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Home My WebLink AboutNC0073679_Compliance Evaluation Inspection_20240119DocuSign Envelope ID: 73AE7306-1144-4DC3-98E1-B2E42CE26D88 ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director Shannon Becker, President Aqua North Carolina Inc 202 Mackenan Ct. Cary, NC 27511 NORTH CAROLINA Environmental Quality January 19, 2024 Subject: Compliance Evaluation Inspection Oak Hollow WTP NPDES Permit No. NCO073679 Wake County Dear Mr. Becker: On December 21, 2023, Cheng Zhang of the Raleigh Regional Office (RRO) conducted a compliance evaluation inspection of the subject facility. The assistance provided by Mr. Joseph Hawley, the operator in responsible charge (ORC), Mr. Chris Weaver, the backup ORC, and Ms. Lorrie Stagner, the Regional Supervisor, was greatly appreciated as it facilitated the inspection process. The inspection report is attached. The following observations were made: The 0.00072 MGD facility consists of the following units: influent raw water (single groundwater well), three (3) each, circular greensand filters, disinfection (chlorination/ dechlorination) potable -water storage tank [5,000 gal], wastewater sandbed, and discharge line (2- in diam.) to outfall. The facility discharges into an unnamed tributary (UT) to Middle Creek [Stream Segment 27-43-15-(1)], a waterbody currently classified C; NSW within Subbasin 03- 04- 03 [HUC: 03020201] of the Neuse River Basin. 1. The current permit expired on April 30, 2023. Renewal application was received by the Division on October 17, 2022. 2. Wastewater storage was listed in the current permit, however, the facility does not have a storage tank to hold backwash wastewater. 3. At the time of inspection, the system was not backwashing. When backwashing, calcium thiosulphate solution is fed to backwash water, which is filtered through the sandbed before being discharged at the outfall. 4. The ORC maintains a visiting logbook. Lab results, chain -of -custody forms, and DMRs were complete and current, kept in good order and ready for review. January and July 2023 DMR data were compared to lab bench sheets; no data transcription errors were noted. NORTH CAROLINAD �� Depa ,M NE,Amnm W1U-IR, North Carolina Department of Environmental Quality I Division of Water Resources Raleigh Regional Office 1 3800 Barrett Drive I Raleigh, North Carolina 27609 919.791.4200 DocuSign Envelope ID: 73AE7306-1144-4DC3-98E1-B2E42CE26D88 5. Discharge Monitoring Reports for the review period from December 2018 through October 2023 were reviewed for compliance for permit limits and monitoring requirements. No limit or frequency violations were noted. At the time of the inspection, the facility appeared to be in compliance with all applicable permit stipulations If you have any questions regarding the attached reports or any of the findings, please contact Cheng Zhang at: (919) 791-4259 (or email: chen .zhan deq.nc.gov). Sincerely, DocuSigned by: VoUn t,SSa f. B2916E6AB32144F... Vanessa E. Manuel, Assistant Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NCDEQ Attachment(s): EPA Water Compliance Inspection Report Cc: Laserfiche Lorrie Stagner, Aqua North Carolina (Electronic copy only) D � �� North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH CAROLINA ��` 919.707.9000 nnpn .mo EnWromm�nfal nual DocuSign Envelope ID: 73AE7306-1144-4DC3-98E1-B2E42CE26D88 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 NC0073679 111 121 23/12/21 I17 18 I C I 19 Ls_] 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 r6 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 701 I 71 I LL J I I LJ 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 permit Number) 09:OOAM 23/12/21 18/11/01 Oak Hollow WTP Oak Hollow Subdivision Exit Time/Date Permit Expiration Date Willow Spring, NC 27592 10:OOAM 23/12/21 23/04/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Christopher Lee Weaver/ORC// Joseph Kirk Hawley/ORC/919-369-8493/ Lorrie M Stag ner//91 9-653-5770 /9194601788 Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Lorrie M Stagner,202 Mackenan Dr Cary NC 275116447//919-653-5770/9194601788 Yes Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Operations & Maintenar Records/Reports Self -Monitoring Progran Facility Site Review N 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 Cheng Zhang Docusignedby: DWR/RRO WQ/919-791-4200/ 1/19/2024 ED6171508P EC41F... Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date FDocuSigned by: 1/19/2024 EPA�—UW3669PY?K'& 9-94) Previous editions are obsolete. Page# DocuSign Envelope ID: 73AE7306-1144-4DC3-98E1-B2E42CE26D88 NPDES yr/mo/day Inspection Type (Cont.) NCO073679 I11 12I 23/12/21 117 18 i c i Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Current permit expired on April 30, 2023. Renewal application was received by the Division on October 17, 2022. The facility does not have a wastewater storage tank. Backwash water is dechlorinated with calsium thiosulphate solution,filtered through the sandbed, and discharged at the outfall. The ORC maintains a visiting logbook. Lab results, chain -of -custody forms, and DMRs were complete and current, kept in good order and ready for review. January and July 2023 DMR data were compared to lab bench sheets; no data transcription errors were noted Page# DocuSign Envelope ID: 73AE7306-1144-4DC3-98E1-B2E42CE26D88 Permit: NCO073679 Owner -Facility: Oak Hollow WTP Inspection Date: 12/21/2023 Inspection Type: Compliance Evaluation 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: 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? ❑ ❑ ■ ❑ Is access to the plant site restricted to the general public? 0 ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? 0 ❑ ❑ ❑ Comment: Current permit expired on April 30, 2023. Renewal application was received by the Division on October 17, 2022. The facility does not have a wastewater storage tank. De -chlorination Yes No NA NE Type of system ? Liquid Is the feed ratio proportional to chlorine amount (1 to 1)? 0 ❑ ❑ ❑ Is storage appropriate for cylinders? ❑ ❑ 0 ❑ # Is de -chlorination substance stored away from chlorine containers? 0 ❑ ❑ ❑ Are the tablets the proper size and type? ❑ ❑ ❑ Comment: Calcium thiosulphate solution is fed to backwash water for de -chlorination. Are tablet de -chlorinators operational? ❑ ❑ ❑ Number of tubes in use? Comment: Sand Filters (Low rate) Yes No NA NE (If pumps are used) Is an audible and visible alarm Present and operational? ❑ ❑ 0 ❑ Is the distribution box level and watertight? ❑ ❑ M ❑ Is sand filter free of ponding? 0 ❑ ❑ ❑ Is the sand filter effluent re -circulated at a valid ratio? ❑ ❑ 0 ❑ # Is the sand filter surface free of algae or excessive vegetation? 0 ❑ ❑ ❑ # Is the sand filter effluent re -circulated at a valid ratio? (Approximately 3 to 1) ❑ ❑ 0 ❑ Page# 3 DocuSign Envelope ID: 73AE7306-1144-4DC3-98E1-B2E42CE26D88 Permit: NCO073679 Owner -Facility: Oak Hollow WTP Inspection Date: 12/21/2023 Inspection Type: Compliance Evaluation Sand Filters (Low rate) Yes No NA NE Comment: Standing water on top of filter due to recent heavy rain. Effluent Pipe Yes No NA NE 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: Effluent went into a dry ditch. 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? ■ ❑ ❑ ❑ 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? ■ ❑ ❑ ❑ Page# 4 DocuSign Envelope ID: 73AE7306-1144-4DC3-98E1-B2E42CE26D88 Permit: NCO073679 Owner -Facility: Oak Hollow WTP Inspection Date: 12/21/2023 Inspection Type: Compliance Evaluation 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? Comment: Yes No NA NE ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ Page# 5