NC0082139_Draft Permit_20200325

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
Randall Emory, PE
Greenville Utilities Commission
PO Box 1847
Greenville, NC 27835-1847
Dear Mr. Emory:
NORTH CAROLINA
Environmental Quality
March 25, 2020
Subject: Draft NPDES Permit NCO082139
Greenville WTP
Grade I Physical Chemical WPCS
Pitt County
The Division has reviewed your request to renew the subject permit. Please review this draft carefully to ensure a
thorough understanding of the information, conditions, and requirements it contains.
The draft permit includes the following significant changes from the existing permit:
➢ Iron has been removed from the Effluent table in Section A. (1) as there are no longer water quality
standards for Iron and the permit renewal application indicates that Iron sulfate or Ferrous sulfate does not
have the potential to be discharged.
➢ Former Footnote #3 in Section A. (1) has been removed as this is no longer required.
➢ Monitoring frequency for Turbidity has been updated to 2/Monthly in Section A. (1) per current water
treatment plant guidance.
➢ Permit Re -Opener special condition for WET testing has been removed per current water treatment plant
permitting strategy as the permittee has passed 75% or more of their toxicity tests over the past three
years.
➢ Section A. (2) has been updated regarding the submission of aquatic toxicity test results.
➢ Limits for Fluoride have been added to the Effluent table in Section A. (L) in conjunction with a
Compliance Schedule in Section A. (3) based on a reasonable potential to exceed water quality standards.
➢ Limits for Copper have been added to the Effluent table in Section A. (L) in conjunction with a
Compliance Schedule in Section A. (3) based on a reasonable potential to exceed water quality standards.
➢ Section A. (4) and Footnote #1 in Section A. (1) has been updated regarding electronic submission of
effluent data. Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs).
➢ The Supplement to Cover Sheet page has been updated to include the estimated maximum, monthly
average flow, stream index, an updated components list, and the HUC code.
➢ Quarterly monitoring for Hardness has been added to the Effluent table in Section A. (1) per current water
treatment plant guidance.
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.
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
NoarH caaouNa �
Department of environmental Quality/`� 919.707.9000

Page 2 of 2
Draft Permit NC0082139
Greenville WTP
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. See Section A. (1) Effluent Limitations and Monitoring Requirements.
The NPDES standard conditions (Parts II, III, and IV) that are a part of the permit are not included in this draft
document (cover, map, and Part 1). 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.
With this notification, the Division will solicit public comment on this draft permit by publishing a notice in
newspapers having circulation in the general Pitt County area, per EPA requirements. Please provide your
comments, if any, to me no later than 30 days after receiving 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 the draft, please contact me at
the telephone number listed at the bottom of this page, or via e-mail [[e-mail]].
Sincerely,
ji�_ 01*/
Sydney Carpenter
NPDES Compliance and Expedited Permitting
ec: NPDES File [Laserfiche]
Washington Regional Office [Laserfiche]
Operator Certification Program
Aquatic Toxicology Unit

NPDES Permit NCO082139
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NEDES)
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, the
Greenville Utilities Commission
is hereby authorized to discharge treated wastewater from a facility known as
Greenville Water Treatment Plant (WTP)
1721 Waterway Road
Greenville
Pitt County
to receiving waters designated as the Tar River, within the Tar -Pamlico River Basin, in accordance with
effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I, II, III,
and IV hereof.
The permit shall become effective
This permit and the authorization to discharge shall expire at midnight on October 31, 2024.
Signed this day
S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 9

NPDES Permit NCO082139
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as
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 described herein.
Greenville Utilities Commission
is hereby authorized to:
1. Continue to operate a conventional technology water treatment plant with discharge of wastewaters
from media filter backwash and sedimentation basins with a design potable flowrate of 22.5 MGD
and an estimated maximum, monthly average wastewater discharge of approximately 0.97 MGD.
This facility is located at 1721 Waterway Road, Greenville in Pitt County. Water and wastewater
treatment includes the following components:
• Pre -settling reservoir (63 MG)
• Rapid mixing tank
• Ozone contactor basin(s)
• Flocculation and sedimentation basins
• Multimedia filters
• Two (2) ground storage tanks (3 MG each)
• Pump stations with a diesel backup pump
• Superpulsator (10 MGD), upon completion of expansion
• Chemical usage consists of:
o Alum/Aluminum Sulfate
o Fluoride
o Ammonia Nitrogen/Chloramines
o Sodium Permanganate
o Powdered Activated Carbon
o Calcium Thiosulfate
o Copper Sulfate
o Sodium Hydroxide
o Acidic salts
o Ozone reagents: Malonic Acid/Potassium Acid Malonate
o Ortho Phosphate
o Polyacrylamide
o Sodium Hypochlorite
o Ammonium Hydroxide
Page 2 of 9

NPDES Permit NCO082139
SUPPLEMENT TO PERMIT COVER SHEET
CONTINUED
2. Upon completion of expansion of potable capacity up to 32 MGD, and 60 days prior to
commencement of expanded discharge from Outfall 001 from media filter backwash and
sedimentation basins, the Washington Regional Office staff and Central Office staff must be
contacted.
3. Discharge from said treatment works at a location specified on the attached map into the Tar
River, currently classified C; NSW waters [Stream Index: 28-(94)] in sub -basin 03-03-05 [HUC:
0302010304] of the Tar -Pamlico River Basin.
Page 3 of 9

NPDES Permit NCO082139
PART I
A. (L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 seq.]
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge filter backwash via Outfall 001. Such discharges shall be limited
and monitored' by the Permittee as specified below:
EFFLUENT CHARACTERISTIC
[eDMR Code]
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Recording
Sample
Location
Effluent
Flow (MGD) [50050]
Continuous
Total Suspended Solids [C0530]
30.0 mg/L
45.0 mg/L
Weekly
Grab
Effluent
pH (su) [00400]
Not < 6.0 or > 9.0
standard units
Weekly
Grab
Effluent
Total Residual Chlorine2 (fag/L) [50060]
17 pg/L
Weekly
Grab
Effluent
Turbidity (NTU) [00070]
Monitor & Report
2/Month
Grab
Effluent
Total Aluminum (tag/L) [01105]
Monitor & Report
Quarterly
Grab
Effluent
Total Coppers (fag/L) [01042]
7.88 tag/L
10.47 tag/L
Monthly
Grab
Effluent
Total Fluorides (pg/L) [00951]
1,800 pg/L
Monthly
Grab
Effluent
Ammonia Nitrogen (mg/L) [C0610]
Monitor & Report
Quarterly
Grab
Effluent
Total Phosphorous (TP)3 (mg/L) [C0665]
Monitor & Report
Quarterly
Grab
Effluent
Total Kjeldahl Nitrogen (TKN)3 (mg/L) [00625]
Monitor & Report
Quarterly
Grab
Effluent
NO3-N + NO2-N 3 (mg/L) [00630]
Monitor & Report
Quarterly
Grab
Effluent
Total Nitrogen (NO2+NO3+TKN)3 (mg/L) [C0600]
Monitor & Report
Quarterly
Grab
Effluent
Chronic WET Testing4 [TGP3B]
Monitor & Report
Quarterly
Grab
Effluent
Hardness — Total as
[CaCO3 or Ca + Mg)]6 (mg/L) [00900]
Monitor & Report
p
Quarter' y
Grab
Effluent
Hardness — Total as 7
[CaCO3 or (Ca + Mg)] (mg/L) [00900]
Monitor & Report
Quarterly
Grab
Upstream
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the Division's eDMR system
[see Section A. (4)].
2. The Division shall consider TRC effluent values reported below 50 µg/L to be compliant with the
permit. However, the Permittee shall continue to record and submit all values reported by a North
Carolina -certified laboratory method (including field certified), even if these values fall below 50µg/L.
3. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively. TP is Total
Phosphorus.
Page 4 of 9

NPDES Permit NCO082139
4. Chronic Whole Effluent Toxicity (WET) testing (Ceriodaphnia dubia) shall be performed as 7-day pass/fail
test at 90% effluent concentration, during January, April, July and October [See Section A. (2.)].
5. See Section A. (3) for a compliance schedule regarding Total Fluoride and Total Copper monitoring over the
next five years.
6. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent metals
(copper).
7. 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 the 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.
All samples collected should be from a representative discharge event.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.
A. (2.) CHRONIC TOXICITY PASS/FAIL MONITORING (QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The permittee shall conduct quarterly chronic toxicity tests using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised December 2010, or subsequent
versions).
The effluent concentration defined as treatment two in the procedure document is 90%. The testing
shall be performed as a Ceriodaphnia dubia 7-day pass/fail test. The tests will be performed during the
months of January, April, July, and October. 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 final
effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered electronically using
the Division's eDMR system for the month in which it was performed, using the parameter code
TGP3B. Additionally, DWR Form AT-1 (original) is to be sent to the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Or, results can be sent to the email, ATForms.ATB&ncdenr.gov.
Page 5 of 9

NPDES Permit NCO082139
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 and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. 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, then
monthly monitoring will begin immediately. Upon submission of a valid test, this monthly test
requirement will revert to quarterly in the months specified above.
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.
A. (3.) SCHEDULE OF COMPLIANCE (OUTFALL 001)
[NCGS 143-215.1(b)]
1. Within one year from the effective date of the permit the Permittee shall submit to the Division of
Water Resources a Corrective Action Plan summarizing the actions or strategy to be taken to achieve
compliance with the Total Fluoride and Total Copper limits at Outfall 001. Specific dates for
completion or implementation of each action shall be included.
2. Within two years from the effective date of the permit submit a report to the Division summarizing
actions taken in accordance with the Corrective Action Plan.
3. Within three years from the effective date of the permit submit a report to the Division summarizing
actions taken in accordance with the Corrective Action Plan.
4. Within four years from the effective date of the permit submit a report to the Division summarizing
actions taken in accordance with the Corrective Action Plan.
5. Achieve compliance with Total Fluoride and Total Copper limits specified in Section A. (1) within
five years of the permit effective date.
Upon approval of the Corrective Action Plan by the Division, the report and actions become an
enforceable part of this permit. Any modifications to the schedule shall be requested to the Division at
Page 6 of 9

NPDES Permit NCO082139
least ninety (90) days before the deadline. Modifications to the schedule in excess of four months will be
subject to public notice.
The Corrective Action Plan and reports shall include the owner's name, NPDES permit number and
Permittee contact person, and shall be submitted to:
(1) NCDEQ / Division of Water Resources (2) NCDEQ / Division of Water Resources
NPDES Compliance and Expedited Permitting Washington Regional Office
1617 Mail Service Center 943 Washington Square Mall
Raleigh, NC 27699-1617 Washington, NC 27889
A. (4.) ELECTRONIC REPORTING OF DISCHARGE 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.
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. The eDMR system may be
accessed at: https://deq.nc.gov/about/divisions/water-resources/edmr.
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
following address:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Page 7 of 9

NPDES Permit NCO082139
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.federalre_ig ster.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.
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.
Page 8 of 9

NPDES Permit NCO082139
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
http://deq.ne.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 Il,
Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (I 1.)(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.ne.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 of fines and imprisonment for knowing violations. "
5. Records Retention [Supplements Section D. (6.)]
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].
Page 9 of 9

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4l • i Waterway Rd \,
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[flows southeast]\<.
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Greenville Utilities Commission
Greenville Water Treatment Plant
1721 Waterway Road, Greenville NC 27835
Receivine Stream: Tar River Stream Class: C; NSW
Stream Seement: 28-(94) Sub -Basin: 03-03-05
Drainaee Basin: Tar -Pamlico HUC: 03020103
Latitude: 35' 38' 04" Loneitude: 77' 23' 55"
State Grid/USGS Ouad: E29NW / Greenville NW, NC
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Facility
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Location
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�IPDES Pennit NCO082139
Pitt County