NCS000546_MONITORING INFO_20190212

STORMWATER DIVISION CODING SHEET
NCS PERMITS
PERMIT NO.
nl 1, � � U 0
1'
DOC TYPE
❑FINAL PERMIT
OxlVIONITORING REPORTS
❑ APPLICATION
❑ COMPLIANCE
❑ OTHER
900
DOC DATE
❑
YYYYMMDD

DUKE
ENERGY
Allen Stccrrrr Srrurnn
253 Plow Allen Rd.
Belmont, NC 28012
'Rr-G IVED
FEB k 1 2019
February 5, 2019
CENTRAL FILES
DWR SECTION
NC Department of Environmental Quality
Attention: Central Files
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy Carolinas, LLC
NPDES Storm Water Discharge Monitoring Report for:
Allen Steam Station — NCS000546 — Gaston County
In accordance with Part III, E(2) of the above referenced NPDES Storm Water permit, the original and one
copy of the monthly monitoring reports for the outfalls that have been classified as Tier 2 or Tier 3 and are
now subject to monthly sampling, are attached. The period for sampling ended on January 31, 2019.
Enclosed is the DMR for outfalls SW001, SW007, SW009, SW010, SW016, SW018 and SW020.There
were no samples collected from these outfalls and are listed as "No Flow" for the sampling period. This was
due to either nighttime rainfall events or lack of qualifying rainfall events.
Please direct any correspondence or questions concerning the Allen Steam Station NPDES Storm Water
Program to Elizabeth Glenn at [phone].
Yours truly,
Terry W. Tuck, General Manager II
Allen Steam Station
Duke Energy Carolinas, LLC
Attachments
bc: w/attachment Elizabeth Glenn
Steve Hodges
Tina Woodward
UPS Tracking: 1Z X67 601 24 9466 8198
RECEIVED
FEB 12 2019
G"N'rRgL t~ILN
DWR SECT101

STORMNVATER DISCHARGE OU'CFALL (SDO)
iMONITORING REPORT
Permit Number NCS000546
FACILITY NAIME Allen Steam Station
PERSON COLLECTING SA,tiMPLE(S) NA
CERTIFIED LABORATORY(S) Duke Energy Carolinas, LLC NC Lai) #248
Shealy Environmental Services, Inc. NC Lah #329
Part A: Specific (Monitoring Requirements
SAiMPLES COLLECTED DURING CALENDAR YEAR: 2019
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Gaston
PHONE NO. [phone]
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 3.
Outfall
Date
50050
00400
01077
01002
01022
01012
01027
No.
Sample
Collected
Total
Flow (if app.)
Total
Rainfall
pH
Silver, Total (as
Ag)
Arsenic,
Total (as As)
Boron, Total
(as B)
Beryllium,
Total (as Be)
Cadmium,
Total (as Cd)
mo/dd/ r
MG
inches
mgtL
m L
m L
m L
m L
S1511101
NIA
NIA
NO FLOW FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
S1N'007
NIA
NIA
NO FLOW
FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
S1V009
NIA
NIA
NO FLOW
FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
SN%1010
NIA
NIA
NO FLOW FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
SWI116
NIA
NIA
NO FLOW
FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
SWI118
NIA
NIA
NO FLOW
FOR THIS OUTFALL FOR THE ,MONTH OF JANUARY 2019
SW020
NIA
NIA
NO FLOW
FOR THIS OUTFALL FOR THE ,iNIONTH OF JANUARY 2019
Outfall
No.
Date
Sample
Collected
01034
01042
01067
01051
01097
0.1147
01059
01092
Chromium,
Total (as Cr)
Copper, Total
(as Cu)
Nickel, Total
(as Ni)
Lead, Total
(as Ph)
Antimony,
Total (as Sb)
Selenium,
Total (as Se)
Thallium,
Total (As Tl)
Zinc, Total (as
Zn)
mo/dd/ r
m L
m L
m L
m
m
m L
m L
m L
SW001
N/A
NO FLOW FOR
THIS OUTFALL FOR THE MONTH OF JANUARY 2019
SWO07
N/A
NO FLOW FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
SW009
NIA
NO FLOW FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
SWI110
NIA
NO FLOW FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
S1V016
NIA
NO FLOW FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
SNVO18
NIA
NO FLOW FOR THIS OUTFALL FOR THE MONTH OF JANUARY 2019
S1 020
NIA
NO FLOW FOR THIS OUTFALL FOR THE ,MONTH OF JANUARY 2019
Permit Numher NCS000546 Form SWU-247, last revised 21212012
Pa-e 1 of 3

Outfall
Date
71900
C0530
00556
No.
Sample
Mercury,
Solids, Total
Oil & Grease
Collected
Total, Method
Suspended -
1631E
Concentration
mo/dd/ yr
n L
m L
m L
SW001
NIA
NO FLOW FOR THIS OUTFALL FOR THE
i1lONTH OF JANUARS' 2019
SNVO07
NIA
NO FLOW FOR THIS OUTFALL FOR THE
MONTH OF JANUARY 2019
SW009
NIA
NO FLOW FOR THIS OUTFALL FOR THE
MONTH OF JANUARY 2019
SW010
NIA
NO FLOW FOR THIS OUTFALL FOR THE
MONTH OF JANUARY 2019
SW016
NIA
NO FLOW FOR THIS OUTFALL FOR THE
MONTH OF JANUARY 2019
SW018
N/A
NO FLOW FOR THIS OUTFALL FOR THE
MONTH OF JANUARY 2019
SNV020
NIA
NO FLOW FOR THIS OUTFALL FOR THE
it'IONTH OF JANUARY 2019
Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month'. w yes X no
(il' yes, complete Part B)
Part B: Vehicle Maintenance Activity Monitoring Requirements
Outfall
Date
50050
00556
00530
00400
Total Flow
Total
Oil & Grease
Non -polar
Total
pH
New Motor
No.
Sample
Collected
(if applicable)
Rainfall
(if appl.)
O&GITPH
Suspended
Oil Usage
(Method 1664
Solids
SGT-HEM), if
appl.
mo/dd/ r
MG
inches
mgA
MO
unit
al/mo
NOTE: January 2019 samples not collected due to unqualified rain events or adverse weather conditions.
Permit Number NCS000546 Form SWU-247. last revised 21212012
Page 2 of i

STORNI EVENT CHARACTERISTICS: NIail Original and one copy to:
Division of Water Quality
Date NA Attn: Central Files
Total Event Precipitation (inches): NA 1617 Mail Service Center
Event Duration (hours): (only if applicable — see permit.) Raleigh, North Carolina 27699-1617
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only i [applicable — see permit.)
"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
or persons 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 arc significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
(Signature of
L Is,2,o 17
(Date)
Permit Number NCS000546 Form SWU-247, last revised 21212012
Page 3 of 3

1 �� DUKE
ENERGY,
January 23, 2019
NC Department of Environmental Quality
Attention: Central Files
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy Carolinas, LLC
NPDES Storm water Discharge Monitoring Report for:
Allen Steam Station — NCS000546 — Gaston County
RECENF-D
JAIL 2 5 2019
CENTRAL FILES
[MR SECTION
Allen Steam Station
Duke Energy
253 Plant Allen Rd.
Belmont, NC 28012
In accordance with Part III, E(2) of the above referenced NPDES Storm water permit, the
original and one copy of the quarterly monitoring reports for Year 4 — Period 2 are attached. The
period for sampling ended on December 31, 2018.
Outfalls SWO01A, SW008, SW013-7, SW013-8, SW013-9, SW013-10, SW013-11, SW013-12,
SW013-13, SW013-14 and SW013-15 are listed as "No Flow" during the period. Samples were
not collected from these outfalls due to night time rainfall events, inclement weather or lack of
qualifying rainfall events during the period.
Please direct any correspondence or questions concerning the Allen Steam Station NPDES
Stormwater Program to Elizabeth Glenn at [phone].
Yours truly,
Terry Tuck, General Manager II
Allen Steam Station
Fossil Hydro- Carolinas West
Attachments
bc: w/attachment
Elizabeth Glenn
Tina Woodward
Steve Hodges
UPS Tracking: 1Z X67 601 24 9521 0410

STORN-IWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS000546
FACILITY NAME Allen Steam Station
PERSON COLLECTING SAMPLE(S) Miles Hamilton/Steve Hanvlton/CARDNO
CERTIFIED LABORATORY(S) Duke Energy of the Carolinas, LLC Lab #218
Shealv Environmental Services, NC Lab #329
Part A: Specific Monitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR: 2018
(This monitoring report shall he received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Gaston
PHONE NO. [phone]
EQ
Nt\TUBE OF PER,�IITTEE OR DESIGNEE
UIRED ON PAGE 4.
Outfall
No.
Date
Sample
Collected
50050
00400
01077
01002
01022
O t012
01027
Total
Flow (if app.)
Total
Rainfall
pH
Silver, Total (as
Ag)
Arsenic,
Total (as As)
Boron, Total
(as B)
Beryllium,
Total (as Be)
Cadmium,
Total (as Cd)
mo/dd/ yr
NIG
inches
m L
m L
m h
m L
m L
S%V00lA
N/A
N/A
NO FLOW FOR THIS OUTFALL FOR YEAR
4 PERIOD 2
SW008
N/A
N/A
I NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-7
N/A
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWIll3-8
N/A
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWIl13-9
N/A
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SW013-10
N/A
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SW013-11
NIA
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SW1113-12
NIA
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWIl13-13
N/A
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-14
N/A
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-15
N/A
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
Permit Number NCS000546 Firm SWU-247. last rei,ised 21212012
Pa(re 1 of 4

Outfall
No.
Date
Sample
Collected
01034
01042
01067
01051
01097
01147
01059
01092
Chromium,
Total (as Cr)
Copper, Total
(as Cu)
Nickel, Total
(as Ni)
Lead, Total
(as Pb)
Antimony,
Total (as Sb)
Selenium,
Total (as Se)
Thallium.
Total (As Tl)
Zinc, Total (as
Zn)
mo/dd/ •r
m L
m L
mgfL
m L
m L
m L
m L
m L
SNVOOIA
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SIVOO
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-7
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-8
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-9
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-10
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SW013-11
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-12
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-13
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-14
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SW013-15
NIA j
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
Permit Number NCS000546 Fonn SWU-247. lust revised 2/2/2012
Paae 2 of 4

Outfall
No.
Date
Sample
Collected
71900
CO530
00556
Mercury, Total,
Method 1631E
Solids, Total
Suspended -
Concentration
Oil & Grease
moldd/ yr
n L
m L
m L
S1V001A
NIA
NO FLOW FOR THIS
OUTFALL FOR
YEAR 4 PERIOD 2
SW008
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
S1VO13-7
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-8
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-9
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-10
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-1 l
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SWO13-12
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SW013-13
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
W013-14
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
SW01345
NIA
NO FLOW FOR THIS OUTFALL FOR YEAR 4 PERIOD 2
Dees this facility perform Vehicle Maintenance Activities using ruore than 55 gallons of new motor oil Per rnontli? _ ves X no
(if yes, complete Part B) —
Part B: Vehicle IN-laintenance Activity NIonitoring Requirements
Outfall
Date
50050
00556
00530
00400
No.
Sample
Total Flow
Total
Oil & Grease
Non -polar
Total
pH
New Motor
Collected
(if applicable)
Rainfall
(if appl.)
O&G/TPH
Suspended
Oil Usage
(Method 1664
Solids
SGT-HEINI), if
appl.
mo/dd/ yr
MG
inches
of
m
unit
gaurno
Permit Number NCS000546 Form SWU-247. last revised 2122012
Page 3 of 4

STORi)d EVENT CHARACTERISTICS: Mail Original and one copy to:
Division of Water Quality
Date Attn: Central Files
Total Event Precipitation (inches): 1617 Mail Service Center
Event Duration (hours): (only if applicable — see perrni(.) Raleiuh. North Carolina 27699-1617
(if more than one storm event wits sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only il' applicable — sec permit.)
"1 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. Fused on my inquiry of the person
or persons 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."
(Signature oPPermittce)
Z Zo!
(Date)
Permit Numher NCS000546 Form SWU-247. Iasi remised 2/2/2012
Page 4 44

Allen Steam Station
DUKE
NERGY.
January 23, 2019
N.C. Department of Environmental Quality
Attention: Central Files
Division of Water Resources
1617 Mail Service Center
Raleigh, N.C. 27699-1617
Subject: Duke Energy Carolinas, LLC
NPDES Storm Water Discharge Monitoring Report for:
Allen Steam Station — NCS000546 — Gaston County
Duke Energy
253 Plant Allen Rd.
Belmont, NC 28012
RECF-I ED
JAN 2 5 2019
CEN'I"RAL FILES
DVIR SECTION
In accordance with Part III, E(2) of the above referenced NPDES Storm Water permit, the
original and one copy of the monthly monitoring reports are attached. The samples collected are
required monthly due to Tier Two or Tier Three Status. The period for sampling ended
December 31, 2018.
Samples were collected on December 20, 2018. Samples for the following outfalls were
collected: SW001, SW002, SW003, SW007, SW009, SW010, SW016, SW018 and SW020.
The laboratory results were received on January 10, 2019. Analytes sampled above the
benchmark values for analytical monitoring are as follows. Duke Energy has performed the
steps required by the Tier Two and will perform the steps required by Tier Three status
for these outfalls.
OutfalI
Parameter
Result
Benchmark
SW003
TSS
160 ma/L
100 m /L
SW007
TSS
130 mg/L
100 ma/L
SW007
Zinc
0.415 ma/L
0.126 nia/L
SWO10
TSS
700 rn-/L
100 m /L
SWO10
Zinc
m
0.164/L
0.126 ma/L
SWO10
Copper
0.049 nw,/L
0.010 mU/L
SW016
Zinc
0.145 m /L
0.126 m /L
SW016
1 pH
15.9 SU
6-9 SU
All values reported on the attached reports are dependent on the accuracy of approved
analytical methods used to measure parameters.

Allen Steam Station
DUKE
�'. ENERGY
Duke Energy
253 Plant Allen Rd.
Belmont, NC 28012
Please direct any correspondence or questions concerning the Allen Steam Station NPDES
Storm Water Program to Elizabeth Glenn at [phone].
Yours truly,
W,
Terry Tuck, General Manager II
Allen Steam Station
Duke Energy Carolinas, LLC
Attachments
bc: w/attachment
Elizabeth Glenn
Tina Woodward
Steve Hodges
UPS Tracking: 1 Z X67 601 24 9521 0410

STORNIWATER DISCHARGE OUTFALL (SDO)
,MONITORING REPORT
Permit Number NCS000546
FACILITY NANIE Allen Steam Station
PERSON COLLECTING SAiMPLE(S) Miles Hamilton/Steve Hamilton/CARDNO
CERTIFIED LABORATORY(S) Duke Energy of the Carolinas, LLC Lab #248
Shealy Environmental Services NC Lab #329
Part A: Specific tMonitoring Requirements
SAMPLES COLLECTED DURING CALENDAR YEAR: 2018
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
COUNTY Gaston
PHONE NO. (70 ) 829-2350
SIGNATURE OF PERIMITTEE OR DESIGNEE
REQUIRED ON PAGE 3.
Outfall
No.
Date
Sample
Collected
50050
00400
01077
01002
01022
01012
01027
Total
Flow (if app.)
Total
Rainfall
pH
Silver, Total (as
Ag)
Arsenic,
Total (as As)
Boron, Total
(as B)
Beryllium,
Total (as Be)
Cadmium,
Total (as Cd)
mo/dd/ yr
MG
inches
m L
m IL
m
m
m L
SWO01
12/20/18
N/A
1.49
8.0
<0.0002
<0.001
<0.05
<0.001
<0.0411
SW002
12/20/18
N/A
1.49
7.9
<0.0002
0.00209
<0.05
<0.001
<0.001
SW003
12/20/18
NIA
1.49
8.4
<0.0002
0.00122
<0.05
<0.001
<0.001
SWOO7
12/20/18
NIA
1.49
8.0
<0.0002
0.00124
<0.05
<0.001
.<0.001
SW009
12/20/18
NIA
1.49
8.2
<0.0002
0,00130
<0.05
<0.001
<0.001
SWO10
12/20/18
NIA
1.49
8.0
<0.0002
0,0105
<0.05
<0.001
<0.001
S1V016
12/20/18
N/A
1.49
5.9
<0.0002
<0.001
<0.05
<0.001
<0.001
SW018
12/20/18
NIA
1.49
7.4
<0.0002
<0.001
<0.05
<0.001
<0.001
SW020
12/20/18
NIA
1.49
7.7
<0.0002
<0.001
<0.05
<0.001
<O.001
Permit Numher NCS000546 Form SWU-247, last remised 21212012
Page I of 3

Outfall
No.
Date
Sample
Collected
01034
01042
01067
01051
01097
01147
01059
01092
Chromium,
Total (as Cr)
Copper, Total
(as Cu)
Nickel, Total
(as NO
Lead, Total
(as Pb)
Antimony,
Total (as Sb)
Selenium,
Total (as Se)
Thallium,
Total (As TI)
Zinc, Total (as
Zn)
mo/dd/vr
m L
m L
m L
m L
mgfL
m L
m L
m L
SW4101
12/20/18
0.00183
0.110359
<0.001
0.00145
<0.001
<0.001
<0.0002
0.050
SIV002
12/20/18
0.00174
0.00526
0.00144
0.00209
<0.001
<0.001
<0.0002
0.029
SW003
12/20/18
0.00296
0.00684
0.00182
0.00214
<0.001
<0.001
<0.0002
0.099
SW007
12/20/18
0.00162
0.00345
0.00125
0.00137
<0.001
<0.001
<0.0002
0.415
SW009
12/20/18
11.00101
0.00311
<0.001
0.00146
<0.001
0.00178
<0.0002
0.119
SWOW
12/20118
0.0205
0.0491
0.0202
41.0169
<0.001
0.00391
0.000363
0.164
SAVO16
12/20/18 1
0.00257
<0.001
<0.001
<0.001
<0.001
<0.001 i
<0.0002
0.145
SWO18
12/20/18
<0.001
<0.001
<0.001
<0.001
<0.0111
<0.001
<0.0002
<0.005
SW020
12/20/18
0.00263
0.00778
0.00193
0.00134
<0.0111
<0.001
<0.0002
0.037
Outfall
No.
Date
Sample
Collected
71900
C0530
00556
Mercury, Total,.
Method 1631E
Solids, Total
Suspended -
Concentration
Oil & Grease
mo/dd/yr. .
n L
m L
m L
S111001
12/20/18
13.2
88
SWO02
12/20/18
12.6
55
S W O03
12/20/18
11.0
160
SW007
12/20/18
3.2
130
S%V009
12/20/18
3.39
15
S%V0I0
12/20/18
60.9
700
SWO16
12/20/18
1.1
<5
SW018
12/20/18
1.31 Avg
<5
<5.1
S W 020
12/20/18
14.6
86
Avg. - Average of Ho primary and duplicate samples (1.25 ng/L and 1.36 ng/L = 1.31 n« L)
The following nutfalls had Ho results of>12 nU/L and must he documented on the DMR: SWOO1 13.2 ng/L. SWO02 12.6 ng/L, SWO10 60.9 ng/L, SW020 14.6 ng/L
Benchmark crceedances include Copper at SWOIO: Zinc at SW007. SWO10. and SWO16; TSS at SW003. SW007. and SWOIO; pH at SWO16.
Permit Number NCS000546 Form SWU-247. last revised 2/212012
Page 2 of 3

Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month'? _ yes X no
(if yes. complete Part B)
Part B: Vehicle Maintenance Activity MonitoringRe uirements
Outfall
Date
50050
00556
00530
00400
No.
Sample
Total Flow
Total
Oil & Grease
Non -polar
Total
pH
New Motor
Collected
(if applicable)
Rainfall
(i€ appl.)
O&G/TPH
Suspended
Oil Usage
(Method 1664
Solids
SGT-HEM), if
appl.
mo/dd/ r
I MG linches
m
m
unit
galImo
STORM EVENT CHARACTERISTICS: Mail Original and one copy to:
Division of Water Quality
Date 12/20/18 Attn: Central Files
Total Event Precipitation (inches): 1.49 1617 Mail Service Center
Event Duration (hours): (only if applicahlc — see permit.) Raleigh, North Carolina 27699-1617
(if store than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicahlc — see permit.)
"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
or persons 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."
(Signature of eermittee)
112,5 Z°t
(Date
Permit Number NCS000546 Form SWU-247. last revised 2122012
Page 3 of 3

Allen steam Station
Duke Energy
DUKEBelmont, Plant Allen mont, NC 28012012
ENERGY®
December 18, 2018
N.C. Department of Environmental Quality
����Attention: Central Files
Division of Water Resources DEC 2 0 2013
1617 Mail Service Center
Raleigh, N.C. 27699-1617 1--fliN"r1 1 FILL„
IDIPIR SE(,-1"10,"1
Subject: Duke Energy Carolinas, LLC
NPDES Storm Water Discharge Monitoring Report for:
Allen Steam Station — NCS000546 — Gaston County
In accordance with Part III, E(2) of the above referenced NPDES Storm Water permit, the
original and one copy of the monthly monitoring reports are attached. The samples collected are
required monthly due to Tier Two or Tier Three Status. The period for sampling ended
November 30, 2018.
Samples were collected on November 2, 2018. Samples for the following outfalls were
collected: SW001, SW005, SW007, SW009, SWO10, SWO16, SW018 and SW020. The
laboratory results were received on November 25, 2018. Analytes sampled above the
benchmark values for analytical monitoring are as follows. Duke Energy has performed the
steps required by the Tier Two and will perform the steps required by Tier Three status
for these outfalls.
Outfall
Parameter
Result
Benchmark
SWOO1
Zinc
0.17 niQ/L
0.126 nig/L
SWOO1
TSS
120 mQ/L
100 ma/L
SWO09
Zinc
0.134 mg/L
0.126 mg/L
SWO10
TSS
410 mg/L
100 ni-/L
SWO10
Zinc
0.171 ma/L
0.126 m /L
SWO10
Copper
0.0427 mg/L
0.010 mg/L
SW016
Zinc
0.252 mg/L
0.126 m /L
SW020
opper
0.0179 m /L
0.010 ma/L
SW020
TSS
360 mg/L
100 m /L
All values reported on the attached reports are dependent on the accuracy of approved
analytical methods used to measure parameters.

Allen Steam Station
(� DUKE
ENERGY.
Duke Energy
253 Plant Allen Rd.
Belmont, NC 28012
Please direct any correspondence or questions concerning the Allen Steam Station NPDES
Storm Water Program to Elizabeth Glenn at [phone].
Yours truly,
JA� W. J4--fC
Terry Tuck, General Manager II
Allen Steam Station
Duke Energy Carolinas, LLC
Attachments
bc: wlattachment
Elizabeth Glenn
Tina Woodward
Steve Hodges
UPS Tracking: 1 Z X67 601 24 9680 2378

STORNINVATER DISCHARGE OUTFALL (SDO)
N-IONITORING REPORT
Permit Number NCS000546 SAMPLES COLLECTED DURING CALENDAR YEAR: 2018
(This monitoring report shall be received by the Division no later than 30 days from
the date the facility receives the sampling results from the laboratory.)
FACILITY NAME Allen Steam Station
PERSON COLLECTING SANIPLE(S) Peter Dav/Steve Hamilton- Vendor CARDNO
CERTIFIED LABORATORY(S) Duke Energv of the Carolinas, LLC Lab #248
Shealy Environmental Services, NC -Lab #329
Part A: Specific Nlonitorin Re uirements
COUNTY Gaston
PHONE NO. [phone]
SIGNATURE OF PERNIITTEE OR DESIGNEE
REQUIRED ON PAGE 3.
Outfall
No.
Date
Sample
Collected
50050
00400
01077
01002
01022
01012
01027
Total
Flow (if app.)
Total
Rainfall
pH
Silver, Total (as
Ag)
Arsenic,
Total (as As)
Boron, Total
(as B)
Beryllium,
Total (as Be)
Cadmium,
Total (as Cd)
mo/dd/yr
NIG
inches
mg/L
mg/L
mg/L
mg/L
mgfL
SAVO01
11/2/18
NIA
0.53
7.6
<0.0002
0.00253
<0.05
<0.001
<0.00I
SWO05
11/2/18
N/A
0.53
8.1
<0.0002
<0.001
<0,05
<0.001
<0.00I
SWO07
11/2/l8
N/A
0.53
8.0
<0.0002
0.00166
<0.05
<0.001
<0.00l
SAV009
1112118
N/A
0.53
7.6
<0.0002
0.00138
<0.115
<0.001
<0.00I
SW010
11/2/18
N/A
0.53
7.9
<0.0002
0.00717
<0.05
<0.001
<0.001
SWO16
11/2/18
NIA
0.53
7.0
<0.0002
0.00113
<0.05
<0.001
<0.001
S1V018
11/2/18
N/A
0.53
7.5
<0.0002
<0.001
<0.05
<0.001
<0.001
SAV020
11/2118
N/A
0.53
7.8
<0.0002
<0.4101
<0.05
<0.(101
<0.001
Outfall
No.
Date
Sample
Collected
01034
01042
01067
01051
01097
01147
01059
01092
Chromium,
Total (as Cr)
Copper, Total
(as Cu)
Nickel, Total
(as Ni)
Lead, Total
(as Ph)
Antimony,
Total (as Sb)
Selenium,
Total (as Se)
Thallium,
Total (As Tl)
Zinc, Total (as
Zn)
mo/dd/ •r
mg/L
m L
-mg/L
mg/L
mg/L
mg/L
mg/L
m L
S W001
11/2/18
0.00597
0.00745
0.00191
0.00198
<0.001
0.00129
<0.0002
0.170
SWO05
11/2/18
<0.001
0.00322
<0.001
<0.001
<O.00 I
<0.00 t
<0.0002
0.082
SW007
11/2/18
<0.001
0.00323
<0.001
<0.001
<0.00I
<0.001
<0.0002
0.072
SW009
11/2/18
0.00136
0.00520
0.00144
0.00210
<0.001
0.00336
<0.0002
0.134
SWOW
11/2/18
0.0171
0.0427
0.0158
0.0130
<0.001
0.0106
11.000347
0.171
MV016
11/2/18
0.00756
0.00949
0.00326
0.00206
<0.001
<0.001
<0.0002
0.252
5NV018
11/2/18
<0.00I
<0.001
<0.001
<0.001
<O.00I
<0moI
<0.0002
<O.005
SW020
11/2/18
0.00695
0.0179
0.00563
0.00373
<0A01
<0.0111
1 <(1.0002
10.084
Permit Number NCS000546 Form SWU-247, last revised 21M012
Page 1 of 3

Outfall
No.
Date
Sample
Collected
71900
C0530
00556
Mercury,
Total, Method
1631E
Solids, Total
Suspended -
Concentration
Oil & Grease
mo/dd/vr
ng/L
m L
m L
SWW)1
11/2/18
13.7*
120
SWO05
11/2/18
1.96
6.6
S%V007
11/2/18
2.48
19
SW009
11/2/18
3.43
22
S%VU10
11/2/18
21.1*
410
SW016
11/2118
5.53
68
SWO18
11/2/18
0.938
<5
<4
SW020
11/2/18
11.0 Avg.
360
* Mercury result for SWI101 was 13.7 ng/L and for SW010 was 21.1 ng/L and are noted here as they are greater than the benchmark of 12ng/L.
Avg.- Average of primary and duplicate samples (13.6 ng/L and 8.45 ng/L = 11.0 ng/L)
Exceedances include TSS & Zinc (Zn) at SW001, Zine(Zn) at SWO09, Zinc(Zn), Copper(Cu), & TSS at SW010, Zinc(Zn) at SW016 and Copper(Cu) &
TSS at SW020.
Does this facility perform Vehicle Maintenance Activities using more than 55 gailons of new motor oil per month? _yes X no
(if yes, complete Part B)
Part B- Vehicle Maintenance Activity Monitoring Requirements
Outfall
Date
50050
00556
00530
00400
No.
Sample
Total Flow
Total
Oil & Grease
Non -polar
Total
pH
New Motor
Collected
(if applicable)
Rainfall
(if appl.)
O&G/TPH
Suspended
Oil Usage
(Method 1664
Solids
SGT-HEM), if
a 1.
mo/dd/ r
AMG
inches
m
m
unit
al/mo
Permit Number NCS000546 Form SWU-247, last revised 21212012
Page 2 ol' 3

STORM EVENT CHARACTERISTICS:
Date 11/2/2018
Total Event Precipitation (inches): 0.53
Event Duration (hours): (only if applicable — see permit.)
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Ralei,h. North Carolina 27699-1617
"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
or persons who manage the system, or those persons directly responsible for gathering; the information, the information submitted is, to the
hest 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."
k).
of Permittee)
Z f$
(Date
Permit Number NCS000546
Form SWU-247. lctsf revised 2/2/2012
Page 3 of 3