NC0043176_additional information requested_20190110

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
Mr. Steven Neuschafer, City Manager
PO Box 1065
Dunn, NC 28335
Dear Mr. Neuschafer:
NORTH CAROLINA
Environmental Quality
January 10, 2019
Subject: Additional Nutrient Monitoring
Requirements
Dunn WWTP
NPDES Permit No. NC0043176
Pursuant to N.C. General Statutes Section 143-215.1 and the implementing rules found in Title
15A of the North Carolina Administrative Code, Subchapter 02H, specifically, 15A NCAC
02H .0112(b)(1) and 02H .0114(a), the Director of DWR may reopen a permit to require
supplemental nutrient monitoring of the discharge. Per this letter, the Director is requiring
additional nutrient monitoring at the subject facility's effluent as specified below:
• Monitoring for total phosphorus (TP), total nitrogen (TN), total Kjeldahl nitrogen (TKN),
and Nitrite+Nitrate (NO2+NO3) shall be increased to weekly starting on April 1, 2019
and lasting through December 31, 2020. Nutrient monitoring shall revert to sampling
requirements as specified in the facility's NPDES permit starting January 1, 2021. The
additional monitoring results shall be submitted in the Discharge Monitoring Reports.
The additional monitoring will be used to support water quality modeling efforts within the
Cape Fear River Basin. Specifically, the additional monitoring will help ensure that nutrient
loadings from permitted facilities are represented as accurately as possible in the model, which
will include both point and non -point sources.
1:tEQ
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611

For more information on the modeling project, please visit
https://deq.nc.gov/about/divisions/water-resources/planning/modeling-assessment/special-
studies#MCF. If you have any questions, please contact Pamela Behm, DWR Modeling and
Assessment Branch Chief (pamela.behmPncdenr.gov, [phone]).
Sincerely,
Jeff Poupart
Water Quality Permitting Section Chief
Division of Water Resources
Cc: NPDES File
DWR / Fayetteville Regional Office / Water Quality
DWR / Modeling & Assessment / Pam Behm