WQCS00146_Residential Flow Reduction Approval_20220930

DocuSign Envelope ID:6833ACEC-6319-4C41-8360-9F4C16835B8F
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ROY. COOPER 1 ' "1` `
Governor
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ELIZABETH S:BISER
Secretary
RICHARD E.ROGERS,JR: NORTH CAROLINA
Director Environmental Quality
September 30,2022
Mr. Kent Jackson,P.E. Engineering Director
Town of Pittsboro
635 East Street,P.O.Box 759 •
Pittsboro,NC 27312
Subject: Residential Flow Reduction Approval
Pittsboro Collection System(WQCS00146)
Town of Pittsboro
Chatham County
Dear Mr. Jackson:
On August 25,2021,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 residential connections and all future residential connections within the Town of
Pittsboro service area: Additional information was requested by the Division and was received
on March 23,2022 and September 23, 2022.
In accordance with 15A NCAC 02T .0114(f)(2),the Division has evaluated the request, and
based on the data submitted,the Division herebyapproves for use by the Town of Pittsboro an
adjusted daily sewage design flow rate with the following-conditions:
• The flow reduction is applicable to residential multi-family dwellings only.
• The minimum flow for 1- and 2-bedroom dwellings shall be 1-44 gallons per day. ,
• Each additional bedroom above two bedrooms shall increase the volume by 72 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 Town of Pittsboro collection system(WQCS00146). '
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.
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DocuSign Envelope ID:6833ACEC-6319-4C41-8360-9F4C16835BBF
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 Town of
Pittsboro shall submit documented,representative data in accordance with 15A NCAC 02T
.0114(f)(1)(A-H)prior to March 31,2029. 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
Charlie.Miller( ncdenr.gov.
Sincerely,
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for Richard E. Rogers,Jr.
Director,Division of Water Resources
by Michael Montebello
NPDES Branch Chief,Division of Water Resources,DEQ
CC: Mitch Craig, P.E., CE Group, Inc. (mitch cr,cearouninc.com)
Morgan DeWitt,P.E., Town of Pittsboro ([e-mail])
Raleigh Regional Office, Water Quality Regional Operations
Municipal Permitting Unit(electronic copy)
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