NC0083119_Fact Sheet_20190311

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
This form must be completed by Permit Writers for all expedited permits which do not require full Fact
Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile home parks, etc)
that can be administratively renewed with minor changes, but can include facilities with more complex
issues (Special Conditions, 303(d) listed water, toxicity testing, instream monitoring, compliance
concerns).
Basic Information for Expedited Permit Renewals
Permit Writer / Date
Sydney Carpenter 1/11/2019
Permit Number
NCO083119
Facility Name / Facility Class
Coddle Creek WTP / PC-1
Basin Name / Sub -basin number
Yadkin -Pee Dee / 03-07-11
Receiving Stream / HUC
UT to Coddle Creek / 030401050105
Stream Classification / Stream Segment
C / Index: 13-17-6- 5.5
Does permit need Daily Max NH3
limits?
No
Does permit need TRC
limits/language?
Already included.
Does permit have toxicity testing? IWC
if so.
Yes; IWC % is 90
Does permit have Special Conditions?
Yes — Chronic Toxicity Monitoring (Quarterly)
Does permit have instream monitoring?
No
Is the stream impaired (on 303(d) list)?
If yes, for what arameter(s)?
Yes — Benthos (Nar, AL, FW)
Any obvious compliance concerns?
Three NOV cases since last renewal; Two in 2018 for TSS
limit, one in 2014 for Fluoride limit. TSS, pH and Flow
monitoring violation in Nov 2018.
Any permit mods since lastpermit?
No
New expiration date
11/30/2023
Facility Overview:
The Coddle Creek WTP operates a conventional treatment WTP designed for a potable flowrate
of 12 MGD and a continuous wastewater (backwash) discharge of 0.6 MGD. Treatment process
for raw water consists of oxidation with potassium permanganate, taste and odor control with
powdered activated carbon, coagulation and sedimentation using aluminum sulfate and a
coagulant aid polymer. Sludge and filter backwash water is discharged to two lagoons, where
settling occurs and the supernate is dechlorinated then discharged into the UT to Coddle Creek.
The maximum, monthly average wastewater discharge between Oct 2015 and Oct 2018 was
approximately 0.9291 MGD.
Compliance History:
• Three NOV cases since last renewal; Two in 2018 for TSS limit, one in 2014 for Fluoride
limit. TSS, pH and Flow monitoring violation in Nov 2018.
• Within the past three years, the facility has failed three TOX tests; Jan 2016, Oct 2017,
Jul 2018.

RPA:
The maximum, monthly average wastewater discharge between Oct 2015 and Oct 2018 was
approximately 0.9291 MGD.
• Fluoride — reasonable potential to exceed water quality standards; maintaining current
limits and monthly monitoring.
• Iron — no reasonable potential, as there are no water quality standards currently. No
values were over 1 mg/L. Removing parameter from effluent table.
NCG59 General Permit Eligibility (for Conventional & Greensand WTPs):
• They've failed 3 TOX tests within the last 3 years (Oct 2015-Oct 2018), the most recent
failed test occurring in July 2018 — ineligible
• Fluoride limits required based on most recent RPA — ineligible
• Conclusion: Ineligible for NCG59 General Permit.
Changes from previous permit to draft:
• Updated permit map.
• Removed former footnote #4 stating "Parameters should be monitored in conjunction
with toxicity test.", as this is no longer required per 2009 Changes to WTP Strategy
Memo
• Removed Iron parameter in A(1) Effluent table. Application states Iron sulfate does not
have the potential to be discharged. As per "Assistance with BPJ on WTP renewals"
2012 Memo, Iron does not have a recommend limit and was monitoring only in previous
permit. All reported values in previous 4 '/2 years are < 1 mg/L.
• Removed daily max limit for Turbidity and updated monitoring frequency to 2/Monthly
per Table 5.1 in the "Assistance with BPJ on WTP renewals" 2012 Memo. Receiving
stream no longer impaired for Turbidity.
• Removed Zinc from A.(1) Effluent Table as permit application states Zinc -
orthophosphate or sweetwater CP1236 does not have the potential to be discharged.
Removed corresponding former footnote #2.
• Added regulatory citations
• Added eDMR footnote in A(1) and updated Section A(4).
• Updated former footnote #5 (now footnote #4) regarding WET testing.
• Updated information on Supplement to Cover Sheet to include max monthly average,
stream index, and HUC.
• Added facility grade in A(1)
• Added eDMR parameter codes to effluent table in Section A. (1)
• Updated measurement frequency for flow in A.(1) Effluent Table to continuous, per WTP
strategy as the facility discharges > 50,000 GPD.
• Removed former Section A. (3.) Permit Re -Opener — Whole Effluent Toxicity special
condition as the facility has passed > 75% of TOX tests in the last 3 years.
• Removed Ammonia Nitrogen from A.(1) Effluent Table as the application states that
ammonia nitrogen/chloramines do not have the potential to be discharged and is not

shown on the provided facility schematic. Corresponding former footnote #3 stating
"Facilities using chlorination will be required to monitor ammonia nitrogen on a quarterly
basis." has also been removed.
Changes from draft to final:
• None
Comments received on draft permit:
• None

Water Resources
ENWRONMEUTAL QUALITY
May 11, 2018
Christie Putnam
City of Concord
9000 Aviation Blvd
Concord, NC 28027
Subject: Permit Renewal
Application No. NCO083119
Coddle Creek WTP
Cabarrus County
Dear Applicant:
ROY COOPER
Garernar
h-UCHAEL S. REGAN
Secretary
L=A CULPEPPER
Interim Directar
The Water Quality Permitting Section acknowledges the May 10, 2018 receipt of your permit renewal application and
supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW
permitting branch. Per G.S. 150B-3 your current permit does not expire until permit decision on the application is made.
Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit.
The permit writer will contact you if additional information is required to complete your permit renewal. Please respond
in a timely manner to requests for additional information necessary to allow a complete review of the application and
renewal of the permit.
Information regarding the status of your renewal application can be found online using the Department of Environmental
Quality's Environmental Application Tracker at:
https•//deq nc gov/permits-regulations/permit-guidance/environmental-application-tracker
If you have any additional questions about the permit, please contact the primary reviewer of the application using the
links available within the Application Tracker.
Sincer
ely,
Wren Thedford
Administrative Specialist II
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919-807-6300

7 May 2018
NC DENR / DWR / NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Mr. Thedford:
p%ECiE EDjDE PJD\ Y n
MAY to 2019
N►ater Re g- tGes
Permilttmg
The City of Concord requests renewal of the NPDES permit for the Coddle Creek WTP. The current permit number
for Coddle Creek WTP is # NC0083119. There have been no changes at Coddle Creek WTP since the issuance of the
last permit. Thank you for your assistance with this matter.
Sincerely,
Christie Putnam
Water Resources Director,
City of Concord
Enclosures

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
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
Facility Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
City of Concord
Coddle Creek Water Treatment Plant
P.O. Box 308
Concord
North Carolina 28026
[phone]
[phone]
e-mail Address [e-mail]
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road
City
State / Zip Code
County
6935 Davidson Highway
Concord
North Carolina 28027
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 Id
Page 1 of 3 Version 5/2012

NPDES PERMIT APPLICATION - SNORT FORM C - WTP
For discharges associated with water treatment plants
5. Ty p f 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
7. 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
8. 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: 1
Outfall Identification number(s) 001
10. Frequency of discharge: Continuous [ Intermittent ❑
If intermittent:
Days per week discharge occurs: N/A Duration: N/A
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 e
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].
➢ Solids Handling Plan
16. NEW Applicants
Information needed in addition to items 1-15:
➢ New applicants are highly encouraged to 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.
name of Person Signing Title
ture of Ax @icant Date
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 Bio-Nomic Services, Inc. (516 Roundtree Road,
Charlotte, NC 28217-2133).
Sludge has been removed from the Coddle Creek lagoon approximately every 11/2 years. The
quantities of sludge average between 4500 — 5500 tons. The sludge is deposited at the BFI
landfill in Concord, NC.

City of Concord
Coddle Creek WTP
Latitude: 35' 25' 57" N
State Grid:
Concord
Longitude: 80' 41' 40" W
Permitted Flow:
100 MGD
Receiving stream: UT to Coddle Creek
Stream Class:
C
Drainage Basin: Yadkin -Pee Dee River Basin
Sub -Basin:
03-07-11
Facility
x
Location
not to scale
NPDES Permit No. NCO083119
North I I Cabarrus County

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Independent Tribune
Advertising Affidavit
PO Box 968
Hickory, NC 28603
NC DENR/DWQ
ATTN: WREN THEDFORD
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Number
3142720
Date
January 25, 2019
Date Category Description Ad Number Ad Size
01/25/2019 Legal Notices
1611 Oabserviceceohc
Pakigh,NC 2169�1611
Notice of Nlmt h Issue a IODES Wa9ewat� PaunN
De Nod Carolina Enuimnmenhl Management Commission proposes to
slue a 05 wastewater dhcWc peril to the perssc$) li ted below.
Wlittm commit regardiq the proposed permit will be a erfed red
10 days after the publish dale of this rroNce.1h Direct« of he NC W.
sianofWill Resoures(DWIlnoijMIipublic ho N sbould In be
i significant degree of public intereiL Please nail camrards and/or infor•
Ulan requesD to DWI it& gave addrn Irderes« persons may ds
R th DWR at 512 N. Salisbury Sbcef, Pill NC to review infolmili n
on file. AddOonal infomat'an on NPDES permit and din notice may be
Irmhoes,a ty cvling 119)101-OR the Cidl el Gomad has repl¢ded
mnewd of NW6 permit NNW 10I1119/Coddle CreeM F) in Will
County. facility discharges belted filter birldinh ton Unnamed tddub.
ry to Code CnekrYadkin-Pee Dee Over Basin. Curadv, tahl residual
chbdne a water Ill limited, the City of Concord Nis reQucetld re-
newal of NPOE cermR 01121191Coddle CA W? in Cabarrus Cwo.
ty, facility discharges Ireafed flier backwash to in Mind d bibutary to
Coddle CreeplYadkin•Pee Dee Over Basin Currently, tom/ reddud R-
ine is Wahl Ally limiled.
Public Notice North Carolina Environmental Management Comm 0000536521 2 x 28 L
Publisher of
Independent Tribune
Cabarrus County
Before the undersigned, a Notary Public of Iredell 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:
01/25/2019
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 Statutes of North Carolina.
Asststunt Bookkeeper
Newspaper reference: 0000536521
J Sworn to and subscribed before me, this _� day of`� 2019
QPs�Unmiifim��O /
Notary Public 6! i
a !
Nolory Publio
iredeu County
My Commission expires: % a17. ,-b@' )
—r— 10 P
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THIS IS NOT A BILL. PLEASE PAY FROM INVOICE, THANK YOU

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1. Project Information
]CHECK IF HQW OR ORW WQS
Facility Name
Par01
Coddle Creek WTP
WWTP/WTP Class
PC-1
Par02
NPDES Permit
NCO083119
Par03
Outfall
001
Par04
Flow, Qw (1
0.929
Par05
Receiving Stream
UT to Coddle Creek
Par06■
HUC Number
03040105
Par07
Stream Class
C
0.00
Par08
Par09
Par10
]Apply WS Hardness WQC
7Q10s (cfs)
7Q10w (cfs)
0.00
Par11
311 (cfs)
0.00
Par12
QA (cfs)
0.00
Par13
1Q10s (cfs)
Par14
Par15
0.00
Effluent Hardness
NO EFFLUENT HARDNESS DATA
-----------------------------------
Upstream Hardness
NO UPSTREAM HARDNESS DATA
I Par16
-----------------------------------
Combined Hardness Chronic
--
DATA INCOMPLETE
I Par17
-- —
Combined Hardness Acute
----- ---------- ----
-- DATA INCOMPLETE ------I
I
Par18
I Par19
Par20
Data Source(s)
❑CHECK TO APPLY MODEL
Par21
Par22
Par23
Par24
Table 2. Parameters of Concern
Name WQS Type Chronic Modifier Acute i Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
Hi
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic Life
NC
NO DATA
FW
NO DATA
ug/L
Chlorides
Aquatic Life
NC
230
FW
mg/L
11, Chlorinated Phenolic Compounds
Water supply
NC
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
NC
300
A
ug/L
Chromium III
Aquatic Life
NC
NO DATA
FW
NO DATA
ug/L
Chromium VI
Aquatic Life
NC
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
NO DATA
FW
NO DATA
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Life
NC
1,800
FW
ug/L
Lead
Aquatic Life
NC
NO DATA
FW
NO DATA
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
ng/L
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
NO DATA
FW
NO DATA
pg/L
Nickel
Water Supply
INC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
INC
5
FW
56
ug/L
Silver
Aquatic Life
NC
0.06
FW
NO DATA
ug/L
Zinc
Aquatic Life
NC
NO DATA
FW
NO DATA
ug/L
Iron
Aquatic Life
NC
1
FW
mg/L
83119 RPA, input
4/1 /2019

Coddle Creek WTP
NCO083119
Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM
Qw (MGD) =
0.9292
1Q10S (cfs) =
0.00
7Q10S (cfs) =
0.00
7Q10W (cfs) =
0.00
30Q2 (cfs) =
0.00
Avg. Stream Flow, QA (cfs) =
0.00
Receiving Stream:
UT to Coddle Creek HUC 03040105
DATA POINTS = 58
WWTP/WTP Class: PC-1
IWC% @ 1Q10S =
100
IWC% @ 7Q10S =
100
IWC% @ 7Q10W =
100
1WC% @ 30Q2 =
100
IW%C @ QA =
100
Stream Class:
C
Outfall 001
Qw = 0.92915 MGD
COMBINED HARDNESS (me/L)
NO DATA
NO DATA
PARAMETER
NC STANDARDS OR EPA CRITERIA
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
o
Applied
Chronic Acute
n # Det. Max Pred Cw Allowable Cw
Standard
Acute: NO WQS
Fluoride
NC
1800 FW
ug L
54 4
3,360.0
Chronic: 1,800.0
RP shown - apply Monthly Monitoring with Limit
1 values > Allowable Cw
Acute: NO WQS
Iron
NC
1 FW
mg/L
18 12
0.61451
___ _ ____ _ _ _
Chronic: 0
_ _ _ _ _ _ _ _ _ _______
No RP shown - no monitoring required.
w
No value > Allowabllee CCw
Acute:
0 0
N/A
—
-Chronic: - — - — - — - — - —
--------------------------
Acute:
0 0
N/A
_ __________
Chronic:
Acute:
0 0
N/A
_ __________
Chronic:
83119 RPA, rpa
Page 3 of 3 4/1/2019

REASONABLE POTENTIAL ANALYSIS
3
Fluoride
Date
Data
BDL=1/2DL
Results
1
6/10/2014
3200
3200
Std Dev.
2
7/8/2014
<
500
250
Mean
3
8/5/2014
<
500
250
C.V.
4
9/2/2014
<
500
250
n
5
10/21 /2014
<
500
250
6
11/4/2014
660
660
Mult Factor =
7
12/2/2014
<
500
250
Max. Value
8
1/20/2015
<
500
250
Max. Pred Cw
9
2/3/2015
<
500
250
10
3/3/2015
<
500
250
11
4/7/2015
<
500
250
12
5/12/2015
<
500
250
13
6/2/2015
<
500
250
14
7/28/2015
<
500
250
15
8/4/2015
<
500
250
16
9/8/2015
<
500
250
17
10/13/2015
<
500
250
18
11 /3/2015
<
500
250
19
12/8/2015
<
500
250
20
1/19/2016
<
500
250
21
2/9/2016
<
500
250
22
3/1/2016
<
500
250
23
4/19/2016
<
500
250
24
5/3/2016
<
500
250
25
6/7/2016
<
500
250
26
7/19/2016
<
500
250
27
8/2/2016
<
500
250
28
9/6/2016
<
500
250
29
10/18/2016
<
500
250
30
11 /1 /2016
<
500
250
31
12/6/2016
<
500
250
32
1/17/2017
<
500
250
33
2/7/2017
<
500
250
34
3/7/2017
<
500
250
35
4/18/2017
<
100
50
36
5/2/2017
<
100
50
37
6/6/2017
<
100
50
38
7/18/2017
<
100
50
39
8/1/2017
<
100
50
40
9/5/2017
<
100
50
41
10/3/2017
<
100
50
42
11/7/2017
<
100
50
43
12/5/2017
<
100
50
44
1/9/2018
<
100
50
45
2/6/2018
<
100
50
46
3/6/2018
<
100
50
47
4/2/2018
<
100
50
48
5/1/2018
<
100
50
49
6/5/2018
<
100
50
50
7/3/2018
110
110
51
8/7/2018
110
110
52
9/5/2018
<
100
50
53
10/2/2018
<
100
50
54
11/6/2018
<
100
50
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58 Pa7
240.3704
1.7729
54
1.05
3200.0 ug/L
3360.0 ug/L
Use "PASTE SPECIAL
Iron Values" then "COPY"
. Maximum data
points = 58
Date Data
BDL=1/2DL
Results
1
7/8/2014 <
0.06
0.03
Std Dev.
2
10/21/2014
0.109
0.109
Mean
3
1/20/2015
0.105
0.105
C.V.
4
4/7/2015
0.101
0.101
n
5
7/28/2015
0.172
0.172
6
10/13/2015
0.193
0.193
Mult Factor =
7
1/19/2016
0.164
0.164
Max. Value
8
4/19/2016
0.076
0.076
Max. Pred Cw
9
7/19/2016
0.068
0.068
10
10/18/2016 <
0.05
0.025
11
1/17/2017
0.0797
0.0797
12
4/18/2017 <
0.05
0.025
13
7/18/2017 <
0.05
0.025
14
10/3/2017 <
0.05
0.025
15
1/9/2018 <
0.05
0.025
16
4/2/2018
0.377
0.377
17
7/10/2018
0.102
0.102
18
10/2/2018
0.343
0.343
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
0.1136
0.9197
18
1.63
0.377000 mg/L
0.614510 mg/L
83119 RPA, data
1 4/1/2019

IWC Calculations
Coddle Creek WTP
NC0083119
Prepared By: Sydney Carpenter, NPDES Program
Enter Design Flow (MGD): 0.92915
Enter s7Q10(cfs): 0
Enter w7Q10 (cfs): 0
Residual Chlorine
Ammonia (NH3 as N)
(summer)
7Q10 (cfs)
0
7Q10 (CFS)
0
DESIGN FLOW (MGD)
0.92915
DESIGN FLOW (MGD)
0.92915
DESIGN FLOW (cfs)
1.4401825
DESIGN FLOW (cfs)
1.44018
STREAM STD (ug/L)
17.0
STREAM STD (mg/L)
1.0
UPS BACKGROUND LEVEL (1
0
UPS BACKGROUND LEVEL (mg/L)
0.22
IWC (%)
100.00
IWC (%)
100.00
Allowable Conc. (ug/1)
17
Allowable Conc. (mg/1)
1.0
Ammonia (NH3 as N)
(winter)
7Q10 (CFS)
0
Fecal Limit
200/100ml
DESIGN FLOW (MGD)
0.92915
(If DF >331; Monitor)
DESIGN FLOW (cfs)
1.44018
(If DF <331; Limit)
STREAM STD (mg/L)
1.8
Dilution Factor (DF)
1.00
UPS BACKGROUND LEVEL (mg/L)
0.22
IWC (%)
100.00
Allowable Conc. (mg/1)
1.8
INPDES Servor/Current Versions/IWC
4/1/2019

Whole Effluent Toxicity Testing and Self Monitoring Summary
CMUD-McAlpine WWTP
NCO024970/001
County: Mecklenburg
Ceri7dPF
Begin:
10/1/2017 chr lim: 90%
NonComp:
Single
J
F M
A
M
2015
>100(P) Pass(s)
2016
H
Pass(s)
2017
Pass(s)
2018
Pass(s) >100(P)
I
CMUD-McDowell Cr. WWTP
NCO036277/001
County: Mecklenburg
Ceri7dPF
Begin:
1/1/2014 chr lim.: 90%
NonComp:
Single
J
F M
A
M
2015
Pass(s)
Pass(s)
2016
Pass Invalid
Pass
2017
Pass(s)
Pass(s)
2018
92.5(P) Pass(s)
Pass(s)
CMUD-Sugar Cr. WWTP
NCO024937/001
County: Mecklenburg
Ceri7dPF
Begin:
10/1/2017 chr lim: 90%
NonComp:
Single
J
F M
A
M
2015
Fail(s) >100(P) Pass >100
>100(s)
Pass(s)
2016
Pass(s) -
Pass(s)
2017
Pass(s)
Pass(s)
2018
Pass >100(P) -
Pass(s)
CNA Holdings, Inc.(Ticona Facility) NC0004952/001
County: Cleveland
Ceri7dPF
Begin:
11/1/2013 chr lim: 2.13%
NonComp:
Single
J
F M
A
M
2015
Pass
2016
Pass
2017
Pass
2018
Pass
Coats American -Sevier Plant
NC0004243/001
County: McDowell
Ceri7dPF
Begin:
12/1/2017 chr lim: 15%
NonComp:
Single
J
F M
A
M
2015
Pass -
-
Pass
2016
Fail >30
25.98
Pass
2017
Pass -
-
Pass
2018
Pass -
Pass
Coddle Creek WTP
NCO083119/001
County: Cabarrus
Ceri7dPF
Begin:
12/1/2013 Chr Monit: 90%
NonComp:
J
F M
A
M
2015
Fail
Fail
2016
Fail
Pass
2017
Pass
Pass
2018
Pass
Pass
Region:
MRO
Basin: CTB34
Mar Jun Sep Dec
SOC JOC:
7Q10:
0.3
PF: 64.0 IWC:
99.35 Freq: Q
J
J
A
S
O N
Pass(s)
Pass(s)
-
Pass(s)
Pass(s)
Pass(s)
Pass(s)
Pass(s)
Pass
-
Region:
MRO
Basin: CTB33
Jan Apr Jul Oct
SOC JOC:
7Q10:
1.80
PF: 12.0 IWC:
85 Freq: Q
J
J
A
S
O N
Pass
Pass(s)
Pass(s)
Pass(s) >100(P)
Pass(s)
Pass
92.5(P)
Pass(s)
Pass(s)
Region:
MRO
Basin: CTB34
Feb May Aug Nov
C_JOC:
K.SO
7Q10:
3.4
PF: 20.0 IWC:
90 Freq: Q
J
J
A
S
O N
- Pass(s)
Pass(s) >100(P)
Pass(s)
Pass(s)
Pass(s) >100(P)
Pass
Pass
Region:
MRO
Basin: BRD05
Mar Jun Sep Dec
SOC JOC:
7Q10:
20.0
PF: 0.45 IWC:
5.8 Freq: Q
J
J
A
S
O N
Pass
Pass
-
Pass
Pass
Pass
Pass
Pass
Pass
-
Region:
ARO
Basin: CTB30
Feb May Aug Nov
SOC JOC:
7Q10:
18.0
PF: 2.0 IWC:
14.7 Freq: Q
J
J
A
S
O N
Pass Pass
Pass
- Pass
Pass
Pass
Pass
Pass
Pass
- Pass
Region:
MRO
Basin: YAD11
Jan Apr Jul Oct
SOC JOC:
7Q10:
PF: 0.30 IWC:
Freq: Q
J
J
A
S
O N
Fail
Pass
Pass
Pass
Pass
Fail
Fail
Pass
D
Pass(s)
Pass(s)
Pass(s) >100(P)
Pass(s)
C
D
Pass
Pass
Pass
Pass
r
C
Leeend: P= Fathead minnow (Pimohales oromelas). H=No Flow (facility is active). s = Split test between Certified Labs Page 20 of 108