NC0025445_Compliance Evaluation Inspection_20230216

United States Environmental Protection Agency
Form Approved.
EPA Washington, D.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/mo/day Inspection Type Inspector Fac Type
1 IN 1 2 u 3 I NCO025445 111 121 23/02/03 I17 18 LC] I 19 I s I 20L]
21111I I I I I I I II I I I I I I I I I I I I I I I I I I I I I I I II I I I I I r6
Inspection
Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved -------------------
67
I 72 I ni I 71 I 74 79 I I I I I I I80
701 I 71 I LL -1 I I
LJ
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
Entry Time/Date
Permit Effective Date
POTW name and NPDES Dermit Number)
09:30AM 23/02/03
17/08/01
Randleman WWTP
3475 Applewood Rd
Exit Time/Date
Permit Expiration Date
Randleman NC 27317
11:30AM 23/02/03
21/08/31
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
Other Facility Data
Garry Michael Glass/ORC/336-498-2254/
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Nick Holcomb,204 S Main St Randleman NC 273171814//336-495-7500/
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit 0 Flow Measurement Operations & Maintenar Records/Reports
Self -Monitoring Progran 0 Sludge Handling Dispo: Facility Site Review Compliance Schedules
Effluent/Receiving Wate 0 Laboratory
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date
Jesse Barnes Docu8igned by: DWR/WSRO WQ/336-776-9701/
2/16/2023
EY"41797473D3194ED...
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
DocuSigned by:
3ennifer F. Graznak mt'� ' DWR/WSRo 336-776-9695 2/16/2023
-0=3CE3H B7456.-
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
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NPDES yr/mo/day Inspection Type
NCO025445 I11 12I 23/02/03 117 18 i c i
(Cont.)
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Jesse Barnes, of the North Carolina Division of Water Resources (DWR), Winston-Salem Regional
Office (WSRO), conducted a compliance evaluation inspection of the Randleman WWTP on February
3, 2023. Garry Michael Glass, Operator in Responsible Charge (ORC), was present for the
inspection. The facility was found to be compliant with the subject permit. Inspection findings are
detailed in the attached Water Compliance Inspection Report.
NPDES permit NC0025445 was issued August 1, 2017 and expired August 31, 2021. A permit renewal
application has been submitted. Pursuant to subject permit section B.10, the permittee is
automatically authorized to discharge past the permit expiration date if the permittee has submitted
such information, forms, and fees as are required by the issuing agency. Permit NC0025445 has a
special condition for a schedule of compliance with total lead limits at outfall 001. The facility was as
described in the permit. The facility is restricted to the general public by a metal chain link fence and
access gate. The inspector was granted access to all areas for inspection.
All permit -required records were on site, well organized, and available for review. The DMR and
associated data logs/COCs for October 2022 were reviewed for consistency and no errors were
found. Staff at this facility maintain recordkeeping as required by the permit.
Part I, section A. 5. of permit NC0025445 enumerates a schedule of compliance for total lead limits at
outfall 001, which ended August 31, 2022. The permittee is now required to maintain compliance with
the total lead limits specified in Section A. (1.) of the subject permit.
Flow, TRC, temperature, dissolved oxygen, and pH have been performed on site under field
laboratory certification # 5112. All other permit -required parameters have been analyzed by certified
laboratory # 165, Meritech Inc. The on -site laboratory refrigerator for sample storage has been
checked daily for temperature compliance and was observed to be 2 degrees Celsius during the
inspection.
The influent pump station is off site from the main treatment facility. The inspector was granted
access to the influent pump station. The influent pump station appeared to be well maintained. Float
controls and telemetry system were observed to be operational and have been monitored via mobile
application. Audible and visual alarms were present but the inspector did not request a test.
The influent composite sampler is programmed to pull constant volume/constant time aliquots,
therefore influent composite sampling is not flow proportional as required by Part Il, Section A of the
subject permit.
Grit removal was not evaluated.
The mechanical bar screen system is located off site at the influent pump station. The bar screen
system appeared to be operating properly and well maintained.
The facility utilizes four circular extended diffused aeration basins, each of which encircles a
secondary clarifier. All aeration basins and diffusers appeared to be operating properly. Any surface
foam present was the proper color, not excessive, and covered less than 25% of the basins'
surfaces.
Each of the four secondary clarifiers are located in the center of each aeration basin. Wastewater in
the clarifiers appeared to have appropriate clarity and color. Because the clarifiers and totally
encircled by aeration basins, they are difficult to safely access and inspect. Some buildup of solids
along the inner walls and weirs of the clarifier was noted during the inspection.
The facility maintains two 1-ton cylinders of chlorine gas on sitefor disinfection. The cylinders were
Page#

Permit: NCO025445
Inspection Date: 02/03/2023
Owner -Facility: Randleman WWTP
Inspection Type: Compliance Evaluation
stored indoors in the same room as sulfur dioxide gas cylinders and operate with an automatic
switch -over system. The chlorine contact chamber is split into two channels with several baffles in
each channel to provide contact time. One side/channel of the contact chamber appeared to be twice
the length of the other side. Although the chlorine contact chamber is asymmetrical, the facility has
not had compliance issues related to disinfection. Some vegetative growth along the inner walls and
baffles of the chlorine contact chamber was noted during the inspection.
The facility uses a sulfur dioxide gas feed system for de -chlorination. Five 150 lb cylinders of sulfur
dioxide gas were maintained on site. The sulfur dioxide was stored in the same room as chlorine gas.
The facility utilizes a traveling bridge vacuum tertiary filter. The filter and its entire backwashing
process operates automatically and recirculates backwash wastewater to the beginning of the
treatment process. Corrosion was observed on the walls and other metal surfaces of the filter
structure. ORC, Mr. Glass, indicated that the facility plans to replace the filter in the near future.
The aerobic digesters and RAS/WAS pumps were not evaluated.
The automatic whole -plant generator is tested automatically on a schedule. During testing, the
primary power source is interrupted and the generator is tested under load.
The effluent flow meter has been calibrated annually and was observed to be operational during the
inspection. The effluent flow meter measures flow at a point between the chlorine contact chamber
and the cascade aerator.
The effluent composite sampler is programmed to draw aliquots at constant volume and variable
timing, dependent on flow. Effluent samples are collected after all treatment units but before the point
at which effluent waters enter the receiving stream.
A path to the effluent pipe was present, but access is challenging due to steep grades and mud. No
foam or other debris were observed in the receiving stream. The outfall point of the effluent pipe was
observed to be fully submerged in the stream and Mr. Glass indicated the pipe is typically
submerged. With the outfall submerged, the quality of effluent water was difficult to assess visually.
The subject permit lists the upstream sampling site as "Fox Street". Fox street becomes East Naomi
Street at their intersection, and the street name is East Naomi Street at the bridge crossing sampling
point. This is where upstream samples are collected. The downstream sampling location was not
evaluated.
Page#

Permit: NCO025445 Owner -Facility: Randleman WWTP
Inspection Date: 02/03/2023 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
0
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application?
Is the facility as described in the permit?
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# Are there any special conditions for the permit?
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Is access to the plant site restricted to the general public?
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Is the inspector granted access to all areas for inspection?
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Comment: NPDES permit NCO025445 was issued Auqust 1, 2017 and expired Auqust 31, 2021
The permittee has submitted a permit renewal application and is awaiting review. The
facility is as described in the permit. Permit NCO025445 has a special condition for a
schedule of compliance with total lead limits at outfall 001. Access to the facility is
restricted to the general public with a fence and gated entrace. The inspector was
granted access to all areas for the inspection.
Record Keeping
Are records kept and maintained as required by the permit?
Is all required information readily available, complete and current?
Are all records maintained for 3 years (lab. reg. required 5 years)?
Are analytical results consistent with data reported on DMRs?
Is the chain -of -custody complete?
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
Are DMRs complete: do they include all permit parameters?
Has the facility submitted its annual compliance report to users and DWQ?
(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?
Facility has copy of previous year's Annual Report on file for review?
Yes No NA NE
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Page# 4

Permit: NCO025445
Inspection Date: 02/03/2023
Record Keeping
Owner -Facility: Randleman WWTP
Inspection Type: Compliance Evaluation
Yes No NA NE
Comment: All permit -required records were on site, well organized, and available for review. The
DMR and associated data lops/COCs for October 2022 were reviewed for consistency
and no errors were found. Staff at this facility maintain recordkeeping as required by
the permit.
Compliance Schedules
Is there a compliance schedule for this facility?
Is the facility compliant with the permit and conditions for the review period?
Yes No NA NE
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Comment: Part I, section A. 5. of permit NCO025445 enumerates a schedule of compliance for
total lead limits at outfall 001, which ended August 31, 2022. The permittee is now
required to maintain compliance with the total lead limits specified in Section A. (1.) of
the subject permit.
Laboratory
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?
# Is proper temperature set for sample storage (kept at less than or equal to 6.0
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?
Yes No NA NE
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Comment: Flow, TRC, temperature, dissolved oxygen, and pH have been performed on site under
field laboratory certification # 5112. All other permit -required parameters have been
analyzed by certified laboratory # 165, Meritech Inc. The on -site laboratory
refridgerator for sample storage is checked daily for temperature compliance and was
observed to be 2 degrees Celsius during the inspection.
Pump Station - Influent
Yes
No
NA
NE
Is the pump wet well free of bypass lines or structures?
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Is the wet well free of excessive grease?
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Are all pumps present?
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Are all pumps operable?
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Are float controls operable?
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Is SCADA telemetry available and operational?
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Is audible and visual alarm available and operational?
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Page# 5

Permit: NCO025445
Inspection Date: 02/03/2023
Owner -Facility: Randleman WWTP
Inspection Type: Compliance Evaluation
Pump Station - Influent Yes No NA NE
Comment: The influent pump station is located near 240 Upton St, Randleman, NC 27317, off site
from the main treatment facility. The inspector was granted access to the influent pump
station. The influent pump station appeared to be well maintained and was secure from
public access via a locked and gated chain link fence. Float controls and the telemetry
system were observed to be operational via mobile application. Audible and visual
alarms were Dresent but the insDector did not reauest a test.
Influent Sampling
Yes
No
NA
NE
# Is composite sampling flow proportional?
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0
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Is sample collected above side streams?
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Is proper volume collected?
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Is the tubing clean?
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# Is proper temperature set for sample storage (kept at less than or equal to 6.0
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degrees Celsius)?
Is sampling performed according to the permit?
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Comment: The influent composite sampler is programmed to pull constant volume/constant time
aliquots, therefore influent composite sampling is not flow proportional as required
by
part II, section A of the subject permit.
Grit Removal
Yes
No
NA
NE
Type of grit removal
a.Manual
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b.Mechanical
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Is the grit free of excessive organic matter?
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Is the grit free of excessive odor?
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# Is disposal of grit in compliance?
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Comment: Grit removal was not evaluated.
Bar Screens
Yes
No
NA
NE
Type of bar screen
a.Manual
❑
b.Mechanical
Are the bars adequately screening debris?
0
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Is the screen free of excessive debris?
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Is disposal of screening in compliance?
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Is the unit in good condition?
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Page# 6

Permit: NCO025445
Inspection Date: 02/03/2023
Bar Screens
Owner -Facility: Randleman WWTP
Inspection Type: Compliance Evaluation
Yes No NA NE
Comment: The mechanical bar screen system is located off site at the influent pump station near
240 Upton St, Randleman, NC 27317. Screened materials were being collected into
garbage disposal bins. The bar screen appeared to be operating properly
and well
maintained.
Aeration Basins
Yes
No
NA
NE
Mode of operation
Ext. Air
Type of aeration system
Diffused
Is the basin free of dead spots?
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Are surface aerators and mixers operational?
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Are the diffusers operational?
0
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Is the foam the proper color for the treatment process?
0
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Does the foam cover less than 25% of the basin's surface?
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Is the DO level acceptable?
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Is the DO level acceptable?(1.0 to 3.0 mg/1)
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Comment: The facility utilizes four circular extended diffused aeration basins,
each of which
encircles a secondary clarifier. All aeration basins and diffusers appeared
to be
operating properly. Any surface foam present was the proper color,
not excessive,
and
covered less than 25% of the basins' surfaces.
Secondary Clarifier
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?
Is the site free of excessive floating sludge?
Is the drive unit operational?
Is the return rate acceptable (low turbulence)?
Is the overflow clear of excessive solids/pin floc?
Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth)
Yes No NA NE
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Comment: Each of the four secondary clarifiers are located in the center of each aeration basin
Wastewater in the clarifiers appeared to have appropriate clarity and color. Because
the clarifiers and totally encircled by aeration basins, they are difficult to safely access
and inspect. Some buildup of solids along the inner walls and weirs of the clarifier was
noted during the inspection.
Page# 7

Permit: NCO025445
Inspection Date: 02/03/2023
Disinfection -Gas
Are cylinders secured adequately?
Owner -Facility: Randleman WWTP
Inspection Type: Compliance Evaluation
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?
Is there chlorine residual prior to de -chlorination?
Does the Stationary Source have more than 2500 Ibs of Chlorine (CAS No.
7782-50-5)?
If yes, then is there a Risk Management Plan on site?
If yes, then what is the EPA twelve digit ID Number? (1000- - )
If yes, then when was the RMP last updated?
Yes No NA NE
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Comment: The facility maintains two 1-ton cylinders of chlorine qas on site for disinfection. The
cylinders were stored indoors in the same room as sulfur dioxide gas cylinders and
operate with an automatic switch -over system. The chlorine contact chamber is split
into two channels with several baffles in each channel to provide contact time. One
side/channel of the contact chamber appeared to be twice the length of the other side.
Although the chlorine contact chamber is asymmetrical, the facility has not had
compliance issues related to disinfection. Some vegetative growth along the inner walls
and baffles of the chlorine contact chamber was noted durina the insDection.
De -chlorination
Yes
No
NA NE
Type of system ?
Gas
Is the feed ratio proportional to chlorine amount (1 to 1)?
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Is storage appropriate for cylinders?
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# Is de -chlorination substance stored away from chlorine containers?
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Are the tablets the proper size and type?
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Comment: The facility uses a sulfur dioxide gas feed system for de -chlorination. Five 150 lb
cylinders of sulfur dioxide gas were being maintained on site. The sulfur dioxide was
stored in the same room as chlorine gas.
Are tablet de -chlorinators operational? ❑ ❑ 0 ❑
Number of tubes in use?
Comment:
Filtration (High Rate Tertiary) Yes No NA NE
Type of operation: Down flow
Is the filter media present? 0 ❑ ❑ ❑
Is the filter surface free of clogging? 0 ❑ ❑ ❑
Page# 8

Permit: NCO025445 Owner -Facility: Randleman WWTP
Inspection Date: 02/03/2023 Inspection Type: Compliance Evaluation
Filtration (High Rate Tertiary) Yes No NA NE
Is the filter free of growth?
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Is the air scour operational?
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Is the scouring acceptable?
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Is the clear well free of excessive solids and filter media?
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Comment: The facilitv utilizes a travelinq bridqe vacuum tertiary filter. The filter and its entire
backwashing process operates automatically and recirculates backwash wastewater to
the beginning of the treatment process. Corrosion was observed on the walls and other
metal surfaces of the filter structure. Mr. Glass, ORC, indicated that the facility plans to
replace the filter in the near future.
Aerobic Digester
Is the capacity adequate?
Is the mixing adequate?
Is the site free of excessive foaming in the tank?
# Is the odor acceptable?
# Is tankage available for properly waste sludge?
Comment: The aerobic digesters were not evaluated.
Pumps-RAS-WAS
Are pumps in place?
Are pumps operational?
Are there adequate spare parts and supplies on site?
Comment: RAS/WAS pumps were not evaluated.
Yes No NA NE
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Yes
No
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Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? 0 ❑ ❑ ❑
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable ❑ ❑ ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
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?
Yes No NA NE
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Page# 9

Permit: NC0025445 Owner -Facility: Randleman WWTP
Inspection Date: 02/03/2023 Inspection Type: Compliance Evaluation
Standby Power Yes No NA NE
Do the generator(s) have adequate capacity to operate the entire wastewater site? 0 ❑ ❑ ❑
Is there an emergency agreement with a fuel vendor for extended run on back-up ❑ ❑ ❑ ■
power?
Is the generator fuel level monitored? 0 ❑ ❑ ❑
Comment: The automatic whole -plant generator is tested automatically on a schedule. During
testing, the primary power source is interrupted and the generator is tested under load.
Flow Measurement - Effluent
# Is flow meter used for reporting?
Is flow meter calibrated annually?
Is the flow meter operational?
(If units are separated) Does the chart recorder match the flow meter?
Yes No NA NE
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Comment: The effluent flow meter has been calibrated annually and was observed to be
operational during the inspection. The effluent flow meter measures flow at a point
between the chlorine contact chamber and the cascade aerator.
Effluent 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 less than or equal to 6.0
degrees Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type
representative)?
Yes No NA NE
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Comment: The effluent composite sampler is programmed to draw aliquots at constant volume
and variable timing, dependent on flow. Effluent samples are collected after all
treatment units but before the point at which effluent waters enter the receiving
stream.
Effluent Pipe
Yes
No
NA
NE
Is right of way to the outfall properly maintained?
0
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Are the receiving water free of foam other than trace amounts and other debris?
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If effluent (diffuser pipes are required) are they operating properly?
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Comment: A path to the effluent pipe was present, but access is challenginq due to steep qrades
and mud. No foam or other debris were observed in the recieving stream. The outfall
point of the effluent pipe was observed to be fully submerged in the stream and Mr.
Glass indicated the pipe is typically submerged. With the outfall submerged, the quality
of effluent water was difficult to assess visually.
Page# 10

Permit: NC0025445
Inspection Date: 02/03/2023
Effluent Pipe
Upstream / Downstream Sampling
Owner -Facility: Randleman WWTP
Inspection Type: Compliance Evaluation
Is the facility sampling performed as required by the permit (frequency, sampling type,
and sampling location)?
Yes No NA NE
Yes No NA NE
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Comment: The subject permit lists the upstream sampling site as "Fox Street". Fox street becomes
East Naomi Street at their intersection, and the street name is East Naomi Street at the
bridge crossing sampling point. This is where upstream samples are collected. The
downstream sampling location was not evaluated.
Page# 11