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Home My WebLink AboutNC0021156_Compliance Evaluation Inspection_20210512United 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 1 IN I 21IIIIII Code NPDES yr/mo/day Inspection 2 IL I 3 I NC0021156 111 121 21/05/11 117 Type 1810I IIIIIIIII1I Inspector Fac Type 191 S I 2011 IIIIIIIIIIIIIIIIII I IIIIII P6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA Reserved 67I1.0 I 70I3 I 711 1 72 I N I 73I 1 74 751 I I 1 1 1 1 1 1 1 I80 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) Mount Holly WWTP 165 Broome St Mount Holly NC 28120 Entry Time/Date 09:35AM 21/05/11 Permit Effective Date 19/12/01 Exit Time/Date 11:OOAM 21/05/11 Permit Expiration Date 24/02/29 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Douglas Eugene Shoutd/ORC/704-827-4261/ Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Miles Braswell,PO Box 406 Mt Holly NC 281200406/City Manager/704-827-3931/ 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 Ori A Tuvia Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date 8/24/2021 ,-DocuSigned by: DWR/MRO WQ/704-663-1699/ c -_, \—RRn70711Pf117AQR Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date W. Corey Basinger DWR/Division of Water Quality/704-235-2194/ EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. DocuSigned by: 8/24/2021 "- A14CC681AF27425... Page# 1 NPDES yr/mo/day 31 NC0021156 111 121 21/05/11 I17 Inspection Type 18 [j 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# 2 Permit: NC0021156 Inspection Date: 05/11/2021 Owner - Facility: Mount Holly 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? El • El El Is access to the plant site restricted to the general public? • ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? • ❑ ❑ ❑ Comment: The subject permit expires on 2/29/2024 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 • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: Records reviewed during the inspection were organized and well maintained. DMRs, COCs, bench sheets, calibration logs and ORC logs, were reviewed for the period of December 2020 - February 2021. Page# 3 Permit: NC0021156 Inspection Date: 05/11/2021 Owner - Facility: Mount Holly WWTP 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 • ❑ ❑ ❑ ▪ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: The subject permit requires influent BOD and TSS composite samples. Regular sampler aliquot verifications are performed and documented Effluent Sampling Yes No NA NE Is composite sampling flow proportional? • El El El Is sample collected below all treatment units? • ❑ El El Is proper volume collected? • El El El Is the tubing clean? • El ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 ■ El El El degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type • El El El representative)? Comment: The subject permit requires composite and grab effluent samples. Regular sampler aliquot verifications are performed and documented. Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, El El El and sampling location)? Comment: 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: Inspection during Covid 19, laboratory was not checked. Yes No NA NE Page# 4 Permit: NC0021156 Inspection Date: 05/11/2021 Owner - Facility: Mount Holly WWTP Inspection Type: Compliance Evaluation Laboratory Yes No NA NE 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: Yes No NA NE The facility had a major failure to one of its three aeration basins several years ago. At the time of the failure the facility indicated that the basin will be cleaned out and will be permanently out of service. However, the basin, since the failure, has not been cleaned out. At the time of the inspection, the facility appeared to be properly operated and well maintained. The ORC and staff incorporate a comprehensive process control program with all measurements being properly documented and maintained on -site. 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? Yes No NA NE • • • ❑ ❑ ❑ ❑ ❑ ❑ ❑ El El Comment: Two manual bar screens. One for the influent from the city of Mount Holly and the second for the influent of A&E industry. Screenings are disposed at the County Landfill. Mechanical fine screen drum has been out of service. Solids and grit were observed in downstream treatment units including the chlorine contact. 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? Comment: The equalization basin is equipped with three operational pumps. Yes No NA NE El El IN El • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ • Page# 5 Permit: NC0021156 Inspection Date: 05/11/2021 Owner - Facility: Mount Holly WWTP Inspection Type: Compliance Evaluation Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Surface Is the basin free of dead spots? • ❑ El El 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/I) • ❑ ❑ ❑ Comment: The facility had a major failure to one of its three aeration basins several years ago. At the time of the failure the facility indicated that the basin will be cleaned out and will be permanently out of service. However, the basin, since the failure, has not been cleaned out of solids. Aeration Basin calculations by Willis Engineers indicate the facility will be able to operate under it's normal load, 4 MGD. Lime is added on an as -needed basis to maintain appropriate alkalinity/pH levels Secondary Clarifier Yes No NA NE 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? • ❑ El El 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? • ❑ El El Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth) • ❑ ❑ ❑ Comment: Both secondary clarifiers were operational and 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 ❑ ❑ ❑ ❑ ❑ ❑ • Page# 6 Permit: NC0021156 Inspection Date: 05/11/2021 Owner - Facility: Mount Holly WWTP Inspection Type: Compliance Evaluation Pumps-RAS-WAS 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: 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? Comment: Are the tablets the proper size and type? 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? Comment: The flow meter is calibrated annually by ClearWater, Inc Yes No NA NE Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ▪ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ 1000-0016-6562 Yes No NA NE Gas • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ Yes No NA NE • ❑ OE • ❑ OE • ❑ ❑ ❑ Page# 7 Permit: NC0021156 Inspection Date: 05/11/2021 Owner - Facility: Mount Holly WWTP Inspection Type: Compliance Evaluation 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: At the time of the inspection the effluent appeared to be clear. Yes No NA NE • ❑ ❑ ❑ Aerobic Digester Yes No NA NE Is the capacity adequate? ■ ❑ ❑ ❑ Is the mixing adequate? • ❑ ❑ ❑ Is the site free of excessive foaming in the tank? • ❑ ❑ ❑ # Is the odor acceptable? • El ❑ El # Is tankage available for properly waste sludge? • ❑ ❑ ❑ Comment: Waste activated sludge is pumped into two (2) 750,000 gallon holding tanks equipped for storage and aeration. Bio-solids are land applied by a contracted company (Synagro) under the authority of Permit No. WQ0001863. Page# 8