WQ0014046_Site Visit_20180420

ROY COOPER
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MICHAEL S. REGAN
Secretary
Water Resources LINDA CULPEPPER
Environmental Quality Interim Director
April 20, 2018 RECEIVED/DENR/DWp
The Honorable Janet C Parrott APR 2 5 2018
Town of Stovall Water Resources
Post Office Box 100 Permitting Section
Stovall,North Carolina 27582
Subject: Permit No.WQ0014046
Stovall WWTP
Wastewater Irrigation System
Granville County
Dear Mayor Parrott,
Staff of the NC Division of Water Resources (DWR), Water Quality Regional Operations
Section(QWROS), Raleigh Regional Office (RRO)inspected the Town of Stovall Wastewater
Irrigation System Permit No. WQ0014046 on April 18, 2018. We wish to thank Wayne Keeton
who assisted during the inspection. The purpose of this inspection was to verify permit
compliance.
The current permit was issued July 24, 2015 and expires December 31, 2020.
Wayne Keeton is designated as Operator in Responsible Charge(ORC) and Dale Mathews is
designated as Back-up ORC. The ORC keeps accurate records and is familiar with information
in his files. Records indicate that the flow meters were calibrated in 2017. Soil analyses were
performed December 2017 and do not indicate any issues. The ORC stated that no residuals have
been removed from the lagoons to date. The lagoon receives only septic tank effluent, so solids
are not likely to build up in the lagoon. Groundwater monitoring is performed in March, July
and November per the permit conditions.
Operational records reflect all operations and maintenance activities. All monitoring data and
field loading records indicate compliance with permit limits (69,000 gpd influent and 28.3 inches
annual hydraulic loading). The facility averages about 19000 gpd and irrigates about 3-8"to the
fields per year. Monitoring wells appear to be well maintained and locked per permit
requirements. All wells are properly monitored and none indicate groundwater 2L limit issues.
The location of the lagoons and fields are secured with fencing,properly signed identifying
"Stovall WWTP" and locked gate at entrance.
The treatment and storage lagoons were well maintained and freeboard was at 5.3 feet in the
final storage lagoon which is compliant with the required "at least 2 feet". The level gauge is a
float attached at the irrigation pump well with marked measurement interval that accurately
indicate freeboard of storage lagoon. The primary lagoon level is controlled via valves to
overflow pipes set at three different levels to allow management of steady level in this lagoon at
desired level as valves are managed. The current primary lagoon freeboard was at about 3 feet.
'"Nothing Con p res ..-
State of North Carolina I Environmental Quality
1611 Mail Service Center I Raleigh,North Carolina 27699-1611
919-707-9000

t .
The lagoon liners were in excellent condition. The ORC discussed his efforts to keep grass
coverage on the lagoon banks. This is difficult due to seasonal duck and goose population.
There were two small areas with sparse grass on dam between lagoons, but these did not show
indication of erosion. The berm is mowed about twice a year.
The irrigation fields were observed and all areas appear to be in excellent condition. The pump
system was activated and field 7 was sprayed. A vacuum operated automatic pump primer and a
manually operated pressure regulator prevents the sprayfield pumps from cavitating. All
sprayheads appear to work and rotate properly. The ORC replaces sprayheads frequently due to
damage by birds, freezing or degradation. A self cleaning spin filter in the wet well prevents
solids from entering the irrigation system, so sprayheads rarely clog.
The chlorinator system adding sodium hypochlorite at irrigation pump appears well maintained.
Reported residual chlorine on the NDMR reports submitted indicate adequate disinfection for the
wastewater as applied. No areas of ponding,runoff or leakage were observed. The ORC
indicated that he normally irrigates one of the 8 zones each day irrigation is performed and he
rotates through all zones equally. The grass crop appears well managed. Soils appear to be in
good condition.
Each home owner has a septic tank and pump which discharge into forced main collections
system. All wastewater discharges into the primary facultative lagoon which overflows at a set
level to the storage lagoon for irrigation as needed. The Town of Stovall pumps each septic tank
as needed and maintains their pumps as a service to residents.
The lagoons and spray system were operational at the time of the inspection and the components
of the system are as listed in the permit and are being well maintained. There have been no
violations noted for this site since last inspection in May 2016.
The Wastewater Surface Irrigation System appears to be in compliance with the conditions of
Permit Number WQ0014046.
Please see the attached Inspection Report.
p P
If you have any questions regarding this letter, please contact me at [phone] or via e-mail
at [e-mail].
Sincerely,
Ray Milosh
Environmental Specialist
Division of Water Resources, Water Quality
Regional Operations Section, Raleigh •
Regional Office

Attachment: Compliance Inspection Report
cc: RRO-WQROS Files
DWR Central Files

Compliance Inspection Report
Permit: WO0014046 Effective: 01/01/16 Expiration: 12/31/20 Owner: Town of Stovall
SOC: Effective: Expiration: Facility: Stovall WWTF
County: Granville 7155 Hwy 15 S
Region: Raleigh
Oxford NC 27565
Contact Person: Janet C Parrott Title: Mayor Phone: [phone]
Directions to Facility:
From Oxford,take Hwy 15 North. —4 miles North of 158 Bypass,turn left on Hillairy Drive. Treatment plant is at the end of the road.
System Classifications: SI,
Primary ORC: Wayne T Keeton Certification: 988506 Phone: [phone]
Secondary ORC(s):
On-Site Representative(s):
Related Permits:
Inspection Date: 04/18/2018 Entry Time: 11:00AM Exit Time: 01:OOPM
Primary Inspector: Raymond M Milosh Phone: [phone]
Secondary Inspector(s):
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: Wastewater Irrigation
Facility Status: • Compliant 0 Not Compliant
Question Areas:
• Treatment Flow Measurement-Effluent • Treatment Flow Measurement-Influent • Miscellaneous Questions
Treatment Flow Measurement-Water 111 Record Keeping ■ Treatment Lagoons
Use Records
▪ End Use-Irrigation Treatment Disinfection $ Treatment Flow Measurement
IN Wells
(See attachment summary)
•
Page: 1

•
Permit: W00014046 Owner-Facility:Town of Stovall
Inspection Date: 04/18/2018 Inspection Type:Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Staff of the NC Division of Water Resources(DWR), Water Quality Regional Operations Section (QWROS). Raleigh
Regional Office(RRO)inspected the Town of Stovall Wastewater Irrigation System Permit No.WQ0014046 on April 18,
2018. We wish to thank Wayne Keeton who assisted during the inspection. The purpose of this inspection was to verify
permit compliance.
The current permit was issued July 24,2015 and expires December 31, 2020.
Wayne Keeton is designated as Operator in Responsible Charge(ORC) and Dale Mathews is designated as Back-up ORC.
The ORC keeps accurate records and is familiar with information in his files. Records indicate that the flow meters were
calibrated in 2017.Soil analyses were performed December 2017 and do not indicate any issues. The ORC stated that no
residuals have been removed from the lagoons to date. The lagoon receives only septic tank effluent, so solids are not likely
to build up in the lagoon. Groundwater monitoring is performed in March, July and November per the permit conditions.
Operational records reflect all operations and maintenance activities.All monitoring data and field loading records indicate
compliance with permit limits(69,000 gpd influent and 28.3 inches annual hydraulic loading).The facility averages about
19000 gpd and irrigates about 3-8"to the fields per year. Monitoring wells appear to be well maintained and locked per
permit requirements. All wells are properly monitored and none indicate groundwater 2L limit issues. The location of the
lagoons and fields are secured with fencing, properly signed identifying"Stovall WWTP"and locked gate at entrance.
The treatment and storage lagoons were well maintained and freeboard was at 5.3 feet in the final storage lagoon which is
compliant with the required"at least 2 feet".The level gauge is a float attached at the irrigation pump well with marked
measurement interval that accurately indicate freeboard of storage lagoon,The primary lagoon level is controlled via valves to
overflow pipes set at three different levels to allow management of steady level in this lagoon at desired level as valves are
managed.The current primary lagoon freeboard was at about 3 feet.The lagoon liners were in excellent condition.The ORC
discussed his efforts to keep grass coverage on the lagoon banks. This is difficult due to seasonal duck and goose
population. There were two small areas with sparse grass on dam between lagoons, but these did not show indication of
erosion. The berm is mowed about twice a year.
The irrigation fields were observed and all areas appear to be in excellent condition. The pump system was activated and
field 7 was sprayed. A vacuum operated automatic pump primer and a manually operated pressure regulator prevents the
sprayfield pumps from cavitating. All sprayheads appear to work and rotate properly. The ORC replaces sprayheads
frequently due to damage by birds,freezing or degradation. A self cleaning spin filter in the wet well prevents solids from
entering the irrigation system, so sprayheads rarely clog.
The chlorinator system adding sodium hypochlorite at irrigation pump appears well maintained. Reported residual chlorine
on the NDMR reports submitted indicate adequate disinfection for the wastewater as applied. No areas of ponding, runoff or
leakage were observed. The ORC indicated that he normally irrigates one of the 8 zones each day irrigation is performed
and he rotates through all zones equally.The grass crop appears well managed. Soils appear to be in good condition.
Each home owner has a septic tank and pump which discharge into forced main collections system. All wastewater
discharges into the primary facultative lagoon which overflows at a set level to the storage lagoon for irrigation as needed.
The Town of Stovall pumps each septic tank as needed and maintains their pumps as a service to residents.
The lagoons and spray system were operational at the time of the inspection and the components of the system are as
listed in the permit and are being well maintained.There have been no violations noted for this site since last inspection in
May 2016.
The Wastewater Surface Irrigation System appears to be in compliance with the conditions of Permit Number WQ0014046.
Page: 2

Permit: WO0014046 Owner-Facility:Town of Stovall
Inspection Date: 04/18/2018 Inspection Type:Compliance Evaluation Reason for Visit: Routine
Type Yes No NA NE
Reuse(Quality) ❑
Infiltration System El
Single Family Spray,LR • ❑
Activated Sludge Spray, LR ❑
Activated Sludge Spray,HR 0
Activated Sludge Drip,LR 0
Recycle/Reuse ❑
Single Family Drip ❑
Lagoon Spray,LR •
Treatment Flow Measurement-Influent Yes No NA NE
Is flowmeter calibrated annually? • ❑ El El
Is flowmeter operating properly? • 0 0 El
Does flowmeter monitor continuously? • ❑ El ❑
Does flowmeter record flow? e ❑ ❑ ❑
Does flowmeter appear to monitor accurately? • 0 ❑ ❑
Comment:
Treatment Flow Measurement-Water Use Records Yes No NA NE
Is water use metered? • ❑ ❑ p
Are the daily average values properly calculated? ■ ❑ ❑ ❑
Comment:
Treatment Flow Measurement-Effluent Yes No NA NE
Is flowmeter calibrated annually? ® ❑ ❑ ❑
Is flowmeter operating properly? ■ ❑ ❑ ❑
Does flowmeter monitor continuously? ® El El El
Does flowmeter record flow? ® ❑ El El
Does flowmeter appear to monitor accurately? ® ❑ ❑ ❑
Comment:
Treatment Disinfection
Yes No NA NE
Is the system working? ® ❑ ❑ ❑
Do the fecal coliform results indicate proper disinfection? ® ❑ ❑ ❑
Is there adequate detention time(>=30 minutes)? ❑ ❑ ❑ II
Is the system properly maintained? ® ❑ ❑ ❑
If gas,does the cylinder storage appear safe? ❑ ❑ • ❑
Page: 3

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Permit: W00014046 Owner-Facility:Town of Stovall
Inspection Date: 04/18/2018 Inspection Type:Compliance Evaluation Reason for Visit: Routine
Has permittee been free of public complaints in last 12 months? • 0 ❑ ❑
Is a copy of the SOC readily available? ❑ ❑ R ❑
No treatment units bypassed since last inspection? • ❑ ❑ ❑
Comment:
End Use-Irrigation Yes No NA NE
Are buffers adequate? • 0 ❑ 0
Is the cover crop type specified in permit? • 0 ❑ ❑
Is the crop cover acceptable? • ❑ ❑ ❑
Is the site condition adequate? . ❑ ❑ ❑
Is the site free of runoff!ponding? • ❑ ❑ ❑
Is the acreage specified in the permit being utilized? • ❑ 0 ❑
Is the application equipment present? • ❑ ❑ 0
Is the application equipment operational? • ❑ ❑ ❑
Is the disposal field free of limiting slopes? • El ❑ ❑
Is'access restricted and/or signs posted during active site use? • ❑ ❑ ❑
Are any supply wells within the CB? 0 ❑ • ❑
Are any supply wells within 250' of the CB? ❑ 0 • ❑
How close is the closest water supply well? ❑ ❑ • ❑
Is municipal water available in the area? ❑ ❑ • ❑
#Info only: Does the permit call for monitoring wells? ■ ❑ ❑ ❑
Are GW monitoring wells located properly w/respect to RB and CB? • ❑ ❑ ❑
Are GW monitoring wells properly constructed,including screened interval? ® ❑ ❑ 0
Are monitoring wells damaged? ❑ ❑ MI ❑
Comment:
Page: 5