NC0043176_Inspection_20000727

NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
FAYETTEVILLE REGIONAL OFFICE
July 27, 2000
The Honorable Abraham Oudeh
Mayor, City of Dunn
PO Box 1065
Dunn, NC 28335
SUBJECT: Compliance Evaluation Inspection
City of Dunn
Wastewater Treatment Plant
NPDES Permit No. NC0043176
Harnett County
Dear Mr. Oudeh:
Enclosed is a copy of the Compliance Evaluation Inspection conducted July
19, 2000
During the inspection a tour of the Wastewater Treatment Plant was conducted.
The observations and recommendations from the inspection are in Part D. Summary
of-Findings/Comments of this inspection report. The objective we should all be
striving for is 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 910-486-1541.
Sincerely,
/ r
Belinda S. Henson
Environmental Chemist
/bsh
Enclosures
CISMEMESE
225 GREEN STREET, SUITE 714 / SYSTEL BLD. FAYETTEVILLE, NORTH CAROLINA 28301-5043
PHONE [phone] FAX [phone]
AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/1O% 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: 000719 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:
WWTP
Entry Time: 10:00am
Exit Time/Date: 3:oopm/000719
Name(s), Title(s) of On -Site Representative(s):
Bobby Burnett (Certified Grade IV) - "ORC"
Kenneth Mark Bradley - "Chemist"
Phone Number(s): [phone]
Name, Title and Address of Responsible Official:
Mr. Abraham Oudeh, Mayor
PO Box 1065
Dunn, NC 28335
Section C: Areas Evaluated During inspection
Permit Effective Date: 960901
Permit Expiration Date: 010731
Contacted: no
(S = Satisfactory, M = Marginal, U = Unsatisfactory, N = Not Evaluated, N/A = Not Applicable)
Permit:`'
ecords/Reports:
,Facility Site Review:
Flow'Measuremerit: S
Laboratory:'S
Effluent/Receiving .Waters:
retreatnient: N/A
Compliance ;Schedule::
Self Mor"toring Pro:gram:,S:'
Sludge ;Disposal: S
`Operation.&&�Maintenance S
'Other

Section D: Summary of Findings/Comments:
1. Three (3) screw pumps are used to pump influent flow into the wastewater plant. Under normal flow
conditions one (1) screw pump is used at a time. The pumps rotate between the three by a timer
device.
2. The automatic bar screen was operational with all screenings properly disposed of through the
county landfill.
3. The grit removal system was operational with all grit properly contained and then disposed of in the
county landfill. There appeared to be some paint peeling away from. the walkway of this area which
could potentially cause major repairs in the future. A railing beside the stairway to the grit removal
system appeared to be loose. This area should be secured to ensure employee safety.
4. The influent composite sampler temperature was 4.9 Degrees Celsius. The temperature should
be maintained at 0-4 Degrees Celsius. A recommendation to immerse a thermometer in a
glycerine solution instead of tap water to assist in accurate and stable reading of the temperature in
the sampler refrigerator. As a reminder all thermometers should be calibrated annually with a NIST
certified thermometer.
5. Rainfall gages are in place onsite and rainfall is documented with plant operation records. A
suggestion was made during the inspection to document rainfall on the Discharge Monitoring
Reports (DMRs).
6. The coarse air diffuser system in the aeration basin appeared to be operating adequately. Mixed
Liquor Suspended Solids (MLSS) analyses are completed each week as part of process control in
operating the plant.
7. Clarifiers #1 and #2 have a depth of 10 feet with sludge depths of less than 1 foot. Clarifier #3 had
approximately 2 feet of sludge depth with a tank depth of 12 feet.
8. Chlorine is added for disinfection and sulfur dioxide for dechlorination. As a recommendation the
chlorine and sulfur dioxide should be added flow proportionally to assist with proper
treatment to eliminate NPDES permit violations. Chlorine and sulfur dioxide cylinders were
stored in the same building. These two types of gases should be stored in separate areas.
9. The chlorine contact tank had a sludge depth of less than 6 inches.
10. The effluent appeared to be clean and free of solids. -
11. The effluent composite sampler temperature was2.9 Degrees Celsius. As stated in comment #4 a
thermometer immersed in glycerine is recommended in the sample refrigerator for stable
temperature monitoring.
12. The DAF unit was not operating at the time of the inspection. The "ORC" stated it is operated
approximately twice a month.
13. The sludge digester and holding tank appeared to have ample storage capacity needed for sludge
disposal. Sludge is disposed of by land application with approximately 400 acres permitted for this
usage.

-continued-
14. The influent flow meter was1calibrated October 26, 1999. At the time of the inspection the flow
meter was not operating due to an electrical storm.
15. A Scott Air pack for respiratory safety was on site and appeared to be obsolete. A recommendation
would be to purchase a positive pressure mask as a replacement.
16. All NPDES permit required parameters are analyzed by the laboratory on site with the exception of
the Toxicity which is contracted to complete by "Burlington Research Inc."
17. Laboratory records were reviewed for September 1999 and January 2000 and compared to Discharge
Monitoring Reports (DMRs). For the dates September 28-30 conductivity results were not correctly
reported on the DMR. Within thirty (30) days of receiving this report a corrected report for the
month of September 1999 should be submitted by the following procedure:
A. All corrected data should be written in red ink or hi -lighted.
B. At the top to 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 bach side of the
Effluent page or in a cover letter accompanying the reports.
18. A compliance evaluation analysis report for the period June 1999 through May 2000 revealed a pH
violation for the month of September.
19. The designated "Backup Operator" did not meet the requirements of certification at one level less
than the classification of the wastewater treatment facility or greater. The facility is a Grade IV
facility with a Grade II "Backup Operator". Please contact the Training and Certification Unit for
further assistance at [phone].
20. All records should be in permanent ink to protect them. When corrections are necessary draw a line
through the information that is to be ommitted and document the correct information with the initials
of the person making the corrections.
21. As a reminder the present NPDES permit expires July 31, 2001. A renewal application should
be applied for at least 180 days before expiration.

Name and Signature of Inspector Agency/Office/Telephone Date
Belinda S. Henson „N ., 4zc , '4.14.6.,-)0 DENR/Fayetteville/[phone]
Don Register DENR/Fayetteville/[phone] 7
Name and Signature,of Reviewer
Agency/Office/Telephone Date
Paul E. Rawls DENR/Fayetteville/[phone]
Action Taken
Regulatory Office Use Only
Compliance Status
Noncompliance
Compliance
Date

Section D: Summary of Findings/Comments
Brief Facility Description:
Dunn Black River WWTP operates a 3.75 MGD treatment facility 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, effluent flow meters, and optional use sludge drying beds.
FACILITY SITE REVIEW
No N/A 1. Treatment units properly operated and maintained.
Yes No N/A 2. Standby power or other equivalent provision provided.
No N/A 3. Adequate alarm system for power or equipment failure available.
4. Sludge disposal procedures iTh3:7 No N/A a. Disposal of sludge according to regulations
es; No N/A b. State approval for sludge disposal received.
No N/A 5. All treatment units other than backup units in service.
" No N/A 6. Sufficient sludge disposed of to maintain treatment process equilibrium.
No N/A 7. Adequate number of qualified operators on staff.
s ; No N/A 8. Established procedures available for training new employees.
es No. N/A 9. Adequate spare parts and supplies inventory maintained.
Yes ( N/A 10. a. Hydraulic overflows and/or organic overloads experienced
Yes N/A b. Untreated bypass discharge occurs during power failure
Yes No N/A c. Untreated overflows occurred since last inspection.
'Ye No N/A 11. Plant has general safety structures such as rails around or covers over
tanks, pits, or wells.
es No N/A 12. Plant is generally clean, free from open trash areas.

(Y s) No N/A
I(�'es No N/A
Yes (N-67.) N/A
(. ee No N/A
Yes ( o) N/A
Yes N/A
(Yes) No N/A
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.
Page 2
15. Primary clarifier:
Yes No (N7A-) a. Excessive gas bubbles
Yes No N/A b. Black and odorous wastewater
Yes No N/A c. Poor suspended solids removed
Yes No N/A d. Excessive buildup of solids in center well of circular clarifier
Yes No N/A e. Weirs level
Yes No N/A f. Weir blockage
Yes No N/A g. Evidence of short circuiting
_ Yes No N/A h. Lack of adequate scum removal
Yes No N/A I. Excessive floating sludge
Yes No N/A j. Broken sludge scraper.
Yes No (N/AT
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
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):
Yes No (1V/A> a. Development of white biomass on rotating biological contactor
media
Yes No N/A b. Excessive sloughing of growth
Yes No N/A c. Excessive breakage of rotating disks or shafts in RBC units
Yes No N/A d. Excessive breakage of paddles on brush aerators
Yes No N/A e. Shaft, bearing, drive gear, or motor failure on disk or brush aerators.

Yes o') N/A
Yes No (NlA�
Yes No N/A
Yes () N/A
Yes N/A
Yes (NO) N/A
Yes (No7 N/A
Yes . No CF i
Yes No N/A
Yes No N/A
Yes No N/A
Yes av N/A
Yes QVo7 N/A
Yes N) N/A
Yes (Ni)) N/A
Yes (a) N/A
Yes go N/A
Yes 'No) N/A
Yes 9% N/A
Yes N/A
Yes (Noy N/A
18. Activated Sludge Basins/Oxidation Ditches:
a.
b.
c.
d.
e.
f.
g•
Dead spots
Failure of surface aerators
Air rising in clumps
Dark foam or bad color
Thick billows of white, sudsy foam
Air rising unevenly
Excessive air leaks in compressed air piping.
Page 3
19. Stabilization Ponds/Lagoons:
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.
20. • Secondary Clarifier:
Excessive gas bubbles on surface
Unlevel overflow weirs
Weir blockage
Evidence of short circuiting
Excessive buildup of solids in center well of circular clarifier
Pin floc in overflow
Ineffective scum rake
Floating sludge on surface
Excessive high sludge blanket
Clogged sludge withdrawal ports on secondary clarifier.
21.
Yes No ( TA)
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yeg No N/A
YesN/A
Yes (LEI N/A
Yes C O N/A
Yes N/A
Yes CNo N/A
Yes No CLAD
(Yes' No N/A
Yes (No N/A
a.
b.
c.
d.
e.
f.
g•
h.
i.
J.
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:
a. Sludge buildup in contact chamber
b. Gas bubbles
c. Floating scum and/or solids
d. Adequate ventilation of chlorine feeding room and storage area
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.
Jut cut p i ()X c(.41 ;;i
5. r e_cl c: -pc? re/1-e ly

Yes No
Yes CN& N/A
(Yes ) No N/A
(Yeas No N/A
Yes (Nod N/A
Yes Q<i'o N/A
Yes No A
Yes (f N/A
Yes No (N/
Yes No N/A
Yes No N/A
Yes No LA'A'
'es No N/A
Yes CND N/A
Yes C No N/A
Yes & N/A
Yes No N/A
(Y s No N/A
Yes No
Yes No
Yes No
Yes No
N/A
N/A
N/A
N/A
Yes No <N/
Yes No N/A
Yes No N/A
Page 4
23. Ultraviolet radiation disinfection present and in use.
24. Dechlorination:
a. Proper storage of sulfur dioxide cylinders
b. Adequate ventilation of sulfur dioxide feeding room
c. Automatic sulfur dioxide feed or feedback control net operating
properly.
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 to front of plant
Approved disposal site for the sludge
Sludge land applied.
a.
b.
c.
d.
e.
f.
g•
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 ( Z N/A
Yes CZTa 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:
<Yers) No N/A a. Proper placement of flow measurement device
()No N/A b. Flow meter calibrated
Yes (gib N/A c. Buildup of solids in flume or weir
Yes CIS N/A .d. Broken or cracked flume or weir
No N/A e. Properly functioning magnetic flowmeter u i ra n,c-(o;; 4 e
o.) N/A f. Clogged or broken stilling wells
Yes (g& N/A g. Weir plate edge corroded or damaged
cYes )No N/A h. System capable of measuring maximum flow
Yes No N/A . i. Flow measurement error less than 10%.
32. Sampling:
( es)No . N/A a. Sampling and analysis completed on parameters specified by permit
'�es. No N/A b. Samples refrigerated during compositing
Yes ( ) N/A c. Composite sample temperatures maintained at 0 to 4 degrees Celsius
during sampling
K ) No N/A d. Contract laboratory used for sample analysis
Yes-CN'o) N/A e. Composite samples obtained are flow proportional. ,/ cf r c r) 0,o o i
es�No N/A
C_Yes % No N/A
YYes No N/A
Cres % No N/A
Cy�s) No N/A
�Y s' No , N/A
(Yes No N/A
;Yes No N/A
(Y4 No N/A
RECORDKEEPING AND REPORTING
1. Records and reports maintained as required by permit.
2. All required information available, complete, and current.
3. Records maintained for 3 years and all sludge records maintained for 5
years.
4. Analytical results consistent with data reported on DMRs.
5. Sampling and analyses data adequate and include:
a. Dates, times, and location of sampling
b. Name of individual performing sampling
c. Results of analyses and calibration
d. Dates of analyses
e. Name of person performing analyses.

Page 6
6. Monitoring records adequate and include:
.ei) No N/A a. Monitoring charts kept for 3 years
(Yew No N/A b. Flowmeter calibration records kept for 3 years.
Te) No N/A 7. Laboratory equipment calibration and maintenance records adequate.
�YJ No N/A 8. BOD incubator temperature maintained at 20 +/- 1 Degrees Celsius
and the temperature maintained in a log for every day of operation.
�es No N/A 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:
Yes No N/A a. 0 & M Manual
Yes No N/A b. "As -built" engineering drawings
Cr& No N/A c. Schedules and dates of equipment maintenance repairs
r�
Yes No �N/A-,, d. Equipment data cards.
Yes No (N/? 11. Permittee is meeting compliance schedule.
YeI) No N/A 12. DMRs complete and include all NPDES permit required parameters.
Yes) No N/A 13. ORC visitation logs available and current.
es) No N/A 14. ORC certified at a level equal to or greater than the classification of
the wastewater facility.
Yes (&1) N/A 15. Backup Operator certified at one level less than the classification of
the wastewater facility or greater.
No N/A
,Y s 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 000719
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: 000719 HSB
REPORT INSPECTION DMR RESPONSE RECEIVED
DATE STATUS STATUS DUE DATE DATE
000727
COMMENTS: