NC0024228_Draft Permit_20201217

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ROY COOPER { Iii/'j1j
MICHAEL S.REGAN
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Secretary
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
December 17, 2020
Mr. Terry Houk,Director of Public Services
City of High Point
P.O. Box 230
High Point,North Carolina 27261
Subject: Draft NPDES Permit Renewal
Permit NC0024228
Westside WWTP
Davidson County
Facility Class IV
SIC Code 4952
Dear Mr. Houk:
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:
• City of High Point has been operating the Westside WWTP at 8.2 MGD since April 1,
2020. As such, Effluent Limitations and Monitoring Requirements for the 6.2 MGD flow
tier have been removed from the permit.
• The component list has been updated to reflect the modified treatment system with a design
capacity of 10 MGD.
• The stream restoration condition has been removed for 10 MGD expansion because recent
monitoring and modeling results have demonstrated that the physical properties of Rich
Fork Creek have changed over the past decade, and the creek has improved assimilative
capacity over conditions existing in 2007. Results of the modeling have shown that under
both 8.2 MGD and 10 MGD flow conditions, Rich Fork Creek is capable of assimilating
these effluent flow scenarios under critically low 7Q10 conditions. The revised FONSI
which removed the stream restoration condition was reviewed and approved by State
Clearinghouse in May 2020.
• Special conditions regarding identifying potential causes of significant changes to water
quality conditions and hydromorphology have been added to the permit. See footnote 10
in A. (2.).
• Based on an updated QUAL2K model developed in 2019, the monthly average BOD5
limits at 10 MGD have been changed to 4 mg/L for summer and 8 mg/L for winter[See A.
(2.)].
• The TRC limit at 10 MGD has been updated to 18 ug/L per toxicity based TRC
wasteload allocation.
DE � North Carolina Department of Environmental Quality I Division of Water Resources
$12 North Salisbury Street 11617 Mall Service Center I Ralegh,North Carolina 27699-1617
r+r� /� 919.707.9000

• Based on the reasonable potential analysis (RPA) showing reasonable potential to violate
state water quality standards,the monitoring frequency for Copper has been changed from
quarterly to monthly.
• Results of an RPA of effluent sampling data for Zinc showed no reasonable potential to
violate NC water quality standards, but the maximum predicted concentration was more
than half of the allowable concentration. Quarterly monitoring for Zinc has been added to
the permit.
• Results of an RPA of effluent sampling data for Total Recoverable Phenolics showed
reasonable potential to violate NC water quality standards but the results were based on
limited dataset. Quarterly monitoring for Total Recoverable Phenolics has been added to
the permit.
• Based on the RPA showing no reasonable potential to violate state water quality standards,
the limit for Mercury and the monitoring requirement for Total Silver have been removed
from the permit.
• A mercury minimization plan(MMP)has been maintained in the permit since quantifiable
levels of mercury(> 1 ng/l) were reported. Results of the MMP shall be summarized and
submitted with the next permit renewal [See A. (6.)].
• The NC 2007-2014 Water Quality Standard(WQS)Triennial Review was approved by
the NC Environmental Management Committee(EMC)on November 13,2014. The US
EPA subsequently approved the WQS revisions on April 6,2016 with some exceptions.
The NC Division of Water Resources NPDES Permitting Unit is required to implement
the new dissolved metal standards in all permits public noticed after April 6, 2016. The
new standards for most metals include acute standards. Further,the freshwater standards
for several metals are expressed as the dissolved form of the metals,and seven metals
have hardness-dependent equations. As a result,the NPDES Permitting Unit will need
site-specific effluent hardness data and instream hardness data,upstream of the discharge,
for each facility monitoring these metals in order to calculate permit limitations. Effluent
hardness and instream hardness sampling,upstream of the discharge,have been added to
P g P g
the permit at a monitoring frequency of quarterly[See A. (1.)and A. (2.)].
• Some of the wording has changed and an email address for electronic submittal of
toxicity testing results has been added in Special Condition A. (3.),Chronic Toxicity
Permit Limit.Please review each paragraph carefully.
• Special Condition A. (4.)has been modified to include the specific three years in which
the Effluent Pollutant Scan shall be performed(2022,2023,2024),and to allow for
electronic submittal. In addition,at the end of the Special Condition,2nd 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.The current compliance date,effective January 4, 2021,was extended as a fmal
regulation change published in the November 2,2020 Federal Register.
• 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. (7.)].
• Parameter codes have been added to the Effluent Limitations and Monitoring
Requirements [See A. (1.)and A. (2.)] and the Effluent Pollutant Scan[See A. (4.)].
• Regulatory citations have been added to the permit.
Page 2 of 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 Davidson 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)707-3644 or by email at [e-mail].
Sincerely,
EDocuSigned by:
l Lit, XL;G-is-
50 0C9F 04F7...
MmAiao,Engmeer
NPDES Complex Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Winston-Salem Regional Office/Water Quality
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Aquatic Toxicology Branch/Cindy Moore
DWR/Operator Certification Program/Maureen Kinney
Page 3 of 3

Permit NC0024228
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1,other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission,and the
Federal Water Pollution Control Act,as amended,
City of High Point
is hereby authorized to discharge wastewater from a facility located at the
Westside Wastewater Treatment Plant
1044 West Burton Road
Thomasville
Davidson County
to receiving waters designated as Rich Fork Creek in the Yadkin-Pee Dee River Basin in accordance with effluent
limitations,monitoring requirements,and other conditions set forth in Parts I,II,III and IV hereof.
This permit shall become effective Month XX, 202X.
This permit and authorization to discharge shall expire at midnight on Month XX,202X.
Signed this day Month XX, 202X.
Draft
S. Daniel Smith,Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0024228
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility,whether for operation or discharge are hereby revoked,and as
of this issuance,any previously issued permit bearing this number is no longer effective.Therefore,the exclusive
authority to operate and discharge from this facility arises under the permit conditions,requirements,terms,and
provisions included herein.
The City of High Point is hereby authorized to:
1. Continue to operate an 8.2 MGD wastewater treatment facility consisting of the following components:
• One(1)mechanical coarse bar rack and screenings conveyor
• Four(4)vertical turbine lift pumps
• Two(2)mechanical and one(1)manual fine bar screens with screenings presses
• Two(2)cyclone-stirred vortex grit tanks with two(2)grit classifiers
• Three(3)influent parshall flumes
• Dual tower wet scrubber system for odor control
• Two(2)flow equalization basins
• Two(2)primary clarifiers
• 5-stage BNR activated sludge tanks
• Two(2)alum storage tanks for phosphorous removal
• Three(3)secondary clarifiers
• Five(5)tertiary sand filters
• Two(2)sludge holding tanks
• Centrifuge
• Rotary drum thickener
• Dual train UV disinfection
• Effluent pump station
This facility is located at Westside Wastewater Treatment Plant, 1044 West Burton Road,Thomasville, in
Davidson County.Westside WWTP is currently rated a Class IV facility.
2. After receiving the proper Authorization to Operate a 10 MGD WWTP from the Division of Water Quality,
operate the Westside WWTP at a permitted flow of 10 MGD.
3. Discharge from said treatment works at the location specified on the attached map into Rich Fork Creek,
which is classified C water in the Yadkin-Pee Dee River Basin.
Page 2 of 14

Permit NC0024228
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (8.2 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302]
During the period beginning on the effective date of this permit and lasting until expiration or expansion,the
Permittee is authorized to discharge up to 8.2 MGD treated wastewater through Outfall 001. Such discharges
shall be limited and monitored 'by the Permittee as specified below:
EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Flow 50050 8.2 MGD Continuous Recording I or E
BOD,5-day,20°C 3 C0310 4.9 mg/L 7.4 mg/L Daily Composite I&E
(April 1 —October 31)
BOD,5-day,20°C 3 C0310 9.8 mg/L 14.8 mg/L Daily Composite I&E
(November 1 —March 31)
Total
(TSS)Suspended Solids C0530 30.0 mg/L 45.0 mg/L Daily Composite I&E
NH3 as N
(April 1 -October 31) C0610 1.0 mg/L 3.0 mg/L Daily Composite E
NH3 as N C0610 2.0 mg/L 6.0 mg/L Daily Composite E
(November 1 -March 31)
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Dissolved Oxygen(DO) 00300 Daily average>7.0 mg/L Daily Grab E
Fecal Coliform 200/100 400/100
31616 Daily Grab E
(geometric mean) mL mL
Total
(TRC)a Residual Chlorine 50060 17 µg/L Daily Grab E
Temperature(°C) 00010 Monitor and Report Daily Grab E
Total Nitrogen 5 QM600 159,870 lb/year Weekly Composite E
(TKN+NO2-N+NO3-N) (annual load)
Total Phosphorus 5 QM665 13,341 lb/year Weekly Composite E
(annual load)
Total Copper(µg/L) 01042 Monitor and Report Monthly Composite E
Total Zinc(µg/L) 01092 Monitor and Report Quarterly Composite E
Total Recoverable
Phenolics(µg/L) 32730 Monitor and Report Quarterly Composite E
Total Hardness[as CaCO3] 00900 Monitor and Report Quarterly Composite E
(mg/L)6
Total Hardness[as CaCO3] Report 00900 Monitor and QuarterlyGrab U
(mg/L)7 P
Chronic Toxicity 8 TGP3B Monitor and Report Quarterly Composite E
Effluent Pollutant Scan NC01 Monitor and Report Footnote 9 Footnote 9 E
Page 3 of 14

Permit NC0024228
EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Fecal Coliform
(geometric mean) 31616 Monitor and Report Footnote 2 Grab U,D1,D2
Dissolved Oxygen(mg/L) 00300 Monitor and Report Footnote 2 Grab U,Dl,D2
Temperature(°C) 00010 Monitor and Report Footnote 2 Grab U,Dl,D2
Conductivity(µmhos/cm) 00094 Monitor and Report Footnote 2 Grab U,D1,D2
Total Phosphorus(mg/L) C0665 Monitor and Report June—Sept. Grab U,D1,D2
1/month
Total Nitrogen(mg/L) C0600 Monitor and Report June—Sept. Grab U,D1,D2
1/month
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system[see A. (7.)].
2. Sample locations:I-Influent,E-Effluent,U—Upstream at Rich Fork Creek at NCSR1757-Chestnut Street
above the outfall, D1 -Downstream at NCSR 1792, D2 - Downstream at NCSR 2123 upstream of Abbotts
Creek. Except for instream total phosphorus and total nitrogen, other instream samples shall be collected
3/Week during the months of June, July, August, and September and Weekly during the remainder of the
year. Instream monitoring for fecal conform, dissolved oxygen, temperature, conductivity, total
phosphorus and total nitrogen are provisionally waived in light of the permittee's participation in the
Yadkin-Pee Dee River Basin Association (provided the sampling frequency monthly or greater).
Instream monitoring will be immediately reinstated and the Division shall be notified immediately
should the permittee end its participation in the Association.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15%of the
respective influent value(85%removal).
4. Limit and monitoring apply only if chlorine or chlorine derivatives are used for disinfection.The Division
shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit.
However,the Pennittee shall record and submit all values reported by a North Carolina certified laboratory
(including field certified),even if these values fall below 50 µg/L.
5. See A.(5.)CALCULATION AND REPORTING OF NUTRIENT LOADS for details.
6. Effluent Total Hardness sampling shall be conducted in conjunction with effluent metals for the
pretreatment program(cadmium,copper,lead,nickel,silver,and zinc).
7. The permittee shall sample instream hardness upstream of the facility's discharge.The sample shall be
representative of the hardness in the receiving stream.If the permittee is a member of a monitoring
coalition program,sampling for instream hardness may be waived as long as the monitoring coalition
agrees to sample hardness at the nearest upstream location,at a minimum frequency of quarterly, and the
•permittee has obtained approval from DWR-NPDES Permitting Unit that the upstream station being
monitored by the Coalition is representative of the receiving stream for this discharge.The permittee is
responsible for submitting instream hardness test results with its permit renewal application package. If
Coalition membership is cancelled or the Coalition terminates instream hardness sampling at the approved
station,the permittee will immediately notify the Division and resume sampling for instream hardness
upstream of its discharge.
8. Chronic Toxicity (Ceriodaphnia) P/F at 90% in January, April, July, and October [see A. (3.)].
TOXICITY MONITORING SHALL COINCIDE WITH METALS MONITORING.
9. The permittee shall perform three Effluent Pollutant Scans during the term of this permit[see A.(4.)].
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 14

Permit NC0024228
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (10 MGD)
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.]
Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302]
Beginning upon receipt of an Authorization to Operate at 10 MGD and lasting until permit expiration,the
Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored'by the
Permittee as specified below 1':
EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Flow 50050 10 MGD Continuous Recording I or E
BOD,5-day,20°C 3
(April 1—October 31) C0310 4.0 mg/L 6.0 mg/L Daily Composite I&E
BOD,5-day,20°C 3 C0310 8.0 mg/L 12.0 mg;L Daily Composite I & E
(November 1—March 31)
Total Ssuspended Solids C0530 30.0 mg/L 45.0 mg/L Daily Composite I &. E
(TSS)NH3 as N
(April 1 -October 31) CO610 1.0 mg/L 3.0 mg/L Daily Composite E
NH3 as N
(November 1 -March 31) C0610 1.8 mg/L 5.4 mg/L Daily Composite E
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Dissolved Oxygen(DO) 00300 Daily average>7.0 mg/L Daily Grab E
Fecal Coliform 200/100 400/100
31616 Daily Grab E
(geometric mean) mL mL
Total
(TRC)a Residual Chlorine 50060 18 µg/L Daily Grab E
Temperature(°C) 00010 Monitor and Report Daily Grab E
Total Nitrogen 5 QM600 159,8701b/year Weekly Composite E
(TKN+NO2-N+NO3-N) (annual load)
Total Phosphorus 5 QM665 13,341 lb/year Weekly Composite E
(annual load)
Total Copper(µg/L) 01042 Monitor and Report Monthly Composite E
Total Zinc(µg/L) 01092 Monitor and Report Quarterly Composite E
Total Recoverable 32730 Monitor and Report Quarterly Composite E
Phenolics(µg/L)
Total Hardness[as CaCO3] 00900 Monitor and Report Quarterly Composite E
(mom)6
Total Hardness[as CaCO3] 00900 Monitor and Report Quarterly Grab U
(mg/L)7
Chronic Toxicity 8 TGP3B Monitor and Report Quarterly Composite E
Effluent Pollutant Scan NC01 Monitor and Report Footnote 9 Footnote 9 E
Page 5 of 14

Permit NC0024228
EFFLUENT CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Fecal Coliform 31616 Monitor and Report Footnote 2 Grab U,D1,D2
(geometric mean)
Dissolved Oxygen(mg/L) 00300 Monitor and Report Footnote 2 Grab U,D1,D2
Temperature(°C) 00010 Monitor and Report Footnote 2 Grab U,Dl,D2
Conductivity(µmhos/cm) 00094 Monitor and Report Footnote 2 Grab U,D1,D2
Total Phosphorus(mg/L) C0665 Monitor and Report June—Sept. Grab U,Dl,D2
1/month
Total Nitrogen(mg/L) C0600 Monitor and Report June—Sept. Grab U,D1,D2
1/month
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system[see A. (7.)].
2. Sample locations:I-Influent,E-Effluent,U—Upstream at Rich Fork Creek at NCSR1757-Chestnut Street
above the outfall,D1 -Downstream at NCSR 1792, D2- Downstream at NCSR 2123 upstream of Abbotts
Creek. Except for instream total phosphorus and total nitrogen, other instream samples shall be collected
3/Week during the months of June, July, August, and September and Weekly during the remainder of the
year. Instream monitoring for fecal coliform, dissolved oxygen, temperature, conductivity, total
phosphorus and total nitrogen are provisionally waived in light of the permittee's participation in the
Yadkin-Pee Dee River Basin Association (provided the sampling frequency monthly or greater).
Instream monitoring will be immediately reinstated and the Division shall be notified immediately
should the permittee end its participation in the Association.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15%of the
respective influent value(85%removal).
4. Limit and monitoring apply only if chlorine or chlorine derivatives are used for disinfection.The Division
shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit.
However,the Permittee shall record and submit all values reported by a North Carolina certified laboratory
(including field certified),even if these values fall below 50 µg/L.
5. See A. (5.)CALCULATION AND REPORTING OF NUTRIENT LOADS for details.
6. Effluent Total Hardness sampling shall be conducted in conjunction with effluent metals for the
pretreatment program(cadmium,copper,lead,nickel,silver,and zinc).
7. The permittee shall sample instream hardness upstream of the facility's discharge.The sample shall be
representative of the hardness in the receiving stream.If the permittee is a member of a monitoring
coalition program,sampling for instream hardness may be waived as long as the monitoring coalition
agrees to sample hardness at the nearest upstream location,at a minimum frequency of quarterly,and the
permittee has obtained approval from DWR-NPDES Permitting Unit that the upstream station being
monitored by the Coalition is representative of the receiving stream for this discharge.The permittee is
responsible for submitting instream hardness test results with its permit renewal application package.If
Coalition membership is cancelled or the Coalition terminates instream hardness sampling at the approved
station,the permittee will immediately notify the Division and resume sampling for instream hardness
upstream of its discharge.
8. Chronic Toxicity (Ceriodaphnia) P/F at 90% in January, April, July, and October [see A. (3.)].
TOXICITY MONITORING SHALL COINCIDE WITH METALS MONITORING.
Footnotes continue on next pace
Page 6 of 14

Permit NC0024228
Footnotes(continued):
9. The permittee shall perform three Effluent Pollutant Scans during the term of this permit[see A.(4.)].
10. Special conditions regarding identifying potential causes of significant changes to water quality
conditions and hydromorphology(i.e.,from debris dams).On an Annual basis:
a) i.Review instream water quality data to identify any trends in reduction in DO concentration that
could be indicative of changes to channel hydraulics that could threaten assimilative capacity.
ii.If water quality data suggest potentially reduced assimilative capacity(DO concentrations below
the WQS at any of the sampling sites along Rich Fork Creek), the City will conduct additional
investigation as to potential causes that could be contributing to degraded stream water quality
conditions within sixty(60) days. Findings of such investigations shall be communicated to the
DWR regional office and NPDES Municipal Permitting Unit for further review.
b) i. The permittee shall perform reconnaissance activities to identify potential treefall debris dams
which may be causing changes to stream hydraulics which are negatively impacting the
assimilative capacity of Rich Fork Creek. Reconnaissance activities might include reviewing
readily available streaming aerial imagery and brief field investigations at key locations subject to
debris obstruction.Where access may not be feasible or practical,the City may choose to conduct
fly-over investigations of Rich Fork Creek in lieu of manual field inspection.
ii. If excessive treefall is identified, the findings of such investigations shall be communicated to
the DWR regional office and NPDES Municipal Permitting Unit for further review within sixty
(60)days.
iii. Based on the findings above, this permit could be revised if the conditions noted cause
significant changes to water quality conditions or hydromorphology.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 7 of 14

Permit NC0024228
A. (3.) CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY) [15A NCAC 02B.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 90%at both 8.2 MGD and 10 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 January,April,July,and October.
These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent
sampling for this testing must be obtained during representative effluent discharge and shall be performed at the
NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit,then multiple-concentration testing shall be performed at a minimum,in each of the two
following months as described in"North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure"(Revised-December 2010,or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form(MR-1)for the months in which tests were performed,using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally,DWR Form AT-3(original)is to be sent to the
following address:
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.ATB(i1ncdenr.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.
Page 8 of 14

Permit NC0024228
A. (4.) EFFLUENT POLLUTANT SCAN
[G.S. 143-215.1(b)]
The Permittee shall perform a total of three(3)Effluent Pollutant Scans for all parameters listed below. One scan must
be performed in each of the following years:2022,2023 and 2024. 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
a
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 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 1
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
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Permit NC0024228
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 St of each designated sampling year. 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 DE /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
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: ATForms.ATB(a ncdenr.gov.
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.) CALCULATION AND REPORTING OF NUTRIENT LOADS (monthly& annual)
[G.S. 143-215.1(b)]
The Permittee shall calculate and report monthly and annual nutrient loads for the Westside WWTP as follows:
a) Calculation of Discharge Loads: The Permittee shall calculate monthly and annual discharge loads as
follows:
(i.) Monthly Discharge Load(lb/mo,TN or TP)= 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)
8.34 = conversion factor,from(mg/L x MG)to pounds
(ii.) Annual Discharge Load(lb/yr,TN or TP)=Sum of the 12 Monthly TN(or TP)Loads for the calendar
year
b) Reporting of Nutrient Discharges: The Permittee shall report each facility's monthly TN and TP discharge
loads in that facility's discharge monitoring report.The monthly reporting parameter codes for TN and TP
are QM600 and QM665,respectively.
Page 10 of 14

Permit NC0024228
c) The Permittee shall report each calendar year's loads with the December report for that year and shall append
the report with a summary of monthly loads and calculations.The annual reporting parameter codes for TN
and TP are QY600 and QY665,respectively.
A.(6.) MERCURY MINIMIZATION PLAN
[G.S. 143-215.1(b)]
The Permittee shall maintain and implement a Mercury Minimization Plan(MMP)during this permit term. The
MMP shall be available for inspection on-site. 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. (7.) 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.)(a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge
Monitoring Report(eDMR)intemet 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 interne. 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 address:
NC DEQ/Division of Water Resources/Water Quality Permitting Section
ATTENTION: Central Files
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Permit NC0024228
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.
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
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-rul e
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:
Page 12 of 14

Permit NC0024228
http://deq.nc.gov/about/divisions/water-resources/edmr
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 certifi,, 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 offines and imprisonment for knowing violations."
5. Records Retention[Supplements Section D.(6.)1
The permittee shall retain records of all Discharge Monitoring Reports,including eDMR submissions. These
records or copies shall be maintained for a period of at least 3 years from the date of the report. This period
may be extended by request of the Director at any time[40 CFR 122.41].
Page 13 of 14

Permit NC0024228
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Location
USGS Quad Name:D18NE Lat.:35'56'14"
Receiving Stream:Rich Fork Creek Long.:80'O6'42"
Stream Class:C Basin:Yadkin
Subbasin:03-07-07 HUC: 03040103 North Davidson County
Page 14of14