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Home My WebLink AboutNC0000396_Asheville Tables_20160831TABLE 1-1 WELL CONSTRUCTION DETAILS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Identification Program Date Installed Monitoring Zone Material Diameter (inches)Northing (ft)Easting (ft) Total Well Depth1 (Feet BGS) Measuring Point TOC Elevation (Feet MSL) Ground Surface Elevation (Feet MSL) Measured Well Depth2 (Feet TOC) Ash Basin ABMW-02 CAMA 3/11/2015 Ash Pore Water PVC 2 644193.446 944173.886 30 25 30 2150.30 2147.48 32.5 ABMW-02S CAMA 3/10/2015 Saprolite PVC 2 644197.299 944173.307 45 35 45 2150.29 2147.43 48.55 ABMW-04 CAMA 3/23/2015 Ash Pore Water PVC 2 643664.02 944356.036 55 50 55 2156.41 2153.10 59 ABMW-04BR CAMA 3/23/2015 Bedrock PVC 2 643658.2 944364.242 81 76 81 2156.41 2153.20 85.1 ABMW-04D CAMA 3/23/2015 Transition Zone PVC 2 643658.738 944355.794 66.5 61.5 66.5 2156.43 2153.23 70.5 ABMW-05BR CAMA 4/2/2015 Bedrock PVC 2 644066.825 945458.711 77 72 77 2137.68 2134.52 80.1 ABMW-05D CAMA 4/2/2015 Transition Zone PVC 2 644060.609 945458.767 40 30 40 2137.51 2134.36 43.06 ABMW-05S CAMA 3/30/2015 Saprolite PVC 2 644055.808 945458.926 27 22 27 2137.21 2134.28 29.97 ABMW-06BR CAMA 3/25/2015 Bedrock PVC 2 643639.995 946150.286 27 22 27 2151.50 2149.31 32.92 ABMW-07 CAMA 4/9/2015 Ash Pore Water PVC 2 642759.518 945404.438 12 7 12 2144.62 2141.64 15.82 ABMW-07BR CAMA 4/9/2015 Bedrock PVC 2 642759.222 945399.069 57 47 57 2144.57 2141.64 61.28 ABMW-07S CAMA 4/9/2015 Saprolite PVC 2 642758.18 945393.851 31 21 31 2144.66 2141.67 34.1 ABMW-08 CAMA 4/28/2015 Ash Pore Water PVC 2 642779.646 946158.894 30 20 30 2165.40 2162.91 33.32 ABMW-11BR CAMA/DATA GAP 12/30/2015 Bedrock PVC 2 643576.4 944794.38 156 136 156 2165.13 2165.48 156 CSA Wells CB-01BR CAMA 4/12/2015 Bedrock PVC 2 643309.762 946467.632 85 75 85 2197.18 2197.18 89.9 CB-01BRL CAMA/DATA GAP 12/20/2015 Bedrock PVC 6 643265.21 946472.63 328 OB OB 2197.43 2200.27 NM CB-01D CAMA BKGRD 4/13/2015 Transition Zone PVC 2 643314.249 946470.176 57 47 57 2197.21 2197.21 59.2 CB-08BR CAMA 4/23/2015 Bedrock PVC 2 645127.296 943045.093 95 85 95 2139.92 2139.92 99.3 CB-08D CAMA 4/22/2015 Transition Zone PVC 2 645122.331 943047.278 36 31 36 2140.52 2140.52 39.43 CB-09BR CAMA BKGRD 4/21/2015 Bedrock PVC 2 645585.6514 944225.4181 93 83 93 2181.11 2178.15 97.85 CB-09SL CAMA BKGRD 4/14/2015 Saprolite PVC 2 645595.2507 944227.571 74 69 74 2181.42 2178.17 78.1 GW-01BR CAMA 4/28/2015 Bedrock PVC 2 644226.305 946513.036 74 64 74 2181.49 2178.11 76.44 GW-01D CAMA 4/27/2015 Transition Zone PVC 2 644229.405 946520.488 44 34 44 2181.32 2178.33 46.45 MW-01BR CAMA 4/9/2015 Bedrock PVC 2 643966.653 946144.16 66 56 66 2170.03 2166.99 70.1 MW-01D CAMA 4/9/2015 Transition Zone PVC 2 643962.563 946147.959 40 35 40 2170.19 2166.95 43.08 MW-02BR CAMA 3/11/2015 Bedrock PVC 2 642718.441 945945.093 77 72 77 2168.03 2164.65 81.2 MW-03BR CAMA 3/31/2015 Bedrock PVC 2 642476.982 945214.383 91 81 91 2141.31 2138.15 95 MW-03D CAMA 3/31/2015 Transition Zone PVC 2 642486.811 945215.216 40 30 40 2142.04 2139.03 42.96 MW-04D CAMA 3/17/2015 Transition Zone PVC 2 642758.697 946389.259 38 33 38 2166.42 2163.27 41.82 MW-05BR CAMA 4/26/2015 Bedrock PVC 2 642369.098 944866.403 43 38 43 2085.74 2085.35 43.3 MW-05D CAMA 4/27/2015 Transition Zone PVC 2 642371.685 944870.236 26 16 26 2085.85 2085.54 26.3 MW-06BR CAMA 4/12/2015 Bedrock PVC 2 642610.67 944767.718 56 46 56 2062.31 2059.28 59.15 MW-06D CAMA 4/13/2015 Transition Zone PVC 2 642608.295 944772.91 28 23 28 2062.73 2059.45 31.25 MW-06S CAMA 4/13/2015 Saprolite PVC 2 642607.038 944778.44 17.5 7.5 17.5 2063.12 2059.85 21.02 MW-07BR CAMA 4/11/2015 Bedrock PVC 2 643619.05 943730.983 70 60 70 2073.58 2070.16 72.89 MW-08BR CAMA 2/3/2015 Bedrock PVC 2 644588.011 943388.961 80 70 80 2123.89 2123.90 82.2 MW-08S CAMA 2/4/2015 Saprolite PVC 2 644584.03 943389.913 40 30 40 2123.34 2123.46 39.8 MW-09BR CAMA 4/20/2015 Bedrock PVC 2 644862.111 943406.689 93 83 93 2145.43 2142.22 65.92 MW-09D CAMA 4/21/2015 Transition Zone PVC 2 644856.171 943403.214 44.5 34.5 44.5 2145.09 2141.82 48.84 MW-09S CAMA 4/21/2015 Saprolite PVC 2 644850.643 943401.141 28 18 28 2144.61 2141.51 31.84 MW-11D CAMA 2/5/2015 Transition Zone PVC 2 646194.603 942186.783 35 25 35 2035.22 2032.44 32.36 MW-12BR CAMA 3/20/2015 Bedrock PVC 2 645001.825 943708.374 105.5 95.5 105.5 2161.88 2158.92 109.8 MW-12D CAMA 3/20/2015 Transition Zone PVC 2 645000.207 943704.17 55.5 50.5 55.5 2161.89 2158.83 57.6 MW-13BR CAMA 2/23/2015 Bedrock PVC 2 645439.848 943740.8 56 46 56 2154.28 2151.48 59.44 MW-13D CAMA 1/30/2015 Transition Zone PVC 2 645440.319 943735.67 41 36 41 2153.97 2151.23 43.06 MW-14BR CAMA 2/4/2015 Bedrock PVC 2 645921.638 942943.861 26 21 26 2076.87 2076.88 24.38 MW-15A CAMA 2/12/2015 Alluvial PVC 2 645527.168 942348.227 6 6 11 2034.60 2031.64 9.88 Screened Interval (Feet BGS) P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-1 Well Construction Data Page 1 of 3 TABLE 1-1 WELL CONSTRUCTION DETAILS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Identification Program Date Installed Monitoring Zone Material Diameter (inches)Northing (ft)Easting (ft) Total Well Depth1 (Feet BGS) Measuring Point TOC Elevation (Feet MSL) Ground Surface Elevation (Feet MSL) Measured Well Depth2 (Feet TOC) Screened Interval (Feet BGS) MW-15BR CAMA 2/12/2015 Bedrock PVC 2 645533.236 942347.132 112 102 112 2034.62 2031.68 116.5 MW-15D CAMA 2/12/2015 Transition Zone PVC 2 645539.537 942346.395 48 33 48 2034.41 2031.48 51.63 MW-16A CAMA 3/6/2015 Alluvial PVC 2 644728.661 942586.871 12 7 12 2036.96 2033.85 16.22 MW-16BR CAMA 3/6/2015 Bedrock PVC 2 644724.671 942588.372 47 42 47 2037.02 2033.66 51.52 MW-17A CAMA 2/16/2015 Alluvial PVC 2 644122.021 942913.03 7 2 7 2034.81 2032.16 10.07 MW-18BR CAMA 4/23/2015 Bedrock PVC 2 643580.556 943192.704 33 28 33 2035.54 2032.78 35.65 MW-18D CAMA 4/23/2015 Transition Zone PVC 2 643583.294 943186.685 22 17 22 2035.44 2032.49 24.42 MW-18BRL CAMA/DATA GAP 7/1/2016 Bedrock (lower)PVC 2 643616.404 943166.05 110 100 110 2036.06 2032.58 113.47 MW-19BR CAMA 6/13/2015 Bedrock PVC 2 643013.092 943570.759 55 45 55 2036.18 2033.42 58.56 MW-20A CAMA 6/12/2015 Alluvial PVC 2 642458.09 943846.028 8 3 8 2037.38 2034.18 10.68 MW-21D CAMA 6/25/2015 Transition Zone PVC 2 641783.209 944429.867 14 9 14 2044.23 2044.54 NM MW-22BR CAMA 6/24/2015 Bedrock PVC 2 641599.235 944541.539 47 42 47 2048.98 2049.33 NM MW-22D CAMA 6/24/2015 Transition Zone PVC 2 641604.32 944539.421 26.5 16.5 26.5 2049.06 2049.37 NM MW-23BR CAMA 6/27/2015 Bedrock PVC 2 641966.862 945482.88 57.5 47.5 57.5 2106.44 2103.14 61.55 MW-23DL CAMA 6/15/2015 Transition Zone PVC 2 641967.401 945486.766 26.5 21.5 26.5 2106.26 2103.13 29.6 MW-23DU CAMA 6/17/2015 Transition Zone PVC 2 641966.029 945479.96 16.5 6.5 16.5 2106.36 2103.00 19.06 MW-24BR CAMA 5/7/2015 Bedrock PVC 2 645580.3611 950648.8257 68.2 58.2 68.2 2173.03 2170.44 71.03 MW-24S CAMA 5/5/2015 Saprolite PVC 2 645579.3597 950641.3468 38 28 38 2173.44 2170.89 41.24 Previously Installed Wells CB-1 NPDES/CAMA BKGRD 7/13/2010 Saprolite PVC 2 643345.477 946546.0126 59 44 59 2212.91 2210.41 62.02 CB-2 NPDES 7/14/2010 Saprolite PVC 2 642685.1591 945930.7673 28 12 27 2167.79 2167.79 30.25 CB-3 NPDES 8/16/2010 Transition Zone PVC 2 642516.48 945138.56 35 25 35 2133.23 2130.55 38.53 CB-3R NPDES 10/8/2012 Transition Zone PVC 2 642444.2763 945214.0457 35 25 35 2138.97 2135.83 38.59 CB-4 NPDES 7/13/2010 Saprolite PVC 2 642173.37 944539.22 20 10 20 2067.24 2064.77 22.77 CB-4B NPDES 8/17/2010 Bedrock PVC 2 642177.8233 944537.2873 39 28 38 2066.34 2064.04 41.22 CB-5 NPDES 7/12/2010 Alluvial PVC 2 641932.394 944098.641 7 2 7 2040.49 2037.86 9.27 CB-6 NPDES 7/12/2010 Alluvial PVC 2 643018.5346 943602.5124 6.5 1.5 6.5 2035.48 2032.46 9.73 CB-7 NPDES 7/12/2010 Alluvial PVC 2 643584.343 943192.079 9 4 9 2034.72 2032.00 11.49 CB-8 NPDES 8/17/2010 Bedrock PVC 2 645101.5645 943051.2785 57 47 57 2145.19 2142.49 60.9 CB-9 NPDES/CAMA BKGRD 10/8/2012 Saprolite PVC 2 645590.5 944231.165 62 52 62 2182.08 2178.86 65.6 GW-1 NPDES 8/6/2007 Saprolite PVC 2 644238.8406 946531.794 24 14 24 2181.16 2171.70 26.6 GW-2 UNK 8/7/2007 Bedrock PVC 2 644159.6 943456.3 44.5 29.5 44.5 2094.20 2092.20 47.18 GW-3 UNK 8/7/2007 Saprolite PVC 2 643613.6 943710.2 17 7 17 2071.10 2069.10 19.68 GW-4 UNK 8/6/2007 Transition Zone PVC 2 642665 944495.4 24 14 24 2084.40 2082.50 25.9 GW-53 UNK 8/7/2007 Transition Zone PVC 2 642527.4 945181.5 30 20 30 2138.40 2136.40 32.37 MW-10 CAMA BKGRD 2/24/2014 Alluvial PVC 2 641997.91 948045.12 8 3 8 2171.20 2167.82 11.65 MW-11 CAMA 2/24/2014 Alluvial PVC 2 646195.8 942195.91 8 3 8 2035.00 2031.72 11.36 P-100 UNK 12/4/2014 Saprolite PVC 2 642810.189 944985.522 100.3 80.2 99.9 2164.55 2164.55 101.35 P-101 UNK 12/4/2014 Saprolite PVC 2 642913.542 944784.735 97.4 77.4 97 2164.71 2164.71 98.8 P-102 UNK 11/25/2015 Saprolite PVC 2 643547.213 944773.538 52.8 42.8 52.4 2165.28 2165.28 52.6 P-103 UNK 11/25/2014 Saprolite PVC 2 643790.3 944960.145 54.1 44.1 53.7 2163.90 2163.90 54.15 P-104 UNK 11/26/2014 Saprolite PVC 2 644847.977 943912.409 54.5 44.5 54.1 2174.26 2174.26 54.8 P-105 UNK 11/26/2014 Saprolite PVC 2 645029.624 943789.91 48.3 38.3 47.9 2174.17 2174.17 48.6 PZ-16 UNK 10/18/2006 Transition Zone PVC 2 643153.6 944361.2 52 42 52 2167.00 2164.20 54.55 PZ-17D UNK 10/19/2006 Bedrock PVC 2 643136.2 944195.8 79 69 79 2149.20 2147.40 82.1 PZ-17S UNK 10/19/2006 Bedrock PVC 2 643132.8 944189.8 37 27 37 2148.80 2146.70 40.09 PZ-19 UNK 10/16/2006 Saprolite PVC 2 642899.7 944420.9 24 9 24 2105.40 2102.50 27.05 PZ-22 UNK 10/18/2006 Saprolite PVC 2 642575.4 944801.9 10 5 10 2062.60 2063.00 9.17 PZ-23 UNK 10/23/2006 Saprolite PVC 2 642717 945935.5 29.5 19.5 29.5 2167.70 2164.70 32.28 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-1 Well Construction Data Page 2 of 3 TABLE 1-1 WELL CONSTRUCTION DETAILS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Identification Program Date Installed Monitoring Zone Material Diameter (inches)Northing (ft)Easting (ft) Total Well Depth1 (Feet BGS) Measuring Point TOC Elevation (Feet MSL) Ground Surface Elevation (Feet MSL) Measured Well Depth2 (Feet TOC) Screened Interval (Feet BGS) PZ-24 UNK 10/20/2006 Saprolite PVC 2 642771.9 946416.7 33 23 33 2166.20 2162.90 33.98 PZ-26 UNK 10/24/2006 Saprolite PVC 2 643980.9 946109.2 28 18 28 2168.30 2165.70 29.85 PZ-27 UNK 10/24/2006 Saprolite PVC 2 643832.4 944243.2 60 50 60 2157.00 2153.90 NM AMW-1B UNK 6/24/2014 Bedrock PVC 2 641961.0498 944768.2511 64 54 64 2083.58 2080.53 NM AMW-2A UNK 6/26/2014 Transition Zone PVC 2 642100.6435 945131.5577 30 20 30 2107.93 2104.95 NM AMW-2B UNK 6/26/2014 Bedrock PVC 6 642095.0435 945124.9565 94 OB OB 2107.45 2104.09 NM AMW-3A UNK 7/7/2014 Saprolite PVC 2 641987.4145 948032.1855 72 62 72 2173.37 2169.87 NM AMW-3B CAMA BKGRD 7/7/2014 Bedrock PVC 2 641985.9787 948035.6561 98 88 98 2173.00 2169.62 NM APD-1 UNK UNK Saprolite PVC 2 643664.181 943691.705 NM NA NA 2060.22 NA NM APD-7 UNK UNK Saprolite PVC 2 644738.779 943971.131 NM NA NA 2157.01 NA 37.75 APZ-30 UNK 6/20/2014 Bedrock PVC 6 642200.8 944983.63 218 OB OB 2103.50 2100.31 NM B-1 UNK 6/20/2014 UNK UNK UNK 644207.664 943620.697 NM NM NM 2126.64 2123.73 48.66 B-1-A UNK 6/20/2014 UNK UNK UNK 644209.915 943618.451 NM NM NM 2126.67 2123.36 30.45 B-2 UNK 6/20/2014 UNK UNK UNK 644385.422 943539.606 NM NM NM 2126.40 2123.67 41.6 DP-1 UNK UNK Saprolite PVC 2 644598.121 944155.982 20.73 NM NM 2144.35 NM 20.73 Private Water Supply Wells AS-3 NA UNK Bedrock PVC 6 641518.484 944483.491 121.5 OB OB NM NM NM AS-4 NA UNK Bedrock PVC 6 641518.484 944483.491 180 OB OB NM NM NM DW-4B NA UNK Bedrock PVC 6 641518.484 944483.491 NM OB OB NM NM NM AS-6 NA UNK Bedrock Steel 6 641219.278 944646.615 140.5 OB OB NM NM NM DW-6 NA UNK Bedrock Steel 6 640550.734 944953.816 161.5 OB OB NM NM NM DW-7 NA UNK Bedrock Steel 6 639935.005 944915.272 102 OB OB NM NM NM AS-9 NA UNK Bedrock PVC 6.2 643654.3000 941346.7170 280.7 OB OB 2068.95 2076.51 NM AS-11 NA UNK Bedrock PVC 6.2 641703.5415 942988.9811 798.5 OB OB 2130.89 2129.92 NM AS-13 NA UNK Bedrock PVC 6.1 641817.0340 942860.9997 543.5 OB OB 2148.68 2147.48 NM AS-14 NA UNK Bedrock Steel 5.9 640755.9531 943491.7351 340.3 OB OB 2133.90 2133.62 NM AS-20 NA UNK Bedrock Steel 6 NM NM 221.9 OB OB NM NM NM Stream Staff Gauges A-01 NA 3/1/2016 Surface Water NA NA 645318.846 942407.653 NA NA NA 2029.691 2026.911 NA A-02 NA 3/1/2016 Surface Water NA NA 645312.758 942475.959 NA NA NA 2031.514 2028.570 NA B-01 NA 3/1/2016 Surface Water NA NA 644390.654 942800.472 NA NA NA 2031.833 2028.783 NA C-01 NA 3/1/2016 Surface Water NA NA 643437.769 943272.879 NA NA NA 2030.162 2026.702 NA C-02 NA 3/1/2016 Surface Water NA NA 643720.895 943604.788 NA NA NA 2045.031 2042.100 NA D-01 NA 3/1/2016 Surface Water NA NA 643421.623 943316.994 NA NA NA 2031.024 2027.527 NA MH-17 NA 3/1/2016 Surface Water NA NA 644087.391 942929.650 NA NA NA 2034.365 2031.540 NA N-01 NA 3/1/2016 Surface Water NA NA 646381.850 942827.050 NA NA NA 2031.695 2028.402 NA PW-F NA 3/1/2016 Surface Water NA NA 643879.124 943050.313 NA NA NA 2032.374 2029.395 NA SD-01 NA 3/1/2016 Surface Water NA NA 646408.893 942682.038 NA NA NA 2033.724 2030.502 NA Prepared by: BDW Checked by: TDP Notes: BGS - Below ground surface NF - No Flow OB = Open borehole TOC - Top of casing NM - Not Measured MSL - Mean sea level NA= Not Applicable PVC- Polyvinyl chloride UNK - Data not known 1"Total Well Depth" is the depth to the bottom of the screened interval, as measured during well installation. 2Well depths measured by SynTerra, 2015. 3Total soil boring depth as reported on the monitoring well construction logs. Red text indicates an abandoned well. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-1 Well Construction Data Page 3 of 3 TABLE 1-2 ALLUVIAL GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 2 250 0.07^0.07^1*300 50 20 NE NE 250 0.2*500 0.3*1000 Sample ID Sample Collection Date MW-10 03/05/2014 5.4 5.72 10 72 5.94 226 NM 2.9 NM <50 <1 4.4 NA NA 3.18 207 187 <1 NA NA 0.63 <0.2 55 NA 29 MW-10 04/17/2014 5.0 5.64 12 68 0.3 182 NM 2.9 NM <50 <1 8.3 NA NA NA 1040 573 <1 NA NA 0.41 <0.2 48 NA 17 MW-10 07/23/2014 4.6 5.70 19 67 0.38 244 NM 0.93 NM <50 <1 8.4 NA NA <5 598 363 <1 3.3 NA 0.58 <0.2 44 NA 15 MW-10 11/04/2014 NM NM NM NM NM NM NM NM NM NA <1 NA NA NA 6.11 675 555 <1 3.27 NA NA <0.2 NA NA 17 MW-10 05/12/2015 5.0 5.58 16 64 0.96 47 252 4.09 <0.5 <50 <1 8.9 NA NA 4.29 369 340 <1 4.02 24 0.3 <0.2 44 <0.3 85 MW-10 12/08/2015 5.4 5.79 14 74 0.4 27 232 0.69 0 <50 <0.08 12.6 0.14 NA 3.6 64 200 <0.5 5.09 24 <1 0.13 91 <1 12 MW-10 01/19/2016 5.1 5.62 8 72 0.53 481 686 0.71 0 <50 <1 14 0.17 M1 NA 2.99 63 185 <1 4.85 25 0.29 <0.2 40 <0.3 15 MW-10 04/12/2016 5.1 5.69 13 67 0.37 141 346 1.82 NM <50 <1 12 0.12 NA 2.12 54 B2 142 <1 4.15 24 0.43 <0.2 46 <0.3 14 MW-10 07/08/2016 4.6 5.74 23 70 1.71 S 359 564 6.97 NM <50 <1 15 0.14 NA 2.95 31 175 <1 5.64 26 0.3 <0.2 53 <0.3 17 CB-5 11/18/2010 NM 3.61 14 210 NM NM NM 6.46 NM 283 <0.08 23.3 NA NA NA 24100 415 <10 NA NA 31.5 <0.1 163 NA <10 CB-5 04/12/2011 5.8 3.63 12 235 0.67 -119 86 3.24 NM 169 <0.08 35.4 NA NA NA 22700 424 <10 NA NA 19.9 <0.1 112 NA <10 CB-5 07/14/2011 5.8 3.94 21 268 0.54 -95 111 2.36 NM 295 <0.08 32.3 B NA NA NA 23600 397 <10 NA NA 21 B <0.1 152 B NA <10 CB-5 11/08/2011 5.8 3.58 14 252 1.29 -122 84 9.27 NM 296 <0.08 28 NA NA NA 17400 395 <10 NA NA 25.9 <0.1 165 NA <10 CB-5 04/11/2012 5.9 3.56 13 232 0.55 -87 119 8.49 NM 130 <0.08 25.9 NA NA NA 19300 391 <10 NA NA 11.5 <0.1 134 NA <10 CB-5 07/17/2012 5.9 3.76 20 241 0.57 -16 189 7.97 NM 265 <0.08 26.5 NA NA NA 20200 329 <10 NA NA 17.1 <0.1 141 NA <10 CB-5 11/16/2012 6.0 3.51 13 203 2.48 97 302 3.08 NM 241 <0.08 26.1 NA NA NA 13800 295 <10 NA NA 6.9 <0.1 123 NA <10 CB-5 04/04/2013 5.8 3.33 8 203 2.03 58 263 3.04 NM 149 <1 18 NA NA NA 13400 283 <1 NA NA 6.2 <0.2 130 NA <5 CB-5 07/02/2013 5.6 3.40 18 215 0.46 -119 86 2.61 NM 176 <1 15 NA NA NA 18500 341 <1 NA NA 2.6 <0.2 140 NA <5 CB-5 11/06/2013 5.9 3.72 16 196 0.27 10 215 3.2 NM 186 <1 16 NA NA NA 20400 382 <1 NA NA 5.3 <0.2 120 NA <5 CB-5 04/17/2014 6.0 3.57 12 202 0.3 20 225 5.1 NM 117 <1 16 NA NA NA 21300 466 <1 NA NA 9.2 <0.2 140 NA <5 CB-5 07/10/2014 6.1 3.40 19 237 0.54 -12 193 5.5 NM 182 <1 22 NA NA NA 27400 438 <1 NA NA 3 <0.2 150 NA <5 CB-5 07/24/2014 5.9 9.55 19 226 0.24 -14 NM 7.15 NM 190 <1 21 NA NA <5 24100 434 <1 16 NA 1.4 <0.2 150 NA <5 CB-5 11/04/2014 5.9 3.73 16 255 0.4 15 220 15.3 NM 214 <1 23 NA NA NA 24700 476 <1 NA NA 17 <0.2 150 NA 6 CB-5 04/06/2015 6.7 3.66 12 216 0.51 -29 176 9.16 NM 142 <1 22 NA NA <1 19600 594 <1 15.9 NA 15 0.239 150 NA <5 CB-5 07/09/2015 6.0 5.05 19 230 0.95 -88 117 3.99 NM 209 <1 27 NA NA <1 25400 488 <1 17.4 33 8.9 <0.2 150 0.855 <5 CB-5 11/03/2015 6.1 3.49 17 302 1.27 16 221 4.83 NM 303 <1 22 NA NA <1 29800 761 <1 24.9 55 83 <0.2 180 0.381 <5 CB-5 12/09/2015 5.6 3.55 12 261 3.22 101 306 3.18 4 230 <0.08 22.2 <0.03 NA 0.84 23200 640 <0.5 21.8 50 58 <0.1 178 <1 <10 CB-5 01/18/2016 6.0 3.51 9 273 0.82 30 235 2.18 3 186 <1 22 <0.03 NA <1 26900 625 <1 18.7 42 48 <0.2 130 0.461 <5 CB-5 04/06/2016 6.0 3.61 13 243 1.3 95 300 1.56 NM 152 <1 26 NA NA <1 19400 551 <1 17.1 41 36 <0.2 160 0.385 <5 CB-5 07/07/2016 5.5 4.21 18 290 0.38 40 245 5.42 NM 246 NA 31 NA NA <1 24100 546 <1 21.3 43 43 <0.2 160 0.473 <5 CB-6 11/18/2010 NM 3.53 13 689 NM NM NM 3.99 NM 918 <0.08 38.9 NA NA NA 24600 3430 <10 NA NA 378 <0.1 642 NA <10 CB-6 04/12/2011 5.4 3.44 13 1247 0.71 -105 100 2.92 NM 758 <0.08 40 NA NA NA 32700 5060 <10 NA NA 715 <0.1 1070 NA <10 CB-6 DUP 04/12/2011 5.4 3.44 13 1247 0.71 -105 100 2.92 NM 706 <0.08 41.9 NA NA NA 32900 5080 <10 NA NA 694 <0.1 1050 NA <10 CB-6 07/14/2011 5.6 3.37 21 1090 1.21 -46 159 2.12 NM 918 <0.08 65.4 NA NA NA 37600 4720 <10 NA NA 428 <0.1 789 NA 14.1 CB-6 11/08/2011 5.5 3.26 14 930 2.42 -60 145 6.59 NM 985 <0.08 55.3 NA NA NA 28300 7080 <10 NA NA 353 <0.1 686 NA <10 CB-6 04/10/2012 5.6 3.06 15 737 1.77 -62 143 3.05 NM 758 <0.08 42.4 NA NA NA 17500 4250 <10 NA NA 304 <0.1 621 NA <10 CB-6 07/17/2012 5.7 2.72 21 604 1.39 80 285 6.65 NM 759 0.11 22.5 NA NA NA 10400 2050 <10 NA NA 174 <0.1 346 NA <10 CB-6 11/16/2012 5.2 2.68 11 602 3.96 255 460 9.55 NM 702 0.14 21.9 NA NA NA 3410 3060 <10 NA NA 207 <0.1 406 NA <10 CB-6 04/04/2013 5.8 2.68 9 429 1.29 57 262 6.42 NM 639 <1 13 NA NA NA 7720 1660 <1 NA NA 140 <0.2 250 NA <5 CB-6 07/02/2013 5.5 2.74 20 407 1.63 -15 190 4.9 NM 865 <1 11 NA NA NA 7250 1500 <1 NA NA 110 <0.2 240 NA 6 Analytical Parameter Background Analytical Results Alluvial Field Parameters 15A NCAC 02L Standard Reporting Units P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-2 Alluvial GW Exceedances Page 1 of 3 TABLE 1-2 ALLUVIAL GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 2 250 0.07^0.07^1*300 50 20 NE NE 250 0.2*500 0.3*1000 Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units CB-6 11/06/2013 6.0 3.35 16 343 2.1 49 254 8.8 NM 781 <1 13 NA NA NA 5610 1630 <1 NA NA 100 <0.2 210 NA <5 CB-6 04/17/2014 6.0 4.25 11 511 1 151 356 5.8 NM 629 <1 29 NA NA NA 15400 2690 <1 NA NA 190 <0.2 360 NA <5 CB-6 07/10/2014 5.9 3.32 19 607 0.4 40 245 5.3 NM 827 <1 63 NA NA NA 18100 2620 <1 NA NA 160 <0.2 400 NA <5 CB-6 07/24/2014 5.9 3.54 18 604 0.45 8 NM 9.02 NM 837 <1 61 NA NA <5 18000 2640 <1 28.2 NA 160 <0.2 390 NA <5 CB-6 11/04/2014 5.9 3.63 14 582 1.48 83 288 5.78 NM 806 <1 43 NA NA NA 14600 3010 <1 NA NA 210 <0.2 400 NA <5 CB-6 DUP 11/04/2014 5.9 3.63 14 582 1.48 83 288 5.78 NM 808 <1 41 NA NA NA 16000 3110 <1 NA NA 220 <0.2 410 NA <5 CB-6 04/06/2015 6.0 3.48 11 525 1.3 36 241 8.53 NM 609 <1 37 NA NA 1.42 14600 3330 <1 23.2 NA 170 <0.2 360 NA <5 CB-6 07/08/2015 5.9 4.94 24 745 0.6 -93 112 4.19 NM 807 <1 150 NA NA 2.21 22000 3950 <1 37.4 409 110 <0.2 520 <0.3 <5 CB-6 11/04/2015 3.4 3.27 16 1739 1.39 258 463 1.5 NM 802 <1 66 NA NA 67.3 22100 21800 1.21 54.1 B2 1400 930 <0.2 1300 <0.3 7 CB-6 12/08/2015 3.5 3.46 9 1552 1.8 438 643 2.78 3.5 700 0.49 66.3 <0.03 NA 45.5 16400 18300 1 47.1 1100 870 0.11 1250 <1 34 CB-6 01/21/2016 3.6 3.38 8 1215 3.7 214 419 2.27 1.25 599 <1 55 <0.03 NA 23.6 16600 14300 <1 41 911 590 <0.2 910 <0.3 18 CB-6 04/06/2016 3.7 3.23 11 1139 0.79 443 648 3.13 NM 576 <1 54 NA NA 21.5 19000 13500 <1 40.2 808 590 <0.2 820 <0.3 18 CB-6 07/07/2016 4.7 5.31 22 1122 0.56 243 448 3.41 NM 780 NA 49 NA NA 11.1 25400 10300 <1 51.7 746 580 <0.2 840 <0.3 7 CB-7 11/18/2010 NM 8.06 15 419 NM NM NM 0 NM 259 0.22 121 NA NA NA 342 236 <10 NA NA 53.5 <0.1 319 NA <10 CB-7 11/08/2011 5.5 7.95 16 643 4.8 -52 153 1.19 NM 282 0.14 159 NA NA NA 65.3 95.5 <10 NA NA 49.6 <0.1 372 NA <10 CB-7 07/17/2012 5.4 7.74 20 538 0.99 203 408 0.71 NM 270 <0.08 152 NA NA NA <50 130 <10 NA NA 66.9 <0.1 311 NA <10 CB-7 11/06/2013 5.7 8.03 17 384 3.2 62 267 7 NM 240 <1 68 NA NA NA 816 47 1.92 NA NA 42 <0.2 210 NA <5 CB-7 04/06/2015 5.9 7.73 11 456 6.2 65 270 0.78 NM 233 <1 95 NA NA <1 <10 <5 21.3 23.1 NA 36 <0.2 310 NA <5 CB-7 07/08/2015 5.8 8.65 21 276 4.45 66 271 1.13 NM 263 <1 36 NA NA <1 <10 <5 14.6 19.9 172 56 <0.2 190 0.574 <5 CB-7 11/02/2015 5.2 5.53 17 247 4.7 500 705 1.5 NM 66 <1 41 NA NA <1 20 5 23.2 7.57 225 21 <0.2 180 0.337 <5 CB-7 12/08/2015 5.8 5.82 12 306 2 274 479 1.5 0 88 <0.08 67.1 <0.03 NA 0.58 <50 14 11.3 10.9 320 25.3 <0.1 242 <1 38 CB-7 01/19/2016 5.9 5.79 6 322 1.7 156 361 1.5 0 121 <1 65 <0.03 NA <1 44 14 8.13 14 318 31 <0.2 200 <0.3 86 CB-7 04/06/2016 5.6 7.06 11 727 1.95 296 501 1.21 NM 213 <1 190 NA NA <1 66 40 3.86 49.8 598 31 <0.2 440 <0.3 <5 CB-7 07/07/2016 5.5 8.95 19 670 0.33 313 518 2.16 NM 272 NA 150 NA NA 1.25 86 175 <1 46.1 457 37 <0.2 460 0.372 <5 MW-11 03/05/2014 5.7 7.77 9 365 6.87 211 NM 0.8 NM <50 <1 73 NA NA 2.99 78 221 <1 NA NA 27 <0.2 240 NA 20 MW-11 04/17/2014 5.3 7.35 11 342 3.2 244 NM 0.5 NM <50 <1 80 NA NA NA <10 577 <1 NA NA 19 <0.2 210 NA 10000 MW-11 05/20/2015 5.0 8.61 16 346 1.98 93 298 1.01 <0.5 <50 <1 73 NA NA 2.14 <10 407 <1 25.8 96 25 <0.2 220 <0.3 <5 MW-11 12/08/2015 5.5 6.35 12 488 3.4 238 443 2.81 0 <50 0.1 121 0.65 NA 2 <50 250 <0.5 39.4 130 24.2 0.12 300 <1 <10 MW-11 01/18/2016 5.6 5.99 2 531 3.2 226 431 0.9 0 <50 <1 120 0.48 NA 1.23 25 239 <1 40.1 137 30 <0.2 280 <0.3 5 MW-11 04/07/2016 5.4 7.92 12 452 1.76 255 460 1.1 NM <50 <1 97 0.41 NA <1 <10 281 <1 38.4 125 28 <0.2 220 <0.3 <5 MW-11 07/08/2016 5.4 8.48 18 501 1.11 S 309 514 0.98 0 <50 <1 110 0.26 NA <1 61 113 <1 47 138 30 <0.2 300 <0.3 <5 MW-15A 03/04/2015 5.4 6.23 10 188 2.86 47 252 3.28 0.5 61 <1 43 NA NA 1.25 879 1060 <1 14.8 120 5.3 <0.2 120 <0.3 7 MW-15A 05/20/2015 4.9 7.94 18 167 0.41 151 356 4.73 <0.5 54 <1 34 NA NA <1 217 840 <1 11.7 102 5.3 <0.2 99 <0.3 <5 MW-15A 12/08/2015 5.2 6.11 14 165 1.24 257 462 1.08 0 71 <0.08 39.4 <0.03 NA 0.61 <50 1000 <0.5 13.2 93 5.8 <0.1 <25 <1 <10 MW-15A 01/18/2016 5.1 5.88 5 172 0.7 225 430 0.6 NM 60 <1 43 <0.03 NA <1 43 1000 <1 11.9 100 5.8 <0.2 91 <0.3 <5 MW-15A 04/07/2016 5.0 6.89 13 149 0.13 212 417 0.44 NM <50 <1 36 <0.03 NA <1 63 673 <1 11 90 4.8 <0.2 69 <0.3 <5 MW-15A 07/08/2016 4.9 8.17 17 173 0.73 S 340 545 2.49 0 132 <1 41 <0.03 NA <1 125 385 <1 9.87 118 5.1 <0.2 110 0.373 <5 MW-16A 03/11/2015 5.3 9.63 10 400 0.88 35 240 0.63 0.5 303 <1 93 NA NA 1.01 522 1980 <1 14.9 184 33 <0.2 260 <0.3 <5 MW-16A DUP 03/11/2015 5.3 9.63 10 400 0.88 35 240 0.63 0.5 302 <1 92 NA NA 1.1 538 2000 <1 14.7 186 36 <0.2 260 <0.3 <5 MW-16A 05/28/2015 5.0 9.84 15 432 0.51 12 217 3.17 <0.5 354 <1 97 NA NA 1.35 248 1940 <1 17.5 203 33 <0.2 350 <0.3 <5 MW-16A 12/08/2015 5.1 8.46 15 432 0.61 153 358 2.65 0.5 480 <0.08 132 <0.03 NA 1.4 420 1600 <0.5 22.8 240 46.5 <0.1 355 <1 <10 MW-16A 01/18/2016 5.0 8.41 5 598 0.6 268 473 0.5 0 524 <1 140 0.034 NA 1.33 96 1620 <1 22.1 275 59 <0.2 330 <0.3 <5 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-2 Alluvial GW Exceedances Page 2 of 3 TABLE 1-2 ALLUVIAL GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 2 250 0.07^0.07^1*300 50 20 NE NE 250 0.2*500 0.3*1000 Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units MW-16A 04/08/2016 5.0 9.21 11 509 0.25 264 469 0.65 NM 447 <1 100 <0.03 NA 2 53 1560 <1 19.3 240 65 <0.2 310 <0.3 <5 MW-16A 07/08/2016 4.9 10.18 17 480 0.83 S 343 548 2.39 NM 517 <1 100 0.048 NA 1.81 171 1640 <1 19.3 228 69 <0.2 360 <0.3 <5 MW-17A 03/03/2015 6.3 5.28 8 1331 1.24 22 227 9.4 3 1060 <1 330 NA NA 26.3 8970 12800 <1 15.4 507 140 <0.2 1300 0.401 19 MW-17A 05/21/2015 6.2 6.89 24 1573 0.49 -163 42 6.72 6 1540 <1 390 NA NA 25.8 40600 11900 <1 14 536 160 <0.2 1200 2.63 48 MW-17A 12/09/2015 5.7 5.77 3 1531 2.8 255 460 6.82 NM 2000 <0.08 403 <0.03 NA 22.6 29500 6700 <0.5 14.8 560 144 <0.1 1100 <1 <0.1 B MW-17A 01/19/2016 5.7 5.52 1 1612 0.6 98 303 8.7 2 1940 <1 410 <0.03 NA 22.4 24200 6420 <1 14.1 602 170 <0.2 1100 <0.3 8 MW-17A 04/11/2016 5.8 6.29 12 1688 0.23 69 274 7.27 NM 1980 <1 410 <0.03 NA 22.4 30000 5900 <1 14.9 625 190 <0.2 NA 1.17 6 MW-17A 04/12/2016 5.8 6.29 12 1688 0.23 69 274 7.27 NM NA NA NA NA NA NA NA NA NA NA NA NA NA 1200 NA NA MW-17A 07/12/2016 5.7 6.65 20 1704 0.35 184 389 5.08 NM 2470 NA 430 <0.03 NA 17 35500 5040 <1 14.8 648 190 <0.2 1300 <0.3 <5 MW-20A 06/24/2015 6.0 4.98 21 707 0.68 -93 112 2.43 NM 641 2.01 23 NA NA 16.4 16300 15800 1.18 17.5 548 220 <0.2 480 0.328 10 MW-20A 09/03/2015 6.0 6.66 20 506 0.73 91 296 3.94 1.5 727 <1 24 NA <0.006 <1 3180 10400 <1 18 M4 352 78 <0.2 330 0.458 <5 MW-20A 12/09/2015 5.5 5.02 13 433 1 101 306 8.13 3 630 2.7 16.5 <0.03 NA 37.7 7600 5400 3.5 13.7 310 186 <0.1 294 <1 L3 <10 MW-20A 01/21/2016 5.7 5.14 9 385 1 -186 19 9.73 0.5 625 1.57 13 <0.03 NA 33.8 7110 4610 1.19 12.4 269 180 <0.2 300 <0.3 8 MW-20A 04/13/2016 5.7 3.05 13 464 0.28 89 294 9.45 NM 751 <1 16 <0.03 NA 28.1 6270 8030 <1 14.9 339 190 0.201 320 <0.3 11 AS-3 02/06/2014 5.4 3.44 10 222 4.8 342 NM 1.03 NM <50 NA NA NA NA NA 20 36 NA NA NA NA <0.2 NA NA NA AS-3 (Duke)03/04/2015 NM NM NM NM NM NM NM NM NM <50 <1 59 NA NA 1.03 117 45 <1 28.2 78 14 <0.2 160 <0.3 31 AS-3 (Vendor)03/04/2015 5.0 NM 15 214 4.8 NM NM <1 NM <500 <1 61 <10 NA 1 90 39 <1 29 73 12 <1 140 <5 25 AS-3 02/11/2016 5.0 3.92 11 256 3.44 306 511 2.76 NM <50 <1 60 0.38 NA <1 369 38 <1 27.9 75 12 <0.2 150 <0.3 <5 Prepared by: BER Checked by: TDP Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. Deg C = Degrees Celsius mV = Millivolts mg/L = Milligram per liter ORP = Oxidation Reduction Potential DO = Dissolved oxygen ^ = NC DHHS Health Screening Level. DUP = Duplicate NA = Not analyzed ug/L = Microgram per liter umhos/cm = Micro mhos per centimeter NE = Not established NM = Not measured S.U. = Standard Unit Temp = Temperature Spec Cond = Specific Conductance NTU = Nephelometric turbidity unit ft = Feet Eh = Redox Potential < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10x the concentration in the method blank. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. M1 = Matrix Spike Recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery M4 = The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level. S = Associated calibration check did not meet specified criteria. Water Supply Wells P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-2 Alluvial GW Exceedances Page 3 of 3 TABLE 1-3 SAPROLITE GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Lead Manganese Nickel Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 4*700 2 250 0.07^0.07^10 1*300 15 50 100 10 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date AMW-3A 11/04/2014 NM NM NM NM NM NM NM NM NM <1 <1 <1 NA <1 NA NA NA 12.4 <1 153 <1 22 <1 NA <1 6.54 NA NA <0.2 NA NA AMW-3A 05/12/2015 12.1 8.17 15 2350 5.41 -189 16 1.5 <0.5 <1 <1 <1 <50 <1 1.1 NA NA <1 <1 <10 <1 <5 <1 NA <1 7.7 1220 0.34 <0.2 500 8.98 CB-1 11/17/2010 4.6 47.73 14 15 NM NM NM 9.16 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 1160 <5 46.3 <5 0.51 <10 NA NA <5 <0.1 <25 NA CB-1 04/12/2011 4.4 48.20 17 18 7.57 126 331 4.81 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 589 <5 36.3 <5 0.43 <10 NA NA <5 <0.1 <25 NA CB-1 07/19/2011 4.8 48.40 22 17 7.16 -4 201 17.6 NM <0.5 <5 NA 51.1 <0.08 <5 NA NA 81.5 NA 1330 <5 43 53 B 0.43 <10 NA NA <5 <0.1 <25 NA CB-1 11/09/2011 5.4 50.47 12 19 8.36 -86 119 20.9 NM <0.5 6.7 NA <50 <0.08 <5 NA NA 8.7 NA 17800 6 293 12 0.42 <10 NA NA <5 <0.1 93 NA CB-1 04/10/2012 4.8 49.75 15 16 9.67 -44 161 8.11 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 276 <5 28.4 <5 0.41 <10 NA NA <5 <0.1 <25 NA CB-1 07/16/2012 4.6 49.09 16 20 8.65 317 522 3.65 NM <0.5 <5 NA <50 <0.08 1.6 NA NA <5 NA 179 <5 26.8 <5 0.42 <10 NA NA <2 <0.1 <25 NA CB-1 11/15/2012 4.9 50.89 16 18 7.82 335 540 7.86 NM <0.5 <5 NA <50 <0.08 1.4 NA NA <5 NA 218 <5 28.5 <5 0.36 <10 NA NA <2 <0.1 <25 NA CB-1 04/03/2013 4.5 49.47 15 20 7.89 135 340 4.78 NM <1 <1 NA <50 <1 1.5 NA NA 15 NA 98 <1 27 10 0.43 <1 NA NA <0.1 <0.2 <10 NA CB-1 07/01/2013 5.3 44.71 16 24 8.75 60 265 9.2 NM <1 <1 NA <50 <1 1.7 NA NA <5 NA 2870 <1 67 <5 0.42 1.22 NA NA <0.1 <0.2 <25 NA CB-1 11/05/2013 4.5 43.93 15 18 9.4 413 618 12 NM <1 <1 NA <50 <1 1.6 NA NA <5 NA 664 <1 33 <5 0.42 <1 NA NA 0.15 <0.2 <25 NA CB-1 04/16/2014 4.4 46.05 15 17 8.3 410 615 2.8 NM <1 <1 NA <50 <1 1.7 NA NA <5 NA 152 <1 24 <5 0.42 <1 NA NA 0.18 <0.2 <25 NA CB-1 07/09/2014 4.6 46.41 16 18 8.67 387 592 3.6 NM <1 <1 NA <50 <1 1.7 NA NA <5 NA 215 <1 26 <5 0.45 <1 NA NA 0.12 <0.2 <25 NA CB-1 11/03/2014 4.5 48.24 16 22 7.53 352 557 7.09 NM <1 <1 NA <50 <1 1.7 NA NA <5 NA 175 <1 25 <5 0.4 <1 NA NA 0.17 <0.2 <25 NA CB-1 04/07/2015 4.9 45.50 15 17 8.68 136 341 6.74 NM <1 <1 <1 <50 <1 1.6 NA NA <5 1.94 279 <1 26 <5 0.42 <1 1.04 NA 0.36 <0.2 31 NA CB-1 07/06/2015 4.7 49.12 16 20 8.34 161 366 3.82 NM <1 <1 <1 <50 <1 1.7 NA NA <5 1.95 86 <1 25 <5 1.8 <1 0.993 <5 0.61 <0.2 <25 <0.3 CB-1 11/03/2015 5.1 50.73 16 15 7.9 525 730 21 NM <1 <1 <1 <50 <1 1.2 NA NA 5 4.11 4040 <1 91 <5 1.3 <1 0.893 B2 <5 0.4 <0.2 <25 3.03 CB-1 DUP 11/03/2015 5.1 50.73 16 15 7.9 525 730 21 NM <1 <1 <1 <50 <1 1.2 NA NA <5 4.18 4560 <1 98 6 1.3 <1 0.894 <5 0.54 <0.2 <25 3.21 CB-1 12/08/2015 5.1 50.76 15 15 6.4 69 274 8.8 0 <0.5 <0.5 <0.2 <50 <0.08 1.6 0.031 NA 0.78 1.9 290 <0.1 27 1.4 NA <0.5 <5 <5 <1 <0.1 33 <1 CB-1 01/20/2016 4.9 48.27 10 16 8.32 220 425 7.81 0 <1 <1 <1 <50 <1 2.2 <0.03 NA <1 2.1 279 <1 28 1.53 NA <1 1.03 <5 <0.1 <0.2 <25 <0.3 CB-1 04/07/2016 4.9 44.14 14 17 8.22 329 534 9.74 NM <1 <1 <1 <50 <1 2 <0.03 NA <5 2.36 532 <1 31 <5 1.8 <1 1.17 <5 0.35 <0.2 <25 <0.3 CB-1 07/05/2016 4.8 47.44 23 17 5.44 360 565 8.95 NM <1 <1 <1 <50 <1 1.9 <0.03 NA <5 2.39 595 <1 32 <5 1.8 <1 1.05 <5 0.23 <0.2 <25 0.537 CB-1 DUP 07/05/2016 4.8 47.44 23 17 5.44 360 565 8.95 NM <1 <1 <1 <50 <1 NA NA NA <1 2.32 492 <1 32 1.36 NA <1 NA <5 NA <0.2 NA 0.397 CB-9 11/15/2012 5.0 37.78 15 46 1.66 399 604 8.42 NM <0.5 <5 NA <50 <0.08 6.8 NA NA <5 NA 2880 <5 105 <5 0.38 <10 NA NA <2 0.12 <25 NA CB-9 04/03/2013 4.9 37.18 15 40 7.8 112 317 2.01 NM <1 <1 NA <50 <1 6.5 NA NA <5 NA 370 <1 67 <5 0.33 <1 NA NA 0.2 <0.2 42 NA CB-9 07/01/2013 5.3 34.74 16 48 1.9 38 243 8.43 NM <1 <1 NA <50 <1 6.4 NA NA 6 NA 2080 <1 92 6 0.33 1.12 NA NA 0.11 <0.2 26 NA CB-9 11/05/2013 4.7 35.72 15 38 2.8 378 583 8.7 NM <1 <1 NA <50 <1 6.8 NA NA <5 NA 883 <1 60 <5 0.34 <1 NA NA 0.21 <0.2 28 NA CB-9 04/16/2014 4.8 36.13 15 38 2.2 347 552 3.5 NM <1 <1 NA <50 <1 6.9 NA NA <5 NA 248 <1 39 <5 0.33 <1 NA NA 0.13 <0.2 <25 NA CB-9 07/09/2014 4.8 35.89 16 38 2.59 353 558 5.3 NM <1 <1 NA <50 <1 6.8 NA NA <5 NA 531 <1 47 <5 0.35 <1 NA NA 0.12 <0.2 28 NA CB-9 11/03/2014 4.9 37.18 15 47 2.01 228 433 8.34 NM <1 <1 NA <50 <1 6.9 NA NA <5 NA 341 <1 41 <5 0.29 <1 NA NA 0.14 <0.2 26 NA CB-9 04/07/2015 5.0 37.29 16 38 2.24 114 319 8.79 NM <1 <1 <1 <50 <1 6.7 NA NA <5 1.36 653 <1 50 <5 0.29 <1 4.1 NA 0.24 <0.2 35 NA CB-9 07/06/2015 4.9 37.02 16 41 2.25 159 364 4.5 NM <1 <1 <1 <50 <1 6.7 NA NA <5 <1 158 <1 40 <5 1.2 <1 4.06 8 0.11 <0.2 25 <0.3 CB-9 09/09/2015 5.0 37.50 16 37 1.97 223 428 7.51 NM NA NA NA NA NA NA NA 0.109 NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 11/02/2015 4.5 36.57 16 37 2.7 575 780 9 NM <1 <1 <1 <50 <1 6.6 NA NA <5 1.64 1050 <1 65 <5 1.1 <1 4.07 8 0.36 <0.2 <25 1.33 CB-9 12/08/2015 5.3 37.09 15 36 1.72 204 409 3.38 0 <0.5 <0.5 L1 <0.2 <50 <0.08 6.7 0.1 NA <0.5 0.8 150 <0.1 34 1.2 NA <0.5 <5 7 <1 <0.1 43 <1 CB-9 DUP 12/08/2015 5.3 37.09 15 36 1.72 204 409 3.38 0 <0.5 <0.5 L3 <0.2 <50 <0.08 6.8 0.11 NA <0.5 0.77 91 <0.1 33 1.3 NA <0.5 <5 7.1 <1 <0.1 60 D6 <1 CB-9 01/21/2016 5.2 35.48 15 36 1.8 284 489 1.8 0 <1 <1 <1 <50 <1 6.9 0.12 NA <1 <1 84 <1 36 1.28 NA <1 3.89 7 0.14 <0.2 <25 <0.3 CB-9 04/06/2016 5.1 34.71 15 37 2.21 336 541 9.33 NM <1 <1 <1 <50 <1 6.9 0.089 NA <5 1.45 739 <1 52 <5 1.2 <1 4 7 0.25 <0.2 <25 0.763 CB-9 07/05/2016 5.0 36.47 17 36 2.38 348 553 9.75 NM <1 <1 <1 <50 <1 7.1 0.085 NA <5 1.14 294 <1 40 <5 1.2 <1 3.94 7 0.11 <0.2 <25 0.501 CB-9 DUP 07/05/2016 5.0 36.47 17 36 2.38 348 553 9.75 NM <1 <1 <1 <50 <1 NA NA NA 1 1.16 345 <1 44 1.86 NA <1 NA 8 NA <0.2 NA 0.55 CB-9SL 04/27/2015 6.0 36.05 13 76 1.08 130 335 30.4 <0.5 <1 <1 <1 <50 <1 6.1 NA NA 2.86 1.21 475 <1 125 2.13 NA <1 8.54 40 0.74 <0.2 92 0.56 CB-9SL 05/28/2015 5.8 35.98 19 59 1.59 84 289 5.97 <0.5 <1 <1 <1 <50 <1 6.6 NA NA <1 <1 73 <1 71 <1 NA <1 4.15 28 0.57 <0.2 43 <0.3 CB-9SL 09/08/2015 5.8 36.51 16 59 2.61 165 370 3 NM NA NA NA NA NA NA NA 0.111 NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9SL 12/08/2015 6.0 35.99 14 56 2.11 198 403 6.44 0 <0.5 <0.5 L3 0.29 <50 <0.08 6.2 0.2 NA 1.3 <0.5 320 0.19 12 0.77 NA <0.5 <5 28 <1 <0.1 93 <1 CB-9SL 01/21/2016 5.8 34.50 9 54 2 225 430 7.1 0 <1 <1 <1 <50 <1 6.5 0.2 NA <1 <1 95 <1 15 <1 NA <1 3 30 0.24 <0.2 41 <0.3 CB-9SL 04/13/2016 5.6 34.05 15 56 1.63 97 302 1.05 NM <1 <1 <1 <50 <1 6.3 0.25 NA <1 <1 23 <1 6 <1 NA <1 3.25 24 0.25 <0.2 54 <0.3 CB-9SL 07/11/2016 5.7 35.64 17 55 1.5 129 334 9.3 NM <1 <1 <1 <50 <1 6.3 0.23 NA 19.3 <1 158 4.89 13 12.4 NA <1 3.27 27 0.72 <0.2 43 0.392 MW-24S 05/11/2015 5.0 11.26 17 75 5.48 72 277 1.77 NM <1 <1 <1 <50 <1 12 NA NA <1 2.05 304 <1 170 1.16 NA <1 3.48 37 0.49 <0.2 54 <0.3 MW-24S 06/01/2015 5.2 11.19 15 79 4.67 97 302 2.74 <0.5 <1 <1 <1 <50 <1 13 NA NA <1 1.02 60 <1 136 1.07 NA <1 3.25 36 0.62 <0.2 66 <0.3 MW-24S 09/02/2015 5.2 11.34 18 78 5.03 193 398 0.96 NM NA NA NA NA NA NA NA 0.152 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-24S 12/08/2015 5.2 10.95 14 77 4.81 154 359 0.25 0 <0.5 <0.5 L3 0.23 <50 <0.08 13 0.3 M1 NA <0.5 0.78 <50 <0.1 120 0.75 NA <0.5 <5 35 <1 <0.1 72 <1 MW-24S 01/19/2016 5.3 10.98 12 79 5.12 148 353 0.8 0 <1 <1 <1 <50 <1 14 0.31 NA <1 1.06 <10 <1 150 1.02 NA <1 3.31 37 0.66 <0.2 36 <0.3 MW-24S 04/12/2016 5.2 11.30 14 81 4.66 205 410 0.75 NM <1 <1 <1 232 <1 14 0.26 NA <1 <1 235 B2 <1 359 1.04 NA <1 3.38 228 0.74 <0.2 63 <0.3 MW-24S DUP 04/12/2016 5.2 11.30 14 81 4.66 205 410 0.75 NM <1 <1 <1 <50 <1 15 0.26 NA <1 <1 16 B2 <1 153 1.05 NA <1 3.34 40 0.78 <0.2 57 <0.3 MW-24S 07/08/2016 4.3 10.81 17 80 6.21 S 325 530 1.22 NM <1 <1 <1 <50 <1 14 0.26 NA <1 <1 <10 <1 136 <1 NA <1 3.35 40 0.62 <0.2 52 <0.3 ABMW-2S 03/17/2015 4.2 25.53 17 813 0.41 99 304 2.39 1 <1 11.2 11 760 2.96 12 NA NA 1.47 569 1120 <1 17500 233 NA 10.7 19.3 258 610 0.369 640 <0.3 Reporting Units Analytical Parameter Background Saprolite Analytical ResultsField Parameters 15A NCAC 02L Standard P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-3 Saprolite GW Exceedances Page 1 of 4 TABLE 1-3 SAPROLITE GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Lead Manganese Nickel Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 4*700 2 250 0.07^0.07^10 1*300 15 50 100 10 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date Reporting Units Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard ABMW-2S 05/27/2015 4.1 26.05 19 832 0.26 122 327 9.33 <0.5 <1 16 12.5 751 3.3 14 NA 0.054 <1 578 557 <1 16200 247 NA 10.8 15.7 259 730 0.333 670 0.666 ABMW-2S DUP 05/27/2015 4.1 26.05 19 832 0.26 122 327 9.33 <0.5 <1 16 12.6 761 3.24 14 NA NA <1 576 453 <1 16500 245 NA 10.3 15.7 262 720 0.329 660 0.421 ABMW-2S 09/01/2015 3.9 26.90 17 746 1.5 235 440 1.2 NM NA NA NA NA NA NA NA 0.047 B NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-2S 12/09/2015 4.2 25.07 17 773 0.36 240 445 1.17 0 <0.5 18.9 11.6 730 2.9 13.7 <0.03 NA <0.5 417 <100 0.11 9600 168 NA 14.5 <25 220 397 M6 0.24 611 <1 ABMW-2S 01/21/2016 4.1 24.38 16 866 0.22 165 370 0.43 0 <1 23.5 12.4 851 3.48 16 <0.06 NA <1 589 27 <1 18400 286 NA 2.48 16.2 340 630 0.258 710 0.364 ABMW-5S 04/13/2015 5.9 16.44 14 211 3.53 51 256 2.62 <0.5 <1 <1 <1 <50 <1 7.8 NA NA <1 14.3 207 <1 395 2.28 NA <1 7.16 87 17 <0.2 130 <0.3 ABMW-5S 05/26/2015 5.8 18.30 20 222 0.42 -36 169 25.7 3 <1 <1 <1 <50 <1 5.2 NA 0.017 <1 16.7 4800 <1 537 3.37 NA <1 6.34 83 20 0.309 130 <0.3 ABMW-5S 09/01/2015 5.7 19.66 21 221 4.8 120 325 2.6 NM NA NA NA NA NA NA NA <0.006 NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-7S 04/12/2015 6.5 24.47 18 355 3.73 117 322 6.47 <0.5 <1 <1 <1 596 <1 6.3 NA NA 1.24 6.12 216 <1 798 <1 NA 3.65 13.9 333 82 0.311 190 0.76 ABMW-7S 05/27/2015 6.3 25.86 21 423 0.5 -35 170 1.96 <0.5 <1 <1 <1 789 <1 7.3 NA 0.232 <1 3.5 170 <1 763 <1 NA 1.65 11.6 442 120 0.664 200 <0.3 ABMW-7S 09/03/2015 6.3 28.71 19 420 0.8 122 327 4.1 NM NA NA NA NA NA NA NA 0.026 j NA NA NA NA NA NA NA NA NA NA NA NA NA NA APD-1 02/18/2014 5.7 5.41 8 653 0.91 271 NM 5.8 NM <1 1.35 NA 949 <1 48 NA NA <5 8.03 1770 <1 4720 <5 NA <1 NA NA 290 <0.2 580 NA APD-7 02/17/2014 5.3 25.10 12 214 0.61 219 NM 19.1 NM <1 <1 NA 132 <1 20 NA NA <5 <1 739 <1 38 <5 NA 16.4 NA NA 25 <0.2 110 NA APD-7 05/13/2015 5.5 25.60 21 169 1.2 66 271 4.76 <0.5 <1 <1 <1 119 <1 10 NA NA <1 <1 38 <1 12 <1 NA 19 4.07 47 27 <0.2 96 <0.3 CB-2 11/17/2010 5.3 19.13 13 212 NM NM NM 9.29 NM <0.5 <5 NA 241 <0.08 8.5 NA NA <5 NA 705 <5 2570 <5 0.11 <10 NA NA 92.9 0.18 158 NA CB-2 04/12/2011 5.3 17.31 14 244 0.4 -61 144 6.35 NM <0.5 <5 NA 229 <0.08 6.9 NA NA <5 NA 292 <5 2630 <5 <0.1 <10 NA NA 93.8 0.16 113 NA CB-2 07/15/2011 5.3 18.89 16 260 0.56 47 252 1.4 NM <0.5 <5 NA 245 <0.08 6.9 B NA NA <5 NA <50 <5 2580 <5 <0.2 <10 NA NA 80.6 0.18 133 B NA CB-2 11/09/2011 5.5 19.79 13 278 0.74 -93 112 1.81 NM <0.5 <5 NA 239 <0.08 8.7 NA NA <5 NA 197 <5 2690 <5 <0.2 <10 NA NA 95.8 0.18 262 NA CB-2 04/10/2012 5.2 18.64 15 253 0.44 -60 145 7.53 NM <0.5 <5 NA 219 <0.08 19.7 NA NA <5 NA <50 <5 2560 <5 <0.2 <10 NA NA 69.4 0.17 161 NA CB-2 DUP 04/10/2012 5.2 18.64 15 253 0.44 -60 145 7.53 NM <0.5 <5 NA 219 <0.08 11.4 NA NA <5 NA 54.5 <5 2540 <5 <0.2 <10 NA NA 74.6 0.17 162 NA CB-2 07/16/2012 5.3 19.98 19 279 0.98 382 587 2.31 NM <0.5 <5 NA 226 0.12 10.1 NA NA <5 NA 109 <5 2660 <5 <0.02 <10 NA NA 89.7 0.2 154 NA CB-2 11/15/2012 5.3 20.58 13 277 0.61 271 476 5.44 NM <0.5 <5 NA 230 0.098 10.5 NA NA <5 NA 146 <5 2580 <5 0.029 B <10 NA NA 83.6 0.21 153 NA CB-2 04/03/2013 5.3 18.32 14 263 0.82 93 298 2.54 NM <1 <1 NA 227 <1 9.3 NA NA <5 NA 34 <1 2890 <5 0.05 1.17 NA NA 86 <0.2 160 NA CB-2 07/01/2013 6.4 18.42 15 280 0.54 -103 102 1.37 NM <1 <1 NA 223 <1 8.8 NA NA <5 NA 243 <1 2900 <5 0.32 1.58 NA NA 79 <0.2 160 NA CB-2 DUP 07/01/2013 6.4 18.42 15 280 0.54 -103 102 1.37 NM <1 <1 NA 222 <1 8.7 NA NA <5 NA 175 <1 2910 <5 0.32 1.45 NA NA 79 <0.2 150 NA CB-2 11/06/2013 5.1 22.04 14 277 0.4 564 769 7.2 NM <1 <1 NA 307 <1 8.1 NA NA <5 NA 214 <1 3030 <5 <0.023 3.92 NA NA 91 <0.2 160 NA CB-2 04/16/2014 5.2 21.77 12 204 0.4 450 655 2.4 NM <1 <1 NA 257 <1 4.3 NA NA <5 NA 169 <1 2950 <5 0.92 <1 NA NA 68 <0.2 120 NA CB-2 07/09/2014 5.2 22.44 15 189 0.68 322 527 8 NM <1 <1 NA 240 <1 3.6 NA NA <5 NA 335 <1 3030 <5 1.4 <1 NA NA 59 <0.2 120 NA CB-2 11/03/2014 5.2 23.45 13 184 0.4 298 503 4.09 NM <1 <1 NA 209 <1 3.1 NA NA <5 NA 70 <1 2920 <5 1.7 <1 NA NA 50 <0.2 92 NA CB-2 04/07/2015 5.4 23.55 15 159 0.61 119 324 8.73 NM <1 <1 <1 174 <1 2.9 NA NA <5 4.26 319 <1 3030 <5 2.2 <1 9.94 NA 38 <0.2 100 NA CB-2 07/07/2015 5.3 24.00 18 148 0.83 115 320 4.43 NM <1 <1 <1 155 <1 2.7 NA NA <5 4.17 146 <1 3000 <5 9.8 <1 10 13 35 <0.2 93 <0.3 CB-2 11/03/2015 5.3 24.39 15 157 1.3 22 227 3.5 NM <1 <1 <1 198 <1 2.9 NA NA <5 5.7 97 <1 2750 <5 10 <1 10.8 19 38 0.483 81 <0.3 CB-4 11/18/2010 NM 17.58 13 217 NM NM NM 0.22 NM <0.5 <5 NA 404 <0.08 11.6 NA NA <5 NA <50 <5 368 <5 1.9 10.5 NA NA 96.9 <0.1 163 NA CB-4 04/12/2011 5.1 16.48 14 259 2.92 -79 126 3.74 NM <0.5 <5 NA 344 <0.08 10.2 NA NA <5 NA 90.5 <5 381 <5 1.8 <10 NA NA 85 <0.1 111 NA CB-4 07/14/2011 5.0 17.52 16 267 2.92 -29 176 0.65 NM <0.5 <5 NA 356 <0.08 9.8 B NA NA <5 NA <50 <5 411 <5 1.7 10.7 NA NA 84.1 <0.1 146 B NA CB-4 11/08/2011 5.1 17.60 15 291 2.14 -54 151 6.83 NM <0.5 <5 NA 415 <0.08 10.6 NA NA <5 NA 50.7 <5 465 <5 1.7 <10 NA NA 66.5 <0.1 180 NA CB-4 DUP 11/08/2011 5.1 17.60 15 291 2.14 -54 151 6.83 NM <0.5 <5 NA 419 <0.08 11.9 NA NA <5 NA 82.2 <5 469 <5 1.7 <10 NA NA 65.6 <0.1 293 NA CB-4 04/10/2012 5.1 16.80 14 261 2.32 -49 156 1.62 NM <0.5 <5 NA 324 0.085 11.7 NA NA <5 NA <50 <5 414 <5 1.8 <10 NA NA 73.4 <0.1 175 NA CB-4 07/16/2012 5.1 17.56 17 284 2.44 184 389 1.54 NM <0.5 <5 NA 371 <0.08 12.4 NA NA <5 NA 72.7 <5 475 <5 1.5 10.4 NA NA 94.5 <0.1 176 NA CB-4 11/15/2012 5.2 17.40 15 308 2.32 263 468 0.36 NM <0.5 <5 NA 391 0.12 12.4 NA NA <5 NA <50 <5 483 <5 1.5 <10 NA NA 91.9 <0.1 180 NA CB-4 04/03/2013 5.0 16.37 13 265 3.45 108 313 3.93 NM <1 <1 NA 322 <1 9 NA NA <5 NA 34 <1 464 <5 1.3 10 NA NA 97 <0.2 180 NA CB-4 07/01/2013 5.1 16.44 16 243 4.2 17 222 0.78 NM <1 <1 NA 288 <1 6.7 NA NA <5 NA 17 <1 393 <5 1.1 8.93 NA NA 75 <0.2 150 NA CB-4 11/06/2013 5.0 18.19 15 307 2.7 377 582 5.4 NM <1 <1 NA 525 <1 9.5 NA NA <5 NA 97 <1 591 <5 1.3 12.4 NA NA 120 <0.2 200 NA CB-4 04/16/2014 5.2 17.69 13 322 2.9 241 446 1.2 NM <1 <1 NA 527 <1 8.9 NA NA <5 NA 39 <1 597 <5 1.9 10.4 NA NA 130 <0.2 210 NA CB-4 DUP 04/16/2014 5.2 17.69 13 322 2.9 241 446 1.2 NM <1 <1 NA 519 <1 6.9 NA NA <5 NA 33 <1 593 <5 0.33 10.3 NA NA 130 <0.2 220 NA CB-4 07/09/2014 5.1 18.70 17 331 3.93 407 612 4.2 NM <1 <1 NA 567 <1 8.6 NA NA <5 NA 209 <1 677 <5 2.3 9.69 NA NA 130 <0.2 230 NA CB-4 11/03/2014 5.1 19.70 15 366 3.77 434 639 9.59 NM <1 <1 NA 653 <1 9 NA NA <5 NA 241 <1 809 <5 2.8 8.43 NA NA 130 <0.2 230 NA CB-4 04/08/2015 5.1 19.00 13 340 4.52 112 317 6.73 NM <1 <1 <1 590 <1 7.5 NA NA <5 1.63 291 <1 747 <5 2.8 8 18.1 NA 140 <0.2 240 NA CB-4 07/08/2015 5.2 20.38 18 335 3.12 206 357 18 NM <1 <1 <1 598 <1 7.6 NA NA <5 5.41 3340 1.57 920 <5 16 7.58 17.7 213 130 <0.2 230 4.68 CB-4 11/04/2015 5.2 20.30 16 359 2.23 0 205 8.15 NM <1 <1 <1 683 <1 8.9 NA NA <5 2.47 226 <1 975 <5 8.9 6.23 18.5 B2 243 140 <0.2 220 0.446 CB-4 12/09/2015 5.1 18.59 14 291 5.8 262 467 10.1 0 <0.5 <0.5 <0.2 540 <0.08 4.5 0.23 NA 0.55 B 1.7 210 0.22 570 1.4 NA 8.8 17.4 190 115 <0.1 198 <1 CB-4 01/19/2016 5.3 16.89 9 212 5.97 164 369 2.83 0 <1 <1 <1 378 <1 2.2 <0.03 NA <1 1.05 10 <1 382 <1 NA 7.36 14.9 136 100 <0.2 120 <0.3 CB-4 04/05/2016 5.2 18.31 13 213 8.52 329 534 2.41 NM <1 <1 <1 350 <1 2 NA NA <5 <1 111 <1 408 <5 1 5.57 15.1 138 93 <0.2 140 <0.3 CB-4 DUP 04/05/2016 5.2 18.31 13 213 8.52 329 534 2.41 NM <1 <1 <1 348 <1 2 NA NA <5 <1 117 <1 406 <5 1.1 5.24 15.2 137 96 <0.2 140 <0.3 CB-4 07/05/2016 5.2 21.42 26 241 3.33 383 588 4.5 NM <1 <1 <1 400 <1 5.2 NA NA <5 1.64 28 <1 722 <5 16 4.65 14.7 178 92 <0.2 150 <0.3 DP-1 02/17/2014 6.9 11.62 11 1229 0.17 -107 NM 48.1 NM <1 1220 NA 1140 <1 8.2 NA NA <5 41.8 10100 <1 2430 9 NA <1 NA NA 160 0.73 730 NA DP-1 05/13/2015 7.1 11.94 21 550 0.74 50 255 39.6 2.25 <1 1180 <1 378 <1 2.3 NA NA <1 20.7 8770 <1 1570 3.64 NA <1 6.22 1810 96 <0.2 370 3.12 GW-1 12/14/2007 4.5 20.39 14 98 NM NM NM NM NM <5 6.3 NA <10 <1 8.2 NA NA 35.7 NA 56800 29.4 NA 34.1 6.3 <10 NA NA <5 0.12 50 NA GW-1 04/21/2008 3.8 19.78 14 98 NM NM NM NM NM <5 <5 NA <10 <1 <5 NA NA <5 NA 2880 <5 189 8.7 8.2 <10 NA NA <5 <0.5 40 NA P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-3 Saprolite GW Exceedances Page 2 of 4 TABLE 1-3 SAPROLITE GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Lead Manganese Nickel Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 4*700 2 250 0.07^0.07^10 1*300 15 50 100 10 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date Reporting Units Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard GW-1 10/13/2008 4.4 19.95 13 72 NM NM NM NM NM <5 <5 NA <50 <1 <5 NA NA <5 NA 122 <5 74.8 5 5.2 <10 NA NA <5 <0.1 54 NA GW-1 04/14/2009 4.3 19.70 14 89 NM NM NM NM NM <5 <5 NA <50 <1 <5 NA NA <5 NA 575 <5 98.5 7.5 7.7 <10 NA NA <5 <0.5 70 NA GW-1 10/16/2009 4.5 19.82 14 102 NM NM NM NM NM <5 <5 NA <50 <1 <5 NA NA <5 NA 232 <5 100 6.5 8.2 <10 NA NA <5 <0.5 74 NA GW-1 05/11/2010 3.1 19.63 13 106 NM NM NM NM NM <5 <5 NA <50 <1 <5 NA NA <5 NA 459 <5 90.3 5 8.6 <10 NA NA <5 <0.1 26 NA GW-1 11/17/2010 4.5 20.16 11 69 NM NM NM 6.32 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 63.6 <5 81 <5 7.7 <10 NA NA <5 <0.1 46 NA GW-1 04/12/2011 4.3 19.33 13 112 5.06 49 254 7.46 NM <0.5 <5 NA <50 <5 <5 NA NA <5 NA 248 <5 138 7.1 10.9 <10 NA NA <5 <0.1 44 NA GW-1 07/14/2011 4.3 19.88 16 87 5.01 -84 121 2.77 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 79.6 <5 134 7 B 7.5 <10 NA NA <5 <0.1 <25 NA GW-1 11/09/2011 4.6 20.54 14 96 4.36 -82 123 2.28 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 102 <5 205 5.9 7.9 <10 NA NA <5 <0.1 86 NA GW-1 04/10/2012 4.6 20.03 16 104 3.95 -67 138 3.07 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 96 <5 341 5.9 8 <10 NA NA <5 <0.1 64 NA GW-1 07/16/2012 4.4 19.92 16 93 2.92 297 502 7.98 NM <0.5 <5 NA 65.1 0.082 4.7 NA NA <5 NA 147 <5 310 <5 7.1 <10 NA NA <2 <0.1 57 NA GW-1 11/15/2012 4.6 20.69 15 96 2.26 348 553 5.76 NM <0.5 <5 NA <50 0.1 4.9 NA NA <5 NA 480 <5 293 <5 6 <10 NA NA 3.1 <0.1 37 NA GW-1 04/03/2013 4.5 20.68 15 93 2.48 137 342 2.57 NM <1 <1 NA <50 <1 5.4 NA NA <5 NA 31 <1 442 <5 5.9 2.04 NA NA 1.9 <0.2 69 NA GW-1 07/01/2013 4.8 20.47 17 125 3.42 12 217 2.17 NM <1 <1 NA <50 <1 6.2 NA NA <5 NA 49 <1 612 6 7.1 3.32 NA NA 3.2 <0.2 80 NA GW-1 11/05/2013 4.5 20.94 14 148 2.3 436 641 3.1 NM <1 <1 NA <50 <1 7 NA NA <5 NA 89 <1 737 5 7.8 4.9 NA NA 15 <0.2 87 NA GW-1 04/17/2014 4.6 20.55 15 138 1.6 290 495 8 NM <1 1.25 NA <50 <1 6 NA NA <5 NA 275 <1 692 <5 6.4 1.47 NA NA 17 <0.2 75 NA GW-1 07/10/2014 4.4 20.14 17 154 1.5 364 569 1.9 NM <1 1.61 NA <50 <1 7.1 NA NA <5 NA 84 <1 683 <5 6.2 1.53 NA NA 24 <0.2 85 NA GW-1 11/04/2014 4.7 20.95 17 155 0.98 337 542 8.62 NM <1 <1 NA <50 <1 6.7 NA NA <5 NA 568 <1 534 <5 4.1 1.56 NA NA 27 <0.2 75 NA GW-1 04/07/2015 4.8 20.81 15 123 0.89 121 326 0.67 NM <1 <1 <1 <50 <1 6.6 NA NA <5 4.71 15 <1 507 <5 3.2 1.6 1.09 NA 25 <0.2 83 NA GW-1 07/06/2015 4.8 20.58 19 137 1.1 263 468 4.99 NM <1 <1 <1 <50 <1 6.6 NA NA <5 4.76 101 <1 551 <5 13 1.78 1.05 <5 35 <0.2 78 <0.3 GW-1 11/02/2015 5.2 20.55 17 115 1.4 541 746 0.8 NM <1 <1 <1 <50 <1 6.6 NA NA <5 3.79 26 <1 397 <5 7.4 1.33 1.41 <5 27 0.21 67 <0.3 GW-1 12/09/2015 4.8 20.09 16 127 1.1 355 560 4.64 0 <0.5 0.94 0.23 <50 <0.08 6.7 1 NA 1.2 5.6 <50 0.16 460 3.2 NA 1.7 <5 <5 24.5 <0.1 84 <1 L3 GW-1 01/18/2016 4.8 20.19 15 161 1.8 397 602 8.02 0 <1 <1 <1 <50 <1 5.5 0.87 NA 1.2 6.13 104 <1 725 3.4 NA 1.53 1.13 <5 29 <0.2 82 <0.3 GW-1 04/05/2016 4.8 20.65 14 220 1.51 360 565 2.43 NM <1 1.26 <1 <50 <1 7.9 NA NA <5 6.92 141 <1 1070 <5 32 2.32 1.13 <5 52 <0.2 120 <0.3 GW-1 07/06/2016 4.8 20.46 22 180 0.55 366 571 2.78 NM <1 <1 <1 <50 <1 6.9 NA NA <5 5.06 29 <1 668 <5 15 B2 2.17 1.32 <5 50 <0.2 120 <0.3 GW-1 DUP 07/06/2016 4.8 20.46 22 180 0.55 366 571 2.78 NM <1 <1 <1 <50 <1 6.9 NA NA <5 4.98 33 <1 657 <5 15 B2 2.17 1.29 <5 58 <0.2 110 <0.3 GW-3 12/14/2007 5.7 12.76 16 498 NM NM NM NM NM <5 <5 <1 1120 <1 12.1 NA NA <5 NA 337 <5 NA <5 <0.1 <10 NA NA 150 0.10 320 NA GW-3 04/21/2008 6.4 12.15 14 463 NM NM NM NM NM <5 <5 <1 1300 <1 14.2 NA NA <5 NA 889 <5 1370 <5 <0.1 <10 NA NA 127 <0.1 300 NA GW-3 10/13/2008 5.7 12.69 16 504 NM NM NM NM NM <5 <5 <1 1290 <1 21.2 NA NA <5 NA 86.1 <5 1850 <5 <0.1 <10 NA NA 148 <0.1 370 NA GW-3 04/14/2009 5.7 11.93 14 500 NM NM NM NM NM <5 <5 <1 1320 <1 24.7 NA NA <5 NA 122 <5 1120 <5 <0.1 <10 NA NA 142 <0.5 218 NA GW-3 10/16/2009 5.7 11.88 16 470 NM NM NM NM NM <5 <5 <1 1190 <1 26.8 NA NA <5 NA 261 <5 736 <5 0.25 <10 NA NA 156 <0.5 328 NA GW-3 05/11/2010 5.7 11.50 14 481 NM NM NM NM NM <5 <5 <1 1240 <1 34.2 NA NA <5 NA 3470 <5 1770 <5 <0.1 <10 NA NA 143 <0.1 290 NA GW-3 02/18/2014 5.7 12.40 11 678 2.03 341 NM 9.5 NM <1 <1 NA 1400 <1 51 NA NA <5 18.3 1100 <1 385 <5 NA 1.59 NA NA 210 <0.2 470 NA GW-3 05/14/2015 5.6 12.99 17 476 2.72 78 283 6.98 <0.5 <1 <1 <1 1170 <1 39 NA NA <1 17.2 485 <1 555 <1 NA 2.84 12.5 679 170 <0.2 440 0.301 GW-3 12/09/2015 5.7 11.92 15 295 2 279 484 9.3 0 <0.5 <0.5 <0.2 760 <0.08 14.7 0.16 NA <0.5 3.9 310 0.17 150 0.57 NA 3.8 17.8 420 83.9 <0.1 221 <1 L1 GW-3 01/21/2016 5.7 11.77 12 221 0.37 119 324 3.37 1 <1 <1 <1 477 <1 17 <0.03 NA <1 51.5 955 <1 3200 2.41 NA 1.17 12.7 316 50 <0.2 200 <0.3 GW-3 04/25/2016 5.8 13.00 16 880 1.26 304 509 1.96 NM <1 <1 <1 1840 <1 89 NA NA <1 1.66 NA <1 NA NA NA <1 NA NA 310 <0.2 670 NA MW-6S 04/15/2015 5.5 1.55 14 332 0.33 115 320 9.52 <0.5 <1 <1 <1 1090 <1 12 NA NA <1 15.6 645 <1 10000 1.9 NA <1 14.1 147 120 <0.2 220 0.543 MW-6S 05/21/2015 5.3 4.51 16 343 0.45 51 256 3.94 <0.5 <1 <1 <1 1050 <1 12 NA NA <1 6.17 225 <1 9970 <1 NA <1 14.6 141 130 <0.2 220 <0.3 MW-8S 03/06/2015 6.0 7.69 11 2013 0.79 41 246 4.25 <0.5 <1 <1 <1 5030 <1 450 NA NA <1 7.73 162 <1 2850 2.47 NA 1.17 18.8 4410 260 <0.2 1500 0.342 MW-8S 05/27/2015 5.9 6.93 23 1949 0.95 108 313 8.15 <0.5 <1 <1 <1 5330 <1 450 NA 0.045 <1 3.09 17 <1 2830 1.65 NA 1.41 15 4160 290 <0.2 1900 <0.3 MW-8S 09/01/2015 6.2 7.34 25 1897 1.18 169 374 1.02 NM NA NA NA NA NA NA NA 0.026 B NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-8S 12/09/2015 6.0 6.27 17 1810 0.8 272 477 2.31 0 <0.5 0.74 <0.2 5600 <0.08 398 0.035 NA <0.5 2.8 <50 <0.1 2600 1.5 NA 1.2 14.4 3700 243 <0.1 1280 <1 L3 MW-8S 01/20/2016 6.1 5.86 11 1851 0.4 197 402 0.5 0 <1 <1 <1 6140 <1 420 <0.03 NA <1 2.75 15 <1 2920 1.56 NA 1.13 14.3 3540 260 <0.2 1300 <0.3 MW-9S 04/27/2015 5.5 28.52 19 2252 2.04 132 337 4.16 <0.5 <1 <1 <1 4730 <1 560 NA NA <1 15.8 70 <1 4290 5.24 NA 36.6 18.1 3080 250 0.294 1700 <0.3 MW-9S 05/21/2015 5.5 28.56 20 2291 1.19 37 242 5.59 <0.5 <1 <1 <1 4800 <1 570 NA NA <1 5.9 211 <1 3630 3.92 NA 40.6 17.5 2950 270 <0.2 1700 <0.3 MW-9S 12/09/2015 5.2 28.20 12 2182 1.3 429 634 3.32 0 <0.5 <0.5 <0.2 5400 0.18 <1 0.37 NA 0.64 4 <50 <0.1 3400 3.2 NA 39.7 17.2 3000 290 0.19 1410 <1 L1 MW-9S 01/20/2016 5.7 27.69 7 2135 1.4 362 567 1 NM <1 <1 <1 5560 <1 530 0.5 NA 16.1 3.64 78 <1 3410 9.71 NA 34 17 2600 290 <0.2 1500 <0.3 P-100 05/19/2015 5.4 75.12 22 359 0.22 -124 81 9.01 <0.5 <1 <1 <1 732 <1 12 NA NA 12.7 35.9 545 <1 3380 13.6 NA <1 17.2 18 140 <0.2 230 0.457 P-101 05/19/2015 5.7 86.39 22 418 0.24 -6 199 2.53 <0.5 <1 <1 <1 1200 <1 12 NA NA 2.34 14.3 155 <1 2320 4.18 NA <1 14.3 362 160 <0.2 260 <0.3 P-103 05/20/2015 5.6 48.53 20 209 0.19 -80 125 8.91 0.5 <1 <1 <1 420 <1 11 NA NA 6.07 20 724 <1 7410 10.1 NA <1 5.8 25 50 <0.2 120 0.488 P-104 05/19/2015 5.7 44.84 21 222 0.87 -21 184 13.3 <0.5 <1 <1 <1 194 <1 7.1 NA NA 1.64 26.8 737 <1 1150 3.56 NA 1.37 6.04 88 41 <0.2 140 0.559 P-105 05/13/2015 5.0 44.78 20 70 3.56 74 279 8.09 NM <1 <1 <1 <50 <1 9 NA NA 2.5 3.97 422 <1 120 5.01 NA <1 2.58 26 3.1 <0.2 44 0.584 PZ-1S 12/14/2006 6.6 11.70 16 1 NM NM NM NM NM 4.8 <2 <0.7 345 <0.5 7.2 NA NA <2 NA 987 <2 463 2.8 0.37 <2 76.2 NA 180 <4 397 NA PZ-8 12/14/2006 5.8 49.49 14 1 NM NM NM NM NM <2 476 <0.7 1200 <0.5 7.5 NA NA <2 NA 22500 <2 2720 <2 0.54 <2 5.2 NA 40 <4 310 NA PZ-12 12/14/2006 7.1 12.54 14 0 NM NM NM NM NM <2 2 <0.7 574 <0.5 6.7 NA NA <2 NA 233 <2 7880 2.5 0.41 <2 23 NA 110 <4 222 NA PZ-19 12/14/2006 5.7 17.63 14 0 NM NM NM NM NM 10.4 5.2 <0.7 623 0.7 6.1 NA NA 9.3 NA 595 <2 76.2 8.7 0.99 <2 21.4 NA 94 5.8 191 NA PZ-19 06/12/2007 7.3 17.66 16 329 NM NM NM NM NM <0.1 0.42 0.88 478 0.23 7.16 NA NA 82.2 NA 18700 0.7 179 59.5 1.52 2.9 NA NA 104 0.43 214 NA PZ-19 12/13/2007 5.6 17.74 22 373 NM NM NM NM NM <5 <5 <1 483 <1 12.3 NA NA 81.7 NA 7210 <5 NA 55.5 0.95 <10 NA NA 112 0.22 272 NA PZ-19 04/21/2008 6.5 17.71 19 357 NM NM NM NM NM <5 <5 <1 558 <1 11.3 NA NA 8.5 NA 572 <5 81.6 5.7 0.97 <10 NA NA 113 0.16 230 NA PZ-19 10/13/2008 5.8 17.34 17 373 NM NM NM NM NM <5 <5 <1 498 <1 13.3 NA NA 6.3 NA 558 <5 23.8 <5 1.4 <10 NA NA 122 0.13 262 NA P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-3 Saprolite GW Exceedances Page 3 of 4 TABLE 1-3 SAPROLITE GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Lead Manganese Nickel Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 4*700 2 250 0.07^0.07^10 1*300 15 50 100 10 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date Reporting Units Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard PZ-19 05/11/2010 5.9 17.63 16 323 NM NM NM NM NM <5 <5 <1 547 <1 12.2 NA NA 15.8 NA 1590 <5 38.6 8.8 1.3 <10 NA NA 121 0.16 160 NA PZ-19 02/19/2014 5.9 21.77 14 488 0.5 301 NM 2.3 NM <1 <1 NA 1000 <1 12 NA NA <5 <1 151 <1 238 <5 NA <1 NA NA 170 0.2 310 NA PZ-19 05/20/2015 5.7 24.34 22 450 2.48 117 322 9.77 <0.5 2.16 <1 <1 969 <1 9.8 NA NA 4.34 <1 471 <1 272 5.63 NA <1 16.9 565 170 0.252 NA 0.99 PZ-22 12/14/2006 5.5 1.30 10 0 NM NM NM NM NM 3.3 <2 <0.7 706 0.5 6 NA NA <2 NA 351 <2 1570 2.1 0.52 <2 19.6 NA 100 <4 198 NA PZ-22 06/12/2007 7.4 1.58 16 318 NM NM NM NM NM <0.1 0.85 0.22 579 0.48 7.35 NA NA 9 NA 12700 5.4 1150 6.5 0.05 2.7 NA NA 105 0.32 217 NA PZ-22 12/13/2007 4.8 1.55 13 351 NM NM NM NM NM <5 <5 <1 578 <1 10.9 NA NA <5 NA 1390 <5 NA <5 0.19 <10 NA NA 106 0.11 214 NA PZ-22 04/21/2008 5.6 1.65 14 346 NM NM NM NM NM <5 <5 <1 756 <1 10.1 NA NA <5 NA 1110 <5 1840 <5 0.16 <10 NA NA 116 0.12 222 NA PZ-22 10/13/2008 5.3 1.56 15 358 NM NM NM NM NM <5 <5 <1 722 <1 12.3 NA NA <5 NA 750 <5 1830 <5 0.17 <10 NA NA 123 0.12 238 NA PZ-22 04/14/2009 5.3 1.42 13 320 NM NM NM NM NM <5 <5 <1 733 <1 11.9 NA NA <5 NA 1190 <5 2040 <5 0.12 <10 NA NA 118 <0.5 230 NA PZ-22 10/16/2009 5.5 1.48 16 345 NM NM NM NM NM <5 <5 <1 633 <1 13 NA NA <5 NA 1260 <5 1830 <5 0.23 <10 NA NA 115 <0.5 230 NA PZ-22 05/11/2010 5.5 1.47 14 306 NM NM NM NM NM <5 <5 <1 772 <1 12.7 NA NA <5 NA 1390 <5 1880 <5 0.14 <10 NA NA 107 <0.1 164 NA PZ-22 02/19/2014 5.7 1.55 9 441 0.1 109 NM 8.8 NM <1 <1 NA 798 <1 11 NA NA <5 9.13 4740 <1 2200 <5 NA <1 NA NA 170 <0.2 270 NA PZ-22 07/23/2014 5.2 2.29 19 417 0.43 255 NM 7.36 NM <1 <1 NA 1200 <1 10 NA NA <5 12 1430 <1 2400 <5 0.84 <1 16.8 NA 170 <0.2 280 NA PZ-22 05/18/2015 5.5 3.07 17 467 0.56 35 240 5.73 2 <1 <1 <1 1210 <1 8.3 NA NA <1 6.95 2300 <1 2230 1.29 NA <1 17.2 826 200 <0.2 290 <0.3 PZ-23 02/20/2014 5.4 19.98 14 298 0.4 482 NM 2.9 NM <1 2.58 NA 287 <1 8.8 NA NA <5 25.3 53 <1 3800 <5 NA <1 NA NA 91 0.22 160 NA PZ-23 05/18/2015 5.4 21.40 17 228 0.42 147 352 9.22 0 <1 <1 <1 226 <1 4.4 NA NA <1 22.4 358 <1 3640 1.43 NA <1 16.5 112 62 <0.2 120 0.389 PZ-24 02/20/2014 6.0 5.84 14 422 0.3 14 NM 7.5 NM <1 2.21 NA <50 <1 4.3 NA NA <5 2.67 45900 <1 1730 6 NA <1 NA NA 0.12 <0.2 210 NA PZ-24 05/19/2015 6.0 8.63 24 511 1.02 90 295 33.4 7 <1 1.11 <1 <50 <1 6.8 NA NA 4.49 4.35 69200 <1 2000 3.56 NA <1 5.24 202 <0.1 <0.2 260 4.25 PZ-26 02/20/2014 4.5 23.50 15 31 2.9 281 NM 8.2 NM <1 <1 NA <50 <1 1.9 NA NA <5 2.34 657 <1 40 <5 NA <1 NA NA <0.1 <0.2 <25 NA PZ-26 05/19/2015 4.8 27.08 20 42 1.94 101 306 9.44 <0.5 <1 <1 <1 <50 <1 2.8 NA NA <1 2.23 189 <1 34 <1 NA <1 2 9 0.13 <0.2 <25 <0.3 PZ-26 12/10/2015 5.0 26.50 12 41 1.7 223 428 8.88 0 <0.5 <0.5 0.35 <50 <0.08 3.7 0.093 NA <0.5 2.4 340 0.11 34 1 NA <0.5 <5 11 <1 <0.1 42 D6 <1 PZ-27 02/20/2014 7.5 32.80 16 1376 0.2 -109 NM 274 NM 10.6 1730 NA 2370 6.5 32 NA NA 30 11.5 12500 14.1 484 34 NA 3.54 NA NA 300 1.34 960 NA Still Pipe 02/18/2014 6.0 Artesian 14 1220 0.25 246 NM 0.61 NM <1 3.89 NA 1660 <1 85 NA NA <5 39.8 950 <1 10400 17 NA 1.75 NA NA 390 <0.2 870 NA Prepared by: BER Checked by: TDP Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. Deg C = Degrees Celsius mV = Millivolts mg/L = Milligram per liter ORP = Oxidation Reduction Potential DO = Dissolved oxygen DUP = Duplicate NA = Not analyzed ug/L = Microgram per liter umhos/cm = Micro mhos per centimeter NE = Not established S.U. = Standard Unit ft = Feet Temp = Temperature Spec Cond = Specific Conductance NM = Not measured Eh = Redox Potential NTU = Nephelometric turbidity unit ^ = NC DHHS Health Screening Level < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10x the concentration in the method blank. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for complicance purposes. D6 = The relative percent difference (RPD) between the sample and sample duplicate exceeded laboratory control limits. L1 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. M1 = Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. M6 = Matrix spike and matrix spike duplicate recovery not evaluated against control limits due to sample dilution. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-3 Saprolite GW Exceedances Page 4 of 4 TABLE 1-4 TRANSITION ZONE EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Nickel Nitrate (as N)Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg-N/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 250 0.07^0.07^10 1*300 50 100 10 10 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date CB-1D 04/28/2015 6.7 38.22 17 75 1.56 1 206 7.52 <0.5 <50 1.3 NA NA 7.04 2.54 528 226 6.03 0.036 NA <1 5.63 25 2.7 <0.2 44 0.416 CB-1D 05/21/2015 6.4 38.36 16 57 0.8 48 253 2.83 0.5 <50 1.1 NA NA 1.27 1.66 589 286 2.07 0.038 NA <1 3.89 19 2.2 <0.2 37 0.34 CB-1D 09/08/2015 5.8 38.92 16 30 2.87 122 327 2.36 NM NA NA NA 0.013 j NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1D 12/08/2015 6.4 39.34 15 39 1.5 -67 138 3.26 NM <50 1.2 <0.03 NA 2.4 2.6 610 180 3.7 0.11 NA <0.5 <5 19 3.2 <0.1 67 <1 CB-1D 01/20/2016 5.8 37.24 13 31 2.12 115 320 3.67 0 <50 0.83 <0.03 NA 1.83 2.34 269 151 2.72 0.093 NA <1 1.78 14 3.2 <0.2 <25 <0.3 CB-1D 04/13/2016 5.6 34.08 15 36 3.17 91 296 4.08 NM <50 0.91 <0.03 NA <1 3.08 231 93 4.97 0.165 NA <1 2.92 17 4.6 <0.2 38 <0.3 CB-1D 07/08/2016 5.1 36.70 20 30 6.53 S 213 418 9.65 NM <50 0.96 <0.03 NA <1 2.33 193 70 2.32 0.208 NA <1 2.48 14 2.1 <0.2 <25 <0.3 CB-1D DUP 07/08/2016 5.1 36.70 20 30 6.53 S 213 418 9.65 NM <50 7.5 <0.03 NA <1 2.03 163 68 1.85 0.206 NA <1 2.1 14 5.6 <0.2 <25 <0.3 ABMW-4D 03/31/2015 6.1 36.62 16 366 0.25 9 214 5.08 3 1050 12 NA NA <1 67.3 8370 6070 2.5 <0.01 NA <1 5.59 214 100 <0.2 240 0.789 ABMW-4D 05/26/2015 5.7 37.05 18 375 0.45 212 417 6.47 3.5 1080 12 NA 0.02 <1 54.2 6360 5820 2.25 0.016 NA <1 5.19 176 110 0.319 250 0.564 ABMW-4D DUP 05/26/2015 5.7 37.05 18 375 0.45 212 417 6.47 3.5 1080 13 NA NA <1 54.6 6290 5790 2.31 0.037 NA <1 5.26 179 110 0.291 240 0.451 ABMW-4D 09/08/2015 5.8 38.81 17 366 0.49 21 226 3.44 NM NA NA NA 0.021 j NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-4D 12/10/2015 5.6 37.51 15 365 0.2 16 221 9.31 3 1100 12.1 <0.03 NA 1.5 49.6 8200 5700 2.9 0.028 NA <0.5 5.41 180 109 0.21 214 <1 ABMW-4D DUP 12/10/2015 5.6 37.51 15 365 0.2 16 221 9.31 3 1100 12.2 <0.03 NA 1.7 49.3 7900 5600 3 0.021 NA <0.5 5.59 170 108 0.24 246 1.2 ABMW-4D 01/21/2016 5.7 35.45 15 356 0.18 47 252 8.21 2.5 1110 13 <0.03 NA 1.15 50.4 7630 5790 2.62 0.017 NA <1 5.23 181 120 <0.2 240 0.603 ABMW-5D 04/12/2015 6.2 17.07 14 291 0.49 96 301 5.57 3.5 108 9.8 NA NA <1 1.2 21100 517 1.14 <0.01 NA <1 10 114 15 <0.2 200 <0.3 ABMW-5D 05/26/2015 6.1 20.33 19 270 0.48 -96 109 9.39 4 106 11 NA 0.016 <1 <1 19000 369 <1 0.025 NA <1 8.01 108 16 <0.2 170 <0.3 ABMW-5D 09/01/2015 6.2 20.92 22 264 1 46 251 1.6 NM NA NA NA 0.008 B NA NA NA NA NA NA NA NA NA NA NA NA NA NA AMW-2A 07/24/2014 5.5 21.82 18 297 0.24 80 NM 2.95 NM 296 8.4 NA NA <5 19 8200 1790 <5 0.04 0.18 1.54 16.5 NA 87 <0.2 190 NA AMW-2A 05/19/2015 5.7 22.12 18 296 0.54 -34 171 9.4 <0.5 225 8.2 NA NA <1 21.2 16800 2950 1.35 0.04 NA <1 13.9 236 65 <0.2 190 <0.3 AMW-2A 12/09/2015 5.3 21.42 16 152 0.8 136 341 8.95 1.5 70 5.4 <0.03 NA <0.5 12.9 5400 1600 4.9 0.36 NA <0.5 9.77 82 40 0.11 113 <1 AMW-2A 01/19/2016 5.8 21.20 10 221 0.23 113 318 5.27 3.5 132 7.7 <0.03 NA <1 20.5 25700 3110 2.21 0.018 NA <1 9.34 174 51 <0.2 140 <0.3 CB-3 11/18/2010 NM 22.81 13 279 NM NM NM 0.71 NM 389 13.3 NA NA <5 NA 3490 159 <5 NA 0.36 <10 NA NA 114 0.31 187 NA CB-3 04/12/2011 5.7 22.30 16 344 0.14 -106 99 0.35 NM 356 12.8 NA NA <5 NA 1260 142 <5 NA 0.5 <10 NA NA 108 0.41 130 NA CB-3 07/14/2011 5.7 22.25 18 370 0.3 -25 180 0.55 NM 351 13.6 B NA NA <5 NA 879 146 <5 NA 0.43 <10 NA NA 114 0.4 165 B NA CB-3 11/09/2011 5.9 22.26 14 406 0.49 -121 84 1.5 NM 423 13.2 NA NA <5 NA 796 155 <5 NA <0.2 <10 NA NA 168 0.38 440 NA CB-3 04/10/2012 5.8 22.40 18 473 0.4 -53 152 1.36 NM 615 13.9 NA NA <5 NA 774 179 <5 NA 0.42 <10 NA NA 142 0.48 287 NA CB-3 07/16/2012 5.8 22.02 21 530 0.65 107 312 0.67 NM 895 13.9 NA NA <5 NA 384 178 <5 NA 0.21 <10 NA NA 194 0.45 293 NA CB-3 DUP 07/16/2012 5.8 22.02 21 530 0.65 107 312 0.67 NM 900 13.6 NA NA <5 NA 331 178 <5 NA 0.23 <10 NA NA 196 0.43 300 NA CB-3 05/19/2015 5.8 31.24 18 439 0.4 229 434 40.8 <0.5 947 8.8 NA NA <1 1.88 844 331 1.84 0.465 NA 3.03 13.1 584 150 0.398 240 0.675 CB-3R 11/14/2012 5.2 26.11 16 488 0.66 190 395 4.05 NM 1290 13 NA NA <5 NA 190 366 <5 NA 1 <10 NA NA 170 0.32 324 NA CB-3R 04/03/2013 5.4 26.14 17 415 0.58 87 292 7.8 NM 704 11 NA NA <5 NA 10100 231 <5 NA 0.4 2.15 NA NA 170 <0.2 300 NA CB-3R 07/01/2013 5.4 26.58 18 449 0.42 -61 144 0.77 NM 858 10 NA NA <5 NA 4060 296 <5 NA 0.71 4.41 NA NA 160 0.239 300 NA CB-3R 11/06/2013 5.5 30.05 16 391 0.4 98 303 3.2 NM 603 11 NA NA <5 NA 17700 188 <5 NA <0.023 <1 NA NA 160 <0.2 270 NA CB-3R 04/16/2014 5.3 30.96 18 416 0.1 317 522 3.9 NM 702 11 NA NA <5 NA 4060 512 <5 NA 4 1.81 NA NA 160 <0.2 290 NA CB-3R 07/09/2014 5.2 31.84 19 540 0.25 279 484 9.6 NM 805 11 NA NA <5 NA 766 1110 13 NA 21 2.69 NA NA 150 0.216 360 NA CB-3R 07/23/2014 4.9 31.92 20 594 0.29 296 NM 7.82 NM 805 11 NA NA <5 27 766 1160 0.013 21 92 2.69 NA NA 150 0.216 360 NA CB-3R 11/03/2014 5.5 33.00 19 489 0.17 185 390 11.2 NM 589 12 NA NA 13 NA 4570 593 33 NA 8.6 <1 NA NA 160 <0.2 300 NA CB-3R 04/08/2015 5.0 35.46 16 541 0.7 102 307 49.7 NM 571 11 NA NA 20 17.1 6240 510 49 NA 3.2 <1 18.6 NA 180 <0.2 310 NA CB-3R 07/08/2015 4.5 35.33 18 644 1.75 152 357 5.97 NM 720 10 NA NA <5 29.9 2980 754 52 23 110 1.78 17.7 733 180 0.257 420 2.7 CB-3R 11/04/2015 5.0 35.61 17 537 3.97 138 343 31.4 NM 594 11 NA NA 12 30.8 9040 651 67 13 60 1.5 18.5 B2 637 180 <0.2 320 2.14 CB-3R 04/05/2016 4.8 30.51 17 616 0.38 304 509 9.87 NM 742 7.3 NA NA <5 15.7 1090 818 7 45 200 3.34 16.6 820 95 0.379 420 <0.3 CB-3R 07/06/2016 4.9 35.39 22 517 2.49 381 586 9.29 NM 760 6.7 NA NA <5 21.1 697 586 35 21 92 B2 3.58 16.2 723 140 0.321 370 0.428 CB-8 11/18/2010 NM 50.33 14 907 NM NM NM 0.92 NM 972 299 NA NA <5 NA 64.6 579 <5 NA 1.6 25 NA NA 108 <0.1 645 NA CB-8 04/12/2011 5.0 48.60 16 1135 2.89 -79 126 9.23 NM 1110 319 NA NA 11 NA 815 683 7.7 NA 1.8 24.2 NA NA 119 <0.1 617 NA CB-8 07/15/2011 5.1 48.84 18 1102 3.01 -21 184 6.95 NM 1060 271 NA NA 30.8 NA 370 696 41 B NA 1.4 21.2 NA NA 100 <0.1 700 NA CB-8 11/08/2011 5.1 51.53 17 1180 2.87 -83 122 2.67 NM 1360 295 NA NA 5.2 NA 145 786 <5 NA 1.7 25.1 NA NA 96.3 <0.1 764 NA CB-8 04/11/2012 5.1 49.75 15 824 3.04 -64 141 5.29 NM 1080 212 NA NA <5 NA 93.9 709 <5 NA 1.5 19.2 NA NA 113 <0.1 581 NA CB-8 07/17/2012 5.0 40.04 15 682 3.25 552 757 0.38 NM 841 162 NA NA <5 NA <50 552 <5 NA 1.9 15.2 NA NA 63.4 <0.1 407 NA CB-8 11/15/2012 5.0 45.68 15 885 2.37 362 567 7.24 NM 1140 220 NA NA <5 NA 80.6 652 <5 NA 1.8 13 NA NA 97.4 <0.1 516 NA CB-8 04/04/2013 5.0 45.40 15 876 2.54 99 304 4.35 NM 1090 170 NA NA <5 NA 63 679 <5 NA 1.6 18.1 NA NA 90 <0.2 730 NA CB-8 DUP 04/04/2013 5.0 45.40 15 876 2.54 99 304 4.35 NM 1110 170 NA NA <5 NA 97 695 <5 NA 1.6 18 NA NA 89 <0.2 740 NA CB-8 07/02/2013 5.5 44.44 15 719 2.9 20 225 1.77 NM 1060 140 NA NA <5 NA 73 647 <5 NA 1.6 16.5 NA NA 81 <0.2 600 NA CB-8 11/06/2013 5.1 45.46 15 747 2.4 456 661 5.6 NM 1230 160 NA NA <5 NA 225 764 <5 NA 2.1 17.5 NA NA 85 <0.2 490 NA CB-8 DUP 11/06/2013 5.1 45.46 15 747 2.4 456 661 5.6 NM 1230 160 NA NA <5 NA 180 765 <5 NA 2.1 17 NA NA 85 <0.2 490 NA CB-8 04/17/2014 5.2 46.92 15 850 1.9 365 570 4 NM 1570 190 NA NA <5 NA 115 857 <5 NA 2 18.6 NA NA 92 <0.2 610 NA CB-8 07/10/2014 5.0 46.92 16 847 2 372 577 3.3 NM 1700 190 NA NA <5 NA 187 904 <5 NA 2 18.1 NA NA 97 <0.2 820 NA CB-8 DUP 07/10/2014 5.0 46.92 16 847 2 372 577 3.3 NM 1670 190 NA NA <5 NA 134 889 <5 NA 2 18.4 NA NA 97 <0.2 820 NA CB-8 11/03/2014 5.1 49.40 16 884 1.07 502 707 2.26 NM 1860 210 NA NA <5 NA 63 968 <5 NA 1.8 20.3 NA NA 110 <0.2 750 NA Analytical Parameter Analytical Results Background Transition Zone Field Parameters 15A NCAC 02L Standard Reporting Units P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-4 Transition Zone Exceedances Page 1 of 3 TABLE 1-4 TRANSITION ZONE EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Nickel Nitrate (as N)Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg-N/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 250 0.07^0.07^10 1*300 50 100 10 10 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units CB-8 04/07/2015 5.1 50.29 16 1021 1.49 122 327 2.16 NM 2350 220 NA NA <5 2.54 63 1120 <5 NA 1.9 18.6 8.58 NA 120 <0.2 710 NA CB-8 DUP 04/07/2015 5.1 50.29 16 1021 1.49 122 327 2.16 NM 2330 220 NA NA <5 2.76 76 1110 <5 NA 1.9 20.1 8.5 NA 120 <0.2 730 NA CB-8 07/06/2015 5.1 49.45 16 964 1.94 297 502 2.35 NM 2310 220 NA NA <5 2.68 46 1080 <5 1.8 7.7 19.5 8.06 655 140 <0.2 840 <0.3 CB-8 DUP 07/06/2015 5.1 49.45 16 964 1.94 297 502 2.35 NM 2320 220 NA NA <5 2.71 39 1080 <5 1.8 7.8 18.9 8.09 NA 140 <0.2 860 <0.3 CB-8 11/02/2015 5.5 50.93 16 991 1.7 479 684 1.3 NM 2640 220 NA NA <5 2.98 139 1160 <5 1.7 7.5 20.1 8.77 718 110 <0.2 930 0.379 CB-8 12/08/2015 5.3 49.32 14 947 1.35 226 431 1.6 0 2500 221 0.39 NA 0.94 B 3.5 <50 1100 3.1 1.9 NA 21 7.33 650 115 <0.1 652 <1 CB-8 01/20/2016 5.3 46.90 11 886 3.3 456 661 1.1 0 2300 200 0.27 NA <1 4.23 16 1200 2.39 1.6 NA 15.4 7.14 567 120 <0.2 580 <0.3 CB-8 04/06/2016 5.2 44.92 15 771 1.65 519 724 1.31 NM 2130 170 NA NA <5 3.59 48 1060 <5 1.9 8.5 13.7 6.79 489 110 <0.2 550 <0.3 CB-8 07/06/2016 5.1 46.42 20 743 1.55 387 592 2.83 NM 2200 150 NA NA <5 2.7 31 865 <5 2.3 10 B2 14.1 7.11 458 110 <0.2 560 0.354 GW-1D 05/07/2015 5.4 20.66 19 63 0.38 75 280 7.3 <0.5 <50 5 NA NA <1 7.77 951 369 2.5 0.524 NA <1 2.73 33 2.3 <0.2 35 0.451 GW-1D 05/28/2015 5.3 20.59 17 55 0.42 63 268 5.53 <0.5 <50 5.3 NA 0.046 <1 4.02 295 240 1.44 0.542 NA <1 2.52 29 2.9 <0.2 41 <0.3 GW-1D 09/02/2015 5.2 20.67 21 56 0.89 283 488 3.92 NM NA NA NA 0.042 B NA NA NA NA NA NA NA NA NA NA NA NA NA NA GW-1D 12/09/2015 5.3 20.19 16 37 2.3 208 413 0.12 NM <50 3.2 0.072 NA <0.5 1.7 72 72 1.3 0.74 NA <0.5 <5 24 1.3 <0.1 <25 <1 L3 GW-1D 01/18/2016 5.3 20.29 15 43 1.9 178 383 3.55 0 <50 4.2 0.091 NA <1 1.62 221 97 1.1 0.646 NA <1 2.09 25 1.4 <0.2 32 0.339 GW-4 12/14/2007 5.3 15.96 21 327 NM NM NM NM NM 528 10.7 NA NA 8.7 NA 3230 NA 11.4 NA 0.55 <10 NA NA 100 0.16 206 NA GW-4 04/21/2008 5.9 15.49 14 295 NM NM NM NM NM 586 9.8 NA NA 6.8 NA 231 143 9.9 NA 0.37 <10 NA NA 101 <0.1 182 NA GW-4 10/13/2008 5.4 16.04 16 327 NM NM NM NM NM 592 11.6 NA NA 5.3 NA 152 153 11.1 NA 0.51 <10 NA NA 116 0.10 226 NA GW-4 04/14/2009 5.5 15.35 15 306 NM NM NM NM NM 580 11.3 NA NA 5.6 NA 486 170 11.4 NA 0.49 <10 NA NA 112 <0.5 232 NA GW-4 10/16/2009 5.6 15.48 15 328 NM NM NM NM NM 563 13.1 NA NA 5.3 NA 233 176 10.5 NA 0.59 <10 NA NA 112 <0.5 228 NA GW-4 05/11/2010 5.7 15.48 14 287 NM NM NM NM NM 541 12.5 NA NA 7.6 NA 2710 216 8.6 NA 0.46 <10 NA NA 149 0.12 148 NA GW-4 02/19/2014 5.5 20.04 15 423 1.1 371 NM 8.9 NM 915 12 NA NA 7 1.56 422 369 16 NA NA 1.23 NA NA 160 0.24 270 NA GW-4 05/18/2015 5.5 23.26 18 390 1.09 83 288 7.15 <0.5 994 10 NA NA 4.93 <1 67 185 10.9 0.599 NA <1 15.1 170 150 <0.2 260 0.328 GW-5 12/14/2007 5.6 25.85 23 410 NM NM NM NM NM 413 11.9 NA NA 5.4 NA 3740 NA 5.2 NA 0.4 <10 NA NA 125 0.27 270 NA GW-5 04/21/2008 5.1 25.78 19 379 NM NM NM NM NM 398 11.9 NA NA 44.6 NA 46200 971 30.6 NA 1.2 13.9 NA NA 117 0.65 242 NA GW-5 10/13/2008 5.5 25.63 17 378 NM NM NM NM NM 407 14.9 NA NA <5 NA 182 189 <5 NA 1.2 <10 NA NA 120 0.28 246 NA GW-5 04/14/2009 5.5 25.80 19 320 NM NM NM NM NM 387 13.4 NA NA <5 NA 648 192 <5 NA 1.5 <10 NA NA 116 <0.5 248 NA GW-5 10/16/2009 5.6 25.66 17 361 NM NM NM NM NM 341 14 NA NA <5 NA 3090 189 <5 NA 1.3 <10 NA NA 105 <0.5 242 NA GW-5 05/11/2010 5.7 25.73 16 316 NM NM NM NM NM 351 12.3 NA NA <5 NA 1350 170 <5 NA 1.5 <10 NA NA 142 0.33 156 NA GW-5 02/20/2014 5.6 30.10 18 483 0.2 195 NM 71.3 NM 1100 11 NA NA 38 8.37 15600 363 21 NA NA 2.94 NA NA 200 0.75 280 NA MW-1D 05/11/2015 5.3 28.94 20 68 2.02 87 292 1.35 <0.5 <50 2.7 NA NA <1 15.4 107 248 7.67 1.4 NA <1 3.46 31 5.9 <0.2 47 <0.3 MW-1D 05/21/2015 5.5 29.02 18 71 0.65 62 267 3.54 0.5 <50 2.9 NA NA <1 9.45 360 221 4.78 1.2 NA <1 3.32 31 5.3 <0.2 41 <0.3 MW-1D 12/09/2015 5.3 28.43 10 53 1.1 205 410 1.78 0 <50 3.4 <0.03 NA <0.5 3 <50 45 2.8 1.3 NA <0.5 <5 31 2.6 <0.1 32 <1 L3 MW-1D 01/18/2016 5.5 27.07 4 56 1.6 102 307 2.1 0 <50 3.6 <0.03 NA <1 2.47 71 39 2.56 1.3 NA <1 2.69 28 3.5 <0.2 37 <0.3 MW-3D 05/07/2015 6.3 38.88 16 394 0.82 -13 192 35.9 4 531 10 NA NA 194 3.88 12000 633 135 0.039 NA <1 20.5 265 140 <0.2 250 1.75 MW-3D 05/21/2015 6.0 39.44 20 385 0.33 89 294 4.76 5.5 469 11 NA NA <1 <1 12700 560 3.89 0.029 NA <1 20.6 250 140 <0.2 270 <0.3 MW-3D 12/09/2015 5.4 36.77 17 555 0.45 110 315 4.93 3 470 11.6 <0.03 NA 0.72 47 22400 1000 101 0.04 NA <0.5 21.2 450 264 0.15 451 <1 L3 MW-3D 01/20/2016 4.6 33.77 10 444 0.49 49 254 9.74 1.25 639 10 <0.03 NA 1.2 85.2 1540 2620 47.3 16 NA 5.01 17.6 583 190 0.802 310 <0.3 MW-4D 04/28/2015 5.5 8.35 13 54 6.4 83 288 5.19 <0.5 <50 2.9 NA NA <1 12.2 582 204 1.48 1.7 NA <1 2.6 31 1.8 <0.2 35 0.379 MW-4D 05/21/2015 5.1 9.65 16 46 5.04 167 372 2.62 <0.5 <50 3.1 NA NA <1 5.28 34 87 1.07 1.6 NA <1 2.49 27 1.5 <0.2 33 <0.3 MW-5D 05/07/2015 5.5 17.95 14 401 4.74 64 269 0.89 2.5 505 9 NA NA <1 48 10100 557 29.5 1.5 NA 3.41 24.8 252 150 <0.2 250 <0.3 MW-5D DUP 05/07/2015 5.5 17.95 14 401 4.74 64 269 0.89 2.5 505 9 NA NA <1 49.9 9590 569 33 1.5 NA 3 24.5 254 160 <0.2 250 <0.3 MW-5D 05/27/2015 4.0 18.49 17 389 1.7 93 298 2.82 NM 518 9.2 NA 0.021 <1 39.1 484 456 26.1 1 NA 2 22.7 267 190 <0.2 250 <0.3 MW-5D 09/02/2015 3.6 20.27 16 382 1.1 296 501 0.1 NM NA NA NA <0.006 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-5D 12/09/2015 4.2 16.50 14 388 0.23 247 452 2.6 2 590 9 <0.03 NA <0.5 24.8 2100 400 18.4 0.82 NA 4.1 22.3 290 152 <0.1 253 <1 L3 MW-5D 01/19/2016 4.0 16.41 10 392 0.4 312 517 0.47 2.5 638 9.6 <0.03 NA <1 24.3 2440 494 17.5 0.933 NA 3.96 21.5 305 190 <0.2 240 <0.3 MW-6D 04/15/2015 5.8 1.63 15 392 0.32 121 326 5.42 <0.5 1750 11 NA NA 1.25 7.47 406 5280 1.47 <0.01 NA <1 9.7 337 140 0.236 280 0.363 MW-6D 05/21/2015 5.5 4.61 18 383 0.34 428 633 1.06 <0.5 1680 11 NA NA <1 3.85 23 4480 1.13 0.021 NA <1 8.95 302 150 <0.2 260 <0.3 MW-9D 05/04/2015 5.8 29.20 16 2175 3.7 37 242 5.57 2.5 4420 500 NA NA <1 26.9 3300 3670 14.9 0.439 NA 32.2 22.4 1760 250 0.327 1700 0.516 MW-9D 05/21/2015 5.5 29.16 18 2175 0.39 -138 67 1.99 1.5 4620 470 NA NA <1 17.8 2170 3730 10.4 0.083 NA 14.8 31 1890 270 <0.2 1700 <0.3 MW-9D 12/09/2015 5.2 28.81 13 1980 0.22 197 402 8.9 0 5400 M1 501 <0.03 NA <0.5 8.1 680 3400 M1 5.5 0.52 NA 19.8 28.3 1900 242 <0.1 1350 <1 L3 MW-9D 01/20/2016 5.7 28.24 7 2034 0.5 142 347 0.9 0.5 5540 510 <0.03 NA <1 7.06 278 3660 4.46 0.417 NA 20.7 30 1740 280 <0.2 1400 <0.3 MW-11D 02/12/2015 5.9 9.13 7 602 5.67 38 243 5.37 2 88 130 NA NA 1.07 4.21 1870 503 3.7 2.3 NA <1 33 383 22 <0.2 350 1.21 MW-11D 05/20/2015 5.3 8.88 18 595 3.4 91 296 4.01 <0.5 65 130 NA NA <1 1.11 91 159 1.11 2.4 NA <1 35.8 333 18 <0.2 380 <0.3 MW-11D 12/08/2015 5.2 8.52 13 565 3.95 250 455 4.29 0 52 147 <0.03 NA <0.5 <0.5 53 120 <0.5 2.8 NA 0.6 42 310 16 <0.1 348 <1 MW-11D 01/18/2016 5.1 8.25 4 590 4.4 280 485 1.3 0 <50 150 0.091 NA <1 <1 196 134 <1 2.7 NA <1 39.3 296 16 <0.2 300 <0.3 MW-11D 04/07/2016 5.1 9.19 14 601 4.71 279 484 1.2 NM <50 160 0.13 NA <1 <1 74 140 <1 2.4 NA <1 42.9 326 13 <0.2 380 <0.3 MW-11D 07/08/2016 5.4 10.15 17 620 3.56 S 369 574 2.82 0 <50 160 0.28 NA <1 <1 76 149 <1 3.1 NA <1 43.4 356 16 <0.2 440 0.354 MW-12D 03/31/2015 5.5 35.78 19 94 3.04 72 277 7.93 <0.5 <50 8 NA NA 3.35 11 433 480 5.9 1.4 NA <1 7.66 24 7.2 <0.2 56 0.388 MW-12D 05/21/2015 5.2 35.67 19 78 3.13 102 307 6.84 <0.5 <50 9.9 NA NA <1 2.15 118 155 1.27 1.4 NA <1 4.8 20 7.3 0.674 50 <0.3 MW-12D 12/09/2015 4.8 35.11 15 72 3.27 192 397 8.38 0 <50 8.6 0.1 NA 1.5 1.5 240 120 1.8 1.5 NA 0.58 <5 21 6 <0.1 44 D6 <1 L1 MW-12D 01/20/2016 5.3 34.23 7 72 3.3 268 473 6.2 0 <50 8.8 0.076 M1 NA 10.2 1.23 207 123 6.62 1.4 NA <1 3.79 21 7.1 <0.2 32 <0.3 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-4 Transition Zone Exceedances Page 2 of 3 TABLE 1-4 TRANSITION ZONE EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Nickel Nitrate (as N)Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg-N/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 250 0.07^0.07^10 1*300 50 100 10 10 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units MW-13D 02/12/2015 6.8 27.93 8 223 3.65 -11 194 7.28 <0.5 <50 4.4 NA NA <1 4.11 515 563 1.05 0.236 NA <1 4.62 92 4 <0.2 110 1.67 MW-13D 05/20/2015 6.6 29.91 18 165 0.5 -168 37 2.93 2.5 <50 4.4 NA NA <1 6.75 2780 1300 1.08 0.126 NA <1 5.17 114 1.9 <0.2 93 0.503 MW-13D 12/08/2015 9.8 29.47 15 128 0.27 -71 134 4.71 0 <50 4.1 <0.03 NA <0.5 1.2 820 290 <0.5 <0.02 NA <0.5 8.8 450 1.1 <0.1 131 <1 MW-13D 01/20/2016 6.7 27.39 9 132 0.46 -21 184 2.16 2.5 <50 4.6 <0.03 NA <1 4.69 3270 747 <1 0.053 NA <1 5.59 265 1.2 <0.2 69 <0.3 MW-15D 03/04/2015 6.2 4.85 14 132 1.53 48 253 4.33 <0.5 <50 7.3 NA NA <1 <1 202 167 <1 0.666 NA <1 6.94 108 0.67 <0.2 76 0.333 MW-15D 05/20/2015 5.7 6.90 15 94 2.78 72 277 1.83 <0.5 <50 7.7 NA NA <1 <1 109 87 <1 0.787 NA <1 6.49 99 0.29 <0.2 72 0.502 MW-15D 12/08/2015 6.4 4.84 14 118 0.61 185 390 8.35 0 <50 5.7 0.099 M1 NA <0.5 <0.5 310 93 <0.5 0.52 NA <0.5 7.58 120 <1 <0.1 81 <1 MW-15D 01/18/2016 6.3 4.42 7 114 1.5 185 390 2.5 0 <50 11 0.17 NA <1 <1 143 30 <1 0.793 NA <1 7.05 118 0.32 <0.2 75 0.736 MW-15D 04/08/2016 6.2 5.65 12 127 1.33 208 413 1.72 NM <50 19 0.15 NA <1 <1 141 25 <1 0.823 NA <1 8.19 144 0.34 <0.2 91 0.726 MW-15D 07/08/2016 5.7 7.11 17 105 2.64 S 355 560 2.27 0 <50 13 0.24 M1 NA <1 <1 52 16 <1 1.2 NA <1 7.05 114 0.24 <0.2 82 0.639 MW-18D 05/04/2015 5.8 7.50 13 874 1.35 115 320 4.26 2.5 807 88 NA NA <1 7.35 3530 1510 2.87 0.102 NA <1 15.2 321 260 <0.2 620 0.523 MW-18D 05/28/2015 6.1 8.27 17 914 0.78 -126 79 5.04 2 793 94 NA NA <1 4.61 6960 2870 1.89 0.077 NA <1 12.9 298 280 <0.2 650 <0.3 MW-18D 12/08/2015 5.8 6.22 14 878 0.7 260 465 4.76 3.5 850 96 <0.03 NA <0.5 5.5 6100 1300 2.4 0.09 NA <0.5 14.6 270 276 <0.1 662 <1 MW-18D 01/19/2016 6.0 6.22 8 890 2.4 115 320 4.2 2 884 97 <0.03 NA <1 4.44 1840 1290 2.49 0.077 NA <1 12.1 290 300 <0.2 610 <0.3 MW-18D 04/11/2016 5.7 7.45 13 917 1.32 170 375 9.54 NM 887 97 <0.03 NA <1 4.09 1620 1260 2.6 0.037 NA <1 13.8 291 280 <0.2 620 <0.3 MW-18D 07/07/2016 5.6 8.86 17 923 0.17 S 249 454 3.61 NM 875 99 <0.03 NA <1 3.4 3960 1290 2.24 0.082 NA <1 13.6 284 300 <0.2 660 <0.3 MW-21D 06/30/2015 6.2 2.77 19 301 4.6 -96 109 1.92 NM 79 21 NA <0.021 <1 1.66 4640 4560 1.25 0.199 NA 1.19 18.5 95 31 <0.2 170 <0.3 MW-21D 09/01/2015 6.4 3.95 28 1 6.9 224 429 2.12 4 95 24 NA <0.006 <1 <1 14900 2760 <1 0.022 M2 NA <1 15.8 77 24 <0.2 140 <0.3 MW-21D 12/08/2015 5.4 0.91 14 194 0.25 136 341 9.43 3 99 28.4 <0.03 NA <0.5 1.4 3000 820 1.1 0.052 NA <0.5 16.5 72 27.1 <0.1 128 <1 MW-21D 01/18/2016 5.2 0.60 9 185 0.51 152 357 8.42 1 95 29 <0.03 NA <1 1.09 2440 645 <1 0.042 NA <1 15.1 75 29 <0.2 110 <0.3 MW-21D 04/12/2016 5.1 1.99 15 185 0.75 170 375 9.05 NM 79 28 <0.03 NA <1 1.63 1980 B2 552 1.01 <0.01 NA <1 15 72 34 <0.2 130 <0.3 MW-21D 07/07/2016 5.1 3.50 21 181 0.29 S 268 473 7.26 NM 87 28 <0.03 NA <1 1.13 4030 586 <1 0.018 NA <1 15.4 73 31 <0.2 100 <0.3 MW-22D 06/30/2015 5.3 8.61 18 142 3.06 108 313 4.27 NM <50 24 NA 0.484 <1 2.5 184 132 6.1 0.286 NA <1 10.8 44 11 <0.2 90 <0.3 MW-22D 09/01/2015 5.1 11.01 19 136 2.84 188 393 1.03 0 <50 26 NA 0.432 <1 1.65 34 92 5.93 0.253 NA <1 10.5 42 9.8 <0.2 75 0.354 MW-22D 12/08/2015 5.3 1.72 15 193 2.94 118 323 0.74 0 <50 49.9 0.73 NA 0.72 0.82 <50 130 7 0.51 NA <0.5 15.9 72 8.2 0.13 152 <1 MW-22D 01/18/2016 5.1 1.70 13 182 4.01 128 333 0.61 0 <50 45 0.57 NA <1 <1 39 118 6.76 0.444 NA <1 14.1 65 10 <0.2 98 <0.3 MW-22D 04/11/2016 5.1 6.85 15 163 3.52 155 360 1.11 NM <50 35 0.75 M1 NA <1 <1 62 107 5.49 0.29 NA <1 12.7 55 11 0.209 98 <0.3 MW-22D 07/07/2016 4.6 10.53 16 144 3.85 312 517 1.64 NM <50 30 0.64 M1 NA <1 <1 48 92 4.9 0.258 NA <1 11.9 48 11 <0.2 90 0.342 MW-23DL 06/30/2015 7.1 5.55 19 281 0.46 -264 -59 4.97 NM <50 4 NA <0.021 <1 <1 11200 76 <1 <0.01 NA <1 9.41 119 22 <0.2 160 <0.3 MW-23DL 09/03/2015 7.1 6.98 22 278 0.29 -133 72 3.94 4 <50 3.3 NA <0.006 <1 <1 12300 82 <1 0.01 M2 NA <1 7.12 114 15 <0.2 160 0.345 MW-23DL 12/09/2015 7.0 5.22 14 270 0.16 -125 80 8.7 NM <50 3.7 <0.03 NA <0.5 <0.5 12100 77 <0.5 <0.02 NA <0.5 6.5 120 16.7 <0.1 157 <1 L3 MW-23DL 01/19/2016 7.1 4.66 6 268 0.36 -98 107 2.52 2.5 <50 4 <0.03 NA <1 <1 11600 87 <1 0.02 NA <1 6.85 119 22 <0.2 150 <0.3 MW-23DU 06/24/2015 5.6 5.20 19 145 2.24 67 272 1.45 NM 87 7.3 NA 0.022 <1 36.9 162 865 2.76 0.435 NA <1 11 48 26 <0.2 84 <0.3 MW-23DU 09/03/2015 5.5 8.29 19 124 2.33 185 390 1.29 NM 85 6.3 NA 0.065 <1 8.35 222 507 1.5 0.32 NA <1 9.4 38 23 <0.2 83 0.303 MW-23DU 12/09/2015 5.5 7.97 15 119 3.44 134 339 6.9 0 77 7 0.12 NA <0.5 6.7 260 340 1.3 0.5 NA <0.5 8.61 41 20.2 <0.1 71 <1 L1 MW-23DU 01/19/2016 5.6 7.62 11 109 4.29 126 331 4.84 0 84 8 0.15 NA <1 4.57 478 301 1.17 0.454 NA <1 8.62 38 20 <0.2 67 <0.3 MW-23DU DUP 01/19/2016 5.6 7.62 11 109 4.29 126 331 4.84 0 83 8.4 0.13 NA <1 4.68 429 297 1.14 0.45 NA <1 8.56 38 20 <0.2 83 <0.3 PZ-16 02/19/2014 5.8 48.71 18 443 3.8 331 NM 24.6 NM 874 8 NA NA 42 1.99 1850 156 21 NA NA 32.8 NA NA 140 <0.2 280 NA PZ-16 05/18/2015 5.8 49.02 21 326 3.95 114 319 21.7 <0.5 684 4.9 NA NA 11.5 1.31 877 83 5.35 2.1 NA 27 9.48 237 110 <0.2 210 1.29 Prepared by: BER Checked by: TDP Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. Deg C = Degrees Celsius mV = Millivolts mg/L = Milligram per liter ORP = Oxidation Reduction Potential DO = Dissolved oxygen NTU = Nephelometric turbidity unit DUP = Duplicate NA = Not analyzed ug/L = Microgram per liter umhos/cm = Micro mhos per centimeter NE = Not established Temp = Temperature S.U. = Standard Unit ft = Feet mg - N/L = Milligram nitrogen per liter Spec Cond = Specific Conductance NM = Not measured ^ = NC DHHS Health Screening Level. < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10x the concentration in the method blank. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. D6 = The relative percent difference (RPD) between the sample and sample duplicate exceeded laboratory control limits. j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. L1 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high. M1 = Matrix Spike Recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. M2 = Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable. S = Associated calibration check did not meet specified criteria. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-4 Transition Zone Exceedances Page 3 of 3 TABLE 1-5 BEDROCK GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 700 250 0.07^0.07^10 1*300 50 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date AMW-3B 07/23/2014 6.5 7.97 18 88 2.89 163 NM 10.8 NM <1 <1 <50 0.58 NA NA <5 <5 131 17 <1 7.16 NA 1.7 <0.2 92 NA AMW-3B 11/04/2014 NM NM NM NM NM NM NM NM NM <1 <1 NA NA NA NA <1 <1 258 102 <1 8.21 NA NA <0.2 NA NA AMW-3B 05/12/2015 7.7 8.27 16 83 0.84 -69 136 6.86 <0.5 <1 <1 <50 <2.5 NA NA <1 <1 47 <5 <1 6.07 60 3.3 <0.2 72 0.344 AMW-3B 12/08/2015 6.1 8.24 14 73 4.3 40 245 8.56 0 <0.5 <0.5 <50 <1 0.21 NA <0.5 <0.5 <50 <5 <0.5 5.55 59 1.6 <0.1 95 <1 AMW-3B 01/20/2016 6.5 8.09 10 71 4.42 62 267 3.26 0 <1 <1 <50 0.61 0.18 NA <1 <1 20 <5 <1 5.05 58 1.3 <0.2 47 <0.3 AMW-3B 04/12/2016 6.4 8.05 14 71 4.6 69 274 1.78 NM <1 <1 <50 0.6 0.18 NA <1 <1 <10 B2 <5 <1 5.18 56 1.1 <0.2 67 <0.3 AMW-3B 04/28/2016 6.4 8.02 16 74 5.74 220 425 1.93 NM <1 <1 <50 0.6 NA NA <1 <1 NA NA <1 NA NA 0.99 <0.2 58 NA AMW-3B 07/08/2016 5.7 8.04 18 70 5.9 S 312 517 6.6 NM <1 <1 <50 0.65 0.22 NA <1 <1 13 <5 <1 5.12 57 1.1 <0.2 67 0.385 CB-9BR 04/27/2015 8.9 44.46 16 185 0.49 123 328 16.2 <0.5 <1 <1 <50 6.4 NA NA 8.25 <1 460 21 1.56 8.39 115 3.9 <0.2 130 3.03 CB-9BR 05/28/2015 6.5 48.57 16 135 0.36 69 274 10.8 <0.5 <1 <1 <50 6.4 NA 0.014 <1 <1 402 76 <1 4.76 98 1.8 <0.2 96 0.499 CB-9BR 09/08/2015 6.3 49.19 17 105 0.84 133 338 9.89 NM NA NA NA NA NA 0.12 NA NA NA NA NA NA NA NA NA NA NA CB-9BR 12/08/2015 6.6 47.95 14 100 0.55 65 270 7.06 NM <0.5 <0.5 L3 <50 6.1 0.092 NA 1.1 <0.5 460 46 <0.5 <5 68 1.4 <0.1 83 <1 CB-9BR 01/21/2016 6.4 47.30 10 99 0.7 63 268 8.3 0 <1 <1 <50 6.4 0.068 NA 9.08 <1 678 70 <1 3.47 71 1.2 <0.2 76 <0.3 CB-9BR 04/13/2016 6.1 46.93 15 98 0.52 57 262 8.71 NM <1 <1 <50 6.1 0.083 NA 1.3 <1 557 57 <1 3.48 65 1.5 <0.2 82 <0.3 CB-9BR 04/28/2016 6.2 47.21 15 99 0.5 197 402 8.58 NM <1 <1 <50 6.2 NA NA 1.18 <1 NA NA <1 NA NA 1.3 <0.2 66 NA CB-9BR 07/12/2016 6.1 47.58 19 91 0.65 259 464 9.1 0 <1 <1 <50 6.4 0.14 NA 1.5 <1 236 43 <1 4.27 65 1.3 <0.2 67 0.318 CB-9BR DUP 07/12/2016 6.1 47.58 19 91 0.65 259 464 9.1 0 <1 <1 <50 6.4 0.13 NA 1.85 <1 214 42 <1 3.47 65 1.3 <0.2 83 <0.3 ABMW-5BR 04/13/2015 6.4 23.88 15 221 0.86 90 295 1.57 4 <1 <1 <50 7.9 NA NA <1 1.45 17300 128 <1 7.12 115 17 <0.2 160 <0.3 ABMW-5BR 05/27/2015 7.2 24.25 18 301 0.29 -245 -40 57.4 2 <1 <1 <50 8.7 NA 0.013 10.5 4.21 11400 157 <1 18.3 210 19 <0.2 180 <0.3 ABMW-5BR 09/01/2015 9.4 25.35 21 287 0.7 -66 139 22.2 NM NA NA NA NA NA <0.006 NA NA NA NA NA NA NA NA NA NA NA ABMW-11BR 04/14/2016 8.4 111.54 17 288 0.38 20 225 33.7 NM <1 <1 <50 3.2 <0.03 NA 87.2 2.22 3470 85 <1 19.3 104 40 <0.2 190 2.31 ABMW-11BR 07/11/2016 8.1 83.95 22 282 0.36 90 295 9.7 NM <1 <1 <50 3.4 <0.03 NA 11.1 <1 766 98 <1 16.5 102 36 0.396 170 0.69 AMW-1B 08/05/2014 7.1 41.06 17 449 0.23 -102 NM 19.4 NM <1 <1 433 9.7 NA NA <5 <5 4990 392 <1 28 NA 130 <0.2 330 NA AMW-1B DUP 08/05/2014 7.1 41.06 17 449 0.23 -102 NM 19.4 NM <1 <1 433 9.7 NA NA <5 <5 4990 396 <1 28.3 NA 130 <0.2 340 NA AMW-1B 05/19/2015 7.1 41.41 18 430 0.41 -230 -25 8.96 3 <1 <1 422 9.3 NA NA <1 <1 6660 362 <1 22.1 85 120 <0.2 280 <0.3 AMW-1B 12/09/2015 7.1 40.90 16 374 0.2 -134 71 9.77 3 <0.5 <0.5 360 9.1 <0.03 NA <0.5 <0.5 6600 360 <0.5 24.5 71 109 <0.1 273 <1 AMW-1B DUP 12/09/2015 7.1 40.90 16 374 0.2 -134 71 9.77 3 <0.5 <0.5 350 9.1 <0.03 NA <0.5 <0.5 6200 350 <0.5 24.7 70 109 <0.1 246 <1 AMW-1B 01/20/2016 7.2 40.86 14 394 0.21 -124 81 9 4.5 <1 <1 393 9.8 <0.03 M1 NA <1 <1 8110 332 <1 21.2 83 120 <0.2 250 <0.3 AMW-1B DUP 01/20/2016 7.2 40.86 14 394 0.21 -124 81 9 4.5 <1 <1 402 9.9 <0.03 NA <1 <1 7580 353 <1 22.2 83 130 <0.2 260 <0.3 CB-4B 11/18/2010 NM 23.34 13 315 NM NM NM 2.26 NM <0.5 <5 <50 7.9 NA NA <5 NA 429 35.1 <10 NA NA 100 <0.1 219 NA CB-4B 04/10/2012 6.5 22.98 15 363 0.56 -58 147 2.62 NM <0.5 <5 <50 7.1 NA NA <5 NA 338 23.1 <10 NA NA 88.8 <0.1 198 NA CB-4B 07/16/2012 7.1 23.29 20 285 2.24 -41 165 1.87 NM <0.5 <5 <50 7.1 NA NA <5 NA 643 32.8 <10 NA NA 63.2 <0.1 169 NA CB-4B 11/15/2012 7.2 23.23 13 328 0.65 -12 193 1.27 NM <0.5 <5 <50 7 NA NA <5 NA 569 31.6 <10 NA NA 54.7 <0.1 146 NA CB-4B DUP 11/15/2012 7.2 23.23 13 328 0.65 -12 193 1.27 NM <0.5 <5 <50 6.9 NA NA <5 NA 498 30.8 <10 NA NA 55.9 <0.1 147 NA CB-4B 04/03/2013 7.1 22.98 14 302 0.34 -14 191 1.54 NM <1 7.31 <50 6.2 NA NA <5 NA 483 39 <1 NA NA 61 <0.2 170 NA CB-4B 07/01/2013 6.2 23.22 17 296 1.18 -32 173 1.76 NM <1 2.7 <50 5.7 NA NA <5 NA 335 42 <1 NA NA 63 <0.2 170 NA CB-4B 11/06/2013 6.9 23.67 15 286 0.4 37 242 5.1 NM <1 5.39 <50 6.5 NA NA <5 NA 398 45 <1 NA NA 63 <0.2 170 NA CB-4B 04/16/2014 7.2 23.66 14 348 0.3 18 223 1.9 NM <1 10.2 <50 6.6 NA NA <5 NA 529 42 <1 NA NA 68 <0.2 190 NA CB-4B 04/08/2015 7.1 24.35 18 257 0.74 -7 198 2.42 NM <1 1.62 <50 6.2 NA NA <5 <1 625 43 <1 16.4 NA 62 <0.2 180 NA CB-4B 07/07/2015 6.9 24.80 19 263 4.04 174 379 3.1 NM <1 <1 <50 6.2 NA NA <5 <1 315 41 <1 19 144 70 <0.2 170 0.699 CB-4B 11/04/2015 7.0 23.93 15 564 0.41 -183 22 1.91 NM <1 <1 <50 6.9 NA NA <5 <1 638 65 <1 35.4 B2 155 120 <0.2 220 0.353 CB-4B 12/09/2015 7.3 24.08 13 484 0.29 -130 75 2.57 0.5 <0.5 1.3 <50 6.2 <0.03 NA <0.5 B <0.5 1400 60 <0.5 34.1 160 75.5 <0.1 199 <1 Analytical Parameter Background Analytical Results Bedrock Field Parameters 15A NCAC 02L Standard Reporting Units P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-5 Bedrock GW Exceedances Page 1 of 4 TABLE 1-5 BEDROCK GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 700 250 0.07^0.07^10 1*300 50 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units CB-4B 01/19/2016 7.1 23.93 8 517 0.4 -106 99 1.68 1.5 <1 <1 <50 6.6 <0.03 NA <1 <1 1240 67 <1 18.2 129 69 <0.2 280 <0.3 CB-4B 04/05/2016 7.0 24.48 13 236 0.42 -11 195 2.18 NM <1 2.51 <50 6.5 NA NA <5 <1 723 59 <1 16.6 133 60 <0.2 140 <0.3 CB-4B 07/05/2016 7.1 25.45 23 241 0.98 51 256 4.9 NM <1 <1 <50 6.8 NA NA <5 <1 369 19 <1 15.1 128 62 <0.2 150 0.525 CB-8BR 05/11/2015 6.7 48.76 16 458 4.51 44 249 5.39 <0.5 <1 <1 343 47 NA NA 3.83 <1 311 633 3.93 8.79 251 34 <0.2 290 0.678 CB-8BR 05/22/2015 6.8 48.55 15 352 1.89 -55 150 9.14 <0.5 <1 <1 171 26 NA NA <1 <1 601 473 1.4 7.74 178 31 <0.2 210 0.437 CB-8BR 12/08/2015 7.2 48.65 15 269 0.32 -37 168 3.07 0.5 <0.5 <0.5 78 14 <0.03 NA <0.5 <0.5 840 420 <0.5 8.14 150 24.8 <0.1 212 <1 CB-8BR 01/20/2016 7.1 47.03 7 275 3.6 -19 187 8.8 0.5 <1 <1 87 14 <0.03 NA <1 <1 897 452 <1 7.45 148 26 <0.2 180 <0.3 GW-1BR 05/14/2015 7.0 23.71 19 162 2.42 57 262 4.72 1.5 <1 <1 <50 1.3 NA NA <1 <1 1780 93 <1 6.02 84 8.5 <0.2 110 0.575 GW-1BR 05/27/2015 7.8 22.67 20 171 2.13 -211 -6 11.3 <0.5 <1 <1 <50 1.5 NA 0.059 <1 <1 946 66 <1 6.25 88 8.3 <0.2 110 1.08 GW-1BR 09/01/2015 9.0 22.61 19 186 0.6 -56 149 1.5 NM NA NA NA NA NA 0.009 B NA NA NA NA NA NA NA NA NA NA NA GW-1BR 12/09/2015 8.7 22.30 15 163 0.5 -191 14 3.5 NM <0.5 1.1 <50 1.7 <0.03 NA <0.5 <0.5 1100 56 <0.5 8.33 98 3.7 <0.1 103 <1 L1 GW-1BR 01/18/2016 7.0 22.34 6 155 1 -81 124 2.43 NM <1 <1 <50 1.5 <0.03 NA <1 <1 1190 65 <1 7.28 88 5.2 <0.2 110 0.317 GW-2 12/14/2007 5.7 43.51 14 261 NM NM NM NM NM <5 8.3 322 <20 NA NA 31.1 NA 33200 NA <10 NA NA 69.1 0.10 200 NA GW-2 04/21/2008 5.4 43.26 15 266 NM NM NM NM NM <5 <5 386 17.1 NA NA <5 NA 7380 171 <10 NA NA 63.3 0.13 182 NA GW-2 10/13/2008 5.6 43.42 15 333 NM NM NM NM NM <5 <5 400 36.4 NA NA <5 NA 357 66.5 <10 NA NA 70.2 <0.1 204 NA GW-2 04/14/2009 5.5 43.36 15 361 NM NM NM NM NM <5 <5 418 55.5 NA NA <5 NA 286 90.1 <10 NA NA 66 <0.5 294 NA GW-2 10/16/2009 5.7 43.16 16 518 NM NM NM NM NM <5 <5 431 99 NA NA 7 NA 141 130 <10 NA NA 66.4 <0.5 312 NA GW-2 05/11/2010 5.4 42.90 16 620 NM NM NM NM NM <5 <5 377 151 NA NA <5 NA 460 141 <10 NA NA 70.1 <0.1 370 NA GW-2 02/18/2014 5.3 42.87 16 816 2.8 339 NM 4.32 NM <1 1 964 170 NA NA <5 6.9 56 1820 <1 NA NA 78 <0.2 600 NA GW-2 05/14/2015 5.5 42.95 18 900 2.99 77 282 6.81 <0.5 <1 1.02 1050 230 NA NA <1 11.9 115 1780 1.01 6.92 556 85 <0.2 720 <0.3 GW-2 12/10/2015 5.6 42.66 16 1012 2.7 246 451 4.49 0 <0.5 2.4 1400 222 0.072 NA 23 15.3 280 1700 2.4 <25 520 118 0.12 706 1.8 GW-2 01/20/2016 5.6 42.72 16 811 2.1 -97 108 9.98 NM <1 1.82 1720 210 0.05 M1 NA 52 11.5 472 2140 <1 6.83 675 120 <0.2 660 0.581 MW-1BR 05/11/2015 6.8 23.36 18 129 2.53 44 249 9.81 <0.5 <1 <1 <50 1.6 NA NA <1 <1 1370 64 <1 9.19 78 7.8 <0.2 110 <0.3 MW-1BR 05/21/2015 7.0 23.31 19 135 1.55 53 258 3.9 <0.5 <1 <1 <50 1.2 NA NA <1 <1 713 77 <1 6.83 75 8.2 <0.2 110 0.322 MW-1BR 12/09/2015 6.4 23.12 9 99 1 19 224 9.71 2 <0.5 <0.5 <50 1.8 <0.03 NA <0.5 <0.5 2500 73 <0.5 5.47 64 7.1 <0.1 73 <1 L3 MW-1BR 01/18/2016 6.6 22.59 5 102 1.1 -13 192 6.2 1.5 <1 <1 <50 1.7 <0.03 NA <1 <1 3020 75 <1 5.22 63 7.5 <0.2 56 <0.3 MW-2BR 04/13/2015 9.0 31.01 15 270 0.2 104 309 2.44 <0.5 <1 <1 67 5.7 NA NA 2.1 <1 95 25 <1 16.5 79 59 <0.2 200 0.372 MW-2BR 05/21/2015 8.8 31.34 15 274 0.19 67 272 2 <0.5 <1 <1 64 5.4 NA NA <1 <1 61 25 <1 16.8 75 56 <0.2 180 0.373 MW-5BR 05/04/2015 8.1 17.89 21 376 0.12 36 241 14.5 4 <1 <1 418 6.6 NA NA <1 <1 18800 172 <1 15.5 318 120 <0.2 250 0.368 MW-5BR 05/28/2015 6.9 19.23 16 422 0.29 26 231 4.6 1.5 <1 <1 454 8.4 NA NA <1 <1 27900 244 <1 18.1 328 140 0.287 260 <0.3 MW-5BR 12/09/2015 7.0 15.88 14 380 0.27 -115 90 4.85 1.5 <0.5 <0.5 390 7.7 <0.03 NA <0.5 <0.5 31500 210 <0.5 17.1 250 108 <0.1 245 <1 L1 MW-5BR 01/19/2016 7.0 15.79 10 378 0.3 -105 100 4.95 4 <1 <1 360 8.9 <0.03 NA <1 <1 29800 221 <1 16.9 211 120 <0.2 230 <0.3 MW-6BR 02/22/2016 8.9 1.50 15 197 0.54 -84 121 1.04 0 <1 <1 112 3.9 0.053 NA <1 <1 25 <5 <1 22.2 35 48 <0.2 140 <0.3 MW-9BR 05/04/2015 7.2 31.98 19 1022 4.39 -22 183 14.9 <0.5 <1 <1 490 190 NA NA <1 <1 1570 247 <1 24.7 697 86 <0.2 760 0.379 MW-9BR 05/21/2015 6.7 31.90 20 1039 3.01 -107 98 15.5 1.5 <1 <1 530 200 NA NA <1 <1 2540 317 <1 24.6 746 87 <0.2 860 <0.3 MW-9BR 12/09/2015 7.0 31.28 14 1259 0.21 -119 86 3.37 2.5 <0.5 0.84 960 313 <0.03 NA <0.5 0.76 5100 430 <0.5 32.2 1100 106 <0.1 914 <1 L3 MW-9BR 01/20/2016 7.2 30.67 5 1367 0.7 -123 82 3 2 <1 <1 1160 300 <0.03 NA <1 <1 7740 631 <1 30.9 1100 120 <0.2 890 <0.3 MW-9BR 04/25/2016 7.1 31.05 18 1492 0.23 -77 128 5.47 NM <1 <1 1570 330 NA NA <1 <1 NA NA <1 NA NA 130 <0.2 1100 NA MW-13BR 03/03/2015 6.4 28.00 11 104 4.55 8 213 8.04 <0.5 <1 <1 <50 4.6 NA NA <1 1.7 335 268 <1 2.64 31 2.1 <0.2 67 0.879 MW-13BR DUP 03/03/2015 6.4 28.00 11 104 4.55 8 213 8.04 <0.5 <1 <1 <50 4.6 NA NA <1 1.74 319 269 <1 2.68 30 2 <0.2 58 0.82 MW-13BR 05/20/2015 5.4 30.03 18 52 2.53 53 258 3.16 <0.5 <1 <1 <50 4.4 NA NA <1 <1 76 105 <1 2.23 18 1.6 <0.2 34 <0.3 MW-13BR 12/08/2015 5.8 29.57 15 43 2.95 148 353 0.78 0 <0.5 <0.5 L3 <50 4.8 <0.03 NA <0.5 0.55 <50 33 <0.5 <5 16 1.7 <0.1 52 <1 MW-13BR 01/20/2016 5.5 27.43 9 48 3.54 100 305 0.29 0 <1 <1 <50 5 0.25 NA <1 <1 22 25 <1 2.26 16 1.8 <0.2 <25 <0.3 MW-14BR 02/13/2015 7.0 16.44 8 524 4.71 9 214 2.6 <0.5 <1 <1 421 6.9 NA NA <1 <1 76 216 16.5 13.6 295 160 <0.2 350 0.528 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-5 Bedrock GW Exceedances Page 2 of 4 TABLE 1-5 BEDROCK GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 700 250 0.07^0.07^10 1*300 50 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units MW-14BR 05/20/2015 6.8 13.74 16 595 1.83 65 270 3.05 <0.5 <1 <1 386 6.3 NA NA <1 <1 31 31 13.8 9.86 307 170 <0.2 390 <0.3 MW-14BR 12/09/2015 6.7 12.25 13 604 1.3 227 432 6.22 0 <0.5 <0.5 360 5.4 0.07 NA <0.5 <0.5 52 44 9.3 9.46 350 210 <0.1 425 <1 L3 MW-14BR 01/18/2016 6.9 10.52 2 598 3.3 160 365 0.8 0 <1 <1 352 6.2 0.15 NA <1 <1 57 16 9.05 8.99 282 190 <0.2 390 0.333 MW-16BR 03/11/2015 6.3 9.67 13 529 0.43 -63 142 9.7 3 <1 <1 109 120 NA NA <1 3.49 60100 852 <1 21.8 290 31 <0.2 290 <0.3 MW-16BR 05/28/2015 5.9 10.10 15 515 0.12 -165 40 4.14 2.5 <1 <1 117 120 NA NA <1 1.61 56900 715 <1 19.5 266 36 <0.2 310 <0.3 MW-16BR 12/08/2015 6.0 8.77 15 532 0.3 -13 192 2.97 3 <0.5 <0.5 L1 230 118 <0.03 NA <0.5 0.62 53900 720 <0.5 22.2 280 38.1 <0.1 345 <1 MW-16BR 01/19/2016 6.0 8.81 5 556 0.7 -37 168 1.2 2.5 <1 <1 216 130 <0.03 NA <1 <1 58200 757 <1 20.2 278 39 <0.2 310 <0.3 MW-16BR 04/08/2016 6.0 9.49 13 511 0.19 37 242 0.85 NM <1 <1 140 120 <0.03 NA <1 <1 52500 678 <1 21.1 259 35 <0.2 280 <0.3 MW-16BR 07/08/2016 6.0 10.44 16 525 0.21 S 69 274 0.9 6 <1 <1 150 120 <0.6 D3 NA <1 <1 59000 753 <1 21.8 280 41 <0.2 300 <0.3 MW-18BR 05/04/2015 5.9 7.92 16 923 1.4 123 328 5.39 <0.5 <1 <1 892 97 NA NA <1 <1 92 227 1.4 15.5 443 260 <0.2 660 0.554 MW-18BR 05/28/2015 5.7 8.45 17 900 0.81 2 207 1.95 <0.5 <1 <1 851 96 NA NA <1 1.02 125 313 <1 15.2 415 290 <0.2 660 <0.3 MW-18BR 12/08/2015 5.6 6.75 13 889 0.6 297 502 0.99 0 <0.5 <0.5 L3 900 96.4 0.065 NA <0.5 0.98 <50 200 0.59 15.5 400 278 <0.1 659 <1 MW-18BR 01/19/2016 5.8 6.70 8 913 0.5 191 396 0.9 0 <1 <1 974 99 0.056 M1 NA <1 <1 10 221 <1 14 436 290 <0.2 630 <0.3 MW-18BR 04/11/2016 5.6 7.80 14 932 0.54 147 352 0.43 NM <1 <1 906 97 0.043 NA <1 1.14 14 216 <1 14.6 413 290 <0.2 650 <0.3 MW-18BR 07/07/2016 5.6 8.90 19 903 0.42 S 349 554 1.06 NM <1 <1 927 98 <0.03 NA <1 2.1 <10 326 <1 14.3 419 300 <0.2 650 0.34 MW-22BR 06/30/2015 6.4 14.56 17 291 0.78 -130 75 5.69 NM <1 <1 <50 38 NA <0.021 <1 <1 16000 324 <1 16 121 25 <0.2 170 <0.3 MW-22BR 09/01/2015 6.5 15.97 20 294 0.51 -47 158 2.63 5.5 <1 <1 <50 36 NA <0.006 <1 <1 18800 302 <1 18.1 105 22 <0.2 150 0.347 MW-22BR 12/08/2015 6.0 12.53 14 275 0.28 5 210 0.36 3.5 <0.5 <0.5 L3 <50 49.8 <0.03 NA <0.5 <0.5 14400 250 <0.5 18.8 97 18.6 <0.1 180 <1 MW-22BR 01/18/2016 5.9 12.30 13 259 0.18 23 228 3.74 5.5 <1 <1 <50 51 <0.03 NA <1 <1 14700 262 <1 17 98 20 <0.2 140 <0.3 MW-22BR 04/11/2016 5.9 13.70 15 266 0.13 52 257 9.72 NM <1 <1 <50 49 <0.03 NA <1 <1 16900 310 <1 16 101 19 <0.2 160 <0.3 MW-22BR 07/07/2016 5.4 15.60 17 254 0.19 S 82 287 8.47 NM <1 <1 <50 48 <0.03 NA <1 <1 14500 316 <1 15.3 98 19 <0.2 150 <0.3 PZ-1D 12/14/2006 7.0 43.00 16 1 NM NM NM NM NM 10.8 <2 272 20 NA NA <2 NA 4540 1230 <2 92 NA 250 4.4 595 NA PZ-17D 12/14/2006 5.9 50.61 14 0 NM NM NM NM NM <2 <2 762 6.7 NA NA <2 NA 2750 47.9 44.6 9 NA 110 <4 267 NA PZ-17D 06/12/2007 7.3 50.51 16 403 NM NM NM NM NM <0.1 1.5 677 8.44 NA NA 0.14 NA 200 60.8 46.7 NA NA 121 0.053 305 NA PZ-17D 02/18/2014 5.8 53.04 15 518 0.35 298 NM 6.4 NM <1 <1 967 11 NA NA 8 <1 369 49 20.1 NA NA 160 <0.2 340 NA PZ-17D 05/15/2015 5.8 56.41 16 481 0.77 39 244 9.74 <0.5 <1 <1 889 9.4 NA NA 8.66 <1 450 48 22.2 11.1 315 140 <0.2 320 <0.3 PZ-17D 12/09/2015 5.6 54.94 15 439 0.65 165 370 5.59 0 <0.5 <0.5 840 8 0.084 NA 2.4 0.67 220 17 25.9 10.6 310 137 <0.1 297 <1 L1 PZ-17D 01/20/2016 6.1 54.37 11 376 0.53 -103 102 9.92 0 <1 <1 846 8.5 0.12 NA 47.5 1.19 363 31 20.3 10.1 281 150 <0.2 290 0.427 PZ-17D 04/26/2016 5.9 56.68 16 448 3.74 255 460 5.8 NM <1 <1 869 7.1 NA NA <1 4.17 NA NA 29.2 NA NA 140 <0.2 290 NA PZ-17S 12/14/2006 6.3 28.99 14 0 NM NM NM NM NM <2 <2 102 2.8 NA NA <2 NA <20 315 14.8 3.8 NA 49 <4 125 NA PZ-17S 06/12/2007 7.2 28.64 15 146 NM NM NM NM NM 0.57 0.47 66.5 3.5 NA NA <16 NA 319 139 18.3 NA NA 36.1 0.22 95 NA PZ-17S 05/15/2015 5.4 27.44 17 71 5.89 173 378 1.38 <0.5 <1 <1 <50 1.9 NA NA <1 <1 17 24 11 2.74 122 19 <0.2 44 <0.3 PZ-17S 12/09/2015 4.9 27.00 14 63 6.87 157 362 1.76 0 <0.5 <0.5 <50 2.1 0.12 NA <0.5 0.76 <50 20 9.9 <5 120 16.5 <0.1 42 <1 L3 PZ-17S 01/20/2016 5.7 27.14 11 53 6.3 164 369 1.82 0 <1 <1 <50 1.8 0.12 NA <1 <1 40 19 6.48 2.62 96 14 <0.2 35 <0.3 AS-4 02/06/2014 6.2 13.45 11 334 0.7 85 NM 33.3 NM NA <1 108 NA NA NA NA NA 19200 783 NA NA NA NA <0.2 NA NA AS-4 08/05/2014 4.7 NM 16 436 2.44 257 NM 29.2 NM <1 1.44 <50 80 NA NA <5 116 4110 1670 <1 34.5 NA 79 <0.2 270 NA AS-4 02/11/2016 4.5 12.97 12 454 3.82 381 586 9.83 NM <1 1.62 <50 76 <0.03 M1 NA <1 128 2450 1880 <1 39 203 84 <0.2 280 <0.3 AS-5 (Duke)02/09/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 8.1 NA NA <5 <1 87 13 <1 5.31 57 1.4 <0.2 54 <0.3 AS-5 (Vendor)02/09/2015 5.1 NM 15 73 6.2 NM NM 1.1 NM <1 <5 <100 7.75 <10 NA <1 <1 84 12 <5 5.1 60 1.32 <0.1 44 <0.3 AS-6 02/11/2016 6.9 8.70 13 369 0.19 -153 52 22.2 NM <1 <1 79 56 <0.03 NA <1 <1 17300 491 <1 15.9 116 19 <0.2 220 <0.3 AS-9 (Duke)02/09/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 2.5 NA NA <5 <1 <10 <5 <1 6.97 77 5.3 <0.2 93 <0.3 AS-9 (Vendor)02/09/2015 6.2 NM 16 128 4.1 NM NM <1 NM <1 <5 <100 2.17 <10 NA <1 <1 <50 <5 <5 6.4 84 4.68 <0.1 81 <0.3 AS-9 05/12/2016 6.6 NM 15 135 3.89 195 400 0.28 NM <1 <1 <50 2.3 0.077 NA <1 <1 12 <5 <1 7.83 76 4.5 <0.2 84 <0.3 AS-11 (Duke)03/04/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 55 NA NA <5 <1 <10 5 <1 72 226 330 <0.2 590 <0.3 AS-11 (Vendor)03/04/2015 8.6 NM 15 713 2 NM NM <1 NM <1 <1 <500 56 <10 NA <1 <1 <50 <5 <1 72 210 340 <1 560 <5 AS-11 (Duke)07/31/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 52 NA NA <5 <1 59 12 <1 68.5 213 300 <0.2 570 <0.3 Water Supply Wells P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-5 Bedrock GW Exceedances Page 3 of 4 TABLE 1-5 BEDROCK GROUNDWATER EXCEEDANCES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 700 250 0.07^0.07^10 1*300 50 20 NE NE 250 0.2*500 0.3* Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units AS-11 05/09/2016 8.5 NM 17 838 1.15 17 222 0.48 NM <1 <1 54 54 <0.03 NA <1 <1 25 10 <1 64.6 232 320 <0.2 570 <0.3 AS-13 (Duke)06/26/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 80 NA NA <5 <1 445 5 <1 75.7 359 380 <0.2 690 <0.3 AS-13 (Vendor)06/26/2015 7.6 NM 15 990 0.03 NM NM 1.9 NM <0.5 <0.5 38.6 83.9 <0.03 NA <0.5 <0.5 108 5.1 <0.5 77.9 342 356 <0.1 696 <1 AS-13 05/09/2016 8.1 114.00 16 1042 0.44 17 222 1.06 NM <1 <1 63 85 <0.03 NA <1 <1 295 <5 <1 74.5 373 420 <0.2 710 0.47 AS-14 (Duke)06/26/2015 NM NM NM NM NM NM NM NM NM <1 <1 333 9.7 NA NA <5 <1 18 231 <1 18 404 240 <0.2 520 <0.3 AS-14 (Vendor)06/26/2015 7.6 NM 20 709 7.79 NM NM <1 NM <0.5 <0.5 325 10.4 <0.03 NA <0.5 <0.5 <50 240 <0.5 18.8 426 243 <0.1 526 <1 AS-14 (Duke)12/29/2015 NM NM NM NM NM NM NM NM NM <1 <1 312 9.6 NA NA <5 <1 509 185 <1 18.9 438 240 <0.2 520 <0.3 AS-14 (Vendor)12/29/2015 7.4 NM 15 704 1.04 NM NM 3.8 NM <0.5 <0.5 310 10.3 <0.03 NA <0.5 <0.5 568 200 <0.5 20.7 491 228 <0.1 504 <1 AS-14 05/11/2016 7.6 NM 15 713 4.63 48 253 0.16 NM <1 <1 339 9.5 <0.03 NA <1 <1 695 221 <1 19.2 480 250 <0.2 510 <0.3 AS-15 (Duke)08/07/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 2 NA NA <5 <1 <10 13 <1 2.97 43 1.1 <0.2 44 <0.3 AS-15 (Vendor)08/07/2015 5.7 NM 17 58 7.62 NM NM <1 NM <0.5 <0.5 <5 2.3 <0.3 NA <0.5 <0.5 <50 13.5 <0.5 3.22 44.5 2.1 <0.1 47 <1 AS-16 (Vendor)09/30/2013 NM NM NM NM NM NM NM <1 NM NA <2 <50 7.9 NA NA <10 NA <50 11 <5 7.1 NA <2 <2 54 NA AS-17 (Duke)08/14/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 0.55 NA NA <5 <1 510 16 <1 5.59 62 6.4 <0.2 74 <0.3 AS-17 (Vendor)08/14/2015 6.4 NM 15 77 1.06 NM NM 1.2 NM <0.5 <0.5 <5 <1 <0.03 NA <0.5 <0.5 379 14.6 <0.5 5.15 54.7 6.5 <0.1 65 <1 AS-20 (Duke)11/25/2015 NM NM NM NM NM NM NM NM NM <1 <1 149 19 NA NA <5 <1 124 42 <1 25.6 323 170 <0.2 370 <0.3 AS-20 (Vendor)11/25/2015 7.5 NM 12 552 0.29 NM NM <1 NM <0.5 <0.5 <5 20.6 <0.03 NA <0.5 <0.5 <50 37.3 <0.5 25.1 301 420 <0.1 388 <1 AS-20 06/06/2016 7.5 79.00 15 473 4.3 67 272 6.9 NM <1 <1 108 20 <0.03 NA <1 <1 1630 33 <1 22.6 275 150 <0.2 320 <0.3 DW-6 08/05/2014 6.0 NM 16 102 8.12 129 NM 148 NM <1 <1 <50 1.4 NA NA <5 <5 4060 85 <1 7.83 NA 0.25 <0.2 90 NA DW-6 02/11/2016 6.6 6.92 13 161 0.28 -94 111 71 NM <1 <1 <50 1.6 <1.5 NA <1 <1 28000 607 <1 7.71 94 0.46 <0.2 68 <0.3 Prepared by: BER Checked by: TDP Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. Spec Cond = Specific Conductance Deg C = Degrees Celsius NTU = Nephelometric turbidity unit DUP = Duplicate umhos/cm = Micro mhos per centimeter NE = Not established S.U. = Standard Unit mg/L = Milligram per liter DO = Dissolved oxygen ft = Feet mV = Millivolts ORP = Oxidation Reduction Potential NA = Not analyzed ug/L = Microgram per liter ^ = NC DHHS Health Screening Level NM = Not measured Temp = Temperature Eh = Redox Potential < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10x the concentration in the method blank. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. D3 = Sample was diluted due to the presence of high levels of non-target analytes or other matrix interference. L1 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. M1 = Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. S = Associated calibration check did not meet specified criteria. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-5 Bedrock GW Exceedances Page 4 of 4 TABLE 1-6 WATER LEVEL MEASUREMENTS - DECEMBER 17, 2015 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Identification Northing (Feet) Easting (Feet) Measuring Point TOC (Feet MSL) Ground Surface (Feet, MSL) Measured Depth to Water (Feet TOC) Water Level (Feet, MSL) ABMW-02 644193.446 944173.886 2150.30 2147.48 25.70 2124.60 ABMW-02S 644197.299 944173.307 2150.29 2147.43 25.02 2125.27 ABMW-04 643664.020 944356.036 2156.41 2153.10 36.45 2119.96 ABMW-04BR 643658.200 944364.242 2156.41 2153.20 36.86 2119.55 ABMW-04D 643658.738 944355.794 2156.43 2153.23 37.02 2119.41 AMW-1B 641961.050 944768.251 2083.58 2080.53 41.09 2042.49 AMW-2A 642100.644 945131.558 2107.93 2104.95 21.75 2086.18 AMW-2B 642095.044 945124.957 2107.45 2104.09 29.85 2077.60 AMW-3A 641987.415 948032.186 2173.37 2169.87 8.23 2165.14 AMW-3B 641985.979 948035.656 2173.00 2169.62 9.33 2163.67 APD-7 644738.779 943971.131 2157.01 NA 24.94 2132.07 APZ-30 642200.800 944983.630 2103.50 2100.31 11.61 2091.89 B-1 644207.664 943620.697 2126.64 2123.73 33.19 2093.45 B-1-A 644209.915 943618.451 2126.67 2123.36 21.61 2105.06 B-2 644385.422 943539.606 2126.40 2123.67 29.84 2096.56 CB-01BR 643309.762 946467.632 2197.18 2197.18 39.08 2158.10 CB-01D 643314.249 946470.176 2197.21 2197.21 39.04 2158.17 CB-08BR 645127.296 943045.093 2139.92 2139.92 47.43 2092.49 CB-09BR 645585.651 944225.418 2181.11 2178.15 48.65 2132.46 CB-09SL 645595.251 944227.571 2181.42 2178.17 35.85 2145.57 CB-1 643345.477 946546.013 2212.91 2210.41 50.38 2162.53 CB-2 642685.159 945930.767 2167.79 2167.79 29.07 2138.72 CB-3 642516.480 945138.560 2133.23 2130.55 29.45 2103.78 CB-3R 642444.276 945214.046 2138.97 2135.83 33.34 2105.63 CB-4 642173.370 944539.220 2067.24 2064.77 18.59 2048.65 CB-4B 642177.823 944537.287 2066.34 2064.04 24.14 2042.20 CB-5 641932.394 944098.641 2040.49 2037.86 3.51 2036.98 CB-6 643018.535 943602.512 2035.48 2032.46 3.31 2032.17 CB-7 643584.343 943192.079 2034.72 2032.00 6.47 2028.25 CB-8 645101.565 943051.279 2145.19 2142.49 49.06 2096.13 CB-9 645590.500 944231.165 2182.08 2178.86 36.96 2145.12 DP-1 644598.121 944155.982 2144.35 NA 11.23 2133.12 GW-01BR 644226.305 946513.036 2181.49 2178.11 22.51 2158.98 GW-01D 644229.405 946520.488 2181.32 2178.33 20.49 2160.83 GW-1 644238.841 946531.794 2181.16 2171.70 20.36 2160.80 GW-2 644159.600 943456.300 2094.20 2092.20 42.85 2051.35 GW-3 643613.600 943710.200 2071.10 2069.10 12.11 2058.99 GW-4 642665.000 944495.400 2084.40 2082.50 24.32 2060.08 GW-51 642527.400 945181.500 2138.40 2136.40 32.20 2106.20 MW-01BR 643966.653 946144.160 2170.03 2166.99 23.24 2146.79 MW-01D 643962.563 946147.959 2170.19 2166.95 28.35 2141.84 MW-03BR 642476.982 945214.383 2141.31 2138.15 55.39 2085.92 MW-03D 642486.811 945215.216 2142.04 2139.03 37.63 2104.41 MW-05BR 642369.098 944866.403 2085.74 2085.35 16.65 2069.09 MW-05D 642371.685 944870.236 2085.85 2085.54 17.35 2068.50 MW-06BR 642610.670 944767.718 2062.31 2059.28 1.59 2060.72 MW-06D 642608.295 944772.910 2062.73 2059.45 4.81 2057.92 MW-06S 642607.038 944778.440 2063.12 2059.85 4.43 2058.69 MW-07BR 643619.050 943730.983 2073.58 2070.16 39.75 2033.83 MW-08BR 644588.011 943388.961 2123.89 2123.90 9.50 2114.39 MW-08S 644584.030 943389.913 2123.34 2123.46 6.21 2117.13 MW-09BR 644862.111 943406.689 2145.43 2142.22 31.20 2114.23 MW-09D 644856.171 943403.214 2145.09 2141.82 28.78 2116.31 MW-09S 644850.643 943401.141 2144.61 2141.51 28.15 2116.46 MW-10 641997.910 948045.120 2171.20 2167.82 5.81 2165.39 MW-11 646195.800 942195.910 2035.00 2031.72 7.00 2028.00 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-6 Water Elevation Data - December 2015 Page 1 of 2 TABLE 1-6 WATER LEVEL MEASUREMENTS - DECEMBER 17, 2015 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Identification Northing (Feet) Easting (Feet) Measuring Point TOC (Feet MSL) Ground Surface (Feet, MSL) Measured Depth to Water (Feet TOC) Water Level (Feet, MSL) MW-11D 646194.603 942186.783 2035.22 2032.44 8.79 2026.43 MW-12BR 645001.825 943708.374 2161.88 2158.92 47.70 2114.18 MW-12D 645000.207 943704.170 2161.89 2158.83 34.92 2126.97 MW-13BR 645439.848 943740.800 2154.28 2151.48 29.33 2124.95 MW-13D 645440.319 943735.670 2153.97 2151.23 29.24 2124.73 MW-14BR 645921.638 942943.861 2076.87 2076.88 13.09 2063.78 MW-15A 645527.168 942348.227 2034.60 2031.64 6.56 2028.04 MW-15BR 645533.236 942347.132 2034.62 2031.68 5.64 2028.98 MW-15D 645539.537 942346.395 2034.41 2031.48 5.33 2029.08 MW-16A 644728.661 942586.871 2036.96 2033.85 9.01 2027.95 MW-16BR 644724.671 942588.372 2037.02 2033.66 9.27 2027.75 MW-17A 644122.021 942913.030 2034.81 2032.16 5.23 2029.58 MW-18BR 643580.556 943192.704 2035.54 2032.78 7.16 2028.38 MW-18D 643583.294 943186.685 2035.44 2032.49 6.80 2028.64 MW-19BR 643013.092 943570.759 2036.18 2033.42 4.20 2031.98 MW-20A 642458.090 943846.028 2037.38 2034.18 4.66 2032.72 MW-21D 641783.209 944429.867 2044.23 2044.54 2.64 2041.59 MW-22BR 641599.235 944541.539 2048.98 2049.33 12.88 2036.10 MW-22D 641604.320 944539.421 2049.06 2049.37 3.21 2045.85 MW-23BR 641966.862 945482.880 2106.44 2103.14 41.34 2065.10 MW-23DL 641967.401 945486.766 2106.26 2103.13 5.22 2101.04 MW-23DU 641966.029 945479.960 2106.36 2103.00 7.99 2098.37 MW-24BR 645580.361 950648.826 2173.03 2170.44 9.64 2163.39 MW-24S 645579.360 950641.347 2173.44 2170.89 11.07 2162.37 P-100 642810.189 944985.522 2164.55 2164.55 78.26 2086.29 P-101 642913.542 944784.735 2164.71 2164.71 88.42 2076.29 P-102 643547.213 944773.538 2165.28 2165.28 52.41 2112.87 P-103 643790.300 944960.145 2163.90 2163.90 48.77 2115.13 P-104 644847.977 943912.409 2174.26 2174.26 44.18 2130.08 P-105 645029.624 943789.910 2174.17 2174.17 44.02 2130.15 PZ-16 643153.600 944361.200 2167.00 2164.20 47.72 2119.28 PZ-17D 643136.200 944195.800 2149.20 2147.40 55.06 2094.14 PZ-17S 643132.800 944189.800 2148.80 2146.70 27.10 2121.70 PZ-19 642899.700 944420.900 2105.40 2102.50 26.29 2079.11 PZ-22 642575.400 944801.900 2062.60 2063.00 3.02 2059.58 PZ-26 643980.900 946109.200 2168.30 2165.70 26.53 2141.77 Prepared by: BDW Checked by: TDP Notes: NA - Not Available P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-6 Water Elevation Data - December 2015 Page 2 of 2 TABLE 1-7 BACKROUND ANALYTICAL RESULTS THROUGH CSA ROUND 5 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-7 BG Analytical Results.xlsx Page 1 of 4 pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Alkalinity Aluminum Antimony Arsenic Barium Beryllium Bi- carbonate Alkalinity Boron Cadmium Calcium Carbonate Alkalinity Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Methane Molybdenum S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE NE NE 1*10 700 4*NE 700 2 NE NE 250 0.07^0.07^10 1*1000 300 15 NE 50 1 NE NE Sample ID Sample Collection Date MW-10 03/05/2014 5.4 5.72 10 72 5.94 226 NM 2.9 NM NA NA NA <1 57 NA NA <50 <1 NA NA 4.4 NA NA <5 3.18 <5 207 <1 NA 187 <0.05 NA <1 MW-10 04/17/2014 5.0 5.64 12 68 0.3 182 NM 2.9 NM NA NA <1 <1 48 NA NA <50 <1 NA NA 8.3 NA NA <5 NA <5 1040 <1 NA 573 <0.05 NA NA MW-10 07/23/2014 4.6 5.70 19 67 0.38 244 NM 0.93 NM 5.4 NA <1 <1 48 NA NA <50 <1 2.54 NA 8.4 NA NA <5 <5 <5 598 <1 2.57 363 <0.05 NA <1 MW-10 11/04/2014 NM NM NM NM NM NM NM NM NM NA 51.8 <1 <1 45 <1 NA NA <1 2.34 B2 NA NA NA NA <1 6.11 <1 675 <1 2.4 555 NA NA NA MW-10 05/12/2015 5.0 5.58 16 64 0.96 47 252 4.09 <0.5 <10 121 <1 <1 47 <1 <10 <50 <1 2.39 <10 8.9 NA NA <1 4.29 <1 369 <1 2.59 340 <0.05 230 <1 MW-10 12/08/2015 5.4 5.79 14 74 0.4 27 232 0.69 0 11 <100 <0.5 <0.5 50 0.22 11 <50 <0.08 2.46 <5 12.6 0.14 NA <0.5 3.6 <1 64 <0.1 2.75 200 <0.2 78 <0.5 MW-10 01/19/2016 5.1 5.62 8 72 0.53 481 686 0.71 0 6.3 44 <1 <1 54 <1 6.3 <50 <1 2.32 <5 14 0.17 M1 NA <1 2.99 <1 63 <1 2.8 185 0.1 71.8 <1 MW-10 04/12/2016 5.1 5.69 13 67 0.37 141 346 1.82 NM 10.8 39 <1 <1 50 <1 10.8 <50 <1 2.3 <5 12 0.12 NA <1 2.12 <1 54 B2 <1 2.58 142 <0.05 32.7 <1 AMW-3A 11/04/2014 NM NM NM NM NM NM NM NM NM NA 411 <1 <1 55 <1 NA NA <1 49.4 B2 NA NA NA NA 12.4 <1 1.15 153 <1 0.502 22 NA NA NA AMW-3A 05/12/2015 12.1 8.17 15 2350 5.41 -189 16 1.5 <0.5 440 7200 <1 <1 49 <1 30 <50 <1 188 350 1.1 NA NA <1 <1 1.17 <10 <1 0.007 <5 <0.05 <10 <1 CB-1 11/17/2010 4.6 47.73 14 15 NM NM NM 9.16 NM NA NA <0.5 <5 21.6 NA NA <50 <0.08 NA NA <5 NA NA <5 NA <5 1160 <5 NA 46.3 <0.2 NA NA CB-1 04/12/2011 4.4 48.20 17 18 7.57 126 331 4.81 NM NA NA <0.5 <5 18.9 NA NA <50 <0.08 NA NA <5 NA NA <5 NA 16.6 589 <5 NA 36.3 <0.2 NA NA CB-1 07/19/2011 4.8 48.40 22 17 7.16 -4 201 17.6 NM NA NA <0.5 <5 21.1 B NA NA 51.1 <0.08 NA NA <5 NA NA 81.5 NA 6.4 1330 <5 NA 43 <0.2 NA NA CB-1 11/09/2011 5.4 50.47 12 19 8.36 -86 119 20.9 NM NA NA <0.5 6.7 52.4 NA NA <50 <0.08 NA NA <5 NA NA 8.7 NA 26.2 17800 6 NA 293 <0.2 NA NA CB-1 04/10/2012 4.8 49.75 15 16 9.67 -44 161 8.11 NM NA NA <0.5 <5 15.8 NA NA <50 <0.08 NA NA <5 NA NA <5 NA <5 276 <5 NA 28.4 <0.2 NA NA CB-1 07/16/2012 4.6 49.09 16 20 8.65 317 522 3.65 NM NA NA <0.5 <5 17.5 NA NA <50 <0.08 NA NA 1.6 NA NA <5 NA <5 179 <5 NA 26.8 <0.2 NA NA CB-1 11/15/2012 4.9 50.89 16 18 7.82 335 540 7.86 NM NA NA <0.5 <5 14.6 NA NA <50 <0.08 NA NA 1.4 NA NA <5 NA <5 218 <5 NA 28.5 <0.2 NA NA CB-1 04/03/2013 4.5 49.47 15 20 7.89 135 340 4.78 NM NA NA <1 <1 16 NA NA <50 <1 NA NA 1.5 NA NA 15 NA <5 98 <1 NA 27 <0.05 NA NA CB-1 07/01/2013 5.3 44.71 16 24 8.75 60 265 9.2 NM NA NA <1 <1 25 NA NA <50 <1 NA NA 1.7 NA NA <5 NA <5 2870 <1 NA 67 <0.05 NA NA CB-1 11/05/2013 4.5 43.93 15 18 9.4 413 618 12 NM NA NA <1 <1 21 NA NA <50 <1 NA NA 1.6 NA NA <5 NA <5 664 <1 NA 33 <0.05 NA NA CB-1 04/16/2014 4.4 46.05 15 17 8.3 410 615 2.8 NM NA NA <1 <1 19 NA NA <50 <1 NA NA 1.7 NA NA <5 NA <5 152 <1 NA 24 <0.05 NA NA CB-1 07/09/2014 4.6 46.41 16 18 8.67 387 592 3.6 NM NA NA <1 <1 20 NA NA <50 <1 NA NA 1.7 NA NA <5 NA <5 215 <1 NA 26 <0.05 NA NA CB-1 11/03/2014 4.5 48.24 16 22 7.53 352 557 7.09 NM NA NA <1 <1 19 NA NA <50 <1 NA NA 1.7 NA NA <5 NA <5 175 <1 NA 25 <0.05 NA NA CB-1 04/07/2015 4.9 45.50 15 17 8.68 136 341 6.74 NM <5 269 <1 <1 19 <1 <5 <50 <1 0.044 <5 1.6 NA NA <5 1.94 <5 279 <1 0.407 26 <0.05 NA <1 CB-1 07/06/2015 4.7 49.12 16 20 8.34 161 366 3.82 NM <5 150 <1 <1 21 <1 <5 <50 <1 0.143 <5 1.7 NA NA <5 1.95 12 86 <1 0.448 25 <0.05 <10 <1 CB-1 11/03/2015 5.1 50.73 16 15 7.9 525 730 21 NM <5 3180 M1 <1 <1 25 <1 <5 <50 <1 0.053 B2 <5 1.2 NA NA 5 4.11 7 4040 <1 0.893 91 <0.05 NA <1 CB-1 DUP 11/03/2015 5.1 50.73 16 15 7.9 525 730 21 NM <5 3370 <1 <1 26 <1 <5 <50 <1 0.055 <5 1.2 NA NA <5 4.18 7 4560 <1 1.03 98 <0.05 NA <1 CB-1 12/08/2015 5.1 50.76 15 15 6.4 69 274 8.8 0 <5 230 <0.5 <0.5 16 <0.2 <5 <50 <0.08 <0.1 <5 1.6 0.031 NA 0.78 1.9 <1 290 <0.1 0.324 27 <0.2 <10 <0.5 CB-1 01/20/2016 4.9 48.27 10 16 8.32 220 425 7.81 0 <5 336 <1 <1 20 <1 <5 <50 <1 0.041 <5 2.2 <0.03 NA <1 2.1 <1 279 <1 0.383 28 <0.05 <10 <1 CB-1 04/07/2016 4.9 44.14 14 17 8.22 329 534 9.74 NM <5 516 <1 <1 21 <1 <5 <50 <1 0.067 <5 2 <0.03 NA <5 2.36 <5 532 <1 0.469 31 <0.05 <10 <1 CB-9 11/15/2012 5.0 37.78 15 46 1.66 399 604 8.42 NM NA NA <0.5 <5 29.2 NA NA <50 <0.08 NA NA 6.8 NA NA <5 NA <5 2880 <5 NA 105 <0.2 NA NA CB-9 04/03/2013 4.9 37.18 15 40 7.8 112 317 2.01 NM NA NA <1 <1 28 NA NA <50 <1 NA NA 6.5 NA NA <5 NA <5 370 <1 NA 67 <0.05 NA NA CB-9 07/01/2013 5.3 34.74 16 48 1.9 38 243 8.43 NM NA NA <1 <1 31 NA NA <50 <1 NA NA 6.4 NA NA 6 NA <5 2080 <1 NA 92 <0.05 NA NA CB-9 11/05/2013 4.7 35.72 15 38 2.8 378 583 8.7 NM NA NA <1 <1 28 NA NA <50 <1 NA NA 6.8 NA NA <5 NA <5 883 <1 NA 60 <0.05 NA NA CB-9 04/16/2014 4.8 36.13 15 38 2.2 347 552 3.5 NM NA NA <1 <1 25 NA NA <50 <1 NA NA 6.9 NA NA <5 NA <5 248 <1 NA 39 <0.05 NA NA CB-9 07/09/2014 4.8 35.89 16 38 2.59 353 558 5.3 NM NA NA <1 <1 26 NA NA <50 <1 NA NA 6.8 NA NA <5 NA <5 531 <1 NA 47 <0.05 NA NA CB-9 11/03/2014 4.9 37.18 15 47 2.01 228 433 8.34 NM NA NA <1 <1 25 NA NA <50 <1 NA NA 6.9 NA NA <5 NA <5 341 <1 NA 41 <0.05 NA NA CB-9 04/07/2015 5.0 37.29 16 38 2.24 114 319 8.79 NM <5 347 <1 <1 29 <1 <5 <50 <1 0.504 <5 6.7 NA NA <5 1.36 <5 653 <1 1.03 50 <0.05 NA <1 CB-9 07/06/2015 4.9 37.02 16 41 2.25 159 364 4.5 NM <5 103 <1 <1 29 <1 <5 <50 <1 0.545 <5 6.7 NA NA <5 <1 <5 158 <1 0.976 40 <0.05 <10 <1 CB-9 09/09/2015 5.0 37.50 16 37 1.97 223 428 7.51 NM NA NA NA NA NA NA NA NA NA NA NA NA NA 0.109 NA NA NA NA NA NA NA NA NA NA CB-9 11/02/2015 4.5 36.57 16 37 2.7 575 780 9 NM <5 542 <1 <1 31 <1 <5 <50 <1 0.52 <5 6.6 NA NA <5 1.64 <5 1050 <1 1.12 65 <0.05 NA <1 CB-9 12/08/2015 5.3 37.09 15 36 1.72 204 409 3.38 0 <5 <100 <0.5 <0.5 L1 26 <0.2 <5 <50 <0.08 0.491 <5 6.7 0.1 NA <0.5 0.8 1.4 150 <0.1 0.929 34 <0.2 <10 <0.5 CB-9 DUP 12/08/2015 5.3 37.09 15 36 1.72 204 409 3.38 0 <5 <100 <0.5 <0.5 L3 26 <0.2 <5 <50 <0.08 0.495 <5 6.8 0.11 NA <0.5 0.77 <1 91 <0.1 0.932 33 <0.2 <10 <0.5 CB-9 01/21/2016 5.2 35.48 15 36 1.8 284 489 1.8 0 <5 62 <1 <1 26 <1 <5 <50 <1 0.463 <5 6.9 0.12 NA <1 <1 <1 84 <1 0.913 36 <0.05 <10 <1 CB-9 04/06/2016 5.1 34.71 15 37 2.21 336 541 9.33 NM <5 361 <1 <1 29 <1 <5 <50 <1 0.479 <5 6.9 0.089 NA <5 1.45 <5 739 <1 1.01 52 <0.05 <10 <1 CB-9SL 04/27/2015 6.0 36.05 13 76 1.08 130 335 30.4 <0.5 25 1280 <1 <1 46 <1 25 <50 <1 4.15 <10 6.1 NA NA 2.86 1.21 <1 475 <1 2.56 125 <0.05 <10 <1 CB-9SL 05/28/2015 5.8 35.98 19 59 1.59 84 289 5.97 <0.5 16 119 <1 <1 32 <1 16 <50 <1 3.38 <10 6.6 NA NA <1 <1 <1 73 <1 1.77 71 <0.05 <10 1.25 CB-9SL 09/08/2015 5.8 36.51 16 59 2.61 165 370 3 NM NA NA NA NA NA NA NA NA NA NA NA NA NA 0.111 NA NA NA NA NA NA NA NA NA NA CB-9SL 12/08/2015 6.0 35.99 14 56 2.11 198 403 6.44 0 14.8 280 <0.5 <0.5 L3 44 0.29 14.8 <50 <0.08 3.49 <5 6.2 0.2 NA 1.3 <0.5 1.5 320 0.19 1.98 12 <0.2 <10 <0.5 CB-9SL 01/21/2016 5.8 34.50 9 54 2 225 430 7.1 0 14.1 167 <1 <1 43 <1 14.1 <50 <1 3.14 <5 6.5 0.2 NA <1 <1 <1 95 <1 1.88 15 <0.05 <10 <1 CB-9SL 04/13/2016 5.6 34.05 15 56 1.63 97 302 1.05 NM 13.6 29 <1 <1 37 <1 13.6 <50 <1 2.86 <5 6.3 0.25 NA <1 <1 <1 23 <1 1.78 6 <0.05 <10 <1 MW-24S 05/11/2015 5.0 11.26 17 75 5.48 72 277 1.77 NM <10 174 <1 <1 57 <1 <10 <50 <1 3.23 <10 12 NA NA <1 2.05 <1 304 <1 3.6 170 <0.05 <10 <1 MW-24S 06/01/2015 5.2 11.19 15 79 4.67 97 302 2.74 <0.5 <10 91 <1 <1 55 <1 <10 <50 <1 3.15 <10 13 NA NA <1 1.02 <1 60 <1 3.4 136 <0.05 <10 <1 MW-24S 09/02/2015 5.2 11.34 18 78 5.03 193 398 0.96 NM NA NA NA NA NA NA NA NA NA NA NA NA NA 0.152 NA NA NA NA NA NA NA NA NA NA MW-24S 12/08/2015 5.2 10.95 14 77 4.81 154 359 0.25 0 7.6 <100 <0.5 <0.5 L3 53 0.23 7.6 <50 <0.08 3.24 <5 13 0.3 M1 NA <0.5 0.78 <1 <50 <0.1 3.61 120 <0.2 <10 <0.5 MW-24S 01/19/2016 5.3 10.98 12 79 5.12 148 353 0.8 0 7.1 38 <1 <1 56 <1 7.1 <50 <1 3.03 <5 14 0.31 NA <1 1.06 <1 <10 <1 3.65 150 <0.05 <10 <1 MW-24S 04/12/2016 5.2 11.30 14 81 4.66 205 410 0.75 NM 15.8 271 <1 <1 253 <1 15.8 232 <1 3.1 <5 14 0.26 NA <1 <1 <1 235 B2 <1 3.73 359 <0.05 <10 <1 MW-24S DUP 04/12/2016 5.2 11.30 14 81 4.66 205 410 0.75 NM 6.4 55 <1 <1 59 <1 6.4 <50 <1 3.07 <5 15 0.26 NA <1 <1 <1 16 B2 <1 3.68 153 <0.05 <10 <1 Field Parameters 15A NCAC 02L Standard Reporting Units Analytical Parameter Surficial Alluvial Saprolite Analytical Results TABLE 1-7 BACKROUND ANALYTICAL RESULTS THROUGH CSA ROUND 5 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-7 BG Analytical Results.xlsx Page 2 of 4 Nickel Nitrate (as N)Nitrate Potassium Selenium Silver Sodium Strontium Sulfate Sulfide Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Zinc Radium-226 Radium-228 Uranium-233 Uranium-234 Uranium-236 Uranium-238 Fe(II)Fe(III)Mn(II)Mn(IV)Se(IV)Se(VI)SeCN MeSe(IV)SeMe Se (UK) ug/L mg-N/L mg/L mg/L ug/L ug/L mg/L ug/L mg/L mg/L ug/L mg/L mg/L mg/L ug/L ug/L pCi/l pCi/l ug/mL ug/mL ug/mL ug/mL ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 100 10 10 NE 20 20 NE NE 250 NE 0.2*500 NE NE 0.3*1000 NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE Sample ID Sample Collection Date MW-10 03/05/2014 <5 NA NA NA <1 NA NA NA 0.63 NA <0.2 55 NA NA NA 29 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10 04/17/2014 <5 0.04 0.16 NA <1 NA NA NA 0.41 NA <0.2 48 NA NA NA 17 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10 07/23/2014 <5 0.1 0.42 1.51 <1 NA 3.3 NA 0.58 NA <0.2 44 NA NA NA 15 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10 11/04/2014 2.95 NA NA 1.41 <1 <1 3.27 NA NA NA <0.2 NA NA NA NA 17 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10 05/12/2015 3.1 0.096 NA 1.36 <1 NA 4.02 24 0.3 <0.1 <0.2 44 0.71 <5 <0.3 85 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10 12/08/2015 2.9 0.088 NA <5 <0.5 NA 5.09 24 <1 <0.1 0.13 91 <1 <3 <1 12 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10 01/19/2016 2.78 0.099 NA 1.35 <1 NA 4.85 25 0.29 <0.1 <0.2 40 0.625 <5 <0.3 15 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-10 04/12/2016 2.44 0.104 NA 1.33 <1 NA 4.15 24 0.43 <0.1 <0.2 46 0.595 <5 <0.3 14 1.17 <3 <0.00005 <0.00005 <0.00005 <0.0002 NA NA NA NA NA NA NA NA NA NA AMW-3A 11/04/2014 <1 NA NA 2.45 <1 <1 6.54 NA NA NA <0.2 NA NA NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA AMW-3A 05/12/2015 <1 0.071 NA 8.77 <1 NA 7.7 1220 0.34 <0.1 <0.2 500 0.352 <5 8.98 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 11/17/2010 <5 NA 0.51 NA <10 NA NA NA <5 NA <0.1 <25 NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 04/12/2011 <5 NA 0.43 NA <10 NA NA NA <5 NA <0.1 <25 NA NA NA 43.9 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 07/19/2011 53 B NA 0.43 NA <10 NA NA NA <5 NA <0.1 <25 NA NA NA 32.4 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 11/09/2011 12 NA 0.42 NA <10 NA NA NA <5 NA <0.1 93 NA NA NA 56.8 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 04/10/2012 <5 NA 0.41 NA <10 NA NA NA <5 NA <0.1 <25 NA NA NA 11 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 07/16/2012 <5 NA 0.42 NA <10 NA NA NA <2 NA <0.1 <25 NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 11/15/2012 <5 NA 0.36 NA <10 NA NA NA <2 NA <0.1 <25 NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 04/03/2013 10 NA 0.43 NA <1 NA NA NA <0.1 NA <0.2 <10 NA NA NA 10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 07/01/2013 <5 NA 0.42 NA 1.22 NA NA NA <0.1 NA <0.2 <25 NA NA NA 19 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 11/05/2013 <5 NA 0.42 NA <1 NA NA NA 0.15 NA <0.2 <25 NA NA NA 25 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 04/16/2014 <5 NA 0.42 NA <1 NA NA NA 0.18 NA <0.2 <25 NA NA NA 14 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 07/09/2014 <5 NA 0.45 NA <1 NA NA NA 0.12 NA <0.2 <25 NA NA NA 28 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 11/03/2014 <5 NA 0.4 NA <1 NA NA NA 0.17 NA <0.2 <25 NA NA NA 12 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 04/07/2015 <5 NA 0.42 0.548 <1 NA 1.04 NA 0.36 NA <0.2 31 NA <5 NA 22 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 07/06/2015 <5 0.423 1.8 0.409 <1 NA 0.993 <5 0.61 <0.1 <0.2 <25 0.106 <5 <0.3 77 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 11/03/2015 <5 0.29 1.3 0.695 <1 NA 0.893 B2 <5 0.4 NA <0.2 <25 NA 130 3.03 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 DUP 11/03/2015 6 0.29 1.3 0.678 <1 NA 0.894 <5 0.54 NA <0.2 <25 NA 120 3.21 27 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 12/08/2015 1.4 0.33 NA <5 <0.5 NA <5 <5 <1 <0.1 <0.1 33 <1 8.7 <1 25 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 01/20/2016 1.53 0.436 NA 0.373 <1 NA 1.03 <5 <0.1 <0.1 <0.2 <25 0.101 <5 <0.3 20 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1 04/07/2016 <5 0.399 1.8 0.469 <1 NA 1.17 <5 0.35 <0.1 <0.2 <25 0.121 10 <0.3 17 14.4 <3 <0.00005 <0.00005 <0.00005 <0.0002 NA NA NA NA NA NA NA NA NA NA CB-9 11/15/2012 <5 NA 0.38 NA <10 NA NA NA <2 NA 0.12 <25 NA NA NA 19.6 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 04/03/2013 <5 NA 0.33 NA <1 NA NA NA 0.2 NA <0.2 42 NA NA NA 18 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 07/01/2013 6 NA 0.33 NA 1.12 NA NA NA 0.11 NA <0.2 26 NA NA NA 16 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 11/05/2013 <5 NA 0.34 NA <1 NA NA NA 0.21 NA <0.2 28 NA NA NA 19 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 04/16/2014 <5 NA 0.33 NA <1 NA NA NA 0.13 NA <0.2 <25 NA NA NA 14 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 07/09/2014 <5 NA 0.35 NA <1 NA NA NA 0.12 NA <0.2 28 NA NA NA 11 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 11/03/2014 <5 NA 0.29 NA <1 NA NA NA 0.14 NA <0.2 26 NA NA NA 13 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 04/07/2015 <5 NA 0.29 0.76 <1 NA 4.1 NA 0.24 NA <0.2 35 NA 6 NA 15 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 07/06/2015 <5 <0.01 1.2 0.704 <1 NA 4.06 8 0.11 <0.2 <0.2 25 0.158 <5 <0.3 37 NA NA NA NA NA NA <5 31.3 NA NA NA NA NA NA NA NA CB-9 09/09/2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 11/02/2015 <5 0.25 1.1 0.834 <1 NA 4.07 8 0.36 NA <0.2 <25 NA 40 1.33 21 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 12/08/2015 1.2 0.28 NA <5 <0.5 NA <5 7 <1 <0.1 <0.1 43 <1 6.1 <1 <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 DUP 12/08/2015 1.3 0.27 NA <5 <0.5 NA <5 7.1 <1 <0.1 <0.1 60 D6 <1 <2.6 <1 <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 01/21/2016 1.28 0.256 NA 0.689 <1 NA 3.89 7 0.14 <0.1 <0.2 <25 0.143 <5 <0.3 11 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 04/06/2016 <5 0.251 1.2 0.774 <1 NA 4 7 0.25 <0.1 <0.2 <25 0.161 7 0.763 17 1.8 2.18 <0.00005 <0.00005 <0.00005 0.00124 NA NA NA NA NA NA NA NA NA NA CB-9SL 04/27/2015 2.13 0.086 NA 1.41 <1 NA 8.54 40 0.74 <0.5 <0.2 92 0.397 110 0.56 49 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9SL 05/28/2015 <1 0.206 NA 1.28 <1 NA 4.15 28 0.57 <0.2 <0.2 43 0.209 6 <0.3 12 NA NA NA NA NA NA 14.6 17.2 80 5.07 NA NA NA NA NA NA CB-9SL 09/08/2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9SL 12/08/2015 0.77 0.3 NA <5 <0.5 NA <5 28 <1 <0.1 <0.1 93 <1 5.2 <1 <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9SL 01/21/2016 <1 0.262 NA 2.02 <1 NA 3 30 0.24 <0.1 <0.2 41 0.152 <5 <0.3 22 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9SL 04/13/2016 <1 0.262 NA 1.98 <1 NA 3.25 24 0.25 <0.1 <0.2 54 0.147 <5 <0.3 9 1.26 <3 <0.00005 <0.00005 <0.00005 <0.0002 NA NA NA NA NA NA NA NA NA NA MW-24S 05/11/2015 1.16 1.2 NA 1.61 <1 NA 3.48 37 0.49 <0.1 <0.2 54 0.307 <5 <0.3 8 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-24S 06/01/2015 1.07 1.2 NA 1.54 <1 NA 3.25 36 0.62 <0.1 <0.2 66 0.211 <5 <0.3 <5 5.78 <3 <0.00005 <0.00005 <0.00005 <0.0002 39.5 19.8 133 2.07 NA NA NA NA NA NA MW-24S 09/02/2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-24S 12/08/2015 0.75 1.3 NA <5 <0.5 NA <5 35 <1 <0.1 <0.1 72 <1 <3.1 <1 <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-24S 01/19/2016 1.02 1.1 NA 1.49 <1 NA 3.31 37 0.66 <0.1 <0.2 36 0.193 <5 <0.3 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-24S 04/12/2016 1.04 1.2 NA 1.54 <1 NA 3.38 228 0.74 <0.1 <0.2 63 0.214 <5 <0.3 232 1.76 <3 <0.00005 <0.00005 <0.00005 0.000168 j NA NA NA NA NA NA NA NA NA NA MW-24S DUP 04/12/2016 1.05 1.2 NA 1.54 <1 NA 3.34 40 0.78 <0.1 <0.2 57 0.207 <5 <0.3 <5 2.54 3.42 <0.00005 <0.00005 <0.00005 <0.0002 NA NA NA NA NA NA NA NA NA NA Analytical Parameter Reporting Units 15A NCAC 02L Standard Analytical Results Surficial Alluvial Saprolite TABLE 1-7 BACKROUND ANALYTICAL RESULTS THROUGH CSA ROUND 5 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-7 BG Analytical Results.xlsx Page 3 of 4 pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Alkalinity Aluminum Antimony Arsenic Barium Beryllium Bi- carbonate Alkalinity Boron Cadmium Calcium Carbonate Alkalinity Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Methane Molybdenum S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE NE NE 1*10 700 4*NE 700 2 NE NE 250 0.07^0.07^10 1*1000 300 15 NE 50 1 NE NE Sample ID Sample Collection Date Field Parameters 15A NCAC 02L Standard Reporting Units Analytical Parameter Analytical Results CB-1D 04/28/2015 6.7 38.22 17 75 1.56 1 206 7.52 <0.5 26 266 <1 <1 24 <1 26 <50 <1 5.12 <10 1.3 NA NA 7.04 2.54 <1 528 <1 1.11 226 <0.05 <10 1.38 CB-1D 05/21/2015 6.4 38.36 16 57 0.8 48 253 2.83 0.5 20 85 <1 <1 18 <1 20 <50 <1 3.72 <10 1.1 NA NA 1.27 1.66 <1 589 <1 1.12 286 <0.05 <10 <1 CB-1D 09/08/2015 5.8 38.92 16 30 2.87 122 327 2.36 NM NA NA NA NA NA NA NA NA NA NA NA NA NA 0.013 j NA NA NA NA NA NA NA NA NA NA CB-1D 12/08/2015 6.4 39.34 15 39 1.5 -67 138 3.26 NM 9.8 <100 <0.5 <0.5 13 <0.2 9.8 <50 <0.08 2 <5 1.2 <0.03 NA 2.4 2.6 1.5 610 0.11 1.02 180 <0.2 <10 <0.5 CB-1D 01/20/2016 5.8 37.24 13 31 2.12 115 320 3.67 0 7.8 94 <1 <1 11 <1 7.8 <50 <1 1.53 <5 0.83 <0.03 NA 1.83 2.34 <1 269 <1 0.873 151 <0.05 <10 <1 CB-1D 04/13/2016 5.6 34.08 15 36 3.17 91 296 4.08 NM 7.7 275 <1 <1 13 <1 7.7 <50 <1 1.66 <5 0.91 <0.03 NA <1 3.08 <1 231 <1 1.08 93 <0.05 <10 <1 AMW-3B 07/23/2014 6.5 7.97 18 88 2.89 163 NM 10.8 NM 37 NA <1 <1 11 NA NA <50 <1 6.46 NA 0.58 NA NA <5 <5 <5 131 <1 1.8 17 <0.05 NA 1.04 AMW-3B 11/04/2014 NM NM NM NM NM NM NM NM NM NA 259 <1 <1 8 <1 NA NA <1 7.22 B2 NA NA NA NA <1 <1 <1 258 <1 1.97 102 NA NA NA AMW-3B 05/12/2015 7.7 8.27 16 83 0.84 -69 136 6.86 <0.5 33 113 <1 <1 7 <1 33 <50 <1 6.14 <10 <2.5 NA NA <1 <1 <1 47 <1 1.86 <5 <0.05 <10 <1 AMW-3B 12/08/2015 6.1 8.24 14 73 4.3 40 245 8.56 0 33.8 <100 <0.5 <0.5 7.9 <0.2 33.8 <50 <0.08 6.62 <5 <1 0.21 NA <0.5 <0.5 <1 <50 <0.1 1.94 <5 <0.2 <10 <0.5 AMW-3B 01/20/2016 6.5 8.09 10 71 4.42 62 267 3.26 0 31.8 47 <1 <1 7 <1 31.8 <50 <1 6.15 <5 0.61 0.18 NA <1 <1 <1 20 <1 1.85 <5 <0.05 <10 <1 AMW-3B 04/12/2016 6.4 8.05 14 71 4.6 69 274 1.78 NM 33.1 17 <1 <1 7 <1 33.1 <50 <1 6.07 <5 0.6 0.18 NA <1 <1 <1 <10 B2 <1 1.83 <5 <0.05 <10 <1 CB-9BR 04/27/2015 8.9 44.46 16 185 0.49 123 328 16.2 <0.5 76 405 <1 <1 26 <1 76 <50 <1 24.7 <10 6.4 NA NA 8.25 <1 1.16 460 <1 2.53 21 <0.05 <10 7.4 CB-9BR 05/28/2015 6.5 48.57 16 135 0.36 69 274 10.8 <0.5 54 160 <1 <1 33 <1 54 <50 <1 16.1 <10 6.4 NA 0.014 <1 <1 <1 402 <1 3.2 76 <0.05 <10 1.17 CB-9BR 09/08/2015 6.3 49.19 17 105 0.84 133 338 9.89 NM NA NA NA NA NA NA NA NA NA NA NA NA NA 0.12 NA NA NA NA NA NA NA NA NA NA CB-9BR 12/08/2015 6.6 47.95 14 100 0.55 65 270 7.06 NM 39.2 <100 <0.5 <0.5 L3 20 <0.2 39.2 <50 <0.08 11.3 <5 6.1 0.092 NA 1.1 <0.5 <1 460 <0.1 3.27 46 <0.2 <10 <0.5 CB-9BR 01/21/2016 6.4 47.30 10 99 0.7 63 268 8.3 0 38.3 80 <1 <1 20 <1 38.3 <50 <1 10.5 <5 6.4 0.068 NA 9.08 <1 <1 678 <1 3.02 70 <0.05 <10 <1 CB-9BR 04/13/2016 6.1 46.93 15 98 0.52 57 262 8.71 NM 38 46 <1 <1 22 <1 38 <50 <1 9.4 <5 6.1 0.083 NA 1.3 <1 <1 557 <1 3.03 57 <0.05 <10 <1 Prepared by: BER Checked by: TDP Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. Spec Cond = Specific Conductance Deg C = Degrees Celsius NTU = Nephelometric turbidity unit umhos/cm = Micro mhos per centimeter DUP = Duplicate ug/L = Microgram per liter NE = Not established ORP = Oxidation Reduction Potential S.U. = Standard Unit mg/L = Milligram per liter DO = Dissolved oxygen NM = Not measured ft = Feet mV = Millivolts Temp = Temperature mg - N/L = Milligram nitrogen per liter NA = Not analyzed Eh = Redox Potential pCi/l = picocuries per liter < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. B = Target analyte detected in method blank at or above the reporting limit. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. D6 = The relative percent difference (RPD) between the sample and sample duplicate exceeded laboratory control limits. L1 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. M1 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable. Red text indicates the sample was not used in determination of PBCs Bedrock Transition Zone TABLE 1-7 BACKROUND ANALYTICAL RESULTS THROUGH CSA ROUND 5 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-7 BG Analytical Results.xlsx Page 4 of 4 Nickel Nitrate (as N)Nitrate Potassium Selenium Silver Sodium Strontium Sulfate Sulfide Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids Vanadium Zinc Radium-226 Radium-228 Uranium-233 Uranium-234 Uranium-236 Uranium-238 Fe(II)Fe(III)Mn(II)Mn(IV)Se(IV)Se(VI)SeCN MeSe(IV)SeMe Se (UK) ug/L mg-N/L mg/L mg/L ug/L ug/L mg/L ug/L mg/L mg/L ug/L mg/L mg/L mg/L ug/L ug/L pCi/l pCi/l ug/mL ug/mL ug/mL ug/mL ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 100 10 10 NE 20 20 NE NE 250 NE 0.2*500 NE NE 0.3*1000 NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE Sample ID Sample Collection Date Analytical Parameter Reporting Units 15A NCAC 02L Standard Analytical Results CB-1D 04/28/2015 6.03 0.036 NA 1.8 <1 NA 5.63 25 2.7 <0.2 <0.2 44 0.487 7 0.416 24 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1D 05/21/2015 2.07 0.038 NA 1.54 <1 NA 3.89 19 2.2 <0.1 <0.2 37 0.518 <5 0.34 20 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1D 09/08/2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1D 12/08/2015 3.7 0.11 NA <5 <0.5 NA <5 19 3.2 <0.1 <0.1 67 <1 <3.1 <1 18 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1D 01/20/2016 2.72 0.093 NA 0.861 <1 NA 1.78 14 3.2 <0.1 <0.2 <25 0.112 <5 <0.3 15 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1D 04/13/2016 4.97 0.165 NA 0.816 <1 NA 2.92 17 4.6 <0.1 <0.2 38 0.125 8 <0.3 15 2.9 <3 <0.00005 <0.00005 <0.00005 0.0000762 j NA NA NA NA NA NA NA NA NA NA AMW-3B 07/23/2014 <5 0.08 0.37 2.8 <1 NA 7.16 NA 1.7 NA <0.2 92 NA NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA AMW-3B 11/04/2014 1.67 NA NA 1.7 <1 <1 8.21 NA NA NA <0.2 NA NA NA NA 7 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA AMW-3B 05/12/2015 1.77 0.075 NA 2.06 <1 NA 6.07 60 3.3 <0.1 <0.2 72 1.4 8 0.344 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA AMW-3B 12/08/2015 1.2 0.3 NA <5 <0.5 NA 5.55 59 1.6 <0.1 <0.1 95 <1 3.3 <1 <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA AMW-3B 01/20/2016 <1 0.25 NA 1.57 <1 NA 5.05 58 1.3 <0.1 <0.2 47 0.221 <5 <0.3 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA AMW-3B 04/12/2016 <1 0.192 NA 1.63 <1 NA 5.18 56 1.1 <0.1 <0.2 67 <0.1 <5 <0.3 <5 7.41 <3 <0.00005 <0.00005 <0.00005 <0.0002 NA NA NA NA NA NA NA NA NA NA CB-9BR 04/27/2015 4.42 0.065 NA 4.23 1.56 NA 8.39 115 3.9 <0.2 <0.2 130 0.308 25 3.03 8 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9BR 05/28/2015 1.36 0.069 NA 3.41 <1 NA 4.76 98 1.8 <0.1 <0.2 96 0.204 8 0.499 21 NA NA NA NA NA NA 70 57.3 71.3 8.67 <0.12 <0.16 <0.072 <0.12 <0.12 <0.12 CB-9BR 09/08/2015 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9BR 12/08/2015 1.1 0.14 NA <5 <0.5 NA <5 68 1.4 <0.1 <0.1 83 <1 6.5 <1 <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9BR 01/21/2016 5.79 0.125 NA 2.55 <1 NA 3.47 71 1.2 <0.1 <0.2 76 0.325 11 <0.3 32 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9BR 04/13/2016 1.42 0.086 NA 2.41 <1 NA 3.48 65 1.5 <0.1 <0.2 82 0.16 <5 <0.3 8 3.46 1.46 <0.00005 <0.00005 <0.00005 0.000114 j NA NA NA NA NA NA NA NA NA NA Prepared by: BER Checked by: TDP Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. Spec Cond = Specific Conductance Deg C = Degrees Celsius NTU = Nephelometric turbidity unit umhos/cm = Micro mhos per centimeter DUP = Duplicate ug/L = Microgram per liter NE = Not established ug/mL = micrograms per milliliter S.U. = Standard Unit mg/L = Milligram per liter DO = Dissolved oxygen ORP = Oxidation Reduction Potential ft = Feet mV = Millivolts Temp = Temperature NM = Not measured NA = Not analyzed Eh = Redox Potential pCi/l = picocuries per liter mg - N/L = Milligram nitrogen per liter < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. B = Target analyte detected in method blank at or above the reporting limit. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. D6 = The relative percent difference (RPD) between the sample and sample duplicate exceeded laboratory control limits. L1 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. M1 = Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable. Red text indicates the sample was not used in determination of PBCs Transition Zone Bedrock TABLE 1-8 2016 CAMA MONITORING WELL SAMPLE LOCATIONS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Monitoring Well ID Geologic Unit Monitored Well Location Rationale Running Count ABMW-11BR Bedrock Separator dike between 1964 and 1982 ash basins NCDEQ requested well location (data gap well) to assess bedrock flow zone beneath ash basins.1 AMW-03B Bedrock Approx. 1800' southwest of 1982 basin, hydraulically upgradient Provide background data for statistically-derived site specific background concentrations in the bedrock flow zone.2 CB-01 Saprolite West of 1982 basin, hydraulically upgradient Provide background data for statistically-derived site specific background concentrations in the surficial flow zone.3 CB-01D Transition Zone West of 1982 basin, hydraulically upgradient Provide background data for statistically-derived site specific background concentrations in the surficial flow zone.4 CB-09BR Bedrock North of 1964 basin, hydraulically upgradient Provide background data for statistically-derived site specific background concentrations in the bedrock flow zone.5 CB-09SL Saprolite North of 1964 basin, hydraulically upgradient Provide background data for statistically-derived site specific background concentrations in the surficial flow zone.6 CB-09 Saprolite North of 1964 basin, hydraulically upgradient Provide background data for statistically-derived site specific background concentrations in the surficial flow zone.7 MW-10 Alluvial Approx. 1800' southwest of 1982 basin, hydraulically upgradient Provide background data for statistically-derived site specific background concentrations in the surficial flow zone.8 MW-11 Alluvial Approx. 900' northwest of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.9 MW-11D Transition Zone Approx. 900' northwest of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.10 MW-15A Alluvial Approx. 675' northwest of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.11 MW-15D Transition Zone Approx. 675' northwest of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.12 MW-16A Alluvial West of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.13 MW-16BR Bedrock West of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.14 MW-17A Alluvial West of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.15 MW-18BR Bedrock West of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.16 MW-18BRL Lower Bedrock West of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.17 MW-18D Transition Zone West of 1964 basin, east bank of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.18 MW-20A Alluvial Southwest of ash basins, wetlands west of I-26 and east of French Broad River Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.19 MW-21D Transition Zone South of 1982 basin, adjacent to west shoulder of I-26 East Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.20 MW-22BR Bedrock South of 1982 basin, adjacent to west shoulder of I-26 East Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.21 MW-22D Transition Zone South of 1982 basin, adjacent to west shoulder of I-26 East Provide further monitoring along transect parallel to the French Broad River and downgradient of the ash basins.22 MW-24S Saprolite Approx. 2100' northwest of 1982 basin, hydraulically upgradient of Lake Julian Provide background data for statistically-derived site specific background concentrations in the surficial flow zone.23 Prepared by: BDW Checked by: TDP File: P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-8 CAMA Monitoring Locations Page 1 of 1 TABLE 1-9 GROUNDWATER MONITORING PLAN (2016) ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC PARAMETER RL UNITS METHOD pH NA SU Field Water Quality Meter Specific Conductance NA µS/cm Field Water Quality Meter Temperature NA ºC Field Water Quality Meter Dissolved Oxygen NA mg/L Field Water Quality Meter Oxidation Reduction Potential NA mV Field Water Quality Meter Eh NA mV Field Water Quality Meter Turbidity NA NTU Field Water Quality Meter Aluminum 0.005 mg/L EPA 200.7 or 6010C Antimony 0.001 mg/L EPA 200.8 or 6020A Arsenic 0.001 mg/L EPA 200.8 or 6020A Barium 0.005 mg/L EPA 200.7 or 6010C Boron 0.05 mg/L EPA 200.7 or 6010C Chromium 0.001 mg/L EPA 200.7 or 6010C Cobalt 0.001 mg/L EPA 200.8 or 6020A Copper 0.001 mg/L EPA 200.8 or 6020A Hexavalent Chromium 0.00003 mg/L EPA 218.7 Iron 0.01 mg/L EPA 200.7 or 6010C Lead 0.001 mg/L EPA 200.8 or 6020A Manganese 0.005 mg/L EPA 200.7 or 6010C Mercury 0.00005 mg/L EPA 245.1 Molybdenum 0.001 mg/L EPA 200.8 or 6020A Nickel 0.001 mg/L EPA 200.8 or 6020A Selenium 0.001 mg/L EPA 200.8 or 6020A Strontium 0.005 mg/L EPA 200.7 or 6010C Thallium (low level)0.0002 mg/L EPA 200.8 or 6020A Vanadium (low level)0.0003 mg/L EPA 200.8 or 6020A Zinc 0.005 mg/L EPA 200.7 or 6010C Radium 226 1 pCi/L EPA 903.1 Modified Radium 228 3 pCi/L EPA 904.0/SW846 9320 Modified Uranium (233, 234, 236, 238)Varies by isotope µg/mL SW846 3010A/6020A Alkalinity (as CaCO3)20 mg/L SM 2320B Bicarbonate 20 mg/L SM 2320 Calcium 0.01 mg/L EPA 200.7 Carbonate 20 mg/L SM 2320 Chloride 0.1 mg/L EPA 300.0 or 9056A Hardness NA mg/L as CaCO3 EPA 130.1 Magnesium 0.005 mg/L EPA 200.7 or 6010C Nitrate + Nitrite 0.023 mg-N/L EPA 353.2 Potassium 0.1 mg/L EPA 200.7 Methane 0.01 mg/L RSK - 175 Sodium 0.05 mg/L EPA 200.7 Sulfate 0.1 mg/L EPA 300.0 or 9056A Sulfide 0.1 mg/L SM 4500 S2 D Total Dissolved Solids 25 mg/L SM 2540C Total Organic Carbon 0.1 mg/L SM5310C/EPA9060A Total Suspended Solids 2 mg/L SM 2450D Prepared by: JAW Checked by: BER Notes: FIELD PARAMETERS INORGANICS ANIONS/CATIONS/OTHER 1. Inorganics analyzed for total and dissolved (0.45 micron) concentrations. NA indicates not applicable. RADIONUCLIDES P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 1-9 Groundwater Monitoring Parameters 2016 Page 1 of 1 TABLE 2-1 DEQ GLOBAL CSA COMMENTS FOR DEP SITES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Number General Comment General Response to Comment 1 DEQ requests determination of 'provisional' background concentrations (for groundwater in particular). It is understood that until a sufficient background data set becomes available to do statistical analysis the term 'provisional background concentrations' will be used. Duke is to propose 'provisional background concentrations' and DEQ will determine background concentrations. Provisional background groundwater concentrations were provided in the CAP Part 1 reports. Updated provisional background groundwater concentrations are included in this CSA Supplement 1 report. 2 Provisional background concentrations should be determined for each flow zone (hydrostratigraphic unit) at each facility while considering similar subsurface geochemical conditions and site- specific conditions (e.g., oxic versus anoxic conditions). Provisional background concentrations were provided in the CAP Part 1 reports and presented for each media type (soil, sediment, surface water) and hydrogeologic flow zone. Updated provisional background groundwater concentrations are included in this CSA Supplement 1. 3 Geochemical controls (e.g., pH, DO, and Eh-redox) associated with contaminant migration should be considered in Site Conceptual Model. Eh maps similar to pH maps would be useful for this purpose. Geochemical controls were discussed in the CAP Part 1 and CAP Part 2 documents. PHREEQC geochemical modeling and pH/Eh maps were included in the discussion. 4 Some soil sample analytical detection limits were greater than the NC Soil Protection of Groundwater goals. Soil analysis method detection limits should be as close as possible to these values. Models and risk assessment evaluations used the method detection limit as a conservative approach when detection limits were greater than groundwater protection goals. The lab is aware of the need to use the lowest detection limit possible for soil samples. Soil matrix interference and other factors limit the technical practicality of achieving detection limits at or below the screening level values. 5 Source characterization evaluations should include primary and secondary soil source contributions (i.e., leaching of ash constituents onto soil, leaching of naturally occurring constituents from native soils, leaching due to changing geochemical conditions). Geochemical and fate and transport model evaluations provided in the CAP considered these mechanisms. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\ Table 2-1 DEQ Global Comments Page 1 of 4 TABLE 2-1 DEQ GLOBAL CSA COMMENTS FOR DEP SITES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Number General Comment General Response to Comment 6 COIs should be developed based upon results from pore water, groundwater and other media. Include hexavalent chromium as COI due to interest in water supply well results. Constituents exceeding the 2L standard have been included in the CAP. The risk assessment screening process is consistent with EPA's approach for determining the constituents that need to be evaluated ("Human and Ecological Risk Assessment of Coal Combustion Wastes," USEPA, April 2010, RIN 2050-AE81). Provisional background concentrations for hexavalent chromium in groundwater are being developed. 7 Groundwater results should be mapped and presented in cross- sectional view to the detection limit rather than just to 2L. Cross- sections should include geologic features and chemical contours. Discuss in text where difficult to contour due to background or other site conditions. The CSA Supplement 1 graphics address this comment. 8 Well construction and integrity should be considered when analyzing the groundwater data. Monitoring wells that exhibit high pH or turbidity should be redeveloped or replaced. Data from samples with >10NTUs should be screened prior to use in statistical analysis. In post-CSA activities, wells have been redeveloped or replaced as necessary. Turbid sample data (samples with turbidity >10 NTUs) have been screened from use in statistical analysis using professional judgement where samples may have been visually clear or the turbidity was close to 10 NTUs. 9 Address influence of ash impoundments on subsurface geochemistry and how that may influence contaminant distribution related to CCRs or cause metals to leach from native soils. Geochemical controls and PHREEQC geochemical modeling were discussed in the CAP Part 1 and CAP Part 2 documents. 10 Provide vertical gradient maps/figures illustrating flow paths, areas of recharge and discharge. Provide plan view map. Vertical gradient maps were included in the CAP Part 1 reports. 11 Show surface water features on base maps and cross-sections. Maps and cross-sections include surface water features where applicable. 12 Tabulate analytical results for water supply wells, including strontium, and provide information on maps. A map of the water supply wells sampled by DEQ and a tabulation of the most recent data is provided in this CSA Supplement 1 report. Maps and cross-sections showing the distribution of strontium are also provided within this supplemental report. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\ Table 2-1 DEQ Global Comments Page 2 of 4 TABLE 2-1 DEQ GLOBAL CSA COMMENTS FOR DEP SITES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Number General Comment General Response to Comment 13 Include analysis for total uranium, radium-226, and radium-228 in background, below ash basin, immediate downgradient, and other downgradient locations. Use Federal MCL for standard for Ra 226, Ra 228, and U. Key wells located in background, below ash basin, and downgradient of the ash basin have been sampled for total uranium, Ra 226, and Ra 228. These parameters are also included in the 2016 monitoring plan. 14 COPCs (or COI's) should be modeled using site specific Kd values or a technical basis provided as to why the modeling or site specific Kd for a parameter could not be conducted. The models should be "living entities" and updated as more information becomes available that could change or confirm the outcome of the models. Agreed, it is anticipated that the various models (i.e., geochemical, flow and transport) will be updated as additional data relevant to the models becomes available. 15 Appropriate PSRG for chromium is hexavalent chromium due to its toxicity drives the risk for the constituent. The PSRC for hexavalent chromium is being used in post -CSA reports for data comparison purposes. 16 Potential receptors identified as part of the risk assessment should include non-trespassing recreational users of surface water bodies such as boaters and water supply wells. Recreational users of surface water were identified as potential receptors and evaluated as part of the Risk Assessment provided in the CAP 2 reports. At most locations, water supply wells are not located downgradient of the facility and therefore the risk assessment considered the pathway incomplete. Where downgradient water supply wells were identified, the data was evaluated by Haley and Aldrich, Inc. in various reports (2015 and 2016). 17 For isoconcentration contour maps, provide contours for concentrations above the reporting limit/PQL. Use inferred (dashes) lines where appropriate. Revised isoconcentration maps with contour lines indicating concentrations above the reporting limit are included in this document. Where appropriate, inferred lines are used. 18 Data collected to support CSAs should be incorporated into maps, narratives and provided in CAPs (water supply, seep, SW, sediment, background). Data collected prior to CAMA activities should also be included. The requested information has been included in various reports including the CSA report, CAP Part 1, CAP Part 2, and this CSA Supplement 1 report. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\ Table 2-1 DEQ Global Comments Page 3 of 4 TABLE 2-1 DEQ GLOBAL CSA COMMENTS FOR DEP SITES ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Number General Comment General Response to Comment 19 2L exceedances related to naturally occurring conditions cannot be confirmed until, at a minimum, provisional background concentrations are determined. Dynamic redox and geochemical conditions can liberate naturally occurring metals (e.g., As, Fe, Mn) from soil and aquifer media. Noted. Initial provisional background concentrations were presented in the CAP Part 1 report based upon the data available at the time. Updated provisional background concentrations are presented in this CSA Supplement 1 report using 5 or 6 data sets as available. Duke anticipates at least 8 rounds of data from the new background wells will be used to statistically develop background concentrations. Geochemical modeling has been conducted to assess dynamic redox and geochemical conditions. 20 Surface water hydrology (e.g., wetlands, tributaries, etc.) as it relates to groundwater modeling or risk assessment considerations should be included in the CAP. A discussion of groundwater and surface water interaction was provided in the CAP Part 1 and site data was incorporated into the groundwater models. Stream information was incorporated in the modeling and risk assessments. Prepared by: JAW Checked by: KWW P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\ Table 2-1 DEQ Global Comments Page 4 of 4 TABLE 2-2 RADIOLOGICAL ANALYTICAL RESULTS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Radium 226 Radium 228 Total Radium Uranium 233 Uranium 234 Uranium 236 Uranium 238 Total Uranium pCi/L pCi/L ug/mL ug/mL ug/mL ug/mL ug/mL ------5 ------------0.03 Sample ID Sample Collection Date AMW-3B 04/12/2016 7.41 <3 7.41 <0.00005 <0.00005 <0.00005 <0.0002 <RL AMW-3B 07/08/2016 1.53 <1 1.53 <0.00005 <0.00005 <0.00005 <0.0002 <RL CB-1 04/07/2016 14.4 <3 14.4 <0.00005 <0.00005 <0.00005 <0.0002 <RL CB-1 07/05/2016 6.55 <1 6.55 <0.00005 <0.00005 <0.00005 0.000252 0.000252 CB-1 DUP 07/05/2016 NA NA NA NA NA NA NA NA CB-1D 04/13/2016 2.9 <3 2.9 <0.00005 <0.00005 <0.00005 0.0000762 j 0.0000762 j CB-1D 07/08/2016 1.3 <1 1.3 <0.00005 <0.00005 <0.00005 0.000241 0.000241 CB-1D DUP 07/08/2016 1.76 0.594 2.354 <0.00005 <0.00005 <0.00005 0.000131 j 0.000131 j CB-9 04/06/2016 1.8 2.18 3.98 <0.00005 <0.00005 <0.00005 0.00124 0.00124 CB-9 07/05/2016 1.49 <1 1.49 <0.00005 <0.00005 <0.00005 <0.0002 <RL CB-9 DUP 07/05/2016 NA NA NA NA NA NA NA NA CB-9BR 04/13/2016 3.46 1.46 4.92 <0.00005 <0.00005 <0.00005 0.000114 j 0.000114 j CB-9BR 07/12/2016 2.6 <1 2.6 <0.00005 <0.00005 <0.00005 <0.0002 <RL CB-9BR DUP 07/12/2016 1.21 <1 1.21 <0.00005 <0.00005 <0.00005 <0.0002 <RL CB-9SL 04/13/2016 1.26 <3 1.26 <0.00005 <0.00005 <0.00005 <0.0002 <RL CB-09SL 07/11/2016 1.3 <1 1.3 <0.00005 <0.00005 <0.00005 0.0000788 j 0.0000788 j MW-10 04/12/2016 1.17 <3 1.17 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-10 07/08/2016 0.787 <1 0.787 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-24S 06/01/2015 5.78 <3 5.78 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-24S 04/12/2016 1.76 <3 1.76 <0.00005 <0.00005 <0.00005 0.000168 j 0.000168 j MW-24S DUP 04/12/2016 2.54 3.42 5.96 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-24S 07/08/2016 1.09 <1 1.09 <0.00005 <0.00005 <0.00005 <0.0002 <RL ABMW-2 05/28/2015 0.695 1.91 2.605 <0.00005 <0.00005 <0.00005 0.0625 0.0625 MW-11 04/07/2016 1.31 2.19 2.19 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-11 07/08/2016 0.682 0.929 1.611 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-15A 04/07/2016 1.76 <3 1.76 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-15A 07/08/2016 1.2 <1 1.2 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-16A 04/08/2016 7.56 <3 7.56 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-16A 07/08/2016 0.621 1.11 1.731 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-17A 04/12/2016 0.891 2.37 3.261 <0.00005 <0.00005 <0.00005 0.0000945 j 0.0000945 j MW-17A 07/12/2016 1.96 <1 1.96 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-20A 04/13/2016 0.628 <3 0.628 <0.00005 <0.00005 <0.00005 <0.0002 <RL ABMW-2S 05/28/2015 0.701 <3 0.701 <0.00005 <0.00005 <0.00005 <0.001 <RL ABMW-7S 05/28/2015 1.79 <3 1.79 <0.00005 <0.00005 <0.00005 0.000102 j 0.000102 j GW-3 04/25/2016 1.49 <3 1.49 NA NA NA NA NA MW-11D 04/07/2016 3.53 <3 3.53 <0.00005 <0.00005 <0.00005 0.0000844 j 0.0000844 j MW-11D 07/08/2016 0.953 1.7 2.653 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-15D 04/08/2016 2.21 <3 2.21 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-15D 07/08/2016 1.13 0.696 1.826 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-18D 04/11/2016 0.747 <3 0.747 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-18D 07/07/2016 <1 0.523 0.523 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-21D 04/12/2016 2.35 2.63 4.98 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-21D 07/07/2016 0.417 0.852 1.269 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-22D 04/11/2016 0.497 1.33 1.827 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-22D 07/07/2016 1.02 <1 1.02 <0.00005 <0.00005 <0.00005 <0.0002 <RL Ash Pore Water Alluvial Saprolite Transition Zone Analytical Results Reporting Units Analytical Parameter Federal MCL Background P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 2-2 Radiological Analytical Results Page 1 of 2 TABLE 2-2 RADIOLOGICAL ANALYTICAL RESULTS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Radium 226 Radium 228 Total Radium Uranium 233 Uranium 234 Uranium 236 Uranium 238 Total Uranium pCi/L pCi/L ug/mL ug/mL ug/mL ug/mL ug/mL ------5 ------------0.03 Sample ID Sample Collection Date Analytical Results Reporting Units Analytical Parameter Federal MCL ABMW-11BR 04/14/2016 1.31 <3 1.31 <0.00005 <0.00005 <0.00005 0.0017 0.0017 ABMW-11BR 07/11/2016 0.739 <1 0.739 <0.00005 <0.00005 <0.00005 0.000357 0.000357 AS-9 05/12/2016 0.509 <3 0.509 <0.00005 <0.00005 <0.00005 0.000412 0.000412 AS-11 05/09/2016 0.728 3.14 3.868 <0.00005 <0.00005 <0.00005 <0.0002 <RL AS-13 05/09/2016 0.83 <3 0.83 <0.00005 <0.00005 <0.00005 <0.0002 <RL AS-14 05/11/2016 8.58 8.47 17.05 <0.00005 <0.00005 <0.00005 0.000765 0.000765 AS-20 06/06/2016 8.38 6.72 15.1 <0.00005 <0.00005 <0.00005 0.000614 0.000614 MW-16BR 04/08/2016 3.04 2.11 5.15 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-16BR 07/08/2016 1.14 1.33 2.47 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-18BR 04/11/2016 1.21 <3 1.21 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-18BR 07/07/2016 0.308 1.63 1.938 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-22BR 04/11/2016 4.85 1.4 6.25 <0.00005 <0.00005 <0.00005 <0.0002 <RL MW-22BR 07/07/2016 1.25 1.32 2.57 <0.00005 <0.00005 <0.00005 <0.0002 <RL Prepared by: BER Checked by: TDP Notes: - Concentration greater than the Federal MCL (https://www.epa.gov/sites/production/files/2016-06/documents/npwdr_complete_table.pdf) RL = reporting limit pCi/L = picocuries per liter ug/mL = micrograms per milliliter NA = Not Analyzed Dup = Duplicate < = concentration not detected at or above reporting limit j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. Bedrock P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 2-2 Radiological Analytical Results Page 2 of 2 TABLE 2-3 NCDEQ SITE SPECIFIC COMMENTS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Number General Comment General Response to Comment 1 NC DEQ requested background monitoring wells AMW-3A, CB-1BR and MW-24BR be replaced. Groundwater in AMW-3A has elevated pH values (>10), possibly the result of grout intrusion into the well during installation activities, and thus may not represent groundwater quality. To address this concern, aggressive redevelopment of AMW-3A was performed, yet unsuccessful at reducing the elevated pH. As a result, AMW-3A will not be included in the list of site background wells. Monitoring wells CB-1BR and MW-24BR are screened across bedrock fractures that yield little to no water and cannot be sampled. To address these concerns, a deeper bedrock well, CB-01BRL, was drilled 328 feet below ground surface at the location of CB-1BR. No water-bearing or significant fracture zones were observed at CB-01BRL. CB-01BRL was completed as an open borehole and is considered a piezometer. Monitoring well MW-24BR was installed directly adjacent to Heywood Road during initial assessment activities. The installation of the MW-24 well pair occupies the only accessible area at this location. The bedrock fractures captured in the screened zone at MW-24BR yield insufficient water to obtain a viable sample, however can be used as a piezometer. Therefore, MW-24BR will not be included in the list of site background wells. 2 NC DEQ requests hexavalent chromium be added as a potential constituent of interest and be analyzed for in groundwater samples due to interest in water supply well results. Groundwater at monitoring wells along flow transects were first sampled for hexavalent chromium in December 2015 and continue to be sampled for throughout 2016. Sampling results for chromium (VI) speciation at monitoring wells were included in Table 2-10 of the CAP Part 1. Site wide sampling for hexavalent chromium was first conducted in December 2015 and continues to be sampled at background wells and select downgradient well locations throughout 2016. Subsequent to the CAP Part 2 submittal on February 19, 2016, a comprehensive data table including hexavalent chromium sample results was submitted to the Asheville Regional Office. 3 NC DEQ requests groundwater samples be collected and analyzed for radionuclides (total uranium, radium-226, and radium-228) at background wells, wells screened below the ash basins, wells stationed immediately downgradient from the ash basins as well as other downgradient locations. See response #13 in Table 2-1. 4 NC DEQ requested expanded information on site geologic heterogeneities and how this information will be accounted for in the groundwater flow and transport model. Site heterogeneities were accounted for and discussed in the Groundwater Flow and Transport Model for the Asheville Steam Electric Plant included in Appendix D of the CAP Part 1 (Falta et. al, 2015). Site heterogeneities and updates to this report are also discussed in Section 4 and Appendix B of the CAP Part 2 submitted February 19, 2016. 5 NCDEQ requested a list of locations with an ion charge balance greater than 10 percent difference and indicates which of these locations were not included on piper diagrams. Included in the CSA is Table 10-6 – Charge Balance Summary, which reports the percent difference in ion charge balance for all site monitoring wells and surface water and seep samples. Section 10.4.5 of the CSA states “Samples with electrochemical charge balances within 10 percent were plotted and are included in Figure 10-65 through Figure 10-69.” 6 NC DEQ requested a map portraying a winter view of site wide water levels.Figure 2-1 and Figure 2-2 of the CAP Part 2 depicts surficial and bedrock site wide water levels measured in December 2015. 7 NC DEQ requested further assessment of the bedrock flow zone beneath the 1982 ash basin. To further assess the bedrock flow zone beneath the 1982 ash basin, monitoring well ABMW-11BR was installed between the 1964 and 1982 ash basins and screened across a wide interval (136 feet to 156 feet) of slightly weathered bedrock. Groundwater at ABMW-11BR was initially sampled in April 2016 (results included in Appendix A of this report). A second sample was collected from ABMW-11BR in July 2016. Further assessment of the bedrock flow zone beneath the 1982 basin indicates dewatering of the basin has influenced bedrock groundwater elevations as evident by the approximate depth to water of 133 feet below ground surface at ABMW-11BR (January 2016). 8 NC DEQ requested horizontal gradients calculated along selected flow paths be reviewed and revised. Updated horizontal groundwater gradients along selected flow paths are provided in Table 3-1 in the CAP Part 1 submitted November 20, 2015. 9 NC DEQ requested all surface water data should be included in discussions.Evaluation of surface water and sediment constituent background concentrations in addition to discussion of the extent of 2L exceedances within surface water are included in CAP Part 1 submitted November 20, 2015. Surface water and sediment features and data are included in The Groundwater Flow and Transport Model provided in Appendix D of the CAP Part 1. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 2-3 Site Specific NCDEQ Comments Rev III_7_31_2016 Page 1 of 3 TABLE 2-3 NCDEQ SITE SPECIFIC COMMENTS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Number General Comment General Response to Comment 10 Ash leachate that sorbs to soils at a downgradient location should be considered a source. Secondary sources are being evaluated as a part of 1982 basin closure, including additional constituent modeling via SPLP analysis. 11 NC DEQ requested the continuous discharge of seeps along Interstate 26 and their implications for transport and risk be addressed. Seeps along Interstate 26 are addressed in Section 3 of the CAP Part 1 submitted November 20, 2015. Evaluation of these seeps and their potential human health and ecological risks are included in the Baseline Human Health and Ecological Risk Assessment for the Asheville Steam Electric Plant (Appendix F of the CAP Part 2 submitted February 19, 2016). 12 NC DEQ stated it was unclear which soil/ ash samples were analyzed using SPLP in CSA. NC DEQ requested that the Corrective Action Plan clarify which samples were analyzed using analyzed using SPLP. Analytical results summarizing ash and soil SPLP analysis were provided in Table 7-5 and Table 8-6 of the CSA. SPLP vs. Soil concentrations were plotted for select constituents and are included in Appendix A of the CAP Part 1. 13 NC DEQ stated that vertical hydraulic gradients calculated across the site indicate the Site Conceptual Model is incomplete and suggested incorporating a discussion of vertical hydraulic gradients into the Site Conceptual Model. A map of vertical hydraulic gradients is provided as Figure 3-3 in the CAP Part 1. Additional discussion of vertical hydraulic gradients and groundwater flow is included in the Groundwater Flow and Transport Modeling Report included in Appendix D of the CAP Part 1. The Site Conceptual Model will continue to be refined as new information is provided. 14 NC DEQ requested a summary narrative describing potential source areas (e.g., 1964 and 1982 ash basins, W.E. basins, settling pond and constructed wetlands) and other hydrogeologic uncertainties be incorporated into the Site Conceptual Model. A description of potential source areas in addition to other hydrogeologic uncertainties were incorporated into the Site Conceptual Model provided in the CAP Part 2 submitted February 19, 2016. 15 NC DEQ requested additional modeling be conducted and included in the CAP Part 2 or CSA Supplement. An updated Analysis of Geochemical Phenomena Controlling Mobility of Ions from Coal Ash Basins was included in Appendix C of the CAP Part 2 submitted February 19, 2016. Modeling of manganese was also provided in Section 3 and Appendix A of the CAP Part 2. 16 NC DEQ requested that the exact flow paths to be modeled should be portrayed on cross-sections through source to receptor corridors. A three-dimensional flow and transport model was constructed and described in the Groundwater Flow and Transport Modeling Report provided in Appendix D of the CAP Part 1 submitted November 20, 2016. The geochemical model was developed utilizing a composite database of constituent concentrations and includes the range of pH/ Eh conditions encountered across all seven Duke Energy Progress sites. Further description of this framework is documented in the report, Analysis of Geochemical Phenomena Controlling Mobility of Ions from Coal Ash Basins, provided in Appendix C of the CAP Part 2 submitted February 19, 2016. 17 NC DEQ requested that Batch geochemical and transport modeling from sources to receptors include the 1964 and 1982 ash basins, W.E. basins, settling pond and constructed wetlands as well as other potential source areas (e.g., coal pile) with flow paths through areas of highest concentration and that this information be included in the human health and ecological risk assessment. The Human Health Risk Assessment was included in Appendix F of the CAP Part 2. Additional geochemical modeling is currently under review. 18 NC DEQ requested additional assessment be conducted to address concerns of underflow occurrence at the unnamed tributary south of the 1982 ash basin as well as the French Broad River. A water line has been installed along Bear Leah Trail. As part of the water line installation, all private wells in the area have been abandoned as of March 5, 2016. Prior to well abandonment, these wells underwent a full suite of geophysical logs including fluid temperature and resistivity, 3-arm caliper, SPR, acoustic televiewer, and heat pulse flowmeter. Geophysical logs were performed under ambient and pumping conditions. Additional field work performed to further assess potential underflow of the French Broad River included the installation of a deep bedrock well at the MW-18 cluster. MW-18BRL was installed to investigate the presence of fractures at a depth below the base of the French Broad. To further understand groundwater movement in the area, a full suite of geophysical logs were conducted at MW-18BRL. Groundwater was also sampled at MW-18BRL to further evaluate groundwater chemistry in the area. To further assess potential underflow of the French Broad River, well inspections and borehole geophysics were conducted at five private water supply wells stationed west of the French Broad where Duke Energy is currently providing bottled water. All borehole geophysical data conducted during the assessment have been compiled and evaluated within the current document. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 2-3 Site Specific NCDEQ Comments Rev III_7_31_2016 Page 2 of 3 TABLE 2-3 NCDEQ SITE SPECIFIC COMMENTS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Number General Comment General Response to Comment 19 NC DEQ requested groundwater samples be collected from select wells and analyzed for isotopic signatures for suite of constituents (e.g., boron and strontium) that provide insight into potential ash pore water and groundwater mixing. Isotopic analysis of groundwater samples collected from select wells has been completed and is discussed in Section 3.3.3. 20 NC DEQ requested that apparent grout contamination at wells AMW-3A, CB-09BR and MW-2BR be addressed. To address possible grout contamination at wells AMW-3A, CB-09BR and MW-2BR, aggressive redevelopment was performed. Redevelopment of AMW-3A was unsuccessful in reducing groundwater pH; therefore, AMW-3A will not be included in the list of background monitoring wells. Monitoring well MW-2BR was abandoned to facilitate the removal of ash from the 1982 basin. Replacement of this well is not feasible at this location due to ongoing and future activities. Monitoring well CB-09BR was sampled in December 15, 2015 and yielded a pH of 6.6. Possible grout contamination is no longer considered an issue at this well. 21 NC DEQ requested that seep and surface water locations with constituent concentrations in excess of 2L are investigated. Evaluation of constituent background concentrations for surface water and sediment as well as discussion of the extent of constituent concentrations in excess of 2L within surface water are included in the CAP Part 1 submitted November 20, 2015. Evaluation of surface water and sediment data is also included in The Baseline Human Health and Ecological Risk Assessment for the Asheville Steam Electric Plant provided as Appendix F in the CAP Part 2 submitted February 19, 2016. Areas where constituent concentrations are elevated above 2L were factored into the development of isoconcentration maps provided in the CAP Part 1. 22 What are the implications associated with high-end hydraulic conductivities of 3,266 ft/year? See Errata Section. 24 NC DEQ requested a map contouring Eh. Eh contour maps have been constructed for each hydrogeologic unit and were provided as Figure 3-4 through Figure 3-8 in the CAP Part 1 submitted November 20, 2015. Updated Eh contour maps are provided as Figure 1-9 through Figure 1- 11 in the current report. 25 NC DEQ requested strontium isoconcentration maps.Strontium isoconcentration maps have been constructed for each hydrogeologic unit and were provided as Figure 3-29 through Figure 3-33 in the CAP Part 1 submitted November 20, 2015. Updated strontium isoconcentration maps are provided as Figure 1-42 through Figure 1-44 in the current report. 26 NC DEQ requested updated water supply well data.Updated water supply well data are provided in Table 1-1. 27 NC DEQ requested a summary of constituents of interest (COIs) in background wells at the Asheville Plant. A summary of COIs in background wells at the Asheville Plant is provided in Table 1-7. 28 NC DEQ requests a summary of statistically derived COIs for the Asheville Plant.A summary of statistically derived COIs for the Asheville Plant are provided as Table 2-1 through Table 2-9 in the CAP Part 1 submitted November 20, 2015. Statistical derivation of background concentrations is an ongoing process. Prepared by: JHG Checked by: BDW P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 2-3 Site Specific NCDEQ Comments Rev III_7_31_2016 Page 3 of 3 TABLE 3-1 SURFACE WATER ANALYTICAL RESULTS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 3-1 SW Analytical Results.xlsx Page 1 of 3 Aluminum Aluminum Antimony Antimony Arsenic Arsenic Barium Barium Beryllium Beryllium Boron Boron DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT S.U.Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L NA NE NE NE NE NE NE NE NE 8000 NE 640 NE 10 NE 200000 NE NE NE NE NE 6.0-9.0 29 NE 5 NE NE 50 NE NE 87 NE NE 150 NE NE NE 6.5 NE NE NE NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE 1*NE 10 NE 700 NE 4*NE NE 700 Sample ID Sample Collection Date SW-100 05/11/2016 6.5 15 90 4.07 88 293 54.8 28 55 215 <1 <1 <1 <1 39 41 <1 <1 28 <50 <50 SW-101 05/11/2016 6.7 20 0 7.59 525 730 2.92 10 11 264 <1 <1 <1 <1 39 40 <1 <1 10 <50 <50 SW-102 05/11/2016 6.2 20 87 4.46 209 414 40.7 15.2 6 1890 <1 <1 <1 <1 35 46 <1 <1 15.2 <50 <50 SW-103 05/11/2016 6.5 17 26 8.21 209 414 12.7 6.5 19 752 <1 <1 <1 <1 20 27 <1 <1 6.5 <50 <50 SW-104 05/12/2016 6.2 16 55 6.15 208 413 19.6 12.3 218 2190 <1 <1 <1 <1 24 32 <1 <1 12.3 <50 <50 Prepared by: BER Checked by: TDP Notes: - Total metal concentration greater than the 15A NC 02B/EPA Human Health Criteria, 2016(NC), 2016(EPA). - Total metal concentration greater than the 15A NC 02B/EPA Ecological Criteria, 2016(NC), 2016(EPA). - Total metal concentration greater than the 15A NC 02L Standard, Appendix 2, April 1, 2013. S.U. = Standard Unit DIS = Dissolved mV = Millivolt Temp = Temperature TOT = Total mg/L = milligrams per liter Spec Cond = Specific Conductance NE = Not Established ug/L = micrograms per liter DO = Dissolved Oxygen Deg C = Degrees Celsius mg-N/L = milligrams nitrogen per liter ORP = Oxidation Reduction Potential NTU = Nephelometric Turbidity Unit umhos/cm = micro mhos per centimeter Eh = Redox Potential ^ = NC DHHS Health Screening Level. < = Concentration not detected at or above the reporting limit. * = Interim Maximum Allowable Concentration (IMAC) of the 15A NCAC 02L Standard, Appendix 1, April 2013. H1 = Analysis conducted outside the EPA method holding time. Analytical Parameter Field Parameters TurbidityEhORPDOSpec CondTemppH 15A NCAC 02L Standard 15A NCAC 02B/EPA Ecological 15A NCAC 02B/EPA Human Health Reporting Units Bi- carbonate Alkalinity Alkalinity Analytical Results TABLE 3-1 SURFACE WATER ANALYTICAL RESULTS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 3-1 SW Analytical Results.xlsx Page 2 of 3 Cadmium Cadmium Calcium Chromium Chromium Cobalt Cobalt Copper Copper Iron Iron Lead Lead Magnesium Manganese Manganese Mercury Mercury DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT ug/L ug/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L NE NE NE NE NE NE NE NE NE 4 NE NE NE NE NE NE NE NE NE NE NE 0.15 NE NE NE 230 11 35 NE NE NE 2.7 NE NE NE 0.54 NE NE NE NE NE 0.012 NE 2 NE NE 250 0.07^NE 10 NE 1*NE 1000 NE 300 NE 15 NE NE 50 NE 1 Sample ID Sample Collection Date SW-100 05/11/2016 <1 <1 7.92 <5 2 <0.6 <1 <1 4.3 4.63 <1 <1 1700 4060 <1 <1 2.84 703 748 <0.05 <0.05 SW-101 05/11/2016 <1 <1 5.42 <5 6.1 0.22 <1 <1 <1 <1 <1 <1 <10 281 <1 <1 2.52 10 15 <0.05 <0.05 SW-102 05/11/2016 <1 <1 6.06 <5 6.2 <0.6 <1 <1 1.23 1.76 <1 <1 95 2500 <1 <1 2.53 301 330 <0.05 <0.05 SW-103 05/11/2016 <1 <1 1.38 <5 1 0.038 <1 <1 <1 <1 <1 <1 53 1070 <1 <1 0.726 28 54 <0.05 <0.05 SW-104 05/12/2016 <1 <1 3.36 <5 3 0.042 <1 1.1 <1 <1 <1 1.35 282 1100 <1 <1 1.56 34 39 <0.05 <0.05 Prepared by: BER Checked by: TDP Notes: - Total metal concentration greater than the 15A NC 02B/EPA Human Health Criteria, 2016(NC), 2016(EPA). - Total metal concentration greater than the 15A NC 02B/EPA Ecological Criteria, 2016(NC), 2016(EPA). - Total metal concentration greater than the 15A NC 02L Standard, Appendix 2, April 1, 2013. S.U. = Standard Unit DIS = Dissolved mV = Millivolt Temp = Temperature TOT = Total mg/L = milligrams per liter Spec Cond = Specific Conductance NE = Not Established ug/L = micrograms per liter DO = Dissolved Oxygen Deg C = Degrees Celsius mg-N/L = milligrams nitrogen per liter ORP = Oxidation Reduction Potential NTU = Nephelometric Turbidity Unit umhos/cm = micro mhos per centimeter Eh = Redox Potential ^ = NC DHHS Health Screening Level. < = Concentration not detected at or above the reporting limit. * = Interim Maximum Allowable Concentration (IMAC) of the 15A NCAC 02L Standard, Appendix 1, April 2013. H1 = Analysis conducted outside the EPA method holding time. Chromium (VI)Analytical Parameter Reporting Units 15A NCAC 02B/EPA Human Health 15A NCAC 02B/EPA Ecological 15A NCAC 02L Standard ChlorideCarbonate Alkalinity Analytical Results TABLE 3-1 SURFACE WATER ANALYTICAL RESULTS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 3-1 SW Analytical Results.xlsx Page 3 of 3 Molybdenum Molybdenum Nickel Nickel Potassium Selenium Selenium Sodium Strontium Strontium Thallium Thallium Vanadium Vanadium Zinc Zinc DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT ug/L ug/L ug/L ug/L ug/L mg-N/L mg/L ug/L ug/L mg/L ug/L ug/L mg/L mg/L ug/L ug/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L NE NE 2000 NE NE NE NE NE NE NE NE 40000 NE NE NE 0.47 NE NE NE NE NE NE NE NE NE NE 16 NE N NE NE 5 NE NE NE NE NE NE NE NE NE NE NE NE 36 NE NE NE NE NE 100 10 NE NE 20 NE NE NE 250 NE NE 0.2*500 NE NE NE 0.3*NE 1000 Sample ID Sample Collection Date SW-100 05/11/2016 <10 <1 <1 <1 <1 <0.01 1.22 <1 <1 2.15 36 36 2 <0.1 <0.2 <0.2 60 8.9 8 0.567 1.58 8 9 SW-101 05/11/2016 <10 <1 <1 <1 <1 3 1.25 <1 <1 3.02 51 50 0.86 <0.1 <0.2 <0.2 30 0.371 65 <0.3 0.85 <5 <5 SW-102 05/11/2016 14.6 <1 <1 <1 <1 1.7 1.2 <1 <1 3.12 53 55 1.7 <0.1 <0.2 <0.2 47 2 36 0.394 2.14 <5 6 SW-103 05/11/2016 <10 <1 <1 <1 <1 0.222 0.84 <1 <1 1.28 14 16 0.54 <0.1 <0.2 <0.2 <25 1.1 19 0.53 0.98 <5 <5 SW-104 05/12/2016 16.7 H1 <1 <1 <1 <1 0.219 0.985 <1 <1 2.09 25 27 1.7 <0.1 <0.2 <0.2 38 2 18 0.779 2.43 <5 <5 Prepared by: BER Checked by: TDP Notes: - Total metal concentration greater than the 15A NC 02B/EPA Human Health Criteria, 2016(NC), 2016(EPA). - Total metal concentration greater than the 15A NC 02B/EPA Ecological Criteria, 2016(NC), 2016(EPA). - Total metal concentration greater than the 15A NC 02L Standard, Appendix 2, April 1, 2013. S.U. = Standard Unit DIS = Dissolved mV = Millivolt Temp = Temperature TOT = Total mg/L = milligrams per liter Spec Cond = Specific Conductance NE = Not Establish ug/L = micrograms per liter DO = Dissolved Oxygen Deg C = Degrees Celsius mg-N/L = milligrams nitrogen per liter ORP = Oxidation Reduction Potential NTU = Nephelometric Turbidity Unit umhos/cm = micro mhos per centimeter Eh = Redox Potential ^ = NC DHHS Health Screening Level. < = Concentration not detected at or above the reporting limit. * = Interim Maximum Allowable Concentration (IMAC) of the 15A NCAC 02L Standard, Appendix 1, April 2013. H1 = Analysis conducted outside the EPA method holding time. Analytical Results Nitrate (as N)Methane Total Suspended Solids Total Organic Carbon Total Dissolved Solids SulfideSulfateAnalytical Parameter Reporting Units 15A NCAC 02B/EPA Human Health 15A NCAC 02B/EPA Ecological 15A NCAC 02L Standard TABLE 4-1 PROVISIONAL ALLUVIAL GROUNDWATER BACKGROUND CONCENTRATION SUMMARY ROUNDS 1-5 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Minimum Detected Background Concentration Maximum Detected Background Concentration Provisional Background Concentration** pH S.U.6.5-8.5 1 7 7 100 4.6 5.4 4.6 - 5.4Δ Antimony µg/L 1*1 7 0 0 ND ND ND Arsenic µg/L 10 1 8 0 0 ND ND ND Beryllium µg/L 4*1 5 1 20 ND 0.22 0.22Δ Boron µg/L 700 1 7 0 0 ND ND ND Cadmium µg/L 2 1 8 0 0 ND ND ND Chloride mg/L 250 1 7 7 100 4 14 32 Chromium µg/L 10 1 8 0 0 ND ND ND Chromium (VI)µg/L 0.07^1 3 3 100 0.12 0.17 1.3 Cobalt µg/L 1*1 7 6 86 2.12 6.11 11 Iron µg/L 300 1 8 8 100 54 1,040 4,145 Manganese µg/L 50 1 8 8 100 142 573 1,425 Nickel µg/L 100 1 8 5 63 2.44 3.1 3.8 Nitrate mg/L 10 1 2 2 100 0.16 0.42 0.42Δ Selenium µg/L 20 1 8 0 0 ND ND ND Sodium mg/L NE 1 6 6 100 3.27 5.09 8.6 Strontium µg/L NE 1 4 4 100 24 25 28 Sulfate mg/L 250 1 7 7 100 0.29 0.63 1.2 Thallium µg/L 0.2*1 8 1 13 ND 0.13 0.13Δ TDS mg/L 500 1 7 7 100 40 91 142 Vanadium µg/L 0.3*1 4 0 0 ND ND ND Prepared By: MCD Checked By: HHS Notes: - Indicates comparative value Wells included for background analysis: Alluvium (MW-10) and Saprolite (AMW-03A, CB-01, CB-09, CB-09SL, and MW-24S) A single value in the range column indicates only one detected concentration. NE = Not Established ND = Not detected above reporting limit mg/L = milligrams per liter µg/L = micrograms per liter TDS = Total dissolved solids S.U. = Standard Unit ^ = NC DHHS Health Screening Level *Interim Maximum Allowable Concentration (IMAC) of the 15A NCAC 02L Standard, Appendix 1, April 2013. ΔProvisional background concentration is the maximum observed background concentration. Frequency of Detections (%) Only those parameters for which a 2L is exceeded in the referenced hydrostratigraphic unit are included, plus Strontium as an indicator parameter **Provisional background concentration is the 95 Percent Upper Prediction Limit. Analytical Parameter Reporting Units NC2L Standard Number of Wells Number of Data Sets Number of Detections Alluvium P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-1 Prov Alluvial BG Concentrations Rounds 1-5 Page 1 of 1 TABLE 4-2 PROVISIONAL SAPROLITE GROUNDWATER BACKGROUND CONCENTRATION SUMMARY ROUNDS 1-5 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Minimum Detected Background Concentration Maximum Detected Background Concentration Provisional Background Concentration** pH S.U.6.5-8.5 4 41 41 100 4.4 6.0 4.4 - 6.0Δ Antimony µg/L 1*4 38 0 0 ND ND ND Arsenic µg/L 10 4 38 0 0 ND ND ND Beryllium µg/L 4*4 20 2 10 0.23 0.29 0.39 Boron µg/L 700 4 37 0 0 ND ND ND Cadmium µg/L 2 4 38 0 0 ND ND ND Chloride mg/L 250 4 38 17 45 1.4 14 14Δ Chromium µg/L 10 4 38 4 11 0.78 15 9.0 Chromium (VI)µg/L 0.07^4 12 9 75 0.031 0.31 1.9 Cobalt µg/L 1*4 20 13 65 0.78 2.36 4.8 Iron µg/L 300 4 38 35 92 23 2,880 4,293 Manganese µg/L 50 4 37 37 100 6 170 229 Nickel µg/L 100 4 38 12 32 0.75 10 8.6 Nitrate mg/L 10 4 25 25 100 0.29 1.8 1.8Δ Selenium µg/L 20 4 38 2 5 1.12 1.22 1.3 Sodium mg/L NE 4 20 15 75 0.993 4.15 5.0 Strontium µg/L NE 4 17 13 76 7 37 37Δ Sulfate mg/L 250 4 37 24 65 0.11 0.66 1.3 Thallium µg/L 0.2*4 38 1 3 ND 0.12 0.12Δ TDS mg/L 500 4 38 19 50 25 93 275 Vanadium µg/L 0.3*4 18 2 11 0.763 1.33 1.5 Prepared by: MCD Checked by: HHS Notes: - Indicates comparative value Wells included for background analysis: Alluvium (MW-10) and Saprolite (AMW-03A, CB-01, CB-09, CB-09SL, and MW-24S) NE = Not Established ND = Not detected above reporting limit mg/L = milligrams per liter µg/L = micrograms per liter TDS = Total dissolved solids S.U. = Standard Unit A single value in the range column indicates only one detected concentration. ^ = NC DHHS Health Screening Level *Interim Maximum Allowable Concentration (IMAC) of the 15A NCAC 02L Standard, Appendix 1, April 2013. ΔProvisional background concentration is the maximum observed background concentration. Frequency of Detections (%) Saprolite Only those parameters for which a 2L is exceeded in the referenced hydrostratigraphic unit are included, plus Strontium as an indicator parameter **Provisional background concentration is the 95 Percent Upper Prediction Limit. Analytical Parameter Reporting Units NC2L Standard Number of Wells Number of Data Sets Number of Detections P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-2 Prov Saprolite BG Concentrations Rounds 1-5 Page 1 of 1 TABLE 4-3 PROVISIONAL TRANSITION ZONE GROUNDWATER BACKGROUND CONCENTRATION SUMMARY ROUNDS 1-5 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Minimum Detected Background Concentration Maximum Detected Background Concentration Provisional Background Concentration** pH S.U.6.5-8.5 1 5 5 100 5.6 6.7 5.6 - 6.7Δ Boron µg/L 700 1 5 0 0 ND ND ND Chloride mg/L 250 1 5 5 100 0.83 1.3 2.2 Chromium µg/L 10 1 5 4 80 1.27 7.04 56 Chromium (VI)µg/L 0.07^1 3 0 0 ND ND ND Cobalt µg/L 1*1 5 5 100 1.66 3.08 5.6 Iron µg/L 300 1 5 5 100 231 610 1,895 Manganese µg/L 50 1 5 5 100 93 286 734 Nickel µg/L 100 1 5 5 100 2.07 6.03 16 Nitrate (as N)mg-N/l 10 1 5 5 100 0.036 0.165 0.59 Sodium mg/L NE 1 5 4 80 1.78 5.63 14 Selenium µg/L 20 1 5 0 0 ND ND ND Strontium µg/L NE 1 5 5 100 14 25 41 Sulfate mg/L 250 1 5 5 100 2.2 4.6 8.5 Thallium µg/L 0.2*1 5 0 0 ND ND ND TDS mg/L 500 1 5 4 80 37 67 196 Vanadium µg/L 0.3*1 5 2 40 0.34 0.416 0.57 Prepared by: MCD Checked by: HHS Notes: - Indicates comparative value Well included for background analysis: CB-01D A single value in the range column indicates only one detected concentration. NE = Not Established ND = Not detected above reporting limit mg/L = milligrams per liter µg/L = micrograms per liter mg-N/l = milligrams Nitrogen per liter TDS = Total dissolved solids S.U. = Standard Unit ^ = NC DHHS Health Screening Level *Interim Maximum Allowable Concentration (IMAC) of the 15A NCAC 02L Standard, Appendix 1, April 2013. ΔProvisional background concentration is the maximum observed background concentration. Frequency of Detections (%) Transition Zone Only those parameters for which a 2L is exceeded in the referenced hydrostratigraphic unit are included, plus Strontium as an indicator parameter **Provisional background concentration is the 95 Percent Upper Prediction Limit. Analytical Parameter Reporting Units NC2L Standard Number of Wells Number of Data Sets Number of Detections P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-3 Prov TZ BG Concentrations Rounds 1-5 Page 1 of 1 TABLE 4-4 PROVISIONAL BEDROCK GROUNDWATER BACKGROUND CONCENTRATION SUMMARY ROUNDS 1-5 ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Minimum Detected Background Concentration Maximum Detected Background Concentration Provisional Background Concentration** pH S.U.6.5-8.5 2 10 10 100 6.1 8.9 6.1 - 8.9Δ Boron µg/L 700 2 9 0 0 ND ND ND Chloride mg/L 250 2 9 7 78 1 6.4 6.4Δ Chromium µg/L 10 2 10 3 30 1.1 9.08 20 Chromium (VI)µg/L 0.07^2 6 6 100 0.068 0.21 0.60 Cobalt µg/L 1*2 10 0 0 ND ND ND Iron µg/L 300 2 10 8 80 20 678 3,225 Manganese µg/L 50 2 10 6 60 17 102 548 Sodium mg/L NE 2 10 9 90 3.47 8.21 12 Selenium µg/L 20 2 10 0 0 ND ND ND Strontium µg/L NE 2 8 8 100 56 98 122 Sulfate mg/L 250 2 9 9 100 1.1 3.3 4.4 Thallium µg/L 0.2*2 10 0 0 ND ND ND TDS mg/L 500 2 9 9 100 47 96 151 Vanadium µg/L 0.3*2 8 2 25 0.344 0.499 0.68 Prepared by: MCD Checked by: HHS Notes: - Indicates comparative value Wells included for background analysis: AMW-03B and CB-09BR A single value in the range column indicates only one detected concentration. NE = Not Established ND = Not detected above reporting limit mg/L = milligrams per liter µg/L = micrograms per liter TDS = Total dissolved solids S.U. = Standard Unit ^ = NC DHHS Health Screening Level *Interim Maximum Allowable Concentration (IMAC) of the 15A NCAC 02L Standard, Appendix 1, April 2013. ΔProvisional background concentration is the maximum observed background concentration. Frequency of Detections (%) Bedrock Only those parameters for which a 2L is exceeded in the referenced hydrostratigraphic unit are included, plus Strontium as an indicator parameter **Provisional background concentration is the 95 Percent Upper Prediction Limit. Analytical Parameter Reporting Units NC2L Standard Number of Wells Number of Samples Number of Detections P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-4 Prov Bedrock BG Concentrations Rounds 1-5 Page 1 of 1 TABLE 4-5 ALLUVIAL GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 2 250 0.07^0.07^1*300 50 20 NE NE 250 0.2*500 0.3*1000 4.6-5.4 NE NE NE NE NE NE NE NE NE NE 32 1.3 1.3+11 4145 1425 NE 8.6 28 1.2 0.13 142 NE NE Sample ID Sample Collection Date MW-10 03/05/2014 5.4 5.72 10 72 5.94 226 NM 2.9 NM <50 <1 4.4 NA NA 3.18 207 187 <1 NA NA 0.63 <0.2 55 NA 29 MW-10 04/17/2014 5.0 5.64 12 68 0.3 182 NM 2.9 NM <50 <1 8.3 NA NA NA 1040 573 <1 NA NA 0.41 <0.2 48 NA 17 MW-10 07/23/2014 4.6 5.70 19 67 0.38 244 NM 0.93 NM <50 <1 8.4 NA NA <5 598 363 <1 3.3 NA 0.58 <0.2 44 NA 15 MW-10 11/04/2014 NM NM NM NM NM NM NM NM NM NA <1 NA NA NA 6.11 675 555 <1 3.27 NA NA <0.2 NA NA 17 MW-10 05/12/2015 5.0 5.58 16 64 0.96 47 252 4.09 <0.5 <50 <1 8.9 NA NA 4.29 369 340 <1 4.02 24 0.3 <0.2 44 <0.3 85 MW-10 12/08/2015 5.4 5.79 14 74 0.4 27 232 0.69 0 <50 <0.08 12.6 0.14 NA 3.6 64 200 <0.5 5.09 24 <1 0.13 91 <1 12 MW-10 01/19/2016 5.1 5.62 8 72 0.53 481 686 0.71 0 <50 <1 14 0.17 M1 NA 2.99 63 185 <1 4.85 25 0.29 <0.2 40 <0.3 15 MW-10 04/12/2016 5.1 5.69 13 67 0.37 141 346 1.82 NM <50 <1 12 0.12 NA 2.12 54 B2 142 <1 4.15 24 0.43 <0.2 46 <0.3 14 MW-10 07/08/2016 4.6 5.74 23 70 1.71 S 359 564 6.97 NM <50 <1 15 0.14 NA 2.95 31 175 <1 5.64 26 0.3 <0.2 53 <0.3 17 CB-5 11/18/2010 NM 3.61 14 210 NM NM NM 6.46 NM 283 <0.08 23.3 NA NA NA 24100 415 <10 NA NA 31.5 <0.1 163 NA <10 CB-5 04/12/2011 5.8 3.63 12 235 0.67 -119 86 3.24 NM 169 <0.08 35.4 NA NA NA 22700 424 <10 NA NA 19.9 <0.1 112 NA <10 CB-5 07/14/2011 5.8 3.94 21 268 0.54 -95 111 2.36 NM 295 <0.08 32.3 B NA NA NA 23600 397 <10 NA NA 21 B <0.1 152 B NA <10 CB-5 11/08/2011 5.8 3.58 14 252 1.29 -122 84 9.27 NM 296 <0.08 28 NA NA NA 17400 395 <10 NA NA 25.9 <0.1 165 NA <10 CB-5 04/11/2012 5.9 3.56 13 232 0.55 -87 119 8.49 NM 130 <0.08 25.9 NA NA NA 19300 391 <10 NA NA 11.5 <0.1 134 NA <10 CB-5 07/17/2012 5.9 3.76 20 241 0.57 -16 189 7.97 NM 265 <0.08 26.5 NA NA NA 20200 329 <10 NA NA 17.1 <0.1 141 NA <10 CB-5 11/16/2012 6.0 3.51 13 203 2.48 97 302 3.08 NM 241 <0.08 26.1 NA NA NA 13800 295 <10 NA NA 6.9 <0.1 123 NA <10 CB-5 04/04/2013 5.8 3.33 8 203 2.03 58 263 3.04 NM 149 <1 18 NA NA NA 13400 283 <1 NA NA 6.2 <0.2 130 NA <5 CB-5 07/02/2013 5.6 3.40 18 215 0.46 -119 86 2.61 NM 176 <1 15 NA NA NA 18500 341 <1 NA NA 2.6 <0.2 140 NA <5 CB-5 11/06/2013 5.9 3.72 16 196 0.27 10 215 3.2 NM 186 <1 16 NA NA NA 20400 382 <1 NA NA 5.3 <0.2 120 NA <5 CB-5 04/17/2014 6.0 3.57 12 202 0.3 20 225 5.1 NM 117 <1 16 NA NA NA 21300 466 <1 NA NA 9.2 <0.2 140 NA <5 CB-5 07/10/2014 6.1 3.40 19 237 0.54 -12 193 5.5 NM 182 <1 22 NA NA NA 27400 438 <1 NA NA 3 <0.2 150 NA <5 CB-5 07/24/2014 5.9 9.55 19 226 0.24 -14 NM 7.15 NM 190 <1 21 NA NA <5 24100 434 <1 16 NA 1.4 <0.2 150 NA <5 CB-5 11/04/2014 5.9 3.73 16 255 0.4 15 220 15.3 NM 214 <1 23 NA NA NA 24700 476 <1 NA NA 17 <0.2 150 NA 6 CB-5 04/06/2015 6.7 3.66 12 216 0.51 -29 176 9.16 NM 142 <1 22 NA NA <1 19600 594 <1 15.9 NA 15 0.239 150 NA <5 CB-5 07/09/2015 6.0 5.05 19 230 0.95 -88 117 3.99 NM 209 <1 27 NA NA <1 25400 488 <1 17.4 33 8.9 <0.2 150 0.855 <5 CB-5 11/03/2015 6.1 3.49 17 302 1.27 16 221 4.83 NM 303 <1 22 NA NA <1 29800 761 <1 24.9 55 83 <0.2 180 0.381 <5 CB-5 12/09/2015 5.6 3.55 12 261 3.22 101 306 3.18 4 230 <0.08 22.2 <0.03 NA 0.84 23200 640 <0.5 21.8 50 58 <0.1 178 <1 <10 CB-5 01/18/2016 6.0 3.51 9 273 0.82 30 235 2.18 3 186 <1 22 <0.03 NA <1 26900 625 <1 18.7 42 48 <0.2 130 0.461 <5 CB-5 04/06/2016 6.0 3.61 13 243 1.3 95 300 1.56 NM 152 <1 26 NA NA <1 19400 551 <1 17.1 41 36 <0.2 160 0.385 <5 CB-5 07/07/2016 5.5 4.21 18 290 0.38 40 245 5.42 NM 246 NA 31 NA NA <1 24100 546 <1 21.3 43 43 <0.2 160 0.473 <5 CB-6 11/18/2010 NM 3.53 13 689 NM NM NM 3.99 NM 918 <0.08 38.9 NA NA NA 24600 3430 <10 NA NA 378 <0.1 642 NA <10 CB-6 04/12/2011 5.4 3.44 13 1247 0.71 -105 100 2.92 NM 758 <0.08 40 NA NA NA 32700 5060 <10 NA NA 715 <0.1 1070 NA <10 CB-6 DUP 04/12/2011 5.4 3.44 13 1247 0.71 -105 100 2.92 NM 706 <0.08 41.9 NA NA NA 32900 5080 <10 NA NA 694 <0.1 1050 NA <10 CB-6 07/14/2011 5.6 3.37 21 1090 1.21 -46 159 2.12 NM 918 <0.08 65.4 NA NA NA 37600 4720 <10 NA NA 428 <0.1 789 NA 14.1 CB-6 11/08/2011 5.5 3.26 14 930 2.42 -60 145 6.59 NM 985 <0.08 55.3 NA NA NA 28300 7080 <10 NA NA 353 <0.1 686 NA <10 CB-6 04/10/2012 5.6 3.06 15 737 1.77 -62 143 3.05 NM 758 <0.08 42.4 NA NA NA 17500 4250 <10 NA NA 304 <0.1 621 NA <10 CB-6 07/17/2012 5.7 2.72 21 604 1.39 80 285 6.65 NM 759 0.11 22.5 NA NA NA 10400 2050 <10 NA NA 174 <0.1 346 NA <10 CB-6 11/16/2012 5.2 2.68 11 602 3.96 255 460 9.55 NM 702 0.14 21.9 NA NA NA 3410 3060 <10 NA NA 207 <0.1 406 NA <10 CB-6 04/04/2013 5.8 2.68 9 429 1.29 57 262 6.42 NM 639 <1 13 NA NA NA 7720 1660 <1 NA NA 140 <0.2 250 NA <5 Analytical Parameter Background Analytical Results Alluvial Field Parameters 15A NCAC 02L Standard Reporting Units Provisional Background P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-5 Alluvial GW Exceedances Inc Prov BG Page 1 of 3 TABLE 4-5 ALLUVIAL GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 2 250 0.07^0.07^1*300 50 20 NE NE 250 0.2*500 0.3*1000 4.6-5.4 NE NE NE NE NE NE NE NE NE NE 32 1.3 1.3+11 4145 1425 NE 8.6 28 1.2 0.13 142 NE NE Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units Provisional Background CB-6 07/02/2013 5.5 2.74 20 407 1.63 -15 190 4.9 NM 865 <1 11 NA NA NA 7250 1500 <1 NA NA 110 <0.2 240 NA 6 CB-6 11/06/2013 6.0 3.35 16 343 2.1 49 254 8.8 NM 781 <1 13 NA NA NA 5610 1630 <1 NA NA 100 <0.2 210 NA <5 CB-6 04/17/2014 6.0 4.25 11 511 1 151 356 5.8 NM 629 <1 29 NA NA NA 15400 2690 <1 NA NA 190 <0.2 360 NA <5 CB-6 07/10/2014 5.9 3.32 19 607 0.4 40 245 5.3 NM 827 <1 63 NA NA NA 18100 2620 <1 NA NA 160 <0.2 400 NA <5 CB-6 07/24/2014 5.9 3.54 18 604 0.45 8 NM 9.02 NM 837 <1 61 NA NA <5 18000 2640 <1 28.2 NA 160 <0.2 390 NA <5 CB-6 11/04/2014 5.9 3.63 14 582 1.48 83 288 5.78 NM 806 <1 43 NA NA NA 14600 3010 <1 NA NA 210 <0.2 400 NA <5 CB-6 DUP 11/04/2014 5.9 3.63 14 582 1.48 83 288 5.78 NM 808 <1 41 NA NA NA 16000 3110 <1 NA NA 220 <0.2 410 NA <5 CB-6 04/06/2015 6.0 3.48 11 525 1.3 36 241 8.53 NM 609 <1 37 NA NA 1.42 14600 3330 <1 23.2 NA 170 <0.2 360 NA <5 CB-6 07/08/2015 5.9 4.94 24 745 0.6 -93 112 4.19 NM 807 <1 150 NA NA 2.21 22000 3950 <1 37.4 409 110 <0.2 520 <0.3 <5 CB-6 11/04/2015 3.4 3.27 16 1739 1.39 258 463 1.5 NM 802 <1 66 NA NA 67.3 22100 21800 1.21 54.1 B2 1400 930 <0.2 1300 <0.3 7 CB-6 12/08/2015 3.5 3.46 9 1552 1.8 438 643 2.78 3.5 700 0.49 66.3 <0.03 NA 45.5 16400 18300 1 47.1 1100 870 0.11 1250 <1 34 CB-6 01/21/2016 3.6 3.38 8 1215 3.7 214 419 2.27 1.25 599 <1 55 <0.03 NA 23.6 16600 14300 <1 41 911 590 <0.2 910 <0.3 18 CB-6 04/06/2016 3.7 3.23 11 1139 0.79 443 648 3.13 NM 576 <1 54 NA NA 21.5 19000 13500 <1 40.2 808 590 <0.2 820 <0.3 18 CB-6 07/07/2016 4.7 5.31 22 1122 0.56 243 448 3.41 NM 780 NA 49 NA NA 11.1 25400 10300 <1 51.7 746 580 <0.2 840 <0.3 7 CB-7 11/18/2010 NM 8.06 15 419 NM NM NM 0 NM 259 0.22 121 NA NA NA 342 236 <10 NA NA 53.5 <0.1 319 NA <10 CB-7 11/08/2011 5.5 7.95 16 643 4.8 -52 153 1.19 NM 282 0.14 159 NA NA NA 65.3 95.5 <10 NA NA 49.6 <0.1 372 NA <10 CB-7 07/17/2012 5.4 7.74 20 538 0.99 203 408 0.71 NM 270 <0.08 152 NA NA NA <50 130 <10 NA NA 66.9 <0.1 311 NA <10 CB-7 11/06/2013 5.7 8.03 17 384 3.2 62 267 7 NM 240 <1 68 NA NA NA 816 47 1.92 NA NA 42 <0.2 210 NA <5 CB-7 04/06/2015 5.9 7.73 11 456 6.2 65 270 0.78 NM 233 <1 95 NA NA <1 <10 <5 21.3 23.1 NA 36 <0.2 310 NA <5 CB-7 07/08/2015 5.8 8.65 21 276 4.45 66 271 1.13 NM 263 <1 36 NA NA <1 <10 <5 14.6 19.9 172 56 <0.2 190 0.574 <5 CB-7 11/02/2015 5.2 5.53 17 247 4.7 500 705 1.5 NM 66 <1 41 NA NA <1 20 5 23.2 7.57 225 21 <0.2 180 0.337 <5 CB-7 12/08/2015 5.8 5.82 12 306 2 274 479 1.5 0 88 <0.08 67.1 <0.03 NA 0.58 <50 14 11.3 10.9 320 25.3 <0.1 242 <1 38 CB-7 01/19/2016 5.9 5.79 6 322 1.7 156 361 1.5 0 121 <1 65 <0.03 NA <1 44 14 8.13 14 318 31 <0.2 200 <0.3 86 CB-7 04/06/2016 5.6 7.06 11 727 1.95 296 501 1.21 NM 213 <1 190 NA NA <1 66 40 3.86 49.8 598 31 <0.2 440 <0.3 <5 CB-7 07/07/2016 5.5 8.95 19 670 0.33 313 518 2.16 NM 272 NA 150 NA NA 1.25 86 175 <1 46.1 457 37 <0.2 460 0.372 <5 MW-11 03/05/2014 5.7 7.77 9 365 6.87 211 NM 0.8 NM <50 <1 73 NA NA 2.99 78 221 <1 NA NA 27 <0.2 240 NA 20 MW-11 04/17/2014 5.3 7.35 11 342 3.2 244 NM 0.5 NM <50 <1 80 NA NA NA <10 577 <1 NA NA 19 <0.2 210 NA 10000 MW-11 05/20/2015 5.0 8.61 16 346 1.98 93 298 1.01 <0.5 <50 <1 73 NA NA 2.14 <10 407 <1 25.8 96 25 <0.2 220 <0.3 <5 MW-11 12/08/2015 5.5 6.35 12 488 3.4 238 443 2.81 0 <50 0.1 121 0.65 NA 2 <50 250 <0.5 39.4 130 24.2 0.12 300 <1 <10 MW-11 01/18/2016 5.6 5.99 2 531 3.2 226 431 0.9 0 <50 <1 120 0.48 NA 1.23 25 239 <1 40.1 137 30 <0.2 280 <0.3 5 MW-11 04/07/2016 5.4 7.92 12 452 1.76 255 460 1.1 NM <50 <1 97 0.41 NA <1 <10 281 <1 38.4 125 28 <0.2 220 <0.3 <5 MW-11 07/08/2016 5.4 8.48 18 501 1.11 S 309 514 0.98 0 <50 <1 110 0.26 NA <1 61 113 <1 47 138 30 <0.2 300 <0.3 <5 MW-15A 03/04/2015 5.4 6.23 10 188 2.86 47 252 3.28 0.5 61 <1 43 NA NA 1.25 879 1060 <1 14.8 120 5.3 <0.2 120 <0.3 7 MW-15A 05/20/2015 4.9 7.94 18 167 0.41 151 356 4.73 <0.5 54 <1 34 NA NA <1 217 840 <1 11.7 102 5.3 <0.2 99 <0.3 <5 MW-15A 12/08/2015 5.2 6.11 14 165 1.24 257 462 1.08 0 71 <0.08 39.4 <0.03 NA 0.61 <50 1000 <0.5 13.2 93 5.8 <0.1 <25 <1 <10 MW-15A 01/18/2016 5.1 5.88 5 172 0.7 225 430 0.6 NM 60 <1 43 <0.03 NA <1 43 1000 <1 11.9 100 5.8 <0.2 91 <0.3 <5 MW-15A 04/07/2016 5.0 6.89 13 149 0.13 212 417 0.44 NM <50 <1 36 <0.03 NA <1 63 673 <1 11 90 4.8 <0.2 69 <0.3 <5 MW-15A 07/08/2016 4.9 8.17 17 173 0.73 S 340 545 2.49 0 132 <1 41 <0.03 NA <1 125 385 <1 9.87 118 5.1 <0.2 110 0.373 <5 MW-16A 03/11/2015 5.3 9.63 10 400 0.88 35 240 0.63 0.5 303 <1 93 NA NA 1.01 522 1980 <1 14.9 184 33 <0.2 260 <0.3 <5 MW-16A DUP 03/11/2015 5.3 9.63 10 400 0.88 35 240 0.63 0.5 302 <1 92 NA NA 1.1 538 2000 <1 14.7 186 36 <0.2 260 <0.3 <5 MW-16A 05/28/2015 5.0 9.84 15 432 0.51 12 217 3.17 <0.5 354 <1 97 NA NA 1.35 248 1940 <1 17.5 203 33 <0.2 350 <0.3 <5 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-5 Alluvial GW Exceedances Inc Prov BG Page 2 of 3 TABLE 4-5 ALLUVIAL GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium Zinc S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 2 250 0.07^0.07^1*300 50 20 NE NE 250 0.2*500 0.3*1000 4.6-5.4 NE NE NE NE NE NE NE NE NE NE 32 1.3 1.3+11 4145 1425 NE 8.6 28 1.2 0.13 142 NE NE Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units Provisional Background MW-16A 12/08/2015 5.1 8.46 15 432 0.61 153 358 2.65 0.5 480 <0.08 132 <0.03 NA 1.4 420 1600 <0.5 22.8 240 46.5 <0.1 355 <1 <10 MW-16A 01/18/2016 5.0 8.41 5 598 0.6 268 473 0.5 0 524 <1 140 0.034 NA 1.33 96 1620 <1 22.1 275 59 <0.2 330 <0.3 <5 MW-16A 04/08/2016 5.0 9.21 11 509 0.25 264 469 0.65 NM 447 <1 100 <0.03 NA 2 53 1560 <1 19.3 240 65 <0.2 310 <0.3 <5 MW-16A 07/08/2016 4.9 10.18 17 480 0.83 S 343 548 2.39 NM 517 <1 100 0.048 NA 1.81 171 1640 <1 19.3 228 69 <0.2 360 <0.3 <5 MW-17A 03/03/2015 6.3 5.28 8 1331 1.24 22 227 9.4 3 1060 <1 330 NA NA 26.3 8970 12800 <1 15.4 507 140 <0.2 1300 0.401 19 MW-17A 05/21/2015 6.2 6.89 24 1573 0.49 -163 42 6.72 6 1540 <1 390 NA NA 25.8 40600 11900 <1 14 536 160 <0.2 1200 2.63 48 MW-17A 12/09/2015 5.7 5.77 3 1531 2.8 255 460 6.82 NM 2000 <0.08 403 <0.03 NA 22.6 29500 6700 <0.5 14.8 560 144 <0.1 1100 <1 <0.1 B MW-17A 01/19/2016 5.7 5.52 1 1612 0.6 98 303 8.7 2 1940 <1 410 <0.03 NA 22.4 24200 6420 <1 14.1 602 170 <0.2 1100 <0.3 8 MW-17A 04/11/2016 5.8 6.29 12 1688 0.23 69 274 7.27 NM 1980 <1 410 <0.03 NA 22.4 30000 5900 <1 14.9 625 190 <0.2 NA 1.17 6 MW-17A 04/12/2016 5.8 6.29 12 1688 0.23 69 274 7.27 NM NA NA NA NA NA NA NA NA NA NA NA NA NA 1200 NA NA MW-17A 07/12/2016 5.7 6.65 20 1704 0.35 184 389 5.08 NM 2470 NA 430 <0.03 NA 17 35500 5040 <1 14.8 648 190 <0.2 1300 <0.3 <5 MW-20A 06/24/2015 6.0 4.98 21 707 0.68 -93 112 2.43 NM 641 2.01 23 NA NA 16.4 16300 15800 1.18 17.5 548 220 <0.2 480 0.328 10 MW-20A 09/03/2015 6.0 6.66 20 506 0.73 91 296 3.94 1.5 727 <1 24 NA <0.006 <1 3180 10400 <1 18 M4 352 78 <0.2 330 0.458 <5 MW-20A 12/09/2015 5.5 5.02 13 433 1 101 306 8.13 3 630 2.7 16.5 <0.03 NA 37.7 7600 5400 3.5 13.7 310 186 <0.1 294 <1 L3 <10 MW-20A 01/21/2016 5.7 5.14 9 385 1 -186 19 9.73 0.5 625 1.57 13 <0.03 NA 33.8 7110 4610 1.19 12.4 269 180 <0.2 300 <0.3 8 MW-20A 04/13/2016 5.7 3.05 13 464 0.28 89 294 9.45 NM 751 <1 16 <0.03 NA 28.1 6270 8030 <1 14.9 339 190 0.201 320 <0.3 11 AS-3 02/06/2014 5.4 3.44 10 222 4.8 342 NM 1.03 NM <50 NA NA NA NA NA 20 36 NA NA NA NA <0.2 NA NA NA AS-3 (Duke)03/04/2015 NM NM NM NM NM NM NM NM NM <50 <1 59 NA NA 1.03 117 45 <1 28.2 78 14 <0.2 160 <0.3 31 AS-3 (Vendor)03/04/2015 5.0 NM 15 214 4.8 NM NM <1 NM <500 <1 61 <10 NA 1 90 39 <1 29 73 12 <1 140 <5 25 AS-3 02/11/2016 5.0 3.92 11 256 3.44 306 511 2.76 NM <50 <1 60 0.38 NA <1 369 38 <1 27.9 75 12 <0.2 150 <0.3 <5 Prepared by: BER Checked by: TDP/MCD Notes: - Concentration exceeds the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 or provisional background concentration (whichever is greater). Deg C = Degrees Celsius mV = Millivolts mg/L = Milligram per liter ORP = Oxidation Reduction Potential DO = Dissolved oxygen ^ = NC DHHS Health Screening Level. DUP = Duplicate NA = Not analyzed ug/L = Microgram per liter umhos/cm = Micro mhos per centimeter NE = Not established NM = Not measured S.U. = Standard Unit Temp = Temperature Spec Cond = Specific Conductance NTU = Nephelometric turbidity unit ft = Feet Eh = Redox Potential < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10x the concentration in the method blank. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. M1 = Matrix Spike Recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery M4 = The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level. S = Associated calibration check did not meet specified criteria. Water Supply Wells P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-5 Alluvial GW Exceedances Inc Prov BG Page 3 of 3 TABLE 4-6 SAPROLITE GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Lead Manganese Nickel Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 4*700 2 250 0.07^0.07^10 1*300 15 50 100 10 20 NE NE 250 0.2*500 0.3* 4.4-6.0 NE NE NE NE NE NE NE NE NE NE 0.39 NE NE 14 1.9 1.9+9.0 4.8 4293 NE 229 8.6 1.8 1.3 5.0 37 1.3 0.12 275 1.5 Sample ID Sample Collection Date AMW-3A 11/04/2014 NM NM NM NM NM NM NM NM NM <1 <1 <1 NA <1 NA NA NA 12.4 <1 153 <1 22 <1 NA <1 6.54 NA NA <0.2 NA NA AMW-3A 05/12/2015 12.1 8.17 15 2350 5.41 -189 16 1.5 <0.5 <1 <1 <1 <50 <1 1.1 NA NA <1 <1 <10 <1 <5 <1 NA <1 7.7 1220 0.34 <0.2 500 8.98 CB-1 11/17/2010 4.6 47.73 14 15 NM NM NM 9.16 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 1160 <5 46.3 <5 0.51 <10 NA NA <5 <0.1 <25 NA CB-1 04/12/2011 4.4 48.20 17 18 7.57 126 331 4.81 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 589 <5 36.3 <5 0.43 <10 NA NA <5 <0.1 <25 NA CB-1 07/19/2011 4.8 48.40 22 17 7.16 -4 201 17.6 NM <0.5 <5 NA 51.1 <0.08 <5 NA NA 81.5 NA 1330 <5 43 53 B 0.43 <10 NA NA <5 <0.1 <25 NA CB-1 11/09/2011 5.4 50.47 12 19 8.36 -86 119 20.9 NM <0.5 6.7 NA <50 <0.08 <5 NA NA 8.7 NA 17800 6 293 12 0.42 <10 NA NA <5 <0.1 93 NA CB-1 04/10/2012 4.8 49.75 15 16 9.67 -44 161 8.11 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 276 <5 28.4 <5 0.41 <10 NA NA <5 <0.1 <25 NA CB-1 07/16/2012 4.6 49.09 16 20 8.65 317 522 3.65 NM <0.5 <5 NA <50 <0.08 1.6 NA NA <5 NA 179 <5 26.8 <5 0.42 <10 NA NA <2 <0.1 <25 NA CB-1 11/15/2012 4.9 50.89 16 18 7.82 335 540 7.86 NM <0.5 <5 NA <50 <0.08 1.4 NA NA <5 NA 218 <5 28.5 <5 0.36 <10 NA NA <2 <0.1 <25 NA CB-1 04/03/2013 4.5 49.47 15 20 7.89 135 340 4.78 NM <1 <1 NA <50 <1 1.5 NA NA 15 NA 98 <1 27 10 0.43 <1 NA NA <0.1 <0.2 <10 NA CB-1 07/01/2013 5.3 44.71 16 24 8.75 60 265 9.2 NM <1 <1 NA <50 <1 1.7 NA NA <5 NA 2870 <1 67 <5 0.42 1.22 NA NA <0.1 <0.2 <25 NA CB-1 11/05/2013 4.5 43.93 15 18 9.4 413 618 12 NM <1 <1 NA <50 <1 1.6 NA NA <5 NA 664 <1 33 <5 0.42 <1 NA NA 0.15 <0.2 <25 NA CB-1 04/16/2014 4.4 46.05 15 17 8.3 410 615 2.8 NM <1 <1 NA <50 <1 1.7 NA NA <5 NA 152 <1 24 <5 0.42 <1 NA NA 0.18 <0.2 <25 NA CB-1 07/09/2014 4.6 46.41 16 18 8.67 387 592 3.6 NM <1 <1 NA <50 <1 1.7 NA NA <5 NA 215 <1 26 <5 0.45 <1 NA NA 0.12 <0.2 <25 NA CB-1 11/03/2014 4.5 48.24 16 22 7.53 352 557 7.09 NM <1 <1 NA <50 <1 1.7 NA NA <5 NA 175 <1 25 <5 0.4 <1 NA NA 0.17 <0.2 <25 NA CB-1 04/07/2015 4.9 45.50 15 17 8.68 136 341 6.74 NM <1 <1 <1 <50 <1 1.6 NA NA <5 1.94 279 <1 26 <5 0.42 <1 1.04 NA 0.36 <0.2 31 NA CB-1 07/06/2015 4.7 49.12 16 20 8.34 161 366 3.82 NM <1 <1 <1 <50 <1 1.7 NA NA <5 1.95 86 <1 25 <5 1.8 <1 0.993 <5 0.61 <0.2 <25 <0.3 CB-1 11/03/2015 5.1 50.73 16 15 7.9 525 730 21 NM <1 <1 <1 <50 <1 1.2 NA NA 5 4.11 4040 <1 91 <5 1.3 <1 0.893 B2 <5 0.4 <0.2 <25 3.03 CB-1 DUP 11/03/2015 5.1 50.73 16 15 7.9 525 730 21 NM <1 <1 <1 <50 <1 1.2 NA NA <5 4.18 4560 <1 98 6 1.3 <1 0.894 <5 0.54 <0.2 <25 3.21 CB-1 12/08/2015 5.1 50.76 15 15 6.4 69 274 8.8 0 <0.5 <0.5 <0.2 <50 <0.08 1.6 0.031 NA 0.78 1.9 290 <0.1 27 1.4 NA <0.5 <5 <5 <1 <0.1 33 <1 CB-1 01/20/2016 4.9 48.27 10 16 8.32 220 425 7.81 0 <1 <1 <1 <50 <1 2.2 <0.03 NA <1 2.1 279 <1 28 1.53 NA <1 1.03 <5 <0.1 <0.2 <25 <0.3 CB-1 04/07/2016 4.9 44.14 14 17 8.22 329 534 9.74 NM <1 <1 <1 <50 <1 2 <0.03 NA <5 2.36 532 <1 31 <5 1.8 <1 1.17 <5 0.35 <0.2 <25 <0.3 CB-1 07/05/2016 4.8 47.44 23 17 5.44 360 565 8.95 NM <1 <1 <1 <50 <1 1.9 <0.03 NA <5 2.39 595 <1 32 <5 1.8 <1 1.05 <5 0.23 <0.2 <25 0.537 CB-1 DUP 07/05/2016 4.8 47.44 23 17 5.44 360 565 8.95 NM <1 <1 <1 <50 <1 NA NA NA <1 2.32 492 <1 32 1.36 NA <1 NA <5 NA <0.2 NA 0.397 CB-9 11/15/2012 5.0 37.78 15 46 1.66 399 604 8.42 NM <0.5 <5 NA <50 <0.08 6.8 NA NA <5 NA 2880 <5 105 <5 0.38 <10 NA NA <2 0.12 <25 NA CB-9 04/03/2013 4.9 37.18 15 40 7.8 112 317 2.01 NM <1 <1 NA <50 <1 6.5 NA NA <5 NA 370 <1 67 <5 0.33 <1 NA NA 0.2 <0.2 42 NA CB-9 07/01/2013 5.3 34.74 16 48 1.9 38 243 8.43 NM <1 <1 NA <50 <1 6.4 NA NA 6 NA 2080 <1 92 6 0.33 1.12 NA NA 0.11 <0.2 26 NA CB-9 11/05/2013 4.7 35.72 15 38 2.8 378 583 8.7 NM <1 <1 NA <50 <1 6.8 NA NA <5 NA 883 <1 60 <5 0.34 <1 NA NA 0.21 <0.2 28 NA CB-9 04/16/2014 4.8 36.13 15 38 2.2 347 552 3.5 NM <1 <1 NA <50 <1 6.9 NA NA <5 NA 248 <1 39 <5 0.33 <1 NA NA 0.13 <0.2 <25 NA CB-9 07/09/2014 4.8 35.89 16 38 2.59 353 558 5.3 NM <1 <1 NA <50 <1 6.8 NA NA <5 NA 531 <1 47 <5 0.35 <1 NA NA 0.12 <0.2 28 NA CB-9 11/03/2014 4.9 37.18 15 47 2.01 228 433 8.34 NM <1 <1 NA <50 <1 6.9 NA NA <5 NA 341 <1 41 <5 0.29 <1 NA NA 0.14 <0.2 26 NA CB-9 04/07/2015 5.0 37.29 16 38 2.24 114 319 8.79 NM <1 <1 <1 <50 <1 6.7 NA NA <5 1.36 653 <1 50 <5 0.29 <1 4.1 NA 0.24 <0.2 35 NA CB-9 07/06/2015 4.9 37.02 16 41 2.25 159 364 4.5 NM <1 <1 <1 <50 <1 6.7 NA NA <5 <1 158 <1 40 <5 1.2 <1 4.06 8 0.11 <0.2 25 <0.3 CB-9 09/09/2015 5.0 37.50 16 37 1.97 223 428 7.51 NM NA NA NA NA NA NA NA 0.109 NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9 11/02/2015 4.5 36.57 16 37 2.7 575 780 9 NM <1 <1 <1 <50 <1 6.6 NA NA <5 1.64 1050 <1 65 <5 1.1 <1 4.07 8 0.36 <0.2 <25 1.33 CB-9 12/08/2015 5.3 37.09 15 36 1.72 204 409 3.38 0 <0.5 <0.5 L1 <0.2 <50 <0.08 6.7 0.1 NA <0.5 0.8 150 <0.1 34 1.2 NA <0.5 <5 7 <1 <0.1 43 <1 CB-9 DUP 12/08/2015 5.3 37.09 15 36 1.72 204 409 3.38 0 <0.5 <0.5 L3 <0.2 <50 <0.08 6.8 0.11 NA <0.5 0.77 91 <0.1 33 1.3 NA <0.5 <5 7.1 <1 <0.1 60 D6 <1 CB-9 01/21/2016 5.2 35.48 15 36 1.8 284 489 1.8 0 <1 <1 <1 <50 <1 6.9 0.12 NA <1 <1 84 <1 36 1.28 NA <1 3.89 7 0.14 <0.2 <25 <0.3 CB-9 04/06/2016 5.1 34.71 15 37 2.21 336 541 9.33 NM <1 <1 <1 <50 <1 6.9 0.089 NA <5 1.45 739 <1 52 <5 1.2 <1 4 7 0.25 <0.2 <25 0.763 CB-9 07/05/2016 5.0 36.47 17 36 2.38 348 553 9.75 NM <1 <1 <1 <50 <1 7.1 0.085 NA <5 1.14 294 <1 40 <5 1.2 <1 3.94 7 0.11 <0.2 <25 0.501 CB-9 DUP 07/05/2016 5.0 36.47 17 36 2.38 348 553 9.75 NM <1 <1 <1 <50 <1 NA NA NA 1 1.16 345 <1 44 1.86 NA <1 NA 8 NA <0.2 NA 0.55 CB-9SL 04/27/2015 6.0 36.05 13 76 1.08 130 335 30.4 <0.5 <1 <1 <1 <50 <1 6.1 NA NA 2.86 1.21 475 <1 125 2.13 NA <1 8.54 40 0.74 <0.2 92 0.56 CB-9SL 05/28/2015 5.8 35.98 19 59 1.59 84 289 5.97 <0.5 <1 <1 <1 <50 <1 6.6 NA NA <1 <1 73 <1 71 <1 NA <1 4.15 28 0.57 <0.2 43 <0.3 CB-9SL 09/08/2015 5.8 36.51 16 59 2.61 165 370 3 NM NA NA NA NA NA NA NA 0.111 NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-9SL 12/08/2015 6.0 35.99 14 56 2.11 198 403 6.44 0 <0.5 <0.5 L3 0.29 <50 <0.08 6.2 0.2 NA 1.3 <0.5 320 0.19 12 0.77 NA <0.5 <5 28 <1 <0.1 93 <1 CB-9SL 01/21/2016 5.8 34.50 9 54 2 225 430 7.1 0 <1 <1 <1 <50 <1 6.5 0.2 NA <1 <1 95 <1 15 <1 NA <1 3 30 0.24 <0.2 41 <0.3 CB-9SL 04/13/2016 5.6 34.05 15 56 1.63 97 302 1.05 NM <1 <1 <1 <50 <1 6.3 0.25 NA <1 <1 23 <1 6 <1 NA <1 3.25 24 0.25 <0.2 54 <0.3 CB-9SL 07/11/2016 5.7 35.64 17 55 1.5 129 334 9.3 NM <1 <1 <1 <50 <1 6.3 0.23 NA 19.3 <1 158 4.89 13 12.4 NA <1 3.27 27 0.72 <0.2 43 0.392 MW-24S 05/11/2015 5.0 11.26 17 75 5.48 72 277 1.77 NM <1 <1 <1 <50 <1 12 NA NA <1 2.05 304 <1 170 1.16 NA <1 3.48 37 0.49 <0.2 54 <0.3 MW-24S 06/01/2015 5.2 11.19 15 79 4.67 97 302 2.74 <0.5 <1 <1 <1 <50 <1 13 NA NA <1 1.02 60 <1 136 1.07 NA <1 3.25 36 0.62 <0.2 66 <0.3 MW-24S 09/02/2015 5.2 11.34 18 78 5.03 193 398 0.96 NM NA NA NA NA NA NA NA 0.152 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-24S 12/08/2015 5.2 10.95 14 77 4.81 154 359 0.25 0 <0.5 <0.5 L3 0.23 <50 <0.08 13 0.3 M1 NA <0.5 0.78 <50 <0.1 120 0.75 NA <0.5 <5 35 <1 <0.1 72 <1 MW-24S 01/19/2016 5.3 10.98 12 79 5.12 148 353 0.8 0 <1 <1 <1 <50 <1 14 0.31 NA <1 1.06 <10 <1 150 1.02 NA <1 3.31 37 0.66 <0.2 36 <0.3 MW-24S 04/12/2016 5.2 11.30 14 81 4.66 205 410 0.75 NM <1 <1 <1 232 <1 14 0.26 NA <1 <1 235 B2 <1 359 1.04 NA <1 3.38 228 0.74 <0.2 63 <0.3 MW-24S DUP 04/12/2016 5.2 11.30 14 81 4.66 205 410 0.75 NM <1 <1 <1 <50 <1 15 0.26 NA <1 <1 16 B2 <1 153 1.05 NA <1 3.34 40 0.78 <0.2 57 <0.3 MW-24S 07/08/2016 4.3 10.81 17 80 6.21 S 325 530 1.22 NM <1 <1 <1 <50 <1 14 0.26 NA <1 <1 <10 <1 136 <1 NA <1 3.35 40 0.62 <0.2 52 <0.3 Reporting Units Analytical Parameter Background Analytical ResultsField Parameters 15A NCAC 02L Standard Provisional Background P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-6 Saprolite Exceedances Inc Prov BG Page 1 of 4 TABLE 4-6 SAPROLITE GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Lead Manganese Nickel Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 4*700 2 250 0.07^0.07^10 1*300 15 50 100 10 20 NE NE 250 0.2*500 0.3* 4.4-6.0 NE NE NE NE NE NE NE NE NE NE 0.39 NE NE 14 1.9 1.9+9.0 4.8 4293 NE 229 8.6 1.8 1.3 5.0 37 1.3 0.12 275 1.5 Sample ID Sample Collection Date Reporting Units Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Provisional Background ABMW-2S 03/17/2015 4.2 25.53 17 813 0.41 99 304 2.39 1 <1 11.2 11 760 2.96 12 NA NA 1.47 569 1120 <1 17500 233 NA 10.7 19.3 258 610 0.369 640 <0.3 ABMW-2S 05/27/2015 4.1 26.05 19 832 0.26 122 327 9.33 <0.5 <1 16 12.5 751 3.3 14 NA 0.054 <1 578 557 <1 16200 247 NA 10.8 15.7 259 730 0.333 670 0.666 ABMW-2S DUP 05/27/2015 4.1 26.05 19 832 0.26 122 327 9.33 <0.5 <1 16 12.6 761 3.24 14 NA NA <1 576 453 <1 16500 245 NA 10.3 15.7 262 720 0.329 660 0.421 ABMW-2S 09/01/2015 3.9 26.90 17 746 1.5 235 440 1.2 NM NA NA NA NA NA NA NA 0.047 B NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-2S 12/09/2015 4.2 25.07 17 773 0.36 240 445 1.17 0 <0.5 18.9 11.6 730 2.9 13.7 <0.03 NA <0.5 417 <100 0.11 9600 168 NA 14.5 <25 220 397 M6 0.24 611 <1 ABMW-2S 01/21/2016 4.1 24.38 16 866 0.22 165 370 0.43 0 <1 23.5 12.4 851 3.48 16 <0.06 NA <1 589 27 <1 18400 286 NA 2.48 16.2 340 630 0.258 710 0.364 ABMW-5S 04/13/2015 5.9 16.44 14 211 3.53 51 256 2.62 <0.5 <1 <1 <1 <50 <1 7.8 NA NA <1 14.3 207 <1 395 2.28 NA <1 7.16 87 17 <0.2 130 <0.3 ABMW-5S 05/26/2015 5.8 18.30 20 222 0.42 -36 169 25.7 3 <1 <1 <1 <50 <1 5.2 NA 0.017 <1 16.7 4800 <1 537 3.37 NA <1 6.34 83 20 0.309 130 <0.3 ABMW-5S 09/01/2015 5.7 19.66 21 221 4.8 120 325 2.6 NM NA NA NA NA NA NA NA <0.006 NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-7S 04/12/2015 6.5 24.47 18 355 3.73 117 322 6.47 <0.5 <1 <1 <1 596 <1 6.3 NA NA 1.24 6.12 216 <1 798 <1 NA 3.65 13.9 333 82 0.311 190 0.76 ABMW-7S 05/27/2015 6.3 25.86 21 423 0.5 -35 170 1.96 <0.5 <1 <1 <1 789 <1 7.3 NA 0.232 <1 3.5 170 <1 763 <1 NA 1.65 11.6 442 120 0.664 200 <0.3 ABMW-7S 09/03/2015 6.3 28.71 19 420 0.8 122 327 4.1 NM NA NA NA NA NA NA NA 0.026 j NA NA NA NA NA NA NA NA NA NA NA NA NA NA APD-1 02/18/2014 5.7 5.41 8 653 0.91 271 NM 5.8 NM <1 1.35 NA 949 <1 48 NA NA <5 8.03 1770 <1 4720 <5 NA <1 NA NA 290 <0.2 580 NA APD-7 02/17/2014 5.3 25.10 12 214 0.61 219 NM 19.1 NM <1 <1 NA 132 <1 20 NA NA <5 <1 739 <1 38 <5 NA 16.4 NA NA 25 <0.2 110 NA APD-7 05/13/2015 5.5 25.60 21 169 1.2 66 271 4.76 <0.5 <1 <1 <1 119 <1 10 NA NA <1 <1 38 <1 12 <1 NA 19 4.07 47 27 <0.2 96 <0.3 CB-2 11/17/2010 5.3 19.13 13 212 NM NM NM 9.29 NM <0.5 <5 NA 241 <0.08 8.5 NA NA <5 NA 705 <5 2570 <5 0.11 <10 NA NA 92.9 0.18 158 NA CB-2 04/12/2011 5.3 17.31 14 244 0.4 -61 144 6.35 NM <0.5 <5 NA 229 <0.08 6.9 NA NA <5 NA 292 <5 2630 <5 <0.1 <10 NA NA 93.8 0.16 113 NA CB-2 07/15/2011 5.3 18.89 16 260 0.56 47 252 1.4 NM <0.5 <5 NA 245 <0.08 6.9 B NA NA <5 NA <50 <5 2580 <5 <0.2 <10 NA NA 80.6 0.18 133 B NA CB-2 11/09/2011 5.5 19.79 13 278 0.74 -93 112 1.81 NM <0.5 <5 NA 239 <0.08 8.7 NA NA <5 NA 197 <5 2690 <5 <0.2 <10 NA NA 95.8 0.18 262 NA CB-2 04/10/2012 5.2 18.64 15 253 0.44 -60 145 7.53 NM <0.5 <5 NA 219 <0.08 19.7 NA NA <5 NA <50 <5 2560 <5 <0.2 <10 NA NA 69.4 0.17 161 NA CB-2 DUP 04/10/2012 5.2 18.64 15 253 0.44 -60 145 7.53 NM <0.5 <5 NA 219 <0.08 11.4 NA NA <5 NA 54.5 <5 2540 <5 <0.2 <10 NA NA 74.6 0.17 162 NA CB-2 07/16/2012 5.3 19.98 19 279 0.98 382 587 2.31 NM <0.5 <5 NA 226 0.12 10.1 NA NA <5 NA 109 <5 2660 <5 <0.02 <10 NA NA 89.7 0.2 154 NA CB-2 11/15/2012 5.3 20.58 13 277 0.61 271 476 5.44 NM <0.5 <5 NA 230 0.098 10.5 NA NA <5 NA 146 <5 2580 <5 0.029 B <10 NA NA 83.6 0.21 153 NA CB-2 04/03/2013 5.3 18.32 14 263 0.82 93 298 2.54 NM <1 <1 NA 227 <1 9.3 NA NA <5 NA 34 <1 2890 <5 0.05 1.17 NA NA 86 <0.2 160 NA CB-2 07/01/2013 6.4 18.42 15 280 0.54 -103 102 1.37 NM <1 <1 NA 223 <1 8.8 NA NA <5 NA 243 <1 2900 <5 0.32 1.58 NA NA 79 <0.2 160 NA CB-2 DUP 07/01/2013 6.4 18.42 15 280 0.54 -103 102 1.37 NM <1 <1 NA 222 <1 8.7 NA NA <5 NA 175 <1 2910 <5 0.32 1.45 NA NA 79 <0.2 150 NA CB-2 11/06/2013 5.1 22.04 14 277 0.4 564 769 7.2 NM <1 <1 NA 307 <1 8.1 NA NA <5 NA 214 <1 3030 <5 <0.023 3.92 NA NA 91 <0.2 160 NA CB-2 04/16/2014 5.2 21.77 12 204 0.4 450 655 2.4 NM <1 <1 NA 257 <1 4.3 NA NA <5 NA 169 <1 2950 <5 0.92 <1 NA NA 68 <0.2 120 NA CB-2 07/09/2014 5.2 22.44 15 189 0.68 322 527 8 NM <1 <1 NA 240 <1 3.6 NA NA <5 NA 335 <1 3030 <5 1.4 <1 NA NA 59 <0.2 120 NA CB-2 11/03/2014 5.2 23.45 13 184 0.4 298 503 4.09 NM <1 <1 NA 209 <1 3.1 NA NA <5 NA 70 <1 2920 <5 1.7 <1 NA NA 50 <0.2 92 NA CB-2 04/07/2015 5.4 23.55 15 159 0.61 119 324 8.73 NM <1 <1 <1 174 <1 2.9 NA NA <5 4.26 319 <1 3030 <5 2.2 <1 9.94 NA 38 <0.2 100 NA CB-2 07/07/2015 5.3 24.00 18 148 0.83 115 320 4.43 NM <1 <1 <1 155 <1 2.7 NA NA <5 4.17 146 <1 3000 <5 9.8 <1 10 13 35 <0.2 93 <0.3 CB-2 11/03/2015 5.3 24.39 15 157 1.3 22 227 3.5 NM <1 <1 <1 198 <1 2.9 NA NA <5 5.7 97 <1 2750 <5 10 <1 10.8 19 38 0.483 81 <0.3 CB-4 11/18/2010 NM 17.58 13 217 NM NM NM 0.22 NM <0.5 <5 NA 404 <0.08 11.6 NA NA <5 NA <50 <5 368 <5 1.9 10.5 NA NA 96.9 <0.1 163 NA CB-4 04/12/2011 5.1 16.48 14 259 2.92 -79 126 3.74 NM <0.5 <5 NA 344 <0.08 10.2 NA NA <5 NA 90.5 <5 381 <5 1.8 <10 NA NA 85 <0.1 111 NA CB-4 07/14/2011 5.0 17.52 16 267 2.92 -29 176 0.65 NM <0.5 <5 NA 356 <0.08 9.8 B NA NA <5 NA <50 <5 411 <5 1.7 10.7 NA NA 84.1 <0.1 146 B NA CB-4 11/08/2011 5.1 17.60 15 291 2.14 -54 151 6.83 NM <0.5 <5 NA 415 <0.08 10.6 NA NA <5 NA 50.7 <5 465 <5 1.7 <10 NA NA 66.5 <0.1 180 NA CB-4 DUP 11/08/2011 5.1 17.60 15 291 2.14 -54 151 6.83 NM <0.5 <5 NA 419 <0.08 11.9 NA NA <5 NA 82.2 <5 469 <5 1.7 <10 NA NA 65.6 <0.1 293 NA CB-4 04/10/2012 5.1 16.80 14 261 2.32 -49 156 1.62 NM <0.5 <5 NA 324 0.085 11.7 NA NA <5 NA <50 <5 414 <5 1.8 <10 NA NA 73.4 <0.1 175 NA CB-4 07/16/2012 5.1 17.56 17 284 2.44 184 389 1.54 NM <0.5 <5 NA 371 <0.08 12.4 NA NA <5 NA 72.7 <5 475 <5 1.5 10.4 NA NA 94.5 <0.1 176 NA CB-4 11/15/2012 5.2 17.40 15 308 2.32 263 468 0.36 NM <0.5 <5 NA 391 0.12 12.4 NA NA <5 NA <50 <5 483 <5 1.5 <10 NA NA 91.9 <0.1 180 NA CB-4 04/03/2013 5.0 16.37 13 265 3.45 108 313 3.93 NM <1 <1 NA 322 <1 9 NA NA <5 NA 34 <1 464 <5 1.3 10 NA NA 97 <0.2 180 NA CB-4 07/01/2013 5.1 16.44 16 243 4.2 17 222 0.78 NM <1 <1 NA 288 <1 6.7 NA NA <5 NA 17 <1 393 <5 1.1 8.93 NA NA 75 <0.2 150 NA CB-4 11/06/2013 5.0 18.19 15 307 2.7 377 582 5.4 NM <1 <1 NA 525 <1 9.5 NA NA <5 NA 97 <1 591 <5 1.3 12.4 NA NA 120 <0.2 200 NA CB-4 04/16/2014 5.2 17.69 13 322 2.9 241 446 1.2 NM <1 <1 NA 527 <1 8.9 NA NA <5 NA 39 <1 597 <5 1.9 10.4 NA NA 130 <0.2 210 NA CB-4 DUP 04/16/2014 5.2 17.69 13 322 2.9 241 446 1.2 NM <1 <1 NA 519 <1 6.9 NA NA <5 NA 33 <1 593 <5 0.33 10.3 NA NA 130 <0.2 220 NA CB-4 07/09/2014 5.1 18.70 17 331 3.93 407 612 4.2 NM <1 <1 NA 567 <1 8.6 NA NA <5 NA 209 <1 677 <5 2.3 9.69 NA NA 130 <0.2 230 NA CB-4 11/03/2014 5.1 19.70 15 366 3.77 434 639 9.59 NM <1 <1 NA 653 <1 9 NA NA <5 NA 241 <1 809 <5 2.8 8.43 NA NA 130 <0.2 230 NA CB-4 04/08/2015 5.1 19.00 13 340 4.52 112 317 6.73 NM <1 <1 <1 590 <1 7.5 NA NA <5 1.63 291 <1 747 <5 2.8 8 18.1 NA 140 <0.2 240 NA CB-4 07/08/2015 5.2 20.38 18 335 3.12 206 357 18 NM <1 <1 <1 598 <1 7.6 NA NA <5 5.41 3340 1.57 920 <5 16 7.58 17.7 213 130 <0.2 230 4.68 CB-4 11/04/2015 5.2 20.30 16 359 2.23 0 205 8.15 NM <1 <1 <1 683 <1 8.9 NA NA <5 2.47 226 <1 975 <5 8.9 6.23 18.5 B2 243 140 <0.2 220 0.446 CB-4 12/09/2015 5.1 18.59 14 291 5.8 262 467 10.1 0 <0.5 <0.5 <0.2 540 <0.08 4.5 0.23 NA 0.55 B 1.7 210 0.22 570 1.4 NA 8.8 17.4 190 115 <0.1 198 <1 CB-4 01/19/2016 5.3 16.89 9 212 5.97 164 369 2.83 0 <1 <1 <1 378 <1 2.2 <0.03 NA <1 1.05 10 <1 382 <1 NA 7.36 14.9 136 100 <0.2 120 <0.3 CB-4 04/05/2016 5.2 18.31 13 213 8.52 329 534 2.41 NM <1 <1 <1 350 <1 2 NA NA <5 <1 111 <1 408 <5 1 5.57 15.1 138 93 <0.2 140 <0.3 CB-4 DUP 04/05/2016 5.2 18.31 13 213 8.52 329 534 2.41 NM <1 <1 <1 348 <1 2 NA NA <5 <1 117 <1 406 <5 1.1 5.24 15.2 137 96 <0.2 140 <0.3 CB-4 07/05/2016 5.2 21.42 26 241 3.33 383 588 4.5 NM <1 <1 <1 400 <1 5.2 NA NA <5 1.64 28 <1 722 <5 16 4.65 14.7 178 92 <0.2 150 <0.3 DP-1 02/17/2014 6.9 11.62 11 1229 0.17 -107 NM 48.1 NM <1 1220 NA 1140 <1 8.2 NA NA <5 41.8 10100 <1 2430 9 NA <1 NA NA 160 0.73 730 NA Saprolite P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-6 Saprolite Exceedances Inc Prov BG Page 2 of 4 TABLE 4-6 SAPROLITE GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Lead Manganese Nickel Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 4*700 2 250 0.07^0.07^10 1*300 15 50 100 10 20 NE NE 250 0.2*500 0.3* 4.4-6.0 NE NE NE NE NE NE NE NE NE NE 0.39 NE NE 14 1.9 1.9+9.0 4.8 4293 NE 229 8.6 1.8 1.3 5.0 37 1.3 0.12 275 1.5 Sample ID Sample Collection Date Reporting Units Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Provisional Background DP-1 05/13/2015 7.1 11.94 21 550 0.74 50 255 39.6 2.25 <1 1180 <1 378 <1 2.3 NA NA <1 20.7 8770 <1 1570 3.64 NA <1 6.22 1810 96 <0.2 370 3.12 GW-1 12/14/2007 4.5 20.39 14 98 NM NM NM NM NM <5 6.3 NA <10 <1 8.2 NA NA 35.7 NA 56800 29.4 NA 34.1 6.3 <10 NA NA <5 0.12 50 NA GW-1 04/21/2008 3.8 19.78 14 98 NM NM NM NM NM <5 <5 NA <10 <1 <5 NA NA <5 NA 2880 <5 189 8.7 8.2 <10 NA NA <5 <0.5 40 NA GW-1 10/13/2008 4.4 19.95 13 72 NM NM NM NM NM <5 <5 NA <50 <1 <5 NA NA <5 NA 122 <5 74.8 5 5.2 <10 NA NA <5 <0.1 54 NA GW-1 04/14/2009 4.3 19.70 14 89 NM NM NM NM NM <5 <5 NA <50 <1 <5 NA NA <5 NA 575 <5 98.5 7.5 7.7 <10 NA NA <5 <0.5 70 NA GW-1 10/16/2009 4.5 19.82 14 102 NM NM NM NM NM <5 <5 NA <50 <1 <5 NA NA <5 NA 232 <5 100 6.5 8.2 <10 NA NA <5 <0.5 74 NA GW-1 05/11/2010 3.1 19.63 13 106 NM NM NM NM NM <5 <5 NA <50 <1 <5 NA NA <5 NA 459 <5 90.3 5 8.6 <10 NA NA <5 <0.1 26 NA GW-1 11/17/2010 4.5 20.16 11 69 NM NM NM 6.32 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 63.6 <5 81 <5 7.7 <10 NA NA <5 <0.1 46 NA GW-1 04/12/2011 4.3 19.33 13 112 5.06 49 254 7.46 NM <0.5 <5 NA <50 <5 <5 NA NA <5 NA 248 <5 138 7.1 10.9 <10 NA NA <5 <0.1 44 NA GW-1 07/14/2011 4.3 19.88 16 87 5.01 -84 121 2.77 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 79.6 <5 134 7 B 7.5 <10 NA NA <5 <0.1 <25 NA GW-1 11/09/2011 4.6 20.54 14 96 4.36 -82 123 2.28 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 102 <5 205 5.9 7.9 <10 NA NA <5 <0.1 86 NA GW-1 04/10/2012 4.6 20.03 16 104 3.95 -67 138 3.07 NM <0.5 <5 NA <50 <0.08 <5 NA NA <5 NA 96 <5 341 5.9 8 <10 NA NA <5 <0.1 64 NA GW-1 07/16/2012 4.4 19.92 16 93 2.92 297 502 7.98 NM <0.5 <5 NA 65.1 0.082 4.7 NA NA <5 NA 147 <5 310 <5 7.1 <10 NA NA <2 <0.1 57 NA GW-1 11/15/2012 4.6 20.69 15 96 2.26 348 553 5.76 NM <0.5 <5 NA <50 0.1 4.9 NA NA <5 NA 480 <5 293 <5 6 <10 NA NA 3.1 <0.1 37 NA GW-1 04/03/2013 4.5 20.68 15 93 2.48 137 342 2.57 NM <1 <1 NA <50 <1 5.4 NA NA <5 NA 31 <1 442 <5 5.9 2.04 NA NA 1.9 <0.2 69 NA GW-1 07/01/2013 4.8 20.47 17 125 3.42 12 217 2.17 NM <1 <1 NA <50 <1 6.2 NA NA <5 NA 49 <1 612 6 7.1 3.32 NA NA 3.2 <0.2 80 NA GW-1 11/05/2013 4.5 20.94 14 148 2.3 436 641 3.1 NM <1 <1 NA <50 <1 7 NA NA <5 NA 89 <1 737 5 7.8 4.9 NA NA 15 <0.2 87 NA GW-1 04/17/2014 4.6 20.55 15 138 1.6 290 495 8 NM <1 1.25 NA <50 <1 6 NA NA <5 NA 275 <1 692 <5 6.4 1.47 NA NA 17 <0.2 75 NA GW-1 07/10/2014 4.4 20.14 17 154 1.5 364 569 1.9 NM <1 1.61 NA <50 <1 7.1 NA NA <5 NA 84 <1 683 <5 6.2 1.53 NA NA 24 <0.2 85 NA GW-1 11/04/2014 4.7 20.95 17 155 0.98 337 542 8.62 NM <1 <1 NA <50 <1 6.7 NA NA <5 NA 568 <1 534 <5 4.1 1.56 NA NA 27 <0.2 75 NA GW-1 04/07/2015 4.8 20.81 15 123 0.89 121 326 0.67 NM <1 <1 <1 <50 <1 6.6 NA NA <5 4.71 15 <1 507 <5 3.2 1.6 1.09 NA 25 <0.2 83 NA GW-1 07/06/2015 4.8 20.58 19 137 1.1 263 468 4.99 NM <1 <1 <1 <50 <1 6.6 NA NA <5 4.76 101 <1 551 <5 13 1.78 1.05 <5 35 <0.2 78 <0.3 GW-1 11/02/2015 5.2 20.55 17 115 1.4 541 746 0.8 NM <1 <1 <1 <50 <1 6.6 NA NA <5 3.79 26 <1 397 <5 7.4 1.33 1.41 <5 27 0.21 67 <0.3 GW-1 12/09/2015 4.8 20.09 16 127 1.1 355 560 4.64 0 <0.5 0.94 0.23 <50 <0.08 6.7 1 NA 1.2 5.6 <50 0.16 460 3.2 NA 1.7 <5 <5 24.5 <0.1 84 <1 L3 GW-1 01/18/2016 4.8 20.19 15 161 1.8 397 602 8.02 0 <1 <1 <1 <50 <1 5.5 0.87 NA 1.2 6.13 104 <1 725 3.4 NA 1.53 1.13 <5 29 <0.2 82 <0.3 GW-1 04/05/2016 4.8 20.65 14 220 1.51 360 565 2.43 NM <1 1.26 <1 <50 <1 7.9 NA NA <5 6.92 141 <1 1070 <5 32 2.32 1.13 <5 52 <0.2 120 <0.3 GW-1 07/06/2016 4.8 20.46 22 180 0.55 366 571 2.78 NM <1 <1 <1 <50 <1 6.9 NA NA <5 5.06 29 <1 668 <5 15 B2 2.17 1.32 <5 50 <0.2 120 <0.3 GW-1 DUP 07/06/2016 4.8 20.46 22 180 0.55 366 571 2.78 NM <1 <1 <1 <50 <1 6.9 NA NA <5 4.98 33 <1 657 <5 15 B2 2.17 1.29 <5 58 <0.2 110 <0.3 GW-3 12/14/2007 5.7 12.76 16 498 NM NM NM NM NM <5 <5 <1 1120 <1 12.1 NA NA <5 NA 337 <5 NA <5 <0.1 <10 NA NA 150 0.10 320 NA GW-3 04/21/2008 6.4 12.15 14 463 NM NM NM NM NM <5 <5 <1 1300 <1 14.2 NA NA <5 NA 889 <5 1370 <5 <0.1 <10 NA NA 127 <0.1 300 NA GW-3 10/13/2008 5.7 12.69 16 504 NM NM NM NM NM <5 <5 <1 1290 <1 21.2 NA NA <5 NA 86.1 <5 1850 <5 <0.1 <10 NA NA 148 <0.1 370 NA GW-3 04/14/2009 5.7 11.93 14 500 NM NM NM NM NM <5 <5 <1 1320 <1 24.7 NA NA <5 NA 122 <5 1120 <5 <0.1 <10 NA NA 142 <0.5 218 NA GW-3 10/16/2009 5.7 11.88 16 470 NM NM NM NM NM <5 <5 <1 1190 <1 26.8 NA NA <5 NA 261 <5 736 <5 0.25 <10 NA NA 156 <0.5 328 NA GW-3 05/11/2010 5.7 11.50 14 481 NM NM NM NM NM <5 <5 <1 1240 <1 34.2 NA NA <5 NA 3470 <5 1770 <5 <0.1 <10 NA NA 143 <0.1 290 NA GW-3 02/18/2014 5.7 12.40 11 678 2.03 341 NM 9.5 NM <1 <1 NA 1400 <1 51 NA NA <5 18.3 1100 <1 385 <5 NA 1.59 NA NA 210 <0.2 470 NA GW-3 05/14/2015 5.6 12.99 17 476 2.72 78 283 6.98 <0.5 <1 <1 <1 1170 <1 39 NA NA <1 17.2 485 <1 555 <1 NA 2.84 12.5 679 170 <0.2 440 0.301 GW-3 12/09/2015 5.7 11.92 15 295 2 279 484 9.3 0 <0.5 <0.5 <0.2 760 <0.08 14.7 0.16 NA <0.5 3.9 310 0.17 150 0.57 NA 3.8 17.8 420 83.9 <0.1 221 <1 L1 GW-3 01/21/2016 5.7 11.77 12 221 0.37 119 324 3.37 1 <1 <1 <1 477 <1 17 <0.03 NA <1 51.5 955 <1 3200 2.41 NA 1.17 12.7 316 50 <0.2 200 <0.3 GW-3 04/25/2016 5.8 13.00 16 880 1.26 304 509 1.96 NM <1 <1 <1 1840 <1 89 NA NA <1 1.66 NA <1 NA NA NA <1 NA NA 310 <0.2 670 NA MW-6S 04/15/2015 5.5 1.55 14 332 0.33 115 320 9.52 <0.5 <1 <1 <1 1090 <1 12 NA NA <1 15.6 645 <1 10000 1.9 NA <1 14.1 147 120 <0.2 220 0.543 MW-6S 05/21/2015 5.3 4.51 16 343 0.45 51 256 3.94 <0.5 <1 <1 <1 1050 <1 12 NA NA <1 6.17 225 <1 9970 <1 NA <1 14.6 141 130 <0.2 220 <0.3 MW-8S 03/06/2015 6.0 7.69 11 2013 0.79 41 246 4.25 <0.5 <1 <1 <1 5030 <1 450 NA NA <1 7.73 162 <1 2850 2.47 NA 1.17 18.8 4410 260 <0.2 1500 0.342 MW-8S 05/27/2015 5.9 6.93 23 1949 0.95 108 313 8.15 <0.5 <1 <1 <1 5330 <1 450 NA 0.045 <1 3.09 17 <1 2830 1.65 NA 1.41 15 4160 290 <0.2 1900 <0.3 MW-8S 09/01/2015 6.2 7.34 25 1897 1.18 169 374 1.02 NM NA NA NA NA NA NA NA 0.026 B NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-8S 12/09/2015 6.0 6.27 17 1810 0.8 272 477 2.31 0 <0.5 0.74 <0.2 5600 <0.08 398 0.035 NA <0.5 2.8 <50 <0.1 2600 1.5 NA 1.2 14.4 3700 243 <0.1 1280 <1 L3 MW-8S 01/20/2016 6.1 5.86 11 1851 0.4 197 402 0.5 0 <1 <1 <1 6140 <1 420 <0.03 NA <1 2.75 15 <1 2920 1.56 NA 1.13 14.3 3540 260 <0.2 1300 <0.3 MW-9S 04/27/2015 5.5 28.52 19 2252 2.04 132 337 4.16 <0.5 <1 <1 <1 4730 <1 560 NA NA <1 15.8 70 <1 4290 5.24 NA 36.6 18.1 3080 250 0.294 1700 <0.3 MW-9S 05/21/2015 5.5 28.56 20 2291 1.19 37 242 5.59 <0.5 <1 <1 <1 4800 <1 570 NA NA <1 5.9 211 <1 3630 3.92 NA 40.6 17.5 2950 270 <0.2 1700 <0.3 MW-9S 12/09/2015 5.2 28.20 12 2182 1.3 429 634 3.32 0 <0.5 <0.5 <0.2 5400 0.18 <1 0.37 NA 0.64 4 <50 <0.1 3400 3.2 NA 39.7 17.2 3000 290 0.19 1410 <1 L1 MW-9S 01/20/2016 5.7 27.69 7 2135 1.4 362 567 1 NM <1 <1 <1 5560 <1 530 0.5 NA 16.1 3.64 78 <1 3410 9.71 NA 34 17 2600 290 <0.2 1500 <0.3 P-100 05/19/2015 5.4 75.12 22 359 0.22 -124 81 9.01 <0.5 <1 <1 <1 732 <1 12 NA NA 12.7 35.9 545 <1 3380 13.6 NA <1 17.2 18 140 <0.2 230 0.457 P-101 05/19/2015 5.7 86.39 22 418 0.24 -6 199 2.53 <0.5 <1 <1 <1 1200 <1 12 NA NA 2.34 14.3 155 <1 2320 4.18 NA <1 14.3 362 160 <0.2 260 <0.3 P-103 05/20/2015 5.6 48.53 20 209 0.19 -80 125 8.91 0.5 <1 <1 <1 420 <1 11 NA NA 6.07 20 724 <1 7410 10.1 NA <1 5.8 25 50 <0.2 120 0.488 P-104 05/19/2015 5.7 44.84 21 222 0.87 -21 184 13.3 <0.5 <1 <1 <1 194 <1 7.1 NA NA 1.64 26.8 737 <1 1150 3.56 NA 1.37 6.04 88 41 <0.2 140 0.559 P-105 05/13/2015 5.0 44.78 20 70 3.56 74 279 8.09 NM <1 <1 <1 <50 <1 9 NA NA 2.5 3.97 422 <1 120 5.01 NA <1 2.58 26 3.1 <0.2 44 0.584 PZ-1S 12/14/2006 6.6 11.70 16 1 NM NM NM NM NM 4.8 <2 <0.7 345 <0.5 7.2 NA NA <2 NA 987 <2 463 2.8 0.37 <2 76.2 NA 180 <4 397 NA PZ-8 12/14/2006 5.8 49.49 14 1 NM NM NM NM NM <2 476 <0.7 1200 <0.5 7.5 NA NA <2 NA 22500 <2 2720 <2 0.54 <2 5.2 NA 40 <4 310 NA PZ-12 12/14/2006 7.1 12.54 14 0 NM NM NM NM NM <2 2 <0.7 574 <0.5 6.7 NA NA <2 NA 233 <2 7880 2.5 0.41 <2 23 NA 110 <4 222 NA PZ-19 12/14/2006 5.7 17.63 14 0 NM NM NM NM NM 10.4 5.2 <0.7 623 0.7 6.1 NA NA 9.3 NA 595 <2 76.2 8.7 0.99 <2 21.4 NA 94 5.8 191 NA P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-6 Saprolite Exceedances Inc Prov BG Page 3 of 4 TABLE 4-6 SAPROLITE GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Beryllium Boron Cadmium Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Lead Manganese Nickel Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 4*700 2 250 0.07^0.07^10 1*300 15 50 100 10 20 NE NE 250 0.2*500 0.3* 4.4-6.0 NE NE NE NE NE NE NE NE NE NE 0.39 NE NE 14 1.9 1.9+9.0 4.8 4293 NE 229 8.6 1.8 1.3 5.0 37 1.3 0.12 275 1.5 Sample ID Sample Collection Date Reporting Units Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Provisional Background PZ-19 06/12/2007 7.3 17.66 16 329 NM NM NM NM NM <0.1 0.42 0.88 478 0.23 7.16 NA NA 82.2 NA 18700 0.7 179 59.5 1.52 2.9 NA NA 104 0.43 214 NA PZ-19 12/13/2007 5.6 17.74 22 373 NM NM NM NM NM <5 <5 <1 483 <1 12.3 NA NA 81.7 NA 7210 <5 NA 55.5 0.95 <10 NA NA 112 0.22 272 NA PZ-19 04/21/2008 6.5 17.71 19 357 NM NM NM NM NM <5 <5 <1 558 <1 11.3 NA NA 8.5 NA 572 <5 81.6 5.7 0.97 <10 NA NA 113 0.16 230 NA PZ-19 10/13/2008 5.8 17.34 17 373 NM NM NM NM NM <5 <5 <1 498 <1 13.3 NA NA 6.3 NA 558 <5 23.8 <5 1.4 <10 NA NA 122 0.13 262 NA PZ-19 05/11/2010 5.9 17.63 16 323 NM NM NM NM NM <5 <5 <1 547 <1 12.2 NA NA 15.8 NA 1590 <5 38.6 8.8 1.3 <10 NA NA 121 0.16 160 NA PZ-19 02/19/2014 5.9 21.77 14 488 0.5 301 NM 2.3 NM <1 <1 NA 1000 <1 12 NA NA <5 <1 151 <1 238 <5 NA <1 NA NA 170 0.2 310 NA PZ-19 05/20/2015 5.7 24.34 22 450 2.48 117 322 9.77 <0.5 2.16 <1 <1 969 <1 9.8 NA NA 4.34 <1 471 <1 272 5.63 NA <1 16.9 565 170 0.252 NA 0.99 PZ-22 12/14/2006 5.5 1.30 10 0 NM NM NM NM NM 3.3 <2 <0.7 706 0.5 6 NA NA <2 NA 351 <2 1570 2.1 0.52 <2 19.6 NA 100 <4 198 NA PZ-22 06/12/2007 7.4 1.58 16 318 NM NM NM NM NM <0.1 0.85 0.22 579 0.48 7.35 NA NA 9 NA 12700 5.4 1150 6.5 0.05 2.7 NA NA 105 0.32 217 NA PZ-22 12/13/2007 4.8 1.55 13 351 NM NM NM NM NM <5 <5 <1 578 <1 10.9 NA NA <5 NA 1390 <5 NA <5 0.19 <10 NA NA 106 0.11 214 NA PZ-22 04/21/2008 5.6 1.65 14 346 NM NM NM NM NM <5 <5 <1 756 <1 10.1 NA NA <5 NA 1110 <5 1840 <5 0.16 <10 NA NA 116 0.12 222 NA PZ-22 10/13/2008 5.3 1.56 15 358 NM NM NM NM NM <5 <5 <1 722 <1 12.3 NA NA <5 NA 750 <5 1830 <5 0.17 <10 NA NA 123 0.12 238 NA PZ-22 04/14/2009 5.3 1.42 13 320 NM NM NM NM NM <5 <5 <1 733 <1 11.9 NA NA <5 NA 1190 <5 2040 <5 0.12 <10 NA NA 118 <0.5 230 NA PZ-22 10/16/2009 5.5 1.48 16 345 NM NM NM NM NM <5 <5 <1 633 <1 13 NA NA <5 NA 1260 <5 1830 <5 0.23 <10 NA NA 115 <0.5 230 NA PZ-22 05/11/2010 5.5 1.47 14 306 NM NM NM NM NM <5 <5 <1 772 <1 12.7 NA NA <5 NA 1390 <5 1880 <5 0.14 <10 NA NA 107 <0.1 164 NA PZ-22 02/19/2014 5.7 1.55 9 441 0.1 109 NM 8.8 NM <1 <1 NA 798 <1 11 NA NA <5 9.13 4740 <1 2200 <5 NA <1 NA NA 170 <0.2 270 NA PZ-22 07/23/2014 5.2 2.29 19 417 0.43 255 NM 7.36 NM <1 <1 NA 1200 <1 10 NA NA <5 12 1430 <1 2400 <5 0.84 <1 16.8 NA 170 <0.2 280 NA PZ-22 05/18/2015 5.5 3.07 17 467 0.56 35 240 5.73 2 <1 <1 <1 1210 <1 8.3 NA NA <1 6.95 2300 <1 2230 1.29 NA <1 17.2 826 200 <0.2 290 <0.3 PZ-23 02/20/2014 5.4 19.98 14 298 0.4 482 NM 2.9 NM <1 2.58 NA 287 <1 8.8 NA NA <5 25.3 53 <1 3800 <5 NA <1 NA NA 91 0.22 160 NA PZ-23 05/18/2015 5.4 21.40 17 228 0.42 147 352 9.22 0 <1 <1 <1 226 <1 4.4 NA NA <1 22.4 358 <1 3640 1.43 NA <1 16.5 112 62 <0.2 120 0.389 PZ-24 02/20/2014 6.0 5.84 14 422 0.3 14 NM 7.5 NM <1 2.21 NA <50 <1 4.3 NA NA <5 2.67 45900 <1 1730 6 NA <1 NA NA 0.12 <0.2 210 NA PZ-24 05/19/2015 6.0 8.63 24 511 1.02 90 295 33.4 7 <1 1.11 <1 <50 <1 6.8 NA NA 4.49 4.35 69200 <1 2000 3.56 NA <1 5.24 202 <0.1 <0.2 260 4.25 PZ-26 02/20/2014 4.5 23.50 15 31 2.9 281 NM 8.2 NM <1 <1 NA <50 <1 1.9 NA NA <5 2.34 657 <1 40 <5 NA <1 NA NA <0.1 <0.2 <25 NA PZ-26 05/19/2015 4.8 27.08 20 42 1.94 101 306 9.44 <0.5 <1 <1 <1 <50 <1 2.8 NA NA <1 2.23 189 <1 34 <1 NA <1 2 9 0.13 <0.2 <25 <0.3 PZ-26 12/10/2015 5.0 26.50 12 41 1.7 223 428 8.88 0 <0.5 <0.5 0.35 <50 <0.08 3.7 0.093 NA <0.5 2.4 340 0.11 34 1 NA <0.5 <5 11 <1 <0.1 42 D6 <1 PZ-27 02/20/2014 7.5 32.80 16 1376 0.2 -109 NM 274 NM 10.6 1730 NA 2370 6.5 32 NA NA 30 11.5 12500 14.1 484 34 NA 3.54 NA NA 300 1.34 960 NA Still Pipe 02/18/2014 6.0 Artesian 14 1220 0.25 246 NM 0.61 NM <1 3.89 NA 1660 <1 85 NA NA <5 39.8 950 <1 10400 17 NA 1.75 NA NA 390 <0.2 870 NA Prepared by: BER Checked by: TDP/MCD Notes: Deg C = Degrees Celsius mV = Millivolts mg/L = Milligram per liter ORP = Oxidation Reduction Potential DO = Dissolved oxygen DUP = Duplicate NA = Not analyzed ug/L = Microgram per liter umhos/cm = Micro mhos per centimeter NE = Not established S.U. = Standard Unit ft = Feet Temp = Temperature Spec Cond = Specific Conductance NM = Not measured Eh = Redox Potential NTU = Nephelometric turbidity unit ^ = NC DHHS Health Screening Level < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10x the concentration in the method blank. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for complicance purposes. D6 = The relative percent difference (RPD) between the sample and sample duplicate exceeded laboratory control limits. L1 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. M1 = Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. M6 = Matrix spike and matrix spike duplicate recovery not evaluated against control limits due to sample dilution. - Concentration exceeds the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 or provisional background concentration (whichever is greater). P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-6 Saprolite Exceedances Inc Prov BG Page 4 of 4 TABLE 4-7 TRANSITION ZONE EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Nickel Nitrate (as N)Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg-N/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 250 0.07^0.07^10 1*300 50 100 10 10 20 NE NE 250 0.2*500 0.3* 5.6-6.7 NE NE NE NE NE NE NE NE NE 2.2 NE NE 56 5.6 1895 734 16 0.59 NE NE 14 41 8.5 NE 196 0.57 Sample ID Sample Collection Date CB-1D 04/28/2015 6.7 38.22 17 75 1.56 1 206 7.52 <0.5 <50 1.3 NA NA 7.04 2.54 528 226 6.03 0.036 NA <1 5.63 25 2.7 <0.2 44 0.416 CB-1D 05/21/2015 6.4 38.36 16 57 0.8 48 253 2.83 0.5 <50 1.1 NA NA 1.27 1.66 589 286 2.07 0.038 NA <1 3.89 19 2.2 <0.2 37 0.34 CB-1D 09/08/2015 5.8 38.92 16 30 2.87 122 327 2.36 NM NA NA NA 0.013 j NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-1D 12/08/2015 6.4 39.34 15 39 1.5 -67 138 3.26 NM <50 1.2 <0.03 NA 2.4 2.6 610 180 3.7 0.11 NA <0.5 <5 19 3.2 <0.1 67 <1 CB-1D 01/20/2016 5.8 37.24 13 31 2.12 115 320 3.67 0 <50 0.83 <0.03 NA 1.83 2.34 269 151 2.72 0.093 NA <1 1.78 14 3.2 <0.2 <25 <0.3 CB-1D 04/13/2016 5.6 34.08 15 36 3.17 91 296 4.08 NM <50 0.91 <0.03 NA <1 3.08 231 93 4.97 0.165 NA <1 2.92 17 4.6 <0.2 38 <0.3 CB-1D 07/08/2016 5.1 36.70 20 30 6.53 S 213 418 9.65 NM <50 0.96 <0.03 NA <1 2.33 193 70 2.32 0.208 NA <1 2.48 14 2.1 <0.2 <25 <0.3 CB-1D DUP 07/08/2016 5.1 36.70 20 30 6.53 S 213 418 9.65 NM <50 7.5 <0.03 NA <1 2.03 163 68 1.85 0.206 NA <1 2.1 14 5.6 <0.2 <25 <0.3 ABMW-4D 03/31/2015 6.1 36.62 16 366 0.25 9 214 5.08 3 1050 12 NA NA <1 67.3 8370 6070 2.5 <0.01 NA <1 5.59 214 100 <0.2 240 0.789 ABMW-4D 05/26/2015 5.7 37.05 18 375 0.45 212 417 6.47 3.5 1080 12 NA 0.02 <1 54.2 6360 5820 2.25 0.016 NA <1 5.19 176 110 0.319 250 0.564 ABMW-4D DUP 05/26/2015 5.7 37.05 18 375 0.45 212 417 6.47 3.5 1080 13 NA NA <1 54.6 6290 5790 2.31 0.037 NA <1 5.26 179 110 0.291 240 0.451 ABMW-4D 09/08/2015 5.8 38.81 17 366 0.49 21 226 3.44 NM NA NA NA 0.021 j NA NA NA NA NA NA NA NA NA NA NA NA NA NA ABMW-4D 12/10/2015 5.6 37.51 15 365 0.2 16 221 9.31 3 1100 12.1 <0.03 NA 1.5 49.6 8200 5700 2.9 0.028 NA <0.5 5.41 180 109 0.21 214 <1 ABMW-4D DUP 12/10/2015 5.6 37.51 15 365 0.2 16 221 9.31 3 1100 12.2 <0.03 NA 1.7 49.3 7900 5600 3 0.021 NA <0.5 5.59 170 108 0.24 246 1.2 ABMW-4D 01/21/2016 5.7 35.45 15 356 0.18 47 252 8.21 2.5 1110 13 <0.03 NA 1.15 50.4 7630 5790 2.62 0.017 NA <1 5.23 181 120 <0.2 240 0.603 ABMW-5D 04/12/2015 6.2 17.07 14 291 0.49 96 301 5.57 3.5 108 9.8 NA NA <1 1.2 21100 517 1.14 <0.01 NA <1 10 114 15 <0.2 200 <0.3 ABMW-5D 05/26/2015 6.1 20.33 19 270 0.48 -96 109 9.39 4 106 11 NA 0.016 <1 <1 19000 369 <1 0.025 NA <1 8.01 108 16 <0.2 170 <0.3 ABMW-5D 09/01/2015 6.2 20.92 22 264 1 46 251 1.6 NM NA NA NA 0.008 B NA NA NA NA NA NA NA NA NA NA NA NA NA NA AMW-2A 07/24/2014 5.5 21.82 18 297 0.24 80 NM 2.95 NM 296 8.4 NA NA <5 19 8200 1790 <5 0.04 0.18 1.54 16.5 NA 87 <0.2 190 NA AMW-2A 05/19/2015 5.7 22.12 18 296 0.54 -34 171 9.4 <0.5 225 8.2 NA NA <1 21.2 16800 2950 1.35 0.04 NA <1 13.9 236 65 <0.2 190 <0.3 AMW-2A 12/09/2015 5.3 21.42 16 152 0.8 136 341 8.95 1.5 70 5.4 <0.03 NA <0.5 12.9 5400 1600 4.9 0.36 NA <0.5 9.77 82 40 0.11 113 <1 AMW-2A 01/19/2016 5.8 21.20 10 221 0.23 113 318 5.27 3.5 132 7.7 <0.03 NA <1 20.5 25700 3110 2.21 0.018 NA <1 9.34 174 51 <0.2 140 <0.3 CB-3 11/18/2010 NM 22.81 13 279 NM NM NM 0.71 NM 389 13.3 NA NA <5 NA 3490 159 <5 NA 0.36 <10 NA NA 114 0.31 187 NA CB-3 04/12/2011 5.7 22.30 16 344 0.14 -106 99 0.35 NM 356 12.8 NA NA <5 NA 1260 142 <5 NA 0.5 <10 NA NA 108 0.41 130 NA CB-3 07/14/2011 5.7 22.25 18 370 0.3 -25 180 0.55 NM 351 13.6 B NA NA <5 NA 879 146 <5 NA 0.43 <10 NA NA 114 0.4 165 B NA CB-3 11/09/2011 5.9 22.26 14 406 0.49 -121 84 1.5 NM 423 13.2 NA NA <5 NA 796 155 <5 NA <0.2 <10 NA NA 168 0.38 440 NA CB-3 04/10/2012 5.8 22.40 18 473 0.4 -53 152 1.36 NM 615 13.9 NA NA <5 NA 774 179 <5 NA 0.42 <10 NA NA 142 0.48 287 NA CB-3 07/16/2012 5.8 22.02 21 530 0.65 107 312 0.67 NM 895 13.9 NA NA <5 NA 384 178 <5 NA 0.21 <10 NA NA 194 0.45 293 NA CB-3 DUP 07/16/2012 5.8 22.02 21 530 0.65 107 312 0.67 NM 900 13.6 NA NA <5 NA 331 178 <5 NA 0.23 <10 NA NA 196 0.43 300 NA CB-3 05/19/2015 5.8 31.24 18 439 0.4 229 434 40.8 <0.5 947 8.8 NA NA <1 1.88 844 331 1.84 0.465 NA 3.03 13.1 584 150 0.398 240 0.675 CB-3R 11/14/2012 5.2 26.11 16 488 0.66 190 395 4.05 NM 1290 13 NA NA <5 NA 190 366 <5 NA 1 <10 NA NA 170 0.32 324 NA CB-3R 04/03/2013 5.4 26.14 17 415 0.58 87 292 7.8 NM 704 11 NA NA <5 NA 10100 231 <5 NA 0.4 2.15 NA NA 170 <0.2 300 NA CB-3R 07/01/2013 5.4 26.58 18 449 0.42 -61 144 0.77 NM 858 10 NA NA <5 NA 4060 296 <5 NA 0.71 4.41 NA NA 160 0.239 300 NA CB-3R 11/06/2013 5.5 30.05 16 391 0.4 98 303 3.2 NM 603 11 NA NA <5 NA 17700 188 <5 NA <0.023 <1 NA NA 160 <0.2 270 NA CB-3R 04/16/2014 5.3 30.96 18 416 0.1 317 522 3.9 NM 702 11 NA NA <5 NA 4060 512 <5 NA 4 1.81 NA NA 160 <0.2 290 NA CB-3R 07/09/2014 5.2 31.84 19 540 0.25 279 484 9.6 NM 805 11 NA NA <5 NA 766 1110 13 NA 21 2.69 NA NA 150 0.216 360 NA CB-3R 07/23/2014 4.9 31.92 20 594 0.29 296 NM 7.82 NM 805 11 NA NA <5 27 766 1160 0.013 21 92 2.69 NA NA 150 0.216 360 NA CB-3R 11/03/2014 5.5 33.00 19 489 0.17 185 390 11.2 NM 589 12 NA NA 13 NA 4570 593 33 NA 8.6 <1 NA NA 160 <0.2 300 NA CB-3R 04/08/2015 5.0 35.46 16 541 0.7 102 307 49.7 NM 571 11 NA NA 20 17.1 6240 510 49 NA 3.2 <1 18.6 NA 180 <0.2 310 NA CB-3R 07/08/2015 4.5 35.33 18 644 1.75 152 357 5.97 NM 720 10 NA NA <5 29.9 2980 754 52 23 110 1.78 17.7 733 180 0.257 420 2.7 CB-3R 11/04/2015 5.0 35.61 17 537 3.97 138 343 31.4 NM 594 11 NA NA 12 30.8 9040 651 67 13 60 1.5 18.5 B2 637 180 <0.2 320 2.14 CB-3R 04/05/2016 4.8 30.51 17 616 0.38 304 509 9.87 NM 742 7.3 NA NA <5 15.7 1090 818 7 45 200 3.34 16.6 820 95 0.379 420 <0.3 CB-3R 07/06/2016 4.9 35.39 22 517 2.49 381 586 9.29 NM 760 6.7 NA NA <5 21.1 697 586 35 21 92 B2 3.58 16.2 723 140 0.321 370 0.428 CB-8 11/18/2010 NM 50.33 14 907 NM NM NM 0.92 NM 972 299 NA NA <5 NA 64.6 579 <5 NA 1.6 25 NA NA 108 <0.1 645 NA CB-8 04/12/2011 5.0 48.60 16 1135 2.89 -79 126 9.23 NM 1110 319 NA NA 11 NA 815 683 7.7 NA 1.8 24.2 NA NA 119 <0.1 617 NA CB-8 07/15/2011 5.1 48.84 18 1102 3.01 -21 184 6.95 NM 1060 271 NA NA 30.8 NA 370 696 41 B NA 1.4 21.2 NA NA 100 <0.1 700 NA CB-8 11/08/2011 5.1 51.53 17 1180 2.87 -83 122 2.67 NM 1360 295 NA NA 5.2 NA 145 786 <5 NA 1.7 25.1 NA NA 96.3 <0.1 764 NA CB-8 04/11/2012 5.1 49.75 15 824 3.04 -64 141 5.29 NM 1080 212 NA NA <5 NA 93.9 709 <5 NA 1.5 19.2 NA NA 113 <0.1 581 NA CB-8 07/17/2012 5.0 40.04 15 682 3.25 552 757 0.38 NM 841 162 NA NA <5 NA <50 552 <5 NA 1.9 15.2 NA NA 63.4 <0.1 407 NA CB-8 11/15/2012 5.0 45.68 15 885 2.37 362 567 7.24 NM 1140 220 NA NA <5 NA 80.6 652 <5 NA 1.8 13 NA NA 97.4 <0.1 516 NA CB-8 04/04/2013 5.0 45.40 15 876 2.54 99 304 4.35 NM 1090 170 NA NA <5 NA 63 679 <5 NA 1.6 18.1 NA NA 90 <0.2 730 NA CB-8 DUP 04/04/2013 5.0 45.40 15 876 2.54 99 304 4.35 NM 1110 170 NA NA <5 NA 97 695 <5 NA 1.6 18 NA NA 89 <0.2 740 NA CB-8 07/02/2013 5.5 44.44 15 719 2.9 20 225 1.77 NM 1060 140 NA NA <5 NA 73 647 <5 NA 1.6 16.5 NA NA 81 <0.2 600 NA CB-8 11/06/2013 5.1 45.46 15 747 2.4 456 661 5.6 NM 1230 160 NA NA <5 NA 225 764 <5 NA 2.1 17.5 NA NA 85 <0.2 490 NA CB-8 DUP 11/06/2013 5.1 45.46 15 747 2.4 456 661 5.6 NM 1230 160 NA NA <5 NA 180 765 <5 NA 2.1 17 NA NA 85 <0.2 490 NA CB-8 04/17/2014 5.2 46.92 15 850 1.9 365 570 4 NM 1570 190 NA NA <5 NA 115 857 <5 NA 2 18.6 NA NA 92 <0.2 610 NA CB-8 07/10/2014 5.0 46.92 16 847 2 372 577 3.3 NM 1700 190 NA NA <5 NA 187 904 <5 NA 2 18.1 NA NA 97 <0.2 820 NA Analytical Parameter Analytical Results Background Transition Zone Field Parameters 15A NCAC 02L Standard Reporting Units Provisional Background P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-7 Transition Zone Exceedances Inc Prov BG Page 1 of 3 TABLE 4-7 TRANSITION ZONE EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Nickel Nitrate (as N)Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg-N/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 250 0.07^0.07^10 1*300 50 100 10 10 20 NE NE 250 0.2*500 0.3* 5.6-6.7 NE NE NE NE NE NE NE NE NE 2.2 NE NE 56 5.6 1895 734 16 0.59 NE NE 14 41 8.5 NE 196 0.57 Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units Provisional Background CB-8 DUP 07/10/2014 5.0 46.92 16 847 2 372 577 3.3 NM 1670 190 NA NA <5 NA 134 889 <5 NA 2 18.4 NA NA 97 <0.2 820 NA CB-8 11/03/2014 5.1 49.40 16 884 1.07 502 707 2.26 NM 1860 210 NA NA <5 NA 63 968 <5 NA 1.8 20.3 NA NA 110 <0.2 750 NA CB-8 04/07/2015 5.1 50.29 16 1021 1.49 122 327 2.16 NM 2350 220 NA NA <5 2.54 63 1120 <5 NA 1.9 18.6 8.58 NA 120 <0.2 710 NA CB-8 DUP 04/07/2015 5.1 50.29 16 1021 1.49 122 327 2.16 NM 2330 220 NA NA <5 2.76 76 1110 <5 NA 1.9 20.1 8.5 NA 120 <0.2 730 NA CB-8 07/06/2015 5.1 49.45 16 964 1.94 297 502 2.35 NM 2310 220 NA NA <5 2.68 46 1080 <5 1.8 7.7 19.5 8.06 655 140 <0.2 840 <0.3 CB-8 DUP 07/06/2015 5.1 49.45 16 964 1.94 297 502 2.35 NM 2320 220 NA NA <5 2.71 39 1080 <5 1.8 7.8 18.9 8.09 NA 140 <0.2 860 <0.3 CB-8 11/02/2015 5.5 50.93 16 991 1.7 479 684 1.3 NM 2640 220 NA NA <5 2.98 139 1160 <5 1.7 7.5 20.1 8.77 718 110 <0.2 930 0.379 CB-8 12/08/2015 5.3 49.32 14 947 1.35 226 431 1.6 0 2500 221 0.39 NA 0.94 B 3.5 <50 1100 3.1 1.9 NA 21 7.33 650 115 <0.1 652 <1 CB-8 01/20/2016 5.3 46.90 11 886 3.3 456 661 1.1 0 2300 200 0.27 NA <1 4.23 16 1200 2.39 1.6 NA 15.4 7.14 567 120 <0.2 580 <0.3 CB-8 04/06/2016 5.2 44.92 15 771 1.65 519 724 1.31 NM 2130 170 NA NA <5 3.59 48 1060 <5 1.9 8.5 13.7 6.79 489 110 <0.2 550 <0.3 CB-8 07/06/2016 5.1 46.42 20 743 1.55 387 592 2.83 NM 2200 150 NA NA <5 2.7 31 865 <5 2.3 10 B2 14.1 7.11 458 110 <0.2 560 0.354 GW-1D 05/07/2015 5.4 20.66 19 63 0.38 75 280 7.3 <0.5 <50 5 NA NA <1 7.77 951 369 2.5 0.524 NA <1 2.73 33 2.3 <0.2 35 0.451 GW-1D 05/28/2015 5.3 20.59 17 55 0.42 63 268 5.53 <0.5 <50 5.3 NA 0.046 <1 4.02 295 240 1.44 0.542 NA <1 2.52 29 2.9 <0.2 41 <0.3 GW-1D 09/02/2015 5.2 20.67 21 56 0.89 283 488 3.92 NM NA NA NA 0.042 B NA NA NA NA NA NA NA NA NA NA NA NA NA NA GW-1D 12/09/2015 5.3 20.19 16 37 2.3 208 413 0.12 NM <50 3.2 0.072 NA <0.5 1.7 72 72 1.3 0.74 NA <0.5 <5 24 1.3 <0.1 <25 <1 L3 GW-1D 01/18/2016 5.3 20.29 15 43 1.9 178 383 3.55 0 <50 4.2 0.091 NA <1 1.62 221 97 1.1 0.646 NA <1 2.09 25 1.4 <0.2 32 0.339 GW-4 12/14/2007 5.3 15.96 21 327 NM NM NM NM NM 528 10.7 NA NA 8.7 NA 3230 NA 11.4 NA 0.55 <10 NA NA 100 0.16 206 NA GW-4 04/21/2008 5.9 15.49 14 295 NM NM NM NM NM 586 9.8 NA NA 6.8 NA 231 143 9.9 NA 0.37 <10 NA NA 101 <0.1 182 NA GW-4 10/13/2008 5.4 16.04 16 327 NM NM NM NM NM 592 11.6 NA NA 5.3 NA 152 153 11.1 NA 0.51 <10 NA NA 116 0.10 226 NA GW-4 04/14/2009 5.5 15.35 15 306 NM NM NM NM NM 580 11.3 NA NA 5.6 NA 486 170 11.4 NA 0.49 <10 NA NA 112 <0.5 232 NA GW-4 10/16/2009 5.6 15.48 15 328 NM NM NM NM NM 563 13.1 NA NA 5.3 NA 233 176 10.5 NA 0.59 <10 NA NA 112 <0.5 228 NA GW-4 05/11/2010 5.7 15.48 14 287 NM NM NM NM NM 541 12.5 NA NA 7.6 NA 2710 216 8.6 NA 0.46 <10 NA NA 149 0.12 148 NA GW-4 02/19/2014 5.5 20.04 15 423 1.1 371 NM 8.9 NM 915 12 NA NA 7 1.56 422 369 16 NA NA 1.23 NA NA 160 0.24 270 NA GW-4 05/18/2015 5.5 23.26 18 390 1.09 83 288 7.15 <0.5 994 10 NA NA 4.93 <1 67 185 10.9 0.599 NA <1 15.1 170 150 <0.2 260 0.328 GW-5 12/14/2007 5.6 25.85 23 410 NM NM NM NM NM 413 11.9 NA NA 5.4 NA 3740 NA 5.2 NA 0.4 <10 NA NA 125 0.27 270 NA GW-5 04/21/2008 5.1 25.78 19 379 NM NM NM NM NM 398 11.9 NA NA 44.6 NA 46200 971 30.6 NA 1.2 13.9 NA NA 117 0.65 242 NA GW-5 10/13/2008 5.5 25.63 17 378 NM NM NM NM NM 407 14.9 NA NA <5 NA 182 189 <5 NA 1.2 <10 NA NA 120 0.28 246 NA GW-5 04/14/2009 5.5 25.80 19 320 NM NM NM NM NM 387 13.4 NA NA <5 NA 648 192 <5 NA 1.5 <10 NA NA 116 <0.5 248 NA GW-5 10/16/2009 5.6 25.66 17 361 NM NM NM NM NM 341 14 NA NA <5 NA 3090 189 <5 NA 1.3 <10 NA NA 105 <0.5 242 NA GW-5 05/11/2010 5.7 25.73 16 316 NM NM NM NM NM 351 12.3 NA NA <5 NA 1350 170 <5 NA 1.5 <10 NA NA 142 0.33 156 NA GW-5 02/20/2014 5.6 30.10 18 483 0.2 195 NM 71.3 NM 1100 11 NA NA 38 8.37 15600 363 21 NA NA 2.94 NA NA 200 0.75 280 NA MW-1D 05/11/2015 5.3 28.94 20 68 2.02 87 292 1.35 <0.5 <50 2.7 NA NA <1 15.4 107 248 7.67 1.4 NA <1 3.46 31 5.9 <0.2 47 <0.3 MW-1D 05/21/2015 5.5 29.02 18 71 0.65 62 267 3.54 0.5 <50 2.9 NA NA <1 9.45 360 221 4.78 1.2 NA <1 3.32 31 5.3 <0.2 41 <0.3 MW-1D 12/09/2015 5.3 28.43 10 53 1.1 205 410 1.78 0 <50 3.4 <0.03 NA <0.5 3 <50 45 2.8 1.3 NA <0.5 <5 31 2.6 <0.1 32 <1 L3 MW-1D 01/18/2016 5.5 27.07 4 56 1.6 102 307 2.1 0 <50 3.6 <0.03 NA <1 2.47 71 39 2.56 1.3 NA <1 2.69 28 3.5 <0.2 37 <0.3 MW-3D 05/07/2015 6.3 38.88 16 394 0.82 -13 192 35.9 4 531 10 NA NA 194 3.88 12000 633 135 0.039 NA <1 20.5 265 140 <0.2 250 1.75 MW-3D 05/21/2015 6.0 39.44 20 385 0.33 89 294 4.76 5.5 469 11 NA NA <1 <1 12700 560 3.89 0.029 NA <1 20.6 250 140 <0.2 270 <0.3 MW-3D 12/09/2015 5.4 36.77 17 555 0.45 110 315 4.93 3 470 11.6 <0.03 NA 0.72 47 22400 1000 101 0.04 NA <0.5 21.2 450 264 0.15 451 <1 L3 MW-3D 01/20/2016 4.6 33.77 10 444 0.49 49 254 9.74 1.25 639 10 <0.03 NA 1.2 85.2 1540 2620 47.3 16 NA 5.01 17.6 583 190 0.802 310 <0.3 MW-4D 04/28/2015 5.5 8.35 13 54 6.4 83 288 5.19 <0.5 <50 2.9 NA NA <1 12.2 582 204 1.48 1.7 NA <1 2.6 31 1.8 <0.2 35 0.379 MW-4D 05/21/2015 5.1 9.65 16 46 5.04 167 372 2.62 <0.5 <50 3.1 NA NA <1 5.28 34 87 1.07 1.6 NA <1 2.49 27 1.5 <0.2 33 <0.3 MW-5D 05/07/2015 5.5 17.95 14 401 4.74 64 269 0.89 2.5 505 9 NA NA <1 48 10100 557 29.5 1.5 NA 3.41 24.8 252 150 <0.2 250 <0.3 MW-5D DUP 05/07/2015 5.5 17.95 14 401 4.74 64 269 0.89 2.5 505 9 NA NA <1 49.9 9590 569 33 1.5 NA 3 24.5 254 160 <0.2 250 <0.3 MW-5D 05/27/2015 4.0 18.49 17 389 1.7 93 298 2.82 NM 518 9.2 NA 0.021 <1 39.1 484 456 26.1 1 NA 2 22.7 267 190 <0.2 250 <0.3 MW-5D 09/02/2015 3.6 20.27 16 382 1.1 296 501 0.1 NM NA NA NA <0.006 NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-5D 12/09/2015 4.2 16.50 14 388 0.23 247 452 2.6 2 590 9 <0.03 NA <0.5 24.8 2100 400 18.4 0.82 NA 4.1 22.3 290 152 <0.1 253 <1 L3 MW-5D 01/19/2016 4.0 16.41 10 392 0.4 312 517 0.47 2.5 638 9.6 <0.03 NA <1 24.3 2440 494 17.5 0.933 NA 3.96 21.5 305 190 <0.2 240 <0.3 MW-6D 04/15/2015 5.8 1.63 15 392 0.32 121 326 5.42 <0.5 1750 11 NA NA 1.25 7.47 406 5280 1.47 <0.01 NA <1 9.7 337 140 0.236 280 0.363 MW-6D 05/21/2015 5.5 4.61 18 383 0.34 428 633 1.06 <0.5 1680 11 NA NA <1 3.85 23 4480 1.13 0.021 NA <1 8.95 302 150 <0.2 260 <0.3 MW-9D 05/04/2015 5.8 29.20 16 2175 3.7 37 242 5.57 2.5 4420 500 NA NA <1 26.9 3300 3670 14.9 0.439 NA 32.2 22.4 1760 250 0.327 1700 0.516 MW-9D 05/21/2015 5.5 29.16 18 2175 0.39 -138 67 1.99 1.5 4620 470 NA NA <1 17.8 2170 3730 10.4 0.083 NA 14.8 31 1890 270 <0.2 1700 <0.3 MW-9D 12/09/2015 5.2 28.81 13 1980 0.22 197 402 8.9 0 5400 M1 501 <0.03 NA <0.5 8.1 680 3400 M1 5.5 0.52 NA 19.8 28.3 1900 242 <0.1 1350 <1 L3 MW-9D 01/20/2016 5.7 28.24 7 2034 0.5 142 347 0.9 0.5 5540 510 <0.03 NA <1 7.06 278 3660 4.46 0.417 NA 20.7 30 1740 280 <0.2 1400 <0.3 MW-11D 02/12/2015 5.9 9.13 7 602 5.67 38 243 5.37 2 88 130 NA NA 1.07 4.21 1870 503 3.7 2.3 NA <1 33 383 22 <0.2 350 1.21 MW-11D 05/20/2015 5.3 8.88 18 595 3.4 91 296 4.01 <0.5 65 130 NA NA <1 1.11 91 159 1.11 2.4 NA <1 35.8 333 18 <0.2 380 <0.3 MW-11D 12/08/2015 5.2 8.52 13 565 3.95 250 455 4.29 0 52 147 <0.03 NA <0.5 <0.5 53 120 <0.5 2.8 NA 0.6 42 310 16 <0.1 348 <1 MW-11D 01/18/2016 5.1 8.25 4 590 4.4 280 485 1.3 0 <50 150 0.091 NA <1 <1 196 134 <1 2.7 NA <1 39.3 296 16 <0.2 300 <0.3 MW-11D 04/07/2016 5.1 9.19 14 601 4.71 279 484 1.2 NM <50 160 0.13 NA <1 <1 74 140 <1 2.4 NA <1 42.9 326 13 <0.2 380 <0.3 MW-11D 07/08/2016 5.4 10.15 17 620 3.56 S 369 574 2.82 0 <50 160 0.28 NA <1 <1 76 149 <1 3.1 NA <1 43.4 356 16 <0.2 440 0.354 MW-12D 03/31/2015 5.5 35.78 19 94 3.04 72 277 7.93 <0.5 <50 8 NA NA 3.35 11 433 480 5.9 1.4 NA <1 7.66 24 7.2 <0.2 56 0.388 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-7 Transition Zone Exceedances Inc Prov BG Page 2 of 3 TABLE 4-7 TRANSITION ZONE EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Nickel Nitrate (as N)Nitrate Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg-N/L mg/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 700 250 0.07^0.07^10 1*300 50 100 10 10 20 NE NE 250 0.2*500 0.3* 5.6-6.7 NE NE NE NE NE NE NE NE NE 2.2 NE NE 56 5.6 1895 734 16 0.59 NE NE 14 41 8.5 NE 196 0.57 Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units Provisional Background MW-12D 05/21/2015 5.2 35.67 19 78 3.13 102 307 6.84 <0.5 <50 9.9 NA NA <1 2.15 118 155 1.27 1.4 NA <1 4.8 20 7.3 0.674 50 <0.3 MW-12D 12/09/2015 4.8 35.11 15 72 3.27 192 397 8.38 0 <50 8.6 0.1 NA 1.5 1.5 240 120 1.8 1.5 NA 0.58 <5 21 6 <0.1 44 D6 <1 L1 MW-12D 01/20/2016 5.3 34.23 7 72 3.3 268 473 6.2 0 <50 8.8 0.076 M1 NA 10.2 1.23 207 123 6.62 1.4 NA <1 3.79 21 7.1 <0.2 32 <0.3 MW-13D 02/12/2015 6.8 27.93 8 223 3.65 -11 194 7.28 <0.5 <50 4.4 NA NA <1 4.11 515 563 1.05 0.236 NA <1 4.62 92 4 <0.2 110 1.67 MW-13D 05/20/2015 6.6 29.91 18 165 0.5 -168 37 2.93 2.5 <50 4.4 NA NA <1 6.75 2780 1300 1.08 0.126 NA <1 5.17 114 1.9 <0.2 93 0.503 MW-13D 12/08/2015 9.8 29.47 15 128 0.27 -71 134 4.71 0 <50 4.1 <0.03 NA <0.5 1.2 820 290 <0.5 <0.02 NA <0.5 8.8 450 1.1 <0.1 131 <1 MW-13D 01/20/2016 6.7 27.39 9 132 0.46 -21 184 2.16 2.5 <50 4.6 <0.03 NA <1 4.69 3270 747 <1 0.053 NA <1 5.59 265 1.2 <0.2 69 <0.3 MW-15D 03/04/2015 6.2 4.85 14 132 1.53 48 253 4.33 <0.5 <50 7.3 NA NA <1 <1 202 167 <1 0.666 NA <1 6.94 108 0.67 <0.2 76 0.333 MW-15D 05/20/2015 5.7 6.90 15 94 2.78 72 277 1.83 <0.5 <50 7.7 NA NA <1 <1 109 87 <1 0.787 NA <1 6.49 99 0.29 <0.2 72 0.502 MW-15D 12/08/2015 6.4 4.84 14 118 0.61 185 390 8.35 0 <50 5.7 0.099 M1 NA <0.5 <0.5 310 93 <0.5 0.52 NA <0.5 7.58 120 <1 <0.1 81 <1 MW-15D 01/18/2016 6.3 4.42 7 114 1.5 185 390 2.5 0 <50 11 0.17 NA <1 <1 143 30 <1 0.793 NA <1 7.05 118 0.32 <0.2 75 0.736 MW-15D 04/08/2016 6.2 5.65 12 127 1.33 208 413 1.72 NM <50 19 0.15 NA <1 <1 141 25 <1 0.823 NA <1 8.19 144 0.34 <0.2 91 0.726 MW-15D 07/08/2016 5.7 7.11 17 105 2.64 S 355 560 2.27 0 <50 13 0.24 M1 NA <1 <1 52 16 <1 1.2 NA <1 7.05 114 0.24 <0.2 82 0.639 MW-18D 05/04/2015 5.8 7.50 13 874 1.35 115 320 4.26 2.5 807 88 NA NA <1 7.35 3530 1510 2.87 0.102 NA <1 15.2 321 260 <0.2 620 0.523 MW-18D 05/28/2015 6.1 8.27 17 914 0.78 -126 79 5.04 2 793 94 NA NA <1 4.61 6960 2870 1.89 0.077 NA <1 12.9 298 280 <0.2 650 <0.3 MW-18D 12/08/2015 5.8 6.22 14 878 0.7 260 465 4.76 3.5 850 96 <0.03 NA <0.5 5.5 6100 1300 2.4 0.09 NA <0.5 14.6 270 276 <0.1 662 <1 MW-18D 01/19/2016 6.0 6.22 8 890 2.4 115 320 4.2 2 884 97 <0.03 NA <1 4.44 1840 1290 2.49 0.077 NA <1 12.1 290 300 <0.2 610 <0.3 MW-18D 04/11/2016 5.7 7.45 13 917 1.32 170 375 9.54 NM 887 97 <0.03 NA <1 4.09 1620 1260 2.6 0.037 NA <1 13.8 291 280 <0.2 620 <0.3 MW-18D 07/07/2016 5.6 8.86 17 923 0.17 S 249 454 3.61 NM 875 99 <0.03 NA <1 3.4 3960 1290 2.24 0.082 NA <1 13.6 284 300 <0.2 660 <0.3 MW-21D 06/30/2015 6.2 2.77 19 301 4.6 -96 109 1.92 NM 79 21 NA <0.021 <1 1.66 4640 4560 1.25 0.199 NA 1.19 18.5 95 31 <0.2 170 <0.3 MW-21D 09/01/2015 6.4 3.95 28 1 6.9 224 429 2.12 4 95 24 NA <0.006 <1 <1 14900 2760 <1 0.022 M2 NA <1 15.8 77 24 <0.2 140 <0.3 MW-21D 12/08/2015 5.4 0.91 14 194 0.25 136 341 9.43 3 99 28.4 <0.03 NA <0.5 1.4 3000 820 1.1 0.052 NA <0.5 16.5 72 27.1 <0.1 128 <1 MW-21D 01/18/2016 5.2 0.60 9 185 0.51 152 357 8.42 1 95 29 <0.03 NA <1 1.09 2440 645 <1 0.042 NA <1 15.1 75 29 <0.2 110 <0.3 MW-21D 04/12/2016 5.1 1.99 15 185 0.75 170 375 9.05 NM 79 28 <0.03 NA <1 1.63 1980 B2 552 1.01 <0.01 NA <1 15 72 34 <0.2 130 <0.3 MW-21D 07/07/2016 5.1 3.50 21 181 0.29 S 268 473 7.26 NM 87 28 <0.03 NA <1 1.13 4030 586 <1 0.018 NA <1 15.4 73 31 <0.2 100 <0.3 MW-22D 06/30/2015 5.3 8.61 18 142 3.06 108 313 4.27 NM <50 24 NA 0.484 <1 2.5 184 132 6.1 0.286 NA <1 10.8 44 11 <0.2 90 <0.3 MW-22D 09/01/2015 5.1 11.01 19 136 2.84 188 393 1.03 0 <50 26 NA 0.432 <1 1.65 34 92 5.93 0.253 NA <1 10.5 42 9.8 <0.2 75 0.354 MW-22D 12/08/2015 5.3 1.72 15 193 2.94 118 323 0.74 0 <50 49.9 0.73 NA 0.72 0.82 <50 130 7 0.51 NA <0.5 15.9 72 8.2 0.13 152 <1 MW-22D 01/18/2016 5.1 1.70 13 182 4.01 128 333 0.61 0 <50 45 0.57 NA <1 <1 39 118 6.76 0.444 NA <1 14.1 65 10 <0.2 98 <0.3 MW-22D 04/11/2016 5.1 6.85 15 163 3.52 155 360 1.11 NM <50 35 0.75 M1 NA <1 <1 62 107 5.49 0.29 NA <1 12.7 55 11 0.209 98 <0.3 MW-22D 07/07/2016 4.6 10.53 16 144 3.85 312 517 1.64 NM <50 30 0.64 M1 NA <1 <1 48 92 4.9 0.258 NA <1 11.9 48 11 <0.2 90 0.342 MW-23DL 06/30/2015 7.1 5.55 19 281 0.46 -264 -59 4.97 NM <50 4 NA <0.021 <1 <1 11200 76 <1 <0.01 NA <1 9.41 119 22 <0.2 160 <0.3 MW-23DL 09/03/2015 7.1 6.98 22 278 0.29 -133 72 3.94 4 <50 3.3 NA <0.006 <1 <1 12300 82 <1 0.01 M2 NA <1 7.12 114 15 <0.2 160 0.345 MW-23DL 12/09/2015 7.0 5.22 14 270 0.16 -125 80 8.7 NM <50 3.7 <0.03 NA <0.5 <0.5 12100 77 <0.5 <0.02 NA <0.5 6.5 120 16.7 <0.1 157 <1 L3 MW-23DL 01/19/2016 7.1 4.66 6 268 0.36 -98 107 2.52 2.5 <50 4 <0.03 NA <1 <1 11600 87 <1 0.02 NA <1 6.85 119 22 <0.2 150 <0.3 MW-23DU 06/24/2015 5.6 5.20 19 145 2.24 67 272 1.45 NM 87 7.3 NA 0.022 <1 36.9 162 865 2.76 0.435 NA <1 11 48 26 <0.2 84 <0.3 MW-23DU 09/03/2015 5.5 8.29 19 124 2.33 185 390 1.29 NM 85 6.3 NA 0.065 <1 8.35 222 507 1.5 0.32 NA <1 9.4 38 23 <0.2 83 0.303 MW-23DU 12/09/2015 5.5 7.97 15 119 3.44 134 339 6.9 0 77 7 0.12 NA <0.5 6.7 260 340 1.3 0.5 NA <0.5 8.61 41 20.2 <0.1 71 <1 L1 MW-23DU 01/19/2016 5.6 7.62 11 109 4.29 126 331 4.84 0 84 8 0.15 NA <1 4.57 478 301 1.17 0.454 NA <1 8.62 38 20 <0.2 67 <0.3 MW-23DU DUP 01/19/2016 5.6 7.62 11 109 4.29 126 331 4.84 0 83 8.4 0.13 NA <1 4.68 429 297 1.14 0.45 NA <1 8.56 38 20 <0.2 83 <0.3 PZ-16 02/19/2014 5.8 48.71 18 443 3.8 331 NM 24.6 NM 874 8 NA NA 42 1.99 1850 156 21 NA NA 32.8 NA NA 140 <0.2 280 NA PZ-16 05/18/2015 5.8 49.02 21 326 3.95 114 319 21.7 <0.5 684 4.9 NA NA 11.5 1.31 877 83 5.35 2.1 NA 27 9.48 237 110 <0.2 210 1.29 Prepared by: BER Checked by: TDP/MCD Notes: - Concentration exceeds the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 or provisional background concentration (whichever is greater). Deg C = Degrees Celsius mV = Millivolts mg/L = Milligram per liter ORP = Oxidation Reduction Potential DO = Dissolved oxygen NTU = Nephelometric turbidity unit DUP = Duplicate NA = Not analyzed ug/L = Microgram per liter umhos/cm = Micro mhos per centimeter NE = Not established Temp = Temperature S.U. = Standard Unit ft = Feet mg - N/L = Milligram nitrogen per liter Spec Cond = Specific Conductance NM = Not measured ^ = NC DHHS Health Screening Level. < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10x the concentration in the method blank. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. D6 = The relative percent difference (RPD) between the sample and sample duplicate exceeded laboratory control limits. j = Indicates concentration reported below Practical Quantitation Limit (PQL), but above Method Detection Limit (MDL) and therefore concentration is estimated. L1 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high. M1 = Matrix Spike Recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. M2 = Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable. S = Associated calibration check did not meet specified criteria. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-7 Transition Zone Exceedances Inc Prov BG Page 3 of 3 TABLE 4-8 BEDROCK GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 700 250 0.07^0.07^10 1*300 50 20 NE NE 250 0.2*500 0.3* 6.1-8.9 NE NE NE NE NE NE NE NE NE NE NE 6.4 0.6 0.6+20 NE 3225 548 NE 12 122 4.4 NE 151 0.68 Sample ID Sample Collection Date AMW-3B 07/23/2014 6.5 7.97 18 88 2.89 163 NM 10.8 NM <1 <1 <50 0.58 NA NA <5 <5 131 17 <1 7.16 NA 1.7 <0.2 92 NA AMW-3B 11/04/2014 NM NM NM NM NM NM NM NM NM <1 <1 NA NA NA NA <1 <1 258 102 <1 8.21 NA NA <0.2 NA NA AMW-3B 05/12/2015 7.7 8.27 16 83 0.84 -69 136 6.86 <0.5 <1 <1 <50 <2.5 NA NA <1 <1 47 <5 <1 6.07 60 3.3 <0.2 72 0.344 AMW-3B 12/08/2015 6.1 8.24 14 73 4.3 40 245 8.56 0 <0.5 <0.5 <50 <1 0.21 NA <0.5 <0.5 <50 <5 <0.5 5.55 59 1.6 <0.1 95 <1 AMW-3B 01/20/2016 6.5 8.09 10 71 4.42 62 267 3.26 0 <1 <1 <50 0.61 0.18 NA <1 <1 20 <5 <1 5.05 58 1.3 <0.2 47 <0.3 AMW-3B 04/12/2016 6.4 8.05 14 71 4.6 69 274 1.78 NM <1 <1 <50 0.6 0.18 NA <1 <1 <10 B2 <5 <1 5.18 56 1.1 <0.2 67 <0.3 AMW-3B 04/28/2016 6.4 8.02 16 74 5.74 220 425 1.93 NM <1 <1 <50 0.6 NA NA <1 <1 NA NA <1 NA NA 0.99 <0.2 58 NA AMW-3B 07/08/2016 5.7 8.04 18 70 5.9 S 312 517 6.6 NM <1 <1 <50 0.65 0.22 NA <1 <1 13 <5 <1 5.12 57 1.1 <0.2 67 0.385 CB-9BR 04/27/2015 8.9 44.46 16 185 0.49 123 328 16.2 <0.5 <1 <1 <50 6.4 NA NA 8.25 <1 460 21 1.56 8.39 115 3.9 <0.2 130 3.03 CB-9BR 05/28/2015 6.5 48.57 16 135 0.36 69 274 10.8 <0.5 <1 <1 <50 6.4 NA 0.014 <1 <1 402 76 <1 4.76 98 1.8 <0.2 96 0.499 CB-9BR 09/08/2015 6.3 49.19 17 105 0.84 133 338 9.89 NM NA NA NA NA NA 0.12 NA NA NA NA NA NA NA NA NA NA NA CB-9BR 12/08/2015 6.6 47.95 14 100 0.55 65 270 7.06 NM <0.5 <0.5 L3 <50 6.1 0.092 NA 1.1 <0.5 460 46 <0.5 <5 68 1.4 <0.1 83 <1 CB-9BR 01/21/2016 6.4 47.30 10 99 0.7 63 268 8.3 0 <1 <1 <50 6.4 0.068 NA 9.08 <1 678 70 <1 3.47 71 1.2 <0.2 76 <0.3 CB-9BR 04/13/2016 6.1 46.93 15 98 0.52 57 262 8.71 NM <1 <1 <50 6.1 0.083 NA 1.3 <1 557 57 <1 3.48 65 1.5 <0.2 82 <0.3 CB-9BR 04/28/2016 6.2 47.21 15 99 0.5 197 402 8.58 NM <1 <1 <50 6.2 NA NA 1.18 <1 NA NA <1 NA NA 1.3 <0.2 66 NA CB-9BR 07/12/2016 6.1 47.58 19 91 0.65 259 464 9.1 0 <1 <1 <50 6.4 0.14 NA 1.5 <1 236 43 <1 4.27 65 1.3 <0.2 67 0.318 CB-9BR DUP 07/12/2016 6.1 47.58 19 91 0.65 259 464 9.1 0 <1 <1 <50 6.4 0.13 NA 1.85 <1 214 42 <1 3.47 65 1.3 <0.2 83 <0.3 ABMW-5BR 04/13/2015 6.4 23.88 15 221 0.86 90 295 1.57 4 <1 <1 <50 7.9 NA NA <1 1.45 17300 128 <1 7.12 115 17 <0.2 160 <0.3 ABMW-5BR 05/27/2015 7.2 24.25 18 301 0.29 -245 -40 57.4 2 <1 <1 <50 8.7 NA 0.013 10.5 4.21 11400 157 <1 18.3 210 19 <0.2 180 <0.3 ABMW-5BR 09/01/2015 9.4 25.35 21 287 0.7 -66 139 22.2 NM NA NA NA NA NA <0.006 NA NA NA NA NA NA NA NA NA NA NA ABMW-11BR 04/14/2016 8.4 111.54 17 288 0.38 20 225 33.7 NM <1 <1 <50 3.2 <0.03 NA 87.2 2.22 3470 85 <1 19.3 104 40 <0.2 190 2.31 ABMW-11BR 07/11/2016 8.1 83.95 22 282 0.36 90 295 9.7 NM <1 <1 <50 3.4 <0.03 NA 11.1 <1 766 98 <1 16.5 102 36 0.396 170 0.69 AMW-1B 08/05/2014 7.1 41.06 17 449 0.23 -102 NM 19.4 NM <1 <1 433 9.7 NA NA <5 <5 4990 392 <1 28 NA 130 <0.2 330 NA AMW-1B DUP 08/05/2014 7.1 41.06 17 449 0.23 -102 NM 19.4 NM <1 <1 433 9.7 NA NA <5 <5 4990 396 <1 28.3 NA 130 <0.2 340 NA AMW-1B 05/19/2015 7.1 41.41 18 430 0.41 -230 -25 8.96 3 <1 <1 422 9.3 NA NA <1 <1 6660 362 <1 22.1 85 120 <0.2 280 <0.3 AMW-1B 12/09/2015 7.1 40.90 16 374 0.2 -134 71 9.77 3 <0.5 <0.5 360 9.1 <0.03 NA <0.5 <0.5 6600 360 <0.5 24.5 71 109 <0.1 273 <1 AMW-1B DUP 12/09/2015 7.1 40.90 16 374 0.2 -134 71 9.77 3 <0.5 <0.5 350 9.1 <0.03 NA <0.5 <0.5 6200 350 <0.5 24.7 70 109 <0.1 246 <1 AMW-1B 01/20/2016 7.2 40.86 14 394 0.21 -124 81 9 4.5 <1 <1 393 9.8 <0.03 M1 NA <1 <1 8110 332 <1 21.2 83 120 <0.2 250 <0.3 AMW-1B DUP 01/20/2016 7.2 40.86 14 394 0.21 -124 81 9 4.5 <1 <1 402 9.9 <0.03 NA <1 <1 7580 353 <1 22.2 83 130 <0.2 260 <0.3 CB-4B 11/18/2010 NM 23.34 13 315 NM NM NM 2.26 NM <0.5 <5 <50 7.9 NA NA <5 NA 429 35.1 <10 NA NA 100 <0.1 219 NA CB-4B 04/10/2012 6.5 22.98 15 363 0.56 -58 147 2.62 NM <0.5 <5 <50 7.1 NA NA <5 NA 338 23.1 <10 NA NA 88.8 <0.1 198 NA CB-4B 07/16/2012 7.1 23.29 20 285 2.24 -41 165 1.87 NM <0.5 <5 <50 7.1 NA NA <5 NA 643 32.8 <10 NA NA 63.2 <0.1 169 NA CB-4B 11/15/2012 7.2 23.23 13 328 0.65 -12 193 1.27 NM <0.5 <5 <50 7 NA NA <5 NA 569 31.6 <10 NA NA 54.7 <0.1 146 NA CB-4B DUP 11/15/2012 7.2 23.23 13 328 0.65 -12 193 1.27 NM <0.5 <5 <50 6.9 NA NA <5 NA 498 30.8 <10 NA NA 55.9 <0.1 147 NA CB-4B 04/03/2013 7.1 22.98 14 302 0.34 -14 191 1.54 NM <1 7.31 <50 6.2 NA NA <5 NA 483 39 <1 NA NA 61 <0.2 170 NA CB-4B 07/01/2013 6.2 23.22 17 296 1.18 -32 173 1.76 NM <1 2.7 <50 5.7 NA NA <5 NA 335 42 <1 NA NA 63 <0.2 170 NA CB-4B 11/06/2013 6.9 23.67 15 286 0.4 37 242 5.1 NM <1 5.39 <50 6.5 NA NA <5 NA 398 45 <1 NA NA 63 <0.2 170 NA CB-4B 04/16/2014 7.2 23.66 14 348 0.3 18 223 1.9 NM <1 10.2 <50 6.6 NA NA <5 NA 529 42 <1 NA NA 68 <0.2 190 NA CB-4B 04/08/2015 7.1 24.35 18 257 0.74 -7 198 2.42 NM <1 1.62 <50 6.2 NA NA <5 <1 625 43 <1 16.4 NA 62 <0.2 180 NA CB-4B 07/07/2015 6.9 24.80 19 263 4.04 174 379 3.1 NM <1 <1 <50 6.2 NA NA <5 <1 315 41 <1 19 144 70 <0.2 170 0.699 CB-4B 11/04/2015 7.0 23.93 15 564 0.41 -183 22 1.91 NM <1 <1 <50 6.9 NA NA <5 <1 638 65 <1 35.4 B2 155 120 <0.2 220 0.353 CB-4B 12/09/2015 7.3 24.08 13 484 0.29 -130 75 2.57 0.5 <0.5 1.3 <50 6.2 <0.03 NA <0.5 B <0.5 1400 60 <0.5 34.1 160 75.5 <0.1 199 <1 CB-4B 01/19/2016 7.1 23.93 8 517 0.4 -106 99 1.68 1.5 <1 <1 <50 6.6 <0.03 NA <1 <1 1240 67 <1 18.2 129 69 <0.2 280 <0.3 Analytical Parameter Background Analytical Results Bedrock Field Parameters 15A NCAC 02L Standard Reporting Units Provisional Background P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-8 Bedrock Exceedances Inc Prov BG Page 1 of 4 TABLE 4-8 BEDROCK GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 700 250 0.07^0.07^10 1*300 50 20 NE NE 250 0.2*500 0.3* 6.1-8.9 NE NE NE NE NE NE NE NE NE NE NE 6.4 0.6 0.6+20 NE 3225 548 NE 12 122 4.4 NE 151 0.68 Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units Provisional Background CB-4B 04/05/2016 7.0 24.48 13 236 0.42 -11 195 2.18 NM <1 2.51 <50 6.5 NA NA <5 <1 723 59 <1 16.6 133 60 <0.2 140 <0.3 CB-4B 07/05/2016 7.1 25.45 23 241 0.98 51 256 4.9 NM <1 <1 <50 6.8 NA NA <5 <1 369 19 <1 15.1 128 62 <0.2 150 0.525 CB-8BR 05/11/2015 6.7 48.76 16 458 4.51 44 249 5.39 <0.5 <1 <1 343 47 NA NA 3.83 <1 311 633 3.93 8.79 251 34 <0.2 290 0.678 CB-8BR 05/22/2015 6.8 48.55 15 352 1.89 -55 150 9.14 <0.5 <1 <1 171 26 NA NA <1 <1 601 473 1.4 7.74 178 31 <0.2 210 0.437 CB-8BR 12/08/2015 7.2 48.65 15 269 0.32 -37 168 3.07 0.5 <0.5 <0.5 78 14 <0.03 NA <0.5 <0.5 840 420 <0.5 8.14 150 24.8 <0.1 212 <1 CB-8BR 01/20/2016 7.1 47.03 7 275 3.6 -19 187 8.8 0.5 <1 <1 87 14 <0.03 NA <1 <1 897 452 <1 7.45 148 26 <0.2 180 <0.3 GW-1BR 05/14/2015 7.0 23.71 19 162 2.42 57 262 4.72 1.5 <1 <1 <50 1.3 NA NA <1 <1 1780 93 <1 6.02 84 8.5 <0.2 110 0.575 GW-1BR 05/27/2015 7.8 22.67 20 171 2.13 -211 -6 11.3 <0.5 <1 <1 <50 1.5 NA 0.059 <1 <1 946 66 <1 6.25 88 8.3 <0.2 110 1.08 GW-1BR 09/01/2015 9.0 22.61 19 186 0.6 -56 149 1.5 NM NA NA NA NA NA 0.009 B NA NA NA NA NA NA NA NA NA NA NA GW-1BR 12/09/2015 8.7 22.30 15 163 0.5 -191 14 3.5 NM <0.5 1.1 <50 1.7 <0.03 NA <0.5 <0.5 1100 56 <0.5 8.33 98 3.7 <0.1 103 <1 L1 GW-1BR 01/18/2016 7.0 22.34 6 155 1 -81 124 2.43 NM <1 <1 <50 1.5 <0.03 NA <1 <1 1190 65 <1 7.28 88 5.2 <0.2 110 0.317 GW-2 12/14/2007 5.7 43.51 14 261 NM NM NM NM NM <5 8.3 322 <20 NA NA 31.1 NA 33200 NA <10 NA NA 69.1 0.10 200 NA GW-2 04/21/2008 5.4 43.26 15 266 NM NM NM NM NM <5 <5 386 17.1 NA NA <5 NA 7380 171 <10 NA NA 63.3 0.13 182 NA GW-2 10/13/2008 5.6 43.42 15 333 NM NM NM NM NM <5 <5 400 36.4 NA NA <5 NA 357 66.5 <10 NA NA 70.2 <0.1 204 NA GW-2 04/14/2009 5.5 43.36 15 361 NM NM NM NM NM <5 <5 418 55.5 NA NA <5 NA 286 90.1 <10 NA NA 66 <0.5 294 NA GW-2 10/16/2009 5.7 43.16 16 518 NM NM NM NM NM <5 <5 431 99 NA NA 7 NA 141 130 <10 NA NA 66.4 <0.5 312 NA GW-2 05/11/2010 5.4 42.90 16 620 NM NM NM NM NM <5 <5 377 151 NA NA <5 NA 460 141 <10 NA NA 70.1 <0.1 370 NA GW-2 02/18/2014 5.3 42.87 16 816 2.8 339 NM 4.32 NM <1 1 964 170 NA NA <5 6.9 56 1820 <1 NA NA 78 <0.2 600 NA GW-2 05/14/2015 5.5 42.95 18 900 2.99 77 282 6.81 <0.5 <1 1.02 1050 230 NA NA <1 11.9 115 1780 1.01 6.92 556 85 <0.2 720 <0.3 GW-2 12/10/2015 5.6 42.66 16 1012 2.7 246 451 4.49 0 <0.5 2.4 1400 222 0.072 NA 23 15.3 280 1700 2.4 <25 520 118 0.12 706 1.8 GW-2 01/20/2016 5.6 42.72 16 811 2.1 -97 108 9.98 NM <1 1.82 1720 210 0.05 M1 NA 52 11.5 472 2140 <1 6.83 675 120 <0.2 660 0.581 MW-1BR 05/11/2015 6.8 23.36 18 129 2.53 44 249 9.81 <0.5 <1 <1 <50 1.6 NA NA <1 <1 1370 64 <1 9.19 78 7.8 <0.2 110 <0.3 MW-1BR 05/21/2015 7.0 23.31 19 135 1.55 53 258 3.9 <0.5 <1 <1 <50 1.2 NA NA <1 <1 713 77 <1 6.83 75 8.2 <0.2 110 0.322 MW-1BR 12/09/2015 6.4 23.12 9 99 1 19 224 9.71 2 <0.5 <0.5 <50 1.8 <0.03 NA <0.5 <0.5 2500 73 <0.5 5.47 64 7.1 <0.1 73 <1 L3 MW-1BR 01/18/2016 6.6 22.59 5 102 1.1 -13 192 6.2 1.5 <1 <1 <50 1.7 <0.03 NA <1 <1 3020 75 <1 5.22 63 7.5 <0.2 56 <0.3 MW-2BR 04/13/2015 9.0 31.01 15 270 0.2 104 309 2.44 <0.5 <1 <1 67 5.7 NA NA 2.1 <1 95 25 <1 16.5 79 59 <0.2 200 0.372 MW-2BR 05/21/2015 8.8 31.34 15 274 0.19 67 272 2 <0.5 <1 <1 64 5.4 NA NA <1 <1 61 25 <1 16.8 75 56 <0.2 180 0.373 MW-5BR 05/04/2015 8.1 17.89 21 376 0.12 36 241 14.5 4 <1 <1 418 6.6 NA NA <1 <1 18800 172 <1 15.5 318 120 <0.2 250 0.368 MW-5BR 05/28/2015 6.9 19.23 16 422 0.29 26 231 4.6 1.5 <1 <1 454 8.4 NA NA <1 <1 27900 244 <1 18.1 328 140 0.287 260 <0.3 MW-5BR 12/09/2015 7.0 15.88 14 380 0.27 -115 90 4.85 1.5 <0.5 <0.5 390 7.7 <0.03 NA <0.5 <0.5 31500 210 <0.5 17.1 250 108 <0.1 245 <1 L1 MW-5BR 01/19/2016 7.0 15.79 10 378 0.3 -105 100 4.95 4 <1 <1 360 8.9 <0.03 NA <1 <1 29800 221 <1 16.9 211 120 <0.2 230 <0.3 MW-6BR 02/22/2016 8.9 1.50 15 197 0.54 -84 121 1.04 0 <1 <1 112 3.9 0.053 NA <1 <1 25 <5 <1 22.2 35 48 <0.2 140 <0.3 MW-9BR 05/04/2015 7.2 31.98 19 1022 4.39 -22 183 14.9 <0.5 <1 <1 490 190 NA NA <1 <1 1570 247 <1 24.7 697 86 <0.2 760 0.379 MW-9BR 05/21/2015 6.7 31.90 20 1039 3.01 -107 98 15.5 1.5 <1 <1 530 200 NA NA <1 <1 2540 317 <1 24.6 746 87 <0.2 860 <0.3 MW-9BR 12/09/2015 7.0 31.28 14 1259 0.21 -119 86 3.37 2.5 <0.5 0.84 960 313 <0.03 NA <0.5 0.76 5100 430 <0.5 32.2 1100 106 <0.1 914 <1 L3 MW-9BR 01/20/2016 7.2 30.67 5 1367 0.7 -123 82 3 2 <1 <1 1160 300 <0.03 NA <1 <1 7740 631 <1 30.9 1100 120 <0.2 890 <0.3 MW-9BR 04/25/2016 7.1 31.05 18 1492 0.23 -77 128 5.47 NM <1 <1 1570 330 NA NA <1 <1 NA NA <1 NA NA 130 <0.2 1100 NA MW-13BR 03/03/2015 6.4 28.00 11 104 4.55 8 213 8.04 <0.5 <1 <1 <50 4.6 NA NA <1 1.7 335 268 <1 2.64 31 2.1 <0.2 67 0.879 MW-13BR DUP 03/03/2015 6.4 28.00 11 104 4.55 8 213 8.04 <0.5 <1 <1 <50 4.6 NA NA <1 1.74 319 269 <1 2.68 30 2 <0.2 58 0.82 MW-13BR 05/20/2015 5.4 30.03 18 52 2.53 53 258 3.16 <0.5 <1 <1 <50 4.4 NA NA <1 <1 76 105 <1 2.23 18 1.6 <0.2 34 <0.3 MW-13BR 12/08/2015 5.8 29.57 15 43 2.95 148 353 0.78 0 <0.5 <0.5 L3 <50 4.8 <0.03 NA <0.5 0.55 <50 33 <0.5 <5 16 1.7 <0.1 52 <1 MW-13BR 01/20/2016 5.5 27.43 9 48 3.54 100 305 0.29 0 <1 <1 <50 5 0.25 NA <1 <1 22 25 <1 2.26 16 1.8 <0.2 <25 <0.3 MW-14BR 02/13/2015 7.0 16.44 8 524 4.71 9 214 2.6 <0.5 <1 <1 421 6.9 NA NA <1 <1 76 216 16.5 13.6 295 160 <0.2 350 0.528 MW-14BR 05/20/2015 6.8 13.74 16 595 1.83 65 270 3.05 <0.5 <1 <1 386 6.3 NA NA <1 <1 31 31 13.8 9.86 307 170 <0.2 390 <0.3 MW-14BR 12/09/2015 6.7 12.25 13 604 1.3 227 432 6.22 0 <0.5 <0.5 360 5.4 0.07 NA <0.5 <0.5 52 44 9.3 9.46 350 210 <0.1 425 <1 L3 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-8 Bedrock Exceedances Inc Prov BG Page 2 of 4 TABLE 4-8 BEDROCK GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 700 250 0.07^0.07^10 1*300 50 20 NE NE 250 0.2*500 0.3* 6.1-8.9 NE NE NE NE NE NE NE NE NE NE NE 6.4 0.6 0.6+20 NE 3225 548 NE 12 122 4.4 NE 151 0.68 Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units Provisional Background MW-14BR 01/18/2016 6.9 10.52 2 598 3.3 160 365 0.8 0 <1 <1 352 6.2 0.15 NA <1 <1 57 16 9.05 8.99 282 190 <0.2 390 0.333 MW-16BR 03/11/2015 6.3 9.67 13 529 0.43 -63 142 9.7 3 <1 <1 109 120 NA NA <1 3.49 60100 852 <1 21.8 290 31 <0.2 290 <0.3 MW-16BR 05/28/2015 5.9 10.10 15 515 0.12 -165 40 4.14 2.5 <1 <1 117 120 NA NA <1 1.61 56900 715 <1 19.5 266 36 <0.2 310 <0.3 MW-16BR 12/08/2015 6.0 8.77 15 532 0.3 -13 192 2.97 3 <0.5 <0.5 L1 230 118 <0.03 NA <0.5 0.62 53900 720 <0.5 22.2 280 38.1 <0.1 345 <1 MW-16BR 01/19/2016 6.0 8.81 5 556 0.7 -37 168 1.2 2.5 <1 <1 216 130 <0.03 NA <1 <1 58200 757 <1 20.2 278 39 <0.2 310 <0.3 MW-16BR 04/08/2016 6.0 9.49 13 511 0.19 37 242 0.85 NM <1 <1 140 120 <0.03 NA <1 <1 52500 678 <1 21.1 259 35 <0.2 280 <0.3 MW-16BR 07/08/2016 6.0 10.44 16 525 0.21 S 69 274 0.9 6 <1 <1 150 120 <0.6 D3 NA <1 <1 59000 753 <1 21.8 280 41 <0.2 300 <0.3 MW-18BR 05/04/2015 5.9 7.92 16 923 1.4 123 328 5.39 <0.5 <1 <1 892 97 NA NA <1 <1 92 227 1.4 15.5 443 260 <0.2 660 0.554 MW-18BR 05/28/2015 5.7 8.45 17 900 0.81 2 207 1.95 <0.5 <1 <1 851 96 NA NA <1 1.02 125 313 <1 15.2 415 290 <0.2 660 <0.3 MW-18BR 12/08/2015 5.6 6.75 13 889 0.6 297 502 0.99 0 <0.5 <0.5 L3 900 96.4 0.065 NA <0.5 0.98 <50 200 0.59 15.5 400 278 <0.1 659 <1 MW-18BR 01/19/2016 5.8 6.70 8 913 0.5 191 396 0.9 0 <1 <1 974 99 0.056 M1 NA <1 <1 10 221 <1 14 436 290 <0.2 630 <0.3 MW-18BR 04/11/2016 5.6 7.80 14 932 0.54 147 352 0.43 NM <1 <1 906 97 0.043 NA <1 1.14 14 216 <1 14.6 413 290 <0.2 650 <0.3 MW-18BR 07/07/2016 5.6 8.90 19 903 0.42 S 349 554 1.06 NM <1 <1 927 98 <0.03 NA <1 2.1 <10 326 <1 14.3 419 300 <0.2 650 0.34 MW-22BR 06/30/2015 6.4 14.56 17 291 0.78 -130 75 5.69 NM <1 <1 <50 38 NA <0.021 <1 <1 16000 324 <1 16 121 25 <0.2 170 <0.3 MW-22BR 09/01/2015 6.5 15.97 20 294 0.51 -47 158 2.63 5.5 <1 <1 <50 36 NA <0.006 <1 <1 18800 302 <1 18.1 105 22 <0.2 150 0.347 MW-22BR 12/08/2015 6.0 12.53 14 275 0.28 5 210 0.36 3.5 <0.5 <0.5 L3 <50 49.8 <0.03 NA <0.5 <0.5 14400 250 <0.5 18.8 97 18.6 <0.1 180 <1 MW-22BR 01/18/2016 5.9 12.30 13 259 0.18 23 228 3.74 5.5 <1 <1 <50 51 <0.03 NA <1 <1 14700 262 <1 17 98 20 <0.2 140 <0.3 MW-22BR 04/11/2016 5.9 13.70 15 266 0.13 52 257 9.72 NM <1 <1 <50 49 <0.03 NA <1 <1 16900 310 <1 16 101 19 <0.2 160 <0.3 MW-22BR 07/07/2016 5.4 15.60 17 254 0.19 S 82 287 8.47 NM <1 <1 <50 48 <0.03 NA <1 <1 14500 316 <1 15.3 98 19 <0.2 150 <0.3 PZ-1D 12/14/2006 7.0 43.00 16 1 NM NM NM NM NM 10.8 <2 272 20 NA NA <2 NA 4540 1230 <2 92 NA 250 4.4 595 NA PZ-17D 12/14/2006 5.9 50.61 14 0 NM NM NM NM NM <2 <2 762 6.7 NA NA <2 NA 2750 47.9 44.6 9 NA 110 <4 267 NA PZ-17D 06/12/2007 7.3 50.51 16 403 NM NM NM NM NM <0.1 1.5 677 8.44 NA NA 0.14 NA 200 60.8 46.7 NA NA 121 0.053 305 NA PZ-17D 02/18/2014 5.8 53.04 15 518 0.35 298 NM 6.4 NM <1 <1 967 11 NA NA 8 <1 369 49 20.1 NA NA 160 <0.2 340 NA PZ-17D 05/15/2015 5.8 56.41 16 481 0.77 39 244 9.74 <0.5 <1 <1 889 9.4 NA NA 8.66 <1 450 48 22.2 11.1 315 140 <0.2 320 <0.3 PZ-17D 12/09/2015 5.6 54.94 15 439 0.65 165 370 5.59 0 <0.5 <0.5 840 8 0.084 NA 2.4 0.67 220 17 25.9 10.6 310 137 <0.1 297 <1 L1 PZ-17D 01/20/2016 6.1 54.37 11 376 0.53 -103 102 9.92 0 <1 <1 846 8.5 0.12 NA 47.5 1.19 363 31 20.3 10.1 281 150 <0.2 290 0.427 PZ-17D 04/26/2016 5.9 56.68 16 448 3.74 255 460 5.8 NM <1 <1 869 7.1 NA NA <1 4.17 NA NA 29.2 NA NA 140 <0.2 290 NA PZ-17S 12/14/2006 6.3 28.99 14 0 NM NM NM NM NM <2 <2 102 2.8 NA NA <2 NA <20 315 14.8 3.8 NA 49 <4 125 NA PZ-17S 06/12/2007 7.2 28.64 15 146 NM NM NM NM NM 0.57 0.47 66.5 3.5 NA NA <16 NA 319 139 18.3 NA NA 36.1 0.22 95 NA PZ-17S 05/15/2015 5.4 27.44 17 71 5.89 173 378 1.38 <0.5 <1 <1 <50 1.9 NA NA <1 <1 17 24 11 2.74 122 19 <0.2 44 <0.3 PZ-17S 12/09/2015 4.9 27.00 14 63 6.87 157 362 1.76 0 <0.5 <0.5 <50 2.1 0.12 NA <0.5 0.76 <50 20 9.9 <5 120 16.5 <0.1 42 <1 L3 PZ-17S 01/20/2016 5.7 27.14 11 53 6.3 164 369 1.82 0 <1 <1 <50 1.8 0.12 NA <1 <1 40 19 6.48 2.62 96 14 <0.2 35 <0.3 AS-4 02/06/2014 6.2 13.45 11 334 0.7 85 NM 33.3 NM NA <1 108 NA NA NA NA NA 19200 783 NA NA NA NA <0.2 NA NA AS-4 08/05/2014 4.7 NM 16 436 2.44 257 NM 29.2 NM <1 1.44 <50 80 NA NA <5 116 4110 1670 <1 34.5 NA 79 <0.2 270 NA AS-4 02/11/2016 4.5 12.97 12 454 3.82 381 586 9.83 NM <1 1.62 <50 76 <0.03 M1 NA <1 128 2450 1880 <1 39 203 84 <0.2 280 <0.3 AS-5 (Duke)02/09/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 8.1 NA NA <5 <1 87 13 <1 5.31 57 1.4 <0.2 54 <0.3 AS-5 (Vendor)02/09/2015 5.1 NM 15 73 6.2 NM NM 1.1 NM <1 <5 <100 7.75 <10 NA <1 <1 84 12 <5 5.1 60 1.32 <0.1 44 <0.3 AS-6 02/11/2016 6.9 8.70 13 369 0.19 -153 52 22.2 NM <1 <1 79 56 <0.03 NA <1 <1 17300 491 <1 15.9 116 19 <0.2 220 <0.3 AS-9 (Duke)02/09/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 2.5 NA NA <5 <1 <10 <5 <1 6.97 77 5.3 <0.2 93 <0.3 AS-9 (Vendor)02/09/2015 6.2 NM 16 128 4.1 NM NM <1 NM <1 <5 <100 2.17 <10 NA <1 <1 <50 <5 <5 6.4 84 4.68 <0.1 81 <0.3 AS-9 05/12/2016 6.6 NM 15 135 3.89 195 400 0.28 NM <1 <1 <50 2.3 0.077 NA <1 <1 12 <5 <1 7.83 76 4.5 <0.2 84 <0.3 AS-11 (Duke)03/04/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 55 NA NA <5 <1 <10 5 <1 72 226 330 <0.2 590 <0.3 AS-11 (Vendor)03/04/2015 8.6 NM 15 713 2 NM NM <1 NM <1 <1 <500 56 <10 NA <1 <1 <50 <5 <1 72 210 340 <1 560 <5 AS-11 (Duke)07/31/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 52 NA NA <5 <1 59 12 <1 68.5 213 300 <0.2 570 <0.3 Water Supply Wells P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-8 Bedrock Exceedances Inc Prov BG Page 3 of 4 TABLE 4-8 BEDROCK GROUNDWATER EXCEEDANCES INCORPORATING PROVISIONAL BACKGROUND ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC pH Water Level Temp Spec Cond DO ORP Eh Turbidity Ferrous Iron Antimony Arsenic Boron Chloride Chromium (VI) Chromium (VI) Speciation Chromium Cobalt Iron Manganese Selenium Sodium Strontium Sulfate Thallium Total Dissolved Solids Vanadium S.U.ft Deg C umhos/cm mg/L mV mV NTUs mg/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L mg/L ug/L mg/L ug/L 6.5-8.5 NE NE NE NE NE NE NE NE 1*10 700 250 0.07^0.07^10 1*300 50 20 NE NE 250 0.2*500 0.3* 6.1-8.9 NE NE NE NE NE NE NE NE NE NE NE 6.4 0.6 0.6+20 NE 3225 548 NE 12 122 4.4 NE 151 0.68 Sample ID Sample Collection Date Analytical Parameter Analytical ResultsField Parameters 15A NCAC 02L Standard Reporting Units Provisional Background AS-11 05/09/2016 8.5 NM 17 838 1.15 17 222 0.48 NM <1 <1 54 54 <0.03 NA <1 <1 25 10 <1 64.6 232 320 <0.2 570 <0.3 AS-13 (Duke)06/26/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 80 NA NA <5 <1 445 5 <1 75.7 359 380 <0.2 690 <0.3 AS-13 (Vendor)06/26/2015 7.6 NM 15 990 0.03 NM NM 1.9 NM <0.5 <0.5 38.6 83.9 <0.03 NA <0.5 <0.5 108 5.1 <0.5 77.9 342 356 <0.1 696 <1 AS-13 05/09/2016 8.1 114.00 16 1042 0.44 17 222 1.06 NM <1 <1 63 85 <0.03 NA <1 <1 295 <5 <1 74.5 373 420 <0.2 710 0.47 AS-14 (Duke)06/26/2015 NM NM NM NM NM NM NM NM NM <1 <1 333 9.7 NA NA <5 <1 18 231 <1 18 404 240 <0.2 520 <0.3 AS-14 (Vendor)06/26/2015 7.6 NM 20 709 7.79 NM NM <1 NM <0.5 <0.5 325 10.4 <0.03 NA <0.5 <0.5 <50 240 <0.5 18.8 426 243 <0.1 526 <1 AS-14 (Duke)12/29/2015 NM NM NM NM NM NM NM NM NM <1 <1 312 9.6 NA NA <5 <1 509 185 <1 18.9 438 240 <0.2 520 <0.3 AS-14 (Vendor)12/29/2015 7.4 NM 15 704 1.04 NM NM 3.8 NM <0.5 <0.5 310 10.3 <0.03 NA <0.5 <0.5 568 200 <0.5 20.7 491 228 <0.1 504 <1 AS-14 05/11/2016 7.6 NM 15 713 4.63 48 253 0.16 NM <1 <1 339 9.5 <0.03 NA <1 <1 695 221 <1 19.2 480 250 <0.2 510 <0.3 AS-15 (Duke)08/07/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 2 NA NA <5 <1 <10 13 <1 2.97 43 1.1 <0.2 44 <0.3 AS-15 (Vendor)08/07/2015 5.7 NM 17 58 7.62 NM NM <1 NM <0.5 <0.5 <5 2.3 <0.3 NA <0.5 <0.5 <50 13.5 <0.5 3.22 44.5 2.1 <0.1 47 <1 AS-16 (Vendor)09/30/2013 NM NM NM NM NM NM NM <1 NM NA <2 <50 7.9 NA NA <10 NA <50 11 <5 7.1 NA <2 <2 54 NA AS-17 (Duke)08/14/2015 NM NM NM NM NM NM NM NM NM <1 <1 <50 0.55 NA NA <5 <1 510 16 <1 5.59 62 6.4 <0.2 74 <0.3 AS-17 (Vendor)08/14/2015 6.4 NM 15 77 1.06 NM NM 1.2 NM <0.5 <0.5 <5 <1 <0.03 NA <0.5 <0.5 379 14.6 <0.5 5.15 54.7 6.5 <0.1 65 <1 AS-20 (Duke)11/25/2015 NM NM NM NM NM NM NM NM NM <1 <1 149 19 NA NA <5 <1 124 42 <1 25.6 323 170 <0.2 370 <0.3 AS-20 (Vendor)11/25/2015 7.5 NM 12 552 0.29 NM NM <1 NM <0.5 <0.5 <5 20.6 <0.03 NA <0.5 <0.5 <50 37.3 <0.5 25.1 301 420 <0.1 388 <1 AS-20 06/06/2016 7.5 79.00 15 473 4.3 67 272 6.9 NM <1 <1 108 20 <0.03 NA <1 <1 1630 33 <1 22.6 275 150 <0.2 320 <0.3 DW-6 08/05/2014 6.0 NM 16 102 8.12 129 NM 148 NM <1 <1 <50 1.4 NA NA <5 <5 4060 85 <1 7.83 NA 0.25 <0.2 90 NA DW-6 02/11/2016 6.6 6.92 13 161 0.28 -94 111 71 NM <1 <1 <50 1.6 <1.5 NA <1 <1 28000 607 <1 7.71 94 0.46 <0.2 68 <0.3 Prepared by: BER Checked by: TDP/MCD Notes: Spec Cond = Specific Conductance Deg C = Degrees Celsius NTU = Nephelometric turbidity unit DUP = Duplicate umhos/cm = Micro mhos per centimeter NE = Not established S.U. = Standard Unit mg/L = Milligram per liter DO = Dissolved oxygen ft = Feet mV = Millivolts ORP = Oxidation Reduction Potential NA = Not analyzed ug/L = Microgram per liter ^ = NC DHHS Health Screening Level NM = Not measured Temp = Temperature Eh = Redox Potential < = Concentration not detected at or above the reporting limit * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 10x the concentration in the method blank. B2 = Target analyte was detected in blank(s) at a concentration greater than 1/2 the reporting limit but less than the reporting limit. Analyte concentration in sample is valid and may be used for compliance purposes. D3 = Sample was diluted due to the presence of high levels of non-target analytes or other matrix interference. L1 = Analyte recovery in the laboratory control sample (LCS) was above QC limits. Results may be biased high. L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. M1 = Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery. S = Associated calibration check did not meet specified criteria. + = Chromium (VI)speciation samples were analyzed using IC-ICP-DRC-MS method as opposed to ICP-MS method and were not analyzed in background wells. Chromium (VI) PBC is based on background samples analyzed using ICP-MS method. Therefore, Chromium (VI) PBC is used for comparison only to speciation analytical results. Data not used in provisional background concentration determinations. - Concentration exceeds the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 or provisional background concentration (whichever is greater). P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-8 Bedrock Exceedances Inc Prov BG Page 4 of 4 TABLE 4-9 ALLUVIAL BACKGROUND CONCENTRATION UPPER PREDICTION LIMITS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Constituent Reporting Units Number of Samples Number of Detected Samples Minimum Detected Concentration Maximum Detected Concentration Mean Statistical Method UPL (9 Future Samples) UPL (12 Future Samples) Antimony ug/L 7 0 ------------------ Arsenic ug/L 8 0 ------------------ Beryllium ug/L 5 1 ---0.22 ------------ Boron ug/L 7 0 ------------------ Cadmium ug/L 8 0 ------------------ Chloride mg/L 7 7 4 14 10 95% WH Approx. Gamma UPL 30.37 32.4 Chromium (hexavalent)ug/L 3 3 0.12 0.17 0.143 95% UPL (t) (lognormal)0.945 1.273 Chromium ug/L 8 0 ------------------ Cobalt ug/L 7 6 2.12 6.11 3.715 95% WH Approx. Gamma UPL 10.33 10.97 Iron ug/L 8 8 54 1,040 383.8 95% WH Approx. Gamma UPL 3,725 4,145 Manganese ug/L 8 8 142 573 318.1 95% WH Approx. Gamma UPL 1,324 1,425 Nickel ug/L 8 5 2.44 3.1 2.834 95% WH Approx. Gamma UPL 3.717 3.779 Nitrate mg/L 2 2 0.16 0.42 0.29 --------- Selenium ug/L 8 0 ------------------ Sodium mg/L 6 6 3.27 5.09 4.113 95% WH Approx. Gamma UPL 8.2 8.588 Strontium ug/L 4 4 24 25 24.25 95% UPL (t) (normal)27.39 27.73 Sulfate mg/L 7 7 0.29 0.63 0.44 95% WH Approx. Gamma UPL 1.124 1.188 Thallium ug/L 8 1 ---0.13 ------------ Total Dissolved Solids mg/L 7 7 40 91 52.57 95% WH Approx. Gamma UPL 134.7 142.4 Vanadium ug/L 4 0 ------------------ Zinc ug/L 8 8 12 85 25.5 95% UPL (np)85 85 Prepared by: MCD Checked by: HHS Notes: UPL - Upper Prediction Limit NP - Non-parametric Gamma - Gamma data transformation Lognormal - Lognormal data transformation mg/L = milligrams per liter ug/L = micrograms per liter P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-9 GW Alluvial Background Concentration Upper Prediction Limits Page 1 of 1 TABLE 4-10 SAPROLITE BACKGROUND CONCENTRATION UPPER PREDICTION LIMITS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Constituent Reporting Units Number of Samples Number of Detected Samples Minimum Detected Concentration Maximum Detected Concentration Mean Statistical Method UPL (12 Future Samples) UPL (24 Future Samples) Antimony ug/L 38 0 ------------------ Arsenic ug/L 38 0 ------------------ Beryllium ug/L 20 2 0.23 0.29 0.26 95% KM Chebyshev UPL 0.394 0.394 Boron ug/L 37 0 ------------------ Cadmium ug/L 38 0 ------------------ Chloride mg/L 38 17 1.4 14 5.749 95% UPL (np)14 14 Chromium (hexavalent)ug/L 12 9 0.031 0.31 0.186 95% WH Approx. Gamma UPL 1 1.192 Chromium ug/L 38 4 0.78 15 5.77 95% WH Approx. Gamma UPL 7.275 9.011 Cobalt ug/L 20 13 0.78 2.36 1.57 95% WH Approx. Gamma UPL 4.306 4.814 Iron ug/L 38 35 23 2,880 537.2 95% WH Approx. Gamma UPL 3,670 4,293 Manganese ug/L 37 37 6 170 51.71 95% WH Approx. Gamma UPL 204.6 229.1 Nickel ug/L 38 12 0.75 10 2.268 95% KM Chebyshev UPL 8.647 8.647 Nitrate mg/L 25 25 0.29 1.8 0.593 95% UPL (np)1.8 1.8 Selenium ug/L 38 2 1.12 1.22 1.17 95% KM Chebyshev UPL 1.26 1.26 Sodium mg/L 20 15 0.993 4.15 3.011 95% UPL (np)5 5 Strontium ug/L 17 13 7 37 22.46 95% UPL (np)37 37 Sulfate mg/L 37 24 0.11 0.66 0.283 95% WH Approx. Gamma UPL 1.135 1.284 Thallium ug/L 38 1 ---0.12 ------------ Total Dissolved Solids mg/L 38 19 25 93 44.16 95% WH Approx. Gamma UPL 231.9 274.9 Vanadium ug/L 18 2 0.763 1.33 1.047 95% KM Chebyshev UPL 1.544 1.544 Zinc ug/L 37 29 8 77 20.22 95% WH Approx. Gamma UPL 117.6 137.1 Prepared by: MCD Checked by: HHS Notes: UPL - Upper Prediction Limit NP - Non-parametric Gamma - Gamma data transformation Lognormal - Lognormal data transformation mg/L = milligrams per liter ug/L = micrograms per liter P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-10 Saprolite Background Concentration Upper Prediction Limits Page 1 of 1 TABLE 4-11 TRANSITION ZONE BACKGROUND CONCENTRATION UPPER PREDICTION LIMITS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Constituent Reporting Units Number of Samples Number of Detected Samples Minimum Detected Concentration Maximum Detected Concentration Mean Statistical Method UPL (3 Future Samples) UPL (6 Future Samples) Boron ug/L 5 0 ------------------ Chloride ug/L 5 5 0.83 1.3 1.068 95% WH Approx. Gamma UPL 1.909 2.168 Chromium (hexavalent)ug/L 3 0 ------------------ Chromium ug/L 5 4 1.27 7.04 3.135 95% WH Approx. Gamma UPL 35.85 55.66 Cobalt ug/L 5 5 1.66 3.08 2.444 95% WH Approx. Gamma UPL 4.811 5.568 Iron ug/L 5 5 231 610 445.4 95% WH Approx. Gamma UPL 1,490 1,895 Manganese ug/L 5 5 93 286 187.2 95% WH Approx. Gamma UPL 584 733.9 Nickel ug/L 5 5 2.07 6.03 3.898 95% WH Approx. Gamma UPL 12.55 15.85 Nitrate as N mg-N/L 5 5 0.036 0.165 0.0884 95% WH Approx. Gamma UPL 0.438 0.592 Selenium ug/L 5 0 ------------------ Sodium mg/L 5 4 1.78 5.63 3.555 95% WH Approx. Gamma UPL 10.87 13.72 Strontium ug/L 5 5 14 25 18.8 95% WH Approx. Gamma UPL 35.94 41.37 Sulfate mg/L 5 5 2.2 4.6 3.18 95% WH Approx. Gamma UPL 7.163 8.504 Thallium ug/L 5 0 ------------------ Total Dissolved Solids mg/L 5 4 37 67 45.5 95% WH Approx. Gamma UPL 151.5 196.3 Vanadium ug/L 5 2 0.34 0.416 0.378 95% KM Chebyshev UPL 0.565 0.565 Zinc ug/L 5 5 15 24 18.4 95% WH Approx. Gamma UPL 34.3 39.28 Prepared by: MCD Checked by: HHS Notes: UPL - Upper Prediction Limit NP - Non-parametric Gamma - Gamma data transformation Lognormal - Lognormal data transformation mg/L = milligrams per liter mg-N/L = milligrams nitrogen per liter ug/L = micrograms per liter P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-11 Transition Background Concentration Upper Prediction Limits Page 1 of 1 TABLE 4-12 BEDROCK BACKGROUND CONCENTRATION UPPER PREDICTION LIMITS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Constituent Reporting Units Number of Samples Number of Detected Samples Minimum Detected Concentration Maximum Detected Concentration Mean Statistical Method UPL (3 Future Events) UPL (9 Future Events) Boron ug/L 9 0 ------------------ Chloride mg/L 9 7 0.58 6.4 3.827 95% UPL (np)6.4 6.4 Chromium (hexavalent)ug/L 6 6 0.068 0.21 0.136 95% WH Approx. Gamma UPL 0.431 0.599 Chromium ug/L 10 3 1.1 9.08 3.827 95% WH Approx. Gamma UPL 11.41 19.74 Cobalt ug/L 10 0 ------------------ Iron ug/L 10 8 20 678 319.1 95% WH Approx. Gamma UPL 2,084 3,225 Manganese ug/L 10 6 17 102 61.33 95% WH Approx. Gamma UPL 348 548.3 Selenium ug/L 10 0 ------------------ Sodium mg/L 10 9 3.47 8.21 5.437 95% WH Approx. Gamma UPL 10.21 11.99 Strontium ug/L 8 8 56 98 66.88 95% WH Approx. Gamma UPL 107.5 122.3 Sulfate mg/L 9 9 1.1 3.3 1.656 95% WH Approx. Gamma UPL 3.595 4.36 Thallium ug/L 10 0 ------------------ Total Dissolved Solids mg/L 9 9 47 96 78.89 95% WH Approx. Gamma UPL 132.4 151.3 Vanadium ug/L 8 2 0.344 0.499 0.422 95% KM Chebyshev UPL 0.677 0.677 Zinc ug/L 10 4 7 32 17 95% WH Approx. Gamma UPL 78.8 133.8 Prepared by: MCD Checked by: HHS Notes: UPL - Upper Prediction Limit NP - Non-parametric Gamma - Gamma data transformation Lognormal - Lognormal data transformation mg/L = milligrams per liter ug/L = micrograms per liter P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\19.EG_CSASUP\Tables\Table 4-12 Bedrock Background Concentration Upper Prediction Limits Page 1 of 1