NC0085359_Compliance Evaluation Inspection_20170406

Water Resources
Environmental Quality
April 6, 2017
Mr. Edward Goscicki, PE
Union County Department of Public Works
500 North Main Street, Suite 600
Monroe, NC 28112
SUBJECT: Compliance Evaluation Inspection
Twelve Mile Creek WWTP
NPDES Permit NCO085359
Union County, NC
Dear Mr. Goscicki:
ROY COOPER
Governor
MICHAEL S. REGAN
Secretory
S. JAY ZIMMERMAN
Director
RECEIVEDINC®EUDWR
APP -1 0 7011
pard iflossullor
On April 3, 2017, Roberto Scheller of this Office conducted a compliance inspection at the
subject facility. This inspection was conducted as a Compliance Evaluation Inspection (CEI) to
insure compliance with permit requirements and conditions. At the time of inspection facility
appeared to be well maintained and operated. We wish to thank you and the operating staff for
assistance regarding this inspection.
The enclosed report should be self-explanatory; however, should you have any questions, please
do not hesitate to contact myself or Roberto Scheller at [phone] or
[e-mail].
Sincerely,
W. Corey Basinger, Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ
Enclosed
cc: Henry Eudy, ORC, email: [e-mail]
Wastewater- Branch
File
—:7 --Nothing Compares::--,.
State of North Carolina I Environmental Quality
1611 Mail Service Center I Raleigh, North Carolina 27699-1611
919-707-9000

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 i, i 2 15 i 3 I NC0085359 I11 12 17/04/03 17 18 i i 19 i G i 201 I
21111111IIIIIIIIIIIIIIIIIIIIIIIIIIIIIII11111 f6
Inspection Work Days Facility Self -Monitoring Evaluation Rating 131 QA - Reserved -----
67 70 JLJ j 71 L] 72 i �, i 731 I X 74 751 III I � 180
L-1 I I I
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 permit Number)
10:09AM 17/04/03
15/01/01
Twelve Mile Creek WWTP
Exit Time/Date
Permit Expiration Date
8299 Kensington Dr
Waxhaw NC 28173
01:29PM 17/04/03
19/12/31
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
Other Facility Data
Henry Harrison Eudy/ORC/980-214-5977/
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Edward Goscicki,500 N Main St -Ste 500 Monroe NC 281124730/Executive
Director/704-296-421217042964232 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
Roberto Scheller MRO WQ//252-946-6481/
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
W. Corey Basinger MRO WQ//704-235-2194/
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page#

NPDES yr/mo/day Inspection Type
31 NCO085359 I11 12 17/04/03 17 18 ICI
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Page#

Permit: NCO085359 Owner - Facility: Twelve Mile Creek WWTP
Inspection Date: 04/03/2017 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?
❑
N
❑
❑
# 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?
N
❑
❑
❑
Comment: Sand filters have been removed and replaced with fabric filters. Current permit expires on
December 31, 2019.
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?
■
❑
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❑
Are all records maintained for 3 years (lab. reg. required 5 years)?
E
❑
❑
❑
Are analytical results consistent with data reported on DMRs?
0
❑
❑
❑
Is the chain -of -custody complete?
0
❑
❑
❑
Dates, times and location of sampling
available for review.
Name of individual performing the sampling
Results of analysis and calibration
Dates of analysis
Name of person performing analyses
❑
Transported COCs
N
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 24/7 with a certified operator
N
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on each shift?
Is the ORC visitation log available and current?
E
❑
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Is the ORC certified at grade equal to or higher than the facility classification?
E
❑
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Is the backup operator certified at one grade less or greater than the facility classification?
■
❑
❑
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Is a copy of the current NPDES permit available on site?
E
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Facility has copy of previous year's Annual Report on file for review?
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N
Comment: DMR's reviewed from 3-2015 to 11-2016 reporting errors noted for correction.
Records were
available for review.
Influent Sampling
# Is composite sampling flow proportional?
Yes No NA NE
0 ❑ ❑ ❑
Page# 3

Permit: NC0085359 Owner -Facility: Twelve Mile Creek WWTP
Yes No NA NE
Type of bar screen
Inspection Date: 04/03/2017 Inspection Type: Compliance Evaluation
a.Manual
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Influent Sampling
Yes No NA NE
Is sample collected above side streams?
b.Mechanical
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Is proper volume collected?
0
❑
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Is the tubing clean?
N
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# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
N
❑
❑
❑
Celsius)?
Is the unit in good condition?
E
❑
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Is sampling performed according to the permit?
N
❑
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Comment: Influent sampler appeared in good condition with sample storage temperature noted at 4
degree C.
Bar Screens
Yes No NA NE
Type of bar screen
a.Manual
❑
b.Mechanical
Are the bars adequately screening debris?
❑
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Is the screen free of excessive debris?
N
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Is disposal of screening in compliance?
0
❑
❑
❑
Is the unit in good condition?
E
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Comment: Bar screen was in operation at time of inspection and appeared to be veru
marginal in
screening debris removal. Debris is removed for disposal at county landfill.
Pump Station - Influent
Yes No NA NE
Is the pump wet well free of bypass lines or structures?
0
❑
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Is the wet well free of excessive grease?
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0
Are all pumps present?
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Are all pumps operable?
E
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Are float controls operable?
E
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Is SCADA telemetry available and operational?
N
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Is audible and visual alarm available and operational?
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E
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Comment:
Grit Removal
Type of grit removal
a.Manual
b.Mechanical
Yes No NA NE
El
0
Page# 4

U
Permit: NCO085359
Inspection Date: 04/03/2017
Owner - Facility: Twelve Mile Creek WVVTP
Inspection Type: Compliance Evaluation
Are the aerators operational?
N
❑
Grit Removal
Yes No NA NE
Is the grit free of excessive organic matter?
0
❑
❑
❑
Is the grit free of excessive odor?
N
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# Is disposal of grit in compliance?
E
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Comment: Grit is disposed of in County Landfill.
Oxidation Ditches
Yes No NA NE
Are the aerators operational?
N
❑
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Are the aerators free of'excessive solids build up?
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?
0
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Is the DO level acceptable?
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Are settleometer results acceptable (> 30 minutes)?
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Is the DO level acceptable?(1.0 to 3.0 mg/1)
0
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Are settelometer results acceptable?(400 to 800 ml/I in 30 minutes)
0
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Comment: Three of four oxidation ditches were in operation.
One ditch was down for construction.
Eash train is equiped with anaerobic and anoxic zones. It was noted that rags and debris
was collecting on mixers.
Nutrient Removal
# Is total nitrogen removal required?
# Is total phosphorous removal required?
Type
# Is chemical feed required to sustain process?
Is nutrient removal process operating properly?
Comment: Sodium aluminate added at secondary clarifier for phosphorus removal.
Chemical Feed
Is containment adequate?
Is storage adequate?
Are backup pumps available?
Is the site free of excessive leaking?
Comment:
Secondary Clarifier
Yes No NA NE
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M
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Chemical
•
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•
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Yes No NA NE
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Yes No NA NE
Page# 5

Permit: NC0085359 Owner - Facility:
Inspection Date: 04/03/2017 Inspection Type:
Twelve Mile Creek WVVTP
Compliance Evaluation
•
few suspended sloids. Effluent from #1 and #2 Clarifiers was clear with few suspended
Secondary Clarifier
Yes No NA NE
Is the clarifier free of black and odorous wastewater?
0
❑
❑
❑
Is the site free of excessive buildup of solids in center well of circular clarifier?
E
❑
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Are weirs level?
N
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Is the site free of weir blockage?
0
❑
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Is the site free of evidence of short-circuiting?
N
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, ❑
Is scum removal adequate?
0
❑
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0
Is the site free of excessive floating sludge?
E
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Is the drive unit operational?
0
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Is the return rate acceptable (low turbulence)?
N
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Is the overflow clear of excessive solids/pin floc?
E
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Is the sludge blanket level acceptable? (Approximately'/4 of the sidewall depth)
0
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. ❑
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Comment: Three of four secondary clarifiers were in operation.
Effluent from #5 Clarifier was clear with
•
few suspended sloids. Effluent from #1 and #2 Clarifiers was clear with few suspended
❑
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•
solids.
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M
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Pumps -RAS -WAS
Yes No NA NE
Are pumps in place?
0
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Are pumps operational?
0
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Are there adequate spare parts and supplies on site?
0
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Comment:
Filtration (High Rate Tertiary)
Type of operation:
Is the filter media present?
Is the filter surface free of clogging?
Is the filter free of growth?
Is the air scour operational?
Is the scouring acceptable?
Is the clear well free of excessive solids and filter media?
Yes No NA NE
Cross flow
•
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•
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M
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M
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M
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M
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Comment: Sand filters removed and replaced with drum filters. Efflunt clear with no visible suspended
solids.
Disinfection - UV
Are extra UV bulbs available on site?
Are UV bulbs clean?
Yes No NA NE
N ❑ ❑ ❑
■ ❑ ❑ ❑
Page# 6
0

Permit: NCO085359
Owner - Facility: Twelve Mile Creek WwrP
# Is flow meter used for reporting?
0 ❑
❑
Inspection Date: 04/03/2017
Inspection Type: Compliance Evaluation
0 ❑
❑
❑
Disinfection - UV
Yes No NA NE
Is UV intensity adequate?
❑
❑
❑
E
Is transmittance at or above designed level?
0
❑
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❑
Is there a backup system on site?
0
❑
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Is effluent clear and free of solids?
0
❑
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Comment: 2 UV units on site with the older of the two units being used as back up.
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 ❑
❑
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(If units are separated) Does the chart recorder match the flow meter?
❑ ❑
❑
0
Comment: Facility is equiped with rectangular weir and ultra sonic flow meter. It ws noted that flow is
❑
❑
passing under weir plate Operator indicated that flow measurment structure is scheduled
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
0
for replacement as part of construction upgrades to plant.
❑
❑
Celsius)?
Effluent Sampling
Yes No NA NE
Is composite sampling flow proportional?
❑
❑
❑
Is sample collected below all treatment units?
0
❑
❑
❑
Is proper volume collected?
E
❑
❑
❑
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
N
❑
❑
❑
representative)?
Comment: Effluent sampler appeared to be well maintained with sample storage at 3 degrees C
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? ❑ ❑ ■ ❑
Comment: Effluent was clear with on visible suspended solids. Foam was being generated at
discharge but disipated within 50 downstream.
Upstream/ Downstream Sampling
Yes No NA NE
Page# 7

Permit: NCO085359 Owner - Facility: Twelve Mile Creek WWfP.
Inspection Date: 04/03/2017 Inspection Type: Compliance Evaluation
Upstream / Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit (frequency, sampling type, and E ❑ ❑ ❑
sampling location)?
Comment:
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?
E
❑
❑
❑
# Is the odor acceptable?
N
❑
❑
❑
# Is tankage available for properly waste sludge?
0
❑
❑
❑
Comment:
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping? E ❑ ❑ ❑
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable E ❑ ❑ ❑
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment:
Standby Power
Yes No NA NE
Is automatically activated standby power available?
N
❑
❑
❑
Is the generator tested by interrupting primary power source?
N
❑
❑
❑
Is the generator tested under load?
E
❑
❑
❑
Was generator tested & operational during the inspection?
❑
❑
❑
N
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?
0
❑
❑
❑
Is the generator fuel level monitored?
N
❑
❑
❑
Comment:
Page# 8
f