NC0021156_Inspection_20190502

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 I 2 15 I 3 I NCO021156 111 12 I 19/04/30 I17 18 I S I 19 I G I 201 I
211111 1 1 I I I I II I I I I I I I I I I I I 1 I I I I I I I I I I II I I I I I f6
Inspection
Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved -------------------
67
1.0 70 71 [„ I 72 n 73 L_LJ74 751
u I I I I I I I80
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 oermit Number)
10:25AM 19/04/30
11/08/01
Mount Holly WWTP
165 Broome St
Exit Time/Date
Permit Expiration Date
Mount Holly NC 28120
01:20PM 19/04/30
15/02/28
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
Other Facility Data
Douglas Eugene Shoutd/ORC/704-827-4261/
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
David E Johnson,PO Box 406 Mt Holly NC 28120/1-Itility Director/704-951-0074/
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit Flow Measurement Operations & Maintenance Records/Reports
Self -Monitoring Program Sludge Handling Disposal Facility Site Review Effluent/Receiving Waters
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
DocuSigned by:
Maria Schutte Division of Water Quality//704-663-1699) 5/2/2019
CC� i MRO WQ//704-663-1699/
Ori A Tuvia EPPQr
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
W. Corey Basinger Division of Water Quality//704-2;
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
DocuSigned by:
5/2/2019
AtaccsatAFvazs... Page#

NPDES yr/mo/day Inspection Type
NCO021156 I11 121 19/04/30 117 18 JCJ
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Page#

Permit: NCO021156
Inspection Date: 04/30/2019
Owner - Facility: Mount Holly WWTP
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
❑
❑
❑
application?
Is the facility as described in the permit?
0
❑
❑
❑
# 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?
0
❑
❑
❑
Comment: The subject permit expired on 2/28/2015. The facility had sent a permit renewal application.
Record Keeping
Yes No NA NE
Are records kept and maintained as required by the permit?
0
❑
❑
❑
Is all required information readily available, complete and current?
0
❑
❑
❑
Are all records maintained for 3 years (lab. reg. required 5 years)?
0
❑
❑
❑
Are analytical results consistent with data reported on DMRs?
0
❑
❑
❑
Is the chain -of -custody complete?
0
❑
❑
❑
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 CM
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?
0
❑
❑
❑
Comment: Records reviewed during the inspection were organized and well maintained. DMRs, COCs,
bench sheets, calibration logs and ORC logs, were reviewed for the period July
2018
through April 2019.
Influent Sampling
Yes No NA NE
Page# 3

Permit: NCO021156 Owner - Facility: Mount Holly WWTP
Inspection Date: 04/30/2019 Inspection Type: Compliance Evaluation
Influent Sampling
Yes No NA NE
# Is composite sampling flow proportional?
0
❑
❑
❑
Is sample collected above side streams?
0
❑
❑
❑
Is proper volume collected?
0
❑
❑
❑
Is the tubing clean?
N
❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
0
❑
❑
❑
Celsius)?
Is sampling performed according to the permit?
0
❑
❑
❑
Comment: The subject permit requires influent BOD and TSS composite samples. Regular sampler
aliquot verifications are performed and documented.
Effluent Sampling
Yes No NA NE
Is composite sampling flow proportional?
0
❑
❑
❑
Is sample collected below all treatment units?
0
❑
❑
❑
Is proper volume collected?
0
❑
❑
❑
Is the tubing clean?
0
❑
❑
❑
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
0
❑
❑
❑
Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type
S
❑
❑
❑
representative)?
Comment: The subiect Dermit reauires composite and arab effluent samples. Reaular sampler aliauot
verifications are performed and documented.
Upstream / Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit (frequency, sampling type, and 0 ❑ ❑ ❑
sampling location)?
Comment:
Laboratory
Yes No NA NE
Are field 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?
0
❑
❑
❑
# 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 +/- 1.0 degrees?
❑
❑
0
❑
Page# 4

Permit: NCO021156
Inspection Date: 04/30/2019
Laboratory
Owner - Facility: Mount Holly WWTP
Inspection Type: Compliance Evaluation
Yes No NA NE
Comment: Influent and effluent analvses (includina field Darameters) are Derformed under the Citv's
laboratory certification #215. Shealy Environmental Services, Inc. (LTMP, low level mercury,
metals, nutrients) and ETS Labs (toxicity) have also been contracted to provide analytical
support. The laboratory instrumentation used for field analyses appeared to be properly
calibrated/verified and documented.
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: The facilitv had a maior failure to one of its three aeration basins. Aeration basin had a maior
failure several years ago. At the time of the failure the facility indicated that the basin will be
cleaned out and will be permanently out of service. However, the basin, since the failure, has
not been cleaned out of solids. At the time of the inspection, the facility appeared to be
Properly operated and well maintained. The ORC and staff incorporate a comprehensive
process control program with all measurements being properly documented and maintained
on -site.
Bar Screens Yes No NA NE
Type of bar screen
a.Manual
b.Mechanical
Are the bars adequately screening debris? ❑ ❑ ❑
Is the screen free of excessive debris? 0 ❑ ❑ ❑
Is disposal of screening in compliance? 0 ❑ ❑ ❑
Is the unit in good condition? ❑ 0 ❑ ❑
Comment: Two manual bar screens. One for the influent from the city of Mount Holly and the second for
the influent of A&E industry. Screenings are disposed at the County Landfill. Mechanical fine
screen drum has been out of service. Solids and grit were observed in downstream
treatment units including the chlorine contact.
Equalization Basins
Is the basin aerated?
Is the basin free of bypass lines or structures to the natural environment?
Is the basin free of excessive grease?
Are all pumps present?
Are all pumps operable?
Are float controls operable?
Are audible and visual alarms operable?
Yes No NA NE
❑ ❑ ■ ❑
■ ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
■ ❑ ❑ ❑
■ ❑ ❑ ❑
❑ ❑ ■ ❑
Page# 5

Permit: NCO021156
Inspection Date: 04/30/2019
Equalization Basins
# Is basin size/volume adequate?
Owner - Facility: Mount Holly WWTP
Inspection Type: Compliance Evaluation
Comment: The equalization basin is equipped with three operational pumps.
Aeration Basins
Mode of operation
Type of aeration system
Is the basin free of dead spots?
Are surface aerators and mixers operational?
Are the diffusers operational?
Is the foam the proper color for the treatment process?
Does the foam cover less than 25% of the basin's surface?
Is the DO level acceptable?
Is the DO level acceptable?(1.0 to 3.0 mg/1)
Yes No NA NE
■ ❑ ❑ ❑
Yes No NA NE
Ext. Air
Surface
• ❑ ❑ ❑
• ❑ ❑ ❑
❑ ❑ ■ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
■ ❑ ❑ ❑
Comment: The facilitv had a maior failure to one of its three aeration basins. Aeration basin had a maior
failure several years ago. At the time of the failure the facility indicated that the basin will be
cleaned out and will be permanently out of service. However, the basin, since the failure, has
not been cleaned out of solids. Aeration Basin calculations by Willis Engineers indicate the
facility will be able to operate under it's normal load, 4 MGD. Lime is added on an as -needed
basis to maintain appropriate alkalinity/pH levels
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'/ of the sidewall depth)
• ❑ ❑ ❑
• ❑ ❑ ❑
❑ ■ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Comment: Both secondary clarifiers were operational and in service. At the time of the inspection
clarifier 4 weir had a low soot and needed maintenance.
Page# 6

Permit: NCO021156
Inspection Date: 04/30/2019
Owner - Facility: Mount Holly WWTP
Inspection Type: Compliance Evaluation
Pumps-RAS-WAS
Yes No NA NE
Are pumps in place?
0
❑
❑
❑
Are pumps operational?
0
❑
❑
❑
Are there adequate spare parts and supplies on site?
❑
❑
❑
Comment:
Disinfection -Gas
Yes No NA NE
Are cylinders secured adequately?
0
❑
❑
❑
Are cylinders protected from direct sunlight?
0
❑
❑
❑
Is there adequate reserve supply of disinfectant?
0
❑
❑
❑
Is the level of chlorine residual acceptable?
0
❑
❑
❑
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 (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- - )
1000-0016-6562
If yes, then when was the RMP last updated?
Comment:
De -chlorination
Yes No NA NE
Type of system ?
Gas
Is the feed ratio proportional to chlorine amount (1 to 1)?
0
❑
❑
❑
Is storage appropriate for cylinders?
0
❑
❑
❑
# Is de -chlorination substance stored away from chlorine containers?
0
❑
❑
❑
Comment:
Are the tablets the proper size and type? ❑ ❑ 0 ❑
Are tablet de -chlorinators operational? ❑ ❑ 0 ❑
Number of tubes in use?
Comment:
Flow Measurement - Effluent
Yes No NA NE
# Is flow meter used for reporting?
0
❑
❑
❑
Is flow meter calibrated annually?
0
❑
❑
❑
Is the flow meter operational?
0
❑
❑
❑
Page# 7

Permit: NCO021156 Owner - Facility: Mount Holly WWTP
Inspection Date: 04/30/2019 Inspection Type: Compliance Evaluation
Flow Measurement - Effluent Yes No NA NE
(If units are separated) Does the chart recorder match the flow meter? 0 ❑ ❑ ❑
Comment: The flow meter is calibrated annually by ClearWater, Inc
Effluent Pipe
Yes No NA NE
Is right of way to the outfall properly maintained?
0 ❑
❑
❑
Are the receiving water free of foam other than trace amounts and other debris?
0 ❑
❑
❑
If effluent (diffuser pipes are required) are they operating properly?
❑ ❑
0
❑
Comment: The effluent appeared clear with trace suspended solids and no foam.
The receiving stream
did not appear to be negatively impacted by solids
Aerobic Digester
Yes No NA NE
Is the capacity adequate?
❑
0
❑
❑
Is the mixing adequate?
0
❑
❑
❑
Is the site free of excessive foaming in the tank?
0
❑
❑
❑
# Is the odor acceptable?
0
❑
❑
❑
# Is tankage available for properly waste sludge?
M
❑
❑
❑
Comment: Waste activated sludge is pumped into two (2) 750,000 gallon holding tanks equipped
for
storage and aeration. Bio-solids are land applied by a contracted company (Synagro)
under
the authority of Permit No. W00001863. At the time of the inspection the freeboard of one of
the two digesters was less than two feet.
Page# 8