Loading...
HomeMy WebLinkAboutNC0021491_Permit Modification_20080523A7'F9 Michael F. Easley, Governor : y May 23, 2008 Christine W Sanders Town Manager 171 S Clement St Mocksville, NC 27028 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 - NCO021491) Total Maximum Daily Load (TMDL) Study (chlorophyll a and turbidity) Dear Ms. Sanders, 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 DescriptionpPar-ameter Measurement Sample Type Sample TKN as N (m /L) e 5 Fre uen Weekl Com Location ( /L) 0 Weekl osite Com osite EffiuentNO2+NO3 EffiuentNitrogen, Total (as N)0Composite Effiuent( /L)Turbidi (ntu) 6 Weekly Grab Effluent Nam` Caro ina ��fJ North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone (919) 733-7015 Customer Service Internet: www ncwaterouality org Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax (919) 733-2496 1-877-623-6748 An Equal Opportunity/Affirmative Acton Employer— 50% Recycled/10% Post Consumer Paper 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, OJC4 oleen H. Sullins cc: Winston-Salem Regional Office / Steve Tedder Central Files NPDES Files TMDL and Modeling Unit, Planning Section Jennie Atkins, Environmental Sciences Section Nicholas Dmitri Slogick