NC0084565_Draft Permit_20180711

_. ROY COOPER
yti Governor
,...,,
MICHAEL S. REGAN
Secretary
Water Resources LINDA CULPEPPER
ENVIRONMENTAL QUALITY Interim Director
July 11, 2018
Tony Konsul,Regional Manager
Carolina Water Service, Inc. of NC
PO Box 240908
Charlotte,North Carolina 28224-0908
Subject: Review of DRAFT NPDES Permit NC0084565
The Harbour WTP -Wells#1 and#2, Class PC-1
200 Bay Harbour Road,near Mooresville
Iredell County
Dear Mr. Konsul: '
The Division of Water Resources (DWR or the Division)has reviewed your request to renew the
subject NPDES Permit(application received October 2, 2017 via your authorized consultants,
LandDesign), and we hereby transmit this permit draft. Please review this draft carefully to ensure
your understanding of permit 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 Iredell County area, as
required by the NPDES program. Please email your written comments, if any, to
[[e-mail]], or write to my attention at DENR/DWR/NPDES no later than
August 15,2018,approximately 30 days after receiving this document. We welcome your
written comments,but they are not mandatory.
The Division has considered your Engineering Alternatives Analysis (EAA) submitted with your
application to renew. The EAA presents present-value costs and rationale for discharges to a
publicly owned treatment works (POTW), land-based disposal, surface irrigation, reuse, and
discharge to surface-waters of the State. DWR concurs that a discharge to surface waters is the
best viable disposal alternative based on cost.
Changes to Your Previous Permit--
1. Composite sampling is required of wastewater flows>30,000 gpd;please contact the
Mooresville Regional Office for approval of methods or devices. CWS must comply with
composite sampling on-or-before one (1) year from the permit effective date.
2. Based on DWR/CWS discussions during the pre-draft review (June 22, 2018), DWR may
reopen this permit to incorporate new data, as warranted [see Special Condition A. (3.)].
This Special Condition details compliance with new permit limits and deadlines:
a. compliance to metals limits begins on-or-before the expiration date of this permit.
b. compliance to Total Chloride limits begins on-or-before September 30,2021.
3. We have updated your facility description, Supplement to Permit Cover Sheet.

Tony Konsul,Regional Manager
Carolina Water Service,Inc.
Draft Permit Review
11Ju12018
Page 2
4. DWR discontinued monitoring for Total Iron [no standard]; no longer of concern.
5. We added new permit limits based on reasonable potential to exceed the standard for
Total Chloride, Total Lead; Total Copper(monitor Monthly), and Total Zinc(monitor
Monthly); Total Manganese(for water supply,monitor only, no limit), [see A. (1.)].
6. Lastly, we added Total Hardness monitoring required to calculate compliance for future
metals in dissolved fraction.
Division records show that you have successfully registered with the eDMR Program. Please be
reminded that until the state's eDMR application is approved compliant with EPA's Cross-
Media Electronic Reporting Regulation (CROMERR), all permittees must continue to submit
hardcopy of DMRs as backup to eDMR reporting [see details section A. (4.)].
Following the mandatory 45-day public comment period, the Division will review all pertinent
comments and take appropriate action prior to issuing an NPDES permit-renewal final. If you have
questions concerning this draft,please e-mail me [[e-mail]] or call my direct line
[phone].
Respe i y,
rNCDir
•e ' . Corpor. , L.G.
EQ/D ' PDES
Enclosure: NPDES Permit NC0084565 (DRAFT)
cc: NPDES Program Files
ec: MRO/SWPS:Ed Watson;Corey Basinger(Regional Supervisor)
ATB:Cindy Moore;Susan Meadows
OCU:Maureen Kinney
Steven Bond SBond@a,landdesign.com
MRO/DWS Clinton Cook[clinton.cookancdenr.gov

Permit NC0084565
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 Statut Ate , other lawful standards and
p
regulations promulgated and adopted by the North Carolina Envir ntal anagement Commission,and the
Federal Water Pollution Control
ria
Carolina Water Serv'ce (C �S), Inc. of NC
is hereby authorized to di charge waster from a facility located at the
The larbRuc TP - Wells #1 and #2
20043bour Road, near Mooresville
Iredell County
to receiving waters designated as an unnamed tributary to Lake Norman(Catawba River) in the
Catawba 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 , 2018.
This permit and authorization to discharge shall expire at midnight on March 31, 2023.
Signed this day , 2018.
Linda Culpepper, Interim Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 7

Permit NC0084565
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, Inc. of NC
is hereby authorized to:
1. continue to operate a wastewater treatment system applyin ✓chum-cycle cation-exchange (IE)
treatment technology to produce potable water averaging , 54,M01 \[design capacity 0.1634
MGD], generating softener backwash discharge at 0. d M D (max monthly average)
discharging 7-days per week, approximately twice dail o
0 minutes; utilizing
• three(3) each sodium ion-exchange ene s
• sodium metabisulfite addition \'
• holdingtank dischar in o o able-water distribution system)
( Y )
• two (2) each concrete- a lewa el-)settling basins [—2,000-gallon total capacity]
• sampling port and_pipid s a harge outfall
\\� .
using the chemicals
• Sodium Hypochlori \'disinfection) and
• Sodium Chloride(filter recharge)
these facilities located at the Harbour WTP, 200 Bay Harbour Road, Mooresville, Iredell County,
and
2. discharge from said treatment works via Outfall 001, at the location specified on the attached map,
into an unnamed tributary(UT) to Lake Norman (Catawba River), stream segment 11-(75), a
waterbody currently classified WS-IV; B; CA within subbasin 03-08-32 [HUC: 03050101] of the
Catawba River Basin.
Page 2 of 7

Permit NC0084565
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.];WTP Grade PC-1
During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is
authorized to discharge from Outfall 001. Such discharges shall be limited,monitored, and reported 1 by the
Permittee as specified below:
LIMITS ' MONITORING REQUIREMENTS
EFFLUENT CHARACTERISTICS
(Parameter Code) Monthly Daily Measurement Sample Sample
Average Maximum Frequency . Type Location 2
Flow 3(MGD) 50050 2/Month Instantaneous E
Total Residual Chlorine(TRC) 50060 17µg/L4 2 ffth\ Grab E
pH(standard units) 00400 Not<6.0 or>9.0 s.u.
ANN Grab E,D
Total Dissolved Solids 70295 250 mg/L / ‘Mon \ Composite 5 E,D
Total Suspended Solids 00530 30.0 mg/L 45.0 xttg( /Month Composite E,D
Dissolved Oxygen 00300 \\ )konthly Grab E,D
Turbidity 00070 Monthly Composite E
Conductivity 00094 Monthly Composite E
Ammonia[NH3 as N] C0610 Monthly Composite E
Total Hardness 00900 Monthly Composite E
(as Ca+Na or CaCO3)
Salinity /0048Q` \ Monthly ' Composite E
Total Chloride <00940 \230 mg/L6 Monthly Composite E
Total Copper \T\42 7.88 ug/L7 Monthly Composite E
Total Lead 01051 2.9 ug/L' Monthly Composite E
Total Zinc 01092 126.7 ug/L7 Monthly Composite E
Total Manganese 01055 Quarterly Composite E
Whole Effluent Toxicity 8 TGP3B Quarterly Composite E
Footnotes:
1. The Permittee shall submit monthly Discharge Monitoring Reports(DMRs)electronically using the Division's
eDMR application system[see Condition A. (4.)].Until the state's eDMR application is approved compliant with
EPA's Cross-Media Electronic Reporting Regulation(CROMERR),the Permittee shall submit DMR hardcopy as
backup to eDMR reporting.
2. E=Effluent;D=Downstream
3. The Permittee shall record flow discharge-event rates and flow durations in a log book,available for DWR
inspection.Effluent flow shall be measured concurrently with analytical sampling,as may be practicable.
4. TRC applies only if chlorine or chlorine derivatives are used to disinfect.The Division shall consider compliant all
effluent TRC values reported below 50µg/L.However,the Permittee shall continue to record and submit all values
reported by North-Carolina certified test methods(including field certified),even if these values fall below 50µg/L.
5. Composite sampling shall begin on-or-before 12 months from the permit effective date[see Permit Reopener A.(3.)];
6. Compliance to the Total Chlorides limit shall begin on-or-before September 30,2021 [see Permit Reopener A. (3.)];
7. Compliance to metals limits shall begin on-or-before the permit expiration date[see Permit Reopener A. (3.)];
8. Whole Effluent Toxicity(WET)Testing,Chronic,at 90%effluent concentration,7-day pass/fail using the species
Ceriodaphnia dubia,during the months of March,June,September,and December.
Conditions:All sampling shall accurately represent the chemical and/or physical character of the discharge.The
Permittee shall discharge no floating solids or foam visible in other than trace amounts.
Page 3 of 7

Permit NC0084565
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
March,June,September,and December.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 wil. ,e e t,
ed on the Effluent Discharge
Monitoring Form(MR-1)for the month in which it was performe., i,, the meter code TGP3B.
Additionally,DWR Form AT-1 (original)is to be sent to the f• ing address:ad
Attention: North Carolin Division • fer Resources
Water Science Section/Agatic Toxicology Branch
1621 Mail Servs� t
r
Raeigh,NC 27
621
Completed Aquatic Toxicity Test Form --s/i}k, bell d with the Water Sciences Section no later than 30 days
after the end of the reporting period for whiie deport is made.
Test data shall be complete aj acurateNarkdinclude all supporting chemical/physical measurements performed
in association with the toxicity to is as well as all dose/response data.Total residual chlorine of the effluent
toxicity sample must be measured\O 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.
Page 4 of 7

Permit NC0084565
A. (3.) PERMIT REOPENER — TO INCORPORATE NEW TREATMENT OPTIONS
[G.S. 143-215.3(a)(2)]
The Division may re-open this permit to incorporate proposed revisions to treatment technologies and
permit limits in accord with scheduled compliance deadlines for:
a) Composite sampling [method or device to be approved]
b) Dissolved metals
c) Total Chlorides
[in accord with section A. (1.), footnotes 5, 6 and 7]
A. (4.) ELECTRONIC REPORTING OF DISCHA r Ea` O 'STORING REPORTS
[G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all disch. �; hitoring reports (DMRs) and
program reports. The final NPDES Electronic Repb• 'ng Rule'was adopted and became effective on
December 21, 2015.
, \
NOTE: This special condition supple I s o�upersedes the following sections within Part II of this
permit(Standard Conditions for NPP r 'e)ii s):
• Section B. (11.) Si o e ir-ments
• Section D. (2.) I'tr�ep\� mg
• Section D. (6.) Reco3 Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)]
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
Page 5 of 7

Permit NC0084565
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 waivethe Divi ion(see"How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the pe a tee must identify the initial recipient at the time
of each electronic submission. The -b i�iittee shoed use the EPA's website resources to identify
the initial recipient for the electr c�\sub iso ion.
�— \ i4
Initial recipient of electro iPDES Insfbrmation from NPDES-regulated facilities means the
entity(EPA or the stat 4horized%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.
Page 6 of 7

Permit NC0084565
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)]
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 must obtain an eDMR user
account and login credentials to access the eDMR system. Fcoriii re information on North
Carolina's eDMR system,registering for eDMR and obt ifn fan e \MR user account, please visit
the following web page:
http://deq.nc.gov/about/divisions/water-resour-es/edmr
Certification. Any person submitting an electroR using the state's eDMR system shall
make the following certification [40CFR22.22]\\NO OTHER STATEMENTS OF
CERTIFICATION WILL BE ACS C T .\
"I certify, under penalty o ala u that thisdocument and all attachments were prepared under my
direction or supervisio i accor lance with a system designed to assure that qualified personnel
properly gather and eva I e\he information submitted. Based on my inquiry of the person or
persons who manage the sy em, 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 maybe 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
The Harbour WTP,Wells#1 &#2 Facility
State Grid/Quad: G15 NW/Lake Norman,N HUC: 03050101 Location
Drainage Basin: Catawba River Basin Stream Segment: 11(75) not to scale
Stream Class: WS-IV;B;CA Sub-Basin: 03-08-32
NPDES Permit NC0084565
Aeceivin tream: UT to Lake Norman(Catawba River) North
Iredell County