NCG590033_Fact Sheet_20200506

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 Expedited Permit Renewals
Permit Writer / Date
Brianna Young 5/6/2020
Permit Number
NCO085588
Facility Name / Facility Class
Lincolnton WTP / PC-1
Basin Name / Sub -basin number
Catawba / 03-08-35
Receiving Stream / HUC
South Fork Catawba River / 030501020403
Stream Classification / Stream Segment
WS-IV / 11-129- 3.7
Does permit need Daily Maximum NH3
limits?
N/A
Does permit need TRC limits/language?
Alread resent
Does permit have toxicity testing? IWC (%) if
so
Yes; IWC = 4.5%
Does permit have Special Conditions?
None
Does permit have instream monitoring?
Yes — upstream hardness
Is the stream impaired on 303 d list)?
No
Any obvious compliance concerns?
None
Any permit mods since lastpermit?
No
New expiration date
7/31/2025
Comments on Draft Permit?
N/A
Section 1. Facility Overview:
The Lincolnton WTP operates a conventional and ion exchange WTP designed for a
potable flowrate of 12.0 MGD. The facility generates backflow with an intermittent
discharge (7 days a week for 9 hours per day). The maximum, monthly average discharge
between March 2017 and February 2020 was approximately 0.380 MGD.
Section 2. Compliance History (April 2015 — April 2020):
• No NOVs or enforcements in the previous 5 years
• Have passed all tox tests since March 2016
Section 3. RPA•
The maximum monthly average flow between March 2017 and February 2020 was
approximately 0.380 MGD.

• Copper — No RP, Predicted max > 50% of allowable Cw; Quarterly monitoring
maintained
• Fluoride — No RP, Predicted max < 50% of allowable Cw; Quarterly monitoring
will be maintained as facility indicated fluoride has the potential to be discharged
• Zinc — No RP, Predicted max < 50% of allowable Cw; Quarterly monitoring will
be maintained as facility indicated zinc has the potential to be discharged
Section 4. NCG59 General Permit Eligibility:
• They have passed last 12 tox tests, therefore they are eligible by tox standards
• They do not have limits for any parameters, therefore they are eligible
• They use conventional treatment technology, therefore they are eligible
• Conclusion: They are 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
• Updated language on the Supplement to Permit Cover Sheet
• Updated stream segment and HUC on the Supplement to Permit Cover Sheet
• Added components list on the Supplement to Permit Cover Sheet
• Added facility grade in A(1)
• Added units of measure in A(1)
• Duration of discharge reporting moved from footnotes to effluent table in A(l)
• Added effluent turbidity monitoring and removed instream turbidity monitoring in
A(1) per 2009 WTP strategy
• Added monitoring for TN and TP in A(l) per 2009 WTP strategy
• Added hardness footnotes in A(l)
• Removed former footnote #4 stating "Parameter should be sampled in conjunction
with Quarterly Toxicity Testing" as this is no longer required per 2012 WTP
guidance
• Updated tox language in A(2)
Section 6. Transfer to NCG590000:
• On 4/24/2020, permittee was informed (via email) that they qualified for the
NCG590000, and to request in writing if they would like to transfer to the general
permit
• On 5/5/2020, the permittee requested (via email) to be transferred to the
NCG590000

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/l
(Dissolved)
Chronic FW,
µg/1
(Dissolved)
Acute SW, µg/1
(Dissolved)
Chronic SW,
µg/1
(Dissolved)
Arsenic
340
150
69
36
Beryllium
65
6.5
---
---
Cadmium
Calculation
Calculation
40
8.8
Chromium III
Calculation
Calculation
---
---
Chromium VI
16
11
1100
50
Copper
Calculation
Calculation
4.8
3.1
Lead
Calculation
Calculation
210
8.1
Nickel
Calculation
Calculation
74
8.2
Silver
Calculation
0.06
1.9
0.1
Zinc
Calculation
Calculation
90
81
Table 1 Notes:
1. FW= Freshwater, SW= Saltwater
2. Calculation = Hardness dependent standard
3. Only the aquatic life standards listed above are expressed in dissolved form.
Aquatic life standards for Mercury and selenium are still expressed as Total
Recoverable Metals due to bioaccumulative concerns (as are all human health
standards for all metals). It is still necessary to evaluate total recoverable aquatic
life and human health standards listed in 15A NCAC 213.0200 (e.g., arsenic at 10
µg/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, /1
Cadmium, Acute
WER* 11. 136672-[ln hardness] (0.04183 8)1 e^{0.9151 [In hardness]-3.14851
Cadmium, Acute Trout waters
WER* {1. 136672-[ln hardness] (0.041838)} e^{0.9151[ln hardness]-3.6236}
Cadmium, Chronic
WER*{1.101672-[1n hardness] (0.041838)} e^{0.7998[ln hardness]-4.4451}
Chromium III, Acute
WER*0.316 e^{0.8190[ln hardness]+3.72561
Chromium III, Chronic
WER*0.860 e^{0.8190[ln hardness]+0.68481

Copper, Acute
WER*0.960 e^{0.9422[ln hardness]-1.7001
Copper, Chronic
WER*0.960 e^{0.8545[ln hardness]-1.7021
Lead, Acute
WER*{1.46203-[ln hardness](0.145712)} • e^{1.273[ln hardness]-1.4601
Lead, Chronic
WER*11.46203-[ln hardness](0.145712)} • ell {1.273[In hardness]-4.705}
Nickel, Acute
WER*0.998 e^{0.8460[ln hardness]+2.2551
Nickel, Chronic
WER*0.997 e^{0.8460[ln hardness]+0.05841
Silver, Acute
WER*0.85 • e^{1.72[ln hardness]-6.591
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:

• Critical low flow of the receiving stream, 7Q10 (the spreadsheet
automatically calculates the 1 Q 10 using the formula 1 Q 10 = 0.843
(s7Q I0, 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, m_/g_L)
(Permitted Flow, cfs + s7Q 10, cfs)
The Combined Hardness for acute is the same but the calculation uses the IQ 10
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.

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 = I
Ctotal I + { [Kpo] [SS(I+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) (Cwgs) — (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 s7Q 10 may be incorporated as applicable:
IQ 10 = used in the equation to protect aquatic life from acute toxicity

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
Monitoring data pulled from
(mg/L)
BIMS
Total as, CaCO3 or Ca+M
Average Upstream Hardness
Monitoring data pulled from
(mg/L)
BIMS
[Total as, CaCO3 or Ca+M ]
7Q10 summer cfs
13
BIMS
1 10 cfs
10.76
RPA
Permitted Flow (MGD)
0.380
Max monthly average over
revious 36 months per DMRs

Young, Brianna A
From: Steven Zickefoose <[e-mail]>
Sent: Tuesday, May 05, 2020 3:49 PM
To: Young, Brianna A
Cc: Robert W. Pearson; Basinger, Corey; Tuvia, Ori A; Richard Haynes
Subject: [External] RE: City of Lincolnton WTP (NC0085588)
Attachments: Discharge Permit Letter- City of Lincolnton.pdf
IEM=k—x-ternal email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
nc. ovA
Ms. Young,
Please find attached the City of Lincolnton's request that the Division proceed with issuing the General Permit
instead of renewing the existing Individual permit.
Thank you for providing this as an option.
Regards,
SrWW E, 6&646au
Lincolnton City Manager/Finance Director
114 W. Sycamore St.
Lincolnton, NC 28092
704-736-8980
Lincointon NC
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.
From: Young, Brianna A [mailto:[e-mail]]
Sent: Friday, April 24, 2020 8:40 AM
To: Steven Zickefoose <[e-mail]>
Cc: Robert W. Pearson <[e-mail]>; Basinger, Corey <[e-mail]>; Tuvia, Ori A
<[e-mail]>
Subject: City of Lincolnton WTP (NC0085588)
Good morning Mr. Zickefoose:

On August 1, 2019 the Division of Water Resources (DWR) issued General Permit NPDES NCG590000 for wastewaters
from Greensand and Conventional type water treatment plants. This permit was developed to expedite the issuance and
reissuance of these types of permits.
The City of Lincolnton's existing Individual NPDES permit for its Water Treatment Plant (WTP) is up for renewal and
qualifies for coverage under NCG590000. The annual permit fee for the general permit is $100 verses $860 for an
Individual permit and monitoring is less frequent than that listed in NC0085588.
Similar to Individual NPDES permits, General Permits expire every five years but can be renewed by completing a short
and simple general permit renewal form. The General Permit is reissued every five years and is sent to all the Permittees
covered under it, all at the same time.
To switch to the General permit, the City will need to make a written request to DWR. Please note, the issuance of the
General Permit would require the rescission of your individual permit. The Division suggests that you review the
attached file containing the General Permit and decide whether you would like the Division to renew the individual
permit or proceed with issuance of a Certificate of Coverage for the WTP. Note that the Lincolnton WTP operates a
conventional water treatment system that discharges to freshwater, so the facility would be subject to the limitations
listed on page 7 [B. (3) Conventional WTP Effluent Limitations and Monitoring Requirements — Discharges to
Freshwater] in the attached General permit.
To request that the Division proceed with issuing the General Permit instead of renewing the existing Individual permit,
the City should respond with the wording below, or equivalent text:
The City of Lincolnton has reviewed the Division of Water Resources General Permit NCG5900000 for
greensand and conventional type water treatment plants and requests that the discharge from the
Lincolnton WTP be covered under this new general permit. The City understands that the Division will
rescind the individual NPDES permit for the Lincolnton WTP — NCO085588 when the Certificate of
Coverage for the General Permit NCG590000 is issued to the City for the WTP.
The written request shall be signed by an authorized City of Lincolnton official in accordance with 15A NCAC 02H
.0106(e).
Please let me know how you would like us to proceed within the next two weeks, preferably by May 11, 2020. If we do
not get a response by that date, the Division will proceed with the renewal of NC0085588. If you have any questions
concerning this matter, please contact me by email at [e-mail].
Regards,
Brianna Young
Environmental Specialist II
Compliance and Expedited Permitting Branch
Division of Water Resources
Department of Environmental Quality
Office: 919-707-3619
Brian na.Young(@ncdenr.aov
Mailing address:
1617 Mail Service Center
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed
to third parties.

CITY COUNCIL
Ed L. Hatley, Mayor
Martin A. Eaddy, Mayor Pro-Tem
Mary Frances White
Roby D.Jetton
Jim Watson
May 5, 2020
LincoRnton NC
Brianna Young
Environmental Specialist II
Compliance and Expedited Permitting Branch
Division of Water Resources
Department of Environmental Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Ms. Young:
CITY MANAGER
Steve Zickefoose, MBA
szickefooseWincolntonnc. org
CITY CLERK
Daphne Ingram
dingramCalincolntonne.org
CITY ATTORNEY
Thomas J. Wilson, Jr.
The City of Lincolnton has reviewed the Division of Water Resources General Permit NCG5900000 for
greensand and conventional type water treatment plants and requests that the discharge from the
Lincolnton WTP be covered under this new general permit. The City understands that the Division will
rescind the individual NPDES permit for the Lincolnton WTP — NCO085588 when the Certificate of
Coverage for the General Permit NCG590000 is issued to the City for the WTP.
Sincerely,
Steven B. Zickefoose, MBA
City Manager/Finance Director
C: Robert Pearson
114 WEST SYCAMORE STREET- P.O. BOX 617 • LINCOLNTON, NORTH CAROLINA 28093-0617
PHONE [phone]

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
rREQUIRED DATA ENTRY
Table 1. Proiect Information
Facility Name
WWTP/WTP Class
NPDES Permit
Outfal I
Flow, Ow (MGD)
Receiving Stream
HUC Number
Stream Class
❑ CHECK IF HQW OR ORW WQS
Lincolnton WTP
PC-1
NCO085588
001
0.380
South Fork Catawba River
030501020403
WS-IV
El Apply WS Hardness WQC
7010s (cfs)
7010w (cfs)
30Q2 (cfs)
QA (cfs)
1010s (cfs)
13.00
10.76
Effluent Hardness
-----
Upstream Hardness
----------------------------
Combined Hardness Chronic
----------------------------
Combined Hardness Acute
16.18 mg/L (Avg)
---------------����
16.36 mg/L (Avg)
25 mg/L
25 mg/L
Data Source(s)
--------------------
❑ CHECK TO APPLY MODEL
Par01
Par02
Par03
Par04
Par05
Par06E
Par07
Par08
Par09
Par10
Par11
Par12
Par13
Par14
Par15
Par16
Par17
Par18
Par19
Par20
Par21
Par22
Par23
Par24
Table 2. Parameters of Concern
Name WQS Type Chronic Modifier Acute PQL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health Water Supply
C
10
HH/WS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic Life
NC
0.5899
FW
3.2396
ug/L
Chlorides
Aquatic Life
NC
230
FW
mg/L
Chlorinated Phenolic Compounds
water Supply
NC
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
NC
300
A
ug/L
Chromium III
Aquatic Life
NC
117.7325
FW
905.0818
ug/L
Chromium VI
Aquatic Life
NC
11
FW
16
Ng/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
Ng/L
Nickel
Water Supply
NC
25.0000
WS
N/A
Ng/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
NCO085588 RPA 2020, input
5/8/2020

H1
REASONABLE POTENTIAL ANALYSIS
H2
Use "PASTE SPECIAL
Effluent Hardness Values" then "COPY" Upstream Hardness
. Maximum data
points = 58
Date Data
BDL=1/2DL
Results
1 6/6/2017
20
20
Std Dev.
2 9/12/2017
20
20
Mean
3 12/5/2017
20
20
C.V.
4 3/6/2018
16
16
n
5 6/5/2018
16
16
10th Per value
6 9/11/2018
12
12
Average Value
7 12/4/2018
8
8
Max. Value
8 3/12/2019
12
12
9 6/4/2019
18
18
10 9/10/2019
20
20
11 12/3/2019
16
16
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use"PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
Date
Data
BDL=1/2DL
Results
4.0452
1
6/6/2017
20
20
Std Dev.
4.8841
16.1818
2
9/12/2017
20
20
Mean
16.3636
0.2500
3
12/5/2017
20
20
C.V.
0.2985
11
4
3/6/2018
20
20
n
11
12.00 mg/L
5
6/5/2018
8
8
10th Per value
8.00 mg/L
16.18 mg/L
6
9/11/2018
16
16
Average Value
16.36 mg/L
20.00 mg/L
7
12/4/2018
20
20
Max. Value
20.00 mg/L
8
3/12/2019
8
8
9
6/4/2019
16
16
10
9/10/2019
20
20
11
12/3/2019
12
12
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
NCO085588 RPA 2020, data
-2- 5/8/2020

REASONABLE POTENTIAL ANALYSIS
Pall
Copper
Date
Data
BDL=1/2DL
Results
1
6/9/2016
15
15
Std Dev.
2
6/21/2016
21
21
Mean
3
9/13/2016
13
13
C.V.
4
12/6/2016
2
2
n
5
3/7/2017
2
2
6
6/6/2017
13
13
Mult Factor =
7
9/12/2017
10
10
Max. Value
8
12/5/2017
< 2
1
Max. Fred Cw
9
3/6/2018
5
5
10
6/5/2018
51
51
11
9/11/2018
10
10
12
12/4/2018
8
8
13
3/12/2019
3
3
14
6/4/2019
20
20
15
9/10/2019
39
39
16
12/3/2019
6
6
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 Par13
Values" then "COPY"
. Maximum data
points = 58
Use"PASTE SPECIAL
Fluoride Values" then "COPY"
. Maximum data
points = 58
Date
Data
BDL=1/2DL
Results
13.8358
1
6/9/2016
<
100
50
Std Dev.
13.6875
2
6/21/2016
<
10
5
Mean
1.0108
3
9/13/2016
<
100
50
C.V.
16
4
12/6/2016
<
100
50
n
5
3/7/2017
<
100
50
1.79
6
6/6/2017
140
140
Mult Factor =
51.00 ug/L
7
9/12/2017
<
100
50
Max. Value
91.29 ug/L
8
12/5/2017
<
100
50
Max. Fred Cw
9
3/6/2018
<
100
50
10
6/5/2018
100
100
11
9/11/2018
729
729
12
12/4/2018
<
100
50
13
3/12/2019
<
100
50
14
6/4/2019
<
100
50
15
9/10/2019
<
100
50
16
12/3/2019
<
100
50
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
98.3750
1.7335
16
2.26
729.0 ug/L
1647.5 ug/L
NCO085588 RPA 2020, data
-3- 5/8/2020

REASONABLE POTENTIAL ANALYSIS
Par21
Date Data
1 6/9/2016 <
2 6/21 /2016 <
3 9/13/2016 <
4 12/6/2016 <
5 3/7/2017 <
6 6/6/2017 <
7 9/12/2017 <
8 12/5/2017
9 3/6/2018
10 6/5/2018 <
11 9/11/2018 <
12 12/4/2018 <
13 3/12/2019 <
14 6/4/2019 <
15 9/10/2019 <
16 12/3/2019 <
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
Zinc
BDL=1/2DL
10 5
10 5
10 5
10 5
10 5
10 5
10 5
42 42
20 20
10 5
10 5
10 5
10 5
10 5
10 5
10 5
Use"PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
Results
Std Dev.
9.7468
Mean
8.2500
C.V.
1.1814
n
16
Mult Factor = 1.91
Max. Value 42.0 ug/L
Max. Fred Cw 80.2 ug/L
-4-
NCO085588 RPA 2020, data
5/8/2020

Lincolnton WTP
NCO085588
Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Qw (MGD) =
0.3799
WWTP/WTP Class:
PC-1
1Q10S (cfs) =
10.76
IWC% @ 1Q10S =
5.188545001
7Q10S (cfs) =
13.00
1WC% @ 7Q10S =
4.333259259
7Q10W (cfs) =
NO 7Q10w DATA
IWC% @ 7Q10W =
N/A
30Q2 (cfs) =
NO 30Q2 DATA
1WC% @ 30Q2 =
N/A
Avg. Stream Flow, QA (cfs) =
NO QA DATA
IW%C @ QA =
N/A
Receiving Stream:
South Fork Catawba River HUC 030501020403 Stream Class:
WS-IV
Outfall 001
Qw = 0.37989655 MGD
COMBINED HARDNESS (me/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
16.18 mg/L (Avg)
PARAMETER
NC STANDARDS OR EPA CRITERIA
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
o_
Applied
Chronic Acute
n # Det. Max Pred Cw Allowable Cw
Standa
Acute: 201.83
Copper
NC
7.8806 FW(7Q10s) 10.4720
ug/L
16 15
91.29
_ _ _ _
_ _ _ _ _ _ _ _ _ _ _
_
Chronic: 181 86
_
No RP ,Predicted Max z 50% of Allowable Cw
No value > Allowable Cw
apply Quarterly Monitoring
Acute: NO WQS
Fluoride
NC
1800 FW(7Q10s)
ug/L
16 3
1,647.5
Chronic: 41,539.2
No RP, Predicted Max < 50% of Allowable Cw
No value > Allowable Cw
Acute: 2,422.7 No RP, Predicted Max < 50% of Allowable Cw
Zinc
NC
126.7335 FW(7Q10s) 125.7052
ug L 16 2
80.2
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Chronic: 2,924.7
No RP, Predicted Max < 50% of Allowable Cw
No value > Allowable Cw
NCO085588 RPA 2020, rpa
Page 5 of 50 5/8/2020

NH3/TRC WLA Calculations
Facility: Lincolnton WTP
PermitNo. NC0085588
Prepared By: Brianna Young
Enter Design Flow (MGD): 0.379897
Enter s7Q10 (cfs): 13
Enter w7Q10 cfs : 0
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/1)
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/1)
s7Q10 (CFS)
13
s7Q10 (CFS)
13
DESIGN FLOW (MGD)
0.379897
DESIGN FLOW (MGD)
0.3799
DESIGN FLOW (CFS)
0.58884
DESIGN FLOW (CFS)
0.58884
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
Upstream Bkgd (ug/1)
0
Upstream Bkgd (mg/1)
0.22
IWC (%)
4.33
IWC (%)
4.33
Allowable Conc. (ug/1)
392
Allowable Conc. (mg/1)
18.2
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Fecal Coliform
w7Q10 (CFS)
0
Monthly Average Limit:
200/100ml DESIGN FLOW (MGD)
0.3799
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.58884
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF)
23.08 Upstream Bkgd (mg/1)
0.22
IWC (%)
100.00
Allowable Conc. (mg/1)
1.8
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
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)

Whole Effluent Toxicity Testing and Self Monitoring Summary
Lincolnton WTP
NCO085588/001
County: Lincoln
Region: MRO
Basin:
CTB35
Mar Jun Sep Dec
SOC JOC:
Ceri7dPF
Begin:
6/1/2017
Chr Monit: 4.5%
NonComp:
7Q10:
13
PF:
IWC:
1.41 Freq: Q
J
F M
A M
J
J
A
S
O
N
D
2016
-
- Pass
- -
Pass
-
-
Pass
-
-
Pass
2017
-
- Pass
- -
Pass
-
-
Pass
-
-
Pass
2018
-
- Pass
- -
Pass
-
-
Pass
-
-
Pass
2019
-
- Pass
- -
Pass
-
-
Pass
-
-
Pass
Lincolnton WWTP
NCO025496/001
County: Lincoln
Region: MRO
Basin:
CTB35
Mar Jun Sep Dec
SOC JOC:
Ceri7dPF
Begin:
11/1/2016 chr lim: 6% (3.5MGD)
NonComp: Single
7Q10:
77.0
PF: 6.0
IWC:
11.0 Freq: Q
J
F M
A M
J
J
A
S
O
N
D
2016
-
>22(P) Passlnvalid
>22(P) >22(P)
Pass
-
-
Pass
-
-
Pass >22(P)
2017
-
- Pass
- -
Pass
-
-
Pass >100(P)
-
-
Pass
2018
-
- Pass >12(P)
- -
Pass
-
-
Pass Pass
-
-
Pass
2019
-
- Pass
- -
Pass >12(P)
-
-
Pass
-
-
Pass
Linville Resorts, Inc.
NCO039446/001
County: Avery
Region: ARO
Basin:
CTB30
Jan Apr Jul Oct
SOC JOC:
Ceri7dPF
Begin:
2/1/2015
Chr Lim: 10%
NonComp: Single
7Q10:
2.1
PF: 0.15
IWC:
10.0 Freq: Q
J
F M
A M
J
J
A
S
O
N
D
2016
Pass
- -
Pass -
-
Pass
-
-
Pass
-
-
2017
Pass
- -
Pass -
-
Pass
-
-
Pass
-
-
2018
Pass
- -
Pass -
-
Pass
-
-
Pass
-
-
2019
Pass
- -
Pass -
-
Pass
-
-
Pass
-
-
2020
Pass
- -
- -
-
-
-
-
-
-
-
Lithium Corp
NC0005177/001
County: Gaston
Region: MRO
Basin:
CTB37
Jan Apr Jul Oct
SOC JOC:
Cer7dChV
Begin:
9/1/2018
Chr Lim: 78%
NonComp: Single
70,10:
0.27
PF: 0.615
IWC:
78 Freq: Q
J
F M
A M
J
J
A
S
O
N
D
2016
>100
- -
>100 -
-
H
H
H
>100
-
-
2017
>100
- -
>100 -
-
H
H
-
>100
-
-
2018
H
- H
>100 -
-
H
-
>100
>100
-
-
2019
>100
- -
>100 -
-
>100
-
-
H
-
-
2020
>100
- -
- -
-
-
-
-
-
-
-
Louisburg WWTP
NCO020231/001
County: Franklin
Region: RRO
Basin:
TAR01
Mar Jun Sep Dec
SOC JOC:
Ceri7dPF
Begin:
3/1/2016
chr lim: 13%
NonComp: Single
7Q10:
14.0
PF: 1.37
IWC:
13 Freq: Q
J
F M
A M
J
J
A
S
O
N
D
2016
-
- Pass
- -
Pass
-
-
Pass
-
-
Pass
2017
-
- Pass
- -
Pass
-
-
Pass
-
-
Pass
2018
-
- Pass >52(P)
- -
Pass >52(P)
-
-
Pass >52(P)
-
-
Pass >52(P)
2019
-
- Pass
- -
Pass
-
-
Pass
-
-
Pass
Leeend: P= Fathead minnow (Pimohales oromelas). H=No Flow (facilitv is active). s = Solit test between Certified Labs Page 65 of 117

MONITORING REPORT(MR) VIOLATIONS for:
Permit: nc0085588 MRS Betweel 4 - 2015 and 4 - 2020 Region: %
Facility Name: % Param Nam(% County: %
Major Minor: %
Report Date: 04/21/2C Page 1 of 1
Violation Category:% Program Category:
Subbasin: % Violation Action: %
PERMIT: FACILITY: COUNTY: REGION:
MONITORING VIOLATION UNIT OF CALCULATED %
REPORT LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION

ROY COOPER
Gavfrrror
MICHAEL S. REGAN
. NOO Y
S. DANIEL SMITH
vorfew
r4ORTH CAROLINA
Enwbr utmenfal Q=Hty
March 5, 2020
Mr. Robert Pearson, Public Works Director
City of Lincolnton
P.O. Box 617
Lincolnton, NC 28093-0617
Subject: Compliance evaluation Inspection
City of Lincolnton WTP
NPDES Permit No. NCO085588
Lincoln County
Dear Mr. Pearson:
Enclosed is a copy of the Compliance Evaluation Inspection conducted at the subject
facility on February 26, 2020, by Ori Tuvia. Your cooperation during the site visit was much
appreciated. Please advise the staff involved with this NPDES Permit by forwarding a copy of
the enclosed report.
The report should be self-explanatory; however, should you have any questions
concerning this report, please do not hesitate to contact Ori Tuvia at [phone], or at
ori.tuviagncdenr. gov.
Sincerely,
Docuftned by:
Aoa� H P,. 4,t4 for
F161 FB69AMUA3...
W. Corey Basinger
Regional Supervisor
Mooresville Regional Office
Division of Water Resources
cc: NPDES, MRO files (Laserfiche)
State of North Carolina I Environmental Quality I Water Resources I Water Quality Regional Operations
Mooresville Regional Office 1 610 East Center Avenue, Suite 3011 Mooresville, North Carolina 28115
704 663 1699

United States Environmental Protection Agency
Form Approved.
EPA Washington, D.C. 20460
OMB No. 2040-0057
Water Compliance Inspection Report
Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 IN 2 15 1 3 I NCo085588 111 12 I 20/02/27 I17 18 i d 19 i G i 201
21111111111111111111111111111111111111111111 f6
Inspection
Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved -------------------
67
1.0 70 71 [.. I 72 l-1 L �, � 73 L_LJ74 751 1 1 1 1 LU80
LJ
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
Entry Time/Date
Permit Effective Date
POTW name and NPDES oermit Number)
10:30AM 20/02/27
17/06/01
Lincolnton WTP
1338 Reepsville Rd
Exit Time/Date
Permit Expiration Date
Lincolnton NC 28093
11:20AM 20/02/27
20/07/31
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
Other Facility Data
Robert Worth Pearson/ORC/704-736-8970/
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Stephen H Peeler,PO Box 617 Lincolnton NC 280930617H704-736-8980/7047368959
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit Flow Measurement Operations & Maintenance Records/Reports
Self -Monitoring Program Sludge Handling Disposal Facility Site Review Effluent/Receiving Waters
Laboratory
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date
DocuSigned by:
Ori ATuvia DWR/MRO WQ/704-663-1699/ 3/5/2020
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Nu Pocusigned by: Date
7A*-.uo H P,�Uft 3. 5. 2020
Andrew Pitner DWR/MRO WQ/704-663-1699 Ext.2180/
1`161 FB69AMUAI..
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page#

NPDES yr/mo/day Inspection Type
NCO085588 I� 12, 20/02/27 117 18 u
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Page#

Permit: NCO085588 Owner - Facility: Lincolnton WTP
Inspection Date: 02/27/2020 Inspection Type: Compliance Evaluation
Permit
Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new
0
❑
❑
❑
application?
Is the facility as described in the permit?
M
❑
❑
❑
# Are there any special conditions for the permit?
❑
0
❑
❑
Is access to the plant site restricted to the general public?
0
❑
❑
❑
Is the inspector granted access to all areas for inspection?
0
❑
❑
❑
Comment: The subject permit expires on 7/31/2020. The permittee was in the process of submitting a
renewal application.
Record Keeping
Yes No NA NE
Are records kept and maintained as required by the permit?
0
❑
❑
❑
Is all required information readily available, complete and current?
0
❑
❑
❑
Are all records maintained for 3 years (lab. reg. required 5 years)?
0
❑
❑
❑
Are analytical results consistent with data reported on DMRs?
0
❑
❑
❑
Is the chain -of -custody complete?
0
❑
❑
❑
Dates, times and location of sampling
Name of individual performing the sampling
Results of analysis and calibration
Dates of analysis
Name of person performing analyses
Transported COCs
Are DMRs complete: do they include all permit parameters?
❑
❑
❑
Has the facility submitted its annual compliance report to users and DWQ?
❑
❑
0
❑
(If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified operator
❑
❑
0
❑
on each shift?
Is the ORC visitation log available and current?
0
❑
❑
❑
Is the ORC certified at grade equal to or higher than the facility classification?
0
❑
❑
❑
Is the backup operator certified at one grade less or greater than the facility classification?
M
❑
❑
❑
Is a copy of the current NPDES permit available on site?
0
❑
❑
❑
Facility has copy of previous year's Annual Report on file for review?
❑
❑
0
❑
Comment: The records reviewed durina the inspection were oraanized and well maintained. DMRs
COCs, calibration logs and ORC visitation logs were reviewed for the period May 2019
through December 2020. At the time of the inspection it was discovered that the quarterly
metal sampling have been accidently reported in uq/I rather than Mg/l, the ORC has revised
all EDMr's going back to March 2017.
Page# 3

Permit: NCO085588 Owner - Facility: Lincolnton WTP
Inspection Date: 02/27/2020 Inspection Type: Compliance Evaluation
Laboratory
Yes No NA NE
Are field parameters performed by certified personnel or laboratory?
0
❑
❑
❑
Are all other parameters(excluding field parameters) performed by a certified lab?
0
❑
❑
❑
# Is the facility using a contract lab?
0
❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
0
❑
❑
❑
Celsius)?
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees?
❑
❑
0
❑
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees?
❑
❑
0
❑
Comment: On -site field analvses (DH and total residual chlorine) are performed under the facilitv's field
laboratory certification #5060. The City's WWTP lab performs the total suspended solids
(TSS) analyses, and Meritech, Inc. (metals, turbidity, hardness and toxicity) have also been
contracted to provide analytical support. The laboratory instrumentation used for field
analyses appeared to be properly calibrated/verified and documented
Effluent Sampling
Yes No NA NE
Is composite sampling flow proportional?
❑
❑
0
❑
Is sample collected below all treatment units?
0
❑
❑
❑
Is proper volume collected?
0
❑
❑
❑
Is the tubing clean?
❑
❑
0
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
❑
❑
0
❑
Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type
0
❑
❑
❑
representative)?
Comment: The subject permit requires effluent grab samples.
Upstream / Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit (frequency, sampling type, and 0 ❑ ❑ ❑
sampling location)?
Comment:
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? 0 ❑ ❑ ❑
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable ❑ ❑ 0 ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment: The facility appeared to be properly operated and well maintained.
Lagoons Yes No NA NE
Type of lagoons?
Page# 4

Permit: NC0085588 Owner - Facility: Lincolnton WTP
Inspection Date: 02/27/2020 Inspection Type: Compliance Evaluation
Lagoons
Yes No NA NE
# Number of lagoons in operation at time of visit?
1
Are lagoons operated in?
# Is a re -circulation line present?
❑
❑
0
❑
Is lagoon free of excessive floating materials?
0
❑
❑
❑
# Are baffles between ponds or effluent baffles adjustable?
❑
❑
0
❑
Are dike slopes clear of woody vegetation?
❑
❑
0
❑
Are weeds controlled around the edge of the lagoon?
0
❑
❑
❑
Are dikes free of seepage?
0
❑
❑
❑
Are dikes free of erosion?
0
❑
❑
❑
Are dikes free of burrowing animals?
0
❑
❑
❑
# Has the sludge blanket in the lagoon (s) been measured periodically in multiple
❑
❑
0
❑
locations?
# If excessive algae is present, has barley straw been used to help control the growth?
❑
❑
0
❑
Is the lagoon surface free of weeds?
0
❑
❑
❑
Is the lagoon free of short circuiting?
0
❑
❑
❑
Comment: The facility is equipped with a concrete -lined sludge holding lagoon. The high water alarm
system is connected to the on -site SCADA system
De -chlorination
Yes No NA NE
Type of system ?
Liquid
Is the feed ratio proportional to chlorine amount (1 to 1)?
❑ ❑
0
❑
Is storage appropriate for cylinders?
❑ ❑
0
❑
# Is de -chlorination substance stored away from chlorine containers?
0 ❑
❑
❑
Comment:
Are the tablets the proper size and type? ❑ ❑ 0 ❑
Are tablet de -chlorinators operational? ❑ ❑ 0 ❑
Number of tubes in use?
Comment:
Pump Station - Effluent
Yes No NA NE
Is the pump wet well free of bypass lines or structures?
❑
❑
❑
Are all pumps present?
❑
❑
❑
Are all pumps operable?
❑
❑
❑
0
Page# 5

Permit: NCO085588
Inspection Date: 02/27/2020
Owner - Facility: Lincolnton WTP
Inspection Type: Compliance Evaluation
Pump Station - Effluent
Yes No NA NE
Are float controls operable?
❑
❑
❑
Is SCADA telemetry available and operational?
❑
❑
❑
Is audible and visual alarm available and operational?
❑
❑
❑
Comment: Did not inspect.
Effluent Pipe
Yes No NA NE
Is right of way to the outfall properly maintained?
0
❑
❑
❑
Are the receiving water free of foam other than trace amounts and other debris?
0
❑
❑
❑
If effluent (diffuser pipes are required) are they operating properly?
❑
❑
❑
Comment: The effluent appeared clear with no floatable solids or foam.
Solids Handling Equipment
Yes No NA NE
Is the equipment operational?
M
❑
❑
❑
Is the chemical feed equipment operational?
0
❑
❑
❑
Is storage adequate?
0
❑
❑
❑
Is the site free of high level of solids in filtrate from filter presses or vacuum filters?
❑
❑
0
❑
Is the site free of sludge buildup on belts and/or rollers of filter press?
❑
❑
0
❑
Is the site free of excessive moisture in belt filter press sludge cake?
0
❑
❑
❑
The facility has an approved sludge management plan?
0
❑
❑
❑
Comment: Sludae is dewatered by a centrifuae. Dewatered sludae is transDorted (bv City Dersonnel) to
the Lincoln County Landfill for final disposal. The centrate from the centrifuge is returned
back to the sludge holding lagoon. The City is also permitted to land apply the facility's
sludge under the authority of Permit WQ0002712. Synagro has been contracted to land
apply the sludge.
Page# 6

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
City of Lincolnton
Attn: Robert Pearson, Water Resources Dir.
PO Box 617
Lincolnton, NC 28093
Subject: Permit Renewal
Application No. NCO085588
Lincolnton WTP
Lincoln County
Dear Applicant:
NORTH CAROLINA
Environmental Quality
March 05, 2020
The Water Quality Permitting Section acknowledges the March 3, 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://dgg.nc.ciov/permits-regulations/permit-quidance/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 Tedford
Administrative Assistant
Water Quality Permitting Section
cc: Central Files w/application
ec: WQPS Laserfiche File w/application
E 21 NorthCs to, raDepart mentaFEnvronmerta'Qae'ty I D�vsonofWater Resouroes
Mooresv' a Reg vrta! Office 160 fast Center Avenue, Sate 3O1 I Nooresv, ie, North Cero: as 28115

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Mail the complete application to:
N. C. DENR / Division of Water Resources / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number INCO085588
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
City of Lincolnton
Lincolnton Water Treatment Plant e ,% 1r:n
1338 Reepsville Road
Lincolnton MAR 0 3 2020
NC 28092 NCDEQ/DWR/NPDES
[phone]
[phone]
2. Location of facility producing discharge:
Check here if same as above
Street Address or State Road
City
State / Zip Code
County
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 ORQ
Name City of Lincolnton—Robert Pearson
Mailing Address 1338 Reepsville Road
City Lincolnton
State / Zip Code NC 28092
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑
State ❑
Private ❑
Page 1 of 4 Version 3/2014

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
5. Type of treatment plant:
® 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:
Mixing, Flocculation, Sedimentation, Filtration, Sludge Dewatering
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
Sludge is generated by the pretreatment and sedimentation processes. The sludge for
pretreatment and sedimentation processes is automatically collected and discharged to a
sludge holding lagoon. The filter backwash is discharged to the sludge holding lagoon, The
combined sludge and backwash flows are gravity thickened. The thickened sludge is then
pumped to a sludge dewatering process. The dewatering process uses a centrifuge to
dewater the sludge. The overflow from the dewatering process is returned to the lagoon.
The lagoon is decanted using a floating decanter. The overflow is dechlorinated and
discharged to the South Fork Catawba River.
9. Number of separate discharge points: 1 Outfall Identification number(s) 001
10. Frequency of discharge: Continuous ❑
If intermittent:
Days per week discharge occurs: 7 days
Intermittent
Duration: 9.00
11. Plant design potable flow rate 12.0 MGD
Backwash or reject flow 0.350 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude
South Fork Catawba River
13. Please list all water treatment additives, including cleaning chemicals or disinfection
treatments that have the potential to be discharged.
Page 2 of 4 Version 3/2014

r
NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Alum / aluminum sulfate Yes X No
Iron sulfate / ferrous sulfate Yes No X
Fluoride Yes X No
Ammonia nitrogen / Chloramines Yes No X
Zinc -orthophosphate or sweetwater CP1236 Yes X No
List any other additives below:
Caustic Soda, Polymers, Chlorine, Activated Carbon, Sodium Bi-sulfite
14. Is this facility located on Indian country? (check one)
Yes ❑ No
15. Additional Information:
v 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.
Robert W Pearson Water Resources Director
Priroold name of Persati Signing Title
of Applicant
Date
RA
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
Page 3 of 4
Version 3/2014

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
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 4 of 4 Version 3/2014

Latitude: 35' 28'52" NPDES PERMIT NCO085588
#10* Longitude 81' 16'59" City of Lincolnton
Quad • 1131E
E:5�9"
Stream Class: WS-IV WTP
Pease Subbasin: 30835
Architects — Engineers Receiving Stream; South Fork Catawba River Pease Commission No. 2010004.00

NPDES Permit NCO085588
City of Lincolnton WTP
Lincoln County
Description of Sludge Management Plan
The water treatment plant utilizes the following principal treatment process:
• Raw water pre -settling basin
• Actiflow raw water pretreatment (ballasted flocculation)
• Conventional Flocculation
• Conventional Sedimentation
• Conventional Filtration
Sludge is generated by the pretreatment and sedimentation processes. The sludge for the
pretreatment and sedimentation processes is automatically collected and discharged to a sludge
holding lagoon.
The filter backwash is also discharged to the sludge holding lagoon. The combined sludge and
backwash flows are gravity thickened. The thickened sludge is pumped to a sludge dewatering
process. The dewatering process utilizes a centrifuge to dewater the sludge. The centrifuge
capabilities are as follows:
• Input 40 to 50 gpm
• Feed Concentration 2% TS
• Bowl Speed 4,000 RPM
• Drive Size 40 HP
The dewatered sludge is conveyed to a truck and is hauled to the Lincoln County landfill for
disposal.
The overflow from the centrifuge is returned to the lagoon. The lagoon is decanted utilizing a
floating decanter. The overflow from the decanter is discharged to the South Fork Catawba
River in accordance with the effluent limitations, monitoring requirements and other conditions
of the NPDES permit.