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Home My WebLink AboutWQ0040918_Compliance Evaluation Inspection_20230412DocuSign Envelope ID: El164370-43D7-4509-8BCD-3D1DB8C5BB14 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 1 2 u 3 I NC0003450 111 121 23/04/12 I17 18 LC] I 19 I s I 20L] 21111I 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 1166 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 67 I 72 I ni I 71 I 74 79 I I I I I I I80 701a I 711 L L—I 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 Dermit Number) 10:10AM 23/04/12 18/12/01 Wallace Regional WWTP 851 Old Wilmington Rd Exit Time/Date Permit Expiration Date Wallace NC 28466 12:OOPM 23/04/12 23/01/31 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Lisa Hodges Cottle/ORC/910-665-2091/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Brent M Dean, /Public Services Director/910-285-2812/ No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenar Records/Reports Self -Monitoring Progran 0 Sludge Handling Dispo: Facility Site Review Effluent/Receiving Wate Other 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: Tom Tharrington DWR/WIRO WQ/ - - / Eotif S'"""V"X � 5/22/2023 Morella Sanchez -King DWR/WIRO WQ/910-796-7218/ E3ABA14A=C434... Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# DocuSign Envelope ID: El 164370-43D7-4509-8BCD-3D1 DB8C5BB1 4 NPDES yr/mo/day Inspection Type (Cont.) NC0003450 I11 12I 23/04/12 117 18 i c i Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Morella Sanchez King and Tom Tharrington, with the DWR Water Quality Regional Operations Section, inspected the facility on 04/12/2023 to document compliance with permit # NC003450. We appreciate Mrs. Lisa Cottle (ORC- Grade 4# 994036) who assisted during the visit and responded to our questions. The inspection consisted of records review and site visit and observation of the components of the system. Please refer to the question sections of this report for more details. The Wallace WWTF is permitted for 5.42 MGD. The average daily flow through the facility in the last three years has been less than 25% of the permitted flow (average annual flow - 1.3 MGD). Municipalities served at the WWTF include the Town of Wallace, Town of Burgaw, Town of Teachey, and Town of Greenevers. Treated effluent is discharged after UV disinfection to a segment of the Cape Fear River classified as "C". Permit NC003450 issued in October 2018 (expired) required the following: • A Mercury Minimization Plan, • Analyze total cadmium (ug/1) to its Practical Quantitation Limit (PQL) of less than 0.5 ug/l. • Analyze total silver (ug/1) to its Practical Quantitation Limit (PQL) of less than 1 ug/l. The Wallace-WWTF is compliant with these three requirements. The facility has scheduled improvements for 2023-2024 which include PLC upgrade, grit removal system upgrade, and SBR # 3 decanter installation and activation. Residuals are permitted under WQ0030998, Triple S farms handles the residuals. Records show that residuals are well managed and in compliance with the permit. Regarding the pretreatment program, a Notice of Violation (NOV) was issued to the facility due to the Town's failure to properly implement the Pretreatment Program. Specifically, the Town failed to initiate enforcement according to the Division -approved ERP due to the Town of Burgaw's unpermitted discharge and failure to submit a SIU application by the due dates. Records also indicate a low DO concentration presumably caused by a slug load from the Town of Burgaw on September 30 2022. Page# DocuSign Envelope ID: El164370-43D7-4509-8BCD-3D1DB8C5BB14 Permit: NC0003450 Owner -Facility: Wallace Regional WWTP Inspection Date: 04/12/2023 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? ■ ❑ ❑ ❑ # 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: The permit expired on 01/31/2023. The permitee submitted an application for permit renewal. The Water Quality Permitting Section acknowledged receipt of the renewal application on 01/23/2023. 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 ■ ❑ ❑ ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: The Wallace-WWTF is well maintained. For evaluation of the treatment process, staff use settleometer, MLSS, MVLSS, and microscope analysis as process control measures and correlations. On inspection day (04/12/2023) records indicated MLSS ranges between 1700 and 2200 mg/I. Record Keeping Yes No NA NE 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? ■ ❑ ❑ ❑ Page# 3 DocuSign Envelope ID: El164370-43D7-4509-8BCD-3D1DB8C5BB14 Permit: NC0003450 Inspection Date: 04/12/2023 Owner -Facility: Wallace Regional WWTP Inspection Type: Compliance Evaluation Record Keeping 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? Comment: Records were available for review and well organized. Flow Measurement - Influent # 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 ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: Influent and effluent flow meters were calibrated by John Glover and Associates in May 2022 and October 2022. Pump Station - Influent 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? Is SCADA telemetry available and operational? Is audible and visual alarm available and operational? Comment: All pumps were present on inspection day. 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 ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: Refrigerator was at YC during the inspection. Volume collected ranges bewteen 175-225 ml per sampling. Page# 4 DocuSign Envelope ID: El164370-43D7-4509-8BCD-3D1DB8C5BB14 Permit: NC0003450 Inspection Date: 04/12/2023 Influent Sampling Owner -Facility: Wallace Regional WWTP Inspection Type: Compliance Evaluation 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 Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ■ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: The generator was not tested on inspection day since the generator is tested for 30 minutes under load every Tuesdav at 2 PM. Grit Removal Type of grit removal Yes No NA NE a.Manual ❑ b.Mechanical Is the grit free of excessive organic matter? ❑ ❑ 0 ❑ Is the grit free of excessive odor? ❑ ❑ 0 ❑ # Is disposal of grit in compliance? ❑ ❑ 0 ❑ Comment: The facility has had continued issues with the cyclonic grit separator. An improved grit removal system is scheduled to be in operation by 06/30/2023. 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: Sequencing Batch Reactors Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE Page# 5 DocuSign Envelope ID: El164370-43D7-4509-8BCD-3D1DB8C5BB14 Permit: NC0003450 Owner -Facility: Inspection Date: 04/12/2023 Inspection Type: Wallace Regional WWTP Compliance Evaluation Sequencing Batch Reactors Yes No NA NE Type of operation: Duplex Is the reactor effluent free of solids? M ❑ ❑ ❑ Does minimum fill time correspond to the peak hour flow rate of the facility? ❑ ❑ ❑ Is aeration and mixing cycled on and off during fill? ❑ ❑ ❑ The operator understands and can explain the process? ❑ ❑ ❑ Comment: SBR reactor # 3 decanter installation and activation is scheduled to begin once the parts are received (estimated November 2023) and end construction 07/31/2024. Mrs. Cottle (ORC) explained the SBR process and provided related written information. The process consists of five phases: mix fill, react fill, react, settle, and, decant with programmed time or flow increments. Dissolved Oxygen is controlled trough the process in the range between 2-4 mq/l. Equalization Basins Yes No NA NE Is the basin aerated? ❑ ❑ 0 ❑ Is the basin free of bypass lines or structures to the natural environment? ■ ❑ ❑ ❑ Is the basin free of excessive grease? 0 ❑ ❑ ❑ Are all pumps present? 0 ❑ ❑ ❑ Are all pumps operable? 0 ❑ ❑ ❑ Are float controls operable? ❑ ❑ 0 ❑ Are audible and visual alarms operable? ❑ ❑ 0 ❑ # Is basin size/volume adequate? ❑ ❑ ❑ Comment: The equalization basin at the facility is post aeration Filtration (High Rate Tertiary) Yes No NA NE Type of operation: Cross flow Is the filter media present? ❑ ❑ 0 ❑ Is the filter surface free of clogging? ❑ ❑ ■ ❑ Is the filter free of growth? ❑ ❑ ■ ❑ Is the air scour operational? ❑ ❑ 0❑ Is the scouring acceptable? ❑ ❑ 0❑ Is the clear well free of excessive solids and filter media? ❑ ❑ ❑ Comment: Disinfection - UV Yes No NA NE Are extra UV bulbs available on site? 0 ❑ ❑ ❑ Page# 6 DocuSign Envelope ID: El164370-43D7-4509-8BCD-3D1DB8C5BB14 Permit: NC0003450 Inspection Date: 04/12/2023 Disinfection - UV 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? Owner -Facility: Wallace Regional WWTP Inspection Type: Compliance Evaluation Comment: Effluent after UV disinfection looked very clear and free of solids. 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: Influent and effluent flow meters were calibrated 2022 and October 2022. 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: The are 4 pumps in operation. Effluent Sampling Is composite sampling flow proportional? Is sample collected below all treatment units? Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ■ ❑ John Glover and Associates in Ma 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 the facility sampling performed as required by the permit (frequency, sampling type representative)? Yes No NA NE ❑ ❑ ❑ ■ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: Temperature at the sample storage unit was 20C on inspection day. Volume collected each sampling event ranks between 250-275 ml. Page# 7 DocuSign Envelope ID: El164370-43D7-4509-8BCD-3D1DB8C5BB14 Permit: NC0003450 Inspection Date: 04/12/2023 Effluent Sampling Owner -Facility: Wallace Regional WWTP Inspection Type: Compliance Evaluation Yes No NA NE Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, 0 ❑ ❑ ❑ and sampling location)? Comment: 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? ■ ❑ ❑ ❑ If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ 0 ❑ Comment: Other Yes No NA NE Comment: A Notice of Violation (NOV) was issued to the facility from the Pretreatment Compliance Inspection due to the Town's failure to properly implement the Pretreatment Program. Specifically, the Town failed to initiate enforcement according to the Division -approved ERP due to the Town of Burgaw's unpermitted discharge and failure to submit a SIU application by the due dates. Records also indicate a low DO concentration presumably caused by a slug load from the Town of Burgaw on September 30 2022. Page# 8