NCG120101_DMR_20200624

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG120000
Date submitted 6 / _�Lr I Ao �O
CERTIFICATE OF COVERAGE NO. NCG120101
FACILITY NAME Mavo Steam Plant Monofill
COUNTY Person
PERSON COLLECTING SAMPLES Leanne Wilson
LABORATORY Duke. Shealy, Mayo Lab Lab Cert. # Duke: 248, Shealy:
329. Mayo: 5064 Comments on sample collection or analysis: COC:
does not require fecal sampling.
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2020
SAMPLE PERIOD ® Jan -June ❑ July -Dec
or ❑ Monthly' (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
[_]Zero -flow ❑Water Supply ❑SA
® Other Bowes Branch Class C
JUi� 2 6 PLEASE REMEMBER TO SIGN ON THE REVERSE
No discharge this period?2
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches'
Chemical Oxygen Demand
yg
Fecal Coliform
Total Suspended Solids
p
Benchmarks ===>
-
-
120 mg/L
1000 count per 100 mL
100 mg/L
001
5/19/20 @ 11:15
3.86
<20
See Comment
20
002
5/19/20 @11:30
3.86
39
See Comment
16
003
5/19/20 @ 11:48
3.86
<20
See Comment
67
Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
'The 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 me/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: 11/1/2018-05/31/2021 SWU-248, last revised 10/25/2012
Page 1 of 5

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG120000
Date submitted (^. 1 ay I �oac
CERTIFICATE OF COVERAGE NO. NCG120101 SAMPLE COLLECTION YEAR 2020
FACILITY NAME Mayo Steam Plant Monofill SAMPLE PERIOD ® Jan -June ❑ July -Dec
COUNTY Person or ❑ Monthly' (month)
PERSON COLLECTING SAMPLES Leanne Wilson DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
LABORATORY Duke. Shealy, Mayo Lab Lab Cert. # Duke: 248. Shealy: ❑Zero -flow [:]Watersupply [:]SA
329, Mayo: 5064 Comments on sample collection or analysis: ® Other Bowes Branch Class C
Part A: Stormwater Benchmarks and Monitoring Results
PLEASE REMEMBER TO SIGN ON THE REVERSE 4
n No discharge this period?'
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches;
Arsenic
Selenium
Boron
Benchmarks =__>
-
-
mg/L
mg/L
mg/L
001
5/19/20
3.86
<0.001
0.00152
<0.05
002
5/19/20
3.86
0.00104
<0.001
<0.05
003
5/19/20
3.86
0.00256
0.00424
0.121
Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
For sampling periods with no discharge at any single outfall, you must still submit this discharge monitoring report with a checkmark here.
'The 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 mR/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: 11/1/2018-05/31/2021 SWU-248, last revised 10/25/2012
Page 2 of 5

Semi-annual Stormwater Discharge Monitoring Report
for North Carolina Division of Water Quality General Permit No. NCG120000
Date submitted C. LN L�aap
CERTIFICATE OF COVERAGE NO. NCG120101
FACILITY NAME Mavo Steam Plant Monofill
COUNTY Person
PERSON COLLECTING SAMPLES Leanne Wilson
L LABORATORY Duke, Shealy, Mayo Lab Lab Cert. tt Duke: 248, Shealy:
329, Mayo: 5064 Comments on sample collection or analysis:
Part A: Stormwater Benchmarks and Monitoring Results
SAMPLE COLLECTION YEAR 2019
SAMPLE PERIOD ❑ Jan -June ® July -Dec
or ❑ Monthly' (month)
DISCHARGING TO CLASS ❑ORW ❑HQW ❑Trout ❑PNA
❑Zero -flow ❑Water Supply ❑SA
® Other Bowes Branch Class C
PLEASE REMEMBER TO SIGN ON THE REVERSE -->
❑ No discharge this period?'
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches;
pH
Conductivity
Benchmarks ===>
-
-
S.U.
S/m
001
5/19/20
3.86
6.93
1.86
002
5/19/20
3.86
7.12
0.00698
003
5/19/20
3.86
8.58
1.96
' Monthly sampling (instead of semi-annual) must begin with the second consecutive benchmark exceedance for the same parameter at the same outfall.
Z 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 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".
Permit Date: 11/1/2018-05/31/2021 SWU-248, last revised 10/25/2012
Page 3 of 5

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.
Semi-annual Stormwater Discharge Monitoring Report
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.
Part B: Vehicle Maintenance Area Monitoring Results: only for facilities averaging > 55 gal of new oil per month.
❑ No discharge this period?'
Outfall No.
Date Sample
Collected'
(mo/dd/yr)
24-hour rainfall
amount,
Inches3
Non -polar O&G/TPH by
EPA 1664 (SGT-HEM)
Total Suspended Solids
pH
Benchmarks =__>
-
-
15 mg/L
100 mg/L or 50 mg/L4
6.0 — 9.0 SU
Footnotes from Part A also apply to this Part B
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.
FOR PART A AND PART B MONITORING RESULTS:
• A BENCHMARK EXCEEDANCE TRIGGERS TIER 1 REQUIREMENTS. SEE PERMIT PART II SECTION B.
• 2 EXCEEDANCES IN A ROW FOR THE SAME PARAMETER AT THE SAME OUTFALL TRIGGER TIER 2 REQUIREMENTS. SEE PERMIT PART II SECTION B.
• TIER 3: HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES FOR THE SAME PARAMETER AT ANY ONE OUTFALL? YES ❑ NO
IF YES, HAVE YOU CONTACTED THE DWQ REGIONAL OFFICE? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME:
Mail an original and one coov of this DMR, including all "No Discharge" reports, within 30 days of receipt of the lab results (or at end of monitoring period
in the case of "No Discharge" reports) to:
Division of Water Quality
Attn: DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Permit Date: 11/1/2018-05/31/2021 SWU-248, last revised 10/25/2012
Page 4 of 5

Comment:
Outfall 003: pH reading was out of the 6-9 range. Reading was a 9.04. No benchmark applies to this parameter, only requires it to be noted on report.
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED:
"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
06 /24 /ao
(Date)
Permit Date: 11/1/2018-05/31/2021 SWU-248, last revised 10/25/2012
Page 5 of 5