NC0024571_Inspection_20040330

ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Michael F. Easley, Governor
March 30, 2004
Mr. Todd Powell, City Manager
City of Lumberton
P.O. Box 1388
Lumberton, NC 28359
Subject: COMPLIANCE EVALUATION INSPECTION (CEI)
City of Lumberton Wastewater Treatment Plant
NPDES Permit No. NC0024571
Robeson County
William G. Ross Jr., Secretary
Alan W. Klimek, P.E., Director
Coleen H. Sullins, Deputy Director
Division of Water Quality
Dear Mr. Powell:
Enclosed you will find a copy of the Compliance Evaluation Inspection report for the inspection
conducted on March 16, 2004. As part of the inspection a tour of the Wastewater Treatment Plant was
conducted. Recommendations are in Part D: Summary of Findings/Comments of this inspection report;
those recommendations are as follows:
1) relocate the influent ultrasonic flow meters (that are presently located outside of the Parshall
flumes) to the recommended two-thirds upstream of the throat inlet, in the converging section of
each flume (see the enclosures with this report for references),
2) repair the leak (short circuiting) under the weir of #5 clarifier (on the East side of clarifier #5),
3) repair the out -of -service grit chamber,
4) repair the out -of -service effluent flow. meter.
Please respond to the above recommendations by May 3, 2004 to the Fayetteville Regional Office.
If you have any questions or comments concerning this report or require clarification on part(s) of this
report, please feel free to contact me at [phone], extension 712.
Sincerely,
Dale Lopez
Environmental Specialist
/d1
Enclosures: EPA Water Compliance Inspection Report
Inspection checklist
NPDES Compliance Inspection Manual, September 1994, 6-10, G-20
Isco Open Channel Flow Measurement Handbook, 5th Ed., 67, 71, 168
cc: Jon Locklear, City of Lumberton, (ORC) One
NorthCarolina
225 Green Street — Suite 714, Fayetteville, North Carolina 28301-5043 Naturally
Phone: [phone] FAX: [phone] \ Internet: wwwenr.state.nc.us/ENR/
An Equal Opportunity / Affirmative Action Employer - 50 % Recycled 110 % Post Consumer Paper

United States Environmental Protection Agency
EPA Washington, D.C. 20460
Water Compliance Inspection Report .
Form Approved.
OMB No. 2040-0057
Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yrlmolday Inspection
I.,,, 1 I 2 U 31 NC0024571 111 121 04/03/16 117
Type . Inspector Fac Type
18U 19U 20u
I I' _I 11. I I I I I I I_ I 1166
L J • Remarks
211 I I I I I I I I I I I (i I i I I I I I I I I I I I I I I I I
Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA
671 2.0 169 70 U 71 LJ 72 LIT
--Reserved-
731 I 174 751 I I 1 I I I 180
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
POTW name and NPDES permit Number)
Lumberton WWTP
700 Lafayette Street Extension
Lumberton NC 28359
Entry Time/Date
10:00 AM 04/03/16
Permit Effective Date
01/02/01
Exit Time/Date
04:00 PM 04/03/16
. Permit Expiration Date
04/07/31.
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
Jon W Locklear/ORC/910-671-3859/
///
Other Facility Data
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
William Todd Powell,PO Box 1388 Lumberton NC No
28358//910-671-3859/9106713814
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit 1 Flow Measurement • 1 Operations & Maintenance
II Records/Reports
- Self -Monitoring Program 1 Facility Site Review 1 Effluent/Receiving Waters
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists, as necessary)
(See attachment summary)
Name(s) a Signature(s) of Inspectors) Agency/Office/Phone and Fax
Dale Lopez '\ FRO WQ//910-486-1541/910-486-0707
Numbers • Date
• L.3/?)
Signature f Managem A i wer Agency/Office/Phone and Fax Numbers Date
�
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.

3I•
NPDES
NC0024571
11 12
yr/mo/day Inspection Type 1
04/03/16. 117 18 1,,1
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Please relocate the ultrasonic flow meters at the influent Parshall Flumes to the recommended two-thirds
upstream of the throat inlet, in the converging section. Please repair the leak (short circuiting) under the
#5 clarifier weir that is located on the East side of the.#5 clarifier. Please repair the out -of -service grit
chamber and the out=of-service effluent flow meter.
J

Permit: NC0024571 • Owner - Facility: City of Lumberton - Lumberton. WWTP
Inspection Date: 03/16/04 - Inspection Type: Compliance Evaluation .
PermR "
(If the present permit expires in 6 months'or less).
Is the facility as described in the permit?
Are there any special conditions for the permit?
Is access to the plant site restricted to the general public?
Is the inspector granted access to all areas for inspection?
Comment:
Operations & Maintenance
Does the plant have general safety structures in place such as rails around or covers over tanks, pits, or wells?
Is the plant generally clean with acceptable housekeeping?
Comment:
Has the permittee submitted a new application?
?limn Station - Influent •
Is the pump wet well free of bypass lines or structures?
Is the general housekeeping acceptable?
Is the wet well free of excessive grease?
Are all pumps present?
Are all pumps operable?
Are float controls.operable?
Is SCADA telemetry available and operational?
Is audible and visual alarm available and operational?
Comment:
Rar Screens
Type of bar screen
a.Manual
b.Mechanical
Are the bars adequately screening debris?
Is the screen free of excessive debris?
Is disposal of screening in compliance?
Is the unit in good condition?
Comment:
Grit Removal
Type of grit•removal
a.Manual
b.Mechanical
Is the site free of excessive organic content in the grit chamber?
Is the site free of excessive odor?
Is disposal of grit in compliance?
Comment:Out-of-Service since 03/09/2004. The impeller arid wear plate were worn out.
ecnndary-(lariifier
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? •
Yes No NA NF
1000
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Yes No NA NF
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Yes No NA NF
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111000
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Yes No NA NF
0
El
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Yes No NA NF
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.1000
■ ,❑ 0 ❑
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Permit: NC0024571 Owner - Facility: City of Lumberton - Lumberton WWTP
Inspection Date: 03/16/04 Inspection Type: Compliance Evaluation
,Secondary Clarifier Yes No NA NF
Is the site free of excessive floating sludge? . • • ❑ ❑ ❑
Is the drive unit operational? 1000
Is the sludge blanket level acceptable? 1000
Is the retum rate acceptable (low turbulence)? 11000
Is the overflow clear of excessive solids/pin floc? 11 ❑ 0 0
Is the surface free of bulking ? i ❑ ❑ ❑
Comment:There is a small leak under the weir on east side of #5 clarifier.
Pumps-RAS-WM Yes No NA NF
Are pumps in place? I1000
Are pumps operational? NI ❑ ❑ ❑
Are there adequate spare parts and supplies on site? 1000
Comment:
Aeration Basins Yes No NA NF
Mode of operation
Type of aeration system
Is the basin free of dead spots? 11 ❑ ❑ ❑
Are surface aerators and mixers operational? •❑ ❑ ❑
Are the diffusers operational? 0 0 111 0
Is the foam the proper color for the treatment process? ❑ ❑ 11❑
Does the foam cover less than 25% of the basin' s surface? 11000
Is the DO level acceptable? 1 DOD
Are settleometer results acceptable? ❑ ❑ ❑
Comment:Settleometer reading of 960 mUU30-minutes on the day of the inspection. According to Mr. Sessoms, it
usually was between 600 to 700 mUL/30-minutes.
nisinfectinn Yes No NA NF
Type of system ?
Are cylinders secured adequately? ■ ❑ ❑ ❑
Are cylinders protected from direct sunlight? 1 ❑ ❑ ❑
Is there adequate reserve supply of disinfectant? 1 ❑ ❑ ❑
Is ventilation equipment operational? 11000
Is ventilation equipment properly located? 1 ❑ ❑ ❑
Is SCBA equipment available on site? ❑ ❑ NI 0
Is SCBA equipment operational? ❑ ❑ 1 ❑
Is staff trained is operating SCBA equipment? ❑ ❑ 1 0
Is staff trained in emergency procedures? 1 ❑ ❑ ❑
Is an evacuation plan in place? 0 0 0 •
Are tablet chlorinators operational? ❑ ❑ 110
Are the tablets the proper size and type? 0 0 • 0
Number of tubes in use?
(Sodium Hypochiorite) Is pump feed system operational? . ❑ ❑ 11 0
Is bulk storage tank containment area adequate? (free of leaks/open drains) 0 0 • 0
Is the level of chlorine residual acceptable? 1 ❑ ❑ ❑
Is there adequate detention time 0 0 0 •
Is the contact chamber free of growth, or sludge buildup? 1 ❑ ❑ ❑
Comment:

Permit: NC0024571
Owner - Facility: City of Lumberton - Lumberton WWTP
Inspection Date: 03/16/04 Inspection Type: Compliance Evaluation
le -chlorinating
Type of system ?
Is the feed ratio proportional to chlorine amount (1 to 1)? •❑ ❑ ❑
Is storage appropriate for cylinders? • 0 0 0
Is de -chlorination substance stored away from chlorine containers? •❑ ❑ ❑
Is ventilation operational? • ❑ ❑ ❑
Comment:
Are the tablets the proper size and type? ❑ ❑ 1E❑
Are tablet de -chlorinators operational? ❑ ❑ E ❑
Number of tubes in use?
Comment:
Standhy Power YPs No NA NF
Is automatically activated standby power available? 0 0 0 •
Is generator tested weekly by interrupting primary power source? 0 0 0 ■
Is generator tested under load at least quarterly? • 0 0 0
Was generator tested & operational during the inspection? 0 0 0 •
Do the generator(s) have adequate capacity to operate the entire wastewater site? • 0 0 0
Does generator have adequate fuel? 000.
Is there an emergency agreement with a fuel vendor for extended run on back-up power? 000.
Comment:
ahnratery
Are field parameters performed by certified personnel or laboratory?
Are all other parameters(excluding field parameters) performed by a certified lab?
Is the facility using a contract lab?
Are analytical results consistent with data reported on DMRs?
Is proper temperature set for sample storage (kept at 1.0 to 4.4 degrees Celsius)?
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees?
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees?
Comment:
Flow Measurement - Influent Yes No NA NF
Is flow meter used for reporting? ❑ ❑ ❑
Is flow meter calibrated annually? • 0 0 0
Is flow meter operating properly? •❑ ❑ ❑
(If units are separated) Does the chart recorder match the flow meter? •❑ ❑ ❑
Comment:The location of the ultrasonic meters were outside of the converging sections of both flumes. Please see
the enclosed reference: "Secondary devices installed in flumes must be located at the converging section point which is
two-thirds upstream of the throat inlet'.
Flow Measurement - Fffluent
Is flow meter used for reporting?
Is flow meter calibrated annually?
Is flow meter operating properly?
(If units are separated) Does the chart recorder match the flow meter?
Comment:Last summer, lightening caused problems with the effluent flow meter that still continues.
Record Keeping
Are records kept and maintained as required by the permit?
Is all required information readily available, complete and current?
YPs No NA NF
Yes No NA NF
■ ❑ ❑ ❑
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• ❑ ❑ ❑
■ ❑ 0 0
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Yes No NA NF
❑ • ❑ ❑
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❑ 00.■
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YAS No NA NF
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111000

Permit: NC0024571
Owner - Facility: City of Lumberton - Lumberton WWTP
Inspection Date: 03/16/04 Inspection Type: Compliance Evaluation
Record Keeping
Are all records maintained for 3 years (lab. reg. required 5 years)?
Are analytical results consistent with data reported on DMRs?
Are sampling and analysis data adequate and include:
Dates, times and location of sampling.
Name of individual performing the sampling
Results of analysis and calibration
Dates of analysis
Name of person performing analyses
Transported COCs
Plant records are adequate, available and include
O&M Manual
As built Engineering drawings
Schedules and dates of equipment maintenance and repairs
Are DMRs complete: do they include all permit parameters?
Has the facility submitted its annual compliance report to users?
(If the facility is = or> 5 MGD permitted flow) Do they operate 24/7 with a certified operator on each shift?
Is the ORC visitation log available and current?
Is the ORC certified at grade equal to or higher than the facility classification?
Is the backup operator certified at one grade less or greater than the facility classification?
Is a copy of the current NPDES permit available on site?
Is the facility description verified as contained in the NPDES permit?
Does the facility analyze process control parameters, for example: MLSS, MCRT, Settleable Solids, DO, Sludge
Judge, pH, and others that are applicable?
Facility has copy of previous year's Annual Report on file for review?
Comment:
Jnfluent Samolinq
Is composite sampling flow proportional?
Is sample collected above side streams?
Is proper volume collected?
Is the tubing clean?
Is proper temperature set for sample storage (kept at 1.0 to 4.4 degrees Celsius)? •
Is sampling performed according to the permit?
Comment:Not required.
Fffluant Sampling
Is composite sampling flow proportional?
Is sample collected below all treatment units?
Is proper volume collected?
Is the tubing clean?
Is proper temperature set for sample storage (kept at 1.0 to 4.4 degrees Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type representative)?
Comment:
Upstream / nownstream Samnlino
Is the facility sampling performed as required by the permit (frequency, sampling type, and sampling location)?
Comment:
Fffluent Pine
Yes No NA NF
1.000
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11000
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Yes No NA NF
O 1100
11000
11000
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Yes No NA NF
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11000
Yes No NA NF
MO D 0
Yps No NA NF

Permit: NC0024571 Owner - Facility: City of Lumberton.- Lumberton WWTP
Inspection Date: 03/16/04 .Inspection Type: Compliance Evaluation
Effluent Pip
Is right of way to the outfall properly maintained?
Are receiving water free of solids and floatable wastewater materials?.
Are the receiving waters free of solids / debris?
Are the receiving waters free of foam other than a trace?
Are the receiving waters free of sludge worms?
If effluent (diffuser pipes are required) are they operating properly?
Comment:There appeared to be more than a trace amount of foam in the receiving stream. However, it was not
observable near the first bridge downstream.
YAs No NA NF
11000
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111000
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Slope 1/4
.'8
Station 1i
T
Submerged flow
Elevation view •
Figure 4-3: Parshall Flume
{
Zero reference
level for Ha
and lib
entering flow, helping to eliminate deposits of sediment which would
otherwise reduce measurement ;accuracy. The approaching flow should
be relatively free of turbulence, eddies; and waves if accurate measure-
ments are expected:
The principal advantagesof the Parshall flume are its capabilities
for self-cleaning (particularly' when compared with sharp -edged weirs),
its relatively low head loss, andits ability to function 'Over a wide oper-
ating range while requiring only a single head measurement..These
characteristics of•the Parshall flume make it particularly suitable for
flow measurement in irrigation canals, certain natural channels, and
sewers. Parshall flume sizes are designated by the throat width, W, as
Flumes • 67
I / /
a ! 'j;, ` N' "'+"t`T^ P s x %e G' ..'�a '� ''J,rrt�ar<`:^-'iisx ,k r 4
. v� v y F z. d ,A f��#�•,r�a�a � .� Via r 6 h' aa, to �„ .c PAS. a,'.�.
Isc.o open Channel
�`-- FIowIVIeasurement
•
•
Manaaoo�
Fifth Edition
By Douglas M. Grant &
,Brian D. Dawson

Faulty fabrication or. construction of the primary device
There are numerouspossibilities for the introduction of errors in
flow measurements resulting from faulty construction of the primary
measuring device. Most typical of these are errors in the crest length of
contracted weirs, errors in the angle of V notch weirs, deviation from
the standard dimensions of Parshall flumes, etc. Any deviation of a pri-
mary device from the standard configuration, dimensions, and geome-
try will result in an error in flow measurement through the device.
Improper gauge or head measuring location
In, most types of primary devices, the head/flow rate relationship
has been empirically. determined with the head being measured at a
specific point in relation to the primary device. Errors will occur if the
gauge or head measuring instrumentatlon is not located at the proper
location in the primary device. Most typical installation errors of this
type occur in weirs where the gauge location is ata point where draw -
down over the weir is measured, for example, by mounting a staff
gauge on the weir plate instead of at the• recommended three to four
times the maximum head upstream from the .weir. Errors can also
occur in flumes if the gauge or head measuring location is not in the
specified position.
Incorrect zero setting
These types of errors are basically as discussed on pages 166-167.
They may also originate from a lack of knowledge of the proper zero.
reference level in the primary device. An example of this is the Palmer-;.
Bowlus flumel where the zero level is the floor of the flume throat, no
the invert of the pipe as might be suspected.
Improper head. measurement
Errors in measuring the head in a primary device will result in flo
measurement errors of the same type and magnitude as those resultii
from an incorrect zero setting.. Improper head measurement may.resu
from an incorrect location of the gauge,. from carelessness innot,
obtaining a good head reading, or from a faulty, improperly instal
or poorly maintained head measuring and recording instrument.
168 • Flow Measurement System Installations
Discharge through a Parshall flume can occur for two conditions of
flow The first condition, free flow, occurs when there is insufficient
backwater depth to reduce the discharge rate. For free flow, only the
head Ha (refer to Figure 4-3) at the upstream. gauge location is needed
to determine the discharge from a standard table. Under free flow con-
ditions a phenomenonknown as the hydraulic jump or "standing
wave" occurs downstream from the flume. Formation of this is a cer-
tain indication of free flow conditions.
A Parshall flume viewed from
upstream. The cable leads to'a
submerged pressure transducer
located across from the staff
gauge.
The same Parshall flume viewed
from downstream: The flume'.is
ine free flow condition. as evi-
denced by the hydraulic jump ..
downstream from the flume..
The second condition of flow, submerged flow, occurs when the
water surface downstream `from the flume is high .enough to reduce the
discharge. When the discharge is increased above a critical value, the
resistance to flow in the downstream channel becomes sufficient to
reduce the velocity, increase the flow depth, andcause a. backwater
effect at the flume. In order to determine the discharge, submerged
flow requires the measurement of both an upstream, depth, Ha, . and a
depth in the throat, Hb (Figure 4-3). The ratio of the downstream
depth to the upstream depth, Hb/Ha, expressed as a percentage, is
referred to as the submergence ratio. Calibration tests show that the
Flumes • 71
1

Flow .Measurement
• Inadequate maintenance=gauge. is not serviced regularly.
• . Incorrect zero setting —zero setting of gauge is not the zero point of the primary
device.
• Operator error —human error exists in the reading.
Specific inspection procedures follow.
Flow Measurement in Weir Applications
• Determine that the head measurement device is positioned. 3 to 4 head lengths
upstream of a weir.
• Verify that the zero or other point of the gauge is equal to that of the primary
device.
The inspector shoulduse an independent method.of measuring head, such as with a
yardstick or carpenter's rule (be sure to measure at least 4 Hupstream and convert to
nearest hundredth of a foot). To determine flow rate, use the appropriate head discharge
relationship formula (see Table G-1).
Flow Measurement in. Parshall Flume Applications
Flow Measurement —Free -Flow Conditions.
• 'Determine upstream head (H.). using staff gauge.
- Verify that staff gauge is set to zero head. A yardstick or carpenter's rule can be
used.
Verify that staff gauge is at proper location (two-thirds the length of the
converging section back from the beginning of the throat).
Read to nearest division the gauge division at which liquid surface intersects
gauge.
Read H. in feet from staff gauge.
To determine flow rate, use. Figure G-6 in the unit desired, use tables published in
flow measurement standard references, or calculate using the coefficients in
Table G-5.
Flow Measurement —Submerged -Flow Condition. Generally, it is difficult to make field
measurements with submerged -flow conditions. In cases when measurements can be
obtained (using a staff or float gauge), the procedures listed below should be. followed:
6-10

Appendix G Supplemental Flow Measurement Information;
Figure G=6
Dimensions and Capacities of Parshall Measuring Flumes for Various Throat Widths
(Associated Water and Air Resource Engineers, Inc., 1973).
Water
Surface
G-20
Converging
Section
° Level Floor
Hb
Throat 1
Section
W
X—►
Diverging
Section
Submerged Flow
Free Flow
Zero Reference
Level for. Ha
and Hb.
461 B-07

NPDES COMPLIANCE
INSPECTION MANUAL
Septernber 1994 .
U.S. Environmental Protection Agency
Office of Enforcement. and Compliance Assurance
401 .M Street, SW
Washington, DC 20460
Recycled/Recyclable . Printed with Vegetable Based Inks on Recycled: Paper (20%G Postconsumer)

City O
J?anzttoiz
Envi¢onmEnLaL 2LESiky cse2viees
April 21, 2004
Mr. Dale Lopez
NCDENR
225 Green Street, Suite 714
Fayetteville, NC 28301-5043
Re: Compliance Inspection, NPDES Permit No. NC 0024571
Dear Mr. Lopez:
APR..;, 2 2004
DWQ
We are in receipt of your report dated March 30, 2004 regarding some recommendations
relative to the wastewater treatment facility. Our response is as follows:
Effluent flow meters were included in the FY 2003/2004 budget under capital items.
These meters were purchased in February 2004 and installed as of March 26, 2004. The
plant is gathering data to compare the influent against the effluent flow. Although the
permit requires flow measurement at either the influent or the effluent, we now have the
ability to measure at both locations.
The ultrasonic flow meter heads located at the influent have been moved to the position
indicated in your report.
The short circuit leak around the weir of clarifier #5 was repaired as of April 16, 2004.
The grit chamber is still out of service. Repairs were made to this unit on March 10 and
we then discovered a crack in the impeller. It has been sent out for repair and we are
awaiting notification that the repair is successful. Once this has been received, the unit
will be placed back in service. We anticipate the unit will be returned to service no later
than May 7.
We trust this adequately addresses your recommendations and ask that you contact me if
additional clarification is needed.
Sincerely,
im Walters
EUSD Director
J�13ox 1388 , LU.In(JEZEOn, OVOREI eazofina 28359 • 910-671-3857 • /L 2 910-671-3889 • Jax 910-671-3989
l VVEL LLE: U7 7WCL.L'urntE¢iorz.ne.us

C: Todd Powell, City Manager
Jon Locklear, ORC
Hope Walters, EUSD Deputy Director