NC0089656_Draft_20210104

ROY COOPER
Governor ri ` -
MICHAEL S. REGAN
4 a
S. DANIEL SMITH
Director NORTH CAROLINA
Environmental Quality
January 4, 2021
DC Charlotte Plaza LLLP
Attn:Nesic Dragan,Chief Engineer
1515 South Trion Street
Charlotte North Carolina 28203
Subject: DRAFT Review of NPDES Permit
NC0089656,WWTP Grade PC-1
Dimensional Place Permeant Dewatering
Mecklenburg County
To Mr. Dragan:
The Division of Water Resources (DWR or the Division)received your application to renew the
subject permit on December 27,2019 and hereby submits this renewal draft.Please study the
attached carefully to ensure your understanding of its limits and monitoring conditions, and to
correct errors,if any.
Changes from the Previous Permit: The Division understands that you have made significant
alterations to the original treatment system in that you have discontinued excavation dewatering
and now operate a permanent treatment system to dewater the building's subterranean parking.
For renewal the Division has conducted reasonable potential analyses(RPAs) of your previous
parameters of concern (POCs),as reported in eDMR databases. The Division thereby concludes
that a list of POCs do not show reasonable potential to exceed their respective surface water-
quality standards.
Monitoring therefore, is hereby discontinued for:
• Turbidity and Total Suspended Solids(TSS) [removed considering
halted excavation, system carbon filters,bag filters and the absence of
solids in the effluent for the past two years]
• the metals Total Copper,Total Zinc and Total Lead
• hardness monitoring(no longer required for metals analyses)
• chlorinated solvents 1,1 DCE, 1,2 DCA,TCE,PCE,and Chloroform
One solvent, 1,1 DCA however, does show reasonable potential and therefore monitoring
continues with permit limits [see section A. (1.)]. Likewise, annual sampling continues for EPA
methods 624 and 625 as spot checks for volatile and semi-volatile organic compounds. Lastly,we
have updated permit texts and the site-location map as required by current permitting guidance.
Whole Effluent Toxicity(WET)testing: Acute WET testing continues as pass/fail; Quarterly
(Pimephales promelas)24-hour static test at 90%effluent concentration,during January,April,
July and October [See permit sections A. (1.)and A. (4)].
North Carolina Department of Environmental Quality I Division of Water Resources
igAcT 512 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699-1617—
919.707.9000

Nesic Dragan,Chief Engineer
Draft Permit Review
Page 2 of 2
Monthly Report Submittals: Our records show that you have successfully registered for the
Electronic Discharge Monitoring Report(eDMR)program. If you have completed and submitted
to DWQ an Electronic Signature Agreement,you are no longer required to submit DMR
hardcopy as back-up to the eDMR.
NPDES standard conditions(Parts II,III,and IV), as attachments to this permit,are not included
in this draft document[cover,map,and Part I]. These standard conditions are identical to those
in your current permit except that agency and division names have been updated.This latest
version is available at https://bit.ly/2BZ4xxx and can be viewed and/or downloaded online as a
PDF file.
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 submit your written comments (if any),to the
undersigned,NCDEQ/DWR/NPDES permitting no later than January 25,2021 (within 30
days after receiving this document).We welcome your written comments,but they are not
mandatory.
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 fmal. If you have
questions,please email me at[ioe.corporonAncdenr.gov].
In support of mandated emergency response to Covid 19,much of NC state government including
NPDES Permitting currently function remotely,therefore correspondence via email is preferred.
Respectfully,
oe R. Co oron, .G.
DEQ/D /NPDES Permitting
Enclosure:NPDES Permit NC0089656(ren4wal draft)
ec: DWR/MRO,Cory Basinger
NPDES Program Files[Laserfiche]
DWR/OCU,Maureen Kinney
DWR/ATU,Cindy Moore

NPDES Permit NC0089656
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,
DC Charlotte Plaza LLLP
is hereby authorized to discharge wastewater from a facility located at the
Dimensional Place — Subterranean Parking Dewatering
1515 South Tryon Street, Charlotte
Mecklenburg County
to receiving waters designated as an unnamed tributary to Irwin 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 , 2021.
This permit and the authorization to discharge shall expire at midnight on June 30, 2025.
Signed this day , 2021.
S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 7

NPDES Permit NC0089656
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.
DC Charlotte Plaza LLLP
is hereby authorized to:
1. continue to operate a 0.108 MGD permanent dewatering system consisting of,but not limited to;
o a sub-slab dewatering drainage system [two (2) sumps]
o sump pumps
o four(4)each 1,000-pound activated carbon tanks
o a bag filter
o flow totalizer
o an effluent sample port
o appurtenant piping to the outfall
these facilities located at Dimensional Place, Subterranean Parking Dewatering, 1515 South Tryon
Street,Charlotte,Mecklenburg County; and
2. discharge from said treatment works via Outfall 001,at a location specified on the attached map,into
an unnamed tributary(UT)to Irwin Creek[Stream Segment 11-137-1], currently a Class C
waterbody within Subbasin 03-08-34 [HUC: 030501030101] of the Catawba River Basin.
Page 2 of 7

NPDES Permit NC0089656
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B.0400 et seq.,02B.0500 et seq.;WWTP Class PC-1 [15A NCAC 08G.0302]
During the period beginning with the effective date and lasting until expiration,the Permittee is
authorized to discharge from a permanently installed building dewatering system via 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 Locations
Flow(MGD) 50050 0.108 MGD Continuous Record E
pH(standard units) 00400 >6.0 and<9.0 s.u. Monthly Grab E
1,1 Dichloroethane(µg/L) 1,1 DCA 34496 100 µg/L 100 µg/L Monthly Grab E
Oil and Grease(mg/L) 00556 Monthly Grab E
[EPA Method 1664 SGT-HEM]
Acute Whole Effluent Toxicity 2 TGE6C Quarterly Grab E
Organics,Total Purgeables(VOCs) 76029 Annually Grab E
(EPA Method 624)(µg/L)3
Base Neutrals&Acids(Semi-VOCs) 76028 Annually Grab E
(EPA Method 625)(µg/L)3
Footnotes:
1. Beginning on the Effective Date,the Permittee shall submit Discharge Monitoring Reports electronically
using NC DWR's eDMR application system. See Condition A.(3.).
2. Whole Effluent Toxicity(WET): Acute,pass/fail; Quarterly(Pimephales promelas)24-hour static test at 90%
effluent concentration,during January,April,July and October[See Section A.(2.)].
3. For the eDMR reporting,any detections shall be entered"1"[Yes(Y)=1]and non-detection shall be reported
by entering"0" [NO(N)=0].Any detections by EPA 624 or EPA 625 shall be noted in the comments section
as"compound detected"to include its detected concentration.The Permittee shall keep laboratory reports on
file in accordance with records retention requirements,Part II.,Section D. 6.
4. All analytical practical quantitation limits(PQLs)shall be sufficiently sensitive to accommodate each
parameter's respective water quality standard[see Part II. Section D.(4.)].
Conditions:There shall be no discharge of floating solids or foam visible in other than trace amounts.
Page 3 of 7

NPDES Permit NC0089656
A. (2.) ACUTE TOXICITY - PASS/FAIL MONITORING (QUARTERLY)
[15A NCAC 02B .0200 et seq.]
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the North Carolina
Procedure Document entitled"Pass/Fail Methodology For Determining Acute Toxicity In A Single Effluent
Concentration"(Revised December 2010 or subsequent versions).The monitoring shall be performed as a
Fathead Minnow(Pimephales promelas)24-hour static test.The effluent concentration at which there maybe at
no time significant acute mortality is 90%(defined as treatment two in the procedure document).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.
Should any single quarterly monitoring indicate a failure to meet specified limits,then monthly monitoring
will begin immediately until such time that a single test is passed.Upon passing,this monthly test
requirement will revert to quarterly in the months specified above.
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 TGE6C.
Additionally,DWR Form AT-2(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,North Carolina 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 until such time that a single test is passed.Upon passing,this monthly test
requirement will revert to quarterly in the months specified above.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.
Should any test data from either these monitoring requirements 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 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

NPDES Permit NC0089656
A. (3.) 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)intemet 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.
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.
Page 5 of 7

NPDES Permit NC0089656
➢ NPDES Electronic Reporting Rule—Phase 2 Extension. EPA is proposing to
extend the Phase 2 deadline from December 21,2020 until at least December 21,
2023. The current compliance date will be extended if the implementation date is
extended as a final regulation change in the federal register.
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 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
Page 6 of 7

NPDES Permit NC0089656
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.
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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DC Charlotte Plaza LLLP- Dimensional Place N
NPDES Permit NC0089656
1515 South Tryon Street, Charlotte 28203 C i
Receiving Stream: UT to Irwin Creek Stream Class:C
Stream Segment: 11-137-1 Sub-Basin#:03-08-34 35.215278°N, -80.857778°W
River Basin:Catawba HUC:030501030101 SCALE NC Grid:G 15NE
County:Mecklenburg 1.10,000 USGS Quad:Charlotte E,NC