NC0043176_Annual Performance Report_20070129

9108928871 Public Works
02:28:59 p.m.
2007-01-29 4 /7
CITY OF DUNN
POST OFFICE BOX 1065 is DUNN • NORTH CAROLINA 28335
PUBLIC WORKS DEPARTMENT • [phone] • FAX [phone]
CITY OF DUNN WASTE WATER TREATMENT PLANT
ANNUAL PERFORMANCE REPORT
2006
L GENERAL INFORMATION:
Facility Name:
Contact Person:
Responsible Entity:
Applicable Permit #:
Telephone Number:
Black River Wastewater Treatment Plant
Billy Addison
City of Dunn
NC0043176
910-892-2948
DESCRIPTION OF TREATMENT PROCESS:
The City of Dunn/Black River Waste Water Treatment Plant uses the extended aeration
mechanical and biological processes to treat the waste water entering the plant. The raw
waste water enters the plant through a 30" gravity sewer main which goes through three
enclosed 1580 GPM each lift- pumps and one standby T-12 4000 GPM Gorman Rupp
stand by pump to handle higher flows in emergency situations. The flow then passes thru
a mechanical barscreen which removes floating material and then passes thru an aerated
grit chamber which allows flow to flow less than 1 foot per second which allows any
heavy materials (sand and organics, etc.) to be removed. The flow then goes thru a
partial flow measuring devise, where flows are measured and samples are taken 24 hours
per day for operation and analytical control. The flow goes then to a diversion box that
splits the flow between aeration basins where diffused air is forced under pressure by
three turbin blowers for the bacteria to live function, reproduce in the biological process.
The flow leaves the aeration basins thru a trough at the end of each basin and goes to
another diversion box where the flow is split again and is divided and sent to three 60 ft.
diameter clarifiers. The flow leaves clarifiers and goes over the V-notch weirs and flows
to a CL2 contact chamber where disinfection and declorination takes place before the
flow enters into the wet well of a final pumping station where 3 5000 GPM pumps which
are on variable speed drive controls and pump the finaltreated effluent 3 Y2 miles to the
Cape Fear River where it is discharged. In the clarification process, sludge is settled in
the clarifiers and siphoned to a return sludge pumping station where the sludge is
Home ofMaj. Gen. William C. Lee ' I I I "Father of the Airborne"

9108928871 Public Works
02:29:15 p.m.
2007-01-29 5 /7
recycled to the head of the aeration basins. A portion of the sludge is pulled thru a DAF
(Diffused Air Flotation Unit) where fine air bubbles and polyemers are added to thicken
the sludge before it is pumped to an aerobic digester where air is added for final
stabilization of the sludge. The sludge is then pumped to a 600,000 holding tank where
the sludge is held until volumes and hold times are met so as to meet all vector
requirements. The sludge is then hauled out to by tanker trucks and applies to an EPA
permitted farm site and applied for fertilization at agronomic rates.
IL PERFORMANCE:
The City of Dunn Waste Water Treatment Plant had 1 violation for 2006.
• 11-24-2006 PH Level was 5.93 due to excessive rainfall.
III. This report was published in The Dunn Daily Record local newspaper and run on the City
Local Government cable tv channel. If you have questions concerning this report, please
contact Mr. Billy Addison at the City of Dunn Public Works Department [phone]
or Mrs. Donrie Dukes at the Black River Waste Water Treatment Plant at (910) 892-
2935.
IV. CERTIFICATION:
I certify under penalty of law that this report is complete and accurate to the best of my
knowledge. I further certify that this report has been made available to the users or
customers of the named system and that the users have been notified of its availability.
Billy dleihg)
dison
Assistant Public Works Director
City of Dunn - NC

910892 8871 Public Works
02:29:40 p.m. 2007-01-29
7/7
STATF OF NORTH CAROLINA
COUNTY OF HARNETT
In t1'e matter of:
Ret c. 4. .41740 IT'Y CF DIN_; WASTE l=
•
I, Brenda Fryar, being duly swc_-n, say:6
CLASF; T F Ins ADVERTISING CLERK of THE DAIc
a newspaper published at Dunn, Harnett r
and that the attached clipp.:1-7 is a cop_
Published said newspaper for 1 days, as
■
01/24/2007
as ,-F-cuired by law in the abjve entitle(
This newspaper is qualified for legal ac
in accordance with G.S. 1-597 and 1-598.
Ciassifi
Subsc•rand s:•':prn f c be:fc.n:e
this 24c i da_y of January, 21'07
D. E'ierE0, L :, _` ut ar:/ PlL^-.1c
My commission expires
CITY OF QUNN
WASTE WATER TREATMENT PLANT
ANNUAL PERFORMANCE REPORT
2006
1. GENERAL INFORMATION:
Facility Name: „
Contact Person:
Responsible Entity:
Applicable Pemllt+t`
Telephone Number.
Black River Wastewater Treatment Plant
- Billy Addison • .
City of Dunn
NC0043178
910-892-2948
DESCRIPTION OF TREATMENT PROCESS:
DunnlBladc River Waste Water T Plant Uses the
e aeration mechanical and biologicaf pY ceases to treat the waste
water entering the plant. The raw waste water enters the plant through a 30'
gawky sewer main which goes through.ttaaa enclosed 1580ORMliaph flit
pumps and one standby T-12 4000 GPM Gorman Rupp stand by pump to
)4.fyf tiel jQ gneruoncy eltuations. The flow then passes thiu a
mechanical barscreen which removes floating material and then passes thru
an aerated grit chamber which allows tam to flow less ) to which allows any *ray,rnsterisle ( organics,
.ThsklioW,then goes thru i py,ti1 i ri+aasutete devise. whore hews are
measured and samples are taken 24 hours per day for operation end analyt-
ioai control. The flow gods sren:to•e diversion ban that epfln the flow
between aeration basins where diffused air Is forced under pressure by
three ttubtn blower@ w.lhe bacteria to live function, reproduce In the biolog-
ical process. "hie flowbeaves the aeration basins thru a trough at the end of
each basin and goes to another diversion box where the flow is split again
and is divided end sent to three 60 ft diameter clarifiers. The flow leaves
clarifiers end goes over the V-notch weirs end flows to a CL2 cantaet dram-
ber whcfff disinfection and dedorinadan takes, ace before the flow enters
into the wet well of a final pumping station tlfIM) GPM pumps +Which
• are on variable speed drive controls and pump the final treated effluent 3 _
miles to the Cape Fear River why It Is discharged. In the clarification
process, sludge Is settled In the clarifiers and siphoned to a return sludge
pumping station where the sludge Is recycled to the head of the aeration
haelne,...4ARBIon of the sludge is pulled thru a DAF (Olffused,Alr.Fldtation
Unit) wh ii -bubbles end polyemem are Added t0'• JI IIt*
before it is pumped to an aerobic dlgeslerwhere air le added for Mai
stabilization of the sludge. The sludge Is then pumped to a 600,000 holding
tank where the sludge is held until volumes and hold times are met a 8s to
meet all veoteldgpy)g meats. The sludge is then hauled out to by tanker
trucks and applfet to EPA permitted farm site end applied for fertilization
at agronomic rates.
II. PERFORMANCE:
The City of Dunn Waste Water Treatment Plant had 1 violation for 2006.
• 11-24-2006 PH Level was 5.93 due to excessive rainfall.
lII: Thy report t In The Dunn Delly11100eiggeeknewspaper and
run on the Cly Local Government cable tv channel. If you have question
concerning this report, please contact Mr. Billy Addison at the City of Dunn
Public Works Department [phone] or Mrs. Donnie Dukes at the Black
River Waste. Water Treatment Plant at [phone].
IV. CERTIFICATION:
1 certify under penally of law that this report is complete and accurate to the
best of my knowledge. I further certify that this report has been made avail-
able to the users or customers (Atha named system and that the users have
been notified of its availability.
Billy Addison
Assistant Public Works Director
City of Dunn - NC
1/24, 2007