The URL can be used to link to this page

Home My WebLink AboutNC0050342_Compliance Evaluation Inspection_20210902R.OY COOPER. Governor ELIZABETH S. BISER Secretary S. DANIEL SMITH NORTH CAROLINA Director Environmental Quality August 27, 2021 Courtney Driver, Utilities Director City of Winston-Salem P.O. Box 2511 Winston-Salem, NC 27102-2511 SUBJECT: Compliance Evaluation Inspection Muddy Creek WWTP NPDES Permit No. NC0050342 Forsyth County Dear Ms. Driver, On July 30, 2021, Gary Hudson of this office met with Bonnie McKee, Chris Shamel, Keith Jones, and Matt Lavine to perform a Compliance Evaluation Inspection at the above referenced 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, I DocuSigned by:< L-o, l . JndAts `— 145B49E225C94EA... Lon Snider Regional Supervisor Water Quality Regional Operations Division of Water Resources Attachments: EPA Water Compliance Inspection Report cc: WSRO NORTH D E n.o.rtm.m of ln.im.mo.tol au.i` North Carolina Department of Environmental Quality 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 NC0050342 111 121 21/07/30 117 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 71 I 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) Muddy Creek WWTP 4561 Cooper Rd Winston Salem NC 27102 Entry Time/Date 09:OOAM 21/07/30 Permit Effective Date 17/09/01 Exit Time/Date 12:30PM 21/07/30 Permit Expiration Date 22/06/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Ozie Keith Jones/ORC/336-397-7679/ Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Ozie K Jones,4561 Cooper Rd Winston Salem NC 27127//336-397-7679/3363977667 No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Flow Measurement Operations & Maintenar Records/Reports Sludge Handling DispoFacility Site Review Effluent/Receiving Wate 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 Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date r-;iDocuSigned by: --oti T. StiAcr 8/26/2021 49 EPA Form 356403 ( e5vC4 -V4) Previous editions are obsolete. Page# 1 3I NPDES yr/mo/day NC0050342 111 121 21/07/30 117 Inspection Type 18 [j (Cont.) 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) *The current permit became effective September 1, 2017, and will expire June 30, 2022. The WWTP staff are currently in the process of completing the permit renewal application. *The WWTP appeared to be very well operated and maintained. The WWTP staff uses a target mean cell residence time (MCRT) to adjust sludge wasting rates, which varies between summer and winter months. At the time of the inspection the MCRT target was 11 days. *WWTP staff as well as the laboratory staff do a very good job of keeping records of all plant data. *The aeration basins appeared clean and very well maintained. *AII of the secondary clarifiers were clean and well maintained. *The effluent flow meter is calibrated every month by city maintenance personnel. Page# 2 Permit: NC0050342 Inspection Date: 07/30/2021 Owner - Facility: Muddy Creek WWTP 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? • ❑ El El # Are there any special conditions for the permit? El • El El Is access to the plant site restricted to the general public? • ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? • ❑ ❑ ❑ Comment: The current permit became effective September 1, 2017, and will expire June 30, 2022. The WWTP staff are currently in the process of completing the permit renewal application. 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 MODE Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: The WWTP appeared to be very well operated and maintained. The WWTP staff uses a target mean cell residence time (MCRT) to adjust sludge wasting rates, which varies between summer and winter months. At the time of the inspection the MCRT target was 11 days. 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? • El El El 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? • El El El Has the facility submitted its annual compliance report to users and DWQ? ■ El El El (If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified • El El El operator on each shift? Is the ORC visitation log available and current? • El El El Page# 3 Permit: NC0050342 Inspection Date: 07/30/2021 Owner - Facility: Muddy Creek WWTP Inspection Type: Compliance Evaluation Record Keeping 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: WWTP staff as well as the laboratory staff do a very good job of keeping records of all plant data. Bar Screens Yes No NA NE Type of bar screen a.Manual El b.Mechanical • Are the bars adequately screening debris? • El El El Is the screen free of excessive debris? • El El El Is disposal of screening in compliance? • El ❑ ❑ Is the unit in good condition? • ❑ ❑ ❑ Comment: Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Diffused 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? • El ❑ ❑ 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 aeration basins appeared clean and very well maintained. 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 4 Permit: NC0050342 Inspection Date: 07/30/2021 Owner - Facility: Muddy Creek WWTP Inspection Type: Compliance Evaluation Secondary Clarifier 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: All of the secondary clarifiers were clean and well maintained. Disinfection -Liquid 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) 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: 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? Comment: Are the tablets the proper size and type? Are tablet de -chlorinators operational? Number of tubes in use? Comment: Flow Measurement - Effluent # Is flow meter used for reporting? Is flow meter calibrated annually? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ • Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE Liquid • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ Yes No NA NE • ❑ ❑ ❑ ▪ I=1 El El Page# 5 Permit: NC0050342 Inspection Date: 07/30/2021 Owner - Facility: Muddy Creek WWTP Inspection Type: Compliance Evaluation Flow Measurement - Effluent Yes No NA NE Is the flow meter operational? (If units are separated) Does the chart recorder match the flow meter? • ❑ ❑ ❑ Comment: The effluent flow meter is calibrated every month by city maintenance personnel. Anaerobic Digester Yes No NA NE Type of operation: Floating cover Is the capacity adequate? • ❑ El El # Is gas stored on site? • El El El Is the digester(s) free of tilting covers? • ❑ ❑ ❑ Is the gas burner operational? ■ El El El Is the digester heated? • El El El Is the temperature maintained constantly? • El El El Is tankage available for properly waste sludge? • El ❑ ❑ Comment: Page# 6