NC0051322_application_20220825

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
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. NCO051322
Ashley Hills WWTP
Wake County
Dear Applicant:
NORTH CAROLINA
Environmental Quality
August 25, 2022
Laserfiehe
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. 15OB-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:
htt s: d .nc. ov ermits-re ulations ermit- uidance environmental -a lication-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.
cc: Brent Milliron-CWSNC
ec: WQPS Laserfiche File w/application
Sincerely
Wren e o d
Administrative Assistant
Water Quality Permitting Section
North Carolina Department ofEnvlronmentai Quality I Division of Water Resources
•%� Raleigh Regional Office 13800 Sarre" Drive I Raleigh, North Carolina 27609
919.7%4200

NPDES Permit Number
Facility Name
Modified Application Form 2A
NCO051322
Ashley Hills WWTP
Modified March 2021
Form
NC Department of Environmental Quality - Application for NPDES Permit to Discharge Wastewater
MINOR SEWAGE FACILITIES (Before completing this form, please read
the instructions. Failure to follow
NPDES
the instructions May result in denial of the application.
SECTION•
INFORMATION •• r
1.1
Facility name
Ashley Hills WWTP
Mailing address (street or P.O. box)
PO Box 240908
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
Location address (street, route number, or other specific identifier) ❑ Same as mailing
address
320 Woods Run
City or town State
ZIP code
Knightdale NC
27545
1.2
Is this application for a facility that has yet to commence discharge?
Lase
❑ Yes + See instructions on data submission ❑ No
rfiic
requirements for new dischargers.
1.3
Is applicant different from entity listed under Item 1.1 above?
0 Yes ❑ No 4 SKIP to Item 1.4.
Applicant name
Carolina Water Service Inc. of North Carolina
c
Applicant address (street or P.O. box)
7a
PO Box 240908
aCity
or town
State
ZIP code
Charlotte
NC
28224
Contact name (first and last)
Title
Phone number
Email address
aDana
Hill
Director of Operations
[phone]
dana.hill@carolinawaterservic
a
1.4
Is the applicant the facility's owner, operator, or both? (Check only one response.)
❑r Owner ❑ Operator ❑
Both
1.5
To which entity should the NPDES permitting authority send correspondence? (Check only one response.)
❑ 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
mwater)
✓❑ NPDES (discharges to surface
❑ RCRA (hazardous waste)
❑
UIC (underground injection
control)
£
e
NCO051322
❑ PSD (air emissions)
❑ Nonattainment program (CAA)
❑
NESHAPs (CAA)
e
W
co
a
❑ Ocean dumping (MPRSA) ❑ Dredge or fill (CWA Section
404)
❑
Other (specify)
Page 1

NPDES Permit Number Facility Name Modified Application Form 2A
NCO051322 Ashley Hills WWTP Modified March 2021
1.7 Provide the collections stem information requested below for the treatment works.
Municipality I Population Collection System Type Ownership Status
Served_ Served indicatepercentage)
100 % separate sanitary sewer ❑ Own ❑ Maintain
cone
% combined storm and sanitary rY sewer
❑
Own
❑
Maintain
m
�2930 Dooulation
❑
Unknown
❑
Own
❑
Maintain
% separate sanitary sewer
❑
Own
❑
Maintain
o
% combined storm and sanitary sewer
❑
Own
❑
Maintain
❑
Unknown
❑
Own
❑
Maintain
c.
0
% separate sanitary sewer
❑
Own
❑
Maintain
% combined storm and sanitary sewer
❑
Own
❑
Maintain
iO
❑
Unknown
❑
Own
❑
Maintain
% separate sanitary sewer
❑
Own
❑
Maintain
N%
combined storm and sanitary sewer
❑
Own
❑
Maintain
c
❑
Unknown
❑
Own
❑
Maintain
o
Total
2930
Population
0
Served
Separate Sanitary Sewer System
Total percentage of each type of
100 %
sewer line in miles
1.8
Is the treatment works located in Indian Country?
c
0
❑ Yes El No
v
1.9
Does the facility discharge to a receiving water that Flows through Indian Country?
c
❑ Yes El No
1.10
Provide design and actual flow rates in the designated spaces.
a
Annual Average Flow Rates Actual
Two Year Ago
Last Year
= C
.171 mgd
203 mgd
m"
Maximum Daily Flow Rates Actual
Two Year Ago
Last Year
.397 mgd
.221 mgd
1.11
Provide the total number of effluent discharge points to waters of the State of North Caroli
c
Total Number of Effluent Discharge ointsbyType
IL Q,
LM .,
Treated Effluent
Untreated Effluent
Combined Sewer
Bypasses
Overflows
G
1 �
Combined Storm and
Flow Rate
.250 mgd
This Year
.152 mgd
This Year
217 mgd
ape.
Constructed
Emergency
Overflows
Page 2

'ES Permit Number I Facility Name Modified Application Form 2A
NCO051322 Ashley Hills W WTP Modified March 2021
Outfaiis 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
gpd
❑
Continuous
❑
Intermittent
1.14
Is wastewater applied to land?
:E
❑ Yes ❑✓ No 4 SKIP to Item 1.16.
0
1.15
Provide the land application site and discharge data requested below.
C
Land Application Site and Discharge Data
Average Daily Volume
Continuous or
o,
Location
Size
Applied
Intermittent
check one
t
acres
gpd
❑ Continuous
c
❑ Intermittent
acres
gpd
❑ Continuous
❑ Intermittent
acres
d
gpd
❑ Continuous
❑ Intermittent
1.16
Is effluent transported to another facility for treatment prior to discharge?
❑ Yes ❑✓ No 4 SKIP to Item 1.21.
0
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

NPDES Permit Number Facility Name Modified Application Form 2A
NCO051322 Ashley Hills WWTP Modified March 2021
1.20 1 In the table below, indicate the name, address, contact information, NPDES number, and average daily flow rate of the
Receiving Facliq Data
m
Facility name
Mailing address (street or P.O. box)
3
City or town
State
ZIP code
0
c�
o
Contact name (first and last)
Title
0
s
m
Phone number
Email address
UNPDES
number of receiving facility (if any) ❑ None Average daily flow rate mgd
W
c
1
1.21
Is the wastewater disposed of in a manner other than those already mentioned in Items 1.14 through 1.21 that do
0
not have outlets to waters of the State of North Carolina (e.g., underground percolation, underground injection)?
LM
❑ Yes 0 No + SKIP to Item 1.23.
o
1.22
Provide information in the table below on these other disposal methods.
m
Information on Other
—
Dis osal Methods
s
Disposal
Location of
Size of
Annual Average
Continuous or Intermittent
Method
Disposal Si
Site
Disposal Site
Daily Discharge
(check one)
Description
Volume
❑ Continuous
acres
gpd ❑ Intermittent
acres
gpd
❑ Continuous
❑ Intermittent
acres
gpd
ElContinuous
❑ 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.)
b
❑ 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 0 No +SKIP to Section 2.
1.25
Provide location and contact information for each contractor in addition to a description of the contractor's operational
and maintenance responsibilities.
Contractor Information
Contractor 1
I Contractor 2
Contractor 3
0
Contractor name
A
(company name
oMailing
address
c
street or P.O. box
City, state, and ZIP
o
code
name (first and
cContact
U
last)
Phone number
Email address
Operational and
maintenance
responsibilities of
contractor
Page 4

NPDES Permit Number Facility Name Modified Application Form 2A
NCO051322 Ashley Hills WWTP Modified March 2021
SECTIONDD• •' • 1
c Outfalls 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?
w
0
0 Yes ❑ No 4 SKIP to Section 3.
c
2.2
Provide the treatment works' current average daily volume of inflow
Average Deify Volume of Inflow and Infiltration
50,000 d
9P
and infiltration.
c
Indicate the steps the facility is taking to minimize inflow and infiltration.
VManholes
are inspected regularly to detect flow changes with suspect areas inspected by CCTV and repairs made
3
accordingly. Several sections of main have been rehabbed in previous years.
0
C
c
r
2.3
Have you attached a topographic map to this application that contains all the required information? (See instructions for
� a
specific requirements.)
o
❑✓ Yes ❑ No
�o
2.4
Have you attached a process flow diagram or schematic to this application that contains all the required information?
(See instructions for specific requirements.)
_o c
o
❑✓ Yes ❑ No
2.5
Are improvements to the facility scheduled?
❑ Yes 0 No 4 SKIP to Section 3.
Briefly list and describe the scheduled improvements.
0
1.
c
m
E
A?
2.
E
46
3.
„
m
n
4.
v
2.6
Provide scheduled or actual dates of completion for improvements.
Scheduled or Actual Dates of Completion for Improvements
m
Scheduled
Affected
Begin
End Begin
Attainment of
a
o
Q.
Improvement
Outfalls
(list outfall
Construction
Construction Discharge
Operational
Level
E
(from above)
number)
(MM/DD/YYY`)
(MM/DD/YYYY) (MM/DD/YYYY)
MM/DD
m
m
2.
- —
r
co
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
NCO051322 I Ashley Hills WWTP I Modified March 2021
3.1 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
w
City or town Knightdale
0
e
Distance from shore 0 ft. ft.
z
Depth below surface 0 ft. ft.
0
Average daily flow rate •150 mgd mgd
Latitude 35' 48 9.29' N ° '
Longitude 78° 2Y 10.8"' W "
3.2 Do any of the outfalls described under Item 3.1 have seasonal or periodic discharges?
o ❑ Yes 0 No 4 SKIP to Item 3.4.
m
12 3.3 If so, provide the following information for each applicable outfall.
L
Outfall Number
Outfall Number
Outfall Number
c
Number of times per year
discharge occurs
n Average duration of each
`o dischar e (specify units
Average flow of each
mgd
mgd
mgd
discharge
Months in which discharge
occurs
3.4 IAre any of the outfalls listed under Item 3.1 equipped with a diffuser?
❑ Yes ❑r No 4 SKIP to Item 3.6.
3.5 Brieflv describe the diffuser tvoe at each aDplicable outfall.
m
Outfall Number
Outfall Number
Outfall Number
vS 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?
3 0 Yes ❑ No 4SKIP to Section 6.
Page 6

NPDES Permit Number Facility Name
NCO051322 Ashley Hills WWTP
3.7 Provide the receiving water and related information if known for each outfall.
Outfall Number 001 1 Outfall Number
Modified Application Form 2A
Modified March 2021
Outfall Number
Receiving water name Poplar Creek
Name of watershed, river, Neuse River Basin
or stream system
U.S. Soil Conservation
Service 14-digit watershed 030202011103
code
Name of state
Neuse
management/river basin
U.S. Geological Survey
8-digit hydrologic 03020201
cataloging unit code
Critical low flow (acute) cis
cfs
Critical low flow (chronic) cfs
cfs
Total hardness at critical mg/L of
mg/L of
low flow CaCO3
CaCO3
3.8 1 Provide the following information describing the treatment provided for discharges from each outfall.
cfs
cfs
mg/L of
CaCO3
Outfall Number 001
Outfall 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
0
Secondary
❑
Secondary
❑
Secondary
❑
Advanced
❑
Advanced
❑
Advanced
❑
Other (specify)
❑
Other (specify)
❑
Other (specify)
Design Removal Rates by
Outfall
BOD5 or CBOD5
85
%
%
%
TSS
85
%
%
%
® Not applicable
❑ Not applicable
❑ Not applicable
Phosphorus
o
�o
0 %
%
® Not applicable
❑ Not applicable
❑ Not applicable
Nitrogen
%
%
%
Other (specify)
❑ Not applicable
❑ Not applicable
❑ Not applicable
J
%
%
%
Page 7

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e
e
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W
3.9
NPDES Permit Number Facility Name Modified Application Form 2A
NCO051322 Ashley Hills WWTP Modified March 2021
Describe the type of disinfection used for the effluent from each outfall in the table below. If disinfection varies by
season, describe below.
UV Disinfection
Outfall Number 001 Outfall Number Outfall Number
Disinfection type I UV
Seasons used
All
Dechlorination used? ❑ Not applicable ❑ Not applicable ❑ Not applicable j
❑ 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?
E] 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 0 No -* 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.
O IWI Number Outfall Number Outfall Number
Acute Chronic Acute Chronic Acute Chronic
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?
❑ Yes 0 No additional sampling required by NPDES
permitting authority.
Page 8

NPDES Permit Number
Facility Name
Modified Application Form 2A
NCO051322
Ashley Hills 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?
❑ Yes 0 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?
❑ Yes ❑ No 3 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.
Date(s) Submitted
Summary of Results
(MMIDDIYYYY)
m
3
C
i+
C
O
V
.q
3.22
Regardless of how you provided your WET testing data to the NPDES permitting authority, did any of the tests result in
c
toxicity?
❑ Yes ❑ No 4 SKIP to Item 3,26,
2
3.23
Describe the cause(s) of the toxicity:
c
m
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 ID Not applicable because previously submitted
information to the NPDES Dermittinq authorit
Page 9

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NPDES Permit Number Facility Name Modified Application Form 2A
NCO051322 I Ashley Hills WWTP Modified March 2021
6.1 1In 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 aoDlicants are reauired to Drovide attachments.
Column 1
Column 2
ID
Section 1: Basic Application
❑
w/ variance request(s)
❑
w/ additional attachments
Information for All A licants
❑
Section 2: Additional
✓❑
w/topographic map
❑
w/ process flow diagram
Information
❑
w/ additional attachments
❑✓
wl Table A
❑
w/ Table D
❑
Section 3: Information on
✓❑
w/ Table B
❑
w/ additional attachments
Effluent Discharges
❑
wl Table C
Section 4: Not Applicable
Section 5: Not Applicable
0 Section 6: Checklist and w/ attachments
Certification Statement
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 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
forgathering 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
DidmN:y.e M oo, Ha
Dana Hill ON C U5,04Y5NC GN=OwcHIA,E d eM1i@er Yu wa rvmmm 07/19/2022
w.�N: i m m..,no.ar: aoam.t
tlm:ynwaigiNp lo®tlon Mn
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