NCS000549_MONITORING INFO_20191220

STORMWATER DIVISION CODING SHEET
NCS PERMITS
PERMIT NO.
n/L � 0I/��%�'I Cl
DOC TYPE
❑FINAL PERMIT
L'( MONITORING REPORTS
❑ APPLICATION
❑ COMPLIANCE
❑ OTHER
DOC DATE
❑ �U I �l �� �
YYYYMMDD

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DUKE
ENERGY
December 18, 2019
DEC 2 Q 2019
Division of Water Resources
Attention: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Duke Energy Carolinas, LLC
NPDES Stormwater Discharge Monitoring Report for:
Riverbend Steam Station — NCS000549 — Gaston County
Environmental Services
Duke Energy
Riverbend Steam Station
175 Steam Plant Rd.
Charlotte. NC 28120
In accordance with Part III, E(2) of the above referenced NPDES Stormwater permit, the original
and one copy of the monitoring report for November 2019 is attached.
Sample results above the benchmark values for analytical monitoring are listed below. Duke
Energy continues to implement corrective actions as required by the Tier status at these
outfalls. Please direct any correspondence or questions concerning the Riverbend Steam
Station NPDES Stormwater Program to Brad Loveland at [phone].
Parameter
Benchmark
SW011
Zn
0.126 mg/L
0.138 mg/L
Sincerely,
Tim S. Hill
General Manager
CCP Regional Operations & Maintenance
Attachment

STORNIWATER DISCHARGE OUTFALL (SDO)
NIONITORING REPORT
Permit Number NCS000549
FACILITY NAME Riverbend Steam Station
PERSON COLLECTING SAMPLE(S) Peter Dav/Marvin kNialdonado
CERTIFIED LABORATORY(S) Duke Energv Carolinas, LLC NC Lab #248
Shealv Environmental Services Inc. NC Lab #329
Part A: Specific Monitoring Requirements
SAMPLES 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
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/ddl yr
NIG
inches
m L
mgfL
m L
m L
m
SW002
11/12/19
N/A
0.44
7.4
<0.0002
<0.001
<0.05
<0.001
<0.00I
SW003
11/12/19
N/A
0.44
7.3
<U.01)02
<[lmI
<0.[15
<0.001
<{1.001
SWO04
NIA
N/A
NO QUALIFYING FLOW FOR THE MONTH
OF NOVEINIBER
2019
SW[106
11/12/19
NIA
0.44 17.1
SWO10
N/A
N/A
NO QUALIFYING FLOW FOR THE MONTH
OF NOVEMBER 2019
SW011
11/12/19
N/A
0.44
17.3
-
SWI118
11/12/19
N/A
0.44
7.2
-
Outfall
No.
Date
Sample
Collected
(11034
01042
01067
01051
OI097
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
MgL
m L
m L
m L
m L
m L
m L
SW002
11/12/19
<0.001
0.00202
<0.00I
<0.00I
<0.001
0.00141
<0.0002
0.030
SW003
11/12/19
<0.001
0.00510
<0.001
<0.001
<0.001
<0.001
<0.0002
[1.044
SWO04
N/A
NO QUALIFYING FLOW FOR THE ,MONTH OF NOVEMBER
2019
SW006
11/12/19
- -
SW010
NIA
NO QUALIFYING FLOW FOR THE NIONTH OF NOVEi14BER 2019
SWOI1
11/12/19
1 <0.005
-
0.138
Swo18
11/12/19
1
-
-
Permit Number NCS000549 Form SWU-247. last revised 2/2/2012
Page I of 3

Outfall
No.
Date
Sample
Collected
71900
CO530
00556
Mercury, Total, Method
1631E
Solids, Total
Suspended -
Concentration
Oil & Grease
mo/dd/ yr
n L
m L
m L
SW002
11/12/19
1.28 Avg.
<2.8
<5.0
SNVO03
11/12/19
3.68
111
<5.0
SW004
NIA
NO QUALIFYING FLOW FOR THE MONTH OF
NOVEMBER 2019
SNV006
11/12/19
- 1 <2.8
1 <5.0
SW010
NIA
NO QUALIFYING FLOW FOR THE MONTH OF
NOVEMBER 2019
SW011
11/12/19
1 <2.7
<5.0
SW018
11/12/19
18.6
<5.0
Outfall
No.
Date
Sample
Collected
Aroclor 1016
Aroclor 1221
Aroclor 1232
Aroclor 1242
Aroclor 1248
Aroclor 1254
Aroclor .1260
mo/dd/ r
u
u
u L
u L
u L
u L
u L
SNVO06
11/12/19
<0.40
<0.40
<0.40
<0.40
<0.40
<0.40
<0.40
Benchmark exceedanccs include Zinc at SWO11.
Avg — Average of primary and duplicate mercury samples fir SWO02 (1.30 ng/L and 1.26 no/L = 1.28 nn/L)
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 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&G/TPH
Suspended
Oil Usage
(Method 1664
Solids
SGT-HEM), if
a I.
mo/dd/ r
MG
inches
m
m
unit
al1mo
Permit Number NCS000549 Form SWU-247. last revised 21212012
Page 2 of-3