NC0090034_Fact Sheet_20230615

NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET — NEW DISCHARGE PERMIT
NPDES Permit NCO090034
Sydney Deuterman / Compliance & Expedited Permitting Unit / sydney.deuterman(adeq.nc.gov / June 2023
Facility Information
Applicant/Facility Name
Town of Wilkesboro / Attn: Samuel Call, Utility Director
Wilkesboro Water Treatment Plant
Applicant Address
136 Lenderman Street, Wilkesboro, NC 28697
Facility Address
136 Lenderman Street, Wilkesboro, NC 28697
Proposed Permitted Flow (MGD)
0.369 MGD (average est. flow, pg. 10)
Type of Waste
Supernatant from sludge thickener (mechanical pretreatment)
Facility Class
PC-1
County
Wilkes
Permit Status
New Discharge
Regional Office
WSRO
Stream Characteristics
Receiving Stream UT to Moravian Creek Stream Classification
Classification
Stream Segment
12-39
Outfall Lat.
36008'26.8" N
Summer 7Q 10 (cfs)
0.15
Outfall Long.
81 ° 10'28.9" W
Winter 7Q10 (cfs)
0.21
Drainage basin
Yadkin Pee -Dee
30Q2 (cfs)
0.3
Subbasin
03-07-01
Average Flow (cfs)
0.26
Use Support
303(d) Listed
Receiving Stream Not
Impaired
IWC (%)
79.22%
HUC
030401010301
Existing Facility Summary
Wilkesboro WTP is a conventional water treatment plant with a rated capacity of 10.0 MGD (avg daily
flow of 4.79 MGD) that draws raw water from the Yadkin River. The treatment process for raw water
consists of static mixing, flocculation, dual -train sedimentation, filtration, disinfection, clear well storage,
and high service pumping facilities. Residuals from the sedimentation basins flow into a solids storage
basin, where the supernatant is decanted and sent to the sanitary system. Settled sludge is periodically
pumped to a screw press for dewatering prior to landfill disposal. This facility was previously permitted
under NPDES Permit NC0055590.
The existing treatment components at the water treatment plant are the following:
• Raw water intake with pump station
• Static mixer
• Flocculation basins
• Dual -train sedimentation basins
• Chlorine injection
• Four dual -cell multimedia filters
• Sludge holding tank
• Screw press
• Backwash pump
• Clear water distribution box
• Clearwells (finished water)
Chemical usage at the Water Treatment Plant consists of:
• Aluminum sulfate
Fact Sheet for New Permit
June 2023 - NPDES Permit NC0090034 - Page 1

• Sodium Hydroxide (pre- and post -caustic)
• Polymer
• Sodium Hypochlorite
• Fluoride (post -filtration)
Application Review
Due to high, variable turbidity in the source water and ongoing maintenance issues, the Town is looking to
construct a new mechanical pretreatment unit, raw water flow meter, filter improvements, chemical feed
systems, sludge thickener, and all associated structures, piping, electrical, instrumentation, and site
improvements as part of Phase 1 of the Town's Water Treatment Plant upgrade. Raw water will be pumped
into the plant, treated with alum and pre -caustic (NaOH), and then sent through the mechanical pretreatment
unit where polymer will be added. Effluent from the mechanical pretreatment unit will be sent through the
rest of the water treatment plant while the sludge is sent to the sludge thickener. The supernatant from the
thickener will be decanted and discharged via the proposed outfall.
The Town is seeking an individual discharge permit for the wastewater from the mechanical pretreatment
unit and sludge thickener, for discharge into an unnamed tributary to Moravian Creek utilizing the existing
discharge piping and outfall from the old NPDES permit (NC0055590). The estimated discharge flow is
0.369 MGD.
Proposed treatment components for the wastewater discharge include the following:
• Re-routed Alum & Pre -caustic feed
• Mechanical pretreatment system
• Sludge thickener
• Parshall flume
It should be noted that there was conflicting information on the exact proposed discharge location within
the EPA application and EAA documentation. The completed application (EPA Form 2E) indicated that the
discharge would be going into an unnamed tributary to Moravian Creek (36°08'26.8"N, 81°10'28.9"W). The
EAA, however, states that the proposed discharge would be going directly into Moravian Creek and
provides the respective coordinates (36°08'27.9"N, 81°10'33.5"W) and estimated 7Q10 for the creek.
Conflictingly, the EAA also states that the Town will be utilizing the existing discharge piping and outfall
from the WTP's previous NPDES permit (NC0055590). Upon review of DWR's files, the previous
discharge was stated as going into an unnamed tributary to Moravian Creek and not directly into the creek.
Additionally, the previous permit provided coordinates (36°08'29.0"N, 81 ° 10'34.0"W) that differed from
any of the others given. After contacting the applicant's engineering consultant, McGill Associates, the
proposed discharge location has been confirmed to be into an unnamed tributary to Moravian Creek at
the location in Figure 1 (see below).
Fact Sheet for New Permit
June 2023 - NPDES Permit NC0090034 - Page 2

Permitting Summary
As this is for a NEW discharge, the following permitting decisions were made:
• Included Section A. (1) specifying all effluent limits and monitoring requirements, as detailed in the
table below.
• Included Section A. (2) detailing the requirements for WET testing.
• Included Section A. (3) which requires additional effluent monitoring within 2 years after
commencement of discharge.
• Included Section A. (4) requiring the electronic reporting of Discharge Monitoring Reports (DMRs)
to meet current federal requirements.
The following effluent limits and monitoring requirements were included in this permit in Section A. (1):
Parameters
Effluent Limits
Basis of Permit Limits
Mon. Avg. Daily Max.
WTP strategy — Continuous
Flow, MGD
Monitor & Report
monitoring as facility is discharging
> 50,000 GPD
TSS
30.0 m /L 45.0 m /L
WTP strategy
WTP strategy — receiving stream not
Turbidity
Monitor & Report
impaired for turbidity — monitoring
only
pH
> 6.0 and < 9.0 standard units
WTP strategy — freshwater
WTP strategy — monitoring required
Total Copper
Monitor & Report
for new permit — no limits based on
RPA
WTP strategy — monitoring required
Total Zinc
Monitor & Report
for new permit — no limits based on
RPA
Total Aluminum
Monitor & Report
WTP strategy — treatment process
uses Alum — monitoring required
Total Iron
Monitor & Report
WTP strategy — monitoring required
for new permit
Total Manganese
Monitor & Report
WTP strategy — monitoring required
for new permit
WTP strategy — quarterly monitoring
Total Nitrogen
Monitor & Report
required as facility is discharging >
50,000 GPD
WTP strategy— quarterly monitoring
Total Phosphorous
Monitor & Report
required as facility is discharging >
50,000 GPD
WET Testing
Monitor & Report
WTP strategy — conventional plants
should erform ass/fail monitoring__
Hardness
Monitor & Report
WTP strategy — monitoring required
for dissolved metals
WTP strategy — Chlorine is only
TRC
added later in the treatment process,
so should not be present in discharge
— no monitoring required in permit
WTP strategy — Chloramines are not
Ammonia Nitrogen
used for disinfection — no monitoring
required in permit
Fact Sheet for New Permit
June 2023 - NPDES Permit NCO090034 - Page 3

WTP strategy — Fluoride is only
added to treatment process after
Total Fluoride
filtration, so should not be present in
discharge — no monitoring required
in permit
Not a pollutant of concern for
Total Lead
conventional treatment plants — data
showed no detects in RPA — no
monitoring required in permit
WQS = Water Quality Standard
Whole Effluent Toxicity (WET) Testing
In accordance with current strategies designating this facility as a conventional water treatment plant,
WET testing is required in this permit as freshwater Chronic [TGP3B] Pass/Fail Quarterly monitoring
with Ceriodaphnia dubia. Based on the low flow information provided from USGS for the point of
discharge and the estimated discharge flow, the WET testing shall use an effluent concentration of 79%.
(Section A. (2)).
Reasonable Potential Analysis
A reasonable potential analysis (RPA) was performed for a discharger going to a freshwater stream using
the low flow information provided by USGS. Sampling data was provided from settled water at the
Wilkesboro WTP as it was most representative of the proposed discharge.
Copper — no detections; however, Copper is a pollutant of concern for conventional plants, and this
is a new discharge, so monitoring will be required
Lead — no detections; Lead is not a pollutant of concern for conventional plants, therefore no
monitoring required
Zinc — no detections; however, Zinc is a pollutant of concern for conventional plants, and this is a
new discharge, so monitoring will be required
Alternatives Summary (EAA):
Due to high, variable turbidity in the source water and ongoing maintenance issues, the Town is looking to
construct a new mechanical pretreatment unit, a gravity sludge thickener, and improvements to the filtration
system as part of Phase 1 of the Town's Water Treatment Plant upgrade. The Town is seeking an individual
discharge permit for wastewater from the mechanical pretreatment unit, which will flow to a gravity
thickener and the supernatant will be intermittently discharged via the proposed outfall into a UT to
Moravian Creek. The estimated discharge flow is 0.369 MGD.
The Town evaluated four alternatives which have been summarized below. The Town has concluded that a
discharge to surface waters is the most feasible option.
• Connection to sewer system
o Supernatant from the existing sludge handling process currently flows to the Town's
WWTP.
o The Town stated in a letter from the Utility Director that the WWTP will not be able to
accept the additional flow from the WTP due to the estimated flow volume (256 gpm when
the WTP is at max capacity of 16 MGD) and the low concentrations of BOD, TSS, and
other nutrients which would likely disrupt the biological treatment processes at the WWTP.
The letter states that the WWTP is already approaching 90% of their design capacity and
construction of their expansion will not be completed for the next 3-5 years, and the
collection system would similarly need significant upgrades to handle the volume of flow.
• Land Application (Non -Discharge)
Fact Sheet for New Permit
June 2023 - NPDES Permit NC0090034 - Page 4

o The purchase of farmland in close proximity to the WTP was considered for a spray
irrigation system. Soils for Wilkes County near Wilkesboro are indicated as unsuitable for
disposal of wastewater by irrigation, subsurface dispersal, or drip irrigation. Based on
McGill's estimation, 136.3 acres would be needed for irrigation, however 200 acres would
need to be purchased due to setbacks. A pump station, storage, and irrigation piping would
need to be constructed and maintained. The total present value cost of this alternative is
$5,894,407 (in 2020).
• Public Reuse
o The Town currently does not have infrastructure in place for a reuse system within the
service area. The estimated daily volume of wastewater is insufficient to provide reuse for
the entire service population, however a select group of customers (i.e. golf course or
industry) was considering. A pump station, storage, force main, and irrigation infrastructure
would need to be constructed and maintained. The total present value cost of this
alternative is $3,949,006 (in 2020).
Discharge to Surface Waters
o The Town previously held an NPDES permit (NC0055590) for disposal of wastewater
generated during the sludge disposal process. This new proposed discharge would reutilize
the existing discharge piping and outfall from the previous permit. Construction of a
gravity discharge pipeline to the existing outfall line would be needed, but no other
construction would be required outside of the WTP site. Chlorine would be fed downstream
of the MPT system, therefore dechlorination would not be required. The proposed
discharge is to an unnamed tributary to Moravian Creek (stream index 12-39), a class C
waterbody. The total present value cost of this alternative is $186,240.00 (in 2020).
Comments on Draft Permit
• ATB requests that the WET effluent concentration be changed to only two significant figures (79%
vs. 79.22%).
Fact Sheet for New Permit
June 2023 - NPDES Permit NCO090034 - Page 5

From:
MJ Chen
To:
Caroenter.Sydney
Cc:
Sam Call; Patrick Cusack
Subject:
RE: [External] Wilkesboro NPDES Permit
Date:
Friday, February 3, 2023 9:54:02 AM
Attachments:
imaae002.Dna
FW USGS response to DWR USGS Low Flows request # 2023-254 (dated 20230120) for UT Moravian Creek
Wilkes County... Re EXTERNAL Low -flow request aooroval.msa
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Reenort Spam.
Hi, Sydney
Thanks for the information. We also got the response back from the USGS (see attached
email). It seems that the unnamed creek is not a zero -flow stream. After discussing with the
Town, we decided that we will keep the outfall location (unnamed creek). Do you need
anything else from us to get the draft permit issued? Thank you very much!
Have a great weekend!
Regards,
MJ
I Fri
Mcglll
Shaping
Communities
Together®
MJ Chen, PhD, PE (she/her)
Senior Project Manager
McGill Associates, PA
55 Broad Street, Asheville, NC 28801
T 828.412.4597
C 828.767.0553
mi.chenamcail lassociates.com
mcgillassociates.com
From: Carpenter, Sydney <[e-mail]>
Sent: Thursday, February 2, 2023 4:13 PM
To: MJ Chen <[e-mail]>
Cc: Sam Call <[e-mail]>; Patrick Cusack <[e-mail]>
Subject: RE: [External] Wilkesboro NPDES Permit
Hi MJ,
After further review of the data provided with the application, it looks like the pollutants of concern
which could've received the benefit of dilution credit were not found in detectable levels in the

sample. Therefore, no limits are being assigned for these pollutants (specifically Copper and Zinc) in
the draft permit, however monitoring will still be required as this will be a new discharge permit.
If the Town would still like to pursue changing the outfall to directly into Moravian Creek instead of
the unnamed tributary, please let me know. This would provide dilution and could help with limits if
there are any future detections of these pollutants.
Thanks,
Sydney Carpenter (she/her)
Environmental Specialist 1
Compliance and Expedited Permitting Branch
Division of Water Resources
NC Department of Environmental Quality
Office: [phone]
syd ney. carpenter(a)ncdenr.gov
1617 Mail Service Center
Raleigh, NC 27699-1617
e:!5-of DE
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V"urimml ui EnulmnMM131 Qua111T
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: MJ Chen <mi.chen(@mcgillassociates.com>
Sent: Wednesday, January 18, 2023 11:53 AM
To: Carpenter, Sydney <sydney.carpenter(@ncdenr.gov>
Cc: Sam Call <scall(@wilkesboronc.org>; Patrick Cusack <Patrick.cusack(@mcgillassociates.com>
Subject: RE: [External] Wilkesboro NPDES Permit
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Hi, Sydney
Thank you for making time to talk with us about this earlier.
As we discussed in our call, the actual discharge outfall is to the unnamed tributary to
Moravian Creek (36°08'26.8"N 81°10'28.9"W).
We are going to reach out to the USGS for stream flows. Please send us permit limits for
no dilution credit when you get a chance.
Once again, thank you and we really appreciate your time.
Regards,

MJ
Mcgili
Shaping
Communities
Together®
MJ Chen, PhD, PE (she/her)
Senior Project Manager
McGill Associates, PA
55 Broad Street, Asheville, NC 28801
T 828.412.4597
C 828.767.0553
mj.chen&mcgillassociates.com
mcgillassociates.com
From: Carpenter, Sydney <sydney.carpenter(@ncdenr.gov>
Sent: Monday, January 9, 2023 1:55 PM
To: MJ Chen <mj.chen(@mcgillassociates.com>
Cc: Sam Call <scall(@wilkesboronc.org>
Subject: RE: [External] Wilkesboro NPDES Permit
Hi Ms. Chen,
I had a quick question for you regarding the exact location of the proposed discharge point for the
Wilkesboro WTP permit (NC0090034). The application itself (EPA Form 2E) indicates that the
discharge would be going into an unnamed tributary to Moravian Creek (36°08'26.8"N
81°10'28.9"W). However, in the EAA provided with the application, it states that the proposed
discharge would be going directly into Moravian Creek and provides coordinates for the stream
(36°08'27.9"N 81°10'33.5"W) along with an estimated 7Q10 of 9.1 cfs.
Additionally, the EAA states that the Town will be utilizing the existing discharge piping and outfall
from their previous NPDES permit (NC0055590). Upon review of DWR's files, it looks like the original
permitted outfall was discharging into the unnamed tributary to Moravian Creek and was
considered a zero -flow stream.
I need to confirm whether the proposed discharge would be going into the unnamed tributary or
into the Moravian Creek itself, as this will determine whether any dilution credit can be applied for
the development of permit limits.
Thanks,
Sydney Carpenter (she/her)

Environmental Specialist 1
Compliance and Expedited Permitting Branch
Division of Water Resources
NC Department of Environmental Quality
Office: [phone]
sydney.carpenter(@.ncdenr.gov
1617 Mail Service Center
Raleigh, NC 27699-1617
Uc Psi: Inw'it u1 Eml�Lal UL ality
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: MJ Chen<mi.chenCcDmcgillassociates.com>
Sent: Monday, October 31, 2022 9:05 AM
To: Carpenter, Sydney <svdney.carpenterCcDncdenr.gov>
Cc: Sam Call <[e-mail]>
Subject: RE: [External] Wilkesboro NPDES Permit
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Ms. Carpenter
Thank you so much for letting us know.
Have a great week!
Regards,
MJ
IVA
Mcgilishaping
Communities
Together®
MJ Chen, PhD, PE (she/her)
Senior Project Manager
McGill Associates, PA
55 Broad Street, Asheville, NC 28801
T 828.412.4597
C 828.767.0553

mj.chen a mcgiIlassociates.com
mcgillassociates.com
From: Carpenter, Sydney <svdney.carpenter(@ncdenr.gov>
Sent: Friday, October 28, 2022 5:02 PM
To: MJ Chen <mi.chen(@mcgillassociates.com>
Cc: Sam Call <scall(@wilkesboronc.org>
Subject: RE: [External] Wilkesboro NPDES Permit
Hi MJ,
I'm currently still reviewing the application. I have a meeting with our engineers the week of Nov 7th
but it is my hope to have a draft permit ready for public notice by the end of November, if not the
first week of December. Please let me know if you need anything in the meantime!
Thanks,
Sydney Carpenter (she/her)
Environmental Specialist I
Compliance and Expedited Permitting Unit
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-707-3712
sydney.carp enterPncdenr.gov
1617 Mail Service Center
Raleigh, NC 27699-1617
c D, E Q
%1�
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: MJ Chen <mi.chen(@mcgillassociates.com>
Sent: Tuesday, October 25, 2022 8:46 AM
To: Carpenter, Sydney <svdney.carpenter(@ncdenr.gov>
Cc: Sam Call <scall(@wilkesboronc.org>
Subject: [External] Wilkesboro NPDES Permit
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Good morning, Ms. Carpenter

Could you please provide an update on the status of this permit review?
Thank you very much!
Sincerely,
MCgIII
Shaping
Communities
Together
MJ Chen, PhD, PE (she/her)
Senior Project Manager
McGill Associates, PA
55 Broad Street, Asheville, NC 28801
T 828.412.4597
C 828.767.0553
mj.chen&mcgillassociates.com
mcgillassociates.com

From: Patrick Cusack
To: MJ Chen
Subject: FW: USGS response to DWR USGS Low Flows request # 2023-254 (dated 2023/01/20) for UT Moravian Creek
Wilkes County... Re: [EXTERNAL] Low -flow request approval
Date: Wednesday, February 1, 2023 1:54:06 PM
fyi
Patrick Cusack, El
Engineering Associate II
McGill Associates, PA
55 Broad Street, Asheville, NC 28801
T 828.252.0575
D 828.412.4657
Datrick.cusack(a mcaillassociates.com
mcgillassociates.com
From: Weaver, John C <[e-mail]>
Sent: Wednesday, February 1, 2023 12:06 PM
To: Patrick Cusack <[e-mail]>
Cc: [e-mail]; Montebello, Michael J<[e-mail]>;
Dowden, Doug <[e-mail]>; Litzenberger, Kristin S
<[e-mail]>; Denard, Derek <[e-mail]>; Albertin, Klaus P
<[e-mail]>; Weaver, John C <[e-mail]>
Subject: USGS response to DWR USGS Low Flows request # 2023-254 (dated 2023/01/20) for UT
Moravian Creek Wilkes County... Re: [EXTERNAL] Low -flow request approval
Mr. Cusack,
In response to your inquiry about the low -flow characteristics for a location on an unnamed tributary
to Moravian Creek between School Street and the on -ramp approach to U.S Highway 421 South at
Wilkesboro in southern central Wilkes County, the following information is provided:
For the record: This low -flow request is a follow-up to a previous request (#2020-87, dated
2020/08/10) that was submitted in August 2020 for low -flow characteristics on a nearby point of
interest on Moravian Creek.
A check of the low -flow files here at the USGS South Atlantic Water Science Center (Raleigh office)
does not indicates a previous low -flow determination for the point of interest, identified by the
lat/long coordinates (36.140778,-81.174694) provided via email dated 01/20/2023 from the DWR
USGS Low Flows portal following your request submission.

In the absence of site -specific discharge records sufficient for a low -flow analysis, estimates of
low -flow characteristics at ungaged locations are determined by assessing a range in the low -flow
yields (expressed as flow per square mile drainage area, or cfsm) at nearby sites where estimates
have previously been determined.
A basin delineation completed using the online USGS StreamStats application for North Carolina
(https://streamstats.usgs.gov/ss/) indicates the drainage area for the point of interest (StreamStats
adjusted coordinates 36.14092,-81.17470 NAD83) is 0.4 sgmi.
For streams in Wilkes County, low -flow characteristics published by the USGS are provided in the
following reports:
(1) The first is a statewide report completed in the early 1990's. It is USGS Water -Supply Paper 2403,
"Low -flow characteristics of streams in North Carolina" (Giese and Mason, 1993). An online version
of the report is available at http://pubs.usgs.gov/wsp/2403/report.pdf. The report provides the low -
flow characteristics (based on data through 1988) via regional relations and at -site values for sites
with drainage basins between 1 and 400 sgmi and not considered or known to be affected by
regulation and/or diversions.
(2) The second is a statewide report published in March 2015. It is USGS Scientific Investigations
Report 2015-5001, "Low -flow characteristics and flow -duration statistics for
selected USGS continuous -record streamgaging stations in North Carolina through 2012" (Weaver,
2015). The report is available online at http_//pubs.usgs.gov/sir/2015/5001/. The report provides
updated low -flow characteristics and flow -duration statistics for 266 active (as of 2012 water year)
and discontinued streamgages across the state where a minimum of 10 climatic years discharge
records were available for flow analyses.
Low -flow characteristics estimated for point of interest:
There are very limited USGS streamflow records for small to very small basins in North Carolina.
Inspection of the reports indicates the presence of eight (8) nearby selected USGS partial -record
sites (6) and continuous -record streamgages (2) in the general vicinity of the point of interest where
low -flow characteristics were published. This group of index sites includes a USGS partial -record site
on Moravian Creek near Wilkesboro (station id 02111410, drainage area 24.7 sgmi, at NC Highway
268). Discharge records for this partial -record site consist of 14 miscellaneous measurements
obtained during the 1954-81 water years. Low -flow characteristics for this site were last published in
Table 1 within USGS Water -Supply Paper 2403 (Giese and Mason, 1993). For the record, it should be
acknowledged that the range in drainage areas for all index sites is at least two magnitudes above
the drainage area for the point of interest.
Among these 8 index sites, the low -flow discharge yields for the indicated flow statistics are as
follows:
Annual 7Q10 low -flow yields =_> from 0.26 to 0.45 cfsm (both average and median about 0.38 cfsm)
Annual 30Q2 low -flow yields =_> from 0.63 to 0.83 cfsm (both average and median about 0.74 cfsm)

Winter 7Q10 low -flow yields ==> from 0.39 to 0.58 cfsm (average about 0.53 cfsm, median about
0.55 cfsm)
Annual 7Q2 low -flow yields ==> from 0.53 to 0.71 cfsm (both average and median about 0.64 cfsm)
Average annual discharge yields ==> from 1.3 to 1.9 cfsm (both average and median about 1.6 cfsm)
Application of the above range in yields to the drainage area (0.4 sgmi) for the point of interest
results in the following estimated low -flow discharges:
Annual 7Q10 low -flow discharges =_> from 0.1 to 0.18 cfs (both average and median about 0.15 cfs)
Annual 30Q2 low -flow discharges =_> from 0.25 to 0.33 cfs (both average and median about 0.3 cfs)
Winter 7Q10 low -flow discharges =_> from 0.16 to 0.23 cfs (average about 0.21 cfs, median about
0.22 cfs)
Annual 7Q2 low -flow discharges ==> from 0.21 to 0.28 cfs (both average and median about 0.26 cfs)
Average annual discharge discharges ==> from 0.52 to 0.76 cfs (both average and median about 0.64
cfs)
Please note:
(1) The estimated flows are provided in units of cubic feet per second (cfs).
(2) The low -flow yields provided above are rounded to 2 significant figures. Estimated low -flow
discharges less than 1 cfs are rounded to 2 significant figures. If between 1 and 100 cfs, then
rounded to 1 decimal place; if greater than 100, then rounded to the nearest whole number (zero
decimal places).
(3) The information provided in this message is based on a preliminary assessment and considered
provisional, subject to revision pending collection of future data and further analyses.
These provisional streamflow statistics are provided via the DWR USGS Low Flows cooperative
agreement between the USGS and the N.C. Department of Environmental Quality, Division of Water
Resources.
Hope this information is helpful.
Thank you.
Curtis Weaver
J. Curtis Weaver, Hydrologist, PE Email: icweaver(a)usgs.gov
USGS South Atlantic Water Science Center Online: https://www.usgs.gov/centers/sa-water
North Carolina - South Carolina - Georgia
3916 Sunset Ridge Road
Raleigh, NC 27607
Phone: [phone] // Fax: [phone]

From: Albertin, Klaus P <klaus.albertin(@ncdenr.gov>
Sent: Friday, January 20, 2023 1:33 PM
To: patrick.cusackPmcgillassociates.com <Patrick.cusack(@mcgillassociates.com>
Cc: Albertin, Klaus P <klaus.albertin(@ncdenr.gov>; adugna.kebede(@ncdenr.gov
<adugna.kebede(@ncdenr.gov>; Weaver, John C <icweaver(@usgs.gov>; Montebello, Michael J
<Michael.Montebello(@ncdenr.gov>; Dowden, Doug <doug.dowden(@ncdenr.gov>; Litzenberger,
Kristin S <Kristin.Litzenberger(@ncdenr.gov>; Denard, Derek <derek.denard(@ncdenr.gov>
Subject: [EXTERNAL] Low -flow request approval
This email has been received from outside of DOI - Use caution before clicking on links,
opening attachments, or responding.
Your request has been approved and will be forwarded to USGS. A response from USGS
usually takes 7 - 10 business days.
Request Flow Statistic Approval
Request ID: 254
Requestor: Patrick Cusack
Requestor e-mail: patrick.cusackna mcgill associates. corn
Requestor Phone: [phone]
Local Government:
Public Water Supply:
Consultant: McGill Associates
Contact: Patrick Cusack
Reason: Permit
River/Stream: Unnamed tributary to Moravian Creek
Drainage Area (sq. mi.): 0.41

Latitude: 36.140778
Longitude:-81.174694
Other Information: Point of interest is situated between School Street and the US HWY 421 S
onramp in Wilkesboro, NC.Result for this location may have a 7Q10 of 0 and the WTP may
have to consider the Moravian Creek location.
Statististics: ["7Q10","30Q2","Average Annual","7Q10 - Winter","7Q211]
Approved by: Albertin, Klaus P

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Table 1. Project Information
❑ CHECK IF HQW OR ORW WQS
Facility Name Wilkesboro WTP
REQUIRED DATA ENTRY
Par01
WWTP/WTP Class
Par02
NPDES Permit
NCO090034
Par03
Outfal I
001
Par04
Flow, Qw (MGD)
Par05
0.369
Receiving Stream
UT to Moravian Creek
Par06■
HUC Number
030401010301
Par07
Stream Class
C
0.15
Par08
Par09
Par10
❑ Apply WS Hardness WQC
7Q10s (cfs)
7Q10w (cfs)
0.21
Par11
30Q2 (cfs)
0.30
Par12
QA (cfs)
0.26
Par13
1 Q10s (cfs)
Par14
Par15
0.13
Effluent Hardness
10 mg/L (Avg)
Upstream Hardness
25 mg/L (Avg)
Par16
Combined Hardness Chronic
25 m /L
I Par17
Combined Hardness Acute
25 m_/L
I Par18
I Par19
Par20
Data Source(s)
❑ CHECK TO APPLY MODEL
Par21
Par22
Par23
Par24
Table 2. Parameters of Concern
Name WQS Type Chronic Modifier Acute PQL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
HH/WS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic Life
NC
0.5899
FW
3.2396
ug/L
Chlorides
Aquatic Life
NC
230
FW
mg/L
Chlorinated Phenolic Compounds
Water Supply
NC
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
NC
300
A
ug/L
Chromium III
Aquatic Life
NC
117.7325
FW
905.0818
ug/L
Chromium VI
Aquatic Life
NC
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
7.8806
FW
10.4720
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Life
NC
1,800
FW
ug/L
Lead
Aquatic Life
NC
2.9416
FW
75.4871
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
ng/L
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
37.2313
FW
335.2087
pg/L
Nickel
Water Supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
ug/L
Silver
Aquatic Life
NC
0.06
FW
0.2964
ug/L
Zinc
Aquatic Life
NC
126.7335
FW
125.7052
ug/L
NCO090034 RPA v1 2023, input
2/23/2023

REASONABLE POTENTIAL ANALYSIS
H1
Effluent Hardness
Date
Data BDL=1/2DL
Results
1
1 /26/2021
8 8
Std Dev.
2
2/23/2021
12 12
Mean
3
3/23/2021
10 10
C.V. (default)
4
n
5
10th Per value
6
Average Value
7
Max. Value
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
H2
Use "PASTE SPECIAL
Values" then "COPY"
Maximum data
points = 58
2.0000 1
10.0000 2
0.6000 3
3 4
8.40 mg/L 5
10.00 mg/L 6
12.00 mg/L 7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Upstream Hardness
Date Data BDL=1/2DL Results
25 25 Std Dev.
Mean
C.V.
n
10th Per value
Average Value
Max. Value
Use "PASTE SPECIAL
Values" then "COPY"
Maximum data
points = 58
25.0000
0.0000
1
25.00 mg/L
25.00 mg/L
25.00 mg/L
NCO090034 RPA v1 2023, data
- 1 - 2/23/2023

REASONABLE POTENTIAL ANALYSIS
-2-
NC0090034 RPA v1 2023, data
2/23/2023

REASONABLE POTENTIAL ANALYSIS
Par21
Use "PASTE SPECIAL
Zinc
Values" then "COPY"
Maximum data
points = 58
Date
Data BDL=1/2DL
Results
1
1 /26/2021
< 10 5
Std Dev.
0.0000
2
2/23/2021
< 10 5
Mean
5.0000
3
3/23/2021
< 10 5
C.V. (default)
0.6000
4
n
3
5
6
Mult Factor =
3.00
7
Max. Value
5.0 ug/L
8
Max. Pred Cw
15.0 ug/L
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
NCO090034 RPA v1 2023, data
-3- 2/23/2023

Wilkesboro WTP >
NCO090034 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Qw (MGD) =
0.3690
WWTP/WTP Class:
1Q10S (cfs) =
0.13
IWC% @ 1Q10S =
81.4801624
7Q10S (cfs) =
0.15
IWC% @ 7Q10S =
79.22293788
7Q10W (cfs) =
0.21
IWC% @ 7Q10W =
73.14406292
30Q2 (cfs) =
0.30
IWC% @ 30Q2 =
65.59435747
Avg. Stream Flow, QA (cfs) =
0.26
IW%C @ QA =
68.74812188
Receiving Stream: UT to Moravian Creek HUC 030401010301
Stream Class:
C
Outfall 001
Qw = 0.369 MGD
COMBINED HARDNESS (mg/L)
Acute = 25 mg/L
Chronic = 25 mg/L
PARAMETER
NC STANDARDS OR EPA CRITERIA
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
J
CY
H
n
Applied
Chronic Acute0.
n # Det. Max Pred Cw Allowable Cw
Standard
Acute: 12.85
No Detects (new Permit, New Waste Stream) - apply
Copper
NC
7.8806 FW(7Q10s) 10.4720
ug/L
3 0
3.00
Monthly Monitoring, Pollutant of concern
Note: n < 9
C.V. (default)
Chronic: 9.95
Limited data set
NO DETECTS
Max MDL = 2
Acute: 92.645
No Detects (new Permit, New Waste Stream) - no
Lead
NC
2.9416 FW(7Q10s) 75.4871
ug/L
3 0
15.000
Monitoring, not a pollutant of concern
Note: n < 9
C.V. (default)
Chronic: 3.713
Limited data set
NO DETECTS
Max MDL = 10
Acute: 154.3
o Detects, however New Permit, New Waste
-apply Monthly Monitoring, Pollutant of
Zinc
NC
126.7335 FW(7Q10s) 125.7052
ug/L
3 0
15.0
[tream
Note: n < 9
C.V. (default)
______________o_nce_rn________________________
Chronic: 160.0
Limited data set
NO DETECTS
Max MDL = 10
Acute:
0 0
N/A
-----------------
Chronic:
---------------------------
Acute:
0 0
N/A
-----------------
Chronic:
---------------------------
Acute:
0 0
N/A
--Chronic:-----------
---------------------------
Acute:
0 0
N/A
--Chronic:-----------
---------------------------
Page 3 of 3
NCO090034 RPA v1 2023, rpa
2/23/2023

6/12/23, 3:42 PM https://www.ncnotices.com/(S(yuOIpmclg5gwgnmfjdObfncl))/DetailsPrint.aspx?SID=yu0ipmclg5gwgnmfjjdObfncl&ID=377828
ipt>
Winston-Salem Journal
Publication Name:
Winston-Salem Journal
Publication URL:
Publication City and State:
Winston-Salem, NC
Publication County:
Forsyth
Notice Popular Keyword Category:
Notice Keywords:
nc0090034
Notice Authentication Number:
202306121442090004492
2510867466
Notice URL:
Back
Notice Publish Date:
Thursday, April 27, 2023
Notice Content
Public Notice State of North Carolina/Environmental Management Commission 1617 Mail Service Center, Raleigh, NC 271
Intent to Issue a NPDES wastewater permit. The North Carolina Environmental Management Commission proposes to is:
wastewater discharge permit to the person(s) listed below. The Town of West Jefferson requested renewal of permit NC(
Jefferson WWTP in Ashe County. This permitted discharge is treated municipal wastewater to an unnamed tributary to L
the New River Basin. The Town of Wilkesboro has applied for a new NPDES permit (NC0090034) for the Wilkesboro WTF
This facility would discharge to an unnamed tributary to Moravian Creek/Yadkin-Pee Dee River Basin. Written comments
proposed permit will be accepted until 30 days after the publish date. The Director of the NC Division of Water Resource
hearing should there be a significant degree of public interest. Interested persons may visit the DWR at 512 N. Salisbur,
27699. Please mail comments and/or information requests to DWR at the address listed above. Additional information o
this notice may be found on our website: http://deq.nc.gov/about/divisions/water-resources/water-resources-permits/A
bra nch/npdes-wastewater/public-notices, or by calling [phone]. WSJ: April 27, 2023.
Back
https://www. ncnotices.com/(S(yuOlpmclg5gwgnmfjdObfncl))/DetailsPrint.aspx?SID=yu0ipmclg5gwgnmfjdObfncl&I D=377828 1 /1

North Carolina Department of Environmental Quality
Water Pollution Control System Operators Certification Commission
Roy Cooper W. Corey Basinger Elizabeth Biser
Governor Chairman Secretary
June 14, 2023
SENT VIA CERTIFIED MAIL
RETURN RECEIPT REQUESTED:
Mr. Kenneth D. Noland
Town Manager, Town of Wilkesboro
P.O. Box 1056
Wilkesboro, North Carolina 28697-1056
SUBJECT: CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEM: PC -I
Wilkesboro WTP
Permit Number: NCO090034
Wilkes County
Dear Mr. Noland,
In accordance with North Carolina General Statute § 90A-37, the Water Pollution Control System Operators
Certification Commission is required to classify all water pollution control systems.
Upon review of the subject permit, the Water Pollution Control System Operators Certification Commission
has determined that the subject facility is classified as follows:
Grade I Physical -Chemical Water Pollution Control Treatment System - Effective: 6/1/2023
15A NCAC 08G .0306(a)
60-days prior to wastewater or residuals being introduced into a new system, the system owner must designate
a Grade I Physical Chemical Operator in Responsible Charge (ORC) and Back-up Operator in Responsible Charge
as required by rule, and your permit.
Please complete and return the ORC Designation Form to this office via USPS or email to: [e-mail].
15A NCAC 8G .0201
If you have any questions concerning this classification or the designation of operators, please contact me at
919-707-9038, or via email at [e-mail].
Sincerely,
allA
Extension Education & Training Specialist
NC Operators Certification Program
ec: Brenda Welborn, Town of Wilkesboro
Jenny Graznak, NC DEQ Winston-Salem Regional Office, Water Quality Regional Operations
Sydney Deuterman, NC DEQ NPDES Permitting
Central Files
1618 Mail Service Center I Raleigh, North Carolina 27699-1618
919 707 9190 1 Fax [phone] http://deq.nc.gov/opcert

From: Moore, Cindv
To: Caroenter.Sydney
Subject: Re: New Discharge Permit - TOX Monitoring Months
Date: Thursday, February 23, 2023 2:19:32 PM
yes
From: Carpenter, Sydney <[e-mail]>
Sent: Thursday, February 23, 2023 2:14 PM
To: Moore, Cindy <[e-mail]>
Subject: New Discharge Permit - TOX Monitoring Months
Hi Cindy,
I'm drafting a new discharge permit for a conventional WTP (Wilkesboro WTP — NC0090034). The
proposed discharge is going into UT to Moravian Creek, which is in the Yadkin Pee -Dee basin, sub -
basin 03-07-01.
Based on other facilities discharging in the same sub -basin, I've assigned the following WET
monitoring months for this new permit: March, June, September, and December. Are these months
correct?
Thanks,
Sydney 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
sydney.carp enterna ncdenr.gov
1617 Mail Service Center
Raleigh, NC 27699-1617
tvey Ad -
Email

From:
Youna, Brianna A
To:
Nelson Herinaer; Hennessy, John
Cc:
MJ Chen; DelDuco, Emily; Carpenter, Sydney
Subject:
RE: [External] Wilkesboro WTP - NPDES Permit
Date:
Friday, October 30, 2020 10:58:48 AM
Attachments:
imaae001.Dna
image002.pnno
Nelson,
The tests need to be performed on separate days as tests need to be representative of all potential
discharges. So for example, if discharge varies from day to day, either due to different chemical
treatments or potential variability in source water, the tests need to be conducted on different days
to get an idea of what the overall discharge will look like. Please let me know if you have any other
questions.
Thank you,
Brianna Young, MS
Environmental Specialist II
Compliance and Expedited Permitting Unit
NC DEQ / Division of Water Resources
Office: 919-707-3619
Brian na.YoungPa ncdenr.gov (e-mail preferred during State of Emergency)
Mailing address: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental
Quality has adjusted operations to protect the health and safety of the staff and public. Many employees
are working remotely or are on staggered shifts. To accommodate these staffing changes, all DEQ office
locations are limiting public access to appointments only. Please check with the appropriate staff before
visiting our offices, as we may be able to handle your requests by phone or email. We appreciate your
patience as we continue to serve the public during this challenging time.
From: Nelson Heringer <[e-mail]>
Sent: Friday, October 30, 2020 9:53 AM
To: Young, Brianna A <[e-mail]>; Hennessy, John <[e-mail]>
Cc: MJ Chen <[e-mail]>; DelDuco, Emily <Emily.Del [e-mail]>;
Carpenter, Sydney <[e-mail]>
Subject: RE: [External] Wilkesboro WTP - NPDES Permit
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to reoort.spam annc.gov
Brianna,

For the triplicate testing, is there a requirement for time between samples? For example, can the
tests all be done simultaneously or do they need to be performed on separate days?
Thanks,
Communities
Together
Nelson Heringer, PE
Project Engineer
McGill Associates, P.A.
55 Broad Street, Asheville, NC 28801
T 828.252.0575 x122
D 828.412.4596
nelson.heringer&mcgillassociates.com
mcgillassociates.com
From: Young, Brianna A <Brianna.YoungPncdenr.gov>
Sent: Friday, October 23, 2020 3:21 PM
To: Nelson Heringer <nelson.heringer(cDmcgillassociates.com>; Hennessy, John
<iohn.hennessy(@ncdenr.gov>
Cc: MJ Chen <mi.chen(@mcgillassociates.com>; DelDuco, Emily <Emily.Del Duco(CDncdenr.goy>;
Carpenter, Sydney <sydney.carpenter(@ncdenr.gov>
Subject: RE: [External] Wilkesboro WTP - NPDES Permit
Nelson,
Yes, that sampling is applicable. Please provide it (if available) along with the other required
monitoring. We prefer multiple samples be taken and tested for all parameters as this gives a better
picture of what may be in the proposed effluent stream over time. The number of samples provided
also affects any reasonable potential analysis done to determine permit limits. In regards to toxicity
sampling, yes we do require dilution tests be done in triplicate (so 3 tests for each dilution). Please
let me know if you have any other questions.
Thank you,
Brianna Young, MS
Environmental Specialist II
Compliance and Expedited Permitting Unit
Division of Water Resources
NC Department of Environmental Quality
Office: 919-707-3619
Brianna.Young&ncdenr.gov

Mailing address: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina Public Records Law and
may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental
Quality has adjusted operations to protect the health and safety of the staff and public. Many employees
are working remotely or are on staggered shifts. To accommodate these staffing changes, all DEQ office
locations are limiting public access to appointments only. Please check with the appropriate staff before
visiting our offices, as we may be able to handle your requests by phone or email. We appreciate your
patience as we continue to serve the public during this challenging time.
From: Nelson Heringer <nelson.heringer(@mcgillassociates.com>
Sent: Friday, October 23, 2020 2:54 PM
To: Young, Brianna A <Brianna.Young(@ncdenr.gov>; Hennessy, John <iohn.hen nessy(@ncdenr.gov>
Cc: MJ Chen <mi.chen(@mcgillassociates.com>
Subject: RE: [External] Wilkesboro WTP - NPDES Permit
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to reaort.spamPnc.gov
Brianna,
Another question I had related to the sampling was whether the following is applicable:
If available, submit data on Phosphate as P, Total Alkalinity (as CaCO3), Bicarbonate,
Carbonate, Hydroxide Alkalinity, Silica, Sulfate, and Sodium.
Additionally, do all samples need to be done in triplicate or just the WET Testing? If we are testing at
the dilutions do we need to do triplicate samples or will the five total tests suffice?
Thanks,
?Mm 0omm9
cunities
Together
Nelson Heringer, PE
Project Engineer
McGill Associates, P.A.
55 Broad Street, Asheville, NC 28801
T 828.252.0575 x122
D 828.412.4596
nelson.herinaeramcaillassociates.com
mcgillassociates.com

From: Young, Brianna A <Brianna.YoungPncdenr.gov>
Sent: Wednesday, October 14, 2020 2:39 PM
To: Nelson Heringer <nelson.heringer(@mcgillassociates.com>; Hennessy, John
<iohn.hennessy(@ncdenr.gov>
Cc: MJ Chen <mi.chen(@mcgillassociates.com>
Subject: RE: [External] Wilkesboro WTP - NPDES Permit
Nelson,
Thank you for meeting with us today. As I mentioned in our call, please contact Cindy Moore with
the Aquatic Toxicology Branch to discuss the aquatic testing and dilutions needed for the permit
application. Her phone number is 919-743-8442 and her email is cindy.a.moore(@ncdenr.gov.
Please let me know if you have any other questions.
Thank you,
Brianna Young, MS
Environmental Specialist II
Compliance and Expedited Permitting Unit
Division of Water Resources
NC Department of Environmental Quality
Office: 919-707-3619
Brianna.Young(2ncdenr.gov
Mailing address: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina Public Records Law and
may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental
Quality has adjusted operations to protect the health and safety of the staff and public. Many employees
are working remotely or are on staggered shifts. To accommodate these staffing changes, all DEQ office
locations are limiting public access to appointments only. Please check with the appropriate staff before
visiting our offices, as we may be able to handle your requests by phone or email. We appreciate your
patience as we continue to serve the public during this challenging time.
From: Nelson Heringer <nelson.heringer(@mcgillassociates.com>
Sent: Wednesday, October 07, 2020 10:31 AM
To: Young, Brianna A <Brianna.Young(@ncdenr.gov>; Hennessy, John <iohn.hen nessy(@ncdenr.gov>
Cc: MJ Chen <mi.chenPmcgillassociates.com>
Subject: Re: [External] Wilkesboro WTP - NPDES Permit
F— External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to re�ortspamRnc.Eov
Brianna,

If you don't have any objections, let's shoot for Wednesday 10/14 at 2:00 PM. If MS Teams is
okay I will send out an invite.
Thanks,
Shoeing
ili
Communities
Together
Nelson Heringer, PE
Project Engineer
McGill Associates, P.A.
55 Broad Street, Asheville, NC 28801
From: Young, Brianna A <[e-mail]>
Sent: Wednesday, October 7, 2020 9:51 AM
To: Nelson Heringer <nelson.heringer(@mcgillassociates.com>; Hennessy, John
<iohn.hennessyla�ncdenr.gov>
Cc: MJ Chen <mj.chen(@mcgillassociates.com>
Subject: RE: [External] Wilkesboro WTP - NPDES Permit
Nelson,
Next week has better availability on our end. John and I are available Wednesday (10/14) afternoon,
Thursday (10/15) morning, and Friday (10/16) except 11am-12pm. Do you have any availability on
these days?
Thank you,
Brianna Young, MS
Environmental Specialist II
Compliance and Expedited Permitting Unit
Division of Water Resources
NC Department of Environmental Quality
Office: 919-707-3619
Brianna.Young&ncdenr.gov

Mailing address: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina Public Records Law and
may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental
Quality has adjusted operations to protect the health and safety of the staff and public. Many employees
are working remotely or are on staggered shifts. To accommodate these staffing changes, all DEQ office
locations are limiting public access to appointments only. Please check with the appropriate staff before
visiting our offices, as we may be able to handle your requests by phone or email. We appreciate your
patience as we continue to serve the public during this challenging time.
From: Nelson Heringer <nelson.heringer(@mcgillassociates.com>
Sent: Wednesday, October 07, 2020 9:40 AM
To: Young, Brianna A <Brianna.Young(@ncdenr.gov>; Hennessy, John <iohn.hen nessy(@ncdenr.gov>
Cc: MJ Chen <mi.chen(@mcgillassociates.com>
Subject: Re: [External] Wilkesboro WTP - NPDES Permit
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to reaort.spamPnc.gov
Brianna,
Regarding Number 4, the pilot study, is this required for all conventional WTP facilities? The
proposed ballasted flocculation process has not been constructed, therefore a pilot study
would not be possible. After the unit is constructed and in service, the waste stream will need
a place to go. Do you have availability this week or next to discuss via a conference call? I
think it may be the best way to all get on the same page and discuss all the application
requirements.
Thanks,
Nelson
From: Young, Brianna A <Brianna.Young(@ncdenr.gov>
Sent: Wednesday, October 7, 2020 8:32 AM
To: Nelson Heringer <nelson.heringer(@mcgillassociates.com>; Hennessy, John
<iohn.hennessyPncdenr.gov>
Cc: MJ Chen <mi.chen(@mcgillassociates.com>
Subject: RE: [External] Wilkesboro WTP - NPDES Permit
Thank you, Nelson. Below you will find a list of information required for a complete conventional
treatment WTP proposed discharge. Please let me know if you have any questions.

Attached are some items you will need to move forward with the application for a proposed Water
Treatment Plant with conventional treatment.
1. NC Short Form C for Water Treatment Plants - NPDES application (available online at
https://deq.nc.gov/about/divisions/water-resources/water-quality-permitting/nodes-
wastewater/npdes-permitting-process)
EAA Guidance — an Engineering Alternatives Analysis assessing other wastewater disposal
methods and costs must be submitted with all new permit applications. See the attached EAA
Guidance.
3. Discharges from conventional WTP's may perform a dilution study in accordance with EPA
Technical Guidance (https://www.epa.gov/nutrient-polic)l-data/technical-guidance-manual-
performing-waste-load-allocations-books), or provide 7Q10 information from USGS. It is best
to review any dilution model with a DWR staff member, the limiting parameter to be used in
the study, and what model runs should be submitted with the application. Note the maximum
discharge flow should be used in the model run.
4. In accordance with the NPDES WTP Permitting Strategy (attached), wastewater discharges
from conventional facilities shall demonstrate there will not be a significant impact to the
receiving stream. Therefore, a pilot study should be performed, and analysis performed on
the wastewater concentrate. See a list of parameters to analyze under item #6. In addition,
three Whole Effluent Toxicity tests should be conducted. The Permittee can conduct acute or
chronic whole effluent toxicity tests using ceriodaphnia dubia at a 90% effluent concentration
to be conservative, or if you have an estimate of dilution, perform chronic whole effluent tests
using ceriodaphnia dubia at multiple dilutions in the expected range to verify a passing
effluent. Test results should be submitted with the application. The Permittee can contact
Cindy Moore at the DWR Aquatic Toxicity Branch to confirm the appropriate test to perform
at 919-743-8442.
5. Please be sure to include the following items with the application:
• Describe the treatment processes for the raw water. Provide a schematic of flow
through the facility which includes flow volumes at all points in the water treatment
process. The plan should show the point[s] of addition for chemicals and all
discharges routed to the outfall.
Describe any wastewater treatment processes provided for the wastewater
generated by the facility.
0 The map with the receiving stream should identify exactly where the discharge (or

diffuser) will enter the stream (longitude and latitude). It should also outline the
path the discharge pipe will follow from the facility to the discharge point at the
stream.
6. Since this a proposed facility, the application should include:
• Analyses of source water collected (Baseline Raw Water Monitoring Data).
• Analysis of concentrate wastewaters from the Pilot Study for the following
parameters: Aluminum, Arsenic, Barium, Beta Particles, Calcium, Chloride, Copper,
Iron, Magnesium, Manganese, Ammonia -Nitrogen, Nitrogen -Nitrate + Nitrite, Total
Hardness (CaCO3), Total Phosphorus, Total Nitrogen [TN = TKN + (Nitrites +
Nitrates)], Total Dissolved Solids, Total Suspended Solids, Zinc, Lead, pH, Radium 226
& 228 (pCi/L), and Chronic Toxicity test(s) using ceriodaphnia dubia at 90% effluent
concentration or estimated dilution (or perform a multi -concentration test).
If available, submit data on Phosphate as P, Total Alkalinity (as CaCO3), Bicarbonate,
Carbonate, Hydroxide Alkalinity, Silica, Sulfate, and Sodium.
Brianna Young, MS
Environmental Specialist II
Compliance and Expedited Permitting Unit
Division of Water Resources
NC Department of Environmental Quality
Office: 919-707-3619
Brian na.Young(o)ncdenr.gov
Mailing address: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina Public Records Law and
may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental
Quality has adjusted operations to protect the health and safety of the staff and public. Many employees
are working remotely or are on staggered shifts. To accommodate these staffing changes, all DEQ office
locations are limiting public access to appointments only. Please check with the appropriate staff before
visiting our offices, as we may be able to handle your requests by phone or email. We appreciate your
patience as we continue to serve the public during this challenging time.
From: Nelson Heringer <nelson.heringer(@mcgillassociates.com>
Sent: Wednesday, October 07, 2020 8:17 AM
To: Young, Brianna A <Brianna.Young(@ncdenr.gov>; Hennessy, John <iohn.hen nessyPncdenr.gov>

Cc: MJ Chen <mj.chen(@mcgillassociates.com>
Subject: RE: [External] Wilkesboro WTP - NPDES Permit
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
Jachment to reoort.spam(cDnc.gov
Brianna,
Thank you for the information. The waste stream will be generated from a ballasted flocculation
unit. We will be utilizing a gravity thickener to separate the solid and liquid portion from this waste
stream. The solid portion will go to the existing sludge handling process and the liquid will be
discharged to surface waters via the proposed NPDES permit.
Thanks,
ilI9
Communities
Together
Nelson Heringer, PE
Project Engineer
McGill Associates, P.A.
55 Broad Street, Asheville, NC 28801
T 828.252.0575 x122
D 828.412.4596
nelson.heringer(d)mcgillassociates.com
mcgillassociates.com
From: Young, Brianna A <Brianna.YoungPncdenr.gov>
Sent: Wednesday, October 7, 2020 7:45 AM
To: Hennessy, John <iohn.hennessyCcDncdenr.gov>; Nelson Heringer
<nelson.heringerCcDmcgillassociates.com>
Cc: MJ Chen <mi.chenPmcgillassociates.com>
Subject: RE: [External] Wilkesboro WTP - NPDES Permit
Nelson,
Although this facility would look to use a previously permitted discharge pipe, as that permit was
rescinded due to the discharge being routed to a WWTP instead, we would require all information as
if it were a new outfall application. What type of treatment technology is used at the plant? I can
send you a list of required information based on that.
Thank you,
Brianna Young, MS
Environmental Specialist 11

Compliance and Expedited Permitting Unit
Division of Water Resources
NC Department of Environmental Quality
Office: 919-707-3619
Brianna.Younga-ncdenr.gov
Mailing address: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical address: 512 North Salisbury Street, Raleigh, NC 27604
Email correspondence to and from this address is subject to the North Carolina Public Records Law and
may be disclosed to third parties.
Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental
Quality has adjusted operations to protect the health and safety of the staff and public. Many employees
are working remotely or are on staggered shifts. To accommodate these staffing changes, all DEQ office
locations are limiting public access to appointments only. Please check with the appropriate staff before
visiting our offices, as we may be able to handle your requests by phone or email. We appreciate your
patience as we continue to serve the public during this challenging time.
From: Hennessy, John <john.hennessyPncdenr.gov>
Sent: Tuesday, October 06, 2020 4:51 PM
To: Nelson Heringer <nelson.heringer(@mcgillassociates.com>; Young, Brianna A
<Brianna.YoungPncdenr.gov>
Cc: MJ Chen <mj.chen(@mcgillassociates.com>
Subject: Re: [External] Wilkesboro WTP - NPDES Permit
Brianna Young on my staff is a good contact for your initial inquiry. She and I can discuss the
best person to process teh application when you get close to submitting it.
From: Nelson Heringer <nelson.heringer(@mcgillassociates.com>
Sent: Monday, October 5, 2020 2:03 PM
To: Hennessy, John <john.hennessy(@ncdenr.gov>
Cc: MJ Chen <mi.chenCcDmcgillassociates.com>
Subject: [External] Wilkesboro WTP - NPDES Permit
External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to reoort.spam(@nc.eov
John,
We are working with the Town of Wilkesboro on an improvements project for their WTP. Part of
this project will include resuming discharge to surface waters via a now expired NPDES Permit
(NC0055590). We are currently preparing an application for a new individual NPDES permit. The
current plan is to reutilize the same outfall pipe used for the previous discharge. As we prepare this
application, I wanted to reach out and confirm how much information your office would require on
the existing discharge pipe.

Feel free to give me a call if you want to discuss further.
Thanks,
McgiliTogether
Nelson Heringer, PE
Project Engineer
McGill Associates, P.A.
55 Broad Street, Asheville, NC 28801
T 828.252.0575 x122
D 828.412.4596
nelson.heringer(o)mcgillassociates.com
mcgil lassociates.com