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Home My WebLink AboutNC0067318_Speculative Effluent Limits_20160125Michael F. Easley Governor William G. Ross, Jr, Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P E., Director Division of Water Quality January 25, 2006 Mr. Terry Bell Chief Operations Officer Macon County Schools P.O. Box 1029 Franklin, North Carolina 28744 Subject: Speculative Effluent Limits NCO067326 - Cullasaja Elementary School NCO067318 - Nantahala Elementary School Macon County Dear Mr. Bell: This letter is in response to the request for an increase in permitted wasteflow for the two schools listed above. Before the Division can proceed, some additional information needs to be provided by Macon County Schools. First, completed NPDES applications for each school requesting the expansion flow from 2000 GPD to 3000 GPD should be sent to this office and should include major modification fees at $215.00 per school. In addition, an Engineering Alternatives Analysis (EAA) needs to be submitted that will evaluate any alternatives to the expansion process. A consultation with Mr. Bob Deweese of the Department of Public Instruction should provide insight into the information that must be provided in the EAA. The Cullasaja Elementary School discharges to the Cullasaja River in the Little Tennessee River Basin and has a stream classification of B -Trout. The Nantahala Elementary School discharges to Partridge Creek, in the Little Tennnessee River Basin and has a stream classification of C Trout. Neither of these streams is listed on the North Carolina 303(d) Impaired Waters List for 2004. Based on available information, the tentative effluent limits for oxygen - consuming constituents of the Cullasaja Elementary School and the Nantahala Elementary School discharges, both at the flow of 0.003 MGD are included on the attached effluent sheets. The Division of Water Quality is requiring chlorine limits for all new or expanding dischargers proposing the use of chlorine for disinfection. The process of chlorination/dechlorination or an alternate form of disinfection, such as ultraviolet radiation, should allow the facility to comply with this requirement. N. C. Division of Water Quality / NPDES Unit Phone (919) 733-5083 1617 Mad Service Center, Raleigh, NC 27699-1617 fax: (919) 733-0719 Internet: h2o enr state.nc us DENR Customer Service Center. 1 800 623-7748 Final NPDES effluent limitations will be determined when a permit application is submitted to the Division. If there are any additional questions concerning this matter, please feel free to contact Jackie Nowell of my staff at (919) 733-5083 ext. 512. Respectfully, Susan A. Wilson, Supervisor NPDES Western Program cc: Asheville Regional Office/Surface Water Protection Dr. Rodney Shotwell/Macon County Schools Bob Deweese/ Department of Public Instruction NPDES Permit Files/NC0067326; NC0067318 CULLASAJA ELEMENTARY SCHOOL — NC0067326 SPECULATIVE EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period beginning upon reratmg to 0 003 MGD and lasting until expiration, the Permittee is authorized to discharge from outfall 001 Such discharges shall be limited and monitored by the Pen-nittee as specified below: EFFLUENT CHARACTERISTICS Limits Monitoring Requirements Monthly Average Daily Maximum Measurement Fre uenc Sample Type Sample Location Flow 0 003 MGD Weekly Instantaneous Influent or Effluent BOD, 5-day (20°C) 30 0 mg/L 45 0 mg/L. 2/Month Grab Effluent Total Suspended Solids 30 0 mg/L. 45 0 mg/L 2/Month Grab Effluent NH3 as N Monthly Grab Effluent Fecal Coliform (geometric mean) 200/100 ml 400/100 ml 2/Month Grab Effluent Total Residual Chlorine 28 p g/L 2/Week Grab Effluent Temperature (°C) Weekly Grab Effluent pHi 2/Month Grab Effluent Footnotes, 1. The pH shall not be less than 6 0 standard units nor greater than 9 0 standard units There shall be no discharge of floating solids or visible foam in other than trace amounts NANTAHALA ELEMENTARY SCHOOL — NCO067318 SPECULATIVE EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period beginning upon rerating to 0 003 MGD and lasting until expiration, the Permittee is authorized to discharge from outfall 001 Such discharges shall be limited and monitored by the Permittee as specified below - EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Daily EMaximum Measurement Frequency Sample Type Sample Location Flow 0 003 MGD Weekly Instantaneous Influent or Effluent BOD, 5-day (20°C) 30 0 mg/L 45 0 mg/L Weekly Grab Effluent Total Suspended Solids 30 0 mg/L 45 0 mg/L Weekly Grab Effluent NH3 as N 2/Month Grab Effluent Temperature (°C) Weekly Grab Effluent There shall be no discharge of floating solids or visible foam in other than trace amounts. Macon County 130E - Nantahala School Residual Ch.lotine ,Ammonia as NH3 (summer) 7Q10 (CFS) 16 7Q10 (CFS) 1 6 DESIGN FLOW (MGD) 0,003 DESIGN FLOW (MGD) 0 003 DESIGN FLOW (CFS) 000466 DESIGN FLOW (CFS) 0,00465 STREAM STD (UG/L) 170 STREAM STD (MG/L) 1 0 UPS BACKGROUND LEVEL (1 0 UPS BACKGROUND LEVEL 0,22 IWC (%) 029 [WC (%) 0,2,9 Allowable Concentration (ugi 5866.46 Allowable Concentration (sn 269,39 Ammonia as NH3 (winter) 7Q10 (CFS) �u` 158 _0 Fecal Limit 200/100-ml DESIGN FLOW (MGD) 003 Ratio of 344.1 '1 DESIGN FLOW (CFS') 000465 .STREAM STD (_MG/L) 1 8 UPS BACKGROUND LEVEL 0.22 ]WO (%) 026 Allowable Concentration (m 613.41 NCO067318 1,/13/2006 y6— /kr 71 January 24, 2006 Mr. Allen Klimek,P.E., Director NCDENR Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 SUBJECT: Request for NPDES Permit Modifications Increase in Monthly Average Flow Cullasaja Elementary School (NC0067326) Nantahala Elementary School (NC0067318) Macon County Schools Dear Mr. Barnette: We are requesting flow increases at the subject Cullasaja and Nantahala Elementary Schools from 0.002 to 0.003 MGD, respectively. Enclosed please find the completed applications and a check for $430. I have attached Engineering Evaluations of each school's wastewater treatment capabilities and the required Engineering Alternative Analyses (EAA) that were prepared by Mr. Bob DeWeese, Environmental Engineer, with NC DPI Plant Operation Section in Raleigh. These evaluations and our historical monthly monitoring data demonstrates that each of these facilities can meet the requested flow increases and still maintain a high quality effluent that will meet the other parametric requirements contained in the permits. Additionally, the EAA's support the existing treatment systems as the most economically feasible alternative. If you have any questions or need additional information regarding this request, please contact Mr. DeWeese at (919)807-3546 or (919)807-3545 FAX. Thank you in advance for your considerations in this permit modification. Sincerely, Dr. Rodney Shotwell, Superintendent Cc: Asheville Regional Office Mr. David Curtis Mr. Bob DeWeese