The URL can be used to link to this page

Home My WebLink AboutWQ0003299 Inspection.docxDocusign Envelope ID: 5DA8BAAO-7FOC-4A36-B3B8-7D120013lDCO ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director The Honorable Geraldine Langford Town of Seaboard Post Office Box 327 Seaboard, NC 27876 NORTH CAROLINA Environmental Quality August 7, 2024 Subject: Compliance Evaluation Inspection Permit # WQ0003299 Facility: Town of Seaboard WWTF Wastewater Irrigation System Northhampton County Mrs. Langford, On July 26, 2024, Jim Westcott from the Raleigh Regional Office visited your Wastewater treatment and irrigation System to evaluate compliance with the subject permit. The assistance of Christen Bass, Public Works Director, Jeff Long, Operator in Responsible Charge (ORC), Joseph Simonowich, Kevin Simpson and Colin Clary during the inspection was appreciated. The facility is permitted for the continued operation of a 134,000 gallon per day (GPD) wastewater treatment and irrigation facility consisting of the continued operation and subsequent abandonment of: the existing bar screen; the existing flow meter; the existing high -density polyethylene (HDPE) liner system in the 7.425 million gallon (MG) effluent storage pond; the existing 293 irrigation risers, riser piping, and sprinkler heads from the irrigation mains; and all associated piping, valves, controls, and appurtenances; the replacement of the 293 existing irrigation risers, riser piping, and sprinkler heads from the irrigation mains to be replaced with identical sprinkler heads and risers; and all associated piping, valves, controls, and appurtenances; the construction and operation of. a new mechanical bar screen with a manually cleaned bar screen bypass; a new now measuring manhole with a Parshall flume and an ultrasonic flowmeter; a new backup transfer pump station connecting the two stabilization lagoons consisting of a 400 gallon per minute (GPM) dry prime pump mounted on a trailer and 300 linear feet (LF) of 4-inch force main; a new 60 mil HDPE liner system for the 7.425 million gallon (MG) effluent storage pond with a leak detection and vent system; a new 125 kilowatt (kW) standby power generator; and all associated piping, valves, controls, and appurtenances; the continued operation of: 2,825 LF of 10-inch sewer line; two 1.5 acre stabilization lagoons in series; chlorination facilities; a 1.5 MG holding basin with two 200 GPM vertical turbine transfer pumps; a 7.245 MG effluent storage pond; an irrigation pumping system with three 235 GPM centrifugal pumps; a 35.1 acre spray irrigation area with three fields and 91 nozzles per field; and all associated piping, valves, controls, and appurtenances; and the to serve the Town of Seaboard WWTF, with no discharge of wastes to surface waters. NORTH CAROLINAD � � North Carolina Department of Environmental Quality I Division of Water Resources Raleigh Regional Office 1 3800 Barrett Drive I Raleigh, North Carolina 27609 919.791.4200 Docusign Envelope ID: 5DA8BAAO-7FOC-4A36-B3B8-7D12O0131DC0 The permit, which was issued February 10, 2023, is effective through March 31, 2029. Division records indicate the required annual fee for the period ending July 31, 2025, due August 15, 2024, has been paid. Inspection criteria consisted of the following: • Review of permit conditions. • Evaluation of facility information. • Review of logbook, operation, and maintenance plan (O&M), calibration records and Non -Discharge Monitoring Report (NDMR), Non -Discharge Application Report (NDAR) and GW-59 records. • On -site inspection of Facultative lagoon wastewater system and distribution components. Findings during the inspection were as follows: The lagoon system receives flow from three primary lift stations: NC-305, Pine Street and West - Frazer station. Wastewater enters the facility headworks from a ten -inch collection line into a channel with a Raptor micro strainer screw screen which collects organic and non -organic materials which are then captured by a perforated screening trough and removed from the channel by a rotating auger. As the debris is removed, dual wash water zones rinse additional fecal material back into the treatment process. An inline SIEMENS channel transducer measures the influent level and cycles the auger and spray down nozzles. A dual helix auger then compacts and dewaters screenings before they are deposited into a bagging system to fully eliminate odors. The system has a vault with a flow transducer for the Parshall flume which records the influent flow to the Facultative lagoon system for treatment. There is also an inline pH sensor. Flow enters the 1.5-acre primary stabilization lagoon via gravity and is transferred to the secondary lagoon by means of a new Godwin CD 103M portable diesel close -coupled centrifugal pump recently purchased in March of 2023. The freeboard level of the lagoon was measured at 6.8'. The discharged flow from the secondary lagoon is then transferred to a third lagoon for further treatment and settling by an integrated standpipe via gravity. The secondary lagoon freeboard level was measured at 3.6'. Lagoons #2 and #3 are in a parallel configuration for improved treatment performance. Flow is then pumped upslope to the 7.245 MG final lagoon by two inline US Motors 60 Hz/200 GPM vertical Turbine Pumps. The final lagoon had a freeboard measurement of 4'. Final discharge from the lagoon to the spray field is achieved by three inline Baldor/Reliance pumps at a flow rate of 250 GPM to the spray field(s). The spray fields are composed of three zones composed of 91 nozzles per field for a total of 293 spray heads. An integrated interlock with a Pulsatron peristaltic pump to the control pumps supplies a. 12 5 percent sodium hypochlorite solution prior to discharge to the spray fields. The facility maintains three irrigation spray fields totaling 3 5. 10 acres planted with hardwood trees. Facility staff performs spray field maintenance during the late season -winter months to maintain vegetation overgrowth at manageable levels. The spray heads appeared to be accessible for maintenance. Public access to the facility and corresponding spray fields is restricted by a locked gate at the entrance of the facility with appropriate signage. An evaluation of the fields was performed during the inspection and the spray heads appeared to be functioning properly. There was difficulty to determine if ponding was of concern as the soil had been saturated due to excessive precipitation. The 7.425-million-gallon storage lagoon geomembrane had three large gas bubbles in the liner resulting in a significant reduction in storage capacity. REQ5 North Carolina Department ofEnvironmental Quality I Division ofWater Resources 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH CAROLINA 919.707.9000 onparhnem of EmironmanW 9uallly Docusign Envelope ID: 5DA8BAAO-7FOC-4A36-B3B8-7D120013lDCO Monitoring wells 6, 7, 8, 9 and 10 (MW-6, MW-7, MW-8, MW-9, MW-10) appeared to be well maintained. All the well casings were correctly labeled and locked. The concrete cap at the base of monitoring well 9 (MW-9) had been repaired since the previous inspection. The facility has one significant Industrial User on the system which is the West Frazer Lumber Mill which generates half of the total influent flow of the system. The mill produces Oriented Strand Board (OSB), Particle board, and Medium Density Fiberboard (MSB). During January of 2023, spray field heads, and corresponding risers in need of repair were replaced. Repairs to the discharge lines were also conducted at this time by KBS contracting. Monthly monitoring reports detailing influent rate and spray field application volume were accurate and complete. A FOXBORO IMT25 I/A series Magnetic flow meter records the total discharge volume to the spray fields. The last calibration date was March 13, 2024, and due September 30, 2024. Associated flow meters at the facility are calibrated semi-annually by FCX Services. A facility operation and maintenance plan, spill response plan and maintenance log were available on the day of this inspection. Calibration of pH and chlorine residual is conducted on site. Permit required monthly sampling of effluent and groundwater analysis is conducted three times a year by Waypoint Analytical. Groundwater analysis (GW-59) was last conducted February and June of 2024. Previous Ammonia exceedances during 2023 have been addressed. The facility is in compliance with 2L standards. Records were available for review. The next monitoring event is scheduled for October. A representative soil analysis was performed on the spray fields on August 24, 2023, and evaluated by North Carolina Department of Agriculture and Community Services (NCDACS). The 2024 collection/analysis is scheduled for August 2024. A Kohler APM402 diesel generator supplies facility power in the event of a power outage. The generator is a new installation along with the portable bypass pump in 2023. The last service was conducted in November 2023 by Nixon Power Services Company. The generator was tested under load at the time of inspection. The Town of Seaboard has pursued additional testing outside of the required permit requirements to evaluate constituents of concern in the current system which will be processed in the new treatment facility. Sample locations selected for analysis were raw influent, facultative lagoon #2 and post chlorinated effluent. Facility staff are in the process of attaining the required certification level to ensure adequate coverage for future expansion of the new treatment facility. Since the previous inspection, the facility has undergone significant improvements in the headworks, purchase of a new generator and portable bypass pump, purchase and replacement of all spray heads including corresponding discharge piping repairs. The Town of Seaboard is in process of attaining competitive bids for the construction of a new wastewater treatment facility including the installation of a new lagoon which will allow for the repairs and relining of the 7.425-million-gallon storage lagoon. The Town of Seaboard has been actively pursuing extensive upgrades to the facility through an Economic Development Administration (EDA) grant and has made substantial progress to ensure compliance standards are adhered to ID �`y� North Carolina Department of Environmental Quality I Division of Water Resources r/ 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH CAROLINA 919.707.9000 onparhnem of EmironmanW 9uallly Docusign Envelope ID: 5DA8BAAO-7FOC-4A36-B3B8-7D12O0131DC0 and met in accordance with the subject permit. The grant has enabled the town to replace the headworks, a new generator, bypass pump and spray head replacement(s) thus far. Please continue to periodically inspect and evaluate the wastewater spray irrigation system components are properly maintained and operating as designed. Maintain all associated operational records onsite for a period of five years as required by the subject permit. If you have questions or comments about this inspection or the requirements to take corrective action (if applicable), then please contact Jim Westcott at james.westcott(&deq.nc.gov or 919- 791-4247. Sincerely, AD.o'c'u.Siwgne'd by: IVUI (ntil� W 372DCBCB61EE4A8... Michael Hall, Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NCDEQ Cc: Laserfiche REQ5 North Carolina Department ofEnvironmental Quality I Division ofWater Resources 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH CAROLINA 919.707.9000 onparhnem of EmironmanW 9uallly