NC0086606_Draft Permit_20180919

ROB' COOPER
Covernor
MICHAEL S. RECAN
LINDA CULPEPPER
Interim Director
NORTH CAROLINA
Environmental Quality
September 19, 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 NCO086606
CWS The Harbour Well #4 WTP, Class PC-1
1540 Bradley School Road, 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
October 19, 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 the Permit Draft and Previous Permit —
1. Based on discussions (DWR/CWS) during the pre -draft review (June 22, 2018), DWR may
reopen this permit to incorporate new data, as warranted [see Special Condition A. (3)].
Condition A. (3.) details schedules for permit limits and compliance deadlines as:
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.
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

Tony Konsul, Regional Manager
Carolina Water Service, Inc.
Draft Permit Review
19Sep2018
Page 2 of 2
2. Based on reasonable potential to exceed respective water -quality standards, this renewal
adds new permit limits for Total Chloride, Total Lead; Total Copper, and Total Zinc [see
section A. (1.)].
3. DWR discontinued monitoring for Total Iron [no standard]; no longer of concern.
4. Lastly, we have updated your facility description, Supplement to Permit Cover Sheet. We
added Total Hardness monitoring required to calculate future compliance for 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].
Enclosure: NPDES Permit NC0086606 (Draft perunL)
hc: NPDES Program Files
Central Files
ec: DWR/MRO, Corey Basinger, SWPS Supervisor
OCU, Maureen Kinney
Steve Bond [[e-mail]]
MRO/PWS, Clinton Cook

Permit NCO086606
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 i(p-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Envi�fonme \ Management Commission, and the
Federal Water Pollution ContrZLt, as amended,
Carolina Water Servic
is hereby authorized
, Inc\of NC
facility located at the
— Well #4
11 County
Mooresville
to receiving waters designated as an�idnniamed tributary to bake 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 NCO086606
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 applyi� g S ium Ion Exchange (IE)
technology to produce potable water (0.364 MGD) from&ftrit uent�well(s), generating softener
backwash discharge (maximum, monthly average,0 1.4 MGD utilising
• groundwater well(s)
• chlorination
• five (5) each sodium ion
11
• two (2) each hydro tanks
• two (2) each settling��t&d
• sodium metabisulfate\
• sodium
these facilities located\he Ha46,o;r\ �TP,1540 Bradley School 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] in the
Catawba River Basin.
Page 2 of 7

Permit NCO086606
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et 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 from Outfall 001. Such discharges shall be limited, monitored, and reported 1 by the
Permittee as specified below:
EFFLUENT CHARACTERISTICS
(Parameter Code)
LIMITS
MONITORING REQUIREMENTS
Monthly
[Average
Daily
Maximum
Measurement
Fre uency
Sample
Type
Sample
Location
Flow 2 (MGD)
50050
Monthly
Instantaneous
Effluent
Total Dissolved Solids (mg/L)
70295
/2/,Monthly
Grab
Effluent
Total Suspended Solids
00530
30.0 mg/L
45.0 m Ll
/2/Mpnthly
Grab
Effluent
Total Residual Chlorine
50060
17 µW,>
2/Monthly
Grab
Effluent
H standard units
00400
Not < 6.0 or >,,9.0,s": u.
2/Monthly
Grab '
Effluent
Turbidity 4 (NTU)
00070
\�
�Monthly�\
Grab
Effluent
Conductivity (µhoms/cm)
00094
��,
Monthly
Grab
Effluent
Ammonia [N113 as N] (mg/L)
C0610
��
��� ��
Monthly
Grab
Effluent
Total Hardness (mg/L)
CaCO3 or Ca + Na)
00900
~
�\Monthly
\/
Grab
Effluent
Salinity (mg/L)
00��0
Monthly
Grab
Effluent
Dissolved Oxygen (mg/L) --
00300\
Monthly
Grab
Effluent
Total Manganese / /
-0'1055\
Monthly
Grab
Effluent
Total Chloride �'
00940\
'23�O�mg/L5
230 mg/L 5
Monthly
Grab
Effluent
Total Copper
01042J718
µg/L 6
10.47 µg/1,6
Monthly
Grab
Effluent
Total Lead
01051
�2.94 µg/L
75.5 µg/L 6
Monthly
Grab
Effluent
Total Zinc
\'01092✓
/127 µg/L6
125.7 µg/L6
Monthly
Grab
Effluent
Whole Effluent Toxicity
T03B'
Quarterly
Grab
Effluent
Footnotes:
1. Beginning on the effective date of this permit, the Permittee shall submit monthly Discharge Monitoring Reports
(DMRs) electronically using the Division's eDMR application system [see Condition A. (3)]. Until the state's eDMR
application is approved compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR), DMR
hardcopy must be submitted as backup to eDMR reporting.
2. Effluent Flow shall be measured concurrently with samples for analysis, as may be practicable. Discharge event flow
rate and flow duration shall be recorded in a log book, available for DWR inspection.
3. TRC limit and monitoring apply only if chlorine or chlorine derivatives are used to disinfect. The Division shall
consider compliant all effluent TRC values reported below 50 µg/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 50 µg/L.
4. Turbidity shall not fall below 25 ntu [lake discharge]. If natural instream turbidity exceeds 25 ntu, this effluent shall
not cause to increase natural turbidity conditions. Downstream sampling may be required to verify compliance.
5. Compliance to the Total Chlorides limit shall begin on -or -before September 30, 2021 [see Permit Reopener A. (3.)];
6. Compliance to this permit limit shall begin on or before the expiration date of this permit.
7. 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 samples 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 NCO086606
A. (2.) CHRONIC TOXICITY PASS/FAIL - MONITORING (QUARTERLY)
[15A NCAC 02B .0200 et seq.]
The permittee shall conductg_uarterlX 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 will'be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed�singKthe parameter code TGP3B.
Additionally, DWR Form AT-1 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Reso�rces
Water Sciences Sectbn/Aqu�ic Toxicolov Branch
1621 Mail Service C6n�ter
` Raleigh, N� \ 27,\699-1 62
Completed Aquatic Toxicity Test Forms shall Be filed` #h-the WaterSaiences Section no later than 30 days
after the end of the reporting period&�41iich '&report is,mau
Test data shall be complete
in association with the to�f,
toxicity sample must be me
Should there be no discharge of flo
the permittee will complete the infc
the facility name, permit number, p
"No Flow" in the comment area of
address cited above.
clu`ic e-all sr pporting chemical/physical measurements performed
all die/%e�` onse data. Total residual chlorine of the effluent
\if chlorine is employed for disinfection of the waste stream.
e facility during a month in which toxicity monitoring is required,
ocated at the top of the aquatic toxicity (AT) test form indicating
-r, county, and the month/year of the report with the notation of
The report shall be submitted to the Water Sciences Section at the
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 NCO086606
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 dissolved metals and Total Chlorides
in accord with section A. (1.), footnotes 5 and 61 as:
5. Compliance to the Total Chlorides limit shall begin on -or -before October 31, 2021.
6. Compliance to metals limits shall begin on -or -before the permit expiration date.
A. (4.) ELECTRONIC REPORTING OF DISCHARGlf\M\ONITORING REPORTS
[G.S. 143-215.1(b)]
Federal regulations require electronic submittal of
program reports. The final NPDES Electronic Rep
December 21, 2015. e�
NOTE: This special conditions,
permit (Standard Conditions for
• Section B. (11
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
1. Reporting Requirements [Sx rsedes Section
>rts (DMRs) and
became effective on
sections within Part II of this
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
Page 5 of 7

Permit NC0086606
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 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) Ai
The permittee may seek an electronic
Waiver from Electronic Reporting" sE
2. Electronic Submissions
In accordance with 40 CFR 1
of each electronic submissior
the initial recini
Initial recipient of elect
entity (EPA or the state
designated entity for re(
"How to Request a
;e must identify the initial recipient at the time
use the EPA's website resources to identify
irmation from NPDES-regulated facilities means the
)� to implement the NPDES program) that is the
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 Reuortin�
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
Page 6 of 7

Permit NC0086606
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://deg.nc.gov/about/divisions/Water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.)
All eDMRs submitted to the permit issuing authority shall
II, Section B. (11.)(a) or by a duly authorized representati)
Section B. (I 1.)(b). A person, and not a position, must -be
reporting purposes. Z/,
For eDMR submissions, the person signing and
account and login credentials to access the; Dl\/.
Carolina's eDMR system, registering for eD\Nff
the following web page: �.-�''� \�
i by a person described in Part
person as described in Part II,
i signatory authority for eDMR
je DMR must obtain an eDMR user
or more information on North
an eDMR user account, please visit
Certification. Any p6rsorr sul:mittin&` elect onia,DMR using the state's eDMR system shall
make the followi4certification'[40�CFR 122.221. NO OTHER STATEMENTS OF
CERTIFICATION *±L BE ACC\EPT\ED:
"I certify, under penalty of \w, tat his 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 offines 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 7 of 7

Carolina Water Service (CWS), Inc. of NC
The Harbour Well #4 WTP
State Grid/Quad:
El5SW / Lake Norman, N HUC: 03050101
Draina¢e Basin:
Catawba River Basin Stream Seement: 11(75)
Stream Class:
WS-IV; B; CA Sub -Basin: 03-08-32
Receivine Stream:
UT to Lake Norman (Catawba River)
J
Outfa11001
Lat: 350 33', 14"
Long: -80,0 55', 35"
(Flows W)
Chuckwood RoadsNJ
1 1 i )•.
ti 1 i
r A �
�•
Facility
Location
not to scale
North INPDES Permit NC0086606
Iredell County