NC0024252_Draft Permit_20221004

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ROY COOPER " ' L
Governor ' r,
ELIZABETH S.BISER
Secretory * *
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
October 4, 2022
Mr. Brian Bradshaw, Public Utilities Director
City of Conover
PO Box 549
Conover,North Carolina 28613
Subject: Draft NPDES Permit Renewal
Permit NC0024252
Northeast WWTP
Catawba County
Grade III/IV Biological WPCS
SIC Code 4952
Dear Mr. Bradshaw:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
• Based on the reasonable potential analysis (RPA) showing reasonable potential to violate
state water quality standards at the 3.0 MGD flow tier,total zinc limits have been added to the
permit and the quarterly monitoring requirement has been changed to monthly monitoring [See
A.(3.)].
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards, the limits and monitoring requirement for total copper
have been removed from the permit [See A.(1), A.(2.) and A.(3.)].
• To track total nitrogen constituents, monthly TKN and NO2 +NO3 reporting has been
added to the permit [See A.(1), A.(2.) and A.(3.)].
• A special condition to monitor effluent PFAS chemicals 2/year has been added to the
permit, to be effective six (6) months after EPA has a final wastewater method in 40 CFR 136
method published in the Federal Register [See Special Condition A.(8.) PFAS Monitoring
Requirements].
• To compile the instream monitoring requirements for ease of reference, Special
Condition A.(4.) Instream Monitoring Requirements has been added to the permit.
• Based on review of 2018 Lyle Creek study data and discussion with the Basin Planning
Branch and Mooresville Regional Office, instream turbidity and fecal coliform monitoring
have been added to the permit [See Special Condition A.(4.) Instream Monitoring
Requirements].
• Based on review of the 2018 Catawba River Basin Nutrient Study, and discussion with the
Basin Planning Branch indicating the development of a basin plan for the Catawba River Basin
within the permit cycle, instream monitoring for ammonia, TKN, NO2+NO3, TN, and TP has
been added to the permit at a once per month frequency [See Special Condition A.(4.)Instream
Monitoring Requirements].
3North
2North Carolina DepartmentStreet o1 f161 Env1irMailmonental QualityCenter I DI iRavisionleigh of
Nor WaterthCarolina 1 .
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Salisbury Service 699-1611
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• The City of Conover reported Total Silver at less than detection, with detection levels <
10.0 µg/L, and < 5.0 µg/L, and < 1.0 µg/L in their DMR results. The Town's allowable
discharge concentration is 0.125 µg/L for Total Silver. DWR's laboratory identifies the target
Practical Quantification Limit(PQL) for Total Silver as 1.0 µg/L. 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 are capable
of achieving a detection level below the permit discharge requirement(or allowable discharge
concentration) the method with the lowest detection level must be used. The City should use
sufficiently sensitive test methods for all pollutants, including when performing Effluent
Pollutant Scans. To verify the City's effluent is absent of silver, quarterly monitoring has been
maintained in the permit for the duration of 1 year past the effective date of the permit. Should
the City report no detections of total silver at the appropriate PQL, the total silver monitoring
requirement may cease without reopening the permit. Should the City detect silver at this lower
PQL during this duration, quarterly silver monitoring shall be maintained for the duration of
the permit cycle. [ See A.(1.), A.(2.), and A.(3.)].
• Some of the wording has changed in Special Condition A.(5.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
• Special Condition A.(6.)has been modified to include the specific three years in which the
Effluent Pollutant Scan shall be performed (2024, 2025, and 2026). In addition, at the end of
the Special Condition, 2°d species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.21(j)(5)] have been added.
• 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.
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
[ See A.(1.),A.(2.), and A.(3.)].
The NPDES standard conditions(Parts II, III, and IV)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/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
Permitting Branch, 1617 Mail Service Center, Raleigh,NC 27699-1617 no later than 30 days
after receipt of this draft permit.
Following the 30-day public comment period, the Division will review all pertinent comments
and take appropriate action prior to issuing a final permit. If you have questions concerning this
draft permit,please call me at(919) 707-3609 or by email at [e-mail].
Sincerely,
oowslon.a by:
7900A4FBFCA14FD
Nick Coco, PE
NPDES Municipal Permitting Unit
E Q North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 11611 Mail Service Center I Raleigh.North Carolina 27699-1611
;;;1. 1 a E.. r a..er\ 919 707 9000

Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Mooresville Regional Office/Water Quality/Corey Basinger and Wes Bell
DWR/Operator Certification Program/Maureen Kinney
DWR/Aquatic Toxicology Branch/Cindy Moore
DWR/Basin Planning Branch/Nora Deamer
City of Conover/Asst. Public Utilities Director/Eric Williams
North Catalina Deparunent of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh.North Carolina 27699-1611
919.707.9000
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Permit NC0024252
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1,other lawful standards
P
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission,and the Federal Water Pollution Control Act, as amended,the
City of Conover
is hereby authorized to discharge wastewater from a facility located at the
Northeast WWTP
3680 Hillview Drive
Conover
Catawba County
to receiving waters designated as Lyle Creek in the Catawba River Basin
in accordance with the effluent limitations,monitoring requirements,and other applicable 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 November 30,2027.
Signed this day Month xx, 20xx.
DRAFT
for Richard E.Rogers,Jr.,Director
Division of Water Resources
By Authority of the Environmental Management
Commission
Page 1of16

Permit NC0024252
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 Conover
is hereby authorized to:
1. Continue to operate and maintain the Northeast WWTP,an existing 1.5 MGD facility consisting of
the following components:
• mechanical bar screen
• aerated grit chamber
• influent composite sampler
• influent pump station and metering flume
• four(4)sequential batch reactors
• five(5)tertiary effluent sand filter cells
• chlorination with sodium hypochlorite
• dechlorination with sodium bisulfite
• cascade post-aeration
• effluent composite sampler
• aerated sludge holding tank and sludge thickening facilities
2. After receiving an Authorization to Construct from the Division, to construct and operate a 1.9 MGD
facility utilizing approved modifications to the facility's treatment components.
3. After receiving an Authorization to Construct from the Division, to construct and operate a 3.0 MGD
facility utilizing approved modifications to the facility's treatment components.
4. Discharge from said treatment works at the location specified on the attached map via Outfall 001
into Lyle Creek,classified C waters in the Catawba River Basin.
Page 2 of 16

Permit NC0024252
PART I
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [1.5 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade III
Biological Water Pollution Control System [15A NCAC 08G .0302]
(a.) Beginning on the effective date of the permit and lasting until submittal of Engineer's Certificate
for expansion above 1.5 MGD or permit expiration,whichever is sooner,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:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location
Flow 50050 1.5 MGD Continuous Recording I or E
BOD,5 day,20°C 3
(Apr 1 -Oct 31) C0310 8.0 mg/L 12.0 mg/L 3/Week Composite I and E
BOD,5 day,20°C 3
C0310 16.0 mg/L 24.0 mg/L 3/Week Composite I and E
(Nov 1 -Mar 31)
Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L 3/Week Composite I and E
NH3 asN
(Apr 1 Oct 31) C0610 2.0 mg/L 6.0 mg/L 3/Week Composite E
NH3 as N
C0610 4.0 mg/L 12.0 mg/L 3/Week Composite E
(Nov 1 -Mar 31)
Fecal Coliform 31616 200/100 mL 400/100 mL 3/Week Grab E
(geometric mean)
Dissolved Oxygen 00300 Daily Average 2 5.0 mg/L 3/Week Grab E
pH 00400 Between 6.0 and 9.0 Standard Units 3/Week Grab E
Temperature(°C) 00010 Monitor and Report Daily Grab E
Total Residual Chlorine 4 50060 28 µg/L 3/Week Grab E
Total Phosphorus(mg/L) C0665 Monitor and Report Monthly Composite E
TKN(mg/L) 00625 Monitor and Report Monthly Composite E
NO3-N+NO2-N (mg/L) 00630 Monitor and Report Monthly Composite E
Total Nitrogen 5 (mg/L) C0600 Monitor and Report Monthly Composite E
Total Silver(µg/L)6 01077 Monitor and Report Quarterly Composite E
Total Zinc(pg/L) 01092 Monitor and Report Quarterly Composite E
Chronic Toxicity 7 TGP3B Monitor and Report Quarterly Composite E
Effluent Pollutant Scan 8 NC01 Monitor and Report Footnote 7 Footnote 7 E
Hardness'-Total as CaCO3(mg/L) 00900 Monitor and Report Quarterly Composite E
PFAS Various Footnote 10 Footnote 10 Grab E
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(9.).
2. Sample locations I-Influent,E-Effluent. See Special Condition A.(4.)for Instream Monitoring Requirements.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15%of the
respective influent value(85%removal).
4. The facility shall monitor TRC when using chlorination for disinfection.The Division shall consider all effluent
total residual chlorine values reported below 50 µg/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 µg/l.
Footnotes continue on the next page.
Page 3 of 16

Permit NC0024252
Footnotes continued from A.(1.)Effluent Limitations and Monitoring Requirements:
5. For a given wastewater sample,TN=TKN+NO3-N+NO2-N,where TN is Total Nitrogen,TKN is Total
Kjeldahl Nitrogen,and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen,respectively.
6. Total silver monitoring shall be conducted using a PQL of 1 ug/L.Should the facility report all quarterly total
silver samples as non-detect at the appropriate PQL for a period lasting one year from the effective date of the
permit,total silver monitoring may cease without the need for reopening the permit.Total silver monitoring is
still required as part of the 3 effluent pollutant scans(See Special Condition A.(6.)).
7. Chronic Toxicity(Ceriodaphnia dubia)P/F at 32%with testing in March,June,September,and December.See
Special Condition A.(5.).
8. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(6.).
9. Effluent hardness shall be performed in conjunction with testing for hardness dependent metals(cadmium,
copper,lead,nickel,silver,and zinc).
10. See Special Condition A.(8.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 16

Permit NC0024252
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [1.9 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade III
Biological Water Pollution Control System [15A NCAC 08G .0302]
(a.) Beginning upon receipt of the Engineer's Certification for completion of the expansion to 1.9 MGD
and lasting until expansion above 1.9 MGD' or permit expiration,whichever is sooner,the
permittee is authorized to discharge treated municipal wastewater from Outfall 001. Such
discharges shall be limited and monitored2 by the permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location
Flow 50050 1.9 MGD Continuous Recording I or E
BOD,5 day,20°C 4
(Apr 1-Oct 31) C0310 8.0 mg/L 12.0 mg/L 3/Week Composite I and E
BOD,5 day,20°C 4 C0310 16.0 mg/L 24.0 mg/L 3/Week Composite I and E
(Nov 1 -Mar 31)
Total Suspended Solids4 C0530 30.0 mg/L 45.0 mg/L 3/Week Composite I and E
NH3 as N C0610 2.0 mg/L 6.0 mg/L 3/Week Composite E
(Apr l-Oct 31)
NH3 asN
(Nov 1 -Mar 31) C0610 4.0 mg/L 12.0 mg/L 3/Week Composite E
Fecal Coliform 31616 200/100 mL 400/100 mL 3/Week Grab E
(geometric mean)
Dissolved Oxygen 00300 Daily Average?5.0 mg/L 3/Week Grab E
pH 00400 Between 6.0 and 9.0 Standard Units 3/Week Grab E
Temperature(°C) 00010 Monitor and Report Daily Grab E
Total Residual Chlorine 5 50060 28 µg/L 3/Week Grab E
Total Phosphorus(mg/L) C0665 Monitor and Report Monthly Composite E
TKN(mg/L) 00625 Monitor and Report Monthly Composite E
NO3-N+NO2-N (mg/L) 00630 Monitor and Report Monthly Composite E
Total Nitrogen 6 (mg/L) C0600 Monitor and Report Monthly Composite E
Total Silver(µg/L)7 01077 Monitor and Report Quarterly Composite E
Total Zinc(µg/L) 01092 Monitor and Report Quarterly Composite E
Chronic Toxicity 8 TGP3B Monitor and Report Quarterly Composite E
Effluent Pollutant Scan 9 NC01 Monitor and Report Footnote 8 Footnote 8 E
Hardness1°-Total as CaCO3 00900 Monitor and Report Quarterly Composite E
(mg/L)
PFAS Various Footnote 11 Footnote 11 Grab E
Footnotes:
1. Before submitting an Authorization to Construct application for expansion to 3.0 MGD the permittee shall
submit a flow justification to the NPDES Municipal Permitting Unit describing projected flows for a 20-year
planning period;see Special Condition A(7.)FLOW JUSTIFICATION FOR EXPANSION TO 3.0 MGD.
2. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(9.).
3. Sample locations I-Influent,E-Effluent. See Special Condition A.(4.)for Instream Monitoring Requirements.
4. The monthly average effluent BODS and Total Suspended Solids concentrations shall not exceed 15%of the
respective influent value(85%removal).
Footnotes continue on the next page.
Page 5 of 16

Permit NC0024252
Footnotes continued from A.(2.)Effluent Limitations and Monitoring Requirements:
5. The facility shall monitor TRC when using chlorination for disinfection.The Division shall consider all effluent
total residual chlorine values reported below 50 141 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. For a given wastewater sample,TN=TKN+NO3-N+NO2-N,where TN is Total Nitrogen,TKN is Total
Kjeldahl Nitrogen,and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen,respectively.
7. Total silver monitoring shall be conducted using a PQL of 1 ug/L.Should the facility report all quarterly total
silver samples as non-detect at the appropriate PQL for a period lasting one year from the effective date of the
permit,total silver monitoring may cease without the need for reopening the permit.Total silver monitoring is
still required as part of the 3 effluent pollutant scans(See Special Condition A.(6.)).
8. Chronic Toxicity(Ceriodaphnia dubia)P/F at 37%with testing in March.June,September,and December.See
Special Condition A.(5.).
9. The permittee shall perform three effluent pollution scans during the term of this permit.See Special Condition
A.(6.).
10. Effluent hardness shall be performed in conjunction with testing for hardness dependent metals(cadmium,
copper,lead,nickel,silver,and zinc).
11. See Special Condition A.(8.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 6 of 16

Permit NC0024252
A.(3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [3.0 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
(a.) During the period beginning upon expansion to 3.0 MGD' and lasting until permit expiration,the
permittee is authorized to discharge treated municipal wastewater from Outfall 001. Such
discharges shall be limited and monitored2 by the permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location3
Flow 50050 3.0 MGD Continuous Recording I or E
BOD,5 day,20°C° C0310 8.0 mg/L 12.0 mg/L Daily Composite I and E
(Apr 1 -Oct 31)
BOD,5 day,20°C 4
(Nov 1 Mar 31) C0310 16.0 mg/L 24.0 mg/L Daily Composite I and E
Total Suspended Solids4 C0530 30.0 mg/L 45.0 mg/L Daily Composite I and E
NH3 as N
(Apr 1-Oct 31) C0610 2.0 mg/L 6.0 mg/L Daily Composite E
NH3 as N C0610 4.0 mg/L 12.0 mg/L Daily Composite E
(Nov 1 -Mar 31)
Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab E
(geometric mean)
Dissolved Oxygen 00300 Daily Average>5.0 mg/L Daily Grab E
pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab E
Temperature(°C) 00010 Monitor and Report Daily Grab E
Total Residual Chlorine 5 50060 28 µg/L Daily Grab E
Total Phosphorus(mg/L) C0665 Monitor and Report Monthly Composite E
TKN(mg/L) 00625 Monitor and Report Monthly Composite E
NO3-N+NO2-N (mg/L) 00630 Monitor and Report Monthly Composite E
Total Nitrogen 6(mg/L) C0600 Monitor and Report Monthly Composite E
Total Silver(µg/L)7 01077 Monitor and Report Quarterly Composite E
Total Zinc 01092 251.9 µg/L 251.9 µg/L Quarterly Composite E
Chronic Toxicity 8 TGP3B Monitor and Report Quarterly Composite E
Effluent Pollutant Scan 9 NC01 Monitor and Report Footnote 8 Footnote 8 E
Hardness1°-Total as CaCO3 00900 Monitor and Report Quarterly Composite E
(mg/L)
PFAS Various Footnote 11 Footnote 11 Grab E
Footnotes:
1. Before submitting an Authorization to Construct application for expansion to 3.0 MGD the permittee shall
submit a flow justification to the NPDES Municipal Permitting Unit describing projected flows for a 20-year
planning period;see Special Condition A.(7.)FLOW JUSTIFICATION FOR EXPANSION TO 3.0 MGD.
2. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(9.).
3. Sample locations I-Influent,E-Effluent. See Special Condition A.(4.)for Instream Monitoring Requirements.
4. The monthly average effluent BODS and Total Suspended Solids concentrations shall not exceed 15%of the
respective influent value(85%removal).
Footnotes continue on the next page.
Page 7 of 16

Permit NC0024252
Footnotes continued from A.(3.)Effluent Limitations and Monitoring Requirements:
5. The facility shall monitor TRC when using chlorination for disinfection.The Division shall consider all effluent
total residual chlorine values reported below 50 µg/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 µg/l.
6. For a given wastewater sample,TN=TKN+NO3-N+NO2-N,where TN is Total Nitrogen,TKN is Total
Kjeldahl Nitrogen,and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen,respectively.
7. Total silver monitoring shall be conducted using a PQL of 1 ug/L.Should the facility report all quarterly total
silver samples as non-detect at the appropriate PQL for a period lasting one year from the effective date of the
permit,total silver monitoring may cease without the need for reopening the permit.Total silver monitoring is
still required as part of the 3 effluent pollutant scans(See Special Condition A.(6.)).
8. Chronic Toxicity(Ceriodaphnia dubia)P/F at 48%with testing in March,June,September,and December.See
Special Condition A.(5.).
9. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(6.).
10. Effluent hardness shall be performed in conjunction with testing for hardness dependent metals(cadmium,
copper,lead,nickel,silver,and zinc).
11. See Special Condition A.(8.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 8 of 16

Permit NC0024252
A.(4.) INSTREAM MONITORING REQUIREMENTS
[15A NCAC 02B .0500 et seq.]
Instream monitoring is required for the following parameters at the locations specified:
MONITORING FREQUENCY
PARAMETER SAMPLE SAMPLE
TYPE June 1— October 1— LOCATION'
Parameter Code September 30 May 31
Hardness2-Total as CaCO3(mg/L) 00900 Grab Quarterly U
NH3 as N(mg/L) C0610 Grab Monthly U,D
Total Phosphorus(mg/L) C0665 Grab Monthly U,D
TKN(mg/L) 00625 Grab Monthly U,D
NO3-N+NO2-N (mg/L) 00630 Grab Monthly U,D
Total Nitrogen(mg/L) C0600 Grab Monthly U,D
Dissolved Oxygen (mg/L) 00300 Grab 3/Week 1/Week U,D
Temperature(°C) 00010 Grab 3/Week 1/Week U,D
Turbidity(NTU) 00070 Grab 3/Week 1/Week U,D
Fecal Coliform(#/100mL) 31616 Grab 3/Week 1/Week U,D
Footnotes:
1. Sample locations U-Upstream 75-feet from outfall; D-Downstream approximately two miles,end of
road at Rock Barn Pump Station 1.
2. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall
be representative of the hardness in the stream.
A.(5.) CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY)
[15A NCAC 02B .0200] [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 32% at 1.5 MGD,37°Ao at 1.9 MGD
and 48% 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
March,June,September,and December. 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 H 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:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Page 9 of 16

Permit NC0024252
Or,results can be sent to the email,[e-mail].
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.
Page 10 of 16

Permit NC0024252
A.(6.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL
[G.S. 143-215.1(B)] 1
(a.) Effluent Pollutant Scans. 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: 2024,
2025,and 2026. 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.Each annual sample shall coincide with one quarterly toxicity test
each year(see Condition A.(4.)(CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY))),and
each must be collected in a different calendar quarter to 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
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 01041 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(PQL<1 ug/L) 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
Page 11 of 16

Permit NC0024252
(b.) Effluent Scan Reporting. Test results shall be reported electronically via eDMR by December
31st of each designated sampling year,except that, subject to prior written approval by the Director,
results can be reported on DWR Form DMR-PPA-1 or other form approved by the Director. 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 written reports are approved,the report shall be
submitted to the following address:
North Carolina Division of Water Resources
Central 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
(c.) 2°'-Species Toxicity Testing and Reporting.
(i.) In addition to the quarterly toxicity tests required in Condition A.(4.) (CHRONIC TOXICITY
PERMIT LIMIT(QUARTERLY)),the Permittee shall perform and report the results of four
(4)toxicity tests using the same test methods using a second species of test organism suitable
to the tests being conducted.
(ii.) The 2nd species toxicity tests shall be conducted either:
(A) Once per quarter in a single 12-month period(four samples); if this option is chosen,
the sample for each 2nd species test shall coincide with the quarterly samples collected
for(tox condition title); or
(B) Once per 12-month period in the four-and one-half year period prior to the scheduled
application for permit renewal(four samples); if this option is chosen, three of the
sample for the 2nd species test shall coincide with those for the annual effluent scans
and the coincident quarterly toxicity test,and each of the four annual samples shall be
collected in a different calendar quarter in order to represent seasonal variation.
(iii.) The results of the toxicity tests shall be submitted to 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].
(iv.) Results of the 2"d species tests shall also be summarized in Part E(Toxicity Testing Data)of
EPA Municipal Application Form 2A when submitting the permit renewal application to the
NPDES Wastewater Program.
The Permittee may contact the Division's Aquatic Toxicology Branch at 919-743-8401 for
guidance on conducting the additional toxicity tests and reporting of the results.
Page 12 of 16

Permit NC0024252
A.(7.) FLOW JUSTIFICATION FOR EXPANSION TO 3.0 MGD
[15A NCAC 02H .0105(c)(1)]
The Permittee shall submit a flow justification for 3.0 MGD to the Division of Water Resources for
review and approval before submitting an Authorization to Construct application for 3.0 MGD. The flow
justification must include flow projections for future commercial, residential, and industrial flows for a
20-year planning period.The justification shall be submitted to the NPDES Municipal Permitting Unit at
the following address:
NPDES Municipal Permitting Unit
1617 Mail Service Center
Raleigh,NC 27699-1617
A.(8.) PFAS MONITORING REQUIREMENT
[G.S. 143-215.1(b.)]
This reporting requirement for the per- and polyfluoroalkyl substances (PFAS) parameters listed under
Table 1 of the Final Method 1633 takes effect the first full calendar quarter following six(6)months after
EPA publishes a 40 CFR part 136 Final PFAS Method for wastewater in the Federal Register. Monitoring
will be at a 2/year frequency.
Find the current parameters listed under Table 1 of the August 2021 Draft Method 1633 Analysis of Per-
and Polyfluoroalkyl Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS
at:
https://www.epa.gov/system/files/documents/2021-09/method 1633 draft aug-2021.pdf
A.(9.) ELECTRONIC REPORTING-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.) (all
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. The eDMR system may be
accessed at: https://deq.nc.gov/about/divisions/water-resources/edmr.
Page 13 of 16

Permit NC0024252
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 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.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
reported via the eDMR system no later than the last calendar day of the month following the
completed reporting period. 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 21,2025,the permittee must electronically report the following compliance
monitoring data and reports,when applicable:
• Sewer Overflow/Bypass Event Reports; and
• 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-discharge-elimination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the"Reporting Requirements"section above.
Page 14 of 16

Permit NC0024252
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/edinr
4. Signatory 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."
5. Records Retention [Supplements Section D.(6.)i
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions.
These records or copies shall be maintained for a period of at least 3 years from the date of the report.
This period may be extended by request of the Director at any time[40 CFR 122.41].
Page 15 of 16

Permit NC0024252
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Longitude: 81° 11'25"W 81° 11' 25.1"R'
Stream Class C Facility Location
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Subbasin_ 03-08-32 HUC: 03050101 Northeast \VWTP NC0024252
Receiving Stream_ Lyle Creek Catawba County
Page 16 of 16