NC0085111_Draft Permit_20181128

rR s,rArf k
ROY COOPER `4
CYr►'errt
MICHAEL S.REGAN '' `
Secretary 9 Y'
LINDA CULPEPPER NORTH CAROLINA
interim Director Environmental Quality
November 28, 2018
J. Beyce Mendenhall, V. P. of Operations
Carolina Water Service, Inc. of NC
PO Box 240908
Charlotte,North Carolina 28217
Subject: Review of DRAFT NPDES Permit NC0085111
Heather Glen Subdivision WTP, Class PC-1
5726 Craig Road, Durham 27712
Durham County
Dear Mr. Mendenhall:
Based on your request to renew the subject permit, the Division of Water Resources (DWR or
the Division)hereby transmits a renewal draft for your review and comment. Please review it
carefully to ensure your understanding of the limits and monitoring conditions, and to correct
errors, if any.
Concurrent with this notification, the Division will solicit public comment on this draft by
publishing a notice in newspapers having circulation in the general Durham County area, as
required by the NPDES Program. Please provide your written comments, if any, to DENR/
DWR/NPDES Program no later than December 28, 2018 (approximately 30 days after
receiving this document). Your written comments are welcome,but not mandatory.
Changes to the Previous Permit
This permit draft updates your facility description(see Supplement to Permit Cover Sheet), your
monitoring conditions, and your parameters of concern and their permit limits (see table A. (1.)].
We submit this draft having applied DWR's statewide permitting guidance(2009/2012) for
potable Water Treatment Plants (WTP)utilizing similar treatment technologies. Table A. (1.) is
sorted by"measurement frequency,"for your convenience. Please review this table carefully as
parameters of concern and monitoring characteristics have changed.
DWR understands that you do not currently discharge, nor have you discharged since year
2010. Division records show that you have successfully registered with the eDMR Program but
CV)
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—919.707.9000

J.Beyce Mendenhall,V.P. of Operations
Carolina Water Service,Inc.of NC
Draft Permit Review
28Nov2018
Page 2
are currently submitting monthly DMRs indicating"no flow."Please note that you may apply
to the Division for a DMR Reporting Waver if you do not expect to resume discharge soon.
Please contact Wren Thedford [[e-mail]] for reporting waver details.
Following the mandatory 45-day public comment period, the Division will review all pertinent
comments, if any, and take appropriate action prior to issuing an NPDES permit final. If you
have questions concerning this draft,please e-mail me [[e-mail]], or call my
direct line(919) 707-3617. .
Respect ly
>1k '
,,e R. Corp on,P.G
Compliant and Expedited Permitting Unit
Enclosure: NPDES Permit NC0085111 (Il T)
cc: NPDES Program Files
ec: RRO/SWPS:Vanessa Manuel;Danny Smith(Regional Supervisor)
ATB: Cindy Moore; Susan Meadows
OCU:Maureen Kinney
RRO/PWS Allen Hardy[[e-mail]]
Stephen Harwell[[e-mail]]
=DEQ

Permit NC0085111
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
' . PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
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,
Carolina Water Service (CWS), Inc. of North Carolina
is hereby authorized to discharge wastewater from a faaccilit' 'located at the
',!
CWS Heather Glen WTP, Heathe r<Ridg Subdivision
5726 Craig Road;I3s am
Durham County
\\\\to receivingwaters designated as an unnamed t' ut of S v nmi?Creek,Neuse,River Basin, in
accordance ith effluent limitations,monitoring requirements, and other conditions set forth in Parts I,
II, III and IV hereof.
This permit shall become effective
(---) 5 2019.
This permit and authonation to\discharge.shall expire a~t> idnight on January 31, 2023.
\\
Signed this day \\
, 2\018.
Linda Culpepper, Interim Director
Division of Water Resources
By Authority of the Environmental Management Commission
•
Page 1 of 7

Permit NC0085111
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.
Carolina Water Service (CWS), Inc. of North Carolina
is hereby authorized to:
1. continue to operate a filter-backwash treatment/system combining'ion- a 1E
g ( )
exchan treatment with
greensand filter technology to treat groundwater in support of potable-water production at a design
rate of 0.036 MGD, generating filter backwash a ergng'(historically-ono discharge since 2010]
0.003 MGD utilizing
• groundwater well (s) with 3 hp, _5gpm submersible pumps
• dual (2) greensand�fi j rs� ,
• booster pumps to backwash storage tank
• two (2) each ion-exchange(I1 i)water-so fteners with backwash treatment
•
• chlo i ation(soddium hypochlorite)
• brine wastewaters to\final�treatment
• effl�nt sample pont dischargeandine to outfall
• potable water to 3,000-gal t� Drage tank(to distribution system)
\\\
these facilities located at the CWS Heather Glen WTP (Heather Ridge Subdivision) 5726 Craig
Road, Durham, Durhan%unty, and
2. discharge from said treatment works via Outfall 001, at the location specified on the attached map,
into and unnamed tributary to Sevenmile Creek [Stream Segment 27-2-15], a waterbody currently
classified WS-IV; NSW within subbasin 03-04-01 [HUC: 03020201] of the Neuse River Basin.
Page 2 of 7

Permit NC0085111
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 15A NCAC 02B .0500 et seq.];
Grade I Physical Chemical 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 filter backwash and regenerate wastewaters from Outfall 001. Such
discharges shall be limited,monitored and reportedl by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS Monthly Daily Measurement Sample Sample
(PARAMETER CODE)
Average Maximum Frequency Type Location 2
Flow 50050 2/Month Instantaneous 2 E
Total Residual Chlorine 50060 28 µg/L 3 2/Month Grab E
pH[standard units] 00400 Not<6.0 or>9.0 s.u. 2/Month,/) Grab E,U,D
Total Suspended Solids(TSS) C0530 30.0 mg/L 45.0 mg/L 2/Mont/ (\ Composite E
� U
Dissolved Oxygen(mg/L) 00300 / j onthly \ Grab E,U,D
Total Dissolved Solids(mg/L) 70295 Monthly \C�mposite E
Ammonia Nitrogen(mg/L) C0610 \ \M�✓ /onv Composite E
(NH3 as N) r/\ \ >
Turbidity(NTU) 00070 \\\'' YVo ilily Grab E
Total Fluoride 00951 z.-- \ \\ NN onthly� Composite E
Salinity(ppth) 00480/7 N \ \ 'i/ Moiiily hComposite 4 E,U,D
Conductivity(µmhos/cm) , 00094\\\ // \\\ Monthly Composite 4 E,U,D
Total Chloridem 00 ) Monthly Composite E
Chloride(mg/L) �/ 094 \ \ ���
Total Copper(µg/L) \\ 01042 \\\\\\ v Monthly Composite E
Total Manganese(µg/L) \\0:\055 \ \> Monthly Composite E
Total Lead(µg/L) 01'0'1\ /I Monthly Composite E
Total Zinc(µg/L) 01092\! Monthly Composite E
Total Nitrogen 5 (mg/L) C0600 Monitor&Report Quarterly Composite E
Total Phosphorus(mg/L) C0665 Monitor&Report Quarterly Composite E
Total Hardness(mg/L) 00900 Monitor&Report Quarterly Composite E
Total Hardness(mg/L) 00900 Monitor&Report Quarterly Grab U
Chronic Toxicity 6 TGP3B Quarterly Composite E
[See Footnotes,page 4]
Page 3 of 7

Permit NC0085111
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using the
Division's Electronic Discharge Management(eDMR) system program [see A. (2.)].
2. E=Effluent;U=Upstream;D=Downstream. Permittee shall record flow in logbook(s),
available onsite for DWR inspection,the number,rate, and duration of backwash/discharge
events, and report the Daily Average of these events on the monthly DMR.
3. The Division shall consider compliant all effluent TRC values reported below 50 itg/L.
However,the Permittee shall continue to record and submit all values reported by a
North Carolina-certified test method(including field certified), even if these values fall
below 50 µg/L.
4. Note: receiving-stream samples shall be collected as"Grab."
5. For a given wastewater sample,TN= (NO2-N+NO3-N)+TKN,where TN is Total
Nitrogen, (NO2-N+NO3-N)is Nitrite/Nitrate Nitrogen, and TKN is Total Kjeldahl
Nitrogen.
6. Chronic Toxicity(Ceriodaphnia)P/F at 90%: March, June, September and December[see
A. (2.)]. ��
Condition: The Permittee shall discharge no floating solids or foam vis bi le in other than trace amounts.
</;;.>A. (2) CHRONIC TOXICITY PASS/FAIL MONITORING ONLY (QUARTERLY)
[15A NCAC 02B .0200 et seq.] \\,i
The permittee shall conduct quarterly chronic to' icity'tests using test procedures outlined in the"North
Carolina Ceriodaphnia Chronic Effluent Bioassay Psoceditre,"Revised December 2010, or subsequent
versions. e \\>N
//' `\\ �
The effluent concentration
defined as treatment two in the procedure�document is 90 %. The testing shall be
performed as a Ceriodaphnia dub/a\-day/p ss/fail test. The tests will be performed during the months of
March,June, September and December. Thesemonths signify the first month of each three-month toxicity
testing quarter assigned-to the facilit' Effluent samplingor this testing must be obtained during
representative effluent discharge'and shall`be performed/at the NPDES permitted final effluent discharge below
all treatment processe\\
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 TGP3B.
Additionally,DWR Form AT-�(original)is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh,NC 27699-1623
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.
Page 4 of 7

Permit NC0085111
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.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[NCGS 143-215.1 (b)] 4/ \��
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
program reports. The final NPDES Electronic Reporting Rule was adopted and b\�eccame effective on
December 21, 2015.
NN \\
NOTE: This special condition supplements or super%sedes the following sections within Part II of this
permit(Standard Conditions for - PDE 'Permits, ) \\
�
• Section B. (11.) Signatory Requirements
• Section D. (2). Reporting
• Section D. (6.),s Recd dQ Reten ion ,
\,)
• Section E{(5`) Monitoring Reports '''—/
' \ \\\\
1. Reporting Requirements �SU edes\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,(DMR) 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
Page 5 of 7

Permit NC0085111
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 maybe 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.
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
Page 6 of 7

Permit NC0085111
and is granted a new temporary electronic reporting waiver by the Division. Approved electronic
reporting waivers are not transferrable. Only peimittees 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); 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].
Page 7 of 7

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Carolina Water Service (CWS), Inc. of NC Facility
Heather Ridge Subdivision WIT'
Location
Receiving Stream: UT to Sevenmile Creek Stream Class: WS-IV;NSW (not to scale)
Latitude: 36°05' 14"N Subbasin: 03-04-01
Longitude: 78°58'34 W Stream Segment: 27-2-15 ] NPDES Permit NC0085111
Grid/Quad: C23SW/NW Durham HUC: 03020201 North
Durham County