NC0069841_Application (ATC)_20240417

UNIONCOUNTY
north carolina
AUTHORIZATION TO CONSTRUCT PERMIT APPLICATION
Crooked Creek Water Reclamation Facility
UV Disinfection Replacement Project
April 16, 2024
Union County Water
Engineering Division
500 North Main Street, Suite 600
Monroe, NC 28112-4730
Grant.Moore(@unioncountync.gov
Prepared By
Hazen and Sawyer
9101 Southern Pine
Charlotte, NC 28273
[phone]
NC License No. C-0381

THIS PAGE INTENTIONALLY LEFT BLANK

H z n Hazen and Sawyer
a e 9101 Southern Pine Boulevard, Suite 250
Charlotte, NC 28273 • 704.357.3150
April 16, 2024
Mr. Ori Tuvia
North Carolina Division of Water Resources
512 North Salisbury Street
9' Floor — Archdale Building
Raleigh, NC, 27604
Re: Union County
Crooked Creek WRF UV Disinfection Replacement Project
NPDES No. NC0069841
Request for Authorization to Construct
Dear Mr. Tuvia:
The enclosed Application for Authorization to Construct Permit (Form ATC-10-23) is for the project
"Crooked Creek WRF UV Disinfection Replacement Project". On behalf of Union County, Hazen and
Sawyer submits this letter and enclosures to request Authorization to Construct this project.
This project proposes to replace the WRF's existing Ultraviolet (UV) Disinfection Facility due to
equipment age and condition. The facility, located in northwestern Union County, will treat Union
County customers in the surrounding area. Construction is scheduled to begin in fall 2024 and is expected
to continue for a duration of 9 months.
The scope of construction work includes:
• New UV Disinfection Facility with associated process piping and manholes.
• Canopy.
• Electrical equipment and ductbanks.
In accordance with the ATC Application, the following are included within the submittal package:
• Application for Authorization to Construct Permit (Form ATC-10-23)
• Engineering plans including civil, process mechanical, structural, electrical, and
instrumentation
• Engineering specifications including civil, process mechanical, structural, electrical, and
0
instrumentation
co
co
• NPDES Permit (NC0069841)
co
• Engineering calculations
0
• USB with digital PDFs of the above items
hazenandsawyer.com

Hazen
Thank you for your consideration of this application. If you have any questions or need any additional
information to complete your review, please do not hesitate to contact me at 704-649-7080 or via email at
[e-mail].
Very truly yours,
41clt4 -P
Michael Parker, PE
Associate Vice President
Cc: Fred Braun (Union County)
Page 2 of 2
hazenandsawyer.com

DWR
Division of Water Resources
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
SECTION 1: INSTRUCTIONS AND INFORMATION
A. The Division of Water Resources will accept this application package for review only if all of the items are provided and the
application is complete. Failure to submit all of the required items will result in the application package being returned as incomplete
per 15A NCAC 02T .0105(b).
B. A check or money order must be submitted in the amount of $1000.00 (except minor modifications) dated within 90 days of
application submittal and made payable to North Carolina Department of Environmental Quality (NCDEQ).
C. Plans and specifications must be prepared in accordance with 15 NCAC 02H. 0100, 15A NCAC 02T, North Carolina General
Statute 133-3, North Carolina General Statute 143-215.11 and Division of Water Resources Minimum Design Criteria for NPDES
Wastewater Treatment Facilities.
D. The plans and specifications submitted must represent a completed final design that is ready to advertise for bid.
E. Any content changes made to this Form ATC 10-23 shall result in the application package being returned.
F. The Applicant shall submit ONE ORIGINAL and ONE DIGITAL COPY (CD) of the application, all supporting documentation
and attachments. All information must be submitted bound or in a 3-ring binder, with a Section tab for each Section, except the
Engineering Plans.
G. Check the boxes below to indicate that the information is provided and the requirements are met.
H. If attachments are necessary for clarity or due to space limitations, such attachments are considered part of the application package
and must be numbered to correspond to the item referenced.
I. For any project that requires review under the State Environmental Policy Act (SEPA), an Authorization to Construct cannot be
issued prior to the completion of a State Clearinghouse advertisement period for a FONSI, EIS, etc. unless the project qualifies for
a Determination of Minor Construction Activity or the funding entity specifies that this requirement does not apply.
J. For more information, visit the Division of Water Resources web site at: hltp://portal.ncdenr.oriz/web/wq/swp//ps/npdes.
K. In addition to this Authorization to Construct, the Applicant should be aware that other permits may be required from other Sections
of the Division of Water Resources (for example: reclaimed water facilities permits; Class A or B biosolids residuals permit).
SECTION 2: APPLICANT INFORMATION AND PROJECT DESCRIPTION
A. APPLICANT
Applicant's name
Union County Water
Signature authority's name per 15A NCAC 02T .0106(b)
Thomas Mann
Signature authority's title
CIP Program Manager
Complete mailing address
500 North Main Street, Suite 600, Monroe, NC 28112-4730
Telephone number
704-292-2560
Email address
[e-mail]
B. PROFESSIONAL ENGINEER
Professional Engineer's name
Michael Parker
Professional Engineer's title
Associate Vice President
North Carolina Professional Engineer's License No.
026432
Firm name
Hazen and Sawyer
Firm License number
C-0381
Complete mailing address
9101 Southern Pine Blvd, Suite 250, Charlotte, NC 28273
Telephone number
704-649-7080
Email address
[e-mail]
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 1

DWR
Division of Water Resources
C. NPDES PERMIT
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
NPDES Permit number
NCO069841
Current Permitted flow (MGD) — include permit
1.9 MGD
flow phases if applicable
D. PROJECT DESCRIPTION
Provide a brief description of the project: The project includes a new Ultraviolet Disinfection Facility to replace the existing
UV Disinfection Facility due to concerns with equipment age and condition. The Crooked Creek WRF is located in Monroe, NC
in northwestern Union Co1m , along the Crooked Creek.
SECTION 3: APPLICATION ITEMS REQUIRED FOR SUBMITTAL FOR ALL PROJECTS
A. Cover Letter
® The letter must include a request for the Authorization to Construct; the facility NPDES Number; a brief project description
that indicates whether the project is a new facility, facility modification, treatment process modification, or facility expansion;
the construction timeline; and a list of all items and attachments included in the application package.
❑ If any of the requirements of 15 NCAC 02H. 0100, 15A NCAC 02T, North Carolina General Statute 133-31 North Carolina
General Statute 143-215.1, and Division of Water Resources Minimum Design Criteria for NPDES Wastewater Treatment
Facilities are not met by the proposed design, the letter must include an itemized list of the requirements that are not met.
❑ If the project is funded by American Rescue Plan Act (ARPA) funds, please include the ARPA project number in the cover
letter and here
B. NPDES Permit
® Submit Part I of the Final NPDES permit for this facility that includes Part A (Effluent Limitations and Monitoring
Requirements) for the monthly average flow limit that corresponds to the work that is requested for this project.
C. Special Order by Consent
❑ If the facility is subject to any Special Orders by Consent (SOC), submit the applicable SOC.
® Not Applicable.
D. Finding of No Significant Impact or Record of Decision
❑ Submit a copy of the Finding of No Significant Impact or Record of Decision for this project.
❑ Provide a brief description of any of the mitigating factors or activities included in the approved Environmental Document
that impact any aspect of design of this project, if not specified in the Finding of No Significant Impact or Record of
Decision.
Z Not Applicable.
E. Engineering Plans
® Per 15A NCAC 02T .0504(c)(1), submit one set of detailed plans that have been signed, sealed and dated by a North Carolina
Licensed Professional Engineer.
® Per 21 NCAC 56 .1103(a)(6), the name, address and License number of the Licensee's firm shall be included on each sheet of
the engineering drawings.
® Plans must be labeled as follows: FINAL DRAWING — FOR REVIEW PURPOSES ONLY — NOT RELEASED FOR
CONSTRUCTION.
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 2

State of North Carolina
DWR
Department of Environmental Quality
Division of Water Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
® 15A NCAC 02H .0124 requires multiple (dual at a minimum) components such as pumps, chemical feed systems, aeration
equipment and disinfection equipment. Is this requirement met by the design? ® Yes or ❑ No. If no, provide an explanation:
Plans shall include:
® Plans for all applicable disciplines needed for bidding and construction of the proposed project (check as appropriate):
® Civil ❑ Not Applicable
® Process Mechanical ❑ Not Applicable
® Structural ❑ Not Applicable
® Electrical ❑ Not Applicable
® Instrumentation/Controls ❑ Not Applicable
❑ Architectural ® Not Applicable
❑ Building Mechanical ® Not Applicable
❑ Building Plumbing ® Not Applicable
® Plan and profile views and associated details of all modified treatment units including piping, valves, and equipment (pumps,
blowers, mixers, diffusers, etc.)
® Are any modifications proposed that impact the hydraulic profile of the treatment facility? ® Yes or ❑ No. If yes, provide a
hydraulic profile drawing on one sheet that includes all impacted upstream and downstream units. The profile shall include
the top of wall elevations of each impacted treatment unit and the water surface elevations within each impacted treatment unit
for two flow conditions: (1) the NPDES permitted flow with all trains in service and (2) the peak hourly flow with one treatment
train removed from service.
❑ Are any modifications proposed that impact the process flow diagram or process flow schematic of the treatment facility? ❑
Yes or ® No. If yes, provide the process flow diagram or process flow schematic showing all modified flow paths including
aeration, recycle/return, wasting, and chemical feed, with the location of all monitoring and control instruments noted.
F. ® Engineering Specifications
® Per 15A NCAC 02T .0504(c)(2), submit one set of specifications that have been signed, sealed and dated by a North Carolina
Licensed Professional Engineer.
® Specifications must be labeled as follows: FINAL SPECIFICATIONS — FOR REVIEW PURPOSES ONLY — NOT
RELEASED FOR CONSTRUCTION.
Specifications shall include:
® Specifications for all applicable disciplines needed forbidding and construction of the proposed project (check as appropriate):
® Civil ❑ Not Applicable
® Process Mechanical ❑ Not Applicable
® Structural
❑ Not Applicable
® Electrical
❑ Not Applicable
® Instrumentation/Controls
❑ Not Applicable
❑ Architectural
® Not Applicable
❑ Building Mechanical
® Not Applicable
❑ Building Plumbing
® Not Applicable
® Detailed specifications for all treatment units and processes including piping, valves, equipment (pumps, blowers, mixers,
diffusers, etc.), and instrumentation.
® Means of ensuring quality and integrity of the finished product including leakage testing requirements for structures and
pipelines, and performance testing requirements for equipment.
® Bid Form for publicly bid projects.
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 3

DWR
Division of Water Resources
G. Construction Sequence Plan
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
® Construction Sequence Plan such that construction activities will not result in overflows or bypasses to waters of the State. The
Plan must not imply that the Contractor is responsible for operation of treatment facilities. List the location of the Construction
Sequence Plan as in the Engineering Plans or in the Engineering Specifications or in both: Construction sequence is included
in Specification Section 01 14 00 Subsection 1.06.
H. Engineering Calculations
® Per 15A NCAC 02T .0504(c)(3), submit one set of engineering calculations that have been signed, sealed and dated by a North
Carolina Licensed Professional Engineer; the seal, signature and date shall be placed on the cover sheet of the calculations.
For new or expanding facilities and for treatment process modifications that are included in Section 4.C, the calculations
shall include at a minimum:
❑ Demonstration of how peak hour design flow was determined with a justification of the selected peaking factor.
❑ Influent pollutant loading demonstrating how the design influent characteristics in Section 4.13.2 of this form were determined.
❑ Pollutant loading for each treatment unit demonstrating how the design effluent concentrations in Section 4.13.2 of this form
were determined.
® Hydraulic loading for each treatment unit.
® Sizing criteria for each treatment unit and associated equipment (blowers, mixers, pumps, etc.)
❑ Total dynamic head (TDH) calculations and system curve analysis for each pump specified that is included in Section 4.C.6.
® Buoyancy calculations for all below grade structures.
❑ Supporting documentation that the specified auxiliary power source is capable of powering all essential treatment units.
I. Permits
❑ Provide the following information for each permit and/or certification required for this project:
Permit/Certification
Not
Applicable
Date
Submitted
Date
Approved
Permit/
Certification
Number
If Not Issued Provide
Status and Expected
Issuance Date
Dam Safety
3/21/24
Soil Erosion and Sediment Control
3/21/24
USCOE / Section 404 Permit
3/21/24
Water Quality Certification (401)
3/21/24
USCOE / Section 10
3/21/24
Stormwater Management Plan
3/21/24
CAMA
3/21/24
NCDOT Encroachment Agreement
3/21/24
Railroad Encroachment Agreement
3/21/24
Other:
3/21/24
J. Residuals Management Plan
❑ For all new facilities, expanding facilities, or modifications that result in a change to sludge production and/or sludge processes,
provide a Residuals Management Plan meeting the requirements of 15A NCAC 02T .0504(i) and .0508; the Plan must include:
❑ A detailed explanation as to how the generated residuals (including trash, sediment and grit) will be collected, handled,
processed, stored, treated, and disposed.
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 4

State of North Carolina
DWR
Department of Environmental Quality
Division of Water Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
❑ An evaluation of the treatment facility's residuals storage requirements based upon the maximum anticipated residuals
production rate and ability to remove residuals.
❑ A permit for residuals utilization or a written commitment to the Applicant from a Permittee of a Department approved
residuals disposal/utilization program that has adequate permitted capacity to accept the residuals or has submitted a
residuals/utilization program application.
❑ If oil, grease, grit or screenings removal and collection is a designated unit process, a detailed explanation as to how the
oil/grease will be collected, handled, processed, stored and disposed.
® Not Applicable.
SECTION 4: PROJECT INFORMATION
A. WASTEWATER TREATMENT PLANT FLOW INFORMATION — COMPLETE FOR NEW OR
EXPANDING FACILITIES
1. Provide the following flow information:
Plant Flows
Existing Plant Design
1.9 MGD
Current NPDES Permit Limit
1.9 MGD
Current Annual Average
(past 12 months)
1.1 MGD
For Past 12 Months:
Start Date: 02/2023
End Date: 02/2024
For Past 24 Months:
Start Date: 02/2022
End Date: 02/2024
Maximum Month
1.2 MGD
1.2 MGD
Maximum Day
2.26 MGD
2.30 MGD
Peak Hour
NOT AVAILABLE MGD
NOT AVAILABLE MGD
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 5

DWR
Division of Water Resources
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
B. WASTEWATER TREATMENT FACILITY DESIGN INFORMATION — COMPLETE FOR NEW OR
EXPANDING FACILITIES AND FOR TREATMENT PROCESS MODIFICATIONS
1. Have all of the requirements of 15 NCAC 02H. 0100, 15A NCAC 02T, North Carolina General Statute 133-3, North
Carolina General Statute 143-215.11 and Division of Water Resources Minimum Design Criteria for NPDES Wastewater
Treatment Facilities been met by the proposed design and specifications? ® Yes or ❑ No. If no, provide justification as to
why the requirements are not met, consistent with 15A NCAC 02T .0105(n):
2. Provide the design influent and effluent characteristics that are used as the basis for the project design, and the NPDES
permit limits for the following parameters:
Project Basis of Design
Influent
Design Influent
Design Influent
Concentration
Concentration
Load
- Current
(Must be
(Must be
Annual
supported by
supported by
Design Effluent
Average (past
Engineering
Engineering
Concentration and/or
NPDES Permit Limits
12 months) if
Calculations
Calculations
Load
(monthly average)
Parameter
Available
[Section 3.111
[Section 3.111
Ammonia Nitrogen
N/A mg/L Summer
2.0 mg/L Summer
��
`NH3-N)
N/A mg/L
N/A mg/L
N/A lb/day
N/A mg/L Winter
4.0 mg/L Winter
Biochemical
N/A mg/L Summer
5.0 mg/L Summer
Oxygen Demand
N/A mg/L
N/A mg/L
N/A lb/day
(BOD5)
N/A mg/L Winter
10.0 mg/L Winter
Fecal Coliform
< 200 per 100 mL
200 per 100 mL
Nitrate + Nitrite
Nitrogen (NO3-N +
N/A mg/L
N/A mg/L
NO2-N
Total Kjeldahl
N/A mg/L
Nitrogen
N/A mg/L
N/A mg/L
Total Nitrogen
N/A lb/year
N/A lb/year
N/A mg/L
N/A mg/L
Total Phosphorus
N/A mg/L
N/A mg/L
N/A lb/day
N/A lb/year
N/A lb/year
Total Suspended
Solids (TSS)
2.57 mg/L
250 mg/L
4,000 lb/day
5 mg/L
30 mg/L
3. Based on the "Project Basis of Design" parameters listed above, will the proposed design allow the treatment facility to meet
the NPDES Permit Limits listed above? ® Yes or ❑ No. If no, describe how and why the Permit Limits will not be met: _
4. Per 15A NCAC 02T .0505(i), by-pass and overflow lines are prohibited. Is this condition met by the design? ® Yes or ❑
No If no, describe the treatment units bypassed, why this is necessary, and where the bypass discharges: _
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 6

DWR
Division of Water Resources
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
5. Per 15A NCAC 02T .0505(k), multiple pumps shall be provided wherever pumps are used. Is this condition met by the
design? ® Yes or ❑ No. If no, provide an explanation: _
6. Per 15A NCAC 02T .0505(1), power reliability shall be provided consisting of automatically activated standby power supply
onsite capable of powering all essential treatment units under design conditions, or dual power supply shall be provided per
15A NCAC 02H. 0124(2)(a). Is this condition met by the design? ® Yes or ❑ No. If no, provide (as an attachment to
this Application) written approval from the Director that the facility:
➢ Has a private water supply that automatically shuts off during power failures and does not contain elevated water storage
tanks, and
➢ Has sufficient storage capacity that no potential for overflow exists, and
➢ Can tolerate septic wastewater due to prolonged detention.
7. Per 15A NCAC 02T .0505(o), a minimum of 30 days of residual storage shall be provided. Is this condition met by the
design? ® Yes or ❑ No. If no, explain the alternative design criteria proposed for this project in accordance 15A NCAC
02T .105(n):
8. Per 15A NCAC 02T .0505(g), the public shall be prohibited from access to the wastewater treatment facilities. Explain how
the design complies with this requirement: A site security fence and gate are installed at the WRF.
9. Is the treatment facility located within the 100-year flood plain? ❑ Yes or ® No. If yes, describe how the facility is
protected from the 100-year flood:
C. WASTEWATER TREATMENT UNIT AND MECHANICAL EQUIPMENT INFORMATION — COMPLETE
FOR NEW OR EXPANDING FACILITIES AND FOR MODIFIED TREATMENT UNITS
PRELIMINARY AND PRIMARY TREATMENT (i.e., vhvsical removal overations and flow equalization):
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
:L
Size per Unit
Reference
Reference
Provided.
(Yes or No)
Manual Bar Screen
MGD at peak hourly flow
Mechanical Bar
MGD at peak hourly flow
Screen
Grit Removal
MGD at peak hourly
flow
Flow Equalization
--
gallons
Primary Clarifier
Circular
ft diameter; ft side
water depth
Primary Clarifier
Rectangular
square feet; ft side
water depth
Other
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 7

DWR
Division of Water Resources
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
2. SECONDARY TREATMENT (BIOLOGICAL REACTORS AND CLARIFIERS) (i.e., biological and chemical
processes to remove or 3,anics and nutrients
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided.
(Yes or No)
Aerobic Zones/
gallons
Tanks
Anoxic Zones/
gallons
Tanks
Anaerobic
gallons
Zones/Tanks
Sequencing Batch
--
gallons
Reactor SBR
Membrane
gallons
Bioreactor MBR
Secondary
Circular
ft diameter; ft
Clarifier
side water depth
Secondary
Rectangular
square feet; ft
Clarifier
side water depth
Other
TERTIARY TREATMENT
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided.
(Yes or No)
Tertiary Clarifier
Circular
ft diameter; ft
side water depth
Tertiary Clarifier
Rectangular
square feet; ft
side water depth
Tertiary Filter
square feet
Tertiary Membrane
square feet
Filtration
Post -Treatment
gallons
Flow Equalization
Post -Aeration
gallons
Other
4. DISINFECTION
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided.
(Yes or No)
In series
2,500,000 gal/day per bank at
Ultraviolet Light
3
(Parallel; in
peak hourly flow; 2 duty, 1
M101
46 66 00
Yes
series)
standby number of banks; 8
number of lamps/bank
Chlorination
(Gas;
gallons of contact
tablet; liquid)
tank/unit
Dechlorination
(Gas;
gallons of contact
tablet; liquid)
tank/unit
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 8

DWR
Division of Water Resources
5. RESIDUALS TREATMENT
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided.
Yes or No
Gravity Thickening
square feet; ft side
Tank
water depth
Mechanical
Thickening/
dry lb/hour
Dewaterin
Aerobic Digestion
gallons
Anaerobic
gallons
Digestion
Composting
dry lb/hour
Drying
dry lb/hour
Other
6. PUMP SYSTEMS (include influent, intermediate, effluent, major recycles, waste sludge, thickened waste sludge and plant
drain DumDS)
Location
No. of
Pumps
Purpose
Type
Capacity
of each
pump
Plan Sheet
Reference
Specification
Reference
GPM
TDH
7. MIXERS
Location
No. of
Mixers
Purpose
Type
Power of
eac(hHP xer
Plan Sheet
Reference
Specification
Reference
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 9

DWR
Division of Water Resources
8. BLOWERS
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
Location
No. of
Blowers
Purpose
Type
Capacity of
each Blower
Plan Sheet
Reference
Specification
Reference
9. ODOR CONTROL
Location
No. of
Units
Purpose
Type
Plan Sheet
Reference
Specification
Reference
D. SETBACKS — COMPLETE FOR NEW WASTEWATER TREATMENT STRUCTURES
1. The minimum distance for each setback parameter to the wastewater treatment/storage units per 15A NCAC 02T .0506(b) are
as follows:
Minimum Distance
Is Minimum Distance
Required from Nearest
Requirement met by the
Setback Parameter
Treatment/Storage
Design. If "No", identify
Unit
Setback Waivers in Item D.2
Below
Any habitable residence or place of assembly under separate
100 ft
® Yes
❑ No
ownership or not to be maintained as part of the project site
Any private or public water supply source
100 ft
® Yes
❑ No
Surface waters (streams — intermittent and perennial, perennial
50 ft
® Yes
❑ No
waterbodies, and wetlands
Any well with exception of monitoring wells
100 ft
® Yes
❑ No
Any property line
50 ft
® Yes
❑ No
2. Have any setback waivers been obtained per 15A NCAC 02T .0506(d)? ❑ Yes or ® No. If yes, have these waivers been
written, notarized and signed by all parties involved and recorded with the County Register of Deeds? ❑ Yes or ❑ No. If no,
provide an explanation:
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 10

State of North Carolina
DWR
Department of Environmental Quality
Division of Water Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
SECTION 5: APPLICATION CERTIFICATION BY PROFESSIONAL ENGINEER
Professional Engineer's Certification per 15A NCAC 02T .0105:
I, Michael Parker , attest that this application package for an Authorization to Construct
(Typed Name of Professional Engineer)
for the Crooked Creek WRF UV Disinfection Replacement Project
(Facility and Project Name)
was prepared under my direct supervisory control and to the best of my knowledge is accurate, complete and consistent
with the information supplied in the engineering plans, specifications, calculations, and all other supporting
documentation for this project. I further attest that to the best of my knowledge the proposed design has been prepared in
accordance with all applicable regulations and statutes, 15 NCAC 02H. 0100, 15A NCAC 02T, North Carolina General
Statute 133-3, North Carolina General Statute 143-215.1, and Division of Water Resources Minimum Design Criteria for
NPDES Wastewater Treatment Facilities, and this Authorization to Construct Permit Application, except as provided for
and explained in Section 4.13.1 of this Application. I understand that the Division of Water Resources' issuance of the
Authorization to Construct Permit may be based solely upon this Certification and that the Division may waive the
technical review of the plans, specifications, calculations and other supporting documentation provided in this application
package. I further understand that the application package may be subject to a future audit by the Division. Although
certain portions of this submittal package may have been prepared, signed and sealed by other professionals licensed in
North Carolina, inclusion of these materials under my signature and seal signifies that I have reviewed the materials and
have determined that the materials are consistent with the project design.
I understand that in accordance with General Statutes 143-215.6A and 143-215.6B, any person who knowingly makes any
false statement, representation, or certification in any application package shall be guilty of a Class 2 misdemeanor, which
may include a fine not to exceed $10,000, as well as civil penalties up to $25,000 per violation.
North Carolina Professional Engineer's seal with written signature placed over or adjacent to the seal and dated:
CARQ
F743 (, .
4/16/2024
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 11

DW-R
State of North Carolina
Department of Environmental Quality
Division of Water Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
Forlit-11u rv_r jtil&*
SECTION 6: APPLICATION CERTIFICATION BY APPLICANT
Applicant's Certification per 15A NCAC 02T .0106(b):
I, Thomas Mann , attest that this application package for an Authorization to Construct
(Typed Name of Signature Authority and Title)
for the _Crooked Creek WRF UV Disinfection Replacement Project
(Facility and Project Name)
has been reviewed by me and is accurate and complete to the best of my knowledge. I also understand that if all required
parts of this application package are not completed and that if all required supporting information and attachments are not
included, this application package will be returned to me as incomplete. I further certify that in accordance with 15A
NCAC 02T .0120(b), the Applicant or any affiliate has not been convicted of environmental crimes, has not abandoned a
wastewater facility without proper closure, does not have an outstanding civil penalty where all appeals have been
abandoned or exhausted, are compliant with any active compliance schedule, and does not have any overdue annual fees.
I understand that the Division of Water Resources' issuance of the Authorization to Construct Permit may be based solely
upon acceptance of the Licensed Professional Engineer's Certification contained in Section 5, and that the Division may
waive the technical review of the plans, specifications, calculations and other supporting documentation provided in this
application package. I further understand that the application package may be subject to a future audit.
I understand that in accordance with General Statutes 143-215.6A and 143-215.6B any person who knowingly makes any
false statement, representation, or certification in any application package shall be guilty of a Class 2 misdemeanor, which
may include a kfine/n,�ot to excceeed$10,000, as well as civil penalties up to $25,000 per violation.
Signature: db+�'YVt�lr Date: I - I-[ - Z`i
THE COMPLETED APPLICATION AND SUPPORTING INFORMATION SHALL BE SUBMITTED
TO:
NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES/NPDES
By U.S. Postal Service By Courier/Special Delivery:
1617 MAIL SERVICE CENTER 512 N. SALISBURY STREET, 9TH FLOOR
RALEIGH, NORTH CAROLINA 27699-1617 RALEIGH, NORTH CAROLINA 27604
TELEPHONE NUMBER: [phone]
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 12

ATTACHMENT 3B
NPDES PERMIT

Water Resources
Environmental Quality
June 18, 2018
Andrew Neff, P.E.
Water and Wastewater Division Director
Union County Department of Public Works
4600 Goldmine Road
Monroe, NC 28110
Dear Mr. Neff:
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Interim Director
Subject: Final NPDES Permit Renewal
Permit NCO069841
Crooked Creek WWTP #2, Class 3
Union County
SIC Code 4952
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007
(or as subsequently amended).
Please note that the receiving stream is listed as impaired for Benthos (freshwater benthic aquatic
life) on the North Carolina 2014 303(d) Impaired Waters List. Addressing impaired waters is a
high priority with the Division, and instream data will continue to be evaluated. If there is
noncompliance with permitted effluent limits and stream impairment can be attributed to your
facility, then mitigative measures may be required.
No changes were made to the permit since the draft was sent to you on December 14, 2017.
The final permit maintains the following significant changes identified in the letter sent on
December 14, 2017:
• Instream monitoring for Conductivity has been removed based on State guidance provided
on April 22, 2002, that recommends removal from all 100% domestic wastewater permits.
Your facility treats 100% domestic wastewater according to your permit application.
Limits for Ammonia -Nitrogen (NH3-N) have been reduced based on a wasteload allocation
calculation using EPA criteria and State guidance provided on July 22, 2016. Changes are
tabulated below:
^--'Nothing Compares -,�
State of North Carolina I Environmental Quality
1611 Mail Service Center I Raleigh, North Carolina 27699-1611
919-707-9000

Interim Limitations
Final Limitations
Summer
Winter
Summer
Winter
Monthly Average
2.0 mg/L
4.0 mg/L
1.0 mg/L
1.9 mg/L
Weekly Average
6.0 mg/L
12.0 mg/L
3.0 mg/L
5.7 mg/L
To allow time and actions toward meeting the new NH3-N limits, a 4-year compliance
schedule has been added to the permit with annual milestones. [See Section A. (5.).]
• Section A. (L) Effluent Limitations and Monitoring Requirements sheet was split into
separate Interim and Final limitations and monitoring requirements sheets [as Sections A.
(1.) and A. (2.), respectively] to address the reduced NH3-N limits and 4-year compliance
schedule. The interim sheet contains existing NH3-N limits to be in effect until completion
of the compliance schedule, by January 31, 2022. The final sheet contains NH3-N limits
effective at completion of the compliance schedule, lasting through permit expiration.
• The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by the
NC Environmental Management Committee (EMC) on November 13, 2014. The US EPA
subsequently approved the WQS revisions on April 6, 2016 with some exceptions. The NC
Division of Water Resources NPDES Permitting Unit is required to implement the new
dissolved metal standards in all permits public noticed after April 6, 2016. The new
standards for most metals include acute standards. Further, the freshwater standards for
several metals are expressed as the dissolved form of the metals, and seven metals have
hardness -dependent equations. As a result, the NPDES Permitting Unit will need site -
specific effluent hardness data and instream hardness data, if the receiving stream has a
positive 7Q10s, upstream of the discharge, for each facility monitoring these metals in
order to calculate permit limitations. Effluent hardness sampling has been added to this
permit at a quarterly monitoring frequency. [See Sections A. (L) and A. (2.) Effluent
Limitations and Monitoring Requirements.]
• Monitoring for Total Copper has been removed from the permit, based on results of a
reasonable potential analysis. No reasonable potential to exceed the water quality standard
was found, and the predicted maximum concentration was found to be less than 50% of its
allowable concentration.
• Review of submitted effluent data found seven non -detects of Total Silver (two at < 10
µg/L and five at < 5 µg/L). In accordance with 15A NCAC 2B .0500, all test procedures
must produce detection and reporting levels that are below the permit discharge
requirements and all data generated must be reported to the approved detection level or
lower reporting level of the procedure. Currently, DWR's laboratory identifies the PQL for
Total Silver at < 1 µg/L. The allowable discharge concentration for your facility is 0.06
µg/L Total Silver. The Division recommends that the Permittee improves and implements
"clean" sampling techniques, and analyzes Total Silver to the lower reporting level of the
procedure. Quarterly monitoring for Total Silver has been added to the permit.
Page 2 of 4

• Monthly monitoring of Total Zinc has been removed from the permit. A review of effluent
data found no reasonable potential to exceed water quality standards, and the predicted
maximum concentration was found to be less than 50% of its allowable concentration.
• Frequency of the Effluent Pollutant Scans have been reduced from annually to three years
within the permit term per 40 CFR 122. Effluent Pollutant Scans shall be sampled in years
2019, 2020 and 2021. [See Section A. (4.).]
Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs) and program reports. The requirement to continue reporting discharge monitoring
data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR)
internet application has been added to your NPDES permit. [See Section A. (6.).]
For information on eDMR, registering for eDMR and obtaining an eDMR user account,
please visit the following web page: http://deg.nc.gov/about/divisions/water-
resources/edmr.
For more information on EPA's final NPDES Electronic Reporting Rule, please visit the
following web site: https://www.federalregister.gov/documents/2015/10/22/2015-
24954/national-pollutant-discharge-elimination-system-npdes-electronic-reporting-rule.
Please note, in accordance with 15A NCAC 0213.0500, all test procedures must produce detection
and reporting levels below the permit discharge limits, and all data must be reported to the
approved detection level or lower reporting level of the procedure. Currently, the Division's
laboratory identifies the PQLs for Arsenic at 2 µg/L, Cadmium at 0.50 µg/L, Lead at 2 µg/L, and
Selenium at 1 µg/L, plus PQLs for several other parameters. Recommended PQLs for all toxicants
can be found at:
https:Hfiles nc pov/ncdeg/Water%20Quality/Chemistry%2OLab/Op erations/Microbiology%20an
d%201norganic%2OChemistry%2OBranch/POLInorganics2016O829-WebSite.-DdfI
Effluent Pollutant Scans shall test and report down to the lowest reporting level as well.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within
thirty (30) days following receipt of this letter. This request must be in the form of a written
petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-
6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect
the legal requirements to obtain other permits which may be required by the Division of Water
Resources or any other Federal, State, or Local governmental permits that may be required.
Page 3 of 4

If you have any questions concerning this permit, please contact Gary Perlmutter at (919) 807-
6385 or via email at [e-mail].
Sincerely,
inda Culpe e
Interim Director, Division of Water Resources,
NCDEQ
Hardcopy: NPDES Files
Central Files
DWR / Mooresville Regional Office / Water Quality Operations
E-copy: US EPA Region 4
DWR / Operator Certification Unit / Maureen Kinney
DWR / Aquatic Toxicology Branch / Susan Meadows
DWR / WSS / Ecosystems Branch / Mark Vander Bourgh
Page 4 of 4

Permit NCO069841
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended, the
Union County
is hereby authorized to discharge wastewater from a facility located at the
Crooked Creek WWTP #2
4015 Sardis Church Road
Monroe, NC 28110
Union County
to receiving waters designated as North Fork Crooked Creek in the Yadkin Pee -Dee River Basin in
accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
Il, III and IV hereof.
This permit shall become effective August 1, 2018.
This permit and authorization to discharge shall expire at midnight on October 31, 2022.
Signed this day June 18, 2018.
Culp er, erim Director
toda
ision of Water Resources
By Authority of the Environmental Management Commission

Permit NC0069841
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.
Union County is hereby authorized to:
1. Continue to operate an existing 1.9 MGD wastewater treatment system consisting of the following:
♦ Influent pump station with six pumps
♦ Mechanical bar screen
♦ Manual bar screen (back-up)
♦ Two oxidation ditches with six brush aerators
♦ Four secondary clarifiers
♦ Return and waste activated sludge pumping station
♦ Six tertiary sand filters
♦ UV disinfection system
♦ Two chlorine contact basins (optional)
♦ Dechlorination vault (optional)
♦ Cascade aeration
♦ Effluent pump station with three pumps
♦ Five aerobic digesters with 2.0 MG total capacity
♦ Standby generator
The facility is located at the Crooked Creek Wastewater Treatment Plant #2, 4015 Sardis Church
Road, Monroe, in Union County;
2. Discharge from said treatment works at the location specified on the attached map into North Fork
Crooked Creek which is classified C waters in the Yadkin -Pee Dee River Basin.
Page 2of14

Permit NCO069841
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (1.9 MGD,
Interim Ammonia-N Limitations) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
a. During the period beginning on the effective date and lasting until January 31, 2022, the Permittee
is authorized to discharge treated domestic wastewater from Outfall 001. Such discharges shall be
limited and monitored' by the Permittee as specified below:
LIMITS
MONITORING REQUIREMENTS
EFFLUENT
CHARACTERISTICS
Monthly
Weekly
Daily
Measurement
Sample
Sample Location 2
Average
Average
Maximum
Frequency
Type
Flow
1.9 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 200C (Summer:
5.0 m /L
g
7.5 m /L
g
3 / Week
Composite
p
Influent and Effluent
April 1 through October 31) 3
BOD, 5-day, 200C (Winter:
10.0 mglL
15.0 mglL
3 /Week
Composite
Influent and Effluent
November 1 through March 31) 3
Total Suspended Solids (TSS) 3
30.0 mg/L
45.0 mg/L
3 / Week
Composite
Influent and Effluent
NH3 as N (Summer: April 1
2.0 m /L
g
6.0 m /L
g
3 / Week
Composite
p
Effluent
through October 31) 4
NH3 as N (Winter: November 1
4.0 m /L
g
12.0 m IL
g
3 /Week
Composite
p
Effluent
through March 31) ^
Dissolved Oxygen (DO)
Daily Average >_ 6.0 mg/L
3 / Week
Grab
Effluent
Fecal Coliform (geometric mean)
200/100 mL
400/100 mL
3 / Week
Grab
Effluent
Total Residual Chlorine (TRC) 5
17 µg/L
28 µg/L
3 / Week
Grab
Effluent
pH
Between 6.0 and 9.0 Standard Units
3 / Week
Grab
Effluent
Temperature (°C)
Monitor and Report
Daily
Grab
Effluent
Total Nitrogen (mg/L) 6
Monitor and Report
Monthly
Calculated
Effluent
Total Phosphorus (mg/L)
Monitor and Report
Monthly
Composite
Effluent
Total Hardness as [CaCO3 or
Monitor and Report
Quarterly
Composite
Effluent
(Ca + Mg)] (mg/L) I
Total Silver (µg/L) 6
Monitor and Report
Quarterly
Composite
Effluent
Chronic Toxicity
Ceriodaphnia Pass/Fail at 90% Effluent
Quarterly
Composite
Effluent
Effluent Pollutant Scan
Monitor and Report
Footnote 10
Footnote 10
Effluent
Temperature (°C) 2
Variable 2
Grab
Upstream,
Downstream
Dissolved Oxygen (mg/L) 2
Variable 2
Grab
Upstream,
Downstream
Fecal Coliform (#/100 ml-) 2
Variable
Grab
Upstream,
Downstream
All footnotes are listed on the following page.
Page 3 of 14

Permit NC0069841
Footnotes*
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Section A (6.).
2. Upstream is at 50 feet from the outfall; downstream is % mile below discharge and at SR 1514.
Upstream and Downstream samples shall be grab samples. Instream samples shall be collected three
times per week from June 1 through September 30 and once per week from October 1 through May
31. Instream monitoring is provisionally waived in light of the Permittee's participation in the
Yadkin -Pee Dee River Basin Association. Instream monitoring will be immediately reinstated should
the permittee end its participation in the Association.
3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective
influent value (85% removal).
4. The facility shall follow the compliance schedule detailed in Section A. (5.) in order to achieve
compliance with final ammonia -nitrogen limits by January 31, 2022. See Section A. (2.).
5. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider
all effluent total TRC values reported below 50 µg/L 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/L.
6. Total Nitrogen = TKN + NO3-N + NO2-N, where TKN is Total Kjeldahl Nitrogen, NO3-N is Nitrate
Nitrogen, and NO2-N is Nitrite Nitrogen.
7. Effluent Total Hardness sampling should be performed in conjunction with testing for hardness -
dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
8. Total Silver shall be reported to the lower reporting level of the procedure.
9. Whole Effluent Toxicity samples shall be taken in February, May, August and November. See
Section A. (3.).
10. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit. See Section
A. (4.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts
Page 4of14

Permit NCO069841
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (1.9 MGD, Final
Ammonia-N Limitations) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
a. Effective January 31, 2022 and lasting through expiration, the Permittee is authorized to discharge
treated domestic wastewater from Outfall 001. Such discharges shall be limited and monitored,
by the Permittee as specified below:
LIMITS
MONITORING REQUIREMENTS
EFFLUENT
CHARACTERISTICS
Monthly
Weekly
Daily
Measurement
Sample
Sample Location 2
Average
Average
Maximum
Frequency
Type
Flow
1.9 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C (Summer:
5.0 m /L
g
7.5 m /L
g
3 / Week
Composite
p
Influent and Effluent
April 1 through October 31) 3
BOD, 5-day, 20°C (Winter:
10.0 mglL
15.0 mglL
3 /Week
Composite
Influent and Effluent
November 1 through March 31) 3
Total Suspended Solids (TSS) 3
30.0 mg/L
45.0 mg/L
3 / Week
Composite
Influent and Effluent
NH3 as N (Summer: April 1
1.0 mg/L
3.0 mg/L
3 / Week
Composite
Effluent
through October 31)
NH3 as N (Winter: November 1
1.9 mg/L
5.7 mg/L
3 / Week
Composite
Effluent
through March 31)
Dissolved Oxygen (DO)
Daily Average >_ 6.0 mg/L
3 / Week
Grab
Effluent
Fecal Coliform (geometric mean)
200/100 mL
400/100 mL
3 / Week
Grab
Effluent
Total Residual Chlorine (TRC) ^
17 µg/L 1
28 µg/L
3 / Week
Grab
Effluent
pH
Between 6.0 and 9.0 Standard Units
3 / Week
Grab
Effluent
Temperature (°C)
Monitor and Report
Daily
Grab
Effluent
Total Nitrogen (mg/L) 5
Monitor and Report
Monthly
Calculated
Effluent
Total Phosphorus (mg/L)
Monitor and Report
Monthly
Composite
Effluent
Total Hardness as [CaCO3or
Monitor and Report
Quarterly
Composite
Effluent
(Ca + Mg)](mg/L) 6
Total Silver (µg/L) 7
Monitor and Report
Quarterly
Composite
Effluent
Chronic Toxicity 9
Ceriodaphnia Pass/Fail at 90% Effluent
Quarterly
Composite
Effluent
Effluent Pollutant Scan
Monitor and Report
Footnote 9
Footnote 9
Effluent
Temperature (°C) 2
Variable 2
Grab
Upstream,
Downstream
Dissolved Oxygen (mg/L) 2
Variable 2
Grab
Upstream,
Downstream
Fecal Coliform (#/100 mL) 2
Variable 2
Grab
Upstream,
Downstream
All footnotes are listed on the following page.
Page 5 of 14

Permit NC0069841
Footnotes:
1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system. See
Section A (5.).
2. Upstream is at 50 feet from the outfall; downstream is '/ mile below discharge and at SR 1514.
Upstream and Downstream samples shall be grab samples. Instream samples shall be collected three
times per week from June 1 through September 30 and once per week from October 1 through May
31. Instream monitoring is provisionally waived in light of the Permittee's participation in the
Yadkin -Pee Dee River Basin Association. Instream monitoring will be immediately reinstated should
the permittee end its participation in the Association.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed
15% of the respective influent value (85% removal).
4. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider
all effluent total TRC values reported below 50 µg/L 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/L.
5. Total Nitrogen = TKN + NO3-N + NO2-N, where TKN is Total Kjeldahl Nitrogen, NO3-N is Nitrate
Nitrogen, and NO2-N is Nitrite Nitrogen.
6. Effluent Total Hardness sampling should be performed in conjunction with testing for hardness -
dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
7. Total Silver shall be reported to the lower reporting level of the procedure.
8. Whole Effluent Toxicity samples shall be taken in February, May, August and November. See
Section A. (3.).
9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit. See Section
A. (4.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts
Page 6of14

Permit NCO069841
A. (3.) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) [15A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 90%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or
subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised- December 2010) or subsequent versions. The tests will be performed during the months of
February, May, August and November. These months signify the first month of each three-month toxicity
testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge
below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or Chronic
Value (ChV) below the permit limit, then multiple -concentration testing shall be performed at a
minimum, in each of the two following months as described in "North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter
code TGP313 for the pass/fail results and THP313 for the Chronic Value. Additionally, DWR Form AT-
3 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total Residual Chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the
Water Sciences Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring
will be required during the following month. Assessment of toxicity compliance is based on the toxicity
testing quarter, which is the three-month time interval that begins on the first day of the month in which
toxicity testing is required by this permit and continues until the final day of the third month.
Page 7of14

Permit NC0069841
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later
than the last day of the month following the month of the initial monitoring.
Page 8of14

Permit NCO069841
A. (4.) EFFLUENT POLLUTANT SCAN (Municipal POTWs) [G.S. 143-215.1(b)]
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below.
One scan must be performed in each of the following years: 2019, 2020, and 2021. Analytical methods
shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether
parameters are present in concentrations greater than applicable standards and criteria. Samples should be
collected with one quarterly toxicity test each year, and must represent seasonal variation [i.e., do not
sample in the same quarter every year]. Unless otherwise indicated, metals shall be analyzed as "total
recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved Oxygen
Nitrate/Nitrite
Kjeldahl Nitrogen (TKN)
Oil and Grease
Phosphorus
Total Dissolved Solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (EPA Method 1631 E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total Phenolic Compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1, 1 -dichloroethane
1,2-dichloroethane
Trans-1,2-dichloroethylene
1, 1 -dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1, 1, 1 -trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl 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-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Page 9of14

Permit NCO069841
Reporting. Test results shall be reported on DWR Form -A MR-PPA1 (or in a form approved by the
Director) by December 31" of each designated sampling year. The report shall be submitted to the
following address: NC DEQ / DWR / Central Files, 1617 Mail Service Center, Raleigh, North
Carolina 27699-1617.
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that
Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also
subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.210)(5).
The US EPA requires four (4) toxicity tests for a test organism other. than the test species currently
required in this permit. The multiple species tests should be conducted either quarterly for a 12-month
period prior to submittal of the permit renewal application, or four tests performed at least annually in
the four and one half year period prior to the application. These tests shall be performed for acute or
chronic toxicity, whichever is specified in this permit. The multiple species toxicity test results shall be
filed with the Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E
(Toxicity Testing Data) of EPA Municipal Application Form 2A, when submitting the permit renewal
application to the NPDES Permitting Unit.
Page 10of14

Permit NCO069841
A. (5.) SCHEDULE OF COMPLIANCE FOR AMMONIA -NITROGEN LIMITATIONS
[G.S. 143-215.1(b)]
1. By January 31, 2019, the Permittee shall submit to the Division of Water Resources a Corrective
Action Plan summarizing the strategy or actions to be taken to achieve compliance with the
Ammonia -Nitrogen (NH3-N) limitations listed in Section A. (2.), which includes specific dates
for completion or implementation of each action.
2. By January 31, 2020, the Permittee shall submit a report to the Division summarizing actions
taken in accordance with the Corrective Action Plan submitted and approved by DWR.
3. By January 31, 2021, the Permittee shall submit a report to the Division summarizing actions
taken during the previous year to achieve compliance with the NH3-N limitations. The actions
shall be in accordance with the Corrective Action Plan submitted and approved by DWR.
4. The Permittee shall achieve compliance with NH3-N limitations specified in Section A. (2.) by
January 31, 2022.
Upon approval of the Corrective Action Plan by the Division, the report and actions become an
enforceable part of this permit. Any modifications to the schedule shall be requested to the Division at
least ninety (90) days before the deadline. Modifications to the schedule in excess of four (4) months
will be subject to public notice.
Corrective Action Plan and Reports shall include the owner's name, NPDES permit number and
Permittee contact person, and shall be submitted to:
(1) NCDEQ / Division of Water Resources
NPDES Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
(2) NCDEQ / Division of Water Resources
Mooresville Regional Office
610 E Center Ave., Suite 301
Mooresville, NC 28115
Page 11 of 14

Permit NCO069841
A. (6.) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December
21, 2015.
NOTE: This Section supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
.• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. Until such time that the state's
eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed original and a copy of the computer printed eDMR to the
following address:
NCDEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility
being physically located in an area where less than 10 percent of the households have broadband
access, then a temporary waiver from the NPDES electronic reporting requirements may be granted
and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1. 1, 2, 3) or alternative
forms approved by the Director. Duplicate signed copies shall be submitted to the mailing address
above. See "How to Request a Waiver from Electronic Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the 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.
Starting on December 21, 2020, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
Page 12 of 14

Permit NC0069841
Sewer Overflow/Bypass Event Reports;
Pretreatment Program Annual Reports; and
Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time
of each electronic submission. The permittee should use the EPA's website resources to identify the
initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity
for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at:
https://www.federalregister. gov/documents/20l 5/ l O/22/2015-24954/national-pollutant-discharge-
elimination-system-npdes-electronic-reporting-rule.
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Reauest a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to
the Division. Requests for temporary electronic reporting waivers must be submitted in writing to
the Division for written approval at least sixty (60) days prior to the date the facility would be
required under this permit to begin submitting monitoring data and reports. The duration of a
temporary waiver shall not exceed five (5) years and shall thereupon expire. At such time, monitoring
data and reports shall be submitted electronically to the Division unless the Permittee re -applies for
and is granted a new temporary electronic reporting waiver by the Division. Approved electronic
reporting waivers are not transferrable. Only permittees with an approved reporting waiver request
may submit monitoring data and reports on paper to the Division for the period that the approved
reporting waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
http://deg.nc.gov/about/divisions/water-resources/edmr
Page 13 of 14

Permit NC0069841
4. Sianatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part
I1, Section B. (11.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR
reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user
account and login credentials to access the eDMR system. For more information on North Carolina's
eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following
web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION
WILL BE ACCEPTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my 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. "
5. Records Retention [Supplements Section D. (6.)l
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR
submissions. These records or copies shall be maintained for a period of at least three (3) years from
the date of the report. This period may be extended by request of the Director at any time [40 CFR
122.41].
Page 14of14

Is-
t YPDRBA Station (upstream) _$j--' /�lfy,
YPDRBA Station (downstream)
8386206
5�_
Gm r�y•- '.
s l
Outfall 001 q`
r4
',� -_fir"" r" - •. '-c, 1, { _
` f:
r -
^` Crooked Creek WWTP-
1
EO_111
e _ ---- r:aticral GecgrapHc Society, i-cuted
r�r r
Crooked Creek WWTP #2 - NCO069841 Facility #dI
)
Location.
USGS Quad Names: Bakers Receiving Stream: N. Fork
(Outfall), Matthews (Facility) Crooked Creek
Lat.: 35°05'47" N Stream Class: C Union County
Long.: 80035'53" W Sub -basin: 03-07-12 NOYtj1 Map not to scale

ATTACHMENT 3 E
ENGINEERING PLANS

ENGINEERING PLANS SUBMITTED SEPARATELY

ATTACHMENT 3F
ENGINEERING SPECIFICATIONS

ENGINEERING SPECIFICATIONS SUBMITTED SEPARATELY

ATTACHMENT 3H
ENGINEERING CALCULATIONS

THIS PAGE INTENTIONALLY LEFT BLANK

UNION COUNTY WATER
CROOKED CREEK
WASTEWATER RECLAMATION FACILITY
UV DISINFECTION REPLACEMENT
DESIGN CALCULATIONS
5j1111111 ifff
-
A _
052610 4/16/2024
4s
''',ll011111+11++'
Hazen
APRIL 2024

CROOKED CREEK WRF UV DISINFECTION REPLACEMENT
DESIGN CALCULATIONS
INDEX
111mso 7•]d_T1»[do w:To]aI1:11
02 - UV DISINFECTION EQUIPMENT
03 - BUOYANCY CALCULATIONS

01 - HYDRAULIC PROFILE
Union County FORM ATC-10-23
Crooked Creek WRF UV Disinfection Replacement Attachment for Section 3.H
NPDES No. NCO069841

CCWRF Hydraulic Profile (Tertiary Only) 9-6-23
3/21/2024 7:54 PM
COUNTY
WATER
Union County Water
Crooked Creek WRF
Tertiary Treatment Only
Flow Description Units
Plant Influent Flow mgd
All Treatment
Units in Service
Low Diurnal Max Month Peak Day Peak Hour
Flow Flow Flow Flow
1.2 1.9 3.2 5.0
EFFLUENT PUMP STATION
Maximum Wetwell Level = 1 614.00 1 614.00 1 614.00 1 614.00
1.1 Effluent PS Influent Piping
Module OCC Short Circular Open Channel
Invert El =
613.50
Diameter =
20.00 in
Length =
5.00 ft
Manning n =
0.015
Slope =
0.0000 ft/ft
K-ent =
0.50
Downstream Conditions
Upstream Conditions
EGL = HGL
Q (mgd) =
1.2
1.9
3.2
5.0
Backwater (ft) =
0.50
0.50
0.50
0.50
Yc (ft) -
0.51
0.64
0.83
1.03
Yn (ft) =
0.30
1 0.38
0.48
1 0.61
Iterate 0 -1
N/A
N/A
N/A
N/A
Theta (rad) =
1.74
2.00
2.28
2.60
Area (sf) =
0.26
0.38
0.53
0.72
Actual Depth (ft) =
0.51
0.64
0.83
1.03
Theta (rad) =
2.33
2.66
3.12
3.62
Area (sf) =
0.56
0.77
1.08
1.42
V (fps) =
3.32
3.84
4.59
5.45
Sf (ft/ft) =
0.0059
0.0062
0.0069
0.0083
Upstream Depth (ft) =
Iterate 0 >>>
Check >>>
Theta (rad) =
Area (sf) =
V (fps) =
Sf (ft/ft)=
Hm (ft) =
1.1 Effluent PS Influent Piping
Module OCCS Circular Open Channel with supercritical flow
0.59
0.73
0.95
1.20
0.00
0.00
0.00
0.00
ok
ok
ok
ok
2.54
2.90
3.43
4.05
0.68
0.92
1.29
1.68
2.71
3.18
3.84
4.61
0.0034
0.0037
0.0044
0.0055
0.06
0.08
0.11
0.16
614.26
614.47
614.80
615.19
Upstrm Inv El = 615.25
Q (mgd) =
1.2
1.9
3.2
5.0
Diameter = 24.00 in
Yc (ft) -
0.48
0.61
0.79
0.98
K-ent = 0.50
Theta (rad) =
2.05
2.33
2.71
3.11
Area (sf) =
0.58
0.81
1.15
1.54
V (fps) =
3.18
3.65
4.31
5.02
Hm (ft) =
0.08
0.10
0.14
0.20
EGL = HGL
615.97
616.17
616.47
616.82
1 of 6

CCWRF Hydraulic Profile (Tertiary Only) 9-6-23
3/21/2024 7:54 PM
UNION
COUNTY
WAT E R
Union County Water
Crooked Creek WRF
Tertiary Treatment Only
Flow Description Units
Plant Influent Flow mgd
2.1 Lower Weir
Module WS Sharp Crested Weir
Weir Elev = 622.75 ft
Length = 8 ft
C. = 3.3
No. of End Contract 9 2
EGL = HGN
2.2 Upper Weir
Module WS Sharp Crested Weir
Weir Elev = 623.50 ft
Length = 1.5 ft
CW = 3.3
No. of End Contract 2
EGL = HGL
All Treatment
Units in Service
Low Diurnal Max Month Peak Day Peak Hour
Flow Flow Flow Flow
1.2 1.9 3.2 5.0
CASCADE AERATOR
Q (mgd) =
1.20
1
5.00
Nominal Hw (ft) =
0.17
0.23
0.33
0.44
Effective Weir Length =
7.97
7.95
7.93
7.91
Hw (ft) =
0.17
0.23
0.33
0.44
Weir Submergence (H2)=
0.00
0.00
0.00
0.00
<If Subm> H1 (ft) _
<If Subm> Iterate 0 »>
Check »>
Q (mgd) =
Nominal Hw (ft) =
Effective Weir Length =
Hw (ft) =
Weir Submergence (H2)=
<If Subm> H1 (ft) _
<If Subm> Iterate 0 »>
Check >>>
2.3 UV Effluent Piping (UVE Channel to Cascade Aerator)
Module P/P1
Piping by Hazen -Williams Equation
Diameter =
30.00 in
Length =
35 ft
Hazen & Will. C =
110
Minor Loss K's :
Entrance 1
Exit 0.5
90 bend 0.3
Sum K = 1.8
EGL = HGL
1.00
2.14
3.14
1.31
0.000
0.000
0.000
0.000
Not Subm
Not Subm
Not Subm
Not Subm
622.92 622.98 623.08 623.19
0.52
0.71
1.00
1.35
1.40
1.36
1.30
1.23
0.55
0.75
1.10
1.54
0.00
0.00
0.00
0.00
.00
2.14
1.31
000
F0.
0.000
0.000 0.000
Subm
Not Subm
Not Subm I Not Subm
624.05 624.25 624.60 625.04
Q (mgd) _` 1.20
3.20
V (fps) = 0.38
0.60
1.01
1.58
Hv (ft) = 0.00
0.01
0.02
0.04
Hf (ft) = 0.00
0.00
0.01
0.01
Hm (ft) = 0.00
0.01
0.03
0.07
HL (ft) = 0.01
0.01
0.03
0.08
624.05
624.27
624.63
625.12
2of6

CCWRF Hydraulic Profile (Tertiary Only) 9-6-23
3/21/2024 7:54 PM
COUNTY
WATER
Union County Water
Crooked Creek WRF
Tertiary Treatment Only
All Treatment
Units in Service
Low Diurnal Max Month Peak Day Peak Hour
Flow Description Units Flow Flow Flow Flow
Plant Influent Flow mgd 1.2 1.9 3.2 5.0
UV DISINFECTION FACILITY
3.1 UV Effluent Channel After Weir
Module OCR Short Rectangular Open Channel
Invert El =
619.50
Width =
5.00 ft
Length =
5.33 ft
Manning n =
0.015
Slope =
0.0000 ft/ft
K-ent =
0.50
Downstream Conditions
Upstream Conditions
EGL = HGL
3.2 UV Effluent Fixed Weir
Module WS Sharp Crested Weir
Q (mgd) =
1.20
1.90
3.20
5.00
Backwater (ft) =
4.55
4.77
5.13
5.62
Yc (ft) =
0.16
0.22
0.31
0.42
Yn (ft) =
1.17
1.50
1.54
2.54
Iterate 0 -1
N/A
N/A
N/A
N/A
Area (sf) =
5.87
7.48
7.71
12.71
Actual Depth (ft) =
4.55
4.77
5.13
5.62
Area (sf) =
22.75
23.83
25.67
28.10
V (fps) =
0.08
0.12
0.19
0.28
Sf (ft/ft) =
0.0000
0.0000
0.0000
0.0000
Upstrm Depth (ft) =
4.55
1 4.77
5.13
5.62
Iterate 0 >>>I
0.000
1 0.000
1 0.000
1 0.000
Check >>>I
ok
I ok
I ok
I ok
Area (sf) =
22.75
23.83
25.67
28.10
V (fps) =
0.08
0.12
0.19
0.28
Sf (ft/ft)=
0.0000
0.0000
0.0000
0.0000
Hm (ft) =
0.00
0.00
0.00
0.00
624.05
624.27
624.64
625.12
UV Weir Freeboard (ft) =
1.57
1.35
0.98
0.50
UV Weir Freeboard (in) =
18.83
16.23
11.81
5.97
Weir Elev =
625.62 ft Q (mgd) =
Length =
26 ft Nominal Hw (ft) =
CW =
3.3 Effective Weir Length =
No. of End Contract
0 Hw (ft) =
Weir Submergence (H2)=
<If Sub m> H1 (ft) _
<If Subm> Iterate 0 »>
Check >>>
EGL = HGL
1.20
1.90
3.20
5.00
0.08
0.11
0.15
0.20
26.00
26.00
26.00
26.00
0.08
0.11
0.15
0.20
0.00
0.00
0.00
0.00
.00
3.00
2.70
3.70
000
iNot
0.000
0.000
0.000
Subm
Not Subm
I Not Subm
Not Subm
625.70 625.73 625.77 625.82
3of6

CCWRF Hydraulic Profile (Tertiary Only) 9-6-23
3/21/2024 7:54 PM
COUNTY
WATER
Union County Water
Crooked Creek WRF
Tertiary Treatment Only
Flow Description Units
Plant Influent Flow mgd
3.3 Channel Contraction Upstream of UV Fixed Weirs
Module OCRXC Rectangular Open Channel Expansion / Contraction
All Treatment
Units in Service
Low Diurnal Max Month Peak Day Peak Hour
Flow Flow Flow Flow
1.2 1.9 3.2 5.0
Invert ds =
624.66 ft
Q (mgd) =
1.20
1.90
3.20
5.00
Width ds =
2.56 ft
Yc (ft) =
0.25
0.34
0.49
0.66
Invert us =
620.33 ft
Depth ds (ft) =
1.04
1.07
1.11
1.16
Width us =
2.56 ft
V ds (fps) =
0.70
1.08
1.74
2.60
k =
0.5
Depth us (ft) =1
5.38
5.42
5.51
5.64
Iterate 0 -1
0.00
0.00
0.00
0.00
Check -I
ok
ok
ok
ok
V us (fps) =
0.13
0.21
0.35
0.54
HGL
3.4 UV Channel Downstream of Lamps
Module OCR Short Rectangular Open Channel
Invert El =
620.33
Width =
2.56 ft
Length =
2.58 ft
Manning n =
0.015
Slope =
0.0000 ft/ft
K-ent =
0.50
Downstream Conditions
Upstream Conditions
EGL = HGL
3.5 Headloss through UV
Module MFR Manufacturer Head Loss Info
Reference Q = 5 mgd
Reference HL = 0.13 ft
EGL = HGL
625.71 625.75 625.84 625.97
Q (mgd) =
1.20
1.90
3.20
5.00
Backwater (ft) =
5.38
5.42
5.51
5.64
Yc (ft) =
0.25
0.34
0.49
0.66
Yn (ft) =
1.17
1.50
1.54
2.54
Iterate 0 -1
N/A
N/A
N/A
N/A
Area (sf) =
3.01
3.84
3.95
6.51
Actual Depth (ft) =
5.38
5.42
5.51
5.64
Area (sf) =
13.78
13.89
14.11
14.46
V (fps) =
0.13
0.21
0.35
0.54
Sf (ft/ft) =
0.0000
0.0000
0.0000
0.0000
Upstrm Depth (ft) =
5.38
5.42
5.51
5.64
Iterate 0 >>>I
0.000
1 0.000
1 0.000
1 0.000
Check >>>I
ok
I ok
I ok
I ok
Area (sf) =
13.78
13.89
14.11
14.46
V (fps) =
0.13
0.21
0.35
0.54
Sf (ft/ft)=
0.0000
0.0000
0.0000
0.0000
Hm (ft) =
0.00
0.00
0.00
0.00
625.71
625.75
625.84
625.98
Q (mgd) = 1.20 1.90 3.20 5.00
HL (ft) = 0.01 0.02 0.05 0.13
625.72 625.77 625.89 626.10
4of6

CCWRF Hydraulic Profile (Tertiary Only) 9-6-23
3/21/2024 7:54 PM
COUNTY
WATER
Union County Water
Crooked Creek WRF
Tertiary Treatment Only
Flow Description Units
Plant Influent Flow mgd
3.6 UV Channel Upstream of Lamps
Module OCR Short Rectangular Open Channel
Invert El = 620.33
Width = 2.56 ft
Length = 16.00 ft
Manning n = 0.015
Slope = 0.0000 ft/ft
K-ent = 0.50
Downstream Conditions
Upstream Conditions
EGL = HGL
3.7 UV Facility Influent Pipe (to new MH)
Module PIP Piping by Hazen -Williams Equation
All Treatment
Units in Service
Low Diurnal Max Month Peak Day Peak Hour
Flow Flow Flow Flow
1.2 1.9 3.2 5.0
Q (mgd) =
1.20
1.90
3.20
5.00
Backwater (ft) =
5.39
5.44
5.56
5.77
Yc (ft) =
0.25
0.34
0.49
0.66
Yn (ft) -1
1.17
1.50
1.54
1 2.54
Iterate 0 »>
N/A
I N/A
I N/A
I N/A
Area (sf) =
3.01
3.84
3.95
6.51
Actual Depth (ft) =
5.39
5.44
5.56
5.77
Area (sf) =
13.80
13.94
14.25
14.79
V (fps) =
0.13
0.21
0.35
0.52
Sf (ft/ft) =
0.0000
0.0000
0.0000
0.0000
Upstrm Depth (ft) =
5.39
5.44
5.56
5.77
Iterate 0 >>>I
0.000
1 0.000
1 0.000
1 0.000
Check ->I
ok
ok
ok
ok
Area (sf) =
13.80
13.94
14.25
14.80
V (fps) =
0.13
0.21
0.35
0.52
Sf (ft/ft)=
0.0000
0.0000
0.0000
0.0000
Hm (ft) =
0.00
0.00
0.00
0.00
625.72
625.77
625.89
626.11
Diameter = 30.00 in
Q (mgd) =
1.20
1.90
3.20
5.00
Length = 8 ft
V (fps) =
0.38
0.60
1.01
1.58
Hazen & Will. C = 110
Hv (ft) =
0.00
0.01
0.02
0.04
Minor Loss K's : Exit 0.5
Hf (ft) =
0.00
0.00
0.00
0.00
BFV 0.3
Hm (ft) =
0.00
0.01
0.03
0.07
Entrance 1
HL (ft) =
0.00
0.01
0.03
0.07
Sum K = 1.8
EGL = HGL
3.8 UV Facility Influent Pipe (new MH to existing MH)
Module PIP Piping by Hazen -Williams Equation
Diameter = 20.00 in
Length = 10.5 ft
Hazen & Will. C = 110
Minor Loss K's : Exit 0.5
Entrance 1
Sum K = 1.5
625.72 625.78 625.92 626.18
Q (mgd) =
1.20
1.90
3.20
5.00
V (fps) =
0.85
1.35
2.27
3.55
Hv (ft) =
0.01
0.03
0.08
0.20
Hf (ft) =
0.00
0.01
0.01
0.03
Hm (ft) =
0.02
0.04
0.12
0.29
HL (ft) =
0.02
0.05
0.13
0.32
5of6

CCWRF Hydraulic Profile (Tertiary Only) 9-6-23
3/21/2024 7:54 PM
UNION
COUNTY
WAT E R
Union County Water
Crooked Creek WRF
Tertiary Treatment Only
Flow Description Units
Plant Influent Flow
EGL_
All Treatment
Units in Service
Low Diurnal
Flow
Max Month Peak Day
Flow Flow
Peak Hour
Flow
1.2
1.9 3.2
5.0
625.74
625.83 626.06
626.51
3.9 Pipe from existing MH to Filters
Module PIP1
Piping by Hazen -Williams Equation
Diameter =
20.00 in Q (mgd) =
Length =
loft V (fps) =
Hazen & Will. C =
110 Hv (ft) =
Minor Loss K's :
Entrance 1 Hf (ft) =
Exit 0.5 Hm (ft) =
Bends 0.3 HL (ft) =
Sum K = 1.8
EGL_
Filter Effluent Weir Freeboard (ft) =
Filter Effluent Weir Freeboard (in) =
Existing WSE in Filter Effluent Channel:
Difference in Elevation:
ers
4.1 Filter Effluent Weir
Module WS Sharp Crested Weir
Weir Elev = 626.80 ft
Length = 6 ft
CW = 3.3
No. of End Contractions= 2
EGL = HCA
3.20
0.85
1.35
2.27
3.55
0.01
0.03
0.08
0.20
0.00
0.00
0.01
0.03
0.02
0.05
0.14
0.35
0.02
0.06
0.16
0.38
625.74
625.84
626.08
626.56
1.06
0.96
0.72
0.24
12.7
11.5
8.6
2.8
623.98
624.30
624.92
626.22
1.76
1.54
1.16
0.35
Q (mgd) =
0.80
1.27
2.13
3.33
Nominal HW (ft) =
0.16
0.21
0.30
0.41
Effective Weir Length =
5.97
5.96
5.94
5.92
HW (ft) =
0.16
0.21
0.30
0.41
Weir Submergence (H2)=
0.00
0.00
0.00
0.00
<If Subm> H' (ft) _
<If Subm> Iterate 0 »>
Check »>
1.00
2.14
1.31
0.43
0.000
0.000
0.000
0.000
Not Subm
Not Subm
Not Subm
Not Subm
626.96 627.01 627.10 627.21
6of6

02 - UV DISINFECTION EQUIPMENT
Union County FORM ATC-10-23
Crooked Creek WRF UV Disinfection Replacement Attachment for Section 3.H
NPDES No. NCO069841

Crooked Creek WRF: New UV Equipment by Trojan
The existing UV system at Crooked Creek WRF, which was constructed in 2003, will be replaced by
a new UV disinfection system as part of this project. The existing permit limit and facility design
criteria are summarized in the table below. One channel will operate to disinfect the design flow of
1.9 mgd and will have the capacity to disinfect a peak flow of 5 mgd. The system will include a
standby bank of lamps for redundancy in equipment.
DESIGN CRITERIA
Design Flow:
1.9 mgd
Peak Flow:
5.0 mgd
UV Transmittance:
60% (Confirmed in field testing)
Total Suspended Solids (TSS):
30 mg/1 (30 Day Average, grab sample)
Disinfection Limit:
200 Fecal Coliform per 100 ml, 30 day Average of consecutive
daily grab samples
Redundancy:
One (1) Redundant Bank per Channel
In accordance with N.C.G.S. 133-3, the Trojan Technologies UV Signa equipment was named the
preferred brand for UV disinfection equipment for this project. The UV equipment, accessories, and
other specified services will be available for purchase by the General Contractor for installation
under the project. The received proposal for Trojan UV Signa equipment is attached at the end of
this section and summarized in the table below.
TROJAN TECHNOLOGIES UV SIGNA DESIGN SUMMARY
CHANNEL
Number of Channels:
One (1)
Min. Channel Length Required:
33'-6"
Channel Width at UV Banks:
2'-63/4"
Channel Depth Required:
7'-8"
UV BANKS
Number of Banks per Channel:
Two (2) duty, one (1) standby
Number of Lamps per Bank:
Eight (8)
Total Number of UV Lamps:
Twenty-four (24)
Maximum Power Draw:
26 kVa
UV PANELS
Power Distribution Center Quantity:
Three (3)
Hydraulic System Center Quantity:
One (1)
System Control Center Quantity:
One (1)
ANCILLARY EQUIPMENT
Level Controller Quantity and Type:
Fixed weir
Integral Bank Walls and Culvert:
Included
ELECTRICAL REQUIREMENTS

1. Each Power Distribution Center requires an electrical supply of one (1) 480V, 3 phase, 4
wire + GND, 50/60 Hz, 10.5 kVA
2. Electrical supply for Hydraulic System Center will be (1) 480V, 3 phase, 3 wire + GND, 60
Hz, 2.5 kVA
3. Electrical supply for System Control Center will be (1) 120V, 1 Phase, 2 Wire + GND,
50/60Hz, 1.8 kVA

TROJAN UV -
WATER CONFIDENCE"
SCOPE OF SUPPLY FOR UNION COUNTY - CROOKED CREEK WWTP, NORTH CAROLINA
ULTRAVIOLET DISINFECTION EQUIPMENT — TROJANUVSignaTM
Prepared for: Hazen & Sayer
Specification Section: 46 66 00 10/25/23
Trojan Quote: 238938 (November 7, 2023)
Design Criteria: Current Peak Design Flow: 5 MGD
Average Flow: 2 MGD
UV Transmission: 60%, minimum
Total Suspended Solids: 10 mg/L (Maximum, grab sample)
Minimum Dose: 30 mJ/cm2, MS2 RED
Discharge Limit: 200 Fecal Coliform/100 mL (30 Day Geometric Mean)
400 Fecal Coliform/100 mL (7 Day Geometric Mean)
We are pleased to submit the following scope of equipment based on the above criteria.
The purchaser is responsible for reading all information contained in this Supply Contract. Trojan will not
be held accountable for the supply of equipment not specifically detailed in this document. Detailed
installation instructions are provided with the shop drawings and are available earlier upon request.
Changes to this Scope of Supply that affect selling price will be handled through a change order.
Please refer inquiries to Trojan Manufacturer's Representative:
Representative: Shane Eckley
EW2 Environmental, Inc.
Phone: [phone]
Email: seckleyCcDew2.net
This proposal has been respectfully submitted by,
Trojan Technologies
Regional Manager
Michael Shortt
Trojan Technologies 3020 Gore Road London, Ontario, Canada N5V 4T7 T 519.457.3400 F 519.457.3030 www.TROJANUV.com

UNION COUNTY - CROOKED CREEK WWTP REPLACEMENT UV SYSTEM Page 2 of 7
UV Disinfection System Scope of Supply
GENERAL CONFIGURATION
The TrojanUVSigna equipment described in this Scope of Supply consists of two (2) duty and one (1) redundant
UV banks for one (1) UV channel.
Unless otherwise indicated in this proposal all anchor bolts, conduit, conductors, local disconnects and transformers
(if required) are the responsibility of the Installation Contractor and are not included in Trojan's Scope of Supply.
Specific cable types listed below are for reference only. Selecting cables that are appropriate for the installation
environmental conditions and in compliance with local code is the responsibility of the Installation Contractor.
Site to provide approved (engineered) anchor points for personnel to use as part of their fall restraint system around
open channels. The anchor points must be positioned so that the preferred retractable lifeline of 8 ft is of sufficient
length to access the work at the channel. Refer to local safety regulation.
UV BANKS
Trojan's Responsibility:
Each bank supplied will consist of TrojanUV Solo LampsTM, quartz sleeves, supporting structures, ActiCleanTM
chemical/mechanical cleaning system and an automatic bank lifting mechanism. UV lamps are powered from an
individual electric feed from a lamp driver located in a Power Distribution Center (PDC).
Model and Make: TrojanUVSignaTM
Quantity: Three (3) UV Banks
Each bank will be supplied with eight (8) UV lamps and quartz sleeves,
one (1) UV intensity sensor, one (1) ActiClean chemical -mechanical
wiping system and one (1) automatic bank lifting mechanism
Rating: Type 6P / IP68 (lamp sleeve assemblies)
Approximate Weight: 370 Ibs per UV bank
Installation Contractor's Responsibility:
The Installation Contractor shall install, align, secure, and seal (grout) each UV bank frame in the channel per the
instructions provided. The Installation Contractor shall provide solid grating downstream of the UV bank to block
out UV light. Please refer to the supplied Trojan -supplied drawings for details.
SYSTEM CONTROL CENTER
Trojan's Responsibility:
A System Control Center (SCC) shall be supplied to monitor and control the UV disinfection System. Trojan will
provide a PLC 1/0 and soft address map to aid the Installation Contractor with integration of the UV PLC and
SCADA system.
Note: if Trojan is required to provide a managed switch in the SCC, the Plant's IT department or System
Integrator will be responsible for configuring the switch to meet the Plant's security and traffic routing
requirements.
The UV SCC shall consist of the following:
Quantity Supplied:
Location:
Controller Type:
Operator Interface:
Material / Rating:
Approximate Weight:
SCADA:
Surge Protection:
Panel UPS:
One (1) SCC
Floor Mounted
AB CompactLogix
15" Beijer HMI (Outdoor 4X Rated)
304 Stainless Steel (Type 4X, IP 66)
700 Ibs
EtherNet/I P
Trojan standard TVSS
15 minutes via 24 VDC
November 7, 2023 Scope of Supply by: Trojan Technologies

UNION COUNTY - CROOKED CREEK WWTP REPLACEMENT UV SYSTEM
UV Disinfection System Scope of Supply
Page 3 of 7
Installation Contractor's Responsibility:
The Installation Contractor is responsible for mounting the SCC as indicated on the drawings. Unless otherwise
indicated, the Installation Contractor is also responsible for the supply, installation and connection of the following
at the SCC:
1. One (1) 120V, 60 Hz, 1 Phase, 2 Wire + GND, 1.8kVA (maximum) power feed
2. One (1) bond link to plant ground, in accordance with applicable codes and standards
3. One (1) Modbus communication link, Belden 3106A (or equivalent), to PDCs and HSC
4. One (1) Cat 5e Ethernet communication link to SCADA
5. One (1) 4-20 mA analog shielded twisted pair from plant flow meter
6. One (1) 4-20 mA analog shielded twisted pair from online UV Transmittance monitor
7. One (1) discrete, 2 conductor cable from each Level Sensor Control Boxes for high water level signal
POWER DISTRIBUTION CENTERS
Trojan's Responsibility.
The Power Distribution Center (PDC) distributes power to the UV lamps and shall consist of the following:
Quantity Supplied: Three (3) Single -wide PDCs (one per UV bank)
Method of Cooling: Air-conditioning (including heater)
Material / Rating: 304 Stainless Steel (Type 4X, IP 66)
Approximate Weight: 1213 Ibs each
Surge Protection: Trojan standard TVSS
Installation Contractor's Responsibility:
The Installation Contractor is responsible for setting in place and bolting the PDC in location. The Installation
Contractor is also responsible for the supply, installation and connection of the following at each PDC:
1. One (1) 480 / 277V, 60 Hz, 3 phase, 4 wire + GND, 10.5 kVA power feed with local disconnect
2. One (1) bond link to plant ground in accordance with applicable codes and standards (to underside of
panel)
3. One (1) bond link from each UV bank to the corresponding PDC in accordance with the applicable
drawings, specifications, codes, and standards
4. One (1) bank -in -place sensor cable (by Trojan) from each UV bank to its corresponding PDC
5. One (1) UV intensity sensor cable (by Trojan) from each UV bank to its corresponding PDC
6. One (1) Modbus communication link, Belden 3106A (or equivalent), from the SCC
7. One (1) discrete, 2 conductor cable from each Level Sensor Control Box for Low Water Level signal
8. Installation and termination of lamp cables from the UV banks to the PDC. (Qty: 8 per UV Bank —
supplied by Trojan)
HYDRAULIC SYSTEM CENTER
Trojan's Responsibility.
The Hydraulic System Center (HSC) houses the ancillary equipment required to operate the quartz sleeve cleaning
system and automatic bank lifting mechanism.
Quantity Supplied:
One (1) HSC
Materials / Rating:
304 Stainless Steel (Type 4X, IP 66)
Hydraulic Fluid:
Mineral Oil
Approximate Weight:
500 Ibs
Surge Protection:
Trojan standard TVSS
Installation Contractor's Responsibility.
The Installation Contractor is responsible for setting in place and bolting the HSC as shown on the Trojan drawings.
The Installation Contractor is responsible for the supply, connection and installation of the following at the HSC:
November 7, 2023 Scope of Supply by: Trojan Technologies

UNION COUNTY - CROOKED CREEK WWTP REPLACEMENT UV SYSTEM Page 4 of 7
UV Disinfection System Scope of Supply
1. One (1) 480V, 60Hz, 3 phase, 3 wire + GND, 2.5 kVA power feed with local disconnect
2. One (1) bond link to plant ground, in accordance with applicable codes and standards
3. One (1) Modbus communication link, Belden 3106A (or equivalent), from the SCC
4. Cut and crimp hydraulic hoses (hoses and connections supplied by Trojan)
5. Connection of the hydraulic hoses, total of four (4) per UV bank
WATER LEVEL CONTROLLER
Trojan's Responsibility
A level control device is required to maintain and control the effluent level in the channel, regardless of flow rate.
Level controller for this project is outside of Trojan's Scope of Supply and shall be provided by others.
The level controller headloss shall be such that the overall headloss of the UV channel (including UV banks) does
not exceed 12".
Installation Contractor's Responsibility:
The Installation Contractor is responsible for setting in place, bolting, grouting and sealing each level control weir
trough as per Trojan's and Engineer's drawings.
WATER LEVEL SENSORS
Trojan's Responsibility:
A Low Water Level Sensor is required downstream of the UV System to generate a low water level signal that will
shut down and protect the UV System if the water level in the channel drops too low.
Quantity Supplied: Three (3) electrode type level sensors; two (2) for low water level
sensors and one (1) for high water level sensor
Approximate Weight: 10 Ibs (panel)
Installation Contractor's Responsibility:
The Installation Contractor is responsible for setting in place and bolting the water level sensor panel to the effluent
channel wall as per Trojan's and Engineer's drawings.
LEVEL SENSOR CONTROL BOX
Trojan's Responsibility:
Trojan will provide a wall mounted Level Sensor Control Box (24" x 14" x 6"), to provide power and relays for the
Low Level Sensors.
Quantity Supplied: Two (2) Level Sensor Control Boxes
Materials / Rating: 304 Stainless Steel (Type 4X)
Approximate Weight: 40 Ibs each
Installation Contractor's Responsibility:
The Installation Contractor is responsible for mounting the Level Sensor Control Box as indicated on the drawings.
Contractor is also responsible for supplying mounting hardware, watertight conduit and for the supply, installation
and connection of the following at each Control Box:
1. One (1) 120 Volt, 1 phase, 2 wire + GND, 0.12 kVA power supply
2. One (1) discrete, 2 conductor cable from the Low Level Sensor to its Level Sensor Control Box
3. One (1) discrete, 2 conductor cable from the Level Sensor Control Box to each PDC (for Low Water
Level signal)
4. One (1) discrete, 2 conductor cable from each Level Sensor Control Box to the SCC (for high water
level signal)
5. One (1) discrete, 2 conductor cable from the High Level Sensor to the corresponding Level Sensor
Control Box
November 7, 2023 Scope of Supply by: Trojan Technologies

UNION COUNTY - CROOKED CREEK WWTP REPLACEMENT UV SYSTEM Page 5 of 7
UV Disinfection System Scope of Supply
UV TRANSMISSION MONITOR
Trojan's Responsibility:
An on-line UV Transmission Monitor will be supplied to provide a UVT measurement of the source water.
Description: One (1) Hach UVASsc UVT monitor including: One (1) submersible
probe with mounting kit, One (1) sc4500 Controller and 25 ft cable
between the probe and the controller
Enclosure Rating: Type 4X
Controller Dimensions: 12 x 12 x 4 in
Approximate Weight: 30 Ibs (includes probe and Controller)
Probe Immersion Depth: up to 6 ft
Installation Contractor's Responsibility:
The Installation Contractor is responsible for setting in place and mounting the Controller panel and the probe. The
Installation Contractor is also responsible for the supply, installation and connection of the following at the Controller:
1. One (1) 120 Volt, 1 phase, 2 wire + GND, 50 VA power supply
2. One (1) 4-20mA analog shielded twisted pair to the SCC
3. Installation of sensor communication cable (by Trojan) between the probe and Controller
4. Anchor bolts as required for mounting Controller and probe to the channel edge
SPARE PARTS AND ADDITIONAL EQUIPMENT
Trojan's Responsibility:
The following equipment will be supplied with the UV system:
Description
Quantity
1 kW Solo UV Lamp
Three (3)
-----------------------------------------------
Quartz Sleeve
-----------------------------------------------
Two (2)
-----------------------------------------------
Pair of Wiper Seals
-----------------------------------------------
Eight (8)
-----------------------------------------------------------------------
2kW Solo Lamp Driver
One (1)
---------------------------------------------------------------------------------------------
UV Intensity Sensor
-----------------------------------------------
One (1)
---------------------------------------------------------------------------------------------
Operators Kit
-----------------------------------------------
Four (4)
---------------------------------------------------------------------------------------------
ActiClean WW 4 x 4L (Case)
-----------------------------------------------
One (1)
---------------------------------------------------------------------------------------------
UV Warning Signs
-----------------------------------------------
Four (4)
UV Bank proximity switch
One (1)
Lamp Holder Seals
Eight (8)
Canister for Cleaning system
One 1
304 SST Nameplates
One (1) set
MICROBIOLOGICAL PERFORMANCE TESTING
Trojan's Responsibility:
Trojan will supply a performance testing protocol to the Installation Contractor to be forwarded to the Engineer for
approval. Trojan will produce the final test report (based on data supplied by the independent lab) and will forward
the final report to the Installation Contractor.
Installation Contractor's Responsibility:
The Installation Contractor is to cover all associated onsite costs for performance testing (independent lab services,
bottles, shipment, etc.). The Installation Contractor is also responsible for completing the performance testing as
per the testing protocol supplied by Trojan and approved by the Engineer for the remainder of the performance
testing (as required by the Owner/Engineer).
November 7, 2023 Scope of Supply by: Trojan Technologies

UNION COUNTY - CROOKED CREEK WWTP REPLACEMENT UV SYSTEM Page 6 of 7
UV Disinfection System Scope of Supply
NOTES AND CLARIFICATIONS TO SPECIFICATION
Division 40 was not provided for Trojan's review of non-standard feature. As such Trojan System Control
Center (SCC) will be based on Trojan standard design and will not comply with any customizations
outlined in Div. 40.
Section 46 66 00,
o Article 1.1 B — Cable trays are outside of Trojan Scope of supply and shall be provided by
Installation Contractor per article 1.2 B of UV spec section.
o Article 1.1 D — It is Trojan's understanding that the firmware outlined in this paragraph is related
to communication boards. Trojan can supply locked PLC and HMI programs so the customer can
develop their SCADA interface.
o Article 2.2 G — Module support rack is not a product offering with Signa2Row UV system.
o Article 2.3 C.7 — Trojan PDCs will use a discrete temperature sensor within the PDC panel to
provide a high temperature warning at 50 deg. C and a high temperature shut down at 55 deg. C.
o Article 2.3 E.1 & 2 — Please note that individual lamp and driver faults are represented
graphically on the bank overview screen, with a general fault indicating the associated bank has a
lamp or driver fault (Bank X Lamp fault, Bank X driver fault).
o Article 2.3 E. 8 — Not a product offering. High Ballast/drive temperature alarms cannot be
disabled from PLC (in UV SCC enclosure). It is mechanically set at PDC.
o Article 2.3 E. 9 — Maximum start-up in -rush current is less than 21A peak.
o Article 2.4 F. & G. — Trojan standard alarms will be provided. Moreover, alarm priorities are not
configurable as they're directly tied to the system response for maintaining UV Dose.
o Article 2.4 K — UVI is only available in mW/cm2 in Signa2ROW product.
DOCUMENTATION (SHOP DRAWINGS AND O&M MANUALS)
The following documentation will be supplied by Trojan per the following schedule:
• One (1) electronic copy of Trojan Shop Drawing 5 — 6 weeks after receipt of written purchase order. Note
that Submittals will not be issued externally until PO is fully executed.
• One (1) electronic copy of Trojan Standard O&M manuals at time of equipment delivery
DELIVERY, START-UP AND TRAINING
Equipment shipped 29 — 31 weeks after approval of Shop Drawings.
Trojan's Responsibility:
The following start-up services will be provided by Trojan -certified technicians:
• Up to one (1) day in one (1) trip for Unloading inspection
• Up to one (1) day in one (1) trip for Installation assistance. Additional days as required to be by phone or
fax. Technical Assistance Center 1-866-388-0488 or tac@troj anuv. com
• Start-up and testing of the installed UV equipment.
o If the Trojan's Certified Service Technician determines the Contractor work is not complete and
the start-up cannot be completed in the allotted time a return visit will be scheduled at the
Contractors expense.
• Classroom and/or jobsite training for operations staff
o If trainees are not available a return visit will be scheduled at the Contractors expense.
• Up to one (1) day in one (1) trip for refresher training (3 to 6 months after startup)
• Up to one (1) day in one (1) trip for supervising the Performance Test
November 7, 2023 Scope of Supply by: Trojan Technologies

UNION COUNTY - CROOKED CREEK WWTP REPLACEMENT UV SYSTEM Page 7 of 7
UV Disinfection System Scope of Supply
Installation Contractor's Responsibility:
The Contractor is responsible for:
• Un loading of the components supplied by Trojan, storage of all components, if required in a clean dry
environment including ActiCleanTm Gel. Note the ActiClean gel must be stored in a climate -controlled
area to prevent freezing.
• Installing the equipment outlined in the scope of Supply in accordance with contract drawings, Trojan's
shop drawings, instructions and installation checklists.
• Supplying all conduits and conductors and components per the sites state regulations and components
indicated as supplied by others.
• Completing and submitting the Checklist at least two (2) weeks prior to date requested for commissioning.
• Trojan panels with forced -air cooling design require installation in an environmentally controlled room
suitable for electrical distribution or motor drive equipment.
WARRANTY
Trojan will warrant the equipment and parts for 24 months after start-up or 30 months after shipment, whichever
comes first. Warranty does not cover labor or consumables.
Refer to attached Terms and Conditions for additional details.
• UV lamps shall be warranted for 15,000 hours. (std proration removed)
• Lamp drivers shall be warranted for 10 years. (std proration removed)
• UV intensity sensors shall be warranted for 5 years.
• Quartz sleeves shall be warranted for 10 years.
SELLING PRICE
$ 449,850 USD
Selling price does not include any duties or taxes that may be applicable.
Freight included if destination is within North America.
Incoterms 2020: Ex Works (EXW) or Cost, Insurance and Freight (CIF) to destination or port will apply for
all other destinations.
PAYMENT TERMS & INVOICING MILESTONES
Net 30 Days
• 15% upon Submittal Approval
• 75% upon Equipment Delivery to job site
• 5% upon Equipment Installation or 90 days after Delivery (whichever occurs first)
• 5% upon Equipment Acceptance
If UV System Start-up is required within 30 days of shipment, Trojan requires 95% payment unless agreed upon
in writing before authorizing system Start-up.
TERMS & CONDITIONS
Trojan appreciates the opportunity to submit this proposal. Our proposal is submitted subject to and based on Trojan
Our proposal is submitted subject to and based on Trojan's standard terms and conditions, which we have attached
as part of our proposal. We believe these terms and conditions are customary in the trade and respectfully reserve
the opportunity to negotiate, fair and reasonable contract terms acceptable to both parties, if Trojan is selected for
this project.
November 7, 2023 Scope of Supply by: Trojan Technologies

03 - BUOYANCY CALCULATIONS
Union County FORM ATC-10-23
Crooked Creek WRF UV Disinfection Replacement Attachment for Section 3.H
NPDES No. NCO069841

Hazen
Project
Job Ref.
Crooked Creek WRF
30831-068
Hazen and Sawyer
9101 Southern Pine Boulevard
Subject
UV Disinfection Facility Flotation Calculations
Sheet no./rev.
Calc. by
Date
Chk'd by
Date
App'd by
Date
Suite 250
Charlotte, NC 28273
MTC
4/16/2024
UV DISINFECTION FACILITY - FLOATATION CALCULATIONS
Assumptions / Parameters
Tank is empty during a 100 year flood event
100 year flood elevation — 623.25'
Top of slab elevation — 628.00'
Average height of structure below flood plain — 4 ft
Slab thickness — 1.0 ft
Outside area of tank - 260 sf
Peremeter of UV tank — 106 ft
Lengeth of UV tank — 44.83 ft
Average width of aeration tank — 7 ft / 8 ft
Average buried height of tank — 9 ft
Weight of concrete = 150 Ib/cf
Safety factor — 1.5
Weight of water — 62.4 Ib/cf
Calculations
Uplift force on UV Disinfection Facility
Height of submerged portion of tank = 4 ft
Uplife Force = 62.4 Ib/cf x 260 sf x 4 ft = 64.9 kips
Concrete tank weight
Bottom Slab = 150 Ib/cf x 1 ft x 260 sf = 39 kips
Walls = 150 Ib/cf x (44.83 ft x 2 +8 ft +7 ft) x1 ft x 9 ft = 137.25 kips
Total weight = 39 kips + 137.25 kips = 176.25 kips
Safety Factor = 805.2 kips / 530.4 kips = 2.7 — OK — Structure flotation resistance is adequate