WQCS00009_Flow Reduction Approval_20211220

DocuSign Envelope ID:78F7DF41-2A47-4F6A-9360-6C97FC696589
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ROY COOPER ' ^:— .` '
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Governor ,,,bra o,-_ , .,
ELIZABETH S.BISER ''�, ^ o-� a_I"'
Secretory Secretory ''�h.
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
• December 20,2021
Mr. Michael Wilson,
Water& Sewer Authority of Cabarrus County
232 Davidson Hwy.
Concord,North Carolina 28027
Subject: Residential Unit Flow Reduction Approval
Water& Sewer Authority of Cabarrus County Collection System (WQCS00009)
Cabarrus County,North Carolina
Dear Mr. Wilson:
On April 23,2021, the Division of Water Resources (Division)received a request for an adjusted
daily sewage flow rate (flow reduction)that would apply to all permitted but not yet tributary
single-family residential unit connections and future connections tributary to the Water& Sewer
Authority of Cabarrus County(WSACC) collection system(Permit no. WQCS00009.)
Additional information was requested by the Division and was received on November 11,2021.
In accordance with 15A NCAC 02T.0114 (f) (1 &2),the Division has evaluated the request,
and based on the data submitted, the Division hereby approves for use by the WSACC an
adjusted daily sewage design flow rate with the following conditions:
• The flow reduction is'applicable to single-family residential dwellings only.
• The minimum flow for 1- and 2-bedroom dwellings shall be 160 gallons per day.
• Each additional bedroom above two bedrooms shall increase the volume by 80 gallons
per day per bedroom.
• This flow reduction shall not apply to sewer extension applications and/or permits for any
other public or private organizations whose wastewater flows are or might become
tributary to the WSACC collection system.
Future sewer extension applications should be made using the flow reduction amount stated
above. All other aspects of the permitting process remain unchanged, and all applications must
be in compliance with the statutes,rules, regulations and minimum design criteria as certified by
the owner and engineer.
Regardless of the adjusted design daily wastewater flow rate,at no time shall the wastewater
flows exceed the effluent limits defined in the permit for the treatment facility or exceed the
capacity of the sewers downstream of any new sewer extension or service connection(s).
D E 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
• NORTH CAROLINA
o4yanmm a F a om,m to IluatNtjedi 919.707.9000

DocuSign Envelope ID:78F7DF41-2A47-4F6A-9360-6C97FC696589
The granting of this flow reduction does not prohibit the Division from reopening, revoking,
reissuing and/or modifying the flow reduction as allowed by the laws,rules,and regulations
contained in 15A NCAC 02T,NCGS 143-215.1,or as needed to address changes in State and/or
Federal regulations with respect to wastewater collection systems,protection of surface waters,
and/or wastewater treatment.
The previously issued flow reduction approval letters for the Rocky River Regional Wastewater
Treatment Plant and the Muddy Creek Wastewater Treatment Plant dated December 6`h,2021
are hereby rescinded. The flow reduction allowance is being reissued to the applicable collection
system instead of the wastewater treatment plant.
If you have any questions,please contact Michael Montebello at(919)707-3624 or by email at
[e-mail].
Sincerely,
DocuSigned by:
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C464531431644FE
for S. Daniel Smith
Director,Division of Water Resources
by Michael Montebello
Municipal Permitting Unit, Division of Water Resources,DEQ
CC: Charles A.Willis,Jr.,PE,Willis Engineers ([e-mail])
Chad VonCannon,PE,Water& Sewer Authority of Cabarrus County
(C [e-mail])
Mooresville Regional Office,Water Quality Regional Operations
Municipal Permitting Unit(electronic copy)
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