NC0020338_Compliance Evaluation Inspection_20180802

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ROY COOPER NORTH CAROLINA
Governor Environmental Quality
MICHAEL S.REGAN
Secretary
LINDA CULPEPPER
Interim Director
August 2, 2018
Town of Yadkinville
Attn: Perry L. Williams, Town Manager
P.O. Drawer 816
Yadkinville, NC 27055-0816
RECEIVED/DENRJDWR
SUBJECT: Compliance Evaluation Inspection
Yadkinville Wastewater Treatment Plant AUG 14 2018
NPDES Permit# NC0020338
Yadkin County Water Resources
Permitting Section
Dear Mr. Williams,
On July 24, 2018, Ron Boone, Kelli Park, and Paul DiMatteo, of the Winston-Salem
Regional Office (WSRO) of the NC Division of Water Resources (DWR or the Division), along
with Chris McHugh, of the Environmental Protection Agency's (EPA) region 4 office, met with
Grant Trivette, operator in responsible charge (ORC) of Yadkinville's wastewater treatment plant
(VVWTP), to conduct a compliance evaluation inspection (CEI) of the facility. Mr. Trivette's
assistance and cooperation during the inspection were greatly appreciated. A CEI typically
consists of two distinct parts: an on-site inspection of the treatment facility and in-office file review.
The inspection results are summarized below and an inspection report is attached for your
records.
I. Permit
The discharge permit became effective on August 1, 2014 and expires on November 30, 2018.
Mr. Trivette had a current copy of the permit on-site during the inspection. The permit expires in
less than 180 days. The Division received the Town's application to renew the permit in April
2018.
II. Record/Reports
All required records and reports were readily available for inspection and were found to be
complete and current. This includes operator visitation logs, operation and maintenance logs,
DMRs, lab records and chains of custody, sludge management records, annual performance
reports, mercury minimization plans, flow monitoring records and calibration records, etc. No
problems, discrepancies, or violations were noted.
-1----.1 CV)
NORTH C�.
North Carolina Department of Environmental Quality I Division of Water Resources
Winston-Salem Regional Office 1450 Hanes Mill Road,Suite 300 I Winston-Salem,North Carolina 27103
336.776.9800

YadkinvillewWTP,8/1/18
Compliance Evaluation Inspection
Ill. Self-Monitoring Program
During the inspection, Mr. Boone reviewed discharge monitoring reports (DMR) ' and
corresponding laboratory reports, bench sheets, and chains of custody for the months of January
and April 2018. Mr. Boone noted no errors, deficiencies, or violations during this review. All
records were legible, well organized, and readily available for inspection. The permittee is
conducting all analyses required by the permit through their in-house lab (NC Laboratory
Certification#563)for all parameters except total nitrogen, total phosphorus, metals, and toxicity,
which are conducted by commercial laboratory Pace Analytical Services LLC, out of Huntersville,
NC (NC Laboratory Certification#12).
Prior to arriving for the inspection Mr. Boone also reviewed the plant's violation history over the
previous 12 months. No other violations were found on record.
A constant time/constant volume composite sampling regime is used for influent samples and
flow-proportional sampling is employed for effluent samples. Samples are stored at or below 6
degrees Celsius inside mechanically cooled units.
IV. Flow Measurement
The permittee measures and reports effluent flow using a Hydroranger Model 200 flow meter with
a Parshall flume. The effluent flow meter was last calibrated in September 2017. The
instantaneous flow rate readings from the outside meter and the chart recorder located inside the
administration building were compare and found to match very closely.
V. Operations & Maintenance
The plant appears to be very well operated and maintained. All treatment units are performing as
intended and there are no indications of poor operation and maintenance; although the clarifier
weir requires adjustment, as discussed below. Operators employ bound logbooks for scheduling
and recording completion of all operations and maintenance items and this appears to work well
for them.
VI. Facility Site Review
Evaluation of the physical plant reveal d it to be in very good condition. It appears to be kept very
clean and well maintained. It is curren ly undergoing a complete resurfacing/repainting.
The headworks were impressively lean with nearly no odor to speak of. Screenings are
dewatered and bagged automatically y the mechanical bar screen and grit is efficiently removed
by the vortex grit unit, resulting in a pr duct that appears to be nearly free of organic material. Bar
screenings and grit are both landfilled
Flow is pumped to the aeration basi . The mixed liquor is obviously quite healthy with a light
brown color and earthy, inoffensive o•or. Mr. Trivette stated that they maintain the mixed liquor
suspended solids (MLSS) concentrati•n at around 4,000 milligrams per liter(mg/I),which appears
to be optimum under normal circumst-noes.
2

Yadkinville WWTP,8/1/18
Compliance Evaluation Inspection .
The only problem noted during the on-site inspection was the secondary clarifier's weir is not
completely level. It appears to be higher on the north side and has two additional low spots, that
are each approximately two feet in length, located directly opposite of one another on the east
and west sides of the clarifier's center well. Although it is obvious that more flow is being drawn
over the low spots, no solids were being drawn through at the time of the inspection. The clarifier's
sludge blanket was relatively low,,however, only about two to three feet deep, or about 1/5 the
sidewall depth of 16 feet, which may explain, in part, why no solids were being drawn through the
low spots. Mr. Trivette indicated the weir's misalignment has never caused any known issues.
Still, the weir should be level to perform its designated function well without question. ,
From the clarifier wastewater flows to the chlorine contact chamber. The plant uses one-ton
chlorine and sulfur dioxide gas cylinders to chlorinate and dechlorinate the effluent, respectively.
The plant stores approximately 4,000 pounds of chlorine onsite at any given time so it has
developed and maintains Risk Management Plan (RMP) #1000-0004-3856, as required by the
Environmental Protection Agency (EPA).
Effluent flow is measured and pumped to the outfall, which is located approximately one-half mile
away from the plant, as the crow flies. The outfall is clear and readily accessible with stairs that
lead down to the outfall. It is marked as town property with appropriate signage. As suggested by
Mr. Hughes, the town may want to consider also marking the outfall as"non-potable" water, or as
the"treated effluent from the Yadkinville VVVVTP", although this is NOT specifically required by the
Division.
The plant has an automatically-activated stand-by diesel-powered 1,250-Kilowatt generator that
can power the entire plant. Generator maintenance is contracted and fuel is ordered as needed
from B&J Farm Supply, with a contingency for emergency fuel supply as needed.
4
VII.Effluent/Receiving Waters
Effluent was very clear, colorless, and odorless at the time of the inspection. No solids, foam, or
other adverse effects on the receiving stream were noted. Effluent is discharged to North Deep
Creek, which is located in sub-basin 03-07-02 of the Yadkin-Pee Dee river basin and is currently
classified as water supply IV(WS-IV)waters. The outfall is readily accessible and well maintained.
Upstream and downstream sampling is currently waived due to the permittee's membership in
the Yadkin-Pee Dee River Basin Association. Nevertheless, both sampling locations are known
and maintained in case membership ceases.
VIII. Sludge Maintenance & Handling
Waste sludge flows from the clarifier to an aerobic digester which also appears to be in very good
condition. The digester has two surface aerators and one mixer in the center. One mooring cable
for one of the aerators needs to be repaired. This is currently in the planning stages and does not
affect operations. Approximately 25,000 gallons of sludge is wasted per week. Approximately two
250,000 gallon loads of sludge per year are then hauled and land applied by Synagro under permit
WQ0001800.
3

Yadkinville WWTP,8/1/18
Compliance Evaluation Inspection
IX. Conclusion/Requested Actions
The efforts of the town and plant oper9tors to comply with all conditions of the NC0020338 NPDES
permit are noted and greatly appreciaated. However, please reply in writing to this letter within 30
calendar days of receiving it. Your vJritten reply should address each of the deficiencies and/or
violations noted above and provide a corrective action plan along with an estimated
implementation/completion schedule to remediate them. You are reminded that violations of
NPDES permit NC0020338, or the NO statutes and regulations under which it is promulgated, are
subject to fines of up to-$25,000 p4 day, per violation, as set forth in NC General Statute
(NCGS) 143-215.6A, Enforcement Procedures, Civil Penalties.
Your immediate attention is greatly appreciated. If you have any questions regarding the
inspection or this report, please contact Ron Boone or me at [phone], or by email at
ron.boone(ancdenr.gov or sherri.knight aC�ncdenr.gov.
Sincerely,
Sherri V. Knight, P.E.
Regional Supervisor
Water Quality Regional Operations
Division of Water Resources
Attachments: BIMS EPA Water Compliance Inspection Report
cc: Central Files
WSRO Files
{NPDES-Unit--
4

United States Environmental Protection Agency • Form Approved
E PA 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 �,J 2 I s 1 3 I NC0020338 111 12 1 18/07/24 117 18 L 19 1 s 1 201 1
21111111 1111111111111111111111111 11111111111 166
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA -Reserved
671 1 701LJ A I 711 1 72 I I I 731 1 174 751 I I 1 1 I I 180
Section B-Facility Data L�
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 00AM 18/07/24 14/08/01
Yadkinville WWTP
Exit Time/Date Permit Expiration Date
1620 Fred Hinshaw Rd
02 OOPM 18/07/24 18/11/30
Yadkinville NC 27055
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Grant Franklin Trivette/ORC/336-679-2184/
Name,Address of Responsible OfficiaVTitle/Phone and Fax Number
Contacted
Grant F Trivette,1620 Fred Hinshaw Rd Yadkinville NC 27055/ORC/336-679-2184/
No
Section C Areas Evaluated During Inspection(Check only those areas evaluated)
• Permit El Flow Measurement III Operations&Maintenance • Records/Reports
II Self-Monitoring Program El Sludge Handling Disposal U Facility Site Review NI 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
Ron Boone fi WSRO WQ//336-776-9690/
5(/4/ 3
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
,, t- r. t� ig
EPA Form 3560-3(Rev 9-94)Previous editions are obsolete
Page# 1

NPDES yr/mo/day Inspection Type 1
31 NC0020338 I11 121 18/07/24 1 17 18 i 2 i
LJ
Section D Summary of Finding/Comments(Attach additional sheets of narrative and checklists as necessary)
Please refer to the attached inspection summary letter.
•
.
Page# 2

Permit: NC0020338 Owner-Facility: YadkinvilleWWTP
Inspection Date: 07/24/2018 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 ❑ 0
application'?
Is the facility as described in the permit'? • ❑ ❑ 0
#Are there any special conditions for the permit? 0 II ❑ ❑
Is access to the plant site restricted to the general public'? • 0 0 ❑
Is the inspector granted access to all areas for inspection'? • ❑ ❑ ❑
Comment Renewal application received April 2018
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit'? • 0 0 ❑
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? • ❑ ❑ El
Is the chain-of-custody complete'? • ❑ ❑ ❑
Dates, times and location of sampling •
Name of individual performing the sampling U
Results of analysis and calibration U
Dates of analysis U
Name of person performing analyses •
Transported COCs •
Are DMRs complete do they include all permit parameters'? • ❑ 0 ❑
Has the facility submitted its annual compliance report to users and DWQ? • 0 ❑ ❑
(If the facility is=or>5 MGD permitted flow) Do they operate 24/7 with a certified operator 0 • ❑ ❑
on each shift'?
Is the ORC visitation log available and current'? • 0 ❑ ❑
Is the ORC certified at grade equal to or higher than the facility classification'? • 0 ❑ ❑
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'? • ❑ 0 ❑
Facility has copy of previous year's Annual Report on file for review'? MI 0 ❑ ❑
Comment None
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 ❑ ❑
Page# 3

Permit: NC0020338 Owner-Facility: Yadkinville VVVVTP
Inspection Date: 07/24/2018 Inspection Type• Compliance Evaluation
Laboratory Yes No NA NE
#Is the facility using a contract lab'? • 000
#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'? • 000
Incubator(BOD)set to 20 0 degrees Celsius+/-1 0 degrees'? • 000
Comment None
Influent Sampling Yes No NA NE
#Is composite sampling flow proportional'? 0 • 00
Is sample collected above side streams? • 000
Is proper volume collected'? • 000
Is the tubing clean'? • 000
#Is proper temperature set for sample storage(kept at less than or equal to 6 0 degrees • 000
Celsius)?
Is sampling performed according to the permit'? • 000
Comment None
Effluent Sampling Yes No NA NE
Is composite sampling flow proportional'? • 000
Is sample collected below all treatment units'? • 000
Is proper volume collected'? • 000
Is the tubing clean'? • 000
#Is proper temperature set for sample storage(kept at less than or equal to 6 0 degrees • 000
Celsius)?
Is the facility sampling performed as required by tt•e permit(frequency,sampling type • 000
representative)?
Comment None •
Upstream / Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit(frequency,sampling type, and ■ 000
sampling location)?
Comment None
Pump Station -Influent Yes No NA NE
Is the pump wet well free of bypass lines or structures'? • 000
Page# 4

Permit: NC0020338 Owner-Facility: Yadkinville VWVTP
Inspection Date: 07/24/2018 Inspection Type: Compliance Evaluation
Pump Station -Influent Yes No NA NE
Is the wet well free of excessive grease'? • 0 ❑ ❑
Are all pumps present'? • ❑ ❑ ❑
Are all pumps operable'? • 0 0 ❑
Are float controls operable'? • ❑ ❑ ❑
Is SCADA telemetry available and operational'? • ❑ ❑ ❑
Is audible and visual alarm available and operational'? • ❑ ❑ ❑
Comment: None '
Bar Screens Yes No NA NE
Type of bar screen
a.Manual 0
b.Mechanical •
Are the bars adequately screening debris'? • ❑ 0 ❑
Is the screen free of excessive debris'? I ❑ 0 ❑
Is disposal of screening in compliance'? • ❑ 0 ❑
Is the unit in good condition'? • ❑ ❑ ❑
Comment None
Grit Removal Yes No NA NE
Type of grit removal
a Manual ❑
b Mechanical III
Is the grit free of excessive organic matter'? - U ❑ ❑ ❑
Is the grit free of excessive odor? • 0 ❑ ❑
#Is disposal of grit in compliance'? • ❑ ❑ ❑
Comment None
,
Aeration Basins Yes No NA NE
Mode of operation Ext.Air
Type of aeration system Diffused
Is the basin free of dead spots'? • ❑ ❑ ❑
Are surface aerators and mixers operational'? • ❑ ❑ ❑
Are the diffusers operational'? • ❑ ❑ ❑
Page# 5

Permit: NC0020338 Owner-Facility: Yadkinville VVWTP
Inspection Date: 07/24/2018 Inspection Type: Compliance Evaluation
Aeration Basins Yes No NA NE
Is the foam the proper color for the treatment proc-ss? • 0 0 El
Does the foam cover less than 25%of the basin's urface? I 0 ❑ El
Is the DO level acceptable'? • 0 El El
Is the DO level acceptable?(1 0 to 3 0 mg/I) • ❑ ❑ El
Comment: None
Secondary Clarifier Yes No NA NE
Is the clarifier free of black and odorous wastewater'? • ❑ El El
Is the site free of excessive buildup of solids in ce ter well of circular clarifier'? • 0 El ❑
Are weirs level'? ❑ I El El
Is the site free of weir blockage'? • ❑ El El
Is the site free of evidence of short-circuiting'? ❑ I 0 El
Is scum removal adequate'? • ❑ ❑ ❑
Is the site free of excessive floating sludge? • El El ❑
Is the drive unit operational'? U 0 El El
Is the return rate acceptable(low turbulence)? • ❑ El El
Is the overflow clear of excessive solids/pin floc? , • El 0 ❑
Is the sludge blanket level acceptable'?(Approxim.tely Y4 of the sidewall depth) O ❑ El El
Comment: Weir is not completely level.
Pumps-RAS-WAS Yes No NA NE
Are pumps in place'? • 0 ❑ ❑
Are pumps operational'? • El El ❑
Are there adequate spare parts and supplies on s te? I ❑ El El
Comment: None
Disinfection-Gas Yes No NA NE
Are cylinders secured adequately? • ❑ ❑ ❑
Are cylinders protected from direct sunlight? • El 0 El
Is there adequate reserve supply of disinfectant'? • ❑ ❑ El
Is the level of chlorine residual acceptable'? El ❑ El •
Is the contact chamber free of growth, or sludge •uildup? • El ❑ El
Is there chlorine residual prior to de-chlorination'? ❑ 0 El •
Page# 6

Permit: NC0020338 Owner-Facility. Yadkinville WWTP
Inspection Date: 07/24/2018 Inspection Type: Compliance Evaluation
Disinfection-Gas Yes No NA NE
Does the Stationary Source have more than 2500 lbs of Chlorine(CAS No 7782-50-5)7 • ❑ ❑ ❑
If yes,then is there a Risk Management Plan on site'? • ❑ ❑ ❑
If yes,then what is the EPA twelve digit ID Number?(1000- - ) 1000-0004-3856
If yes,then when was the RMP last updated'?
Comment None
De-chlorination Yes No NA NE
Type of system? Gas
Is the feed ratio proportional to chlorine amount(1 to 1)'? 01100
Is storage appropriate for cylinders'? • ❑ ❑ ❑
#Is de-chlorination substance stored away from chlorine containers'? ❑ II ❑ ❑
Are the tablets the proper size and type'? ❑ ❑ MI ❑
Comment. More sulfur dioxide is typically used according to the operator.
Are tablet de-chlorinators operational'? ❑ ❑ • ❑
Number of tubes in use'?
Comment. None
Flow Measurement- Effluent Yes No NA NE
#Is flow meter used for reporting'? II ❑ ❑ ❑
Is flow meter calibrated annually'? • ❑ ❑ 0
Is the flow meter operational'? • ❑ ❑ ❑
(If units are separated) Does the chart recorder match the flow meter'? U ❑ 0 ❑
Comment None
Pump Station - Effluent Yes No NA NE
Is the pump wet well free of bypass lines or structures'? • ❑ 0 ❑
Are all pumps present'? • ❑ 0 ❑
Are all pumps operable'? • ❑ ❑ 0
Are float controls operable'? • 0 0 ❑
Is SCADA telemetry available and operational'? • ❑ ❑ ❑
Is audible and visual alarm available and operational'? • 0 ❑ 0
Comment None
Page# 7

Permit: NC0020338 Owner-Facility: Yadkinville WWTP
Inspection Date: 07/24/2018 Inspection Type: Compliance Evaluation
Effluent Pipe Yes No NA NE
Is right of way to the outfall properly maintained? • ❑ 0 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 None "
Aerobic Digester ' _ Yes No NA NE
Is the capacity adequate'? • 0 ❑ ❑
Is the mixing adequate'? • ❑ ❑ ❑
Is the site free of excessive foaming in the tank'? • ❑ ❑ ❑
#Is the odor acceptable'? • 0 0 ❑
#Is tankage available for properly waste sludge'? • ❑ ❑ ❑
Comment None
Drying Beds Yes No NA NE
Is there adequate drying bed space'? • ❑ ❑ ❑
Is the sludge distribution on drying beds appropriate'? ❑ ❑ ❑ •
Are the drying beds free of vegetation'? • ❑ ❑ ❑
#Is the site free of dry sludge remaining in beds'? • 0 ❑ ❑
Is the site free of stockpiled sludge'? • ❑ 0 ❑
Is the filtrate from sludge drying beds returned to the front of the plant'? U ❑ ❑ ❑
#Is the sludge disposed of through county landfill'? ❑ • ❑ ❑
#Is the sludge land applied'? • 0 ❑ ❑
(Vacuum filters) Is polymer mixing adequate'? ❑ ❑ I ❑
Comment The drying beds would only be used in emergency situations
Standby Power Yes No NA NE
Is automatically activated standby power available'? • ❑ ❑ ❑
Is the generator tested by interrupting primary pow r source'? • ❑ ❑ ❑
Is the generator tested under load'? II ❑ ❑ ❑
Was generator tested&operational during the insp ction? ❑ • ❑ ❑
Do the generator(s) have adequate capacity to opeate the entire wastewater site'? • ❑ ❑ ❑
Is there an emergency agreement with a fuel vendor for extended run on back-up power'? U ❑ ❑ ❑
Is the generator fuel level monitored'? U ❑ ❑ ❑
Page# 8

Permit: NC0020338 Owner-Facility: Yadkinville WWTP
Inspection Date: 07/24/2018 Inspection Type: Compliance Evaluation
Standby Power Yes No NA NE
Comment 1,250 KiloWatts
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping. • 0 0 0
Does the facility analyze process control parameters, for ex MLSS, MCRT, Settleable • 0 0 0
Solids, pH, DO, Sludge Judge, and other that are applicable'?
Comment. None
Page# 9