NCS000575_Renewal Application_20201104

f DUKE
ENERGY.
October 28, 2020
Suzanne McCoy
NCDEMLR Stormwater Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612
Antonio D. Price, PE
Plant General Mangei
Asheville Combined Cycle Station
Duke Energy Progress
ASVL PLT 1 46 Duke Energy Lane
Arden, NC 28704
o.828-650-0620
f 828-650-0701
[e-mail]
Subject: Asheville Steam Electric Station dba Asheville Combined Cycle Station
Industrial Stormwater Permit No. NCS000575
Permit Renewal Application
Dear Ms. McCoy:
Duke Energy Progress, LLC requests the subject permit be renewed and reissued. The subject permit
expires on April 30, 2021. Section III Part B of this permit requires the permit application for permit
renewal to be submitted at least 180 days prior to the expiration date of the permit. Attached are two
copies of the complete renewal application.
In the current permit there are several outfalls that it is requested to be removed from the permit for the
reasons as noted: a. SWO01 does not discharge and b. SW007, SWO08 and SW013 were never built.
Should you have questions or need additional information please contact Robert Wylie at 704-562-8258
or robert.wylie(cDduke-energy.com .
Sincerely,
Antonio D. Price, PE, General Manager Il
Asheville Combined Cycle Station
Enclosures:
RECEIVED
NOV 0 4 2020
DENR-LAND QUALITY
STORMWATER PERMITTING
Industrial Stormwater Permit NCS000575 Renewal Application
Tab 1 Renewal Application Form
Tab 2 Supplemental Information Required for Renewal of Individual NPDES Stormwater Permit
Tab 3 Site Maps
Tab 4 Summary of Analytical Monitoring
Tab 5 Summary of Visual Monitoring
Tab 6 Outfall Narrative and Summary of BMPs
Tab 7 Narrative of Facility Changes
Tab 8 Certification of the Development and Implementation of a Stormwater Pollution
Prevention Plan for the Permitted Facility
Tab 9 Fish Tissue Monitoring Results for the French Broad River 2017-2019
Cc: Robert Wylie
Teresa Williams
www. duke -energy. corm

DUKE
.� ENERGY.
Asheville Combined Cycle Station
Industrial Stormwater Permit NCS000575
Renewal Application
October 2020
Prepared by:
Anchor QEA of North Carolina, PLLC I _ ?,ANCHOR
231 Haywood Street �`V/,'�' QEA
Asheville. North Carolina

TABLE OF CONTENTS
1 RENEWAL APPLICATION FORM
2 SUPPLEMENTAL INFORMATION REQUIRED FOR
RENEWAL OF INDIVIDUAL NPDES STORMWATER
PERMIT
3 SITE MAPS
3.1 Overall Site Map
3.2 Back Haul Road Area
3.3 Combined Cycle Station Area
3.4 Landfill Area
4 SUMMARY OF ANALYTICAL MONITORING
5 SUMMARY OF VISUAL MONITORING
6 OUTFALL NARRATIVE AND SUMMARY OF BMPS
6.1 Back Haul Road Area
6.2 Combined Cycle Station Area
6.3 Landfill Area
7 NARRATIVE OF FACILITY CHANGES
7.1 Back Haul Road Area
7.2 South Haul Road to New Rockwood Road (Not Constructed)
7.3 Combined Cycle Station
7.4 Landfill Area
8 CERTIFICATION OF THE DEVELOPMENT AND
IMPLEMENTATION OF A STORMWATER POLLUTION
PREVENTION PLAN FOR THE PERMITTED FACILITY.
9 FISH TISSUE MONITORING REPORTS IN THE FRENCH
BROAD RIVER 2017 - 2019
h I 'age

I RENEWAL APPLICATION FORM

Permit Coverage
Renewal Application Form
National Pollutant Discharge Elimination System NPDES Permit Number
Stormwater Individual Permit NCS 00D575
Please provide your permit number in box in the upper right hand corner, complete the information in the space provided
below and return the completed renewal form along with the required supplemental information to the address indicated.
Owner Information
*- Address to which permit correspondence will be mailed
Owner / Organization Name:
Duke Energy Progress, LLC
Owner Contact:
Paul Drsovltch
Mailing Address:
526 Sculh Church Street
Charlotte, NC 28202
Phone Number:
980-373-0408
Fax Number:
E-mail address:
[e-mail]
Facility Information
Facility Name:
Asheville Steam Electric Station dba Asheville Combined Cycle Station
Facility Physical Address:
46 Duke Energy Lane
Arden, NC 28704
Facility Contact:
Antonio D. Price, PE
Mailing Address:
46 Duke Energy Lane
Al NC 26704
Phone Number:
828-650-0620
Fax Number:
828-650.0701
E-mail address:
[e-mail]
Permit Information
Permit Contact:
Robert Wylie
Mailing Address:
526 South Church Street
Charlotte, NC 282D2
Phone Number:
704 562-8258
Fax Number:
E-mail address:
[e-mail]
Discharge Information
Receiving Stream:
Lake Julian and French Broad River
Stream Class:
C and B
Basin:
French Broad
Sub -Basin:
Upper French Broad (04-03-02)
Number of Outfalls:
6
Facility/Activity Changes Please describe below any changes to your facility or activities since issuance of your permit. Attached a
separate sheet if necessary.
Facility/Activity Changes are summarized in the attached Industrial Stormwater Permit NCS000575 Renewal Application supplemental information document.
CERTIFICATION
I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief
such information is true, corn e and accurate.
Signature — Dates y ��
Antonio D. Price, P.E.
Print or type name of person signing above
Please return this completed application form
and requested supplemental information to:
Station General Manager II
Title
DEMLR - Stormwater Program
Dept. of Environmental Quality
1612 Mail Service Center
Raleigh, North Carolina 27699-1612

2 SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF
INDIVIDUAL NPDES STORMWATER PERMIT

`�` SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL
NPDES STORMWATER PERMIT
Two copies of each of the following shall accompany this submittal in order for the
application to be considered complete:
(Do = submit the site Stormwater Pollution Prevention Plan)
Initials
TLW
1. A current Site Map from the Stormwater Pollution Prevention Plan. The
location of industrial activities (including storage of materials, disposal
areas, process areas and loading and unloading areas), drainage
structures, drainage areas for each outfall, building locations and
impervious surfaces should be clearly noted. (Tab 3)
TLW 2. A summary of Analytical Monitoring results during the term of the
existing permit (if your permit required analytical sampling). Do not
submit individual lab reports. The summary can consist of a table
including such items as outfall number, parameters sampled, lab
results, date sampled, and storm event data. (Tab 4)
TLW 3. A summary of the Visual Monitoring results. Do not submit individual
monitoring reports. The summary can consist of a table including such
items as outfall number, parameters surveyed, observations, and date
monitoring conducted. (Tab 5)
TLW 4. A summary of the Best Management Practices utilized at the permitted
facility.
Summary should consist of a short narrative description of each BMP's
in place at the facility. If the implementation of any BMP's is planned,
please include information on these BMP's. (Tab 6)
TLW 5. A short narrative describing any significant changes in industrial
activities at the permitted facility. Significant changes could include the
addition or deletion of work processes, changes in material handling
practices, changes in material storage practices, and/or changes in the
raw materials used by the facility. (Tab 7)
TLW 6. Certification of the development and implementation of a Stormwater
Pollution Prevention Plan for the permitted facility (Sign and return
attached form). (Tab 8)
If the final year analytical monitoring of the existing permit term has not been completed
prior to filing the renewal submittal, then the last years monitoring results should be
submitted within 30 days of receipt of the laboratory reports. (i.e. do not withhold renewal
submittal waiting on lab results)

3 SITE MAPS
3.1 OVERALL SITE MAP
3.2 BACK HAUL ROAD AREA
3.3 COMBINED CYCLE STATION AREA
3.4 LANDFILL AREA

'. Structural Legend
SWO12 1 Power Block 1
r f` 2 Power Block 2
Lake Julian 3 Unit 6 Cooling Tower
4 Unit 8 Cooling Tower
5 Water Treatment Building
Swo11 6 Administrative Building__
NPDES 7 Warehouse
Outfa11001 - —
� : - � 8 La down Yard
_ Y -. -
s vn
9 Unit 5 and 6 Transmission Switchya
10 Unit 7 and 8 Transmission_Switchya
11 1,250,000 gallon fuel oil storage to
5It"ri'ir. 12 1,804,000 gallon fuel oil storage to
�ramag® Future
Arean _ . 1,804,000 gallon fuel oil storage to
Landfill 13 9 9
14 Former Coal Pile -- —
15 '64 Ash Basin
11 . rrrr •,..,,,•� zs 16 Lined Retention Basin
.,¢� ,��,.,. f' , •g 17 NPDES Water Treatment System
OF
-- _ .are.• , A, .. 18 Outfall 001 Stilling Pond
swot2 2019 Landfill Leachate Collection Tank
' -... -cam - ._ _
19 18 ®Drainage Distribution ; �� - " V Switchyard
.. f
20 FG k
— Area ` i, $witch`yard, �' ? Coal Unit 1 �+ j' 25 �7 21 FGD Scrubber Demolition Area
. +
nit�2 22 Coal Unit Y ---
Unit 2 Demolition
OAA,a,•r., .. em liti rea • v' , 23 CT Unit 3
AR,., "--�. `, 24 CT Unit 4
25 CT Demineralized Water Storage Tank
17
ti • a. - -
•Y , •� � - 2t •i i 26 Laydown Yard _
� r ` % NPDES i 27 CT Warehouse
16 + 14 j Outfall0o2 28 Intake
.
iI A
� ,+ � 29 Former Once -Through Cooling Wat I
30 Oil/Water Separator
{
r z "
1. 2
..
'a+f i0•.� cn: ;�.� ._._._.__.�.- _ - is
� u
...._... : .-.•tom• _
_
ta_ ,sip
'MIT r
NPDES NPDES
gJ10 }�i
outfall 101 Outfall
1B is
00 , l r
'.ice -. k.T Lfi? 3
2 1
�4ro NPDES SW,O..Ovc. ,
Outfall rai�a9e'
001 D Are., ' t
20
v osaw--
,mp i x! • 4 r:.yAr " ' 7 1 ' ! ,'y ' „rm: k - Drain. .:, N
SW003 m ,d
P�, i t' r SW009 B 1k
a a•� "� '�� Draisiae,�'_a " Area - m DB i
Publish Date: 2020/10/26, 1:55 PM I User: alesueur
Filepath: \\orcas\gis\Jobs\Duke_Energy_1290\Asheville-Plant\Maps\2020_10_SW_Perm
m
s� .+ e•� ATj
_SiteMap.mxd
66CDB .d M

Former Stormwater Outfall SWO01
Lake Julian
9tZ tr9tz tr9tZ
------------ 991691a
991,7
` 8
91e
�77
10
as *a IVA as an an
\_
�..\
_
i
ZZ
i$1'L—----------esl
\ ,
troaa
R I /
SOURCE: Drawings provided by Jacobs Engineering dated May 18, 2000
and Chicago Bridge & Iron Company (CB&I) dated April 21, 2017.
HORIZONTAL DATUM: North Carolina State Plane, North American
Datum of 1983 (NAD83), U.S. Survey Feet
VERTICAL DATUM: North American Vertical Datum of 1988 (NAVD88)
�- s61Z 6tZ
ro
\ -V x �L1z
�N
Vie
Detention Basin
_
Z6lZ —
q fto ♦
to tozz so
00 to
— oh
N59,
� \ \ VO4
NOTE: See stormwater Best Management Practices (BMP) described in the
Stormwater Permit Renewal Application.
Publish Date: 2020/10/23 4:23 PM I User: dholmer
Filepath: K:\Projects\1290-Duke Energy\Duke - SPPP Update\1290-SPRA-001.dwg Figure 2
ANCHOR
QEA
LEGEND:
i
219
2.196 Z
Topography (2' Interval)
Drainage Area Boundary
Drainage Flow Direction
Property Line
Surface Water
BMPs (e.g. Wattles and FlocTI SOCS)
too9000
Stormwater Outfall SWOM
21g4
2182
Detention Basin -
x
r6t
2198
80ZZ
DRAINAGE AREA W003:
Total Drainage Are : 8.92 acres
Impervious Draina a Area: 1.42 acres
217A

1-3
=In
/^ J
/-2160.\
Lil
_ _ r
---- \\\
Ij,. t
MH-A9 MH-A4 MH-A3 [V1'
_L2 MIi-D4 M 51\ \ \+--// ��` \ \ !� • \ 1 Hsi
MD7}1H-Ps
w AH-A %
IL I
..SWO09 Drainage
rainage Area
-�; MH-A8 MH-A, MHDa
/ I . MI -'-As
MH D I IMH-109A
MH-A10 �
\ s R r II I R�
% ~ I� L > MH-D$
M
SW010Draina Drainage / / // /, I '.;I MH3 I
g / , / / I I II I Hc2 tI II l
1 � s�
Julian
I
MH B4 :-D'13 r:� —» MH
I II « MH 4 _ I I �fI iri-D14 I V / / / / t � O \
lmgcS�r MH-05�-- ®ew.. 1 {l6iT--- M"-D1ii /// j//
I, MH BF /I /� \
,MH-CP7 MH-CP6 w �e ' Mf#�D1$
4'1II\ MH-B$ /° MH- 9 / ° , ° / ,° / \
I� H-Cd151 \ . MH-C6 / r_ /
22
IMH-IP16, ` JQ C� !\ �R' MH,B10 /� �-- ; /< H-D21 /.
MH D:.341*1
46
\\ ♦ C / / ( I / MH-CP10 \\ \+�— — -D24 �� / / / I / /
�b \ MH-CP170 >' \ 2120------
\\\ \\ LEGEND:
— — — — — — — — Topography (10' Interval)
\ 1
<\ \ \'-------- Drainage Area Boundary
Drainage Flow Direction
\ — — Pj-operty Line
- Surface Water
Wetland Boundary
o IAH-U l u
Stormwater Drop Inlet
» Stormwater Drain Line
M ■ N BIAPs (e.g. Check Dams and
FlocTM Socs)
DRAINAGE AREA SWO09:
Total Drainage Area: 61.24 acres
Impervious Drainage Area: 12 acres
DRAINAGE ARE A SW010:
Total Drainage Area: 31.01 acres
Impervious Drainage Area: 25 acres
\ SOURCE: Drawings provided by VEETech, P.C., and
Catlin Engineers and ,scientists dated December 3,
a 2019.
I HORIZONTAL DATUM: North Carolina State Plane,
I North American Datum of 1983 (NAD83), U.S. Survey
... I f
I I Feet
(/ VERTICAL DATUM: North American Vertical Datum
f of 1988 (NAVD88)
NOTE: See stormwatE!r Best Management Practices
(BMP) described in the Stormwater Permit Renewal
\� \ \\ \\ 2150 I // //� �/ L �, `q, \\ \� * \ \ SX \ �\ ♦�,' ��� J�-i W —\ ! \\ 1 Application.
j as
\ / r .01
w • \ i / __ram \ '�" I \+�—Y ++ �/ i N. /'Je
S1 \ate,. s+ / / / ` e —•� \—� �,_ _'
Publish Date: 2020/10/23 4:23 PM User: dholmer
Filepath: K:\Projects\1290-Duke Energy\Duke - SPPP Update\1290-SPRA-002.dwq Fiqure 3
\ \\ \ / vie / / MH-CP11 � ' + ( \ t �� / %, \\ I
N, \�° // �IV
MH-CP1 ; , `+ \H D2&+\ \\ \\ �j
\ + — Stormwater Outfall SW010 / \ MH-CP12 + H7V-OFOEB1i— _ \ \\ .\\ \\ N.
OQ, 'ol ! i /° Stormwater Collection BasinIN\
HW-OF-C++
Stormwater Outfall SWO09 \ `N� /' " // / \ . I
/ / /
loe
Stormwater Collection Basin �� oll
§ ♦ ° — I j \`
ANCHOR
QEA
0 300
Feet
Figure 3
Combined Cycle Station Area Map
Stormwater Permit Renewal Application
Duke Energy Asheville Steam Electric Plant

'/err—.,°�, v•`--3� 1 I e{ ! � l r ) f j 1 1 } I 1 t \ ( 1 \\ \ �� \�` ` \`�� \ �,\ �\.,,1'"_` `'� i\ `�°. \��—_�. \
r�� `� ` _ \ Stormwater Collection Basin
\_..Y...//�////�..r,\�` \ .."'`•\�'1 1 \ '` ... �. \ .` \ `\ \ yY r^\ \\ \ \ ... .... .... ..
\ _ r w r Cy �j J\
vim- \\ tiw --_ -a - ` ? 1''•i. �\ t\ �/Z yJ } �! �w \ ', ' ` ��\ ��! \ & a.... J...."' i\
\ ®\ .
,�°� T1�
`°'�" ti a „- _tee. `�..r — +� ` � J�I •✓• •� !n O � I � r-+' s- ^� - r i r ./'� r� -' ��<r � �' - f 3� ..- / • ^ �.. '�„ 'di. 1 l / / l I . \ '.
' ' —' , Stormwater Outfall SW012 ! - =' �;-r/
\ • a` J \ / r / J , -_� r sa. w ✓ r —, h !� ! I I , ! E- rcr
\\ .
-,�—F/ ! ) I I
Stormwater0utfall SW011 1 l
`^`\ \\\\\\ \yW"..%L j. r� :: 'ram /J 4 J \ll I I I 1 / �•- \` \ \\ t tF \) t) t ! ®\\
•`� \; \ \�\\ -'\ �.9'r' i..:�y ^'\`^1 - �. a _� /�;./f ! .f. ,.I � _ � ¢ ,. � -\\ \\ \\\\\\... _i�L '�r./ !•( i�•. '. �.`.. r;/ I `\�... i
�\
� \ `\ \\\\ \ \\\1\\\ •-�—��//.� 60 moo:- // /✓ , / / I \®\ \\\ I 1 ( 1 r° \i!, ,\ ,'.
/�n ��� .,/ /' Stormwater Collection
rt/ `' SW012 Drainage Area / / e'//' ®a ®� /// /®OV / ��, I \\\\ \\ \\ \\
°� \ `\ , \� ,'' / %'� /' /� // /°` I \ \\ \ \ \ , ,t r' SW011 Drains
\ \ \
ri I � I 1 tt 111
Landfill Footprint
( \ ! x \ \ \ \ (Non -Contributing Area)
\ tl Proposed SW013, Not
Constructed. Haul Road
t\ Directed to SW012 `\\ `
FF l EF \i
\ \\ \ \ \ I ) \ \ \ \ \ I Perimeter Access Road
\ ( \ \ \ \ I 1 l 1I!
I'._ .----.----_— .__.—®
t' --------------------�' / ve-A
le
=''� � � �� �_ �-,.�.,. "`"'-----• Maintenance Roads
OHE
/ �' F F / (3�iE ----} or+E
/�-- 12" or 18" Pie /� .... , . ) F F F o ❑
1 \\1 , t t1 `�•,7� ^.,� ��1 1\I11 / ' /� r"/®�-- p ,--ij f ♦, �,1.� ��.�i � »- -F E ,,/ ,.... �I
Haul Road
— _�— ®--- �S , '`ems * — L f1
NO
Sediment Basin __ F E \ ,
Temporary Diversion
1 cA�� 't SW012 Drainage Area tV\, =� — — — �VV
1 t\ 44 \\ \ \\\t \ ®\ �__ ��-__---, / / % t� ,, �� � �.»y`1 �j�,\ .If I► I ! jlf / �\ �`'"t � �
Publish Date: 2020/10/23 4:23 PM I User: dholmer
Filepath: K:\Projects\l290-Duke Energy\Duke - SPPP Update\1290-SPRA-003.dwg Figure 4
ANCHOR
QEA

4 SUMMARY OF ANALYTICAL MONITORING

l
SWO03 - Analytical Monitoring Results
Sample
Freq.
Quarter)
SDOMR Parameter
Code:
01097
01002
01012
01022
01027
01034
01042 '-
: 01051
01067
01147
01077
01059
01092
71900
00530
00400
Benchmark values (mg/L):
0.09
0.34
0.065 ."
; N/A
0.003
0.9
0.010
'0.075
0.335
0.056 ' '
` 0.0003
N/A
0.126
N/A
100
6-9
Monitoring
Period
Sample
Date
Total
Rainfall
Total
Antimony
Total
Arsenic
Total
Beryllium
Total
Boron
Total
Cadmium
Total
Chromium
Total
Copper
Total
Lead
Total
Nickel
Total
Selenium
Total
Silver
Total
Thalllum
Total
Zinc
Total
I Mercury
TSS
pH
inches
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ng/L
mg/L
S.U.
Y1P1/1/Q1
No Flow
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Y1P1/l/Q2
No Flow
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Y1P2/2/Ql
03/10/17
0.24
<0.005
<0.01
<0.001
<0.05
<0.001
<0.005
<0.005
<0.005
<0.005
<0.01
<0.005
<0.001
0.012
5.78
5.6
6.4
Y1P2/2/Q2
No Flow
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Y2P3/3/Ql
08/31/17
1.24
<0.005
<0.01
0.000171
<0.05
<0.001
<0.005
0.007
<0.005
0.00281
<0.01
<0.0005
0.0000971
0.030
2.90
31.4
7.1
Y2P1/3/Q2
No Flow
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Y2P2/4/Q1
01/11/18
2.10
<0.001
<0.001
<0.001
<0.05
<0.001
0.00120
0.00378
<0.001
0,00130
<0.001
<0.0003
<0.0002
0.014
8.80
32
6.5
Y2P2/4/Q2
04/23/18
0.71
<0.001
0.0044
<0.001
<0.05
<0.001
0.0069
0.010
0.0036
0.0049
<0.001
<0.0003
<0.0002
0.068
13.10
87
7.4
Y3P1/5/Ql*
09/26/18
0.64
<0.001
0.00332
<0.001
<0.05
<0.001
0.00846
0.010
0.00390
0.005S9
<0.001
<0.0002
<0.0002
1 0.103
9.77
200
6.4
Y3P1/5/Q2*
10/26/18
1.63
<0.001
<0.001
<0.001
<0.05
<0.001
<0.001
0.00431
<0.001
0.00125
<0.001
<0.0002
<0.0002
0.012
8.77
18
6.8
Y3P1/5/Q2*
11/09/18
0.45
<0.001
<0.001
<0.001
<0.05
<0.001
<0.001
0.0587
<0.001
<0.001
<0.001
<0.0002
<0.0002
0.012
4.28
7.8
7.2
Y3P1/5/Q2*
12/20/18
1.06
<0.001
0.00392
<0.001
<0.05
<0.001
0.00492
0.00997
0.00307
0.00340
<0.001
<0.0002
<0.0002
0.051
14.2
86
7.2
Y3P2/6/Q1*
No Flow
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Y3P2/6/Q2*
04/05/19
0.31
<0.001
0.DO129
<0.001
<0.05
<0.001
0.00116
0.00578
<0.001
<0.001
<0.001
<0.0002
<0.0002
0.014
8.15
21
7.1
Y3P2/6/Q2*
06/07/19
1.11
<0.001
I <0.001
<0.001
1 <0.05
<0.001
<0.001
0.00970
<0.001
0.00137
<0.001
<0.0002
<0.0002
0.008
8.20
12
7.2
Y4P1/7/Ql
No Flow
-
-
I -
-
-
-
-
-
-
-
I -
-
-
-
-
-
-
Y4P1/7/Q2
10/30/19
1.52
<0.001
0.00125
<0.001
<0.05
<0.001
<0.001
0.00306
<0.001
0.00110
<0.001
<0.0002
<0.0002
0.020
8.08
9
6.8
Y4P2/8/Ql
03/23/20
O.SO
<0.001
0.00147
<0.001
<0.05
<0.001
0.00247
0.00434
0.00167
0.00213
<0.001
<0.0002
0.000491
0.033
7.28
24
6.95
Y4P2/8/Q2
04/23/20
1.01
<0.001
<0.001
<0.001
<0.05
1 <0.001
<0.001
0.00754
<0.001
0.00163
<0.001
<0.0002
<0.0002
0.013
9.64
5.8
6.84
Y5P1/9/Ql
09/29/20
0.92
<0.001
<0.001
<0.001
<0.05
<0.001
0.00178
0.005
0.00107
0.0023
<0.001
<0.0002
<0.0002
0.015
8.43
12
6.85
YSP1/9/Q2
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
YSP2/10/Q1
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
I TBD
I TBD
I TBD
TBD
I TBD
TBD
TBD
Notes:
*Tiered Sampling (Tier One):
• TSS 09/26/18 - 12/20/18
• Copper 11/09/18 - 06/07/19
1. Monitoring Period = Yea r#Period#/Sample#/Quarter#
2. TBD = to be determined (results not available)
3. TSS = total suspended solids
4. 3 = Laboratory data qualifier indicating estimated concentration above the laboratory method detection limit and below the laboratory reporting limit.

SWO02
No Flow for all periods; removed from permit May 3, 2017.
SWo01
No Flow for all periods; requesting removal.
SWO07 and SW008
Never constructed, requesting removal.
SWO13
Never constructed, requesting removal.

r"1"\
5 SUMMARY OF VISUAL MONITORING
14�

Summary of Visual (Qualitative) Monitoring
Visual (qualitative) results descriptions:
• Clarity = 1 through 5, where 1 is clear and 5 is very cloudy.
• Floating Solids = 1 through 5, where 1 is no solids and 5 is the surface covered with floating solids.
• Suspended Solids = 1 through 5, where 1 is no solids and 5 is extremely muddy.
SW003 - Visual (Qualitative) Monitoring Results
Date
Rainfall
Color
Odor
Clarity
Floating
Solids
Suspended
Solids
Visible
106am
Oil Sheen
Indication of
Erosion
Comments
11/29/16
0.70
Clear
None
1
1
1
No
No
No
None
03/10/17
0.24
Clear
None
1
1
1
No
No
No
None
06/30/17
0.00
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
No measurable storm
events during
operational hours for
this monitoring period
08/31/17
1.24
Clear
None
1
1
1
No
No
No
None
10/23/17
3.33
Clear
None
1
1
1
No
No
No
None
01/11/18
2.10
Light brown
None
2
2
2
No
No
No
None
04/23/18
0.71
Light brown
None
2
1
2
No
No
No
None
09/26/18
0.64
Light brown
None
3
1
2
No
No
No
None
10/26/18
1.63
Light brown
None
2
1
2
No
No
No
None
11/09/18
0.45
Light brown
None
2
1
2
No
No
No
None
12/20/18
1.06
Light brown
None
3
1
2
No
No
No
None
02/22/19
0.78
Light brown
None
2
1
2
No
No
No
None
04/05/19
0.31
Light brown
None
1 2
1
2
No
No
No
None
06/07/19
1.11
Light brown
None
2
1
2
No
No
No
None
10/30/19
1.52
Light brown
None
2
1
2
No
No
No
None
03/23/20
0.50
Light brown
None
2
1
1
No
No
No
None
04/23/20
1.01
Light brown
None
2
1
1
1 No
No
No
None
09/29/20
0.92
Light brown
None
2
1
2
1 No
No
No
None
Notes:
1. N/A indicates not applicable (i.e. no stormwater discharge).

SW001 - Visual (Qualitative) Monitoring Results
Floating
Suspended
Visible
Indication of
Date
Rainfall
Color
Odor
Clarity
Solids
Solids
Foam
Oil Sheen
Erosion
Comments
Light red
11/29/16
0.70
(natural clay)
None
2
1
2
No
No
No
No discharge
03/10/17
0.24
N/A
None
N/A
N/A
N/A
No
No
No
No discharge
No measurable storm
events during
operational hours for
06/30/17
0.00
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
this monitoring period
Ponding at the
pipe light brown
from
08/31/17
1.24
surrounding soil
None
2
1
2
No
No
No
No discharge
Ponding at the
pipe vegetation
overgrown slight
Ponding at pipe,
turbidity from
discernable discharge
10/23/17
3.33
surrounding soil
None
2
1
2
No
No
No
path not evident
Very small amount of
ponding at pipe, but no
01/11/18
2.10
Very light brown
None
2
1
2
No
No
No
discharge to lake
Very small amount of
ponding at pipe, but no
04/23/18
0.71
Very light brown
None
2
1
2
No
No
No
discharge to lake
Very small amount of
ponding at pipe, but no
09/26/18
0.64
Very light brown
None
2
1
2
No
No
No
discharge to lake
Very small amount of
ponding at pipe, but no
10/26/18
1.63
Very light brown
None
2
1
2
No
No
No
discharge to lake
No water ponding at
pipe observed and no
11/09/18
0.45
N/A
None
N/A
N/A
N/A
No
No
No
discharge to lake
Very small amount of
ponding at pipe, but no
12/20/18
1.06
Very light brown
None
2
1
2
No
No
No
discharge to lake

Floating
Suspended
Visible
Indication of
Date
Rainfall
Color
Odor
Clarity
Solids
Solids
Foam
Oil Sheen
Erosion
Comments
Very small amount of
ponding at pipe, but no
02/22/19
0.78
Very light brown
None
2
1
2
No
No
No
discharge to lake
No water ponding at
pipe observed and no
04/05/19
0.31
N/A
None
N/A
N/A
N/A
No
No
No
discharge to lake
No water ponding at
pipe observed and no
06/07/19
1.11
N/A
None
N/A
N/A
N/A
No
No
No
discharge to lake
Very small amount of
ponding at pipe, but no
10/30/19
1.52
Very light brown
None
2
1
2
No
No
No
discharge to lake
Small amount of
ponding at pipe, but no
03/23/20
0.50
Very light brown
None
2
1
1
No
No
No
discharge to lake
04/23/20*
1.01
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
No discharge
09/29/20*
0.92
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
No discharge
Notes:
1. N/A indicates not applicable (i.e. no stormwater discharge).
2. SW001 visual (qualitative) monitoring results are associated with ponding observed at the end of a pipe culvert, near the edge of Lake Julian (SW001), and
are not associated with observations of an actual discharge from SW001. There was no actual discharge from SW001 during the stormwater permit
monitoring period.
3. *The stormwater outfall SW001 drainage and discharge area was modified in April 2020 to where no industrial stormwater runoff flowed to or discharged
from SW001. See Tab 7 for a short narrative describing changes to the SW001 drainage area made in 2020.

&1
6 OUTFALL NARRATIVE AND SUMMARY OF BMPs
6.1 BACK HAUL ROAD AREA
OUTFALL ID: SWO03
Discharge Structure: Concrete piping and riprap-lined ditch to Lake Julian
Location: Back Haul Road
Drainage Area: 8.92 acres
Percent Impervious: 15.92%
BMP Summary for SWO03 Drainage Area
INDUSTRIAL ACTIVITIES
POTENTIAL
BMP SUMMARY
AND DESCRIPTION
POLLUTANTS
Material Handling (ash)
Fugitive dust settling in
Dust suppression with
drainage area
water/polymer
Good housekeeping
Residue Hauling Vehicles
Tracking of coal
Covering trucks
combustion residuals
Truck wash
(CCR) products onto
Manually spraying tires and
roadway drainage area
checking trucks before leaving site
Street sweeping
Leaking of petroleum from
Petroleum into
Security inspecting trucks for
deliver haul truck
stormwater outfalls
leaks reporting any drips ors ills
Erosion caused by truck
Sediment into
Preventative maintenance on
traffic or weather
stormwater
shoulders, erosion wattles,
matting,and floc socs.
Landscape and herbicide
Sediment into
Cut grasses at higher level to
management
stormwater
encourage healthy growth.
Prohibit use of herbicides in
stormwater areas to prevent
erosion from lack of vegetation.

,,010\
OUTFALL ID: SW001
Discharge Structure: Not applicable
Location: Back Haul Road
Drainage Area: Not applicable
Percent Impervious: Not applicable
Stormwater discharge outfall SWO01 no longer receives industrial stormwater runoff. See
Tab 7 for a short narrative describing changes to the SWO01 drainage area made in 2020.
BMP Summary for SWO01 Drainage Area
INDUSTRIAL ACTIVITIES
AND DESCRIPTION
POTENTIAL
POLLUTANTS
BMP SUMMARY
Not applicable
Not applicable
Not applicable
,IAQI�

Gma
6.2 COMBINED CYCLE STATION AREA
OUTFALL ID: SWO09
Stormwater detention basin discharging through a corrugated
metal pipe (CMP) to a wetland area that discharges to the
Discharge Structure: French Broad River.
Location: Combined Cycle Station area
Drainage Area: 61.24 acres
Percent Impervious: 19.60%
OUTFALL ID: SW010
Stormwater detention basin discharging through a CMP to a
Discharge Structure: wetland area that discharges to the French Broad River.
Location: Combined Cycle Station area
Drainage Area: 31.01 acres
Percent Impervious: 80.62%
Planned BMP Summary for Combined Cycle Station Drainage Areas (Outfalls
SWO09 and SW010)
INDUSTRIAL ACTIVITIES
POTENTIAL
BMP SUMMARY
AND DESCRIPTION
POLLUTANTS
Leaking of petroleum from
Petroleum into
Security inspecting trucks for
delivery trucks
stormwater outfalls
leaks reporting any drips ors ills
Fuel oil unloading areas
Petroleum into
Confine unloading activities to
stormwater outfalls
designated areas outside drainage
pathways
Use containment curbs in
unloading areas
Use spill protection (e.g. drip pans
or buckets) beneath unloading
connections
Implement SPCC Plan and FRP
Chemical loading/unloading
Chemical into
Utilize secondary containment
areas
stormwater outfalls
structures and sumps for chemical
unloading operations
Use spill protection (e.g. drip pans
or buckets) beneath unloading
connections
Implement chemical unloading
procedures, where necessary

INDUSTRIAL ACTIVITIES
POTENTIAL
BMP SUMMARY
AND DESCRIPTION
POLLUTANTS
Liquid storage tanks
Chemical into
Cover chemical storage areas,
stormwater outfalls
where necessary
Provide secondary containment
around chemical storage areas
Utilize manually activated
containment drain valves, where
necessary
Maintain inventory of in -process
chemical containers
Utilize in -process liquid storage
tank level indicators, where
available
Oil bearing equipment
Petroleum into
Power Block 1 and 2 transmission
switchyards
stormwater outfalls
switchyards are constructed with
level grades and gravel surfaces
Secondary containment provided
for transformers
Erosion caused by truck
Sediment into
Preventative maintenance on
traffic or weather
stormwater
shoulders, erosion wattles, matting
and floc socs.
Landscape and herbicide
Sediment into
Cut grasses at higher level to
management
stormwater
encourage healthy growth.
Prohibit use of herbicides in
stormwater areas to prevent
erosion from lack of vegetation.
Groundwater flow
Low pH water
Bottom of SW009 and SWO10
contribution
stormwater collection basins lined
with limestone (#57 stone and
riprap)
Limestone riprap and floc socs
utilized in SW009 drainage area
ditches
i10%\

6.3 LANDFILL AREA
OUTFALL ID: SW011
Stormwater detention basin discharging into an energy
Discharge Structure: dissipator with ultimate discharge to the French Broad River.
Location: CCR landfill area
Drainage Area: 2.70 acres
Percent Impervious: 59.63%
OUTFALL ID: SWO12
Stormwater detention basin discharging into an energy
Discharge Structure: dissipator with ultimate discharge to the French Broad River.
Location: CCR landfill area
Drainage Area: 6.14 acres
/aob\ Percent Impervious: 49.35%
OUTFALL ID: SW013*
Discharge Structure: Not applicable
Location: Not applicable
Drainage Area: Not applicable
Percent Impervious: Not applicable
*Stormwater discharge outfall SW013 will not be constructed. Industrial stormwater
drainage from the CCR landfill haul road (permitted as SW013) will be incorporated in the
SW012 drainage area during landfill construction. See Tab 7 for a short narrative describing
the incorporation of the CCR landfill haul road drainage in the SW012 drainage area. This
outfall number is requested to be removed from the permit.

Planned BMP Summary for CCR Landfill Drainage Areas (Outfalls SWO11
and SW012)
INDUSTRIAL ACTIVITIES
POTENTIAL
BMP SUMMARY
AND DESCRIPTION
POLLUTANTS
Material Handling (ash)
Fugitive dust settling in
Dust suppression with
drainage area
water/polymer
Good Housekeeping
Residue Hauling Vehicles
Tracking of CCR products
Covering Trucks
onto landfill access
Truck Wash
roadway drainage areas
Manually spraying tires and
checking trucks before leaving '64
ash basin
Street sweeping
Stormwater diversion curbs along
the CCR landfill haul road to direct
industrial stormwater runoff from
the road to SWO12
Leaking of petroleum from
Petroleum into
Waste handling personnel
haul truck
stormwater outfalls
inspecting trucks for leaks,
reporting any drips ors ills
Erosion caused by truck
Sediment into
Preventative maintenance on
traffic or weather
stormwater
access road shoulders and
diversion berms, check dams,
erosion wattles, matting,
stormwater detention pond
foreba s and baffles
Landscape and Herbicide
Sediment into
Cut grasses at higher level to
management
stormwater
encourage healthy growth.
Prohibit use of herbicides in
stormwater areas to prevent
erosion from lack of vegetation

7 NARRATIVE OF FACILITY CHANGES
7.1 BACK HAUL ROAD AREA
In April 2020, the stormwater outfall SWO01 drainage and discharge area was
modified to support coal-fired Unit 1 and Unit 2 decommissioning and Duke Energy
Coal Combustion Product (CCP) project activities. The modifications removed the
coal storage railroad tracks (raw material storage area) from the SWO01 drainage
area and eliminated industrial stormwater drainage from the former coal storage
railroad tracks to SWO01. The modifications included:
• Removal of the former coal storage railroad tracks, immediately adjacent to
SWO01 to the west
• Construction of a grass -covered berm in the location of the former coal
storage railroad tracks, between the back haul road and Lake Julian
• Construction of drainage features including a culvert pipe, drainage swales,
and sediment basins to drain the grass -covered berm area of stormwater not
associated with industrial activities
On September 8, 2020, an asphalt curb was installed along the back haul road to
divert the former SW001 drainage area industrial stormwater runoff associated with
the road to the SWO03 drainage area. Approximately 0.16 acres of former SWO01
impervious drainage area (back haul road) was diverted to SW003.
'anll� There is no industrial activity within or industrial stormwater drainage to the former
SWO01. Duke Energy therefore requests the removal of stormwater outfall SWO01
from Industrial Stormwater Permit No. NCS000575.
7.2 SOUTH HAUL ROAD TO NEW ROCKWOOD ROAD (NOT
CONSTRUCTED)
Stormwater outfalls SW-7 and SW-8 were never constructed but are included in the
current Industrial Stormwater Permit No. NCS000575. Stormwater outfalls SW-7
and SW-8 were permitted in the existing Industrial Stormwater Permit for the
formerly proposed south haul road to New Rockwood Road.
Duke Energy no longer plans to construct the south haul road to New Rockwood
Road or the currently permitted stormwater outfalls SW-7 or SW-8.
Duke Energy therefore requests the removal of stormwater outfalls SW-7 and SW-8
from Industrial Stormwater Permit No. NCS000575.
7.3 COMBINED CYCLE STATION
Construction of the Asheville Combined Cycle Station was completed in 2020, and
the Combined Cycle Station began operations in January 2020. Two new stormwater
outfalls (SW009 and SW010) associated with the Combined Cycle Station were
,.NNN included in the January 29, 2020 Permit Modification Request letter submitted to the
North Carolina Department of Environmental Quality (DEQ).
The Asheville Steam Electric Plant coal-fired Unit 1 and Unit 2 were retired in
January 2020.

At the Asheville Combined Cycle Station, the stormwater within the powerhouse and
water treatment building process areas (e.g. turbine building drains, transformer
containments, water treatment chemical unloading drains, etc.) gets collected and
sent to a wastewater collection sump which discharges to a National Pollutant
Discharge Elimination System (NPDES) wastewater permitted outfall.
Stormwater collected in the transformer containments is sent to the wastewater
sump through turbine building drain tanks, then to an oil/water separator and
discharges through an NPDES wastewater permitted outfall.
The water treatment chemical unloading containment drains directly to the
wastewater collection sump and has downspouts feeding the containment from
water treatment roof drains.
All bulk storage containers and switchyard transformers located within the SWO09
and SW010 drainage areas are provided with some means of passive secondary
containment to prevent a release of materials to stormwater outfalls. Drum and
waste container storage areas are located within covered areas of the powerhouse
and water treatment buildings that drain to NPDES permitted wastewater outfalls,
and have containment curbs, or other secondary containment measures. Combined
Cycle Station chemical product unloading activities in the powerhouse and water
treatment building are performed in locations equipped with sumps or secondary
/Awll-� containment measures to prevent release of material to stormwater drains.
All exterior stormwater drains adjacent to the station's powerhouse flow into two
stormwater collection basins and discharge through stormwater outfalls SWO09 and
SW010 to a wetland area and then to the French Broad River.
Stormwater outfall SWO09 discharge is from the collection basin referred to as the
East Stormwater Collection Basin.
Stormwater outfall SW010 discharge is from the collection basin referred to as the
West Stormwater Collection Basin.
Stormwater outfall SWO09 and SWO10 descriptions, drainage area information, and
planned BMPs are summarized in Tab 6 of this permit renewal application.
7.4 LANDFILL AREA
Construction of an industrial landfill for the disposal of CCR from an on -site ash
basin began in 2020 and is ongoing. Construction of the landfill is scheduled to be
completed by January 2021, and the landfill and associated stormwater drainage
areas are scheduled to begin operation in mid -January 2021. The landfill is
scheduled to be closed in 2023.
Two new stormwater outfalls (SW011 and SW012) associated with the CCR landfill
were included in the January 29, 2020 Permit Modification Request letter submitted
?1MW_1 to DEQ.
Based on an August 14, 2020 facility stormwater inspection performed by DEQ,
stormwater outfall SWO13 was added to the draft 2020 Industrial Stormwater Permit

No. NCS000575 modification to incorporate industrial stormwater runoff associated
with the CCR landfill haul road drainage area. Based on facility activity and grading
constraints, the draft -permitted stormwater outfall SWO13 drainage area has been
designed to instead drain industrial stormwater runoff from the CCR landfill haul
road drainage area to stormwater outfall SWO12. Therefore, stormwater outfall
SWO13 will not be constructed as the industrial stormwater from the CCR landfill
haul road drainage area will be included in the SWO12 drainage area and will
discharge through SWO12.
Duke Energy therefore requests the removal of stormwater outfall SWO13 from
Industrial Stormwater Permit No. NCS000575.
The stormwater that falls directly on the landfill will be collected in chimney drains
and processed as leachate which will be discharged under an industrial wastewater
pretreatment permit. Stormwater that falls on the landfill's access roads and the
landfill haul road will flow into trenches that drain into two stormwater collection
basins. These two stormwater collection basin outfalls are identified as stormwater
outfalls SWO11 and SWO12.
Duke Energy has no plans to treat, store, or dispose of significant materials on the
CCR landfill access roads, haul road, or on immediately surrounding areas adjacent
to the landfill in the future. No materials loading or unloading activities will take
place on the access roads, haul road, or on immediately surrounding areas. No
hazardous waste treatment, storage, or disposal will occur in the SWO11 or SWO12
drainage areas. CCR landfill activities will be in compliance with solid waste
management permit 1119-INDUS-2020.
Stormwater outfall SWO11 and SWO12 descriptions, drainage area information, and
planned BMPs are summarized in Tab 6 of this permit renewal application.

r"►,
S CERTIFICATION OF THE DEVELOPMENT AND
IMPLEMENTATION OF A STORMWATER POLLUTION
PREVENTION PLAN FOR THE PERMITTED FACILITY

STORMWATER POLLUTION PREVENTION PLAN
DEVELOPMENT AND. IMPLEMENTATION
CERTIFICATION
North Carolina Division of Energy, Mineral, and Land Resources — Stormwater Program
Facility Name:
Asheville Steam Electric Plant dba Asheville Combined Cycle Station
Permit Number:
NCS000575
Location Address:
46 Duke Energy Lane
Arden, NC 28704
County: Buncombe
"I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all
attachments were developed and implemented under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information required by the SPPP.
Based on my inquiry of the person or persons who manage the system, or those persons directly responsible
for gathering the information, the information gathered is, to the best of my knowledge and belief, true,
accurate and complete."
And
"I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP
has been fully implemented at this facility location in accordance with the terms and conditions of the
stormwater discharge permit."
/6"W" And
"I am aware that there are significant penalties for falsifying information, including the possibility of fines and
imprisonment for knowing violations."
Sign (according to permit signatory requirements) and return this Certification. DO NOT
SEND STORMWATER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION.
Signature Date 101 o't7/ 9-0
Antonio D. Price, PE
Print or type name of person signing above
Plant General Manager II
Title
SPPP Certification 10/13

9 FISH TISSUE MONITORING REPORTS IN THE FRENCH
BROAD RIVER 2017 - 2019

ma
Asheville Steam Station
NPDES Permit No. NC0000396
Arsenic, Mercury, and Selenium Monitoring of Fish in the French Broad River
Buncombe County, North Carolina
Duke Energy Progress
June, 2020

Table of Contents
Page
1''1
1.0 Introduction..................................................................................................................... 1
2.0 Study Site Description and Sampling Locations.............................................................. 1
3.0 Target Species................................................................................................................... 1
4.0 Field Sampling Methods................................................................................................... 1
5.0 Laboratory Processing and Arsenic, Mercury, and Selenium Analysis ............................ 2
6.0 Data Analysis and Reporting............................................................................................ 2
7.0 References......................................................................................................................... 3
List of Tables
Page
Table
1 Arsenic, mercury, and selenium concentrations in axial muscle of fish from the
French Broad River during June, October, and November 2019..................................... 5
2 Baseline mercury and selenium concentrations in axial muscle of fish from the
French Broad River, August and November 2004.........................................................
List of Figures
31
Pa
Figure
1 French Broad River arsenic, mercury, and selenium monitoring locations ...................... 4
I

1.0 Introduction
Duke Energy Progress (DEP) owns and operates the Asheville Steam Station (Asheville Station)
located on the east side of the French Broad River in Buncombe County, Arden, North Carolina. As
required by the Asheville Station's National Pollutant Discharge Elimination System (NPDES) Permit
No. NC0000396 (current through December 31, 2019), Special Condition A. (13), monitoring of
arsenic, mercury, and selenium in fish from the French Broad River was conducted. Fish tissue
monitoring (mercury and selenium only) was originally required historically after Flue Gas
Desulfurization (FGD) operations commenced in December of 2005. This data report is submitted to
fulfill the annual monitoring as required by the NPDES pen -nit.
2.0 Study Site Description and Sampling Locations
Fish were collected from three locations within the French Broad River (Figure 1). These
locations were adjacent to the Asheville Station discharge (Station DI), 6.2 kilometers upstream
of the discharge (Station UP) and 10.8 kilometers downstream of the discharge (Station DN).
3.0 Target Species
r°` The target fish were black bass (preferred Smallmouth Bass) and sunfish (preferred Redbreast
Sunfish). Where the full complement of preferred target species was not available, Largemouth
and Bluegill were also included as necessary (Table 1). An attempt was made to collect 10 fish
per target species during three separate sampling events. As recommended by the U.S.
Environmental Protection Agency (USEPA) an attempt was made to limit the smallest fish to
75% of the largest fish total length by species depending on availability (USEPA 2000).
4.0 Field Sampling Methods
Fish were collected using electrofishing procedures specified in the DEP Biology Program
Procedures Manual (Procedure NR-00080, Rev. 2 and NR-00095, Rev. 1) which is approved by
the North Carolina Department of Environmental Quality under the DEP Biological Laboratory
Certification (# 006). Only live fish that showed little or no signs of deterioration were retained
for analysis and put in a labeled bag and placed on ice until frozen. Ancillary fisheries data
including species, total length (mm), and total weight (g) were also recorded. Fish collected were
transferred to a freezer daily and maintained frozen until processing at the DEP New Hill Trace
Element Laboratory. Associated water quality data including water temperature, dissolved

oxygen, and specific conductance were recorded daily at the surface at each sampling location
111106\ (available on request).
5.0 Laboratory Processing and Arsenic, Mercury, and Selenium Analysis
All fish samples were processed individually and analyzed in the trace element laboratory
according to procedure NR-00107, Rev. 4 Trace Element Monitoring Laboratory Procedure.
Quality control was achieved utilizing analytical standards, replicates, and certified reference
materials. Following analysis, residual processed samples were archived and will be kept for at
least two years in the event that re -analysis is needed.
6.0 Data Analysis and Reporting
Arsenic, mercury, and selenium concentrations (converted to µg/g wet weight) in the fish muscle
tissue collected during 2019 are shown in Table 1. In addition to the length and weight of each
fish, the dry -to -wet weight ratios are presented to convert the arsenic, mercury, and selenium
concentrations wet weight values back to dry weight values as desired. The 2004 baseline data
ra"` are presented as well for comparison purposes (Table 2).
Arsenic
During 2019, all 44 fish collected at all three sample locations were well below the USEPA
recreational screening value of 1.2 µg/g for arsenic (wet weight) (USEPA 2000).
Mercury
All sunfish species collected were below the USEPA recreational screening value of 0.4 µg/g (wet
weight) for mercury (USEPA 2000). One of six Largemouth Bass collected at Station UP, four of
six Smallmouth Bass at location Station DI, and four of five Smallmouth Bass at Station DN were
above the 0.4 µg/g mercury screening value. Two Largemouth Bass collected at Station DN were
below the mercury screening value. When evaluated, Smallmouth Bass appear to be slightly
greater accumulators of mercury compared to Largemouth Bass in the monitored reaches of
French Broad River.
2

Selenium
/IOM.
All fish collected were well below the USEPA recreational fisherman screening of 20 µg/g (wet
weight) (USEPA 2000).
When considered altogether, it does not appear that a pattern of arsenic, mercury, or selenium
accumulation in fish tissues during 2019 would be attributable to the Asheville Plant operations
(Table 2).
7.0 References
DER 2018. Asheville Steam Electric Plant mercury and selenium monitoring of fish in the French
Broad River. New Hill, NC.
USEPA. 2000. Guidance for assessing chemical contaminant data for use in fish advisories. Vol. 1.
Fish sampling and analysis. Third edition. EPA 823-B-00-007. United States Environmental
Protection Agency, Office of Water, Washington, DC.
3

Figure 1. French Broad River arsenic, mercury, and selenium monitoring locations.

Table 1. Arsenic, mercury, and selenium concentrations (wet weight) in axial muscle of fish
from the French Broad River during June, October, and November 2019.
Fish Species
Locations
Month
Length
(mm)
Weight
W
As (µg/g)
Wg (99/9)
Se (µglg)
Dry -to -Wet'
Weight Ratio
Redbreast Sunfish
UP
June
190
159
0.15
0.08
0.47
0.20
Redbreast Sunfish
UP
June
i90
149
0.13
0.07
0.59
0.19
Redbreast Sunfish
UP
June
196
158
0.14
< 0.06
0.46
0.20
Redbreast Sunfish
17P
June
203
166
0.15
0.06
0.46
0.20
Redbreast Sunfish
UP
June
186
138
0.14
0.08
0.49
0.20
Redbreast Sunfish
UP
June
180
123
0.14
< 0.06
0.65
0.21
Largemouth Bass
UP
October
488
1700
0.16
0.52
0.44
0.20
Largemouth Bass
UP
October
488
1700
0.15
0.18
0.33
0.20
Largemouth Bass
UP
October
415
1225
0,15
0,28
0.28
0.20
Bluegill
UP
November
184
130
0.16
<0.06
0.49
0.20
Redear Sunfish
UP
November
194
118
0.16
0.09
0.65
0.21
Redbreast Sunfish
UP
November
171
80
0.14
0.07
0.45
0.20
Largemouth Bass
UP
November
286
278
0.13
0.18
0.26
0.20
Largcmouth Bass
UP
November
280
246
0.14
0.17
0.30
0.20
Largemouth Bass
UP
November
349
636
0.14
0.33
0.23
0.20
Redbreast Sunfish
DI
June
182
135
0,14
0.07
0.47
0.20
Redbreast Sunfish
DI
June
179
99
0.13
0.08
1.06
0.19
Redbreast Sunfish
DI
June
165
84
0,14
0.08
0.62
0.19
Redbreast Sunfish
DI
October
200
128
0.13
0.07
0.23
0,20
Redbreast Sunfish
DI
October
200
128
0.13
0.15
0.84
0.19
Redbreast Sunfish
DI
October
188
122
0.14
0.14
0.44
0.19
Redbreast Sunfish
DI
October
182
91
0.12
0,11
1.27
0.19
Redbreast Sunfish
DI
October
179
94
0.14
0.10
0.36
0.19
Smallmouth Bass
DI
June
394
703
0.19
0.47
0.48
0.21
Smallmouth Bass
DI
June
306
297
0.15
0.80
0.49
0.19
Smallmouth Bass
DI
June
290
291
0.16
0.28
0,32
0.20
Smallmouth Bass
DI
October
438
1016
0.16
0.51
0.21
0.21
Smallmouth Bass
DI
October
283
274
0.17
0.37
0.29
0,21
Smallmouth Bass
DI
October
473
1406
0.17
0.65
0.30
0.22
Redbreast Sunfish
DN
October
180
91
0.14
< 0.06
0.55
0,21
Redbreast Sunfish
DN
October
192
122
0.15
0.37
0.60
0.18
Redbreast Sunfish
DN
October
193
125
0.15
0.09
0.58
0,20
Redbreast Sunfish
DN
October
200
156
0. l4
0.07
0.52
0.20
Redbreast Sunfish
DN
October
178
99
0.13
0.14
0.62
0.21
Redbreast Sunfish
DN
October
186
122
0.13
0.08
0.60
0.19
Redbreast Sunfish
DN
October
221
172
0.14
0.08
0.56
0.19
Bluegill
DN
October
193
150
0.13
0.10
0.35
0.20
Largemouth Bass
DN
October
327
460
0.14
0,21
0.37
0.20
Largemouth Bass
DN
October
269
217
0.14
0.19
0.41
0.19
Smallmouth Bass
DN
October
395
768
0.14
< 0.06
0.34
0.20
Smallmouth Bass
DN
October
329
422
0.15
0.53
0.41
0.21
Smallmouth Bass
DN
October
385
592
0.16
0.69
0,45
0.19
Smallmouth Bass
DN
October
245
177
0.15
0.12
054
0.20
Smallmouth Bass
DN
October
395
768
0.17
0.61
0.36
0.22
' To convert to a dry weight, divide the vvet weight concentrations
by the dry -to -wet
weight ratio.

Table 2. Baseline mercury and selenium concentrations (wet weight) in axial muscle of fish
from the French Broad River during August and November 2004.1
Fish Species
Locations
Month
Length
(MM)
Weight
(g)
Hg
(pg/g)
Se
(jLglg)
Dry -to -Wet=
Weight Ratio
Smalhnouth bass
LIP
August
246
201
0.87
0.39
0.22
Smallmouth bass
lip
August
297
370
0.49
0.36
0.21
Smallmouth bass
lip
August
346
620
0.44
0.22
0.22
Smalhnouth bass
lip
August
445
1.300
1.66
0.31
0.24
Smallmouth bass
lip
August
370
744
1 A9
0.30
0.20
Redbreast sunfish
lip
August
172
106
< 0.18
0.28
0.20
Redbreast sunfish
UP
August
160
87
0.32
0.24
0.20
Redbreast sunfish
UP
August
145
72
< 0.27
0,39
0.30
Redbreast sunfish
UP
August
149
60
< 0.17
0.25
0.21
Redbreast sun fish
UP
August
190
160
0,12
0.32
0.20
Black redhorse
UP
August
372
340
< 0.15
0.26
0.21
Black redhorse
UP
August
380
550
< 0.17
0.19
0.21
Black redhorse
UP
August
410
790
0.53
0.26
0.20
Black redhorse
UP
August
413
843
0.54
0.24
0.19
Black redhorse
UP
August
415
989
0,40
0.30
0.20
Black redhorse
lip
August
405
863
0.46
0.30
0.20
Largemouth bass
DI
August
475
1,725
0.74
1.23
0.21
Largemouth bass
DI
August
395
611
< 0.16
1.46
0.20
Largemouth bass
DI
August
405
795
0.17
0.21
0.21
Smullmntuh bass
DI
August
263
223
0.52
0.32
0.22
Smallmouth bass
DI
August
355
565
0.54
4.14
0.22
Smallmouth bats
Di
August
374
871
0.27
0.47
0.23
Smallmouth bass
DI
Aueust
368
802
0.74
0.25
0,22
Smallmouth bass
DI
August
440
1,300
0.99
0.45
0,22
Redbreast sunfish
DI
August
136
52
< 0.19
3.81
0.21
Redbreast sunfish
DI
August
183
108
< 0.17
3.61
0.19
.� Redbreast sunfish
DI
August
164
80
0?0
0.57
0.20
Redbreast sunfish
DI
Aueust
182
128
< 0.15
0,69
0,19
Redbreast sunfish
DI
August
177
109
0.74
1.23
0.20
Redbreast sunfish
DI
August
149
58
<0.16
1.46
0.20
Black redhorse
DI
August
375
< 0.18
0.26
0,30
0.22
Black redhorse
DI
August
383
0.25
0.25
0.30
0.21
Black redhorse
DI
August
457
0.52
0.48
0.50
0.20
Black redhorse
Di
August
465
0.76
0.21
0.20
0.21
Black redhOTSe
DI
August
493
0.69
0.21
0.20
0.21
Black redhorse
DI
August
475
0.43
0,77
0.80
0,20
Black redhorse
Di
November
410
<0.18
0,26
0.20
0.20
Smallntoulh bass
DN
November
277
265
0.29
0.57
0.21
Smallmouth bass
I)N
November
295
410
0.32
0.15
0.21
Smallmouth bass
DN
Novembt.'r
310
460
0.77
0.35
0.22
Smallmouth bass
DN
November
347
620
0.68
0.33
0.22
Smallmouth bass
I)N
November
345
750
0.40
0.29
0.22
Bluegill
DN
August
135
59
< 0.16
0.33
UO
Redbreast sunfish
DN
August
162
66
0.32
0.83
0.20
Redbreast sunfish
DN
August
175
96
< 0.18
0.76
0.22
Redbreast sunfish
DN
August
185
139
0.25
0.31
0.19
Redbreast sunfish
I)N
August
198
t56
<0.15
0.27
0.19
Redbreast sunfish
I)N
August
273
324
0,54
0.19
0.21
Redbreast sunfish
DN
August
126
46
< 0.14
0.41
0.20
Redbreast sunfish
DN
August
187
170
0.12
0.73
0.20
Redbreast sunfish
DN
August
198
154
< 0.16
0.93
0,20
Black redhorse
DN
August
365
509
< 0.2
0.50
0.20
Black redhorse
DN
August
356
518
0.1
0.30
0.20
Black redhorse
DN
August
375
651
< 0.2
0.80
0,20
Black redhorse
DN
August
395
755
< 0.2
0.50
0.20
Black redhorse
DN
August
398
R10
0.5
0.40
0.21
Black redhorse
DN
August
423
910
< 0.2
0.40
0.19
t Arsenic was not required by
permit during baseline monitoring.
mow. To convert to a dry weight.
divide the wet weight concentrations by the
dry -to -wet weight
ratio.

n
Asheville Steam Station
NPDES Permit No. NC0000396
Mercury and Selenium Monitoring of Fish in the French Broad River
Poll', Buncombe County, North Carolina
Duke Energy Progress
April, 2019

,•ft-�
Table of Contents
Pa
Se
1.0 Introduction .................... 1
2.0 Study Site Description and Sampling Locations.............................................................. 1
3.0 Target Species................................................................................................................... 1
4.0 Field Sampling Methods................................................................................................... 1
5.0 Laboratory Processing and Selenium Analysis................................................................. 2
6.0 Data Analysis and Reporting............................................................................................ 2
7.0 References......................................................................................................................... 3
List of Tables
Page
Table
1 Mercury and selenium concentrations in axial muscle of fish from the
French Broad River during June, October, and November 2018..................................... 5
2 Baseline mercury and selenium concentrations in axial muscle of fish from the
French Broad River, August and November 2004............................................................ 7
List of Figures
Page
Figure
1 French Broad River mercury and selenium monitoring locations .................................... 4
i

1.0 Introduction
Duke Energy Progress (DEP) owns and operates the Asheville Steam Station (Asheville Station)
located on the east side of the French Broad River in Buncombe County, Arden, North Carolina. As
required by the Asheville Station's National Pollutant Discharge Elimination System (NPDES) Pen -nit
No. NC0000396 (current prior to December 1, 2018), Special Condition A. (13), monitoring of
mercury and selenium in fish from the French Broad River began after Flue Gas Desulfurization
(FGD) operations commenced in December of 2005. Sampling was conducted according to the
previously approved monitoring plan. This data report is submitted to fulfill the annual monitoring as
required by the above NPDES permit.
2.0 Study Site Description and Sampling Locations
Fish were collected from three locations of the French Broad River (Figure 1). These locations
were adjacent to the Asheville Station discharge (Station DI), 6.2 kilometers upstream of the
discharge (Station UP) and 10.8 kilometers downstream of the discharge (Station DN).
3.0 Target Species
000b" The target fish were black bass (preferred Smallmouth Bass), sunfish (preferred Redbreast
Sunfish) and suckers (preferred Black Redhorse). Where the full complement of preferred target
species were not available, Largemouth Bass, Rock Bass, Spotted Bass, Bluegill, and Golden
Redhorse were substituted as necessary (Table 1). As recommended by the U.S. Environmental
Protection Agency (USEPA) an attempt was made to limit the smallest fish to 75% of the largest
fish total length by species depending on availability (USEPA 2000).
4.0 Field Sampling Methods
Fish were collected using electrofishing procedures specified in the DEP Biology Program
Procedures Manual (Procedure NR-00080, Rev. 2 and NR-00095, Rev. 1) which is approved by
the North Carolina Department of Environmental Quality under the DEP Biological Laboratory
Certification (# 006). Only live fish that showed little or no signs of deterioration were retained
for analysis and put in a labeled (date, station, etc.) bag and placed on ice until frozen. Ancillary
fisheries data including species, number, total length (mm), and total weight (g) were also
recorded. Each day collected fish were transferred to a freezer on -site and maintained in the
frozen state until processing at the DEP New Hill Trace Element Laboratory. Associated water

quality data including water temperature, dissolved oxygen, and specific conductance were
,,q recorded daily at the surface at each sampling location.
5.0 Laboratory Processing and Mercury and Selenium Analysis
All fish samples were processed in the trace element laboratory according to procedure NR-
00107, Rev. 4 Trace Element Monitoring Laboratory Procedure. Aliquots of the processed
samples (lyophilized left axial muscle; right muscle occasionally included when needed) were
sent to Pace Analytical for analysis (EPA 7374 — Hg, EPA 6020 — Se). Quality control was
achieved utilizing analytical standards, replicates, and certified reference materials. Following
analysis, the processed samples were archived and will be kept at least two years in the event
that re -analysis is needed.
6.0 Data Analysis and Reporting
Mercury and selenium concentrations (converted to µg/g wet weight) in the fish muscle tissue
collected during 2018 are shown in Table 1. In addition to the length and weight of each fish, the
'°ok` dry -to -wet weight ratios are presented to convert the mercury and selenium concentrations wet
weight values back to dry weight values as desired. The 2004 baseline data are presented as well
for comparison purposes (Table 2). During 2018, 67 of the 88 fish collected at all three sample
locations were below the North Carolina Health Directors Mercury Action Advisory Level of 0.4
µg/g wet weight (NCDHHS 2006). At location UP, one Golden Redhorse, two Redbreast
Sunfish, two Largemouth Bass, two Rock Bass, and two Smallmouth Bass had mercury
concentrations in axial muscle (edible flesh) equivalent to or greater than the advisory level
(highlighted in Table 1). Eight Golden Redhorse and one Smallmouth Bass at location DI had
mercury tissue concentrations above the advisory level while one Redbreast Sunfish and one
Smallmouth Bass at location DN were above the level (also highlighted in Table 1). Based on the
mercury concentrations in fish at all three locations, the bioaccumulation pattern appears to be
random with no apparent contribution of mercury in fish tissues attributable to the Asheville
Station discharge to the French Broad River. During 2018, all fish collected at the three locations
were below the North Carolina human consumption advisory level of 10 µg/g (wet weight) for
selenium, however, two fish (highlighted in Table 1) of 27 fish collected at location DI were
0004,
slightly above the USEPA screening value of 2.457 µg/g (wet weight) for subsistence fishermen
(USEPA 2000).
2

7.0 References
NCDHHS. 2006. Health effects of methylmercury and North Carolina's advice on eating fish.
North Carolina Occupational and Environmental Epidemiology Branch. Raleigh, NC.
USEPA. 2000. Guidance for assessing chemical contaminant data for use in fish advisories. Vol. 1.
Fish sampling and analysis. Third edition. EPA 823-B-00-007. United States Environmental
Protection Agency, Office of Water, Washington, DC.

Figure L French Broad River mercury and selenium monitoring locations.
4

Table 1. Mercury and selenium concentrations (wet weight) in axial muscle of fish from the
French Broad River during June, October, and November 2018.
Fish Species
Locations
Month
Length
Weight
Hg
Se
Dry -to -Wet*
(MM)
(g)
(µg/g)
(µg/g)
Weight Ratio
Golden Redhorse
UP
June
475
959
0.35
0.20
0.20
Golden Redhorse
UP
June
362
460
0.13
0.17
0.22
Golden Redhorse
UP
June
350
408
0.14
0.17
0.21
Golden Redhorse
UP
June
401
564
0.23
0.14
0.19
Golden Redhorse
UP
June
449
1049
0.31
0.23
0.21
Golden Redhorse
UP
June
420
616
0.49
0.15
0.20
Golden Redhorse
UP
June
408
616
0.30
0.20
0.21
Golden Redhorse
UP
June
456
965
0.35
0.15
0.18
Golden Redhorse
UP
June
422
736
0.31
0.17
0.21
Golden Redhorse
UP
June
432
917
0.36
0.22
0.18
Largemouth Bass
DI
October
253
224
0.20
0.45
0.20
Largemouth Bass
UP
November
359
701
0.48
0.17
0.20
Largemouth Bass
UP
November
362
680
0.45
0.22
0.20
Redbreast Sunfish
UP
June
173
105
0.16
0.29
0.20
Redbreast Sunfish
UP
June
180
118
0.05
0.40
0.22
Redbreast Sunfish
UP
June
210
176
0.09
0.53
0.21
Redbreast Sunfish
UP
June
195
175
0.06
2.12
0.21
Redbreast Sunfish
UP
June
180
144
0.08
0.28
0.22
Redbreast Sunfish
UP
June
195
142
0.08
0.63
0.20
Redbreast Sunfish
UP
June
190
145
0.60
0.24
0.20
Redbreast Sunfish
UP
June
171
125
0.48
0.26
0.22
Redear Sunfish
UP
November
234
245
0.17
0.58
0.21
Redear Sunfish
UP
November
193
124
0.47
0.34
0.21
Rock Bass
UP
June
220
184
0.17
0.46
0.21
Rock Bass
UP
June
225
250
0.56
0.39
0.21
Rock Bass
UP
June
235
249
0.34
0.40
0.21
Rock Bass
UP
June
212
237
0.58
0.20
0.20
Smallmouth Bass
UP
June
355
520
0.05
0.75
0.21
Smallmouth Bass
UP
June
218
121
0.06
0.42
0.20
Smallmouth Bass
UP
June
230
162
0.43
0.24
0.20
Smallmouth Bass
UP
June
260
240
0.35
0.31
0.20
Redbreast Sunfish
DI
October
155
71
0.08
2.74
0.20
Redbreast Sunfish
DI
October
194
170
0.24
0.22
0.20
Bluegill
DI
October
134
40
0.04
2.20
0.20
Bluegill
DI
October
137
58
0.06
0.32
0.19
Bluegill
DI
October
156
80
0.04
1.89
0.20
Bluegill
DI
October
139
52
0.06
0.35
0.19
Bluegill
DI
October
134
46
0.10
0.30
0.19
Bluegill
DI
October
116
32
0.05
3.23
0.19
Golden Redhorse
DI
June
430
798
0.45
0.15
0.17
Golden Redhorse
DI
June
450
912
0.43
0.21
0.19
Golden Redhorse
DI
June
440
997
0.43
0.30
0.19
Golden Redhorse
DI
June
510
1168
0.47
0.16
0.20
Golden Redhorse
DI
June
535
1401
0.58
0.24
0.20
Golden Redhorse
DI
June
515
1120
0.42
0.24
0.20
Golden Redhorse
DI
June
453
843
0.59
0.19
0.19
Golden Redhorse
DI
June
516
1285
0.38
0.18
0.21
Golden Redhorse
DI
June
533
1420
0.39
0.14
0.20
Golden Redhorse
DI
June
425
767
0.47
0.18
0.18
Rock Bass
DI
October
183
129
0.14
0.24
0.20
Rock Bass
DI
October
153
76
0.12
0.33
0.20
Rock Bass
DI
October
167
98
0.11
0.26
0.20
Rock Bass
DI
October
155
76
0.18
0.43
0.21
Rock Bass
DI
October
165
83
0.12
0.27
0.20
Rock Bass
DI
October
190
137
0.12
1.92
0.21
Rock Bass
DI
October
156
83
0.12
0.36
0.20
Smallmouth Bass
DI
October
243
210
0.92
0.41
0.21
Smallmouth Bass
DI
October
243
203
0.19
0.16
0.22
Golden Redhorse
DN
June
482
1025
0.18
0.39
0.21
Golden Redhorse
DN
June
451
926
0.37
0.49
0.19
Aw"�'

oaftl,
(Table 1 cont.)
Fish Species
Locations
Month
Length
Weight
Hg
Se
Dry -to -Wet*
(mm)
(g)
(µg/g)
(µg/g)
Weight Ratio
Golden Redhorse
DN
June
415
744
0.38
0.44
0.18
Golden Redhorse
DN
June
465
1028
0.40
0.38
0.20
Golden Redhorse
DN
June
432
835
0.18
0.57
0.20
Golden Redhorse
DN
June
372
509
0.11
0.50
0.21
Golden Redhorse
DN
June
480
1127
0.39
0.45
0.20
Golden Redhorse
DN
June
470
985
0.18
0.47
0.21
Golden Redhorse
DN
June
430
944
0.32
0.49
0.20
Golden Redhorse
DN
June
442
829
0.33
0.35
0.17
Redbreast Sunfish
DN
October
176
104
0.17
0.37
0.20
Redbreast Sunfish
DN
October
16l
70
0.17
0.44
0.20
Redbreast Sunfish
DN
October
144
60
0.17
0.56
0.21
Redbreast Sunfish
DN
October
128
42
0.09
0.62
0.21
Redbreast Sunfish
DN
October
180
125
0.06
0.44
0.20
Redbreast Sunfish
DN
October
169
94
0.10
0.40
0.20
Redbreast Sunfish
DN
October
180
116
0.11
0.42
0.20
Redbreast Sunfish
DN
October
195
165
0.15
0.44
0.18
Redbreast Sunfish
DN
October
184
145
0.12
0.36
0.20
Redbreast Sunfish
DN
October
182
115
0.08
0.34
0.20
Rock Bass
DN
June
170
99
0.07
0.46
0.21
Rock Bass
DN
October
211
171
0.49
0.39
0.20
Rock Bass
DN
October
138
59
0.1 I
0.62
0.20
Rock Bass
DN
October
157
82
0.08
0.65
0.20
Rock Bass
DN
October
180
125
0.29
0.44
0.19
Smallmouth Bass
DN
June
200
96
0.06
0.50
0.20
Smallmouth Bass
DN
June
332
478
0.60
0.32
0.20
Smallmouth Bass
DN
June
228
148
0.28
0.61
0.20
Smallmouth Bass
DN
October
205
119
0.18
0.44
0.20
Smallmouth Bass
DN
October
196
94
0.12
0.58
0.20
/-%m� * To convert to a dry weight, divide the wet weight concentrations by the dry -to -wet weight ratio.
#10h.,
6

Table 2. Baseline mercury and selenium concentrations (wet weight) in axial muscle of fish
from the French Broad River during August and November 2004.
Fish Species
Locations
Month
Length
Weight
Hg
Se
Dry -to -Wet*
(MM)
(g)
(µg/g)
(µg/g)
Weight Ratio
Smallmouth bass
UP
August
246
201
0.87
0.39
0.22
Smallmouth bass
UP
August
297
370
0.49
0.36
0.21
Smallmouth bass
UP
August
346
620
0.44
0.22
0.22
Smallmouth bass
UP
August
445
1,300
1.66
0.31
0.24
Smallmouth bass
UP
August
370
744
1.49
0.30
0.20
Redbreast sunfish
UP
August
172
106
<0.18
0.28
0.20
Redbreast sunfish
UP
August
160
87
0.32
0.24
0.20
Redbreast sunfish
UP
August
145
72
< 0.27
0.39
0.30
Redbreast sunfish
UP
August
149
60
< 0. 17
0.25
0.21
Redbreast sunfish
UP
August
190
160
0.12
0.32
0.20
Black redhorse
UP
August
372
540
< 0.15
0.26
0.21
Black redhorse
UP
August
380
$50
< 0.17
0.19
0.21
Black redhorse
UP
August
410
790
0.53
0.26
0.20
Black redhorse
UP
August
413
943
0.54
0.24
0.19
Black redhorse
UP
August
415
989
0.40
0.30
0.20
Black redhorse
UP
August
405
863
0.46
0.30
0.20
Largemouth bass
DI
August
475
1,725
0.74
1.23
0.21
Largemouth bass
DI
August
395
611
< 0.16
1.46
0.20
Largemouth bass
DI
August
405
795
0.17
0.21
0.21
Smallmouth bass
DI
August
263
223
0.52
0.32
0.22
Smallmouth bass
DI
August
355
565
0.54
4.14
0.22
Smallmouth bass
DI
August
374
871
0.27
0.47
0.23
Smallmouth bass
DI
August
368
802
0.74
0.25
0.22
Smallmouth bass
DI
August
440
1,300
0.99
0.45
0.22
Redbreast sunfish
DI
August
136
52
< 0.19
3.81
0.21
Redbreast sunfish
DI
August
183
108
< 0.17
3.61
0.19
Redbreast sunfish
DI
August
164
80
0.20
0.57
0.20
Redbreast sunfish
DI
August
182
128
< 0.15
0.69
0.19
Redbreast sunfish
DI
August
177
109
0.74
1.23
0.20
_ Redbreast sunfish
DI
August
149
58
<0.16
1.46
0.20
Black redhorse
DI
August
375
< 0. 18
0.26
0.3
0.22
Black redhorse
DI
August
383
0.25
0.25
0.3
0.21
Black redhorse
DI
August
457
0.52
0.48
0.5
0.20
Black redhorse
DI
August
465
0.76
0.21
0.2
0.21
Black redhorse
DI
August
493
0.69
0.21
0.2
0.21
Black redhorse
DI
August
475
0.43
0.77
0.8
0.20
Black redhorse
DI
November
410
<0.18
0.26
0.2
0.20
Smallmouth bass
DN
November
277
265
0.29
0.57
0.21
Smallmouth bass
DN
November
295
410
0.32
0.15
0.21
Smallmouth bass
DN
November
310
460
0.77
0.35
0.22
Smallmouth bass
DN
November
347
620
0.68
0.33
0.22
Smallmouth bass
DN
November
345
750
0.40
0.29
0.22
Bluegill
DN
August
135
59
< 0.16
0.33
0.20
Redbreast sunfish
DN
August
162
66
0.32
0.83
0.20
Redbreast sunfish
DN
August
175
96
< 0.18
0.76
0.22
Redbreast sunfish
DN
August
185
139
0.25
0.31
0.19
Redbreast sunfish
DN
August
198
156
< 0.15
0.27
0.19
Redbreast sunfish
DN
August
273
324
0.54
0.19
0.21
Redbreast sunfish
DN
August
126
46
< 0.14
0.41
0.20
Redbreast sunfish
DN
August
187
170
0. l2
0.73
0.20
Redbreast sunfish
DN
August
198
154
< 0.16
0.93
0.20
Black redhorse
DN
August
365
509
< 0.2
0.5
0.20
Black redhorse
DN
August
356
518
0.1
0.3
0.20
Black redhorse
DN
August
375
651
< 0.2
0.8
0.20
Black redhorse
DN
August
395
755
< 0.2
0.5
0.20
Black redhorse
DN
August
388
810
0.5
0.4
0.21
Black redhorse
DN
August
423
910
< 0.2
0.4
0.19
* To convert to a dry weight, divide the wet weight concentrations by the dry -to -wet weight ratio.

Asheville Steam Station
NPDES Permit No. NC0000396
Mercury and Selenium Monitoring of Fish in the French Broad River
1-06, Buncombe County, North Carolina
Duke Energy Progress
April, 2018

Table of Contents
Page
1.0 Introduction....................................................................................................
2.0 Study Site Description and Sampling Locations.............................................................. 1
3.0 Target Species................................................................................................................... 1
4.0 Field Sampling Methods................................................................................................... l
5.0 Laboratory Processing and Selenium Analysis................................................................. 2
6.0 Data Analysis and Reporting............................................................................................ 2
7.0 References......................................................................................................................... 3
List of Tables
page
Table
l Mercury and selenium concentrations in axial muscle of fish from the
French Broad River during June, October, and November 2017..................................... 5
2 Baseline mercury and selenium concentrations in axial muscle of fish from the
French Broad River, August and November 2004............................................................ 7
List of Figures
Paae
Fieure
I French Broad River mercury and selenium monitoring locations .................................... 4

1.0 Introduction
Duke Energy Progress (DEP) owns and operates the Asheville Steam Station (Asheville Station)
located on the east side of the French Broad River in Buncombe County, Arden, North Carolina. As
required by the Asheville Station's National Pollutant Discharge Elimination System (NPDES) Permit
No. NC0000396, Special Condition A. (13), monitoring of mercury and selenium in fish from the
French Broad River began after Flue Gas Desulfurization (FGD) operations commenced in December
of 2005. Sampling was conducted according to the previously approved monitoring plan. This data
report is submitted to fulfill the monitoring program as required by the NPDES permit.
2.0 Study Site Description and Sampling Locations
Fish were collected from three locations of the French Broad River (Figure 1). These locations
were adjacent to the Asheville Station discharge (Station DI), 6.2 kilometers upstream of the
discharge (Station UP) and 10.8 kilometers downstream of the discharge (Station DN).
3.0 Target Species
The target fish were black bass (preferred Smallmouth Bass), sunfish (preferred Redbreast
Sunfish) and suckers (preferred Black Redhorse). Where the full complement of preferred target
species were not available, Largemouth Bass, Rock Bass, Spotted Bass, Bluegill, and Golden
Redhorse were substituted as necessary (Table I ). As recommended by the U.S. Environmental
Protection Agency (USEPA) an attempt was made to limit the smallest fish to 75% of the largest
Fish total length by species depending on availability (USEPA 2000).
4.0 Field Sampling Methods
Fish were collected using electrofishing procedures specified in the DEP Biology Program
Procedures Manual (Procedure NR-00080, Rev. 1) which is approved by the North Carolina
Department of Environmental Quality under the DEP Biological Laboratory Certification (# 006).
Only live fish that showed little or no signs of deterioration were retained for analysis and put in a
labeled (date, station, etc.) bag and placed on ice until frozen. Ancillary fisheries data including
species, number, total length (mm), and total weight (g) were also recorded. Each day collected
Fish were transferred to a freezer on -site and maintained in the frozen state until processing at the
DEP New Hill Trace Element Laboratory. Associated water quality data including water
r temperature, dissolved oxygen, and specific conductance were recorded daily at the surface at
each sampling location.

4=►,
5.0 Laboratory Processing and Mercury and Selenium Analysis
All fish samples were processed in the trace element laboratory according to procedure NR-
00107, Rev. 4 Trace Element Monitoring Laboratory Procedure. Aliquots (0.15 grams) of the
processed samples (lyophilized left axial muscle; right muscle occasionally included when
needed) were analyzed For mercury and selenium by x-ray spectro photometry. Quality control
was achieved utilizing analytical standards, replicates, and certified reference materials.
Following analysis, the processed samples were archived and will be kept at least two years in
the event that re -analysis is needed.
6.0 Data Analysis and Reporting
Mercury and selenium concentrations (converted to µg/g wet weight) in the fish muscle tissue
collected during 2017 are shown in Table 1. In addition to the length and weight of each fish, the
dry -to -wet weight ratios are presented to convert the mercury and selenium concentrations wet
weight values back to dry weight values as desired. The 2004 baseline data are presented as well
Amok, for comparison purposes (Table 2). During 2017, 80 of the 90 fish collected at all three sample
locations were below the North Carolina Health Directors Mercury Action Advisory Level of 0.4
µg/g wet weight (NCDHHS 2006). At location UP, one Black Redhorse, one Smallmouth Bass,
and one Spotted Bass had mercury concentrations in axial muscle (edible flesh) equivalent to or
greater than the advisory level (highlighted in Table 1). Only one fish at location D1, a Rock
Bass, had mercury tissue concentrations above the advisory level while two Golden Redhorse and
three Smallmouth Bass at location DN were above the level (also highlighted in Table 1). Based
on this mercury bioaccumulation pattern, there was no apparent contribution of mercury in fish
tissues that was attributable to the Asheville Station discharge to the French Broad River. During
2017, all fish collected at the three locations were below the North Carolina human consumption
advisory level of 10 µg/g (wet weight) for selenium, however, three fish (highlighted in Table l)
of thirty fish collected at location D1 were slightly above the USEPA screening value of 2.457
µg/g (wet weight) for subsistence fishermen (USEPA 2000).
2

No
7.0 References
NCDHHS. 2006. Health effects of methylmercury and North Carolina's advice on eating fish.
North Carolina Occupational and Environmental Epidemiology Branch. Raleigh, NC.
USEPA. 2000. Guidance for assessing chemical contaminant data for use in fish advisories. Vol. 1.
Fish sampling and analysis. Third edition. EPA 823-B-00-007. United States Environmental
Protection Agency, Office of Water, Washington, DC.

. qJ21
m
"IMI'l I � -

Table 1. Mercury and selenium concentrations (wet weight) in axial muscle of fish from the
''MN French Broad River during June, October, and November 2017.
Fish Species
Locations
Month
Length
Weight
Ng
Se
Dry -to -Wet*
(mm)
(g)
(µglg)
(µg/g)
Weight Ratio
Redbreast Sunfish
UP
June
206
227
024
034
020
Redbreast Sunfish
UP
June
196
166
021
036
021
Redbreast Sunfish
UP
June
183
120
008
0.28
020
Redbreast Sunfish
UP
June
183
136
0 I I
033
019
Redbreast Sunfish
UP
June
187
135
007
033
020
Redbreast Sunfish
UP
June
184
121
Oil
037
0 18
Redbreast Sunfish
UP
June
188
141
012
030
019
Redbreast Sunfish
UP
June
180
126
015
035
0 19
Redbreast Sunfish
UP
June
171
113
<0 03
1 12
020
Redbreast Sunfish
UP
June
164
94
Oil
042
Oil)
Smallmouth Bass
UP
June
377
555
090
017
0 19
Smallmouth Bass
UP
June
300
369
025
024
019
Smallmouth Bass
UP
June
319
450
039
027
020
Smallmouth Bass
UP
June
245
211
039
045
020
Smallmouth Bass
UP
June
270
262
029
095
020
Rock Bass
UP
June
221
236
023
039
0.20
Rock Bass
UP
June
221
245
029
036
0 19
Rock Bass
UP
June
213
200
015
055
0 19
Rock Bass
UP
June
198
190
0 19
037
0 19
Spotted Bass
UP
June
316
464
0.50
037
019
Black Redhorsc
UP
June
455
1062
022
025
019
Black Redhorsc
UP
June
395
530
014
0 19
020
Black Rcdhorse
UP
June
397
593
036
023
020
Black Redhorsc
UP
June
443
838
0.22
017
020
Black Redhorse
UP
June
400
615
031
021
020
Black Redhorse
UP
June
442
741
0.27
0 16
020
Black Redhorsc
UP
June
407
788
018
0.22
021
Black Redhorsc
UP
June
457
924
0.49
024
0 ?-
Black Redhorsc
UP
June
447
744
026
016
021
Black Redhorsc
UP
June
446
764
034
019
019
Redbreast Sunfish
DI
June
204
179
010
041
0.21
Redbreast Sunfish
DI
October
159
82
008
1.27
0 19
Redbreast Sunfish
DI
October
153
60
0 14
2.50
0 19
Redbreast Sunfish
DI
October
168
75
<0 05
095
0.20
Redbreast Sunfish
DI
October
162
67
<0 05
2.56
019
Redbreast Sunfish
DI
October
167
80
<0.05
061
0.16
Redbreast Sunfish
DI
October
181
84
<0 05
0.36
0.17
Blucgtll
DI
June
170
122
014
064
017
Bluegill
DI
June
150
69
-0 05
3.92
0 18
Blucgtll
DI
June
153
68
009
0.69
0.21
Smallmouth Bass
DI
June
205
128
020
022
020
Smallmouth Bass
DI
June
188
90
0 14
028
0.21
Smallmouth Bass
DI
June
314
424
0 is
016
0.20
Smallmouth Bass
DI
June
311
460
026
0.29
0 19
Smallmouth Bass
DI
June
181
79
0.21
036
020
Smallmouth Bass
DI
June
201
110
024
0.42
019
Smallmouth Bass
DI
June
191
99
0 IS
0.64
020
Smallmouth Bass
DI
June
202
118
023
037
021
Smallmouth Bass
DI
October
359
640
034
016
021
Rock Bass
DI
June
217
238
0.48
026
021
Golden Redhorsc
DI
June
383
626
030
024
0.20
Golden Redhorsc
DI
June
444
958
030
020
019
Golden Redhorsc
DI
June
421
832
0.34
021
0.20
Golden Redhorsc
Dl
June
408
774
023
024
0.22
Golden Redhorsc
DI
June
450
906
030
022
0.20
Golden Redhorsc
DI
June
435
826
031
0.41
021
Golden Redhorse
DI
June
440
942
031
067
021
Golden Redhorsc
DI
June
427
942
029
1.52
021
Black Redhorsc
DI
June
450
1072
039
025
020
Black Redhorsc
DI
June
505
1200
0.49
022
021
i0014N

(Table Y cont.)
Fish Species Locations Month Length Weight Hg Se Dry -to -Wet'
(MM)
(g)
(µg/g)
(µ /fig)
Weight Ratio
Redbreast Sunfish
DN
June
174
122
0,24
075
020
Redbreast Sunfish
DN
June
184
116
0.21
0.69
019
Redbreast Sunfish
DN
June
139
62
008
077
020
Redbreast Sunfish
DN
November
172
90
0 11
079
0 19
Redbreast Sunfish
DN
November
175
102
0.07
047
019
Redbreast Sunfish
DN
November
180
115
Oil
066
020
Redbreast Sunfish
DN
November
195
116
012
0,65
020
Redbreast Sunfish
DN
November
186
106
0 l s
067
019
Redbreast Sunfish
DN
November
I80
97
<0 05
079
0 19
Redbreast Sunfish
DN
November
193
132
0 11
023
020
Smallmouth Bass
DN
June
307
356
0.26
081
020
Smallmouth Bass
DN
June
168
70
023
055
0 19
Smallmouth Bass
DN
June
281
284
0.35
045
0 19
Smallmouth Bass
DN
June
273
288
0.24
071
020
Smallmouth Bass
DN
June
282
302
030
083
020
Smallmouth Bass
DN
June
315
418
0.42
074
021
Smallmouth Bass
ON
June
408
746
0.51
045
020
Smallmouth Bass
DN
June
285
325
0.42
071
020
Smallmouth Bass
DN
June
180
86
0.20
062
020
Smallmouth Bass
DN
June
173
68
015
080
018
Black Redhorse
DN
October
515
1200
038
057
019
Golden Redhorse
DN
October
441
1000
032
073
019
Golden Redhorse
DN
October
464
1044
036
073
019
Golden Redhorse
DN
October
426
822
036
060
0 18
Golden Redhorse
DN
October
437
938
028
074
0 19
Golden Redhorse
DN
October
443
998
026
063
0 18
Golden Redhorse
DN
October
446
982
038
066
0 19
Golden Redhorsc
DN
October
474
1175
0.53
063
0 18
Golden Redhorse
DN
October
545
1350
0.57
045
018
Golden Redhorse
DN
October
421
870
028
046
017
* To convert to a dry weight, divide the wet weight concentrations by the dy-to-wet weight ratio

Table 2. Baseline mercury and selenium concentrations (wet weight) in axial muscle of fish
from the French Broad River during August and November 2004.
Fish Species
Locations
Month
Length
Weight
Hg
Se
Dry -to -Wet*
(MM)
(a)
(µg )
(µg/g)
Weight Ratio
Smallmouth bass
UP
August
246
201
087
039
022
Smallmouth bass
UP
August
297
370
0.49
036
021
Smallmuuth bass
UP
August
346
620
044
022
022
Smallmouth bass
tip
August
445
1.300
166
031
0.24
Smallmouth bass
UP
August
370
744
149
030
020
Redbreast sunfish
UP
August
172
106
< 0 18
028
020
Redbreast sunfish
UP
August
160
87
032
024
020
Redbreast sunfish
UP
August
145
72
< 0 27
039
030
Redbreast sunfish
UP
August
149
60
< 0 17
0.23
021
Redbreast sunfish
UP
August
l90
160
0 12
032
020
Black rcdhorsc
UP
August
372
540
< 0 15
026
021
Black rcdhorsc
UP
August
380
550
< 0 17
019
021
Black redhorse
UP
August
410
790
0.53
026
020
Black rcdhorsc
UP
August
40
843
0.54
024
019
Block redhorse
UP
August
415
989
0.40
030
020
Black redhorse
UP
August
405
863
0.46
030
020
hargemouth bass
DI
August
475
1,725
0.74
123
021
Largemouth bass
DI
August
395
611
= 0 16
146
020
Largemouth bass
DI
August
405
795
0 17
021
021
Smallmouth bass
DI
August
263
223
0.52
032
022
Smallmouth bass
DI
August
335
565
054
4 14
0 22
Smallmouth bass
DI
August
374
971
027
047
023
Smallmouth bass
DI
August
368
802
074
025
022
Smallmouth bass
DI
August
440
1 300
0.99
045
022
Redbreast sunfish
DI
August
136
52
< 0 19
381
021
Redbreast sunfish
DI
August
183
108
< 0 17
3.61
019
Redbreast sunfish
DI
August
164
80
020
0.37
020
Redbreast sunfish
DI
August
182
128
< 0 l5
0.69
019
Redbreast sunfish
DI
August
177
109
074
1.23
020
Redbreast sunfish
DI
August
149
58
<0 16
146
020
Black redhorse
DI
August
375
0 18
0.26
0 3
022
Black rcdhorsc
DI
August
383
023
025
03
021
Black rcdhorsc
DI
August
457
052
0.48
05
020
Black redhorse
DI
August
465
076
021
02
021
Black rcdhorsc
DI
Aucust
493
069
021
0.2
021
Black rcdhorsc
DI
August
475
043
0.77
0.8
020
Black rcdhorsc
DI
November
410
-018
026
02
020
Smallmouth bass
DN
November
277
265
029
057
021
Smallmouth bass
DN
November
295
410
032
0 15
021
Smallmouth bass
DN
November
310
460
077
035
022
Smallmouth bass
DN
November
347
620
068
0.33
022
Smallmnuth bass
DN
November
345
750
0.40
0.29
022
Bluegdl
DN
August
135
59
< 0 16
033
020
Redbreast sunfish
DN
August
162
66
032
083
020
Redbreast sunfish
DN
August
175
96
< 0. 18
076
022
Redbreast sunfish
DN
August
185
139
0.25
031
019
Redbreast sunfish
DN
August
198
156
< 0 15
0.27
0 19
Redbreast sunfish
DN
August
273
324
0.54
019
021
Redbreast sunfish
DN
August
126
46
< 0 14
041
020
Redbreast sunfish
DN
August
187
170
012
073
020
Redbreast sunfish
DN
August
198
154
< 0 16
093
0 20
Black redhorse
DN
August
365
509
< 0 2
03
020
Black redhorse
DN
August
356
518
0 1
03
020
Black redhorse
DN
August
375
651
< 0 2
09
020
BIack rcdhorsc
DN
August
395
755
< 0 2
05
020
Black redhorse
DN
August
398
810
0.5
04
021
Black redhorse
DN
August
423
910
< 0 2
04
0 19
• To convert to a dry %%eight. divide the act +vetght concentrations by the dry -to -wet weight ratio.
/l"bk+