WQ0014543_Residential Flow Reduction Approval_20230127

DocuSign Envelope ID:4A19B1A4-82B6-4D2A-9553-AA6BA837F0B9
ROY COOPER , , ,n
Governor I4 V,,'
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ELIZABETH S.B1SER2�*'��" � "
Secretory $"'
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
January 27, 2023
Mr.Aaron Holland, Assistant City Manager
City of Graham
201 South Main Street
P.O. Drawer 357
Graham,NC 27253
Subject: Residential Flow Reduction Approval
Graham Collection System(WQCS00065)
City of Graham
Alamance County
Dear Mr. Holland:
On January 10, 2023,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 residential connections and all future residential connections within the City of Graham
service area.
In accordance with 15A NCAC 02T .0114(f)(2), the Division has evaluated the request, and
based on the data submitted,the Division hereby approves for use by the City of Graham an
adjusted daily sewage design flow rate with the following conditions:
• The flow reduction is applicable to residential single-family and multi-family 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 City of Graham collection system (WQCS00065).
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.
North Carolina Department of Environmental Quality I Division of Water Resources
®��A, 512 North Salisbury Street 1161 l Mail Service Cenier I Raleigh,North Carolina 27699-1611
NO MI I CA'`"""," �/ 919.707.9000
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DocuSign Envelope ID:4A19B1A4-82B6-4D2A-9553-AA6BA837F0B9
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).
In accordance with 15A NCAC 02T .0114(f),the Division periodically requires reassessment of
wastewater flow data associated with the collection system or the receiving wastewater treatment
plant as applicable to confirm the suitability of the approved flow reduction value. The.City of
Graham shall submit documented,representative data in accordance with 15A NCAC 02T
.0114(f)(1)(A-H)prior to January 31,2031. Failure to submit the required data by this date will
result in this flow reduction approval letter becoming null and void. Upon review of the data, the
Division shall either reapprove,modify or not grant reapproval for the previously approved flow
reduction value.
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.
If you have any questions,please contact Charlie Miller,P.E. at(919) 707-3627 or by email at
[e-mail].
Sincerely,
CDocuSigned by:
. AithiAldato
C464531431644FE..
for Richard E. Rogers,Jr.
Director,Division ofWater Resources
by Michael Montebello
NPDES Branch Chief,Division of Water Resources,DEQ
CC: Troy King, Alley,Williams, Carmen, and King. inc. ([e-mail])
Winston-Salem Regional Office,Water Quality Regional Operations
Municipal Permitting Unit(electronic copy)
North rtm QualityService
ID Raleighn Northater Carolina 27699-1611
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