NCG120101 DMR SW (3)

�� DUKE Mayo Steam Plant
ENERGY® Duke Energy Progress
PROGRESS 10660 Boston Road
Roxboro,NC 27574
File: Mayo 12520-R
FREn
NC Division of Water Resources e� 6/44/2016
ATTENTION: Central Files JUN 2 8 1115
1617 Mail Service CenterA
Raleigh, North Carolina 27699-1617 'l,yf L FILES
HON'
Subject: 15A N. C. Admin. Code 2B .0506
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System(NPDES)Numb1�C ` Oy101
Monofill Stormwater Discharge Outfall Monitoring Report
Dear Sir or Madam:
Please find enclosed the 2016 Jan.-June semi-annual Monofill Stormwater Discharge Monitoring Report
for Permit Number NCG120101, SDO 001, SDO 002 &SDO 003, for Duke Energy Progress, LLC. The
Mayo Electric Generating Plant Monofill became operational November 7, 2014.
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.
Please contact Mr. Shannon Langley at [phone], if there are any questions concerning the data in
this submittal.
Sincerely,
dtv..C64,er--
Enclosures
Tom Copolo-Manager
Mayo Electric Generating Plant
A

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG120000
Date submitted 06/14/2016
CERTIFICATE OF COVERAGE NO. NeG12010.10 SAMPLE COLLECTION YEAR 2016
FACILITY NAME Mayo Steam Plant Monofill SAMPLE PERIOD I X pan-June ❑July-Dec
COUNTY Person or ❑ Monthly1 (month)
PERSON COLLECTING SAMPLES Heath Slade DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
LABORATORY Pace Lab Cert.#667.633,40&12 ❑Zero-flow ['Water Supply DSA
Comments on sample collection or analysis: RECE, X Other Bowes Branch Class C
30`\ Z�16 PLEASE REMEMBER TO SIGN ON THE REVERSE -›
Part A: Stormwater Benchmarks and Monitoring Results CE0 jN RT C-T4QH
❑ No discharge this period?2
Date Sample 24-hour rainfall
Outfall No. 1
Collected amount,
(mo/dd/yr) Inches3 Chemical Oxygen Demand Fecal Coliform Total Suspended Solids
Benchmarks===> - - 120 mg/L 1000 count per 100 mL 100 mg/L
001 05/17/2016 0.90 27.0 2420 15.5
002 05/17/2016 0.90 32.0 2420 13.0
003 05/17/2016 0.90 19.0 2420 44.1
1 Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
2 For sampling periods with no discharge at any single outfall,you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on-site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
"See General Permit text,Table 3, identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
Note: Results must be reported in numerical format. For example,do not report Below Detection Limit, BDL, <PQL, Non-detect, ND,or other similar non-
numerical format. When results are below the applicable limits,they must be reported in the format, "<XX m/L",where XX is the numerical value of the
detection limit, reporting limit, etc. in mg/L. Conversely, where fecal coliform results exceed the dilution upper limit, report the result as">XX".
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit text.
Permit Date: 11/1/2012-10/31/2017 SWU-248, last revised 10/25/2012
Page 1 of 4

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG120000 ,
Date submitted 06/14/2016
CERTIFICATE OF COVERAGE NO. NCG120101 SAMPLE COLLECTION YEAR 2016
FACILITY NAME Mayo Steam Plant Monofill - SAMPLE PERIOD _X Jan-June ❑July-Dec
COUNTY Person or ❑ Monthly1 (month)
PERSON COLLECTING SAMPLES Heath Slade DISCHARGING TO CLASS ❑ORW ❑HQW ['Trout ❑PNA
LABORATORY Pace Lab Cert.# 667,633,40&12 ❑Zero-flow ❑Water Supply EISA
Comments on sample collection or analysis: X Other Bowes Branch Class C
PLEASE REMEMBER TO SIGN ON THE REVERSE 4
Part A: Stormwater Benchmarks and Monitoring Results
No discharge this period?'
Date Sample 24-hour rainfall
Outfall No. 1
Collected amount,
(mo/dd/yr) Inches3 Arsenic Selenium Boron
Benchmarks===> - - mg/L ' mg/L mg/L
001 05/17/2016 0.90 0.0025 0.00094 0.396
002 05/17/2016 0.90 0.00066 <0.00031 0.0304
003 05/17/2016 0.90 0.0042 0.00056 0.071
1 Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
2 For sampling periods with no discharge at any single outfall,you must still submit this discharge monitoring report with a checkmark here.
3The total precipitation must be recorded using data from an on-site rain gauge. Unattended sites may be eligible for a waiver of the rain gauge requirement.
4 See General Permit text,Table 3, identifying the especially sensitive receiving water classifications where the more protective benchmark applies.
Note: Results must be reported in numerical format. For example,do not report Below Detection Limit, BDL,<PQL, Non-detect, ND,or other similar non-
numerical format. When results are below the applicable limits,they must be reported in the format, "<XX mg/L",where XX is the numerical value of the
detection limit, reporting limit, etc. in mg/L. Conversely,where fecal coliform results exceed the dilution upper limit, report the result as'">XX".
Note: If you report a sample value in excess of the benchmark, you must implement Tier 1, Tier 2, or Tier 3 responses. See General Permit text.
Permit Date: 11/1/2012-10/31/2017 SWU-248,last revised 10/25/2012
Page 2 of 4