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Home My WebLink AboutMayo_BG GW Analytical Results March 2017_20171005TABLE 1 UPDATED BACKGROUND GROUNDWATER ANALYTICAL RESULTS THROUGH MARCH 2O17 MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter pH Turbidity Alkalinity Aluminum Antimony Arsenic Barium Beryllium Bi- carbonate Alkalinity Boron Cadmium Calcium Carbonate Alkalinity Chloride Chromium (VI) Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Reporting Units S.U. NTUs 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 mg/L ug/L ug/L 15A NCAC 02L Standard 6.5-8.5 NE NE NE 1* 10 700 4* NE 700 2 NE NE 250 10 10 1* 1000 300 15 NE 50 1 Sample ID Sample Collection Date Field Parameters Analytical Results Surficial MWn 2S 06 i1 8 i201 5 5-.-7 44�-.6 -1-4 242 _<4 _<4 z24 _<4 -1-4 _<� _<4 z 36 3-4- 4-.6-1- 4-4g _<4 245 _<4 0.643 2-&7 < 5 MW-12S 09/ 10/2015 5.8 6.31 13 98 <1 <1 19 <1 13 <50 <1 1.77 < 3.1 - 3.23 1.02 <1 108 <1 0.723 253 <0.05 MW-12S 12/02/2015 5.7 6.9 12 164 <1 <1 16 <1 12 <50 <1 1.56 < 3.3 0.043 747 <1 <1 336 <1 0.792 152 <0.05 M2S 01 07 i2 01 c -. 8 9-.8-9 ii.i 2-2-G _<4 _<4 44 _<4 ii.i _<� _<4 _<_5 3 - 0.038 4-43 _<4 _<4 4-7-8 _<4 0.753 68 <$$3 MW-12S 04/06/2016 5.8 7.42 10.2 566 <1 <1 12 <1 10.2 <50 <1 1.19 <5 3.3 0.058 <1 <1 <1 338 <1 0.749 24 <0.05 MW-12S 07/11/2016 4.9 9.82 12.8 392 <1 <1 13 <1 12.8 <50 <1 2.89 <5 2.9 0.045 <1 <1 1.9 385 <1 0.694 34 <0.05 M W n 2 S n 9 i n 7 i 2 n 1 c r-. 8 9-.i4 �'5 2-&4 _<4 _<4 -1-2 _<4 �'5 _<� _<4 _<_5 3_.� $4-6 _<4 _<4 _<4 2-7-G _<4 $-64 44 <$$55 MW-12S 11/04/2016 5.6 9.12 9.2 200 <1 <1 11 <1 9.2 <50 <1 1 1.14 131 <5 3.1 0.088 <1 <1 1.08 245 <1 0.661 131 19 <0.05 MWn 2S 1 2 i07 i201 6 &._3 9-.9-7 -1-3 324 _<4 <4 .8 _<4 -1-3 -<� <4 2.12 <5 2-.2 G-46 -<4 <4 2.22 32-7 _<4 0.622 2-2 <$$5 MW-12S 02/01/2017 6.5 8.53 23.8 361 <1 4-.7-9 11 <1 23.8 <50 <1 7.07 132 <5 0.36 5.7 1.61 1.65 9-46 3240 2.41 1.11 211 <0.05 Mini 1 2S 03 i28 i201 7 &.-2 &.-6-2 22.7 4-1-3 _<4 i. i i -1-3 _<4 22.7 _<� _<4 5_4 _<_3 &.-% 4.4 $6 4-. _5�g 3-.-7-3 6826 1.42 .i5 39-5 <0.05 Total Count of Valid Samples #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? I #NAME? #NAME? #NAME? #### I #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? I ##### #NAME? #### #### #NAME? #NAME? #NAME? Transition Zone BG 02 1 2 02 201 0 &._6 -1-3 i700 < 5 _< 5 <J6 )8 4-3-.-5 6-.-7 -14 2660 _< 5 4-9-& <2 BG- 02 n 4 i 2 n i 2 n 1 1 &._3 12.1 - 24& < 5 _<_5 & - - 6 <0.08 - - 3-54 - _<_5 _<_5 4-39 _<_5 1.4 < 2 BG-02 07/11/2011 6.3 9.2 - 298 <0.5 <5 64.8 B - - <50 <0.08 - - 32.6 B - 44-.2 - <5 559 _<_5 - 64.2 <0.2 BG-02 11/03/2011 6.3 5.63 - 180 <0.5 <5 67.7 - - <50 <0.08 - - 32.9 - 7.5 - <5 312 _<_5 - 36.7 <0.2 BG-02 04/04/2012 6.3 5.55 - <100 <0.5 <5 61.5 - - <50 <0.08 - - 32.6 - <5 - <5 152 _<_5 - 27 <0.2 BG-02 07/09/2012 6.3 9.47 - 262 <0.5 <5 53.4 - - <50 <0.08 - - 35.3 - 5.9 - <5 460 _<_5 - 54.9 <0.2 BG-02 11/05/2012 6.3 9.02 - 506 <0.5 <5 60.2 - - <50 <0.08 - - 33.3 - 6 - <5 759 _<_5 - 43.7 <0.2 BG-02 04/10/2013 6.3 8.5 - 226 <1 <1 66 - - <50 <1 - - 28 - <5 - <5 646 <1 - 111 0.18 BG-02 07/09/2013 6.4 8.08 - 412 <1 <1 69 - - <50 <1 - - 30 - <5 - <5 1130 <1 - 248 0.11 BG-02 11/13/2013 6.4 9.5 - 384 <1 <1 62 - - <50 <1 - - 29 - <5 - <5 841 <1 - 177 0.11 BG-02 04/01/2014 6.4 7.5 - 316 <1 <1 71 - - <50 <1 - - 28 - <5 - <5 943 <1 - 226 0.06 BG-02 07/18/2014 6.4 7.71 - 355 <1 <1 65 - - <50 <1 - - 30 - <5 - <5 1010 <1 - 244 0.08 BG-02 11/12/2014 6.3 5.33 - 233 <1 <1 61 - - <50 <1 - - 30 - <5 - <5 647 <1 - 180 <0.05 BG-02 04/13/2015 6.3 7.09 259 136 <1 <1 54 <1 259 <50 <1 57 <5 28 - <5 <1 <5 435 <1 11.8 150 0.06 BG-02 07/07/2015 6.5 8.51 225 193 <1 <1 54 <1 225 <50 <1 56.1 <5 30 - <5 <1 <5 467 <1 12 135 <0.05 BG-02 9/11/2015 6.4 6..88 </ </ 550 </ 2�2G0 </ 55n0 </ 550.�6 < 32 4.005 </ </ 244? </ <n0.0G5 �2 i 1 / 0 3 / 2 0 1 5 � 1T3 �2�20� i ZT6 M ! �8�2? z273 i1 � i1 � � i1 � 2-46 <<6 i1 � TJ 7 �J TJ �J i1 �S C1 �J 5TJ i1 �S i10.�6 1T6 i1�30 1�L �II BG-02 12/09/2015 6.4 5.24 257 M 1 < 100 <0.5 <0.5 60 <0.2 257 <50 <0.08 57.2 M 1 <5 29.7 <0.03 <0.5 B <0.5 <1 450 <0.1 12.3 200 <0.2 BG 02 01 08 i2016 ra--.4 i.98 23 80 _<4 _<4 §$ _<4 23 _6 _<4 _5� _<_ -3-3 <$$3 _<4 _<4 1.21 47-47 _<4 4-2-.6 4-% <$$5 BG-02 04/04/2016 6.4 2.71 303 65 <1 <1 65 <1 303 <50 <1 59.2 <5 30 <0.03 <5 <1 <5 585 <1 13.9 237 <0.05 BG-02 07/13/2016 6.2 3.4 302 58 <1 <1 59 <1 302 <50 <1 59.9 <5 30 <0.03 <5 <1 <5 484 <1 13.5 207 <0.05 BG 02 n 9 in7 i2 n 16 6-.-7 2-.9 2 7 _<4 _<4 -53 _<4 2-� _6 _<4 -5" _<_5 33 <$$3 _<4 <4 _<4 55;_3 _<4 4-3-4 4-34 <$$3 BG-02 11/02/2016 6.3 5.07 240 59 <1 <1 48 <1 240 <50 <1 51.3 <5 34 <0.03 <1 <1 <1 213 <1 10.8 131 <0.05 BG-02 01/30/2017 6.6 9.68 228 82 <1 <1 43 <1 228 <50 <1 50 132 <5 33 0.055 <1 <1 <1 184 <1 10.6 104 <0.05 MW-12D 06/24/2015 6.2 4.02 53 184 4-.,6,3 <1 26 <1 53 <50 <1 12.6 4 --- <1 4-.37- <1 326 <1 3.44 6-&3 <0.05 MW-12D 09/ 10/2015 6.2 3.88 57 220 <1 <1 20 <1 57 <50 <1 11.7 <$ 4.1 --- 1.1 <1 <1 277 <1 3.04 218 <0.05 M W 2 D 1 2 i 0 2 i 2 01 5 &.-G ii.3 §4 3G6 1.44 _<4 24 _<4 54 _6 _<4 4-1-.3 4. 5 &. 5 3-43 _<4 _<4 SG4 _<4 3-.2-2 4-9-3 <$$r3 MW-12D 12/04/2015 6.1 8.08 53.2 150 <0.5 <0.5 20 <0.2 53.2 <50 0.099 11.5 <5 3.7 0.64 M1 4.6 0.51 <1 280 <0.1 3.24 160 <0.2 M � n� v-i 2 D 01 i 0 7 i 2 01 6 6-4- 9.26 5-3-.-5 6-7�8 <4 _<4 2-2 _<4 5-3-.-5 _<4 ii.7 _< 3 4-.5 0.52 -M ! z2.-9-g _<4 4-.-54 9-&8 _<4 3-.i8 4-34 < 5 MW-12D 04/05/2016 5.9 9.9 55.1 370 <1 <1 21 <1 55.1 <50 <1 11.4 <5 4.5 0.6 1.64 <1 <1 385 <1 3.27 100 <0.05 MW-12D 07/11/2016 5.7 9.35 56.3 155 <1 <1 17 <1 56.3 <50 <1 11.5 <5 4.4 0.73 1.19 <1 <1 223 <1 3.16 81 <0.05 M � n� v-i 2 D 0 9 i 0 7 i 2 n 1 G &.-3 9_._2 5-3-.-5 2-57 _<4 _<4 -1-6 _<4 5-3-.-5 < J6 < g _<_5 48 �5 2_.- _<4 _<4 4 &9 _<4 3-.0-2 64 <0.05 MW-12D 11/04/2016 6.3 9.09 55 272 <1 <1 16 <1 55 <50 <1 10.6 131 <5 4 0.64 1.92 <1 <1 405 <1 2.97 131 56 <0.05 C:\Users\bjstrickland\AppData\Local\Temp\Mayo_BG GW Analytical Results March 2017_597496\Mayo_BG GW Analytical Results March 2017.xlsm Page 1 of 6 TABLE 1 UPDATED BACKGROUND GROUNDWATER ANALYTICAL RESULTS THROUGH MARCH 2O17 MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Methane Molybdenum Nickel Nitrate + Nitrite Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Total Dissolved Solids Total Organic Carbon Vanadium Zinc Radium-226 Radium-228 Uranium-233 Uranium-234 Uranium-236 Uranium-238 Reporting Units ug/L ug/L ug/L mg-N/L mg/L ug/L mg/L ug/L mg/L mg/L ug/L mg/L mg/L ug/L ug/L pCi/L pCi/L ug/mL ug/mL ug/mL ug/mL 15A NCAC 02L Standard NE NE 100 NE NE 20 NE NE 250 NE 0.2* 500 NE 0.3* 1000 NE NE NE NE NE NE Sample ID Sample Collection Date Analytical Results Saprolite MWn 2S 06 i1 8 i2n 1 5 < 4-.43 1 4-.&6 < 6-.-7�9 2-7 -1-.-9 1 < G. 2 51G 0.403 6-7 - MW-12S 09/10/2015 12 <1 2.98 0.7 1.53 <1 5.43 23 1.4 <0.1 <0.2 55 0.633 <0.3 64 - - - - - MW-12S 12/02/2015 <10 < 1 5.41 0.638 1.4 < 1 5.08 21 1.3 <0.1 <0.2 26 0.519 0.313 79 - - - - - - MWn 2S n 1 in7 i2n 1 6 <� < -1-.-6 0.599 4-.-58 < 4-.-7�6 -1-8 -1-.4 <$1 < (). 2 -3-5 -1-.-6 4-57 - MW-12S 04/06/2016 <10 <1 <1 0.798 1.22 <1 5.49 17 1.2 <0.1 <0.2 29 0.522 0.408 43 0.537 <3 <0.00005 <0.00005 <0.00005 0.000217 MW-12S 07/11/2016 <10 < 1 1.16 0.566 1.89 < 1 4.34 21 1.6 <0.1 <0.2 43 2 0.974 227 < 1 < 1 <0.00005 <0.00005 <0.00005 <0.0002 r;Wn 2S nn in7 i2n 1 6 <� <4 -<4 0.756 4-.36 -<4 4-.-7-8 -1-6 4-4- <$1 <$2 52 0.763 0.7i 4-4G -' 6 -<4 <$ BAA2 MW-12S 11/04/2016 <10 <1 1.19 0.739 1.35 <1 4.85 132 16 0.89 <0.1 <0.2 52 0.53 0.593 73 <1 <1 <0.00005 <0.00005 <0.00005 <0.0002 MWn 2S 1 2 in7 i2n 1 6 < 1�rvTrS. �3 1.22 0.419 2.3-3 < 446 -14 2-.3 <$1 <$2 -57 -3-.-6 0.698 64-B2 < &.-54 MW-12S 02/01/2017 36 N2 3.15 3.03 <0.01 3.78 <1 0.566 132 25 1.6 <0.1 <0.2 135 85 -14 9 90 <1 <1 <0.00005 <0.00005 <0.00005 0.000112 j MW 12S 03/28/2017 2-73 4-.9-7 4-.7-9 <1 3-.2-9 < z. 2-7 &.-9-5 < (). 1 <0.2 --,;4 8.1 B3 2-.8 24 0.383 < Total Count of Valid Samples #NAME? #NAME? #### #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? I #### #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? Transition Zone BG-02 12 in2 i2n 1 n - - -<-5 8-.5 - < .1 349 - - 3$9 - - - - - - BG-02 07/11/2011 - - 9.4 B - - <$ - - 7.2 B - <0.1 367 B - - <10 - - - - - - BG-02 11/03/2011 - - 5.2 - - < - - 6.9 - <0.1 341 - - <10 - - - - - - BG-02 04/04/2012 - - <5 - - <$ - - 7.5 - <0.1 412 - - <10 - - - - - - BG-02 07/09/2012 - - <5 - - < - - 7.7 - <0.1 382 - - <10 - - - - - - BG-02 11/05/2012 - - <5 - - < - - 8.3 - <0.1 389 - - <10 - - - - - - BG-02 04/10/2013 - - <5 - - <1 - - 5.4 - <0.2 430 - - <5 - - - - - - BG-02 07/09/2013 - - <5 - - <1 - - 5.2 - <0.2 430 - - <5 - - - - - - BG-02 11/13/2013 - - <5 - - <1 - - 5.2 - <0.2 360 - - <5 - - - - - - BG-02 04/01/2014 - - <5 - - <1 - - 4.8 - <0.2 450 - - 8 - - - - - - BG-02 07/18/2014 - - <5 - - <1 - - 4.9 - <0.2 400 - - 5 - - - - - - BG-02 11/12/2014 - - <5 - - <1 - - 5 - <0.2 370 - - 8 - - - - - - BG-02 04/13/2015 - <1 <5 - 3.27 <1 49.7 - 4.8 - <0.2 380 - - 11 - - - - - - BG-02 07/07/2015 - <1 <5 - 3.61 <1 48.2 - 5.1 - <0.2 370 - 5.88 -1-5 - - - - - - BG-02 9/11/2015 400 <1 2.87 0.019 3.56 </i1 44.�6 29p1 55.4C <0.1 <00.2� 3300 1.4 3 - - - - - - �2 1 1 / n 3 / 2 n i C � <� T. QT �S TAT 3TQ �5 �L TJII �4�? �3 -<-J - BG-02 12/09/2015 660 0.74 0.82 <0.02 <5 <0.5 51.3 390 5.1 <0.1 <0.1 314 1.1 5.8 12 - - - - - - BG 02 n 1 i n 8 i 2 n 1 c 474 <4 <4 <$$1 -3--.4 < '�$. 6 3' 9 r-. 5 <$1 <$2 37-9 4-2 -<-5- - - - - - BG-02 04/04/2016 1130 < 1 <5 --- 3.34 < 1 56 391 4.9 <0.1 <0.2 360 1.8 5 <5 4.07 <3 <0.00005 <0.00005 <0.00005 0.00102 BG-02 07/13/2016 2260 <1 <5 <0.01 3.23 <1 53.3 374 4.9 <0.1 <0.2 370 1.6 4.79 <5 4.4 3.12 <0.00005 <0.00005 <0.00005 0.000918 BG 02 nn in7 i2n 1 c �70 < < 1 3-.31 < 5-3-.-5 37-& -5-.6 < (). 1 < (). 2 37-9 -1-.-6 5-.34 <5 7- < n nnn7n 1 BG-02 11/02/2016 1120 N2 <1 <1 0.02 3.48 <1 45.3 320 5.6 <0.1 <0.2 330 H 1 1.4 3.63 <5 2.36 <1 <0.00005 <0.00005 <0.00005 0.000855 BG-02 01/30/2017 801 N2 <1 <1 <0.01 3.48 <1 44 132 287 5.6 <0.1 <0.2 320 1.4 4.14 132 <5 <1 <1 <0.00005 <0.00005 <0.00005 0.000926 MW-12D 06/24/2015 <10 4-.-7�5 2.5 0.08 1.6 <1 8.98 95 0.96 <0.1 <0.2 120 0.396 0.719 <5 - - - - - - MW-12D 09/10/2015 <10 <1 1.35 0.664 1.41 <1 9.03 85 0.99 <0.1 <0.2 100 1.7 0.637 9 - - - - - - M� n� v-z 2 D 1 2 i n 2 2 n 1 5 <� < 3-.$1- 0.132 4-.4E3 < 9-4-8 9$ I <$1 <$2 9-7 0.266 4$1- -1-6 - MW-12D 12/04/2015 <10 0.8 3.7 0.15 <5 <0.5 9.56 85 <1 <0.1 <0.1 122 <1 <1 <10 - - - - - - M � n� v-z 2 D n 1 i n 7 i 2 n 1 6 <� < 2-.-2-3 $ i 39 4-.39 < 8-.-7�6 8-7 4-4- <$1 <$2 8- 0.184 4-.,6,5 -5 - MW-12D 04/05/2016 <10 <1 1.49 0.146 1.42 <1 9.35 92 1.1 <0.1 <0.2 120 0.314 1.06 <5 6 <3 <0.00005 <0.00005 <0.00005 0.000233 MW-12D 07/11/2016 17.9 <1 1.23 0.176 1.36 <1 9.26 88 1.1 <0.1 <0.2 98 0.276 0.898 6 2.62 <1 <0.00005 <0.00005 <0.00005 0.0000919 j v-z zD n n in7 i2 n 1 6 44.4 < zz. 92 &.8 4-.34 < 9-$3 83 -1-4 <$1 <$2 lee $289 4-4-3 3r 2-4-9 < MW-12D 11/04/2016 28.5 N2 <1 1.37 0.166 1.37 <1 8.39 132 85 1.1 <0.1 <0.2 110 0.171 1.25 <5 0.659 < 1 <0.00005 <0.00005 -F- <0.00005 0.000168 j C:\Users\bjstrickland\AppData\Local\Temp\Mayo_BG GW Analytical Results March 2017_597496\Mayo_BG GW Analytical Results March 2017.xlsm Page 2 of 6 TABLE 1 UPDATED BACKGROUND GROUNDWATER ANALYTICAL RESULTS THROUGH MARCH 2O17 MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter pH Turbidity Alkalinity Aluminum Antimony Arsenic Barium Beryllium Bi- carbonate Alkalinity Boron Cadmium Calcium Carbonate Alkalinity Chloride Chromium (VI) Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Reporting Units S.U. NTUs 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 mg/L ug/L ug/L 15A NCAC 02L Standard 6.5-8.5 NE NE NE 1* 10 700 4* NE 700 2 NE NE 250 10 10 1* 1000 300 15 NE 50 1 Sample ID Sample Collection Date Field Parameters Analytical Results MW-12D 02/01/2017 6.1 8.42 54.9 115 <1 <1 14 <1 54.9 <50 <1 10.3 132 <5 3.8 0.69 1.39 <1 <1 243 <1 2.8 96 <0.05 M � n� v-i 2 D 0 3 i 2 8 i 2 n 1 ram. g 5-.-7 -54-3. 4-4G _<4 _<4 -1-5 _<4 -54-3. _<4 i2A _<_5 . 3 4-.-2-5 _<4 1.24 2-4-2- _<4 3-.-2 4-5 <0.05 Total Count of Valid Samples #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #### #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? 1 ##### #NAME? #### 1 #### #NAME? I #NAME? I #NAME? Bedrock BG ()1 1 0 i31 i2008 5-.-7 - - - 0-4-3 �4 3$40 - - .6 4-4- - - -1-7 - 36-.9 - 3$4 65700 33-4- - 2270 <$1 BG G 7-.-G - - - 2-.5 _<4 4- 5 - - <2 0 0 _<4 - - -1-& - 4-7 - 319-.2 2100 -i g - 3_� <$2 BG G 1 10/21 2009 -5-.3 4-.2 -<-I 4_7�5 <200 _<4 -15 45-.-7 49-7 4610 2-.3 4-&E3 < G. 2 BG G 1 04i22 i201 0 -5-.6 - - - _<� _<� 12G Ei - - -14 - 8-.-2 - -1-8 2000 -1-2 - 39 $4-E3 BG G 1 1 2 i 0 6 i 2 01 n r-. g -1-0 7-7-G <0.5 _< 5 4-Gr3 -1-5 4-5-.- 34-4 i080 _<_5 2-6. 3 < G. 2 BG G 1 0 n i 2 0 i 2 01 1 r-. J 22.7 4 56 0.5 _< 5 9-9-.4 0-4-5 14.1 6-4- ii.7 7-G2 _<_3 2-6. f3 < 0. 2 BG G 1 07 i1 1 i201 1 -5-.-5 24.2 - 584 <G.5 _<_5 101 B 0-.i3 - - 13.8 B - 4-9-4- - _<_5 1040 _<_5 - 2-9-.6 < 0.2 BG-01 11/03/2011 5.5 3.84 - 216 <0.5 _<_5 95.4 - - <50 0.2 - - 13.1 - 7.9 - <5 261 _<_5 - 8.9 < 0. 2 BG-01 04/04/2012 5.6 9.52 - 191 <0.5 _<_5 93 - - <50 0.12 - - 14.3 - 6.7 - <5 388 _<_5 - 11.6 < G. 2 BG-01 07/09/2012 5.3 9.32 - 478 <0.5 _<_5 101 - - <50 0.13 - - 14.6 - 2-G - <5 640 _<_5 - 21.6 < G. 2 BG-01 11/05/2012 5.4 9.45 - 465 <0.5 _<_5 101 - - <50 0.089 - - 13.4 - <5 - <5 526 _<_5 - 55.6 < G. 2 BG-01 04/10/2013 5.2 9.05 - 202 <1 <1 97 - - <50 <1 - - 13 - 7 - <5 323 <1 - 15 <0.05 BG-01 07/09/2013 5.4 8.95 - 383 <1 <1 97 - - <50 <1 - - 13 - <5 - <5 488 <1 - 48 <0.05 BG-01 11/13/2013 5.5 8.2 - 339 <1 <1 95 - - <50 <1 - - 12 - <5 - <5 412 <1 - 27 <0.05 BG-01 04/01/2014 5.4 8.2 - 202 <1 <1 90 - - <50 <1 - - 12 - <5 - <5 290 <1 - 14 <0.05 BG-01 07/18/2014 5.5 6.68 - 245 <1 <1 93 - - <50 <1 - - 12 - <5 - <5 325 <1 - 15 <0.05 BG-01 11/12/2014 5.5 9.96 - 332 <1 <1 95 - - <50 <1 - - 12 - <5 - <5 466 <1 - 25 <0.05 BG-01 04/13/2015 5.5 8.9 49.8 392 <1 <1 90 <1 49.8 <50 <1 12.5 <5 11 - <5 <1 <5 409 <1 3.35 35 <0.05 BG-01 07/07/2015 5.6 10 48.3 418 <1 <1 97 <1 48.3 <50 <1 13.1 <5 11 - <5 <1 <5 557 <1 3.63 23 <0.05 BG-01 09/10/2015 5.3 7.83 54 276 <1 <1 91 <1 54 <50 <1 12.8 11 - <1 <1 <1 300 <1 3.41 26 <0.05 BG-01 11/03/2015 6.9 1.79 52.1 33 <1 <1 90 <1 52.1 <50 <1 12.8 132 <5 12 - <5 <1 <5 45 <1 3.28 7 <0.05 BG-01 12/05/2015 5.5 9.5 52.8 250 <0.5 <0.5 94 <0.2 52.8 <50 0.13 12.6 <5 10.1 0.31 1 <0.5 <1 350 0.13 3.28 18 < G. 2 BG-01 01/08/2016 5.1 5.78 51.1 227 <1 <1 87 <1 51.1 <50 <1 12.6 <5 12 0.2 <1 <1 <1 272 <1 3.36 11 <0.05 BG-01 04/04/2016 5.5 4.3 53 177 <1 <1 88 <1 53 <50 <1 12.1 <5 11 0.19 M1 <5 <1 <5 190 <1 3.2 12 <0.05 BG-01 07/13/2016 5.0 3.84 53.1 66 <1 <1 86 <1 53.1 <50 <1 12.3 <5 12 0.23 <5 <1 <5 89 <1 3.09 7 <0.05 BG-01 09/08/2016 5.5 9.49 52.9 275 <1 <1 90 <1 52.9 <50 <1 12 <5 11 0.3 <1 <1 <1 336 <1 3.21 13 <0.05 BG-01 11/02/2016 5.5 2.98 52.8 48 <1 <1 90 <1 52.8 <50 <1 12.4 <5 11 0.23 <1 <1 <1 50 <1 3.18 8 <0.05 BG-01 02/01/2017 5.6 1.37 52.8 231 <1 <1 87 <1 52.8 <50 <1 12.2 <5 9.5 0.29 <1 <1 1.22 200 <1 3.19 13 <0.05 BG-01 03/28/2017 5.4 0.47 53 218 <1 <1 87 <1 53 <50 <1 12.9 <5 11 0.25 <1 <1 <1 137 <1 3.28 10 <0.05 M W 1 0 Q R 0 3 i 1 7 i 2 01 5 6-.-2 3-5-.-5 4-1-G 64-1- _<4 _<4 2-7 _<4 4-1-G _<� _<4 36-.& < Q z- -1-.-3 _<4 _<4 8-&3 _<4 4-5-.-5 8-94 5 MW-10BR 09/11/2015 6.1 1.06 110 17 <1 <1 5 <1 110 <50 <1 29.1 <$ 19 - <1 <1 <1 37 <1 13.7 135 <0.05 MW-10BR 12/03/2015 6.1 1.5 103 34 <1 <1 <5 <1 103 <50 <1 30 <5 20 <0.03 <1 <1 <1 193 <1 12.9 84 <0.05 MW-10BR 01/07/2016 6.1 1.64 103 62 <1 <1 <5 <1 103 <50 <1 28.8 <5 21 <0.03 <1 <1 <1 33 <1 13.1 103 <0.05 MW-10BR 04/05/2016 6.2 0.98 103 15 <1 <1 <5 <1 103 <50 <1 28.5 <5 21 <0.03 <1 <1 <1 29 <1 12.9 71 <0.05 MW-10BR 07/13/2016 6.3 4.12 112 18 <1 <1 6 <1 112 <50 <1 30.9 <5 20 132 0.041 <1 <1 <1 24 <1 13.7 74 <0.05 MW-10BR 09/07/2016 6.2 2.25 103 21 <1 <1 <5 <1 103 <50 <1 28.5 <5 22 0.07 <1 <1 <1 35 <1 12.7 72 <0.05 MW-10BR 11/08/2016 6.0 2.15 106 11 <1 <1 <5 <1 106 <50 <1 27.7 <5 21 0.4 M1 <1 <1 <1 18 <1 12.6 61 <0.05 MW-10BR 02/02/2017 6.3 1.01 107 49 <1 <1 <5 <1 107 <50 <1 69.7 <5 20 0.07 <1 <1 <1 78 <1 13.5 72 <0.05 `W 11 B R 0 6 i2 5 i2 015 4-&G 8_0 �' 2 _<4 44 _<4 4-&G -<50 _<4 49-. 6 _<� -1-6 - 3-.-7-3 _<4 _<4 44-5 _<4 i i. i 6-7 <$$5 M W1 1 B R 0 9 i 1 1 i 2 91 s 9-.-2 7-.8-7 4-0-G 4-9-5 1.74 4_46 -3i _<4 88 _<4 30-.6 -1-5 -1-5 4-5-.-6 _<4 1.44 4-53 _<4 4-. % 44 < 0. 0 5 MW 1 i-13R 1 2 /03 /201 5 9-.2 8-.-7 7-0-.7 2G7 4-.57 4-.Gr3 22 _<4 &9-.6 _<4 z�.3 _<_5 -15 _1_� 24.1 _<4 4-.9-9 304 _<4 &.45 2-9 5 T n � nW 11 B R 01/97/2 n 1 c 9-.8 -. 04 6.4--& �G �9� 4 $2 24 -<4 3 .4 � <� �7 z�. 3 � 1;!.;! -<4 -<4 � <$$F; M � n�rii-QB R 0 4 i 0 5 i 2 n 1 c =, ---- � &A-3 < �5 4 4-2< � -<4 �5 4� -1-5 -1-"2 -<4 3-331,-18-<42-3S 2-5 < 0.0 53 C:\Users\bjstrickland\AppData\Local\Temp\Mayo_BG GW Analytical Results March 2017_597496\Mayo_BG GW Analytical Results March 2017.xlsm Page 3 of 6 TABLE 1 UPDATED BACKGROUND GROUNDWATER ANALYTICAL RESULTS THROUGH MARCH 2O17 MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Methane Molybdenum Nickel Nitrate + Nitrite Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Total Dissolved Solids Total Organic Carbon Vanadium Zinc Radium-226 Radium-228 Uranium-233 Uranium-234 Uranium-236 Uranium-238 Reporting Units ug/L ug/L ug/L mg-N/L mg/L ug/L mg/L ug/L mg/L mg/L ug/L mg/L mg/L ug/L ug/L pCi/L pCi/L ug/mL ug/mL ug/mL ug/mL 15A NCAC 02L Standard NE NE 100 NE NE 20 NE NE 250 NE 0.2* 500 NE 0.3* 1000 NE NE NE NE NE NE Sample ID Sample Collection Date Analytical Results MW-12D 02/01/2017 71 N2 <1 1.62 0.19 1.22 <1 8.18 132 83 1 <0.1 <0.2 135 110 0.366 0.874 <5 0.835 <1 <0.00005 <0.00005 <0.00005 0.000146 j M�n�v-i2D n3i28i2n17 - -, - -, - - - - � � z� �g �1 � �i6 3-5 � 1 �� n 1n2 Q3 v�-�-vim 0.805 <� 4� < 4 <0.00005 <0.00005 <0.00005 0.000123-1 Total Count of Valid Samples #NAME? #NAME? I #### I #NAME? I #NAME? I #NAME? I #NAME? I #NAME? I #NAME? #NAME? #NAME? I #NAME? I #NAME? #NAME? 1####1 #NAME? I #NAME? I #NAME? I #NAME? I #NAME? I #NAME? Bedrock BG1 1 n i31 i2nno - - 2-3-.- - - 2--.4 4$&9 - - 2-2-9 - - - - - - BG1 - - 4-9 - - -<-5 -<4 47 - - 69-.3 - - - - - - BG1 1 n i 21 i 2 n n n - - 9-.3 - - << - - -<-5 - -<4 4-46 - - 4-3-3 - - - - - - BG1 n n i 2 2 i 2 n 1 n - - -<� - - -<� - - << - -<� -1-7 - - -<� - - - - - - BG1 1 2 in 6 i2 n 1 n - - 4-4-.9 -<-5 - <$1 4-2-6 - - 2� - - - - - - BG1 n n i2 n i2 n 1 1 - - 2-7 -<-5 - <0.1 4-35 - - 4-5--.6 - - - - - - BG-O 1 n :7 i 1 1 i2 n 1 1 - - 40.4-B -<-5 <0.1 ii7 B - - 4-4-.6 - - - - - - BG-01 11/03/2011 - - 6.2 - - < - - <5 - <0.1 106 - - <10 - - - - - - BG-01 04/04/2012 - - <5 - - < - - <5 - <0.1 107 - - <10 - - - - - - BG-01 07/09/2012 - - 9.4 - - < - - 2 - <0.1 128 - - <10 - - - - - - BG-01 11/05/2012 - - <5 - - <$ - - <2 - <0.1 123 - - 11.6 - - - - - - BG-01 04/10/2013 - - <5 - - <1 - - 0.44 - <0.2 130 - - 7 - - - - - - BG-01 07/09/2013 - - <5 - - <1 - - 0.52 - <0.2 130 - - 12 - - - - - - BG-01 11/13/2013 - - <5 - - <1 - - 0.51 - <0.2 130 - - 30 - - - - - - BG-01 04/01/2014 - - <5 - - <1 - - 0.4 - <0.2 140 - - 29 - - - - - - BG-01 07/18/2014 - - <5 - - <1 - - 0.46 - <0.2 140 - - 16 - - - - - - BG-01 11/12/2014 - - <5 - - <1 - - 0.51 - <0.2 120 - - 34 - - - - - - BG-01 04/13/2015 - <1 <5 - 1.4 <1 12.4 - 0.32 - <0.2 130 - - 29 - - - - - - BG-01 07/07/2015 - <1 <5 - 1.5 <1 11.8 - 0.32 - <0.2 130 - 4.94 50 - - - - - - BG-01 09/10/2015 16 <1 1.78 0.645 1.38 <1 11.6 172 0.37 <0.1 <0.2 120 0.913 3.93 17 - - - - - - BG-01 11/03/2015 - <1 <5 - 1.35 <1 11.8 132 179 0.36 - <0.2 110 - 3.4 <5 - - - - - - BG-01 12/05/2015 <10 <0.5 1.9 0.66 <5 <0.5 12.2 180 <1 <0.1 <0.1 118 1 4.2 14 - - - - - - BG-01 01/08/2016 <10 <1 1.24 0.643 1.39 <1 11.9 166 0.24 <0.1 <0.2 130 0.558 3.94 <5 - - - - - - BG-01 04/04/2016 <10 <1 <5 - 1.36 <1 11.5 167 0.25 <0.1 <0.2 130 0.738 3.94 7 2.25 <3 <0.00005 <0.00005 <0.00005 <0.0002 BG-01 07/13/2016 <10 <1 <5 0.827 1.28 <1 11.9 177 0.23 <0.1 <0.2 140 0.723 3.58 <5 1.29 <1 <0.00005 <0.00005 <0.00005 <0.0002 BG-01 09/08/2016 <10 <1 1.46 0.828 1.32 <1 11.7 172 0.32 <0.1 <0.2 130 0.667 4.69 26 3.24 0.636 <0.00005 <0.00005 <0.00005 <0.0002 BG-01 11/02/2016 <10 N2 <1 1.82 0.811 1.31 <1 11.4 183 0.26 <0.1 <0.2 110 H 1 0.565 3.82 <5 2.78 3.46 <0.00005 <0.00005 <0.00005 <0.0002 BG-01 02/01/2017 <10 N2 <1 1.6 0.809 1.33 <1 11.2 174 0.26 <0.1 <0.2 140 0.703 4.34 135 <5 <1 <1 <0.00005 <0.00005 <0.00005 <0.0002 BG-01 03/28/2017 <10 <1 1.41 0.834 1.38 <1 12.5 173 0.25 <0.1 <0.2 120 0.64 133 4 <5 2.51 0.352 <0.00005 <0.00005 <0.00005 <0.0002 Mini 1 nQR 03i17i201 5 -<� z 37 3-.$9 <G.G1 -<4 3-7�-.9 22 -9 &3 -<� <$2 3-3G -2 4-. 6-6 -9 - MW-10BR 09/11/2015 <10 1 1.83 <0.01 4.28 <1 39.7 198 81 <0.2 <0.2 310 2.1 1.73 <5 - - - - - - MW-10BR 12/03/2015 <10 CL <1 2.02 <0.01 3.95 <1 37.7 198 83 <0.5 <0.2 320 2 1.5 <5 - - - - - - MW-10BR 01/07/2016 <10 <1 1.76 0.017 4.15 <1 39.5 195 90 <0.1 <0.2 300 1.8 1.68 <5 - - - - - - MW-10BR 04/05/2016 <10 <1 1.84 <0.01 4.03 <1 38.8 195 88 <0.1 <0.2 300 1.9 1.7 <5 0.989 1.77 <0.00005 <0.00005 <0.00005 0.000188 j MW-10BR 07/13/2016 <10 <1 1.82 0.026 4.62 <1 41.7 198 84 <0.1 <0.2 310 2 2.01 19 0.9 0.518 <0.00005 <0.00005 <0.00005 0.0000755 j MW-10BR 09/07/2016 <10 <1 1.79 0.029 3.94 <1 38.2 208 90 <0.1 <0.2 310 2 1.91 <5 1.64 <1 <0.00005 <0.00005 <0.00005 <0.0002 MW-10BR 11/08/2016 <10 N2 <1 1.78 <0.01 3.96 <1 37.3 202 83 <0.1 <0.2 300 1.9 2.04 8 0.266 1.66 <0.00005 <0.00005 <0.00005 <0.0002 MW-10BR 02/02/2017 <10 N2 <1 1.91 <0.01 5.52 <1 27.1 203 86 <0.1 <0.2 310 1.9 1.99 <5 0.69 <1 <0.00005 <0.00005 <0.00005 0.0000927 j MW 1 1- B R n 6 i 2 5 i 2 n 1 5 fir-.-4-1- -<4 <$$1 &.43 -<4 4-4-.3 2$9 -1-4 <$1 0. 3 2 3 2-5G 4-4- 2-. 6-9 -<-5- - - - - - M W 11 B R n n i 1 1 2 n 1 5 2-.-7�E3 -<4 0.165 7-.2-9 4-4-6 -. 6 34-8 -1-6 <$1 <$2 4-8-9 4-.-2 9-4-5 -<-5- - - - - - M W 1 i- QB R 1 2 i n 3 i 2 n 1 5 i i� 7-.6-9 2-2 0.249 12.1 4$4 2$. 7 225G -1-5 <$1 <$2 4 G 1 12.1 4-2 - - - - - - MW 1 i-BR n 1 /n7 f2n 1 G 7.72 -<4 0.272 7-.95 -<4 4-6-.-6 2-53 -1-6 1 <0.2 4-3-G 0.835 12.7 -<-3 - MW 11Brol 04 in5i2 &.-&5 1 -<4 0-3$8 -7-.� -<4 4-6-.-5 2-% -14 <$1 <$2 4-40 0.952 �r3 -<-5 &.-3-5 9.999351 C:\Users\bjstrickland\AppData\Local\Temp\Mayo_BG GW Analytical Results March 2017_597496\Mayo_BG GW Analytical Results March 2017.xlsm Page 4 of 6 TABLE 1 UPDATED BACKGROUND GROUNDWATER ANALYTICAL RESULTS THROUGH MARCH 2O17 MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter pH Turbidity Alkalinity Aluminum Antimony Arsenic Barium Beryllium Bi- carbonate Alkalinity Boron Cadmium Calcium Carbonate Alkalinity Chloride Chromium (VI) Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Reporting Units S.U. NTUs 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 mg/L ug/L ug/L 15A NCAC 02L Standard 6.5-8.5 NE NE NE 1* 10 700 4* NE 700 2 NE NE 250 10 10 1* 1000 300 15 NE 50 1 Sample ID Sample Collection Date Field Parameters Analytical Results MW 11 B R 0 7 i 1 3 i 2 01 6 44�-.6 q-.54 6-9-4 4� 4-.48 _<4 22-7 _<4 ram. 8 _<4 z24�-. 8 6-3--.6 15 132- 4i 35 4-4-. 5 _<4 4-4g 4-04 _<4 4-.-7 -1-5 5 MW 11 B R 0 9 i 0 6 i 2 01 6 --, --, ---- �8 y7.47 �5 �0 �6 � z� � �F? � � �6 44-g � 19.4 M 6 � r3 � z-.- 47 ? � �g � 5 i �n M \ nW 1 1 B T 1 / 0 8 / 2 0 1 6 11/08/2016 i � � �g p �� '�Tr G^� p &2 8 ��p ZZU i �� T. 7 7 /i �S �i 3S /i �S ^�G ^� Z�2 /C/'� �JII /i �S i p i 1�S C �J 36 i � TJ i� ^Tv 1 2 4 i � TJ /i �S i � TT C/'� _5II /i �S i �� T4Q G II /� /�� <0.05 �J nar W 11 BR 02 i02 i201 :7 1Ti 6.68 &ig 24G 451 _<4 z24 _<4 _<5 _<4 �8 5-9-.-7 -1-5 ii.i bra g a7 _<4 4-.-2 -5 <0.05 M W-13BR 06/23/2015 7.2 2.22 210 37 <1 <1 40 <1 210 <50 <1 75.2 46 - <1 1.19 <1 1130 <1 13.1 474 <0.05 M W-13BR 09/08/2015 6.9 7.55 230 143 131 <1 <1 51 <1 230 <50 <1 73 43 - <1 <1 <1 2400 <1 12.9 630 <0.05 MW-13BR 12/02/2015 7.0 6.5 210 171 <1 <1 45 <1 210 <50 <1 72.7 41 <0.03 4-6-. <1 1.2 2490 <1 13.5 548 <0.05 MW-13BR 01/07/2016 7.3 7.79 223 M 1 230 <1 <1 42 <1 223 <50 <1 73.3 <5 45 <0.03 7.65 <1 <1 2550 <1 12.9 519 <0.05 MW-13BR 04/05/2016 7.1 9.05 217 97 <1 <1 35 <1 217 <50 <1 70.8 <5 43 <0.03 <1 1.01 <1 1750 <1 12.9 481 <0.05 MW-13BR 07/11/2016 7.0 8.8 211 407 <1 <1 29 <1 211 <50 <1 70.2 <5 40 <0.03 4.51 z 2 1.95 1330 <1 13 348 <0.05 MW-13BR 09/06/2016 7.4 9.67 216 134 <1 <1 38 <1 216 <50 <1 69.7 <5 38 <0.03 2.02 1.17 <1 2520 <1 12.7 432 <0.05 MW-13BR 11/08/2016 6.9 9.9 221 102 <1 <1 35 <1 221 <50 <1 67 <5 37 0.18 3.58 2-.0-2 <1 2430 <1 12.3 471 <0.05 MW-13BR 02/02/2017 6.9 9.13 213 91 <1 <1 31 <1 213 <50 <1 65 <5 34 0.26 2.7 <1 2920 <1 12 421 <0.05 rM W 14BR 0 3 i 1 2 i 2 01 5 6-.-7 _3_5 % 58-9 _<4 _<4 _3$ _<4 % _<� _<4 445 9-.3 - _<4 1.41 4-5 947 _<4 z 46 -544 <0.05 MW-14BR 09/09/2015 6.9 3.36 160 61 <1 -1-.-8 42 <1 160 &5 <1 20.2 11 - <1 1.09 <1 2730 <1 3.07 648 <0.05 MW-14BR 12/02/2015 6.7 2.77 </ </ 2�2 </ </550 </ 1i3�.4 <0.03 </ </ 3n9p6 </ 2.29 3n044 <0.05 M W 0 1 / 0 7 / 2 0 1 6 �7 z-45 n1^00p 7TQ i77 � i1 � i1 � 1-7 i1 � n1^00p 7TQ _ 3� i1 � TJ /1C$ _< 3 i1�1 TJ �3 i1 � i1 � i<�1 T 2 1 7II i1 �S z 46 TT7 <0.05 MW-14BR 04/05/2016 6.7 2.45 104 225 <1 <1 19 <1 104 <50 <1 13 <5 13 <0.03 <1 <1 1.87 89 <1 2.36 196 <0.05 MW-14BR 07/11/2016 6.7 5588 <1 <1 22 <1 </550 <1 14.4 </55 13 <0.03 <1 <1 377 <1 2.51 247 <0.05 ,M`W 14BR 09 /07 /201 6 �7 C1.�344 �g i130 � TJ � � z� � i130 � <J� � 15.3 4 �J -14 <0.03 � � i1.58 4-43 -5II _<4 z. 32-2 <0.05 MW-14BR 11/08/2016 7.0 3.74 136 129 <1 <1 28 <1 136 <50 <1 16.2 <5 13 <0.025 <1 1.14 1.97 172 <1 2.64 385 <0.05 MW-14BR 02/02/2017 6.7 1.14 121 63 <1 <1 19 <1 121 <50 <1 28.9 <5 13 0.067 <1 <1 1.36 37 <1 13.1 96 <0.05 Total Count of Valid Samples #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? #### #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? ##### #NAME? #### #### #NAME? #NAME? #NAME? Prepared by: JHG / RKD Checked by: RHJ Notes: -54 - Indicates value omitted from dataset. - Indicates parameter not measured or analyzed. - Indicates data removed /identified as an outlier - Indicates data removed due to autocorrelation < - concentration not detected at or above the adjusted reporting limit. pCi/L - picocuries per liter mg - N/L - Milligrams nitrogen per liter S.U. - Standard Unit mg/L - Milligrams per liter ug/L - Micrograms per liter NE - Not established ug/mL - micrograms per milliliter NTU - Nephelometric turbidity unit * - 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. Analyte concentration in sample could be due to blank contamination. 131 - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample was greater than 10X the concentration in the method blank. Analyte concentration in sample is not affected by blank contamination. 132 - 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. 133 - Target analyte was detected in Continuing Calibration 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. 135 - Target analyte was present in blank(s) above the method detection limit but less than the reporting limit. Data is valid for compliance purposes. CL - The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. H1 - Analysis conducted outside the EPA method holding time. HS - Results are from sample aliquot taken from VOA vial with headspace (air bubble greater than 6 mm diameter). j - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. M1 - Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable. M2 - Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable. M4 - The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level. The associated Laboratory Control Spike recovery was acceptable. M6 - Matrix spike and Matrix spike duplicate recovery not evaluated against control limits due to sample dilution. N2 - The lab does not hold accreditation for this parameter. C:\Users\bjstrickland\AppData\Local\Temp\Mayo_BG GW Analytical Results March 2017_597496\Mayo_BG GW Analytical Results March 2017.xlsm Page 5 of 6 TABLE 1 UPDATED BACKGROUND GROUNDWATER ANALYTICAL RESULTS THROUGH MARCH 2O17 MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Methane Molybdenum Nickel Nitrate + Nitrite Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Total Dissolved Solids Total Organic Carbon Vanadium Zinc Radium-226 Radium-228 Uranium-233 Uranium-234 Uranium-236 Uranium-238 Reporting Units ug/L ug/L ug/L mg-N/L mg/L ug/L mg/L ug/L mg/L mg/L ug/L mg/L mg/L ug/L ug/L pCi/L pCi/L ug/mL ug/mL ug/mL ug/mL 15A NCAC 02L Standard NE NE 100 NE NE 20 NE NE 250 NE 0.2* 500 NE 0.3* 1000 NE NE NE NE NE NE Sample ID Sample Collection Date Analytical Results MW 11BR 07 i1 3 i2 9-4-5 -<4 0. 3 54 q-.-7�8 $2 4-7-.3 248 4- <$1 <$2 4-4G $-88 4-5-.-6 -<-5 -<4 -<4 0.00025 MW 11BR nnin6i2n16 --, --, ---- �4 �r3 < �8 -7 < �� 27-6 �i �1 <n 2 Q� � 1ZV �F? �g � <4 �5 <0.00005 <0.00005 <0.00005 0.00(48 TM \ A11BR i 1 / n 8 / 2 n 1 6 5 1.7 2 o Gn D�7 /i �S /� 3/�� 3 G o� �2 /i �S i 5 � TT. 6 3/�� J � /� TQ /n inn �S ^� �L i �� 1ZV /� 8�� 4 9 � /C �J /� -�� ZVT � pi � 0.8i3 �T� <0.00005 <0.00005 <0.00005 0.000i3 na,-r 11BR 02/02/2017 1 9 8-N 2 9-.3 -<4 0.299 6=52 < 5 4 2-&G �'� <0.1 <$2 4-2-G 4- -<-5 $-87 < MW-13BR 06/23/2015 <10 8.28 < 1 <0.01 5.49 < 1 25.7 418 18 0. i i5 <0.2 370 0.9 0.381 36 1.22 <3 <0.00005 <0.00005 <0.00005 <0.0002 MW-13BR 09/08/2015 <10 5.17 < 1 <0.01 M2 5.31 <1 24.8 430 12 <0.1 0.538 360 0.859 0.465 99 - - - - - - MW-13BR 12/02/2015 <10 5.86 7.97 <0.01 5.09 <1 23.3 416 14 <0.2 <0.2 330 0.761 0.429 54 - - - - - - MW-13BR 01/07/2016 25.9 5.81 4.98 <0.01 5.12 <1 23.7 389 15 <0.1 <0.2 330 0.647 <0.3 37 - - - - - - MW-13BR 04/05/2016 27 4.3 <1 <0.01 4.72 <1 20.8 393 17 <0.1 <0.2 340 0.733 <0.3 9 2.65 <3 <0.00005 <0.00005 <0.00005 0.000629 MW-13BR 07/11/2016 54.6 3.2 2.82 <0.01 4.72 <1 19.4 380 18 <0.1 <0.2 330 0.594 0.871 23 2.33 0.773 <0.00005 <0.00005 <0.00005 000i88 MW-13BR 09/06/2016 135 2.98 1.68 <0.01 4.58 <1 18.4 381 16 <0.1 <0.2 132 330 0.645 <0.3 38 67-.-2 <1 <0.00005 <0.00005 <0.00005 0.000451 MW-13BR 11/08/2016 99.6 N2 2.85 2.26 <0.01 4.46 <1 17.3 374 15 <0.1 <0.2 310 0.574 0.38 6 0.472 0.92 <0.00005 <0.00005 <0.00005 0.000419 MW-13BR 02/02/2017 55iN2 2.35 1.3i9 <0..�0n1 4.443 <i1 16.8 35n3 15 <0i.1 <0.2 3n20 0.458 0i.40n6 <n5 1.01 <1 <0.00005 <0.00005 <0.00005 0.000467 M W 14 B R n 3/ 1 2/ 2 n 1 C <T -1-4 < S .3 9 TVQ < S � 4-47 4- < S 2 TT9 1 .i7 1-G - MW-14BR 09/09/2015 13 2-7-.3 <1 0.011 M2 6.56 <1 60.2 167 27 <0.1 <0.2 260 1.3 0.469 <5 - - - - - - MW-14BR 12/02/2015 <10 6.62 <1 0.112 5.75 <1 41.6 141 10 <0.1 <0.2 210 0.822 1.82 <5 - - - - - - M W 14 B R n 1 i n 7 i 2 n 1 6 <� 4% -<4 0.384 4 .-4g < 3-7�4 4-3,14 -1$ <$1 <$2 4-8-9 0.855 z-A-5 -<-5- MW-14BR 04/05/2016 <10 5.06 <1 0.346 4.06 <1 38.4 134 9.9 <0.1 <0.2 200 0.873 2.86 <5 0.999 <3 <0.00005 <0.00005 <0.00005 0.000241 MW-14BR 07/11/2016 <10 8.07 <1 0.157 5.18 <1 47.9 140 11 <0.1 <0.2 200 0.84 2.48 11 0.947 <1 <0.00005 <0.00005 <0.00005 0.000456 i"- W 14BR n n i n 7 i 2 n 1 6 9 -. -5 7 -<4 0-i9 i q-. -1-3 -<4 46.3 M4 4-&8 4- <$1 <$2 2-3G 0-887 2-. 0-7 -7 -2 < n n n n 31 4 MW-14BR 11/08/2016 12.2 N2 10.7 <1 0.187 6.78 <1 49.9 158 9.6 <0.1 <0.2 220 0.785 1.56 6 1.07 1 <0.00005 <0.00005 <0.00005 0.000389 MW-14BR 02/02/2017 <10 N2 5.04 <1 0.291 4.04 <1 38.4 150 8.6 <0.1 <0.2 200 0.832 2.07 <5 <1 <1 <0.00005 <0.00005 <0.00005 0.000205 Total Count of Valid Samples #NAME? #NAME? I #### I #NAME? I #NAME? I #NAME? I #NAME? I #NAME? I #NAME? I #NAME? #NAME? I #NAME? I #NAME? I #NAME? I#### I #NAME? #NAME? #NAME? #NAME? #NAME? #NAME? Prepared by: JHG / RKD Checked by: RHJ Notes: -54 - Indicates value omitted from dataset. - Indicates parameter not measured or analyzed. - Indicates data removed /identified as an outlier - Indicates data removed due to autocorrelation < - concentration not detected at or above the adjusted reporting limit. pCi/L - picocuries per liter mg - N/L - Milligrams nitrogen per liter S.U. - Standard Unit mg/L - Milligrams per liter ug/L - Micrograms per liter NE - Not established ug/mL - micrograms per milliliter NTU - Nephelometric turbidity unit * - 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. Analyte concentration in sample could be due to blank contamination. 131 - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample was greater than 10X the concentration in the method blank. Analyte concentration in sample is not affected by blank contamination. 132 - 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. 133 - Target analyte was detected in Continuing Calibration 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. 135 - Target analyte was present in blank(s) above the method detection limit but less than the reporting limit. Data is valid for compliance purposes. CL - The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. 1-11 - Analysis conducted outside the EPA method holding time. HS - Results are from sample aliquot taken from VOA vial with headspace (air bubble greater than 6 mm diameter). j - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. M1 - Matrix spike recovery was high: the associated Laboratory Control Spike (LCS) was acceptable. M2 - Matrix spike recovery was Low: the associated Laboratory Control Spike (LCS) was acceptable. M4 - The spike recovery value was unusable since the analyte concentration in the sample was disproportionate to the spike level. The associated Laboratory Control Spike recovery was acceptable. M6 - Matrix spike and Matrix spike duplicate recovery not evaluated against control limits due to sample dilution. N2 - The lab does not hold accreditation for this parameter. C:\Users\bjstrickland\AppData\Local\Temp\Mayo_BG GW Analytical Results March 2017_597496\Mayo_BG GW Analytical Results March 2017.xlsm Page 6 of 6