NC0020737_Draft Permit_20190921

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ROY COOPER ,c4`� t 1;A
Governor
MICHAEL S.REGAN „..\_ �,^" a
Secretary
LINDA CULPEPPER NORTH CAROLINA
Director Environmental Quality
August 21, 2019
Mr. Ricky Duncan
Water Resources Director
City of Kings Mountain
P.O. Box 429
Kings Mountain, North Carolina 28086
Subject: Draft NPDES Permit Renewal
Permit NC0020737
Pilot Creek WWTP
Cleveland County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Duncan:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
• Per your request, tiered flow pages for 3.0 MGD and 4.0 MGD have been added to the
permit. Effluent limitations and monitoring requirements have been added to these tiered
flow pages [See Sections A. (1) and A. (2)].
• Limits for total thallium have been recalculated using the Division's updated surface
water criteria for thallium in 2018 [See Sections A. (1), A. (2) and A. (3)].
• Limits for total arsenic have been recalculated using the Division's updated surface water
quality standards for arsenic [See Section A. (3)].
• Based on no reasonable potential for total copper and total zinc to exceed water quality
standards, and predicted maximum effluent concentration is less than 50%of allowable
discharge concentration, limits and monitoring for total copper and total zinc have been
removed from the permit.
• Based on no reasonable potential for total cyanide to exceed water quality standards but
predicted maximum effluent concentration is greater than 50% of allowable discharge
DE -j North Carolina Department of Environmental Quality I Division of Water Resources
�� 512 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699-1617
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concentration, limits for total cyanide have been removed from the permit, and
monitoring frequency has been reduced from monthly to quarterly.
• Effluent data for total molybdenum and total selenium showed reasonable potential to
exceed allowable NC Water Quality Standard. Therefore, limits and monthly monitoring
requirement for total molybdenum and total selenium have been added to the permit for
all flow pages [See Sections A. (1),A. (2) and A. (3)].
• Some of the wording has changed in Section A. (4). Chronic Toxicity Permit Limit,please
review carefully. In addition,permit limits for tiered flow pages have been added.
• Special Condition A. (5)has been modified to include the specific three years in which the
Effluent Pollutant Scans shall be performed(2020,2021, and 2022). In addition, at the end
of the Special Condition, 2nd species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.21(j)(5)] have been added.
• Some of the wording has changed in Special Condition A.(6).Mercury Minimization Plan,
please review carefully.The Permittee shall continue implementing mercury minimization
plan during this permit term.
• The NC 2007-2014 Water Quality Standard(WQS)Triennial Review was approved by the
NC Environmental Management Committee(EMC)on November 13, 2014. The US EPA
subsequently approved the WQS revisions on April 6,2016 with some exceptions.The NC
Division of Water Resources NPDES Permitting Unit is required to implement the new
dissolved metal standards in all permits public noticed after April 6, 2016. The new
standards for most metals include acute standards. Further, the freshwater standards for
several metals are expressed as the dissolved form of the metals, and seven metals have
hardness-dependent equations. As a result, the NPDES Permitting Unit will need site-
specific effluent hardness data and instream hardness data, upstream of the discharge, for
each facility monitoring these metals in order to calculate permit limitations. Effluent
hardness and instream hardness sampling, upstream of the discharge, has been added to
this permit at a monitoring frequency of quarterly.
• Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs)and program reports.The requirement to continue reporting discharge monitoring
data electronically using the NC DWR's Electronic Discharge Monitoring Report(eDMR)
internet application has been updated in the permit. [See Special Condition A. (7)]
• Regulatory citations have been added to the permit.
The NPDES standard conditions (Parts II, III, and IV) are not included with this draft. The
conditions are the same as in your current permit except that agency and division names have
been updated. The latest version is available at https://bit.ly/2BZ4xxx and can be viewed online
or downloaded as a PDF file.
Page 2of3

Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Cleveland County area, soliciting public comments on this draft permit.
Please provide any written comments you may have to the following: NCDEQ/DWR,NPDES
Permitting Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 no later than 30 days
after receipt of this draft permit.
Following the 30-day public comment period, the Division will review all pertinent comments
and take appropriate action prior to issuing a final permit. If you have questions concerning this
draft permit, please call me at [phone] or Cassidy Kurtz at [phone] or email at
[e-mail].
Sincerely,
1;-r-;,)
Bing Bai, Engineer
NPDES Complex Permitting Unit
cc: NPDES Files
Central Files
ec: US EPA Region 4
DWR/Mooresville Regional Office/Water Quality
DWR/Aquatic Toxicology Branch/Hannah Headrick
DWR/Operator Certification Program/Maureen Kinney
Page 3 of 3

Permit NC0020737
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act,as amended,
City of Kings Mountain
is hereby authorized to discharge wastewater from a facility located at the
Pilot Creek WWTP
200 Potts Creek Road
Kings Mountain
Cleveland County
to receiving waters designated as Buffalo Creek in the Broad River Basin in accordance with effluent limitations,
monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective Month XX,2019.
This permit and authorization to discharge shall expire at midnight on August 31, 2023.
Signed this day Month XX,2019.
Draft
Linda Culpepper, Director
Division of Water Resources
By Authority of the Environmental Management Commission

Permit NC0020737
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility,whether for operation or discharge are herebyrevoked,and as
P g
of this issuance,any previously issued permit bearing this number is no longer effective.Therefore,the exclusive
authority to operate and discharge from this facility arises under the permit conditions,requirements,terms,and
provisions included herein.
The City of Kings Mountain is hereby authorized to:
1. Continue to operate a 6.0 MGD wastewater treatment facility consisting of the following components:
• dual screw pumps
• mechanical bar screen
• parshall flume with recorder
• flow diversion
• three(3)aeration basins with diffused air
• three(3)secondary clarifiers
• three(3)chlorine contact basins ��
• caustic feed system
• effluent measuring devices for each chlorine contact basin and a totalizer/recorder for the combined
effluent
• dechlorination unit
• two(2)aerobic digesters
• two(2)sludge drying beds and
• belt press for dewatering waste sludge
The facility is located at the Pilot Creek WWTP, on 200 Potts Creek Road in Kings Mountain, Cleveland
County; and
2. Upon notifying the Mooresville Regional Office and NPDES Complex Permitting Unit with flow increase
and receiving of approval from the Division,operate wastewater treatment facilities with treatment capacities
of 4.0 MGD and 6.0 MGD; and
3. Discharge from said treatment works via Outfall 001,at the location specified on the attached map into the
Buffalo Creek currently classified as C waters in subbasin 03-08-05 [HUC: 03050105] of the Broad River
Basin.
Page 2of13

Permit NC0020737
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 Discharge Limitations Monitoring Requirements
Parameter Code Monthly Weekly Daily Measurement Sample Sample Average Average Maximum Frequency Type Location 2
Flow 50050 3.0 MGD Daily Recording I or E
BOD,5-day,20°C C0310 28.0 mg/L 42.0 mg/L Daily Composite I and E
(April 1 —October 31)3
BOD,5-day,20°C C0310 30.0 mg/L 45.0 mg/L Daily Composite I and E
(November 1 —March 31)3
3 DailyComposite I and E
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L p
NH3-N as N
C0610 2.6 mg/L 7.8 mg/L Daily Composite E
(April 1 —October 31)
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 200/100m1 400/100m1 Daily Grab E
(geometric mean)
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 Composite 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 Quarterly Composite E
(mg/L)
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 Quarterly Grad U
(mg/L)9
Effluent Pollutant Scan NC01 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 100yards above outfall;D—Downstream at NC SR
P P
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 pennittee 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 NC0020737
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 Discharge Limitations Monitoring Requirements
Monthly Weekly Daily Measurement Sample Sample
Parameter Code Average Average Maximum Frequency Type Location 2
Flow 50050 4.0 MGD Daily Recording I or E
BOD,5-day,20°C CO310 28.0 mg/L 42.0 mg/L Daily Composite 1 and E
(April 1—October 31)3
5-day,20°C C0310 30.0 mg/L 45.0 mg/L Daily Composite I and E
(November 1—March 31)3
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 200/100m1 400/100m1 Daily Grab E
(geometric mean)
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 Composite 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 Quarterly Composite E
(mg/1-)
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 Grad U
(mg/0 9
Effluent Pollutant Scan NC01 Monitor and report Footnote 10 Footnote 10 E
Notes:
Page 5 of 13

Permit NC0020737
1. Thepermittee shall submit discharge monitoringreports electronicallyusingthe NC DWR's eDMR
g eP
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 NC0020737
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 Discharge Limitations Monitoring Requirements
Parameter Code Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location 2
Flow 50050 6.0 MGD Daily Recording I or E
BOD, 5-day,20°C
(A ril 1 —October 31)3 C0310 28.0 mg/L 42.0 mg/L Daily Composite I and E
P
BOD,5-day,20°C
C0310 30.0 mg/L 45.0 mg/L Daily Composite I and E
(November 1 —March 31)3
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
C0610 8.9 mg/L 26.7 mg/L Daily Composite E
(November 1 —March 31)
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 200/100m1 400/100m1 Daily Grab E
(geometric mean)
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 184.2 µg/L 913.6 µg/L Monthly Composite E
Total Cyanide(µg/L)6 00720 Quarterly Composite 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 Quarterly Composite E
(mg/L)
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 Grad U
(mg/L)9
Effluent Pollutant Scan NC01 Monitor and report Footnote 10 Footnote 10 E
Notes:
Page 7 of 13

Permit NC0020737
1. The pennittee 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
0
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

Permit NC0020737
A. (4) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration defined as follows:
Permitted flow 3.0 MGD 4.0 MGD 6.0 MGD
Effluent concentration 20.0% 24.6% 33.0%
The permit holder shall perform at a minimum,quarterly monitoring using test procedures outlined in the"North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised December 2010,or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-December 2010)or
willbeperformed duringthe months of January,April,July,and October.
subsequent versions.The tests Y
q
These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent
sampling for this testing must be obtained during representative effluent discharge and shall be performed at the
NPDES permitted fmal effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit,then multiple-concentration testing shall be performed at a minimum, in each of the two
following months as described in"North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure"(Revised-December 2010)or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form(MR-1)for the months in which tests were performed,using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original)is to be sent to the
following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after
the end of the reporting period for which the report is made.
Test data shall be complete,accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,the
permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating the
facility name,permit number,pipe number,county, and the month/year of the report with the notation of"No
Flow"in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address
cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,monitoring will be
required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter,
which is the three month time interval that begins on the first day of the month in which toxicity testing is required
by this permit and continues until the fmal day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Resources indicate potential impacts to the receiving stream,this permit may be re-opened and modified to include
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival,minimum control organism reproduction,and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
Page 9 of 13

Permit NC0020737
A. (5) EFFLUENT POLLUTANT SCAN
[G.S. 143-215.1(b)]
The Permittee shall perform a total of three(3)Effluent Pollutant Scans for all parameters listed below. One scan must
be performed in each of the following years: 2020,2021,and 2022. Analytical methods shall be in accordance with
40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are present in concentrations greater
than applicable standards and criteria. Samples should be collected with one quarterly toxicity test each year,and must
represent seasonal variation [i.e., do not sample in the same quarter every year]. Unless otherwise indicated, metals
shall be analyzed as"total recoverable."
Ammonia(as N) Trans-1,2-dichloroethylene Bis(2-chloroethyl)ether
Chlorine(total residual,TRC) 1,1-dichloroethylene Bis(2-chloroisopropyl)ether
Dissolved oxygen 1,2-dichloropropane Bis(2-ethylhexyl)phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1,1,2,2-tetrachioroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead Acid-extractable compounds: Diethyl phthalate
Mercury(EPA Method 1631 E) P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachlorobutadiene
Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base-neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene
1,1-dichloroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis(2-chloroethoxy)methane
Reporting. Test results shall be reported on DWR Form-A MR-PPA1 (or in a form approved by the Director)by
December 31st of each designated sampling year. The report shall be submitted to the following address: NC DEQ
/DWR/Central Files, 1617 Mail Service Center,Raleigh,North Carolina 27699-1617.
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Permit NC0020737
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that Municipal facilities
that are subject to the Effluent Pollutant Scan requirements listed above are also subject to additional toxicity
testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5). The US EPA requires four(4)toxicity
tests for a test organism other than the test species currently required in this permit. The multiple species tests
should be conducted either quarterly for a 12-month period prior to submittal of the permit renewal application,or
four tests performed at least annually in the four and one half year period prior to the application. These tests shall
be performed for acute or chronic toxicity,whichever is specified in this permit. The multiple species toxicity test
results shall be filed with the Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the additional
toxicity tests and reporting requirements. Results should also be summarized in Part E(Toxicity Testing Data)of
EPA Municipal Application Form 2A,when submitting the permit renewal application to the NPDES Permitting
Unit.
A. (6) MERCURY MINIMIZATION PLAN
[G.S. 143-215.1(b)]
The permittee shall continue implementing mercury minimization plan during this permit term. The MMP shall be
available for inspection on-site. The MMP should place emphasis on identification of mercury contributors and
goals for reduction. Results shall be summarized and submitted with the next permit renewal. Performance of the
Mercury Minimization Plan will meet the requirements of the TMDL(Total Maximum Daily Load)for mercury
approved by USEPA on October 12,2012,unless and until a Waste Load Allocation specific to this facility is
developed and this NPDES permit is amended to require further actions to address the Waste Load Allocation.
A. (7) ELECTRONIC REPORTING OF MONITORING REPORTS
[G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports(DMRs)and program reports.
The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D.(2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge
Monitoring Report(eDMR)internet application.
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Permit NC0020737
Monitoring results obtained during the previous month(s)shall be summarized for each month and submitted
electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit
DMRs electronically using the internet. Until such time that the state's eDMR application is compliant with
EPA's Cross-Media Electronic Reporting Regulation(CROMERR),permittees will be required to submit all
discharge monitoring data to the state electronically using eDMR and will be required to complete the eDMR
submission by printing, signing, and submitting one signed original and a copy of the computer printed eDMR
to the following address:
NC DEQ/Division of Water Resources/Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being
physically located in an area where less than 10 percent of the households have broadband access,then a
temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring
data may be submitted on paper DMR forms(MR 1, 1.1,2, 3)or alternative forms approved by the Director.
Duplicate signed copies shall be submitted to the mailing address above. See"How to Request a Waiver from
Electronic Reporting"section below.
Regardless of the submission method,the first DMR is due on the last day of the month following the issuance
of the permit or in the case of a new facility,on the last day of the month following the commencement of
discharge.
Starting on December 21,2020,the permittee must electronically report the following compliance monitoring
data and reports,when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act(CWA) Section 316(b)Annual Reports.
The permittee may seek an electronic reporting waiver from the Division(see"How to Request a Waiver from
Electronic Reporting"section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9),the permittee must identify the initial recipient at the time of each
electronic submission. The permittee should use the EPA's website resources to identify the initial recipient for
the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity(EPA or
the state authorized by EPA to implement the NPDES program)that is the designated entity for receiving
electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of
electronic submission and for each state. Instructions on how to access and use the appropriate electronic
reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at:
https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-pollutant-discharge-elimination-
system-npdes-electronic-reporting-rule.
Electronic submissions must start by the dates listed in the"Reporting Requirements"section above.
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Permit NC0020737
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic
reporting waiver,a permittee must first submit an electronic reporting waiver request to the Division. Requests
for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at
least sixty(60)days prior to the date the facility would be required under this permit to begin submitting
monitoring data and reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon
expire. At such time,monitoring data and reports shall be submitted electronically to the Division unless the
permittee re-applies for and is granted a new temporary electronic reporting waiver by the Division. Approved
electronic reporting waivers are not transferrable. Only permittees with an approved reporting waiver request
may submit monitoring data and reports on paper to the Division for the period that the approved reporting
waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B.
(11.)(a)or by a duly authorized representative of that person as described in Part II, Section B. (11.)(b). A
person,and not a position,must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions,the person signing and submitting the DMR must obtain an eDMR user account and
login credentials to access the eDMR system. For more information on North Carolina's eDMR system,
registering for eDMR and obtaining an eDMR user account,please visit the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE
ACCEPTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief true, accurate, and complete.I am aware that there are significant penalties for
submitting false information, including the possibility offines and imprisonment for knowing violations."
5. Records Retention [Supplements Section D. (6.)1
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of at least 3 years from the date of the report. This period
may be extended by request of the Director at any time [40 CFR 122.41].
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Permit NC0020737
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USGS Quad Name: Waco Lat.: 35°15'35" Location •
Receiving Stream: Buffalo Creek Long.: 81°27'26"
Stream Class: C ..
Subbasin:Broad—030805 HUC: 03050105 North City of Kings Mountain