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Home My WebLink AboutNC0020761_202305CEI_20230530ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director Holly Minton Town Manager Town of North Wilkesboro PO Box 218 North Wilkesboro, NC 28659 NORTH CAROLINA Environmental Quality June 14, 2023 SUBJECT: Compliance Inspection Report Thurman Street WWTP NPDES WW Permit No. NCO020761 Wilkes County Dear Ms. Minton: The North Carolina Division of Water Resources conducted an inspection of the Thurman Street WWTP on 5/11/2023. This inspection was conducted to verify that the facility is operating in compliance with the conditions and limitations specified in NPDES WW Permit No. NC0020761. The findings and comments noted during this inspection are provided in the enclosed copy of the inspection report entitled "Compliance Inspection Report". There were no significant issues or findings noted during the inspection and therefore, a response to this inspection report is not required. If you should have any questions, please do not hesitate to contact Tricia Lowery with the Water Quality Regional Operations Section in the Winston-Salem Regional Office at 336-776-9691 or via email at tricia.lowery@deq.nc.gov. Sincerely, Docu Siiggned by: L Jn l . <Jn.a" 1_.49E225C94EA... Lon T. Snider, Regional Supervisor Water Quality Regional Operations Section Winston-Salem Regional Office Division of Water Resources, NCDEQ ATTACHMENTS 1. Compliance Inspection Report North Carolina Department of Environmental Qualtty I Division of Water Resources D_E �� Winston-Salem Regional Office 1 450 West Hanes Mill Road, Suite 300 1 Winston-Salem. North Carolina 27105 ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director Scotty Dale Perry Town of North Wilkesboro PO Box 218 North Wilkesboro, NC 28659 NORTH CAROLINA Environmental Quality June 14, 2023 SUBJECT: Compliance Inspection Report Thurman Street WWTP NPDES WW Permit No. NCO020761 Wilkes County Dear Mr. Perry: The North Carolina Division of Water Resources conducted an inspection of the Thurman Street WWTP on 5/11/2023. This inspection was conducted to verify that the facility is operating in compliance with the conditions and limitations specified in NPDES WW Permit No. NC0020761. The findings and comments noted during this inspection are provided in the enclosed copy of the inspection report entitled "Compliance Inspection Report". There were no significant issues or findings noted during the inspection and therefore, a response to this inspection report is not required. If you should have any questions, please do not hesitate to contact Tricia Lowery with the Water Quality Regional Operations Section in the Winston-Salem Regional Office at 336-776-9691 or via email at tricia.lowery@deq.nc.gov. ATTACHMENTS 1. Compliance Inspection Report Sincerely, DocuSigned by: %w. T. c.J<,,1 tr 145B49E225C94EA... Lon T. Snider, Regional Supervisor Water Quality Regional Operations Section Winston-Salem Regional Office Division of Water Resources, NCDEQ North Carolina Department of Environmental Qualtty I Division of Water Resources Winston-Salem Regional Office 1 450 West Hanes Mill Road, Suite 300 1 Winston-Salem. North Carolina 27105 336,776.9600 DocuSign Envelope ID: A59DAC3D-832C-47A5-ACD6-3A9B794EC69B 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 u 3 I NC0020761 111 121 23/05/11 I17 18 I C I 19 Ls_] 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 r6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 67 I 72 I ni I 71 I 74 79 I I I I I I I80 701 I 71 I LL J I I LJ 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 Dermit Number) 10:30AM 23/05/11 21/07/01 Thurman Street WWTP Thurman St Exit Time/Date Permit Expiration Date North Wilkesboro NC 28659 01:OOPM 23/05/11 26/06/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Scotty Dale Perry, //336-667-7129/ No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenar Records/Reports Self -Monitoring Progran 0 Sludge Handling Dispo: Facility Site Review Effluent/Receiving Wate 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 Tricia Lowery DWR/WSRO WQ/336-776-9691/ by: 5 / 3 0/2 02 3 uDocusigned Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date DocuSigned by: FLam - ?. 6/14/2023 145B49E225C94EA... EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# DocuSign Envelope ID: A59DAC3D-832C-47A5-ACD6-3A9B794EC69B NPDES yr/mo/day Inspection Type NCO020761 I11 12I 23/05/11 117 18 i c i Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) 5/30/2023 — Inspection Summary On 5/11/2023, Division of Water Resources staff Tricia Lowery conducted a routine compliance inspection at Thurman Street WWTP (NC0020761). Scott Perry (ORC) and Justin Shell (BORC) was present during the inspection. A review of records, data, treatment components, and structures was completed. This review reflected compliance with the subject permit. The only suggestion from inspector is to update charts connected to flow meter more frequently. Page# DocuSign Envelope ID: A59DAC3D-832C-47A5-ACD6-3A9B794EC69B Permit: NCO020761 Owner -Facility: Thurman Street WWTP Inspection Date: 05/11/2023 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 ❑ ❑ ❑ application? Is the facility as described in the permit? 0 ❑ ❑ ❑ # Are there any special conditions for the permit? M ❑ ❑ ❑ Is access to the plant site restricted to the general public? 0 ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? 0 ❑ ❑ ❑ Comment: Permit expires 6/30/2026. 2 MGD facility with a special condtions in permit: 1 to conduct (3) three Effluent Pollutant Scans for 2023, 2024, 2025; and 2) conduct quarterly chronic toxicity testing (Q. dubia). They have maintained their membership in the Yadkin -Pee Dee River Basin Asso. who conduct facility's instream monitoring. 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? Facility has copy of previous year's Annual Report on file for review? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ■ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 3 DocuSign Envelope ID: A59DAC3D-832C-47A5-ACD6-3A9B794EC69B Permit: NCO020761 Owner -Facility: Thurman Street WWTP Inspection Date: 05/11/2023 Inspection Type: Compliance Evaluation Record Keeping Yes No NA NE Comment: Records are in good order. DMRs reviewed: April 2022 & Jan 2023. Annual report displayed at Town Hall and on file at WWTP. Current permit was available and onsite. COC's are complete and accurate. ORC visitation log was available with no issues found. The ORC and BORC are DrODerIv certified to facilitv classification . 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: No issues found during inspection. Sludge judge readings are taken 2x/day. MLSS is settling at proper volumes. Flow Measurement - Influent 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: No issues found during inspection. Meter calibrated 3/22/23. Flow chart aligns with meter readings. Flow Measurement - Effluent # 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: No issues found during inspection. Meter calibrated 3/22/23. Flow chart aligns with meter readings. Influent Sampling Yes No NA NE # Is composite sampling flow proportional? ❑ 0 ❑ ❑ Is sample collected above side streams? 0 ❑ ❑ ❑ Is proper volume collected? ■ ❑ ❑ ❑ Is the tubing clean? ■ ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 0 ❑ ❑ ❑ degrees Celsius)? Is sampling performed according to the permit? 0 ❑ ❑ ❑ Page# 4 DocuSign Envelope ID: A59DAC3D-832C-47A5-ACD6-3A9B794EC69B Permit: NCO020761 Owner -Facility: Thurman Street WWTP Inspection Date: 05/11/2023 Inspection Type: Compliance Evaluation Influent Sampling Yes No NA NE Comment: Influent sampler set for constant time/constant volume. —110ml aliquots collected. Sampler temp = 3 C. No issues found during inspection. 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 • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment:--130ml aliquots taken at each sampling occurrence. Sampler temp = 1 C. No issues found during inspection. Pump Station - Influent Yes No NA NE Is the pump wet well free of bypass lines or structures? 0 ❑ ❑ ❑ Is the wet well free of excessive grease? 0 ❑ ❑ ❑ Are all pumps present? 0 ❑ ❑ ❑ Are all pumps operable? ■ ❑ ❑ ❑ Are float controls operable? 0 ❑ ❑ ❑ Is SCADA telemetry available and operational? ❑ ❑ 0 ❑ Is audible and visual alarm available and operational? ❑ ❑ ❑ Comment: Auto dialer system used for alarms. 4 influent pumps. 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? ■ ❑ ❑ ❑ Is the unit in good condition? 0 ❑ ❑ ❑ Comment: Screened debris hauled to landfill. Septic haulers use the manual bar screen channel. Unit is in good condition and operating properly during inspection. Page# 5 DocuSign Envelope ID: A59DAC3D-832C-47A5-ACD6-3A9B794EC69B Permit: NCO020761 Owner -Facility: Thurman Street WWTP Inspection Date: 05/11/2023 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? 0 ❑ ❑ ❑ Is the grit free of excessive odor? 0 ❑ ❑ ❑ # Is disposal of grit in compliance? 0 ❑ ❑ ❑ Comment: Grit is taken to landfill. No excessive odor or organic matter. Primary Clarifier Yes No NA NE Is the clarifier free of black and odorous wastewater? 0 ❑ ❑ ❑ Is the site free of excessive buildup of solids in center well of circular clarifier? ■ ❑ ❑ ❑ Are weirs level? 0 ❑ ❑ ❑ Is the site free of weir blockage? 0 ❑ ❑ ❑ Is the site free of evidence of short-circuiting? 0 ❑ ❑ ❑ Is scum removal adequate? 0 ❑ ❑ ❑ Is the site free of excessive floating sludge? 0 ❑ ❑ ❑ Is the drive unit operational? 0 ❑ ❑ ❑ Is the sludge blanket level acceptable? 0 ❑ ❑ ❑ Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth) 0 ❑ ❑ ❑ Comment: No excessive build up or floating sludge. Scum is being removed adequately. Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Is the basin free of dead spots? Are surface aerators and mixers operational? Are the diffusers operational? Is the foam the proper color for the treatment process? 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/1) Surface ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ■ ❑ ■ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: Aeration basin has an earthen odor, proper color and no excessive foaming. DO readings average between 2-3 mg/l. Page# 6 DocuSign Envelope ID: A59DAC3D-832C-47A5-ACD6-3A9B794EC69B Permit: NC0020761 Inspection Date: 05/11/2023 Owner -Facility: Thurman Street WWTP Inspection Type: Compliance Evaluation 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 the drive unit operational? Is the return rate acceptable (low turbulence)? Is the overflow clear of excessive solids/pin floc? Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth) Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: Sludqe blankets-2-3ft. No excessive solids. Normal build up in center well (not excessive). RAS rate is calculated and flow is manually operated (no SCADA). Weir overflow is clear. Pumps-RAS-WAS Yes No NA NE Are pumps in place? ■ ❑ ❑ ❑ Are pumps operational? 0 ❑ ❑ ❑ Are there adequate spare parts and supplies on site? 0 ❑ ❑ ❑ Comment: No issues found during inspection. Aerobic Digester Yes No NA NE Is the capacity adequate? 0 ❑ ❑ ❑ Is the mixing adequate? 0 ❑ ❑ ❑ Is the site free of excessive foaming in the tank? ■ ❑ ❑ ❑ # Is the odor acceptable? 0 ❑ ❑ ❑ # Is tankage available for properly waste sludge? 0 ❑ ❑ ❑ Comment: 2 aerated aerobic digestors with blowers at facility. No issues during time of inspection. Drying Beds Yes No NA NE Is there adequate drying bed space? 0 ❑ ❑ ❑ Is the sludge distribution on drying beds appropriate? 0 ❑ ❑ ❑ Are the drying beds free of vegetation? ■ ❑ ❑ ❑ # Is the site free of dry sludge remaining in beds? M ❑ ❑ ❑ Page# 7 DocuSign Envelope ID: A59DAC3D-832C-47A5-ACD6-3A9B794EC69B Permit: NC0020761 Inspection Date: 05/11/2023 Drying Beds Owner -Facility: Thurman Street WWTP Inspection Type: Compliance Evaluation Is the site free of stockpiled sludge? Is the filtrate from sludge drying beds returned to the front of the plant? # Is the sludge disposed of through county landfill? # Is the sludge land applied? (Vacuum filters) Is polymer mixing adequate? 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 the site free of excessive moisture in belt filter press sludge cake? The facility has an approved sludge management plan? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ■ ❑ Yes No NA NE ■ ❑ ❑ ❑ ❑ ❑ ■ ❑ ■ ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ■ ❑ ❑ ❑ Comment: No chemical feed at this facility. Components: (1) sludge thickener tank, (1) 1 million .gallon holding tank with 2 mixers. Mixers were on and tested during inspection - no issues found. Sludge management plan = pump and haul for land application use. Disinfection - UV Are extra UV bulbs available on site? Are UV bulbs clean? Is UV intensity adequate? Is transmittance at or above designed level? Is there a backup system on site? Is effluent clear and free of solids? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: UV system has scheduled maintenance 2x/year. Replacement bulbs on hand at facility. UV has generator backup. Good working order with no issues found during inspection. Standby Power Yes No NA NE Is automatically activated standby power available? 0 ❑ ❑ ❑ Is the generator tested by interrupting primary power source? ■ ❑ ❑ ❑ Is the generator tested under load? 0 ❑ ❑ ❑ Page# 8 DocuSign Envelope ID: A59DAC3D-832C-47A5-ACD6-3A9B794EC69B Permit: NC0020761 Owner -Facility: Thurman Street WWTP Inspection Date: 05/11/2023 Inspection Type: Compliance Evaluation Standby Power Yes No NA NE Was generator tested & operational during the inspection? ❑ ❑ ❑ Do the generator(s) have adequate capacity to operate the entire wastewater site? ■ ❑ ❑ ❑ Is there an emergency agreement with a fuel vendor for extended run on back-up 0 ❑ ❑ ❑ power? Is the generator fuel level monitored? ❑ ❑ ❑ Comment: Generator has regular scheduled maintenance and testing. All service is documented. Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, 0 ❑ ❑ ❑ and sampling location)? Comment: Facility maintains membership with Yadkin -Pee Dee River Basin Association. The RBA conducted all required upstream and downstream monitoring. Page# 9