WQ0005426_Compliance Evaluation Inspection_20240923

September 23, 2024
Jody Reavis – Chief of Maintenance
North Carolina Department of Natural and Cultural Resources
13304 Creedmoor Road
Wake Forest, NC 27587-8505

Subject: Compliance Evaluation Inspection
Falls Lake SRA – Holly Point WWTF
Wastewater Irrigation System
Permit Number: WQ0005426
Wake County

Jody Reavis,
On September 11, 2024, Chris Smith of the Raleigh Regional Office conducted a compliance evaluation
inspection of the wastewater irrigation system located at the Falls Lake Holly Point WWTF.

This facility is permitted for the operation of a 6,295 gallon per day (GPD) wastewater collection,
treatment, and irrigation facility that includes a wastewater collection system consisting of
approximately 4,050 linear feet (LF) of 8-inch gravity sewer line, a pump station with two 62.5 gallon per
minute (GPM) pumps and a high-water alarm, approximately 3,000 LF of 3-inch force main, 550 LF of 6-
inch force main, a pump station with two 74 GPM pumps and a high-water alarm, approximately 3,680
LF of 4-inch force main, approximately 550 LF of 6-inch force main, a pump station with two 63 GPM
pumps and a high-water alarm, approximately 380 LF of 3-inch force main with a 210 GPM inline
booster pump station with dual pumps and a high-water alarm, approximately 6,200 LF of 6-inch force
main, and the continued operation of a wastewater treatment and irrigation system consisting of a 138
foot (ft) by 123 ft by 7 ft lined stabilization lagoon with a 2 horsepower (hp) surface aerator, a 123.5 ft
by 107.5 ft by 7 ft lined storage lagoon, a 12,000 gallon chlorine contact chamber, an
instantaneous/totalizing inline flow meter, two 182 gallon per minute (GPM) irrigation pumps,
approximately 510 LF of 6-inch force main, approximately 220 LF of 4-inch effluent force main,
approximately 200 LF of 3-inch effluent force main, a 2.8 acre spray irrigation area, 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 of David Mumford, Stephen Donaldson, and Joel Valentine was helpful and appreciated.

Docusign Envelope ID: 06694187-3C97-4FC3-9A2D-E94FCDAB27B7
WQ0005426
Wake
September 23, 2024
Page 2 of 3

North Carolina Department of Environmental Quality | Division of Water Resources | Raleigh Regional Office
3800 Barrett Drive | 1628 Mail Service Center | Raleigh, North Carolina 27699-1628
919.791.4200

This compliance evaluation inspection consisted of the following:
•Review of the permit
•Review of the owner/facility information
• Review of Non-Discharge Monitoring Reports (NDMR), Non-Discharge Application Reports
(NDAR-1), Groundwater Monitoring Reports (GW-59A), ORC logbooks, and calibration
documentation
•On-site inspection of treatment components and spray fields

The current permit was issued June 16, 2020 and expires on November 30, 2026.

The four (4) pump “sub” stations and the main pump station appeared to be well maintained. The
audible and visual alarms functioned properly when using the test switches and pulling the floats.
Proper signage was installed at each pump station location. The concrete and steel in the pump stations
has degraded over the years of service. There is a plan to rebuild all the lift stations at Holly Point,
Rollingview, and Sandling Beach SRAs.

The treatment facility is surrounded by a fence and a locked gate. The facultative and storage lagoons
had plenty of freeboard and were compliant with permit conditions at the time of the inspection. The
lagoons are concrete lined. The berms and vegetation were in good condition. The aerator is in working
order but has been turned off while awaiting delivery of a power supply component. The concrete
chlorine contact chamber was in good condition. A homemade chlorinator using a garden hose running
water into a perforated container of chlorine tablets during irrigation events has been working well to
produce a 1 or 2 ppm chlorine residual. The in-line totalizer flow meter was last calibrated on May 16,
2024.

One (1) zone of the spray field was irrigated during the inspection. A few heads were partially clogged.
The ORC reports that heads are often clogged with duckweed that grows in the lagoons and chlorine
contact chamber and that they are cleared frequently. Spray field soil sampling was last conducted on
December 29, 2023.

Monitoring reports are submitted complete and on time. Facility records were in good order at the time
of the inspection.

Overall, the facility appears to be extremely well maintained and operated in compliance with permit
conditions.

Docusign Envelope ID: 06694187-3C97-4FC3-9A2D-E94FCDAB27B7
WQ0005426
Wake
September 23, 2024
Page 3 of 3

North Carolina Department of Environmental Quality | Division of Water Resources | Raleigh Regional Office
3800 Barrett Drive | 1628 Mail Service Center | Raleigh, North Carolina 27699-1628
919.791.4200

If you have any questions about this inspection or this letter, please contact Chris Smith at
[e-mail] or 919-791-4257.

Sincerely,

Michael Hall, Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ

Attachments: Compliance Inspection Report
cc: Laserfiche

Docusign Envelope ID: 06694187-3C97-4FC3-9A2D-E94FCDAB27B7