NC0021661_Inspection_20000410

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NORTH CAROLINA DEPARTMENT OF 164
ENVIRONMENT AND NATURAL RESOURCES
April 10, 2000
The Honorable Ann Slaughter
Mayor, City of Laurinburg
PO Box 249
Laurinburg, NC 28352
DIVISION OF WATER QUALITY
FAYETTEVILLE REGIONAL OFFICE
SUBJECT: Compliance Evaluation Inspection
Libby -Owens Ford
Wastewater Treatment Plant
NPDES Permit No. NC0021661
Scotland County
Dear Ms. Slaughter:
Enclosed is a copy of the Compliance Evaluation Inspection conducted
March 29, 2000
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 priority of all wastewater
treatment facilities should be complete compliance with the NPDES permit which
will ensure the best quality effluent discharged to our receiving streams.
Please review the attached report. If you or your staff have any questions
do not hesitate to contact me at 910-486-1541.
Sincerely,
„Id 46414-C-70
Belinda S. Henson
Environmental Chemist
/bsh
Enclosures
225 GREEN STREET, SUITE 714 / SYSTEL BLD. FAYETTEVILLE, NORTH CAROLINA 28301-5043
PHONE [phone] FAX [phone]
AN .EQUAL. OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% 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. NC0021661 Date: 000329 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: 9:55am Permit Effective Date: 991201
Exit Time/Date: 12:15pm/000329 Permit Expiration Date: 040831
Name(s), Title(s) of On -Site 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
Contacted: no
Section C: Areas Evaluated During Inspection
(S = Satisfactory, M = Marginal, U = Unsatisfactory, N = Not Evaluated, N/A = Not Applicable)
ermit:
Records/Reports. ;
+acility`Site
eview
flow;
easurerrien
Laboratory:':
Pretreatrie
rent/Recervrng':Waters
omphance Schedule
Self Monitoring -Program S
Sludge Disposal:,`
eration.& Maintenance
)they:

Section D: Summary of Findings/Comments:
1. This facility is operated by the City of Laurinburg.
2. A new OCM Milltronics flow meter was installed and calibrated by Jim Haven, Inc. October 26,
1999. The new flow meter has shown higher flows than past flow recordings. The previous method
for flow recording was estimations of water supply pumping rates and the amount of time the pumps
are operating.
3. 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 daily by a timer.
4. The clarifier appeared to have a small amount of fine pin floc floating on the surface of wastewater.
5. Chlorine is added to the effluent for disinfection. The chlorine contact tank appeared to be clean.
There appeared to be some leakage of effluent under the V-notch weir where the effluent flows.
The leaks should be repaired to ensure correct flow readings. All effluent sampling is done at this
location. A suggestion was discussed with Mr. Odum of obtaining wastewater approved chlorine
tablets to use as a backup disinfection system when chlorine failure occurs. This could prevent
NPDES permit violations.
6. The effluent appeared to be free of solids.
7. The effluent flows from the chlorine contact tank into a holding pond. The outfall from the holding
pond was accessible. The outfall effluent appeared to be clear in color.
8. The sludge holding area is filled approximately three (3) inches from the top of both tanks. As
previously mentioned in the last inspection report dated March 29, 1999 the sludge tanks
should be pumped out immediately and properly disposed of. Please respond to our office by
May 12, 2000 concerning sludge removal.
9. The NPDES permit was available upon request.
10. The NPDES permit required parameters are analyzed by the laboratory located at the Laurinburg
Leith Creek WWTP.
11. Laboratory records were reviewed for July through November 1999 and compared to Discharge
Monitoring Reports (DMRs). During the month of September 29 a Total Suspended Solids result
was incorrectly reported on the DMR and also on November 23. Please submit corrected DMRs for
the months of September and November 1999 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.
12. A compliance evaluation analysis report for the period February 1999 through January 2000 did not
reveal any monthly violations. There were not any NOVs sent from this office for the period stated.
13. As a reminder as per our Administrative Code Section: 15A NCAC 2B .0506(b)(3)(F)(i)-the date
on which collection of composite samples is commenced or data shall be entered onto the
monitoring report form on the date that has the greater number of hours in it. The following
examples will assist you in understanding the reporting date:
A. If the composite sample is started on Tuesday, March 7, 2000 at 9:OOAM and the sample
is withdrawn from the composite sampler on Wednesday, March 8, 2000 at 9:OOAM; the
day with the greater number of hours in it is Tuesday, March 7, 2000.
B. If the composite sample is started on Tuesday, March 7, 2000 at 6:OOPM and the sample is
withdrawn from the composite sampler on Wednesday, March 8, 2000 at 6:OOPM; the day
with the greater number of hours in it is Wednesday, March 8, 2000.
Name and Signature of Inspector Agency/Office/Telephone
Belinda S. Henson
Date
-. "' 'f DENR/Fayetteville/[phone] 1` ID 0
Name and Signature of Reviewer Agency/Office/Telephone Date
%'
Paul E. Rawls "1 DENR/Fayetteville/[phone]
//j�V t� �
71
Action Taken
Regulatory Office Use Only
Compliance Status
_Noncompliance
_Compliance
`tr 1.
Date

Section I): Summary of Findings/Comments
Brief Facility Description:
The City of Laurinburg continues to operate an existing 0 030 MGD wastewater treatment
facility located at the Libbey Owens Ford location with the following components: extended
aeration, clarifier, post chlorination and aerobic sludge digesters.
FACILITY SITE REVIEW
No N/A 1. Treatment units properly operated and maintained.-,
Yes 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 Co vyt yvi e
Yes No N/A a. Disposal of sludge according to regulations
Yes No N/A b. State approval for sludge disposal received.
4 - No N/A 5. All treatment units other than backup units in service.
Yes No N/A 6. Sufficient sludge disposed of to maintain treatment process equilibrium. 5 e.�
C.o rime of % i
C )No N/A 7. Adequate number of qualified operators on staff.
tl' No N/A 8. Established procedures available for training new employees.
CtiD No N/A 9. Adequate spare parts and supplies inventory maintained.
Yes No (VD 10. a. Hydraulic overflows and/or organic overloads experienced
Yes No VitV b. Untreated bypass discharge occurs during power failure
Yes No CODIP c. Untreated overflows occurred since last inspection.
No N/A 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.

Page 2
Yes No ( /A.
Yes No N/A
Yes No N/A
Yes No N/A
13. Screening:
a. Manual
b. Mechanical
c. Buildup of debris
d. Screenings properly disposed of.
14. Grit Removal:
Yes No [WA) a. Excessive organic content in the grit chamber
Yes No N/A b. Excessive odors
Yes No N/A c. Grit properly disposed of.
15. Primary clarifier:
Yes No N/A 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)
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 N/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 N/A
Yes No
Yes Na N/A
Yes �g1 N/A
Yes N/A
Yes Ca N/A
Yes 0 N/A
Yes No
Yes No N/A
Yes No N/A
Yes No N/A
Yes N/A
Yes CON/A
Yes 4S0 N/A
Yes N/A
Yes .No.(ET23)
(Yew No N/A
Yes No �/.A�
Yes CIO N/A
Yes No N/A
Yes ) N/A
Yes
Yes
Yes
Yes
Yes
Yes
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 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 nute x e z ss J L
Ineffective scum rake
Floating sludge on surface
Excessive high sludge blanket
Clogged sludge withdrawal ports
21.
No iA
No N/A
No N/A
No N/A
No N/A
No N/A
22.
Yes SO N/A
Yes Ned N/A
Yes N/A
'Yes NNd N/A
Yes Now/ .)
Te No N/A
VP No N/A
Yes Ian N/A
a.
b.
c.
d.
e.
f.
g•
h.
i.
J.
on secondary clarifier.
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.
Chlorination Unit:
a. Sludge buildup in contact chamber
b. Gas bubbles
c. Floating scum and/or solids
d. Inadequate 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. Improper chlorine feed, storage, and reserve supply.

Yes No N/A) 23. Ultraviolet radiation disinfection present and in use.
Yes No
Yes No N/A
Yes No N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Page 4
24. Dechlorination:
a. Improper storage of sulfur dioxide cylinders
b. Inadequate ventilation of sulfur dioxide feeding room
c. Automatic sulfur dioxide feed or feedback control not operating
properly.
25.
No CN%A)
No N/A
No N/A
No N/A
26.
No N%A
No N/A
No N/A
27.
Yes No (N
Yes No CNIA)
Yes No
Yes No CN1A�
Yes No N W
s: No N/A
Yes No N/A
28.
Yes No /A)
Yes No N/A.
Yes No N/A
Yes No N/A
Yes N/A
Yes N/A
Yes Ego) N/A
Aerobic Digester:
a. Excessive foaming in tank
b.. Noxious odor
c. Mechanical aeration failure
d. Clogging of diffusers.
Anaerobic Digester:
a. Floating cover tilting
b. Gas burner inoperative
c. Supernatant has a sour odor.
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.
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 «d N/A
Yes ( N/A
Yes No N/A
Yes �bJ N/A
Yes H N/A
Yes Coy N/A
Q► No N/A
Yes (a: N/A
Yes , NoA�
Yes N/A
Yes T N/A
Yes No N/A
—No N/A
Yes No N/A
')No N/A
Yes CD 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:
Improper placement of flow measurement device
Flow totalizer not calibrated
Buildup of solids in flume or weir
Broken or cracked flume or. weir Sf e C-O Vv1 r i 61 # 6-
Improperly functioning magnetic flowmeter
Clogged or broken stilling wells
Weir plate edge corroded or damaged
System not capable of measuring maximum flow
Flow measurement error greater than +/- 10%.
a.
b.
c.
d.
e.
f.
g•
h.
i.
32. Sampling:
a. Sampling and analysis completed on parameters specified by permit
b. Samples refrigerated during compositing ITC
c. Composite sample temperatures maintained at less than or equal to 4
degrees Celsius during sampling
d. Contract laboratory used for sample analysis.
No N/A
No N/A
No N/A
No N/A
des? No N/A
M s? No N/A
es,' No N/A
es� No N/A
esj No N/A
1.
2.
RECORDKEEPING AND REPORTING
Records and reports maintained as required by permit.
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 / i)
Yes No a�
CreVNo N/A
Yes M N/A
Yes N/A
Yes ( 'off N/A
Yes lG) N/A
Yes No j )
(Yeses No N/A
Les )No N/A
es to N/A
No N/A
ga No N/A
Revised 10/1/99
by Belinda Henson
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 maintenancerecords adequate.
8. 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.
9. Permittee is meeting compliance schedule.
10. DMRs complete and include all NPDES permit required parameters.
11. ORC visitation logs available and current.
12. ORC certified at a level equal to or greater than the classification of
the wastewater facility.
13. Current copy of the complete NPDES permit on site.
14. Facility description verified as contained in NPDES permit.

INSPECTION REPORT
UPDATE OPTION: TRX: 5IF KEY: NC0021661INSCEI 000329
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: 000329 HSB
REPORT INSPECTION DMR RESPONSE RECEIVED
DATE STATUS STATUS DUE DATE DATE
000410 C - C
COMMENTS:

Belinda S. Hinson
NCDENR
225 Green Street
Suite 714/Systel Bld.
Fayetteville,NC 28301-5043
Subject:Compliance Evaluation Response
Libby -Owens Ford
Wastewater Treatment Plant
NPDES Permit No. NC0021661
Scotland County
4 Y 5 2000
Dear Belinda S. Hinson: April 27, 2000
Enclosed you will find two (2) copies of the corrected DMRs for the month of
September 29, 1999 and November 23, 1999. The error was a simple transcription error;
all operators have been informed to be more careful when transferring data from bench
sheets to DMRs. The Bio-solids at this facility were rem from the sludge hol_, dingy
ar n April 27, 2000. They were added to the City of Laurinburg's 650,000 gallon
digester at the Leith Creek Wastewater Plant.
If you have any questions please contact me at 910-276-3522.
Sincerely,
Ricky Odom
Lab Tech/Operator II
C�
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