NC0086011_Correspondence_20080523

May 23, 2008
David K. Saunders
Utilities Director
P.O. Box 2511
Winston-Salem, NC 27102-2511
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
Subject: Monitoring for High Rock Reservoir (Permit - NCO086011)
Total Maximum Daily Load (TMDL) Study (chlorophyll a and turbidity)
Dear Mr. Saunders,
The Division of Water Quality (DWQ), in partnership with the Yadkin Pee -Dee River Basin
Association (YPDRBA), has begun monitoring of the High Rock Reservoir watershed for the
purpose of chlorophyll a and turbidity TMDL development, as of April 2008. The monitoring
is scheduled to last for two years (April 1, 2008 - March 31, 2010).
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 data to perform a comprehensive TMDL for High Rock Lake. Although your permit
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:
Parameter Description
Parameter
Measurement
Sample Type
Sample
Code
Fre uenc
MonthlyComposite
Location
TKN as N (m /L)
00625
NO2+NO3 (m /L)
00630
Monthly
Effluent
Composite
Effluent
Nitrogen, Total (as N)
(m /L)
00600
Monthly
Composite
Effluent
Phosphorus, Total
00665
Monthly
Composite
Effluent
Turbidi (ntu)
00076
2x/month
Grab
Effluent N to
q
North Carolina Division of Water Quality
Internet: www.ncwaterquality or=
1617 Mail Service Center Raleigh, NC 27699-1617
Location: 512 N. Salisbury St. Raleigh, NC 27604
Phone [phone]
Customer Service
Fax [phone]
1-877-623-6748
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper

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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,
c
7i�' aA��
Qi,�Coleen H. Sullins
cc: Winston-Salem Regional Office / Steve Tedder
Central Files
NPDES Files
TMDL and Modeling Unit, Planning Section
Jennie Atkins, Environmental Sciences Section
Thomas David Johnson