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Home My WebLink AboutNC0043176_Permit (Modification)_20130412NPDES DOCUHENT !;cANNINL COVER !;ciEET NPDES Permit: NC0043176 Dunn WWTP Document Type: Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Owner Name Change Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: April 12, 2013 This document is printed on reuse paper - ignore any content an the reYerise side i ATA AMENR North Carolina Department of Environment and Natural Resources Division of Water Quality Pat McCrory Charles Wakild, P. E. John E. Skvarla, Ill Governor Director Secretary April 12, 2013 Mr. Dean Gaster, Utilities Director City Of Dunn PO Box 1065 Dunn, NC 28335 Subject: Issuance of Modification Permit NPDES Permit NC0043176 Black River WWTP Facility Class IV Harnett County Dear Mr. Gaster: Division personnel have reviewed and approved your application for modification of the subject permit. The Division concurs that you do meet all the requirements for monitoring frequency reduction for BOD, and it will be implemented in this permit. Be aware your permit may be re- opened and monitoring increased if non-compliance with Exceptional Performance criterion occurs or if impairments to the surface waters occurred that are the result of your plant operation. Please insert the enclosed EFFLUENT LIMITATIONS AND MONITORING page into your permit. You may discard the old page. The changes in this permit modification are effective June 1, 2013. This permit modification is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently amended). Please note that this permit is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality or permits required by the Division of Land Resources, the Coastal Area Management Act or any other federal or local governmental permits that may be required. 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807-63001 FAX: 919-807-6492 Internet www.ncwaterquaIIN.orq An Equal Opportunity l Affirmative Action Employer Nose Carolina �tura!!y City Of Dunn April 12, 2013 Page 2 of 2 If you have any questions concerning this permit, please contact Teresa Rodriguez at telephone number (919) 807-6387 or at email Teresa.rodriguez@ncdenr.gov. df harles Wakild, P.E. Cc: Fayetteville Regional Office/Surface Protection Section EPA Region IV (e-copy) Central Files NPDES Files Permit NC0043176 A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: PARAMETER DISCHARGE LIMITATONS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency , Sample Type ` l 1 Sample Location , ,i ` Flow 3.75 MGD Continuous Recording Influent or Effluent BOD, 5-day, 200C 2 (April 1— October 31) 12.0 mg/L 18.0 mglL 2/week Composite Influent and Effluent BOD, 5-day, 200C 2 (November 1— March 31) 24.0 mg/L 36.0 mg/L 2/week Composite Influent and Effluent Total Suspended Solids2 30.0 mg/L 45.0 mg/L Daily Composite Influent and Effluent NH3 as N (April 1— October 31) 2.0 mg/L 6.0 mglL Daily Composite Effluent NH3 as N (November 1— March 31) 4.0 mg/L 12.0 mg/L Daily Composite Effluent Dissolved Oxygen Daily average > 5.0 mg/L Daily Grab Effluent Fecal Caliform (geometric mean) 200/100mL 400/100mL Daily Grab Effluent Total Residual Chlorine3 28 pg/L Daily Grab Effluent Temperature Daily Grab Effluent Total Phosphorus Monthly Composite Effluent TKN (mglL) Monitor and report Monthly Composite Effluent NO3-N + NO2-N (mg/L) Monitor and report Monthly Composite Effluent Total Nitrogen4 Monthly Composite Effluent Chronic Toxicity5 Quarterly • Composite Effluent pH > 6.0 and < 9.0 standard units Daily Grab Effluent Temperatures See note 6 Grab Upstream & Downstream Dissolved Oxygens See note 6 Grab Upstream & Downstream Total Mercury? Quarterly Grab Effluent • NOTES: 1• Upstream = at NC Highway 217. Downstream = approximately 1400 feet below discharge. 2. The monthly average effluent BOD and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (85% removal). 3. Limit and monitoring requirements apply only if chlorine is added for disinfection. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 4. TN = TKN + NO3-N + NO2-N, where IN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively. 5. Chronic Toxicity (Ceriodaphnia) limit at 1% with testing in March, June, September, and December (see A. (2)). 6. Instream monitoring shall be waived as long as the permittee maintains membership in the Middle Cape Fear River Basin Association (MCFRBA), which conducts comprehensive instream monitoring. If the permittee cancels membership in the MCFRBA, the facility shall begin collecting the listed instream samples immediately at a frequency of 3/week (June - September) and weekly (October -May). 7. Facility shall employ method 1631E for mercury analysis. There shall be no discharge of floating solids or visible foam in other than trace amounts. (Criteria: Check Facility has no more than one civil penalty assessment parameter during the previous three years. OK No convictions for criminal violations OK Facility is not currently under SOC OK Facility not on EPA's Quarterly Noncompliance Report OK 3-yr arithmetic mean of effluent data < 50% monthly average permit limit OK No more than 15 daily sampling results over the 3-year period over 200% of monthly average limit OK Not more than two non -monthly average limit violations during the previous year. OK MA WA BOD, 5-day, 20°C (April 1— October 31)2 12.0 mg/L 18.0 mg/L BOD, 5-day, 20°C (November 1— March 31)2 24.0 mg/L 36.0 mg/L 50% of MA 3 yr average 200% of MA Max 6 5.4 <6OK 24 15. 12 4.3 <12OK 48 18. city of (lien UTILITIES DEPARTMENT POST OFFICE BOX 1065 • DUNN, NORTH CAROLINA 28335 (910) 230-3500 • FAX (910) 230-3590 www,dun n-nc.org March 19, 2013 Division of Water Quality Surface Water Protection Setion-NPDES 1617 Mail Service Center Raleigh, NC 27699-1617 To whom it may concern, NCO Y3i77 Mayor Oscar N. Hams Mayor Pro Tem Bryan Galbreath Council Members Buddy Maness N. Camel! Robinson Billy Tart Chuck Turnage Billy Barfield City Manager Ronald D. Autry 1.S3w4 7 6/?.JIZ P>c pr.)7/3�0/201J Based on DWQ's reduced monitoring guidelines, the City of Dunn would like to request a reduction in BOD monitoring from five (5) times per week to two (2) times per week at its Black River Wastewater Treatment Plant. This is the only parameter we are seeking a reduction in monitoring for. The Black River WWTP currently outsources BOD testing, so this would result in a reduction in operational costs as well. This reduction in BOD monitoring will not affect our continued commitment to preserve our natural resources and protect our environment. Thank you for your consideration. Respectfully, Dean Gaster Utilities Director atablealtach 'illy MAR"' •e.:03 DENR - WATEk C U, Lrry Wa:landa S St nr Ovate• Branch artrere commie ' matters Permit NC0043176 The City of Dunn would like to request a modification of NPDES permit #NC0043176 issued for the Black River Wastewater Treatment Plant. We would like to be considered for reduced monitoring, specifically the BOD parameter. The following criteria have been met by this facility. • This facility has not had any civil penalty assessments within the past 5 years. • The Permittee, nor any of its employees, has ever been convicted of criminal violations of the Clean Water Act. • This facility is not under an SOC • This facility is not on EPA'S Quarterly Noncompliance Report • For the BOD5 parameter, the three year arithmetic mean of effluent data have met the criteria of being less than fifty percent of the monthly average permit limit. Documentation supporting this fact has been included. • This facility does not have a period where it has been over 200% of the monthly average limit for BOD5. • This facility does not have any non -monthly average limit violations. Jan. Feb. March April May June July August Sept. Oct. Nov. Dec. Seasonal limits Nov.1-Mar. 31 permit limit of 24mg/L avg. April 1-Oct. 31 permit of 12mg/L avg. 2010 2011 2012 5.5 3.5 3.3 8.2 3.3 3.5 8.3 4.7 4.9 5.9 3.9 4.3 5 4.5 8.2 5.1 4.9 5.5 5.2 4.7 5 6.1 3.8 8.8 5.6 4.1 4.8 3.2 2.5 3.3 3.5 3.8 4.2 4.2 2.7 5.6 5.94 3.6 4.3 5.16 4.06 5.7 50% of 3yr. Arith. Mean for seasonal permit limits 50% of 24mg/L= 12mg/L 4.61mg/L < 12mg/L 50% of 12mg/L=6mg/L 4.97mg/L < 6mg/L 3yr. Arith. Mean 4.61mg/L 3yr. Arith. Mean 4.97mg/L OR Annual Arith. Mean of the seasonal limit is 18mg/L with 50% being 9mg/L. The 3 yr. Arith. Mean is 4.79. 4.79mg/L < 9mg/L