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HomeMy WebLinkAboutNC0047384_Compliance Evaluation Inspection_20180501 �;. ROY COOPER ?.y Governor MICHAEL S.REGAN Secretary Water Resources LINDA CULPEPPER Environmental Quality Interim Director May 1, 2018 Mr. Steven Drew,Director Water Resources Department City of Greensboro P.O.Box 3136 Greensboro,NC 27402-3136 SUBJECT: Compliance Evaluation Inspection RECE1V�®�®���®W� City of Greensboro-T.Z. Osborne WWTP MAY 10 2018 NPDES Permit No.NC0047384 Guilford County Water Resources Permitting Section Dear Mr. Drew: On April 27, 2018, Jenny Graznak of this office met with Bradley Flynt,Elijah Williams, Martie Groome and Alicia Goots to perform a Compliance Evaluation Inspection of the NPDES wastewater discharge from the T.Z. Osborne facility(TZO). The inspection fmdings are detailed below and an inspection checklist is attached. 1.Permit The current NPDES permit was issued on July 1, 2014, and a complete copy was available for review during the inspection. TZO is currently being upgraded from 40.0 MGD to 56.0 MGD to accommodate the flow from the decommissioning of the North Buffalo facility and to meet new nutrient limitations. 2. Self-Monitoring Program The monthly Discharge Monitoring Reports (DMRs)were reviewed for the period January 2017 through February 2018 for this inspection. The facility was found to be non-compliant with permit limits for Carbonaceous BOD, Fecal coliform, and TSS during this time. These violations resulted in Notices of Violation,as well as a civil penalty assessment,and were addressed through previous correspondence from this office(see violation list attached).Regarding the permit monitoring requirements, it was noted that all sampling seems to have been performed per the frequencies specified in the permit. 3.Flow Measurement The plant has three ultrasonic meters with parshall flumes that are used to report effluent flow on the DMRs. The three meters were last calibrated in February 2018 by City staff. In addition, flow proportional composite effluent samples are collected as required by the permit. 4.Sludge Handling and Disposal Sludge treatment units consist of sludge receiving tanks, gravity thickeners, centrifuges, thickened sludge holding tanks and fluidized bed incinerators. 5.Operations and Maintenance The operation and maintenance at this facility appears to be excellent. The laboratory also appeared to be excellently maintained and organized. R' Nothing Compares'-� . State of North Carolina I Environmental Quality 450 W.Hanes Mill Road,Suite 300,Winston-Salem,North Carolina 27105 Phone:336-776-98001 FAX:336-776-9797 6.Facility Site Review Please see the attached inspection checklist for specific comments on the system components. Construction at the facility is ongoing to upgrade the plant for Biological Nutrient Removal and increase the capacity from 40.0 MGD to 56.0 MGD. The estimated completion of the project is 2020.Four new bar screens have been installed recently. Six Aqua Diamond Cloth Media Filters have also been installed and appeared to be operating well. Ultimately, twelve aeration basins will all have new blowers and diffusers. The current average daily flow at the plant is approximately 31 MGD, according to operators. 7.Records/Reports All required information was readily available, complete, and current. A comparison of the October 2017 DMR with the laboratory data for Fecal coliform,Carbonaceous BOD,Ammonia,Total Residual Chlorine, and Total Suspended Solids revealed that these parameters were accurately transcribed onto the monitoring report. In addition, the Mercury Minimization Plan and the 2017 Annual Performance Report were available for review. 8.Effluent/Receiving Waters The system discharges into South Buffalo Creek,a class WS-V;NSW stream in the Cape Fear River Basin. The effluent was clear on the day of inspection. This office appreciates the efforts by City of Greensboro to comply with the permit requirements. Should you have any questions concerning this letter and attached inspection report,please contact Jenny Graznak or me at(336)776-9800. Sincerely, Ac,“,Sherri V.Knight,P.E. Regional Supervisor Water Quality Regional Operations Section Division of Water Resources cc: Elijah Williams(elijah.williamsa,greensboro-nc.gov) Bradley Flynt(Bradley.flynt@greensboro-nc.gov) Martie Groome(martie.groome@,greensboro-nc.gov) Central Files WSRO NPDES Unit Attachments: Inspection Report Monitoring Violations Report United States Environmental Protection Agency Form Approved. E PA Washington,D C 20460 OMB No 2040-0057 Water Compliance Inspection Report Approval expires 8-31-98 Section A:National Data System Coding(i.e.,PCS) Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type 1 h,j 2 LI 3 I NC0047384 I11 12 I 18/04/27 117 18 Li,„I 19 i i 201 211 h i l i I I I I I I I I I I I I I I I I I 1 1 I I I I I Ii I I I I I I I I I r6 Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA Reserved 671 I 701LJ 4 I 71I JI 72 LJ `N 731 I 174 751 1 1 1 1 1 1 180 Section B.FacilityData Name and Location of Facility Inspected(For Industrial Users discharging to POTW,also include Entry Time/Date Permit Effective Date POTW name and NPDES permit Number) 09 OOAM 18/04/27 14/07/01 T.Z Osborne WWTP 2350 Huffine Mill Rd Exit Time/Date Permit Expiration Date Mc Leansville NC 27301 12 30PM 18/04/27 19/06/30 Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data /// Bradley Todd Flynt/ORD/336-433-7262/ Eltah Lamont Williams//336-373-4632/ Martie Groome//336-433-7229/3363737720 Name,Address of Responsible Official/Title/Phone and Fax Number Contacted Steven Drew,PO Box 3136 Greensboro NC 274023136//336-373-2055/3364126305 No Section C Areas Evaluated During Inspection(Check only those areas evaluated) Permit • Flow Measurement El Operations&Maintenance • Records/Reports II Self-Monitoring Program II Sludge Handling Disposal • Facility Site Review I Effluent/Receiving Waters 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/2-Ci Jennifer F Graznaka WSRO WQ//336-771-5000/ $ itjtA44 Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date gi / EPA Form 3560-3(Rev 9-94)Previous editions are obsolete Page# 1 NPDES yr/mo/day Inspection Type (Cont) 1 31 NC0047384 111 121 18/04/27 117 18 Li Section D.Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary) 1. Permit The current NPDES permit was issued on July 1, 2014, and a complete copy was available for review during the inspection. TZO is currently being upgraded from 40 0 MGD to 56.0 MGD to accommodate the flow from the decommissioning of the North Buffalo facility and to meet new nutrient limitations. 2. Self-Monitoring Program The monthly Discharge Monitoring Reports (DMRs)were reviewed for the period January 2017 through February 2018 for this inspection. The facility was found to be non-compliant with permit limits for Carbonaceous BOD, Fecal coliform, and TSS during this time. These violations resulted in Notices of Violation as well as a civil penalty assessment and were addressed through previous correspondence from this office (see violation list attached). Regarding the permit monitoring requirements, it was noted that all sampling seems to have been performed per the frequencies specified in the permit. 3 Flow Measurement The plant has three ultrasonic meters with parshall flumes that are used to report effluent flow on the DMRs The three meters were last calibrated in February 2018 by City staff. In addition,flow proportional composite effluent samples are collected as required by the permit. 4. Sludge Handling and Disposal Sludge treatment units consist of sludge receiving tanks, gravity thickeners, centrifuges, thickened sludge holding tanks and fluidized bed incinerators. 5. Operations and Maintenance The operation and maintenance at this facility appears to be excellent. The laboratory also appeared to be excellently maintained and organized. 6. Facility Site Review Please see the attached inspection checklist for specific comments on the system components Construction at the facility is ongoing to upgrade the plant for Biological Nutrient Removal and the increase the capacity from 40.0 MGD to 56.0 MGD. Th estimate for completion of the project is 2020. Four new bar screens have been installed recently. Six Aqua Diamond Cloth Media Filters have also been installed and appeared to be operating well. Ultimately,twelve aeration basins will all have new blowers and diffusers.The current average daily flow at the plant is approximately 31 MGD, according to operators. 7. Records/Reports All required information was readily available, complete, and current. A comparison of the October 2017 DMR with the laboratory data for Fecal coliform, Carbonaceous BOD,Ammonia,Total Residual Chlorine, and Total Suspended Solids revealed that these parameters were accurately transcribed onto the monitoring report. In addition,the Mercury Minimization Plan and the 2017 Annual Performance Report were available for review. 8. Effluent/Receiving Waters The system discharges into South Buffalo Creek, a class WS-V, NSW stream in the Cape Fear River Basin. The effluent was clear on the day of inspection. Page# 2 Permit: NC0047384 Owner-Facility: T.Z.Osborne WWTP Inspection Date: 04/27/2018 Inspection Type: Compliance Evaluation Permit Yes No NA NE (If the present permit expires in 6 months or less) Has the permittee submitted a new 0 0 • 0 application? Is the facility as described in the permit? • 000 #Are there any special conditions for the permit? • 000 Is access to the plant site restricted to the general public? • ❑ ❑ ❑ Is the Inspector granted access to all areas for inspection? • 000 Comment. The current NPDES permit was issued on July 1, 2014, and a complete copy was available for review during the inspection. TZO is currently being upgraded from 40.0 MGD to 56.0 MGD to accommodate the flow from the decommissioning of the North Buffalo facility and to meet new nutrient limitations. Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? • ❑ ❑ 0 Does the facility analyze process control parameters, for ex. MLSS, MCRT, Settleable • ❑ ❑ 0 Solids,pH, DO, Sludge Judge, and other that are applicable? Comment: The operation and maintenance at this facility appears to be excellent. The laboratory also appeared to be excellently maintained and organized. Record Keeping Yes No NA NE Are records kept and maintained as required by the permit? - I ❑ ❑ ❑ Is all required information readily available, complete and current? M ❑ ❑ ❑ Are all records maintained for 3 years(lab. reg required 5 years)? • 000 Are analytical results consistent with data reported on DMRs? U ❑ ❑ ❑ Is the chain-of-custody complete? • 000 Dates,times and location of sampling • Name of individual performing the sampling E Results of analysis and calibration • Dates of analysis U Name of person performing analyses III Transported COCs • Are DMRs complete do they include all permit parameters? • 000 Has the facility submitted its annual compliance report to users and DWQ? • C11=10 (If the facility is=or>5 MGD permitted flow) Do they operate 24/7 with a certified operator • •I0 ❑ ❑ 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? U ❑ ❑ ❑ Page# 3 Permit: NC0047384 Owner-Facility: T Z.Osborne wwrP Inspection Dater 04/27/2018 Inspection Type: Compliance Evaluation Record Keeping Yes No NA NE Is the backup operator certified at one grade less or greater than the facility classification? • ❑ 0 0 Is a copy of the current NPDES permit available on site? • 0 0 0 Facility has copy of previous year's Annual Report on file for review? • 0 0 0 Comment: All required information was readily available, complete, and current. A comparison of the October 2017 DMR with the laboratory data for Fecal coliform, Carbonaceous BOD, Ammonia,Total Residual Chlorine, and Total Suspended Solids revealed that these parameters were accurately transcribed onto the monitoring report. In addition,the Mercury Minimization Plan and the 2017 Annual Performance Report were available for review. Influent Sampling Yes No NA NE #Is composite sampling flow proportional'? • ❑ ❑ p Is sample collected above side streams? • ❑ ❑ ❑ Is proper volume collected'? • 0 0 0 Is the tubing clean'? • ❑ ❑ ❑ #Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees • ❑ ❑ 0 Celsius)' Is sampling performed according to the permit? • ❑ ❑ ❑ Comment: The influent sampler refrigeration unit was 3 degrees at the time of the inspection. Since the North Buffalo facility shut down, the City has been working to incorporate that flow stream into the sampling protocol. Equalization Basins Yes No NA NE Is the basin aerated'? ❑ MI ❑ ❑ Is the basin free of bypass lines or structures to the natural environment's • ❑ ❑ 0 Is the basin free of excessive grease'? • 0 ❑ ❑ Are all pumps present? 0 ❑ ❑ • Are all pumps operable', 0 0 ❑ • Are float controls operable'? ❑ ❑ 0 • Are audible and visual alarms operable'? ❑ ❑ 0 • #Is basin size/volume adequate'? • ❑ 0 ❑ Comment: The facility now has 3.5 MG and 4 MG basins.The flow goes through the bar screen prior to the equalization basin and then is re-screened before entering through the plant.There is an odor control apparatus in use at the EQ basins Bar Screens Yes No NA NE Type of bar screen Page# 4 Permit: NC0047384 Owner-Facility: T Z.Osborne VVWTP Inspection Date: 04/27/2018 Inspection Type: Compliance Evaluation Bar Screens Yes No NA NE a.Manual 0 b.Mechanical • Are the bars adequately screening debris? E ❑ ❑ ❑ Is the screen free of excessive debns? • 000 Is disposal of screening in compliance? • 000 Is the unit in good condition? • 000 Comment: The facility has four new bar screens.The screenings shoot out into a dumbster that is taken to the landfill. Grit Removal Yes No NA NE Type of grit removal a Manual ❑ b.Mechanical III Is the grit free of excessive organic matter? • ❑ ❑ ❑ Is the grit free of excessive odor'? • ❑ ❑ ❑ #Is disposal of grit in compliance? • ❑ ❑ ❑ Comment: The stirred vortex grit removal system has four cyclones and two classifiers to dewater the inorganics.The removed grit goes to the landfill. Primary Clarifier Yes No NA NE Is the clarifier free of black and odorous wastewater'? • ❑ ❑ ❑ Is the site free of excessive buildup of solids in center well of circular clarifier'? • 000 Are weirs level? • ❑ ❑ ❑ Is the site free of weir blockage'? • 000 Is the site free of evidence of short-circuiting? • ❑ ❑ ❑ Is scum removal adequate'? • ❑ ❑ ❑ Is the site free of excessive floating sludge'? • 000 Is the drive unit operational'? M ❑ ❑ ❑ Is the sludge blanket level acceptable? ❑ ❑ DI Is the sludge blanket level acceptable'?(Approximately%<of the sidewall depth) 000 • Comment: Aeration Basins Yes No NA NE Mode of operation Ext.Air Page# 5 Permit: NC0047384 Owner-Facility: T.Z Osborne VW/TP Inspection Date: 04/27/2018 Inspection Type: Compliance Evaluation Aeration Basins Yes No NA NE Type of aeration system Diffused Is the basin free of dead spots'? • 0 0 0 Are surface aerators and mixers operational'? ❑ 0 • 0 Are the diffusers operational? • ❑ ❑ ❑ Is the foam the proper color for the treatment process'? • 0 0 ❑ Does the foam cover less than 25%of the basin's surface'? • ❑ ❑ ❑ Is the DO level acceptable'? ❑ ❑ ❑ • Is the DO level acceptable?(1 0 to 3.0 mg/I) ❑ ❑ 0 MI Comment: Ultimately, twelve aeration basins will all have new blowers and fine bubble membrane filter diffusers. Nutrient Removal Yes No NA NE #Is total nitrogen removal required? • ❑ ❑ ❑ #Is total phosphorous removal required'? • 0 ❑ ❑ Type Biological #Is chemical feed required to sustain process? 0 ❑ ❑ • Is nutrient removal process operating properly'? ❑ ❑ ❑ • Comment: Construction at the facility is ongoing to upgrade the plant for Biological Nutrient Removal Secondary Clarifier Yes No NA NE Is the clarifier free of black and odorous wastewater? • 0 ❑ 0 Is the site free of excessive buildup of solids in center well of circular clarifier? • 0 ❑ ❑ Are weirs level'? • ❑ ❑ ❑ Is the site free of weir blockage'? U 0 ❑ ❑ Is the site free of evidence of short-circuiting? • 0 ❑ ❑ Is scum removal adequate'? • 0 0 0 Is the site free of excessive floating sludge'? U ❑ ❑ ❑ Is the drive unit operational'? • ❑ ❑ ❑ Is the return rate acceptable(low turbulence)? • 0 ❑ ❑ Is the overflow clear of excessive solids/pin floc'? - • ❑ ❑ ❑ Is the sludge blanket level acceptable'?(Approximately% of the sidewall depth) ❑ ❑ ❑ II Comment: Page# 6 Permit: NC0047384 Owner-Facility: T Z.Osborne WWTP Inspection Date: 04/27/2018 Inspection Type: Compliance Evaluation Filtration (High Rate Tertiary) Yes No NA NE Type of operation. Down flow Is the filter media present? • ❑ ❑ ❑ Is the filter surface free of clogging'? • 000 Is the filter free of growth? • 000 Is the air scour operational? • 000 Is the scouring acceptable'? • 000 Is the clear well free of excessive solids and filter media'? • 000 Comment. Six new Aqua Diamon Cloth Media Filters that have been installed over the past 5 years.The sand filter effluent was clear on the day of the inspection.The"dirty"water from the filters goes back to headworks. Disinfection-Liquid Yes No NA NE Is there adequate reserve supply of disinfectant? M ❑ ❑ ❑ (Sodium Hypochlorite)Is pump feed system operational'? • 000 Is bulk storage tank containment area adequate'?(free of leaks/open drains) • 000 Is the level of chlorine residual acceptable? • ❑ ❑ 0 Is the contact chamber free of growth, or sludge buildup'? • ❑ ❑ ❑ Is there chlorine residual prior to de-chlorination'? • 000 Comment. Sodium hypochlorite is fed at the sand filters and at the effluent for disinfection.The contact chamber is brand new. De-chlorination Yes No NA NE Type of system 9 Liquid Is the feed ratio proportional to chlorine amount(1 to 1)? ❑ • ❑ ❑ Is storage appropriate for cylinders? ❑ 0110 #Is de-chlorination substance stored away from chlorine containers'? ❑ ❑ E ❑ Are the tablets the proper size and type'? ❑ ❑ • ❑ Comment. The sodium bisulfate feed is adjusted manually. Are tablet de-chlorinators operational' ❑ ❑ • ❑ Number of tubes in use'? Comment. _ Flow Measurement-Effluent Yes No NA NE #Is flow meter used for reporting'? • ❑ ❑ ❑ Page# 7 Permit: NC0047384 Owner-Facility: T Z.Osborne WWTP Inspection Date: 04/27/2018 Inspection Type: Compliance Evaluation Flow Measurement-Effluent Yes No NA NE Is flow meter calibrated annually'? • 0 0 0 Is the flow meter operational? • 0 0 0 (If units are separated)Does the chart recorder match the flow meter'? 0 0 0 • Comment The three effluent meters were last calibrated in February 2018 by City staff. Effluent Sampling Yes No NA NE Is composite sampling flow proportional'? • 0 0 0 Is sample collected below all treatment units? • 0 0 0 Is proper yolume collected'? • 0 0 0 Is the tubing clean' 0 0 0 II #Is proper temperature set for sample storage(kept at less than or equal to 6.0 degrees 0 0 0 • Celsius)' Is the facility sampling performed as required by the permit(frequency,sampling type • 0 0 0 representative)? Comment Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained'? • 0 0 0 Are the receiving water free of foam other than trace amounts and other debris'? • 0 0 0 If effluent (diffuser pipes are required) are they operating properly'? 0 ❑ • 0 Comment: The system discharges into South Buffalo Creek, a class WS-V; NSW stream in the Cape Fear River Basin. The effluent was clear on the day of inspection. Solids Handling Equipment Yes No NA NE Is the equipment operational? • ❑ ❑ 0 Is the chemical feed equipment operational'? • 0 0 0 Is storage adequate'? • 0 0 0 Is the site free of high level of solids in filtrate from filter presses or vacuum filters'? ❑ ❑ II ❑ Is the site free of sludge buildup on belts and/or rollers of filter press? 0 0 II 0 Is the site free of excessive moisture in belt filter press sludge cake'? 0 0 • 0 The facility has an approved sludge management plan'? • 0 0 0 Comment' Sludge treatment units consist of sludge receiving tanks, gravity thickeners, centrifuges, thickened sludge holding tanks and fluidized bed incinerators. Standby Power Yes No NA NE Page# 8 Permit: NC0047384 Owner-Facility: T Z.Osborne WWTP Inspection Date: 04/27/2018 Inspection Type: Compliance Evaluation Standby Power Yes No NA NE Is automatically activated standby power available? • 0 ❑ ❑ Is the generator tested by interrupting primary power source? • El 0 ❑ Is the generator tested under load? U 0 El ❑ Was generator tested&operational during the inspection'? ❑ U ❑ ❑ Do the generator(s)have adequate capacity to operate the entire wastewater site? I. 0 ❑ ❑ Is there an emergency agreement with a fuel vendor for extended run on back-up power? ❑ ❑ El U Is the generator fuel level monitored'? • ❑ ❑ ❑ Comment Three generators can operate the entire plant.They automatically switch over during a power failure.The Air Quality permit requires plant to run the generator for 30 to 60 minutes every month. Page# 9 , . 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PERMIT: NC0047384 FACILITY: City of Greensboro-T.Z.Osborne WWTP COUNTY:Guilford REGION: Winston-Salem Limit Violation MONITORING OUTFALL/ ' LOCATION PARAMETER VIOLATION UNIT OF CALCULATED % REPORT PPI DATE MEASURE VALUE Over FREQUENCY LIMIT VIOLATION TYPE VIOLATION ACTION 04-2017 001 Effluent BOD,Carbonaceous 05 Day, 04/29/17 2 X week mg/I 6 9 58 59 6 Weekly Average Proceed to NOV 20 C Exceeded 06-2017 001 Effluent BOD,Carbonaceous 05 Day, 06/24/17 2 X week mg/I 6 16 02 167 Weekly Average Proceed to NOV 20 C Exceeded 06_2017 001 Effluent BOD,Carbonaceous 05 Day, 06/30/17 2 X week mg/I 4 4 33 8 3 Monthly Average Proceed to NOV 20 C Exceeded 07-2017 001 Effluent BOD,Carbonaceous 05 Day, 07/15/17 2 X week mg/I 6 7 05 17 5 Weekly Average Proceed to NOV 20 C Exceeded 07_2017 001 Effluent BOD,Carbonaceous 05 Day, 07/31/17 2 X week mg/I 4 5 47 36 7 Monthly Average Proceed to NOV 20 C Exceeded 10-2017 001 Effluent Chlorine,Total Residual 10/20/17 5 X week ug/I 18 65 261 1 Daily Maximum Proceed to NOV Exceeded 04_2017 001 Effluent Coliform,Fecal MF,MFC 04/29/17 2 X week #/100m1 400 753 91 88 5 Weekly Geometric Mean Proceed to NOV Broth,44 5 C Exceeded 06-2017 001 Effluent Coliform,Fecal MF,MFC 06/03/17 2 X week #/100m1 400 500 97 25 2 Weekly Geometric Mean Proceed to NOV Broth,44 5 C Exceeded 06_2017 001 Effluent Coliform,Fecal MF,MFC 06/24/17 2 X week #/100m1 400 5,291 16 1,222.8 Weekly Geometric Mean Proceed to NOV Broth,44 5 C Exceeded 06-2017 001 Effluent Coliform,Fecal MF,MFC 06/30/17 2 X week #/100m1 200 597 37 198 7 Monthly Geometric Mean Proceed to NOV Broth,44 5 C Exceeded 10-2017 001 Effluent Coliform,Fecal MF,MFC 10/07/17 2 X week #/100m1 400 685 12 71 3 Weekly Geometric Mean Proceed to NOV Broth,44 5 C Exceeded MONITORING REPORT(MR)VIOLATIONS for: Report Date. 05/01/18 Page. 1 of 1 __ nrw• +,,�"!',y+-�.,,^-,,,, -m�'<Fy.^ ,.>r,.S:.5 =F'?," �«M -aixg,;r �v„ .E,,,; s,'a'n,.C„`;,` p'�"r".,,.,,'.' *;-^.... .r,..,w.-rir,;i"; «. 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