NC0064050_Draft Permit_20220125

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ROY COOPER i ° ]°'
Governor 41s ,t�l�i
ELIZABETH S.BISER ra�SS
Secretary
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
January 25, 2022
Town of Apex
Attn: Mr. John Cratch,WRF Manager
PO Box 250
Apex,North Carolina 27502
Subject: Draft NPDES Permit Renewal
Permit NC0064050
Apex WRF
Wake County
Grade IV(3.6 MGD)
SIC Code 4952
Dear Permittee:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for the Apex Water
Reclamation Facility (Facility). Please review this draft carefully to ensure a thorough
understanding of the requirements and conditions it contains. There are a few changes from the
existing permit, including the following:
The following changes were made to the final permit sent to you on October 27,2021:
• The permit has been modified in response to the December 10, 2021, Town of Apex's
Request for Monitoring Reduction.The Facility meets the approval criteria for monitoring
reduction for BOD, TSS, Ammonia, and Fecal Coliform; therefore, the sampling
frequency for these parameters has been updated from daily to twice per week. The
Effluent Limitations and Monitoring Requirements table of the permit were updated in
Section A. (1.).
The final permit maintains the following significant changes identified in the letter sent on
October 27,2021: 1
• Per comments received from the permittee,the Components List on the Supplement to
Permit Cover Sheet has been updated to remove chlorine disinfection backup.
• As the facility discharges to a receiving stream with a zero 7Q10 flow, upstream hardness
monitoring is not required and was added to the draft permit in error. This monitoring
requirement has been removed from the permit [See A. (2.)].
• 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. (8.)].
• The expiration date was modified to more closely fit a 5-year permit cycle. Accordingly,
the specified years for the Effluent Pollutant Scans have been modified(2023, 2024,
2025). See Special Condition A. (7.).
DENorth Carolina Department of Environmental Quality I Division of Water Resources
Q 512 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699-1617
NORTH CAROUNA
o..rberat r rwr.....+o.Rro 919.707.9000

• During a Raleigh Regional Office site visit on November 27,2018,it was noted that the
description of the existing treatment units did not include the following: influent flow
meter,backup influent pump station,backup manual bar screen, scum pump station,RAS
pump stations,plant drain pump station,MLSS recycle pump station, drum sludge
thickener, sludge loading/decant pump stations,truck loading pad. The Component List
on the Supplement to Cover Sheet has been updated accordingly.
• Based on the reasonable potential analysis(RPA)showing no reasonable potential to
violate state water quality standards,the monitoring requirement for zinc has been
removed from the permit[See A. (1.)].
• Based on the reasonable potential analysis(RPA)predicting a maximum effluent copper
concentration that is greater than half of the allowable discharge concentration based on
state water quality standards, quarterly monitoring for copper has been maintained in the
permit.Additionally,based on the RPA predicting a maximum effluent cadmium
concentration greater than the allowable discharge concentration based on state water
quality standards,with only one detected value less than the allowable concentration,
quarterly monitoring for cadmium has been added to the permit[See A.(1.)].
• The Division is implementing dissolved metals standards in all permits,per the 2016
revisions to State water quality standards. As such,the NPDES Permitting Unit will need
site-specific effluent hardness data for each facility monitoring these metals in order to
calculate permit limitations. Effluent hardness has been added to the permit at a
monitoring frequency of quarterly[See A.(1.)].
• The Town of Apex reported Total Silver at less than detection,with detection level<5.0
and< 1.0 µg/L in the Effluent Pollutant Scans(or their DMR results). The Town's
allowable discharge concentration is 0.06 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 Town must continue to use sufficiently sensitive
test methods for all pollutants,including when performing Effluent Pollutant Scans.
• Based on Mercury TMDL evaluation showing mercury values reported at levels> 1 ng/L
and since the permitted flow is greater than 2 MGD, Special Condition A. (9.)Mercury
Minimization Plan has been continued in the permit. The permittee shall continue to
sample for mercury using EPA Method 1631E in the 3 Effluent Pollutant Scans [See A.
(6.)].
• Some of the wording has changed in Special Condition A. (3.), 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. 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 continued.
• 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. (8.)].
Page 2 of 3

• Parameter codes have been added to the Effluent Limitations and Monitoring
Requirements [See A. (1.)].
• 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 Wake 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 contact me at(919) 707-9130 or by email at [e-mail].
Sincerely,
Z6ClyttL
Diana Yit a� g
Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Central Files
Ecopy: US EPA Region 4
DWR/Raleigh Regional Office/Water Quality
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Aquatic Toxicology Branch/Cindy Moore and Zach Thomas
DWR/Municipal Unit-Pretreatment
Apex WRF/Pretreatment Coordinator/David Hardin
Apex WRF/Laboratory Supervisor/Lori Avent
LNBA/Haywood Phthisic
Page 3 of 3

Permit NC0064050
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
DRAFT PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,the
Town of Apex
is hereby authorized to discharge wastewater from a facility located at the
Apex Water Reclamation Facility
300 Pristine Waters Drive,Apex
Wake County
to receiving waters designated as an unnamed tributary to Middle Creek in the Neuse River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I,II, III,and IV hereof.
The permit shall become effective Month DD, 2022.
This permit and the authorization to discharge shall expire at midnight on April 30,2026.
Signed this day Month DD,2022.
DRAFT
for S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0064050
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility,whether for operation or discharge are hereby revoked.
As of this permit issuance, any previously issued permit bearing this number is no longer effective.
Therefore, the exclusive authority to operate and discharge from this facility arises under the permit
conditions,requirements,terms,and provisions included herein.
The Town of Apex is hereby authorized to:
1. Continue to operate an existing 3.6 MGD wastewater treatment facility that includes the
following components:
• Influent pump station
• Backup influent pump station
• Influent flow meter
• Two mechanical bar screens
• Manual bar screen
• Grit screw conveyor/classifier and screw compactor
• Three oxidation ditches
• Four secondary clarifiers
• Scum pump station
• RAS pump stations
• Plant drain pump station
• MLSO recycle pump station
• Tertiary filtration
• Ultraviolet disinfection
• Cascade aeration
• Three aerobic sludge digesters
• Drum sludge thickener
• Sludge loading/decant pump stations
• Truck loading pad
• Parshall flume
• Standby power
This facility is located southeast of Apex at the Apex Water Reclamation Facility at 300
Pristine Waters Drive, Apex,Wake County.
2. Discharge from said treatment works at the location specified on the attached map into an
unnamed tributary to Middle Creek,currently a class C-NSW water in the Neuse River Basin.
Page 2 of 14

Permit NC0064050
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq.,02B .0500 et seq.] Grade IV Biological Water Pollution Control System
[15A NCAC 08G.0302]
During the period beginning on the effective date of this permit and lasting until permit expiration,
the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges
shall be limited and monitored' by the Permittee as specified below:
PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Flow 50050 3.6 MGD Continuous RecordingInfluent or
Effluent
Total Monthly Flow(MG) 82220 Monitor and Report Monthly Recorded or Influent or
Calculated Effluent
BOD,5-day,20°C 13 Influent and
(April 1—October 31)3 C0310 5.0 mg/L 7.5 mg/L 2/Week Composite Effluent
BOD.5 day,20°C 3 C0310 10.0 mg/L 15.0 mg/L 2/Week 13 Composite Influent and
(November 1 —March 31) Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/Week 13 Composite Influent and
(TSS) Effluent
Ammonia(NH3 as N) C0610 1.0 mg/L 3.0 mg/L 2/Week 13 Composite Effluent
(April 1 -October 31)
Ammonia(NH3 as N) C0610 2.0 mg/L 6.0 mg/L 2/Week 13 Composite Effluent
(November 1 -March 31)
Dissolved Oxygen(mg/L) 00300 Daily Average>_5.0 mg/L Daily Grab Effluent
Fecal Coliform 31616 200/100 mL 400/100 mL 2/Week 13 Grab Effluent
(geometric mean)
Total
(TRC)Residual Chlorine 50060 17 pg/L Daily Grab Effluent
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
TKN(mg/L)5 00625 Monitor and Report Weekly Composite Effluent
NO3-N+NO2-N(mg/L)5 00630 Monitor and Report Weekly Composite Effluent
TN(mg/L)5 C0600 Monitor and Report Weekly Composite Effluent
QM600 Monitor and Report(pounds/month) Monthly Calculated Effluent
TN Load 6
QY600 40,547 pounds/year(annual mass loading) Annually Calculated Effluent
Total Phosphorus C0665 2.0 mg/L(Quarterly Average)8 Weekly Composite Effluent
pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent
Total Copper 9 01042 Monitor and Report Quarterly Composite Effluent
Total Cadmium 9 01027 Monitor and Report Quarterly Composite Effluent
Chronic Toxicity 10 TGP3B Monitor and Report Quarterly Composite Effluent
Effluent Pollutant Scan NC01 Monitor and Report See Footnote 11 Effluent
Total Hardness[as 00900 Monitor and Report QuarterlyComp osite Effluent
CaCO3](mg/L)12 P P
Page 3 of 14

Permit NC0064050
(Continued from A.(1.)EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS)
Footnotes:
1 Submit discharge monitoring reports electronically using the NC DWR's eDMR application system.
See section A.(8.).
2 See A.(2.)for instream monitoring requirements.
3 The monthly average effluent BOD5 and total suspended solids concentrations shall not exceed 15%
of their respective influent value(85%removal).
4 Total Residual Chlorine compliance is required if chlorine or chlorine derivative is used for
disinfection.The Division shall consider all effluent TRC 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/1.
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+NO2-N are nitrate and nitrite nitrogen,respectively.
6 TN Load is the mass quantity of Total Nitrogen discharged in a given period of time. See A.(4.),
Calculation of TN Loads.
7 Compliance with this limit shall be determined in accordance with A. (5.)of this permit,Annual
Limits for Total Nitrogen.
8 The quarterly average for total phosphorus shall be the average of composite samples collected
weekly during each calendar quarter(January-March,April-June,July-September,October-
December).
9 Sampling for copper and cadmium shall coincide with chronic toxicity testing.
10 Chronic Toxicity(Ceriodaphnia)@ 90%,February,May,August,November; see A.(3).
11 The permittee shall perform three Effluent Pollutant Scans during the term of this permit[see A.(6.)].
12 Effluent Total Hardness sampling shall be performed in conjunction with testing for hardness-
dependent metals(cadmium,copper,lead,nickel,silver,and zinc).
13 It must occur on an two non-consecutive days during the calendar week.
THERE SHALL • I ISCHAR • IDS OR I:LE FOAM IN OTHER THAN TRACE AMOUNTS.
Page4of14

Permit NC0064050
A.(2.) INSTREAM MONITORING REQUIREMENTS [15A NCAC 02B .0500]
Instream monitoring is required for the following parameters at the locations specified:
Parameter Sample Type Collection Time Frequency Location'
Dissolved Oxygen Grab Summer and Winter See Notes 1,2 Upstream,Di,D2, D3
Temperature Grab Summer and Winter See Notes 1,2 Upstream, D, D2, D3
pH Grab Summer and Winter See Notes 1,2 Upstream,Di,D2,D3
Total Phosphorus Grab Summer 2/Month2 Upstream,Di,D2,D3
TKN Grab Summer 2/Month2 Upstream,Di,D2, D3
NH3 as N Grab Summer 2/Month2 Upstream,Di,D2,D3
Total Nitrogen Grab Summer 2/Month2 Upstream,Di,D2, D3
PO4 Grab Summer 2/Month2 Upstream,Di,D2,D3
Chlorophyll-a Grab Summer 2/Month2 Upstream,Di,D2, D3
Footnotes:
i Upstream:above the outfall. Di:Downstream at NCSR 1301;D2:Downstream at NCSR 1152;D3:
Downstream in Sunset Lake(dam's walkway)at Sunset Lake Lodge. Stream samples for dissolved
oxygen,pH, and temperature shall be collected three times per week during the months of June,
July,August,and September and weekly during the remainder of the year.
2 As a participant in the Lower Neuse Basin Association, Inc. (LNBA), the subject facility is not
responsible for conducting the instream monitoring requirements summarized above. Should your
membership in the Association be terminated, the Division shall be immediately notified and all
instream monitoring requirements will be immediately reinstated.
Page 5 of 14

Permit NC0064050
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%.
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. 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 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,NC 27699-1621
Or,results can be sent to the email: ATForms.ATBAncdenr.gov.
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later
than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete,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.
Page g

Permit NC0064050
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.
A.(4.) CALCULATION OF TOTAL NITROGEN LOADS [G.S. 143-215.1(b)]
a. The Permittee shall calculate monthly and annual TN Loads as follows:
i. Monthly TN Load(pounds/month)=TN x TMF x 8.34
where: TN = the average Total Nitrogen concentration(mg/L)of the composite samples
collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the month
(MG/month)
8.34 = conversion factor,from(mg/L z MG)to pounds
ii. Annual TN Load(lb./yr.)=Sum of the 12 Monthly TN Loads for the calendar year
b. The Permittee shall report monthly Total Nitrogen results(mg/L and pounds/month)in the
discharge monitoring report for that month and shall report each year's annual results
(pounds/year)in the December report for that year.
A. (5.)ANNUAL LIMITS FOR TOTAL NITROGEN [G.S. 143-215.1(b)]
a. Total Nitrogen(TN)allocations and TN Load limits for NPDES dischargers in the Neuse River
basin are annual limits and are applied for the calendar year.
b. For any given calendar year,the Permittee shall be in compliance with the annual TN Load limit in
this Permit if:
i. the Permittee's annual TN Load is less than or equal to said limit,or
ii. the Permittee is a Co-Permittee Member of a compliance association.
c. If the Permittee is not a co-permittee member of a compliance association and the Permittee's
cumulative annual TN discharge exceeds the effective TN Load limit in this permit at any point
during the calendar year,the Permittee is in violation of its TN Load limit,and each day of a
continuing violation shall constitute a separate violation.
Page 7 of 14

Permit NC0064050
d. The TN Load limit in this Permit(if any)may be modified as the result of allowable changes in the
Permittee's TN allocation.
i. Allowable changes include those resulting from purchase of TN allocation from the Wetlands
Restoration Fund;purchase,sale,trade,or lease of allocation between the Permittee and other
dischargers;regionalization;and other transactions approved by the Division.
ii. The Permittee may request a modification of the TN Load limit in this Permit to reflect
allowable changes in its TN allocation.Upon receipt of timely and proper application,the
Division will modify the permit as appropriate and in accordance with state and federal
program requirements.
iii. Changes in TN limits become effective on January 1 of the year following permit
modification. The Division must receive application no later than August 31 for changes
proposed for the following calendar year.
iv. Application shall be sent to:
NCDWR/NPDES Programs
Attn:Neuse River Basin Coordinator
Mail Service Center
Raleigh,NC 27699-1617
e. If the Permittee is a member and co-Permittee of an approved compliance association,its TN
discharge during that year is governed by that association's group NPDES permit and the TN limits
therein.
i. The Permittee shall be considered a Co-Permittee Member for any given calendar year in
which it is identified as such in Appendix A of the association's group NPDES permit.
ii. Association roster(s)and members'TN allocations will be updated annually and in accordance
with state and federal program requirements.
iii. If the Permittee intends to join or leave a compliance association,the Division must be
notified of the proposed action in accordance with the procedures defined in the association's
NPDES permit.
A. Upon receipt of timely and proper notification,the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
B. Membership changes in a compliance association become effective on January 1 of the
year following modification of the association's permit.
f. The TN monitoring and reporting requirements in this Permit remain in effect until expiration of
this Permit and are not affected by the Permittee's membership in a compliance association.
A.(6.)EFFLUENT POLLUTANT SCAN(Municipal POTWs) [G.S. 143-215.1(b)]
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed
below. One scan must be performed in each of the following years: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."
Page 8 of 14

Permit NC0064050
Ammonia(as N) CO610 Trans-1,2- 34546 Bis(2-chloroethyl)ether 34273
dichloroethylene
Chlorine(total residual, 50060 1,1-dichloroethylene 34501 Bis(2-chloroisopropyl) 34283
TRC) ether
Dissolved oxygen 00300 1,2-dichloropropane CO541 Bis(2-ethylhexyl) CO100
phthalate
Nitrate/Nitrite 00630 1,3-dichloropropylene 77163 4-bromophenyl phenyl 34636
ether
Kjeldahl nitrogen 00625 Ethylbenzene 34371 Butyl benzyl phthalate 34292
Oil and grease 00556 Methyl bromide 34413 2-chloronaphthalene 34581
Phosphorus CO665 Methyl chloride 34418 4-chlorophenyl phenyl 34641
ether
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 CO034 Trichloroethylene 39180 1,4-dichlorobenzene 34571
Copper 01042 Vinyl chloride 39175 3,3-dichlorobenzidine 34631
Lead 01051 Acid-extractable Diethyl phthalate 34336
compounds:
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 CO626
Silver 01077 2,4-dimethylphenol 34606 1,2-diphenylhydrazine 34346
Thallium 01059 4,6-dinitro-o-cresol 34657 Fluoranthene CO376
Zinc 01092 2,4-dinitrophenol 34616 Fluorene 34381
Cyanide 00720 2-nitrophenol 34591 Hexachlorobenzene CO700
Total phenolic 32730 4-nitrophenol 34646 Hexachlorobutadiene CO702
compounds
Volatile organic Pentachlorophenol 39032 Hexachlorocyclo- 34386
compounds: pentadiene
Acrolein 34210 Phenol 34694 Hexachloroethane 34396
Acrylonitrile 34215 2,4,6-trichlorophenol 34621 Indeno(1,2,3-cd)pyrene 34403
Benzene 34030 Base-neutral Isophorone 34408
compounds:
Bromoform 32104 Acenaphthene 34205 Naphthalene 34696
Carbon tetrachloride 32102 Acenaphthylene 34200 Nitrobenzene 34447
Chlorobenzene 34301 Anthracene CO220 N-nitrosodi-n- 34428
propylamine
Chlorodibromomethane 34306 Benzidine 39120 N-nitrosodimethylamine 34438
Chloroethane 85811 Benzo(a)anthracene CO526 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) 34278
methane
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 318t 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:
Page 9 of 14

Permit NC0064050
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
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.ATBAncdenr.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. (7.) TOTAL NITROGEN ALLOCATIONS [15A NCAC 02B .0713]
a. The following table lists the Total Nitrogen(TN)allocation(s)assigned to,acquired by,or
transferred to the Permittee in accordance with the Neuse River nutrient management rule(T15A
NCAC 02B .0713)and the status of each as of permit issuance. These allocations and credits are not
enforceable limits nor do they supersede any TN limit(s)established elsewhere in this permit or in
the NPDES permit of a compliance association of which the permittee is a Co-permittee Member.
ALLOCATION ALLOCATION AMOUNT(1)
TYPE SOURCE DATE STATUS
Estuary(Iblyr) Discharge(Ib/yr)
Base Assigned by Rule 12/7/97; 20,274 40,547 Active
(15A NCAC 02B.0713) 4/1/03;
1/1/19
20,274 40,547 Active
Footnote:
1.Transport Factor=50%
Any addition,deletion,or modification of the listed allocation(s)(other than to correct typographical
errors)or any change to Active status of any of the listed allocations shall be considered a major
modification of this permit and shall be subject to the public review process afforded such modifications
under state and federal rules.
Page 10 of 14

Permit NC0064050
A. (8.) 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)l
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.
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;
• Pretreatment Program Annual Reports;and
• Clean Water Act(CWA) Section 316(b)Annual Reports.
Page 11 of 14

Permit NC0064050
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.
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/aboutldivisions/water-resources/edmr
4. Sianatory 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
Page 12 of 14

Permit NC0064050
eDMR system,registering for eDMR and obtaining an eDMR user account,please visit the following
web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification[40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION
WILL BE ACCEPTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted.Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the information,
the information submitted is, to the best of my knowledge and belief true, accurate, and complete. I
am aware that there are significant penalties for submitting false information, including the
possibility of fines and imprisonment for knowing violations."
5. Records Retention [Supplements Section D.(6.)1
The permittee shall retain records of all Discharge Monitoring Reports,including eDMR
submissions. These records or copies shall be maintained for a period of at least 3 years from
the date of the report. This period may be extended by request of the Director at any time [40
CFR 122.41].
A.(9.)MERCURY MINIMIZATION PLAN(MMP)[G.S. 143-215.1 (b)]
The permittee shall continue implementing the mercury minimization plan during this permit term. The
MMP 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.
Page 13 of 14

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NC0064050 - Apex WRF
,1
A Facility ._
Latitude: 3542'30' Sub-Basin: CS-04-C3 Location
LonEitude: 7850'03'
Quad#: Apex,E23NE
--fer
Stream Class: C NSW
Town of Apex
ReceiVng Strearn: L to Middle Creek
North NO3054050
Apex Weer Reclamation Facilitr
Fermitted Flow: 3.6 MGD