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Home My WebLink AboutNC0068888_Compliance Evaluation Inspection_20211007ROY COOPER COVEITIVF ELIZABETH S. BISBR S. DAI IIEL SMITH D+1 wor FORTH CAROLINA Environmental Quality October 7, 2021 Mr. Bill Trudnak, Public Works Director Town of Dallas 210 North Holland Street Dallas, NC 28034 Subject: Compliance Evaluation Inspection Dallas WWTP NPDES Permit No. NC0068888 Gaston County Dear Mr. Trudnak: Enclosed is a copy of the Compliance Evaluation Inspection for the inspection conducted at the subject facility on August 24, 2021, by Ori Tuvia. Michael Stafford's cooperation during the site visit was much appreciated. Please advise the staff involved with this NPDES Permit by forwarding a copy of the enclosed report. Overall the facility appeared to have significantly improved since the past inspection. However, the following areas need to be addressed: 1) At the time of the inspection, it was evident that the screening was not adequate with large debris passing through. The facility staff has done good job removing debris from the downstream treatment units, however, improving the bar screen will help the entire treatment system. 2) It was discovered during the inspection that the lab is using instrumentation that is used for chlorine with a detection limit of 20 ug/L, which is higher than the permit limit of 18 ug/L. Chlorine sampling must be done by an instrument with detection limit lower than the permit limit. You are requested to respond to this inspection report in writing within fifteen (15) days of receipt indicating your Plan of Action to resolve the non-compliance issues. °4m11:EnC.1T) State of North Carolina I Environmental Quality I Water Resources 1 Water Quality Regional Operations Mooresville Regional Office 1610 East Center Avenue, Suite 301 I Mooresville, North Carolina 28115 704 663 1699 The report should be self-explanatory; however, should you have any questions concerning this report, please do not hesitate to contact Ori Tuvia at (704) 235-2190, or at ori.tuvia@ncdenr.gov. Sincerely, DocuSigned by: A wHNut4 F161 FB69A2D84A3... for W. Corey Basinger Regional Supervisor Mooresville Regional Office Division of Water Resources Cc: NPDES, MRO Files (Laserfiche) United States Environmental Protection Agency EPA 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 Code NPDES yr/mo/day Inspection Type Inspector Fac Type 1 IN I 2 L I 3 I NC0068888 111 121 21/08/24 117 18 i i 19 I S I 201 21IIIIII IIIIIIIIIII IIIIIII I IIIIII IIIIIIIIIII P6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA Reserved 67I2.0 I 70I4 I 71IN I 72 I N I 731 I 74 751 I I 1 I I I I I I 180 l 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) 10:30AM 21/08/24 20/07/01 Dallas WWTP 704 E Holly St Exit Time/Date Permit Expiration Date Dallas NC 28034 11:30AM 21/08/24 25/01/31 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data /// Michael Eugene Stafford/ORC/704-922-3176/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted James M Palenick,210 N Holland St Dallas NC 280342749/Interim Town Manager/704-922-3176/7049224701 No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Flow Measurement Operations & Maintenar Records/Reports Self -Monitoring Progran Sludge Handling DispoFacility 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 ,—DocuSigned by: Ori A Tuvia DW R/M RO WQ/704-663-1699/ 10/ 7/2 0 21 `— BB057A2DE017498... Signature of Man em@Pft` i9V144Viewer Agency/Office/Phone and Fax Numbers Date Andrew Pitne �"� H PR/MRO WQ/704-663-1699 Ext.2180/ 10.07.21 F161FB69A2D84A3... EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# 1 NPDES yr/mo/day 31 NC0068888 111 121 21/08/24 I17 Inspection Type 18 [j 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# 2 Permit: NC0068888 Inspection Date: 08/24/2021 Owner - Facility: Dallas WWTP 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 El El ❑ application? Is the facility as described in the permit? • El El El # Are there any special conditions for the permit? El • El El Is access to the plant site restricted to the general public? • ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? • El El El Comment: The subject permit expires on 1/31/2025. 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 • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • • ❑ ❑ ❑ • ❑ • ❑ ❑ ❑ • ❑ ▪ ❑ ❑ ❑ ▪ El El El Comment: DMRs, COCs, ORC visitation logs and calibration logs were reviewed for the period April 2021 through June 2021. Records were well organized and maintained. Laboratory Yes No NA NE Page# 3 Permit: NC0068888 Inspection Date: 08/24/2021 Owner - Facility: Dallas WWTP 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ • ❑ Comment: Influent, effluent (including field parameters), and upstream/downstream analyses are performed under the City of Gastonia Crowders Creek Laboratory Certification #210. 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: Sampling is done in accordance with the permit. Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ IN ❑ ❑ ❑ Effluent Sampling Yes No NA NE 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 • El ❑ ❑ degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type • ❑ ❑ ❑ representative)? Comment: Sampling is done in accordance with the permit. Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, MODE and sampling location)? Comment: Page# 4 Permit: NC0068888 Inspection Date: 08/24/2021 Owner - Facility: Dallas WWTP Inspection Type: Compliance Evaluation Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? • ❑ ❑ ❑ Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable MODE Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: In general, the facility appears to be in better condition since the last inspection. Inadequate screening and clarifier weir issues are noted in the section below. It was discovered during the inspection that the lab is using instrumentation that is used for chlorine detection limit of 20 uq/L which is higher than the permit limit of 18 ug/L. Chlorine sampling must be done by an instrument with detection limit lower than the permitted limit. Bar Screens Yes No NA NE 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? • ❑ El El Is the unit in good condition? • El El El Comment: At the time of the inspection, it was evident that the screening was not adequate with large debris passing through. The facility staff has done good job removing debris from the downstream treatment units, however improving the bar screen will help the entire treatment system. Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Diffused Is the basin free of dead spots? • El El El Are surface aerators and mixers operational? El El • El Are the diffusers operational? • ❑ ❑ ❑ Is the foam the proper color for the treatment process? ■ El El El Does the foam cover less than 25% of the basin's surface? • El El El Is the DO level acceptable? • El El El Is the DO level acceptable?(1.0 to 3.0 mg/I) • ❑ ❑ ❑ Comment: Secondary Clarifier Is the clarifier free of black and odorous wastewater? Yes No NA NE Page# 5 Permit: NC0068888 Inspection Date: 08/24/2021 Owner - Facility: Dallas WWTP Inspection Type: Compliance Evaluation Secondary Clarifier Yes No NA NE 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: At the time of the inspection the clarifier were at much better shape than the previous inspection. However, the clarifier weirs had several leaks observed. The ORC indicated that the leaks have been since than fixed. Disinfection -Gas Are cylinders secured adequately? Are cylinders protected from direct sunlight? Is there adequate reserve supply of disinfectant? 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? Does the Stationary Source have more than 2500 Ibs of Chlorine (CAS No. 7782-50-5)? If yes, then is there a Risk Management Plan on site? If yes, then what is the EPA twelve digit ID Number? (1000- - ) If yes, then when was the RMP last updated? Comment: The chlorination and dechlorination systems are serviced annually by a contracted company. De -chlorination Type of system ? 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ Yes No NA NE Gas • ❑ ❑ ❑ ❑ • ❑ ❑ Page# 6 Permit: NC0068888 Inspection Date: 08/24/2021 Owner - Facility: Dallas WWTP Inspection Type: Compliance Evaluation De -chlorination Yes No NA NE Are the tablets the proper size and type? ❑ ❑ • ❑ Comment: The chlorination and dechlorination systems are stored and operated in the same building. Are tablet de -chlorinators operational? ❑ ❑ • ❑ Number of tubes in use? Comment: 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: The flow meters at each treatment train are connected to a totalizing system (with chart recording). Flow meter was last calibrated on 10/24/2020 by Clearwater. 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: Aerobic Digester Is the capacity adequate? Is the mixing adequate? Is the site free of excessive foaming in the tank? # Is the odor acceptable? # Is tankage available for properly waste sludge? Yes No NA NE ❑ ❑ ❑ • ❑ ❑ ❑ • Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: Each treatment train is equipped with an aerobic digester. The bio-solids in the aerobic digesters are land applied under permit number WQ0020912 by a contracted company, Southern Soil Builders. Drying Beds Is there adequate drying bed space? Is the sludge distribution on drying beds appropriate? Are the drying beds free of vegetation? Yes No NA NE Page# 7 Permit: NC0068888 Inspection Date: 08/24/2021 Owner - Facility: Dallas WWTP Inspection Type: Compliance Evaluation Drying Beds Yes No NA NE # Is the site free of dry sludge remaining in beds? 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: The bio-solids in the aerobic digesters are land applied under permit number WQ0020912 by a contracted company, Southern Soil Builders Page# 8