HomeMy WebLinkAboutNC0065714_Draft Permit_20230525 ROY COOPER
Governor
ELIZABETH BISER
Secretary •Q asivs•
RICHARD E. ROGERS, JR
Director NORTH CAROLINA
Environmental Quality
May 30, 2023
Amanda Berger, Director of Environmental Compliance
AQUA North Carolina, Inc. (AQUA)
202 MacKenan Court
Cary,North Carolina 27511
Subject: Review of Draft NPDES Permit NC0065714
AQUA NC—Tradewinds Subdivision WWTP
WPCS Grade WW- II
NCSR 2227, South of Wake Crossroads
Wake County
Ms. Berger:
In response to your request to renew the subject NPDES permit, received September 12,2022,
the Division of Water Resources (DWR or the Division)hereby transmits this draft permit for
your review and comment. Please review this document carefully to assure your understanding
of the permit limits and monitoring conditions, and to correct errors, if any.
Concurrent with this notification, the Division will solicit public comment on this draft by
publishing a notice in newspapers having circulation in the general Wake County area, as
required by the NPDES Program. Please provide your written comments, if any, to me via email
[joe.corporon@deq.nc.gov], or write to my attention care of NCDEQ/DWR/NPDES Program
no later than July 3,2023, approximately 30 days after receiving this letter. Your written
comments are welcome,but they are not mandatory.
The Division notes that, since last renewal, AQUA has made no significant alterations to the
Tradewinds Subdivision WWTP treatment system. Therefore, DWR has made only minimal
updates to permit map and text [see A. (7.)] for renewal. For your convenience, we have also
resorted the permit effluent monitoring table by Monitoring Requirements [see A. (1.)].
The NPDES standard conditions (Parts II, III, and IV), are part of this permit but are not included
in this draft document(cover,map, and Part I). The latest version of Parts II, III, and IV are
available at https://bit.ly/2BZ4xxx and can be viewed online or downloaded as a PDF file.
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699-1617—919.707.3616
Amanda Berger,Director of Environmental Cor.
AQUA North Carolina, Inc.
Permit Renewal -Draft Review
June2023
Following the mandatory 45-day public-comment period, the Division will review all pertinent
comments, if any, and take appropriate action prior to issuing an NPDES permit final. If you
have questions concerning this draft,please e-mail the undersigned [joe.corporon@deq.nc.gov].
Respectfully,
Joe R.Corporo , P.G.
NCDEQ /DW./NPDES Permitting
Enclosure: NPDES Permit NC0065714 (renewal DRAFT)
hc: NPDES Program Files [Laserfiche]
ec: RRO,Vanessa Manuel.
OCU,Maureen Kinney
Permit NC0065714
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
[NPDES]
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,
AQUA North Carolina, Inc.
is hereby authorized to discharge wastewater from a facility located at the
Tradewinds Subdivision WWTP
south of Wake Crossroads, off NCSR 2227
Wake County
to receiving waters designated as an unnamed tributary to Lower Barton 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.
This permit shall become effective , 2023.
This permit and authorization to discharge shall expire at midnight on February 28, 2028.
Signed this day , 2023.
for Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 10
Permit NC0063614
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge, are hereby
revoked. The exclusive authority to operate this facility arises under this permit. The authority to
operate the facility under previously issued permits bearing this number is no longer effective. The
conditions, requirements, terms, and provisions of this permit authorizing discharge under the NPDES
govern discharges from this facility.
AQUA North Carolina, Inc.
is hereby authorized to:
1. continue to operate an 0.100 MGD extended aeration package WWTP including:
• bar screen
• aeration basin
• clarifier
• chemical phosphorus removal
• tertiary filters
• flow meter
• ultraviolet disinfectant
• effluent pumps
• back-up power generator
these facilities located at Wildwood Green Subdivision Wastewater Treatment Plant, on Gleneagles
Drive, northwest of Raleigh, Wake County, and
2. discharge from said treatment works at the location specified on the attached map into an unnamed
tributary to Lower Barton Creek, currently classified WS-IV;NSW waters within hydrological
Unit 03-04-01 [HUC: 030202010602] of the Neuse River Basin.
Page 2 of 10
Permit NC0063614
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee
is authorized to discharge from outfall number 001. Such discharges shall be limited, monitored, and
reported' by the Permittee as specified below:
EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Sample
PARAMETER CODE Average Maximum Frequency Type Location 2
Flow(MGD) 50050 0.050 Continuous Recorder Influent or
Effluent
Temperature(°C) 00010 Daily(5/Week) Grab Effluent
BOD,5-Day(20 Deg.C) C0310 11.0 mg/L 16.5 mg/L Weekly Composite Effluent
(April 1 -October 31)
BOD,5-Day(20 Deg.C)
C0310 22.0 mg/L 33.0 mg/L Weekly Composite Effluent
(November 1 -March 31)
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L Weekly Composite Effluent
NH3 as N(Aprl-Oct31 summer) C0610 12.0 mg/L Weekly Composite Effluent
NH3 as N(Novl-Mar31 winter) C0610 Monitor and Report Weekly Composite Effluent
Fecal Coliform 31616 200/ 100 mL 400/ 100 rnL Weekly Grab Effluent
(geometric mean)
Total Residual Chlorine(TRC)3 50060 24 µg/L Weekly Grab Effluent
Temperature(°C) 00010 Weekly Grab U&D
Dissolved Oxygen(mg/L) 00300 Weekly Grab U&D
Dissolved Oxygen 00300 Daily Average>5.0 mg/L Weekly Grab Effluent
pH standard units 00400 >6.0 and<9.0 Weekly Grab Effluent
Total Kjeldahl Nitrogen C0625 Monitor&Report,mg/L 2/Month Composite Effluent
Nitrite/Nitrate(NO2-N+NO3-N) C0630 Monitor&Report,mg/L 2/Month Composite Effluent
Total Nitrogen(TN)4 C0600 Monitor&Report 2/Month Composite Effluent
Total Phosphorus(TP) C0665 Monitor&Report 2/Month Composite Effluent
Total Monthly Flow(MG) 82220 Monitor&Report Monthly Calculated Effluent
Monitor&Report,
QM600 pounds/month Monthly Calculated Effluent
TN Load'5
QY600 Monitor&Report, Annually Calculated Effluent
pounds/year
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using the Division's
eDMR system [see A. (7)].
2. U: at least 100 feet upstream from the outfall. D: downstream at NCSR 1831.
Page 3 of 10
Permit NC0063614
3. TRC limit and monitoring requirements apply only if chlorine is used in the treatment process.
[See A.(4.)for instructions should the facility's permitted UV disinfection system fail and an
alternate means of disinfection is required.]
4. For a given wastewater sample, TN=TKN+NO2-N+NO3-N,where TN is Total Nitrogen,TKN
is Total Kjeldahl Nitrogen,and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen,respectively.
5. TN Load is the mass quantity of Total Nitrogen discharged in a given period of time [see A. (2)
for details].
Condition: The Permittee shall no floating solids or foam visible in other than trace amounts.
A. (2.) CALCULATION OF TOTAL NITROGEN LOADS
[G.S. 143-215.1(b)]
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 = average Total Nitrogen concentration(mg/L)of the composite samples
collected during the month
TMF = Total Monthly Flow of wastewater discharged during the month
(MG/month)
= conversion factor, fro (mg/L x MG) to pounds
ii. Annual TN Load (pounds/year)=Sun of the 12 Monthly TN Loads for the calendar year
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. (3.) 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 apply on a calendar year basis.
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 discharge is less than or equal to its TN Load limit, or
ii. the Penmittee is a co-permittee member of a TN compliance association.
c. If the Permittee is not a co-permittee member of a TN 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.
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.
Page 4 of 10
Permit NC0063614
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:
NCDEQ/DWR/NPDES
Attn: Neuse River Basin Coordinator
1617 Mail Service Center
Raleigh,NC 27699-1617
e. If the Permittee is a member and co-permittee of an approved TN 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.
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. (4.) TOTAL NITROGEN ALLOCATIONS
[G.S. 143-215.1(b)]
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 .0234)and
the status of each as of permit issuance. For compliance purposes,this table does not 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-Penmittee Member.
TN ALLOCATION
ALLOCATION SOURCE DATE STATUS
TYPE Estuary Discharge
(pounds/year) (pounds/year)
Assigned by Rule 12/7/199
Base (T15A NCAC 7, 202 2,022 Active
02B .0234) 4/1/2003
TOTAL 202 2,022
Footnote: Transport Factor= 10%
Page 5of10
Permit NC0063614
b. 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.
A. (5.) CHRONIC TOXICITY PERMIT LIMIT (Quarterly)
[15A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 72%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the "North Carolina ('eriodaphnia 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 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:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
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.
Page 6 of 10
Permit NC0063614
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. (6.) TEMPORARY MEANS OF DISINFECTION
[NCGS 143-215.1(a)]
a. In the event that the wastewater treatment plant's ultraviolet(UV)disinfection system should fail,
underperform, or otherwise be removed from effective service,the permittee or his agent should
immediately inform the Surface Water Protection Section staff of the Raleigh Regional Office of this
development and discuss temporary,alternate means for disinfection of the effluent.
b. If chlorine compounds are used as temporary means of disinfection,the total residual chlorine(TRC)
concentration of the effluent must be monitored daily while this method of disinfection is in use and TRC
values must be reported on the discharge monitoring report. TRC in the effluent may not exceed the permit
limit;therefore,dechlorination methods may also be necessary to ensure protection of water quality in the
receiving stream.
c. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the
permit. However,the Pennittee 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.
d. Use of a disinfection system other than the permitted UV system during circumstances not deemed as
emergency and/or temporary(replacement of lamps, lamp cleaning or maintenance, etc.)will be considered
a violation of the terms of this permit.
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.
Page 7of10
Permit NC0063614
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) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. The eDMR system may be
accessed at: https://deq.nc.gov/about/divisions/water-resources/edmr.
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility
being physically located in an area where less than 10 percent of the households have broadband
access, then a temporary waiver from the NPDES electronic reporting requirements may be granted
and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or
alternative forms approved by the Director. Duplicate signed copies shall be submitted to the
following address:
NC DEQ/Division of Water Resources/Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
See"How to Request a Waiver from Electronic Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the month following
the issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
Starting on December 21, 2020, 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.
Page 8 of 10
Permit NC0063614
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/about/divisions/water-resources/edmr
4. Signatory Requirements ISupplements Section B. (11.) (b) and Supersedes Section B. (11.)
LIU
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:
Page 9 of 10
Permit NC0063614
"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. (6.11. 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 10 of 10
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AQUA North Carolina, Inc.
Tradewinds Subdivision WWTP Facility -
Receiving Stream: Harris Creek(Wake Crossroads Lake) Location
State Grid/USGS Ouad: D24NE/Raleigh E. (not to Scale)
Hydrological Unit: 03-04-02
Drainage Basin: Neuse River
Stream Class: C;NSW
Latitude: 35°52'22"
Longitude: 78°30'22" NPDES Permit NC0065714
HUC: 030202010703 North
Wake County