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Home My WebLink AboutWQ0018755_Compliance Evaluation Inspection_20230316DocuSign Envelope ID: C8ACCAA6-9164-4175-AEEF-385E2F1C10F2 ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director Joel A Mingus Aqua North Carolina Inc 251 Merchant's Cir Hampstead, NC 28443 NORTH CAROLINA Environmental Quality March 27, 2023 SUBJECT: Compliance Inspection Report Castle Bay WWTP Non -discharge Permit No. WQ0018755 Pender County Dear Permittee: The North Carolina Division of Water Resources conducted an inspection of the Castle Bay WWTP on 3/16/2023. This inspection was conducted to verify that the facility is operating in compliance with the conditions and limitations specified in Non -discharge Permit No. WQ0018755. The findings and comments noted during this inspection are provided in the enclosed copy of the inspection report entitled "Compliance Inspection Report". There were no significant issues or findings noted during the inspection and therefore, a response to this inspection report is not required. If you should have any questions, please do not hesitate to contact Helen Perez with the Water Quality Regional Operations Section in the Wilmington Regional Office at 910-796-7215 or via email at helen.perez@ncdenr.gov. Sincerely, DocuSigned by: I ONE �Aarct Oti for 7F141 E73B6F3456... Morella Sanchez -King, Regional Supervisor Water Quality Regional Operations Section Wilmington Regional Office Division of Water Resources, NCDEQ ATTACHMENTS Cc: WQS Wilmington Regional Office Files Upload to Laserfiche D_E QZ� North Carolina Department of Environmental Quality I Division of Water Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405 910.796.7215 DocuSign Envelope ID: C8ACCAA6-9164-4175-AEEF-385E2F1C10F2 Compliance Inspection Report Permit: WQ0018755 Effective: 05/02/22 Expiration: 10/31/25 Owner : Aqua North Carolina Inc SOC: Effective: Expiration: Facility: Castle Bay WWTP County: Pender Castle Bay Dr Region: Wilmington Hampstead NC 28443 Contact Person: Joel A Mingus Title: Coastal Area Manager Phone: 910-270-1412 Directions to Facility: System Classifications: SI, WW2, Primary ORC: Michael Edward Cowell Certification: 1007662 Phone: Secondary ORC(s): On -Site Representative(s): On -site representative Joel A Mingus 910-270-1412 Related Permits: Inspection Date: 03/16/2023 Entry Time 08:30AM Exit Time: 09:30AM Primary Inspector: Helen I Perez DocuSignetd�by: Phone: 910-796-7387 E� n� Secondary Inspector(s): 1 D645B4A39694BE... 3/ 2 7/ 2 0 2 3 DocuSigned by: Reason for Inspection: Routine ?0"" °A, Inspection Type: Compliance Evaluation Permit Inspection Type: Reclaimed Water 7F141 E73B6F3456 . Facility Status: Compliant ❑ Not Compliant Question Areas: Treatment Flow Measurement -Effluent Treatment Flow Measurement -Influent Miscellaneous Questions Treatment Flow Measurement -Water Treatment Treatment Barscreen Use Records Treatment Filters Record Keeping Treatment Activated Sludge Treatment Clarifiers Treatment Disinfection Treatment Flow Measurement Treatment Return pumps End Use -Reuse Standby Power (See attachment summary) Page 1 of 7 DocuSign Envelope ID: C8ACCAA6-9164-4175-AEEF-385E2F1C10F2 Permit: WQ0018755 Owner - Facility: Aqua North Carolina Inc Inspection Date: 03/16/2023 Inspection Type : Compliance Evaluation Reason for Visit: Routine Inspection Summary: A routine compliance inspection of the Castle Bay WWTF was conducted on March 16, 2023. The purpose of the evaluation was to verify that the facility is operating in compliance with the conditions and limitations specified in Permit WQ0018755. Joel Mingus and Michael Cowell were present during the inspection. This facility is a 100,000 gpd reclaim water generation facility that irrigates the Castle Bay Golf Course. Average flow for the month of January 2023 was approximately 40,000 gpd. The newly constructed mechanical fine screen with wash press was put online in December 2022. Other improvements, completed last year, were the relining of the EQ tank and digester. The old flowmeter for the storage pond was located and replaced so application records from the golf course staff can be confirmed. In addition, the dirt road leading to the plant has been improved since the last inspection. A review of records show no effluent violations since the last inspection. MW-2 and MW-3 continue to have ammonia limit exceedances, and, as stated in previous inspection reports, the manged timber forest nearby could be a contributor. The operator stated that flow in the wells have been very low or none at all except for stagnate water, due to the dry conditions. Please mark dry well on the GW-59s during these conditions and do not sample if the well cannot be purged properly. The Wilmington Regional Office will continue to monitor the trends and evaluate the need for new wells. The facility is compliant with non -discharge permit WQ0018755. Please review the comment sections of the inspection report for more details. Page 2 of 7 DocuSign Envelope ID: C8ACCAA6-9164-4175-AEEF-385E2F1C10F2 Permit: WQ0018755 Owner - Facility: Aqua North Carolina Inc Inspection Date: 03/16/2023 Inspection Type : Compliance Evaluation Reason for Visit: Routine Type Yes No NA NE Infiltration System ❑ Single Family Spray, LR ❑ Lagoon Spray, LR ❑ Activated Sludge Spray, LR ❑ Activated Sludge Spray, HR ❑ Activated Sludge Drip, LR ❑ Recycle/Reuse ❑ Single Family Drip ❑ Reuse (Quality) Treatment Yes No NA NE Are Treatment facilities consistent with those outlined in the current permit? 0 ❑ ❑ ❑ Do all treatment units appear to be operational? (if no, note below.) 0 ❑ ❑ ❑ Comment: The construction of the mechanical fine screen with water press is complete and has been in operation since December of 2022. Treatment Flow Measurement -Influent Yes No NA NE Is flowmeter calibrated annually? ❑ ❑ ❑ Is flowmeter operating properly? ❑ ❑ ❑ Does flowmeter monitor continuously? ❑ ❑ ❑ Does flowmeter record flow? ❑ ❑ ❑ Does flowmeter appear to monitor accurately? ❑ ❑ ❑ Comment: Treatment Flow Measurement -Water Use Records Yes No NA NE Is water use metered? ❑ 1:10 ❑ Are the daily average values properly calculated? ❑ ❑ 0 ❑ Comment: Treatment Flow Measurement -Effluent Yes No NA NE Is flowmeter calibrated annually? 0 ❑ ❑ ❑ Is flowmeter operating properly? ❑ ❑ ❑ Does flowmeter monitor continuously? ❑ ❑ ❑ Does flowmeter record flow? ❑ ❑ ❑ Does flowmeter appear to monitor accurately? 0 ❑ ❑ ❑ Comment: The effluent flowmeter is used for reporting and was calibrated on 1/5/2023 by Delta Systems Environmental. Page 3 of 7 DocuSign Envelope ID: C8ACCAA6-9164-4175-AEEF-385E2F1C10F2 Permit: WQ0018755 Owner - Facility: Aqua North Carolina Inc Inspection Date: 03/16/2023 Inspection Type : Compliance Evaluation Reason for Visit: Routine Standby Power Yes No NA NE Is automatically activated standby power available? 0 ❑ ❑ ❑ Is generator tested weekly by interrupting primary power source? ❑ ❑ ❑ Is generator operable? ❑ ❑ ❑ Does generator have adequate fuel? ❑ ❑ ❑ Comment: The -generator is approximately 3 years old. It is tested weekly and was operational when tested during the inspection. Major preventive maintenance is performed annually. Treatment Barscreen Yes No NA NE Is it free of excessive debris? ❑ ❑ ❑ Is disposal of screenings in compliance? ❑ ❑ ❑ Are the bars spaced properly? ❑ ❑ ❑ Is the unit in good condition? 0 ❑ ❑ ❑ Comment: The newly constructed mechanical fine screen with wash press was put online in December 2022. From this sceen, influent flows through the 2 older manual barsceens before entering_ the EQ tank. Treatment Activated Sludge Yes No NA NE Is the aeration mechanism operable? 0 ❑ ❑ ❑ Is the aeration basin thoroughly mixed? 0 ❑ ❑ ❑ Is the aeration equipment easily accessed? ❑ ❑ ❑ Is Dissolved Oxygen adequate? ❑ ❑ ❑ Are Settleometer results acceptable? ❑ ❑ ❑ Is activated sludge an acceptable color? 0 ❑ ❑ ❑ Comment: Process control consists of daily pH and DO monitorinq and weekly settleometer tests. Treatment Clarifiers Yes No NA NE Are the weirs level? ❑ ❑ ❑ Are the weirs free of solids and algae? ❑ ❑ ❑ Is the scum removal system operational? ❑ ❑ ❑ Is the scum removal system accessible? ❑ ❑ ❑ Is the sludge blanket at an acceptable level? ❑ ❑ ❑ Is the effluent from the clarifier free of excessive solids? ❑ ❑ ❑ Comment: Effluent from the dual clarifiers was free of solids Treatment Return pumps Yes No NA NE Are they in place? 0 ❑ ❑ ❑ Are they operational? 0 ❑ ❑ ❑ Comment: No comment. Treatment Filters Yes No NA NE Page 4 of 7 DocuSign Envelope ID: C8ACCAA6-9164-4175-AEEF-385E2F1C10F2 Permit: WQ0018755 Owner - Facility: Aqua North Carolina Inc Inspection Date: 03/16/2023 Inspection Type : Compliance Evaluation Reason for Visit: Routine Is the filter media present? 0 ❑ ❑ ❑ Is the filter media the correct size and type? ❑ ❑ ❑ Is the air scour operational? 0 ❑ ❑ ❑ Is the scouring acceptable? 0 ❑ ❑ ❑ Is the clear well free of excessive solids? 0 ❑ ❑ ❑ Is the mud well free of excessive solids and filter media? N ❑ ❑ ❑ Does backwashing frequency appear adequate? 0 ❑ ❑ ❑ Comment: Backwash pets pumped to the 5-day upset pond so it can be fed back to the headworks at a slower pace. Treatment Disinfection Yes No NA NE Is the system working? 0 ❑ ❑ ❑ 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 Ibs 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: No 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)? ❑ ❑ ❑ Page 5 of 7 DocuSign Envelope ID: C8ACCAA6-9164-4175-AEEF-385E2F1C10F2 Permit: WQ0018755 Owner - Facility: Aqua North Carolina Inc Inspection Date: 03/16/2023 Inspection Type : Compliance Evaluation Reason for Visit: Routine Are all samples analyzed for all required parameters? 0 ❑ ❑ ❑ Are there any 2L GW quality violations? 0 ❑ ❑ ❑ Is GW-59A certification form completed for facility? ❑ ❑ ❑ Is effluent sampled for same parameters as GW? 0 ❑ ❑ ❑ Do effluent concentrations exceed GW standards? ❑ 0 ❑ ❑ Are annual soil reports available? ❑ ❑ 0 ❑ # Are PAN records required? ❑ ❑ 0 ❑ # Did last soil report indicate a need for lime? ❑ ❑ 0 ❑ If so, has it been applied? ❑ ❑ 0 ❑ Are operational logs present? 0 ❑ ❑ ❑ Are lab sheets available for review? 0 ❑ ❑ ❑ Do lab sheets support data reported on NDMR? 0 ❑ ❑ ❑ Do lab sheets support data reported on GW-59s? ❑ ❑ ❑ Are Operational and Maintenance records present? 0 ❑ ❑ ❑ Were Operational and Maintenance records complete? 0 ❑ ❑ ❑ Has permittee been free of public complaints in last 12 months? 0 ❑ ❑ ❑ Is a copy of the SOC readily available? ❑ ❑ 0 ❑ No treatment units bypassed since last inspection? 0 ❑ ❑ ❑ Comment: Monitoring reports, lab results, and COCs were available for review and appeared to be complete. Operation and maintenance records were detailed. MW-2 and MW-3 continue to have ammonia limit exceedances, and, as stated in previous inspection reports, the manged timber forest nearby could be a contributor. The operator stated that flow in the these wells have been very low or none at all except for stagnate water due to the dry conditions. The Wilmington Regional Office will continue to monitor the trends and evaluate the need for new wells. End Use -Reuse Is the acreage in the permit being utilized? Does the acreage specified in the permit correspond to the measured acreage at the site? Are all essential units provided in duplicate? Is an automatically activated standby power source available? Is the equalization capacity adequate? Is aerated flow equalization present? Has the turbidity meter been calibrated in the last 12 months? Does the turbidity meter have recording capabilities? Is all flow diverted at the appropriate times? Is all upset wastewater diverted from reuse storage unit? Is all upset wastewater treated, retreated, or disposed of acceptably? Is upset wastewater treated prior to discharge to irrigation storage? Yes No NA NE ■❑❑❑ ■❑❑❑ ■❑❑❑ ■❑❑❑ • ❑ 110 • ❑ ❑ ❑ ■❑❑❑ Page 6 of 7 DocuSign Envelope ID: C8ACCAA6-9164-4175-AEEF-385E2F1C10F2 Permit: WQ0018755 Owner - Facility: Aqua North Carolina Inc Inspection Date: 03/16/2023 Inspection Type : Compliance Evaluation Reason for Visit: Routine Is public access restricted from irrigation area during active site use? 0 ❑ ❑ ❑ If golf course, is a sign posted in plain sight on the club house? ❑ ❑ ❑ Is the cover crop acceptable? 0 ❑ ❑ ❑ Are buffers adequate? 0 ❑ ❑ ❑ Is the site free of ponding/runoff? 0 ❑ ❑ ❑ Is the acreage in the permit being utilized? 0 ❑ ❑ ❑ Is the application equipment acceptable? ❑ ❑ ❑ Is the application area free of limiting slopes? 0 ❑ ❑ ❑ How close is the closest water supply well? ❑ ❑ ❑ Are any supply wells within the CB? ❑ ❑ ❑ Are any supply wells within 250' of the CB? ❑ ❑ ❑ Is municipal water available in the area? ❑ ❑ ❑ Are GW monitoring wells required? 0 ❑ ❑ ❑ Are GW monitoring wells located properly w/ respect to RB and CB? 0 ❑ ❑ ❑ Are GW monitoring wells properly constructed, including screened interval? ❑ ❑ ❑ Comment: The turbidity meter was calibrated on 1/5/2023 by Delta Systems Environmental. The 25,OOOgal EQ tank high level alarm was operational during the inspection and alerted the operator by phone. The 5-day upset pond had a free board of 4.5 feet and upset water is automatically diverted to the pond. Reclaim usage signs are posted at the golf course, the entrance to the wastewater plant and the gate to the storage pond located across the second entrance to the Castle Bay Subdivsion. The storage pond has an operable flowmeter located at the outlet so application records from the golf course staff can be confirmed. Page 7 of 7