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Home My WebLink AboutNC0043176_Inspection_20160329Water Resources ENVIRONMENTAL QUALITY March 29, 2016 Ronald D Autry City of Dunn .•. PO Box 1065 Dunn; NC 28335 SUBJECT: 3/16/2016 Compliance Evaluation Inspection City of Dunn Dunn WWTP Permit•No: NC0043176 Harnett County Dear Mr.'Autry: PAT MCCRORY Governor DONALD R. VAN DER VAART Secretary S. JAY ZIMMERMAN Director Enclosed please find a copy of the Compliance Evaluation Inspection form from the inspection conducted. on 3/16/2016. The Compliance Evaluation Inspection was conducted by Mark Brantley, Environmental Program Consultant, of the Fayetteville Regional Office. The cooperation of Mrs. Donrie Dukes, Grade IV ORC, was greatly appreciated. The facility was found to be in Compliance with permit NC0043176. As a reminder, preservation_ of the Waters\'of the State can only be achieved through consistent NPDES Permit compliance. Comments • Facility was clean and neat in appearance atthe time of the inspection. • Maintenance records, ORC log, and operators log were up to date. The aeration basin has a significant number of air leaks in the air distributionsystem.' Facility staff stated that when an air leak was repaired a new leak would be created at the next weakest spot in the air line. Having a significantamount of air leaks in the system reduces the amount of air that is delivered to the, aeration basin which in turn reduces the efficiency of this treatment unit. Reduced treatment efficiency can result in a NPDES permit limit violations such as (but not limited to) Ammonia and BOD.: Please remember NPDES permit violations can result in. Notices of Violation and/or Chill Penalty assessments with,fines up to $25,000 per day per violation. Significant air Teaks can also increase power operating costs because the blower units will have to work harder to supply the required air to the aeration basins. By having -the blower units working harder this will increase wear and tear on these units which could cause major repairs,to these units. Please consultthe town's engineering firm to determine the life - expectancy of the air distribution system since these units were constructed in 1979 and have had no major repairs or upgrades. The Division of Water Resources strongly encourages the City of Dunn to begin studying ways to repair or replace the air distribution system. By studying the system the City would be able to determine how to fund a replacement/repair project and Fayetteville Regional, Office 225 Green Street, Suite 714, Fayetteville, North Carolina 28301-5095 Main Phone: 910-433-3300 1 Internet: http://www.ncdenr.gov An Equal Opportunity\AtfirmativeAction Employer —Made iri part by Recycled Paper Mr. Autry Page 2 March 29, 2016 also select the best technology to replace the existing air distribution system. Please note increased flow also increases the demand for air in the aeration basin. t • The Division of Water Resources recognizes that the cityhas done a lot of work on the City's Inflow and Infiltration (1/1) problem. However, a records review revealed flow violations for the months of January, March, November 2015 and January 2106. These violations were caused by wet weather periods which indicates more work needs to be done to correct the City's I/I problem. o The November 2015 eDMR was compared to the monthly laboratory bench sheets and no transcription errors were found. / Please refer to the enclosed inspection report for additional observations and comments. If you or your. staff have any questions, please call me at.910-433-3327. Sincerely, Ai,nX Mark Brantley Environmental Program Consultant Division of Water Resources Water Quality Regional Operations Section cc: Donrie Eldridge Dukes, ORC Central Files Fayetteville -Files . United States Environmental Protection Agency EPA Washington, D.C.20460 Water. Qompliance.lnsppction, Report., - . Form Approved. OMB No.2040-0057 . Approval expires 8-31-98 - - Section A: National Data System Coding'(i.e.;'PCS) - . Transaction Code NPDES yr/mo/day • Inspection 1 IN I 2 I5 j 3 NC0043176 111 12 •, 16/03/16 17 Type 18 I. I III Inspector Fac Type 19. Lsj• .2011 21I I I I I I I I I I I (I [ I I I I I I (I. I .III I. I. I( I I ((I II .166 Inspection Work Days ( Facility Self -Monitoring Evaluation Rating B1 QA 67 I I • • 70L .. 71. IN. 1: 72 I N I Reserved �. 731 I 174 79 I. 1 1 1l 80 1-1 1 ,Section B: FabilityData' Name and.Location of Facility Inspected (For Industriall Users discharging to POTW; also include POTW name and NPDES permit Number) . . . - Dunn WWTP Susan Tart Rd .. Dunn NC 28335 Entry,Time/Date. 09:30AM 16/03J16 .' Permit Effective Date 12/08/01 Exit Time/Date , - •12:30PM ,: 16/03/16 .. • . -.. . Permit Expiration Date. - ., ., .. . . . •• -16/09/30 . Name(s) of Onsite Representative(s)1Titles(s)/Phone and Fax Number(s) /// ponrie Eldridge Dukes/ORC/910-892-8T62/ ; Other Facility Data • Name, Address of Responsible OfficiaUTitle/Phone and Fax Number Ronald D Autry,PO Box 1065 Dunn NC 28335//910-892-2633/-. ':. ' Contacted --... No • Section C'. Areas Evaluated'During Inspection (Check:only'those areas evaluated) . Permit Flow Measurement . Operations & Maintenance Records/Reports , Self -Monitoring Program . Sludge Handling Disposal, ' -Facility Site Review . - Laboratory' .. • Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) '(See attachment summary) .. . . Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers . Date Mark Brantley FRO WQ//910-433-3300 Ext.727/ "114 D3--)9-/1,. Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date �B�lirJ�da;S . enson RO WQ//910-433-3300 Ext.72E 3 .:2 _! ty rl it3�t�c.Y .t4(: G��YD�� EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# 1 NPDES yr/mo/day Inspection Type NC0043176 111 121 16/03/16 117 18 C I (Cont.) 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Comments •Facility was clean and neat in appearance at the time of the inspection. •Maintenance records, ORC log, and operators log were up to date. •The aeration basin has a significant number of air Teaks in the air distribution system. Facility staff stated that when an air leak was repaired a new leak would be created at the next weakest spot in the air line. Having a significant amount of air leaks in the system reduces the amount of air that is delivered to the aeration basin which in turn reduces the efficiency of this treatment unit. Reduced treatment efficiency can result in a NPDES permit limit violations such as (but not limited to) Ammonia .and BOD. Please remember NPDES permit violations can result in Notices of Violation and/or Civil Penalty assessments with fines up to $25,000 per day per violation. Significant air leaks can also increase power operating costs because the blower units will have to work harder to supply the required air to the aeration basins. By having the blower units working harder this will increase wear and tear on these units which could cause major repairs to these units. Please consult the town's engineering firm to determine the life expectancy of the air distribution system since these units were constructed in 1979 and have had no major repairs or upgrades. The Division of Water Resources strongly encourages the City of Dunn to begin studying ways to repair or replace the air distribution system. By studying the system the City would be able to determine how to fund a replacement/repair project and also select the best technology to replace the existing air distribution system. Please note increased flow also increases the demand for air in the aeration basin. •The Division of Water Resources recognizes that the city has done a lot of work on the City's Inflow and Infiltration (1/1) problem. However, a records review revealed flow violations for the months of January, March, November 2015 and January 2106..These,violations were caused by wet weather periods which indicates more work needs to be done to correct the City's I/1 problem. •The November 2015 eDMR was compared to the monthly laboratory bench sheets and no transcription errors were found. Page# 2 Permit: NC0043176 • Inspection Date: 03/16/2016 Owner - Facility: Dunn W WTP Inspection Type: Compliance Evaluation Operations & Maintenance Yes No 'NANE Is the plant generally clean with acceptable housekeeping? ❑ ❑ ❑ Does. the facility analyze process control parameters, for ex: MLSS, MCRT,. Settleable ▪ ❑ • El ❑ Solids, pH, DO, Sludge Judge, 'and other that are applicable? Comment: Permit (If the present permit expires in 6 months or less). Has the permittee submitted a new application? Is the facility as described in the permit? # Are there any special conditions for the permit? Is access to the plant site restricted.to the general public? Is the inspector granted access to all areas for inspection? Comment: Record Keeping Are records kept and maintained as required by the permit? Is all required information readily available, complete and current? Are all records maintained for 3 years (lab. reg. required 5 years)? Are analytical results consistent with data reported on DMRs? .J Is the chain -of -custody complete? Dates, times and location of sampling Name of-individual,performing:the sampling Results of analysis -and calibration Dates of analysis Name of -person performing analyses Transported COCs Are DMRs complete: do they include all permit parameters? Has the facility submitted its annual compliance report to users and DWQ? (If the facility is 7 or > 5 MGD perinitted'-flow) Do they operate 24/7 with a certified operator on each shift? Is the ORC visitation log available and current? Is the ORC certified at grade equal to or higher than the facility classification? Is the backup operator certified at grade less or greater than the facility classification? Is a copy of the current NPDES permit available on site? Yes. -No .NA NE -II El El • ❑ ❑ ❑ D. ❑ U EL. El �.0❑ 0 Yes No NA NE ▪ ❑ ❑ ❑ ▪ ❑ ❑ ❑ p El El • ■ ❑ ❑ ❑ • ❑ ❑ ❑ —▪ ❑ ❑ El El El III 10 ❑ ❑ ❑ • .b ❑ ❑ --o ❑ ❑ ❑ ❑ ❑ Page# 3 Permit: NC0043176 Inspection Date: 03/16/2016 Owner -Facility: DunnWWfP Inspection Type: Compliance Evaluation Record Keeping Facility has copy of previous year's Annual Report on file for review? Comment: Yes No NA NE MI ❑ ❑ ❑ Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? ® ❑ 0 0 Is flow meter calibrated annually? 1 0 ❑ 0 Is the flow meter operational? _ ® 0 0 ❑ (If units are separated) Does the chart recorder match the flow meter? ' ❑ ❑ 0 111 Comment: Aerobic Digester Yes No NA NE Is the capacity adequate? 11 0 ❑ ❑ Is the mixing adequate? 11 0 0 ❑ Is the site free of excessive foaming in the tank? • 0 ❑ 0 # Is the odor acceptable? 11 0 0 0 # Is tankage available for properly waste sludge? •❑ 0 0 Comment: Solids Handling Equipment Is the equipment operational? Is the chemical feed equipment operational? Is storage adequate? Is the site free of high level of solids in filtrate from filter presses or vacuum filters? Is the site free of sludge buildup on belts and/or rollers of filter press? Is th'e site free of excessive moisture in belt filter press sludge cake? The facility has an approved sludge management plan? ._Comment:,_ Pump Station.- Effluent Is the pump wet well free of bypass lines or structures? Are all pumps present? Are all pumps operable? Are float controls operable? Yes No NA NE El ❑ ❑ ❑ 11 ❑ 0 ❑ , ❑ ❑ ❑ ❑ ❑ I ❑ ❑ ❑11 ❑ ❑ ❑ 11 ❑ MI ❑l ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • .❑ ❑ ❑ ▪ ❑ ❑ ❑ Page# 4 Permit: NC0043176 Inspection Date:, 03/16/2016 Owner -Facility: DunnWWfP Inspection Type: Compliance Evaluation Pump Station'- Effluent Is SCADA telemetry available and operational? Is audible and visual alarm available and operational? Comment: Pump Station - Influent Is the pump wet well free of bypass lines or structures? Is the wet well free of excessive: grease? Are all.pumps present? Are all pumps operable? ' Are float controls operable? Is SCADA telemetry available end • operational? Is audible and visualalarm available and operational? Comment: Bar Screens Type of bar screen a.Manual b.Mechanical Are the bars adequately screening debris? Is the screen free of excessive debris? Is disposal of screening in compliance?` Is the.unit in -good condition? Comment: Grit Rernoval_ Type of grit removal a.Manual b.Mechanical = Is thegrit free of excessive organic matter? Is the grit free of excessive odor? #is disposal of grit.in,compliance? Comment: .Yes No -NA r NE -" -p ❑ ❑.,❑ : Yes No NA NE � . ❑ ❑ ❑, ▪ ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ - Yes No, NA NE.. Yes''No'NA NE:'>::' Page# 5 - Inspection Date: 03/16/2016 Permit: NC0043176 Owner - Facility: Dunn WWTP Inspection Type: Compliance Evaluation Equalization Basins Is the basin aerated? •„• Is the basin free of bypass lines or structures to the natural 'environment? Is the basin free of excessive grease? Are all pumps present? Are all pumps operable? Are float controls operable? Are audible and visual alarms operable? # Is basin sie/volume adequate? Comment: Secondary Clarifier Is the clarifier free of black and odorous wastewater? ' . Is the site free of excessive buildup of solids in center well of circular clarifier? Are weirs level? Is the site free of weir blockage? - Is the site free of evidence of short-circuiting? Is scum removal adequate? Is the site free of excessive floating sludge? Is thedriveunit operational? Is the return rate acceptable (low turbulence)? Is the overflow clear:of excessive solids/pin floc? Is the sludge blanket level acceptable? (Approximately % of the sidewall depth) Comment: Aeration;Basins Mode of operation Type of aeration system • Is the basin free of dead spots? Are SO-leap:aerators:end mixers operational? Are diffusers operational? Is the foarn,theproper color for the treatment process? Dees the foam cover less than 25% of the basin's,surface? Is the DO level acceptable? Yes, No NA, NE • th.o 0.; ▪ 0 0 0' ▪ El 1=1 IN 0 El 0 11 El 0 0 ▪ 1=1 El 0 0 •1=1 0 • 0 0 El 11 Yes No NA. NE - Ext. )?,kir, Diffused , p .1=1 0 • 0 II 0 0 1=1 . • 1=1 Ell 0 1000 Page# 6 Permit: NC0043176 Inspection Date: 03/16/2016' Owner - Pacility: Dunn VVI TP Inspection Type: Compliance Evaluation Aeration Basins Is the DO level acceptable?(1.0 to 3.0 mg/I) Comment: r De -chlorination Type of system ? Is the feed ratio proportional to chlorine amount (1 to 1)? Is storage appropriate for cylinders? # Is de -chlorination substance stored away from chlorine containers? Comment: Are the tablets the proper size and type? . Are tablet de -chlorinators operational? Number of tubes in use? Comment: Yes No NA -NE � ❑ 0 0 Yes No NA NE Liquid • ❑ ❑ ❑ ❑ ❑ • ❑ 11000 ❑ ❑ U ❑ Standby Power Yes No NA NE Is automatically activated standby power available? • .: ❑ 0 -.❑ Is the generator tested by interrupting primary power source? 1, ❑ .❑ 0 Is the generator tested under Toad? - , ❑ ,0 : 0 Was generator.tested & operational during the inspection? .❑ ❑, ❑ • Do the generator(s) have adequate capacity to operate the entire wastewater site? 1 0 0 0 Is there an emergency agreement with a fuel vendor for.extended run on.back-up power? ❑ 0 ❑ Is the generator fuel level monitored? • 0 Cl Comment: Pumps-RAS WAS Are pumps it place? —Are pumps•operational? Are there adequate spare parts.and supplies on site? Comment: Laboratory Are field parameters performed by certified personnel or laboratory? -Are all other parameters(excluding field parameters) performed by a certified lab? Yes No NA =NE' siobth ❑ ❑- Yes" No"•NA NE II ❑ ❑ ❑ Page# Permit: NC0043176 Owner - Facility: Dunn wwTP Inspection Date: 03/16/2016 Inspection Type: Compliance Evaluation Laboratory # Is the facility using a contract,Iab? # Is proper temperature set for sample storage (kept at Tess than or equal to 6.0 degrees Celsius)? Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? Comment: Disinfection -Liquid Is there adequate reserve supply of disinfectant? (Sodium Hypochlorite) Is pump feed system operational? Is bulk storage tank containment area adequate? (free of leaks/open drains) Is the level of chlorine residual acceptable? Is the contact chamber free of growth, or sludge buildup? Is there chlorine residual prior to de -chlorination? Comment: Influent Sampling - # Is composite sampling flow proportional? Is sample collected above side streams? Is proper volume collected? Is the tubing clean? # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)? Is sampling performed according to the permit? Comment: Effluent Sampling Is composite sampling flow proportional? Is sample collected below all treatment units? Is proper volume collected? Is the tubing clean? # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type representative)? Yes No NA NE 11 ❑ ❑ ❑ ▪ Cl ❑ ❑ ▪ ❑ ❑ ❑ ❑ ❑ II ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ ® ❑ ❑ ❑ II ❑ ❑ ❑ ❑ ❑ ❑ MI M.❑ ❑ ❑ Yes No NA NE ❑ ❑ .11 ❑ II ❑ ❑ ❑ ❑ ❑ ❑ •❑ ❑ ❑ ❑ ❑ ❑ 1 ❑ ❑ ❑ Yes No NA NE — ▪ ❑L❑ -❑ -- ___ • El ❑ ❑ ® ❑ ❑ ❑ II ❑ ❑ ❑ ▪ ❑ ❑ ❑ 1 ❑ ❑ ❑ Page# 8 Permit: NC0043176 Owner - FaCility: Dunn WVVTP Inspection Date': 03/16/2016 Inspection type: Compliance Evaluation Effluent Sampling Comment: Upstream / Downstream Sampling Is the facility sampling performed as required by the permit (frequency, sampling type, and sampling location)? Comment: Facility is a member of the Middle Cape Fear River Basin Association. Yes No NA NE Yes No NA NE El El II D1 Page# 9