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Home My WebLink AboutNC0026441_NOV-2022-PC-0246_20220428 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F �o STAT,.cty'1 ROY COOPER = 1 Governor ELIZABETH S.BISER ` �_' Secretary 4.`, uAmv^°"== RICHARD E.ROGERS,JR. NORTH CAROLINA Director Environmental Quality Certified Mail# 7017 2680 0000 2237 2805 Return Receipt Requested April 28, 2022 Roy Lynch, Town Manager Town of Siler City PO Box 769 Siler City,NC 27344 Subject: Compliance Sampling Inspection (CSI) NOTICE OF VIOLATION & INTENT TO ASSESS CIVIL PENALTY Tracking Number: NOV-2022-PC-0246 Permit No. NC0026441 Siler City WWTP Chatham County Dear Mr. Lynch: On March 9, 2022, Cheng Zhang, and Alys Hannum with the Raleigh Regional Office (RRO) of the Division of Water Resources (DWR), conducted a compliance sampling inspection of the subject facility. The assistance of Ms. Britany York, the WWTP Superintendent and Operator in Responsible Charge (ORC), and Ms. Bobbie Hill, the backup ORC and laboratory supervisor,was greatly appreciated during the inspection. Observations during the inspection are summarized below, as well as an inspection checklist is attached for your records. Siler City WWTP is permitted to discharge at a rate of 4.0 MGD and consists of: automatic and manual bar screens, grit collection unit, influent pump station, influent equalization basin(Zone 2), dual oxidation ditches with surface jet aeration, flow splitter box, alum feed station, lime feed station, dual secondary clarifiers, dual aerobic digesters, sludge transfer station, dissolved air flotation(DAF) unit (Used as needed), sludge thickener basin, influent equalization or sludge storage basins (Zone 3 A & B used as needed), four tertiary filters, filter backwash basin, gaseous chlorine disinfection, chlorine contact chamber, gaseous sulfur dioxide dechlorination, and step-aeration. The facility discharges into Loves Creek, which is classified C waters in the Cape Fear Basin. 1. The current permit was modified on April 30, 2019 and expired on May 31, 2019. A draft permit was published on March 31, 2022 for public comments. 2. Basinwide Information Management System(BIMS) classifies the facility as a WW-4 Wastewater Treatment Plant. Britany York is listed as the Operator in Responsible Charge (ORC). Bobbie Hill and Chris McCorquodale are listed as Back-up Operator in Responsible Charge (Back-up ORC). 3. At the time of inspection, all listed treatment units were in operable conditions with a few exceptions: the DAF unit has not been used in the past years; EQ basin 4A was not used to hold wasted sludge; one recirculation pump at oxidation ditch#1 was taken offline for repair. Wasted North Carolina Department olf Environmental Quality I Division of Water Resources i . •••/// Raleigh Regional Office I 3800 Barrett Drive I Raleigh,North Carolina 27609 NORTH CAROLINAD_ 919.791.4200 newhnea of Environmental opal /"� DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F activated sludge was treated in the two aerobic digesters and two EQ basins, and thickened in the sludge thickener basin. A portable belt press unit (rented from Synagro) was in operation on site to dewater sludge from the thickening basins. The inspectors noted the following: • Dissolved oxygen (DO) level in both oxidation ditches was lower than needed: 0.92 mg/L and 0.34 mg/L in ditch #1; 0.67 mg/L and 0.24 mg/L in ditch #2 (readings from four inline DO meters). A floating aerator was in operation at Ditch #1. Mix liquor suspended solids was 5800 mg/L (March 8, 2022). • Sludge blankets at two secondary clarifiers were high, 8 feet for clarifier #1 and 9 feet for clarifier #2. • EQ basins 3A and 3B were full with sludge; Digester A and B both had about 3 feet of freeboard. EQ basin 4A was empty. Two sludge thickening basins had about 1/4 space left. 4. Records Review: Discharge Monitoring Report records for January 2022 and July of 2021 were reviewed with lab bench sheets and no transcription errors were noted. Chain of Custody forms are completed and kept on site. A daily operation log book is maintained and kept on site. Records are maintained for at least three years. 5. The laboratory on site is certified to analyze conventional parameters (Lab Certification No. 132). Toxicity and metals are sent to a contract lab for analysis. A cursory review of the laboratory noted all pH buffer stock was within expiration dates. Field meter calibration were performed as required. The sample refrigerator, as well as the fecal and BOD incubators, were all found to be compliant with temperature requirements. 6. The right of way to the discharged point is maintained. The effluent was clear and free of foam. No visible impacts were noted immediately downstream of the discharge point. 7. As part of the CSI, influent and effluent composite samples collected using the facility's samplers were split into two portions and analyzed for permit required parameters by Siler City WWTP laboratory, NC DWR laboratory, and a contract laboratory (Meritech, Inc.). The inspector also collected a grab effluent sample for analysis of fecal coliform at DWR laboratory. Field parameters were analyzed by facility staff. Effluent Parameter Sample Type Permit Limit (Weekly average) Result BOD Composite 15 mg/L 22 mg/L TSS Composite 45 mg/L 8.8 mg/L Ammonia Composite 3 mg/L 9.2 mg/L TKN Composite Not limited; monitoring only 12 mg/L Nitrate+Nitrite Composite Not limited; monitoring only 0.83 mg/L Total Nitrogen Composite Not limited; monitoring only 12.83 mg/L Total Phosphorous Composite 0.5 mg/L (Quarterly average) 0.15 mg/L Cadmium Composite 15.5 µg/L (Daily maximum) <0.5 µg/L Fecal coliform Grab 400 CFU /100 ml 2600 CFU /100 ml DE NORTH CAROLINA gaparhneM ofEnvironmental quay North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611 919.707.9000 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F Influent Parameter Sample Type Permit Limit (Weekly average) Result BOD Composite Not limited; monitoring only 340 mg/L TSS Composite Not limited; monitoring only 252 mg/L Field Parameters (Effluent Parameter Sample Type Permit Limit Result Temperature Grab Not limited; monitoring only 18.0 °C pH Grab 6-9 7.7 Total residual chlorine Grab 17 µg/L <10 µg/L Dissolved oxygen Grab >6 mg/L 10.0 mg/L Sampling results show that effluent BOD, ammonia nitrogen, and Fecal coliform were higher than the weekly average limits; high TKN and low nitrate/nitrite indicate poor nitrification. At the time of inspection, the treatment plant was recovering from an upset happened in previous months. The treatment plant upset started in January 2022 caused by equipment failure (blowers to the oxidation ditches, and tertiary filters). During the process to repair the blowers, aeration in the oxidation ditches were reduced or even turned off, resulting in breakdown of biological treatment process. Tertiary filters were also taken offline for unscheduled maintenance. Situation got worse in early February due to flow from the Town's Water Treatment Plant (WTP) and Mountaire Farm. Flow from the WTP (mixture of backwash water and sludge) contained high level of iron (Facility staff observed high concentration of iron (375 mg/L) in influent on March 6, 2022). Mountaire Farm failed to notify the facility staff of chemical change (switch to peroxide from bleach). The combination of flow from the WTP and Mountaire Farm caused complete die -off of microorganisms in the oxidation ditches and mixed liquor turned septic. Facility staff managed to recover from the upset by wasting toxic sludge out of the system and introducing manufactured microorganisms. The recovery process was interrupted in mid of March by two high flow events during which the facility staff had to turn aeration off to prevent bulking of the clarifiers or washout of biosolids from the oxidation ditches. Facility staff stated that a portion of the jet aerators at the oxidation ditches were not functioning and they would be able to take either ditches offline for necessary repair only after a new oxidation ditch is constructed as part of the plant upgrade plan. The floating aerator added to ditch #1 helps improve the aeration to a certain extent, the facility may need to add more floating aerators to the oxidation ditches before being able to repair the inoperable jet aerators. Town of Siler City was found to have violated Part II, Section C, 2 of its NPDES permit for failure to proper operate and maintain the wastewater treatment plant by failure to provide sufficient aeration for the biological treatment process. A Notice of Violation/Intent to Issue Civil Penalty is being issued for the noted violation of North Carolina General Statute (G.S.) 143 215.1 and the facility's NPDES Permit. Pursuant to G.S. 143 215.6A, a civil penalty of not more than twenty-five thousand dollars ($25,000.00) may be assessed against any person who violates or fails to act in accordance with the terms, conditions, or requirements of any permit issued pursuant to G.S. 143 215.1. LD_E NORTH CAROLINA gaparhnanl of Environmental quality North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611 919.707.9000 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F This office requests that you respond to this Notice, in writing, within ten (10) business days after receipt. A review of your response will be considered along with any additional information. You will then be notified of any civil penalties that may be assessed regarding the violations. If no response is received in this Office within the 10-day period, a civil penalty assessment may be prepared. Remedial actions should have already been taken to correct this problem and prevent further occurrences in the future. The Division of Water Resources may pursue enforcement action for this and any additional violations of State law. If the violations are of a continuing nature, not related to operation and/or maintenance problems, and you anticipate remedial construction activities, then you may wish to consider applying for a Special Order by Consent. If you have any questions concerning this matter or to apply for an SOC, please contact Cheng Zhang of the Raleigh Regional Office at 919-791-4200. Attachments: Compliance Inspection Report EPA Sampling Inspection Checklist Cc: (Laserfiche) Raleigh Regional Office w/attachment Britany York, ORC (electronic copy only) D_E NORTH CARCLINA gaparhnanl of Environmental quality Sincerely, DocuSigned by: LL/&tssa , A4-40 AALL B2916E6AB32144F... Vanessa E. Manuel, Assistant Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611 919.707.9000 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F 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 1 IN Code I 2 IL NPDES yr/mo/day Inspection Type Inspector Fac I 3 I NC0026441 111 121 22/03/09 117 181 I 191 S I 2011 Type 21IIIIII IIIIIIIIIIIIIIIIII I IIIIII IIIIIIIIIII P6 Inspection 671 Work Days Facility Self -Monitoring I 7° I Evaluation Rating I 711 B1 1 72 QA I N I 73I 1 I I Reserved 74 71 I I I I I I 180 Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include POTW name and NPDES Dermit Number) Siler City WWTP 370 Waste Treatment Plant Rd Siler City NC 27344 Entry Time/Date 09:OOAM 22/03/09 Permit Effective Date 19/05/01 Exit Time/Date 12:OOPM 22/03/09 Permit Expiration Date 19/05/31 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Brittany York/Superintendent WWTP/919-742-4581 / Brittany Nicole York/ORC/919-742-4581/ Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Chris McCorquodale,311 N Second Ave Siler City NC 27344//919-742-4732/ 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 Storm Water Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) (See attachment summary) Name(s) and Sig Cheng Zhang Alys K Hannum P$04derG¢ttector(s) Agency/Office/Phone and Fax Numbers Date -a�4. 4/28/2022 DWR/RRO WQ/919-791-4200/ D6171508E1EC41F.�D000signedby: DWR/RRO WQ/919-791-4255/ 4/29/2022 4C221170C5AAO4F3... Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date tiDocuSigned by: / atA.t,SSa f. ektiA.lit ml, 4/29/2022 �B 916E6AB32144F EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# 1 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F 31 NPDES yr/mo/day N C0026441 111 121 22/03/09 I17 Inspection Type 18i i (Cont.) 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Influent and effluent composite samples collected using facility's automatic samplers were split for analysis by facility's inhouse laboratory and contract laboratory, and by DWR Central Laboratory. A grab sample was collected for fecal coliform analysis. Field parameters were measured by facility staff, analytical results were summarized as follows: Effluent Composite BOD 22 mg/L TSS 8.8 mg/L Ammonia 9.2 mg/L TKN 12 mg/L Nitrate+Nitrite 0.83 mg/L Total Nitrogen 12.83 mg/L Total Phosphorous 0.15 mg/L Cadmium <0.5 ug/L Effluent Grab Fecal coliform Grab 2600 CFU /100 ml Influent Composite BOD Composite 340 mg/L TSS Composite 252 mg/L Field Parameters (Effluent) Temperature 18.0 °C pH 7.7 Dissolved oxygen 10.0 mg/L Facility staff stated that the plant was upset by slug load of sludge from the Town's water treatment plant through the Town's sewer collection system in February 2022. Facility staff observed high concentration of iron (375 mg/L) in influent on March 6, 2022, which indicated dumping of sludge from the water plant. The facility also experienced blower issues in February 2022 resulting in periods without aeration at the oxidation ditches. At the time of inspection, all blowers were operational, however, DO level in the ditches was lower than needed. Facility staff stated that some of the jet aerators were not functioning and they could not aford to take either ditches offline for repair. The floating aerator in Ditch #1 helped to a certain extent. Before the oxidation ditches can be taken offline for repair, perhaps more floating aerators are needed to provide sufficient aeartion in the ditches. Page# 2 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F Permit: NC0026441 Owner - Facility: Siler City WWTP Inspection Date: 03/09/2022 Inspection Type: Compliance Sampling 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 II ❑ ❑ ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Facility analyzes MLSS, MCRT, settleable solids, pH, DO, and sludge blankets for process control. 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: Current permit expired on May 31, 2021. Draft permit was published on March 31, 2022 for public comments. 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? Comment: Calibrated quarterly, last calibrated on 11/10/2021. 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: Four pumps pump to oxidation ditches or equaliztion basins. Equalization Basins Is the basin aerated? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ ▪ ❑ ❑ ❑ Yes No NA NE ▪ ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ Page# 3 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F Permit: NC0026441 Owner - Facility: Siler City WWTP Inspection Date: 03/09/2022 Inspection Type: Compliance Sampling Equalization Basins Yes No NA NE 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? II El El El • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: Five EQ basins, Zone 1 receives overflow from pump station wetwell, Zone 2 basin was in use. Zone 3A, 3B were used to hold wasted sludge, Zone 4 was not in use. 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: Grit Removal 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: Influent Sampling # Is composite sampling flow proportional? Is sample collected above side streams? Is proper volume collected? Yes No NA NE • • • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE El • Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 4 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F Permit: NC0026441 Owner - Facility: Siler City WWTP Inspection Date: 03/09/2022 Inspection Type: Compliance Sampling Influent Sampling 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: Oxidation Ditches Are the aerators operational? Are the aerators free of excessive solids build up? # 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? Are settleometer results acceptable (> 30 minutes)? Is the DO level acceptable?(1.0 to 3.0 mg/I) Are settelometer results acceptable?(400 to 800 ml/I in 30 minutes) Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ Comment: One of three recirculation pumps was taken out for repair. A floating aerator was in operation in Ditch #1, which improved DO in the ditch. Do level in both ditches was less than 1 mg/L. 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? 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: Sludge blanket was 8 feet in Clarifier #1, and 9 feet in Clarifier #2. Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ • ❑ ❑ Pumps-RAS-WAS Yes No NA NE Page# 5 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F Permit: NC0026441 Owner - Facility: Siler City WWTP Inspection Date: 03/09/2022 Inspection Type: Compliance Sampling Pumps-RAS-WAS Are pumps in place? Are pumps operational? Are there adequate spare parts and supplies on site? Comment: Yes No NA NE • ❑ ❑ ❑ Chemical Feed Yes No NA NE Is containment adequate? • ❑ ❑ ❑ Is storage adequate? • ❑ ❑ ❑ Are backup pumps available? • ❑ ❑ ❑ Is the site free of excessive leaking? • ❑ ❑ ❑ Comment: Facility feeds alum for phosphorous removal and polymer for cadmium removal. Nutrient Removal Yes No NA NE # Is total nitrogen removal required? ❑ • ❑ ❑ # Is total phosphorous removal required? • ❑ ❑ ❑ Type Chemical # Is chemical feed required to sustain process? • ❑ ❑ ❑ Is nutrient removal process operating properly? • ❑ ❑ ❑ Comment: Facility feeds alum for phosphorous removal. Filtration (High Rate Tertiary) Yes No NA NE Type of operation: Down flow Is the filter media present? ❑ ❑ ❑ ❑ Is the filter surface free of clogging? El ❑ ❑ ❑ Is the filter free of growth? El El El El Is the air scour operational? ❑ ❑ ❑ ❑ Is the scouring acceptable? El El El El Is the clear well free of excessive solids and filter media? El El ❑ ❑ Comment: Four filters. Backwash at head loss of 10'. Disinfection -Gas Are cylinders secured adequately? Are cylinders protected from direct sunlight? Yes No NA NE Page# 6 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F Permit: NC0026441 Owner - Facility: Siler City WWTP Inspection Date: 03/09/2022 Inspection Type: Compliance Sampling Disinfection -Gas 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? Are the tablets the proper size and type? Comment: Sulfur dioxide gas is used for de -chlorination. Are tablet de -chlorinators operational? Number of tubes in use? Comment: Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ▪ ❑ ❑ ❑ 04/29/2016 Yes No NA NE Gas • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ Effluent Sampling Yes No NA NE Is composite sampling flow proportional? • ❑ El El Is sample collected below all treatment units? • ❑ ❑ ❑ Is proper volume collected? • ❑ ❑ ❑ Is the tubing clean? • El El 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: Page# 7 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F Permit: NC0026441 Owner - Facility: Siler City WWTP Inspection Date: 03/09/2022 Inspection Type: Compliance Sampling 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: Calibrated quarterly, last calibrated on 11/10/2021. 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? Comment: EQ basins 3A and 3B were full with sludge; Digester A and freeboard. EQ basin 4A was empty. Two sludge thickening left. Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ B both had about 3 feet of basins had about 1/4 space Solids Handling Equipment Is the equipment operational? Is the chemical feed equipment operational? Is storage adequate? 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? The facility has an approved sludge management plan? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: Dissolved air flotation (DAF) unit has not been used for a long time. A portable belt press was in operation at the time of inspection, two and half truck load of dewatered sludge was hauled away daily. Record Keeping Yes No NA NE Page# 8 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F Permit: NC0026441 Owner - Facility: Siler City WWTP Inspection Date: 03/09/2022 Inspection Type: Compliance Sampling 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 ❑ El • El 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? • ❑ ❑ ❑ Comment: Laboratory Yes No NA NE Are field parameters performed by certified personnel or laboratory? ■ ❑ ❑ ❑ Are all other parameters(excluding field parameters) performed by a certified lab? • El El El # Is the facility using a contract lab? • El El El # 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? • El El El Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? • El El El Comment: Standby Power Yes No NA NE Page# 9 DocuSign Envelope ID: F3BEDFCF-02EC-443C-923F-0541917E2F4F Permit: NC0026441 Owner - Facility: Siler City WWTP Inspection Date: 03/09/2022 Inspection Type: Compliance Sampling 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 generator has to be activated manually. The generator has capacity to operate the influent pump station and mechnical bar screen. Standby power will be upgraded in the upcoming plant upgrade. Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, El ❑ and sampling location)? Comment: Town of Siler City is a member of Upper Cape Fear River Basin Association. Page# 10 DocuSign Envelope ID: 3CDBFFOD-7566-4034-BA55-86EF7DB929CC PERMITTEE SAMPLING INSPECTION CHECKLIST Owner / Facility Names: Siler City WWTP NPDES Permit #: NC0026441 County: Chatham Inspection Date: 3/9/2022 Y N N/A NE A. PERMITTEE SAMPLING EVALUATION 1. Take samples at sites specified in the permit. 2. Locations adequate for representative samples. 3. Flow proportioned samples obtained when required by the permit. 4. Complete sampling and analysis on parameters specified by the permit. 5. Conduct sampling and analysis in frequency specified by the permit. 6. Permittee uses the method of sample collection required by the permit. Required method: composite and grab If not, method being used is: ( ) Grab; ( ) Manual Composite; ( ) Automatic Composite 7. Sample collection procedures adequate: a. Samples refrigerated during compositing. b. Proper preservation techniques used. c. Containers and sample holding times before analyses conform to 40 CFR 136.3. d. Samples analyzed in timeframe needed. 8. Facility performs monitoring and analyses more often than required by the permit. If so, results reported in the permittee's self -monitoring report. 9. Samples contain chlorine. 10. Use contract laboratory for sample analysis. 11. POTW collects samples from industrial users in pretreatment program. B. SAMPLING INSPECTION PROCEDURES AND OBSERVATIONS 12. Obtain grab samples. 13. Obtain composite sample. Sample frequency: Daily Preservation: 14. Sample refrigerated during compositing? 15. Flow -proportioned sample collected. 16. Sample obtained from facility sampling device. 17. Sample representative of volume and nature of discharge. 18. Sample split with permittee. 19. Employ chain -of -custody procedures. 20. Samples collected in accordance with the permit. 21. Observe excessive foam, grease, floating solids at the outfall. C. AUTOMATIC SAMPLER PROCEDURES AND OBSERVATIONS 22. Sample intake tubing placed in a well -mixed, representative location (0.4 to 0.6 depth). 23. Individual aliquot volume checked and at least 100 ml aliquot collected. • 0 0 0 • 0 0 0 O 000 O 000 O 000 0 0 0 0 O 0 0 0 O 000 O 000 O 0 0 0 O 0 0 0 O 000 O 000 • 0 0 0 O 0 0 0 • 0 0 0 0 0 0 0 0 0 0 0 O 0000000 O 0000000 O 0000000 O 0 0 0 0 0 0 0 Page 1 of 2 DocuSign Envelope ID: 3CDBFFOD-7566-4034-BA55-86EF7DB929CC Y N N/A NE 24. Proper sample tubing (TeflonTM for organics, otherwise Tygon®) and tubing with inner diameter at least 0.25 inches. 25. Proper composite sample container (glass for organics, otherwise plastic). 26. Proper refrigeration (5 6 deg. Centigrade or ice), with required documentation. 27. Proper wastewater velocity in the sample tubing (at least 2 feet per second). D. EFFLUENT CHARACTERISTICS FOR ANALYSIS ® 0 0 0 ® 0 0 0 O 0 0 0 ® 0 0 0 E. COMMENTS INSPECTOR: Cheng Zhang, Alys Hannum DocuSigned by: SIGNATU D6171508E1 EC41 F... Ca DocuSigned by: 4C22170C5AA04F3... Page 2 of 2