NC0080691_Renewal (Application)_20241007

ROY COOPER
Governor
MARY PENNY KELLEY
Srvratary
RICHARD E. ROGERS, JR.
Director
Wesley Bishop
Aqua North Carolina Inc
202 Mackenan Ct
Cary, NC 27511
Subject: Permit Renewal
Application No. NCOO8O691
Windemere WWTP
Iredell County
Dear Applicant:
NORTH CAROLINA
Environmental Quality
October 07, 2024
The Water Quality Permitting Section acknowledges the October 7, 2024 receipt of your permit renewal application and
supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW permitting
branch. Per G.S. 150B-3 your current permit does not expire until permit decision on the application is made.
Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit. The
permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a
timely manner to requests for additional information necessary to allow a complete review of the application and renewal
of the permit.
Information regarding the status of your renewal application can be found online using the Department of Environmental
Quality's Environmental Application Tracker at:
https://www.deg.nc.gov/permits-rules/environmental-application-tracker
If you have any additional questions about the permit, please contact the primary reviewer of the application using the
links available within the Application Tracker.
Sincerely, A"'""'^l'
Cynthia Demery
Administrative Assistant
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
D�Q J Narth Cem Department at Emborunmtal QlWhY I Dlvb n of Waer Resources
MoortsMlk Ragltmal Oflke 1610 East Cemer Av ,, 5u1m 901I M.Wlk. North Carnilna 28115
�'��� T06.663.1699

AQUA.
*Essential Utilities Company
October 2, 2024
Division of Water Resources RECEIVED
Water Quality Permitting Section — NPDES
1617 Mail Service Center OCT 0 7 ; 024
Raleigh, North Carolina 27699-1617
NCDEQ/DWR/NPDES
Re: Application for Permit Renewal
Aqua North Carolina, Inc.
Windemere WWTP
NPDES No. NCO080691
Iredell County
To Whom It May Concern:
Enclosed are three (3) copies of the completed application Form 2A and necessary
attachments for your office to renew the subject permit.
Should you need any additional information or assistance, please feel free to contact me via
phone at [phone] or by email at [e-mail].
Sincerely,
Brent Milliron
Environmental Compliance Director
Aqua North Carolina, Inc.
Enc: NPDES Application, Form 2A w/ attachments
Windemere WWTP NCO080691 NPDES Permit
Cc: Shannon Becker, President, Aqua North Carolina
Lori Lester, Environmental Compliance Specialist 1
202 MacKenan Court, Cary, NC, 27511 • 919,467.8712 • AquaAmerica.com

NPDES Perme Number
Facility Name
Modified Application Form 2A
NCO080691
Windemere WWTP
Modified March 2021
1.7
Provide the collections stem information requested below for the treatment works.
Municipality
Population
Collection System Type
Ownership Status
Served
Served
indicate percentage)
Statesville, NC
202
100 % separate sanitary sewer
O Own ❑ Maintain
2
% combined storm and sanitary sewer
❑ Own ❑ Maintain
❑ Unknown
❑Own ❑ Maintain
_ % separate sanitary sewer
❑ Own ❑ Maintain
g
% combined storm and sanitary sewer
❑ Own ❑ Maintain
❑ Unknown
❑ Own ❑ Maintain
0
% separate sanitary sewer
❑ Own ❑ Maintain
%combined stone and sanitary sewer
❑ Own ❑ Maintain
❑ Unknown
❑ Own ❑ Maintain
d
%separate sanitary sewer ❑ Own ❑ Maintain
%combined storm and sanitary sewer ❑ Own ❑ Maintain
rn
c
❑ Unknown ❑ Own ❑ Maintain
Total zoz
°
Population
L)
Served
Separate Sanitary Sewer System Combined Storm and
SanitarySewer
Total percentage of each type of
100 % °
sewer line in miles)�°
z
1.8
Is the treatment works located in Indian Country?
c
'o
❑ Yes r❑ No
U
A
1.9
Does the facility discharge to a receiving water that flows through Indian Country?
c
❑ Yes ❑� No
1.10
Provide design and actual flow rates in the designated spaces.
Design Flow Rate
o.o90 mgd
Annual Averse Flow Rates Actual
N
9
Two Years Ago
Last Year
This Year
c o
0.013 mgd
0.015 mgd
0.018 mgd
dLL
Maximum Daily Flow Rates Actual
Two Years Ago
Last Year
This Year
0.023 mgd
0.036 mgd
0.036 mgd
v
1.11
Provide the total number of effluent discharge points to waters of the State of North Carolina by type.
Total Number of Effluent Dischar a Points b T
oo m
E F
Treated Effluent
Untreated Effluent
Combined Sewer
Bypasses
Constructed
Emergency
u
Overflows
Overflows
ut
�
1
Page 2

NPDES Permit Number
Facility Name
Modified Application Form 2A
NCO080691
Windemere WWiP
Modified March 2021
Oulfalls Other Than to Waters of the State of North Carolina
1.12
Does the POTW discharge wastewater to basins, ponds, or other surface impoundments that do not have outlets
for discharge to waters of the State of North Carolina?
❑ Yes ❑� No 4 SKIP to Item 1.14.
1.13
Provide the location of each surface impoundment and associated discharge information in the table below.
Surface Impoundment Location and Discharge
Data
Average Daily Volume
Continuous or Intermittent
Location
Discharged to Surface
(check one)
Impoundment
❑ Continuous
gpd
❑ Intermittent
❑ Continuous
gpd
❑ Intermittent
❑ Continuous
gpd
w
❑ intermittent
r
1.14
Is wastewater applied to land?
2
❑ Yes No 4 SKIP to Item 1.16.
N
1.15
Provide the land application site and discharge data requested below.
N
Land Application Site and Discharge Data
'o
Average Daily Volume
Continuous or
Location
Size
Applied
Intermittent
o
check one
L
acres
❑ Continuous
0
gpd
❑ Intermittent
z
acres
gp d
❑ Continuous
❑ Intermittent
a
acres
❑ Continuous
q
gpd
❑ Intermittent
1.16
Is effluent transported to another facility for treatment prior to discharge?
0
0
El Yes 0 No 4 SKIP to Item 1.21.
1.17
Describe the means by which the effluent is transported (e.g., tank truck, pipe).
1.18
Is the effluent transported by a party other than the applicant?
❑ Yes ❑ No + SKIP to Item 1.20.
1.19
Provide information on the transporter below.
Transporter Data
Entity name
Mailing address (street or P.O. box)
City or town
State
ZIP code
Contact name (first and last)
Title
Phone number
Email address
Page 3

NPDES Permit Number
Facility Name
Modified Application Form 2A
NCO080691
Windemere WWrP
Modified March 2021
1.20
In the table below, indicate the name, address, contact information, NPDES number, and average daily flow rate of the
receiving facility.
Receiving F
clifty Data
a
Facility name
Mailing address (street or P.O. box)
d
City or town
State
ZIP code
0
0
Contact name (first and last)
Title
0
L
d
Phone number
Email address
o
NPDES number of receiving facility (if any) ❑ None
Average daily flow rate mgd
a
N
1.21
Is the wastewater disposed of in a manner other than those already mentioned in Items 1.14 through 1.21 that do
dnot
have outlets to waters of the State of North Carolina (e.g., underground percolation, underground injection)?
z
❑ Yes ❑ No 4 SKIP to Item 1.23.
u
0
1.22
Provide information in the table below on these other disposal methods.
Information on Other Dis osal Methods
o
Disposal
Location of
Size of
Annual Average
Continuous or Intermittent
Method
Disposal Site
Disposal Site
Daily Discharge
(check one)
Description
Volume
s
acres
gpd
❑ Continuous
❑ Intermittent
0
acres
❑ Continuous
gpd
❑ Intermittent
acres
gpd❑
❑ Continuous
Intermittent
1.23
Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(n)? (Check all that apply.
Consult with your NPDES permitting authority to determine what information needs to be submitted and when.)
A
❑ Discharges into marine waters (CWA ❑ Water quality related effluent limitation (CWA Section
Section 301(h)) 302(b)(2))
❑✓ Not applicable
1.24
Are any operational or maintenance aspects (related to wastewater treatment and effluent quality) of the treatment works
the responsibility of a contractor?
❑ Yes ❑✓ No 4SKIP to Section 2.
1.25
Provide Iocabon and contact information for each contractor in addition to a description of the contractor's operational
and maintenance res onsibilifies.
Contractor Information
Contractor 1
Contractor 2
Contractor 3
Contractor name
7'a
(company name
€
Mailing address
`c
street or P.O. box
City, state, and ZIP
code
cContact
name (first and
U
last
Phone number
Email address
Operational and
maintenance
responsibilities of
contractor
Page 4

NPDES Permit Number Facility Name Modified Application Forth 2A
NCO080691 Windemere WWTP Modified March 2021
SECTION ADDITIONAL INFORMATION
o Outfalis to Waters of the State of North Carolina
2.1
Does the treatment works have a design flow greater than or equal to 0.1 mgd?
c
❑ Yes ❑✓ No + SKIP to Section 3.
c
2.2
Provide the treatment works' current average daily volume of inflow
Average Daily Volume of Inflow and Infiltration
E9Pd
and infiltration.
c
Indicate the steps the facility is taking to minimize inflow and infiltration.
v
c
A
3
O
C
C
t
2.3
Have you attached a topographic map to this application that contains all the required information? (See instructions for
A
specific requirements.)
o
F
❑ Yes ❑ No
E
2.4
Have you attached a process flow diagram or schematic to this application that contains all the required information?
c I
(See instructions for specific requirements.)
c
❑ Yes ❑ No
2.5
Are improvements to the facility scheduled?
❑ Yes ❑ No 4 SKIP to Section 3.
Briefly list and describe the scheduled improvements.
c
0
A
1.
c
E
E
n
2.
E
`o
d
3.
v
d
u
N
4.
0
A
2.6
Provide scheduled or actual dales of completion for improvements.
Scheduled or Actual Dates of Completion for Improvements
e
>
Scheduled
Affected
Outfalls
Begin
End
Begin
Attainment of
Operational
o
Improvement
(fistnumber) all
Construction
Construction
Discharge
el
E
(from above)
(MMIDDIYYYY)
(MMIDDIYYYI�
(MMIDDIYYYI�
MMIDD
a
v
1.
w
t
U)
2.
3.
4.
2.7
Have appropriate permits/clearances concerning other federal/state requirements been obtained? Briefly explain your
response.
❑ Yes ❑ No ❑ None required or applicable
Explanation:
Page 5

NPDES Permit Number Facility Name Modified Application Form 2A
NC0080691 Windemere WWiP Modified March 2021
SECTION•• • ON DISCHARGES
3.1 Provide the following information for each outfall. (Attach additional sheets if you have more than three outfalls.)
Outfall Number 001
Outfall Number_
Outfall Number
State
NC
w
m
County
Iredell
O
0
City or town
Statesville
`s
Distance from shore
75 ft.
n
Depth below surface
o ft.
0
Average daily flow rate
0.015 mgd
mgd
mgd
Latitude
35° 40' 04" N
• „
Longitude
80° 5-/ 55" W
"
3.2
Do any of the oulfalls described under Item 3.1 have seasonal or periodic discharges?
o
❑ Yes ✓❑ No 4 SKIP to Item 3.4.
d
3.3
If so, provide the following information for each applicable outfall.
L
Outfall Number
Outfall Number
Outfall Number
a
a
Number of times per year
s
discharge occurs
a
Average duration of each
`o
discharge (specify units
o
Average flow of each
mgd
mgd
an g d
dischar e
in
Months in which discharge
occurs
3.4
Are any of the outfalls listed under Item 3.1 equipped with a diffuser?
❑✓ Yes ❑ No 4 SKIP to Item 3.6.
3.5
Briefly describe the diffusert peat each applicable outfall.
m
Outfall Number 001
Outfall Number_
Outfall Number_
m
Effluent tank has diffusers that
o
generates oxygen into the
discharge line.
Does the treatment works discharge or plan to discharge wastewater to waters of the State of North Carolina from
vi
C
3 6
one or more discharge points?
0 Yes ❑ No +SKIP to Section 6.
Page 6

NPDES Permit Number
Facility Name
Modified Application Form 2A
NC0080691
Windemere WWTP
Modified March 2021
3.7
Provide the receiving water and related information if known for each outfall.
Outfall Number 001
Outfall Number_
Outfall Number_
Receiving water name
Catawba River
Name of watershed, river,
Catawba River
0
or stream system
U.S. Soil Conservation
H
Service 14-digit watershed
o
code
Name of state
Catawba
management/riverbasin
m
U.S. Geological Survey
8-digit hydrologic
cataloging unit code
Critical low flow (acute)
cfs
ds
cfs
Critical low flow (chronic)
cfs
ds
cfs
Total hardness at critical
mg/L of
mg/L of
mg/L of
low flow
CaCO3
CaCO3
CaCO3
3.8
Provide the following information describing the treatment provided for discharges from each outfall.
Outfall Number 001
Outtall Number_
Outfall Number_
Highest Level of
❑ Primary
❑ Primary
❑ Primary
Treatment (check all that
❑ Equivalent to
❑ Equivalent to
❑ Equivalent to
apply per outfall)
secondary
secondary
secondary
El Secondary
❑ Secondary
❑ Secondary
❑ Advanced
❑ Advanced
❑ Advanced
❑ Other (specify)
❑ Other (specify)
❑ Other (specify)
0
0
Design Removal Rates by
Outfall
N
d
BOD5 or CBOD5
85 %
%
%
c
E
E
d
TSS
85 %
%
%
0 Not applicable
❑ Not applicable
❑ Not applicable
Phosphorus
%
%
%
0 Not applicable
❑ Not applicable
❑ Not applicable
Nitrogen
%
%
%
Other (specify)
0 Not applicable
❑ Not applicable
❑ Not applicable
%
%
%
Page 7

NPOES Permit Number
Facility Name
Modified Applicabon Form 2A
NCO080691
Windemere WWTP
Modified March 2021
3.9
Describe the type of disinfection used for the effluent from each outfall in the table below. If disinfection varies by
season, describe below.
a
a
c
C
O
U
Oulfall Number 001
Outfall Number
Oulfall Number
o
.E-
Disinfection type
Tablet Chlorination w/contact
U
y
tank
G
�
Seasons used
All
d
E
a
Dechlonnation used?
❑ Not applicable
❑ Not applicable
❑ Not applicable
❑✓ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
3.10
Have you completed monitoring for all Table A parameters and attached the results to the application package?
❑r Yes ❑ No
3.11
Have you conducted any WET tests during the 4.5 years prior to the dale of the application on any of the facility's
discharges or on any receiving water near the discharge points?
❑ Yes ❑✓ No 4 SKIP to Item 3.13.
3.12
Indicate the number of acute and chronic WET tests conducted since the last permit reissuance of the facility's
discharges by outfall number or of the receivingwater near the discharge points.
Outfall Nu ber
Outfall Number
Outfall Number_
Acute
Chronic
Acute
Chronic
Acute
Chronic
A
Number of tests of discharge
rn
water
d
Number of tests of receiving
~
water
d
W
3.14
Does the POTW use chlorine for disinfection, use chlorine elsewhere in the treatment process, or otherwise have
reasonable potential to discharge chlorine in its effluent?
✓❑ Yes 4 Complete Table B, including chlorine. ❑ No 4 Complete Table B, omitting chlorine.
3.15
Have you completed monitoring for all applicable Table B pollutants and attached the results to this application
package?
❑� Yes ❑ No
Have you completed monitoring for all applicable Table D pollutants required by your NPDES permitting authority and
3.18
attached the results to this application package?
El Yes 0 No additional sampling required by NPDES
permittingauthority.
Page 8

NPDES Permit Number
Facility Name
Modified Application Form 2A
NCO080691
Windemere WWTP
Modified March 2021
3.19
Has the POTW conducted either (1) minimum of four quarterly WET tests for one year preceding this permit application
or (2) at least four annual WET tests in the past 4.5 years?
El Yes 0 No + Complete tests and Table E and SKIP to
Item 3.26.
3.20
Have you previously submitted the results of the above tests to your NPDES permitting authority?
❑ Yes ❑ No + Provide results in Table E and SKIP to
Item 3.26.
3.21
Indicate the dates the data were submitted to our NPDES permitting authority and provide a summary of the results.
Datil SubmWed
Summary of Results
a
m
c
c
0
A
3.22
Regardless of how you provided your WET testing data to the NPDES permitting authority, did any of the tests result in
a
toxicity?
❑ Yes ❑ No SKIP to Item 3.26.
F3.23
Describe the cause(s) of the toxicity:
d
w
3.24
Has the treatment works conducted a toxicity reduction evaluation?
❑ Yes ❑ No 4 SKIP to Item 3.26.
3.25
Provide details of any toxicity reduction evaluations conducted.
3.26
Have you completed Table E for all applicable outfalls and attached the results to the application package?
❑ Yes 0 Not applicable because previously submitted
information to the NPDES permitting authority.
Page 9

NPDES Permit Number Facility Name Modified Application Form 2A
NC0080691 Windemere WWTP Modified March 2021
SECTION1
6.1
In Column 1 below, mark the sections of Form 2A that you have completed and are submitting with your application. For
each section, specify in Column 2 any attachments that you are enclosing to alert the permitting authority. Note that not
all applicants are required to provide attachments.
Column 1
Column 2
El Section 1: Basic Application
❑ wl variance request(s) ❑ wl additional attachments
Information for All licants
❑ Section 2: Additional
r
❑r w/ topographic map 0 w/ process flow diagram
Information
❑ wl additional attachments
© w/ Table A ❑ w/ Table D
0 Section 3: Information on
✓❑ wf Table B ❑ w/ additional attachments
Effluent Discharges
E
❑ w/ Table C
d
"'
Section 4: Not Applicable
0
w
Section 5: Not Applicable
c
d
U
,=
Section 6: Checklist and
❑
Elwl attachments
Certification Statement
N_
Y
6.2
Certification Statement
1 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 property 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 fine
and imprisonment for knowing violations.
Name (print or type first and last name)
Official title
Brent Milliron
Envir. Compliance Director
Signature
Date signed
10/01/2024
Papa 10

NPDES Permit Number
Facility Name
Outiall Number
NCO080691
WindW emere WiP
001
Modified Application Form 2A
Modified March 2021
Maximum Daily Discharge
Average Daily Discharge
Analytical ML or MDL
Value
Units
Pollutant
Number of
Value Units Method (include units)
Sam les
Biochemical oxygen demand
o BODs or ❑ CBODs
25
mg/L
0.71
mg/L
218 SM52108 2.0 0 MIL
0 MDL
(report one
Fecal coliform
360
M/looml
8.39
1r/100ml
206 SM9222D (MFI 1.0 MIL
11 MDL
Design Flow rate
36,000
gallons
14,572
gallons
1462
pH (minimum)
6.2
units
pH (maximum)
9.4
units
Temperature (winter)
17
degrees Celsius
11.34
degrees Celsius
95
Temperature (summer)
29
degrees Celsius
22.77
degrees Celsius
126
Total suspended solids (TSS)
11.5
mg/L
1.07
mg/L
218 SM2540D 2.5 O MDL
'Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter Nor 0. See instructions and 40 CFR 122.21(e)(3).
Page 11

IES Permit Number Fadlity Name Oudall Number Modified Applicalion Form 2A
NCO080691 Windemere WWTP 001 Modified March 2021
e• 'e e e
Maximum Daily Discharge
• � I �
Average Daily Discharge
Analytical
ML a MDL
Value
Units
Numbers
Pollutant
Value Units
Merthodt
(include units)
Samples
Ammonia (as N)
3.75
mg/L
0.08
mg/L
213
SM4500141431)
DMIL
0.2 OO MDL
Chlorine
45
ug/L
2.92
ug/L
439
Field -Hach DPD
❑ MIL
❑ MDL
residual, TRC :
Dissolved oxygen
13.3
mg/L
9.26
mg/L
215
Field -Hach DPD
❑ MDL
Nitrate/nitrite
50.80
mg/L
18.96
mg/L
17
HACH 10206
0.3 mg/L ZML
0 MDL
Keldahl nitrogen
38
mg/L
5.11
mg/L
17
HACH 10242,REV. 1.
2 MIL
1.0 mg/L 0 MDL
Oil and grease
11 MIL
❑ MDL
Phosphorus
9.65
mg/L
3.8
mg/L
18
SM4500 PE-2021
0.16 mg/L 0 MIL
0 MDL
❑ MIL
Total dissolved solids
❑ MDL
Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
2 Facilities that do not use chlorine for disinfection, do not use chlorine elsewhere in the treatment process, and have no reasonable potential to discharge chlorine in their effluent are not
required to report data for chlorine.
EPA Form 3510-2A (Revised 3-19) Page 12

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Windemere WWTP
Raw Effluent NCO080691
Process Flow Diagram
Bar Screen
Equalization Dual Dual Tertiary
Tank Aeration Filters
Basins Clarifiers
Chlorine Contact
Aerated Sludge
Holding Tank
Dechlorination
Pumped
and
Hauled
Aeration
Outfa 11001