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BCSS CAP Part 2_Tables_FINAL_20160307This page intentionally left blank Corrective Action Plan Part 2 Table 2-1 Summary of Horizontal Hydraulic Gradient Calculations Belews Creek Steam Station Ash Basin Well Pair Groundwater Elevation Upgradient Well Groundwater Elevation Downgradient Well Flow Path Horizontal Hydraulic Gradient (h2, ft) (h 1, ft) (dl,ft) (l, Wft) Surficial Aquifer (S wells) GWA-8S/MW-200S 802.66 630.86 5923.64 0.029 AB-7S/AB-5S 758.64 755.78 1054.51 0.003 GWA-5S/MW-103S 760.15 676.89 3314.24 0.025 GWA-9S/GWA-11S 751.07 725.02 4154.35 0.006 GWA-5S/MW-200S 760.15 630.86 3981.80 0.032 Average Horizontal Hydraulic Gradient, S Wells: 0.019 Transition Zone (Dwells) GWA-8D/MW-200D 799.59 629.78 5907.17 0.029 AB-9D/AB-5D 758.50 755.69 1356.81 0.002 GWA-7D/AB-6D 784.90 758.73 2001.03 0.013 GWA-9D/GWA-11D 749.57 721.79 4163.49 0.007 GWA-5D/MW-200D 759.37 629.78 3965.92 0.033 BG-1D/MW-200D 757.47 629.78 3970.24 0.032 GWA-12D/MW-202D* 780.06 740.72 886.79 0.044 Average Horizontal Hydraulic Gradient, D Wells: 0.019 Fractured Bedrock (BR wells) Insufficient data to calculate hydraulic gradients Notes: * Not used for average hydraulic gradient calculation 1. Groundwater elevations measured to nearest 0.01 ft. with depth -to -water electrode 2. Groundwater elevations measured on September 28, 2015 by Pace Analytical 3. All elevations are referenced to North American Vertical Datum of 1988 (NAVD88) 4. Horizontal hydraulic gradient, i = dh/dl Page 1 of 1 This page intentionally left blank Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location AB-21) Sample Location AB-2S Sample Location AB-4BR Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 57 J ND/NA 2300 2300 0 670 600 -11.02 Antimony 7440-36-0 D pg/L 0.22 J 0.23 J 4.44 2.9 ND/NA 1.9 1.7 -11.11 Arsenic 7440-38-2 D pg/L 2 2 0 5.6 ND/NA 0.44 J 0.48 J 8.7 Barium 7440-39-3 D pg/L 96 90 -6.45 7 6.7 -4.38 12 11 -8.7 Beryllium 7440-41-7 D pg/L 0.44 0.45 2.25 0.2 U ND/NA 0.2 U 0.2 U ND/NA Boron 7440-42-8 D pg/L 12300 11000 -11.16 170 160 -6.06 41 J 25 J -48.48 Cadmium 7440-43-9 D pg/L 0.026 J 0.08 U ND/NA 0.08 U ND/NA 0.08 U 0.08 U ND/NA Chromium 7440-47-3 D pg/L 0.38 J 0.46 J 19.05 17.3 ND/NA 1.3 1.1 -16.67 Cobalt 7440-48-4 D pg/L 91.6 89.6 -2.21 0.15 J ND/NA 0.5 U 0.5 U ND/NA Copper 7440-50-8 D pg/L 1 U 1 U ND/NA 2.5 ND/NA 3.2 0.76 J -123.23 Iron 7439-89-6 D pg/L 1400 1300 -7.41 50 U 50 U ND/NA 50 U 50 U ND/NA Lead 7439-92-1 D pg/L 0.1 U 0.1 U ND/NA 0.1 U ND/NA 0.42 0.1 U ND/NA Manganese 7439-96-5 D pg/L 14400 13000 -10.22 5 U 5 U ND/NA 5 U 5 U ND/NA Mercury 7439-97-6 D pg/L 0.2 UJ 0.2 UJ ND/NA 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA Molybdenum 7439-98-7 D pg/L 0.39 J 0.39 J 0 14.6 ND/NA 7.9 7.1 -10.67 Nickel 7440-02-0 D pg/L 26.2 26.2 0 0.75 ND/NA 0.58 0.45 J -25.24 Selenium 7782-49-2 D pg/L 0.9 0.88 -2.25 0.95 ND/NA 0.27 J 0.26 J -3.77 Strontium 7440-24-6 D pg/L 900 860 -4.55 53 52 -1.9 130 130 0 Thallium 7440-28-0 D pg/L 0.4 0.4 0 0.017 J ND/NA 0.1 U 0.027 J ND/NA Vanadium 7440-62-2 D pg/L 1 U 1 U ND/NA 40 ND/NA 3.6 3.4 -5.71 Zinc 7440-66-6 1 D pg/L 1 41 36 -12.99 10 U 10 U ND/NA 10 U 10 U ND/NA Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 1 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location AB-41D Sample Location AB-51D Sample Location AB-61D Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA 50 J 100 U ND/NA 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.18 J 0.17 J -5.71 0.4 J 0.42 J 4.88 0.5 U 0.5 U ND/NA Arsenic 7440-38-2 D pg/L 2.5 2.4 -4.08 4.8 4.7 -2.11 0.5 U 0.5 U ND/NA Barium 7440-39-3 D pg/L 20 20 0 22 21 -4.65 20 20 0 Beryllium 7440-41-7 D pg/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 pg/L 110 100 -9.52 50 U 31 J ND/NA 50 U 50 U ND/NA Cadmium 7440-43-9 D pg/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 pg/L 0.41 J 0.5 19.78 0.36 J 0.76 71.43 0.55 0.38 J -36.56 Cobalt 7440-48-4 D pg/L 0.22 J 0.22 J 0 0.34 J 0.31 J -9.23 0.5 U 0.5 U ND/NA Copper 7440-50-8 D pg/L 1 U 0.52 J ND/NA 0.24 J 0.3 J 22.22 1 U 1 U ND/NA Iron 7439-89-6 D pg/L 88 84 -4.65 120 110 -8.7 50 U 50 U ND/NA Lead 7439-92-1 D pg/L 0.1 U 0.14 ND/NA 0.052 J 0.1 U ND/NA 0.1 U 0.1 U ND/NA Manganese 7439-96-5 D pg/L 140 140 0 120 120 0 27 32 16.95 Mercury 7439-97-6 D pg/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 Molybdenum 7439-98-7 D pg/L 5.2 4.9 -5.94 6.2 6 -3.28 1.5 1.5 0 Nickel 7440-02-0 D pg/L 0.35 J 0.44 J 22.78 1.1 1.2 8.7 0.76 0.65 -15.6 Selenium 7782-49-2 D pg/L 0.33 J 0.47 J 35 0.41 J 0.27 J -41.18 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 120 120 0 69 69 0 57 59 3.45 Thallium 7440-28-0 D pg/L 0.016 J 0.1 U ND/NA 0.03 J 0.031 J 3.28 0.1 U 0.1 U ND/NA Vanadium 7440-62-2 D pg/L 3.4 3.4 0 3.5 3.3 -5.88 2.8 2.7 -3.64 Zinc 1 7440-66-6 1 D pg/L 1 8.9 J 14 44.54 1 8.1 J 6.6 J -20.41 7 J 4.5 J 43.48 Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 2 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location AMID Sample Location AB-96R Sample Location AB-91D Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 63 J 100 U ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.5 U 0.5 U ND/NA 0.19 J 0.23 J 19.05 0.18 J 0.22 J 20 Arsenic 7440-38-2 D pg/L 1.9 2 5.13 13.8 17.3 22.51 2.3 2.2 -4.44 Barium 7440-39-3 D pg/L 8.8 8.6 -2.3 8.5 9.7 13.19 6.5 6.9 5.97 Beryllium 7440-41-7 D pg/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 pg/L 46 J 50 U ND/NA 50 U 57 ND/NA 72 66 -8.7 Cadmium 7440-43-9 D pg/L 0.08 U 0.035 J ND/NA 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA Chromium 7440-47-3 D pg/L 0.5 U 0.28 J ND/NA 0.26 J 0.66 86.96 0.25 J 0.38 J 41.27 Cobalt 7440-48-4 D pg/L 1.1 1.2 8.7 0.67 0.9 29.3 0.25 J 0.33 J 27.59 Copper 7440-50-8 D pg/L 0.65 J 1 U ND/NA 1 U 1 U ND/NA 0.25 J 1 U ND/NA Iron 7439-89-6 D pg/L 190 170 -11.11 26 J 370 173.74 390 450 14.29 Lead 7439-92-1 D pg/L 0.071 J 0.097 J 30.95 0.046 J 0.1 U ND/NA 0.13 0.064 J -68.04 Manganese 7439-96-5 D pg/L 100 96 -4.08 660 750 12.77 180 180 0 Mercury 7439-97-6 D pg/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 Molybdenum 7439-98-7 D pg/L 0.84 0.82 -2.41 3.1 4.1 27.78 6.9 6.3 -9.09 Nickel 7440-02-0 D pg/L 3.9 4.1 5 0.48 J 0.83 53.44 0.64 0.72 11.76 Selenium 7782-49-2 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 64 63 -1.57 110 120 8.7 110 110 0 Thallium 7440-28-0 D pg/L 0.02 J 0.021 J 4.88 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA Vanadium 7440-62-2 D pg/L 1 U 1 U ND/NA 1 U 1 U ND/NA 1 U 0.39 J ND/NA Zinc 1 7440-66-6 1 D pg/L 1 2.8 J 17.5 J 91.26 10 U 10 U ND/NA 10 U 1 10 U ND/NA Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 3 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location AB-9S Sample Location GWA-12BR Sample Location GWA-12D Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.5 U 0.5 U ND/NA 0.78 0.79 1.27 0.5 U 0.5 U ND/NA Arsenic 7440-38-2 D pg/L 0.5 U 0.5 U ND/NA 1.1 1.1 0 0.5 U 0.5 U ND/NA Barium 7440-39-3 D pg/L 56 56 0 5 U 5 U ND/NA 15 15 0 Beryllium 7440-41-7 D pg/L 0.12 J 0.12 J 0 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA Boron 7440-42-8 D pg/L 50 U 50 U ND/NA 50 U 50 U ND/NA 50 U 50 U ND/NA Cadmium 7440-43-9 D pg/L 0.044 J 0.038 J -14.63 0.08 U 0.08 U ND/NA 0.058 J 0.073 J 22.9 Chromium 7440-47-3 D pg/L 0.62 0.63 1.6 0.27 J 0.21 J -25 0.33 J 0.35 J 5.88 Cobalt 7440-48-4 D pg/L 15.2 15.2 0 0.5 U 0.5 U ND/NA 0.42 J 0.48 J 13.33 Copper 7440-50-8 D pg/L 2.1 0.35 J -142.86 1 U 0.24 J ND/NA 0.25 J 0.43 J 52.94 Iron 7439-89-6 D pg/L 62 58 -6.67 32 J 36 J 11.76 50 U 27 J ND/NA Lead 7439-92-1 D pg/L 0.31 0.057 J -137.87 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA Manganese 7439-96-5 D pg/L 490 500 2.02 39 43 9.76 140 140 0 Mercury 7439-97-6 D pg/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 Molybdenum 7439-98-7 D pg/L 0.5 U 0.5 U ND/NA 8.4 8.9 5.78 0.85 1.2 34.15 Nickel 7440-02-0 D pg/L 1.6 1.6 0 0.59 0.72 19.85 0.64 0.67 4.58 Selenium 7782-49-2 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 7.1 7 -1.42 44 44 0 29 28 -3.51 Thallium 7440-28-0 D pg/L 0.13 0.13 0 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA Vanadium 7440-62-2 D pg/L 1 U 1 U ND/NA 0.28 J 0.34 J 19.35 1 U 0.33 J ND/NA Zinc 1 7440-66-6 1 D pg/L 1 15 4.3 J -110.88 10 U 1 10 U ND/NA 9.4 J 5.7 J -49.01 Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 4 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location GWA-12S Sample Location GWA-16D Sample Location GWA-16S Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA 410 420 2.41 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.82 1.2 37.62 2.2 2.4 8.7 0.5 U 0.5 U ND/NA Arsenic 7440-38-2 D pg/L 0.2 J 0.4 J 66.67 2.3 2.3 0 0.5 U 0.5 U ND/NA Barium 7440-39-3 D pg/L 16 15 -6.45 21 21 0 41 42 2.41 Beryllium 7440-41-7 D pg/L 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.095 J 0.096 J 1.05 Boron 7440-42-8 D pg/L 50 U 50 U ND/NA 37 J 35 J -5.56 50 U 50 U ND/NA Cadmium 7440-43-9 D pg/L 0.088 0.067 J -27.1 0.08 U 0.027 J ND/NA 0.067 J 0.063 J -6.15 Chromium 7440-47-3 D pg/L 0.39 J 0.32 J -19.72 1.2 0.92 -26.42 0.4 J 0.4 J 0 Cobalt 7440-48-4 D pg/L 0.15 J 0.16 J 6.45 0.5 U 0.5 U ND/NA 4.5 4.6 2.2 Copper 7440-50-8 D pg/L 9.7 5.4 -56.95 1.1 0.79 J -32.8 2.8 2.2 -24 Iron 7439-89-6 D pg/L 50 U 50 U ND/NA 50 U 50 U ND/NA 50 U 50 U ND/NA Lead 7439-92-1 D pg/L 1.2 0.36 -107.69 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA Manganese 7439-96-5 D pg/L 92 88 -4.44 5 U 5 U ND/NA 110 110 0 Mercury 7439-97-6 D pg/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 Molybdenum 7439-98-7 D pg/L 0.3 J 0.4 J 28.57 18.2 18.6 2.17 0.31 J 0.23 J -29.63 Nickel 7440-02-0 D pg/L 0.7 2.1 100 0.9 0.91 1.1 2.5 2.5 0 Selenium 7782-49-2 D pg/L 0.5 U 0.5 U ND/NA 0.69 0.65 -5.97 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 28 28 0 260 260 0 13 13 0 Thallium 7440-28-0 D pg/L 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA 0.07 J 0.076 J 8.22 Vanadium 7440-62-2 D pg/L 1 U 1 U ND/NA 11.3 11.2 -0.89 1 U 1 U ND/NA Zinc 1 7440-66-6 1 D pg/L 1 7.8 J 1 14 56.88 2.8 J 3.2 J 13.33 21 1 20 -4.88 Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 5 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location GWA-17D Sample Location GWA-17S Sample Location GWA-31D Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA 85 J 100 U ND/NA 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.98 0.99 1.02 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Arsenic 7440-38-2 D pg/L 0.64 0.65 1.55 0.13 J 0.13 J 0 0.5 U 0.5 U ND/NA Barium 7440-39-3 D pg/L 7.2 6.9 -4.26 31 28 -10.17 27 5 U ND/NA Beryllium 7440-41-7 D pg/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 pg/L 110 50 U ND/NA 50 U 50 U ND/NA 50 U 50 U ND/NA Cadmium 7440-43-9 D pg/L 0.08 U 0.032 J ND/NA 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA Chromium 7440-47-3 D pg/L 0.32 J 0.21 J -41.51 0.98 0.36 J -92.54 2.6 0.21 J -170.11 Cobalt 7440-48-4 D pg/L 0.5 U 0.5 U ND/NA 2.8 2 -33.33 0.15 J 0.5 U ND/NA Copper 7440-50-8 D pg/L 0.4 J 0.42 J 4.88 2 2.2 9.52 8.3 1 UJ ND/NA Iron 7439-89-6 D pg/L 50 U 50 U ND/NA 1300 1300 0 50 U 50 U ND/NA Lead 7439-92-1 D pg/L 0.1 U 0.1 U ND/NA 0.059 J 0.075 J 23.88 0.9 0.1 U ND/NA Manganese 7439-96-5 D pg/L 2.5 J 5 U ND/NA 630 570 -10 24 5 U ND/NA Mercury 7439-97-6 D pg/L 0.2 U 0.2 U ND/NA 0.2 U 0.2 U ND/NA 0.2 UJ 0.2 UJ ND/NA Molybdenum 7439-98-7 D pg/L 1.2 1.2 0 2.8 3.7 27.69 0.18 J 0.5 U ND/NA Nickel 7440-02-0 D pg/L 0.47 J 0.28 J -50.67 5.5 5.6 1.8 3 0.5 U ND/NA Selenium 7782-49-2 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 66 64 -3.08 22 21 -4.65 200 5 U ND/NA Thallium 7440-28-0 D pg/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 Vanadium 7440-62-2 D pg/L 1.3 1.4 7.41 0.88 J 1 U ND/NA 0.45 J 1 U ND/NA Zinc 1 7440-66-6 1 D pg/L 10 U 10 U ND/NA 6.5 J 3.4 J -62.63 59 J+ 10 UJ ND/NA Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 6 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location GWA-3S Sample Location GWA-41D Sample Location GWA-5BR2 Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.34 J 0.24 J -34.48 0.44 J 0.43 J -2.3 0.56 0.6 6.9 Arsenic 7440-38-2 D pg/L 0.5 U 0.5 U ND/NA 1.1 1.2 8.7 0.56 0.64 13.33 Barium 7440-39-3 D pg/L 62 62 0 20 19 -5.13 7.8 7.8 0 Beryllium 7440-41-7 D pg/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 pg/L 50 U 50 U ND/NA 32 J 47 J 37.97 51 47 J -8.16 Cadmium 7440-43-9 D pg/L 0.08 U 0.029 J ND/NA 0.08 U 0.08 U ND/NA 0.08 U 0.08 U ND/NA Chromium 7440-47-3 D pg/L 0.96 0.51 -61.22 3.2 3.1 -3.17 0.17 J 0.57 108.11 Cobalt 7440-48-4 D pg/L 0.26 J 0.25 J -3.92 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Copper 7440-50-8 D pg/L 0.33 J 0.51 J 42.86 0.53 J 0.78 J 38.17 0.72 J 0.23 J -103.16 Iron 7439-89-6 D pg/L 50 U 50 U ND/NA 50 U 50 U ND/NA 50 U 50 U ND/NA Lead 7439-92-1 D pg/L 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA 0.12 0.1 U ND/NA Manganese 7439-96-5 D pg/L 390 430 9.76 5 U 2.5 J ND/NA 48 45 -6.45 Mercury 7439-97-6 D pg/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 Molybdenum 7439-98-7 D pg/L 1.4 1.4 0 1.3 1.3 0 40.1 40.8 1.73 Nickel 7440-02-0 D pg/L 0.73 0.63 -14.71 0.42 J 0.39 J -7.41 0.23 J 0.58 86.42 Selenium 7782-49-2 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 150 150 0 190 190 0 86 86 0 Thallium 7440-28-0 D pg/L 0.022 J 0.021 J -4.65 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA Vanadium 7440-62-2 D pg/L 0.62 J 0.74 J 17.65 6.1 5.9 -3.33 0.42 J 0.4 J -4.88 Zinc 1 7440-66-6 1 D pg/L 1 19 19 0 7.1 J 6.6 J -7.3 9.7 J 10 U ND/NA Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 7 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location GWA-51D Sample Location GWA-5S Sample Location GWA-81D Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.23 J 0.22 J -4.44 0.5 U 0.5 U ND/NA 0.32 J 0.31 J -3.17 Arsenic 7440-38-2 D pg/L 0.33 J 0.34 J 2.99 0.19 J 0.13 J -37.5 0.5 0.47 J -6.19 Barium 7440-39-3 D pg/L 10 11 9.52 14 14 0 4.9 J 4.3 J -13.04 Beryllium 7440-41-7 D pg/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 pg/L 46 J 36 J -24.39 50 J 50 U ND/NA 50 U 50 U ND/NA Cadmium 7440-43-9 D pg/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 pg/L 0.34 J 0.19 J -56.6 0.31 J 0.4 J 25.35 0.53 0.34 J -43.68 Cobalt 7440-48-4 D pg/L 0.26 J 0.28 J 7.41 0.41 J 0.42 J 2.41 0.5 U 0.5 U ND/NA Copper 7440-50-8 D pg/L 0.99 J 0.5 J -65.77 9.6 0.32 J -187.1 0.92 J 1 U ND/NA Iron 7439-89-6 D pg/L 50 U 27 J ND/NA 50 U 50 U ND/NA 340 270 -22.95 Lead 7439-92-1 D pg/L 0.052 J 0.086 J 49.28 1.1 0.1 U ND/NA 0.31 0.1 U ND/NA Manganese 7439-96-5 D pg/L 1200 1200 0 180 180 0 50 43 -15.05 Mercury 7439-97-6 D pg/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 Molybdenum 7439-98-7 D pg/L 9.6 9.6 0 0.11 J 0.11 J 0 2 2 0 Nickel 7440-02-0 D pg/L 0.96 0.9 -6.45 0.74 0.64 -14.49 0.74 0.58 -24.24 Selenium 7782-49-2 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 170 170 0 80 80 0 64 61 -4.8 Thallium 7440-28-0 D pg/L 0.1 U 0.019 J ND/NA 0.1 U 0.1 U ND/NA 0.1 U 0.1 U ND/NA Vanadium 7440-62-2 D pg/L 0.7 J 0.66 J -5.88 0.35 J 1 U ND/NA 1 U 1 U ND/NA Zinc 1 7440-66-6 1 D pg/L 1 10 106 ND/NA 10 U 10 U ND/NA 3.4 J 10 U IN Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 8 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location GWA-8S Sample Location GWA-91D Sample Location GWA-9S Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.5 U 0.5 U ND/NA 4.1 3.4 -18.67 0.5 U 0.5 U ND/NA Arsenic 7440-38-2 D pg/L 0.5 U 0.5 U ND/NA 0.15 J 0.15 J 0 0.5 U 0.5 U ND/NA Barium 7440-39-3 D pg/L 67 69 2.94 5.2 5.4 3.77 51 49 -4 Beryllium 7440-41-7 D pg/L 0.33 0.29 -12.9 0.2 U 0.2 U ND/NA 0.14 J 0.18 J 25 Boron 7440-42-8 D pg/L 82 77 -6.29 50 U 50 U ND/NA 50 U 50 U ND/NA Cadmium 7440-43-9 D pg/L 0.12 0.12 0 0.12 0.094 -24.3 0.045 J 0.043 J -4.55 Chromium 7440-47-3 D pg/L 0.73 0.7 -4.2 0.71 1.3 58.71 0.39 J 0.33 J -16.67 Cobalt 7440-48-4 D pg/L 0.94 0.92 -2.15 4.8 4.7 -2.11 1.1 1.1 0 Copper 7440-50-8 D pg/L 9.3 1.7 -138.18 0.83 J 1 18.58 10.1 12.2 18.83 Iron 7439-89-6 D pg/L 50 U 50 U ND/NA 50 U 32 J ND/NA 50 U 50 U ND/NA Lead 7439-92-1 D pg/L 1.1 0.12 -160.66 0.056 J 0.1 56.41 0.1 U 0.059 J ND/NA Manganese 7439-96-5 D pg/L 270 260 -3.77 27 29 7.14 34 35 2.9 Mercury 7439-97-6 D pg/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 Molybdenum 7439-98-7 D pg/L 0.26 J 0.21 J -21.28 0.67 0.7 4.38 0.27 J 0.36 J 28.57 Nickel 7440-02-0 D pg/L 1.1 2.1 62.5 3.3 3.3 0 0.51 J 0.51 J 0 Selenium 7782-49-2 D pg/L 5.2 5.1 -1.94 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 250 250 0 48 49 2.06 6A 6.7 4.58 Thallium 7440-28-0 D pg/L 0.021 J 0.021 J 0 0.1 U 0.1 U ND/NA 0.098 J 0.094 J -4.17 Vanadium 7440-62-2 D pg/L 1 U 1 U ND/NA 0.72 J 0.59 J -19.85 1 U 1 U ND/NA Zinc 1 7440-66-6 1 D pg/L 1 3.6 J 1 10 U ND/NA 1 20 1 17 -16.22 1 39 1 46 16.47 Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 9 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location MW-200BR Sample Location MW-200D Sample Location MW-200S Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA 100 U 100 U ND/NA 170 190 11.11 Antimony 7440-36-0 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Arsenic 7440-38-2 D pg/L 1.5 1.6 6.45 0.79 0.98 21.47 4.2 4.6 9.09 Barium 7440-39-3 D pg/L 5 U 5 U ND/NA 8.1 8.3 2.44 44 44 0 Beryllium 7440-41-7 D pg/L 0.14 J 0.14 J 0 0.086 J 0.089 J 3.43 0.23 0.25 8.33 Boron 7440-42-8 D pg/L 83 84 1.2 1200 1300 8 57 33 J -53.33 Cadmium 7440-43-9 D pg/L 0.08 U 0.08 U ND/NA 0.1 0.084 -17.39 0.033 J 0.035 J 5.88 Chromium 7440-47-3 D pg/L 0.33 J 0.21 J -44.44 0.45 J 0.53 16.33 0.68 0.71 4.32 Cobalt 7440-48-4 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.14 J ND/NA 13.9 14.3 2.84 Copper 7440-50-8 D pg/L 6.9 0.22 J -187.64 1.9 2.8 38.3 0.68 J 1 38.1 Iron 7439-89-6 D pg/L 200 180 -10.53 50 U 28 J ND/NA 3300 3300 0 Lead 7439-92-1 D pg/L 1.3 0.1 U ND/NA 0.36 0.12 -100 0.29 0.46 45.33 Manganese 7439-96-5 D pg/L 130 130 0 46 42 -9.09 430 420 -2.35 Mercury 7439-97-6 D pg/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 Molybdenum 7439-98-7 D pg/L 0.45 J 0.45 J 0 0.41 J 0.51 21.74 0.5 U 0.5 U ND/NA Nickel 7440-02-0 D pg/L 0.27 J 0.5 U ND/NA 1.3 2.8 73.17 2.5 2.6 3.92 Selenium 7782-49-2 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.22 J ND/NA Strontium 7440-24-6 D pg/L 180 180 0 260 280 7.41 54 55 1.83 Thallium 7440-28-0 D pg/L 0.1 U 0.1 U ND/NA 0.039 J 0.03 J -26.09 0.033 J 0.034 J 2.99 Vanadium 7440-62-2 D pg/L 1 U 1 U ND/NA 1 U 1 U ND/NA 1.6 1.5 -6.45 Zinc 1 7440-66-6 1 D pg/L 1 11 3.8 J -97.3 10 U 1 10 U ND/NA 4.9 J 1 17 110.5 Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 10 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location MW-202BR Sample Location MW-202D Sample Location MW-202S Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pm Result 0.1 pm Result RPD (%) 0.45 pmm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA 100 U 100 U ND/NA 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Arsenic 7440-38-2 D pg/L 0.24 J 0.23 J -4.26 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Barium 7440-39-3 D pg/L 5.7 5.6 -1.77 5.4 5.5 1.83 19 19 0 Beryllium 7440-41-7 D pg/L 0.2 U 0.072 J ND/NA 0.2 U 0.2 U ND/NA 0.23 0.19 J -19.05 Boron 7440-42-8 D pg/L 50 U 50 U ND/NA 50 U 50 U ND/NA 50 U 50 U ND/NA Cadmium 7440-43-9 D pg/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 pg/L 0.94 0.91 -3.24 0.48 J 0.42 J -13.33 0.67 0.59 -12.7 Cobalt 7440-48-4 D pg/L 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Copper 7440-50-8 D pg/L 7.1 4 -55.86 0.51 J 2.2 124.72 1.2 9.1 153.4 Iron 7439-89-6 D pg/L 50 U 50 U ND/NA 50 U 50 U ND/NA 50 U 50 U ND/NA Lead 7439-92-1 D pg/L 0.71 0.13 -138.1 0.1 U 0.16 ND/NA 0.31 0.84 92.17 Manganese 7439-96-5 D pg/L 6.5 5.9 -9.68 5 U 5 U ND/NA 2.6 J 2.9 J 10.91 Mercury 7439-97-6 D pg/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 Molybdenum 7439-98-7 D pg/L 2.6 2.3 -12.24 0.36 J 0.35 J -2.82 0.5 U 0.5 U ND/NA Nickel 7440-02-0 D pg/L 0.8 0.88 9.52 3.4 3.4 0 0.54 1.1 68.29 Selenium 7782-49-2 D pg/L 0.21 J 0.5 U ND/NA 0.5 U 0.5 U ND/NA 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 63 60 -4.88 39 38 -2.6 8.9 8.8 -1 A Thallium 7440-28-0 D pg/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 Vanadium 7440-62-2 D pg/L 0.77 J 0.82 J 6.29 0.32 J 1 U ND/NA 1 U 1 U ND/NA Zinc 1 7440-66-6 1 D pg/L 1 34 28 1 -19.35 1 10 U 1 15 ND/NA 1 10 U 1 3.7 J ND/NA Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 11 of 12 Table 2-3 Comparison of 0.45 pm and 0.1 pm Filter Sample Results - Groundwater Sample Location MW-203BR Constituent CAS RN Fraction Unit 0.45 pm Result 0.1 pm Result RPD (%) Aluminum 7429-90-5 D pg/L 100 U 100 U ND/NA Antimony 7440-36-0 D pg/L 0.5 U 0.5 U ND/NA Arsenic 7440-38-2 D pg/L 0.15 J 0.12 J -22.22 Barium 7440-39-3 D pg/L 5 U 5 U ND/NA Beryllium 7440-41-7 D pg/L 0.2 U 0.2 U ND/NA Boron 7440-42-8 D pg/L 50 U 50 U ND/NA Cadmium 7440-43-9 D pg/L 0.08 U 0.08 U ND/NA Chromium 7440-47-3 D pg/L 1.1 1 -9.52 Cobalt 7440-48-4 D pg/L 0.5 U 0.5 U ND/NA Copper 7440-50-8 D pg/L 2.2 0.68 J -105.56 Iron 7439-89-6 D pg/L 50 U 50 U ND/NA Lead 7439-92-1 D pg/L 0.22 0.061 J -113.17 Manganese 7439-96-5 D pg/L 4 J 4.9 J 20.22 Mercury 7439-97-6 D pg/L 0.2 U 0.2 U ND/NA Molybdenum 7439-98-7 D pg/L 3.2 3.1 -3.17 Nickel 7440-02-0 D pg/L 0.86 0.65 -27.81 Selenium 7782-49-2 D pg/L 0.5 U 0.5 U ND/NA Strontium 7440-24-6 D pg/L 44 45 2.25 Thallium 7440-28-0 D pg/L 0.1 U 0.1 U ND/NA Vanadium 7440-62-2 D pg/L 2.9 2.8 -3.51 Zinc 1 7440-66-6 1 D pg/L 25 11 1 -77.78 Notes: = RPD greater than 20% pg/L = micrograms per liter pm = micron RPD (%) = relative percent difference ND/NA = not detected/not applicable D = dissolved U = not detected J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 12 of 12 Table 2-4 Ash Porewater Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AB-4S AB-4S AB-4SL AB-4SL AB-5S AB-5S AB-5SL AB-5SL AB-6S AB-6S AB-6SL AB-6SL Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 7/15/2015 10/1/2015 7/16/2015 10/1/2015 7/15/2015 10/1/2015 7/14/2015 10/1/2015 7/8/2015 10/1/2015 7/9/2015 10/1/2015 N N N N N N N N N N N N AB-4S BL-AB-4S-NS-3Q15 AB-4SL BL-AB-4SL-NS-3Q15 AB-5S BL-AB-5S-NS-3Q15 AB-5SL BL-AB-5SL-NS-3Q15 AB-6S BL-AB-6S-NS-3Q15 AB-6SL BL-AB-6SL-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit - Aluminum 7429-90-5 D /L 74 J 61 J 10000 10400 110 100 U 1000 970 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T /L 1 72 J 100 U 11300 11700 110 150 1600 1 1100 100 U 1 100 U 100 U 100 U Antimony 7440-36-0 D /L 0.5 U 0.5 U 8.2 9.4 0.5 U 0.36 J 8 11 0.28 J 1 3.8 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC u /L 0.5 U 0.5 U 8.1 9.8 0.5 U 0.36 J 8.9 10.5 0.3 J W 3.6 0.5 U 0.5 U Arsenic 7440-38-2 D /L 76.9 90.5 63.5 69.6 87 72.8 43.7 51.3 7.1 6.4 6.5 13.8 Arsenic 7440-38-2 T 10 02L u /L 81.2 r 92.7 67.6 71.1 93.3 69.2 45.2 51.8 8.4 6.6 11.8 Barium 7440-39-3 D /L 140 160 170 170 140 53 300 370 200 270 240 160 Barium 7440-39-3 T 700 02L /L 150 5 U 190 1 200 140 54 330 340 200 280 190 160 Beryllium 7440-41-7 D /L 0.26 0.2U 0.151 0.2U 0.14J 0.181 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Beryllium 7440-41-7 T 4 IMAC u /L 0.2 U 0.2 U 0.23 0.17 J 0.2 U 0.24 0.081 J 0.1 J 0.2 U 0.2 U 0.2 U 0.2 U Boron 7440-42-8 D /L 23300 22400 12300 14400 11900 7100 13800 16200 98 550 2300 1000 Boron 7440-42-8 T 700 02L N /L 21900 J 50 UJ 13500 13300 11100 6600 15000 16300 98 510 1600 1100 Cadmium 7440-43-9 D /L 0.08 U 0.08 U 1.6 U 0.35 0.08 U 0.08 U 0.041 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T 2 02L u /L 0.08 U 0.08 U 1.2 0.25 0.08 U 0.08 U 0.06 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U Calcium 7440-70-2 T /L 327000 317000 148000 141000 212000 113000 463000 194000 9880 53600 36100 30400 Chromium 7440-47-3 D I ljq/L 0.32 J+ 0.22 J 0.56 J+ 0.25 J 0.5 U 0.31 J 0.38 J 0.43 J 0.36 J+ 5.2 0.3 J+ 0.57 Chromium 7440-47-3 T 10 02L /L 8.5 1.8 J+ 3.3 8.4 0.25 J+ 0.38 J+ 1.5 1.5 J+ 1.2 J+ 4.8 0.43 J+ 0.28 J Cobalt 7440-48-4 D /L 0.23 J 0.5 U 0.5 U 0.5 U 0.5 U 5.8 0.5 U 0.5 U 0.3 J 0.5 U 0.5 U 0.5 U Cobalt 7440-48-4 T I° IMAC N /L 0.26 J 0.2 J 1.1 0.79 0.5 U 5.6 0.45 J 0.44 J 0.35 J 0.5 U 0.5 U 0.5 U Copper 7440-50-8 D /L 1 U 1 U 0.89 J+ 0.67 J 10.6 3.5 1 U 1 U 1 U 0.57 J 1 U 1 U Copper 7440-50-8 T 1000 02L /L 1 U 0.41 J 3.6 2.6 1 U 1 U 1.3 1.2 1 U 0.72 J 1 U 1 U Iron 7439-89-6 D /L 5000 5400 50 U 50 U 260 3600 50 U 50 U 430 50 U 5600 2300 Iron 7439-89-6 T 300 02L u /L 5000 50 U 370 310 J+ 4200 160 94 750 _ 68 3700 Lead 7439-92-1 D /L 0.1 U 0.1 U 0.07 J+ 0.12 0.1 U 0.47 0.048 J 0.046 J 0.1 U 0.1 U 0.1 U 0.1 U Lead 7439-92-1 T 15 02L /L 0.1 U 0.18 2 1.3 0.1 U 0.1 U 0.76 0.7 0.1 U 0.1 U 0.1 U 0.1 U Magnesium 7439-95-4 T /L 108000 105000 304 340 53800 30000 11200 18600 3950 8500 4830 3930 Manganese 7439-96-5 D /L 350 410 5 U 5 U 610 520 5 U 5 U 12 5 U 180 120 Manganese 7439-96-5 T 50 02L N /L 5 U 2.9 J 4.6 J 630 0 A 5 U 5 U 11 5 U 140 13 Mercury 7439-97-6 D /L 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 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L /L 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 Methane 74-82-8 N /L 135 223 9160 5240 1.4 J+ 416 9780 6920 155 1.3 J+ 20400 7780 Molybdenum 7439-98-7 D /L 18.1 19.5 3710 3860 26.4 25.8 147 164 6.3 71.5 4 2.5 Molybdenum 7439-98-7 T /L 19.2 19.8 3560 3140 J+ 27.3 24.5 153 154 6.6 65.4 3.6 2.1 Nickel 7440-02-0 D /L 0.5 U 0.34 J 0.57 J+ 0.41 J 0.28 J 9.4 0.5 U 0.27 J 0.65 J+ 1.2 0.5 U 0.31 J Nickel 7440-02-0 T 100 02L u /L 2 J+ 1 2.3 4.4 0.44 J+ 8.6 0.83 1 J+ 1.3 J+ 0.92 0.5 U 0.5 U Potassium 7440-09-7 T /L 7900 8560 12000 13900 7750 7310 22000 23100 4230 J 5740 5050 4990 J Selenium 7782-49-2 D /L 0.5 U 0.25 J 38.5 42.2 0.62 2.6 3.6 5.3 1.5 J+ 74.5 0.34 J 0.23 J Selenium 7782-49-2 T 20 02L u /L 0.21 J 0.27 J 38.4 41.6 0.6 2.5 3.8 5.1 0.93 0.27 J 0.27 J Sodium 7440-23-5 T /L 13300 14400 5000 U 5000 U 11200 9120 13800 15000 7490 9870 4280 J 5300 Strontium 7440-24-6 D /L 1500 1700 3000 2800 1200 640 5400 J- 6100 100 380 1300 790 Strontium 7440-24-6 T /L 1500 5 U 3000 2800 1300 630 5800 5600 100 400 1000 870 Thallium 7440-28-0 D /L 0.1 U 0.1 U 0.15 0.067 J 0.1 U 0.6 0.11 0.14 0.12 0.2 0.1 U 0.1 U Thallium 7440-28-0 T 0.2 IMAC u /L 0.019 J 0.024 J 0.22 0.16 0.048 J 0.6 0.14 0.17 0.073 J 0.2 0.1 U 0.1 U Vanadium 7440-62-2 D /L 1 U 1 U 864 974 1 U 0.81 J 93.9 87.7 4.4 12.3 0.38 J 1 U Vanadium 7440-62-2 T 0.3 IMAC u /L 0.5 J+ 1 867 874 J+ 0.45 J+ 1 1.4 99.3 85.6 5.5 11.6 0.38 J 0.33 J Zinc 7440-66-6 D /L 10 U 12 10 U 10 U 10 U 20 10 U 10 U 3.4 J 10 U 10 U 4.6 J Zinc 7440-66-6 T 1000 02L /L 10 U 10 U 3 J 12 10 U 20 10 U 2.5 J 10 U 10 U 10 U 10 U Total Dissolved Solids TDS N 500000 02L u /L 2340000 1430000 595000 564000 1110000 693000 2880000 2430000 92000 267000 191000 149000 Total Organic Carbon TOC N /L 900 J 780 J 3300 2900 530 J 510 J 560 J 1000 U 1700 1000 3100 3100 Total Suspended Solids TSS N /L 8100 30000 26300 149000 2500 U 7500 30500 1 890000 2500 U 2500 U 11200 2500 U Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 109000 115000 5000 U 5000 U 5000 U 63100 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 39300 38500 5000 U 5000 U 100000 63400 73700 5000 U 28600 39000 115000 96000 Alkalinity, lab ALK-LAB N /L 39300 38500 140000 139000 100000 63400 73700 78700 28600 39000 115000 96000 Chloride 16887-00-6 N 250000 02L u /L 783000 716000 7700 8300 298000 125000 600000 J+ 706000 8600 J+ 10100 7000 7700 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 11 J- 20 U 11 J 20 U 20 UJ 20 U 20 U 15 J 42 410 20 U 20 U Sulfate 14808-79-8 N 250000 02L u /L 180000 203000 241000 252000 246000 172000 209000J+ 244000 16000 - 2000 4000 Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 UJ Arsenic 7440-38-2 T 10 02L u /L 59.2 - 48.7 71.7 - 41.7 J+ - 6.44 J+ - 5.22 J+ - Chromium 7440-47-3 T 10 02L /L 0.309 J+ 1.06 J+ 0.82 J+ 3.49 J+ 1.39 J+ 0.632 J+ Iron 7439-89-6 T 300 02L u /L 5150 100 U 239 1430 726 J+ 3580 J+ Manganese 7439-96-5 D /L 375 2 U 543 0.674 J+ 9.78 J+ 186 Manganese 7439-96-5 T 50 02L u /L 387 2 U 644 1.52 J+ 1 11.7 J+ 1 177 As III 7784-46-5 T I pg/L 1 67.1 J+ 2.56 J+ 84.4 J+ 4.95 J+ 5.83 J+ 5.78 J+ As V 10103-60-3 T /L 7.5 U 46.1 7.5 U 36.7 J+ 0.608 J+ 0.5 U Chromium VI 18540-29-9 D 0.07 DHHS /L 0.02 U 0.02 U 0.02 U 0.02 U Chromium VI 18540-29-9 T 0.07 1 DHHS I pg/L - - Page 1 of 4 Table 2-4 Ash Porewater Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AB-4S AB-4S AB-4SL AB-4SL AB-5S AB-5S AB-5SL A113-5SL AB-6S AB-6S AB-6SL AB-6SL Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 7/15/2015 10/1/2015 7/16/2015 10/1/2015 7/15/2015 10/1/2015 7/14/2015 10/1/2015 7/8/2015 10/1/2015 7/9/2015 10/1/2015 N N N N N N N N N N N N AB-4S BL-AB-4S-NS-3Q15 AB-4SL BL-AB-4SL-NS-3Q15 AB-5S BL-AB-5S-NS-3015 AB-5SL BL-AB-5SL-NS-3Q15 A13-6S BL-AB-6S-NS-3Q15 AB-6SL BL-AB-6SL-NS-3615 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Fe II 1345-25-1 T /L 408 J- 30 UJ 30.2 J- 30 U 110 J+ 560 J- Fe III 1309-37-1 T /L Mn II 1344-43-0 T /L Mn IV 1313-13-9 T /L Se IV 10102-18-8 T /L 2 U 11.3 2 U 2.21 2 U 2 U Se VI 13410-01-0 T /L 2 U 22.2 2 U 2 U 0.686 J 2 UJ Dissolved Oxygen DO N m /L 0.55 0.69 0.3 0.03 0.48 0.61 0.74 0.45 0.24 1.6 0.3 0.7 Temperature TEMP N Deg C 25.5 22.2 29.5 20.9 27.2 20.2 27.6 17.7 32.3 24 27.1 24.8 pH PH N 6.5 8.5 02L SU 6.93 7.1 10.18 10.5 8.04 6.66 9.59 9.99 6.61 6.6 6.71 6.9 Turbidity, field TURB N NTU 0.26 2.5 26.24 9.9 0.25 1.56 13.11 7.81 4.93 1.1 7.71 1.3 Specific Conductivity field SC NPS/cm 2570 3062 682 839 1465 823 2378 2430 140.8 414.7 367.6 249 Oxidation Reduction Potential ORP N mV -63.1 -98.6 0.3 -114.1 -108.2 -90.4 77.6 -23.1 166.1 45.6 -52.2 -99.3 GW Depth TOC GW DEPTH-TOC N ft 6.1 5.85 5.79 5.63 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 2 of 4 Table 2-4 Ash Porewater Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AB-7S AB-7S AB-7S AB-8S AB-8S AB-8SL AB-8SL AB-8SL Round 1 Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 2 6/16/2015 7/13/2015 9/29/2015 6/16/2015 10/1/2015 6/17/2015 7/13/2015 10/1/2015 N N N N N N N N AB-7S AB-7S BL-AB-7S-NS-3Q15 AB-8S BL-AB-8S-NS-3Q15 AB-8SL AB-8SL BL-AB-8SL-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D /L 3110 480 J 11000 11 100 U 5000 980 Aluminum 7429-90-5 T /L 1970 J+ 1800 11600 13.6 71 J 5000 3400 Antimony 7440-36-0 D /L 0.5 UJ 0.5 U 0.5 U 0.25 J 1.1 15.9 10.7 Antimony 7440-36-0 T 1 IMAC pg/L 0.5 U 0.5 U 0.5 U 0.26 J 1.1 15.2 12.3 Arsenic 7440-38-2 D /L 25.3 31.7 88.2 30.3 8.2 139 156 Arsenic 7440-38-2 T 10 02L pg/L 24.9 J+ 32.8 108 30.7 9 146 139 Barium 7440-39-3 D /L 23 J+ 23 J 50 U 68 1 72 94 160 Barium 7440-39-3 T 700 02L /L 24 J 24 J 50 U 70 67 98 170 Beryllium 7440-41-7 D /L 1.2 J+ 0.68 9.4 0.2 UJ 0.2 U 0.2 U 0.2 U Beryllium 7440-41-7 T 4 IMAC p /L 0.78 0.64 7.8 0.2 U 0.2 U 0.15 J 0.24 Boron 7440-42-8 D /L 4600 3100 1200 2200 1600 13100 J- 14100 Boron 7440-42-8 T 700 02L p /L 4800 3000 1300 2200 1600 13000 13800 Cadmium 7440-43-9 D /L 0.84 0.65 4.6 0.08 UJ 0.23 0.1 0.18 Cadmium 7440-43-9 T 2 02L p /L 0.69 0.58 3.7 0.08 U 1 0.24 0.4 U 0.14 Calcium 7440-70-2 T /L 117000 100000 92800 29800 62200 113000 88600 Chromium 7440-47-3 D /L 1.3 J+ 0.58 3.6 1.4 J+ 0.62 0.28 J+ 0.24 J Chromium 7440-47-3 T 10 02L /L 5.4 0.64 4.1 1.5 0.71 J+ 0.36 J 5.6 Cobalt 7440-48-4 D /L 156 J+ 246 417 J+ 3.4 J+ 7.2 0.5 U 0.5 U Cobalt 7440-48-4 T 1 IMAC pg/L 155 J+ 243 354 J+ 3.4 6.9 0.5 U 0.87 Copper 7440-50-8 D /L 4.4 J+ 0.25 J 6.7 2.2 J+ 4.5 1 U 1 U Copper 7440-50-8 T 1000 02L /L 1.3 0.65 J 8.9 1 U 0.54 J 1 U 3 Iron 7439-89-6 D /L 69300 J- 65400 108000 5140 1900 50 U 130 Iron 7439-89-6 T 300 02L pg/L 77800 J- 70400 113000 5120 1800 100 790 Lead 7439-92-1 D /L 0.3 J+ 0.097 J 1 0.1 UJ 0.6 0.1 U 0.1 U Lead 7439-92-1 T 15 02L /L 0.12 0.089 J 5 UJ 0.1 U 0.1 U 0.074 J 1.9 Magnesium 7439-95-4 T /L 25600 30800 24600 7950 9590 1870 4230 Manganese 7439-96-5 D /L 5700 9000 11400 120 90 4.9 J 15 Manganese 7439-96-5 T 50 02L pg/L 6300 9200 11700 120 84 5.9 18 Mercury 7439-97-6 D /L - 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L /L 0.000934 0.08 J 0.2 U 0.000621 0.2 U 0.088 J+ 0.2 U Methane 74-82-8 N /L 520 512 83 43.3 16000 41.2 Molybdenum 7439-98-7 D /L 0.28 J 0.72 1 U 23 18.6 2510 1440 Molybdenum 7439-98-7 T /L 0.36 J 0.85 0.32 J 22.9 18.1 2530 1360 Nickel 7440-02-0 D /L 70.1 94.6 191 J+ 4.9 J+ 14.2 0.34 J 0.79 Nickel 7440-02-0 T 100 02L pg/L 68.3 91.6 182 4.7 13.4 0.36 J+ 3 Potassium 7440-09-7 T /L 9470 25000 U 50000 U 11200 15600 11400 11200 Selenium 7782-49-2 D /L 6.2 4.5 29.4 0.47 J+ 60.7 13.1 3 Selenium 7782-49-2 T 20 02L pg/L 5.1 4.3 94.4 0.45 J 59.8 13.4 2.8 Sodium 7440-23-5 T /L 14300 25000 U 50000 U 10400 10100 2580 J 5000 U Strontium 7440-24-6 D /L 640 600 560 250 550 1700 1600 Strontium 7440-24-6 T /L 660 610 600 260 520 1700 1600 Thallium 7440-28-0 D /L 1.3 1.3 5.4 0.45 J+ 5.2 0.045 J 0.09 J Thallium 7440-28-0 T 0.2 IMAC pg/L 1.2 1.4 4.6 J 0.45 1 5 0.05 J 0.29 Vanadium 7440-62-2 D pg/L 0.33 J+ 1 U 8.1 0.75 J+ 1.6 838 79.9 Vanadium 7440-62-2 T 0.3 IMAC pg/L 1 U 0.43 J 7.2 0.84 J 1.8 827 84.6 Zinc 7440-66-6 D /L 140 140 560 10 UJ 18 10 U 3.6 J Zinc 7440-66-6 T 1000 02L /L 130 130 580 10 U 28 8 J+ 9.2 J Total Dissolved Solids TDS N 500000 02L pg/L 887000 900000 1300000 242000 390000 472000 344000 Total Organic Carbon TOC N /L 1400 1400 1000 J 1200 1200 3100 1 2600 Total Suspended Solids TSS N /L 25300 11900 26200 2500 U 27000 J+ 2500 U 246000 Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 10000 U 5000 U 19000 16500 Alkalinity, HCO3 ALK-HCO3 N /L 36800 5000 U 37000 17700 83000 53600 Alkalinity, lab ALK-LAB N /L 36800 37000 17700 100000 70100 Chloride 16887-00-6 N 250000 02L pg/L 1 122000 98800 79300 46300 10100 6800 8400 Nitro en, NO2 plus NO3 NO2-NO3 N /L 40 20 U 34 20 U 990 20 U 23 J+ Sulfate 14808-79-8 N 250000 02L pg/L 395000 439000 814000 47200 196000 165000 M1 155000 Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U 100 U 200 U 100 U Arsenic 7440-38-2 T 10 02L pg/L - - - - - - 120 J+ - Chromium 7440-47-3 T 10 02L /L 1.61 Iron 7439-89-6 T 300 02L pg/L 150 Manganese 7439-96-5 D /L 3.64 Manganese 7439-96-5 T 50 02L pg/L 1.63 J+ As III 7784-46-5 T /L 11.4 21 32.7 J+ As V 10103-60-3 T /L 3.69 2.76 87.3 J+ Chromium VI 18540-29-9 D 0.07 DHHS /L 0.02 U Chromium VI 18540-29-9 T 0.07 DHHS /L 0.05 U 0.05 U Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 3 of 4 Table 2-4 Ash Porewater Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AB-7S AB-7S AB-7S AB-8S AB-8S AB-8SL AB-8SL AB-8SL Round 1 Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 2 6/16/2015 7/13/2015 9/29/2015 6/16/2015 10/1/2015 6/17/2015 7/13/2015 10/1/2015 N N N N N N N N AB-7S AB-7S BL-AB-7S-NS-3Q15 AB-8S BL-AB-8S-NS-3Q15 AB-8SL AB-8SL BL-AB-8SL-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Fe II 1345-25-1 T /L 83800 4760 30 U Fe III 1309-37-1 T /L 3980 357 Mn II 1344-43-0 T /L 8150 119 Mn IV 1313-13-9 T /L 234 1 U Se IV 10102-18-8 T /L 0.5 U 0.5 U 8.15 Se VI 13410-01-0 T /L 0.5 U 0.5 U 1.07 J Dissolved Oxygen DO N m /L 0.49 0.57 0.2 0.51 0.9 0.34 0.31 0.2 Temperature TEMP N Deq C 20.1 27.4 24.3 21 22 19.7 32.5 19.7 pH PH N 6.5 8.5 02L SU 5.7 5.75 4.2 6.2 6.1 10.6 10.14 8.6 Turbidity, field TURB N NTU 1.5 4.14 10 1.4 2.1 6.6 8.56 9.5 Specific Conductivity field SC NPS/cm 1066 1170 1454 301 520.4 537 649 524.4 Oxidation Reduction Potential ORP N mV 29.8 75.2 220.4 28.1 71.3 29.5 70.6 -194.6 GW Depth TOC GW DEPTH-TOC N ft Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 4 of 4 Table 2-5 Ash Basin Water Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: SW-AB1 SW-AB2 SW-AB2 SW-AB2 SW-AB3 SW-AB4 SW-AB4 SW-AB5 SW-AB5 SW-AB6 SW-AB6 SW-AB7 Round 1 Round 1 Round 1 Round 2 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 6/15/2015 6/11/2015 7/20/2015 9/30/2015 9/30/2015 6/11/2015 9/30/2015 6/12/2015 9/30/2015 6/11/2015 10/1/2015 6/11/2015 N N N N N N N N N N N N SW-AB1 SW-AB2 SW-AB2 BL-SW-AB2-NS-3Q15 BL-SW-AB3-NS-3Q15 SW-AB4 BL-SW-AB4-NS-3Q15 SW-AB5 BL-SW-AB5-NS-3Q15 SW-AB6 BL-SW-AB6-NS-3Q15 SW-AB7 Constituent CAS RN Fraction SWQS Criteria Min. (for ranges only) NCDEQ 02B SWQS (Water Supply) GWQS Criteria Min. (for ranges only) NCDEQ 02L GWQS, IMACs, DHHS Unit Aluminum 7429-90-5 D - p /L 53.7 51.1 82 J 190 40.4 280 5.8 J+ 100 U 7.5 J 100 U 10 U Aluminum 7429-90-5 T 87 pg/L 58.5 77.9 - 160 330 62.9 640 9 J 380 11.6 100 U 14.6 Antimony 7440-36-0 D I - /L 1.2 1.3 1.3 1.4 1.4 0.49 J 0.5 U 0.36 J 0.5 U 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 5.6 1 /L 1.2 1.2 1 1.3 1.4 1.3 0.5 U 0.5 U 0.15 J 0.5 U 0.5 U 0.5 U 0.5 U Arsenic 7440-38-2 D 150 /L 5.1 5.1 6.7 16 5.5 8.2 2.4 9.6 8.6 5.7 2.5 2.9 Arsenic 7440-38-2 T 10 10 pg/L 5.1 4.8 9 15.3 12.6 10.4 3.3 8.9 11.9 6.1 3.4 5 Barium 7440-39-3 D /L 72 68 76 85 100 150 75 120 81 46 1 56 43 Barium 7440-39-3 T 1000 700 /L 72 70 77 89 100 160 80 130 81 50 61 62 Beryllium 7440-41-7 D 6.5 /L 0.2U 0.2U 0.2U 0.2U 0.161 0.2U 0.0911 0.2U 0.2U 0.2U 0.2U 0.2U Beryllium 7440-41-7 T 4 /L 0.098 J 0.2 U 0.11 J 0.07 J 0.16 J 0.2 U 0.13 J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Boron 7440-42-8 D /L 15700 14600 17200 14300 14100 5200 1200 5200 2700 680 660 51 Boron 7440-42-8 T 700 /L 15900 14900 16300 J+ 14100 13600 5300 1000 5200 2500 670 600 59 Cadmium 7440-43-9 D 0.15 - pg/L 0.067 J 0.11 0.053 J 0.1 0.29 0.08 U 0.082 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T 2 /L 0.092 0.12 0.1 0.096 0.19 0.08 U 0.092 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U Calcium 7440-70-2 T /L 215000 215000J- 219000 226000 229000 67500 13400 63600 34600 13500 11200 2830 Chromium 7440-47-3 D 11 /L 0.76 J+ 0.81 J+ 0.54 J+ 1.3 0.52 0.46 J+ 0.58 0.34 J 0.25 J 0.68 J+ 0.6 0.3 J+ Chromium 7440-47-3 T 10 /L 0.54 0.64 1.6 1.5 J+ 1.5 J+ 0.54 1 J+ 0.27 J 0.57 0.6 0.8 0.43 J Cobalt 7440-48-4 D /L 0.25 J 0.27 J 0.18 J 0.93 4.7 0.13 J 3.2 0.5 U 0.13 J 0.5 U 0.5 U 0.5 U Cobalt 7440-48-4 T 3 1 pg/L 0.29 J 0.5 UJ 0.72 1.2 2.2 0.26 J 3.4 0.5 U 0.24 J 0.5 U 0.5 U 0.38 J Copper 7440-50-8 D 2.7 - pg/L 1.3 1 U 2.5 J+ 0.76 J 2.5 1.6 3.2 0.5 J 1 0.3 J 0.31 J 0.37 J Copper 7440-50-8 T 1000 /L 1.2 1.2 2.1 1.1 J+ 1.8 J+ 1.6 3.9 J+ 0.46 J 1.2 0.72 J 0.39 J 0.74 J Iron 7439-89-6 D /L 21 J 50 U 50 U 250 47.6 J 100 50 U 49 J 66 28 J 235 Iron 7439-89-6 T 300 /L 34.5 J 37.4 J 120 580 202 500 24.6 J 520 131 120 1420 Lead 7439-92-1 D 0.54 - pg/L 0.1 U 0.1 U 0.18 0.1 U 0.083 J 0.1 U 0.42 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U Lead 7439-92-1 T 15 /L 0.055 J+ 0.063 J 0.72 0.28 J+ 0.28 J+ 0.1 U 0.96 0.1 U 0.3 0.047 J 0.063 J 0.16 Magnesium 7439-95-4 T /L 73300 68800 71500 68900 70200 22500 4780 22600 11800 5110 4680 1920 Manganese 7439-96-5 D /L 59 17 85 69 290 38 600 9 43 13 8.1 15 Manganese 7439-96-5 T 50 /L 76 94 130 120 290 100 650 30 70 58 23 330 Mercury 7439-97-6 D /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 0.012 1 /L 0.00181 0.00159 0.00143 0.00188 J+ 0.00172 J+ 0.00161 0.00962 0.000644 0.00358 J+ 0.000876 0.00128 J+ 0.00119 Methane 74-82-8 N /L 14 11 14.2 J+ 3.6 J+ 25.7 J+ 10 U 3 J+ 11 4.7 J 24 10.6 J+ 14 Molybdenum 7439-98-7 D /L 21 23.3 22.7 24.9 23.5 6.9 1.3 9.5 5.8 1.2 0.7 0.34 J Molybdenum 7439-98-7 T 160 /L 22 21.4 23.7 23.6 22.7 6.6 1.4 8.8 5.4 1.2 0.82 0.48 J Nickel 7440-02-0 D 16 /L 2.9 3.7 1.5 J+ 2.8 7 1.3 1.1 0.3 J 0.4 J 0.47 J 0.4 J 0.45 J Nickel 7440-02-0 T 25 100 /L 3.1 4.1 3 3.2 J+ 4.4 1.3 1.6 J+ 0.2 J 0.5 J 0.35 J 0.56 0.55 Potassium 7440-09-7 T /L 7230 6960 6910 6700 6810 5390 4080 J 5160 6310 5000 U 5000 U 5000 U Selenium 7782-49-2 D /L 6.5 6.4 5.9 7.7 6.3 3 0.7 5.1 2.1 0.74 0.46 J 0.54 Selenium 7782-49-2 T 5 20 pg/L 5.9 6.4 6.7 7.9 7.1 3 0.83 4.5 2.1 0.7 0.58 0.59 Sodium 7440-23-5 T /L 13400 12500 13000 11600 11700 13000 3850J 14400 7820 9700 8890 6490 Strontium 7440-24-6 D /L 850 820 930 870 870 580 120 550 300 120 98 43 Strontium 7440-24-6 T 14000 /L 840 820 900 900 860 610 120 560 280 120 110 45 Thallium 7440-28-0 D /L 1.2 1.3 1.1 0.94 1.6 0.35 0.18 0.07 J+ 0.068 J 0.027 J 0.036 J 0.05 J Thallium 7440-28-0 T 0.24 0_2 pg/L 1.4 113 13 0.98 1.3 0.34 0.21 0.065 J 0.067 J 0.036 J 0.041 J 0.061 J Vanadium 7440-62-2 D /L 4.2 4.1 6 9.5 4.2 0.57 J 0.54 J 0.58 J 0.67 J 1 U 0.29 J 1 U Vanadium 7440-62-2 T 0.3 /L 4.1 3.8 9.2 10.6 8.4 0.89 J 1.7 0.52 J 1.5 1 U 0.32 J 1 U Zinc 7440-66-6 D 36 /L 10 U 10 U 12 J+ 2.9 J 13 10 U 6.8 J 10 U 10 U 10 U 10 U 10 U Zinc 7440-66-6 T - 1000 /L 2.7 J 10 U 5.9 J 5.3 J 17 3 J 12 3.6 J 8.1 J 4 J 35 3.9 J Total Dissolved Solids TDS N 500000 500000 pg/L 1300000 1200000 1930000 1190000 1120000 360000 139000 443000 231000 87000 85000 48000 Total Organic Carbon TOC N - /L 4200 5700 4200 4000 4300 7500 18400 4400 7600 3900 5700 5400 Total Suspended Solids TSS N /L 5000 U 5700 20400 4800 5100 3000 J 1 30300 2500 U 6900 1700 2500 U 2900 Alkalinity, CO3 ALK-CO3 N /L 10000 U 10000 U 5000 U 5000 U 5000 U 10000 U 5000 U 10000 U 5000 U 10000 U 5000 U 10000 U Alkalinity, HCO3 ALK-HCO3 N /L 30000 27000 27200 29600 27100 55000 7800 55000 35800 46000 40800 22000 Alkalinity, lab ALK-LAB N /L 30000 27000 28000 29600 27100 55000 7800 55000 35800 46000 40800 22000 Chloride 16887-00-6 N 230000 250000 pg/L 428000 389000 492000 492000 498000 85300 26500 81400 36900J- 6700 5500 4300 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 11 J 20 U 180 190 25 20 U 35 20 U 72 21 20 U 20 U Sulfate 14808-79-8 N 250000 250000 /L 123000 112000 118000 143000 147000 106000 19300 112000 57900J- 19700 14300 1900 Sulfide 18496-25-8 N /L 500 U 200 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 UJ 100 U Arsenic 7440-38-2 T 10 10 pg/L I - - - 11 1.58 J+ - 1.69 J+ - 5.55 J- - 1.58 - Chromium 7440-47-3 T 10 /L 1.56 J+ 1.33 J+ 1.12 J+ 0.696 1.33 Iron 7439-89-6 T 300 /L 105 691 474 422 207 Manganese 7439-96-5 D /L 58.1 341 673 33.3 6.73 Manganese 7439-96-5 T 50 /L 94.6 365 716 60.9 19.5 As III 7784-46-5 T /L 1.83 0.592 0.6 1.27 J- 0.5 UJ 0.987 J- As V 10103-60-3 T /L 1.55 10.4 0.979 J+ 0.428 J+ 5.55 0.591 Chromium VI 18540-29-9 T 0.07 /L 0.333 0.89 J 0.02 UJ 0.019 J 0.024 J 0.043 J- Fe II 1345-25-1 T /L 12.1 J+ 30.2 J+ 225 J- 159 J+ 72.4 44.3 J- Fe III 1309-37-1 T /L 2 J+ Mn II 1344-43-0 T /L 54 Page 1 of 4 Table 2-5 Ash Basin Water Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: SW-AB1 SW-AB2 SW-AB2 SW-AB2 SW-AB3 SW-AB4 SW-AB4 SW-AB5 SW-AB5 SW-AB6 SW-AB6 SW-AB7 Round 1 Round 1 Round 1 Round 2 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 6/15/2015 6/11/2015 7/20/2015 9/30/2015 9/30/2015 6/11/2015 9/30/2015 6/12/2015 9/30/2015 6/11/2015 10/1/2015 6/11/2015 N N N N N N N N N N N N SW-AB1 SW-AB2 SW-AB2 BL-SW-AB2-NS-3Q15 BL-SW-AB3-NS-3Q15 SW-AB4 BL-SW-AB4-NS-3Q15 SW-AB5 BL-SW-AB5-NS-3Q15 SW-AB6 BL-SW-AB6-NS-3Q15 SW-AB7 Constituent CAS RN Fraction SWQS Criteria Min. (for ranges only) NCDEQ 02B SWQS (Water Supply) GWQS Criteria Min. (for ranges only) NCDEQ 02L GWQS, IMACs, DHHS Unit Mn IV 1313-13-9 T p /L 14.5 Se IV 10102-18-8 T wq1L 1.52 4.6 2.93 2 U 2 U 2 U Se VI 13410-01-0 T pq1L 1.23 1.82 J- 1.41 J- 2 UJ 0.914 J 2 UJ Dissolved Oxygen DO N m /L 6.03 5.8 6.06 5.26 6.44 3.45 3.81 9.35 6 8.51 6.15 6.11 Temperature TEMP N Deg C 34.2 31.5 32.8 23.4 23.7 31 20.7 29.3 26.4 18.9 20.3 28.5 H PH N 6 9 6.5 8.5 SU 8.05 8.02 8.26 7.5 6.42 6.94 7 8.28 6.8 8.28 8.14 7.39 Turbidity, field TURB N - - NTU 2.7 3 11.96 5.26 5.78 1.9 29.84 1 11.7 1.9 1.85 3.5 Specific Conductivity field Sc NPS/cm 1810 1770 1690 1867 1815 620 229.8 610 357.6 163 240.5 65 Oxidation Reduction Potential ORP N mV 122 197 197.5 165.8 98.5 202 141.1 152 29.6 189 63.3 200.8 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 2 of 4 Table 2-5 Ash Basin Water Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: SW-AB7 SW-AB8 SW-AB8 SW-AB9 SW-AB9 SW-10 Round 2 Round 1 Round 2 Round 1 Round 2 Round 2 9/30/2015 6/10/2015 9/30/2015 6/15/2015 9/30/2015 9/30/2015 N N N N N N BL-SW-AB7-NS-3Q15 SW-AB8 BL-SW-AB8-NS-3Q15 SW-AB9 BL-SW-AB9-NS-3Q15 BL-SW-10-NS-3Q15 Constituent CAS RN Fraction SWQS Criteria Min. (for ranges only) NCDEQ 02B SWQS (Water Supply) GWQS Criteria Min. (for ranges only) NCDEQ 02L GWQS, IMACs, DHHS Unit Aluminum 7429-90-5 D - /L 100 U 131 130 7.2 J 100 U 100 U Aluminum 7429-90-5 T 87 Ng/L 100 47.2 320 10.1 100 U 240 Antimony 7440-36-0 D I - I pq/L 0.5 U 0.5 U 0.5 U 0.15 J 0.5 U 0.5 U Antimony 7440-36-0 T 5.6 1 /L 0.5 U 0.5 U 0.5 U 0.16 J 0.5 U 0.5 U Arsenic 7440-38-2 D 150 /L 2 0.46 J 0.45 J 4.3 3.2 1.5 Arsenic 7440-38-2 T 10 10 Ng/L 3.4 0.58 0.57 4.4 3.5 3.2 Barium 7440-39-3 D /L 29 8.7 17 100 96 78 Barium 7440-39-3 T 1000 700 /L 31 9.6 17 110 98 82 Beryllium 7440-41-7 D 6.5 /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.4 Beryllium 7440-41-7 T 4 /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.54 Boron 7440-42-8 D /L 51 57 48 J 96 85 1400 Boron 7440-42-8 T 700 /L 59 J+ 65 59 J+ 120 99 J+ 1300 Cadmium 7440-43-9 D 0.15 - Ng/L 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.12 Cadmium 7440-43-9 T 2 /L 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.13 Calcium 7440-70-2 T /L 1490 3550 2450 9630 8820 24500 Chromium 7440-47-3 D 11 /L 0.34 J 7.7 5.2 0.5 U 0.21 J 0.5 U Chromium 7440-47-3 T 10 /L 0.54 7.5 5.5 0.17 J 0.21 J 0.34 J+ Cobalt 7440-48-4 D /L 0.33 J 0.5 U 0.27 J 0.5 U 0.5 U 50.4 Cobalt 7440-48-4 T 3 1 Ng/L 0.44 J 0.5 U 0.48 J 0.5 U 0.5 U 54 Copper 7440-50-8 D 2.7 - Ng/L 1.2 0.48 J+ 0.67 J 1.4 8.9 0.96 J Copper 7440-50-8 T 1000 /L 0.8 J 0.46 J 0.78 J 0.25 J 0.48 J 1.8 J+ Iron 7439-89-6 D /L 250 308 210 81.1 50 U 2100 Iron 7439-89-6 T 300 /L 760 860 870 161 190 5200 Lead 7439-92-1 D 0.54 - pg/L 0.055 J 0.1 U 0.069 J 0.1 U 1 0.1 U Lead 7439-92-1 T 15 /L 0.12 0.085 J 0.39 0.1 UJ 0.055 J 0.63 J+ Magnesium 7439-95-4 T /L 1 1220 1690 1140 3810 3400 9300 Manganese 7439-96-5 D /L 65 10 58 6.1 24 3600 Manganese 7439-96-5 T 50 /L 76 28 73 28 43 3700 Mercury 7439-97-6 D /L 0.2 U Mercury 7439-97-6 T 0.012 1 /L 0.003 J+ 0.001 U 0.00342 0.000549 0.00102 J+ 0.00609 Methane 74-82-8 N /L 57.5 J 13 3.8 J 13 12.3 J 313 J+ Molybdenum 7439-98-7 D /L 0.31 J 1.7 1.9 3.1 2.9 0.5 U Molybdenum 7439-98-7 T 160 /L 0.3 J 1.7 2 3.1 2.5 0.11 J Nickel 7440-02-0 D 16 /L 0.54 6.8 6.7 0.37 J 0.48 J 6.2 Nickel 7440-02-0 T 25 100 /L 0.75 6.8 16.7 0.36 J 0.26 J 6.7 Potassium 7440-09-7 T /L 5000 U 5000 U 5000 U 3670 J 3380 J 5450 Selenium 7782-49-2 D /L 0.46 J 0.47 J 0.57 0.3 J 0.5 U 0.5 U Selenium 7782-49-2 T 5 20 Ng/L 0.49 J 0.44 J 0.54 0.28 J 0.5 U 0.5 U Sodium 7440-23-5 T /L 4480 J 4120 J 2760 J 7100 6050 7360 Strontium 7440-24-6 D /L 24 31 27 110 93 100 Strontium 7440-24-6 T 14000 /L 24 32 26 110 91 100 Thallium 7440-28-0 D /L 0.058 J 0.089 J 0.12 0.017 J 0.1 U 0.19 Thallium 7440-28-0 T 0.24 0.2 Ng/L 0.059 J 0.096 J 0.13 0.034 J+ 0.039 J 0.21 Vanadium 7440-62-2 D /L 1 U 1 U 0.33 J 1.5 0.89 J 1 U Vanadium 7440-62-2 T 0.3 /L 0.46 J 1 U 0.48 J 1.7 0.71 J 0.44 J Zinc 7440-66-6 D 36 /L 10 U 10 U 10 U 10 U 10 U 9.9 J Zinc 7440-66-6 T 1000 /L 10 U 10 U 10 U 3.7 J 10 U 11 Total Dissolved Solids TDS N 500000 500000 pg/L 25000 U 10000 U 40000 89000 77000 219000 Total Organic Carbon TOC N /L 7800 5600 6100 2400 2100 4100 Total Suspended Solids TSS N /L 3400 2200 5800 2500 U 5800 19500 Alkalinity, CO3 ALK-CO3 N /L 5000 U 10000 U 5000 U 10000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 11000 10000 U 3600 J 38000 31700 11600 Alkalinity, lab ALK-LAB N /L 11000 10000 U 3600 J 38000 31700 11600 Chloride 16887-00-6 N 230000 250000 pg/L 2900 J- 5500 3600 J- 7800 7000 J- 70700 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 20 U 20 U 25 20 U 56 530 Sulfate 14808-79-8 N 250000 250000 /L 3000 J- 4400 4600 J- 9600 9800 J- 11800 Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 10 pg/L 0.234 J- - 0.318 J- - - 1.31 J+ Chromium 7440-47-3 T 10 /L 0.397 J 5.23 0.52 J+ Iron 7439-89-6 T 300 /L 872 629 4590 Manganese 7439-96-5 D /L 49.7 45.5 4010 Manganese 7439-96-5 T 50 /L 70.2 66.1 4280 As III 7784-46-5 T /L 0.438 J- 0.5 UJ 0.99 0.956 As V 10103-60-3 T /L 0.5 U 0.318 J 1.38 0.355 J+ Chromium VI 18540-29-9 T 0.07 /L 0.011 J 0.03 J 0.03 0.02 UJ Fe II 1345-25-1 T /L 143 72.4 41.1 2180 J- Fe III 1309-37-1 T /L 43.5 J+ Mn II 1344-43-0 T /L 1.6 J+ Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 3 of 4 Table 2-5 Ash Basin Water Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: SW-AB7 SW-AB8 SW-AB8 SW-AB9 SW-AB9 SW-10 Round 2 Round 1 Round 2 Round 1 Round 2 Round 2 9/30/2015 6/10/2015 9/30/2015 6/15/2015 9/30/2015 9/30/2015 N N N N N N BL-SW-AB7-NS-3Q15 SW-AB8 BL-SW-AB8-NS-3Q15 SW-AB9 BL-SW-AB9-NS-3Q15 BL-SW-10-NS-3Q15 Constituent CAS RN Fraction SWQS Criteria Min. (for ranges only) NCDEQ 02B SWQS (Water Supply) GWQS Criteria Min. (for ranges only) NCDEQ 02L GWQS, IMACs, DHHS Unit Mn IV 1313-13-9 T p /L 23.2 Se IV 10102-18-8 T /L 2 U 2 U 0.5 U 2 U Se VI 13410-01-0 T /L 2 U 2 U 0.5 U 2 UJ Dissolved Oxygen DO N m /L 7.4 7.31 7 6.91 7.7 3.72 Temperature TEMP N Deg C 24.6 31 25 32.1 23.9 23 H PH N 6 9 6.5 8.5 SU 6.7 7.5 6.7 8.28 6.6 6.3 Turbidity, field TURB N - - NTU 6.7 1.5 10.4 1.2 3 21 Specific Conductivityfield SC N PS/cm 43.2 67 47.4 126 115.9 367.2 Oxidation Reduction Potential ORP N mV 31.1 313 34 114 26 54.2 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 4 of 4 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: BC-23A BC-28 BG-1 D BG-1 D BG-1 D BG-1 D BG-2BR 4Q2015_BGWells_Part_II 4012015_BGWells_Part_II SI Sampling 3012015_BGWells 4Q2015_BGWells_Part_I 4Q2015_BGWells_Part_II SI Sampling Round 4 Round 4 Round 1 Round 2 Round 3 Round 4 Round 1 12/16/2015 12/16/2015 7/14/2015 9/29/2015 11/12/2015 12/16/2015 7/9/2015 N N N N N N N BL-BC-23A-NS-4Q15-2 BL-BC-28-NS-4Q15-2 BG-1D BL-BG-ID-NS-3Q15 BL-BG-ID-NS-4Q15-1 BL-BG-ID-NS-4Q15-2 BG-2BR Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D /L 100 U 100 U 100 U 100 U 100 U 100 U 130 Aluminum 7429-90-5 T /L 160 220 140 100 U 57 J 100 U 150 Antimony 7440-36-0 D /L 0.5 U 0.5 U 0.27 J 0.95 0.23 J 0.5 U 0.62 Antimony 7440-36-0 T 1 IMAC Ng/L 0.5 U 0.5 U 1.5 0.21 J 0.5 U 0.5 U 0.6 Arsenic 7440-38-2 D /L 0.5 U 0.5 U 0.16 J 0.5 U 0.13 J 0.17 J 1.9 Arsenic 7440-38-2 T 10 02L /L 0.5 U 0.5 U 0.46 J 0.5 U 0.12 J 0.5 U 1.9 Barium 7440-39-3 D /L 29 J+ 26 5 U 3.5 J 2.6 J 4.7 J 7.2 Barium 7440-39-3 T 700 02L /L 34 31 4.1 J 3.1 J 4 J 7.2 7.7 Beryllium 7440-41-7 D /L 0.078 J 0.094 J 0.2 U 0.2 U 0.2 U 0.1 J 0.2 U Beryllium 7440-41-7 T 4 IMAC /L 0.076 J 0.095 J 0.2 U 0.2 U 0.2 U 0.26 0.2 U Boron 7440-42-8 D /L 50 U 50 U 50 U 50 U 50 U 50 U 36 J+ Boron 7440-42-8 T 700 02L /L 50 U 50 U 50 U 29 J 50 U 50 U 50 U Cadmium 7440-43-9 D /L 0.08 U 0.08 U 0.16 0.056 J 0.077 J 0.059 J 0.042 J Cadmium 7440-43-9 T 2 02L /L 0.08 U 0.025 J 0.2 0.06 J 0.077 J 0.079 J 0.14 Calcium 7440-70-2 T /L 1520 4070 5410 3460 3540 4080 26600 Chromium 7440-47-3 D /L 0.55 0.52 0.26 J 0.25 J 0.58 J+ 0.2 J 1.8 J+ Chromium 7440-47-3 T 10 02L /L 0.92 J+ 0.78 J+ 2.7 0.22 J+ 1.1 J+ 0.5 U 3.6 J+ Cobalt 7440-48-4 D /L 0.5 U 0.5 U 1.8 1.9 1.9 1.5 0.5 U Cobalt 7440-48-4 T 1 IMAC Ng/L 0.5 U 0.55 0.9 2 1.8 1.6 0.5 U Copper 7440-50-8 D /L 0.37 J 11.6 10.5 0.28 J 2.2 J+ 4.3 0.62 J+ Copper 7440-50-8 T 1000 02L /L 0.32 J+ 2.4 1.8 0.3 J+ 0.23 J 8.8 0.77 J Iron 7439-89-6 D /L 50 U 50 U 50 U 50 U 50 U 50 U 50 U Iron 7439-89-6 T 300 02L Ng/L 210 230 100 38 J 100 36 J 83 Lead 7439-92-1 D /L 0.1 U 1.2 0.99 0.1 U 0.24 J+ 0.14 0.1 U Lead 7439-92-1 T 15 02L /L 0.1 U 0.23 0.26 0.05 J+ 0.11 0.1 U 0.056 J Magnesium 7439-95-4 T /L 849 1340 2200 2040 2120 2210 2550 Manganese 7439-96-5 D /L 5 U 5 U 120 69 54 45 5 U Manganese 7439-96-5 T 50 02L N /L 5.3 23 93 73 57 55 2.7 J Mercury 7439-97-6 D /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N /L 1.5 J+ 1.6 J+ 24.3 1.5 J+ 1.6 J+ 1.7 J+ 1.6 J+ Molybdenum 7439-98-7 D /L 0.14 J 0.26 J 0.34 J 1.1 0.14 J 0.37 J 8.8 Molybdenum 7439-98-7 T /L 0.16 J 0.29 J 1.1 0.44 J 0.14 J 1 8.8 Nickel 7440-02-0 D /L 0.41 J 0.7 3.4 4.3 5.2 4 0.63 J+ Nickel 7440-02-0 T 100 02L /L 0.46 J 0.72 3.5 4.1 5.4 4 1.7 J+ Potassium 7440-09-7 T /L 5000 U 5000 U 3300 J 5000 U 5000 U 5000 U 11100 Selenium 7782-49-2 D /L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1.1 Selenium 7782-49-2 T 20 02L /L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1.1 Sodium 7440-23-5 T /L 5860 4960J 11500 6570 6940 6330 9810 Strontium 7440-24-6 D /L 17 J+ 32 32 36 30 37 130 Strontium 7440-24-6 T /L 19 36 49 33 32 46 130 Thallium 7440-28-0 D /L 0.1 U 0.055 J 0.043 J 0.058 J 0.061 J 0.05 J 0.1 U Thallium 7440-28-0 T 0.2 IMAC /L 0.1 U 0.067 J 0.024 J 0.056 J 0.059 J 0.056 J 0.1 U Vanadium 7440-62-2 D /L 0.91 J 0.88 J 0.29 J 1 U 1 U 0.86 J 7.2 Vanadium 7440-62-2 T 0.3 IMAC Ng/L 1 U 0.38 J 0.75 J 1 U 1 U 1 U 7.4 Zinc 7440-66-6 D /L 2.8 J+ 2.7 J 10 U 13 31 57 3.7 J+ Zinc 7440-66-6 T 1000 02L /L 10 U 4.8 J 7.7 J+ 8.5 J 22 62 2.7 J Total Dissolved Solids TDS N 500000 02L /L 59000 75000 88000 63000 83000 74000 149000 Total Organic Carbon TOC N /L 1000 U 590 J 660 J 1000 U 1000 U 1000 U 970 J Total Suspended Solids TSS N /L 6500 2900 20900 2500 U 2500 U 2500 U 7200 Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 4600 J Alkalinity, HCO3 ALK-HCO3 N /L 16300 21300 23800 12100 12100 13100 59600 Alkalinity, lab ALK-LAB N /L 16300 21300 23800 J- 12100 12100 13100 64100 Chloride 16887-00-6 N 250000 02L /L 2400 1800 7800 7200 7100 7000 6600 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 20 U 1100 830 1300 1300 1200 95 Sulfate 14808-79-8 N 250000 02L /L 1000 U 1000 U 10500 5100 4500 4700 23400 Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L /L 0.5 U Chromium 7440-47-3 T 10 02L /L 1.12 J+ Iron 7439-89-6 T 300 02L N /L 180 Manganese 7439-96-5 D /L 55.2 Manganese 7439-96-5 T 50 02L Ng/L 54.4 As III 7784-46-5 T /L 0.209 J+ As V 10103-60-3 T /L 1 0.5 U Chromium VI 18540-29-9 D 0.07 DHHS I ug/L I - - - - - - Chromium VI 18540-29-9 T 0.07 DHHS N /L 0.34 0.49 0.02 U 0.096 0.039 Fe II 1345-25-1 T /L 30 UJ Page 1 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: BC-23A BC-28 BG-1 D BG-1 D BG-1 D BG-1 D BG-21BR 4Q2015_BGWells_Part_II 4012015_BGWells_Part_II SI Sampling 3012015_BGWells 4Q2015_BGWells_Part_I 4Q2015_BGWells_Part_II SI Sampling Round 4 Round 4 Round 1 Round 2 Round 3 Round 4 Round 1 12/16/2015 12/16/2015 7/14/2015 9/29/2015 11/12/2015 12/16/2015 7/9/2015 N N N N N N N BL-BC-23A-NS-4Q15-2 BL-BC-28-NS-4Q15-2 BG-1D BL-BG-ID-NS-3Q15 BL-BG-ID-NS-4Q15-1 BL-BG-ID-NS-4Q15-2 BG-21BR Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se IV 10102-18-8 T /L 2 U Se VI 13410-01-0 T /L 2 U Uranium, Natural 7440-61-1 T /L 0.081 J Radium-226 13982-63-3 T Ci/L 1.9 Radium-228 15262-20-1 T Ci/L 4.66 J+ Uranium-233 13968-55-3 T /L 0.05 U Uranium-234 13966-29-5 T pg/L 0.05 U Uranium-236 13982-70-2 T /L 0.05 U - - Dissolved Oxygen DO N m /L 7.1 6.51 4.43 5.04 3.98 6.98 1.04 Temperature TEMP N Deg C 16.1 14.8 23.4 22.4 16.9 13.2 27.4 pH PH N 6.5 8.5 02L SU 6 5.72 6.3 5.8 5.73 5.9 9.04 Turbidity, field TURB N NTU 1 6.54 7.4 2.1 1.33 3.4 8.54 Specific Conductivity field Sc N S/cm 43.5 51.2 126.2 84.6 1 80.3 81.6 235.1 Oxidation Reduction Potential ORP N I mV 230.4 224.9 162.4 150.8 1 87.6 1 190 159.9 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 2 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: BG-2BR BG-21BR BG-2BR BG-2D BG-2D BG-2D BG-2D 3Q2015_BGWells 4Q2015_BGWells_Part _I 4Q2015_BGWells_Part II SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part _I 4Q2015_BGWells_Part _II Round 2 Round 3 Round 4 Round 1 Round 2 Round 3 Round 4 9/29/2015 11/12/2015 12/16/2015 7/9/2015 9/29/2015 11/12/2015 12/16/2015 N N N N N N N BL-BG-21BR-NS-3Q15 BL-BG-2BR-NS-4Q15-1 BL-BG-2BR-NS-4Q15-2 BG-2D BL-BG-2D-NS-3Q15 BL-BG-2D-NS-4Q15-1 BL-BG-2D-NS-4Q15-2 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D /L 180 140 170 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T /L 210 310 240 78 J 100 U 100 U 100 U Antimony 7440-36-0 D /L 2.2 1.6 1.5 0.32 J 0.83 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC Ng/L 1.4 1.3 1.5 0.25 J 0.49 J 0.19 J 0.5 U Arsenic 7440-38-2 D /L 2.2 2.1 1.6 0.17 J 0.12 J 0.5 U 0.12 J Arsenic 7440-38-2 T 10 02L /L 1.7 1.9 1.7 0.2 J 0.5 U 0.5 U 0.5 U Barium 7440-39-3 D /L 6.9 7.5 11 7.4 6.9 8.4 5.1 Barium 7440-39-3 T 700 02L /L 8.1 9.4 13 7.8 6.8 10 6.6 Beryllium 7440-41-7 D /L 0.2 U 0.2 U 0.081 J 0.2 U 0.2 U 0.2 U 0.2 U Beryllium 7440-41-7 T 4 IMAC /L 0.2 U 0.2 U 0.46 0.2 U 0.2 U 0.2 U 0.2 U Boron 7440-42-8 D /L 50 U 50 U 50 U 40 J+ 50 U 50 U 50 U Boron 7440-42-8 T 700 02L /L 50 U 50 U 50 U 50 U 50 U 50 U 50 U Cadmium 7440-43-9 D /L 0.031 J 0.08 U 0.08 U 0.11 0.032 J 0.08 U 0.027 J Cadmium 7440-43-9 T 2 02L /L 0.056 J 0.088 0.036 J 0.059 J 0.039 J 0.027 J 0.08 U Calcium 7440-70-2 T /L 24800 30000 24000 11400 11700 12400 11700 Chromium 7440-47-3 D /L 1 2.6 J+ 0.67 0.46 J+ 1.5 0.53 J+ 0.24 J Chromium 7440-47-3 T 10 02L /L 0.94 J+ 6.1 1 J+ 2.6 J+ 1.1 J+ 1.8 J+ 1 J+ Cobalt 7440-48-4 D /L 0.5 U 0.5 U 0.5 U 0.14 J 0.5 U 0.19 J 0.13 J Cobalt 7440-48-4 T 1 IMAC Ng/L 0.5 U 0.2 J 0.5 U 0.28 J 0.5 U 0.19 J 0.5 U Copper 7440-50-8 D /L 0.83 J 4.4 J+ 3.9 5.5 1 U 0.38 J+ 4.7 J+ Copper 7440-50-8 T 1000 02L /L 0.95 J+ 1.3 26.7 1 U 0.24 J+ 0.26 J 1 U Iron 7439-89-6 D /L 50 U 50 U 50 U 50 U 50 U 50 U 50 U Iron 7439-89-6 T 300 02L Ng/L 40 J 550 120 72 27 J 75 28 J Lead 7439-92-1 D /L 0.1 U 0.36 J+ 0.1 U 0.52 0.1 U 0.1 UJ 0.47 J+ Lead 7439-92-1 T 15 02L /L 0.1 UJ 0.17 0.1 U 0.097 J 0.1 UJ 0.1 U 0.1 U Magnesium 7439-95-4 T /L 1660 1690 1540 5960 5860 6220 6060 Manganese 7439-96-5 D /L 5 U 5 U 5 U 11 4 J 3.9 J 5 U Manganese 7439-96-5 T 50 02L N /L 5 U 12 2.6 J 12 3.9 J 5.5 5 U Mercury 7439-97-6 D /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N /L 1.7 J+ 3 J+ 1.4 J+ 2.6 J+ 1.6 J+ 2.5 J+ 2 J+ Molybdenum 7439-98-7 D /L 11.6 10.5 10.5 1.4 1.1 1 0.69 Molybdenum 7439-98-7 T /L 8.6 9.2 10.5 1.4 0.82 0.93 0.67 Nickel 7440-02-0 D /L 0.43 J+ 1.2 0.23 J 0.66 J+ 1 J+ 1.6 0.68 Nickel 7440-02-0 T 100 02L /L 0.44 J 5.1 0.5 1.5 J+ 0.58 2.3 0.77 Potassium 7440-09-7 T /L 12200 12200 10700 5000 U 5000 U 5000 U 5000 U Selenium 7782-49-2 D /L 1.2 1 0.94 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L /L 1.1 0.74 0.72 0.5 U 0.21 J 0.5 U 0.5 U Sodium 7440-23-5 T /L 10700 10400 10200 7540 6630 6560 6380 Strontium 7440-24-6 D /L 190 200 230 38 37 35 34 Strontium 7440-24-6 T /L 210 170 240 40 36 34 36 Thallium 7440-28-0 D /L 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U Thallium 7440-28-0 T 0.2 IMAC /L 0.054 J 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U Vanadium 7440-62-2 D /L 11.4 10 8.5 1.2 1.1 1.2 1.9 J+ Vanadium 7440-62-2 T 0.3 IMAC Ng/L 9 7.8 7.9 1.4 0.96 J 1 J 1 Zinc 7440-66-6 D /L 10 U 5 J 6.4 J 12 J+ 6.9 J 8.2 J 16 Zinc 7440-66-6 T 1000 02L /L 3.1 J 13 34 5.8 J 11 6.9 J 6.5 J+ Total Dissolved Solids TDS N 500000 02L /L 171000 121000 145000 107000 109000 138000 120000 Total Organic Carbon TOC N /L 790 J 1000 1100 1000 U 1000 U 1000 U 7800 Total Suspended Solids TSS N /L 2500 U 2500 U 2500 U 5900 2500 U 2500 U 2500 U Alkalinity, CO3 ALK-CO3 N /L 20800 11400 28000 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 41600 55800 38700 47200 46100 49800 49000 Alkalinity, lab ALK-LAB N /L 62400 J- 67200 66700 47200 46100 J- 49800 49000 Chloride 16887-00-6 N 250000 02L /L 5800 4800 4700 9700 9000 8700 9200 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 190 150 J+ 160 650 610 610 610 Sulfate 14808-79-8 N 250000 02L /L 24500 24300 21900 3200 4000 4300 3200 Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L /L 1.98 0.207 J Chromium 7440-47-3 T 10 02L /L 1.53 J+ 1.09 J+ Iron 7439-89-6 T 300 02L N /L 58.3 J+ 140 J+ Manganese 7439-96-5 D /L 0.524 J+ 3.33 J+ Manganese 7439-96-5 T 50 02L Ng/L 1.89 J+ 6.38 As III 7784-46-5 1 T /L 0.209 J+ 0.031 J+ As V 10103-60-3 T /L 1.77 0.175 J Chromium VI 18540-29-9 D 0.07 DHHS ug/L - - - - - - Chromium VI 18540-29-9 T 0.07 DHHS N /L 0.7 0.4 J+ 0.6 0.12 0.12 J+ 0.15 Fe II 1345-25-1 T /L 67.7 J- 30 UJ Page 3 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: BG-2BR BG-21BR BG-21BR BG-2D BG-2D BG-2D BG-2D 3Q2015_BGWelis 4Q2015_BGWells_Part _I 4Q2015_BGWells_Part _II SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part _I 4Q2015_BGWells_Part 11 Round 2 Round 3 Round 4 Round 1 Round 2 Round 3 Round 4 9/29/2015 11/12/2015 12/16/2015 7/9/2015 9/29/2015 11/12/2015 12/16/2015 N N N N N N N BL-BG-21BR-NS-3Q15 BL-BG-2BR-NS-4Q15-1 BL-BG-2BR-NS-4Q15-2 BG-2D BL-BG-2D-NS-3Q15 BL-BG-2D-NS-4Q15-1 BL-BG-2D-NS-4Q15-2 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se IV 10102-18-8 T /L 2 U 2 U Se VI 13410-01-0 T /L 0.965 J+ 2 UJ Uranium, Natural 7440-61-1 T /L Radium-226 13982-63-3 T Ci/L Radium-228 15262-20-1 T Ci/L Uranium-233 13968-55-3 T /L Uranium-234 13966-29-5 T /L Uranium-236 13982-70-2 T /L Dissolved Oxygen DO N m /L 1.9 0.88 3.81 2.96 2.8 2.59 2.6 Temperature TEMP N Deg C 20.9 17.5 12.8 26.5 22.1 17.6 13.9 pH PH N 6.5 8.5 02L SU 9.2 9.43 9.7 6.52 6.7 6.48 6.6 Turbidit , field TURB N NTU 4.9 9.84 10 9.25 1.5 4.06 2.4 S ecific Conductivityfield Sc N PS/cm 210.1 210.9 201 156.1 146.3 145.9 145.9 Oxidation Reduction Potential ORP N mV 1 7.1 -47.5 22.5 181.7 100.4 149.5 176.8 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 4 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: BG-2S BG-2S BG-2S BG-2S BG-3D BG-3D BG-3D SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part _I 4Q2015_BGWells_Part_II SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part_I Round 1 Round 2 Round 3 Round 4 Round 1 Round 2 Round 3 7/9/2015 9/29/2015 11/12/2015 12/16/2015 7/18/2015 9/30/2015 11/12/2015 N N N N N N N BG-2S BL-BG-2S-NS-3Q15 BL-BG-2S-NS-4Q15-1 BL-BG-2S-NS-4Q15-2 BG-3D BL-BG-3D-NS-3Q15 BL-BG-3D-NS-4Q15-1 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T /L 410 200 1000 91 J 2200 100 U 81 J Antimony 7440-36-0 D /L 0.5 U 1 0.5 U 0.5 U 0.5 U 0.69 0.5 U Antimony 7440-36-0 T 1 IMAC Ng/L 0.5 U 0.3 J 0.5 U 0.5 U 0.16 J 0.29 J 0.5 U Arsenic 7440-38-2 D /L 0.5 U 0.5 U 0.5 U 0.5 U 0.32 J 0.12 J 0.5 U Arsenic 7440-38-2 T 10 02L /L 0.5 U 0.5 U 0.5 U 0.5 U 0.43 J 0.5 U 0.5 U Barium 7440-39-3 D /L 51 58 110 100 5 U 6.7 6.5 Barium 7440-39-3 T 700 02L /L 60 61 110 110 51 9.1 10 Beryllium 7440-41-7 D /L 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Beryllium 7440-41-7 T 4 IMAC /L 0.2 U 0.2 U 0.2 U 0.07 J 0.33 0.2 U 0.2 U Boron 7440-42-8 D /L 50 U 50 U 50 U 50 U 50 U 26 J 50 U Boron 7440-42-8 T 700 02L /L 50 U 50 U 50 U 50 U 50 U 50 U 50 U Cadmium 7440-43-9 D /L 0.35 0.04 J 0.053 J 0.043 J 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T 2 02L /L 0.41 0.036 J 0.05 J 0.035 J 0.08 U 0.08 U 0.08 U Calcium 7440-70-2 T /L 1920 1700 3340 4920 6570 4410 4390 Chromium 7440-47-3 D /L 1.3 J+ 2.2 1.9 J+ 1.4 0.29 J+ 0.27 J 0.36 J+ Chromium 7440-47-3 T 10 02L /L 1.1 J+ 1.7 J+ 1.8 J+ 5.4 0.77 J+ 0.51 J+ 0.25 J+ Cobalt 7440-48-4 D /L 0.19 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Cobalt 7440-48-4 T 1 IMAC Ng/L 0.19 J 0.13 J 0.2 J 0.5 U 0.23 J 0.5 U 0.5 U Copper 7440-50-8 D /L 0.7 J+ 0.6 J 1.7 J+ 5.2 J+ 0.71 J+ 1 U 9.1 J+ Copper 7440-50-8 T 1000 02L /L 0.46 J 0.58 J+ 0.52 J 0.45 J+ 1.2 J+ 0.5 J 0.24 J Iron 7439-89-6 D /L 50 U 50 U 50 U 34 J 50 U 50 U 50 U Iron 7439-89-6 T 300 02L Ng/L 650 300 1600 120 1900 44 J 77 Lead 7439-92-1 D /L 0.1 U 0.1 U 0.16 J+ 0.41 J+ 0.1 U 0.069 J 1.1 J+ Lead 7439-92-1 T 15 02L /L 0.1 U 0.12 0.24 0.1 U 1.5 0.14 J+ 0.11 Magnesium 7439-95-4 T /L 1280 1180 2400 3150 2490 1770 1770 Manganese 7439-96-5 D /L 13 6 8 4.6 J+ 5.5 5.3 6.7 Manganese 7439-96-5 T 50 02L N /L 25 10 31 6.1 70 5.4 6.6 Mercury 7439-97-6 D /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N /L 1.8 J+ 1.6 J+ 1.4 J+ 1.3 J+ 1.2 J+ 1.1 J+ 2.3 J+ Molybdenum 7439-98-7 D /L 0.1 J 0.28 J 0.099 J 0.14 J 1 0.5 U 0.5 U Molybdenum 7439-98-7 T /L 0.11 J 0.12 J 0.5 U 0.22 J 0.78 0.12 J 0.5 U Nickel 7440-02-0 D /L 0.96 J+ 0.82 J+ 1.3 1.4 0.24 J 0.25 J 0.41 J Nickel 7440-02-0 T 100 02L /L 0.92 J+ 0.63 1.2 2.7 1.1 J+ 0.2 J 0.19 J Potassium 7440-09-7 T /L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Selenium 7782-49-2 D /L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L /L 0.5 U 0.5 U 0.5 U 0.5 U 0.24 J 0.5 U 0.5 U Sodium 7440-23-5 T /L 3510 J 3440 J 5060 5760 14400 6840 7010 Strontium 7440-24-6 D /L 18 21 40 38 21 48 49 Strontium 7440-24-6 T /L 18 18 31 41 70 50 49 Thallium 7440-28-0 D /L 0.025 J 0.021 J 0.02 J 0.1 U 0.1 U 0.1 U 0.1 U Thallium 7440-28-0 T 0.2 IMAC /L 0.1 U 0.025 J 0.016 J 0.1 U 0.1 U 0.1 U 0.1 U Vanadium 7440-62-2 D /L 1 U 1 U 1 U 1.2 J+ 1.2 J+ 0.62 J 0.46 J Vanadium 7440-62-2 T 0.3 IMAC Ng/L 0.31 J 0.62 J 0.87 J 0.47 J 0.94 J 0.47 J 0.34 J Zinc 7440-66-6 D /L 10 U 101 12 16 6 J+ 10 U 2.8 J Zinc 7440-66-6 T 1000 02L /L 7.3 J 7.5 J 13 23 J+ 8.1 J 3.3 J 7.1 J Total Dissolved Solids TDS N 500000 02L /L 57000 32000 62000 87000 173000 56000 48000 Total Organic Carbon TOC N /L 1000 U 1000 U 1000 U 1000 U 1000 U 1000 U 1000 U Total Suspended Solids TSS N /L 95600 6100 7000 2500 U 33100 8400 J+ 8400 Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 13400 11900 15500 20300 24300 18500 17900 Alkalinity, lab ALK-LAB N /L 13400 11900 J- 15500 20300 24300 18500 17900 Chloride 16887-00-6 N 250000 02L /L 2000 2500 J+ 9400 10200 4600 5100 5000 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 420 410 540 J+ 580 1900 2100 2100 Sulfate 14808-79-8 N 250000 02L /L 1000 U 600 J 830 J 670 J 920 J 610 J 550 J Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L /L 0.5 UJ 0.5 UJ Chromium 7440-47-3 T 10 02L /L 3.01 J+ 2.54 J+ Iron 7439-89-6 T 300 02L N /L 313 76.7 J Manganese 7439-96-5 D /L 4.87 J+ 4.76 Manganese 7439-96-5 T 50 02L Ng/L 14.6 7.9 As III 7784-46-5 T /L 0.209 J+ 0.5 UJ As V 10103-60-3 T /L 0.5 U 0.5 UJ Chromium VI 18540-29-9 D 0.07 DHHS ug/L - - - - - Chromium VI 18540-29-9 T 0.07 DHHS N /L 1.4 1.3 J+ 1.3 0.047 J 0.053 Fe II 1345-25-1 T /L 30 UJ 23.1 J+ Page 5 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: BG-2S BG-2S BG-2S BG-2S BG-3D BG-3D BG-3D SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part _I 4Q2015_BGWells_Part_II SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part_I Round 1 Round 2 Round 3 Round 4 Round 1 Round 2 Round 3 7/9/2015 9/29/2015 11/12/2015 12/16/2015 7/18/2015 9/30/2015 11/12/2015 N N N N N N N BG-2S BL-BG-2S-NS-3Q15 BL-BG-2S-NS-4Q15-1 BL-BG-2S-NS-4Q15-2 BG-3D BL-BG-3D-NS-3Q15 BL-BG-3D-NS-4Q15-1 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se IV 10102-18-8 T /L 2 U 2 U Se VI 13410-01-0 T /L 2 UJ 2 UJ Uranium, Natural 7440-61-1 T /L Radium-226 13982-63-3 T Ci/L Radium-228 15262-20-1 T Ci/L Uranium-233 13968-55-3 T /L Uranium-234 13966-29-5 T /L Uranium-236 13982-70-2 T pg/L Dissolved Oxygen DO N m /L 4.32 6.2 4.82 4.9 6.82 7 5.56 Temperature TEMP N Deg C 25.7 23.1 17.4 9.7 20 19.1 16.9 pH PH N 6.5 8.5 02L SU 5.78 5.8 5.75 6 6.19 7 6 Turbidit , field TURB N NTU 8.33 9.9 9.54 5.8 93 8.9 7.35 S ecific Conductivity field Sc NPS/cm 1 46.3 1 42.9 48.1 94.4 87 1 80.3 75.6 Oxidation Reduction Potential ORP N mV 1 277.8 1 208 203.8 192.1 104 1 180.3 184.6 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 6 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: BG-3D BG-3S BG-3S BG-3S BG-3S CRW-10 MW-202BR 4Q2015_BGWells_Part_II SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part_I 4Q2015_BGWells_Part_II 4Q2015_BGWells_Part_II SI Sampling Round 4 Round 1 Round 2 Round 3 Round 4 Round 4 Round 1 12/16/2015 7/18/2015 9/30/2015 11/17/2015 12/16/2015 12/16/2015 7/16/2015 N N N N N N N BL-BG-3D-NS-4Q15-2 BG-3S BL-BG-3S-NS-3Q15 BL-BG-3S-NS-4Q15-1 BL-BG-3S-NS-4Q15-2 BL-CRW-10-NS-4Q15-2 MW-202BR Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T /L 100 U 130 4800 60 J 150 230 80 J Antimony 7440-36-0 D /L 0.21 J 0.5 U 0.83 0.5 U 0.5 U 0.5 U 1.2 Antimony 7440-36-0 T 1 IMAC Ng/L 0.5 U 0.5 U 0.29 J 0.5 U 0.5 U 0.5 U 0.43 J Arsenic 7440-38-2 D /L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.49 J Arsenic 7440-38-2 T 10 02L /L 0.11 J 0.5 U 0.94 0.5 U 0.5 U 0.5 U 0.51 Barium 7440-39-3 D /L 6.6 37 36 33 32 14 12 Barium 7440-39-3 T 700 02L /L 9.4 40 88 36 36 17 11 Beryllium 7440-41-7 D /L 0.2 U 0.2 U 0.21 0.17 J 0.18 J 0.51 0.38 Beryllium 7440-41-7 T 4 IMAC /L 0.2 U 0.17 J 0.77 0.2 J 0.17 J 0.53 0.18 J Boron 7440-42-8 D /L 50 U 50 U 50 U 50 U 50 U 50 U 26 J Boron 7440-42-8 T 700 02L /L 50 U 50 U 50 U 50 U 50 U 50 U 37 J Cadmium 7440-43-9 D /L 0.08 U 0.035 J 0.08 U 0.029 J 0.08 U 0.035 J 0.048 J Cadmium 7440-43-9 T 2 02L /L 0.08 U 0.052 J 0.043 J 0.08 U 0.027 J 0.08 U 0.052 J Calcium 7440-70-2 T /L 4440 2080 2440 1930 2060 12400 19100 Chromium 7440-47-3 D /L 0.26 J 0.57 J+ 0.56 0.52 0.33 J 0.8 3.5 J+ Chromium 7440-47-3 T 10 02L /L 0.5 U 1.2 J+ 3.8 0.72 0.64 J+ 1.1 J+ 4.8 Cobalt 7440-48-4 D /L 0.5 U 0.52 0.28 J 0.33 J 0.22 J 0.5 U 0.5 U Cobalt 7440-48-4 T 1 IMAC Ng/L 0.5 U 0.53 1.9 0.35 J 0.24 J 0.23 J 0.5 UJ Copper 7440-50-8 D /L 6.6 2.7 J+ 0.52 J 1.9 0.8 J 1.8 4.1 J+ Copper 7440-50-8 T 1000 02L /L 0.38 J+ 1 U 4.4 1 U 0.46 J+ 0.62 J 9.7 Iron 7439-89-6 D /L 50 U 50 U 50 U 50 U 50 U 50 U 50 U Iron 7439-89-6 T 300 02L Ng/L 60 50 U 5500 81 160 400 78 Lead 7439-92-1 D /L 0.65 0.095 J+ 0.1 U 0.21 0.1 U 0.05 J 0.07 J+ Lead 7439-92-1 T 15 02L /L 0.051 J 0.066 J 4.2 0.11 0.048 J 0.1 0.068 J Magnesium 7439-95-4 T /L 1850 1310 1410 1180 1210 4320 3100 Manganese 7439-96-5 D /L 3.3 J 26 17 17 12 7.4 10 Manganese 7439-96-5 T 50 02L N /L 4.8 J 29 130 19 16 17 9.8 Mercury 7439-97-6 D /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N /L 1.8 J+ 0.85 J+ 1.3 J+ 1.3 J+ 2 J+ 1.6 J+ 1.2 J+ Molybdenum 7439-98-7 D /L 0.5 U 0.5 U 0.11 J 0.5 U 0.5 U 0.5 U 3.7 Molybdenum 7439-98-7 T /L 0.5 U 0.5 U 0.1 J 0.5 U 0.5 U 0.5 U 3.7 Nickel 7440-02-0 D /L 0.41 J 0.7 0.34 J 0.33 J 0.28 J 0.43 J 0.68 J+ Nickel 7440-02-0 T 100 02L /L 0.3 J+ 0.94 J+ 1.6 0.32 J 0.44 J+ 0.48 J 0.83 Potassium 7440-09-7 T /L 5000 U 5000 U 5000 U 5000 U 5000 U 2560 J 5150 Selenium 7782-49-2 D /L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.48 J Selenium 7782-49-2 T 20 02L /L 0.5 U 0.5 U 0.29 J 0.5 U 0.5 U 0.5 U 0.44 J Sodium 7440-23-5 T /L 7100 4770 J 4830 J 4890 J 4870 J 6480 12000 Strontium 7440-24-6 D /L 47 24 33 24 24 68 110 Strontium 7440-24-6 T /L 53 25 39 24 26 78 100 Thallium 7440-28-0 D /L 0.1 U 0.039 J 0.038 J 0.034 J 0.029 J 0.1 U 0.021 J Thallium 7440-28-0 T 0.2 IMAC /L 0.1 U 0.048 J+ 0.14 0.034 J 0.03 J 0.1 U 0.1 U Vanadium 7440-62-2 D /L 0.94 J 0.48 J+ 1 U 0.32 J 0.89 J 0.66 J 1.8 Vanadium 7440-62-2 T 0.3 IMAC Ng/L 0.7 J+ 1 U 9.2 0.38 J 0.69 J+ 0.98 J 2.3 Zinc 7440-66-6 D /L 4.6 J 15 J+ 6.4 J 14 7.9 J 14 30 Zinc 7440-66-6 T 1000 02L /L 9.1 J+ 6.9 J 33 8.1 J 6.8 J+ 2.6 J 13 Total Dissolved Solids TDS N 500000 02L /L 88000 57000 44000 25000 U 61000 111000 133000 Total Organic Carbon TOC N /L 1000 U 1000 U 1000 U 1000 U 1000 U 860 J 670 J Total Suspended Solids TSS N /L 3400 8600 37200 J+ 16000 7500 3300 2700 Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 17900 6800 7500 6500 6700 8300 77600 Alkalinity, lab ALK-LAB N /L 17900 6800 7500 6500 6700 8300 77600 Chloride 16887-00-6 N 250000 02L /L 5300 2900 3200 3800 3900 10100 2900 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 2400 3100 3100 2600 2500 700 150 Sulfate 14808-79-8 N 250000 02L /L 1000 U 1000 U 1000 U 1000 U 1000 U 37600 9600 Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L /L 0.5 UJ 0.321 J Chromium 7440-47-3 T 10 02L /L 2.47 J+ 4.4 Iron 7439-89-6 T 300 02L N /L 121 100 U Manganese 7439-96-5 D /L 14.3 9.81 Manganese 7439-96-5 T 50 02L Ng/L 23.5 11.8 As III 7784-46-5 T /L 0.5 UJ 0.155 J+ As V 10103-60-3 T /L 0.5 UJ 0.166 J Chromium VI 18540-29-9 D 0.07 DHHS ug/L - - - - - 3.2 Chromium VI 18540-29-9 T 0.07 DHHS N /L 0.091 0.22 J 0.28 0.25 0.72 J+ - Fe II 1345-25-1 T /L 11.4 J+ 30 UJ Page 7 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: BG-3D BG-3S BG-3S BG-3S BG-3S CRW-10 MW-202BR 4Q2015_BGWells_Part_II SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part_I 4Q2015_BGWells_Part_II 4Q2015_BGWells_Part_II SI Sampling Round 4 Round 1 Round 2 Round 3 Round 4 Round 4 Round 1 12/16/2015 7/18/2015 9/30/2015 11/17/2015 12/16/2015 12/16/2015 7/16/2015 N N N N N N N BL-BG-3D-NS-4Q15-2 BG-3S BL-BG-3S-NS-3Q15 BL-BG-3S-NS-4Q15-1 BL-BG-3S-NS-4Q15-2 BL-CRW-10-NS-4Q15-2 MW-202BR Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se IV 10102-18-8 T /L 2 U 2 U Se VI 13410-01-0 T /L 2 UJ 0.528 J Uranium, Natural 7440-61-1 T /L 1.81 Radium-226 13982-63-3 T Ci/L 3.55 Radium-228 15262-20-1 T Ci/L 3 U Uranium-233 13968-55-3 T /L 0.05 U Uranium-234 13966-29-5 T /L 0.05 U Uranium-236 13982-70-2 T pg/L 0.05 U Dissolved Oxygen DO N m /L 6.65 7.83 5.7 3.89 6.44 6.4 4.54 Temperature TEMP N Deg C 17.1 18.14 23.5 16.0 14.6 13.4 29.3 pH PH N 6.5 8.5 02L SU 6 5.29 5.4 5.34 5.33 5.33 7.24 Turbidit , field TURB N NTU 13.45 4.02 15.4 2.42 9.38 8.61 8.03 S ecific Conductivity field Sc N t PS/cm 1 122.3 58 59 52.5 53.5 130.4 181.6 Oxidation Reduction Potential ORP N I mV 1 184.2 227.7 232.5 244.9 275.7 256.3 143.6 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 8 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: MW-202BR MW-202BR MW-202BR MW-202D MW-202D MW-202D MW-202S 3Q2015_BGWells 4Q2015_BGWells_Part _I 4Q2015_BGWells_Part_II SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part_II SI Sampling Round 2 Round 3 Round 4 Round 1 Round 2 Round 4 Round 1 10/2/2015 11/12/2015 12/16/2015 7/16/2015 10/2/2015 12/16/2015 7/16/2015 N N N N N N N BL-MW-202BR-NS-3Q15 BL-MW-202BR-NS-4Q15-1 BL-MW-202BR-NS-4Q15-2 MW-202D BL-MW-202D-NS-3Q15 BL-MW-202D-NS-4Q15-2 MW-202S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T /L 100 U 170 91 J 65 J 90 J 120 95 J Antimony 7440-36-0 D /L 0.5 U 0.5 U 0.32 J 0.99 J+ 0.5 U 0.5 U 0.39 J+ Antimony 7440-36-0 T 1 IMAC Ng/L 0.5 U 0.5 U 0.4 J 0.94 J+ 0.5 U 0.5 U 0.44 J+ Arsenic 7440-38-2 D /L 0.24 J 0.4 J 0.33 J 0.5 U 0.5 U 0.13 J 0.5 U Arsenic 7440-38-2 T 10 02L /L 0.24 J 0.16 J 0.26 J 0.5 U 0.5 U 0.5 U 0.5 U Barium 7440-39-3 D /L 5.7 3.9 J 3 J 5.8 5.4 4.8 J 20 Barium 7440-39-3 T 700 02L /L 6.2 5.9 4.4 J 5.3 5.7 6.3 19 Beryllium 7440-41-7 D /L 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Beryllium 7440-41-7 T 4 IMAC /L 0.1 J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.23 Boron 7440-42-8 D /L 50 U 50 U 50 U 50 U 50 U 50 U 50 U Boron 7440-42-8 T 700 02L /L 50 U 50 U 50 U 50 U 50 U 50 U 50 U Cadmium 7440-43-9 D /L 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T 2 02L /L 0.08 U 0.08 U 0.033 J 0.08 U 0.08 U 0.08 U 0.08 U Calcium 7440-70-2 T /L 10300 9520 8280 3930 4090 4080 1040 Chromium 7440-47-3 D /L 0.94 1.7 J+ 1.4 0.47 J+ 0.48 J 0.5 J 0.73 J+ Chromium 7440-47-3 T 10 02L /L 1.6 J+ 7 5.3 0.87 J+ 0.73 1.3 J+ 1.2 J+ Cobalt 7440-48-4 D /L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Cobalt 7440-48-4 T 1 IMAC Ng/L 0.5 U 0.33 J 0.14 J 0.5 U 0.5 U 0.5 U 0.5 U Copper 7440-50-8 D /L 7.1 0.38 J+ 7.3 0.24 J+ 0.51 J 2.6 0.38 J+ Copper 7440-50-8 T 1000 02L /L 6.5 6.7 2.8 J+ 0.59 J+ 0.34 J 0.37 J+ 0.9 J+ Iron 7439-89-6 D /L 50 U 50 U 50 U 50 U 50 U 50 U 50 U Iron 7439-89-6 T 300 02L Ng/L 51 450 130 72 130 160 68 Lead 7439-92-1 D /L 0.71 0.054 J+ 0.65 0.1 U 0.1 U 0.2 0.1 U Lead 7439-92-1 T 15 02L /L 0.053 J 0.099 J 0.052 J+ 0.067 J 0.07 J 0.057 J+ 0.1 U Magnesium 7439-95-4 T /L 3320 3060 2660 1800 2000 1920 474 Manganese 7439-96-5 D /L 6.5 5.7 4.6 J 5 U 5 U 5 U 2.6 J Manganese 7439-96-5 T 50 02L N /L 7.6 18 7.4 2.9 J 4.6 J 5.7 3.2 J Mercury 7439-97-6 D /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L /L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N /L 1.6 J+ 1.9 J+ 1.5 J+ 1.3 J+ 1.9 J+ 1.1 J+ 1.4 J+ Molybdenum 7439-98-7 D /L 2.6 2.2 1.6 0.29 J 0.36 J 0.33 J 0.5 U Molybdenum 7439-98-7 T /L 2.3 2 1.5 0.31 J 0.46 J 0.34 J 0.5 U Nickel 7440-02-0 D /L 0.8 2.8 2.9 1.2 J+ 3.4 2.8 0.18 J+ Nickel 7440-02-0 T 100 02L /L 0.98 9.4 3.2 1.1 J+ 4 2.8 0.3 J+ Potassium 7440-09-7 T /L 2700 J 2540 J 5000 U 5000 U 5000 U 5000 U 5000 U Selenium 7782-49-2 D /L 0.21 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L /L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T /L 10600 10100 9940 7980 8410 8060 5300 Strontium 7440-24-6 D /L 63 53 46 39 39 37 9.3 Strontium 7440-24-6 T /L 65 59 52 37 37 40 9.1 Thallium 7440-28-0 D /L 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U Thallium 7440-28-0 T 0.2 IMAC /L 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U Vanadium 7440-62-2 D /L 0.77 J 0.65 J 1.4 1 U 0.32 J 1.2 1 U Vanadium 7440-62-2 T 0.3 IMAC Ng/L 0.82 J 0.71 J 0.59 J 1 U 0.42 J 1 U 1 U Zinc 7440-66-6 D /L 34 10 8.5 J 6 J 10 U 11 3 J Zinc 7440-66-6 T 1000 02L /L 41 J+ 22 16 4.8 J 2.6 J 2.8 J 2.8 J Total Dissolved Solids TDS N 500000 02L /L 87000 89000 101000 71000 95000 85000 41000 Total Organic Carbon TOC N /L 1000 U 1000 U 720 J 10900 1000 U 1000 U 1000 U Total Suspended Solids TSS N /L 2500 U 3900 4000 5600 U 2500 U 5000 2500 U Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 53100 48100 42900 28900 28800 27800 14000 Alkalinity, lab ALK-LAB N /L 53100 48100 42900 28900 28800 27800 14000 Chloride 16887-00-6 N 250000 02L /L 3000 2900 2800 2000 2800 2700 1200 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 170 150 J+ 130 160 J+ 170 140 46 J+ Sulfate 14808-79-8 N 250000 02L /L 5300 5400 3900 1200 2000 1600 1000 U Sulfide 18496-25-8 N /L 100 UJ 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L /L 0.3 U 0.5 U Chromium 7440-47-3 T 10 02L /L 0.776 J+ 1.19 J+ Iron 7439-89-6 T 300 02L N /L 100 U 19.7 J Manganese 7439-96-5 D /L 2 U 0.546 J Manganese 7439-96-5 T 50 02L Ng/L 2.62 3.62 As III 7784-46-5 T /L 0.574 J+ 0.155 J+ As V 10103-60-3 T /L 0.5 U 0.5 U Chromium VI 18540-29-9 D 0.07 DHHS ug/L - - 0.13 - 0.44 Chromium VI 18540-29-9 T 0.07 DHHS N /L 0.22 0.18 - 0.28 - Fe II 1345-25-1 T /L 30 UJ 18.5 J+ Page 9 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: MW-202BR MW-202BR MW-202BR MW-202D MW-202D MW-202D MW-202S 3Q2015_BGWells 4Q2015_BGWells_Part_I 4Q2015_BGWells_Part_II SI Sampling 3Q2015_BGWells 4Q2015_BGWells_Part_II SI Sampling Round 2 Round 3 Round 4 Round 1 Round 2 Round 4 Round 1 10/2/2015 11/12/2015 12/16/2015 7/16/2015 10/2/2015 12/16/2015 7/16/2015 N N N N N N N BL-MW-202BR-NS-3Q15 BL-MW-202BR-NS-4Q15-1 BL-MW-202BR-NS-4Q15-2 MW-202D BL-MW-202D-NS-3Q15 BL-MW-202D-NS-4Q15-2 MW-202S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se IV 10102-18-8 T /L 2 U 2 U Se VI 13410-01-0 T /L 2 U 2 U Uranium, Natural 7440-61-1 T /L 0.207 J+ 0.098 J+ Radium-226 13982-63-3 T Ci/L 4.63 5.74 Radium-228 15262-20-1 T Ci/L 3 U 3 U Uranium-233 13968-55-3 T /L 0.05 U 0.05 U Uranium-234 13966-29-5 T /L 0.05 U 0.05 U Uranium-236 13982-70-2 T /L 0.05 U 0.05 U Dissolved Oxygen DO N m /L 4.1 4.6 6.68 5.8 6.4 8.23 Temperature TEMP N Deg C 14.2 15 19.41 14.1 16.1 17.83 pH PH N 6.5 8.5 02L SU 6.5 6.3 6.03 6.1 5.6 5.45 Turbidit , field TURB N NTU 4.1 7.9 9.81 4.7 0.3 6.48 S ecific Conductivity field Sc N S/cm 1 106.8 78 76.4 73.5 39 Oxidation Reduction Potential ORP N mV 16527.7.1 89.5 159.3 76.5 243.4 185.9 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 10 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: MW-202S MW-202S MW-3 3Q2015_BGWells 4012015 BGWeIIs Part II 4Q2015 BGWeIIs Part 11 Round 2 Round 4 Round 4 10/2/2015 12/16/2015 12/16/2015 N N N BL-MW-202S-NS-3Q15 BL-MW-202S-NS-4Q15-2 BL-MW-3-NS-4Q15-2 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D /L 100 U 100 U 100 U Aluminum 7429-90-5 T /L 140 320 150 Antimony 7440-36-0 D /L 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC Ng/L 0.5 U 0.5 U 0.5 U Arsenic 7440-38-2 D /L 0.5 U 0.14 J 0.12 J Arsenic 7440-38-2 T 10 02L /L 0.5 U 0.5 U 0.5 U Barium 7440-39-3 D /L 19 18 53 Barium 7440-39-3 T 700 02L /L 20 25 58 Beryllium 7440-41-7 D /L 0.23 0.17 J 0.16 J Beryllium 7440-41-7 T 4 IMAC /L 0.25 0.25 0.17 J Boron 7440-42-8 D /L 50 U 50 U 50 U Boron 7440-42-8 T 700 02L /L 50 U 50 U 50 U Cadmium 7440-43-9 D /L 0.08 U 0.08 U 0.027 J Cadmium 7440-43-9 T 2 02L /L 0.08 U 0.08 U 0.08 U Calcium 7440-70-2 T /L 1010 1060 3690 Chromium 7440-47-3 D /L 0.67 0.58 0.66 Chromium 7440-47-3 T 10 02L /L 1.3 1.7 J+ 1.2 J+ Cobalt 7440-48-4 D /L 0.5 U 0.5 U 0.5 U Cobalt 7440-48-4 T 1 IMAC Ng/L 0.28 J 0.39 J 0.18 J Copper 7440-50-8 D /L 1.2 7.8 7.3 Copper 7440-50-8 T 1000 02L /L 1.8 0.63 J+ 0.38 J Iron 7439-89-6 D /L 50 U 140 50 U Iron 7439-89-6 T 300 02L Ng/L 370 750 170 Lead 7439-92-1 D /L 0.31 0.83 0.82 Lead 7439-92-1 T 15 02L /L 0.57 0.13 J+ 0.15 Magnesium 7439-95-4 T /L 523 497 1180 Manganese 7439-96-5 D /L 2.6 J 11 5 U Manganese 7439-96-5 T 50 02L N /L 13 26 5.3 Mercury 7439-97-6 D /L 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L /L 0.2 U 0.2 U 0.2 U Methane 74-82-8 N /L 2.8 J+ 1.4 J+ 2 J+ Molybdenum 7439-98-7 D /L 0.5 U 0.5 U 0.5 U Molybdenum 7439-98-7 T /L 0.5 U 0.1 J 0.1 J Nickel 7440-02-0 D /L 0.54 0.34 J 0.42 J Nickel 7440-02-0 T 100 02L /L 0.39 J 0.56 0.73 Potassium 7440-09-7 T /L 5000 U 5000 U 5000 U Selenium 7782-49-2 D /L 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L /L 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T /L 5810 5610 3040 J Strontium 7440-24-6 D /L 8.9 8.5 36 Strontium 7440-24-6 T /L 7.9 9.6 39 Thallium 7440-28-0 D /L 0.1 U 0.1 U 0.024 J Thallium 7440-28-0 T 0.2 IMAC /L 0.1 U 0.1 U 0.023 J Vanadium 7440-62-2 D /L 1 U 0.76 J 0.47 J Vanadium 7440-62-2 T 0.3 IMAC Ng/L 0.71 J 0.67 J 0.62 J Zinc 7440-66-6 D /L 10 U 2.8 J 3.9 J Zinc 7440-66-6 T 1000 02L /L 2.5 J 3 J 5.1 J Total Dissolved Solids TDS N 500000 02L /L 45000 55000 53000 Total Organic Carbon TOC N /L 1000 U 570 J 6300 Total Suspended Solids TSS N /L 4500 8700 9400 Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 13400 13700 7600 Alkalinity, lab ALK-LAB N /L 13400 13700 7600 Chloride 16887-00-6 N 250000 02L /L 1700 1700 10300 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 40 20 U 20 U Sulfate 14808-79-8 N 250000 02L /L 640 J 1000 U 1000 U Sulfide 18496-25-8 N /L 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L /L Chromium 7440-47-3 T 10 02L /L Iron 7439-89-6 T 300 02L N /L Manganese 7439-96-5 D /L Manganese 7439-96-5 T 50 02L Ng/L As III 7784-46-5 T /L As V 10103-60-3 T /L Chromium VI 18540-29-9 D 0.07 DHHS ug/L - - Chromium VI 18540-29-9 T 0.07 DHHS N /L 0.54 0.83 Fe II 1345-25-1 T /L Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 11 of 12 Table 2-6 Background Groundwater Analytical Results - Rounds 1, 2, 3, and 4 Location: Task Event: Sample Date: Sample Type Code: Sample Name/ID: MW-202S MW-202S MW-3 3Q2015_BGWells 4012015 BGWeIIs Part11 4012015 BGWells Part 11 Round 2 Round 4 Round 4 10/2/2015 12/16/2015 12/16/2015 N N N BL-MW-202S-NS-3Q15 BL-MW-202S-NS-4Q15-2 BL-MW-3-NS-4Q15-2 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se IV 10102-18-8 T /L Se VI 13410-01-0 T /L Uranium, Natural 7440-61-1 T /L Radium-226 13982-63-3 T Ci/L Radium-228 15262-20-1 T Ci/L Uranium-233 13968-55-3 T /L Uranium-234 13966-29-5 T /L Uranium-236 13982-70-2 T /L Dissolved Oxygen DO N m /L 6.7 7.4 8.6 Temperature TEMP N Deg C 15.7 16.3 10.5 pH PH N 6.5 8.5 02L SU 5.8 5.4 5.69 Turbidit , field TURB N NTU 3.6 2.5 8.55 S ecific Conductivity field SC NPS/cm 37.8 37.6 42.6 Oxidation Reduction Potential ORP N mV 71.1 200.1 206.9 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 12 of 12 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-12BR GWA-12BR GWA-12D GWA-12D GWA-12S GWA-12S GWA-16D GWA-16D GWA-16S Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 7/17/2015 9/30/2015 7/17/2015 10/2/2015 7/17/2015 10/2/2015 7/16/2015 9/29/2015 7/16/2015 N N N N N N N N N GWA-12BR BL-GWA-12BR-NS-3Q15 GWA-12D BL-GWA-12D-NS-3Q15 GWA-12S BL-GWA-12S-NS-3Q15 GWA-16D BL-GWA-I6D-NS-3Q15 GWA-16S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pq/L 100 U 100 U 100 U 100 U 100 U 100 U 770 410 100 U Aluminum 7429-90-5 T pq/L 170 72 J 210 120 1900 280 810 480 330 Antimony 7440-36-0 D pq/L 0.52 0.78 0.91 0.5 U 1.2 0.82 1.6 J+ 2.2 0.2 J+ Antimony 7440-36-0 T 1 IMAC lag/L 0.65 0.52 0.33 J 0.5 U 0.31 J 0.96 1.5 J+ 2.3 0.25 J+ Arsenic 7440-38-2 D pq/L 0.93 1.1 0.42 J 0.5 U 0.5 U 0.2 J 1.8 2.3 0.5 U Arsenic 7440-38-2 T 10 02L lag/L 1.1 0.98 0.38 J 0.5 U 0.3 J 0.57 2.1 2 0.5 U Barium 7440-39-3 D pq/L 5 U 5 U 21 1 15 16 16 38 21 56 Barium 7440-39-3 T 700 02L pq/L 3.1 J 5 U 27 16 50 21 40 23 57 Beryllium 7440-41-7 D pq/L 0.094 J 0.2 U 0.081 J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.071 J Beryllium 7440-41-7 T 4 IMAC pg/L 0.48 J+ 0.2 U 0.087 J+ 0.2 U 0.17 J+ 0.2 U 0.2 U 0.2 U 0.2 U Boron 7440-42-8 D pq/L 38 J 50 U 46 J 50 U 50 U 50 U 50 U 37 J 50 U Boron 7440-42-8 T 700 02L pg/L 36 J 26 J 37 J 50 U 50 UJ 50 U 50 U 31 J 50 U Cadmium 7440-43-9 D pq/L 0.08 U 0.08 U 0.046 J 0.058 J 0.074 J 0.088 0.08 U 0.08 U 0.09 Cadmium 7440-43-9 T 2 02L pg/L 0.12 J+ 0.08 U 0.049 J+ 0.066 J 0.028 J+ 0.062 J 0.12 0.063 J 0.08 U Calcium 7440-70-2 T pq/L 17000 17000 7980 4500 4810 3330 26100 12200 1380 Chromium 7440-47-3 D pq/L 0.51 J+ 0.27 J 0.26 J+ 0.33 J 0.2 J+ 0.39 J 0.92 J+ 1.2 0.48 J+ Chromium 7440-47-3 T 10 02L pg/L 1 A J+ 0.59 J+ 1.3 J+ 1.1 J+ 4.9 1.1 J+ 3.1 J+ 1.1 6 Cobalt 7440-48-4 D pq/L 0.5 U 0.5 U 0.65 0.42 J 0.16 J 0.15 J 0.5 U 0.5 U 5.5 Cobalt 7440-48-4 T 1 IMAC pg/L 0.32 J 0.5 U 1 0.48 J 0.42 J 0.18 J 0.5 U 0.5 U 5.6 Copper 7440-50-8 D pq/L 7.4 J+ 1 U 1.4 J+ 0.25 J 2.2 J+ 9.7 1.9 J+ 1.1 0.85 J+ Copper 7440-50-8 T 1000 02L pq/L 27.2 2.3 J+ 4.9 J+ 1.4 7.9 J+ 1 J+ 2.3 J+ 3.2 0.89 J+ Iron 7439-89-6 D pq/L 50 U 32 J 50 U 50 U 50 U 50 U 50 U 50 U 50 U Iron 7439-89-6 T 300 02L pg/L 220 180 210 180 1900 300 79 74 610 Lead 7439-92-1 D pq/L 0.77 J+ 0.1 U 0.1 U 0.1 U 0.1 UJ 1.2 0.059 J+ 0.1 U 0.058 J+ Lead 7439-92-1 T 15 02L pq/L 0.28 J+ 0.062 J+ 0.6 J+ 0.2 1.1 J+ 0.2 0.082 J 0.074 J 0.22 Magnesium 7439-95-4 T pq/L 4430 4450 2720 1960 1730 1080 305 105 1230 Manganese 7439-96-5 D pq/L 44 39 250 140 130 92 5 U 5 U 140 Manganese 7439-96-5 T 50 02L pg/L 48 51 330 140 220 74 5 U 5 U 130 Mercury 7439-97-6 D pq/L 0.2 U 0.2 U 0.2 U 0.2 U 0.11 J 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L pq/L 0.2 U 0.075 J+ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N pq/L 1.1 J+ 1.9 J+ 3.7 J+ 3.2 J+ 10 U 2.4 J+ 10 U 2.9 J 2 J+ Molybdenum 7439-98-7 D pq/L 7.6 8.4 4.8 0.85 0.41 J 0.3 J 8.4 18.2 0.5 U Molybdenum 7439-98-7 T pq/L 8.1 6.6 3.4 1 0.51 0.22 J 8.9 15.2 0.17 J Nickel 7440-02-0 D pq/L 1.2 J+ 0.59 1.2 J+ 0.64 0.84 J+ 0.7 0.69 J+ 0.9 3.6 Nickel 7440-02-0 T 100 02L pq/L 1.9 0.87 J+ 1.5 J+ 1 1.6 J+ 0.65 J+ 1.7 J+ 0.74 5.7 Potassium 7440-09-7 T pq/L 2520 J 2580 J 2660 J 5000 U 3170 J 2600 J 41500 40600 5000 U Selenium 7782-49-2 D pq/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.4 J 0.69 0.5 U Selenium 7782-49-2 T 20 02L pq/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.53 0.6 0.5 U Sodium 7440-23-5 T pq/L 8550 8550 8020 6210 5820 4720 J 32600 53700 5000 U Strontium 7440-24-6 D pq/L 43 44 55 29 33 28 580 260 16 Strontium 7440-24-6 T pq/L 43 45 49 28 53 27 570 270 15 Thallium 7440-28-0 D pq/L 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.051 J+ Thallium 7440-28-0 T 0.2 IMAC pg/L 0.12 J+ 0.1 U 0.033 J+ 0.1 U 0.043 J+ 0.1 U 0.1 U 0.1 U 0.054 J Vanadium 7440-62-2 D pq/L 0.75 J 0.28 J 1.4 1 U 1 U 1 U 9.6 11.3 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 1.2 0.54 J 1.5 0.36 J 1.7 0.38 J 10.2 9.7 0.64 J Zinc 7440-66-6 D pq/L 6.5 J+ 10 U 9.9 J+ 9.4 J 3.1 J+ 7.8 J 10 U 2.8 J 9.1 J Zinc 7440-66-6 T 1000 02L pq/L 20 3.7 J 8.8 J 26 J+ 39 11 10 U 69 8.5 J Total Dissolved Solids TDS N 500000 02L pg/L 106000 100000 94000 49000 87000 88000 J+ 256000 257000 30000 Total Organic Carbon TOC N pq/L 780 J 1000 U 590 J 1000 U 810 J 1000 U 2500 1 1200 1000 U Total Suspended Solids TSS N pq/L 5700 3200 7200 4900 48500 4000 U 16400 5000 29400 Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 57400 46600 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 64400 71000 44400 27700 27900 20300 113000 88600 10700 Alkalinity, lab ALK-LAB N pq/L 64400 71000 44400 27700 27900 20300 J- 170000 135000 10700 Chloride 16887-00-6 N 250000 02L pg/L 2100 1800 1800 1800 1600 1600 3000 2900 670 J Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 20 U 12 J 20 U 27 220 200 14 J+ 430 20 UJ Sulfate 14808-79-8 N 250000 02L pq/L 7900 7400 2000 1500 1400 630 J 25900 38400 430 J Sulfide 18496-25-8 N pq/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pq/L - 0.558 J+ 0.656 J+ - 0.3 UJ - - 1.58 - Chromium 7440-47-3 T 10 02L pg/L 0.519 J+ 2.45 J+ 6.65 2.45 J+ Iron 7439-89-6 T 300 02L pg/L 162 203 J+ 639 71.2 J+ Manganese 7439-96-5 D pq/L 28.8 341 157 0.308 J+ Manganese 7439-96-5 T 50 02L pg/L 35.8 345 J+ 195 J+ 1.26 J+ As(III) 7784-46-5 T pq/L 0.5 UJ 0.575 J+ 0.446 J+ 0.351 J+ As(V) 10103-60-3 T pq/L 0.558 J+ 0.5 U 0.5 UJ 1.22 Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L - 0.014 J 0.014 J - Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L 0.02 UJ - - 0.77 Fe(II) 1345-25-1 T pq/L 23.1 J+ 40 U U LOU 30 UJ Se(IV) 10102-18-8 T pq/L 2 U 2 U 2 2 U Page 1 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-12BR GWA-12BR GWA-12D GWA-12D GWA-12S GWA-12S GWA-16D GWA-16D GWA-16S Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 7/17/2015 9/30/2015 7/17/2015 10/2/2015 7/17/2015 10/2/2015 7/16/2015 9/29/2015 7/16/2015 N N N N N N N N N GWA-12BR BL-GWA-12BR-NS-3Q15 GWA-12D BL-GWA-12D-NS-3Q15 GWA-12S BL-GWA-12S-NS-3Q15 GWA-16D BL-GWA-I6D-NS-3Q15 GWA-16S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se(VI) 13410-01-0 T pq/L 2 UJ 2 U 2 U 2 UJ Uranium, Natural 7440-61-1 T pq/L Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pq/L Uranium-234 13966-29-5 T pq/L Uranium-236 13982-70-2 T pq/L Dissolved Oxygen DO N mg/L 0.82 2.73 2.77 5.29 4.99 6 4.81 3 5.91 Temperature TEMP N - Deg C 21 20.1 20.9 15.6 21.9 13.8 20.1 21.4 21.4 pH PH N 6.5 8.5 02L SU 8.13 7.78 6.7 5.7 6.08 6 11.52 11 5.43 Turbidity, field TURB N - NTU 10.08 4.73 38.74 3.9 7.44 9 9.6 5.4 70 Specific Conductivity (field) Sc N pS/cm 149.7 156.8 111.3 67.6 57.6 53.1 63 592 32 Oxidation Reduction Potential ORP N mV1 -21.6 1 -32.2 67 175.1 230.7 1 41.1 1 96.8 1 2.4 140 GW Depth (TOC) GW DEPTH-TOC N ft 66.12 42.58 - Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 2 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-16S GWA-17D GWA-17D GWA-17S GWA-17S GWA-1D GWA-1D GWA-1S GWA-1S Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 9/29/2015 7/15/2015 9/29/2015 7/15/2015 9/29/2015 7/12/2015 9/30/2015 7/12/2015 9/30/2015 N N N N N N N N N BL-GWA-16S-NS-3Q15 GWA-17D BL-GWA-17D-NS-3Q15 GWA-17S BL-GWA-17S-NS-3Q15 GWA-1D BL-GWA-ID-NS-3Q15 GWAAS BL-GWA-IS-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pq/L 100 U 150 100 U 100 U 85 J 150 100 U 340 190 Aluminum 7429-90-5 T pq/L 88J 190 180 400 11700 580 870 760 320 Antimony 7440-36-0 D pq/L 0.5 U 0.22 J+ 0.98 0.5 U 0.5 U 0.62 0.68 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC lag/L 0.5 U 0.19 J 1 0.5 U 0.27 J 0.63 0.82 0.5 U 0.5 U Arsenic 7440-38-2 D pq/L 0.5 U 0.76 J+ 0.64 0.14 J+ 0.13 J 2.3 1.2 0.25 J 0.5 U Arsenic 7440-38-2 T 10 02L lag/L 0.5 U 0.8 0.68 0.16 J 0.54 2.4 2.5 0.49 J 0.48 J Barium 7440-39-3 D I pq/L 41 7.2 1 7.2 20 31 6.4 6.3 340 280 Barium 7440-39-3 T 700 02L pq/L 44 7.6 7.7 25 130 11 19 340 320 Beryllium 7440-41-7 D pq/L 0.095 J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 6.3 5.5 Beryllium 7440-41-7 T 4 IMAC pg/L 0.098 J 0.2 U 0.2 U 0.2 U 0.15 J 0.2 U 0.2 U 6 6.5 Boron 7440-42-8 D pq/L 50 U 50 U 110 50 U 50 U 50 U 50 U 440 420 Boron 7440-42-8 T 700 02L pg/L 50 U 50 U 93 50 U 40 J 50 U 50 U 430 390 Cadmium 7440-43-9 D pq/L 0.067 J 0.08 U 0.08 U 0.08 U 0.08 U 0.2 0.043 J 0.46 0.47 Cadmium 7440-43-9 T 2 02L I pg/L 0.067 J 0.08 U 0.07 J 0.08 U 0.05 J 0.2 0.037 J 0.46 0.47 Calcium 7440-70-2 T pq/L 1110 20000 17200 5200 7020 9780 10900 8680 10900 Chromium 7440-47-3 D pq/L 0.4 J 0.2 J+ 0.32 J 0.23 J+ 0.98 1.3 0.5 U 12.5 7.7 Chromium 7440-47-3 T 10 02L pg/L 1 0.73 J+ 1.4 J+ 50.7 27.6 4 37.1 29.7 32.1 Cobalt 7440-48-4 D pq/L 4.5 0.5 U 0.5 U 1.4 2.8 1.4 2.6 8.4 6.3 Cobalt 7440-48-4 T 1 IMAC pg/L 4.2 0.5 U 0.5 U 2.6 6.4 1.6 3.4 10 7.4 Copper 7440-50-8 D pq/L 2.8 1 U 0.4 J 1 U 2 1.6 1.9 4.7 1.1 Copper 7440-50-8 T 1000 02L I pq/L 5.3 0.43 J 1.6 J+ 1.4 11.2 1.1 3.5 0.96 J 1.3 Iron 7439-89-6 D pq/L 50 U 50 U 50 U 510 1300 140 50 U 82 47 J Iron 7439-89-6 T 300 02L pg/L 140 39J+ 190 1500 18800 620 1400 780 230 Lead 7439-92-1 D pq/L 0.1 U 0.051 J 0.1 U 0.1 U 0.059 J 0.16 0.16 0.37 0.28 Lead 7439-92-1 T 15 02L pq/L 0.068 J 0.1 U 0.15 J+ 0.091 J+ 2.4 0.46 0.76 0.37 0.38 Magnesium 7439-95-4 T pq/L 1120 296 1100 3350 7330 4000 4710 29200 29700 Manganese 7439-96-5 D pq/L 110 5 U 2.5 J 380 630 21 26 350 280 Manganese 7439-96-5 T 50 02L pg/L 110 5 U 4.9 J 430 740 25 44 390 270 Mercury 7439-97-6 D pq/L 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 Mercury 7439-97-6 T 1 02L pq/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.075 J+ 0.2 U Methane 74-82-8 N pq/L 3.5 J 1.9 J+ 1.4 J+ 2.2 J+ 2.9 J+ 1.5 J+ 1.3 J+ 2.5 J+ 2.5 J+ Molybdenum 7439-98-7 D pq/L 0.31 J 1.4 1.2 5.8 2.8 5.2 3.8 0.26 J 0.13 J Molybdenum 7439-98-7 T pq/L 0.26 J 1.5 1.3 5.9 4.1 5.2 4.6 0.55 0.59 Nickel 7440-02-0 D pq/L 2.5 0.5 U 0.47 J 14.5 5.5 8.2 16.6 35.8 28.9 Nickel 7440-02-0 T 100 02L pq/L 2.3 0.36 J 0.58 28.7 12.5 8.6 28.4 45.2 43.1 Potassium 7440-09-7 T pq/L 5000 U 4860 J 3500 J 3710 J 6960 5000 U 3280 J 5180 5000 J Selenium 7782-49-2 D pq/L 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 Selenium 7782-49-2 T 20 02L pq/L 0.5 U 0.5 U 0.5 U 0.5 U 0.32 J 0.5 U 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T pq/L 5000 U 7860 6840 4340 J 5180 20100 18000 15000 16100 Strontium 7440-24-6 D pq/L 13 75 66 22 22 66 75 180 240 Strontium 7440-24-6 T pq/L 15 79 64 23 37 70 80 180 200 Thallium 7440-28-0 D pq/L 0.07 J 0.021 J+ 0.1 U 0.028 J+ 0.1 U 0.022 J 0.051 J 0.34 0.37 Thallium 7440-28-0 T 0.2 IMAC pg/L 0.06 J 0.1 U 0.1 U 0.1 U 0.1 0.07 J 0.051 J 0.34 0.41 Vanadium 7440-62-2 D pq/L 1 U 2.8 1.3 1 U 0.88 J 1.1 0.45 J 1 U 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 0.31 J 3.4 1.6 1.8 33.9 1.5 1.7 0.29 J 0.57 J Zinc 7440-66-6 D pq/L 21 10 U 10 U 10 U 6.5 J 6.6 J 15 19 15 Zinc 7440-66-6 T 1000 02L pq/L 22 10 U 10 U 14 J+ 47 6.9 J 9.7 J 21 17 Total Dissolved Solids TDS N 500000 02L pg/L 34000 109000 59000 70000 44000 158000 135000 380000 251000 Total Organic Carbon TOC N pq/L 1000 U 510 J 1000 U 1000 U 510 J 1000 U 1000 U 1000 U 1000 U Total Suspended Solids TSS N pq/L 2500 U 2500 U 5500 58700 915000 46200 8300 18400 10800 Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 52000 1 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 7000 12700 41800 32200 28700 37200 33600 1400 J 1200 J Alkalinity, lab ALK-LAB N pq/L 7000 64700 41800 32200 28700 37200 33600 1400 J 1200 J Chloride 16887-00-6 N 250000 02L pg/L 1100 1400 1700 1100 1600 27300 28200 127000 133000 Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 20 J 20 UJ 20 U 100 J- 56 420 650 640 660 Sulfate 14808-79-8 N 250000 02L pq/L 980 J 13500 14400 5600 8100 4300 8800 1000 U 540 J Sulfide 18496-25-8 N pq/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pq/L 0.5 U - 0.576 J - 0.5 U - - - Chromium 7440-47-3 T 10 02L pg/L 1.73 J+ 3.36 J+ 1.77 J+ Iron 7439-89-6 T 300 02L pg/L 76.4 J+ 592 J 650 Manganese 7439-96-5 D pq/L 86 2.31 J+ 722 Manganese 7439-96-5 T 50 02L pg/L 83.2 12.1 J 730 As(III) 7784-46-5 T I pq/L 0.209 J+ 0.209 J+ 0.209 J+ As(V) 1 10103-60-3 T I I pq/L 0.5 UJ 0.366 J 0.5 U Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L - - - Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L 0.039 0.013 J 0.02 U Fe(II) 1345-25-1 T pq/L 13.8 J+ 30 UJ 967 J- Se(IV) 10102-18-8 T pq/L 2 U 2 U 2 U Page 3 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-16S GWA-17D GWA-17D GWA-17S GWA-17S GWA-1D GWA-1D GWA-1S GWA-1S Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 9/29/2015 7/15/2015 9/29/2015 7/15/2015 9/29/2015 7/12/2015 9/30/2015 7/12/2015 9/30/2015 N N N N N N N N N BL-GWA-16S-NS-3Q15 GWA-17D BL-GWA-17D-NS-3Q15 GWA-17S BL-GWA-17S-NS-3Q15 GWA-1D BL-GWA-ID-NS-3Q15 GWA-1S BL-GWA-1S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se(VI) 13410-01-0 T pq/L 2 U 2 UJ 2 UJ Uranium, Natural 7440-61-1 T pq/L Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pq/L Uranium-234 13966-29-5 T pq/L Uranium-236 13982-70-2 T pq/L - - Dissolved Oxygen DO N mg/L 4.9 0.56 1.69 0.76 1.49 5.64 3.22 3.98 Temperature TEMP N Deg C 21.6 18.3 22.3 23.6 24.5 23 22.5 23.1 pH PH N 6.5 8.5 02L SU 5.2 10.29 8.68 6.7 6.37 6.72 6.6 4.94 Turbidity, field TURB N - NTU 9 3.25 13.13 21.7 7.94 11.66 9.9 8.32 Specific Conductivity (field) Sc N PS/cm 25.3 172 133.7 102 116.1 168.9 197.4 406.9 Oxidation Reduction Potential ORP N mV 74.7 103A -26.4 13.7 -14.7 221.8 163.7 345.1 GW Depth (TOC) GW DEPTH-TOC N ft 36.4 41.72 46 - Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 4 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-2D GWA-21D GWA-2S GWA-2S GWA-3D GWA-31D GWA-3S GWA-4D GWA-41D Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 2 Round 1 Round 2 7/11/2015 9/30/2015 7/11/2015 9/30/2015 7/15/2015 10/1/2015 9/30/2015 7/14/2015 10/1/2015 N N N N N N N N N GWA-2D BL-GWA-2D-NS-3Q15 GWA-2S BL-GWA-2S-NS-3Q15 GWA-3D BL-GWA-3D-NS-3Q15 BL-GWA-3S-NS-3Q15 GWA-4D BL-GWA-4D-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pq/L 100 U 100 U 100 U 100 U 51 J 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T pq/L 130 100 U 1200 180 120 570 400 130 76 J Antimony 7440-36-0 D pq/L 0.16 J 0.5 U 0.5 U 0.5 U 0.6 0.5 U 0.34 J 1.7 0.44 J Antimony 7440-36-0 T 1 IMAC lag/L 0.5 U 0.5 U 0.25 J 0.5 U 0.41 J+ 0.17 J 0.37 J 1.8 0.64 Arsenic 7440-38-2 D pq/L 4.9 2.5 0.5 U 0.5 U 0.17 J+ 0.5 U 0.5 U 1.4 1.1 Arsenic 7440-38-2 T 10 02L lag/L 4.6 3 1.4 0.4 J 0.18 J 0.17 J 0.26 J 1.4 1.3 Barium 7440-39-3 D pq/L 6.5 5 U 16 12 23 27 62 19 20 Barium 7440-39-3 T 700 02L pq/L 8.6 5 U 30 15 29 28 71 22 19 Beryllium 7440-41-7 D pq/L 0.2 U 0.2 U 0.3 0.23 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Beryllium 7440-41-7 T 4 IMAC pg/L 0.085 J 0.2 U 0.5 0.28 0.2 U 0.2 U 0.12 J 0.2 U 0.2 U Boron 7440-42-8 D pq/L 37 J 50 U 50 U 50 U 44 J 50 U 50 U 31 J 32 J Boron 7440-42-8 T 700 02L pg/L 37 J 50 U 50 U 50 U 86 J+ 110 J+ 50 U 46 J 71 J+ Cadmium 7440-43-9 D pq/L 0.08 U 0.08 U 0.08 U 0.08 U 0.029 J 0.08 U 0.08 U 0.25 0.08 U Cadmium 7440-43-9 T 2 02L pg/L 0.036 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.3 0.031 J Calcium 7440-70-2 T pq/L 5700 3290 401 118 13500 13000 13500 34100 30900 Chromium 7440-47-3 D pq/L 0.43 J 0.19 J 0.46 J 0.5 U 0.9 2.6 0.96 4.4 3.2 Chromium 7440-47-3 T 10 02L pg/L 1.6 J+ 1 J+ 2.5 0.47 J+ 1 J+ 5.4 J+ 11.8 6.2 4.3 J+ Cobalt 7440-48-4 D pq/L 1 0.44 J 1.2 1 0.48 J 0.17 J 0.15 J 0.26 J 0.5 U 0.5 U Cobalt 7440-48-4 T 1 IMAC pg/L 1.1 0.54 2 0.6 0.17 J 0.41 J 0.59 0.5 UJ 0.5 U Copper 7440-50-8 D I pq/L 0.49 J+ 1.3 0.82 J+ 0.36 J 0.42 J 8.3 0.33 J 3.6 0.53 J Copper 7440-50-8 T 1000 02L pq/L 0.73 J 0.26 J 0.62 J 1 U 0.62 J 1.9 J+ 5.6 4.5 1.2 Iron 7439-89-6 D pq/L 100 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U Iron 7439-89-6 T 300 02L pg/L 320 46 J 1600 250 44 J 570 620 120 65 Lead 7439-92-1 D pq/L 0.1 U 0.14 0.1 U 0.1 U 0.1 U 0.9 0.1 U 0.083 J 0.1 U Lead 7439-92-1 T 15 02L pq/L 0.15 0.055 J 1.1 0.15 0.1 U 0.27 J+ 0.74 J+ 0.13 0,095 J Magnesium 7439-95-4 T pq/L 2130 1440 424 282 1010 1200 1660 2450 2660 Manqanese 7439-96-5 D pq/L 96 71 51 18 19 24 390 6.9 5 U Manganese 7439-96-5 T 50 02L pg/L 96 70 84 23 17 33 490 8.9 4.1 J Mercury 7439-97-6 D pq/L 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 Mercury 7439-97-6 T 1 02L pq/L 0.11 J+ 0.2 U 0.12 J+ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N pq/L 3 J+ 1.4 J+ 10 UJ 0.92 J+ 1.8 J+ 1.6 J+ 1.6 J+ 2.9 J+ 4.2 J+ Molybdenum 7439-98-7 D pq/L 3.6 0.75 0.5 U 0.5 U 0.24 J 0.18 J 1.4 1.8 1.3 Molybdenum 7439-98-7 T pq/L 3.5 0.83 0.14 J 0.5 U 0.31 J 0.19 J 1.7 2.2 1.3 Nickel 7440-02-0 D pq/L 1.4 1 1.3 0.39 J 0.45 J 3 0.73 0.88 0.42 J Nickel 7440-02-0 T 100 02L pq/L 2.2 1.5 3.3 0.56 0.57 J+ 4.4 1.6 1 1.2 J+ Potassium 7440-09-7 T pq/L 2630 J 5000 U 5000 U 5000 U 8350 5270 3340 J 2730 J 5000 U Selenium 7782-49-2 D pq/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.24 J 0.5 U Selenium 7782-49-2 T 20 02L pq/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.29 J 0.5 U Sodium 7440-23-5 T pq/L 6450 4740J 2540J 3020 J 12800 11100 9290 22900 24200 Strontium 7440-24-6 D pq/L 35 26 5.5 2.9 J 150 200 150 180 190 Strontium 7440-24-6 T pq/L 41 27 5.7 2.9 J 230 150 160 190 170 Thallium 7440-28-0 D pq/L 0.1 U 0.1 U 0.063 J 0.072 J 0.1 U 0.1 U 0.022 J 0.1 U 0.1 U Thallium 7440-28-0 T 0.2 IMAC pg/L 0.1 U 0.1 U 0.1 UJ 0.088 J 0.1 U 0.1 U 0.051 J 0.1 U 0.1 U Vanadium 7440-62-2 D pq/L 0.57 J 0.28 J 1 U 1 U 0.58 J 0.45 J 0.62 J 7.5 6.1 Vanadium 7440-62-2 T 0.3 IMAC pg/L 0.79 J 0.55 J 0.46 J 1 U 1 U 1.5 2.3 7.9 6.5 Zinc 7440-66-6 D pq/L 10 U 10 U 5.2 J 10 U 5.3 J 59 J+ 19 5.4 J 7.1 J Zinc 7440-66-6 T 1000 02L I pq/L 3.7 J 10 U 3.8 J 2.5 J 5.5 J+ 1 73 24 11 J+ 21 Total Dissolved Solids TDS N 500000 02L pg/L 73000 49000 33000 25000 U 113000 96000 105000 188000 158000 Total Organic Carbon TOC N pq/L 1000 U 8800 10100 1000 U 520 J 1000 U 1800 2100 520 J Total Suspended Solids TSS N pq/L 115000 2500 U 63200 9400 2500 U 194000 95500 5900 6800 Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 33300 21800 5700 6600 49400 33400 51400 130000 116000 Alkalinity, lab ALK-LAB N pq/L 33300 21800 5700 6600 49400 J+ 33400 51400 130000 116000 Chloride 16887-00-6 N 250000 02L pg/L 1600 2100 1300 1800 10900 10500 8300 7300 7100 Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 20 U 69 40 67 1700 J- 1700 1500 530 630 Sulfate 14808-79-8 N 250000 02L pq/L 990 J 950 J 1000 U 750 J 480 J 550 J 560 J 6000 3600 Sulfide 18496-25-8 N pq/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pq/L - - - - 0.426 J+ - 0.5 UJ 1.18 J+ Chromium 7440-47-3 T 10 02L pg/L 0.896 J+ 4.35 11.8 J+ Iron 7439-89-6 T 300 02L I pg/L 100 U 184 233 J+ Manganese 7439-96-5 D pq/L 19.1 468 7.42 Manganese 7439-96-5 T 50 02L pg/L 21.6J+ 497 10.6J+ As(III) 7784-46-5 T pq/L 0.155 J+ 0.5 UJ 0.306 J+ As(V) 10103-60-3 T pq/L 0.272 J 0.5 UJ 0.871 J+ Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L 0.6 - 3.7 Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L - 0.027 J - Fe(II) 1345-25-1 T pq/L 30 UJ 60.7 J+ 30 UJ Se(IV) 10102-18-8 T pq/L 2 U 2 U 2 U Page 5 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-2D GWA-21D GWA-2S GWA-2S GWA-3D GWA-31D GWA-3S GWA-4D GWA-4D Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 2 Round 1 Round 2 7/11/2015 9/30/2015 7/11/2015 9/30/2015 7/15/2015 10/1/2015 9/30/2015 7/14/2015 10/1/2015 N N N N N N N N N GWA-2D BL-GWA-2D-NS-3Q15 GWA-2S BL-GWA-2S-NS-3Q15 GWA-3D BL-GWA-3D-NS-3Q15 BL-GWA-3S-NS-3Q15 GWA-4D BL-GWA-4D-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se(VI) 13410-01-0 T pq/L 2 U 2 UJ 2 U Uranium, Natural 7440-61-1 T pq/L Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pq/L Uranium-234 13966-29-5 T pq/L Uranium-236 13982-70-2 T pq/L - - - - - Dissolved Oxygen DO N mg/L 2.07 4.71 5.5 4.41 6.4 6.65 3.2 6.02 7.4 Temperature TEMP N - Deg C 24.1 15.3 22.5 17.6 16.9 17.1 23.9 21.5 17.4 pH PH N 6.5 8.5 02L SU 6.37 6.1 5.29 4.9 5.81 6 6 7.6 8.32 Turbidity, field TURB N - NTU 7.4 2 11.74 2 5.43 13.45 4.5 8.3 6.02 Specific Conductivity (field) Sc N pS/cm 74.2 55.7 19.4 496.2 133.1 122.3 148.8 285.1 232.9 Oxidation Reduction Potential ORP N mV1 134.1 1 180.8 1 321.4 1 320.9 153.5 184.2 107.3 164.2 95.2 GW Depth (TOC) GW DEPTH-TOC N ft 44.8 30.44 - i i 52.53 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 6 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-5BR2 GWA-5BR2 GWA-5D GWA-5D GWA-5S GWA-5S GWA-61) GWA-6D GWA-6S Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 7/13/2015 9/29/2015 7/13/2015 9/28/2015 7/14/2015 9/28/2015 7/16/2015 10/2/2015 7/16/2015 N N N N N N N N N GWA-5BR2 BL-GWA-5BR(2)-NS-3Q15 GWA-5D BL-GWA-5D-NS-3Q15 GWA-5S BL-GWA-5S-NS-3Q15 GWA-61D BL-GWA-6D-NS-3Q15 GWA-6S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pq/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T pg/L 75 J 100 U 100 U 180 210 400 390 410 90 J Antimony 7440-36-0 D pq/L 1.5 J+ 0.56 0.47 J+ 0.23 J 3 0.5 U 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC lag/L 1.3 0.63 0.37 J 1 2.5 0.5 U 0.17 J+ 0.23 J 0.5 U Arsenic 7440-38-2 D lag/L 1.2 0.56 0.35 J 0.33 J 0.5 U 0.19 J 0.66 1.6 0.5 U Arsenic 7440-38-2 T 10 02L lag/L 1.2 0.54 0.29 J 0.42 J 0.5 U 0.5 U 0.84 1.9 0.5 U Barium 7440-39-3 D pq/L 5.2 7.8 9.6 1 10 12 14 25 22 70 Barium 7440-39-3 T 700 02L pq/L 5.7 7.8 10 13 14 19 27 25 68 Beryllium 7440-41-7 D pq/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.4 Beryllium 7440-41-7 T 4 IMAC pg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 1.4 Boron 7440-42-8 D pq/L 45 J 51 50 U 46 J 50 U 50 J 50 U 50 U 31 J Boron 7440-42-8 T 700 02L pg/L 45 J 44 J 50 U 50 U 50 U 50 U 50 U 50 U 31 J Cadmium 7440-43-9 D pq/L 0.067 J 0.08 U 0.081 0.08 U 0.046 J 0.08 U 0.08 U 0.08 U 0.6 Cadmium 7440-43-9 T 2 02L pg/L 0.025 J 0.08 U 0.035 J 0.062 J 0.044 J 0.08 U 0.045 J 0.035 J 0.59 Calcium 7440-70-2 T pq/L 18900 20100 30200 33000 7160 6890 16600 25100 3120 Chromium 7440-47-3 D pg/L 0.71 0.17 J 0.47 J 0.34 J 2.9 0.31 J 0.21 J+ 0.5 U 0.44 J+ Chromium 7440-47-3 T 10 02L pg/L 0.79 J+ 0.34 J 1.9 J+ 0.65 J+ 4.4 0.94 J+ 3.3 J+ 1.8 J+ 0.95 J+ Cobalt 7440-48-4 D pq/L 0.5 U 0.5 U 0.42 J 0.26 J 0.74 0.41 J 2.4 0.38 J 2.4 Cobalt 7440-48-4 T 1 IMAC pg/L 0.5 U 0.5 U 0.46 J 0.4 J 0.79 0.68 2.9 1 2.5 Copper 7440-50-8 D pg/L 0.5 J 0.72 J 2.1 0.99 J 2.5 9.6 1 UJ 1.4 0.38 J+ Copper 7440-50-8 T 1000 02L pq/L 0.68 J+ 0.44 J+ 0.68 J+ 1 1.4 1.5 0.84 J 2 J+ 0.82 J 0.25 J+ Iron 7439-89-6 D pq/L 50 U 50 U 50 U 50 U 50 U 50 U 190 300 50 U Iron 7439-89-6 T 300 02L pg/L 57 50 U 50 U 160 260 520 820 1000 86 Lead 7439-92-1 D pq/L 0.1 U 0.12 0.13 0.052 J 0.1 U 1.1 0.07 J+ 0.22 0.1 U Lead 7439-92-1 T 15 02L pq/L 0.064 J 0.1 U 0.071 J 0.28 J+ 0.12 0.42 J+ 0.26 0.18 0.064 J Magnesium 7439-95-4 T pq/L 1810 3510 5790 6500 1070 1150 5310 6550 2530 Manganese 7439-96-5 D pq/L 3.9J 48 970 1200 400 180 170 250 600 Manganese 7439-96-5 T 50 02L pg/L 4.3J 45 1100 1200 420 190 160 240 540 Mercury 7439-97-6 D pg/L 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 Mercury 7439-97-6 T 1 02L pq/L 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 Methane 74-82-8 N pq/L 10 U 5.4 J+ 10 U 2.1 J+ 1.6 J+ 1 J+ 1.4 J+ 4 J+ 1.3 J+ Molybdenum 7439-98-7 D pq/L 36.5 40.1 12.8 9.6 0.27 J 0.11 J 1.8 3.1 0.5 U Molybdenum 7439-98-7 T pq/L 38.3 33.8 12.3 10.2 0.38 J 0.1 J 2.6 6 0.5 U Nickel 7440-02-0 D pq/L 0.42 J 0.23 J 1.2 0.96 3.5 0.74 2.5 J+ 0.64 3.2 J+ Nickel 7440-02-0 T 100 02L pq/L 0.27 J+ 0.39 J 1.5 J+ 1.7 3.1 0.79 4.3 1.8 J+ 3.5 Potassium 7440-09-7 T pq/L 5210 3680 J 5000 U 2630 J 5000 U 5000 U 2610 J 3260 J 2790 J Selenium 7782-49-2 D pg/L 0.42 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pq/L 0.38 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T pq/L 16100 14700 25900 23000 5900 6080 7130 11400 3600 J Strontium 7440-24-6 D pg/L 84 86 150 170 79 80 77 100 25 Strontium 7440-24-6 T pq/L 90 84 160 170 82 80 78 100 25 Thallium 7440-28-0 D pq/L 0.059 J+ 0.1 U 0.099 J+ 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.24 Thallium 7440-28-0 T 0.2 IMAC pg/L 0.1 U 0.1 U 0.051 J+ 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.24 Vanadium 7440-62-2 D pq/L 2.3 0.42 J 0.98 J 0.7 J 0.34 J 0.35 J 0.77 J 0.28 J 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 2.6 0.32 J 0.98 J 0.84 J 0.58 J 0.78 J 2.2 1.2 1 U Zinc 7440-66-6 D pq/L 10 U 9.7 J 10 U 10 10 U 10 U 10 U 2.9 J 8.6 J Zinc 7440-66-6 T 1000 02L pq/L 10 U 10 U 10 U 2.6 J 4.8 J+ 4.4 J 10 U 27 J+ 7.1 J Total Dissolved Solids TDS N 500000 02L pg/L 105000 130000 163000 189000 75000 68000 121000 148000 53000 Total Organic Carbon TOC N pq/L 2100 1100 860 J 1000 U 1000 U 1000 U 1000 U 1000 U 1000 U Total Suspended Solids TSS N pq/L 2500 U 5000 U 2500 U 13000 3400 42100 30500 21300 27700 Alkalinity, CO3 ALK-CO3 N I pq/L 16800 5300 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 25800 59800 136000 144000 28900 24000 77100 103000 5700 Alkalinity, lab ALK-LAB N pq/L 42600 65100 136000 144000 28900 24000 77100 103000 5700 Chloride 16887-00-6 N 250000 02L pg/L 7100 6100 4800 4600 2200 2500 2400 3100 J+ 7100 Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 22 330 730 980 1400 1500 170 J+ 36 290 J+ Sulfate 14808-79-8 N 250000 02L pq/L 18700 13100 7800 5700 1000 U 1000 U 3500 5400 10700 Sulfide 18496-25-8 N pq/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pq/L 1.05 J+ - 0.44 J+ - 0.5 UJ - - - - Chromium 7440-47-3 T 10 02L pg/L 1.47 J+ 1.25 J+ 8.72 Iron 7439-89-6 T 300 02L pg/L 72.8 J+ 44.7 J+ 159 Manganese 7439-96-5 D pq/L 5.1 J+ 1140 425 Manganese 7439-96-5 T 50 02L pg/L 6.03 J+ 1170 478 As(III) 7784-46-5 T pg/L - - 0.5 UJ As(V) 10103-60-3 T pq/L 1.05 J+ 0.44 J+ 0.5 UJ Chromium (VI) 18540-29-9 D 0.07 DHHS I pg/L 0.16 0.02 U 2.2 Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L - - Fe(II) 1345-25-1 T pg/L 30 UJ 30 U 30 UJ Se(IV) 10102-18-8 T pq/L 2 U 2 U 2 U Page 7 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-5BR2 GWA-5BR2 GWA-5D GWA-5D GWA-5S GWA-5S GWA-61) GWA-6D GWA-6S Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 7/13/2015 9/29/2015 7/13/2015 9/28/2015 7/14/2015 9/28/2015 7/16/2015 10/2/2015 7/16/2015 N N N N N N N N N GWA-5BR2 BL-GWA-5BR(2)-NS-3Q15 GWA-5D BL-GWA-5D-NS-3Q15 GWA-5S BL-GWA-5S-NS-3Q15 GWA-61D BL-GWA-6D-NS-3Q15 GWA-6S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se(VI) 13410-01-0 T pq/L 2 U 2 U 2 U Uranium, Natural 7440-61-1 T pq/L Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pq/L Uranium-234 13966-29-5 T pq/L Uranium-236 13982-70-2 T pg/L - - - - - - - - - Dissolved Oxygen DO N mg/L 0.19 0.8 6.5 0.33 6.88 5.42 1.31 0.3 4.44 Temperature TEMP N Deg C 20.6 16.8 20 21 19.7 21.2 18.9 15 17.4 pH PH N 6.5 8.5 02L SU 10.08 9.4 7.67 7.6 5.74 5.8 6.63 7.2 4.36 Turbidity, field TURB N - NTU 3.02 1.2 4.08 7.6 10.5 4.9 9.43 9 5.49 Specific Conductivity (field) Sc N PS/cm 209 209 314 306.9 28.8 76.7 173 253.7 81 Oxidation Reduction Potential ORP N mV 100.1 78.8 157.1 116.7 141.2 283.5 33.2 91 260.5 GW Depth (TOC) GW DEPTH-TOC N ft - 36.11 32.4 - - Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 8 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-6S GWA-71D GWA-7D GWA-7S GWA-7SA GWA-8D GWA-81D GWA-8S GWA-8S Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 10/2/2015 7/15/2015 10/2/2015 7/15/2015 10/2/2015 7/15/2015 9/29/2015 7/14/2015 9/29/2015 N N N N N N N N N BL-GWA-6S-NS-3Q15 GWA-7D BL-GWA-7D-NS-3Q15 GWA-7S BL-GWA-7SA-NS-3Q15 GWA-8D BL-GWA-8D-NS-3Q15 GWA-8S BL-GWA-8S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pq/L 100 U 100 U 100 U 100 U 100 U 100 UJ 100 U 100 U 100 U Aluminum 7429-90-5 T pg/L 290 58 J 260 150 2100 450 100 100 U 1100 Antimony 7440-36-0 D pq/L 0.5 U 0.23 J+ 1.1 0.5 U 0.31 J 1.1 J+ 0.32 J 0.62 J+ 0.5 U Antimony 7440-36-0 T 1 IMAC lag/L 0.5 U 0.34 J 1.1 0.5 U 0.28 J 0.65 0.45 J 0.62 J+ 0.5 U Arsenic 7440-38-2 D lag/L 0.5 U 3.2 2.6 0.5 U 0.5 U 0.33 J+ 0.5 0.12 J 0.5 U Arsenic 7440-38-2 T 10 02L lag/L 0.12 J 3.4 2.3 0.5 U 0.31 J 0.46 J 0.31 J 0.17 J+ 0.5 U Barium 7440-39-3 D I pq/L 78 15 14 190 190 7.5 J- 4.9 J 69 67 Barium 7440-39-3 T 700 02L pq/L 87 16 19 200 270 12 4.9 J 72 77 Beryllium 7440-41-7 D pq/L 1.6 0.2 U 0.2 U 2.6 2.1 0.2 U 0.2 U 0.14 J 0.33 Beryllium 7440-41-7 T 4 IMAC pg/L 1.4 0.2 U 0.2 U 2.7 2.9 0.2 U 0.068 J 0.22 0.28 Boron 7440-42-8 D pq/L 32 J 30 J 50 U 83 68 50 U 50 U 80 82 Boron 7440-42-8 T 700 02L pg/L 29 J 42 J 50 U 92 64 30 J 50 U 73 73 Cadmium 7440-43-9 D pq/L 0.57 0.026 J 0.026 J 0.13 0.11 0.08 U 0.08 U 0.12 1 0.12 Cadmium 7440-43-9 T 2 02L pg/L 0.59 0.14 0.051 J 0.14 0.11 0.08 U 0.08 U 0.18 0.11 Calcium 7440-70-2 T pq/L 3100 31600 33500 2220 2880 13300 13600 18500 18100 Chromium 7440-47-3 D pg/L 0.5 U 1.3 J+ 1.6 0.66 J+ 0.85 0.3 J+ 0.53 0.26 J+ 0.73 Chromium 7440-47-3 T 10 02L pg/L 0.5 J+ 1.7 J+ 3.7 0.81 J+ 6.3 1.1 J+ 0.79 0.42 J+ 0.98 Cobalt 7440-48-4 D pq/L 1.8 0.5 U 0.5 U 15.1 9.5 0.2 J 0.5 U 1.3 0.94 Cobalt 7440-48-4 T 1 IMAC pg/L 1.7 0.5 U 0.14 J 15.9 11.2 0.38 J 0.15 J 1.3 0.9 Copper 7440-50-8 D pg/L 3.5 0.36 J 2.3 0.66 J 3.4 1 U 0.92 J 1 U 9.3 Copper 7440-50-8 T 1000 02L pq/L 0.32 J 3.7 6.5 0.5 J 5 0.53 J 0.69 J+ 1 U 0.53 J+ Iron 7439-89-6 D pq/L 50 U 50 U 50 U 50 U 50 U 320 J- 340 50 U 50 U Iron 7439-89-6 T 300 02L pg/L 450 37 J+ 1400 240 J+ 3800 840 590 36 J+ 920 Lead 7439-92-1 D pq/L 0.4 0.1 U 0.088 J 0.1 U 0.14 0.1 U 0.31 0.1 U 1.1 Lead 7439-92-1 T 15 02L pq/L 0.15 0.1 U 0.11 0.054 J+ 1.6 0.4 J+ 0.41 0.13 J+ 0.38 Magnesium 7439-95-4 T pq/L 2850 5970 6430 5040 4960 3300 3470 3300 3130 Manganese 7439-96-5 D pq/L 530 5 U 5 U 220 140 41 J- 50 590 270 Manganese 7439-96-5 T 50 02L pg/L 530 5 U 19 240 180 49 43 600 270 Mercury 7439-97-6 D pg/L 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 Mercury 7439-97-6 T 1 02L pq/L 0.2 U 0.2 U 0.2 U 0.2 U 0.079 J 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N pq/L 3.8 J+ 2.7 J+ 3.6 J+ 1.3 J+ 1.1 J+ 1.4 J+ 1.3 J+ 1.3 J+ 1 J+ Molybdenum 7439-98-7 D pq/L 0.5 U 2.8 5.1 0.5 U 0.5 U 1.7 2 0.49 J 0.26 J Molybdenum 7439-98-7 T pq/L 0.5 U 3 4.3 0.5 U 0.5 U 1.9 1.5 0.55 0.21 J Nickel 7440-02-0 D pq/L 3.1 0.5 U 1.3 9.6 7.5 0.45 J 0.74 0.82 1.1 Nickel 7440-02-0 T 100 02L pq/L 3 0.34 J 1.6 10.3 11.3 0.77 0.64 0.92 J+ 1.1 Potassium 7440-09-7 T pq/L 2900 J 3430 J 4210 J 5000 U 5000 U 5000 U 5000 U 3550 J 2790 J Selenium 7782-49-2 D pg/L 0.5 U 0.47 J 0.42 J 0.5 U 0.5 U 0.5 U 0.5 U 3.8 5.2 Selenium 7782-49-2 T 20 02L pq/L 0.5 U 0.55 0.39 J 0.5 U 0.4 J 0.5 U 0.5 U 3.6 4.6 Sodium 7440-23-5 T pq/L 3370 J 16100 16600 8650 7970 10900 9860 7760 5900 Strontium 7440-24-6 D pg/L 24 190 200 30 35 55 J- 64 250 250 Strontium 7440-24-6 T pq/L 26 190 210 31 38 58 61 250 250 Thallium 7440-28-0 D pq/L 0.28 0.1 U 0.1 U 0.019 J+ 0.05 J 0.1 U 0.1 U 0.025 J 0.021 J Thallium 7440-28-0 T 0.2 IMAC pg/L 0.26 0.1 U 0.1 U 0.045 J 0.072 J 0.021 J 0.1 U 0.11 0.025 J Vanadium 7440-62-2 D pq/L 1 U 4 4.4 1 U 1 U 0.3 J 1 U 0.36 J 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 0.43 J 4.5 4.1 0.53 J 8.8 1.3 0.46 J 0.42 J+ 0.33 J Zinc 7440-66-6 D pq/L 31 10 U 20 31 49 10 U 3.4 J 10 U 3.6 J Zinc 7440-66-6 T 1000 02L pq/L 51 J+ 10 U 20 J+ 33 J+ 50 J+ 2.7 J+ 4 J 10 U 5.7 J Total Dissolved Solids TDS N 500000 02L pg/L 39000 177000 172000 79000 51000 129000 112000 139000 127000 Total Organic Carbon TOC N pq/L 1000 U 1000 UJ 1100 850 J 1000 U 1000 U 1000 U 830 J 35400 Total Suspended Solids TSS N pq/L 9600 3600 5300 170000 23200 8500 10900 2500 U 24700 Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 10600 1600 J 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 5000 96200 98100 8500 9700 51300 50600 31200 19800 Alkalinity, lab ALK-LAB N pq/L 5000 107000 99700 8500 9700 51300 50600 31200 19800 Chloride 16887-00-6 N 250000 02L pg/L 7800 17800 18700 20900 18800 4900 5500 4100 3900 Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 260 100 J- 260 42 J- 41 20 U 18 J+ 20 U 32 J+ Sulfate 14808-79-8 N 250000 02L pq/L 12100 9900 11800 10200 7100 8400 8500 43400 46300 Sulfide 18496-25-8 N pq/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pq/L - - - - - 0.532 J+ - 0.5 UJ Chromium 7440-47-3 T 10 02L pg/L 1.5 J+ 4.13 J+ Iron 7439-89-6 T 300 02L pg/L 638 89.6 J+ Manganese 7439-96-5 D pq/L 42.3 615J+ Manganese 7439-96-5 T 50 02L pg/L 1 50.6 708 J+ As(III) 7784-46-5 T pg/L 0.463 J+ 0.5 UJ As(V) 10103-60-3 T pq/L 1 0.5 U 0.5 UJ Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L 0.02 U 0,048 Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L - Fe(II) 1345-25-1 T pg/L 39.6 J- 30 UJ Se(IV) 10102-18-8 T pq/L 2 U 2 U Page 9 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-6S GWA-71D GWA-7D GWA-7S GWA-7SA GWA-8D GWA-81D GWA-8S GWA-8S Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 10/2/2015 7/15/2015 10/2/2015 7/15/2015 10/2/2015 7/15/2015 9/29/2015 7/14/2015 9/29/2015 N N N N N N N N N BL-GWA-6S-NS-3Q15 GWA-7D BL-GWA-7D-NS-3Q15 GWA-7S BL-GWA-7SA-NS-3Q15 GWA-8D BL-GWA-8D-NS-3Q15 GWA-8S BL-GWA-8S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se(VI) 13410-01-0 T pq/L 2 U 1.5 J Uranium, Natural 7440-61-1 T pq/L - Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pq/L Uranium-234 13966-29-5 T pq/L Uranium-236 13982-70-2 T pg/L - - - Dissolved Oxygen DO N mg/L 3.6 6.61 6.05 2.65 2.08 1.79 0.55 3.66 3.93 Temperature TEMP N Deg C 16.5 17.43 16.2 17.6 15.8 18A 20.7 16.2 18.1 pH PH N 6.5 8.5 02L SU 4.9 9.08 8.2 4.91 4.5 7.11 6.8 5.36 5.5 Turbidity, field TURB N - NTU 9.6 5.81 7 4.92 7.9 44.1 9 5.46 8 Specific Conductivity (field) Sc N PS/cm 80.4 225 277.7 126 106.5 106 153.7 191.3 179.9 Oxidation Reduction Potential ORP N mV 286.4 157.9 165.6 150.4 303.1 12.1 0.1 -121 A 261.5 GW Depth (TOC) GW DEPTH-TOC N ft 55.26 46.14 - 30.12 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 10 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-9D GWA-91D GWA-9S GWA-9S MW-102D MW-102D MW-102S MW-102S MW-103D MW-103D MW-103S Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 1 Round 1 Round 1 Round 2 Round 1 7/18/2015 10/2/2015 7/18/2015 9/28/2015 6/17/2015 7/14/2015 6/17/2015 7/14/2015 7/12/2015 10/5/2015 7/12/2015 N N N N N N N N N N N GWA-9D BL-GWA-9D-NS-3Q15 GWA-9S BL-GWA-9S-NS-3Q15 MW-102D MW-102D MW-102S MW-102S MW-103D BL-MW-103D-NS-3Q15 MW-103S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pq/L 100 U 100 U 100 U 100 U 100 U 250 66 J 100 U 100 U Aluminum 7429-90-5 T pq/L 100 U 100 U 1500 160 130 270 110 150 100 U Antimony 7440-36-0 D pq/L 0.22 J 4.1 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC lag/L 0.18 J 3.9 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Arsenic 7440-38-2 D pq/L 0.5 U 0.15 J 0.5 U 0.5 U 0.18 J 1.9 4 5.5 79.1 Arsenic 7440-38-2 T 10 02L pg/L 0.17 J 0.12 J 4.2 0.2 J 0.24 J 3.7 7.5 37.6 79.1 Barium 7440-39-3 D pq/L 3.5 J 5.2 50 51 5 U 250 390 1 420 35 Barium 7440-39-3 T 700 02L pq/L 4.4 J 5.5 100 53 5 U 270 450 480 36 Beryllium 7440-41-7 D pq/L 0.2 U 0.2 U 0.22 0.14 J 0.2 U 0.57 2.9 2.9 0.2 U Beryllium 7440-41-7 T 4 IMAC pg/L 0.2 U 0.2 U 0.62 0.25 0.093 J 0.61 4.4 4.9 0.2 U Boron 7440-42-8 D pq/L 50 U 50 U 50 U 50 U 9200 2500 1000 1200 480 Boron 7440-42-8 T 700 02L pg/L 50 U 50 U 50 U 50 U 8800 2500 980 1100 490 Cadmium 7440-43-9 D pq/L 0.042 J 0.12 0.071 J 0.045 J 0.033 J 0.33 4.2 3.1 0.08 U Cadmium 7440-43-9 T 2 02L pg/L 0.055 J 0.11 0.15 0.055 J 0.04 J 0.31 3.8 2.9 0.08 U Calcium 7440-70-2 T pq/L 10100 10000 1070 1210 230000 60200 36000 40200 13100 Chromium 7440-47-3 D pq/L 0.37 J+ 0.71 0.64 J+ 0.39 J 0.39 J+ 0.3 J+ 0.5 U 0.19 J 0.32 J Chromium 7440-47-3 T 10 02L pg/L 1.3 2.2 J+ 3.6 1.9 J+ 0.49 J 0.36 J 0.39 J+ 1.3 0.3 J Cobalt 7440-48-4 D pq/L 1.8 4.8 2.6 1.1 0.95 401 J+ 167 103 44.7 Cobalt 7440-48-4 T 1 IMAC pg/L 2.2 4.3 6.8 1.4 1 413 79.7 81.5 43.9 Copper 7440-50-8 D pq/L 9.7 J+ 0.83 J 3.1 J+ 10.1 0.54 J 0.72 J 2 J+ 1.6 1.1 Copper 7440-50-8 T 1000 02L pq/L 1.8 0.92 J 3.3 57 0.6 J 0.92 J 0.56 J 0.91 J 1 U Iron 7439-89-6 D pq/L 50 U 50 U 50 U 50 U 430 2200 11600 17400 91700 Iron 7439-89-6 T 300 02L pg/L 65 59 2200 200 910 2200 11600 11300 92200 Lead 7439-92-1 D pq/L 1 0.056 J 0.1 U 0.1 U 0.1 U 0.5 1.2 0.16 0.1 U Lead 7439-92-1 T 15 02L pq/L 0.1 U 0.093 J 2.8 0.32 J+ 0.58 0.4 0.1 U 0.095 J 0.1 U Magnesium 7439-95-4 T pq/L 3440 3890 652 562 39700 30700 45400 48300 28300 Manganese 7439-96-5 D pq/L 20 27 90 34 2400 20800 17500 19100 9200 Manganese 7439-96-5 T 50 02L pg/L 23 28 180 45 2500 21300 14500 16300 J- 9200 Mercury 7439-97-6 D pq/L 0.2 U 0.2 U 0.12 J+ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L pq/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.11 J+ 0.2 U 0.2 UJ 0.2 U Methane 74-82-8 N pq/L 1.1 J+ 1.8 J+ 1.3 J+ 2 J+ 18 10 U 39 31 2030 Molybdenum 7439-98-7 D pq/L 0.76 0.67 0.5 U 0.27 J 0.42 J 0.5 U 0.5 U 0.5 U 0.2 J Molybdenum 7439-98-7 T pq/L 0.86 0.64 0.26 J 0.47 J 0.31 J 0.5 U 0.5 U 0.5 U 0.19 J Nickel 7440-02-0 D pq/L 1.1 J+ 3.3 1.1 J+ 0.51 J 3.4 30.2 69.1 42.8 1.4 Nickel 7440-02-0 T 100 02L pq/L 1.3 3.1 3.5 0.99 J+ 3.5 J+ 32.4 47.9 46.9 1.3 Potassium 7440-09-7 T pq/L 5000 U 5000 U 5000 U 5000 U 7070 4590 J 6620 7330 2870 J Selenium 7782-49-2 D pq/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.77 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pq/L 0.5 UJ 0.5 U 0.5 U 0.5 U 0.5 U 4.7 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T pq/L 7450 7640 5000 U 5000 U 29700 35900 26300 28400 20400 Strontium 7440-24-6 D pq/L 43 48 6 J+ 6.4 830 190 410 430 52 Strontium 7440-24-6 T pq/L 45 49 6.6 8.1 860 200 410 430 56 Thallium 7440-28-0 D pq/L 0.1 U 0.1 U 0.094 J 0.098 J 0.1 U 0.4 3.9 4.4 0.16 Thallium 7440-28-0 T 0.2 IMAC pg/L 0.1 U 0.1 U 0.23 0.091 J 0.1 U 0.3 3.6 3.9 0.16 Vanadium 7440-62-2 D pq/L 0.44 J 0.72 J 1 U 1 U 0.39 J 1 U 1 U 1 U 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 1 0.33 J 7.2 0.29 J 1 U 1 U 1 U 1 U 1 U Zinc 7440-66-6 D pq/L 5.9 J+ 20 7 J+ 39 11 46 30 27 4.5 J Zinc 7440-66-6 T 1000 02L pq/L 5.2 J 23 13 64 6.8 J+ 48 21 76 10 U Total Dissolved Solids TDS N 500000 02L pg/L 93000 80000 30000 25000 U 1270000 676000 661000 794000 448000 Total Organic Carbon TOC N I pq/L 1000 U 1000 U 1000 U 1000 U 1100 540 J 1000 U 1000 U 730 J Total Suspended Solids TSS N pq/L 5500 196000 146000 5100 2600 U 2500 U 5000 U 12000 89000 Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 5000 U 5000 U 5000 U 10000 U 10000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 34400 35800 6700 6800 76000 10000 U 7900 2700 J 10500 Alkalinity, lab ALK-LAB N pq/L 34400 35800 6700 6800 77000 10000 U 7900 2700 J 10500 Chloride 16887-00-6 N 250000 02L pg/L 5900 9700 1300 1400 407000 247000 280000 - 204000 Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 980 1000 20 U 32 20 U 42 14 J 19 J 20 U Sulfate 14808-79-8 N 250000 02L pq/L 5500 6700 940 J 820 J 82800 3400 1000 U - 1000 U Sulfide 18496-25-8 N pq/L 100 U 100 U 100 UJ 100 U 500 U 500 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pq/L - - - - - 0.5 UJ - 0.5 UJ - - - Chromium 7440-47-3 T 10 02L pg/L 2.84 J+ 3.8 J+ Iron 7439-89-6 T 300 02L pg/L 914 J+ 304 J+ Manqanese 7439-96-5 D pq/L 2730J+ 20200J+ Manganese 7439-96-5 T 50 02L pg/L 3180 J+ 19000 J+ As(III) 7784-46-5 T 0.5 UJ 0.5 UJ As(V) 10103-60-3 T 0.5 UJ 0.5 UJ Chromium (VI) 18540-29-9 D 0.07 DHHS 0.02 U 002 UChromium (VI) 18540-29-9 T 0.07 DHHS flpq/L - I1345-25-1 T 16.1 J+Se(IV) 10102-18-8 T 2 U 2 U Page 11 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-9D GWA-91D GWA-9S GWA-9S MW-102D MW-102D MW-102S MW-102S MW-103D MW-103D MW-103S Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 1 Round 1 Round 1 Round 2 Round 1 7/18/2015 10/2/2015 7/18/2015 9/28/2015 6/17/2015 7/14/2015 6/17/2015 7/14/2015 7/12/2015 10/5/2015 7/12/2015 N N N N N N N N N N N GWA-9D BL-GWA-9D-NS-3Q15 GWA-9S BL-GWA-9S-NS-3Q15 MW-102D MW-102D MW-102S MW-102S MW-103D BL-MW-103D-NS-3Q15 MW-103S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se(VI) 13410-01-0 T pq/L - 2 U - 2 U Uranium, Natural 7440-61-1 T pq/L 0.697 0.215 Radium-226 13982-63-3 T pCi/L 2.58 4.13 Radium-228 15262-20-1 T pCi/L 3 U 3 U Uranium-233 13968-55-3 T pq/L 0.05 U 0.05 U Uranium-234 13966-29-5 T pq/L 0.05 U 0.05 U Uranium-236 13982-70-2 T pq/L 0.05 U 0.05 U - - - - Dissolved Oxygen DO N mg/L 3.48 1.7 4.12 4.5 3.16 0.52 2.2 0.52 2.21 0.5 0.25 Temperature TEMP N - Deg C 24.4 13.5 31 22.5 16.8 19.5 15.9 18.48 18.7 17.8 21.7 pH PH N 6.5 8.5 02L SU 6.36 6.3 5.49 5.5 7.1 7.12 5 4.75 5.42 5.5 6.39 Turbidity, field TURB N - NTU 1.77 9.9 42.16 12.5 2.4 7.06 2.3 2 7.39 9.6 4.73 Specific Conductivity (field) Sc N pS/cm 101.8 132.1 23.4 24.4 1448 1750 815 697 827 1001 741 Oxidation Reduction Potential ORP N IV 211.5 131.7 317.1 114.5 -48.3 318.9 201.7 283.8 176 86.3 -44.8 GW Depth (TOC) GW DEPTH-TOC N ft 50.6 1 42.94 - - - i i - Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 12 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-103S MW-104D MW-104S MW-200BR MW-200BR MW-200D MW-200D MW-200S Round 2 Round 2 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 10/5/2015 10/2/2015 10/2/2015 7/14/2015 10/5/2015 7/14/2015 10/5/2015 7/14/2015 N N N N N N N N BL-MW-103S-NS-3Q15 BL-MW-104D-NS-3Q15 BL-MW-104S-NS-3Q15 MW-200BR BL-MW-200BR-NS-3Q15 MW-200D BL-MW-200D-NS-3Q15 MW-200S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pq/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 460 Aluminum 7429-90-5 T pq/L 490 1800 320 100 U 100 U 71 J 240 3400 Antimony 7440-36-0 D pq/L 0.5 U 0.17 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC lag/L 0.5 U 0.2 J 0.26 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Arsenic 7440-38-2 D pq/L 86.7 0.12 J 0.5 U 1.9 1.5 0.9 0.79 3.5 Arsenic 7440-38-2 T 10 02L pg/L 83.6 0.45 J 0.14 J 1.7 1.7 1.1 1.4 5.7 Barium 7440-39-3 D pq/L 43 18 64 5 U 5 U 4.8 J 1 8.1 25 Barium 7440-39-3 T 700 02L pq/L 43 39 77 5 U 5 U 5.2 8.7 35 Beryllium 7440-41-7 D pq/L 0.2 U 0.2 U 0.13 J 0.13 J 0.14 J 0.2 U 0.086 J 0.23 Beryllium 7440-41-7 T 4 IMAC pg/L 0.17 J 0.16 J 0.18 J 0.11 J 0.16 J 0.2 U 0.12 J 0.32 Boron 7440-42-8 D pq/L 650 50 U 50 U 67 83 550 1200 50 U Boron 7440-42-8 T 700 02L pg/L 580 50 U 50 U 68 72 590 1100 50 U Cadmium 7440-43-9 D pq/L 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.035 J 0.1 0.12 Cadmium 7440-43-9 T 2 02L pg/L 0.08 U 0.08 U 0.045 J 0.08 U 0.08 U 0.053 J 0.12 0.12 Calcium 7440-70-2 T pq/L 16300 9200 2670 52500 52900 48100 58900J+ 5860 Chromium 7440-47-3 D pq/L 0.43 J 1 0.96 0.27 J 0.33 J 0.85 0.45 J 2.4 Chromium 7440-47-3 T 10 02L pg/L 3.3 8.9 10.9 0.23 J 0.29 J 2.3 0.49 J 4.1 Cobalt 7440-48-4 D pq/L 55.5 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 2.1 Cobalt 7440-48-4 T 1 IMAC pg/L 55.3 1 0.62 0.5 U 0.5 U 0.5 U 0.22 J 2.4 Copper 7440-50-8 D pq/L 0.34 J 7.6 10.1 1 U 6.9 1.1 1.9 3.1 Copper 7440-50-8 T 1000 02L pq/L 0.71 J 4.8 0.91 J 1 U 1 U 1 UJ 2.7 4.4 Iron 7439-89-6 D pq/L 94300 50 U 50 U 180 200 50 U 50 U 250 Iron 7439-89-6 T 300 02L pg/L 89600 2400 430 190 190 100 280 4300 Lead 7439-92-1 D pq/L 0.085 J 1.1 1.3 0.1 U 1.3 0.1 U 0.36 1.4 Lead 7439-92-1 T 15 02L pq/L 0.75 1 0.57 0.1 U 0.1 U 0.066 J 0.36 2.3 Magnesium 7439-95-4 T pq/L 32300 4600 588 6690 6760 11800 16200 J+ 1800 Manganese 7439-96-5 D pq/L 11600 5 U 3.3J 110 130 13 46 330 Manganese 7439-96-5 T 50 02L pg/L 10900 J- 110 54 110 110 20 95 300 Mercury 7439-97-6 D pq/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L pq/L 0.2 UJ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N pq/L 2130 1.4 J+ 1.3 J+ 49.7 130 0.75 J+ 2 J+ 1.4 J+ Molybdenum 7439-98-7 D pq/L 0.22 J 2.6 0.11 J 0.45 J 0.45 J 0.87 0.41 J 0.19 J Molybdenum 7439-98-7 T pq/L 0.15 J 2.8 0.29 J 0.42 J 0.51 1.1 0.3 J 0.26 J Nickel 7440-02-0 D pq/L 1.9 0.74 0.75 0.5 U 0.27 J 0.49 J 1.3 2.2 Nickel 7440-02-0 T 100 02L pq/L 3.3 3.8 7.8 0.5 U 0.5 U 0.62 1.5 3.1 Potassium 7440-09-7 T pq/L 3450 J 3490 J 2620 J 5000 U 5000 U 3070 J 3930 J+ 5000 U Selenium 7782-49-2 D pq/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pq/L 0.5 U 0.26 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.22 J Sodium 7440-23-5 T pq/L 23700 11600 5000 U 11200 11300 10400 12700 J+ 5440 Strontium 7440-24-6 D pq/L 68 110 27 170 180 190 260 35 Strontium 7440-24-6 T pq/L 63 120 29 170 150 200 250 40 Thallium 7440-28-0 D pq/L 0.2 0.1 U 0.095 J 0.1 U 0.1 U 0.043 J 0.039 J 0.06 J Thallium 7440-28-0 T 0.2 IMAC pg/L 0.23 0.072 J 0.18 0.1 U 0.1 U 0.037 J 0.037 J 0.062 J Vanadium 7440-62-2 D pq/L 1 U 3.2 0.3 J 1 U 1 U 0.32 J 1 U 5 Vanadium 7440-62-2 T 0.3 IMAC pg/L 1 7.7 1 1 U 1 U 0.32 J 1 U 8.3 Zinc 7440-66-6 D pq/L 5.5 J 5.4 J 16 10 U 11 10 U 10 U 10 U Zinc 7440-66-6 T 1000 02L I pq/L 15 25 110 3 J+ 16 7.8 J+ 3 J 4.5 J+ Total Dissolved Solids TDS N 500000 02L pg/L 667000 106000 34000 267000 263000 368000 361000 122000 Total Organic Carbon TOC N pq/L 1000 U 1000 U 1000 U 1000 U 1000 U 20500 J- 1000 U 4700 Total Suspended Solids TSS N pq/L 122000 98500 13600 2500 U 2500 U 2500 U 5000 U 2500 U Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 17000 62400 15100 124000 121000 64900 46800 13300 Alkalinity, lab ALK-LAB N pq/L 17000 62400 15100 124000 121000 64900 46800 13300 Chloride 16887-00-6 N 250000 02L pg/L - 1500 1400 35400 39400 83500 121000 11200 Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 20 U 110 110 20 U 20 U 25 23 22 Sulfate 14808-79-8 N 250000 02L pq/L - 2500 1000 U - 6600 4800 6600 - Sulfide 18496-25-8 N pq/L 100 U 100 U 100 UJ 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pq/L - - - 1.6 J+ - 0.901 J+ - 0.6 J+ Chromium 7440-47-3 T 10 02L pg/L 3.04 J+ 3.94 J+ 8.45 J+ Iron 7439-89-6 T 300 02L pg/L 345 J+ 161 J+ 2850 J+ Manganese 7439-96-5 D pq/L 115 J+ 13.2 J+ 329 J+ Manganese 7439-96-5 T 50 02L pg/L 131 J+ 17.6 J+ 475 J+ As(III) 7784-46-5 T pq/L 1.43 J+ 0.5 UJ 0.5 UJ As(V) 1 10103-60-3 T I I pq/L 1 0.168 J+ 0.901 J+ 0.6 J+ Chromium (VI) 18540-29-9 D 0.07 1 DHHS pg/L 0.02 U 0.084 0.02 U Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L - - - Fe(II) 1345-25-1 T pq/L 20.8 J+ 30 UJ 197 J+ Se(IV) 10102-18-8 T pq/L 2 U 2 U 2 U Page 13 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-103S MW-104D MW-104S MW-200BR MW-200BR MW-200D MW-200D MW-200S Round 2 Round 2 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 10/5/2015 10/2/2015 10/2/2015 7/14/2015 10/5/2015 7/14/2015 10/5/2015 7/14/2015 N N N N N N N N BL-MW-103S-NS-3Q15 BL-MW-104D-NS-3Q15 BL-MW-104S-NS-3Q15 MW-200BR BL-MW-200BR-NS-3Q15 MW-200D BL-MW-200D-NS-3Q15 MW-200S Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se(VI) 13410-01-0 T pq/L 2 U 2 U 2 U Uranium, Natural 7440-61-1 T pq/L 0.829 0.652 0.502 Radium-226 13982-63-3 T pCi/L 1.43 9.84 1.74 Radium-228 15262-20-1 T pCi/L 3.38 J+ 3 U 3 U Uranium-233 13968-55-3 T pq/L 0.05 U 0.05 U 0.05 U Uranium-234 13966-29-5 T pq/L 0.05 U 0.05 U 0.05 U Uranium-236 13982-70-2 T pg/L 0.05 U - 0.05 U - 0.05 U Dissolved Oxygen DO N mg/L 0.1 5.9 6.45 0.13 0.4 0.96 0.4 1.54 Temperature TEMP N Deg C 21.7 14.4 13.8 16.9 14.2 17.8 16.3 20.86 pH PH N 6.5 8.5 02L SU 6.5 6.9 5.07 7.37 7.5 6.3 6.1 5.59 Turbidity, field TURB N - NTU 30.5 313.1 12.17 1.04 0.1 3.32 9.5 115 Specific Conductivity (field) Sc N PS/cm 905 130.2 30.1 396 398 461 562.5 86 Oxidation Reduction Potential ORP N mV -127.5 185.7 255 5.2 -108.3 443 -22.6 203.9 GW Depth (TOC) GW DEPTH-TOC N ft 44.3 42.97 0 - Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 14 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-200S MW-201D MW-201D MW-203BR MW-203BR MW-203D MW-203D MW-203S MW-203S Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 10/5/2015 7/18/2015 9/29/2015 7/18/2015 9/30/2015 7/18/2015 9/29/2015 7/18/2015 9/29/2015 N N N N N N N N N BL-MW-200S-NS-3Q15 MW-201D BL-MW-201D-NS-3Q15 MW-203BR BL-MW-203BR-NS-3Q15 MW-203D BL-MW-203D-NS-3Q15 MW-203S BL-MW-203S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pq/L 170 100 U 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T pg/L 1900 440 300 150 290 68 J Antimony 7440-36-0 D pq/L 0.5 U 0.5 U 0.24 J 0.5 U 0.48 J 0.19 J Antimony 7440-36-0 T 1 IMAC lag/L 0.19 J 0.5 U 0.18 J 0.21 J 0.28 J 0.26 J Arsenic 7440-38-2 D lag/L 4.2 0.5 U 0.23 J 0.15 J 0.5 U 0.5 U Arsenic 7440-38-2 T 10 02L lag/L 5.6 0.5 U 0.41 J 0.22 J 0.19 J 0.5 U Barium 7440-39-3 D I pq/L 44 4.3 J 3.8 J 5 U 6.6 45 Barium 7440-39-3 T 700 02L pq/L 45 6.3 8 5 9.1 47 Beryllium 7440-41-7 D pq/L 0.23 0.2 U 0.2 U 0.2 U 0.2 U 0.12 J Beryllium 7440-41-7 T 4 IMAC pg/L 0.35 0.2 U 0.068 J 0.2 U 0.2 U 0.13 J Boron 7440-42-8 D pq/L 57 50 U 50 U 50 U 50 U 50 U Boron 7440-42-8 T 700 02L pg/L 25 J 50 U 50 U 50 U 50 U 50 U Cadmium 7440-43-9 D pq/L 0.033 J 0.08 U 0.031 J 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T 2 02L I pg/L 0.056 J 0.08 U 0.035 J 0.08 U 0.08 U 0.041 J Calcium 7440-70-2 T pq/L 9190 J+ 15200 11600 10900 7570 3220 Chromium 7440-47-3 D pg/L 0.68 2.3 J+ 0.76 J+ 1.1 1.6 J+ 0.53 J+ Chromium 7440-47-3 T 10 02L pg/L 1.6 10.3 3.1 12.3 3 J+ 2 J+ Cobalt 7440-48-4 D pq/L 13.9 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Cobalt 7440-48-4 T 1 IMAC pg/L 14.3 0.33 J 0.24 J 0.22 J 0.27 J 0.5 U Copper 7440-50-8 D pg/L 0.68 J 0.43 J+ 8.7 J+ 2.2 0.36 J+ 2 J+ Copper 7440-50-8 T 1000 02L I pq/L 3.7 2 J+ 0.98 J 0.98 J+ 1.6 J+ 0.24 J+ Iron 7439-89-6 D pq/L 3300 50 U 50 U 50 U 50 U 50 U Iron 7439-89-6 T 300 02L pg/L 5200 630 240 200 690 74 Lead 7439-92-1 D pq/L 0.29 0.1 U 1.1 0.22 0.1 U 0.22 J+ Lead 7439-92-1 T 15 02L pq/L 1 2 0.29 0.53 0.29 J+ 0.35 J+ 0.23 J+ Magnesium 7439-95-4 T pq/L 3050 J+ 5840 5100 5610 3860 586 Manganese 7439-96-5 D pq/L 430 4 J 19 4 J 3.4 J 3.8 J Manganese 7439-96-5 T 50 02L pg/L 370 15 24 9.1 20 7.6 Mercury 7439-97-6 D pg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L pq/L 0.2 U 0.2 U 0.2 U 0.2 UJ 0.2 U 0.2 U Methane 74-82-8 N pq/L 8.1 J+ 1.4 J+ 1 J+ 2.3 J+ 0.97 J+ 1.5 J+ Molybdenum 7439-98-7 D pq/L 0.5 U 0.79 3.3 3.2 1.5 0.5 U Molybdenum 7439-98-7 T pq/L 0.14 J 0.78 3.3 3.2 1.6 0.5 U Nickel 7440-02-0 D pq/L 2.5 3.6 0.62 J+ 0.86 0.36 J+ 0.63 J+ Nickel 7440-02-0 T 100 02L pq/L 3.3 7.6 1.5 7.4 0.84 J+ 1.5 J+ Potassium 7440-09-7 T pq/L 2900 J+ 5000 U 2690 J 5000 U 5000 U 5000 U Selenium 7782-49-2 D pg/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pq/L 0.25 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T pq/L 6490 J+ 6580 9880 8850 7180 5000 U Strontium 7440-24-6 D pg/L 54 57 40 44 34 25 J+ Strontium 7440-24-6 T pq/L 49 58 45 46 35 31 Thallium 7440-28-0 D pq/L 0.033 J 0.1 U 0.1 U 0.1 U 0.1 U 0.03 J+ Thallium 7440-28-0 T 0.2 IMAC pg/L 0.071 J 0.1 U 0.1 U 0.1 U 0.1 U 0.036 J+ Vanadium 7440-62-2 D pq/L 1.6 0.95 J+ 2.8 2.9 3.4 J+ 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 2.7 1.6 3.9 3.1 5 0.72 J Zinc 7440-66-6 D pq/L 4.9 J 2.7 J+ 4.5 J+ 25 3 J+ 16 J+ Zinc 7440-66-6 T 1000 02L pq/L 8 J 3.3 J 4.4 J 24 11 4.7 J+ Total Dissolved Solids TDS N 500000 02L pg/L 127000 128000 110000 108000 104000 37000 Total Organic Carbon TOC N pq/L 10700 520 J 1000 U 1000 U 1000 U 1000 U Total Suspended Solids TSS N pq/L 7600 48200 108000 38900 225000 10900 Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 13500 65900 54700 55400 41600 9000 Alkalinity, lab ALK-LAB N pq/L 13500 65900 54700 55400 41600 9000 Chloride 16887-00-6 N 250000 02L pg/L 16900 3200 3100 10900 1800 2100 Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 20 U 190 360 290 370 210 Sulfate 14808-79-8 N 250000 02L pq/L 14200 1900 3300 2500 1700 1000 U Sulfide 18496-25-8 N pq/L 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pq/L - - 0.5 U - - - 0.5 U - 0.5 U Chromium 7440-47-3 T 10 02L pg/L 4.94 2.73 J+ 1.62 J+ Iron 7439-89-6 T 300 02L pg/L 365 145 95.2 J Manganese 7439-96-5 D pq/L 1.72 J+ 1.31 J+ 6.01 J+ Manganese 7439-96-5 T 50 02L pg/L 14.2 10.1 17 As(III) 7784-46-5 T pg/L 0.209 J+ 0.209 J+ 0.209 J+ As(V) 10103-60-3 T I pq/L 0.5 U 0.5 U 0.5 U Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L - - - Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L 2.9 J+ 1.5 J+ 0.31 J+ Fe(II) 1345-25-1 T pg/L 11.4 J- 18.5 J- 32.5 J- Se(IV) 10102-18-8 T pq/L 2 U 2 U 2 U Page 15 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-200S MW-201D MW-201D MW-203BR MW-203BR MW-203D MW-203D MW-203S MW-203S Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 10/5/2015 7/18/2015 9/29/2015 7/18/2015 9/30/2015 7/18/2015 9/29/2015 7/18/2015 9/29/2015 N N N N N N N N N BL-MW-200S-NS-3Q15 MW-201D BL-MW-201D-NS-3Q15 MW-203BR BL-MW-203BR-NS-3Q15 MW-203D BL-MW-203D-NS-3Q15 MW-203S BL-MW-203S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se(VI) 13410-01-0 T pq/L 2 UJ 2 UJ 2 UJ Uranium, Natural 7440-61-1 T pq/L Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pq/L Uranium-234 13966-29-5 T pq/L Uranium-236 13982-70-2 T pg/L - - Dissolved Oxygen DO N mg/L 0.2 5.36 5.47 3 3.42 3.25 5.6 6.23 6 Temperature TEMP N - Deg C 18 18.6 21.5 23.5 22.4 23.3 21.9 22.7 22.1 pH PH N 6.5 8.5 02L SU 5.5 6.2 6.1 6.82 6.6 6.49 6.5 5.62 5.7 Turbidity, field TURB N - NTU 43.1 17.4 9.25 18.05 9.18 22.41 4.81 5.15 8.69 Specific Conductivity (field) Sc N PS/cm 137.9 154.4 132.8 136.9 157.5 86.8 94.2 33.2 37.4 Oxidation Reduction Potential ORP N mV -47.7 122.3 175.6 219.7 151.5 190.7 180.8 305.8 212.7 GW Depth (TOC) GW DEPTH-TOC N ft 4.75 - - - - - - - Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 16 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-204D MW-204D MW-204S MW-204S Round 1 Round 2 Round 1 Round 2 7/18/2015 9/29/2015 7/18/2015 9/30/2015 N N N N MW-204D BL-MW-204D-NS-3Q15 MW-204S BL-MW-204S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pq/L 100 U 100 U Aluminum 7429-90-5 T pq/L 120 88 J Antimony 7440-36-0 D pq/L 0.5 UJ 0.5 U Antimony 7440-36-0 T 1 IMAC lag/L 0.22 J 0.5 U Arsenic 7440-38-2 D pq/L 0.5 U 0.17 J Arsenic 7440-38-2 T 10 02L pg/L 0.5 U 0.15 J Barium 7440-39-3 D pq/L 31 130 Barium 7440-39-3 T 700 02L pq/L 32 130 Beryllium 7440-41-7 D pq/L 0.2 U 0.07 J Beryllium 7440-41-7 T 4 IMAC pg/L 0.2 U 0.084 J Boron 7440-42-8 D pq/L 50 U 50 U Boron 7440-42-8 T 700 02L pg/L 50 U 50 U Cadmium 7440-43-9 D pq/L 0.035 J 0.11 Cadmium 7440-43-9 T 2 02L pg/L 0.036 J 0.11 Calcium 7440-70-2 T pq/L 1440 1380 Chromium 7440-47-3 D pq/L 0.35 J+ 1.8 J+ Chromium 7440-47-3 T 10 02L pg/L 2 J+ 9.2 Cobalt 7440-48-4 D pq/L 6.1 17.8 Cobalt 7440-48-4 T 1 IMAC pg/L 5.7 16.5 Copper 7440-50-8 D I pq/L 1.2 J+ 1.2 J+ Copper 7440-50-8 T 1000 02L pq/L 1.2 J+ 1.7 J+ Iron 7439-89-6 D pq/L 35 J 1700 Iron 7439-89-6 T 300 02L pg/L 290 1800 Lead 7439-92-1 D pq/L 0.1 U 0.1 U Lead 7439-92-1 T 15 02L pq/L 0,098 J 0.067 J Magnesium 7439-95-4 T pq/L 1200 1490 Manqanese 7439-96-5 D pq/L 70 570 Manganese 7439-96-5 T 50 02L pg/L 73 550 Mercury 7439-97-6 D pq/L 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L pq/L 0.2 U 0.2 U Methane 74-82-8 N pq/L 1 J+ 85.7 Molybdenum 7439-98-7 D pq/L 0.5 U 0.32 J Molybdenum 7439-98-7 T pq/L 0.1 J 0.3 J Nickel 7440-02-0 D pq/L 2 9.8 Nickel 7440-02-0 T 100 02L pq/L 2.4 8.2 Potassium 7440-09-7 T pq/L 5000 U 5000 U Selenium 7782-49-2 D pq/L 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pq/L 0.5 U 0.5 U Sodium 7440-23-5 T pq/L 2870 J 3060 J Strontium 7440-24-6 D pq/L 9.7 13 Strontium 7440-24-6 T pq/L 9.7 13 Thallium 7440-28-0 D pq/L 0,049 J 0.09 J Thallium 7440-28-0 T 0.2 IMAC pg/L 0.053 J+ 0.11 J+ Vanadium 7440-62-2 D pq/L 0.53 J+ 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 1 U 1 U Zinc 7440-66-6 D pq/L 5.3 J+ 15 J+ Zinc 7440-66-6 T 1000 02L pq/L 6.2 J 9.5 J Total Dissolved Solids TDS N 500000 02L pg/L 42000 49000 Total Organic Carbon TOC N pq/L 1000 U 1000 U Total Suspended Solids TSS N pq/L 6400 5200 Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 11200 14500 Alkalinity, lab ALK-LAB N pq/L 11200 14500 Chloride 16887-00-6 N 250000 02L pg/L 1200 2300 Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 36 J+ 230 Sulfate 14808-79-8 N 250000 02L pq/L 2700 2100 Sulfide 18496-25-8 N pq/L 100 U - 100 U - Arsenic 7440-38-2 T 10 02L pq/L - 0.5 U - 0.5 UJ Chromium 7440-47-3 T 10 02L pg/L 1.28 J+ 0.808 J+ Iron 7439-89-6 T 300 02L pg/L 133 1820 Manganese 7439-96-5 D pq/L 91.6 576 Manganese 7439-96-5 T 50 02L pg/L 93.2 615 As(III) 7784-46-5 T pq/L 0.209 J+ 0.5 UJ As(V) 10103-60-3 T I pq/L 1 0.5 U 0.5 UJ Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L - - Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L 0.047 J+ 0.02 UJ Fe(II) 1345-25-1 T pq/L 65.4 J- 1710 J- Se(IV) 10102-18-8 T pq/L 2 U 2 U Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 17 of 18 Table 2-7 Groundwater Analytical Results Upgradient of Ash Basin - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-204D MW-204D MW-204S MW-204S Round 1 Round 2 Round 1 Round 2 7/18/2015 9/29/2015 7/18/2015 9/30/2015 N N N N MW-204D BL-MW-204D-NS-3Q15 MW-204S BL-MW-204S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Se(VI) 13410-01-0 T pq/L 2 UJ 2 UJ Uranium, Natural 7440-61-1 T pq/L Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pq/L Uranium-234 13966-29-5 T pq/L Uranium-236 13982-70-2 T pq/L - - - Dissolved Oxygen DO N mg/L 4.89 4.2 3.17 2.4 Temperature TEMP N - Deg C 17.5 22.8 17.9 20.5 pH PH N 6.5 8.5 02L SU 5.48 5.6 5.37 5.36 Turbidity, field TURB N - NTU 5.1 7.2 6.75 9.64 Specific Conductivity (field) Sc N PS/cm 38 43 50 51.3 Oxidation Reduction Potential ORP N I mV 108 68 134 106.9 GW Depth (TOC) GW DEPTH-TOC N ft - 28.73 - 27.59 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 18 of 18 Table 2-8 Groundwater Analytical Results Within Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: ABAD AB-1D ABAS AB-1S AB-2D AB-2D AB-2S AB-2S AB-31D AB-3D A113-3S AB-3S AB-4BR Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1- 7/10/2015 10/1/2015 7/10/2015 10/1/2015 7/15/2015 10/1/2015 7/15/2015 9/30/2015 7/10/2015 9/28/2015 7/11/2015 9/28/2015 7/16/2015 N N N N N N N N N N N N N ABAD BL-AB-1D-NS-3Q15 AB-1S BL-AB-1S-NS-3Q15 AB-2D BL-AB-2D-NS-3Q15 AB-2S BL-AB-2S-NS-3Q15 AB-313 BL-AB-3D-NS-3Q15 AB-3S BL-AB-3S-NS-3Q15 A13-41311 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pg/L 83 J 80 J 54 J 100 U 86 J 100 U 2500 2300 100 U 100 U 100 U 100 U 500 Aluminum 7429-90-5 T pg/L 1200 1000 9600 2700 260 140 3300 6700 130 70 J 270 3400 1100 Antimony 7440-36-0 D pg/L 0.5 U 0.5 U 0.5 U 0.5 U 1.5 0.22 J 21.4 - 0.5 U 4.2 0.5 U 0.5 U 2.6 Antimony 7440-36-0 T 1 IMAC I pg/L 0.5 U 0.5 U 0.5 U 0.5 U 0.75 0.35 J 8.1 3.4 0.5 U 4.5 0.5 U 0.5 U 0.71 Arsenic 7440-38-2 D pg/L 2.2 3.1 1.2 2 1.1 J+ 2 7.2 - 6.3 8.5 0.48 J 0.53 0.58 Arsenic 7440-38-2 T 10 02L pg/L 3.4 3.4 39 44.6 0.9 2.4 6.8 7.4 6.6 10.6 0.76 2.7 0.65 Barium 7440-39-3 D pg/L 170 1 190 76 100 71 96 6.9 7 15 19 140 160 26 Barium 7440-39-3 T 700 02L pg/L 190 180 100 100 74 88 9.8 33 14 19 140 180 24 Beryllium 7440-41-7 D pg/L 0.7 0.66 0.2 U 0.22 0.68 0.44 0.1 J - 0.2 U 0.2 U 0.068 J 0.2 U 0.2 U Beryllium 7440-41-7 T 4 IMAC pg/L 0.9 0.72 0.31 0.36 0.35 0.39 0.17 J 0.21 0.2 U 0.2 U 0.071 J 0.2 0.2 U Boron 7440-42-8 D pg/L 13200 J+ 15500 13100 18600 14900 12300 250 J+ 170 2500 2200 J- 13300 16000 J- 38 J Boron 7440-42-8 T 700 02L pg/L 12800 J- 15100 12700 18100 11400 1 11900 200 1 160 2400 2300 13200 16600 54 Cadmium 7440-43-9 D pg/L 0.24 0.21 0.08 U 0.08 U 0.52 0.026 J 0.08 U - 0.08 U 0.08 U 0.045 J 0.042 J 0.08 U Cadmium 7440-43-9 T 2 02L pg/L 0.29 0.29 0.045 J 0.08 U 0.6 0.058 J 0.04 J 0.08 U 0.08 U 0.032 J 0.046 J 0.037 J 0.08 U Calcium 7440-70-2 T pg/L 198000 211000 210000 228000 223000 204000 71500 54600 142000 141000 211000 225000 79300 Chromium 7440-47-3 D pg/L 0.4 J 0.29 J 12.8 0.29 J 1.1 J+ 0.38 J 14 - 0.39 J 0.46 J 3 0.5 U 8.3 J+ Chromium 7440-47-3 T 10 02L pg/L 3.4 1 2.9 J+ 39.7 3.9 J+ 1.1 J+ 1.5 J+ 19.4 17 1.9 1.8 J+ 5.8 1.3 J+ 2.6 Cobalt 7440-48-4 D pg/L 40.4 37.8 31.7 33.8 109 91.6 0.16 J - 1.8 1.9 10.9 11.2 0.5 U Cobalt 7440-48-4 T 1 IMAC pg/L 40.9 37.1 41 39 108 89.2 0.37 J 2.9 2.1 2 11.3 14.8 0.5 U Copper 7440-50-8 D pg/L 0.25 J+ 1.4 0.35 J+ 3.2 12.4 1 U 5.1 - 0.33 J+ 0.64 J 0.46 J+ 5.6 1.8 J+ Copper 7440-50-8 T 1000 02L pg/L 2 1.7 2.7 5.1 6.7 1.2 12.3 6 J+ 0.61 J 0.52 J 0.52 J 1.5 1 U Iron 7439-89-6 D pg/L 91 100 130 50 U 110 1400 50 U 50 U 50 U 190 50 U 50 U 50 U Iron 7439-89-6 T 300 02L pg/L 1600 1400 12800 3900 420 J+ 1500 510 J+ 6000 280 380 320 4100 89 Lead 7439-92-1 D pg/L 0.066 J 1 0.27 J 0.1 U 0.34 0.19 0.1 U 0.1 U - 0.049 J 0.11 0.052 J 0.74 0.1 U Lead 7439-92-1 T 15 02L pg/L 0.79 2 2.6 0.5 UJ 0.19 1 0.18 J+ 0.28 1 5 0.37 0.2 0.22 3.5 0.051 J Magnesium 7439-95-4 T pg/L 51900 54000 55000 59900 50000 51000 63.1 J 528 30200 30100 57800 63600 2900 Manganese 7439-96-5 D pg/L 2200 J- 2200 2300 2400 20200 14400 4.4 J 5 U 28 84 4300 4400 5 U Manganese 7439-96-5 T 50 02L pg/L 2300 2100 2500 2200 14800 14500 15 130 35 88 4000 4500 5 U Mercury 7439-97-6 D pg/L 0.2 U 0.2 UJ 0.2 U 0.2 UJ 0.2 U 0.2 UJ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L pg/L 0.12 J+ 0.2 U 0.093 J+ 0.2 U 0.2 U 0.2 U 0.2 U 0.2 UJ 0.079 J+ 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N pg/L 5.9 J+ 29.2 8.8 J+ 37.1 28.9 32.6 399 255 J+ 7.6 J+ 7.4 J+ 6.7 J+ 26.1 1.3 J+ Molybdenum 7439-98-7 D pg/L 0.35 J 0.3 J 0.29 J 0.5 U 0.65 0.39 J 13.3 - 5.5 5.3 3.7 4.7 14.7 Molybdenum 7439-98-7 T pg/L 0.45 J 0.31 J 0.55 0.26 J 0.68 J+ 0.49 J 16.7 7.8 5.4 6.1 3.8 3 9.8 Nickel 7440-02-0 D pg/L 8.9 6.7 23.7 2.5 30.1 26.2 0.26 J - 2 1.9 3.2 0.75 0.21 J+ Nickel 7440-02-0 T 100 02L pg/L 10.6 8.5 28.9 6.2 29.6 25.3 0.63 J+ 3 J+ 3.2 2.9 3.7 1.7 0.34 J Potassium 7440-09-7 T pg/L 4510 J 5050 4230 J 5180 5960 5600 5000 U 2720 J 4360 J 4780 J 7770 8900 7480 Selenium 7782-49-2 D pg/L 1.1 4.6 0.63 3.3 0.68 0.9 1.1 - 0.5 U 0.5 U 0.4 J 0.64 0.67 Selenium 7782-49-2 T 20 02L pg/L 1.2 4.3 0.74 3.3 0.28 J 0.84 1.3 0.91 0.5 U 0.5 U 0.38 J 0.44 J 0.35 J Sodium 7440-23-5 T pg/L 10500 12400 8840 11700 14400 17400 19400 10600 21100 22700 11100 14000 12400 Strontium 7440-24-6 D pg/L 660 710 770 850 890 900 63 53 410 420 750 880 290 Strontium 7440-24-6 T pg/L 700 640 790 740 940 810 69 54 420 430 750 850 330 Thallium 7440-28-0 D pg/L 0.3 0.38 J 0.22 0.24 0.35 0.4 0.1 U - 0.04 J 0.1 U 0.35 0.36 0.016 J Thallium 7440-28-0 T 0.2 IMAC pg/L 0.42 0.38 J 0.31 0.48 J 0.4 0.43 0.1 U 0.11 0.043 J 0.016 J 0.37 0.5 0.1 U Vanadium 7440-62-2 D pg/L 1 U 1 U 1 U 1 U 0.5 J 1 U 46.6 - 0.53 J 1 U 1 U 1 U 8 Vanadium 7440-62-2 T 0.3 IMAC pg/L 2.5 1.4 2.5 3.7 1 U 1 U 47.2 41.6 0.7 J 0.52 J 1 U 1.2 4.1 Zinc 7440-66-6 D pg/L 9.7 J 12 4.1 J 32 54 41 5.3 J+ 10 U 3.6 J 52 10 U 8.3 J 10 U Zinc 7440-66-6 T 1000 02L pg/L 14 J+ 19 30 J+ 71 33 49 13 J+ 14 5.9 J+ 52 10 U 23 10 U Total Dissolved Solids TDS N 500000 02L pg/L 1390000 2010000 1400000 1670000 1140000 1540000 283000 177000 1100000 903000 1430000 1020000 248000 Total Organic Carbon TOC N pg/L 810 J 720 J 900 J 880 J 1200 1000 1500 1200 1200 1 980 J 1000 UJ 770 J 1100 Total Suspended Solids TSS N pg/L 99700 66200 159000 141000 7400 87400 14700 123000 41000 2500 U 19600 134000 66900 Alkalinity, CO3 ALK-CO3 N pg/L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 77400 5000 U 5000 U 5000 U 5000 U 5000 U 11600 Alkalinity, HCO3 ALK-HCO3 N pg/L 8700 11500 9700 15100 23900 23400 109000 93200 92800 94100 23200 27800 9700 Alkalinity, lab ALK-LAB N pg/L 8700 11500 9700 15100 23900 23400 187000 93200 92800 94100 23200 27800 21300 Chloride 16887-00-6 N 250000 02L pg/L 504000 482000 470000 500000 541000 458000 13900 11700 307000 272000 496000 474000 2400 Nitrogen, NO2 plus NO3 NO2-NO3 N pg/L 20 U 20 UJ 20 U 20 UJ 20 UJ 13 J+ 20 UJ 20 U 20 U 310 20 U 11 J 93 Sulfate 14808-79-8 N 250000 02L pg/L 111000 128000 121000 149000 86100 93000 38500 32700 26800 28300 132000 132000 5800 Sulfide 18496-25-8 N pg/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 UJ 100 U 100 U Arsenic 7440-38-2 T 10 02L pg/L - - - - 0.32 J+ - 5.74 - - - - - 0.345 J Chromium 7440-47-3 T 10 02L pg/L 0.661 J+ 17.5 7.51 Iron 7439-89-6 T 300 02L pg/L 133 383 100 U Manganese 7439-96-5 D pg/L 14800 2.53 J+ 2 U Manganese 7439-96-5 T 50 02L pg/L 14700 18 J+ 2 U As(III) 7784-46-5 T pg/L 0.422 J+ 0.65 J+ 0.155 J+ As(V) 10103-60-3 T pg/L 0.5 U 5.09 0.19 J Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L 0.02 U 14 7.5 Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L - - - Fe0l) 1345-25-1 1 T I pg/L 1 11.4 J- 30 UJ 30 UJ Fe(III) 1309-37-1 1 T I pg/L - Page 1 of 6 Table 2-8 Groundwater Analytical Results Within Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: ABAD AB-1D ABAS AB-1S AB-2D AB-2D AB-2S AB-2S AB-3D AB-3D AB-3S AB-3S AB-4BR Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1- 7/10/2015 10/1/2015 7/10/2015 10/1/2015 7/15/2015 10/1/2015 7/15/2015 9/30/2015 7/10/2015 9/28/2015 7/11/2015 9/28/2015 7/16/2015 N N N N N N N N N N N N N ABAD BL-AB-1D-NS-3Q15 AB-1S BL-AB-1S-NS-3Q15 AB-2D BL-AB-2D-NS-3Q15 AB-2S BL-AB-2S-NS-3Q15 AB-3D BL-AB-3D-NS-3Q15 AB-3S BL-AB-3S-NS-3Q15 AB-4BR Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Mn(II) 1344-43-0 T pg/L Mn(IV) 1313-13-9 T pg/L Se(IV) 10102-18-8 T pq/L 2 U 2 U 2 U Se(VI) 13410-01-0 T I pg/L 2 U 0.701 J 0.545 J Uranium, Natural 7440-61-1 T pg/L - - Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pg/L Uranium-234 13966-29-5 T pg/L Uranium-236 13982-70-2 T pg/L - - - - Dissolved Oxygen DO N mg/L 0.22 0.2 1.78 0.2 1.3 0.4 1.38 0.5 2.57 0.84 0.56 1.1 1.73 Temperature TEMP N Deg C 27.5 18.4 25.5 18.9 27.5 18.1 20.2 23.7 27.9 22.2 22.7 22.5 30.2 pH PH N 6.5 8.5 02L SU 5.64 5.9 5.9 5.8 5.74 1 5.9 11.06 10.92 7.11 7.06 6.01 5.87 11.18 Turbidity, field TURB N - NTU 11.02 7 14.54 85.1 9.47 9.4 8.21 41.34 1 1.63 1 4.24 1 3.89 1 7.61 8.62 Specific Conductivity (field) SC N PS/cm 1777 1819 1779 1938 1734 1774 773 462.9 1204 1159 1451 1870 870 Oxidation Reduction Potential ORP N mV 206.3 18.6 200.2 175.8 155.8 68.6 -4.6 -86.7 203.4 -71.8 203.9 172.4 9.3 GW Depth (TOC) GW DEPTH-TOC N ft - 38.52 - 40.51 - 45.99 - 35.84 51.96 38.44 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 2 of 6 Table 2-8 Groundwater Analytical Results Within Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AB-4BR AB-4D AB-4D AB-5D A113-511) AB-6D AB-6D AB-7D AB-7D AB-7D AB-8D AB-8D AB-81) AB-9BR Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 10/1/2015 7/16/2015 10/1/2015 7/14/2015 10/1/2015 7/8/2015 10/1/2015 6/16/2015 7/9/2015 9/28/2015 6/17/2015 7/13/2015 10/1/2015 7/16/2015 N N N N N N N N N N N N N N BL-AB-4BR-NS-3Q15 AB-4D BL-AB-4D-NS-3Q15 AB-5D BL-AB-5D-NS-3Q15 AB-6D BL-AB-6D-NS-3Q15 AB-71D AB-7D BL-AB-7D-NS-3Q15 AB-8D AB-8D BL-AB-8D-NS-3Q15 AB-9BR Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pg/L 670 100 U 100 U 100 U 50 J 100 U 100 U 495 J 100 U 100 U 63 J 66 J Aluminum 7429-90-5 T pg/L 660 79 J 100 U 1300 400 66 J 100 U 533 530 420 780 250 Antimony 7440-36-0 D pg/L 1.9 2.3 0.18 J 0.56 0.4 J 0.5 U 0.5 U 0.5 UJ 0.43 J 0.19 J 0.5 U 0.7 J+ Antimony 7440-36-0 T 1 IMAC I pg/L 2.6 1 0.18 J- 0.66 0.42 J 0.16 J 0.5 U 0.5 U 0.53 0.18 J 0.19 J 0.53 J+ Arsenic 7440-38-2 D pg/L 0.44 J 2.5 2.5 6.6 4.8 0.13 J 0.5 U 0.5 UJ 0.63 2.1 1.9 9.3 Arsenic 7440-38-2 T 10 02L pg/L 0.8 3.1 2.5 J- 8.5 5.2 0.12 J 0.2 J 0.56 0.65 2.1 2.6 9.1 Barium 7440-39-3 D pg/L 12 25 20 18 1 22 20 20 12 J+ 17 13 8.8 4.4 J Barium 7440-39-3 T 700 02L pg/L 18 22 21 35 25 22 20 12 23 14 14 5.4 Beryllium 7440-41-7 D pg/L 0.2 U 0.27 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 Beryllium 7440-41-7 T 4 IMAC pg/L 0.2 U 0.12 J 0.2 U 0.21 0,071 J 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.19 J 0.2 U Boron 7440-42-8 D pg/L 41 J 120 110 49 J 50 U 50 U 50 U 50 U 50 U 63 J+ 46 J 50 U Boron 7440-42-8 T 700 02L pg/L 39 J 130 110 J- 52 79 J+ 50 U 50 U 54 50 U 42 J 58 50 U Cadmium 7440-43-9 D pg/L 0.08 U 0.053 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 UJ 0.08 U 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T 2 02L pg/L 0.08 U 0,035 J 0.08 U 0.054 J 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.026 J 0.08 U Calcium 7440-70-2 T pg/L 48000 19100 21700 J- 15600 11600 11000 9890 38100 10500 8980 8710 39000 Chromium 7440-47-3 D pg/L 1.3 0.69 J+ 0.41 J 0.6 0.36 J 0.52 J+ 0.55 0.39 J+ 0.34 J 0.4 J+ 0.5 U 0.18 J+ Chromium 7440-47-3 T 10 02L pg/L 3.9 1.6 J+ 0.44 J 3.5 1 J+ 0.58 J+ 0.5 J 0.47 J 2.3 J+ 0.96 0.78 J+ 0.85 J+ Cobalt 7440-48-4 D pg/L 1 0.5 U 0.32 J 0.22 J 0.14 J 0.34 J 0.32 J 0.5 U 0.5 UJ 0.15 J 1.2 1.1 0.5 U Cobalt 7440-48-4 T 1 IMAC pg/L 0.5 U 0.22 J 0.2 J- 1.1 0.58 0.38 J 0.5 U 0.5 U 0.41 J 1.2 1.5 0.26 J Copper 7440-50-8 D pg/L 3.2 28.1 J+ 1 U 0.43 J 0.24 J 1 U 1 U 8.4 J+ 0.68 J 1 U 0.65 J 0.28 J Copper 7440-50-8 T 1000 02L pg/L 1.1 38.6 0.75 J- 2.9 0.75 J 0.45 J 0.39 J 0.28 J 1.9 J+ 1 U 0.83 J 0.63 J Iron 7439-89-6 D pg/L 50 U 170 88 44 J 120 50 U 50 U 27.3 J 200 66 190 50 U Iron 7439-89-6 T 300 02L pg/L 140 170 93 J- 1100 390 84 31 J 130 880 160 660 290 Lead 7439-92-1 D pg/L 0.42 0.06 J+ 0.1 U 0.1 U 0.052 J 0.1 U 0.1 U 0.1 UJ 0.14 J 0.1 U 0.071 J 0.1 U Lead 7439-92-1 T 15 02L pg/L 0.083 J 0.79 0.1 U 2.3 0.54 0.1 U 0.1 U 0.053 J 0.37 J+ 0.14 0.82 0.11 Magnesium 7439-95-4 T pg/L 3920 4330 4770 J- 3080 2960 3260 3060 1330 2230 2310 2580 7500 Manganese 7439-96-5 D pg/L 5 U 44 140 93 120 100 27 11 J+ 16 120 100 21 Manganese 7439-96-5 T 50 02L pg/L 3.4 J 29 150 J- 120 120 110 32 11 30 130 110 91 Mercury 7439-97-6 D pg/L 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 0.16 J Mercury 7439-97-6 T 1 02L pg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.00115 0.2 U 0.081 J+ 0.2 U 0.2 U Methane 74-82-8 N pg/L 3.6 J+ 2.6 J+ 4.6 J+ 10 U 30.2 3.2 J+ 2.5 J+ 10 U 1.3 J+ 10 U 3.3 J+ 209 Molybdenum 7439-98-7 D pg/L 7.9 5.1 5.2 7.9 6.2 1.8 1.5 3.2 J+ 3.5 0.86 0.84 7.6 Molybdenum 7439-98-7 T pg/L 8.2 5.3 4.8 J- 7.5 5.5 1.8 1.4 3.2 3.7 0.77 0.74 6.6 Nickel 7440-02-0 D pg/L 0.58 1.2 J+ 0.35 J 0.7 1.1 1.2 J+ 0.76 0.43 J+ 0.41 J 2.8 3.9 0.22 J Nickel 7440-02-0 T 100 02L pg/L 1.4 0.93 J+ 0.32 J- 2.2 1.4 J+ 1.5 J+ 0.66 0.21 J 1.2 3 J+ 5.6 0.5 UJ Potassium 7440-09-7 T pg/L 4370 J 2700 J 5000 U 2690 J 5000 U 5000 U 5000 U 3340 J 3470 J 5000 U 5000 U 3480 J Selenium 7782-49-2 D pg/L 0.27 J 1.1 0.33 J 0.53 0.41 J 0.68 J+ 0.5 U 0.4 J+ 0.5 U 0.29 J 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pg/L 0.28 J 0.99 0.3 J- 0.82 0.44 J 0.23 J 0.5 U 0.42 J 0.5 U 0.49 J 0.5 U 0.5 U Sodium 7440-23-5 T pg/L 12300 17600 21400 J- 13400 11900 8650 8700 9740 9330 8450 7890 7540 Strontium 7440-24-6 D pg/L 130 110 120 80 69 64 57 95 46 70 64 180 Strontium 7440-24-6 T pg/L 160 110 130 J- 94 67 68 57 87 48 72 74 150 Thallium 7440-28-0 D pg/L 0.1 U 0.028 J 0.016 J 0.1 U 0.03 J 0.1 U 0.1 U 0.1 UJ 0.1 U 0.035 J 0.02 J 0.1 U Thallium 7440-28-0 T 0.2 IMAC pg/L 0.1 U 0.02 J 0.026 J- 0.052 J 0.063 J 0.1 U 0.1 U 0.1 U 0.1 U 0.033 J 0.037 J 0.1 U Vanadium 7440-62-2 D pg/L 3.6 2.9 3.4 4.7 3.5 2.8 2.8 6.6 J+ 0.82 J 1.1 1 U 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 4.6 5 3.1 9.9 4.7 2.7 2.7 7.9 1.9 1.1 1.3 1 U Zinc 7440-66-6 D pg/L 10 U 35 8.9 J 10 U 8.1 J 2.8 J 7 J 10 UJ 10 U 10 U 2.8 J 10 U Zinc 7440-66-6 T 1000 02L pg/L 10 U 12 4 J- 8.3 J+ 13 2.8 J 10 U 10 U 20 2.8 J+ 12 10 U Total Dissolved Solids TDS N 500000 02L pg/L 89000 148000 178000 154000 106000 106000 96000 154000 96000 108000 117000 173000 Total Organic Carbon TOC N pg/L 1000 U 980 J 1000 U 580 J 1000 U 1000 U 1000 U 4900 1000 U 1000 U 1000 U 1000 U Total Suspended Solids TSS N pg/L 73500 6100 2500 U 103000 33100 5100 2500 U 2800 8700 22300 556000 7000 Alkalinity, CO3 ALK-CO3 N pg/L 79200 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 36000 5000 U 10000 U 5000 U 1800 J Alkalinity, HCO3 ALK-HCO3 N pg/L 39700 93600 115000 J- 70400 56300 44700 47000 60000 35800 39000 34000 121000 Alkalinity, lab ALK-LAB N pg/L 119000 93600 115000 J- 70400 56300 44700 47000 99000 35800 39000 34000 123000 Chloride 16887-00-6 N 250000 02L pg/L 2700 4300 4000 J- 2000 1600 2400 J+ 2100 4100 4300 8500 9300 4400 Nitrogen, NO2 plus NO3 NO2-NO3 N pg/L 100 J+ 110 120 J- 20 U 34 20 U 58 20 U 20 U 20 U 20 UJ 20 U Sulfate 14808-79-8 N 250000 02L pg/L 7600 7900 5400 8100 6700 9700 6200 9600 10800 780 J 1100 11800 Sulfide 18496-25-8 N pg/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 230 500 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pg/L - 2.15 J+ - 6.45 J+ - 0.5 UJ - - 0.855 J+ - - 2.18 J+ - 7.39 Chromium 7440-47-3 T 10 02L pg/L 1.14 J+ 4.76 J+ 0.864 J+ 1.75 2.41 J+ 0.7 J+ Iron 7439-89-6 T 300 02L pg/L 139 282 75A J+ 423 J+ 721 128 Manganese 7439-96-5 D pg/L 43.1 105 104 J+ 14.2 151 16.6 Manganese 7439-96-5 T 50 02L pg/L 38.9 132 110 J+ 31.1 163 60.8 As(III) 7784-46-5 T pg/L 0.717 J+ 2.15 J+ 0.5 UJ 0.686 J+ 1.85 J+ 6.6 J+ As(V) 10103-60-3 T pg/L 1.44 4.29 J+ 0.5 UJ 0.372 - 0.326 J+ 0.791 Chromium (VI) 18540-29-9 D 1 0.07 DHHS pg/L 0.02 U 0.049 - - 0.02 U 0.02 U Chromium (VI) 18540-29-9 T 1 0.07 DHHS pg/L - - 0,059 Fe0l) 1345-25-1 T pg/L 30 UJ 30 UJ - 30 UJ 30 U 30 UJ Fe(III) 1309-37-1 1 T I pg/L 20 U Page 3 of 6 Table 2-8 Groundwater Analytical Results Within Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: AB-4BR AB-4D AB-4D AB-5D A113-511) AB-6D AB-6D AB-7D AB-7D AB-7D AB-8D AB-8D AB-81) AB-9BR Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 10/1/2015 7/16/2015 10/1/2015 7/14/2015 10/1/2015 7/8/2015 10/1/2015 6/16/2015 7/9/2015 9/28/2015 6/17/2015 7/13/2015 10/1/2015 7/16/2015 N N N N N N N N N N N N N N BL-AB-4BR-NS-3Q15 AB-4D BL-AB-4D-NS-3Q15 AB-5D BL-AB-5D-NS-3Q15 AB-6D BL-AB-6D-NS-3Q15 AB-71D AB-7D BL-AB-7D-NS-3Q15 AB-8D AB-8D BL-AB-8D-NS-3Q15 AB-9BR Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Mn(II) 1344-43-0 T pg/L 7.65 J+ Mn(IV) 1313-13-9 T pg/L 3.08 Se(IV) 10102-18-8 T pq/L 2 U 2 U 2 U 0.5 U 2 U 2 U Se(VI) 13410-01-0 1 pg/L 2 U 2 U 2 U 0.238 2 U 2 U Uranium, Natural 7440-61-1 T pg/L - Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pg/L Uranium-234 13966-29-5 T pg/L Uranium-236 13982-70-2 T pg/L Dissolved Oxygen DO N mg/L 1.3 1.07 0.8 0.99 1.34 0.61 1.7 0.42 1.22 0.6 0.11 0.56 0.6 0.37 Temperature TEMP N Deg C 19.4 23.4 20.3 29.5 19.1 30 22.6 23A 28 22.2 19.9 30.2 17.3 17.4 pH PH N 6.5 8.5 02L SU 11.2 6.19 6 7.41 6.68 6.56 6.5 1 10.5 9.06 7 6.2 6.05 1 6 1 9.12 Turbidity, field TURB N - NTU 9.5 8.18 0.7 130.5 42.43 26 2.9 2.5 8.66 3.2 5.7 13.85 78 18.5 Specific Conductivity (field) SC N PS/cm 558 184.7 237 171.8 122.1 131.4 111.7 237 152.9 119 988 104.2 105 247.2 Oxidation Reduction Potential 'RP N mV -71.6 96.6 8.2 7.6 2.8 123.4 20.5 22.3 52A -92.8 105.3 65 119.5 -128.7 GW Depth (TOC) GW DEPTH-TOC N ft - - 7.78 6.7 - 6.05 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 4 of 6 Table 2-8 Groundwater Analytical Results Within Ash Basin - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: A13-91311 AB-9D AB-91) AB-9S AB-9S Round 2 Round 1 Round 2 Round 1 Round 2 10/1/2015 7/16/2015 10/1/2015 7/15/2015 10/1/2015 N N N N N BL-AB-9BR-NS-3Q15 AB-9D BL-AB-9D-NS-3Q15 A13-9S BL-AB-9S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pg/L 100 U 100 U 100 U 51 J 100 U Aluminum 7429-90-5 T pg/L 64 J 430 360 110 89 J Antimony 7440-36-0 D pg/L 0.19 J 0.29 J+ 0.18 J 0.8 J+ 0.5 U Antimony 7440-36-0 T 1 IMAC I pg/L 0.19 J 0.27 J+ 0.3 J 0.42 J 0.16 J Arsenic 7440-38-2 D pg/L 13.8 1.7 2.3 0.17 J+ 0.5 U Arsenic 7440-38-2 T 10 02L pg/L 12.9 1.8 2 0.5 U 0.5 U Barium 7440-39-3 D pg/L 8.5 11 6.5 58 1 56 Barium 7440-39-3 T 700 02L pg/L 9.7 11 9.1 63 55 Beryllium 7440-41-7 D pg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.12 J Beryllium 7440-41-7 T 4 IMAC pg/L 0.2 U 0.2 U 0.2 U 0.069 J 0.098 J Boron 7440-42-8 D pg/L 50 U 64 72 30 J 50 U Boron 7440-42-8 T 700 02L pg/L 50 UJ 59 1 66 J+ 51 50 UJ Cadmium 7440-43-9 D pg/L 0.08 U 0.08 U 0.08 U 0.041 J 0.044 J Cadmium 7440-43-9 T 2 02L pg/L 0.08 U 0.08 U 0.08 U 0.051 J 0.033 J Calcium 7440-70-2 T pg/L 39800 33200 34000 664 491 Chromium 7440-47-3 D pg/L 0.26 J 0.46 J+ 0.25 J 0.32 J+ 0.62 Chromium 7440-47-3 T 10 02L pg/L 0.57 J+ 1.2 J+ 1 J+ 0.24 J+ 1.2 J+ Cobalt 7440-48-4 D pg/L 0.67 0.64 0.25 J 17.9 15.2 Cobalt 7440-48-4 T 1 IMAC pg/L 0.7 0.86 1 0.57 21.4 13.9 Copper 7440-50-8 D pg/L 1 U 1 U 0.25 J 1.5 1 2.1 Copper 7440-50-8 T 1000 02L pg/L 1 U 0.61 J 0.51 J 0.32 J 0.38 J Iron 7439-89-6 D pg/L 26 J 270 390 50 U 62 Iron 7439-89-6 T 300 02L pg/L 410 700 830 120 J+ 120 Lead 7439-92-1 D pg/L 0.046 J 0.1 U 0.13 0.1 U 0.31 Lead 7439-92-1 T 15 02L pg/L 0.1 U 0.28 0.23 0.065 J+ 0.091 J Magnesium 7439-95-4 T pg/L 8250 7240 8130 900 921 Manganese 7439-96-5 D pg/L 660 160 180 590 490 Manganese 7439-96-5 T 50 02L pg/L 690 150 160 720 450 Mercury 7439-97-6 D pg/L 0.2 U 0.16 J 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L pg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N pg/L 10 UJ 48.1 30 2 J+ 4.3 J+ Molybdenum 7439-98-7 D pg/L 3.1 3.3 6.9 0.5 U 0.5 U Molybdenum 7439-98-7 T pg/L 3.1 2.8 4.8 0.5 U 0.5 U Nickel 7440-02-0 D pg/L 0.48 J 0.81 0.64 1.6 1.6 Nickel 7440-02-0 T 100 02L pg/L 0.73 1 1.1 2.7 1.7 Potassium 7440-09-7 T pg/L 2530 J 2770 J 2930 J 5000 U 5000 U Selenium 7782-49-2 D pg/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pg/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T pg/L 7320 10600 13600 4630 J 5410 Strontium 7440-24-6 D pg/L 110 100 110 6.8 7.1 Strontium 7440-24-6 T pg/L 110 95 110 7.3 6.4 Thallium 7440-28-0 D pg/L 0.1 U 0.1 U 0.1 U 0.11 J+ 0.13 Thallium 7440-28-0 T 0.2 IMAC pg/L 0.1 U 0.1 U 0.1 U 0.13 0.13 Vanadium 7440-62-2 D pg/L 1 U 0.44 J 1 U 1 U 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 1 U 1.3 1 0.33 J 1 U Zinc 7440-66-6 D pg/L 10 U 10 U 10 U 5.8 J 15 Zinc 7440-66-6 T 1000 02L pg/L 10 U 10 U 10 U 7 J+ 4.9 J Total Dissolved Solids TDS N 500000 02L pg/L 180000 182000 177000 28000 25000 U Total Organic Carbon TOC N pg/L 1000 U 1100 900 J 20000 580 J Total Suspended Solids TSS N pg/L 2500 U 19500 5100 3400 2500 U Alkalinity, CO3 ALK-CO3 N pg/L 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pg/L 134000 119000 118000 9200 7900 Alkalinity, lab ALK-LAB N pg/L 134000 119000 118000 9200 7900 Chloride 16887-00-6 N 250000 02L pg/L 4800 5400 5800 5300 5800 Nitrogen, NO2 plus NO3 NO2-NO3 N pg/L 20 U 13 J+ 20 U 260 J- 370 Sulfate 14808-79-8 N 250000 02L pg/L 13800 10000 10700 440 J 890 J Sulfide 18496-25-8 N pg/L 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pg/L - 1.81 - 0.5 U - Chromium 7440-47-3 T 10 02L pg/L 0.866 J+ 0.136 J+ Iron 7439-89-6 T 300 02L pg/L 245 100 U Manganese 7439-96-5 D pg/L 170 469 Manganese 7439-96-5 T 50 02L pg/L 184 611 As(III) 7784-46-5 T pg/L 0.909 J+ 0.375 J+ As(V) 10103-60-3 T pg/L 0.899 0.5 U Chromium (VI) 18540-29-9 D 1 0.07 DHHS pg/L 0.02 U 1 0.02 U Chromium (VI) 18540-29-9 T 0.07 DHHS pg/L - - - Fe(II) 1345-25-1 T pg/L 30 UJ 111 J- Fe(III) 1309-37-1 T pg/L - Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 5 of 6 Table 2-8 Groundwater Analytical Results Within Ash Basin - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: A13-91311 AB-9D AB-91) AB-9S AB-9S Round 2 Round 1 Round 2 Round 1 Round 2 10/1/2015 7/16/2015 10/1/2015 7/15/2015 10/1/2015 N N N N N BL-AB-9BR-NS-3Q15 AB-9D BL-AB-9D-NS-3Q15 AB-9S BL-AB-9S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Mn(II) 1344-43-0 T pg/L Mn(IV) 1313-13-9 T pg/L Se(IV) 10102-18-8 T pq/L 2 U 2 U Se(VI) 13410-01-0 T I pg/L 2 U 2 U Uranium, Natural 7440-61-1 T pg/L Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pg/L Uranium-234 13966-29-5 T pg/L Uranium-236 13982-70-2 T pg/L Dissolved Oxygen DO N mg/L 0.54 0.31 0.39 1.66 1.22 Temperature TEMP N Deg C 15.3 17.7 16.1 18 17 pH PH N 6.5 8.5 02L SU 7.7 6.54 6.7 4.47 5.2 Turbidity, field TURB N - NTU 3.1 23.2 5.5 3.72 1.3 Specific Conductivity (field) SC N PS/cm 341.8 291.1 351.8 48 54.3 Oxidation Reduction Potential ORP N mV -128.6 -38.1 -17.4 188.8 266.5 GW Depth (TOC) GW DEPTH-TOC N ft - - 26.5 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 6 of 6 Table 2-9 Groundwater Analytical Results Downgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-10D GWA-10D GWA-10S GWA-10S GWA-11D GWA-11D GWA-11S GWA-11S GWA-1D GWA-1D GWAAS GWA-1S Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 7/18/2015 10/2/2015 7/18/2015 10/2/2015 7/18/2015 10/2/2015 7/18/2015 10/2/2015 7/12/2015 9/30/2015 7/12/2015 9/30/2015 N N N N N N N N N N N N GWA-10D BL-GWA-10D-NS-3Q15 GWA-10S BL-GWA-10S-NS-3Q15 GWA-11D BL-GWA-11D-NS-3Q15 GWA-11S BL-GWA-I1S-NS-3Q15 GWA-1D BL-GWA-ID-NS-3Q15 GWAAS BL-GWA-1S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pg/L 1100 110 690 630 100 U 100 U 100 U 190 150 100 U 340 190 Aluminum 7429-90-5 T pg/L 1300 300 700 1200 170 2700 170 7400 580 870 760 320 Antimony 7440-36-0 D pg/L 0.98 J+ 3.8 0.5 U 0.5 U 0.82 3 0.5 U 0.5 U 0.62 0.68 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC pg/L 1.6 4.9 0.5 U 0.5 U 0.8 2.8 0.5 U 0.5 U 0.63 0.82 0.5 U 0.5 U Arsenic 7440-38-2 D pg/L 1.5 0.29 J 3.5 3.2 2 3.1 1.1 0.9 2.3 1.2 0.25 J 0.5 U Arsenic 7440-38-2 T 10 02L pg/L 1.7 0.56 5 6.2 2.1 4.2 1.3 7.5 2.4 2.5 0.49 J 0.48 J Barium 7440-39-3 D pg/L 24 11 260 280 20 22 500 530 6.4 6.3 340 280 Barium 7440-39-3 T 700 02L pg/L 23 10 260 280 22 40 490 570 11 19 340 320 Beryllium 7440-41-7 D pg/L 0.2 U 0.2 U 1.3 1.4 0.2 U 0.2 U 6.9 9.7 0.2 U 0.2 U 6.3 5.5 Beryllium 7440-41-7 T 4 IMAC pg/L 0.2 U 0.2 U 1.4 1.4 0.068 J 0.11 J 6.6 10.9 0.2 U 0.2 U 6 6.5 Boron 7440-42-8 D pg/L 50 U 50 U 49 J 49 J 29 J 29 J 170 130 50 U 50 U 440 420 Boron 7440-42-8 T 700 02L pg/L 50 U 50 U 46 J 41 J 50 U 26 J 160 120 50 U 50 U 430 390 Cadmium 7440-43-9 D pg/L 0.08 U 0.08 U 0.14 0.12 0.067 J 0.14 0.62 0.76 0.2 0.043 J 0.46 0.47 Cadmium 7440-43-9 T 2 02L pg/L 0.08 U 0.08 U 0.14 0.17 0.062 J 0.13 0.61 0.77 0.2 0.037 J 0.46 0.47 Calcium 7440-70-2 T pg/L 68800 21300 1520 1390 58000 56200 38700 30900 9780 10900 8680 10900 Chromium 7440-47-3 D pg/L 1.3 J+ 0.75 0.54 J+ 0.35 J 0.37 J+ 4.5 0.75 J+ 36.2 1.3 0.5 U 12.5 7.7 Chromium 7440-47-3 T 10 02L pg/L 1 J+ 0.96 J+ 1.4 J+ 1.2 J+ 1.5 J+ 24.1 0.52 J+ 66.2 4 37.1 29.7 32.1 Cobalt 7440-48-4 D pg/L 0.5 U 0.5 U 30.6 30.8 1.5 2.3 7.4 10.2 1.4 2.6 8.4 6.3 Cobalt 7440-48-4 T 1 IMAC pg/L 0.5 UJ 0.29 J 30.4 32.2 1.6 3 7.4 13.2 1.6 3.4 10 7.4 Copper 7440-50-8 D pg/L 2.1 J+ 0.49 J 8.3 J+ 1 2.3 6.8 J+ 1 4.8 8.7 J+ 4.2 1.6 1.9 4.7 1.1 Copper 7440-50-8 T 1000 02L pg/L 0.94 J+ 0.54 J 1.4 J+ 2.1 1 UJ 2.9 0.35 J+ 4.5 1.1 3.5 0.96 J 1.3 Iron 7439-89-6 D pg/L 50 U 50 U 50 U 50 U 570 350 50 U 200 140 50 U 82 47 J Iron 7439-89-6 T 300 02L pg/L 50 UJ 26J 35J 1100 810 4200 120 11700 620 1400 780 230 Lead 7439-92-1 D pg/L 0.074 J+ 0.089 J 1.8 J+ 1.3 0.48 J+ 0.67 0.84 J+ 0.54 0.16 0.16 0.37 0.28 Lead 7439-92-1 T 15 02L pg/L 0.062 J 0,057 J 1.2 2.5 0.11 0.6 0.053 J 3.8 0.46 0.76 0.37 0.38 Magnesium 7439-95-4 T pg/L 575 929 5650 5930 16700 20300 31100 32400 4000 4710 29200 29700 Manganese 7439-96-5 D pg/L 5 U 5 U 810 790 180 240 330 260 21 26 350 280 Manganese 7439-96-5 T 50 02L pg/L 5 U 3.3 J 800 790 190 270 320 370 25 44 390 270 Mercury 7439-97-6 D pg/L 0.2 U 0.2 U 0.25 0.19 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 Mercury 7439-97-6 T 1 02L pg/L 0.2 U 0.2 U 0.47 0.37 0.2 U 0.2 U 0.2 U 0.25 0.2 U 0.2 U 0.075 J+ 0.2 U Methane 74-82-8 N pg/L 2.1 J+ 3.9 J+ 1.2 J+ 3 J+ 10 U 4.8 J+ 1 J+ 1.1 J+ 1.5 J+ 1.3 J+ 2.5 J+ 2.5 J+ Molybdenum 7439-98-7 D pg/L 6.4 2.2 0.5 U 0.5 U 2.3 3 0.5 U 0.36 J 5.2 3.8 0.26 J 0.13 J Molybdenum 7439-98-7 T pg/L 5.5 2.4 0.12 J 0.15 J 2.3 2.9 0.5 U 0.88 5.2 4.6 0.55 0.59 Nickel 7440-02-0 D pg/L 0.6 J+ 0.34 J 7.6 7.1 12.2 22.3 13.8 48.9 8.2 16.6 35.8 28.9 Nickel 7440-02-0 T 100 02L pg/L 0.71 0.88 J+ 7.8 7.8 13 24.5 13.5 57.4 8.6 28.4 45.2 43.1 Potassium 7440-09-7 T pg/L 19300 13100 3540 J 3900 J 9180 10300 6690 7230 5000 U 3280 J 5180 5000 J Selenium 7782-49-2 D pg/L 0.46 J 0.5 U 2.3 1.1 0.5 U 0.5 U 0.5 U 0.35 J 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pg/L 0.38 J 0.22 J 10.6 1.7 0.5 U 0.5 U 0.52 0.53 0.5 U 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T pg/L 15300 12800 11500 11800 18000 21000 22600 21700 20100 18000 15000 16100 Strontium 7440-24-6 D pg/L 570 360 15 15 270 300 480 480 66 75 180 240 Strontium 7440-24-6 T pg/L 560 340 15 15 280 310 460 450 70 80 180 200 Thallium 7440-28-0 D pg/L 0.022 J 0,035 J 0.18 0.24 0,029 J 0.033 J 0.27 0.38 0,022 J 0.051 J 0.34 0.37 Thallium 7440-28-0 T 0.2 IMAC pg/L 0.017 J+ 0.017 J 0.2 J 0.25 0.041 J+ 0.088 J 0.3 0.53 0.07 J 0.051 J 0.34 0.41 Vanadium 7440-62-2 D pg/L 7.4 2.6 1 U 1 U 0.76 J+ 1 U 1 U 1 U 1.1 0.45 J 1 U 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 7.9 2.9 1 U 1.1 0.75 J 4.2 1 U 6.3 1.5 1.7 0.29 J 0.57 J Zinc 7440-66-6 D pg/L 4.8 J+ 10 U 22 J+ 35 16 J+ 42 43 100 6.6 J 15 19 15 Zinc 7440-66-6 T 1000 02L pg/L 10 U 2.9 J 20 33 14 55 J+ 38 140 6.9 J 9.7 J 21 17 Total Dissolved Solids TDS N 500000 02L pg/L 265000 120000 138000 81000 526000 1 541000 578000 1 484000 158000 135000 380000 251000 Total Organic Carbon TOC N pg/L 980 J 1000 U 1000 U 1400 11100 1000 U 1000 U 1000 U 1000 U 1000 U 1000 U 1000 U Total Suspended Solids TSS N pg/L 18600 86300 29400 113000 2600 312000 6300 565000 46200 8300 18400 10800 Alkalinity, CO3 ALK-CO3 N pg/L 155000 53800 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pg/L 5000 U 5000 U 5000 U 5000 U 55900 49800 19900 2800 J 37200 33600 1400 J 1200 J Alkalinity, lab ALK-LAB N pg/L 200000 67400 5000 U 5000 U 55900 49800 19900 2800 J 37200 33600 1400 J 1200 J Chloride 16887-00-6 N 250000 02L pg/L 12800 19000 46500 48300 137000 145000 175000 188000 27300 28200 127000 133000 Nitrogen, NO2 plus NO3 NO2-NO3 N pg/L 200 280 270 270 170 94 270 240 420 650 640 660 Sulfate 14808-79-8 N 250000 02L pg/L 2700 1800 1000 U 1000 U 5000 7600 660 J 580 J 4300 8800 1000 U 540 J Sulfide 18496-25-8 N pg/L 100 U 100 U 100 U 100 UJ 100 U 100 UJ 100 U 100 UJ 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pg/L - - - - - - - - - - - - Chromium 7440-47-3 T 10 02L pg/L Iron 7439-89-6 T 300 02L pg/L Manganese 7439-96-5 D pg/L Manganese 7439-96-5 T 50 02L pg/L As(III) 7784-46-5 T pg/L As(V) 1 10103-60-3 T I I pg/L Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L Fe(II) 1345-25-1 T pg/L Se(IV) 10102-18-8 T pg/L Se(VI) 13410-01-0 T pg/L Page 1 of 6 Table 2-9 Groundwater Analytical Results Downgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-10D GWA-10D GWA-10S GWA-10S GWA-11D GWA-11D GWA-11S GWA-11S GWA-1D GWA-1D GWAAS GWA-1S Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 7/18/2015 10/2/2015 7/18/2015 10/2/2015 7/18/2015 10/2/2015 7/18/2015 10/2/2015 7/12/2015 9/30/2015 7/12/2015 9/30/2015 N N N N N N N N N N N N GWA-10D BL-GWA-10D-NS-3Q15 GWA-10S BL-GWA-10S-NS-3Q15 GWA-11D BL-GWA-11D-NS-3Q15 GWA-11S BL-GWA-I1S-NS-3Q15 GWA-1D BL-GWA-ID-NS-3Q15 GWAAS BL-GWA-1S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Uranium, Natural 7440-61-1 T pg/L Radium-226 13982-63-3 T pCi/L Radium-228 15262-20-1 T pCi/L Uranium-233 13968-55-3 T pg/L Uranium-234 13966-29-5 T pg/L Uranium-236 13982-70-2 T pg/L Dissolved Oxygen DO N mg/L 2.99 0.5 3.08 2.2 2.92 0.68 5.06 4.29 5.64 3.22 3.98 Temperature TEMP N Deg C 19.3 14.7 15.9 14.6 16.51 13.8 15.97 13.7 23 22.5 23.1 pH PH N 6.5 8.5 02L SU 11.98 11.4 4.14 4.4 6.4 6.5 5.59 5.2 6.72 6.6 4.94 Turbidity, field TURB N NTU 7.21 9.2 7.14 8.9 9.5 11.91 3.13 6.28 11.66 9.9 8.32 Specific Conductivity (field) SC N PS/cm 979 332 200.7 193.5 644 630 704 649 168.9 197.4 406.9 Oxidation Reduction Potential ORP N my -45.4 -48.1 272.3 375.2 56.9 15.2 226.1 207.1 221.8 163.7 345.1 GW Depth (TOC) GW DEPTH-TOC N ft 46 - Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 2 of 6 Table 2-9 Groundwater Analytical Results Downgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-2D GWA-21D GWA-2S GWA-2S MW-102D MW-102D MW-102S MW-102S MW-103D MW-103D MW-103S MW-103S MW-200BR Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 1 Round 1 Round 1 Round 2 Round 1 Round 2 Round 1 7/11/2015 9/30/2015 7/11/2015 9/30/2015 6/17/2015 7/14/2015 6/17/2015 7/14/2015 7/12/2015 10/5/2015 7/12/2015 10/5/2015 7/14/2015 N N N N N N N N N N N N N GWA-2D BL-GWA-2D-NS-3Q15 GWA-2S BL-GWA-2S-NS-3Q15 MW-102D MW-102D MW-102S MW-102S MW-103D BL-MW-103D-NS-3Q15 MW-103S BL-MW-103S-NS-3Q15 MW-200BR Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pg/L 100 U 100 U 100 U 100 U 100 U 250 66 J 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T pg/L 130 100 U 1200 180 130 270 110 150 100 U 490 100 U Antimony 7440-36-0 D pg/L 0.16 J 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 Antimony 7440-36-0 T 1 IMAC pg/L 0.5 U 0.5 U 0.25 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Arsenic 7440-38-2 D pg/L 4.9 2.5 0.5 U 0.5 U 0.18 J 1.9 4 5.5 79.1 86.7 1.9 Arsenic 7440-38-2 T 10 02L pg/L 4.6 3 1.4 0.4 J 0.24 J 3.7 7.5 37.6 79.1 83.6 1.7 Barium 7440-39-3 D pg/L 6.5 5 U 16 12 5 U 250 390 420 35 43 5 U Barium 7440-39-3 T 700 02L pg/L 8.6 5 U 30 15 5 U 270 450 480 36 43 5 U Beryllium 7440-41-7 D pg/L 0.2 U 0.2 U 0.3 0.23 0.2 U 0.57 2.9 2.9 0.2 U 0.2 U 0.13 J Beryllium 7440-41-7 T 4 IMAC pg/L 0.085 J 0.2 U 0.5 0.28 0.093 J 0.61 4.4 4.9 0.2 U 0.17 J 0.11 J Boron 7440-42-8 D pg/L 37 J 50 U 50 U 50 U 9200 2500 1000 1200 480 650 67 Boron 7440-42-8 T 700 02L pg/L 37 J 50 U 50 U 50 U 8800 2500 980 1100 490 580 68 Cadmium 7440-43-9 D pg/L 0.08 U 0.08 U 0.08 U 0.08 U 0.033 J 0.33 4.2 3.1 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T 2 02L pg/L 0.036 J 0.08 U 0.08 U 0.08 U 0.04 J 0.31 3.8 2.9 0.08 U 0.08 U 0.08 U Calcium 7440-70-2 T pg/L 5700 3290 401 118 230000 60200 36000 40200 13100 16300 52500 Chromium 7440-47-3 D pg/L 0.43 J 0.19 J 0.46 J 0.5 U 0.39 J+ 0.3 J+ 0.5 U 0.19 J 0.32 J 0.43 J 0.27 J Chromium 7440-47-3 T 10 02L pg/L 1.6 J+ 1 J+ 2.5 0.47 J+ 0.49 J 0.36 J 0.39 J+ 1.3 0.3 J 3.3 0.23 J Cobalt 7440-48-4 D pg/L 1 0.44 J 1.2 0.48 J 0.95 401 J+ 167 103 44.7 55.5 0.5 U Cobalt 7440-48-4 T 1 IMAC pg/L 1.1 0.54 2 0.6 1 413 79.7 81.5 43.9 55.3 0.5 U Copper 7440-50-8 D pg/L 0.49 J+ 1 1.3 0.82 J+ 0.36 J 0.54 J 0.72 J 2 J+ 1.6 1.1 0.34 J 1 U Copper 7440-50-8 T 1000 02L pg/L 0.73 J 0.26 J 0.62 J 1 U 0.6 J 0.92 J 0.56 J 0.91 J 1 U 0.71 J 1 U Iron 7439-89-6 D pg/L 100 50 U 50 U 50 U 430 2200 11600 17400 91700 94300 180 Iron 7439-89-6 T 300 02L pg/L 320 46J 1600 250 910 2200 11600 11300 92200 89600 190 Lead 7439-92-1 D pg/L 0.1 U 0.14 0.1 U 0.1 U 0.1 U 0.5 1.2 0.16 0.1 U 0.085 J 0.1 U Lead 7439-92-1 T 15 02L pg/L 0.15 0.055 J 1.1 0.15 0.58 0.4 0.1 U 0,095 J 0.1 U 0.75 0.1 U Magnesium 7439-95-4 T pg/L 2130 1440 424 282 39700 30700 45400 48300 28300 32300 6690 Manganese 7439-96-5 D pg/L 96 71 51 18 2400 20800 17500 19100 9200 11600 110 Manganese 7439-96-5 T 50 02L pg/L 96 70 84 23 2500 21300 14500 16300 J- 9200 10900 J- 110 Mercury 7439-97-6 D pg/L 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 Mercury 7439-97-6 T 1 02L pg/L 0.11 J+ 0.2 U 0.12 J+ 0.2 U 0.2 U 0.11 J+ 0.2 U 0.2 UJ 0.2 U 0.2 UJ 0.2 U Methane 74-82-8 N pg/L 3 J+ 1.4 J+ 10 UJ 0.92 J+ 18 10 U 39 31 2030 2130 49.7 Molybdenum 7439-98-7 D pg/L 3.6 0.75 0.5 U 0.5 U 0.42 J 0.5 U 0.5 U 0.5 U 0.2 J 0.22 J 0.45 J Molybdenum 7439-98-7 T pg/L 3.5 0.83 0.14 J 0.5 U 0.31 J 0.5 U 0.5 U 0.5 U 0.19 J 0.15 J 0.42 J Nickel 7440-02-0 D pg/L 1.4 1 1.3 0.39 J 3.4 30.2 69.1 42.8 1 A 1.9 0.5 U Nickel 7440-02-0 T 100 02L pg/L 2.2 1.5 3.3 0.56 3.5 J+ 32.4 47.9 46.9 1.3 3.3 0.5 U Potassium 7440-09-7 T pg/L 2630 J 5000 U 5000 U 5000 U 7070 4590 J 6620 7330 2870 J 3450 J 5000 U Selenium 7782-49-2 D pg/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.77 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pg/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 4.7 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Sodium 7440-23-5 T pg/L 6450 4740J 2540 J 3020J 29700 35900 26300 28400 20400 23700 11200 Strontium 7440-24-6 D pg/L 35 26 5.5 2.9 J 830 190 410 430 52 68 170 Strontium 7440-24-6 T pg/L 41 27 5.7 2.9 J 860 200 410 430 56 63 170 Thallium 7440-28-0 D pg/L 0.1 U 0.1 U 0.063 J 0.072 J 0.1 U 0.4 3.9 4.4 0.16 0.2 0.1 U Thallium 7440-28-0 T 0.2 IMAC pg/L 0.1 U 0.1 U 0.1 UJ 0.088 J 0.1 U 0.3 3.6 3.9 0.16 0.23 0.1 U Vanadium 7440-62-2 D pg/L 0.57 J 0.28 J 1 U 1 U 0.39 J 1 U 1 U 1 U 1 U 1 U 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 0.79 J 0.55 J 0.46 J 1 U 1 U 1 U 1 U 1 U 1 U 1 1 U Zinc 7440-66-6 D pg/L 10 U 10 U 5.2 J 10 U 11 46 30 27 4.5 J 5.5 J 10 U Zinc 7440-66-6 T 1000 02L pg/L 3.7 J 10 U 3.8 J 2.5 J 6.8 J+ 48 21 76 10 U 15 3 J+ Total Dissolved Solids TDS N 500000 02L pg/L 73000 1 49000 33000 1 25000 U 1270000 676000 661000 794000 448000 667000 267000 Total Organic Carbon TOC N pg/L 1000 U 8800 10100 1000 U 1100 540 J 1000 U 1000 U 730 J 1000 U 1000 U Total Suspended Solids TSS N pg/L 115000 2500 U 63200 9400 2600 U 2500 U 5000 U 1 12000 89000 122000 2500 U Alkalinity, CO3 ALK-CO3 N pg/L 5000 U 5000 U 5000 U 5000 U 10000 U 10000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pg/L 33300 21800 5700 6600 76000 10000 U 7900 2700 J 10500 17000 124000 Alkalinity, lab ALK-LAB N pg/L 33300 21800 5700 6600 77000 10000 U 7900 2700 J 10500 17000 124000 Chloride 16887-00-6 N 250000 02L pg/L 1600 2100 1300 1800 407000 247000 280000 - 204000 - 35400 Nitrogen, NO2 plus NO3 NO2-NO3 N pg/L 20 U 69 40 67 20 U 42 14 J 191 20 U 20 U 20 U Sulfate 14808-79-8 N 250000 02L pg/L 990 J 950 J 1000 U 750 J 82800 3400 1000 U - 1000 U - - Sulfide 18496-25-8 N pg/L 100 U 100 U 100 U 100 U 500 U 500 U 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pg/L - - - - - 0.5 UJ - 0.5 UJ - - - - 1.6 J+ Chromium 7440-47-3 T 10 02L pg/L 2.84 J+ 3.8 J+ 3.04 J+ Iron 7439-89-6 T 300 02L pg/L 914 J+ 304 J+ 345 J+ Manganese 7439-96-5 D pg/L 2730J+ 20200J+ 115 J+ Manganese 7439-96-5 T 50 02L pg/L 3180 J+ 19000 J+ 131 J+ As(III) 7784-46-5 T pg/L 0.5 UJ 0.5 UJ 1.43 J+ As(V) 10103-60-3 T pg/L 0.5 UJ 0.5 UJ 0.168 J+ Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L 0.02 U 0.02 U 0.02 U Fe(II) 1345-25-1 T pg/L 16.1 J+ 13.8 J+ 20.8 J+ Se(IV) 10102-18-8 T pg/L 2 U 2 U 2 U Se(VI) 13410-01-0 T pg/L 2 U 2 U 2 U Page 3 of 6 Table 2-9 Groundwater Analytical Results Downgradient of Ash Basin - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: GWA-2D GWA-21D GWA-2S GWA-2S MW-102D MW-102D MW-102S MW-102S MW-103D MW-103D MW-103S MW-103S MW-200BR Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 1 Round 1 Round 1 Round 2 Round 1 Round 2 Round 1 7/11/2015 9/30/2015 7/11/2015 9/30/2015 6/17/2015 7/14/2015 6/17/2015 7/14/2015 7/12/2015 10/5/2015 7/12/2015 10/5/2015 7/14/2015 N N N N N N N N N N N N N GWA-2D BL-GWA-2D-NS-3Q15 GWA-2S BL-GWA-2S-NS-3Q15 MW-102D MW-102D MW-102S MW-102S MW-103D BL-MW-103D-NS-3Q15 MW-103S BL-MW-103S-NS-3Q15 MW-200BR Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Uranium, Natural 7440-61-1 T pg/L 0.697 0.215 0.829 Radium-226 13982-63-3 T pCi/L 2.58 4.13 1.43 Radium-228 15262-20-1 T pCi/L 3 U 3 U 3.38 J+ Uranium-233 13968-55-3 T pg/L 0.05 U 0.05 U 0.05 U Uranium-234 13966-29-5 T pg/L 0.05 U 0.05 U 0.05 U Uranium-236 13982-70-2 T pg/L 0.05 U 0.05 U 0.05 U Dissolved Oxygen DO N mg/L 2.07 4.71 5.5 4.41 3.16 0.52 2.2 0.52 2.21 0.5 0.25 0.1 0.13 Temperature TEMP N Deg C 24.1 15.3 22.5 17.6 16.8 19.5 15.9 18.48 18.7 17.8 21.7 21.7 16.9 pH PH N 6.5 8.5 02L SU 6.37 6.1 5.29 4.9 7.1 7.12 5 4.75 5.42 5.5 6.39 6.5 7.37 Turbidity, field TURB N - NTU 7.4 2 11.74 2 2.4 7.06 2.3 2 7.39 9.6 4.73 30.5 1.04 Specific Conductivity (field) SC N PS/cm 74.2 55.7 19.4 496.2 1448 1750 815 697 827 1001 741 905 396 Oxidation Reduction Potential ORP N my 134.1 180.8 321.4 320.9 -48.3 318.9 201.7 283.8 176 86.3 -44.8 -127.5 5.2 GW Depth (TOC) GW DEPTH-TOC N ft - 44.8 - 30.44 - - - - - Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 4 of 6 Table 2-9 Groundwater Analytical Results Downgradient of Ash Basin - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-200BR MW-200D MW-200D MW-200S MW-200S Round 2 Round 1 Round 2 Round 1 Round 2 10/5/2015 7/14/2015 10/5/2015 7/14/2015 10/5/2015 N N N N N BL-MW-200BR-NS-3Q15 MW-200D BL-MW-200D-NS-3Q15 MW-200S BL-MW-200S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D pg/L 100 U 100 U 100 U 460 170 Aluminum 7429-90-5 T pq/L 100 U 71 J 240 3400 1900 Antimony 7440-36-0 D pq/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC pg/L 0.5 U 0.5 U 0.5 U 0.5 U 0.19 J Arsenic 7440-38-2 D pq/L 1.5 0.9 0.79 3.5 4.2 Arsenic 7440-38-2 T 10 02L pg/L 1.7 1.1 1.4 5.7 5.6 Barium 7440-39-3 D pq/L 5 U 4.8 J 8.1 25 44 Barium 7440-39-3 T 700 02L pq/L 5 U 5.2 8.7 35 45 Beryllium 7440-41-7 D pq/L 0.14 J 0.2 U 0.086 J 0.23 0.23 Beryllium 7440-41-7 T 4 IMAC pg/L 0.16 J 0.2 U 0.12 J 0.32 0.35 Boron 7440-42-8 D pq/L 83 550 1200 50 U 57 Boron 7440-42-8 T 700 02L pg/L 72 590 1100 50 U 25 J Cadmium 7440-43-9 D pg/L 0.08 U 0.035 J 0.1 0.12 0.033 J Cadmium 7440-43-9 T 2 02L pg/L 0.08 U 0.053 J 0.12 0.12 0.056 J Calcium 7440-70-2 T pq/L 52900 48100 58900 J+ 5860 9190 J+ Chromium 7440-47-3 D pq/L 0.33 J 0.85 0.45 J 2.4 0.68 Chromium 7440-47-3 T 10 02L pg/L 0.29 J 2.3 0.49 J 4.1 1.6 Cobalt 7440-48-4 D pq/L 0.5 U 0.5 U 0.5 U 2.1 13.9 Cobalt 7440-48-4 T 1 IMAC pg/L 0.5 U 0.5 U 0.22 J 2.4 14.3 Copper 7440-50-8 D pq/L 6.9 1.1 1.9 3.1 0.68 J Copper 7440-50-8 T 1000 02L pq/L 1 U 1 UJ 2.7 4.4 3.7 Iron 7439-89-6 D pq/L 200 50 U 50 U 250 3300 Iron 7439-89-6 T 300 02L pg/L 190 100 280 4300 5200 Lead 7439-92-1 D pq/L 1.3 0.1 U 0.36 1.4 0.29 Lead 7439-92-1 T 15 02L pq/L 0.1 U 0,066 J 0.36 2.3 2 Magnesium 7439-95-4 T pq/L 6760 11800 16200 J+ 1800 3050 J+ Manganese 7439-96-5 D pq/L 130 13 46 330 430 Manganese 7439-96-5 T 50 02L pg/L 110 20 95 300 370 Mercury 7439-97-6 D pq/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Mercury 7439-97-6 T 1 02L pg/L 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Methane 74-82-8 N pq/L 130 0.75 J+ 2 J+ 1.4 J+ 8.1 J+ Molybdenum 7439-98-7 D pq/L 0.45 J 0.87 0.41 J 0.19 J 0.5 U Molybdenum 7439-98-7 T pq/L 0.51 1.1 0.3 J 0.26 J 0.14 J Nickel 7440-02-0 D pq/L 0.27 J 0.49 J 1.3 2.2 2.5 Nickel 7440-02-0 T 100 02L pq/L 0.5 U 0.62 1.5 3.1 3.3 Potassium 7440-09-7 T pq/L 5000 U 3070 J 3930 J+ 5000 U 2900 J+ Selenium 7782-49-2 D pq/L 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Selenium 7782-49-2 T 20 02L pq/L 0.5 U 0.5 U 0.5 U 0.22 J 0.25 J Sodium 7440-23-5 T pq/L 11300 10400 12700 J+ 5440 6490 J+ Strontium 7440-24-6 D pq/L 180 190 260 35 54 Strontium 7440-24-6 T pq/L 150 200 250 40 49 Thallium 7440-28-0 D pq/L 0.1 U 0.043 J 0,039 J 0.06 J 0.033 J Thallium 7440-28-0 T 0.2 IMAC pg/L 0.1 U 0.037 J 0.037 J 0.062 J 0.071 J Vanadium 7440-62-2 D pq/L 1 U 0.32 J 1 U 5 1.6 Vanadium 7440-62-2 T 0.3 IMAC pg/L 1 U 0.32 J 1 U 8.3 2.7 Zinc 7440-66-6 D pq/L 11 10 U 10 U 10 U 4.9 J Zinc 7440-66-6 T 1000 02L pg/L 16 7.8 J+ 3 J 4.5 J+ 8 J Total Dissolved Solids TDS N 500000 02L pg/L 263000 368000 361000 122000 127000 Total Organic Carbon TOC N I pq/L 1000 U 20500 J- 1000 U 4700 10700 Total Suspended Solids TSS N pq/L 2500 U 2500 U 5000 U 2500 U 7600 Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N pq/L 121000 64900 46800 13300 13500 Alkalinity, lab ALK-LAB N pq/L 121000 64900 46800 13300 13500 Chloride 16887-00-6 N 250000 02L pg/L 39400 83500 121000 11200 16900 Nitrogen, NO2 plus NO3 NO2-NO3 N pq/L 20 U 25 23 22 20 U Sulfate 14808-79-8 N 250000 02L pq/L 6600 4800 6600 - 14200 Sulfide 18496-25-8 N pq/L 100 U 100 U 100 U 100 U 100 U Arsenic 7440-38-2 T 10 02L pq/L - 0.901 J+ - 0.6 J+ - Chromium 7440-47-3 T 10 02L pg/L 3.94 J+ 8.45 J+ Iron 7439-89-6 T 300 02L pg/L 161 J+ 2850 J+ Manganese 7439-96-5 D pq/L 13.2 J+ 329 J+ Manganese 7439-96-5 T 50 02L pg/L 17.6 J+ 475 J+ As(III) 7784-46-5 T pq/L 0.5 UJ 0.5 UJ As(V) 10103-60-3 T pg/L 0.901 J+ 0.6 J+ Chromium (VI) 18540-29-9 D 0.07 DHHS pg/L 0.084 0.02 U Fe(II) 1345-25-1 T pq/L 30 UJ 197 J+ Se(IV) 10102-18-8 T pq/L 2 U 2 U Se(VI) 13410-01-0 T pq/L 2 U 2 U Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 5 of 6 Table 2-9 Groundwater Analytical Results Downgradient of Ash Basin - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: MW-200BR MW-200D MW-200D MW-200S MW-200S Round 2 Round 1 Round 2 Round 1 Round 2 10/5/2015 7/14/2015 10/5/2015 7/14/2015 10/5/2015 N N N N N BL-MW-200BR-NS-3Q15 MW-200D BL-MW-200D-NS-3Q15 MW-200S BL-MW-200S-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Uranium, Natural 7440-61-1 T pg/L 0.652 0.502 Radium-226 13982-63-3 T pCi/L 9.84 1.74 Radium-228 15262-20-1 T pCi/L 3 U 3 U Uranium-233 13968-55-3 T pg/L 0.05 U 0.05 U Uranium-234 13966-29-5 T pg/L 0.05 U 0.05 U Uranium-236 13982-70-2 T pg/L - 0.05 U - 0.05 U - Dissolved Oxygen DO N mg/L 0.4 0.96 0.4 1.54 0.2 Temperature TEMP N Deg C 14.2 17.8 16.3 20.86 18 pH PH N 6.5 8.5 02L SU 7.5 6.3 6.1 5.59 5.5 Turbidity, field TURB N NTU 0.1 3.32 9.5 115 43.1 Specific Conductivity (field) SC N PS/cm 398 461 562.5 86 137.9 Oxidation Reduction Potential ORP N my -108.3 443 -22.6 203.9 -47.7 GW Depth (TOC) I GW DEPTH-TOC N ft 0 i i - i i 4.75 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 6 of 6 Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: Turbidity, field N NTU PPBC FOR SCREENING pH N Su 8.5 02L Arsenic T ug/I 10 02L Chromium T ug/I 10 02L Iron T ug/I 300 02L Manganese T ug/I 50 02L Chromium (VI) T ug/I 0.07 DHHS Antimony T ug/I 1 IMAC Arsenic T ug/I 10 02L Beryllium T ug/I 4 IMAC Boron T ug/I 700 02L Cadmium T ug/I 2 02L Chromium T ug/I 10 02L Cobalt T ug/I 1 IMAC PPBC (Minimum (for ranges)): PPBC: - 10 4.9 8.5 - 5 - 8 - 1820 - 96.2 - 3.2 - 5 - 5 - 0.33 - 50 - 1 - 8 - 0.9 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 AB-1D WG Round 1 7/10/2015 11.02 5.64 12800 J- 40.9 AB-11D WG Round 2 10/1/2015 7 5.9 15100 37.1 AB-1S WG Round 1 7/10/2015 14.54 5.9 39 12700 39.7 41 AB-1S WG Round 2 10/1/2015 85.1 5.8 44.6 18100 - 39 AB-21D WG Round 1 7/15/2015 9.47 5.74 14700 - 11400 108 AB-21D WG Round 2 10/1/2015 9.4 5.9 - 11900 - 89.2 AB-2S WG Round 1 7/15/2015 8.21 11.06 17.5 383 14 8.1 - 19.4 - AB-2S WG Round 2 9/30/2015 41.34 10.92 - - - 3.4 - 17 2.9 AB-31D WG Round 1 7/10/2015 1.63 - - 2400 - 2.1 AB-31D WG Round 2 9/28/2015 4.24 4.5 10.6 2300 2 AB-3S WG Round 1 7/11/2015 3.89 6.01 - - 13200 11.3 AB-3S WG Round 2 9/28/2015 7.61 5.87 - 16600 14.8 AB-4BR WG Round 1 7/16/2015 8.62 11.18 7.5 - - - AB-4BR WG Round 2 10/1/2015 9.5 11.2 - 2.6 AB-41D WG Round 1 7/16/2015 8.18 6.19 AB-41D WG Round 2 10/1/2015 0.7 6 - - AB-4S PW Round 1 7/15/2015 0.26 - 59.2 5150 387 81.2 21900 J AB-4S PW Round 2 10/1/2015 2.5 - - - - - 92.7 - - AB-4SL PW Round 1 7/16/2015 26.24 10.18 48.7 8.1 67.6 13500 1.1 AB-4SL PW Round 2 10/1/2015 9.9 10.5 - - 9.8 71.1 13300 - AB-5D WG Round 1 7/14/2015 130.5 - 132 - - - 1.1 AB-51D WG Round 2 10/1/2015 42.43 - - - - - AB-5S PW Round 1 7/15/2015 0.25 71.7 644 93.3 11100 - AB-5S PW Round 2 10/1/2015 1.56 - - - - 69.2 6600 5.6 AB-5SL PW Round 1 7/14/2015 13.11 9.59 41.7 J+ 1430 8.9 45.2 15000 - AB-5SL PW Round 2 10/1/2015 7.81 9.99 - - - 10.5 51.8 16300 AB-61D WG Round 1 7/8/2015 26 - 110 J+ - - - AB-6D WG Round 2 10/1/2015 2.9 - AB-6S PW Round 1 7/8/2015 4.93 726 J+ AB-6S PW Round 2 10/1/2015 1.1 - 3.6 - - AB-6SL PW Round 1 7/9/2015 7.71 3580 J+ 177 - 11.8 1600 AB-6SL PW Round 2 10/1/2015 1.3 - - 13.2 1100 AB-71D WG Round 1 6/16/2015 2.5 10.5 - - - AB-7D WG Round 1 7/9/2015 8.66 9.06 423 J+ AB-71D WG Round 2 9/28/2015 3.2 - - - - - AB-7S PW Round 1 6/16/2015 1.5 5.7 24.9 J+ 4800 155 J+ AB-7S PW Round 1 7/13/2015 4.14 5.75 32.8 3000 243 - AB-7S PW Round 2 9/29/2015 10 4.2 108 7.8 1300 3.7 354 J+ AB-81) WG Round 1 6/17/2015 5.7 6.2 - - - - - 1.2 AB-81D WG Round 1 7/13/2015 13.85 6.05 721 163 - AB-8D WG Round 2 10/1/2015 78 6 - - - - 1.5 AB-8S PW Round 1 6/16/2015 1.4 6.2 - 30.7 2200 3.4 AB-8S PW Round 2 10/1/2015 2.1 6.1 1.1 - 1600 6.9 AB-8SL PW Round 1 6/17/2015 6.6 10.6 15.2 146 13000 - AB-8SL PW Round 1 7/13/2015 8.56 10.14 120 J+ - - - AB-8SL PW Round 2 10/1/2015 9.5 8.6 - 12.3 139 13800 AB-9BR WG Round 1 7/16/2015 18.5 9.12 60.8 - - - AB-9BR WG Round 2 10/1/2015 3.1 - - 12.9 AB-91D WG Round 1 7/16/2015 23.2 184 AB-91D WG Round 2 10/1/2015 5.5 - - AB-9S WG Round 1 7/15/2015 3.72 4.47 611 21.4 AB-9S WG Round 2 10/1/2015 1.3 5.2 13.9 BC-23A WG Round 4 12/16/2015 - - 0.34 - BC-28 WG Round 4 12/16/2015 - - 0.49 BG-1D WG Round 1 7/14/2015 7.4 6.3 - 1.5 - BG-1D WG Round 2 9/29/2015 2.1 5.8 54.4 - 2 BG-1D WG Round 3 11/12/2015 1.33 5.73 - 0.096 1.8 BG-1D WG Round 12/16/2015 3.4 5.9 1.6 BG-2BR WG Round 1 7/9/2015 8.54 9.04 - - BG-2BR WG Round 2 9/29/2015 4.9 9.2 0.7 1.4 BG-2BR WG Round 3 11/12/2015 9.84 9.43 0.4 J+ 1.3 BG-2BR WG Round 4 12/16/2015 10 9.7 0.6 1.5 BG-2D WG Round 1 7/9/2015 9.25 - - BG-2D JWG Round 2 9/29/2015 1.5 0.12 BG-21D JWG Round 3 11/12/2015 4.06 6.48 0.12 J+ BG-2D JWG Round 4 12/16/2015 2.4 0.15 BG-2S JWG Round 1 7/9/2015 8.33 5.78 rBG-2S WG Round 2 9/29/2015 9.9 5.8 313 1 1.4 1 of 6 Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: Turbidity, field N NTU PPBC FOR SCREENING pH N Su 8.5 02L Arsenic T ug/I 10 02L Chromium T ug/I 10 02L Iron T ug/I 300 02L Manganese T ug/I 50 02L Chromium (VI) T ug/I 0.07 DHHS Antimony T ug/I 1 IMAC Arsenic T ug/I 10 02L Beryllium T ug/I 4 IMAC Boron T ug/I 700 02L Cadmium T ug/I 2 02L Chromium T ug/I 10 02L Cobalt T ug/I 1 IMAC PPBC (Minimum (for ranges)): PPBC: - 10 4.9 8.5 - 5 - 8 - 1820 - 96.2 - 3.2 - 5 - 5 - 0.33 - 50 - 1 - 8 - 0.9 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 BG-2S WG Round 3 11/12/2015 9.54 5.75 1.3 J+ BG-2S WG Round 4 12/16/2015 5.8 6 1.3 BG-31D WG Round 1 7/18/2015 93 6.19 BG-3D WG Round 2 9/30/2015 8.9 BG-31D WG Round 3 11/12/2015 BG-31) WG Round 4 12/16/2015 - - 0.091 BG-3S WG Round 1 7/18/2015 4.02 5.29 BG-3S WG Round 2 9/30/2015 15.4 5.4 0.22 J 1.9 BG-3S WG Round 3 11/17/2015 - - 0.28 BG-3S WG Round 4 12/16/2015 0.25 CRW-10 WG Round 4 12/16/2015 0.72 J+ GWA-10D WG Round 1 7/18/2015 7.21 11.98 - 1.6 GWA-10D JWG Round 2 10/2/2015 9.2 11.4 4.9 - GWA-10S WG Round 1 7/18/2015 7.14 4.14 30.4 GWA-10S WG Round 2 10/2/2015 8.9 4.4 32.2 GWA-11D WG Round 1 7/18/2015 9.5 6.4 1.6 GWA-11D WG Round 2 10/2/2015 11.91 2.8 24.1 3 GWA-11S WG Round 1 7/18/2015 3.13 5.59 - 6.6 - 7.4 GWA-11S WG Round 2 10/2/2015 6.28 5.2 10.9 66.2 13.2 GWA-12BR IWG Round 1 7/17/2015 10.08 - - - GWA-12BR WG Round 2 9/30/2015 4.73 GWA-12D WG Round 1 7/17/2015 38.74 - 345 J+ GWA-12D WG Round 2 10/2/2015 3.9 5.7 GWA-12S WG Round 1 7/17/2015 7.44 6.08 639 195 J+ GWA-12S WG Round 2 10/2/2015 9 6 - - GWA-16D WG Round 1 7/16/2015 9.6 11.52 - 1.5 J+ GWA-16D IWG Round 2 9/29/2015 5.4 11 0.77 2.3 - GWA-16S WG Round 1 7/16/2015 70 5.43 - - 5.6 GWA-16S WG Round 2 9/29/2015 9 5.2 83.2 4.2 GWA-17D WG Round 1 7/15/2015 3.25 10.29 - GWA-17D WG Round 2 9/29/2015 13.13 8.68 592 J - GWA-17S WG Round 1 7/15/2015 21.7 - - 50.7 2.6 GWA-17S WG Round 2 9/29/2015 7.94 6.37 650 730 27.6 6.4 GWA-1D WG Round 1 7/12/2015 11.66 - - - 1.6 GWA-1D WG Round 2 9/30/2015 9.9 37.1 3.4 GWA-1S WG Round 1 7/12/2015 8.32 4.94 6 29.7 10 GWA-1S WG Round 2 9/30/2015 - 6.5 32.1 7.4 GWA-21D WG Round 1 7/11/2015 7.4 6.37 - - 1.1 GWA-21D WG Round 2 9/30/2015 2 6.1 - GWA-2S WG Round 1 7/11/2015 11.74 5.29 2 GWA-2S WG Round 2 9/30/2015 2 4.9 - GWA-3D WG Round 1 7/15/2015 5.43 5.81 0.6 GWA-31D WG Round 2 10/1/2015 13.45 6 - GWA-3S WG Round 2 9/30/2015 4.5 6 - 497 11.8 GWA-41D WG Round 1 7/14/2015 8.3 - 11.8 J+ - 3.7 1.8 - GWA-4D WG Round 2 10/1/2015 6.02 - - - GWA-5BR2 WG Round 1 7/13/2015 3.02 10.08 0.16 1.3 GWA-5BR2 WG Round 2 9/29/2015 1.2 9.4 - - GWA-5D IWG Round 1 1 7/13/2015 4.08 - 1170 GWA-5D WG Round 2 9/28/2015 7.6 - - - GWA-5S WG Round 1 7/14/2015 10.5 5.74 478 2.2 2.5 GWA-5S WG Round 2 9/28/2015 4.9 5.8 - - - GWA-6D WG Round 1 7/16/2015 9.43 2.9 GWA-6D WG Round 2 10/2/2015 9 - GWA-6S WG Round 1 7/16/2015 5.49 4.36 2.5 GWA-6S WG Round 2 10/2/2015 9.6 4.9 1.7 GWA-7D WG Round 1 7/15/2015 5.81 9.08 - GWA-7D WG Round 2 10/2/2015 7 1.1 - GWA-7S WG Round 1 7/15/2015 4.92 4.91 15.9 GWA-7SA WG Round 2 10/2/2015 7.9 4.5 11.2 GWA-81D WG Round 1 7/15/2015 44.1 - 638 50.6 - GWA-8D WG Round 2 9/29/2015 9 - - - GWA-8S IWG Round 1 7/14/2015 5.46 5.36 708 J+ 1.3 GWA-8S WG Round 2 9/29/2015 8 5.5 - GWA-9D WG Round 1 7/18/2015 1.77 6.36 2.2 GWA-91D WG Round 2 10/2/2015 9.9 6.3 3.9 4.3 GWA-9S WG Round 1 7/18/2015 42.16 5.49 6.8 GWA-9S WG Round 2 9/28/20151 12.5 1 5.5 1 1.4 2of6 Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: Turbidity, field N NTU PPBC FOR SCREENING pH N SU 8.5 02L Arsenic T ug/I 10 02L Chromium T ug/I 10 02L Iron T ug/I 300 02L Manganese T ug/I 50 02L Chromium (VI) T ug/I 0.07 DHHS Antimony T ug/I 1 IMAC Arsenic T ug/I 10 02L Beryllium T ug/I 4 IMAC Boron T ug/I 700 02L Cadmium T ug/I 2 02L Chromium T ug/I 10 02L Cobalt T ug/I 1 IMAC PPBC (Minimum (for ranges)): PPBC: - 10 4.9 8.5 - 5 - 8 - 1820 - 96.2 - 3.2 - 5 - 5 - 0.33 - 50 - 1 - 8 - 0.9 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 MW-102D WG Round 1 6/17/2015 2.4 8800 MW-102D WG Round 1 7/14/2015 7.06 914 J+ 3180 J+ - MW-102S WG Round 1 6/17/2015 2.3 5 2500 413 MW-102S WG Round 1 7/14/2015 2 4.75 304 J+ 19000 J+ - - MW-103D WG Round 1 7/12/2015 7.39 5.42 - 4.4 980 3.8 79.7 MW-103D IWG Round 2 10/5/2015 9.6 5.5 37.6 4.9 1100 2.9 81.5 MW-103S WG Round 1 7/12/2015 4.73 6.39 79.1 - - - 43.9 MW-103S WG Round 2 10/5/2015 30.5 83.6 55.3 MW-104D WG Round 2 10/2/2015 313.1 - - MW-104S WG Round 2 10/2/2015 12.17 5.07 10.9 MW-200BR WG Round 1 7/14/2015 1.04 - 345 J+ 131 J+ - MW-200BR WG Round 2 10/5/2015 0.1 - MW-200D WG Round 1 7/14/2015 3.32 6.3 0.084 - MW-200D WG Round 2 10/5/2015 9.5 6.1 - 1100 - MW-200S WG Round 1 7/14/2015 115 5.59 2850 J+ 475 J+ - 2.4 MW-200S WG Round 2 10/5/2015 43.1 5.5 - 14.3 MW-201D WG Round 1 7/18/2015 17.4 6.2 10.3 - MW-201D WG Round 2 9/29/2015 9.25 6.1 365 2.9 J+ - MW-202BR WG Round 1 7/16/2015 8.03 - - MW-202BR IWG Round 2 1 10/2/2015 4.1 - MW-202BR WG Round 3 11/12/2015 7.35 6 0.22 MW-202BR WG Round 4 12/16/2015 7.9 6.3 0.18 MW-202D WG Round 1 7/16/2015 9.81 6.03 MW-202D WG Round 2 10/2/2015 4.7 6.1 MW-202D WG Round 4 12/16/2015 0.3 5.6 0.28 MW-202S WG Round 1 7/16/2015 6.48 5.45 MW-202S WG Round 2 10/2/2015 3.6 5.8 MW-202S WG Round 4 12/16/2015 2.5 5.4 0.54 MW-203BR WG Round 1 7/18/2015 18.05 - MW-203BR WG Round 2 9/30/2015 9.18 12.3 MW-203D WG Round 1 7/18/2015 22.41 6.49 - MW-203D WG Round 2 9/29/2015 4.81 - 1.5 J+ MW-203S WG Round 1 7/18/2015 5.15 5.62 MW-203S IWG Round 2 9/29/2015 8.69 5.7 0.31 J+ MW-204D WG Round 1 7/18/2015 5.1 5.48 5.7 MW-204D WG Round 2 9/29/2015 7.2 5.6 93.2 - MW-204S WG Round 1 7/18/2015 6.75 5.37 16.5 MW-204S WG Round 2 9/30/2015 9.64 5.36 1820 615 MW-3 WG Round 4 12/16/2015 - - - - 0.83 Notes: 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. Orange indicates concentration greater than PPBC Green indicates concentration less than PPBC pg/L = micrograms per liter SU = standard unit J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high U = results not detected 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 3of6 Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: Iron T ug/I 300 02L Manganese T ug/I 50 02L Selenium T ug/I 20 02L Thallium T ug/I 0.2 IMAC Vanadium T ug/I 0.3 IMAC Total Dissolved Solids N ug/I 500000 02L Chloride N ug/I 250000 02L Sulfate N ug/I 250000 02L PPBC (Minimum (for ranges)): PPBC: - 1820 - 96.2 - 10 - 10 - 7.4 - 169000 - 9810 - 78900 Well Matrix Event Date Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag AB-1D WG Round 1 7/10/2015 1600 2300 0.42 - 2.5 1390000 504000 AB-1D WG Round 10/1/2015 1400 2100 0.38 J 1.4 2010000 482000 AB-1S WG Round 1 7/10/2015 12800 2500 0.31 - 2.5 1400000 470000 AB-1S WG Round 2 10/1/2015 3900 2200 0.48 J 3.7 1670000 500000 AB-2D WG Round 1 7/15/2015 420 J+ 14800 0.4 - 1140000 541000 AB-2D WG Round 2 10/1/2015 1500 - 14500 0.43 - 1540000 458000 AB-2S WG Round 1 7/15/2015 510 J+ - - 47.2 AB-2S WG Round 2 9/30/2015 6000 130 41.6 AB-3D WG Round 1 7/10/2015 - - 0.7 J 1100000 307000 AB-3D WG Round 2 9/28/2015 380 88 - 0.52 J 903000 272000 AB-3S WG Round 1 7/11/2015 320 4000 0.37 - 1430000 496000 AB-3S WG Round 2 9/28/2015 4100 4500 0.5 1.2 1020000 474000 AB-4BR WG Round 1 7/16/2015 - - - 4.1 - - AB-4BR WG Round 2 10/1/2015 4.6 AB-4D WG Round 1 7/16/2015 5 AB-4D WG Round 2 10/1/2015 - 150 J- 3.1 - - AB-4S PW Round 1 7/15/2015 5000 370 0.5 J+ 2340000 783000 AB-4S PW Round 2 10/1/2015 - - 1 1430000 716000 AB-4SL PW Round 1 7/16/2015 370 38.4 0.22 867 595000 - AB-4SL PW Round 2 10/1/2015 530 - 41.6 - 874 J+ 564000 252000 AB-5D WG Round 1 7/14/2015 1100 120 - 9.9 AB-5D WG Round 2 10/1/2015 390 120 4.7 AB-5S PW Round 1 7/15/2015 310 J+ 630 - 0.45 J+ 1110000 298000 AB-5S PW Round 2 10/1/2015 4200 510 0.6 1.4 693000 - AB-5SL PW Round 1 7/14/2015 - - - 99.3 2880000 600000 J+ AB-5SL PW Round 2 10/1/2015 - 85.6 2430000 706000 AB-6D WG Round 1 7/8/2015 110 2.7 - - AB-6D WG Round 2 10/1/2015 - 2.7 AB-6S PW Round 1 7/8/2015 750 - - 5.5 AB-6S PW Round 2 10/1/2015 - 69.6 11.6 AB-6SL PW Round 1 7/9/2015 3700 140 - 0.38 J AB-6SL PW Round 2 10/1/2015 2300 130 0.33 J AB-7D WG Round 1 6/16/2015 - - 7.9 AB-7D WG Round 1 7/9/2015 - - AB-7D WG Round 2 9/28/2015 880 - - 1.9 AB-7S PW Round 1 6/16/2015 77800 J- 6300 1.2 - 887000 395000 AB-7S PW Round 1 7/13/2015 70400 9200 - 1.4 0.43 J 900000 439000 AB-7S PW Round 2 9/29/2015 113000 11700 94.4 4.6 J 7.2 1300000 814000 AB-8D WG Round 1 6/17/2015 - 130 - - 1.1 - - AB-8D WG Round 1 7/13/2015 - - - AB-8D WG Round 2 10/1/2015 660 110 - 1.3 AB-8S PW Round 1 6/16/2015 5120 120 - 0.45 0.84 J AB-8S PW Round 2 10/1/2015 1800 84 59.8 5 1.8 AB-8SL PW Round 1 6/17/2015 - - - - 827 AB-8SL PW Round 1 7/13/2015 - - - AB-8SL PW Round 2 10/1/2015 790 - 0.29 84.6 AB-9BR WG Round 1 7/16/2015 - 91 - - AB-9BR WG Round 2 10/1/2015 410 690 - AB-9D WG Round 1 7/16/2015 700 150 1.3 AB-9D WG Round 2 10/1/2015 830 160 1 AB-9S WG Round 1 7/15/2015 - 720 0.33 J AB-9S WG Round 2 10/1/2015 450 - BC-23A WG Round 4 12/16/2015 - - BC-28 WG Round 4 12/16/2015 - 0.38 J BG-1D WG Round 1 7/14/2015 93 0.75 J BG-1D WG Round 2 9/29/2015 73 - BG-1D WG Round 3 11/12/2015 57 BG-1D WG Round 4 12/16/2015 55 - BG-2BR WG Round 1 7/9/2015 - 7.4 BG-2BR WG Round 2 9/29/2015 9 BG-2BR WG Round 3 11/12/2015 550 7.8 BG-2BR WG Round 4 12/16/2015 - 7.9 BG-2D WG Round 1 7/9/2015 1.4 BG-2D WG Round 2 9/29/2015 0.96 J BG-2D WG Round 3 11/12/2015 1 J BG-2D WG Round 4 12/16/2015 1 BG-2S WG Round 1 7/9/2015 650 0.31 J BG-2S WG Round 2 9/29/20151 0.62 J 4of6 Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: Iron T ug/I 300 02L Manganese T ug/I 50 02L Selenium T ug/I 20 02L Thallium T ug/I 0.2 IMAC Vanadium T ug/I 0.3 IMAC Total Dissolved Solids N ug/I 500000 02L Chloride N ug/I 250000 02L Sulfate N ug/I 250000 02L PPBC (Minimum (for ranges)): PPBC: - 1820 - 96.2 - 10 - 10 - 7.4 - 169000 - 9810 - 78900 Well Matrix Event Date Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag BG-2S WG Round 3 11/12/2015 1600 0.87 J BG-2S WG Round 4 12/16/2015 - 0.47 J BG-3D WG Round 1 7/18/2015 1900 70 0.94 J BG-3D WG Round 2 9/30/2015 - - 0.47 J BG-3D WG Round 3 11/12/2015 0.34 J BG-3D WG Round 4 12/16/2015 0.7 J+ BG-3S WG Round 1 7/18/2015 - BG-3S WG Round 2 9/30/2015 5500 130 9.2 BG-3S WG Round 3 11/17/2015 - - 0.38 J BG-3S WG Round 4 12/16/2015 - 0.69 J+ CRW-10 WG Round 4 12/16/2015 400 0.98 J GWA-10D IWG Round 1 7/18/2015 - 7.9 GWA-10D WG Round 2 10/2/2015 2.9 GWA-10S WG Round 1 7/18/2015 - 800 - GWA-10S WG Round 2 10/2/2015 1100 790 0.25 1.1 GWA-11D WG Round 1 7/18/2015 810 190 - 0.75 J 526000 GWA-11D WG Round 2 10/2/2015 4200 270 - 4.2 541000 GWA-11S WG Round 1 7/18/2015 - 320 0.3 - 578000 GWA-11S WG Round 2 10/2/2015 11700 370 0.53 6.3 - GWA-12BR WG Round 1 7/17/2015 - - - 1.2 GWA-12BR WG Round 2 9/30/2015 51 0.54 J GWA-12D WG Round 1 7/17/2015 330 1.5 GWA-12D WG Round 2 10/2/2015 140 0.36 J GWA-12S WG Round 1 7/17/2015 1900 220 1.7 GWA-12S WG Round 2 10/2/2015 - 74 0.38 J GWA-16D WG Round 1 7/16/2015 10.2 GWA-16D WG Round 2 9/29/2015 9.7 GWA-16S WG Round 1 7/16/2015 610 130 0.64 J GWA-16S WG Round 2 9/29/2015 - 110 0.31 J GWA-17D WG Round 1 7/15/2015 3.4 GWA-17D WG Round 2 9/29/2015 1.6 GWA-17S WG Round 1 7/15/2015 1500 430 1.8 GWA-17S WG Round 2 9/29/2015 18800 740 33.9 GWA-1D WG Round 1 7/12/2015 620 - 1.5 GWA-1D WG Round 2 9/30/2015 1400 - - 1.7 GWA-1S WG Round 1 7/12/2015 780 390 0.34 - GWA-1S WG Round 2 9/30/2015 - 270 0.41 0.57 J GWA-2D WG Round 1 7/11/2015 320 96 - 0.79 J GWA-2D WG Round 2 9/30/2015 - 70 0.55 J GWA-2S IWG Round 1 7/11/2015 1600 84 0.46 J GWA-2S WG Round 2 9/30/2015 - - - GWA-3D WG Round 1 7/15/2015 - - GWA-3D WG Round 2 10/1/2015 570 - 1.5 GWA-3S WG Round 2 9/30/2015 620 490 2.3 GWA-4D WG Round 1 7/14/2015 - - 7.9 GWA-4D WG Round 2 10/1/2015 6.5 GWA-5BR2 WG Round 1 7/13/2015 2.6 GWA-5BR2 WG Round 2 9/29/2015 0.32 J GWA-5D WG Round 1 7/13/2015 1100 0.98 J GWA-5D WG Round 2 9/28/2015 1200 0.84 J GWA-5S WG Round 1 7/14/2015 420 0.58 J GWA-5S WG Round 2 9/28/2015 520 190 0.78 J GWA-6D WG Round 1 7/16/2015 820 160 2.2 GWA-6D WG Round 2 10/2/2015 1000 240 1.2 GWA-6S WG Round 1 7/16/2015 - 540 0.24 - GWA-6S WG Round 2 10/2/2015 450 530 0.26 0.43 J GWA-7D WG Round 1 7/15/2015 - - - 4.5 GWA-7D WG Round 2 10/2/2015 1400 - 4.1 GWA-7S WG Round 1 7/15/2015 - 240 0.53 J GWA-7SA WG Round 2 10/2/2015 3800 180 8.8 GWA-8D WG Round 1 7/15/2015 840 - 1.3 GWA-8D WG Round 2 9/29/2015 590 - 0.46 J GWA-8S WG Round 1 7/14/2015 - 600 0.42 J+ GWA-8S WG Round 2 9/29/2015 920 270 0.33 J GWA-9D WG Round 1 7/18/2015 - - - GWA-9D WG Round 2 10/2/2015 - - 0.33 J GWA-9S WG Round 1 7/18/20151 2200 1 180 1 1 0.23 17.2 GWA-9S WG Round 2 1 9/28/2015 - I - I I - I - 5of6 Table 2-10 Constituents of Interest Evaluation Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Constituent: Fraction: Unit: NC GW Criteria: Criteria Source: Iron T ug/I 300 02L Manganese T ug/I 50 02L Selenium T ug/I 20 02L Thallium T ug/I 0.2 IMAC Vanadium T ug/I 0.3 IMAC Total Dissolved Solids N ug/I 500000 02L Chloride N ug/I 250000 02L Sulfate N ug/I 250000 02L PPBC (Minimum (for ranges)): PPBC: - 1820 - 96.2 - 10 - 10 - 7.4 - 169000 - 9810 - 78900 Well Matrix Event Date Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag Result Flag MW-102D WG Round 1 6/17/2015 910 2500 1270000 407000 MW-102D WG Round 1 7/14/2015 - - - - MW-102S WG Round 1 6/17/2015 2200 21300 0.3 676000 MW-102S WG Round 1 7/14/2015 - - - - - MW-103D WG Round 1 7/12/2015 11600 14500 3.6 661000 280000 MW-103D IWG Round 2 10/5/2015 11300 16300 J- 3.9 794000 - MW-103S WG Round 1 7/12/2015 92200 9200 MW-103S WG Round 2 10/5/2015 89600 10900 J- 0.23 1 667000 MW-104D WG Round 2 10/2/2015 2400 110 7.7 - MW-104S WG Round 2 10/2/2015 430 54 1 MW-200BR WG Round 1 7/14/2015 - 110 - MW-200BR WG Round 2 10/5/2015 110 - MW-200D WG Round 1 7/14/2015 - 0.32 J MW-200D WG Round 2 10/5/2015 95 - MW-200S WG Round 1 7/14/2015 4300 300 8.3 MW-200S WG Round 2 10/5/2015 5200 370 2.7 MW-201D WG Round 1 7/18/2015 630 - 1.6 MW-201D WG Round 2 9/29/2015 - - MW-202BR WG Round 1 7/16/2015 2.3 MW-202BR WG Round 2 10/2/2015 0.82 J MW-202BR WG Round 3 11/12/2015 450 0.71 J MW-202BR WG Round 4 12/16/2015 - 0.59 J MW-202D WG Round 1 7/16/2015 - MW-202D WG Round 2 10/2/2015 0.42 J MW-202D WG Round 4 12/16/2015 - MW-202S WG Round 1 7/16/2015 - MW-202S WG Round 2 10/2/2015 370 0.71 J MW-202S WG Round 4 12/16/2015 750 0.67 J MW-203BR WG Round 1 7/18/2015 - 3.9 MW-203BR WG Round 2 9/30/2015 - 3.1 MW-203D WG Round 1 7/18/2015 690 5 MW-203D WG Round 2 9/29/2015 - - MW-203S WG Round 1 7/18/2015 0.72 J MW-203S IWG Round 2 9/29/2015 - MW-204D WG Round 1 7/18/2015 73 MW-204D WG Round 2 9/29/2015 - - MW-204S WG Round 1 7/18/20151 1800 550 MW-204S WG Round 2 9/30/2015 - MW-3 WG Round 4 t 12/16/20151 1 0.62 J Notes: 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. Orange indicates concentration greater than PPBC Green indicates concentration less than PPBC pg/L = micrograms per liter SU = standard unit J- = estimated concentration, biased low J = laboratory estimated concentration J+ = estimated concentration, biased high U = results not detected 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 6of6 Table 2-11 Surface Water Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: SW-BL-D SW-BL-D SW-BL-U SW-BL-U SW-DR-D SW-DR-D SW-DR-U SW-DR-U Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 7/20/2015 10/5/2015 7/20/2015 10/5/2015 7/20/2015 10/5/2015 7/20/2015 10/5/2015 N N N N N N N N SW-BL-D BL-SW-BL-D-NS-3Q15 SW-BL-U BL-SW-BL-U-NS-3Q15 SW-DR-D BL-SW-DR-D-NS-3Q15 SW-DR-U BL-SW-DR-U-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) 02B Class B Water Supply Surface Water Criteria Unit Aluminum 7429-90-5 D /L 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T 87 pg/L - 130 - 75 J - 2700 - 1600 Antimony 7440-36-0 D /L 0.5 U 0.5 U 0.5 U 0.5 U 0.51 0.44 J 0.5 U 0.5 U Antimony 7440-36-0 T 5.6 /L 0.5 U 0.5 U 0.5 U 0.5 U 0.56 0.55 0.5 U 0.5 U Arsenic 7440-38-2 D 150 /L 0.64 0.61 0.69 0.7 2.8 3.3 0.21 J 0.22 J Arsenic 7440-38-2 T 10 /L 0.66 0.67 0.62 0.73 3.1 4.7 0.26 J 0.41 J Barium 7440-39-3 D /L 17 23 17 18 49 51 16 20 Barium 7440-39-3 T 1000 /L 18 22 18 19 50 66 19 38 Beryllium 7440-41-7 D 6.5 /L 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U 0.2U Beryllium 7440-41-7 T /L 0.2U 0.2U 0.2U 0.2U 0.12J 0.15J 0.2U 0.15J Boron 7440-42-8 D /L 100 130 73 81 8100 5800 50 U 31 J Boron 7440-42-8 T /L 72 69 71 68 7900 4800 50 U 26 J Cadmium 7440-43-9 D 0.15 /L 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T /L 0.08 U 0.08 U 0.08 U 0.08 U 0.042 J 0.055 J 0.08 U 0.08 U Calcium 7440-70-2 T /L 8110 6160 7840 7250 110000 87800 4900 3200 Chromium 7440-47-3 D 11 /L 0.18 J 0.54 0.22 J+ 0.5 U 0.61 0.52 0.62 0.39 J Chromium 7440-47-3 T /L 0.36 J 0.46 J 0.44 J 0.29 J 1.7 1.9 0.87 2.2 Cobalt 7440-48-4 D /L 0.5 U 0.5 U 0.5 U 0.5 U 0.98 0.54 0.5 U 0.5 U Cobalt 7440-48-4 T 3 /L 0.5 U 0.19 J 0.5 U 0.5 U 1.2 1.7 0.22 J 1.2 Copper 7440-50-8 D 2.7 pg/L 8.7 2.6 1.1 J+ 2.5 2.2 8 0.69 J 6.7 Copper 7440-50-8 T /L 1.1 1.8 1.1 1.1 0.84 J 1.9 0.89 J 2.3 Iron 7439-89-6 D /L 50 U 50 U 28 J 170 Iron 7439-89-6 T /L 200 110 3900 2800 Lead 7439-92-1 D 0.54 pg/L 0.83 0.21 0.1 U 0.26 0.2 1.1 0.14 0.73 Lead 7439-92-1 T /L 0.059 J 0.34 0.1 U 0.1 0.26 1.4 0.48 1.9 Magnesium 7439-95-4 T /L 3670 2940 3590 3290 36100 27600 2020 1470 Manganese 7439-96-5 D /L 2.7 J 10 5 U 5 U 220 110 26 12 Manganese 7439-96-5 T /L 8 14 14 12 240 220 J 60 110 Mercury 7439-97-6 T 0.012 /L 0.000505 0.00209 0.000569 0.00122 0.00185 0.00373 0.00233 J+ 0.00532 Methane 74-82-8 N /L 4.8 J+ 2.1 J+ 1.8 J+ 2.9 J+ 4.9 J+ 9.2 J+ 7.7 J+ 7.7 J+ Molybdenum 7439-98-7 D /L 1.7 1.6 1.9 1.4 10.2 8.4 0.16 J 0.5 U Molybdenum 7439-98-7 T 160 /L 1.8 1.8 1.6 1.7 10.1 7.2 0.14 J 0.11 J Nickel 7440-02-0 D 16 /L 0.24 J 0.35 J 0.17 J+ 0.5 U 0.99 1.3 0.36 J 0.68 Nickel 7440-02-0 T 25 /L 0.2 J 0.29 J 0.28 J 0.23 J 1.5 2.1 0.42 J 1.3 Potassium 7440-09-7 T /L 3710 J 3860 J 3660 J 3850 J 4240 J 4210 J 5000 U 5000 U Selenium 7782-49-2 D /L 0.3 J 0.41 J 0.4 J 0.32 J 2.4 2.3 0.5 U 0.5 U Selenium 7782-49-2 T 5 /L 0.38 J 0.39 J 0.36 J 0.37 J 2.6 2.4 0.5 U 0.5 U Sodium 7440-23-5 T /L 7300 7380 7160 7230 8190 6670 3680J 3100J Strontium 7440-24-6 D /L 71 66 73 73 460 380 39 31 Strontium 7440-24-6 T 14000 /L 74 59 74 67 450 350 38 32 Thallium 7440-28-0 D /L 0.017 J 0.024 J 0.026 J 0.1 U 0.53 0.26 0.1 U 0.1 U Thallium 7440-28-0 T 0.24 pg/L 0.016 J 0.033 J 0.02 J 0.031 J 0.55 0.35 0.1 U 0.031 J Vanadium 7440-62-2 D /L 0.93 J 0.73 J 0.73 J 0.63 J 2.7 2.2 1 U 0.83 J Vanadium 7440-62-2 T /L 0.94 J 1 J 0.82 J 0.89 J 3.4 6.3 1.7 4.6 Zinc 7440-66-6 D 36 10 U 11 3.3 J+ 8.5 J 15 3 J 2.6 J 10 U Zinc 7440-66-6 T 10 U 4.5 J 10 U 10 U 2.8 J 11 10 U 12 Total Dissolved Solids TDS N 500000 80000 82000 63000 74000 815000 474000 58000 66000 Total Organic Carbon TOC N I- 3200 4900 3200 2800 J- 2800 5500 5300 6100 Total Suspended Solids TSS N 2500 U 5900 3300 2500 U 9700 67100 13700 64800 Alkalinity, CO3 ALK-CO3 N 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N 29800 26600 28600 31400 23100 19000 20400 13000 Alkalinity, lab ALK-LAB N wa/L 29800 26600 28600 31400 23100 19000 20400 13000 Chloride 16887-00-6 N 230000 pg/L 8000 8500 7800 8200 240000 200000 3300 3600 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 20 U 20 20 U 81 130 170 270 250 Sulfate 14808-79-8 N 250000 /L 8600 10700 8300 10300 66100 64500 1800 4100 Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Dissolved Oxvqen DO N m /L 6.94 4.3 7.52 6 7.84 Temperature TEMP N Deg C 32.9 35.1 26.77 20 20 pH PH N 6 9 SU 7.03 7.43 5.92 7 5.39 Turbidity, field TURB N NTU 1.5 4.21 11.5 9 23.5 Specific Conductivity field SC NPS/cm 129 100 1040 400 68 Oxidation Reduction Potential )RP N mV 68 211 131 200 204.8 GW Depth TOC GW DEPTH-TOC N ft 50 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 1 of 2 Table 2-11 Surface Water Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: SW-BL-D SW-BL-D SW-BL-U SW-BL-U SW-DR-D SW-DR-D SW-DR-U SW-DR-U Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 7/20/2015 10/5/2015 7/20/2015 10/5/2015 7/20/2015 10/5/2015 7/20/2015 10/5/2015 N N N N N N N N SW-BL-D BL-SW-BL-D-NS-3Q15 SW-BL-U BL-SW-BL-U-NS-3Q15 SW-DR-D BL-SW-DR-D-NS-3Q15 SW-DR-U BL-SW-DR-U-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) 02B Class B Water Supply Surface Water Criteria Unit Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter my = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 2 of 2 Table 2-12 Areas of Wetness Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: S-1 S-1 S-2 S-2 S-3 S-3 S-4 S-4 S-5 S-5 S-6 S-6 S-7 S-7 S-8 S-8 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 7/16/2015 10/5/2015 7/16/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/8/2015 N N N N N N N N N N N N N N N N S-1 BL-S-I-NS-3Q15 S-2 BL-S-2-NS-3Q15 S-3 BL-S-3-NS-3Q15 S-4 BL-S-4-NS-3Q15 S-5 BL-S-5-NS-3Q15 S-6 BL-S-6-NS-3Q15 S-7 BL-S-7-NS-3Q15 S-8 BL-S-8-NS-3Q16 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D /L 100 U 100 U 100 U 80 J 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T /L 540 50 J 230 3000 330 300 J 190 100 U Antimony 7440-36-0 D /L 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 0.3 J 0.5 U 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC /L 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 0.69 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Arsenic 7440-38-2 D /L 0.41 J 0.33 J 0.68 0.51 0.55 0.42 J 0.38 J 0.54 1.1 0.73 1.8 2 5 0.5 U 0.5 U Arsenic 7440-38-2 T 10 02L pg/L 0.56 0.36 J 0.81 0.64 1.2 0.98 0.53 4 1.3 0.73 5.3 1.1 J 16.9 6.4 0.14 J 0.13 J Barium 7440-39-3 D /L 20 21 130 110 12 15 44 52 11 10 71 59 36 61 39 56 Barium 7440-39-3 T 700 02L p /L 21 22 130 97 13 16 48 130 12 11 91 55 J 37 52 40 60 Beryllium 7440-41-7 D /L 0.2 U 0.2 U 0.18 J 0.53 0.2 U 0.072 J 0.31 0.5 0.2 U 0.071 J 0.2 U 0.2 U 0.08 J 0.14 J 0.13 J Beryllium 7440-41-7 T 4 IMAC pg/L 0.094 J 0.08 J 0.18 J 0.6 0.1 J 0.16 J 0.48 5.1 0.2 U 0.2 U 0.12 J 0.2 UJ 0.14 J 0.14 J 0.14 J 0.18 J Boron 7440-42-8 D /L 31 J 50 U 110 110 50 U 50 U 50 U 50 U 50 U 50 U 3300 2100 50 U 50 U 75 80 Boron 7440-42-8 T 700 02L pg/L 50 U 50 U 120 89 50 U 50 U 50 U 50 U 50 U 50 U 3900 1700 50 U 50 U 72 68 Cadmium 7440-43-9 D /L 0.08 U 0.08 U 0.08 U 0.1 0.08 U 0.08 U 0.075 J 0.081 0.08 U 0.08 U 0.08 U 0.08 U 0.08 U 0.042 J 0.055 J Cadmium 7440-43-9 T 2 02L /L 0.08 U 0.08 U 0.069 J 0.11 0.08 U 0.08 U 0.072 J+ 0.62 0.08 U 0.08 U 0.058 J 0.08 UJ 0.1 0.055 J 0.033 J 0.069 J Calcium 7440-70-2 T /L 3900 3180 7530 5460 1290 1250 9440 8420 2690 1520 84300 45800 1390 1750 5600 5160 Chromium 7440-47-3 D /L 0.6 0.61 0.54 0.27 J 0.36 J 0.32 J 0.46 J 0.32 J 0.4 J 0.53 0.45 J 0.47 J 0.24 J 0.42 J 0.36 J Chromium 7440-47-3 T 10 02L pg/L 1.5 0.95 0.27 J 0.37 J 11.5 0.33 J 0.35 J 0.52 0.51 0.36 J 1.9 0.8 J 0.67 0.44 J 0.26 J 0.37 J Cobalt 7440-48-4 D /L 0.72 0.64 0.75 1 0.87 0.19 J 0.8 1.1 0.76 0.5 J 0.45 J 3.3 5 0.5 U 0.22 J Cobalt 7440-48-4 T 1 IMAC pg/L 0.98 0.86 0.79 1.3 1.1 0.5 J 0.86 9.8 0.92 0.43 J 1.1 0.69 J 6.7 5.2 0.5 U 0.24 J Copper 7440-50-8 D /L 0.36 J+ 6.5 0.34 J+ 1.5 1.3 1.5 1.1 0.24 J 2.2 7.1 0.22 J 1 U 1.5 1 U 7.8 Copper 7440-50-8 T 1000 02L /L 1 U 0.75 J 0.39 J 0.38 J 1.8 1.2 0.28 J 3.2 5.6 1.1 2.3 0.56 J 0.95 J 1.8 1 U 0.27 J Iron 7439-89-6 D /L 340 120 73 630 120 130 8400 34 J Iron 7439-89-6 T 300 02L pg/L 1300 - 160 - 740 - 13400 - 620 - 590 J - 8200 - 65 Lead 7439-92-1 D /L 0.12 0.83 0.1 U 0.2 0.09 J+ 0.16 0.076 J+ 0.057 J 0.11 J+ 0.83 0.1 IJ 0.1 U 0.14 0.1 U 0.67 Lead 7439-92-1 T 15 02L /L 0.54 0.43 0.1 U 0.15 0.43 J+ 0.42 0.13 J+ 2.7 0.25 J+ 0.3 1.5 0.29 J 0.79 0.54 0.072 J 0.1 U Magnesium 7439-95-4 T /L 2250 2140 8580 6180 880 1030 6530 6190 1640 1070 22000 11500 1200 1410 3130 2900 Manganese 7439-96-5 D /L 60 54 320 210 110 23 70 140 130 78 300 490 460 620 11 31 Manganese 7439-96-5 T 50 02L pg/L 57 51 270 180 110 34 75 340 140 56 440 450 J 460 460 11 31 Mercury 7439-97-6 T 1 02L /L 0.00137 0.00242 J+ 0.000726 0.00121 J+ 0.00433 0.00221 J+ 0.00664 0.000676 0.00284 0.00161 0.00182 0.00169 J 0.013 0.00183 0.00068 0.000756 J+ Methane 74-82-8 N /L 9.1 J+ 58.9 11 J+ 26.7 4.9 J+ 3.4 J+ 13.5 25.2 11.7 7.8 J+ 80.2 48.1 J 6.9 J+ 1230 8.6 J+ 1.4 J+ Molybdenum 7439-98-7 D /L 0.15 J 0.098 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 3.9 0.5 U 0.5 U 0.5 U 0.5 U Molybdenum 7439-98-7 T /L 0.18 J 0.5 U 0.5 U 0.5 U 0.13 J 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 8.1 1.1 J 0.19 J 0.5 U 0.5 U 0.5 U Nickel 7440-02-0 D /L 0.45 J 0.55 3.4 3.3 0.5 U 0.46 J 1.5 1.1 0.4 J 0.53 0.9 0.56 1 0.33 J 0.79 Nickel 7440-02-0 T 100 02L /L 0.66 0.56 3.5 4 4.1 0.59 1.5 7.4 0.38 J 0.38 J 2 1.1 J 0.86 1.1 0.25 J 0.68 Potassium 7440-09-7 T /L 5000 U 5000 U 3860 J 2990 J 5000 U 5000 U 2940 J 3020 J 5000 U 5000 U 6410 4620 J 5000 U 5000 U 5000 U 5000 U Selenium 7782-49-2 D /L 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 1.1 0.5 U 0.5 U 3.5 3.2 Selenium 7782-49-2 T 20 02L /L 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 1.6 0.4 J 0.5 U 0.5 U 3.5 3.9 Sodium 7440-23-5 T /L 3510 J 3360 J 10500 7760 3000 J 2750 J 8860 8690 2880 J 2520 J 13900 11400 3360 J 2950 J 10300 10400 Strontium 7440-24-6 D /L 21 18 98 64 14 16 120 110 28 19 410 310 12 20 45 49 Strontium 7440-24-6 T /L 21 17 99 58 15 15 130 160 29 17 480 290 13 17 45 51 Thallium 7440-28-0 D /L 0.023 J 0.1 U 0.17 0.087 J 0.043 J 0.018 J 0.11 0.11 0.041 J 0.029 J 0.077 J 0.1 U 0.017 J 0.1 U 0.032 J Thallium 7440-28-0 T 0.2 IMAC pg/L 0.034 J 0.02 J 0.15 1 0.11 0.056 J+ 0.056 J 0.12 J+ 0.35 0.059 J+ 0.039 J 0.22 0.056 J 0.12 0.029 J 0.019 J 0.1 U Vanadium 7440-62-2 D /L 0.81 J 0.61 J 1 U 1 U 1 U 1 U 1 U 1 U 1 U 1 U 2.6 1 U 1 U 0.29 J 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 2.6 1.7 0.46 J 1 U 0.5 J 0.34 J 1 U 2.6 0.47 J 0.41 J 9 1.4 J 1.1 0.8 J 0.45 J 0.42 J Zinc 7440-66-6 D /L 10 U 3.3 J 10 U 16 10 U 12 10 U 7.3 J 10 U 7.4 J 4.5 J 27 10 U 18 10 U 6.9 J Zinc 7440-66-6 T 1000 02L liq/L 10 U 2.9 J 10 U 4.1 J 10 U 10 U 3.8 J 19 10 U 2.6 J 14 13 J 10 U 38 10 U 5.1 J Total Dissolved Solids TDS N 500000 02L pg/L 63000 59000 152000 80000 37000 45000 143000 138000 1 49000 41000 509000 402000 25000 U 38000 97000 91000 Total Organic Carbon TOC N /L 1500 2500 1100 1700 2900 3700 740 J 1900 700 J 2300 2100 2100 J 4000 6800 740 J 800 J Total Suspended Solids TSS N /L 7800 13500 2700 5000 U 4000 198000 7000 58100 6800 3900 2700 3500J 45300 49300 2500 U 5000 U Percent Moisture MOIST N % 52.5 44 37.5 75.1 40.2 43.7 76.2 Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 22800 18000 3200 J 2100 J 9200 3800 J 6800 4500 J 15000 8200 66600 52300 11700 13100 20200 19300 Alkalinity, lab ALK-LAB N /L 22800 18000 J- 3200 J 2100 J- 9200 3800 J- 6800 4500 J- 15000 8200 J- 66600 52300 J- 11700 13100 J- 20200 19300 Cation Exchange Capacity CEC N me /100 26 31 30 27 7.8 33 Chloride 16887-00-6 N 250000 02L pg/L 2300 3000 55000 38400 2800 5900 42600 43700 2700 3200 140000 84700 4100 4000 10200 14000 Nitro en, NO2 plus NO3 NO2-NO3 N /L 46 41 76 181 26 11 J 71 26 27 34 250 470 J 20 U 110 350 730 Sulfate 14808-79-8 N 250000 02L pg/L 520 J 2300 1000 U 1300 1100 2400 1000 U 1000 1400 3000 42900 24700 1000 U 1800 8800 9200 J Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U pH PH N 6.5 8.5 02L SU - 6.2J - 5.1J - 5.5J - 5.8J - 5.1J - 6.6J - 5.5J - - Oxidation Reduction Potential ORP N mV 250 J 240 J 250 J 210 J 190 J 290 J Arsenic 7440-38-2 T 10 02L /L 0.555 0.522 0.856 J+ 3.03 0.765 J+ 2.08 J+ 1.49 J+ 0.357 J+ Chromium 7440-47-3 T 10 02L /L 1.23 J+ 0.3 J+ 1.21 0.798 J+ 1.4 1.52 0.348 J+ 0.235 J+ Iron 7439-89-6 T 300 02L pg/L 588 46.3J 734 2000 502 709 1730 190 Manganese 7439-96-5 D /L 56.9 318 131 101 156 365 461 12.5 Manganese 7439-96-5 T 50 02L N /L 63.1 323 125 J+ 95.2 160 J+ 370 J+ 292 J+ 13 J+ As III 7784-46-5 T /L 1 0.568 J+ 0.777 J+ 0.184 J+ 1.9 J- 0.484 J+ 0.335 J+ 2.09 J+ 0.445 J+ As V 10103-60-3 T /L 0.5 U 0.5 U 0.673 1.13 0.281 J 1.74 0.5 U 0.5 U Page 1 of 4 Table 2-12 Areas of Wetness Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: S-1 S-1 S-2 S-2 S-3 S-3 S-4 S-4 S-5 S-5 S-6 S-6 S-7 S-7 S-8 S-8 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 Round 1 Round 2 7/16/2015 10/5/2015 7/16/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/5/2015 7/17/2015 10/8/2015 N N N N N N N N N N N N N N N N S-1 BL-S-I-NS-3Q15 S-2 BL-S-2-NS-3Q15 S-3 BL-S-3-NS-3Q15 S-4 BL-S-4-NS-3Q15 S-5 BL-S-5-NS-3Q15 S-6 BL-S-6-NS-3Q15 S-7 BL-S-7-NS-3Q15 S-8 BL-S-8-NS-3Q16 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Chromium VI 18540-29-9 D 0.07 DHHS /L 0.022 0.02 U 0.01 J 0.02 U 0.062 0.02 U 0.042 Chromium VI 18540-29-9 T 0.07 DHHS /L - - - - - - - 0.02 U - - - - - - - - Fe II 1345-25-1 T /L 18.5 J- 34.9 J+ 92 230 J- 80 212 523 60 Se IV 10102-18-8 T /L 2U 2U 2U 2U 2U 2U 2U 2U Se VI 13410-01-0 T /L 2U 2U 2U 2UJ 2U 2U 2U 3.75 Dissolved OxVqen DO N m /I 8.28 5.7 7.23 5.6 2.54 7.2 6.29 5.8 8.55 4.5 6.39 4.4 3.7 3.7 6.7 Temperature TEMP N Deq C 19.6 15.4 22.5 15.8 20.4 16 18.2 16.4 21.99 16.1 20.68 17.6 20.75 17.6 20.48 pH PH N 6.5 8.5 02L SU 5.59 6.3 5.6 6 5.91 6.4 6.14 6 6.92 6.3 6.6 6.5 6.4 6.3 6.54 Turbidity, field TURB N NTU 11.7 20.2 3.25 5.21 10.6 16.9 10.5 93.2 5.98 7.61 40 6.1 18.2 9.9 1.13 Specific Conductivit field Sc NPS/cm 65 55.8 215 148.8 39.2 37.1 185.8 172.3 162 38.2 766 450.8 58 88.2 122 Oxidation Reduction Potential I ORP N mV 96 89.9 1119 156.9 137.5 170.3 134 160 169.9 1 122.4 71.5 79.3 45.3 6.8 106.4 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 2 of 4 Table 2-12 Areas of Wetness Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: S-9 S-9 S-10 S-11 Round 1 Round 2 Round 1 Round 1 7/17/2015 10/5/2015 7/17/2015 7/17/2015 N N N N S-9 BL-S-9-NS-3Q15 S-10 S-11 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Aluminum 7429-90-5 D /L 160 Aluminum 7429-90-5 T /L 6400 Antimony 7440-36-0 D /L 0.5 U 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 1 IMAC /L 0.5 U 0.5 U 0.5 U 0.5 U Arsenic 7440-38-2 D /L 0.22 J 0.26 J 0.64 2.4 Arsenic 7440-38-2 T 10 02L pg/L 0.32 J 0.9 0.66 2.8 Barium 7440-39-3 D /L 46 16 300 250 Barium 7440-39-3 T 700 02L /L 47 58 300 250 Beryllium 7440-41-7 D /L 0.45 0.1 J 2.2 0.81 Beryllium 7440-41-7 T 4 IMAC pg/L 0.43 0.62 2.2 0.8 Boron 7440-42-8 D /L 2800 50 U 7500 9800 J+ Boron 7440-42-8 T 700 02L pg/L 2800 50 U 7200 J+ 9400 Cadmium 7440-43-9 D /L 0.72 0.08 U 1.1 0.62 Cadmium 7440-43-9 T 2 02L /L 0.81 0.062 J 1.2 0.66 Calcium 7440-70-2 T /L 92200 J- 882 110000 172000 Chromium 7440-47-3 D /L 0.29 J 0.79 0.5 U 0.28 J Chromium 7440-47-3 T 10 02L pg/L 0.43 J 5.2 0.24 J 0.36 J Cobalt 7440-48-4 D /L 1.2 0.72 13.6 72.6 Cobalt 7440-48-4 T 1 IMAC pg/L 1.2 2.7 13.5 74.8 Copper 7440-50-8 D /L 1 0.79 J 10.9 1 U 0.53 J Copper 7440-50-8 T 1000 02L /L 0.44 J 5.7 0.72 J 0.34 J Iron 7439-89-6 D /L 280 Iron 7439-89-6 T 300 02L pg/L - 7400 - - Lead 7439-92-1 D /L 0.1 U 1.5 0.1 U 0.1 U Lead 7439-92-1 T 15 02L /L 0.097 J 7.1 0.1 U 0.1 U Magnesium 7439-95-4 T /L 56100 861 68700 50900 Manganese 7439-96-5 D /L 450 57 5400 8700 J- Manganese 7439-96-5 T 50 02L pg/L 460 120 J- 5300 J+ 8500 Mercury 7439-97-6 T 1 02L /L 0.00173 0.0102 0.0264 0.0131 Methane 74-82-8 N /L 1.5 J+ 8.7 J+ 9.6 J 3 J+ Molybdenum 7439-98-7 D /L 0.5 U 0.5 U 0.5 U 0.5 U Molybdenum 7439-98-7 T /L 0.12 J 0.21 J 0.5 U 0.5 U Nickel 7440-02-0 D /L 11.2 0.52 13.4 12.2 Nickel 7440-02-0 T 100 02L /L 11 1.6 13.5 12.9 Potassium 7440-09-7 T /L 5210 5000 U 8860 5130 Selenium 7782-49-2 D /L 6.3 0.5 U 0.45 J 3.3 Selenium 7782-49-2 T 20 02L /L 6.2 0.3 J 0.35 J 4.3 Sodium 7440-23-5 T /L 37100 2810 J 20600 13800 Strontium 7440-24-6 D /L 320 9.8 840 680 Strontium 7440-24-6 T /L 330 13 840 670 Thallium 7440-28-0 D /L 0.024 J 0.016 J 0.37 0.39 Thallium 7440-28-0 T 0.2 IMAC pg/L 0.06 J 0.1 0.39 J+ 0.41 J+ Vanadium 7440-62-2 D /L 0.33 J 2.2 1 U 1 U Vanadium 7440-62-2 T 0.3 IMAC pg/L 0.64 J 16.6 1 U 1 U Zinc 7440-66-6 D /L 64 3.7 J 6.2 J 9.2 J Zinc 7440-66-6 T 1000 02L /L 63 18 6.1 J 9.1 J Total Dissolved Solids TDS N 500000 02L pg/L 1 791000 54000 1050000 1170000 Total Organic Carbon TOC N /L 2500 7600 900 J 3000 Total Suspended Solids TSS N /L 2500 U 712000 2500 U 5600 U Percent Moisture MOIST N % 38.8 Alkalinity, CO3 ALK-CO3 N pq/L 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 22500 6600 2200 J 4800 J Alkalinity, lab ALK-LAB N /L 22500 6600 2200 J 4800 J Cation Exchange Capacity CEC N me /100 24 Chloride 16887-00-6 N 250000 02L pg/L 8900 2000 414000 434000 Nitro en, NO2 plus NO3 NO2-NO3 N /L 2900 20 U 300 41 Sulfate 14808-79-8 N 250000 02L pg/L 475000 3600 16100 97000 Sulfide 18496-25-8 N /L 100 U 100 U 100 U 100 U pH PH N 6.5 8.5 02L SU - 5.7 J - Oxidation Reduction Potential ORP N mV 320 J Arsenic 7440-38-2 T 10 02L /L 0.5 UJ 0.559 J+ 0.667 J+ Chromium 7440-47-3 T 10 02L /L 0.299 J+ 0.361 J+ 0.388 J+ Iron 7439-89-6 T 300 02L pg/L 85.8J+ 1410 1480 Manganese 7439-96-5 D /L 473 5150 10900 Manganese 7439-96-5 T 50 02L N /L 498 J+ 6250 J+ 11500 J+ As III 7784-46-5 T /L 0.5 U 0.5 U 0.5 U As V 10103-60-3 T /L 0.5 U 0.559 0.667 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 3 of 4 Table 2-12 Areas of Wetness Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: S-9 S-9 S-10 S-11 Round 1 Round 2 Round 1 Round 1 7/17/2015 10/5/2015 7/17/2015 7/17/2015 N N N N S-9 BL-S-9-NS-3Q15 5-10 S-11 Constituent CAS RN Fraction Criteria Min (range only) NCDEQ 02L GWQS, IMACs, DHHS Criteria Source Unit Chromium VI 18540-29-9 D 0.07 DHHS u /L 0.01 J 0.02 U 0.02 U Chromium VI 18540-29-9 T 0.07 DHHS /L Fe II 1345-25-1 T /L 40 U 1260 1260 Se IV 10102-18-8 T /L 2 U 2 U 2 U Se VI 13410-01-0 T /L 6.4 2 U 2 U Dissolved Oxvqen DO N m /I 8.04 5 9.57 11 Temperature TEMP N Deq C 22.69 17.3 22.47 19.49 pH PH N 6.5 8.5 02L SU 6.42 6 7.08 6.71 Turbidity, field TURB N NTU 1.04 220.8 2.95 1.27 Specific Conductivit field Sc NPS/Gm 1036 34.8 1090 1200 Oxidation Reduction Potential I ORP N mV 154.4 -36 38 55.2 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 4 of 4 Table 2-13 NCDEQ Water Sampling Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: 003 003 ABW BCSW-007 BCSW-008 BCSW-008 BCSW-008 BCSW-018A BCSW-018A BCSW-018A BCSW-019 BCSW-019 BCSW-019 Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 Round 1 Round 2 7/17/2015 10/1/2015 7/20/2015 10/5/2015 7/20/2015 7/20/2015 10/5/2015 7/20/2015 7/20/2015 10/5/2015 7/20/2015 7/20/2015 10/5/2015 N N N N N N N N N N N N N 003 BL-003-NS-3Q15 ABW BL-BCSW007-NS-3Q15 BCSW 008 BCSW008 BL-BCSW008-NS-3Q15 BCSW 018A BCSW018A BL-BCSW018A-NS-3Q15 BCSW 019 BCSW019 BL-BCSW019-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) 02B Class B Water Supply Surface Water Criteria Unit Aluminum 7429-90-5 D /L 76 J 100 U 100 U 100 U 100 U Aluminum 7429-90-5 T 87 1 N /L 130 - 71 J - 100 - 220 - 330 Antimony 7440-36-0 D /L 1.1 1.1 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 5.6 /L 1.2 1.2 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Arsenic 7440-38-2 D 150 /L 6.4 10.8 3.1 0.64 0.14 J 0.73 0.71 0.14 J 0.23 J Arsenic 7440-38-2 T 10 u /L 6.9 13.9 3.4 0.78 0.19 J 0.43 J 0.83 0.77 0.23 J 0.28 J Barium 7440-39-3 D /L 73 89 240 19 85 60 17 17 16 28 Barium 7440-39-3 T 1000 /L 79 86 240 18 88 55 19 17 18 28 Beryllium 7440-41-7 D 6.5 /L 0.19 J 0.2 U 0.94 0.2 U 1.1 0.2 U 0.2 U 0.2 U 0.2 U Beryllium 7440-41-7 T /L 0.23 0.2 U 1.1 0.2 U 1.1 0.61 0.2 U 0.2 U 0.094 J 0.13 J Boron 7440-42-8 D /L 15600 16600 9300 77 29 J 28 J 93 75 640 300 Boron 7440-42-8 T /L 15700 13600 9200 66 50 U 27 J 75 65 670 260 Cadmium 7440-43-9 D 0.15 u /L 0.055 J 0.063 J 066 0.08 U 0.068 J - 0.08 U 0.08 U 0.08 U 0.08 U Cadmium 7440-43-9 T /L 0.12 J+ 0.11 0.66 0.08 U 0.077 J 0.14 0.08 U 0.08 U 0.08 U 0.04 J Calcium 7440-70-2 T /L 221000 230000 180000 8770 10400 195000 7760 7450 17900 10800 Chromium 7440-47-3 D 11 /L 0.5 UJ 0.92 0.47 J 0.19 J 0.27 J+ 0.37 J+ 0.24 J 0.39 J+ 0.33 J Chromium 7440-47-3 T /L 1.1 1.9 0.2 J 0.2 J 0.31 J 0.23 J 0.32 J 0.22 J 0.57 0.43 J Cobalt 7440-48-4 D /L 0.23 J 0.91 74.2 0.5 U 4.4 0.5 U 0.5 U 0.21 J 1.3 Cobalt 7440-48-4 T r 3 W u /L 2.2 1.3 75.5 0.16 J 4.1 6.2 0.5 U 0.5 U 0.3 J 1.7 Copper 7440-50-8 D �_ 2.7 = u /L 0.94 J 0.83 J 1.2 2.2 0.81 J+ - 2.1 J+ 2.6 0.91 J+ 2.5 Copper 7440-50-8 T /L 1.3 0.97 J 0.36 J 0.92 J 0.38 J 0.56 J 1.2 1 3.7 1.1 Iron 7439-89-6 D /L 50 U 50 U 5200 50 U 140 Iron 7439-89-6 T /L 110 180 5200 160 860 Lead 7439-92-1 D 0.54 N /L 1 0.1 U 0.1 U 0.054 J 0.18 0.1 U - 0.1 U 0.27 0.1 U 0.21 Lead 7439-92-1 T /L 0.08 J+ 0.13 0.079 J 0.083 J 0.1 U 0.1 U 0.15 0.11 0.14 0.26 Magnesium 7439-95-4 T /L 77000 69900 49900 3600 5670 9380 3530 3380 10700 6110 Manganese 7439-96-5 D /L 84 140 8300 25 1300 1300 5 U 5 U 78 300 Manganese 7439-96-5 T 10.0129u /L 640 110 8400 30 1300 1200 13 17 110 280 Mercury 7439-97-6 T /L 0.00156 0.00174 J+ 0.0157 0.000749 0.00262 0.00188 0.000425 J 0.000982 0.00133 J+ 0.00369 Methane 74-82-8 N /L 10 U 1.7 J+ 4.5 J+ 6.7 J+ 57.5 125 5.2 J+ 4 J+ 5.4 J+ 18.9 Molybdenum 7439-98-7 D /L 22.8 21.5 0.5 U 1.5 0.5 U 1.9 1.5 0.16 J 0.5 U Molybdenum 7439-98-7 T 160 /L 23.2 24.1 0.5 U 1.7 0.5 U 0.5 U 1.8 1.7 0.21 J 0.5 U Nickel 7440-02-0 D 16 u /L 1.5 2.3 12.3 0.2 J 1.1 J+ - 0.88 J+ 0.5 U 0.74 J+ 1.4 Nickel 7440-02-0 T 25 u /L 5.4 3.4 12.3 0.23 J 0.88 4.5 0.2 J 0.19 J 0.8 1.7 Potassium 7440-09-7 T /L 7080 7030 5030 3900 J 5000 U 5470 3680 J 3930 J 2880 J 2770 J Selenium 7782-49-2 D p /L 5.6 6.5 3.3 0.35 J 0.98 0.4 J 0.38 J 0.36 J 0.32 J Selenium 7782-49-2 T 5-W u /L 5.9 7.7 4 0.4 J 0.97 0.98 0.37 J 0.36 J 0.39 J 0.36 J Sodium 7440-23-5 T I pq/L 13200 11900 13000 7630 8950 6370 7200 7430 10600 7280 Strontium 7440-24-6 D /L 880 1000 660 73 98 150 71 73 76 50 Strontium 7440-24-6 T 14000 /L 880 850 660 68 100 140 77 69 86 48 Thallium 7440-28-0 D /L 1.2 0.76 0.36 0.016 J 0.031 J 0.021 J 0.016 J 0.016 J 0.1 U Thallium 7440-28-0 T 0.24 N /L 1.2 0.88 0.39 0.024 J 0.033 J 0.072 J 0.021 J 0.023 J 0.1 U 0.025 J Vanadium 7440-62-2 D /L 5.5 6.2 1 U 0.53 J 1 U 0.95 J 0.64 J 1 U 1 U Vanadium 7440-62-2 T /L 6.4 8.8 1 U 0.8 J 1 U 1 U 1.5 0.89 J 0.68 J 0.61 J Zinc 7440-66-6 D 36 u /L 10 U 10 U 11 18 24 J+ 89 10 U 12 8.4 J+ 14 Zinc 7440-66-6 T /L 18 6.2 J 9.2 J 10 U 25 81 10 U 3 J 10 U 5.4 J Total Dissolved Solids TDS N 500000 u /L 14000000 2240000 1340000 82000 125000 657000 63000 87000 163000 115000 Total Organic Carbon TOC N /L 3900 4000 900 J 2400 J- 870 J 2900 J- 3300 2600 J- 3300 8100 J- Total Suspended Solids TSS N /L 3500 3700 2500 U 2500 U 3000 3000 2500 U 2500 U 2500 U 2600 U Percent Moisture MOIST N % 85.2 39.6 17.1 38.9 Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 26500 29100 5400 30300 18000 16000 28400 28800 30600 12000 Alkalinity, lab ALK-LAB N /L 26500 29100 5400 30300 18000 16000 28400 28800 30600 12000 Cation Exchange Capacity CEC N - me /100g - - - 27 13 12 18 Chloride 16887-00-6 N 230000 u /L 501000 428000 426000 8200 3500 5300 7900 8300 3300 4500 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 20 U 40 36 1 25 78 61 20 U 16 J 150 150 Sulfate 14808-79-8 N 250000 u /L 150000 140000 79700 14300 54300 422000 8600 10300 75100 48300 Sulfide 18496-25-8 N /L 100 U 100 UJ 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U pH PH N 6 9 SU - - - - 6 - 6.6 - 6.4 Oxidation Reduction Potential ORP N mV 230 J- 250 J- 230 J- 220 J- Arsenic 7440-38-2 T 10 /L 5.09 J+ 0.806 J+ 0.5 UJ 0.405 J+ 0.226 J+ Chromium 1 7440-47-3 T /L 1.19 4.71 J+ 0.516 J+ 0.347 J+ 0.331 J+ Iron 7439-89-6 T /L 87.5 J+ 2130 5810 73.2 J+ 584 Manganese 7439-96-5 D /L 109 9180 1310 0.681 J 90.5 Manganese 7439-96-5 T /L 249 J+ 11500 1550 28.5 106 As III 7784-46-5 T /L 0.767 J+ 0.5 UJ 0.5 UJ 0.5 UJ 0.5 UJ Page 1 of 4 Table 2-13 NCDEQ Water Sampling Analytical Results - Round 1 and Round 2 Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Location: Event: Sample Date: Sample Type Code: Sample Name/ID: 003 003 ABW BCSW-007 BCSW-008 BCSW-008 BCSW-008 BCSW-018A BCSW-018A BCSW-018A BCSW-019 BCSW-019 BCSW-019 Round 1 Round 2 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 Round 1 Round 2 Round 1 Round 1 Round 2 7/17/2015 10/1/2015 7/20/2015 10/5/2015 7/20/2015 7/20/2015 10/5/2015 7/20/2015 7/20/2015 10/5/2015 7/20/2015 7/20/2015 10/5/2015 N N N N N N N N N N N N N 003 BL-003-NS-3Q15 ABW BL-BCSW007-NS-3015 BCSW 008 BCSW008 BL-BCSW008-NS-3Q15 BCSW 018A BCSW018A BL-BCSW018A-NS-3Q1 5 BCSW 019 BCSW019 BL-BCSW019-NS-3Q15 Constituent CAS RN Fraction Criteria Min (range only) 02B Class B Water Supply Surface Water Criteria Unit As V 10103-60-3 T /L 4.33 0.806 0.5 U 0.405 J 0.226 J Chromium VI 18540-29-9 D /L 0.41 0.034 J- Fe II 1345-25-1 T /L 40 U 124 J- 605 J- 30 UJ 30 UJ Se IV 10102-18-8 T /L 2.46 2 U 2 U 2 U 2 U Se VI 13410-01-0 T /L 1.56 J 2 U 1.18 J 2 U 2 U Dissolved OxVqen DO N m /I 8.42 6.97 8.37 6.99 4.5 5.85 Temperature TEMP N Deg C 30.22 22.7 16.6 22 35.4 23.6 pH PH N 6 9 SU 7.79 8.1 5.76 7.01 7.72 6.78 Turbidity, field TURB N NTU 5.75 4.55 5.09 3.27 5.2 7.6 Specific Conductivit field Sc N S/cm 1382 192.6 1650 159.8 104.7 206.3 Oxidation Reduction Potential I ORP N mV 191.2 71 136 38.9 193 190 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Page 2 of 4 Table 2-13 NCDEQ Water Sampling Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: BCWW-002 BCWW-002 BCWW-002 HD-11A HD-21 HD-26 HD-7A TF-1 TF-1 TF-2 TF-3 TF-3 Round 1 Round 1 Round 2 Round 1 Round 1 Round 1 Round 1 Round 1 Round 1 Round 1 Round 1 Round 1 7/20/2015 7/20/2015 10/1/2015 7/20/2015 7/17/2015 7/17/2015 7/17/2015 7/17/2015 7/27/2015 7/17/2015 7/20/2015 7/20/2015 N N N N N N N N N N N N BCWW 002 BCWW002 BL-BCWW002-NS-3Q15 HD-11A HD-21 HD-26 HD-7A TF-1 TF-1 TF-2 TF-3 TF-3 Constituent CAS RN Fraction Criteria Min (range only) 02B Class B Water Supply Surface Water Criteria Unit - Aluminum 7429-90-5 D /L 470 Aluminum 7429-90-5 T 87 1 N /L 570 - - - - - - - Antimon 7440-36-0 D /L IOU 1.1 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Antimony 7440-36-0 T 5.6 /L IOU 1.3 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Arsenic 7440-38-2 D 150 /L 2.5 J 2.1 J 2.1 3.6 0.2 J 3.4 5 4.2 3.6 Arsenic 7440-38-2 T 10 u /L 3.8 J 1 3.7 2.2 4.8 0.26 J 4.5 6.8 5.6 3.6 Barium 7440-39-3 D /L 210 310 170 280 120 210 180 200 280 Barium 7440-39-3 T 1000 /L 240 340 180 280 120 220 190 200 290 Beryllium 7440-41-7 D 6.5 /L 4 U 0.28 0.51 2 0.34 0.61 0.55 0.66 2.1 Beryllium 7440-41-7 T /L 4 U 0.47 0.55 1.9 0.34 0.71 0.69 0.75 2.2 Boron 7440-42-8 D /L 147000 J+ 187000 13800 7000 58 11600 13800 J- 11200 7500 Boron 7440-42-8 /L 251000 211000 13200 6700 63 11000 12000 9700 7400 Cadmium 7440-43-9 0.15 u /L 1.6 U 0.08 U 0.36 1.5 0.18 0.71 0.26 0 - 1.9 Cadmium 7440-43-9 /L 1.6 U 0.054 J 0.38 1.5 0.18 0.72 0.3 0.36 2 Calcium 7440-70-2 /L 3080000 3500000 187000 147000 2520 200000 213000 205000 157000 Chromium 7440-47-3 11 /L 10 U 0.5 U 0.42 J 0.25 J 0.27 J 0.5 U 0.5 U 0.18 J 0.22 J Chromium 7440-47-3 /L 10 U 0.48 J 0.99 0.5 U 0.45 J 0.5 U 0.37 J 0.33 J 0.29 J Cobalt 7440-48-4 /L 10 U 0.5 U 31.3 260 122 65.1 42.3 39.9 191 Cobalt 7440-48-4 r 3 u /L 10 U 0.16 J 30.4 268 119 66 44.2 41.5 193 Copper 7440-50-8 �_ 2.7 u /L 20 U 1.7 0.83 J 0.75 J 0.54 J 0.79 J 0.73 J 1.9 Copper 7440-50-8 ID /L 20 U 0.37 J 0.4 J 0.55 J+ 0.77 J+ 0.45 J+ 0.68 J+ 0.63 J+ 0.54 J Iron 7439-89-6 /L 320 Iron 7439-89-6 /L 270 - Lead 7439-92-1 0.54 N /L 2 U 0.76 0.1 U 0.51 1.1 0.57 0.16 0.16 0.31 Lead 7439-92-1 /L 2 U 0.1 U 0.1 U 0.56 1.2 0.47 0.36 J 0.24 J 0.38 Magnesium 7439-95-4 /L 803000 1050000 55200 51400 4200 48900 44900 45800 52500 Manganese 7439-96-5 /L 3700 5300 4000 27200 4200 7800 3700 4400 23100 Manganese 7439-96-5 /L 5000 6000 4000 27000 J- 4200 7500 3800 - 4400 22700 Mercury 7439-97-6 0.012 u /L 0.00561 0.0124 0.00385 0.0112 1 0.154 0.0174 - 0.0352 0.0354 0.0158 Methane 74-82-8 N /L 1.5 J+ 1.5 J+ 5.8 J+ 13.4 J+ 6.2 J+ 10 U 3 J+ - 2.5 J+ 7.5 J+ Molybdenum 7439-98-7 D - /L 35.6 0.46 J 0.89 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Molybdenum 7439-98-7 T 160 /L 12.4 0.36 J 0.85 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U Nickel 7440-02-0 D 16 u /L 10 U 2.5 U 2.7 44 8.3 7.7 4.8 4.8 35.8 Nickel 7440-02-0 T 25 u /L 10 U 1.4 2.8 46.7 8.8 8 1 4.9 5.1 36.7 Potassium 7440-09-7 T /L 32000 45200 5240 5560 5000 U 4650 J 2680 J 3050 J 5710 Selenium 7782-49-2 D /L 10 U 2.5 U 3.3 1.7 1 0.5 U 1.7 2.8 2.3 4.2 Selenium 7782-49-2 T 5 u /L 10 U 3 3.8 74- 0.36 J 5.9 11.2 4.8 Sodium 7440-23-5 T /L 54300 61600 9980 19700 25800 11800 9930 10300 17800 Strontium 7440-24-6 D /L 7300 10900 660 680 26 860 590 610 710 Strontium 7440-24-6 T 14000 /L 9900 12700 660 670 26 770 600 600 710 Thallium 7440-28-0 D /L 2 U 0.1 U 0.41 0.58 0.24 0.42 0.33 0.36 0.49 Thallium 7440-28-0 T 0.24 N /L 2 U 0.039 J 0.42 0.6 0.25 0.36 0.31 J 0.34 J 441 Vanadium 7440-62-2 D /L 20 U 1 U 1 U 1 U 1 U 1 U 1 U 1 U 1 U Vanadium 7440-62-2 T /L 20 U 0.38 J 1 U 1 U 1 U 1 U 0.38 J 1 U 1 U Zinc 7440-66-6 D 36 u /L IOU 10 U 4.3 J 23 20 8.5 J 6 J 5.5 J 17 Zinc 7440-66-6 T /L 100 U 10 U 4 J 24 19 6.6 J 6.4 J 7.5 J 16 Total Dissolved Solids TDS N 500000 u /L 13800000, 500000 U 1290000 1170000 150000 1360000 1200000 1140000 1240000 Total Organic Carbon TOC N /L 20000 26200 840 J 680 J 13500 880 J 850 J 850 J 640 J Total Suspended Solids TSS N /L 10700 26900 2500 U 2500 U 2500 U 5000 U 2500 U 2500 U 2500 U Percent Moisture MOIST N Alkalinity, CO3 ALK-CO3 N /L 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U 5000 U Alkalinity, HCO3 ALK-HCO3 N /L 49100 83500 9900 3200 J 4200 J 6400 2300 J 2800 J 2800 J Alkalinity, lab ALK-LAB N /L 49100 83500 9900 3200 J 4200 J 6400 2300 J 2800 J 2800 J Cation Exchange Capacity CEC N - me /100 - - - - - - - Chloride 16887-00-6 N 230000 u /L 4490000 7700000 436000 438000 J+ 58900 441000 455000 441000 436000 Nitrogen, NO2 plus NO3 NO2-NO3 N /L 450 20 U 20 U 20 U 20 U 20 U 60 82 14 J Sulfate 14808-79-8 N 250000 u /L 854000 1720000 98100 44100 J+ 960 J 113000 115000 107000 48600 Sulfide 18496-25-8 N /L 100 U 100 UJ 100 U 100 U 100 U 100 U 100 U 100 UJ pH PH N 6 9 SU - - - - - - - - Oxidation Reduction Potential ORP N mV Arsenic 7440-38-2 T 10 /L 0.478 J+ 0.5 UJ 0.5 UJ 0.211 J+ 0.5 UJ 0.5 UJ 0.348 J+ 0.5 UJ Chromium 1 7440-47-3 T /L 1.12 J+ 0.192 J+ 0.342 J+ 0.366 J+ 0.397 J+ 0.424 J+ 0.397 J+ 0.586 J+ Iron 7439-89-6 T /L 562 68.8 J+ 1170 4240 293 1 177 168 866 Man anese 7439-96-5 D /L 4930 4930 30800 4760 10600 5520 6400 24400 Manganese 7439-96-5 T usl 6010 5490 28900 J+ 1 4120 J+ I 10300 J+ 5410 J+ 1 1 6460 J+ 1 26300 As III 7784-46-5 T /L 0.304 J+ 0.176 J+ 0.155 J+ 1 0.155 J+ 1 0.398 J+ 1 0.155 J+ I 1 0.155 J+ 1 0.347 J+ Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 3 of 4 Table 2-13 NCDEQ Water Sampling Analytical Results - Round 1 and Round 2 Location: Event: Sample Date: Sample Type Code: Sample Name/ID: BCWW-002 BCWW-002 BCWW-002 HD-11A HD-21 HD-26 HD-7A TF-1 TF-1 TF-2 TF-3 TF-3 Round 1 Round 1 Round 2 Round 1 Round 1 Round 1 Round 1 Round 1 Round 1 Round 1 Round 1 Round 1 7/20/2015 7/20/2015 10/1/2015 7/20/2015 7/17/2015 7/17/2015 7/17/2015 7/17/2015 7/27/2015 7/17/2015 7/20/2015 7/20/2015 N N N N N N N N N N N N BCWW 002 BCWW002 BL-BCWW002-NS-3Q15 HD-11A HD-21 HD-26 HD-7A TF-1 TF-1 TF-2 TF-3 TF-3 Constituent CAS RN Fraction Criteria Min (range only) 02B Class B Water Supply Surface Water Criteria Unit As V 10103-60-3 T /L 0.174 J 0.5 U 0.5 UJ 0.5 UJ 0.5 U 0.5 U 0.194 J 0.5 U Chromium VI 18540-29-9 D I pq/L 0.02 U 0.02 U 0.02 U 0.02 U 0.02 U Fe II 1345-25-1 T /L 30 UJ 30 U 1010 4260 234 127 123 39.6 J- SeIV 10102-18-8 T /L 2U 2U 2U 2U 2U 2U 2U 2U Se VI 13410-01-0 T /L 2U 2U 2U 2U 2U 2U 2U 2U Dissolved Oxvqen DO N m /1 2.37 2.57 7.97 7 6.64 3.62 4.3 5.48 7.23 Temperature TEMP N Deg C 32.7 27.5 15 16.5 15.3 11.3 17.2 14.7 15.4 pH PH N 6 9 SU 6.12 6.3 5.61 4.85 4.99 5.31 5.14 5.16 5.23 Turbidity, field TURB N NTU 6.12 1.58 6.81 1 2.47 2.08 1.5 Specific Conductivit field Sc N PS/cm 157.8 21464 1740 1230 269 1700 1770 1720 1650 Oxidation Reduction Potential I ORP N mV 235 65.5 1 146.7 129.9 219.1 310 1 289.1 302.2 267 Notes: pm = micron pg/L = micrograms per liter pS/cm = microsiemens per centimeter ft = feet mg/L = milligrams per liter mV = millivolts NTU - nephelometric turbidity units pCi/L = picocuries per liter SU = standard unit J = laboratory estimated concentration J- = estimated concentration, biased low J+ = estimated concentration, biased high U = results not detected at concentrations which equal the laboratory's method reporting limit 02B = North Carolina surface water standards as specified in T15 NCAC 02B .0211 and .0216 (amended effective January 2015) 02L = North Carolina groundwater standards as specified in T15A NCAC 02L D = dissolved Deg C = degree Celsius DHHS = North Carolina Department of Health and Human Services DO = dissolved oxygen GW = groundwater GWQS = groundwater quality standard IMAC = Interim Maximum Allow Concentration N = normal NS = no standard T = total TDS = total dissolved solids TOC = total organic carbon Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Page 4 of 4 Table 9-1 Interim Monitoring Plan Sample Locations Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Well ID / Sampling Location Description Approximate Well Total Depth (ft. bgs) Well Screen Length (ft) Top of screen (ft. bgs) Bottom of screen (ft. bgs) Sample Frequency GROUNDWATER WELLS AB-1 D CSA GW 86.0 5 73.0 78.0 Quarterly AB-1S CSA GW 52.0 15 35.0 50.0 Quarterly AB-21D CSA GW 139.0 5 132.0 137.0 Quarterly AB-2S CSA GW 50.0 15 31.0 46.0 Quarterly AB-31) CSA GW 118.0 5 111.0 116.0 Quarterly AB-3S CSA GW 55.0 15 36.0 51.0 Quarterly AB-4BR CSA GW 144.5 5 137.5 142.5 Quarterly AB-4D CSA GW 94.5 5 89.5 94.5 Quarterly AB-4S CSA GW 18.0 15 3.0 18.0 Quarterly AB-4SL CSA GW 61.3 10 51.3 61.3 Quarterly AB-51D CSA GW 104.4 5 97.0 102.0 Quarterly AB-5S CSA GW 18.0 15 3.0 18.0 Quarterly AB-5SL CSA GW 44.0 10 34.0 44.0 Quarterly AB-61) CSA GW 94.6 5 85.0 90.0 Quarterly AB-6S CSA GW 12.0 10 2.0 12.0 Quarterly AB-6SL CSA GW 18.3 5 13.3 18.3 Quarterly AB-7D CSA GW 91.0 5 84.0 89.0 Quarterly AB-7S CSA GW 16.0 15 5.0 15.0 Quarterly AB-81D CSA GW 84.7 5 72.0 77.0 Quarterly AB-8S CSA GW 21.0 15 4.0 19.0 Quarterly AB-8SL CSA GW 54.4 10 37.0 47.0 Quarterly AB-9BR CSA GW 137.3 5 130.0 135.0 Quarterly AB-91D CSA GW 98.0 5 90.0 95.0 Quarterly AB-9S CSA GW 31.0 15 13.0 28.0 Quarterly BC-23A Back round/FGD GW 101.2 25 76.2 101.2 Quarterly BC-28 Back round/FGD GW 60.2 15 45.2 60.2 Quarterly BG-11D Background CSA GW 57.0 5 47.0 52.0 Quarterly BG-1S Background CSA GW 43.0 15 26.1 41.3 Quarterly BG-2BR Background CSA GW 129.5 5 80.5 85.5 Quarterly BG-21D Background CSA GW 80.0 5 70.0 75.0 Quarterly BG-2S Background CSA GW 60.0 15 40.0 55.0 Quarterly BG-31D Background CSA GW 71.0 5 62.0 67.0 Quarterly BG-3S Background CSA GW 44.0 15 25.0 40.0 Quarterly CRW-10 Background/CRL GW 28.0 10 18.0 28.0 Quarterly GWA-1D CSA GW 71.5 5 58.0 63.0 Quarterly GWA-IS CSA GW 36.0 15 19.0 34.0 Quarterly GWA-21D CSA GW 70.0 5 58.0 63.0 Quarterly GWA-2S CSA GW 51.0 15 34.0 49.0 Quarterly GWA-31D CSA GW 59.0 5 45.0 50.0 Quarterly GWA-3S CSA GW 43.0 15 27.0 42.0 Quarterly GWA-41D CSA GW 74.0 5 64.0 69.0 Quarterly GWA-5BR2 CSA GW 109.0 5 80.0 85.0 Quarterly GWA-51D CSA GW 60.5 5 51.8 56.8 Quarterly GWA-5S CSA GW 40.0 15 23.0 38.0 Quarterly GWA-61D CSA GW 109.0 5 101.0 106.0 Quarterly GWA-6S CSA GW 70.0 15 28.0 43.0 Quarterly GWA-7D CSA GW 91.0 5 79.0 84.0 Quarterly GWA-7S CSA GW 43.5 15 27.5 42.5 Quarterly GWA-81D CSA GW 97.0 5 89.0 94.0 Quarterly GWA-8S CSA GW 39.0 15 20.0 35.0 Quarterly GWA-91D CSA GW 90.5 5 83.0 88.0 Quarterly GWA-9S CSA GW 53.0 15 36.0 51.0 Quarterly GWA-10D CSA GW 64.0 5 50.0 55.0 Quarterly GWA-10S CSA GW 26.0 15 4.0 19.0 Quarterly GWA-11D CSA GW 72.0 5 63.0 68.0 Quarterly GWA-11S CSA GW 58.0 15 23.0 38.0 Quarterly GWA-12BR CSA GW 125.0 5 106.0 111.0 Quarterly GWA-12D CSA GW 74.0 5 63.0 68.0 Quarterly GWA-12S CSA GW 59.0 15 40.0 55.0 Quarterly GWA-16D CSA GW 69.0 5 58.0 63.0 Quarterly GWA-16S CSA GW 47.0 15 29.0 44.0 Quarterly GWA-17D CSA GW 57.0 5 50.0 55.0 Quarterly GWA-17S CSA GW 41.5 15 25.0 40.0 Quarterly MW-3 Back round/PHRL GW 49.5 10 39.5 49.5 Quarterly MW-103D Voluntary GW 29.5 7 22.5 29.5 Quarterly MW-103S Voluntary GW 13.4 5 8.4 13.4 Quarterly MW-104D Voluntary GW 83.0 5 78.0 83.0 Quarterly MW-104S Voluntary GW 45.6 10 35.6 45.6 Quarterly CSA GW 50.5 5 45.0 50.0 Quarter M200BR -200D Compliance GW 19.5 5 14.5 19.5 Quarterly MW-200S Compliance GW 12.8 7.6 5.2 12.8 Quarterly Page 1 of 2 Table 9-1 Interim Monitoring Plan Sample Locations Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Well ID / Sampling Location Description Approximate Well Total Depth (ft. bgs) Well Screen Length (ft) Top of screen (ft. bgs) Bottom of screen (ft. bgs) Sample Frequency MW-201D Compliance GW 44.1 10 34.1 44.1 Quarter) MW-202BR Background/CSA GW 130.5 5 98.0 103.0 Quarter) MW-202D Background/ Compliance GW 91.4 5 86.4 91.4 Quarter) MW-202S Background/ Compliance GW 60.0 15 45.0 60.0 Quarterly MW-203BR CSA GW 120.5 5 94.0 99.0 Quarter) MW-203D Compliance GW 91.9 5 86.9 91.9 Quarter) MW-203S Compliance GW 42.5 15 27.5 42.5 Quarter) MW-204D Compliance GW 41.1 5 36.1 41.1 Quarter) MW-204S Compliance GW 36.7 15 18.9 33.9 Quarter) ASH POREWATER WELLS AB-4S CSA GW 18.0 15 3.0 18.0 Quarter) AB-4SL CSA GW 61.3 10 51.3 61.3 Quarter) AB-5S CSA GW 18.0 15 3.0 18.0 Quarter) AB-5SL CSA GW 44.0 10 34.0 44.0 Quarter) AB-6S CSA GW 12.0 10 2.0 12.0 Quarter) AB-6SL CSA GW 18.3 5 13.3 18.3 Quarter) AB-7S CSA GW 16.0 15 5.0 15.0 Quarter) AB-8S CSA GW 21.0 15 4.0 19.0 Quarter) AB-8SL CSA GW 54.4 10 37.0 47.0 Quarter) SURFACE WATER SW-BL-D SW N/A N/A N/A N/A Quarter) SW-BL-U SW N/A N/A N/A N/A Quarter) SW-DR-D SW N/A N/A N/A N/A Quarter) SW-DR-U SW N/A N/A N/A N/A Quarter) ASH BASIN WATER SW-AB1 Ash Basin Water N/A N/A N/A N/A Quarter) SW-AB2 Ash Basin Water N/A N/A N/A N/A Quarter) SW-AB3 Ash Basin Water N/A N/A N/A N/A Quarter) SW-AB4 Ash Basin Water N/A N/A N/A N/A Quarter) SW-AB5 Ash Basin Water N/A N/A N/A N/A Quarter) SW-AB6 Ash Basin Water N/A N/A N/A N/A Quarter) SW-AB7 Ash Basin Water N/A N/A N/A N/A I Quarter) SW-AB8 Ash Basin Water N/A N/A N/A N/A Quarter) SW-AB9 Ash Basin Water N/A N/A N/A N/A Quarter) SW-10 SW N/A N/A N/A N/A Quarter) AREAS OF WETNESS S-1 SP N/A N/A N/A N/A Quarter) S-2 SP N/A N/A N/A N/A Quarter) S-3 SP N/A N/A N/A N/A Quarter) S-4 SP N/A N/A N/A N/A Quarter) S-5 SP N/A N/A N/A N/A Quarter) S-6 SP N/A N/A N/A N/A Quarter) S-7 SP N/A N/A N/A N/A Quarter) S-8 SP N/A N/A N/A N/A Quarter) S-9 SP N/A N/A N/A N/A Quarter) S-10 SP N/A N/A N/A N/A Quarter) S-11 SP N/A N/A N/A N/A Quarter) Page 2 of 2 Table 9-2 Sampling Parameters and Analytical Methods Corrective Action Plan Part 2 Belews Creek Steam Station Ash Basin Analytical Method Chemical Anal to Bottle Requirement Preservative EPA 200.7 Total/Dissolved Metals - Alluminum, Barium, Boron, Calcium (total only), Iron, Lead, Magnesium (total only), Manganese, Potassium (total only), Sodium total only), Strontium, Zinc 2 - 250 mL HDPE Nitric Acid, Ice EPA 200.8 Total/Dissolved Metals - Antimony, Arsenic, Beryllium, Cadmium, Chromium, Cobalt, Copper, Molybdenum, Nickel, Selenium, Thallium (low level), Vanadium low level 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 - S21D Sulfide 125 mL PET Zinc Acetate plus Sodium Hydroxide, Ice SM 5310B TOC 3 - 40 mL glass VOA Phosphoric Acid, Ice SM2320B Alkalinity Total, Bicarbonate, and Carbonate 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 ISodium Hydroxide, Ice Page 1 of 1