HomeMy WebLinkAboutNCS000580_MONITORING INFO_20190424STORMWATER DIVISION CODING SHEET
NCS PERMITS
PERMIT NO.
NL� o
DOC TYPE
❑FINAL PERMIT
�(,MONITORING REPORTS
0 APPLICATION
❑ COMPLIANCE
❑ OTHER
DOC DATE
oc� 01 � D v a y
YYYYMMDD
DUKE
ENERGY,
PROGRESS
File: Mayo 12520-R
NC Department of Environmental Quality
Division of Water Quality
A ENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Mayo Steam Plant
Duke Energy Progress
10660 Boston Road
Roxboro, NC 27574
April 17, 2019
P ECF to y
CEN 1 L FILES
DWR S C-VON
Subject: 15A N. C. Admin. Code 213.0506
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Stormwater Permit NCS000580
Stormwater Discharge OUtfilllS 002, 006A and 010 Monitoring Report
Dear Sir or Madam:
In accordance with Part II1. Section E2 of NPDES Stormwater Permit Number NCS000580, enclosed is
the year 3, period I, 2019 Stormwater Discharge monitoring report for Outfalls 002, 006A and 010 for
Duke Energy Progress, LLC. - NPDES Stormwater Permit Number NCS000580.
L certify, under penalty of law, that this document and all attachments were prepared muter my direction or
supervision in accordance with a system designed to assure that gtralifted persotrtrel properly gather and evaluate
the information submitted. Based on my inquire 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 ant aware that there are sigrtificttrrt pentrlties for'srrbrrrrttrrrg jCilse infornmtiotr,
including the possibility of fines and inrprisonrnent for knowing violatinns.
Please contact Ms. Lori Tollie at (336) 854-4916 if there are any questions concerning the data in this
submittal.
Sincerely,
Tom Copolo- Manager
Mayo Electric Generating Plant
Enclosures
LPW/Ipw
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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. (336) 597-7398
SIGNATURE OF PERMITTEE OR DESIGNEE
REQUIRED ON PAGE 3.
Outfall
No.
Date
Sample Collected,'
00400
01119
00981
71901
01092
00530
Total
Rainfal14
pH'
Copper'
Total
Selenium
Total
Mercury
Total
Zinc'
Total
TSS
Non -Polar
Oil & Grease
mo/dd/vr
inches
Standard
m
m
mgA
m
m
m
Benchmark
6-9
0.010
0.056
NIA'-
0.126
100
15
002
See comments
006A
03/21/19 07:15
1.21
6.15
0.00446
<0.001
0.0000181
0.020
62
<5.0
010
03/21/19 07:45
1.21
6.09
0.00492
<0.001
0.0000291
0.019
150
<5.0
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
TV
mg/l
mg/l
mg/1
mg/l
mg/l
mg/1
mg/l
mg/l
mg/l
mg/l
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
See comments
006A
<0.05
<0.0002
<0.001
<0.001
<0.001
0.00313
0.00194
0.00142
<0.001
<0.0002
O10
<0.05
<0.0002
<0.001
<0.001
<0.001
0.00761
0.00310
0.00316
<0.001
<0.0002
Form SWU-247, last revised 21212012
Page I of 3
Footnotes: Permit # NCS000580 (Part II Page 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.
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.
Footnotes: Permit # NCS000580 ( Part II Pane 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
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 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 Activitv 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/ddh r
1IG
inches
m
mgA
unit
allmo
Form SWU-247, last revised 21212012
Pa,ye 2 of 3
Comments: Footnote 2: Permit # NCS000580 (Part II Page 9 of 15)
• Mercury value for outfall 006A on 03/21/19 was 18.1 ng/l which is over the North Carolina water quality standard for Mercury or 12 ng/l.
• Mercury value for outfall 010 on 03/21/19 was 29.2 ngA which is over the North Carolina water quality standard for Mercury of 12 ng/l.
• Revision made to permit to include new 002. Permit was amended and signed on 3/21/19. There was no rain event from 3/21/19 to 3/31/19 during normal operating
hours.
STORM EVENT CHARACTERISTICS:
Date 03/21/2019
Total Event Precipitation (inches): 1.21
Event Duration (hours): _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."
of Pe
(Date)
Form SWU-247, last revised 2/2/2012
Page 3 of 3