NC0043176_Inspection_20020327

AVA
NCDENR
North Carolina Department of Environment and Natural Resources
Michael F. Easley, Governor
The Honorable Abraham Oudeh
Mayor, City of Dunn
P.O. Box 1065 •
Dunn, NC 28335
March 27, 2002
SUBJECT:. Compliance Evaluation Inspection
City of Dunn Black River WWTP
NPDES Permit No. NC0043176
Harnett County
Dear Mr. Oudeh:
William .G.Ross Jr., Secretary
Gregory J. Thorpe, Ph.D.
Acting Director
Division of Water Quality
Enclosed is a copy of the Compliance Evaluation Inspection conducted March 21.2002.
As part of the inspection a tour of the Wastewater Treatment Plant was conducted. All observations
and recommendations are in Part D. Summary of Findings/Comments of this inspection report. The
cooperation of Mr. Bobby Burnett, Grade IV ORC, was appreciated. During the inspection a copy
of the NPDES Compliance Reminders were reviewed and left with Mr. Burnett. Mr. Joseph
Campbell, Public Utilities Director/Grade III Backup Operator also discussed the plans for installing
a parshall flume, ultrasonic flowmeter, and a chart recorder. With these additions the facility can
comply with effluent flow proportional sampling. As per your request dated March 7, 2002, the
facility is granted an extension until September 20, 2002 to complete the project. Plans are supposed
to be submitted to Raleigh by March 29, 2002. As a reminder preservation of the Waters of the State
can only be acquired through consistent NPDES permit compliance.
Please review the attached report. If you or your staff have any questions do not hesitate
to contact me at 910-486-1541.
Sincerely, _ `I
Belinda S. Henson
Environmental Chemist
/bsh
Enclosures
cc: Mr. Bobby Burnett, ORC, City of Dunn WWTP
Fayetteville Regional Office
225 Green Street— Suite 714, Fayetteville, North Carolina 28301-5043
Phone: [phone] FAX: [phone] Internet: www. enr. state. nc. us/ENR
An Equal Opportunity \ Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper

NPDES COMPLIANCE INSPECTION REPORT
North Carolina Division of Water Quality
Fayetteville Regional Office
Section A. National Data System Coding
Transaction Code: N NPDES NO. NC0043176 Date: 020321 Inspection Type: C
Inspector: S Facility Type: 1 Reserved:
Facility Evaluation Rating: 4 BI: N QA: N Reserved:
Section B: Facility Data
Name and Location of Facility Inspected:
City of Dunn Black River WWTP
Entry Time/Date: 9:55am/020321 Permit Effective Date: 000901
Exit Time/Date: 2:30pm/020321 Permit Expiration Date: 010930
Name(s), Title(s) of On -Site Representative(s):
Bobby Burnett (Certified Grade IV Operator) - "ORC"
Kenneth Mark Brantley - (Grade III Temporary Operator)/Chemist
Phone Number(s): [phone]
Name, Title and Address of Responsible Official
Mr. Abraham Oudeh, Mayor
PO Box 1065
Dunn, NC 28335
Contacted: no
Section C: Areas Evaluated During Inspection
(S = Satisfactory, M = Marginal, U = Unsatisfactory, N = Not Evaluated, N/A = Not Applicable)
0
lte evi
:eEorls[:itetort
Ns!:* Measurement S
.............
uleConapIaideeSchched................
;.:Operatio..n .
11dge t)sp'osae;
lantenace;

Oudeh
Page 3
March 27, 2002
Section Di Summary of Findings/Comments:
1. The three (3) influent screw pumps appeared to be operational. The screw •pumps are rotated each day
as per staff. One ptimp operates under normal flows.
2. The influent flow meter was calibrated July 16, 2001 by "Chadwick Instrument Service Co:, Inc. The
flow meter is a Sigma (Ultrasonic, open channel). The flow range it reads is 0 - 6500 gpm.
3. A backup generator is onsite to utilize operating the wastewater facility when power cannot be supplied."
The generator is operated every Monday. ' It is documented in their records when the generator is
operated.
4 The automatic bar screen appeared to be operational. It operates on a timer system every 15 - 20
minutes. Screenings go into a wheel barrel and from there is . emptied into a dumpster where it is
disposed of through the county landfill.
5. ,The influent composite sampler refrigeratortemperature was 4 degrees C. The facility presently is
packing the sample with ice to ensure the proper temperature. Plans are to replace the present
-refrigerator unit with a new unit which can cool the sample as needed.
6. The grit removal system was operational with all grit properly contained and then disposed of in the
county landfill The system operates with a air lift pump and a agar which pulls the grit out and it goes
into a wheel barrel. The system operates 1 hour/shift. As noted in the last inspection dated M . y 29,
2001 c there is paint peeling from the surfaces in this area. Please note that maintaining these areas are
part of your NPDES permit.
7. The coarse air diffusers in the aeration basin appeared to be operating adequately. The most recent
Mixed Liquor Suspended Solids (MLSS) result was 3400 mg/L.
8. Soda ash is added to the MLSS at the distribution box before it enters the clarifiers. Water is added to
the soda ash to form a slurry and it is drip fed into the distribution box. It is added for pH adjustment
and as a settling aid.
9. The sludge depths of the clarifiers are as follows:
Clarifier #1 - 2 feet with a tank depth of 10 feet
Clarifier #2 - 2 '/2 feet with a tank depth of 10 feet
Clarifier #3 -3 '/ feet with a tank depth of 12 feet.
10. The facility wastes" approximately 175,000 gallons per week from the clarifiers. The MLSS result
triggers when to waste.
11. The facility has begun painting areas in the plant that were noted in the previous report.

Oudeh
Page 4
March 27, 2002
12. Chlorine is added for disinfection and sulfur dioxide for dechlorination. Both gases are stored in the
same building which can create a hazardous area. Please note this item has been addressed in
previous reports dated July 27, 2000 and May 29, 2001.
13. A recommendation to incorporate a flow paced system into your chlorine system. This type of
system would save on chemical usage for disinfection.
14. The effluent appeared to be clean and free of solids. It is pumped to the Cape Fear River to be
discharged.
15. The effluent composite sampler temperature was 1 degree C. The acceptable temperature range of
samples during storage is 1.0 - 4.4 degrees C.
16. The DAF unit has been operating 5 days/week. Solids from the DAF unit are approximately 5%.
Polymer is added to help dewater the biosolids. Biosolids flow into the DAF unit and then into the
digester and finally into the holding tank before it is land applied.
17. All biosolids are land applied by "Agri -South Biosolids Services, Inc" under permit # WQ0001601.
18. Laboratory records were reviewed for the months September and October 2001 and compared to DMRs.
In October 16 an Ammonia value was reported as <0.10 mg/L and the laboratory records revealed a
value of .112 mg/L. Please submit an amended report for the month of October 2001. The following
procedure should be followed in submitting corrected reports:
A. All corrected data should be written in red ink or hi -lighted.
B. At the top of the Effluent page, the words "Corrected Report" or "Amended Report" should be
written in red ink on all copies. This will differentiate between originally submitted report and
corrected report.
C. Two (2) copies of the corrected report should be submitted to this Division and one (1) copy
must be retained by the permittee.
D. A brief explanation for the correction should be written either on the back side of the Effluent
page or in a cover letter accompanying the reports.
19. The facility has a certified laboratory on site which analyzes the required NPDES permit parameters with
the exception of Total Nitrogen and Toxicity. The Total Nitrogen parameter is analyzed by the
laboratory "Chemical & Environmental Technology, Inc". Toxicity is analyzed by "Similabs".
20. Maintenance and operational records were reviewed and appeared to be in order.

Name and Signature of Inspector
Belinda S. Henson
tAlot L) : ' .
Agency/Office/Telephone Date
DENR/Fayetteville/[phone] 3 — mac —0. 1.
Name and Signature of Reviewer Agency/Office/Telephone
Paul E. Rawls
Action Taken
DENR/Fayetteville/[phone]
Regulatory Office Use Only
Compliance Status
Noncompliance
_Compliance
Date
Date

Section D: Summary of Findings/Comments
Brief Facility Description:
Operate a 3,75 MGD WWTP consisting of influent screw pumps, suction lift pump, mechanical
bar screen, grit chamber, influent flow measurement, dual aeration basins, three final clarifiers,
DAF sludge unit, aerobic sludge digester, aerated sludge holding tank, dual gas chlorinators and
sulfonators, dual chlorine contact tanks, three effluent pumps, and optional use sludge drying
beds.
FACILITY SITE REVIEW
('No N/A 1. Treatment units properly operated and maintained.
es No N/A 2. Standby power or other equivalent provision provided.
es No N/A 3. Adequate alarm system for power or equipment failure available.
4. Sludge disposal procedures appropriate:
No N/A a. Disposal of sludge according to regulations
es� No N/A b. State approval for sludge disposal received.
'es) No N/A 5. Sufficient sludge disposed of to maintain treatment process equilibrium.
�es} No N/A 6. The ORC and Backup Operator are officially designated with
NCDENR/DWQ Training and Certification Unit.
iYes No N/A 7. Adequate spare parts and supplies inventory maintained.
Ye No N/A 8. Plant has general safety structures such as rails around or covers over
tanks, pits, or wells.
es No N/A 9. Plant is generally clean, free from open trash areas.
Yes No N/A
CYes No N/A
Yes c N/A
&,. No N/A
Yes N/A
Yes (Tay N/A
e:s` No N/A
10. Screening:
a. Manual
b. Mechanical
c. Buildup of debris
d. Screenings properly disposed of.
11. Grit Removal:
a. Excessive organic content in the grit chamber
b. Excessive odors
c. Grit properly disposed of.

Page 2
Yes No
. Yes - No
.Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No.
Yes No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
12.
Erft
N/A
NIA
N/A
N/A
N/A
N/A
N/A
N/A
NIA
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Primary clarifier:
a. Excessive gas bubbles
b: Black and odorous wastewater
c. Poor suspended solids removed
d.. Excessive buildup of solids in center well of circular clarifier
e. Weirs level .
f. Weir blockage
g. Evidence of short circuiting
h. Lack of adequate scum. removal
i. Excessive floating sludge _
j. Broken sludge scraper.
13. Trickling Filter:
a. Trickling filter ponding(indicating 'clogged media)
Leak at center column oftrickling flter's distribution arms
Uneven distribution of flow on trickiinjfilter•surface
Uneven or discolored growth
Excessive sloughing of growth
Odor
Clogging of trickling filter's distribution
Filter •flies, worms, or snails.
14.
Yes (a. N/A
Yes No
• Yes 0" N/A
Yes N/A
Yesee NIA
Yes sac N/A
Yes ED N/A
Yes
Yes
Yes
Yes
No C1�?
No N/A
No N/A
No N/A
b.
c.
d.
-e.
f.
g•
h.
arm orifices
Activated Sludge Basins/Oxidation Ditches:
a. Dead spots
b. Failure of surface aerators
c. Air rising in clumps
d. Dark foam or bad color
e. Thick billows of white, sudsy foam
f Air rising unevenly
g. Excessive air leaks in compressed air piping.
15. Stabilization Ponds/Lagdoris:
a. Excessive weeds including duckweed in stabilization ponds
b. Dead fish or aquatic organisms
c. Buildup of solids around influent pipe.
d. Excessive scum on surface.

Page 3
Yes es) N/A
es' No N/A
Yes GS) N/A
Yes IS N/A
Yes CO. N/A •
Yes 1QJ N/A
• `es ` No N/A
Yes eta} N/A
Yes Tg.) N/A
Yes (toy N/A
• Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
N/A
N/A
N/A
N/A
N/A
YesTO N/A
Yes N/A
Yes N/A
es:"No N/A
Yes No N/A
Yes No
e No N/A
Leh No N/A
Yes No
Yes ) N/A
des` `) No N/A
tj;) No N/A
Yes N/A
Yes moo' N/A
Yes No 01
Yes C f' N/A
17.
16. Secondary Clarifier:
a. Excessive gas bubbles on surface
b. Level overflow weirs
c. Weir blockage
d. Evidence of shortcircuiting •
e. Excessive buildup of solids in center well of circular
f. Pin floc in overflow
g. Effective scum rake
h. Floating sludge on surface
i. Excessive high sludge blanket
j. Clogged sludge withdrawal ports
Filtration: -
a. Filter surface clogging
b. Short filter run
c.. Gravel displacement of filter media
d. Loss of filter media during backwashing"
e. Recycled filter backwash water in excess of 5 percent
f. Formation of mudballs in filter media.
clarifier
on secondary clarifier.
18. Chlorination Unit:
a. Sludge buildup in contact chamber
b. Gas bubbles
c. Floating scum and/or solids
d. Adequate ventilation of chlorine feeding room and
e. NIOSH-approved 30 minute air pack
f All standing chlorine cylinders chained in place
g. All personnel trained in the use of chlorine
h. Proper chlorine feed, storage, and reserve supply.
19.
Ultraviolet radiation disinfection present and in -use.
storage area
20. Dechlorination:
a. Proper storage of sulfur dioxide cylinders
b. Adequate ventilation ofsulfar dioxide feeding room
c. Automatic sulfur dioxide feed or feedback control operating
properly.
21. Aerobic Digester:
a. Excessive foaming in tank
b. Noxious odor
c. Mechanical aeration failure
d. Clogging of diffusers.

Page 4
22. Anaerobic Digester:
Yes No (NT' a. Floating cover tilting
Yes No N/A b. .Gas burner operative
Yes No `f
Yes 05` .N/A
Yes G N/A
Yes N/A
-Yes No N/A
Yes o` N/A
es No N/A
23. Sludge Drying and/or disposal:
a. Poor sludge distribution on drying beds
b. Vegetation in drying beds
c. Dry sludge remaining in drying beds
d. Dry sludge stored on site
e. :Filtrate from sludge drying beds returned to front of plant
£ Sludge disposal through county landfill.
g. Sludge land applied.
24. Filter Press:
Yes No N/A a. High level of solids in filtrate from filter presses -or vacuum filters
Yes No N/A b. Thin filter cake caused by poor dewatering
Yes No N/A • c. Sludge buildup on belts and/or rollers off lter press
Yes No N/A d. Excessive moisture in belt filter press sludge cake.
25. Polishing Ponds or Tanks:
Yes No %A a. Objectionable odor, excessive foam, floating solids, or oil sheens on
water surface
Yes No N/A b. Solids or scum accumulations in tank or at side of pond
Yes No N/A c. Evidence of bypassed polishing ponds or tanks because of low
capacity.
Yes �"�a N/A
Yes dci N/A •
Yes a) N/A
26. Plant Effluent:
a. Excessive suspended solids, turbidity, foam, grease, scum, color, and
other macroscopic particulate matter present
b. Potential toxicity (dead fish, dead plant at discharge)
c.- Outfall discharge line easily accessible. .
27. Flow Measurement: •
Cep No N/A a. Proper placement of flow measurement device
Tel No N/A b. Flow meter calibrated
Cie No N/A c. Buildup of solids in flume or weir
-CesJ No N/A d. Broken or cracked flume or weir
Yes No Gig) e. Clogged or broken stilling wells
Yes No N/A f Weir plate edge corroded or damaged
Yes No N/A g. Flow measurement error less than 10%.

Page 5
No N/A
e_p No N/A
es No N/A
Yes OD -N/A
28. Sampling:
a. Sampling and analysis completed on parameters specified by permit
b. Composite sample temperatures maintained at 4 degrees Celsius or
less (but above freezing) duringsampling
c. Contract laboratory used for sample analysis .
d. Effluent composite samples obtained are flow proportional.
RECORDKEEPThTG AND REPORTENG
Yps No _N/A 1. Records and reports maintained as required by permit.
es No N/A 2. All required information available, complete, and current.
Ye No N/A . 3. Records maintained for 3 years and all sludge records maintained for 5
years.
rfe� No N/A 4. Analytical results consistent with data reported on DMRs:
5. Sampling and analyses data adequate and include: -
No N/A a. Dates, times, and location of sampling
No N/A b. Name of individual performing sampling
e§-,No .N/A c. Results of analyses and calibration
fet No N/A d. Dates of analyses
(c es) No N/A e. Name of person performing analyses.
Yes No N/A
No N/A.
b. Monitoring records adequate and include:
a. Monitoring charts kept for 3 years
b. Flowmeter calibration records kept for 3 years.
es) No N/A 7. The pH meter is calibrated daily with two buffers and checked with a
third buffer and properly documented.
Ye) No N/A 8. Expiration dates of pH buffers adequate.
Yes) No N/A
9. All thermometers used in NPDES permit reporting is calibrated
annually with an NIST certified thermometer or a traceable
thermometer annually and documented.
(yej)No N/A 10. The following NPDES permit required parameters are analyzed on site:
pH, Temperature, Dissolved Oxygen and Chlorine Residual.

Page6 _
No N/A 11. The NPDES permit required parameter Total Chlorine Residual is
. analyzed by approved method.
Yes No N/A 1'2 BOD incubator temperature Maintained at 20 +/- 1 Degrees Celsius
and the temperature maintained in a log for every day of operation.
Yew' No N/A 13 Fecal colifortn incubator maintained at 44.5 +/- 0.2 Degree Celsius and
the temperature maintained in a log for every day of operation.
14. Plant records adequate and include:
1 No N/A a. 0 & M Manual . •
(e- No N/A b. "As -built" engineering drawings
Te JNo N/A c. Schedules and dates of equipment maintenance repairs
Yes No Lehi d. Equipment data -cards.
Yes No / : 15. Permittee is meeting compliance schedule.
(sires) No N/A 16. DMRs complete and include all NPDES permit required parameters.
Yes 62 N/A 17. The facility has a permitted flow greater than 5 MGD and is required
to operate seven days per week 24 hours a day. efqcfeof 71. hbU rs k dq
Y'e No N/A 18. ORC visitation logs available and current:
No N/A 19. ORC certified at a level equal to or greater than the classification of
the wastewater facility.
No N/A 20. Backup Operator certified at one level less than the classification of
the wastewater facility or greater.
Yes No N/A 21. Current copy of the complete NPDES permit on site.
Yes N o N/A 22. Facility description verified as contained in NPDES permit.
Yew No N/A 23. Facility analyzes process control parameters for example: ItiII,SS,
MCRT, Settleable Solids and others that are applicable.
Yes No %A 24. Industrial Waste Surveys (IWS) sent to all possible Significant
Industrial Users (SIUs) within the last five years (especially new
industries).
Revised 7/16/01
by Belinda Henson