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Home My WebLink AboutNC0020338_Compliance Evaluation Inspection_20240903 (2)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 2 u 3 I NCO020338 111 121 24/07/26 I17 18 L� ] 19 I s I 201 211IIIII 111111III II III III1 I I IIIII IIIIIIIII II r6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 67 I 72 I ni I 73 � I 74 79 I I I I I I I80 70 I I 71 I LL -1 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 Dermit Number) 10:OOAM 24/07/26 20/03/01 Yadkinville WWTP 1620 Fred Hinshaw Rd Exit Time/Date Permit Expiration Date Yadkinville NC 27055 11:30AM 24/07/26 25/02/28 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Grant Franklin Trivette/ORC/336-679-2184/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Grant F Trivette,1620 Fred Hinshaw Rd Yadkinville NC 27055/ORC/336-679-2184/ No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Operations & Maintenar 0 Records/Reports Sludge Handling Dispo: Facility Site Review 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 Qua Iity/336-776-9694/ DocuSigned by: Ras", 9/3/2024 Signature of'Onagement Q A Reviewer Agency/Office/Phone and Fax Numbers Date by: 9/3/2024 F�DocuSigned - T. '-- 145ME225CMEA... EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# NPDES yr/mo/day Inspection Type NCO020338 I11 12I 24/07/26 117 18 i c i (Cont.) Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) NC0020338 — Yadkinville WWTP Inspection Summary — July 26,2024 The permit became effective on March 1, 2020, and will expire on February 28, 2025. A permit renewal application has been submitted on June 26, 2024. The plant is permitted for a maximum monthly average of 2.5 MGD and treats a daily flow of .7 to .8 MGD. The WWTP has an elaborate industrial pre-treatment program that regulates 4 significant industrial users with one of them being a US EPA Catagorical Industrial User (metal finishing). Preliminary treatment consists of a mechanical "Step" bar screen with a press, and an aerated grit chamber. Secondary treatment consists of a plug flow oxidation ditch with fine and coarse air diffusers, and a secondary clarifier. The WWTP uses chlorine gas for disinfection and sulfur dioxide for de -chlorination. A risk management program is kept up to date for this process and is inspected regularly by the Division of Air Quality. The WWTP appeared to be well operated and maintained. No discrepancies were noted during the inspection. Mr. Trivett and his staff do a very good job with regards to keeping logbooks and records. The October 2023, and the April 2024 eDMRs were spot checked with the results on the lab result reports. No discrepancies were noted. The standby generator was tested under load on April 17, 2024. The effluent was very clear on the day of the inspection. The WWTP discharges into North Deep Creek which is classified WS-IV waters in the Yadkin -Pee Dee River Basin. Page# Permit: NCO020338 Inspection Date: 07/26/2024 Owner -Facility: Yadkinville WWTP 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: The WWTP appeared to be well operated and maintained. No discrepancies were noted during the inspection. 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 permit became effective on March 1, 2020, and will expire on February 28, 2025. A permit renewal application has been submitted on June 26, 2024. The plant is permitted for a maximum monthly average of 2.5 MGD and treats a daily flow of .7 to .8 MGD. 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: Grit Removal Yes No NA NE Type of grit removal 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 ❑ ❑ ❑ Page# 3 Permit: NCO020338 Owner -Facility: Yadkinville WWTP Inspection Date: 07/26/2024 Inspection Type: Compliance Evaluation Grit Removal Yes No NA NE Comment: Oxidation Ditches Yes No NA NE Are the aerators operational? 0 ❑ ❑ ❑ Are the aerators free of excessive solids build up? 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? ❑ ❑ ❑ Are settleometer results acceptable (> 30 minutes)? 0 ❑ ❑ ❑ Is the DO level acceptable?(1.0 to 3.0 mg/1) ❑ ❑ ❑ Are settelometer results acceptable?(400 to 800 ml/I in 30 minutes) 0 ❑ ❑ ❑ Comment: Secondary Clarifier Yes No NA NE Is the clarifier free of black and odorous wastewater? 0 ❑ ❑ ❑ Is the site free of excessive buildup of solids in center well of circular clarifier? ■ ❑ ❑ ❑ Are weirs level? 0 ❑ ❑ ❑ Is the site free of weir blockage? 0 ❑ ❑ ❑ Is the site free of evidence of short-circuiting? 0 ❑ ❑ ❑ Is scum removal adequate? ■ ❑ ❑ ❑ Is the site free of excessive floating sludge? 0 ❑ ❑ ❑ Is the drive unit operational? 0 ❑ ❑ ❑ Is the return rate acceptable (low turbulence)? ■ ❑ ❑ ❑ Is the overflow clear of excessive solids/pin floc? 0 ❑ ❑ ❑ Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth) 0 ❑ ❑ ❑ Comment: Disinfection -Gas Yes No NA NE Are cylinders secured adequately? 0 ❑ ❑ ❑ Are cylinders protected from direct sunlight? 0 ❑ ❑ ❑ Is there adequate reserve supply of disinfectant? ■ ❑ ❑ ❑ Is the level of chlorine residual acceptable? 0 ❑ ❑ ❑ Is the contact chamber free of growth, or sludge buildup? 0 ❑ ❑ ❑ Page# 4 Permit: NCO020338 Owner -Facility: Yadkinville WWTP Inspection Date: 07/26/2024 Inspection Type: Compliance Evaluation Disinfection -Gas Yes No NA NE Is there chlorine residual prior to de -chlorination? 0 ❑ ❑ ❑ Does the Stationary Source have more than 2500 Ibs of Chlorine (CAS No. 0 ❑ ❑ ❑ 7782-50-5)? If yes, then is there a Risk Management Plan on site? 0 ❑ ❑ ❑ If yes, then what is the EPA twelve digit ID Number? (1000- If yes, then when was the RMP last updated? Comment: The WWTP uses chlorine gas for disinfection and sulfur dioxide for de -chlorination. A risk management program is kept up to date for this process and is inspected regularly by the Division of Air Quality. De -chlorination Yes No NA NE Type of system ? Gas Is the feed ratio proportional to chlorine amount (1 to 1)? 0 ❑ ❑ ❑ Is storage appropriate for cylinders? ■ ❑ ❑ ❑ # Is de -chlorination substance stored away from chlorine containers? 0 ❑ ❑ ❑ Comment: Are the tablets the proper size and type? Are tablet de -chlorinators operational? Number of tubes in use? Comment: ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ Page# 5