NC0020184_Draft Permit_20210907

/N,t STATE
ROY COOPER 4'41 so
Governor `
ELIZABETH S.BISER ,
Secretary
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
September 7, 2021
Two Rivers Utilities(TRU)
Attn: Stephanie Scheringer
Division Manager Wastewater Treatment
P.O. Box 1748
Gastonia,North Carolina 28053
Subject: Draft NPDES Permit Renewal
Permit NC0020184
Long Creek WWTP
Gaston County
Facility Grade IV(16.0 MGD)
SIC 4952
Dear Stephanie Scheringer:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for the Long Creek WWTP
(Facility).Please review this draft carefully to ensure a thorough understanding ofthe requirements
and conditions it contains. There are few changes from the existing permit, including the
following:
• The Facility components list on the supplement to permit cover sheet (Cover Sheet) were
adjusted according to the flow process diagram provided with the permit application renewal
and inspection reports.
• The outfall coordinates were updated throughout the permit.
• Parameter codes were included in the Effluent Limitations and Monitoring Requirements
table [See Section A. (1)].
• Based on NPDES guidance regarding the reduction of monitoring frequencies in NPDES
permits for exceptionally performing facilities, monitoring requirements for NH3-N, total
suspended solids, and fecal coliform have been maintained at twice per week [See Section
A.(1)].
• Since the Facility is discharging pretreated industrial wastewater, quarterly effluent
conductivity monitoring has been added to the permit [See Section A. (1.)].
• Based on the reasonable potential analysis (RPA) predicting a maximum effluent total
chlorodibromomethane concentration that is greater than the allowable discharge
concentration based on state water quality standards, quarterly monitoring for
chlorodibromomethane has been added to the permit [See Section A. (1.)].
• Based on the RPA predicting a maximum effluent total dichlorodibromomethane
concentration that is greater than the allowable discharge concentration based on state water
quality standards, quarterly monitoring for dichlorodibromomethane has been added to the
permit [See Section A. (1.)].
• Based on the RPA predicting a maximum effluent total cyanide concentration that is greater
than half of the allowable discharge concentration based on state water quality standards,
quarterly monitoring for total cyanide has been added to the permit [See Sections A. (1.)].
• Language has been added to Footnotes to update information about upstream and
downstream sampling locations. [See Section A. (1.)Footnote 2].
Q,.--,,-.)), NorthNorth CarolinaSalisbury DepartmentStreet1 1 o 617f EnvironmentalMailService Center I Raleigh,Quality I Division of WaterNorthCarolina Resources
512 27699 1617
u ri.iorin». o.� �" 919.707.9000

• Former Section A.(3.) Instream Sampling was merged into Section A. (1.), in the Effluent
Limitations and Monitoring Requirements table.
• Language has been added to Footnotes to include information on monitoring coalition
programs. [See Section A. (1.), Footnote 11].
• Special Condition A. (7.) includes the specific three years in which the Effluent Pollutant
Scan shall be performed (2023, 2024, and 2025) and the Effluent Pollutant Scan list was
updated to include the pollutant's codes.
• Special Condition A.(7.)has been modified to include requirement for proper completion of
annual pollutant scan in the eDMR system.
• A notation was made concerning the Electronic Reporting Rule—Phase 2 Extension. EPA
has extended the Phase 2 deadline from December 21,2020,to December 21,2025.Effective
January 4, 2021, the current compliance date was extended as a final regulation change
published in the November 2,2020,Federal Register. [See Special Condition A. (8.)]
TRU's permit renewal letter requested to increase BOD5 summer limits, maintain monitoring
frequency for TSS, ammonia, and fecal coliform to twice per week, and reduce instream
monitoring to once per week.Since the BOD5 limits were set through modeling,the summer limits
could be revised upon receiving a modeling study proposed by the Permiee. Monitoring
frequency for TSS,ammonia, and fecal coliform were maintained at twice per week.There are no
proposed changes to instream monitoring frequency.
The NPDES standard conditions (Parts II, III, and IV), 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/3k5NFaL 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 Gaston 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 fmal permit.If you have questions concerning this
draft permit,please contact me at(919) 707-9130 or by email at diana.yitbarek(a,ncdenr.gov.
Sincerely,
Z7 z#ta- " a•ut lei
Diana Yi•arek, Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: Long Creek WWTP/David Shellenbarger, Michael Alexander, and Cody Austin
US EPA Region 4
DWR/Mooresville Regional Office/Water Quality/Cory Basinger and Ori Tuvia
DWR/NPDES Pretreatment/Keyes McGee and Wes Bell
DWR/NPDES Nutrients/Mike Templeton
DWR/Mooresville Regional Office/Water Supply/Clinton Cook
DWR/Aquatic Toxicology Branch/Zach Thomas and Cindy Moore
DWR/Operator Certification Program/Maureen Kinney
Page 2 of 2

Permit NC0020184
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
DRAFT 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,the
City of Gastonia
is hereby authorized to discharge wastewater from a facility located at the
Long Creek Wastewater Treatment Plant
3000 Old Spencer Mountain Road,Dallas,NC 28034
Gaston County
to receiving waters designated as the South Fork Catawba River in the Catawba 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 on Month DD,2021
This permit and authorization to discharge shall expire at midnight on January 31,2026.
Signed on Month DD,2021.
DRAFT
for S.Daniel Smith,Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 13

Permit NC0020184
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 City of Gastonia is hereby authorized to:
1. Continue to operate an existing 16.0 MGD wastewater treatment facility that includes the following
components:
• Influent pump station
• Mechanical bar screen and grit removal structures
• Parshall flume
• Influent pump station
• Splitter box
• Three primary clarifiers
• Raw sludge pumping station
• Two aeration basins
• Denitrification basin
• Four secondary clarifiers
• Two tertiary filters
• Backwash holding tank
• Chlorine contact basin and dechlorination structures
• Static aerators
• Dissolved air floatation(DAF)unit
• Six anaerobic digesters
• Solids contact reactor
• Chemical feed facilities
• Three standby power generators
2. Discharge wastewater from said treatment works through outfall 001 at the location specified on the
attached map into the South Fork Catawba River,classified Class WS-V waters in the Catawba River
Basin.
Page 2 of 13

Permit NC0020184
PART I
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B
.0400 et seq.,02B .0500 et seq.] Grade IV Biological Water Pollution Control System[15A
NCAC 08G.0302]
(a.) Beginning on the effective date of the permit and lasting until expiration,the Permittee is authorized
to discharge from outfall 001,treated municipal and pretreated industrial wastewater. Such
discharges shall be limited and monitored)by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location
Flow 50050 16.0 MGD Continuous Recording I or E
Total Monthly Flow 7 82220 Monitor and Report(MG/month) Monthly Recorded or I or E
Calculated
BODs(20°C)3 C0310 5.0 mg/L 7.5 mg/L Daily Composite I and E
April 1-Oct.31
BODs(20°C)3 C0310 10.0 mg/L 15.0 mg/L Daily Composite I and E
Nov.1-March 31
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L 2/Week14 Composite I and E
Ammonia(NH3 as N) C0610 2.0 mg/L 6.0 mg/L 2/Week14 Composite E
April 1-Oct.31
Novml Mar 6 31S N) C0610 4.6 mg/L 12.0 mg/L 2/Week14 Composite E
Conductivity 00094 Monitor and Report(µmho/cm) Daily Grab E
Dissolved Oxygen 00300 Daily Average>_6.0 mg/L Daily Grab E
Fecal Coliform 31616 200/100 mL 400/100 mL 2/Week14 Grab E
(Geometric Mean)
Temperature 00010 Monitor and Report(°C) Daily Grab E
Total Residual Chlorine 50060 28.0 L DailyGrab E
(TRC)4 µPS
Total Hardness s[as 00900 Monitor and Report(mg/L) Quarterly Composite E
CaCO3]
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
TKN6 00625 Monitor and Report(mg/L) Weekly Composite E
NO3-N+NO2-N 6 00630 Monitor and Report(mg/L) Weekly Composite E
Total Nitrogen 6(TN) C0600 Monitor and Report,mg/L Weekly Composite E
TN Load 7'8'9 QM600 Monitor and Report(lb/month) Monthly Calculated E
TN Load 7'8'9 QS600 Monitor and Report(lb/season) Seasonally Calculated E
Total Phosphorus(TP) C0665 1 mg/L Weekly Composite E
TP Load 7,8,9 QM665 Monitor and Report(lb/month) Monthly Calculated E
TP Load 7,8,9 QY665 Monitor and Report(lb/year) Annually Calculated E
Total Cyanide 00720 Monitor and Report(µg/L) Quarterly Grab E
Chlorodibromomethane 34306 Monitor and Report(µg/L) Quarterly Grab E
Dichlorobromomethane 38679 Monitor and Report(µg/L) Quarterly Grab E
Conductivity 00094 Monitor and Report(µmho/cm) Variable]°•" Grab U and D
Dissolved Oxygen 00300 Monitor and Report(mg/L) Variable 1"1 Grab U and D
Temperature,°C 00010 Monitor and Report(°C) Variable'°"I Grab U and D
Total Hardness s[as 00900 Monitor and Report(mg/L) Quarterly Grab U
CaCO3],mg/L
ESiauent Pollutant 12 NC01 Monitor and Report See Footnote 12 E
Chronic Toxicity13 TGP3B See Footnote 13 Quarterly I Composite E
Page 3 of 13

Permit NC0020184
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(8).
2. Sample Location:E—Effluent,I—Influent,U:upstream about 2000 feet above the outfall near GW Hardy Road, Dl:about
850 feet from the outfall near Ranlo-Spencer Mountain Road,D2:4.0 miles from the outfall at NC-7.
3. The monthly average effluent BOD5 and total suspended solids concentrations shall not exceed 15%of the respective influent
value(85%removal).
4. The Division shall consider all effluent total residual chlorine values reported below 50 ug/I 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 ug/l.
5. Effluent Total Hardness sampling shall be performed in conjunction with testing for hardness-dependent metals(cadmium,
copper,lead,nickel,silver,and zinc). The Permittee shall sample instream hardness upstream of the facility's discharge.The
sample shall be representative of the hardness in the receiving stream.
6. For a given wastewater sample,total nitrogen(TN)=TKN+NO3-N+NO2-N,where TKN is total kjeldahl nitrogen,and NO3-
N and NO2-N are nitrate and nitrite nitrogen,respectively.
7. TN or TP Load is the mass quantity of Total Nitrogen or Total Phosphorus discharged in a given period of time and requires
Total Monthly Flow(TMF).See Special Conditions A.(3.)Total Nitrogen and Total Phosphorus Limits and A.(4.)Calculation
of Total Nitrogen and Total Phosphorus Loads.
8. The facility is subject to nutrient limitations as specified in Special Condition A.(2.)Combined Limitations for Nutrients—
Outfall CO1.
9. Summer is defined as April 1—October 31;winter is defined as November 1—March 31.Annual means on a calendar year
basis,January 1—December 31.
10. Variable monitoring frequency is defined as follows:samples collected three times per week during June 1 through September
30 and once per week October 1 through May 31.
11. If the Permittee is a member of a monitoring coalition program,sampling may be waived as long as the monitoring coalition
agrees to sample at a minimum frequency of quarterly,and the Permittee has obtained approval from DWR-NPDES Permitting
Unit that the location being monitored by the Coalition and the sampling is representative of the receiving stream for this
discharge.The Permittee is responsible for submitting test results with its permit renewal application package.If Coalition
membership is canceled or the Coalition terminates sampling at the approved station,the Permittee will immediately notify the
Division and resume sampling for upstream of its discharge.
12. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit.See Special Condition A.(7).
13. Chronic Toxicity(Ceriodaphnia)P/F @ 19%March,June,September,and December.See Special Condition A.(6).
14. 2/Week sampling must occur on any two non-consecutive days during the calendar week.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
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Permit NC0020184
A.(2.) COMBINED LIMITATIONS FOR NUTRIENTS -Outfall CO1 [G.S. 143-215.1(b)]
(1.) During the period beginning on the effective date of this permit or as specified below and lasting until
permit expiration,the Permittee is further authorized to discharge Total Nitrogen and Total Phosphorus
from the Long Creek WWTP(NC0020184,Outfall 001)and the Eagle Road WWTP(NC0006033,Outfall
001)subject to the following Combined Load Limitations:
Total Nitrogen Total Nitrogen Total Phosphorus
Permit Facility Summer Winter Annual
(lb/season)1.3 (lb/season)1,3 (Ib/yr)2,3
NC0020184 Long Creek WWTP 171,337 241,793 48,706
42,834 60,448_ 12,176_
NC0006033 Eagle Road WWTP (effective through (previously eff. (effective through
10/31/20211 through 3/31/2021) 12/31/20211
214,171 302,242 60,882
Combined Load Limitations (effective through (previously eff. (effective through
10/31/2021) through 3/31/2021) 12/31/2021)
50,866 66,115_ 13,698_
NC0006033 Eagle Road WWTP4 (revised eff. (revised (eff. 1/1/2022)
4/1/2022 eff. 11/1/20211
222,203_ 307,908_ 62,404_
Combined Load Limitations4 (revised eff. (revised (eff. 1/1/2022)
4/1/2022 eff. 11/1/2021)
Footnotes:
1. In accordance with the 1995 Lake Wylie TMDL,summer values apply April 1-October 31,and winter
values apply November 1-March 31.
2. Total Phosphorus values apply for the calendar year;January 1 to December 31.
3. All values are displayed to the nearest pound.The Combined Load Limitations may not equal the
apparent sum due to the effects of rounding the individual values.
4. Limitations include the addition of Pharr Yarns allocations(8,031 lb/season(TN Summer);5,667 lb/season
(TN Winter);and 1,522 lb/season(annual TP))
(2.) Compliance with these limits shall be determined in accordance with Special Conditions A.(3.), Total
Nitrogen and Total Phosphorus Limits,and A.(4.),Calculation and Reporting of Nutrient Loads.
(3.) Nutrient monitoring and reporting requirements are specified in Special Conditions A.(1.), Effluent
Limitations and Monitoring Requirements,and A.(4.),Calculation and Reporting of Nutrient Loads.
(4.) Pursuant to N.C.General Statute Section 143-215.1 and Part II,Sections B-12 and B-13 of this permit,the
Division of Water Resources (Division) may reopen the permits listed above and establish more
stringent nutrient limits upon finding that such limits are necessary to prevent the discharges from
causing localized water quality impacts in the receiving streams.
(5.) The Permittee may request that its permits be modified to rescind these combined limits and establish
individual mass discharge limits for each facility. The Division may, after written notification to the
Permittee,rescind these combined limits and establish individual mass discharge limits for each facility.
A.(3.) TOTAL NITROGEN AND TOTAL PHOSPHORUS LIMITS [G.S. 143-215.1(b)]
(a.) Total Nitrogen(TN)allocations and load limits for NPDES dischargers in the Lake Wylie watershed are
seasonal(summer and winter)values.Summer is defined as April 1 through October 31,and winter is
defined as November 1 through March 31.Total Phosphorus(TP)allocations and load limits are annual
values and apply on a calendar year basis,January 1 through December 31.
Page 5 of 13

Permit NC0020184
(b.) The TN (or TP) Load limit in this Permit may be modified as the result of allowable changes in the
Permittee's allocation.
(i.) Allowable changes include those transfers resulting from the purchase, sale, trade, or lease of
allocation between the Permittee and other dischargers assigned allocation under the 1995 Lake
Wylie TMDL;regionalization(if both facilities were assigned allocation);and other transactions
approved by the Division.
(ii.) The Permittee may request a modification of the TN (or TP) Load limit in this Permit to reflect
allowable changes in its allocation.
(A) The request must include an analysis demonstrating that change in allocations and limits
does not have a reasonable potential to cause localized water quality impacts.
(B) Upon receipt of timely and proper application, the Division will propose to modify the
permit as appropriate and in accordance with state and federal program requirements.
(C) Changes in TN or TP limits become effective on the first January 1 (annual limit),the first
April 1(summer limit),or the first November 1(winter limit)following permit modification.
The Division must receive application no later than 180 days prior to the requested effective
date for any limit change.
(iii.) Any requests for modification should be sent to:
NCDEQ/DWR/ NPDES Programs
1617 Mail Service Center
Raleigh,NC 27699-1617
A.(4.) CALCULATION AND REPORTING OF TOTAL NITROGEN AND TOTAL
PHOSPHORUS LOADS [G.S. 143-215.1(b)1
(a.) The Permittee shall calculate monthly,seasonal,and annual TN(or TP)Loads as follows:
(i.) Monthly TN(or TP)Load(lb/mo)=TN(or TP) x TMF x 8.34
where:
TN or TP the average Total Nitrogen or Total Phosphorus concentration
(mg/L)of the composite samples collected during the month
TMF the Total Monthly Flow of wastewater discharged during the
month(MG/mo);that is,the sum of daily flows in the month
8.34 conversion factor,from(mg/L x MG)to pounds
(ii.) Summer TN Load(lb/summer)=Sum of the April-October Monthly TN Loads for the season
(iii.) Winter TN Load(lb/winter)=Sum of the November-March Monthly TN Loads for the season
(iv.) Annual TP Load(lb/yr)=Sum of the 12 Monthly TP Loads for the calendar year
(b.) The Permittee shall report monthly Total Nitrogen and Total Phosphorus results(mg/L and lb/mo)in
the appropriate discharge monitoring report for each month:the summer TN results with the October
DMR;the winter TN results with the March DMR;and each calendar year's results with the December
report for that year.
(c.) In the case of combined nutrient limits(see Special Condition A.(2.)):
(i.) The Permittee shall report each facility's monthly TN and TP effluent loads in the discharge
monitoring report for that facility.
(ii.) The Permittee shall report the seasonal or annual combined loads in the discharge monitoring
reports for the Long Creek WWTP.
(d.) Any addition,deletion,or modification of the listed allocation(s)(other than to correct typographical
errors)or any change in status of any of the listed allocations shall be considered a major modification
of this permit and shall be subject to the public review process afforded such modifications under
Page 6 of 13

Permit NC0020184
state and federal rules.
A.(5.) NUTRIENT ALLOCATIONS [G.S.143-215.1(B)]
(1.) The following table list the Total Nitrogen (TN) and Total Phosphorus (TP) allocations assigned to,
acquired by,or transferred to the Permittee in accordance with the 1995 Lake Wylie TMDL and nutrient
management strategy and the status of each as of permit issuance.These allocations are not enforceable
limits,nor do they supersede any TN or TP limit established elsewhere in this permit.
Total Nitrogen Allocation
ALLOCATION DISCHARGE DISCHARGE
SOURCE DATE ALLOCATION ALLOCATION STATUS
TYPE
SUMMER' WINTER'.
Base TMDL 1995 171,337 lb/season 241,793 lb/season Active
Total Allocation 171,337 lb/season 241,793 lb/season Active
Footnotes:
1. Summer is defined as April 1-October 31.Winter is defined as November 1-March 31.
Total Phosphorus Allocation
ALLOCATION DISCHARGE
SOURCE DATE ALLOCATION STATUS
TYPE ANNUAL'
Base TMDL 1995 48,706 lb/yr Active
Total Allocation 48,706 lb/yr Active
Footnotes:
1. Annual means on a calendar year basis,January 1-December 31.
(2.) Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical
errors)or any change in status of any of the listed allocations shall be considered a major modification
of this permit and shall be subject to the public review process afforded such modifications under
state and federal rules.
A.(6.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [15A NCAC 02B .0500 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality
to Ceriodaphnia dubia at an effluent concentration of 19%at 16.0 MGD.
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 March,June,September,
and December.Effluent sampling for this testing 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 electronically using the
Division's eDMR system for the months in which tests were performed,using the parameter code TGP3B
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Permit NC0020184
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.ATBancdenr.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 and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests,as well as all dose/response data.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,then monthly
monitoring will begin immediately.Upon submission of a valid test,this monthly test requirement will
revert to quarterly in the months specified above.
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.(7.) EFFLUENT POLLUTANT SCAN [G.S. 143-215.1(b)]
(a.) 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:2023,2024,and 2025. 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 CO100
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
Hardness 00900 1,1,2,2-tetrachloroethane 81549 Di-n-butyl phthalate 39110
Antimony 01097 Tetrachloroethylene 34475 Di-n-octyl phthalate 34596
Page 8 of 13

Permit NC0020184
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 1631 E) 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
(b.) Reporting. Test results shall be reported electronically using the Division's eDMR system or on DWR
Form DMR-PPA-1(or on a form approved by the Director)by December 31st of each designated
sampling year.
(c.) The Permittee must at least report completion of the test in the eDMR system by entering"1"or"Y"
for parameter code NC01-Annual Pollutant Scan. If utilizing the DWR Form submit to the following
address:
NC DEQ/DWR/NPDES Files,1617 Mail Service Center,Raleigh,North Carolina 27699-1617.Or
the form may be uploaded at https://edocs.deq.nc.gov/Forms/NPDES WW-EDMR-Supplemental-
Form
(d.) 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 CFI(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:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
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Permit NC0020184
(e.) 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.(8.) ELECTRONIC REPORTING OF DISCHARGE 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)!
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 monthly 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
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 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.
NPDES Electronic Reporting Rule-Phase 2 Extension.EPA extended the Phase 2 deadline to December
21,2025.The current compliance date,effective January 4,2021,was extended as a final regulation
change published in the November 2,2020 Federal Register.
Starting on December 21,2025,the permittee must electronically report the following compliance
monitoring data and reports,when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports;and
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Permit NC0020184
• 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: http://www2.epa.gov/compliance/final-national-pollutant-discharge-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.
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.) (d1l
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 states 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
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Permit NC0020184
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.)l
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].
A.(9.) MERCURY MINIMIZATION PLAN [G.S. 143-215.1(b)]
The Permittee developed and implemented a mercury minimization plan(MMP)during the previous
permit term,2017-2021. The MMP shall continue to be implemented and available for inspection on-site.
The sample MMP was developed through a stakeholder review process and has been placed on the Division
website for guidance(http://portal.ncdenr.org/web/wq/swp/ps/npdes,under Model Mercury
Minimization Plan). The MMP should continue to 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.
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Permit NCOO2O184
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Long Creek WWTP—NC0020184 1 Facility Location (not to scale)
City of Gastonia-Gaston County
Receiving Stream: South Fork Catawba River
Sub-Basin: 03-08-36 X
Stream Class: WS-V
State Grid/USGS Quad: F14SE/Mount Holly
Outfall Location: 35°18'38"N,81°06'54"W Latitude 35°18'33"N Longitude 81°07'59"W
Page 13 of 13