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HomeMy WebLinkAboutNC0025453_Draft Permit_200301085 4 January 8, 2003 Dear Mr. Biggs: Mr. Steve Biggs, Manager Town of Clayton P.O. Box 879 Clayton, North Carolina 27520 Michael F. Easley, Governor William G. Ross, Jr., Secretary Alan W. Klimek, P.E., Director State of North Carolina Department of Environment and Natural Resources Division of Water Quality Attached to this letter is the draft NPDES permit for the Town of Clayton’s Little Creek Water Reclamation Facility renewal and expansion to 2.5 MGD. NPDES Permit No. NC0025453. The following changes have been made to the permit and are reflected in this draft: The effluent limits pages for the expansion to 2.5 MGD have been included (along with the existing design flow of 1.9 MGD). Reasonable potential to exceed the acute values for copper, zinc, and silver still exist. Copper and zinc monitoring will remain at a frequency of 1 /month. Because Clayton is consistently passing the toxicity testing requirement, silver monitoring will be reduced to monthly during this permit cycle. Based on outstanding comments from EPA, the Division of Water Quality was required to implement a policy to adopt weekly average NH3-N (ammonia) limits for municipalities, as required by the Code of Federal Regulations. This implementation policy was adopted October 15, 2002. The weekly average values are three times the monthly average values (this value was established based on a review of treatment capability at various municipal plants). This permit includes both monthly average and weekly average limits for NH3-N for the existing flow and the expanded flow. In order to have complete information for the next permit renewal, the pollutant scan has been added to the permit (ref. Condition A.(7.)). Based on a statistical analysis (reasonable potential analysis - RPA) of the existing data, the Division has determined that no reasonable potential to exceed the water quality acute level for lead exists, so lead monitoring will be eliminated from the permit. However, the Town will still be required to perform quarterly monitoring via the pretreatment Long Term Monitoring Plan. Subject: NPDES Draft Permit Clayton - Little Creek WRF Permit No. NC0025453 Johnston County j NCDENR North Carolina Department of Environment and Natural Resources The Division received Mr. Mistry’s letter dated December 3. 2002. regarding concerns about treatment capability during the construction phase to install biological nutrient removal. As Mr. Schuster, Water Quality Supervisor - Raleigh Regional Office, stated in his letter dated November 5. 2002. the Division cannot offer interim limits during construction phases. All facilities in the process of an upgrade are required to provide a construction sequence to ensure that existing limits are maintained and to determine measures that can be taken to reduce impact of the construction. The Town should make every effort to sequence construction to minimize any adverse impacts to operation of the plant (and consequently, the receiving stream). 161 7 Mail Service Center, Raleigh, North Carolina 27699-161 7 - Telephone 91 9-733-5083/FAX 91 9-733-0719 An Equal Opportunity Affirmative Action Employer - 50% recycled/ 10% post-consumer paper Visit us on the web at http://h2o.enr.state.nc.us/NPDES z>A. Sincerely, cc: Any comments regarding the draft permit should be submitted no later than February 15, 2003. If you have any questions regarding the draft NPDES permit, please contact Susan Wilson at (919) 733 - 5083, extension 510. Please review these documents very carefully to ensure a thorough understanding of the information, conditions, and requirements contained therein. Once a permit is issued, except for typographical or technical errors, the permit may be appealed only through the legal process. Raleigh Regional Office/Water Quality Section NPDES Unit EPA Region IV, Roosevelt Childress Shankar Mistry, Ph.D., P.E.The Wooten Company 120 North Boylan Avenue Raleigh, NC 27603 Mr. Biggs NC0025453 2 i x /□'avid A. Goodrich, Supervisor NPDES Unit r Permit No. NC0025453 PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM is hereby authorized to discharge wastewater from a facility located at to receiving waters designated as the Neuse River in the Neuse River Basin This permit shall become effective This permit and the authorization to discharge shall expire at midnight on March 31, 2008. Signed this day DRAFT In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Water Quality Commission, and the Federal Water Pollution Control Act, as amended. in accordance with the discharge limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof. STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY Town of Clayton Little Creek Water Reclamation Facility Alan W. Klimek. P.E., Director Division of Water Quality By the Authority of the Environmental Management Commission Little Creek Water Reclamation Facility On Durham Street Extension Clayton Johnston County Clavton WWTP NPDES No. N00025453 1 Permit No. NC0025453 SUPPLEMENT TO PERMIT COVER SHEET is hereby authorized to: 1. 2. 3. Discharge wastewater from said treatment works at the location specified on the attached map into the Neuse River, which is classified WS-IV NSW CA waters, in Neuse River Basin. After receiving an Authorization to Operate from the Division of Water Quality, the Town may operate the facility to a maximum design flow of 2.5 MGD, and discharge to the point listed above. Town of Clayton Little Creek Water Reclamation Facility Town of Clayton NPDES No. NC0025453 Continue to operate an existing 1.9 MGD wastewater treatment facility consisting of a mechanical bar screen, grit removal, parshall flume with flow measurement, primary clarifier/digester, trickling filter, dual oxidation ditches,.-dual—secondary ' clarifiers, tertiary filters, ultraviolet disinfection, chlorine contact chamber, sulfur dioxide dechlorination, sludge thickener tank, aerobic sludge digester, and sludge drying beds located at the Little Creek Water Reclamation Facility, Durham Street Extension, Clayton, Johnston County, and Discharge Point Latitude: North /r^ j \<200' Facility Location Clayton Little Creek WRF NC0025453 78°25’ 26” E25NW, Clayton 35°39’50”Sub-Basin: 03-04-02 Longitude: Quad #: Stream Class: WS-IV, NSW CA Receiving Stream: Neuse River, Neuse River Basin Permitted Flow: 1.9 MGD, to 2.5 MGD H Ceml A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL Effluent Characteristics Monitoring RequirementsLimits Sample Type RecordingFlow Daily Composite5.0 mg/l 7.5 mg/l Composite15.0 mg/l Daily10.0 mg/l Daily Composite30.0 mg/l 45.0 mg/l 200/100 ml 400/100 ml Grab28 pg/l TN Load6 6-9 (Footnotes on next page) During the period beginning on the effective date of the permit and lasting until expansion or expiration, the Permittee is authorized to discharge 1.9 MGD of municipal wastewater from outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: Weekly Average Daily Maximum Town of Clayton NPDES No. NCOO25453 Fecal Coliform (geometric mean) Fecal Coliform (geometric mean) Conductivity Conductivity 2.0 mg/l 4.0 mg/l 6.0 mg/l 12.0 mg/l Measurement Frequency Continuous Quarterly Monthly Monthly Monthly Daily Daily Weekly Weekly Weekly Monthly Monthly Annually Weekly Daily 3/Week Daily Daily Daily 3/Week Daily 3/Week Composite Composite Grab Grab Composite Composite Composite Calculated Calculated Calculated Composite Grab Grab Composite Composite Composite Composite Grab Grab Grab Grab Grab Sample Location1 Influent or Effluent Influent & Effluent Influent & Effluent Influent & Effluent Effluent Effluent Effluent Upstream & Downstream Effluent Upstream & Downstream Effluent Effluent Effluent Upstream & Downstream Effluent Upstream & Downstream Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent NHaasN (April 1-October 31] NHa as N [November 1 - March 31] Dissolved Oxygen3__________ Dissolved Oxygen Daily 3/Week BOD, 5 day (209C)2 [April 1 - October 31] BOD, 5 day (209C)2 [November 1 - March 31] Total Suspended Residue2 Total Residual Chlorine4 TKN (mg/l)__________ NO2-N + NO3-N (mg/l) TN (mg/l)5__________ Total Monthly Flow (MG) Monthly Average 1.9 MGD Chronic Toxicity9 Copper_______ Zinc________ Silver________ pH19 Monitor & Report Monitor & Report Monitor & Report Monitor & Report Monitor & Report 21,400 Ib/year (Annual Mass Loading)7 2.0 mg/L (Quarterly Average)Total Phosphorus 8 Temperature (9C) Temperature (9C) Footnotes: 3. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/1. 9. There shall be no discharge offloating solids or visible foam in other than trace amounts. 2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85% removal). Per 15A NCAC 2B .0505(c)(4), stream sampling (as well as influent/effluent sampling) may be discontinued when flow conditions could result in injury or death of the person(s) collecting the samples. In such cases, on each day that sampling is discontinued, written justification shall be specified in the monitoring report for the month in which the event occurred. Chronic Toxicity (Cenodaphnia dubia) P/F at 1.6%: March, June, September, and December (see Special Condition A.(5)]. Toxicity monitoring shall coincide with metals monitoring. 1. Sample locations: E - Effluent, I - Influent, U - Upstream at NCSR 1700, D - Downstream at (1) NC Highway 42 and (2) NCSR 1908. Stream samples shall be grab samples and shall be collected 3/Week during June - September and 1/Week during the remaining months of the year. Instream monitoring is provisionally waived in light of the permittee’s participation in the Lower Neuse Basin Association. Instream monitoring shall be conducted as stated in this permit should the permittee end its participation in the Associaiton. A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL (Continued) Town of Clayton NPDES No. NC0025453 6. TN Load is the mass load of TN discharged by the Permittee in a period of time. See Special Condition A.(3.), Calculation of TN Loads. 10. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample. 4. Total residual chlorine is required only if chlorine is used as a disinfectant (or elsewhere in the process). 5. TN means Total Nitrogen. For a given wastewater sample, TN is the sum of Total Kjeldahl Nitrogen and Nitrate-Nitrite Nitrogen: TN = TKN + NO2-N + NO3-N. 8. The quarterly average for total phosphorus shall be the average of composite samples collected weekly during the calendar quarter (January-March, April-June, July-September, October- December). 7. The annual TN Load limit shall become effective with the calendar year beginning on January 1, 2003. Compliance with this limits shall be determined in accordance with Special Condition A.(4.), Compliance with Annual Limits for Total Nitrogen. A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL Effluent Characteristics Monitoring RequirementsLimits Sample Type RecordingFlow CompositeDaily5.0 mg/l 7.5 mg/l CompositeDaily10.0 mg/l 15.0 mg/l CompositeDaily30.0 mg/l 45.0 mg/l 200/100 ml 400/100 ml Grab28 pg/l 6-9 (Footnotes on next page) During the period beginning upon expansion above 1.9 MGD or expiration, the Permittee is authorized to discharge up to 2.5 MGD of municipal wastewater from outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: Weekly Average Daily Maximum Town of Clayton NPDES No. NC0025453 Fecal Coliform (geometric mean) Fecal Coliform (geometric mean) Conductivity Conductivity 1.0 mg/l 2.0 mg/l Monitor & Report Monitor & Report Monitor & Report Monitor & Report Monitor & Report (Ib/month) 21,400 Ib/year (Annual Mass Loading)7 2.0 mg/L (Quarterly Average) 3.0 mg/l 6.0 mg/l Measurement Frequency Continuous Quarterly Monthly Monthly Monthly Daily Daily Weekly Weekly Weekly Monthly Monthly Annually Weekly Daily 3/Week Daily Daily Daily 3/Week Daily 3/Week Daily 3/Week Composite Composite Grab Grab Composite Composite Composite Calculated Calculated Calculated Composite Grab Grab Composite Composite Composite Composite Grab Grab Grab Grab Grab Sample Location1 Influent or Effluent Influent & Effluent Influent & Effluent Influent & Effluent Effluent Effluent Effluent Upstream & Downstream Effluent Upstream & Downstream Effluent Effluent Effluent Upstream & Downstream Effluent Upstream & Downstream Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Chronic Toxicity9 Copper_______ Zinc_________ Silver________ pH19 Monthly Average 2.5 MGD Total Residual Chlorine4 TKN (mg/l) NO2-N + NO3-N (mg/l) TN (mg/l)5__________ Total Monthly Flow (MG) TN Load6 NHa as N [April 1 - October 31) NHa as N [November 1 - March 31] Dissolved Oxygen3__________ Dissolved Oxygen BOD, 5 day (209C)2 [April 1 - October 31] BOD, 5 day (20?C)2 [November 1 - March 31] Total Suspended Residue2 Total Phosphorus8 Temperature (9C) Temperature (9C) Footnotes: 3. 'fhe daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/1. 4. There shall be no discharge of floating solids or visible foam in other than trace amounts. 2. The monthly average effluent BODS and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85% removal). 10. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample. Per 15A NCAC 2B .0505(c)(4), stream sampling (as well as influent/effluent sampling) may be discontinued when flow conditions could result in injury or death of the person(s) collecting the samples. In such cases, on each day that sampling is discontinued, written justification shall be specified in the monitoring report for the month in which the event occurred. Total residual chlorine is required only if chlorine is used as a disinfectant (or elsewhere in the process). 1. Sample locations: E - Effluent, I - Influent, U - Upstream at NCSR 1700, D - Downstream at (1) NC Highway 42 and (2) NCSR 1908. Stream samples shall be grab samples and shall be collected 3/Week during June - September and 1/Week during the remaining months of the year. Instream monitoring is provisionally waived in light of the permittee’s participation in the Lower Neuse Basin Association. Instream monitoring shall be conducted as stated in this permit should the permittee end its participation in the Associaiton. A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL (Continued) Town of Clayton NPDES No. NC0025453 5. TN means Total Nitrogen. For a given wastewater sample, TN is the sum of Total Kjeldahl Nitrogen and Nitrate-Nitrite Nitrogen: TN = TKN + NO2-N + NO3-N. 6. TN Load is the mass load of TN discharged by the Permittee in a period of time. See Special Condition A. (3.), Calculation of TN Loads. 7. The annual TN Load limit shall become effective with the calendar year beginning on January 1, 2003. Compliance with this limits shall be determined in accordance with Special Condition A.(4.), Compliance with Annual Limits for Total Nitrogen. 8. The quarterly average for total phosphorus shall be the average of composite samples collected weekly during the calendar quarter (January-March, April-June, July-September, October- December). 9. Chronic Toxicity (Ceriodaphnia dubia) P/F at 1.6%: March, June, September, and December [see Special Condition A. (6)1. Toxicity monitoring shall coincide with metals monitoring. 8.34 = (b) (c) (2.) The Division must receive notification no later than August 31 for changes proposed for the following calendar year. For the purpose of Condition (a)(2) above, an association’s Co-Permittee Members in any calendar year shall be as defined in its group NPDES permit. (1.) Changes in an association’s membership become effective only through modification of its NPDES permit. (2.) Such changes become effective on January 1 following permit modification. (3.) Beginning on January 1 of each year, the association’s membership is fixed for the remainder of the calendar year. Town of Clayton NPDES No. NC0025453 A. (4). COMPLIANCE WITH ANNUAL LIMITS FOR TOTAL NITROGEN (a) A. (3.). CALCULATION OF TN LOADS (a) The Permittee shall calculate monthly and annual TN Loads as follows: (1) Monthly TN Load (Ib/mo) = TN x TMF x 8.34 where: TN For any given calendar year, the Permittee shall be in compliance with the annual TN Load limit in this permit if: (1.) the Permittee’s annual TN Load is less than or equal to said limit, or (2.) the Permittee is a Member of a group compliance association and a Co-Permittee to that association’s group NPDES permit, in which case the Permittee’s TN discharge is governed primarily by the association’s permit. If the Permittee elects to become a Co-Permittee Member of a group compliance association or if it withdraws or otherwise loses its Co-Permittee Member standing in an association, it must notify the Division in writing of the proposed change. (1.) Notification shall be sent to: NCDWQ / NPDES Unit Attn: Neuse River Basin Coordinator 1617 Mail Service Center Raleigh, NC 27699-1617 the average Total Nitrogen concentration (mg/L) of the composite samples collected during the month TMF = the Total Monthly Flow of wastewater discharged during the month (MG/mo) conversion factor, from (mg/L x MG) to pounds (2) Annual TN Load (Ib/yr) = Sum of the 12 Monthly TN Loads for the calendar year (b) The Permittee shall report monthly Total Nitrogen results (mg/L and Ib/mo) in the discharge monitoring report for that month and shall report each year's annual results (Ib/yr) in the December report for that year. A. (5.) CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 1.6 %. The permit holder shall perform at a minimum, quarterlti monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,” Revised February 1998, or subsequent versions or “North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure” (Revised-February 1998) or subsequent versions. The tests will be performed during the months of March, June, September, and December. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple-concentration testing shall be performed at a minimum, in each of the two following months as described in “North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure” (Revised-February 1998) or subsequent versions. The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable impairment of reproduction or survival. The definition of “detectable impairment,” collection methods, exposure regimes, and further statistical methods are specified in the “North Carolina Phase 11 Chronic Whole Effluent Toxicity Test Procedure” (Revised-February 1998) or subsequent versions. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address: Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of “No Flow” in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at the address cited above. Town of Clayton NPDES No. NC0025453 Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re­ opened and modified to include alternate monitoring requirements or limits. Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days after the end of the reporting period for which the report is made. Attention: North Carolina Division of Water Quality Environmental Sciences Branch 1621 Mail Service Center Raleigh, North Carolina 27699-1621 A. (5.) CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) (cont’d.) A. (6.) CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnin dubia at an effluent concentration of 2.0 %. The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the “North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,” Revised February 1998, or subsequent versions or “North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure” (Revised-February 1998) or subsequent versions. The tests will be performed during the months of March, June, September, and December. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple-concentration testing shall be performed at a minimum, in each of the two following months as described in “North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure” (Revised-February 1998) or subsequent versions. The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable impairment of reproduction or survival. The definition of “detectable impairment,” collection methods, exposure regimes, and further statistical methods are specified in the “North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure” (Revised-February 1998) or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address: Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days after the end of the reporting period for which the report is made. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of “No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at the address cited above. Town of Clayton NPDES No. NC0025453 NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. Attention: North Carolina Division of Water Quality Environmental Sciences Branch 1621 Mail Service Center Raleigh, North Carolina 27699-1621 A. (6.) CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) (cont’d.) Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this pennit may be re­ opened and modified to include alternate monitoring requirements or limits. Town of Clayton NPDES No. NC0025453 NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. 1. 2. 3. 4. Bis (2-chloroethyl) ether Bis (2-chloroisopropyl) ether Bis (2-ethylhexyl) phthalate 4-bromophenyl phenyl ether Butyl benzyl phthalate 2 - chloronaph thalene 4-chlorophenyl phenyl ether Chrysene Di-n-butyl phthalate Di-n-octyl phthalate Dibenzo(a,h)anthracene 1.2- dichlorobenzene 1.3- dichlorobenzene 1.4- dichlorobenzene 3.3- dichlorobenzidine Diethyl phthalate Dimethyl phthalate 2.4- dinitrotoluene 2.6-dinitro toluene 1,2-diphenylhydrazine Fluoranthene Fluorene Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclo-pentadiene Hexachloroethane lndeno(l ,2.3-cd)pyrene Isophorone Naphthalene Nitrobenzene N - nitrosodi- n - propylamine N-nitrosodimethylamine N-nitrosodiphenylamine Phenanthrene Pyrene 1.2.4-trichlorobenzene Ammonia (as N) Chlorine (total residual, TRC) Dissolved oxygen Nitrate/Nitrite Total Kjeldahl nitrogen Oil and grease Total Phosphorus Total dissolved solids Hardness Town of Clayton NPDES No. NC0025453 Antimony Arsenic Beryllium Cadmium Chromium Copper Lead Mercury Nickel Selenium Silver Thallium Zinc Cyanide Total phenolic compounds Volatile organic compounds: Acrolein Acrylonitrile Benzene Bromoform Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane 2-chloroethylvinyl ether Chloroform Dichlorobromomethane 1.1 dichloroethane 1.2 dichloroethane Trans-1,2-dichloroethylene 1.1 -dichloroethylene 1.2- dichloropropane 1.3- dichloropropylene Ethylbenzene Methyl bromide Methyl chloride Methylene chloride 1.1.2.2- tetrachloroethane Tetrachloroethylene Toluene 1.1.1 -trichloroethane 1.1.2- trichloroe thane Trichloroethylene Vinyl chloride Acid-extractable compounds: P-chloro-m-creso 2-chlorophenol 2.4- dichlorophenol 2.4- dimethylphenol 4.6- dinitro-o-cresol 2.4- dinitrophenol 2-nitrophenol 4-nitrophenol Pentachlorophenol Phenol 2.4.6- trichlorophe nol Base-neutral compounds: Acenaphthene Acenaphthylene Anthracene Benzidine Benzo(a)anthracene Benzo(a)pyrene 3,4 benzofluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Bis (2-chloroethoxy) methane A. (7.) EFFLUENT POLLUTANT SCAN The permittee shall perform an annual pollutant scan of its treated effluent for the following parameters: The total set of samples analyzed during the current term of the permit must be representative of seasonal variations. Samples shall be collected and analyzed in accordance with analytical methods approved under 40 CFR Part 136. Unless indicated otherwise, metals must be analyzed and reported as total recoverable. Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the Director, within 90 days of sampling. Two copies of the report shall be submitted along with the DMRs to the following address: Division of Water Quality. Water Quality Section, Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617. J SUMMARY Permit Writer: Date: 1.6 4952 January 2^v2003 DENR/DWQ FACT SHEET FOR NPDES PERMIT DEVELOPMENT NPDES No. NC0025453, Clayton/ Little Creek WRF 303(d) Listed?: Subbasin:_________ Drainage Area (mi2): Summer 7Q10 (cfs) Winter 7Q10 (cfs): Average Flow (cfs): 1WC (%):___________ Primary SIC Code: Receiving Stream: Stream Classification: Regional Office: Quad RRO E25NW Clayton S. Wilson Applicant/Facility Name: Applicant Address:_____ Facility Address:_______ Permitted Flow_________ Type of Waste:_________ Facility/Permit Status: County: Point source rules regarding control of TN and TP have been passed by the EMC. To address the nutrient reduction issue, the Town is a participant in the Neuse River Compliance Association (this will allow the facility to comply with the nitrogen limit through the Association). 1 he Town also is currently in the process of seeking approval for biological nutnent removal through the Construction Grants & Loans section. NC0025453 Clayton NPDES Renewal & Expansion to 2.5 MGD Page I Facility Information _________ Town of Clayton/ Little Creek Water Reclamation Facility P.O. Box 879, Clayton, NC 27520 Durham Street Extension_________________ 1.9 MGD (expansion request to 2.5 MGD) ~ 22% Ind., -78% Domestic (at permitted flow)_________ Renewal____________ Johnston______________ Miscellaneous ~ Neuse River WS-IV NSW CA SI: 27-41.3 Yes___________ 030402_______ 1150_________ 186 (regulated) Clayton operates a 1.9 MGD wastewater treatment facility that discharges into the Neuse River Average annual how has been approximately 1.4 MGD (appx. 74% of permitted flow). Due to ? thiS area °UtSide of RaleiSh- Clayton proposes to expand from 1.9 MGD to 2.5 MGD. The Town will accomplish this through some construction additions and the re-rating of the existing plant. An ‘Authorization to Operate’ will have to be attained prior to the expansion to 2.5 MGD - to ensure that all components can accommodate the increase in flow. This expansion is not the 20 year projected flow, but will provide Clayton with some capacity for growth. The Town is also in the process of adding biological nutrient removal which would ultimately decrease the nitrogen load to the Neuse River 1 he Modeling Unit evaluated the impact of increased wastewater Hows on dissolved oxvgen levels, using a QUAL2E model already developed for the Neuse River. The results show that with an increase in the Town's discharge to 2.5 MGD, the D.O. level in the river will remain above the standard of 5.0 mg/L. Thus, the modeling results indicate the adverse impact of the expanded discharge to be acceptable. F An alternative analysis was done to ensure that the discharge from this regional facility was the most feasible alternative. [There are no nearby, cost effective areas for spray application of the expanded how. Due to the distance and cost, discharge to the City of Raleigh was not a feasible option. Clayton continues to divert some wastewater to Johnston County. The Town has received some grant funding for diverting re-use wastewater to a nearby golf course.). The CLyton facility discharges to the mainstem of the Neuse River. According to the Basinwide ater Quality Management Plan for the Neuse, the primary water quality considerations for nutrients11^068 m baSin are discharges of (U oxygen-demanding substances and (2) Antidegradation Chronic P/F at 2.0 % (at 2.5 MOD) Clayton monitors for copper, zinc, silver, and lead through the NPDES permit. Clayton has had 1 failure during the previous 5 years (that failure was followed-up with 2 passes). The Town of Clayton operates under an approved pretreatment program and must comply with its Long Term Monitoring Plan (LTMP). As part of the pretreatment program, Clayton monitors for arsenic, cadmium, chromium, mercury, molybdenum, nickel, selenium, and cyanide (and these will continue through the pretreatment program) - copper, zinc, silver, and lead are also required. Most values have been below detection level, and well below allowable levels, for all except molybdenum. There is no water quality standard for molybdenum (and Mo will continue to be monitored through the pretreatment program and the residuals permit), so no limit or monitoring requirement will be imposed in the NPDES permit. Other than conventional parameters, the parameters sampled in the application only had above detection levels for copper, lead, silver, and zinc (which are currently monitored through the permit). No changes are proposed based on information in the permit application. Copper, silver and zinc will continue to be monitored due to the potential to exceed the action level standard at the acute level. Copper and Zinc will be monitored at 1/month due to Clayton’s “pass" on toxicity testing. Silver monitoring will be reduced to 1/month. Lead monitoring will remain at a quarterly frequency. NCOO25453 Clayton NPDES Renewal &. Expansion to 2.5 MGD Pase 2 The Town of Clayton prepared an Environmental Assessment demonstrating that the recommended alternative is the most environmentally sound of the reasonably cost-effective options. The Division issued a Finding of No Significant Impact (FONSI) for the expansion on February 24, 2002. The Division of Water Quality determined that the incremental impact of the increased discharge will not result in contravention of applicable water quality standards or loss of the river’s designated uses. The Division concluded that expansion of the existing treatment plant and continued discharge to the Neuse River is the most feasible alternative. The expanded plant will serve as a regional treatment facility for the area. The Division has determined that the proposed expansion is necessary to accommodate social and economic growth in the area and that it will not result in contravention of surface water quality standards or loss of designated uses in the receiving stream. TOXICITY TESTING: Current Requirement: Chronic P/F @ 1.6% (at 1.9 MGD) COMPLIANCE SUMMARY: BASED ON THE PREVIOUS 2 YEARS Clayton has had some limit excursions for ammonia and BOD5 (in the past 2 years), with values below the threshold for automatic civil penalties. Additional treatment capacity may help eliminate these minor excursions. INSTREAM MONITORING: Clayton is part of the Lower Neuse Basin Association (LNBA) and is not required to perform the instream monitoring required in this permit. (The LNBA monitors several sites for various facilities along the Neuse River). PROPOSED CHANGES: Clayton has been accepted as a member of the Neuse River Compliance Association. Special language has been inserted into the permit regarding the compliance stipulation for total nitrogen. The total phosphorus limit of 2 mg/1 was instituted in the previous permit (and since Clayton is a member of the Compliance Association, the 2 mg/1 TP limit is applied again in this permit). REGIONAL OFFICE COMMENT: (Staff report received October 29, 2002). £ NAME: DATE: Lead will be eliminated because the reasonable potential analysis showed that lead levels were below the acute value. Lead will continue to be monitored quarterly via the facility’s pretreatment program LTMP. An annual priority pollutant scan has also been inserted in the permit to ensure that the permittee complies with the requirement in the municipal permit applications. Based on the NH3-N policy adopted October 15, 2003, weekly average NH3-N limits have been inserted for the existing flow (1.9 MGD) and the expansion flow (2.5 MOD). NC0025453 Clayton NPDES Renewal & Expansion to 2.5 MGD Page 3 STATE CONTACT: If you have any questions on any of the above information or on the attached permit, please contact Susan Wilson, P.E. at (919) 733-5038 ext. 510. I nlI ^^3. PROPOSED SCHEDULE FOR PERMIT ISSUANCE: Draft Permit to Public Notice: After Jan. 8, 2003 Permit Scheduled to Issue: Feb 28, 2003 (est.) 3 __I w OCTMAYJUNJULAUGSEPMARAPRYEAR JAN FEB >100 >100 >100 1WC(%):IOO + NonCamp: Single IWC(%):I3 I + NonComp:Single IWC(%):60.78 + NonComp: Single IWC(%)5.0 Pass PassNonComp: Single I WC(%):1.8 Pass Pass+ NonComp: Single >100 >100>10094.9 IWC(%):100 + NonComp: Single >6.64 >664 >100,»100 Pass I\VC(%):2.4 PassPass+ NonComp: Single IWC(%)3.0 NonComp: Single >100.>100 >100IWC(%):100 ¥ Pre 1998 Data Available 1998 Pass 1999 — 2000 — 2001 2002 Pass 2001 2002 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass I I Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass.’lOO Pass Pass Pass NR/H H Pass NR/Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Late >90 Fail Pass Fan LEGEND: PERM = Permit Requirement Begin = First month required PF = Permitted flow (MOD) Pass Fail NR/Pass Pass Pass >90 Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Fail Pass Pass Pass Late Pass,Pass Pass Pass >90 Pass Pass Pass >90 Pass Pass Pass Pass Pass Pass Fall Pass Pass Pass Pass NR Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Pass Fail Pass November 13, 2C NOV DEC Clarcmont-McLin Creek WWTP NCOOXI370/OOI Begin-6/l/200l County: Catawba PF: 0.3 7Q10: 5.0 Late Pass Pass Pass H Fail Pass Pass >100 Pass Pass Pass Pass Pass H >90 Pass Pass Pass >90 Pass Pass Pass Pass Pass Clariant Corp.-Mt. Holly Plant NC0004375/00! Begin: 9/1/1991 County: Mecklenburg PF: 3.9 7Q10: 329 1998 — 1999 - 2000 — 2001 2002 — 1998 — 1999 - 2000 Pass 2001 2002 >100 1998 - 1999 — 2000 >100 2001 — 2002 — 1998 Pass 1999 Pass 2000 Fail >100 Pass ¥ 1998 - 1999 — 2000 - 2001 2002 - 1998 - 1999 - 2000 — 2001 2002 — 1998 I 1999 I 2000 I 2001 | 2002 I Perm chr Um: 9% Frequency: Q Jan Apr Jul Oct Region: MRO Subbasin: CTB32 Special ) Order: 1998 Pass 1999 Pass 2000 Pass 2001 pass 2002 Pass.Pass 1998 Pass 1999 Pass 2000 Pass 2001 Pass 2002 Pass Clarkton WWTP pcnn chr •>m: 90% NC0021610/001 Begin: 12/1/1999 Frequency: Q JanAprJulOct County: Bladen Region: FRO Subbasin: LUM58 PF: 0.24 Special 7QI0: 0.0 IWC(%):100 Order. PERM CHR L1M: 1.8% Frequency: Q P/F + Mar Jun Sep Dec Region: MRO Subbasin: CTB34 Special I Order: Clayton WWTP Penn chr lim: 1 6% NC0025453/001 Begin:9/l/2000 Frequency: Q Mar Jun Sep Dec County: Johnston Region: RRO Subbasin: NEU02 PF- I 9 Special 7Q10; 186 IWC(%):L6 Order: Cleveland WWTP I’emt chr lim: 3.0% NC0049867/001 Begin: 3/1/2000 Frequency: Q Mar Jun Sep Dec County: Rowan Region: MRO Subbasin: YAD06 PF: 0.27 Special 7QI0: 14.0 IWC(%)3.0 Order: Whole Effluent Toxicity Testing Self-Monitoring Summary FACILITY REQUIREMENT______________________________ Citgo-Paw Crk Bulk Terminal P=nn: 24hr LC50 ac monit epis ftltd (grab) NC002I962/001 Begin:9/1/2001 Frequency: A NonComp. County: Mecklenburg Region: MRO Subbasin: CTB34 PF: NA Special 7Q10: 0.0 IWC(%):l00 Order Clintnn-Larkins WPCF Perm chr lim: 90% NC0020117/001 Begin:8/I/I996 Frequency. Q P/F + Mar Jun Sep Dec County: Sampson Region: FRO Subbasin: CPF19 PF: 5.0 Special 7Q10: 0.0 IWC(%):100 Order: LET = Administrative Letter - Target Frequency = Monitoring frequency: Q- Quarterly; M^ Monthly; BM- Bimonthly; SA- Semiannually; A- Annually; OWD-^Only when discharging; IT Discontinued momtonng requirement ,, PWC% =^InstrcTm waste concentration ' ' P/F = Pass'Faii test E AC = Acute P CHR = Chronic Data Notation: f - Fathead Minnow; • - Ccnodaphnia sp.; my - Mysid shrimp; ChV - Chronic value; P - Mortality of stated percentage at highest concentration; at - Performed by DWQ Aquatic Tox Unit; bt - Bad test Reporting Notation: — = Data not required; NR - Not reported Facility Activity Status: I - Inactive. N - Newly IssuedfTo construct); H - Active but not discharging; t-Morc data available for month in question; ■ = ORC signature needed 10 Cleveland Mills/001 PERM CHR LIM: 2.4%; IF EXP>.78MGD @ 3.4% NC00041211/001 Begin:9/1/1993 Frequency: Q P/F + Mar Jun Sep Dec NonComp:SINGLE County: Cleveland Region: MRO Subbasin: BRD04 PF: 0.78 Special 7QI0. 49.40 IWC(%):2.4 Order: Claremont North WWTP Perm chr lim: 13% NC0032662/001 Begin: 4/1/2001 Frequency: Q JanAprJulOct County; Catawba Region: MRO Subbasin: CTB32 PF: 0.10 Special 7QI0: 1.0 IWC(%):I3 Order: Claremont South WWTP Pcnn chr lim: 6I% NC0026549/001 Begin: 4/1/2001 Frequency: Q JanAprJulOct County: Catawba Region: MRO Subbasin: CTB32 PF: 0.10 Special 7Q10: 0.10 IWC(%):60.78 Order.