NCS000580_MONITORING INFO_20191002

71,71-.,o
STORMWATER DIVISION CODING SHEET
NCS PERMITS
PERMIT NO.
(�JLS 0() 0 u
DOC TYPE
0 FINAL PERMIT
MONITORING REPORTS
❑ APPLICATION
❑ COMPLIANCE
❑ OTHER
DOC DATE
90 I "I (0
YYYYMMDD

DUKE
ENERGY®
PROGRESS
File: Mayo 12520-R
NC Department of Enlironmental Quality
Division of Water Qua ity
ATTENTION: Central Files
1617 Mail Service Cen er
Raleigh, North Carolin i 27699-1617
September 27, 2019
E�la �l-V
OCT O'P fi;9
Mayo Steam Plant
Duke Energy Progress
10660 Boston Road
Roxboro, NC 27574
C1=NTR,� ... 1-ES
DLJRc1 :�T'IC:�'''
Subject: 15A N. C. Admin. Code 213.0506
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Stonnwater Permit NCS000580
Stonnwater Discharge Outfalls 002, 006A and 010 Monitoring Report
Dear Sir or Madam:
In accordance with Part III. Section E2 of NPDES Stormwater Permit Number NCS000580, enclosed is
the year 3, August 2019 Stormwater Discharge monitoring report for Outfalls 002 and 010 for Duke
Energy Progress, LLC. - NPDES Stormwater Permit Number NCS000580. To note, Outfalls 002 and 010
are in tiered status and there were no rain events for August during normal business hours.
I certify-, under penalq of law, that this docuunent and all attachments were prepared under my direction or
supervision in accordance with a system desigrned to assure that qualified personnel properly
gather and evaluate
the information submitted. fused on m'y inquiry of the person or persons rvho manage the system, or those persons
directly responsible for ��athering the information, the infin-mation submitted is, to the best 4my knowledge and
belief; true, accurate, and complete. 1 am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.
Please contact Ms. Lori Tollie at [phone] if there are any questions concerning the data in this
submittal.
Sincerely,
Tom Copolo- Manager
Mayo Electric Generating Plant
Enclosures
LPW/Ipw

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number: NCS000580 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.)
FACILITY NAME Mayo Electric Steam Plant
PERSON COLLECTING SAMPLE(S) Joseph Heath Slade
CERTIFIED LABORATORY(S) Duke, Shealy Lab# 248 & 329
Mayo Plant Lab Lab #_5064_
Part A: Specific Monitoring Requirements
COUNTY Person
PHONE NO. [phone]
SIGNATURE OF PERM ITTEE OR DESIGNEE
REQUIRED ON PAGE 3.
Outfall
'No.
Date 1
Sample Collected i
'00400
39516
01119
00981
71901
01092 -
00530
Total
Rainfall'.
pH;
PCBs
Copper'
Total-
Selenium
Total
Mercury
Total
= Zinc
-Total
TSS
Non=Polar
Oil & Grease
mo/dd/ r
inches
I Standard
99A
m
m
m
m
MgA
m
Benchmark
6-9.
Detected
0.010
0.056
N/A'
0.126
100
15
002
NO FLOW
See
Comments
010
NO FLOW
See
Comments
Outfall
Additional Priority Pollutant Metals'
00999
01079
00978
00998
01113
011t8
01074
01114
01268
00982
No.
Boron
Ag'
As
Be
Cd'
Cr'
Ni'
Pb'
Sb
TV-
mg/1
mg/l
mg/1
mg/l
mg/l
mg/l
mg/l
Eng/I
mg/1
mg/1
Benchmark
N/A(monitor only)
0.0003
0.34
0.065
0.003
0.9
0.335
0.075
0.09
NIA (monitor only)
002
010
Form SWU-247, last revised 21212012
Page I of 3

Footnotes: Permit # NCSOOOS80N(Part II Paae 7 of 15)
4. For each sampled measureable storm event, the total precipitation must be recorded. An on -site rain gauge
is required. Where isolated sites are unmanned for extended periods of time, a local rain gauge reading
may be substituted for an on -site reading.
5. These parameters shall be monitored only if coal or coal ash is transported through the drainage
areas of these outfalls during the semi-annual monitoring period in Table 2.
Footnotes: Permit # NCS000580 ( Part II Page 9 of 15 )
1. Hardness- dependent. Benchmark based on translation of dissolved value into total recoverable with
an assumed hardness of 25 mg/I and a total suspended solids (TSS) concentration of 10 mg/I.
2. Values above the North Carolina water quality standard for mercury (12 ng/1) should be noted on the
DMR but do not trigger Tier responses. Concentrations infield blanks or method blanks associated
with the sample may be subtracted from the results for that sample, as long as all documentation of the
adjustment is provided with the DMR.
3. If pH values outside this range are recorded in sampled stormwater discharges, but ambient
precipitation pH levels are lower, then the lower threshold of this benchmark range is the pH of the
precipitation (within instrument accuracy) instead of 6 S.U. Readings from an on -site or local rain
gauge (or local precipitation data) must be documented to demonstrate background concentrations
were below the benchmark pH range of 6- 9.
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
No.
Date
Sample
Collected
50050
00556
00530
00400
Total Flow
(if applicable)
Total
Rainfall
Oil & Grease
(if appl.)
Non -polar
O&G/TPH -
(Method 1664
SGT-HEM), if
appl.
Total
Suspended
Solids
pH -
New Motor
Oil Usage
mo/dd/ r
MG
inches
MO
mgA
unit
gaurno
Form SWU-247, last revised 21212012
Page 2 of 3

Comments:
• Outfall 0111: Tier One: No rain events for August during normal business hours.
• Outfall 002: Tier Two: No rain events for August during normal business hours.
STORM EVENT CHARACTERISTICS:
Date
Total Event Precipitation (inches):
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
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
t
_ O4�e'1 f ti
(Date)
Form SWU-247, last revised 21212012
Page 3 of 3

T fe DUKE
ENERGYe
PROGRESS
File: Mayo 12520-R
NC Department of Environmental Quality
Division of Water Quality
August 27, 2019
Mayo Steam Plant
Duke Energy Progress
10660 Boston Roar!
Roxboro, NC 27574
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617 'SEP
a-3 zags
r1c
,E
Subject: 15A N. C. Admin. Code 2B CE'iTR,gt, .0506 D� ��C1,;ILE5
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Stormwater Permit NCS000580
Stormwater Discharge OutfalIs 002, 006A and 010 Monitoring Report
Dear Sir or Madam:
In accordance with Part III. Section E2 of NPDES Stormwater Permit Number NCS000580, enclosed is
the year 3, July 2019 Stormwater Discharge monitoring report for Outfalls 002, 006A and 010 for Duke
Energy Progress, LLC. - NPDES Stormwater Permit Number NCS000580.
1 certify, under penalty of law, that this docurncrrt and all attachments were prepared raider nry direction or
supervision in accordance with a systear designed to assure drat qualified personnel properly �>ather and evaluate
the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons
directly responsible forgathering the information, the information submitted is, to the best of my knowledge and
belief, true, accurate, card complete. 1 am aware that there are, significant penalties for submitting false infonnatinn,
including the possibility of fares and imprisonment for knowing violations.
Please contact Ms. Lori Tollie at [phone] if there are any questions concerning the data in this
Submittal.
Sincerely,
Tom Copolo- Manager
Mayo Electric Generating Plant
Enclosures
LPW/Ipw

STORM WATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number: NCS000580 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.)
FACILITY NAME Mayo Electric Steam Plant
PERSON COLLECTING SAMPLE(S) Joseph Heath Slade
CERTIFIED LABORATORY(S) Duke, Shealy Lab# 248 & 329
_iMayo Plant Lab Lab #_5064_
Part A: Specific Monitoring Requirements
COUNTY Person
PHONE NO. [phone]
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 3.
Outfall
No.
Date +
Sample Collected
00400
39516
01119
00981
71901
01092-'
00530,
Total
Rainfa114
pH'
PCBs
Copper'
Total
Selenium
Total
iVlercury-
Total
Zino
Total
TSS
Non -Polar .
Oil & Grease
mo/dd/ r
inches
Standard
RgA
m
m
m
m
m
m
Benchmark
6-9
Detected
0.010
0.056
NIA'
0.126
100
15
002
07/23/19 @ 13:46
2.03
6.53
<0.40
0.0144
<0.001
0.0000143
0.018
237
<5.0
006A
07/23/19 @ 11:55
2.03
6.47
0.00459
<0.001
0.00000855
0.007
5
<5.0
010
07/23/19 @ 10:15
2.03
6.33
0.0153
<0.001
0.0000416
0.028
324
<5.0
Outfall
Additional Priority Pollutant Metals'
00999
01079
00978
00998
(11113
01118
01074
01114
01268
00982
No.
Boron'
Ag'
As
Be "
Cd'
Cr'
Ni'
Ph'
Sb
TV
mg/I
mg/I
mg/l
mg/I
mg/I
mg/I
mg/I
mg/I
mg/I
mg/)
Benchmark
N/A(monitor only)
0.0003
0.34
1 0,065
0.003
0.9
0.335
0.075
0.09
N/A (monitor only)
002
<0.05
<0.0002
<0.001
<0.001
<0.001
0.0155
0.00718
0.0038
<0.001
<0.0002
t106A
<0.05
<0.0002
<0.001
<0.001
<0.001
<0.001
0.00138
<0.001
<0.001
<0.0002
010
<0.05
<0.0002
0.00109
<0.001
<0.001
0.0221
0.01 t3
0.00838
<0.005
1 <0.0002
Form SWU-247, lass revised 22/2012
Page 1 of 3

Footnotes: Permit # NCS000580 (Part II Paae 7 of 15)
4. For each sampled measureable storm event, the total precipitation must be recorded. An on -site rain gauge
is required. Where isolated sites are unmanned for extended periods of time, a local rain gauge reading
may be substituted for an on -site reading.
5. These parameters shall be monitored only if coal or coal ash is transported through the drainage
areas of these outfalls during the semi-annual monitoring period in Table 2.
Footnotes: Permit # NC5000580 (Part Ih Page 9 o1 15 )
1. Hardness- dependent. Benchmark based on translation of dissolved value into total recoverable with
an assumed hardness of 25 mg/I and a total suspended solids (TSS) concentration of 10 mg/l.
2. Values above the North Carolina water quality standard for mercury (12 ng/1) should be noted on the
DM R but do not trigger Tier responses. Concentrations infield blanks or method blanks associated
with the sample may be subtracted from the results for thatsample, as long as all documentation of the
adjustment is provided with the DMR.
3. If pH values outside this range are recorded in sampled stormwater discharges, but ambient
precipitation pH levels are lower, then the lower threshold of this benchmark range is the pH of the
precipitation (within instrument accuracy) instead of 6 S.U. Readings from an on -site or local rain
gauge (or local precipitation data) must be documented to demonstrate background concentrations
were below the benchmark pH range of 6- 9.
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
No.
Date -
Sample
Collected
50050
00556
00530
00400
Total Flow
(if applicable)
Total
Rainfall
Oil & Grease
(if appl.)
Non -polar
O&G1TPH
(Method 1664
SGT-HEM), if
appl.
Total
Suspended
Solids
pH
New Motor
Oil Usage
mo/dkr
MG
inches
mgA
mgn
unit
aUmo
Form SWU-247. last revised 212!?012
- Page 2 of 3

Comments: Footnote 2: Permit # NCS000580 (Part II Pa,,,e 9 of 15)
• Mercury value for outlall 002 on 07/23119 was 14.3 ng/l which is over the North Carolina water quality standard for Mercury of 12 ng/l_
• Mercury value for outfall 010 on 07/23/169 was 41.6 null which is over the North Carolina water quality standard for Mercury of 12 nu/1.
• Copper values for 002 and 010 were over the benchmark value of 0.010 mg/I.
• TSS values for 002 and 010 were over the benchmark value of 100 mg/l.
• Revision made to permit to include new 002. Permit was amended and signed on 3/21/19.
STORM EVENT CHARACTERISTICS:
Date _06/1812019-06/19/2019
Total Event Precipitation (inches): 2.03
Event Duration (hours): _9.5_ (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."
Forin SWU-247, last revised 21212012
Page 3 of 3

(Signature of
(Date)
Form SWU-247, Iasi revised 21212012
Pa-ce 4 of 3