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Home My WebLink AboutWQ0032515_BIMS Report_20240628Compliance Inspection Report Permit:WQ0032515 Effective:12/01/21 Expiration:01/31/28 Owner :City of Durham SOC: Contact Person: Region: County: Directions to Facility: Durham Raleigh Brian Merritt Effective:Expiration:Facility:North Durham WRF 1900 E Club Blvd Durham NC 27704 Title:Phone:919-560-4384 Get on I-440W. Take US-70W to E Club Blvd in Oak Grove. Take exit 179 from I-85N/US15N. Sharp L onto E Club Blvd. Secondary ORC(s): Phone:Certification:Primary ORC: SINC,WWNC,System Classifications: On-Site Representative(s): Related Permits: WQ0003504 City of Durham - City of Durham Class B Residuals Program NC0023841 City of Durham - North Durham WRF Secondary Inspector(s): Primary Inspector: Inspection Date:Exit Time:Entry Time: Phone: 06/25/2024 09:15AM 10:30AM Chris Smith 919-791-4257 Facility Status: Permit Inspection Type: Reason for Inspection:Inspection Type: Not CompliantCompliant Routine Reclaimed Water Compliance Evaluation Question Areas: Treatment Flow Measurement-Water Use Records Treatment Flow Measurement Record Keeping Treatment Return pumps Treatment Disinfection End Use-Reuse (See attachment summary) Page 1 of 7 Inspection Date: Permit: Inspection Type : Owner - Facility: Reason for Visit: WQ0032515 06/25/2024 Compliance Evaluation City of Durham Routine Inspection Summary: On June 25, 2024, Chris Smith of the Raleigh Regional Office conducted a compliance evaluation inspection of the reclaimed water generation and bulk distribution system located at the Durham Water Reclamation Facility. This facility is permitted for operation of a reclaimed water generation and bulk distribution facility consisting of: the installation of an on-line turbidimeter and all associated piping, valves, controls, and appurtenances and the continued operation of reclaimed water generation from NPDES Permit No. NC0023841, two variable frequency drive (VFD) pumps to maintain pressure to the distribution system, a 4-inch overhead loading arm, a 3-inch quick connect fitting at ground level for distribution to customers, a sodium hypochlorite feed system with bulk tank and meter pump to supply chlorine to the pump feed system, a manual valve at the loading station with a hand held turbidimeter (for use prior to installation of on-line turbidimeter), flow meter, and residual chlorine monitor, a catch basin that drains to the headworks, and all associated piping, valves, controls, and appurtenances. The purpose of this inspection was to ensure compliance with the subject permit. During the inspection, the cooperation and assistance provided by Brian Merritt and Jason Cash was helpful and appreciated. This compliance evaluation inspection consisted of the following: •Review of the permit •Review of the owner/facility information •Review of ORC logbooks, calibration documentation, Non-Discharge Monitoring Reports (NDMR) and •On-site inspection of treatment components The current permit was effective December 1, 2021 and expires on January 31, 2028. The inspector reviewed the facilities Operation and Maintenance Plan, which was found to be adequate. The flowmeter used by the facility is a factory calibrated Seimens magmeter and cannot be field calibrated. The handheld turbidimeter calibration records were not available during the inspection. Brian Merritt stated during the inspection that he will provide calibration documentation as soon as possible. The facility is certified to monitor and collect two field parameters’ values (chlorine and turbidity) in house. A calibration log is maintained for the chlorimeter, but residual chlorine values are not a parameter that is required to be reported by the permit. Chlorine content is monitored by a SCADA connected monitor and maintained around 1ppm. Sodium Hypochlorite is added to the reclaimed water pump by quill at delivery as the UV disinfection system for the NPDES discharge is after the reclaimed water pumps. Residuals are managed under NPDES permit NC0023841. Reclaimed water is distributed to the reclaimed system by two (2) pumps and is used on site for equipment washing, seal water, odor control, firefighting (if necessary). The facility has not distributed any reclaimed water from the bulk distribution station in over a year. A Seimens magmeter is installed near the bulk loading station to track distribution. Turbidity and chlorine are recorded as water is pumped to customer tanks. Operation and Maintenance documents are maintained on the facility computer system and a printed copy was available during the inspection. All reclaimed water users and customers receive training from facility staff prior to receiving reclaimed water. Reclaimed water system components are properly color coded. Overall, the facility appears to be well-maintained and operated and in compliance with permit conditions. Note: The facility permit requires continuous turbidity monitoring once reclaimed water begins to be sent to the Mist Lake facility listed as PPI-003 in Attachment A in the permit. Until that time, the facility should continue to monitor turbidity when it is bulk distributed to customers using the above-mentioned hand-held turbidimeter. Additionally, until such time that any Page 2 of 7 Inspection Date: Permit: Inspection Type : Owner - Facility: Reason for Visit: WQ0032515 06/25/2024 Compliance Evaluation City of Durham Routine reclaimed water is distributed from the bulk filling station or to the Mist Lake facility, and as long as all generated reclaimed water continues to be used solely within the facility and returned to the treatment system, the facility may submit monthly Non-Discharge Monitoring Reports (NDMRs) indicating “No Flow” on the forms. Page 3 of 7 Inspection Date: Permit: Inspection Type : Owner - Facility: Reason for Visit: WQ0032515 06/25/2024 Compliance Evaluation City of Durham Routine Type Yes No NA NE Infiltration System Lagoon Spray, LR Activated Sludge Spray, LR Single Family Spray, LR Activated Sludge Drip, LR Activated Sludge Spray, HR Recycle/Reuse Single Family Drip Reuse (Quality) Yes No NA NETreatment Flow Measurement-Effluent Is flowmeter calibrated annually? Is flowmeter operating properly? Does flowmeter monitor continuously? Does flowmeter record flow? Does flowmeter appear to monitor accurately? Comment: Treatment Return pumps Yes No NA NE Are they in place? Are they operational? Comment: Treatment Disinfection Yes No NA NE Is the system working? Page 4 of 7 Inspection Date: Permit: Inspection Type : Owner - Facility: Reason for Visit: WQ0032515 06/25/2024 Compliance Evaluation City of Durham Routine Do the fecal coliform results indicate proper disinfection? Is there adequate detention time (>=30 minutes)? Is the system properly maintained? If gas, does the cylinder storage appear safe? Is the fan in the chlorine feed room and storage area operable? Is the chlorinator accessible? If tablets, are tablets present? Are the tablets the proper size and type? Is contact chamber free of sludge, solids, and growth? If UV, are extra UV bulbs available? If UV, is the UV intensity adequate? # Is it a dual feed system? Does the Stationary Source have more than 2500 lbs of Chlorine (CAS No. 7782-50-5)? If yes, then is there a Risk Management Plan on site? If yes, then what is the EPA twelve digit ID Number? (1000-____-____) If yes, then when was the RMP last updated? Comment: Record Keeping Yes No NA NE Is a copy of current permit available? Are monitoring reports present: NDMR? NDAR? Are flow rates less than of permitted flow? Are flow rates less than of permitted flow? Are application rates adhered to? Is GW monitoring being conducted, if required (GW-59s submitted)? Are all samples analyzed for all required parameters? Are there any 2L GW quality violations? Is GW-59A certification form completed for facility? Is effluent sampled for same parameters as GW? Do effluent concentrations exceed GW standards? Are annual soil reports available? # Are PAN records required? # Did last soil report indicate a need for lime? If so, has it been applied? Are operational logs present? Are lab sheets available for review? Page 5 of 7 Inspection Date: Permit: Inspection Type : Owner - Facility: Reason for Visit: WQ0032515 06/25/2024 Compliance Evaluation City of Durham Routine Do lab sheets support data reported on NDMR? Do lab sheets support data reported on GW-59s? Are Operational and Maintenance records present? Were Operational and Maintenance records complete? Has permittee been free of public complaints in last 12 months? Is a copy of the SOC readily available? No treatment units bypassed since last inspection? Comment: