WQ0023261_Inspection_20220428

DocuSign Envelope ID: A6D58F3E-2F48-4B54-B254-51D53B24F357
Compliance Inspection Report
Permit: WQ0023261 Effective: 10/01/20
SOC: Effective:
County: Onslow
Region: Wilmington
Contact Person: Edward M Caron
Expiration: 10/31/26
Expiration:
Title:
Owner : Onslow Water and Sewer Authority
Facility: Swansboro WWTP
199 Williams Rd
Swansboro NC 28584
Phone: [phone]
Directions to Facility:
Approximately 0.25 miles southeast of the intersection of SR 1511 and SR 1512 at the Town of Swansboro WWTP site and also
northeast of the intersection of SR 1432 adn SR 1744
System Classifications: WW3.,
Primary ORC: Mark Curtis Young
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Inspection Date: 04/28/2022
Primary Inspector: Geoff Kegley
Secondary Inspector(s):
Entry Time 10:30AM
DocuSigned by:
G'aa#
"-CD17E2515D3B417...
Reason for Inspection: Routine
Permit Inspection Type: High Rate Infiltration
Facility Status: Compliant ❑ Not Compliant
Question Areas:
▪ Treatment Flow Measurement -Effluent
▪ Treatment Flow Measurement -Water
Use Records
▪ Treatment Filters
▪ Treatment Sludge Storage/Treatment
▪ End Use -Infiltration
▪ Standby Power
(See attachment summary)
Certification: 1001105
Exit Time: 12:30PM
Phone: [phone]
Phone:
Inspection Type: Compliance Evaluation
▪ Treatment Flow Measurement -Influent
▪ Treatment
▪ Record Keeping
▪ Treatment Clarifiers
▪ Treatment Flow Measurement
▪ Wells
▪ Miscellaneous Questions
▪ Treatment Barscreen
▪ Treatment Activated Sludge
▪ Treatment Disinfection
▪ Treatment Return pumps
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DocuSign Envelope ID: A6D58F3E-2F48-4B54-B254-51D53B24F357
Permit: WQ0023261 Owner - Facility: Onslow Water and Sewer Authority
Inspection Date: 04/28/2022 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
Inspection Summary:
A routine compliance inspection was conducted at the Swansboro WWTF and disposal site on April 28, 2022. The
evaluation was to verify that the facility is operating in compliance with the conditions and limitations specified in Permit
WQ0023261. The primary ORC, Mark Young, was present during the inspection and was very helpful providing assistance
throughout the inspection.
The facility consists of:
• 123,00 gallon EQ basin
• Mechanical cylindrical screen with screw conveyor, vortex grit chamber and manual bar screen
• Two 300,00 gallon oxidation ditches
• Two 22' clarifiers and one 32' clarifier
• Dual rotating cloth disk filters
• UV disinfection
• 4.28 MG 5-day upset pond
• Sludge digester and sludge holding tank (and currently unused sand filter drying beds)
• Disposal via four high -rate infiltration basins located off site
According to the monitoring reports, the plant has been treating an average of approximately 350,000gpd for the months of
January and February 2022, the permitted flow is 600,000gpd. Only one oxidation ditch was in operation at the time of
inspection and is handling all the current flows appropriately. The Operation and Maintenance logs, sampling data and
records are very well organized.
Two NOVs were issued in March and April 2021 for fecal and TSS which occurred during an upset event, otherwise
monitoring records generally show consistent compliance with permit limits.
The freeboard in the 5-day upset pond was compliant at the time of inspection, but the level was fairly high due to another
upset event which appears to be under control at this time. These springtime upset events could possibly be somewhat
correlated with seasonal temperature swings.
The facility is deemed compliant with the non -discharge permit WQ0023261.
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DocuSign Envelope ID: A6D58F3E-2F48-4B54-B254-51D53B24F357
Permit: WQ0023261 Owner - Facility: Onslow Water and Sewer Authority
Inspection Date: 04/28/2022 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
Tvpe
Reuse (Quality)
Lagoon Spray, LR
Single Family Spray, LR
Activated Sludge Spray, LR
Activated Sludge Spray, HR
Activated Sludge Drip, LR
Recycle/Reuse
Single Family Drip
Infiltration System
Treatment
Are Treatment facilities consistent with those outlined in the current permit?
Do all treatment units appear to be operational? (if no, note below.)
Comment:
Treatment Flow Measurement -Influent
Is flowmeter calibrated annually?
Is flowmeter operating properly?
Does flowmeter monitor continuously?
Does flowmeter record flow?
Does flowmeter appear to monitor accurately?
Comment: The flowmeter was calibrated on October 27, 2021 by Carolina Technical Services.
Treatment Flow Measurement -Water Use Records
Is water use metered?
Are the daily average values properly calculated?
Comment:
Treatment 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: The flowmeter was calibrated on October 27, 2021 by Carolina Technical Services.
Standby Power
Is automatically activated standby power available?
Yes No NA NE
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Yes No NA NE
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Yes No NA NE
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Yes No NA NE
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Yes No NA NE
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Yes No NA NE
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DocuSign Envelope ID: A6D58F3E-2F48-4B54-B254-51D53B24F357
Permit: WQ0023261 Owner - Facility: Onslow Water and Sewer Authority
Inspection Date: 04/28/2022 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
Is generator tested weekly by interrupting primary power source?
Is generator operable?
Does generator have adequate fuel?
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Comment: The generator is tested under load every Monday and runs for approximately 1 hour each test.
Results are recorded in the maintenance log, along with generator fuel capacity. The
generator was tested and run during the inspection.
Treatment Barscreen
Is it free of excessive debris?
Is disposal of screenings in compliance?
Are the bars spaced properly?
Is the unit in good condition?
Yes No NA NE
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Comment: This process involves mechanical screen with a screw conveyor and a vortex grit chamber.
There is a bypass channel with a manual barscreen available in times of need.
Treatment Activated Sludge
Is the aeration mechanism operable?
Is the aeration basin thoroughly mixed?
Is the aeration equipment easily accessed?
Is Dissolved Oxygen adequate?
Are Settleometer results acceptable?
Is activated sludge an acceptable color?
Yes No NA NE
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Comment: This process involves the use of variable frequency drives to control the rotor brushes and DO
levels inside of the two 300,000 gallon oxidation ditches, with a sluice gate connecting the two.
Oxidation ditch #1 is only used in peak -flow events.
Treatment Clarifiers
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:
Treatment Return pumps
Are they in place?
Are they operational?
Comment:
Treatment Filters
Is the filter media present?
Yes No NA NE
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Yes No NA NE
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Yes No NA NE
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DocuSign Envelope ID: A6D58F3E-2F48-4B54-B254-51D53B24F357
Permit: WO0023261 Owner - Facility: Onslow Water and Sewer Authority
Inspection Date: 04/28/2022 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
Is the filter media the correct size and type?
Is the air scour operational?
Is the scouring acceptable?
Is the clear well free of excessive solids?
Is the mud well free of excessive solids and filter media?
Does backwashing frequency appear adequate?
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Comment: This process consists of two, dual rotating cloth disk filters with a timed/high-level automatic
backwash. These basins are cleaned using bleach when needed to help control algae growth.
The high water alarm in one of these units was tested during the inspection.
Treatment Sludge Storage/Treatment
Is the aeration operational?
Is the aeration pattern even?
If required, are Sanitary "Ts" present in tankage?
Comment:
Treatment Disinfection
Is the system working?
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:
Record Keeping
Is a copy of current permit available?
Are monitoring reports present: NDMR?
Yes No NA NE
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Yes No NA NE
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Yes No NA NE
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Page5of7

DocuSign Envelope ID: A6D58F3E-2F48-4B54-B254-51D53B24F357
Permit: WQ0023261 Owner - Facility: Onslow Water and Sewer Authority
Inspection Date: 04/28/2022 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
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?
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:
End Use -Infiltration
# Is the application High Rate or Low Rate?
Are buffers maintained?
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?
Are GW monitoring wells located properly w/ respect to RB and CB?
Are GW monitoring wells properly constructed, including screened interval?
Is a usable green area maintained?
Is the disposal site acceptable?
Is the distribution equipment acceptable?
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Yes No NA NE
High Rate
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DocuSign Envelope ID: A6D58F3E-2F48-4B54-B254-51D53B24F357
Permit: WO0023261 Owner - Facility: Onslow Water and Sewer Authority
Inspection Date: 04/28/2022 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
Is the disposal site free of ponding? • ❑ ❑ ❑
Is the disposal site free of breakout? • ❑ ❑ ❑
Are the disposal sites free of solids, algae, etc.? • ❑ ❑ ❑
Do the records show that the fields are properly maintained? • ❑ ❑ ❑
Are the disposal sites free of vegetation? • ❑ ❑ ❑
Do any surface water features appear to be adversely impacted by GW discharge? ❑ • ❑ ❑
No chemicals or rototiller used to eliminate vegetation, solids, algae, etc.? • ❑ ❑ ❑
Comment: There have been inconsistent minor groundwater exceedance of pH and Nitrate. The WWTF
is not designed to denitrify. Infiltration ponds, berms, mowing, monitoring wells and general
housekeeping were in great condition.
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