NC0049662_Draft Permit_20181212

ROY COOPER
G.ve
MICHAEL S. REGAN
Secmt w
LINDA CULPEPPER
D, r& r
NORTH CARO'LINA
Environmental Quality
December 12, 2018
Mr. Shannon V. Becker, President
Aqua North Carolina, Inc.
202 Mackenan Ct.
Cary, NC 27511
Subject: Draft NPDES Permit NCO049662
Hawthorne Subdivision WWTP
Grade II Biological WPCS
Wake County
Dear Mr. Becker:
The Division has reviewed your request to amend the subject permit. Please review this draft carefully
to ensure your thorough understanding of the information, conditions, and requirements it contains.
The draft permit includes the following significant changes from the existing permit:
1. Outfall map has been updated.
2. Facility grade has been added.
3. Receiving stream characteristics have been added on the Supplement to Permit Cover Sheet.
4. Total Nitrogen and Total Phosphorus limits and monitoring have been updated in Section A. (1).
5. Footnotes in Section A. (1) have been updated.
6. A new Section A. (2) has been added regarding combined limitations for nutrients.
7. Language has been updated in the renumbered Sections A. (3), A. (4), and A. (5).
With this notification, the Division will solicit public comment on this draft permit by publishing a
notice in newspapers having circulation in the general Wake County area, per EPA requirements. Please
provide your comments, if any, to me no later than 30 days after receiving 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 the draft, please
contact me at 919-707-3619, or via e-mail [[e-mail]].
Sincerely,
6�-
Brianna Young
Compliance and Ex ited Permitting Unit
North Carolina Department of Environmental Quality I Division of Water Resources
1617 Mail service Center I Raleigh, North Carolina 27699-1617
919-707-9000

cc: NPDES Files
Raleigh Regional Office
Wastewater Operator Certification Group
DWR/Public Water Supply

Permit NCO049662
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
Hawthorne Subdivision WWTP
Off Warwickshire Way
North of Leesville
Wake County
to receiving waters designated as Upper Barton Creek in the Neuse River Basin in accordance with
effluent limits, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective.
This permit and authorization to discharge shall expire at midnight on January 31, 2023.
Signed this day.
Linda Culpepper
Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 11

Permit NC0049662
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
govem discharges from this facility.
AQUA North Carolina, Inc.
is hereby authorized to:
1. Continue to operate an existing 0.250 MGD wastewater treatment system with the following
components:
• Influent pump station
• Influent equalization basin
• Flow equalization basin
• Dual 0.089 MGD extended aeration treatment plants
• Dual 0.036 MGD extended aeration treatment plants
• Chemical phosphorus removal via a ferric sulphate feed system
• Effluent equalization tank
• Ultraviolet disinfection
• Backup chlorine disinfection
• Post aeration
• 4 sludge holding tanks
• Standby power
• Flow meter
This facility is located north of Leesville at the Hawthorne Subdivision WWTP off Warwickshire
Way in Wake County.
2. Discharge from said treatment works at the location specified on the attached map into Upper Barton
Creek, waters currently classified WS-1 V; NSW [Stream Segment: 27-15-(1)] in sub -basin 03-04-01
[HUC: 0302020106] of the Neuse River Basin.
Page 2 of 11

Permit NCO049662
PART I.
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade II Biological WPCS [15A NCAC 08G .0302]
During the period beginning on the effective date of this permit and lasting until 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:
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
EFFLUENT CHARACTERISTICS
Monthly
Daily
Measurement
Sample Type
Sample
Parameter Code
Average
Maximum
Frequency
Location 2
Flow 50050
0.25 MGD-
Continuous
Recorder
Influent or
Effluent
Total Monthly Flow
82220
Monitor &Report
l�
Monthlyy
Recorded or
Effluent
(MG / Month)
�`
\Calculated
Temperature (°C) 00010
5/Week
��, Grub
Effluent
Temperature (°C) 00010
Weekly
Grab
U & D
Dissolved Oxygen 00300
Daily Average,> 5.0 mg/L
3/Week
Grab
Effluent
Dissolved Oxygen (mg/L) 00300
z
Weekly
Grab
U & D
pH 00400 ,
> 6.0 and <:9.0,standard units-
3/Week
Grab
Effluent
Fecal Coliform 31616
(geometric mean)
'`200,/ 100 mL °.
400 / 1,00 mL'�
. Weekly
Grab
Effluent
Total Residual Chlorine 3 '50060
`22`Ng/L
2/Week
Grab
Effluent
Total Suspended Solids C0630 .
30.0 mg/L
45.0. trig/L
Weekly
Composite
Effluent
BOD, 5-Day`(20 Deg. C) C0310
16.0 mg/L
`24,0' mg/L
Weekly
Composite
Effluent
(April 1- October 31)
BOD, 5-Day (20 Deg. C)
C0310
- 30.0 mg/L '
45.0 mg/L
Weekly
Composite
Effluent
(November 1- March 31)
NH3 as N
(April 1-October 31) C0610 ,
2.0 mg/L
10.0 mg/L
Weekly
Composite
Effluent
NH3 as N C0616
(November 1 - March 31)
4.0 mg/L
20.0 mg/L
Weekly
Composite
Effluent
Total Kjeldahl Nitrogen (mg/L) C0625
Monitor & Report
2/Month
Composite
Effluent
NO2-N + NO3-N (mg/L) C0630
Monitor & Report
2/Month
Composite
Effluent
Total Nitrogen (TN) 4 (mg/L) C0600
Monitor & Report
2/Month
Composite
Effluent
QM600
Monitor &Report
onitors Repo)
Monthly
Calculated
Effluent
TN Load 5,6
QY600
Monitor & Report
Annually
Calculated
Effluent
(pounds/year)
Page 3 of 11

Permit NC0049662
Total Phosphorus (mg/L) CO665
Monitor & Report
2/Month
Composite
Effluent
OM600
Monitor & Report
Monthly
Calculated
Effluent
(poundstmonth)
TP Load s,s
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 Section A.(7)].
2. Upstream: At least 100 feet upstream from the outfall. Downstream: At NCSR 1831.
3. TRC limit and monitoring requirements apply onlv if chlorine is used in the treatment process. See Section A.
(6) 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 or TP Load is the mass quantity of Total Nitrogen or Total Phosphorus discharged in a given period of
time. See Section A. (3) Calculation and Reporting of Nutrient Loads.
6. The facility is subject to nutrient limitations as specified in Special Condition A. (2) Combined Limitations
for Nutrients — Outfall COI I.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 11

Permit NCO049662
A. (2) COMBINED LIMITATIONS FOR NUTRIENTS — OUTFALL C01
a. During the period beginning on the effective date of this permit or as specified below and lasting
until permit expiration, the Permittee is further authorized to discharge Total Nitrogen and Total
Phosphorus from the Hawthorne Subdivision WWTP (NC0049662, Outfall 001) and the
Wildwood Green WWTP (NC0063614, Outfall 001) subject to the following combined,
discharge load limitations:
TOTAL NITROGEN
TOTAL PHOSPHORUS
(pounds/year) 1
(pounds/year) 1
Permit
Facility
Active Allocations
Active Allocations
Hawthorne
NC0049662
Subdivision WWTP
Subdivision
381
Wildwood Green
NCO063614
1;674
152
Combined Limits (pounds/year)
5,860
533
Footnote:
1. Limits in this table are the'sum of the combined discharge allocations for these facilities.
b. Compliance with these limits shall be determined in accordance with Special Conditions A. (4),
Annual Limits for Total.Nitrogen and,Tbtal Phosphorus, and A` (3), Calculation and Reporting
of Nutrient Loads.
c. Nutrient monitoring and reporting requirements are specified -in Special Conditions A. (1),
Effluent Limitations and Monitoring Requirements, and A. `(3), Calculation and Reporting of
Nutrient Loads.
d. Pursuant -to N.C..General Statute. Section. 143-215:,1 and the implementing rules found in Title
15A,6f the North Carolina Administrative Code; .specifically, 15A NCAC 02B.0270, and Part II,
Sections B-12 and'B-13,of this permit, the Division of Water Resources (Division) may reopen
the permits listed above and establish more stringent nutrient limits upon finding that such limits
are necessary to prevent `the discharges from causing localized water quality impacts in the
receiving 'streams.
e. The Permittee;may request that, its permits be modified to rescind these combined limits and
establish individualmass discharge limits for each facility. The Division may, after written
notification to the Permittee, rescind these combined limits and establish individual mass or
concentration discharge limits for each facility if it determines that the combined limits do not
support the objectives of -the Falls Lake or Neuse River Estuary Nutrient Management Strategies.
The Division shall provide for public review of the proposed permit modifications and include in
the permit an appropriate schedule of compliance for the proposed nutrient limits.
A. (3) CALCULATION AND REPORTING OF NUTRIENT LOADS
[G.S. 143-215.1 (b)]
a. The Permittee shall calculate monthly and annual TN and TP Loads for the Hawthorne Subdivision
WWTP (NC0049662) and for the Wildwood Green WWTP (NC0063614) as follows:
Page 5of11

Permit NC0049662
Monthly Discharge Load (pounds/month, TN or TP) = TN (or TP) x TMF x 8.34
where
TN (or TP) = average Total Nitrogen (or Total Phosphorus) concentration (mg/L) of the
composite samples collected during the month
TMF = Total Monthly Flow of wastewater discharged during the month
(MG/month)
8.34 = conversion factor, from (mg/L x MG) to pounds
ii. Annual Discharge Load (pounds/year, 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 the facility's discharge monitoring report for that month and each facility's
calendar year TN and TP discharge load in its December report for that year.
c. Reporting of Combined Nutrient Discharge Loads: The Permittee shall report each calendar year's
combined discharge loads with the Hawthorne Subdivision W WTP's December report for that year.
A. (4) ANNUAL LIMITS FOR TOTAL NITROGEN AND TOTAL PHOSPHORUS
[G.S. 143-215.1 (b)]
a. Total Nitrogen (TN) and Total Phosphorus (TP) allocations and load limits for NPDES
dischargers in the Neuse River Basin and Falls Lake watershed are annual loads and apply on a
calendar year basis.
b. For any given calendar year, the Permittee shall be in compliance with the annual TN (or TP)
Discharge Load limit in this Permit if:
i. the Permittee's annual TN (or TP) discharge load is not greater than the effective limit,
or
ii. the Permittee is a co-permittee member of a TN (or TP) compliance association.
c. If the Permittee is not a co-permittee member of a TN (or TP) compliance association and the
Permittee's cumulative annual TN (or TP) discharge exceeds the effective TN (or TP) Load limit
in this permit at any point during the calendar year, the Permittee is in violation of its TN (or TP)
Load limit, and each day of a continuing violation shall constitute a separate violation.
d. The TN (or TP) limit in this Permit may be modified as the result of allowable changes in the
Permittee's allocation.
i. Allowable changes include those resulting from the purchase, sale, trade, or lease of TN
(or TP) allocation between the Permittee and other dischargers; the purchase of nutrient
offset credit from a mitigation banker or other Division -approved sources;
regionalization; and other transactions approved by the Division.
ii. The Permittee may request a modification of the TN (or TP) Load limit in this Permit to
reflect allowable changes in its TN (or TP) allocation or credits. 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 (or TP) limits become effective on January 1 of the year following
permit modification unless specified otherwise in the permit. The Division must receive
Page 6of11

Permit NCO049662
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 (or TP) compliance
association, its TN (or TP) discharge during that year is governed by that association's group
NPDES permit and the TN (or TP) 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.,(or TP) allocations will be updated annually and
in accordance with state and federal,program requirements.
iii. If the Permittee intends to join or�leaye'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 anti proper.noti fication, the Division will modify the
group 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 (or TP) monitoring and reporting requirements --in thi`s,Petmit remain in effect until
expiration of this Permit and are not affected by the Ye- rmittee's membership in a compliance
association.
A. (5) TOTAL NITROGEN AND TOTAL, ALLOCATIONS
[G:S. 143-215.1 (b)] y
a. - The following table lists the Total Nitrogen (TN) allocation(s) assigned to, acquired by, or
transferred to the Permitteein accordance with the Neuse River nutrient management strategy
rule (T15A NCAC 02B.0234), and the status of each as of permit issuance. The allocations in
this table are not enforceable limits nor do they supersede any TN limit(s) established elsewhere
in this permit or in the NPI)ES permit of a compliance association of which the Permittee is a
Co-Permittee Member.
TN ALLOCATION'
ALLOCATION
SOURCE
DATE
STATUS
TYPE
Estuary
Discharge
(pounds/year)
(pounds/year)
Assigned by
Rule
12/7/1997
Base
(T15A NCAC
4/1/2003
506
5,055
Active
02B .0234)
TOTAL
506
5,055
Page 7of11

Permit NCO049662
Footnote:
1. Transport Factor = 10%
b. The following table lists the TN and TP allocation(s) assigned to, acquired by, or transferred to
the Permittee in accordance with the Falls Lake nutrient management strategy rule (T15A
NCAC 02B.0279) and the status of each as of permit issuance. The allocations in this table are
not enforceable limits nor do they supersede any TN or TP 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.
TN
TP
ALLOCATION
SOURCE
DATE
ALLOCATION
ALLOCATION
STATUS
TYPE
(pounds/year)
(pounds/year)
Assigned by
Base
Rule
12/16/2010
4,186
381
Active
(T15A NCAC
02B .0279)
TOTAL
4,186
381
c. 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. (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, under -perform, 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 (919/791-4200) 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 on a daily basis while this method of
disinfection is in use and values must be reported on the discharge monitoring report. TRC in
the effluent may not exceed 22 µg/L; 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 Permittee shall continue to record and submit all values reported
by a North Carolina certified laboratory (including field certified), even if these values fall
below 50 µg/L.
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.
Page 8 of 11

Permit NCO049662
A. (7) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[NCGS 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)lX
The permittee shall report discharge monitoring data elecironically using the NC-DWR's Electronic
Discharge Monitoring Report (eDMR) intemet application..
Monitoring results obtained during the previous month(s) shall besummarized for each month and
submitted electronically using eDMR. The eDMR system allows`pemitted facilities to enter
monitoring data and .submit-DMRs electronicallyusing the internet. Until such time that the state's
eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using_eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed 'original aiid.a copyIof the computer printed eDMR to the
following address:
NC DENR / Division of Water Resources / Water Quality Permitting Section
ATTENTION: 'Central Files_
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
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
mailing address above. 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.
Page 9of11

Permit NC0049662
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.
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:
httys://www.federalregister. gov/documents/2015/ 10/22/2015-24954/national-pollutant-discharee-
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://deg.nc.mov/about/divisions/water-resources/edmr
Page 10 of 11

4. Sienatory Rea uirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (I 1.)(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:
htti)://dgg.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 offines and imprisonment for knowing violations. "
5. Records Retention [Supplements Section D. (6.)l
The permittec 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
122.4].
Page 11 of 11

Aqua North Carolina, Inc.
Hawthorne Subdivision WWTP
NPDES Permit NCO049662
Receiving Stream: Upper Barton Creek Stream Class: WS-IV; NW
Stream Segment: 27-15-(1) Sub -Basin H: 03-04-01
River Basin: Neuse
County: Wake
HUC:0302020106
V
SCALE
1:33,000
Facility Location
scale not shown
1
USGS Quad: Bayleaf