NC0020605_Compliance Evaluation Inspection_20200106

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
NORTH CAROLINA
Environmental Quality
January 6, 2019
Troy R. Lewis, Town Manager
Town of Tarboro
P.O. Box 220
Tarboro, NC 27886
Subject: Compliance Evaluation Inspection
Tarboro WWTP
NPDES Permit No. NCO020605
Edgecombe County
Dear Mr. Allen:
a
*>
DWR Staff Jason Robinson and Josh Brigham of the Raleigh Regional Office conducted the subject
inspection on December 5, 2019. Staffs' assistance with this inspection was appreciated. Below is a list
of findings developed from the inspection and review of the permit:
1. The most recent permit became effective March 1, 2016 and expired on September 30, 2019.
The Town'submitted a renewal application on May 22, 2019. A draft permit was issued on
October 30, 2019.
2. The plant is permitted for 5.0 MGD and is classified as a WW-4 wastewater facility. Mr. Mike
Allen is designated as the primary Operator in Responsible Charge (ORC) and is a WW-4. Mr.
Kevin Peaden (WW-4) is the designated backup operator (bORC). Daily operation log books
were available for review.
3. The following is a list of units, with comments:
a. Influent pump station
b. Automatic & manual bar screen & grit removal — This unit is rusty and should be
repaired/replaced in the future.
c. Three primary clarifiers
d. Two trickling filters — Only one in use
e. Four secondary clarifiers — Covered weirs are cleaned annually, sludge blanket kept at
2-3 feet.
f. Chlorine gas disinfection, chlorine contact tank; liquid dechlorination (sulfite);
g. Cascade aeration into Tar River — Effluent appeared clear with no foaming
h. Two aeration basins — older has mechanical air, newer has diffused air
L Sludge drying beds - Not in use
j. Two anaerobic digesters;
k. Three aerobic digesters
Division of Water Resources, Raleigh Regional Office, Water Quality Operations Section www.ncwaterquality.org
1628 Mail Service Center, Raleigh, NC 27699-1628 Phone: [phone]
Location: 3800 Barrett Drive, Raleigh, NC 27609 Fax: [phone]

I. Aerated sludge holding lagoon — Recently installed BlueFrog aerators
m. Sludge truck loading station — Sludge is applied to field beside treatment plan and by
Granville Farms under Land Application Permit WQ0002047
n. On -site generator —Tested weekly
4. The laboratory was checked in a cursory manner. All instruments, meters, probes, photometric
cells are maintained in good condition. Temperatures on all equipment are checked against an
NIST thermometer. The influent sampler box was 4.5 degrees C and the effluent sampler box
was 5 degrees C. The sample fridge was approximately 2.4 degrees C. The fecal coliform bath
was 44.5 degrees C and the BOD incubator was 20.0 degrees C. All standards, reagents and
consumables used are within expiration dates. Instruments are calibrated daily. A calibration
log for all meters is kept up to date. Flow meters are calibrated once a quarter.
5. Commercial lab results, chain of custody records, and bench sheets were compared with data
submitted on the DMR for June and March 2019. No discrepancies were noted. Tarboro
WWTP laboratory analyzes fecal coliform, pH, total suspended solids, dissolved oxygen,
ammonia, TRC, BOD, COD, and settleable solids. Environment One analyses TP, TKN, NO2-N +
NO3-N, and metals. Pace Analytical analyzes toxicity and the annual pollutant scan.
I want to thank you again for your assistance with this inspection. If you have any questions about this
letter or the inspection, please contact Jason Robinson at [e-mail].
Sincerely,
Scott Vinson, Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ
ATTACHMENTS
• Schematic of the Facility (Provided by Tarboro)
• Compliance Inspection Report
Cc: Central Files w/attachments
Raleigh Regional Office and Laserfiche
Michael Allen, WWTP Supervisor/ORC: [e-mail]
2 of 3

Fawn of Tarboro Wastewater Treatment Plant
P•ocess F c v Diagr3m
Headwrrks
-4v OP"' Primary CtarlSers
I
r-iaerobic D1 es!ers
g . , P` ircr ing Nle-s
< ti J
le aS.f-e!5
S ulge Dr}ing Eecs x
D.: rfe[' @l r`dsl:dCe
IN
Act..afed Mudge �
Aerdl.cn $a'i -s
Awo
' AErab c (31geslers
t k '
G >.
Aeraled Sludge Holding _agoon
" i-.:,+"
(Included in Tarboro's permit renewal package)
3of3

United Stales Environmental Protection Agency
Form Approved
EPA Washington. O C. 20460
OMB No. 2040-0057
Water Compliance Inspection Report
Approval expires 8-31 98
Section A: National Data System Coding (i e., PCS)
Transaction Code NPDES yr;moaday I:-5pection Type Inspector Fac Type
1 1„ I 2 15 I 3 1 NCO020605 111 121 19r 12r05 17 18 ICI 19 I G I 20 Lj
Lam! !-!
21 s
LLI
Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 CA - - - Reserved —
67 70 u r I 71 1 j72 (�, ( 73 I i E74 751 I I I I I I ISO
I t L LJ
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW. a'so inc:uclo
Entry TimelDale
Permit Effective Date
POTW name and NPDES Dermit Number)
10:OOAM 19/12/05
16/03/01
Tarboro WWTP
Exit TimefDale
Perm t Expiration Date
US Hwy 64 Bypass
Tarboro NC 27886
12 30PM 19/12/05
19/09/30
Name(s) of Onsite Representative(s)lTitles(s)lPhone and Fax Number(s)
Other Facility Data
It/
Name, Address of Responsible OfficiallTille/Phone and Fax Number
Michael AIlen,PO Box 224 Tarboro NC 27866022011252-641-4251r2526414230 Contacted
No
Section C: Areas Evaluated During inspection (Check only those areas evaluated)
S Permit E Flow Measurement Operations & Maintenance N Records/Reports
Effluent/Receiving Waters N Laboralory
Section D: Summary of Finding/Comments (Attach additiona' sheets of narral ve and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of IInsspeclor(s))- Agency:OffcelPhone and Fax Numbers Date
Jason 1�v4.F— (1 &17— DWRIRRO
T Robinson / WOV9 1 9-791-42=
Joshua S Brigham DWRIRRO WQ,919-7914200r
Signature of Maria ement Q A Reviewer Agency:Office; Phcne and Fax Numbers Date
EPA Form 3560.3 (Rev 9-94) Previous editions are obsolete
Page#

NPDES yr/molday Inspection Type (Cont.) 1
31 NCO020605 I11 12I 19/121051 17 18 1 l
Section D: Summary of Finding/Commenis (Attach additional sheets of narrative and checklists as necessary)
1. The most recent permit became effective March 1, 2016 and expired on September 30, 2019. The
Town submitted a renewal application on May 22, 2019. A draft permit was issued on October 30,
2019.
2. The plant is permitted for 5.0 MGD and is classified as a WW4 wastewater facility. Mr. Mike Allen
is designated as the primary Operator in Responsible Charge (ORC) and is a WW-4. Mr. Kevin
Peaden (WW-4) is the designated backup operator (bORC). Daily operation log books were available
for review.
3. The following is a list of units, with comments:
a. Influent pump station
b. Automatic & manual bar screen & grit removal — This unit is rusty and should be repaired/replaced
in the future.
c. Three primary clarifiers
d. Two trickling filters — Only one in use
e. Four secondary clarifiers — Covered weirs are cleaned annually, sludge blanket kept at 2-3 feet.
f. Chlorine gas disinfection, chlorine contact tank; liquid dechlorination (sulfite);
g. Cascade aeration into Tar River — Effluent appeared clear with no foaming
h. Two aeration basins — older has mechanical air, newer has diffused air
i. Sludge drying beds - Not in use
j. Two anaerobic digesters;
k. Three aerobic digesters
1. Aerated sludge holding lagoon — Recently installed BlueFrog aerators
m. Sludge truck loading station — Sludge is applied to field beside treatment plan by Granville Farms
under Land Application Permit WQ0002047
n. On -site generator — Tested weekly
4. The laboratory was checked in a cursory manner. All instruments, meters, probes, photometric
cells are maintained in good condition. Temperatures on all equipment are checked against an NIST
thermometer. The influent sampler box was 4.5 degrees C and the effluent sampler box was 5 degrees
C. The sample fridge was approximately 2.4 degrees C. The fecal coliform bath was 44.5 degrees C
and the BOD incubator was 20.0 degrees C. All standards, reagents and consumables used are within
expiration dates. Instruments are calibrated daily. A calibration log for all meters is kept up to date.
Flow meters are calibrated once a quarter.
5. Commercial lab results, chain of custody records, and bench streets were compared with data
submitted on the DMR for June and March 2019. No discrepancies were noted. Tarboro WWTP
laboratory analyses fecal coliform, pH, total suspended solids, dissolved oxygen, ammonia, TRC,
BOD, COD, and settleable solids. Environment One analyses TP, TKN, NO2-N + NO3-N, and metals.
Pace Analytical analyses toxicity and the annual pollutant scan.
Page# 2

Permit: NCO020605 Owner -Facility: Tarboro WWTP
Inspection pate: 12/05/2019 Inspection Type: Compliance Evaluation
Permit
Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new
❑
❑
❑
application?
Is the facility as described in the permit?
❑
❑
❑
# Are there any special conditions for the permit?
❑
0
❑
❑
Is access to the plant site restricted to the general public?
0
❑
❑
❑
Is the inspector granted access to all areas for inspection?
■
❑
❑
❑
Comment:
Laboratory
Yes No NA NE
Are Feld parameters performed by certified personnel or laboratory?
0
❑
❑
❑
Are all other parameters(excluding field parameters) performed by a certified lab?
0
❑
❑
❑
# Is the facility using a contract lab?
M❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
0❑
❑
❑
Celsius)?
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees?
0
❑
❑
❑
Incubator (BOD) set to 20.0 degrees Celsius +1- 1.0 degrees?
N
❑
❑
❑
Comment:
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? M ❑ ❑ ❑
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable 0 ❑ ❑ ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment:
Flow Measurement - Influent
Yes No NA NE
# Is How meter used for reporting?
0❑
❑
❑
Is flow meter calibrated annually?
0
❑
❑
❑
Is the How meter operational?
0
❑
❑
❑
(If units are separated) Does the chart recorder match the now meter?
0
❑
❑
❑
Comment:
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit? M ❑ ❑ ❑
Is all required information readily available, complete and current? 0 ❑ ❑ ❑
Page# 3

Permit: NC0020605 owner -Facility: TarboroWWTP
Inspection Date: 1210512019 Inspection Type: Compliance Evaluation
Record Keeping
Yes
No NA NE
Are all records maintained for 3 years (lab. reg. required 5 years)?
M
❑
❑
❑
Are analytical results consistent with data reported on DMRs?
0
❑
❑
❑
Is the chain -of -custody complete?
M
❑
❑
❑
Dates, times and location of sampling
M
Name of individual performing the sampling
0
Results of analysis and calibration
0
Dates of analysis
0
Name of person performing analyses
M
Transported COCs
0
Are DMRs complete: do they include all permit parameters?
0
❑
❑
❑
Has the facility submitted its annual compliance report to users and DWQ?
❑
❑
❑
❑
(If the facility is = or > 5 MGD permitted flow) Do they operate 24f7 with a certified operator
❑
❑
❑
on each shift?
Is the ORC visitation log available and current?
M
❑
❑
❑
Is the ORC certified at grade equal to or higher than the facility classification?
M
❑
❑
❑
Is the backup operator certified at one grade less or greater than the facility classification?
0
❑
❑
❑
Is a copy of the current NPDES permit available on site?
M
❑
❑
❑
Facility has copy of previous year's Annual Report on file for review?
M
❑
❑
❑
Comment:
Flow Measurement - Effluent
Yes No NA NE
# Is flow meter used for reporting?
0
❑
❑
❑
Is flow meter calibrated annually?
s
❑
❑
❑
Is the flow meter operational?
❑
❑
❑
(if units are separated) Does the chart recorder match the flow meter?
❑
❑
❑
Comment:
Pump Station - Influent
Yes No NA NE
Is the pump wet well free of bypass lines or structures?
0
❑
❑
❑
Is the wet well free of excessive grease?
M
❑
❑
❑
Are all pumps present?
0
❑
❑
❑
Are all pumps operable?
■
❑
❑
❑
Are float controls operable?
M
❑
❑
❑
Is SCADA telemetry available and operational?
■
❑
❑
❑
Page# 4

Permit: NCO020605 Owner -Facility: Tarboro 4VwTP
Inspection Date: 12/0512019 Inspection Type: Compliance Evaluation
Pump Station - Influent Yes No NA NE
Is audible and visual alarm available and operational? 0 ❑ ❑ 0
Comment:
Bar Screens
Yes No NA NE
Type of bar screen
a.Manual
■
b.Mechanical
Are the bars adequately screening debris?
0
❑
❑
❑
Is the screen free of excessive debrs?
N❑
❑
Is disposal of screening in compliance?
❑
Is the unit in good condition?
13
0
El
El
Comment: Bar Screen and Grit Remover unit needs repairlrei3lacement
Grit Removal
Yes No NA NE
Type of grit removal
a,Manual
b.Mechanical
Is the grit free of excessive organic matter?
1:1
El El
Is the grit free of excessive odor?
# Is disposal of grit in compliance?
0
Comment:
Primary Clarifier
Yes No NA NE
Is the clarifier free of black and odorous wastewater?
Is the site free of excessive buildup of solids in center well of circular clarifier?
Are weirs level?
❑
❑
Is the site free of weir blockage?
Is the site free of evidence of short-circuiting?
Is scum removal adequate?
❑
El
Is the site free of excessive floating sludge?
M
❑
❑
Is the drive unit operational?
M
C1❑
❑
Is the sludge blanket level acceptable?
Is the sludge blanket level acceptable? (Approximately %, of the sidewall depth)
Page# 5

Permit: NC0020605 Owner -Facility: TarboroWWTP
inspection Date: 12l05l2019 Inspection Type: Compliance Evaluation
Primary Clarifier Yes No NA NE
Comment:
Trickling Filter
Yes
No NA NE
Is the filter free of ponding?
0
❑
❑
❑
Is the filter free of leaks at the center column of filter's distribution arms?
N
❑
❑
❑
1s the distribution of flow even from the distribution arms?
N
❑
❑
❑
Is the filter free of uneven or discolored growth?
N
❑
❑
❑
Is the filter free of sloughing of excessive growth?
0
❑
❑
❑
Are the filter's distribution arms orifices free of clogging?
N
❑
❑
❑
Is the filter free of excessive filter flies, worms or snails?
0
❑
❑
❑
Comment:
Secondary Clarifier
Yes No NA NE
Is the clarifier free of black and odorous wastewater?
N
❑
❑
❑
Is the site free of excessive buildup of solids in center well of circular clarifier?
N
❑
❑
❑
Are weirs level?
N
❑
❑
❑
Is the site free of weir blockage?
0
❑
❑
❑
Is the site free of evidence of short-circuiting?
0
❑
❑
❑
Is scum removal adequate?
0
❑
❑
❑
Is the site free of excessive floating sludge?
S
❑
❑
❑
Is the drive unit operational?
N
❑
❑
❑
Is the return rate acceptable (low turbulence)?
N
❑
❑
❑
Is the overflow clear of excessive solids/pin floc?
N
❑
❑
❑
Is the sludge blanket level acceptable? (Approximately 14 of the sidewall depth)
N
❑
❑
❑
Comment:
Aeration Basins Yes No NA NE
Mode of operation Ext. Air
Type of aeration system Diffused
Is the basin free of dead spots? N ❑ ❑ ❑
Are surface aerators and mixers operational?
0
❑
❑
❑
Are the diffusers operational?
E
❑
❑
❑
Is the foam the proper color for the treatment process?
E
❑
❑
❑
Page# 6

Permit: NCO020605
Owner - Facility: Tarboro WWTP
Inspection Date: 12/05/2019
Inspection Type. Compl ance Evaluation
Aeration Basins
Yes No NA NE
Does the foam cover less than 25% of the basin's surface?
■
❑
❑
❑
Is the DO level acceptable?
0
❑
❑
❑
Is the DO level acceptable?(1.0 to 3.0 mgll)
0
❑
❑
❑
Comment:
Disinfection -Gas
Yes
No NA NE
Are cylinders secured adequately?
E❑
❑
❑
Are cylinders protected from direct sunlight?
■
❑
❑
❑
Is there adequate reserve supply of disinfectant?
❑
❑
❑
Is the level of chlorine residual acceptable?
❑
❑
❑
Is the contact chamber free of growth, or sludge buildup?
0❑
❑
❑
Is there chlorine residual prior to de -chlorination?
❑
❑
0
Does the Stationary Source have more than 2500 Ibs of Chlorine (GAS No. 7782-50-5)?
❑
❑
0
If yes, then is there a Risk Management Plan on site?
❑
❑
❑
If yes, then what is the EPA twelve digit ID Number?
If yes, then when was the RMP last updated?
Comment:
De -chlorination Yes No NA NE
Type of system ?
Liquid
Is the feed ratio proportional to chlorine amount (1 to 1)? ❑ ❑ ❑
Is storage appropriate for cylinders? ❑ ❑ ❑
# Is de -chlorination substance stored away from chlorine containers? 0 ❑ ❑ ❑
Comment:
Are the tablets the proper size and type? ❑ Cl N ❑
Are tablet de -chlorinators operational? 110 No
Number of tubes in use?
Comment:
Pumps-RAS-WAS
Yes
No NA NE
Are pumps in place?
E❑
❑
❑
Are pumps operational?
■
o
❑
❑
Are there adequate spare parts and supplies on site?
N
❑
❑
❑
Page# 7

Permit: NCO020605 Owner - Facility: Tarboro WWTP
Inspection Date: 12 V2019 Inspection Type: Compliance Evacuation
Pum s-RAS-WAS Yes No NA NE
Comment:
Effluent Pi e
Is right of way to the outfall property maintained?
Are the receiving water free of foam other than trace amounts and other debris?
If effluent (diffuser pipes are required) are they operating property?
Comment:
Standby Power
Is automatically activated standby power available?
Is the generator tested by interrupting primary power source?
is the generator tested under load?
Was generator tested & operational during the inspection?
Do the generator(s) have adequate capacity to operate the entire wastewater site?
Is there an emergency agreement with a fuel vendor for extended run on back-up power?
Is the generator fuel level monitored?
Comment:
Yes No NA NE
00130
■
❑
❑
❑
❑
❑
■
❑
Yes No NA NE
Page# 8