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Home My WebLink AboutNC0024333_Compliance Evaluation Inspection_20200129Roy COOPER Governor MICHAEL S. REGAN Secretary LINDA CULPEPPER Director Mr. Russell Colbath, PE Director of Water Resources City of Monroe Post Office Box 69 Monroe, NC 28111 Dear Mr. Colbath: NORTH CAROLINA Environmental Quality January 29, 2020 SUBJECT: Compliance Evaluation Inspection Monroe WWTP NPDES Permit NCO024333 Union County, NC On January 16, 2020, Roberto Scheller of this Office conducted a compliance inspection at the subject facility. This inspection was conducted as a Compliance Evaluation Inspection (CEI) to insure compliance with permit requirements and conditions. We wish to thank the operating staff for assistance regarding this inspection. The enclosed report should be self-explanatory; however, should you have any questions, please do not hesitate to contact myself or Roberto Scheller at (704) 235-2204 or roberto.scheller(aD_ncdenr.gov. Sincerely, EA DocuSigned by: 4.0(uw H P44-ft F161FB69A2D84A3... for W. Corey Basinger, Regional Supervisor Water Quality Regional Operations Section Division of Water Resources, NCDEQ Enclosure: CEI Report cc: Laserfiche Kyle Ketchum, ORC, email: kketchum(a)monroenc.org NORTH CAROHNA � D E Q North Carolina Department of Environmental Quality I Division of Water Resources Mooresville Regional Office 1 610 East Center Avenue, Suite 301 1 Mooresville, North Carolina 28115 o.namremor �w.c�giuuei� /`� 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 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 IF I 3 I NCO024333 111 12 I 20/01/16 I17 18 I S I 19 I G I 201 I 211111 I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I II I I I I I f6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 671 70I�_71 I 72 r 73I i74 751 I I I I 80 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 oermit Number) 10:04AM 20/01/16 14/09/01 Monroe WWTP 775 Treeway Dr Exit Time/Date Permit Expiration Date Monroe NC 28110 12:24PM 20/01/16 19/01/31 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Kyle P Ketchum/ORC/704-282-4612/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Russell G Colbath,PO Box 69 Monroe NC 28111/Water Resources Director/704-282-4624/7042825764 No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Flow Measurement Operations & Maintenance Records/Reports Self -Monitoring Program 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 DocuSigned by: Roberto Scheller S.", DWR/MRO WQ/252-946-6481/ 1/28/2020 E91C2A007838943E.- Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers DocuSigned by: Date W. Corey Basinger DWR/Division of Water Quality/704-235-2194/ A4-4 w H N " for WCB 1. 29. 2020 1`161 FB69AMUA3... EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# NPDES yr/mo/day Inspection Type NCO024333 I11 121 20/01/16 117 18 JCJ Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# Permit: NCO024333 Owner - Facility: Monroe WWTP Inspection Date: 01/16/2020 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 0 ❑ ❑ ❑ application? Is the facility as described in the permit? 0 ❑ ❑ ❑ # Are there any special conditions for the permit? 0 ❑ ❑ ❑ Is access to the plant site restricted to the general public? 0 ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? 0 ❑ ❑ ❑ Comment: Permit renewal received by Division July 31. 2018. Permit became effective September 1 2014 and expired on January 31, 2019. Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? 0 ❑ ❑ ❑ Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable 0 ❑ ❑ ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Facility appeared to be well operated and maintained. Sample analysis is performed by on -site laboratory certification #206, Shealy Environmental Services (Certification #329). Chronic Toxicity analysis performed by ETS. Process control, operation records, ORC log, eDMR's, labatory analysis and COC's were reviewed. Pump Station - Effluent Is the pump wet well free of bypass lines or structures? 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: Facility has two influent pump stations with a total of six influent pumps. 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Page# 3 Permit: NCO024333 Inspection Date: 01/16/2020 Equalization Basins # Is basin size/volume adequate? Owner - Facility: Monroe WWTP Inspection Type: Compliance Evaluation Yes No NA NE ■ ❑ ❑ ❑ Comment: At time of inspection the equalization basin was inspected for erosion, burrowing animals and trees. Earthen berm appeared to be well vegetated and maintained. No erosion of burrowing animals was noted on berm at time of inspection. A few saplings have taken growth on berm. Bar Screens Yes No NA NE Type of bar screen a.Manual ❑ b.Mechanical Are the bars adequately screening debris? 0 ❑ ❑ ❑ Is the screen free of excessive debris? 0 ❑ ❑ ❑ Is disposal of screening in compliance? 0 ❑ ❑ ❑ Is the unit in good condition? 0 ❑ ❑ ❑ Comment: Facility has two rotary fine screens. Screenings are transfered to dumpster via augers with finial disposal in landfill. Influent Sampling Yes No NA NE # Is composite sampling flow proportional? 0 ❑ ❑ ❑ Is sample collected above side streams? 0 ❑ ❑ ❑ Is proper volume collected? 0 ❑ ❑ ❑ Is the tubing clean? E ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees 0 ❑ ❑ ❑ Celsius)? Is sampling performed according to the permit? 0 ❑ ❑ ❑ Comment: At time of inspection influent sampler temperature was recorded 3 degrees Celsius. 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? Yes No NA NE Ext. Air Diffused ■ ❑ ❑ ❑ ❑ ❑ ■ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Page# 4 Permit: NCO024333 Owner - Facility: Monroe WWTP Inspection Date: 01/16/2020 Inspection Type: Compliance Evaluation Aeration Basins Yes No NA NE Is the DO level acceptable? ❑ ❑ ❑ Is the DO level acceptable?(1.0 to 3.0 mg/1) ❑ ❑ ❑ Comment: 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? 0 ❑ ❑ ❑ Is the site free of weir blockage? 0 ❑ ❑ ❑ 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? 0 ❑ ❑ ❑ 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'/4 of the sidewall depth) ❑ ❑ 0 ❑ Comment: At time of insDection sludae blanket was checked in one of four secondary clarifiers and was recorded at approximately 1 foot. Pumps-RAS-WAS Yes No NA NE Are pumps in place? 0 ❑ ❑ ❑ Are pumps operational? 0 ❑ ❑ ❑ Are there adequate spare parts and supplies on site? S ❑ ❑ ❑ Comment: Filtration (High Rate Tertiary) Type of operation: Is the filter media present? Is the filter surface free of clogging? Is the filter free of growth? Is the air scour operational? Is the scouring acceptable? Is the clear well free of excessive solids and filter media? Yes No NA NE Down flow ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Page# 5 Permit: NCO024333 Owner - Facility: Monroe WWTP Inspection Date: 01/16/2020 Inspection Type: Compliance Evaluation Filtration (High Rate Tertiary) Yes No NA NE Comment: Filter backwashing at time of inspection. 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? ❑ ❑ ❑ Is the contact chamber free of growth, or sludge buildup? 0 ❑ ❑ ❑ Is there chlorine residual prior to de -chlorination? 0 ❑ ❑ ❑ Does the Stationary Source have more than 2500 Ibs of Chlorine (CAS No. 7782-50-5)? 0 ❑ ❑ ❑ If yes, then is there a Risk Management Plan on site? ❑ ❑ ❑ ❑ If yes, then what is the EPA twelve digit ID Number? (1000- - ) 1000 001 10435 If yes, then when was the RMP last updated? 03/15/2018 Comment: De -chlorination Yes No NA NE Type of system ? Is the feed ratio proportional to chlorine amount (1 to 1)? ❑ ❑ ❑ Is storage appropriate for cylinders? 0 ❑ ❑ ❑ # Is de -chlorination substance stored away from chlorine containers? 0 ❑ ❑ ❑ Comment: Are the tablets the proper size and type? ❑ ❑ 0 ❑ Are tablet de -chlorinators operational? ❑ ❑ 0 ❑ Number of tubes in use? Comment: Effluent Sampling Yes No NA NE Is composite sampling flow proportional? 0 ❑ ❑ ❑ Is sample collected below all treatment units? 0 ❑ ❑ ❑ Is proper volume collected? 0 ❑ ❑ ❑ Is the tubing clean? 0 ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees 0 ❑ ❑ ❑ Celsius)? Page# 6 Permit: NCO024333 Inspection Date: 01/16/2020 Owner - Facility: Monroe WWTP Inspection Type: Compliance Evaluation Effluent Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type 0 ❑ ❑ ❑ representative)? Comment: Facility is equipped with two effluent composite samplers. At time of inspection effluent sampler #1 was recrded at 3.6 degrees Celsius and sampler #2 was recorded at 1 degree Celsius. Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? 0 ❑ ❑ ❑ Is flow meter calibrated annually? 0 ❑ ❑ ❑ Is the flow meter operational? 0 ❑ ❑ ❑ (If units are separated) Does the chart recorder match the flow meter? 0 ❑ ❑ ❑ Comment: At time of inspection effluent flow as noted at 5.9 MGD. Effluent was clear with no visible suspended solids. Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? 0 ❑ ❑ ❑ Are the receiving water free of foam other than trace amounts and other debris? 0 ❑ ❑ ❑ If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ 0 ❑ Comment: Facility has cascading step aeration before discharging into Richardson Creek. Small amounts of foam was being generated at point of discharge but disipated within 60-80 feet downstream. Aerobic Digester Yes No NA NE Is the capacity adequate? 0 ❑ ❑ ❑ Is the mixing adequate? 0 ❑ ❑ ❑ Is the site free of excessive foaming in the tank? 0 ❑ ❑ ❑ # Is the odor acceptable? 0 ❑ ❑ ❑ # Is tankage available for properly waste sludge? 0 ❑ ❑ ❑ Comment: Facility has 2 sludge thickner tanks and 3 aerobic digester. Solids Handling Equipment Yes No NA NE Is the equipment operational? 0 ❑ ❑ ❑ 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 ❑ ❑ ❑ Page# 7 Permit: NC0024333 Inspection Date: 01/16/2020 Solids Handling Equipment Owner - Facility: Monroe WWTP Inspection Type: Compliance Evaluation Yes No NA NE Is the site free of excessive moisture in belt filter press sludge cake? 0 ❑ ❑ ❑ The facility has an approved sludge management plan? 0 ❑ ❑ ❑ Comment: Belt thickner was in operation at time of inspection producing a thick, dry looking sludge cake. Large amounts of dewater sludge is exposed to the weather in sludge holding area. It is recommended that sludge holding area be covered to keep sludge dry and reduce disposal weight. Sludge is being taken to landfill for final disposal. Drying Beds Is there adequate drying bed space? Is the sludge distribution on drying beds appropriate? Are the drying beds free of vegetation? # 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: Drying beds are being used as storage for dewatered sludge. 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: Yes No NA NE ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ ■ ■ ❑ ❑ ❑ 1[-Ts►rem ►/_m►1M ■ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ ■ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Page# 8