NC0085863_Permit Issuance_20181002

ROY COOPER
C.oTerna,
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
fnrertm Director
NORTH CAROLINA
Environmental Quality
October 2, 2018
Shannon V. Becker, President
c/o Amanda Owens, Manager Environmental Compliance
AQUA North Carolina, hie.
202 MacKenan Court
Cary, North Carolina 27511
Subject: Issuance of NPDES Permit NCO085863
Waterfall Plantation Water Treatment Plant (WTP)
off Mica Mine Lane [NCSR 1923], Wake Forest
Wake County
Dear Mr. Becker:
The Division of Water Resources (DXVR of the Division) has approved your application to renew the
subject permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is
issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency dated October 15, 2007 (or as subsequently amended).
We understand that the subject WTP has made no significant changes to treatment -system or
treatment processes since last renewal. Note that this facility is not currently eligible for General
Permit NCG590000 (NCG59) because the Neuse River Basin Permitting Strategy requires
specific monitoring not possible under NCG59, namely Total Manganese (limited; data show
reasonable potential to exceed 200 ug/L for Water Supply), Total Nitrogen (TN) and Total
Phosphorus (TP).
Changes to Your Previous Permit - We have updated your site -vicinity map and the facility
description on the Supplement to Permit Cover Sheet. We have also added regulatory citations to
each section for your information.
Division records show that you have successfully registered with the eDMR Program. Please be
reminded that until the state's eDMR application is approved compliant with EPA's Cross -
Media Electronic Reporting Regulation (CROMERR), all permittees must continue to submit
hardcopy of DMRs as backup to eDMR reporting [see permit section A. (2)].
r _ DiiwF Q
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1.617 - 919.707.9000

Shannon V. Becker, President
Issuance — NC0085863
020ct20I8
Page 2
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable, you have the right to an adjudicatory hearing upon written request within thirty
(30) days following receipt of this letter. This request must take the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714).
Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may modify or revoke and reissue this permit. This permit does not affect your legal
requirements to obtain other permits required by the Division of Water Resources, the Division
of Land Resources, the Coastal Area Management Act or any other federal or local government.
If you have questions concerning this permit modification, please contact Joe R. Corporon P.G.
[e-mail]] or call his new direct line [phone].
qLda
-
cpepper, Int irector
Division of Water Resources
Enclosure [issuance final NC0085863]
CC. NPDES Permit file
Central Files
ec. RRO, Attn: Danny Smith, SWQ Protection Supervisor; Vanessa Manual
OCU, Maureen Kinney
AQUA, Amanda Owens, Manager Environmental Compliance [[e-mail]]
vQ�,1�

Permit NCO085863
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
I U ; I ffM W-1
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
DES
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
Waterfall Plantation WTP
off Mica Mine Lane [NCSR 1923], Wake Forest
Wake County
to receiving waters designated as Horse 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 November 1, 2018.
This permit and authorization to discharge shall expire at midnight on January 31, 2023.
Signed this day October 2, 2018.
L' a Culpepper, Interim Direc r
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 6

Permit NCO08586S
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.
Aqua North Carolina, Inc.
is hereby authorized to:
1. continue to operate a filter -backwash treatment system employing greensand filtef technology to
treat groundwater in support of potable -water production at 0.005 MGD [single wellhead],
generating backwash discharge averaging 0.0018 MGD [-30 minutes, 4 days/Week], utilizing
• single groundwater well
• raw water detention tank [5,000 gal]
• booster pumps
• dual (2) greensand filters [w/ backwash floor drains to final sandbed]
• valve and flowmeter
• booster pumps to backwash storage tank [10,000 gal]
• tablet chlorination / dechlorination / phosphate additive
• potable water to 10,000-gal storage tank, to distribution system
• wastewaters to final sandbed filter
• discharge line to effluent sample point and outfall;
these facilities located at the Waterfall Plantation WTP, off Mica Mine Lane [NCSR 1923],
Wake Forest, Wake County; and
2. discharge from said treatment works via Outfall 001, at the location specified on the attached map,
into Horse Creek [Stream Segment 27-17-(2)], a waterbody currently classified WS-IV; NSW; CA
within subbasin 03-04-01 [HUC: 03020201 ] of the Neuse River Basin.
Page 2 of 6

Permit NCO085863
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 15A NCAC 02B .0500 et seq.];
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge filter backwash from Outfall 001. Such discharges shall be limited,
monitored and reported 1 by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
(PARAMETER CODE]
LEMM
MONITORING REQUI1tEMENTS
Monthly
Average
Daily
I Maximum
Measurement
Frequen
Sample
"Sample
Location
Flow
50050
2/Monthly
Estimate 2
Effluent
Total Suspended Solids
(TSS)
C0530
30.0 mg/L
45.0 mg/L
2/Monthly
Grab
Effluent
Total Residual Chlorine
50060
28 µg/L 3
2/Monthly
Grab
Effluent
pH [standard units]
00400
Not < 6.0 or > 9.0 s.u.
2/Monthly
Grab
Effluent
Turbidity (NTU)
00070
Monitor & Report
Monthly
Grab
Effluent
Total Manganese (µg/L)
01055
Monitor & Report
Monthly
Grab
Effluent
Total Hardness (mg/L)
00900
Monitor & Report
Quarterly
Grab
Effluent
Total Nitrogen (TN) 4
C0600
Monitor & Report (mg/L)
Semi-annually
Calculated
Effluent
Total Phosphorus (TP)
C0665
Monitor & Report (mg/L)
Semi-annually
Grab
Effluent
Footnotes:
1. The Permittee is required to submit discharge monitoring reports electronically using the
Division's eDMR system program [see A. (2)].
2. The Permittee shall determine waste -flow discharge by estimating the rate, duration and number
of backwash/rinse events.
3. The Division shall consider compliant all -effluent TRC values reported below 50 µg/L. However,
the Permittee shall continue to record and submit all values reported by a North Carolina
certified test method (including field certified), even if these values fall below 50 µg/L.
4. For a given wastewater sample, TN = (NOrN + NO3 N) + TKN, where TN is Total Nitrogen,
(NO2 N + NO3 N) is Nitrite/Nitrate Nitrogen, and TKN is Total Kjeldahl Nitrogen.
Condition:
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
Page 3 of 6

Permit NC0085863
A. (2.) 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.)
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Signatory Requirements
Reporting
Records Retention
Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5_
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. 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 and a copy of the computer printed eDMR 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
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 4 of 6

Permit NC0085863
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:
https://www.federalreig ster.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:
h!W:Hdeg.nc.gov/about/divisions/Water-resources/edmr
Page 5 of 6

Permit NCO08586-T
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.)
LC
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 H,
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:
bqp://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:
V 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 qual fied 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].
Page 6 of 6

Horse Creek
�,- 1, J1�—flowsNE i
,\���5Aji,�\�S p �•
0utfa11001
IJ \r-� ��� 0 I ( �� (Flows NE) /t % �✓ raU -�'.- � � �.
NC Hwy 98 • �, L� .. ` `
e S:
.t �''° T�i� - t'c" -•. 'i l � �'�� .t "\ J NC HwyIT
Aqua North Carolina, Inc. Facility
Waterfall Plantation WTP
Location
HUC: 03020201 Receiving Stream: Horse Creek
Latitude: 350 58' 54" N Subbasin: 03-04-01
Longitude: 780 33' 8" W Stream Class: WS-IV; NSW
stream Segment: 27-17-(2) State Grid/Ouad: D24NE/Wake Forest North [7�—
PDES Pennit NC0011863
Wake County

NANDO21b
MCClatchy
The flews 8 Observer
RaMrl)mwll51
MEDIA COMPANY s�Bi9 1z 15000
consult. strategize. deliver.
AFFIDAVIT OF PUBLICATION
Account#
Ad Number
Identification
PO
Cols
Lines
104811
0003757332
NPDES Wastewater Permit/ Horse Creek in Neuse River Basin
1
37
Attention:
DEPARTMENT OF WATER RESOURCES
1617 MAIL SERVICE CENTER
RALEIGH, NC 276991617
Nbo: July 12, Z18
Es=
STATE OF NORTH CAROLINA
rKem;��ee�rr�_e�
Before the undersigned, a Notary Public of
Johnston County, North Carolina, duly
commissioned and authorized to administer
oaths, affirmations, etc,, personally appeared
BETSY WOMBLE, who being duly swom or
affirmed, according to law, doth depose and
say that he or she is Accounts Receivable
Specialist of the News 8 Observer Publishing
Company, a corporation organized and doing
business under the Laws of the State of
North Carolina, and publishing a newspaper
known as The News 8 Observer, Wake
County and State aforesaid, the said
newspaper in which such notice, paper,
document, or legal advertisement was
published was, at the time of each and every
such publication, a newspaper meeting all of
the requirements and qualifications of Section
1-597 of the General Statutes of North
Carolina and was a qualified newspaper
within the meaning of Section 1-597 of the
General Statutes of North Carolina, and that
as such he or she makes this affidavit; and is
familiar with the books, files and business of
said corporation and by reference to the files
of said publication the attached advertisement
for DEPARTMENT OF WATER RESOURCES
was inserted in the aforesaid newspaper on
dates as follows:
1 Insertion(s)
Published On:
July 12, 2018
BETSY WOMBLE, Accounts Receivable
Specialist
Sworn to and subscribed before me this
12th day of July, 2018
My Commission Expires: 7/20/2021
Notary Signature

FACT SHEET FOR EXPEDITED PERMIT RENEWAL
This form completed by Permit Writers for all expedited permits which do not require full Fact
Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile home parks,
etc) that can be administratively renewed with minor changes, but can include facilities with more
complex issues (Special Conditions, 303(d) listed water, toxicity testing, instream 7,p-,
nng,
compliance concerns). Basic Information for Expedited Permit Renewals I/
Permit Writer/Date
Joe R. Corporon, L.G. 28Jun2018
Permit Number
NCO085863
Facilit Name
Aqua NC — Waterfall Plantat' n WTP
Basin Name/Sub-basin number
Neuse River Basin / 03-04 1
Stream
Horse Creek
-Receiving
Stream Classification in Permit
WS-IV; NSW CA
Does permit need Daily Max NH3 limits?
No
Does permit need TRC limitsAanguage9
Already exists
Does permit have toxicity testing?
Not required of greensand tech.
Does permit have Special Conditions?
No
Does permit have instream monitoring?
No
Is the stream impaired on 303 d list)?
No
Any obvious compliance concerns?
No
Any permit mods since last permit?
2/8/2012 modification implemented parts of 2009
WTP strategy.
Current expiration date
31Jan2018
New expiration date
31 Jan2023
Eligibility for General Permit NCG590000
Facility not eligible for NCG59 because monitoring
is required for TN/TP (Meuse River Basin Strategy)
parameters not included in the general permit for
eensand;
Permit NC0085863 was last issued (2013) in accord with 2009 WTP permitting guidance for
Greensand filters. Renewal is updated per this strategy.
Permitting Decisions and Rationale 2018:
1. applied WTP strategy for greensand-type treatment technology;
2. facility does not use zinc ortho-phosphate, therefore Zn monitoring not required;
3. discontinued monitoring for Total Iron [per strategy];
4. retain Manganese, ' , monitor Monthly;
[RPA "max predicted" 40,848 ug/L vs. "allowable" 200 ug/L;
5. added Total Hardness to evaluate metals in dissolved fraction;
6. all other effluent databases suggest no impact to the receiving waterbody,
7. Whole Effluent Toxicity (WET) -testing not required ofgreensand;
8. waste flow = 0.0032 MGD discharges 2 to 3 times week for — 2 hours,
not to exceed 64,000 gallons per week [max well pumping rate];
9. Nutrient monitoring TN/TP required in permit to establish loading at the estuary
[TN (<0.3 mg/L max.) and TP (< 0.9 mg/L max.)], Neuse River Basin
Monitoring Strategy,
10. sludge management plan is adequate.

2018 Generic RPA - 95% Probability/95% Confidence
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1. Project Information
❑CHECK IF HQW OR ORW
Facility Name
Waterfall Plantation WTP
WWTP/WTP Class
PC-1
NPDES Permit
NC0085863
Outfall
001
Flow, Qw (MGD)
0.007
Receiving Stream
Ut to Horse Creek
Stream Class
WS-IV; NSW;CA
HUC Number
3020201
7Q10s (cfs)
0.00
7Q10w (cfs)
0.00
30Q2 (cfs)
0.00
CIA (cfs)
0.00
1Q10s (cfs)
0.00
Data Source(s)
❑CHECK TO APPLY MODEL
v directions for data entry. In some cases a
,ent menu list the available choices or a
own menu will provide a list you may select
Error message occur if data entry does not
input criteria.
Par01
Par02
Par03
Par04
Par05
Par06
Par07
Par08
Par09
Par10
Par11
Par12
Par13
Par14
Par15
Par16
Par17
Par18
Par19
Par20
Par21
Par22
Table 2. Parameters of Concern
Name Typo Chronic Modifier Acute POL Units
Total Manganese NC 200 WS 200 1 ug/L
85863 RPA for Total Manganese.xlsm, input
6/28/2018

Waterfall Plantation WTP REASONABLE POTENTIAL ANALYSIS
NCO085863 2018 Generic RPA - 95% Probability/95% Confidence
MAXIMUM DATA POINTS = 58
Qw(MGD)= 0.6600 WWTP/WTP Class: PC-1
IQIOS(crx)= 0.00 IWC% @ IQIOS = 100
7Q I OS let's)= 0.00 IWC% rJ7Q10S= 100
7QIOW(cls)= 0.00 IW%C@7QIOW= 100
30Q2 (cCs) = 0.00 IWC%@ 3OQ2 = 100
Avg. Stream Plow, QA (cfs) = 0.00 IWC%@ QA = 100
Receiving Stream: Lit to Horse Creek Stream Class: WS-IV; NSW;CA
PARAMETER
NC STANDARDS OR EPA CRITERIA
y
REASONABLE POTENTIAL RESULTS
TYPE
J
F
z
Applied
Chronic Acute
a
n
n N Dct, Mix Pred Cw Allowable Cw
:
Standrd
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute: 200
Total Manganese
NC
200 WS(7QI0s) 200
1.00
ug/I.
17 15
40848
Chronic: 200
2 aaluc(s) ? Allowable Cw
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chr_ onic:_----_----
Acute:
0 0
N/A
_ _ _ _
Chronic:
Acute:
0 0
N/A
_ _ hronic___:
C
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic: --------
Acute:
0 0
N/A
Chronic:----------
85863 RPA for Total Manganese.xlsm, rpa
Page 1 of 4 6/28/2018

Waterfall Plantation WTP REASONABLE POTENTIAL ANALYSIS
NCOOBS863 2018 Generic RPA - 95% ProbabilIN195% Confidence
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
Acute:
0 0
N/A
Chronic:
85863 RPA for Total Manganese.xlsm, rpa
Page 2 of 4 6/2W2018

REASONABLE POTENTIAL ANALYSIS
Date Data
Total Manganese I Values- than -COP
. Maximum tlMa
points=0
BDL=112DL
1.1 0.55
17.5 17.5
1.1 0.55
1.61 1.61
15 15
5.16 5.16
26.7 26.7
5.48 5.48
1.68 1.68
12.1 12.1
7.97 7.97
72.6 72.6
4.5 4.5
963 963
13800 13800
6.7 6.7
8.9 8.9
Results
Std Dev. 3337.5430
Mean 879.4118
C.V. 3.7952
n 17
Mult Factor = 2.9600
Max. Value 13800.0 ug/L
Max. Fred Cw 40848.0 ug/L
NO PARAMETER DEFINED
Date Data BDL=112DL Results
1 Std Dev,
2 Mean
3 C.V.
4 n
Mult Factor =
Max. Value
Max. Fred Cw
Values" then',
Maximum ,
points • 6
L�
NO DATA
NO DATA
NO DATA
0
N/A
N/A
NIA
-3-
85863 RPA for Total Manganese.xlsm, data
6/28/2018