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Home My WebLink AboutNC0024872_Compliance Evaluation Inspection_20210506ROY COOPER Governor DIONNE DELLI—GATTI Secretary S. DANIEL SMITH Director Johnny Lambert Director of Public Utilities Davie County Water System 298 East Depot Street, Suite 200 Mocksville, NC, 27028 NORTH CAROLINA Environmental Quality May 6, 2021 SUBJECT: Compliance Evaluation Inspection Cooleemee WWTP NPDES Permit No. NC0024872 Davie County Dear Mr. Lambert, On March 23, 2021, Tricia Lowery, Jordan Burbage, and Gary Hudson, of this office, met with Tim Smith, Operator in Responsible Charge (ORC), to perform a Compliance Evaluation Inspection at the Cooleemee Wastewater Treatment Plant. This type of inspection consists of two basic parts: an in -office file review and an on -site inspection of the treatment facility. The attached EPA inspection form details the areas that were evaluated during this inspection. The inspection of the facility was satisfactory. If you have any questions regarding the inspection or this report, please contact Gary Hudson or me at (336) 776-9800 or by email at gary.hudson@ncdenr.gov or lon.snider@ncdenr.gov. Sincerely, Docu Signed by: %n. l . n.lAts' 145B49E225C94EA... Lon Snider Regional Supervisor Water Quality Regional Operations Division of Water Resources Attachments: EPA Water Compliance Inspection Report cc: WSRO LD_E NORTH CAROLINA Department of Environmental qua[ North Carolina Department of Environmental Quality j Division of Water Resources Winston-Salem Regional Office 1450 West Hanes Mill Road, Suite 300 I Winston-Salem, North Carolina 27105 336.776.9800 United States Environmental Protection Agency E PA 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 NC0024872 111 121 21/03/23 117 Type 1810I IIIIIIIIIII Inspector Fac Type 19I S I 2011 IIIIIIIIIII IIIIIII I IIIIII P6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA Reserved 671 I 70I I 711 172 I N I 73I 1 74 71 I I 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) Cooleemee WWTP NC Hwy 801 S Cooleemee NC 27014 Entry Time/Date 10:OOAM 21/03/23 Permit Effective Date 15/07/01 Exit Time/Date 12:OOPM 21/03/23 Permit Expiration Date 20/06/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Timothy Lamar Smith/ORC/336-284-6680/ Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Johnny Lambert,261 Chaffin St Mocksville NC 27028//336-753-6090/ 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) of Inspector(s) Agency/Office/Phone and Fax Numbers Date Gary Hudson DWR/Division of Water Quality/336-776-9694/ Signature of Managmeigned yn16Q A Reviewer Agency/Office/Phone and Fax Numbers Date �Doc : Lo, T. J,Ndcr 5/6/2021 EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# 1 31 NPDES yr/mo/day NC0024872 111 121 21/03/23 117 Inspection Type 18 [j (Cont.) 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) *The current NPDES permit expired on June 30, 2020. A renewal application has been submitted, but the issuance of the new permit has been delayed. *On November 13, 2020, Tropical Storm Eta caused severe flooding and extensive damage to the entire plant as well as the influent pump station. *The following process control tests are performed by plant personnel: 30-minute settleability, MLSS, MLVSS, and dissolved oxygen. *Please be advised that the ORC or a designated Back-up ORC must visit the WWTP Monday thru Friday, 5-days per week excluding weekends and holidays. *Most of the records prior to December have been destroyed by the flood. The January DMR was compared to the lab results data that was sent from the contract lab. No discrepancies were noted. *The Influent Pump Station has been bypassed since the November flood. Contractors have been working continuously to replace the damaged components. *The mechanical bar screen has been bypassed due to the bypass pumping configuration. *The WWTP has two secondary clarifiers. Both were in operation and appeared to be very well maintained. The effluent in the weir troughs appeared to be very clear at the time of the inspection. *The extended aeration basin appeared to be operating properly. The basin has two mixers and two mechanical aerators. The mixers and aerators alternate with each other and run every other 30-minutes. The D.O. probe at the time of the inspection was reading 2.4 mg/I. *The flow meter was calibrated on October 22, 2020. *The right-of-way to the outfall pipe was clear and very well maintained. The effluent pipe was submerged during the time of the inspection. *The County has purchased a new effluent composite sampler. There was a thermometer laying on the floor of the refrigerator that was not NIST certified. Please be advised that a NIST certified thermometer placed in a liquid must be located in the sampler refrigerator and must be calibrated annually with proof of calibration readily available for inspection. *The replacement sampler was on back order at the time or the inspection. The operator collects hourly grab samples. Page# 2 Permit: NC0024872 Inspection Date: 03/23/2021 Owner - Facility: Cooleemee WWTP Inspection Type: Compliance Evaluation Permit (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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: The current NPDES permit expired on June 30, 2020. A renewal application has been submitted, but the issuance of the new permit has been delayed. 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? Yes No NA NE Comment: On November 13, 2020, Tropical Storm Eta caused severe flooding and extensive damage to the entire plant as well as the influent pump station. The following process control tests are performed by plant personnel: 30-minute settleability MLSS, MLVSS, and dissolved oxygen. Please be advised that the ORC or a designated Back-up ORC must visit the WWTP Monday thru Friday, 5-days per week excluding weekends and holidays. 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • • • • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 3 Permit: NC0024872 Inspection Date: 03/23/2021 Owner - Facility: Cooleemee WWTP Inspection Type: Compliance Evaluation Record Keeping Yes No NA NE (If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified operatc 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? ❑ ❑ ■ ❑ ▪ El El El • ❑ ❑ ❑ ▪ El El El Comment: Most of the records prior to December have been destroyed by the flood. The January DMR was compared to the lab results data that was sent from the contract lab. No discrepancies were noted. 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? ❑ • ❑ ❑ Is SCADA telemetry available and operational? ❑ ❑ • ❑ Is audible and visual alarm available and operational? ❑ ❑ ❑ • Comment: The Influent Pump Station has been bypassed since the November flood. Contractors have been working continuously to replace the damaged components. Bar Screens Yes No NA NE 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: The mechanical bar screen has been bypassed due to the bypass pumping configuration. Grit Removal Type of grit removal a.Manual Yes No NA NE Page# 4 Permit: NC0024872 Inspection Date: 03/23/2021 Owner - Facility: Cooleemee WWTP Inspection Type: Compliance Evaluation Grit Removal b.Mechanical Is the grit free of excessive organic matter? Is the grit free of excessive odor? # Is disposal of grit in compliance? 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? 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'/ of the sidewall depth) Yes No NA NE ❑ ❑ • ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ • Comment: The WWTP has two secondary clarifiers. Both were in operation and appeared to be very well maintained. The effluent in the weir troughs appeared to be very clear at the time of the inspection. Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Surface 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? • ❑ ❑ ❑ Is the DO level acceptable? • ❑ ❑ ❑ Is the DO level acceptable?(1.0 to 3.0 mg/I) • ❑ ❑ ❑ Comment: The extended aeration basin appeared to be operating properly. The basin has two mixers and two mechanical aerators. The mixers and aerators alternate with each other and run every other 30-minutes. The D.O. probe at the time of the inspection was reading 2.4 mg/I. Page# 5 Permit: NC0024872 Inspection Date: 03/23/2021 Owner - Facility: Cooleemee WWTP Inspection Type: Compliance Evaluation Aeration Basins 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: Yes No NA NE Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ • ❑ • ❑ ❑ ❑ ❑ • ❑ De -chlorination Yes No NA NE Type of system ? Gas 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 Yes No NA NE # 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 was calibrated on October 22, 2020. Effluent Pipe Yes No NA NE Page# 6 Permit: NC0024872 Inspection Date: 03/23/2021 Owner - Facility: Cooleemee 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? Yes No NA NE • ❑ ❑ ❑ ▪ El El El ❑ ❑ • ❑ Comment: The right-of-way to the outfall pipe was clear and very well maintained. The effluent pipe wa: submerged during the time of the inspection. 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)? Is the facility sampling performed as required by the permit (frequency, sampling type representative)? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Comment: The County has purchased a new effluent composite sampler. There was a thermometer laying on the floor of the refrigerator that was not NIST certified. Please be advised that a NIST certified thermometer placed in a liquid must be located in the sampler refrigerator and must be calibrated annually with proof of calibration readily available for inspection. 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: 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)? Yes No NA NE ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 7 Permit: NC0024872 Inspection Date: 03/23/2021 Owner - Facility: Cooleemee WWTP Inspection Type: Compliance Evaluation Laboratory Yes No NA NE Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? ❑ ❑ ❑ • Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? ❑ ❑ ❑ • Comment: 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 replacement sampler was on back order at the time or the inspection. The operator collects hourly grab samples. 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# 8