NC0081621_Draft Permit_20200115

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ROY COOPER 1"
Governor ` ilk° :
MICHAEL S,REGAN
Secretary s@ oo*
LINDA CULPEPPER NORTH CAROLINA
Director Environmental Quality
January 15, 2020
Mr. Chad VonCannon.
Engineering Director
Water and Sewer Authority of Cabarrus County
232 Davidson Highway
Concord,NC 28027
Subject: Draft NPDES Permit Modification
Permit NC0081621
Muddy Creek WWTP
Cabarrus County
Grade II (0.3 MGD) & III(1.0 MGD)
Biological WPCS
SIC Code 4952
Dear Mr. VonCannon:
Enclosed with this letter is a copy of the Draft NPDES permit modification 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 Division reviewed and concurred with your flow justification of 1.0 MGD, as well as
the EAA conclusion that the direct discharge to surface water alternative is the most
environmentally sound alternative selected from all reasonably cost-effective options(per
15A NCAC 2H.0105(c)(2)).
• The Effluent Limitations and Monitoring Requirements (A. (2.)) for the new 1.0 MGD
facility with outfall 002 has been added to the permit.
• The Supplement to Permit Cover Sheet has been updated to include prior to expansion to
1.0 MGD with outfall 002, plans and specifications must be submitted to the Division for
approval and subsequent issuance of Authorization to Construct(A to C). No construction
may begin until such authorization has been issued by the Division. Also,no discharge via
outfall 002 may begin until submission of Engineer's Certification of completion to the
Division.
• Special condition has been added to the permit requiring closure of the existing facility
(outfall 001)once the construction of the new facility(outfall 002)has been completed and
the Engineer's Certification of completion has been submitted to the Division[See A.(4.)].
• The topographic map was updated to include the proposed location of outfall 002 and the
location of the existing facility.
North Carolina Department of Environmental Quality Division of Water Resources
�D_E ) 512 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699 1617
N(x1TM CANOtlN1
Q. /'� 919.707.9000

• Effluent Limitations and Monitoring Requirements sheet for the 0.15 MGD flow tier has
been removed from the permit, based on receipt of the final Engineer's Certification for
the expansion to 0.3 MGD.
• Since the facility established full pretreatment program in 2017, effluent and instream
monitoring for conductivity has been added to 0.3 MGD flow tier[See A. (1.)].
• Permittee is required to analyze the Mercury using low level EPA Method 1631 E, which
allows mercury to be detected down to 0.5 ng/L.
• Permittee reported Total Silver at less than detection, with detection level< 2.5 µg/L.
The allowable monthly discharge concentrations for your facility are 5.1 µg/L and 1.6 µg/L
for 0.3 MGD flow tier and 1.0 MGD flow tier, respectively. DWR's laboratory identifies
the target Practical Quantification Limits (PQLs) for Total Silver as 1.0 µg/L. In
accordance with 15A NCAC 2B .0500 all test procedures must produce minimum detection
and reporting levels that are below the allowable discharge concentration and all data
generated must be reported down to the minimum detection level or lower reporting level
of the procedure. The Permittee should use sufficiently sensitive test methods when
analyzing effluent data,including performing Effluent Pollutant Scans. Following is a link
to DWR's METHODS, PQLs, QA to view target PQL's:
https://deq.n c.gov/about/divisions/water-resources/water-resources-data/water-
sciences-home page/microbiology-inorganics-branch/methods-pals-qa
• Special condition A. (3.), Chronic Toxicity Permit Limit, has been updated to include the
chronic toxicity effluent concentration limit of 3.9%for the 1.0 MGD flow tier.In addition,
the chronic toxicity effluent concentration limit of 0.6% for the 0.15 MGD flow has been
removed in recognition of the facility upgrade to 0.3 MGD. please review each paragraph
carefully.
• New footnote has been added to Special Condition A. (1.), Effluent Limitations and
Monitoring Requirements, specifying that 2/week sampling shall be conducted on any two
non-consecutive days during the calendar week [See Footnote four(4)in Section A. (1.)].
• Parameter codes have been added to the Effluent Pollutant Scan special condition [See A.
(5.)].
Please note that the receiving stream, Rocky River, is listed as impaired for turbidity, copper and
zinc on the North Carolina 2016 303(d) 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 stream impairment can be attributed to your
facility, then mitigative measures may be required.
The NPDES standard conditions (Parts II and III) that are a part of the permit are not included in
this draft document(cover,map,and Part I). The conditions are the same as in your current permit
except that agency and division names have been updated. The latest version is available at
https://bit.ly/2BZ4xxx and can be viewed online or downloaded as a PDF file.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Cabarrus 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.
Page 2 of 3

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 contact me at(919) 707-3607 or by email at [e-mail].
Sincerely,
Qais Banihani, Engineer
NPDES Complex Permitting Unit
Hardcopy: NPDES Files
Ecopy: Mooresville Reginal Office/Water Quality
US EPA Region 4
Wastewater Operator Certification Group/Maureen Kinney
WSS/Aquatic Toxicology Branch/Hannah Headrick
WSS/Ecosystem Branch/Mark Vander Borgh
NCWRC/Olivia Munzer
Willis Engineers/Charles A. Willis
Field WWTP Operator/Kimberly D. Holt
Page 3 of 3

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 provision 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, the
Water and Sewer Authority of Cabarrus County
is hereby authorized to discharge wastewater from a facility located at the
Muddy Creek WWTP
14655 Hopewell Church Road
Midland
Cabarrus County
to receiving waters designated as the Rocky River in subbasin 03-07-12 of the Yadkin-Pee Dee River
Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, II, III and IV hereof.
This permit shall become effective Month XX, 20XX.
This permit and authorization to discharge shall expire at midnight on October 31, 2023.
Signed this day Month XX, 20XX,
DRAFT
Linda Culpepper, Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0081621
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility,whether for operation or discharge are hereby
revoked. As of this permit 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.
The Water and Sewer Authority of Cabarrus County is hereby authorized to:
1. Continue to operate an existing 0.3 MGD wastewater treatment system that includes the following
components:
• Pump station
• Mechanical bar screen and backup manual bar screen
• Equalization basin
• Influent splitter box
• Two treatment trains, each containing:
> Surge basin
> Two aeration basins
> Sludge holding tank
> Aerobic digester
> Two clarifiers
• Tertiary filters
• Ultra-violet disinfection
• Cascade aeration
• Aerobic residuals digestion
• Aerated sludge holding tank
• Stand—by power
The facility is located in Midland at the Muddy Creek WWTP at 14655 Hopewell Church Road,
Midland,NC in Cabarrus County.
2. After receiving an Authorization to Construct(A to C) from the Division, construct new facility with
outfall 002 and after submitting an Engineer's certification, operate treatment facilities not to exceed
a permitted flow of 1.0 MGD.
3. Discharge from said treatment works via outfalls 001 or 002 at the locations specified on the
attached map into the Rocky River, currently classified C waters in the Yadkin-Pee Dee River Basin.
Page 2 of 13

Permit NC0081621
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.3 MGD)
115A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade II Biological Water Pollution
Control System [15A NCAC 08G .0302]
Beginning on the effective date of this permit and lasting until expansion above 0.3 MGD (and receipt
of the Engineer's Certification of completion) or until expiration, the Permittee is authorized to
discharge treated municipal wastewater from outfall 001. Such discharges shall be limited and
monitored' by the Permittee as specified below:
PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency 2 Type Location 2
Flow 50050 0.3 MGD Continuous Recording Influent or Effluent
BOD,5-day(20°C)3 Influent and
(April 1 —October 31) C0310 10.0 mg/L 15.0 mg/L 2/W 4 eek Composite Effluent
BOD,5-day(20°C)3 Influent and
C0310 20.0 mg/L 30.0 mg/L 2/Week 4 Composite
(November 1 —March 31) Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/Week 4 Composite Influent and
(TSS)3 g gEffluent
Ammonia(NH3 as N)
(April 1 October 31) C0610 4.0 mg/L 12.0 mg/L 2/Week 4 Composite Effluent
Ammonia(NH3 as N)mg/L C0610 8.0 mg/L 24.0 mg/L 2/Week 4 Composite Effluent
(November 1 -March 31)
Dissolved Oxygen(DO) 00300 Daily average.?5.0 mg/L 3/Week Grab Effluent
Fecal Coliform 31616 200/100 mL 400/100 mL 2/Week 4 Grab Effluent
(geometric mean)
Total Residual Chlorine 50060 28 pg/L 3/Week Grab Effluent
(TRC)5
Temperature(°C) 00010 3/Week Grab Effluent
pH 00400 Between 6.0 and 9.0 standard units 3/Week Grab Effluent
Conductivity(pmhos/cm) 00094 3/Week Grab Effluent
Total Hardness[as CaCO3] 00900 Monitor and Report QuarterlyComposite Effluent
(mg/L)6 P P
Chronic Toxicity 7 TGP3B Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 8 Footnote 8 Effluent
Dissolved Oxygen 9(mg/L) 00300 Variable Grab U, D
Page 3 of 13

Permit NC0081621
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER CHARACTERISTICS
Parameter Code Monthly Weekly Daily MEASUREMENT Sample Sample
Average Average Maximum FREQUENCY 2 Type Location 2
Temperature 9(°C) 00010 Variable Grab U, D
Conductivity(pmhos/cm) 00094 Variable Grab U, D
Total Hardness[as CaCO3] 00900 Monitor and Report QuarterlyGrab U
(mg/L) io P
Footnotes:
1. Submit discharge monitoring reports electronically using the NC DWR's eDMR application system[See A.(6.)].
2. U: upstream at least 200 feet from the outfall. D: downstream at NCSR 1140. Instream sampling shall consist of grab
samples collected 3/week during June,July,August,and September and weekly during the remainder of the year.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15%of the respective
influent values(85%removal).
4. 2/week sampling must occur on any two non-consecutive days during the calendar week.
5. Effluent monitoring and limitation only apply if chlorine or a chlorine derivative is added to the waste stream during
treatment. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the
permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified
laboratory(including field certified),even if these values fall below 50 µg/L.
6. Effluent Total Hardness sampling shall be conducted in conjunction with effluent metals for the pretreatment
program.
7. Chronic Toxicity(Ceriodaphnia)at 1.2%;quarterly during January,April,July and October[See Special Condition A.
(3.)].
8. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit[See Section A.(5)]
9. Instream (U&D) sampling is provisionally waived based on the Permittee's membership in the Yadkin-Pee Dee
River Basin Association (YPDRBA). If at any time during the term of this permit, membership is terminated, the
Permittee shall notify the Division immediately, and immediately conduct instream monitoring as stipulated in this
permit.
10. The Permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be representative of
the hardness in the receiving stream. If the Permittee is a member of a monitoring coalition program, sampling for
instream hardness may be waived as long as the monitoring coalition agrees to sample hardness at the nearest upstream
location, at a minimum frequency of quarterly, and the Permittee has obtained approval from DWR-NPDES Permitting
Unit that the upstream station being monitored by the Coalition is representative of the receiving stream for this
discharge. The Permittee is responsible for submitting instream hardness test results with its permit renewal application
package. If Coalition membership is cancelled or the Coalition terminates instream hardness sampling at the approved
station, the Permittee will immediately notify the Division and resume sampling for instream hardness upstream of its
discharge.
There shall he no discharge of floating solids or visible foam in other than trace amounts
Page 4 of 13

Permit NC0081621
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (1.0 MGD)
115A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade III Biological Water Pollution
Control System [15A NCAC 08G .0302]
Beginning upon receipt of the Engineer's Certification of completion of the 1.0 MGD expansion and
lasting until permit expiration, the Permittee is authorized to discharge treated municipal wastewater
from outfall 002. Such discharges shall be limited and monitored' by the Permittee as specified below:
PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency 2 Type Location 2
Flow 50050 1.0 MGD Continuous Recording Influent or Effluent
BOD,5-day(20°C)3 Influent and
(April 1 —October 31) C0310 5.0 mg/L 7.5 mg/L 3/Week Composite Effluent
BOD,5-day(20°C)3 C0310 10.0 mg/L 15.0 mg/L 3/Week Composite Influent and
(November 1 —March 31) Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 3/Week Composite Influent and
(TSS) Effluent
Ammonia(NH3 as N) C0610 1.0 mg/L 3.0 mg/L 3/Week Composite Effluent
(April 1 -October
9 9 P
31)
Ammonia(NH3 as N)mg/L C0610 2.0 mg/L 6.0 mg/L 3/Week Composite Effluent
(November 1 -March 31)
Dissolved Oxygen(DO) 00300 Daily average>_5.0 mg/L 3/Week Grab Effluent
Fecal Coliform 31616 200/100 mL 400/100 mL 3/Week Grab Effluent
(geometric mean)
Total Residual Chlorine
(TRC)
a 50060 28 pg/L 3/Week Grab Effluent
Temperature(°C) 00010 3/Week Grab Effluent
pH 00400 Between 6.0 and 9.0 standard units 3/Week Grab Effluent
Total Nitrogen(mg/L)s C0600 Monitor and Report Monthly Composite Effluent
(TKN+NO2-N+NO3-N)
Total Phosphorus(mg/L) C0665 Monitor and Report Monthly Composite Effluent
Conductivity(pmhos/cm) 00094 Monitor and Report 3/Week Grab Effluent
Total Hardness[as CaCO3] 00900 Monitor and Report QuarterlyComposite Effluent
(mg/L)6 P P
Chronic Toxicity 7 TGP3B Quarterly Composite Effluent
Effluent Pollutant Scan NCO/ Monitor and Report Footnote 8 Footnote 8 Effluent
Page 5 of 13

Permit NC0081621
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER CHARACTERISTICS
Parameter Code Monthly Weekly Daily MEASUREMENT Sample Sample
Average Average Maximum FREQUENCY 2 Type Location 2
Dissolved Oxygen 9(mg/L) 00300 Variable Grab U, D
Temperature 9(°C) 00010 Variable Grab U, D
Conductivity 00094 Variable Grab U, D
Total Hardness[as CaC031 00900 Monitor and Report QuarterlyGrab U
(mg/L) io p
Footnotes:
1. Submit discharge monitoring reports electronically using the NC DWR's eDMR application system[See A.(6.)].
2. U: upstream at least 200 feet from the outfall. D: downstream at NCSR 1140. Instream sampling shall consist of
grab samples collected 3/week during June, July, August, and September and weekly during the remainder of the
year.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent values(85%removal).
4. Effluent monitoring and limitation only apply if chlorine or a chlorine derivative is added to the waste stream during
treatment. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the
permit. However,the Permittee shall continue to record and submit all values reported by a North Carolina certified
laboratory(including field certified),even if these values fall below 50 µg/L.
5 TN=TKN+NO2-N+NO3-N where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen,and NO2-N+NO3-N
are Nitrite and Nitrate Nitrogen,respectively.
6. Effluent Total Hardness sampling shall be conducted in conjunction with effluent metals for the pretreatment
program.
7. Chronic Toxicity (Ceriodaphnia) at 3.9%; quarterly during January, April, July and October [See Special
Condition A.(3.)].
8. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit[See Section A.(5.)]
9. Instream (U & D) sampling is provisionally waived based on the Permittee's membership in the Yadkin-Pee
Dee River Basin Association(YPDRBA). If at any time during the term of this permit,membership is terminated,
the Permittee shall notify the Division immediately, and immediately conduct instream monitoring as stipulated in
this permit.
10. The Permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the receiving stream. If the Permittee is a member of a monitoring coalition
program, sampling for instream hardness may be waived as long as the monitoring coalition agrees to sample
hardness at the nearest upstream location, at a minimum frequency of quarterly, and the Permittee has obtained
approval from DWR-NPDES Permitting Unit that the upstream station being monitored by the Coalition is
representative of the receiving stream for this discharge. The Permittee is responsible for submitting instream
hardness test results with its permit renewal application package. If Coalition membership is cancelled or the
Coalition terminates instream hardness sampling at the approved station, the Permittee will immediately notify the
Division and resume sampling for instream hardness upstream of its discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts
Page 6 of 13

Permit NC0081621
A (3.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [15A NCAC 02B.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 1.2% at 0.3 MGD flow regime and
3.9% at 1.0 MGD flow regime.
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 the 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 NPDES 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 "North 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 TGP3B for the pass/fail results and THP3B 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
Or, results can be sent to the email, ATForms.ATBga,ncdenr.gov.
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
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
Page 7 of 13

Permit NC0081621
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.) FACILITY CLOSURE REQUIREMENTS [G.S. 143-215.1(b)]
Once the construction of the new facility with outfall 002 is completed and the facility submit the
Engineer's Certification of Completion, the Permittee must submit to the Division a closure plan for the
existing facility (outfall 001). The plan must be submitted at least 90 days prior to the closure of the
existing facility covered by this permit. The Division may require specific measures during deactivation
of the facility to prevent adverse impacts to waters of the state. The closure plan must be submitted to:
1. NC DEQ/DWR/Water Quality Permitting Section
Attn: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
2. Mooresville Regional Office/Water Quality Section
610 East Center Avenue
Suite 301
Mooresville,NC 28115
A. (5.) EFFLUENT POLLUTANT SCAN (Municipal POTWs) [G.S. 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: 2020, 2021, and 2022. 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 Trans-1,2-dichloroethylene 34546 Bis(2-chloroethyl)ether 34273
Chlorine(total residual,TRC) 50060 1,1-dichloroethylene 34501 Bis(2-chloroisopropyl)ether 34283
Dissolved oxygen 00300 1,2-dichloropropane C0541 Bis(2-ethylhexyl)phthalate C0100
Nitrate/Nitrite 00630 1,3-dichloropropylene 77163 4-bromophenyl phenyl ether 34636
Kjeldahl nitrogen 00625 Ethylbenzene 34371 Butyl benzyl phthalate 34292
Oil and grease 00556 Methyl bromide 34413 2-chloronaphthalene 34581
Phosphorus C0665 Methyl chloride 34418 4-chlorophenyl phenyl ether 34641
Total dissolved solids 70295 Methylene chloride 34423 Chrysene 34320
Page 8 of 13

Permit NC0081621
Hardness 00900 1,1,2,2-tetrachloroethane 81549 Di-n-butyl phthalate 39110
Antimony 01097 Tetrachloroethylene 34475 Di-n-octyl phthalate 34596
Arsenic 01002 Toluene 34010 Dibenzo(a,h)anthracene 34556
Beryllium 01012 1,1,1-trichloroethane 34506 1,2-dichlorobenzene 34536
Cadmium 01027 1,1,2-trichloroethane 34511 1,3-dichlorobenzene 34566
Chromium C0034 Trichloroethylene 39180 1,4-dichlorobenzene 34571
Copper 01042 Vinyl chloride 39175 3,3-dichlorobenzidine 34631
Lead 01051 Acid-extractable compounds: Diethyl phthalate 34336
Mercury(Method 1631E) COMER P-chloro-m-cresol 34452 Dimethyl phthalate 34341
Nickel 01067 2-chlorophenol 34586 2,4-dinitrotoluene 34611
Selenium 01147 2,4-dichlorophenol 34601 2,6-dinitrotoluene C0626
Silver 01077 2,4-dimethylphenol 34606 1,2-diphenylhydrazine 34346
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 C0702
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 C0526 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-trichlorobenzene C0551
1,1-dichloroethane 34496 Benzo(k)fluoranthene 34242
1,2-dichloroethane 32103 Bis(2-chloroethoxy)methane 34278
Reporting. Test results shall be reported on DWR Form-A MR-PPA1 (or in a form approved by the
Director) by December 31 st 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 122.21(j)(5).
The US EPA requires four (4) toxicity tests for a test organism other than the test species currently
required in this permit. The multiple 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. These tests shall be performed for acute or
chronic toxicity, whichever is specified in this permit. The multiple species toxicity test results shall be
filed with the Aquatic Toxicology Branch at the following address:
Page 9 of 13

Permit NC0081621
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.
A. (6.) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S. 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 II 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 [Supersedes 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
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
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Permit NC0081621
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: https://www.federalregister.gov/documents/2015/10/22/2015-
24954/national-pollutant-di scharge-elimination-system-npdes-electronic-reporting-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
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.
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Permit NC0081621
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B.(11.)(b)and Supersedes Section B.(11.)(d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (11.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (11.)(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:
http://deq.nc.gov/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:
"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."
5. Records Retention [Supplements Section D.(6.)1
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].
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Permit NC0081621
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Location Aiditiff,
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