NC0021661_Inspection_20010621

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
The Honorable Ann Slaughter
Mayor, City of Laurinburg
PO Box 249
Laurinburg, NC 28352
June 21, 2001
SUBJECT: Compliance Evaluation Inspection
Libby -Owens Ford
Wastewater Treatment Plant
NPDES Permit No. NC0021661
Scotland County
Dear Ms. Slaughter:
4/21/r4
NCDENR
Enclosed is a copy of the Compliance Evaluation Inspection conducted June 15, 2001..
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. Ricky Odum, Grade III ORC, was appreciated. 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,
Belinda S. Henson
Environmental Chemist
BSH/bsh
Enclosures
225 GREEN STREET - SUITE 714 / SYSTEL BUILDING / FAYETTEVILLE, NC 28301-5043 •
PHONE [phone] FAX [phone] WWW.ENR.STATE.NC.US/ENR/
AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% POST CONSUMER PAPER
DENR TOLL FREE HOTLINE: [phone]

NPDES COMPLIANCE INSPECTION REPORT
North Carolina Division of Water Quality
Fayetteville Regional Office
Section A. National Data System Coding
Transaction Code: N NPDES NO. NC0021661 .Date: 010615 Inspection Type: C
Inspector: S Facility Type: 2 Reserved:
Facility Evaluation Rating: 4 BI: N QA: N Reserved:
Section B: Facility Data
Name and Location of Facility Inspected:
Libby Owens Ford WWTP
Entry Time: 12:20am Permit Effective Date: 991201
Exit Time/Date: 2:30pm/010615 Permit Expiration Date: 040831
Name(s), Title(s) of OnSite Representative(s):
Ricky Odum-(Certified Grade III)-"ORC"
Phone Number(s): [phone]
Name, Title and Address of Responsible Official
Ms. Ann Slaughter, Mayor
PO Box 249
Laurinburg, NC 28352
Section C: Areas Evaluated During Inspection
Contacted: no
(S = Satisfactory, M = Marginal, U = Unsatisfactory, N = Not Evaluated, N/A = Not Applicable)
IZecot cfs/;Reports
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Operation. & Maintenance: • S:

Slaughter
Page 3
June 21, 2001
Section D: Summary of Findings/Comments:
1. The facility is 100% domestic wastewater. The source of wastewater is from the industry (LOF). The
City of Laurinburg operates this facility.
2. Influent flow travels through the aeration basins in a series. Diffused aeration is used in the treatment
of the wastewater. Two (2) blowers are used as the aeration source. The blowers are rotated
automatically by a timer. The surface of the blowers appeared to have paint worn from them. Painting
of these areas in the near future could eliminate major repairs in the future. A recommendation
is for the facility staff to obtain Mixed Liquor Suspended Solids (MLSS) results monthly or more
frequently to assist with operation.
3. The clarifier appeared to be operating adequately.
Chlorine gas is added to the effluent for disinfection. The chlorine contact tank appeared to be clean.
As per Mr. Odum, the LOF staffhad repaired the weir leakage that was noted in the last inspection dated
March 29, 2000. There appeared to be a small amount of leakage (not excessive). Continued repairs
can eliminate the leakage totally. Please respond within 30 days of receipt of this report when weir
leakage is eliminated.
5. The effluent appeared to be free of solids.
6. The effluent flows from the chlorine contact tank into the ten (10) acre holding pond located on site.
From the holding pond, the effluent is discharged to an unnamed tributary to Shoe Heel Creek.
The sludge digester had been cleaned since the last inspection dated March 29, 2000 and there appeared
to be enough space for continued wasting of sludge. Cooper Septage hauler pumped solids from the
digester and disposed of them through the -City of Laurinburg's wastewater treatment plant.
8. Sand had been placed in areas around the concrete surfaces of the plant to assist with stability since the
last inspection dated March 29, 2000. The facility staff should be commended for the
improvements noted.
9. The effluent flow meter was calibrated August 2000 by "Jim Haven Company". The flow meter
calibration document should contain the % error before and after calibration. Future calibrations by the
technician should have these percentages.
10. The NPDES permit required parameters are analyzed by the certified municipal laboratory located at
the Laurinburg Leith Creek WWTP.
11. A compliance evaluation analysis report for the period May 2000 through April 2001 did not reveal any
monthly violations. There were not any NOVs sent from this office for this period.

Slaughter
Page 4
June 21, 2001
12. Laboratory records were reviewed for the period June through November 2000 and compared to
Discharge Monitoring Reports (DMRs). As a reminder all laboratory data reported on the DMRs should
be incorporated onto laboratory bench sheets. During the month of September 6 an Ammonia result
was incorrectly reported on the DMR A value of 4.79 mg/1 of Ammonia was reported on the DMR and
the laboratoryrecords showed the value to be 4.75 mg/1. Please submit corrected DMRs for the month
of September 2000 within thirty (30) days of receiving this report. 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 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 back side of the Effluent
page or in a cover letter accompanying the reports.
Name and Signature of Inspector
Belin a S. Henson
��ndOO J
Name and Signature of Reviewer
Grady Dobson
.1.:_.
Action Taken
Agency/Office/Telephone Date
DENR/Fayetteville/[phone] % _ _p '
Agency/Office/Telephone Date
DENR/Fayetteville/[phone]
Regulatory Office Use Only
Compliance Status
Noncompliance
_Compliance
Date

Section D: Summary of Findings/Comments
Brief Facility Description:
A 0.030 MGD WWTP consisting of grit removal, extended aeration_ clarifier_ post chlorination
and aerobic sludge digestors.
FACILITY SITE REVIEW
es No N/A 1. Treatment units properly operated and maintained.
Yes No N/A 2. Standby power or other equivalent provision provided.
Yes No N/A 3. Adequate alarm system for power or equipment failure available.
4. Sludge disposal procedures appropriate:
e' No N/A a. Disposal of sludge according to regulations
(7e) No N/A b. State approval for sludge disposal received.
No N/A 5. All treatment units other than backup units in service.
`1 `J No N/A 6. Sufficient sludge disposed of to maintain treatment process equilibrium.
es No N/A 7. Adequate number of qualified operators on staff
Te No N/A 8. Established procedures available for training new employees.
Yes No N/A 9. Adequate spare parts and supplies inventory maintained.
Yes No 10. a. Hydraulic overflows and/or organic overloads experienced
Yes No N/A b. Untreated bypass discharge occurs during power failure
Yes No �N/ c. Untreated overflows occurred since last inspection.
6(es)No N/A 11. Plant has general safety structures such as rails around or covers over
tanks, pits, or wells.
(el) No N/A 12. Plant is generally clean, free from open trash areas.

Yes
Yes
Yes
No
No
No
No
N/A
N/A
N/A
N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Noc
No
No
No
No
No
No
No
No
No
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
No NI
No N/A
No N/A
No N/A
No N/A
No N/A
No N/A
No N/A
Yes NoLA
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:
Trickling filter ponding(indicating clogged media)
Leak at center column of trickling filter's distribution arms
Uneven distribution of flow on trickling filter surface
Uneven or discolored growth
Excessive sloughing of growth
Odor
Clogging of trickling filter's distribution arm orifices
Filter flies, worms, or snails.
a.
b.
c.
d.
e.
f.
g.
h.
17. Rotating Biological Contactors (RBC):
a. Development of white biomass on rotating biological contactor
media
b. Excessive sloughing of growth
c. Excessive breakage of rotating disks or shafts in RBC units
d. Excessive breakage of paddles on brush aerators
e. Shaft, bearing, drive gear, or motor failure on disk or brush aerators.

18. Activated Sludge Basins/Oxidation Ditches:
Yes No N/A a.. Dead spots
Yes No /A b. Failure of surface aerators
Yes N/A c. Air rising in clumps
Yes of N/A d. Dark foam or bad color
Yes o N/A e. Thick billows of white, sudsy foam
Yes N/A f. Air rising unevenly
Yes (No N/A g. Excessive air leaks in compressed air piping.
Yes No
Yes No N/A
Yes No N/A
Yes No N/A
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:
Yes N/A a. Excessive gas bubbles on surface
Yes N/A b. Unlevel overflow weirs
Yes J7 N/A c. Weir blockage
Yes o N/A d. Evidence of short circuiting
Yes oy N/A e. Excessive buildup of solids in center well of circular clarifier
No N/A £ Pin floc in overflow So ale nvt. `�-Xccss , ie.
Yes No (Trip g. Ineffective scum rake
Yes Nj N/A h. Floating sludge on surface
Yes ei., N/A i. Excessive high sludge blanket
Yes No N/A j. Clogged sludge withdrawal ports on secondary clarifier.
21. Filtration:
Yes No N/A a. Filter surface clogging
Yes No N/A b. Short filter run
Yes No N/A c. Gravel displacement of filter media
Yes No N/A d. Loss of filter media during backwashing
Yes No N/A e. Recycled filter backwash water in excess of 5 percent
Yes No N/A f. Formation of mudballs in filter media.
22. Chlorination Unit:
Yes N/A a. Sludge buildup in contact chamber
Yes N/A b. Gas bubbles
Yes 1 N/A c. Floating scum and/or solids
Yes O N/A d. Adequate ventilation of chlorine feeding room and storage area
Yes No N/A e. NIOSH-approved 30 minute air pack
es� No N/A f. All standing chlorine cylinders chained in place
(Y0 No N/A g. All personnel trained in the use of chlorine
�es No N/A h. Proper chlorine feed, storage, and reserve supply.

Yes No N/23. Ultraviolet radiation disinfection present and in use.
Yes No VA)
Yes No N/A
Yes No N/A
Yes No N/A
Yes. a, N/A
Yes No cN
Yes No N/A
Yes No
Yes No N/A
Yes No N/A
Yes No
Yes No
Yes No
Yes No
Yes No
No N/A
Yes No N/A
Yes
Yes
Yes
Yes
No(W!
No N/A
No N/A
No N/A
Yes No
Yes No :N/A
Yes No N/A
Page 4
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 not 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:
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
f. Approved disposal site for the sludge
g. Sludge land applied. 'F c ter; LA,'" -fir; F.h C ( e
K -c<ic ; i t: j
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
Solids or scum accumulations in tank or at side of pond
Evidence of bypassed polishing ponds or tanks because of low
capacity.
b.

Yes N/A
Yes N/A
Yes ( N/A
Yes N/A
Yes No N/A
es No N/A
Ye No N/A
Yes N) N/A
Yes Co N/A
Yes No Oa
Yes No
Yes c N/A
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:
es No N/A a. Sampling and analysis completed on parameters specified by permit
Yes No N/A b. Samples refrigerated during compositing •.Tce,c
Yes No N/A c. Composite sample temperatures maintained at 0 to 4 degrees Celsius
during sampling
d. Contract laboratory used for sample analysis
e. Composite samples obtained are flow proportional.
No N/A
Ye r No N/A
Ye)No N/A
Yes No N/A
(Yew No N/A
es, No N/A`
egmNo N/A
Yee No N/A
fey` 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.

Yes No N/A
Yes No N/A
6. Monitoring records adequate and include:
a: Monitoring charts kept for 3 years
b. Flowmeter calibration records kept for 3 years.
'Page 6
N/A 7. Laboratory equipment calibration and maintenance records adequate.
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes 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.
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.
Yes No 11. Permittee is meeting compliance schedule.
Yet No N/A 12. DMRs complete and include all NPDES permit required parameters.
Yes No N/A 13. ORC visitation logs available and current.
01e0No N/A 14. ORC certified at a level equal to or greater than the classification of
the wastewater facility.
Yes o N/A 15. Backup Operator certified at one level less than the classification of
the wastewater facility or greater.
Yes No N/A 16. Current copy of the complete NPDES permit on site.
Yesp o N/A 17. Facility description verified as contained in NPDES permit.
Revised 7/11/00
by Belinda Henson

INSPECTION REPORT
UPDATE OPTION: TRX: 5IF KEY: NC0021661INSCEI 010615
SYSMSG: *** DATA ADDED SUCCESSFULLY ***
PERMIT--- NC0021661 REG/COUNTY-- 06 SCOTLAND
FACILITY-- LAURINBURG, CITY / L-O-F WWTP" LOC-- LAURINBURG
INS TYPE
CEI
NEXT PLANNED
9806
INSPECTION INSPECTED BY:
DATE:'• 010615 HSB
•.REPORT INSPECTION DMR RESPONSE RECEIVED
DATE STATUS STATUS DUE DATE DATE
010621 C C
COMMENTS:
RESPONSE DUE WITHIN 30 DAYS OF RECEIPT.