NC0084565_permit modification_20210826

DocuSign Envelope ID: 602B2AAE-A965-4DB9-B4C6-75FDDABCA57C
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
S. DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
August 26, 2021
Mr. Brent Milliron
Carolina Water Service of NC, Inc.
4944 Parkway Plaza Blvd, Suite 375
Charlotte, NC 28217
Subject: NPDES Permit NC0084565
Minor Modification /Compliance Schedule
The Harbour — Wells 1 & 2 WTP
Iredell County
Dear Mr. Milliron:
The Division has approved your request to extend this permit's compliance schedule for
chloride, given your company's efforts to eliminate the discharge from the subject facility.
Therefore, the Division is issuing this minor modification to extend the compliance deadline for
four months, until March 1, 2022.
This permit modification is issued pursuant to the requirements of North Carolina General
Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S.
Environmental Protection Agency dated October 15, 2007 (or as subsequently amended). Insert
the attached pages into your permit and discard the old pages.
If any parts, measurement frequencies or sampling requirements contained in this
modification are unacceptable to you, you have the right to an adjudicatory hearing upon written
request within thirty (30) days following receipt of this letter. This request must be in the form of
a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina
27699-6714). Unless such demand is made, this decision shall be final and binding.
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 any other Federal, State, or
Local governmental regulation. If you have any questions concerning these changes, please
contact Charles H. Weaver [[e-mail]].
cc: NPDES Unit (Laserfiche)
NORTH
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Depeebnaat al EmlmameabN I mllh
Sincerely,
p-DocuSigned by:
8328B44CE9EB4A1...
S. Daniel Smith, Director
Division of Water Resources
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
919.707.9000

DocuSign Envelope ID: 602B2AAE-A965-4DB9-B4C6-75FDDABCA57C
Permit NC0084565
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
Frequency
Sample
Type
Sample
Location 2
Flow 3 (MGD)
50050
2/Month
Instantaneous
E
Total Residual Chlorine (TRC)
50060
17 µg/L4
2/Month
Grab
E
pH (standard units)
00400
Not < 6.0 or > 9.0 s. u.
2/Month
Grab
E, D
Total Suspended Solids
00530
30.0 mg/L
45.0 mg/L
2/Month
Grab
E, D
Total Dissolved Solids
70295
Month
Grab
E, D
Dissolved Oxygen
00300
Monthly
Grab
E, D
Turbidity
00070
Monthly
Grab
E
Conductivity
00094
Monthly
Grab
E
Ammonia [NH3 as N]
C0610
Monthly
Grab
E
Total Hardness
(as Ca + Na or CaCO3)
00900
Monthly
Grab
E
Salinity
00480
Monthly
Grab
E
Total Chloride
00940
230 mg/L5
230 mg/L5
Monthly
Grab
E
Total Copper
01042
7.88 µg/L6
10.7 µg/L6
Monthly
Grab
E
Total Lead
01051
2.94 µg/L6
75.5 µg/L6
Monthly
Grab
E
Total Zinc
01092
126.7 µg/L6
125.7 µg/L6
Monthly
Grab
E
Total Manganese
01055
Quarterly
Grab
E
Whole Effluent Toxicity 7
TGP3B
Quarterly
Grab
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 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.
5. Compliance to the Total Chlorides limit shall begin on March 1, 2022 [see Permit Reopener A. (3.)];
6. Compliance to metals limits shall begin on November 1, 2022. [see Permit Reopener A. (3.)];
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 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.
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DocuSign Envelope ID: 602B2AAE-A965-4DB9-B4C6-75FDDABCA57C
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 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-1 (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 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.
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DocuSign Envelope ID: 602B2AAE-A965-4DB9-B4C6-75FDDABCA57C
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 dissolved metals and Total Chlorides
in accord with section A. (1.), footnotes 5 and 6] as:
5. Compliance to the Total Chlorides limit shall begin on March 1, 2022.
6. Compliance to metals limits shall begin on November 1, 2022.
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.
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DocuSign Envelope ID: 602B2AAE-A965-4DB9-B4C6-75FDDABCA57C
Permit NC0084565
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:
• 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 s://www. federalregi ster. gov/documents/2015/10/22/2015 -24954/national-pollutant-di scharge-
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.
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DocuSign Envelope ID: 602B2AAE-A965-4DB9-B4C6-75FDDABCA57C
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. Si2natory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.)
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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