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Home My WebLink AboutNC0024112_Compliance Evaluation Inspection_20200204ROY COOPER Governor MICHAEL S. REGAN Secretary LINDA CULPEPPER Director Kelly Craver City of Thomasville PO Box 368 Thomasville, NC 27361-0368 NORTH CAROLINA Environmental Quality February 4, 2020 Subject: Compliance Evaluation Inspection Report NPDES Permit NCO024112 Hamby Creek WWTP, Davidson County Dear Mr. Craver: On January 16, 2020, Paul DiMatteo of the Division of Water Resources (Division), Winston- Salem Regional Office met with Allen Beck, Operator in Responsible Charge (ORC), to conduct a Compliance Evaluation Inspection of the above referenced wastewater treatment plant. This inspection consists of (1) a review of the permit and accompanying documentation to determine compliance with permit conditions, and (2) an on -site inspection of several collection system components. The attached inspection form notes the areas that were evaluated for the inspection, with any notable findings outlined as follows. Item of Concern — The outfall has not been observed for several years due to reported accessibility issues. Please note that the outfall's right of way should be maintained such that a periodic inspection of the outfall can be executed. If you have any questions concerning this report please contact Paul DiMatteo at (336) 776-9691 or Lon Snider at (336) 776-9800. Enclosures — Inspection Report CC: WSRO Laserfiche Files Sincerely, DocuSiiggned by: 1 _"49E225C94EA... Lon T. Snider, Regional Supervisor Water Quality Regional Operations Section Winston-Salem Regional Office Division of Water Resources, NCDEQ Noana caaouivnD Q>� o.Pa�mwm or �w�mmvi w.i� North Carolina Department of Environmental Quality I Division of Water Resources Winston-Salem Regional Office 1 450 West Hanes Mill Road, Suite 300 I Winston-Salem, North Carolina 27105 336.776.9800 United States Environmental Protection Agency Form Approved. EPA 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 IN 1 2 15 I 3 I NCO024112 111 12 I 20/01/16 I17 18 I S J 19 L G] 201 I 211111 I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I II I I I I I f6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 671 70 I I 71 I I 72 I r I 73 I I 174 751 I I I I I I I80 u ty I I i Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include Entry Time/Date Permit Effective Date POTW name and NPDES oermit Number) 10:15AM 20/01/16 14/10/01 Hamby Creek WWTP 110 Optimist Park Rd Exit Time/Date Permit Expiration Date Thomasville NC 27360 12:30PM 20/01/16 19/04/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Allen R Beck/ORC/336-475-4246/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Kelly Craver,PO Box 368 Thomasville NC 273610368/Assistant City Manager/336-475-4220/3364754283 No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenance Records/Reports Self -Monitoring Program 0 Facility Site Review Effluent/Receiving Waters 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 Paul DiMatteo DocuSigned by: DWR/WSRO WQ/336-776-9691/ 4I;m ��- 2/4/2020 F10C7C2E5131334D4... Signature of Management Q A ReviewerAgency/Office/Phone and Fax Numbers Date DocuSigned by: FLl T Sn. er 2/4/2020 EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# NPDES yr/mo/day Inspection Type NCO024112 I11 121 20/01/16 117 18 JCJ Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# Permit: NCO024112 Owner - Facility: Hamby Creek WWTP Inspection Date: 01/16/2020 Inspection Type: Compliance Evaluation 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 ❑ ❑ ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Permit Yes No NA NE (If the present permit expires in 6 months or less). Has the permittee submitted a new 0 ❑ ❑ ❑ application? Is the facility as described in the permit? 0 ❑ ❑ ❑ # Are there any special conditions for the permit? 0 ❑ ❑ ❑ Is access to the plant site restricted to the general public? 0 ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? 0 ❑ ❑ ❑ Comment: Note that the Cannibal system is not is use due to problems with phosphorus reduction. 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? 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 = or > 5 MGD permitted 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 one grade less or greater than the facility classification? Is a copy of the current NPDES permit available on site? Yes No NA NE ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Page# 3 Permit: NCO024112 Inspection Date: 01/16/2020 Record Keeping Facility has copy of previous year's Annual Report on file for review? Comment: Owner - Facility: Hamby Creek WWTP Inspection Type: Compliance Evaluation Flow Measurement - Influent # Is flow meter used for reporting? Is flow meter calibrated annually? Is the flow meter operational? (If units are separated) Does the chart recorder match the flow meter? Comment: Flow is recorded on SCADA. Yes No NA NE ■ ❑ ❑ ❑ Yes No NA NE ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ 2 ft Parshall flume with ultrasonic level sensor. In response to the previous inspection the ultrasonic sensor was moved to a more appropriate location. The flow meter was calibrated on 3/7/2019. Influent Sampling Yes No NA NE # Is composite sampling flow proportional? 0 ❑ ❑ ❑ Is sample collected above side streams? 0 ❑ ❑ ❑ Is proper volume collected? 0 ❑ ❑ ❑ Is the tubing clean? 0 ❑ ❑ ❑ # 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? 0 ❑ ❑ ❑ Comment: The influent sampler is set to take 100 ml every 50,000 gallons. Bar Screens Yes No NA NE Type of bar screen a.Manual ❑ b.Mechanical Are the bars adequately screening debris? 0 ❑ ❑ ❑ Is the screen free of excessive debris? 0 ❑ ❑ ❑ Is disposal of screening in compliance? 0 ❑ ❑ ❑ Is the unit in good condition? 0 ❑ ❑ ❑ Comment: Grit Removal Yes No NA NE Page# 4 Permit: NCO024112 Inspection Date: 01/16/2020 Owner - Facility: Hamby Creek WWTP Inspection Type: Compliance Evaluation Grit Removal Yes No NA NE Type of grit removal a.Manual ❑ b.Mechanical Is the grit free of excessive organic matter? ❑ ❑ ❑ Is the grit free of excessive odor? 0 ❑ ❑ ❑ # Is disposal of grit in compliance? 0 ❑ ❑ ❑ Comment: Oxidation Ditches Yes No NA NE Are the aerators operational? 0 ❑ ❑ ❑ Are the aerators free of excessive solids build up? 0 ❑ ❑ ❑ # Is the foam the proper color for the treatment process? 0 ❑ ❑ ❑ Does the foam cover less than 25% of the basin's surface? 0 ❑ ❑ ❑ Is the DO level acceptable? ❑ ❑ ❑ Are settleometer results acceptable (> 30 minutes)? ❑ ❑ ❑ Is the DO level acceptable?(1.0 to 3.0 mg/1) ❑ ❑ ❑ Are settelometer results acceptable?(400 to 800 ml/I in 30 minutes) ❑ ❑ ❑ Comment: 5 stage Bardenpho process takes place in oxidation ditch. Mr. Beck said his targets for DO are <0.5 in the anaerobic zone, —0.5 in the anoxic zone and >0.5 in the oxic zone. Nutrient Removal # Is total nitrogen removal required? # Is total phosphorous removal required? Type # Is chemical feed required to sustain process? Is nutrient removal process operating properly? 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? Yes No NA NE ❑ ■ ❑ ❑ ■ ❑ ❑ ❑ Biological ❑ ■ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Page# 5 Permit: NCO024112 Owner - Facility: Hamby Creek WWTP Inspection Date: 01/16/2020 Inspection Type: Compliance Evaluation Secondary Clarifier Yes No NA NE Is scum removal adequate? 0 ❑ ❑ ❑ Is the site free of excessive floating sludge? 0 ❑ ❑ ❑ Is the drive unit operational? 0 ❑ ❑ ❑ Is the return rate acceptable (low turbulence)? 0 ❑ ❑ ❑ Is the overflow clear of excessive solids/pin floc? 0 ❑ ❑ ❑ Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth) 0 ❑ ❑ ❑ Comment: Clarifiers are aDDroximately 15 feet deep. Mr. Beck said thev try to keep it to 2-3 feet in the winter, but it's higher now due to recent rain. Operator records indicated the blanket was about 6 feet during the inspection. Pumps-RAS-WAS Yes No NA NE Are pumps in place? 0 ❑ ❑ ❑ Are pumps operational? 0 ❑ ❑ ❑ Are there adequate spare parts and supplies on site? 0 ❑ ❑ ❑ Comment: Filtration (High Rate Tertiary) Yes No NA NE Type of operation: Cross flow Is the filter media present? 0 ❑ ❑ ❑ Is the filter surface free of clogging? 0 ❑ ❑ ❑ Is the filter free of growth? ❑ ❑ ❑ Is the air scour operational? ❑ ❑ ❑ Is the scouring acceptable? ❑ ❑ ❑ Is the clear well free of excessive solids and filter media? ❑ ❑ ❑ Comment: Disinfection - UV Yes No NA NE Are extra UV bulbs available on site? 0 ❑ ❑ ❑ Are UV bulbs clean? 0 ❑ ❑ ❑ Is UV intensity adequate? 0 ❑ ❑ ❑ Is transmittance at or above designed level? 0 ❑ ❑ ❑ Is there a backup system on site? 0 ❑ ❑ ❑ Is effluent clear and free of solids? 0 ❑ ❑ ❑ Page# 6 Permit: NCO024112 Inspection Date: 01/16/2020 Disinfection - UV Owner - Facility: Hamby Creek WWTP Inspection Type: Compliance Evaluation Yes No NA NE Comment: There are 3 UV trains, each capable of treating 5 MGD flow rate. A spare set of bulbs is kept at the facility. Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? ❑ 0 ❑ ❑ Is flow meter calibrated annually? 0 ❑ ❑ ❑ Is the flow meter operational? 0 ❑ ❑ ❑ (If units are separated) Does the chart recorder match the flow meter? ❑ ❑ 0 ❑ Comment: Effluent Sampling Yes No NA NE Is composite sampling flow proportional? 0 ❑ ❑ ❑ Is sample collected below all treatment units? 0 ❑ ❑ ❑ Is proper volume collected? 0 ❑ ❑ ❑ Is the tubing clean? E ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees 0 ❑ ❑ ❑ Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type ❑ ❑ ❑ representative)? Comment: The effluent samDler is set to take 150 ml every 25 DUlses. Mrs. Conder said she thouaht 1 pulse equated to 1000 gallons. An aliquot measured 185 ml with a graduated cylinder. Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? ❑ 0 ❑ ❑ Are the receiving water free of foam other than trace amounts and other debris? ❑ ❑ ❑ If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ 0 ❑ Comment: Effluent pipe hasn't been observed in many years. Laboratory Are field parameters performed by certified personnel or laboratory? Are all other parameters(excluding field parameters) performed by a certified lab? # Is the facility using a contract lab? # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)? Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ ■ Page# 7 Permit: NCO024112 Inspection Date: 01/16/2020 Laboratory Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? Comment: Owner - Facility: Hamby Creek WWTP Inspection Type: Compliance Evaluation Yes No NA NE ❑ ❑ ❑ ■ Page#