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Home My WebLink AboutNC0020559_Compliance Evaluation Inspection_20210730ROY COOPER Governor ELIZABETH S. BISER Secretary S. DANIEL SMITH Director Frank Frazier, City Manager City of Henderson PO Box 1434 Henderson, NC 27536-1434 Dear Mr. Frazier: NORTH CAROLINA Environmental Quality July 30, 2021 Subject: Compliance Evaluation Inspection Henderson Water Reclamation Facility NPDES Permit No. NC0020559 Vance County Mitch Hayes of the Division of Water Resources conducted the subject inspection on July 22, 2021. The assistance of Christie Lipscomb, Operator in Responsible Charge (ORC), Brandon Elliot, back- up ORC, Seth Davidson and Darrel Johnson with this inspection was greatly appreciated. Below is a list of findings developed from review of the permit and the inspection: 1. The subject permit was reissued June 28, 2019, became effective August 1, 2019 and will expire March 31, 2023. 2. The 4.14 MGD facility consists of the following units: bar screen and grit chamber; biological nutrient removal system — 4 anaerobic basins, 2 anoxic zones, 2 oxidation ditches with 4 aerators (100 HP); final clarifiers; tertiary filters; post aeration; UV - disinfection with sodium hypochlorite backup; aerobic digester; sludge holding tank; two (2) waste activated sludge pumps; screw thickener; screw thickener discharge pump. 3. At the time of inspection, one side of the BNR system was in operation due to low influent flow. Sludge appeared chocolate brown in color in the aeration zone with foam covering less than 10% of the surface area. One clarifier was out of service due to an inoperable electric motor. Sludge blanket in the other clarifier measured lh foot with a sidewall depth of 18 feet. The digester was approximately 3/4 full. The sludge dewatering process was not in operation at the time of inspection. Effluent at the post aeration and v-notch weir appeared clear with no solids and very little foam. 4. Discharge Monitoring Reports for the review period December 2018 through June 2021 were checked for compliance with permit limits and monitoring requirements. BOD and TSS limit violations were noted for 03.23.2019. Aquatic toxicity permit limit violation was noted for 01.21.2021 and 03.08.2021. BOD violation was noted on 05.31.2021. Monthly and weekly average violations for BOD are noted for June 2021. This violation will be addressed in future correspondence. All other violations have been previously addressed. North Carolina Department of Environmental Quality I Division of Water Resources Raleigh Regional Office 13800 Barrett Drive Raleigh, North Carolina 27609 919.7944200 5. Commercial lab results, chain of custody records, and bench sheets were compared with data submitted on the Discharge Monitoring Report (DMR) for May 2021. No discrepancies were noted. 6. City of Henderson WRF laboratory, certified lab number 242, is certified for BOD, TSS, ammonia nitrogen, fecal coliform, pH, DO, temperature, and conductivity. Environment 1, certified lab number 10, is certified for chlorophyll A. Meritech, laboratory certified number 165, is certified for nutrient parameters, chronic toxicity, and metals. 7. The laboratory was checked in a cursory manner. All pH buffers were within expiration date. All calibrations of instruments and temperatures of refrigerators and other equipment are recorded daily in a log book. I would like to thank everyone involved with this inspection for their time and assistance. If you have any questions concerning the inspection or this letter, please contact Mitch Hayes at 919.791.4261 or at mitch.hayes@ncdenr.gov cc: permit file, Laserfiche Sincerely, Scott Vinson, Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NC DEQ North Carolina Department of Environmental Qual ty I Division of Water Resources Raleigh Regional Office 13800 Barrett Drive I Raleigh, North Carolina 27609 919.791.4200 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 Code NPDES yr/mo/day Inspection 1 III 2 Iti l 3 I NC0020559 111 121 21/07/22 117 Type 181 I I I I I I Inspector Fac Type 191 2 I 201 I 211 11 1 1 I l I l I I 1 1 1 1 1 I I I I f I I I I 1 I I I l I I j I j 1 1 r6 I f Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 CIA 67I I 70Li 71I LI 72 I i I LJ Reserved 73I 1 �74 71 1 11 I 1 1 1 180 - Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include POTW name and NPDES permit Number) Henderson WRF NC Hwy 39 Henderson NC 27536 Entry Time/Date 10:O0AM 21/07/22 Permit Effective Date 19/08/01 Exit Time/Date 11:45AM 21/07/22 Permit Expiration Date 23/03/31 Name(s) of Onsite Representative(s)/Titles(s)1Phone and Fax Number(s) 111 Brandon Todd Elliott//252-431-6080 / Brandon Todd Elliott/ORC/252-431-6080/ Clarissa M Lipscomb/ORC/252-438-2142/ Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Terrell Blackmon,PO Box 1434 Henderson NC 275361434/City Manager/252-430-5701/ No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Flow Measurement II Operations & Maintenar II Records/Reports • Self -Monitoring Progran Sludge Handling Dispo: • Facility Site Review Effluent/Receiving Wale • 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 Mitchell S Hayes DWR/RRO WQ/919-791-4200/ 4.: c: al 073, zcz1 Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date 47:7,,,,,4t.tic� ,�9-i�-�i3z 1-4, r�� 7��/ EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# 1 1 NPDES NC0020559 yr/mo/day 21/07/22 I17 Inspection Type 181�1 (Cont.) 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) The subject permit was reissued June 28, 2019, became effective August 1, 2019 and will expire March 31, 2023. The 4.14 MGD facility consists of the following units: bar screen and grit chamber; biological nutrient removal system — 4 anaerobic basins, 2 anoxic zones, 2 oxidation ditches with 4 aerators (100 HP); final clarifiers; tertiary filters; post aeration; UV -disinfection with sodium hypochlorite backup; aerobic digester; sludge holding tank; two (2) waste activated sludge pumps; screw thickener; screw thickener discharge pump. At the time of inspection, one side of the BNR system was in operation due to low influent flow. Sludge appeared chocolate brown in color in the aeration zone with foam covering less than 10% of the surface area. One clarifier was out of service due to an inoperable electric motor. Sludge blanket in the other clarifier measured 'Afoot with a sidewall depth of 18 feet. The digester was approximately % full. The sludge dewatering process was not in operation at the time of inspection. Effluent at the post aeration and v-notch weir appeared clear with no solids and very little foam. Discharge Monitoring Reports for the review period December 2018 through June 2021 were checked for compliance with permit limits and monitoring requirements. BOD and TSS limit violations were noted for 03.23.2019. Aquatic toxicity permit limit violation was noted for 01.21.2021 and 03.08.2021. BOD violation was noted on 05.31.2021. Monthly and weekly average violations for BOD are noted for June 2021. This violation will be addressed in future correspondence. All other violations have been previously addressed. Commercial lab results, chain of custody records, and bench sheets were compared with data submitted on the Discharge Monitoring Report (DMR) for May 2021. No discrepancies were noted. City of Henderson WRF laboratory, certified lab number 242, is certified for BOD, TSS, ammonia nitrogen, fecal coliform, pH, DO, temperature, and conductivity. Environment 1, certified lab number 10, is certified for chlorophyll A. Meritech, laboratory certified number 165, is certified for nutrient parameters, chronic toxicity, and metals. The laboratory was checked in a cursory manner. All pH buffers were within expiration date. All calibrations of instruments and temperatures of refrigerators and other equipment are recorded daily in a log book. Page# 2 Permit: NC0020559 Owner - Facility: Henderson WRF Inspection Date: 07/22/2021 Inspection Type: Compliance Evaluation Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? • 0 ❑ 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 (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? Comment. No special conditions. Yes No NA NE • ❑ • ❑ • ❑ ❑ ❑ ❑ • ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ 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? M ❑ ❑ ❑ 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 0 0 • ❑ operator on each shift? Is the ORC visitation log available and current? • 0 0 0 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? Page# 3 Permit: NC0020559 Owner - Facility: Henderson WRF Inspection Date: 07/22/2021 Inspection Type: Compliance Evaluation Record Keeping 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. This is a 4.14 MGD facility. Yes No NA NE ■ ❑❑❑ • ❑ ❑ ❑ 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 appeared clear. Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? • ❑ ❑ ❑ Is flow meter calibrated annually? 11000 Is the flow meter operational? •❑ ❑ ❑ (If units are separated) Does the chart recorder match the flow meter? 00.0 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 0 0 • # Is the odor acceptable? 11000 # Is tankage available for properly waste sludge? 11000 Comment' The digester was approximately 3/4 full. Solids Handling Equipment Yes No NA NE Is the equipment operational? 1 ❑ ❑ ❑ Is the chemical feed equipment operational? • ❑ ❑ ❑ Is storage adequate? ■ ❑ ❑ ❑ Is the site free of high level of solids in filtrate from filter presses or vacuum filters? 0 ❑ • 0 Is the site free of sludge buildup on belts and/or rollers of filter press? • ❑ ❑ ❑ Is the site free of excessive moisture in belt filter press sludge cake? ❑ ❑ ❑ The facility has an approved sludge management plan? • 0 0 0 Page# 4 Permit: NC0020559 Owner - Facility: Henderson WRF Inspection Date: 07/22/2021 Inspection Type: Compliance Evaluation Solids Handling Equipment Yes No NA NE Comment. Sludge handling equipment was not operating at the time of inspection. Chemical Feed Yes No NA NE Is containment adequate? •❑ ❑ ❑ Is storage adequate? ■ ❑ ❑ ❑ Are backup pumps available? •❑ ❑ ❑ Is the site free of excessive leaking? •❑ ❑ ❑ Comment: 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? 0 ❑ ❑ • Is SCADA telemetry available and operational? • 0 0 0 Is audible and visual alarm available and operational? 130 ❑ Comment: 4 pumps, with 1 running due to low inflow. Bar Screens 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: Grit Removal Type of grit removal a.Manual b.Mechanical Yes No NA NE 0 • • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE o • Page# 5 Permit: NC0020559 Owner - Facility: Henderson WRF Inspection Date: 07/22/2021 Inspection Type: Compliance Evaluation Grit Removal Yes No NA NE Is the grit free of excessive organic matter? M 0 0 0 Is the grit free of excessive odor? 11 0 0 0 # Is disposal of grit in compliance? • 0 0 0 Comment: Secondary Clarifier Yes No NA NE Is the clarifier free of black and odorous wastewater? • 0 ❑ 0 Is the site free of excessive buildup of solids in center well of circular clarifier? • 0 0 0 Are weirs level? • 0 0 ❑ Is the site free of weir blockage? • 0 0 0 Is the site free of evidence of short-circuiting? • 0 0 0 Is scum removal adequate? 1 ❑ ❑ ❑ Is the site free of excessive floating sludge? • 0 ❑ ❑ Is the drive unit operational? • 0 0 0 Is the return rate acceptable (low turbulence)? • 0 0 0 Is the overflow clear of excessive solids/pin floc? • 0 0 0 Is the sludge blanket level acceptable? (Approximately' of the sidewall depth) ■ ❑ ❑ ❑ Comment: one clarifier was out of service due to an inoperable electric motor. Sludge blanket in the other clarifier measured 1/2 foot with a side wall depth of 18 feet. Oxidation Ditches Yes No NA NE Are the aerators operational? • 0 ❑ ❑ Are the aerators free of excessive solids build up? • 0 0 0 # Is the foam the proper color for the treatment process? •❑ ❑ ❑ Does the foam cover less than 25% of the basin's surface? 1 ❑ ❑ ❑ Is the DO level acceptable? ■ ❑ ❑ ❑ Are settleometer results acceptable (> 30 minutes)? 0 0 0 • Is the DO level acceptable?(1.0 to 3.0 mg/I) • 0 0 0 Are settelometer results acceptable?(400 to 800 ml/I in 30 minutes) 0 0 0 ■ Comment: Nutrient Removal # Is total nitrogen removal required? # Is total phosphorous removal required? Yes No NA NE ❑ • ❑ ❑ ❑ • ❑ ❑ Page# 6 Permit: NC0020559 Owner - Facility: Henderson WRF Inspection Date: 07/22/2021 Inspection Type: Compliance Evaluation Nutrient Removal Yes No NA NE Type Biological # Is chemical feed required to sustain process? ❑ • ❑ ❑ Is nutrient removal process operating properly? • ❑ ❑ ❑ Comment: Filtration (High Rate Tertiary) Yes No NA NE Type of operation: Down flow Is the filter media present? ■ ❑ ❑ ❑ Is the filter surface free of clogging? •❑ ❑ ❑ Is the filter free of growth? • ❑ ❑ ❑ Is the air scour operational? 111000 Is the scouring acceptable? ■ ❑ ❑ ❑ Is the clear well free of excessive solids and filter media? •❑ ❑ ❑ Comment: Disinfection - UV Yes No NA NE Are extra UV bulbs available on site? ■ ❑ ❑ ❑ Are UV bulbs clean? • ❑ ❑ ❑ Is UV intensity adequate? •❑ ❑ ❑ Is transmittance at or above designed level? •❑ ❑ ❑ Is there a backup system on site? •❑ ❑ ❑ Is effluent clear and free of solids? •❑ ❑ ❑ Comment: Standby Power Is automatically activated standby power available? Is the generator tested by interrupting primary power source? Is the generator tested under Toad? 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑•❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 7 Permit: NC0020559 Inspection Date: 07/22/2021 Owner - Facility: Henderson WRF Inspection Type: Compliance Evaluation Standby Power Yes No NA NE Comment. Generator is operated weekly under load. 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- 1.0 degrees? Comment: Yes No NA NE ▪ ❑ ❑ ❑ • ❑ ❑ ❑ ▪ ❑ ❑ ❑ ▪ ❑ Cl ❑ II ❑ ❑ ❑ III ❑ ❑ ❑ Influent Sampling Yes No NA NE # Is composite sampling flow proportional? • ❑ 0 ❑ 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 • 0 ❑ ❑ degrees Celsius)? Is sampling performed according to the permit? •❑ ❑ ❑ Comment: Effluent Sampling Yes No NA NE Is composite sampling flow proportional? • ❑ 0 0 Is sample collected below all treatment units? ■ ❑ ❑ ❑ Is proper volume collected? ❑ 0 ❑ • Is the tubing clean? • 0 ❑ 0 # Is proper temperature set for sample storage (kept at less than or equal to 6.0 • ❑ 0 0 degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type • ❑ ❑ 0 representative)? 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