NC0085359_Speculative Limits_20100901

NPDES DOCIMENT SCANNING COVER SHEET
NPDES Permit:
NC0085839
Twelve Mile Creek WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Instream Assessment (67b)
Speculative Limits **
Environmental Assessment (EA)
Document Date:
September 1, 2010
This document is printed an muse paper. - ignore any
content on the reirerse side

ti
Y
14
Beverly Eaves Perdue
Governor
NCbENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen H. Sullins
Director
Mr. Edward Goscicki, P.E.
Director, Union County Public Works
500 North Main St. Suite 500
Monroe, North Carolina 28112
September 1, 2010
Dee Freeman
Secretary
Subject: Speculative Effluent Limits- 9/12/15 MGD
Union County - Twelve Mile Creek WWTP
Permit No. NC0085359 .
Union County
Dear Mr. Goscicki:
This letter provides speculative effluent limits. for 9, 12, and 15 MGD at the Twelve Mile Creek WWTP
(currently permitted at 6 MGD). The Division received the speculative limits request in a letter dated June 16,
2010 from James Struve, P.E., of Hazen and Sawyer. The Division also received supplemental information to
assist in the speculative limits evaluation, including: a) Scoping Level Assessment of Assimilative Capacity in
Twelve Mile Creek below the Union County WWTP (Tetra Tech, April 2010); b) QUAL2E stream water quality
model code (received July 7, 2010); c) Expansion Alternatives Development Study (Hazen and Sawyer),
received on August 17, 2010; and d) Union County Summer 2009 Stream Reconnaissance of dissolved oxygen.
Receiving Stream.
Twelve Mile Creek is formed downstream of the convergence of West Fork Twelve Mile Creek and East Fork
Twelve Mile Creek and has a stream classification of C. Waters with this classification have a best usage for
aquatic life propagation and maintenance of biological integrity, wildlife, secondary recreation and agriculture.
Stream flow information was updated in 2002 by the United States Geological Survey (USGS) for a nearby
gaging station at Highway 16 just 2500 ft upstream of the Twelve Mile Creek WWTP discharge point. This
discharge point has a drainage area of 76.8 square miles and stream flow estimates of 72.7 cfs (annual average
flow), 0.1 cfs (summer 7Q10 flow), and 1.5 cfs (winter 7Q10 flow). Previously, Twelve Mile Creek was
considered a zero flow stream with 7Q10 flow =0 and 30Q2>0.
The current discharge location on Twelve Mile Creek is approximately 2 miles upstream of the NC/SC state
line. Twelve Mile Creek from its source to the NC/SC state line is listed on both the Fina1 2008 and Draft 2010
NC 303(d) Impaired Waterbody listing for both copper and turbidity. The stream is not listed as impaired for
low dissolved oxygen (DO); however, historical data has shown low DO values both upstream and
downstream of the discharge point during low summer flow conditions. In Summer 2009, Union County
conducted a DO reconnaissance survey which indicated that low DO values were common above the Twelve
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service: 1.877-623-6748
Internet www.ncwaterquailtv.orq
NonrthCarolina
Naturally

\l
,
Mile Creek discharge in the mainstem and tributaries, indicating a background component to the low DO
values observed downstream of the discharge.
Speculative Limits.
Based on Division review of receiving stream conditions and water quality modeling results, speculative limits
are presented in Table 1 below. These speculative limits maintain the TP load limit originally allocated to
Union County/Twelve Mile to comply with the South Carolina TP lake standard of 0.06 mg/1. Likewise,
copper and zinc limits originally added to comply with South Carolina standards are maintained, and are
based on WER calculations. For listed parameters without limits, effluent monitoring will be required.
Monitoring within Twelve Mile Creek will also be required to ensure that the water quality model predictions
were accurate, and to ensure the discharge does not create more adverse conditions in the future.
TABLE 1. Speculative Limits for Twelve Mile Creek WWTP, Expanded Flows of 9/12/15 MGD
Effluent Characteristic
Flow
BOD5 (April - October)
Monthly Average
9/12/15 MGD
Effluent Limitations
Weekly:
Average
Daily Maximum
BOD5 (November - March)
NH3 as N (April - October)
NH3 as N (November - March)
Fecal coliform (geometric mean)
Dissolved Oxygen
TSS
TRC
Total copper
Total zinc
Turbidity
Total Phosphorus - Monthly Avg
Total Phosphorus- (Annual Avg)
Total Nitrogen
Chronic Toxicity Pass/Fail @
90% (Quarterly test)
5.0mg/ L
10.0 mg/L
1.0 mg/ L
2.0/1.9/1.9 mg/L
200/100 ml
30 mg/ L
12.9 ug/1
41.7 lbs/ day
(20.85 lbs/day)
7.5 mg/L
15.0 mg/ L
3.0 mg/ L
6.0/5.7/5.7
mg/L
400/100 ml
45 mg/ L
6.0 mg/L (minimum)
Note: At 9 MGD, TP mass limits equate to 0.56 mg/1 (Monthly avg) and 0.28 mg/I (Annual avg.)
Note: At 12 MGD, TP mass limits equate to 0.42 mg/I (Monthly avg) and 0.21 mg/I (Annual avg.)
Note: At 15 MGD, TP mass limits equate to 0.33 mg/1 (Monthly avg) and 0.17 mg/I(Annual avg.)
Issuance of these speculative limits allows Union County to proceed to SEPA submission for the proposed
expansion. If a FONSI is ultimately obtained for the SEPA submission, then Union County will need to apply
to the NPDES Unit for a permit modification for expanded flow. However, please note that these speculative
limits do not guarantee that an NPDES permit will be issued for the proposed expansion. Likewise,
speculative limits are provisional and may change with future changes in water quality standards, TMDLs,
policy, etc. Please note the following concerns and/or review requirements that Union County will need to
address:
17 ug/1
18.5 ug/1
171 ug/I
• QUAL2E Model Review. Division staff from the Modeling Unit reviewed the draft scoping level
assessment of Twelve Mile Creek and the modeling files in July 2010 (comments attached). The
QUAL2E scoping level model was developed to evaluate assimilative capacity downstream of the
WWTP. Staff review determined that the model as a scoping level assessment tool was created
based on limited data. The model must be validated with additional data collection and results

evaluated byDWQ to provide confidence accepting the model results. Data should be collected
duringsummer conditions (low flow, high temperature) at three DO sag points predicted byise
10 miles, and 12.5 miles below the discharge. There
model: at downstream sites about 2 miles,
particular concern about the second dissolved oxygen sag point that occurs 7-10 miles below the
g
dischar a in South Carolina, when DO decreases substantially below the standard ofhagg 1.
Model results indicate that the sag is not caused by the Twelve Mile Creek WWTP d;
however, the lack of data makes it difficult to confirm conditions in this segment of theeam.t must be
• State Environmental Policy Act (SEPA) Requirements. A SEPA EA/EIS document
lands; and
reared for all projects that: 1) need a permit; 2) use public money or affectpublic3)
prepared For existing discharges,
might have a potential to significantly impact the environment.
significant impact is defined as an expansion of > 500,000 gpd additional flow. Since
Union
is ro osin a discharge of >500,000 gpd flow, a SEPA document that evalua
tes the
County p p g
potential for impacting the quality of the environment is required. A SEPA document should
contain a clear justification for the proposed project. If the SEPA Environmental Assessment (EA)
demonstrates that the project may result in a significant adverse effect on the quality the
Since
of
be
environment, then a SEPA EIS (Environmental Impact Statement) must SEPA
Pprepared.
nt all thisths
expanded discharge is subject to SEPA, you must also fold into the
requirements specified in the NPDES Engineering Alternatives Analysis (EAA) Guidance
attached). The EAA must justify requested flows, and provide a detailed analysis ofpotential
are
wastewater treatment alternatives. The SEPA process will be delayed if all EAA requirements
not adequately addressed. Please note that the Expansion Alternatives Development Study
previously submitted to DWQ will need to be expanded to include flow justification and
d
alternatives analyses/cost comparisons for a full 15 MGD expansion. If you avea y Branch questions
stiat
regarding SEPA requirements, please contact Hannah Stallings with the DWQ g
[phone].
• NPDES Permit Modification Requirements.The NPDES Unit will not accept an NPDES perit
modification request for expanded flow until the Division has approved the SEPA document and s
a Finding of No Significant Impact (FONSI) to the State Clearinghouse for review and comment. In
accordance with the North Carolina General Statutes, the practicable wastewater treatment and
disposal alternative with the least adverse impact on the environment is required to be implemented.
Any NPDES permit modification for expanded flow will be subject to 30-day public comment.
this is a Major permit, US EPA must approve any proposed permit changes and South Carolina
DHEC will have an opportunity to comment. Documentation will need to address any projected
impacts to NC/SC water quality.
Should you have any questions about these speculative limits or NPDES permitting requirements, please
feel free to contact Jackie Nowell at [phone] or Tom Belnick at [phone].
Respectful
014
m Belnick
Supervisor, Complex Permitting Unit
cc: Michael J. Montebello SCDHEC, 2600 Bull StreeteSColumbia SC 29201
PO Box 33726, Raleigh, NC 27636 Attn: Sara Myers
US Fish and Wildlife Service, Ecological Services,
NC WRC, Inland Fisheries, 1721 Mail Service Center, Raleigh, NC, 27699-1721 Attn: Fred Harris
Mooresville Regional Office/Surface Water Protection Section
Construction Grants and Loans
Kathy Stecker, Pam Behm/Modeling TMDL Unit
Hannah Stallings/Planning Section
Central Files
NPDES Permit File/ NC0085359

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,Belnick, Tom
Vrifiso
From: Behm, Pamela
Sent: Tuesday, August 31, 2010 11:57 AM
To: Belnick, Tom
Cc: Stecker, Kathy; Nowell, Jackie
Subject: RE: Union County- Draft Spec
Hi Tom,
I have only one suggestion, in the Qual2e model review section, change "Data should be collected at three DO sag
points..." to "Data should be collected during summer conditions (low flow, high temperature) at three DO sag points..."
From: Belnick, Tom
Sent: Friday, August 27, 2010 4:15 PM
To: Wakild, Chuck; Matthews, Matt; Poupart, Jeff; Stecker, Kathy; Behm, Pamela
Cc: Nowell, Jackie
Subject: Union County- Draft Spec
Jackie and I have completed the Draft Spec letter for Union County/12 Mile. Let us know if you have any comments by
COB Tuesday August 31. Thanks.
Tom Belnick
Supervisor, Complex NPDES Permitting Unit
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.

iike4 ON t spec Commeo
li
i'Rt►MoTF. I'KOTEcT 1'Nt)SPF.N
S h Carolina Departn• it of Health
and Envirunutcntal ('antral
MEMORANDUM
TO: Jeff DeBessonet, Director
Water Facilities Permitting Division
FROM: Heather B. Rizzuti, EHM I, and Larry Turner, EHM III
Water Quality Monitoring and Modeling Section
THROUGH: David Graves, Manager
Water Quality Monitoring and Modeling Section
RE: Proposed expansion of Twelve Mile Creek WWTP (NC0085359) discharge to
Twelve Mile Creek (WMU 0301, HUC 03050103-02) in Union County, NC
DATE: 7/23/2010
On 7/20/2010, Kathy Stecker of the NC Division of Water Quality (NCDWQ) at
NCDENR requested a response from the Bureau of Water concerning a proposed expansion of a
North Carolina wastewater facility that may impact South Carolina waters. Twelve Mile Creek
WWTP (NC0085359) is permitted to discharge 6 MGD of effluent to Twelve Mile Creek in
Union County, NC. The current effluent flow of this WWTP is approximately 3.4 MGD. Union
County is proposing an expansion to 15 MGD at the existing outfall location. Downstream of
the Union County discharge, Twelve Mile Creek flows into Lancaster County, SC, where it joins
the Catawba River (see attached map). According to modeling results presented by NCDWQ, a
dissolved oxygen (DO) sag occurs in a segment of Twelve Mile Creek in Lancaster County
called "Reach E" (see attached map). The upper end of Reach E is located where US Highway
Route 521 crosses Twelve Mile Creek. No ambient stream monitoring has been performed in
Reach E.
Kathy Stecker inquired whether there were any sources of oxygen demand in Reach E or
immediately upstream in SC. In response to her question, there are no permitted NPDES
wastewater facilities or SCDHEC permitted agricultural facilities in any part of the Twelve Mile
Creek watershed (HUC 03050103-02) that is within South Carolina. However, there are two
active NPDES industrial dischargers under the general permit for non-metal mining. They are
Robby Steen/Steen Mine (SCG730481) and Boral Bricks/Miller Mine (SCG730641). Their
outfalls are both located within the Sixmile Creek watershed (HUC 03050103-02-03), a tributary
that joins Twelve Mile Creek approximately 0.27 mi upstream of Reach E (see attached map).
The Robby Steen/Steen Mine is approximately 5.1 mi upstream of the beginning of Reach E, and
1 of 2

the Boral Bricks/Miller Mine discharge is approximately 3.1 mi upstream of the beginning of
Reach E.
In an effort to determine whether the proposed expansion to 15 MGD would impact
waters in SC, the Water Quality Monitoring & Modeling Section has several questions and/or
concerns.
1. Regarding the section of Twelve Mile Creek upstream of the Twelve Mile Creek WWTP
discharge, does the NCDWQ consider this stream segment to be naturally low in DO?
Are there any point sources or nonpoint sources of oxygen demand in the watershed
upstream of this location? Are there any other ambient monitoring stations in the
watershed farther upstream in North Carolina? If so, are any of these monitoring stations
listed on the NC 303(d) list or are covered by a TMDL?
2. Please send us the DO model for Twelve Mile Creek and all relevant files for running the
model. We are also interested in any extra information about the point sources, rates,
constants, flows, and slopes used in the model.
3. In her email to Michael Montebello, Kathy Stecker mentioned that she will be
recommending additional monitoring this summer, including in Reach E where the DO
sag occurs in all of the modeling scenarios. We agree that additional ambient monitoring
is needed to calibrate the model. We recommend as many additional sampling locations
in Reach E as would be necessary to provide sufficient sampling information to
adequately characterize the DO conditions, BOD5, and ammonia -nitrogen in Reach E.
This sampling data should then be used to calibrate the model to the existing conditions
in Reach E. In addition to these new sampling location(s), sampling should also take
place at all of the stations that underwent daily sampling in 2007.
We anticipate that the above information will allow us to adequately address questions
concerning the existing and expanded discharge. However, if the additional work does not
adequately address concerns and support a conclusion that low DO conditions in Twelve Mile
Creek are attributable to natural conditions, then additional work may be needed. This may
include additional sampling in Twelve Mile Creek or an assessment in a similar but unimpacted
stream.
2 of 2

8elnick, Tom
From: Heather B Rizzuti [[e-mail]]
Sent: ■ • - Jul 26, 2010 11:01 AM
To:
Cc: l avi• r- Turner
Subject: Memo: Proposed expansion of Twelve Mile Creek WWTP (NC0085359) in Union County,
NC; discharge to Twelve Mile Creek
Attachments• Memo_UnionCoNC_12MiCrkExpansion_JuIy2010.doc;
TwelveMileCreek_UnionCoNCExpansion_July10.pdf
J
I have attached the memo referenced above and the accompanying map. I will get you a hard copy of both within the
next half hour. Please let me know if you have any questions.
Heather Bartley Rizzuti, M.S.
Environmental Health Manager
Bureau of Water
Water Quality Monitoring & Modeling Section
[phone]
rizzuthb@ dhec.sc.gov
1

112
Legend
usgs-all
O partstat
NPDES
1:100K Hydrography
1:24K Catawba Basin
schuc_12
Navigable Lakes
Navigable Streams
Agriculture Facilities/Fields
STRUCTURE
■ BLDG
fl BURIAL
MUA
•SC0028622
o SC0027189
RS-06176 •
SQP041904
0 0.5 1 2 Miles
l l l l l l l l
3CG730496CW-176
0
SCG73064C-0800
„C) ';:�W ND0867989
CW-041). '1 •
SG730994 x .
' ‘SC0032417 0
QQ l j
- - 5G0001015�
";.i
CW-227 0_ SC0001015
o �
--Catawba River
• RS-03511\
\\
30501U3G6U3
O\N-145
a^}SCG730281
'o
0 •
Twelve Mile Creek Modeling Area
HBR 7/23/10
Six Mile Creek
SC0027383
/7- -
�i cw-18,5-r

REASONABLE POTENTIAL ANALYSIS
Twelve Mile Creek WWTP
NC0085359
7Q10W (cfs) 1.5
30Q2 (cis) 3.2
Avg. Stream Flow, QA (cfs) 72.7
Reeving Stream Twelve Mile Creek
WWTP Class IV
IWC (%) @ 7Q10S 99.572
@ 7Q1OW 93.939
@ 3002 87.902
@ QA 24.231
Stream Class C
Outfall 001
Qw=15MGD
PARAMETER
TYPE
(1)
STANDARDS &
CRITERIA (2)
PQL
Units
REASONABLE
POTENTIAL RESULTS
RECOMMENDED ACTION
NC WQS/
Chronic
'A FAY/
Acute
n
# Det. Max Pred Cw Allowable Cw
Copper
NC
12.86
AL
18.5
ug/L
141
116
13.7
Acute:
_ _ _
Chronic:
18.5
_ _ _
12.9--------------------------------
Zinc
NC
171
AL
170.6
ug/L
161
161
135.6
Acute:
_ _ _-_
Chronic:
170.6
___-_-_-_-_-_-_-___-_-_-___-___-_
171.3
* Legend:
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
Freshwater Discharge
12-mi Creek rpa 2009031.xlsx, rpa
8/27/2010

REASONABLE POTENTIAL ANALYSIS
Twelve Mile Creek WWTP
NC0085359
Time Period 0
Qw (MGD) 9
7Q10S (cfs) 0.1
7Q10W (cfs) 1.5
30Q2 (cfs) 3.2
Avg. Stream Flow, QA (cfs) 72.7
Rec'ving Stream Twelve Mile Creek
WWTP Class IV
!WC (%) @ 7Q1OS 99.288
@ 7Q10W 90.291
@ 30Q2 81.341
@ QA 16.099
Stream Class C
Outfall 001
Qw = 9 MGD
PARAMETER
TYPE
(1)
STANDARDS &
CRITERIA (2)
PQL
Units
REASONABLE POTENTIAL RESULTS
• RECOMMENDED ACTION
NC WQS!
Chronk
% FAV I
Acute
n
# Dot Max Pred Cw
Allowable Cw
Copper
NC
12.86
AL
18.5
uglL
141
116
13.7
Acute:
Chronic:
18.5
13.0
Zinc
NC
171
AL
170.6
ug/L
161
161
135.6
Acute:
_ _
I hronic:
C
170.6
_ _ —.
171.8
------
------------------------
Legend:
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
Freshwater Discharge
12-mi Creek rpa 2009031.xlsx, rpa
8/27/2010

REASONABLE POTENTIAL ANALYSIS
Twelve Mile Creek WWTP
NC0085359
Timepeepd 0
Qw (MGD)
s) 0.1
7Q1OW (cfs) 1.5
30Q2 (cfs) 3.2
Avg. Stream Flow, QA (cfs) 72.7
Rec'ving Stream Twelve Mile Creek
WWTP Class IV
IWC (%) @ 7Q1OS 99.465
@ 7QIOW 92.537
@ 30Q2 85.321
@ QA 20.372
Stream Class C
Outfall 001
Qw=12MGD
PARAMETER
TYPE
(1)
STANDARDS &
CRITERIA (2)
PQL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NCWQS/
Chronic
Y,FAV/
Acute
n
# Det. Max PredCw ANowableCw
Copper
NC
12.86
AL
18.5
ug/L
141
116
Acute:
13.7 _ _ _
Chronic:
18.5
_ _ —.
12.9
---
---------------------------
Zinc
NC
171
AL
170.6
ug/L
161
161
135.E
Acute:
__
Chronic:
170.6
_ �
—--------------------------
171.5
— ---
'Legend:
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
Freshwater Discharge
12-mi Creek rpa 2009031.xlsx, rpa
8/27/2010

1)ithur9 (4) - / Z kl r (.J Lv
Residual Chlorine
7010 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (1
IWC (%)
Allowable Concentration (ugi
Fecal Limit
Ratio of 0.0 :1
Ammonia as NH3
(summer)
0.1 7010 (CFS)
15 DESIGN FLOW (MGD)
23.25 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL
99.57 IWC (%)
17.07 Allowable Concentration (m
Ammonia as NH3
(winter)
7Q10 (CFS)
200/100mI DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL
IWC (%)
Allowable Concentration (m
0.1
15
23.25
1.0
0.22
99.57
1.00
1.5
15
23.25
1.8
0.22
93.94
1.90
NC0025542
8/24/2010

Oil)/& 4 C4) / Z'41, (--)u'
Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (l
IWC (%)
Allowable Concentration (ugi
Fecal Limit
Ratio of 0.0 :1
Ammonia as NH3
(summer)
0.1 7010 (CFS)
12 DESIGN FLOW (MGD)
18.6 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL
99.47 IWC (%)
17.09 Allowable Concentration (m
Ammonia as NH3
(winter)
7Q10 (CFS)
200/100m1 DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL
IWC (%)
Allowable Concentration (m
0.1
12
18.6
1.0
0.22
99.47
1.00
1.5
12
18.6
1.8
0.22
92.54
1.93
NC0025542
8/24/2010

Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (I
IWC (%)
Allowable Concentration (ugd
Fecal Limit
Ratio of 0.0 :1
Ammonia as NH3
(summer)
0.1 7Q10 (CFS)
9 DESIGN FLOW (MGD)
13.95 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL
99.29 IWC (%)
17.12 Allowable Concentration (m
Ammonia as NH3
(winter)
7Q10 (CFS)
200/100mI DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL
IWC (%)
Allowable Concentration (m
0.1
9
13.95
1.0
0.22
99.29
1.01
1.5
9
13.95
1.8
0.22
90.29
1.97
NC0025542
8/24/2010

wed 0/20 to
Be!nick, Tom
104- Celin / 7,141
Subject:
Location:
Start:
End:
Recurrence:
Meeting Status:
Organizer:
Required Attendees:
Union County/12 Mile
9th floor file room
Wed 8/18/2010 10:00 AM
Wed 8/18/2010 11:00 AM
(none)
Meeting organizer
Belnick, Tom
Poupart, Jeff; Nowell, Jackie; Behm, Pamela; Stecker, Kathy
relgo )044,
Determine next step for Union County/12 Mile Creek
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1

INTEROFFICE MEMORANDUM
TO: Tom Belnick, Complex Permitting Unit
FROM: Pam Behm, Modeling & TMDL Unit
Spec SEPA
SUBJECT: MTU Comments on Union County Request for Speculative Limits to Expand Discharge into
Twelve Mile Creek
DATE: 7/30/2010
CC: Jackie Nowell, Alan Clark, Kathy Stecker, Dianne Reid, Melanie Williams
The following provides a summary of the Modeling and TMDL Unit's (MTU) evaluation of the report
titled "Draft Scoping Level Assessment of Assimilative Capacity in Twelve Mile Creek Below the Union
County WWTP," prepared by Tetra Tech, April 2010 and associated modeling files. DWQ received the
modeling files from Tetra Tech on July 7, 2010.
1. The QUAL2E scoping level model was developed by Tetra Tech to evaluate assimilative capacity
in Twelve Mile Creek and assess the impact of expanding Union County WWTP to 15 MGD. Note
that DWQ did not have input on the modeling plan.
This model was created as a scoping level assessment tool based on limited data. If speculative
limits are issued, the model should be validated through additional data collection and results_._
evaluated by DWQ before final permit limits are issued to provide confidence accepting the
model results. Data collection should begin as soon as possible to capture worst case conditions
through the summer months and should include multiple sampling events. Data should be
collected at the sites of the scoping level calibration points as well as through the reaches of the
three DO sag points predicted by the model (located 2 miles, about 10 miles, and about 12.5
miles downstream of the discharge, as shown in the figure below). Data collection efforts
should also include measurement of BOD-5 at upstream and Six Mile Creek sites to confirm
model estimates.
Of particular concern is the second sag point 7-10 miles downstream of the discharge when DO
dramatically decreases to well below the standard ("Reach E" on Figure 5 of the model report,
included below). Slope approximations were estimated from 10-meter LIDAR contour data
measured along the top of the bank for the entire length of the channel. The slope through this
area is very low relative to the rest of the system. The model results indicate that this sag is not
caused by the discharge, but there is no data available to confirm conditions through this area.
Data collection through this area will provide additional confidence accepting model predictions.

2. Summary of scoping level QUAL2E model predictions (keeping in mind the uncertainty involved,
as discussed above):
a. The model indicates that the increase in discharge does not worsen existing conditions, see
the figure included below.
b. As requested by NPDES, MTU ran the model with an effluent DO concentration of 9.0 mg/L.
The model indicates that increasing effluent DO to 9 mg/L from 6 mg/L does not improve
downstream DO.
c. The future expansion to 15 MGD scenario was run with effluent concentrations of 6.0 mg/L
for DO, 1.0 mg/L for ammonia, and 5.0 mg/L for BOD-5.
Union
County WWTP impact on DO in Twelve Mile Creek
----- No Discharge
DO at 6 mg/L
Actual (3.4 MGD)
MGD) DO at 9 mg/L
Existing
- -- - Fut(15
Fut (15 MGD),
9
"
8
I
6
I
O 4
0
3
..
2
1
1
0
t
WWTP
Discharge
2 t
i Distance
'
4
Downstream
6 8
from Discharge
10
(in
12
miles)
14
SIC
C

M
I \
Catav?ba
River
Twelve AAb Gene W aWSaeo
0 025 0.5
Legend
X-Section Locations
Model Reach IDs
��• C
D
E
-F
-G
NC_boundary
County Boundary
Six Mile Creek Subwatershed
Twelve Mile WWTP Subwatershed
Twelve Mile Watershed
1.5 2
Miles
Figure 5. Location of Channel Cross Section Measurements on Twelve Mile Creek.
From: Scoping Level Assessment of Assimilative Capacity in Twelve Mile Creek Below the Union County
WWTP. Tetra Tech, April 2010. Draft.

Belnick, Tom
From: Wakild, Chuck
Sent: Thursday, August 12, 2010 3:00 PM
To: Belnick, Tom; Matthews, Matt; Poupart, Jeff
Subject: FW: Union County/Trotter Summary
Attachments: UCPW TO CHAR.MECK.pdf; UCPW TO 12 MILE WWTP-001.pdf; UCPW TO crooked creek
wwtp.pdf; FAIRFIELD PLANTATION permit.pdf
fyi
From: Hood, Donna
Sent: Thursday, August 12, 2010 2:43 PM
To: Wakild, Chuck
Cc: Krebs, Rob
Subject: RE: Union County
Hi Mr. Wakild,
Per your request, I have attached the latest flow tracking/acceptance letters the MRO has. They are included in the
sewer extension permit applications. The most recent ones were issued the summer of 2009. I also included a copy of
the current permit Iirnits page. Per Don Laton's guidance and Tom Belnick's letter, this permit became effective on July
1, 2010. Had this permit been in effect prior the facility would have been out of compliance with the following
parameters:
1. Total residual chlorine -there is no dechlorination at the facility because there was no chlorine limit under the old
permit
2. Ammonia -monthly average
3. Flow
Permit non compliance:
Operation and Maintenance :
The following are inoperable...
• both clarifiers,
• tertiary filters,
• bar screen,
• cat walks,
• aeration header pipes
• blowers,
• influent pumps (only one)
WWTP exterior wall structural integrity is questionable, and parts of those walls are convexly curved
c,0
The plant was abandoned in Sept/Oct 2009 by the ORC, Clayton Oaks. The facility is currently under a NOV/NRE on the
last inspection. We were waiting the outcome of the recent activity prior to sending the enforcement to Bob Sledge
(our enforcement contact). And as you know, we are awaiting with the pending injunction.
I think this morning's call covered most of the history you would need to know, so I won't bother to repeat that
conversation. We are compiling the permittee's compliance history for 2009/2010 and will have that at the meeting. I
will also have various pictures should those be requested. If you have any further questions, don't hesitate to ask.
Thank You,
Donna Hood
From: Wakild, Chuck
Sent: Thursday, August 12, 2010 9:29 AM
1

To: Krebs, Rob; Hood, Donna
Subject: FIN: Union County/Trotter Summary
FYI
From: Belnick, Tom
Sent: Wednesday, August 11, 2010 4:49 PM
To: Wakild, Chuck; Matthews, Matt; Laton, Don
Cc: Poupart, Jeff; Sledge, Bob
Subject: Union County/Trotter Summary
The following information pertains to the Goose Creek issues:
NC0085359- Union County/12 Mile Creek
• Current Permitted flow= 6.0 MGD (averaged 3.4 MGD in CY2009) to 12 Mile Creek
• Stream study conducted Summer 2009 shows low DO attributable to natural conditions upstream.
• Currently requesting spec limits for 9, 12, 15 MGD
• DWQ has held several meetings with Union County to discuss potential expansion and Goose Creek issues:
o 11/3/08- discussed expansion possibility, provided they conduct instream study of low DO
o 5/8/09- discussed expansion, plus Union County stated they did not plan to rescind Goose Creek permit
due to severe capacity limitations at 12 Mile Creek WWTP
o 7/7/2010- discussed expansion possibility, plus how Goose Creek permits may come into play.
NC0072508- Union County/Hunley Creek WWTP
• Current Permitted phased flow = 0.231/0.35 MGD to Goose Creek
• Flow diverted to Union County/12 Mile Creek in May 2006
• Union County maintaining permit, despite flow diversion away from plant
NC0034762- Goose Creek Utility/Fairfield Plantation WWTP (Trotter)
• Current Permitted Flow= 0.070 MGD to Goose Creek
• Trotter has 2006 MOA with Union County to divert flow to Union County/12 Mile
• Trotter contested last 2 permits, but voluntarily dismissed the contested case in 2010; 2006 permit limits
effective July 2010
• Impending Injunctive Relief case still pending- DWQ contacts are JeffP/BobSledge
Tom Belnick
Supervisor, Complex NPDES Permitting Unit
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
2

(4'iVi- Y1
e/70/D
Selnick, Tom
From: Belnick, Tom
Sent: Wednesday, August 11, 2010 4:49 PM
To: Wakild, Chuck; Matthews, Matt; 'Caton, Don'
Cc: Poupart, Jeff; Sledge, Bob
Subject: Union County/Trotter Summary
The following information pertains to the Goose Creek issues:
NC0085359- Union County/12 Mile Creek
• Current Permitted flow= 6.0 MGD (averaged 3.4 MGD in CY2009) to 12 Mile Creek
• Stream study conducted Summer 2009 shows low DO attributable to natural conditions upstream.
• Currently requesting spec limits for 9, 12, 15 MGD
• DWQ has held several meetings with Union County to discuss potential expansion and Goose Creek issues:
o 11/3/08- discussed expansion possibility, provided they conduct instream study of low DO
o 5/8/09- discussed expansion, plus Union County stated they did not plan to rescind Goose Creek permit
due to severe capacity limitations at 12 Mile Creek WWTP
o 7/7/2010- discussed expansion possibility, plus how Goose Creek permits may come into play.
NC0072508- Union County/Hunley Creek WWTP
• Current Permitted phased flow = 0.231/0.35 MGD to Goose Creek
• Flow diverted to Union County/12 Mile Creek in May 2006
• Union County maintaining permit, despite flow diversion away from plant
NC0034762- Goose Creek Utility/Fairfield Plantation WWTP (Trotter)
• Current Permitted Flow= 0.070 MGD to Goose Creek
• Trotter has 2006 MOA with Union County to divert flow to Union County/12 Mile
• Trotter contested last 2 permits, but voluntarily dismissed the contested case in 2010; 2006 permit limits
effective July 2010
• Impending Injunctive Relief case still pending- DWQ contacts are JeffP/BobSledge
Tom Belnick
Supervisor, Complex NPDES Permitting Unit
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
1

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tBelnick, Tom
From: Behm, Pamela
Sent: Tuesday, August 03, 2010 9:15 AM
To: Belnick, Tom
Cc: Nowell, Jackie; Clark, Alan; Stecker, Kathy; Reid, Dianne; Williams, Melanie
Subject: Union County WWTP Spec Comments
Attachments: MTU Union county comments.docx
Hi Tom,
Attached are our comments on the model developed to evaluate impact of the proposed Union County WWTP
expansion. Please let me know if you have any questions/concerns. Thanks.
Pam
***************************************************************
Pam Behm
NC DWQ Modeling and TMDL Unit
1617 Mail Service Center
Raleigh, NC 27699
New email address: [e-mail]
Phone: [phone].
Fax: [phone].
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
1

INTEROFFICE MEMORANDUM
TO: Tom Belnick, Complex Permitting Unit
FROM: Pam Behm, Modeling & TMDL Unit
SUBJECT: MTU Comments on Union County Request for Speculative Limits to Expand Discharge into
Twelve Mile Creek
DATE: 7/30/2010
CC: Jackie Nowell, Alan Clark, Kathy Stecker, Dianne Reid, Melanie Williams
The following provides a summary of the Modeling and TMDL Unit's (MTU) evaluation of the report
titled "Draft Scoping Level Assessment of Assimilative Capacity in Twelve Mile Creek Below the Union
County WWTP," prepared by Tetra Tech, April 2010 and associated modeling files. DWQ received the
modeling files from Tetra Tech on July 7, 2010.
1. The QUAL2E scoping level model was developed by Tetra Tech to evaluate assimilative capacity
in Twelve Mile Creek and assess the impact of expanding Union County WWTP to 15 MGD. Note
that DWQ did not have input on the modeling plan.
This model was created as a scoping level assessment tool based on limited data. If speculative
limits are issued, the model should be validated through additional data collection and results
evaluated by DWQ before final permit limits are issued to provide confidence accepting the
model results. Data collection should begin as soon as possible to capture worst case conditions
through the summer months and should include multiple sampling events. Data should be
collected at the sites of the scoping level calibration points as well as through the reaches of the
three DO sag points predicted by the model (located 2 miles, about 10 miles, and about 12.5
miles downstream of the discharge, as shown in the figure below). Data collection efforts
should also include measurement of BOD-5 at upstream and Six Mile Creek sites to confirm
model estimates.
Of particular concern is the second sag point 7-10 miles downstream of the discharge when DO
dramatically decreases to well below the standard ("Reach E" on Figure 5 of the model report,
included below). Slope approximations were estimated from 10-meter LIDAR contour data
measured along the top of the bank for the entire length of the channel. The slope through this
area is very low relative to the rest of the system. The model results indicate that this sag is not
caused by the discharge, but there is no data available to confirm conditions through this area.
Data collection through this area will provide additional confidence accepting model predictions.

2. Summary of scoping level QUAL2E model predictions (keeping in mind the uncertainty involved,
as discussed above):
a. The model indicates that the increase in discharge does not worsen existing conditions, see
the figure included below.
b. As requested by NPDES, MTU ran the model with an effluent DO concentration of 9.0 mg/L.
The model indicates that increasing effluent DO to 9 mg/L from 6 mg/L does not improve
downstream DO.
c. The future expansion to 15 MGD scenario was run with effluent concentrations of 6.0 mg/L
for DO, 1.0 mg/L for ammonia, and 5.0 mg/L for BOD-5.
9
8
7
6
J
et▪ a ▪ 5
O 4
c
3
2
1
0
Union County WWTP impact on DO in Twelve Mile Creek
No Discharge
Existing Actual (3.4 MGD)
Fut (15 MG D), DO at 6 mg/L - - - Fut (15 MGD) DO at 9 mg/L'
`
_—r
1 ‘♦
i
1
j—s--
2 4 6 8 10 12
1
WWTP
Discharge
Distance Downstream from Discharge (in miles)

t.
Catawba
River
• Star, 'Avis
Legend
X-Section Locations
Model Reach IDs
sosramo
G
H
QNC_boundary
County Boundary
Six Mile Creek Subwatershed
Twelve Mile WWTP Subwatershed
Twelve Mile Watershed
T*.w.• rw a.aw.r.e.a
HAD•rItl 3W.r.J...•C.M.!.y 3700 Iw
16.rH.c...•d3N0•• ?wow
0 0.25 0.5 1 1.5 2 ( ^"
Miles .._
Figure 5. Location of Channel Cross Section Measurements on Twelve Mile Creek.
From: Scoping Level Assessment of Assimilative Capacity in Twelve Mile Creek Below the Union County
WWTP. Tetra Tech, April 2010. Draft.

Cw4i/)LJv1i/e/'
jee,c M
$elnick, Tom
-7(7/Zo to
From: [e-mail]
Sent: Wednesday, July 07, 2010 2:00 PM
To: Belnick, Tom
Cc: Poupart, Jeff; Nowell, Jackie; Stecker, Kathy; Behm, Pamela; Krebs, Rob;
[e-mail]; [e-mail]; [e-mail]
Subject: Re: NC0085359/Union County 12 Mile Spec Request
Thanks for the update. If there is anything we can do to help expidite your review please let us know.
Union COunty staff and its consultants are ready to meet with you at any time to assist.
Edward Goscicki, P.E.
Director
Union County Public Works
500 North Main St. Suite 500
Monroe, NC 28112
Office: 704-296-4212
FAX: [phone]
[e-mail]
- ---"Belnick, Tom" <[e-mail]> wrote:
To: "[e-mail]"<[e-mail]>
From: "Belnick, Tom" <[e-mail]>
Date: 07/07/2010 12:49PM
cc: "Poupart, Jeff" <[e-mail]>, "Nowell, Jackie" <[e-mail]>, "Stecker,
Kathy" <[e-mail]>, "Behm, Pamela" <[e-mail]>, "Krebs, Rob"
<[e-mail]>
Subject: NC0085359/Union County 12 Mile Spec Request
Ed- just wanted to let you know that DWQ received on 6/18/2010 your request for speculative limits for 12
Mile Creek, to go from the current 6 MGD permitted flow to 9, 12, and 15 MGD. In addition, DWQ just
received from Tetra Tech the water quality model used in their scoping level projections. DWQ will review this
model, then proceed to development of speculative limits. This effort might take a few months, given current
workload. If you have any questions on the process, feel free to contact me.
Tom Belnick
Supervisor, Complex NPDES Permitting Unit
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and
may be disclosed to third parties.
1

•�'l4corl re,.�u�I Mie
Belnick, Tom
777/2ai 0
From: Stecker, Kathy
Sent: Wednesday, July 07, 2010 11:12 AM
To: Poupart, Jeff; Belnick, Tom; Nowell, Jackie
Cc: Behm, Pamela
Subject: Union County update
Importance: High
We just got the model!
Kathy Stecker
NCDWQ
919-807-6422
[e-mail]
NOTICE: Emails sent to and from this account are subject to Public Records Law and may be
disclosed to third parties.
1

L,(kI7/7/Vfl0 �����N,6jrn���f;!re �womiw
Belnick, Tom
Subject:
Location:
Start:
End:
Union County/12 Mile Regroup
9th floor file room
Wed 7/7/2010 10:00 AM
Wed 7/7/2010 11:00 AM
Recurrence: (none)
Meeting Status: Meeting organizer
Organizer: Belnick, Tom
Required Attendees: Poupart, Jeff; Stecker, Kathy; Nowell, Jackie; Behm, Pamela
We met with Union County on 6/8/2010 to discuss possible expansion at 12 Mile Creek, and said we would get back with
decision in one m n__� th_ Time to regroup. If you have copies of the Tetra Tech model report, please bring t eeting.
TAet4 V1/� 1Q�t`
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v.

HAZEN AND SAWYER
Environmental Engineers & Scientists
June 16, 2010
Mr. Tom Belnick, Supervisor
Complex Permitting Unit
Surface Water Protection Section - NPDES
Division of Water Quality
N.C. Department of Environment and Natural Resources
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Dear Mr. Belnick:
Hazen and Sawyer, P.C.
4944 Parkway Plaza Blvd.
Suite 375
Charlotte, NC 28217
1704) 357-3150
1704) 357-3152 (Fax)
Re: Request for Speculative Limits
Twelve Mile Creek WWTP
Union County, North Carolina
NPDES Permit No. NC0085359
On behalf of Union County, Hazen and Sawyer would like to thank you for meeting with us
on June 81h, 2010 to discuss the expansion options for the County's Twelve Mile Creek
Wastewater Treatment Plant (WWTP). As discussed in the draft report for the Expansion
Alternatives Development Study that we left with you for your review, the County has been
pursuing several options for disposal and/or diversion of projected future wastewater flows in
the Twelve Mile Creek WWTP service area. These options range from diverting raw sewage
to other wastewater treatment plants operated by neighboring utilities to pumping treated
effluent directly to the Catawba River.
The County has also been diligent over the past three years in collecting dissolved oxygen
data in the creek both upstream and downstream of the current discharge. Using this data, a
scoping level model of additional treated effluent discharge into the creek was completed as
part of our alternatives analysis. Since the results were favorable, we would like to request
I eGo Is de a c r of increasing discharge flows into Twe!ve 11 /l i!e Greek
Based on the above and your recommendation for continuing this discussion, we are hereby
requesting speculative NPDES discharge limits for an expansion of the WWTP's current
permitted capacity of 6.0 mgd to future expanded total capacities of 9.0, 12.0, and 15.0 mgd
(i.e., increasing discharge by 3, 6, and 9 mgd) to account for near -term and long-term
wastewater needs. Since expansion of the current discharge represents one of the most
favorable options in terms of capital costs, O&M costs, and overall sustainability, the County
is willing to discuss a range of options for improvements and control within the watershed to
ensure long-term environmental protection of the creek.
JUN 18 2010
QEi�tR r•.R QUAL i f
POINT SOURCE BRANCH
TBelnick 061610 Itr.docx
New York, NY Philadelphia, PA Raleigh, NC Charlotte, NC • Greensboro, NC • Greensboro, NC Charleston, SC • Atlanta, GA • Fairfax, VA • Hampton Roads, VA Baltimore, MO - Cincinnati, 0H Hollywood, FL Boca Raton, FL • Miarni, FL

HAZEN AND SAWYER
Mr. Tom Belnick
Page 2 of 2
Thank you for review of this request for speculative limits and for your assistance on this project.
If you have any questions or would like additional information, please do not hesitate to contact
me at 704-357-3150 or at istruvehazenandsawyer.com.
Very truly yours,
HAZEN AND SAWYER, P.C.
James N. Struve, P.E.
Vice President
cc: Mr. Ed Goscicki, Union County Public Works
Mr. Scott Huneycutt, Union County Public Works
Mr. Scott Alpert, Hazen and Sawyer
TBelnick 061610 Itr.docx

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From: Struve, James N. [jstruve©hazenandsawyer.com]
Sent: Monday, May 24, 2010 5:03 PM
To: Belnick, Tom
Subject: RE: Union County 12-Mile Creek WWTP Expansion Alternatives St . - Meeting
Thanks Tom for coordinating. We look forward to seeing you then.
Jim
James N. Struve, P.E.
Hazen and Sawyer, P.C.
4944 Parkway Plaza Boulevard, Suite 375
Charlotte, NC 28217
Office [phone]
Cell [phone]
Fax [phone]
Email jstruve a(�hazenandsawyer.com
From: Belnick, Tom [mailto:[e-mail]]
Sent: Monday, May 24, 2010 4:41 PM
To: Struve, James N.
Subject: RE: Union County 12-Mile Creek WWTP Expansion Alternatives Study - Meeting
Jim- June 8th, 11-12 will work. I've reserved our conference room on Archdale 9'' floor.
Tom Belnick
Supervisor, Complex NPDES Permitting Unit
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
From: Struve, James N.[mailto:[e-mail]]
Sent: Wednesday, May 19, 2010 3:38 PM
To: Belnick, Tom
Subject: RE: Union County 12-Mile Creek WWTP Expansion Alternatives Study - Meeting
I understand Torn. Thanks for the update.
Jim
James N. Struve, P.E.
Hazen and Sawyer, P.C.
4944 Parkway Plaza Boulevard, Suite 375
Charlotte, NC 28217
Office [phone]
Cell [phone]
Fax [phone]

Email istruve(ahazenandsawyer.com
From: Belnick, Tom [mailto:[e-mail]]
Sent: Wednesday, May 19, 2010 12:09 PM
To: Struve, James N.
Subject: RE: Union County 12-Mile Creek WWTP Expansion Alternatives Study - Meeting
Jim- haven't forgotten, still trying to get feedback from other folks.
Tom Belnick
Supervisor, Complex NPDES Permitting Unit
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
Original Appointment
From: Struve, James N.[mailto:jstruvefthazenandsawyer.com]
Sent: Thursday, May 06, 2010 11:42 AM
To: Ed Goscicki ([e-mail]); Tom Belnick; Trevor Clements ([e-mail]);
Alpert, Scott
Cc: Taylor, Ronald L.
Subject: Union County 12-Mile Creek WWTP Expansion Alternatives Study - Meeting
When: Tuesday, June 08, 2010 11:00 AMI.12:00 PM (GMT-05:00) Eastern Time (US & Canada).
Where: DWQ - Archdale Building - Raleigh, NC
All,
Based on everyone's schedule, Tuesday, June 8", at 11:00 AM appears to be the best date to meet.
Tom — Hopefully you can reserve a conference room for us on the 9`h floor (?).
2

NCVitt5351
Belnick, Tom
From:
Sent:
To:
Subject:
Tom,
Alpert, Scott [[e-mail]]
Thursday, March 11, 2010 1:59 PM
Tom Belnick
Union County Twelve Mile Creek Wastewater Alternatives Study
v., 13%t G N j 1/f 614,
As you are aware, Hazen and Sawyer has been working with Union County in evaluating options for handling additional
flow in the Twelve Mile Creek WWTP service area. We are currently evaluating several different alternatives. In
performing this analysis, we'd like to receive informal input from you and/or your staff about permitting requirements
to make sure we have a good understanding of what would be required for each alternative. Our main questions
concern a non -conjunctive vs. seasonal/tiered reuse permit and DENR's role in the options that involve ultimate
discharge in South Carolina.
I have listed below several of the alternatives and the specific questions/discussion related to each. I would like to
arrange either a conference call or face-to-face meeting to discuss. Looking at site maps sitting around a table tends to
provide more clarity, but I think a conference call would suffice and be easier to arrange. If you could review the
information below and contact me by email or phone with your initial thoughts and how to coordinate a call or meeting,
I would appreciate it.
Thank you.
Scott
Scott M. Alpert, PhD, PE
Senior Principal Engineer
Hazen and Sawyer, P.C.
4944 Parkway Plaza Blvd., Suite 375
Charlotte, North Carolina 28217
Phone: [phone]
Fax: [phone]
Direct: [phone]
Email: salperta( hazenandsawyer.com
Al 6-0
Qpu1 = -F3,ti1(7O
3EPA 7 0.sM6D
New ^'' >I!►1O
Set ,� km It >3M"1
X
Alternative 1: Buy Additional Capacity at McAlpine Creek WWMF (Charlotte -Mecklenburg Utilities)
Discussion Item(s): Permitting requirements for construction/expansion of the diversion pum station at Twelve Mile
Creek WWTP for conveyance into CMU's Six Mile Creek Interceptor.
Alternative 2: Buy Additional Capacity at the Indian Land WWTP (LCWSD)
For this alternative, the County would partner with Lancaster County (SC) Water and Sewer District (LCWSD) to buy
treatment capacity at the Indian Land WWTP. To accommodate 3 MGD from Union County, the Indian Land WWTP
would need to be expanded. Construction of a new force main between the Twelve Mile Creek WWTP and the
Indian Land WWTP would also be required. -t-dif$w)1" 3 IZ,ho'l
1

Discussion Item(s): What would DENR's role be for this alternative (e.g., permitting of new pump station at Twelve
Mile Creek WWTP, permitting of force main within NC, etc.)?
Alternative 3: Partner with LCWSD to Build a New Treatment Plant
Alternative 3 requires a partnership with LCWSD to construct a new WWTP to serve portions of Union and
Lancaster Counties that are not currently served by either. A new treatment plant could also be sized to treat future
flows from southwestern Union County. Both counties would need to develop appropriate service areas and identify
a location for this new treatment plant. This treatment plant would ultimately discharge into the Catawba River.
Discussion Item(s): What would DENR's role be for this alternative (e.g., permitting of new pump station at Twelve
Mile Creek WWTP, permitting of force main within NC, etc.)?
Discussion Item(s): What would DENR's role be for this alternative (e.g., permitting of new pump station at Twelve
Mile Creek WWTP, permitting of force main within NC, etc.)?
Alternative 4: Develop
stem for the Twelve Mile Creek WWTP Effluent
This alternative focuses on developing . "non -conjunctive" r use system to land apply final treated effluent from the
Twelve Mile Creek WWTP onto suitable an • . ' - • - and within the vicinity of the Plant. This alternative would
require expansion of the Twelve Mile Creek WWTP including flow equalization and final effluent storage necessary
for a reuse system and construction of effluent conveyance facilities from the Plant to the land application sites.
Discussion Item(s): Potential for a tiered and/or seasonal permit that would allow discharge to the creek beyond 6
mgd during high stream flow conditions.
Alternative 5: Discharge Additional Plant Effluent Directly into the Catawba River
The Twelve Mile Creek WWTP would be expanded to 9 MGD with the flows above 6 MGD conveyed and
„discharged directly to the Catawba River near the Catawba River Water Treatment Plant. Speculative limits to
discharge directly to the Catawba River were issued by SC DHEC in January 2008 for additional flows of 3, 6, and 9
MGD. To convey treated effluent to the Catawba River, the County would consider'converting the smaller of the two
parallel high -service pipelines (1-24" diameter, 1-42" diameter), that currently carry drinking water from the WTP to
Union County, to a wastewater forcemain.
Discussion Item(s): What would DENR's role be for this alternative (e.g., permitting of new pump station at Twelve
Mile Creek WWTP, permitting of force main within NC, etc.)?
2

(91 1264 to CI ran C��N
'Belnick, Tom
From: Hood, Donna
Sent: Thursday, September 24, 2009 4:15 PM
To: Belnick, Tom
Subject: RE: 12-Mile Stream Monitoring
Sorry Tom, I just realized I did not reply to this!!! The low DO's are naturally occurring.
From: Belnick, Tom
Sent: Tuesday, September 08, 2009 6:05 PM
To: Hood, Donna; Caldwell, Peter
Subject: FW: 12-Mile Stream Monitoring
Donna/Pete- This is the final data set from Union County on 12 Mile Creek low DO study. Data for August shows DOs in
the 2-3 mg/I range at most upstream locations. Are you folks comfortable with the conclusion that low DOs are
naturally occurring in this area in the summer?
Tom Belnick
Supervisor, NPDES West Program
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
From: [e-mail] [mailto:[e-mail]]
Sent: Tuesday, September 08, 2009 9:15 AM
To: Belnick, Tom; Poupart, Jeff; Krebs, Rob
Cc: [e-mail]; [e-mail]; [e-mail]
Subject: Fw: 12-Mile Stream Monitoring
Good morning. Extracurricular stream sampling for Twelve Mile Creek in Union County is complete for
now. Please see the e-mail and attachments below. Thank you for the opportunity to cooperatively look
into low dissolved oxygen levels in the stream. Union County is looking forward to further working with
DWQ to resolve 12 Mile Creek WWTP restrictive discharge issues.
Mark Tye
Assistant Public Works Director
(phone) 704 296-4215
(fax) 704 296-4232
Forwarded by Mark Tye/UnionCounty on 09/08/2009 09:03AM
To: Mark Tye/UnionCounty@UnionCounty
From: John Hahn/UnionCounty
Date: 09/03/2009 04:05PM
Subject: Fw: 12-Mile Stream Monitoring
Mark,
The data forwarded to you are presented as two seperate files. One file has Twelve Mile stream data from
May 14 through August 4 which was collected in the morning hours. The second file has data that was
collected from August 6 through August 27 in the afternoon. The second file also includes a "second" data
1

point (referred to as Upstream 1A which was requested by NC DWQ staff participating in the data
collection. This data is the location that I had discussed with you earlier having the "venturi-like" funnel to
facilitate D.O. sampling during "low" (near non-existent) flows resultant from drought conditions. UCPW
continued to sample at the original Upstream 1 location as a comparison. Please advise if you have any
questions.
Thanks,
John
Forwarded by John Hahn/UnionCounty on 09/03/2009 03:16PM
To: John Hahn/UnionCounty@UnionCounty
From: ucwwtp/UnionCounty
Date: 09/03/2009 03:01PM
Subject: 12-Mile Stream Monitoring
John:
Here is the completed monitoring data of 12-Mile Creek. One file of monitoring in morning and one
file of monitoring in afternoon.
Thanks, Nelson
2

(Ak046Kn /,- %1i.l✓ tiAKI : ft4', thi oxawK, lb?
711,2 Piet WQA?o/lfl
'Belnick, Tom /tt1 Spec
From: [e-mail] -^"' A ,,j(
Sent: Tuesday, September 08, 2009 9:15 AM ©14 i r 6,r2iedia4Of'43
To: Belnick, Tom; Poupart, Jeff; Krebs, Rob
Cc: [e-mail]; [e-mail]; [e-mail]
Subject: Fw: 12-Mile Stream Monitoring
Attachments: 12-MILE MONITRING May 14th thru August 4th morning monitoring.xls; 12-MILE
MONITRING August 6th thru 27th afternoon monitoring.xls
Good morning. Extracurricular stream sampling for Twelve Mile Creek in Union County is complete for
now. Please see the e-mail and attachments below. Thank you for the opportunity to cooperatively look
into low dissolved oxygen levels in the stream. Union County is looking forward to further working with
DWQ to resolve 12 Mile Creek WWTP restrictive discharge issues.
Mark Tye Assistant Public Works Director SI/P.") )eOn'--
(phone) 704 296-4215
(fax) 704 296-4232
Forwarded by Mark Tye/UnionCounty on 09/08/2009 09:03AM
To: Mark Tye/UnionCounty@UnionCounty
From: John Hahn/UnionCounty
Date: 09/03/2009 04:05PM
Subject: Fw: 12-Mile Stream Monitoring
Mark,
The data forwarded to you are presented as two seperate files. One file has Twelve Mile stream data from
May 14 through August 4 which was collected in the morning hours. The second file has data that was
collected from August 6 through August 27 in the afternoon. The second file also includes a "second" data
point (referred to as Upstream 1A which was requested by NC DWQ staff participating in the data
collection. This data is the location that I had discussed with you earlier having the "venturi-like" funnel to
facilitate D.O. sampling during "low" (near non-existent) flows resultant from drought conditions. UCPW
continued to sample at the original Upstream 1 location as a comparison. Please advise if you have any
questions.
Thanks,
John
Forwarded by John Hahn/UnionCounty on 09/03/2009 03:16PM
To: John Hahn/UnionCounty@UnionCounty
From: ucwwtp/UnionCounty
Date: 09/03/2009 03:01PM
Subject: 12-Mile Stream Monitoring
John:
Here is the completed monitoring data of 12-Mile Creek. One file of monitoring in morning and one
file of monitoring in afternoon.
Thanks, Nelson
1

SUP;/164M it709
TEMPERATURE AND DO MONITORING FOR 12-MILE CREEK
Page 1 .
Collection Points
N.C. DOWNSTREAM 1
12-MILE PLANT
N.C. UPSTREAM 1
1/4 Mile Above Plant
Discharge at NC-16
Bridge
N.C. UPSTREAM 2
Cuthbertson Rd. 1/4
Mile off NC-16 at
SR-1321 Bridge
N.C. UPSTREAM 3
Howie Mine Rd. 3/4
Mile from NC-16 At SR
1008 Bridge
N.C. UPSTREAM 4
Waxhaw - Indian Trail
Rd. between New
Town Rd. and NC-16
at SR-1008 Bridge
N.C. UPSTREAM 5
Shannon DR. 1/4 mile
Off of Waxhaw-Indian
Trail Rd. at SR -
1328 Bridge
1/4 Mile Below Plant
Discharge at SR-1301
Bridge
12-Mile Creek or
Tributary
12 Mile Creek
12 Mile Creek
12 Mile Creek
TRIBUTARY
TRIBUTARY
12 Mile Creek
12 Mile Creek
GPS
Locations
RAIN
FALL
(X)
(Y)
1468992.770238
439563.400324
CASCADE
(X) 1473859.526891
(Y) 442224.933192
(X) 1475111.812431
(Y) 444086.541596
(X) 1481608.866568
(Y) 435043.905916
(X) 1487551.071974
(Y) 446145.271539
(X) 1490029.493469
(Y) 448324.357226
Dates
AMOUNTS
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
5/14/2009
0.0
10:00
17.1
6.53
9:19
19.2
8.11
10:11
16.6
6.46
10:34
16.7
7.73
10:50
16.2
6.60
11:00
16.4
5.94
11:05
16.6
6.33
5/15/2009
0.0
7:40
18.5
6.85
9:07
20.1
7.78
7:50
17.7
6.12
8:00
18.0
6.81
8:17
17.3
6.32
8:25
17.5
6.00
8:30
17.6
5.80
5/18/2009
0.4
9:48
16.6
6.96
9:12
20.0
8.90
10:00
16.3
6.98
10:12
16.1
7.94
10:12
16.1
7.94
10:50
14.7
8.10
10:59
15.8
6.94
5/20/2009
0.0
9:28
15.1
7.58
8:45
18.2
8.90
9:41
14.3
7.48
9:49
14.6
7.29
10:06
13.8
6.85
10:15
14.1
7.14
10:23
14.3
7.28
5/22/2009
0.0
8:57
17.8
6.32
8:47
19.7
8.40
9:08
16.7
7.00
9:18
16.9
7.15
9:36
16.5
5.79
9:45
16.5
6.28
9:51
16.7
6.30
5/26/2009
1.0
10:00
20.5
7.29
9:42
21.2
8.40
10:11
20.5
5.49
10:19
21.5
7.50
10:34
19.3
6.75
10:39
20.1
6.94
10:47
20.1
6.90
5/27/2009
0.0
9:41
20.8
6.52
9:28
19.6
8.67
9:49
20.9
5.4-2
9:55
21.9
5.71
10:20
20.3
5.82
10:37
20.4
5.95
10:50
20.5
6.19
5/29/2009
0.8
9:20
20.5
6.79
8:46
21.2
8.60
9:29
20.6
5.69
9:40
20.7
7.63
9:54
19.9
7.30
10:01
20.4
6.00
10:06
20.2
7.01
6/1/2009
0.0
9:45
20.2
5.60
9:22
21.0
8.96
9:57
20.3
5.13
10:05
20.1
7.51
10:20
19.5
5.36
10:32
19.9
4.32
10:37
19.9
5.72
6/3/2009
0.0
9:27
21.3
4.69
9:13
21.3
8.90
9:34
21.0
4.84
9:50
21.1
6.84
10:04
20.8
4.58
10:13
20.9
3.43
10:21
20.9
5.27
6/5/2009
1.2
9:01
21.2
6.83
8:44
21.2
8.96
9:10
20.9
6.13
9:18
20.9
7.54
9:33
20.0
6.57
9:40
20.5
6.73
9:46
20.7
6.83
6/8/2009
0.0
10:07
20.9
6.98
9:08
21.3
8.90
10:18
21.1
5.82
10:27
21.1
7.79
10:43
20.4
5.52
10:51
20.5
5.86
10:57
20.4
6.43
6/10/2009
0.0
9:37
21.8
7.26
8:41
22.0
9.45
9:44
21.6
6.07
10:07
21.8
8.19
10:27
21.3
4.68
10:38
21.5
5.98
10:47
21.5
6.11
6/12/2009
0.2
9:00
21.3
7.45
8:30
22.1
8.95
9:12
21.3
7.46
9:22
21.4
8.48
9:38
20.2
5.69
9:46
20.8
7.30
9:54
20.9
7.91
6/16/2009
0.0
8:55
22.4
5.63
8:41
22.6
7.86
9:04
22.0
5.73
9:13
22.2
6.20
9:28
21.9
3.13
9:38
21.9
4.66
9:50
22.1
4.57
6/18/2009
0.2
9:20
21.6
6.24
8:49
22.5
7.94
9:40
21.6
5.80
9:30
21.6
7.38
9:55
21.9
5.71
10:02
21.4
5.50
10:08
21.4
6.67
6/23/2009
0.0
9:20
22.5
5.21
8:58
23.0
7.70
9:34
22.3
5.22
9:40
22.4
6.21
10:08
21.4
3.23
10:16
22.3
3.53
10:23
22.3
4.30
6/25/2009
0.0
9:16
22.4
5.55
9:03
22.8
8.35
9:24
21.9
5.47
9:32
21.9
6.08
9:43
21.5
2.86
9:51
22.0
4.14
9:56
22.1
4.24
6/30/2009
0.0
10:20
22.1
5.51
9:20
23.0
7.84
10:31
21.6
5.79
10:10
21.7
6.36
10:51
20.7
2.64
10:58
21.2
3.90
11:04
21.8
3.15
7/2/2009
0.0
11:27
22.5
5.68
7:30
23.0
7.52
11:19
22.8
5.93
10:46
22.6
5.34
10:32
21.0
2.88
10:25
21.4
3.25
10:21
21.9
3.28
7/7/2009
0.0
9:24
22.9
3.99
9:03
23.8
7.57
9:43
22.7
3.17
9:52
22.7
4.73
10:13
22.2
2.47
10:21
21.9
2.72
10:26
22.2
2.77
7/9/2009
0.1
9:41
22.3
4.66
9:02
23.0
7.70
9:49
21.3
4.60
9:59
21.4
3.89
10:17
20.3
3.07
10:25
21.1
3.92
10:32
21.5
2.85
7/14/2009
0.0
9:28
22.8
4.09
8:52
23.3
8.33
9:39
22.4
4.20
9:46
22.3
5.32
10:03
21.3
2.35
10:11
21.9
2.46
10:16
22.1
2.34
7/16/2009
0.0
9:09
22.9
4.94
8:47
23.4
7.85
9:16
22.8
4.24
9:27
22.8
4.62
9:45
22.3
2.56
9:52
22.2
2.45
9:57
22.6
2.43
7/21/2009
1.8
8:55
20.3
7.00
8:46
22.9
8.35
9:03
20.1
5.85
9:10
20.3
7.74
9:20
19.1
8.05
9:27
20.1
6.27
9:35
20.6
6.30
7/23/2009
0.0
9:22
22.6
6.32
8:47
23.7
7.92
9:32
21.8
6.31
9:40
22.0
6.55
9:57
21.2
4.83
10:05
21.7
3.40
10:11
22.0
4.32
7/28/2009
0.2
9:22
23.5
5.38
9:01
24.2
8.94
9:37
23.3
4.16
9:45
23.1
4.60
10:16
23.1
2.51
10:28
22.8
2.83
10:34
23.2
3.54
7/30/2009
0.0
9:26
23.6
5.22
8:35
24.3
7.90
9:37
23.2
5.11
9:46
25.3
5.45
9:59
23.0
3.43
10:07
23.1
3.64
10:13
23.3
4.34
8/4/2009
0.0
10:00
23.4
5.19
8:46
24.1
7.15
10:18
22.9
5.36
10:41
23.3
6.05
11:04
23.2
2.42
11:25
23.8
4.32
11:34
23.0
4.83
Color Coded Stream
Description
clear water
Slightly Turbid
Turbid
Very Turbid
Muddy
Very Muddy
0 thru 5 NTU
6 thru 10 NTU
11 thru 20 NTU
21 thru 50 NTU
50 thru 100 NTU
> 100 NTU
DI
otA4411 uI
(C Fiiue��)
B
Tice&
uP
uP

TEMPERATURE AND DO MONITORING FOR 12-MILE CREEK
Page 2
Collection Points
N.C. UPSTREAM 6
Shannon DR. 3/4 mile
Off of Waxhaw Indian
Trail Rd. at SR-
1328 Bridge
N.C. UPSTREAM 7
Billy Howie Rd
Between Pleasant
Grove Rd. and New
Town Rd.at SR-
1329 Bridge
N.C. UPSTREAM 8
Chamberwood Rd.
2/10 of a Mile off
New Town Rd.
at SR-1336 Bridge
N.C. UPSTREAM 9
S. Potters Rd. 1/4 Mile
from New Town Rd. at
SR-1162 Bridge
N.C. UPSTREAM 10 S.
Potters Rd. Between
New Town Rd. and NC
84 at SR-1162
Bridge
N.C. UPSTREAM 11
Bridge on NC-84
1/2 Mile from
S. Potters Rd.
N.C. UPSTREAM 12
Bridge on NC-84
1 1/2 Miles from S.
Potters Rd.
12- Mile Creek or
Tributary
TRIBUTARY
TRIBUTARY
TRIBUTARY
TRIBUTARY
12 Mile Creek
12 Mile Creek
TRIBUTARY
GPS
Locations
RAIN
FALL
(X) 1490982.562517
(Y) 447487.550008
(X) 1495249.418332
(Y) 450548.909618
(X) 1496066.100757
(Y) 453952.839138
(X) 1502318.142066
(Y) 452322.647899
(X) 1501052.866603
(Y) 457654.412556
(X) 1502551.010019
(Y) 461182.267284
(X) 1507402.291668
(Y) 459665.611535
Dates
AMOUNTS
TIME
TEMP.
DO
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
5/14/2009
0.0
11:11
16.3
5.95
11:30
17.4
6.22
11:38
16.7
6.95
11:52
17.2
4.61
11:58
16.9
3.20
12:06
17.3
4.42
12:15
17.6
2.67
5/15/2009
0.0
8:36
16.9
5.45
8:45
17.2
5.86
8:52
17.4
6.55
9:00
17.4
4.55
9:05
16.9
3.80
9:14
18.6
4.21
9:20
17.9
3.45
5/18/2009
0.4
11:09
16.3
6.10
11:21
16.4
6.93
11:28
15.5
7.15
11:39
15.8
6.15
11:45
16.3
3.83
11:53
15.9
7.02
12:02
15.7
6.42
5/20/2009
0.0
10:28
14.1
6.05
10:38
14.6
7.40
10:48
14.3
7.29
10:54
14.1
5.65
11:01
14.6
4.64
11:09
15.5
5.73
11:16
15.5
4.71
5/22/2009
0.0
9:55
16.2
5.85
10:04
16.9
6.00
10:12
17.0
7.22
10:20
17.6
4.21
10:26
17.1
3.76
10:32
17.9
5.31
10:40
17.6
2.89
5/26/2009
1.0
10:52
20.6
6.69
11:01
20.1
6.75
11:06
19.8
6.96
11:14
20.5
6.13
11:20
20.9
3.25
11:27
21.5
5.23
11:39
21.1
5.42
5/27/2009
0.0
10:56
20.5
5.85
11:08
20.8
5.37
11:15
20.3
6.34
11:27
20.3
4.97
11:32
21.0
4.48
11:38
21.5
4.10
11:46
20.9
4.10
5/29/2009
0.8
10:08
20.3
7.59
10:17
20.3
6.81
10:23
20.3
8.08
10:33
20.3
5.08
10:38
21.1
4.79
10:46
21.0
5.76
10:51
20.9
4.89
6/1/2009
0.0
10:42
19.7
4.40
10:50
20.2
5.34
10:56
19.9
6.37
11:05
19.8
3.68
11:10
19.8
3.75
11:19
21.4
4.08
11:25
19.9
3.54
6/3/2009
0.0
10:24
20.4
3.31
10:33
21.3
4.93
10:39
20.8
5.89
10:50
21.0
4.31
10:54
20.6
4.01
11:00
22.3
3.10
11:06
21.0
4.58
6/5/2009
1.2
9:50
20.3
4.77
9:58
20.8
7.20
10:04
20.7
6.88
10:13
20.2
5.16
10:19
21.1
5.63
10:25
21.3
5.79
10:31
20.8
5.42
6/8/2009
0.0
11:01
20.2
5.55
11:11
21.1
5.65
11:17
20.9
6.24
11:27
20.4
4.89
11:34
21.6
4.00
11:45
21.7
3.36
11:48
20.6
4.46
6/10/2009
0.0
10:51
21.1
5.49
11:02
21.8
6.15
11:08
21.5
6.68
11:16
21.6
3.81
11:22
21.2
4.00
11:32
22.7
3.91
11:49
21.0
4.89
6/12/2009
0.2
9:58
20.8
6.18
10:06
21.0
7.26
10:12
21.4
7.12
10:22
20.9
4.78
10:34
22.0
5.61
10:40
21.0
5.98
10:47
22.0
3.89
6/16/2009
0.0
9:55
21.6
4.49
10:03
22.1
4.03
10:10
21.7
5.51
10:19
21.5
3.75
10:24
21.5
3.17
10:38
22.6
3.37
10:43
21.8
2.14
6/18/2009
0.2
10:12
21.2
4.89
10:20
21.7
6.32
10:26
21.4
6.50
10:34
21.1
4.92
10:38
22.4
5.18
10:46
22.6
6.51
10:52
22.5
5.23
6/23/2009
0.0
10:30
21.9
3.96
10:41
22.7
3.91
10:47
22.3
4.31
10:54
22.2
3.73
10:59
21.9
2.43
11:04
23.2
2.78
11:10
21.6
3.20
6/25/2009
0.0
10:01
21.6
4.11
10:08
22.3
3.60
10:15
21.6
5.62
10:24
22.4
3.95
10:31
21.4
2.82
10:40
23.4
3.46
10:44
21.4
2.29
6/30/2009
0.0
11:09
21.3
4.87
11:17
23.1
3.87
11:24
21.6
5.14
11:31
21.9
3.39
11:35
21.2
3.08
11:40
22.5
2.86
11:45
21.2
2.33
7/2/2009
0.0
10:15
21.4
3.96
10:07
22.3
3.77
10:02
21.3
4.78
9:59
21.7
3.69
9:52
21.2
3.23
9:45
22.1
4.58
9:40
22.2
2.58
7/7/2009
0.0
10:30
22.0
3.47
10:39
22.5
3.31
10:46
22.7
3.74
10:58
21.9
3.32
11:03
21.7
2.71
11:10
22.5
3.27
11:16
22.7
2.48
7/9/2009
0.1
10:36
21.3
3.76
10:45
21.6
3.12
10:52
21.0
3.83
11:00
21.0
3.60
11:07
21.3
2.21
11:14
21.5
2.49
11:20
21.9
2.06
7/14/2009
0.0
10:21
21.6
3.85
10:28
22.7
3.07
10:34
21.4
4.01
10:43
21.9
4.04
10:47
21.6
3.67
10:53
22.0
3.52
11:00
22.0
2.37
7/16/2009
0.0
10:01
22.1
3.51
10:12
23.2
3.99
10:18
22.2
4.80
10:26
23.0
4.21
10:32
22.8
3.37
10:39
22.5
3.12
10:46
22.6
2.26
7/21/2009
1.8
9:38
20.3
5.40
9:45
20.7
4.65
9:51
20.3
5.44
9:58
20.5
4.51
10:02
20.6
3.95
10:08
21.0
3.76
10:15
21.1
1.56
7/23/2009
0.0
10:14
21.7
3.10
10:22
22.1
4.21
10:29
22.0
5.01
10:37
22.3
1.61
10:43
22.2
3.26
10:50
22.2
3.38
10:56
22.6
2.16
7/28/2009
0.2
10:38
22.9
2.22
10:49
23.5
3.37
10:57
22.8
5.09
11:07
23.4
2.67
11:14
23.6
3.16
11:22
23.3
2.58
11:29
23.4
2.24
7/31/2009
0.0
10:18
23.0
3.83
10:27
23.7
3.21
10:33
23.1
4.98
10:44
23.8
3.45
10:51
23.5
2.31
10:58
24.1
2.82
11:05
23.9
3.29
8/4/2009
0.0
11:41
22.7
3.06
11:52
23.8
4.63
12:01
23.3
6.04
12:12
23.6
3.22
12:21
22.9
3.40
12:33
24.4
4.04
12.:43
22.9
3,93
Color Coded Stream
Discription
clear water
Slightly Turbid
Tu bid
Very Turbid
Muddy
Very Muddy
0 thru 5 NTU
6 thru 10 NTU
11 thru 20 NTU
21 thru 50 NTU
50 thru 100 NTU
> 100 NTU
TR,B
Tic)(
UP
uP

TEMPERATURE AND DO MONITORING FOR 12-MILE CREEK
Page 1
Collection Points
N.C.DOWNSTREAM 1
1/4 Mile Below Plant
Discharge at SR-1301
Bridge
12-MILE PLANT
N.C. UPSTREAM 1
1/4 Mile Above Plant
Discharge at NC-16
Bridge
N.C. UPSTREAM 1A
1/4 Mile Above Plant
Discharge under
NC-16 Bridge
N.C. UPSTREAM 2
Cuthbertson Rd. 1/4
Mile off NC-16 at
SR-1321 Bridge
N.C. UPSTREAM 3
Howie Mine Rd. 3/4
Mile from NC-16 At SR
1008 Bridge
N.C. UPSTREAM 4
Waxhaw - Indian Trail
Rd. between New
Town Rd. and NC-16
at SR-1008 Bridge
N.C. UPSTREAM 5
Shannon DR. 1/4 mile
Off of Waxhaw-Indian
Trail Rd. at SR -
1328 Bridge
12- Mlle Creek or
Tributary
12 Mile Creek
12 Mile Creek
12 Mile Creek
12 Mile Creek
TRIBUTARY
TRIBUTARY
12 Mile Creek
12 Mile Creek
GPS
Locations
RAIN
FALL
(X) 1468992.770238
(Y) 439563.400324
CASCADE
(X) 1473859.526891
(Y) 442224.933192
(X) 1473859.526891
(Y) 442224.933192
(X) 1475111.812431
(Y) 444086.541596
(X) 1481608.866568
(Y) 435043.905916
(X) 1487551.071974
(Y) 446145.271539
(X) 1490029.493469
(Y) 448324.357226
Dates
AMOUNTS
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
8/6/2009
0.4
14:34
24.6
5.85
8:47
24.3
7.68
14:45
23.8
5.17
14:48
23.8
6.27
14:52
23.4
6.89
15:13
24.0
3.12
15:30
23.9
4.51
15:34
24.0
4.15
8/11/2009
0.0
13:44
25.5
4.98
9:32
25.0
7.07
13:52
25.7
4.81
12:58
25.8
5.89
13:59
27.7
5.37
14:09
28.9
3.41
14:16
24.3
2.28
14:20
25.1
2.91
8/13/2009
0.0
14:23
23.9
5.35
9:37
24.3
7.62
14:31
23.5
3.88
12:12
23.0
5.80
14:36
23.6
4.21
14:46
22.9
2.20
14:52
26.8
2.21
14:57
23.1
2.81
8/18/2009
0.0
13:45
24.8
4.92
8:51
24.6
6.90
13:55
24.4
3.04
14:00
25.3
3.74
14:05
26.4
4.03
14:17
28.2
2.97
14:25
23.3
2.12
14:30
23.8
2.69
8/20/2009
0.0
13:57
25.2
4.66
8:44
24.8
7.73
14:08
25.1
3.72
14:13
26.1
3.60
14:19
26.6
3.56
14:30
27.6
3.98
14:38
23.6
1.15
14:43
25.0
2.77
8/25/2009
0.0
13:35
24.2
5.15
9:12
24.4
7.68
13:44
24.2
3.14
13:54
24.5
3.50
14:05
26.3
3.61
14:23
26.5
2.61
14:33
22.4
2.20
14:44
23.1
2.57
8/27/2009
0.0
13.39
24.6
5.33
8:51
24.4
7.80
13:48
23.9
3.18
13:52
24.4
3.34
13:57
27.5
3.36
14:08
27.0
2.45
14:17
23.6
1.86
14:22
23.7
2.59
Color Coded Stream
Discription
clear water
Slightly Turbid
Turbid
Very Turbid
Muddy
Very Muddy
A _ 7.-7)
0 hru 5 NTU
11 thru 20 NTU
21 thru 50 NTU
50 thru 100 NTU
> 100 NTU
6 thru 10 NTU
004 s n : t n = t?
n-')a.
TEMPERATURE AND DO MONITORING FOR 12-MILE CREEK
aZ
Page 2
'/
Collection Points
N.C. UPSTREAM 6
Shannon DR. 3/4 mile
Off of Waxhaw Indian
Trail Rd. at SR-
1328 Bridge
N.C. UPSTREAM 7
Billy Howie Rd
Between Pleasant
Grove Rd. and New
Town Rd.at SR-
1329 Bridge
N.C. UPSTREAM 8
Chamberwood Rd.
2/10 of a Mile off
New Town Rd.
at SR-1336 Bridge
N.C. UPSTREAM 9
S. Potters Rd. 1/4 Mile
from New Town Rd. at
SR-1162 Bridge
N.C. UPSTREAM 10 S.
Potters Rd. Between
New Town Rd. and NO
84 at SR-1162
Bridge
N.C. UPSTREAM 11
Bridge on NC-84
1/2 Mile from
S. Potters Rd.
N.C. UPSTREAM 12
Bridge on NC-84
1 1/2 Miles from S.
Potters Rd.
12. Mile Creek or
Tributary
TRIBUTARY
TRIBUTARY
TRIBUTARY
TRIBUTARY
12 Mile Creek
12 Mile Creek
TRIBUTARY
GPS
Location
RAIN
FALL
(X) 1490982.562517
(Y) 447487.550008
(X) 1495249.418332
(Y) 450548.909618
(X) 1496066.100757
(Y) 453952.839138
(X) 1502318.142066
(Y) 452322.647899
(X) 1501052.866603
(Y) 457654.412556
(X) 1502551.010019
(Y) 461182.267284
(X) 1507402.291668
(Y) 459665.611535
Dates
AMOUNTS
TIME
TEMP.
DO
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
8/6/2009
0.4
15:37
23.8
3.27
15:46
24.4
4.84
15:51
24.2
6.28
15:58
24.8
3.42
16:05
24.8
3.47
16:12
24.6
4.07
16:17
24.0
3.35
8/11/2009
0.0
14:23
24.2
1.90
14:30
28.0
6.17
14:35
25.5
5.02
14:40
26.8
4.64
14:44
23.8
2.81
14:50
25.7
3.63
14:54
24.9
3.42
8/13/2009
0.0
15:00
22.8
2.88
15:07
24.2
5.83
15:11
22.9
5.57
15:17
23.4
3.55
15:21
22.5
2.86
15:27
23.3
3.38
15:33
23.5
2.58
8/18/2009
0.0
14:33
23.1
1.91
14:42
26.4
7.29
14:48
24.5
4.31
15:02
23.8
3.88
15:02
23.8
3.88
15:08
25.1
3.91
15:14
24.0
3.09
8/20/2009
0.0
14:47
24.0
2.09
14:55
26.7
7.68
15:00
25.2
5.11
15:08
25.9
4.52
15:14
23.2
2.21
15:20
25.0
4.21
15:26
24.9
3.29
8/25/2009
0.0
14:50
22.2
0.96
15:01
24.7
6.93
15:11
23.2
4.85
15:22
24.3
3.99
15:35
22.7
3.15
15:46
23.3
3.52
15:54
23.7
2.49
8/27/2009
0.0
14:25
22.7
1.41
14:33
25.2
6.18
14:38
23.2
3.20
14:47
24.4
3.22
14:52
23.6
3.15
15:00
23.5
3.37
15:05
23.3
2.50

Belnick, Tom
ow !iii/tl,CothL, j Noli
From: Hood, Donna
Sent: Wednesday, August 12, 2009 5:38 PM
To: Belnick, Tom
Cc: Bell, Wes; Krebs, Rob; Allocco, Marcia; Sledge, Bob
Subject: 12 Mile WWTP stream DO monitoring
Attachments: 12-MILE MONITORING May thru August 4th.xls
Good Morning Tom,
Thank you for sparing some time Tuesday afternoon. I have attached the updated spreadsheet that Mark Tye usually
sends as well as added a few pages with our info. Below is the brief synopsis of our findings.
General observations:
1. Sampling locations are on the downstream side of the bridge for continuity.
2. Some sampling locations are not in the thalwag of the stream.
3. The DO probe was not oscillated while sampling unmoving pools of water.
4. The DO probe sometimes rested on the bottom of the stream as opposed to being suspended in the water
column.
5. Turbidity was analyzed by a lab in the beginning; however, now the results are estimated by sight only.
6. The downstream site for this study (1/4 mile downstream of the discharge) may or may not be at the effluent
d.o. sag point.
7. Not all sampling points are for the main stem of 12 mile, some data points are from unnamed tribs.
8. Most sampling stations had slow moving water.
Specific comments to sampling locales (as visited) are as follows:
• DS-1 (downstream 1)-Waxhaw Marvin Rd -may not be at the do sag point
• US-1 (upstream 1)-Hwy 16-samples not in the thalwag of the stream; also DWQ ambient monitoring site
• US-2 (upstream 2)-Cuthbertson Rd -only sampling point for the west fork of 12 mile
• US-3 (upstream 3)-Howie Mine Rd-trib of the east fork of 12 mile -DO taken from 'puddles' with
virtually no flow as the stream undergrounds in several places
• US-4 (upstream 4)-Indian Trail-Waxhaw Rd -East Fork 12 Mile
• US-5 (upstream 5)-Shannon Dr. -East Fork 12 Mile
• US-6 (upstream 6)-Shannon Dr. ut to East fork of 12 Mile
• US-7 (upstream 7)-Billy Howie Rd.-ut to east Fork of 12 Mile
• US-8 (upstream 8)-Chambwood Rd- ut to East Fork of 12 Mile
• US-9 (upstream 9)-Potter Rd- ut to East Fork of 12 Mile
• US-10 (upstream 10)-Potter Rd- East Fork of 12 Mile
• US-11 (upstream 11)-Hwy 84- East Fork of 12 Mile
• US-12 (upstream 12)-Hwy 84- ut to East Fork of 12 Mile
I hope this helps. I will schedule another visit with them to observe sampling during the afternoon hours. If
you have any questions, please do not hesitate to call.
Thank you,
Donna
1

TEMPERATURE AND DO MONITORING FOR 12-MILE CREEK
Page 1
Collection Points
N.C. DOWNSTREAM 1
1/4 Mile Below Plant
Discharge at SR-1301
Bridge
I
12-MILE PLANT
N.C. UPSTREAM 1
1/4 Mile Above Plant
Discharge at NC-16
Bridge
N.C. UPSTREAM 2
Cuthbertson Rd. 1/4
Mile off NC-16 at
SR-1321 Bridge
N.C. UPSTREAM 3
Howie Mine Rd. 3/4
Mile from NC-16 At SR
1008 Bridge
N.C. UPSTREAM 4
Waxhaw - Indian Trail
Rd. between New
Town Rd. and NC-16 at
SR-1008 Bridge
N.C. UPSTREAM 5
Shannon DR. 1/4 mile
Off of Waxhaw-Indian
Trail Rd. at SR -
1328 Bridge
12-Mile Creek or
Tributary
12 Mile Creek
12 Mile Creek
12 Mile Creek
TRIBUTARY
TRIBUTARY
12 Mile Creek
12 Mile Creek
GPS
Locations
RAIN
FALL
(X) 1468992.770238
(Y) 439563.400324
CASCADE
(X) 1473859.526891
(Y) 442224.933192
(X) 1475111.812431
(Y) 444086.541596
(X) 1481608.866568
(Y) 435043.905916
(X) 1487551.071974
(Y) 446145.271539
(X) 1490029.493469
(Y) 448324.357226
Dates
AMOUNTS
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
5/14/2009
0.0
10:00
17.1
6.53
9:19
19.2
8.11
10:11
16.6
6.46
10:34
16.7
7.73
10:50
16.2
6.60
11:00
16.4
5.94
11:05
16.6
6.33
5/15/2009
0.0
7:40
18.5
6.85
9:07
20.1
7.78
7:50
17.7
6.12
8:00
18.0
6.81
8:17
17.3
6.32
8:25
17.5
6.00
8:30
17.6
5.80
5/18/2009
0.4
9:48
16.6
6.96
9:12
20.0
8.90
10:00
16.3
6.98
10:12
16.1
/.94
10:12
16.1
7.94
10:50
14.7
8.10
10:59
15.8
6.94
5/20/2009
0.0
9:28
15.1
7.58
8:45
18.2
8.90
9:41
14.3
7.48
9:49
14.6
7.29
10:06
13.8
6.85
10:15
14.1
7.14
10:23
14.3
7.28
5/22/2009
0.0
8:57
17.8
6.32
8:47
19.7
8.40
9:08
16.7
7.00
9:18
16.9
7.15
9:36
16.5
5.79
9:45
16.5
6.28
9:51
16.7
6.30
5/26/2009
1.0
10:00
20.5
7.29
9:42
21.2
8.40
10:11
20.5
5.49
10:19
21.5
7.50
10:34
19.3
6.75
10:39
20.1
6.94
10:47
20.1
6.90
5/27/2009
0.0
9:41
20.8
6.52
9:28
19.6
8.67
9:49
20.9
5.42
9:55
21.9
5.71
10:20
20.3
5.82
10:37
20.4
5.95
10:50
20.5
6.19
5/29/2009
0.8
9:20
20.5
6.79
8:46
21.2
8.60
9:29
20.6
5.69
9:40
20.7
7.63
9:54
19.9
7.30
10:01
20.4
6.00
10:06
20.2
7.01
6/1/2009
0.0
9:45
20.2
5.60
9:22
21.0
8.96
9:57
20.3
5.13
10:05
20.1
7.51
10:20
19.5
5.36
10:32
19.9
4.32
10:37
19.9
5.72
6/3/2009
0.0
9:27
21.3
4.69
9:13
21.3
8.90
9:34
21.0
4.84
9:50
21.1
6.84
10:04
20.8
4.58
10:13
20.9
3.43
10:21
20.9
5.27
6/5/2009
1.2
9:01
21.2
6.83
8:44
21.2
8.96
9:10
20.9
6.13
9:18
20.9
7.54
9:33
20.0
6.57
9:40
20.5
6.73
9:46
20.7
6.83
6/8/2009
0.0
10:07
20.9
6.98
9:08
21.3
8.90
10:18
21.1
5.82
10:27
21.1
7.79
10:43
20.4
5.52
10:51
20.5
5.86
10:57
20.4
6.43
6/10/2009
0.0
9:37
21.8
7.26
8:41
22.0
9.45
9:44
21.6
6.07
10:07
21.8
8.19
10:27
21.3
4.68
10:38
21.5
5.98
10:47
21.5
6.11
6/12/2009
0.2
9:00
21.3
7.45
8:30
22.1
8.95
9:12
21.3
7.46
9:22
21.4
8.48
9:38
20.2
5.69
9:46
20.8
7.30
9:54
20.9
7.91
6/16/2009
0.0
8:55
22.4
5.63
8:41
22.6
7.86
9:04
22.0
5.73
9:13
22.2.
6.20
9:28
21.9
3.13
9:38
21.9
4.66
9:50
22.1
4.57
6/18/2009
0.2
9:20
21.6
6.24
8:49
22.5
7.94
9:40
21.6
5.80
9:30
21.6
7.38
9:55
21.9
5.71
10:02
21.4
5.50
10:08
21.4
6.67
6/23/2009
0.0
9:20
22.5
5.21
8:58
23.0
7.70
9:34
22.3
5.22
9:40
22.4.
6.21
10:08
21.4
3.23
10:16
22.3
3.53
10:23
22.3
4.30
6/25/2009
0.0
9:16
22.4
5.55
9:03
22.8
8.35
9:24
21.9
5.47
9:32
21.9
6.08
9:43
21.5
2.86
9:51
22.0
4.14
9:56
22.1
4.24
6/30/2009
0.0
10:20
22.1
5.51
9:20
23.0
7.84
10:31
21.6
5.79
10:10
21.7
6.36
10:51
20.7
2.64
10:58
21.2
3.90
11:04
21.8
3.15
7/2/2009
0.0
11:27
22.5
5.68
7:30
23.0
7.52
11:19
22.8
5.93
10:46
22.6
5.34
10:32
21.0
2.88
10:25
21.4
3.25
10:21
21.9
3.28
7/7/2009
0.0
9:24
22.9
3.99
9:03
23.8
7.57
9:43
22.7
3.17
9:52
22.7
4.73
10:13
22.2
2.47
10:21
21.9
2.72
10:26
22.2
2.77
7/9/2009
0.1
9:41
22.3
/ 4.66
9:02
23.0
7.70
9:49
21.3
4.60
9:59
21.4
3.89
10:17
20.3
3.07
10:25
21.1
3.92
10:32
21.5
2.85
7/14/2009
0.0
9:28
22.8
4.09
8:52
23.3
8.33
9:39
22.4
4.20
9:46
22.3
5.32
10:03
21.3
2.35
10:11
21.9
2.46
10:16
22.1
2.34
7/16/2009
0.0
9:09
22.9
4.94
8:47
23.4
7.85
9:16
22.8
4.24
9:27
22.8
4.62
9:45
22.3
2.56
9:52
22.2
2.45
9:57
22.6
2.43
7/21/2009
1.8
8:55
20.3
7.00
8:46
22.9
8.35
9:03
20.1
5.85
9:10
20.3
7.74
9:20
19.1
8.05
9:27
20.1
6.27
9:35
20.6
6.30
Color Coded Stream
Discription
clear water
Slightly Turbid
Turbid
Very Turbid
Muddy
Very Muddy
> 100 NTU
0 thru 5 NTU
6 thru 10 NTU
11 hru 20 NTU
21 thru 50 NTU
50 thru 100 NTU
TEMPERATURE AND DO MONITORING FOR 12-MILE CREEK
Page 2
N.C. UPSTREAM 7
N.C. UPSTREAM 6
Billy Howie Rd
N.C. UPSTREAM 8
N.C. UPSTREAM 10 S.
Collection Points
Shannon DR. 3/4 mile
Between Pleasant
Charnberwood Rd.
N.C. UPSTREAM 9
Potters Rd. Between
N.C. UPSTREAM 11
N.C. UPSTREAM 12
Off of Waxhaw Indian
Grove Rd. and New
2/10 of a Mile off
S. Potters Rd. 1/4 Mile
New Town Rd. and NC-
Bridge on NC-84
Bridge on NC-84
Trail Rd. at SR-
Town Rd.at SR-
New Town Rd.
from New Town Rd. at
84 at SR-1162
1/2 Mile from
1 1/2 Miles from S.
1328 Bridge
1329 Bridge
at SR-1336 Bridge
SR-1162 Bridge
Bridge
S. Potters Rd.
Potters Rd.

12-Mlle Creek or
Tributary
TRIBUTARY
TRIBUTARY
TRIBUTARY
TRIBUTARY
12 Mile Creek
12 Mile Creek
TRIBUTARY
GPS
Locations
RAIN
FALL
(X) 1490982.562517
(Y) 447487.550008
(X) 1495249.418332
(Y) 450548.909618
(X) 1496066.100757
(Y) 453952.839138
(X) 1502318.142066
(Y) 462322.647899
(X) 1501052.866603
(V) 457654.412556
(X) 1502551.010019
(Y) 461182.267284
(X) 1507402.291668
(Y) 459665.611535
Dates
AMOUNTS
TIME
TEMP.
DO
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
5/14/2009
0.0
11:11
16.3
5.95
11:30
17.4
6.22
11:38
16.7
6.95
11:52
17.2
4.61
11:58
16.9
3.20
12:06
17.3
4.42
12:15
17.6
2.67
3.45
6.42
5/15/2009
5/18/2009
0.0
0.4
11:09
16.3
6.10
11:21
5.86
8:52
11:28
17.4
15.5
6.55
7.15
9:00
11:39
17.4
15.8
4.55
6.15
9:05
11:45
16.9
16.3
3.80
3.83
9:14
11:53
18.6
15.9
4.21
7.02
9:20
12:02
17.9
15.7
16.4
6.93
5/20/2009
0.0
28
14.1
6.05
10:38
14.6
7.40
10:48
14.3
7.29
10:54
14.1
5.65
11:01
14.6
4.64
11:09
15.5
5.73
1:16
15.5
4.71
5/22/2009
0.0
:55
16.2
5.85
6.00
10:12
17.0
7.22
10:20
17.6
4.21
10:26
17.1
3.76
10:32
17.9
5.31
'10:40
;,_17.6
2.89
5/26/2009
1.0
10:52
20.6
6.69
11:01
20.1
6.75
11:06
19.8
6.96
11:14
20.5
6.13
11:20
20.9
3.25
11:27
21.5
5.23
11:39
21.1
5.42
5/27/2009
0.0
10:56
20.5
5.85
11:08
20.8
5.37
11:15
20.3
6.34
11:27
20.3
4.97
11:32
21.0
4.48
11:38
21.5
4.10
11:46
20.9
4.10
5/29/2009
0.8
10:08
20.3
7.59
10:17
20.3
6.81
6‘-
` o `
11`8.08
10:33
20.3
5.08
10:38
21.1
4.79
10:46
21.0
5.76
10:51
20.9
4.89
6/1/2009
0.0
10:50
20.2
5.34
'1:56
19.9
6.37
11:05
19.8
3.68
11:10
19.8
3.75
11:19
21.4
4.08
6/3/2009
0.0
" 0:39
20.8
5.89
.426%1
` a.. '.a
..
e; a. ,
0.,e;;
;, g11:
11:00
22.3
3.10
11:06
21.0
4.58
6/5/2009
1.2
9:50
20.3
4.77
9:58
20.8
7.20
10:04
20.7
6.88
10:13
20.2
5.16
10:19
21.1
5.63
10:25
21.3
5.79
10:31
20.8
5.42
6/8/2009
0.0
:01
20.2
5.55 .
11:11
21.1
5.65
11:17
20.9
6.24
11:27
20.4
4.89
11:34
21.6
4.00
11:45
21.7
3.36
e1:48
20.6
4.46
6/10/2009
0.0
:51
21.1
5.49
6.15
11:08
21.5
6.68
11:16
21.6
3.81
11:22
21.2
4.0D
11:32
22.7
3.91
11:49
21.0
4.89
6/12/2009
0.2
9:58
20.8
6.18
10:06
21.0
7.26
10:12
21.4
7.12
10:22
20.9
4.78
10:3.1
22.0
5.61
10:40
21.0
5.98
10:47
22.0
3.89
6/16/2009
0.0
_:55
21.6
4.49
a.e.:..
:.,ye,; -
21.7
, 0v
6.32
- a a
10:26
'n ,
21.4
s:,.,..
ra.,_
ci=,
e;_L,4
10:38
22.6
3.37
6/18/2009
0.2
i:0:12
21.2
4.89
10:20
6.50
10:34
21.1
4.92
10:38
22.4
5.18
10:46
22.6
6.51
10:52
22.5
5.23
6/23/2009
0.0
10:30
21.9
3.96
10:41
22.7
3.91
10:47
22.3
4.31
10:54
22.2
3.73
10:59
21.9
2.43
11:04
23.7
2.78
11:10
21.6
3.20
6/25/2009
0.0
0:01
21.6
4.11
10:08
22.3
3.60
10:15
21.6
5.62
10:24
22.4
3.95
10:31
21.4
2.82
10:40'
23.4
..
.
. -
6/30/2009
0.0
i1:09
21.3
4.87
11:17
23,1
3.87
11:24
21.6
5.14
11:31
21.9
3.39
11:35
21.2
3.08
11:40
22.5
2.86
11:45
21.2
2.33
7/2/2009
0.0
0:15
21.4
3.96
-
-
9:59
21.7
3.69
9:52
21.2
3.23
9:45
22.1
4.58
9:40
22.2
2.58
7/7/2009
0.0
i`v:00,,
2241;
_ 347.a
10:39
22.5
3.31
10:46
22.7
3.74
' 10:58
21.9
3.32
11:03
21.7
2.71
11:10
22.5
3.27
11:16
22.7
2.48
7/9/2009
0.1
10:36
21.3
3.76
10:45
21.6
3.12
10:52
21.0
3.83
11:00
21.0
3.60
11:07
21.3
2.21
11:14
21.5
2.49
11:20
21.9
2.06
7/14/2009
0.0
10:21
21.6
3.85
10:28
22.7
3.07
10:34
21.4
4.01
10:43
21.9
4.04
10:47
21.6
3.67
10:53
22.0
3.52
11:00
22.0
2.37
7/16/2009
0.0
10:01
22.1
3.51
10:12
23.2
3.99
10:18
22.2
4.80
10:26
23.0
4.21
10:32
22.8
3.37
10:39
22.5
3.12
10:46
22.6
2.26
7/21/2009
1.8
9:38
20.3
5.40
9:45
20.7
4.65
9:51
20.3
5.44
9:58
20.5
4.51
10:02
20.6
3.95
10:08
21.0
3.76
10:15
21.1
1.56
Color Coded Stream
Discription
clear water
hru 5 NTU
_
Slightly Turbid
10 NTU
Tu bid
thru 20 NTU
- Very Turbid
thru 50 NTU
Muddy
100 NTU
Very Muddy
100 NTU
0
6 thru
11
21
50 thru
>

7/9g ram/ jn,' eon', JZ f 1,'le — Qo ga/I 0'
Belnick, Tom
—,'o Q�ki /MI alib44(
From: [e-mail]
Sent: Friday, July 31, 2009 10:02 AM
To: Belnick, Tom
Cc: [e-mail]
Subject: RE: 12-Mile Creek Monitoring
Good Friday morning Tom. I attempted to send you an e-mail earlier in the week - not sure if it made it
to you. To recap:
• we will extend Twelve Mile Creek monitoring through August
• our WWTP Super is contacting Donna Hood to set field visit
Over the past few days I have attempted to send you nine (9) word documents with pictures imbedded in
them. Please confirm you have received 9 sets of 12 Mile Creek pictures.
Thanks and have a great weekend.
Mark Tye
Assistant Public Works Director
(phone) 704 296-4215
(fax) 704 296-4232
"Belnick, Tom" <tom.belnick(ftcdenr.gov> wrote:
To: "MTye©co.union.nc.us" <MTye(aco.union.nc.us>
From: "Belnick, Tom" <tom.belnickCa0ncdenr.gov>
Date: 07/29/2009 04:15PM
Subject: RE: 12-Mile Creek Monitoring
Mark- just left a voice message with you but ran out of space. Was wondering if you can extend the monitoring
through August, so we can get a complete picture of critical summer low flows. Donna Hood with our Mooresville
Region would also like to attend one of the sampling events. This data will be used to justify any future course of
action. If you give me a call, I can go over some of this. Thanks for your efforts.
Tom Belnick
Supervisor, NPDES West Program
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
1

E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
From: [e-mail] [mailto:[e-mail]]
Sent: Monday, July 27, 2009 4:48 PM
To: Belnick, Tom
Cc: [e-mail]; [e-mail]; [e-mail]
Subject: Fw: 12-Mile Creek Monitoring
Good afternoon Tom. Please find the most up to date Twelve Mile Creek (Union County, NC) in -stream
monitoring data attached. As a reminder the rainfall data is unofficial and the cell colors denote turbidity
ranges (see bottom of sheet).
I have a picture file to send you. It is kind if big so I might have to break it up.
Let me know if/when your Biologist wants to come down. We plan to sample this Tues and Thurs and
then discontinue the efforts unless there is a compelling reason to continue.
Mark Tye
Assistant Public Works Director
(phone) 704 296-4215
(fax) 704 296-4232
Forwarded by Mark Tye/UnionCounty on 07/27/2009 04:37PM
To: Mark Tye/UnionCounty@UnionCounty
From: ucwwtp/UnionCounty
Date: 07/21/2009 04:35PM
cc: John Hahn/UnionCounty@UnionCounty
Subject: 12-Mile Creek Monitoring
Mark:
Here is the most up-to-date monitoring report for 12-Mile Creek from May 14, 2009 through today.
The rainfall amounts were taken from our 12-Mile Creek Wastewater Plant. Due to the variations in
summer storms the rainfall amounts may vary (< or >) throughout the sample locations.
Thanks,
Nelson Baker
Lab Coordinator
2

Belnick, Tom
From: [e-mail]
Sent: Monday, July 27, 2009 4:48 PM
To: Belnick, Tom
Cc: [e-mail]; [e-mail]; [e-mail]
Subject: Fw: 12-Mile Creek Monitoring
Attachments: 12-MILE MONITRING.xls
Good afternoon Tom. Please find the most up to date Twelve Mile Creek (Union County, NC) in -stream
monitoring data attached. As a reminder the rainfall data is unofficial and the cell colors denote turbidity
ranges (see bottom of sheet).
I have a picture file to send you. It is kind if big so I might have to break it up.
Let me know if/when your Biologist wants to come down. We plan to sample this Tues and Thurs and
then discontinue the efforts unless there is a compelling reason to continue.
Mark Tye
Assistant Public Works Director
(phone) 704 296-4215
(fax) 704 296-4232
Forwarded by Mark Tye/UnionCounty on 07/27/2009 04:37PM
To: Mark Tye/UnionCounty@UnionCounty
From: ucwwtp/UnionCounty
Date: 07/21/2009 04:35PM
cc: John Hahn/UnionCounty@UnionCounty
Subject: 12-Mile Creek Monitoring
Mark:
Here is the most up-to-date monitoring report for 12-Mile Creek from May 14, 2009 through today.
The rainfall amounts were taken from our 12-Mile Creek Wastewater Plant. Due to the variations in
summer storms the rainfall amounts may vary (< or >) throughout the sample locations.
Pig bits Jwi,k3
SOPA
1YptfOe coo4ovvn:)(
-@pA p
jQMoAM
Thanks,
Nelson Baker
Lab Coordinator
1

U4tbt awn cl/t 2 '• 11 IQ
'Belnick, Tom
From: Belnick, Tom
Sent: Wednesday, July 22, 2009 11:14 AM
To: Caldwell, Peter; Krebs, Rob
Cc: Poupart, Jeff
Subject: RE: More Twelve Mile Creek photos
Rob/Pete- I'll leave it up to you's to determine who will attend. Please call Mark Tye with Union County (704/296-4215)
to arrange a schedule date. Once again, I'd like to get confirmation that the DO monitoring data is being collected
appropriately, and whether there are any indications of smoking guns (poultry operations, cattle in stream, etc) at low
instream DO segments upstream of the WWTP discharge. If low upstream DOs appears natural, there is a possibility
that DWQ would consider an expansion, provided certain conditions are met. But if low upstream DOs appear due to
some upstream activities, then this would need to be resolved before an expansion would be considered. So there is a
lot riding on the DO sampling. Thanks for the help!
Tom Belnick
Supervisor, NPDES West Program
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
From: Caldwell, Peter
Sent: Wednesday, July 22, 2009 10:21 AM
To: Belnick, Tom; Krebs, Rob
Subject: RE: More Twelve Mile Creek photos
I can definitely have someone attend unless you've got it covered Rob. Just let me know.
Pete
From: Hood, Donna
Sent: Tuesday, July 21, 2009 12:42 PM
To: Caldwell, Peter; Belnick, Tom
Cc: Krebs, Rob
Subject: RE: More Twelve Mile Creek photos
Good afternoon,
can go. Let me know when.
Donna
From: Krebs, Rob
Sent: Tuesday, July 21, 2009 2:46 PM
To: Hood, Donna
Subject: FW: More Twelve Mile Creek photos
1

r
Donna,
As the Union Co rep are you interested? Marcia?
Rob
From: Belnick, Tom
Sent: Tuesday, July 21, 2009 2:41 PM
To: Caldwell, Peter
Cc: Krebs, Rob
Subject: FW: More Twelve Mile Creek photos
Hi Pete- is there anyone from your staff that might be able to attend one of these sampling episodes in Union County?
Ultimately a decision will need to be made as to whether low instream DO's are naturally occuring, and I'd like someone
with good field experience to tag along, compare DOs, and just see the sampling areas. Union County is asking for an
expansion at 12 Mile Creek WWTP and DWQ has expressed concerns about the low upstream DO, but so far no
upstream sources of high BOD loading have been identified.
Rob- not sure if someone from MRO might also want to join in.
Tom Belnick
Supervisor, NPDES West Program
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may
disclosed to third parties.
From: [e-mail] [mailto:[e-mail]]
Sent: Tuesday, July 21, 2009 2:22 PM
To: Belnick, Tom
Cc: [e-mail]; [e-mail]; [e-mail]
Subject: RE: More Twelve Mile Creek photos
Good afternoon Tom. Sorry to be slow getting back to you. I have some additional info coming your way
in the next day or so. Good pictures of debris between sample points (staff is "walking" creek form
upstream near Hwy 84 down toward WWTP). Up to date data will be included. We would be glad for one
of your folks to come spend some time with us. We are sampling Tuesday and Thursdays. We leave the
12 Mile WWTP between 9:30 and 10:00. Round trip takes about 2 hours.
Mark Tye
Assistant Public Works Director
(phone) 704 296-4215
(fax) 704 296-4232
"Belnick, Tom" <[e-mail]> wrote:
To: "[e-mail]" <[e-mail]>
From: "Belnick, Tom" <[e-mail]>
Date: 07/21/2009 01:33PM
Subject: RE: More Twelve Mile Creek photos
Hi Mark- I'd like to get one of our DWQ folks out there with your staff during one of your DO stream samplings, to get a
better sense of the area. Can you let me know the schedule. Thanks.
2

. o
Tom Belnick
Supervisor, NPDES West Program
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
From: [e-mail] [mailto:[e-mail]]
Sent: Thursday, July 09, 2009 11:44 AM
To: [e-mail]; [e-mail]; [e-mail]; [e-mail];
[e-mail]
Cc: [e-mail]; [e-mail]; [e-mail]
Subject: Fw: More Twelve Mile Creek photos
Good morning all. Please find a few more pics of existing conditions at two (2) of our stream sampling
points. I will have more detailed information headed your way soon. Staff is walking the vast majority of
12 Mile and documenting conditions. In the near future I will have a map for you with picture, field notes
and location of points of concern. I will also be providing up to date sampling data.
Mark Tye
Assistant Public Works Director
(phone) 704 296-4215
(fax) 704 296-4232
Forwarded by Mark Tye/UnionCounty on 07/09/2009 11:22AM
To: Mark Tye/UnionCounty@UnionCounty
From: John Hahn/UnionCounty
Date: 07/07/2009 01:29PM
Subject: More Twelve Mile Creek photos
Mark,
Please find attached photos taken of Twelve Mile Creek.
Photos MVC 030S through MVC 033S are from Upstream sampling location US-5 (along Shannon Drive
just off of Waxhaw-Indian Trail Rd.). The cuttings in the stream are from NC -DOT Right -of -Way cuttings
which occurred on June 23rd, 2009.
3

Photos MVC 034S through MVC 037S are from upstream side of Downstream I (DS-I) location (Kensington •
Drive bridge). As you are facing upstream, the right side of the stream is blocked by a single tree which
has accumulated some debris and spans over half way across the stream. The remainder of the stream is
blocked by random "weavings" of debris. Flow/turbulence downstream of this point was insufficient to
move a floating leaf during the time of observation on July 7th, 2009.
Please advise if attachments "viewed" OK.
Thanks,
John
4

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E(Icigt 01, tdia"i

15A NCAC 02B .0204 LOCATION OF SAMPLING SITES AND MIXING ZONES
(a) Location of Sampling Sites: in conducting tests or making analytical determinations of classified waters to determine
conformity or nonconformity with the established standards, samples shall be collected outside the limits of prescribed mixing
zones. However, where appropriate, samples shall be collected within the mixing zone in order to ensure compliance with
in -zone water quality requirements as outlined in Paragraph (b) of this Rule.
(b) Mixing Zones: a mixing zone may be established in the area of a discharge in order to provide reasonable opportunity for
the mixture of the wastewater with the receiving waters. Water quality standards shall not apply within regions defined as
mixing zones, except that such zones shall be subject to the conditions established in accordance with this Rule. The limits of
such mixing zones shall be defined by the division on a case -by -case basis after consideration of the magnitude and character
of the waste discharge and the size and character of the receiving waters. Mixing zones shall be determined such that
discharges shall not:
(1) result in acute toxicity to aquatic life [as defined by Rule .0202(I) of this Section] or prevent free passage of
aquatic organisms around the mixing zone;
(2) result in offensive conditions; _
(3) produce undesirable aquatic life or result in a dominance of nuisance species outside of the assigned nixing
zone; or
(4) endanger the public health or welfare.
In addition, a mixing zone shall not be assigned for point source discharges of fecal coliform organisms in waters classified
"WS-II," "WS-III," "B," or "SA". Mixing zones shall not be assigned for point source discharges of enterococci in waters
classified "SB" or "SA". For the discharge of heated wastewater, compliance with federal rules and regulations pursuant to
Section 316(a) of the Federal Water Pollution Control Act, as amended, shall constitute compliance with Subparagraph (b) of
this Rule.
History Note: Authority G.S. 143-214.1;
Eff. February 1, 1976;
Amended Eff. May 1, 2007; October 1, 1989; February 1, 1986; September 9, 1979.
15A NCAC 02B .0205 NATURAL CHARACTERISTICS OUTSIDE STANDARDS LIMITS
Natural waters may on occasion, or temporarily, have characteristics outside of the normal range established by the standards.
The adopted water quality standards relate to the condition of waters as affected by the discharge of sewage, industrial wastes
or other wastes including those from nonpoint sources and other sources of water pollution. Water quality standards will not
be considered violated when values outside the normal range are caused by natural conditions. Where wastes are discharged to
such waters, the discharger will not be considered a contributor to substandard conditions provided maximum treatment in
compliance with permit requirements is maintained and, therefore, meeting the established limits is beyond the discharger's
control.
History Note: Authority G.S. 143-214.1; 143-215.3(a)(1);
Eff. February 1, 1976;
Amended Eff October 1, 1989; January 1, 1985.
NORTH CAROLINAADMINISTRATIVE CODE
Eff May 1, 2007 Pa2e 17

UVIV`14 e 611r 1t 7109
,Belnick, Tom
From: [e-mail]
Sent: Thursday, July 09, 2009 11:44 AM
To: [e-mail]; [e-mail]; [e-mail];
[e-mail]; [e-mail]
Cc: [e-mail]; [e-mail]; [e-mail]
Subject: Fw: More Twelve Mile Creek photos
Attachments: MVC-037S.JPG; MVC-031S.JPG; MVC-032S.JPG; MVC-033S.JPG; MVC-034S.JPG;
MVC-036S.JPG; MVC-030S.JPG
Good morning all. Please find a few more pics of existing conditions at two (2) of our stream sampling
points. I will have more detailed information headed your way soon. Staff is walking the vast majority of
12 Mile and documenting conditions. In the near future I will have a map for you with picture, field notes
and location of points of concern. I will also be providing up to date sampling data.
Mark Tye
Assistant Public Works Director
(phone) 704 296-4215
(fax) 704 296-4232
Forwarded by Mark Tye/UnionCounty on 07/09/2009 11:22AM
To: Mark Tye/UnionCounty@UnionCounty
From: John Hahn/UnionCounty
Date: 07/07/2009 01:29PM
Subject: More Twelve Mile Creek photos
Mark,
Please find attached photos taken of Twelve Mile Creek.
Photos MVC 030S through MVC 0335 are from Upstream sampling location US-5 (along Shannon Drive
just off of Waxhaw-Indian Trail Rd.). The cuttings in the stream are from NC -DOT Right -of -Way cuttings
which occurred on June 23rd, 2009.
Photos MVC 034S through MVC 037S are from upstream side of Downstream I (DS-I) location (Kensington
Drive bridge). As you are facing upstream, the right side of the stream is blocked by a single tree which
has accumulated some debris and spans over half way across the stream. The remainder of the stream is
blocked by random "weavings" of debris. Flow/turbulence downstream of this point was insufficient to
move a floating leaf during the time of observation on July 7th, 2009.
Please advise if attachments "viewed" OK.
Thanks,
John

7fp,
CJ Ji�1t)44&L14'?lir»i
,Belnick, Tom
From: Caldwell, Peter
Sent: Wednesday, July 01, 2009 4:57 PM
To: Belnick, Tom
Cc: Krebs, Rob; Poupart, Jeff
Subject: RE: Union County - Twelve Mile Creek
Hi Tom,
It is hard to say without looking at it, but it is possible that this stream can be naturally low in DO. There are some low
gradient streams out there that are not in the coastal plain that may be subject to low DO issues. Beavers are another
confounding factor. Flows are a big piece of the puzzle...if any more monitoring will be taking place, it would be good to
collect flow data if at all possible.
We would be happy to take a look at it if you need us to, just let me know.
Pete
From: Belnick, Tom
Sent: Tuesday, June 30, 2009 6:36 AM
To: Caldwell, Peter
Cc: Krebs, Rob; Poupart, Jeff
Subject: FW: Union County - Twelve Mile Creek
Hey Pete- I'm forwarding along some instream DO information being collected by Union County in 12 Mile Creek. Short
story- they want to expand at their WWTP, but DWQ said not at this time due to low instream DOs. It now appears the
low DOs might be due to upstream sources (no point sources upstream, but we wondered about any poultry farms,
etc). So we requested Union County to conduct an instream DO recon- which they committed to run through July.
Initial results for May/June show DO values already down to 3 mg/I at some upstream sites, but no smoking guns have
been identified. Question- could this be naturally low instream DOs? This is not eastern swamp territory. This is just an
fyi at this point- but we might request your Unit or MRO to accompany Union County on one of their recon surveys, to
ensure DO values are being measured correctly, and observing field conditions. If you have any ideas at this point let
me know. Thanks.
Tom Belnick
Supervisor, NPDES West Program
NC DENR/Division of Water Quality
1617 Mail Service Center, Raleigh, NC 27699-1617
[phone]; fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
From: [e-mail] [mailto:[e-mail]]
Sent: Wednesday, June 17, 2009 3:03 PM
To: [e-mail]; [e-mail]; [e-mail]; [e-mail];
[e-mail]
Cc: [e-mail]; [e-mail]; [e-mail]
Subject: Union County - Twelve Mile Creek
i

Good Wednesday all. On May 8, 2009 representatives from UCPW, Hazen & Saywer and DWQ had a very
productive meeting concerning the Twelve Mile Creek, Hunley Creek and Fairfield Plantation WWTP's. In
summary :
• DWQ expects the permits for the Hunely Creek and Fairfield Plantation WWTP's to rescended by
request.
• Due to severe capacity limitations at the Twelve Mile Creek WWTP, Union County is not in the
position to request Hunley Creek permit recission at this time. By contractual agreement the
Fairfield permit will soon be assigned to Union County. Due to the same capacity issues Union
County will not be in the position to request recission of that permit.
• It was suggested that if the cause of suppressed DO levels upstream of the Twelve Mile discharge
could be identified there is the real potential for increased discharge to Twelve Mile Creek. If
additional discharge was permitted to Twelve Mile Creek, serious consideration could be given to
requesting recission of the two permits mention above.
In an effort to get discussions as they relate to the DO levies in Twelve Mile started, UCPW initiated some
preliminary sample collection. 13 sampling points along Twelve Mile Creek and/or tributaries were
monitored for DO, Temp and Turbidity 14 times between 5-14-09 and 6-12-09.
Please find the following attached:
• Copy of 12-Mile Monitoring - excel sheet with X and Y coordinants, unofficial rainfall data, DO,
Temp and Turbidity Range (NOTE: Turbidity Range is denoted by cell color - see legend at bottom
of spreadsheet). 1 downstream, WWTP discharge and 12 upstream points are included.
• field observations - a few observations from staff
• pictures of stream locations - view upstream and downstream of each sampling point
• Obsticles - pictures of a few flow obstructions noted during sampling
• Twelve Mile Sample locations - map of sample points.
TD4p to manpowerAmitatiors, we are reducing our sampling schedule from 3 days per weeksto 2.days. We
plan to continue s iplingaising the current stratagy through the month of July. By tha engl of July we
would expect to have some comment and or direction from you as it relates to future activity.
Please take a look at the attached. UCPW would like to ride up and discuss next steps sometime in early
July.
Thanks for you help with these matters.
Mark Tye
Assistant Public Works Director
(phone) 704 296-4215
(fax) 704 296-4232
a
2

)4M6teiniilittrifte if/Me
'Be[nick, Tom
From: [e-mail]
Sent: Wednesday, June 17, 2009 3:03 PM
To: [e-mail]; [e-mail]; [e-mail];
[e-mail]; [e-mail]
Cc: [e-mail]; [e-mail]; [e-mail]
Subject: Union County - Twelve Mile Creek
Attachments: Copy of 12-MILE MONITRING.xls; field observations.doc; Pictures of Stream Locations.doc;
Obstacles of Twelve Mile Creek and Tributaries.doc; TwelveMile Sample Locations.pdf
Good Wednesday all. On May 8, 2009 representatives from UCPW, Hazen & Saywer and DWQ had a very
productive meeting concerning the Twelve Mile Creek, Hunley Creek and Fairfield Plantation WWTP's. In
summary :
• DWQ expects the permits for the Hunely Creek and Fairfield Plantation WWTP's to rescended by
request.
• Due to severe capacity limitations at the Twelve Mile Creek WWTP, Union County is not in the
position to request Hunley Creek permit recission at this time. By contractual agreement the
Fairfield permit will soon be assigned to Union County. Due to the same capacity issues Union
County will not be in the position to request recission of that permit.
• It was suggested that if the cause of suppressed DO levels upstream of the Twelve Mile discharge
could be identified there is the real potential for increased discharge to Twelve Mile Creek. If
additional discharge was permitted to Twelve Mile Creek, serious consideration could be given to
requesting recission of the two permits mention above.
In an effort to get discussions as they relate to the DO levies in Twelve Mile started, UCPW initiated some
preliminary sample collection. 13 sampling points along Twelve Mile Creek and/or tributaries were
monitored for DO, Temp and Turbidity 14 times between 5-14-09 and 6-12-09.
Please find the following attached:
• Copy of 12-Mile Monitoring - excel sheet with X and Y coordinants, unofficial rainfall data, DO,
Temp and Turbidity Range (NOTE: Turbidity Range is denoted by cell color - see legend at bottom
of spreadsheet). 1 downstream, WWTP discharge and 12 upstream points are included.
• field observations - a few observations from staff
• pictures of stream locations - view upstream and downstream of each sampling point
• Obsticles - pictures of a few flow obstructions noted during sampling
• Twelve Mile Sample locations - map of sample points.
Due to manpower limitations, we are reducing our sampling schedule from 3 days per week to 2 days. We
plan to continue sampling using the current stratagy tf hroyg�the month of July. By the end of July we
would expect to have some comment and or direction from you as it relates to future activity.
Please take a look at the attached. UCPW would like to ride up and discuss next steps sometime in early
July.
Thanks for you help with these matters.
Mark Tye
Assistant Public Works Director
(phone) 704 296-4215
(fax) 704 296-4232
re 6-23-09
s) (e? (I'l I- maid) ors fot ha n)
3) al read show 11 K:wQO, 14 fill
5 e afJto /tenth r&D =Z:3 l.�?
� 1 Nib � ©� s F.
(,) v 1 ,>.ct- 4, ,: av4v 7jr

TEMPERATURE AND DO MONITORING FOR 12-MILE CREEK
Page 1
Collection Points
N.C. DOWNSTREAM 1
1/4 Mile Below Plant
Discharge at SR-1301
Bridge
12-MILE PLANT
N.C. UPSTREAM 1
1/4 Mile Above Plant
Discharge at NC-16
Bridge
N.C. UPSTREAM 2
Cuthbertson Rd. 1/4
Mile off NC-16 at
SR-1321 Bridge
N.C. UPSTREAM 3
Howie Mine Rd. 3/4
Mile from NC-16 At SR
1008 Bridge
N.C. UPSTREAM 4
Waxhaw - Indian Trail
Rd. between New
Town Rd. and NC-16
at SR-1008 Bridge
N.C. UPSTREAM 5
Shannon DR. 1/4 mile
Off of Waxhaw-Indian
Trail Rd. at SR -
1328 Bridge
12-Mlle Creek or
Tributary
12 Mile Creek
12 Mile Creek
12 Mile Creek
TRIBUTARY
TRIBUTARY
12 Mile Creek
12 Mile Creek
GPS
Locations
RAIN
FALL
(X) 1468992.770238
(Y) 439563.400324
CASCADE
(X) 1473859.526891
(Y) 442224.933192
(X) 1475111.812431
(Y) 444086.541596
(X) 1481608.866568
(Y) 435043.905916
(X) 1487551.071974
(Y) 446145.271539
(X) 1490029.493469
(Y) 448324.357226
Dates
AMOUNTS
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
DO
5/14/2009
0.0
9:19
19.2
8.11
8:00
18.0
6.81
10:50
16.2
6.60
7117007
r"f : 1. -
"F5`94
u :
.
8:17
17.3
6.32
s 8:25
17.5
6.00
8:30
17.6
5.80
9:07
20.1
7.78
5/15/2009
0.0
5/18/2009
0.4
9:48
16.6
6.96
9:12
20.0
8.90
10:00
16.3
6.98
10:12
16.1
7.94
10:12
16.1
7.94
10:50
14.7
8.10
10:59
15.8
6.94
5/20/2009
0.0
8:45
18.2
8.90
c.
,.. ,, _
=1
10:06
13.8
6.85
10:15
14.1
7.14
10:23
14.3
7.28
5/22/2009
0.0
' 8:57
17.8
6.32
8:47
19.7
8.40
9:08
16.7
7.00
9:18
16.9
7.15 ;
9:36
16.5
5.79
9:45
16.5
6.28
9:51
16.7
6.30
5/26/2009
1.0
10:00
20.5
7.29
9:42
21.2
8.40
10:11
20.5
5.49
10:19
21.5
7.50
10:34
19.3
6.75
10:39
20.1
6.94
10:47
20.1
6.90
5/27/2009
0.0
9:41
20.8
6.52
9:28
19.6
8.67
9:49
20.9
5.42
10:00
21.3
7.55
10:20
20.3
5.82
10:37
20.4
5.95
10:50
20.5
6.19
5/29/2009
0.8
9:20
20.5
6.79
8:46
21.2
8.60
9:29
20.6
5.69
9:40
20.7
7.63
9:54
19.9
7.30
10:01
20.4
10:06
20.2
7.01
6/1/2009
0.0
9:45
20.2
9:22
21.0
8.96
9.57
20.3
5.13
10:05
20.1
7.51
10:20
19.5
5.36.
10:32
19.9
4.32
10:37
19.9
5.72
6/3/2009
0.0
9:13
21.3
8.90
9:34
21.0
( 4.84
9:50
21.1
6.84
10:04
20.8
8 .
10:13
20.9
3.43
10:21
20.9
5.27
6/5/2009
1.2
9:01
21.2
. 8:44
21.2
8.96
9:10
20.9
9:18
20.9
7.54
9:33
20.0
`6757
9:40
20.5
9:46
20.7
6.83
6/8/2009
0.0
10:07
20.9
6.98 9:08
21.3
8.90
10:18
21.1
5.82
' 10Y2F
"
77-9 `
-1'
' ' 07 '
`"?r
10:51
20.5
5.86
10:57
20.4
6.4.
6/10/2009
0.0
8:41
22.0
9.45
9:44
21.6
6.07
10:07
21.8
8.19
10:27
21.3
!.4.68'
10:38
21.5
5.98
10:47
21.5
6.141
7.91
6/12/2009
0.2
9:00
21.3
7.45
8:30
22.1
8.95
9:12
21.3
7.46
9:22
21.4
8.48
9'
5>
9:46
20.8
7.30
9:54
20.9
oteigail
TR6
tRIB
u

I
Color Coded Stream
Discription
clear water _ Slightly Turbid
Turbid
imon
Very Turbid
Muddy
Very Muddy
0 thru 5 NTU 6 thru 10 NTU
> 100 NTU
50 thru 100 NTU
21 thru 50 NTU
~ 11 thru 20 NTU
TEMPERATURE AND DO MONITORING FOR 12-MILE CREEK
Page 2
Collection Points
N.C. UPSTREAM 6
Shannon DR. 3/4 mile
Off of Waxhaw Indian
Trail Rd. at SR-
1328 Bridge
N.C. UPSTREAM 7
Billy Howie Rd
Between Pleasant
Grove Rd. and New
Town Rd.at SR-
1329 Bridge
N.C. UPSTREAM 8
Chamberwood Rd.
2/10 of a Mile off
New Town Rd.
at SR-1336 Bridge
N.C. UPSTREAM 9
S. Potters Rd. 1/4 Mile
from New Town Rd. at
SR-1162 Bridge
N.C. UPSTREAM 10
S. Potters Rd.
Between New Town
Rd. and NC-84 at
SR-1162 Bridge
N.C. UPSTREAM 11
Bridge on NC-84
1/2 Mile from
S. Potters Rd.
N.C. UPSTREAM 12
Bridge on NC-84
1 1/2 Miles from S.
Potters Rd.
12- Mlle Creek or
Tributary
TRIBUTARY
TRIBUTARY
TRIBUTARY
TRIBUTARY
12 Mile Creek
12 Mile Creek
TRIBUTARY
'
GPS
Locations
RAIN
FALL
(X) 1490982.562517
(Y) 447487.550008
(X) 1495249.418332
(Y) 450548.909618
(X) 1496066.100757
(Y) 453952.839138
(X) 1502318.142066
(Y) 452322.647899
(X) 150 052.866603
(Y) 457654.412556
(X) 1502551.010019
(Y) 461182.267284
(X) 1507402.291668
(Y) 459665.611535
Dates
AMOUNTS
TIME
TEMP.
DO
TEMP.
DO
TIME
TEMP.
DO
TIME
TEMP.
D
TIME
TEMP.
TIME
TEMP.
TIME
TEMP.
17.6
DO
Zak
5/14/2009
0.0
11:11
16.3
5.95
11:30
17.4
6.22
11:38
16.7
6.95
11:52
17.2
4.61
11:58
16.9
.20
12:06
17.3
4.42
12:15
5/15/2009
0.0
8:36
16.9
5.45
8:45
17.2
5.86
8:52
17.4
6.55
i 9:00
17.4
4.55
9:05
16.9
3.80
1 9:14
18.6
4.21
9:20
17.9
3.45
5/18/2009
0.4
11:09
16.3
6.10
11:21
16.4
6.93
11:28
15.5
7.15
11:39
15.8
6.15
11:45
16.3
3.83
11:53
15.9
. 2
12:0.2
15"7
6.42
5/20/2009
0.0
10:28
14.1
6.05
10:38
14.6
7.40
10:48
14.3
7.29
10:54
14.1
5;,,a
11:01
14.6
4.64
11:09
15.5
5.73
11:16
15.5
;04.71
5/22/2009
0.0
9:55
16.2
5.85
10:04
16.9
6.00
10:12
17.0
7.22
10:20
17.6
k.4.21 ,
10:26
17.1 ,)
3.76
10:32
17.9
5.31
10:40
17.6
( 2.89)
r, :
5/26/2009
1.0
10:52
20.6
6.69
11:01
20.1
6.75
11:06
19.8
6.96
11:14
20.5
11:20
20.9
3.25
11:27
21.5
5.23
11:39
21.1
5/27/2009
0.0
10:56
20.5
5.85
11:08
20.8
5.37
11:15
20.3
6.34
11:27
20.3
4.97
1:32
21.0
4.48
11:38
21.5
4.10 '
11:46
20.9
14.1
5/29/2009
0.8
10:08
20.3
•
10:17
20.3
6.81
10:23
20.3
8.08
10:33
20.3
5.08
10:38
21.1
4.79
10:46
21.0
10:51
20.9
4.89
6/1/2009
6/3/2009
0.0
0.0
9:50
20.3
4.77
10:50
20.2
4
10:56
19.9
6.37
11:05
19.8
3.68
11:10
19.8
3.75
11:19
21.4
4.08
9:58
20.8
r
' ;.. ,
. 0
10:39
10:04
20.8
5.89
1 Q;
A
11:00
22.3
0.10
11:06
21.0
4
20.7
6.88
10:13
20.2
5.16
10:19
21.1
n-- ,
10:25
21.3
•
10:31
20.8
14.46 T
6/5/2009
1.2
6/8/2009
0.0
11:01
20.2
' ' .
11:11
21.1
5.65
11:17
20.9
6.24
11:27
20.4
4.89
11..,,
21.6
4.00-°
11:45
21.7
3.36
; 11:48
20.6
6/10/2009
0.0
10:51
21.1
5.49
i f :02
21.8
6.15
11:08
21.5
6.68
11:16
21.6,
3.81
22.7
3.91
11:49
21.0 ;
4.89
6/12/2009
0.2
9:58
20.8
6.18
10:06
21.0
7.26
10:12
21.4
7.12
10:22
20.9
10:34
22.0
10:40
21.0
5.98
10:47
22.0
3.89
,1
TA 18
7Rf43
v
TR6

DS1 (Downstream view):
US1 (Downstream view):
US2 (Downstream view):
DS1 U • stream view
US1 (Upstream view):
US2 (Upstream view):

US3 (Downstream view):
US4 (Downstream view):
US5 (Downstream view):

US6 (Downstream view):
US7 (Downstream view):
US8 (Downstream view):
US6 U • stream view
US7 (U • stream view):
US8 (Upstream view):
}
AehOhy

US9 (Downstream view):
US10 (Downstream view):
US11 (Downstream view):
US10
Upstream view
• ; '10 .
US11 Upstream view

US12 (Downstream view):
US12 (Upstream view):

Mark,
Attached are a few samples of flow "impeders" found in Twelve Mile Creek and
tributaries to Twelve Mile Creek.
Following rain events (or periods of higher flow, the tree across the stream at
Upstream 4 appears to enhance D.O. levels assumed due to the turbulence induced
by the vertical fall. As flow subsides, the tree is like a dam impeding flow (no
turbulence) with lower D.O. downstream.
Though it may be hard to distinguish from the photo provided, the two culverts
beneath roadway at Upstream 7 sample site both have debris blocking over halfway
across and halfway up the left side of each.
Upstream 12 site of field adjacent to sample site was quite odiferous from recent
application of poultry litter. Heavy equipment passage over the stream has reduced
stream width on upstream side of roadway. Cattle guard (gate) across culvert under
roadway has trapped significant quantities of debris retarding stream flow.
A huge beaver dam near Hawfield (approximately 8 feet high with respect to the
level of the lower water level below blocks a primary tributary to Twelve Mile Creek.
Debris against bridge provides damming effect at Downstream 1 sampling location
just upstream of sample site.
Though I have no real guess of the impact of paint contents from NC DOT operations
(June
1, 2009) in/on the surface waters at bridge at Upstream 7 location, this
appearance
was "unsettling".
Basic correlations are as follows:
When stream(s) are free flowing (through or over obstacles), D.O. is above 5.0
mg/I
When flows subside, waters pool upstream of debris, trees, etc. and D.O. drops
in
identified areas
There is at least one (poultry litter-ed field) run-off that could impact stream
quality
There are some other factors (NC DOT bridge painting) that could potentially
impact
stream quality
Please advise if you need further supportive information to the attachments.
Thanks,
John
Attachments:

Upstream 9 (inside of both
upstream of sampling location)
culverts)
Upstream 12 (Field with
oultr litter recently a • . lied)
Beaver dam located on
primary tributary to Twelve
Mile Creek (height approx.
8 feet above lower water
surface level)
•

Debris blockage upstream of
Downstream 1 sample site
NC DOT painting bridge at
U • stream 7 sam • le site
Upstream 7 water surface
following NC DOT bridge
painting

Zook-o8 ��ro �ti� yPur.1�
Union Co- 12 Mile Creek
Instream Monitoring (2007-2008)
Upstream - 50 ft Dwn1- 1/4 mile b/I outfall / Dwn2- SR1301
DO DO
Date Temp DO Mo. Avq. Temp DO Mo. Avq.
4/3/2008 14.4 6.85 14.8 7.31
4/9/2008 15.4 7.84 15.8 8.31
4/16/2008 14 8.03 14.4 8.45
4/24/2008 17.2 7.18 17.6 7.47
4/30/2008 16.1 7.19 7.42 16.5 7.36 7.78
5/8/2008 18.1 7.68 18.5 8.43
5/15/2008 18 5.28 18.3 5.31
5/22/2008 18.1 6.24 18.4 6.45
5/30/2008 18.6 5.8 6.25 18.8 6.2 6.6
6/2/2008 20.3 5.14 20.7 5.36
6/3/2008 20 5.03 20.4 5.23
6/4/2008 20.4 5.13 20.8 5.33
6/11/2008 21.2 5.25 21.5 5.41
6/12/2008 20.9 5.18 21.3 5.3
6/13/2008 21.3 5.03 21.7 5.29
6/17/2008 22 5.29 22.4 5.41
6/18/2008 20.4 5.02 20.8 5.17
6/19/2008 20.1 5.75 20.4 6.07
6/24/2008 21.1 6.18 21.4 6.45
6/25/2008 21.1 5.39 21.5 5.57
6/26/2008 22.4 5.27 5.31 22.3 5.4 5.5
7/1/2008 21.2 5.73 21.5 6.03
7/2/2008 20.9 5.45 21.3 5.71
7/3/2008 24 3.41 24.4 ) 3.97
7/8/2008 22.4 3.76 (LA'S 2.8 4.15
7/9/2008 22 5.76 22.3 6.24
7/11/2008 22.1 4.78 22.5 5.31
7/15/2008 23.8 6.18 24.5 6.08
7/16/2008 23.3 6.29 23.8 6.18
7/17/2008 22.6 5.72 23.4 5.6
7/22/2008 22.8 5.45 23.1 5.51
7/23/2008 22.6 5.3 23 5.38
7/24/2008 22.8 5.45 23.1 5.39
7/29/2008 22.8 5.06 23.1 5.18
7/31/2008 22.3 5.4 5.27 22.8 5.48 5.44
8/1/2008 21.6 4.67 22 1 4.89
8/6/2008 24.1 5.08 24.4 J 5.11
8/7/2008 23.9 4.98 .2 5.05
8/8/2008 24.5 5.93 24.8 5.9
8/12/2008 22.1 5.23 22.3 5.29
8/14/2008 22 5.8 22.3 5.85
8/15/2008 21 5.91 21.3 6
8/18/2008 21.2 6.41 21.5 6.36
8/19/2008 22.1 5.35 22.4 5.37
8/21/2008 22.2 5.05 22.6 5.1
8/25/2008 22.4 5.01, 22.8 5.07
8/28/2008 22 4.9 22.3 5.07
8/29/2008 23.1 5.68 5.38 23.4 5.65 5.44
DO
Temp DO Mo. Avg.
15.8 8.4
14.4 8.51
17.6 7.51
16.5 7.51 7.88
18.5 8.56
18.3 6.04
18.4 6.52
18.8 6.31 6.86
20.7 5.42
20.4 5.23
20.8 5.39
21.5 5.49
21.3 5.43
21.7 5.38
22.4 5.57
20.8 5.28
20.4 6.13
21.4 6.58
21.5 5.68
22.3 5.48 5.59
21.5 6.14
21.3 5.83
24.4 4.05
22.8 4.33
22.3 6.31
22.5 5.43
23.9 6.71
23.4 6.41
23.1 5.81
23.1 5.47
23 5.36
23.1 5.47
23.1 5.13
22.6 5.43 5.56
22 5.01
24.2 5.28
24.2 5.09
24.8 5.87
22.3 5.24
22.3 5.84
21.3 6.01
21.5 6.37
22.4 5.37
22.6 5.07
22.8 5.03
22.3 5.02
23.4 5.79 5.46

Upstream - 50 ft
DO
Date Temp DO K. Avq.
9/2/2008 21.4 6.04
9/3/2008 22.4 5.75
9/4/2008 21.8 6.01
9/9/2008 22.8 5.6
9/10/2008 23.5 6.1
9/11/2008 21.8 5.75
9/17/2008 22.8 6.14
9/18/2008 19.4 6.53
9/19/2008 21.6 6.31
9/24/2008 17.8 5.91
9/25/2008 17.4 5.1
9/26/2008 18 5.7 5.91
10/3/2008 15.7 6.26
10/8/2008 16.7 5.28
10/16/2008 18.7 5.47
10/23/2008 15.9 5.04
10/30/2008 10 5.79 5.57
Union Co- 12 Mile Creek
Instream Monitoring (2007-2008)
Dwn1- 1/4 mile b/I outfall Dwn2- SR1301
DO DO
Temp DO Mo. Avq. Temp DO Mo. Avq.
21.8 5.99 21.8 6.02
22.7 5.79 22.7 5.68
22.3 6.03 22.3 5.99
23.1 5.58 23.1 5.64
23.7 6.07 23.7 6.13
22.2 5.74 22.2 5.7
23 6.14 23 6.19
19.8 6.57 19.8 6.49
21.9 6.38 21.9 6.32
18.1 5.26 18.1 5.23
17.9 5.23 17.9 5.19
18.3 5.63 5.87 18.3 5.69 5.86
16.1 6.3 16.1 6.21
17.2 5.3 17.2 5.19
18.7 5.56 18.7 5.5
16.1 5.19 16.1 5.28
10 5.83 5.64 10 6 5.64
7,6015 po<S 10
P=3

Upstream - 50 ft Dwn1- 1/4 mile b/I outfall Dwn2- SR1301
DO DO DO
Date Temp DO Mo. Avg. Temp DO Mo. Avg. Temp DO Mo. Avg.
4/4/2007 17.6 9.77 18 9.87 18 10.15
4/12/2007 12.9 6.49 13.2 6.34 13.2 7.08
4/18/2007 13.4 8.64 13.7 8.56 13.7 8.71
4/26/2007 17.9 6.89 7.95 18.2 7.09 7.97 18.2 7.14 8.27
5/3/2007 18.6 10.25 18.6 10.06 18.6 11.43
5/11/2007 17.8 5.17 18.1 5.76 18.1 6.04
5/17/2007 18.7 5.83 18.9 5.12 18.9 5.62
5/24/2007 18.3 6.25 6.56 18.8 6.02 6.48 18.8 6.18 6.99
6/5/2007 20.1 4.98 20.4 5.03 20.4 5.2
6/6/2007 20.5 7.22 20.7 7.29 20.7 7.36
6/7/2007 21 4.79 21.3 4.87 21.3 4.9
6/12/2007 20.3 5.11 20.5 5.14 20.5 5.24
6/13/2007 20 4.92 20.4 5.25 20.3 5.6
6/14/2007 19.9 6.67 20 6.76 20.1 6.89
6/19/2007 22 5.34 22.3 5.61 22.3 5.73
6/20/2007 22 5.18 22.2 5.6 22.2 5.43
6/21/2007 21.3 5.07 21.7 5.18 21.7 5.23
6/26/2007 22.2 5.65 22.4 5.73 22.4 5.84
6/27/2007 22.7 5.6 23 5.81 23 5.79
6/28/2007 23.5 5.37 5.49 23.5 5.49 5.65 23.5 5.47 5.72
7/3/2007 21.2 5.39 21.5 5.48 20.4 5.55
7/5/2007 21.4 5.02 21.7 5.26 20.7 5.29
7/6/2007 21.8 4.76 22.3 5.03 21.3 5.06
7/9/2007 22.5 4.07 22.8 4.19 20.5 4.27
7/12/2007 23.4 5.43 23.7 5.71 20.3 5.73
7/13/2007 22.7 5.73 23.1 6.05 20.1 6.13
7/17/2007 22.3 5.67 22.7 6.13 22.3 6.15
7/18/2007 22.9 4.94 23.3 5.17 22.2 5.29
7/19/2007 23.6 4.75 23.8 5.02 21.7 5.05
7/25/2007 21.1 4.07 21.5 4.15 22.4 4.19
7/26/2007 21.6 3.17 22 4.74 23 4.93
7/27/2007 22.4 3.07 22.8 5.79 23.5 5.77
7/31/2007 22.6 5.09 4.7 23 6.14 5.3 23 6.17 5.35
8/2/2007 22.6 4.25 23.1 5.19 23.1 5.3
8/3/2007 22.9 4.61 23.4 5.32 23.4 5.34
8/7/2007 24.6 2.41 25 3.87 25 3.94
8/8/2007 25.3 2.45 25.7 4.75 25.7 4.97
8/9/2007 25.4 2.25 25.9 4.97 25.9 5.02
8/15/2007 24.3 2.21 24.7 5.08 24.7 5.15
8/16/2007 24.2 1.6 24.6 4.87 24.6 4.98
8/17/2007 24.8 3.05 25.2 5.07 25.2 5.21
8/22/2007 25.7 4.96 26.2 5.83 26.2 5.92
8/23/2007 23.7 3.52 24.1 5.89 24.1 6.04
8/24/2007 24.2 3.07 24.6 3.41 24.6 3.48
8/28/2007 25.1 ' 1.91 25.4 4.76 25.4 4.87
8/29/2007 24.6 2.04 25 5.88 25 5.63
8/30/2007 24.1 1.7 2.86 24.5 5.65 5.04 24.5 5.21 5.08

Upstream - 50 ft Dwn1- 1/4 mile b/I outfall
DO DO
Date Temp DO Mo. Avg. Temp DO Mo. Avg.
9/5/2007 22 2.8 22.3 5.12
9/6/2007 23.7 2 24.3 5.19
9/7/2007 25.4 2.17 25.9 5.14
9/11/2007 24.1 3.5 24.5 4.37
9/12/2007 23.4 3.2 23.8 5.77
9/13/2007 22.7 3.26 23.3 6.17
9/17/2007 18.6 4.71 19.4 6.47
9/18/2007 18.1 3.66 18.5 6.28
9/19/2007 18.1 3.61 18.5 6.27
9/25/2007 24.3 2.03 25 5.47
9/26/2007 19.9 1.88 20.3 5.31
9/27/2007 19.6 2.09 2.91 20.2 5.13 5.56
10/4/2007 23.1 2.81 23.6 5.45
10/11/2007 25.1 2.41 25.5 5.78
10/15/2007 22.8 2.7 23.4 5.69
10/26/2007 22.4 2.37 23 6.18
10/30/2007 22 2.93 2.64 22.4 6.14 5.85
Dwn2- SR1301
DO
Temp DO Mo. Avq.
22.3 5.23
24.3 5.33
25.9 5.83
24.5 4.51
23.8 5.79
23.3 6.13
19.4 6.53
18.5 6.37
18.5 6.25
25 5.63
20.3 5.43
20.2 5.35 5.7
23.6 5.78
25.5 5.89
23.4 5.95
23 6.27
22.4 6.28 6.03
2-007 00 G S -0 f

Twelve Mile Creek at Highway 16 (upstream of Union Co- 12 Mi. Creek WWTP)
Yy 611ovc spiewif dt..144.4y
Station ID Activity Start Characteristic Name
C9819500 1/17/2007 13:15 Dissolved oxygen (DO)
C9819500 2/12/2007 15:15 Dissolved oxygen (DO)
C9819500 3/7/2007 15:45 Dissolved oxygen (DO)
C9819500 4/12/2007 16:45 Dissolved oxygen (DO)
C9819500 5/16/2007 16:00 Dissolved oxygen (DO)
C9819500 6/12/2007 16:45 Dissolved oxygen (DO)
C9819500 7/17/2007 14:00 Dissolved oxygen (DO)
C9819500 8/15/2007 15:30 Dissolved oxygen (DO)
C9819500 9/27/2007 11:30 Dissolved oxygen (DO)
C9819500 10/10/2007 14:15 Dissolved oxygen (DO)
C9819500 11/7/2007 13:00 Dissolved oxygen (DO)
C9819500 12/6/2007 15:00 Dissolved oxygen (DO)
7/07 77 �•'
6h7 (a•b-8 Y, x = 7,7
g/47 ,.y-1. o, x- 75
Sample Fri Value T
Dissolved Actual
Dissolved Actual
Dissolved Actual
Dissolved Actual
Dissolved Actual
Dissolved Actual
Dissolved Actual
Dissolved Actual
Dissolved Actual
Dissolved Actual
Dissolved Actual
Dissolved Actual
Result Value < Units
10 mg/I
13.5 mg/I
10 mg/I
7.7 mg/I
6.8 mg/I
6.2 mg/I
5.4 mg/I
2.7 mg/I
1.5 mg/I
1.4 mg/I
4.2 mg/I
2.2 mg/I
T� 7/lY/i9
Union Co. DO result
2.21 mg/I same day
2.09 mg/I same day
2.41 mg/I day after
6.03 mg/I day after
3.60 mg/I same day

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Union County/12 Mile Crk DO Data/Catawba Basin
Subject: Union County/12 Mile Crk DO Data/Catawba Basin
From: Tom Belnick <[e-mail]>
Date: Tue, 07 Apr 2009 10:18:15 -0400
To: jackie nowell <[e-mail]>
CC: melanie Williams <[e-mail]>
-ei-- itmknite oivot4
-Ivo,4,,,i wt.,- ,
Jackie- can you send the electronic files of the 2007-08 instream DO data (upstream,
Dwnl, Dwn2) that you prepared for Union County/12 Mile Creek WWTP (NC0085359) to
Melanie Williams. I discussed with Melanie what appears to be a non -point source
issue (extreme low DO) above the WWTP, and what options there might be to
investigate. Thanks.
Email correspondence to and from this address may be subject to the North Carolina
Public Records Law and may be disclosed to third parties.
Tom Belnick
Supervisor, Western NPDES Program
N.C. Division of Water Quality
919-807-6390
919-807-6495 (fax)
[e-mail]
1 of 1 4/7/2009 10:18 AM

Re: Union County aci)/Y1'I/62IuL•
Mi'ehi'j ��-��c 5/8
Subject: Re: Union Count J
Y
From: Tom Belnick <[e-mail]>
Date: Tue, 07 Apr 2009 15:29:03 -0400
To: "Struve, James N." <[e-mail]>
CC: Jeff Poupart <[e-mail]>, Kathy Stecker <[e-mail]>, Bob Sledge
<[e-mail]>, Jackie Nowell <[e-mail]>
Jim- I set up a meeting for Friday May 8 , 11 am, in Archdale Bldg 9th floor conference room. We
would like to discuss the Union County/12 Mile Creek WWTP expansion issue, as well as some other
Union County/Goose Creek permitting issues:
• Union County/12 Mile Creek WWTP (NC0085359)- I don't think that DWQ would be amenable
to considering an expansion until causes of low upstream DO are identified (appears to be
non -point sources), and potential corrections are evaluated. Does Union County have additional
information on potential upstream sources, or would this need to be a new study. Also, DWQ will
be evaluating the 2004-2008 dataset to identify 303(d) impaired waters for the 2010 report, and
these findings might impact 12 Mile Creek status.
• Union County/Hunley Creek WWTP (NC0072508)- Union County removed this discharge to
Goose Creek in 2006, but the permit is still active. The plant was in chronic noncompliance prior
to diversion. The Goose Creek Rules became effective 2/1/2009, and the EMC has adopted the
Hearing Officer recommendations which includes elimination of this permit.
• Goose Creek Utility/Fairfield Plantation WWTP (NC0034762)- Union County has a 2006 MOA
with facility to take over discharge (which goes to Goose Creek) and divert wastewater flow to 12
Mile Creek WWTP. It appears this transfer is still being negotiated.
Struve, James N. wrote:
Tom,
Let's schedule a meeting for the week of May 4th. We are available to meet any day but Thursday, May
7th I would suggest a 11:00 AM meeting if at all possible. Let me know what works best in yours and Jeffs
and Kathy's schedule.
Thanks for coordinating Tom.
Jim
James N. Struve, P.E.
Hazen and Sawyer, P.C.
4944 Parkway Plaza Boulevard, Suite 375
Charlotte, NC 28217
Office [phone]
Cell [phone]
Fax [phone]
Email jstruve(ci)hazenandsawyer.com
1 of 3 4/7/2009 3:32 PM

Re: Union County
' . .
4
From: Tom Be!nick [mailto:[e-mail]]
Sent: Monday, April 06, 2009 4:34 PM
To: Struve, James N.
Subject: Re: Union County
Jim- Thurs April 9 won't work- I'm already booked. It looks like Jeff Poupart will be on vacation one week in
April, and in military reserves another week, so its realistically looking like the week of May 4 for a possible
meeting.
Struve, James N. wrote:
Hi Tom,
I informed Mark Tye (Union County Public Works - Assistant Director) of our discussion last Friday
pertaining to the County's request to study the impact of diverting a portion of its final treated effluent
upstream of its existing NPDES discharge point in an effort to improve water quality within 12-Mile Creek
(refer to attached letter) . Mark and I are willing and able to informally meet with you, Jeff and Kathy this
Thursday, April 9th to ensure that all parties understand the request that is being made and what
regulatory challenges need to be addressed.
Please let me know if you all are available to meet on this day. We could be in Raleigh by 11:00 AM. We
would not anticipate this meeting to last more than 1-hour.
Thanks Tom for your consideration.
Regards,
Jim
James N. Struve, P.E.
Hazen and Sawyer, P.C.
4944 Parkway Plaza Boulevard, Suite 375
Charlotte, NC 28217
Office [phone]
Cell [phone]
Fax [phone]
Email jstruvehazenandsawyer.com
Email correspondence to and from this address may be subject to the North Carolin
Tom Belnick
Supervisor, Western NPDES Program
N.C. Division of Water Quality
919-807-6390
919-807-6495 (fax)
[e-mail]
Email correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
i
Tom Belnick
2 of 3 4/7/2009 3:32 PM

UNION COUNTY PUBLIC WORKS
Scott Huneycutt, Interim Director
November 21, 2008
Mr. Tom Belnick
Supervisor, Western NPDES Program
512 North Salisbury Street
Archdale Building, 9th Floor
Raleigh, NC 27604
Re: Twelve Mile Creek WWTP Discharge /I
Union County, North Carolina QV
Dear Tom:
Col) 8s3 5?
It was a pleasure meeting you Monday, November 3`d and discussing with you our situation in Union
County — specifically the Twelve Mile Creek service area. The following bulleted items summarize the
highlights of our meeting:
• Within the past 10-years, the southwestern portion of Union County has experienced double digit
growth rate, thereby necessitating expansion of the 12-Mile Creek WWTP from its original
capacity of 2.5 mgd to 6 mgd. This expansion project was recently completed in August 2007.
Currently, the plant is treating a little over 3 mgd on average.' Since issuance of the revised
permit to discharge up to 6 mgd, the facility has reliably met its NPDES permit limits including its
TMDL for phosphorus (both on a monthly and an annual average basis).
• Although residential development has slowed considerably with the nationwide economic
downturn, wastewater flow permits have already been allocated for 6.0 mgd of the plant's 6.0
mgd permitted flow. As a result, the County is not capable of allocating any additional flow
permits to allow for future growth needs.
• In December 2006, Union County requested speculative limits from NC DWQ to expand the
County's 12-Mile Creek WWTP beyond its current rated capacity of 6 mgd. In May 2007, DWQ
responded that they could not issue speculative limits since dissolved oxygen (DO) levels both
upstream and downstream of the WWTP discharge were below North Carolina's water quality
standard of 5 mg/L. DWQ recommended that the County explore alternative disposal options.
• In May 2007, Union County requested speculative limits from SC DHEC to remotely discharge
final effluent into South Carolina's section of Twelve Mile Creek. In December 2007, DHEC
responded that they would not allow a remote discharge into South Carolina waters of Twelve
Mile Creek due to low DO levels.
• A subsequent speculative limits request was made by Union County to discharge up to 9 mgd
directly into the Catawba River. In January 2008, DHEC formally issued conditional speculative
limits for this scenario.
As we discussed, even with the economic downturn and no more flow capacity in the County's 12-Mile
Creek WWTP, builders are still trying to develop within the Twelve Mile Creek service area. Treatment
options being considered include individual septic tanks with leach fields. Development will continue in
the Twelve Mile Creek service area. Therefore, the challenge that faces the County and the State is how
to balance safeguarding public health and the environment with providing reliable and sustainable
wastewater treatment.
500 North Main St., Suite 500 • Monroe, NC 28112-4730 • Phone: [phone] • Fax: [phone]

One alternative that the County would like to present for consideration by the State is to use the final
effluent from the 12-Mile Creek WWTP to improve dissolved oxygen levels throughout Twelve Mile Creek.
This alternative would entail pumping a portion of 12-Mile Creek WWTP's final effluent upstream of low
DO stream segments in an effort to increase dissolved oxygen levels. Compliance monitoring indicates
that the 12-Mile Creek WWTP discharge has a positive effect on in -stream DO levels.
Union County is of the opinion that this option is highly preferred to the option of totally removing the
discharge from Twelve Mile Creek and pumping directly to the Catawba River. If the plant's discharge
were redirected to the Catawba River, it is likely that sections of Twelve Mile Creek, at and below the
NDPES discharge point, would fall below water quality standards for dissolved oxygen and potentially
other parameters as well.
With State concurrence, the County is willing to make a substantial investment to demonstrate this
alternative's viability or non -viability. Please accept this letter as an official request to combine
resources in an effort to develop a joint approach to protect Twelve Mile Creek and its beneficiaries while
meeting the needs of Union County and its residents.
At your convenience, we would like to discuss this with you and your staff in greater detail. We look
forward to your favorable reply and to partnering with the State on this very critical issue. Should you
need to contact me, I can be reached at [phone] or via email at
Respectfully 7
-
.Mark E. TVe
Assistant Public Works Director
Cc: Scott Huneycutt, UCPW
Jim Struve, Hazen and Sawyer
Ron Taylor, Hazen and Sawyer

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Union Co: uhy , NC Meeting 3 3 iiiii
A40& 1 i
Subject: Union County, NC Meeting
From: "Struve, James N." <j [e-mail]>
Date: Mon, 27 Oct 2008 09:39:40 -0400
To: "[e-mail]" <[e-mail]>
CC: "[e-mail]" <[e-mail]>
Good morning Tom,
Mark Tye (Assistant Director of Union County Public Works Department) and I will be in the Raleigh
area either Friday, Oct 31st or Monday, Nov 3rd. If possible we would like to schedule a quick meeting
with you in the afternoon on either of these days to introduce ourselves and to inform you of what is
being planned in Union County .
Please let me know if you would be available to meet at 1:30 PM on Friday October 31st or at 3:00 PM
on Monday, November 3rd.
I look forward to hearing from you.
Regards,
Jim
James N. Struve, P.E.
Senior Associate
Hazen and Sawyer, P.C.
4944 Parkway Plaza Boulevard, Suite 375
Charlotte , NC 28217 `
Office [phone]
Cell [phone]
Fax [phone]
1 of 2 10/27/2008 3:17 PM