NC0083321_Renewal (Application)_20220401

M,wY ,3
ROY COOPER g
Governor
ELIZABETH S.BISER �`• .nn
Secretary
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
April 04, 2022
Onslow Water and Sewer Authority
Attn: David M. Hohr, Chief Operations Officer
228 Georgetown Rd
Jacksonville, NC 28540
Subject: Permit Renewal
Application No. NC0083321
Hubert WTP
Onslow County
Dear Applicant:
The Water Quality Permitting Section acknowledges the April 1, 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_guidancIenvironmental-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,
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
D E Q ' N DfEnvironmental Quality vonResources
WilmingtonorthCarolina Regional Oepartmentffice o I27En Cardinalironment Drive ExtensionDi isi Wil ofmington.Water North Carolina 28405
910 796.7215

ONWASA
March 30, 2022
NCDEQ — Division of Water Resources
Water Quality Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
RECEIVED
Re: NPDES Permit Renewal APR 01 2022
Hubert Water Treatment Plant, Onslow County
Permit No. NC0083321
NCDEQIDWRINPDES
NPDES Permitting Staff,
Please find enclosed a completed EPA Forms 3510-1 and 2A, along with supporting
documentation, which shall serve as our request for renewal of the existing NPDES permit for the
above-referenced facility.
I apologize for the delay in getting this submitted for consideration; as with many other
water and wastewater utilities, it has been a challenge to conduct even the most routine activities
in light of the challenges of the pandemic and its associated restrictions on staff and operations.
If you have any questions or need additional information please feel free to contact me
directly at 910-937-7521 or dmohr(c�onwasa.com.
Sincerely,
David M. Mohr, P.E.
Chief Operations Officer
Onslow Water and Sewer Authority
C: Seth Brown, Treatment Facilities Administrator
James Arnold, ORC
228 Georgetown Road• Jacksonville,NC 28540•Tel [phone]•Fax [phone]•www.onwasa.com

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
Form U.S.Environmental Protection Agency
1 V./EPA Application for NPDES Permit to Discharge Wastewater
NPDES GENERAL INFORMATION
SECTION 1.ACTIVITIES REQUIRING AN NPDES PERMIT(40 CFR 122.21(f)and(f)(1))
1.1 Applicants Not Required to Submit Form 1
Is the facility a new or existing publicly owned Is the facility a new or existing treatment works
1.1.1 treatment works? 1.1.2 treating domestic sewage?
If yes,STOP. Do NOT complete D No If yes, STOP. Do NOT ❑✓ No
Form 1.Complete Form 2A. complete Form 1. Complete
Form 2S.
1.2 Applicants Required to Submit Form 1
1.2.1 Is the facility a concentrated animal feeding 1.2.2 Is the facility an existing manufacturing,
operation or a concentrated aquatic animal commercial, mining,or silvicultural facility that is
a production facility? currently discharging process wastewater?
Yes 4 Complete Form 1 0✓ No ❑ Yes 4 Complete Form 1 No
a and Form 2B. 1 and Form 2C.
1.2.3 Is the facility a new manufacturing,commercial, 1.2.4 Is the facility a new or existing manufacturing,
mining,or silvicultural facility that has not yet commercial, mining,or silvicultural facility that
commenced to discharge? discharges only nonprocess wastewater?
c ❑ Yes 4 Complete Form 1 ❑✓ No Yes 4 Complete Form No
and Form 2D. 1 and Form 2E.
N
1.2.5 Is the facility a new or existing facility whose
'— discharge is composed entirely of stormwater
associated with industrial activity or whose
discharge is composed of both stormwater and
non-stormwater?
❑ Yes 4 Complete Form 1 No
and Form 2F
unless exempted by
40 CFR
122.26(b)(14)(x)or
b 15 .
SECTION 2.NAME,MAILING ADDRESS,AND LOCATION(40 CFR 122.21(f)(2))
2.1 Facility Name
Hubert Water Treatment Plant
O 2.2 EPA Identification Number
v
O 110024286217
2.3 Facility Contact
Name(first and last) Title Phone number
v James Arnold WTP Supervisor/ORC [phone]
Email address
[e-mail]
2.4 Facility Mailing Address
Street or P.O. box
228 Georgetown Road
City or town State ZIP code
Jacksonville North Carolina 28540
EPA Form 3510-1(revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040 0004
d 2.5 Facility Location
Street,route number,or other specific identifier
< U 372 Hubert Boulevard
rn
c o County name County code(if known)
Onslow
o
cu Cityor town State ZIP code
E
Hubert North Carolina 28539
SECTION 3.SIC AND NAICS CODES(40 CFR 122.21(f)(3))
3.1 SIC Code(s) Description(optional)
4941 Water Supply
co
d
0
O
U
N
3.2 NAICS Code(s) Description(optional)
221310 Water Supply and Irrigation Systems
U
SECTION 4.OPERATOR INFORMATION(40 CFR 122.21(f)(4))
4.1 Name of Operator
Onslow Water and Sewer Authority(ONWASA)
0 4.2 Is the name you listed in Item 4.1 also the owner?
8 0 ❑✓ Yes ❑ No
4.3 Operator Status
El Public—federal ❑ Public—state ❑✓ Other public(specify)W&S Authority
0
❑ Private ❑ Other(specify)
4.4 Phone Number of Operator
[phone]
4.5 Operator Address
Street or P.O.Box
228 Georgetown Road
o z
•E City or town State ZIP code
o Jacksonville North Carolina 28540
is U
Email address of operator
[e-mail]
SECTIOA 5.INDIAN LAND(40 CFR 122.21(f)(5))
c 5.1 Is the facility located on Indian Land?
_ c
❑ Yes ❑✓ No
EPA Form 3510-1(revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
SECTION 6.EXISTING ENVIRONMENTAL PERMITS(40 CFR 122.21(f)(6))
6.1 Existing Environmental Permits(check all that apply and print or type the corresponding permit number for each)
m NPDES(discharges to surface ❑ RCRA(hazardous wastes) ❑ UIC(underground injection of
o w water) fluids)
•- NC0083321
a ❑ PSD(air emissions) ❑ Nonattainment program(CM) ElNESHAPs(CM)
rn
w ❑ Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section 404) 0 Other(specify)
SECTION 7.MAP(40 CFR 122.21(f)(7))
7.1 Have you attached a topographic map containing all required information to this application?(See instructions for
R specific requirements.)
❑✓ Yes ❑ No ❑ CAFO—Not Applicable(See requirements in Form 2B.)
SECTION 8.NATURE OF BUSINESS(40 CFR 122.21(f)(8))
8.1 Describe the nature of your business.
Potable water treatment plant with a discharge of backwash wastewater from greensand and carbon filtration,and
reject wastewater from ion exchange softening units. This plant currently has a design flow rate of 6.0 MGD and an
annual average discharge of approximately 0.216 MGD.
Discharge from said treatment works is through a total of four(4)0.75 MGD lined sedimentation lagoons,with clear
o supernatant pumped to Queen Creek(Stream Segment 19-41-16), (HUC:030203010301)within
p p p g in subbasin 03-05-01
the White Oak River Basin.
SECTION 9.COOLING WATER INTAKE STRUCTURES(40 CFR 122.21(f)(9))
9.1 Does your facility use cooling water?
a-
❑ Yes ❑✓ No 4 SKIP to Item 10.1.
is 9.2 Identify the source of cooling water.(Note that facilities that use a cooling water intake structure as described at
w 40 CFR 125,Subparts I and J may have additional application requirements at 40 CFR 122.21(r).Consult with your
0 Y NPDES permitting authority to determine what specific information needs to be submitted and when.)
U N/A
SECTION 10.VARIANCE REQUESTS(40 CFR 122.21(f)(10))
10.1 Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(m)?(Check all that
apply.Consult with your NPDES permitting authority to determine what information needs to be submitted and
when.)
0 ❑ Fundamentally different factors(CWA ❑ Water quality related effluent limitations(CWA Section
Section 301(n)) 302(b)(2))
❑ Non-conventional pollutants(CWA ❑ Thermal discharges(CWA Section 316(a))
Section 301(c)and(g))
❑✓ Not applicable
EPA Form 3510-1(revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
SECTION 11.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
11.1 In Column 1 below, mark the sections of Form 1 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:Activities Requiring an NPDES Permit ❑ w/attachments
❑✓ Section 2: Name, Mailing Address,and Location ❑ w/attachments
❑✓ Section 3: SIC Codes ❑ w/attachments
❑✓ Section 4: Operator Information ❑ w/attachments
❑ Section 5: Indian Land ❑ w/attachments
❑✓ Section 6: Existing Environmental Permits ❑ w/attachments
❑✓ Section 7: Map ❑ w/topographic ❑ w/additional attachments
map
o ❑✓ Section 8: Nature of Business ❑✓ w/attachments
❑ Section 9:Cooling Water Intake Structures ❑ w/attachments
❑ Section 10:Variance Requests ❑ w/attachments
❑✓ Section 11:Checklist and Certification Statement ❑ w/attachments
11.2 Certification Statement
U
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 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
David M.Mohr,PE Chief Operations Officer,ONWASA
Signature Date signed
' I 03/28/2022
EPA Form 3510-1(revised 3-19) Page 4

NPDES PERMIT NUMBER NC0083321
HUBERT WATER TREATMENT PLANT
ADDITIONAL ATTACHMENTS
• Topographic Map
• WTP Process Information
• Settling Lagoons Information
• Lagoon Solids Handling Plan

' DocuSign Envelope ID:4DF30F2D-9C40-41F2-9SEB-700EF500361D
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Hubert WTP -„-1., _,--r j`'-ik, =�''\
NPDES P ,-,�,,,,r r- -/ ; ;`ir:
ermit N00083321 A �? _Li' �7 ;��_::�`t 1
Facility Location L' O;-�' '•�I_ J/
Receiving Stream:Queen Creek Stream Class:SA; HOW stale not shown � ��,
Stream Segment: 19-41-16 Sub-Basin#:03-05-01 "/
River Basin:White Oak HUC:030203010301 SCALE USGS Quad:Hubert
County:Onslow 1:24,000 34.71250° -77.22278°

Hubert WTP Water treatment Process
r� Aerators Avg
372 Hubert BLVD Greensand Filters
1233 GPM each Avg now Per filter Approximately 350 GPM
Hubert NC, 28539 Filter Pumps Train 1
IN1PDES #NC008 321 3O
Det #3 _ Q0
___, _._ - I<MNO4lnjected Train
- - at Detention tanks
----{
Flow AVG Raw Water in O
4 — 0 0 00..._. j.
3850 GPM Z Det # 2 v Train 3
Detention tanks -CD i®. 13 .__-*
O
Ion Exchange Softeners Backwash Waste to lagoons
Approximated Avg 15000gal waste
train Softeners 1-2 AVG flow 440 GPM per backwash process per train.
after filter Train 1 Soft. Bypass AVG 250 GPM —
0
7
rair;2 Softener Bypass Chemical —� — i:z r_t�'.
after FilC �°' Treated Flow I
`>, 3 4 J+ I% ' AVG Total Injection vault
v ' 1 F Finished Water High Service Pumps
rain 3 H S (fluoride) ® i
titter f,14 ;';� co
V 3700 GPM 2, PO4 (orthophosphate) t�Clearvvells HSPs
4 3. CL2 (Sodium hypochlorite)- 411,0
' ' 1 to
Softeners 3-8 Avg 300 GPM
: System
Trains 2-3 Soft. Bypass Avg 350gpm
Softener Regeneration 1200 Gal, of Saturated Brine is
Process waste to lagoon, applied per Softener
Approx 18000 Gai per regeneration.
Regen
Pant Floor Drains and Storm Drains
Floor Drains flowing to Lagoon:
Chemical Feed (�To Waste Lagoon
Lab/Office Floor & Lab Sink There are Four
Bathroom Floor 24" x 24" Storm
I-IFS room floor Drains Located
CL2 and CL2 storage Room Floor inside the plant. ice,To Retention Pond Behind Plant
Blower Rm Floor
CL2 feed Rim Floor
T,ain Bay Floor Drains Please note that this schematic is a general representation of the
r Hubert WTP process only and is NOT depicting orientation or scale of
•
the different components within or around the WTP facility.

rimmimilimm%
•
Lagoon1 Lagoon 42 -. ' ,f Lagoon# 3
primary Secondary Tertiary 1 Lagoon #4
c rr9
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i' f
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lillitIM.111,..1 .1111111.11.111"
Influent .� ( Alternate Influent
`ems
f'\
L
urrent floor drain discharge
location, IMMEMIIIMENNI
372 Hubert Blvd. Hubert NC 28539
NPDES # NC0083321 .
-Each lagoon holds 0.75 MG
-There is no chemical addition. \ I'P
-Max influent flow is 1300 GPM as a batch
feed.
-Effluent vault has an 80gpm &a 350gpm
pump.
n There are three alternate influent points

Solids Handling Plan
Hubert Water Treatment Plant
A pump and haul method of removing solids from the four (4) lagoons at Hubert
WTP will be utilized. Solids will be dewatered to pass the paint test and
transported by truck to the Onslow County Landfill. The lagoons will be pumped
every three (3) years so as not to allow solids accumulation to interfere with
detention time.

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
Form U.S.Environmental Protection Agency
2A ��EPA Application for NPDES Permit to Discharge Wastewater
NPDES NEW AND EXISTING PUBLICLY OWNED TREATMENT WORKS
SECTION 1.BASIC APPLICATION INFORMATION FOR ALL APPLICANTS(40 CFR 122.21(j)(1)and(9))
1.1 Facility name
Hubert Water Treatment Plant
Mailing address(street or P.O.box)
228 Georgetown Road
City or town State ZIP code
o Jacksonville North Carolina 28540
Contact name(first and last) Title Phone number Email address
w James Arnold WTP Supervisor/ORC [phone] [e-mail]
Location address(street,route number,or other specific identifier) ❑ Same as mailing address
372 Hubert Boulevard
L
City or town State ZIP code
Hubert North Carolina 28539
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
Onslow Water and Sewer Authority
Applicant address(street or P.O.box)
0
228 Georgetown Road
€ City or town State ' ZIP code
Jacksonville North Carolina 28540
Contact name(first and last) Title Phone number Email address
c David Mohr Chief Operations Officer [phone] [e-mail]
1.4 Is the applicant the facility's owner,operator,or both?(Check only one response.)
❑ Owner ❑ Operator ❑✓ Both
1.5 To which entity should the NPDES permitting authority send correspondence?(Check only one response.)
Facility and applicant
❑ Facility ❑✓ 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
✓❑ NPDES(discharges to surface ❑ RCRA(hazardous waste) ❑ UIC(underground injection
water) control)
E NC0083321
o ❑ PSD(air emissions) ❑ Nonattainment program(CM) ❑ NESHAPs(CM)
rn
H ❑ Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section ❑ Other(specify)
404)
P Form -E A 3510-2A(Revised 3 19) Page 1

i
EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
1.7 Provide the collection system information requested below for the treatment works.
Municipality Population Collection System Type
Served Served (indicate percentage) Ownership Status
%separate sanitary sewer 0 Own 0 Maintain
cu N/A-WTP %combined storm and sanitary sewer 0 Own 0 Maintain
o 0 Unknown 0 Own 0 Maintain
c %separate sanitary sewer 0 Own 0 Maintain
.171 %combined storm and sanitary sewer 0 Own ❑ Maintain
0 Unknown ❑ Own ❑ Maintain
a %separate sanitary sewer ❑ Own ❑ Maintain
- %combined storm and sanitary sewer ❑ Own 0 Maintain
EElUnknown ❑ Own 0 Maintain
0 %separate sanitary sewer ❑ Own ❑ Maintain
co %combined storm and sanitary sewer 0 Own ❑ Maintain
c El Unknown 0 Own 0 Maintain
Total
°' Population
o Served
Separate Sanitary Sewer System Combined Storm and
Sanitary Sewer
Total percentage of each type of
sewer line(in miles)
�' 1.8 Is the treatment works located in Indian Country?
C
o 0 Yes 0 No
U
R 1.9 Does the facility discharge to a receiving water that flows through Indian Country?
c 0 Yes ❑✓ No
1.10 Provide design and actual flow rates in the designated spaces. Design Flow Rate
0.518 mgd
= y Annual Average Flow Rates(Actual)
a R Two Years Ago Last Year This Year
C
CO Co 0.237 mgd 0.219 mgd 0.216 mgd
Maximum Daily Flow Rates(Actual)
o Two Years Ago Last Year This Year
0.604 mgd 0.539 mgd 0.431 mgd
0, 1.11 Provide the total number of effluent discharge points to waters of the United States by type.
o Total Number of Effluent Discharge Points by Type
a co Constructed
4) F Combined Sewer
c .a Treated Effluent Untreated Effluent Overflows Bypasses Emergency
Overflows C
(l)
0 o 1 o 0 o
EPA Form 3510-2A(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
Outfalls Other Than to Waters of the United States
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 United States?
❑ 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
N/A ❑ Continuous
gpd ❑ Intermittent
❑ Continuous
gpd ❑ Intermittent
❑ Continuous
gpd ❑ Intermittent
a
1.14 Is wastewater applied to land?
2 ❑ Yes ❑✓ No-+ SKIP to Item 1.16.
c 1.15 Provide the land application site and discharge data requested below.
y Land Application Site and Discharge Data
Continuous or
0 Location Size Average Daily Volume Intermittent
Applied (check one)
-c N/A acres d 0 Continuous
gp ❑ Intermittent
0
acresgpd 0 Continuous
0 ❑ Intermittent
acresgpd ❑ Continuous
❑ Intermittent
R 1.16 Is effluent transported to another facility for treatment prior to discharge?
❑ Yes m No 4 SKIP to Item 1.21.
1.17 Describe the means by which the effluent is transported(e.g.,tank truck,pipe).
N/A
1.18 Is the effluent transported by a party other than the applicant?
❑ Yes ElNo 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)
N/A
City or town State ZIP code
Contact name(first and last) Title
Phone number Email address
EPA Form 3510-2A(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
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
Facility name Mailing address(street or P.O.box)
N/A
C)
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
0 Average daily flow rate mgd
CO
o 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 United States(e.g.,underground percolation,underground injection)?
413
L ❑ Yes ❑✓ No 4 SKIP to Item 1.23.
0
0 1.22 Provide information in the table below on these other disposal methods.
Information on Other Disposal Methods
o Disposal Location of Size of Annual Average Continuous or Intermittent
Method Disposal Site Disposal Site Daily Discharge (check one)
Description Volume
co
713
N/A acres gpd ❑ Continuous
0 Intermittent
❑ Continuous
acres gpd ❑ Intermittent
acresgpd ❑ 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.)
❑ 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 ElNo+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 Contractor 2 Contractor 3
c Contractor name N/A
(company name)
Mailing address
(street or P.O.box)
City,state,and ZIP
code
0 Contact name(first and
c� last)
Phone number
Email address
Operational and
maintenance
responsibilities of
contractor
EPA Form 3510-2A(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
SECTION 2.ADDITIONAL INFORMATION(40 CFR 122.21(j)(1)and(2))
Outfalls to Waters of the United States
LT
2.1 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
rn
o ❑✓ 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
and infiltration.
0 gpd
w
Indicate the steps the facility is taking to minimize inflow and infiltration.
Not applicable-Discharge is from a water treatment facility and not subject to I&I..
0
0
t 2.3 Have you attached a topographic map to this application that contains all the required information?(See instructions for
m specific requirements.)
a)
o
ro ❑✓ Yes ❑ No
E 2.4 Have you attached a process flow diagram or schematic to this application that contains all the required information?
3 E (See instructions for specific requirements.)
o a,
LT
o ❑✓ Yes ❑ No
2.5 Are improvements to the facility scheduled?
❑✓ Yes ❑ No 4 SKIP to Section 3.
= Briefly list and describe the scheduled improvements.
0
1.Accumulated sludge to be removed from Settling Lagoon#1 in early 2023,in accordance with Solids Handling Plan.
c
E
2.---
E
0 0
3.
CD
w
d
4.
cn
-a
gi 2.6 Provide scheduled or actual dates of completion for improvements.
Scheduled or Actual Dates of Completion for Improvements
Affected Attainment of
d Scheduled Begin End Begin
> Outfalls Operational
2 Improvement Construction Construction Discharge p
(from above) (list outfall (MM/DD/YYYY) (MM/DD/YYYY) (MM/DD/YYYY) Level
number) (MM/DD/YYYY)
1. 001 01/01/2023 03/01/2023 03/01/2023 03/01/2023
co2.
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:
Contractor will be responsible for obtaining necessary permits/approvals prior to the start of work.
EPA Form 3510-2A(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
SECTION 3.INFORMATION ON EFFLUENT DISCHARGES(40 CFR 122.21(j)(3)to(5))
3.1 Provide the following information for each outfall.(Attach additional sheets if you have more than three outfalls.)
Outfall Number Do1 Outfall Number Outfall Number
State North Carolina
County Onslow
co
Y
0 City or town Hubert
"6 - -
`o_ Distance from shore 0 ft. ft. ft.
.Q
d Depth below surface o ft. ft. ft.
0
Average daily flow rate 0.216 mgd mgd mgd
Latitude 34° 42' 45" N ° " °
Longitude 77° 13' 22" 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.
d
cb
3.3 If so,provide the following information for each applicable outfall.
r
y Outfall Number 001 Outfall Number Outfall Number
0
o Number of times per year
o discharge occurs 365 days
a Average duration of each 18 hours/day
o discharge(specify units)
cAverage flow of each 0.216 mgd mgd mgd
R discharge
h Months in which discharge Every month
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.
4, 3.5 Briefly describe the diffuser pe at each applicable outfall.
a
1- Outfall Number Outfall Number Outfall Number
u)
= N/A
0
c vi 3 6 Does the treatment works discharge or plan to discharge wastewater to waters of the United States from one or more
d discharge points?
co
g r ❑✓ Yes ❑ No 4SKIP to Section 6.
EPA Form 3510-2A(Revised 3-19) Page 6

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
3.7 Provide the receiving water and related information(if known)for each outfall.
Outfall Number 001 1 Outfall Number Outfall Number
Receiving water name Queen Creek
Name of watershed,river,
c or stream system White Oak
Q- U.S.Soil Conservation
V.
d Service 14-digit watershed HUC:030203010301
o code
15 Name of state
management/river basin White Oak River Basin
a) .
U.S.Geological Survey
8-digit hydrologic 03020301
ce 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 001 Outfall Number Outfall Number
Highest Level of ❑ Primary ❑ Primary ❑ Primary
Treatment(check all that ❑ Equivalent to 0 Equivalent to ❑ Equivalent to
apply per outfall) secondary secondary secondary
❑ Secondary 0 Secondary 0 Secondary
❑ Advanced 0 Advanced 0 Advanced
O Other(specify) 0 Other(specify) 0 Other(specify)
c Settling only.
0_ Design Removal Rates by N/A
0 Outfall
W -
N
CI
BOD5 or CBOD5 N/A %
d
E
d TSS N/A % % %
I-
0 Not applicable ❑Not applicable 0 Not applicable
Phosphorus % % %
0 Not applicable ❑Not applicable ❑Not applicable
Nitrogen /o o 0/o %
/o
Other(specify) ❑Not applicable ❑ Not applicable ❑Not applicable
%
EPA Form 3510-2A(Revised 3-19) Page 7

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
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.
None-WTP discharge.
G
C
O
U
Outfall Number 001 Outfall Number Outfall Number
.2- Disinfection type N/A
ca
Seasons used N/A
cal
Dechlorination used? ❑✓ Not applicable ❑ Not applicable ❑ Not applicable
❑ Yes D Yes ❑ Yes
❑ No ❑ No ❑ No
3.10 Have you completed monitoring for all Table A parameters and attached the results to the application package?
✓❑ 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 001 Outfall Number Outfall Number
Acute Chronic Acute Chronic Acute Chronic
Number of tests of discharge
water 11 0
Number of tests of receiving
water o 0
3.13 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
❑✓ Yes ❑ No 4 SKIP to Item 3.16.
0 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?
co
❑ 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
3.16 Does one or more of the following conditions apply?
• The facility has a design flow greater than or equal to 1 mgd.
• The POTW has an approved pretreatment program or is required to develop such a program.
• The NPDES permitting authority has informed the POTW that it must sample for the parameters in Table C,must
sample other additional parameters(Table D),or submit the results of WET tests for acute or chronic toxicity for
each of its discharge outfalls(Table E).
❑✓ Yes 4 Complete Tables C,D,and E as ❑ No 4 SKIP to Section 4.
applicable.
3.17 Have you completed monitoring for all applicable Table C pollutants and attached the results to this application
package?
❑✓ Yes ❑ No
3.18 Have you completed monitoring for all applicable Table D pollutants required by your NPDES permitting authority and
attached the results to this application package?
❑✓ Yes ❑ No additional sampling required by NPDES
permitting authority.
EPA Form 3510-2A(Revised 3-19) Page 8

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
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 ❑ 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 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)
04/14/2021(March Report)-Passed;07/26/2021(June Report)-Passed;
-a04/14/2021 10/27/2021(September Report)-Failed;11/22/2021(October Report)-
Failed;12/15/2021(November Report)-Failed;01/31/2022(December
Report)-Passed;02/25/2022(January Report)-Failed;03/28/2022
(February Report)-Failed.
A 3.22 Regardless of how you provided your WET testing data to the NPDES permitting authority,did any of the tests result in
toxicity?
❑✓ Yes ❑ No 4 SKIP to Item 3.26.
0 3.23 Describe the cause(s)of the toxicity:
Unknown at the present time;currently conducting a detailed analysis of duplicate test samples subsequent to a failure
result,along with performing additional intermediate WET and detailed water quality tests to identify the toxic
w agent/agents.See 3.25.
3.24 Has the treatment works conducted a toxicity reduction evaluation?
O Yes ❑ No 4 SKIP to Item 3.26.
3.25 Provide details of any toxicity reduction evaluations conducted.
ONWASA is under contract with a regional engineering firm(WK Dickson)and a laboratory/testing sub-consultant
(Shealy Consulting,LLC)to conduct effluent sampling and analysis to determine the specific constituent responsible for
the toxicity test failures and recommendations on how to address it.In addition to the monthly testing now required
under the permit,additional(weekly)water quality testing has been implemented.
3.26 Have you completed Table E for all applicable outfalls and attached the results to the application package?
El Yes Not applicable because previously submitted
information to the NPDES •ermittin• authori .
SECTION 4.INDUSTRIAL DISCHARGES AND HAZARDOUS WASTES(40 CFR 122.21(j)(6)and(7))
4.1 Does the POTW receive discharges from SIUs or NSCIUs?
❑ Yes ❑✓ No 4 SKIP to Item 4.7.
w 4.2 Indicate the number of SIUs and NSCIUs that discharge to the POTW.
o Number of SIUs Number of NSCIUs
3 N/A
R 4.3 Does the POTW have an approved pretreatment program?
_ ❑ Yes ❑✓ No
-0
A 4.4 Have you submitted either of the following to the NPDES permitting authority that contains information substantially
us
identical to that required in Table F:(1)a pretreatment program annual report submitted within one year of the
cn
al
application or(2)a pretreatment program?
❑ Yes ❑✓ No 4 SKIP to Item 4.6.
o 4.5 Identify the title and date of the annual report or pretreatment program referenced in Item 4.4.SKIP to Item 4.7.
N/A
4.6 Have you completed and attached Table F to this application package?
❑ Yes ❑✓ No
EPA Form 3510-2A(Revised 3-19) Page 9

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
4.7 Does the POTW receive,or has it been notified that it will receive,by truck,rail,or dedicated pipe,any wastes that are
regulated as RCRA hazardous wastes pursuant to 40 CFR 261?
❑ Yes ❑✓ No 4 SKIP to Item 4.9.
4.8 If yes,provide the following information:
Annual
Hazardous Waste Waste Transport Method Amount of Units
Number (check all that apply) Waste
Received
N/A ❑ Truck ❑ Rail
❑ Dedicated pipe ❑ Other(specify)
0
❑ Truck ❑ Rail
❑ Dedicated pipe ❑ Other(specify)
0
12
❑ Truck ❑ Rail
_ ❑ Dedicated pipe ❑ Other(specify)
r, 4.9 Does the POTW receive,or has it been notified that it will receive,wastewaters that originate from remedial activities,
0 including those undertaken pursuant to CERCLA and Sections 3004(7)or 3008(h)of RCRA?
❑ Yes ❑✓ No 4 SKIP to Section 5.
4.10 Does the POTW receive(or expect to receive)less than 15 kilograms per month of non-acute hazardous wastes as
specified in 40 CFR 261.30(d)and 261.33(e)?
❑ Yes 4 SKIP to Section 5. ❑ No
4.11 Have you reported the following information in an attachment to this application:identification and description of the
site(s)or facility(ies)at which the wastewater originates;the identities of the wastewater's hazardous constituents;and
the extent of treatment,if any,the wastewater receives or will receive before entering the POTW?
❑ Yes ❑ No
SECTION 5.COMBINED SEWER OVERFLOWS(40 CFR 122.21(j)(8))
5.1 Does the treatment works have a combined sewer system?
❑ Yes ❑✓ No-*SKIP to Section 6.
-0 5.2 Have you attached a CSO system map to this application?(See instructions for map requirements.)
a ElYes ElNo
5.3 Have you attached a CSO system diagram to this application?(See instructions for diagram requirements.)
`J' ❑ Yes ❑ No
U
EPA Form 3510-2A(Revised 3-19) Page 10

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
5.4 For each CSO outfall,provide the following information.(Attach additional sheets as necessary.)
CSO Outfall Number CSO Outfall Number CSO Outfall Number
City or town N/A
0
w
•i State and ZIP code
0
0
o County
Ma
o Latitude °
0
co Longitude ° " " "
U
Distance from shore ft. ft. ft.
Depth below surface ft. ft. ft.
5.5 Did the POTW monitor any of the following items in the past year for its CSO outfalls?
CSO Outfall Number CSO Outfall Number CSO Outfall Number
Rainfall ❑ Yes 0 No ❑ Yes ❑ No ❑ Yes 0 No
rn
c
0 CSO flow volume El Yes ❑ No ❑ Yes ❑ No ❑ Yes ❑ No
c
CSO pollutant ❑ Yes ❑ No ❑ Yes ❑ No 0 Yes Cl No
o concentrations
co
o Receiving water quality ❑ Yes 0 No ❑ Yes ❑ No ❑ Yes 0 No
CSO frequency ❑ Yes ❑ No ❑ Yes ❑ No ❑ Yes ❑ No
Number of storm events ❑ Yes ❑ No ❑ Yes ❑ No Cl Yes ❑ No
5.6 Provide the following information for each of your CSO outfalls.
CSO Outfall Number CSO Outfall Number CSO Outfall Number
} Number of CSO events in events events events
h the past year
co
n.
c Average duration per hours hours hours
a event ❑Actual or❑ Estimated ❑Actual or❑Estimated ❑Actual or❑Estimated
Li' million gallons million gallons million gallons
o Average volume per event
o ❑Actual or❑Estimated ❑Actual or❑Estimated ❑Actual or❑Estimated
Minimum rainfall causing inches of rainfall inches of rainfall inches of rainfall
a CSO event in last year ❑Actual or❑ Estimated ❑Actual or 0 Estimated 0 Actual or❑Estimated
EPA Form 3510-2A(Revised 3-19) Page 11

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
5.7 Provide the information in the table below for each of your CSO outfalls.
CSO Outfall Number CSO Outfall Number CSO Outfall Number
Receiving water name N/A
Name of watershed/
stream system
U.S.Soil Conservation ❑Unknown ❑ Unknown 0 Unknown
Service 14-digit
watershed code
'> (if known)
Name of state
cc management/river basin
U.S.Geological Survey 0 Unknown 0 Unknown 0 Unknown
8-Digit Hydrologic Unit
Code(if known)
Description of known
water quality impacts on
receiving stream by CSO
(see instructions for
exam.les
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 ❑ wl variance request(s) ❑ wl additional attachments
❑ 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/Table E
Effluent Discharges
cu
� ❑ w/Table C ❑ w/additional attachments
Section 4:Industrial ❑ w/SIU and NSCIU attachments ❑ w/Table F
0 Discharges and Hazardous
Wastes ❑ w/additional attachments
Section 5:Combined Sewer ❑ w/CSO map ❑ w/additional attachments
Overflows
❑ w/CSO system diagram
-a Section 6:Checklist and
U)
El Certification Statement ❑ w/attachments
Y 6.2 Certification Statement
V
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. lam 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
"DA., ,a M. Mom.. pE cu, oP -77a1Js
Signature Date signed
03/30/ZOZZ.
/(1(e ( ---/
EPA Form 3510-2A(Revised 3-19) Page 12
1

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP 001 OMB No.2040-0004
TABLE A.EFFLUENT PARAMETERS FOR ALL POTWS
141,011111111111111111
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of
Value Units Value Units Method1 (include units)
Sam I les
Biochemical oxygen demand
❑BOD5 or 0 CBOD5 N/A ❑ML
0 MDL
resort one
Fecal coliform N/A ❑ML
0 MDL
Design flow rate no limit MGD no limit MGD 2/month ilir
pH(minimum) 6.8 s.u.
pH(maximum) 8.5 s.u.
Temperature(winter) N/A
i
Temperature(summer) N/A
Total suspended solids(TSS) 15 mg/I 10 mg/I 2/month Permit requirement ---
❑ML
❑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).
EPA Form 3510-2A(Revised 3-19) Page 13

This page intentionally left blank.
/44 �9

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP 001 OMB No.2040-0004
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
Value Units Value Units Samples Method' (include units)
Ammonia(as N) N/A ❑ML
❑MDL
Chlorine ❑ML
(total residual,TRC)2 13.0 Fy g/I 2/month Permit requirement
0 MDL
Dissolved oxygen no limit mg/I 2/month Permit requirement ❑ML
❑MDL
Nitrate/nitrite no limit mg/I Quarterly Permit requirement ❑ML
❑MDL
Kjeldahl nitrogen no limit mg/I Quarterly Permit requirement ❑ML
❑MDL
Oil and grease N/A ❑ML
0 MDL
❑ML
Phosphorus no limit mg/I Quarterly Permit requirement 0 MDL
Total dissolved solids no limit mg/I Monthly Permit requirement ❑ML
❑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 15

This page intentionally left blank.
Pia,G )

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
TABLE C.EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant
Value Units Value Units Number of Method1 (include units)
Samples
Metals,Cyanide,and Total Phenols
❑ML
Hardness(as CaCO3) 0 MDL
Antimony,total recoverable ❑ML
❑MDL
Arsenic,total recoverable ❑ML
❑MDL
Beryllium,total recoverable ❑ML
❑MDL
Cadmium,total recoverable ❑ML
❑MDL
Chromium,total recoverable ❑ML
❑MDL
0 ML
Copper,total recoverable 2.90 N g/I 1.85 N g/I Permit requirement 0 MDL
0 ML
Lead,total recoverable 110.40 Pg/I 4.25 N g/I Permit requirement 0 MDL
Mercury,total recoverable ❑ML
❑MDL
Nickel,total recoverable ❑ML
❑MDL
Selenium,total recoverable ID ML
❑MDL
Silver,total recoverable ❑ML
❑MDL
Thallium,total recoverable ❑ML
0 MDL
Zinc,total recoverable 47.6 Ail 42.8 Ng/1 Permit requirement ❑ML
❑MDL
Cyanide ❑ML
❑MDL
Total phenolic compounds ❑ML
❑MDL
Volatile Organic Compounds
Acrolein ❑ML
❑MDL
Acrylonitrile ❑ML
❑MDL
Benzene 0 ML
❑MDL
Bromoform ❑ML
❑MDL
EPA Form 3510-2A(Revised 3-19) Page 17

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
TABLE C. EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method' (include units)
Value Units Value Units Samples
Carbon tetrachloride ❑ML
❑MDL
Chlorobenzene ❑ML
❑MDL
Chlorodibromomethane ❑ML
❑MDL
Chloroethane ❑ML
❑MDL
2-chloroethylvinyl ether ❑ML
❑MDL
Chloroform ❑ML
❑MDL
Dichlorobromomethane ❑ML
❑MDL
1,1-dichloroethane ❑ML
❑MDL
1,2-dichloroethane ❑ML
❑MDL
trans-1,2-dichloroethylene ❑ML
❑MDL
1,1-dichloroethylene ❑ML
❑MDL
1,2-dichloropropane ❑ML
❑MDL
1,3-dichloropropylene ❑ML
❑MDL
Ethylbenzene ❑ML
❑MDL
Methyl bromide ❑ML
❑MDL
0 ML
Methyl chloride ❑MDL
Methylene chloride ❑ML
❑MDL
1,1,2,2-tetrachloroethane ❑ML
❑MDL
Tetrachloroethylene ❑ML
❑MDL
Toluene ❑ML
❑MDL
1,1,1-trichloroethane ❑ML
❑MDL
1,1,2-trichloroethane 0 ML
❑MDL
EPA Form 3510-2A(Revised 3-19) Page 18

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004 •
TABLE C.EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method' (include units)
Value Units Value Units Samples
ML
Trichloroethylene ❑MDL
❑ML
Vinyl chloride ❑MDL
Acid-Extractable Compounds
p-chloro-m-cresol ❑ML
❑MDL
2-chlorophenol ❑ML
❑MDL
2,4-dichlorophenol ❑ML
❑MDL
2,4-dimethylphenol ❑ML
❑MDL
4,6-dinitro-o-cresol ❑ML
❑MDL
2,4-dinitrophenol ❑ML
❑MDL
2-nitrophenol ❑ML
❑MDL
0 ML
4-nitrophenol ❑MDL
0 ML
Pentachlorophenol ❑MDL
Phenol ❑ML
❑MDL
2,4,6-trichlorophenol ❑ML
❑MDL
Base-Neutral Compounds
0 ML
Acenaphthene ❑MDL _
Acenaphthylene ❑ML
❑MDL
Anthracene ❑ML
❑MDL
Benzidine ❑ML
❑MDL
0 ML
Benzo(a)anthracene ❑MDL
0 ML
Benzo(a)pyrene ❑MDL
3,4-benzofluoranthene 0 ML
❑MDL
EPA Form 3510-2A(Revised 3-19) Page 19

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
TABLE C. EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant
Value Units Value Units Number of Methods (include units)
Samples
Benzo(ghi)perylene ❑ML
❑MDL
0 ML
Benzo(k)fluoranthene ❑MDL
0 ML
Bis(2-chloroethoxy)methane ❑MDL
Bis(2-chloroethyl)ether ❑ML
❑MDL
Bis(2-chloroisopropyl)ether ❑ML
❑MDL
Bis(2-ethylhexyl)phthalate ❑ML
❑MDL
0 ML
4-bromophenyl phenyl ether 0 MDL
Butyl benzyl phthalate ❑ML
❑MDL
2-chloronaphthalene ❑ML
❑MDL
4-chlorophenyl phenyl ether ❑ML
❑MDL
Chrysene ❑ML
❑MDL
0 ML
di-n-butyl phthalate 0 MDL
di-n-octyl phthalate ❑ML
❑MDL
Dibenzo(a,h)anthracene ❑ML
❑MDL
1,2-dichlorobenzene ❑ML
❑MDL
1,3-dichlorobenzene ❑ML
❑MDL
1,4-dichlorobenzene ❑ML
❑MDL
3,3-dichlorobenzidine ❑ML
❑MDL
0 ML
Diethyl phthalate 0 MDL .
0 ML
Dimethyl phthalate ❑MDL
2,4-dinitrotoluene ❑ML
❑MDL
2,6-dinitrotoluene 0 ML
❑MDL
EPA Form 3510-2A(Revised 3-19) Page 20

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP OMB No.2040-0004
TABLE C.EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method"' (include units)
Value Units Value Units Samples
1,2-diphenylhydrazine o ML
❑MDL
Fluoranthene 0 ML
o MDL
Fluorene 0 ML
o MDL
Hexachlorobenzene ❑ML
o MDL
Hexachlorobutadiene 0 ML
❑MDL
Hexachlorocyclo-pentadiene ❑ML
❑MDL
Hexachloroethane ❑ML
o MDL
Indeno(1,2,3-cd)pyrene ❑ML
❑MDL
Isophorone ❑ML
❑MDL
Naphthalene ❑ML
❑MDL
Nitrobenzene ❑ML
o MDL
N-nitrosodi-n-propylamine ❑ML
0 MDL
N-nitrosodimethylamine ❑ML
❑MDL
N-nitrosodiphenylamine ❑ML
0 MDL
Phenanthrene ❑ML
o MDL
Pyrene ❑ML
❑MDL
1,2,4-trichlorobenzene ❑ML
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 N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2A(Revised 3-19) Page 21

•
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PAGE Z

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
110024286217 NC0083321 Hubert WTP 001 OMB No.2040-0004
TABLE D.ADDITIONAL POLLUTANTS AS REQUIRED BY NPDES PERMITTING AUTHORITY
Maximum Daily Discharge Average Daily Dischar e
Pollutant Analytical ML or MDL
list Value Units Value Units Number of Method
(list)
Samples (include units)
❑ No additional sampling is required by NPDES permitting authority.
Salinity-Composite no limit ppth Monthly Permit requirement ❑ML
❑MDL
Salinity-Grab no limit ppth Monthly Permit requirment ❑ML
❑MDL
❑ML
Conductivity-Composite no limit umhos/cm Monthly Permit requirement ❑MDL
❑ML
Conductivity-Grab no limit umhos/cm Monthly Permit requirement ❑MDL
Turbidity no limit NTU Monthly Permit requirement ❑ML
0 MDL
Total Chloride no limit mg/I Monthly Permit requirement ❑ML
0 MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑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).
EPA Form 3510-2A(Revised 3-19) Page 23

NPDES PERMIT NUMBER NC0083321
HUBERT WATER TREATMENT PLANT
ADDITIONAL ATTACHMENTS
• Topographic Map
• WTP Process Information
• Settling Lagoons Information
• Lagoon Solids Handling Plan

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Onslow Water and Sewer Authority N
Hubert WTP \
NPDES Permit NC0083321 1 )
r ±tyL
Facility Location
Receiving Stream:Queen Creek Stream Class:SA; HQW scale not shown
Stream Segment: 19-41-16 Sub-Basin#:03-05-01
River Basin:White Oak HUC:030203010301 SCALE USGS Quad:Hubert
County:Onslow 1:24,000 34.71250°,-77.22278°

Hubert WTP Water treatment Process
Aerators Avg
372 Hubert BLVD Greensand Filters
1233 GPM each Avg Flow Per filter Approximately 350 GPM
Hubert NC, 28539 Filter Pumps Train 1
NPDES #NC0083321 _____ 30[ Det #3I 1 y 000 0 I.KMNO4 Injected
' - I Train 2
Raw Water in ` at Detention tanks 000 ©
Flow AVG 201 Det # 2 ,r y _
-I Train 3
3850 GPM '0000---C>
Detention tanks
a4 10 11 1z
1 or Det #1 » Backwash Waste to lagoons
Ion Exchange Softeners
Approximated Avg 15000gal waste
Crain' Softeners 1-2 AVG flow 440 GPM per backwash process per train.
ktGer flit �� Train 1 Soft.Bypass AVG 250 GPM
rain 2 Softener Bypass, +� Chemical
ttterFllt�c,} 3 4 , `e' Treated Flow Injection vault
Ilk—
L AVG Total High Service Pumps
'rain 3
Finished Water
1. HFS (fluoride)
cfter fltgrl> , O 0 3700 GPM 2. PO4 (orthophosphate) to Clearwells HSPs
0' 3. CL2 (Sodium hypochlorite)I > ® 1-4 to —
Softeners 3-8 Avg 300 GPM ® System
Trains 2-3 Soft, Bypass Avg 350gpm _
Softener Regeneration 1200 Gal.of Saturated Brine is
Process waste to lagoon, applied per Softener
4pprox 18000 Gal per regeneration.
egen
Plant Floor Drains and Storm Drains
Floor Drains flowing to Lagoon: (�To Waste Lagoon
Chemical Feed I✓/
Lab/Office Floor & Lab Sink There are Four
Bathroom Floor 24" x 24" Storm
HFS room floor Drains Located
CL2 and CL2 storage Room Floor inside the plant. To Retention Pond Behind Plant
Blower Rm Floor
CL2 feed Rm Floor
,gain Bay Floor Drains Please note that this schematic is a general representation of the
` Hubert WTP process only and is NOT depicting orientation or scale of
the different components within or around the WTP facility.

Discharge to stream,
`> Lagoon ft1 Lagoon 42 Li.'' Lagoon #3
c7
Primary Secondary Tertiary Lagoon #4
:FL
r. - [7
I >
Influent r' Alternate Influent
L
-�r
Current floor drain discharge
location.
372 Hubert Blvd. Hubert NC 28539
NPDES # NC0083321
-Each lagoon holds 0.75 MG
-There is no chemical addition. \TP
-Max influent flow is 1300 GPM as a batch
feed.
-Effluent vault has an 80gpm & a 350gpm
pump.
0 There are three alternate influent points

Solids Handling Plan
Hubert Water Treatment Plant
A pump and haul method of removing solids from the four (4) lagoons at Hubert
WTP will be utilized. Solids will be dewatered to pass the paint test and
transported by truck to the Onslow County Landfill. The lagoons will be pumped
every three (3) years so as not to allow solids accumulation to interfere with
detention time.