NCS000580_MONITORING INFO_20181220

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STORMWATER DIVISION CODING SHEET
NCS PERMITS
PERMIT NO.
i Vc� 000sw
DOC TYPE
El FINAL PERMIT
LY�MONITORING REPORTS
❑ APPLICATION
❑ COMPLIANCE
❑ OTHER
DOC DATE
❑ DID,
YYYYMMDD

DUKE
ENERGY,
PROGRESS
File: Mayo 12520--R
Datc: 12/1 1/18
Mayo Steam Plant
Duke Energy Progress
10660 Boston Road
Roxboro, NC 27574
NC Division of Environmental Management
Division of Water Quality »..; Wit.
ATTENTION: Central Files giEk � 1
1617 Mail Service Center DEC 2 0 2018
Raleigh, North Carolina 27699-1617
CENTRtQ- FlLC:< ,
Subject: 15A N. C. Admin. Code 2B .0506 UUVrZ Sf:-;TIO�J
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Stormwater Permit NCS000590
Stormwater Discharge Outfalls 006A and 010 Monitoring Report
Dear Sir or Madam:
In accordance with Part III. Section E2 of NPI)ES Stormwater Permit Number NCS000580, enclosed is
the year 2, period 2 , 2018 Storn»vater Discharge monitoring report for OutfalIS 006A and 010 for Duke
Energy Progress, LLC. - NPDES Stormwater Permit Number NCS000580.
1 cerl fjy, under penalt,�� of 1tnv, that this document and all attaclmiews tivere prepared under my direction or
supervision in accordance ivith tr s_ystent designed to assure that qualified personnel properly gather and evahuae
the information submitted. Based on my inquire, of the person or persons who manage the sl'stenr, or those persons
directly responsible for gathering the information, the information submitted is, to the best of m , knotOedge card
belief, true, accurate, and complete. I am wi-are chat there are significant penalties for submitting false information,
including the possibility offines and imprisonment for knowing i,iolutions.
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

STORIIWATER DISCHARGE OUTFALL (SDO)
MONITORING REPORT
Permit Number: NCS000580 SAMPLES COLLECTED DURING CALENDAR YEAR: 2018
(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 NAINIE Mayo Electric Steam Plant
PERSON COLLECTING SAMPLE(S) Joseph Heath Slade
CERTIFIED LABORATORY(S) Pace Lab #_40/503/530
_Mayo 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 '
t
00400
01119
00981
700V
01092
00530
Total
Rainfalls'
pH'
Copper
Total
Selenium
Total'
Mercury
Total-
Zinc
Total,
TSS
Non -Polar.
Oil & Grease
mo/dd/ r ;
inches
I Standard
mgA
m
MO
m
m
m
Benchmark
6-9
0.010
0.056
N/A-
0.126
100
15
010
11/05/2018
1.57
6.20
0.0035
ND<0.00031
0.0000134
0.0082
17.9
ND<1.1
6A
11/05/2018
1.57
6.43
0.0041
ND<0.00031
0.000410909
0.0134
10.0
ND<I.l
Outfall
Additional Priority Pollutant
Metals' .
00999
01079
00978
00998
01113
01118
01074
01114
01268
00982
No.
Boron'
Ag
As
Be
Cd
Cr
Nir
Pb
Sb
TV
mg/1
mg/1
mg/l
mg/1
mg/l
mg/l
mg/l
mg/l
mg/l
mg/I
Benchmark
NIA(monitor only)
0.0003
0.34
0.065
0.003
0.9
0.335
0.075
0.09
N/A(monitor only)
010
0.0117
ND<0.00007
0.00042
0.000082
ND<0.001105
0.0028
0.0019
0.0013
ND<0.0001
ND<0.000015
6A
0.0111
ND<0.00007
0.00029
0.000048
ND<0.00005
0.0016
0.0015
0.00078
ND<0.0001
ND<0.000015
Form SWU-247, last re+,ised 2/2/2012
Page l of 3

Footnotes:"=Perrnit # NCS000580 (Part>ILPage 7 of. 55)
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.
S. 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.
Fo6t6oteT71?erritit"#',NCS0005809of•151
1. Hardness- dependent. Benchmark based on translation of dissolved value into total recoverable with
an assumed hardness of 25 mg/1 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
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
N I G
inches
m
m
unit
gallmo
Form SWU-247. Iasi revised 21212012
Page 2 of 3

Comments: Footnote 2 : Permit # NCS000580 ( Part II Page 9 of 15 ) Mercury value for outfal1 010 on 1 1/05/2018 was 13.4 ng/l which is over the North Carolina
water quality standard for Mercury of 12 ng/l.
STORM EVENT CHARACTERISTICS:
Date _11105/2018
Total Event Precipitation (inches): 1.57
Event Duration (hours): _6_ (only if applicable — see permit.)
(if more than one storm event wits sampled)
Date
Total Event Precipitation (inches):
Event Duration (hours): (only if applicable — see permit.)
Mail Original and one copy to:
Division of Water Quality
Attw 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."
<7- T,
(Signature of
191%� /l%
(Date)
Form SWU-247, last revised 2�2/2012
Pa,e 3 of 3