NC0085359_Approval_20070719

WATF9
Michael F. Easley, Govemor
pG William G. Ross Jr., Secretary
r North Carolina Department of Environment and Natural Resources
-c Coleen H. Sullins, Director
Division of Water Quality
July 19, 2007
Christie Putnam, Public Works Director
Union County
400 N. Church Street
Monroe, NC 28111
Subject: Twelve Mi1 C-0085359)
Crooked Creek WWTP (NC0069841)
Residential Flow Reduction Approval
Union County
Dear Ms. Putnam:
On July 5, 2007, the Division of Water Quality received a flow reduction request for residences in
Union County served by the Twelve Mile WWTP (NC0085359) & the Crooked Creek WWTP
(NC0069841). The letter requests an allowable flow rate of 270 GPD per 3 bedroom residential
connection based on the evaluated data from the WWTP and the active number of residential
connections.
The DMR data provided between January 2006 and December 2006 with daily readings taken during
November 2006 (at Twelve Mile) and September 2006 (at Crooked Creek) was analyzed by central
office and regional office staff. Based upon this data the Division hereby approves the use of 95 GPD
per residential bedroom, with a minimum of 190 gpd for one and two bedroom units in all
applicable non -discharge permit applications. Flow shall be incremented by 95/gpd for each bedroom
above two. Regardless of the adjusted design daily wastewater flow rate, at no time shall the
wastewater flows exceed the effluent limits defined in the NPDES permit for the treatment facility or
exceed the capacity of the sewers downstream of any new sewer extension or service connection(s).
If you have any questions or comments regarding this matter, please contact Deborah Gore at
[phone] ext. 593 [email: [e-mail]].
Sincerely,
Coleen H. Sullins
cc: Rob Kerb, Mooresville Regional Office
Dee Browder, Mooresville Regional Office
NPDES Permit File No C$08535' NC0069841
PERCS Flow Reduction Ft e
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