NCS000546 DMR SW (12)

8 December 2015
Allen Steam Station
Duke Energy
253 Plant Allen Rd.
Belmont, NC 28012
In accordance with Part III, E(2) of the above referenced NPDES stormwater permit, the original
and one copy of the monthly monitoring reports Year 1 — Period 2 are attached. The period for
sampling ends on December 31, 2015.
On 27-28 October and 2 November 2015, samples were collected from stormwater outfalls
SW001, SW002, SW003, SW008, SW009, SW011, SW012, SW015, SW016, SW018, and
SW020. The laboratory results were received on 13 November 2015. On 6 October 2015, an oil
and grease sample was collected at NPDES outfall 004 (same outfall as SW011) as part of the
quarterly sampled required by the Allen Steam Station NPDES wastewater permit
(NC0004979). Both stormwater and applicable wastewater results are included in this submittal.
Parameters that exceeded benchmark values are given in the table below. Duke Energy has
performed the required tier one steps for these outfalls.
Outfall
FRECEIVED)
NC Department of Environmental Quality
DEC 112015
Attention: Central Files
Zinc
Division of Water Resources
CENTRAL FILES
1617 Mail Service Center
DWR SECTION
Raleigh, NC 27699-1617
100 mg/L
Subject: Duke Energy Carolinas, LLC
TSS
NPDES Stormwater DisS-scl, rge, Monitoring Report for:
Allen Steam Station — NO�b�0'n& Gaston County
Allen Steam Station
Duke Energy
253 Plant Allen Rd.
Belmont, NC 28012
In accordance with Part III, E(2) of the above referenced NPDES stormwater permit, the original
and one copy of the monthly monitoring reports Year 1 — Period 2 are attached. The period for
sampling ends on December 31, 2015.
On 27-28 October and 2 November 2015, samples were collected from stormwater outfalls
SW001, SW002, SW003, SW008, SW009, SW011, SW012, SW015, SW016, SW018, and
SW020. The laboratory results were received on 13 November 2015. On 6 October 2015, an oil
and grease sample was collected at NPDES outfall 004 (same outfall as SW011) as part of the
quarterly sampled required by the Allen Steam Station NPDES wastewater permit
(NC0004979). Both stormwater and applicable wastewater results are included in this submittal.
Parameters that exceeded benchmark values are given in the table below. Duke Energy has
performed the required tier one steps for these outfalls.
Outfall
Parameter
Result
Benchmark
SW009
Zinc
0.178 mg/L
0.126 mg/L
SW018
TSS
120 mg/L
100 mg/L
SW020
TSS
150 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
stormwater 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 9349 9713

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
PERSON COLLECTING SAMPLE(S) Staff
CERTIFIED LABORATORY(S) Duke Energy of the Carolinas, LLC Lab #248
Shealy Environmental Services, NC Lab 0329
Part A: Specific Monitoring Requirements
COUNTY Gaston
PHONE NO. [phone]
SIGNATURE OF PERMITTEE OR DESIGNEE
REOUIRED'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
m /L
Collected .
Flow (if app.)
Rainfall
m /L
Suspended-
' (as B) '
Zn)
Total (as Sb)
as (As)
<0.001
0.00441
<0.001
<0.001
<0.001
Concentration
<0.4
<0.4
<0.4
<0.4
<0.4
mo/dd/ r
MG
inches
SU
m /L
m /L
m /L
m /L
m /L
SWO11
10/27/15
N/A
0.5 16.30
15.0
0.052
0.008
<0.001
<0.001
Outfall Date
01012
01027
01034
01042 1 1
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
m /L
m /L
m /L
m /L
In /L
m /L
m /L
Ing /L
SW011 10/27/15
<0.001
<0.001
<0.001
0.00441
<0.001
<0.001
<0.001
<0.0003
Outfall Date
01059
71900
34671
39488
39492_
39496,
39500
39504
39508.
00556
No. Sample
Collected
Thallium,
Total (as Tl),
Mercury,
Total, Method
1631E
PCB -1016
PCB -1221
PCB -1232'
PCB -1242
PCB -1248
PCB -1254
PCB -1260
Oil `&
Grease
mo/dd/yr
mg/L
ng/L
µg2,
µg/L
µl /L
µg2
Rg/L
I µg/L
µg/L
I mg/L
SWO11 10/27/15
<0.0002
0.912
<0.4
<0.4
<0.4
<0.4
<0.4
1 <0.4
<0.4
1 <4
Outfall Date
50050
00400.
00530 .
01022
-01092`
01097 -
01002
No. Sample
Collected
Total
Flow (if app.)
Total
Rainfall
pH
Solids, Total
Suspended-
Concentration
Boron, Total
(as B)
.Zinc, Total (as
� Zn)
Antimony,
Total (as Sb)
Arsenic, Total
as (As)
mo/dd/ r
MG
inches
SU
m /L
m /L
m /L
m /L
m /L
SW012 10/27/15 1
N/A
10.5
6.25
1<5
10.050 10.015
<0.001
<0.001
Form SWU-247, last revised 2/2/2012
Page 1 of 4

Outfall Date
01012
01027
01034
01042
01051
01067
01147
01077
No. Sample
Beryllium,
Cadmium,
Chromium,
Copper, Total
Lead, Total
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 /L
m /L
SW012 10/27/15
<0.001
<0.001
<0.001
0.00536
<0.001
<0.001
<0.001
<0.0003
Outfall Date
No. Sample
Collected
SW012 110/27/15
Outfall Date
No. Sample
Collected
SW008 110/27/15
Outfall Date
No. Sample
Collected
SW008 110/27/15
01059
71900
34671
39488
3949239496
01002
39500
39504
39508
00556
Thallium,
Mercury,
PCB -1016
PCB -1221
PCB -1232
PCB -1242
PCB -1248
PCB -1254
PCB -1260
Oil &
Total (as TI)
Total, Method
Total (as Se)
(as Ag)
SU
m /L
m /L
m /L
m /L
Grease
6.8 129
1631E
<0.05
0.039
<0.001
0.00116
0.00107
0.00228 10.00160
<0.0003
mg/L
ng/L
µg/L
µg/L
µg/L
IAg/L
119 1
µg/L
pg/L
mg/L
<0.0002
0.964
<0.4
<0.4
<0.4
<0.4 1
<0.4 1
<0.4
<0.4
<4
50050
Total
Total
Flow (if app.)
Rainfall
01097
01002
MG
inches
N/A
0.5
00400
00530
01022
01092
01097
01002
pH
Solids, Total
Boron, Total
Zinc, Total (as
Antimony,
Arsenic, Total
Lead, Total
Suspended-
(as B)
Zn)
Total (as Sb)
as (As)
Total (as Cr)
Concentration
(as Pb)
(as Ni)
Total (as Se)
(as Ag)
SU
m /L
m /L
m /L
m /L
rn /L
6.8 129
m /L
<0.05
0.039
<0.001
0.00116
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
I m /L
m /L
<0.001
<0.001 10.00138
SW008 10/27/15
0.00478
0.00107
0.00228 10.00160
<0.0003
Outfall Date
No. Sample
01059
71900
00400
00530
01022
01092
Thallium,
Mercury,
No. Sample
Collected
Total
Flow (if app.)
Total
Rainfall
pH
Collected
Total (as Tl)
Total, Method
Antimony,
Total (as Sb)
Arsenic, Total
as (As)
mo/dd/ r
MG
inches
SU
1631E
m /L
m /L
m /L
m /L
mo/dd/ r
m /L
n /L
6.9
5.0
<0.05
0.178
SW008 10/27/15
<0.0002
3.440
Outfall Date
50050
00400
00530
01022
01092
01097
01002
No. Sample
Collected
Total
Flow (if app.)
Total
Rainfall
pH
Solids, Total
Suspended-
Concentration
Boron, Total
(as B)
Zinc, Total (as
Zn)
Antimony,
Total (as Sb)
Arsenic, Total
as (As)
mo/dd/ r
MG
inches
SU
m /L
m /L
m /L
m /L
m /L
SW009 10/27/15
N/A
0.5
6.9
5.0
<0.05
0.178
<0.001
0.00152
Form SWU-247, last revised 2/2/2012
Page 2 of 4

Outfall Date
01012
01027
01034
01042
01051
01067
01147
01077
No. Sample
Beryllium,
Cadmium,
Chromium,
Copper, Total
Lead, Total
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
SW009 10/27/15
<0.001
<0.001
<0.001
0.00359
<0.001
0.00111
0.00825
<0.0003
Outfall Date
No. Sample
Collected
01059
71900
00530
01022
01092
01097
Thallium,
Total (as Tl)
Mercury,
Total, Method
1631E
Total
Rainfall
pH
Solids, Total
Suspended-
Concentration
Boron, Total
(as B)
mo/dd/ r
m /L
n /L
MG
N/A
inches
10.5 16.81
SU
1<5
m /L
10.572
SW009 10/27/15
<0.0002
2.455
m /L
OutfallDate
No. Sample
Collected
SW015 110/27/15
Outfall Date
No. Sample
Collected
50050
01027
00400
00530
01022
01092
01097
01002
Total
Flow (if app.)
Total
Rainfall
pH
Solids, Total
Suspended-
Concentration
Boron, Total
(as B)
Zinc, Total (as
Zn)
Antimony,
Total (as Sb)
Arsenic, Total
as (As)
MG
N/A
inches
10.5 16.81
SU
1<5
m /L
10.572
m /L
10.014
m /L
m /L
<0.001 1.00759
m /L
01012
01027
01034
01042
101051
101067
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)
u,auui r m/1 m/L I m/L I m/L m/L m/L m/L m/L
SWO15 10/27/15 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0003
Outfall Date
No. Sample
Collected
01059
71900
00400
00530
Thallium,
Total (as TI)
Mercury,
Total, Method
1631E
No. Sample
Total
Total
pH
mo/dd/ r
m /L
n /L
Collected
Flow (if app.)
SWO15 10/27/15
<0.0002
1.033
Outfall Date
50050
00400
00530
No. Sample
Total
Total
pH
Solids, Total
Collected
Flow (if app.)
Rainfall
Suspended -
Concentration
mo/dd/ r
MG
inches
SU
m /L
SW020 10/27/15
N/A
0.5
n/a 1150
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-2471 last revised 2/2/2012
Page 3 of 4

Part B: Vehicle Maintenance Ac ivity Monitorin Requirements
Outfall Date
No. Sample
50050
00556
00530
00400
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
appl.
mo/dd/ r
MG
inches
mg/1
mg/1
unit
al/mo
Exceedances include Zinc at SWO09 and TSS at SW020
STORM EVENT CHARACTERISTICS:
Date 10/27/2015
Total Event Precipitation (inches): 0.5
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."
Pr
(Signature of Permittee)
L a ao �s
(Date)
Form SWU-247, last revised 2/2/2012
Page 4 of 4

Certificate of Laboratory Analysis Page 5 of 20
This report shall not be reproduced, except In full
Order # J15090307
5k—,�0s`
Site OUTFALL 004
Sample #:
2015030310
Collection Date 06 -Oct -15
10 25 AM
Matrix
NPDES
Analyte
Result Units Qualifiers RDL
DF Method
Analysis Date/Time Analyst
OIL AND GREASE IN WATER - SOLID PHASE EXTRACTION
Oil and Grease
< 5 mg/L 5
1 EPA 16646
10/07/2015 10 30 TJA7067