NC0084573_Fact Sheet_20210811

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
This form must be completed by Permit Writers for all expedited permits which do not require
full Fact Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile
home parks, etc) that can be administratively renewed with minor changes, but can include
facilities with more complex issues (Special Conditions, 303(d) listed water, toxicity testing,
instream monitoring, compliance concerns).
Basic Information for Ex edited Permit Renewals
Permit Writer / Date
Brianna Young 8/11/2021
Permit Number
NC0084573
Facility Name / Facility Class
Lincoln County WTP / PC-1
Basin Name / Sub -basin number
Catawba / 03-08-32
Receiving Stream / HUC
Catawba River (Lake Norman below
elevation 760) / Lake Norman (Little Creek
Arm)/030501011202
Stream Classification / Stream Segment
WS-IV, B; CA / 11-(75)
Does permit need Daily Maximum NH3
limits?
N/A
Does permit need TRC limits/language?
Already present
Does permit have toxicity testing? IWC (%) if
so
Yes; IWC = 90%
Does permit have Special Conditions?
No
Does permit have instream monitoring?
Yes — upstream hardness
Is the stream impaired (on 303(d) list)?
Yes — PCB fish tissue advisory
Any obvious compliance concerns?
No
Any permit mods since last permit?
Yes — in the process of expanding
New expiration date
3/31/2025
Comments on Draft Permit?
Yes — See Section 7 below
Section 1. Facility Overview:
The Lincoln County WTP operates a conventional WTP currently designed for a potable
flowrate of 3.99 MGD. The facility generates backflow intermittently (daily for 2 hours).
The maximum, monthly average discharge between May 2018 to April 2021 was
approximately 0.246 MGD. This facility is in the process of expanding from 3.99 MGD
potable flowrate to 8.0 MGD potable flowrate with a wastewater discharge of 0.09 MGD.
Section 2. Compliance History (2016-2021):
• 1 NOV for TRC daily max exceedance
• Failed 1 of the last 12 toxicity tests (passed the last 4 tests)
Page 1 of 9

303(d) listing:
111-175)
'CATAWBA RIVER (Lake Norman below elevation 760)
From Lyle Creek to Cowan's Ford Dam
Classification
WS-IV,B;CA
Length or Area
L 31,332IUnit5
FW Acres
Previous AU Number
Assessment Criteria Status Reason for Rating
Exceeding Criteria
Fish Consumption Advisory
Parameter of Interest i
PCB Fish Tissue Advisory (Advisory, FC, NC)
Category
Section 3. RPA:
The maximum monthly average flow between May 2018 to April 2021 was
approximately 0.246 MGD.
• Aluminum — No RPA required; Monitoring maintained at quarterly as facility has
potential to discharge
• Manganese — No RPA; Monitoring maintained at quarterly as discharge is to WS-
class waters (per 2012 WTP guidance)
• Fluoride — No RP; Quarterly monitoring maintained as facility is undergoing
expansion
• Copper — No RP; Quarterly monitoring maintained as facility is undergoing
expansion
Section 4. NCG590000 General Permit Eligibility:
• They use conventional/greensand technology, therefore they are eligible
• They have passed 11 of the last 12 tox tests, therefore they are eligible by tox
standards
• They have passed last 4 tox tests, therefore they are eligible by tox standards
• They do not discharge to HQW or ORW waters, therefore they are eligible
• They do not have limits for any parameters, therefore they are eligible
• Facility is in the middle of an expansion; Would prefer to see monitoring data
after expansion is complete to ensure there are no concerns, therefore they are not
eligible
• Conclusion: They are not eligible for the NCG59
Section 5. Changes from previous permit to draft:
• Updated eDMR footnote in A(1) and language in A(3)
• Updated outfall map
• Added facility grade in A(1)
• Added components list on Supplement to Permit Cover Sheet
• Added language about facility expansion on Supplement to Permit Cover Sheet
• Updated language on the Supplement to Permit Cover Sheet
• Added units of measure in A(1)
• Duration of discharge monitoring added in A(1) per current WTP guidance as
facility has instantaneous flow monitoring
Page 2 of 9

• Turbidity monitoring reduced to monthly in A(1) per 2012 WTP guidance
• Removed former footnote #3 stating "Monitoring should be performed in
conjunction with toxicity testing" as this is no longer required
• Added hardness footnotes in A(1)
• Updated tox test in A(1) and associated language in A(2) as per 2012 toxicity
guidance
• Removed former A(3) WET reopener as facility has a good toxicity history the
last 3 years
Section 6. Changes from draft to final:
• Changed flow monitoring to continuous with compliance schedule to allow the
permittee time to connect their SCADA system
Section 7. Comments received on draft permit:
• Zach Thomas (ATB; via email 6/22/21): We currently have this facility in our
database as testing for Grab Acute Fathead 24-Hr P/F @ 90% monitoring only. It
appears that this draft permit will be switching them to Grab Chronic Cerio 7-day
P/F @ 0.63% monitoring only. Is this switch to simply get them back in line with
the tox sampling guidance?
o DWR Response: Yes, you are correct. The switch is to get the permit in
line with the 2012 aquatic toxicity guidance memo since the facility is
meets the requirements for chronic testing.
o ATB Response: Everything else for Tox looks good.
• Adam Jolicoeur (Lincoln County; via email 7/6/21):
o #7) Changes to the duration of discharge monitoring- just so I am clear
what is this specificity referring to in the footnotes? Maybe I overlooked
it?
• DWR response: This is not referring to any items in the footnotes,
it is referring to the effluent table itself in Section A. (1) of the
permit. In the second row of the effluent table, there is a line where
monitoring for "Duration of Discharge" is required.
• Adam Jolicoeur response: We have a continuous discharge flow
meter that is calibrated annually. We discharge intermittently
throughout a 24 hour period (Avg. 170,000 per day) and timing
each discharge would be difficult to say the least. I am requesting
that the duration of discharge monitoring be removed.
• DWR response: As you have a continuous flow meter installed at
the facility, if you are alright with the flow measurement frequency
being changed to Continuous (instead of weekly) and the sample
type changed to Recording (instead of instantaneous), then we will
approve removing the Duration of Discharge monitoring
requirement.
• Adam Jolicoeur response: We currently record our discharge
flow daily, so the continuous would not be an issue, but concerning
the "Recording", we don't have our discharge flow meter
Page 3 of 9

connected to our Scada system. If you are requiring us to record
flows from Scada, or show hourly graph flow discharge totals, we
are currently unable to comply with this portion. After discussing it
with Wes Bell, if the latter part it an issue, we can stay with
instantaneous, and possible upgrade during the next permit?
• DWR response: To confirm, are you indicating you are willing to
keep instantaneous monitoring with the duration of discharge
monitoring requirement as well? Our policies require that
instantaneous reporting also have duration be reported.
• Adam Jolicoeur response: I have worked it out with our
subcontractors and we should be able to have the discharge flow
meter connected to Scada, at a reasonable cost. They could begin
the work by the end of the month.
o Whole Effluent Toxicity- this had been changed from us using Pimephales
promelas to Ceriodaphnia. What is the reason for the change? We have
been doing well with Pimephales promelas, would it be possible continue
with their use? I did see where it was changed from 90 percent to 63
percent mortality.
• DWR response: This update was made to follow current guidance
from the Aquatic Toxicology Branch on proper WET testing. If
you have any questions on toxicity testing, please reach out to
Cindy Moore ([e-mail]) or Zach Thomas
([e-mail]).
o See second attachment, on page 7 of 9, under Note, it indicates failure to
achieve test conditions shall constitute an invalid test and will require
immediate follow-up testing. Since we are monitor and report only, could
this be removed?
• DWR response: This is standard language provided by the
Aquatic Toxicology Branch, therefore it cannot be removed. If you
have any questions on toxicity testing, please reach out to Cindy
Moore ([e-mail]) or Zach Thomas
([e-mail]).
• Clinton Cook (PWS; via email 7/22/21): Please note that there are numerous
downstream raw water intakes for public water systems. In fact, three intakes are
located on Lake Norman and serve the City of Charlotte, Town of Mooresville
and Lincoln County. The Lincoln County intake is adjacent to outfall.
Page 4 of 9

NPDES Implementation of Instream Dissolved Metals Standards - Freshwater
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, metal 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 2B.0200 (e.g., arsenic at 10
µg/1 for human health protection; cyanide at 5 µg/L and fluoride at 1.8 mg/L for
aquatic life protection).
Table 2. Dissolved Freshwater Standards for Hardness -Dependent Metals
The Water Effects Ratio (WER) is equal to one unless determined otherwise
under 15A NCAC 02B .0211 Subparagraph (11)(d)
Metal
NC Dissolved Standard, µg/1
Cadmium, Acute
WER*{1.136672-[ln hardness](0.041838)} • e^{0.9151 [In hardness]-3.1485}
Cadmium, Acute Trout waters
WER*{1.136672-[In hardness](0.041838)} • e^{0.9151[ln hardness]-3.6236}
Cadmium, Chronic
WER*{1.101672-[ln hardness](0.041838)} • e^{0.7998[ln hardness]-4.4451}
Chromium III, Acute
WER*0.316 • e^{0.8190[ln hardness]+3.7256}
Chromium III, Chronic
WER*0.860 • e^{0.8190[ln hardness]+0.6848}
Page 5 of 9

Copper, Acute
WER*0.960 • e^{0.9422[ln hardness]-1.700}
Copper, Chronic
WER*0.960 • e^{0.8545[ln hardness]-1.702}
Lead, Acute
WER*{1.46203-[ln hardness](0.145712)} • e^{1.273[ln hardness]-1.460}
Lead, Chronic
WER*{1.46203-[ln hardness](0.145712)} • e^{1.273[ln hardness]-4.705}
Nickel, Acute
WER*0.998 • e^{0.8460[ln hardness]+2.255}
Nickel, Chronic
WER*0.997 • e^{0.8460[ln hardness]+0.0584}
Silver, Acute
WER*0.85 • e^{1.72[ln hardness]-6.59}
Silver, Chronic
Not applicable
Zinc, Acute
WER*0.978 • e^{0.8473[ln hardness]+0.884}
Zinc, Chronic
WER*0.986 • e^{0.8473[ln hardness]+0.884}
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 and hardness -dependent standards requires
additional consideration in order to establish the numeric standard for each metal of
concern of each individual discharge.
The hardness -based standards require some knowledge of the effluent and instream
(upstream) hardness and so must be calculated case -by -case for each discharge.
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 default translator values
developed for each metal (more on that below), but it is also possible to consider case -
specific translators developed in accordance with established methodology.
RPA Permitting Guidance/WQBELs for Hardness -Dependent Metals - Freshwater
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 critical low -flow values for the
receiving stream.
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 on the Freshwater hardness -dependent metals the Permit
Writer compiles the following information:
Page 6 of 9

• Critical low flow of the receiving stream, 7Q10 (the spreadsheet
automatically calculates the 1Q10 using the formula 1Q10 = 0.843
(s7Q10, cfs) 0.993
• Effluent hardness and upstream hardness, site -specific data is preferred
• Permitted flow
• Receiving stream classification
2. In order to establish the numeric standard for each hardness -dependent metal of
concern and for each individual discharge, the Permit Writer must first determine
what effluent and instream (upstream) hardness values to use in the equations.
The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test
results for any hardness data and contacts the Permittee to see if any additional
data is available for instream hardness values, upstream of the discharge.
If no hardness data is available, the permit writer may choose to do an initial
evaluation using a default hardness of 25 mg/L (CaCO3 or (Ca + Mg)).
Minimum and maximum limits on the hardness value used for water quality
calculations are 25 mg/L and 400 mg/L, respectively.
If the use of a default hardness value results in a hardness -dependent metal
showing reasonable potential, the permit writer contacts the Permittee and
requests 5 site -specific effluent and upstream hardness samples over a period of
one week. The RPA is rerun using the new data.
The overall hardness value used in the water quality calculations is calculated as
follows:
Combined Hardness (chronic)
= (Permitted Flow, cfs *Avg. Effluent Hardness, mg/L) x (s7Q10, cfs *Avg. Upstream
Hardness, mg/L)
(Permitted Flow, cfs + s7Q10, cfs)
The Combined Hardness for acute is the same but the calculation uses the 1Q10
flow.
3. The permit writer converts the numeric standard for each metal of concern to a
total recoverable metal, using the EPA Default Partition Coefficients (DPCs) or
site -specific translators, if any have been developed using federally approved
methodology.
Page 7 of 9

EPA default partition coefficients or the "Fraction Dissolved" converts the
value for dissolved metal at laboratory conditions to total recoverable metal
at in -stream ambient conditions. This factor is calculated using the linear
partition coefficients found in The Metals Translator: Guidance for
Calculating a Total Recoverable Permit Limit from a Dissolved Criterion
(EPA 823-B-96-007, June 1996) and the equation:
Cdiss =
Ctotal
1
1 + { [Kpo] [SSUU+a)] [10-6] }
Where:
ss = in -stream suspended solids concentration [mg/1], minimum of 10 mg/L
used, and
Kpo and a = constants that express the equilibrium relationship between
dissolved and adsorbed forms of metals. A list of constants used for each
hardness -dependent metal can also be found in the RPA program under a
4. The numeric standard for each metal of concern is divided by the default partition
coefficient (or site -specific translator) to obtain a Total Recoverable Metal at
ambient conditions.
In some cases, where an EPA default partition coefficient translator does not exist
(ie. silver), the dissolved numeric standard for each metal of concern is divided by
the EPA conversion factor to obtain a Total Recoverable Metal at ambient
conditions. This method presumes that the metal is dissolved to the same extent as
it was during EPA's criteria development for metals. For more information on
conversion factors see the June, 1996 EPA Translator Guidance Document.
5. 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) (Cwqs) — (s7Q10) (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 NH3*
(µg/L or mg/L)
Qw = permitted effluent flow (cfs, match s7Q10)
s7Q10 = summer low flow used to protect aquatic life from chronic toxicity
and human health through the consumption of water, fish, and shellfish from
noncarcinogens (cfs)
* Discussions are on -going with EPA on how best to address background
concentrations
Flows other than s7Q10 may be incorporated as applicable:
1 Q 10 = used in the equation to protect aquatic life from acute toxicity
Page 8 of 9

QA = used in the equation to protect human health through the
consumption of water, fish, and shellfish from carcinogens
30Q2 = used in the equation to protect aesthetic quality
6. 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.
7. 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.
8. The Total Chromium NC WQS was removed and replaced with trivalent
chromium and hexavalent chromium Water Quality Standards. As a 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 III or VI. In these
cases, the projected maximum concentration (95th %) for total chromium will be
compared against water quality standards for chromium III and chromium VI.
9. Effluent hardness sampling and instream hardness sampling, upstream of the
discharge, are inserted into all permits with facilities monitoring for hardness -
dependent metals to ensure the accuracy of the permit limits and to build a more
robust hardness dataset.
10. Hardness and flow values used in the Reasonable Potential Analysis for this
permit included:
Parameter
Value
Comments (Data Source)
Average Effluent Hardness
(mg/L)
[Total as, CaCO3 or (Ca+Mg)]
14
BIMS
Average Upstream Hardness
(mg/L)
[Total as, CaCO3 or (Ca+Mg)]
13
BIMS
7Q10 summer (cfs)
60
BIMS
1 Q 10 (cfs)
49.15
RPA
Permitted Flow (MGD)
0.2456
BIMS
Page 9 of 9

LINCOLN TIMES -NEWS
P.O. Box 40
Lincolnton, North Carolina 28093-0040
Telephone [phone]
I, Jerry Leedy, Publisher of the Lincoln Times -News, do hereby acknowledge that the
attached advertisement was published in the Lincoln Times -News on the following
Dates: June 25, 2021
This is the 25th of June, 2021.
4s1,6z-60)--
WITNESS
,,`�„, P RNOT Y ' ublisher
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My Commission Expires: 05/19/2022 Copy

Public Notice
North Carolina Environmental Management
Commission/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a NPDES
Wastewater Permit NC00254% City
of Lincointon WWTP and NC00S4573
Linc, In County WTP The North Carolina
Environmental Management Commission
proposes to issue a NPDES wastewater
discharge permit to the person(s) listed below.
Written comments regarding the proposed
permit will be accepted until 30 days after the
publish date of this notice. The Director of
the NC Division of Water Resources (DWR)
may hold a public hearing should there be a
significant degree of public interest. Please
mail comments and/or information requests to
DWR at the above address. Interested persons
may visit the DWR at 512 N. Salisbury Street,
Raleigh, NC 27604 to review information
on file. Additional information on NPDES
permits and this notice may be found on our
website: http://deq.nc.gov/about/divisions/
water-resources/water-resources-permits/
wastewater-branch/npdes-wastewater/public-
notices,or by calling [phone]. The City
of Lincolnton (P.O. Box 617, Lincolnton, NC
28093) has requested renewal of the NPDES
Permit NC0025496 for its Wastewater
Treatment Plant in Lincoln County. This
permitted facility discharges treated domestic
and pretreated industrial wastewater to
South Fork Catawba River in the Catawba
River Basin. Ammonia, biochemical oxygen
demand, bis (2-ethylhexyl) phthalate,
dissolved oxygen, fecal coliform, pH, total
residual chlorine, and total suspended solids
are water quality limited parameters in the
permit. This discharge may affect future
allocations in this segment of the South Fork
Catawba River. Lincoln County [115 W
Main Street] has requested renewal of permit
NC0084573 for its WTP in Lincoln County.
This permitted facility discharges filter
backwash and sludge supertenant wastewater
to Lake Norman (Little Creek Arm) in the
Catawba River Basin. Currently total residual
chlorine and total suspended solids parameters
are water quality limited. This discharge may
affect future allocations in this segment of
Lake Norman.
1 T: June 25, 2021

Young, Brianna A
From: Cook, Clinton
Sent: Thursday, July 22, 2021 2:19 PM
To: Young, Brianna A
Subject: RE: Draft NPDES Permit NC0084573
Attachments: NC0084573 PWS memo (COC).pdf
Brianna,
Thanks for the email. I have attached my response.
Please note that there are numerous downstream raw water intakes for public water systems. In fact, three intakes are
located on Lake Norman and serve the City of Charlotte, Town of Mooresville and Lincoln County. The Lincoln County
intake is adjacent to outfall.
Please also let me know if you have any questions or need any additional information.
Thanks,
Clint
Clinton O. Cook, PE
Regional Engineer
Division of Water Resources — Public Water Supply Section
North Carolina Department of Environmental Quality
704 663 1699 office
704 663 6040 fax
clinton.cook©ncdenr.gov
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Young, Brianna A <[e-mail]>
Sent: Tuesday, June 22, 2021 9:06 AM
To: Cook, Clinton <[e-mail]>
Subject: Draft NPDES Permit NC0084573
Good morning,
The draft NPDES permit for the Lincoln County WTP (NC0084573) has been submitted for public notice. Please fill out
and return the attached form by July 22nd
Thank you,
Brianna Young, MS (she/her)
Environmental Specialist II
1

ROY COOPER
Governor
JOHN NICHOLSON
Interim Secretory
S. DANIEL SMITH
Director
MEMORANDUM
To:
NORTH CAROLINA
Environmental Quality
June 22, 2021
Clinton Cook
NC DEQ / DWR / Public Water Supply
Mooresville Regional Office
From: Brianna Young
Compliance and Expedited Permitting Unit
Subject: Review of Draft NPDES Permit NC0084573
Lincoln County WTP
Lincoln County
Please indicate below your agency's position or viewpoint on the draft permit and return this form by
July 22, 2021. If you have any questions on the draft permit, please contact me at 919-707-3619 or via
e-mail [[e-mail]].
RESPONSE: (Check one)
X
§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§
Concur with the issuance of this permit provided the facility is operated and maintained properly,
the stated effluent limits are met prior to discharge, and the discharge does not contravene the
designated water quality standards.
Concurs with issuance of the above permit, provided the following conditions are met: *
* I have no appreciable expertise in implementation of the Clean Water Act requirements and have
minimal understanding of the information provided. As a result, I have no basis for opposing the
permit.
Opposes the issuance of the above permit, based on reasons stated below, or attached:
ak56.,,
Signed: Date: July 22, 2021
NO DE
Dep. Mart al �rl wunenhl uueHh�
North Carolina Department of Environmental Quality j Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
919.707.9000

Young, Brianna A
From: Thomas, Zachary T
Sent: Tuesday, June 22, 2021 2:02 PM
To: Young, Brianna A
Subject: RE: Draft NPDES Permit NC0084573
Perfect, Thanks!
Everything else for Tox looks good.
Thank you,
Zach Thomas
Environmental Specialist II
Aquatic Toxicology Branch
NCDEQ— Division of Water Resources
919-743-8439
Submit ATForms electronically to: [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: Young, Brianna A
Sent: Tuesday, June 22, 2021 12:41 PM
To: Thomas, Zachary T <[e-mail]>
Subject: RE: Draft NPDES Permit NC0084573
Yes, you are correct. The switch is to get the permit in line with the 2012 aquatic toxicity guidance memo since the
facility is meets the requirements for chronic testing.
Brianna Young, MS (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
NC DEQ/ Division of Water Resources
Office: 919-707-3619
[e-mail] (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.
i

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: Thomas, Zachary T <[e-mail]>
Sent: Tuesday, June 22, 2021 12:37 PM
To: Young, Brianna A <[e-mail]>
Subject: RE: Draft NPDES Permit NC0084573
Hi Brianna,
We currently have this facility in our database as testing for Grab Acute Fathead 24-Hr P/F @ 90% monitoring only.
It appears that this draft permit will be switching them to Grab Chronic Cerio 7-day P/F @ 0.63% monitoring only.
Is this switch is to simply get them back in line with the tox sampling guidance?
Thank you,
Zach Thomas
Environmental Specialist II
Aquatic Toxicology Branch
NCDEQ— Division of Water Resources
919-743-8439
Submit ATForms electronically to: [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: Young, Brianna A
Sent: Tuesday, June 22, 2021 9:06 AM
To: Thomas, Zachary T <[e-mail]>; Moore, Cindy <[e-mail]>
Subject: Draft NPDES Permit NC0084573
Good morning,
The draft NPDES permit for the Lincoln County WTP (NC00845723) has been submitted for public notice. Please provide
any comments by July 22na
Thank you,
Brianna Young, MS (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
NC DEQ/ Division of Water Resources
2

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
rREQUIRED DATA ENTRY
Table 1. Project Information
Facility Name
WWTP/WTP Class
NPDES Permit
Outfall
Flow, Qw (MGD)
Receiving Stream
HUC Number
Stream Class
❑ CHECK IF HQW OR ORW WQS
Lincoln County WTP
PC-1
NC0084573
001
0.246
Catawba River (Lake Norman below elevation 760)
030501011202
❑ Apply WS Hardness WQC
7Q10s (cfs)
7Q1Ow (cfs)
30Q2 (cfs)
QA (cfs)
1Q10s (cfs)
WS-IV, B; CA
60.00
0.00
0.00
60.00
49.15
Effluent Hardness
14.14 mg/L (Avg)
Upstream Hardness
13.26 mg/L (Avg)
Combined Hardness Chronic
25 mg/L
Combined Hardness Acute
25 mg/L
Data Source(s)
❑ CHECK TO APPLY MODEL
Table 2. Parameters of Concern
Par01
Par02
Par03
Par04
Par05
Par06
Par07
Par08
Par09
Par10
Par11
Par12
Par13
Par14
Par15
Par16
Par17
Par18
Par19
Par20
Par21
Par22
Par23
Par24
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
4 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
NC0084573 RPA - Freshwater, input
8/11/2021

REASONABLE POTENTIAL ANALYSIS
H1
Effluent Hardness
Date Data BDL=1/2DL Results
1 6/6/2017 18 18 Std Dev.
2 9/11/2017 12 12 Mean
3 12/4/2017 14 14 C.V.
4 3/5/2018 16 16 n
5 6/6/2018 16 16 10th Per value
6 9/13/2018 12 12 Average Value
7 12/3/2018 8 8 Max. Value
8 3/4/2019 10 10
9 6/3/2019 12 12
10 9/9/2019 18 18
11 12/3/2019 20 20
12 3/3/2020 20 20
13 6/4/2020 16 16
14 9/14/2020 10 10
15 12/7/2020 8.2 8.2
16 3/2/2021 16 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
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
H2
Upstream Hardness
3.9441
14.1375
0.2790
16
9.10 mg/L
14.14 mg/L
20.00 mg/L
Date Data BDL=1/2DL Results
1 6/6/2017 14 14 Std Dev.
2 9/11/2017 12 12 Mean
3 12/4/2017 14 14 C.V.
4 3/5/2018 16 16 n
5 6/6/2018 12 12 10th Per value
6 9/13/2018 10 10 Average Value
7 12/3/2018 10 10 Max. Value
8 3/4/2019 16 16
9 6/3/2019 14 14
10 9/9/2019 14 14
11 12/3/2019 18 18
12 3/3/2020 18 18
13 6/4/2020 12 12
14 9/14/2020 8.1 8.1
15 12/7/2020 10 10
16 3/2/2021 14 14
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
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
2.8978
13.2563
0.2186
16
10.00 mg/L
13.26 mg/L
18.00 mg/L
NC0084573 RPA - Freshwater, data
- 2 - 8/11/2021

REASONABLE POTENTIAL ANALYSIS
Pall
Copper
Date Data BDL=1/2DL Results
1 12/6/2016 1 1 Std Dev.
2 3/7/2017 1 1 Mean
3 6/6/2017 2 2 C.V.
4 9/11/2017 1 1 n
5 12/4/2017 2 2
6 3/5/2018 1 1 Mult Factor =
7 6/6/2018 2 2 Max. Value
8 9/13/2018 1 1 Max. Pred Cw
9 12/3/2018 < 10 5
10 3/4/2019 < 5 2.5
11 6/3/2019 < 3 1.5
12 9/9/2019 3 3
13 12/3/2019 < 2 1
14 3/3/2020 < 2 1
15 6/4/2020 < 2 1
16 9/14/2020 < 2 1
17 12/7/2020 < 2 1
18 3/2/2021 < 2 1
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
Par13
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
1.0510
1.6111
0.6523
18
1.45
5.00 ug/L
7.25 ug/L
Fluoride
Date Data BDL=1/2DL Results
Use"PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
1 12/6/2016 < 100 50 Std Dev. 68.0182
2 3/7/2017 < 100 50 Mean 85.0000
3 6/6/2017 < 100 50 C.V. 0.8002
4 9/11/2017 230 230 n 18
5 12/4/2017 180 180
6 3/5/2018 220 220 Mult Factor = 1.55
7 6/6/2018 200 200 Max. Value 230.0 ug/L
8 9/13/2018 < 100 50 Max. Pred Cw 356.5 ug/L
9 12/3/2018 < 100 50
10 3/4/2019 < 100 50
11 6/3/2019 < 100 50
12 9/9/2019 < 100 50
13 12/3/2019 < 100 50
14 3/3/2020 < 100 50
15 6/4/2020 < 100 50
16 9/14/2020 < 100 50
17 12/7/2020 < 100 50
18 3/2/2021 < 100 50
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
NC0084573 RPA - Freshwater, data
- 3 - 8/11/2021

Lincoln County WTP
NC0084573
Qw (MGD) = 0.2456
1Q10S(cfs)= 49.15
7Q1OS (cfs) = 60.00
7Q1OW (cfs) = 0.00
30Q2 (cfs) = 0.00
Avg. Stream Flow, QA (cfs) = 60.00
Receiving Stream: Catawba River (Lake
PARAMETER
Copper
Fluoride
TYPE
NC
NC
Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
WWTP/WTP Class: PC-1
IWC% @ 1Q10S = 0.768677645
IWC% @ 7Q1OS = 0.630551587
IWC% @ 7Q1OW = 100
IWC% @ 30Q2 = 100
IW%C @ QA = 0.630551587
Stream Class: WS-IV, B; CA
Norman below elevation 760) HUC
NC STANDARDS OR EPA CRITERIA
Chronic
Applied
Standard
Acute
7.8806 FW(7Q10s) 10.4720
1800 FW(7Q10s)
0.
a
1
z
ug/L
ug/L
REASONABLE POTENTIAL RESULTS
ri # Det. Max Pred Cw
18 9
18 4
7.25
356.5
Allowable Cw
Acute: 1,362.34
Chronic: 1,249.80
No value > Allowable Cw
Acute: NO WQS
Chronic: 285,464.4
No value > Allowable Cw
Outfall 001
Qw = 0.24563333 MGD
COMBINED HARDNESS (mg/L)
Acute = 25 mg/L
Chronic = 25 mg/L
YOU HAVE DESIGNATED THIS RECEIVING
STREAM AS WATER SUPPLY
Effluent Hard: 0 value > 100 mg/L
14.14 mg/L (Avg)
RECOMMENDED ACTION
Page 4 of 49
NC0084573 RPA - Freshwater, rpa
8/11/2021

NH3/TRC WLA Calculations
Facility: Lincoln County WTP
PermitNo. NC0084573
Prepared By: Brianna Young
Enter Design Flow (MGD):
Enter s7Q10 (cfs):
Enter w7Q10 (cfs):
0.245633
60
0
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/I)
s7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
Upstream Bkgd (ug/I)
IWC (%)
Allowable Conc. (ug/I)
Fecal Coliform
Monthly Average Limit:
(If DF >331; Monitor)
(If DF<331; Limit)
Dilution Factor (DF)
60
0.245633
0.380732
17.0
0
0.63
2696
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/I)
s7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
Upstream Bkgd (mg/I)
IWC (%)
Allowable Conc. (mg/I)
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/I)
w7Q10 (CFS)
200/100m1 DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
158.59 Upstream Bkgd (mg/I)
IWC (%)
Allowable Conc. (mg/I)
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/I, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals)
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis)
If the allowable ammonia concentration is > 35 mg/L, no limit shall be imposed
60
0.24563
0.38073
1.0
0.22
0.63
123.9
0
0.24563
0.38073
1.8
0.22
100.00
1.8
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)

Young, Brianna A
From: Adam Jolicoeur <[e-mail]>
Sent: Monday, August 9, 2021 8:36 AM
To: Young, Brianna A
Cc: Bell, Wes; 'Donald V. Chamblee, Jr.'; Chris Henderson
Subject: RE: [External] Draft Question NPDES Permit #NC0084573
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Brianna,
Good morning. I have worked it out with our subcontractors and we should be able to have the discharge flow
meter connected to Scada, at a reasonable cost. They could begin the work by the end of the month.
Regards,
Adam
From: Young, Brianna A <[e-mail]>
Sent: Thursday, July 29, 2021 8:30 AM
To: Adam Jolicoeur <[e-mail]>
Cc: Bell, Wes <[e-mail]>; 'Donald V. Chamblee, Jr.' <[e-mail]>
Subject: RE: [External] Draft Question NPDES Permit #NC0084573
CAUTION: This Email is from an EXTERNAL source. Ensure you trust this sender before clicking on any links or
attachments.
Good morning Adam,
I have spoken with my supervisor, John Hennessy, regarding your request. As you have a continuous flow meter installed
at the facility, if you are alright with the flow measurement frequency being changed to Continuous (instead of weekly)
and the sample type changed to Recording (instead of instantaneous), then we will approve removing the Duration of
Discharge monitoring requirement. Please let me know.
Thank you,
Brianna Young, MS (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
NC DEQ/ Division of Water Resources
[e-mail] (e-mail preferred during State of Emergency)
919-707-3619 (office)
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
1

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: Adam Jolicoeur <[e-mail]>
Sent: Friday, July 16, 2021 9:37 AM
To: Young, Brianna A <[e-mail]>
Cc: Bell, Wes <[e-mail]>; 'Donald V. Chamblee, Jr.' <[e-mail]>
Subject: RE: [External] Draft Question NPDES Permit #NC0084573
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Ok, thank you. Have a good weekend.
Regards,
Adam
From: Young, Brianna A <[e-mail]>
Sent: Friday, July 16, 2021 9:36 AM
To: Adam Jolicoeur <[e-mail]>
Cc: Bell, Wes <[e-mail]>; Donald V. Chamblee, Jr. <[e-mail]>
Subject: RE: [External] Draft Question NPDES Permit #NC0084573
CAUTION: This Email is from an EXTERNAL source. Ensure you trust this sender before clicking on any links or
attachments.
Hello Adam,
Yes, I did receive your email. I need to speak with my supervisor concerning your request. I will reach back out to you
when a decision is made.
Thank you,
Brianna Young, MS (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
NC DEQ/ Division of Water Resources
[e-mail] (e-mail preferred during State of Emergency)
919-707-3619 (office)
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.
2

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: Adam Jolicoeur <[e-mail]>
Sent: Friday, July 16, 2021 8:12 AM
To: Young, Brianna A <[e-mail]>
Cc: Bell, Wes <[e-mail]>; Donald V. Chamblee, Jr. <[e-mail]>
Subject: [External] Draft Question NPDES Permit #NC0084573
Importance: High
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Ms. Young,
I was following up on the question below, it may have gotten overlooked between emails.
Regards,
Adam
From: Adam Jolicoeur <[e-mail]>
Sent: Tuesday, July 13, 2021 10:22 AM
To: 'Young, Brianna A' <[e-mail]>
Cc: 'Bell, Wes' <[e-mail]>; '[e-mail]' <[e-mail]>;
'[e-mail]' <[e-mail]>; Donald V. Chamblee, Jr.
<[e-mail]>
Subject: RE: [External] FW: Draft NPDES Permit #NC0084573- Questions
Importance: High
Ms. Young,
We have a continuous discharge flow meter that is calibrated annually. We discharge intermittently throughout
a 24 hour period, timing each discharge would be difficult to say the least. I am requesting that the duration of
discharge monitoring be removed.
Regards,
Adam
From: Young, Brianna A <[e-mail]>
Sent: Tuesday, July 13, 2021 9:21 AM
To: Adam Jolicoeur <[e-mail]>
Cc: Bell, Wes <[e-mail]>
Subject: RE: [External] FW: Draft NPDES Permit #NC0084573- Questions
CAUTION: This Email is from an EXTERNAL source. Ensure you trust this sender before clicking on any links or
attachments.
3

Yes, the length of time each discharge occurs will need to be reported.
Brianna Young, MS (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
NC DEQ/ Division of Water Resources
[e-mail] (e-mail preferred during State of Emergency)
919-707-3619 (office)
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: Adam Jolicoeur <[e-mail]>
Sent: Tuesday, July 13, 2021 9:16 AM
To: Young, Brianna A <[e-mail]>
Cc: Bell, Wes <[e-mail]>
Subject: RE: [External] FW: Draft NPDES Permit #NC0084573- Questions
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Ok, I will contact Cindy and Zachary. But I am still unsure what is being asked as for duration? Will the new
permit require a time of how long we discharge? Could you please clarify.
Thank you,
Adam
From: Young, Brianna A <[e-mail]>
Sent: Tuesday, July 13, 2021 8:42 AM
To: Adam Jolicoeur <[e-mail]>
Cc: Bell, Wes <[e-mail]>
Subject: RE: [External] FW: Draft NPDES Permit #NC0084573- Questions
CAUTION: This Email is from an EXTERNAL source. Ensure you trust this sender before clicking on any links or
attachments.
Good morning Adam,
Yes, I did receive your email. I apologize for not responding as it got lost in the shuffle. Please see below for responses to
your questions.
4

#7) Changes to the duration of discharge monitoring- just so I am clear what is this specificity referring
to in the footnotes? Maybe I overlooked it?
This is not referring to any items in the footnotes, it is referring to the effluent table itself in Section A. (1) of
the permit. In the second row of the effluent table, there is a line where monitoring for "Duration of Discharge"
is required.
Whole Effluent Toxicity- this had been changed from us using Pimephales promelas to Ceriodaphnia.
What is the reason for the change? We have been doing well with Pimephales promelas, would it be
possible continue with their use? I did see where it was changed from 90 percent to 63 percent mortality.
This update was made to follow current guidance from the Aquatic Toxicology Branch on proper WET testing.
If you have any questions on toxicity testing, please reach out to Cindy Moore ([e-mail]) or Zach
Thomas ([e-mail]).
See second attachment, on page 7 of 9, under Note, it indicates failure to achieve test conditions shall
constitute an invalid test and will require immediate follow-up testing. Since we are monitor and report
only, could this be removed?
This is standard language provided by the Aquatic Toxicology Branch, therefore it cannot be removed. If you have any
questions on toxicity testing, please reach out to Cindy Moore ([e-mail]) or Zach Thomas
([e-mail]).
Thank you,
Brianna Young, MS (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
NC DEQ/ Division of Water Resources
[e-mail] (e-mail preferred during State of Emergency)
919-707-3619 (office)
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: Adam Jolicoeur <[e-mail]>
Sent: Tuesday, July 13, 2021 7:55 AM
To: Young, Brianna A <[e-mail]>
Cc: Bell, Wes <[e-mail]>
5

Subject: [External] FW: Draft NPDES Permit #NC0084573- Questions
Importance: High
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Brianna,
Good morning. Since we are approaching end of the 30 day comment period, I was following up to see if you
had received my email.
Regards,
Adam
From: Adam Jolicoeur <[e-mail]>
Sent: Tuesday, July 06, 2021 9:46 AM
To: [e-mail]
Subject: Draft NPDES Permit #NC0084573
Importance: High
Ms. Young,
Good morning.
I have been reviewing the draft permit, and have a few questions:
#7) Changes to the duration of discharge monitoring- just so I am clear what is this specificity referring to in
the footnotes? Maybe I overlooked it?
Whole Effluent Toxicity- this had been changed from us using Pimephales promelas to Ceriodaphnia. What is
the reason for the change? We have been doing well with Pimephales promelas, would it be possible continue
with their use? I did see where it was changed from 90 percent to 63 percent mortality.
See second attachment, on page 7 of 9, under Note, it indicates failure to achieve test conditions shall constitute
an invalid test and will require immediate follow-up testing. Since we are monitor and report only, could this be
removed?
If it would be easier to call me directly to discuss, my mobile number is 980-429-7213.
Regards,
Adam M. Jolicoeur
WTP Superintendent
Department of Public Works
Lincoln County Government
6

Young, Brianna A
From: Adam Jolicoeur <[e-mail]>
Sent: Tuesday, July 13, 2021 10:22 AM
To: Young, Brianna A
Cc: Bell, Wes; Moore, Cindy; Thomas, Zachary T; Donald V. Chamblee, Jr.
Subject: RE: [External] FW: Draft NPDES Permit #NC0084573- Questions
Importance: High
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Ms. Young,
We have a continuous discharge flow meter that is calibrated annually. We discharge intermittently throughout
a 24 hour period,(Avg. 170,000 per day) and timing each discharge would be difficult to say the least. I am
requesting that the duration of discharge monitoring be removed.
Regards,
Adam
From: Young, Brianna A <[e-mail]>
Sent: Tuesday, July 13, 2021 9:21 AM
To: Adam Jolicoeur <[e-mail]>
Cc: Bell, Wes <[e-mail]>
Subject: RE: [External] FW: Draft NPDES Permit #NC0084573- Questions
CAUTION: This Email is from an EXTERNAL source. Ensure you trust this sender before clicking on any links or
attachments.
Yes, the length of time each discharge occurs will need to be reported.
Brianna Young, MS (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
NC DEQ/ Division of Water Resources
[e-mail] (e-mail preferred during State of Emergency)
919-707-3619 (office)
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.
1

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: Adam Jolicoeur <[e-mail]>
Sent: Tuesday, July 13, 2021 9:16 AM
To: Young, Brianna A <[e-mail]>
Cc: Bell, Wes <[e-mail]>
Subject: RE: [External] FW: Draft NPDES Permit #NC0084573- Questions
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Ok, I will contact Cindy and Zachary. But I am still unsure what is being asked as for duration? Will the new
permit require a time of how long we discharge? Could you please clarify.
Thank you,
Adam
From: Young, Brianna A <[e-mail]>
Sent: Tuesday, July 13, 2021 8:42 AM
To: Adam Jolicoeur <[e-mail]>
Cc: Bell, Wes <[e-mail]>
Subject: RE: [External] FW: Draft NPDES Permit #NC0084573- Questions
CAUTION: This Email is from an EXTERNAL source. Ensure you trust this sender before clicking on any links or
attachments.
Good morning Adam,
Yes, I did receive your email. I apologize for not responding as it got lost in the shuffle. Please see below for responses to
your questions.
#7) Changes to the duration of discharge monitoring- just so I am clear what is this specificity referring
to in the footnotes? Maybe I overlooked it?
This is not referring to any items in the footnotes, it is referring to the effluent table itself in Section A. (1) of
the permit. In the second row of the effluent table, there is a line where monitoring for "Duration of Discharge"
is required.
Whole Effluent Toxicity- this had been changed from us using Pimephales promelas to Ceriodaphnia.
What is the reason for the change? We have been doing well with Pimephales promelas, would it be
possible continue with their use? I did see where it was changed from 90 percent to 63 percent mortality.
This update was made to follow current guidance from the Aquatic Toxicology Branch on proper WET testing.
If you have any questions on toxicity testing, please reach out to Cindy Moore ([e-mail]) or Zach
Thomas ([e-mail]).
2

See second attachment, on page 7 of 9, under Note, it indicates failure to achieve test conditions shall
constitute an invalid test and will require immediate follow-up testing. Since we are monitor and report
only, could this be removed?
This is standard language provided by the Aquatic Toxicology Branch, therefore it cannot be removed. If you have any
questions on toxicity testing, please reach out to Cindy Moore ([e-mail]) or Zach Thomas
([e-mail]).
Thank you,
Brianna Young, MS (she/her)
Environmental Specialist II
Compliance and Expedited Permitting Unit
NC DEQ/ Division of Water Resources
[e-mail] (e-mail preferred during State of Emergency)
919-707-3619 (office)
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: Adam Jolicoeur <[e-mail]>
Sent: Tuesday, July 13, 2021 7:55 AM
To: Young, Brianna A <[e-mail]>
Cc: Bell, Wes <[e-mail]>
Subject: [External] FW: Draft NPDES Permit #NC0084573- Questions
Importance: High
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Brianna,
Good morning. Since we are approaching end of the 30 day comment period, I was following up to see if you
had received my email.
Regards,
Adam
From: Adam Jolicoeur <[e-mail]>
Sent: Tuesday, July 06, 2021 9:46 AM
To: [e-mail]
3

Subject: Draft NPDES Permit #NC0084573
Importance: High
Ms. Young,
Good morning.
I have been reviewing the draft permit, and have a few questions:
#7) Changes to the duration of discharge monitoring- just so I am clear what is this specificity referring to in
the footnotes? Maybe I overlooked it?
Whole Effluent Toxicity- this had been changed from us using Pimephales promelas to Ceriodaphnia. What is
the reason for the change? We have been doing well with Pimephales promelas, would it be possible continue
with their use? I did see where it was changed from 90 percent to 63 percent mortality.
See second attachment, on page 7 of 9, under Note, it indicates failure to achieve test conditions shall constitute
an invalid test and will require immediate follow-up testing. Since we are monitor and report only, could this be
removed?
If it would be easier to call me directly to discuss, my mobile number is 980-429-7213.
Regards,
Adam M. Jolicoeur
WTP Superintendent
Department of Public Works
Lincoln County Government
DISCLAIMER: Pursuant to the Freedom of Information -Privacy Acts (FOIPA)
and North Carolina General Statutes Chapter 132, Public Records, this electronic
mail message and any attachments hereto, as well as any electronic mail message(s)
sent in response to it may be considered public record and as such subject to
request and review by anyone at any time.
4

Whole Effluent Toxicity Testing and Self Monitoring Summary
Lexington WTP #1 & #2 NC0028037 County: Davidson Region: WSRO
Ceri7dPF Begin: 10/1/2020 Chr Monit: 21% NonComp: 7Q10: 2.9
J F M A M J
2017 - Pass - Pass
2018 - Pass - - Pass
2019 - Pass - - Pass
2020 - Pass - - Pass
2021 - Fail - -
Lincoln County WTP NC0084573/001 County: Lincoln
Fthd24PF Begin: 4/1/2017 Acu Fthd 24PF Monit NonComp:
J F M
2017 Fail
2018 - - Pass
2019 - - Pass
2020 - - Pass
2021 - - Pass
A M
Region: MRO
7Q10:
J
Pass
Pass
Fail
Pass
J
J
Basin: YADO7 Feb May Aug Nov
PF: 0.467 IWC: 20 Freq: Q
A
Pass
Pass
Pass
Fail
S O
Pass
SOC_JOC:
N
Pass
Pass
Pass
Fail
Basin: CTB32 Mar Jun Sep Dec SOC JOC:
PF: IWC: Freq: Q
A S 0 N D
Pass - Pass
Pass - - Pass
Pass - - Pass
- Pass - - Pass
Lincoln Terminal Company (Colonial Pip NC0046531/001 County: Mecklenburg Region: MRO Basin: CTB34
Fthd24Ac Begin: 10/1/2015 24 hr LC50 ac monit NonComp: 7Q10: 0.0 PF: NA IWC: 100 Freq: A
J F M A M J J A 5
2017 >100 - - - -
2018 - >100 -
2019 - >100 -
2020 >100 - - - - - - -
2021 >100 - - - - - - -
Lincolnton WTP NC0085588/001 County: Lincoln Region: MRO
Ceri7dPF Begin: 8/1/2020 Chr Monit: 4.5% Ann NonComp: 7Q10: 13
J F M A M J
2017 Pass - Pass
2018 - Pass - Pass
2019 - Pass - Pass
2020 Pass - Pass
2021 - Pass
Lincolnton WWTP NC0025496/001 County: Lincoln Region: MRO
Ceri7dPF Begin: 11/1/2016 chr lim: 6% (3.5MGD) NonComp: Single 7Q10: 77.0
J F M A M J
2017 Pass Pass
2018 - Pass>12(P) - - Pass
2019 - - Pass - - Pass>12(P)
2020 Pass - - Pass
2021 Pass - -
J
J
0
SOC JOC:
N D
Basin: CTB35 Mar Jun Sep Dec
PF: IWC: 1.41 Freq: A
A
SOC JOC:
5 O N D
Pass - - Pass
Pass - - Pass
Pass - - Pass
Pass - - -
Basin: CTB35 Mar Jun Sep Dec
PF: 6.0
SOC_JOC:
IWC: 11.0 Freq: Q
A 5 0 N D
- Pass >100(P) - - Pass
- Pass Pass - - Pass
- Pass - - Pass
- Pass - - Pass >12 (P)
Legend: P= Fathead minnow (Pimohales nromelas). H=No Flow (facility is active). s = Split test between Certified Labs
Page 67 of 119

2018 NC Category 5 Assessments "303(d) List" Final
Catawba River Basin
Upper Catawba Subbasin
03050101
D¢�ilerfl u] Gxh.oen41 R�y�
11-33-(2)
Canoe Creek
From Burke County SR 1248 to Catawba River
Classification
WS-IV
Length or Area
6
Units
FW Miles
Previous AU Number
Assessment Criteria Status Reason for Rating
Parameter of Interest
Category
Exceeding Criteria
Fair
Benthos (Nar, AL, FW)
5
11-130a
Catawba Creek
From source toSR2446, Gaston
C
Classification
Length or Area
6
Units
�W Miles
Previous AU Number
Assessment Crit
Exceeding Criteria
(Fair
Benthos (Nar, AL, FW)
5
11-130b Catawba Creek
From SR2446, Gaston to SR2439, Gaston
Classification C
Length or Area
3 _...__ FW Miles
Previous AU Number
Assessment Criteria Status Reason for Rating
Parameter of Interest
('ntconry
Exceeding Criteria
Fair
Benthos (Nar, AL, FW)
5
11-130c
Catawba Creek
FromSR2439 to Lake Wylie
Classification I C
Length or Area
5
Units
FW Miles
Previous AU Number
Paramet- of Interest
Exceeding Criteria
Fair
Fish Community (Nar, AL, FW)
5
11-(75) CATAWBA RIVER (Lake Norman below elevation 760)
From Lyle Creek to Cowan's Ford Dam
Classification WS-IV,B;CA
Length or Area 31,332
Units
FW Acres Previous AU Number
Assessment Criteria Status Reason for Rating
Parameter of Interest
Category
Exceeding Criteria
Fish Consumption Advisory
PCB Fish Tissue Advisory (Advisory, FC, NC) 5
6/3/2019 2018 NC Category 5 Assessments "303(d) List" Approved by EPA May 22,2019
Page 38 of 262

MONITORING REPORT(MR) VIOLATIONS for:
Report Date: 05/27/21 Page 1 of 1
Permit: nc0084573 MRs Betweei 3 - 2016 and 5 - 2021 Region: % Violation Category:% Program Category: %
Facility Name: % Param Nam(% County: % Subbasin:% Violation Action: %
Major Minor:
PERMIT: NC0084573
FACILITY: Lincoln County - Lincoln County WTP
COUNTY: Lincoln REGION: Mooresville
Limit Violation
MONITORING UNIT OF
OUTFALL LOCATION PARAMETER VIOLATION FREQUENCY
REPORT DATE MEASURE
LIMIT
CALCULATED
VALUE Over
VIOLATION TYPE VIOLATION ACTION
06-2016 001 Effluent Chlorine, Total Residual 06/09/16 2 X month ug/I 28 30 7.1 Daily Maximum No Action, BPJ
Exceeded
08-2017 001 Effluent Chlorine, Total Residual 08/16/17 2 X month ug/I 28 29 3.6 Daily Maximum No Action, BPJ
Exceeded
09-2017 001 Effluent Chlorine, Total Residual 09/05/17 2 X month ug/I 28 71 153.6 Daily Maximum Proceed to NOV
Exceeded
Reporting Violation
MONITORING VIOLATION UNIT OF CALCULATED
REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION
04-2017 001
Effluent Phosphorus, Total (as P) - 04/30/17 Quarterly mg/I
Concentration
Parameter Missing
No Action, BIMS
Calculation Error

ROY COOPER
Governor
MICHAEL S. REGAN
Secretory
LINDA CULPEPPER
NORTH CAROLINA
Director Environmental Quality
January 16, 2020
Lincoln County
Attn: Donald V. Chamblee, Jr.
5291 Crouse Rd
Crouse, NC 28033
Subject: Permit Renewal
Application No. NC0084573
Lincoln County WTP
Lincoln County
Dear Applicant:
The Water Quality Permitting Section acknowledges the January 15, 2020 receipt of your permit renewal application and
supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW permitting
branch. Per G.S. 150E-3 your current permit does not expire until permit decision on the application is made.
Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit. The
permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a
timely manner to requests for additional information necessary to allow a complete review of the application and renewal
of the permit.
Information regarding the status of your renewal application can be found online using the Department of Environmental
Quality's Environmental Application Tracker at:
https://deq.nc.gov/permits-regulations/permit-guidance/environmental-application-tracker
If you have any additional questions about the permit, please contact the primary reviewer of the application using the
links available within the Application Tracker.
Sincerely,
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
cc: Central Files w/application
ec: WQPS Laserfiche File w/application
North Carol na Department of EnvIronment• Quesity I Divson of Water Resources
Mcoresv- ie Reg one 0ff.oe 1 610 East Center Avenue, Suite 301 I Mooresv' e, North Carovna 28115
704-663-1699

1
Wren Thedford
NC DENR/DWR/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
January 07, 2020
Re: NPDES Permit NC0084573 Renewal Request
Dear Wren Thedford,
LINCOLN COUNTY PUBLIC WORKS
CHRIS HENDERSON
SENIOR ENGINEERING ASSOCIATE
RECEIVED
JAN 15 2020
NCDEQIDWRINPDES
I am writing this letter to you to formally request the renewal of our WTP NPDES
Permit, NC0084573. You should find the permit application filled out completely with
all pertinent information and diagrams requested. Since our last NPDES permit
renewal, Lincoln County is in the process of expanding the current Water Treatment
Plant from 3.99 MGD to 8.0 MGD under Water System #NC0155035 ATC Serial #17-
01100 (dated January 31, 2018).
The Operator in Responsible Charge is Mr. Adam Jolicoeur and his contact information
is:
Adam Jolicoeur
7674 Tree Farm Road
Denver, NC 28037
(704) 483 — 7070 Office
(704) 483 — 7072 Fax
[e-mail]
If you have any further questions, please feel free to contact me at your convenience.
Sincerely,
Chris Henderson
Senior Engineering Associate
O o.704-736-8495
f. 704-736-8499
dhendersangincolncounty.org
0
115 WEST MAIN STREET LINCOLNTON NC 28092
1

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Mail the complete application to:
NCDEQ / DWR / NPDES
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number
NC0084573
If you are completing this form in computer use the TAB key or the up - down arrows to move from one
field to the next. To check the boxes, click your mouse on top of the box. Otherwise, please print or type.
1. Contact Information:
Owner Name
Facility Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
e-mail Address
Lincoln County
Lincoln County WTP
115 West Main Street
Lincolnton
RECEIVED
NC 28092
JAN 15 2020
[phone]
[phone]
NCDEQIDWR/NPDES
[e-mail]
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road 7674 Tree Farm Lane
City
State / Zip Code
County
Denver
NC 28037
Lincoln
3. Operator Information:
Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the
Operator in Responsible Charge or ORC)
Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
Lincoln County
115 West Main Street
Lincolnton
NC 28092
[phone]
[phone]
4. Ownership Status:
Federal❑ State ❑ Private ❑ Public X❑
Page 1 of 3 Version 6/2017

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
5. Type of treatment plant:
X❑ Conventional (Includes coagulation, flocculation, and sedimentation, usually followed by
filtration and disinfection)
❑ Ion Exchange (Sodium Cycle Cationic ion exchange)
❑ Green Sand Filter (No sodium recharge)
❑ Membrane Technology (RO, nanofiltration)
Check here if the treatment process also uses a water softener
6. Description of source water(s) (i.e. groundwater, surface water)
Surface Water
7. Describe the treatment process(es) for the raw water:
Conventional Treatment. The Raw Water is taken from Lake Norman and injected with alum and
sodium hypochlorite (Miox). It then passes through the flocculators, across sedimentation
basins. Then it's filtered through multi -media filters. Prior to the filters, sodium hypochlorite
(Miox) is injected. The Finished Water is injected with sodium hypochlorite (Miox), sodium
hydroxide, fluoride, and orthophosphate.
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
The Backwash Water and Sludge from the sedimentation basins are sent to the thickeners. The
solids are settled out; the supernate is discharged to the lake. From the thickners, the sludge is
mixed with polymer, and then it's processed through the Huber Screw Press. The dried cake is
transferred by conveyor to a dumpster; once full it is sent to the County Landfill for use as fill
dirt.
9. Number of separate discharge points: 1 Outfall Identification number(s) 1
10. Frequency of discharge:
Continuous El Intermittent X❑
If intermittent:
Days per week discharge occurs: Daily
11. Plant design potable flowrate 8.0 MGD
Backwash or reject flow .09 MGD
Duration: 2 hours
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Little Creek Cove -Lake Norman/Catawba River Basin
13. Please list all water treatment additives, including cleaning chemicals or disinfection
treatments, that have the potential to be discharged.
Alum / aluminum sulfate
Yes X No
Page 2 of 3 Version 6/2017

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Iron sulfate / ferrous sulfate Yes No X
Fluoride Yes X No
Ammonia nitrogen / Chloramines Yes No X
Zinc -orthophosphate or sweetwater CP1236 Yes No X
List any other additives below:
Orthophosphate, Sodium Hypochlorite, Sodium Hydroxide, Sodium Thiosulphate
14. Is this facility located on Indian country? (check one)
Yes ❑ No X❑
15. Additional Information:
• Provide a schematic of flow through the facility, include 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 an outfall [including stormwater].
• Solids Handling Plan
16. NEW Applicants
Information needed in addition to items 1-15:
• New applicants are strongly recommended to contact a permit coordinator with the
NCDENR Customer Service Center.
Was the Customer Service Center contacted? ❑ Yes ❑ No
• Analyses of source water collected
• Engineering Alternative Analysis
• Discharges from Ion Exchange and Reverse Osmosis plants shall be evaluated using a
water quality model.
17. Applicant Certification
I certify that I am familiar with the information contained in the application and that to the
best of my knowledge and belief such information is true, complete, and accurate.
Donald V. Chamblee, Jr.
Printed name of Person Signing
Signature of Applicant
Director of Public Works
Title
Date
1/.1/2. z.z7.
North Carolina General Statute 143-215.6 (b)(2) provides that: Any person who knowingly makes any false statement representation, or certification in any application,
record, report, plan, or other document files or required to be maintained under Article 21 or regulations of the Environmental Management Commission implementing that
Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21
or regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $25,000, or by
imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5
years, or both, for a similar offense.)
Page 3 of 3 Version 6/2017

Latitude: 35-31-45
Longitude: 80-59-33
Quad # E15SW
Receiving Stream: Lake Norman
Stream Class: WS-IV & B CA
Subbasin: 30832
NC0084573
Lincoln County WTP
SCALE 1:24,000
APIraPirt;
oltioalltiblim
Alb" 11010
411101
FACILITY
LOCATION

LINCOLN COUNTY WATER TREATMENT PLANT
Pre -Disinfection
ALUM
PRE -CAUSTIC
PRE -FILTER Disinfection
ORTHOPHOSPHATE
FLOURIDE
CAUSTIC
POST Disinfection
PROCESS FLOW SCHEMATIC DIAGRAM NPDES Permit No. NC0084573
LAKE NORMAN
WATER INTAKE &
PUMP STATION
8.0 MGD
RAPID MIX
FLOCCULATION
SEDIMENTATION BASINS
1,000,000 gallons
FILTRATION
8 Filters
Clearwells
HIGH SERVICE PUMPS
(3) H.S. Pump 5 mgd
TO LINCOLN COUNTY
WATER DISTRIBUTON SYSTEM
WASTE (Alum Sludge)
SOLIDS
FILTER
BACKWASH
THICKENERS
Sodium Thiosulphate
SOLIDS DEWATERING
HUBER SCREW PRESS
LANDFILL OR LAND APPLICATION
DISPOSAL
DISCHARGE TO LAKE
(Average flow 77,000 GPD)
Department of Public Works
Water Treatment

LINCOLN COUNTY
WATER TREATMENT PLANT
RESIDUALS MANAGEMENT PLAN
June 2012
Prepared by
GOODWYN, MILLS AND CAWOOD, INC.
2660 EastCliase Lane, Suite 200
Montgomery, Alabama 36117
�•.. G O Cl ) IV Y N 61 I L L S C A W i) C) f1
r41FG•+:'FN I,g5: S(11011E1'15

a
TREATMENT MODIFICATIONS
The intent of the design of the proposed improvements is to comply with all requirements of DENR • Public Water
Supply Section 15A; 18C.0300- 18C.0700, The improvements do not modify the direct flow of the water through the
process, and will continue to follow the conventional surface water filtration process. The notable improvements to the
sludge handling facility are modifications to the gravity thickeners, new polymer feed system, installation of progressive
cavity pumps with smart stator technology followed by an energy -efficient screw press, and conveyors to transfer
dewatered solids to a durnpster or open Lecl truck. AM filtrate and process wastewater is returned to the existing yard
drain pump station to be treated through the solids handling process. All decant from the gravity thickeners exits
through the floating decant arms and flow is hydraulically controlled by electrically actuated valves. Prior to final
discharge, all decant is decklorinated with a dechlorinating agent to comply with current chlorine residual concentrations
per the existing NDPES permit,
Gravity Thickeners
The existing gravity thickeners are being retrofitted with a center column cage with two steel rake arms driven by a
continuous torque standard shaft 1 HP drive. The rake arms will have adjustable 304 stainless steel squeegees to
scrape the bottom of the tank. The existing tanks will be grouted to submerge the 8" withdrawal line and provide a
sump for sludge removal. The gravity thickeners will also receive floating decanters which consist of an 8" diameter
schedule 40, 304 stainless steel pipe with twenty (20) 2" diameter orifices with foam core floats attached to the
decant pipe. The decant pipe will float with the water level and primarily controlled by the electrically actuated valve.
The low water and high water level in the gravity thickener shall be 799.22' and 812.60', respectively, providing l' of
free board in each thickener.
Progressive Cavity Pumps
A sludge handling building will be constructed to house the dewatering feed pumps, dewatering mechanism and
conveyance system. As sludge exits the gravity thickeners, sludge can either enter the existing dewatering system
for redundancy or enter the new dewatering system by simply operating two manual valves outside the existing
sludge dewatering building. Sludge will enter the new sludge handling building into a header reducing down to 3"
prior to entering the feed pumps. The design will utilize progressive cavity pumps to pump the settled sludge from
the thickeners to a screw press. The progressive cavity pumps are designed to pump 6 to 20 GPM at a solids
content of 0.8 to 1.2% with a 3 HP motor.
Screw Press and Conveyance System
The screw press was piloted and studied extensively on -site at the Lincoln County Water Treatment Plant using
alum sludge from the current process in place for treated potable water. During the pilot, the feed solid
concentration to the screw press ranged from 0.8 to 1.2%. It was determined that at a flow rate of 4 GPM, the
screw handled 20 pounds per hour of dry solids. The calve produced was 24.6% dry solids. The maximum
throughput of the screw press is 45 pounds per dry solids at 8 GPM; however, the cake produced was only 20% dry

solids. The screw press will be rated to handling 40 to 90 pounds per hour of dry solids at 8 to 16 GPM producing
20 to 25% dry solids. After the dewatering process, cake solids will be conveyed through a series of four (4) shafted
screw conveyors to lift the solids to be discharged into a dumpster in a cover bay.
Chemical Feed System
Prior to sludge entering the screw press, polymer is introduced to assist with dewatering. Neat polymer will be
dosed into an aging tank with a peristaltic pump. A 500•gallon aging tank will be utilized to create batches of dilute
polymer. The chemical feed system is outfitted with a mixer to provide a complete mix system as well as a site glass
to monitor consistency of dilute polymer make up. Dilute polymer will then be fed to the screw press with a
duty/standy-by progressive cavity pump solely used for dilute polymer. The polymer will be injected downstream of
the sludge Feed polymer pumps and prior to a 2" check valve designed specifically for mixing. A detention time of
45 seconds has been provided between the point of polymer injection and the screw press inlet so that the polymer
can activate and optimally assist in dewatering.
CONCLUSION
All aforementioned equipment was installed to improve the current process of dewatering solids, The existing gravity
thickeners did not have a mechanical thickening mechanism; therefore, with this addition, it can be assumed that the feed
solids from the thickeners will be greater than the range observed in the pilot. Furthermore, the decanting arm will assist
in assuring that a quality clarified supernate in the thickener is decanted. Previously, the peripheral decant lines were
fixed withdrawing at a Fixed elevation with no indication to the location of the sludge blanket. The progressive cavity and
screw press tandem was selected due to the performance displayed in the pilot, efficiency and reliable operation as well
as ease of operation and maintenance. A shafted conveyor was selected to lift solids because of the simplicity of the
conveyors. The designed system provides redundancy as well as flexibility. All unit operations have a minimum of two
installations or the ability to be expanded to two installations. The sludge handling facility will be expandable and can
receive two additional progressive cavity pumps and screw presses as the need for solids handling increases, For the
interim, the existing sludge handling system will be left in full working order if back up is needed.
The proposed system was designed to meet the clients need with regard to redundancy, capacity, efficiency and
reliability for current and future demands. With this proposed system, the Lincoln County Public Works Lincoln
County Water Treatment Plant will be able to produce the desired 3.999 MGD with a method for sludge dewatering
to handle the volume of sludge being produced by the sedimentation and filtration processes.
Also, the existing vacuum drying bed will remain intact for redundancy of sludge removal. The existing quick disconnect
from the sludge thickeners will also remain in place. Thus, the operator tan utilize the drying bed as necessary or may
haul wet sludge. The design will allow for a system where the operator has three (3) options of processing sludge.

S
Sludge Handling System
Lincoln County Water Treatment Plant Recommended Operations Protocol
1.0 OBJECTIVE
The intent of the sludge handling operations at the Lincoln County Water Treatment Plant is to
provide solids handling of alum sludge in an efficient manner. In addition, the sludge handling
system protocol shall provide the operations staff methods and recommended procedures to
properly and efficiently operate the system described herein.
2.0 SCOPE
The sludge handling system provided is a combination of unit operations including two solids
thickeners, one positive displacement feed pump, a polymer system, and one dewatering press,.
The previous method of dewatering was a vacuum drying bed; however the County determined
that it was critical that the process no longer be weather dependent. The new sludge handling
system provides a process that requires minimal power and delivers processed solids at a percent
solids concentration acceptable for delivery to the local landfill. The sludge must meet the
requirements of the landfill and pass the paint filter liquids test. Additional optimization of the
solids handling system shall be as determined to be sensible by the operator.
3.0 SYSTEM DESCRIPTION
The equipment basis of design for the sludge handling system consists of the following unit
operations:
1. Thickeners (Westech)
a. The thickeners allow the operator to improve the consistency and solids content of
the sludge prior to conveyance to the dewatering process
2. Progressive Cavity Pump (Seepex)
a. The progressive cavity pump provides the required positive displacement,
metered flow pattern required for sludge processing
3. Polymer Feed System (Acrison)
a. The polymer system is a batch makeup system that is controlled locally by level
b. The Huber programmable logic control (PLC) provides a signal for startup and for
the feed pumps to deliver the necessary polymer dose to the sludge
4. Screw Press (Huber)
a. The screw press dewaters the sludge to a cake product
5. Conveyance (Custom Conveyors)
a. The conveyors transport dewatered cake to an owner selected dewatering bin
The Westech thickeners, Seepex feed pump, Acrison polymer system, Huber screw press, and
Huber conveyors work together to provide a complete process.
4.0 OPERATION
2

6
Sludge Handling System
Lincoln County Water Treatment Plant Recommended Operations Protocol
4.1 Thickeners
The sludge thickener mechanisms and their operation are critical in the success of the solids
dewatering process. The thickeners are fit with mechanical thickening devices at the bottom of
the conical tanks. The bottom of the conical tanks, where the 8 inch diameter effluent sludge
pipe is located, is at approximate elevation of 780 feet. The grade elevation at the tanks is
approximately 798 feet, thus the depth at which sludge can accumulate is upward of 18 vertical
feet. In addition, the decant mechanism for the water allows for the decanting of the tank to a
low water level (LWL) of near elevation 799. The top of wall of the sludge thickeners is near
814.8 allowing for over 13 feet of wastewater from the water treatment plant to accumulate from
the backwashing of filters and the removal of solids in the sedimentation process.
The operation of the sludge thickeners is critical to the dewatering process. The operator
controls the thickness of the solids with the rotating thickener and the available pressure (head)
in the tanks. The water level in the tank feeding the sludge dewatering process provides
backpressure on the sludge feed pumps. The 8 inch diameter sludge feed line operated at flow
rates between 8 and 20 gallons per minute provides little frictional headless in the pipe due to
velocity. The velocity of the sludge in the 8 inch pipe at 20 gallons per minute is near 0.13 feet
per second. However, the thixotropic properties of the sludge may create difficulties when
starting the dewatering process, specifically when it has not been operational for periods greater
than 12 hours.
4.2 Progressive Cavity Pump and Polymer System
The sludge feed pump suction is located at approximate elevation of 801.5 feet. Thus, the
operator shall, at a minimum, allow for the pumps to have a flooded suction. For operation of
the dewatering system, the tank from which the operator elects to process solids should have a
water level sufficient to overcome the head loss, which is minimal due to the low velocity in the
8 inch pipe, and the viscous/thixotropic properties of the sludge._ The pressure of the tanks
should read on the pressure gauge on the suction side of the pump to indicate to the operator that
sufficient head is present for beginning the dewatering process. It is recommended that the tank
water level be at a minimum elevation of 805 feet for the startup of the dewatering system.
Continuous use by the operator and logging of startup data should allow the operator to increase
or decrease this water level for startup dependent upon the comfort level with the sludge
consistency and backpressure on the pump.
Upon process initiation, the sludge (plug) valve from the thickener which is to be utilized for
sludge dewatering shall be opened. The operator shall fluidize the influent sludge line by turning
on the water connection at the suction of the pump. The water will provide lubrication of the pipe
for improved sludge conveyance.
3

Sludge Handling System
Lincoln County Water Treatment Plant Recommended Operations Protocol
The pressure gauge on the suction side of the pump shall be utilized to determine when sufficient
head pressure has built up behind the pump for startup. The operator may replace the existing
pressure gauge with a combination vacuum gauge to insure that a vacuum has not been created,
thereby protecting the progressive cavity pumps from running dry. The operator may elect to
wait until adequate sludge consistency is being conveyed to the screw press before initiating
polymer system injection.
Reducing the polymer injection prior to the sludge becoming consistency may waste costly
polymer. Once the sludge is actively being conveyed in the piping system, the polymer injection
can be initiated. All water and inconsistent sludge content prior to polymer injection and the
dewatering of the sludge shall flow as designed to the yard drain pump station that recycles the
contents to the thickener.
Additional flushing quick connections near the thickener on the conveyance piping are
recommended should plugging of the line become frequent during shut down periods. Existing
connections to the 8 inch pipe make this connection easily constructed and the conveyance line
cleared with the water pressure of the line. The thickener level must be elevated to force the
water pressure to move and lubricated around the sludge travelling toward the pump, in lieu of
simply filling the tank where the pressure may be lower.
4.3 Screw Press and Conveyance
After initiation of the process and confirmation of active sludge movement with consistency, the
process may then be operated and controlled by the Huber controller. The controller is designed
to operate the polymer system, dewatering system and dried solids conveyance system.
5.0 SYSTEM TERMINATION
Process termination is another critical component of the operations. Due to the known properties
of water treatment sludge, issues may develop in the feed piping that cause difficulties during the
subsequent startup. Operators shall fluidize the sludge feed line, and process sludge to the drain
through the screw press._ The wasted water and sludge will then be recycled back to the
thickener through the yard drain pump station. The feed line pressure gauge shall be monitored
and the pressure supplied by the water should increase the pressure in the line to indicate good
fluidization.
6.0 TESTING AND REPORTING
It is recommended that multiple data entries be logged with each startup. These factors will aid
in the optimization of the process not only by present operators but by future operations staff.
The entries should include, but not be limited to:
1. Thickener utilized for dewatering process (1 or 2);
4

it
Sludge Handling System
Lincoln County Water Treatment Plant Recommended Operations Protocol
2. Water elevation in thickener at startup;
3. Time between shutdown and startup;
4. Percent solids influent;
5. Polymer usage;
6. Average sludge flow rate;
7. Percent solids processed;
8. Process run time;
9. Faults encountered during processing;
10. Total sludge volume processed;
11. Thickener run times; and
12. Sludge line pressure.
Data logging, whether in the PLC or in tabular form, allows operators to constructively
troubleshoot. Process optimization is made more efficient, and quality information becomes
readily accessible to management purposes.- Many other data points should also be evaluated
and the operator should use good judgment in determining the necessary additional points to
monitor.
The operator shall utilize the data log to make decisions on the run times for the thickener
mechanisms._ It is likely that the thickener should not be run at all times, as the thickening of the
alum sludge when not processing solids may create a consistency that is difficult to convey and
process. _In addition, the solids may be forced into the lower elevations of the pipe between the
thickener and the feed pump and become consolidated creating problems for the subsequent
startup. Other actions that aids in the clearing of this sludge line are the flushing of the line prior
to process termination and utilizing the available head pressure in the tanks to feed the pumps.
Modifications to the sludge handling process operations protocol shall be made as data becomes
available for analysis. Improved comprehension of the specific installation through the data
collected shall provide improved operations.
7.0 SUMMARY
The sludge handling system shall be operated to meet the requirement for delivery of the
dewatered product to the local landfill. The operations staff must be cognizant of the
aforementioned items to provide a system that functions properly and efficiently as designed.
Data shall be recorded and tracked so that changes can be made to the sludge handling system. It
is recommended that process changes be made immediately when the sludge handling system is
not operating as intended. These changes shall be at the discretion of the operator responsible
for the system at that time. Efficient sludge handling operations at the Lincoln County Water
Treatment Plant is an integral process to the overall treatment process and shall be operated with
the recommendations provided, data collected and experience gained while the sludge handling
system is in operation.

LINCOLN COUNTY WATER TREATMENT PLANT
SLUDGE HANDLING SYSTEM
RECOMMENDED OPERATIONS PROTOCOL
Date: 5/15/14

Sludge Handling System
Lincoln County Water Treatment Plant Recommended Operations Protocol
1.0 OBJECTIVE
The intent of the sludge handling operations at the Lincoln County Water Treatment Plant is to
provide solids handling of alum sludge in an efficient manner. In addition, the sludge handling
system protocol shall provide the operations staff methods and recommended procedures to
properly and efficiently operate the system described herein.
2.0 SCOPE
The sludge handling system provided is a combination of unit operations including two solids
thickeners, one positive displacement feed pump, a polymer system, and one dewatering press,.
The previous method of dewatering was a vacuum drying bed; however the County determined
that it was critical that the process no longer be weather dependent. The new sludge handling
system provides a process that requires minimal power and delivers processed solids at a percent
solids concentration acceptable for delivery to the local landfill. The sludge must meet the
requirements of the landfill and pass the paint filter liquids test. Additional optimization of the
solids handling system shall be as determined to be sensible by the operator.
3.0 SYSTEM DESCRIPTION
The equipment basis of design for the sludge handling system consists of the following unit
operations:
1. Thickeners (Westech)
a. The thickeners allow the operator to improve the consistency and solids content of
the sludge prior to conveyance to the dewatering process
2. Progressive Cavity Pump (Seepex)
a. The progressive cavity pump provides the required positive displacement,
metered flow pattern required for sludge processing
3. Polymer Feed System (Acrison)
a. The polymer system is a batch makeup system that is controlled locally by level
b. The Huber programmable logic control (PLC) provides a signal for startup and for
the feed pumps to deliver the necessary polymer dose to the sludge
4. Screw Press (Huber)
a. The screw press dewaters the sludge to a cake product
5. Conveyance (Custom Conveyors)
a. The conveyors transport dewatered cake to an owner selected dewatering bin
The Westech thickeners, Seepex feed pump, Acrison polymer system, Huber screw press, and
Huber conveyors work together to provide a complete process.
4.0 OPERATION
2

Sludge Handling System
Lincoln County Water Treatment Plant Recommended Operations Protocol
4.1 Thickeners
The sludge thickener mechanisms and their operation are critical in the success of the solids
dewatering process. The thickeners are fit with mechanical thickening devices at the bottom of
the conical tanks. The bottom of the conical tanks, where the 8 inch diameter effluent sludge
pipe is located, is at approximate elevation of 780 feet. The grade elevation at the tanks is
approximately 798 feet, thus the depth at which sludge can accumulate is upward of 18 vertical
feet. In addition, the decant mechanism for the water allows for the decanting of the tank to a
low water level (LWL) of near elevation 799. The top of wall of the sludge thickeners is near
814.8 allowing for over 13 feet of wastewater from the water treatment plant to accumulate from
the backwashing of filters and the removal of solids in the sedimentation process.
The operation of the sludge thickeners is critical to the dewatering process. The operator
controls the thickness of the solids with the rotating thickener and the available pressure (head)
in the tanks. The water level in the tank feeding the sludge dewatering process provides
backpressure on the sludge feed pumps. The 8 inch diameter sludge feed line operated at flow
rates between 8 and 20 gallons per minute provides little frictional headless in the pipe due to
velocity. The velocity of the sludge in the 8 inch pipe at 20 gallons per minute is near 0.13 feet
per second. However, the thixotropic properties of the sludge may create difficulties when
starting the dewatering process, specifically when it has not been operational for periods greater
than 12 hours.
4.2 Progressive Cavity Pump and Polymer System
The sludge feed pump suction is located at approximate elevation of 801.5 feet. Thus, the
operator shall, at a minimum, allow for the pumps to have a flooded suction. For operation of
the dewatering system, the tank from which the operator elects to process solids should have a
water level sufficient to overcome the head loss, which is minimal due to the low velocity in the
8 inch pipe, and the viscous/thixotropic properties of the sludge._ The pressure of the tanks
should read on the pressure gauge on the suction side of the pump to indicate to the operator that
sufficient head is present for beginning the dewatering process. It is recommended that the tank
water level be at a minimum elevation of 805 feet for the startup of the dewatering system.
Continuous use by the operator and logging of startup data should allow the operator to increase
or decrease this water level for startup dependent upon the comfort level with the sludge
consistency and backpressure on the pump.
Upon process initiation, the sludge (plug) valve from the thickener which is to be utilized for
sludge dewatering shall be opened. The operator shall fluidize the influent sludge line by turning
on the water connection at the suction of the pump. The water will provide lubrication of the pipe
for improved sludge conveyance.
3

Sludge Handling System
Lincoln County Water Treatment Plant Recommended Operations Protocol
The pressure gauge on the suction side of the pump shall be utilized to determine when sufficient
head pressure has built up behind the pump for startup. The operator may replace the existing
pressure gauge with a combination vacuum gauge to insure that a vacuum has not been created,
thereby protecting the progressive cavity pumps from running dry. The operator may elect to
wait until adequate sludge consistency is being conveyed to the screw press before initiating
polymer system injection.
Reducing the polymer injection prior to the sludge becoming consistency may waste costly
polymer. Once the sludge is actively being conveyed in the piping system, the polymer injection
can be initiated. All water and inconsistent sludge content prior to polymer injection and the
dewatering of the sludge shall flow as designed to the yard drain pump station that recycles the
contents to the thickener.
Additional flushing quick connections near the thickener on the conveyance piping are
recommended should plugging of the line become frequent during shut down periods. Existing
connections to the 8 inch pipe make this connection easily constructed and the conveyance line
cleared with the water pressure of the line. The thickener level must be elevated to force the
water pressure to move and lubricated around the sludge travelling toward the pump, in lieu of
simply filling the tank where the pressure may be lower.
4.3 Screw Press and Conveyance
After initiation of the process and confirmation of active sludge movement with consistency, the
process may then be operated and controlled by the Huber controller. The controller is designed
to operate the polymer system, dewatering system and dried solids conveyance system.
5.0 SYSTEM TERMINATION
Process termination is another critical component of the operations. Due to the known properties
of water treatment sludge, issues may develop in the feed piping that cause difficulties during the
subsequent startup. Operators shall fluidize the sludge feed line, and process sludge to the drain
through the screw press._ The wasted water and sludge will then be recycled back to the
thickener through the yard drain pump station. The feed line pressure gauge shall be monitored
and the pressure supplied by the water should increase the pressure in the line to indicate good
fluidization.
6.0 TESTING AND REPORTING
It is recommended that multiple data entries be logged with each startup. These factors will aid
in the optimization of the process not only by present operators but by future operations staff.
The entries should include, but not be limited to:
1. Thickener utilized for dewatering process (1 or 2);
4

Sludge Handling System
Lincoln County Water Treatment Plant Recommended Operations Protocol
2. Water elevation in thickener at startup;
3. Time between shutdown and startup;
4. Percent solids influent;
5. Polymer usage;
6. Average sludge flow rate;
7. Percent solids processed;
8. Process run time;
9. Faults encountered during processing;
10. Total sludge volume processed;
11. Thickener run times; and
12. Sludge line pressure.
Data logging, whether in the PLC or in tabular form, allows operators to constructively
troubleshoot. Process optimization is made more efficient, and quality information becomes
readily accessible to management purposes.- Many other data points should also be evaluated
and the operator should use good judgment in determining the necessary additional points to
monitor.
The operator shall utilize the data log to make decisions on the run times for the thickener
mechanisms._ It is likely that the thickener should not be run at all times, as the thickening of the
alum sludge when not processing solids may create a consistency that is difficult to convey and
process. _In addition, the solids may be forced into the lower elevations of the pipe between the
thickener and the feed pump and become consolidated creating problems for the subsequent
startup. Other actions that aids in the clearing of this sludge line are the flushing of the line prior
to process termination and utilizing the available head pressure in the tanks to feed the pumps.
Modifications to the sludge handling process operations protocol shall be made as data becomes
available for analysis. Improved comprehension of the specific installation through the data
collected shall provide improved operations.
7.0 SUMMARY
The sludge handling system shall be operated to meet the requirement for delivery of the
dewatered product to the local landfill. The operations staff must be cognizant of the
aforementioned items to provide a system that functions properly and efficiently as designed.
Data shall be recorded and tracked so that changes can be made to the sludge handling system. It
is recommended that process changes be made immediately when the sludge handling system is
not operating as intended. These changes shall be at the discretion of the operator responsible
for the system at that time. Efficient sludge handling operations at the Lincoln County Water
Treatment Plant is an integral process to the overall treatment process and shall be operated with
the recommendations provided, data collected and experience gained while the sludge handling
system is in operation.
5