NC0024945_Draft Permit_20170531

Water Resource-
VIRONMENTAL QUA[
ROY COOPER
MICHAEL S. REGAN
S. JAY ZIMMERMAN
May 31, 2017
Ms. Jacqueline A. Jarrell
Charlotte Water
5100 Brookshire Blvd
Charlotte, NC 28216-3371
Subject: Draft NPDES Permit Renewal
Permit NCO024945
Irwin Creek WWTP
Mecklenburg County
Class IV Facility
SIC code 4952
Dear Ms. Jarrell:
Enclosed with this letter is a copy of the draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by the
NC Environmental Management Committee (EMC) on November 13, 2014. The US EPA
subsequently approved the WQS revisions on April 6, 2016 with some exceptions. The NC
Division of Water Resources NPDES Permitting Unit is required to implement the new
dissolved metal standards in all permits public noticed after April 6, 2016. The new
standards for most metals include acute standards. Further, the freshwater standards for
several metals are expressed as the dissolved form of the metals, and seven metals have
hardness -dependent equations. As a result, the NPDES Permitting Unit will need site-
specific effluent hardness data and instream hardness data, upstream of the discharge, for
each facility monitoring these metals in order to calculate permit limitations. Effluent
hardness sampling has been added to this permit at a monitoring frequency of quarterly.
See special condition A. (1) Effluent Limitations and Monitoring Requirements for effluent
sampling requirements. Instream hardness sampling, upstream of the discharge at Irwin
Creek station ICI has been added to special condition A. (3) Irwin Creek Instream
Monitoring Requirements in McAlpine Creek WWMF's (NC0024970) permit renewal.
Instream monitoring requirements for Irwin Creek and Sugar Creek have been removed
from this permit to simplify instream monitoring in this permit renewal. Instream
monitoring for these streams will be maintained in the permit renewal for McAlpine Creek
WWMF (NC0024970). All instream monitoring requirements for stations IC1, SCI, SC2,
SC3, SC4, and SC5, will continue to be submitted on McAlpine Creek WWMF's discharge
monitoring reports. See special condition A. (2).
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919 807 6300

Page 12
• As part of the NC 2007-2014 Water Quality Standard (WQS) Triennial Review the total
chromium NC WQS was removed and replaced with trivalent chromium and hexavalent
chromium Water Quality Standards. The reasonable potential analysis using Irwin
Creek's total chromium effluent data showed potential to violate the new hexavalent
chromium standard. Total chromium is made up of hexavalent and trivalent chromium.
As a result, hexavalent chromium limitations were added to this permit in special
condition A. (1) Effluent Limitations and Monitoring Requirements. Sampling for
hexavalent chromium will ascertain if hexavalent chromium is present in the total
chromium samples and thus the effluent. If sampling for hexavalent chromium indicates
that hexavalent chromium is not present (i.e. non-detectable concentrations < 5 gg/L)
after two years of sampling, the limits and monitoring requirements in special condition
A. (1) can be reduced or removed upon request [see A. (1), Footnote 6]. Monitoring for
total chromium has been changed from quarterly to monthly in special condition A. (1),
until hexavalent chromium levels can be assessed.
• Quarterly silver monitoring has been included in section A. (1) and should be sampled at
the Practical Quantitation Limit (PQL) of 1.0 gg/L. This metal is currently reported at
levels less than 5 µg/1 but the permittee is required to report the results at the Practical
Quantitation Limit (PQL).
• The limits for copper have been removed based on the results of the RPA which showed
no reasonable potential to exceed water quality standards. Quarterly monitoring, instead of
monthly monitoring, remains due to the receiving stream's listing for copper impairment
on the 2014 303(d) list.
• A limit and monthly monitoring for cyanide has been included in section A. (1) based the
results of the RPA which showed reasonable potential to exceed water quality standards.
• Quarterly monitoring for total phenolic compounds has been added to this permit based on
the results of the reasonable potential analysis.
• Instream monitoring for zinc at stations ICI, upstream in Irwin Creek, and SC4,
downstream in Sugar Creek, has been removed. Review of instream data shows that
instream values for zinc are consistently below the water quality standard [see special
condition A. (3) and A. (4) in McAlpine Creek WWMF's (NC0024970) permit renewal].
• Footnote 3 in special condition A. (1) has been included regarding the reduction of
monitoring frequencies for CBOD5, TSS, NH3-N, and fecal coliform.
• Special condition A. (7) has been added to require a Mercury Minimization Plan (MMP)
based on the statewide mercury TMDL approved by EPA in 2012.
• Parameter characteristic codes have been added in special condition A. (1).
• An updated outfall map has been included.
• Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs) and program reports. The final NPDES Electronic Reporting Rule was adopted
and became effective on December 21, 2015. The requirement to begin reporting
discharge monitoring data electronically using the NC DWR's Electronic Discharge
Monitoring Report (eDMR) internet application has been added to your final NPDES
permit [see special condition A. (8)].

Page 13
For information on eDMR, registering for eDMR and obtaining an eDMR user account,
please visit the following web page: htth://dN.nc.gov/about/divisions/water-
resources/ednir.
For more information on EPA's final NPDES Electronic Reporting Rule, please visit the
following web site: https://www.federalre,ister. gov/documents/2015/10/22/2015-
24954/national- )ollutant-dischar 7e -elimination -s stem -n des -electronic -re cortin -rule
Please note that the receiving stream is listed as impaired for copper on North Carolina's 303(d)
2014 Impaired Waters List. Addressing impaired waters is a high priority with the Division, and
instream data will continue to be evaluated. If there is noncompliance with permitted effluent limits
and the stream impairment can be attributed to your facility, then mitigative measures may be
required.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Mecklenburg County area, soliciting public comments on this draft
permit. Please provide any written comments you may have to the following: NCDEQ/DWR,
NPDES Permitting Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 no later than 30
days after receipt of this draft permit.
Following the 30 -day public comment period, the Division will review all pertinent comments
and take appropriate action prior to issuing a final permit. If you have questions concerning this
draft permit, please call me at [phone] or by email at [e-mail].
Sincerely,
Jennifer Busam, Environmental Senior Specialist
Compliance and Expedited Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Aquatic Toxicology Branch/Susan Meadows
DWR/ NC Operator Certification Program/Maureen Kinney
DWR/Mooresville Regional Office / Water Quality/Corey Basinger
DWR/PERCS/ Deborah Gore
Mecklenburg County/Richard Farmer
Charlotte Water/Water Quality Program Administrator/Shannon Sypolt

Permit NCO024945
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Charlotte Water
is hereby authorized to discharge wastewater from a facility located at the
Irwin Creek Wastewater Treatment Plant
4000 Westmont Drive
Charlotte
Mecklenburg County
to receiving waters designated as Irwin Creek in the Catawba River Basin in accordance with effluent
limitations, monitoring requirements, and other conditions set forth in Parts I,11, III and IV hereof.
This permit shall become effective
This permit and authorization to discharge shall expire at midnight on May 31, 2022.
Signed this day
DRAFT
S. Jay Zimmerman, P.G.
Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 11

Permit NCO024945
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked, and as of this issuance, any previously issued permit bearing this number is no longer effective.
Therefore, the exclusive authority to operate and discharge from this facility arises under the permit
conditions, requirements, terms, and provisions included herein.
Charlotte Water
is hereby authorized to:
1. Continue operation of a 15.0 MGD wastewater treatment plant with a discharge through outfall 001,
consisting of the following treatment units:
• Mechanical bar screen
• Influent pump station
• Grit removal
• Flow equalization
• Influent flow measurement
• Three primary clarifiers
• pH adjustment
• Aeration basins (diffused air)
• Three secondary clarifiers
• Ten tertiary filters
• Effluent flow measurement
• Ultraviolet disinfection
• Cascade aeration
• Four anaerobic digesters
• Two unmixed secondary digester tanks
• 300,000 gallon sludge storage for WAS
• Two gravity belt thickeners with polymer feed
• 1.8 MG digested sludge storage tank
This facility is located at the Irwin Creek WWTP, 4000 Westmont Drive, Charlotte, in Mecklenburg
County.
2. Discharge from said treatment works via outfall 001, at the location specified on the attached map
into Irwin Creek currently classified C waters in subbasin 03-08-34 [HUC: 0305010301 ] of the
Catawba River Basin.
Page 2 of 11

Permit NCO024945
Part I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS- 15 MGD
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee
is authorized to discharge treated municipal and industrial wastewater from outfall 001. Such discharges
shall be limited and monitored' by the Permittee as specified below:
PARAMETER CHARACTERISTICS
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Weekly
Daily
Measurement
Sample
Sample
Parameter Code
Average
Average
Maximum
Frequency
Type
Location
Flow 50050
15.0 MGD
Continuous
Recording
Influent or Effluent
CBOD5, (20°C) 2 80082
5.0 mg/L
7.5 mg/L
2Meek 3
Composite
Influent and
(April 1 -October 31)
Effluent
CBOD5, (20°C) 2 80082
10.0 mg/L
15.0 mg/L
2/Week 3
Composite
Influent and
(November 1- March 31)
Effluent
Total Suspended Solids 2 C0530
30.0 mg/L
45.0 mg/L
2Meek 3
Composite
Influent and
Effluent
NH3 as N
C0610
(April 1 -October 31)
1.2 mg/L
3.6 mg/L
2Meek 3
Composite
Effluent
NH3 as N
00610
(November 1- March 31)
2.3 mg/L
6.9 mg/L
2/Week 3
Composite
Effluent
Dissolved Oxygen 00300
Daily Average > 6A mg/L
Daily
Grab
Effluent
Fecal Coliform
(geometric mean) 31616
2001100 mL
10001100 4001100 mL 0/
2Meek 3
Grab
Effluent
pH 00400
Between 6.0 and 9.0 standard units
Daily
Grab
Effluent
Temperature (°C) 00010
Daily
Grab
Effluent
Conductivity (Nmhoslcm) 00094
Daily
Grab
Effluent
Total Nitrogen (NO2+NO3+TKN)
C0600
(mg/L)
Monthly
Composite
Effluent
Total Phosphorus (mg/L) C0665
See SpeciaLCo (di,ion A. (4) and A.
Monthly
Composite
Effluent
Total Copper 4,8 (Ng/L) 01042
Quarterly
Composite
Effluent
Total Silver 5,8 (lag/L) 01077
Quarterly
Composite
Effluent
Total Chromium 8 (lag/L) 01034
Monthly
Composite
Effluent
Chromium VI 6,8 01032
13.3 Ng/L 18.8 lag/L
Monthly
Composite
Effluent
Cyanide 00720
6.1 Ng/L 25.9 Ng/L
Monthly
Grab
Effluent
Total Phenolic Compounds 32730
Quarterly
Grab
Effluent
(N9/L)
Chronic Toxicity 7 TGP3B
Quarterly
Composite
Effluent
Hardness- Total as [CaCO3 or
(Ca + Mg)] (mg/L) 8 00900
Quarterly
Composite
Effluent
Effluent Pollutant Scan NC01
Monitor and Report
Footnote 9
Footnote 9
Effluent
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see A. (8)].
Page 3 of 11

Permit NCO024945
2. The monthly average effluent CBOD5 and Total Suspended Solids concentrations shall not exceed
15% of the respective influent value (85%) removal.
3. 2/Week monitoring for CBOD5 and TSS for influent and effluent samples and effluent samples for
fecal coliform and NH3-N must occur on any two non-consecutive days during the calendar week
(Sunday through Saturday).
4. If Charlotte Water decides to develop site-specific standards, the proposed course of action shall be
consistent with "Interim Guidance on Determination and Use of Water -Effect Ratios for Metals"
EPA -823-B-94-001, February 1994. The Division and EPA will review the proposed course of
action and may provide comments.
5. Total silver shall be reported down to the practical quantitation limit of 1.0 µg/L.
6. If chromium VI is not detected (i.e. non-detectable concentrations < 5 gg/L) after two years of
sampling, the permittee may request the DWR to reduce or remove monitoring requirements for
chromium VI in special condition A. (1).
7. Whole effluent toxicity shall be evaluated using Chronic Toxicity (Ceriodaphnia) P/F test at 83%
during the months of January, April, July, and October [See A. (3)].
8. Effluent hardness samples shall coincide with sampling of metals.
9. The permittee shall preform three Effluent Pollutant Scans during the term of this permit [see A. (6)].
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER
THAN TRACE AMOUNTS.
Page 4 of 11

Permit NCO024945
A. (2) INSTREAM MONITORING REQUIREMENTS
_[15A NCAC 02B.0500 et seq.]
Instream monitoring requirements for Irwin Creek WWTP's receiving streams, Irwin Creek and Sugar
Creek, shall be maintained in McAlpine Creek WWMF's permit (NC0024970). Instream monitoring and
reporting requirements for Irwin Creek and Sugar Creek will be identified in McAlpine Creek WWMF's
permit (NC0024970) and shall continue to be submitted on McAlpine Creek WWMF's electronic
discharge monitoring reports.
A. (3) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B.0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition ofreproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 83 °yon
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or
subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity -Test Procedure"
(Revised- December 2010) or subsequent. versions. The tests will be performed during the months of
January, April, July and October. These months signify,�he first month of each three-month toxicity
testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall`be performed at the NFDES permitted final effluent discharge
below all treatment processes.
If the test procedure performed as\the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum, in
each of the two following months as'described in `KNorth Carolina Phase II Chronic Whole
Effluent Toxicity Test Procedure"(Revised=December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge monitoring Form (MR -1) for the months in which tests were performed, using the parameter
code TGP311 for the,pass/fail results and TIIP3B for the Chronic Value. Additionally, DWR Form AT -
3 (original) is to be�sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
Page 5 of 11

Permit NCO024945
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the
Water Sciences Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring
will be required during the following month. Assessment of toxicity compliance is based on the toxicity
testing quarter, which is the three month time interval that begins on the first day of the month in which
toxicity testing is required by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing _to be completed no later
than the last day of the month following the month of the initial monitoring.
A. (4) TOTAL PHOSPHORUS LIMIT
[NCGS 143-215.1 (b)]
As stipulated by the 2002 Settlement Agreement between Charlotte -Mecklenburg Utilities (CMU), the
South Carolina Department of Health and Environmental Control (SC DHEC) and the North Carolina
Division of Water Quality (NC-DWQ), now North Carolina Division of Water Resources, Charlotte
Water's McAlpine Creek WWMF, Sugar Creek WWTP and Irwin Creek WWTP must comply with a
combined 12 month rolling average limit of 826.0 lbs/day as of February 28, 2006. This limit is defined
as an effluent limit for total phosphorus from the total combined discharge from the three referenced
Charlotte Water wastewater treatment plants (based on a 12 -month rolling average). The methodology
for calculating the annual average is described in special condition A. (5).
A. (5) TOTAL PHOSPHORUS MONITORING
[NCGS 143-215.1 (b)]
The Permittee shall calculate a 12 -month rolling average mass loading as the sum of monthly loadings,
according to the following equations:
a) Monthly Average (lbs./day) = TP x Qw x 8.34
where:
TP = the arithmetic average of total phosphorus concentrations (mg/L) obtained via
composite samples (either daily, weekly, or monthly average values) collected during the
month
Qw = the average daily waste flow (MGD) for the month
8.34 = conversion factor, from (mg/L x MGD) to pounds
Page 6 of 11

Permit NCO024945
The 12 -month rolling average mass loading is defined as the sum of the monthly average loadings for the
previous 12 months inclusive of the reporting month:
12
b) 12 -Month Mass Loading (lbs./day)= TPma =12 (inclusive of reporting month)
1
where:
TPma is defined as the total phosphorus monthly average mass loading (calculated above).
The monthly average and 12 -month average mass loadings shall be reported and submitted with the
discharge monitoring report for McAlpine Creek WWMF (NC0024970). The total phosphorus monthly
average mass loadings should be reported on the discharge monitoring report for the respective facility.
The Permittee shall report the total phosphorus concentration for each sample on the appropriate
discharge monitoring report for each facility. Reporting of and compliance with the phosphorus limit
shall be done on a monthly basis.
A. (6) EFFLUENT POLLUTANT SCAN
[NCGS 143-215.1 (b)]
The Permittee shall perform a total of three, (3) Effluent Pollutant Scans for all parameters listed below.
One scan must be performed in each of the following years: 2018, 2020, and 2021. Analytical methods
shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether
parameters are present in concentrations greater than applicable standards and criteria. Samples should
be collected with one quarterly toxicity test each year, and must represent seasonal variation [i.e., do not
sample in the same quarter every year]. Unless otherwise indicated, metals shall be analyzed as "total
recoverable."
Ammonia (as N)
C0610
1,2-dichloroethane
Chlorine (total residual, TRC)
50060
Trans-1,2-dichloroethylene
Dissolved oxygen
00300
1,1-dichloroethylene
Nitrate
00620
1,24ichloropropane
Nitrite
00615
1,3-dichtoropropylene
Kjeldahl nitrogen
00625
Ethylbenzene
Oil and grease
00556
Methyl bromide
Phosphorus
C0665
Methyl chloride
Total dissolved solids
70295
Methylene chloride
Hardness
00900
1,1,2,2 -tetrachloroethane
Antimony
01097
Tetrachloroethylene
Arsenic
01002
Toluene
Beryllium
01012
1,1,1 -trichloroethane
Cadmium
01027
1,1,2 -trichloroethane
Chromium
01034
Trichloroethylene
Copper
01042
Vinyl chloride
Lead
01051
Acid -extractable comlounds:
Mercury (Method 1631E)
COMER
P -chloro -m -cresol
Nickel
01067
2 -chlorophenol
Selenium
01147
2,4-dichlorophenol
Silver
01077
2,4 -dimethylphenol
Page 7 of 11
32103
Bis (2-chloroethoxy) methane
34278
34546
Bis (2-chloroethyl) ether
34273
34501
Bis (2-chloroisopropyl) ether
34283
34541
Bis (2-ethylhexyl) phthalate
39100
77163
4-bromophenyl phenyl ether
34636
34371
Butyl benzyl phthalate
34292
34413
2-chloronaphthalene
34581
34418
4-chlorophenyl phenyl ether
34641
34423
Chrysene
34320
81549
Di -n -butyl phthalate
39110
34475
Di-n-octyl phthalate
34596
34010
Dibenzo(a,h)anthracene
34556
34506
1,2 -dichlorobenzene
34536
34511
1,3 -dichlorobenzene
34566
39180
1,4 -dichlorobenzene
34571
39175
3,3-dichlorobenzidine
34631
Diethyl phthalate
34336
34452
Dimethyl phthalate
34341
34586
2,4-dinitrotoluene
34611
34601
2,6-dinitrotoluene
C0626
34606
1,2-diphenylhydrazine
34346

Permit NCO024945
Thallium
01059
4,6-dinitro-o-cresol
34657
Fluoranthene
C0376
Zinc
01092
2,4-dinitrophenol
34616
Fluorene
34381
Cyanide
00720
2-nitrophenol
34591
Hexachlorobenzene
C0700
Total phenolic compounds
32730
4-nitrophenol
34646
Hexachlorobutadiene
39702
Volatile organic compounds:
Pentachlorophenol
39032
Hexachlorocyclo-pentadiene
34386
Acrolein
34210
Phenol
34694
Hexachloroethane
34396
Acrylonitrile
34215
2,4,6 -trichlorophenol
34621
Indeno(1,2,3-cd)pyrene
34403
Benzene
34030
Base -neutral compounds:
Isophorone
34408
Bromoform
32104
Acenaphthene
34205
Naphthalene
34696
Carbon tetrachloride
32102
Acenaphthylene
34200
Nitrobenzene
34447
Chlorobenzene
34301
Anthracene
CO220
N-nitrosodi-n-propylamine
34428
Chlorodibromomethane
34306
Benzidine
39120
N-nitrosodimethylamine
34438
Chloroethane
85811
Benzo(a)anthracene
34526
N-nitrosodiphenylamine
34433
2-chloroethyl vinyl ether
34576
Benzo(a)pyrene
34247
Phenanthrene
34461
Chloroform
32106
3,4 benzofluoranthene
34230
Pyrene
34469
Dichlorobromomethane
32101
Benzo(ghi)perylene
34521
1;2,4-bichlorobenzene
34551
1,1-dichloroethane
34496
Benzo(k)fluoranthene
34242
Reporting. Test results shall be reported electronically via eDMR or on DWR Form — DMR -PPA -1 (or
on a form approved by the Director) by, December 31s' of each designated sampling year. The report
shall be submitted to the following address:
NC DEQ / DWR / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that
Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also
subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.210)(5)
and EPA Municipal Application Form 2A. The US EPA requires four (4) toxicity tests for a test
organism other than the test species currently required in this permit. The second species tests should be
conducted either quarterly for a 12 -month period prior to submittal of the permit renewal application, or
four tests performed at least annually in the four and one half year period prior to the application. The
second species tests must be xpultiple concentration (5 concentrations plus the control). These tests shall
be performed -for acute or chronic toxicity, whichever is specified in this permit. POTWs performing
NPDES chronic Ceriodaphnia testing should perform chronic Fathead minnow testing. POTWs
performing NPDES acute Fathead Minnow testing should perform acute Ceriodaphnia testing. POTWs
performing NPDES chronic Mysid shrimp testing should perform chronic Silverside Minnow testing.
The second species toxicity test results shalt be filed with the Aquatic Toxicology Brat-ich at the
following address:
North Carolina Division of Water Resources.
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E
(Toxicity Testing Data) of EPA Municipal Application Form 2A, when submitting the permit renewal
application to the NPDES Permitting Unit.
Page 8 of 11

Permit NCO024945
A. (7) MERCURY MINIMIZATION PLAN (MMP)
[NCGS 143-215.1 (b)]
The permittee shall develop and implement a mercury minimization plan during this permit term. The
MMP shall be developed within 180 days of the NPDES Permit Effective Date, and shall be available
for inspection on-site: A sample MMP was developed through a stakeholder review process and has
been placed on the Division website for guidance (http://deq.nc.gov/about/divisions/water-
resources/water-resources-permits/wastewater-branch/npdes-wastewater-permits, under Model Mercury
Minimization Plan). The MMP should place emphasis on identification of mercury contributors and
goals for reduction. Results shall be summarized and submitted with the next permit renewal.
Performance of the Mercury Minimization Plan will meet the. requirements of the TMDL (Total
Maximum Daily Load) for mercury approved by USEPA on October 12, 2012, unless and until a Waste
Load Allocation specific to this facility is developed and this NPDES permit is amended to require
further actions to address the Waste Load Allocation.
A. (8) ELECTRONIC REPORTING OF MONITORING REPORTS
[NCGS 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December
21, 2015.
NOTE: This special condition supplements or supersedes the following sections within Part H of this
permit (Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements ISupersedes'Section D. (2.) and Section E. (5.) (a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. Until such time that the state's
eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed original and a copy of the computer printed eDMR to the
following address:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Page 9 of 11

Permit NCO024945
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility
being physically located in an area where less than 10 percent of the households have broadband
access, then a temporary waiver from the NPDES electronic reporting requirements may be granted
and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1. 1, 2, 3) or
alternative forms approved by the Director. Duplicate signed copies shall be submitted to the
mailing address above. See "How to Request a Waiver from Electronic Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the month following
the issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
Starting on December 21, 2020, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting, waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must.identify the initial recipient at the time
of each electronic submission. The permittee should use the EPA's website resources to identify the
initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity
for receiving.electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at: httl)s //www.federalre-.,ister.t,ov/documents/2015/10/22/201.5-
24954/national-i,ollutant-dischar -,e-elimination-s._stem-n4}des-electronic-reLiortin, -rule
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to
the Division. Requests for temporary electronic reporting waivers must be submitted in writing to
the Division for written approval at least sixty (60) days prior to the date the facility would be
required under this permit to begin submitting monitoring data and reports. The duration of a
Page 10 of 11

Permit NC0024945
temporary waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data
and reports shall be submitted electronically to the Division unless the permittee re -applies for and is
granted a new temporary electronic reporting waiver by the Division. Approved electronic reporting
waivers are not transferrable. Only permittees with an approved reporting waiver request may
submit monitoring data and reports on paper to the Division for the period that the approved
reporting waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
hti])://dpq.nc. -ov/about/divisions/water-resources/edmr
4. Siunatory Reguirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (I 1.)(b). A person, and not a position, must be delegated signatory authority for eDMR
reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user
account and login credentials to access the eDMR system. For more information on North
Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit
the following web page:
httli:Hdeq.nc. ,ov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION
WILL BE ACCEPTED:
7 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. "
5. Records Retention jSu221ements Section D.(6.11
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR
submissions. These records or copies shall be maintained for a period of at least 3 years from the
date of the report. This period may be extended by request of the Director at any time [40 CFR
122.41].
Page 11 of 11

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