NC0086924_Permit (Correction)_20191010

DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
STAT.
+C54
NORTH CARCLINA
Envba Mentc!Quahty
10/10/2019
Mr. David L. Clegg
Tyrrell County
108 S Water Street
Columbia, NC 27925-0449
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
Subject: Change -Page to Correct Error
NPDES Permit NCO086924
Tyrrell County
Reverse Osmosis WTP
Grade PCNC WPCS
Tyrrell County
Dear Mr. Clegg:
The Division of Water Resources (the Division) has became aware of an error in your issued permit
(effective October 27, 2017). Review of permitting guidance for water treatment plants indicates
that a compliance schedule should be implemented for any new limits imposed on required
parameter monitoring, and the facility grade should be cited.
Accordingly, we hereby forward the modified permit pages to amend your permit adding the
facility grade and a compliance schedule to meet copper limits. Please insert these change pages
into your existing permit and discard the old pages. We regret any inconvenience this causes your
organization.
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 permits that may be required.
If you have questions, or if we can be of further service, please contact Brianna Young at
[e-mail] or call [phone].
Respectfully,
DocuSigned by:
8328B44CE9EB4A1...
Linda Culpepper, Director
Division of Water Resources, NCDEQ
D_EQ�
North Carolina Department of Environmental Quality I Division of Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919-707-9000

DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
Enclosure: NPDES Permit NC0086924 (Corrected Pages)
cc: Central Files
NPDES Program Files
Washington Regional Office
WSS/Aquatic Toxicology Branch

DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
Permit NCO086924
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
N( PDES)
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 Water Quality Commission, and the
Federal Water Pollution Control Act, as amended,
Tyrrell County
is hereby authorized to discharge wastewater from a facility located at the
Tyrrell County Reverse Osmosis WTP
3868 Albemarle Church Road
Columbia
Tyrrell County
to receiving waters designated as Bull Bay within the Pasquotank River Basin in accordance with the
discharge limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV
hereof.
This permit shall become effective November 1, 2019.
This permit and the authorization to discharge shall expire at midnight on October 31, 2022.
Signed this day 10/10/2019
DocuSigned by:
8328B44CHEB4M ...
Linda Culpepper
Director, Division of Water Resources
By the Authority of the Environmental Management Commission
Page 1 of 8

DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
Permit NCO086924
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit 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.
Tyrrell County Reverse Osmosis Water Treatment Plant
is hereby authorized to:
Continue to operate a Water Treatment Plant with a discharge of reject water from reverse
osmosis units. This water treatment plant currently has a design potable flowrate of 0.936 MGD
and a maximum, monthly average wastewater discharge of 0.06416 MGD. This facility is
located at 3868 Albemarle Church Road in Columbia in Tyrrell County. Water and wastewater
treatment consists of.
• RO Unit
• Subaqueous diffuser
2. Discharge reject wastewater from an effluent diffuser system via Outfall 001 at the location
specified on the attached map into Bull Bay [Stream Segment: 30-14], which is currently
classified as SB waters within subbasin 03-01-53 [HUC: 0301020502] in the Pasquotank River
Basin.
Page 2 of 8

DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
Permit NCO086924
PART I.
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade PCNC WPCS [15A NCAC 08G .0302]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from outfall 001- Reverse Osmosis Reject Water. Such discharges
shall be limited and monitored' by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
Parameter code
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Location
Flow (MGD) 50050
Continuous
Recording
E
Dissolved Oxygen 00300
Monthly
Grab
E, U, D
Salinity 00480
Monthly
Grab
E, U, D
Conductivity 00094
Monthly
Grab
E, U, D
pH 00400
6.8 s.u. <_ pH
:5 8.5 s.u.
2/Month
Grab
E, U, D
Total Residual Chlorine 3 50060
13
Hg/I
2/Month
Grab
E
Total Dissolved Solids 70295
Monthly
Grab
E
Turbidity 00070
Monthly
Grab
E
Total Copper 4 01042
3.70 pg/l
5.80 pg/l
Monthly
Grab
E
Total Chloride 00940
Monthly
Grab
E
Total Nickel 01067
Quarterly
Grab
E
Total Fluoride 00951
Monthly
Grab
E
Total Zinc 01092
Monthly
Grab
E
Ammonia Nitrogen C0610
Monthly
Grab
E
Total Nitrogen (TN) C0600
Quarterly
Grab
E
Total Phosphorus (TP) C0665
Quarterly
Grab
E
Whole Effluent Toxicity 5 TGE3E
Monitor & Report
Quarterly
Grab
E
Footnotes-
1. The permittee shall submit discharge monitoring reports electronically using the Division's eDMR
system [see Section A. (6)].
2. Sample Locations: E — Effluent, U — Upstream at Location B, D — Downstream at Location M6. See
Section A. (4) for locations and frequencies.
3. Limit and monitoring requirements apply only if the facility adds chlorine or chlorine derivatives to water
that is eventually discharged. 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 (including field certified), even if these values
fall below 50 µg/l.
4. See Section A. (5) for copper compliance schedule.
5. Acute Toxicity Monitoring (Mysid shrimp) 24hr P/F @ 90%; Quarterly: January, April, July, and
October. See Section A. (2).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 3 of 8

DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
Permit NCO086924
A. (2) ACUTE TOXICITY PASS/FAIL MONITORING ONLY (QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The permittee shall conduct acute toxicity tests on a qyy terly basis using protocols defined in the North
Carolina Procedure Document entitled "Pass/Fail Methodology For Determining Acute Toxicity In A
Single Effluent Concentration" (Revised -December 2010 or subsequent versions). The monitoring shall
be performed as a Mysid Shrimp (Mysidopsis Bahia) 24 hour static test. The effluent concentration at
which there may be at no time significant acute mortality is 90% (defined as treatment two in the
procedure document). 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 on the Effluent
Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter code
TGE3E. Additionally, DWR Form AT-2 (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 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 either these monitoring requirements 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 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 4 of 8

DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
Permit NCO086924
A. (3) DISCHARGE SPECIAL CONDITION
[G. S. 143-215.1(b)]
The effluent diffuser must be designed to prevent surface turbulence and bottom scour. Should the
location of the discharge cause visible turbulence within Bull Bay, the Division may require that the
discharge be relocated.
The diffuser must be submerged during low tide conditions.
A. (4) INSTREAM MONITORING REQUIREMENTS
[G.S. 143-215.66]
The following parameters shall be monitored within Bull Bay (at the locations indicated) 2/month year-
round.
Parameter Location
Frequency Months
Salinity (ppt)
B, M6
2/month
January through
Temperature (C)
December (year)
D. O. m /l
B — Background sample should be taken at or near the mouth of Bunton Creek, in the estuary, outside
the influence of the discharge.
M6 — Along a northwest/southeast transect from the discharge point, approximately 50 feet northwest of
the discharge.
NOTE: Map on the following page is not to scale.
A. (5) SCHEDULE OF COMPLIANCE (OUTFALL 001)
[G. S. 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 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.
5. Achieve compliance with Total Copper limits specified in Section A. (1) by October 31, 2022.
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
least ninety (90) days before the deadline. Modifications to the schedule in excess of four months will be
subject to public notice.
Page 5 of 8

DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
Permit NCO086924
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 Wilmington Regional Office
1617 Mail Service Center 127 Cardinal Drive Ext.
Raleigh, NC 27699-1617 Wilmington, NC 28405
A. (6) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[NCGS 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. 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
Page 6 of 8

DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
Permit NC0086924
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: http://www2.epa.gov/compliance/final-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.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
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DocuSign Envelope ID: FAD387DB-6C10-4A83-9213-6CB048B8F4A7
Permit NC0086924
http: //deq.ne. aov/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. (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:
h!Ltp:Hdeq.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 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 8 of 8

DocuSign Envelope ID: FAD 387DB-6C10-4A83-9213-6CB048B8F4A7
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