WQCS00027_Annual Report_20200227

09E P.O. Box 308
1000 Jackson Street
C �a Roanoke Rapids, NC 27870
Roanoke Rapids Sanitary District [phone]
Fax: [phone]
�fT4RV pt 4` www.rrsd.ore
February 27, 2020 CERTIFIED MAIL 7005 3110 0001 6339 2166
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: 2019 System Performance Annual Report
Collection System #WQC00027
NPDES #NC0024201
NCG 110000
Dear Mr. Vinson:
NC Dept of Environmental Quality
MAR,2p
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Raleigh Regional Office
Enclosed please find three (3) copies of Roanoke Rapids Sanitary District's System
Performance Annual Report for calendar year 2019. 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 contact me.
Very truly yours,
Roanoke Rapids Sanitary District
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R. Danieley Bro , P.E.
Chief Executive Officer
Enclosures
Cc: Steven Ellis
David Scott
File
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`IRY
2019
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]

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): NCO024201
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; which encompasses 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
2019 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 served by the
interceptor whose 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, 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 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. 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 then removed
to a holding tank to await land application.
Roanoke Rapids Sanitary District
2019 Annual Performance Report Page 2

Secondary clarification removes solids from the activated solids process. Here,
solids in the presence of oxygen, pH control, 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 and accumulative requirements.
There are two pumping stations in the wastewater plant distributing wastewater
into and through the plant. They are the Influent Pump Station and the Trickling
Filter Effluent Pump Station. The Influent Pump Station has the capacity to pump
20 MGD and the Trickling Filter Effluent Pump Station 27 MGD. In conjunction
with these two pump stations there 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 for process control.
It, Performance:
1. C.S:
The performance of the system in 2019 was very good. There were no permit violations
or monitoring and reporting violations. The District's Fat, Oil, and Grease (FOG)
Program performed 43 inspections of area restaurants and food preparation
facilities (FSE). There were no notices of violation. All FSE were advised to continue
following "Best Management Practices" and maintain maintenance records. The
District FOG program sent out billing inserts on FOG information throughout the
year continuing our public education program. There were no Sanitary Sewer
Overflows (SSO) out of eight total SSOs during the period attributed to FOG in
2019.
The District contracted with USDA wildlife services for outfall cutting 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.
The District also contracted with Freese and Nichols & Hydro Structures to install
flow meters in five locations around Roanoke Rapids. Hydro Structures also did a
manhole inspections condition assessment on Manhole K-248 in Basin K and pipe
condition assessments throughout Basin K.
Roanoke Rapids Sanitary District
2019 Annual Performance Report Page 3

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Over the course of 2019, the Roanoke River Wastewater Plant operated very
efficiently. There were no permit violations or monitoring and reporting
violations. The plant flows ranged from a daily maximum of 11.4 Million Gallons
per Day(MGD) to a minimum of 1.8 MGD. The average daily flow was 3.2 MGD.
The plant treated 1,317,800,000 gallons of wastewater throughout the year;
which was discharged to the Roanoke River.
During 2019, there was one plant bypass of treatment units in which 35,343
gallons of Wastewater with some biological treatment was bypassed to the
Roanoke River. There were two times during the year when flows were increased
due to heavy rains. During these times, flow was equalized to the equalization
basins to lower peak flows through the plant. Throughout 2019,1,706,811 gallons
of wastewater was equalized 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 2019. This work has led to lower peak flows and reduced the
number of bypasses from the plant as illustrated in the following table:
Year
20,15
2026
2017 2018
2019
Max Day (MGD)
11.4
17.3
8.2
9.0
11.4
Avg. Daily Flow - MGD
3.80
3.62
2.96
3.34
3.24
Estimated 1 & I - MGD
2.05
1.76
1.06
1.54
1.48
Annual Rainfall - in.
47.93
49.99
41.33
60.5
46
The following table illustrates the treatment performance of the wastewater plant
and its ability to meet and exceed the NPDES permit requirements:
FARAMETE t
':MONTHIL.
ILIMlt
WEEKLY
iLIMIt
.OE UTAEU
AEMOVA.
jA UAt
„ REM.&YAI4.
WN-114*
Al ERAG.
bA' ILY
IMA
bAIL17
MIS+!!
CBOD
25mg/L
37.5mg/L
85%
96.2%
8.0mg/L
17.6mg/L
4.0mg/L
TSS
30mg/L
45mg/L
85%
91.2%
16.6mg/L
56mg/L
6.7mg/L
Fecal
Coliform
200
Colonies
400
Colonies
N/A
N/A
32
Colonies
>792
Colonies
1
Colony
NH3-N
N/A
N/A
N/A
N/A
<2.8mg/L
8.4mg/L
<0.5mg/L
Total-N
N/A
N/A
N/A
N/A
<13.6mg/L
18.6mg/L
7.1mg/L
Total-P
N/A
N/A
N/A
N/A
1.03mg /L
1.70mg/L
0.58m /L
The Wastewater Treatment Plant relies on anaerobic digesters for primary sludge
stabilization. In 2019, the original sludge heater for digester number 1 that was
installed in 1965, was replaced with new heater. The new heater is safer and more
efficient. Also in 2019, the parts to update the heater for digester number 3 were
ordered to make both heaters alike. The work on heater number 2 should be
completed in early 2020. Digester number 2 was cleaned out and inspected in
Roanoke Rapids Sanitary District
2019 Annual Performance Report Page 4

2019 along with having the steel floating top removed, blasted, and recoated to
preserve and extend its useful life. Furthermore, a new waste gas burner was
ordered and received that will automatically control the methane gas system
pressure for the digester heaters. This will prevent the wasting of methane gas
and the release of unburned methane gas into the atmosphere. The new burner
will be installed in January of 2020.
There are 1985.46 acres of applicable land currently permitted through the
District's Land Application Permit. During 2019 there were 2,609,393 gallons, or
559.29 dry tons of biosolids applied to 209.53 acres. There were no permit
violations for the land application program in 2019.
A. Permit limit violation
1. C.S.: None
2. WWTP: None
B. Monitoring and Reporting Violations
1. C.S.: None
2. WWTP: None
C. 2019 Sanitary Sewer Overflows
1. C.S.: There were 8 reportable SSO's in 2019.
1. Manhole 138 at 11 & Franklin St., 1,200 Gal.
2. Manhole 112"d & Franklin St., 1,800 Gal.
3. Manhole 52 at 31 & Rapids St., 5,400 Gal.
4. Manhole 46 at V & Starke Dr., 12,600 Gal.
5. Manhole 54 on Land St., 14,400 Gal.
6. Manhole 54 on Land St., 900 Gal.
7. Manhole 46 31 & Starke Dr., 2,100 Gal.
8. Manhole 27 NC Hwy 48 near Rightmeyer Machine Rentals., 900 Gal.
There was an estimated total of 39,300 gallons spilled in SSO's in 2019. These
spills are the result of capacity exceedance due to wet weather conditions. This
correlates to 5.47 spills per 100 miles of pipe down from a 5-year high in 2014 of
15.07 spills per 100 miles of pipe.
2. WWTP: N/A
D. Bypass of Treatment Facility
1. C.S.: N/A
Roanoke Rapids Sanitary District
2019 Annual Performance Report Page 5

2. WWTP: There was one bypass at the Wastewater Treatment Plant in 2019.
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 Jetter 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 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 three Sanitary Sewer Point Repairs in 2019. The
locations were 1304 Roanoke Ave. 1505 Murphey St, and 524 NC Hwy 125.
District employees completed 14 total new replacement taps in 2019. Eleven of
which were 4" replacement taps throughout the district service area.
District employees cleaned 23.30 miles of sewer lines and CCTV'd all suspect
problem areas.
District employees utilized the District's excavator mounted flail mower in
conjunction with NC Wildlife Solutions LLC to cut and clear 16.88 miles of
interceptor right-of-way's and cross-country lines in 2019.
The District contracted with Freese & Nichols and Hydro Structures to install flow
meters and perform condition assessment of District assets. Hydro -Structures
performed a manhole inspection of Manhole K-248 in Basin K and pipe condition
assessments throughout Basin K. The flow meters were used to calculate the
estimated inflow and infiltration during rain events. The locations of the flow
meters are
• Smith Church Rd. Manhole K-192
• Vine St. Manhole K-1
• Virginia Ave. Manhole K-105
• Carolina Ave. Manhole K-142
• West 5th St. & Monroe St. Manhole C-160.
Roanoke Rapids Sanitary District
2019 Annual Performance Report Page 6

t
RRSD entered into Task Authorizotion 3 associated with its Master Agreement
with Freese and Nichols to perform Wastewater Sub -Basin W Sanitary Sewer
Evaluation Survey (SSES) to assist RRSD in identifying areas within the sub -basin
where inflow & infiltration (1/1) is entering the collection system. Sub -Basin 'K'
contains mostly 8" and 10" gravity collection lines with a 30" main interceptor
(Chockoyotte Outfall) that runs through the basin. The sub -basin contains
approximately 435 manholes, and approximately 100,000 feet of gravity pipe.
2. WWTP: All repairs to minimize the Inflow & Infiltration due to heavy rains are
being made to correct known system deficiencies.
Ill. Notification:
This System Annual Performance Report will be available to customers via the
Roanoke Rapids Sanitary District's Webpage at www.rrsd.org.
IV. Certification:
certify, under penalty of law, 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
21 7 W
Date
Roanoke Rapids Sanitary District
2019 Annual Performance Report
Page 7