WQ0019907_Flow Reduction Letter_20071218

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality

Pretreatment, Emergency Response and Collection Systems Unit Internet http://h2o.enr.nc.state.us/ndpu
1617 Mail Service Center, Raleigh, NC 27699-1617 An Equal Opportunity Action Employer
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December 18, 2007

Mr. Francis A. Sanders, P. E., Director of Operations
Onslow Water & Sewer Authority
P.O. Box 1415
Jacksonville, North Carolina 28540

Subject: Town of Holly Ridge, WQ0019907
Residential Flow Reduction Approval
Onslow County

Dear Mr. Sanders:
On November 19, 2007, the Division of Water Quality received a flow reduction request for
residences in the Town of Holly Ridge served by the Holly Ridge WWTP (Permit No. WQ0019907).
The letter requests an allowable flow rate of 90 GPD per bedroom based on the evaluated data from
the WWTP, commercial water use and the active number of bedrooms per residential connection.
The DMR data provided between November 2006 and October 2007 with daily readings
taken during January 2006 was analyzed by central office staff. The November data was skewed by
significant rainfall and subsequently on December 17, 2007 data was submitted for November 2007.
Based upon this data the Division hereby approves your request for the reduction in flow to 90 gallons
per day per bedroom (minimum of 180 gpd for 1 and 2 bedroom residences) for sewer extension
permits issued within the Town of Holly Ridge and tributary to the Holly Ridge wastewater treatment
plant.
Regardless of the adjusted design daily wastewater flow rate, at no time shall the wastewater
flows exceed the effluent limits defined in the Non-Discharge 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: Ed Beck, Wilmington Regional Office
Dean Hunkele, Wilmington Regional Office
Land Applications Unit, Permit File WQ0019907
PERCS Flow Reduction File