NC0082759_Compliance Evaluation Inspection_20180419

Way ROY COOPER
e, Govo no,
MICHAEL S REGAN
Secretary
Water Resources LINDA CULPEPPER
ENVIRONMENTAL QUALITY Interim Director
April 19, 2018
Mr. Jimmy Covington, President
Orange-Alamance Water System, Inc.
Post Office Box 187REcEAVEDI®ENRID
Mebane, NC 27302201$
APR 25
Water�eSSectton
Subject: Compliance Evaluation Inspection Permitting
Orange-Alamance Water Treatment Plant (WTP)
NPDES Permit No: NC0082759
Orange County
Dear Mr. Covington:
On March 21, 2016, Cheng Zhang of the Raleigh Regional Office (RRO) Division of Water Resources
conducted a Compliance Evaluation Inspection of the subject facility. The assistance and cooperation of
Mr. Dale Hamby, the Water Plant Supervisor, were very helpful and appreciated. A checklist of items is
enclosed with this letter. During the inspection the following items were noted:
1.) Orange-Alamance Water System is permitted to discharge treated backwash wastewater from
Orange-Alamance WTP into Eno River in the Neuse River Basin.
2.) Backwash wastewater treatment units include dechlorination (calcium thiosulfate solution), and two
lagoons.
3.) At the time of inspection, the calcium thiosulfate feed system appeared to be in operational
condition. The surface aerator in the lower lagoon was in operation. The outfall was found to be
maintained and accessible. The effluent was clear without solids.
4.) The operators maintain a visiting log at the plant. June 2017 DMR was reviewed against contract lab
and field lab results, no date transcriptional errors were noted.
5.) Field lab parameter(Certificate No. 5516) calibration and analysis records were reviewed during the
inspection. Following items were noted:
e Check buffer readings after pH meter calibrations have not been documented. To
ensure the meter calibration is valid, the meter needs to be checked against a check buffer
with known value. The readings should be within±0.1 S.U. of the known value, and these
readings must be recorded/documented in your daily calibration book.
Division of Water Resouices, Raleigh Regional Office, Water Quality Operations Section hap//portal nedenr org/web/wq/aps
1628 Mail Service Centel. Raleigh,NC 27699-1628 Phone [phone]
Location 3800 Barlett Drive, Raleigh,NC 27609 Fax (919)78S-7159

Orange-Alamance Water System
Orange-Alamance Water Treatment Plant
Permit No NC0082759
o Two of three pH buffers (4.0 S.0 and 10.0 S.U.) expired at the time of inspection.
e The facility has been reporting total residual chlorine (TRC) values measured with a method
that is not a Division approved method (with subtraction of manganese interference). In order
to remove the manganese interfering to quantify TRC, the reagents added should be
potassium iodide and sodium arsenite. For details of the method, please contact Anna
Ostendorff of DWR's Laboratory Certification Branch at [e-mail].
ncdenr.gov.
If you have any questions regarding the attached report or any of the findings, please contact Cheng
Zhang at: [phone] (or email: cheng.zhang(iD,ncdenr.gov).
Sincere y,
Danny Sm.th
Regional Supervisor
Raleigh Regional Office
Attachments: Compliance Inspection Report
Cc. Central Files w/attaclnnent
Raleigh Regional Office w/attaclmient
Dale Hamby(with electronic copy)

United States Environmental Protection Agency Form Approved
EPA/y Washington,D C 20460 OMB No 2040-0057
C /1 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 [ 2 L 3 I NC0082759 111 121 18/03/21 117 18[ I 191
s
I 201 I
21I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA --- -- Reserved-------------
671 1 "11 71 1 I 72 L-I N 731 I 174 75Il 1 1 1 1 1 1 180
Section B Facility Data i
Name and Location of Facility Inspected(For lndustnal Users discharging to POTW,also include Entry Time/Date Permit Effective Date
POTW name and NPDES permit Number) 10 00AM 18/03/21 13/07/01
Orange-Alamance Water System WTP
Exit Time/Date Permit Expiration Date
US Hwy 70 E
11 20AM 18/03/21 18/01/31
Efland NC 27243
Name(s)of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data
///
Christopher Dale Hamby/ORC/919-563-6212/
Name,Address of Responsible Official/Title/Phone and Fax Number
Contacted
Sandra Faye Metcalf,PO Box 187 Mebane NC 27302018711919-563-6212/
No
Section C Areas Evaluated During Inspection(Check only those areas evaluated)
Permit in Operations&Maintenance MI Records/Reports Self-Monitoring Program
2 Facility Site Review E Effluent/Receiving Waters i3 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
Cheng Zhang RRO WQ//919-791-4200/ /
I /
Sig ture f Management Q A .4e7 Agency/Offi -/Phone and Fax Numbers Date
is'4 L.- fa/1i- Ati )((://1) i7-(7/...276> II g
EPA Form 3566Rev 9-94)Previous editions are obsolete
Page# 1

Permit NC0082759 Owner-Facility Orange-Alamance Water System WTP
Inspection Date: 03/2112018 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 001110
application?
Is the facility as described in the permit? 000III ❑
#Are there any special conditions for the permit? ❑ ® ❑ ❑
Is access to the plant site restricted to the general public'? ® 000
Is the inspector granted access to all areas for inspection? ® 000
Comment Permit expired January 31, 2018. New permit is being drafted by the Division.
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping'? ® ❑ ❑ ❑
Does the facility analyze process control parameters,for ex MLSS, MCRT, Settleable 001110
Solids, pH, DO, Sludge Judge, and other that are applicable'?
Comment
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'? 000
If effluent (diffuser pipes are required) are they operating properly'? ❑ ❑ ® ❑
Comment
Record Keeping Yes No NA NE
Are records kept and maintained as required by the permit'? i' DOD
Is all required information readily available, complete and current'? PI0001
Are all records maintained for 3 years(lab reg required 5 years)? 000
Are analytical results consistent with data reported on DMRs? !° 000
Is the chain-of-custody complete'? Ii000
Dates,times and location of sampling f
Name of individual performing the sampling 112
Results of analysis and calibration *-
Dates of analysis II
Name of person performing analyses
Transported COCs
Are DMRs complete do they include all permit parameters'? 000
Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ ❑
Page# 3

Permit. NC0082759 Owner-Facility. Orange-Alamance Water System WTP
Inspection Date: 03/21/2018 Inspection Type Compliance Evaluation
Record Keeping Yes No NA NE
(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? fir: ❑ ❑ ❑
Is the backup operator certified at one grade less or greater than the facility classification? 0 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? ❑ ❑ ❑
Comment
Lagoons Yes No NA NE
Type of lagoons? Aerated
#Number of lagoons in operation at time of visit? 2
Are lagoons operated in? Series
#Is a re-circulation line present? ❑ ❑ ❑
Is lagoon free of excessive floating materials? • ❑ ❑ ❑
#Are baffles between ponds or effluent baffles adjustable? ❑ ❑ 4 0
Are dike slopes clear of woody vegetation? ❑ ❑ ❑
Are weeds controlled around the edge of the lagoon? ❑ ❑ 0
Are dikes free of seepage? ❑ ❑ 0
Are dikes free of erosion? ❑ ❑ ❑
Are dikes free of burrowing animals? ff] ❑ ❑ ❑
#Has the sludge blanket in the lagoon(s)been measured periodically in multiple IlE0100
locations?
#If excessive algae is present, has barley straw been used to help control the growth? ❑ 0 ❑
Is the lagoon surface free of weeds? iig000
Is the lagoon free of short circuiting? ❑ ❑ ❑
Comment
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? D3 ❑ ❑ ❑
#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)?
Page# 4

Permit NC0082759 Owner-Facility Orange-Alamance Water System WTP
Inspection Date. 03/21/2018 Inspection Type Compliance Evaluation
Laboratory Yes No NA NE
Incubator(Fecal Coliform)set to 44 5 degrees Celsius+/-0 2 degrees'? ® ❑ ❑ ❑
Incubator(BOD)set to 20 0 degrees Celsius+/-1 0 degrees'? 01=111111=1
Comment.
De-chlorination Yes No NA NE
Type of system? Liquid
Is the feed ratio proportional to chlorine amount(1 to 1)7 111011111
Is storage appropriate for cylinders'? DDIND
#Is de-chlorination substance stored away from chlorine containers'? MOOD
Are the tablets the proper size and type'? ❑ ❑ ® ❑
Comment Calcium thiosulfate solution is fed to backwash water for de-chlorination
Are tablet de-chlorinators operational'? DDN1D
Number of tubes in use'?
Comment
Page# 5

rrtegIonal inspectors' Uheellast for Held Parameters
Facility Name. L11(-w1,�Q^�/c, �-n4ic,a_ �i�/Tp - N 2
Regional Plant Inspector: C ,e- e-' �-
NPDES # 0✓G oo d' 2 7S-9 Regional Inspector Contact#: / 5-. - -?7/ - v2J-5
Field Lab Certification #: S---(5-'-i6 Region: (Icy,,(,_=g A
Lab Contact. De- ( Hcy, -3- Date. 3/Z//2-0 le
I. Check the parameters) performed at this site for reporting purposes.
Total Residual Chlorine (TRC)
! Temperature (TEMP)EMP) ❑ Specific Conductivity (SC)
p
pH n Dissolved Oxygen (DO) ❑ Settleable Residue (SETT)
II. General Laboratory (note any exceptions in section XI)
Are instruments, meters, probes, photometric cells, etc. maintained in good condition? FYI.Yes I I No
Are standards, reagents and consumables used within manufacturer expiration dates'? ❑ Yes I-4 No
[TRC gel standard is exempt] -7,0 ((1r.r 42-0i3') , / O. o ( II/2-0/ 7) - 9O( 1/z°/g)
Are the following items documented (q where applicable)* .
Item TRC pH TEMP DO' SC SETT
Date of sample collection* Y-
Time of sample collection*
Sample collector's initials or signature X A
Date of sample analysis* )(
Time of sample analysis* X
Analyst initials or signature X )`-
Sample location i)( _
*Date and time of sample collection and analysis may be the same for in situ or on-site measurements
Ill. Total Residual Chlorine
Total Residual Chlorine meter make and model /'-"1 A c/-) b & 3`} o0
Is'a check standard analyzed each day of use's (Circle one: gel or quid standard' ZI Yes ❑ No
What is the assigned/observed value of the daily check standard'? 0, 2c�,,,,-/e. (7.40
is a 5-point calibration verification performed'? Note date of last verification: n Yes ❑ No
Alternatively, does the lab construct a linear regression, using 5 standards, tocalculate F,Yes n No
results'? Note date of last calibration curve constructed: ///' 6 / "2--° a
True values IN pg/L ❑ mg/L 13 S 2- /a ao? -/6
Obtained values' IN pg/L ❑ mg/L / - , (-', to 2_ -240 44aS-
What program are samples analyzed on'?
Are results reported in proper units'? Check one IX pg/L mg/L ❑ Yes I No
Are results reported between the facility's permit limit and the compliance limit of 50 pg/L? ❑ Yes I21 No
If value is less than the low standard, report as "<x", where x=low standard conc.
Are samples analyzed within 15 minutes of collection'? Al Yes ❑ No
ly. pH
pH meter make and model. ()y-;r,,i) $ �-,-ti
Is the pH meter calibrated with at least 2 buffers per mfg's instructions each day of use? I] Yes No
Note buffers used' 4 , /© , 7
Is the pH meter calibration checked with an additional buffer each day of use? Note check A Yes ❑ No j'
buffer used' .7 n6Q don,✓ke- i•-•r2 d.'jr 0o•¢ y G-' ''' '''l
Does the check buffer read within ±0 1 S.0 of the known value? I I Yes n No NA
Are the following items documented
Meter calibration? -„ Yes No
Check buffer reading'? fl Yes ® No
Are samples analyzed within 15 minutes of collection? X Yes I I No
Are sample results reported to 0 1 pH units? ® Yes ❑ No

y. i emperature _
What instrument(s) is used to measure temperature? Check all that apply. ❑ pH meter
❑ DO meter ❑ Conductivity meter ❑ Digital thermometer lifq Glass thermometer
Is the instrument/thermometer calibration checked at least annually against a NIST ❑54 Yes ❑ No
traceable or NIST certified thermometer? / Q/Z3/7-ar 7
Are temperature corrections (even if zero) posted on the instrument/thermometer? IK Yes ❑ No
Are samples measured in situ or on-site? [REQUIRED -there is no holding time for ❑ Yes ❑ No
temperature] A/4-
Are
/4Are sample results reported in degrees C9 WA ❑ Yes ❑ No
VI. Dissolved Oxygen'
DO meter make and model.
Is the air calibration of the DO meter performed each day of use? ❑ Yes ❑ No
Are the following items documented:
Meter calibration? ❑ Yes ❑ No
Are samples analyzed within 15 minutes of collection? ❑ Yes ❑ No
Are results reported in mg/L? ❑ Yes ❑ No
VII. ' Conductivity
Conductivity meter make and model:
Is the meter calibrated daily according to the manufacturer's instructions? Note standard ❑ Yes ❑ No
used (this is generally a one-point calibration):
Is a daily check standard analyzed? Note value: ❑ Yes ❑ No
Are the following items documented:
Meter calibration? ❑ Yes ❑ No
Are samples analyzed within 28 days of collection? ❑ Yes ❑ No
Are results reported in pmhos/cm (some meters display equivalent pS/cm units)? ❑ Yes ❑ No
VIII. Settleable Residue
Does the laboratory have an Imhoff Cone in good condition? ❑ Yes ❑ No
Is the sample settled for 1 hour? ❑ Yes ❑ No
Is the sample agitated after 45 minutes? ❑ Yes ❑ No
Are the following items documented:
Volume of sample analyzed? Note volume analyzed ❑ Yes, ❑ No
Date and time of sample analysis (settling start time)? ❑ Yes ❑ No
Time of agitation after 45 minutes of settling? ❑ Yes ❑ No
Sample analysis completion (settling end time)? 0 Yes ❑ No
Are samples analyzed within 48 hours of collection? ❑ Yes ❑ No
Are results reported in ml/L? ❑ Yes ❑ No
IX. Was a paper trail (comparing contract lab and on-site data to DMR) [ Yes ❑ No
performed? If so, list months reviewed: ��or
X. Is follow-up by the Laboratory Certification program recommended? '. ❑ Yes No
XI. Additional comments:
ciAio + ►/' r 2. ( i I r'..t/
o ;✓tt� — � . — �� t i /0 ' _
iIc1�e.,)
Please submit a copy of this completed form to the Laboratory Certification program at:
DWQ Lab Certification, Chemistry Lab, Courier# 52-01-01
Electronic copies may be emailed to linda.chavisncdenr goy
Revision 04/20/2012