NC0028916_Inspection_20000328

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NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
March 28, 2000
The Honorable Roy Maness
Mayor, Town of Troy
444 N. Main Street
Troy, NC 27371
DIVISION OF WATER QUALITY.
FAYETTEVILLE REGIONAL OFFICE
SUBJECT:. Compliance Evaluation Inspection
Town of Troy
Wastewater Treatment Plant
NPDES Permit No. NC0028916
Montgomery County
Dear Mr. Maness:
Enclosed is a copy of the Compliance Evaluation Inspection conducted
March 23, 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,
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. NC0028916 Date: 000323 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:
Town of Troy WWTP
Entry Time: 10: l5am Permit Effective Date: 981102
Exit Time/Date: 2:35pm/000323 Permit Expiration Date: 990630
Name(s), Title(s) of On -Site Representative(s):
Stephen Jarman (Certified Grade III Operator) - "ORC"
Gray Walls - "Public Works Director/Town Engineer"
Phone Number(s): [phone]
Name, Title and Address of Responsible Official
Mr. Roy Maness, Mayor
444 N. Main Street
Troy, NC 27371
Contacted: no
Section C: Areas Evaluated During Inspection
(S = Satisfactory, M = Marginal, U = Unsatisfactory, N = Not Evaluated, N/A = Not Applicable)
Permit: S:"
"Records/Reports IS
Facility Site Review: S
„;F1ow:Measuremente S.
Laboratory:'S
-Effluent/Receiving Waters: S
.Pretreatment:: N/E:`.,•
Compliance; Schedule N/A
Self -Monitoring. Program: S
Operation & Maintenance:
Sludge Disposal:. S
Other:

Section D: Summary of Findings/Comments:
1. This facility is operated by the contract company, "Water Technology and Controls" for the Town.
A manual bar screen and a rotameter are used to remove trash and debris at the headworks of the
plant. The rotameter is basically a second screen which dewaters the trash and transports it to a
chute which is directed intoa dumpster. All screenings are disposed of through the Uwharrie
Environmental Landfill.
3. The grit removal system appeared to be operating. All grit is disposed of in the Uwharrie
Environmental Landfill.
4. Caustic is added to the influent when pH adjustment is needed.
5. The oxidation ditches appeared to be operating efficiently. In the first series of the ditches there was
some vegetative growth in a small area. This growth should be removed to assist in adequate
treatment of the wastewater.
6. The clarifiers' sludge depth was approximately two (2) feet with a tank depth of ten (10) feet.
7. Chlorine is used in disinfection of the effluent. The chlorine contact tank appeared to have a few
floatables not excessive. The floatables are skimmed away daily and properly disposed of.
8. The effluent appeared to be free of solids.
9. The sludge holding tank appeared to be approximately 2/3 full with extra space beyond that with
supernatant on top.
10. The sludge digester appeared to be operating efficiently. Sludge disposal is by land application. The
sludge disposal is completed by "Synagro Company" every 18 months.
11. Two lagoons are located on site. The largest lagoon is used as a equalizing lagoon for high flow
periods. The smaller lagoon is no longer used. There was very little water in this lagoon. Plans are
to clean the sludge from this lagoon and land apply it.
12. The grounds were neat and clean.
13. A new effluent flow meter was recently installed by facility staff. The flow meter installed was a
OCM II Milltronics. The installation and calibration of the flow meter was January 20, 2000. It is
advisable that the flow meter calibration document contain the % error before and after calibration
in the future by the technician.
14. The refrigerated composite samplers contained thermometers to monitor temperature. The
temperatures were within the proper protocol of 4 Degrees Celsius or less for sample temperature.
The effluent sampler tubing appeared to have some buildup of solid material in it which could
contribute to higher results than what is actually discharged to the receiving stream.
15. The following NPDES permit required parameters are analyzed by facility staff: pH, Temperature,
Dissolved Oxygen, and Chlorine Residual. All other required parameters are analyzed by "Water
Technology and Controls".

-continued-
16. Laboratory records were reviewed for the period April through June 1999 and compared to
Discharge Monitoring Reports (DMR). All records reviewed appeared to be accurate.
17. A compliance evaluation analysis report for the period February through December 1999 revealed
a monthly violation in December for Ammonia. A Notice of Violation (NOV) was sent to the
permittee for the following: June 1999 - cyanide (weekly average).
18. The NPDES permit was available upon request. The present permit has expired June 30, 1999. A
new permit will be issued soon from the NCDENR/DWQ Permitting section in Raleigh.
19. 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
lnspector)) Agency/Office/Telephone Date
Belinda S. Henson 3C & � riDENR/Fayetteville/[phone] ` 0
Name and Signature of Reviewer
Agency/Office/Telephone Date
Paul DENR/Fayetteville/[phone]
Action Taken
Regulatory Office Use Only
Compliance Status
_Noncompliance
_Compliance
3 -- 2 ,7:2` °`
Date

Section D: Summary of Findings/Comments.
Brief Facility Description:
Town of Troy operates a 0.84 MCTD WWTP consisting of a manual bar screen, rotameter, grit
removal system, oxidation ditches, secondary clarifiers, chlorination, recording effluent flow
meter, sludge holding tank, sludge digester, and flow equalization lagoon.
FACILITY SITE REVIEW
'e) No N/A 1. Treatment units properly operated and maintained.
Yes GD N/A 2. Standby power or other equivalent provision provided.
No N/A 3. Adequate alarm system for power or equipment failure available.
No N/A
c No N/A
OPP
4. Sludge disposal procedures appropriate:
a. Disposal of sludge according to regulations
b. State approval for sludge disposal received.
(Yew No N/A 5. All treatment units other than backup units in service.
GLED No N/A 6. Sufficient sludge disposed of to maintain treatment process equilibrium.
No N/A 7. Adequate number of qualified operators on staff.
No N/A 8. Established procedures available for training new employees.
No N/A 9. Adequate spare parts and supplies inventory maintained.
Yes 66`, N/A 10. a. Hydraulic overflows and/or organic overloads experienced
Yes j N/A b. Untreated bypass discharge occurs during power failure
Yes G j N/A 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.

SeD No N/A
T No N/A
Yes N/A
es No N/A
Yes N/A
Yes We N/A
CYes' No N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No CN7A.,
No N/A
No
No
No
No
No
No
No
No
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes No (Sri
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
Yes No N/
Yes
Yes
Yes
Yes
No N/A
No N/A
No N/A
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
£ 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 RBC 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 NB N/A
Yes No C T/3
Yes cNo& N/A
Yes (07 N/A
Yes (N-Z) N/A
Yes No (KI/A)
Yes No (S1T$?
Yes d N/A
Yes N/A
Yes N N/A
Yes g 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: g LACt La �'8.t--Rco? ovn
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 (Ng N/A b. Unlevel overflow weirs
Yes (No,) N/A c. Weir blockage
Yes o) N/A d. Evidence of short circuiting
Yes (No N/A e. Excessive buildup of solids in center well of circular clarifier
Yes CNa7 N/A f. Pin floc in overflow
Yes No N/A g. Ineffective scum rake
Yes Tf' N/A h. Floating sludge on surface
Yes gc2D N/A I. Excessive high sludge blanket
Yes gb) 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 filterbackwash water in excess of 5 percent
Yes No N/A f. Formation of mudballs in filter media.
22. Chlorination Unit:
Yes No N/A a. Sludge buildup in contact chamber
Yes (a N/A b. Gas bubbles
Yes Qg.d N/A c. Floating scum and/or solids
Yes N/A d. Inadequate ventilation of chlorine feeding room and storage area
Yes No N/A e. NIOSH-approved 30 minute air pack
`Yew% No N/A f. All standing chlorine cylinders chained in place
es No N/A g. All personnel trained in the use of chlorine
Yes (moo) N/A h. Improper chlorine feed, storage, and reserve supply.

Page 4
Yes No 23. Ultraviolet radiation disinfection present and in use.
24. Dechlorination:
Yes Noj�N%A a. Improper storage of sulfur dioxide cylinders
Yes No N/A b. Inadequate ventilation of sulfur dioxide feeding room
Yes No N/A c. Automatic sulfur dioxide feed or feedback control not operating
properly.
25. Aerobic Digester:
Yes No N/A a. Excessive foaming in tank
Yes ED N/A b. Noxious odor
Yes No /-` c. Mechanical aeration failure
Yes No N/A d. Clogging of diffusers.
26. Anaerobic Digester:
Yes No NI a. Floating cover tilting
Yes No N/A b. Gas burner inoperative
Yes No N/A ' c. Supernatant has a sour odor.
27. Sludge Drying and/or disposal:
Yes No N/A a. Poor sludge distribution on drying beds
Yes No N/A b. Vegetation in drying beds
Yes No N/A c. Dry sludge remaining in drying beds
Yes No N/A d. Dry sludge stored on site
Yes No N/A e. Filtrate from sludge drying beds returned to front of plant
No N/A f. Approved disposal site for the sludge
No N/A g. Sludge land applied.
Yes No CND
Yes No N/A
Yes No N/A
Yes No N/A
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:
Yes No CN/3 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 (Noo N/A
Yes No N/A
No N/A
Yes 0)N/A
Yes c1o) N/A
Yes No>N/A
Yes N/A
Yes cgoD N/A
Yes No �T)
Yes N/A
YesCoN/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. Improper placement of flow measurement device
b. Flow totalizer not calibrated
c. Buildup of solids in flume or weir
d. Broken or cracked flume or weir
e. Improperly functioning magnetic flowmeter
f. ' Clogged or broken stilling wells
g. Weir plate edge corroded or damaged
h. System not capable of measuring maximum flow
I. Flow measurement error greater than +/- 10%.
32. Sampling:
es�To N/A a. Sampling and analysis completed on parameters specified by permit
re No N/A b. Samples refrigerated during compositing
(,Yes` No N/A c. Composite sample temperatures maintained at less than or equal to 4
degrees Celsius during sampling
(Yes') No N/A d. Contract laboratory used for sample analysis.
No N/A
es No N/A
es No N/A
es` No N/A
No N/A
es No N/A
es No N/A
(YeiiNo N/A
LYNo 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:
Yes No N/A a. Monitoring charts kept for 3 years
Yes No N/A b. Flowmeter calibration records kept for 3 years.
(Yes) No N/A 7. Laboratory equipment calibration and maintenance records adequate.
8. Plant records adequate and include:
No N/A a. 0 & M Manual
No N/A b. "As -built" engineering drawings
Yes N/A c. Schedules and dates of equipment maintenance repairs
Yes No d. Equipment data cards. `
Yes No 9. Permittee is meeting compliance schedule.
Yes No N/A 10. DMRs complete and include all NPDES permit required parameters.
Yes )No N/A 11. ORC visitation to s available and current.
3 -
es No N/A 12. ORC certified at ; level equal to or greater than the classification of
the wastewater faility.
Yes o N/A
13. Current copy of the complete NPDES permit on site.
Yes 'iNo N/A 14. Facility description verified as contained in NPDES permit.
Revised 10/1/99
by Belinda Henson

• INSPECTION REPORT
UPDATE OPTION: TRX: 5IF KEY: NC0028916INSCEI 000323
SYSMSG: *** DATA ADDED SUCCESSFULLY ***
PERMIT--- NC0028916
REG/COUNTY-- 06 MONTGOMERY
FACILITY-- TROY, TOWN - WWTP LOC-- TROY
INS TYPE
CEI
NEXT PLANNED
INSPECTION INSPECTED BY:
DATE: 000323 HSB
REPORT INSPECTION DMR RESPONSE RECEIVED
DATE STATUS STATUS DUE DATE DATE
000328 C C
COMMENTS: