NC0083119_Permit issuance_20131115

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Water Quality Programs
Pat McCrory Thomas A. Reeder John E. Skvarla, III
Governor Director Secretary
November 15, 2013
Mr. Jeffrey D. Isley, Lab Supervisor
City of Concord
P.O. Box 308
Concord, North Carolina 28026
Subject: NPDES Final Permit
Permit NC0083119
Coddle Creek WTP
Cabarrus County
Class I Facility
Dear Mr. Isley:
Division personnel have reviewed and approved your application for renewal of the
subject permit. Accordingly, we are forwarding the attached NPDES permit. This permit is
issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency dated October 15, 2007 (or as subsequently amended).
The final permit contains the following changes from your previous permit:
• A daily maximum limit for turbidity of 50 NTU was added to the permit. The draft permit
included this limit but the draft cover letter incorrectly noted that it was a weekly average
limit.
• A monthly average limit for total fluoride of 1.8 mg/1 was added to the permit. The draft
permit included this limit but the draft cover letter incorrectly noted that it was a weekly
average limit.
• The flow limit was removed from the permit.
• Monitoring for calcium, copper and magnesium were removed from the permit.
• Monitoring for Iron was modified to Quarterly.
• A permit reopener condition addressing aquatic toxicity failures was added to the permit (See
Condition A.(3.)).
1617 Mail Service Center, Ralegh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone]
Internet w .ncwateroualiN.oro
One
NorthCarolina
Naturally
An Equal Opportunity 1 Afirmadve Action Employer

November 15, 2013
City of Concord
Page 2 of 2
In addition a special condition was added to your permit including requirements for
electronic reporting. Proposed federal regulations require electronic submittal of all discharge
monitoring reports (DMRs) and specify that, if a state does not establish a system to receive such
submittals, then permittees must submit DMRs electronically to the Environmental Protection
Agency (EPA). The Division anticipates that these regulations will be adopted and is beginning
implementation.
The requirement to begin reporting discharge monitoring data electronically using the NC
DWR's Electronic Discharge Monitoring Report (eDMR) internet application has been added to
your final NPDES permit. [See Special Condition A. (4.)] For information on eDMR,
registering for eDMR and obtaining an eDMR user account, please visit the following web page:
http://aortal.nedenr.org/web/wo/admin/bog[ipu/edmr.
For information on EPA's proposed NPDES Electronic Reporting Rule, please visit the
following web site:
http://www2.ena.gov/compliance/nronosed-nodes-electronic-reporting-rule.
If any parts, measurement frequencies or sampling requirements contained in this permit
are unacceptable to you, you have the right to an adjudicatory hearing upon written request
within thirty (30) days following receipt of this letter. This request must be in the form of a
written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina
27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The
Division may require modification or revocation and reissuance of the permit. This permit does
not affect the legal requirements to obtain other permits which may be required by the Division
of Water Resources or permits required by the Division of Land Resources, the Coastal Area
Management Act or any other federal or local governmental permits that may be required.
If you have any questions concerning this permit, please contact Teresa Rodriguez at
telephone number [phone] or at email [e-mail].
Sincerely, C"-
iomasA. Reeder
n
cc: NPDES Files
Central Files
Mooresville Regional Office / Surface Water Protection Section
NPI)ES, Steve Reid (e-copy)
Aquatic Toxicology Unit (e-copy)

Permit NCO083119
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended, the
City of Concord
is hereby authorized to discharge wastewater from a facility located at the
Coddle Creek Water Treatment Plant (WTP)
6936 Davidson Highway
Concord
Cabarrus County
to receiving waters designated as an unnamed tributary to Coddle Creek in the Yadkin -Pee
Dee River Basin,
in accordance with effluent limitations, monitoring requirements, and other conditions set
forth in Parts I, II, III and IV hereof.
This permit shall become effective December 1, 2013.
This permit and authorization to discharge shall expire at midnight on November 30, 2018.
Signed this day November 15, 2013.
mas A. Reeder, Director
/ Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 8

Permit NCO083119
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are
hereby revoked. As of this permit issuance, any previously issued permit bearing this
number is no longer effective. Therefore, the exclusive authority to operate and discharge
from this facility arises under the permit conditions, requirements, terms, and provisions
included herein.
The City of Concord is hereby authorized to:
1. Continue to operate a conventional water treatment plant with a discharge of filter
backwash water. This WTP has a design potable flowrate of 12.0 MGD and a monthly
average wastewater discharge of 0.6 MGD. This facility is located at 6935 Davidson
Highway in Cabarrus County and consist of:
• Two settling lagoons
• Dechlorination with calcium thiosulfate
2. Discharge from said treatment works at the location specified on the attached map into
an unnamed tributary to Coddle Creek, classified C waters in the Yadkin -Pee Dee River
Basin.
Page 2 of 8

Permit NCO083119
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of this permit and lasting until expiration,
the Permittee is authorized to discharge filter backwash from outfall 001. Such discharges
shall be limited and monitored by the Permittee as specified below:
a
r
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:Sample'.:
Y;SaM
"'
' . e r f 3
aAvera
e'°=;
Maiimum_ _�
Fe eunc
i T� a
L.o_
Flow
Weekly
Continuous
Effluent
TSS
30 mg/L
45 m /L
Weekly
Grab
Effluent
H
6.0 s.0 — 9.0
s.u.
Weekly
Grab
Effluent
Total Residual Chlorine
17 /L
Weekly
Grab
Effluent
Total Aluminum
QuarterlY4
Grab
Effluent
Total Manganese
Quarterly4
Grab
Effluent
Total Fluoride
1.8 mg/I
Monitor &
Monthly
Grab
Effluent
Report
Total Zinc 2
Quarterl
Grab
Effluent
Ammonia Nitrogen
Quarterly4
Grab
Effluent
Total Iron
Quarterly
Grab
Effluent
Total Phosphorus TP
Quarterly
Grab
Effluent
Total Nitrogen TN
Quarterly
Grab
Effluent
Turbidity
50 NTU
Monthly
Grab
. Effluent
Whole Effluent Toxicity
Monitorin
Quarterly
Grab
Effluent
Notes:
1. Limit and monitor only if the facility adds chlorine to water that is eventually discharged. The
Division shall consider all effluent TRC values reported below 50 µg/ 1 to be in compliance with the
permit. However, the Permittee shall continue to record and submit all values reported by a North
Carolina certified laboratory (including Meld certified), even if this values fall below 50 µg/l.
2. Zinc should only be monitored if Permittee uses zinc orthophosphate as a corrosion inhibitor.
3. Facilities using chloramination will be required to monitor ammonia nitrogen on a quarterly basis.
4. Parameters should be monitored in conjunction with toxicity test.
5. See Condition A (2.).
All samples collected should be from a representative discharge event.
There shall be no discharge of floating solids or visible foam in other than trace
amounts.
Page 3 of 8

Permit NCO083119
A. (2.) CHRONIC TOXICITY MONITORING (QRTRLY)
The permittee shall conduct Quarterly chronic toxicity tests using test procedures outlined in
the "North. Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December
2010, or subsequent versions.
The effluent concentration defined as treatment two in the procedure document is 90%. The
testing shall be performed as a Ceriodaphnia dubia 7-day pass/fail test. The tests will be
performed during the months of January, April, July and October. These months signify
the first month of each three month toxicity testing quarter assigned to the facility. Effluent
sampling for this testing must be obtained during representative effluent discharge and shall
be performed at the NPDES permitted final effluent discharge below'all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the
Effluent Discharge Monitoring Form (MR-1) for the month in which it was performed, using
the parameter code TGP3B. Additionally, DWR Form AT-1 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Resources
Environmental Sciences Section
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences
Section no later than 30 days after the end of the reporting period for which the report is
made.
Test data shall be complete and accurate and include all supporting chemical/ physical
measurements performed in association with the toxicity tests, as well as all dose/response
data. Total residual chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility -during a month in which toxicity
monitoring is required, the permittee will complete the information located at the top of the
aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number,
county, and the month/year of the report with the notation of "No Flow" in the comment area
of the form. The report shall be submitted to the Environmental Sciences Section at the
address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required,
then monthly monitoring will begin immediately. Upon submission of a valid test, this
monthly test requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North
Carolina Division of Water Resources indicate potential impacts to the receiving stream, this
permit may be re -opened and modified to include alternate monitoring requirements or
limits.
If the Permittee monitors any pollutant more frequently then required by this permit, the
results of such monitoring shall be included in the calculation & reporting of the data
submitted on the DMR & all AT Forms submitted.
Page 4 of 8

Permit NCO083119
NOTE: Failure to achieve test conditions as specified in the cited document, such as
minimum control organism survival, minimum control organism reproduction, and
appropriate environmental controls, shall constitute an invalid test and will require
immediate follow-up testing to be completed no later than the last day of the month following
the month of the initial monitoring.
A. (3.) PERMIT RE -OPENER - WHOLE EFFLUENT TOXICITY
Whole effluent toxicity monitoring results indicating aquatic toxicity may result in the
Division re -opening this permit or requesting by letter that further action be taken.
Additional metals testing, a toxicity identification evaluation, a toxicity reduction
evaluation, and/or an assessment of discharge alternatives may be requested.
A. (4.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
Proposed federal regulations require electronic submittal of all discharge monitoring reports
(DMRs) and specify that, if a state does not establish a system to receive such submittals,
then permittees must submit DMRs electronically to the Environmental Protection Agency
(EPA). The Division anticipates that these regulations will be adopted and is beginning
implementation in late 2013.
NOTE: This special condition supplements or supersedes the following sections within Part II
of this permit ( Standard Conditions for NPDES Permits) :
• Section B (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting [Supersedes Section D. (2.1 and Section E. (5.) (a)1
Beginning no later than 90 days from the effective date of this permit, the permittee shall
begin reporting discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each
month and submitted electronically using eDMR. The eDMR system allows permitted
facilities to enter monitoring data and submit DMRs electronically using the internet.
Until such time that the state's eDMR application is compliant with EPA's Cross -Media
Electronic Reporting. Regulation (CROMERR), permittees will be required to submit all
discharge monitoring data to the state electronically using eDMR and will be required to
complete the eDMR submission by printing, signing, and submitting one signed original
and a copy of the computer printed eDMR to the following address:
NC DENR / DWR / Information Processing Unit
ATTENTION: Central Files / eDMR
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Page 5 of 8

Permit NCO083119
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due
to the facility being physically located in an area where less than 10 percent of the
households have broadband access, then a temporary waiver from the NPDES electronic
reporting requirements may be granted and discharge monitoring data may be submitted
on paper DMR forms (MR 1, 1.1, 2, 3) or alternative forms approved by the Director.
Duplicate signed copies shall be submitted to the mailing address above.
Requests for temporary waivers from the NPDES electronic reporting requirements must
be submitted in writing to the Division for written approval at least sixty (60) days prior to
the date the facility would be required under this permit to begin using eDMR.
Temporary waivers shall be valid for twelve (12) months and shall thereupon expire. At
such time, DMRs shall be submitted electronically to the Division unless the permittee re-
applies for and is granted a new temporary waiver by the Division.
Information on eDMR and application for a temporary waiver from the NPDES electronic
reporting requirements is found on the following web page:
http:I/13ortal.ncdenr.org/web/­wq/admin/­bog/ipu/edmr
Regardless of the submission method, the first DMR is due on the last day of the month
following the issuance of the permit or in the case of a new facility, on the last day of the
month following the commencement of discharge.
2. Signatory Requirements [Supplements Section B. (11.) (b) and supersedes Section B.
11. d
All eDMRs submitted to the permit issuing authority shall be signed by a person
described in Part II,- Section B. (11.) (a) or by a duly authorized representative of that
person as described in Part II, Section B. (11.) (b). A person, and not a position, must be
delegated signatory authority for eDMR reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an
eDMR user account and login credentials to access the eDMR system. For more
information on North Carolina's eDMR system, registering for eDMR and obtaining an
eDMR user account, please visit the following web page:
http: / /portal.ncdenr.org/web jwq/admin jboglipu/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system
shall make the following certification [40 CFR 122.221. NO OTHER STATEMENTS OF
CERTIFICATION WILL BE ACCEPTED:
"I certfy, under penalty of law, that this document and all attachments were prepared
under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted. Based on my
inquiry of the person or persons who manage the system, or those persons directly
responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant
penalties for submitting false information, including the possibility of fines and
imprisonment for knowing violations. "
Page 6 of 8

Permit NCO083119
3. Records Retention (Supplements Section D. (6.11
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR
submissions. These records or copies shall be maintained for a period of at least 3 years
from the date of the report. This period may be extended by request of the Director at any
time [40 CFR 122.41].
Page 7 of 8

City of Concord Facility Location (not to scale)
Coddle Creek WTP
J
Latitude: 35025' 57" N State Grid: Concord
Longitude: 80041' 40" W Stream Class: C
Receiving Stream: UT to Coddle Creek Sub -Basin: 03-07-11 N NPDES Permit No. NCO083119
Drainage Basin: Yadkin -Pee Dee River Basin Cabarrus County
Page 8 of 8

Rodriguez, Teresa
From: Allocco, Marcia
Sent: Monday, October 07, 2013 10:20 AM
To: Rodriguez, Teresa
Cc: Bell, Wes; Parker, Michael
Subject: RE: Draft Permit Concord WTP - NCO083119
Teresa,
As Wes requested I have reviewed the Concord Coddle Creek WTP draft permit and offer the following comments.
Regards,
Marcia
• Note 1 under the Effluent limitations table contains some spelling/grammar issues - very last sentence should be
"even if these values fall below 50..." 01(-
• Fact sheet notes that a fluoride weekly average limit of 1.8 mg/L would be added — permit notes a fluoride
monthly average of 1.8 mg/L with monthly monitoring -Q'UILC. t- i s C-ei'v'e Cf"
• Fact sheet notes a turbidity weekly average limit of 50 NTU limit — permit notes a 50 NTU daily maximum limit
with monthly monitoring pk"ice
• Permit does not include EPA ICIS parameter codes — it was my understanding that all reissued permits would
now include the codes; this helps avoid erroneous monitoring violations from being created.
From: Bell, Wes
Sent: Thursday, September 26, 2013 4:51 PM
To: Allocco, Marcia
Subject: FW: Draft Permit Concord WTP - NCO083119
An extra set of eyes always helps.
From: Pitner, Andrew
Sent: Thursday, September 26, 2013 4:45 PM
To: Bell, Wes
Cc: Rodriguez, Teresa; Parker, Michael
Subject: FW: Draft Permit Concord WTP - NCO083119
Hey Wes,
As we discussed, please review this for the MRO. Thanks,
Andrew
From: Rodriguez, Teresa
Sent: Thursday, September 26, 2013 7:56 AM
To: Pitner, Andrew
Subject: FW: Draft Permit Concord WTP - NCO083119
Andrew, I got the out of office response for Mike, please forward to the reviewer.
Thanks,
Teresa
1

Independent Tribune
Advertising Affidavit
PC Box 968
Hickory, NC 28603
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Number
3611028
Date
September 27, 2013
Date Category Description Ad Number Ad Size
09/27/2013 Legal Notices Public Notice North Carolina Environmental Managemen 0003107651 1 x 30 L
Publisher of
Independent Tribune
Cabarrus County
Before the undersigned, a Notary Public of Catawba County, North
Carolina, duly commissioned, qualified, and authorized by law to
administer oaths, in said County and State; that he/she is authorized to
make this affidavit and sworn statement; that the notice or other legal
advertisement, a copy of which is attached hereto, was published in the
Independent Tribune on the following dates:
09/27/2013
and that the said newspaper in which such notice, or legal advertisement
was published, was a newspaper meeting all the requirements and
qualifications of Section 1-597 of the General StatutesofNorth Carolina.
Assistant Bookkeeper
Newspaper reference: 0003107651
Sworn to and subscribed before me, this 1 day of 2013
sturnnttrt
Notary P blic
^��A,/.� ��, - �pTAR1-
My Commission expires: l�--0 450 AU B OC) =U zz
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. TH/i71'9f�l��VNa`��
tttttntnttN

Rodriguez, Teresa
From: Bell, Wes
Sent: Friday, September 27, 2013 1:54 PM
To: Rodriguez, Teresa
Cc: Pitner, Andrew
Subject: RE: Draft Permit Concord WTP - NCO083119
Teresa,
I found no issues with the draft permit. Thanks for the info.
Wes
From: Pitner, Andrew
Sent: Thursday, September 26, 2013 4:45 PM
To: Bell, Wes
Cc: Rodriguez, Teresa; Parker, Michael
Subject: FW: Draft Permit Concord WTP - NCO083119
Hey Wes,
As we discussed, please review this for the MRO. Thanks,
Andrew
From: Rodriguez, Teresa
Sent: Thursday, September 26, 2013 7:56 AM
To: Pitner, Andrew
Subject: FW: Draft Permit Concord WTP - NCO083119
Andrew, I got the out of office response for Mike, please forward to the reviewer.
Thanks,
Teresa
From: Rodriguez, Teresa
Sent: Thursday, September 26, 2013 7:54 AM
To: Parker, Michael
Subject: Draft Permit Concord WTP - NCO083119
Attached is the draft permit for the City of Concord WTP. Please let me know if your office has any comments.
Thanks,
Teresa
Teresa Rodriguez
NPDES Complex Permitting Unit
NCDENR/Division of Water Resources
T. 919-807-6387 F. 919-807-6489
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
1

DENR/DWR
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO083119
Facility
Information
Applicant/Facility Name:
City of Concord/Coddle Creek WTP
Applicant Address:
P.O. Box 308, Concord, NC 28026
Facility Address:
6935 Davidson Highway,
Concord, NC 28027
Average Flow:
0.6 MGD
Type of Waste:
Filter backwash
Facility/Permit Status:
Renewal/PC 1
County:
Cabarrus
Miscellaneous
Receiving Stream:
UT to Coddle Creek
Regional Office:
Mooresville
Stream Classification:
C
State Grid / USGS Quad:
F16NW/Concord
303(d) Listed?
Yes
Permit Writer:
Teresa Rodriguez
HUC:
03040105
Date:
9/11/13
Sub -basin:
03-07-11
Lat. 35025' ST' N Long. 80041' 40" W
Drainage Area (f
0
Summer 7Q10 cfs :
0
Winter 7Q10 (cfs)
Average Flow (cfs):
IWC (%):
100%
Summary
The Town of Concord currently operates the Coddle Creek WTP, a conventional water treatment
plant with a potable flow rate of 12 MGD and a backwash discharge flow of 0.6 MGD. The
treatment process for the raw water consists of oxidation with potassium permanganate,
powder activated carbon system for odor control, coagulation and sedimentation and filters.
The settled sludge and the filter backwash are discharged into two settling lagoons. The
supernate is dechlorinated before discharged to the stream. Water additives include aluminum
sulfate, fluoride, potassium permanganate, coagulant, sodium hypochlorite, sodium hydroxide,
polyphosphate and calcium thiosulfate.
Receiving Stream:
This facility discharges to a UT of Coddle Creek in the Yadkin -Pee Dee River Basin, classified C
waters. Coddle Creek is impaired for turbidity.
Data Review:
The current permit includes limits for TSS, pH, and TRC and monitoring for aluminum,
calcium, magnesium, zinc, copper, iron, fluoride, ammonia, TN, TP and chronic toxicity.
The maximum monthly average flow for the previous three years was 0.617 MGD. This flow
was used for the reasonable potential analysis. A reasonable potential analysis was performed
for fluoride and iron. Both parameters have reasonable potential to exceed the water quality
standard.
All the results for copper were below detection limits. Zinc monitoring was not performed
because they don't use additives containing zinc.
Fact Sheet
NIMES NCO083119 Petmit Renewal
Page 1

Chronic toxicity failures have been reported 6 times since 2009. The permit will include a
reopener clause addressing toxicity.
Proposed Changes:
1. Following guidance for WTP renewals the following changes are incorporated in the
draft permit:
• Flow limit was removed from the permit.
• Monitoring for calcium, copper and magnesium were removed from the permit.
• Monitoring for Iron was modified to Quarterly
2. As a result of the reasonable potential analysis a fluoride weekly average limit of 1.8
mg/1 for was added to the permit.
3. Coddle Creek is impaired for turbidity therefore a turbidity weekly average limit of 50
NTU was added to the permit.
4. A permit reopener condition addressing actions on aquatic toxicity failures was added
to the permit.
Draft Permit to Public Notice: September 24, 2013
Permit Scheduled to Issue: November 18, 2013
NPDES DIVISION CONTACT
If you have questions regarding any of the above information or on the attached permit, please
contact Teresa Rodriguez at 919-807-6387.
DATE:
REGIONAL OFFICE COMMENTS
NAME: DATE:
SUPERVISOR: DATE:
Fact Sheet
NPDES NC008a 119 Pennit Renewal
Paa '-)

Concord WTP REASONABLE POTENTIAL ANALYSIS
NCO083119
Qw (MGD) = 0.62
WWTP/WTP Class: class 1
1Q10S (cfs) = 0.00
IWC @ 1Q10S = 100.00%
7Q10S (cfs) = 0.00
IWC @ 7Q10S = 100.00%
7Q10W (cfs) = 0.00
IWC @ 7Q10W = 100.00%
30Q2 (cfs) = NO 3002 DATA
IWC @ 30Q2 = NIA
Avg. Stream Flow, QA (cfs) = NO QA DATA
IWC @ QA = NIA
Receiving Stream: UT to C
Stream Class:
Outfall 001
Qw=0.617MGD
CHRONIC TEST CONCENTRATION = DEFAULT%
=90°%
PARAMETER
STANDARDS 8. CRITERIA (2)
12
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
(1)
a
z
:3
NC WQS / Applied �/2 FAV /
n # Det. Max Pred Cw Allowable Cw
Chronic Standard Acute
Acute: NO WQS
RP, limit
Fluoride
NC
1800 FW
ug/L
110 31
7,600.0
—�— — ---�—
•
__
--Chronic: ___ —1,-8
1,800.0 _
- -- —
1 values > Allowable Cw
Acute: NO WQS
Iron
nc
1000 FW
µg/L
110 74
2,371.95000___
Chronic: 1000A0000
_ ___ _ ________
2 values > Allowable Cw
Acute:
0 0
N/A
-----------
Chronic:
— - -------------
Acute:
0 0
N/A
___onic: -_
Chr--------
— — — — — — - —
Acute:
0 0
N/A
_
_ic----------
---------------
--Chron
---------
83119 RPA.xism, rpa
Page 1 of 1 9//16/2013

REASONABLE POTENTIAL ANALYSIS
oM Deis a..I L RII
100 w ad Da"
W N M..e
1W W CV
IN w n
IN 50
IN W Mue F.
IN 50 Max V.I.
IN In Mv.RNQr
IN N
1a 140
1N IN
10 140
250 250
310 310
m 290
220 2N
2N 200
IN 1N
210 210
n0 2N
0 150
W W
d RO 120
1N 1N
1N 50
1N 50
1N 0
210 210
vo 17G
1N 1N
2N 200
N 5a
N
70
IN IN
1N
'a
iw 110
ITOIN 50
1N N
1N IN
1N N
1N 1N
< NO xso
Wa 2W
5N 250
w x50
25
sao
O xso
SN 2W
NO 250
Na 20
SW 250
SW 2W
5N 250
500 250
SN 2N
SW 2
SN 2w
'00W
W 2W
5W 2W
500 250
'00
2"
SW. 250
500 2W
500 250
500 250
SN 2
5N 2%
5N 250
5W 250
W
V.
5N 2N
SW 2W
NO 250
NO 250
NO 2W
SN 2"
5N 254
5D0WO 2W
SW 2W
N2 2N
250 NO
SW 250
WD 2W WO
SN 2W
< 5N 250
5N 2W
5N 2:a
ND 250
WO 2W Na
5N 250
SN 250
N 250
SN 250
5N 20
5W 250
SW 250
520 0
5W 20
5W 250
SW 2
5N 2Ww
N 2W
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Whole Effluent Toxicity Testing and Self Monitoring Summary
Coats American -Sevier Plant NC0004243/001 County: McDowell
Ceri7dPF Begin: 4/1/2012 chr lim: 15% NonComp: Single
Region: ARO
Basin:
CTB30
Feb May Aug Nov
SOC_JOC:
7Q30:
18.0
PF: 2.0
IWC:
14.7 Freq: C.
J
F
M
A
M
J l
A
S
2008
Pass
'
'
Pass
• '
Pass
2009 '
Pass
*
"
Pass
' •
Pass
2010 *
Pass
"
•
Pass
* "
Pass
2011 '
Pass
•
•
Pass
• '
Pass
2012 *
Pass
*
*
Pass
* *
Pass
'
2013 "
Pass
"
0 N D
Pass "
' Pass
• Pass
' Pass
• Pass
r r r
Coddle Creek WTP
NCO083119/001 County:
Cabarrus
Region:
MRO
Basin:
YAD11
Jan
Apr Jul Oct
SOC_IOC:
Ceri7dPF Begin:
1/1/2009 Chr Monit: 90%
NonComp:
7Q10:
PF: 0.30
IWC:
Freq: Q
l
F
M
A
M
J
J
A
S
O
N
D
2009
Fail
•
•
Fail
•
•
Fail
•
s
Pass
'
2020
Pass
'
Pass
•
Fail
•
'
Pass
2011
Pass
"
'
Pass
`
`
Pass
'
•
Fall
2012
Fall
•
'
Pass
'
'
Pass
'
•
Pass
2013
Pass
`
'
"
•
'
*
'
•
'
•
"
Colonial Pipeline-RDU/001
NCO081469/001 County:
Wake
Region:
PRO
Basin:
NEU02
SOCJOC:
Fthd24Ac Begin:
6/1/2008 24hr LC50 ac monit a
NonComp:
7Q30:
NA
PF: N/A
IWC:
100
Freq: A
J
F
M
A
M
J
I
A
S
0
N
D
2008
'
>100
•
•
'
'
'
.
•
'
2009
•
'
`
'
•
N
•
•
•
>100
2010
'
"
'
•
>100
.
•
.
a
2011
'
'
'
'
'
>100
2012
'
'
"
•
>100
'
•
'
'
•
'
Colonial Pipeline/001 NCO031046/001 County: Guilford Region:
WSRO
Basin:
CPF08
SOC_JOC:-
Fthd24Ac Begin: 2/1/2007 24hrLC50acmonite NonComp:
7Q10: 0.0
PF: NA
IWC:
100
Freq: A
J F
M A
M
l
J
A
S
0 N D
2008
• '
, >100
,
•
•
•
•
s
2009
' •
>IDO
>100
s
2010
'
•
>100
'
•
•
"
2011
•
• >100
•
s
2012
• '
•
>100
•
•
r
2013
• >100
Page 27 of 147

To: Western NPDES Program Unit
Surface Water Protection Section
Attention: Charles Weaver
Date: June 27, 2013
NPDES STAFF REPORT AND RECOMMENDATION
County: Cabarrus
Permit No. NCO083119
PART I - GENERAL INFORMATION
1. Facility and Address: Coddle Creek Water Treatment Plant
6935 Davidson Highway
Concord, North Carolina 28026
2. Date of Investigation: June 26, 2013
3. Report Prepared By: Samar Bou-Ghazale, Env. Engineer II
4. Persons Contacted and Telephone Number: Jeffery Isley, Lab Supervisor; [phone]
5. Directions to Site: From the junction of SR 1430 (N. Crisco Rd.) and Hwy 73 in western
Cabarrus County, travel 0.7 mile west on Hwy 73. The entrance to the WTP is on the left
(south) side of Hwy 73 just before crossing Coddle Creek.
6. Discharge Point(s): List for all discharge points:
Latitude: 35°25' 57" Longitude: 80° 41' 40"
0 n
U.S.G.S. Quad No.: F 16 NW U.S.G.S. Name: Kannapolis, N.C. JUi
7. Receiving stream or affected surface waters: Coddle Creek
pDINT
a. Classification: C
b. River Basin and Subbasin No.: Yadkin Pee -Dee; 03-07-11
C. Describe receiving stream features and pertinent downstream uses: The receiving
stream in this area is approximately 25-30 feet wide (bank to bank) and has
considerable flow. General C classification uses downstream.
PART H - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 0.6 MGD.
b. What is the current permitted capacity of the wastewater
MGD
JUL 0 5 2013

C. Actual treatment capacity of the current facility (current design capacity)? 0.6
MGD
d. Please provide a description of existing or substantially constructed wastewater
treatment facilities: The existing treatment facility consists of two (2) wastewater
storage treatment lagoons. Calcium thiosulfate is added for de -chlorination prior
to discharging to Coddle Creek.
e. Possible toxic impacts to surface waters: Data collected in past studies performed
by DWQ of WTP effluents has found a variety of toxicity concerns (chlorine,
aluminum, etc.), that may warrant further attention.
PART IV - EVALUATION AND RECOMMENDATIONS
The applicant is requesting renewal of this permit to discharge supernate from two
wastewater lagoons into Coddle Creek. Sludge from these two lagoons was being removed by a
private contractor during the site investigation. Sludge is being transported to BFI for final
disposal.
The facilities appeared to be in good operational condition during the time of the
investigation.
Pending review and approval by the NPDES Unit, It is recommended that the NPDES
permit be renewed as requested.
,Signature of Report Preparer Date
Water Quality Regional Supervisor

NPDES PERMIT APPLICATION - SHORT FORM C - WTP 1�
For discharges associated with water treatment plants
Mail the complete application to:
N. C. Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number INCO083119
If you are completing this form in computer use the TAB key or the up - down arrows to move from one
field to the next. To check the boxes, click your mouse on top of the box. Otherwise, please print or type.
1. Contact Information:
Owner Name City of Concord
Facility Name Coddle Creek Water Treatment Plant
Mailing Address P.O. Box 308
City Concord
State / Zip Code North Carolina 28026
Telephone Number [phone]
Fax Number [phone]
e-mail Address [e-mail] ,e q""%,
2. Location of facility producing discharge:
Check here if same as above ❑'ep
Street Address or State Road 6935 Davidson Highway
City Concord
n
State / Zip Code North Carolina 28027
County Cabarrus
3. Operator Information:
Name of the firm, consultant or other entity that operates the facility.
(Note that this is not referring to the
Operator in Responsible Charge or ORC)
Name City of Concord
Mailing Address P.O. Box 308
City Concord
State / Zip Code North Carolina 28026
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑ State ❑ Private ❑
Public [V
Pagel of 3 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
5. Type,, -of treatment plant:
Conventional (Includes coagulation, flocculation, and sedimentation, usually followed by
filtration and disinfection)
❑ Ion Exchange (Sodium Cycle Cationic ion exchange)
❑ Green Sand Filter (No sodium recharge)
❑ Membrane Technology (RO, nanofiltration)
Check here if the treatment process also uses a water softener ❑
6. Description of source water(s) (i.e. groundwater, surface water)
Surface water
?. Describe the treatment process(es) for the raw water:
Oxidation with potassium permanganate; taste and odor control with powdered activated
carbon; coagulation and sedimentation, using aluminum sulfate and coagulant aid polymer
S. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility
Settled sludge and filtered backwash water is discharged to two lagoons where settling
occurs. The supernate is drafted off through discharge gates and dechlorinated, using
calcium thiosulfate, prior to its release at the discharge weir.
9. Number of separate discharge points: X
Outfall Identification number(s) 001
10. Frequency of discharge: Continuous (b' Intermittent ❑
If intermittent:
Days per week discharge occurs: N/A Duration: NLA
11. Plant design potable flowrate 12 MGD
Backwash or reject flow 0.6 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Coddle Creek
13. Please list all water treatment additives, including cleaning chemicals or disinfection
treatments, that have the potential to be discharged.
Alum / aluminum sulfate Yes X No
Page 2 of 3 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Iron sulfate / ferrous sulfate Yes No X
Fluoride Yes X No
Ammonia nitrogen / Chloramines Yes No X
Zinc -orthophosphate or sweetwater CP1236 Yes. No X
List any other additives below:
Powdered activated carbon, potassium permanganate, coagulant aid polymer,
Sodium hypochlorite, sodium hydroxide, polyphosphate, calcium thiosulfate
14. Is this facility located on Indian country? (check one)
Yes ❑ No
15. Additional Information:
Provide a schematic of flow through the facility, include flow volumes at all points in
the water treatment process. The plan should show the point[s] of addition for
chemicals and all discharges routed to an outfall [including stormwater].
v Solids Handling Plan
16. NEW Applicants
Information needed in addition to items 1-1 S:
New applicants must contact a permit coordinator with the NCDENR Customer
Service Center.
Was the Customer Service Center contacted? ❑ Yes ❑ No
Analyses of source water collected
Engineering Alternative Analysis
Discharges from Ion Exchange and Reverse Osmosis plants shall be evaluated using a
water quality model.
17. Applicant Certification
I certify that I am familiar with the information contained in the application and that to the
best of my knowledge and belief such information is true, complete, and accurate.
Printed name of. ersorjSigning Title
Signature,fif Applicant
Date
S1�13
North Carolina General Statute 143-215.6 (b)(2) provides that: Any person who knowingly makes any false statement representation, or certification in any application,
record, report, plan, or other document files or required to be maintained under Article 21 or regulations of the Environmental Management Commission implementing that
Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21
or regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $25,000, or by
imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5
years, or both, for a similar offense.)
Page 3 of 3 Version 5/2012

Coddle Creek Water Treatment Plant Lagoon System Sludge Removal Plan
NPDES permit # NCO083119
The City of Concord contracts with a private company, to remove sludge from the Coddle Creek
Water Treatment Plant (WTP) lagoons. The sludge removal contract is bid out to various firms;
the low bidder on the current project is Capricorn Grading, LLC (4801 E. Independence
Boulevard, Suite 503, Charlotte, NC 28212) and the work is being performed by SDR
Environmental Solutions, LLC (301 S. McDowell Street, Suite 606, Charlotte, NC 28204).
Sludge has been removed from the Coddle Creek lagoon approximately every three years. The
quantities of sludge average between 7000 — 8000 tons. The sludge is deposited at the BFI
landfill in Concord, NC.

2012 North Carolina 303(d) List -Category 5
Yadkin -Pee Dee River Basin
> AU Number Name
10-digit Watershed
Description
0304010503
Length or Area Units
Middle Rocky River
Classification Category
Category
Rating Use
Reason for Rating
Parameter
Year
12-digit Subwatershed
030401050305 -
Hamby Branch -Rocky Rivei
• 13-17-6-(5.5)
Coddle Creek
From a point 0.2 mile upstream of N.C. Hwy. 73 to Rocky River 14.5 FW Miles
C 5
5
Impaired Aquatic Life
Standard Violation
Turbidity
2008
• 13-17-8a
Reedy Creek
From source to McKee Creek
8.1 FW Miles
c 5
• 13-17-8b
Reedy Creek
From McKee Creek to Rocky River 7.1 FW Miles
C 5
5
Impaired Aquatic Life
Fair Bioclassification Ecological/biological Integrity Benthos
2008
> 13-17-9-(2)
Irish Buffalo Creek
From Kannapolis Water Supply Dam to Rocky River 16.7 FW Miles
C 5
> 13-17b Rocky River From mouth of Reedy Creek to mouth of Dutch Buffalo Creek 26.5 FW Miles C 5
5
Impaired
Aquatic Life
Standard Violation
Copper
2008
5
Impaired
Aquatic Life
Standard Violation
Turbidity
2008
McKee Creek
From source to Reedy Creek
6.9 FW Miles
C 5
13-17-8-4
5
Impaired Aquatic Life
Fair Bioclassification
Ecological/biological Integrity Benthos
1998
13-17-8-Sa Caldwell Creek From source to Freeman Drive 6.0 FW Miles C 5
5 Impaired Aquatic Life Fair Bioclassification Ecological/biological Integrity Benthos 2008
Yadkin -Pee Dee River Basin 10-digit Watershed 0304010504 Long Creek
.,,..-,
Friday, August 24, 2012 Approved by EPA August 10, 2012 Page 166 of 170