NC0025054_Historical information_20141231

February 27, 2014
Subject:
Dear Mr. Thomas:
This Authorization to Construct is issued in accordance with Part III, Paragraph A of
NPDES Permit No. NC0025054 issued April 1, 2010, and shall be subject to revocation unless
the wastewater treatment facilities are constructed in accordance with the conditions and
limitations specified in Permit No. NC0025054.
This authorization results in no increase in design or permitted capacity and is awarded
for the construction of the following specific modifications:
Pat McCrory
Governor
Installation of one (1) new IMG equalization tank with one (1) mixed flow induced
dilution fan, one (1) equalization tank flow meter, piping and controls; installation of
one (1) new equalization pump station consisting of two (2) maximum 3,000 GPM
submersible pumps with variable frequency drive, one (1) 50 GPM sump pump, piping
and other controls; in conformity with the project plans, specifications, and other
supporting data subsequently filed and approved by the Department of Environment and
Natural Resources.
John E. Skvarla, III
Secretary
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604
Phone: [phone] \ Fax: [phone]
Internet:: www.ncwaterqualitv.oro
An Equal Opportunity'Affirmalive Action Employer
Larry Thomas
Public Works Director
City of Oxford
P. O. Box 1307
Oxford, NC 27565
Authorization to Construct
A to C No. 025054A02
City of Oxford
Oxford WWTP
A letter of request for an Authorization to Construct was received December 4, 2013 by
the Division of Water Resources (Division), and final plans and specifications for the subject
project have been reviewed and found to be satisfactory. Authorization is hereby granted for the
construction of modifications to the existing 3.5 MGD Oxford WWTP, with discharge of treated
wastewater into Fishing Creek in the Tar-Pamlico River Basin.
HCDEHR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Water Quality Programs
Thomas A. Reeder
Director
In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those as may
be required by the Division, such as the construction of additional or replacement wastewater
treatment or disposal facilities.
The Raleigh Regional Office, telephone number (919) 791 - 4200, shall be notified at
least forty-eight (48) hours in advance of operation of the installed facilities so that an on site
inspection can be made. Such notification to the regional supervisor shall be made during the
normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State
Holidays.
Larry Thomas, Public Works Director
February 27, 2014
Page 2 of 3
The sludge generated from these treatment facilities must be disposed of in accordance
with G.S. 143-215.1 and in a manner approved by the Division.
Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of the
wastewater treatment facilities. The operator must hold a certificate of the type and grade at
least equivalent to or greater than the classification assigned to the wastewater treatment
facilities by the Certification Commission.
The Permittee must also employ a certified back-up operator of the appropriate type and
grade to comply with the conditions of T15A:8G.O2O2. The ORC of the facility must visit each
Class I facility at least weekly and each Class II, III and IV facility at least daily, excluding
weekends and holidays, must properly manage the facility, must document daily operation and
maintenance of the facility, and must comply with all other conditions of T15A:8G.O2O2.
During the construction of the proposed additions/modifications, the permittee shall continue to
properly maintain and operate the existing wastewater treatment facilities at all times, and in
such a manner, as necessary to comply with the effluent limits specified in the NPDES Permit.
You are reminded that it is mandatory for the project to be constructed in accordance
with the North Carolina Sedimentation Pollution Control Act, and when applicable, the North
Carolina Dam Safety Act. In addition, the specifications must clearly state what the contractor’s
responsibilities shall be in complying with these Acts.
A copy of the approved plans and specifications shall be maintained on file by the
Permittee for the life of the facility.
Upon completion of construction and prior to operation of this permitted facility, a
certification must be received from a professional engineer certifying that the permitted facility
has been installed in accordance with the NPDES Permit, this Authorization to Construct and the
approved plans and specifications. Mail the Certification to: NPDES Unit, DWR/DENR, 1617
Mail Service Center, Raleigh, NC 27699-1617.
Sincerely/
Thomas A. Reeder
cc:
Prior to entering into any contract(s) for construction, the recipient must have obtained all
applicable permits from the State.
Larry Thomas, Public Works Director
February 27,2014
Page 3 of 3
The issuance of this Authorization to Construct does not preclude the Permittee from
complying with any and all statutes, rules, regulations, or ordinances which may be imposed by
other government agencies (local, state, and federal) which have jurisdiction.
If you have any questions or need additional information, please contact Ron Berry at
telephone number [phone].
Without Engineer’s Certificate attached:
Granville County Health Department
DWI/Anita Reed (funded)
Marco R. Menendez, P.E.
Dewberry Engineers Inc.
2301 Rexwoods Drive
Suite 200
Raleigh, NC 27607-3366
DWR/ Raleigh Regional Office, Water Quality Programs
Central Files NC0025054
NPDES File NC0025054
Failure to abide by the requirements contained in this Authorization to Construct may
subject the Permittee to an enforcement action by the Division in accordance with North
Carolina General Statute 143-215.6Ato 143-215.6C.
Engineer's Certification
Signature Registration No.
Date
Mail this Certification to:
I certify that the construction of the above referenced project was observed to be built within
substantial compliance, intent and in conformity with all applicable regulations and statutes and
the project plans, specifications, and other supporting documentation comprising the
Authorization to Construct Permit Application package.
City of Oxford
Oxford WWTP
Authorization to Construct No. 025054A02
Issued February 27, 2014
Installation of one (1) new IMG equalization tank with one (1) mixed flow induced
dilution fan, one (1) equalization tank flow meter, piping and controls; installation of one
(1) new equalization pump station consisting of two (2) maximum 3,000 GPM submersible
pumps with variable frequency drive, one (1) 50 GPM sump pump, piping and other
controls; in conformity with the project plans, specifications, and other supporting data
subsequently filed and approved by the Department of Environment and Natural
Resources.
Attn: Ron Berry
Complex Permitting Unit
DENR/DWR/Water Quality Programs
1617 Mail Service Center
Raleigh, NC 27699-1617
I, as a duly registered Professional Engineer in
the State of North Carolina, having been authorized to observe (periodically/weekly/full time)
the construction of the modifications and improvements to the Oxford Wastewater Treatment
Plant, located in Granville County, hereby state that, to the best of my abilities, due care and
diligence was used in the observation of the following construction:
April 4, 2014
Subject:
Dear Mr. Thomas:
Parameter/Outfall Date Limit Value
01/31/14 2 mg/1Nitrogen, Ammonia Total
(as N) - Concentration
The Division of Water Resources has reviewed Oxford WWTP's monitoring report for January
2014 and we noted the following violation(s) had been reported:
A Notice of Violation/Notice of Recommendation for Enforcement (NOV/NRE) is being issued
for the noted violation of North Carolina General Statute (G.S.) 143-215.1 and the subject
NPDES Permit. Pursuant to G.S. 143-215.6A, a civil penalty of not more than twenty-five
thousand dollars ($25,000.00) may be assessed against any person who violates or fails to act in
accordance with the terms, conditions, or requirements of any permit issued pursuant to G.S.
143-215.1. If you wish to provide additional information regarding the noted violation, please
submit it within 10 days of receipt of this Notice. Your response should be mailed to Danny
Smith at the below listed letterhead address. A review of your response will be considered in the
enforcement/assessment decision process along with any information provided on the Discharge
Monitoring Report.
Pat McCrory
Governor
Remedial actions, if not already implemented, should be taken to correct any problems. The
Division of Water Resources may pursue enforcement actions for this and any additional
violations. If the violations are of a continuing nature, not related to operation and/or
John E. Skvarla, III
Secretary
NOTICE OF VIOLATION AND RECOMMENDATION FOR
ENFORCEMENT
Permit No. NC0025054
Oxford WWTP
Case No. NOV-2014-LV-0147
Granville County
Larry Thomas, Public Works Director
City of Oxford
PO Box 506
Oxford NC 27565
CERTIFIED MAIL 7012047000013843
RETURN RECEIPT REQUESTED
Reported Value
2.4 mg/1
Limit Type
Monthly Average
Exceeded
HCDEHR
North Carolina Department of Environment and Natural Resources
NorthCarolina
NaturallyNorth Carolina Division of Water Resources 1628 Mail Service Center Raleigh, NC 27699-1628 Phone [phone]
Internet: www.ncwaterqualitv.org Location: 3800 Barrett Drive Raleigh, NC 27609 Fax [phone]
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
2
Sincerely,
L
maintenance problems, and you anticipate remedial construction activities, you may wish to
consider applying for a Special Order by Consent. You may contact this office for additional
information.
If you have any questions regarding this notice or need additional information, please contact
Cheng Zhang at 919-791-4200.
xc: Central Files
RRO SWP files
Danny Smith/
Regional Supervisor
Raleigh Regional Office
October 8, 2014
Oxford NC 27565
Subject:
Dear Mr. Thomas:
Parameter Date Limit Value
DO, Oxygen, Dissolved 5/16/2014 5.00 mg/1
myself at 919-791-4200.
North Carolina Division of Water Resources 1628 Mail Service Center
Internet: www.ncvvaterqualitv.org Location: 3800 Barrett Drive
Pat McCrory
Governor
John E. Skvarla, III
Secretary
NOTICE OF DEFICIENCY
Permit No. NC0025054
Oxford WWTP
Case No. NOD-2014-LV-0094
Granville County
xc: Central Files
RRO SWP files
Larry Thomas, Public Works Director
City of Oxford
PO Box 506
One NorthCarolina— Naturally
Customer Service
1-877-623-6748
Raleigh, NC 27699-1628 Phone [phone]
Raleigh, NC 27609 Fax [phone]
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
NCDENR -/?/W
North Carolina Department of Environment and Natural Resources
The Division of Water Resources has reviewed Oxford WWTP's monitoring report for May 2014
and we noted the following violation s) had been reported:
Reported Value
4.40 mg/1
Limit Type
Daily Minimum Not
Reached
Remedial actions should be taken to correct the cause(s) of this violation. The violations described
above should be abated immediately and properly resolved.
Thank you for your attention to this matter. This office requires that the violations as described
above be properly resolved. Unresolved violations may lead to the issuance of a Notice of
Violation and/or assessments of civil penalties.
If you have any questions or require any additional information, please contact Cheng Zhang at or n Sincerely,
Danny Sipith
Regional Supervisor
Raleigh Regional Office
II.
TRC SETTTEMPDOSC
y
Yes No
Yes No
S Yes No
No
Yes No
3 Temperature (TEMP)
Dissolved Oxygen (DO)
H ■
Ej Yes
Region^hspectors’ Checklist for Fie®Parameters
D I A
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
Are the following items documented (a/ where applicable):
PH
(/
y
1/
S' Yes
3 Yes
3 Yes
a Yes
Item __________-
Date of sample collection*_________
Time of sample collection*_________
Sample collector’s initials or signature
Date of sample analysis*__________
Time of sample analysis*__________
Analyst initials or signature________
Sample location_________________
‘Date and time of sample collection and analysis may be the same for in situ or on-site measurements.
General Laboratory (note any exceptions in section XI)________________
Are instruments, meters, probes, photometric cells, etc, maintained in good condition?
Are standards, reagents and consumables used within manufacturer expiration dates?
[TRC gel standard is exempt]
III. Total Residual Chlorine____________________________________ _
Total Residual Chlorine meter make and model:________________________________
Is a check standard analyzed each day of use? (Circle one: gel or liquid standard)______
What is the assigned/observed value of the daily check standard?___________________
Is a 5-point calibration verification performed? Note date of last verification:____________
Alternatively, does the lab construct a linear regression, using 5 standards, to calculate
results? Note date of last calibration curve constructed:___________________________
True values: pg/L mg/L
Obtained values: pg/L mg/L
What program are samples analyzed on?______________________________________
Are results reported in proper units? Check one: pg/L mg/L
Are results reported between the facility’s permit limit and the compliance limit of 50 pg/L?
If value is less than the low standard, report as “<x”, where x=low standard cone._______
Are samples analyzed within 15 minutes of collection?____________________________
IV. pH__________________________________________ ____________________
pH meter make and model: il ol
Is the pH meter calibrated with at least 2 buffers per mfg’s instructions each day of use?
Note buffers used:________________________________________________________
Is the pH meter calibration checked with an additional buffer each day of use? Note check
buffer used: "7. O______________________________________________________
Does the check buffer read within ±0.1 S.U. of the known value?____________________
Are the following items documented:__________________________________________
Meter calibration?_______________________________________________________
Check buffer reading?___________________________________________________
Are samples analyzed within 15 minutes of collection?____________________________
Are sample results reported to 0.1 pH units?
Yes No
Yes No
Facility Name: IaJ i
NPDES#:
Field Lab Certification #: ^>2-/
Lab Contact: [4 f rx
I.
Total Residual Chlorine (TRC)
S PH
Regional Plant Inspector:
Regional Inspector Contact #: (^/^ J ~7 S7/
Region: _________________________
Date: h/ / -7 / 2^0 >
Check the parameter(s) performed at this site for reporting purposes.
Specific Conductivity (SC)
Settleable Residue (SETT)
H Yes No
K] Yes No
g] Yes No
Yes No
Yes No
Yes
X.
XI.Additional comments:
Electronic copies may be emailed to [e-mail].
Revision 04/20/2012
Please submit a copy of this completed form to the Laboratory Certification program at:
DWQ Lab Certification, Chemistry Lab, Courier # 52-01-01
Yes E No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
'□ No
No
No
No
No
No
No
No
No
No
Yes No
No
No
Zl Yes
Yes
Yes
ZJ Yes
Yes
Yes

3 Yes
Yes
3 Yes
V. Temperature_____________ _______________________
What instrument(s) is used to measurSemperature? Check all that apply:
, , , _"^^Teter^
[Xl DO meter Conductivity meter Digital thermometer Glass thermometer
Is the instrument/thermometer calibration checked at least annually against a NIST
traceable or NIST certified thermometer?_____________________________________
Are temperature corrections (even if zero) posted on the instrument/thermometer?_____
Are samples measured in situ or on-site? [REQUIRED - there is no holding time for
temperature]_______________________
Are sample results reported in degrees C?____________________________________
VI. Dissolved Oxygen______________________________ __________________
DO meter make and model: /-/ A /-j & 2 & d
Is the air calibration of the DO meter performed each day of use?__________________
Are the following items documented:_________________________________________
Meter calibration?________________________
Are samples analyzed within 15 minutes of collection?___________________________
Are results reported in mg/L?_______________________________________________
VII. Conductivity_____________________________________________________
Conductivity meter make and model:_________________________________________
Is the meter calibrated daily according to the manufacturer’s instructions? Note standard
used (this is generally a one-point calibration):_________________________________
Is a daily check standard analyzed? Note value:________________________________
Are the following items documented:_________________________________________
Meter calibration?______________________________________________________
Are samples analyzed within 28 days of collection?_____________________________
Are results reported in pmhos/cm (some meters display equivalent pS/cm units)?______
VIII. Settleable Residue _________________ " _______________
Does the laboratory have an Imhoff Cone in good condition?______________________
Is the sample settled for 1 hour?____________________________________________
Is the sample agitated after 45 minutes?______________________________________
Are the following items documented:_________________________________________
Volume of sample analyzed? Note volume analyzed:__________________________
Date and time of sample analysis (settling start time)?_________________________
Time of agitation after 45 minutes of settling?________________________________
Sample analysis completion (settling end time)?______________________________
Are samples analyzed within 48 hours of collection?_____________________________
Are results reported in ml/L?_______________________________________________
IX. Was a paper trail (comparing contract lab and on-site data to DMR)
_____performed? If so, list months reviewed:_______________________________
Is follow-up by the Laboratory Certification program recommended?
December 3, 2014
Subject:
Dear Ms. Ratliff:
Pat McCrory
Governor
Oxford WWTP is permitted to discharge at a rate of 3.5 MOD and consist of: mechanical bar screen,
mechanical aerated grit removal, influent wet well with three submersible pumps, influent flow­
measurement device (Parshall flume), tow three-stage oxidation ditches featuring anaerobic, anoxic,
and aerobic zones, three center-feed secondary clarifiers, ultraviolet disinfection, post aeration basin,
sludge thickeners, and aerobic digester. The plant discharges to Fishing Creek, which is classified C-
NSW waters in the Tar-Pamlico River basin.
2. All primary, secondary, and tertiary treatment and post-treatment processes were in good
operational condition. Construction of the new 1 million-gallon equalization basin and related
pump station was underway.
John E. Skvarla, III
Secretary
1. Current permit expired on January 31, 2014. Renewal application was submitted to and received
by the Division on July 23, 2013, which is still in review by the Division. As described in
previous inspection letter, following treatment units shall be added in the facility description
in the new permit: dual traveling bridge type sand filters, two return activated sludge
(RAS) pump stations, two thickened sludge storage lagoons, effluent flow meter, and
standby generator. The receiving stream shall be unnamed tributary to Fishing Creek.
Ms. Amy Ratliff, P.E.
City Engineer
City of Oxford
PO Box 1307
Oxford, NC 27565
Compliance Evaluation Inspection
Oxford WWTP
Permit No. NC0025054
Granville County
On November 17, 2014, Cheng Zhang and Jason Robinson of the Raleigh Regional Office (RRO)
conducted a compliance evaluation inspection of the subject facility. The assistance of Mr. Dennis
Wilson, Superintendent and operator in responsible charge (ORC) of the facility, was appreciated as it
facilitated the inspection process. The inspection report is attached. The following observations were
made:
NCDEHR
North Carolina Department of Environment and Natural Resources
NorthCarolina----------------------------------------------------------------------------Naturally
North Carolina Division of Water Resources 1628 Mail Service Center Raleigh, NC 27699-1628 Phone [phone]
Internet: www.ncwaterquality.org Location: 3800 Barrett Drive Raleigh, NC 27609 Fax [phone]
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
3.
4.
5.
6.
Cc: Central Files w/attachment
Raleigh Regional Office w/attachment
Dennis Wilson - City of Oxford w/attachment
Jason Robinson - RRO w/attachment
The facility has three aerobic sludge digesters and two sludge holding lagoons, which have
adequate capacity to handle wasted sludge. Synogro hauls about 2 million-gallon of class-B
biosolids from the facility in July 2014for land application.
The ORC maintains a daily logbook. Lab results, chain-of-custody forms, and DMRs were
complete and current, kept in good order and ready for review. May 2014 DMR data were
compared to lab bench sheets; no data transcription errors were noted during the inspection.
The right of way to the outfall was well maintained. The effluent was observed to be clear and
free of solids. No visible impacts were noted immediately downstream the effluent pipe.
Field lab parameter (Certificate No. 621) calibration and analysis records were reviewed during
the inspection.
Danny Sm
Water Quality Regional Supervisor
Raleigh Regional Office
Compliance Evaluation Inspection
Oxford WWTP
Permit No. NC0025054
nncere.
! /
Attachments
Compliance Inspection Report
The overall condition of Oxford WWTP is compliant with Division standards. If you have any
questions regarding the attached reports or any of the findings, please contact Cheng Zhang at: (919)
791-4200 (or email: [e-mail]).
EPA
Section A: National Data System Coding (i.e., PCS)
Inspection Typeyr/mo/dayNPDES
NC0025054 14/11/17
2ii 11111 111111111111111111 i 111111 11111111111 r6
Bl Reserved-
71 80I733N
Section B: Facility Data
Entry Time/Date Permit Effective Date
10/04/0109:30AM 14/11/17
Oxford WWTP
Exit Time/Date
NCSR 1649
14/11/1712:00PMOxford NO 27565
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)Other Facility Data
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Randy Hernan,PO Box 506 Oxford NO 27565//252-883-9220/9196031138
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
DateAgency/Office/Phone and Fax NumbersName(s) and Signature(s) of Inspector(s)
1Page#
J11
9 Permit
Self-Monitoring Program
Laboratory
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
POTW name and NPDES oermit Number)
Jason T Robinson
Cheng Zhang
fl Flow Measurement
fl Sludge Handling Disposal
RRO WQ///
RRO WQ//919-791-4200/
fl Operations & Maintenance
fl Facility Site Review
Records/Reports
Effluent/Receiving Waters
Permit Expiration Date
14/01/31
///
Dennis McCoy Wilson/ORC/919-693-8783/
United States Environmental Protection Agency
Washington, D.C. 20460
Water Compliance Inspection Report
Form Approved.
OMB No. 2040-0057
Approval expires 8-31-98
Facility Self-Monitoring Evaluation Rating
70
[nJ
Date
Inspection Work Days
671
121
Transaction Code
1
Fac Type
20U
Signaturaof Management Q ^Reviewer / Agency/Office/Phone and Fax Numbers
CPA Form 3560^(Rev 9-94) Previous editions are obsol^e.
J17
uj74 75i 111111 i
31 18[c]
Inspector
19 L±J2 Id
QA
72
Oxford VWVTPPermit: NC0025054
Inspection Type:Inspection Date: 11/17/2014
Operations & Maintenance Yes No NA NE
■ Is the plant generally clean with acceptable housekeeping?
■
The facility analyzed MLSS, settleable solids, pH, DO and sludge judge for process control.Comment:
Permit Yes No NA NE
■
■ 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:
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?
■ Is disposal of screening in compliance?
Is the unit in good condition?
The manual bar screen serves as backup.Comment:
Grit Removal Yes No NA NE
Type of grit removal
a.Manual
b.Mechanical
■ Is the grit free of excessive organic matter?
■ Is the grit free of excessive odor?
■ # Is disposal of grit in compliance?
Comment:
3Page#
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable
Solids, pH, DO, Sludge Judge, and other that are applicable?
(If the present permit expires in 6 months or less). Has the permittee submitted a new
application?
Current permit expired on January 31, 2014. Renewal application was submitted to and
received by the Division on July 23, 2013, which is still in review.
Owner - Facility:
Compliance Evaluation
Oxford WWTP
Compliance Evaluation
Flow Measurement - Influent Yes No NA NE
■ # 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?
Comment:
Pump Station - Influent Yes No NA NE
Is the pump wet well free of bypass lines or structures?
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?
An one MGD equaliztion basin and related pump station were under constructionComment:
Influent Sampling Yes No NA NE
■ # Is composite sampling flow proportional?
■ Is sample collected above side streams?
■ Is proper volume collected?
■ Is the tubing clean?
■
■ Is sampling performed according to the permit?
Comment:
Oxidation Ditches Yes No NA NE
■ Are the aerators operational?
■ Are the aerators free of excessive solids build up?
■ # 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?
■ Are settleometer results acceptable (> 30 minutes)?
■ Is the DO level acceptable?(1.0 to 3.0 mg/l)
4Page#
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
Celsius)?
Owner - Facility:
Inspection Type:
Permit: NC0025054
Inspection Date: 11/17/2014
Oxford WWTP
Compliance Evaluation
Oxidation Ditches Yes No NA NE
Are settelometer results acceptable?(400 to 800 ml/l in 30 minutes)
Two three-stage BNR units were operational well.Comment:
Nutrient Removal Yes No NA NE
■ # Is total nitrogen removal required?
■ # Is total phosphorous removal required?
BiologicalType
■ # Is chemical feed required to sustain process?
■ Is nutrient removal process operating properly?
No chemical feed is neededComment
Secondary Clarifier Yes No NA NE
■ 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)
The ORC intends to keep the sludge blanket to less than 1 foot.Comment:
Filtration (High Rate Tertiary)Yes No NA NE
Down flowType 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?
5Page#
Owner - Facility:
Inspection Type:
Permit: NC0025054
Inspection Date: 11/17/2014
Oxford WWTP
Compliance Evaluation
Filtration (High Rate Tertiary)Yes No NA NE
Two traveling bridge filters.Comment:
Disinfection - UV Yes No NA NE
■ Are extra UV bulbs available on site?
■ Are UV bulbs clean?
■ Is UV intensity adequate?
■ Is transmittance at or above designed level?
■ Is there a backup system on site?
■ Is effluent clear and free of solids?
Two banks of UV, each with 40 bulbs, one in service, the other as backupComment:
Flow Measurement - Effluent Yes No NA NE
■ # 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?
Comment:
Pumps-RAS-WAS Yes No NA NE
■ Are pumps in place?
■ Are pumps operational?
■ Are there adequate spare parts and supplies on site?
Two RAS pump stations, each with duplex pumps.Comment:
Effluent Sampling Yes No NA NE
■ Is composite sampling flow proportional?
■ Is sample collected below all treatment units?
■ Is proper volume collected?
■ Is the tubing clean?
■
■
Comment:
6Page#
# 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)?
Owner - Facility:
Inspection Type:
Permit: NC0025054
Inspection Date: 11/17/2014
Effluent Sampling Yes No NA NE
Laboratory Yes No NA NE
■ 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?
■
■ Incubator (Fecal Coliform) set to 44.5 degrees Celsius*/- 0.2 degrees?
Incubator (BOD) set to 20.0 degrees Celsius +/-1.0 degrees?
Comment:
Record Keeping Yes No NA NE
■ 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?
■
■ 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?
Comment:
7Page#
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
Celsius)?
(If the facility is = or > 5 MOD permitted flow) Do they operate 24/7 with a certified operator
on each shift?
Owner - Facility:
Inspection Type:
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■
■
■
■
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Permit: NC0025054
Inspection Date: 11/17/2014
Oxford WWTP
Compliance Evaluation
The facility analyzes temperature, DO, pH, TSS, and fecal. All other parameters are
analyzed by contract lab.
Oxford WWTP
Compliance Evaluation
Effluent Pipe Yes No NA NE
■ Is right of way to the outfall properly maintained?
■ Are the receiving water free of foam other than trace amounts and other debris?
■ If effluent (diffuser pipes are required) are they operating properly?
Comment:
Aerobic Digester Yes No NA NE
■ 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?
Three aerobic digesters, all in operation.Comment:
Standby Power Yes No NA NE
■ 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?
■ Do the generator(s) have adequate capacity to operate the entire wastewater site?
Is there an emergency agreement with a fuel vendor for extended run on back-up power?
■ Is the generator fuel level monitored?
Comment:
Lagoons Yes No NA NE
FacultativeType of lagoons?
2# Number of lagoons in operation at time of visit?
MulticellAre lagoons operated in?
■# Is a re-circulation line present?
■ Is lagoon free of excessive floating materials?
# Are baffles between ponds or effluent baffles adjustable?
■ Are dike slopes clear of woody vegetation?
■ Are weeds controlled around the edge of the lagoon?
■ Are dikes free of seepage?
8Page#
Owner - Facility:
Inspection Type:
Permit: NC0025054
Inspection Date: 11/17/2014
Oxford WWTPPermit: NC0025054
Inspection Type:Inspection Date: 11/17/2014
Lagoons Yes No NA NE
■ Are dikes free of erosion?
■ Are dikes free of burrowing animals?
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■ # If excessive algae is present, has barley straw been used to help control the growth?
■ Is the lagoon surface free of weeds?
■ Is the lagoon free of short circuiting?
Comment:
9Page#
# Has the sludge blanket in the lagoon (s) been measured periodically in multiple
locations?
Two sludge lagoons were both in use and with adequate capacity to hold thickened sludge
from digesters. Synogro hawled two million gallons of thicked solids for land application in
July 2014.
Owner - Facility:
Compliance Evaluation