NC0082210_Draft Permit_20211123

ROY COOPER k ? . �'
Governor re'; •it',
ELIZABETH S.BISER +. E
Secretory S.DANIEL SMITH NORTH CAROLINA
Dire(for Environmental Quality
November 23, 2021
Todd Taylor
Orange Water and Sewer Authority
400 Jones Ferry Road
Carrboro,NC 27510
Subject: Draft NPDES Permit NC0082210
Jones Ferry Road WTP
Grade I Physical Chemical WPCS
Orange County
Dear Mr. Taylor:
Attached 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. We
understand from your renewal application that there have been no significant changes to the treatment
system.There are a few changes in the draft from the existing permit. These changes are summarized
below.
• Regulatory Citations-Language has been added where necessary in the permit to provide regulatory
citations for permit requirements and facility classification.
• Electronic Reporting-Permit language has been modified to be consistent with the fmalization of
federal requirements for electronic reporting.
• Discharge Description—Language has been updated in the Supplement to Permit Cover page to
provide more information on the treatment system.
• 1,4 Dioxane Monitoring—In accordance with DWR NPDES Strategy for addressing 1,4 Dioxane in
the Cape Fear River Basin monitoring requirements have been added to your permit. This
requirement is for monitoring and reporting in order to gather information.
• Monitoring with WET Testing-The previous permit had required monitoring certain parameters at
the same time as the required toxicity testing. This requirement is no longer in place and the
footnotes related to this requirement have been removed.
• Nutrient Monitoring Special Condition—Permit language has been updated for this reopener
condition in Section A. (2)of the permit.
• Electronic Submittal of WET Testing Results—Language has been updated in this section of the
permit to note the ability to submit forms electronically.
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Todd Taylor
Jones Ferry Road WTP
Page 2
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 I).The conditions are the same as in your current permit.The latest
version of the standard conditions is available at https://bit.ly/3k5NFaL and can be viewed online or
downloaded as a PDF file.
Concurrent with this notification the Division is publishing a notice in a newspaper having general
circulation in the Orange County area soliciting public comments on this draft permit. Please provide
any written comments you may have to me 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(919)707-3629 or contact me by email at [e-mail]. At this time,
contact by email is the most effective method. If we need to set up a call to discuss any issues we can set
that up through email.
Sincerely,
rt4
Bradley Bennett
Compliance and Expedited Permitting Unit
cc: NPDES Files-electronic
Raleigh Regional Office/Water Quality—electronic
Operator Certification Program/Maureen Kinney—electronic

Draft Permit NC0082210
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, the
Orange Water and Sewer Authority
is hereby authorized to discharge wastewater from a facility located at the
Jones Ferry Road Water Treatment Plant
400 Jones Ferry Road
Carrboro
Orange County
to receiving waters designated as an unnamed tributary to Morgan Creek in the Cape Fear River Basin
in accordance with effluent limitations, monitoring requirements, and other applicable conditions set
forth in Parts I, II, III and IV hereof.
This permit shall become effective
This permit and authorization to discharge shall expire at midnight on July 31, 2026.
If the permittee intends to continue discharging at the facility beyond the term of this permit,a renewal
application must be submitted no later than February 1,2026(180 days before the expiration of this permit)
Signed this day
S. Daniel Smith
Director, Division of Water Resources
By Authority of the Environmental Management Commission
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Draft Permit NC0082210
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.
The Orange Water and Sewer Authority
is hereby authorized to:
1. Continue to operate a Water Treatment Plant with a discharge of filter backwash from a
conventional water treatment facility. This water treatment plant currently has a design potable
flowrate of 20 MGD and a monthly average discharge of 0.62 MGD (when discharging). Water
and wastewater treatment consists of:
• 2 Backwash equalization tanks
• 3 Backwash clarifiers
• Solids handling(equalization tank, gravity thickener,belt press)
• Polymer feed systems(tanks and pumps)
• Dechlorination using calcium thiosulfate
The facility is located at 400 Jones Ferry Road, at the Jones Ferry Road Water Treatment Plant,in
Carrboro, in Orange County.
2. Discharge from said treatment works at the location specified on the attached map into an unnamed
tributary to Morgan Creek [16-41-2-(5)], currently classified WS-V,NSW waters located within
Subbasin 03-06-06 (HUC 030300020607)in the Cape Fear River Basin.
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Draft Permit NC0082210
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
Grade I Physical Chemical Water Pollution Control System [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. Such discharges shall be limited and monitored)
by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Monthly Daily Measurement Sample
Parameter Code Average Maximum Frequency Sample Type Location
Flow 50050 Monitor and Report(MGD) Each event Instantaneous Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/Month Grab Effluent
pH 00400 >_6.0 s.u.and<—9.0 s.u. 2/Month Grab Effluent
Total Residual Chlorine 2 50060 17 pg/L 2/Month Grab Effluent
Turbidity 00070 Monitor and Report(NTU) 2/Month Grab Effluent
1,4 Dioxane3 82338 Monitor and Report(mg/L) Monthly Grab Effluent
Aluminum 01105 Monitor and Report(mg/L) Quarterly Grab Effluent
Total Iron 01045 Monitor and Report(pg/L) Quarterly Grab Effluent
Total Copper 01042 Monitor and Report(pg/L) Quarterly Grab Effluent
Hardness—Total as 45 Monitor and Report(mg/L) Quarterly Grab Effluent
[CaCO3 or(Ca+Mg)] 00900
Hardness—Total as 45 Monitor and Report(mg/L) Quarterly Grab Upstream
[CaCO3 or(Ca+Mg)] . 00900
Manganese 01055 Monitor and Report(pg/L) Quarterly Grab Effluent
Fluoride 6 00951 Monitor and Report(pg/L) Quarterly Grab Effluent
Total Zinc' 01092 Monitor and Report(mg/L) Quarterly Grab Effluent
Total Phosphorous(TP) C0665 Monitor and Report(mg/L) Quarterly Grab Effluent
Total Nitrogen(TN) C0600 Monitor and Report(mg/L) Quarterly Grab Effluent
Ammonia Nitrogen 8 C0610 Monitor and Report(mg/L) Quarterly Grab Effluent
Whole Effluent Toxicity Monitoring 9 TGA3B Pass/Fail Quarterly Grab Effluent
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the Division's eDMR system. See
Condition A.(4.).
2. 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.
3. 1,4 Dioxane Monitoring: After a minimum of 12 samples have been collected over a 12 month period the permittee
may request that the Division reevaluate monitoring frequencies for 1,4 dioxane. Must utilize EPA Method 624.1.
4. Instream monitoring for hardness is not provisionally waived if the Permittee is a member of a Monitoring Coalition.
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Draft Permit NC0082210
5. Effluent hardness monitoring should be performed in conjunction with monitoring for hardness dependent metals
(copper,zinc).
6. Fluoride should be monitored if the Permittee backwashes with fluoridated finished water.
7. Zinc should be monitored if the Permittee adds zinc orthophosphate as a corrosion inhibitor prior to backwashing.
8. Ammonia nitrogen should be monitored if the permittee uses choramines(adds ammonia to chlorinated water)for
secondary disinfection prior to backwashing.
9. Ceriodaphnia dubia 48 hour static test @ 90%concentration. See Condition A.(2.)for toxicity testing requirements.
Toxicity testing should be performed quarterly during the months of March,June,September and December, during
times when a representative discharge occurs.
All samples must be collected from a typical discharge event.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2.) ACUTE TOXICITY MONITORING ONLY(QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The permittee shall conduct acute toxicity tests on a quarterly 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 Ceriodaphnia dubia 48 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). Effluent samples for self-monitoring purposes must be obtained during representative
effluent discharge below all waste treatment. The tests will be performed during the months of
March,June, September and December. These months signify the first month of each three month
toxicity testing quarter assigned to the facility.
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 TGA3B. 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,North Carolina 27699-1621
Or,results can be sent to the email [e-mail].
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.
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Draft Permit NC0082210
nof w fr m h f facility duringa month in which toxicitymonitoringis
Should there be o flo o t e ac
Y
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.
Should it be determined by the North Carolina Division of Water Resources that the facility's
discharge frequency and duration enable chronic sampling according to either the North Carolina
Ceriodaphnia Chronic Whole Effluent Toxicity Procedure or to Section 8.3, in Methods EPA-821-R-
02-013, the permit may be re-opened and modified to include chronic toxicity tests.
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.
A. (3.) PERMIT RE-OPENER: SUPPLEMENTARY NUTRIENT MONITORING
[G.S. 143-215.1(b)]
(a) Pursuant to N.C. General Statues Section 143-215.1 and implementing rules found in Title 15A of
North Carolina Administrative Code, Subchapter 02H, specifically, 15A NCAC 02H.0112(b)(1)
and 02H.0114(a), and Part II, Sections B.12 and B.13. of this Permit, the Director of DWR may
reopen this permit to require supplemental nutrient monitoring of the discharge. The additional
monitoring will be to support water quality modeling efforts within the Cape Fear River Basin, and
shall be consistent with a monitoring plan developed jointly by the Division and affected
stakeholders. In addition, the results of water quality modelling may require that limits for total
nitrogen and total phosphorous be imposed on this permit upon renewal.
(b) The Division may, upon written notification to the permittee, re-open this permit in order to
incorporate or modify effluent limits, monitoring and reporting requirements, and other permit
conditions when it deems such action is necessary to implement TMDL(s) approved by the
USEPA.
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Draft Permit NC0082210
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
See "How to Request a Waiver from Electronic Reporting" section below.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
reported via the eDMR system no later than the last calendar day of the month following the
completed reporting period. 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 21,2025 the permittee must electronically report the following compliance
monitoring data and reports,when applicable:
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Draft Permit NC0082210
• 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(l)(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.
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
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Draft Permit NC0082210
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 of fines 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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Draft Permit NC0082210
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Facility
Jones Ferry Road WTP
Receiving Stream: UT to Morgan Creek Stream Class: WS-V;NSW Location
River Basin: Cape Fear Sub-Basin: 03-06-06 (not to Scalel
Latitude: 35°54'30" Longitude: 79°04'48" —
Stream Segment 16-41-2-(5) HUC#: 030300020607 N NPDES Permit NC0082210
Grid/Quad: D22NE/Chapel Hill Coin : Orange
Page 9 of 9