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Home My WebLink AboutNC0026051_Durham County Triangle WWTP CEI_20220330ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. NORTH CAROLINA Director F.nvirotunental Quality March 30, 2022 Stephanie Brixey, Deputy Director of E&ES/POTW Director Durham County Triangle WWTP 5926 NC Highway 55 East Durham, NC 27713 Subject: Compliance Evaluation Inspection Durham County Triangle WWTP NPDES Permit Number NC0026051 Durham County Dear Ms. Brixey: On March 29, 2022, Mitch Hayes and Cassidy Kurtz of the Raleigh Regional Office conducted the subject inspection. The assistance provided by Amy Moore, Compliance Manager, Wade Shaw, Utilities Superintendent, and Shawn Davis, Operator in Responsible Charge, was greatly appreciated. Below is a list of findings developed from the inspection and review of the permit: 1. The current permit expired April 30, 2016. A renewal application was submitted September 10, 2015. Please continue to operate under the last issued permit until a new permit is issued. 2. The 12.0 MGD facility consists of the following units: two mechanical bar screens; odor control system with sodium hydroxide and sodium hypochlorite feed; influent pump station with six (6) pumps; Parshall flume and influent flow meter; two (2) mechanical grit removal system; influent composite sampler; five -stage biological nutrient removal system with 3 trains; four (4) secondary clarifiers; five (5) shallow, high rate tertiary sand filters; two (2) UV banks with 56 bulbs per bank; post aeration; reclaimed water system; two (2) sludge holding tanks; three (3) centrifuges; truck loading station; four (4) on -site generators; and SCADA system to monitor and operate entire plant. 3. At the time of inspection, one of two grit classifiers was in operation and is used concurrently; one and two BNR trains were in operation. The third BNR train was being retrofitted with new diffusers; two secondary clarifiers were on line. One secondary clarifier was down due to a broken gear box; the other secondary was empty; one tertiary filter was down for maintenance; one sludge tank was being wasted the other sludge tank was empty. 4. Sludge is hauled and composted by McGill Environmental. Sludge is hauled every day. North Carolina Department of Environmental Quality I Division of Water Resources Raleigh Regional Office I 3800 Barren Dnve I Raleigh, North Carolina 27609 919.791.4200 5. The WWTP laboratory is certified to analyze ammonia, BOD, TRC, conductivity, DO, fecal coliform, pH, temperature, and TSS. All calibration logs were present and up to date. All other parameters are analyzed by Meritech. All buffers were within expiration date. Fecal and BOD incubators and refrigerators were kept at proper temperatures. 6. Discharge Monitoring Reports for the period March 2020 through January 2022 were reviewed for compliance with permit limits and monitoring requirements. There were no violations listed for the review period. 7. Commercial lab results, chain of custody records, and bench sheets were compared with data submitted on the Discharge Monitoring Report (DMR) for October 2021 and January 2022. No discrepancies were noted. I would like to thank everyone involved with this inspection for their time and assistance. If you have any questions concerning this letter or the inspection, please contact Mitch Hayes at 919.791.4261 or at mitch.hayes@,ncdenr.gov cc: Attachment, Laserfiche Sincerely, /74_ Vanessa Manuel, Assistant Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NC DEQ North Carolina Deputment of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611 919 707.9000 United States Environmental Protection Agency EPA Washington, D.C. 20460 Water Compliance Inspection Report FORTI Approved. OMB No. 2040-0057 Approval expires 8-31-98 Section A: National Data System Coding (i.e., PCS) Transaction Code NPDES yr/molday Inspection 1 u 2 u 3 I NC0026051 111 121 22/03/29 117 Type 18 Li IIIIIII Inspector 19 I Fac Type s I 20I i 21III111 1IIIII I II II I II IIII I I II III II I I r6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA 671 I 70 hi 1 71 I I 72 1 s 1 hi_u LJ Reserved 731 I I74 71 I I I 1 1 1 1 1 1 I 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) Triangle WWTP 5926NCHwy55E Durham NC 27713 Entry Time/Date 10:00AM 22/03/29 Permit Effective Date 13/02/01 Exit Time/Date 11:30AM 22/03/29 Permit Expiration Date p 16/04/30 Name(s) of Onsite Representative(s tles(s)/Phone and Fax Number(s) 1// Shawn Demetris Davis//919-560-9036 / Shawn Demetris Davis/ORC/919-560-9036/ Stephanie A Brixey/Deputy Director/919-560-9034 /9195448590 Other Facility Data Name, Address of Responsible Officialaitle/Phone and Fax Number Vincent Chirchella,5926 Hwy 55 E Durham NC 277131/919-560-9039/ Contacted Yes Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Flow Measurement Operations & Maintenar Records/Reports Self -Monitoring Progran Sludge Handling Dispo; IIIFacility 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)nAgency/Office/Phone and Fax Numbers /� Date Mitchell S Hayes /1'i U(LWGt S, Cv1?P/j DWR/RRO WQ/919-791-42001 0 3j , 3I , 2_,o Z 2 Cassidy Kurtz E'4/3--Ar oke u1/4.vist3v DWR/RRO WQ/919-807-6388/ Signature of Management Q A eviewer Agency/Office/Phone and Fax Numbers Date */' „ rii/ -�� 7/9- 9/- 4(z32- 74,,1-, ; 7,c5a2.- EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# 1 1 NPDES NC0026051 yr/mo/day 22/03/29 I17 Inspection Type 18E�i (Cont.) 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) The current permit expired April 30, 2016. A renewal application was submitted September 10, 2015. Please continue to operate under the last issued permit until a new permit is issued. The 12.0 MGD facility consists of the following units: two mechanical bar screens; odor control system with sodium hydroxide and sodium hypochlorite feed; influent pump station with six (6) pumps; Parshall flume and influent flow meter; two (2) mechanical grit removal system; influent composite sampler; five -stage biological nutrient removal system with 3 trains; four (4) secondary clarifiers; five (5) shallow, high rate tertiary sand filters; two (2) UV banks with 56 bulbs per bank; post aeration; reclaimed water system; two (2) sludge holding tanks; three (3) centrifuges; truck loading station; four (4) on -site generators; and SCADA system to monitor and operate entire plant. At the time of inspection, one of two grit classifiers was in operation and is used concurrently; one and two BNR trains were in operation. The third BNR train was being retrofitted with new diffusers; two secondary clarifiers were on line. One secondary clarifier was down due to a broken gear box; the other secondary was empty; one tertiary filter was down for maintenance; one sludge tank was being wasted the other sludge tank was empty. Sludge is hauled and composted by McGill Environmental. Sludge is hauled every day. The WWTP laboratory is certified to analyze ammonia, BOD, TRC, conductivity, DO, fecal coliform, pH, temperature, and TSS. All calibration logs were present and up to date. Alt other parameters are analyzed by Meritech. All buffers were within expiration date. Fecal and BOD incubators and refrigerators were kept at proper temperatures. Discharge Monitoring Reports for the period March 2020 through January 2022 were reviewed for compliance with permit limits and monitoring requirements. There were no violations listed 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 and January 2022. No discrepancies were noted. Page# 2 Permit: NC0026051 Owner - Facility: Triangle WWTP Inspection Date: 03/29/2022 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: Yes No NA NE ▪ ❑ ❑ ❑ • ❑ ❑ ❑ 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? • ❑ ❑ ❑ # Are there any special conditions for the permit? ❑ 0 • ❑ Is access to the plant site restricted to the general public? •❑ ❑ ❑ Is the inspector granted access to all areas for inspection? •❑ ❑ ❑ Comment. Permit expired April 30, 2016. Renewal application was submitted September 10.2015. 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? • ❑ ❑ 0 Is the backup operator certified at one grade less or greater than the facility • ❑ ❑ ❑ classification? Page# 3 Permit: NC0026051 Owner - Facility: Triangle WWTP Inspection Date: 03/29/2022 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: Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? • 0 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 • 0 Comment: Effluent appeared clear with little foam and no solids. Flow Measurement - Influent Yes No NA NE # Is flow meter used for reporting? 0 • 0 0 Is flow meter calibrated annually? 1 ❑ ❑ ❑ Is the flow meter operational? ■ 0 0 ❑ (If units are separated) Does the chart recorder match the flow meter? 0 0 ■ 0 Comment Not used for reporting. Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? • 0 0 0 Is flow meter calibrated annually? • 0 0 0 Is the flow meter operational? • 0 0 0 (If units are separated) Does the chart recorder match the flow meter? 0 ❑ M 0 Comment: All meters calibrated 01.04.2022. Chemical Feed Yes No NA NE Is containment adequate? • 0 0 0 Is storage adequate? • 0 0 ❑ Are backup pumps available? • 0 0 0 Is the site free of excessive leaking? •❑ ❑ ❑ Comment. sodium aluminnate for P removal, Methanol for N removal. Pump Station - Influent Is the pump wet well free of bypass lines or structures? • Yes No NA NE ❑ ❑ ❑ Page# 4 Permit: NC0026051 Owner - Facility: Triangle WWTP Inspection Date: 03/29/2022 Inspection Type: Compliance Evaluation Pump Station - Influent Yes No NA NE Is the wet well free of excessive grease? 0 ❑ 0 • Are all pumps present? • ❑ ❑ 0 Are all pumps operable? • ❑ 0 0 Are float controls operable? ❑ ❑ ❑ ■ Is SCADA telemetry available and operational? • 0 0 0 Is audible and visual alarm available and operational? ❑ ❑ ❑ Comment. All influent headworks are covered for odor control. 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. One is used concurrently with the other. 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: One is used concurrently with the other. Yes No NA NE CI • • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE CI • • ❑ ❑ ❑ MI ❑ ❑ ❑ • ❑ ❑ ❑ 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 0 ❑ Is the basin free of excessive grease? • 0 0 ❑ Are all pumps present? •❑ ❑ ❑ Are all pumps operable? •❑ ❑ ❑ Page# 5 Permit: NC0026051 Owner - Facility: Triangle WWTP Inspection Date: 03/29/2022 Inspection Type: Compliance Evaluation Equalization Basins Yes No NA NE Are float controls operable? II000 Are audible and visual alarms operable? 0 ❑ ❑ • # Is basin size/volume adequate? ■ ❑ ❑ ❑ Comment: 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? 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 retum rate acceptable (low turbulence)? Is the overflow clear of excessive solids/pin floc? Is the sludge blanket level acceptable? (Approximately'/. of the sidewall depth) Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ ▪ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ 11000 ■ ❑❑❑ • Cl ❑ ❑ Comment: Sludge blankets are kept around 2 feet. Two secondary clarifiers were in use. One was down for a broken gear box and the other was empty. 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? M100E1 Is the foam the proper color for the treatment process? •❑ ❑ ❑ Does the foam cover less than 25% of the basin's surface? • 0 ❑ ❑ Is the DO level acceptable? • 0 ❑ ❑ Is the DO level acceptable?(1.0 to 3.0 mg/I) •❑ ❑ ❑ Comment: Two BNR trains were being operating. The third train was being retorfitted with diffussers. Nutrient Removal Yes No NA NE Page# 6 Permit: NC0026051 Owner - Facility: Triangle WWTP Inspection Date: 03/29/2022 Inspection Type: Compliance Evaluation Nutrient Removal Yes No NA NE # Is total nitrogen removal required? • 0 0 0 # Is total phosphorous removal required? • 0 0 0 Type Biological # Is chemical feed required to sustain process? 0 • 0 0 Is nutrient removal process operating properly? • 0 0 0 Comment• sodium aluminnate for P removal. Methanol for N removal. Filtration (High Rate Tertiary) Yes No NA NE Type of operation: Down flow Is the filter media present? • 0 ❑ 0 Is the filter surface free of clogging? • 0 ❑ Cl Is the filter free of growth? •❑ ❑ ❑ Is the air scour operational? •❑ ❑ ❑ Is the scouring acceptable? • 0 0 ❑ Is the clear well free of excessive solids and filter media? MOOD Comment: One tertiary filter was down for maintenance. Disinfection - UV Yes No NA NE Are extra UV bulbs available on site? • 0 0 0 Are UV bulbs clean? MOOD Is UV intensity adequate? 11 0 0 0 Is transmittance at or above designed level? •❑ ❑ ❑ Is there a backup system on site? • 0 0 0 Is effluent clear and free of solids? • ❑ ❑ ❑ Comment: Standby Power Yes No NA NE Is automatically activated standby power available? 11 0 0 0 Is the generator tested by interrupting primary power source? MOOD Is the generator tested under Toad? • 0 0 0 Was generator tested & operational during the inspection? 0 • 0 0 Do the generator(s) have adequate capacity to operate the entire wastewater site? 11 0 0 0 Page# 7 Permit: NC0026051 Owner - Facility: Triangle WWTP Inspection Date: 03/29/2022 Inspection Type: Compliance Evaluation Standby Power Yes No NA NE Is there an emergency agreement with a fuel vendor for extended run on back-up • ❑ ❑ ❑ power? Is the generator fuel level monitored? • ❑ ❑ 0 Comment: Generators are operated under load once a month. Pumps-RAS-WAS Yes No NA NE Are pumps in place? • 0 0 ❑ Are pumps operational? • ❑ 0 0 Are there adequate spare parts and supplies on site? • 0 0 ❑ Comment: There are 4 RAS and 2 WAS Laaoons Yes No NA NE Type of lagoons? Facultative # Number of lagoons in operation at time of visit? 1 Are lagoons operated in? # Is a re -circulation line present? • DOD Is lagoon free of excessive floating materials? • ODD # Are baffles between ponds or effluent baffles adjustable? ❑ 0 • ❑ Are dike slopes clear of woody vegetation? • 0 ❑ ❑ Are weeds controlled around the edge of the lagoon? •❑ ❑ ❑ Are dikes free of seepage? 100E10 Are dikes free of erosion? •❑ ❑ ❑ Are dikes free of burrowing animals? •❑ ❑ ❑ # Has the sludge blanket in the lagoon (s) been measured periodically in multiple • ❑ ❑ ❑ locations? # If excessive algae is present, has barley straw been used to help control the growth? 0 0 • 0 Is the lagoon surface free of weeds? • 0 0 0 Is the lagoon free of short circuiting? 0 0 • 0 Comment: 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 8 Permit: NC0026051 Owner - Facility: Triangle WWTP Inspection Date: 03/29/2022 Inspection Type: Compliance Evaluation Laboratory Yes No NA NE # Is proper temperature set for sample storage (kept at Tess 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 The WWTP laboratory is certified to analyze ammonia, BOD, TRC, conductivity, DO, fecal coliform, pH, temperature, and TSS. All calibration lops were present and up to date. All other parameters are analyzed by Meritech. Influent Sampling Yes No NA NE # Is composite sampling flow proportional? MOOD 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? MOOD Comment: Effluent Sampling Yes No NA NE Is composite sampling flow proportional? • 0 0 0 Is sample collected below all treatment units? •❑ ❑ ❑ Is proper volume collected? ■ ❑ ❑ ❑ Is the tubing clean? •❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 111100 degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type •❑ ❑ ❑ representative)? Comment: Page# 9 1 1 L —• ■ ■ • ■ ■ r • ▪ • r4 -- a+ ••hp •sir■ ♦u III! ••14.170.172:11ir II - III .11 11 I' 1 P1 If . r '. �� F. 1.,F: a ■ ' h., ' hi ■ I . *_ - 1 r' - 1 1I, ■ IT.. ' 1 1 1 1 1� ■ I �f'I , 111 # L 1 _1 :..I , -•- I '_:: I 111. I F IIni II . M I lek 111 1 I. II ■i I- I ■1 •■a1 I ■r, •■ 1 _ - 1 1 I 1.• I I I, I ,.. 1\ .,. • 9:: -' _ • 1 1 1 A' r' - 1 1 I 1 i1 • f ..1■- l• I�M. 11 �11'J ±— Ali '- , 1 ■ • _ I ■ ,, 1 _ I 1 • I . 1 • 11 II m 1 •■ 1. I ■ 11 I I I I i 1 ,_ ■ •..� _ 1 - 1 , 1 1 1 1r II ■1 '. 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