NC0024201_Annual Performance_20230201

Roanoke Rapids Sanitary District
P.O. Box 308
1000 Jackson Street
Roanoke Rapids, NC 27870
[phone]
Fax: [phone]
www.rrsd.org
February 1, 2023 CERTIFIED MAIL 7005 3110 0001 6339 1404
RETURN RECEIPT REQUESTED
Mr. Scott Vinson, Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ
1628 Mail Service Center
Raleigh, N. C. 27699-1628
Re: 2022 System Performance Annual Report
Collection System #WQC00027
NPDES #NC0024201
NCG110000
Dear Mr. Vinson:
Enclosed please find three (3) copies of Roanoke Rapids Sanitary District's System
Performance Annual Report for calendar year 2022. This report is submitted to meet the
requirements of the NCDEQ policy to promote public oversight of system performance for
reduction and elimination of sanitary sewer overflows (SSO's) from wastewater collection
or treatment works.
If these documents should be provided to additional DWQ personnel; or if additional
information is required, please do not hesitate to contact us.
Very truly yours,
Roanoke Rapids Sanitary District
R. Danieley Bown, P.E.
Chief Executive Officer
Enclosures
Cc: Steven Ellis
David Scott
File
c^dan brown \opdcs pemul\'22_sys performance awn report kr.docx
Page:
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2022
Annual Performance Report
Roanoke River Waste Treatment Plant NC0024201 &
Collection System WQCS00027
Abstract
The Annual Performance Report provides key performance information that demonstrates the
POTW's accountability to ensure Roanoke Rapids Sanitary District's stewardship and prosperity
by addressing its environmental, operations, and maintenance challenges through
transformative process and technology solutions.
Steven L. Ellis, David Scott
[e-mail] [e-mail]
_. ■ #IMMM__NIII _ ■ P ■ # 1 III1MMMMIMMIMI 111 a ■M■ MIN = H1 ■ l ■■ M ■

I. General Information:
A. Regulated entity: Roanoke Rapids Sanitary District, Collection Systems (C.S.) and Wastewater
Treatment Plant (WWTP), together Publicly Owned Treatment Works (POTW)
B. Responsible entity: Roanoke Rapids Sanitary District, Dan Brown, CEO
PO Box 308
Roanoke Rapids, NC 27870
Phone: [phone]
C. Person in charge/contact
1. C.S.: David Warren Scott, Operator in Responsible Charge (ORC)
Eric Wes Deaton, Back-up ORC
Roanoke Rapids Sanitary District, Distribution & Collection
425 East 11th St.
Roanoke Rapids, NC 27870
Phone: [phone]
2. WWTP: Steven L Ellis, Operator in Responsible Charge (ORC)
Timothy Skipper, Back-up ORC
Roanoke River Wastewater Treatment Plant
135 Aqueduct Road
Weldon, NC 27890
Phone: [phone]
D. Applicable Permit(s)
1. C.S.: North Carolina Environmental Management Commission System -wide Wastewater
Collection System Permit No. WQCS00027
2. WWTP: -
National Pollution Discharge Elimination System (NPDES): NC0024201
Land Application (L.A.): WQ0001989
Stormwater (General): NCG110000
E. Description of C.S.:
The collection system consists of approximately 146 miles of sewer lines and six lift stations that
serve Roanoke Rapids, Gaston, and portions of Halifax and Northampton Counties. All with an
approximate population of 17,600. The sewer lines within Roanoke Rapids, Gaston, and all sub-
divisions, which connect to two main Interceptors, range in size from 8" to 12". There are two
main 30" diameter Interceptors transporting wastewater to the WWTP.
Roanoke Rapids Sanitary District
2022 Annual Performance Report Page 1

The Roanoke River Interceptor collects wastewater from basins located on the north side of the
Sanitary District. The Gaston basin and Northampton County are also served by this interceptor.
The Interceptor begins just west of 100 Gaston Road (NC HWY 48) in Roanoke Rapids. There are
3 primary basin pump stations and 2 secondary pump stations served by the interceptor whose
pipe sizes range from 18" to 30".
The Chockoyotte Creek Interceptor serves the south side of the Sanitary District and three sub-
divisions located outside the Roanoke Rapids city limits: Lake View Park, Greenbriar, and Lincoln
Heights. The Interceptor begins adjacent to 1100 Zoo Road. There is one primary basin pump
station along the route. The interceptor pipe sizes range from 12" to 30".
The system has six sewer lift stations. Three stations are in the Gaston basin. HWY 46 Pump
Station serves a Northampton County School. The Old Emporia Road Pump Station serves the
Chowan Housing Projects, and the Hwy 48 Pump Station pumps all flows from Gaston and
Northampton County via an 8" force main suspended from the NC HWY 48 Bridge spanning the
Roanoke River to the Roanoke River Interceptor. The remaining three pump stations are located
within Roanoke Rapids basins and serve residential and some light commercial customers. Two
of the stations, Belmont and Poplar Springs, discharge to the Roanoke River Interceptor while the
Greenbriar Pump Station discharges to the Chockoyotte Creek Interceptor.
F. Description of WWTP:
The wastewater treatment plant is rated at 8.34 million gallons per day (MGD). Peak flow is rated
at 12.5 MGD.
Treatment processes at the wastewater plant include grit and rag removal. This is followed by
primary clarification, trickling filter BOD buffering, biological secondary treatment, activated
solids treatment, secondary clarification, final effluent chlorination/de-chlorination processes,
and final pH adjustment.
During these processes, solids are removed from two locations. Primary clarification removes
settleable solids from incoming wastewater to an anaerobic digestion unit. Here, the solids in
the absence of oxygen, receive pH adjustment, mixing, and heating to produce a stabilized
material suitable for land application. Once the solids are stable, excess water is decanted and
returned to the plant for further treatment. The stabilized, thickened solids are treated with lime
for odor control and then removed to a holding tank prior to transportation for land application.
Secondary clarification removes solids from the activated solids process. Here, solids in the
presence of oxygen and mixing accumulate in excess. They are removed, chemically stabilized,
and added to a holding facility. All stabilized solids are analyzed, and land applied according to
their nutrient value, ceiling limit (mg/kg) and cumulative requirements.
Roanoke Rapids Sanitary District
2022 Annual Performance Report Page 2

There are two pumping stations distributing wastewater into and through the plant. They are
the Influent Pump Station, which includes an equalization pump, and the Trickling Filter Effluent
Pump Station. The Influent Pump Station has the capacity to pump 20 MGD, the equalization
pump, 6 MGD, and the Trickling Filter Effluent Pump Station, 27 MGD. Standing by in conjunction
with these pump stations is the Emergency Flood Pump Station with a capacity of 21 MGD to
remove treated effluent from the plant during high river stages which prevent normal gravity
flow discharge. Also, a storm water pump station has been installed. This station intercepts site
runoff, an unnecessary treatment load and potential site flooding condition, and removes it
before entry to the plant. It has the capacity to pump 11.5 MGD. Numerous other pumps and
mixers are located throughout the plant to facilitate process control.
II. Performance:
1. C.S:
The performance of the system in 2022 was particularly good. There were no permit violations or
monitoring and reporting violations. The District's Fat, Oil, and Grease (FOG) Program
performed 23 inspections of area restaurants and food preparation facilities (FPE). Full facility
inspections are now handled by the Northampton and Halifax County Health Departments. The
District continues outside visual inspections for exterior traps, and interior inspections for
potential problem areas as well as interior separators. There were no notices of violation. All
FPFs were advised to continue following "Best Management Practices" and maintain
maintenance records. The District FOG program is continuing our public education program.
There were no Sanitary Sewer Overflows (SSO) out of the five total SSOs during the period
attributed to FOG in 2022.
The District contracted with USDA wildlife services for outfall cutting, stream debris removal and
beaver management from Chockoyotte Creek located adjacent to its interceptor. This ongoing
work improved access to the interceptor and helped minimize flooding of manholes along the
easement.
2. WWTP:
Over the course of 2022, the Roanoke River Wastewater Treatment Plant operated very
efficiently. There was one monitoring or reporting violation. The plant flows ranged from a daily
maximum of 9.30 MGD to a minimum of 1.70 MGD. The average daily flow was 2.78 MGD. The
plant treated 1,015,400,000 gallons of wastewater throughout the year, which was discharged
to the Roanoke River.
Throughout 2022, there was 172,937 gallons of wastewater that was equalized due to
maintenance and later returned to the plant for treatment.
The efforts to repair the collection system and reduce Inflow and Infiltration from prior years
continued in 2022. This work has led to lower peak flows for shorter peak durations and reduced
the number of bypasses from the plant as illustrated in the following table:
Roanoke Rapids Sanitary District
2022 Annual Performance Report Page 3

Year
2018
2019
2020
2021
2022
Max Day (MGD)
9.0
11.4
12.4
12.68
9.30
Avg. Daily Flow - MGD
3.34
3.24
3.58
3.39
2.78
Estimated I & I - MGD
1.54
1.48
1.86
1.6
1.12
Annual Rainfall - in.
60.5
46
66.3
44.10
47.4
The following table illustrates the treatment performance of the wastewater plant and its ability
to meet and comply with the NPDES permit requirements:
PARAMETER
MONTHLY
LIMIT
WEEKLY
LIMIT
REQUIRED
REMOVAL
ANNUAL
REMOVAL
ANNUAL
AVERAGE
DAILY
MAX
DAILY
MIN
CBOD
25mg/L
37.5mg/L
85%
96.4%
8.5mg/L
22.0mg/L
3.9mg/L
TSS
30mg/L
45mg/L
85%
90.9
18.7mg/L
44.4mg/L
7.7mg/L
Fecal
Coliform
200
Colonies
400
Colonies
N/A
N/A
43.7
Colonies
>436
Colonies
1
Colony
NH3-N
N/A
N/A
N/A
N/A
<1.8mg/L
10.2mg/L
<0.5mg/L
Total-N
N/A
N/A
N/A
N/A
21.1mg/L
24.8mg/L
17.4mg/L
Total-P
N/A
N/A
N/A
N/A
1.0mg/L
2.2mg/L
0.4mg/L
During 2022, the District continued its contract with Granville Farms, Inc. for the management of
biosolids. A total of 1,535.15 applicable acres is permitted in the Land Application Program. There
were 2,974,513 gallons, or 662.68 dry tons of biosolids applied to 334.19 Acres. There were no
permit violations for the land application program in 2022.
One of the main treatment units at the wastewater plant is the activated sludge basins. This is
where much of the biological treatment occurs. It is also one of the largest energy consumers at
the plant due to the large centrifugal blowers needed to supply air to the process. In 2021, the
District contracted with RK&K Engineering to do design work on a new blower system to provide
the air needed to the basins in a more efficient manner. The design phase has continued in 2022
and plans should be ready for bidding in fiscal year 2023-24.
Another crucial element to the Wastewater Treatment Plant is the preliminary station and its
screening and grit removal equipment. During 2022, the Rotamat screen was rebuilt to provide
more reliable service. The grit classifier was also rebuilt to ensure it will continue to operate for
years to come.
A. Permit limit violation
1. C.S.: None
2. WWTP: None
Roanoke Rapids Sanitary District
2022 Annual Performance Report Page 4

B. Monitoring and Reporting Violations
1. C.S.. None
2. WWTP: There was one Notice of Violation in August of 2022 for a monitoring and reporting
violation of effluent ammonia nitrogen. The permit requires twice per week monitoring of
ammonia. During the first week of August, there were several staff members out with
Covid-19 and on vacation, leaving the laboratory short staffed. Only one sample was
collected and analyzed that week. No other violations have occurred since. There were no
penalties assessed due to this violation.
C. 2022 Sanitary Sewer Overflows
1. C.S.: There were 5 reportable SSO's in 2022.
1. Manhole PC-186 at 420 Tabb Dr in Gaston NC on 1/3/2022 900 Gal.
2. Manhole K-221 at Charles Cir in Roanoke Rapids on 1/26/2022 300 Gal.
3. Manhole A-54 on 3/24/2022 12,600 Gal.
4. Manhole PI-6 in Gaston at end of Baird St on 8/10/2022 7500 Gal.
5. Manhole K-419 at Smith Church Rd on 12/6/2022 750 Gal.
There was an estimated total of 22,050 gallons spilled in SSO's in 2022. Four spills are the result
of blockage due to debris in the line and one spill was from capacity exceedance due to wet
weather conditions. This correlates to 3.42 SSOs per 100 miles of pipe.
2. WWTP: N/A
D. Bypass of Treatment Facility
1. C.S.: N/A
2. WWTP: There were no bypasses at the Wastewater Treatment Plant in 2022.
E. Description of any known environmental impact or violations.
1. C.S.: None
2. WWTP: None
F. Description of corrective measures taken to address violations or deficiencies.
1. C.S.: Along with the wildlife control, FOG program and outfall clearing discussed above, RRSD
continues to perform preventative sewer backup maintenance by cleaning with Jetter and
Root Cutter; which is attached to the fetter hose, followed by Closed Circuit TV (CCTV) camera
to inspect the lines after cleaning. The District also uses its Vac -con Truck, which cleans the
Roanoke Rapids Sanitary District
2022 Annual Performance Report Page 5

line more effectively and proves to be more reliable than the old unit. The District also
continues to use the Rausch CCTV van purchased in 2018 extensively.
District employees completed two Sanitary Sewer Point Repairs in 2022. The locations were
Melody Ln at MH 1-257 and 713 Raleigh Dr.
District employees completed 31 total new replacement taps in 2022. All 25 were 4" service
lateral replacement taps throughout the district service area.
District employees cleaned 26.51 miles of sewer lines and CCTV'd all suspected problem
areas.
District employees utilized the District's excavator mounted flail mower in conjunction with
NC Wildlife Solutions LLC to cut and clear 20 miles of interceptor rights -of -way and cross-
country lines in 2022.
The District contracted with Tri-State Utilities to clean and CCTV 11,982 feet of 30" PVC
wastewater pipe. The 30" pipe is part of the Chockoyotte Outfall System.
2. Construction has not started on the replacement of a segment of 8" main which crosses
Chockoyotte Creek in the vicinity of Smith Church Road between Manholes K419 and K417.
The segment is known to be a significant source of inflow and SSOs due to the deteriorated
condition of the pipe. The District has permitted plans for the purpose of making known
corrective actions for the problematic segment of sanitary sewer line (MHK419 — MHK417 SS
Rehab). Line deficiencies involve excess inflow in the portion crossing Chockoyotte Creek, and
misalignment caused during Smith Church Road widening that contributed to hydraulic flow
problems. Quotes are currently being taken for proposals to perform the WORK, but our RFP
has not been satisfactorily responded to.
Priority projects continue to prevent RRSD from performing desired improvements and
rehabilitation work in Collection System Sub -Basin 'K'. Sanitary Sewer Evaluation Survey
(SSES) was completed in 2020 to assist RRSD in identifying areas within the sub -basin where
inflow & infiltration (1/1) is occurring. Sub -Basin 'K' contains mostly 8" and 10" gravity
collection lines with a 30" main interceptor (Chockoyotte Creek Outfall) that serves the basin.
The sub -basin contains approximately 435 manholes, and approximately 100,000 feet of
gravity pipe.
The District completed the Wastewater Sub -Basin 'A' and Roanoke River Outfall Study
conducted by Freese and Nichols, Inc. in the first quarter of 2022. The study includes a
desktop analysis of the existing system, development of existing sanitary sewer flows, review
of previous study information, and hydraulic modeling to evaluate capacity in these areas.
The RRSD requested funding assistance from the NC Department of Environmental Quality,
Division of Water Infrastructure in the Spring 2022 Application for Funding to address severe
Inflow & Infiltration (I&I) issues in one of its primary drainage basins in its Wastewater
collection system located in Roanoke Rapids. The purpose of this project is to eliminate a
Roanoke Rapids Sanitary District
2022 Annual Performance Report Page 6

chronic I&I condition by transferring wet weather flows utilizing the existing duplex Belmont
Pump Station. The project will specify reconfiguring its 200 GPM wastewater pumps with 600
GPM flood transfer pumps. Additionally, the project will construct 4,700 LF of 8-in. ductile
iron force main that will divert the combined stormwater and wastewater, influent to the
Belmont Pump Station, from the sub -basin collection system to an existing parallel 12" and
18" interceptor within the sub -basin that is of sufficient capacity to transport the combined
sewer directly to the Roanoke River Outfall for treatment at the Roanoke River Wastewater
Treatment Plant. The Belmont Pump Station is located on Laurel Street in Roanoke Rapids
and the 8-inch ductile iron force main will be constructed on Laurel Street, W. 4th Street and
connect with an existing manhole and 12" gravity sewer that extends along Taylor Street to
W. 2' Street, at which point, the interceptor merges with parallel sewer interceptors. The
requested funding assistance has not been awarded.
In April 2022 RRSD entered an agreement with Freese and Nichols, Inc. to assist RRSD by
providing evaluation and develop a Preliminary Engineering Report (PER) for the rerouting of
the existing force main and the associated Belmont Pump Station improvements. The PER is
expected to be completed early in 2023.
3. WWTP: All repairs to minimize Inflow & Infiltration are being made to correct known system
deficiencies. There has been continued staff training in regard to compliance monitoring and
sampling requirements.
III. Notification:
This System Annual Performance Report will be noted on the monthly bill and available to
customers via the Roanoke Rapids Sanitary District's Webpage at www.rrsd.org .
IV. Certification:
I certify, under penalty, that this document is complete and accurate to the best of my
knowledge. I further certify that this report has been made available to the users of the named
system and those users have been notified of its availability.
R. Danieley Brown, E
Chief Executive Officer
ayaVetitt 1, 7o13
Date
Roanoke Rapids Sanitary District
2022 Annual Performance Report Page 7