89923_Charlotte_Water_Cover_Letter_MOD_issuance_Feb2021

DocuSign Envelope ID: 395E7848-FA92-4667-8E06-031 DD1 FD67DD
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
William Deal, Senior Project Manager
Charlotte Water
c/o
5100 Brookshire Boulevard
Charlotte, North Carolina 28216
To Mr. Deal:
NORTH CAROLINA
EnKlratunentaf Quarity
3/10/2021
Subject: Permit Modification — Issuance of
Technical Correction Change Pages
NPDES NC0089923
Sewer Extension Dewatering Treatment
WWTP Class PC-1
Baxter and McDowell Streets, Charlotte
Mecklenburg County
On October 30, 2020, the Division of Water Resources (DWR) received your consultant's
request to increase permitted flow via Bruce D. Reilly, P.E., Senior Project Manager for Civil &
Environmental Consultants, Inc. We understand from Mr. Reilly that groundwater inflow to your
active excavations is considerably greater than anticipated, and that an increase in permitted flow
for treatment is warranted.
Permit modification for flow was submitted for Public Notice in November, but due to
unforeseen circumstances, we were forced to re -notice on January 17, 2021. Therefore, issuance
was not possible until after the mandatory Public Notice period of 30 days.
DWR has considered the potential impacts of this flow increase to the receiving -stream Class C
waters and can find no objection to your request considering that permit limits remain the same
under zero -flow receiving stream conditions. We have therefore adjusted the flow limit from
0.036 MGD to 0.108 MGD to reflect the treatment capacity of the existing system.
We also take this opportunity to make the following technical corrections:
1. treatment system Class is changed from PCNC to PC-1. Note that this requires a
Licensed Treatment System Operator;
2. several parameter codes were incorrect or excluded [see section A. (1.)].;
these include Trichloroethylene (TCE), Trichlorofluoromethane, 1,2,3
Trichloropropane, and Total Chromium;
3. eDMR reporting text [section A. (3.)] is now updated to reflect NPDES
Electronic Reporting Rule — Phase 2 Extension.
OE Q
North Carolina Department of Environmental Quality1 Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617-919.707.9000

DocuSign Envelope ID: 395E7848-FA92-4667-8E06-031 DD1 FD67DD
William Deal, Senior Project Manager
Charlotte Water
Issuance of Technical Correction Change Pages
Page 2 of 2
We have attached permit change -pages reflecting the above. Please insert these pages into your
existing permit and discard the old pages. If you have questions, please e-mail Joe Corporon at
[[e-mail]].
Sincerely,
-DocuSigned by:
e
'-8328B44CE9EB4A1...
John E. Hennessy, Supervisor
NPDES Compliance and Expedited and Permitting
Enclosure: NPDES Permit NC0089923 (technicalcorrection change pages)
ec: MRO, Ed Watson [edward.watson ncdenr.gov]
OCU, Maureen Kinney
Civil & EnvironmentalConsultants, Inc., Bruce Reilly [[e-mail]]