NC0043532_Approval_20150603

NPDES DOCUMENT :MANNIN`: COVER SHEET
NPDES Permit:
NC0043532
West Stanly / Oakboro WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
%frova//�
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
June 3, 2015
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4
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Mr. Andy Lucas, County Manager
County of Stanly
1000 N First Street, Suite 10
Albemarle, NC 28001
Dear Mr. Lucas:
Donald R. van der Vaart
Secretary
June 3, 2015
SUBJECT: Clean Water State Revolving Fund
Letter of Intent to Fund
West Stanly WWTP and Sanitary Sewer
Improvements
March 2015 Application Cycle
Project No: CS 370834-04
The Division of Water Infrastructure has reviewed your application to the Clean Water State Revolving Fund
(CWSRF) program, and the State Water Infrastructure Authority has approved your project as eligible to receive
a low -interest loan. The total loan amount will be $2,648,894 at an interest rate of 0%. A loan fee of 2% will be
invoiced after bids have been received.
Please note that this intent to fund is contingent on approval of the loan through the Local Government
Commission and on meeting all of the following milestones:
Milestone
Date
Engineering Report Submittal
October 1, 2015
Engineering Report Approval
March 1, 2016
Bid and Design Package Submittal
September 1, 2016
Bid and Design Package Approval
January 3, 2017
Advertise Project, Receive Bids, Submit Bid
Information, and Receive Authority To
May 1, 2017
Award
Execute Construction Contract(s)
June 1, 2017
The first milestone is the submittal of an Engineering Report by close of business on October 1, 2015. The
Engineering Report must be developed using the updated guidance found on our website
(htto://portal.ncdenr.orglweb/wi/cleanwater). This updated version will only be available after June 1, 2015.
Failure to meet any milestone may result in the forfeiture of CWSRF funding for the proposed project.
Division of Water Infrastructure
1633 Mal Service Center, Raleigh, North Carolina 27699-1633
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] Internet: go.ncdenr.gov/wi
An Equal Opportunity 1 Affirmative Action Employer

Mr. Andy Lucas, County Manager
June 3, 2015
Page Number 2
Upon detailed review of the project during the funding process, it may be determined that portions of your
project are not eligible for CWSRF funding and the total loan amount may be reduced. Additionally, changes in .
the scope or priority points awarded — based on additional information that becomes apparent during project
review — may also result in changes to the total ban amount and loan terms.
CWSRF Project Process Training_ on June 24, 2015 at Rural Economic Development Center
Please note that we will be offering training on the funding process with detailed information on Engineering
Report development. This training will be held on Wednesday, June 24, 2015 at 1.00 p.m. at the Rural Economic
Development Center (4021 Carya Drive, Raleigh, NC). While this is an optional training, we strongly encourage
you (or your representative) and your engineer to attend as we will be discussing the changes to the program
including requirements mandated by 2014 Water Resources Reform Development Act (WRRDA).
Davis -Bacon Requirements and American Iron and Steel Provisions
Projects funded through the CWSRF program must comply with Davis -Bacon wage requirements and American
Iron and Steel provisions. You can find standard specifications covering these requirements on our website
(http://portal.ncdenr.orgJweb/wi/cleanwater/design).
Brooks Act Compliance
Projects funded through the CWSRF program must comply with the federal Brooks Act for the selection of
architectural and engineering services. CWSRF projects cannot be exempted from qualification based selection
of these services under N.C.G.S. 143-64.32. Any services provided that were not selected in compliance with
federal requirements will be ineligible for reimbursement.
General Assembly Notification Requirements
In accordance with G.S. 120-157.1 through 157.9, enacted on June 24, 2011, local government units with
projects that require debt to be issued greater than $1,000,000 must submit a letter to Committee Chairs,
Committee Assistant, and the Fiscal Research Division of the General Assembly at least 45 days prior to
presentation before the Local Government Commission. You are responsible for submitting this letter and
providing a copy to the Division of Water Infrastructure upon receipt of this approval letter.
An overview of our CWSRF funding process is available on our website
(http://portal.ncdenr.org/web/wi/cleanwater). If you have questions, please contact Seth Robertson, PE, Chief,
State Revolving Fund Section at 919-707-9175.
Sincerely,
Kim H. Colson, P.E., Director
Division of Water Infrastructure, NCDENR
CC: Mr. Granseur Dick, PE, Chambers Engineering, PA, Albemarle, NC
Seth Robertson, PE
Mark Hubbard, PE
CWSRF File

Engineering Alternatives Analysis
for
Wastewater Treatment Plant Rerating
Town of Oakboro
TWC No. 2938-C
Aprila13
CAR
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Crysta I 1117 Mtn: P. E.
ie-413?-2.0/3
THE WOOTEN COMPANY
•'.
B.L. F-0115

Table of Contents
1.0 Introduction 1
2.0 Current Situation 1
2.1 Service Area 1
2.2 Current Population 1
2.3 Current Flows 3
3.0 Future Situation 5
3.1
3.2
4.0
Population Projections
Flow Projections
Alternatives Analysis
5
7
8
4.1 Connection to an Existing Plant 8
4.2 Land Application 8
4.3 Wastewater Reuse 9
4.4 Surface Water Discharge through NPDES Program 11
4.5 Present Worth Analysis 12
5.0 Recommendations 12
List of Figures
Figure 1: Historical Population - Stanly County 2
Figure 2: Historical Population - Oakboro, Stanfield, and Locust 3
Figure 3: Existing Flows - Oakboro WWTP 4
Figure 4: Population Projections - Stanly County 6
Figure 5: Population Projections - Oakboro, Stanfield, and Locust 6
Figure 6: Flow Projections 8
List of Tables
Table 1: Historical Population Data - Stanly County 1
Table 2: Historical Population - Oakboro, Stanfield, and Locust 2
Table 3: DMR Flow Data 4
Table 4: Population Projections 5
Table 5: Flow Projections 7
Table 6: Land Application Alternative - Project Costs 9
Table 7: Reclaimed Water Alternative - Project Cost 10
Table 8: Project Cost - Surface Water Discharge Alternative 12
Table 9: Present Worth Analysis 12

Appendices
Appendix 1: Exhibits
Exhibit 1: General Location Map
Exhibit 2: WWTP Schematic
Exhibit 3: WWTP Site Plan
Appendix 2: NPDES Permit
Appendix 3: Sludge Management Plan

1.0 Introduction
The Town of Oakboro, incorporated in 1915, is located in the southwest portion of Stanly County.
The town is located at the intersection of Highways 205, 732, and 138 and is approximately 30 miles east
of the City of Charlotte.
The Town of Oakboro owns and operates a wastewater treatment plant. This treatment plant is
located approximately 3.4 miles to the east of downtown Oakboro. The plant is operated under NPDES
permit NC0043532 (see Appendix 2) and is rated for 0.90 MGD of average daily flow. The treatment
plant discharges into Rocky River by way of its main outfall, Outfall 002, which is located approximately
1.8 miles to the south east of the wastewater treatment plant site. The town of Oakboro, its
wastewater treatment plant, and the main outfall are all depicted on the attached general location map
(see Exhibit 1 in Appendix 1).
2.0 Current Situation
2.1 Service Area
The Town of Oakboro currently provides wastewater treatment to its own citizens as well as to
the Town of Stanfield and the Town of Locust. The town of Oakboro provides service as far west as the
Cabarrus/Stanly County line and approximately eight miles north to the Lambert area.
2.2 Current Population
Population data for the towns of Oakboro, Stanfield, and Locust was gathered from the Log Into
North Carolina (LINC) database. LINC is an interactive data retrieval service containing historical
information for a variety of geographic areas within the state of North Carolina. Historical population
data for Stanly County was also retrieved from the LINC database.
The data indicates that steady growth has been occurring in Stanly County since the 1970s. From
1970 through 2011 Stanly County has an average annual growth rate of 0.87%. The table below
contains the historical population data for Stanly County. The figure below shows a graphical
representation of this data.
Table 1: Historical Population Data - Stanly County
Year
Pop.
%
Growth
Year
Po p'
%
Growth
Year
Po p'
%
Growth
Year
Pop.%Growth
Year
Po p'
%
Growth
1970
42,822
1980
48,517
1.93%
1990
51,765
0.30%
2000
58,100
1.66%
2010
60,585
0.63%
1971
44,100
2.98%
1981
48,541
0.05%
1991
52,599
1.61%
2001
58,720
1.07%
2011
60,936
0.58%
1972
44,800
1.59%
1982
48,744
0.42%
1992
53,043
0.84%
2002
58,838
0.20%
2012
61,291
0.58%
1973
45,400
1.34%
1983
48,966
0.46%
1993
53,276
0.44%
2003
58,739
-0.17%
1974
45,500
0.22%
1984
49,733
1.57%
1994
54,126
1.60%
2004
58,641
-0.17%
1975
45,700
0.44%
1985
50,182
0.90%
1995
54,326
0.37%
2005
58,092
-0.94%
•Fr
1976
46,000
0.66%
1986
50,220
0.08%
1996
55,055
1.34%
2006
58,791
1.20%
= .
1977
46,500
1.09%
1987
50,543
0.64%
1997
55,807
1.37%
2007
59,203
0.70%
y,
1978
47,000
1.08%
1988
51,002
0.91%
1998
56,384
1.03%
2008
59,906
1.19%
- ;.-1
1979
47,600
1.28%
1989
51,610
1.19%
1999
57,153
1.36%
2009
60,205
0.50%
Engineering Alternatives Analysis
Water Treatment Plant Rerating
Town of Oakboro
April 2013
TWC No.2938-C
1

Historical Population - Stanly County
70000
60000 --
50000 --
40000
ra
c 30000 --.
a
20000 --
10000
0
1960
T
1970 1980 1990 2000 2010 2020
Year
f-Population -
Stanley County
Figure 1: Historical Population - Stanly County
The historical population data gathered for the Town of Oakboro indicates growth in the town
from 1970 through 1999. From 1999 through 2009 the population declines slightly before beginning to
grow once again. In several instances the population jumps up significantly. These jumps in population
are most likely due to annexation of areas into the town. It should be noted that no population data
was available for the years between 1970 and 1980 and the year 2006.
The populations of both the Town of Stanfield and the Town of Locust have shown consistent
growth since 1970. The data also indicates some jumps in population likely due to annexation. The
table below contains population data for the Town of Oakboro, the Town of Stanfield, and the Town of
Locust. The figure below is a graphical representation of this data. It should be notes that no
population data was available for the years between 1970 and 1980 and the year 2006.
Table 2: Historical Population - Oakboro, Stanfield, and Locust
Year
Oakboro
Stanfield
Locust
Population
% Growth
Population
% Growth
Population
% Growth
1970
568
---
458
---
1,484
---
1980
587
---
463
---
1,590
---
1981
595
1.36%
469
1.30%
1,637
0.06%
1982
581
-2.35%
457
-2.56%
1,603
0.06%
1983
601
3.44%
462
1.09%
1,598
0.06%
1984
602
0.17%
487
5.41%
1,637
0.06%
1985
606
0.66%
500
2.67%
1,656
0.06%
1986
609
0.50%
510
2.00%
1,723
0.06%
1987
613
0.66%
517
1.37%
1,729
0.06%
1988
613
0.00%
529
2.32%
1,790
0.06%
1989
624
1.79%
552
4.35%
1,840
0.06%
1990
600
-3.85%
517
-6.34%
1,940
0.06%
1991
610
1.67%
528
2.13%
1,968
0.05%
1992
619
1.48%
537
1.70%
2,001
0.05%
1993
1,004
62.20%
536
-0.19%
1,983
0.05%
1994
1,023
1.89%
577
7.65%
2,042
0.05%
1995
1,027
0.39%
867
50.26%
2,054
0.05%
Engineering Alternatives Analysis April 2013
Water Treatment Plant Rerating TWC No.2938-C
Town of Oakboro 2

3500
3000
2500 -.
g 2000
°° 1500
cL
1000 -
500
0
1996
1,027
0.00%
953
9.92%
2,387
0.06%
1997
1,300
26.58%
961
0.84%
2,403
0.04%
1998
1,360
4.62%
958
-0.31%
2,418
0.04%
1999
1,386
1.91%
976
1.88%
2,466
0.04%
2000
1,198
-13.56%
1,113
14.04%
2,416
0.04%
2001
1,191
-0.58%
1,130
1.53%
2,446
0.04%
2002
1,187
-0.34%
1,230
8.85%
2,456
0.04%
2003
1,178
-0.76%
1,281
4.15%
2,500
0.04%
2004
1,166
-1.02%
1,284
0.23%
2,501
0.04%
2005
1,153
-1.11%
1,277
-0.55%
2,790
0.04%
2006
---
---
---
2007
1,140
---
1,293
---
3,180
---
2008
1,140
0.00%
1,309
1.24%
2,973
0.03%
2009
1,139
-0.09%
1,337
2.14%
3,154
0.04%
2010
1,859
63.21%
1,486
11.14%
2,930
0.03%
2011
1,889
1.61%
1,504
1.21%
2,948
0.03%
2012
1,936
2.49%
1,523
1.25%
3,034
0.03%
Historical Population
—$—Oakboro Historical Population
—E—Stanfield Historical Population
Locust Historical Population
1960 1970
1980 1990 2000 2010 2020
Year
Figure 2: Historical Population - Oakboro, Stanfield, and Locust
2.3 Current Flows
Flow data for the last four years has been collected from the Oakboro WWTP's Daily Monitoring
Reports (DMRs). The data indicates that the WWTP averages 0.384 MGD of wastewater treated daily.
Engineering Alternatives Analysis
Water Treatment Plant Rerating
Town of Oakboro
April 2013
TWC No.2938-C
3

The table below contains the monthly average flow data that was reported in the DMRs. Additionally,
the figure below is a graphical representation of this data.
Table 3: DMR Flow Data
Month
2009 Flows
(MGD)
2010 Flows
(MGD)
2011 Flows
(MGD)
2012 Flows
(MGD)
January
0.439
0.554
0.356
0.541
February
0.386
0.538
0.448
0.393
March
0.655
0.479
0.562
0.402
April
0,381
0.288
0.387
0.33
May
0.39
0.335
0.413
0.352
June
0.307
0.335
0.344
0.294
July
0.335
0.335
0.301
0.327
August
0.281
0.346
0.338
0.353
September
0.251
0.345
0.344
0.392
October
0.251
0.335
0.416
0.369
November
0.492
0.326
0.402
0.286
December
0.582
0.345
0.408
---
0.7
0.1
0
Existing Flows - Oakboro WWTP
--P--Monthly Average Daily Flow
--Average Flow
Jun-08 Dec-08 Jul-09 Jan-10 Aug-10 Feb-11 Sep-11 Apr-12 Oct-12 May-13
Date
Figure 3: Existing Flows - Oakboro WWTP
The Town of Oakboro has intermunicipal agreements with Stanfield and Locust for the treatment
of their wastewater. The agreement between Oakboro and Stanfield allots 150,000 gpd of treatment
capacity at the WWTP to Stanfield. The agreement between Oakboro and Locust allots 240,000 gpd of
treatment capacity at the WWTP to Locust. The Town of Oakboro's 2011 Local Water Supply Plan
indicates that of their allotted capacity both Stanfield and Locust used 0.050 MGD and 0.130 MGD
respectively indicating that the remaining 0.204 MGD of the average flow at the WWTP can be
attributed to the Town of Oakboro.
Engineering Alternatives Analysis April 2013
Water Treatment Plant Rerating TWC No.2938-C
Town of Oakboro 4

3.0 Future Situation
3.1 Population Projections
The south western portion of Stanly County is expected to increase in population due to its
proximity to the City of Charlotte. It is expected that as Charlotte grows, the areas surrounding it shall
also grow, as people settle these areas as a "spill over" effect. As such the populations for Stanly
County, the Town of Oakboro, the Town of Stanfield, and the Town of Locust have been projected
linearly at a growth rate of 0.58%, 1.85%, 1.96%, and 0.03% respectively. These growth rates were
determined by analyzing the historical population data. The table below contains the projected
population data for Stanly County and the towns of Oakboro, Stanfield, and Locust. Additionally, Figure
4 contains a graphical representation of the population projections for Stanly County while Figure 5
contains a graphical representation of the population projections for the Town of Oakboro, the Town of
Stanfield, and the Town of Locust.
Table 4: Population Projections
Year
Stanly County
Oakboro
Stanfield
Locust
2013
61,665
1,978
1,560
3,081
2014
62,040
2,020
1,596
3,129
2015
62,413
2,062
1,633
3,176
2016
62,786
2,104
1,670
3,224
2017
63,161
2,146
1,707
3,272
2018
63,536
2,188
1,744
3,319
2019
63,909
2,230
1,781
3,367
2020
64,283
2,272
1,817
3,415
2021
64,657
2,314
1,854
3,462
2022
65,030
2,356
1,891
3,510
2023
65,404
2,398
1,928
3,557
2024
65,778
2,440
1,965
3,605
2025
66,151
2,482
2,001
3,653
2026
66,527
2,524
2,038
3,700
2027
66,899
2,566
2,075
3,748
2028
67,272
2,608
2,112
3,796
2029
67,647
2,650
2,149
3,843
2030
68,021
2,692
2,186
3,891
2031
68,395
2,734
2,222
3,938
2032
68,767
2,776
2,259
3,986
Engineering Alternatives Analysis April 2013
Water Treatment Plant Rerating TWC No.2938-C
Town of Oakboro 5

80000
70000
60000
c 50000
0
g 40000
° 30000
20000
10000
0
1960 1970 1980 1990 2000 2010 2020 2030 2040
Yea r
Population Projections - Stanly County
Historical Population
Projected Population
Figure 4: Population Projections - Stanly County
O • 2500 —
Y
a 2000 I--
o.
Population Projections - Oakboro, Stanfield, and Locust
4500 r
4000
3500
3000 —
—0—Oakboro Historical Population
♦Stanfield Histocial Population
Locust Historical Population
—40—Oakboro Population Projection
...IF -Stanfield Population Projection
--*—Locust Population Projection
1500
1000 -
500 -
0 ..
1960 1970 1980 1990 2000 2010 2020 2030 2040
Year
---- —I
Figure 5: Population Projections - Oakboro, Stanfield, and Locust
Engineering Alternatives Analysis April 2013
Water Treatment Plant Rerating TWC No.2938-C
Town of Oakboro 6

3.2 Flow Projections
Flow projections were determined based on the population projections discussed in the section
above. Per the Engineering Alternatives Analysis Guidance Document prepared by the North Carolina
Division of Water Quality - NPDES Unit future residential flow was assumed to be 70 gallons per day per
capita and future commercial flow was assumed to be 15 gallons per day per capita. To determine the
flow projections these flow rates were multiplied by the projected population for each municipality
within the service area. As previously mentioned Stanfield has a capacity allotment from the Town of
Oakboro for 0.150 MGD. For the years 2013 through 2018 the projected flow from Stanfield was less
than its allotment. Because the WWTP is required to provide the full capacity allotment the calculated
flow was replaced with the allotted capacity for these. In addition to the calculated flow projections the
Town of Oakboro wishes to reserve 0.200 MGD of capacity at the treatment for future allocations. The
table below contains the flow projections as calculated and the figure below is a graphical
representation of this data.
Table 5: Flow Projections
Year
Oakboro Flow
(MGD)
Oakboro
Reserve (MGD)
Stanfield
Flow (MGD)
Locust Flow
(MGD)
Total Flow
(MGD)
2013
0.168
0.200
0.150
0.262
0.780
2014
0.172
0.200
0.150
0.266
0.788
2015
0.175
0.200
0.150
0.270
0.795
2016
0.179
0.200
0.150
0.274
0.803
2017
0.182
0.200
0.150
0.278
0.811
2018
0.186
0.200
0.150
0.282
0.818
2019
0.190
0.200
0.151
0.286
0.827
2020
0.193
0.200
0.154
0.290
0.838
2021
0.197
0.200
0.158
0.294
0.849
2022
0.200
0.200
0.161
0.298
0.859
2023
0;204
0.200
0.164
0.302
0.870
2024
0.207
0.200
0.167
0.306
0.881
2025
0.211
0.200
0.170
0.310
0.892
2026
0.215
0.200
0.173
0.315
0.902
2027
0.218
0.200
0.176
0.319
0.913
2028
0.222
0.200
0.180
0.323
0.924
2029
0.225
0.200
0.183
0.327
0.935
2030
0.229
0.200
0.186
0.331
0.945
2031
0.232
0.200
0.189
0.335
0.956
2032
0.236
0.200
0.192
0.339
0.967
Engineering Alternatives Analysis
Water Treatment Plant Rerating
Town of Oakboro
1
April 2013
TWC No.2938-C
7

1.400
1.200 --
1.000 —
0.800 -
2
0 0.600 -
LL
0.400
0.000 ...__._....-. - _
2010 2015 2020 2025 2030 2035
Year
Flow Projections
—4—Oakboro Flow
1.2 MGD
---Oakboro Reserve
``"`"44" 0.9 MGD Stanfield Flow
0.72 MGD —4 —Locust Flow
--—Total Flow
80% of Permited Flow
Permitted Capacity
Design Capacity
Figure 6: Flow Projections
State regulations require that municipalities begin planning for plant expansion when the flows
reach 80% of the permitted flow. The projected flows are above 80% of the permitted flow from the
beginning of the planning period and exceed the permitted flow at the WWTP in year 2026. Expanding
the permitted capacity of the WWTP to its design capacity of 1.2 MGD would accommodate the
projected wastewater flows throughout the entire planning period.
4.0 Alternatives Analysis
4.1 Connection to an Existing Plant
The Town of Oakboro currently accepts wastewater flow from the Town of Stanfield and the
Town of Locust. Oakboro's WWTP is designed for a capacity of 1.2 MGD although it is currently
permitted for a capacity of 0.9 MGD. The Oakboro WWTP, having the potential capacity available, is
well poised to act a regional WWTP for those municipalities in southwestern Stanly County. It would
make very little sense from a planning perspective to direct the flows from the Oakboro WWTP to
another existing plant, as the Oakboro WWTP is already operation in a regionalized manner. To rerate
the Oakboro WWTP permit to allow operation at its full capacity of 1.2 MGD and to allow the plant to
continue operating as a regional plant would satisfy the intent of the "Connection to an Existing Plant"
alternative. Section 4.4 Surface Water Discharge through the NPDES Program, discusses rerating the
existing treatment plant to its full 1.2 MGD treatment capacity.
4.2 Land Application
The Oakboro WWTP is currently permitted to discharge 0.9 MGD to Rocky River. The Town of
Oakboro wishes to increase the capacity of the plant by 0.30 MGD to its full design capacity of 1.2 MGD.
This alternative examines land application techniques for the disposal of the additional 0.30 MGD of
Engineering Alternatives Analysis April 2013
Water Treatment Plant Rerating TWC No.2938-C
Town of Oakboro 8

(""°)
treated effluent as opposed to increasing the effluent discharge. To land apply the additional effluent it
would require:
(1) Construction of a new 18 MG effluent storage basin.
(2) Construction of a land application pump station with two (2) 1,200 gpm pumps.
(3) Purchase of approximately 220 ac Of land and conversion to spray irrigation fields for the land
application of treated wastewater.
The land application system will be designed per Section .005 of Title 15A, Subchapter 02T of the
North Carolina Administrative Code. State regulation 15A NCAC 02T .0505 requires a minimum degree
of treatment as follows:
• Five Day Biochemical Oxygen Demand <_ 30 mg/L
• Total Suspended Solids 5 30 mg/L
• Ammonia 515 mg/L
• Fecal Coliforms <_ 200 colonies/100 ml
The treatment limits required by the WWTP's permit is more stringent than the limits discussed above.
The effluent will meet the level of treatment required for land application.
The effluent storage basin is sized to store a volume equivalent to sixty (60) days of the average
daily flow. Per 15A NCAC 02T .0505 (d) the basin shall be designed with at least 2 feet of freeboard.
Additionally, the basin shall be synthetically lined per 15A NCAC 02T .0505 (f).
Construction of this alternative is expected to cost $8,783,000.00. The table below contains the
itemized project costs for the construction of this alternative.
Table 6: Land Application Alternative - Project Costs
Description
Units
Total
Quantity
Unit Cost
Extended
Cost
Effluent Storage Basin
CY
38,250
$25.00
$956,250.00
Storage Basin Liner
SF
326,500
$1.05
$342,825.00
Land Application Pumps
LS
1
$325,000.00
$325,000.00
Sprayfield Piping
LS
1
$2,459,000.00
$2,459,000.00
Sprayfield Assemblies
LS
1
$1,979,000.00
$1,979,000.00
Estimated Construction Cost
Contingency
Engineering (Design, CA &CI)
Land Acquisition
ESTIMATED TOTAL PROJECT COST
$6,062,075.00
$606,370.00
$909,555.00
$1,205,000.00
$8,783,000.00
It is estimated that utility costs to run the land application pump station will cost $76,000/year.
Operations and maintenance costs to operate the treatment plant at 1.2 MGD are expected to cost and
additional $500,000 per year.
4.3 Wastewater Reuse
The Oakboro WWTP is located in a rural area, east of the heart of the Town of Oakboro. As such
there are very few potential commercial or industrial reclaimed water users in the vicinity of the plant.
It is more likely that reclaimed water from the WWTP would be used for irrigation purposes. Much the
same as the alternative discussed above this alternative examines water reuse techniques for the
disposal of the additional 0.30 MGD of treated effluent from the WWTP upon the rerating of its
permitted capacity from 0.90 MG to 1.20 MGD. To utilize the additional treated effluent as reclaimed
water it would require:
Engineering Alternatives Analysis April 2013
Water Treatment Plant Rerating TWC No.2938-C
Town of Oakboro 9

(1) Construction of new filters at the WWTP.
(2) Construction of a 1.5 MG side stream detention pond.
(3) Construction of a 9 MG storage basin.
(4) Construction of a reclaimed water pump station with two (2) 1,200 gpm pumps.
(5) Construction of a 200,000 gallon reclaimed water elevated storage tank.
The reclaimed water system will be designed per Title 15A, Subchapter 02U of the North Carolina
Administrative Code. State regulation 15A NCAC 02U Section .0300 requires the following effluent
standards for Type 1 reclaimed water:
• Monthly average BODS of <_ 10 mg/L and a daily maximum BODS of <_ 15 mg/L
• Monthly average Total Suspended Solids 5 5 mg/L and a daily maximum TSS of <_ 10 mg/L
• Monthly average ammonia <_ 4 mg/L and a maximum ammonia of 5 6 mg/L
• Monthly geometric mean E. coli or fecal coliform of <_ 14/100 ml and a daily maximum E. coli or
fecal coliform level of <_ 25/100 MI
• Maximum turbidity of 10 NTUs
Type 1 reclaimed water requires tertiary quality effluent. For this reason, to meet reclaimed water
regulations filters and UV disinfection will have to be installed at the WWTP. A disk filter system was
considered for the purposes of this alternative. A disk filter system consists of a series of vertically
mounted disks composed of two parallel disks which support a cloth filter media. Disk filters have
several advantages over sand filters including lower maintenance costs, small footprints, lower
backwash rates with no downtime required for backwashing, and lower life cycle costs.
The effluent storage basin is sized to store a volume equivalent to thirty (30) days of the average
daily flow. Per 15A NCAC 02U .0402 (g) the basin shall be synthetically Tined.
In this alternative the Town of Oakboro would not be required to purchase the land for disposal of
the treated effluent by irrigation. Instead users would connect to the reclaimed water line as customers
and utilize the reclaimed water. Each customer's use would be metered and they would be charged
accordingly for the reclaimed water used. This alternative assumes that there is a customer base
available that would utilize all of the reclaimed water produced at the WWTP.
Construction of this alternative is expected to cost $4,064,000.00. The table below contains the
itemized project costs for the construction of this alternative.
Table 7: Reclaimed Water Alternative - Project Cost
Description
Units
Total
Quantity
Unit Cost
Extended
Cost
New Disk Filters
LS
1
$694,000.00
$694,000.00
UV Disinfection
LS
1
$570,000.00
$570,000.00
Effluent Storage Basin
CY
17,900
$25.00
$447,500.00
Storage Basin Liner
SF
170,000
$1.05
$178,500.00
Land Application Pumps
LS
1
$325,000.00
$325,000.00
Side Stream Detention Pond
CY
2,100
$25.00
$52,500.00
Detention Pond Liner
SF
32,000
$1.05
$33,600.00
200,000 gallon Elevated Storage Tank
LS
1
$950,000.00
$950,000.00
Estimated Construction Cost
Contingency
Engineering (Design, CA &CI)
ESTIMATED TOTAL PROJECT COST
Engineering Alternatives Analysis
Water Treatment Plant Rerating
Town of Oakboro
$3,251,100.00
$325,160.00
$487,740.00
$4,064,000.00
April 2013
TWC No.2938-C
10

It is estimated that utility costs to run the land application pump station will cost $76,000/year.
Additionally, the town can expect approximately $30,000/year in tank maintenance costs. Operations
and maintenance costs to operate the treatment plant at 1.2 MGD are expected to cost and additional
$500,000 per year.
4.4 Surface Water Discharge through NPDES Program
The Town of Oakboro operates its WWTP, rated for a capacity of 0.90 MGD, under permit
NC0043532. The existing permit specifies the following effluent limitations:
• Monthly average flow 5 0.90 MGD
• Monthly average BOD5 <_ 9.0 mg/L summer and 18.0 mg/L winter; Weekly average BOD5 5 13.5
mg/L summer or 27.0 mg/L winter
• Monthly average total suspended solids 5 30.0 mg/L; weekly average total suspended solids <_ 45.0
mg/L
• Monthly average NH3 as N <_ 3.0 mg/L summer or 6.0 mg/L winter; weekly average NH3 as N 5 9.0
mg/L summer or 18.0 mg/L winter
• Monthly average fecal coliforms <_ 200/100 ml; weekly average fecal coliforms <_ 400/100 ml
• Daily maximum total residual chlorine 5 28 µg/L
The wastewater flow enters the plant by way of the influent pump station. This pump station
houses the manual bar screen, the step screen system, aerated grit chamber, and instrumented flow
measurement. There are four pumps in the influent pump station. The pumps in the influent pump
station transfer the influent to the aeration basins. The aeration basins utilize a total of six (6) 15 hp
floating aerators. Effluent from the aerators flows into a splitter box where flow is separated into three
secondary clarifiers. The two (2) older clarifiers are 28 feet in diameter and the newer clarifier is 50 feet
in diameter. Effluent from the clarifiers is then routed to the chlorine/dechlorine contact chamber for
disinfection. Effluent from the chlorine/dechlorine contact chamber flows to the effluent pump station
where it is then pumped by 12-inch force main to the discharge point into Rocky River. (See Exhibit 2 of
Appendix 1 for a schematic of the WWTP)
Solids collected from the WWTP processes are transferred to the aerobic digester. Two (2) 20 hp
floating aerator and one (1) 15 hp floating mixer are utilized in the digester. Two aerated sludge holding
basins are also used on site. The WWTP includes sludge drying beds but these are not in use at the
plant. Instead the WWTP works with a contract hauler who land applies the digested sludge under
permit WQ0005387 (see Appendix 3).
The WWTP is designed for a capacity of 1.2 MGD though its existing permit limits the capacity to
0.9 MGD. The Town of Oakboro wishes to modify its existing permit to increase the allowable discharge
to 1.2 MGD. Speculative effluent limits were requested from the NPDES Unit of the North Carolina
Division of Water Quality. These speculative limits were as follows:
• Monthly average flow 51.20 MGD
• Monthly average BOD5 510.0 mg/L; weekly average BOD5 5 15.0 mg/L
• Monthly average total suspended residue 5 30.0 mg/L; weekly average total suspended residue 5
45.0 mg/L
• Monthly average NH3 as N <_ 4.0 mg/L; weekly average NH3 as N 5 12.0 mg/L
• Monthly average fecal coliforms <_ 200/100 ml; weekly average fecal coliforms 5 400/100 ml
• Daily maximum total residual chlorine 5 28 mg/L
While the WWTP was originally designed for a capacity of 1.2 MGD there are some minor improvements
to the WWTP that will be required for operation of the plant at 1.2 MGD. The aeration basin currently
utilizes six (6) 15hp floating aerators to provide aeration and mixing. Design calculations indicate that
these aerators are not sufficient for operation of the plant at 1.2 MGD. These aerators will need to be
Engineering Alternatives Analysis April 2013
Water Treatment Plant Rerating TWC No.2938-C
Town of Oakboro 11

replaced with 25 hp floating aerators when the WWTP flow reaches 90% of 0.9 MGD, or 0.81 MGD. The
WWTP utilizes contract haulers to land apply its digested sludge. In order to provide the required sludge
storage capacity required by land application regulations approximately 150,000 gallons of additional
sludge storage capacity is required at the WWTP. Finally, it is recommended that the WWTP add a
polymer feed system to ensure that it continues to meet its permitted limits. Construction of this
alternative is expected to cost $811,000.00. The table below contains the itemized project costs for the
construction of this alternative.
Table 8: Project Cost - Surface Water Discharge Alternative
Description
Units
Total
Quantity
Unit Cost
Extended
Cost
25 hp Aerator
EA
6
$100,000.00
$600,000.00
150,000 gallon Sludge Holding Tank
CY
743
$25.00
$18,575.00
Polymer Feed System
LS
1
$30,000.00
$30,000.00
Estimated Construction Cost
Contingency
Engineering (Design, CA &CI)
ESTIMATED TOTAL PROJECT COST
$648,575.00
$64,970.00
$97,455.00
$811,000.00
Operations and maintenance costs to operate the treatment plant at 1.2 MGD are expected to cost and
additional $520,000 per year. These costs include operating the plant at its full capacity as well as
operating the new polymer feed system.
4.5 Present Worth Analysis
The table below evaluates the present worth of each alternative discussed above. It should be
noted that the Connect to Existing Plant alternative is not feasible as the plant is already operating as a
regional facility. Rerating the WWTP to its full capacity to allow the plant to accept additional flows
from the region supports the intent of the Connect to Existing Plant alternative. The Surface Water
Discharge through NPDES Permit alternative discusses the costs associated with rerating the WWTP to
its full capacity.
Table 9: Present Worth Analysis
Connecting to
Existing Plant
Land
Application
Wastewater
Reuse
Surface Water
Discharge by
NPDES Permit
Project Cost
Not Feasible
$8,783,000.00
$4,064,000.00
$811,000.00
Annual O&M
---
$576,000.00
$606,000.00
$520,000.00
Present Worth
---
$9,409,342.89
$9,899,412.83
$8,494,545.66
Total Present Worth
Not Feasible
$18,192,342.89
$13,963,412.83
$9,305,545.66
5.0 Recommendations
Rerating the existing Oakboro WWTP to its full design capacity of 1.2 MGD is the alternative with
the lowest total present worth costs. Increasing the permitted capacity at the WWTP will allow the
plant to continue to operate as a regional WWTP and to support the expected growth in Stanley County.
Engineering Alternatives Analysis
Water Treatment Plant Rerating
Town of Oakboro
April 2013
TWC No.2938-C
12

DELORME
General Location Map
Oakboro WWTP
Town of Oakboro, NC
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Influent Pump
Station
Aeration Basin No. 1
Clarifier No. 3
Influent
Splitter Box
Splitter Box
Aerobic Digester
To Effluent Discharge
Clarifier
No. 1
--3
Oakboro WWTP Schematic
Exhibit 2
Aeration Basin No. 2
Clarifier
No. 2
Sludge Holding
Tanks
Effluent
Pump
Station
To Disposal by
Contract Hauler
Chlorine/Dechlorine Contact Chamber
Flow path through WWTP
Recycle Lines
Waste Sludge Lines

Appendix 2: NPDES Pe:'mit

Arbi
4,10,4
NDENR
North Carolina Departmer';of Environment and Natural Resource
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
December 29, 2009
The Honorable Joyce H. Little, Mayor
Town of Oakboro
109-A N. Main•Street
P.O. Box 610
Oakboro, North Carolina 28129
Subject: NPDES Permit Isuanc
PerrhiftNC0043532 4:4
Oak&ro*WWTP
Stanly County
Dear Mayor Little:
Dee Freeman
Secretary
In accordance with the application for discharge permit received, the Division is forwarding herewith the
,subject NPDES permit. This permit is issued pursuant to the requirements of North Carolina General Statute
:3-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental
.-rotection Agency dated October 15, 2007 (or as subsequently amended).
The final permit authorizes the Town of Oakboro to discharge wastewater from the Oakboro WWTP to
the Rocky River (outfall 002) and Long Creek (as emergency backup only to outfall 001), class C waters in
the Yadkin -Pee Dee River Basin. The permit includes discharge limitations/or monitoring for flow, BOD5,
ammonia nitrogen, total suspended solids (TSS), dissolved oxygen, total residual chlorine, fecal conform,
copper and zinc.
The Rocky River is not listed on the current North Carolina 303(d) list for impaired streams. However, it
may be listed as an impaired stream on the draft 2008 303 (d) list. That listing will indicate that the stream
does not meet all water quality standards. If the limitations in the current permits for facilities discharging to
Rocky River do not result in improved water quality, removal of discharges to the Rocky River may be
necessary for the health of the stream.
Although the Division believes land clearing and stormwater runoff are the main causes of degradation to
the Rocky River, we will continue to monitor compliance at your facility. If noncompliance with your permit's
effluent limits is shown to be a direct cause of stream degradation, the Division will recommend removal of
your facility's discharge.
Part III of your permit requires you to "continually evaluate all wastewater disposal alternatives and
pursue the most environmentally sound alternative of the reasonably cost effective alternatives" to surface
water discharge. Such an evaluation may help you find an alternative to surface water discharge that is more
appropriate for your facility.
17 Mail Service Center, Raleigh, North Carolina 27699.1617
tion: 512 N. Salisbury St. Raleigh, North Carolina 27604
Jne: 919-807-63001 FAX: [phone] Customer Service:1.877-623-6748
Internet www.ncwaterquality.org
An Equal Opportunity\ Affirmative Action Employer
NO119thCarolina
7Vatura/Iij

Letter to Mayor Little
Page 2
The following procedure has been implemented by DWQ: Total residual chlorine (TRC) compliance
level changed to 50 ug/1. Effective March 1, 2008, the Division received EPA approval to allow a 50 ug/1
TRC compliance level. This change is due to analytical difficulties with TRC measurements. Facilities will
still be required to report actual results on their monthly discharge monitoring report (DMR) submittals,
but for compliance purposes, all TRC values below 50 ug/1 will be treated as zero. Additional information
has been added to a footnote regarding this change on the effluent limitations page.
The following modifications are included in the final permit.
• The effluent limit for total lead (at outfall 001 - Long Creek) has been removed from the permit.
The results of an analysis on submitted data indicated that there would be no reasonable
potential to exceed the stream's water quality standard. There will be no monitoring
requirement for lead in the permit.
• Quarterly monitoring for total zinc has been added to the permit. An analysis on submitted
data indicated a reasonable potential that the water quality action level standard for zinc could
be violated in the receiving stream. Quarterly monitoring allows minimal sampling but will
provide enough data for evaluation at the next permit renewal.
• There has been some modification of the treatment plant components on the supplement to
permit cover sheet. Please review this description for correctness.
• Please note that there have been minor language changes and the addition of a new paragraph
regarding data submittal in special conditions A.3. and A.4. Chronic Toxicity permit limits.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the office of Administrative Hearings,
6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this permit ('''')
shall be final and binding.
Please take notice that this permit is not transferable. The Division may require modification revocation
and reissuance of the permit. This permit does not affect the legal requirements to obtain other permits
which may be required by the Division of Water Quality or permits required by the Division of Land
Resources, Coastal Area Management Act, or any other Federal or Local governmental permits may be
required.
If you have any questions or need additional information, please contact Jacquelyn Nowell at telephone
number [phone].
Sin k - rely, c?ss?
t
een H. Sullins
Attachments
cc: NPDES File/NC0043532
Mooresville Regional Office/Surface Water Protection Section (ecopy)
Aquatic Toxicity Unit (ecopy)
Technical Assistance and Certification Unit/Attn: Steve Reid (ecopy)
Central Files
ESS/Carrie Ruhlman (ecopy)
nt Q-0"

NC0043532
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL
RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1,
other lawful standards and regulations promulgated and adopted by the North Carolina
Environmental Management Commission, and the Federal Water Pollution Control Act, as
amended,
The Town of Oakboro
is hereby authorized to discharge wastewater from a facility located at the
Oakboro Wastewater Treatment Plant
Off of NCSR 1953
East of Oakboro
Stanly County
to receiving waters designated as the Rocky River (outfall 002) and Long Creek (outfall
001) in the Yadkin - Pee Dee River Basin in accordance with effluent limitations,
monitoring requirements, and other conditions set forth in Parts I,11, III and IV hereof.
This permit shall become effective February 1, 2010.
This permit and authorization to discharge shall expire at midnight January 31, 2014
Signed this day December 29, 2009.
c:o en H. Sullins, Director
ivision of Water Quality
I By Authority of the Environmental Management Commission

NC0043532
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this
permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive
authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and
provisions included herein.
The Town of Oakboro is hereby authorized to:
1. Continue to operate a 0.90 MGD wastewater treatment plant consisting of the
following components:
• Manual bar screen
• Step screen system
• Aerated grit chamber
• Instrumented flow measurement
• Aeration basin with mechanical aerators
• Three secondary clarifiers
• Clarifier splitter box with adjustable weirs
• Chlorine contact basin with dechlorination unit
• Aerobic sludge digester with two floating aerators, one floating mixer, a floating
decant mechanism, and additional pumps
• Two aerated sludge holding basins
• Dual sludge drying beds (not in use)
• Dual standby electric generators
The facility is located at the Town of Oakboro WWTP, off of NCSR 1953, east of
Oakboro, Stanly County.
2. Continue to discharge from said treatment works at the locations specified on the
attached map into Rocky River (002) and Long Creek (emergency outfall 001). Both
locations are classified C waters in the Yadkin -Pee Dee River Basin.

L Quad Name: Oakboro
Receiving Stream: Rocky River; Long Creek
Stream Class: C
Subbasin: Yadkin — 03-07-14; 03-07-13
002 [Rocky River]
Latitude: 35°12'41"
Longitude: 80°15'16"
001 [Long Creek]
Latitude: 35°14'OS"
Longitude: 80°16'00"

NC0043532
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS -FINAL
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee
is authorized to discharge from outfall serial number 002 (Rocky River). Such discharges shall be limited
and monitored by the Permittee as specified below:
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow
0.9 MGD
Continuous
Recording
I or E
BOD, 5 day, 20°CZ
Summer)
9.0 mg/1
13.5 mg/1
3/week
Composite
E, I
BODte day, 20°C2
18.0 mg/L
27.0 mg/L
3/week
Composite
E, I
Total Suspended Solids2
30.0 mg/1
45.0 mg/1
3/week
Composite
E, I
NH3 as N (Summer)
3.0 mg/1
9.0 mg/L
3/week
Composite
E
NH3 as N (Winter)
6.0 mg/1
18.0 mg/L
3/week
Composite
E
Dissolved Oxygen3
3/week
Grab
E, U, D
pH4
' 3/week
Grab
E
Fecal Coliform
(geometric mean)
200 / 100 ml
400 / 100 ml
3/week
Grab
E, U, D
Total Residual Chlorines
28 µg/L
3/week
.Grab
E
Total Nitrogen
(NO2 + NO3 + TIN)
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
E
Temperature °C
Daily
Grab
E
Temperature °C
3/week
Grab
U, D
Conductivity
3/week
Grab
U, D
Chronic Toxicity6
Quarterly
Composite
E
Total Copper
2/Month
Composite
E
Total Zinc
Nntac•
Quarterly
Composite
E
1.
Sample locations: E - Effluent, I - Influent, U - Upstream at least 100 feet above the discharge point, D -
Downstream below the discharge point at NCSR 1917. Instream monitoring requirements are waived
as long as the facility retains membership in the YPDRBA. If membership is cancelled, facility will
monitor 3/week during the months of June through September and once per week during the
remaining months of the year.
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective
influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/1.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. The Division shall consider all effluent total residual chlorine values reported below 50 µg/1 to be in
compliance with the permit. However, the Permittee shall continue to record and submit all values
reported by a North Carolina certified laboratory (including field certified), even if these values fall
below 50 µg/1.
6. Chronic Toxicity (Ceriodaphnia) P/F at 4.6%; January, April, July, and October; See Special Condition
A (3) of the Supplement to Effluent Limitations.
Summer April 1- October 31
Winter. November 1- March 31
There shall be no discharge of floating solids or foam visible in other than trace amounts.

NC0043532
A.(2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS -FINAL
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee
is authorized to discharge from emergency backup outfall serial number 001 (Long Creek) in case of a
pump station failure. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow
0.9 MGD
Continuous
Recording
I or E
BOD, 5 day, 20°C2
(Summer)
9.0 mg/1
13.5 mg/1
3/week -
Composite
E, I
BOD, 5 day, 20°C2
(Winter)
18.0 mg/1
27.0 mg/1
3/week
Composite
E, I
Total Suspended Solids2
30.0 mg/1
45.0 mg/1
3/week
Composite
E, I
NH3 as N (Summer)
2.8 mg/1
8.4 mg/L
3/week
Composite
E
-NH3 as N (Winter)
6.0 mg/1
18.0 mg/L
3/week
Composite
E
Dissolved Oxygen3
3/week
Grab
E, U, D
pH4
3/week
Grab
E
Fecal Coliform
(geometric mean)
200 / 100 ml
400 / 100 ml
3/week
Grab
E, U, D
Total Residual Chlorines
28 µg/1
3/week
Grab •
E
Total Nitrogen
(NO2 + NO3 + TKN)
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
E
Temperature °C
Daily
Grab
E
Temperature °C
3/week
Grab
U, D
Conductivity
3/week
Grab
U, D
Chronic Toxicity5
Quarterly
Composite
E
Total Copper
2/Month
Composite
E
Total Zinc
Quarterly
Composite
E
Notes:
1.
Sample locations: E - Effluent, I - Influent, U - Upstream at least 100 feet above the discharge point, D -
Downstream 1.7 miles below the discharge point (at the end of or close to NCSR 1659). Instream
monitoring requirements are waived as long as the facility retains membership in the YPDRBA. If
membership is cancelled, facility will monitor 3/week during the months of June through September
and once per week during the remaining months of the year.
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective
influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/1.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. The Division shall consider all effluent total residual chlorine values reported below 50 µg/1 to be in
compliance with the permit. However, the Permittee shall continue to record and submit all values
reported by a North Carolina certified laboratory (including field certified), even if these values fall
below 50 µg/1.
6. Chronic Toxicity (Ceriodaphnia) P/F at 30%; January, April, July, and October; See Special Condition A
(4) of the Supplement to Effluent Limitations.
Summer. April 1- October 31
Winter: November •1— March 31
There shall be no discharge of floating solids or foam visible in other than trace amounts.

NC0043532
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A (3). CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) Rocky River
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 4.6%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions. The tests will be performed during the months of January, April, July, and October. Effluent sampling for
this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as
described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or
subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection
methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase 11 Chronic
Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed. If reporting pass/fail results using the
parameter code TGP3B, DWQ Form AT-1 (original) is sent to the below address. If reporting Chronic Value results
using the parameter code THP3B, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: Environmental Sciences Section
North Carolina Division of Water Quality
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility
name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the
comment area of the form. The report shall be submitted to the Environmental Sciences Section at the address cited
above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month. Should any test data from this monitoring requirement or tests performed by
the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be
re -opened and modified to include alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such monitoring
shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

NC0043532
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A (4). CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) Long Creek
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 30%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions. The tests will be performed during the months of January, April, July, and October. Effluent sampling for
this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as
described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) pr
subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection
methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed. If reporting pass/fail results using the
parameter code TGP3B, DWQ Form AT-1 (original) is sent to the below address. If reporting Chronic Value results
using the parameter code THP3B, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: Environmental Sciences Section
North Carolina Division of Water Quality
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility
name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the
comment area of the form. The report shall be submitted to the Environmental Sciences Section at the address cited
above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month. Should any test data from this monitoring requirement or tests performed by
the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be
re -opened and modified to include alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such monitoring
shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute art
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring..

NPDES Permit Standard Conditions
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PART II
STANDARD CONDITIONS FOR NPDES PERMITS
Section A. Definitions
2/Month
Samples are collected twice per month with at least ten calendar days between sampling events. These samples shall
be representative of the wastewater discharged during the sample period.
3/Week
Samples are collected three times per week on three separate calendar days. These samples shall be representative of
the wastewater discharged during the sample period.
Act or "the Act"
The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, 33 USC 1251, et.
seq.
Annual Average
The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar year. In the case of fecal
coliform, the geometric mean of such discharges.
Arithmetic Mean
The summation of the individual values divided by the number of individual values.
Bypass
The known diversion of waste streams from any portion of a treatment facility induding the collection system, which
is not a designed or established or operating mode for the facility.
Calendar Day
The period from midnight of one day until midnight of the next day. However, for purposes of this permit, any
consecutive 24-hour period that reasonably represents the calendar day may be used for sampling.
Calendar Week
The period from Sunday through the following Saturday.
Calendar Quarter
One of the following distinct periods: January through March, April through June, July through September, and
October through December.
Composite Sample
A sample collected over a 24-hour period by continuous sampling or combining grab samples of at least 100 ml in
such a manner as to result in a total sample representative of the wastewater discharge during the sample period. The
Director may designate the most appropriate method (specific number and size of aliquots necessary, the time
interval between grab samples, etc.) on a case -by -case basis. Samples may be collected manually or automatically.
Composite samples may be obtained by the following methods:
(1) Continuous: a single, continuous sample collected over a 24-hour period proportional to the rate of flow.
(2) Constant time/variable volume: a series of grab samples collected at equal time intervals over a 24 hour
period of discharge and combined proportional to the rate of flow measured at the time of individual sample
collection, or
(3) Variable time/constant volume: a series of grab samples of equal volume collected over a 24 hour period
.with the time intervals between samples determined by a preset number of gallons passing the sampling
point. Flow measurement between sample intervals shall be determined by use of a flow recorder and
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totalizer, and the preset on interval between sample collection fixed at no greater than 1/24 of the
expected total daily flow at the treatment system, or
(4) Constant time/constant volume: a series of grab samples of equal volume collected over a 24-hour period at
a constant time interval. Use of this method requires prior approval by the Director. This method
may only be used in situations where effluent flow rates vary less than 15 percent. The following
restrictions also apply:
➢ Influent and effluent grab samples shall be of equal size and of no less than 100 milliliters
➢ Influent samples shall not be collected more than once per hour.
➢ Permittees with wastewater treatment systems whose detention time < 24 hours shall collect effluent
grab samples at intervals of no greater than 20 minutes apart during any 24-hour period.
➢ Permittees with wastewater treatment systems whose detention time exceeds 24 hours shall collect
effluent grab samples at least every six hours; there must be a minimum of four samples during a 24-hour
sampling period.
Continuous flow measurement
Flow monitoring that occurs without interruption throughout the operating hours of the facility. Flow shall be
monitored continually except for the infrequent times when there may be no flow or for infrequent maintenance
activities on the flow device.
Daily Discharge
The discharge of a pollutant measured during a calendar day or any 24-hour period that reasonably represents the
calendar day for purposes of sampling. For pollutants measured in units of mass, the "daily discharge" is calculated as
the total mass of the pollutant discharged over the day. The "daily discharge" concentration comprises the mean
concentration for a 24-hour sampling period as either a composite sample concentration or the arithmetic mean of all
grab samples collected during that period. (40 CFR 122.2)
Daily Maximum
The highest "daily discharge" during the calendar month.
Daily Sampling
Parameters requiring daily sampling shall be sampled 5 out of every 7 days per week unless otherwise specified in the
permit. Sampling shall be conducted on weekdays except where holidays or other disruptions of normal operations
prevent weekday sampling. If sampling is required for all seven days of the week for any permit parameter(s), that
requirement will be so noted on the Effluent Limitations and Monitoring Page(s).
DWQ or "the Division"
The Division of Water Quality, Department of Environment and Natural Resources.
EMC
The North Carolina Environmental Management Commission.
EPA
The United States Environmental Protection Agency
Facility Closure
Cessation of all activities that require coverage under this NPDES permit. Completion of facility closure will allow
this permit to be rescinded.
Geometric Mean
The Nth root of the product of the individual values where N = the number of individual values. For purposes of
calculating the geometric mean, values of "0" (or "< [detection level]") shall be considered = 1.
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Grab Sample
Individual samples of at least 100 ml collected over a period of time not exceeding 15 minutes. Grab samples can be
collected manually. Grab samples must be representative of the discharge (or the receiving stream, for instream
samples).
Hazardous Substance
Any substance designated under 40 CFR Part 116 pursuant to Section 311 of the CWA.
Instantaneous flow measurement
A measure of flow taken at the time of sampling, when both the sample and flow will be representative of the total
discharge.
Monthly Average (concentration limit)
The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar month. In the case of fecal
coliform, the geometric mean of such discharges.
Permit Issuing Authority
The Director of the Division of Water Quality.
Quarterly Average (concentration limit)
The average of all samples taken over a calendar quarter.
Severe property damage
Substantial physical damage to property, damage to the treatment facilities which causes them to become inoperable,
or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a
bypass. Severe property damage excludes economic loss caused by delays in production.
Toxic Pollutant
Any pollutant listed as toxic under Section 307(a)(1) of the CWA.
Upset
An incident beyond the reasonable control of the Permittee causing unintentional and temporary noncompliance with
permit effluent limitations and/or monitoring requirements. An upset does not include noncompliance caused by
operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive
maintenance, or careless or improper operation.
Weekly Average (concentration limit)
The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar week. In the case of fecal
coliform, the geometric mean of such discharges.
Section B. General Conditions
1. Duty to Comply
The Permittee must comply with all conditions of this permit Any permit noncompliance constitutes a violation
of the CWA and is grounds for enforcement action; for permit termination, revocation and reissuance, or
modification; or denial of a permit renewal application [40 CFR 122.41].
a. The Permittee shall comply with effluent standards or prohibitions established under section 307(a) of the
CWA for toxic pollutants and with standards for sewage sludge use or disposal established under section
405(d) of the CWA within the time provided in the regulations that establish these standards or prohibitions
or standards for sewage sludge use or disposal, even if the permit has not yet been modified to incorporate
the requirement.
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b. The CWA provides that any person who violates section[s] 301, 302, 306, 307, 308, 318 or 405 of the Act, or
any permit condition or limitation implementing any such sections in a permit issued under section 402, or
any requirement imposed in a pretreatment program approved under sections 402 (a) (3) or 402 (b) (8) of the
Act, is subject to a civil penalty not to exceed $37,500 per day for each violation. [33 USC 1319 (d) and 40
CFR 122.41 (a) (2)]
c. The CWA provides that any person who negligently violates sections 301, 302, 306, 307, 308, 318, or 405 of the
Act, or any condition or limitation implementing any of such sections in a permit issued under section 402 of
the Act, or any requirement imposed in a pretreatment program approved under section 402(a)(3) or
402(b)(8) of the Act, is subject to criminal penalties of $2,500 to $25,000 per day of violation, or
imprisonment of not more than 1 year, or both. In the case of a second or subsequent conviction for a
negligent violation, a person shall be subject to criminal penalties of not more than $50,000 per day of
violation, or by imprisonment of not more than 2 years, or both. [33 USC 1319 (c) (1) and 40 CFR 122.41 (a)
(2)]
d. Any person who knowingly violates such sections, or such conditions or limitations is subject to criminal
penalties of $5,000 to $50,000 per day of violation, or imprisonment for not more than 3 years, or both. In
the case of a second or subsequent conviction for a knowing violation, a person shall be subject to criminal
penalties of not more than $100,000 per day of violation, or imprisonment of not more than 6 years, or both.
[33 USC 1319 (c) (2) and 40 CFR 122.41 (a) (2)]
e. Any person who knowingly violates section 301, 302, 303, 306, 307, 308, 318 or 405 of the Act, or any permit
condition or limitation implementing any of such sections in a permit issued under section 402 of .the Act,
and who knows at that time that he thereby places another person in imminent danger of death or serious
bodily injury, shall, upon conviction, be subject to a fine of not more than $250,000 or imprisonment of not
more than 15 years, or both. In the case of a second or subsequent conviction for a knowing endangerment
violation, a person shall be subject to a fine of not more than $500,000 or by imprisonment of not more than
30 years, or both. An organization, as defined in section 309(c)(3)(B)(iii) of the CWA, shall, upon conviction
of violating the imminent danger provision, be subject to a fine of not more than $1,000,000 and can be fined
up to $2,000,000 for second or subsequent convictions. [40 CFR 122.41 (a) (2)]
f. Under state law, a civil penalty of not more than $25,000 per violation may be assessed against any person
who violates or fails to act in accordance with the terms, conditions, or requirements of a permit. [North
Carolina General Statutes § 143-215.6A]
g•
Any person may be assessed an administrative penalty by the Administrator for violating section 301, 302,
306, 307, 308, 318 or 405 of this Act, or any permit condition or limitation implementing any of such
sections in a permit issued under section 402 of this Act. Administrative penalties for Class I violations are
not to exceed $16,000 per violation, with the maximum amount of any Class I penalty assessed not to exceed
$37,500. Penalties for Class II violations are not to exceed $16,000 per day for each day during which the
violation continues, with the maximum amount of any Class II penalty not to exceed $177,500. [33 USC 1219
(g) (2) and 40 CFR 122.41 (a) (3)]
2. Duty to Mitigate
The Permittee shall take all reasonable steps to minimize or prevent any discharge or sludge use or disposal in
violation of this permit with a reasonable likelihood of adversely affecting human health or the environment [40
CFR 122.41 (d)].
3. Civil and Criminal Liability
Except as provided in permit conditions on "Bypassing" (Part II. C. 4), "Upsets" (Part II. C. 5) and "Power
Failures" (Part II. C. 7), nothing in this permit shall be construed to relieve the Permittee from any
responsibilities, liabilities, or penalties for noncompliance pursuant to NCGS 143-215.3,143-215.6 or Section 309
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of the Federal Act, 33 USC 1319. Furthermore, the Permittee is responsible for consequential damages, such as
fish kills, even though the responsibility for effective compliance may be temporarily suspended.
4. Oil and Hazardous Substance Liability
Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the Permittee
from any responsibilities, liabilities, or penalties to which the Permittee is or may be subject to under NCGS 143-
215.75 et seq. or Section 311 of the Federal Act, 33 USG 1321. Furthermore, the Permittee is responsible for
consequential damages, such as fish kills, even though the responsibility for effective compliance may be
temporarily suspended.
5. Property Rights
The issuance of this permit does not convey any property rights in either real or personal property, or any
exclusive privileges, nor does it authorize any injury to private property or any invasion of personal rights, nor
any infringement of Federal, State or local laws or regulations [40 CFR 122.41 (g)].
6. Onshore or Offshore Construction
This permit does not authorize or approve the construction of any onshore or offshore physical structures or
facilities or the undertaking of any work in any navigable waters.
7. Severability
The provisions of this permit are severable. If any provision of this permit, or the application of any provision of
this permit to any circumstances, is held invalid, the application of such provision to other circumstances, and the
remainder of this permit, shall not be affected thereby [NCGS 150B-23].
8. Duty to Provide Information
The Permittee shall furnish to the Permit Issuing Authority, within a reasonable time, any information which the
Permit Issuing Authority may request to determine whether cause exists for modifying, revoking and reissuing, or
terminating this permit or to determine compliance with this permit. The Permittee shall also furnish to the
Permit Issuing Authority upon request, copies of records required by this permit [40 CFR 122.41 (h)].
9. Duty to Reapply
If the Permittee wishes to continue an activity regulated by this permit after the expiration date of this permit, the
Permittee must apply for and obtain a new permit [40 CFR 122.41 (b)].
10. Expiration of Permit
The Permittee is not authorized to discharge after the expiration date. In order to receive automatic
authorization to discharge beyond the expiration date, the Permittee shall submit such information, forms, and
fees as are required by the agency authorized to issue permits no later than 180 days prior to the expiration date.
Any Permittee that has not requested renewal at least 180 days prior to expiration, or any Permittee that does not
have a permit after the expiration and has not requested renewal at least 180 days prior to expiration, will subject
the Permittee to enforcement procedures as provided in NCGS 143-215.6 and 33 USC 1251 et. seq.
11. Signatory Requirements
All applications, reports, or information submitted to the Permit Issuing Authority shall be signed and certified
[40 CFR 122.41 (k)].
a. All permit applications shall be signed as follows:
(1) For a corporation: by a responsible corporate officer. For the purpose of this Section, a responsible
corporate officer means: (a) a president, secretary, treasurer or vice president of the corporation in
charge of a principal business function, or any other person who performs similar policy or decision
making functions for the corporation, or (b) the manager of one or more manufacturing, production, or
operating facilities, provided, the manager is authorized to make management decisions which govern the
operation of the regulated facility including having the explicit or implicit duty of making major capital
investment recommendations, and initiating and directing other comprehensive measures to assure long
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term environmental compliance with environmental laws and regulations; the manager can ensure that
the necessary systems are established or actions taken to gather complete and accurate information for
permit application requirements; and where authority to sign documents has been assigned or delegated
to the manager in accordance with corporate procedures .
For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or
For a municipality, State, Federal, or other public agency: by either a principal executive officer or
ranking elected official [40 CFR 122.22].
b. All reports required by the permit and other information requested by the Permit Issuing Authority shall be
signed by a person described in paragraph a. above or by a duly authorized representative of that person. A
person is a duly authorized representative only if
1. The authorization is made in writing by a person described above;
2. The authorization specified either an individual or a position having responsibility for the overall
operation of the regulated facility or activity, such as the position of plant manager, operator of a well or
well field, superintendent, a position of equivalent responsibility, or an individual or position having
overall responsibility for environmental matters for the company. (A duly authorized representative may
thus be either a named individual or any individual occupying a named position.); and
3. The written authorization is submitted to the Permit Issuing Authority [40 CFR 122.22]
c. Changes to authorization: If an authorization under paragraph (b) of this section is no longer accurate
because a different individual or position has responsibility for the overall operation of the facility, a new
authorization satisfying the requirements of paragraph (b) of this section must be submitted to the Director
prior to or together with any reports, information, or applications to be signed by an authorized
representative [40 CFR 122.22]
d. Certification. Any person signing a document under paragraphs a. or b. of this section shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE
ACCEPTED:
"i certify, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate
the information submitted Based on my inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the information submitted is, to the best of my knowledge and
belief, true, accurate, and complete. i am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.'
12. Permit Actions
This permit may be modified, revoked and reissued, or terminated for cause. The filing of a request by the
Permittee for a permit modification, revocation and reissuance, or termination, or a notification of planned
changes or anticipated noncompliance does not stay any permit condition [40 CFR 122.41 (f)]. •
13. Permit Modification. Revocation and Reissuanceor Termination
The issuance of this permit does not prohibit the permit issuing authority from reopening and modifying the
permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws, rules, and regulations
contained in Title 40, Code of Federal Regulations, Parts 122 and 123; Tide 15A of the North Carolina
Administrative Code, Subchapter 2H.0100; and North Carolina General Statute 143-215.1 et. al.
14. Annual Administering and Compliance Monitoring Fee Requirements
The Permittee must pay the annual administering and compliance monitoring fee within thirty days after being
billed by the Division. Failure to pay the fee in a timely manner in accordance with 15A NCAC 2H.0105 (b) (2)
may cause this Division to initiate action to revoke the permit.
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Section C. Operation and Maintenance of Pollution Controls
1. Certified Operator
Upon classification of the permitted facility by the Certification Commission, the Permittee shall employ a
certified water pollution control treatment system operator in responsible charge (ORC) of the water pollution
control treatment system. Such operator must hold a certification of the grade equivalent to or greater than the
classification assigned to the water pollution control treatment system by the Certification Commission. The
Permittee must also employ one or more certified Back-up ORCs who possess a currently valid certificate of the
type of the system. Back-up ORCs must possess a grade equal to (or no more than one grade Less than) the grade
of the system [15A NCAC 8G.0201].
The ORC of each Class I facility must:
> Visit the facility as often as is necessary to insure proper operation of the treatment system; the treatment
facility must be visited at least weekly
> Comply with all other conditions of 15A NCAC 8G.0204.
The ORC of each Class II, III and IV facility must
> Visit the facility as often as is necessary to insure proper operation of the treatment system; the treatment
facility must be visited at least five days per week, excluding holidays
> Properly manage and document daily operation and maintenance of the facility
> Comply with all other conditions of 15A NCAC 8G.0204.
Once the facility is classified, the Permittee shall submit a letter to the Certification Commission designating the
operator in responsible charge:
a. Within 60 calendar days prior to wastewater being introduced into a new system
b. Within 120 calendar days of:
> Receiving notification of a change in the classification of the system requiring the designation of a
new ORC and back-up ORC
➢ A vacancy in the position of ORC or back-up ORC.
2. Proper Operation and Maintenance
The Permittee shall at all times provide the operation and maintenance resources necessary to operate the existing
facilities at optimum efficiency. The Permittee shall at all times properly operate and maintain all facilities and
systems of treatment and control (and related appurtenances) which are installed or used by the Permittee to
achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate
laboratory controls and appropriate quality assurance procedures. This provision requires the Permittee to install
and operate backup or auxiliary facilities only when necessary to achieve compliance with the conditions of the
permit [40 CFR 122.41 (e)].
NOTE: Properly and offiriilly designated operators are fully responsible for all proper operation and
maintenance of the facility, and all documentation required thereof, whether acting as a contract operator
[subcontractor] or a member of the Permittee's staff.
3. Need to Halt or Reduce not a Defense
It shall not be a defense for a Permittee in an enforcement action that it would have been necessary to halt or
reduce the permitted activity in order to maintain compliance with the condition of this permit [40 CFR 122.41
(c)].
4. Bypassing of Treatment Facilities
a. Bypass not exceeding limitations [40 CFR 122.41 (m) (2)]
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The Permittee may allow any bypass to occur which does not cause effluent limitations to be exceeded, but
only if it also is for essential maintenance to assure efficient operation. These bypasses are not subject to the
provisions of Paragraphs b. and c. of this section.
b. Notice [40 CFR 122.41 (m) (3)]
(1) Anticipated bypass. If the Permittee knows in advance of the need for a bypass, it shall submit prior
• notice, if possible at least ten days before the date of the bypass; including an evaluation of the
anticipated quality and effect of the bypass.
(2) Unanticipated bypass. The Permittee shall submit notice of an unanticipated bypass as required in Part
II. E. 6. (24-hour notice).
c. Prohibition of Bypass
(1) Bypass from the treatment facility is prohibited and the Permit Issuing Authority may take enforcement
action against a Permittee for bypass, unless:
(A) Bypass was unavoidable to prevent loss of life, personal injury or severe property damage;
(B) There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities,
retention of untreated wastes or maintenance during normal periods of equipment downtime. This
condition is not satisfied if adequate backup equipment should have been installed in the exercise of
reasonable engineering judgment to prevent a bypass which occurred during normal periods of
equipment downtime or preventive maintenance; and
(C) The Permittee submitted notices as required under Paragraph b. of this section.
(2) Bypass from the collection system is prohibited and the Permit Issuing Authority may take enforcement
action against a Permittee for a bypass as provided in any current or future system -wide collection system
permit associated with the treatment facility.
(3) The Permit Issuing Authority may approve an anticipated bypass, after considering its adverse effects, if
the Permit Issuing Authority determines that it will meet the three conditions listed above in Paragraph c.
(1) of this section.
5. Upsets
a. Effect of an upset [40 CFR 122.41 (n) (2)]: An upset constitutes an affirmative defense to an action
brought for noncompliance with such technology based permit effluent limitations if the requirements of
paragraph b. of this condition are met. No determination made during administrative review of claims that
noncompliance was caused by upset, and before an action for noncompliance, is final administrative action
subject to judicial review.
b. Conditions necessary for a demonstration of upset: Any Pertnittee who wishes to establish the
affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs, or
other relevant evidence that
(1) An upset occurred and that the Permittee can identify the cause(s) of the upset;
(2) The Permittee facility was at the tune being properly operated; and
(3) The Permittee submitted notice of the upset as required in Part II. E. 6. (b) of this permit.
(4) The Permittee complied with any remedial measures required under Part II. B. 2. of this permit.
c. Burden of proof [40 CFR 122.41 (n) (4)]: The Permittee seeking to establish the occurrence of an upset
has the burden of proof in any enforcement proceeding.
6. Removed Substances
Solids, sludges, filter backwash, or other pollutants removed in the course of treatment or control of wastewaters
shall be utilized/disposed of in accordance with NCGS 143-215.1 and in a manner such as to prevent any pollutant
from such materials from entering waters of the State or navigable waters of the United States. The Permittee
shall comply with all existing Federal regulations governing the disposal of sewage sludge. Upon promulgation of
40 CFR Part 503, any permit issued by the Permit Issuing Authority for the utilization/disposal of sludge may be
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reopened and modified, or revoked and reissued, to incorporate applicable requirements at 40 CFR 503. The
Permittee shall comply with applicable 40 CFR 503 Standards for the Use and Disposal of Sewage Sludge (when
promulgated) within the time provided in the regulation, even if the permit is not modified to incorporate the
requirement. The Permittee shall notify the Permit Issuing Authority of any significant change in its sludge use
or disposal practices.
7. Power Failures
The Permittee is responsible for maintaining adequate safeguards (as required by 15A NCAC 2H.0124) to prevent
the discharge of untreated or inadequately treated wastes during electrical power failures either by means of
alternate power sources, standby generators or retention of inadequately treated effluent.
Section D. Monitoring and Records
1. Representative Sampling
Samples collected and measurements taken, as required herein, shall be characteristic of the volume and nature of
the permitted discharge. Samples collected at a frequency less than daily shall be taken on a day and time that is
characteristic of the discharge over the entire period the sample represents. All samples shall be taken at the
monitoring points specified in this permit and, unless otherwise specified, before the effluent joins or is diluted
by any other wastestream, body of water, or substance. Monitoring points shall not be changed without
notification to and the approval of the Permit Issuing Authority [40 CFR 122.41 (j)].
2. Reporting
Monitoring results obtained during the previous month(s) shall be summarized for each month and reported on a
monthly Discharge Monitoring Report (DMR) Form (MR 1, 1.1, 2, 3) or alternative forms approved by the
Director, postmarked no later than the last calendar day of the month following the completed reporting period.
The first DMR is due on the last day of the month following the issuance of the permit or in the case of a new
facility, on the last day of the month following the commencement of discharge. Duplicate signed copies of
these, and all other reports required herein, shall be submitted to the following address:
NC DENR / Division of Water Quality / Water Quality Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
3. Flow Measurements
Appropriate flow measurement devices and methods consistent with accepted scientific practices shall be selected
and used to ensure the accuracy and reliability of measurements of the volume of monitored discharges. The
devices shall be installed, calibrated and maintained to ensure that the accuracy of the measurements is consistent
with the accepted capability of that type of device. Devices selected shall be capable of measuring flows with a
maximum deviation of less than 10% from the true discharge rates throughout the range of expected discharge
volumes. Flow measurement devices shall be accurately calibrated at a minimum of once per year and maintained
to ensure .that the accuracy of the measurements is consistent with the accepted capability of that type of device.
The Director shall approve the flow measurement device and monitoring location prior to installation.
Once -through condenser cooling water flow monitored by pump logs, or pump hour meters as specified in Part I
of this permit and based on the manufacturer's pump curves shall not be subject to this requirement.
4. Test Procedures
Laboratories used for sample analysis must be certified by the Division. Permittees should contact the Division's
<'"li*s Laboratory Certification Section (919 733-3908 or http://h2o.enr.state.nc.us/lab/cert.htm) for information
regarding laboratory certifications.
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Personnel conducting testing of field -certified parameters must hold the appropriate field parameter
certifications.
Test procedures for the analysis of pollutants shall conform to the EMC regulations (published pursuant to
NCGS 143-215.63 et. seq.), the Water and Air Quality Reporting Acts, and to regulations published pursuant to
Section 304(g), 33 USC 1314, of the CWA (as amended), and 40 CFR 136; or in the case of sludge use or disposal,
approved under 40 CFR 136, unless otherwise specified in 40 CFR 503, unless other test procedures have been
specified in this permit [40 CFR 122.41].
To meet the intent of the monitoring required by this permit, all test procedures must produce minimum
detection and reporting levels that are below the permit discharge requirements and all data generated must be
reported down to the minimum detection or lower reporting level of the procedure. If no approved methods are
determined capable of achieving minimum detection and reporting levels below permit discharge requirements,
then the most sensitive (method with the lowest possible detection and reporting level) approved method must
be used.
5. Penalties for Tampering
The CWA provides that any person who falsifies, tampers with, or knowingly renders inaccurate, any monitoring
device or method required to be maintained under this permit shall, upon conviction, be punished by a fine of
not more than $10,000 per violation, or by imprisonment for not more than two years per violation, or by both.
If a conviction of a person is for a violation committed after a first conviction of such person under this
paragraph, punishment is a fine of not more than $20,000 per day of violation, or by imprisonment of not more
than 4 years, or both [40 CFR 122.41].
6. Records Retention
Except for records of monitoring information required by this permit related to the Permittee's sewage sludge
use and disposal activities, which shall be retained for a period of at least five years (or longer as required by 40
CFR 503), the Permittee shall retain records of all monitoring information, including.
.> all calibration and maintenance records
> all original strip chart recordings for continuous monitoring instrumentation
➢ copies of all reports required by this permit
➢ copies of all data used to complete the application for this permit
These records or copies shall be maintained for a period of at least 3 years from the date of the sample,
measurement, report or application. This period may be extended by request of the Director at any time [40 CFR
122.41].
7. Recording Results
For each measurement or sample taken pursuant to the requirements of this permit, the Permittee shall record
the following information [40 CFR 122.41]:
a. The date, exact place, and time of sampling or measurements;
b. The individual(s) who performed the sampling or measurements;
c. The date(s) analyses were performed;
d. The individual(s) who performed the analyses;
e. The analytical techniques or methods used; and
f. The results of such analyses.
8. Inspection and Entry
The Permittee shall allow the Director, or an authorized representative (including an authorized contractor acting
as a representative of the Director), upon the presentation of credentials and other documents as may be required
by law, to;
a. Enter upon the Permittee's premises where a regulated facility or activity is located or conducted, or where
records must be kept under the conditions of this permit;
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b. Have access to and copy, at reasonable times, any records that must be kept under the conditions of this
permit;
c. Inspect at reasonable times any facilities, equipment ('including monitoring and control equipment), practices,
or operations regulated or required under this permit; and
d. Sample or monitor at reasonable times, for the purposes of assuring permit compliance or as otherwise
authorized by the CWA, any substances or parameters at any location [40 CFR 122.41 (i)].
Section E Reporting Requirements
1. Change in Discharge
All discharges authorized herein shall be consistent with the terms and conditions of this permit. The discharge
of any pollutant identified in this permit more frequently than or at a level in excess of that authorized shall
constitute a violation of the permit.
2. Planned Changes
The Permittee shall give notice to the Director as soon as possible of any planned physical alterations or
additions to the permitted facility [40 CFR 122.41 (1)]. Notice is required only when:
a. The alteration or addition to a permitted facility may meet one of the criteria for new sources at 40 CFR
122.29 (b); or
b. The alteration or addition could significantly change the nature or increase the quantity of pollutants
discharged. This notification applies to pollutants subject neither to effluent limitations in the permit, nor to
notification requirements under 40 CFR 122.42 (a) (I).
c. The alteration or addition results in a significant change in the Permittee's sludge use or disposal practices,
and such alteration, addition or change may justify the application of permit conditions that are different
from or absent in the existing permit, including notification of additional use or disposal sites not reported
during the permit application process or not reported pursuant to an approved land application plan. •
3. Anticipated Noncompliance
The Permittee shall give advance notice to the Director of any planned changes to the permitted facility or other
activities that might result in noncompliance with the permit [40 CFR 122.41 (1) (2)].
4. Transfers
This permit is not transferable to any person without approval from the Director. The Director may require
modification or revocation and reissuance of the permit to document the change of ownership. Any such action
may incorporate other requirements as may be necessary under the CWA [40 CFR 122.41 (1) (3)].
5. Monitoring Reports
Monitoring results shall be reported at the intervals specified elsewhere in this permit [40 CFR 122.41 (1) (4)].
a. Monitoring results must be reported on a Discharge Monitoring Report (DMR) (See Part II. D. 2) or forms
provided by the Director for reporting results of monitoring of sludge use or disposal practices.
b. If the Permittee monitors any pollutant more frequently than required by this permit, the results of such
monitoring shall be included in the calculation and reporting of the data submitted on the DMR.
6. Twenty-four Hour Reporting
a. The Permittee shall report to the Director or the appropriate Regional Office any noncompliance that
potentially threatens public health or the environment. Any information shall be provided orally within 24
hours from the time the Permittee became aware of the circumstances. A written submission shall also be
provided within 5 days of the time the Permittee becomes aware of the circumstances. The written
submission shall contain a description of the noncompliance, and its cause; the period of noncompliance,
including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is
expected to continue; and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the
noncompliance [40 CFR 122.41 (1) (6)].
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b. The Director may waive the written report on a case -by -case basis for reports under this section if the oral
report has been received within 24 hours.
c. Occurrences outside normal business hours may also be reported to the Division's Emergency Response
personnel at [phone], [phone] or [phone].
7. Other Noncompliance
The Permittee shall report all instances of noncompliance not reported under Part II. E. 5 and 6. of this permit at
the time monitoring reports are submitted. The reports shall contain the information listed in Part II. E. 6. of
this permit [40 CFR 122.41 (1) (7)].
8. Other Information
Where the Permittee becomes aware that it failed to submit any relevant facts in a permit application, or
submitted incorrect information in a permit application or in any report to the Director, it shall promptly submit
such facts or information [40 CFR 122.41 (1) (8)].
9. Noncompliance Notification
The Permittee shall report by telephone to either the central office or the appropriate regional office of the
Division as soon as possible, but in no case more than 24 hours or on the next working day following the
occurrence or first knowledge of the occurrence of any of the following.
a. Any occurrence at the water pollution control facility which results in the discharge of significant amounts of
wastes which are abnormal in quantity or characteristic, such as the dumping of the contents of a sludge
digester, the known passage of a slug of hazardous substance through the facility; or any other unusual
circumstances.
b. Any process unit failure, due to known or unknown reasons, that render the facility incapable of adequate
wastewater treatment such as mechanical or electrical failures of pumps, aerators, compressors, etc.
c. Any failure of a pumping station, sewer line, or treatment facility resulting in a by-pass without treatment of
all or any portion of the influent to such station or facility.
Persons reporting such occurrences by telephone shall also file a written report within 5 days following first
knowledge of the occurrence.
10. Availability of Reports
Except for data determined to be confidential under NCGS 143-215.3 (a)(2) or Section 308 of the Federal Act, 33
USC 1318, all reports prepared in accordance with the terms shall be available for public inspection at the offices
of the Division. As required by the Act, effluent data shall not be considered confidential. Knowingly making
any false statement on any such report may result in the imposition of criminal penalties as provided for in
NCGS 143-215.1 (b)(2) or in Section 309 of the Federal Act.
11. Penalties for Falsification of Reports
The CWA provides that any person who knowingly makes any false statement, representation, or certification in
any record or other document submitted or required to be maintained under this permit, including monitoring
reports or reports of compliance or noncompliance shall, upon conviction, be punished by a fine of not more
than $25,000 per violation, or by imprisonment for not more than two years per violation, or by both [40 CFR
122.41].
12. Annual Performance Rep its
Permittees who own or operate facilities that collect or treat municipal or domestic waste shall provide an annual
report to the Permit Issuing Authority and to the users/customers served by the Permittee (NCGS 143-215.1C).
The report shall summarize the performance of the collection or treatment system, as well as the extent to which
the facility was compliant with applicable Federal or State laws, regulations and rules pertaining to water quality.
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The report shall be provided no later than sixty days after the end of the calendar or fiscal year, depending upon
which annual period is used for evaluation.
The report shall be sent to:
NC DENR / DWQ / Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
PART III
OTHER REQUIREMENTS
Section A. Construction
The Permittee shall not commence construction of wastewater treatment facilities, nor add to the plant's treatment
capacity, nor change the treatment process(es) utilized at the treatment plant unless the Division has issued an
Authorization to Construct (AtC) permit. Issuance of an AtC will not occur until Final Plans and Specifications for
the proposed construction have been submitted by the Permittee and approved by the Division.
Section B. Groundwater Monitoring
The Permittee shall, upon written notice from the Director, conduct groundwater monitoring as may be required to
determine the compliance of this NPDES permitted facility with the current groundwater standards.
Section C. Changes in Discharges of Toxic Substances
The Permittee shall notify the Permit Issuing Authority as soon as it knows or has reason to believe (40 CFR 122.42):
a. That any activity has occurred or will occur which would result in the discharge, on a routine or frequent
basis, of any toxic pollutant which is not limited in the permit, if that discharge will exceed the highest of the
following "notification levels";
(1) One hundred micrograms per liter (100 µg/L);
(2) Two hundred micrograms per liter (200 µg/L) for acrolein and acrylonitrile; five hundred micrograms
per liter (500 µg/L) for 2.4-dinitrophenol and for 2-methyl-4.6-dinitrophenol; and one milligram per liter
(1 mg/L) for antimony;
(3) Five times the maximum concentration value reported for that pollutant in the permit application.
b. That any activity has occurred or will occur which would result in any discharge, on a non -routine or
infrequent basis, of a toxic pollutant which is not limited in the permit, if that discharge will exceed the
highest of the following "notification levels";
(I) Five hundred micrograms per liter (500 µg/L);
(2) One milligram per liter (1 mg/L) for antimony;
(3) Ten times the maximum concentration value reported for that pollutant in the permit application.
Section D. Evaluation of Wastewater Discharge Alternatives
The Permittee shall evaluate all wastewater disposal alternatives and pursue the most environmentally sound
alternative of the reasonably cost effective alternatives. If the facility is in substantial non-compliance with the terms
and conditions of the NPDES permit or governing rules, regulations or laws, the Permittee shall submit a report in
such form and detail as required by the Division evaluating these alternatives and a plan of action within 60 days of
notification by the Division.
Section E. Facility Closure Requirements .
f,.. The Permittee must notify the Division at least 90 days prior to the closure of any wastewater treatment system
covered by this permit. The Division may require specific measures during 4eactivation pf the system to prevent
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adverse impacts to waters of the State. This permit cannot be rescinded while any activities requiring this permit
continue at the permitted facility.
PART IV
SPECIAL CONDITIONS FOR MUNICIPAL FACILITIES
Section A. Definitions
In addition to the definitions in Part II of this permit, the following definitions apply to municipal facilities:
Indirect Discharge or Industrial User
Any non -domestic source that discharges wastewater containing pollutants into a POTW regulated under section
307(b), (c) or (d) of the CWA. [40 CFR 403.3 (b) (i) and G)]
Interference
Inhibition or disruption of the POTW treatment processes; operations; or its sludge process, use, or disposal which
causes or contributes to a violation of any requirement of the POTW's NPDES Permit or prevents sewage sludge use
or disposal in compliance with specified applicable State and Federal statutes, regulations, or permits. [15A NCAC
2H.0903 (b) (13)]
Pass Through
A discharge which exits the POTW into waters of the State in quantities or concentrations which, alone or with
discharges from other sources, causes a violation, including an increase in the magnitude or duration of a violation, of
the POTW's NPDES permit, or of an instream water quality standard. [1SA NCAC 2H.0903 (b) (23)]
Publicly Owned Treatment Works (POTW)
A treatment works as defined by Section 212 of the CWA, owned by a State or local government entity. This
definition includes any devices and systems used in the storage, treatment, recycling and reclamation of municipal
sewage or industrial wastes of a liquid nature. It also includes sewers, pipes, and other conveyances only if they
convey wastewater to a POTW. The term also means the local government entity, or municipality, as defined in
section 502(4) of the CWA, which has jurisdiction over indirect discharges to and the discharges from such a
treatment works. [15A NCAC 2H.0903 (b) (27)]
"Significant Industrial User" or "SIU"
An industrial user that discharges wastewater into a publicly owned treatment works and that [15A NCAC 2H.0903
(b) (34)]:
(a)
(b)
(c)
(d)
discharges an average of 25,000 gallons or more per day of process wastewater to the POTW (excluding
sanitary, noncontact cooling and boiler blowdown wastewaters) or;
contributes more than 5 percent of the design flow of the POTW treatment plant or more than 5 percent of
the maximum allowable headworks loading of the POTW treatment plant for any pollutant of concern, or;
is required to meet a national categorical pretreatment standard, or;
is, regardless of Parts (a), (b), and (c) of this definition, otherwise determined by the POTW, the Division, or
the EPA to have a reasonable potential for adversely affecting the POTW's operation or for violating any
pretreatment standard or requirement or POTW's receiving stream standard, or to limit the POTW's sludge
disposal options.
Section B. Publicly Owned Treatment Works (POTWs)
All POTWs are required to prevent the introduction of pollutants into the POTW which will interfere with the
operation of the POTW, including interference with its use or disposal of municipal sludge, or pass through the
treatment works or otherwise be incompatible with such treatment works. [40 CFR 403.2]
All POTWs must provide adequate notice to the Director of the following [40 CFR 122.42 (b)]:
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1. Any new introduction of pollutants into the POTW from an indirect discharger, including pump and
hauled waste, which would be subject to section 301 or 306 of CWA if it were directly discharging those
pollutants; and
2. Any substantial change in the volume or character of pollutants being introduced by an indirect discharger
as influent to that POTW at the time of issuance of the permit
3. For purposes of this paragraph, adequate notice shall include information on (1) the quality and quantity of
effluent introduced into the POTW, and (2) any anticipated impact that may result from the change of the
quantity or quality of effluent to be discharged from the POTW.
Section C. Municipal Control of Pollutants from Industrial Users.
1. Effluent limitations are listed in Part I of this permit. Other pollutants attributable to inputs from industries
using the municipal system may be present in the Permittee's discharge. At such time as sufficient information
becomes available to establish limitations for such pollutants, this permit may be revised to specify effluent
limitations for any or all of such other pollutants in accordance with best practicable technology or water
quality standards.
2. Prohibited Discharges
a. Under no circumstances shall the Permittee allow introduction of pollutants or discharges into the waste
treatment system or waste collection system which cause or contribute to Pass Through or Interference
as defined in 15A NCAC 2H.0900 and 40 CFR 403. [40 CFR 403.5 (a) (1)]
b. Under no circumstances shall the Permittee allow introduction of the following wastes in the waste
treatment or waste collection system [40 CFR 403.5 (b)]:
1. Pollutants which create a fire or explosion hazard in the POTW, including, but not limited to,
wastestreams with a dosed cup flashpoint of less than 140 degrees Fahrenheit or 60. degrees
Centigrade using the test methods specified in 40 CFR 261.21;
2. Pollutants which cause corrosive structural damage to the POTW, but in no case discharges with
pH lower than 5.0, unless the works is specifically designed to accommodate such discharges;
3. Solid or viscous pollutants in amounts which cause obstruction to the flow in the POTW resulting
in Interference;
4. Any pollutant, induding oxygen demanding pollutants (BOD, etc.) released in a Discharge at a
flow rate and/or pollutant concentration which will cause Interference with the POTW;
5. Heat in amounts which will may inhibit biological activity in the POTW resulting in Interference,
but in no case heat in such quantities that the temperature at the POTW Treatment Plant exceeds
40°C (104°F) unless the Division, upon request of the POTW, approves alternate temperature
limits;
6. Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will
cause interference or pass through;
7. Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a
quantity that may cause acute worker health and safety problems;
8. Any trucked or hauled pollutants, except at discharge points designated by the POTW.
c. The Permittee shall investigate the source of all discharges into the WWTP, including slug loads and .
other unusual discharges, which have the potential to adversely impact the permittee's Pretreatment
Program and/or the operation of the WWTP.
The Permittee shall report such discharges into the WWTP to the Director or the appropriate Regional
Office. Any information shall be provided orally within 24 hours from the time the Permittee became
aware of the circumstances. A written submission shall also be provided within 5 days of the time the
Permittee becomes aware of the circumstances. The written submission shall contain a description of
the discharge, the investigation into possible sources; the period of the discharge, including exact dates
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and times; and if the discharge has not ceased, the anticipated time it is expected to continue; and steps
taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance,
3. With regard to the effluent requirements listed in Part I of this permit, it may be necessary for the Permittee to
supplement the requirements of the Federal Pretreatment Standards (40 CFR, Part 403) to ensure compliance
by the Permittee with all applicable effluent limitations. Such actions by the Permittee may be necessary
regarding some or all of the industries discharging to the municipal system.
4. The Permittee shall require any industrial discharger sending its effluent to the permitted system to meet
Federal Pretreatment Standards promulgated in response to Section 307(b) of the Act as amended (which
includes categorical standards and locally derived limits and narrative requirements). Prior to accepting
wastewater from any significant industrial user, the Permittee shall either develop and submit to the Division a
new Pretreatment Program or a modification of an existing Pretreatment Program, for approval as required
under section D below as well as 15A NCAC 2H.0907 (a) and (b). [40 CFR 122.44 (j) (2)]
5. This permit shall be modified, or alternatively, revoked and reissued, to incorporate or modify an approved
POTW Pretreatment Program or to include a compliance schedule for the development of a POTW
Pretreatment Program as required under Section 402 (b) (8) of the CWA and implementing regulations or by
the requirements of the approved State pretreatment program, as appropriate.
Section D. Pretreatment Programs
Under authority of sections 307 (b) and (c) and 402 (b) (8) of the CWA and implementing regulations 40 CFR 403,
North Carolina General Statute 143-215.3 (14) and implementing regulations 15A NCAC 2H.0900, and in accordance
with the approved pretreatment program, all provisions and regulations contained and referenced in the Pretreatment
Program Submittal are an enforceable part of this permit. [40 CFR 122.44 G) (2)]
The Permittee shall operate its approved pretreatment program in accordance with Section 402 (b) (8) of the CWA,
40 CFR 403, 15A NCAC 2H.0900, and the legal authorities, policies, procedures, and financial provisions contained
in its pretreatment program submission and Division approved modifications thereof. Such operation shall include
but is not limited to the implementation of the following conditions and requirements. Terms not defined in Part II
or Part IV of this permit are as defined in 15A NCAC 2H.0903 and 40 CFR 403.3.
1. Sewer Use Ordinance (SUO)
The Permittee shall maintain adequate legal authority to implement its approved pretreatment program. [15A
NCAC 2H.0905 and .0906; 40 CFR 403.8 (f) (1) and 403.9 (1), (2)]
2. Industrial Waste Survey (IWS)
The perrnittee shall implement an IWS consisting of the survey of users of the POTW, as required by 40 CFR
403.8 (f) (2) (i-iii) and 15A NCAC 2H.0905 [also 40 CFR 122.44 (j) (1)], including identification of all industrial
users and the character and amount of pollutants contributed to the POTW by these industrial users and
identification of those industrial users meeting the definition of SIU. The Permittee shall submit a summary of
its IWS activities to the Division at least once every five years, and as required by the Division. The IWS
submission shall indude a summary of any investigations conducted under paragraph B, 2, c, of this Part.
3. Monitoring Plan
The Permittee shall implement a Division -approved Monitoring Plan for the collection of facility specific data
to be used in a wastewater treatment plant Headworks Analysis (HWA) for the development of specific
pretreatment local limits. Effluent data from the Plan shall be reported on the DMRs (as required by Part II,
Section D, and Section E.5.). [15A NCAC 2H.0906 (b) (2) and .0905]
4. Headworks Analysis (1-IWA) and Local Limits
The Permittee shall obtain Division approval of a HWA at least once every five years, and as required by the
Division. Within 180 days of the effective date of this permit (or any subsequent permit modification) the
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Permittee shall submit to the Division a written technical evaluation of the need to revise local limits (i.e., an
updated HWA or documentation of why one is not needed) [40 CFR 122.44]. The Permittee shall develop, in
accordance with 40 CFR 403.5 (c) and 15A NCAC 2H.0909, specific Local Limits to implement the
prohibitions listed in 40 CFR 403.5 (a) and (b) and ISA NCAC 2H.0909.
5. Industrial User Pretreatment Permits (ILTP) & Allocation Tables
In accordance with NCGS 143-215.1, the Permittee shall issue to all significant industrial users, permits for
operation of pretreatment equipment and discharge to the Permittee's treatment works. These permits shall
contain limitations, sampling protocols, reporting requirements, appropriate standard and special conditions,
and compliance schedules as necessary for the installation of treatment and control technologies to assure that
their wastewater discharge will meet all applicable pretreatment standards and requirements. The Permittee
shall maintain a current Allocation Table (AT) which summarizes the results of the HWA and the limits from
all IUPs. Permitted IUP loadings for each parameter cannot exceed the treatment capacity of the POTW as
determined by the HWA. [15A NCAC 2H.0909, .0916, and .0917; 40 CFR 403.5, 403.8 (f) (1) (iii); NCGS 143-
215.67 (a)]
6. Authorization to Construct (AtC)
The Permittee shall ensure that an Authorization to Construct permit (AtC) is issued to all applicable industrial
users for the construction or Modification of any pretreatment facility. Prior to the issuance of an AtC, the
proposed pretreatment facility and treatment process must be evaluated for its capacity to comply with all
Industrial User Pretreatment Permit (IUP) limitations. [15A NCAC 2H.0906 (b) (6) and .0905; NCGS 143-
215.1 (a) (8)]
7. POTW Inspection & Monitoring of their IUs
The Permittee shall conduct inspection, surveillance, and monitoring activities as described in its Division
approved pretreatment program in order to determine, independent of information supplied by industrial users,
compliance with applicable pretreatment standards. [15A NCAC 2H .0908(d); 40 CFR 403.8(f)(2)(v)].• The
Permittee must
a. Inspect all Significant Industrial Users (SIUs) at least once per calendar year; and
b. Sample all Significant Industrial Users (SIUs) at least twice per calendar year for all permit -limited
pollutants, once during the period from January 1 through June 30 and once during the period from
July 1 through December 31, except for organic compounds which shall be sampled at least once per
calendar year, For the purposes of this paragraph, "organic compounds" means the types of
compounds listed in 40 CFR 136.3(a), Tables IC, ID, and IF, as amended.
8. IU Self Monitoring and Reporting
The Permittee shall require all industrial users to comply with the applicable monitoring and reporting
requirements outlined in the Division -approved pretreatment program, the industry's pretreatment permit, or
in 15A NCAC 2H .0908. [15A NCAC 2H .0906(b)(4) and .0905; 40 CFR 403.8(f)(1)(v) and (2)(4; 40 CFR
122.440)(2)]
9. Enforcement Response Plan (ERP)
The Permittee shall enforce and obtain appropriate remedies for violations of all pretreatment standards
promulgated pursuant to section 307(b) and (c) of the Clean Water Act (40 CFR 405 et. seq), prohibitive
discharge standards as set forth in 40 CFR 403.5 and 15A NCAC 2H .0909, and specific local limitations. All
enforcement actions shall be consistent with the Enforcement Response Plan (ERP) approved by the Division.
[15A NCAC 2H .0906(b)(7) and .0905; 40 CFR 4038(0(5)]
10. Pretreatment Annual Reports (PAR)
The Permittee shall report to the Division in accordance with 15A NCAC 2H .0908. In lieu of submitting
annual reports, Modified Pretreatment Programs developed under 15A NCAC 2H .0904 (b) may be required to
submit a partial annual report or to meet with Division personnel periodically to discuss enforcement of
/41"`1 pretreatment requirements and other pretreatment implementation issues.
Version 7P2009

NPDES Permit Standard Conditions
Page 18 of 18
For all other active pretreatment programs, the Permittee shall submit two copies of a Pretreatment Annual
Report (PAR) describing its pretreatment activities over the previous twelve months to the Division at the
following address:
NC DENR / DWQ / Pretreatment, Emergency Response, and Collection Systems Unit (PERCS)
1617 Mail Service Center
Raleigh, NC 27699-1617
These reports shall be submitted according to a schedule established by the Director and shall contain the
following.
a.) Narrative
A brief discussion of reasons for, status of, and actions taken for all Industrial Users (IUs) in Significant
Non -Compliance (SNC);
- b) Pretreatment Program Summary (PPS)
A pretreatment program summary (PPS) on specific forms approved by the Division;
c.) Significant Non -Compliance Report (SNCR)
The nature of the violations and the actions taken or proposed to correct the violations on specific forms
approved by the Division;
d) Industrial Data Summary Forms (IDSF)
Monitoring data from samples collected by both the POTW and the Significant Industrial User (SIU)
and any monitoring data for other Industrial Users (lUs) in SNC. These analytical results must be
reported on Industrial Data Summary Forms (IDSF) or other specific format approved by the Division;
e.) Other Information
Copies of the POTW's allocation table, new or modified enforcement compliance schedules,. public
notice of IUs in SNC, and any other information, upon request, which in the opinion of the Director is
needed to determine compliance with the pretreatment implementation requirements of this permit;
11. Public Notice
The Permittee shall publish annually a list of Industrial Users (Ms) that were in Significant Non -Compliance
(SNC) as defined in the Permittee's Division -approved Sewer Use Ordinance with applicable pretreatment
requirements and standards during the previous twelve month period. This list shall be published within four
months of the applicable twelve-month period. [15A NCAC 2H .0903(b)(35)..0908(b)(5) and .0905 and 40
CFR 403.8(f)(2)(vii)J
12. Record Keeping
The Permittee shall retain for a minimum of three years records of monitoring activities and results, along with
support information including general records, water quality records, and records of industrial impact on the
POTW. [15A NCAC 2H .0908(f); 40 CFR 403.12(o)]
13. Funding and Financial Report
The Permittee shall maintain adequate funding and staffing levels to accomplish the objectives of its approved
pretreatment program. [15A NCAC 2H .0906(a) and .0905; 40 CFR 403.8(0(3), 403.9(b)(3)]
14. Modification to Pretreatment Programs
Modifications to the approved pretreatment program including but not limited to local limits modifications,
POTW monitoring of their Significant Industrial Users (SIUs), and Monitoring Plan modifications, shall be
considered a permit modification and shall be governed by 15 NCAC 2H .0114 and 15A NCAC 2H .0907.
Version 7/2009

DESIGN CALCULATIONS
for
OAKBORO WASTEWATER TREATMENT PLANT NPDES PERMIT
MODIFICATION
TOWN OF OAKBORO, NORTH CAROLINA
m
so
C stal L.
2938-C
APRIL 2013
1 %\ k CARP%'
:1*
��` p��SsIo ' \
QCSEAL
038694
$4,01
lB ficW--Zo13
'ton, P.E.
THE WOOTEN COMPANY
k ��INC lklt: �i ;' LA4kIHG A lI':II I}, I: 11AI
120kAliwankemo, fialclgY NC :"i0.. 'i_:1
915.8 fitYil iar 914.F34 35Y,9
B.L.F-0115

(*wt.\ CALCULATIONS FOR AVERAGE DAILY FLOW AT FULL DESIGN CAPACITY (1.2 MGD)
Aeration Tank
Design Considerations:
Average Daily Flow
BOD5 Influent
Effluent
TSS
NH3-N
Influent
Effluent
Influent
Effluent
Existing Facilities:
Number of Aeration Tanks
Unit Volume, cu. ft.
Unit Volume, gallons
Hydraulic Retention Time
BOD5 to Aeration Tank
Organic Loading
MLSS Concentration
MLVSS Concentration
1.2 MGD
300 '"g—'
mg L
5 L
250 Lg
30 mg
L
36Lg
4 mg
L
2
67,120 cf
502,000 ,gal
2 (502,000 gal)
(24 h)
1.2x(10)6 id
20 hrs
(Influent BOD) (Q) (8.34_1bL )
mg -MG
(300 Lg) (1.2 aG) (8.34 mg -MG)
3,002lb BO
day
BOD Loading
Volume,1,000 CF
(3,002 !b BOD)
d
2 (67.12)1,000 CF
22 lb BOD/1,000 CF/day
= 3,700 Lg
= (.8) (MLSS)
Town of Oakboro
Supporting Design Calculations
1
April 2013
2938-C

Total MLVSS in Aeration Basin
FM Ratio
Net Sludge Yield
MCRT
Number of Floating Aerators
Aerator Horsepower
Total Aeration Horsepower
Aerator Oxygen Transfer Rate
Total Aeration Capacity
= (.8) (3,7oo!')
= 2,960 Lg
= (2,960 7)(2) (0.502 MG) (8.34 Mlc mg)
= 24,785 lb MLVSS
BOD Loading
Total MLVSS
3,002 Ib BOD/d
24,785 lb MLVSS
0.113 lb BOD/lb MLVSS/d
D'7 lb BODs Removed
15 to 20 Days
3 per basin, 6 Total
15 hp each
90 hp
3 lb 02/hp/hr (Floating Aerator)
(hphr)(90hp)
(2dr)
6,480 lb:2
d
lbs solids
Total Aeration Capacity, hp/1,000 CF = 9
0 hp
2 (67.12)1,000 CF
hp
= 0.67
i,000 cf
Required Aeration Tank Volume:
VMG
Where:
BODR
(BODR)(YN)(SRT)
(MLSS) (8.34)
BOD5 Removal
(Influent BOD — Effluent BOD)(Q)(8.34)
(300 — 5 7) (1.2 MGD)(8.34)
2,952 lb BOD
Town of Oakboro
Supporting Design Calculations
2
April 2013
2938-C

YN
SRT
MLSS
VMG
VMG
Net Sludge Yield
lb solid
0.7 lb BOD Removed
Design Sludge Retention Time
= 15 days
= Design Mixed Liquor Suspended Solids
3,700 ig
(2,952ib BdOD)(0.7lb solid lb BOD RemovedIk15 days)
(3,700 j)(8.3 MG4 )
1.004 MG
= 1,004,000 gal
The available volume in the existing aeration tank is 1.004 MG. This indicates that the
existing aeration tank volumetric capacity is adequate for providing the desired wastewater
treatment.
Required Aeration Facilities:
Oxygen Requirement:
Ib 02
BOD5 Removal Rate = 1.5
Ib BODR
BOD Oxygen Requirement = (2,952 lbBODR) (1•5 tblb 02 )
4,428 d y
NH3-N Removal Rate = 4.6 Ib 02
Ib NH3 —N
NH3-N Oxygen Requirement = (36 - 4 ig) (1.2 MGD) (8.34 MGmg) (4.6 lb NH3 NJ
= 1,473 d y
Total Oxygen Required = 4,428 Ib °2 + 1,473 Ib 02
day day
= (s9o1!. bd 2)(2 hr)
= 245.88 lb
o2
hr
Required Horsepower for Mechanical Surface Aerator:
Town of Oakboro 3 April 2013
Supporting Design Calculations 2938-C

SOR
Where:
= AOR[
cs
(9 csw—Co)x 9T-20 x a
AOR = Oxygen Transfer Rate, lb O2/hr
= 220.92 ibh 02
CS = Oxygen saturation value of clean water at standard conditions
= 9.17In—lag
R
csw
= Ratio of oxygen saturation value of waste to that of clean water
= 0.9
= Saturation value of clean water (25°C, actual barometric Pa=14.67)
= 8.263 L9
C. = Residual concentration of dissolved oxygen desired during normal
operation
= 2.0 Ls
a = Ratio of oxygen transfer in waste to that of clean water at same
temperature
= 0.85
T = Design wastewater temperature
= 25° C
0 = Temperature correction constant
= 1.024
SOR = (245.88) 9.17
[(o.9C8.263_21.o2425_2oo.85])
SOR = 417.97 1b 02
h
Town of Oakboro 4 April 2013
Supporting Design Calculations 2938-C

Considering a 3.0 lb 02/hp/hr standard oxygen transfer rate for the existing floating
surface aerator, the required horsepower is:
Oxygen Transfer Rate
147.97 lb 02
h
3.0 lb 02/hp/hr
= 139.3 hp
The existing aeration facility (six (6) floating surface aerators, 15 hp each) provides total
aeration horsepower of 90 hp. This indicates that additional aeration facilities will be
required for providing adequate treatment of wastewater.
Mixing Requirement:
Considering a mixing power requirement of 100 Mc and the aeration tank total volume of
1.004 MG, the total mixing aeration capacity required is:
= 1.004 MG (100 Mc)
100.4 hp
From the above aeration requirements for meeting oxygen need and mixing need, it is
evident that the aeration requirement will be OXYGEN limited. Accordingly, it is
recommended to either provide an additional 50 hp aeration capacity or replace the six
existing 15 hp aerators with 25 hp aerators.
Clarifier
Design Considerations:
Average Daily Flow = 1.2 MGD
Surface Overflow Rate = 400 g f
Solids Loading Rate = 20- 30 lb solids/SF/day
Existing Facilities:
Number of Units = 3
Clarifiers 1 & 2:
Unit Diameter = 28 ft
Sidewater Depth = 12.67 ft
Unit Volume = 7,800 cf OR 58,344 gal
Surface Area = 615.8 s f
Weir Length — Inside = 34.56 ft
Weir Length — Outside = 40.84 ft
Clarifier 3:
Town of Oakboro 5 April 2013
Supporting Design Calculations 2938-C

Unit Diameter = 50 ft
Sidewater Depth = 14 ft
Unit Volume = 27,490 cf OR 205,625 gal
Surface Area = 1,963.5 s f
Weir Length — Inside = 59.69 ft
Weir Length — Outside = 69.12 ft
Flow to Each Clarifier:
Weirs 1 & 2 to Clarifiers 1 & 2
Length = 1 ft
Elevation = 347.20 ft
Water Level = 347.44 ft
Weir 3 to Clarifier 3
Length = 2.8125 ft
Elevation = 347.20 ft
Water Level = 347.44 ft
Flow Over Rectangular Weir with End Contractions:
Q = CW (L — 0.2H) (H) 1.5
Where:
CW = 2.125
Flow Over Weirs 1 and 2
Q
Q
Flow Over Weir 3
Q
Q
Total Flow Over Weirs
(2.125)(1 — (0.2)(347.44 — 347.20))(347.44 — 347.20)1.5
0.249 MGD
(2.125)(2.125 — (0.2)(347.44 — 347.20))(347.44 — 347.20)13
0.701 MGD
= 2 (0.249 MGD) + 0.701 MGD
= 1.199 MGD
Total flow over weir should be 2.4 MGD because it is the combined flow of the Influent, Q,
and the recycle, QR. Q = QR
Q+QR=2Q
Determine required driving head over weir to achieve 2.4 MGD.
Q = (2.125)(L - 0.2H)(H)1.5
(2)(0.701) _ (2.125)(2.8125 — 0.2H)(H)15
H = 0.388ft
Town of Oakboro 6 April 2013
Supporting Design Calculations 2938-C

Water Elevation @ H = 0.388 ft =
Top of Weir Contraction
347.20 ft + 0.388 ft
= 347.588 ft
= 347.79 ft
Flow Over Weirs 1 and 2 @ H= 0.388 ft
Q = (2.125)(1 - 0.2(0.388))(0.388)1.5
Q = 0.509 MGD
Total Flows Over Weirs:
Q = 2(0.509) + 1.402
Q = 2.42 MGD
Surface Overflow Rate:
(Recycle flow is not included because it does not contribute to upward flow velocity)
Clarifiers 1 and 2
Clarifier 3
Solids Loading Rate:
Clarifiers 1 and 2
Clarifier 3
Both the surface overflow rate and the
Weir Overflow Rate:
Total Length of Weirs
254,500 gpd
615.8 sf
413.28 gpd
701,000 gpd
1,963.5 sf
357.01 sPd
sf
b L
(3,700 Lg)(8.3 MG mg
)(0.509 MGD)
615.8 sf
25.5 lb solids/s f /d
(3,700 L)(8.3 M4 mg)(1.402 MGD)
1,963.5 sf
22.03 lb solids/sf /d
solids loading rate are within the acceptable ranges.
= 279.61ft
Town of Oakboro
Supporting Design Calculations
7
April 2013
2938-C

Average Daily Flow
Weir Overflow Rate
Chlorine Disinfection System
Chlorine Contact Chamber:
Required Contact Time
Flow
Volume Required
Volume Available
Channel Dimensions
Volume
= 1.2 MGD
= 1,200,000 gpd
279.61 ft
= 4,291.69 gpd
LF of Weir
= 30 minutes
= 1.2 MGD
(1'200,000gal\
(30 min) \60 min/ \2 hr/
25,000 gal
72.3 ft long x 3 ft wide x 5 feet deep
= [(72.3 f t) (3 f t) (5 f t)] x 4
= 4,338 cf (7.489a1)
= 32,448 gal
Chlorine contact chamber is of sufficient volume
Chlorine Feed System:
Number of Chlorinators
Chlorinator Capacity, each
Peak Daily Flow
Chlorine Dose
Amount of Chlorine Required
= 2
= 100 1b C12
d
= 3 MGD
67
_ (6i) (8.34 MC mg) (3.0 dG)
1b C12
= 150.12
d
Town of Oakboro
Supporting Design Calculations
8
April 2013
2938-C

Aerobic Sludge Digestion
Design Considerations:
Average Daily Flow
BOD5 Influent
Effluent
Waste Activated Sludge
Percent Solids in Combined Waste Sludge
Specific Gravity of Waste Sludge
Waste Sludge Production
Waste Sludge Volume
Design Considerations:
Waste Activated Sludge
= 1.2 MGD
300 Lg
= 5 mg
L
= 0.7
= 1
= 1.02
= (300 — 5 g) (8.34 lb L g lb ) (1.2 MGD) (0.7 lb solidBODR )
L MG m
= 2,101.68
day
lb solid
2,102 lb solid
day
2,1020 solid
d
(8.34)(1.02)(0.01)
= 24,709.6 gd i
Waste Sludge Concentration
Percent Volatile Solids in Waste Activated Sludge, %
Percent Volatile Solids Reduction, %
Temperature, °C
Sludge Retention Time @ 15°C
Expected Thickened Solids Concentration
Average Operating MLSS Conc.
Supernatant TSS Concentration
Required Aerobic Digestion Tank Volume:
lb
= 2,102 da-
y
10,000 Lg
= 80
= 40
= 25°C
= 60 Days
= 30,000 Lg
= 25,000 Lg
= 300 Lg
Town of Oakboro 9 April 2013
Supporting Design Calculations 2938-C

Sludge Retention Time
Total Solids in Aerobic Digester,lbs
Solids Loss/Day in Supernatant + Solids Wasted/Day
Average MLSS Conc.in Digester*8.34*Digester Volume
[(Supernatant TSS Conc.)(I— f)+(Waste Sludge Conc.(f ))xln f.Flow]
Where f is the fraction of influent solids retained in the digester and (1-0 is the fraction that
leaves as supernatant.
f
(Influent SS Conc.)(Fraction of Solids Not Destroyed)
Thickened Solids Conc.
Fraction of solids not Destroyed =
f
Aerobic Digester Volume:
60 Days
60 Days
60 Days
60 Days
Digester Volume
Digester Volume
2,102 d-(2,102 d)(0.8)(0.4)
2,102 d
0.68
10,000mg/L(0.68)
30,000 mg/L
= 0.227
Average MLSS Conc.in Digester,mg/L*8.34*Digester,Vol,MG
[(Supernatant TSS Conc.)(I—f)+(Waste Sludge Conc.(f))*Inf.Flow
(25,000 Ls)(8.34 mi MG) (Digester Volume)
[(3oO)(1_O.227)+(3o.00O4)(O.227)]x(8.34xO.21 MGD)
_ 208,500x(Digester Volume)
[231.9 + 6,810](8.34)(0.021 MGD)
= 169.056 x (Digester Volume)
_ 60 days
169.056 d y
0.355 MG
355,000 gal
Existing Aerobic Digestion Tank Volume:
One Rectangular Tank
Tank Volume
Tank Volume
Two Rectangular Tanks
Tank Volume
Tank Volume
52 ft x 75 ft x 12 ft
(52 f t) (75 f t) (12 ft)
46,800 cf
350,064 gal
15ft x 15ft x 6.25ft
= 2 x [(15 f t) (15 f t) (6.25 ft)]
= 2,812.5 c f
= 21,037.5 gal
Town of Oakboro
Supporting Design Calculations
10
Apri12013
2938-C

Sludge Storage for Sludge Management by Land Application:
Total Waste Sludge Quantity to Aerobic Digester
Percent Volatile Solids in Waste Sludge, %
Percent Volatile Solids Reduction, %
Expected Thickened Solids Concentration
Specific Gravity of Thickened Sludge
Sludge Storage Requirement (State Reg.)
Stabilized Sludge Quantity
= 2,102 d
80%
= 40%
= 30,000 Le
= 1.03
30 days
(2,102 d)(0.8)(0.6)+(2,102 d)(0.2)
(8.34)(1.03)(0.03)
= 5,546.48 gdi
Required Sludge Storage Volume = (5,546.48 d y) (30 days)
= 166,394 gal
Total Required Aerobic Sludge Stabilization Storage Volume:
Additional Volume Required = (355,000 gal + 166,394 gal) — 350,064 gal — 21,037 gal
= 150,292 ,gal
Aeration And Mixing Requirement In Aerobic Digester
Existing Facilities:
Digester Volume
Mixers
Aerators
For a digester @ 3% solids:
• Aerators use 200 hp/MG of Volume
• Mixers use 60 hp/MG of Volume
Aeration Requirement
350,000 ,gal
1@15hp
2 @ 20 hp
(2,012 lb solid VSS l ( lb VSSR'\ LB Oz
day 1(0•8 solids) `0'4 lb vss) 2 lb VSSR
1,345.28 lb02
56.05 lb o2
hr
Town of Oakboro
Supporting Design Calculations
11
Apri12013
2938-C

f SOR
SOR
_ (47.63) [0.9x8.263-2.00..o24)25-209.171 (0.85)
02 Transfer Rate - Floating Aerator =
Power Requirement
Mixing Requirement:
Aerator Mixing
Mixer Mixing
Total Volume Mixed
Volume Requiring Mixing
83.94 l h02
3.0 lb 02/hp/hr
83.94lb 02
3.0 lb 02/hp/hr
27.98 hp
2 (20 hp) (2P)
MG
0.2 MG Adequately Mixed
= 1(15 hp) (60 hp MG
)
= 0.25 MG Adequately Mixed
0.45 MG
= 0.35 MG
Sludge Recirculation / Waste Pump Station
Design Considerations:
Average Daily Flow = 1.2 MGD
Sludge Recycle Ratio = 100 %
Existing Facilities:
Number of Pumps = 2
Pump Capacity = 500 gpm
Required Sludge Recirculation Facilities:
Considering providing 100% sludge recirculation flow capacity. The required capacity of the
sludge recirculation pump is:
Required Pump Capacity = (1,200,000 ( d
J 1,440 min))
833 gpm
Town of Oakboro 12 April 2013
Supporting Design Calculations 2938-C

N
CALCULATIONS FOR PEAK FLOW CONDITIONS
Aeration Tank
Design Considerations:
Peak Flow
Walkway Elevation
Normal Pool Elevation
Outlet Pipe Invert
Bottom of Basin Elevation
Driving Head
Velocity in Outlet Pipe
Area
Where:
e
r
Area
Flow in Pipe
Splitter Box
% of ADF to Weir 1
% of ADF to Weir 2
= 2.5 x (ADF)
= 2.5 x (1.2 MGD)
= 3 MGD
= 4.64 c f s
= 350.00 ft
= 348.00 ft
= 347.25 ft
= 336.50 ft
= 348.00 ft — 347.25 f t
= 0.75 ft
= 2:Fit
_ J(2) (32.2 SZ) (0.75 ft)
= 6.95 ft
s
7tr 2
2.09
= 0.5ft
= 7r(0.5 ft)2 — (0.5 ft)2(2.09—sin2.09)
2
2 r2(0—sin 9)
0.63 sf
6.95 Stx0.63sf
4.34cfs
= 20.75%
= 20.75%
Town of Oakboro
Supporting Design Calculations
13
April 2013
2938-C

% of ADF to Weir 3
Peak Flow
Recycle Flow
Portion of Flow to Weir 1
Portion of Flow to Weir 2
Portion of Flow to Weir 3
Driving Head Over Weirs 1&2:
0.8715
H
Weir Elevation
Water Elevation
Top of Weir Plate
Resulting Flow over Weir 3:
Q
Total Flow Over Weirs
Clarifier
Surface Overflow Rate:
Clarifiers 1 & 2
Clarifier 3
58.50%
3.0 MGD
1.2 MGD
(0.2075) (4.2 MGD)
0.8715 MGD
(0.2075) (4.2 MGD)
0.8715 MGD
(0.585)(4.2 MGD)
2.457 MGD
(2.125)(1 — 0.2H)(H)1.5
0.60 ft
347.20 ft
347.20 + 0.60
347.80 ft
347.81 f t
(2.125) (2.8125 — 0.2 x 0.6) (0.6)1.5
2.76 MGD
2(0.8715 MGD) + 2.76 MGD
4.395 MGD
622,500 gpd
615.8 sf
= 1,010.88 9s f
1,755,000 gpd
1,963.5 sf
= 906.26 SPd
f
Per Metcalf & Eddy, Table 8-7, acceptable overflow rates at peak flow range from 1,000-1,600
GPD/SF.
ell. Solids Loading Rate
Town of Oakboro
Supporting Design Calculations
14
April 2013
2938-C

Clarifiers 1 & 2
Clarifier 3
(3,700 �g )(8.34 MG_,mg)(0.8175 MGD)
615.8 sf
= 40.97 lb/sf /d
= 1.71 lb/s f /hr
(3,700 Lg)(8.34 MG-mg)(2.76 MGD)
1,963.5 sf
= 43.381b/sf/d
= 1.80 lb/s f /hr
Per Metcalf & Eddy, Table 8-7, acceptable solids loading at peak flow is approximately 1.6
lb/sf/hr.
Chlorine Contact Chamber
Volume
Contact Time at Peak Flow
32,448 gal
32,448 gal � /24hr1 /60�r min)
3x(10) d l 1l J
15.5 min
Town of Oakboro 15 April 2013
Supporting Design Calculations 2938-C

Berry, Ron
From: Berry, Ron
Sent: Friday, October 24, 2014 1:01 PM
To: Berry, Ron
Subject: FW: NPDES Permit NC0043532 West Stanly WWTP Renewal and Modification
Application
Attachments: WW Treatment Fac 31.pdf; WWTP Outfall PS&FM_14.pdf; WWTP Exp_26.pdf; WWTP
Exp_10.pdf; WWTP Exp_11.pdf; Outlet 001a Reduced jpg; Outlet 001b Reduced jpg;
Outlet 002a Reduced jpg; Outlet 002b Reduced jpg
From: Donna Davis[mailto:ddavisCa�stanlycountync.gov]
Sent: Friday, October 24, 2014 11:50 AM
To: Berry, Ron
Cc: Granseur Dick
Subject: Fwd: NPDES Permit NC0043532 West Stanly WWTP Renewal and Modification Application
Mr. Berry,
Please see below the responses to your questions regarding the West Stanly WWTP. The first three items listed,
you should have already provided but I am including them once again. Items 4 - 7 and attachments were
prepared by Mr. Granseur Dick, PE of Chambers Engineering, PA.
Please let me know if you need additional information. Thank you for your assistance and patience in this matter.
Donna Davis
Stanly County Utilities
1000 N 1st Street
Suite 12
Albemarle, NC 28001
[phone]
1) Are you the corrected contact for this permit?

Yes
2) Is Stanly County requesting a NPDES modification for an expansion to 1.2 MGD?
Yes, we would like to include the 1.2 mgd tier modification originally requested by the Town of
Oakboro.
3) Is The Wooten Company Stanly County representative?
Stanly County's engineering representative is
Chambers Engineering, PA
129 N 1st Street
Albemarle, NC 28002
[phone]
4) Is Outfall 002 discharging via a submerged diffuser? If yes need a simple schematic of the diffuser system.
Outfall 002 discharges above normal Rocky River water levels through a 12" DIP with a diffuser check
valve. Ref. "WWTP Outfall PS&FM 14. pdf" for plan and profile views and photos "Outlet 002a Reduced" and
"Outlet 002b Reduced".
5) What is the configuration of emergency Outfall 001? Open pipe, submerged, etc.?
Outfall 001 discharges above normal Long Creek water levels through an open 18" RCP with a concrete head
wall with baffles. Ref. "WW Treatment Fac 31. pdf" for plan and profile views and photos "Outlet 001a Reduced"
and "Outlet 001b Reduced".
6) 1 need a flow schematic or plot plan for the influent flow station and screen/grit system.
Ref. drawings "WWTP Exp 10. pdf" and "WWTP Exp 11. pdf" for plan and profile drawings of the Inflent Pump
Station - Step Screen System and the Grit Removal System.
7) Where are the composite samplers, influent and effluent located?
Influent Samplers are located at the McCoys Creek Pump Station upstream of the bar screen. (Ref. WWTP
Exp 10. pdt)
Effluent Samplers are located 1' upstream of the outlet weir for the chlorination chamber. (Ref. WWTP
Exp 26.pdf)
2

OUTFALL 002: West Sta n ly WWTP NC0043532

OUTFALL 001: West Stanly WWTP NC0043532

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10
CIVIL NOTES
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275
270
265
260
255
250
280
275
270
265
260
255
106+00
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107
00
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NC 138
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_1
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WOODS
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123+00
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112+00
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114+00
115+00
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sou: r-2s'
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MECHANICAL JOINT &
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CONTRACTOR TO REPLACE
GUARDRAIL AS PER
NCDOT SPECIFICATIONS
EASING GROUND ELEVATION
119+00
P-K NAIL FOUND AT
WEST END OF BRIDGE
OVER LONG CREEK
IN C/L NC 138
EXIST.
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280
275
270
265
260
255
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34

CIVIL BILL OF MATERIAL
ITEM
DESCRIFMN
HOXIALUC PORKER SIFPLY (SEE la0.(CI SRECf001OIO
2
Kamm vas
J
J• Pvc TAJAM FOII NNRNILC LNG
4
Slip SICRELN CIO R41ISSCE P1161E0 SPEOI(AION
SIiP SQ(EN am R M QYIILRGE P1PC
6
SILT SCREEN (SEE PROJECT SPEC:IX/i0R1
7
R69TJR1 FOR wOLIK P9E
MCLE FDR STEP SCREEN ERR Sh4 SR.. Moir IISRG I/7' FAR. 1EI.x 6" i !/6' 2 6' LC
SE ODAL C. INNS 9EE1 ARE.
FROPO$(0 SIOF MIT
10
1/f' PC MMIERR M/6101NOY PROC111ON GENCL now
conic 7' VAIER LOC ON SRE
11
12
2/0 S.OL VALVE
MUTE NCO 1(A 'RICE 3/4' PMC IIAIER
CIVIL NOTES
1 NL YdMRC I1IPMIRE 10 11 SUCCESS STEEE.
• FCc RSOiwoN u+ h( PERMED Nat REBORN_ SYSICK
SEE OM II
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SEE ORG II
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6. PER OMR OH. MORIO101. SEE DSO. 7
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* Pi10 wen MAIM 17•21 TO 44BNCA1ON OF manes.
CRT ITT SKIER N R16
Ma IS N01 910 111
SUPPORT ANGLE FOR RAM PRESS
® SECTION B
Sb4E- I/2 - 1'-0'
s
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STALL 1n' -
10• x 273' CN G RID
re
1
Fes__ C4 rR d
0
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APPROXIMATE LOCATION OF
INFLUENT SAMPLER LOCATED
UPSTREAM OF BAR SCREEN
MECHANISM
e SECTION A
S10IL• her .
RECORD DRAWING
1..4VaClwnr6.4KIN opO 47upialxoRMlv.li.Yaa .141 WODI:R1. rr�1
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ES ENGINEERING SERVICES, P.A.
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CUM. N.C.
'L"' 11ASTCIIATCR 7111AYYglf MANE EXPANSION
TONN OF DAXOORO. NORTH CAROUNA
EMUS['. INFLUENT PUMP STA., CIVIL
STEP SCREEN SYSTEM
a f-o1-i +w uIo I 115102 110 OF 51

CIVIL BILL OF MATERIAL
ITEM
DES-COMM
2
4
R
0
ru W1IERRL. suss
a i o 011 Ir awn,(401 1144Y6•UCH FACE. SLOPE 1
10 CONCRETE
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PRs. 6' SW 1/rAS1 NON RIOS
10
11
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CIVIL NOTES
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RECORD DRAWING
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Es ENGINEERING SERVICES, P.A.
CONSULTING ENGINEERS
CANILR. N.C.
••••• WASTEWATER TREATMENT PU11TT EE1'ANSTON
'•=• TOWN OF 04600R0, NORTH CAROUNA
—EXIST. INFLUENT PUMP STA. CIVIL
AERATED GRIT REMOVAL SYSTEM
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Stanly County Utilities
1000 N 1:t Street Suite 12
ALBEMARLE, NORTH CAROLINA 28001
Phone [phone] Fax [phone]
October 21, 2014
Mr. Ron Berry
NCDENR — Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Mr. Berry,
The County of Stanly is providing as required the NPDES application signature page for the
West Stanly WWTP (formerly Oakboro WWTP) NC0043532. Stanly County has purchased the
treatment facility and assumes responsibility for the associated permit renewal and permit
modification submitted by the Town of Oakboro.
Thank you for your time and efforts on our behalf. If you have any additional questions or
concerns regarding this matter please feel free to contact me.
Sincerely,
Donna Davis, Director
Attachments: page 9 of EPA Form 23510-2A
RECEIVEDIDENRIDWR
OCT 2.4 2014
Water -Quality
Permitting Sewn

t
FACILITY NAME AND PERMIT NUMBER:
W
West Stanly WTP (formerly Oakboro WWTP) NC0043532
Form Approved 1/14/99
OMB Number 2Q40-0088
ASIC`I PP --'— .' ;I.ON'INFORMA TION, .:._ . , .... ._..
....
PART C. CERTIFICATION .. ,, % , ,
Allrapplicants must -co Iete the CertificatlgniSec o �Re r to i structionsto cafe 1 a-
s z �- :-�:��.z:-..._ �,-..,��.,,y� - t!--,�,. ��_.�.t7rtrr�e �p;is`8R,t1ffiC@fifOf'�e_p1�11'pOS@S of tlmis oertficdtlon Aq l
�- appilcantci, iii ~ com fete all ap" likable sections of Fo.}2A, "as °e � lai' eii• Iti'th A' ' (ica o Overvi w ;' Rd'cate, be ow " ' `' pJ Fo � - .� ti � - • � e ,-� � � �- ,.�-� .. r ��.�g . t :... :.��..��! l: ��--� `i���---I���-��•.>�� p��'. o Fo�'rr�t2A,you
• ha4e ft -s n n� s
corlr�ile�ec�artda�esubmi mg, By ig, Jj.gJthiscce, ca�o�i tafen,�erttt,a p�Icants,�antirrn.that'theyxhayere ewed:Fo� a d ave-co ``"lefed'
'ati'sections'th'at'spply.:tothe facil forwhichsthis:a' f '' , '' . ` ' z ,''"
fiY pPlicar on is`stibmitfed.,..�•., , , .w:.:.., ...._ �::; A�, .,_ - � ,, ,:: yk :. ,- ;.'.; �t:.•...•.. A..
Indicate which parts of Form 2A you have completed and are submitting:
Basic Application Information packet Supplemental Application Information
.•. ......•...,
packet
Effluent Testing Data)
Biomonitoring Data)
Discharges and RCRA/CERCLA Wastes)
Sewer Systems)
Part D (Expanded
Part E (Toxicity Testing:
•
Part F (Industrial User
Part G (Combined
ALL APPLICANTS MUST COMPLETE THE FOLLOWING CERTIFICATION.
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel property gather and evaluate the information submitted. Based on my inquiry of the person or persons
who manage the system or those persons directly responsible for gathering the information, the information is, to the best of my knowledge and
belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine
and imprisonment for knowing violations.
Name and official title Donna L Davis
Signature ,I.. 0(0afie.(L)
Telephone number [phone]
Date signed 10/21/2014
Upon request of the permitting authority, you must submit any other information necessary to assess wastewater treatment practices at the treatment
works or identify appropriate permitting requirements.
SEND COMPLETED FORMS TO:
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 9 of 21

ArA
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Donna L. Davis
Utilities Director
Stanly County
1000 North First Street, Suite 10
Albemarle, NC 28001
Dear Ms. Davis:
John E. Skvarla, III
Secretary
September 26, 2014
Subject: Validation of NPDES Permit Applications
Permit NC0043532
West Stanly WWTP (formerly Oakboro WWTP)
Prior to the March 2014 transfer of ownership by the Division of Water Resources of the
former NPDES Oakboro WWTP permit NC0043532 to Stanly County, the then owner Town
of Oakboro submitted applications in July 2013 for:
1) NPDES permit modification to expand to 1.2 MGD which included a flow justification,
Engineering Alternative Analyses (EAA), and supports calculations to re -rate the
existing treatment works based on a Division's 2005 speculative limit letter. The
application and support documents were prepared for the Town of Oakboro by their
representative The Wooten Company.
2) NPDES permit renewal for current permitted 0.9 MGD conditions and a request to
include the 1.2 MGD expansion. The application was prepared for the Town of
Oakboro by their representative The Wooten Company.
It is our understanding Stanly County wishes to proceed with the NC0043532 permit
renewal and the NC0043532 permit modification for expanding to1.2 MGD. The
documentation regarding the permit renewal and expansion was submitted by the previous
owner, the Town of Oakboro under the signature of Mayor Danny Long. Therefore, the
Division is requiring Stanly County to provide new signature pages (page 9 of EPA Form
23510-2A) on both applications under their representative signature.
Upon submittal of the new signature pages Stanly County is accepting the documentation
in the previously submitted applications, EAA, flow justification, and applying for the permit
renewal and the permit expansion modification for 1.2 MGD. This submittal also signifies
Stanly County, or their designated representative, as the responsible party to address any
issues or questions in regards to these applications.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] Internet: www.ncwaterquality.org
An Equal Opportunity'Affirmative Action Employer

Donna L. Davis, Utilities Director Stanly County
September 26, 2014
Page 2 of 2
Please be aware that any expansion above 0.9 MGD including the re -rate of the existing
equipment, changes associated with treatment upgrades, or equipment additions associated
with an expansion are subject to Division approval as part of the Authorization to Construct
permitting process. An Authorization to Construct permit application cannot be processed for
approval by the Division until the proposed expansion has an approved limitation page in the
NPDES permit. Additional details on applying for an Authorization to Construct permit is
available on http://portal.ncdenr.org/web/wq/swp/ps/npdes/atc.
If you have any questions you can contact Ron Berry by phone (919) 807 — 6396 or
email [e-mail].
Sincerely,
a, a,,,„
Ron Berry, Engineer
Division of Water Resources, NCDENR
Cc:
Mooresville Regional Office/Michael Parker
Central Files
NPDES File

Stanly County Utilities
1000 N 1" Street Suite 12
ALBEMARLE, NORTH CAROLINA 28001
Phone [phone] Fax [phone]
October 21, 2014
Mr. Ron Berry
NCDENR — Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Mr. Berry,
The County of Stanly is providing as required the NPDES application signature page for the
West Stanly WWTP (formerly Oakboro WWTP) NC0043532. Stanly County has purchased the
treatment facility and assumes responsibility for the associated permit renewal and permit
modification submitted by the Town of Oakboro.
Thank you for your time and efforts on our behalf. If you have any additional questions or
concerns regarding this matter please feel free to contact me.
Sincerely,
W,,OmAt
Donna Davis, Director
Attachments: page 9 of EPA Form 23510-2A
RECEIVEDIDENRIDWR
OCT 2 4 2014
Water Quality.
Permitting Section

FACILITY NAME AND PERMIT NUMBER:
W
West Stanly WTP (formerly Oakboro WWTP) NC0043532
Form Approved 1/14/99
OMB Number 2040-0086
BASIC APPLICATION INFORMATION
PART C. CERTIFICATION
All applicants must complete the Certification Section. Refer to instructions to determine who is an officer for the purposes of this certification. All
applicants must complete all applicable sections of Form 2A, as explained in the Application Overview. Indicate below which parts of Form 2A you
have completed and are submitting. By signing this certification statement, applicants confirm that they have reviewed Form 2A and have completed
all sections that apply to the facility for which this application is submitted.
Indicate which parts of Form 2A you have completed and are submitting:
Basic Application Information packet Supplemental Application Information
packet:
Effluent Testing Data)
Biomonitoring Data)
User Discharges and RCRAICERCLA Wastes)
Sewer Systems)
Part D (Expanded
Part E (Toxicity Testing:
Part F (Industrial
Part G (Combined
ALL APPLICANTS MUST COMPLETE THE FOLLOWING CERTIFICATION.
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons
who manage the system or those persons directly responsible for gathering the information, the information is, to the best of my knowledge and
belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine
and imprisonment for knowing violations.
Name and official title Donna L Davis
Signature XO Ct— TS , 0a-el 'QJ
Telephone number [phone]
Date signed 10/21/2014
Upon request of the permitting authority, you must submit any other information necessary to assess wastewater treatment practices at the treatment
works or identify appropriate permitting requirements.
SEND COMPLETED FORMS TO:
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 9 of 21

Berry, Ron
From: Donna Davis <[e-mail]>
Sent: Wednesday, September 03, 2014 11:01 AM
To: Berry, Ron
Cc: Stephen Chambers; Jim Amaral
Subject: Re: NPDES Permit NC0043532 West Stanly WWTP Renewal and Modification
Application
Mr. Berry,
Thank you for the time you took to clarify with me the status of the West Stanly WWTP permit. Please see my
responses below. The first three items listed, we talked about them on the phone but this email is for your
records.
1) Are you the corrected contact for this permit?
Yes
2) Is Stanly County requesting a NPDES modification for an expansion to 1.2 MGD?
Yes, we would like to include the 1.2 mgd tier modification originally requested by the Town of
Oakboro.
3) Is The Wooten Company Stanly County representative?
Stanly County's engineering representative is
Stephen Chambers, P.E.
Chambers Engineering, PA
129 N 1st Street
Albemarle, NC 28002
Y'�`'r
[phone]
The information requested for items 4 - 7 will be submitted by our engineer, Mr. Chambers.
4) Is Outfall 002 discharging via a submerged diffuser? If yes need a simple schematic of the diffuser system.
5) What is the configuration of emergency Outfall 001? Open pipe, submerged, etc.?
6) I need a flow schematic or plot plan for the influent flow station and screen/grit system.
1

7) Where are the composite samplers, influent and effluent located?
Thank you.
Donna Davis
Stanly County Utilities
1000 N 1st Street
Suite 12
Albemarle, NC 28001
[phone]
On Thu, Aug 28, 2014 at 11:00 AM, Berry, Ron <[e-mail]> wrote:
Donna L. Davis
Utilities Director
Stanly County
Albemarle, NC 28001
Ms. Davis:
Prior to the purchase of the Oakboro WWTP by Stanly County, the Town of Oakboro had submitted
applications for the NPDES permit renewal and for the NPDES permit modification to expand the facility to 1.2
MGD. The Wooten Company, representative for the Town of Oakboro, prepared and submitted the applications
as well as other documentation. To assist the Division with moving forward with this NPDES permit please
confirm:
1) Are you the corrected contact for this permit?
2) Is Stanly County requesting a NPDES modification for an expansion to 1.2 MGD?
3) Is The Wooten Company Stanly County representative?
4) Is Outfall 002 discharging via a submerged diffuser? If yes need a simple schematic of the diffuser
system.
5) What is the configuration of emergency Outfall 001? Open pipe, submerged, etc.?
6) I need a flow schematic or plot plan for the influent flow station and screen/grit system.
2

7) ,Where are the composite samplers, influent and effluent located?
If the expansion is requested and is approved by the Division, one final NPDES permit will be issued covering
both the renewal and the expansion. First, a draft NPDES permit will be developed and issued to you, other
agencies, and the public for 30 days to review and comment. Then the final NPDES permit will be issued
once all comments are addressed.
e-6,19(114-Fo
The Wooten Company provided general information on the proposed equipment,
rerate, and operation changes needed for the 1.2 MGD expansion. However, the only impact to the NPDES
permit once the Division concurs with the expansion request will be the addition of an 1.2 MGD effluent limit
page for future expansion. Upon receipt by the Division of the signed Authorization to Construct (ATC)
Engineer's Certificate indicating completion of the ATC permit items, the NPDES 1.2 MGD effluent limit page
will be activated. The ATC permit is a separate permitting process, has its own minimum design standards and
requirements, and must be obtained for the rerate design and for the construction/upgrade of additional
treatment components associated with the 1.2 MGD expansion. There is no fee associated with the ATC
application. You can submit the ATC application to the Division once the permit draft is issued but an ATC
permit cannot be issued until the final NPDES permit is issued. For more information on the ATC process and
its requirements visit:
http://portal.ncdenr.org/web/wq/swp/ps/npdes/atc
Ron Berry has been assigned this NPDES permit renewal and 1.2 MGD expansion modification, and will also
be handling the ATC process including issuing the ATC permit. If you have any questions you can contact Ron
Berry at (919) 807 — 6396 or [e-mail].
Sincerely,
Ron Berry, Engineer
Division of Water Resources/NCDENR
Phone: (919) 807 - 6396
Email: ron.berry@,ncdenr.gov
Location Address - Archdale Building, Office 925Y
3

512 N. Salibuiy St.
Raleigh, NC 27699
Mailing Address - Archdale Building, NCDENR/DWR
1617 Mail Service Center
Raleigh, NC 27669-1617
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.
Donna Davis
Stanly County Utilities
1000 N 1st Street
Suite 12
Albemarle, NC 28001
[phone]
Pursuant to North Carolina General Statutes, Chapter 132, email correspondence to and from this address may be
considered public record under North Carolina Public record Laws and may be disclosed to third parties.
4

THE
WOOTEN
COMPANY
ENGINEERING
PLANPIING
ARCHITECTURE
120 North Boylan Avenue
Raleigh NC 27603-1423
919.828.0531
fax [phone]
July 10, 2013
Ms. Jackie Nowell
Division of Water Quality
Surface Water Protection Section — NPDES
512 N. Salisbury Street
9th Floor — Archdale Building
Raleigh, NC 27604
Re: NPDES Permit Renewal and Modification — NC0043532
Town of Oakboro, North Carolina
Dear Ms. Nowell:
On behalf of the Town of Oakboro please find attached the permit renewal for the
Oakboro Wastewater Treatment Plant's NPDES permit number NC0043532. The
Oakboro Wastewater Treatment Plant is currently permitted for operation at 0.90
MGD but was originally designed for operation at 1.20 MGD. The Oakboro WWTP,
having the potential capacity available, is well poised to act as a regional WWTP for
those municipalities in southwestern Stanly County. In addition to renewing its
existing permit the Town of Oakboro is requesting a permit modification to expand
its permitted capacity to 1.2 MGD. Attached you will find the following items for
the permit renewal and modification:
• Application for NPDES Permit Renewal — One original and two copies
• Permit modification fee - $260.00
• Application for NPDES Permit Modification — One original and two copies
I trust that these items are sufficient for your review at this time. Should you
require additional information please feel free to contact our office.
Sincerely,
The Wooten Company
cc: Larry Branch — Town of Oakboro (w/o enclosures)

TOWN OF OAKBORO
Date - Inv No.\Desc. P.O. No. Amt
03/26/2013 3/26/13/NPDES PERMIT APPLIC. 260.00
6152
Check - 6152 04/03/2013
Total Amt:
260.00
PAY
TO THE
ORDER
OF
TOWN OF OAKBORO
P.O. BOX 610 • OAKBORO, NC 28129-0610
Provision for the payment of this check has been made by an
appropriation duly made pursuant to the Local Government
Budget and Fiscal Control Act.
Two Hundred Sixty Dollars and 00 Cents
NCDENR-DIV. OF WATER QUALITY
1617 MAIL SERVICE CENTER
RALEIGH NC 27699-1617
HOME SAVINGS BANK (IP
66-7002-2531
DATE
04/03/2013
6152
AUTHORIZED SIGNATURE
6152
AMOUNT
$260.00
NCE OFFICER
000 6 L 5 211' 1: 2 5 3 L 700 201: 0000 11146670

gown Of Qakboro
109-A N. Main St. -- PO Box 610
Oakboro, NC 28129
704-485-3351/ 704-485-2439 (fax)
www.oakboro.com
June 28, 2013
NC DENR/DWQ/Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: Request for NPDES Permit Renewal
NPDES Permit # NC0043532
Oakboro WWTP
Stanly County
To whom it may concern,
The Town of Oakboro respectfully requests renewal of the Oakboro WWTP NPDES
Permit.
The Following is an update and/or comments since the last permit renewal:
1.) The town has had no industrial flow in the last ten (10) years and no longer
participates in the NC Pretreatment Program. We are presently permitted at
0.9 MGD discharge.
2.) We continue to be an active member in the Yadkin/Pee Dee River Basin
Association (YPDRBA) in which they continue to monitor our receiving
streams (Long Creek and Rocky River)
3.) Oakboro was authorized to do only one (1) PPA in lieu of three (3) due to the
fact our permitted flow is <1.0 MGD and we do not have a pretreatment
program.
4.) Our present Mayor is Danny R. Long in lieu of Mrs. Joyce H. Little and
requests all future correspondence to be addressed to Mayor Long.
Sincerely,
James J. Amaral
Oakboro WWTP ORC
Phone: [phone]
Email: [e-mail]
)

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
FORM
2A
NPDES
NPDES FORM 2A APPLICATION OVERVIEW
APPLICATION OVERVIEW
Form 2A has been developed in a modular format and consists of a "Basic Application Information" packet
and a "Supplemental Application Information" packet. The Basic Application Information packet is divided
into two parts. All applicants must complete Parts A and C. Applicants with a design flow greater than or
equal to 0.1 mgd must also complete Part B. Some applicants must also complete the Supplemental
Application Information packet. The following items explain which parts of Form 2A you must complete.
BASIC APPLICATION INFORMATION:
A. Basic Application Information for all Applicants. All applicants must complete questions A.1 through A.8. A treatment works
that discharges effluent to surface waters of the United States must also answer questions A.9 through A.12.
Additional Application Information for Applicants with a Design Flow z 0.1 mgd. All treatment works that have design flows
greater than or equal to 0.1 million gallons per day must complete questions 6.1 through B.6.
C Certification. All applicants must complete Part C (Certification).
SUPPLEMENTAL APPLICATION INFORMATION:
D Expanded Effluent Testing Data. A treatment works that discharges effluent to surface waters of the United States and meets
one or more of the following criteria must complete Part D (Expanded Effluent Testing Data):
1. Has a design flow rate greater than or equal to 1mgd,
2. Is required to have a pretreatment program (or has one in place), or
3. Is otherwise required by the permitting authority to provide the information.
E. Toxicity Testing Data. A treatment works that meets one or more of the following criteria must complete Part E (Toxicity Testing
Data):
1. Has a design flow rate greater than or equal to 1 mgd,
2. Is required to have a pretreatment program (or has one in place), or
3. Is otherwise required by the permitting authority to submit results of toxicity testing.
F. Industrial User Discharges and RCRAJCERCLA Wastes. A treatment works that accepts process wastewater from any
significant industrial users (SIUs) or receives RCRA or CERCLA wastes must complete Part F (Industrial User Discharges
and RCRA/CERCLA Wastes). Sills are defined as:
1. All industrial users subject to Categorical Pretreatment Standards under 40 Code of Federal Regulations (CFR) 403.6 and
40 CFR Chapter I, Subchapter N (see instructions); and
2. Any other industrial user that:
a. Discharges an average of 25,000 gallons per day or more of process wastewater to the treatment works (with certain
exclusions); or
b. Contributes a process wastestream that makes up 5 percent or more of the average dry weather hydraulic or organic
capacity of the treatment plant; or
c. Is designated as an SIU by the control authority.
G. Combined Sewer Systems. A treatment works that has a combined sewer system must complete Part G (Combined Sewer
Systems).
ALL APPLICANTS MUST COMPLETE PART C (CERTIFICATION)
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 1 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro VVWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
f.. ;.. t 5 ,- N'Y ��, i v l'.,"C t,j i:, Ls ;. fn i .. :lh 1 t b a ..:d a' , �
e. ..2. 1... .?: .Y � r ) w ., .....': ....�Y .i ( "q{
.�:: " ... � �i itr. :, R }} s3 �. N
A���AP� r� � �n�:, y �R �..,
a '7�_ t a ,a. � a �.try
,.t...,i.:.,��...,.a�' ��.�r .---•J.:�h:>x> a .Ss....;
� ? c� t s •< A l ;t u# „j. �. r
� ";,'sL• h.,,, L. �. 51 ✓ 4 :.J '� h±'.��ti'" 1 , .,` ij
� � ', �.. .� Ni i.0 AS' :wS.A t
�,F � � 1, ..� �,t , y �
r � k
'�fe. r� :t 'F�'-:S 3. tr a., w. .w
:+I.. fi., l.. .r. ... ...r ,.r -.. t....�5•r.!.... ��r; 4�r .e.. J,'�«a.. zK ... "�',':��isa a`...
.:..
• .' e - T: . . .fie ..,. .R is ^. I! rtl..
PART A..BASIC,A . �ICAT(oN` N .O ZIO : �FQ L ., ._zr 4
. .... -. ... � S.. ':.. i ..: t,w.. .. ., i>a,,. ^.,'..64 �- P ;-,vTl+,,� +� .i1 .. CL n , � n♦ .-.-.�,5�[ _.. _i _.._ _� y frrY e...,N .._ Jnf^+'•� Ares"H''Ki. .r i:',ffiY: _ •� %A' .�.:il'l ._._ e. n... i,. _. :t•3":r� . .i. u-'3;,
V
All treatment works must complete questions A.1 through A.8 of this Basic Application Information Packet.
.f
A.1. Facility Information.
Facility Name Town of Oakboro WWTP
Mailing Address PO Box 610
Oakboro, NC 28129-0610
Contact Person Jim Amaral
Title WWTP ORC
Telephone Number [phone]
Facility Address 24939-B Barbee's Grove Road
(not P.O. Box) Oakboro. NC 28129
A.2. Applicant information. If the applicant is different from the above, provide the following:
Applicant Name Town of Oakboro
Mailing Address PO Box 610
Oakboro, NC 28129
Contact Person Danny R. Long
Title Mayor
Telephone Number [phone]
Is the applicant the owner or operator (or both) of the treatment works?
to the facility or the applicant.
environmental permits that have been issued to the treatment works
PSD
0 owner 0 operator
Indicate whether correspondence regarding this permit should be directed
0 facility 0 applicant
A.3. Existing Environmental Permits. Provide the permit number of any existing
(include state -issued pemiits).
NPDES NC0043532
UIC Other WQ0005387
RCRA Other
A.4. Collection System Information. Provide information on municipalities and areas served by the facility. Provide the name and population of each
entity and, if known, provide information on the type of collection system (combined vs. separate) and its ownership (municipal, private, etc.).
Name Population Served Type of Collection System Ownership
Oakboro 1890 Separate Municipal
Stanfield 1520 Separate Municipal
Locust 2950 Separate Municipal
Total population served 6360
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 2 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
A.5. Indian Country.
a. Is the treatment works located in Indian Country?
❑ Yes ® No
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
b. Does the treatment works discharge to a receiving water that is either in Indian Country or that is upstream from (and eventually flows
through) Indian Country?
❑ Yes ® No
A.6. Flow. Indicate the design flow rate of the treatment plant (i.e., the wastewater flow rate that the plant was built to handle). Also provide the
average daily flow rate and maximum daily flow rate for each of the last three years. Each year's data must be based on a 12-month time period
with the 12th month of "this year" occurring no more than three months prior to this application submittal.
a. Design flow rate 1.2 mgd
b. Annual average daily flow rate
c. Maximum daily flow rate
Two Years Ago
.393
Last Year This Year
.368 .496
1.28 1.22
1.80
A.7. Collection System. Indicate the type(s) of collection system(s) used by the treatment plant. Check all that apply. Also estimate the percent
contribution (by miles) of each.
® Separate sanitary sewer a/o
❑ Combined storm and sanitary sewer
A.8. Discharges and Other Disposal Methods.
a. Does the treatment works discharge effluent to waters of the U.S.? ® Yes 0 No
If yes, list how many of each of the following types of discharge points the treatment works uses:
i. Discharges of treated effluent
2
ii. Discharges of untreated or partially treated effluent 0
iii. Combined sewer overflow points 0
iv. Constructed emergency overflows (prior to the headworks) 0
v. Other
b. Does the treatment works discharge effluent to basins, ponds, or other surface impoundments
that do not have outlets for discharge to waters of the U.S.? 0 Yes
If yes, provide the following for each surface impoundment:
Location:
® No
Annual average daily volume discharge to surface impoundment(s)
Is discharge 0 continuous or 0 intermittent?
c. Does the treatment works land -apply treated wastewater?
If yes, provide the following for each land application site:
Location:
Number of acres:
O Yes
mgd
No
Annual average daily volume applied to site: mgd
Is land application ❑ continuous or
0 intermittent?
d. Does the treatment works discharge or transport treated or untreated wastewater to another
treatment works?
❑ Yes ® No
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 3 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
If yes, describe the mean(s) by which the wastewater from the treatment works is discharged or transported to the other treatment works
(e.g., tank truck, pipe).
If transport is by a party other than the applicant, provide:
Transporter Name
Mailing Address
Contact Person
Title
Telephone Number f )
For each treatment works that receives this discharge, provide the following:
Name
Mailing Address
Contact Person
Title
Telephone Number S )
If known, provide the NPDES permit number of the treatment works that receives this discharge
Provide the average daily flow rate from the treatment works into the receiving facility. mgd
e. Does the treatment works discharge or dispose of its wastewater in a manner not included
in A.8. through A.8.d above (e.g., underground percolation, well injection): ❑ Yes ® No
If yes, provide the following for each disposal method:
Description of method (including location and size of site(s) if applicable):
Annual daily volume disposed by this method:
Is disposal through this method 0 continuous or 0 intermittent?
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 4of22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WVVTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
WASTEWATER DISCHARGES:
If you answered "Yes" to question A.8.a, complete questions A.9 through A.12 once for each outfall (including bypass points) through
which effluent is discharged. Do not include information on combined sewer overflows in this section. If you answered "No" to Question
A.8.a, go to Part B, "Additional Application Information for Applicants with a Design Flow Greater than or Equal to 0.1 mgd."
A.9. Description of Outfall.
a. Outfall number 002
b. Location Oakboro
28129
(City or town, if applicable)
Stanly
(Zip Code)
NC
(County)
35° 14' 8.85" W
(State)
80° 16' 7.9" N
(Latitude)
c. Distance from shore (if applicable)
d. Depth below surface (if applicable)
(Longitude)
ft.
ft.
e. Average daily flow rate mgd
f. Does this outfall have either an intermittent or a periodic discharge? ® Yes 0 No (go to A.9.g.)
If yes, provide the following information:
Number f times per year discharge occurs: 365 days/week
Average duration of each discharge: 30 minutes
Average flow per discharge: 0.01 mgd
Months in which discharge occurs: 12
g. Is outfall equipped with a diffuser? ® Yes ❑ No
A.10. Description of Receiving Waters.
a. Name of receiving water Rocky River
b. Name of watershed (if known)
United States Soil Conservation Service 14-digit watershed code (if known):
c. Name of State Management/River Basin (if known): Yadkin
United States Geological Survey 8-digit hydrologic cataloging unit code (if known):
d. Critical low flow of receiving stream (if applicable)
acute cfs chronic cfs
e. Total hardness of receiving stream at critical low flow (if applicable): mg/I of CaCO3
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 5 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
A.11. Description of Treatment
a. What level of treatment are provided? Check all that apply.
❑ Primary ® Secondary
❑ Advanced ❑ Other. Describe:
b. Indicate the following removal rates (as applicable):
Design BOD5 removal or Design CBOD5 removal 85
Design SS removal 85 %
Design P removal Y.
Design N removal %
Other %
c. What type of disinfection is used for the effluent from this outfall? If disinfection varies by season, please describe:
Chlorine Gas
If disinfection is by chlorination is dechlorination used for this outfall? ® Yes ❑ No
Does the treatment plant have post aeration? ® Yes ❑ No
A.12. Effluent Testing Information. All Applicants that discharge to waters of the US must provide effluent testing data for the following
parameters. Provide the indicated effluent testing required by the permitting authority for each outfall through which effluent is
discharged. Do not include information on combined sewer overflows in this section. All information reported must be based on data
collected through analysis conducted using 40 CFR Part 136 methods. In addition, this data must comply with QA/QC requirements of
40 CFR Part 136 and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a
minimum, effluent testing data must be based on at least three samples and must be no more than four and one-half years apart.
Outfall number: 002
PARAMETER
MAXIMUM DAILY VALUE
AVERAGE DAILY VALUE
Value
Units
Value
Units
Number of Samples
pH (Minimum)
6.2
s.u.1..
,.
pH (Maximum)
7.2
s.u.
Flow Rate
1.21
MGD
.367
MGD
365
Temperature (Winter)
15
°C
11.1
°C
260
Temperature (Summer)
26
°C
20.8
°C
260
* For pH please report a minimum and a maximum daily value
POLLUTANT
MAXIMUM DAILY
DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
METHOD
ML/MDL
Conc.
Units
Conc.
Units
Number of
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
BIOCHEMICAL OXYGEN
DEMAND (Report one)
BOD5
62.7
mg/L
4.9
mg/L
156
SM5210B
2.0
CBOD5
_
FECAL COLIFORM
910
c1100 mL
11
c/100mL
156
SM9222D
1.0
TOTAL SUSPENDED SOLIDS (TSS)
122
mg/L
6.9
mg/L
156
SM2540D
2.5
END OF PART A.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 6 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro V V TP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
t...:.,..°,.
PLAA""I3
. ,
tr4
r•.t1i.,�e
i :f �;:4t : ,k,
ti .u.; ...✓ f �1!.+ -,... ...7 *..s ; .`", e � � � �}�� 5r '. .. .. �3^E ., ... 4�... ...
.4
PART' B. ADDITIONAL
APPLIQATION1 R A rIoN FQ t: APP CAN 0WITH A DESIGN FLOW GREA 'ER THAN OR
. ,' EQC
AL` ' O 01 [GQ {100 000- ailoins per da )
All applicants with a design flow rate z 0.1 mgd must answer questions B.1 through B.6. All others go to Part C (Certification).
B.1. Inflow and Infiltration. Estimate the average number of gallons per day
50,000 gpd
that flow into the treatment works from inflow and/or infiltration.
Briefly explain any steps underway or planned to minimize inflow and infiltration.
In November 2012, the Town started an I/1 project consisting of replacing sewer lines, manholes and also slip lining aged
lines. This project is roughly 75% completed and it has significantly cut down the town's inflow and infiltration problem.
B.2. Topographic Map. Attach to this application a topographic map of the area extending at least one mile beyond facility property boundaries. This
map must show the outline of the facility and the following information. (You may submit more than one map if one map does not show the entire
area.)
a. The area surrounding the treatment plant, including all unit processes.
b. The major pipes or other structures through which wastewater enters the treatment works and the pipes or other structures through which
treated wastewater is discharged from the treatment plant. Include outfalls from bypass piping, if applicable.
c. Each well where wastewater from the treatment plant is injected underground.
d. Wells, springs, other surface water bodies, and drinking water wells that are: 1) within Y. mile of the property boundaries of the treatment
works, and 2) listed in public record or otherwise known to the applicant.
e. Any areas where the sewage sludge produced by the treatment works is stored, treated, or disposed.
f. If the treatment works receives waste that is classified as hazardous under the Resource Conservation and Recovery Act (RCRA) by truck, rail,
or special pipe, show on the map where the hazardous waste enters the treatment works and where it is treated, stored, and/or disposed.
B.3. Process Flow Diagram or Schematic. Provide a diagram showing the processes of the treatment plant, including all bypass piping and all
backup power sources or redunancy in the system. Also provide a water balance showing all treatment units, including disinfection (e.g.,
chlorination and dechlorination). The water balance must show daily average flow rates at influent and discharge points and approximate daily flow
rates between treatment units. Include a brief narrative description of the diagram.
B.4. Operation/Maintenance Performed by Contractor(s).
Are any operational
contractor?
or maintenance aspects (related to wastewater treatment
and effluent quality) of the treatment works the responsibility of a
• Yes 0 No
If yes, fist the name, address, telephone number, and status of each contractor and describe the contractor's responsibilities (attach additional
pages if necessary).
Name:
Mailing Address:
Telephone Number
( )
Responsibilities
of Contractor:
B.5. Scheduled improvements
and Schedules of implementation. Provide information on any uncompleted implementation schedule or
uncompleted plans for improvements that will affect the wastewater treatment, effluent quality, or design capacity of the treatment works. If the
treatment works has several different implementation schedules or is planning several improvements, submit separate responses to question B.5
for each. (If none, go to question B.6.)
a. List the outfall number (assigned in question A.9) for each outfall that is covered by this implementation schedule.
b. Indicate whether the planned improvements or implementation schedule are required by local, State, or Federal agencies.
❑
Yes ■ No
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 7 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
c. If the answer to B.5.b is "Yes," briefly describe, including new maximum daily inflow rate (if applicable).
d. Provide dates imposed
applicable. For improvements
applicable. Indicate
Implementation Stage
- Begin Construction
- End Construction
- Begin Discharge
- Attain Operational
e. Have appropriate
Describe briefly:
by any compliance schedule
planned independently
dates as accurately as possible.
Level
pemtits/clearances concerning other
or any actual dates of completion for the implementation steps listed
of local, State, or Federal agencies, indicate planned or actual completion
Schedule Actual Completion
MM/DD/YYYY MM/DD/YYYY
below, as
dates, as
Yes 0 No
/ / / /
/ / / /
/ / / /
/ / / /
Federal/State requirements been obtained? ❑
B.6. EFFLUENT TESTING DATA (GREATER THAN 0.1 MGD
Applicants that discharge to waters of the US must
effluent testing required by the permitting authority
on combine sewer overflows in this section. All information
using 40 CFR Part 136 methods. In addition, this data
QA/QC requirements for standard methods for analytes
based on at least three pollutant scans and must be
Outfall Number: 002
ONLY).
provide effluent testing data for the following parameters. Provide
for each outfall through which effluent Is discharged. Do not include
the indicated
information
conducted
other appropriate
data must be
reported must be based on data collected through analysis
must comply with QA/QC requirements of 40 CFR Part 136 and
not addressed by 40 CFR Part 136. At a minimum effluent testing
no more than four and on -half years old.
g
POLLUTANT
g•MAXIMUM PAILy, r•
f DISCNAi�Gfi; I
> . AVERAGE DAILY D SC• HARGE•
_ 1
fc
` ' AMA> YTiCAL
METHOD_
s
'
f DL: ,
Conc
t _
Units •
>
-' Conc '
Units
Numbeeof
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
AMMONIA (as N)
7.5
mglL
0.24
mglL
156
SM4500NH3F
0.5
CHLORINE (TOTAL
RESIDUAL, TRC)
26
mg1L
3.1
Iig1L
156
SM4500-CI G
10
DISSOLVED OXYGEN
11.5
mglL
7.26
mglL
260
SM4500 0 G
1.0
TOTAL KJELDAHL
NITROGEN (TKN)
51
mg/L
27
mg/L
4
SM4S00NH3D
1.0
NITRATE PLUS NITRITE
NITROGEN
50
mg!L
20
mg/L
4
SM4500NO3F
0.05
OIL and GREASE
PHOSPHORUS (Total)
4.1
mglL
3.1
mglL
4
SM4500P-F
0.05
TOTAL DISSOLVED SOLIDS
(TDS)
OTHER
;taJ
,
''i.',T,�t�:Y,�cei .+,�.iYK',�. R.c.r.ZA•. ,,4.w...tT..$l
.;�; :«_ r�e".
.
', rlw. -nx,
•
�>°7-
1�yI l.��}T�
;.4" -�: .tir7., U ffir.y�f.3..R'Q."1PSy'. Ff<�•'�45{,l...i!/.a.'�...riel:r..1.v., .:'Y1..,v:.ff...' .1,6':t.!�l/-:l �._r•a,�.��xYiW'\I" I�+,a,�, •.i . 34 {
r
ti,,,,, (;1, i..-rii st.:Yrr>;)
rw j..��� �
:a^3dl•;.";� 'fi
E
azrC1 .J4'F
{k
i1.f',.^:.
'4F',M+1rr�l,.1tt.{1.il•.l..�S�.° �''°Xa%'x..'i�,-.;•F...
7n.
4
r,1°. . !
.yEiR' .R.'f
.,
wIwVi
9• T r-
b.,•
'..
'
.i , r". , 1 e`e F.,zr.
.iF>
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 8 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro VVWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
S.UPPL.EM NT . L APPLICATION F` t Q
��RT :s
� -...f i 'r`'r ,?�, u y r� - '1 F a r�
, ,
s s �k r ;* t r t {
6 z - s.'' r s
PART Dr EXPANDED=EFFLUENT, TESTING°D,i4'TA iY Yp I _ _._, x S s ,
Refer to the directions on the cover page to determine whether this section applies to the treatment works.
Effluent Testing: 1.0 mgd
to have) a pretreatment program,
pollutants. Provide the indicated
effluent is discharged. Do
and Pretreatment Works. If the treatment works has a design flow greater than or equal to 1.0
or is otherwise required by the permitting authority to provide the data, then provide effluent
effluent testing information and any other information required by the permitting authority
not include information on combined sewer overflows in this section. All information reported must
using 40 CFR Part 136 methods. In addition, these data must comply with QA/QC requirements
for standard methods for analytes not addressed by 40 CFR Part 136. Indicate in the
pollutants not specifically listed in this form. At a minimum, effluent testing data must be based
than four and one-half years old.
(Complete once for each outfall discharging effluent to waters of the United
mgd or it has (or is required
testing data for the following
for each outfall through which
be based on data collected
of 40 CFR Part 136 and
blank rows provided below
on at least three pollutant
States.)
through analyses conducted
other appropriate QA/QC requirements
any data you may have on
scans and must be no more
Outfall number:
POLLUTANT
MAXIMUM DAILY DISCHARGE
•AVER•AGE DAI1LY.DISCHARGE : �-
ANALYTICAL
METHOD•
MUMDt,
Conc.
Units';
Massy
Units
Conc.
Units
Mass
.Units
Nulrblar
of
Samples _
METALS (TOTAL RECOVERABLE), CYANIDE, PHENOLS, AND HARDNESS.
ANTIMONY
ARSENIC
BERYLLIUM
CADMIUM
CHROMIUM
COPPER
28.9
pg/L
9.1
pg/L
25
EPA 200.7
5.0
LEAD
MERCURY
NICKEL
SELENIUM
SILVER
THALLIUM
ZINC
110
pg/L
69.8
pg/L
5
EPA 200.7
10.0
CYANIDE
.0075
mg/L
.0075
mg/L
1
SM 4500-CN-E
.0050
TOTAL PHENOLIC
COMPOUNDS
.0085
mg/L
.0085
mg/L
1
EPA 420.4
.0050
HARDNESS (as CaCO3)
81900
pg/L
81900
pg/L
1
EPA 200.7
662
Use this space (or a separate sheet) to provide information on other metals requested by the permit writer
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 10 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
c- . • ' • "' '
.-POLLUTANT , :
- , - .,:. , • .
* i*VolinPM OVVDisci:140 :,,?;".,-i,1:
VERAGE DAILY DISCHARGE ...1*-:-...:::?
.'-):7'. -,:.•;Li'::.-:,, :
'i'',.,. ,7 • ANALYTICAL-
METHOD. , ','
- - ,. .,
.:;:ii.1,-:' . '
: !' , ''
',, ' , ', •
-,- • -,, '
.:-; ,',
Conc.
,,-,.-.2:4-
,,:---,;''',.!::
Units'::
. : :, :.1..:
,, -„, •
:
• , .:
::;-;:::1", ‘,
'1,:PO '
,,,..-,1-' ,. ,
,\ .','
.fi Oi'.:1;
:, .,,,, --:-
..;S*1:,; '
' , ' ,:
...,-•:
,,iz:.:
: ,Ntaes.*'.
,...i.,;,•:).-',,
''. n :
• , ',._.
44 , '''.
:i' -:'*:•ar,--,',--',..'-,
'samplcik-„2.!'.,
VOLATILE ORGANIC COMPOUNDS
ACROLEIN
ACRYLONITRILE
BENZENE
BROMOFORM
CARBON
TETRACHLORIDE
CHLOROBENZENE
CHLORODIBROMO-
METHANE
CHLOROETHANE
2-CHLOROETHYLVINYL
ETHER
CHLOROFORM
DICHLOROBROMO-
METHANE
1,1-DICHLOROETHANE
1,2-DICHLOROETHANE
TRANS-1,2-DICHLORO-
ETHYLENE
1,1-DICHLORO-
ETHYLENE
1,2-DICHLOROPROPANE
1,3-DICHLORO-
PROPYLENE
ETHYLBENZENE
METHYL BROMIDE
METHYL CHLORIDE
METHYLENE CHLORIDE
1,1,2,2-TETRA-
CHLOROETHANE
TETRACHLORO-
ETHYLENE
TOLUENE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 11 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT
I iAXIMUM DAILY QISGH RGE
"'' AVERAGE DAILY DISCHAR��
k ` '
ANALYTICAL
METNt�a
M DL
-Cortc
U#tits
Mass
; Uhr :
Coma
Units `
'`
Mass
Units
Numlt�er
;of _
1,1,1-
TRICHLOROETHANE
1,1,2-
TRICHLOROETHANE
TRICHLOROETHYLENE
VINYL CHLORIDE
Use this space (or a separate sheet) to
provide information
on
other volatile organic
compounds
requested
by the permit
writer
ACID -EXTRACTABLE COMPOUNDS
P-CHLORO-M-CRESOL
2-CHLOROPHENOL
2,4-DICHLOROPHENOL
2,4-DIMETHYLPHENOL
4,6-D I N ITRO-O-C RESO L
2,4-DINITROPHENOL
2-NITROPHENOL
4-NITROPHENOL
PENTACHLOROPHENOL
PHENOL
2,4,6-
TRICHLOROPHENOL
Use this space (or a separate sheet) to
provide information
on
other acid-extractab
e compounds
reques
ed by the permit
writer
BASE -NEUTRAL COMPOUNDS
ACENAPHTHENE
ACENAPHTHYLENE
ANTHRACENE
BENZIDINE
BENZO(A)ANTHRACENE
BENZO(A)PYRENE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 12 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro VVWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT
, 1�lAXIMUM DAILY ISCHARGI , r
, , ' ; AVERAGE D�AIL=, Y DISCHARGE
, ,`` x
ANALYTICAL
METHQD
..
_MLIMDL
,,,...
Donc.
S:
" Units
M&s
Unfits
...
`,
Cortc.
4.
• tilts
:z .......�c:....•
r
Mass
Units
...
Numbert
of,
Samples
3,4 BENZO-
FLUORANTHENE
BENZO(GHI)PERYLENE
BENZO(K)
FLUORANTHENE
BIS (2-CHLOROETHOXY)
METHANE
BIS (2-CHLOROETHYL)-
ETHER
BIS (2-CHLOROISO-
PROPYL) ETHER
BIS (2-ETHYLHEXYL)
PHTHALATE
7.4
Ng/L.
7.4
pg/L
1
EPA 625
5.0
4-BROMOPHENYL
PHENYL ETHER
BUTYL BENZYL
PHTHALATE
2-CHLORO-
NAPHTHALENE
4-CHLORPHENYL
PHENYL ETHER
CHRYSENE
DI-N-BUTYL PHTHALATE
DI-N-OCTYL PHTHALATE
DIBENZO(A,H)
ANTHRACENE
1,2-DICHLOROBENZENE
1,3-DICHLOROBENZENE
1,4-DICHLOROBENZENE
3,3-DICHLORO-
BENZIDINE
DIETHYL PHTHALATE
DIMETHYL PHTHALATE
2,4-DINITROTOLUENE
2,6-DINITROTOLUENE
1,2-DIPHENYL-
HYDRAZINE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 13 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro VWVTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
Outfall number: (Complete
once for each outfa I discharging effluent to waters of the United States.)
POLLUTANT
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
METHOD
MLIMDL
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
Number
of
Samples
FLUORANTHENE
FLUORENE
HEXACHLOROBENZENE
HEXACHLORO-
BUTADIENE
HEXACHLOROCYCLO-
PENTADIENE
HEXACHLOROETHANE
INDENO(1,2,3-CD)
PYRENE
ISOPHORONE
NAPHTHALENE
NITROBENZENE
N-NITROSODI-N-
PROPYLAMINE
N-NITROSODI-
METHYLAMINE
N-NITROSODI-
PHENYLAMINE
PHENANTHRENE
PYRENE
1,2,4-
TRICHLOROBENZENE
Use this space (or a separate sheet) to provide information on other base -neutral compounds requested by the permit writer
Use this space (or a separate sheet) to provide information on other pollutants (e.g , pesticides) requested by the permit writer
END OF PART D.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 14 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of the
facility's discharge points: 1) POTWs with a design flow rate greater than or equal to 1.0 mgd; 2) POTWs with a pretreatment program (or those that are
required to have one under 40 CFR Part 403); or 3) POTWs required by the permitting authority to submit data for these parameters.
• At a minimum, these results must include quarterly testing for a 12-month period within the past 1 year using multiple species (minimum of two
species), or the results from four tests performed at least annually in the four and one-half years prior to the application, provided the results show
no appreciable toxicity, and testing for acute and/or chronic toxicity, depending on the range of receiving water dilution. Do not include
information on combined sewer overflows in this section. All information reported must be based on data collected through analysis conducted
using 40 CFR Part 136 methods. In addition, this data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate QA/QC
requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition, submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity test
conducted during the past four and one-half years revealed toxicity, provide any information on the cause of the toxicity or any results of a toxicity
reduction evaluation, if one was conducted.
• If you have already submitted any of the information requested in Part E, you need not submit it again. Rather, provide the information requested
in question E.4 for previously submitted information. If EPA methods were not used, report the reasons for using alternate methods. If test
summaries are available that contain all of the information requested below, they may be submitted in place of Part E.
If no biomonitoring data is required, do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent
❑ chronic 0 acute
E.2. Individual Test Data. Complete the
column per test (where each species
toxicity tests conducted in the past four and one-half years.
following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
constitutes a test). Copy this page
Test number: October 2012
if
more than three tests are being reported.
Test number: January 2013
Test number: April 2013
a. Test information.
Test Species & test method number
Ceriodaphnia dubia
ChronicToxicity Test
Ceriodaphnia dubia
Chronic Toxicity Test
Ceriodaphnia dubia
Chronic Toxicity Test
Age at initiation of test
<24 hrs.
<24 hrs.
<24 hrs.
Outfall number
002
002
002
Dates sample collected
10/9/12 & 10/11/12
1/22/13 & 1/24/13
4/16/13 & 4/18/13
Date test started
10/10/12
1/23/13
4/17/13
Duration
24 hrs.
24 hrs.
24 hrs.
b. Give toxicity test methods followed.
Manual title
NC Chronic Toxicity Whole
Effluent Toxicity Test
NC Chronic Toxicity Whole
Effluent Toxicity Test
NC Chronic Toxicity Whole
Effluent Toxicity Test
Edition number and year of publication
Page number(s)
c. Give the sample collection method(s) used. For multiple grab samples, indicate the number of grab samples used.
24-Hour composite
X
X
X
Grab
d. Indicate where the sample was taken in relation to disinfection. (Check all that apply for each.
Before disinfection
After disinfection
After dechlorination
X
X
X
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 15 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro VWVfP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
Test number: Test number: Test number:
e. Describe the point in the treatment process at which the sample was collected.
Sample was collected:
Effluent after Cl2 & SO2
Effluent after Cl2 & SO2
Effluent after Cl2 & SO2
f. For each test, include whether the test was intended to assess chronic toxicity, acute toxicity, or both
Chronic toxicity
X
X
X
Acute toxicity
g. Provide the type of test performed.
Static
Static -renewal
X
X
X
Flow -through
h. Source of dilution water. If laboratory water, specify type; if receiving water, specify source.
Laboratory water
X
X
X
Receiving water
i. Type of dilution water. If salt water, specify "natural" or type of artificial sea salts or brine used.
Fresh water
X
X
X
Salt water
j. Give the percentage effluent used for all concentrations in the test series.
4.6 %
4.6 %
4.6 %
k. Parameters measured during the test. (State whether parameter meets test method specifications)
pH
X
X
X
Salinity
Temperature
X
X
X
Ammonia
Dissolved oxygen
X
X
X
I. Test Results.
Acute:
Percent survival in 100%
effluent
%
%
%
LC50
95% C.I.
%
%
Control percent survival
Other (describe)
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 16 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
Chronic:
NOEC
4.6 %
4.6 %
4.6 %
IC25
Control percent survival
%
%
Other (describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available?
Yes
Yes
Yes
Was reference toxicant test within
acceptable bounds?
Yes
Yes
Yes
What date was reference toxicant test
run (MM/DD/YYYY)?
/ /
/ /
/ /
Other (describe)
Conducted Quarterly
Conducted Quarterly
Conducted Quarterly
E.3. Toxicity Reduction Evaluation.
❑ Yes ® No
Is the treatment works involved in a Toxicity Reduction Evaluation?
If yes, describe:
E.4. Summary of Submitted Biomonitoring Test Information. If you have
cause of toxicity, within the past four and one-half years, provide the dates
of the results.
Date submitted: / / (MM/DD/YYYY)
submitted biomonitoring test information, or information regarding the
the information was submitted to the permitting authority and a summary
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 17 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA,
complete part F.
GENERAL INFORMATION:
F.1. Pretreatment program. Does the treatment works have, or is subject ot, an approved pretreatment program?
❑ Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number
industrial users that discharge to the treatment works.
a. Number of non -categorical SlUs.
or other remedial wastes must
of each of the following types of
questions F.3 through F.8 and
b. Number of CIUs.
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy
provide the Information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name:
Mailing Address:
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s):
Raw material(s):
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the
day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
collection system in gallons per
into the collection system
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes 0 No
b. Categorical pretreatment standards 0 Yes 0 No
If subject to categorical pretreatment standards, which category and subcategory?
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 18 of 22

'FACILITY NAME AND PERMIT NUMBER:
Oakboro VVWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes 0 No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes 0 No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
0 Truck 0 Rail 0 Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
0 Yes (complete F.13 through F.15.) 0 No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment.
a. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
b. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous 0 Intermittent If intermittent, describe discharge schedule.
END OF PARTF.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 19 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro VWVTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
SUPPLEMENTAL APPLICATION INFORMATION
PART G. COMBINED SEWER SYSTEMS
If the treatment works has a combined sewer system, complete Part G.
G.1. System Map. Provide a map indicating the following: (may be included with Basic Application Information)
a. All CSO discharge points.
b. Sensitive use areas potentially affected by CSOs (e.g., beaches, drinking water supplies, shellfish beds, sensitive aquatic ecosystems, and
outstanding natural resource waters).
c. Waters that support threatened and endangered species potentially affected by CSOs.
G.2. System Diagram. Provide a diagram, either in the map provided in G.1 or on a separate drawing, of the combined sewer collection system that
includes the following information.
a. Location of major sewer trunk lines, both combined and separate sanitary.
b. Locations of points where separate sanitary sewers feed into the combined sewer system.
c. Locations of in -line and off-line storage structures.
d. Locations of flow -regulating devices.
e. Locations of pump stations.
CSO OUTFALLS:
Complete questions G.3 through G.6 once for each CSO discharge point.
G.3. Description of Outfall.
a. Outfall number
b. Location
(City or town, if applicable) (Zip Code)
(County) (State)
(Latitude) (Longitude)
c. Distance from shore (if applicable) ft.
d. Depth below surface (if applicable) ft.
e. Which of the following were monitored during the last year for this
❑ Rainfall ❑ CSO pollutant concentrations
❑ CSO flow volume 0 Receiving water quality
f. How many storm events were monitored during the last year?
G.4. CSO Events.
a. Give the number of CSO events in the last year.
events (0 actual or 0 approx.)
CSO?
0 CSO frequency
b. Give the average duration per CSO event.
hours (0 actual or 0 approx.)
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 20 of 22

FACILITY NAME AND PERMIT NUMBER:
Oakboro WWTP, NC0043532
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Rocky River
G.5.
G.6.
c. Give the average volume per CSO event.
million gallons (0 actual or ❑ approx.)
d. Give the minimum rainfall that caused a CSO event in the last year
Inches of rainfall
Description of Receiving Waters.
a. Name of receiving water:
b. Name of watershed/river/stream system:
United State Soil Conservation Service 14-digit watershed code
c. Name of State Management/River Basin:
(if known):
United States Geological Survey 8-digit hydrologic cataloging unit
CSO Operations.
Describe any known water quality impacts on the receiving water caused
intermittent shell fish bed closings, fish kills, fish advisories, other recreational
code (if known):
by this CSO (e.g., permanent or intermittent beach closings, permanent or
loss, or violation of any applicable State water quality standard).
END OF PART G.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 21 of 22

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Scale: 1" = 2000•
TE: 7108
DWG. NO.:
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APPROVED BY:
Oalthoro Waste Water Treatment Plant
1 Vicinity Map
1 1 of i

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------/ Town of Oakboro - NC0043532
./.: Discharge Point (001)
J1.4
\\_± Existing: Latitude: 35°14'08"
Longitude: 80°16°00"
Proposed Latitude: 35°12'41"
Longtude: 80°15'16"
. t L.
ROAD CLASSIFICATION
PRIMARY HIGHWAY
HARD SURFACE 111111111111111111
SECONDARY HIGHWAY
HARD SURFACE =MC=
UGHT•DUTY ROAD. HARD OR
IMPROVED SURFACE
UNIMPROVED ROAD = = =
Latitude 35°12'41" Longitude 80°15'16"
Map 4LGERE___ Sub -basin 03-07-13
Stream Class C
Discharge Class Industrial/Domestic
Receiving Stream Rocky River
Design 0 0.9 MGD Permit expires 11/30/99
SCALE 1:24 000
1 MILE
7000 FEET
1
0
1 KILOMETER
•
CONTOUR INTERVAL 10 FEET
Town of Oakboro WWTP
NC0043532
Stanly County

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Emergency Outfall 001
139
St Martin'
Town of Oakboro WWTP - NC0043532
SGS Quad Name: Oakboro
Receiving Stream: Rocky River; Long Creek
Stream Class: C
Subbasin: Yadkin — 03-07-14; 03-07-13
002 [Rocky River]
Latitude: 35°12'41"
Longitude: 80°15'16"
001 [Long Creek]
Latitude: 35°14'08"
Longitude: 80°16'00"
Facility
Location
•
North
Not to SCALE

3bwn Of 0cik6oro
109-A N. Main St. — PO Box 610
Oakboro, NC 28129
704-485-3351/ 704-485-2439 (fax)
www.oakboro.com
Sludge Management
The Town of Oakboro WWTP utilizes a 400,000
gallon aerobic digester with two (2) floating
aerators.
Synagro Inc. is the Town's contractor operator,
which handles permitting, reporting and land
application. At present we have approximately 143.8
acres of permitted land.
If further information is needed see permit
WQ0005387 or contact this office.
James J. Amaral
Phone: [phone]
Email: [e-mail]

e Pace Analytical Services, Inc. Pace Analytical Services, Inc. Pace Analytical Services, Inc.
aceAncal 205 East Meadow Road - Suite A 2225 Riverside Dr. 9800 Kincey Ave. Suite 100
Eden, NC 27288 Asheville, NC 28804 Huntersville, NC 28078
[phone] [phone] [phone]
wwwwpacelebs:Coat
Project: Oakboro EFF PPA
Pace Project No.: 92157948
CERTIFICATIONS
Charlotte Certification IDs
9800 Kinney Ave. Ste 100, Huntersville, NC 28078
North Carolina Drinking Water Certification #: 37706
North Carolina Field Services Certification #: 5342
North Carolina Wastewater Certification #: 12
South Carolina Certification #: 99006001
Florida/NELAP Certification #: E87627
Kentucky UST Certification #: 84
West Virginia Certification #: 357
VirginiaNELAP Certification #: 460221
Asheville Certification IDs
2225 Riverside Dr., Asheville, NC 28804
Florida/NELAP Certification #: E87648
Massachusetts Certification #: M-NC030
North Carolina Drinking Water Certification #: 37712
North Carolina Wastewater Certification #: 40
South Carolina Certification #: 99030001
West Virginia Certification #: 356
VirginiaNELAP Certification #: 460222
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, Inc.. Page 2 of 22

i
Amok,
'aceAnalytical
www.pacelabs.cem
Project: Oakboro EFF PPA
Pace Project No.: 92157948
Pace Analytical Services, Inc. Pace Analytical Services, Inc. Pace Analytical Services, Inc.
205 East Meadow Road - Suite A 2225 Riverside Dr. 9800 Kincey Ave. Suite 100
Eden, NC 27288 Asheville, NC 28804 Huntersville, NC 28078
[phone] [phone] [phone]
ANALYTICAL RESULTS
Sample: Oakboro WWfP #4-6 Lab ID: 92157948002 Collected: 05/14/13 08:18 Received: 05/14/13 16:00 Matrix: Water
Parameters
Results Units Report Limit DF Prepared Analyzed CAS No. Qual
625 MSSV Analytical Method: EPA 625 Preparation Method: EPA625
Dimethylphthalate ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 131-11-3
Di-n-butylphthalate ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 84-74-2
4,6-Dinitro-2-methylphenol ND ug/L 20.0 1 05/15/13 08:30 05/17/13 00:36 534-52-1
2,4-Dinitrophenol ND ug/L 50.0 1 05/15/13 08:30 05/17/13 00:36 51-28-5
2,4-Dinitrotoluene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 121-14-2
2,6-Dinitrotoluene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 606-20-2
Di-n-octylphthalate ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 117-84-0
1,2-Diphenylhydrazine ND ug/L 50 1 05/15/13 08:30 05/17/13 00:36 122-66-7
bis(2-Ethylhexyl)phthalate 7.4 ug/L F,PA - )4 k f 1.15 5..0 1 05/15/13 08:30 05/17/13 00:36 117-81-7
Fluoranthene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 206-44-0
Fluorene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 86-73-7
Hexachloro-1,3-butadiene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 87-68-3
Hexachlorobenzene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 118-74-1
Hexachlorocyclopentadiene ND ug/L 10.0 1 05/15/13 08:30 05/17/13 00:36 77-47-4
Hexachloroethane ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 67-72-1
Indeno(1,2,3-cd)pyrene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 193-39-5
Isophorone ND ug/L 10.0 1 05/15/13 08:30 05/17/13 00:36 78-59-1
3&4-Methylphenol(m&p Cresol) ND ug/L 10.0 1 05/15/13 08:30 05/17/13 00:36
Naphthalene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 91-20-3
Nitrobenzene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 98-95-3
2-Nitrophenol ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 88-75-5
4-Nitrophenol ND ug/L 50.0 1 05/15/13 08:30 05/17/13 00:36 100-02-7
N-Nitrosodimethylamine ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 62-75-9
N-Nitroso-di-n-propylamine ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 621-64-7
N-Nitrosodiphenylamine ND ug/L 10.0 1 05/15/13 08:30 05/17/13 00:36 86-30-6
Pentachlorophenol ND ug/L 25.0 1 05/15/13 08:30 05/17/13 00:36 87-86-5
Phenanthrene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 85-01-8
Phenol ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 108-95-2
Pyrene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 129-00-0
1,2,4-Trichlorobenzene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 120-82-1
2,4,6-Trichlorophenol ND ug/L 10.0 1 05/15/13 08:30 05/17/13 00:36 88-06-2
Surrogates
Nitrobenzene-d5 (S) 46 % 10-120 1 05/15/13 08:30 05/17/13 00:36 4165-60-0
2-Fluorobiphenyl (S) 44 % 15-120 1 05/15/13 08:30 05/17/13 00:36 321-60-8
Terphenyl-d14 (S) 46 % 11-131 1 05/15/13 08:30 05/17/13 00:36 1718-51-0
Phenol-d6 (S) 19 % 10-120 1 05/15/13 08:30 05/17/13 00:36 13127-88-3
2-Fluorophenol (S) 29 % 10-120 1 05/15/13 08:30 05/17/13 00:36 367-12-4
2,4,6-Tribromophenol (S) 63 % 10-137 1 05/15/13 08:30 05/17/13 00:36 118-79-6
Date: 05/30/2013 05:11 PM
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, Inc..
Page 6 of 22

7J.ceAnaIj4icaI°
wrsupeariebs.com
Project: Oakboro EFF PPA
Pace Project No.: 92157948
Pace Analytical Services, Inc. Pace Analytical Services, Inc. Pace Analytical Services, Inc.
205 East Meadow Road - SuiteA 2225 Riverside Dr. 9800 KinceyAve. Suite 100
Eden, NC 27288 Asheville, NC 28804 Huntersviile, NC 28078
[phone] [phone] [phone]
ANALYTICAL RESULTS
Sample: Oakboro WWTP #1-3 Lab ID: 92167948001 Collected: 05/14/13 07:46 Received: 05/14/13 16:00 Matrix: Water
Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual
624 Volatile Organics Analytical Method: EPA 624
Acrolein
Acrylonitrile
Benzene
Bromodichloromethane
Bromoform
Bromomethane
Carbon tetrachloride
Chlorobenzene
Chloroethane
2-Chloroethylvinyl ether
Chloroform
Chloromethane
Dibromochloromethane
1,1-Dichloroethane
1,2-Dichloroethane
1,1-Dichloroethene
trans-1,2-Dichloroethene
1,2-Dichloropropane
cis-1,3-Dichloropropene
trans-1,3-Dichloropropene
Ethylbenzene
Methylene Chloride
1,1,2,2-Tetrachloroethane
Tetrachloroethene
Toluene
1,1,1 Trichloroethane
1,1,2-Trichloroethane
Trichloroethene
Vinyl chloride
Surrogates
Dibromofluoromethane (S)
4-Bromofluorobenzene (S)
Toluene-d8 (S)
1,2-Dichloroethane-d4 (S)
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
ND ug/L
102 %
100 %
99 %
102 %
420.4 Phenolics, Total Analytical Method: EPA 420.4
Phenol 0.0085 mg/L
4500CNE Cyanide, Total Analytical Method: SM 4500-CN-E
Cyanide 0.0075 mg/L
Date: 05/30/2013 05:11 PM
100 1
50.0 1
5.0 1
5.0 1
5.0 1
10.0 1
5.0 1
5.0 1
10.0 1
10.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
5.0 1
70-130 1
70-130 1
70-130 1
70-130 1
0.0050 1
0.0050 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, Inc..
05/16/13 12:33 107-02-8
05/16/13 12:33 107-13-1
05/16/13 12:33 71-43-2
05/16/13 12:33 75-27-4
05/16/13 12:33 75-25-2
05/16/13 12:33 74-83-9
05/16/13 12:33 56-23-5
05/16/13 12:33 108-90-7
05/16/13 12:33 75-00-3
05/16/13 12:33 110-75-8
05/16/13 12:33 67-66-3
05/16/13 12:33 74-87-3
05/16/13 12:33 124-48-1
05/16/13 12:33 75-34-3
05/16/13 12:33 107-06-2
05/16/13 12:33 75-35-4
05/16/13 12:33 156-60-5
05/16/13 12:33 78-87-5
05/16/13 12:33 10061-01-5
05/16/13 12:33 10061-02-6
05/16/13 12:33 100-41-4
05/16/13 12:33 75-09-2
05/16/13 12:33 79-34-5
05/16/13 12:33 127-18-4
05/16/13 12:33 108-88-3
05/16/13 12:33 71-55-6
05/16/13 12:33 79-00-5
05/16/13 12:33 79-01-6
05/16/13 12:33 75-01-4
05/16/13 12:33 1868-53-7
05/16/13 12:33 460-00-4
05/16/13 12:33 2037-26-5
05/16/13 12:33 17060-07-0
05/30/13 15:36 108-95-2
05/21 /1316:02 57-12-5
Page 4 of 22

"\
/ aceAnalytical
wwwpecelabs.com
Project: Oakboro EFF PPA
Pace Project No.: 92157948
Pace Analytical Services, Inc.
205 East Meadow Road - Suite A
Eden, NC 27288
[phone]
Pace Analytical Services, Inc.
2225 Riverside Dr.
Asheville, NC 28804
[phone]
ANALYTICAL RESULTS
Pace Analytical Services, Inc.
9800 KinceyAve. Suite 100
Huntersville, NC 28078
[phone]
Sample: Oakboro WWTP #4-5 Lab ID: 92157948002 Collected: 05/14/13 08:18 Received: 05/14/13 16:00 Matrix: Water
Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual
200.7 MET ICP Analytical Method: EPA 200.7 Preparation Method: EPA 200.7
Antimony ND ug/L 5.0 1 05/16/13 17:35 05/19/13 17:28 7440-36-0
Arsenic ND ug/L 10.0 1 05/16/13 17:35 05/17/13 18:50 7440-38-2
Beryllium ND ug/L 1.0 1 05/16/13 17:35 05/17/13 18:50 7440-41-7
Cadmium ND ug/L 1.0 1 05/16/13 17:35 05/17/13 18:50 7440-43-9
Calcium 24300 ug/L ' 100 1 05/16/13 17:35 05/17/13 18:50 7440-70-2
Chromium ND ug/L 5.0 1 05/16/13 17:35 05/17/13 18:50 7440-47-3
Copper 16.3 ug/L �� - FM) 5.0 1 05/16/13 17:35 05/17/13 18:50 7440-50-8
Lead ND ug/L 5.0 1 05/16/13 17:35 05/17/13 18:50 7439-92-1
Magnesium 5160 ug/L f 100 1 05/16/13 17:35 05/17/13 18:50 7439-95-4
Nickel ND ug/L 5.0 1 05/16/13 17:35 05/17/13 18:50 7440-02-0
Selenium ND ug/L 10.0 1 05/16/13 17:35 05/17/13 18:50 7782-49-2
Silver ND ug/L 5.0 1 05/16/13 17:35 05/17/13 18:50 7440-22-4
Thallium ND ug/L 10.0 1 05/16/13 17:35 05/17/13 18:50 7440-28-0
Total Hardness 81900 ug/L W S- RYA- 662 1 05/16/13 17:35 05/17/13 18:50
Zinc 110 ug/L JZf4 - r(.) 10.0 1 05/16/13 17:35 05/17/13 18:50 7440-66-6
245.1 Mercury Analytical Method: EPA 245.1 Preparation Method: EPA 245.1
Mercury ND ug/L 0.20 1 05/15/13 17:25 05/16/13 15:46 7439-97-6
625 MSSV Analytical Method: EPA 625 Preparation Method: EPA 625
Acenaphthene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 83-32-9
Acenaphthylene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 208-96-8
Anthracene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 120-12-7
Benzidine ND ug/L 50.0 1 05/15/13 08:30 05/17/13 00:36 92-87-5
Benzo(a)anthracene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 56-55-3
Benzo(a)pyrene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 50-32-8
Benzo(b)fluoranthene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 205-99-2
Benzo(g,h,i)perylene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 191-24-2
Benzo(k)fluoranthene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 207-08-9
4-Bromophenylphenyl ether ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 101-55-3
Butylbenzylphthalate ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 85-68-7
bis(2-Chloroethoxy)methane ND ug/L 10.0 1 05/15/13 08:30 05/17/13 00:36 111-91-1
bis(2-Chloroethyl) ether ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 111-44-4
bis(2-Chloroisopropyl) ether ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 108-60-1
2-Chloronaphthalene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 91-58-7
2-Chlorophenol ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 95-57-8
4-Chlorophenylphenyl ether ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 7005-72-3
Chrysene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 218-01-9
Dibenz(a,h)anthracene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 53-70-3
1,2-Dichlorobenzene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 95-50-1
1,3-Dichlorobenzene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 541-73-1
1,4-Dichlorobenzene ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 106-46-7
3,3'-Dichlorobenzidine ND ug/L 25.0 1 05/15/13 08:30 05/17/13 00:36 91-94-1
2,4-Dichlorophenol ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 120-83-2
Diethylphthalate ND ug/L 5.0 1 05/15/13 08:30 05/17/13 00:36 84-66-2
2,4-Dimethylphenol ND ug/L 10.0 1 05/15/13 08:30 05/17/13 00:36 105-67-9
Date: 05/30/2013 05:11 PM
REPORT OF LABORATORY ANALYSIS
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