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Home My WebLink AboutNC0055786_Compliance Evaluation Inspection_20210311ROY COOPER Governor DIONNE DELLI-GATTI Secretary S. DANIEL SMITH Director City of Lexington Attn: Terra A. Greene, City Manager 28 West Center Street Lexington, NC 27292-3099 NORTH CAROLINA Environmental Quality March 11, 2021 SUBJECT: Compliance Evaluation Inspection for City of Lexington Lexington Regional Wastewater Treatment Plant, NPDES Permit #: NC0055786 Davidson County Dear Ms. Greene: Ron Boone, of the NC Division of Water Resources (DWR), Winston-Salem Regional Office (WSRO), visited Lexington's Regional Wastewater Treatment Plant on February 11th, 2021, to perform a Compliance Evaluation Inspection (CEI). The assistance and cooperation of Steve Craver, Operator in Responsible Charge (ORC), was greatly appreciated. All personnel were very helpful and professional. Details of the inspections are recorded on the attached EPA Water Compliance Inspection Report. Mr. Boone found no concerns, deficiencies, or violations resulting from the inspections. If you have any questions or require further assistance, please contact Mr. Boone by phone at 336-776-9690, or by email at ron.boone@ncdenr.gov. You may also contact me by phone at 336-776-9700, or by email at lon.snider@ncdenr.gov. Sincerely, EDocuSigned by:< .—o,l . A,ac..f 145B49E225C94EA... Lon T. Snider, Regional Supervisor Water Quality Regional Operations Section Winston-Salem Regional Office Division of Water Resources, NCDEQ Attachments: 1. EPA Water Compliance Inspection Report for Lexington Regional Wastewater Treatment Plant cc: Laserfiche D_E NORTH CAROLINA Department of Environmentalao.i� North Carolina Department of Environmental Quality Division of Water Resources Winston-Salem Regional Office 1450 West Hanes Mill Road, Suite 300 I Winston-Salem, North Carolina 27105 336.776.9800 United States Environmental Protection Agency E PA Washington, D.C. 20460 Water Compliance Inspection Report Form Approved. OMB No. 2040-0057 Approval expires 8-31-98 Section A: National Data System Coding (i.e., PCS) Transaction 1 ICI Code J 2 IS NPDES yr/mo/day Inspection Type Inspector Fac I 3 I NC0055786 I11 121 21/02/11 117 18 �,- 19 G 201 Type 2111111 IIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIII 166 Inspection 671 Work Days Facility Self -Monitoring I 70I Evaluation Rating I 711 B1 I 72 QA I N I 73I Reserved I 174 L� 1 751 1 1 1 1 1 1 180 Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include POTW name and NPDES permit Number) Lexington Regional WWTP 500 Glendale Rd Lexington NC 27292 Entry Time/Date 09:OOAM 21/02/11 Permit Effective Date 21/02/01 Exit Time/Date 12:OOPM 21/02/11 Permit Expiration Date 25/04/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Steven Craig Craver/ORC/336-240-2048/ Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Joseph Shaffer,28 W Center St Lexington NC 272923099/Utility Plant Supervisor/336-357-5090/3363577369 No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Flow Measurement Operations & Maintenar Records/Reports Self -Monitoring Progran Sludge Handling Dispos Facility Site Review Effluent/Receiving Wate 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 Ron Boone DWR/WSRO WQ/336-776-9690/ ,-DocuSigned by: e,naloC Boon.* 3/10/2021 Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date IDocusigned by: 3/11/2021 Loti T. 5tiiIcr EPA ri$i5M?Sca v 9-94) Previous editions are obsolete. Page# 1 31 NPDES yr/mo/day NC0055786 111 121 21/02/11 117 Inspection Type 18 [j (Cont.) 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) There were no issues, deficiencies, or violations noted during the inspection. The plant was well operated and maintained and all processes were functioning optimally. All required records were readily available and well organized. An in depth review of February and Jun( 2020 DMRs and laboratory records revealed no errors or unreported information. All required reports have been produced and submitted and provided to system customers. Operator and laboratory certifications are all complete and current. Page# 2 Permit: NC0055786 Inspection Date: 02/11/2021 Owner - Facility: Lexington Regional VVVVTP Inspection Type: Compliance Evaluation 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? Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? Comment: None 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)? Comment: None Upstream / Downstream Sampling Is the facility sampling performed as required by the permit (frequency, sampling type, anc sampling location)? Comment: None Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ • ❑ ❑ ❑ • Yes No NA NE ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ Page# 3 Permit: NC0055786 Inspection Date: 02/11/2021 Owner - Facility: Lexington Regional VVVVTP Inspection Type: Compliance Evaluation 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: None 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 operatc 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? Comment: None Flow Measurement - Influent # Is flow meter used for reporting? Is flow meter calibrated annually? Yes No NA NE ❑ ❑ • ❑ • ❑ ❑ ❑ ❑ • ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • • • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 4 Permit: NC0055786 Inspection Date: 02/11/2021 Owner - Facility: Lexington Regional VVVVfP Inspection Type: Compliance Evaluation Flow Measurement - Influent Is the flow meter operational? (If units are separated) Does the chart recorder match the flow meter? Comment: None 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 and operational? Is audible and visual alarm available and operational? Comment: None 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: None Grit Removal Type of grit removal a.Manual b.Mechanical Is the grit free of excessive organic matter? Is the grit free of excessive odor? # Is disposal of grit in compliance? Comment: None Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 5 Permit: NC0055786 Inspection Date: 02/11/2021 Owner - Facility: Lexington Regional VVVVTP Inspection Type: Compliance Evaluation Nutrient Removal Yes No NA NE # Is total nitrogen removal required? ❑ • ❑ ❑ # Is total phosphorous removal required? ❑ • ❑ ❑ Type Biological # Is chemical feed required to sustain process? ❑ • ❑ ❑ Is nutrient removal process operating properly? • ❑ ❑ ❑ Comment: None 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) Comment: None96 Pumps-RAS-WAS Are pumps in place? Are pumps operational? Are there adequate spare parts and supplies on site? Comment: None 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? Comment: None Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 6 Permit: NC0055786 Inspection Date: 02/11/2021 Owner - Facility: Lexington Regional VVVVfP Inspection Type: Compliance Evaluation 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: None Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ De -chlorination Yes No NA NE Type of system ? Liquid 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? • ❑ ❑ ❑ Are the tablets the proper size and type? ❑ ❑ • ❑ Comment: None Are tablet de -chlorinators operational? ❑ ❑ • ❑ Number of tubes in use? Comment: None Effluent Pipe Is right of way to the outfall properly maintained? Are the receiving water free of foam other than trace amounts and other debris? If effluent (diffuser pipes are required) are they operating properly? Comment: None 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 • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ Page# 7 Permit: NC0055786 Inspection Date: 02/11/2021 Owner - Facility: Lexington Regional VVVVTP Inspection Type: Compliance Evaluation Solids Handling Equipment Comment: None Chemical Feed Is containment adequate? Is storage adequate? Are backup pumps available? Is the site free of excessive leaking? Comment: None Operations & Maintenance Is the plant generally clean with acceptable housekeeping? Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: None Standby Power Is automatically activated standby power available? Is the generator tested by interrupting primary power source? Is the generator tested under load? 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 power? Is the generator fuel level monitored? Comment: None Yes No NA NE Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ • ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 8