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Home My WebLink AboutNC0024201_CEI_20220103ROY COOPER Governor ELIZABETH S. BISER Secretary S. DANIEL SMITH Dfrector Danieley Brown, CEO Roanoke Rapids Sanitary District PO Box 308 Roanoke Rapids, NC 27870 Subject: Dear Mr. Brown: NORTH CAROLINA Environmental Quality January 3, 2022 Compliance Evaluation Inspection Roanoke River WWTP NPDES Permit No. NC0024201 Halifax County On December 16, 2021, Mitch Hayes of the Raleigh Regional Office conducted the subject inspection with the assistance of Steven Ellis (Operator in Responsible Charge). Mr. Ellis' and Ms. Isabelle Wilcoxon's, Laboratory Supervisor, assistance with this inspection was greatly appreciated. Below is a list of findings developed from the inspection and review of the permit: 1. The current permit was reissued October 19, 2018, became effective December 1, 2018 and will expire March 31, 2022. A renewal application was received February 2, 2021 and is currently under review. 2. The 8.34 MGD consists of the following units: Huber Rotomat cylindrical screen, manual bar screen; Vortex grit removal; influent pump station with four pumps; two (2) primary clarifiers; two (2) trickling filters; two (2) 2 MG rectangle secondary clarifiers with traveling bridge; three (3) 0.5 MG aeration basins; two chlorine contact basins; two (2) RAS pump stations; three (3) anaerobic digesters with heat exchangers; one (1) WAS pump station; two (2) gravity settling tanks with gravity belt thickener and lime stabilization; one (1) 1 MG solids storage tank; effluent pump station; fourteen (14) sludge drying beds; two (2) on site generators for back-up power source. 3. At the time of inspection, one aeration basin, one trickling filter, one primary clarifier, one secondary clarifier, one chlorine contact chamber was on line due to low influent. Two anaerobic digesters were being operated. One sludge bed was being used. Effluent appeared clear in the chlorine contact tank. 4. Discharge Monitoring Reports for the review period December 2019 through December 2021 were checked for compliance with permit limits and monitoring requirements. TSS weekly and monthly average limit violation was noted for February 2021 and March 2021. There were no other violations for the review period. North Carolina Department of Environmental Quality I Division of Water Resources Raleigh Regional Office ; 3800 Barrett Drive I Raleigh. North Carolina 27609 919.791.4200 5. Commercial lab results, chain of custody records, and bench sheets were compared with data submitted on the Discharge Monitoring Report (DMR) for October 2021. No discrepancies were noted. 6. 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. 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 Quality I Division of Water Resources Raleigh Regional Office ! 3800 Barrett Drive ; Raleigh. North Carolina 27609 919.7914200 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 (Le., PCS) Transaction Code NPDES yrlmolday Inspection 1 112 i 2 E 3 1 NC0024201 111 121 21/12/16 117 Type 1812I l l I I I Inspector 1911.1 Fac Type 2011 211111 l l I I I I II I I I I I I I I I I I I I I I I I I II I I I I 1 r6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA 67I 1 j 70 � LJ I 71 I I 72 1 i I 1 Li Reserved 73I I I74 71 I 1180 11 1 HI Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include POTW name and NPDES permit Number) Roanoke River WWTP 135 Aqueduct Rd Weldon NC 27890 Entry Time/Date 10:0OAM 21/12/16 Permit Effective Date 18/12/01 Exit Time/Date 11:15AM 21/12/16 - Permit Expiration Date 22/03/31 Name(s) of Onsite Representative(s)ftles(s)/Phone and Fax Number(s) /11 Steven L Ellis//252-536-4884 /2525364885 Steven Lee Eflis/ORC/252-536-4884/ Other Facility Data Name, Address of Responsible OfficiallTitlelPhone and Fax Number Contacted Steven L EIIis,PO Box 308 Ronok Rpd Afs NC 27870/1252-536-4884/2525364885 No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) • Permit • Flow Measurement Operations & Maintenar II Records/Reports Self -Monitoring Progran 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 Mitchell S Hayes DWR/RRO WO/919-791-4200/ il/RC/1/t.GUI S, - H- el ••. ht1 O 3, Z G Z z Signature of Management() A Reviewer Agency/Office/Phone and Fax Numbers Date )747:7-e--ykrt--/ ?i? - ,V-• /1.),.c2_ 0--, t-ez,-71' Y, 4, 2-2-- EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# 1 1 NPDES NC0024201 yr/mo/day 21/12/16 117 18 Li Inspection Type (Cont.) 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) The current permit was reissued October 19, 2018, became effective December 1, 2018 and will expire March 31, 2022. A renewal application was received February 2, 2021 and is currently under review. The 8.34 MGD consists of the following units: Huber Rotomat cylindrical screen, manual bar screen; Vortex grit removal; influent pump station with four pumps; two (2) primary clarifiers; two (2) trickling filters; two (2) 2 MG rectangle secondary clarifiers with traveling bridge; three (3) 0.5 MG aeration basins; two chlorine contact basins; two (2) RAS pump stations; three (3) anaerobic digesters with heat exchangers; one (1) WAS pump station; two (2) gravity settling tanks with gravity belt thickener and lime stabilization; one (1) 1 MG solids storage tank; effluent pump station; fourteen (14) sludge drying beds; two (2) on site generators for back-up power source. At the time of inspection, one aeration basin, one trickling filter, one primary clarifier, one secondary clarifier, one chlorine contact chamber was on line due to low influent. Two anaerobic digesters were being operated. One sludge bed was being used. Effluent appeared clear in the chlorine contact tank. Discharge Monitoring Reports for the review period December 2019 through December 2021 were checked for compliance with permit limits and monitoring requirements. TSS weekly and monthly average limit violation was noted for February 2021 and March 2021. There were no other violations for the review period. Commercial lab results, chain of custody records, and bench sheets were compared with data submitted on the Discharge Monitoring Report (DMR) for October 2021. No discrepancies were noted. 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: NC0024201 Owner - Facility: Roanoke River WWTP Inspection Date: 12/16/2021 Inspection Type: Compliance Evaluation Operations & Maintenance Is the plant generally clean with acceptable housekeeping? 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. Permit expires March 31, 2022. 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 Tess or greater than the facility classification? Yes No NA NE . 000 • ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ▪ ❑ ❑ ❑ ▪ ❑ ❑ ❑ Yes No NA NE ▪ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ II • • • • • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑❑❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 3 Permit: NC0024201 Owner - Facility: Roanoke River WWTP Inspection Date: 12/16/2021 Inspection Typo: 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: Yes No NA NE • ❑ ❑ ❑ MI ❑ ❑ ❑ Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? • 0 ❑ 0 Are the receiving water free of foam other than trace amounts and other debris? • 0 0 ❑ If effluent (diffuser pipes are required) are they operating properly? • 0 0 ❑ Comment' Effluent appeared clear in the reaeration zone. Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? MO ❑ ❑ Is flow meter calibrated annually? • 0 0 0 Is the flow meter operational? • 0 0 ❑ (If units are separated) Does the chart recorder match the flow meter? • ❑ 0 ❑ Comment' Flow meter calibrated 10.13.2021. Anaerobic Digester Yes No NA NE Type of operation: Floating cover Is the capacity adequate? • ❑ ❑ ❑ # Is gas stored on site? • ❑ ❑ 0 Is the digester(s) free of tilting covers? • 0 0 0 Is the gas burner operational? 0 0 • 0 Is the digester heated? ❑ ❑ ❑ Is the temperature maintained constantly? • ❑ Cl 0 Is tankage available for properly waste sludge? •❑ ❑ ❑ Comment- Three primary anaerobic digesters in operation. Drying Beds Yes No NA NE Is there adequate drying bed space? • ❑ ❑ ❑ Is the sludge distribution on drying beds appropriate? • 0 0 ❑ Are the drying beds free of vegetation? •❑ 0 0 # Is the site free of dry sludge remaining in beds? • 0 0 0 Page# 4 Permit: NC0024201 Owner - Facility: Roanoke River WWTP Inspection Date: 12/16/2021 Inspection Type: Compliance Evaluation Drying Beds Is the site free of stockpiled sludge? Is the filtrate from sludge drying beds returned to the front of the plant? # Is the sludge disposed of through county landfill? # Is the sludge land applied? (Vacuum filters) Is polymer mixing adequate? Comment' One out of 14 drvinq beds was in use. Solids Handling Equipment Is the equipment operational? 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? 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? Comment: Belt filter presses was not in operation at the time of inspection. Yes No NA NE MOOD • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ Yes No NA NE ■ ❑❑❑ ■ ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ • ❑ • ❑ ❑ ❑ Chemical Feed Yes No NA NE Is containment adequate? ■ ❑ ❑ ❑ Is storage adequate? • 0 ❑ ❑ Are backup pumps available? •❑ ❑ ❑ Is the site free of excessive leaking? • ❑ ❑ ❑ Comment: Pump Station - Effluent Yes No NA NE Is the pump wet well free of bypass lines or structures? ■ ❑ ❑ ❑ Are all pumps present? • ❑ ❑ ❑ Are all pumps operable? 111000 Are float controls operable? ❑ ❑ ❑• is SCADA telemetry available and operational? •❑ ❑ ❑ Is audible and visual alarm available and operational? • ❑ ❑ ❑ Comment: Page# 5 Permit: NC0024201 Owner - Facility: Roanoke River WWTP Inspection Date: 12/16/2021 Inspection Type: Compliance Evaluation Pump Station - Influent Yes No NA NE Is the pump wet well free of bypass lines or structures? • 0 0 0 Is the wet well free of excessive grease? 0 0 0 • Are all pumps present? ❑ ❑ ❑ Are all pumps operable? • 0 0 0 Are float controls operable? 0 ❑ 0 Is SCADA telemetry available and operational? • 0 0 0 Is audible and visual alarm available and operational? • 0 0 0 Comment: 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 Is the grit free of excessive organic matter? Is the grit free of excessive odor? # Is disposal of grit in compliance? Comment. Grit removal is not being operated. Yes No NA NE • • • ❑ ❑ ❑ • ❑ ❑ ❑ II ❑ ❑ ❑ NI ❑ Q ❑ Yes No NA NE o • • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Equalization Basins Yes No NA NE Is the basin aerated? 0 • 0 0 Is the basin free of bypass lines or structures to the natural environment? • 0 ❑ ❑ Is the basin free of excessive grease? • 0 0 0 Are all pumps present? • 0 0 0 Page# 6 Permit: NC0024201 Owner - Facility: Roanoke River WWTP Inspection Date: 12/16/2021 Inspection Type: Compliance Evaluation Equalization Basins Yes No NA NE Are all pumps operable? •❑ ❑ ❑ Are float controls operable? 0 0 • ❑ Are audible and visual alarms operable? 00.0 # Is basin size/volume adequate? ■ ❑ ❑ ❑ Comment: Two - 375.000 gallons EQ basins. Used for high flow situations. Primary 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 ❑ ❑ Are weirs level? • ❑ 0 0 Is the site free of weir blockage? • ❑ ❑ ❑ Is the site free of evidence of short-circuiting? • 0 0 0 Is scum removal adequate? •❑ ❑ ❑ Is the site free of excessive floating sludge? • 0 ❑ 0 Is the drive unit operational? • ❑ ❑ ❑ Is the sludge blanket level acceptable? • 0 ❑ 0 Is the sludge blanket level acceptable? (Approximately Y4 of the sidewall depth) MI 0 ❑ 0 Comment: One out of two in operation. 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? MID ❑ ❑ Are weirs level? • 0 ❑ ❑ Is the site free of weir blockage? ■ ❑ ❑ ❑ Is the site free of evidence of short-circuiting? • 0 0 ❑ Is scum removal adequate? IN 0 0 0 Is the site free of excessive floating sludge? ■ 0 0 0 Is the drive unit operational? • 0 0 0 Is the return rate acceptable (low turbulence)? • ❑ ❑ ❑ Is the overflow clear of excessive solids/pin floc? • 0 0 ❑ Is the sludge blanket level acceptable? (Approximately 'A of the sidewall depth) • ❑ ❑ 0 Comment. SB was two feet with a 14 feet sidewall depth. Page# 7 Permit: NC0024201 Owner - Facility: Roanoke River WWTP Inspection Date: 12/16/2021 Inspection Type: Compliance Evaluation Trickling Filter Yes No NA NE Is the filter free of ponding? •❑ ❑ ❑ Is the filter free of leaks at the center column of filter's distribution arms? • 0 0 0 Is the distribution of flow even from the distribution arms? • 0 0 0 Is the filter free of uneven or discolored growth? • 0 ❑ 0 Is the filter free of sloughing of excessive growth? • ❑ 0 ❑ Are the filter's distribution arms orifices free of clogging? • ❑ 0 ❑ Is the filter free of excessive filter flies, worms or snails? • 0 0 ❑ Comment. Both trickling filters were in operation. Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Diffused Is the basin free of dead spots? • 0 0 0 Are surface aerators and mixers operational? • 0 ❑ 0 Are the diffusers operational? • ❑ 0 0 Is the foam the proper color for the treatment process? • ❑ ❑ 0 Does the foam cover Tess than 25% of the basin's surface? 111 ❑ 0 ❑ Is the DO level acceptable? • 0 0 0 Is the DO level acceptable?(1.0 to 3.0 mg/I) • ❑ 0 ❑ Comment' One out of three basins were in use. De -chlorination Yes No NA NE Type of system ? Liquid Is the feed ratio proportional to chlorine amount (1 to 1)? • 0 0 0 Is storage appropriate for cylinders? 0 ❑ • 0 # Is de -chlorination substance stored away from chlorine containers? • ❑ ❑ ❑ Comment: Are the tablets the proper size and type? 0 ❑ • ❑ Are tablet de -chlorinators operational? ❑ ❑ • ❑ Number of tubes in use? Comment: Page# 8 Permit: NC0024201 Owner - Facility: Roanoke River WWTP Inspection Date: 12/16/2021 Inspection Type: Compliance Evaluation Pumps-RAS-WAS Yes No NA NE Are pumps in place? •❑ ❑ ❑ Are pumps operational? •❑ ❑ ❑ Are there adequate spare parts and supplies on site? •❑ ❑ ❑ Comment: 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: Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑❑❑ • ❑ ❑ ❑ Laboratory Yes No NA NE 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 MOOD 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. Environment 1 in Greenville is contract laboratory. Influent Semolina Yes No NA NE # Is composite sampling flow proportional? 0 • 0 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 •❑ ❑ ❑ degrees Celsius)? Is sampling performed according to the permit? • 0 0 0 Comment: No influent flow meter. Page# 9 Permit: NC0024201 Owner - Facility: Roanoke River WWTP Inspection Date: 12/16/2021 Inspection Type: Compliance Evaluation 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 0 0 # Is proper temperature set for sample storage (kept at less than or equal to 6.0 • 0 0 0 degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type MOOD representative)? Comment: Page# 10