NCS000580_MONITORING INFO_20191101

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STORMWATER DIVISION CODING SHEET
NCS PERMITS
PERMIT NO.
1 v C S v0
f
DOC TYPE
❑FINAL PERMIT
MONITORING REPORTS
O APPLICATION
❑ COMPLIANCE
❑ OTHER
DOC DATE
I V I I U
❑Q0
YYYYMMDD

`tc)D�KEEERGY,
PROGRESS
File: Mayo 12520-R
NC Department of Environmental Quality
Divi •ion of Water Quality
A ENTION: Central Files
161 Mail Service Center
Raleigh, North Carolina 27699-1617
October 28, 2019
Mayo Steam Plant
Duke Energy Progress
10660 Boston Road
Roxboro, NC 27574
Subject: 15A N. C. Admin. Code 213.0506 D
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Stormwater Permit NCS000580
Stormwater Discharge Outfalls 002 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, September 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 September during normal business hours.
I certify, raider penalty of law, that this docu»tent and till ottachrrients were prepared itnder my direction or
supervision in accordance titith a system designed to assure that grutlified personnel properly gather and evaluate
the information submitted. Based on lily inquiry of the person or persons who manage the sysreni, or those persons
directly responsible forgathering the information, the information submitted is, to the best of my knowledge crud
belief, trite, accurate, and complete. I can 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
LPWIIpw

STORMWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number: NCS000580 SAMPLES COLLECTED DURING CALENDAR YEAR: 2019
(This monitoring report shall he 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]
FSIGNATURE OF PERMITTEE OR DESIGNEE
UIREU ON PAGE 3.
Outfall
No.
Date
Sample Collected
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
Standard
MgA
m
MgA
mg1l
m
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
01118
01074
01114
01268
00982
No.
Boron'
Ag'
As
Be
Cd'
Cr'
Ni'
Pb'
Sb
Tl'
mg/I
mg/I
mg/I
mg/I
mg/I
mg/1
mg/I
mg/I
mg/1
mg/I
Benchmark
N/A(monitor only)
0.0003
0.34
0.065
0.003
0.9
0.335
0.075
0.09
N/A (monitor only)
002
OI0
Form SWU-247, lust revised 2122012
Page 1 of 3

Footnotes: Permit #_NCS0005_80 (Part II Pate 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/l and a total suspended solids (TSS) concentration of 10 mg/1,
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 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
(i£ 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
moldd/ r
MG
inches
m
mg,11
unit
aUmo
Form SWU-247. last revised 212/2012
Page 2 of 3

Comments:
• Outfall 010: Tier One: No rain events for September during normal business hours.
• Outfall 002: Tier Two: No rain events for September 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 riles
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 UJnittee)
to14aliq
(Date)
Form SWU-247, fast revised 21212012
Page 3 of 3