.22 J 0.2 J 51.1 75.9 20 18 20 19 20 88 92 26 29 25 24 24 99 120 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1 U 0.11 J 220 130 190 170 130 360 380 240 130 180 180 160 364 400 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 1 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 1 U 0.08 U 8020 5910 7770 6340 7850 45400 51600 0.3 J+0.24 J 0.24 J+0.45 J 0.84 J+1 U 0.45 J 0.87 0.68 0.9 0.59 0.41 J 1 U 1 0.5 U 0.5 U 0.13 J 0.5 U 0.43 J 1 U 0.5 U 0.42 J 0.51 0.47 J 0.32 J 0.16 J 1 U 0.74 1.2 J+2 2.8 J+2.8 1.6 J+1 U 0.23 J 1.4 J+1.8 1.5 J+1.3 3 J+5.11 J+1.7 140 -41 J -29 J 10 U 50 U 1000 -1200 -800 140 550 0.26 J+0.088 J 0.21 J+0.061 J 0.62 J+1 U 0.1 U 0.73 0.97 0.77 0.64 0.2 J+1 U 0.83 3380 2480 3310 2580 3280 13500 14300 52 16 50 15 63 35 5 U 83 98 81 55 94 154 230 0.00194 J+0.00357 J+0.00201 J+0.00296 J+0.00187 J+0.000949 J+0.0011 J+ 17.4 J+9.6 J+11.7 J+16.3 J+35.5 J+10 UJ 16.4 0.63 0.41 J 0.62 0.43 J 0.59 7.62 9.4 0.65 0.26 J 0.56 0.26 J 0.72 7.65 9.8 0.35 J+0.58 0.33 J+1.6 0.59 J+1 U 0.7 0.58 J+0.6 0.64 J+0.47 J 0.48 J+1.16 1.6 2510 J 5000 U 2570 J 5000 U 2630 J 4690 5840 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1 U 0.36 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1 U 0.45 J 6230 4260 J 6900 3900 J 7550 17000 18700 57 41 54 43 53 883 1000 57 45 52 46 52 895 1100 0.1 U 0.1 U 0.1 U 0.1 U 0.018 J 0.2 U 0.017 J 0.022 J 0.1 U 0.025 J 0.1 U 0.1 U 0.2 U 0.035 J 1 0.85 J 0.96 J 0.69 J 2.6 0.701 1.1 3 3.1 3.1 2.5 1 0.947 2.7 10 UJ 10 U 13 J+10 U 13 J+18 J+10 U 10 U 20 J+10 U 4.6 J+5 J 10 16 71000 74000 63000 73000 J 68000 270000 290000 2400 3500 2600 5900 2400 2100 1600 16100 24500 17100 19200 13300 32000 35200 5000 U 5000 U 5000 U 5000 U 5000 U 10000 U 5000 U 22500 16800 24200 18300 23200 100000 114000 22500 16800 24200 18300 23200 100000 114000 13000 9400 12100 9800 11600 13000 14500 -----132 - 380 310 460 270 650 -210 J- 5000 5000 5300 5000 5300 90000 90300 100 U 100 U 100 U 100 U 100 U 100 U 100 U ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- Table 2-11 Surface Water Sample Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 6 of 6 Constituent CAS RN Fraction Criteria Min (range only) 02B Class C Surface Water Criteria Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Mn(IV)1313-13-9 T --µg/L Se(IV)10102-18-8 T --µg/L Se(VI)13410-01-0 T --µg/L Dissolved Oxygen DO N --mg/L Temperature TEMP N --Deg C pH PH N 6 9 SU Turbidity, field TURB N --NTU Specific Conductivity (field)SC N --µS/cm Oxidation Reduction Potential ORP N --mV Notes: µg/L = micrograms per liter µS/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 (a 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 SW-6 SW-7 SW-7 SW-8 SW-8 SW-9 SW-9 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 9/10/2015 6/30/2015 9/10/2015 6/30/2015 9/10/2015 5/27/2015 9/11/2015 N N N N N N N DR-SW-6-NS-3Q15 SW-7 DR-SW-7-NS-3Q15 SW-8 DR-SW-8-NS-3Q15 SW-9 DR-SW-9-NS-3Q15 ------- ------- ------- -7.68 7.95 6.79 5.8 -7.8 -24.6 25.6 23.7 25.4 -28.5 -7.12 7.3 6.97 6.9 -7.6 -46.71 35.29 33.08 24.02 -17.9 -49 120.1 50.2 123.1 -453.9 -199.9 157.3 203.7 193.8 -90.3 Table 2-12 Areas of Wetness Sampling Analytical Results - Rounds 1, 2, and 3 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 2 S-1 S-1 S-1 S-2 S-3 S-6 Round 1 Round 1 Round 2 Round 2 Round 2 Round 3 5/27/2015 6/26/2015 9/12/2015 9/14/2015 9/14/2015 11/24/2015 N N N N N N S-1 S-1 DR-S-1-NS-3Q15 DR-S-2-NS-3Q15 DR-S-3-NS-3Q15 DR-S-6-NS-4Q15-1 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D --µg/L 5 U -100 U 100 U 100 U 100 U Aluminum 7429-90-5 T --µg/L 3410 -4300 280 640 120 Antimony 7440-36-0 D --µg/L 1 U -0.34 J 0.5 U 0.25 J 0.5 U Antimony 7440-36-0 T -1 IMAC µg/L 1 U -0.45 J 0.5 U 0.26 J 0.5 U Arsenic 7440-38-2 D --µg/L 1 U -7.5 0.5 U 1.7 207 Arsenic 7440-38-2 T -10 02L µg/L 1.68 -14.1 0.16 J 2.3 204 J+ Barium 7440-39-3 D --µg/L 20 -50 40 55 50 Barium 7440-39-3 T -700 02L µg/L 54 -160 42 62 53 Beryllium 7440-41-7 D --µg/L 1 U -0.2 U 0.2 U 0.2 U 0.2 U Beryllium 7440-41-7 T -4 IMAC µg/L 1 U -1.1 0.2 U 0.2 U 0.2 U Boron 7440-42-8 D --µg/L 50 U -290 220 260 280 Boron 7440-42-8 T -700 02L µg/L 50 U -240 210 260 300 Cadmium 7440-43-9 D --µg/L 1 U -0.08 U 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T -2 02L µg/L 1 U -0.085 0.08 U 0.08 U 0.08 U Calcium 7440-70-2 T --µg/L 14400 -25200 J-16900 21000 29800 Chromium 7440-47-3 D --µg/L 1 U -0.22 J+0.21 J 0.39 J 0.25 J+ Chromium 7440-47-3 T -10 02L µg/L 3.86 -17.6 0.28 J 0.42 J 0.81 J+ Cobalt 7440-48-4 D --µg/L 1 U -3.1 J+0.37 J 1.1 0.7 Cobalt 7440-48-4 T -1 IMAC µg/L 4.88 -17.5 0.5 J 1.9 0.88 Copper 7440-50-8 D --µg/L 5.62 -1.4 J+1 U 1.4 1 U Copper 7440-50-8 T -1000 02L µg/L 6.15 J+-13.4 J+0.24 J 0.43 J 0.41 J Iron 7439-89-6 D --µg/L 18 -190 50 U 36 J 140 Iron 7439-89-6 T -300 02L µg/L 5720 -7700 390 970 330 Lead 7439-92-1 D --µg/L 1 U -0.16 J+0.052 J 0.11 0.051 J+ Lead 7439-92-1 T -15 02L µg/L 3.97 -16.2 0.28 0.71 0.25 Magnesium 7439-95-4 T --µg/L 4500 -8430 5260 5860 6690 Manganese 7439-96-5 D --µg/L 107 -640 87 350 1100 Manganese 7439-96-5 T -50 02L µg/L 829 -940 89 380 1100 Mercury 7439-97-6 T -1 02L µg/L 0.0005 UJ -0.00845 0.00154 0.00583 0.00231 J+ Methane 74-82-8 N --µg/L 10 UJ -219 16.6 14.3 161 J Molybdenum 7439-98-7 D --µg/L 1.25 -18.9 0.33 J 15.2 21.1 Molybdenum 7439-98-7 T --µg/L 1.57 -12.3 0.31 J 13.6 18.8 Nickel 7440-02-0 D --µg/L 1 U -1 J+0.36 J 0.81 0.64 Nickel 7440-02-0 T -100 02L µg/L 3.3 -10.6 J+0.39 J 0.86 0.91 J+ Potassium 7440-09-7 T --µg/L 1590 -4120 J 4800 J 5270 5820 Selenium 7782-49-2 D --µg/L 1 U -0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T -20 02L µg/L 1 U -2.1 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T --µg/L 9070 -16900 13800 15400 15100 Strontium 7440-24-6 D --µg/L 157 -330 240 300 460 Strontium 7440-24-6 T --µg/L 166 -380 240 300 470 Thallium 7440-28-0 D --µg/L 0.2 U -0.1 U 0.022 J 0.1 U 0.1 U Thallium 7440-28-0 T -0.2 IMAC µg/L 0.2 U -0.16 0.031 J 0.044 J 0.028 J+ Vanadium 7440-62-2 D --µg/L 0.3 U -1.6 1 U 0.3 J 0.35 J Vanadium 7440-62-2 T -0.3 IMAC µg/L 8.06 -41.8 0.52 J 1.7 0.89 J Zinc 7440-66-6 D --µg/L 11 J+-13 J+6.7 J 10 10 U Zinc 7440-66-6 T -1000 02L µg/L 17 -26 6.6 J 10 U 10 U Total Dissolved Solids TDS N -500000 02L µg/L 99000 -154000 128000 127000 158000 Total Organic Carbon TOC N --µg/L 2100 -6700 900 J 650 J 670 J+ Total Suspended Solids TSS N --µg/L 180000 -4360000 3700 44000 24700 Alkalinity, CO3 ALK-CO3 N --µg/L 10000 U -5000 UJ 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N --µg/L 51000 -72500 39300 56700 107000 Alkalinity, lab ALK-LAB N --µg/L 51000 -72500 39300 J-56700 J-107000 Chloride 16887-00-6 N -250000 02L µg/L 10000 -11800 11700 11700 10700 Nitrite as N 14797-65-0 N -1000 02L µg/L 117 ----- Nitrogen, NO2 plus NO3 NO2-NO3 N --µg/L --20 U 28 34 140 Sulfate 14808-79-8 N -250000 02L µg/L 9400 -32600 34600 29100 18100 Sulfide 18496-25-8 N --µg/L 200 U -100 U 100 U 100 U 100 U Arsenic 7440-38-2 T -10 02L µg/L ---0.275 J 1.17 J-214 Chromium 7440-47-3 T -10 02L µg/L ---0.56 J 1.36 J 1.32 Iron 7439-89-6 T -300 02L µg/L ---212 J 237 J 1520 J Manganese 7439-96-5 D --µg/L ---83.3 J 381 J 1120 Manganese 7439-96-5 T -50 02L µg/L ---77.4 J 380 J 2100 J As(III)7784-46-5 T --µg/L -0.402 -0.156 J 0.889 146 As(V)10103-60-3 T --µg/L -0.195 -0.5 U 0.279 J 67.5 Chromium (VI)18540-29-9 T -0.07 DHHS µg/L -0.022 J+-0.011 J 0.0092 J 0.016 J- Fe(II)1345-25-1 T --µg/L -20 U -32.5 J 27.8 J 166 J Fe(III)1309-37-1 T --µg/L -29.9 ---- Mn(II)1344-43-0 T --µg/L -229 ---- Mn(IV)1313-13-9 T --µg/L -1 UJ ---- Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Table 2-12 Areas of Wetness Sampling Analytical Results - Rounds 1, 2, and 3 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 2 S-1 S-1 S-1 S-2 S-3 S-6 Round 1 Round 1 Round 2 Round 2 Round 2 Round 3 5/27/2015 6/26/2015 9/12/2015 9/14/2015 9/14/2015 11/24/2015 N N N N N N S-1 S-1 DR-S-1-NS-3Q15 DR-S-2-NS-3Q15 DR-S-3-NS-3Q15 DR-S-6-NS-4Q15-1 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Location: Event: Sample Date: Sample Type Code: Sample Name/ID: Se(IV)10102-18-8 T --µg/L -0.5 U -2 U 2 U 2 U Se(VI)13410-01-0 T --µg/L -0.5 U -2 U 2 U 2 U Dissolved Oxygen DO N --mg/L -7.02 2.3 4.71 7.02 - Temperature TEMP N --Deg C -24.9 17.1 17.3 17.1 - pH PH N 6.5 8.5 02L SU -7.65 7.5 6.89 7.1 - Turbidity, field TURB N --NTU -5.17 -19.74 45.89 - Specific Conductivity (field)SC N --µS/cm -173.8 255.7 180.1 207.8 - Oxidation Reduction Potential ORP N --mV -208.6 127.9 112 139.3 - Notes: µg/L = micrograms per liter µS/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 Ta b l e 2 - 1 3 N C D E Q S a m p l e L o c a t i o n A n a l y t i c a l R e s u l t s - R o u n d 1 a n d R o u n d 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin CC S W 0 0 1 CC S W 0 0 1 CCSW002OUT DRRC001 DRRC001 Ro u n d 1 Ro u n d 1 Round 2 Round 1 Round 2 7/ 1 / 2 0 1 5 7/ 1 / 2 0 1 5 9/14/2015 7/1/2015 9/14/2015 F DN N N N CC S W 0 0 1 - D U P CC S W 0 0 1 D R - C C S W 0 0 2 O U T - N S - 3 Q 1 5 D R R C 0 0 1 DR-DRRC001-NS-3Q15 Co n s t i t u e n t CA S R N F r a c t i o n S W Q S C r i t e r i a N C D E Q 0 2 B G W Q S C r i t e r i a N C D E Q 0 2 L U n i t Al u m i n u m 7 4 2 9 - 9 0 - 5 D - - - - µ g / L - - 1 0 0 U - 1 0 0 U Al u m i n u m 7 4 2 9 - 9 0 - 5 T - 87 - - µ g / L - - 3500 -2300 An t i m o n y 7 4 4 0 - 3 6 - 0 D - - - - µ g / L - 0 . 3 J 0 . 5 U 0 . 5 U 0 . 5 U An t i m o n y 7 4 4 0 - 3 6 - 0 T - 6 4 0 - 1 µ g / L - 0 . 2 4 J 0 . 5 U 0 . 5 U 0 . 5 U Ar s e n i c 7 4 4 0 - 3 8 - 2 D - 1 5 0 - - µ g / L - 0 . 4 2 J 0 . 1 6 J 0 . 3 2 J 0 . 3 8 J Ar s e n i c 7 4 4 0 - 3 8 - 2 T - 1 0 - 1 0 µ g / L - 0 . 3 5 J 0 . 5 8 0 . 3 5 J 1 . 9 Ba r i u m 7 4 4 0 - 3 9 - 3 D - - - - µ g / L - 2 7 7 2 5 0 4 6 Ba r i u m 7 4 4 0 - 3 9 - 3 T - 2 0 0 0 0 0 - 7 0 0 µ g / L - 3 3 1 2 0 5 3 8 6 Be r y l l i u m 7 4 4 0 - 4 1 - 7 D - 6 . 5 - - µ g / L - 0 . 2 U 0 . 2 U 0 . 2 U 0 . 2 U Be r y l l i u m 7 4 4 0 - 4 1 - 7 T - - - 4 µ g / L - 0 . 2 U 0 . 2 1 0 . 2 U 0 . 2 5 Bo r o n 7 4 4 0 - 4 2 - 8 D - - - - µ g / L - 5 0 U 3 9 J 1 3 0 1 6 0 Bo r o n 7 4 4 0 - 4 2 - 8 T - - - 7 0 0 µ g / L - 2 8 J + 3 8 J 1 3 0 J + 1 6 0 Ca d m i u m 7 4 4 0 - 4 3 - 9 D - 0 . 1 5 - - µ g / L - 0 . 0 8 U 0 . 0 8 U 0 . 0 8 U 0 . 0 8 U Ca d m i u m 7 4 4 0 - 4 3 - 9 T - - - 2 µ g / L - 0 . 0 8 U 0 . 0 8 U 0 . 0 8 U 0 . 0 5 J Ca l c i u m 7 4 4 0 - 7 0 - 2 T - - - - µ g / L - 1 4 7 0 0 3 0 8 0 0 1 9 0 0 0 1 9 8 0 0 Ch r o m i u m 7 4 4 0 - 4 7 - 3 D - 1 1 - - µ g / L - 0 . 4 4 J 0 . 3 3 J 0 . 3 2 J 0 . 2 J Ch r o m i u m 7 4 4 0 - 4 7 - 3 T - - - 1 0 µ g / L - 0 . 2 2 J 2 0 . 2 5 J 0 . 9 3 Co b a l t 7 4 4 0 - 4 8 - 4 D - - - - µ g / L - 0 . 3 2 J 0 . 3 1 J 1 . 4 0 . 6 3 Co b a l t 7 4 4 0 - 4 8 - 4 T - 4 - 1 µg / L - 0. 3 4 J 4.6 1.5 3.6 Co p p e r 74 4 0 - 5 0 - 8 D - 2. 7 - - µ g / L - 0. 8 8 J 7.5 0.45 J 7.3 Co p p e r 74 4 0 - 5 0 - 8 T - - - 10 0 0 µ g / L - 0. 9 5 J 3.8 0.49 J 2.4 Ir o n 74 3 9 - 8 9 - 6 D - - - - µ g / L - - 50 U -100 Ir o n 74 3 9 - 8 9 - 6 T - - - 30 0 µg / L - - 5200 -9900 Le a d 74 3 9 - 9 2 - 1 D - 0. 5 4 - - µ g / L - 0. 1 2 0.78 0.1 U 0.76 Le a d 74 3 9 - 9 2 - 1 T - - - 15 µ g / L - 0. 0 9 J 1.6 0.092 J 2.5 Ma g n e s i u m 74 3 9 - 9 5 - 4 T - - - - µ g / L - 22 1 0 1 1 7 0 0 1 2 2 0 0 1 3 3 0 0 Ma n g a n e s e 74 3 9 - 9 6 - 5 D - - - - µ g / L - 83 2 5 0 2 1 0 0 1 0 0 0 Ma n g a n e s e 74 3 9 - 9 6 - 5 T - - - 50 µg / L - 16 0 1400 2200 1500 Me r c u r y 74 3 9 - 9 7 - 6 T - 0. 0 1 2 - 1 µ g / L - 0. 0 0 0 6 2 3 0 . 0 1 1 0 . 0 0 0 6 8 4 0.0425 Me t h a n e 74 - 8 2 - 8 N - - - - µ g / L - 8 J + 2.6 J+23.7 30.5 Mo l y b d e n u m 74 3 9 - 9 8 - 7 D - - - - µ g / L - 1. 5 0.47 J 0.36 J 0.33 J Mo l y b d e n u m 74 3 9 - 9 8 - 7 T - 20 0 0 - - µ g / L - 1. 4 0.5 U 0.37 J 0.15 J Ni c k e l 74 4 0 - 0 2 - 0 D - 16 - - µ g / L - 0. 5 4 1 1 . 7 1 . 3 Ni c k e l 74 4 0 - 0 2 - 0 T - - - 10 0 µ g / L - 0. 7 3 . 7 1 . 9 2 . 6 Po t a s s i u m 74 4 0 - 0 9 - 7 T - - - - µ g / L - 47 5 0 J 12200 5000 U 5000 U Se l e n i u m 77 8 2 - 4 9 - 2 D - - - - µ g / L - 0. 8 5 0.5 U 0.5 U 0.5 U Se l e n i u m 77 8 2 - 4 9 - 2 T - 5 - 20 µ g / L - 0. 5 U 0.5 U 0.5 U 0.5 U So d i u m 74 4 0 - 2 3 - 5 T - - - - µ g / L - 11 1 0 0 1 2 2 0 0 1 9 4 0 0 2 1 0 0 0 St r o n t i u m 74 4 0 - 2 4 - 6 D - - - - µ g / L - 65 1 6 0 2 4 0 2 3 0 St r o n t i u m 74 4 0 - 2 4 - 6 T - 40 0 0 0 - - µ g / L - 68 1 7 0 2 5 0 2 7 0 Th a l l i u m 74 4 0 - 2 8 - 0 D - - - - µ g / L - 0. 0 9 1 J 0.1 U 0.1 U 0.1 U Th a l l i u m 74 4 0 - 2 8 - 0 T - 0. 4 7 - 0. 2 µ g / L - 0. 0 2 5 J 0.1 U 0.036 J 0.026 J Va n a d i u m 74 4 0 - 6 2 - 2 D - - - - µ g / L - 0. 5 6 J 0.49 J 1 U 1 U Va n a d i u m 74 4 0 - 6 2 - 2 T - - - 0. 3 µg / L - 0. 5 5 J 3.3 0.29 J 2.6 Zi n c 74 4 0 - 6 6 - 6 D - 36 - - µ g / L - 10 U 5.3 J 6.8 J 5 J Zi n c 74 4 0 - 6 6 - 6 T - - - 10 0 0 µ g / L - 10 U 33 5 J 36 To t a l D i s s o l v e d S o l i d s TD S N - - - 50 0 0 0 0 µ g / L - 11 2 0 0 0 177000 186000 185000 To t a l O r g a n i c C a r b o n TO C N - - - - µ g / L - 60 0 0 2500 12500 2700 To t a l S u s p e n d e d S o l i d s TS S N - - - - µ g / L - 42 0 0 U 183000 2500 U 363000 Al k a l i n i t y , C O 3 AL K - C O 3 N - - - - µ g / L - 50 0 0 U 5000 U 5000 U 5000 UJ Al k a l i n i t y , H C O 3 AL K - H C O 3 N - - - - µ g / L - 22 3 0 0 117000 70900 82000 Al k a l i n i t y , l a b AL K - L A B N - - - - µ g / L - 22 3 0 0 117000 70900 82000 Ch l o r i d e 16 8 8 7 - 0 0 - 6 N - 23 0 0 0 0 - 25 0 0 0 0 µ g / L - 16 4 0 0 7 0 0 0 1 2 6 0 0 1 4 0 0 0 Ni t r o g e n , N O 2 p l u s N O 3 N O 2 - N O 3 N - - - - µ g / L - 22 300 170 110 Su l f a t e 14 8 0 8 - 7 9 - 8 N - - - 25 0 0 0 0 µ g / L - 22 9 0 0 1 5 4 0 0 3 8 4 0 0 4 6 0 0 0 Su l f i d e 18 4 9 6 - 2 5 - 8 N - - - - µ g / L - 10 0 U 100 U 100 U 100 U Ar s e n i c 74 4 0 - 3 8 - 2 T - 10 - 10 µ g / L - - 0.5 U -0.203 J Ch r o m i u m 74 4 0 - 4 7 - 3 T - - - 10 µ g / L - - 1.54 J+-1.54 J+ Lo c a t i o n : Ev e n t : Sa m p l e D a t e : Sa m p l e T y p e C o d e : Sa m p l e N a m e / I D : Page 1 of 2 Ta b l e 2 - 1 3 N C D E Q S a m p l e L o c a t i o n A n a l y t i c a l R e s u l t s - R o u n d 1 a n d R o u n d 2 Corrective Action Plan Part 2 Dan River Steam Station Ash Basin CC S W 0 0 1 CC S W 0 0 1 CCSW002OUT DRRC001 DRRC001 Ro u n d 1 Ro u n d 1 Round 2 Round 1 Round 2 7/ 1 / 2 0 1 5 7/ 1 / 2 0 1 5 9/14/2015 7/1/2015 9/14/2015 F DN N N N CC S W 0 0 1 - D U P CC S W 0 0 1 D R - C C S W 0 0 2 O U T - N S - 3 Q 1 5 D R R C 0 0 1 DR-DRRC001-NS-3Q15 Co n s t i t u e n t CA S R N F r a c t i o n S W Q S C r i t e r i a N C D E Q 0 2 B G W Q S C r i t e r i a N C D E Q 0 2 L U n i t Lo c a t i o n : Ev e n t : Sa m p l e D a t e : Sa m p l e T y p e C o d e : Sa m p l e N a m e / I D : Ir o n 74 3 9 - 8 9 - 6 T - - - 30 0 µg / L - - 266 J+-2210 J Ma n g a n e s e 74 3 9 - 9 6 - 5 D - - - - µ g / L - - 249 J -1100 J Ma n g a n e s e 74 3 9 - 9 6 - 5 T - - - 50 µg / L - - 417 J -1220 J As ( I I I ) 77 8 4 - 4 6 - 5 T - - - - µ g / L 0. 2 U 0. 2 U 0.5 U 0.24 0.325 J+ As ( V ) 10 1 0 3 - 6 0 - 3 T - - - - µ g / L 0. 2 U 0. 2 U 0.5 U 0.2 U 0.5 U Ch r o m i u m ( V I ) 18 5 4 0 - 2 9 - 9 T - - - 0. 0 7 µg / L 0. 0 4 1 0 . 0 5 6 0.14 0.05 UJ 0.0093 J Fe ( I I ) 13 4 5 - 2 5 - 1 T - - - - µ g / L 23 J 7 J 30 UJ 213 25.5 J+ Fe ( I I I ) 13 0 9 - 3 7 - 1 T - - - - µ g / L 74 . 9 J 10 3 J -253 - Mn ( I I ) 13 4 4 - 4 3 - 0 T - - - - µ g / L 62 . 9 7 1 . 1 - 2470 - Mn ( I V ) 13 1 3 - 1 3 - 9 T - - - - µ g / L 62 . 1 J 49 . 5 J -0.74 - Se ( I V ) 10 1 0 2 - 1 8 - 8 T - - - - µ g / L 0. 5 U 0. 5 U 2 U 0.5 U 2 U Se ( V I ) 13 4 1 0 - 0 1 - 0 T - - - - µ g / L 0. 5 U 0. 5 U 2 U 0.5 U 2 U Di s s o l v e d O x y g e n DO N - - - - m g / L - 4. 6 5 7.4 3.89 5.12 Te m p e r a t u r e TE M P N - - - - D e g C - 29 . 7 18.5 23 18.6 pH PH N 6 9 6. 5 8. 5 S U - 8. 0 5 7 . 5 7 . 2 7 . 4 Tu r b i d i t y , f i e l d TU R B N - - - - N T U - 5. 4 7 130.2 4.21 115.6 Sp e c i f i c C o n d u c t i v i t y ( f i e l d ) S C N - - - - µ S / c m - 17 0 . 3 269.9 287 257.1 Ox i d a t i o n R e d u c t i o n P o t e n t i a l O R P N - - - - m V - 20 0 . 3 101.5 102.3 -92.8 No t e s : µg / L = m i c r o g r a m s p e r l i t e r µS / c m = m i c r o s i e m e n s p e r c e n t i m e t e r ft = f e e t mV = m i l l i v o l t s NT U - n e p h e l o m e t r i c t u r b i d i t y u n i t s pC i / L = p i c o c u r i e s p e r l i t e r SU = s t a n d a r d u n i t J = l a b o r a t o r y e s t i m a t e d c o n c e n t r a t i o n J- = e s t i m a t e d c o n c e n t r a t i o n , b i a s e d l o w J+ = e s t i m a t e d c o n c e n t r a t i o n , b i a s e d h i g h U = r e s u l t s n o t d e t e c t e d a t c o n c e n t r a t i o n s w h i c h e q u a l t h e l a b o r a t o r y ' s m e t h o d r e p o r t i n g l i m i t 02 B = N o r t h C a r o l i n a s u r f a c e w a t e r s t a n d a r d s a s s p e c i f i e d i n T 1 5 N C A C 0 2 B . 0 2 1 1 a n d . 0 2 1 6 ( a m e n d e d e f f e c t i v e J a n u a r y 2 0 1 5 ) 02 L = N o r t h C a r o l i n a g r o u n d w a t e r s t a n d a r d s a s s p e c i f i e d i n T 1 5 A N C A C 0 2 L D = d i s s o l v e d De g C = d e g r e e C e l s i u s DH H S = N o r t h C a r o l i n a D e p a r t m e n t o f H e a l t h a n d H u m a n S e r v i c e s DO = d i s s o l v e d o x y g e n GW = g r o u n d w a t e r GW Q S = g r o u n d w a t e r q u a l i t y s t a n d a r d IM A C = I n t e r i m M a x i m u m A l l o w C o n c e n t r a t i o n N = n o r m a l NS = n o s t a n d a r d T = t o t a l TD S = t o t a l d i s s o l v e d s o l i d s TO C = t o t a l o r g a n i c c a r b o n Page 2 of 2 Table 9-1 Interim Monitoring Plan Sample Locations Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 2 Well ID / Sampling Location Well Type Well Screen Length (ft) Approximate Well Total Depth (ft. bgs) Top of screen (ft. bgs) Bottom of screen (ft. bgs) AB-5S CSA 15 23 7 22 AB-5D CSA 5 45 34 39 AB-10D CSA 5 83 77 82 AB-10S CSA 15 30.5 15 30 AB-10SL CSA 5 50 43 48 AB-25BR CSA 5 149 144 149 AB-25D CSA 5 94 82 87 AB-25S CSA 15 53.5 30 45 AB-30BR CSA 5 115 109 114 AB-30D CSA 5 63 54 59 AB-30S CSA 15 31 15 30 AB-35BR CSA 5 95 81 86 AS-2D CSA 5 66 53 58 AS-4D CSA 5 42 35 40 AS-6D CSA 5 62 56 61 AS-8BR CSA 5 111 64 69 AS-8D CSA 4 61 48 52 AS-10D CSA 5 83 38 43 AS-12S CSA 10 28.9 13.9 23.9 BG-1D Background/CSA 5 22 9 14 BG-5D Background/CSA 5 39.6 28 33 BG-5S Background/CSA 10 23 10.5 20.5 GWA-1D CSA 5 120 114 119 GWA-1S CSA 15 47 30 45 GWA-2D CSA 5 69 56 61 GWA-2S CSA 15 31.5 16 31 GWA-3D CSA 5 41.6 34 39 GWA-3S CSA 10 29 13.8 23.8 GWA-4D CSA 5 56 43 48 GWA-4S CSA 15 37 20 35 GWA-5BR CSA 5 63.3 55 60 GWA-6D CSA 5 43.6 29 34 GWA-6S CSA 10 20 9 19 GWA-7D CSA 5 56 46 51 GWA-7S CSA 15 37.5 14 29 GWA-8D CSA 5 45 35 40 GWA-8S CSA 15 23 6 21 GWA-9D Background - CSA 5 74 67 72 GWA-9S Background - CSA 15 49 32 47 GWA-10D CSA 5 45 33 38 GWA-10S CSA 15 28 13 28 GWA-11D CSA 5 41.7 29.5 34.5 GWA-11S CSA 15 26 10 25 GWA-12S CSA/Background 10 16 6 16 GWA-12D CSA/Background 5 32 27 32 GWA-14D CSA 5 24 11.5 16.5 GWA-14S CSA 5 9 3 8 GWA-15D CSA 5 34.05 26 31 GWA-15S CSA 5 13.5 7.5 12.5 MW-9 Voluntary 10 22.6 11.94 21.94 MW-9D Voluntary 5 72 66.05 71.05 MW-10 Voluntary 10 21 10.8 20.8 MW-10D Voluntary 5 73 67.55 72.55 MW-11 Voluntary 10 24 14.39 24.39 MW-11D Voluntary 5 56 50.82 55.82 MW-12 Voluntary 10 37 27.12 37.12 MW-12D Voluntary 5 45 39.97 44.97 MW-20D Compliance 5 44.2 39.2 44.2 MW-20S Compliance 15 22.11 7.11 22.11 MW-21D Compliance 5 21 16.4 21.4 MW-21S Compliance 5 12 6.56 11.56 MW-22D Compliance 5 39.11 34.11 39.11 MW-22S Compliance 10 24.86 14.86 24.86 MW-22BR CSA 5 84.9 58 63 MW-23D Background/Compliance 10 20.11 10.11 20.11 MW-23BR Background/CSA 5 61 56 61 MW-301BR CSA 5 82.5 37 42 MW-308BR CSA 5 88 77 82 MW-310BR CSA 5 88 73 78 MW-311BR CSA 5 133.5 120 125 MW-314BR CSA 5 99.1 69 74 MW-315BR CSA 15 104.3 59.7 74.7 MW-317BR CSA 5 109.8 83 88 MW-318D CSA 5 50 44.5 49.5 OW-303D Closure 5 88 83 88 OW-308D Closure 10 15 5 15 OW-310D Closure 5 24 19 24 GROUNDWATER Table 9-1 Interim Monitoring Plan Sample Locations Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 2 of 2 Well ID / Sampling Location Well Type Well Screen Length (ft) Approximate Well Total Depth (ft. bgs) Top of screen (ft. bgs) Bottom of screen (ft. bgs) SW-1 SW NA NA NA NA SW-2 SW NA NA NA NA SW-3 SW NA NA NA NA SW-4 SW NA NA NA NA SW-5 SW NA NA NA NA SW-6 SW NA NA NA NA SW-7 SW NA NA NA NA SW-8 SW NA NA NA NA SW-9 SW NA NA NA NA SW-10 SW NA NA NA NA SW-11 SW NA NA NA NA SW-12 SW NA NA NA NA SW-13 SW NA NA NA NA S-1 SP NA NA NA NA S-2 SP NA NA NA NA S-3 SP NA NA NA NA S-4 SP NA NA NA NA S-6 SP NA NA NA NA AREAS OF WETNESS SURFACE WATER Table 9-2 Sampling Parameters and Analytical Methods Corrective Action Plan Part 2 Dan River Steam Station Ash Basin Page 1 of 1 Analytical Method Chemical Analyte Bottle Requirement Preservative EPA 200.7 Total/Dissolved Metals - Alluminum, Barium, Boron, Calcium (total only), Iron, Lead, Magnesium, Manganese, Potassium (total only), Sodium (total only), Strontium, Zinc 2 - 250 mL HDPE Nitric Acid, Ice EPA 200.8 Dissolved Metals - Antimony, Arsenic, Beryllium, Cadmium, Chromium, Cobalt, Copper, Lead, Molybdenum, Nickel, Selenium, Thallium, Vanadium 2 - 250 mL HDPE Nitric Acid, Ice EPA 245.1 Total/Dissolved Mercury 2 - 250 mL HDPE Nitric Acid, Ice EPA 300 Chloride/Sulfate 250 mL PET Ice EPA 350.1 Ammonia 250 mL PET Sulfuric Acid, Ice EPA 353.2 Nitrate/Nitrite 125 mL PET Sulfuric Acid, Ice RSK 175 Methane 2-20 mL VOA Ice SM 2540C/D TDS/TSS 2 - 1,000 mL PET Ice SM 4500 - S2D Sulfide 125 mL PET Zinc Acetate plus Sodium Hydroxide, Ice SM 5310B TOC 3 - 40 mL glass VOA Phosphoric Acid, Ice SM2320B Alkalinity 500 mL PET Ice EPA 903.1 Modified Radium 226 1 L PET Nitric Acid, Ice EPA 904.0/SW846 9320 Modified Radium 228 1 L PET Nitric Acid, Ice SW846 6020A Total Combined Uranium 250 mL PET Nitric Acid, Ice EPA 218.7 Hexavalent Chromium 125 mL PET Sodium Hydroxide, Ice