NC0089729_Draft Permit_20180516

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
Water Resources LINDA CULPEPPER
Environmental Quality Interim Director
May 16,2018
Mr.Douglas Pierotti,P.G.
City of Charlotte
600 East Fourth St.
Charlotte,NC 28202
Subject: Draft NPDES Permit NC0089729
Myrtle/Morehead Storm Drainage Improvement
Mecklenburg County
Dear Mr. Pierotti:
In response to your request to apply for the subject NPDES permit,the Division of Water Resources
(DWR or the Division)hereby transmits this draft for your review and comment.Please review this
document to assure your understanding of the permit limits and monitoring conditions,and to correct
errors,if any.
Additional information for the engineering alternatives analysis(EAA)was received on April 4,2018,
April 27,2018 and May 2,2018. Charlotte Water indicated that the Publicly Owned Treatment Works
(POTW)does not accept groundwater discharges per the City of Charlotte's Sewer Use Ordinance.The
Division concurs that alternatives such as land application of wastewater,infiltration galleries,ex-situ
treatment&injection, and a sewer connection are cost prohibitive and/or technologically infeasible as
compared to a NPDES discharge.
Concurrent with this notification,the Division will solicit public comment on this draft by publishing a
notice in newspapers having circulation in the general Mecklenburg County area,as required by the
NPDES Program.Please provide your comments,if any,to me via email [[e-mail]] or
write to my attention care of DEQ/DWR/NPDES Program no later than June 15,2017. Your written
comments are welcome but not mandatory.
Following the mandatory 30-day public comment period,the Division will review all pertinent comments
on your permit draft,and take appropriate action prior to issuing your NPDES permit final. If you have
questions concerning this draft,please e-mail me or call my direct line(919) 807-6307.
Sincerely,
�x/tip.
Derek Denard,Environmental Specialist
Division of Water Resources,NCDEQ
State of North Carolina I Environmental Quality
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919-707-9000

Mr.Pierotti
May 16,2018
Page 2 of 2
Enclosure:NPDES Permit NC0089729(DRAFT)
hc: NPDES Program Files
ec: MRO/Corey Basinger[[e-mail]],Edward Watson[[e-mail]]
Andrew Pitner[[e-mail]];Wes Bell[[e-mail]]
Aquatic Toxicology Branch/Susan Meadows[[e-mail]]
Wastewater Operator Certification Group/Maureen Kinney[[e-mail]]
Richard Farmer[[e-mail]]
Douglas Pierotti,[[e-mail]]
Al Quarles[[e-mail]]

NPDES Permit NC0089729
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,
City of Charlotte
is hereby authorized to discharge wastewater from a facility located at the
Myrtle/Morehead Storm Drainage Improvement
Charlotte, NC 28203
Mecklenburg County
to receiving waters designated as an unnamed tributary to Little Sugar Creek in the Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts
I, II, III,and IV hereof.
The permit shall become effective , 2018.
This permit and the authorization to discharge shall expire at midnight on , 2023.
Signed this day , 2018.
Linda Culpepper, Interim Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 8

NPDES Permit NC0089729
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked, and as of this 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 described herein.
City of Charlotte
is hereby authorized to:
1. begin operating a 0.050 MGD dewatering and groundwater remediation system consisting of, but not
limited to;
• groundwater trenching project
• a weir/equalization tank(as needed)
• a holding/ settling tank
• two (2) bag filters in parallel for sediment to remove sediment
• an air stripper with four(4)trays,a rate 50 gpm, air max @350 cfrn; Carbonair STAT 80 or
equivalent
• two (2)bags filters in parallel following the air stripper
• transfer pumps and appurtenances
• discharge outfalls to stormwater drains
located at a proposed storm drainage improvement construction area between South Bld., South
Caldwell St., Templeton Ave., Euclid Ave., Rensselear Ave., and Cleveland Ave., in Charlotte,
Mecklenburg County; and
2. discharge from said treatment works via Outfalls 001 and 002 at a location specified on the attached
map, into an unnamed tributary to Little Sugar Creek [Stream Segment 11-137-8], currently a Class
C waterbody within Subbasin 03-08-34 [HUC: 030501030102] of the Catawba River Basin.
Page 2 of 8

NPDES Permit NC0089729
Facility Classification:Not Classified
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge from Outfalls 001 and 002. Such discharges shall be limited and monitored ' by the
Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS 1
[Parameter Code] Monthly Daily Measurement Sample Sample 2
Average Maximum Frequency Type Locations
Flow(MGD) 50050 0.050 MGD Continuous Recording E
Total Suspended Solids(TSS) C0530 30.0 mg/L 45.0 mg/L Monthly Grab E
Turbidity(NTU)3 00070 50 NTU 50 NTU Monthly Grab E
Turbidity(NTU)3'4 00070 Monitor&Report Monthly Grab U,D 4
>6.0and<9.0
pH(su) 00400 Monthly Grab E
standard units
cis-1,2-Dichloroethylene(µg/L) 77093 720 tg/L 720 tg/L Monthly Grab E
Tetrachloroethylene(µg/L) 34475 3.3 µg/L 3.3 µg/L Monthly Grab E
trans-1,2-Dichloroethylene(mg/L) 34546 32 mg/L 3.2 mg/L Monthly Grab E
Trichloroethylene(ttg/L)(ttg/L) 39180 3 tg/L 3 µg/L Monthly Grab E
Vinyl chloride(µg/L) 39175 2,4ttg/L 2.4µg/L Monthly Grab E
Xylenes(µg/L) 81551 670 ttg/L 670 tg/L Monthly Grab E
1,1-Dichloroethylene(ttg/L) 34501 20 mg/L 20 mg/L Monthly Grab E
Chloroform(mg/L) 32106 2 mg/L 2 mg/L Monthly Grab E
2-Butanone(mg/L) 78356 26 mg/L 26 mg/L Monthly Grab E
1,1-Dichloroethane(µg/L) 34496 100}tg/L 100µg/L Monthly Grab E
1,2,4-Trimethylbenzene(tg/L) 77222 390 tg/L 390 ttg/L Monthly Grab E
tert-Butylbenzene(µg/L) 77353 Monitor&Report Monthly Grab E
Oil and Grease(mg/L) 00556 Monitor&Report Monthly Grab E
[EPA Method 1664 SOT-HEM]
Total Copper(.tg/L)5 01042 Monitor&Report Monthly Grab E
Hardness-Total as
[CaCO3 or(Ca+Mg)] (mg/1)5 00900 Monitor&Report Monthly Grab E
Hardness-Total as 4
4 6 00900 Monitor&Report Monthly Grab U
[CaCO3 or(Ca+Mg)] (mg/1) '
TGP3B
Chronic WET testing 7 THP3B Monitor&Report Quarterly Grab E
Organics,Total Purgeables(VOCs)
76029 Monitor&Report Annually Grab E
(EPA Method 624)(tg/L)8
Base Neutrals&Acids(Semi-VOCs)
76028 Monitor&Report Annually Grab E
(EPA Method 625)(.tg/L)8
Footnotes: See next page.
Page 3 of 8

NPDES Permit NC0089729
Footnotes:
1. The Permittee shall begin submitting Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Condition A. (3.).
2. E=Effluent; U=upstream; D=Downstream
3. Turbidity: Effluent turbidity shall not cause receiving-stream turbidity to exceed 50 NTU.If background
turbidity naturally exceeds 50 NTU,the effluent shall not cause background turbidity to increase.Any
discharge exceeding this permit limit will require sufficient instream sampling(upstream and/or downstream)
to verify compliance(effluent vs.background). [NCAC 02B. 0211(21)]
4. If no stream flow is available to sample,indicate"no stream flow"on DMR.
5. Effluent hardness sampling should be performed in conjunction with sampling for hardness dependent metals
(Copper).
6. The Permittee shall sample instream hardness,upstream of the facility's discharge.The sample shall be
representative of the hardness in the receiving stream.
7. Chronic Whole Effluent Toxicity(WET)testing(Ceriodaphnia dubia) 7-day chronic pass/fail test,permit
limit,at 90%in March,June, September and December. See condition A. (3.).
8. For the eDMR application system,any detections shall be reported by entering"1" [Yes(Y)=1] and no
detection shall be reported by entering"0" [NO(N)=03.Any detections for Total Purgeables Organics(EPA
Method 624)or Base Neutrals&Acids(EPA Method 625) shall be noted in the comments section by noting
the compound detected and reported concentration.Laboratory reports shall be kept on file in accordance with
records retention requirements found in Part II. Section D. 6.
iat
Conditions:
• There shall be no discharge of floating solids or visible foam t r than trace amounts.
• Discharge shall show no evidence as a source for oily film or she `% the receiving stream.
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Page 4 of 8

NPDES Permit NC0089729
A (2). CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 90%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or
subsequent versions or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised- December 2010) or subsequent versions. The tests will be performed during the months of
January,April,July and October. 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.
If the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple-concentration testing shall be performed at a minimum, in
each of the two following months as described in"North Carolina Phase II Chronic Whole
Effluent Toxicity Test Procedure" (Revised-December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Frm (MR-1) for the months in which tests were performed, using the parameter
code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-
3 (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, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. 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, monitoring
will be required during the following month. Assessment of toxicity compliance is based on the toxicity
testing quarter, which is the three month time interval that begins on the first day of the month in which
toxicity testing is required by this permit and continues until the final day of the third month.
Page 5 of 8

NPDES Permit NC0089729
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 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 supe 2. .,the following sections within Part II of this permit
(Standard Conditions for NPDES Permits): 4.= ,
0,4
• Section B. (11.) Signatory Requirements
• Section D. (2) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports '4344
1. Reporting Requirements 1Supersedes 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. 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 ystem due to a demonstrated hardship or due to the facility being
physically located in an area where less t 10 percent of the households have broadband access,then a
temporary waiver from the NPDES electr nic reporting requirements may be granted and discharge
monitoring data may be submitted on pap r 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.
Page 6 of 8

NPDES Permit NC0089729
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 ide wg° the initial recipient at the time of each
w
electronic submission. The permittee should use the EPA's i t t ources to identify the initial recipient
for the electronic submission.
Initial recipient of electronic NPDES information from WDES-regulated facilities means the entity(EPA or
the state authorized by EPA to implement the NPDE4'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. o �srop ° ;;Jectronic reportingtool for each type of
.. ,
electronic submission and for each star structions on : ,, r� P��.� s and use theappropriate electronic
reporting tool will be available as wel x, n �•..tion on EPA : :"°_i ES Electronic Reporting Rule is found at:
http://www2.epa.gov/compliance/final �'�'�t ��. utant-disch �. -limination-system-npdes-electronic-
reporting-rule. � "
Electronic submissions must start by the dates listed m th6 +sting 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 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
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.
Page 7 of 8

NPDES Permit NC0089729
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-r4sources/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 Dire,; , at any time [40 CFR 122.41].
Page 8 of 8

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Stream Segment: 11-137-8 Stream Class: C Outfall 001: 35.214094°N, -80.852786°W
River Basin: Catawba Sub-Basin#: 03-08-04 SCALE Outfall 002: 35.215219°N, -80.851039°W
County: Mecklenburg HUC: 030501030102 1:10,000 NC Grid:G15NE/USGS Quad:Charlotte E,NC