NC0083321_Fact Sheet_20240222

NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO083321
Sydney Deuterman / Compliance & Expedited Permitting Unit / sydney.deutermankdeq.nc.gov / Nov 2023
FACILITY INFORMATION
Applicant/Facility Name
Onslow Water and Sewer Authority (ONWASA) / Attn: David
Mohr, Chief Operations Officer
Hubert Water Treatment Plant
Applicant Contact Email
dmohrkonwasa.com
Applicant Address
228 Georgetown Road, Jacksonville, NC 28540
Facility Physical Address
372 Hubert Boulevard, Hubert, NC 28539
Max, Monthly Avg Flow (MGD)
0.5108 MGD
Type of Waste
Backwash from greensand and reject from ion exchange
Facility Class
PC-1
County
Onslow
Permit Status
Renewal
Regional Office
I WiRO
STREAM CHARACTERISTICS
Receiving Stream
Queen Creek
Stream
Classification
SA; HQW
Stream Segment
19-41-16
Outfall Lat.
340 42' 45" N
7Q10 - Summer (cfs)
Tidal
Outfall Long.
770 13' 22.1" W
7Q10 - Winter (cfs)
Tidal
Drainage basin
White Oak
30Q2 (cfs)
Tidal
Subbasin
03-05-01
Average Flow (cfs)
Tidal
HUC
030203010301
IWC (%)
100%
303(d) List
Not Listed
FACILITY SUMMARY
Hubert WTP operates a greensand and ion exchange water treatment plant with a design potable flow rate
of 6.0 MGD and an estimated wastewater discharge of 0.5108 MGD (based on the maximum, monthly
average over the past three years). This plant pulls raw water from 14 water supply wells. The treatment
process for raw water consists of aeration, greensand filtration, and ion exchange softening. Backwash
water from the greensand and carbon filters, and reject water from the ion exchange softening units, is sent
to sedimentation lagoons where the solids are settled out and the clear supernatant is discharged. Floor
drains in the plant also flow to the sedimentation lagoons. Settled sludge that has accumulated in the
lagoons is pumped out and hauled away to a landfill.
The existing treatment components at the water treatment plant are the following:
• Three (3) aerators and detention tanks
• Three (3) trains of four (4) greensand filters each
• Three (3) trains with eight (8) ion exchange softeners
• Four (4) 0.75 MG lined sedimentation lagoons
• Effluent pumps
Chemical usage consists o£
• Potassium permanganate
• Fluoride
• Orthophosphate
• Sodium hypochlorite
• Household cleaners
Fact Sheet for Permit Renewal
Nov 2023 - NPDES Permit NCO083321 - Page 1

PERMIT HISTORY
The previous permit issued in 2020 included a Compliance Schedule for new metal limits, which required
the submission of a Corrective Action Plan and subsequent annual reports over the course of 5 years. A
review of the permit file shows that DWR never received a Corrective Action Plan from the permittee. As
the previous permit expired in 2022, this renewal will carry over the remainder of the Compliance Schedule
for Copper, Lead and Zinc limits. The limits for these three parameters will become effective July 1, 2025
(5 years from the issuance of the previous permit on July 1, 2020). This renewal will require the submission
of a Corrective Action Plan and follow-up report as the facility failed to submit one previously.
In addition, the previous permits issued in 2014 and 2020 included a requirement for a Discharge
Alternative Evaluation. A review of the permit file shows that DWR never received the results of an
evaluation from the permittee. See the section on WET testing below for additional details.
RENEWAL SUMMARY
This renewal contains the following changes:
• Updated the facility address.
• Updated the maximum monthly average discharge flow on the Supplement to Cover Sheet.
• Updated the regulatory citation for the facility grade in Section A. (1).
• Added Duration of Flow as an eDMR parameter to the effluent table in A. (1).
• Added a footnote to A. (1) requesting that monitoring data be reported down to the PQL.
• Added an effective date for Copper, Lead and Zinc limits to the effluent table in A. (1).
• Removed the Discharge Alternative Evaluation condition, to be replaced with a permit re -opener.
• Added Section A. (3) Permit Re -Opener — Whole Effluent Toxicity special condition due to the
facility's WET compliance history.
• Updated A. (4) Compliance Schedule for Copper, Lead and Zinc limits and monitoring
requirements.
• Updated Section A. (5) to reflect current federal requirements for Electronic Reporting of
Discharge Monitoring Reports.
COMPLIANCE HISTORY
Hubert WTP had two enforcements during the recent permit cycle, both for WET testing failures. The
facility has also had multiple NOVs for WET testing. See the section on WET testing below for additional
details. The most recent inspection (September 2020) showed the facility to be in compliance and noted that
the facility was working to determine the cause of aquatic toxicity.
NCG59 GENERAL PERMIT ELIGIBILITY
• Plant uses greensand and ion exchange treatment technologies - ineligible
• Conclusion: Ineligible for NCG59 General Permit.
WHOLE EFFLUENT TOXICITY (WET) TESTING
As this facility utilizes both greensand and ion exchange treatment technologies, the WET testing is
required in this permit as saltwater Acute, Pass/Fall Limit [TGE3E] on a Quarterly basis using Mysidopsis
Bahia at an effluent concentration of 90%.
This facility has an extended history of repeated WET testing failures. A requirement to complete a
Discharge Alternatives Evaluation was added in the 2014 permit and maintained in the 2020 permit as the
permittee failed to complete an evaluation. Instead, ONWASA contracted with an engineering firm (W.K.
Dickson & Company) and an analytical laboratory (Shealy Consulting, LLC) to conduct a Toxicity
Identification Evaluation (TIE) in June 2020. The study was terminated in November 2020 after samples
collected during the study were all resulting in a `Pass' and the cause of toxicity could not be identified.
The report recommended the removal of solids from the lagoons to allow longer water retention time in
the system and therefore better treatment. In November 2021, the consultants and lab were asked to
Fact Sheet for Permit Renewal
Nov 2023 - NPDES Permit NCO083321 - Page 2

resume the TIE after the facility failed toxicity tests in Sept, Oct, and Nov 2021. The TIE study was
completed in June 2022 and concluded that the cause of toxicity was high calcium concentrations.
In a remission request submitted in Sept 2022 for a failed toxicity test (TX-2022-0011), ONWASA
confirmed that, based on the results of the TIE study, excessive calcium concentrations were the likely
cause of the failures and stated that changes in plant operation were put into place. Starting in June 2022,
Hubert WTP were able to maintain compliance and passed five quarterly WET tests. However, the facility
recently had a failure for their September 2023 quarterly test and subsequently tested in October, which did
result in a `Pass'.
Based on the recent compliance since the results of the TIE study in June 2022, the Quarterly WET test
Pass/Fall Limit using Mysid shrimp will be maintained in the permit, however a re -opener condition is
being added to address any future compliance concerns.
REASONABLE POTENTIAL ANALYSIS
A reasonable potential analysis (RPA) was performed for a discharger going to a saltwater stream. A flow
(Qw) of 0.5108 MGD was used based on the maximum, monthly average flow between Oct 2020 and Sept
2023.
Based on this analysis, the following permitting actions are proposed for this permit:
• Copper — reasonable potential to exceed water quality standards; maintaining monthly monitoring
with limits
• Lead — reasonable potential to exceed water quality standards; maintaining monthly monitoring
with limits
• Zinc — reasonable potential to exceed water quality standards; maintaining monthly monitoring
with limits
COMMENTS ON DRAFT PERMIT
Fact Sheet for Permit Renewal
Nov 2023 - NPDES Permit NCO083321 - Page 3

NPDES Implementation of Instream Dissolved Metals Standards — Saltwater Standards
The NC 2007-2015 Water Quality Standard (WQS) Triennial Review was approved by the NC Environmental
Management Commission (EMC) on November 13, 2014. The US EPA subsequently approved the WQS revisions on
April 6, 2016, with some exceptions. Therefore, metals limits in draft permits out to public notice after April 6, 2016
must be calculated to protect the new standards - as approved.
Table 1. NC Dissolved Metals Water Quality Standards/Aquatic Life Protection
Parameter
Acute FW, µg/1
(Dissolved)
Chronic FW, µg/1
(Dissolved)
Acute SW, µg/1
(Dissolved)
Chronic SW, µg/1
(Dissolved)
Arsenic
340
150
69
36
Beryllium
65
6.5
---
---
Cadmium
Calculation
Calculation
40
8.8
Chromium III
Calculation
Calculation
---
---
Chromium VI
16
11
1100
50
Copper
Calculation
Calculation
4.8
3.1
Lead
Calculation
Calculation
210
8.1
Nickel
Calculation
Calculation
74
8.2
Silver
Calculation
0.06
1.9
0.1
Zinc
Calculation
Calculation
90
81
Table 1 Notes:
1. FW= Freshwater, SW= Saltwater
2. Calculation = Hardness dependent standard
3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life standards for
Mercury and selenium are still expressed as Total Recoverable Metals due to bioaccumulative concerns (as
are all human health standards for all metals). It is still necessary to evaluate total recoverable aquatic life and
human health standards listed in 15A NCAC 213.0200 (e.g., arsenic at 10 µg/l for human health protection;
cyanide at 5 µg/L and fluoride at 1.8 mg/L for aquatic life protection).
General Information on the Reasonable Potential Analysis (RPA)
The RPA process itself did not change as the result of the new metals standards. However, application of the dissolved
metal standards requires additional consideration in order to establish the numeric standard for each metal of concern
of each individual discharge. Note that none of the saltwater standards are hardness -dependent.
Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The discharge -
specific standards must be converted to the equivalent total values for use in the RPA calculations. We will generally
rely on conversion factors determined by EPA (more on that below), but it is also possible to consider case -specific
translators developed in accordance with established methodology.
RPA Permitting Guidance — Discharges to Saltwater (Tidal waters)
The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern, based on recent
effluent data, and calculate the allowable effluent concentrations, based on applicable standards and the stream
dilution. For discharges to saltwater, no allowance for dilution is given unless a dilution study, such as a CORMIX
model, is performed.
If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the discharge has
reasonable potential to exceed the standard, which warrants a permit limit in most cases. If monitoring for a particular
pollutant indicates that the pollutant is not present (i.e. consistently below detection level), then the Division may
remove the monitoring requirement in the reissued permit.
1. To perform a RPA using the saltwater dissolved metal standards, the Permit Writer compiles the following
information:
Fact Sheet for Permit Renewal
Nov 2023 - NPDES Permit NC0083321 - Page 4

• Permitted flow
• Receiving stream classification
• Instream Wastewater Concentration, if a dilution model has been performed
The RPA spreadsheet converts the dissolved numeric standard (SW standards listed in Table 1.) for each
metal of concern to a total recoverable metal, using the EPA conversion factors published in the June 1996
EPA Translator Guidance Document. This method presumes that the metal is dissolved to the same extent as
it was during EPA's criteria development for metals.
Conversion Factors for Dissolved Metals
Saltwater CIVIC
Saltwater CCC
Metal
(Acute)
(chronic)
Arsenic 1.000
1.000
Cadmium 0.994
0.994
Chromium VI 0.993
0.993
Copper 0.83
0.83
Lead 0.951
0.951
Mercury 0.85
0.85
Nickel 0.990
0.990
Selenium 0.998
0.998
Silver 0.85
—
Zinc 0.946
0.946
From: US EPA website, National Recommended Water Quality
Criteria - Aquatic Life Criteria Table
h!!ps://www.epa.gov/wgc/national-recommended-water-
gualijy -criteria- Muatic- life-criteri a -tab le#a
3. The dissolved numeric standard for each metal of concern is divided by the EPA conversion factor (or site -
specific translator) to obtain a Total Recoverable Metal at ambient conditions.
4. If a dilution study was performed on the receiving stream and an Instream Wastewater Concentration (1WC)
determined the RPA spreadsheet uses a mass balance equation to determine the total allowable concentration
(permit limits) for each pollutant using the following equation:
Ca = (s7Q10 + Qw) (Cwgs) — (s7010) (Cb)
Qw
Where: Ca = allowable effluent concentration (µg/L or mg/L)
Cwqs = NC Water Quality Standard or federal criteria (µg/L or mg/L)
Cb = background concentration: assume zero for all toxicants except N113* (µg/L or mg/L)
Qw = permitted effluent flow (cfs, match 7Q 10 units)
s7Q10 = summer, critical low flow (cfs)
* Discussions are on -going with EPA on how best to address background concentrations
Assuming no background concentration, this equation can be reduced to:
Ca = (s7Q 10 + Qw) (Cwgs)
Qw
Where: IWC = Qw or
Qw + s7Q10
or Ca = Cwgs
IWC
101
and D = modelled dilution factor (unitless)
Fact Sheet for Permit Renewal
Nov 2023 - NPDES Permit NCO083321 - Page 5

If no dilution study has been performed Ca, the allowable effluent concentration, is equal to the Total
Recoverable Metal determined at ambient conditions (ie. the dissolved numeric standard divided by the EPA
conversion factor (or site -specific translator) for the metal of concern). See item # 3 above.
The permit writer enters the most recent 2-3 years of effluent data for each pollutant of concern. Data entered
must have been taken within four and one-half years prior to the date of the permit application (40 CFR
122.21). The RPA spreadsheet estimates the 95th percentile upper concentration of each pollutant. The
Predicted Max concentrations are compared to the Total allowable concentrations to determine if a permit
limit is necessary. If the predicted max exceeds the acute or chronic Total allowable concentrations, the
discharge is considered to show reasonable potential to violate the water quality standard, and a permit limit
(Total allowable concentration) is included in the permit in accordance with the U.S. EPA Technical Support
Document for Water Quality -Based Toxics Control published in 1991.
6. When appropriate, permit writers develop facility specific compliance schedules in accordance with the EPA
Headquarters Memo dated May 10, 2007 from James Hanlon to Alexis Strauss on 40 CFR 122.47
Compliance Schedule Requirements.
7. The Total Chromium NC WQS was removed and replaced with a hexavalent chromium standard. Asa cost
savings measure, total chromium data results may be used as a conservative surrogate in cases where there are
no analytical results based on chromium VI. In these cases, the projected maximum concentration (95th %)
for total chromium will be compared against the water quality standard chromium VI.
Fact Sheet for Permit Renewal
Nov 2023 - NPDES Permit NCO083321 - Page 6

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REASONABLE POTENTIAL ANALYSIS - DATA
Copper
Values" then "COPY"
. Maximum data
points = 58
Date
Data
BDL=1/2DL
Results
1
6/4/2019
<
10
5
Std Dev.
1.5692
2
9/17/2019
<
10
5
Mean
1.1593
3
12/3/2019
<
10
5
C.V.
1.3536
4
3/3/2020
<
10
5
n
43
5
6/2/2020
<
10
5
6
8/3/2020
<
1
0.5
Mult Factor =
1.1600
7
9/15/2020
<
1.85
0.925
Max. Value
5.00 ug/L
8
10/7/2020
<
1
0.5
Max. Pred Cw
5.80 ug/L
9
11 /4/2020
<
2
1
10
12/8/2020
<
1
0.5
11
1 /6/2021
<
1
0.5
12
2/3/2021
<
1
0.5
13
3/2/2021
<
1.85
0.925
14
4/7/2021
<
1
0.5
15
5/6/2021
<
1
0.5
16
6/8/2021
<
1
0.5
17
7/7/2021
<
1
0.5
18
8/4/2021
<
1
0.5
19
9/2/2021
<
1
0.5
20
10/6/2021
<
1
0.5
21
11 /3/2021
<
1
0.5
22
12/7/2021
<
1
0.5
23
1 /5/2022
<
1
0.5
24
2/8/2022
<
1
0.5
25
3/8/2022
<
1
0.5
26
4/5/2022
<
1
0.5
27
5/3/2022
<
1
0.5
28
6/7/2022
<
10
5
29
7/6/2022
<
1
0.5
30
8/3/2022
<
1
0.5
31
9/13/2022
<
1
0.5
32
10/5/2022
<
1
0.5
33
11 /2/2022
<
1
0.5
34
12/6/2022
<
1
0.5
35
1 /4/2023
<
1
0.5
36
2/7/2023
<
1
0.5
37
3/7/2023
<
1
0.5
38
4/4/2023
<
1
0.5
39
5/2/2023
<
1
0.5
40
6/6/2023
<
1
0.5
41
7/5/2023
<
1
0.5
42
8/2/2023
<
1
0.5
43
9/12/2023
<
1
0.5
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Lead
Values" then "COPY"
. Maximum data
points = 58
Date
Data
BDL=1/2DL
Results
1
8/3/2020
<
1
0.5
Std Dev.
0.8307
2
9/15/2020
<
4.25
2.125
Mean
0.7434
3
10/7/2020
<
10
5
C.V.
1.1173
4
11 /4/2020
<
4
2
n
38
5
12/8/2020
<
1
0.5
6
1/6/2021
<
1
0.5
Mult Factor =
1.21
7
2/3/2021
<
1
0.5
Max. Value
5.00 ug/L
8
3/2/2021
<
4.25
2.125
Max. Pred Cw
6.05 ug/L
9
4/7/2021
<
1
0.5
10
5/6/2021
<
1
0.5
11
6/8/2021
<
1
0.5
12
7/7/2021
<
1
0.5
13
8/4/2021
<
1
0.5
14
9/2/2021
<
1
0.5
15
10/6/2021
<
1
0.5
16
11 /3/2021
<
1
0.5
17
12/7/2021
<
1
0.5
18
1 /5/2022
<
1
0.5
19
2/8/2022
<
1
0.5
20
3/8/2022
<
1
0.5
21
4/5/2022
<
1
0.5
22
5/3/2022
<
1
0.5
23
6/7/2022
<
1
0.5
24
7/6/2022
<
1
0.5
25
8/3/2022
<
1
0.5
26
9/13/2022
<
1
0.5
27
10/5/2022
<
1
0.5
28
11 /2/2022
<
1
0.5
29
12/6/2022
<
1
0.5
30
1 /4/2023
<
1
0.5
31
2/7/2023
<
1
0.5
32
3/7/2023
<
1
0.5
33
4/4/2023
<
1
0.5
34
5/2/2023
<
1
0.5
35
6/6/2023
<
1
0.5
36
7/5/2023
<
1
0.5
37
8/2/2023
<
1
0.5
38
9/12/2023
<
1
0.5
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
83321 SW RPA 2023,data
Date}

REASONABLE POTENTIAL ANALYSIS - DATA
Date
Data
BDL=1/2DL
Results
1
6/4/2019
22
22
Std Dev.
2
9/17/2019
23
23
Mean
3
12/3/2019
14
14
C.V.
4
3/3/2020
11
11
n
5
6/2/2020
11
11
6
8/3/2020
<
1
0.5
Mu It Factor =
7
9/15/2020
16
16
Max. Value
8
10/7/2020
<
1
0.5
Max. Pred Cw
9
11/4/2020
<
10
5
10
12/8/2020
<
10
5
11
1/6/2021
<
10
5
12
2/3/2021
<
10
5
13
3/2/2021
22
22
14
4/7/2021
<
10
5
15
5/6/2021
<
10
5
16
6/8/2021
<
10
5
17
7/7/2021
38.01
38.01
18
8/4/2021
<
10
5
19
9/2/2021
36
36
20
10/6/2021
<
10
5
21
11 /3/2021
14
14
22
12/7/2021
<
10
5
23
1/5/2022
<
5
2.5
24
2/8/2022
<
10
5
25
3/8/2022
<
10
5
26
4/5/2022
<
10
5
27
5/3/2022
<
10
5
28
6/7/2022
<
10
5
29
7/6/2022
<
10
5
30
8/3/2022
<
10
5
31
9/13/2022
<
10
5
32
10/5/2022
<
10
5
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11/2/2022
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34
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35
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36
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Values" then "COPY"
. Maximum data
points = 58
8.2549
8.3840
0.9846
43
1.1300
38.0 ug/L
43.0 ug/L
83321 SW RPA 2023,data
Date}

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From:
To:
Subject:
Date:
Deuterman, Svdnev
Tharrinaton. Tom
RE: Upcoming Permit Renewals - Drafting Initiated
Friday, November 17, 2023 4:30:00 PM
Thanks Tom! Looks like the CAP was never submitted then.
I also wanted your thoughts on their toxicity compliance. After getting the results of the TIE study in
June 2022, the facility passed the following 5 quarters until they had a failure this Sept. A follow-up
TOX test in Oct did result in a pass, however. The facility claims they've adjusted plant operation to
resolve the TOX issues. What are the region's thoughts on keeping or removing the condition
requiring them to do a Discharge Alternatives Evaluation (which they also never submitted)?
Sydney Deuterman (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-707-3712
svdneudeuterman(@ded.nc.,Qov
1617 Mail Service Center
Raleigh, NC 27699-1617
S
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Tharrington, Tom <[e-mail]>
Sent: Friday, November 17, 2023 9:32 AM
To: Deuterman, Sydney<[e-mail]>
Subject: RE: Upcoming Permit Renewals - Drafting Initiated
Here is our last inspection report, it was done by our engineer Bryan Lievre who was formally with
Public Water and is very familiar with WTP's. He did not mention anything related to metals other
than they had recently passed a metals analysis related to on -going toxicity.
From: Deuterman, Sydney <svdney.deutermanPdeq.nc.g_ov>
Sent: Thursday, November 16, 2023 4:59 PM
To: Tharrington, Tom <tom.tharringtonPdeq.nc.g_ov>
Subject: RE: Upcoming Permit Renewals - Drafting Initiated
Hi Tom,

I'm working on the renewal for Hubert WTP right now and could not locate a Corrective Action Plan
from ONWASA for the Copper, Lead and Zinc limits that were added in the previous permit. Do you
know if WiRO ever received anything?
Thanks,
Sydney Deuterman (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-707-3712
svdneudeutermanRdeq.nc.,gov
1617 Mail Service Center
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Tharrington, Tom <[e-mail].g_ov>
Sent: Wednesday, June 28, 2023 9:27 AM
To: Deuterman, Sydney <[e-mail].g_ov>
Cc: King, Morella s <morella.sanchez-kingna deq. nc.g_ov>
Subject: RE: Upcoming Permit Renewals - Drafting Initiated
Hey Sydney, let me do some research on Beulaville WWTP. As far as I'm aware the Hubert, Atlantic
Beach have no issues but I do want to look into the Pruitt site too
From: Deuterman, Sydney <svdney.deutermanPdeq.nc.g_ov>
Sent: Tuesday, June 27, 2023 5:03 PM
To: Tharrington, Tom <tom.tharringtonPdeq.nc.g_ov>
Cc: King, Morella s <morella.sanchez-kingna deq.nc.g_ov>
Subject: Upcoming Permit Renewals - Drafting Initiated
Hi Tom,
I just wanted to reach out and let you know that I'm working on the renewals for the following
permits. If there are any issues or concerns WiRO has with any of these that I can address during the
renewal process, please let me know. I did have a few questions about Beulaville WWTP—see below.
NC0026018 — Beulaville WWTP

• The previous permit included a condition for Lagoon Maintenance. Does this facility still use
the emergency flow EQ lagoon, or has it been abandoned and closed?
• If they still use or plan on using the lagoon in the future, do we need to keep the condition in
the permit for this renewal with new requirements?
NC0083321— Hubert WTP
NC0044806 —Atlantic Beach WTP
NC0047759 — PruittHealth at Sealevel WWTP
Thanks,
Sydney Deuterman (Carpenter) (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-707-3712
NEWEMAIL ADDRESS: sydney.deutermanPdeq.nc.egoov
1617 Mail Service Center
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third
parties by an authorized state official.

Public Notice:
AFFP
North Carolina Environmental
Public Notice North Carolina E
Management Commission/NP-
DES Unit
Affidavit of Publication
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a NP-
DES Wastewater Permit
STATE OF NC) ss
NCO083321 Hubert WTP The
COUNTY OF ONSLOW }
North Carolina Environmental
Management Commission pro-
poses to issue a NPDES
Christy Williamson , being duly sworn, says:
wastewater discharge permit to
the person(s) listed below. Writ -
That she is Christy Williamson, Advertising Director of the
ten comments regarding the pro -
The Daily News, a daily newspaper of general circulation,
posed permit will be accepted
printed and published in Jacksonville, Onslow County, NC;
until 30 days after the publish
that the publication, a copy of which is attached hereto,
date of this notice. The Director
was published in the said newspaper on the following
of the NC Division of Water Re -
December 09, 2023
sources (DWR) may hold a pub-
lic hearing should there be a sig-
nificant degree of public interest.
Please mail comments and/or in-
formation requests to DWR at
the above address. Interested
That said newspaper was regularly issued and circulated
persons may visit the I)NVR at
on those dates.
512 N. Salisbury Street, Raleigh.
SIG ED:
NC 27604 to review the inform-
ation on tile. Additional inform-
L2
ation on NPDES permits and
-
Christy William on, Advertising Director
this notice may be found on our
�e ebsite: httl2s://de!q.nc.gov/pub_
Subscribed to and sworn to me this 9th day of December
lic- notices-hearin s,or by call-
2023.
ink [phone]. Onslow
Water and Sewer Authority [228
Georgetown Rd., Jacksonville.
NC 285401 has requested renew-
Elizabo Goodwin Howell, , Onslow County, NC
al of NPDES permit NCO083321
for Hubert Water Treatment
My commission expires: July 13, 2027,,,E°""""��.,
Plant 1372 Hubert Boulevard] in
Onslow County. This
• ;,a��H ,,�
permitted
facility discharges treated back-
= NO7gR y _
wash and reject softener
A �, " =
70085810 70841360 =
wastewaters to Queen Creek in
,2o21
WREN THEDFORD-(175 Jacksont�}.>�;'�,�`�
the White Oak River Basin.
Current) y * total suspended
DEQ- Division of Water Resource - 1`75_„, CC,.��''�
solids, total residual chlorine.
1617 Mail Service Center
total copper, total lead, and total
RALEIGH, NC 27699
zinc are water quality limited.
This discharge may affect future
allocations in this segment of the
White Oak River Basin.
December 9, 2023

ONWASA
228 Georgetown Rd
Jacksonville, NC 28540
January 5, 2024
Sydney Deuterman, Environmental Specialist II
NPDES Compliance and Expedited Permitting
Division of Water Resources, NCDEQ
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
RE: Draft NPDES Permit No. NCO083321
Hubert Water Treatment Plant
Grade 1 Physical Chemical WPCS
Onslow Water and Sewer Authority, Onslow County
Ms. Deuterman:
In response to your letter of December 5, 2023, regarding the above -referenced
draft NPDES permit (renewal) for ONWASA's Hubert Water Treatment Plant, we offer the
following comments:
Page 2 of 9, Item 1
Please remove potassium permanganate from the list of chemicals used at the plant and
replace it with sodium permanganate. Storage and chemical systems were modified in
2023 to feed sodium permanganate for iron/manganese removal; a copy of the NCDEQ
Final Approval letter for this work is attached.
Page 5 of 9, Part 1, Section A.(3) - Permit Re -Opener: Whole Effluent Toxicity
While there are no proposed revisions to the language within this section, a follow-up
meeting requested by NCDEQ staff to discuss operational changes that have significantly
reduced acute toxicity test failures has not yet been scheduled. Please have appropriate
staff contact Treatment Plant Administrator Seth Brown (sbrown ,onwasa.com) to
schedule this meeting.
Page 6 of 9, Section A.(4) - Schedule of Compliance (Outfall 001)
Please provide justification for the requirement to provide a Corrective Action Plan
submittal by July 1, 2024. Testing completed over the last two years (and previously
reported to NCDEQ) indicate Total Copper, Total Lead and Total Zinc levels consistently
below the limits scheduled to go into effect on July 1, 2025. What corrective actions are
then required?

Page Two
January 5, 2024
Thank you for the opportunity to review the draft permit and offer comments.
Please feel free to contact me directly at [phone] or dmohr(a.onwasa.com if you
have any questions on this information.
Sincerely,
David M. Mohr, P.E.
Chief Operations Officer
Onslow Water and Sewer Authority
Encl.
C: Seth Brown, ONWASA Treatment Facilities Administrator
James Arnold, Hubert WTP ORC

ROY COOPER
co.."ynor
ELIZABETH S. BISER
ccot-ra ry
RICE ARD E. ROGERS, JR.
z:,,.,o.
.d ;\ .
I Z :'.•fir '
1'
NORTH CAROLINA
Fnvirolmental Quality
September 26, 2023
ONSLOW WATER AND SEWER AUTHORITY
ATTN: DAVID M. MOHR, PE CHIEF OPERATING OFFICER
228 GEORGETOWN ROAD
JACKSONVILLE, NC 28540
Re: Final Approval
Final Approval Date: September 26, 2023
HUBERT WTP PERMANGANATE FEED SYS
MODIFICATIONS
Serial No.: 23-00485
Water System Name: ONSLOW WTR AND SEWER
AUTHORITY
Water System No.: NC0467035
Onslow County
Dear Sir/Madam:
The Department received an Engineer's Certification statement and an Applicant's Certification concerning the above
referenced project. The Engineer's Certification verifies that the construction of the referenced project has been completed in
accordance with the engineering plans and specifications approved under Department Serial Number 23-00485. The Applicant's
Certification verifies that an Operation and Maintenance Plan and Emergency Management Plan have been completed and are
accessible to the operator at all times and available to the department upon request and that the system will have a certified operator
as required by 15A NCAC l 8C .1300.
The Department has detennined that the requirements specified in 15A NCAC 18C .0303(a) and (c) have been met, and
therefore, issues this Final Approval in accordance with Rule .0309(a).
Please contact us at [phone] if you have any questions or need additional information.
Sincerely,
Ga%,CLDs'�
Rebecca Sadosky, Ph.D., Chief
Public Water Supply Section
Division of Water- Resources, NCDEQ
cc: HEIDI COX, Regional Engineer
Onslow County Health Deparlinent
ONSLOW WATER AND SEWER AUTHORITY
D- E
��,,_ hnrQ, C;rrnli:r,: [?c�.:rtmcnt nt CnvirOnmrnt;d Qu;dily I Division o` 1S;ercr Rc•c.nlrrcr�
✓��r/�yy ti121:orah Sa!ist;ury Street 11634 7�1 ,i1 Scrvlcc Center I li:,!ciyfl. Nort!1 CaroliraL'1699 ]ba i
919.70)7.9100

From: Deuterman, Svdnev
To: David Mohr
Cc: Seth Brown; James Arnold
Subject: RE: [External] NCO083321 Draft Permit Comments- ONWASA
Date: Wednesday, January 10, 2024 5:26:00 PM
Hi David,
We have received and reviewed your comments on the draft permit for Hubert WTP and offer the
following responses:
• Please remove potassium permanganate from the list of chemicals used at the plant and
replace it with sodium permanganate. Storage and chemical systems were modified in 2023
to feed sodium permanganate for iron/manganese removal; a copy of the NCDEQ Final
Approval letter for this work is attached.
o DWR Response: The Supplement to Cover Sheet has been updated.
• Permit Re -Opener: Whole Effluent Toxicity. While there are no proposed revisions to the
language within this section, a follow-up meeting requested by NCDEQ staff to discuss
operational changes that have significantly reduced acute toxicity test failures has not yet
been scheduled. Please have appropriate staff contact Treatment Plant Administrator Seth
Brown (sbrownna onwasa.com) to schedule this meeting.
o DWR Response: We are happy to meet within the next few weeks to discuss
operational changes at the plant.
• Please provide justification for the requirement to provide a Corrective Action Plan submittal
by July 1, 2024. Testing completed over the last two years (and previously reported to
NCDEQ) indicate Total Copper, Total Lead and Total Zinc levels consistently below the limits
scheduled to go into effect on July 1, 2025. What corrective actions are then required?
o DWR Response: The 2020 permit renewal for this facility included a five-year Schedule
of Compliance for new Copper, Lead, and Zinc limits. This Schedule of Compliance
contained requirements for a Corrective Action Plan to be submitted within one year
from the effective date of July 1, 2020. A review of DWR records show that a Corrective
Action Plan was never received from ONWASA. Additionally, the Schedule of
Compliance required the submission of yearly reports summarizing actions taken, to be
due by the 1st of July for 2022, 2023, and 2024. The 2022 and 2023 reports were also
never received. Failure to meet the requirements of a permit condition can result in
enforcement actions being taken.
After a review of the permit file and discussion with DWR staff, we are including the
requirements of the Schedule of Compliance with this permit renewal to allow
ONWASA the opportunity to detail the actions or strategies that were taken to
achieve compliance with the upcoming metal limits.
If you have any additional questions or concerns, please let me know. I will reach out to Mr. Brown
to schedule a virtual meeting.
Thanks,
Sydney Deuterman (she/her)
Environmental Specialist II

Compliance and Expedited Permitting Unit
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-707-3712
svdneudeutermanRded.nc.,Qov
1617 Mail Service Center
Raleigh, NC 27699-1617
D, E
�
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: David Mohr <[e-mail]>
Sent: Friday, January 5, 2024 2:49 PM
To: Deuterman, Sydney <[e-mail]>
Cc: Seth Brown <[e-mail]>; James Arnold <[e-mail]>
Subject: [External] NCO083321 Draft Permit Comments- ONWASA
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Attached please find our comments on the draft NPDES permit for the Hubert WTP. An original is
also being sent via surface mail. Thanks for the opportunity to review.
David M. Mohr, PE
Chief Operations Officer
0 N WASA
910-937-7521
E-mail correspondence to and from this address may be subject to the North Carolina Public
Records Law and may be disclosed to third parties.

From:
Haines, Andrew
To:
Deuterman. Svdnev
Subject:
RE: DMF Comment Request - NPDES Permit Renewal for Hubert WTP (NC0083321)
Date:
Tuesday, November 28, 2023 8:08:55 AM
Thanks for the opportunity to review Sydney! We do not have any comments on this draft permit.
Have a great rest of the week
Andy
Andrew Haines
Environmental Program Supervisor
Division of Marine Fisheries — Shellfish Sanitation and Recreational Water Quality Section
Department of Environmental Quality
PO Box 769
Morehead City, NC 28557
252-808-8149 office
andrew.hainesZdeq.nc.gov
Please note my new email address. The old ncdenr.gov address will continue to work for a period of
time, but please update my email address in your address book when you have the opportunity.
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Deuterman, Sydney <[e-mail]>
Sent: Monday, November 27, 2023 2:41 PM
To: Haines, Andrew <[e-mail]>
Subject: DMF Comment Request - NPDES Permit Renewal for Hubert WTP (NC0083321)
Hello,
The draft permit renewal for Hubert WTP (NC0083321) is ready for peer agency review.
Hubert WTP is a water treatment facility located in Onslow County utilizing ion exchange treatment
technology with a discharge to Queen Creek (Stream Index 19-41-16). As this facility's discharge is
going to SA; HQW waters, we are requesting Shellfish Sanitation's review and feedback, if any.
I've attached the current draft permit, which will be going out for public notice next week, and the
permitting factsheet. Please send me any feedback you have by January 4th, 2024 for consideration
in the final permit.
Your review and comments are greatly appreciated. Please don't hesitate to let me know if you have
any questions on the draft permit or if there's any additional information you need from me.
Thanks,

Sydney Deuterman (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-707-3712
svdneudeutermanRded.nc.,Qov
1617 Mail Service Center
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third
parties by an authorized state official.

From:
Dunn, Maria T.
To:
Deuterman. Svdnev
Subject:
RE: NC WRC Comment Request - NPDES Permit Renewal for Hubert WTP (NC0083321)
Date:
Wednesday, December 20, 2023 11:20:53 AM
Good morning Ms. Sydney
NCWRC staff have reviewed the NPDES permit renewal and have no specific comment on the
renewal or modification of the permit as described in the attached information.
Thank you for the opportunity to review and provide comment. Please let me know if there is
anything additional.
Maria
Maria T. Dunn
Coastal Coordinator
NC Wildlife Resources Commission
943 Washington Sq. Mall
Washington, NC 27889
252-495-5554
www.ncwildlife.ora
Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
From: Deuterman, Sydney<[e-mail]>
Sent: Monday, November 27, 2023 2:41 PM
To: Dunn, Maria T. <[e-mail]>
Subject: NC WRC Comment Request - NPDES Permit Renewal for Hubert WTP (NC0083321)
Hello,
The draft permit renewal for Hubert WTP (NC0083321) is ready for peer agency review.
Hubert WTP is a water treatment facility located in Onslow County with a discharge to Queen Creek
(Stream Index 19-41-16). As this facility utilizes ion exchange treatment technology and the
discharge is going to SA; HQW waters, we are requesting NC WRC's review and feedback, if any.
I've attached the current draft permit, which will be going out for public notice next week, and the
permitting factsheet. Please send me any feedback you have by January 4th, 2024 for consideration
in the final permit.
Your review and comments are greatly appreciated. Please don't hesitate to let me know if you have

any questions on the draft permit or if there's any additional information you need from me.
Thanks,
Sydney Deuterman (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-707-3712
svdneudeutermanOded.nc.,Qov
1617 Mail Service Center
Raleigh, NC 27699-1617
e7!,ro--fD- E Q5
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third
parties by an authorized state official.

From: Talbott, Jeffrey
To: Deuterman, Sydney
Subject: RE: DRAFT Permit Renewal - Hubert WTP (NC0083321)
Date: Thursday, December 14, 2023 1:42:00 PM
Hello Sydney,
Operator certification notes that this facility is classified as a PC -I, with the ORC and all Backup ORC's
active and in good standing with the program.
We have no comments at this time.
Thank you.
Jeff Talbott
Supervisor, NC Operator Certification Program
Division of Water Resources
Department of Environmental Quality
Phone:[phone]
Email: [e-mail]
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Deuterman, Sydney<[e-mail]>
Sent: Monday, November 27, 2023 2:40 PM
To: Talbott, Jeffrey <[e-mail]>
Subject: DRAFT Permit Renewal - Hubert WTP (NC0083321)
Hello,
The draft permit renewal for Hubert WTP (NC0083321) is ready for review and comment.
This is a PC -I facility in Onslow County.
I'm hoping to submit the draft for Public Notice on December 4, 2023. Please send any
comments to me no later than January 4, 2024 for consideration in the final permit.
Thanks,
Sydney Deuterman (she/her)
Environmental Specialist II

Compliance and Expedited Permitting Unit
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-707-3712
svdneudeutermanPdeq.nc.,Qov
1617 Mail Service Center
Raleigh, NC 27699-1617
e7--5fD E Q,
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third
parties by an authorized state official.