NCS000546_MONITORING INFO_20190224

M710
STORMWATER DIVISION CODING SHEET
NCS PERMITS
PERMIT NO.
5L11
DOC TYPE
❑FINAL PERMIT
MONITORING REPORTS
❑ APPLICATION
❑ COMPLIANCE
❑ OTHER
DOC
"�u � C� U�c) v
DATE
0
YYYYM MDD

Allen Steam Station
('DUKE
ENERGY.
February 19, 2020
Duke Energy
253 Plant Allen Rd.
Belmont, NC 28012
N.C. Department of Environmental Quality FEB 2 4 2019
Attention: Central Files
Division of Water Resources N;� L FIL&3
1617 Mail Service Center D1Nr'? SECTION
Raleigh, N.C. 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 are attached. The samples collected are
required monthly due to Tier Two or Tier Three Status. The period for sampling ended January
31, 2020. Samples collected for the period were outfalls SW007, SW009, SW010, SW016,
SW018 and SW020. Outfall SWOOI was noted as "No Qualifying Flow" for the period. Samples
were collected on January 24, 2020. The laboratory analysis results were received on February
10, 2020. Duke Energy has performed the steps required by the Tier II and Tier III for these
outfalls.
Samples also collected on January 24, 2020 are as follows, SW002, SW005, SWO08, SWO13-
13 and SW015. Outfall SW013-13 has exceeded the benchmark for Zinc in two consecutive
monitoring periods and will now enter Tier it status and will enter monthly sampling
requirements. Analytes sampled above the benchmark values for analytical monitoring are as
follows.
Outfall
Parameter
Result
Benchmark
SW007
Zinc
0.315 mg/L
0.126 rng/L
SW009
Zinc
0.536 in/L
0.126 mg/L
SW009
Copper
0,0614 mg/t,
0.010 nig L
SW013-13
Zinc
0.146 nig/L
0.126 ma/L
SW020
Copper
0.0 116 mg/L
0.010 mg/L
SW020
TSS
110 mQ/L
100 ma/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 28812
Please direct any correspondence or questions concerning the Allen Steam Station NPDES
Storm Water Program to Robert Wylie [phone].
Yours truly,
Terry Tuck, General Manager 11
Allen Steam Station
Duke Energy Carolinas, LLC
Attachments
bc: wlattachment Robert Wylie
UPS Tracking: 1Z X67 601 24 9023 8310

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number NCS000546
FACILITY NAME Allen Steam Station
PERSON COLLECTING SANIPLE(S) Joshua Sexton/Dan Diffenbach
CERTIFIED LABORATORY(S) Duke Energy Carolinas, LLC NC Lab #248
Shealy Environmental_ Services, Inc. NC Lab #329
Part A: Specific 1lonitorin r Re uirements
SANIPLES COLLECTED DURING CALENDAR YEAR: 2020
(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. 704 860-4945
SIGNATURE OF PERNITITTEE OR DESIGNEE
REQUIRED ON PAGE 3.
Outfall
No.
Date
Sample
Collected-
50050
00404i
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/ r
MG
inches
jrng1L
m L
I m L
I m L
m L
SW001
NIA
N/A
NO QUALIFYING FLOW FOR THE \MONTH
OF JANUARY 2020
SNV002
1/24/20
NIA
0.91
6.9
<0.0002
0.00159
<0.05
<0.001
<0.001
SWO05
1/24/20
NIA
0.91
6.8
<0.0002
0.00192
0.292
<0.001
<0.001
SWO07
1/24/20
NIA
0.91
6.5
<0.0002
<0.001
<0.05
<0.001
<0.001
SWO08
1/24120
N/A
0.91
6.9
<0.0002
<0.001
<0.05
<0.001
<0.001
SW009
1/24/20
N/A
0.91
6.8
<0.0002
0.00164
<0.05
<0.001
<0.001
SW010
1/24/20
NIA
0.91
6.1
<0.0002
0.00221
<0.05
<0.001
<0.001
SWOl3-13
1/24/20
NIA
0.91
7.1
<0.0002
0.00101
<0.05
<0.001
<0.001
SWO15
1/24/20
N/A
0.91
6.8
<0.0002
0.00853
0.378
<0.001
<0.001
S%1`016
1/24/20
NIA
0.91
6.9
<0,0002
<0.001
<0.05
<0.001
<0.001
SWO18
1124/20
NIA
0.91
7.4
<0.0002
<0.001
<0.05
<0,001
<0.00I
SNV020
1/24/21)
NIA
0.91
7.2
<0.0002
0.00107
<0,05
<0.001
<0.001
Outfall
Date
01034
01042
01067
01051
01097
01147
01059
01092
No.
Sample
Collected
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 TI)
Zinc, Total (as
Zn)
mo/dd/ r•
m
m L
m L
rng1L
m L
m L
m L
m
SW001
N/A
NO QUALIFYING FLOW FOR THE ,NIONTH OF JANUARY 2020
SIV002
1/24/20
<0.001
<0.001
<0.001
<0.001
<O.001
<O.00I
1 <0.0002
10.039
SW005
1/24/20
0.00131
0.00610
<0.001
<0.001
<0.001
10,00248
1 <0.0002
10.027
SWO07
1124/20
<0.001
0.00134
<0.001
<0.001
<O,o01
I <0.001
1 <0.0002
10,315
Permit Number NCS000546 Form SWU-247, last revised 22/2012
PasTe I of 3

Outfall
Date
01034
01042
01067
01051
01097
01147
01059
01092
No.
Sample
Collected
Chromium,
Total (as Cr)
Copper, Total
(as Cu)
Nickel, Total
(as NO
Lead, Total
(as Ph)
Antimony,
Total (as Sb)
Selenium,
Total (as Se)
Thallium,
Total (As Tl)
Zinc, Total (as
Zn)
mo/ddl r
m L
m L
m L
m
m
m L
mg/ L
m L
SW11)08
1/24/20
<0.001
0.00224
<0.00I
<0.001
<0.001
0.00128
<0.0002
0.021
SW0119
1/24/20
0.00139
0.0614
0.00556
0.00292
<0.001
0.00456
<0.0002
0.536
SWO10
1124/20
<0.001
0.00200
<0.00I
<0.001
<0.001
0.00465
<0.0002
0.049
SWO 13-13
1/24/20
<0,001
0.00490
0.00106
<0.001
<0.001
<0.001
<0.0002
0.146
SIVO15
1/24/20
<0.001
<0.00I
<4 001
<0.001
<0.001
<0.001
<0.0002
<0.005
SW016
1/24/20
0.00124
0.00206
<0.001
<0.001
<0.001
<0.001
<0.0002
0.097
SW018
1/24/20
<0.001
0.00128
<0.001
<0.001
<0.00I
<0.001
<0.0002
<0.005
SW020
1/24/20
0.00715
0.0116
0.00241
11.00485
<0.001
<0.001
<0.0002
0.066
Outfall
No.
Date
Sample
Collected
71900
C0530
00556
Mercury, Total,
Method 1631 E
Solids, Total
Suspended -
Concentration
Oil & Grease
nio/dd/ r
n L
m L
m L
SW001
N/A
NO QUALIFYING FLOW FOR THE ,MONTH OF JANUARY 2020
SWO02
1/24/20
1.65
11
SW005
1/24120
4.59
43
SWO07
1/24/20
1.25
20
SWO08
1/24/20
2.00
<2.6
SWi109
1/24/20
2.25
5.1
SVVII10
1124/20
1.97 Avg
<2.5
SW013-13
1/24/20
5.76
11
SIVO15
1/24/20
0.949
<2.9
SW016
1/24/20
3.57
7.5
SWO 18
1/24/20
1.35
3.2
<5.0
SW020
1/24/20
22.2
110
Avg - Average of primary and duplicate'mercury samples (2.01 nJL and 1.92 ng/L = 1.97 ng/L).
Benchmark exceedances include Zinc at SW007. SWO09 and SW013-13: TSS at SW020: Copper at SWO09 and SW020.
Note: The Ha result for outfall SW020 was 22.2 ng/L. This H- value is above the 12 na1L North Carolina water
quality standard for mercury and is noted on this DMR but does not trigger a 'Pier response.
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)
Permit Number NCS000546 Form SWU-247. Last revised 2212012
Page 2 or 3

Part It: Vehicle i'1Maintenance Activity 11'Ionitoring 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 1.
mo/dd/ r
MG
inches
m
m
unit
gaUmo
STORM EVENT CHARACTERISTICS: Mail Original and one copy to:
Division of Water Quality
Date 1/24/20 Attn: Central Files
Total Event Precipitation (inches): 0.91 1617 Mail Service Center
Event Duration (hours): (only il' applicahle — sec permit.) Raleigh. North Carolina 27699-1617
(if more than one storm event was sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if 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 are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
(Signature ok Permittee)
T
(Date)
Permit Number NCS000546 Form SWU-247, last revised 2122012
Pagc 3 of 3