NC0025542_Draft Permit_20210406

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ROY COOPER 14(
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DIONNE DELLI-GATTI , „ "*nay*
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S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
April 6, 2021
City of Hickory
Attn: Warren Wood, City Manager
P.O.Box 398
Hickory,NC 28603
Subject: Draft NPDES Permit Renewal
Permit NC0025542
Hickory-Catawba WWTP
Catawba County
Facility Grade III(1.5 MGD)
SIC Code 4952
Dear Warren Wood:
Enclosed with this letter is a copyof the Draft NPDESpermit renewal for the Hickory-Catawba
c
WWTP(Facility).Please review this draft carefully to ensure a thorough understanding of the
requirements and conditions it contains.There are few changes from the existing permit,
including the following:
• Facility components list on the supplement to permit cover sheet were adjusted according
to the flow process diagram provided with the permit application renewal.
• Parameter codes were included in the Effluent Limitations and Monitoring Requirements
tables. [See Sections A. (1.)and A. (2.)].
• Based on the reasonable potential analysis(RPA)predicting a maximum effluent methyl
bromide concentration that is greater than the allowable discharge concentration based on
state water quality standards, limits and monthly monitoring for methyl bromide has been
added to the permit [See Sections A. (1)and A.(2)]. To provide an opportunity for the
City to develop a plan to assess sources of methyl bromide in order to come in compliance
with the limits in Section A. (1.), a 3-year schedule of compliance has been added to the
permit[See Special Condition A. (7.) Schedule of Compliance for Methyl Bromide
Limitations].
• Based on NPDES guidance regarding the reduction of monitoring frequencies in NPDES
permits for exceptionally performing facilities, monitoring requirements for BODs, total
suspended solids, and fecal coliform have been reduced to twice per week [See Section A.
(1)].
• Based on the RPA predicting a maximum effluent total copper concentration that is greater
than half of the allowable discharge concentration based on state water quality standards,
quarterly monitoring for total copper has been added to the permit [See Section A. (1)].
• Based on the RPA predicting a maximum effluent dichlorobromomethane concentration
that is greater than half of the allowable discharge concentration based on state water quality
TM E -y North Carolina Department of Environmental Quality I Division of Water Resources
JJFFF"JJJ/// 512 North Salisbury Street 11617 Mail Service Center Raleigh,North Carolina 27699-1617
iop.m+M d t owannwnw owm 919.707.9000

standards,quarterly monitoring for dichlorobromomethane has been added to the permit for
the 1.5 MGD flow tier [See Section A. (1)].
• Based on the RPA showing reasonable potential to violate state water quality standards,
dichlorobromomethane limits have been added to the permit for the 3.0 MGD flow tier with
a monthly monitoring requirement [See Section A. (2.)].
• Based on the RPA showing no reasonable potential to violate state water quality standards,
the monitoring requirement for lead has been removed from the permit[See Section A.(2.)].
• Per the results of the RPA calculations,bis(2-ethylhexyl)phthalate limits have been updated
[See Section A.(2.)].
• The City of Hickory reported total silver at less than detection, with detection levels of
< 5.0 µg/L and <0.5 µg/L, in the Effluent Pollutant Scans. Based on the RPA, the City's
total silver allowable discharge concentrations are 0.395 µg/L for 1.5 MGD and 0.228 µg/L
for 3.0 MGD. 15A NCAC 2B .0505 (e) (4) requires that all test procedures must produce
detection and reporting levels that are below the permit discharge requirements and all data
generated must be reported to the approved detection level or lower reporting level of the
procedure. If no approved methods can achieve a detection level below the permit
discharge requirement(or allowable discharge concentration)the method with the lowest
detection level must be used.
• Language has been added to update information about upstream and downstream sampling
locations. [See Sections A. (1.)and A. (2.)Footnote 2].
• Language has been added to Footnotes to include information on monitoring coalition
programs. [See Sections A. (1.) and A. (2.),Footnote 8].
• Former Special Condition A. (4)Chronic Toxicity Permit limit for 3.0 MGD was merged
with Special Condition A. (3)Chronic Toxicity Permit limit for 1.5 MGD.
• Special Condition A. (4.) includes the specific three years in which the Effluent Pollutant
Scan shall be performed(2023,2024,and 2025).
• Special Condition A. (4.) includes requirements for proper completion of annual pollutant
scan in the eDMR system.
• Special Condition A. (8.) has been added to require an industrial waste survey (IWS) 180
days after the effective date of the permit.
• A notation was made concerning the Electronic Reporting Rule — NPDES Electronic
Reporting Rule—Phase 2 Extension.EPA extended the Phase 2 deadline to December 21,
2025. [See Special Condition A. (6.)].
• Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs)and program reports.The requirement to continue reporting discharge monitoring
data electronically using the NC DWR's Electronic Discharge Monitoring Report(eDMR)
internet application has been added to your NPDES permit[See Special Condition A.(6.)].
• Regulatory citations have been added to the permit.
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 Catawba County area, soliciting public comments on this draft permit.
Please provide any written comments you may have to the following: NCDEQ/DWR, NPDES
_E North Carolina Department of Environmental Quality I Division of Water Resources
rr 512 North Salisbury Street 1617 Mail Service Center I Raleigh,North Carolina 27699-1617
r•'�r o.. 919.707.9000

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 contact me at(919) 707-9130 or by email at [e-mail].
Sincerely,
T7 t2 a4.¢.‘
Diana Yitbarek,Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: Hickory -Catawba WWTP/Caleb Bynum, Keith Rhyne, Shawn Pennell
US EPA Region 4
DWR/Public Water Supply/Clinton Cook
DWR/Mooresville Regional Office(MRO)/Cory Basinger and Wes Bell
DWR/Aquatic Toxicology Branch/Zach Thomas and Cindy Moore
DWR/Operator Certification Program/Maureen Kinney
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mall Service Center I Raleigh,North Carolina 27699-1617
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nwe.n.�r, ..MruWn+� /� 919.707.9000

Permit NC0025542
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 Hickory
is hereby authorized to discharge wastewater from a facility located at the
Hickory - Catawba Wastewater Treatment Plant
104 6th Avenue NE,Catawba,NC
Catawba County
to receiving waters designated as Lyle Creek in the Catawba River Basin,in accordance with effluent
limitations,monitoring requirements,and other applicable conditions set forth in Parts I,II,III,and IV hereof.
This permit shall become effective: Month DD,2021.
This permit and authorization to discharge shall expire at midnight on April 30, 2026.
Signed this day: Month DD,2020.
DRAFT
For S.Daniel Smith,Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0025542
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.
City of Hickory is hereby authorized to
1. Continue to operate a 1.5 MGD capacity wastewater treatment facility with the following components:
• Mechanical Bar Screen, 1.5 MGD
• Grit Removal System, 1.5 MGD
• Two Oxidation Ditches,0.75 MGD each #.t
• Two Secondary Clarifiers,0.75 MGD each
• Four Tertiary Filters ` °7
• Chlorine Contact Basin
• Dechlorination
• Cascade Aerator
• Sludge Pump Station
• Two Sludge Holding Tanks
2. Discharge treated wastewater into Lyle Creek in the Catawba River Basin,classified as WS IV,CA
waters in the Catawba River Basin,through Outfall 001.The outfall location is specified on the
attached map.
3. Operate a 3.0 MGD wastewater treatment system after obtaining an Authorization to Construct from the
Division to construct and operate a 3.0 MGD wastewater treatment system.
Page 2 of 13

Permit NC0025542
PART I
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(1.5 MGD)[15A NCAC
02B .0400 et seq.,02B .0500 et seq.]Grade III Biological Water Pollution Control System[15A NCAC 08G
.0302]
a) Beginning on the effective date of this permit and lasting until expansion to 3.0 MGD or expiration,the
Permittee is authorized to discharge from Outfall 001,treated municipal 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 1.5 MGD Continuous Recording I or E
BODs(20°C)3 C0310 10.0 mg/L 15.0 mg/L 2/Week12 Composite I and E
Ammonia(NH3 as N) C0610 2.0 mg/L 6.0 mg/L 3/Week Composite I and E
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L 2/Week12 Composite I and E
Dissolved Oxygen 00300 Daily Average?6.0 mg/L 3/Week Composite E
Fecal Coliform 31616 200/100 mL 400/100 mL 2/Week12 Grab E
(Geometric Mean)
pH 00400 Between 6.0 and 9.0 standard units 3/Week Grab E
Total
(TRC)a Residual Chlorine 50060 28 µg/L 3/Week Grab E
Temperature,°C 00010 Monitor and Report Daily Grab E
Total Copper,µg/L 01042 Monitor and Report Quarterly Composite E
Total Zinc,µg/L 01094 Monitor and Report Quarterly Composite E
Bis(2-ethylhexyl) 39100 Monitor and Report Quarterly Composite E
phthalate,µg/L
Methyl Bromide" 34413 0.26 µg/L Monthly Grab E
Dichlorobromomethane, 32101 Monitor and Report Quarterly Grab E
AWL
Total Hardness s[as 00900 Monitor and Report Quarterly Composite E
CaC031,mg/L
Total Nitrogen 6(TN), C0600 Monitor and Report Monthly Composite E
mg/L
Total Phosphorus(TP), C0665 Monitor and Report Monthly Composite E
mg/L
Total Hardness s[as 00900 Monitor and Report Quarterly Grab U
CaC031,mg/L
Total Nitrogen c(TN), C0600 Monitor and Report Variable 7'8 Grab U and D
mg/L
Total Phosphorus(TP), C0665 Monitor and Report Variable 7'8 Grab U and D
mg/L
Chlorophyll A,µg/L. 32230 Monitor and Report Variable 7'8 Grab U and D
Dissolved Oxygen, 00300 Monitor and Report Variable 7,8 Grab U and D
mg/L
Temperature,°C 00010 Monitor and Report Variable 7,8 Grab U and D
Effluent Pollutant Scans' NC01 Monitor and Report Footnote 9 Footnote 9 E
Chronic Toxicity'° TGP3B See Footnote 10 Quarterly Composite E
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(6).
2. Sample Location:E—Effluent,I—Influent,U—Upstream at Highway 10,about 1000 feet from the outfall,D—Downstream
at Marina off Canvasback Ln,about 4000 feet from the outfall.
3. The monthly average effluent BOD5 and total suspended solids concentrations shall not exceed 15%of the respective influent
value(85%removal).
Page 3 of 13

Permit NC0025542
4. The Division shall consider all effluent total residual chlorine values reported below 50 ug/1 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. Variable monitoring frequency for total nitrogen,total phosphorous and chlorophyll a is defmed as follows:twice per month
during June 1 through September 30 and monthly during October 1 through May 31.
Variable monitoring frequency for dissolved oxygen and temperature is defmed as follows Samples collected three times per
week during June 1 through September 30 and once per week October 1 through May 31.
8. 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.
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit.See Special Condition A.(4).
10. Chronic Toxicity(Ceriodaphnia)P/F @ 15%February,May,August,and November.See Special Condition A.(3).
11. See Special Condition A.(7.) for the Schedule of Compliance for Methyl Bromide Limitations.
12. 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.
Page 4 of 13

r
Permit NC0025542
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(3.0 MGD) [15A NCAC
02B .0400 et seq.,02B .0500 et seq.] Grade IV Biological Water Pollution Control System[15A NCAC 08G.0302]
a) Beginning upon expansion above 1.5 MGD and lasting until expiration,the Permittee is authorized to
discharge from outfall 001,treated municipal 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 Location2
Flow 50050 3.0 MGD Continuous Recording I or E
BODs(20°C)3 C0310 5.0 mg/L 7.5 mg/L Daily Composite I and E
Apr 1-Oct 31
BODs(20°C)3 C0310 10.0 mg/L 15.0 mg/l. Daily Composite 1 and E
Nov 1-Mar 30
Ammonia(NH3 as N) C0610 1.0 mg/L 3.0 mg/L Daily Composite I and E
Apr 1-Oct 31
Ammonia(NH3 as N) C0610 2.0 mg/L 6.0 mg/L Daily Composite I and E
Nov 1-Mar 30
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Daily Composite I and E
Dissolved Oxygen 00300 Daily Average>_6.0 mg/L Daily Composite E
Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab E
(Geometric Mean)
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Total Residual Chlorine 50060 28 µg/L Daily Grab E
(TRC)
Temperature,°C 00010 Monitor and Report Daily Grab E
Total Copper,µg/L 01042 Monitor and Report Quarterly Composite E
Total Zinc,µg/L 01094 Monitor and Report Quarterly Composite E
Bis(2-ethylhexyl) 39100 5.8 µg/L Monthly Composite E
phthalate
Methyl Bromide 34413 0.15 µg/L Monthly Grab E
Dichlorobromomethane 32101 17.3 µg/L Monthly Grab E
Total Hardness[as 00900 Monitor and Report Quarterly Composite E
CaC031,mg/L
Total Nitrogen 6(TN), C0600 Monitor and Report Monthly Composite E
mg/L
Total Phosphorus(TP), C0665 Monitor and Report Monthly Composite E
mg/L
Total Hardness s[as 00900 Monitor and Report
CaCO31,mg/L Quarterly Grab U
Total Nitrogen 6(TN), C0600 Monitor and Report Variable'•" Grab U and D
mg/L
Total Phosphorus(TP), C0665 Monitor and Report Variable7'8 Grab U and D
mg/L
Chlorophyll A,µg/L 32230 Monitor and Report Variable'•" Grab U and D
Dissolved Oxygen, 00300 Monitor and Report Variable'•" Grab U and D
mg/L
Temperature,°C 00010 Monitor and Report Variable Grab U and D
Effluent Pollutant Scan' NC0/ Monitor and Report Footnote 9 Footnote 9 E
Chronic Toxicity10 TGP3B See Footnote 10 Quarterly Composite E
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Special Condition A.(6).
2. Sample Location:E—Effluent,I—Influent,U—Upstream at Highway 10,about 1000 feet from the outfall,D—Downstream
at Marina off Canvasback Ln,about 4000 feet from the outfall.
Page 5 of 13

Permit NC0025542
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/1 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. Variable monitoring frequency for total nitrogen,total phosphorous and chlorophyll a is defined as follows:twice per month
during June 1 through September 30 and monthly during October 1 through May 31.
Variable monitoring frequency for dissolved oxygen and temperature 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.
8. 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.
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit.See Special Condition A.(4).
10. Chronic Toxicity(Ceriodaphnia)P/F @ 26%February,May,August,and November.See Special Condition A.(3).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 6 of 13

Permit NC0025542
A.(3.) CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY) [15A NCAC 02B.0200 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 15%at 1.5 MGD or 26%at 3.0 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 February,May,August,and
November.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 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,North Carolina 27699-1621
Or,results can be sent to the email,ATForms.ATB(a,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 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.
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Permit NC0025542
A.(4.)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-I,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
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 I
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 1
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 CO551
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 31 t 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 j
address:
Page 8 of 13

Permit NC0025542
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 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:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
Or,results can be sent to the email,[e-mail].
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.(5.) MERCURY MINIMIZATION PLAN(MMP) @ 3 MGD [G.S. 143-215.1(b)]
The permittee shall develop and implement a mercury minimization plan once the existing plant completes the
upgrade to 3.0 MGD. The MMP shall be developed within 180 days after the start-up of the 3 MGD WWTP,
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://portal.ncdenr.org/web/wq/swp/ps/npdes,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.(6.)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
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Permit NC0025542
• 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. The eDMR system may be accessed at:
https://deq.nc.gov/about/divisions/water-resources/edmr
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 following mailing address:
NC DEQ/Division of Water Resources/Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
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
• 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
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Permit NC0025542
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-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. Siunatory Requirements [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.
(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."
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Permit NC0025542
5. Records Retention ISuaalements 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].
A.(7.)SCHEDULE OF COMPLIANCE FOR METHYL BROMIDE LIMITATIONS(OUTFALL 001)
[G.S. 143-215.1(b)]
1. Within one year from the effective date of the permit,the Permittee shall submit to the Division of
Water Resources a Corrective Action Plan summarizing the actions or strategy to be taken to achieve
compliance with the methyl bromide limits at outfall 001. Specific dates for completion or
implementation of each action shall be included.
2. Within two years from the effective date of the permit,the Permittee shall identify sources of the
pollutant and evaluate source reduction alternatives.The Permittee shall submit a report to the Division
summarizing actions taken in accordance with the Corrective Action Plan.
3. Within three years from the effective date of the permit,the Permittee shall achieve compliance with
methyl bromide limits specified in Section A.(1).
Upon approval of the Corrective Action Plan by the Division,the report and actions become an enforceable part
of this permit.Any modifications to the schedule shall be requested to the Division at least ninety(90)days
before the deadline.Modifications to the schedule in excess of four months will be subject to public notice.
A.(8.)INDUSTRIAL WASTE SURVEY [G.S. 143-215.1(b)]
The Permittee shall submit an industrial waste survey(IWS) 180 days after the permit issuance.The IWS shall
be submitted to the NPDES Municipal Permitting Unit at the following address:
NC DEQ/Division of Water Resources/NPDES Municipal Permitting Unit/Pretreatment
1617 Mail Service Center
Raleigh,NC 27699-1617
Page 12 of 13

Permit No.NC0025542
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Hickory-Catawba WWTP-NC0025542 N Facility Location (Not to scale)
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Receiving Stream: Lyle Creek Stream Class: WS IV,CA
Drainage Basin: Catawba River Basin Stream Segment: 11-76-(4.5)
Permitted Flow: 1.5 and 3.0 MGD Sub-Basin: 03-08-32
Outfall 001 Location: 35°42'55.3"N 81°04'25.8"W HUC: 03050101 Latitude 35°42'54"N Longitude 81°04'27"W
State Grid/USGS Quad:E14NE/Catawba
Page 13 of 13