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Home My WebLink AboutNC0030210_Compliance Evaluation Inspection_20221117 (2)ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director Joseph Lockler, Operations Chief Environmental Management Division Charlotte Water 15100 Brookshire Blvd. Charlotte, NC 28216 SUBJECT: Compliance Evaluation Inspection Mallard Creek WWTP NPDES Permit No. NC0030210 Mecklenburg County Dear Mr. Lockler: NORTH CAROLINA Environmental Quality November 17, 2022 Enclosed is a copy of the Compliance Evaluation Inspection (CEI) Report for the inspection conducted at the subject facility on November 10, 2022, by Mr. Wes Bell of this Office. Please advise the facility's Operator -in -Responsible Charge (ORC) of our findings by forwarding the enclosed report. Should you have any questions concerning this report, please do not hesitate to contact Mr. Bell at (704) 235-2192 or at wes.bell@ncdenr.gov. Enclosure: Inspection Report Cc: NPDES Program Files - Laserfiche D_E o,.mworkt G.ed o � Sincerely, DocuSigned by: F161 FB69A2D84A3... Andrew H. Pitner, P.G. Assistant Regional Supervisor Water Quality Regional Operations Section Mooresville Regional Office Division of Water Resources, NCDEQ North Carolina Department of Environmental Quality I Division of Water Resources Mooresville Regional Office 1610 East Center Avenue. Suite 301 1 Mooresville. North Carolina 28115 704.663.1699 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 1 IN I 2 21 1 1 1 1 L 1 NPDES yr/mo/day Inspection 3 I NC0030210 111 121 22/11/10 117 Type 1810I I I 1 1 1 Inspector Fac Type 191 S I 2011 1 1 1 1 11 1 1 1 I I I 1 1 1 1 1 1 I I I I I 1 11 1 1 1 I 1 P6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA Reserved 67I2.0 I 70I4 I 71IN I 72 I N I 731 1 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 POTW name and NPDES permit Number) Mallard Creek WWTP 12400 US Hwy 29 N Charlotte NC 28262 Entry Time/Date 09:20AM 22/11/10 Permit Effective Date 20/02/01 Exit Time/Date 02:OOPM 22/11/10 Permit Expiration Date 24/11/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Henry Harrison Eudy/ORC/980-214-5977/ Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Angela D Charles,5100 Brookshire Blvd Charlotte NC 282163371//704-336-5911/ 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 Laboratory Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) (See attachment summary) Name(s) and Signature(s) Wes Bell of Inspector(s) Agency/Office/Phone and Fax Numbers Date -Docusiyned by: DWR/MRO WQ/704-663-1699 Ext.2192/ 11/16/2022 'ioe ell "-A61696D9OCC3437... Signature of Ma#}4�1�t8viewer Andrew Pit Agency/Office/Phone and Fax Numbers Date erA4 "/ H P' [3WR/MRO WQ/704-663-1699 Ext.2180/ 11.17.22 F161FB69A2D84A3... EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# 1 31 NPDES yr/mo/day NC0030210 111 121 22/11/10 117 Inspection Type 18 [j 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) On -site Representatives: The following Charlotte Water staff were in attendance during the inspection: Mr. Joseph Lockler, Mr. Darrell DeWitt, Mr. Henry Eudy, Mr. William Williams, Mr. Shannon Sypolt, Mr. Doug Wise, and Mr. Mike Christiansen. Page# 2 Permit: NC0030210 Inspection Date: 11/10/2022 Owner - Facility: Mallard Creek 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 ❑ ❑ ❑ application? Is the facility as described in the permit? • ❑ El El # 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: Charlotte Water implements a Division approved Industrial Pretreatment Program. The disc filters,dual UV channels and cascade aeration system have been installed per Division -approved Authorization to Construct (AtC) dated 7/26/2019. Charlotte Water has also initiated construction activities (ground clearing) for the new equalization basins (5.3 MG and 14.7 MG) per Division -approved AtC dated 8/19/2022. The additional treatment equipment included in the 8/19/2022 AtC have not been installed to date. The last compliance evaluation inspection at this facility was performed by DWR staff on 11/17/2020. 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: NC0030210 Inspection Date: 11/10/2022 Owner - Facility: Mallard Creek WWTP Inspection Type: Compliance Evaluation Record Keeping Facility has copy of previous year's Annual Report on file for review? Yes No NA NE Comment: The records reviewed during the inspection were organized and well maintained. Discharge Monitoring Reports (eDMRs) were reviewed from October 2021 through September 2022. No limit and/or monitoring violations were noted during the review period. 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 and effluent analyses are performed by Charlotte Water Environmental Services Laboratory (Certification #192). ETT Environmental and ETS have been contracted to perform effluent chronic toxicity tests. 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 • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: The subject permit requires influent BOD and TSS composite samples. The composite samplers are calibrated weekly and checked (for proper operation) every shift. 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)? Yes No NA NE • ❑ ❑ ❑ IN El El El • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 4 Permit: NC0030210 Inspection Date: 11/10/2022 Owner - Facility: Mallard Creek WWTP Inspection Type: Compliance Evaluation Effluent Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type • ❑ ❑ ❑ representative)? Comment: The subject permit requires composite and grab effluent samples. The composite samplers are calibrated weekly and checked (for proper operation) every shift. Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, ME101=1 and sampling location)? Comment: 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: The wastewater treatment facility appeared to be properly operated and well maintained. Facility staff incorporate a comprehensive process control program with all measurements being properly documented and maintained on -site. In-depth operation and maintenance records are also maintained on -site. Approximately nine (9) SCADA stations are located throughout the treatment plant site. The facility's SCADA system was operational and in service. 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: Yes No NA NE • • ❑ ❑ ❑ • ❑ ❑ ❑ Pump Station - Influent Yes No NA NE 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? • ❑ ❑ ❑ Page# 5 Permit: NC0030210 Inspection Date: 11/10/2022 Owner - Facility: Mallard Creek WWTP Inspection Type: Compliance Evaluation Pump Station - Influent Is SCADA telemetry available and operational? Is audible and visual alarm available and operational? Comment: Yes No NA NE • ❑ ❑ ❑ 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? • ❑ ❑ ❑ # Is disposal of grit in compliance? • ❑ ❑ ❑ Comment: Screenings and grit are disposed at the Republic Services/CMS Landfill located in Cabarrus County. Equalization Basins Is the basin aerated? Is the basin free of bypass lines or structures to the natural environment? Is the basin free of excessive grease? Are all pumps present? Are all pumps operable? Are float controls operable? Are audible and visual alarms operable? # Is basin size/volume adequate? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ Comment: The facility is equipped with two day tanks (1 MG total) and a 5 MG equalization basin. The equalization basins are connected to the on -site SCADA system. Primary 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 6 Permit: NC0030210 Inspection Date: 11/10/2022 Owner - Facility: Mallard Creek WWTP Inspection Type: Compliance Evaluation Primary Clarifier Is the drive unit operational? Is the sludge blanket level acceptable? Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth) Comment: All five primaries were operational; however, three were in service. Yes No NA NE • ❑ ❑ ❑ Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Diffused Is the basin free of dead spots? • ❑ ❑ ❑ Are surface aerators and mixers operational? • ❑ El El 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/I) • ❑ El El Comment: Two of the three aeration basin trains were in service. Each train is equipped with an anoxic basin with mixing. Magnesium hydroxide is added prior to the aeration basins to maintain appropriate alkalinity/pH levels. Chemical Feed Yes No NA NE Is containment adequate? • ❑ El El Is storage adequate? • El El El Are backup pumps available? • El ❑ ❑ Is the site free of excessive leaking? ■ El El El 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? Is scum removal adequate? Is the site free of excessive floating sludge? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ▪ ❑ ❑ ❑ Page# 7 Permit: NC0030210 Inspection Date: 11/10/2022 Owner - Facility: Mallard Creek WWTP Inspection Type: Compliance Evaluation Secondary Clarifier 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: All four secondaries were in service. Pumps-RAS-WAS Are pumps in place? Are pumps operational? Are there adequate spare parts and supplies on site? Comment: Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ Filtration (High Rate Tertiary) Yes No NA NE Type of operation: Cross flow Is the filter media present? ■ ❑ ❑ ❑ Is the filter surface free of clogging? • ❑ El ❑ Is the filter free of growth? • El El El Is the air scour operational? ❑ El • ❑ Is the scouring acceptable? El El • El Is the clear well free of excessive solids and filter media? • El El ❑ Comment: All four disc filter treatment units were operational. 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? Comment: All UV treatment units were operational. Flow Measurement - Effluent # Is flow meter used for reporting? Yes No NA NE • ❑ ❑ ❑ ▪ El El El • ❑ ❑ ❑ Yes No NA NE Page# 8 Permit: NC0030210 Inspection Date: 11/10/2022 Owner - Facility: Mallard Creek WWTP Inspection Type: Compliance Evaluation Flow Measurement - Effluent 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 are calibrated twice per year and the effluent flow meter (new mag meter) was last calibrated on 6/29/2022 by CITI, LLC. 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: The effluent appeared clear with no floatable solids or foam. The receiving stream did not appear to be negatively impacted. Anaerobic Digester Type of operation: Is the capacity adequate? # Is gas stored on site? Is the digester(s) free of tilting covers? Is the gas burner operational? Is the digester heated? Is the temperature maintained constantly? Is tankage available for properly waste sludge? Yes No NA NE Fixed cover • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: The facility is equipped with four primary anaerobic digesters and one storage tank (floating cover). Three primary digesters were currently in service. Solids Handling Equipment Yes No NA NE Is the equipment operational? • ❑ ❑ ❑ Is the chemical feed equipment operational? • El El El Is storage adequate? • El El El 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? El El • ❑ The facility has an approved sludge management plan? • El El El Page# 9 Permit: NC0030210 Inspection Date: 11/10/2022 Owner - Facility: Mallard Creek WWTP Inspection Type: Compliance Evaluation Solids Handling Equipment Yes No NA NE Comment: The facility is equipped with four centrifuges (2-thickening and 2-dewatering). One of the thickening centrifuges was not in service due to preventive maintenance activities. The sludge cake was free of excessive moisture. Dewatered bio-solids are land applied by a contract company (Syangro) under the authority of Permit No. WQ0000057. 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: The backup generator is tested under load monthly and serviced quarterly by Carolina CAT. Charlotte has constructed a new generator building with two new backup generators. The generators have not been placed into service. Page# 10