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Home My WebLink AboutNC0043532_Compliance Evaluation Inspection_201708181 t'<d Water Resources ENVIRONMENTAL QUALITY August 18, 2017 Ms Donna Davis, Utility Director Stanly County 1000 North 1St Street, Suite 12 Albemarle, North Carolina 28001 SUBJECT Compliance Evaluation Inspection West Stanly WWTP NPDES Permit NCO043532 Stanly County, NC Dear Ms Davis Gt/AIZ-7v PAT MCCRORY Govemor DONALD R VAN DER VAART Secretary S. JAY ZIMMERMAN Director RECEIVED/NCDEWWR AUG 2 2 2017 Water Quality Permitting Section On August 10, 2016, Roberto Scheller of this Office conducted an inspection at the subject facility This inspection was conducted as a Compliance Evaluation Inspection (CEI) to insure compliance with permit requirements and conditions At the time of inspection facility appeared to be well maintained and operated despite only one of three secondary clarifiers are in operation We wish to thank you and operating staff for your assistance regarding the inspection A copy of this inspection will be forwarded to the facility's Operator -in -Responsible - Charge (ORC) The enclosed report should be self-explanatory, however, should you have any questions, please do not hesitate to contact myself of Roberto Scheller at (704) 235-2204 or roberto scheller@ncdenr gov Enclosure Inspection Report cc ORC, Donald Zufall, email Wastewater Branch File Sincerely, r W Corey Basinger, Regional Supervisor Water Quality Regional Operations Section Division of Water Resources, NCDEQ dzufall@stanlycountync gov State of North Carolina I Environmental Quality I Water Resources I Water Quality Regional Operations Mooresville Regional Office) 610 East Center Avenue, Suite 3011 Mooresville, North Carolina 28115 704 663 1699 United States Environmental Protection Agency Form Approved EPA Washington, D C 20460 OMB No 2040-0057 Water Compliance Inspection Report Approval expires B-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 1 3 I NCO043532 111 12 17/08/10 17 18 C I 19 t G j 201 L_J 211 1 1 1I 1 1 1 1 11 1 1 1 I I I I I I I I I 1 1 I I I I I I I I I 11 I I I I I 166 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA Reserved --- 67 70 I, J 71 I JI 72 I N I 73 I I 174 75III 80 LJ it L_1 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 permit Number) 10 06AM 17/08/10 10/02/01 West Stanly W WTP Exit Time/Date permit Expiration Date 24939-B Barbees Grove Rd 12 15P 17/08/10 14/01/31 Oakboro NC 28129 Name(s) of Onsite Representative(s)1Titles(s)/Phone and Fax Number(s) Other Facility Data Donald G Zufall/ORC/980-621-3449/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Donna Davis, 1000 N 1st St Albemarle NC 28001/Utilities No Director/704-986-369117049863711 Section C Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenance Records/Reports Self-MQnitonng Program N Sludge Handling Disposal 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 oberto cheller MRO WQ//252-946-6481/ Q O Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date W Corey Basinger MRO WQ//704-235-2194/ EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete �^y Page# NPDES yr/mo/day Inspection Type 31 NCO043532 I11 12 17/08/10 17 181 I M Section D Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) 1 Page# 2 Permit: NCO043532 Owner - Facility west Stanly WWTP Inspection Date. 08/10/2017 Inspection Type Compliance Evaluation Permit Yes No NA NE (If the present permit expires In 6 months or less) Has the permittee submitted anew ❑ ❑ M ❑ application? M ❑ ❑ ❑ Is the facility as described In the permit? M ❑ ❑ ❑ # Are there any special conditions for the permit? ❑ ❑ 0 ❑ Is access to the plant site restricted to the general public? M ❑ ❑ ❑ Is the Inspector granted access to all areas for Inspection? M ❑ ❑ ❑ Comment Permit Is in review for renewal Permit Is for the continued operation of a 0 90 MGD wastewater treatment plant Record Keeping Yes No NA NE Are records kept and maintained as required by the permit? 0 ❑ ❑ ❑ Is all required Information readily available, complete and current? M ❑ ❑ ❑ Are all records maintained for 3 years (lab reg required 5 years)? M ❑ ❑ ❑ Are analytical results consistent with data reported on DMRs? 0 ❑ ❑ ❑ Is the chain -of -custody complete? M ❑ ❑ ❑ 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? 0 ❑ ❑ ❑ Has the facility submitted Its annual compliance report to users and DWQ? ❑ ❑ ❑ M (If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified operator ❑ ❑ M ❑ on each shift? Is the ORC visitation log available and current? M ❑ ❑ ❑ Is the ORC certified at grade equal to or higher than the facility classification? 0 ❑ ❑ ❑ Is the backup operator certified at one grade less or greater than the facility classification? M ❑ ❑ ❑ Is a copy of the current NPDES permit available on site? M ❑ ❑ ❑ Facility has copy of previous year's Annual Report on file for review? ❑ ❑ ❑ ❑ Comment All records reviewed were current and well organized Records reviewed include Process Control logs, ORC log, Daily Operations log, and Meter Calibration records It was noted that a YSI 550A meter was being used to collect DO and Temperature measurements Please note that tempeature of YSI meter should be checked aginst a NIST certified therometer and recorded in calibration log Page# 3 Permit NC0043532 Inspection Date 08/10/2017 Owner - Facility west Stanly WWTP Inspection Type Compliance Evaluation Type of bar screen E ❑ Pump Station - Influent Yes No NA NE Is the pump wet well free of bypass lines or structures? S ❑ ❑ ❑ Is the wet well free of excessive grease? ❑ ❑ ❑ 0 Are all pumps present? N ❑ ❑ ❑ Are all pumps operable? N ❑ ❑ ❑ Are float controls operable? E ❑ ❑ ❑ Is SCADA telemetry available and operational? ❑ ❑ 0 ❑ Is audible and visual alarm available and operational? N ❑ ❑ ❑ Comment Bar Screens Yes No NA NE Type of bar screen E ❑ ❑ ❑ a Manual ❑ ❑ ❑ ❑ b Mechanical E ❑ ❑ ❑ ,Are the bars adequately screening debris? 0 ❑ ❑ ❑ Is the screen free of excessive debris? E ❑ ❑ ❑ Is disposal of screening in compliance? E ❑ ❑ ❑ Is the unit In good condition? ❑ ❑ ❑ 0 Comment Bar screen is scheduled for removal and replacement Grit Removal Yes No NA NE Type of grit removal E ❑ ❑ ❑ a Manual ❑ ❑ ❑ ❑ b Mechanical E ❑ ❑ ❑ Is the grit free of excessive organic matter? ❑ ❑ N ❑ Is the grit free of excessive odor? ❑ ❑ N ❑ # Is disposal of grit In compliance? ❑ ❑ 0 ❑ Comment Grit removal schedule for removal and replacement It was noted that grit removal not operating at time of inspection Chemical Feed Yes No NA NE Is containment adequate? E ❑ ❑ ❑ Is storage adequate? 0 ❑ ❑ ❑ Are backup pumps available? 0 ❑ ❑ ❑ Is the site free of excessive leaking? N ❑ ❑ ❑ Page# 4 t' Permit NCO043532 Inspection Date 08/10/2017 Chemical Feed Comment Chemical feed at pump station to reduce odor Owner -Facility west Stanly WWrP Inspection Type Compliance Evaluation 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? Yes No NA NE Yes No NA NE ❑ E ❑ ❑ ■ ❑ ❑ ❑ E ❑ ❑ ❑ N ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment Temperature of Influent sampler was recorded at 3 degrees Celsius at time of Inspection 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 Process control on MLSS was well documented Aeration Basins Mode of operation 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) Yes No NA NE N ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE Ext Air Surface ■ ❑ ❑ ❑ N ❑ ❑ ❑ ❑ ❑ N ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ N N ❑ ❑ ❑ Comment MLSS had good color and appeared to have good settleabllty in secondary clarifier Secondary 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? 0 ❑ ❑ ❑ Are weirs level? N ❑ ❑ ❑ Page# 5 I Permit NCO043532 Owner - Facility west Stanly WWTP Inspection Date 08/10/2017 Inspection Type Compliance Evaluation Secondary Clarifier Yes No NA NE Is the site free of weir blockage? E ❑ ❑ ❑ 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? E ❑ ❑ ❑ 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 % of the sidewall depth) ❑ ❑ ❑ E Comment Effluent from secondary clarifier was clear with few suspended solids ❑ Disinfection -Gas Yes No NA NE Are cylinders secured adequately? 0 ❑ ❑ ❑ Are cylinders protected from direct sunlight? 0 ❑ ❑ ❑ Is there adequate reserve supply of disinfectant? - 0 ❑ ❑ ❑ Is the level of chlorine residual acceptable? ❑ ❑ ❑ 0 Is the contact chamber free of growth, or sludge bui dup? E ❑ ❑ ❑ Is there chlorine residual prior to de -chlorination? 0 ❑ ❑ ❑ Does the Stationary Source have more than 2500 lbs of Chlorine (CAS No 7782-50-5)? ❑ ❑ E ❑ If yes, then Is there a Risk Management Plan on site? ❑ ❑ N ❑ If yes, then what is the EPA twelve digit ID Number? (1000-____:-____) If yes, then when was the RMP last updated? Comment - De -chlorination Yes No NA NE Type of system ? Gas Is the feed ratio proportional to chlorine amount (1 to 1)? ❑ ❑ ❑ ❑ Is storage appropriate for cylinders? ❑ ❑ ❑ # Is de -chlorination substance stored away from cnIorine containers? ❑ ❑ ❑ Comment Are the tablets the proper size and type? ❑ ❑ N ❑ Are tablet de-chlonnators operational? ❑ ❑ N ❑ Number of tubes in use? Page# 6 Permit. NCO043532 Owner - Facility west Stanly WWTP Inspection Date. 08/10/2017 Inspection Type Compliance Evaluation De -chlorination Yes No NA NE Comment Effluent Sampling Yes No NA NE Is composite sampling flow proportional? N ❑ ❑ ❑ Is sample collected below all treatment units? # Is flow meter used for reporting? ❑ ❑ ❑ Is proper volume collected? Is flow meter calibrated annually? ❑ ❑ ❑ Is the tubing clean? Is the flow meter operational? ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6 0 degrees 0 ❑ ❑ ❑ Celsius)? ❑ ❑ 0 ❑ Is the facility sampling performed as required by the permit (frequency, sampling type M ❑ ❑ ❑ representative)? Comment At time of Inspection effluent sampler was noted at 3 deqrees Celsius At time of Inspection effluent was clear with no visible suspended solids Yes No NA NE Is the equipment operational? N ❑ ❑ Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? M ❑ ❑ ❑ Is flow meter calibrated annually? ❑ ❑ ❑ ❑ Is the flow meter operational? N ❑ ❑ ❑ (If units are separated) Does the chart recorder match the flow meter? M ❑ ❑ ❑ Comment Flow mearurement consist of V -notch weir and ultra sonic flow meter with chart recorder Flow meter was last calabrated on July 27, 2017 by Clearwater, Inc Solids Handling Equipment Yes No NA NE Is the equipment operational? N ❑ ❑ ❑ Is the chemical feed equipment operational? ❑ ❑ 0 ❑ Is storage adequate? 0 ❑ ❑ ❑ Is the site free of high level of solids In filtrate from filter presses or vacuum filters? ❑ ❑ 0 ❑ Is the site free of sludge buildup on belts and/or rollers of filter press? ❑ ❑ 0 ❑ Is the site free of excessive moisture In belt filter press sludge cake? ❑ ❑ 0 ❑ The facility has an approved sludge management plan? 0 ❑ ❑ ❑ Comment Facility has aerobic sludge digester with floating aerators and Is decanted to thicken sludge Sludge Is removed for disposal at the Rock River UWV P Page# 7