NC0064378_Renewal (Application)_20220825

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ELIZABETHSBISER
Secretory " 9'
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
August 25, 2022
Carolina Water Service Inc of North Carolina
Attn: Dana Hill, Director of Operations
4944 Parkway Plaza Blvd, Ste 375
Charlotte, NC 28217
Subject: Permit Renewal
Application No. NC0064378
Willowbrook WWTP
Wake County
Dear Applicant:
The Water Quality Permitting Section acknowledges the August 25, 2022, 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://deq.nc.gov/permits-regulations/permit-guidance/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,
i1Oki
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
cc: Brent Milliron-CWSNC
ec: WQPS Laserfiche File w/application
n North Carolina Department of Environmental Quality I Division of Water Resources
C �/ Raleigh Regional Office 13800 Barrett Drive I Raleigh.North Carolina 27609
o.=.ri D / 919.791.4200

1
1
Ell Carolina Water Service
lied of North Carolina"
August 23, 2022
Wren Thedford
Division of Water Resources
Water Quality Permitting Section—NPDES
Archdale Building—9th Floor
512 North Salisbury Street RECEIVED
Raleigh,NC 27604
AUG 25 2022
Subject: NPDES Permit Renewal Application NC
Willowbrook Subdivision WWTP DEQIDWRINPDES
NPDES NC0064378
Wake County
Wren Thedford,
Please find the enclosed application as our official request to renew the NPDES permit for the facility
referenced above.
If you should have any questions or need any additional information, please do not hesitate to contact
Dana Hill (252-269-2540), Stephen Harrell (919-868-4701) or myself.
Sincerely,
AL----1--
Brent Milliron
Regulatory Compliance Manager
cc: Dana Hill—Director of State Operations, CWSNC
Stephen Harrell—Area Manager, CWSNC
•4944 Parkway Plaza Blvd.Suite 375 •Charlotte,North Carolina 28217 •800-525-7990
ii

NPDES Permit Number Facility Name Modified Application Form 2A
NC0064378 Willowbrook Subdivision WWTP Modified March 2021
Form NC Department of Environmental Quality-Application for NPDES Permit to Discharge Wastewater
NPDES MINOR SEWAGE FACILITIES(Before completing this form,please read the instructions.Failure to follow
the instructions ma result in denial of the a.plication.
SECTION 1.BASIC APPLICATION INFORMATION FOR ALL APPLICANTS(40 CFR 122.21(j)(1)and(9))
1.1 Facility name
Willowbrook Subdivision WWTP
Mailing address(street or P.O.box)
PO Box 240908
City or town State ZIP code
c Charlotte NC 28224
Contact name(first and last) Title Phone number Email address
w Dana Hill Director of Operations [phone] dana.hill@carolinawaterservic
Location address(street,route number,or other specific identifier) ❑ Same as mailing address
co
3623 Willow Tree Lane
City or town State ZIP code
Clayton NC 27520
1.2 Is this application for a facility that has yet to commence discharge?
❑ Yes 4 See instructions on data submission ❑ No
requirements for new dischargers.
1.3 Is applicant different from entity listed under Item 1.1 above?
❑ Yes ❑ No 4 SKIP to Item 1.4.
Applicant name
Carolina Water Service Inc.of North Carolina
Applicant address(street or P.O.box)
o PO Box 240908
io
€ City or town State ZIP code
Charlotte NC 28224
• Contact name(first and last) Title Phone number Email address
Dana Hill Director of Operations [phone] dana.hill@carolinawaterservic
1.4 Is the applicant the facility's owner,operator,or both?(Check only one response.)
O Owner ❑ Operator ❑ Both
1.5 To which entity should the NPDES permitting authority send correspondence?(Check only one response.)
CI Facility 0 Applicant ❑ Facility and applicant
(they are one and the same)
1.6 Indicate below any existing environmental permits.(Check all that apply and print or type the corresponding permit
number for each.)
Existing Environmental Permits
a ❑ NPDES(discharges to surface ❑ RCRA(hazardous waste) ❑ UIC(underground injection
control)
)
NC0064378
o ❑ PSD(air emissions) ❑ Nonattainment program(CM) ❑ NESHAPs(CM)
rn
❑ Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section ❑ Other(specify)
w 404)
Page 1

r
NPDES Permit Number Facility Name Modified Application Form 2A
NC0064378 Willowbrook Subdivision WWTP Modified March 2021
1.7 Provide the collection system information requested below for the treatment works. I
Municipality Population Collection System Type
, Served Served (indicate percentage) Ownership Status
100 %separate sanitary sewer 0 Own 0 Maintain
-p 169 connections; %
cu ^422 population combined storm and sanitary sewer ❑ Own 0 Maintain
co 0 Unknown 0 Own 0 Maintain
c %separate sanitary sewer ❑ Own ❑ Maintain
g %combined storm and sanitary sewer ❑ Own ❑ Maintain
c 1 0 Unknown ❑ Own ❑ Maintain
as %separate sanitary sewer ❑ Own ❑ Maintain
73 I %combined storm and sanitary sewer ❑ Own 0 Maintain
cu 0 Unknown 0 Own 0 Maintain
E %separate sanitary sewer ❑ Own 0 Maintain
>, %combined storm and sanitary sewer ❑ Own 0 Maintain
c ❑ Unknown 0 Own D Maintain
0 1 Total 422
°' i Population
o Served
Separate Sanitary Sewer System Combined Storm and
Sanitary Sewer
Total percentage of each type of 100
sewer line(in miles) -- -
z' 1.8 Is the treatment works located in Indian Country?
c
0
❑ Yes El No
U
= 1.9 Does the facility discharge to a receiving water that flows through Indian Country?
co
c 0 Yes CI No
1.10 Provide design and actual flow rates in the designated spaces. Design Flow Rate
.03 mgd
c Annual Average Flow Rates(Actual)
vI Two Years Ago Last Year This Year
C o .014 mgd .015 mgd .013 mgd
0 Er Maximum Daily Flow Rates(Actual)
cl
Two Years Ago Last Year This Year
.048 mgd .039 mgd .018 mgd
u) 1.11 Provide the total number of effluent discharge points to waters of the State of North Carolina by type.
c Total Number of Effluent Discharge Points by Type
a a Constructed
CD rn a, Combined Sewer
Treated Effluent Untreated Effluent Bypasses Emergency
t .o Overflows Overflows
,
in 1
_ i _.. _ __. _- - __- -._ -- ___ L
Page 2

NPDES Permit Number Facility Name Modified Application Form 2A
NC0064378 Willowbrook Subdivision WWTP Modified March 2021
Outfalls 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?
El 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
gpd ❑ Continuous
❑ Intermittent
❑ Continuous
I !
gpd ❑ Intermittent
❑ Continuous
gpd ❑ Intermittent
s 1.14 Is wastewater applied to land?
❑ Yes ❑r No 4 SKIP to Item 1.16.
c1.15 Provide the land application site and discharge data requested below.
H Land Application Site and Discharge Data
Average Daily Volume Continuous or
Location Size A lied Intermittent
En (check(check one)
Nacres d El Continuous
c gpd 0 Intermittent
acres d ❑ Continuous
o gp 0 Intermittent
0 acres d 0 Continuous
gp ❑ Intermittent
1.16 Is effluent transported to another facility for treatment prior to discharge?
o ❑ Yes ❑✓ No4SKIPtoItem1.21.
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 4 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
AIL

NPDES Permit Number Facility Name Modified Application Form 2A
NC0064378 Willowbrook Subdivision WWTP 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 Facility Data
1:3 Facility name Mailing address(street or P.O.box)
City or town State ZIP code
0
Contact name(first and last) Title
0
Phone number Email address
c NPDES number of receiving facility(if any) ❑None Average daily flow rate mgd
a
0 1.21 Is the wastewater disposed of in a manner other than those already mentioned in Items 1.14 through 1.21 that do
not have outlets to waters of the State of North Carolina(e.g.,underground percolation,underground injection)?
❑ Yes El No 4 SKIP to Item 1.23.
c 1.22 Provide information in the table below on these other disposal methods.
Information on Other Disposal Methods
Disposal Annual Average
o Location of Size of Continuous or Intermittent
Method Disposal Site Disposal Site Daily Discharge (check one)
Description Volume
acres gpd ❑ Continuous
❑ Intermittent
0 Continuous
acres gpd 0 Intermittent
acresgpd 0 Continuous
0 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.
S Consult with your NPDES permitting authority to determine what information needs to be submitted and when.)
2 g " ❑ Discharges into marine waters(CWA ❑ Water quality related effluent limitation(CWA Section
ca Section 301(h)) 302(b)(2))
El 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+SKIP to Section 2.
1.25 Provide location and contact information for each contractor in addition to a description of the contractors operational
and maintenance responsibilities.
Contractor Information
Contractor I Contractor 2 Contractor 3
c Contractor name
(company name)
oMailing address
(street or P.O.box)
City,state,and ZIP
code
cContact name(first and
last)
Phone number
Email address
Operational and
maintenance
responsibilities of
contractor
Page 4

r—
NPDES Permit Number Facility Name Modified Application Form 2A
NC0064378 Willowbrook Subdivision WWTP Modified March 2021
SECTION 2.ADDITIONAL INFORMATION(40 CFR 122.21(j)(1)and(2))
o Outfalls to Waters of the State of North Carolina
c 2.1 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
rn
d 0 Yes ❑ No 4 SKIP to Section 3.
0
= 2.2 Provide the treatment works'current average daily volume of inflow Average Daily Volume of Inflow and Infiltration
0
and infiltration. 02 gpd
�,
Indicate the steps the facility is taking to minimize inflow and infiltration.
Reported volume based on maximum daily flows.Manholes are inspected regularly to detect flow variations and suspect
areas are inspected with CCTV with repairs scheduled accordingly.
w
2.3 Have you attached a topographic map to this application that contains all the required information?(See instructions for
specific requirements.)
a) al
0
o ElYes ❑ No
2.4 Have you attached a process flow diagram or schematic to this application that contains all the required information?
c (See instructions for specific requirements.)
o El Yes ❑ No
2.5 Are improvements to the facility scheduled?
❑ Yes ❑ No 4 SKIP to Section 3.
Brieflylist and describe the scheduled improvements.
= P
0
1.
_
j n 2.
c
y 3.
r
U)
4.
2.6 Provide scheduled or actual dates of completion for improvements.
E Scheduled or Actual Dates of Completion for Improvements
Affected Attainment of
d Scheduled Begin End Begin
Outfalls Operational
2 Improvement Construction Construction Discharge
a (list outfall Level
(from above) number) (MM/DD/YYYY) (MM/DD/YYYY) (MM/DD/YYYY) (MM/DD/YYYY)
d i
1.
-0
.0 2.
(.0
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
NC0064378 Willowbrook Subdivision WWTP Modified March 2021
SECTION 3.INFORMATION ON EFFLUENT DISCHARGES(40 CFR 122.210)(3)to(5))
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
County Wake
City or town Clayton
0
a Distance from shore 0 ft. ft. ft.
a
Depth below surface 0 ft. ft. ft.
Average daily flow rate .014 mgd mgd mgd
Latitude 35' 4a 51.5?' N
Longitude 78° 29' 57.9r W
3.2 Do any of the outfalls described under Item 3.1 have seasonal or periodic discharges?
o ❑ Yes El No 4 SKIP to Item 3.4.
3.3 If so,provide the following information for each applicable outfall.
Outfall Number Outfall Number Outfall Number
o I
Number of times per year
0 discharge occurs
a Average duration of each
discharge(specify units)
cAverage flow of each mgd mgd mgd
discharge
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 diffuser type at each applicable outfall.
o.
Outfall Number Outfall Number Outfall Number
7
us 3.6 Does the treatment works discharge or plan to discharge wastewater to waters of the State of North Carolina from
one or more discharge points?
w ❑✓ Yes ❑ No 4SKIP to Section 6.
Page 6

NPDES Permit Number Facility Name Modified Application Form 2A
NC0064378 Willowbrook Subdivision 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 Unnamed tributary to Beddint
Name of watershed,river, Neuse River Basin
c or stream system
a. U.S.Soil Conservation
Service 14-digit watershed 030202011103
CD code
Name of state Neuse
management/river basin
.5; U.S.Geological Survey
8-digit hydrologic 03020201
re cataloging unit code
Critical low flow(acute) cfs cfs cfs
Critical low flow(chronic) cfs cfs 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 o01 Outfall Number Outfall Number
Highest Level of 0 Primary 0 Primary 0 Primary
Treatment(check all that 0 Equivalent to 0 Equivalent to ❑ Equivalent to
apply per outfall) secondary secondary secondary
0 Secondary 0 Secondary 0 Secondary
0 Advanced 0 Advanced 0 Advanced
0 Other(specify) ❑ Other(specify) ❑ Other(specify)
c
0
a j Design Removal Rates by
Outfall
H
d
BOD5 or CBOD5 85 %
d
m TSS 85 %
0 Not applicable ❑Not applicable ❑Not applicable
Phosphorus
0 Not applicable ❑Not applicable ❑Not applicable
Nitrogen o
/o
Other(specify) 0 Not applicable ❑Not applicable 0 Not applicable
Page 7

NPDES Permit Number FacilityName Modified Application Form 2A
NC0064378 Willowbrook Subdivision 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.
UV-primary disinfection
Chlorination/Dichlorination as emergency backup
� c
i c
c Outfall Number 001 Outfall Number Outfall Number
o
Disinfection type UV with C12 backup
y
N
Seasons used All
E
ro
Dechlorination used? ❑ Not applicable ❑ Not applicable ❑ Not applicable
El 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?
El Yes ❑ No
3.11 Have you conducted any WET tests during the 4.5 years prior to the date 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 receiving water near the discharge points.
Outfall Number Outfall Number Outfall Number
Acute Chronic Acute Chronic Acute Chronic
rn
Number of tests of discharge
water
Number of tests of receiving
water
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?
0 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?
2 Yes ❑ No additional sampling required by NPDES
permitting authority.
Page 8

NPDES Permit Number Facility Name Modified Application Form 2A
NC0064378 Willowbrook Subdivision 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 ❑ No 4 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?
El Yes ❑ No 4 Provide results in Table E and SKIP to
Item 3.26.
3.21 Indicate the dates the data were submitted to your NPDES permitting authority and provide a summary of the results.
Date(s)Submitted Summary of Results
(MM/DD/YYYY)
-o
c
c
0
R 3.22 Regardless of how you provided your WET testing data to the NPDES permitting authority,did any of the tests result in
o toxicity?
❑ Yes ❑ No 4 SKIP to Item 3.26.
d 3.23 Describe the cause(s)of the toxicity:
c
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?
El Yes El Not applicable because previously submitted
information to the NPDES Iermittin authori .
Page 9

NPDES Permit Number Facility Name Modified Application Form 2A
NC0064378 Willowbrook Subdivision WWTP Modified March 2021
SECTION 6.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
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
Section 1:Basic Application
Information for All Applicants ❑ w/variance request(s) ❑ w/additional attachments
Section 2:Additional El wl topographic map w/process flow diagram
Information ❑ w/additional attachments
❑� w/Table A ❑r w/Table D
El Section 3:Information on ✓❑ w/Table B ❑ w/additional attachments
m Effluent Discharges
❑ w/Table C
Section 4:Not Applicable
0
Section 5:Not Applicable
d
U
❑ Section 6:Checklist and
w/attachments
•, Certification Statement
Y 6.2 Certification Statement
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 fine
and imprisonment for knowing violations.
Name(print or type first and last name) Official title
Dana Hill Director of Operations
Signature Date signed
Qa.+r+P•e b.o.0.
Dana Hill Lao.your 4grogiccallon here
oa �s urrn,O 07,19,2022
Foxe ne.PDF Editor ,>.�y..�dW
Page 10

NPDES Permit Number Facility Name Outfall Number Modified Application Form 2A
NC0064378 Willowbrook Subdivision WWTP 001 Modified March 2021
TABLE A.EFFLUENT PARAMETERS FOR ALL POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant
Value Units Value Units Number of Method' (include units)
Samples
Biochemical oxygen demand
o BOD5 or CBOD5 17 mg/I 3.9 mg/I 52 SM5210 B-2011 29/15 mg/ ML
❑
❑MDL
(report one)
Fecal coliform 2419 /100 ml 1.8 /100 ml 52 Colilert 18 400/100 rr ❑ML
E MDL
Design flow rate .03 MGD .014 MGD 365
pH(minimum) 6.4 SU
pH(maximum) 7 SU
Temperature(winter) 17 degrees C 12 degrees C 60
Temperature(summer) 26 degrees C 23 degrees C 60
0 ML
Total suspended solids(TSS) 19 mg/I 4.8 mg/I 52 SM2540 D-2015 45 mg/I l MDL
1 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).
Page 11

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Modified Application Form 2A
NC0064378 Willowbrook Subdivision WWTP 001 Modified March 2021
TABLE B.EFFLUENT PARAMETERS FOR ALL POTWS WITH A FLOW EQUAL TO OR GREATER THAN 0.1 MGD
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method' (include
Value Units Value Units Samples units)
ID ML
Ammonia(as N) 20 mg/I 1.77 mg/I 52 EPa 350.1 35 mg/I E MDL
Chlorine ❑ML
(total residual,TRC)2 N/A N/A N/A N/A N/A 17 ug/I E MDL
Dissolved oxygen 10.6 mg/I 8.1 mg/I 52 SM4500 0 G-2016 >5 mg/I E MDL
0 ML
Nitrate/nitrite 8.88 mg/I 3.09 mg/I 52 EPA 353.2 MR 0 MDL
0 ML
Kjeldahl nitrogen 8.53 mg/I 3.94 mg/I 52 EPA351.2 MR ❑MDL
0 ML
Oil and grease N/A N/A N/A N/A N/A N/A ❑MDL
0 ML
Phosphorus 5.95 mg/I 3.7 mg/I 24 EPA 365.4 MR 0 MDL
Total dissolved solids N/A N/A N/A N/A N/A N/A ❑ML
0 MDL
1 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 I

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Water Service implied,about the accuracy of this data. Date:8/22/2022