NC0031836_permit modification_20080523

May 23, 2008
Robert W. Hites, Jr.
City Manager
P.O. Box 1111
Statesville, NC 28687-1111
Michael F. Easley, Governor
North Carolina Department of EnviroWilliam G. Ross Jr., ry
nment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
Subject: Monitoring for High Rock Reservoir (Permit - NC0031836)
Total Maximum Daily Load (TMDL) Study (chlorophyll a and turbidity)
Dear Mr. Hites:
The Division of Water Quality (DWQ), (YPDRBA), has begun monitoring
to ring of the High Rock Reservoirartnership with the Pee -Dee River Basin
for the
purpose of chlorophyll a and turbidity TMDL development, as of April 2008 teThe momt rin
is scheduled to last for two years (April 1, 2008 - March 31, 2010). g
Ms. Kathy Stecker, Supervisor, Modeling and TMDL Unit, discussed additional effluent
monitoring needs for NPDES dischargers at the YPDRBA meeting held October 5, 2007.
These increased nutrient and turbidity monitoring needs are not currently included in your
facility's permit effluent monitoring requirements. Members of YPDRBA have agreed to
perform the additional monitoring for the duration of the two-year study, in order to supply
sufficient permit
t
data to perform a comprehensive TMDL for High Rock Lake. Although youry
is not being reopened to include this additional monitoring, should the voluntary monitoring
falter, the Division will reconsider this decision to include the additional monitoring for the
time necessary.
The additional effluent monitoring requirements for your facility are:
North Carolina Division of Water Quality 1617 Mail Service Center
Internet: www.ncwaterc ualit .ors Location: 512 N. Salisbury St. Raleigh, NC 2760Raleigh, NC 4 1617 Phone [phone]
Fax [phone] Customer Service
1-877-623-6748
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper
No7hCarolina
:Naturally

Additional Monitoring for High Rock Lake
Page 2
Thank you for your cooperation and assistance with this monitoring effort. This data will be
invaluable to model development and improve model predictions. If you have any questions,
please contact Ms. Susan A. Wilson, ext. 510 (Supervisor, Western NPDES Program) or Ms.
Kathy Stecker ; ext. 505.
Sincerely,
Coleen H. Sullins
cc: Mooresville Regional Office / Rob Krebs
Central Files
NPDES Files
TMDL and Modeling Unit, Planning Section
Jennie Atkins, Environmental Sciences Section