NC0043176_Inspection_20010529

•
North Carolina
Department of Environment and Natural Resources
Division of Water Quality
Fayetteville Regional Office
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Kerr T. Stevens, Director May 29, 2001
The Honorable Abraham Oudeh
Mayor, City of Dunn
PO Box 1065
Dunn, NC 28335
SUBJECT: Compliance Evaluation Inspection
City of Dunn Black. River WWTP
NPDES Permit No. NC0043176
Harnett County
Dear Mr. Oudeh:
SA/0 I
Alr 7rA / 4
NCDENR
Enclosed is a copy of the Compliance Evaluation Inspection conducted May 11, 2001. As
part of the inspection a tour of the Wastewater Treatment Plant was conducted. All observations and
recommendationsare in Part D. Summary of Findings/Comments of this inspection report: The
cooperation of Mr. Bobby Burnett, Grade IV ORC, was appreciated. The inspection was also part
of renewal of the NPDES permit. During the inspection it was noted that the effluent composite
sampler is not flow proportional. The -requirements for flow proportional composite sampling is
stated as follows in the Administrative Code: 15A NCAC 2B .0503-Surface Water Monitoring:
Reporting
(4)"composite sample means: a sample gathered over a 24 hour period by continuous sampling or
combining grab samples in such a manner as to result in a total sample which is representative of the
wastewater discharge during the sample period. This sample may be obtained by methods given
below, however, the Director may designate the most appropriate method, number and size of
aliquots necessary and the time interval between grab samples on a case -by -case basis. Samples may
be collected manually or automatically.
a. Continuous - a single, continuous sample collected over a 24 hour period proportional to the
rate of flow.
Constant time/variable: volume - a series of grab samples collected at equal time intervals over
a 24 hour period of discharge and combined proportional to the rate of flow measured at the
time of individual sample collection, or
225 GREEN STREET - SUITE 714 / SYSTEL BUILDING / FAYETTEVILLE, NC 28301-5043
PHONE [phone] FAX [phone] WW W.ENR.STATL.NC.US/ENR/
AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER- 50% RECYCLED/10% POST CONSUMER PAPER
DENR TOLL FREE HOTLINE: [phone]

Oudeh
Page 2
May 29, 2001
c. Variable time/constant volume - a series of grab samples of equal volume collected over a 24
hour period with the time intervals between samples determined by a preset number of gallons
passing the sampling point. Flow measurement between sample intervals shall be determined
Constant time/constant volume - a series of grab samples of equal volume collected over a
24 hour period at a constant time interval. This method may be used in situations where
effluent flow rates vary less that 15 percent. The grab samples shall be taken at intervals of
no greater than 20 minutes apart during any 24 hour period and must be of equal size and of
no less that 100 milliliters. Use of this method requires prior approval by the Director." The
Director has given the regional water quality authority to approve this.
Due to the possible cost involved with the installation or modification of effluent flow and
sampling equipment this office requests that the City initiate flow proportional sampling on or before
July 1, 2002. Please reply to this office as to what measures will be required to facilitate flow
proportional composite sampling on or before June 30, 2001.
The objective we should all be striving for if NPDES permit compliance which in turn will
provide preservation of our receiving stream for generations to come.
Please review the attached report. If you or your staff have any questions do
not hesitate to contact me at [phone].
Sincerely
Belinda S. Henson
Environmental Chemist
/bsh
Enclosures
cc: Central Files
DWQ, NPDES Compliance Group
Bobby Burnett, ORC/City of Dunn Black River WWTP

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: 010511 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: 9:45am Permit Effective Date: 000901
Exit Time/Date: 11:45am/010511 Permit Expiration Date: 010930
Name(s), Title(s) of On -Site Representative(s):
Bobby Burnett - (Grade IV )-"ORC"
Kenneth Mark Brantley - (Grade "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)
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Oudeh
Page 4
May 29, 2001
Section D: Summary of Findings/Comments:
1. The `Backup Operator" for this facility is Gary Barefoot (Grade II Wastewater Operators Certification).
The wastewater facility is a Class IV facility which requires the Backup Operator to be certified at least
a Grade III. Contact DWQ training and certification office at 919-733-0026 immediately to submit
the proper Grade Operator for the Backup Position at your facility. Please provide a copy of
your Backup Operator form to this office by June 30, 2001.
2. The three (3) influent screw pumps appeared to be operational. Under normal flows one (1) screw pump
is used at a time. The screw pumps are rotated each day.
3. The automatic bar screen was operational with all screenings properly disposed of through the county
landfill. The bar screen operates on a timer system which allows it to operate every 20 minutes or by
a float system when high flow periods occur.
4. 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 is operated manually every two (2) hours as per Mr. Burnett. There
appeared to be some paint peeling away from the surfaces in this area. Painting in the near future to
assist with maintaining this area could eliminate costly major repairs in the future.
5. The influent composite sampler was 3 degrees Celsius. The proper temperature during sampling is 0-4
degrees Celsius. A certified calibrated thermometer purchased from a laboratory supply company was
in place in the sampler.
6. The influent flow meter was calibrated August 16, 2000 by "Chadwick Instrument Service".
7. The coarse air diffuser system in the aeration basins appeared to be operating adequately. Mixed Liquor
Suspended Solids (MLSS) analyses are completed daily. The most recent result was 3600 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 at approximately 50 lbs/day. It
is added for pH adjustment and as a settling aid.
9. Clarifiers #1 and #2 have a tank depth of 10 feet with sludge depth of 1 foot. Clarifier #3 has a tank
depth of 12 feet with a sludge depth of 1 foot. The walkways of the clarifiers appeared to have some
areas where paint has worn from the surface. A suggestion to paint these areas in the near future to
eliminate major repairs in the future.
10. Chlorine is added for disinfection and sulfur dioxide for dechlorination. As stated in a previous report
dated July 27, 2000, chlorine and sulfur dioxide cylinders are stored in the same building. These
two types of gases should be stored in separate areas to provide safer conditions.

Oudeh
Page 5
May 29, 2001
11. The chlorine contact tank had a sludge depth of less than 6 inches. The sludge depth in the tank should
not exceed 12 inches.
12. The effluent appeared to be clean and free of solids.
13. The effluent composite sampler temperature was adequate at 3 degrees Celsius as per staff.
14. The DAF unit operates 2-3 times/week---20-30 hours/week. Biosolidsflow into the DAF unit and then
into the digester and finally into the holding tank before it is land applied.
15. Approximately 25,000-30,000 gallons of solids are wasted per week.
16. All biosolids are land applied by"Agri-South Biosolids Services, Inc." under permit # WQ0001601.
17. Laboratory records were not reviewed at the time of this inspection.
18. A compliance evaluation analysis report for the period March 1999 through February 2001 did not reveal
any monthly violations. Notice of Violations were not sent during this period. There were some daily
violations for pH and flows noted.
19. Maintenance and operational records were reviewed and appeared to be in order.
Name and Signature of Inspector
Belinda S. Henson
Agency/Office/Telephone
DENR/Fayetteville/[phone]
Name and Signature of. Reviewer Agency/Office/Telephone
Grady Dobson
Action Taken
DENR/Fayetteville/[phone]
Regulatory Office Use Only
Compliance Status
Noncompliance
_Compliance
Date
Date
Date

Section D: Summary of Findings/Comments
Brief Facility Description:
Dunn Black River WWTP operates a 3.75 MGD treatment facility consisting of three (3) 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 digestor. aerated sludge
holding tank, dual gas chlorinators and sulfonators, dual chlorine contact tanks, three effluent
pumps, and optional use of sludge drying beds.
FACILITY SITE REVIEW
No N/A 1. • Treatment units properly operated and maintained.
No N/A 2. • Standby power or other equivalent provision provided.
• Yes N/A 3. Adequate alarm system for power or equipment failure available.
4.
es No N/A
(YFONo N/A
No. N/A 5.
N/A 6.
(Yes) No N/A
No N/A
es No N/A
Yes CNoD N/A
Yes (1i) N/A
Yes eD N/A
Yes) No N/A
7.
8.
9.
10.
Sludge disposal procedures appropriate:
a. Disposal of sludge according to regulations
b. State approval for sludge disposal received.
All treatment units other than backup units in service.
Sufficient sludge disposed of to maintain treatment process equilibrium.
Adequate number of qualified operators on staff.
Established procedures available for training new employees.
Adequate spare parts and supplies inventory maintained.
a. Hydraulic overflows and/or organic overloads experienced
b. Untreated bypass discharge occurs during power failure
c. Untreated overflows occurred since last inspection.
11. Plant has general safety structures such as rails around or covers over
tanks, pits, or wells.
No N/A 12. Plant is generally clean, free from open trash areas...

Ca) No N/A
Ye No N/A
Yes ea N/A
Ye No N/A
Yes o N/A
Yes N/A
Ye No N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No tN A)
No N/A
No N/A
No N/A
No N/A
No N/A
No N/A
No N/A
No N/A
No N/A
No NIA
No N/A
No N/A
No N/A
No N/A
No N/A
No N/A
No N/A
Yes No
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Page 2
13. Screening:
a. Manual
b. Mechanical
c. Buildup of debris
d. Screenings properly disposed of.
14. Grit Removal:
a. Excessive organic content in the grit chamber
b.__ Excessive odors
c. Grit properly disposed of.
15. 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.
16. Trickling Filter:
a. Trickling filter ponding(indicating clogged media)
b. Leak at center column of trickling filter's distribution arms
c. Uneven distribution of flow on trickling filter surface
d. Uneven or discolored growth
e. Excessive sloughing of growth
f. Odor
g. Clogging of trickling filter's distribution arm orifices
h. Filter flies, worms, or snails.
17. Rotating Biological Contactors (RBC):
Development of white biomass on rotating biological contactor
media
Excessive sloughing of growth
Excessive breakage of rotating disks or shafts in RB.0 units
Excessive breakage of paddles on brush aerators
Shaft, bearing, drive gear, or motor failure on disk or brush aerators.
a.
b.
c.
d.
e.

Yes at N/A
Yes No
Yes c N/A
Yes N/A
Yes CID N/A
Yes eta N/A
Yes alb N/A
gay
Yes No
Yes No N/A
Yes No N/A
Yes No N/A
Page 3
18. 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.
19. Stabilization Ponds/Lagoons:
a. Excessive weeds including duckweed in stabilizationponds
b. Dead fish or aquatic organisms
c. Buildup of solids around influent pipe
d. Excessive scum on surface.
20. Secondary Clarifier:
Yes N/A a. Excessive gas bubbles on surface
Yes N/A b. Unlevel overflow weirs
Yes a N/A c. Weir blockage
Yes ga N/A d. Evidence of short circuiting
Yes N/A e. Excessive buildup of solids in center well of circular clarifier
Yes CgB N/A f. Pin floc in overflow
Yes to N/A g. Ineffective scum rake
No N/A h. Floating sludge on surface
Yes C. N/A i. Excessive high sludge blanket
Yes NI�O' ' N/A j. Clogged sludge withdrawal ports on secondary clarifier.
Yes No
' Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes ' No N/A
21. 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.
22. Chlorination Unit:
Yes No N/A a. Sludge buildup in contact chamber
Yes N/A b. Gas bubbles
Yes N/A c.. Floating scum and/or solids
No N/A d. Adequate ventilation of chlorine feeding room and storage area
Yes No N/A e. NIOSH-approved 30 minute air pack
Yes No &Di All standing chlorine cylinders chained in place
Is No N/A g. All personnel trained in the use of chlorine
No N/A h. Proper chlorine feed, storage, and reserve supply.

Page 4
Yes No 23. Ultraviolet radiation disinfection present and in use.
24. Dechlorination:
Yes No N/A a. Proper storage of sulfur dioxide cylinders
No N/A b. Adequate ventilation of sulfur dioxide feeding room
Yes NEo N/A c. Automatic sulfur dioxide feed or feedback control not operating
properly.
Yes CW N/A
Yes N/A
Yes No
Yes qs.D N/A
Yes No (N%
Yes No N/A
Yes No N/A
Yes No !�(I
Yet No N/A
Yes o N/A
Yes N/A
No N/A
No N/A
ag No N/A
Yes No c
Yes No N/A
Yes No N/A
Yes No N/A
Yes No gi
Yes No N/A
Yes No N/A
25. Aerobic Digester:
a. Excessive foaming in tank
b. Noxious odor
c. Mechanical aeration failure
d. Clogging of diffusers.
26. Anaerobic Digester:
a. Floating cover tilting
b. Gas burner operative
c. Supernatant has a sour odor.
27. Sludge Drying and/or disposal:
Poor sludge distribution on drying beds
Vegetation in drying beds -
Dry sludge remaining in drying beds
Dry sludge stored on site
Filtrate from sludge drying beds returned
Approved disposal site for the sludge
Sludge land applied.
a.
b.
c.
d.
e.
,f.
g.
to front of plant
28. Filter Press:
a. High level of solids in filtrate from filter presses or vacuum filters
b. Thin filter cake caused by poor dewatering
c. Sludge buildup on belts and/or rollers of filter press .
d. Excessive moisture in belt filter press sludge cake..
29. Polishing Ponds or Tanks:
a. Objectionable odor, excessive foam, floating solids, or oil sheens on
water surface
b. Solids or scum accumulations in tank or at side of pond
c. Evidence of bypassed polishing ponds or tanks because of low
capacity.

Yes N/A
Yes ea N/A
Yes No N/A
No N/A
Cta No N/A
Yes O N/A
Yes S5 N/A
Yes No
Yes No �[/A
Yes N/A
Clkra No N/A
Yes No N/A
Page 5
30. 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.
31. Flow Measurement:
a. Proper placement of flow measurement device
b. Flow meter calibrated
c. Buildup of solids in flume or weir
d. Broken or cracked flume or weir
e. Properly functioning magnetic flowmeter
f. Clogged or broken stilling wells
g. Weir plate edge corroded or damaged
h. System capable of measuring maximum flow
i. Flow measurement error less than 10%.
32. Sampling:
(fc. No N/A a. Sampling and analysis completed on parameters specified by permit
(Y) No N/A b. Samples refrigerated during compositing
No N/A c. Composite sample temperatures maintained at 0 to 4 degrees Celsius
during sampling
Yes No N/A d. Contract laboratory used for sample analysis
Yes Q• N/A e. Composite samples obtained are flow proportional.
RECORDKEEPING AND REPORTING
Yes No N/A 1. Records and reports maintained as required by permit.
Yes No N/A 2. All required information available, complete, and current.
Yes No N/A 3. Records maintained for 3 years and all sludge records maintained for 5
years.
Yes No N/A 4. Analytical results consistent with data reported on DMRs.
5. Sampling and analyses data adequate and include:
Yes No N/A a. Dates, times, and location of sampling
Yes No N/A b. Name of individual performing sampling
Yes No N/A c. Results of analyses and calibration
Yes No N/A d. Dates of analyses
Yes No N/A e. Name of person performing analyses.

Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
No N/A
Yes No N/A
Yes No
es No N/A
Yes No N/A
Yes
Page 6
6. Monitoring records adequate and include:
a. Monitoring charts kept for 3 years
b. Flowmeter calibration records kept for 3 years.
7. Laboratory equipment calibration and maintenance records adequate.
8. BOD incubator temperature maintained at 20 +/- 1 Degrees Celsius
and the temperature maintained in a log for every day of operation.
9. Fecal coliform incubator maintained at 44.5 +/- 0.2 Degrees
Celsius and the temperature maintained in a log for every day of
operation.
10. Plant records adequate and include:
a. O & M Manual
b. "As -built" engineering drawings
c. Schedules and dates of equipment maintenance repairs
d. Equipment data cards.
11. Pennittee is meeting compliance schedule.
12. DMRs complete and include all NPDES permit required parameters.
13. ORC visitation logs available and current.
No N/A 14. ORC certified at a level equal to or greater than the classification of
the wastewater facility.
Yes No N/A 15. Backup Operator certified at one level less than the classification of
the wastewater facility or greater.
No. N/A
Ye No N/A
Revised 7/11/00
by Belinda Henson
16. Current copy of the complete NPDES permit on site.
17. Facility description verified as contained in NPDES permit.

INSPECTION REPORT
UPDATE OPTION: TRX: 5IF KEY: NC0043176INSCEI 010511
SYSMSG: *** DATA ADDED SUCCESSFULLY ***
PERMIT--- NC0043176 REG/COUNTY-- 06 HARNETT
FACILITY-- DUNN, CITY - WWTP LOC-- DUNN
INS TYPE
CEI
NEXT PLANNED
INSPECTION INSPECTED BY:
DATE: 010511 HSB
REPORT INSPECTION DMR RESPONSE RECEIVED
DATE STATUS STATUS DUE DATE DATE
010529 C C 010630
COMMENTS: