NC0020737_Technical Correction_20200121

ROY COOPER
Governor
MICHAEL S. REGAN
secretary
LINDA CULPEPPER
Director
NORTH CAROLINA
Environmental Quality
January 21, 2020
Mr. Ricky Duncan, Water Resources Director
City of Kings Mountain
P.O. Box 429
Kings Mountain, North Carolina 28086
Subject: NPDES Permit Technical Correction
Permit NCO020737
Pilot Creek WWTP
Cleveland County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Duncan:
The Division issued a final permit for your facility on January 7, 2020. The Division became aware
that Special Conditions A.(1) through A. (3) Effluent Limitations and Monitoring Requirements
for flow tiers 3.0 MGD, 4.0 MGD, and 6.0 MGD had errors in the sample type for Total Cyanide
and Hardness (upstream), as both should be "Grab" samples. Accordingly, we hereby forward the
modified permit pages to amend your permit. Please insert these changed pages into your existing
permit and discard the old pages.
All other terms and conditions in the original permit remain unchanged and in full effect. These
modifications are issued pursuant to the requirements of North Carolina General Statute 143-215.1
and the Memorandum of Agreement between North Carolina and the U.S. Environmental
Protection Agency dated December 6, 1983.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within
thirty (30) days following receipt of this letter. This request must be in the form of a written
petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-
6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect
the legal requirements to obtain other permits which may be required by the Division of Water
Resources or any other Federal, State, or Local governmental regulations.
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617
NORfFI URpLINq i
oaoir��a�cn� 919.707.9000

If you have any questions concerning this permit, please contact Cassidy Kurtz at [phone]
or via email at [e-mail].
Sincerely,
inda Culp'per, ector
p
Division of Water Resources, NCDEQ
Hardcopy: NPDES Files
Central Files
Ecopy: US EPA Region 4
DWR / Mooresville Regional Office / Water Quality
DWR Aquatic Toxicology Branch / Hannah Headrick
DWR / PERCS / Vivien Zhong
City of Kings Mountain / Pilot Creek WWTP Superintendent / Richelle Meek
Page 2 of 2

Permit NCO020737
Part I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (3.0 MGD)
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
Grade IV Biological WPCS [15A NCAC 08G .0302]
During the period beginning on the effective date of this permit and lasting until the twelve (12) month average
flow exceeds 2.7 MGD or permit expiration, the Permittee is authorized to discharge treated wastewater through
Outfall 001. Such discharges shall be limited and monitored' by the Permittee as specified below:
Effluent Characteristics
Parameter Code
Discharge Limitations
Monitoring Requirements
Monthly
Avera a
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location z
Flow 50050
3.0 MGD
Daily
Recording
I or E
BOD, 5-day, 20°C
(April 1 — October 31) 3 C0310
28.0 mg/L
42.0 mg/L
Daily
Composite
I and E
BOD, 5-day, 20°C
(November 1 —March 31) 3 C0310
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
Total Suspended Solids 3 C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3-N as N
(April 1 — October 31) C0610
2.6 mg/L
7.8 mg/L
Daily
Composite
E
NH3-N as N
(November 1—March 31) C0610
8.9 mg/L
26.7 mg/L
Daily
Composite
E
pH 00400
Between 6.0 and 9.0 standard units
Daily
Grab
E
Dissolved Oxygen 00300
Daily Average not less than 5.0 mg/L
Daily
Grab
E
Fecal Coliform
31616
(geometric mean)
200/100m1
400/100m1
Daily
Grab
E
Total Residual Chlorine 4 50060
28 µg/L
Daily
Grab
E
Total Nitrogen 5 C0600
Monitor and report (mg/L)
Quarterly
Composite
E
Total Phosphorus C0665
Monitor and report (mg/L)
Quarterly
Composite
E
Total Arsenic (µg/L) 6 01002
Quarterly
Composite
E
Total Cyanide (µg/L) 6 00720
Quarterly
Grab
E
Total Molybdenum 6 01062
10.2 mg/L
10.2 mg/L
Monthly
Composite
E
Total Selenium 6 01147
25.4 µg/L
245.0 µg/L
Monthly
Composite
E
Total Thallium 6 01059
10.2 µg/L
10.2 µg/L
Monthly
Composite
E
Hardness - Total as CaCO3 00900
(mg/L)
Quarterly
Composite
E
Chronic Toxicity 7 TGP3B
Quarterly
Composite
E
Dissolved Oxygen (mg/L) 00300
Footnote 8
Grab
U and D
Temperature (°C) 00010
Footnote 8
Grab
U and D
Conductivity (µmhos/cm) 00094
Footnote 8
Grab
U and D
Haardn) s9s - Total as CaCO3 00900
Quarterly
Grab
U
Effluent Pollutant Scan NCO]
Monitor and report
Footnote 10
Footnote 10
E
Notes: See next page
Page 3 of 13

Permit NC0020737
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see A. (7)].
2. Sample locations: I — Influent; E — Effluent; U — Upstream 100 yards above outfall; D — Downstream at NC SR
1103.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. Total residual chlorine shall be monitored only if chlorine is added to the treatment process. The Division shall
consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the
permittee shall continue to record and submit all values reported by a North Carolina certified laboratory.
5. TN = TKN + NO3-N + NO2-N where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N +
NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. Metal sampling shall be performed in conjunction with total hardness effluent sampling, and reported to the
targeted Practical Quantitation Limit.
7. Chronic Toxicity (Ceriodaphnia) limit at 20.0 % with testing in January, April, July and October [see A. (4)].
8. Instream samples shall be grab samples collected three times per week during the months of June, July, August
and September then once per week during the remaining months of the year.
9. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the receiving stream. If the permittee is a member of a monitoring coalition
program, sampling for instream hardness may be waived as long as the monitoring coalition agrees to sample
hardness at the nearest upstream location, at a minimum frequency of quarterly, and the permittee has obtained
approval from DWR-NPDES Permitting Unit that the upstream station being monitored by the Coalition is
representative of the receiving stream for this discharge. The permittee is responsible for submitting instream
hardness test results with its permit renewal application package. If Coalition membership is cancelled or the
,Coalition terminates instream hardness sampling at the approved station, the permittee will immediately notify
the Division and resume sampling for instream hardness upstream of its discharge.
10. The permittee shall perform three effluent pollutant scans during the term of this permit [See A. (5)].
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 13

Permit NCO020737
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (4.0 MGD)
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
Grade IV Biological WPCS [15A NCAC 08G .0302]
During the period beginning when the twelve (12) month average flow exceeds 2.7 MGD and lasting until the
twelve (12) month average flow exceeds 3.6 MGD or permit expiration, the Permittee is authorized to discharge
treated wastewater through Outfall 001. Such discharges shall be limited and monitored' by the Permittee as
specified below:
Effluent Characteristics
Parameter Code
Discharge Limitations
Monitoring Requirements
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location z
Flow 50050
4.0 MGD
Daily
Recording
I or E
BOD, 5-day, 200C C0310
(April 1 — October 31) 3
28.0 mg/L
42.0 mg/L
Daily
Composite
I and E
BOD, 5-day, 20°C
(November 1 —March 31) 3 C0310
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
Total Suspended Solids 3 C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3-N as N
(April 1 — October 31) C0610
2.6 mg/L
7.8 mg/L
Daily
Composite
E
NH3-N as N
(November 1 —March 31) C0610
8.9 mg/L
26.7 mg/L
Daily
Composite
E
pH 00400
Between 6.0 and 9.0 standard units
Daily
Grab
E
Dissolved Oxygen 00300
Daily Average not less than 5.0 mg/L
Daily
Grab
E
Fecal Coliform 31616
(geometric mean)
200/100ml
400/100m1
Daily
Grab
E
Total Residual Chlorine 4 50060
28 µg/L
Daily
Grab
E
Total Nitrogen 5 C0600
Monitor and report (mg/L)
Quarterly
Composite
E
Total Phosphorus C0665
Monitor and report (mg/L)
Quarterly
Composite
E
Total Arsenic (µg/L) 6 01002
Quarterly
Composite
E
Total Cyanide (µg/L) 6 00720
Quarterly
Grab
E
Total Molybdenum 6 01062
8.13 mg/L
8.13 mg/L
Monthly
Composite
E
Total Selenium 6 01147
20.3 µg/L
197.7 µg/L
Monthly
Composite
E
Total Thallium 6 01059
8.13 µg/L
8.13 µg/L
Monthly
Composite
E
Hardness - Total as CaCO3 00900
(mg/L)
Quarterly
Composite
E
Chronic Toxicity TGP3B
Quarterly
Composite
E
Dissolved Oxygen (mg/L) 00300
Footnote 8
Grab
U and D
Temperature (°C) 00010
Footnote 8
Grab
U and D
Conductivity (µmhos/cm) 00094
Footnote 8
Grab
U and D
Hardness - Total as CaCO3 00900
m
(mg/L)
Quarterly
Grab
U
Effluent Pollutant Scan NC01
Monitor and report
Footnote 10
Footnote 10
E
Notes: See next page
Page 5 of 13

Permit NC0020737
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see A. (7)].
2. Sample locations: I —Influent; E —Effluent; U — Upstream 100 yards above outfall; D —Downstream at NCSR
1103.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. Total residual chlorine shall be monitored only if chlorine is added to the treatment process. The Division shall
consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the
permittee shall continue to record and submit all values reported by a North Carolina certified laboratory.
5. TN = TKN + NO3-N + NO2-N where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N +
NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. Metal sampling shall be performed in conjunction with total hardness effluent sampling, and reported to the
targeted Practical Quantitation Limit.
7. Chronic Toxicity (Ceriodaphnia) limit at 24.6 % with testing in January, April, July and October [see A. (4)].
8. Instream samples shall be grab samples collected three times per week during the months of June, July, August
and September then once per week during the remaining months of the year.
9. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the receiving stream. If the permittee is a member of a monitoring coalition
program, sampling for instream hardness may be waived as long as the monitoring coalition agrees to sample
hardness at the nearest upstream location, at a minimum frequency of quarterly, and the permittee has obtained
approval from DWR-NPDES Permitting Unit that the upstream station being monitored by the Coalition is
representative of the receiving stream for this discharge. The permittee is responsible for submitting instream
hardness test results with its permit renewal application package. If Coalition membership is cancelled or the
Coalition terminates instream hardness sampling at the approved station, the permittee will immediately notify
the Division and resume sampling for instream hardness upstream of its discharge.
10. The permittee shall perform three effluent pollutant scans during the term of this permit [See A. (5)].
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 6 of 13

Permit NCO020737
A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (6.0 MGD)
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
Grade IV Biological WPCS [15A NCAC 08G .0302]
During the period beginning when the twelve (12) month average flow exceeds 4.5 MGD and lasting until
permit expiration, the Permittee is authorized to discharge treated wastewater through Outfall 001. Such
discharges shall be limited and monitored' by the Permittee as specified below:
Effluent Characteristics
Parameter Code
Discharge Limitations
Monitoring Requirements
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location z
Flow 50050
6.0 MGD
Daily
Recording
I or E
BOD, 5-day, 20°C
(April 1 — October 31) 3 C0310
28.0 mg/L
42.0 mg/L
Daily
Composite
I and E
BOD, 5-day, 20°C
(November 1 — March 31) 3 C0310
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
Total Suspended Solids 3 C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3-N as N
(April 1 — October 31) C0610
2.6 mg/L
7.8 mg/L
Daily
Composite
E
NH3-N as N
(November 1—March 31) C0610
8.9 mg/L
26.7 mg/L
Daily
Composite
E
pH 00400
Between 6.0 and 9.0 standard units
Daily
Grab
E
Dissolved Oxygen 00300
Daily Average not less than 5.0 mg/L
Daily
Grab
E
Fecal Coliform 31616
(geometric mean)
200/100ml
400/100ml
Daily
Grab
E
Total Residual Chlorine 4 50060
28 µg/L
Daily
Grab
E
Total Nitrogen s C0600
Monitor and report (mg/L)
Quarterly
Composite
E
Total Phosphorus C0665
Monitor and report (mg/L)
Quarterly
Composite
E
Total Arsenic (µg/L) 6 01002
184.2 µg/L
913.6 µg/L
Monthly
Composite
E
Total Cyanide (µg/L) 6 00720
Quarterly
Grab
E
Chlorides 00940
Quarterly
Composite
E
Total Molybdenum 6 01062
6.1 mg/L
6.1 mg/L
Monthly
Composite
E
Total Selenium 6 01147
15.2 µg/L
150.5 µg/L
Monthly
Composite
E
Total Thallium 6 01059
6.1 µg/L
6.1 µg/L
Monthly
Composite
E
Hardness - Total as CaCO3 00900
(mg/L)
Quarterly
Composite
E
Chronic Toxicity 7 TGP3B
Quarterly
Composite
E
Dissolved Oxygen (mg/L) 00300
Footnote 8
Grab
U and D
Temperature (°C) 00010
Footnote 8
Grab
U and D
Conductivity (µmhos/cm) 00094
Footnote 8
Grab
U and D
Hardness - Total as CaCO3 00900
Quarterly
Grab
U
Effluent Pollutant Scan NC01
Monitor and report
Footnote 10
Footnote 10
E
Notes: See next page
Page 7 of 13

Permit NCO020737
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see A. (7)].
2. Sample locations: I — Influent; E — Effluent; U — Upstream 100. yards above outfall; D — Downstream at NCSR
1103.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. Total residual chlorine shall be monitored only if chlorine is added to the treatment process. The Division shall
consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the
permittee shall continue to record and submit all values reported by a North Carolina certified laboratory.
5. TN = TKN + NO3-N + NO2-N where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N +
NO2-N are Nitrate and Nitrite Nitrogen, respectively.
6. Metal sampling shall be performed in conjunction with total hardness effluent sampling, and reported to the
targeted Practical Quantitation Limit.
7. Chronic Toxicity (Ceriodaphnia) limit at 33.0 % with testing in January, April, July and October [see A. (4)].
8. Instream samples shall be grab samples collected three times per week during the months of June, July, August
and September then once per week during the remaining months of the year.
9. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the receiving stream. If the permittee is a member of a monitoring coalition
program, sampling for instream hardness may be waived as long as the monitoring coalition agrees to sample
hardness at the nearest upstream location, at a minimum frequency of quarterly, and the permittee has obtained
approval from DWR-NPDES Permitting Unit that the upstream station being monitored by the Coalition is
representative of the receiving stream for this discharge. The permittee is responsible for submitting instream
hardness test results with its permit renewal application package. If Coalition membership is cancelled or the
Coalition terminates instream hardness sampling at the approved station, the permittee will immediately notify
the Division and resume sampling for instream hardness upstream of its discharge.
10. The permittee shall perform three effluent pollutant scans during the term of this permit [See A. (5)].
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 8of13