NC0001422_Review of Progress Energy's LV Sutton Steam Plant_20110503

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NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
May 3, 2011
J. Mark Frederick, Plant Manager
Sutton Steam Electric Plant
Progress Energy
801 Sutton Steam Plant Road
Wilmington, NC 28401
Subject: Review of Progress Energy's L.V. Sutton Steam Plant(NPDES Permit NC0001422):
"Request for Mercury Analysis of Fish from the Lower Cape Fear River,April 29, 2011".
Dear Mr. Frederick,
Thank you for your continued efforts to provide the North Carolina Division of Water Quality with annual fish
selenium monitoring data from the lower Cape Fear River. Furthermore,we are in receipt of your April 29,
2011 report which also contains simultaneous mercury data from fish in the lower Cape Fear River.The
North Carolina Division of Water Quality would like to take this opportunity to commend Progress Energy's
efforts in collection of these data prior to the replacement of the coal-fired units.
If you should have any questions, please do not hesitate to contact me or my staff.
Sincerely,
Jay H. gauger
Chief,Environmental Sciences Section
Cc: Chuck Waklid, Deputy Director
Matt Matthews, Surface Water Protection Section
Tom Belnick. NPDES Complex Permitting Unit
Rick Shiver,Wilmington Regional Office
Environmental Sciences Section
1621 Mail Service Center,Raleigh,North Carolina 27699-1621
Location:4401 Reedy Cr Road.Raleigh,North Carolina 27604
Phone:[phone] FAX:[phone] Customer Service:1-877-623-6748 One
Internet:www.ncwaterquality.org NorthCarolliina
An Equal Opportunity I Affirmative Action Employer Naturally

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Progress Energy
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File No.: TT 12520-B April 29,2011
Mr.Jay H. Sauber
Chief,Environmental Sciences Section
North Carolina Division of Water Quality
1621 Mail Service Center
Raleigh,NC 27699-1621
Subject: Carolina Power&Light Company d/b/a Progress Energy Carolinas, Inc.(Progress Energy)
L.V. Sutton Electric Plant NPDES Permit NC0001422
Request for Mercury Analysis of Fish from the Lower Cape Fear River
Dear Mr. Sauber:
Progress Energy received your letter dated March 17,2011,requesting simultaneous mercury analysis of fish from
the Lower Cape Fear River during all subsequent fish tissue selenium concentration monitoring efforts required in
the L.V. Sutton Electric Plant NPDES Permit. Currently the permit requires annual fish tissue analysis if the outfall
from the ash pond discharges to the river for 120 days in a calendar year. The baseline selenium concentrations
reported for data collected in 1999 and all subsequent required annual reports for these data have been provided to
the Division of Water Quality. In support of your request,Progress Energy will provide fish tissue mercury analysis
data,along with selenium analysis data, from samples collected during subsequent fish tissue selenium
concentration monitoring efforts.
Progress Energy understands DWQ's desire to obtain fish tissue mercury concentration information from the river
prior to the replacement of the coal-fired units by the combined cycle powerblock. Enclosed are mercury
concentration data that have been analyzed simultaneously with the selenium concentration data in fish tissue
samples from the Lower Cape Fear River since 1999(Tables 1-7). Progress Energy fish tissue trace element
methodology results in total mercury dry weight concentrations(.tg/g). Based on the dry-to-fresh weight ratio, the
calculated total mercury fresh weight concentrations are also presented.
Please contact Ms. Robin Bryson,Environmental Specialist in our corporate office,at(919)546-3962,if there are
any questions with this submittal.
I certify, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person orpersons who manage the system,
or those persons directly responsible for gathering the information, the information submitted is, to the best
of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties
for submitting false information, including the possibility of fines and imprisonment for knowing violations.
Sincerely,
J. Mark Frederick, Plant Manager
L. V. Sutton Electric Plant C/t
JMF/rb Jc
Enclosures Eigiggiowg@ cc: Robin Bryson
. - ' - - _
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Matt Matthews,Surface Water Protection Section LAPR 2 9 2011
Rick Shiver,Wilmington Regional Office
Chuck Wakild,Deputy Director DENR-WATER QUALITY
POINT SOURCE BRANCH
Progress Energy Carolinas,Inc.
S.nton Steam Plant
801 Sutton Steam Plant Roan
Wilminatort NC 28401

1
Fish Tissue Mercury Data, 1999,2004-2010 NPDES Permit NC001422
Table 1. Total mercury concentrations in axial muscle of fish from the lower Cape Fear River, 1999.
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average'
Fish Species Level Station' (mm) (g) pg/g) pg/g) ratio Count (mg/kg) (mg/kg)
Bluegill 3 UP 142 49 5.2 0.94 0.18
Bluegill 3 UP 153 66 6.5 1.24 0.19
Bluegill 3 UP 153 66 2.2 0.42 0.19
Blue catfish 3 UP 427 618 1.8 0.32 0.18
Blue catfish 3 UP 310 242 5.8 0.93 0.16
Blue catfish 3 UP 421 572 3.7 0.67 0.18 6 0.68 0.68
Bluegill 3 DI 141 52 3.5 0.67 0.19
Bluegill 3 DI 145 48 3.4 0.61 0.18
Bluegill 3 DI 146 51 2.5 0.53 0.21
Blue catfish 3 DI 131 35 1.9 0.32 0.17 4 0.51 0.51
Bluegill 3 DW 130 33 2.1 0.38 0.18
Bluegill 3 DW 195 152 5.0 1.00 0.20 2 0.61 0.61
0.60
'Station locations: UP=Upstream of the effluent discharge,DI=Discharge area,and DW=Downstream.
2Weighted Average is developed consistent with Guidance for Implementing the January 2001 Methylmercury Water
Quality Criterion,April 2010,EPA 823-R-10-001.
Progress Energy Carolinas,Inc. 1 L.V.Sutton Electric Plant

Fish Tissue Mercury Data,1999,2004-2010 NPDES Permit NC001422
Table 2.Total mercury concentrations in axial muscle of fish from the lower Cape Fear River, 2004.
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average=
Fish Species Level Station' (mm) (CO pg/g) pg/g) ratio Count (mg/kg) (mg/kg)
Bluegill 3 UP 181 128 <0.9 0.09 0.20
Bluegill 3 UP 186 128 1.0 0.21 0.21
Blue catfish 3 UP 482 400 <0.8 0.07 0.18
Blue catfish 3 UP 400 440 0.8 0.14 0.18
Blue catfish 3 UP 333 280 <0.8 0.07 0.17
Blue catfish 3 UP 364 325 1.0 0.21 0.21 6 0.12
Largemouth bass 4 UP 211 130 <0.9 0.09 0.20
Largemouth bass 4 UP 290 305 <0.9 0.09 0.20
Largemouth bass 4 UP 272 250 1.8 0.38 0.21
Largemouth bass 4 UP 316 470 <0.8 0.08 0.20
Largemouth bass 4 UP 266 265 0.8 0.17 0.21
Largemouth bass 4 UP 290 340 <0.8 0.08 0.21 6 0.12 0.12
Bluegill 3 DI 167 85 <0.9 0.09 0.20
Bluegill 3 DI 218 205 <1.0 0.11 0.21
Bluegill 3 DI 225 232 <0.8 0.08 0.20
Bluegill 3 DI 230 237 1.7 0.33 0.20
Bluegill 3 DI 196 145 1.5 0.30 0.20
Blue catfish 3 DI 402 540 <0.8 0.07 0.17
Blue catfish 3 DI 723 4,500 2.5 0.43 0.17 7 0.16
Largemouth bass 4 DI 385 910 <0.8 0.09 0.21 1 0.09 0.13
Bluegill 3 DW 151 60 <0.8 0.08 0.20
Pumpkinseed 3 DW 164 85 <0.8 0.08 0.20
Blue catfish 3 DW 747 5,000 0.4 0.06 0.15
Blue catfish 3 DW 413 610 1.0 0.18 0.18
Blue catfish 3 DW 482 972 <0.8 0.07 0.17
Blue catfish 3 DW 530 1,500 1.3 0.23 0.17 6 0.10
Channel catfish 4 DW 412 482 1.0 0.18 0.18
Largemouth bass 4 DW 384 896 <0.8 0.08 0.21
Largemouth bass 4 DW 301 372 <0.8 0.05 0.12
Largemouth bass 4 DW 306 402 <0.9 0.10 0.21 3 0.07 0.09
0.11
'Station locations: UP=Upstream of the effluent discharge,DI=Discharge area,and DW=Downstream.
2Weighted Average is developed consistent with Guidance for Implementing the January 2001 Methylmercury Water
Quality Criterion, April 2010,EPA 823-R-10-001.
Progress Energy Carolinas,Inc. 2 L.V.Sutton Electric Plant

Fish Tissue Mercury Data,1999,2004-2010 NPDES Permit NC001422
,
Table 3. Total mercury concentrations in axial muscle of fish from the lower Cape Fear River, 2005.
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average'
Fish Species Level Station' (mm) (g) pglg) pg/g) ratio Count (mg/kg) (mg/kg)
Bluegill 3 UP 197 161 <0.9 0.09 0.20
Bluegill 3 UP 203 176 <0.9 0.09 0.20
Bluegill 3 UP 201 170 <0.9 0.09 0.20
Bluegill 3 UP 190 160 <0.8 0.08 0.21
Bluegill 3 UP 168 106 <0.9 0.09 0.20
Bluegill 3 UP 158 82 <0.8 0.08 0.20
Bluegill 3 UP 167 91 <0.8 0.08 0.20
Bluegill 3 UP 157 70 <0.8 0.08 0.20
Bluegill 3 UP 169 86 0.8 0.14 0.18
Bluegill 3 UP 207 186 2.3 0.46 0.20
Blue catfish 3 UP 427 624 <1 0.10 0.19
Blue catfish 3 UP 473 928 <0.8 0.07 0.18
Blue catfish 3 UP 420 614 <0.9 0.08 0.18
Blue catfish 3 UP 423 600 <0.8 0.07 0.17
Blue catfish 3 UP 400 540 <2 0.18 0.18
Blue catfish 3 UP 502 974 1.9 0.35 0.18
Blue catfish 3 UP 500 1,050 1.5 0.27 0.18
Blue catfish 3 UP 460 840 1.8 0.33 0.18
Blue catfish 3 UP 377 435 <0.8 0.07 0.19
Blue catfish 3 UP 366 390 1.6 0.29 0.18 20 0.13
Largemouth bass 4 UP 308 440 <1 0.10 0.21
Largemouth bass 4 UP 318 468 <0.8 0.08 0.21
Largemouth bass 4 UP 293 362 <0.9 0.10 0.21
Largemouth bass 4 UP 313 473 1 0.21 0.21
Largemouth bass 4 UP 344 540 <0.8 0.08 0.21
Largemouth bass 4 UP 338 546 <0.9 0.09 0.21
Largemouth bass 4 UP 292 348 <0.8 0.08 0.21
Largemouth bass 4 UP 288 346 <0.8 0.08 0.21
Largemouth bass 4 UP 284 318 0.6 0.12 0.21
Largemouth bass 4 UP 287 308 <0.9 0.09 0.21 10 0.10 0.12
Bluegill 3 DI 157 70 <0.9 0.08 0.17
Bluegill 3 DI 141 48 <0.8 0.08 0.20
Bluegill 3 DI 159 77 <0.9 0.09 0.20
Bluegill 3 DI 162 58 <0.8 0.09 0.22
Bluegill 3 DI 138 46 <0.8 0.08 0.19
Bluegill 3 DI 247 302 <0.8 0.07 0.17
Bluegill 3 DI 169 89 <0.7 0.07 0.20
Bluegill 3 DI 178 112 <0.8 0.08 0.21
Bluegill 3 DI 187 118 <0.8 0.08 0.21
Bluegill 3 DI 138 52 <0.7 0.07 0.20
Blue catfish 3 DI 388 480 <0.9 0.08 0.18
Blue catfish 3 DI 273 160 <0.8 0.06 0.15
Blue catfish 3 DI 285 178 <0.8 0.07 0.17
Blue catfish 3 DI 258 120 <0.9 0.08 0.17
Blue catfish 3 DI 490 970 <0.9 0.08 0.18
Blue catfish 3 DI 405 502 1.5 0.26 0.18
Warmouth 3 DI 165 95 <0.8 0.04 0.10 17 0.08
Channel catfish 4 DI 315 222 <0.8 0.07 0.19
Flathead catfish 4 DI 397 618 <0.8 0.07 0.18
Flathead catfish 4 DI 417 610 0.9 0.16 0.18
Flathead catfish 4 DI 564 2,000 1.7 0.31 0.18
Flathead catfish 4 DI 358 410 0.4 0.07 0.18
Flathead catfish 4 DI 365 430 <0.8 0.07 0.18
Largemouth bass 4 DI 348 604 <0.8 0.09 0.22
Largemouth bass 4 DI 296 312 <0.8 0.08 0.21
Largemouth bass 4 DI 303 380 <0.8 0.09 0.21
Progress Energy Carolinas,Inc. 3 L.V.Sutton Electric Plant

Fish Tissue Mercury Data,1999,2004-2010 NPDES Permit NC001422
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average'
Fish Species Level Station' (nm) (9) pg/g) pg/g) ratio Count (mg/kg) (mg/kg)
Largemouth bass 4 DI 302 382 1.4 0.29 0.21
Largemouth bass 4 DI 339 564 0.4 0.08 0.21
Largemouth bass 4 DI 405 742 0.6 0.13 0.21
Largemouth bass 4 DI 313 420 <0.8 0.09 0.22 7 0.11 0.09
Bluegill 3 DW 185 124 <0.8 0.08 0.20
Blue catfish 3 DW 395 498 <1.4 0.13 0.18
Blue catfish 3 DW 530 1,250 <0.8 0.07 0.18
Blue catfish 3 DW 485 886 1.1 0.20 0.18
Blue catfish 3 DW 510 1,050 <0.9 0.09 0.19
Blue catfish 3 DW 437 690 3.2 0.60 0.19
Blue catfish 3 DW 340 308 <0.8 0.07 0.18
Blue catfish 3 DW 423 617 <0.8 0.07 0.18
Blue catfish 3 DW 360 360 <0.8 0.07 0.18 9 0.11
Channel catfish 4 DW 485 922 2.4 0.44 0.19
Flathead catfish 4 DW 316 272 <0.8 0.07 0.18
Flathead catfish 4 DW 543 1,700 0.5 0.10 0.20
Largemouth bass 4 DW 328 498 <0.9 0.09 0.21
Largemouth bass 4 DW 315 458 <0.7 0.08 0.22
Largemouth bass 4 DW 355 704 0.8 0.17 0.21
Largemouth bass 4 DW 358 742 <0.8 0.08 0.21
Largemouth bass 4 DW 292 345 <0.8 0.09 0.22
Largemouth bass 4 DW 382 725 <0.9 0.09 0.21
Largemouth bass 4 DW 325 602 <0.8 0.09 0.21
Largemouth bass 4 DW 315 526 <0.8 0.08 0.21
Largemouth bass 4 DW 275 312 0.7 0.15 0.21
Largemouth bass 4 DW 256 258 1 0.19 0.19 13 0.11 0.11
0.11
1Station locations: UP=Upstream of the effluent discharge,DI=Discharge area,and DW=Downstream.
2Weighted Average is developed consistent with Guidance for Implementing the January 2001 Methylmercury Water
Quality Criterion,April 2010 ,EPA 823-R-10-001.
Progress Energy Carolinas,Inc. 4 L.V.Sutton Electric Plant

Fish Tissue Mercury Data, 1999,2004-2010 NPDES Permit NC001422
Table 4.Total mercury concentrations in axial muscle of fish from the lower Cape Fear River, 2007.
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average'
Fish Species Level Station' (mm) (g) pg/g) Ng/g) ratio Count (mg/kg) (mg/kg)
Bluegill 3 UP 196 137 1.1 0.22 0.20
Bluegill 3 UP 212 225 0.9 0.18 0.20
Bluegill 3 UP 206 206 1.3 0.26 0.20
Bluegill 3 UP 200 183 0.9 0.19 0.21
Bluegill 3 UP 181 118 0.9 0.18 0.20
Bluegill 3 UP 182 122 0.6 0.12 0.20
Bluegill 3 UP 167 88 0.4 0.08 0.20
Bluegill 3 UP 190 133 0.8 0.16 0.20
Bluegill 3 UP 191 154 0.9 0.19 0.21
Bluegill 3 UP 162 84 0.8 0.15 0.19
Blue catfish 3 UP 360 390 1.3 0.31 0.24
Blue catfish 3 UP 806 5,600 2.6 0.47 0.18
Blue catfish 3 UP 842 7,350 1.8 0.31 0.17
Blue catfish 3 UP 498 1,150 <0.8 0.07 0.17 14 0.18
Flathead catfish 4 UP 577 2,200 <0.8 0.07 0.18
Flathead catfish 4 UP 509 1,400 <0.8 0.07 0.18
Flathead catfish 4 UP 541 1,650 5.2 0.94 0.18
Flathead catfish 4 UP 692 3,925 1.9 0.36 0.19
Flathead catfish 4 UP 438 1,000 <0.8 0.07 0.17
Flathead catfish 4 UP 476 1,100 <0.8 0.08 0.19
Largemouth bass 4 UP 325 510 0.7 0.15 0.21
Largemouth bass 4 UP 266 174 <0.8 0.08 0.21
Largemouth bass 4 UP 285 352 <0.8 0.09 0.22
Largemouth bass 4 UP 267 300 0.7 0.15 0.21
Largemouth bass 4 UP 238 218 <0.7 0.07 0.21
Largemouth bass 4 UP 248 215 <0.9 0.09 0.21
Largemouth bass 4 UP 257 247 <0.7 0.07 0.20
Largemouth bass 4 UP 237 217 <0.8 . 0.08 0.21
Largemouth bass 4 UP 266 298 <0.7 0.07 0.21 15 0.11 0.15
Bluegill 3 DI 212 192 1.1 0.21 0.19
Bluegill 3 DI 237 321 1.1 0.23 0.21
Bluegill 3 DI 217 224 1.3 0.29 0.22
Bluegill 3 DI 198 150 0.9 0.18 0.20
Bluegill 3 DI 232 274 0.9 0.18 0.20
Bluegill 3 DI 175 106 0.5 0.11 0.21
Bluegill 3 DI 208 164 0.6 0.12 0.20
Bluegill 3 DI 176 119 0.8 0.14 0.18
Bluegill 3 DI 204 186 0.4 0.08 0.21
Bluegill 3 DI 179 106 <0.3 0.03 0.19
Blue catfish 3 DI 422 607 1 0.19 0.19
Blue catfish 3 DI 367 385 <0.8 0.07 0.18
Blue catfish 3 DI 706 4,700 1.7 0.32 0.19
Blue catfish 3 DI 632 3,250 1.6 0.30 0.19
Blue catfish 3 DI 467 896 <0.8 0.06 0.16
Blue catfish 3 DI 637 2,600 <0.8 0.08 0.20
Blue catfish 3 DI 700 4,025 2 0.34 0.17
Blue catfish 3 DI 768 4,950 2.4 0.43 0.18
Blue catfish 3 DI 788 6,100 1 0.21 0.21 19 0.15
Channel catfish 4 DI 516 1,225 <0.8 0.07 0.18
Largemouth bass 4 DI 368 697 <0.8 0.08 0.21
Largemouth bass 4 DI 270 300 <0.8 0.08 0.21
Largemouth bass 4 DI 342 580 <0.7 0.08 0.22
Largemouth bass 4 DI 283 364 <0.7 0.07 0.21
Progress Energy Carolinas,Inc. 5 L.V.Sutton Electric Plant

Fish Tissue Mercury Data, 1999,2004-2010 NPDES Permit NC001422
,
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average'
Fish Species Level Station' (mm) (9) pg/g) pg/g) ratio Count (mg/kg) (mg/kg)
Largemouth bass 4 DI 385 776 0.9 0.18 0.20
Largemouth bass 4 DI 293 398 <0.7 0.08 0.22
Largemouth bass 4 DI 258 223 <0.7 0.07 0.20
Largemouth bass 4 DI 277 351 <0.8 0.09 0.22
Largemouth bass 4 DI 299 398 <0.7 0.08 0.22
Largemouth bass 4 DI 261 242 <0.7 0.07 0.20 11 . 0.08 0.13
Blue catfish 3 DW 453 744 2 0.42 0.21
Blue catfish 3 DW 660 3,650 2.2 0.44 0.20
Blue catfish 3 DW 879 9,150 3.1 0.59 0.19
Blue catfish 3 DW 401 523 <0.9 0.09 0.19
Blue catfish 3 DW 716 4,250 0.9 0.17 0.19
Blue catfish 3 DW 709 3,900 0.9 0.17 0.19
Blue catfish 3 OW 790 7,250 <0.8 0.08 0.21
Blue catfish 3 DW 785 6,150 2.4 0.46 0.19
Blue catfish 3 DW 704 3,750 0.5 0.10 0.20
Blue catfish 3 DW 443 758 <0.8 0.07 0.18 10 0.19 0.19
0.15
'Station locations: UP=Upstream of the effluent discharge,DI=Discharge area,and DW=Downstream.
2Weighted Average is developed consistent with Guidance for Implementing the January 2001 Methylmercury Water
Quality Criterion,April 2010,EPA 823-R-10-001.
•
Progress Energy Carolinas,Inc. 6 L.V.Sutton Electric Plant

Fish Tissue Mercury Data, 1999,2004-2010 NPDES Permit NC001422
Table 5.Total mercury concentrations in axial muscle of fish from the lower Cape Fear River, 2008.
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average'
Fish Species Level Station' (mm) (g) pg/g) pg/g) ratio Count (mg/kg) (mg/kg)
Bluegill 3 UP 162 71 <0.7 0.07 0.19
Bluegill 3 UP 168 62 <0.8 0.08 0.19
Bluegill 3 UP 189 123 1.6 0.30 0.19
Bluegill 3 UP 209 221 <0.8 0.08 0.21
Bluegill 3 UP 173 92 <0.8 0.08 0.19
Bluegill 3 UP 180 111 <0.7 0.06 0.18
Bluegill 3 UP 171 100 1 0.20 0.20
Bluegill 3 UP 208 192 <0.7 0.07 0.19
Blue catfish 3 UP 628 2,650 <0.8 0.07 0.18
Blue catfish 3 UP 724 4,600 1.6 0.29 0.18
Warmouth 3 UP 209 210 2.5 0.45 0.18
Warmouth 3 UP 193 179 1.8 0.34 0.19 12 0.13
Flathead catfish 4 UP 464 882 1.6 0.30 0.19
Flathead catfish 4 UP 580 2,100 <0.8 0.07 0.18
Flathead catfish 4 UP 685 3,650 <0.7 0.06 0.18
Flathead catfish 4 UP 636 2,700 <0.7 0.07 0.19
Flathead catfish 4 UP 556 1,950 <0.7 0.07 0.19
Flathead catfish 4 UP 542 1,600 <0.8 0.07 0.18
Flathead catfish 4 UP 490 1,100 0.8 0.14 0.18
Flathead catfish 4 UP 491 1,100 <0.7 0.06 0.18
Largemouth bass 4 UP 405 1,000 <0.8 0.08 0.19
Largemouth bass 4 UP 299 432 <0.7 0.07 0.21
Largemouth bass 4 UP 336 478 <0.8 0.08 0.20
Largemouth bass 4 UP 446 1,250 1.6 0.30 0.19
Largemouth bass 4 UP 372 684 0.9 0.18 0.20
Largemouth bass 4 UP 316 430 <0.7 0.07 0.20
Largemouth bass 4 UP 444 1,250 <0.8 0.08 0.21
Largemouth bass 4 UP 349 560 <0.8 0.08 0.21
Largemouth bass 4 UP 285 339 <0.7 0.07 0.20
Largemouth bass 4 UP 337 580 <0.7 0.07 0.21 18 0.09 0.12
Bluegill 3 DI 199 197 0.4 0.08 0.21
Bluegill 3 DI 209 219 <0.7 0.07 0.21
Bluegill 3 DI 206 183 <0.8 0.07 0.18
Bluegill 3 DI 219 228 <0.7 0.07 0.20
Bluegill 3 DI 201 174 <0.7 0.07 0.19
Bluegill 3 DI 170 105 <0.7 0.06 0.17
Bluegill 3 DI 191 132 <0.7 0.07 0.19
Bluegill 3 DI 158 80 <0.8 0.06 0.15
Bluegill 3 DI 174 100 <0.8 0.08 0.19
Blue catfish 3 DI 665 3,100 0.8 0.15 0.19
Blue catfish 3 DI 626 2,550 0.8 0.14 0.17
Blue catfish 3 DI 648 2,900 <0.9 0.09 0.19
Blue catfish 3 DI 654 2,900 1.5 0.26 0.17
Blue catfish 3 DI 769 4,550 2.7 0.49 0.18
Blue catfish 3 DI 810 7,150 0.8 0.15 0.19
Blue catfish 3 DI 520 1,450 1.3 0.25 0.19
Blue catfish 3 DI 391 544 <0.7 0.06 0.18
Blue catfish 3 DI 395 458 <0.8 0.07 0.18 18 0.10
Flathead catfish 4 DI 465 912 1.4 0.25 0.18
Largemouth bass 4 DI 268 270 <0.8 0.08 0.19
Largemouth bass 4 DI 219 142 <0.7 0.07 0.20 2 0.11 0.11
Blue catfish 3 DW 715 4,150 2.5 0.45 0.18
Blue catfish 3 DW 545 1,550 <0.8 0.07 0.18
Progress Energy Carolinas,Inc. 7 L.V.Sutton Electric Plant

•
Fish Tissue Mercury Data, 1999,2004-2010 NPDES Permit NC001422
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average
Fish Species Level Station' (mm) (g) pg/g) pg/g) ratio Count (mg/kg) (mg/kg)
Blue catfish 3 DW 589 2,100 1.6 0.30 0.19
Blue catfish 3 DW 648 2,850 1 0.16 0.16
Blue catfish 3 OW 665 3,200 <0.8 0.08 0.20
Blue catfish 3 DW 723 4,500 <0.8 0.08 0.21
Blue catfish 3 DW 803 6,050 1.8 0.32 0.18
Blue catfish 3 DW 873 8,850 1.2 0.24 0.20
Blue catfish 3 DW 828 6,200 1.7 0.31 0.18
Blue catfish 3 DW 840 7,500 1.6 0.27 0.17 10 0.19 0.19
0.13
tStation locations: UP=Upstream of the effluent discharge, DI=Discharge area,and DW=Downstream.
2Weighted Average is developed consistent with Guidance for Implementing the January 2001 Methylmercury Water
Duality Criterion, April 2010,EPA 823-R-10-001.
Progress Energy Carolinas,Inc. 8 L.V.Sutton Electric Plant

Fish Tissue Mercury Data, 1999,2004-2010 NPDES Permit NC001422
Table 6. Total mercury concentrations in axial muscle of fish from the lower Cape Fear River, 2009.
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average'
Fish Species Level Station' (mm) (g) pg/g) pg/g) ratio Count (mg/kg) (mg/kg)
Bluegill 3 UP 191 124 <0.7 0.07 0.20
Bluegill 3 UP 177 113 <0.8 0.08 0.19
Bluegill 3 UP 207 179 1.7 0.29 0.17
Bluegill 3 UP 191 144 <0.7 0.07 0.19
Bluegill 3 UP 184 133 <0.7 0.07 0.20
Pumpkinseed 3 UP 168 107 <0.8 0.08 0.19
Pumpkinseed 3 UP 167 93 <0.8 0.08 0.19
Pumpkinseed 3 UP 168 96 <0.8 0.08 0.20
Blue catfish 3 UP 838 8,100 1.7 0.32 0.19
Blue catfish 3 UP 819 6,800 4.5 0.72 0.16
Blue catfish 3 UP 733 5,100 1 0.19 0.19
Blue catfish 3 UP 650 3,250 <0.7 0.06 0.16
Blue catfish 3 UP 524 1,550 1.2 0.22 0.18
Warmouth 3 UP 150 82 <0.7 0.07 0.20
Warmouth 3 UP 160 94 2.1 0.40 0.19 15 0.13
Flathead catfish 4 UP 637 3,050 <0.7 0.07 0.19
Flathead catfish 4 UP 656 3,450 <0.7 0.06 0.18
Flathead catfish 4 UP 604 2,150 <0.8 0.08 0.19
Flathead catfish 4 UP 470 1,050 <0.7 0.07 0.19
Flathead catfish 4 UP 656 3,550 1.6 0.29 0.18
Largemouth bass 4 UP 285 223 0.6 0.12 0.20
Largemouth bass 4 UP 297 388 1 0.21 0.21
Largemouth bass 4 UP 244 215 1.2 0.24 0.20
Largemouth bass 4 UP 258 263 1.2 0.24 0.20
Largemouth bass 4 UP 327 606 <0.7 0.07 0.21
Largemouth bass 4 UP 256 256 <0.8 0.08 0.20
Largemouth bass 4 UP 333 508 <0.7 0.07 0.20
Largemouth bass 4 UP 278 324 <0.8 0.08 0.21
Largemouth bass 4 UP 365 756 0.9 0.18 0.20
Largemouth bass 4 UP 362 740 <0.7 0.07 0.21 15 0.11 0.12
Bluegill 3 DI 211 221 <0.8 0.08 0.20
Bluegill 3 DI 197 152 <0.7 0.07 0.19
BluegIll 3 DI 166 91 <0.7 0.07 0.20
Bluegill 3 DI 215 237 <0.7 0.07 0.20
Bluegill 3 DI 192 160 0.9 0.20 0.22
Bluegill 3 DI 173 102 <0.7 0.07 0.19
BluegIll 3 DI 192 136 <0.7 0.07 0.21
Bluegill 3 DI 198 179 <0.7 0.08 0.22
Bluegill 3 DI 204 199 <0.7 0.07 0.21
Bluegill 3 DI 225 274 <0.7 0.07 0.20
Blue catfish 3 DI 713 4,550 1.9 0.32 0.17
Blue catfish 3 DI 702 3,500 1 0.17 0.17
Blue catfish 3 DI 604 2,175 <0.8 0.07 0.18
Blue catfish 3 DI 450 881 <0.7 0.07 0.20 14 0.09
Flathead catfish 4 DI 891 7,500 2.8 0.53 0.19
Flathead catfish 4 DI 685 3,900 1.6 0.30 0.19
Flathead catfish 4 DI 595 2,450 <0.8 0.08 0.19
Flathead catfish 4 DI 756 4,650 2.6 0.49 0.19
Flathead catfish 4 DI 566 1,800 <0.7 0.07 0.19
Flathead catfish 4 Dl 340 362 <0.7 0.06 0.18
Largemouth bass 4 DI 285 355 <0.8 0.08 0.20
Largemouth bass 4 DI 383 1,044 <0.8 0.08 0.20
Progress Energy Carolinas,Inc. 9 L.V.Sutton Electric Plant

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Fish Tissue Mercury Data,1999,2004-2010 NPDES Permit NC001422
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average'
Fish Species Level Station' (mm) (g) lig/g) pg/g) ratio Count (mg/kg) (mg/kg)
Largemouth bass 4 DI 462 1,500 <0.8 0.08 0.20
Largemouth bass 4 DI 292 380 1.1 0.23 0.21
Largemouth bass 4 DI 268 293 <0.8 0.08 0.20
Largemouth bass 4 DI 296 430 <0.7 0.07 0.21
Largemouth bass 4 DI 318 501 <0.7 0.07 0.21
Largemouth bass 4 DI 277 308 <0.7 0.07 0.21
Largemouth bass 4 DI 289 400 <0.8 0.09 0.22
Largemouth bass 4 DI 311 450 0.6 0.12 0.20 16 0.12 0.10
Bluegill 3 DW 172 106 0.9 0.14 0.16
Bluegill 3 DW 193 171 0.8 0.15 0.19
Bluegill 3 DW 193 162 0.8 0.16 0.20
Bluegill 3 DW 163 78 1 0.20 0.20
Bluegill 3 DW 152 70 0.6 0.10 0.17
Bluegill 3 DW 140 66 0.4 0.07 0.18
Bluegill 3 DW 133 51 0.5 0.10 0.19
Bluegill 3 DW 128 40 0.5 0.09 0.18
Bluegill 3 DW 120 32 0.5 0.09 0.18
Blue catfish 3 DW 720 4,250 <0.7 0.07 0.19
Blue catfish 3 DW 635 3,000 0.8 0.15 0.19 •
Blue catfish 3 DW 720 3,550 <0.8 0.08 0.19
Blue catfish 3 DW 703 4,400 1.1 0.21 0.19
Blue catfish 3 DW 658 3,150 <0.9 0.08 0.17
Blue catfish 3 DW 718 4,050 <0.9 0.08 0.18
Blue catfish 3 DW 685 3,500 <0.8 0.08 0.19
Blue catfish 3 DW 640 2,150 1.7 0.32 0.19 17 0.11
Flathead catfish 4 DW 662 3,000 1.6 0.27 0.17
Flathead catfish 4 DW 726 3,850 2.6 0.42 0.16
Largemouth bass 4 DW 310 498 <0.7 0.07 0.21
Largemouth bass 4 DW 314 460 <0.7 0.07 0.20
Largemouth bass 4 DW 352 726 <0.7 0.07 0.20
Largemouth bass 4 DW 317 472 1.3 0.27 0.21
Largemouth bass 4 DW 365 874 0.8 0.17 0.21
Largemouth bass 4 DW 275 413 <0.7 0.07 0.21
Largemouth bass 4 DW 268 302 <0.7 0.07 0.20
Largemouth bass 4 DW 328 595 0.6 0.13 0.21
Largemouth bass 4 DW 195 98 <0.8 0.08 0.20
Largemouth bass 4 DW 203 126 <0.7 0.07 0.20 12 0.12 0.12
0.11
'Station locations: UP=Upstream of the effluent discharge,DI=Discharge area,and DW=Downstream.
2Weighted Average is developed consistent with Guidance for Implementing the January 2001 Methylmercury Water
Quality Criterion.April 2010 ,EPA 823-R-10-001.
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Progress Energy Carolinas,Inc. 10 L.V.Sutton Electric Plant

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- Fish Tissue Mercury Data, 1999,2004-2010 NPDES Permit NC001422
Table 7.Total mercury concentrations in axial muscle of fish from the lower Cape Fear River, 2010.
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average'
Fish Species Level Station' (mm) (g) pg/g) pg/g) ratio Count (mg/kg) (mg/kg)
Bluegill 3 UP 196 189 <0.8 0.09 0.22
Bluegill 3 UP 201 194 <0.8 0.08 0.21
Bluegill 3 UP 168 98 0.7 0.14 0.20
Pumpkinseed 3 UP 180 112 1.3 0.23 0.18
Pumpkinseed 3 UP 163 82 1.2 0.24 0.20
Pumpkinseed 3 UP 176 109 1.2 0.24 0.20
Pumpkinseed 3 UP 164 98 0.5 0.10 0.20
Pumpkinseed 3 UP 157 86 1.2 0.22 0.18
Pumpkinseed 3 UP 166 105 0.5 0.10 0.19
Pumpkinseed 3 UP 163 86 1.2 0.22 0.18
Blue catfish 3 UP 705 4,075 0.2 0.05 0.26
Blue catfish 3 UP 490 975 1.6 0.22 0.14
Blue catfish 3 UP 728 4,040 <0.8 0.07 0.18
Blue catfish 3 UP 622 2,450 1.5 0.26 0.17
Blue catfish 3 UP 710 4,600 0.9 0.17 0.19
Blue catfish 3 UP 631 2,800 <0.7 0.06 0.16
Blue catfish 3 UP 701 3,600 <0.6 0.06 0.19
Blue catfish 3 UP 517 5,150 <0.7 0.07 0.19 18 0.12
Channel catfish 4 UP 475 1,040 1 0.17 0.17
Largemouth bass 4 UP 279 344 <0.6 0.06 0.20
Largemouth bass 4 UP 279 314 <0.7 0.07 0.19
Largemouth bass 4 UP 267 256 <0.6 0.06 0.19
Largemouth bass 4 UP 282 284 <0.7 0.07 0.19
Largemouth bass 4 UP 257 230 <0.7 0.07 0.19
Largemouth bass 4 UP 267 276 <0.7 0.07 0.19
Largemouth bass 4 UP 291 355 <0.7 0.06 0.18
Largemouth bass 4 UP 314 508 <0.6 0.07 0.22
Largemouth bass 4 UP 305 391 <0.7 0.07 0.19
Largemouth bass 4 UP 267 291 0.4 0.08 0.19 11 0.07 0.03
Bluegill 3 DI 201 205 0.5 0.09 0.18
Bluegill 3 DI 177 116 <0.7 0.07 0.20
Bluegill 3 DI 169 100 <0.7 0.07 0.20
Bluegill 3 DI 171 95 <0.1 0.01 0.20
Bluegill 3 DI 190 138 <0.7 0.07 0.19
Bluegill 3 DI 171 110 0.9 0.18 0.20
Bluegill 3 DI 176 111 <0.7 0.07 0.20
Bluegill 3 DI 212 208 <0.7 0.06 0.18
Bluegill 3 DI 198 170 <0.8 0.07 0.18
Blue catfish 3 DI 784 5,425 1.1 0.18 0.16
Blue catfish 3 DI 665 2,900 <0.7 0.06 0.17
Blue catfish 3 DI 725 5,100 <0.7 0.05 0.15
Blue catfish 3 DI 645 2,800 0.4 0.07 0.17
Blue catfish 3 DI 548 1,600 <0.7 0.06 0.17
Blue catfish 3 DI 725 4,575 <0.7 0.07 0.19
Blue catfish 3 DI 624 2,700 <0.8 0.08 0.19
Blue catfish 3 DI 644 3,500 <0.8 0.08 0.19
Blue catfish 3 DI 647 3,125 1.6 0.30 0.19
Blue catfish 3 DI 627 3,000 1.1 0.19 0.17
Redear Sunfish 3 DI 219 192 0.7 0.13 0.18 20 0.08
Largemouth bass 4 DI 371 882 <0.7 0.07 0.21
Largemouth bass 4 DI 409 1,100 <0.8 0.08 0.21
Largemouth bass 4 DI 352 707 <0.7 0.07 0.21
Progress Energy Carolinas,Inc. 11 L.V.Sutton Electric Plant

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Fish Tissue Mercury Data,1999,2004-2010 NPDES Permit NC001422
Total Total Geometric
Total Total Mercury Mercury Dry-to- Mean Weighted
Trophic Length Weight (dry wt. (fresh wt. fresh wt. Mercury Average
Fish Species Level Station (mm) (g) pg/g) pg/g) ratio Count (mg/kg) (mg/kg)
Largemouth bass 4 DI 349 697 <0.7 0.08 0.22
Largemouth bass 4 DI 345 676 <0.7 0.08 0.22
Largemouth bass 4 DI 350 654 1.3 0.21 0.16
Largemouth bass 4 DI 356 652 <0.7 0.06 0.17
Largemouth bass 4 DI 308 438 <0.8 0.08 0.20
Largemouth bass 4 DI 395 960 <0.8 0.08 0.20
Largemouth bass 4 DI 336 526 <0.7 0.07 0.21 10 0.08 0.08
Blue catfish 3 DW 663 3,100 <0.7 0.06 0.16
Blue catfish 3 DW 645 2,800 <0.8 0.07 0.18
Blue catfish 3 DW 830 5,900 0.9 0.14 0.16
Blue catfish 3 DW 650 3,150 0.9 0.16 0.18
Blue catfish 3 DW 720 4,900 <0.8 0.08 0.19
Blue catfish 3 DW 652 2,850 <0.7 0.06 0.17
Blue catfish 3 OW 650 3,000 <0.7 0.06 0.18
Blue catfish 3 DW 887 10,500 1.2 0.22 0.18
Blue catfish 3 DW 678 3,800 <0.7 0.05 0.15
Blue catfish 3 DW 780 5,800 <0.8 0.06 0.15 10 0.08
Largemouth bass 4 DW 296 448 0.3 0.06 0.20 1 0.06 0.07
0.09
'Station locations:UP=Upstream of the effluent discharge, DI=Discharge area,and DW=Downstream.
2Weighted Average is developed consistent with Guidance for Implementing the January 2001 Methylmercury Water
Quality Criterion, April 2010,EPA 823-R-10-001.
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Progress Energy Carolinas,Inc. 12 L.V.Sutton Electric Plant