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Home My WebLink AboutNC0023736_Permit (Issuance)_20111230NPDES DOCUHENT SCANNING COVER SHEET NPDES Permit: NC0023736 Gunpowder Creek WWTP Document Type: Permit Issuance • .. wain 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: December 30, 2011 This document is printed on reuse paper - ignore any content on the resrerse side A'A NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Dee Freeman Governor Director Secretary Mr. Mack W. Edminsten Director of Public Utilities City of Lenoir Lenoir, North Carolina 28645 Y8 Dear Mr. Edminsten: ( December 30, 2011 Subject: Issuance of NPDES Permit NC0023736 Gunpowder Creek WWTP Caldwell County Facility Class III Division personnel have reviewed and approved your application for renewal of the subject permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit 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). The Final Permit contains no significant changes from the Draft Permit. This Final Permit maintains the following changes contained in the Draft Permit: • A monthly average and daily maximum limits for Hg have been added to the permit based on a statistical analysis of the effluent data. A monitoring frequency for Hg has been established as Monthly. The permittee may request a minor modification to change the monitoring frequency to Quarterly following 12 consecutive months with values below 12 ng/L. • A monthly average and daily maximum limits for CN have been added to the permit based on a statistical analysis of the effluent data. A monitoring frequency for CN has been established as Monthly. • A daily maximum limit for Se has been removed from the permit based on a statistical analysis of the effluent data. A monitoring frequency for Se has been reduced to Quarterly due to the removal of the limit. • A daily maximum limit for Cr has been removed from the permit based on a statistical analysis of the effluent data. A monitoring frequency for Cr has been reduced to Quarterly due to the removal of the limit. 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807-63001 FAX: 919-807-64921 Customer Senrice:1-877-623-6748 Internet www.ncwaterquaiity.org An Equal Opportunity \ Affirmative Action Employer NorthCarolina Naturally • A daily maximum limit for Pb has been removed from the permit based on a statistical analysis of the effluent data. A monitoring frequency for Pb has been reduced to Quarterly due to the removal of the limit. • Monitoring frequencies for total Cu, total Zn, and total Ag were reduced to Quarterly based on the review of the effluent data. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. 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 permit that may be required. If you have any questions concerning this permit, please contact Sergei Chernikov at telephone number (919) 807-6393. Sincerely, ORIGINAL SIGNED BY Tom Belnick Coleen H. Sullins cc: Central Files NPDES Files 4Asheville Regional Office / Surface Water Protection Section EPA Region IV (e-copy) Aquatic Toxicology Unit (e-copy) 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 Customer Service: 1-877-623-6748 Internet www.ncwaterquaIiity.org An Equal Opportunity \ Affirmative Action Employer NorthCarolina Naturally Permit NC0023736 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, the City of Lenoir is hereby authorized to discharge wastewater from a facility located at Gunpowder Creek Wastewater Treatment Plant NCSR 1127 Caldwell County to receiving waters designated as Gunpowder Creek in the Catawba River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof. The permit shall become effective February 1, 2012. This permit and the authorization to discharge shall expire at midnight on January 31, 2014. Signed this day December 30, 2011. ORIGINAL SIGNED BY Tom Belnick Coleen H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Permit NC0023736 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority, to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. The City of Lenoir is hereby authorized to: 1. Continue to operate an existing 2.0 MGD wastewater treatment facility consisting of the following components: > Mechanical bar screen > Vortex grit removal > Ultrasonic parshall flume flow transmitter > Four -basin sequencing batch reactors > Post -equalization basin > Post equalization pump station > Chlorine contact basin and chlorine feed system > Sulfur dioxide dechlorination system > Step aeration system > Ultrasonic effluent flow transmitter > Sludge holding tank This facility is located at Gunpowder Creek Wastewater Treatment Plant, off NCSR 1127, Caldwell County. 2. Discharge from said treatment works at the location specified on the attached map into Gunpowder Creek, which is classified WS-IV water in the Catawba River Basin. ,`�,-!--t, .- •- ". , ��. r +'may r„ • Aw fir. � �' f€ �' /'r •.'. +�,,, .f- ..��`*.� • ., i __ ? , , ref - - •-, '-\\`s:--- -. i ) Gunpowder Creek WWTP - NC0023736 USGS Quad Name: Granite Falls Receiving Stream: Gunpowder Creek Stream Class: WS-IV Subbasin: Catawba - 03 08 32 Lat.: 35°50'34" Long.: 81°27'49" North Not to SCALE Permit NC0023736 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 from outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: LIMITS MOIITORINGREWIRE MEN 'S; PARAMETER Monthly a Averge .. y. - Weekly. Average Daily _ . M Maximum - `Measurement ; Freq uen, 9, - c3' .. _ Sample Tie- � Sample '1 � Location ; Flow 2.0 MGD Continuous RecordingInfluent or Effluent BOD5 2 30.0 mglL 45.0 mglL Daily Composite Influent & Effluent Total Suspended Solids 2 30.0 mglL 45.0 mg/L Daily Composite Influent & Effluent NH3-N (April 1 - October 31) 2.0 mg/L 6.0 mg/L Daily Composite Effluent NH3-N (November 1- May 31) 4.0 mg/L 12.0 mg/L - Daily Composite Effluent Dissolved Oxygen Daily average > 5.0 mg/L Daily Grab Effluent Dissolved Oxygen Variable3 Grab U, D Fecal Coliform (geometric mean) 200/100 mL 400/100 mL Daily Grab Effluent Fecal Coliform Variable3 Grab U, D pH Between 6.0 and 9.0 standard units Daily Grab Effluent pH Variable3 Grab U, D Total Residual Chlorines 28 pg/L Daily Grab Effluent Temperature Daily Grab Effluent Temperature Variable3 Grab U, D Total Nitrogen Monthly Composite Effluent Total Nitrogen (May 1— September 30) Monthly Grab U, D Total Phosphorus Monthly Composite Effluent Total Phosphorus (May 1— September 30) Monthly Grab U, D Conductivity Daily Grab Effluent Conductivity Variable3 Grab U, D , Chronic Toxicity5 Quarterly Composite Effluent Total Cadmium 4.0 µg/L 27.0 µg1L Weekly Composite Effluent Total Selenium Quarterly Composite Effluent Total Chromium Quarterly Composite Effluent Total Lead Quarterly Composite Effluent Total Copper6 Quarterly Composite Effluent Total Zinc6 Quarterly Composite Effluent Total Silver6 Quarterly Composite Effluent Total Mercury? 12 ng/L 36/ng/L Quarterly Grab Effluent Cyanide 10.0 µg1L 39.0 µglL Quarterly Composite Effluent Notes f also continued on next pagel 1. U: at least 100 feet upstream from the outfall. D: approximately 2,000 feet below the outfall. 2. The monthly average BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). Permit NC0023736 3. Instream sampling shall be conducted 3/Week from June 1 through September 30 and weekly for the other months of the year. 4. 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. 5. Chronic Toxicity (Ceriodaphnia) P/F ® 52% with testing in March, June, September, December (see A. (2)). 6. Monitoring shall be conducted in conjunction with the Whole Effluent Toxicity Test. 7. Sample should be analyzed using low level mercury method EPA 1631E. The permittee may request a minor modification to change the monitoring frequency to Quarterly following 12 consecutive months with values below 12 ng/L. There shall be no discharge of floating solids or foam visible in other than trace amounts. Permit NC0023736 A. (2) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 52 %. 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: Attention: NC DENR / DWQ / Environmental Sciences Section 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days after the end of the reporting period for which the report is made. 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 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 Section at the address cited above. 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 permit may be re -opened and modified to include alternate monitoring requirements or limits. 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. Permit NC0023736 A. (3) EFFLUENT POLLUTANT SCAN The permittee shall perform an Effluent Pollutant Scan for all parameters listed in the table below 3 times during the upcoming permit term (in accordance with 40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal (summer, winter, fall, spring) variations over the 5-year permit cycle. Unless otherwise indicated, metals shall be analyzed as "total recoverable." Additionally, the method detection level and the minimum level shall be the most sensitive as provided by the appropriate analytical procedure. Ammonia (as N) Chlorine (total residual, TRC) Dissolved oxygen Nitrate/Nitrite Total Kjeldahl nitrogen Oil and grease Total Phosphorus Total dissolved solids Hardness 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-trichloroethane Trichloroethylene Vinyl chloride Acid -extractable compounds: P-chloro-m-cresol 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-trichlorophenol 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 Bis (2-chloroethyl) ether Bis (2-chloroisopropyl) ether Bis (2-ethylhexyl) phthalate 4-bromophenyl phenyl ether Butyl benzyl phthalate 2-chloronaphthalene 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-dinitrotoluene 1,2-diphenylhydrazine Fluoranthene Fluorene Hexachlorobenzene Hexachiorobutadiene Hexachlorocyclo-pentadiene Hexachloroethane Indeno(1,2,3-cd)pyrene Isophorone Naphthalene Nitrobenzene N-nitrosodi-n-propylamine N-nitrosodimethylamine N-nitrosodiphenylamine Phenanthrene Pyrene 1,2,4-trichlorobenzene 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. A copy of the report shall be submitted to Central Files to the following address: Division of Water Quality, Water Quality Section, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617. Tom:' rr-� ThENR North Carolina Department of Environment and Natural Resources Division of Water Resources Beverly Eaves Perdue Thomas A. Reeder Dee Freeman Govemor Director Secretary September 15, 2011 MEMORANDUM To: Sergei Chernikov, Phd., Environmental Engineer II, Complex NPDES Unit, Division of Water Quality From: Subject: Response: Jim Adams, PE Regional Engineer NCDENR PWS Asheville Regional Office Review of NPDES Permit NC0023736, City of Lenoir Gunpowder Creek WWTP Caldwell County Concur with the issuance of this permit provided the facility is operated and maintained properly, the stated effluent limits are met prior to discharge, and the discharge does not contravene the designated water quality standards. ❑ Concur with issuance of the above permit, provided the following conditions are met: ❑ Opposes the issuance of the above permit, based on reasons stated below, or attached: Signed: Pubic Water Supply Section -- Asheville Regional Office • 2090US'Hlghway 70, Swannanoa, North Carolina 28778 Phone: 828-29645001 FAX: 828-299-70431 Internet: ncdrinkingwater.state.nc.us An Equal Opportunity l Affinna&vo Action Employer Date: One aurally Chernikov, Sergei From: Myers.Pamala@epamail.epa.gov Sent: Tuesday, September 27, 2011 9:51 AM To: Chernikov, Sergei Subject: Re: City of Lenoir (Gunpowder Creek WWTP) Hello Sergei, Thank you for your follow up. I will attach this note to the application and file it away. I have no further comments. Thank you again, Pamala Myers Environmental Engineer and Technical Advisor Pollution Control and Implementation Branch Water Protection Division Municipal and Industrial NPDES Section U.S. EPA, Region 4 Atlanta, GA 30303 404.562.9421 404.562.8692 (fax) From: "Chernikov, Sergei" <sergei.chernikovOncdenr.Rov> To: Pamala Myers/R4/USEPA/US@EPA Date: 09/27/2011 08:41 AM Subject: City of Lenoir (Gunpowder Creek WWTP) Pam, I received your voicemail regarding the above referenced facility. Below are my answers: 1) I have checked the application, and determined that it is complete with an exception of the column that specifies number of samples. They omitted 4 from this column. However, everything else is in place. 2) The permit is issued for 3 years because it has been on backlog for 2 years, it was reassigned to me recently. We try to keep our basinwide schedule and renew permits in the same basin within the same time period. Thank you! Sergei Sergei Chernikov, Ph.D. Environmental Engineer II Complex Permitting Unit Phone: 919-807-6393, fax 919-807-6495 1 1617 Mail Service Center Raleigh, NC 27699-1617 Express mail: 512 North Salisbury St. Raleigh, NC 27606 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. NORTH CAROLINA, CALDWELL COUNTY, AFFIDAVIT OF PUBLICATION Before the undersigned, a Notary Public of said County and State, duly commissioned, qualified, and authorized by law to administer oaths, personally appeared Terese Almquist who being first duly sworn, deposes and says: that she is Publisher of Lenoir Newspapers, Inc., engaged in the publication of a newspaper known as Lenoir News -Topic, published, issued, and entered as second class mail in the City of Lenoir, in said County and State; that she is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement, a true copy of which is attached hereto, was published in Lenoir News -Topic on the following dates: Sept. 21 and that the said newspaper in which such notice, paper, document, or legal advertisement was published was, at the time of each and every publication, a newspaper meeting all of the requirements and qualifications of Section 1-597 of the General Statutes of North Carolina and was a qualified newspaper within the meaning of Section 1- 597 of the General Statutes of North Carolina. This 21st day of September, 2011 Sworn to and subscribed before me, this 21st da}E166 Rtetb r arshburn Caidwe4 ,z My Commission expires r Public Notice North Carolina Environmental Management Commission/NPDES Unit 1617 Nail Service Center Raleigh, NC 27699-1617 Notice of Intent to Issue a NPDES Wastewater Permit The North Carolina Environmental Management Commission proposes to issue a NPDES wastewater discharge permit to the person(s) listed below. Written comments regarding the proposed permit will be accepted until 30 days after the publish date of this notice. The Director of the NC Division of Water Quality (DWQ) may hold a public hearing should there be a significant degree of public interest. Please mail comments and/or information requests to DWQ at the above address. Interested persons may visit the DWQ at 512 N. Salisbury Street, Raleigh, NC to review information on file. Additional information on NPDES permits and this notice may be found on our website: http://portal.ncdenr.org/web/wq/swp/ps/npdes/calendar, or by calling (919) 807-6304. The City of Lenoir requested renewal of permit NC0023736 for Gunpowder Creek WWTP in Caldwell County; this facility discharge is treated municipal wastewater to Gunpowder Creek, Catawba River Basin. NPDES/Aquifer Protection Permitting Unit Pretreatment Information Request Form PERMIT WRITER COMPLETES THIS PART: PERMIT WRITERS - AFTER you get this form Check ack from PER: -Notify all that apply PERCS CSTMP/STMP data we said should Date of Request 8/31/2011 municipal renewal X be on DMRs is not really there, so we can get it for Requestor Sergei Chemikov new industries you (or NOV POTW). Facility Name Gunpowder Creek WWTP expansion - Notify PERCS if you want us to keep a specific Permit Number NC0023736 Speculative limits POC in LTMP/STMP so you will have data for next renewal. ReRegion g ARO stream reclass. permit - Email PERCS draft permit, fact sheet, RPA. Basin Catawba stream relocation - Send PERCS paper copy of permit (w/o NPDES 7Q10 change boilerplate), cover letter, final fact sheet. Email RPA other if changes. other • check a plicable PERCS staff: Other Comments to PERCS: X BRD, CPF, CTB, FRB, TAR Sarah Morrison (807-6310) CHO, HIW, LTN, LUM, NEU, NEW, ROA, YAD Monti Hassan (807-6314) PERCS Status of PRETREATMENT STAFF COMPLETES THIS PART: Pretreatment Program (check all that apply) 1) facility has no SIU's, does have Division approved Pretreatment Program that is INACTIVE 2) facility has no SIU's, does not have Division approved Pretreatment Program X 3) facility has Sills and DWQ approved Pretreatment Program (list "DEV" if program still under development) X 3a) Full Program with LTMP 3b) Modified Program with STMP 4) additional conditions regarding Pretreatment attached or listed below STMP time frame: Most recent: Flow, MGD Permitted Actual Time period for Actual Next Cycle: Industrial 0.15* 0.2184 Oct 2004-Sept 2006 Uncontrollable n/a 0.7032 Oct 2004-Sept 2006 POC in LTMP/ STMP Parameter of Concern (POC) Check List POC due to NPDES/ Non- Disch Permit Limit Required by EPA* Required by 503 Sludge** POC due to SIU*** POTW POC (Explain below)**** STMP Effluent Freq LTMP Effluent Freq X BOD Limit X Q X TSS Limit X Q Q = Quarterly X NH3 Limit X Q M = Monthly X Arsenic X X Q 4 Cadmfum Limit 4 X X Q 4 Chromium 4 X Q .1 CoppeF _ Monitor 4 X X Q X Cyanide X Q all data on DMRs? ,i Lead :,: 4 X X Q YES X X Mercury X Q NO (attach data) X Molybdenum X Q 4 Nickel: ,% X X Q . X Silver Monitor X Q X Selenium Limit X Q f Zinc : Monitor J X X Q data in spreadsheet'? Total Nitrogen _ Q YES (email to writer) X Phosphorus Monitor Q NO X X TKN Q *Alwaysrrnthe LTMP/STMP . ** Only in LTMP/STMP if sludge land app or composte (dif POCs for incinerators) *** Only in LTMP/STMP while SIU still discharges to POTW **** Only in LTMP/STMP when pollutant is still of concern to POTW Comments to Permit Writer (ex.. explanation of any POCs; info you have on IU related investigations into NPDES problems): * Permitted industrial flow was 0.30 MGD at the time of actual industrial discharge of .2184 MGD. NPDES Pretreatment request farm Gunpowder WWTP Aug2011.x(sx Revised: July 24, 2007 NCDENR/DWQ FACT SHEET FOR NPDES PERMIT DEVELOPMENT City of Lenoir, Gunpowder Creek WWTP NC0023736 IIIIIIIIIIIMIIIIIIIIIIIIW Facility Information` (1.) Facility Name: Gunpowder Creek WWTP _ (2.) Permitted Flow (MGD): 1 2.0 (6.) County: Caldwell (3.) Facility Class: IV (7.) Regional Office: Asheville (4.) Pretreatment Program: 1 Full (8.) USGS Topo Quad: D13SW (5.) Permit Status: ! Renewal (9.) USGS Quad Name: Granite Falls jIIIIIIIIIIIIIIIIIIIIW Stream Characteristics (1.) Receiving Stream: i Gunpowder Creek (7.) Drainage Area (mi2): 12.9 (2.) Sub -basin: 03-08-32 (8.) Summer 7Q10 (cfs): 2.9 (3.) Stream Index Number: s 11-55-0.5 (9.) Winter 7Q10 (cfs): 4.0 (4.) Stream Classification: i WS-IV (10.) 30Q2 (cfs): 5.8 (5.) 303(d) Status: Not listed (11.) Average Flow (cfs): 17.4 (6.) 305(b) Status: ! (12.) IWC %: 52 1.0 Proposed Changes Incorporated into Permit Renewal • A monthly average and daily maximum limits for Hg have been added to the permit based on a statistical analysis of the effluent data. A monitoring frequency for Hg has been established as Monthly. The permittee may request a minor modification to change the monitoring frequency to Quarterly following 12 consecutive months with values below 12 ng/L. • A monthly average and daily maximum limits for CN have been added to the permit based on a statistical analysis of the effluent data. A monitoring frequency for CN has been established as Monthly. • A daily maximum limit for Se has been removed from the permit based on a statistical analysis of the effluent data. A monitoring frequency for Se has been reduced to Quarterly due to the removal of the limit. • A daily maximum limit for Cr has been removed from the permit based on a statistical analysis of the effluent data. A monitoring frequency for Cr has been reduced to Quarterly due to the removal of the limit. • A dailymaximum limit for Pb has been removed from the permit based on a statistical analysis of the effluent data. A monitoring frequency for Pb has been reduced to Quarterly due to the removal of the limit. • Monitoring frequencies for total Cu, total Zn, and total Ag were reduced to Quarterly based on the review of the effluent data. 2.0 Summary The city of Lenoir is requesting renewal of the Gunpowder Creek WWTP. The 2.0 MGD facility discharges into Gunpowder Creek, a class WS-IV waterbody. Gunpowder Creek is currently supporting its designated use. The facility has a full pretreatment program and is required to continue its implementation. NPDES Permit Fact Sheet - 09/02/ 11 City. of Lenoir, Gunpowder Creek WWTP Page 2 NC0023736 3.0 Compliance Summary WET Test Results The Gunpowder WWTP has a chronic toxicity requirement at 52%. The facility has consistently passed WET tests during the previous permit term with one exception (March 2009). The tests conducted during the two subsequent months passed. Correspondence File Review/Compliance History In 2010 and 2011 the facility had numerous limit violations. The following Notices of Violations were issued: 06/17/11- fecal coliforms; 04/01/11- ammonia, TSS; 02/14/11 - ammonia; 01/27/11- ammonia; 06/22/11- maintenance problems; 05/28/10 - failure to monitor. The facility has performed replacement of the SBR valves, and made other modifications to the treatment train to address these issues during 2011. Letter from the facility and report from the consultant are attached. Instream DMR. data review The Gunpowder Creek facility is required to perform instream monitoring. Monitoring parameters are pH, DO, fecal coliform, temperature, total nitrogen, total phosphorus, • conductivity. Review of the instream data indicates that the facility has no significant negative impact on the receiving stream. RPA Analysis RPAs were performed for the following parameters based on DMR data submitted as a requirement of the NPDES permit CN, Hg, Mo, Se, As, Cd, Cr, Cu, Pb, Ni, Ag, and Zn (please see attached. 4.0 Proposed Schedule for Permit Issuance Draft Permit to Public Notice: 09/14/2011 Permit Scheduled to Issue: 11/07/2011 5.0 State Contact Information If you have any questions on any of the above information or on the attached permit, please contact Sergei Chernikov at (919) 807-6393. Regional Office Comments: REASONABLE POTENTIAL ANALYSIS Gunpowder Creek WWTP NC0023736 Qw (MGD) 1Q10S (Cis) 7Q10S (cfs) 7Q10W (cfs) 3002 (cfs) 2.00 2.43 2.90 4.00 5.80 Avg. Stream Flow, QA (cfs) 17.40 Rec'ving Stream Gunpowder Creek WWTP Class N !WC (%) @ 1Q10S 56.09 @ 7Q10S 51.67 @ 7Q10W 43.66 ® 3002 34.83 @ QA 15.12 Stream Class WS-N Outfall 1 Qw = 2 MGD PARAMETER TYPE (1j STANDARDS & CRITERIA 42) PC, Units REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION NCWOS/Chronic )6FAV/Amt. n /Dvt flax Prod Qv ACorut*Qv Cyanide NC -- , . 5.00 N 22 10 u91L 11 8 Note: n<12 Limited data set 22.0 Acute: 39 __ _ __- - Chronic 10 --.-.- add limit --_-_-_-_-.-.-_-_----__ Mercury NC 12.00 2 ng/L 12 10 442.3 Acute: N/A _ _ -.-.-.--.-.----_-. Chronic: 23 add limit _-. - . - _.-.-. -- -. Molybdenum A 3500.00 ugll 12 4 176.3 Acute: N/A _ _ _ Chronic: _ _ _ 10,048 no limit Selenium NC 5.00 56 ug/L 26 0 1.0 Acute: 56 _ _ -- ---------- Chronic 10 remove the limit and reduce monitoring --- ---. ---------. -- Arsenic, AqL AqL 50.00 ug/L 13 0 10.0 Acute: N/A _Chronic: 97 no Limit r Arsenic, HH C 10.00 HH uglL 13 0 9.9500 Acute: N/A Chronic: 66 -- nOlimit -.---------.-_-.-_-_-. -� -- Cadmium . NC 2.00 15 ug/L 70 8 31.1 Acute: 27 Chronic: 4 keep the limit Chromium NC 50.00 1022 uglL 35 5 5.7 Acute: 1,822 _ Chronic: 97 remove the limit and reduce montb6ng Copper NC 7.00 AL 7.3 ug/L 45 2 71.4 Acute: 13 _ _ _ ------ ----- Chronic: 14 no limit - _- --- --.---.------ action level standard Load NC • 25.00 33.8 ug/L 25 0 7.3 Acute: 60 _ _ --Chronic ---.------- remove the ttmit and reduce monitoring --- ---------------- Nickel NC 88.00 261 ug/L 12 3 20.3 Acute: 465 _ _ _ ---------.-------•-•-_-•-•-•-_------ Chronic:170 no limit Acute: 465 23736-RPA-2010.xlsm, rpa 8/30/2011 Chronic: 97 Arsenic, HH C 10.00 HH ug/L 13 0 9.9500 Acute: N/A _ _ _ _ _ _ _n_o ^Chronic 66 limit_ _ _ _ Beryllium NC 6.50 ug/L 0 0 N/A Acute: N/A _-------------_ Chronic: 13 - - Cadmium NC 2.00 15 ug/L 70 6 31.1 Acute: 27 _ _ _ Chronic--- 4 -_ keep the limit -- NO - ----- OD Cadmium, Tr NC 0.40 15 ug/L 0 0 N/A Acute: 27 _---------_ Chronic: 1 _ _ _ - �_ Chromium NC 50.00 1022 ug/L 35 5 5.7 Acute: 1,822 _ _ Chronic:97----- remove the limit an reduce monitoring a Copper NC 7.00 AL 7.3 ug/L 45 2 71.4 Acute: 13 _---------_ Chronic: 14 no limit _-_ action level standarc Lead NC 25.00 33.8 ug/L 25 0 7.3 Acute: 60 - - - - - - - - - - ^• Chronic: 48 I remove the limit an( ---- - reduce monitoring E Nickel NC 88.00 261 ug/L 12 3 20.3 Acute: 465 _ _ _ _ _ _no Chronic:170 limit _` _ _ i Nickel, WS • NC 25.00 WS 261 ug/L 12 3 20.3 Acute: 465 ----------no Chronic: 48 limit --_ E Silver NC 0.06 AL 1.23 ug/L 33 2 3.5 Acute: 2 Chronic: 0.12 no limit action level standarc c Zinc NC 50.00 AL 67 ug/L 29 29 108.0 Acute: 119 _ _ _ _ _ _ Chronic:— 97-------- no limit action level standarc Gunpowder NC0023736 Qw (MGD) 2.00 I Q I OS (cfs) 2.43 7Q I OS (cfs) 2.90 7Q1OW (cfs) 4.00 30Q2 (cfs) 5.80 ream Flow, QA (cfs) 17.40 Reeving Stream Gunpowder Creek 1 2 3 4 5 6 7 8 reek WWTP WWTP Class IV /WC (%) @ I Q IOS 56.09 @ 7Q IOS 51.67 @ 7QIOW 43.66 @ 30Q2 34.83 @QA 15.12 Stream Class WS-IV Wail I w 2 MGD PARAMETER TYP E (1) STANDARDS & CRITERIA (2) UnitsREASONABLE POTENTIAL RESULTWOMMENDED ACTI NC WQS / /: FAV / n # Max Prod Allowable Cw Cyanide NC 5.00 N 22 ug/L 11 8 Note: n<12 Limited data I 22.0 set `_-_-_-_ Chronic: 10 add limit ----_ 1 Fluoride NC 1800.00 ug/L 0 0 N/A Acute: N/A `_ _ _ _ Chronic_ 3,484 _ _ _ _ _ _ _ _ _ Mercury NC 12.00 ng/L 12 10 442.3 Acute: N/A _ _ ______a_dd Chronic:23 _Iim_it_____ Molybdenum A 3500.00 ug/L 12 4 176.3 Acute: N/A _ _ _ Chronic__ _ _ 10,048 no limit _ _ _ _ _ _ _ Phenols A 1.00 N ug/L 0 0 N/A Acute: N/A Chronic: 3 _ _ Selenium NC 5.00 56 ug/L 26 0 1.0 Acute: 56 _ _ _ _ _ _r_e_mo_ve `Chronic_ 10 _th_e _limi_t an( reduce monitoring Toluene NC 11.00 ug/L 0 0 N/A Acute: N/A _ _ ________________ Chronic: 21 Arsenic, AqL AqL 50.00 ug/L 13 0 10.0 Acute: N/A no limit REASONABLE POTENTIAL ANALYSES Cyanide Date Data BDL=1/2DL Results 1 4/13/2010 10 10.0 Std Dev. 2.2361 2 1/20/2010 < 5 5.0 Mean 6.0000 3 1/22/2009 6 5.0 C.V. 0.3727 4 4/7/2009 5 5.0 n 11 5 10/5/2009 5 5.0 6 3/16/2008 < 5 5.0 Mult Factor = 2.0000 7 11/8/2008 5 5.0 Max. Value 11.0 ug/L 8 4/24/2007 11 11.0 Max. Pred Cw 22.0 ug/L 9 8/24/2007 9 5.0 10 11/25/2007 8 5.0 11 7/10/2007 6 5.0 12 13 14 15 16 17 18 19 20 21 22 lyV 23 24 25 26 27 ?' 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 199 200 - 1 - 23736-RPA-2010.xlsm, data 8/30/2011 REASONA: LE POTENTIAL ANALYSIS Mercury Molybdenum Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results 1 4/13/2010 < 1 1.0 Std Dev. 10.9728 1 4/13/2010 < 5 2.5 Std Dev. 12.1645 2 1/20/2010 1.6 1.0 Mean 5.2100 2 1/20/2010 < 5 2.5 Mean 10.5417 3 1/22/2010 2.7 2.7 C.V. 2.1061 3 1/22/2009 32 32.0 C.V. 1.1539 4 4/7/2009 6.9 6.9 n 12 4 4/7/2009 < 5 2.5 n 12 5 7/22/2009 1.2 1.0 5 7/21/2009 31 31.0 6 10/8/2009 3.42 3.4 MuIt Factor = 11.1700 6 10/5/2009 < 1 0.5 Mull Factor = 5.5100 7 5/15/2008 2.9 2.9 Max. Value 39.6 ng/L 7 6/17/2008 18 18.0 Max. Value 32.0 ug/L 8 11/8/2008 < 1 1.0 Max. Pred Cw 442.3 ng/L 8 3/19/2008 < 2 1.0 Max. Pred Cw 176.3 ug/L 9 3/13/2007 1.9 1.00 9 3/16/2008 24 24.0 10 8/24/2007 1.6 1.00 10 4/24/2007 < 10 5.0 11 6/20/2007 1.7 1.00 11 7/10/2007 < 10 5.0 12 12/10/2007 39.6 39.60 12 12/4/2007 < 5 2.5 13 13 14 14 15 15 16 16 17 17 18 18 19 19 y 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 :4 29 V 30 31 31 32 32 1�' 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50 51 :' : i 51 52 52 53 53 54 , 54:;, 55 55 tia; 56 56 57 57 58 58 xx 59 3 59 ?S. 60 60 '-' 199 199 200 200 -2- 23736-RPA-2010.xlsm, data 8/30/2011 REASONABLE POTENTIAL ANALYSIS Selenium Arsenic, AqL Date Data BDL=1/2DL Results Date Data BDL=II2DL Results 1 Sep-2009 < 2 1.0 Std Dev. 0.0000 1 < 5 2.5 Std Dev. 1.4806 2 Sep-2009 < 2 1.0 Mean 1.0000 2 < 5 2.5 Mean 3.7308 3 Oct-2009 < 2 1.0 C.V. 0.0000 3 < 5 2.5 C.V. 0.3969 4 Oct-2009 < 2 1.0 n 26 4 < 10 5.0 n 13 5 Oct-2009 < 2 1.0 5 < 5 2.5 6 Oct-2009 < 2 1.0 Mult Factor = 1.0000 6 < 10 5.0 Mull Factor = 1.9900 7 Oct-2009 < 2 1.0 Max. Value 1.0 ug/L 7 < 2 1.0 Max. Value 5.0 ug/L 8 Nov-2009 , < 2 1.0 Max. Pred Cw 1.0 ug/L 8 < 10 5.0 Max. Pred Cw 10.0 ug/L 9 Nov-2009 < 2 1.000 9 < 10.0 5.0 10 Nov-2009 < 2 1.000 10 < 10.0 5.0 11 Nov-2009 < 2 1.000 11 < 5.0 2.5 12 Dec-2009 < 2 1.000 12 < 10.0 5.0 13 Dec-2009 < 2 1.000 13 < 10.0 5.0 14 Dec-2009 < 2 1.0 14 15 Dec-2009 < 2 1.0 15 16 Dec-2009 < 2 1.0 16 17 Jan-2010 . < 2 1.0 17 18 Jan-2010 ..< 2 1.0 18 19 Jan-2010 < 2 1.0 19 20 Jan-2010 ..< 2 1.0 20 21 Feb-2010 <. 2 1.0 21 22 Feb-2010 < 2 1.0 22 23 Feb-2010 < 2 1.0 23 24 Feb-2010 , < 2 1.0 24 25 Mar-2010 , < 2 1.0 25 26 Mar-2010 :<: 2 1.0 26 27 27 28 28 219 29 30 30 31 31 32 32 33 33 34 34 35 35 36 ''s 36 37 37 38 ww+.:i 38 39 39 40 40 41 '::T 41 42 42 43 .; 43 44 %;:: 44 45 46 45 46 47 47 48 48 49 49 50 `: 50 51 51 52 , 52 53 53 54 54 55 :, 55 56 56 57 57 58 °' 58 59 ' 59 60 w 60 199 199 200 200 - 3 - 23736-RPA-2010.xlsm, data 8/30/2011 r:, E SONA LE POTENTIAL ANALYSIS Arsenic, HH Cadmium Date Data BDL=1/2DL Results Date Data BDL=112DL Results 1 Apr-2004 < 5 2.5 Std Dev. 1.4806 1 Jan-2009 <' 0.20 0.1 Std Dev. 1.5382 2 Jul-2007 < 5 2.5 Mean 3.7308 2 Jan-2009 < 0.20 0.1 Mean 0.4900 3 Aug-2007 < 5 2.5 C.V. 0.3969 3 Jan-2009 < 0.20 0.1 C.V. 3.1392 4 Dec-2007 < 10 5.0 n 13 4 Jan-2009 < 0.20 0.1 n 70 5 Dec-2007 <- 5 2.5 5 Jan-2009 6.00 6.0 6 Mar-2008 < 10 5.0 Mult Factor = 1.99 6 Feb-2009 6.00 6.0 Mult Factor = 3.4600 7 Mar-2008 < 2 1.0 Max. Value 5.0 ug/L 7 Feb-2009 1.00 1.0 Max. Value 9.0 ug/L 8 Nov-2008 < 10 5.0 Max. Pred Cw 10.0 ug/L 8 Feb-2009 < 0.20 0.1 Max. Pred Cw 31.1 ug/L 9 Jan-2009 < 10.0 5.0 9 Feb-2009 <• 0.20 0.1 10 Apr-2009 < -10.0 5.0 10 Mar-2009 < 0.20 0.1 11 Jan-2010 < 5.0 2.5 11 Mar-2009 <: 0.20 0.1 12 Apr-2010 < 10.0 5.0 12 Mar-2009 <- 0.20 0.1 13 Oct-2010 <. 10.0 5.0 13 Mar-2009 <' 0.20 0.1 14 • 14 Mar-2009 < 0.20 0.1 15 15 Apr-2009 <. 0.20 0.1 16 16 Apr-2009 < 0.20 0.1 17 17 Apr-2009 < 0.20 0.1 18 18 Apr-2009 c 0.20 0.1 19 19 May-2009 <. 0.20 0.1 20 20 May-2009 < 0.20 0.1 21 21 May-2009 .<. 0.1 22 22 May-2009 <' 0.20 0.1 23 23 Jun-2009 9.00 9.0 24 24 Jun-2009 5.00 5.0 25 25 Jun-2009 . <: 0.20 0.1 26 26 Jun-2009 < 0.20 0.1 27 27 Jun-2009 <- 0.20 0.1 28 28 Jul-2009 •< 0.20 0.1 29 29 Jul-2009 < 0.20 0.1 30 30 Jul-2009 < 0.20 0.1 31 r€ . 31 Jul-2009 , < 0.20 0.1 32 tw,1 32 Aug-2009 < 0.20 0.1 33 33 Aug-2009 <:. 0.20 0.1 34 34 Aug-2009 < 0.20 0.1 35 35 Aug-2009 < 0.20 0.1 36 36 Sep-2009 < 0.20 0.1 37 37 Sep-2009 < 0.20 0.1 38 ` 38 Sep-2009 < 0.20 0.1 39 39 Sep-2009 < 0.20 0.1 40 40 Oct-2009 < 0.20 0.1 41 41 Oct-2009 < 0.20 0.1 42 „ .+ 42 Oct-2009 : < • 0.20 0.1 43 43 Oct-2009 5: 0.20 0.1 44 `, 44 Oct-2009 ':.< 0.20 0.1 45 45 Nov-2009 < 0.20 0.1 46 46 Nov-2009 ' <" 0.20 0.1 47 47 Nov-2009 : <I 0.20 0.1 48 48 Nov-2009 : < 0.20 0.1 49 49 Dec-2009 < 0.20 0.1 50 50 Dec-2009 <:: 0.20 0.1 51 51 Dec-2009 < 0.20 0.1 52 52 Dec-2009 .<: 0.20 0.1 53 53 Dec-2009 .<, 0.20 0.1 54 54 Jan-2010 <. 0.20 0.1 55 55 Jan-2010 < 0.20 0.1 56 56 Jan-2010 < 0.20 0.1 57 57 Jan-2010 0.20 0.2 58 58 Feb-2010 < 0.20 0.1 59 59 Feb-2010 < 0.20 0.1 60 60 Feb-2010 < 0.20 0.1 199 199 . 200 200 -4- 23736-RPA-2010.xlsm, data 8/30/2011 REASONABLE POTENTIAL ANALYSIS Chromium Copper Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results 1 Apr-2010 1 1.0 Std Dev. 0.5936 1 Jul-2008 19 9.5 Std Dev. 6.6234 2 Jan-2010 < 1 0.5 Mean 0.7371 2 Jul-2008 76 38.0 Mean 9.7889 3 Aug-2007 < 3 1.5 C.V. 0.8053 3 Aug-2008 18 9.0 C.V. 0.6766 4 Aug-2007 < 3 1.5 n 35 4 Aug-2008 36 18.0 n 45 5 Aug-2007 < 1 0.5 5 Sep-2008 14 7.0 6 Aug-2007 <. 1 0.5 Mult Factor = 2.2800 6 Sep-2008 18 9.0 Mult Factor = 1.8800 7 Jan-2009 1 1.0 Max. Value 2.5 ug/L 7 Oct-2008 17 8.5 Max. Value 38.0 ug/L 8 Apr-2009 2 2.0 Max. Pred Cw 5.7 ug/L 8 Oct-2008 36 18.0 Max. Pred Cw 71.4 ug/L 9 Jul-2009 <• 1 0.5 9 Nov-2008 .. 13 6.5 10 Oct-2009 < 1 0.5 10 Nov-2008 > 19 9.5 11 Mar-2008 1 1.0 11 Dec-2008 18 9.0 12 Mar-2008 < 1 0.5 12 Dec-2008 15 7.5 13 Nov-2008 1 1 1.0 13 Jan-2009 16 8.0 14 Apr-2007 .<, 2 1.0 14 Jan-2009 24 12.0 15 Apr-2007 < 1 0.5 15 Feb-2009 18 9.0 16 Mar-2007 < 2 1.0 16 Feb-2009 20 10.0 17 Mar-2007 < 2 1.0 17 Mar-2009 > 13 6.5 18 May-2007 .<, 2 1.0 18 Mar-2009 28 14.0 19 Aug-2007 <• 2 1.0 19 Apr-2009 25 12.5 20 Aug-2007 - <' 1 0.5 20 Apr-2009 21 10.5 21 Aug-2007 < 1 0.5 21 May-2009 20 10.0 22 Aug-2007 , <. 3 1.5 22 May-2009 16 8.0 23 Aug-2007 '< 3 1.5 23 Jun-2009 5 2.5 24 Nov-2007 ' < 5 2.5 24 Jun-2009 <• 1 0.5 25 25 Jul-2009 14 7.0 26 26 Jul-2009 16 8.0 27 27 Aug-2009 • 9 4.5 28 28 Aug-2009 13 6.5 29 29 Sep-2009 f .. , 12 6.0 30 30 Sep-2009 ; 32 16.0 31 31 Oct-2009 8 4.0 32 32 Oct-2009 12 6.0 33 33 Nov-2009 28 14.0 34 34 Nov-2009 11 5.5 35 35 Dec-2009 5 2.5 36 36 Dec-2009 17 8.5 37 37 Jan-2010 - 12 6.0 38 • 38 Jan-2010 10 5.0 39 39 Feb-2010 11 5.5 40 40 Feb-2010 '. 12 6.0 41 41 Mar-2010 59 29.5 42 42 Mar-2010 28 14.0 43 43 Mar-2010 10 5.0 44 44 Apr-2010 ' 16 16.0 45 45 Apr-2010 12 12.0 46 46 47 47 48 48 49 49 50 50 51 51 52 52 53 53 54 54 55 55 56 56 57 57 58 58 59 59 60 60 199 199 200 200 -5- 23736-RPA-2010.xlsm, data 8/30/2011 REASONABLE POTENTIAL ANALYSIS Lead 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 • 16 17 18 19 20 21 22 23 24 25 26 27 28 29 ao 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 199 200 Date Data BDL=1/2DL Results 1/22/2009 < 5 2.5 Std Dev. 0.6874 4/7/2009 < 2 1.0 Mean 2.4200 7/21/2009 < 10 5.0 C.V. 0.2840 10/5/2009 < 5 2.5 n 25 3/19/2008 < 5 2.5 8/26/2008 < 5 2.5 Mult Factor = 1.4800 3/16/2008 < 3 1.5 Max. Value 5.0 ug/L 11/8/2008 < 5 2.5 Max. Pred Cw 7.3 ug/L 4/24/2007 < 3 1.5 4/11/2007 < 3 1.5 4/5/2007 < 5 2.5 3/27/2007 < 5 2.5 3/19/2007 < 5 2.5 3/13/2007 < 5 2.5 3/6/2007 < 5 2.5 5/29/2007 < 5 2.5 5/22/2007 < 5 2.5 5/15/2007 < 5 2.5 5/8/2007 < 5 2.5 5/1/2007 < 5 2.5 8/28/2007 < 5 2.5 8/24/2007 < 5 2.5 8/14/2007 < 5 2.5 8/7/2007 < 5 2.5 8/1/2007 < 5 2.5 -6- 23736-RPA-2010.xtsm, data 8/30/2011 City of Lenoir Public. Utilities Department Gunpowder Creek VVVVTP P.O. Box 958 Lenoir, North Carolina 28645 August 19, 2011 Roger Edwards Regional Supervisor NC DENR / DWQ / Surface Water Protection 2090'US Highway 70 Swannanoa, NC 28778 Subject: Notice of Violation ,/ City of Lenoir, Gunpowder Creek WWTP, NPDES Permit # NC0023736; NOV-2011-LV-0328. Dear Mr. Edwards: This letter is in response to the Notice of Violation letter dated August 4, 2011. The Gunpowder Creek WWTP (NPDES Permit # NC0023736) was cited for permit violations for BOD, Fecal Coliform, Selenium and TSS. Our response to these violations follows (some of which is reiterated and/or expounded upon from the January 2011 DMR "corrective action" page): • The BOD monthly average was 31.7 mg/I (permit limit of 30 mq/I). The SBR influent fill valves for # 3 and # 4 were replaced in February 2011. The new valves are not permitting any entry of influent into the SBRs, unless they are in the "mix -fill" or "react -fill" mode. Prior to that replacement, the old valves allowed influent to periodically enter the tanks, even during the quiescent settle stage, causing the effluent to be cloudy. • The TSS monthly average was 41.0 mg/1 (permit limit of 30 mg/I); the weekly average of TSS . during January 9-15, 2011 was 56.2 mg/1 (permit limit of 45 mg/I). The mixing of the influent in the settle stage directly contributed to these violations. The cause was the leaky influent valves, previously described above. • The Fecal Coliform monthly geometric mean was 493 counts/100mI (permit limit of 200 counts/100m1); Fecal Coliform weekly geometric mean during January 2- 8, 2011 was 763 counts/100m1 (permit limit of 400 counts/100m1); Fecal Coliform weekly geometric mean during January 23-29, 2011 was 1,361 counts/100m1 (permit limit of 400 counts/100mI). Calcium hypochiorite tabs being used during the month would not dissolve properly in our feed system, causing inefficient disinfection. Although the supplier (Harcros Chemicals, Thomasville, NC) would not directly admit that.the tabs had been exposed to moisture, it was evident that they were definitely a gray color (normally white) and they were extremely hard to break, even with a hammer. Harcros eventually replaced the hypochiorite tabs (PPG Accutabs, with scale inhibitor). Until we got the new load, we place the tablets in the flow equalization pond at locations of greatest turbulence (at the pipes where the tanks decant). We have not had any problems with the tabs since January. The plant effluent Selenium was 22 pg/I on January 4, 2011 (daily maximum permit limit of 9.7 mg/I). This was the only violation over the past two (2) years. No industry has been found to be a contributor, and very lithe or no Selenium has been detected in the plant influent. We use Tritest Labs, in Clemmons, to perform the Selenium analyses (graphite furnace AA). We also had Blue Ridge Labs report a value for that day (they use multi -parameter ICP method), and they obtained a value of "<10 pg/I". During the week of August 7-13, the maintenance staff began to repair leaking airlines between the blowers and the diffuser feed lines into SBR # 2 and # 4. There has been excessive air leakage in these lines for some time, and the repair had been deemed very difficult, as some of the joints were covered in concrete. However, the staff dug up the underground lines, put sealant in the joints, and replaced the old bolts. The dissolved oxygen levels in SBR # 2 increased dramatically. On August 18, the maintenance and operator staff began removing the diffusers in the offline SBR # 4. They are in the process of cleaning them, and the diffuser membranes have been ordered and will be replaced, when they are received from the supplier. Enclosed are photos of the work being done. If you have any questions, please call Monte Wall, Superintendent of Wastewater Treatment at 828-757-2198, or me at 828-757-2219. Sincerely, Radford L. Thomas Director of Public Utilities City of Lenoir NPDES/Aquifer Protection Permitting Unit Pretreatment Information Request Form COMPLETES THIS PART: PERMIT WRITERS - AFTER vou get this form PERMIT WRITER back from PERCS: Check all that apply - Notify PERCS if LTMP/STMP data we said should Date of Request 14149.009 municipal renewal V be on DMRs is not really there, so we can get it for Requestor Gr"�bh new industries you (or NOV POTW). Facility Name (s.Yloftr 6tAktpovarANWTP expansion - Notify PERCS if you want us to keep a specific Permit Number riCo0 a 3 7 1 G Speculative limits POC in LTMP/STMP so you will have data for next Region A-rzo stream reclass. permit renewal. -Email PERCS draft permit, fact sheet, RPA. Basin (' � ,�,�.�'i stream relocation - Send PERCS paper copy of permit (w/o NPDES 7Q10 change boilerplate), cover letter, final fact sheet. Email RPA other if changes. other check a plicable PERCS staff: Other Comments to PERCS: %, CTB, CHO, LUM, NEW, ROA - Dana Folley (523) HIW, LTN, NEU, YAD - Monti Hassan (371) BRD, CPF, FRB, TAR - Sarah Morrison (208) PERCS Status of PRETREATMENT STAFF COMPLETES THIS PART: Pretreatment Program (check all that apply) 1) facility has no SIU's, does have Division approved Pretreatment Program that is INACTIVE 2) facility has no SIU's, does not have Division approved Pretreatment Program V 3) facility has SIUs and DWQ approved Pretreatment Program (list "DEV" if program still under development) ✓ 3a) Full Program with LTMP 3 3b) Modified Program with STMP 4 4) additional conditions regarding Pretreatment attached or listed below f P ' - fr- e: - Flow, MGD Permitted Actual Time period for Actual ► ?Ip. . / Industrial O.2 00 6, 215fh T 19:- Uncontrollable n/a O.403a2 II t; tri' POC in LTMP/ STMP Parameter of Concem (POC) Check List POC due to NPDES/ Non- Disch Permit Limit Required by EPA* Required by 603 Sludge** POC due to SIU*** POTW POC (Explain below)**** STMP Effluent Freq LTMP Effluent req SA -' 140 C--� A - V BOD V V 4 Q M -� ctn— fig V TSS ✓ ✓ 4 Q M Q = Quarterly NH3 ✓ V 4 Q M M = Monthly • • Arsenic ✓ ,/ 4 Q M 4 Cadmium - V 4 v ✓ 4 Q M 4 Chromium " 4 V 4 Q M 4 Copper 4 v ✓ 4 Q M C Cyanide • t/ 4 Q M all data on DMRs? 4 Lead : 4 v ✓ 4 1 Q M YES v v Mercury v 4 i Q M NO (attach data) V Molybdenum v 4 i Q M 4 Nickel °: 4 v V 4 '; Q M V Silver V 4 V, Q M V Selenium V V v 4 i Q M 4 Zinc 4 ✓ V 4 Q M data in spreadsheet? Nf ea-1KV1 4 ' Q M Y S (email to writer) ✓ Phosphorus ` 4 t M NO 4 Q M 4 Q M 6tAtcrrato Gee; 4 Q M !rOci-,9n/06--rig 4 Q M .P.Are*X i11 if *Always In the LTMP/STMP ; ** Only in LTMP/STMP if sludge land app or composte (dif POCs for incinerators *** Only in LTMP/STMP while SIU still discharges to POTW **** Only in LTMP/STMP when pollutant is still of concem to POTW Comments to Permit Writer (ex.. explanation of any POCs: info vou have on IU related investigations into NPDES problems). , O zf, A t EQ t- ool 1 414)4. - o .15 --C.4# OooS Ih 4 • &C S 1 3 o 64 IP%J ✓ ~N - 0607 - Ir+ry v) . - � 7 NPDES_Pretreetmentrequestiormieb2008 Revised: July 24, 2007 Michael F. Easley Govemor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality November 12, 2002 MR. LEE KEARSON PRETREATMENT SUPERVISOR CITY OF MORGANTON PO BOX 3448 MORGANTON, NC 28680-3448 Subject: Pretreatment Unit Review of Industrial User Pretreatment Permit City of Morganton (NPDES # 0026573) Burke Count Dear Mr. Kearson: The Pretreatment .Unit of the P ivision of Water Quality has -'eviewed the Industrial User Pretreatment permit (IUP) submi . ed by the City of Morga on for. the following Significant Industrial User (SIU). The IUP w. '• received by the Divis. on April .29, 2002, with additional information received on November 1 2002. IUP, # SIU Name 4002 Viscotec Automotive Produ , IpLC The Pretreatment Unit review of the IUP IUPs, Allocation Table, and other sup Division's files and that key informa they are maintained for public recor Federal and State pretreatment effectively control and docu Industrial Users to the P meeting applicable cate or other adverse impa solids. Pretreatme pretreatment pro Thank you f questions dana.foll co sist rting on is entere d of a basic review of the IUP to assure that the cuments, have been properly placed in the and updated in the state's database where egulations require that the ent the discharge of wastewa Effective control of Indus rical pretreatment standards, prevent s to the POTW or its workers, and to prom permits shall be modified as necessary to assur am are consistently met. ocal delegated pretreatment program r from Significant and Categorical 'al Users by a POTW includes of pass -through, interference, e the beneficial re -use of bio that these objectives of the r your continued cooperation with the pretreatment progra comments, please contact Dana Rees Folley at (919) 733-508 @ncmail.net] or Tom S. Poe (ext. 522), Supervisor of the Pretreatme f/morgantoniup.017.vis cc: Central Files DRF, Pretreatment Unit Jim Reid, Asheville Regional Office NC—DENR, DWQ, PRETREATMENT UNIT 1617 MAIL SERVICE CENTER, RALEIGII, NC 27699-1617 Website: http://h2o.enr.state.nc.us/Pretreat/index.html Sincerely, S K.a Alan W. Klimek, P.E. If you have any (ext. 523) [email: t Unit. Telephone: 919-733-5083 Fax: 919-715-2941 \SA An Equal Opportunity Affirmative Action Employer NCDENR 50% recycled/10% post -consumer paper City of Lenoir Public Utilities Department Gunpowder Creek WWTP P.O. Box 958 Lenoir, North Carolina 28645 Tom Belnick Supervisor, Western NPDES Program AUG 1 4 2009 Division of Water Quality, NPDES Unit 1617 Mail Service Center WATER OUAUTY Raleigh, NC 27699-1617 DER POINT SOURCE BRANCH Subject: Permit Renewal Request for the City of Lenoir — Gunpowder Creek WWTP (Permit # NC0023736) and Sludge Management Plan for the Facility Dear Mr. Belnick: August 11, 2009 RECEIVED The City of Lenoir would like to request renewal of the NPDES wastewater discharge permit for the Gunpowder Creek WWTP (Permit # NC0023736). The current permit expires on January 31, 2010. There have been no major changes at the facility since issuance of the last permit (effective date January 31, 2005). In the application, only the last year's toxicity testing is included. The prior year's regular quarterly ceriodaphnia chronic testing (52%) can be sent also, if required. Below is a tabular summary of the last four and one-half years' monitoring: DATE TEST RESULT DATE TEST RESULT 03/17/2005 Ceriodaphnia, 52% PASS 03/13/2008 Ceriodaphnia, 52% PASS 06/16/2005 Ceriodaphnia, 52% PASS 06/12/2008 Ceriodaphnia, 52% PASS 09/22/2005 Ceriodaphnia, 52% PASS 09/18/2008 Ceriodaphnia, 52% PASS 12/15/2005 Ceriodaphnia, 52% PASS 12/11/2008 Ceriodaphnia, 52% PASS 03/16/2006 Ceriodaphnia, 52% PASS 03/16/2009 Ceriodaphnia, 52% FAIL 06/15/2006 Ceriodaphnia, 52% PASS 04/16/2009 Ceriodaphnia, phase II >100% ChV 09/14/2006 Ceriodaphnia, 52% PASS 05/18/2009 Ceriodaphnia, phase II 86.6% ChV 12/14/2006 Ceriodaphnia, 52% PASS 06/16/2009 Ceriodaphnia, 52% PASS 03/30/2007 Ceriodaphnia, 52% PASS (retest) 02/17/2009 Fathead minnow >100% ChV 06/14/2007 Ceriodaphnia, 52% PASS 03/17/2009 Fathead minnow >100% ChV 09/13/2007 Ceriodaphnia, 52% PASS 06/16/2009 Fathead minnow >100% ChV 12/13/2007 Ceriodaphnia, 52% PASS 07/21/2009 Fathead minnow >100% ChV Please note that the results for 17 of the 18 quarterly monitoring for ceriodaphnia dubia were "PASS". The only failure was in March 2009, with favorable results showing in the two phase II tests conducted in April and May 2009. Sludge generated at the facility is wasted to the aerobic digester, which under normal operation has diffused air provided. The digester air blower is turned off when supernating is required. When the digester reaches a high level, again the air is turned off and the sludge is pumped to a tanker truck for hauling to the Lower Creek WWTP Biosolids Facility. This sludge is discharged into the sludge -pumping pit within the plant, and is pumped into the sludge holding tank, where it is co -mingled with Lower Creek WVVTP sludge and Lenoir Water Plant alum sludge. The Lower Creek VVVVTP Biosolids Facility is a "Class A" sludge treatment facility, which currently utilizes lime stabilization and pasteurization processes. Sludge from the holding tank is pumped onto a belt press at approximately 2% solids content. The press discharge is about an 18% solids cake. This sludge cake is augured into a thermoblender, where quicklime is fed and heat is applied. After this heating and mixing step, the product drops into the pasteurization vessel, where it is heated to at least 158°F for thirty minutes. The final product, called "Lenoir Blend" is conveyed to a dump truck, which dumps the biosolids onto a covered storage pad. Lenoir Blend is given to local farmers or is spread directly onto their fields by city personnel and city spreader truck. Sludge analysis on this final product is generally conducted four times per year, and includes nutrients, metals and fecal coliform bacteria. If you require any other information, please call me at 828-757-2198. Thank you for your assistance. Also, thank you for allowing a little extra time to complete the enclosed application. Sincerely, Monte L. Wall Superintendent Wastewater Treatment City of Lenoir GUNPOWDER CREEK WWTP DIAGRAM Influent Grit Removal SB Step Aeratio ll To Gunpowder Creek Bar Screen Supernatant Sludge Holding Waste Sludge (only one tank shown) Chlorine SO2 Disinfect Dechlorination Equaliratio tiro Sludge to Disposal (Trucked to Lower Creek WWTP) SBR #1 & #2 Decant cmpoweier 4411401742 24" EFFLUENT I SLUDGE WASTE UNE T REMOVAL FACIUTY LIMP STATION NFLUENT FLOW METER POST EQUAUZATION BASIN PUMP STATION and VALVE VAULT CHLORINE CONTACT BASIN SULFUR DIOXIDE MIXING CHAMBER Ill STEP AERATION REFRIGERATEC