NC0074772_Fact Sheet_20210604

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NCDEQ / DWR / NPDES
COMPLEX -EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NC0074772
Emily Richards, Compliance & Expedited Permitting Unit / 919-707-9125 Feb2021
Table 1 - Facility Information
Applicant/Facility Name
AQUA North Carolina, Inc.
Diamond Head Subdivision WWTP, Class 2
Applicant Address
202 Mackenan Court, Cary, NC 27511
Facility Address
799 Williamson Road, Mooresville
Permitted Flow (MGD)
Phase 1: 0.0731 MGD, and Phase 2: 0.100 MGD
Type of Waste
Discharging 100% domestic < 1MGD
Facility Class
WW-2
County
Iredell
Permit Status
Renewal
Regional Office
MRO
Stream Characteristics
Receiving Stream
Lake Norman
[Reeds Creek Arm]
Stream
Classification
WS-IV; B; CA
Stream Segment
11-(75)
Drainage basin
Catawba
Summer 7Q10 (cfs)
(calculated in RPA based
on dilution model)
Subbasin
03-08-32
Winter 7Q10 (cfs)
—
Use Support
Statewide advisory for Hg
[HH for fish consumption]
30Q2 (cfs)
—
303(d) Listed
Average Flow (cfs)
—
State Grid
E15SE
IWC (%) Phase 1 & 2
15%
USGS Quad
Mooresville, NC
Facility Summary — This facility is a privately owned minor WWTP (flow <1 MGD) receiving 100%
domestic wastewater, plus a uranium -filter generated backwash from ion -exchange (IE) treatment of
potable -water. The WWTP's extended -aeration treatment system is currently designed for a maximum
capacity of 0.0731 MGD, but is permitted to expand to a 2nd phase not -to -exceed 0.100 MGD. Expansion
requires the Division's Authorization to Construct (ATC). This WWTP utilizes the following treatment
units:
• influent includes trucked -in filter backwash from potable -water treatment [ion -
exchange technology] from Subdivision wells
• influent bar screen
• V-notch weir
• flow -equalization tank
• aeration basin
• clarifier
• aerated sludge holding tank
• tertiary filters
• tablet chlorination / tablet de -chlorination
• post aeration
• flow recorder
• effluent pump station
• standby power generator
Fact Sheet for Permit Renewal
Feb 2021 -- NPDES Permit NC0074772 - Page 1

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Permit Flow Conditions — Effluent flow is permitted as Phase 1 and Phase 2 (see Part I), and limited at
0.0731 MGD and 0.100 MGD [A. (1.)]. Upon reaching flow at 80% of Phase ldesign capacity, the
Permittee shall have submitted plans and specifications to the Division to upgrade the treatment system in
support of its application to expand to Phase 2. Expansion requires the Division's Authorization to
Construct (ATC) permit and subsequent submittal of an Engineer's Certification Form (see Supplement to
Permit Cover Sheet).
Renewal Summary — This renewal required adjustments to limits based on new knowledge of dilution
available in Lake Norman. Previously, no dilution credit was given in calculating limits for metals or other
parameters. Aqua submitted a CORMIX model in January 2020 which demonstrated that dilution is
available in Lake Norman.
Proposed Changes:
- the component list on the supplement to cover page was updated to include only one
aerator and one clarifier
- The effluent table was split into two sections (A.(1.) and A.(2.)) corresponding to the
two separate flow tiers
- Limits for Copper, Fluoride, Chlorides, and Zinc were removed, because they did not
demonstrate reasonable potential to exceed applicable water quality standards/criteria.
Quarterly monitoring for these parameters will remain.
- Monthly effluent monitoring was added for Salinity, Conductivity, and Total Dissolved
Solids. Monitoring for these parameters is required for all facilities discharging treated
backwash from ion -exchange technology.
- The Chronic Toxicity Permit Limit (Quarterly) section (previously section A.(2.))
previously required Chronic wet testing without dilution credit (IWC= 90%). The
correct dilution credit (now IWC=15%) has been applied (A. (3.)).
- Section A. (6.) Electronic Reporting of Discharge Monitoring Reports is updated to
reflect current federal requirements.
CORMIX Model -
The model that was submitted suggests a dilution factor of 10 for the current flow tier (0.0731 MGD).
However, it should be noted that the permittee did not use 0.0731 MGD as their discharge rate when
conducting their model. The permittee first calculated a maximum pumping rate of 87 gpm (0.125 MGD)
and determined that this rate of flow created a high velocity jet which resisted mixing. This discharge rate
resulted in a dilution factor of 6.5.
To achieve desired results, Aqua personnel throttled the discharge rate to 40 gpm (0.0576 MGD). The lower
velocity jet allowed for rapid mixing, resulting in a dilution factor of 10 at the end of the near field region.
The permitted max discharge rate for the current flow tier is 0.0731 MGD (-61 gpm). This means that the
proposed dilution factor (S =10 at 40 gpm) does not adequately describe the maximum potential flow at this
current tier. In order to best protect surface water quality, DWR determined that the lower dilution factor
(S=6.5) is more appropriate. Applying the more stringent dilution credit did not cause the facility to trigger
any reasonable potential for violation of water quality standards.
The dilution factor of 6.5 should be used to evaluate reasonable potential to exceed water quality standards
at both flow tiers.
Radiological POCs — Radiological POCs (see Table 3.) are added to Part I Section A. (1.) in accordance
with the Division's memo dated December 5, 2005 for Disposal Wastewater Associated with Private Water
Supply Wells (with potential radiology components). The Division applies permit limits to these POCs
without benefit of dilution. North Carolina Narrative Standards 15A NCAC 02B .0211 (17) for
Radiological POCs address maximum contaminant levels (MCLs). The MCL of 30 µg//L for Uranium is
Fact Sheet for Permit Renewal
Feb 2021 -- NPDES Permit NC0074772 - Page 2

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
based on EPA Federal Criteria [40 CFR 141.66]; see federal guidance and rules EPA 816-F-01-003 and 40
CFR Parts 9, 141, and 142.
Table 3: Radiological POCs
EFFLUENT
CHARACTERISTICS
[Parameter Codes]
LIMITS
MONITORING REQUIREMENTS
Measurement
Frequency
Sample
Type
Sample
Location
Combined radium-226 and radium-228
1 2
(pCi/L)
11503
5 pCi/L
(report annual average)
Quarterly
Grab
Effluent
Alpha emitters, excluding radon and
1 2
uranium (pCi/L)
82077
I S pCi/L
p
(report annual average)
Quarterly
Grab
Effluent
Beta emitters, excluding potassium-40
and other naturally occurring
radionuclides (pCi/L) 1' 2
03520
50 pCi/L
(report annual average)
Quarterly
Grab
Effluent
Strontium-90 (pCi/L)1' 2
13501
8 pCil/I
(report weekly average)
Quarterly
Grab
Effluent
Tritium (pCi/L)1' 2
82126
20,000 pCi/L
(report annual average)
Quarterly
Grab
Effluent
Uranium (µg/L)1' 3
22708
30 L
(report weekly / average)
Quarterly
Grab
Effluent
Table 3 Footnotes:
1. All quarterly samples shall be taken 72 to 80 hours after the introduction of offsite wastewater into the
equalization tank. If an introduction of offsite wastewater does not occur within a given quarter, a sample shall
be taken of the effluent and noted on the DMR as "No introduction of offsite wastewater occurred for this
quarter."
2. If the quarterly value exceeds 4 times the annual average limit, then (a) the sampling frequency shall increase to
Monthly and (b), a written notification shall be sent to the Water Quality Permitting Section and the
Mooresville Regional Office (MRO).
3. A Weekly Average value can be determined from one quarterly sample, or it can be determined from the
average of multiple samples taken during a period not to exceed seven (7) consecutive days during the quarter.
Water Treatment Plant (WTP) Strategy — This permit combines the Division's WTP strategies
(Oct2009, amended Jun2012) with WWTP strategies to accommodate complex metals influent (Table 4).
This includes monitoring only for dissolved metals with their newly promulgated surface water standards
for freshwater [see permit Part I, A. (1.)]. The influent volume for these metals (max 500 gpd) is judged
insignificant (< 0.01 %) to the average WWTP flow. Likewise, other WTP POCs (Turbidity, Salinity and
Conductivity) were deemed insignificant to average inflow.
Quarterly Whole Effluent Toxicity (WET) Testing — In accordance with current strategies designating
this influent as a "complex waste stream," WET testing is required in this permit as fresh water Chronic
[TGP3B] Quarterly monitoring [15A NCAC 02B .0200 et seq.] at an effluent concentration of 90% (to be
changed to a lower IWC in this renewal, based on dilution). All tests have been passed during this permit
cycle.
Using information from the recently submitted dilution model, this renewal modifies WET testing
requirements to an effluent concentration of 15%. (A. (3.).
Fact Sheet for Permit Renewal
Feb 2021 -- NPDES Permit NC0074772 - Page 3

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
RPA /WOBELs for Hardness -Dependent Metals - Freshwater
The need for toxicant limits is based upon a demonstration of reasonable potential to exceed water quality
standards, a statistical evaluation that is conducted during every permit renewal utilizing the most recent
effluent data for each outfall. The RPA is conducted in accordance with 40 CFR 122.44 (d) (i). The NC
RPA procedure utilizes the following: 1) 95% Confidence Level/95% Probability; 2) assumption of zero
background; 3) use of/2 detection limit for "less than" values; and 4) streamflows used for dilution
consideration based on 15A NCAC 2B.0206. Effective April 6, 2016, NC began implementation of
dissolved metals criteria in the RPA process in accordance with guidance titled NPDES Implementation of
Instream Dissolved Metals Standards, dated June 10, 2016.
A reasonable potential analysis was conducted on effluent toxicant data collected between June 2016 and
Dec 2020. Pollutants of concern included toxicants with positive detections and associated water quality
standards/criteria. Based on this analysis, the following permitting actions are proposed for this permit:
Monitoring Only: The following parameters will receive a monitor -only requirement since they did not
demonstrate reasonable potential to exceed applicable water quality standards/criteria: Chlorides, Copper,
Fluoride, Zinc.
The predicted maximums for these parameters were < 50% of allowable concentrations. Monitoring will be
retained in the permit at the request of Mooresville regional office.
Effluent Data Summary June 2016 - Dec 2020
Parameter
00010 - Temperature, Water Deg. Centigrade
00300 - Oxygen, Dissolved (DO)
00400 - pH
00900 - Hardness, Total (as CaCO3)
00940 - Chloride (as CI)
00951 - Fluoride, Total (as F)
01042 - Copper, Total (as Cu)
01092 - Zinc, Total (as Zn)
03520 - Radiation,gross beta
11503 - Radium 226 + radium 228, total
13501 - Strontium 90, total
22708 - Uranium, Natural, Total
31616 - Coliform, Fecal MF, MFC Broth, 44.5 C
50050 - Flow, in conduit or thru treatment plant
50060 - Chlorine, Total Residual
82077 - Radiation, gross alpha
82126 - Tritium, total
C0310 - BOD, 5-Day (20 Deg. C) - Concentration
C0530 - Solids, Total Suspended - Concentration
C0600 - Nitrogen, Total - Concentration
C0610 - Nitrogen, Ammonia Total (as N) - Concentration
C0665 - Phosphorus, Total (as P) - Concentration
TGP3B - Pass/Fail Static Renewal 7Day Chronic Ceriodaphnia
Mean Min Max N
19.88 7.00 113.00 246
9.06 5.80 15.80 242
7.48 6.50 8.40 242
138.33 116.00 168.00 15
84.29 59.00 148.00 14
433.86 157.00 573.00 14
12.53 5.00 27.00 15
70.00 48.00 113.00 15
13.90 9.83 29.40 14
0.66 0.02 1.21 14
0.78 0.05 1.36 14
2.02 0.15 16.20 14
- 1.00 320.00 241
0.03 0.00 0.09 1675
21.50 15.00 48.00 480
2.40 0.53 14.10 14
28.69 -88.50 150.00 14
2.99 2.00 12.40 240
4.61 2.50 18.00 240
13.50 1.81 22.08 28
0.34 0.20 4.05 240
4.69 1.73 11.30 28
1.00 1.00 1.00 28
Fact Sheet for Permit Renewal
Feb 2021 -- NPDES Permit NC0074772 - Page 4

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1. Project Information
Facility Name
WWTP/WTP Class
NPDES Permit
Outfall
Flow, Qw (MGD)
Receiving Stream
HUC Number
Stream Class
❑ CHECK IF HQW OR ORW WQS
Aqua NC Inc - Diamondhead WWTP
WW-2
NC0074772
001
0.073
Lake Norman
030501011203
❑✓ Apply WS Hardness WQC
7Q10s (cfs)
7Q10w (cfs)
30Q2 (cfs)
QA (cfs)
1Q10s (cfs)
WS-IV, B; CA
0.62
0.62
0.00
0.00
Effluent Hardness
Upstream Hardness
Combined Hardness Chronic
Combined Hardness Acute
default 99 mg/L-WS (Eff Hard Avg = 138.33 mg/L)
38.93 mg/L (Avg)
48.17 mg/L
39.96 mg/L
Data Source(s)
0 CHECK TO APPLY MODEL
Model 7Q10s not entered
Calculated 7Q10s = 0.6232 cfs
To appy a Model IWC %: Once the
Table 2. Parameters of Concern
Par01
Par02
Par03
Par04
Par05
Par06
Par07
Par08
Par09
Par10
Par11
Par12
Par13
Par14
Par15
Par16
Par17
Par18
Par19
Par20
Par21
Par22
Par23
Par24
Name
WQS
Type Chronic Modifier
Acute
PQL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
HH/WS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic Life
NC
0.9684
FW
4.8784
ug/L
Chlorides
Aquatic Life
NC
230
FW
mg/L
Chlorinated Phenolic Compounds
Water Supply
NC
1
A
ug/L
4 Total Phenolic Compounds
Aquatic Life
NC
300
A
ug/L
Chromium III
Aquatic Life
NC
201.4550
FW
1328.8818
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
13.8024
FW
16.2899
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
6.1269
FW
127.6940
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
ng/L
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
64.8456
FW
498.4397
pg/L
Nickel
Water Supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
ug/L
Silver
Aquatic Life
NC
0.06
FW
0.6640
ug/L
Zinc
Aquatic Life
NC
220.9194
FW
187.0318
ug/L
Uranium
Human Health
C
30
HH
pg/L
Copy of NC0074772 RPA 2020, input
3/3/2021

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
REASONABLE POTENTIAL ANALYSIS
H1
Effluent Hardness
Date Data BDL=1/2DL Results
1 9/20/2017 168 168 Std Dev.
2 12/20/2017 124 124 Mean
3 3/22/2018 132 132 C.V.
4 6/14/2018 136 136 n
5 7/18/2018 148 148 10th Per value
6 10/17/2018 152 152 Average Value
7 11/15/2018 126 126 Max. Value
8 2/27/2019 116 116
9 4/17/2019 138 138
10 7/10/2019 150 150
11 10/8/2019 140 140
12 1/23/2020 120 120
13 4/16/2020 122 122
14 7/14/2020 138 138
15 10/13/2020 165 165
16
17
18
19
20
21
22
23
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25
26
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28
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31
32
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40
41
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48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL.
Values" then "COPY"
. Maximum data
points = 58
H2
Upstream Hardness
15.8460
138.3333
0.1145
15
120.80 mg/L
138.33 mg/L
168.00 mg/L
Date Data BDL=1/2DL Results
1 9/20/2017 9 9 Std Dev.
2 12/20/2017 9 9 Mean
3 6/14/2018 23 23 C.V.
4 7/18/2018 35 35 n
5 10/17/2018 17 17 10th Per value
6 11/15/2018 11 11 Average Value
7 2/27/2019 32 32 Max. Value
8 4/17/2019 39 39
9 7/10/2019 50 50
10 10/8/2019 40 40
11 1/23/2020 41 41
12 4/16/2020 39 39
13 7/14/2020 35 35
14 10/13/2020 165 165
15
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51
52
53
54
55
56
57
58
Use "PASTE SPECIAL.
Values" then "COPY"
. Maximum data
points = 58
38.6373
38.9286
0.9925
14
9.60 mg/L
38.93 mg/L
165.00 mg/L
-3-
Copy of NC0074772 RPA 2020, data
3/3/2021

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
REASONABLE POTENTIAL ANALYSIS
Par05
Chlorides
Date Data BDL=1/2DL Results
1 9/20/2017 84 84 Std Dev.
2 12/20/2017 148 148 Mean
3 3/22/2018 88 88 C.V.
4 7/18/2018 64 64 n
5 10/17/2018 96 96
6 11/15/2018 85 85 Mult Factor =
7 2/27/2019 62 62 Max. Value
8 4/17/2019 76 76 Max. Pred Cw
9 7/10/2019 84 84
10 10/8/2019 84 84
11 1/23/2020 59 59
12 4/16/2020 110 110
13 7/14/2020 78 78
14 10/13/2020 62 62
15
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39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL -
Values" then "COPY" .
Maximum data points =
58
Pal
Copper
23.2459
84.3
0.2758
14
1.2
148.0 mg/L
182.0 mg/L
Use"PASTE SF
Values" then "i
. Maximum c
points = 5
Date Data BDL=1/2DL Results
1 9/20/2017 10 10 Std Dev. 5.2626
2 12/20/2017 9 9 Mean 12.5333
3 3/27/2018 8 8 C.V. 0.4199
4 6/14/2018 10 10 n 15
5 7/18/2018 12 12
6 10/17/2018 27 27 Mult Factor = 1.34
7 11/15/2018 14 14 Max. Value 27.00
8 2/27/2019 9 9 Max. Pred Cw 36.18
9 4/17/2019 15 15
10 7/10/2019 15 15
11 10/8/2019 18 18
12 1/23/2020 12 12
13 4/16/2020 9 9
14 7/14/2020 5 5
15 10/13/2020 15 15
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-4-
Copy of NC0074772 RPA 2020, data
3/3/2021

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
REASONABLE POTENTIAL ANALYSIS
'ECIAL•
COPY"
late
Par13
Fluoride
i8 ,Date Data BDL=1/2DL Results
1 9/20/2017 454 454 Std Dev.
2 12/20/2017 157 157 Mean
3 3/27/2018 528 528 C.V.
4 6/14/2018 342 342 n
5 7/18/2018 444 444
6 10/17/2018 573 573 Mult Factor =
ug/L 7 2/27/2019 407 407 Max. Value
ug/L 8 4/17/2019 248 248 Max. Pred Cw
9 7/10/2019 506 506
10 10/8/2019 553 553
11 1/23/2020 563 563
12 4/16/2020 361 361
13 7/14/2020 427 427
14 10/13/2020 511 511
15
16
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49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL.
Values" then "COPY"
. Maximum data
points = 58
Par21
Zinc
122.9345
433.8571
0.2834
14
1.24
573.0 ug/L
710.5 ug/L
Use "PASTE SF
Values" then ".
. Maximum c
points = 5
Date Data BDL=1/2DL Results
1 9/20/2017 90 90 Std Dev. 18.5549
2 12/20/2017 74 74 Mean 70.0000
3 3/27/2018 78 78 C.V. 0.2651
4 6/14/2018 49 49 n 15
5 7/18/2018 61 61
6 10/17/2018 91 91 Mult Factor = 1.21
7 11/15/2018 50 50 Max. Value 113.0
8 2/27/2019 48 48 Max. Pred Cw 136.7
9 4/17/2019 64 64
10 7/10/2019 85 85
11 10/8/2019 67 67
12 1/23/2020 64 64
13 4/16/2020 63 63
14 7/14/2020 53 53
15 10/13/2020 113 113
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-5-
Copy of NC0074772 RPA 2020, data
3/3/2021

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
REASONABLE POTENTIAL ANALYSIS
'ECIAL•
COPY" 0
iata
i8 ,Date Data BDL=1/2DL Results
1 9/20/2017 1.53 1.53 Std Dev. 4.1376
2 12/13/2017 1.52 1.52 Mean 1.9914
3 3/14/2018 1.03 1.03 C.V. 2.0777
4 6/13/2018 0.152 0.152 n 14
5 9/12/2018 1.79 1.79
6 10/10/2018 16.2 16.2 Mult Factor = 2.73
ug/L 7 1/9/2019 < 0.532 0.266 Max. Value 16.200000
ug/L 8 4/10/2019 1.32 1.32 Max. Pred Cw 44.226000
9 9/4/2019 < 0.248 0.124
1012/4/2019 0.647 0.647
11 3/4/2020 0.362 0.362
12 5/6/2020 0.808 0.808
13 9/2/2020 1.9 1.9
14 12/2/2020 0.231 0.231
Par22
15
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56
57
58
points = 58
Use "PASTE SPECIAL. Par24
Values" then "COPY"
. Maximum data
0
1
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Date Data BDL=1/2DL Results
Std Dev.
Mean
C.V.
n
Mult Factor =
Max. Value
Max. Pred Cw
-6-
Copy of NC0074772 RPA 2020, data
3/3/2021

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Aqua NC Inc - Diamondhead WWTP
NC0074772 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Qw (MGD) = 0.07
1Q10S (cfs) = NO 1Q10s DATA
7Q1OS (cfs) = 0.62
7Q1OW (cfs) = 0.62
30Q2 (cfs) = 0.00
Avg. Stream Flow, QA (cfs) = 0.00
Receiving Stream: Lake Norman HUC 030501011203
USING MODEL
USING MODEL
USING MODEL
USING MODEL
USING MODEL
WWTP/WTP Class: WW-2
IWC% @ 1Q10S = N/A
IWC% @ 7Q1OS = 15.38414539
IWC% @ 7Q1OW = 15.38414539 IWC EQUAL?
IWC% @ 30Q2 = 100
IW%C@QA= 100
Stream Class: WS-IV, B; CA
Outfall 001
Qw = 0.0731 MGD
COMBINED HARDNESS (m2/L1
Acute = 39.96 mg/L
Chronic = 48.17 mg/L
YOU HAVE DESIGNATED THIS RECEIVING
STREAM AS WATER SUPPLY
Effluent Hard: 15 value > 100 mg/L
default 99 mg/L-WS (Eff Hard Avg = 138.33 mg/L)
PARAMETER
TYPE
(1)
NC STANDARDS OR EPA CRITERIA
a
co
n
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
Chronic
Standard Applied
Acutc
n
# Det. Max Pred Cw Allowable Cw
Chlorides
NC
230
FW(7Q10s)
mg/L
14
14
182.0
Acute: NO WQS
___ _ ____ _ ___
Chronic: 1,495.0
No value > Allowable Cw
_ ___ _ _ _ _ _ _ _ _ _
No RP, Predicted Max < 50% of Allowable Cw - No
Monitoring required
Copper
NC
13.8024
FW(7Q10s)
16.2899
ug/L
15
15
36.18
Acute: IWC/DATA?
_ _ _ _ _ _ _ _ _ _ _ _
Chronic: 89.72
No value > Allowable Cw
_ _ _ _ _ _ _ _ _ _ _ _ _
No RP, Predicted Max < 50% of Allowable Cw - No
Monitoring required
Fluoride
NC
1800
FW(7Q10s)
ug/L
14
14
710.5
Acute: NO WQS
_ _ _ _ _ _ _ _ _ _ _
Chronic: 11,700.4
No value > Allowable Cw
_ _ _ _ _ _ _ _ _ _ _ _ _
No RP, Predicted Max < 50% of Allowable Cw - No
Monitoring required
Zinc
NC
220.9194
FW(7Q10s)
187.0318
ug/L
15
15
136.7
Acute: IWC/DATA?
_ _ _ _ _ _ _ _ _ _ _ _
Chronic: 1,436.0
No value > Allowable Cw
_ _ _ _ _ _ _ _ _ _ _ _ _
No RP, Predicted Max < 50% of Allowable Cw - No
Monitoring required
Page 8 of 8
Copy of NC0074772 RPA 2020, rpa
3/3/2021

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
From: Cook, Clinton
To: DelDuco, Emily
Subject: RE: PWS approval for Draft NPDES Permit
Date: Thursday, June 3, 2021 3:58:16 PM
Attachments: image001.pnq
Emily,
I appreciate the opportunity to review the subject draft NPDES permit and have included my
response below in bold to satisfy the new paperless standards.
I concur with issuance of the above permit as I have no appreciable expertise in implementation
of the Clean Water Act requirements and have minimal understandine_of the information
provided. As a result, I have no basis for opposing the permit.
If you have any questions or need any additional information, please let me know.
Sincerely,
Clint
Clinton O. Cook, PE
Regional Engineer
Division of Water Resources — Public Water Supply Section
North Carolina Department of Environmental Quality
704 663 1699 office
704 663 6040 fax
[e-mail]
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: DelDuco, Emily
Sent: Friday, May 14, 2021 9:36 AM
To: Cook, Clinton <[e-mail]>
Subject: PWS approval for Draft NPDES Permit
Hi Clinton,
NC0074772/ Diamond Head WWTP is a Grade II Biological wastewater treatment facility in Iredell
County which discharges into Reeds Creek Arm [Stream Segment 11-75], currently classified WS-
IV,B;CA waters.

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Please take a moment to review this draft and send me any comments when you are able. The final
permit is ready to be issued pending your approval.
Please note that we're transitioning to paperless communication. As such, NPDES will no longer
send the separate approval memo for PWS comments on this permit draft. The email response from
you (or another PWS contact) will suffice to document the draft permit review by PWS.
Thanks for your help, and let me know if you have any questions.
Emily DelDuco
Division of Water Resources
Department of Environmental Quality
919-707-9125
emily.delducoPncdenr.gov
Nothing Compares,
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Whole Effluent Toxicity Testing and Self Monitoring Summary
O
u
O
1n
Feb May Aug Nov
C
(0
00 LL
0-
O • C
❑ C
0
z
T
0
U
NC0082949/001
Denton WTP, Town of
Chr Monit: 90%
LJ-
0
LL
N
n
0)
U
zaaLL
n
N CO 01 0
O O
U
O
UI
O
Feb May Aug Nov
oo
O
>-
co
07
00
in
O G
O
CC C
0
z
T
C
0
0
U
NC0026689/001
Denton WWTP
chr lim: 90%
zdda
N CO 01 0
O O O O
04 04 CV CV
UI
O
000
0
O
CC a
2 n
C
O
0
0
NC0074772/001
Diamond Head Subdivision WWTP
Chr Cer PF Lim: 90%
Begin: 8/1/2017
u-
0
U
0 a a a
a 2 a
Qa a a
CO 01 0
0
O
Jan Apr Jul Oct
cs
0
Ac P/F Monit: 90% M
CO
0
N
e\i
C
Ea
00
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2
C
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CO 01 0
O O O O
0
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Feb May Aug Nov
0'
O p
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a)
00
NC0089265/001
Dobson WTP
Chr Monit: 90%
LO
0
0
00
CIJ
00
LL
0-
N
17
U
LL LL LL =
N CO 01 0
N N N N
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Feb May Aug Nov
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NC0000680/001
Domtar Paper Company, LLC
7Q10: 1160
in
chr lim: 6.8%
l0 10
n n n n
0 10
01 01
n n n n
00 01 O
O O O
Page 29 of 104
Leeend: P= Fathead minnow (Pimohales oromelas). H=No Flow (facility is active). s = Split test between Certified Labs

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
The Mooresville Tribune
Advertising Affidavit
PO Box 968
Hickory, NC 28603
NCDEQ/DWR
ATTN: WREN THEDFORD
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Number
3611028
Date
March 28, 2021
Date
Category Description
Ad Number Ad Size
03/28/2021 Legal Notices Public Notice North Carolina Environmental Management Comi 0000709834 2 x 36 L
Publisher of
The Mooresville Tribune
Iredell County
Before the undersigned, a Notary Public duly commissioned, qualified.
and authorized by law to administer oaths, personally appeared the
Publisher's Representative who by being duly sworn deposes and says:
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 Tribune on the following dates:
03/28/2021
and that the said newspaper in which such notice, paper document, or
legal advertisement was published. was at the time of each and every such
publication. a newspaper meeting all the requirements and qualifications
of Section 1-597 of the General Statutes ofNorth Carolina.
/Wu4
Billing Representative
Newspaper reference: 0000709834
Sworn to and subscribed before me. this 28th day of March. 2021.
Notary Public
State of Virginia
Sharon R Carsten
NOTARY PUBLIC
County of Hanover Commonwealth of Virginia
My commission expir?ry Registration Number 329549
Commissio, July 31 2021
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Public Notice
North Carolina Environmental Management Commission./
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to issue a NPDES Wastewater Permit NC0074772 Dia-
mond Head WWTP and NC0074900 Highway 150 WWTP
The North Carolina Environmental Management Commission proposes to
issue a NPDES wastewater discharge permit to the person(s) listed below.
Written comments regarding the proposed permit will be accepted until
30 days after the publish date of this notice. The Director of the NC Divi-
sion of Water Resources (DWR) may hold a public hearing should there be
a significant degree of public interest. Please mail comments and/or infor-
mation requests to DWR at the above address. Interested persons may vis-
it the DWR at 512 N. Salisbury Street, Raleigh, NC 27604 to review infor-
mation on file. Additional information on NPDES permits and this notice
may be found on our website: http://ded.nc.9ov/about/divisions/water-re
sources/water-resources-permits/wastewater-branch/npdes-
wastewater/public-notices, or by calling [phone]. NPDES Permit
Number NC0074772: Aqua of North Carolina, Inc. has requested renewal
of its permit for the Diamond Head WWTP in Iredell County. This permit-
ted facility discharges treated wastewater to Lake Norman (Reeds Creek
Arm) in the Catawba River Basin. Currently BOD, ammonia nitrogen, and
total residual chlorine are water quality limited. This discharge may af-
fect future allocations in this portion of the Catawba River Basin. Aqua
North Carolina, Inc. has requested renewal of permit NC0074900 for its
Highway 150 WWTP in Iredell County. This permitted facility discharges
treated domestic and commercial wastewater to the Catawba River (Lake
Norman) in the Catawba River Basin. Currently, total residual chlorine
(TRC), fecal coliform, dissolved oxygen, oil & grease and ammonia nitro-
gen are water -quality limited. This discharge may affect future alloca-
tions in this segment of the Catawba River.
Publish: March 28, 2021.

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
IWC Calculations
Diamond Head - Phase I
NC0074772
Prepared By: Emily DelDuco, NPDES Program
Enter Design Flow (MGD):
Enter s7Q10(cfs):
Enter w7Q10 (cfs):
0.0731
1.0197
1.0197
Residual Chlorine Ammonia (NH3 as N)
(summer)
7Q10 (cfs)
DESIGN FLOW (MGD)
DESIGN FLOW (cfs)
STREAM STD (ug/L)
UPS BACKGROUND LEVEL (I
IWC (%)
Allowable Conc. (ug/I)
Fecal Limit
(If DF >331; Monitor)
(If DF <331; Limit)
Dilution Factor (DF)
NPDES Servor/Current Versions/IWC
1.0197
0.0731
0.113305
17.0
0
10.00
170
200/100m1
10.00
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (cfs)
STREAM STD (mg/L)
UPS BACKGROUND LEVEL (mg/L)
IWC (%)
Allowable Conc. (mg/I)
Ammonia (NH3 as N)
(winter)
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (cfs)
STREAM STD (mg/L)
UPS BACKGROUND LEVEL (mg/L)
IWC (%)
Allowable Conc. (mg/I)
1.0197
0.0731
0.11331
1.0
0.22
10.00
8.0
1.0197
0.0731
0.11331
1.8
0.22
10.00
16.0
2/24/2021

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
IWC Calculations
Diamond Head WWTP - Phase II
NC0074772
Prepared By: Emily DelDuco, NPDES Program
Enter Design Flow (MGD):
Enter s7Q10(cfs):
Enter w7Q10 (cfs):
0.1
0.8525
0.8525
Residual Chlorine Ammonia (NH3 as N)
(summer)
7Q10 (cfs)
DESIGN FLOW (MGD)
DESIGN FLOW (cfs)
STREAM STD (ug/L)
UPS BACKGROUND LEVEL (I
IWC (%)
Allowable Conc. (ug/I)
Fecal Limit
(If DF >331; Monitor)
(If DF <331; Limit)
Dilution Factor (DF)
NPDES Servor/Current Versions/IWC
0.8525 7Q10 (CFS)
0.1 DESIGN FLOW (MGD)
0.155 DESIGN FLOW (cfs)
17.0 STREAM STD (mg/L)
0 UPS BACKGROUND LEVEL (mg/L)
15.38 IWC (%)
111 Allowable Conc. (mg/I)
Ammonia (NH3 as N)
(winter)
7Q10 (CFS)
200/100m1 DESIGN FLOW (MGD)
DESIGN FLOW (cfs)
STREAM STD (mg/L)
6.50 UPS BACKGROUND LEVEL (mg/L)
IWC (%)
Allowable Conc. (mg/I)
0.8525
0.1
0.155
1.0
0.22
15.38
5.3
0.8525
0.1
0.155
1.8
0.22
15.38
10.5
2/24/2021

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Dilution Modeling Report
for
Diamond Head WWTP
Prepared by
Jerry K. Snyder, P.E., DEE, DWRE
for
Aqua North Carolina, Inc.
January 2020
D/ 17 tZD Jerry K. Snyder, P.E.
Date Typed Name
Pense No. PE032686E

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
TABLE OF CONTENTS
EXECUTIVE SUMMARY 1
1.0 INTRODUCTION 1
1.1 BACKGROUND 1
1.2 DESCRIPTION OF EXISTING OUTFALL 2
1.3 PURPOSE OF DILUTION MODELING STUDY 2
2.0 MODELING APPROACH 5
2.1 MODELING OBJECTIVES 5
2.2 MODELED CONDITIONS 5
2.3 INPUT DATA 6
3.0 MODEL RESULTS 12
4.0 SUMMARY AND RECOMMENDATIONS 14
5.0 REFERENCES 16
6.0 ATTACHMENTS 17
LIST OF TABLES
1 Discharge Limits for Diamond Head WWTP NPDES Permit # NC0074772 1
2 Outfall Pipe Configuration 2
3 CORMIX Model Scenarios 6
4 Measured Data for Lake Norman and Diamond Head 7
5 Water Density Calculations 7
6 Zone of Initial Dilution (ZID) Calculation 9
7 Diamond Head CORMIX Input Data 10
8 Water Quality Criteria 9
9 Input Concentrations and Water Quality Criteria 11
10 Dilution and Distance Required to Meet Water Quality Criteria 15
11 Dilution Achieved at the Zone of Initial Dilution (ZID) Distance 15
LIST OF FIGURES
1 Facility Location Map 3
2 Outfall Pipe Construction Drawing 4
3 Plan View of Plume from Diamond Head Outfall 8
4 Dilution vs. Distance from the Outfall at Diamond Head 12
5 In -Stream Waste Concentration along Plume Centerline — Diamond Head 13

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
LIST OF ATTACHMENTS:
1 CORMIX Input and Output Files

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Modeling Report for Diamond Head WWTP —NPDES #NC0074772 January 2020
EXECUTIVE SUMMARY
The mixing behavior of the Diamond Head WWTP discharge into Lake Norman was simulated using the
CORMIX model. Three discharge constituents were modeled, chloride, copper, and zinc. A generic
simulation was also performed that could be applied to any constituent in the discharge. The simulations
indicated that significant mixing and dilution occurred within a short distance of the outfall. A zone of
initial dilution (ZID) was calculated as 4.50 meters based on the outfall configuration. The ZID is an initial
mixing area within a short distance from the outfall. A dilution factor of 10.0 was achieved at the ZID. This
dilution allowed the most stringent water quality criteria for chloride, copper, and zinc to be met within the
ZID when the discharge concentrations were at or below the future daily maximum concentrations for
chloride, copper, and zinc. However, the dilution was not sufficient to allow the maximum measured
concentration of copper to be met within the ZID.
1.0 INTRODUCTION
1.1 BACKGROUND
Aqua North Carolina, Inc. operates the Diamond Head Subdivision Wastewater Treatment Plant (WWTP)
under NPDES Permit NC0074772. The WWTP treats 100% domestic wastewater from the Diamond Head
Subdivision. The WWTP is located at 799 Williamson Road, Mooresville, Iredell County, North Carolina.
The WWTP is permitted to discharge up to 0.0731 million gallons per day (MGD) with projected expansion
to 0.100 MGD. The average discharge flow rate in 2017 was 0.0225 MGD. The future discharge limits for
chloride, copper, and zinc are listed in Table 1 below.
Table 1
Discharge Limits for Diamond Head WWTP NPDES Permit # NC0074772
Parameter
Monthly Average
Units
Daily Maximum
Units
Flow'
0.0731
MGD3
Total Chloride2
230
mg/L4
250
mg/L4
Total Copper2
7.88
ug/L5
10.47
ug/L5
Total Zinc2
125.7
ug/L5
125.7
ug/L5
Notes:
1. The anticipated future flow rate is 0.100 MGD.
2. The discharge limits will become effective April 1, 2020.
3. MGD is million gallons per day
4. mg/L is milligrams per liter
5. ug/L is micrograms per liter
i

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Modeling Report for Diamond Head WWTP —NPDES #NC0074772 January 2020
1.2 DESCRIPTION OF EXISTING OUTFALL
The WWTP discharges treated domestic wastewater to Lake Norman (Reeds Creek Arm) in the Catawba
River Basin through a permitted outfall pipe. A location map showing the locations of the facility and the
outfall pipe is included as Figure 1 below. Lake Norman is classified as WS-III & B (Water Supply III and
Full Contact Recreation). The outfall is a 4-inch diameter pipe that ends in the center of Reeds Creek, 100
feet from the shore. A construction drawing showing the profile of the outfall pipe is included as Figure 2
below. On occasion the concentration of total copper has exceeded the anticipated permit limit of 7.88
ug/L. The basic configuration of the outfall is described in Table 2 below.
Table 2 Outfall Pine Configuration
Diamond Head
Location
Lake Norman
Orientation of pipe
Horizontal 2' above bottom
Distance from Shore, feet
100
Diameter, inches
4
Diffuser
Deflector Plate
Material
Ductile Iron
Easement Width, feet
20-25
1.3 PURPOSE OF DILUTION MODELING STUDY
In 2017 the Facility exceeded its anticipated monthly average limit for the concentration of total copper in
September and December. The measurements of total copper in September and December were 10 ug/L and
9 ug/L respectively. The future Monthly Average limit for copper is 7.88 ug/L. It should be noted that both
of these measurements were lower that the Daily Maximum limit of 10.47 ug/L. Since only one measurement
was taken during each month, that value represented both the Monthly Average and the Daily Maximum
reported value.
The latest NPDES permit renewal effective June 1, 2018 requires a Study Plan and recommendations for
dilution modeling. "The plan shall recommend steps needed to establish in instream waste concentration
(IWC) at the point of discharge."
One objective of the study was to establish effluent dilution credits for total chloride, total copper, and total
zinc. This study determined the IWC at various distances from the end of the discharge pipe. The distance
where the permitted concentrations are met was determined as an objective of this dilution study. The
distances from the end of the discharge pipe where the permitted concentrations are met are the basis for a
recommended dilution credit. The dilution credit is an allowance of end -of -pipe concentrations greater than
the permit value as long as the permitted concentrations are achieved within a short distance from the end of
the pipe. That short distance is called the zone of initial dilution (ZID). Dilution credits may be developed
and applied to other constituents as well.
2

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
Figure 1 Facility Location Map
4' Q r rI' approximate location
AQUA North Carohna
Diamond Head Subdivision WWTP
Rretivin¢:i1 rraiii Loke NCririin [Ram Cr ck Mind! I
kirpaIn tirrlinoid= rI-C?) Sirocco C1ns: W. V: B: (A
Nola Grid'Quad: El5SEJ1k villa Fj ; CANwi River
Suh-Hailn_ 11548-3: nur 03050L01
Facility
Location
noL i�st.it
L NPDES Permit NC0071772
Jredell C'011i]l4
3

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
—r-
-IELi-.H =.r-�
Figure 2 Outfall Pipe Construction Drawing
r
•
1-
•
-1
1
s
4

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
2.0 MODELING APPROACH
2.1 MODELING OBJECTIVES
The objective of the modeling study is to simulate the behavior of the discharge plume from the outfall.
The simulation will allow evaluation of the IWC of total chloride, copper, and zinc in the discharged water
as the plume mixes with ambient water. Although total chloride, copper, and zinc are the main constituents
of interest in this study, the simulation results will be general and could be applied to any constituent in the
discharged water.
2.2 MODELED CONDITIONS
The simulations were accomplished using a well -established and accepted hydrodynamic model, Cornell
Mixing Zone Expert System (CORMIX). The CORMIX model was used to simulate the plume behavior of
the existing discharge under existing conditions. The model was used to develop a steady-state
concentration profile along the discharge plume centerline. The locations and distances from the end of the
outfall pipe where the permitted total chloride, copper, and zinc concentrations are met were determined. A
total of four simulations were performed representing total chloride, total copper, total zinc and a generic
(generalized) parameter. Since the pumps cycle on an off with the treated effluent level in the pump tank, a
single instantaneous pumping rate was used in the model to represent the discharge flow rate because the
instantaneous pumping rate while the pumps are on will remain the same. This reflects the actual mixing
behavior at the outfall pipe while the discharge is active. The instantaneous pumping rate is independent of
the flow rate passing through the treatment plant. If the average daily flow to the plant changes, the pumps
cycle more or less frequently but the discharge rate while the pump is operating will remain the same.
Three specific model runs were made for total chloride, copper, and zinc. These parameter -specific
simulations account for the background concentration of total chloride, copper, and zinc in the ambient
environment. The generalized plume simulation assumed 100% as the discharge concentration and 0% in
the background concentration. The results of the generalized simulation can be used to calculate the IWC
of any constituent in the discharged water by multiplying the model -predicted percentage concentration in
the plume by the concentration of that constituent at the end of the pipe. The four model scenarios are
summarized in Table 3 below. The permitted daily maximum concentration was used as input to the
CORMIX model.
5

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
Table 3 CORMIX Model Scenarios
Discharge
Flow 1
Modeled
Constituent
Discharge
Concentration2
Units
(gpm)
40
Total Chloride
250
mg/L
40
Total Copper
10.47
ug/L
40
Total Zinc
125.7
ug/L
40
Generalized
Parameter
100
1. The instantaneous pumping rate was used for all
scenarios.
2. Before adjustment for background concentrations.
2.3 INPUT DATA
The CORMIX model is a hydrodynamic computer code that simulates the behavior of hydraulic plume or
"jets" in various ambient environments. It has been applied extensively to model or simulate the behavior
of water discharges into lakes and stream environments. The model utilizes data on the discharge
configuration and flow rate, ambient environment, and relative densities between the ambient water and the
discharged water. The CORMIX model has separate modules to simulate submerged single -port discharges
(CORMIX1), submerged multi -port diffusers (CORMIX2), and buoyant surface discharges (CORMIX3).
The CORMIX1 module was used for this study. The data requirements for the CORMIX model and the
sources of those data are listed in Table 4 below.
Adjustments for Background Concentrations
CORMIX models the concentrations of constituents in water, no matter which units of measure are used, as the
concentrations above background. Therefore, if there is a non -zero background (ambient) concentration of any
modeled constituent, that background concentration is subtracted from the discharge concentration and the water
quality criterion as well. For interpretation of the calculated model output concentrations, the background
concentrations are added to the predicted plume concentrations. When a background concentration is present, the
dilution factors (S) calculated by the model are the ratio of the adjusted discharge concentration to the adjusted water
quality criterion.
In addition to the four model scenarios listed in Table 3 above, one additional scenario was run. This represented the
maximum copper concentration measured on October 17, 2018. Additional water samples were collected on October
17, 2018 and analyzed for use in this dilution modeling study. These are listed in Table 4 below.
6

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
Table 4 Measured Data for Lake Norman and Diamond Head October 17, 2018
Measurement Location
Parameter
Value
Units
Effluent
Temperature
23
°C
Effluent
Total Dissolved Solids
445
mg/L
Effluent
Chloride
96
mg/L
Effluent
Copper
27
ug/L
Effluent
Zinc
91
ug/L
Upstream
Temperature
23
°C
Upstream
Total Dissolved Solids
32
mg/L
Upstream
Chloride
6.0
mg/L
Upstream
Copper
<5
ug/L
Upstream
Zinc
12
ug/L
Downstream
Temperature
23
°C
Downstream
Total Dissolved Solids
31
mg/L
Downstream
Chloride
6.25
mg/L
Downstream
Copper
<5
ug/L
Downstream
Zinc
<10
ug/L
Water Density Calculations
The behavior of the discharge plume modeled in CORMIX is affected by the energy (velocity) of the discharged jet
and the relative density of the discharged water and the receiving water. The densities used for the Diamond Head
discharge and Lake Norman were calculated from the measured total dissolved solids (TDS) concentration and
temperatures measured on October 17, 2018. The calculated water densities are summarized in Table 5 below.
Table 5 Diamond Head Water Densities
Total Dissolved
Solids, TDS
Temperature
i
Density
mg/L
°C
kg/m3
Discharge
445
23
997.879
Lake Norman
32
23
997.566
1. Density was calculated from Sea Water Equation of State
online calculator, http://fermi.jhuapl.edu/denscalc.html.
Discharge Rate
The discharge rate was calculated from the measured time required for the discharge pump to draw down a holding
tank between the upper and lower set points on the tank. The 92-inch diameter tank was drawn down 1.25 feet in 5
minutes. This resulted from a pumping rate of 87 gallons per minute (gpm); 0.125 million gallons per day (mgd).
Initial model runs indicated that this flow rate created a coherent jet with a high velocity at the end of the pipe which
resists initial mixing with the ambient water resulting in a dilution factor, S, of 6.5 at a ZID distance of 4.50 meters
from the end of pipe. A dilution factor of 6.5 was not sufficient to achieve the water quality criterion for zinc within
the ZID. Exploratory model runs indicated that lowering the discharge rate, and exit velocity of the jet, allowed more
rapid mixing with the ambient water. By reducing the discharge rate by about half allowed more rapid mixing. Aqua

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Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
NC personnel were able to reliably throttle the discharge rate from Diamond Head to 40 gpm. Therefore, the pump
discharge rate used in the model was 40 gpm.
Downstream Velocity
The downstream velocity was calculated from the relative drainage areas at Cowan's Ford Dam (1,790 square miles,
s.mi.) and the Catawba River at the discharge location 10.1 s.mi.) and the average annual flow at the dam (1,726
mgd) based on five years of daily discharge data. The calculated average annual flow along the Catawba River at
Pine Run is 9.7 mgd (15.0 cfs). The cross -sectional area of the Catawba River at the discharge location was measured
from Google Earth and a U.S.G.S. Quadrangle map (Mooresville, NC, 7.5-minute quadrangle, 2016) as 5,044 square
feet, s.f. The calculated downstream velocity is 0.003 feet per second, fps.
Diffuser Configuration
The outfall for Diamond Head is a 4-inch diameter ductile iron (DI) pipe with a deflector plate diffuser at the end of
the pipe. For input to CORMIX, the outfall was described as a 0.33-foot diameter circular outfall with a vertical
angle of 45°. The outfall pipe is located 2 feet above the channel bottom.
Outfall Pipe Orientation
The diffuser is perpendicular to the direction of the Catawba River. The origin for the coordinate system for model
output is at pipe opening. The coordinates are oriented as follows. The downstream direction of flow is the positive
X direction. The opposite river bank is the positive Y direction, and straight up from the bottom is the positive Z
direction. The discharge is pointed in the positive Y direction and the plume is weakly deflected in the X direction, to
the left, by the small downstream velocity. Figure 3 shows the dimensions of the plume originating from the diffuser
pipe. The origin of the graph is at the end of the outfall pipe.
Figure 3 Plan View of Plume Trajectory for Diamond Head Outfall
Plan View of Plume Trajectory
Diamond Head Outfall
Ab%
2
1.5 1 0.5 0
-0.5 -1
Distance Downstream from 0utfall, Meters
Plan View of Trajectory Right Edge Plume Left Edge Plume
10
m
8
0
6
2
4
aw
ire
2 N N
0
V
0 4
d
V
m
0
8

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Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
Zone of Initial Dilution (ZID)
The ZID is a limited area around a discharge pipe or outfall where the water quality criteria for toxic constituents
may be exceeded as long as the criteria are met at the edge of this limited zone and the limited nature of the ZID
allows for passage of aquatic life around the zone. The dimensions of the ZID can be calculated as the minimum of 5
x ambient depth or 50 x discharge length scale (DLS). The DLS is defined as the square root of the area of the
discharge. The ZID for the diffuser is 14.77 feet (4.50 meters). Table 6 below shows the calculation of the ZID
distance for Diamond Head.
Table 6 Zone of Initial Dilution Calculations
Pipe
Diameter
Area
Discharge
Length
Scale, DLS
50 x DLS
Avg.
Depth at
Discharge
5 x Depth
Zone of
Initial
Dilution,
ZID
Zone of
Initial
Dilution,
ZID
(in.)
(s.f.)
(ft.)
(ft.)
(ft.)
(ft.)
(ft.)
(m)
Diamond Head
4
0.09
0.30
14.77
26.00
130.00
14.77
4.50
Table 7 below lists the input values used in the generalized model scenario.
Water Quality Criteria and Background Concentrations
Lake Norman is classified as WS III/B water uses. Class WS III is a water supply classification and B is for primary
contact recreation. In addition, there are chronic and acute limits that apply to freshwater aquatic life. Table 8 below
lists the water quality criteria for chloride copper and zinc for Lake Norman. The minimum of all the water quality
criterion for chloride, copper, and zinc was selected as the limiting criterion.
Table 8 Water Quality Criteria
FW Aquatic
Parameter
Units
B
WS III
Chronic
Acute
Background
Chloride
mg/L
N/A
250
230
230
6
Copper'
ug/L
N/A
N/A
1.97
2.53
0
Zinc2
ug/L
N/A
N/A
26.32
26.11
12
1. A hardness value of 17 mg/L as CaCO3 was used to calculate the criterion
for copper.
2. A hardness value of 17 mg/L as CaCO3 was used to calculate the criterion
for zinc.
3. The lowest Water Quality Criterion was used as the critical criterion.
The input concentrations for chloride, copper, and zinc adjusted for background concentrations are listed in Table 9
below. Table 9 shows the maximum daily permit limits, the minimum water quality criteria, the ambient
concentrations, and the adjusted discharge and criteria concentrations.
9

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Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
Table 7 Diamond Head CORMIX Input Data
Module: CORMIX1 Submerged Single Port Discharges
TAB
I INPUT DATA
I UNITS OF MEASURE
Project Tab
Name:
Diamond Head - Lake Norman
Scenario:
Generalized
Ambient Tab
Average Depth:
28
feet
Discharge Depth:
26
feet
Ambient Velocity:
a003
feet per second, fps
Bounded/Unbounded
Bounded
VViidth:
236
feet
Manning's n:
a025
Wind Speed:
0
meters/second, m/s
Ambient Density Data
Fresh/Uniform
Water Density:
997.566
kilograms per meter squared, kgjm2
Effluent Tab
Flow Rate:
0.0576
million gallons per day, MGD
Concentration:
100
percent, %
Discharge Density
997.879
kilograms per meter squared, kg/m2
Pollutant Type:
Conservative
Discharge Tab
Nearest Bank:
Left
Distance to nearest bank:
100
feet
Port Diameter:
a33
feet
Vertical Angle Theta (0 )
45
degrees, °
Horizontal Angle Sigma (al:
90
degrees, °
Port Height:
2
feet
Mixing Zone Tab
Toxic/NonToxic
NonToxic
WQStandard
No WQStandard
(for generalized parameter scenario)
Specified Mixing Zone Tab
Mixing Zone Specified
Distance:
4.50
meters
Region of Interest
1000
meters
Grid Intervals for Display
100
No. of Display Steps
10

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Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
Table 9 Input Concentrations and Water Quality Criteria Adjusted for Background Concentration
Parameter
Units
Discharge
Concentration
Water
Quality
Criterion
Ambient
Concentration
Discharge
Concentration
above
Background
Water
Quality
Criterion
above
background
Scenario Name
Chloride
mg/L
250.0
230
6.0
244
224
Permitted Chloride
Copper
ug/L
10.47
1.97
0
10.47
1.97
Permitted Copper
Zinc
ug/L
125.7
26.11
12
113.7
14.11
Permitted Zinc
Max. Copper
ug/L
27.0
1.97
0
27
1.97
Highest Measured Copper
11

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3.0 MODEL RESULTS
The CORMIX model calculates the mixing of the discharged water with the ambient water and displays a dilution
factor, S, and the instream waste concentration (IWC) at the plume centerline. CORMIX defines the dilution factor,
S, as the discharge concentration divided by the in -stream waste concentration. For example, if the dilution factor is
25, the concentration at the plume centerline is 4 % of the discharge concentration. A plot of the calculated centerline
dilution factors versus distance from the outfall pipe is shown in Figure 4. Note that all output from CORMIX is in
metric units even though it does allow input of English units for most parameter values. Figure 5 is a corresponding
plot of the Instream Waste Concentration (IWC) versus distance from the outfall pipe. Figure 5 is based on the
discharge concentration of 100% and can be applied to any constituent in the discharged water.
Figure 4 Dilution vs. Distance from the Outfall at Diamond Head
14
12
,n10
m 8
u_
0 6
4
Dilution vs. Y Distance from Outfall
Diamond Head
2
•
0
0
1 2 3 4 5 6
Distance Across River from Outfall, Meters
12

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Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
Figure 5 In -Stream Waste Concentration along Plume Centerline — Diamond Head
Plume Centerline Concentration, %
100 •
90
80
70
60
50
40
30
20
10
0
0
Concentration vs. Y Distance from Outfall
Diamond Head
1 2 3 4
Distance Across River from Outfall, Meters
5
6
Parameter -Specific Model Results
Three parameter -specific scenarios were run showing calculated in -stream concentrations of chloride, copper, and
zinc. One additional scenario was run using the maximum copper concentration measured in the discharge. Since
CORMIX evaluates excess concentration (i.e., concentrations above background levels, if present) the discharge
concentrations and water quality criteria were both reduced by the measured background levels of chloride and zinc
for input to the model. For interpretation of the model output, the background concentrations are added to the results.
Note that there was no copper measured in the background water sample.
The results of the parameter -specific scenarios are summarized on Table 10. The CORMIX model calculated that the
rapid mixing within the ZID results in mixed concentrations of chloride, copper, and zinc concentrations that are all
less than the most sensitive water quality criteria.
The worst -case scenario is for a discharge concentration of copper at 27 ug/L which is the maximum copper
concentration measured at the outfall and exceeds the proposed daily permit limit of 10.47 ug/L. For this case, the
water quality criterion for copper of 1.97 ug/L would be met 6.46 meters from the outfall pipe at a dilution ratio of
13.7.
13

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Modeling Report for Diamond Head WWTP — NPDES #NC0074772 January 2020
4.0 SUMMARY AND RECOMMENDATIONS
The calculated centerline dilutions and concentrations at the ZID distance of 4.50 meters are summarized in Table 11
for five scenarios. The results of the dilution modeling, which included the angled plate diffuser and a discharge flow
rate of 40 gpm, show that the future discharge limits on chloride and copper are both met within the ZID distance
from the outfall.
The calculation of the ZID distance of 4.50 meters was presented in Table 6 based on the minimum criterion of
50*DLS. This method for calculating a ZID is recognized by the USEPA, Environmental Regulators, and is
referenced in the CORMIX user's manual. Table 11 demonstrates that a dilution factor of 10.0 is achieved at a ZID
distance of 4.50 meters from the outfall. At this dilution, the water quality criteria for chloride, copper, and zinc are
met when the discharged concentrations are at or below the future daily maximum permitted concentration. The last
column in Table 11 is a possible dilution credit which is a percent increase in the permit limit in the discharge
concentration that will still allow the most stringent water quality criteria to be achieved within the ZID. It is
included to demonstrate the factor of safety built into the future discharge limits.
The maximum copper concentration meets the water quality criterion o 1.97 ug/L at 6.46 meters from the end of the
outfall pipe with a dilution of 13.7. The existing outfall configuration does not meet a dilution factor of 13.7 within
the ZID of 4.50 m.
14

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Modeling Report for Diamond Head WWTP - NPDES #NC0074772 January 2020
Table 10 Dilution Required to Meet Water Quality Criteria and Distance from Outfall Pipe
Discharge
Concentration
Minimum
Water
Quality
Criterion
Distance
in the X
Direction
Distance
in the Y
Direction
Distance
in the Z
Direction
Dilution
Factor
Predicted
Centerline
Concentration
Including
Background
Parameter
Units
Meters
Meters
Meters
S
Chloride
mg/L
250
230
0.00
0.43
1.04
1.0
236
Copper
ug/L
10.47
1.97
0.05
2.74
2.42
5.3
1.97
Zinc
ug/L
125.7
26.11
0.10
4.01
1.82
7.9
38.1
Max. Copper
ug/L
27
1.97
0.44
6.46
0.00
13.7
1.97
Table 11 Dilution Achieved at the Zone of Initial Dilution Distance of 4.50 meters - Diamond Head
Discharge
Concentration
Minimum
Water
Quality
Criterion
Distance
in the X
Direction
Distance
in the Y
Direction
Distance
in the Z
Direction
Dilution
Factor
Predicted
Centerline
Concentration
Including
Background
Possible
Dilution
Credit above
Permit Limit
Parameter
Units
Meters
Meters
Meters
S
Chloride
mg/L
250
230
0.13
4.50
1.18
10.0
30.4
86.8%
Copper
ug/L
10.47
1.97
0.13
4.50
1.18
10.0
1.05
46.7%
Zinc
ug/L
125.7
26.11
0.13
4.50
1.18
10.0
23.40
10.4%
Max. Copper
ug/L
27
1.97
0.13
4.50
1.18
10.0
2.71
-37.6%
Gereric
%
100
N/A
0.13
4.50
1.18
10.0
10.0
15

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5.0 REFERENCES
1. Mixing Zones in North Carolina July 23, 1999.
2. Technical Support Document for Water -quality Based Toxics Control, pp. 71-72 (EPA/505/2-90-
001 March 1991).
3. User's Manual for CORMIX: A Hydrodynamic Mixing Zone Model and Decision Support
System for Pollutant Discharges into Surface Waters. G.H. Jirka, R.L. Doneker, and S. W. Hinton
September 1996.
16

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6.0 ATTACHMENTS
CORMIX Model Input and Output Files in Electronic Form Provided by E-mail
17

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
ROY COOPER
Governor
MICHAEL S. REGAIN - .�
.'i.
Secretary 4 ssr
LINDA CULPEPPER NORTH CAROLINA
Director Environmental Quality
September 27, 2019
AQUA North Carolina, Inc.
Attn: Amanda Berger
202 Mackenan Crt
Cary, NC 27511
Subject: Permit Renewal
Application No. NC0074772
Diamond Head WWTP
Iredell County
Dear Applicant:
The Water Quality Permitting Section acknowledges the September 26, 2019 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. 150E-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.
ec: WQPS Laserfiche File w/application
Sincerely,
JciliAlQ126
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
North Caro&na Department of Environrnent_1 Quality 1 Divs'an of Water Resources
Mooresvaye Regvnad Office 1810 East Center Avenue, Suite 301 I Mooraavly, North Carona 28115
704-8883-1899

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Slot
September 24, 2019
NCDENR / Division of Water Quality/ NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-0167
Re: Application for Permit Renewal
Aqua North Carolina, Inc.
Diamond Head WWTP
NPDES No. NC0074772
Iredell County
Good Afternoon:
RECE/V
ED
SEP262019
NCDFQ/DW PD
ES
Enclosed are three (3) copies of the completed application Form D-WWTP. This
submittal includes the necessary attachments for your office to renew the subject
permit.
Corrections to the treatment system components have been listed to accurately reflect
the plant consists of having one (1) aeration basin (rather than duel) and one (1) clarifier
(rather than duel). The Corr -nix study to evaluate copper and chloride limits at this facility
is in the final stages.
Should you need any additional information or assistance, please feel free to contact
me [phone] or by e-mail at [e-mail].
Sincerely,
d a YiPilTl,
Amanda Berger
Director, Environmental Compliance
Aqua North Carolina
-Enc: NPDES Application, Form D
Diamond Head NPDES Permit'
202 MacKenan Court, Cary, NC, 27511 • 919.467 8712 • AquaAmerica.com

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES APPLICATION - FORM D -
For privately -owned treatment systems treating 100% domestic wastewaters <1.0 MOD
Mail the complete application to:
NC DEQ / DWR / NPDES
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit
NC000074772
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
e-mail Address
AQUA NORTH CAROLINA, INC.
DIAMOND HEAD SUBDIVISION WWTP
202 MACKENAN COURT
CARY
NORTH CAROLINA 27511
[phone]
[phone]
[e-mail]
2. Location of facility producing discharge:
Check here if same address as above Ti
Street Address or State Road 799 WILLIAMSON ROAD
City
State / Zip Code
County
MOORESVILLE
NORTH CAROLINA
IREDELL
3. Operator Information:
Name of the firm, public organization or other entity that operates the facility. (Note that this is not
referring to the Operator in Responsible Charge or ORC)
Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
e-mail Address
AQUA NORTH CAROLINA, INC.
202 MACKENAN COURT
CARY
NORTH CAROLINA 27511
[phone]
[phone]
[e-mail]
1 of 3
Form-D 6/2017

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES AP 'MMCAT IN - F ±t RM )i
For privately -owned treatment systems treating 100% domestic wastewaters <1.0 MGD
escription of wastewater:
Facility Generating Wastewater(check all that apply):
Industrial ❑ Number of Employees
Commercial Ai Number of Employees
Residential Number of Homes
School ❑ Number of Students/Staff
Other ❑ Explain:
Describe the source(s) of wastewater (example: subdivision, mobile home park, shopping centers,
restaurants, etc.):
14 Commercial Connections and 142 !'' esidential Connections
Number of persons served:
5. Type of collection system
4 Separate (sanitary sewer only) ❑ Combined (storm sewer and sanitary sewer)
6. Outfall Information:
Number of separate discharge points 1
Outfall Identification number(s) 001
Is the outfall equipped with a diffuser? 4 Yes
❑ No
7. Name of receiving stream(s) (NEW applicants: Provide a map showing the exact location of each
outfall):
Lake Norman (Catawba River Basin)
S. Frequency of Discharge: 4 Continuous ❑ Intermittent
If intermittent:
Days per week discharge occurs: Duration:
9. Describe the treatment system
List all installed components, including capacities, provide design removal for BOD, TSS, nitrogen and
phosphorus. If the space provided is not sufficient, attach the description of the treatment system in a
separate sheet of paper.
The 0.0731 package plant consists of the following:
• Influent includes trucked -in filter backwash from potable water treatment (ion
exchange filters) from subdivision wells
• Influent Bar Screen
® V-Notch Weir
o Flow -Equalization Tank
o One (1) Aeration Basin
o One (1) Clarifier
o Aerated Sludge Holding Tank
o Tertiary Filters
o Tablet Chlorination and Dechlorination
• Post Aeration
9 Flow Recorder
G Effluent Pump Station
® Stand -By Power Generator
2 of 3 Form-D 6/2017

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
- NPDES APPLICATION - FORM D
For privately -owned treatment systems treating 100% domestic wastewaters <1.0 MGD
10. Flow Information:
Treatment Plant Design flow 0.0731 MGD
Annual Average daily flow 0.036 MGD (for the previous 3 years)
Maximum daily flow 0.060 MGD (for the previous 3 years)
11. Is this facility located on Indian country?
❑ Yes V No
12. Effluent Data
NEW APPLICANTS: Provide data for the parameters listed. Fecal Coliform, Temperature and pH shall be grab
samples, for all other parameters 24-hour composite sampling shall be used. If more than one analysis is reported,
report daily maximum and monthly average. If only one analysis is reported, report as daily maximum.
RENEWAL APPLICANTS: Provide the highest single reading (Daily Maximum) and Monthly Average over
the past 36 months for parameters currently in your permit. Mark other parameters "N/A".
Parameter
Daily
Maximum
Monthly
Average
Units of
Measurement
Biochemical Oxygen Demand (BOD5)
11.0
1.80
MG/L
Fecal Coliform
320.0
6.1
#/100 ML
Total Suspended Solids
15.0
4.1
MG/L
Temperature (Summer)
28.0
23.7
° Celsius
Temperature (Winter)
18.0
12.7
° Celsius
pH
8.4
N/A
UNITS
13. List all permits, construction approvals and/or applications:
Type
Hazardous Waste (RCRA)
UIC (SDWA)
NPDES
PSD-(CAA)
Non -attainment program (CAA)
Permit Number
NC0074772
14. APPLICANT CERTIFICATION
Type
NESHAPS (CAA)
Ocean Dumping (MPRSA)
Dredge or fill (Section 404 or CWA)
Other
Permit Number
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.
Amanda Berger
Printed name of Person Signing
Director, Environmental Compliance
Title
q/2Li/20 I c/
Signature of Applicant Date
North Carolina General Statute 143-215.6 (b)(2) states: 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 )
3 of 3
Form-D 6/2017

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
SLUDGE MANAGEMENT AN
For
Aqua North Carolina, Inc.
No sludge will be treated on any wastewater treatment plant site operated
by Aqua N.C., Western Division
Where practical, sludge reii oved from an Aqua N.C., Western
ivision facility will be transported via a c;. ntract hauler to another
Aqua N.C., Western Division facility for the purpose of "seeding" a
ew or wider,loaded plant.
1�7
Unusable (or "dead") sludge will be rem=r>ved by a contract hauler and
properly disposed of in accordance with NCGS 143m215.1. Contract
haulers used by Aqua N.C., Western Division will be required to
reprt the quantity of sludge transported and identify the location of
the proposed disposal site if the sludge is not taken to an existing
plant operated by Aqua N.C., Western Livision. Aqua N.C., Western
Division has not entered into any agreement to accept sludge into its
facilities from plants not owned by them.
Aqua N.C., Western Division will keep records on the quantity of sludge
removed from each facility, the name of the contract hauler, and the
destination of the sludge (whether used in another plant or disposed of).
The information will be kept on file and will be made available to any
regulatory agency having jurisdiction over sludge treatment or disposal.
Aqua N.C., Western Division includes all of the facilities under the
jurisdiction of the Mooresville Regional Office.
202 MacKenan Court, Cary, NC, 27511 . 919.467.8712 AquaAmerica.com

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Diamond Head WWTP
Aug-18
Sep-18
Oct-18
Nov-18
Dec-18
Jan-19
Feb-19
Mar-19
Apr-19
May-19
Jun-19
Jul-19
w-tjjSY�.t •ri' y 2
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64r
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Iredell County
NC0074772
(Avg.) 7/2019
ri•.' -"Y _
t o„r s -.' ',,7 ;,; �'-; a' 1 ', 93del:
<1
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0 8
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1.6
4 0
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0.6
2 5
2.6
<1
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KiirlMEOVAI
„23c7F
- 1.8"_ _
'
MG/L
"y' , ;ti . • ;C F, ecahCoh oL=m;
f
11 9
<1
<1
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3.8
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2.9
42
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101
12.8
. "
��Cri�6:1=,�fijn�
��,6:1e��,tt/100ML
`
A,,.,s-k r i�:�;�C'+ Y<:4TS5,
3.2
6.1
4.4
4.1
5.3
7.3
3.4
2.6
4.0
5.4
2.7
1.0
011"`4)'130
czt�' a:1"'-?'
MG/L
=, u,'>>ra;Te`"mpr(Sunimer)
27.2
26.0
21.6
,
ar
tustrm
-- 17:0
22 8 -
' 25.0
26.6
.a 23:7 <s, .
° Celsius
Xi; 4 ,Temp (lNinter)'
(Max.)
15.5-.
',11' 3-- -
, 11:8
, .12 9, ,
; 12.5
'�''
-/'>
P)ry • ,
x Mlax: zd
''. ;;12c7 -,` = ' 1-2 7,-'„fir:
S Max "i F 'MAX •
° Celsius
n4ea`s'uremente'
%' ' ' 'i=r''-;: '.=_8'OD,
=z =•
<1
<1
4 0
3 7
3.7
7.5
5.9
2.2
4.0
110
<1
<1
11'0� Y„�F
:110' ^'
MG/L
: _ - FecalColifoiml
58 0
<1
<1
<1
210.0
17.0
5 0
72 0
300.0
<1
220.0
320 0
`s;�a320fDsy;;,
0:
#/100ML
- `,,V "-''r<''= ` -', 1TS5
4 7
14 0
5 4
6 2
11.0
14 0
6.2
6 7
6 2
15 0
5 6
4.8
r 15f0
--v1.5A;i ',,
MG/L
; '-=: ;- ; _, -.TempSummer)
28 0
27.0
25.0
`
WAWA
s_,,',_.'
19.0 --
- 26.0 -
26.0
27.0
28 0.: - 28 0T -°
° Celsius
.;•r, ,Temp (Willi -ill
,„. -�t^
,`�''.'�
s
�
ies,;;�.r, t.Jx
-S10.1-
18.0 -
13.0
15.0
13.0'
14:0
��
MVO �'zw
� �z%''i��u
s`a
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ARAM »t
��i?���S:i .
_
t18 0 ''-;%` :='18.0�' °"�
" = -=
r8'4 _�
° Celsius
UNITS
-r; N5, ft
- 'P
72
75
7.6
75
7.7
7.5
7.6
7.4
78
7 5
7.6
8484,
; l:r'HnnuaMun-Flow:,
Explanation:
Temp (Summer)
Temp (Winter)
0 039
0 058
.034 0 036 0.040 0.037 0.040 0.034 0 035 0 036 0.036 0 038 :5 1,0 036: 0 036r,: Annualflie- Flow:
0.050 0 054 0.060 0.050 0.056 0.043 0 049 0 043 0.050 0 044 tart".Oid60f`ity
Yellow is to represent the months a Temp analysis was available The months analyzed may change for the system your entering
If so, you can change the color to represent the months for your analysis.
You may change your original to suit your needs
Maz Flow
Apr 1 to Oct 31
Nov 1 to Mar 31

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Water Resources
ENVIRONMENTAL QUALITY
Shannon V. Becker, President
AQUA North Carolina, Inc.
202 MacKenan Court
Cary, North Carolina 27511
Dear Mr. Becker:
May 10, 2018
ROY COOPER
Governor
MICHAEL S. REGAN
Sect elms
LINDA CULPEPPER
Inter inr Di, eclar
4114y,
8
4/8
Subject: Correction to Permit Modification
Issued April 12, 2018
NPDES Permit NC0074772
Diamond Head Subdivision WWTP, Grade WW-2
799 Williarnson Road, Mooresville
Iredell County
NPDES Staff met with representatives of AQUA on May 4, 2018. At that meeting, AQUA
submitted new information not in DWR records; data included a scale drawing and section of the
subject WWTP's discharge line.
The drawing shows the discharge line extending out into Lake Norman, and descending vertically
approximately 35 feet to terminate two feet off the lake bottom (lake elevations establish Nov1986).
This drawing describes a "deflector plate" fitted at end -of -pipe, Outfall 001. DWR has no record of the
deflector plate or modeling conducted to establish a dilution credit. [owner at installation, Mid -South
Water Systems Inc. per ATC dated 22Aug1994 (?)].
Based on this new information, the Division has decided to extend the limit -compliance period to give
the Permittee sufficient time to evaluate a dilution factor and/or comply with the permit limits. The
compliance deadline is hereby extended to include Total Chloride, Total Fluoride, Total Copper, and
Total Zinc; compliance due by the end of the permit cycle (April 1, 2020). Compliance is also extended
to WET -testing as Monitoring Only till April 1, 2020.
After further modeling and analysis by the Permittee, the Division may consider the "deflector plate"
to function as an "effluent diffuser." If dilution is proposed, AQUA shall submit appropriate modeling
(for this or alternate diffuser device) for DWR approval, prior to implementation [see Special
Condition A. (5.)].
If any parts, measurement frequencies, or sampling requirements contained in this permit are
unacceptable, you have the right to an adjudicatory hearing, upon written request submitted within
thirty (30) days after receiving this letter. Your request must take the form of a written petition
conforming to Chapter 150B of the North Carolina General Statutes, and you must file it with the
State of North Carolina I Environmental Quality I Water Resources
1611 Mail service Center 1 Raleigh, North Carolina 27699-1611
919 707 9000

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Shannon V. Becker
AQUA Diamond Head WWTP, NC0074772,
May 10, 2018
Page 2
office of Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714.
Unless such a demand is made, this permit shall be final and binding. "
This permit is not transferable except after notifying the Division of'Water Resources. The Division
may require permit modification, or revocation and re -issuance. Please note that this permit does not
affect your legal obligation to obtain other permits required by the Division of Water Resources, the
Division of Land Resources, the Coastal Area Management Act, or other federal or local
governments.
If you have questions, or if we can further assist you, please contact Joe Corporon at
[e-mail]] or call his direct line [phone].
____Linda Culpepper
Enclosure: NPDES Permit NC0074772 (modification corrections, change -pages 1 thru 9)
hc: Central Files
NPDES Program Files
MRO/SWPS, Corey Basinger, Supervisor
ec: MRO/SWPS, Corey Basinger, Supervisor
OCU, Maureen Kinney
ATB, Susan Meadows, Cindy Moore
AQUA, Amanda Owens [[e-mail]]
AQUA, Joe Pearce [[e-mail]]
DWR/Public Water Supply; [[e-mail]]

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Permit NC0074772
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
In compliance with the provisions 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,
AQUA North Carolina, Inc.
is hereby authorized to discharge wastewater from a facility located at the
Diamond Head WWTP
799 Williamson Road, Mooresville
Iredell County
to receiving waters designated as Lake Norman (Reeds Creek Arm) in the Catawba River Basin in
accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
II, III and IV hereof.
This permit modification (MOD) shall become effective June 1, 2018.
This permit and authorization to discharge shall expire at midnight on March 31, 2020.
signed this day May 10, 2018.
da Culpepper, Interim Dir
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 9

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Permit NC0074772
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 permitbearing 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.
AQUA North Carolina, Inc.
is hereby authorized to:
1. continue to operate an existing 0.0731 MGD wastewater treatment system utilizing the following
components:
• influent includes trucked -in -filter backwash from potable -water treatment [ion -
exchange technology] from Subdivision water wells
• influent bar screen
• V-notch weir
•— flow=equalization tank
• duel (2) aeration basins
• dual (2) clarifiers
• aerated sludge holding tank
• tertiary filters
• tablet chlorination and dechlorination
• post aeration
• flow recorder
• effluent pump station
• standby power generator
these facilities located at the Diamond Head WWTP, 799 Williamson Road, near Mooresville, Iredell
County; and
2. discharge from said treatment works via Outfall 001, located on the attached map, into Lake Norman
(Reeds Creek Arm), stream index 11-(75), a waterbody currently classified WS-IV; B; CA within
subbasin 03-08-32 [HUC: 03050101] of the Catawba River Basin; and '
3. after receiving an Authorization to Construct (ATC) permit from the Division to expand flow (not to
exceed 0.100 MGD); and after submitting to the Division an Engineers Certification form
documenting that upgrades were completed in accord with this permit and the ATC, then
4. discharge from said treatment works via Outfa11001, located on the attached map, into Lake Norman
(Reeds Creek Arm), stream index 11-(75), a waterbody currently classified WS-IV; B; CA within
subbasin 03-08-32 [HUC: 03050101] of the Catawba River Basin.
Page 2 of 9

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Permit NC0074772
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expansion above 0.0731 MGD,
[see page 2 of 8] the Permittee is authorized to discharge from Outfall 001. Such discharges shall be limited,
monitored and reported 1 by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
' ' [Parameter Codes]
LIMITS
MONITORING
REQUIREMENTS
Sample
Type :
1
Sample
P
Location 2
_
Monthly
Average
• Daily
Maximum
Measureme
nt
Frequency
Flow
50050
0.0731 MGD
0.100 MGD 3
Continuous
Recording
I or E
Total Residual Chlorine 4
50060
28 gg/L
2/Week
Grab
E
BOD, 5 day (20°C)
C0310
15.0 mg/L
22.5 mg/L
Weekly
Composite
E
Total Suspended Solids
C0530
30.0 mg/L
45.0 mg/L
Weekly
Composite
E
Ammonia (NH3 as N)
C0610
4.0 mg/L
20.0 mg/L
Weekly
Composite
E
Dissolved Oxygen
00300
Daily Average > 5.0 mg/L
Weekly
Grab
E
pH
00400
Not < 6.0 or > 9.0 s. u.
Weekly
Grab
E
Fecal Coliform (geometric
mean)
31616
200/100 mL
400/100 mL
Weekly
Grab
E
Temperature (°C)
00010
Weekly
Grab
E
Total Hardness — as [CaCO3 or
(Ca + Mg)] (mg/L)
00900
-Quarterly
Composite
E
Total Hardness — as [CaCO3 or
(Ca +-Mg)] (mg/L)
00900
Quarterly
Grab
U
Total Copper
01042
7.88 gg/L 5
10.47 µg/L 5
Quarterly
Composite
E
Total Fluoride
00951
1,800 gg/L 5' 6
1,800 µg/L 5' 6
Quarterly
Composite
E
Total Chloride
00940
230 mg/L 5
250 mg/L 5
Quarterly
Composite
E
Total Zinc
01092
125.7 gg/L 5
125.7 µg/L 5
Quarterly
Composite
E
Total Nitrogen (mg/L) 7
(NO2 + NO3 + TKN)
C0600
Monitor & Report
Quarterly
Composite
E
Total Phosphorus (mg/L)
C0665
Monitor & Report
Quarterly
Composite
E
Combined radium-226 and
radium-228 (pCi/L) 8' 9
11503
5 pCi/L (annual ave.)
'Quarterly
Composite
E
Alpha emitters, excluding radon
and uranium (pCi/L) 8, 9
82077
15 pCi/L (annual ave.)
Quarterly
Composite
E
Beta emitters, excluding K-40
and other naturally occurring
radionuclides (pCi/L) 8 9
03520
50 pCi/L (annual ave.)
Quarterly
Composite
E
Tritium (pCi/L) 8' 9
82126
- 20,000 pCi/L (annual ave.)
Quarterly
Composite
E
Strontium-90 (pCi/L) 8' 9
13501
8 pCi/L (annual ave.)
Quarterly
Composite
E
Uranium (µg/L) 8' 9' 10
22708
30 gg//L (weekly ave.) 9
Quarterly
Composite
E
Whole Effluent Toxicity
(r)11
TGP3B
Quarterly
Grab
E
See Footnotes, Page 4
Page 3 of 9

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Permit NC00744772 •
Table A. (1.) Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using the Division's
electronic Discharge Monitoring Report System (eDMR) system [see A. (5)].
_2... E = Effluent; I = Influent; U = Upstream -
3. Discharge at 0.100 MGD is permitted only after applying for, and receiving the Division's
Authorization to Construct (ATC) permit and submitting an Engineers Certification form (see
page 2 of 9).
4. The Division shall consider compliant all effluent TRC values reported below 50 µg/L. However,
the Permittee shall continue to record and submit all values reported by a North Carolina -certified
test method (including field certified), even if these values fall below 50 µg/L.
5. Compliance to this limit begins on April 1, 2020, approximately 23 months from the permit
effective date.
6. Limit applies. only if fluoride is added by the Permittee.
7. For a given wastewater sample, TN = TKN + (NO2-N + NO3 N), where TN is Total Nitrogen and
TKN is Total Kjeldahl Nitrogen, and (NO2-N + NO3-N) is Nitrite/Nitrate Nitrogen. — — 8. If the quarterly value exceeds 4 times the annual average limit, then (a) the sampling frequency
shall increase to Monthly and (b) a written notification shall be sent to the Water Quality
Permitting Section and the Division's Mooresville Regional Office.
9. This sample shall be taken promptly within 72 to 80 hours after each introduction of offsite
wastewater into the equalization tank. If an introduction of offsite wastewater does not occur
within a given calendar quarter, a sample shall be taken of the effluent and noted in the DMR and
eDMR Comments as "No introduction of offsite wastewater occurred during this quarter."
10. Because Uranium is limited as a Weekly Average, [adopted federal criteria 40CFR 141.26], a
quarterly value may be determined from one (1) quarterly sample, or by averaging multiple
samples taken within a restricted time period, not -to -exceed a calendar week [Sunday thru
Saturday].
11. WET Testing, Chronic; Quarterly using Ceriodaphnia dubia, limited [TGP3B]; effluent
concentration at 90% during the months of January, April, July and October [See A. (2.)].
Compliance to WET testing begins on April 1, 2020, or upon DWR's approval of the Permittee's
dilution study results -[see Special -Condition -A. (5.)].
Conditions:
1. The Permittee shall discharge no floating solids or foam visible -in other than trace amounts:
2. Effluent samples shall accurately represent the physical and chemical character of the discharge:
Page 4 of 9

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Permit NC0074772
A. (2.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B.0200, et. seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 90 %.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure" (revised December 2010 or subsequent versions),
or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (revised- December 2010 or
subsequent versions). 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.
If the test procedure, performed as the first test of any single quarter, results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months, as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure" (revised -December 2010), or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent to the
following address:
Attention: North Carolina Division. of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water 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, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
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 Water Sciences Section at the
address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter,
which is the three-month time interval that begins on the first day of the month in which toxicity testing is
required by this permit and continues until the fmal day of the third month.
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.
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.
Page 5 of 9

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Permit NC0074772
A. (3.) SPECIAL CONDITION — Operations
[G.S. 143-215.1C.]
(a) Inspect the performance of the plant's disinfection system every weekday and
- maintain a log of such inspections; -and
(b) Operate a Supervisory Control and Data Acquisition (SCADA) system at the plant.
A. (4.) SPECIAL CONDITION — Spill Notification
[G.S. 143-215.1C.]
(a) Contacting Public Health Directors
The facility must notify the Iredell and Mecklenburg County Public Health Directors Within 12 hours of first
knowledge by the owner/operator of any discharge of untreated wastewater to waters of the State or a discharge
from the wastewater treatment plant that has not received adequate disinfection due to a malfunctioning treatment
unit.
The County Public Health Directors can lie contacted using the following information:
Iredell County Health Director
318 Turnersburg Highway
Statesville, NC 28625
704-878-5300
(b) Public Notification
Mecklenburg County Health Director
249 Billingsley Road
Charlotte, NC 28211
704-336-4700
The facility must notify the public of untreated wastewater spills. Wastewater facility owners or operators must
issue a press release after a discharge to surface waters of 1,000 gallons within 24 hours of first knowledge of the
spill by the owner/operator. The press release must be issued to "all electronic and print news media outlets that
provide general coverage in the county where the discharge occurred." A copy of the press release must be
maintained for one year by the owner/operator. This press release is required in addition to the permit
requirement of contacting the North Carolina Division of Water Resources (DWR).
If a discharge of 15,000 gallons or more reaches surface water, a public notice is required in addition to the press
release. The public notice must be placed in a newspaper having general circulation in the County in which the
discharge occurred and the county immediately downstream. The owner or operator shall publish the notice
within 10 days after the Secretary has determined the countries that are significantly affected by the discharge and
approved the form and content of the notice and the newspaper in which the notice is to be published. At a
minimum the notice should be published in a newspaper of general circulation in Iredell and Mecklenburg
Counties. If a discharge of 1,000,000 gallons of wastewater or more reaches surface waters, the DWR regional
office must be contacted to determine in what additional counties, if any, a public notice must be published. A
copy of these public notices and proof of publication must be sent to the DWR within 30 days of publication.
The copy should be sent to the following address:
Division of Water Resources
PERCS Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
The minimum content of the notice is the location of the discharge, estimated volume, water body affected and
steps taken to prevent future discharges.
Page 6 of 9

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Permit NC0074772
A. (5.) SPECIAL CONDITION - STUDY TO ESTABLISH DILUTION
[G.S. 143-215.1(C)]
To establish effluent dilution credit, the Permittee shall submit to DWR a Study Plan and
recommendations for dilution modeling. This plan may address the existing end -of -pipe effluent
"deflector plate" or other diffuser, as approved by the Division.
The Permittee shall submit this plan to:
DEQ/NCDWRINPDES Unit
1617 Mail Service Center, Raleigh, NC 27699
attention Teresa Rodriguez
[[e-mail]]; 919-807-6387
This plan shall recommend steps needed to establish an instream waste concentration (1WC) at the point
of discharge. Upon plan approval, the Permittee shall conduct the study, and submit to DWR the results,
findings and conclusions. Following approval, the Division may adjust permit limits and monitoring
conditions in accord with the revised effluent conditions, as data may warrant. If approved before permit
expiration (March 30, 2020), the Division may apply this dilution credit to the permit.
A. (6.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,
2015.
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
e Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)]
The permittee shall report 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
Page 7 of 9

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Permit NC0074(772
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 DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
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. See "How to Request- a Waiver from Electronic Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the moiith-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.
Starting on December 21, 2020, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
2.- Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time
of each electronic submission. The permittee should use the EPA's website resources to identify the
initial recipient for the electronic submission. .
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity
for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at: https://www.federalregister.gov/documents/2015/10/22/2015-
24954/national-pollutant-discharge-elimination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
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Permit NC0074772
ow to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to
the Division. Requests for temporary electronic reporting waivers 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 submitting monitoring data and reports. The duration of a
temporary waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data
and reports shall be submitted electronically to the Division unless the permittee re -applies for and is
granted a new temporary electronic reporting waiver by the Division. Approved electronic reporting
waivers are not transferrable. Only permittees with an approved reporting waiver request may
submit monitoring data and reports on paper to the Division for the period that the approved
reporting waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section. B. (11.) (d)1
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://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION
WILL BE ACCEPTED:
"I certify, 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 inquiiy 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."
5. Records Retention [Supplements Section D. (6.)1
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].
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Outfall 001
Lat 35° 33' 52"
Long 80 ° 51' 58"
•g")
WWTP approximate location
AQUA North Carolina
Diamond Head Subdivision WWTP
Receiving Stream:
Stream Segment:
State Grid/Quad:
Sub -Basin:
Lake Norman [Reeds Creek Branch]
11-(75) Stream Class: WS-IV; B; CA
EI5SE / Mooresville, NC River Basin: Catawba River
03-08-32 HUC: 03050101
North I
NPDES Permit NC0074772
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PART II
STANDARD CONDITIONS FOR NPDES PERMITS
Section A. Definitions
2/Month
Samples are collected twice per month with at least ten calendar days between sampling events. These samples shall be
representative of the wastewater discharged during the sample period.
3/Week
Samples are collected three times per week on three separate calendar days. These samples shall be representative of
the wastewater discharged during the sample period.
Act or "the Act"
The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, 33 USC 1251, et.
seq.
Annual Average
The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar year. In the case of fecal
coliform, the geometric mean of such discharges.
Arithmetic Mean
The summation of the individual values divided by the number of individual values.
Bypass
The known diversion of waste streams from any portion of a treatment facility including the collection system, which is
not a designed or established or operating mode for the facility.
Calendar Day
The period from midnight of one day until midnight of the next day. However, for purposes of this permit, any
consecutive 24-hour period -that reasonably represents the calendar day may be used for sampling.
Calendar Week
The period from Sunday through the following Saturday.
Calendar Quarter
One of the following distinct periods: January through March, April through June, July through September, and
October through December.
Composite Sample
A sample collected over a 24-hour period by continuous sampling or combining grab samples of at least 100 mL in
such a manner as to result in a total sample representative of the wastewater discharge during the sample period. The
Director may designate the most appropriate method (specific number and size of aliquots necessary, the time interval
between grab samples, etc.) on a case -by -case basis. Samples may be collected manually or automatically. Composite
samples may be obtained by the following methods:
(1) Continuous: a single, continuous sample collected over a 24-hour period proportional to the rate of flow.
(2) Constant time/variable volume: a series of grab samples collected at equal time intervals over a 24 hour period
of discharge and combined proportional to the rate of flow measured at the time of individual sample
collection, or
(3) Variable time/constant volume: a series of grab samples of equal volume collected over a 24 hour period with
the time intervals between samples determined by a preset number of gallons passing the sampling point. Flow
measurement between sample intervals shall be determined by use of a flow recorder and totalizer, and the
preset gallon interval between sample collection fixed at no greater than 1/24 of the expected total daily flow at
the treatment system, or
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(4) Constant time/constant volume: a series of grab samples_of equal volume collected over a 24-hour period at a
constant time interval. Use of this method requires prior approval by the Director. This method may only be
used in situations where effluent flow rates vary less than 15 percent. The following restrictions also apply,
> Influent and effluent grab samples shall be of equal size and of no less than 100 milliliters
> Influent samples shall not be collected more than once per hour.
> Permittees with wastewater treatment systems whose detention time < 24 hours shall collect effluent grab
samples at intervals of no greater than 20 minutes apart during any 24-hour period.
> Permittees with wastewater treatment systems whose detention time exceeds 24 hours shall collect effluent
grab samples at least every six hours; there must be a minimum of four samples during a 24-hour sampling
period.
Continuous flow measurement
Flow monitoring that occurs without interruption throughout the operating hours of the facility. Flow shall be
monitored continually except for the infrequent times when there may be no flow or for infrequent maintenance
activities on the flow device.
Daily Discharge
The discharge of a pollutant measured during a calendar day or any 24-hour period that reasonably represents the
calendar day for purposes of sampling. For pollutants measured in units of mass, the "daily discharge" is calculated as
the total mass of the pollutant discharged over the day. For pollutants expressed in other units of measurement, the
"daily discharge" is calculated as the average measurement of the pollutant over the day. (40 CFR 122.2; see also
"Composite Sample," above.)
Daily Maximum
The highest "daily discharge" during the calendar month.
Daily Sampling
Parameters requiring daily sampling shall be sampled 5 out of every 7 days per week unless otherwise specified in the
permit. Sampling shall be conducted on weekdays except where holidays or other disruptions of normal operations
prevent weekday sampling. If sampling is required for all seven days of the week for any permit parameter(s), that
requirement will be so noted on the Effluent Limitations and Monitoring Page(s).
DWR or "the Division"
The Division of Water Resources, Department of Environmental Quality.
Effluent
Wastewater discharged following all treatment processes from a water pollution control facility or other point source
whether treated or untreated.
EMC
The North Carolina Environmental Management Commission
EPA
The United States Environmental Protection Agency
Facility Closure
Cessation of all activities that require coverage under this NPDES permit. Completion of facility closure will allow this
permit to be rescinded.
Geometric Mean
The Nth root of the product of the individual values where N = the number of individual values. For purposes of
calculating the geometric mean, values of "0" (or "< [detection level]") shall be considered = 1.
Grab Sample
Individual samples of at least 100 mL collected over a period of time not exceeding 15 minutes. Grab samples can be
collected manually. Grab samples must be representative of the discharge (or the receiving stream, for instream
samples).
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Hazardous Substance
Any substance designated under 40 CFR Part 116 pursuant to Section 311 of the CWA.
Instantaneous flow measurement
The flow measured during the minimum time required for the flow measuring device or method to produce a result in
that instance. To the extent practical, instantaneous flow measurements coincide with the collection of any grab
samples required for the same sampling period so that together the samples and flow are representative of the discharge
during that sampling period.
Monthly Average (concentration limit)
The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar month. In the case of fecal
coliform or other bacterial parameters or indicators, the geometric mean of such discharges.
Permit Issuing Authority
The Director of the Division of Water Resources.
Quarterly Average (concentration limit)
The arithmetic mean of all samples taken over a calendar quarter.
Severe property damage
Substantial physical damage to property, damage to the treatment facilities which causes them to become inoperable, or
substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a
bypass. Severe property damage excludes economic loss caused by delays in production.
Toxic Pollutant:
Any pollutant listed as toxic under Section 307(a)(1) of the CWA.
Upset
An incident beyond the reasonable control of the Permittee causing unintentional and temporary noncompliance with
permit effluent limitations and/or monitoring requirements. An upset does not include noncompliance caused by
operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive
maintenance, or careless or improper operation.
Weeldy Average (concentration limit)
The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar week. In the case of fecal
coliform or other bacterial parameters or indicators, the geometric mean of such discharges.
Section 13. General Conditions
1. Duty to Comply
The Permittee must comply with all conditions of this permit. Any permit noncompliance constitutes a violation of
the CWA and is grounds for enforcement action; for permit termination, revocation and reissuance, or
modification; or denial of a permit renewal application [40 CFR 122.41].
a. The Permittee shall comply with effluent standards or prohibitions established under section 307(a) of the
CWA for toxic pollutants and with standards for sewage sludge use or disposal established under section
405(d) of the CWA within the time provided in the regulations that establish these standards or prohibitions or
standards for sewage sludge use or disposal, even if the permit has not yet been modified to incorporate the
requirement.
b. The CWA provides that any person who violates section[s] 301, 302, 306, 307, 308, 318 or 405 of the Act, or
any permit condition or limitation implementing any such sections in a permit issued under section 402, or any
requirement imposed in a pretreatment program approved under sections 402(a)(3) or 402(b)(8) of the Act, is
subject to a civil penalty not to exceed $37,500 per day for each violation. [33 USC I319(d) and 40 CFR
122.41(a)(2)]
c. The CWA provides that any person who negligently violates sections 301, 302, 306, 307, 308, 318, or 405 of
the Act, or any condition or limitation implementing any of such sections in a permit issued under section 402
of the Act, or any requirement imposed in a pretreatment program approved under section 402(a)(3) or
402(b)(8) of the Act, is subject to criminal penalties of $2,500 to $25,000 per day of violation, or
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imprisonment of not more than 1 year, or both. In the case of a second or subsequent convictionfor a_negligent_
violation, a person shall be subject to criminal penalties of not more than $50,000 per day of violation, or by
imprisonment of not more than 2 years, or both. [33 USC 1319(c)(1) and 40 CFR 122.41(a)(2)]
d. __ My person who knowingly violates such sections, or such conditions or limitations is_subjectto criminal. _
penalties of $5,000 to $50,000 per day of violation, or imprisonment for not more than 3 years, or both. In the
case of a second or subsequent conviction for a knowing violation, a person shall be subject to criminal
penalties of not more than $100,000 per day of violation, or imprisonment of not more than 6 years, or both.
[33 USC 1319(c)(2) and 40 CFR 122.41(a)(2)]
e. Any person who knowingly violates section 301, 302, 303, 306, 307, 308, 318 or 405 of the Act, or any permit
condition or limitation implementing any of such sections in a permit issued under section 402 of the Act, and
who knows at that time that he thereby places another person in imminent danger of death or serious bodily
injury, shall, upon conviction, be subject to a fine of not more than $250,000 or imprisonment of not more than
15 years, or both. In the case of a second or subsequent conviction for a knowing endangerment violation, a
person shall be subject to a fine of not more than $500,000 or by imprisonment of not more than 30 years, or
both. An organization, as defined in section 309(c)(3)(B)(iii) of the CWA, shall, upon conviction of violating
the imminent danger provision, be subject to a fine of not more than $1,000,000-and can be fined up to
$2,000,000 for second or subsequent convictions. [40 CFR 122.41(a)(2)]
f. Under state law, a civil penalty of not more than $25,000 per violation may be assessed against any person
who violates or fails to act in accordance with the terms, conditions, or requirements of a permit. [North
Carolina General Statutes § 143-215.6A]
Any person may be assessed an administrative penalty by the Administrator for violating section 301, 302,
306, 307, 308, 318 or 405 of this Act, or any permit condition or limitation implementing any of such sections
in a permit issued under section 402 of this Act. Administrative penalties for Class I violations are not to
exceed $16,000 per violation, with the maximum amount of any Class I penalty assessed not to exceed
$37,500. Penalties for Class II violations are not to exceed $16,000 per day for each day during which the
violation continues, with the maximum_amount of any Class II penalty not to exceed $177,500. [33 USC
1319(g)(2) and 40 CFR 122.41(a)(3)]
2. Duty to Mitigate
The Permittee shall take all reasonable steps to minimize or prevent any discharge or sludge use or disposal in
violation of this permit with a reasonable likelihood of adversely affecting human health or the environment [40
CFR 122.41(d)].
3. Civil and Criminal Liability
Except as provided in permit conditions on "Bypassing" (Part II.C.4), "Upsets" (Part II.C.5) and "Power Failures"
(Part II.C.7), nothing in this permit shall be construed to relieve the Permittee from any responsibilities, liabilities,
or penalties for noncompliance pursuant to NCGS 143-215.3, 143-215.6 or Section 309 of the Federal Act, 33 USC
1319. Furthermore, the Permittee is responsible for consequential damages, such as fish kills, even though the
responsibility for effective compliance may be temporarily suspended.
4. Oil and Hazardous Substance Liability
Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the Permittee
from any responsibilities, liabilities, or penalties to which the Permittee is or may be subject to under NCGS 143-
215.75 et seq. or Section 311 of the Federal Act, 33 USG 1321. Furthermore, the Permittee is responsible for
consequential damages, such as fish kills, even though the responsibility for effective compliance may be
temporarily suspended.
5. Property Rights
The issuance of this permit does not convey any property rights in either real or personal property, or any exclusive
privileges, nor does it authorize any injury to private property or any invasion of personal rights, nor any
infringement of Federal, State or local laws or regulations [40 CFR 122.41(g)].
6. Onshore or Offshore Construction
This permit does not authorize or approve the construction of any onshore or offshore physical structures or
facilities or the undertaking of any work in any navigable waters.
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7. Severability
The provisions of this permit are severable. If any provision of this permit, or the application of any provision of
this permit to any circumstances, is held invalid, the application of such provision to other circumstances, and the
remainder of this permit, shall not be affected thereby [NCGS 150B-23].
8. Duty to Provide Information
The Permittee shall furnish to the Permit Issuing Authority, within a reasonable time, any information which the
Permit Issuing Authority may request to determine whether cause exists for modifying, revoking and reissuing, or
terminating this permit or to determine compliance with this permit. The Pennittee shall also furnish to the Permit
Issuing Authority upon request, copies of records required by this permit [40 CFR 122.41(h)].
9. Duty to Reapply
If the Permittee wishes to continue an activity regulated by this permit after the expiration date of this permit, the
Permittee must apply for and obtain a new permit [40 CFR 122.41(b)].
10. Expiration of Permit
The Permittee is not authorized to discharge after the expiration date. In order to receive automatic authorization to
discharge beyond the expiration date, the Permittee shall submit such information, forms, and fees as are required
by the agency authorized to issue permits no later than 180 days prior to the expiration date unless permission for a
later date has been granted by the Director. (The Director shall not grant permission for applications to be
submitted later than the expiration date of the existing permit.) [40 CFR 122.21(d)] Any Permittee that has not
requested renewal at least 180 days prior to expiration, or any Permittee that does not have a permit after the
expiration and has not requested renewal at least 180 days prior to expiration, will subject the Permittee to
enforcement procedures as provided in NCGS 143-215.6 and 33 USC 1251 et. seq.
11. Signatory Requirements
All applications, reports, or information submitted to the Permit Issuing Authority shall be signed and certified [40
CFR 122.41(k)].
a. All permit applications shall be signed as follows:
(1) For a corporation: by a responsible corporate officer. For the purpose of this Section, a responsible
corporate officer means: (a) a president, secretary, treasurer or vice president of the corporation in charge
of a principal business function, or any other person who performs similar policy or decision making
functions for the corporation, or (b) the manager of one or more manufacturing, production, or operating
facilities, provided, the manager is authorized to make management decisions which govern the operation
of the regulated facility including having the explicit or implicit duty of making major capital investment
recommendations, and initiating and directing other comprehensive measures to assure long term
environmental compliance with environmental laws and regulations; the manager can ensure that the
necessary systems are established or actions taken to gather complete and accurate information for permit
application requirements; and where authority to sign documents has been assigned or delegated to the
manager in accordance with corporate procedures .
(2) For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or
(3) For a municipality, State, Federal, or other public agency: by either a principal executive officer or
ranking elected official [40 CFR 122.22].
b. All reports required by the permit and other information requested by the Permit Issuing Authority shall be
signed by a person described in paragraph a. above or by a duly authorized representative of that person. A
person is a duly authorized representative only if:
(1) The authorization is made in writing by a person described above;
(2) The authorization specified either an individual or a position having responsibility for the overall operation
of the regulated facility or activity, such as-tlie positionof plant manager, operator of a well or well field,
superintendent, a position of equivalent responsibility, or an individual or position having overall
responsibility for environmental matters for the company. (A duly authorized representative may thus be
either a named individual or any individual occupying a named position.); and
(3) The written authorization is submitted to the Permit Issuing Authority [40 CFR 122.22]
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c. Changes to authorization: If an authorization under paragraph (b) of this section is no Ionger accurate because
a different individual or position has responsibility for the overall operation of the facility, a new authorization
satisfying the requirements of paragraph (b) of this section must be submitted to the Director prior to or
together with any reports, information, or applications to be signed by an authorized representative [40 CFR
122.22] -
d. Certification. Any person signing a document under paragraphs a. or b. of this section shall make the following
certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED:
"1 certify, 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 sign f cant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
12. Permit Actions
This permit may be modified, revoked and reissued, or terminated for cause. The filing of a request by the
—Permittee for a permit modification, revocation and reissuance, or termination; or a notification of planned changes
or anticipated noncompliance does not stay any permit condition [40 CFR 122.41(f)].
13. Permit Modification, Revocation and Reissuance, or Termination
,The issuance of this permit does not prohibit the permit issuing authority from reopening and modifying the permit,
revoking and reissuing the permit, or terminating the permit as allowed by the laws, rules, and regulations
contained in Title 40, Code of Federal Regulations, Parts 122 and 123; Title 15A of the North Carolina
Administrative Code, Subchapter 02H .0100; and North Carolina General Statute 143.215.1 et. al.
14. Annual Administering and Compliance Monitoring Fee Requirements
The Permittee must pay the annual administering and compliance monitoring fee within thirty days after being
billed by the Division. Failure to pay the fee in a timely manner in accordance with 15A NCAC 02H .0105(b)(2)
may cause this Division to initiate action to revoke the permit.
Section C. Operation and Maintenance of Pollution Controls
1. Certified Operator
Owners of classified water pollution control systems must designate operators, certified by the Water Pollution
Control System Operators Certification Commission (WPCSOCC), of the appropriate type and grade for the
system, and, for each classification must [T15A NCAC 08G .0201]:
a. designate one Operator In Responsible Charge (ORC) who possesses a valid certificate of the type and grade at
least equivalent to the type and grade of the system;
b. designate one or more Back-up Operator(s) in Responsible Charge (Back-up ORCs) who possesses a valid
certificate of the type of the system and no more than one grade less than the grade of the system, with the
exception of no backup operator in responsible charge is required for systems whose minimum visitation
requirements are twice per year; and
c. submit a signed completed "Water Pollution Control System Operator Designation Form" to the Commission
(or to the local health department for owners of subsurface systems) countersigned by the designated certified
operators, designating the Operator in Responsible Charge (ORC) and the Back-up Operator in Responsible
Charge (Back-up ORC):
(1) 60 calendar days prior to wastewater or residuals being introduced into a new system; or
(2) within 120 calendar days following:
> receiving notification of a change in the classification of the system requiring the designation of a new
Operator in Responsible Charge (ORC) and Back-up Operator in Responsible Charge (Back-up ORC)
of the proper type and grade; or
➢ a vacancy in the position of Operator in Responsible Charge (ORC) or Back-up Operator in
Responsible Charge (Back-up ORC).
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(3) within seven calendar days of vacancies in both ORC and Back-up ORC positions replacing or designating
at least one of the responsibilities.
The ORC of each Class I facility (or the Back-up ORC, when acting as surrogate for the ORC) must:
> Visit the facility as often as is necessary to insure proper operation of the treatment system; the treatment
facility must be visited at least weeldy
> Comply with all other conditions of 15A NCAC 08G .0204.
The ORC of each Class II, III and IV facility (or the Back-up ORC, when acting as surrogate for the ORC) must:
> Visit the facility as often as is necessary to insure proper operation of the treatment system; the treatment
facility must be visited at least five days per week, excluding holidays
> Properly manage and document daily operation and maintenance of the facility
> Comply with all other conditions of 15A NCAC 08G .0204.
2. Proper Operation and Maintenance
The Permittee shall at all times properly operate and maintain all facilities and systems of treatment and control
(and related appurtenances) which are installed or used by the Permittee to achieve compliance with the conditions
of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality
assurance procedures. This provision requires the Permittee to install and operate backup or auxiliary facilities only
when necessary to achieve compliance with the conditions of the permit [40 CFR 122.41(e)].
NOTE: Properly and officially designated operators are fully responsible for all proper operation and maintenance
of the facility, and all documentation required thereof, whether acting as a contract operator [subcontractor] or a
member of the Permittee's staff.
3. Need to Halt or Reduce not a Defense
It shall not be a defense for a Permittee in an enforcement action that it would have been necessary to halt or
reduce the permitted activity in order to maintain compliance with the condition of this permit [40 CFR 122.41(c)].
4. Bypassing of Treatment Facilities
a. Bypass not exceeding limitations [40 CFR 122.41(m)(2)]
The Permittee may allow any bypass to occur which does not cause effluent limitations to be exceeded, but
only if it also is for essential maintenance to assure efficient operation. These bypasses are not subject to the
provisions of Paragraphs b. and c. of this section.
b. Notice [40 CFR 122.41(m)(3)]
(1) Anticipated bypass. If the Permittee knows in advance of the need for a bypass, it shall submit prior notice,
if possible at least ten days before the date of the bypass; including an evaluation of the anticipated quality
and effect of the bypass.
(2) Unanticipated bypass. The Permittee shall submit notice of an unanticipated bypass as required in Part
II.E.6. (24-hour notice).
c. Prohibition of Bypass
(1) Bypass from the treatment facility is prohibited and the Permit Issuing Authority may take enforcement
action against a Permittee for bypass, unless:
(A) Bypass was unavoidable to prevent loss of life, personal injury or severe property damage;
(B) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities,
retention of untreated wastes or maintenance during normal periods of equipment downtime. This
condition is not satisfied if adequate backup equipment should have been installed in the exercise of
reasonable engineering judgment to prevent a bypass which occurred during normal periods of
equipment downtime or preventive maintenance; and
(C) The Permittee submitted notices as required under Paragraph b. of this section.
(2) Bypass from the collection system is prohibited and the Permit Issuing Authority may take enforcement
action against a Permittee for a bypass as provided in any current or future system -wide collection system
permit associated with the treatment facility.
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(3) The Permit Issuing Authority may approve an anticipated bypass, after considering its adverse effects, if
the Permit Issuing Authority determines that it will meet the three conditions listed above in Paragraph c.
(1) of this section.
5. Upsets
Effeet of an upset [40 CFR 122.41(n)(2)]: An upset constitutes an affirmative defense to an action,brought for
noncompliance with such technology based permit effluent limitations if the requirements of paragraph,b. of
this condition are met. No determination made during administrative review of claims that noncompliance was
caused by upset, and before an action for noncompliance, is final administrative action subject to judicial
review.
b. Conditions necessary for a demonstration of upset: Any Permittee who wishes to establish the affirmative
defense of upset shall demonstrate, through properly signed, contemporaneous operating logs, or other relevant
evidence that:
(1) An upset occurred and that the Permittee can identify the cause(s) of the upset;
(2) The Permittee facility was at the time being properly operated; and
(3) The Permittee submitted notice of the upset as required in Part II.E.6.(b) of -this permit.----- -
(4) The Permittee complied with any remedial measures required under Part II.B.2. of this permit.
c. Burden of proof [40 CFR 122.41(n)(4)]: The Permittee seeking -to establish the occurrence -of an upset has
the burden of proof in any enforcement proceeding.
6. Removed Substances
Solids, sludges, filter backwash, or other pollutants removed in the course of treatment or control of wastewaters
shall be utilized/disposed of in accordance with NCGS 143-215.1 and in a manner such as to prevent any pollutant
from such materials from entering waters of the State or navigable waters of the United States except as permitted
by the Commission. The Permittee shall comply with all applicable state and Federal regulations governing the
disposal of sewage sludge, including 40 CFR 503, Standards for the Use and Disposal of Sewage Sludge; 40 CFR
Part 258, Criteria For Municipal Solid Waste Landfills; and 15A NCAC Subchapter 2T, Waste Not Discharged To
Surface Waters. The Permittee shall notify the Permit Issuing Authority of any significant change in its'sludge use
or disposal practices.
7. Power Failures
The Permittee is responsible for maintaining adequate safeguards (as required by 15A NCAC 02H .0124) to
prevent the discharge of untreated or inadequately treated wastes during electrical power failures either by means
of alternate power sources, standby generators or retention of inadequately treated effluent.
Section D. Monitoring and Records
1. Representative Sampling
Samples collected and measurements taken, as required herein, shall be representative of the permitted discharge.
Samples collected at a frequency less than daily shall be taken on a day and time that is representative of the
discharge for the period the sample represents. All samples shall be taken at the monitoring points specified in this
permit and, unless otherwise specified, before the effluent joins or is diluted by any other wastestream, body of
water, or substance. Monitoring points shall not be changed without notification to and the approval of the Permit
Issuing Authority [40 CFR 122.41(j)1
2. Reporting
Monitoring results obtained during the previous month(s) shall be summarized for each month and reported on a
monthly Discharge Monitoring Report (DMR) Form (MR 1, 1.1, 2, 3) or alternative forms approved by the
Director, postmarked no later than the last calendar day of the month following the completed reporting period.
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. Duplicate signed copies of these,
and all other reports required herein, shall be submitted to the following address:
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NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
3. Flow Measurements
Appropriate flow measurement devices and methods consistent with accepted scientific practices shall be selected
and used to ensure the accuracy and reliability of measurements of the volume of monitored discharges: The
devices shall be installed, calibrated and maintained to ensure that the accuracy of the measurements is consistent
with the accepted capability of that type of device. Devices selected shall be capable of measuring flows with a
maximum deviation of less than 10% from the true discharge rates throughout the range of expected discharge
volumes. Flow measurement devices shall be accurately calibrated at a minimum of once per year and maintained
to ensure that the accuracy of the measurements is consistent with the accepted capability of that type of device.
The Director shall approve the flow measurement device and monitoring location prior to installation.
Once -through condenser cooling water flow monitored by pump logs, or pump hour meters as specified in Part I of
this permit and based on the manufacturer's pump curves shall not be subject to this requirement.
4. Test Procedures
Laboratories used for sample analysis must be certified by the Division. Permittees should contact the Division's
Laboratory Certification Section (919 733-3908) or visit https://deq.nc.gov/about/divisions/water-resources/water-
resources-data/water-sciences-home-page/laboratory-certification-branch for information regarding laboratory
certifications.
Facilities whose personnel are conducting testing of field -certified parameters only must hold the appropriate field
parameter laboratory certifications.
Test procedures for the analysis of pollutants shall conform to the EMC regulations (published pursuant to NCGS
143-215.63 et. seq.), the Water and.Air Quality Reporting Acts, and to regulations published pursuant to Section
304(g), 33 USC 1314, of the CWA (as amended), and 40 CFR 136; or in the case of sludge use or disposal,
approved under 40 CFR 136, unless otherwise specified in 40 CFR 503, unless other test procedures have been
specified in this permit [40 CFR 122.41].
To meet the intent of the monitoring required by this permit, all test procedures must produce minimum detection
and reporting levels that are below the permit discharge requirements and all data generated must be reported down
to the minimum detection or lower reporting level of the procedure. If no approved methods are determined
capable of achieving minimum detection and reporting levels below permit discharge requirements, then the most
sensitive (method with the lowest possible detection and reporting level) approved method must be used.
5. Penalties for Tampering
The CWA provides that any person who falsifies, tampers with, or knowingly renders inaccurate, any monitoring
device or method required to be maintained under this permit shall, upon conviction, be punished by a fine of not
more than $10,000 per violation, or by imprisonment for not more than two years per violation, or by both. If a
conviction of a person is for a violation committed after a first conviction of such person under this paragraph,
punishment is a fine of not more than $20,000 per day of violation, or by imprisonment of not more than 4 years,
or both [40 CFR 122.41].
6. Records Retention
Except for records of monitoring information required by this permit related to the Permittee's sewage sludge use
and disposal activities, which shall be retained for a period of at least five years (or longer as required by 40 CFR
503), the Permiee shall retain records of all monitoring information, including:
• all calibration and maintenance records
> all original strip chart recordings for continuous monitoring instrumentation
> copies of all reports required by this permit
> copies of all data used to complete the application for this permit
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These records or copies shall be maintained for a period of at least 3 years from the date of the sample,
measurement, report or application. This period may be extended by request of the Director at any time [40 CFR
122.41].
7. Recording Results
For each measurement or sample taken pursuant to the requirements of this permit, the Permittee shall record,the
following information [40 CFR 122.41]:
a. The date, exact place, and time of sampling or measurements;
b. The individual(s) who performed the sampling or measurements;
c. The date(s) analyses were performed;
d. The individual(s) who performed the analyses;
e. The analytical techniques or methods used; and
f. The results of such analyses.
8. Inspection and Entry
The Permittee shall allow the Director, or an authorized representative (including an authorized -contractor acting as
a representative of the Director), upon the presentation of credentials and other documents as may be required by
law, to;
a. Enter, at reasonable times, upon the Permittee's premises where a regulated facility or activity is located or
conducted, or where records must be kept under the conditions of this permit;
b. Have access to and copy, at reasonable times, any records that must be kept under the conditions of this permit;
c. Inspect at reasonable times any facilities, equipment (including monitoring and control equipment), practices,
or -operations regulated or required under this permit; and
d. Sample or monitor at reasonable times, for the purposes of assuring permit compliance or as otherwise
authorized by the CWA, any substances or parameters at any location [40 CFR 122.41(i)].
Section E Reporting Requirements
1. Change in Discharge
All discharges authorized herein shall be consistent with the terms and conditions of this permit. The discharge of
any pollutant identified in this permit more frequently than or at a level in excess of that authorized shall constitute
a violation of the permit.
2. Planned Changes
The Permittee shall give notice to the Director as soon as possible of any planned_ physical_ alterations_or additions ,
to the permitted facility [40 CFR 122.41(1)]. Notice is required only when:
a. The alteration or addition to a permitted facility may meet one of the criteria for new sources at 40 CFR
122.29(b); or
b. The alteration or addition could significantly change the nature or increase the quantity of pollutants
discharged. This notification applies to pollutants subject neither to effluent limitations in the permit, nor to
notification requirements under 40 CFR 122.42(a)(1); or
c. The alteration or addition results in a significant change in the Permittee's sludge use or disposal practices, and
such alteration, addition or change may justify the application of permit conditions that are different from or
absent in the existing permit, including notification of additional use or disposal sites not reported during the
permit application process or not reported pursuant to an approved land application plan.
3. Anticipated Noncompliance
The Permittee shall give advance notice to the Director of any planned changes to the permitted facility or other
activities that might result in noncompliance with the permit [40 CFR 122.41(1)(2)],
4. Transfers
This permit is not transferable to any person without prior written notice to and approval from the Director in
accordance with 40 CFR 122.61. The Director may condition approval in accordance with NCGS 143-215.1, in
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particular NCGS 143-215.1(b)(4)b.2., and may require modification or revocation and reissuance of the permit, or
a minor modification, to identify the new permittee and incorporate such other requirements as may be necessary
under the CWA [40 CFR 122.41(1)(3), 122.61] or state statute.
5. Monitoring Reports
Monitoring results shall be reported at the intervals specified elsewhere in this permit [40 CFR 122.41(1)(4)].
a. Monitoring results must be reported on a Discharge Monitoring Report (DMR) (See Part II.D.2) or forms
provided by the Director for reporting results of monitoring of sludge use or disposal practices.
b. If the Permittee monitors any pollutant more frequently than required by this permit using test procedures
approved under 40 CFR Part 136 and at a sampling location specified in this permit or other appropriate
instrument governing the discharge, the results of such monitoring shall be included in the calculation and
reporting of the data submitted on the DMR.
6. Twenty-four Hour Reporting
a. The Permittee shall report to the Director or the appropriate Regional Office any noncompliance that
potentially threatens public health or the environment. Any information shall be provided orally within 24
hours from the time the Permittee became aware of the circumstances. A written submission shall also be
provided within 5 days of the time the Permittee becomes aware of the circumstances. The written submission
shall contain a description of the noncompliance, and its cause; the period of noncompliance, including exact
dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to
continue; and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance [40
CFR 122.41(1)(6)].
b. The Director may waive the written report on a case -by -case basis for reports under this section if the oral
report has been received within 24 hours.
c. Occurrences outside normal business hours may also be reported to the Division's Emergency Response
personnel at [phone] or [phone].
7. Other Noncompliance
The Permittee shall report all instances of noncompliance not reported under Part II.E.5 and 6. of this permit at the
time monitoring reports are submitted. The reports shall contain the information li �wd in Part II.E.6. of this permit
[40 CFR 122.41(1)(7)].
8. Other Information
Where the Permittee becomes aware that it failed to submit any relevant facts in a permit application, or submitted
incorrect information in a permit application or in any report to the Director, it shall promptly submit such facts or
information [40 CFR 122.41(1)(8)].
9. -Noncompliance Notification
The Permittee shall report by telephone to either the central office or the appropriate regional office of the Division
as soon as possible, but in no case more than 24 hours or on the next working day following the occurrence or first
knowledge of the occurrence of any of the following:
a. Any occurrence at the water pollution control facility which results in the discharge of significant amounts of
wastes which are abnormal in quantity or characteristic, such as the dumping of the contents of a sludge
digester; the lcnown passage of a slug of hazardous substance through the facility; or any other unusual
circumstances.
b. Any process unit failure, due to known or unknown reasons, that render the facility incapable of adequate
wastewater treatment such as mechanical or electrical failures of pumps, aerators, compressors, etc.
c. Any failure of a pumping station, sewer line, or treatment facility resulting in a by-pass without treatment of all
or any portion of the influent to such station or facility. -
Persons reporting such occurrences by telephone shall also file a written report within 5 days following first
knowledge of the occurrence. Also see reporting requirements for municipalities in Part IV.C.2.c. of this permit.
10. Availability of Reports
Except for data determined to be confidential under NCGS 143-215.3 (a)(2) or Section 308 of the Federal Act, 33
USC 1318, all reports prepared in accordance with the terms shall be available for public inspection at the offices
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of the Division. As required by the Act, effluent data shall not be considered confidential. Knowingly making any
false statement on any such report may result in the imposition of criminal penalties as provided for in NCGS 143-
215.1(b)(2) or in Section 309 of the Federal Act.
Penalties for Falsification of Reports
The CWA provides that any person who knowingly makes any false statement, representation, or certification in
any record or other document submitted or required to be maintained under this permit, including monitoring
reports or reports of compliance or noncompliance shall, upon,conviction, be punished by a fine of riot more than
$25,000 per violation, or by imprisonment for not more than two years per violation, or by both [40 CFR 122.41].
12. Annual Performance Reports
Permittees who own or operate facilities that primarily collect or treat municipal or domestic wastewater and have
an average annual flow greater than 200,000 gallons per day shall provide an annual report to the Permit Issuing
Authority and to the users/customers served by the Permittee (NCGS 143-215.1C). The report shall summarize the
performance of the collection or treatment system, as well as the extent to which the facility was compliant with
applicable Federal or State laws, regulations and rules pertaining to water quality. The report shall be provided no
later than sixty days after the end of the calendar or fiscal year, depending upon which annual period is used for
evaluation. .. --"_ -` - -`--
The report shall be sent to:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
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PART III
OTHER REQUIREMENTS
Section A. Construction
a. The Permittee shall not commence construction of wastewater treatment facilities, nor add to the plant's treatment
capacity, nor change the treatment process(es) utilized at the treatment plant unless (1) the Division has issued an
Authorization to Construct (AtC) permit or (2) the Permittee is exempted from such AtC permit requirements
under Item b. of this Section.
b. In accordance with NCGS 143-215.1(a5) [SL 2011-394], no permit shall be required to enter into a contract for the
construction, installation, or alteration of any treatment work or disposal system or to construct, install, or alter any
treatment works or disposal system within the State when the system's or work's principle function is to conduct,
treat, equalize, neutralize, stabilize, recycle, or dispose of industrial waste or sewage from an industrial facility and
the discharge of the industrial waste or sewage is authorized under a permit issued for the discharge of the
industrial waste or sewage into the waters of the State. Notwithstanding the above, the permit issued for the
discharge may be modified if required by federal regulation.
Issuance of an AtC will not occur until Final Plans and Specifications for the proposed construction have been
submitted by the Permittee and approved by the Division.
Section S. Groundwater Monitoring
The Permittee shall, upon written notice from the Director, conduct groundwater monitoring as may be required to
determine the compliance of this NPDES permitted facility with the current groundwater standards.
Section C. Changes in Discharges of Toxic Substances
The Permittee shall notify the Permit -Issuing Authority as soon as it knows or has reason to believe (40 CFR 122.42):
a. That any activity has occurred or will occur which would result in the discharge, on a routine or frequent basis, of
any toxic pollutant which is not limited in the permit, if that discharge will exceed the highest of the following
"notification levels";
(1) One hundred micrograms per liter (100 µg/L);
(2) Two hundred micrograms per liter (200 µg/L) for acrolein and acrylonitrile; five hundred micrograms per liter
(500 µg/L) for 2,4-dinitrophenol and for 2-methyl-4,6-dinitrophenol; and one milligram per liter (1 mg/L) for
antimony;
(3) Five times the maximum concentration value reported for that pollutant in the permit application.
b. That any activity has occurred or will occur which would result in any discharge, on a non -routine or infrequent
basis, of a toxic pollutant which is not limited in the permit, if that discharge will exceed the highest of the
following "notification levels";
(l) Five hundred micrograms per liter (500 µg/L);
(2) One milligram per liter (1 mg/L) for antimony;
(3) Ten times the maximum concentration value reported for that pollutant in the permit application.
Section D. Facility Closure Requirements
The Permittee must notify the Division at least 90 days prior to the closure of any wastewater treatment system covered
by this permit. The Division may require specific measures during deactivation of the system to prevent adverse
impacts to waters of the State. This permit cannot be rescinded while any activities requiring this permit continue at the
permitted facility.
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PART IV
SPECIAL CONDITIONS FOR MUNICIPAL FACILITIES
Section A. Definitions
In addition to the definitions in Part II of this permit, the following definitions apply to municipal facilities:
Indirect Discharge or Industrial User
Any non -domestic source that discharges wastewater containing pollutants into a POTW regulated under section
'307(b), (c) or (d) of the CWA. [40 CFR 403.3 (i) and (j) and 15A NCAC 02H .0903(b)(11)]
Interference
Inhibition or disruption of the POTW treatment processes; operations; or its sludge process, use, or disposal which
causes or contributes to a violation of any requirement of the Permittee's (or any satellite POTW's if different from the
Permittee) NPDES, collection system, or non -discharge permit or prevents sewage sludge use or disposal in
compliance with specified applicable State and Federal statutes, regulations, or permits. [15A NCAC 02H
.0903(b)(14)]
Pass Through
A discharge which exits the POTW into waters of the State in quantities or concentrations which, alone or with
discharges from other sources, causes a violation, including an increase in the magnitude or duration of a violation, of
the Permittee's (or any satellite POTW's, if different from the Permittee) NPDES, collection system, or non -discharge
permit. [15A NCAC 02H .0903(b)(23)]
Publicly —Owned Treatment Works (POTW)
A treatment works as defined by Section 212 of the CWA, which is owned by a State or local government organization.
This definition includes any devices and systems used in the storage, treatment, recycling and reclamation of municipal
sewage or industrial wastes of a liquid nature. It also includes the collection system, as defined in 15A NCAC 2T
.0402, only if it conveys wastewater to a POTW treatment plant. The term also means the local government
organization, or municipality, as defined in section 502(4) of the CWA, which has jurisdiction over indirect discharges
to and the discharges from such a treatment works. In this context, the organization may be the owner of the POTW
treatment plant or the owner of the collection system into which an indirect discharger discharges. This second type of
POTW may be referred to as a "satellite POTW organization." [15A NCAC 02H .0903(b)(26)]
"Significant Industrial User" or "SIU"
An Industrial User that discharges wastewater into a publicly owned treatment works and that [15A NCAC 02H
.0903(b)(33)]:
1. Discharges an average of 25,000 gallons per day or more of process wastewater to the POTW (excluding sanitary,
noncontact cooling and boiler blowdown wastewaters); or
2. Contributes process wastewater which makes up five percent or more of the NPDES or non -discharge permitted
flow limit or organic capacity of the POTW treatment plant. In this context, organic capacity refers to BOD, TSS
and ammonia; or
3. Is subject to categorical standards under 40 CFR Part 403.6 and 40 CFR Parts 405-471; or
4. Is designated as such by the Permittee on the basis that the Industrial User has a reasonable potential for adversely
affecting the POTW's operation or for violating any pretreatment standard or requirement, or the POTW's effluent
limitations and conditions in its NPDES or non -discharge permit, or to limit the POTW's sludge disposal options;
5. Subject to approval under 15A NCAC 02H .0907(b), the Permittee may determine that an Industrial User meeting
the criteria in paragraphs 1 or 2 of this definition above has no reasonable potential for adversely affecting the
POTW's operation or for violating any pretreatment standard or requirement, the POTW's effluent limitations and
conditions in its NPDES or non -discharge permit, or to limit the POTW's sludge disposal options, and thus is not a
Significant Industrial User (SIU); or '
6. Subject to approval under 15A NCAC 02H .0907(b), the Permittee may determine that an Industrial User meeting
the criteria in paragraph 3 of this definition above meets the requirements of 40 CFR Part 403.3(v)(2) and thus is a
non -significant categorical Industrial User.
Section B. Publicly Owned Treatment Works (POTWs)
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Section C. Municipal Control of Pollutants from Industrial Users.
1. Effluent limitations are listed in Part I of this permit. Other pollutants attributable to inputs from Industrial Users
discharging to the POTW may be present in the Permittee's discharge. At such time as sufficient information
becomes available to establish limitations for such pollutants, this permit may be revised to specify effluent
limitations for any or all of such other pollutants in accordance with best practicable technology or water quality
standards.
2. Prohibited Discharges
a. The Permittee shall develop and enforce their Pretreatment Program to implement the prohibition against the •
introduction of pollutants or discharges into the waste treatment system or waste collection system which
cause or contribute to Pass Through or Interference as defined in 15A NCAC 02H .0900 and 40 CFR 403. [40
CFR 403.5(a)(1)]
b. The Permittee shall develop and enforce their Pretreatment Program to implement the prohibitions against the
introduction of the following wastes in the waste treatment or waste collection system [40 CFR 403.5(b)]:
(1) Pollutants which create a fire or explosion hazard in the POTW, including, but not limited to,
wastestreams with a closed cup flashpoint of less than 140 degrees Fahrenheit or 60 degrees Centigrade
using the test methods specified in 40 CFR 261.21;
(2) Pollutants which cause corrosive structural damage to the POTW, but in no case discharges with pH lower
than 5.0, unless the works is specifically designed to accommodate such discharges;
Solid or viscous pollutants in amounts which cause obstruction to the flow in the POTW resulting in
Interference;
(4) Any pollutant, including oxygen demanding pollutants (BOD, etc.) released in a Discharge at a flow rate
and/or pollutant concentration which will cause Interference with the POTW;
Heat in amounts which will inhibit biological activity in the POTW resulting in Interference, but in no
case heat in such quantities that the temperature at the POTW Treatment Plant exceeds 40°C (104°F)
unless the Division, upon request of the POTW, approves alternate temperature limits;
(6) Petroleum oil, non -biodegradable cutting oil, or products of mineral oil origin in amounts that will cause
Interference or Pass Through;
(7) Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that
may cause acute worker health and safety problems; or
(8) Any trucked or hauled pollutants, except at discharge points designated by the POTW.
c. The Permittee shall investigate the source of all discharges into the POTW, including slug loads and other
unusual discharges, which have the potential to adversely impact the Permittee's Pretreatment Program and/or
the operation of the POTW.
The Permittee shall report such discharges into the POTW to the Director or the appropriate Regional Office.
Any information shall be provided orally within 24 hours from the time the Permittee became aware of the
circumstances. A written submission shall also be provided within 5 days of the time the Permittee becomes
aware of the circumstances. The written submission shall contain a description of the discharge; the
investigation into possible sources; the period of the discharge, including exact dates and times; if the
discharge has not ceased, the anticipated time it is expected to continue; and steps taken or planned to reduce,
eliminate, and prevent reoccurrence of the noncompliance, .
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All POTWs must provide adequate notice to the Director of the following [40 CFR 122.42(b)]:
1. Any new introduction of pollutants into the POTW from an indirect discharger, regardless of the means of
transport, which would be subject to section 301 or 306 of CWA if it were directly discharging those pollutants;
and
2. Any substantial change in the volume or character of pollutants being introduced by an indirect discharger as
influent to that POTW at the time of issuance of the permit.
3. For purposes of this paragraph, adequate notice shall include information on (1) the quality and quantity of effluent
introduced into the POTW, and (2) any anticipated impact that may result from the change of the quantity or
quality of effluent to be discharged from the POTW.
(3)
(5)
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3. With regard to the effluent requirements listed in Part I of this permit, it may be necessary for the Permittee to
supplement the requirements of the Federal Pretreatment Standards (40 CFR, Part 403) to ensure compliance by
the Permittee with all applicable effluent limitations. Such actions by the Permittee may be necessary regarding
some or all of the industries discharging to the municipal system.
4. The Permittee shall require any Industrial User (IU) discharging to the POTW to meet Federal Pretreatment''
Standards.developed under Section 307(b) of the Act as amended (which includes categorical standards'and
specific local limits, best management practices and narrative requirements). Prior to accepting wastewater from
any Significant Industrial User (SIU), the Permittee shall either develop and submit to the Division a new
Pretreatment Program or, as necessary, a modification of an existing Pretreatment Program, for approval as
required under section D below as well as 15A NCAC 02H .0907(a) and (b). [40 CFR 122.44G)(2)]
5. This permit shall be modified, or alternatively, revoked and reissued, to incorporate or modify an approved POTW
Pretreatment Program or to include a compliance schedule for the development of a POTW Pretreatment Program
as required under Section 402 (b)(8) of the CWA and implementing regulations or by the requirements of the
approved State pretreatment program, as appropriate.
Section D. Pretreatment Programs
Under authority of sections 307 (b) and (c) and 402(b)(8) of the CWA and implementing regulations 40 CFR 403,
North Carolina'General Statute 143-215.3(14) and implementing regulations 15A NCAC 02H .0900, and in accordance
with the approved pretreatment program, all provisions and regulations contained and referenced in the pretreatment
program submittal are an enforceable part of this permit. [40 CFR 122.44(j)(2)]
The Permittee shall operate its approved pretreatment program in accordance with Section 402(b)(8) of the CWA, 40
CFR 403, 15A NCAC 02H .0900, and the legal authorities, policies, procedures, and financial provisions contained in
its pretreatment program submission and Division approved modifications thereof. Such operation shall include but is
not limited to the implementation of the following conditions and requirements. Terms not defined in Part II or Part IV
of this permit are as defined in 15A NCAC 02H .0903 and 40 CFR 403.3.
1. Sewer Use Ordinance (SUO)
The Permittee shall maintain adequate legal authority to implement its approved pretreatment program. [15A
NCAC 02H .0903(b)(32), .0905 and .0906(b)(1); 40 CFR 403.8(f)(1) and 403.9(b)(1) and (2)]
2. Industrial Waste Survey (IWS)
The Permittee shall implement an IWS consisting of the survey of users of the POTW collection system or
treatment plant, as required by 40 CFR 403.8(f)(2)(i-iii) and 15A NCAC 02H .0905 [also 40 CFR 122.44(j)(1)],
including identification of all Industrial Users that may have an impact on the POTW and the character and amount
of pollutants contributed to the POTW by these Industrial Users and identification of those Industrial Users
meeting the definition of SIU. Where the-Permittee accepts wastewater from one or more satellite POTWs, the
IWS for the Permittee shall address all satellite POTW services areas, unless the pretreatment program in those
satellite service areas is administered by a separate Permittee with an approved Pretreatment Program. The
Permittee shall submit a summary of its IWS activities to the Division at least once every five,years, and as
required by the Division. The IWS submission shall include a summary of any investigations conducted under
paragraph C.2.c. of this Part. [15A NCAC 02H .0903(b)(13), .0905 and .0906(b)(2); 40 CFR 403.8(f)(2) and 403.9]
3. Monitoring Plan
The Permittee shall implement a Division -approved Monitoring Plan for the collection of facility specific data to
be used in a wastewater treatment plant Headworks Analysis (HWA) for the development of specific pretreatment
local limits. Effluent data from the Plan shall be reported on the DMRs (as required by Parts II.D and II.E.5.). [15A
NCAC 02H .0903(b)(16), .0906(b)(3) and .0905]
4. Headworks Analysis (HWA) and Local Limits
The Permittee shall obtain Division approval of a HWA at least once every five years, and as required by the
Division. Within 180 days of the effective date of this permit (or any subsequent permit modification) the
Permittee shall submit to the Division a written technical evaluation of the need to revise local limits (i.e., an
updated HWA or documentation of why one is not needed) [40 CFR 122.44]. The Permittee shall develop, in
accordance with 40 CFR 403.5(c) and 15A NCAC 02H .0909, specific Local Limits to implement the prohibitions
listed in 40 CFR 403.5(a) and (b) and 15A NCAC 02H .0909. Pursuant to 40 CFR 403.5, local limits are
Version 11/09/2011.2

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES Permit Standard Conditions
Page 17 of 18
enforceable Pretreatment Standards as defined by 40 CFR 403.3(1). [15A NCAC 02H .0903(b)(10), .0905, and
.0906(b)(4)]
5. Industrial User Pretreatment Permits (IUP) & Allocation Tables
In accordance with NCGS 143-215.1, the Permittee shall issue to all Significant Industrial Users, permits for
operation of pretreatment equipment and discharge to the Permittee's collection system or treatment works. These
permits shall contain limitations, sampling protocols, reporting requirements, appropriate standard and special
conditions, and compliance schedules as necessary for the installation of treatment and control technologies to
assure that their wastewater discharge will meet all applicable pretreatment standards and requirements. The
Permittee shall maintain a current Allocation Table (AT) which summarizes the results of the HWA and the limits
from all IUPs. Permitted IUP loadings for each parameter cannot exceed the treatment capacity of the POTW as
determined by the HWA. [15A NCAC 02H .0906(b)(6), .0909, .0916, and .0917; 40 CFR 403.5, 403.8(f)(1)(iii);
NCGS 143-215.67(a)]
6. Authorization to Construct (AtC)
The Permittee shall ensure that an Authorization to Construct permit (AtC) is issued to all applicable Industrial -
Users for the construction or modification of any pretreatment facility. Prior to the issuance of an AtC, the
proposed pretreatment facility and treatment process must be evaluated for its capacity to comply with all
Industrial User Pretreatment Permit (JUP) limitations. [15A NCAC 02H .0906(b)(7) and .0905; NCGS 143-
215.1(a)(8)]
7. POTW Inspection & Monitoring of their Ms
The Permittee shall conduct inspection, surveillance, and monitoring activities as described in its Division
approved pretreatment program in order to determine, independent of information supplied by Industrial Users,
compliance with applicable pretreatment standards. [15A NCAC 02H .0908(e); 40 CFR 403.8(f)(2)(v)] The
Permittee must:
a. Inspect all Significant Industrial Users (SIUs) at least once per calendar year;
b. Sample all Significant Industrial Users (SIUs) at least once per calendar year for all SIU permit -limited
parameters including flow except as allowed under 15A NCAC .0908(e); and
c. At least once per year, document an evaluation of any non -significant categorical Industrial User for
compliance with the requirements in 40 CFR 403.3(v)(2), and either continue or revoke the designation as non-
significant.
8. IU Self Monitoring and Reporting
The Permittee shall require all Industrial Users to comply with the applicable monitoring and reporting
requirements outlined in the Division -approved pretreatment program, the industry's pretreatment permit, or in 15A
NCAC 02H .0908. [15A NCAC 02H .0906(b)(5) and .0905; 40 CFR 403.8(f)(1)(v) and (2)(iii); 40 CFR
122.44(j)(2) and 40 CFR 403.12]
9. Enforcement Response Plan (ERP)
The Permittee shall enforce and obtain appropriate remedies for violations of all pretreatment standards
promulgated pursuant to section 307(b) and (c) of the CWA (40 CFR 405 et. seq.), prohibitive discharge standards
as set forth in 40 CFR 403.5 and 15A NCAC 02H .0909, specific local limitations, and other pretreatment
requirements. All remedies, enforcement actions and other, shall be consistent with the Enforcement Response
Plan (ERP) approved by the Division. [15A NCAC 02H .0903(b)(7), .0906(b)(8) and .0905; 40 CFR 403.8(f)(5)]
10. Pretreatment Annual Reports (PAR)
The Permittee shall report to the Division in accordance with I5A NCAC 02H .0908. In lieu of submitting annual
reports, Modified Pretreatment Programs developed under 15A NCAC 02H .0904 (b) may be required to submit a
partial annual report or to meet with Division personnel periodically to discuss enforcement.of pretreatment
requirements and other pretreatment implementation issues.
For all other active pretreatment programs, the Permittee shall submit two copies of a Pretreatment Annual Report
(PAR) describing its pretreatment activities over the previous calendar year to the Division at the following
address:
Version 11/09/2011.2

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES Permit Standard Conditi nis "
Page 18 of 18
• NC DEQ / Division of -Water Resources / _Water Quality Fermitting.Section
Pretreatment, Emergency Response, and Collection Systems (PERCS) Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
These reports shall be submitted by March 1 of each year and shall contain the following:
a. Narrative
A narrative summary detailing actions taken, or proposed, by the Permittee to correct significant non-
compliance and to ensure compliance with pretreatment requirements;
b. Pretreatment Program Summary (PPS)
A pretreatment program summary (PPS) on forms or in a format provided by the Division;
c. Significant Non -Compliance Report (SNCR)
A list of Industrial Users (lUs) in significant noncompliance (SNC) with pretreatment requirements, and the
nature of the violations on forms or in a format provided by the Division;
d. Industrial Data Summary Forms (IDSF)
Monitoring data from samples collected by both the POTW and the Significant Industrial Users (SIUs). These
analytical results must be reported on Industrial Data Summary Forms (IDSF) or on other forms or in a format
provided by the Division;
e. Other Information
Copies of the POTW's allocation table, new or modified enforcement compliance schedules, public notice of
lUs in SNC, a summary of data or other information related to significant noncompliance determinations for
lUs that are not considered SIUs, and any other information, upon request, which in the opinion of the Director
is needed to determine compliance with the pretreatment implementation requirements of this permit;
11. Public Notice
The Permittee shall publish annually a list of Industrial Users (Ills) that were in significant noncompliance (SNC)
as defined in the Permittee's Division -approved Sewer Use Ordinance with applicable pretreatment requirements
and standards during the previous twelve month period. This list shall_ be published within four months of the
applicable twelve-month period. [15A NCAC 02H .0903(b)(34), .0908(b)(5) and .0905 and 40 CFR
403.8(f)(2)(viii)]-
12. Record Keeping
The Permittee shall retain for a minimum of three years records of monitoring activities and results, along with
support information including general records, water quality records, and records of industrial impact on the
POTW and shall retain all other Pretreatment Program records as required by 15A NCAC 02H .0908(f). [15A
NCAC 02H .0908(f); 40 CFR 403.12(o)]
13. Pretreatment Program Resources
The Permittee shall maintain adequate funding and qualified personnel to accomplish the objectives of its approved
pretreatment program. and retain a written description of those current levels of inspection. [15A NCAC 02H
.0906(b)(9) and (10) and .0905; 40 CFR 403.8(0(3), 403.9(b)(3)]
14. Modification to Pretreatment Programs
Modifications to the approved pretreatment program including but not limited to local limits modifications, POTW
monitoring of their Significant Industrial Users (SIUs), and Monitoring Plan modifications, shall be considered a
permit modification and shall be governed by 40 CFR 403.18, 15 NCAC 02H .0114 and 15A NCAC 02H .0907.
Version 11/09/2011.2

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Diamond Head WWTF
AugAug-18
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If so, you can change the color to represent the months for your analysis.
You may change your original to suit your needs.
Apr 1 to Oct 31
Nov 1 to Mar 31

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2
FACILITY NAME: Diamond Head WWTP CLASS: WW-2
OWNER NAME: Aqua North Carolina inc ORC: Dana A Bixby_
GRADE: WW-3. ORC HAS CHANGED: No
eDMR PERIOD: 08-2618 (August2018) VERSION: 1.0
PERMIT STATUS: Active
COUNTY: Iredell
ORC CERT NUMBER: 27149
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
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No Reporting Reason: ENFRUSE No 1110w.ReuselReeycle; ENVWTHR-NoVisitation -Adverse Weather; NOFLOW=No Flow; HOLIDAY= No Visitation-Hohday

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2 PERMIT STATUS: Active
FACILITY NAME: Diamond Head WWTP CLASS: WW-2 COUNTY: Iredell
OWNER NAME; Aqua North Carolina Inc ORC: DanaA Bixby ORC CERT NUMBER: 27149
GRADE: W W-3. ORC HAS CHANGED: No
eDMR PERIOD: 09-2018 (September 2018) VERSION: 1.0
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
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4** No Reporting Reason: ENFRUSE = No Flow-Reuse/Recycle; ENVWTHR=NoVisitation — Adverse Weather, NOFLOW=NoFlow; HOLIDAY =NoVisitation —Holiday

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2 PERMIT STATUS: Active
FACILITY NAME: Diamond Head WWTP CLASS: WW-2 COUNTY: Iredell
OWNER NAME: Aqua North Carotins inc. ORC: Dana A Bixby ORC CERT NUMBER: 27149
GRADE: WW-3. ORC HAS CHANGED: No
eDMR PERIOD: 10-2018 (October 2018) VERSION: 1.0
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
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DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2
FACILITY NAME: Diamond Head WWTP CLASS: WW-2
OWNER NAME: Aqua North Carolina Inc ORC: Dana A Bixby
GRADE: WW-3. ORC HAS CHANGED: No
eDM R PERIOD: 11-2018 (November 2018) VERSION: 1.0
PERMIT STATUS: Active
COUNTY: Iredell
ORC CERT NUMBER: 27149
STATUS: Processed
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••••NoRepotting Reason. ENFRUSE—NoFlow-Reuse/Recyele; ENVWTHR= No Visitation— Adverse Weather; NOFLOW = No Flow; HOLIDAY No Visitation — Holiday

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2
FACILITY NAME: Diamond Head WWTP CLASS: WW-2
OWNER NAME: Aqua North Caroline Inc ORC: Dana A Bixby
GRADE: WW-3. ORC HAS CHANGED: No
eDMR PERIOD: 12-2018 (December 2018) VERSION: 1.0
PERMIT STATUS: Active
COUNTY: lredell
ORC CERT NUMBER: 27149
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
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• 86 No Reporting Reason: ENFRUSE =No Flow-Reuse/Recycle; ENVWTHR=No Visitation— Adverse Weather; NOFLOW = No Flow; HOLIDAY =No Visitation— Holiday

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDESPERMIT NO.: NC0074772 PERMIT VERSION: 4,2 PERMIT STATUS: Active
FACILITY NAME: Diamond Head WWTP CLASS: WW-2 COUNTY: Iredell
OWNER NAME: Aqua North Carolina Inc ORC: Dana A Bixby ORC CERT NUMBER: 27149
GRADE: WW-3. ORC HAS CHANGED: No
eDMR PERIOD: 01-2019 (January 2019) VERSION: 1 0
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
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DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2
FACILITY NAME: Diamond Head WWTP CLASS: WW-2
OWNER NAME: Aqua North Carolina Inc ORC: DanaA Bixby
GRADE: WW-3. ORC HAS CHANGED: No
eDMR PERIOD: 02-2019 (February 2019) VERSION: 1.0
PERMIT STATUS: Active
COUNTY: Iredell
ORC CERT NUMBER: 27149
STATUS: Processed
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•••`NoReporting Reason: ENFRUSE-No Flow-Reuse/Recycle, ENVWTHR-No Visitation- Adverse Weather, NOFLOW=No Flow; HOLIDAY= No Visitation -Holiday

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2
FACILITYNAIVIE: Diamond Head WWTP CLASS: WW-2
OWNER NAME: Aqua North Carolina Inc ORC: Dana A Bixby
GRADE: WW-3. ORC HAS CHANGED: No
eDMR PERIOD: 03-2019 (March 2019) VERSION: 1.0
PERMIT STATUS: Active
COUNTY: Iredell
ORC CERT NUMBER: 27149
STATUS: Processed
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*'"'NoReporting Reason; ENFRUSE=NoFlow-Reuse/Recycle, ENVWTHR=NoVisitation Adverse Weather; NOFLOW = No Flow; HOLIDAY No Visithflon -. Holiday

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4,2 PERMIT STATUS: Active
FACILITY NAME: Diamond Head WWI'P CLASS: WW-2 COUNTY: Iredell
OWNER NAME: Aqua North Carolina Inc ORC: Dann A Dixty ORC CERT NUMBER: 27149
GRADE: WW-3. ORC HAS CHANGED: No
eDMR PERIOD: 04-2019 (Api'!l 2019) VERSION: 1.0
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
6
A
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00400
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C0310
C0610
c0028
31611
00310
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Weekly
2 X week
Weekly
Weekly
Weekly
-
Weekly
Weekly
Recorder
Glob
Grab
Chub
Composite
Composite
Comp�Be
G mb
018b
PLOW
TEMRC
pH
CHLORINE
DOD -Cone
101341-Cone
TES -Cows
FCOLI DR
DO
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110
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Hit
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1130
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003122
1032
24800
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002852
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7.11
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3.2
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9
4
24800
0.5
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0,03001
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-
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0,04187
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24
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002846
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7
24
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003518
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24800
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0.04098
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2
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004939
10
1310
800
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004029
10
74
<20
9.4
74
BOO
0.75
Y
003476
<20
26
<02
62
<1
24
25
Y
0,04137
2A
N
004535
24
N
0.04396
24
1205
0.5
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0 03588
26
24
800
2
Y
003537
17
1030
24
800 '
2,5
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003912
18
73
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5
300
11,3
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_
24
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125
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00356
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-
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800
2
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002883
m
24
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0 03855
21
24
N
003095
21
24
800
3
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002787
33
24
1245
05
B
003111
24
1030
24
800
0.75
Y
002991
19
75
<T0 -. ... - .
<2 -
<02
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<3 -
9
73
24
800
2,75
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003666
<20
26
7A
1236
I
Y
0,03474
-
-
-
27
24
N
003046
IB
24
N
0.03224
29
24
1412
2,48
Y
003142
30
24
1129
0 35
Y
0 035
Moolkly Arcrair GmR:
p8731
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4
31
100
Mo'myArrr.Scr
0035142
17
0
2,45
0
4
4.161791.
075
Nay Masham
004939
19
7,8
0
4
0
62
300 -
113
Dolly Mbin.m.
0,02787
13
73
0 -
0
V
0
0
9
••••NoReporting Reason. ENFRUSE-NoFlow-Reuse/Recycle; ENVWTHR-NuVisilalirm- Adverse Weather; NOFLOW = No Flow; HOLIDAY=No Visitation -Holiday

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2
FACILITY NAME: Diamond Head WWTP CLASS: WW-2
OWNER NAME: Ayua NuoU Carolina Inc ORC: Dana A Bixby
GRADE: WW-3 ORC HAS CI-IANGED: No
eDMR PERIOD: 05-2019 (May 2019) VERSION: 1 0
PERMIT STATUS: Active
COUNTY: lredell
ORC CERT NUMBER: 27149
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
1a
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A
1
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9
H
E
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D
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00030
00610
20400
50060
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C0619
C0534
31616
00100
Conhnuous
Weekly
Weekly
2X week
Weekly
Weekly
Weekly
Weokty
Week19
Recorder
Grob
Grab
Grab
Composde
CBmposne
Composite
Grab
Grob
FLOW
TEMP-C
PH
CHLORWE
BOO -Cone
N111N-Cone
T55-Cone
FCOLI BR
DO
2489 dock
Hn
2400 clock
Hn
Y/WN
mad
dee c
su
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mp/I
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1030
24
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0.5
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003009
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73
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<02
3.7
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9.5
2
24
800
2 5
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0.035
25
3
24
B00
1
Y
0033D3
4
24
N
0 03230
5
24
N
0.04127
6
24
800
4 25
Y
0,03821
7
24
BOO
2
Y
0,03475
a
1030
24
800
3
Y
0.03409
23
7.5
<20
11
<02
15
<1
8,2
9
7A
600
1.5
Y
0.03189
<20
IB
24
800
15
Y
0,036
11
24
N
0.042
12
24
N
0.035
13
24
930
1
Y
0_03209
14
24
000
25
Y
003606
15
1030
24
BOO
1.5
Y
0.03564
20
7.1
<20
<2
<02
< 2 5
<1
9,6
16
24
800
15
Y
0,03446
<20
17
24
1143
05
11
003516
19
24
N
003985
19
24
N
0.03999
t
20
24
800
13
Y
0 03795
11
24
800
33
Y
0 02946
12
1030
24,
000
25
Y
0.03585
24
74
<20
2,1
<02
43
<1
84
33
24
800
35
Y
003854
31
24
24
1300
2.5
Y
0.03939
25
24
N 1
0 03716
26
24
N
0.04284
27
24
N
0_04052
H
26
24
800
1,75
Y
003148
26
1030
24
600
1.75
Y
003771
26
73
26
<2
<0-2
41
<1
8,2
30
24
B55
15
Y
0,03384
<20
31
24
800
Y
0.03702
Meblby Avenge Gm! h
BA731
15
4
30
200
Marry Amour.
0.036089
228
B2
262
0
542
1
878
Ddy Ma+lmem
0 04284
26
7.5
31
11
0
15
0
9,6
Doll Mbanione
0112944
20
7,1
0
0
0
0
0
62
"0 No Reporting Reason: ENFRUSE = No Flow-Reuse/Recycie; ENV WTHR= NO Visitation - Adverse Weather, NOFLOW = No Flow; HOLIDAY =No Visitation -. Holiday

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2 PERMIT STATUS: Active
FACILITY NAME: Diamond Head WWTP CLASS: WW-2 COUNTY: Iredell
OWNER NAME: Aqua North Carolina Inc ORC: Dana A Bixby ORC CERT NUMBER: 27149
GRADE: WW-3 ORC HAS CHANGED: No
cDMR PERIOD: 06-2019 (June 2019) VERSION: 1.0
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
Y
S
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601411
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Weekly
Compmile
Weekly
Composite
Weeky
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Weekly
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(ir.b
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0.03263
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00371
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24
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003064
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48
73
6
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0 03497
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B00
4
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0 05037
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24
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0.04008
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24
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0.04552
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24
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0 03626
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900
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0,0291E
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003599
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13
24
845
1,25
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0.03455
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14
24
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0.02832
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0,03171
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0.03241
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0,03881
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0.04634
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74
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8,8
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0.03472
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24
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0,03316
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0.03574
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0,03452
24
24
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1
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0,04035
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24
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0.03601
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-
26
1030
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800
3.25
Y
0.03528
26
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88
27
24
800
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0 0326E
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900
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0 03531
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0.03805
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2725
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220
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0.02102
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72
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, 0
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0
0
7,3
•4.4NoReporting Reason: ENFRUSE=No Flow-Reuse/Recycle; ENVWTHR=No Visitation — Adverse Weather, NOFLOW = No Flow; HOLIDAY= NoVisitation— Holiday

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
NPDES PERMIT NO.: NC0074772 PERMIT VERSION: 4.2
FACILITY NAME: Diamond Head WWTP CLASS: WW-2
OWNER NAME: Aqua North Carolina Inc ORC: Dana A 13ixby
GRADE: W W-3. ORC HAS CHANGED: No
eDMYR PERIOD: 07-2019 (July 2019) VERSION: 1 0
PERMIT STATUS: Active
COUNTY: Iredell
ORC CERT NUMBER: 27149
STATUS: Processed
SAMPLING LOCATION: E1 LUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
a
0`
8
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Gab
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0,04121
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24
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0,03993
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24
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0.04214
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24
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003314
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11
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0 03955
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12
24
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0:0413
13
24
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0,03811
14
24
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0,03847
15
24
1145
0.5
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0.03826
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16
17
1030
24
74
1020
1315
05
05
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0 03639
0 03978
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84
27
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18
24
1135
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0 03469
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29
940
0 75
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004118
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24
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0,04072
21
24
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0.03098
22
24
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0.03923
23
24
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1.5
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0 04369
24
25
1030
24
24
800
800
1.75
Y
Y
0 03445
0 03949
26
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<20
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4,8
26
24
800
Y
0 03579
27
24
N
0,03595
28
24
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0,03515
29
24
800
35
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0 03823
30
24
901
Y
0 03439
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1030
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96.t2¢Alcrliskh
0.03911
turns
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0,038165
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0.96
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"a"" No Repotting Reason: ENFRUSE = No Flow-Reusr/Recycle: ENVIVTf{R = No Visitation — Adverse Weaker; NOFLOW= No Flow; HOLIDAY—. No Visitation —
DdyMawnnm.
Daly Ml
0 04378
0,03098
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26
84
6.9
33
0
0
0
0
0
31616
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Weekl
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Grab
FCOLI BR
DO
#/100m1
mg/1
10.7
134
<1
7.3
320
7,9
8
88
<1 11.7
lig
12,795844
928
320
11.7
0
7,3

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Customers by District (Active & Inactive) August 2019 All Aqua Meters and Inactive Systems have been removed from this list
• 3I Ct rv`cs v
Includes Contract Sewer Customer MOVE N662 TO N538
Water Sewer Water Water Water Sewer Sewer Sewer
District System Name County PWS ID# Rate Entity AU AU Residential Commercial Availability Water Total Residential Commercial Availability Sewer Total
N169 WATERMARK Iredell NC0149182 ANC 8010 8810 14 14 12 12
N193 DIAMOND HEAD Iredell NC0149182 ANC 8010 8810 40 4 44 39 3 v 42
N213 CATALINA/ALCOVE BUSINESS Iredell NC0149182 ANC 8010 8810 5 5 3 3
N234 MONTEREY LANDING Iredell NC0149177 ANC 8010 8810 65 3 68 65 11 66
N753 WILLIAMSON RD BUSINESS PK , Iredell NC0149182 ANC 8010 8810 1 1 1/ 1
N797 MALIBU POINTE Iredell NC0149177 ANC 8010 8810 31 31 32 .---"32
'LJ
/
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DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
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DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Outfall 001
Lat 35° 33' 52"
Long 8O°51'58"
(lake discharge)
AQUA North Carolina
Diamond Head Subdivision WWTP
Receiving Stream:
Stream Segment:
State Grid/Quad:
Sub -Basin:
Lake Norman [Reeds Creek Branch]
11-(75) Stream Class: WS-IV; B; CA
EI5SE / Mooresville, NC River Basin: Catawba River
03-08-32 HUC: 03050101
North
NPDES Permit NC0074772
Iredell County

DocuSign Envelope ID: D924D043-3AC1-451D-8704-D92E1E99D027
Latitude: 35°31'15"
Longitude: 80°52'13"
Quad # E15SE
Receiving Stream: Lake Norman
Stream Class: WS-IV & B CA
Subbasin: 30832
NC0056154
Aqua North Carolina, Inc.
Bridgeport Subdivision
North
SCALE 1 :24000