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Home My WebLink AboutNC0031577_Compliance Evaluation Inspection_20211208DocuSign Envelope ID: 883730AF-63E0-4B17-BC2B-A065CF18lB81 ROY COOPER Governor ELIZABETH S. BISER Secretary S. DANIEL SMITH Director rcSTATE r NORTH CAROLINA Environmental Quality December 21, 2021 Tony Konsul Carolina Water Service Inc of North Carolina 4944 Parkway Plaza Blvd Charlotte, NC 28217 SUBJECT: Compliance Inspection Report White Oak Estates WWTP NPDES WW Permit No. NCO031577 Onslow County Dear Permittee: The North Carolina Division of Water Resources conducted an inspection of the White Oak Estates WWTP on 12/08/2021. This inspection was conducted to verify that the facility is operating in compliance with the conditions and limitations specified in NPDES WW Permit No. NC0031577. The findings and comments noted during this inspection are provided in the enclosed copy of the inspection report entitled "Compliance Inspection Report". There were no significant issues or findings noted during the inspection and therefore, a response to this inspection report is not required. If you should have any questions, please do not hesitate to contact Helen Perez with the Water Quality Regional Operations Section in the Wilmington Regional Office at 910-796-7215 or via email at helen.perez@ncdenr.gov. Sincerely, DocuSigned by: I ONE �a.a'f1 0A. for 7F141 E73B6F3456... Morella Sanchez -King, Regional Supervisor Water Quality Regional Operations Section Wilmington Regional Office Division of Water Resources, NCDEQ ATTACHMENTS Cc: Anthony Futrell — electronic copy Greg Spillman — electronic copy DE North Carolina Department of Environmental Quality I Division of Water Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405 910.796.7215 DocuSign Envelope ID: 883730AF-63EO-4B17-BC2B-AO65CF181B81 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 u 3 I NCO031577 I11 121 21/12/08 I17 18I � I 19 I s I 201 I 211IIIII 111111III II III III1 I I IIIII IIIIIIIII II r6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 67 701� I 711ni I 72 I Lni I 71 I 74 79 I I I I I I I80 LJ 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) 09:OOAM 21/12/08 17/07/01 White Oak Estates WWTP 105 Rock Rd Exit Time/Date Permit Expiration Date Jacksonville NC 28546 10:20AM 21/12/08 22/06/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Anthony Garland Futrell//910-938-5277 / Gregory D Spillman/ORC// Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Tony Konsul,4944 Parkway Plz Blvd Charlotte NC 28217/Regional Manager/704-319-0523/7045258174 Yes 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 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 Helen I Perez DE ocuSigned by: DWR/WIRO WQ/910-796-7387/ H'�en, 12/21/2021 1 D645B4A3969413E... Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date DocuSigned by: Tom Tharrington 'Cuµ �DrW /WIRO WQ/ - - / 12/21/2021 a-c "- 7141 E73136F345s, EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# DocuSign Envelope ID: 883730AF-63E0-4B17-BC2B-A065CF181B81 NPDES yr/mo/day Inspection Type (Cont.) NCO031577 I11 12I 21/12/08 117 18 i c i Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) A routine compliance inspection of the White Oak Estates WWTP was conducted on December 8, 2021. The purpose of the evaluation was to verify that the facility is operating in compliance with the conditions and limitations specified in Permit NC0031577. Greg Spillman, Anthony Futrell and staff were present during the inspection. This older 0.22 MG facility appears to be well maintained and has averaged a little over 0.1 MG flow this year. The facility consists of three inter -connected EQ basins that feed 3-40,000 gallon extended aeration trains and 1-100,000 gallon extended aeration train, each followed by clarifiers and tertiary filters. Effluent is discharged to the Northeast Creek. A review of violations for this permit cycle shows: 05/18 daily BOD 10/19 daily Enterococci 07/20 monthly ammonia 08/20 daily Enterococci 09/20 daily Enterococci 01/21 through 05/21 several daily BOD and Enterococci, monthly ammonia A technical assistance visit was requested by Carolina Water Service staff in June of this year to discuss issues with COD from de -chlorination influencing BOD and possibly other composite parameters. As suggested, operators have been keeping a higher volume in the EQ during the day which allows a more consistent and continuous flow at night to assist the use of flow pacing of chemical addition for disinfection and de -chlorination. In addition, adjustments were made in dechlorination dosing so TRC values produced are in the 20-35 ug/I range to reduce any impact of COD. There have been no violations since these adjustments. The current permit expires on June 30, 2022 and a renewal application is due by December 31, 2021. The facility is compliant with NPDES Permit NC0031577. Please review the comment sections of the inspection report for more details. Page# DocuSign Envelope ID: 883730AF-63E0-4B17-BC2B-A065CF181B81 Permit: NCO031577 Owner -Facility: White Oak Estates WWTP Inspection Date: 12/08/2021 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? 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: The permit expires on June 30, 2022. A renewal application will be due by December 31, 2021. 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: DMRs and laboratory COCs and results were well maintained and available for review. The operator log was detailed and complete. Laboratory Yes No NA NE Page# 3 DocuSign Envelope ID: 883730AF-63E0-4B17-BC2B-A065CF181B81 Permit: NCO031577 Inspection Date: 12/08/2021 Owner - Facility: White Oak Estates WWTP Inspection Type: Compliance Evaluation 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ Comment: The facility is field certified, Certification #5162. Envirochem Lab, Certification #94, is contracted for all other parameters. The calibration curve for the Hach Chlorine Meter was being updated by Envirochem. It was confirmed, during the inspection, that it was calibrated down to 10 ug/I. 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 ❑ ❑ ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Settleable solids testing, along with measurements of sludge blanket in clarifiers, are routinely analyzed to determine RASMAS rates and approximate MLSS. DO is also monitored for process control. 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: The effluent flow meter was calibrated on 1/2/2021 by Delta Environmental Systems. Pump Station - Influent Yes No NA NE Is the pump wet well free of bypass lines or structures? 0 ❑ ❑ ❑ Is the wet well free of excessive grease? 0 ❑ ❑ ❑ Are all pumps present? 0 ❑ ❑ ❑ Are all pumps operable? ❑ ❑ ❑ Are float controls operable? ❑ ❑ ❑ Is SCADA telemetry available and operational? 0 ❑ ❑ ❑ Is audible and visual alarm available and operational? ❑ ❑ ❑ Comment: No comment Page# 4 DocuSign Envelope ID: 883730AF-63E0-4B17-BC2B-A065CF181B81 Permit: NCO031577 Owner -Facility: White Oak Estates WWTP Inspection Date: 12/08/2021 Inspection Type: Compliance Evaluation Pump Station - Influent Yes No NA NE 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? ■ ❑ ❑ ❑ Is disposal of screening in compliance? 0 ❑ ❑ ❑ Is the unit in good condition? 0 ❑ ❑ ❑ Comment: The manual bar screen is cleaned twice a day. Equalization Basins Yes No NA NE Is the basin aerated? 0 ❑ ❑ ❑ Is the basin free of bypass lines or structures to the natural environment? 0 ❑ ❑ ❑ Is the basin free of excessive grease? ■ ❑ ❑ ❑ Are all pumps present? ■ ❑ ❑ ❑ Are all pumps operable? 0 ❑ ❑ ❑ Are float controls operable? 0 ❑ ❑ ❑ Are audible and visual alarms operable? ■ ❑ ❑ ❑ # Is basin size/volume adequate? 0 ❑ ❑ ❑ Comment: The high level alarm in the three inter -connected EQ basins are connected to the Missions telemetry system and contacted the operator when float was pulled during the inspection. Staff indicated that they now typically keep a higher level in the EQ during the day so the flow at night is more consistant and continuous. This was suggested during a technical assistance visit in June of this year to help with the high dose of de -chlorination agent influencing BOD and possibly other composite parameters. Nutrient Removal Yes No NA NE # Is total nitrogen removal required? ❑ 0 ❑ ❑ # Is total phosphorous removal required? 0 ❑ ❑ ❑ Type Chemical # Is chemical feed required to sustain process? ■ ❑ ❑ ❑ Is nutrient removal process operating properly? 0 ❑ ❑ ❑ Comment: Ferric Sulfate is added at the influent pump station before it is pumped to the EQ basins for phosphorus removal. Page# 5 DocuSign Envelope ID: 883730AF-63E0-4B17-BC2B-A065CF181B81 Permit: NCO031577 Inspection Date: 12/08/2021 Owner -Facility: White Oak Estates WWTP Inspection Type: Compliance Evaluation Chemical Feed Yes No NA NE Is containment adequate? 0 ❑ ❑ ❑ Is storage adequate? 0 ❑ ❑ ❑ Are backup pumps available? ■ ❑ ❑ ❑ Is the site free of excessive leaking? 0 ❑ ❑ ❑ Comment: There is a back-up chemical feed pump on site for the Ferric Sulfate addition. Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Diffused Is the basin free of dead spots? N ❑ ❑ ❑ Are surface aerators and mixers operational? ❑ ❑ ■ ❑ Are the diffusers operational? 0 ❑ ❑ ❑ Is the foam the proper color for the treatment process? 0 ❑ ❑ ❑ Does the foam cover less than 25% of the basin's surface? 0 ❑ ❑ ❑ Is the DO level acceptable? ❑ ❑ ❑ Is the DO level acceptable?(1.0 to 3.0 mg/1) ❑ ❑ ❑ Comment: No comment. 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? 0 ❑ ❑ ❑ Are weirs level? 0 ❑ ❑ ❑ Is the site free of weir blockage? ■ ❑ ❑ ❑ Is the site free of evidence of short-circuiting? ■ ❑ ❑ ❑ 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) ❑ ❑ ❑ Comment: Clarifiers appeared to be well maintained. Clarifier effluent flows from each three 40,000-gallon train to a down -flow tertiary filter. The 100,000-gallon train clarifier effluent flows to a uD-flow tertiary filter. Page# 6 DocuSign Envelope ID: 883730AF-63E0-4B17-BC2B-A065CF181B81 Permit: NCO031577 Inspection Date: 12/08/2021 Owner -Facility: White Oak Estates WWTP Inspection Type: Compliance Evaluation 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? ❑ ❑ ❑ ■ Comment: No comment. Aerobic Digester Yes No NA NE Is the capacity adequate? ■ ❑ ❑ ❑ 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? ❑ ❑ ❑ ■ Comment: Two to three loads of solids are removed by Aragona Brothers twice a month. Disinfection -Liquid Yes No NA NE Is there adequate reserve supply of disinfectant? ■ ❑ ❑ ❑ (Sodium Hypochlorite) Is pump feed system operational? ■ ❑ ❑ ❑ Is bulk storage tank containment area adequate? (free of leaks/open drains) 0 ❑ ❑ ❑ 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? ❑ ❑ ❑ Comment: Liquid chlorine and de -chlorination chemicals are dosed using flow paced systems. Keeping a higher volume in the EQ during the day and allowing a consistent and continuous flow at night, as suggested during the technical assistance visit in June of this year, has helped reduce the BOD and Enterococci violations. De -chlorination Yes No NA NE Type of system ? Liquid 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? 0 ❑ ❑ ❑ Are the tablets the proper size and type? ❑ ❑ 0 ❑ Comment: Adjustments were made in dechlorination dosing so TRC values produced are in the 20-35 ug/I range to reduce any impact of COD, as suggested during the technical assistance visit in June. Are tablet de -chlorinators operational? ❑ ❑ ■ ❑ Page# 7 DocuSign Envelope ID: 883730AF-63E0-4B17-BC2B-A065CF181B81 Permit: NCO031577 Owner -Facility: White Oak Estates WWTP Inspection Date: 12/08/2021 Inspection Type: Compliance Evaluation De -chlorination Yes No NA NE Number of tubes in use? Comment: No 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? ❑ ❑ ❑ ■ Is the tubing clean? 0 ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 0 ❑ ❑ ❑ degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type ❑ ❑ ❑ representative)? Comment: The composite sampler was located inside a shed for protection from the elements. Temperature inside sampler was 5 degrees Celcius. Samples are typically collected on Monday, Tuesday and Wednesday. Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, ■ ❑ ❑ ❑ and sampling location)? Comment: DO measurements upstream and downstream are required by the permit three times a week. Page# 8