NCS000546 DMR SW

t
Allen Steam Station
Duke Energy
253 Plant Allen Rd.
Belmont, NC 28012
February 26, 2016
NC Department of Environmental Quality MAR 01 2016
Attention: Central Files
Division of Water Quality CENTRAL FILES
1617 Mail Service Center DWR SECTION
Raleigh, NC 27699-1617
Subject: Duke Energy Carolinas, LLC
NPDES Storm Water Discharge Monitoring Report for:
Allen Steam Station —ihJ,SD 0.564 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 Year 1 — Period 3(quarterly sampling)
and Year 1- Period 2(semi-annual sampling) are attached The period for sampling ends on
March 31, 2016 for quarterly sampling and June 30, 2016 for semi-annual sampling.
Samples were collected from outfalls on January 15, 2016. Samples for the following outfalls
were collected: SW001, SW002, SW003, SW008, SW009, SW012; SW016, SWO18and
SW020. The laboratory results were received on February 1 , 2016. Analytes sampled
above the benchmark values for analytical monitoring are as follows. Duke Energy has
performed the steps required by the Tier One and Tier Two status for these outfalls.
Outfall
Parameter
Result
Benchmark
SW001
Zinc
0.247 mg/L
0.126 mg/L
SWO12
Zinc
0.131 mg/L
0.126 mg/L
SWO16
Copper
0.021 mg/L
0.010 mg/L
SWO16
TSS
360 mg/L
100 mg/L
SWO18
Copper
0.034 mg/L
0.010 mg/L
SWO18
TSS
830 mg/L
100 mg/L
SW020
Copper
0.023 mg/L
0.010 mg/ L
SW020
TSS
230 mg/L
100 mg/L
All values reported on the attached reports are dependent on the accuracy of approved
analytical methods used to measure parameters.
Please direct any correspondence or questions concerning the Allen Steam Station NPDES
Storm Water Program to Ross Hartfield at [phone].

Yours truly,
Brent Dueitt, General Manager II
Allen Steam Station
Fossil Hydro- Carolinas West
Attachments
bc- w/attachment Ross Hartfield
Tina Woodward
Don Scruggs
UPS Tracking: 1Z X67 601 42 9007 2652

ICE
ENERGY.
CAROLINAS
August 11, 2015
NC Department of Natural Resources AUG 12 2015
Division of Dater Resources CENTRAL FILES
Attention: Central Files DWR SECTION
1617 flail Service Center
Raleigh, NC 27699-1617
Subject: Non-stormwater Discharge Evaluation - 6d Certification
Steam Station (P'em`I'urnber NC�SOOtiSd'
Coal Combustion Products
Environmental Health, & Safety
Duke Energy Carolinas, LLC
526 South Church Street
Charlotte, NC 28202
Mailing Address
Mail Code EC13K/ P O Box 1006
Charlotte, NC 28201-1006
Pursuant to Part II, Section A: 1.(e) of the above referenced stormwater permit, Duke Energy
Carolinas, LLC (Duke Energy) is providing the first annual certification of the permitted
stormwater outfalls for the presence of non-stormwater discharges. For any non-stormwater
discharge identified, Duke Energy shall indicate how the discharge is an allowable non-
stormwater discharge. The following is a summary of the findings from this effort for the first
permit year.
The stormwater outfalls where observed during a period where no significant rainfall was
recorded in the 72 hours prior to the visual observation. All stormwater outfalls exhibited no
discharge at the time of observation except for the following:
a Outfall SWO07 — observed conditions indicate that this discharge is uncontaminated
groundwater and allowable under this permit;
a Outfall SWO15 — observed conditions indicate that this discharge is water from springs and
allowable under this permit;
® Outfall SWO11— observed conditions indicate that this discharge is miscellaneous once -
through non -contact cooling water and intake screen backwash water and authorized under
NPDES Permit Number NCO004979 (outfall 004);
e Outfall SWO12 — observed conditions indicate that this discharge is miscellaneous once -
through non -cooling water and authorized under NPDES Permit Number NCO004979 (outfall
003).
Should you have any questions regarding this submittal or require additional information, please
contact Ross Hartfield at 980-373-6583 or email [e-mail].
"1 certify, under penalty of law, that this document and all attachments were prepared under my
direction or super✓ision in accordance with a system design 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,

DUKE
ENERGY.,
CAROLINAS
and complete. 1 am aware there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations. "
Sincerel _
Brent Dueitt
General Manager II
I nnua( Certification
Van-Stornm ater Discharge
Page 2

DUKE
ENERGY.
CAROLINAS
14 August 2015
NC Department of Natural Resources
Division of Water Resources
Attention: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Coal Combustion Products
Environmental, Health, & Safety
Duke Energy Carolinas, LLC
526 South Church Street
Charlotte, NC 28202
Mailing Address
Mail Code EC13K/ P O Box 1006
Charlotte, NC 28201-1006
Subject: Non-stormwater Discharge Evaluation and Certification For Additional Group
SW013 Outfalls at Allen Steam Station ( cFnni' N'.un berZN SO.0_ x`6)1
Two additional stormwater outfalls have been discovered in Group SW013 (see letters dated 6
August 2015 and 13 August 2015). Subsequently, these outfalls were added to the Allen Steam
Station stormwater permit (NCS000546), and pursuant to Part II, Section A:1.(e) of the
aforementioned permit, Duke Energy is providing certification that the stormwater outfalls have
been evaluated for the presence of non-stormwater discharges.
The two stormwater outfalls where observed during a period where no significant rainfall was
recorded in the 72 hours prior to the visual observation. All stormwater outfalls exhibited no
discharge at the time of observation.
Should you have any questions regarding this submittal or require additional information, please
contact Ross Hartfield at 980-373-6583 or email [e-mail].
"i certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system design 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. l am aware there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
Sincerely, � e
Brent Dueitt
General Manager II

CHAIN OF CUSTODY RECORD AND
ANALYSIS REQUEST. FORM
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STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS 000546 SAMPLES COLLECTED DURING CALENDAR YEAR: 2015
(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 COUNTY Gaston
PERSON COLLECTING SAMPLE(S) Staff PHONE NO. [phone]
CERTIFIED LABORATORY(S) Duke Energy of the Carolinas LLC Lab #248
Shealy Environmental Services, NC Lab #329
SIGNATURE OF PERMITTEE OR DESIGNEE
Part A: Specific Monitoring Requirements REQUIRED ON PAGE 2.
Outfall Date
50050
01034
00400
00530
01022
01092
01097
01002
No. Sample
Total
Total
pH
Solids, Total
Boron, Total
Zinc, Total (as
Antimony,
Arsenic, Total
Collected
Flow (if app.)
Rainfall
(as Ni)
Suspended-
(as B)
Zn)
Total (as Sb)
as (As)
m/L
m/L
m/L
m/Lm/L
Concentration
<0.001
<0.001
<0.001
0.0047
mo/dd/ r
MG
inches
SU
m /L
m /L
m /L
m /L
m /L
SWO02 10/28/15
N/A
1.30
7.13
8.0
0.112
0.033
<0.001
<0.001
Outfall Date
No. Sample
Collected
SWO02 110/28/15
01012
01027
01034
01042
01051
01067
01147
01077
Beryllium,
Cadmium,
Chromium,
Copper, Total
Lead, Total
Nickel, Total
Selenium,
Silver, Total
Total (as Be)
Total (as Cd)
Total (as Cr)
(as Cu)
(as Pb)
(as Ni)
Total (as Se)
(as Ag)
m/L
m/L
m/L
m/L
m/L
m/L
m/Lm/L
<0.001
<0.001
<0.001
0.0047
<0.001
0.00128
0.0024J:<O.0003
Outfall Date
No. Sample
01059
71900
Thallium,
Mercury,
Collected
Total (as TI)
Total, Method
1631E
mo/dd/ r
m /L
n /L
SWO02 10/28/15
<0.0002
13.085
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)
Form SWU-247, last revised 2/212012
Page 1 of 2

Part B: Vehicle Maintenance Activity MonitorinL Requirements
Outfall Date
No. Sample
Collected
50050
00556
00530
00400
Total Flow
(if applicable)
Total
Rainfall
Oil & Grease
(if appl.)
Non -polar
O&G/TPH
Total
Suspended
pH
New Motor
Oil Usage
(Method 1664
Solids
SGT -HEM), if
appl.
mo/dd/ r
MG
inches
m /l
mg/1
unit
gal/mo
STORM EVENT CHARACTERISTICS:
Date 10/28/2015
Total Event Precipitation (inches): 1.30
Event Duration (hours): NA (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
Raleigh, 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
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 Permittee)
12 ,8 a
(Dat6)
Form SWU-247, last revised 2/2/2012
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS 000546 SAMPLES COLLECTED DURING CALENDAR YEAR: 2015
(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 COUNTY Gaston
PERSON COLLECTING SAMPLE(S) Staff PHONE NO. (7041829-2350
CERTIFIED LABORATORY(S) Duke Energy of the Carolinas. LLC Lab #248
Shealy Environmental Services NC Lab #329
Part A: Specific Monitoring Requirements
Outfall Date`
No. Sample
Collected
SWO18 111/02/2015
Outfall Date
No. Sample
Collected
SWO18 111/02/2015
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 2.
50050
01027
00400
00530
01022
01092
01097
01002
Total
Total
pH
Solids, Total
Boron, Total
Zinc, Total (as
Antimony,
Arsenic, Total
Flow (if app.)
Rainfall '
Total (as Cr)'
Suspended - =
(as B)
Zn)
Total (as Sb)
as (As)
m /L
m L
.m /L
Concentration
m /L
m /L
m /L
m`/L
MG
inches
SU -
m /L
m /L
m /L
m /L
m /L
N/A
2.88
6.42
120
<0.05 10.014
ng/L
<0.001
<0.001
01012
01027
01034 -
01042 101051
39488
01067
01147
01077
Beryllium,
Cadmium,
Chromium,
Copper, Total
Lead, Total
Nickel, Total
Selenium,
Silver, Total
Total (as Be)
Total'(as Cd) .
Total (as Cr)'
(as Cu),.
(as Pb)
(as Ni)
Total (as Se)
(as Ag)
m /L
m L
.m /L
m /L
m /L
m /L
m /L
m`/L
<0.001
I <0.001 10.00434
10.00959
10.00191
10.00308
0.00184<0.0003
SU
Outfall Date -
No. Sample
01059
.71900
34671 '
39488
39492' ,
39496
39500
39504
39508
00556
Thallium,
Mercury,
PCB -1016
PCB -1221
PCB -1232
PCB -1242
PCB -1248
PCB -1254
PCB -1260
Oil &
Collected
Total (as Tl)
Total, Method
Zn)
Total (as Sb)
as (As)
Grease
1631E
mo/dd/ r
I MG
linches
SU
m /L
m /L
m /L
mo/dd/yr
mg/L
ng/L
µg/L
µg/L
µg2
µg2
µgI
µg2
µg2
mg/L
SWO18 11/02/2015
<0.0002
11.85
<0.4
<0.4
<0.4
<0.4
<0.4
<0.4
<0.4
<4
Outfall Date
50050
00400
00530
01022
01092
01097
01002
No. Sample
Total
Total
pH
Solids, Total
Boron, Total .
-Zinc, Total (as
Antimony,
Arsenic, Total
Collected
Flow (if app.)
Rainfall
Suspended-
(as B)
Zn)
Total (as Sb)
as (As)
Concentration,
mo/dd/ r
I MG
linches
SU
m /L
m /L
m /L
m /L
m /L
SWO01 11/02/2015
1 N/A 12.88
16.48
17
<0.050
0.106
<0.001
<0.001
Form SWU-247, last revised 21212012
Page 1 of 4

Outfall Date
01012
01027
01034
01042
01051
01067
01147 01077
No. Sample
Collected
Beryllium,
Total (as Be)
Cadmium,
Total (as Cd)
Chromium,
Total (as Cr)
Copper, Total
(as Cu)
Lead, Total
(as Pb)
Nickel, Total
(as Ni)
Selenium,
Total (as Se)
Silver, Total
(as Ag)
mo/dd/ r
SW001 111/02/2015
m /L
1 <0.001
m /L
<0.001 10.00228
m /L
m /L
10.00662 10.00159
m /L
10.00178
m /L
m /L
<0.001
m /L
m /L
<0.0003
Outfall Date
No. Sample
Collected
SW001 111/02/2015
Outfall Date
No. Sample
Collected
SW003 111/02/2015
Outfall Date
No. Sample
Collected
SW003 111/02/2015
01059
71900
00400
00530
01022
01092
01097
01077
01002
Total
Flow (if app.)
MG
N/A 12.88
Thallium,
Total (as Tl)
m /L
Mercury,
Total, Method
1631E
n /L
Solids, Total
Suspended-
Concentration
m /L
Boron, Total
(as B)
m /L
10.140 10.011
Zinc, Total (as
Zn)
m /L
Antimony,
Total (as Sb)
m /L
<0.001 10.00216
Arsenic, Total
as (As)
m /L
Total (as Cr)
(as Cu)
<0.0002 115.7
(as Ni)
Total (as Se)
(as Ag)
m /L
m /L
m /L
m /L
m /L
50050
01027
00400
00530
01022
01092
01097
01077
01002
Total
Flow (if app.)
MG
N/A 12.88
Total
Rainfall
linches
17.24
pH
SU
114
Solids, Total
Suspended-
Concentration
m /L
Boron, Total
(as B)
m /L
10.140 10.011
Zinc, Total (as
Zn)
m /L
Antimony,
Total (as Sb)
m /L
<0.001 10.00216
Arsenic, Total
as (As)
m /L
01012
01027
01034
01042
01051
01067
01147
01077
Beryllium,
Cadmium,
Chromium,
Copper, Total
Lead, Total
Nickel, Total
Selenium,
Silver, Total
Total (as Be)
Total (as Cd)
Total (as Cr)
(as Cu)
(as Pb)
(as Ni)
Total (as Se)
(as Ag)
m /L
m /L
m /L
m /L
m /L
m /L
m /L
m /L
<0.001
<0.001
<0.001
10.00318
<0.001
<0.001
10.00297
<0.0003
Outfall Date
No. Sample
Collected
01059
71900
00530
01022
0109201097
Thallium,
Total (as Tl)
Mercury,
Total, Method
1631E
Total
pH
Solids, Total
Boron, Total
mo/dd/ r
m /L
n /L
Flow (if app.)
Rainfall
Suspended-
SW003 11/02/2015
<0.0002
4.49
as (As)
Outfall Date
No. Sample
Collected
mo/dd/ r
SW016 11/02/2015
50050
00400
00530
01022
0109201097
01002
Total
Total
pH
Solids, Total
Boron, Total
Zinc, Total (as
Antimony,
Arsenic, Total
Flow (if app.)
Rainfall
Suspended-
(as B)
Zn)
Total (as Sb)
as (As)
Concentration
MG
inches
SU
m /L
I m /L
m /L
mg/1L
m /L
N/A 12.88
16.6
128
1 <0.05
10.022
<0.001 10.00153
Form SWU-247, last revised 2/2/2012
Page 2 of 4

Outfall Date
01012
01027
01034
01042
01051
A1067
01147
01077
No. Sample
Beryllium,
Cadmium;
Chromium,
Copper, Total
Lead, Tota_ 1
Nickel, Total
Selenium,
Silver, Total
Collected
Total (as Be)
Total (as Cd) ,
Total (as Cr)`
(as Cu)
(as Pb)
(as Ni)
Total (as Se)
(as Ag)
mo/dd/ r
m /L
m /L
m /L
m /L
m /L
m /L
m /Lm
/L
SW016 11/02/2015
<0.001
<0.001
0.00173
0.00368
<0.001
0.00154
<0.001
<0.0003
Outfall Date
No. Sample
01059
71900
Thallium,
Mercury,
Collected
Total (as Tl).
Total, Method
1631E
mo/dd/ r
m /L
n /L
SW016 11/02/2015
<0.0002
18.87
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 Monitorin Requirements
Outfall Date 50050 00556- 00530 00400
No. Sample Total Flow Total Oil & Grease Non=polar Total pH
Collected (if applicable) Rainfall (if appl.) O&G/TPH Suspended
(Method 1664 Solids
SGT -HEM), if
MG I inches
Exceedances include TSS at SW018 and Hg at SW001
STORM EVENT CHARACTERISTICS:
Date 11/02/2015
Total Event Precipitation (inches): 2.88
Event Duration (hours): NA (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.)
unit
New Motor
Oil Usage
Mail Original and one copy to:
Division of Water Quality
Attn: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Form SWU-247, last revised 21212012
Page 3 of 4

"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."
& :x P.,--" J 1 ahX01 S -
(Signature of Permittee) (Date)
Form SWU-247, last revised 21212012
Page 4 of 4