NC0023906_Annual Report_20180829

WiLSON.
NORTH CAROLINA
August 29,2018
RE
CRIV D ��®
CER 1'll+'LL:D MAIL
RETURN RECEIPT REQUESTED SEP 7 20' R
• Ater 8
System-Performance Annual Report ermi�in9 S ction
NC DEQ
1617 Mail Service Center
Raleigh;North Carolina 27699-1617
Subject: 2018 Wastewater Collection and Treatment System Report
City of Wilson—hominy Creek Water Reclamation Facility
NPDES Permit No.NC0023906
Dear Sir or Madam:
Enclosed are three copies of the City of Wilson's 2018 Wastewater Collection and Treatment
System Report. The reports were mailed to customers during August 2018.
The report is based on fiscal year July 1,2017—June 30,2018. The report is submitted as
required by the N.C. Clean Water Act of 1999.
Please contact me at(252 399=2491 or via email [e-mail] if you need
additional information.
Sincerely, I'
Jimmy Pride
Water Reclamation Manager
cc: Barry Parks,Director of Water Resources
Regional Supervisor,DWR Raleigh Regional Office- Surface Water Protection
CITY OF WILSON
INCORPORATED 1849
WATER RECLAMATION DIVISION I P.O.BOX 10(WILSON,NORTH CAROLINA 27894-0010 1 [phone] 1 [phone]
EQUAL OPPORTUNITY EMPLOYER 1 AFFIRMATIVE ACTION EMPLOYER

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"Some Things Just Belong in the Toilet"
,..---- ,
Toilets are meant for one activity,and you know what we're talking about! When The following is a partial list of items that
the wrong thing is flushed,results can include costly backups on your own prop- should not be flushed:
erty or problems in the City's sewer collection system, and at the wastewater x Baby wipes,diapers
treatment plant.That's why it is so important to treat toilets properly and flush x Cigarette butts
only your personal contributions to the City's wastewater system. x Rags and towels ........_
x Cotton swabs,medicated wipes
(all brands) ''.
"Disposable Does Not Mean Flushable" x Syringes
Flushing paper towels and other garbage down the toilet wastes water and can x Candy and other food wrappers
create sewer backups and SSOs. The related costs associated with these SSOs can x Clothing labels
be passed on to ratepayers. Even if the label reads"flushable,you are still safer x Cleaning sponges NV
and more environmentally correct to place the item in a trash can. x Toys `,.
x Plastic items
x Aquarium gravel or kitty litter
xRubber items such as latex gloves '
"It's a Toilet, . Sanitarynapkins
xHair
/ . ',0 T x Underwear `,
x Disposable toilet brushes ifit
x Tissues(nose tissues,all brands)
'// x Egg shells,nutshells,coffee grounds
a Trash Ca n x Food scraps
x Oil
x Grease
&111,7 Fit
x Medicines

• • 1r vironmen an• ►ra er Iua i y, rou: eamwor an r xce ent ervice, now and for future generations."
This report provides information concerning the City of Wilson's wastewater collection and treatment system performance for July 1,2017 to June 30.2018 as required in the North Carolina Clean Water Act of 1999(House Bill 1160).
HOMINY CREEK WATER Collection System Maintenance and Once at the WRF,the treatmentrocess begins. The
WRF p g Returning the Water to Nature or Reusing the
RECLAMATION FACILITY
(WRF) Projects Completed: treatment plant is designed to treat 14 MGD.The plant Water
I • 57 miles of pipe cleaned(about 16%of the entire 359-mile currently averages treating 8.4 MGD.The following de- Most of this clean water-now called effluent-is
system-10%required) scribes the treatment process: discharged into Contentnea Creek but some of the
4� Wilson • 5,700 feet of pipe replaced Physical Methods Primary Treatment effluent is sent to the City's reclaimed water system
• 94 sewer services replaced
• 130 manholes rehabbed • Bar Screens catch and remove large material (beneficial reuse)to be used for irrigation or industrial
"'"
J. • 36 grease blockages cleared from sewer mains (wood,rocks,etc)as they flow past. process water and cooling water.
• Grit Chamber-removes heavy particles that
w* •.,' G settle rapidly like gravel,sand,seeds and coffee What's Left Behind
NSanitary Sewer Overflows grounds.As the water enters the chamber, Now,what about the material that has been removed
' rF gravity causes the grit to settle to the bottom. from the water?These solids are called residuals:heavy
:;f. ♦ ,.
;, t >r • Sedimentation(settling)Tanks-as water flows matter that must be treated in order to safely return to
'' <,- - into the tanks,heavy organic particles settle to the environment.
The WRF is located in Wilson at 3100 Stantonsburg Road. the bottom and are withdrawn and pumped to
It is a state-of-the-art regional treatment plant that pro- !. mthe solids handling facilities for additional The following steps are used to further treat the
41%cesses wastewater for approximately 20,000 metered r '" treatment. Floatable material is skimmed off and residuals:
customers and a service population of approximately lit , .;•'Kip-
pumped to the solids handling facilities. • Enclosed heated tanks called digesters use
52,500. The City of Wilson also treats wastewater from a y ..
1r, .F microorganisms to turn the residuals into inert
the Town of Black Creek,the Town of Lucama and the Primary treatment removes approximately 45%of the
Town of Sims. Sanitarysewer overflows 5505 occur when untreat- (inactive),harmless organic matter.
( ) pollution.
ed sewage is discharged into the environment prior to • Belt filter presses are used to remove water from
The term water reclamation defines the treatment or reaching the sewer treatment facilities.These typically Biological Methods-Secondary Treatment the residuals to reduce the volume that must be
processing of wastewater to make it reusable with spe- occur at manholes, pump stations,or broken sewer • Activated Sludge-wastewater is mixed with disposed of.
cific treatment reliability. Reclaimed water must also pipes. Infiltration/inflow(I/I)is unwanted water that millions of microorganisms. During constant
comply with very stringent water quality criteria. The • The treated residuals(organic material)
enters the sewer collection system through deteriorat- aeration(mixing air containing oxygen into the are used by
term water reuse defines the use of treated wastewater ing older pipes,leaking manholes,illegal connections wastewater)the microorganisms(bacteria) area farmers as a fertilizer and soil
for beneficial uses, such as agricultural irrigation and amendment.
industrial cooling. The City of Wilson is committed to such as roof drains,etc. During heavy rains pipes can absorb oxygen and feed on the pollutants.
reusing reclaimed water in areas that drinking water is become overloaded from I/I and cause SSOs.Pipe stop- • Final Settling Tanks-solids made up of
not needed such as irrigation water for Wedgewood Golf pages caused by fats,oils and grease can also lead to microorganisms from the activated sludge Biogas
Course,the Burt Gillette Athletic Complex and industrial SSOs. Replacing and rehabilitating these lines and process settle to the bottom.Some of the A by-product of the digestion process described above is
process/cooling water. The reclaimed water system is manholes reduces I/I into the sanitary sewer system, microorganisms are sent back to the activated the production of methane gas(biogas).The WRF uses
part of the City's water conservation plan. thus protecting the public health, improving treat- sludge process to continue eating pollutants and part of the biogas produced as fuel to heat the digesters,
ment plant efficiency and reducing system mainte- some are removed and sent to the solids thus significantly reducing the amount of time required
NPDES PERMIT COMPLIANCE nonce. Generators provide emergency back-up power handling facilities for disposal.
to digest the solids.The excess is burned off by a waste
The WRF was compliant with all NPDES permit for pump stations and help prevent SSOs. gas burner.The City has future plans to install a system
limits this year. Secondary treatment removes approximately 95%of that will utilize the excess biogas to generate energy
During fiscal year 2017-2018,the City of Wilson did not the pollution;however,in order for the WRF to comply that can be used to operate other equipment or used for
Table Definitions&Key experience any reportable SSOs. The WRF treated 3.1 with permit limits additional treatment is needed. green energy credits.
billion gallons of wastewater during this period.
PPM(Parts per Million)-a unit of measurement. Physical/Chemical/Biological Methods-
Parts per million compares to 1 minute in 2 years. Customers who observe a sanitary sewer overflow
Advanced Treatment
BOD(Biochemical Oxygenshould report these as emergencies to the City "What The Customer Can Do
yg Demand) arequired of Wilson Unified Communications Center at • Nutrient Removal nutrients(phosphorous and
test that determines the amount of oxygen required nitrogen)can cause an overabundance of algae To Help"
[phone].
by microorganisms to consume pollutants.BOD is growth in waterways.As the algae dies,bacteria In order to help the City of Wilson continue a high stan-
measured in PPM. Clientes que observan un desbordamiento del feed on the decaying matter using up oxygen dard of water quality and protection of the environment
clrenaie sanitrario, deben reporter estas situa- piease foiiow these simple steps:
TSS(Total Suspended Solids)-a required test that needed by fish and otheraquatic life.This 2
clones de emergencia al centro de comunicaciones "'
measures the amount of suspended solids in a sample. depletion ofoxygen can lead tofish kills. DO NOT pour grease, fats and
TSS are measured in parts PPM. unificadas de la Ciudad de Wilson, al telefono Phosphorous and nitrogen are removed oils from cooking down the drain-
FC(Fecal Coliform) a required test used to [phone]. biologically and chemically at the treatment instead,collect the grease in a con- 0,4
plant. tainerand dispose ofitinthe garbage. '�
determine the presence of disease causing organisms. I
FC are harmless but are used as indicators of other How Does Your Publicly Owned • Filtration-removes those particles that primary _
Treatment System Work? and secondary treatment could not remove. DO NOT use the toilet as a waste J
organisms(if FC are present others may be present). basket-place a wastebasket in each
FC is measured asnumberofcolonies per100milliliters The treatment system uses the same physical, The wastewater passes through sand filters that
bathroom for the disposal of solid ay
of sample. and biological processes used by nature to clean water. remove remaining particles. Filtration removes
P waste,disposable diapers,condoms, Do not
99.9%of the pollution. pour grease,
MGD(Million Gallons per Day) a unit of measure- Everything we know about water,chemistry,bacteria, and personal hygiene products that fats and oils down
ment for flow volume. hygiene and en ineerin hasgone into this system we • Disinfection-the final stage of treatment uses DO NOT belong in the sewer system.
g g sodium hypochlorite(liquid bleach containing the drain.
use to purify our wastewater.The City maintains about chlorine)to disinfect the water. Disinfection kills DO NOT use the sink to dispose of food scraps-
PLANT PERFORMANCE 359 miles of sanitary sewers lines(piping system that off any disease-causing organisms that may instead,place food scraps in the garbage for disposal
Pollutant Concentration collects and transports the wastewater)and 21 pump- remain after passing through the other with solid wastes,or better yet,start a compost pile.
ing stations that help carry wastewater from homes, treatment steps.Chlorine can cause problems in
Ammonia Nitrogen PPM schools,commercial buildings and industrial sources rivers and streams so we remove the chlorine
before discharging the treated water to
Average 0.06 to the treatment plant. Contentnea Creek.
Permit Limit 1.0/3.0(summer-monthly/weekly)
2.0/6.0(winter-monthly/weekly)
Biochemical Oxygen Demand PPM Protecting The Neuse River
Average 0.3 FOR MORE WATER QUALITY . - The Lower Neuse River Basin Association,Inc.
Permit Limit 5.0/7.5(summer-monthly/weekly) INFORMATION ..��°t` 'r'' •'«. (LNBA)and the Neuse River Compliance Asso-
10.0/15.0(winter-monthly/weekly) y .:•J ciation,Inc,(NRCA)are 501(c) (3)non-profit
Total Phosphorus PPM corporations comprised of municipalities and
City of Wilson - Water Resources industries located in the Neuse River Basin.
Average 0.22 [phone]
Permit Limit 2.00(quarterly) The mission of these organizations is to mon
www.wilsonnc.org/water-resources itor and preserve the waters of the Neuse River
Total Suspended Solids PPM '
P N.C. Environmental Education -- and Neuse River estuary through innovative
Average 0.1 -- and cost-effective wastewater treatment and
www.eenorthcarolina.org
Permit Limit 30.0/45.0(monthly/weekly) " - - reduction strategies. The NRCA group is corn-
Lower Neuse Basin Association posed of 24 wastewater treatment facilities located in the Neuse River Basin. NRCA was
Total Nitrogen Lbs/Yr www.Inba.net issued North Carolina's first basin-wide NPDES permit for nitrogen control January 1,2003
Pounds Discharged 54,549 1 and was reissued in January 1,2008 and January 1,2014.The group was given a mandate
Permit Limit 157,886 River Guardian Foundation, Inc.
www.rivergua rdfd n.ork to reduce their Total Nitrogen discharge by 30%.Through the combined efforts of its en-
Fecal Coliform Colonies/100 milliliters(ml)of sample .. - •. tire membership,the NRCA exceeded the mandated 30%nitrogen reduction by removing
Average 3 _-�►+ NCDEQ over 65%of their nitrogen loading to the Neuse River estuary since 1995.
Permit Limit 200/400(monthly/weekly) [phone] 1 The City ofWilson is proud to be a charter member of both the LNBA and NRCA.
0• h www.deq.nc.gov
Chronic Toxidty ► —.,---r
Test Performed Quarterly Passed all __ Water's Worth It Affiliations
Test
Pass or Fail I �- -
www.watersworthit.or � The City of Wilson Water Reclamation Division is affiliated with the following organizations:
e Sound Rivers • Water Environment Federation • N.C.Water Works Association
Flow Million Gallons per Day(MGD) r .�" • - • American Water Works Association • N.C.Pretreatment Consortium
- .0,W.SOU0C J= tor.
Average 8.36 -
+' • N.C.Water Quality Association • N.C.Rural Water Association
Permit Limit 14.00(monthly) — • N.C.Water Environment Association
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