NC0024970_Application (ATC)_20240429

CDM
Smith
RECEIVED
4600 Park Road,Suite 240
Charlotte,North Carolina 28209
tel:[phone] APR 2 9 2024
NCDEQ/DWR/NPDES
April 26, 2024
NC Department of Environment and Natural Resources
Division of Water Resources/NPDES
1617 Mail Service Center
Raleigh,North Carolina 27699
Subject: McAlpine Creek Wastewater Management Facility
Nutrient Harvesting Facility
Authorization to Construct Application
To Whom It May Concern:
Charlotte Water proposes to construct facility modifications and upgrades to its McAlpine Creek
Wastewater Management Facility(WWMF) (NPDES Permit No.NC0047384).The McAlpine Creek
WWMF currently has a permitted capacity of 64 mgd,and no changes to this capacity are proposed
as a part of this project.
Enclosed is an application for Authorization to Construct approval to accomplish this work.Project
includes construction of a new Nutrient Harvesting Facility and supporting basins and pump
stations at the McAlpine Creek WWMF. Major components of the project include a Final Dewatering
Centrate Equalization Feed Pump Station,a Final Dewatering Centrate Equalization Basin,a Final
Dewatering Centrate Reactor Feed Pump Station,and a Nutrient Harvesting Facility.The Nutrient
Harvesting Facility will house an Ostara Pearl®reactor and supporting processes including a
dewatering and drying system,storage silo and bagger,and chemical storage and feed.The project
also includes modifications to existing yard piping,replacement of yard piping,and on-site roadway
modifications.The project will be constructed via the progressive design-build project delivery
method.
Charlotte Water entered into a public-private-partnership (P3) contract with Evoqua Water
Technologies to design,construct,operate,and maintain their Ostara Pearl®system after issuing a
Request for Qualifications in 2019. Equivalent products are therefore not listed in Section 466383 -
Nutrient Recovery System-Ostara Pearl as required by North Carolina General Statue 133-3.
The construction timeline for the project is summarized below:
• October 2024-anticipated notice to proceed
• October 2027-anticipated final completion
WATER+ENVIRONMENT+TRANSPORTATION+ENERGY+FACILITIES

CDM
Smith
NPDES Complex Permitting Unit
April 26, 2024
Page 2
The following attachments are included as part of this application:
• Application for Authorization to Construct Form and Attachment(Section 1)
• Engineering Calculations (Section 2)
• Auxiliary Power Documentation (Section 3)
• Effluent Limitations from NPDES Permit(Section 4)
• Engineering Plans and Specifications
• CD containing digital copies of Sections 1 through 4,the Engineering Plans and Specifications,
and a copy of the Basis of Design Report(previously submitted to DWR in September of
2022)
A check in the amount of$1,000 is enclosed as payment of the application fee.
Please review the application and let me know if you have any questions. Thank you for your
assistance.
Sincerely,
-z t
John Brinkley, P.E.,B EE,D.WRE
Senior Project Manager
CDM Smith Inc.
cc: Hussein Sadek,Charlotte Water
Carl Wilson,Charlotte Water
Project File (1363-264915)

SECTION 1
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Section 1
Application for Authorization to Construct Form

State of North Carolina
Department of Environmental Quality
Division of Water Resources
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 143-215.1,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:http://portal.ncdenr.org/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 Charlotte Water
Signature authority's name per 15A NCAC 02T.0106(b) Joseph C.Wilson,P.E.
Signature authority's title Chief Engineer
Complete mailing address 5100 Brookshire Boulevard,Charlotte,NC 28216
Telephone number 704-391-5169
Email address [e-mail]
B. PROFESSIONAL ENGINEER
Professional Engineer's name John Brinkley,P.E.,BCEE,D.WRE
Professional Engineer's title Senior Project Manager
North Carolina Professional Engineer's License No. NCO25066
Firm name CDM Smith
Firm License number F-1255
Complete mailing address 5400 Glenwood Avenue,Suite 400,Raleigh,NC 27612
Telephone number [phone]
Email address [e-mail]
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT(FORM ATC 10-23) Page 1

State of North Carolina
DWRDepartment of Environmental Quality
Division of Water Resources
Division of Water Resources APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
C. NPDES PERMIT
NPDES Permit number NC0024970 da l OA'1
Current Permitted flow(MGD)—include permit 64 MGD
flow phases if applicable
D. PROJECT DESCRIPTION
Provide a brief description of the project:Project includes construction of a new Nutrient Harvesting Facility and supporting
basins and pump stations at the McAlpine Creek.Major components of the project include a Final Dewatering Centrate
Equalization Feed Pump Station,a Final Dewatering Centrate Equalization Basin,a Final Dewatering Centrate Reactor Feed
Pump Station,and a Nutrient Harvesting Facility.The Nutrient Harvesting Facility will house an Ostara Pearl®reactor and
supporting processes including a dewatering and drying system,storage silo and bagger,and chemical(magnesium oxide and
citric acid)storage and feed.The project also includes modifications to existing yard piping,replacement of yard piping,and on-
site roadway modifications.
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.
O If any of the requirements of 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 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.
O Not Applicable.
E. Engineering Plans
O 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.
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT(FORM ATC 10-23) Page 2

State of North Carolina
DWR =40' Department of Environmental Quality
Division of Water Resources
Division of Water Resources APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
® 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.
® 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):
0 Civil 0 Not Applicable
0 Process Mechanical 0 Not Applicable
® Structural 0 Not Applicable
O Electrical 0 Not Applicable
O Instrumentation/Controls 0 Not Applicable
O Architectural 0 Not Applicable
O Building Mechanical 0 Not Applicable
O Building Plumbing 0 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.
0 Are any modifications proposed that impact the process flow diagram or process flow schematic of the treatment facility? El
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 for bidding and construction of the proposed project(check as appropriate):
® Civil 0 Not Applicable
® Process Mechanical 0 Not Applicable
® Structural 0 Not Applicable
® Electrical 0 Not Applicable
® Instrumentation/Controls 0 Not Applicable
Z Architectural 0 Not Applicable
® Building Mechanical 0 Not Applicable
El Building Plumbing 0 Not Applicable
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT(FORM ATC 10-23) Page 3

State of North Carolina
DINRDepartment of Environmental Quality
Division of Water Resources
Division of Water Resources APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
El 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.
G. Construction Sequence Plan
® 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:Engineering Specifications Section
013513.24 (Special Procedure for MOPO and Construction Sequence) and Engineering Plans Sheet CD-2 (Construction
Sequence).
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.B.2 of this form were determined.
❑ Pollutant loading for each treatment unit demonstrating how the design effluent concentrations in Section 4.B.2 of this form
were determined.
0 Hydraulic loading for each treatment unit.
O 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.
O Supporting documentation that the specified auxiliary power source is capable of powering all essential treatment units.
I. Permits
El Provide the following information for each permit and/or certification required for this project:
Permit/ If Not Issued Provide
Not Date Date Certification Status and Expected
Permit/Certification Applicable Submitted Approved Number Issuance Date
Dam Safety h
Soil Erosion and Sediment Control 02n9n024 Within 30 days of submission
USCOE /Section 404 Permit X
Water Quality Certification(401) X
USCOE/Section 10 X
Stormwater Management Plan X
CAMA X
NCDOT Encroachment Agreement X
Railroad Encroachment Agreement X
Other:City/County Building
o be sub Permits-to be obtained by rs er 2024
contractor
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT(FORM ATC 10-23) Page 4

State of North Carolina
DWR r Department of Environmental Quality
Division of Water Resources
Division of Water Resources APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
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.
❑ 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.
0 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 MGD
Current NPDES Permit Limit MGD
Current Annual Average MGD
(past 12 months)
For Past 12 Months: For Past 24 Months:
Start Date:month/yr Start Date:month/yr
End Date:month/yr End Date:month/yr
Maximum Month MGD MGD
Maximum Day MGD MGD
Peak Hour MGD MGD
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT(FORM ATC 10-23) Page 5

State of North Carolina
DWRDepartment of Environmental Quality
Division of Water Resources
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 143-215.1,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
Parameter Available [Section 3.H]) [Section 3.H]) Load (monthly average)
Ammonia Nitrogen mg/L Summer 1.0 mg/L Summer
(NH3-N) mg/L mg/L lb/day
mg/L Winter 1.9 mg/L Winter
Biochemical mg/L Summer 4 mg/L Summer
Oxygen Demand mg/L mg/L lb/day
(BOD5) mg/L Winter 8 mg/L Winter
Fecal Coliform per 100 mL 200 per 100 mL
Nitrate+Nitrite
Nitrogen(NO3-N+ mg/L N/A mg/L
NO2-N)
Total Kjeldahl
mg/L
Nitrogen
mg/L N/A mg/L
Total Nitrogen
lb/year N/A lb/year
mg/L N/A mg/L
Total Phosphorus mg/L, mg/L lb/day
lb/year N/A lb/year
Total Suspended mg/L mg/L lb/day mg/L 15.0 mg/L
Solids(TSS)
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 :
Not applicable-project is for sidestream treatment only.No plant influent or effluent loadings were calculated as part of this
project,and design will not impact facility's ability to meet permit limits.
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT(FORM ATC 10-23) Page 6

State of North Carolina
D , R ,.,_
WDepartment of Environmental Quality
Division of Water Resources
Division of Water Resources APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
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:
5. Per 15A NCAC 02T.0505(k),multiple pumps shall be provided wherever pumps are used.Is this condition met by the
design? /1 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(q),the public shall be prohibited from access to the wastewater treatment facilities.Explain how
the design complies with this requirement:No modifications are proposed as part of this project.Public access to the
McAlpine Creek WWMF is prohibited by perimeter fencing and controls.
9. Is the treatment facility located within the 100-year flood plain? ®Yes or D No. If yes,describe how the facility is
protected from the 100-year flood: Portions of the existing site are located within 100-year floodplain.No facilities
constructed as part of this project will be located within the floodplain.
C. WASTEWATER TREATMENT UNIT AND MECHANICAL EQUIPMENT INFORMATION—COMPLETE
FOR NEW OR EXPANDING FACILITIES AND FOR MODIFIED TREATMENT UNITS
1. PRELIMINARY AND PRIMARY TREATMENT(i.e.,physical removal operations and flow equalization):
No.of Plan Sheet Specification Calculations
Treatment Unit Provided?
Units Type Size per Unit Reference Reference
(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

State of North Carolina
DWRDepartment of Environmental Quality
Division of Water Resources
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 organics and nutrients)
No.of Plan Sheet Specification Calculations
Treatment Unit Provided?
Units Type Size per Unit Reference Reference
(Yes or No)
Aerobic Zones/
Tanks gallons
Anoxic Zones/
Tanks gallons
Anaerobic
Zones/Tanks gallons
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
3. TERTIARY TREATMENT
No.of Plan Sheet Specification Calculations
Treatment Unit Provided?
Units Type Size per Unit Reference Reference
(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 NoL
gal/day per bank at peak
Ultraviolet Light (Parallel;in hourly flow; number of
banks; number of
series) 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

State of North Carolina
WDepartment of Environmental Quality
Division of Water Resources
Division of Water Resources APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
5. RESIDUALS TREATMENT
No.of Plan Sheet Specification Calculations
Treatment Unit Provided?
Units Type Size per Unit Reference Reference
(Yes or No)
Gravity Thickening square feet; ft side
Tank water depth
Mechanical
Thickening/ dry lb/hour
Dewatering
Aerobic Digestion gallons
Anaerobic
Digestion gallons
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 pumps)
Capacity
Location No.of Purpose Type of each Plan Sheet Specification
Pumps pump Reference Reference
GPM TDH
Final Dewatering Centrate conveyance Submersible solids
Centrate Equalization 2 to equalization handling 350 42 M-5,M-6 432513
Feed Pump Station
Final Dewating Centrate conveyance Submersible solids
Centrate Equalization 2 to reactors handling 350 116 M-7,M-9 432513
Basin •
Nutrient Harvesting 1 Reactor recycle Axial flow 11,000 2 M-10,M-11, 466383
Facility M-14
7. MIXERS
No.of Power of Plan Sheet Specification
Location Mixers Purpose Type each Mixer Reference Reference
(HP)
Final Dewating Centrate M 7,M 8,
Centrate 2 equalization tank Submersible impeller 4 M 9 464123
Equalization Basin mixers ,
MgO Makedown 2 MgO Makedown Top entry,axial flow 7.5 M-20,M-21 466383
Tanks
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT(FORM ATC 10-23) Page 9

State of North Carolina
DWRDepartment of Environmental Quality
/ Division of Water Resources
Division of Water Resources APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT(FORM ATC 10-23) Page 10

State of North Carolina
P
1R Department of Environmental Quality
Division of Water Resources
Division of Water Resources APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
8. BLOWERS
No.of Capacity of Plan Sheet Specification
Location Blowers Purpose Type each Blower Reference Reference
(CFM)
9. ODOR CONTROL
Location No. of Purpose Type Plan Sheet Specification
Units Reference Reference
*** SEE ATTACHMENT FOR SIDESTREAM TREATMENT UNITS AND EQUIPMENT INFORMATION
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 Requiremen
t met by the
Setback Parameter Design?If No ,identify
Treatment/Storage Setback Waivers in Item D.2
Unit Below
Any habitable residence or place of assembly under separate 100 tt ®Yes ❑No
ownership or not to be maintained as part of the project site
Any private or public water supply source 100 II ®Yes ❑No
Surface waters(streams—intermittent and perennial,perennial () I t ®Yes ❑ No
waterbodies,and wetlands)
Any well with exception of monitoring wells 100 It ®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 11

State of North Carolina
R
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,John Brinkley. P.E..BCEE,D.WRE,attest that this application package for an Authorization to Construct
(Typed Name of Professional Engineer)
for the McAlpine Creek WWMF Nutrient Harvesting Facility
(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.B.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 he subject to a future audit by the Division. Although
ccrtain 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.
l 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:
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APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT(FORM ATC 10-23) Pagc 12

State of North Carolina
DWRDepartment of Environmental Quality
Division of Water Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
SECTION 6: APPLICATION CERTIFICATION BY APPLICANT
Applicant's Certification per 15A NCAC 02T.0106(b):
I,Joseph C.Wilson.P.E..Chief Engineer,attest that this application package for an Authorization to Construct
(Typed Name of Signature Authority and Title)
for the McAlpine Creek WWMF Nutrient Harvesting Facility.
(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,re •esentation,or certification in any application package shall be guilty of a Class 2 misdemeanor,which
may include a fi not to exceed$10,000,as well as civil penalties up to$25,000 per viol ion.
Signature: !%`{f
/�� Date: �Z'Z
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 13

ATTACHMENT
SIDESTREAM TREATMENT UNIT AND MECHANICAL EOUIPMENT INFORMATION
FINAL DEWATERING CENTRATE EQUALIZATION BASINS(FDWCEN EQ BASINS)
Treatment No.of Plan Sheet Specification Calculations
Unit Units Type Size per Unit Provided?
Reference Reference
(Yes or No)
Equalization 32 ft x 24 ft, 10.75 ft M-7,M-8,
Basin 2 Rectangular side water depth M-9 Yes
CHEMICAL SYSTEMS—TANKS
No. of Plan Sheet Specification Calculations
Tank Provided?
Tanks Size per Tank Reference Reference
(Yes or No)
MgO Silo 1 12 ft diameter,60 tons M-13,M-22 466383 No
Mg0 8 ft diameter, 10 ft M-18,M-19,
Makedown 2 466383 No
side wall height M-20,M-21
Tanks
CHEMICAL SYSTEMS—PUMPS
Capacity of Calculations
Location No.of Purpose Type each pump Plan Sheet Specification Provided?
Pumps GPM TDH Reference Reference (j,
es or No)
Horizontal
Mg0 MgO centrifugal, M-18,
Makedown 2 80 65 M-19, 466383 No
Area Transfer open M-20,M-21
impeller _ .
1.67 134
Acid Feed 2 Acid Feed Diaphragm (100 (58 M18,M-22 466383 No
gph) psi)
PRODUCT PROCESSING
Plan Sheet Specification Calculations
Process No. Size per Unit Provided?
Reference Reference
(Yes or No)
1 Dryer 1 1,600 lbs/hr M-10,M-11, 466383 No
M-13,M-17
Conveyor 1 1,600 lbs/hr M-10,M-11, 466383 No
M-13,M-17
Storage Silo 1 36 tons M-10,M 11, 466383 No
M-13,M-17
PEARL NUTRIENT RECOVERY SYSTEM REACTOR
Plan Sheet Specification Calculations
Process No. Size per Unit Provided?
Reference Reference
(Yes or No)
Nutrient M-10,M-11,
Recovery 1 2.7 MGD M-12,M-14 466383 Yes
Reactor
1

SECTION 2
N
0
U

Section 2
Engineering Calculations

CDM
Smith
Engineering Calculations
Project
Charlotte Water
McAlpine Creek WWMF Nutrient Harvesting Facility
CDM Smith Project No. 1363-264915
Engineering Calculation Package Contents
1. Final Dewatering Centrate Equalization Basin Sizing
2. Pump Performance-System Analysis Calculations for Final Dewatering Centrate
Equalization Basin Feed Pump Calculations
3. Pump Performance-System Analysis Calculations for Reactor Feed Pumps
4. Ostara Pearl Reactor Sizing
.ct-0 CAR°,iii�,��
*el: ESSi y�
066
v<ict,
v0 •*F^/ F-
John W.A. Brinkley, PE
North Carolina License No. 025066

CDMCLIENT Charlotte Water JOB NO. 1363-264915(CDM Smith) DATE 2/18/2022Smith PROJECT McAlpine Creek WWMF DATE 2/22/2022 COMPUTED BY C Carden/ATL
Nutrient Harvesting Facility CHECKED
DETAIL Final Dewatering Centrate CHECKED J.Brinkley
Equalization Calculations BY
McAlpine Creek WWMF Nutrient Harvesting Facility
Final Dewatering Centrate Equalization Basin Sizing Calculations
Calculation Estimate the required capacity of the Final Dewatering Centrate Equalization Basins.There is a discrepancy between the
Description: anticipated operating schedules for Pre-Dewatering and Final Dewatering after THP has been implemented,and the Ostara
nutrient harvesting system requires both dewatering processes'centrate streams to be fed to the Pearl reactor at the same
time(i.e.,the reactor cannot operate on one centrate stream alone).The EQ basins are intended to hold Final Dewatering
centrate only,as its operating schedule is expected to be shorter than Pre-Dewatering,which is expected to operate on a 24/7
basis or close to it.
The operating strategy will be to discharge Final Dewatering centrate to the Ostara system at a rate that matches the operating
schedule for Pre-Dewatering.The Final Dewatering Centrate Equalization Basins are sized using a 24-hour flow balance,with
the maximum difference(delta)between the Pre-Dewatering and Final Dewatering operating hours serving as the basis for
sizina.
Initial Review By: J.Brinkley Date: 2/18/2022 Digital Signature:
Computed By: C.Carden Date: 2/18/2022 Digital Signature:
30%Design
Checked By: J.Brinkley Date: 2/22/2022 Digital Signature:
Final Review By: J.Brinkley Date: 2/22/2022 Digital Signature:
1.0 Contents(Description of Tabs)
1 Cover Sheet This sheet
2 Equalization Calculations Summary of centrate flows,operating hours,and calculation of equalization volume
1.1 Purpose/Objective: Determine the capacity of the Final Dewatering Centrate Equalization Basins.
1.2 Procedure/Approach: 1. Summarize the anticipated annual average and maximum month centrate flows and operating schedules from 2023 to 2040
from the McAlpine Creek WWMF solids mass balance.
2. For each year,calculate the difference(delta)between the Pre-Dewatering and Final Dewatering operating hours.
3. For the year in which the delta(positive or negative)is the greatest,perform a 24-hour flow simulation to calculate the Final
Dewatering centrate input and required output(flow rate and number of hours)from the Final Dewatering Centrate Equalization
Basin to match the operating schedule for Pre-Dewatering. Check to make sure the total 24-hour flows are similar to the
values in the centrate flows table.
4. Find the maximum resulting equalization tank level at maximum month conditions. This is the recommended volume of the
basins.
1.3 Data and References: 1. Centrate flows,dewatering operating schedules: PER-2-McAinine Creek WWMF Mass 8alance.xlsx
1.4 Assumptions 1. The existing WAS thickening process is expected to run only until THP is implemented. Due to the high volume of thickening
and Limitations: centrate produced for this relatively short time period,thickening centrate will not be sent to the NHF. Only Pre-Dewatering
and Final Dewatering centrate will be fed to the reactor.
2. The Pre-Dewatering centrate will not be stored;it will be pumped directly from the new Pre-Dewatering Building to be
constructed under a separate design-build project.

1.5 Legend: The following color codes are used in this spreadsheet.
Green shaded cell indicates that a manual input is required.
GranA shaded cell indicates a value that is old or not to be used.
No shadin. in a cell indicates a note,equation or result that does not require manual input.
1.6 Conclusions: 1. Based on the maximum operating schedule delta of 10.1 hours per day in the year 2034,the recommended tank volume is
125,000 gallons.
2.
3.
4.

Charlotte Water Project No.: 264915 Calculated by: CDC
McAlpine Creek WWMF Nutrient Harvesting Facility Checked by: J.Brinkley Date Calculated: 2/18/2022
Calculation of Centrate Equalization Basin Capacity Date Checked: 2/22/2022 Page: 1 of 4
Annual Average Centrate Flows
Projected Annual Average.*"`,'° A-"`"°"`w', Operating Hours
1 Thickenings Pre-DW&
Pre- Final Total Final &final. Pre- Final Final DW
Thickening Dewatering Dewatering Centrate {,,.°,„,„„,,,„,„,*,,^;,,.,a,,.,,,,,i, „ ,,, ,; Thickening Dewatering Dewatering Delta
Year gal/day gal/day gal/day gal/day gal/min gal/min gal/min hours/day hours/day hours/day hours/day
2023 970,994 0 306,791 1,277,785 674 306 980 24.0 0.0 16.7 n/a
2024 985,834 0 311,287 1,297,121 685 305 990 24.0 0.0 17.0 n/a
2025 1001,330 0 327,508 1,328,838 695 308 1,003 24.0 0.0 17.7 n/a
2026 0 1,274,938 159,205 1,434,144 0 170 170 0.0 20.2 15.6 4.6
2027 ® 1,292,712 161,355 1,454,067 0 170 170 ® 20.4 15.8 4.7
2028 0 1,564,617 201,137 1,765,754 0 170 170 0.0 17.1 19.7 2.6
2029 0 1,582,391 203,286 1,785,677 0 170 170 0.0 17.3 19.9 2.6
2030 0 1,600,165 205,435 1,805,600 0 170 170 0.0 17.5 20.1 2.7
2031 0 1,618,662 207,667 1,826,330 0 170 170 0.0 17.7 20.3 2.7
2032 0 1,637,160 209,899 1,847,059 0 170 170 0.0 17.8 20.6 2.7
2033 0 1,655,657 212,131 1,867,789 0 170 170 0.0 18.0 20.8 2.8
2034 0 1,674,155 214,363 1,888,518 0 170 170 0.0 18.2 21.0 2.8
2035 0 1,692,653 216,595 1,909,248 0 170 170 0.0 18.4 21.2 2.8
2036 0 1,788,891 230,537 2,019,429 0 170 170 0.0 19.6 22.6 3.0
2037 0 1,814,934 233,929 2,048,863 0 170 170 0.0 19.9 23.0 3.0
2038 0 1,840,977 237,320 2,078,297 0 170 170 0.0 20.2 23.3 3.1
2039 0 1,867,020 240,711 2,107,731 0 170 170 0.0 20.5 23.6 3.1
2040 0 1,893,063 244,102 2,137,165 0 170 170 0.0 20.8 24.0 3.1
Maximum Delta 4.7
hours/day
in 2027

Project No.: 264915 Calculated by: CDC
Checked by: J.Brinkley Date Calculated: 2/18/2022
Date Checked: 2/22/2022 Page: 2 of
Equalization Tank Flow Simulation at Annual Average Centrate Flows
Enter Year 2027 <-year of maximum delta between pre-DW and final oW operating hours
.is EQ Tank Level(gallons)
Pre- Final Final
Dewatering Dewatering Dewatering
Centrate to Centrate to Centrate to
NHF EQ Tank NHF Start of End of
Hour gallons gallons gallons Hour Hour
1 0 10,217 0 0 10,217
2 0 10,217 0 10,217 20,434
3 0 10,217 0 20,434 30,651
4 0 10,217 0 30,651 40,868
5 63,219 10,217 7,891 40,868 43,194
6 63,219 10,217 7,891 43,194 45,520
7 63,219 10,217 7,891 45,520 47,846
8 63,219 10,217 7,891 47,846 50,172
9 63,219 10,217 7,891 50,172 52,498
10 63,219 10,217 7,891 52,498 54,824
11 63,219 10,217 7,891 54,824 57,150
12 63,219 10,217 7,891 57,150 59,476
13 63,219 10,217 7,891 59,476 61,802
14 63,219 10,217 7,891 61,802 64,128
15 63,219 10,217 7,891 64,128 66,454
16 63,219 10,217 7,891 66,454 68,780
17 63,219 0 7,891 68,780 60,889
18 63,219 0 7,891 60,889 52,998
19 63,219 0 7,891 52,998 45,107
20 63,219 0 7,891 45,107 37,216
21 63,219 0 7,891 37,216 29,325
22 63,219 0 7,891 29,325 21,434
23 63,219 0 7,891 21,434 13,543
24 63,219 0 7,891 13,543 5,652
Daily Totals 1,264,389 163,472 157,819
Maximum EQ Tank Level(Annual Average) 68,780
gallons

Project No.: 264915 Calculated by: CDC
Checked by: J.Brinkley Date Calculated: 2/18/2022
Date Checked: 2/22/2022 Page: 3 of
Maximum Month Centrate Flows
Projected Annual Average Centrate Flows Operating Hours
Thickening Pre-DW&
Pre- Final Total Final &Final 1. Pre- Final Final DW
Thickening Dewatering Dewatering Centrate Thickenin- Rewateri.,. Dewaterin Thickening Dewatering Dewatering Delta
Year gal/day gal/day gal/day gal/day gal/min gal/min gal/min hours/day hours/day hours/day hours/day
2023 1,222,577 0 397,326 1,619,904 849 304 1,153 24.0 0.0 21.8 n/a
2024 1,241,568 0 403,231 1,644,800 862 304 1,167 24.0 0.0 22.1 n/a
2025 1,269,322 0 427,542 1,696,864 881 307 1,188 24.0 0.0 23.2 n/a
2026 0 1,634,573 207,013 1,841,585 0 169 169 0.0 17.6 20.4 2.8
2027 0 1,657,730 209,873 1,867,603 0 169 169 0.0 17.9 20.7 2.8
2028 0 2,006,001 266,441 2,272,442 0 345 345 0.0 22.3 12.9 9.5
2029 0 2,029,159 269,301 2,298,460 0 345 345 0.0 22.6 13.0 9.6
2030 0 2,052,316 272,161 2,324,478 0 345 345 0.0 22.8 13.1 9.7
2031 0 2,076,405 275,130 2,351,535 0 345 345 0.0 23.1 13.3 9.8
2032 0 2,100,494 278,099 2,378,593 0 345 345 0.0 23.3 13.4 9.9
2033 0 2,124,583 281,068 2,405,650 0 344 344 0.0 23.6 13.6 10.0
2034 0 2,148,671 284,036 2,432,708 C 344 344 0.0 23.9 13.7 10.1
2035 0 2,176,510 287,005 2,463,515 0 344 344 0.0 18.1 13.9 4.2
2036 0 2,301,533 305,125 2,606,658 0 344 344 0.0 19.3 14.8 4.5
2037 0 2,335,408 309,589 2,644,997 0 344 344 0.0 19.6 15.0 4.6
2038 0 2,369,283 314,053 2,683,336 0 344 344 0.0 19.9 15.2 4.6
2039 0 2,403,158 318,517 2,721,676 0 343 343 0.0 20.1 15.5 4.7
2040 0 2,437,034 322,981 2,760,015 0 343 343 0.0 20.4 15.7 4.8
Maximum Delta 10.1
hours/day
in 2034

Project No.: 264915 Calculated by: CDC
Checked by: J.Brinkley Date Calculated: 2/18/2022
Date Checked: 2/22/2022 Page: 4 of
Equalization Tank Flow Simulation at Maximum Month Centrate Flows
Enter Year 2034 <--year of maximum delta between pre-DW and final DW operating hours
Tei,.;'4"TiiiA em EQ Tank Level(gallons)
Pre- Final Final
Dewatering Dewatering Dewatering
Centrate to Centrate to Centrate to
NHF EQ Tank NHF Start of End of
Hour IIIMEMIEM gallons Hour Hour
1 90,026 20,659 11,901 0 8,758
2 90,026 20,659 11,901 8,758 17,516
3 90,026 20,659 11,901 17,516 26,274
4 90,026 20,659 11,901 26,274 35,031
5 90,026 20,659 11,901 35,031 43,789
6 90,026 20,659 11,901 43,789 52,547
7 90,026 20,659 11,901 52,547 61,305
8 90,026 20,659 11,901 61,305 70,063
9 90,026 20,659 11,901 70,063 78,821
10 90,026 20,659 11,901 78,821 87,578
11 90,026 20,659 11,901 87,578 96,336
12 90,026 20,659 11,901 96,336 105,094
13 90,026 20,659 11,901 105,094 113,852
14 90,026 20,659 11,901 113,852 122,610
15 90,026 0 11,901 122,610 110,709
16 90,026 0 11,901 110,709 98,808
17 90,026 0 11,901 98,808 86,908
18 90,026 0 11,901 86,908 75,007
19 90,026 0 11,901 75,007 63,106
20 90,026 0 11,901 63,106 51,205
21 90,026 0 11,901 51,205 39,305
22 90,026 0 11,901 39,305 27,404
23 90,026 0 11,901 27,404 15,503
24 90,026 0 11,901 15,503 3,602
Daily Totals 2,160,636 289,220 285,618
Maximum EQ Tank Level(Max Month) 122,610
gallons

CLIENT Charlotte Water JOB NO. 1363-264915
CDM_ PROJECT McAlpine Creek WMF Nutrient
Sin I t h Harvesting Facility
DETAIL Cover Signature Page
Pump Performance-System Analysis Calculations for
McAlpine Creek WMF Nutrient Harvesting Facility
Centrate EQ Feed Pumps
1
initial Review By. Date: Digital Signature:
i
Computed By: I Date: Digital Sgnature.
10%Design __._-r_-._..___._-
Checked By: I Date: Die/tat Signature:
Final Review By. --_t Date: _ Digital Signature:
Initial Rev**By - Tate: Digital Signature
Computed By/ 1Date: uigrtal Signature:
30%Design
Checked By: - Date: Digital Signature
I
Final Reviev:By: Date:. /Digit lSignaturm
Initial Review By: L.Schaich Date. 11/16/2023 Digital Signature: L.Schaich
Computed By: K.Allen Date: 11/21/2023 Digital Signature: K.Allen
60%Design:
Checked By: I.Holowell Date: 12/5/2023 Digital Signature: I.Holowell
Final Review By: J.Brinkley Date: 12/B/2023 Digital Signature: J.Brinkley
Initial Review 0y Date. Distal Siguatui e i
Computed Ey: Date: Digital Signature:
30%Design ----FL—
,.._..a.._...
Chi eked By: IDa:a: Digital Signature 1
t __ _— I
Final Review By. Date Digital Signature.
Initial Review By: Date: Digital Signature:
' Computed By: Date. Digital Signature:
Final Issued for Bid:
IChecked By: /Date: Digital Signature.
I --{!
I fir al Review By-
_..1- lOate - Digit 1Signature:

C DI1/1 CLIENT Charlotte Water JOB NO. 1363-264915 DATE 11/21/23
PROJECT McAlpine Creek WMF Nutrient COMPUTED BY KVA
Sm't� Harvesting Facility DATE CHECKED 12/5/23
DETAIL Cover Sheet CHECKED BY IDH SHEET NO. 1
Pump Performance-System Analysis Calculations for
McAlpine Creek WMF Nutrient Harvesting Facility
Centrate EQ Feed Pumps
Station Description: Centrate equalization pump station consists of two(1 duty+1 standby)submersible pumps.Discharge elevation at the equalization basin is 576.00 feet.Invert elevation of wetwell influent pipe
from dewatering centrifgues is 552.95 feet.Set design water elevation in wet well at 552.00 feet since pumps will be equipped with VFDs.Equip pumps with VFDs.Pump speed will be controlled
based on maintaining a liquid level with a deadband of+/-2 foot.Pump flow range will be 150 gpm to 350 gpm.Grade elevation is—565.00 feet.
1.0 Contents 1 Cover Sheet 6 NSPH at Low Head Condition
2 Equations 7 NSPH at High Head Condition
3 Pump Data 8 NPSH at Design Head Condition
4 System Data 9 Hydraulic Model-Schematic
5.A Affinity Data-Scenario 1 10 Hydraulic Model-Components
5.8 Pump System Curves-Scenario 1
5.0 Affinity Data-Scenario 2
5.D Pump System Curves-Scenario 2
1.1 Purpose/Objective: 1.Determine system head requirements for pumps and select pumps that match those conditions.
2.Run NPSH and submergence check on pumps.
1.2 Procedure/Approach: 1.Enter pump performance data(flow,head,efficiency,and NPSHr).
2.Enter system hydraulic information for each scenario(System Data tab).
3.Select pumps operating to develop curve plot(Affinity tabs).
4.Review and update pump-system curves(Pump System Curves tabs).
1.3 Data and References: 1.Hydraulic Institute Engineering Data Book Second Edition:77-78.Hydraulic Institute 1999
2.Model:
EQ Basin Feed Pump Model.fth
3.Hydraulic Takeoff:
EQ Basin Feed Pump 60%Take-Offs for Hydraulic Model PS ELEVATION LOWERED.udf
4.Pump Curves
EQ Feed Pumps Submersible.Sulzer,pd(
fO Feed Pumps.Submersible.Flvet.odf
4.Miscellaneous Reference Materials
Reference Materials
1.4 Assumptions and 1.Pumps in wet well will operate continuously during the dewatering process to convey centrate to the EQ basins.They will be level controlled.
Limitations: 2.Final dewatering operating schedule is estimated as follows:
Annual average conditions-1 unit in service up to 24 hours/day,7 days/week
Max month conditions-2 units in service up to 16 hours/day,7 days/week.
3.Dewatering centrate has a very low solids percentage,so 1%solids was used for conservative Sanks results.
1.5 Legend: The fallowing text and cell color codes are used in this spreadsheet and indicate the following:
'blue shaded cell=value that requires manual input
text black text=notes,equations,and results that do not need updating for typical calculations
,---text green text with arrow=notes,assumptions,or references to data sources
text red text=notes specific to the template;should be deleted/hidden in final calcs

CD CLIENT Charlotte Water JOB NO. 1363-264915 11/21/23
McAlpine Creek WMF Nutrient
Sm i
t hM PROTECT DATE CHECKED 12/5/23 COMPUTEDDATE BY KVA
Harvesting Facility
DETAIL Equations CHECKED BY IDH SHEET NO. 2
This sheet summarizes the key equations used in this calculation brief.
Affinity Laws
1.Flow at reduced speed: 2.Head at reduced speed:
J 2
Qi _ ni HI _ nl
Q1 n , H2 n
Where: Where:
Q1=Full speed flow(gpm) Hi=Full speed head(ft)
Qz=Reduced speed flow(gpm) Hz=Reduced speed head(ft)
n1=Full speed(rpm) n1=Full speed(rpm)
n1=Reduced speed(rpm) nz=Reduced speed(rpm)
Net Positive Suction Head(NPSH)
1.Net Positive Suction Head available:
NPSHa =Hbar+Hstat—Hvap—Hf
Where:
NPSH,= Net Positive Suction Head Available(ft)
Hya,= Barometric Pressure(ft)
H..= Static Suction Head(ft)
H,,,o= Fluid Vapor Pressure(ft)
HI= Suction Friction Losses(ft)

CLIENT Charlotte Water
McAlpine Creek WMF Nutrient JOB NO. 1363-264915 DATE 11/21/23
S tar1 t h PROJECT DATE CHECKED 2/5/23 COMPUTED BY KVA
Harvesting Facility
DETAIL Pump Data CHECKED BY IDH SHEET NO. 3
Pump Curve Inputs
Instructions:Enter up to eight different pump Curves in the tables below.In the following section,you will select which pump curve to use for up to 8 pumps in a system.Note that the head range must be the same for all pumps to be used in any one scenario.
Pump Curve 1 1 Pump Curve 2 Pump Curve 3 Pump Curve 4
Manf: Sulzer(Initial Selection) Man/: Flygt/Xylem(Initial Selection) Manf: Sulzer(Updated Selection) Manf: Flygt/Xylem(Updated Selection)
Model: %FP BOC COO Model: NP3102 Model: OP 100E CB1 Model: NP3102
Motor: 4.69 hp Motor: 5 hp Motor: 4.69 hp Motor: 5 hp
Speed: 1730 rpm Speed: 1760 rpm Speed: 1176 rpm Speed: 1760 rpm
Impeller: 7.0625 in Impeller: 6.4 in Impeller: 9.0625 in Impeller: 6.77 in
MCSF: 65 gpm MCSF: gpm MCSF: 64 gpm MCSF: gpm
Flow(gpm) Head(ft) Eff NPSHr(ft) Flow(gpm) Head(ft) Eff NPSHr(ft) Flow(gpm) Head(ft) Eff NPSHr(ft) Flow(gpm) Head(ft) Eff NPSHr(ft)
0 52.0 0.0% 5.58 0 44.8 D.D% 11.06 0 49.6 0.0% 1.86 0 52.5 0.0% 16.26
100 44.6 35.5% 5.03 100 38.5 33.5% 10.34 100 41.2 35.8% 3.15 100 45.6 35.6% 15.53
150 41.9 46.6% 5.15 150 35.9 44.4% 10.24 150 38.8 47.3% 3.56 150 42.6 47.4% 15.38
200 38.9 54.6% 5.61 200 33.5 52.6% 10.15 200 37.1 55.9% 3.9 200 39.9 _ 55.9% 15.28
250 36.0 60.2% 6.45 250 31.2 58,6% 10.05 250 35.6 61.9% 4.26 250 37.3 61.9% 15.18
300 33.3 64.0% 7.73 300 29.0 62.7% 9.95 300 34.0 65.9% 4.71 300 34.9 65.8% 15.12
350 30.8 66.5% 9.45 350 26.8 65.2% 9.95 350 32.3 68.5% 5.33 350 32.6 68.6% 15.06
400 28.2 66.2% 11.89 400 24.6 66.2% 10.03 400 30.3 69.5% 6.19 400 30.2 70.0% 15.17
450 25.4 65.2% 14.63 450 22.3 65.8% 10.36 450 28.1 70.4% 7.36 450 27.9 70,5% 15.46
500 22.5 62.6% 18.14 500 19.9 64.0% 10.92 500 25.6 69.9% 8.94 500 25.4 69.3% 16.05
Pump Curve 5 Pump Curve 6 Pump Curve 7 Pump Curve 8
Manf: Sulzer)Fall 2023 Selection) Manf: Flygt/Xylem IFall 2023 Selection) Mart Manf:
Model: XFP 80C C61 Model: NP3127 HT Model: Model:
Motor: 7.5 hp Motor: 7.5 hp Motor: hp Motor: hp
Speed: 1760 rpm Speed: 1750 rpm Speed: rpm Speed: rpm
Impeller: in _Impeller: 7.7 in Impeller: in Impeller: in
MCSF: gpm MCSF: gpm MCSF: gpm MCSF: gpm
Flow(gpm) Head(ft) Eff NPSHr(ft) Flow Igpm) Head(ft) Eff NPSHr(ft) Flow(gpm) Head(ft) Eff NPSHr(ft) Flow(gpm) Head(ft) Eff NP5Hr(ft)
0 62.6 0.0% 3.8 0 65.0 0.0% 15.2
100 56.0 30.2% 4.2 100 56.8 27.9% 13.8
150 53.2 40.6% 4.5 ISO 53.3 36.6% 13.2
200 50.4 48.5% 5 200 50.0 43.3% 12.8
250 47.9 54.5% 5.5 250 469 47.9% 12.4
300 45.4 58.8% 6 300 43.8 50.7% 12.1
350 43.0 61.9% 6.7 350 40.7 52.3% 11.7
400 40.5 63.9% 7.5 400 37.8 53.0% 11.5
450 38.0 65.0% 8.3 450 34.9 53.096, 11.3
500 35.4 65.3% 9.2 500 32.2 52.4% 11.2

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CDR,' CLIENT Charlotte Water JOB NO. 1363-264915 DATE 11/21/23
smith PROIEC MCAlpine Creek WMF Nutrient Harvesting Facility DATE CHECKED 12/5/23 COMPUTED BY KVA
DETAIL System Data CHECKED BY IDH SHEET N0. 4
Scenario Name: Scenario 1 (Sulzer) -One Pump,Sanks 1%Solids
System Curve ID= Low Head System Curve ID= IDesign Head System Curve ID= !High Head System Curve ID=
at System Description: System Description: System Description: System Description:
> Low head on the suction side is defined as the invert of the overflow pipe in Design head on the suction side is the design water level,552.00.Design head High head on the suction side is defined as the minimum submergence of the
s- Brief description of system variables-suction and discharge elevations,flow
3 the basin,EL 552.61.Low head on the discharge side is defined as the invert on the discharge side is defined as if the standpipe entering the EQ basin is pumps,EL 547.5.High head on the discharge side is defined as the overflow rate,etc.
U of the standpipe entering the EQ basin,EL 575.75. flowing full,EL 576.25. elevation in the EQ basin,EL 576.50.
NModel File Name: EQ Basin Feed Pump Model Model File Name: EQ Basin Feed Pump Model Model File Name: Model File Name Model File Name: Model File Name
I Pump,Low Head,350 GPM,Sanks 1 Pump,Design Head,350 GPM, 1 Pump,High Head,350 GPM,Sanks
CO Model Scenario: 1 Model Scenario: Sanks 1% Model Scenario: 1% Model Scenario: Model Scenario Name from Model File
f Suction WSE or HGL(ft)= 552.6 Suction WSE or HGL(ft).
552.0 Suction WSE or HGL(ft)= 547.5 Suction WSE or HGL(ft).
O Discharge WSE or HGL(ft). 575.8 Discharge WSE or HGL(ft). 576.3 Discharge WSE or HGL(ft)= 576.5 Discharge WSE or HGL(ft).
E Static Head(ft). 23.1 Static Head(ft). 24.3 Static Head(ft). 29.0 Static Head(ft)= 0.0
M
• Pipe Friction Coefficient= 150 Pipe Friction Coefficient= 120 Pipe Friction Coefficient= 120 Pipe Friction Coefficient=
>v Flow from model(gpm)= 350 Flow from model(gpm)= 350 Flow from model(gpm)= 350 Flow from model)gpm)
V) TH from Model(ft)= 34.6 TH from Model(ft)= 37.3 TH from Model(ft)= 42.1 TH from Model((Li
Friction Head)Hf)= 11.5 Friction Head(Hf)= 13.1 Friction Head(Hf)= 13.1 Friction Head(Hf)= 0.0
Percent of Flow Head Flow Head Flow Head Flow Head
Modeled Flow )gpm) (ft) (gpm) IN) (gpm) Ifs) Igpm) Ift)
0% 0 23 0 24 0 29 0 #DIV/01
10% 35 23 35 24 35 29 0 #DIV/0I
20% 70 24 70 25 70 30 0 3010/01
30% 105 24 105 26 105 30 0 #DIV/01
40% 140 25 140 27 140 31 0 8DIV/01
50% 175 26 175 28 175 33 0 #DIV/DI
60% 210 28 210 29 210 34 0 8013/01
70% 245 29 245 31 245 36 0 #DIV/0!
80% 280 31 280 33 280 38 0 8013/01
90% 315 33 315 35 315 40 0 #DIV/01
100% 350 35 350 37 350 42 0 #DIV/01
120% 420 39 420 43 420 47 0 #01V/01
140% 490 45 490 49 490 53 0 0010/01
150% 525 47 525 52 525 57 0 6010/01
Scenario Name: Scenario 2(Flygt/Xylem)-One Pump,Sanks 1%Solids
System Curve ID= Low Head System Curve ID= IDesign Head System Curve ID= 'High Head System Curve ID= I
tL System Description: System Description: System Description: System Description:
` Low head on the suction side is defined as the invert of the overflow pipe in Design head on the suction side is the design water level,552.00.Oesign head High head on the suction side is defined as the minimum submergence of the
3 the basin,EL 552.61.Low head on the discharge side is defined as the invert on the discharge side is defined as if the standpipe entering the EQ basin is pumps,EL 547.5.High head on the discharge side is defined as the overflow
✓ of the standpipe entering the EQ basin,EL 575.75. flowing full,EL 576.25. elevation in the EQ basin,EL 576.50.
0 Model File Name: EQ Basin Feed Pump Model Model File Name: EQ Basin Feed Pump Model Model File Name. Model File Name Model File Name:
1 Pump,Low Head,350 GPM,Sanks 1 Pump,Design Head,350 GPM, 1 Pump,High Head,350 GPM,laths
CO Model Scenario:
1% Model Scenario:
Sanks 1% Model Scenario:
1% Model Scenario:
fop Suction WSE or HGL(ft). 552.6 Suction WSE or HGL(ft). 552.0 Suction WSE or HGL(ft)= 547.5 Suction WSE or HGL(ft).
CI Discharge WSE or HGL(ft)= 575.8 Discharge WSE or HGL(ft). 576.3 Discharge WSE or HGL(ft)= 576,5 Discharge WSE or HGL Ift)=
E Static Head(ft). 23.1 Static Head(ft). 24.3 Static Head(ft)= 29.0 Static Head(ft)= 0.0
Y Pipe Friction Coefficient= 150 Pipe Friction Coefficient= 120 Pipe Friction Coefficient= 120 Pipe Friction Coefficient=
VI
Flow from model(gpm)= 350 Flow from model(gpm)= 350 Flow from model)gpm)= 350 Flow from model(gpm)=
VI TH from Model(ft)= 34.6 TH from Model(ft). 37.3 TH from Model(ft)= 42.1 TH from Model(ft)=
Friction Head(Hf)= 11.5 Friction Head(Hf1= 13.1 Friction Head(Hf)= 13.1 Friction Head(HI)= 0.0
Percent of Flow Head Flow Head Flow Head Flow Head
Modeled Flow (gpm) Ift) (gpm) Ift) Wm) tel Igpm) IN)
0% 0 23 0 24 0 29 0 #DIV/01
10% 35 23 35 24 35 29 0 0010/01
20% 70 24 70 25 70 30 0 #210/01
30% 105 24 105 26 105 30 0 #DIV/D!
40% 140 25 140 27 140 31 0 4DIV/0!
50% 175 26 175 28 175 33 0 #DIV/01
60% 210 28 210 29 210 34 0 0010/01
70% 245 29 245 31 245 36 0 8010/01
80% 280 31 280 33 280 38 0 #010/01
90% 315 33 315 35 315 40 0 0010/01
100% 350 35 350 37 350 42 0 8DIV/01
120% 420 39 420 43 420 47 0 8013/0!
140% 490 45 490 49 490 53 0 #010/0!
150% 525 47 525 52 525 57 0 8010/01

CLIENT Charlotte Water 108 NO. 1363-264915 DATE 11/21/23
CDM PROJECT McAlpine Creek WMF Nutrient DATE CHECKED 12/5/23 COMPUTED BY KVA
Sm i t h Harvesting Facility
DETAIL Scenario 1 Affinity Data CHECKED BY IDH SHEET NO. 5A
Scenario Name: Scenario 1 (Sulzer) -One Pump, Sanks 1%Solids
Pump Status
Instructions:Select pump status for this scenario.
Pump 1 I Pump 2 Pump 3 Pump 4
Pump 5 I Pump 6 Pump 7 Pump 8
Warnings:No warnings exist for this scenario.
Pump Affinity,Flow,and Efficiency Tables
Head,Flow,and Efficiency vs.Speed
100%Speed 95%Speed 90%Speed 85%Speed 80%Speed 75%Speed
Head Flow Head Flow Head Flow Head Flow Head Flow Head Flow
tel (RP.) EH NPSRr(ft) (ft) (gpm) Elf (ft) (Rpm) Elf (ft) jgpml Eff (ft) (gpm) Elf (ft) (gPm) Elf
63 0 0% 3.8 56 0 0% 51 0 0% 45 0 0% 40 0 0% 35 0 D%
56 100 30% 4.2 51 95 30% 45 90 30% 40 85 30% 36 80 30% 32 75 30%
53 150 41% 4.5 48 143 41% 43 135 41% 38 128 41% 34 120 41% 30 113 41%
50 200 49% 5 45 190 49% 41 180 49% 36 170 49% 32 160 49% 28 150 49%
48 250 55% 5.5 43 238 55% 39 225 55% 35 213 55% 31 200 55% 27 188 55%
45 300 59% 6 41 285 59% 37 270 59% 33 255 59% 29 240 59% 26 225 59%
43 350 62% 6.7 39 333 62% 35 315 62% 31 298 62% 28 280 62% 24 263 62%
41 400 64% 7.5 37 380 64% 33 360 64% 29 340 64% 26 320 64% 23 300 64%
38 450 65% 8.3 34 428 65% 31 405 65% 27 383 65% 24 360 65% 21 338 65%
35 500 65% 9.2 32 475 65% 29 450 65% 26 425 65% 23 400 65% 20 375 65%
70%Speed 65%Speed60%Speed 5%Speed 50%Speed
ry 5
Head Flow Eff Head Flow Eff Head Flow Eff Mead Flow Eff Head flow Eff
;_Ifti___ (gPm) (ft) (gem) (ft) [gam) Ift) (gpm) (ft) (gpm)
31 0 0% 26 0 0% 23 0 0% 19 0 0% 16 0 0%
27 70 30% 24 65 30% 20 60 3D% 17 55 30% 14 50 30%
26 105 41% 22 98 41% 19 90 41% 16 83 41% 13 75 41%
25 140 49% 21 130 49% 18 120 49% 15 110 49% 13 100 49%
23 175 55% 20 163 55% 17 150 55% 14 138 55% 12 125 55%
22 210 59% 19 195 59% 16 180 59% 14 165 59% 11 150 59%
21 245 62% 18 228 62% 15 210 62% 13 193 62% 11 175 62%
20 280 64% 17 260 64% 15 240 64% 12 220 649' 10 200 64%
19 315 65% 16 293 65% 14 270 65% 11 248 65% 1D 225 65%
37 350 65% 15 325 659/ 13 300 65% 11 275 65% 9 250 65%
Efficiency-Head Iso Lines
Speed 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50%
EH Head Head Head Head Head Head Head Head Head Head Head
(ft) (ft) (fy (HI (ft) (ft) (ftl MI Iftl Ift) (ft)
0% 63 56 51 45 40 35 31 26 23 19 16
30% 56 51 45 40 36 32 27 24 20 17 14
41% 53 48 43 38 34 30 26 22 19 16 13
49% 50 45 41 36 32 28 25 21 18 15 13
55% 48 43 39 35 31 27 23 20 17 14 12
59% 45 41 37 33 29 26 22 19 16 14 11
62% 43 39 35 31 28 24 21 18 15 13 11
64% 41 37 33 29 26 23 20 17 15 12 10
65% 38 34 31 27 24 21 19 16 14 11 10
65% 35 32 29 26 23 20 17 15 13 11 9
Efficiency-Flow Iso Lines
Speed 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50%
Flow Flow Flow Flow Flow Flow Flow Flow Flow Flow Flow
Eff. (gpm) (gpm) (gPm) (Rpm) (Rpm) IgPml (OM) (RPM) (gpm) (gpm) (gpm)
0% D 0 0 D 0 0 0 0 D 0 0
30% 100 95 90 85 80 75 70 65 60 55 50
41% 150 143 135 128 120 113 105 98 90 83 75
49% 200 190 180 170 160 150 140 130 120 110 100
55% 250 238 225 213 200 188 175 163 150 _ 138 125
59% 300 285 270 255 240 225 210 195 180 165 150
62% 350 333 315 298 280 263 245 228 210 193 175
64% 400 380 360 340 320 300 280 260 240 220 200
65% 450 428 405 383 360 338 315 293 270 248 225
65% 500 475 450 425 400 375 350 325 300 275 250

Scenario 1 (Sulzer) - One Pump, Sanks CDM
1% Solids Smith
70 -
0.2 MGD 0.5 MGD
4 100% o Operating Range ► High Head
..95%
41%
I 49% Design Head
50 _90% -/-- 55%
—
I I 59%
M / I 62% Low Head
1 / / / '
40 80% —I �_ ,_�__. —/ — 65%
v / / 65%
El / Rated Point
as
= ♦ ♦
30 -- 7(3% -rnieggel."00- -410011 ) —0--
-will*Vilialg ♦ ♦
65% / ♦ ♦
60%
♦C 20 1- y�55% / I / ♦
50% I ♦ ♦
♦ ♦ 0
♦
10 �__ ----------_________-___.----
Rated Operating Condition:
0.5mgd(350 gpm) at 37.3'TH
0 - I 1 i
0 100 200 300 400 500 600
Flow (gpm)

CLIENT Charlotte Water JOB NO. 1363-264915 DATE 11/21/23
CDM_ PROJECT McAlpine Creek Wad Nutrient DATE CHECKED 12/5/23 COMPUTED BY KVA
Smith Harvesting Facility
DETAIL Scenario 2 Affinity Data CHECKED BY IDH SHEET NO. SC
Scenario Name: Scenario 2 (Flygt/Xylem) -One Pump, Sanks 1%Solids
Pump Status
Instructions:Select pump status for this scenario.
Pump 1 ( Pump 2 Pump 3 Pump 4
Pump 5 Pump 6 Pump 7 Pump 8
Warnings:No warnings exist for this scenario.
Pump Affinity,Flow,and Efficiency Tables
Head,Flow,and Efficiency vs.Speed
100%Speed 95%Speed 90%Speed 85%Speed 80%Speed 75%Speed
Head Flow Head Flow Head Flow Head Flow Head Flow Head Flow
I%) IRPm) EH NPSKr(ft) (ft) (gpm) EH (ft) UP.) EH (ft) (BP.) Eff 00 I81.0 EH 00 UPm) EH
65 0 0% 15.2 59 0 0% 53 0 D% 47 0 0% 42 0 0% 37 0 0%
57 100 27% 13.8 51 95 27% 46 90 27% 41 85 27% 36 80 27% 32 75 27%
53 150 37% 13.2 48 143 37% 43 135 37% 39 128 37% 34 120 37% 30 113 37%
50 200 43% 12.8 45 190 43% 41 180 43% 36 170 43% 32 16D 43% 28 150 43%
47 250 48% 12.4 42 238 48% 38 225 48% 34 213 48% 30 200 48% 26 188 48%
44 300 51% 12.1 40 285 51% 35 270 51% 32 255 51% 28 240 51% 25 225 51%
41 350 52% 11.7 37 333 52% 33 _ 315 52% 29 298 52% 26 28D 52% 23 263 52%
38 400 53% 11.5 34 380 53% 31 360 53% 27 340 53% 24 320 53% 21 300 53%
35 450 53% 11.3 31 428 53% 28 405 53% 25 383 53% 22 360 53% 20 338 53%
32 5W 52% 11.2 19 475 52% 26 450 52% 23 425 52% 21 400 52% 18 375 52%
70%Speed 65%Speed 60%Speed 55%Speed 50%Speed
Ntad Flow Head Flow Head Flow Head Flow Head Flow
(HI IBpm) EH (0) (DPm) EH EH EH EH
Ift) lopre) (ft) lam) (ft) Wm)
32 0 0% 27 0 0% 23 0 0% 20 0 0% 16 0 0%
28 70 27% 24 65 27% 20 60 27% 17 55 27% 14 50 27%
26 105 37% 23 98 37% 19 90 37% 16 83 37% 13 75 37%
25 140 43% 21 130 43% 18 120 43% 15 110 43% 13 100 43%
23 175 48% 2D 163 48% 17 150 48% 14 138 489 12 125 48%
21 210 51% 19 195 51% 16 180 51% 13 165 51% 11 150 51%
20 245 52% 17 228 52% 15 210 52% 12 193 52% 10 175 52%
19 28D 53% 16 260 53% 14 24D 53% 11 220 53% 9 200 53%
17 315 53% 15 293 53% 13 270 53% 11 248 53% 9 225 53%
16 350 52% 14 325 52% 12 300 52% 10 275 52% 8 250 52%
EHlclency-Head!so lines
Speed 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50%
Err. Head Head Head Head Head Head Head Head Head Head Head
(ft) (HI Ift) (ft) (ft) (ft) (ft) let) Iftl (ft) Ift)
0% 65 59 53 47 42 37 32 27 23 20 16
27% 57 51 46 41 36 32 28 _ 24 20 17 14
37% 53 48 43 39 34 30 26 23 19 16 13
43% 50 45 41 36 32 28 25 21 18 15 13
48% 47 42 38 34 30 26 23 20 17 14 12
51% 44 40 35 32 28 25 21 19 16 13 11
52% 41 37 33 29 26 23 20 17 15 12 10
53% 38 34 31 27 24 21 19 16 14 11 9
53% 35 31 28 25 22 20 17 15 13 11 9
52% 32 29 26 23 21 18 16 14 12 10 8
Efficiency-Flow(so Lines
Speed 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50%
Eff. Flow Flow Flow flow Flow Flow Flow Flow Flow Flow Flow
lepm) (gpm) (gpm) )gPm) (gem) loom) (gpm) (Komi (gpm) (gyro) lRPm)
o% o 0 0 0 0 0 0 0 0 0 0
27% 100 95 90 85 80 75 70 65 60 55 50
37% 15D 143 135 128 120 113 105 98 90 83 75
43% 200 190 180 170 160 150 140 130 120 110 100
48% 250 238 225 213 200 188 175 163 150 138 125
51% 300 285 27D 255 24D 225 210 195 180 165 150
52% 350 333 315 298 280 263 245 228 210 193 175
53% 400 380 360 340 320 300 280 260 240 220 200
53% 450 428 405 383 360 338 315 293 270 248 225
52% 500 475 450 425 400 375 350 325 300 275 250

Scenario 2 (Flygt/Xylem) - One Pump, CDM
Sanks 1% Solids Smith
70
100% 0.2 MGD 0.5 MGD
4 Operating Range ► High Head
60 27%
95%. .
3;%
I Design Head
90% 43%
48% '
/ 51%
/ / Low Head
I / / /
. 80% /
40w.
El / / , 53%
cts / / / Rated Point 52%
= 70% ♦
65% �-41111.111".— / ♦ ♦ •
�_
60% / I ♦
/ / ♦ •
/ / ♦ ♦ /
•
50% / / / •♦ ♦
/ ♦ •
/ ♦
♦
♦ ♦ •
i
Rated Operating Condition:
0.5mgd (350 gpm)at 37.3'TH
0 - 1 1 I I 1
0 100 200 300 400 500 600
Flow (gpm)

CLIENT Charlotte Water JOB NO. 1363-264915 DATE 11/21/23
CDM_ CLIENT
McAlpine Creek WMF Nutrient DATE CHECKED 12/5/23 COMPUTED BV KVA
Sm I t Ii Harvesting Facility
DETAIL NPSH-Low Head CHECKED BY IDH SHEET NO. 6
Input the following information:
Notes
Altitude: 565 ft
Water Temperature: 70 F
Fluid Vapor Pressure: 0.890 ft (From Table below)
Pump Centerline Elev: 547.15 ft
High Suction WSE/HGL: 552.45 ft
Static Suction Head: 5.30 ft
Atmospheric Pressure: 33.30 ft (Pulled From Table below)
Specific Gravity:' 0.998 (Pulled From Table below)
Barometric Pressure: 33.37 ft
Suction Friction Losses:I 0.00Ift
NPSH Available:I 37.78 Ift
NPSHr Operating Range Motor Impeller
Flow Rate(gpm) (AOR or POR)
(ft) Horsepower Material
Sulzer(Fall 2023 Selection)-XFP 80C CB1: 7.8 422 AOR 8 Cast Iron
Flygt/Xylem(Fall 2023 Selection)-NP3127 HT: 11.5 400 AOR 8 Cast Iron
Margin: 26.28 ft
Required NPSH Margin Minimum: 4.9 ft (Input Value from Table 9.6.1.5.5 below)
Adequate Margin: YES
Margin Ratio: 3.28
Required NPSH Margin Ratio: 1.2 (Input Value from Table 9.6.1.5.5 below)
Adequate Margin Ratio: YES

CDM CLIENT Charlotte Water
McAlpine Creek WMF Nutrient JOB NO. 1363-264915 DATE 11/21/23
Sin�till PROTECT DATE CHECKED 12/5/23 COMPUTED BY KVA
Harvesting Facility
DETAIL NPSH-Low Head CHECKED BY IDH SHEET NO. 6
PROPERTIES OF WATER
Table 1 Table 2 Table 3 Table 4
Altitude Atmos. Altitude Atmos. Temp Abs.Vapor Specific Temp Abs.Vapor Specific
(m) Press.(m) (ft) Press.(ft) (C) Press(m) Gravity (F) Press(ft) _ Gravity
-304.8 10.73 -1000 35.2 0 0.61 1.000 60 0.59 0.999
-152.4 10.55 -500 34.6 5 0.87 1.000 70 0.89 0.998
0.0 10.34 0 33.9 10 1.23 1.000 80 1.20 _ 0.997
152.4 10.15 500 33.3 15 1.70 0.999 85 1.40 _ 0.996
304.8 10.00 1000 32.8 20 2.34 0.998 90 1.60 0.995
457.2 9.79 1500 32.1 25 3.17 0.997 100 2.20 0.993
609.6 9.60 2000 31.5 30 4.24 0.996 110 3.00 0.991
762.0 9.45 2500 31.0 40 7.38 0.999 120 3.90 0.989
914.4 9.27 3000 30.4 50 12.33 0.988 130 5.00 0.986
1066.80 9.09 3500 29.8 60 19.92 0.983 140 6.80 0.983
1219.20 8.90 4000 29.2 70 31.16 0.978 150 8.80 0.981
1371.60 8.78 4500 28.8 80 47.34 0.9718 160 11.2 0.977 _
1524.00 8.60 5000 28.2 90 70.1 0.9653 170 14.2 0.974
1676.40 8.41 5500 27.6 100 101.33 0.9584 180 17.8 0.970
1828.80 8.29 6000 27.2
1981.20 8.14 6500 26.7
2133.60 7.99 7000 26.2
2286.00 7.84 7500 25.7
2438.40 7.68 8000 25.2
2590.80 7.53 8500 24.7
2743.20 7.41 9000 24.3
2895.60 7.26 9500 23.8
3048.00 7.13 10000 23.4
4572.00 5.85 10500 19.2
Excerpt from ANSI/HI 9.6.1-2017 American National Standard for Rotodynamic Pumps-Guideline for NPSH Margin:
Able 9.6.1.5.5-NPSH margin,water/wastewater pumps
Type Power per Stage POR NPSH Margin Ratio AOR NPSH Margin Ratio
Pump kW(hp) [Margin Minimum] [Margin Minimum]
Wastewater 1.1 1.2
<45(60)
(cast-iron impeller) [1.0 m(3.3 ft)] [1.5 m(4.9 It)]
Wastewater <45(60) 1.05 1.1
(stainless-steel impeller) [1.0 m(3.3 ft)] [1.5 m(4.9 ft)]
Wastewater 245(60) 1.2 1.3
(cast-Iron Impeller) (1.0 m(3.3 ft)] [1.5 m(4.9 ft)]
Wastewater 1.1 1.2
245(60)
(stainless-steel impeller) [1.0 m(3.3 ft)] [1.5 m(4.9 ft)]
Water 1.05 1.1
(stainless or aluminum-bronze <75(100) [1.0 m(3.3 t1)] [1.5 m(4.911))
impeller)
Water 1.1 1.2
(stainless or aluminum-bronze 275(100)Impeller) 11.0 m(3.3 ft)] [1.5 m(4.9 ftl]

CLIENT Charlotte Water JOB NO. 1363-264915 DATE 11/21/23
SCDM PROJECT McAlpine Charlotte
eeWater Nutrient DATE CHECKED 12/5/23 COMPUTED BY KVA
�' Harvesting Facility
DETAIL NPSH-High Head CHECKED BY IDH SHEET NO. 7
Input the following information:
Notes
Altitude: 565 ft
Water Temperature: 70 F
Fluid Vapor Pressure: 0.890 ft (From Table below)
Pump Centerline Elev: 547.15 ft
Low Suction WSE/HGL: 547.50 ft
Static Suction Head: 0.35 ft
Atmospheric Pressure: 33.30 ft (Pulled From Table below)
Specific Gravity: 0.998 (Pulled From Table below)
Barometric Pressure: 33.37 ft
Suction Friction Losses:I 0.00jft
NPSH Available:) 32.83 Ift
NPSHr Operating Range Motor Impeller
Flow Rate(gpm) (AOR or POR)
(ft) Horsepower Material
Sulzer(Fall 2023 Selection)-XFP 80C CB1: 6.8 357 AOR 8 Cast Iron
Flygt/Xylem(Fall 2023 Selection)-NP3127 HT: 11.8 340 AOR 8 Cast Iron
•
•
Margin: 21.03 ft
Required NPSH Margin Minimum: 4.9 ft (Input Value from Table 9.6.1.5.5 below)
Adequate Margin: YES
Margin Ratio: 2.78
Required NPSH Margin Ratio: 1.2 (Input Value from Table 9.6.1.5.5 below)
Adequate Margin Ratio: YES
I
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CDMt h CLIENT Charlotte Water JOB NO. 1363-264915 E 11/21/23
McAlpine Creek WMF Nutrient
S m i PROJECT DATE CHECKED 12/5/23 COMPUTEDDAT BY KVA
Harvesting Facility
DETAIL NPSH-High Head CHECKED BY IDH SHEET NO. 7
PROPERTIES OF WATER
Table 1 Table 2 Table 3 Table 4
Altitude Atmos. Altitude Atmos. Temp Abs.Vapor Specific Temp Abs.Vapor Specific
(m) Press.(m) (ft) Press.(ft) (C) Press(m) Gravity (F) Press(ft) Gravity
-304.8 10.73 -1000 35.2 0 0.61 1.000 60 0.59 0.999
-152.4 10.55 -500 34.6 5 0.87 1.000 70 0.89 0.998
0.0 10.34 0 33.9 10 1.23 1.000 80 1.20 0.997
152.4 10.15 500 33.3 15 1.70 0.999 85 1.40 0.996
304.8 10.00 1000 32.8 20 2.34 0.998 90 1.60 0.995
457.2 9.79 1500 32.1 25 3.17 0.997 100 2.20 0.993
609.6 9.60 2000 31.5 30 4.24 0.996 110 3.00 0.991
762.0 9.45 2500 31.0 40 7.38 0.999 120 3.90 0.989
914.4 9.27 3000 30.4 50 12.33 0.988 130 5.00 0.986
1066.80 9.09 3500 29.8 60 19.92 0.983 140 6.80 0.983
1219.20 8.90 4000 29.2 70 31.16 0.978 150 8.80 0.981
1371.60 8.78 4500 28.8 80 47.34 0.9718 160 11.2 0.977
1524.00 8.60 5000 28.2 90 70.1 0.9653 170 14.2 0.974
1676.40 8.41 5500 27.6 100 101.33 0.9584 180 17.8 0.970
1828.80 8.29 6000 27.2
1981.20 8.14 6500 26.7
2133.60 7.99 7000 26.2
2286.00 7.84 7500 25.7
2438.40 7.68 8000 25.2 1
2590.80 7.53 8500 24.7
2743.20 7.41 9000 24.3
2895.60 7.26 9500 23.8
3048.00 7.13 10000 23.4
4572.00 5.85 10500 19.2
Excerpt from ANSI/HI 9.6.1-2017 American National Standard for Rotodynamic Pumps-Guideline for NPSH Margin:
Table 9.6.1.5.5-NPSH margin,water/wastewater pumps
Type Power per Stage POR NPSH Margin Ratio AOR NPSH Margin Ratio
Pump KW(hp) [Margin Minimum] [Margin Minimum]
Wastewater 1.1 1.2
<45(60)
(casNron impeller) [1.0 m(3.3 ft)] [1.5 m(4.9 ft)]
Wastewater <45(60) 1.05 1.1
(stainless-steel impeller) [1.0 m(3.3 th] [1.5 m(4.9 ft)]
Wastewater 245(60) 1.2 1.3 '
(cast-Iron impeller) [1.0 m(3.3 III) [1.5 m(4.9 ft)] '
Wastewater 1.1 1.2
245(80)
(stainless-steel impeller) [1.0 m(3.3 MI [1.5 m(4.9 ft))
Water 1.05 1.1
(stemless or aluminum-bronze c75(100) [1.0 m(3.3 ft)] [1.5 m(4.9 ft))
impeller)
Water
(stainless or aluminumbronze 275(100) 1.1 1.2
Impeller) [1.0 m(3.3 ft)] [1.5 m(4.9 ftl]

CDMCLIENT Charlotte Water JOB NO. 1363-264915 DATE 11/21/23
_ PROJECT McAlpine Creek WMF Nutrient DATE CHECKED 12/5/23 COMPUTED BY KVA
Sm 1 Harvesting Facility
DETAIL NPSH-Design Head CHECKED BY IDH SHEET NO. 8
(
Input the following information:
Notes
Altitude: 565 ft
Water Temperature: 70 F
Fluid Vapor Pressure: 0.890 ft (From Table below)
Pump Centerline Elev: 547.15 ft
Design Suction WSE/HGL: 552.00 ft
Static Suction Head: 4.85 ft
Atmospheric Pressure: 33.30 ft (Pulled From Table below)
Specific Gravity: 0.998 (Pulled From Table below)
Barometric Pressure: 33.37 ft
Suction Friction Losses:I O.00Ift
NPSH Available:I 37.33 Ift Operating Range
NPSHr Flow Rate(gpm) (AOR or POR) Motor Impeller
(ft) Horsepower Material
Sulzer(Fall 2023 Selection)-XFP 80C CB1: 7.5" 396 AOR 8 Cast Iron
Flygt/Xylem(Fall 2023 Selection)-NP3127 HT: 11.6 376 AOR 8 Cast Iron
1
•
Margin: 25.73 ft
Required NPSH Margin Minimum: 4.9 ft (Input Value from Table 9.6.1.5.5 below)
Adequate Margin: YES '
Margin Ratio: 3.22
Required NPSH Margin Ratio: 1.2 (Input Value from Table 9.6.1.5.5 below)
Adequate Margin Ratio: YES
14
1

CDR!' CLIENT
PROJECT Charlotte Water
McAlpine Creek WMF Nutrient JOB NO. 1363-264915
DATE CHECKED 12/5/23 DATEDBY 11/21/23
'�IIKVA
Harvesting Facility
COMPUTE
DETAIL NPSH-Design Head CHECKED BY IDH SHEET NO. 8
PROPERTIES OF WATER
Table 1 Table 2 Table 3 Table 4
Altitude Atmos. Altitude Atmos. Temp Abs.Vapor Specific Temp Abs.Vapor Specific
(m) Press.(m) (ft) Press.(ft) (C) Press(m) Gravity (F) Press(ft) Gravity
-304.8 10.73 -1000 35.2 0 0.61 1.000 60 0.59 0.999
-152.4 10.55 -500 34.6 5 0.87 1.000 70 0.89 0.998
0.0 10.34 0 33.9 10 1.23 1.000 80 1.20 0.997
152.4 10.15 500 33.3 15 1.70 0.999 85 1.40 0.996
304.8 10.00 1000 32.8 20 2.34 0.998 - 90 1.60 0.995
457.2 9.79 1500 32.1 25 3.17 0.997 100 2.20 0.993
609.6 9.60 2000 31.5 30 4.24 0.996 110 3.00 0.991
762.0 9.45 2500 31.0 40 7.38 0.999 120 3.90 0.989
914.4 9.27 3000 30.4 50 12.33 0.988 130 5.00 0.986
1066.80 9.09 3500 29.8 60 19.92 0.983 140 6.80 0.983
1219.20 8.90 4000 29.2 70 31.16 0.978 , 150 8.80 0.981
1371.60 8.78 4500 28.8 80 47.34 0.9718 160 11.2 0.977
1524.00 8.60 5000 28.2 90 70.1 0.9653 170 14.2 0.974
1676.40 8.41 5500 27.6 100 101.33 0.9584 180 17.8 0.970
1828.80 8.29 6000 27.2
1981.20 8.14 6500 26.7
2133.60 7.99 7000 26.2
2286.00 7.84 7500 25.7
2438.40 7.68 8000 25.2
2590.80 7.53 8500 24.7
2743.20 7.41 9000 24.3
2895.60 7.26 9500 23.8
3048.00 7.13 10000 23.4
4572.00 5.85 10500 19.2
Excerpt from ANSI/HI 9.6.1-2017 American National Standard for Rotodynamic Pumps-Guideline for NPSH Margin:
Table 9.6.1.5.5-NPSH margin,water/wastewater pumps
Pump Type Power per Stage POR NPSH Margin Ratio AOR NPSH Margin Ratio
kW(hp) [Margin Minimum] [Margin Minimum]
Wastewater 1.1 1.2(60)
(cast-iron impeller) [1.0 m(3.3 ft)] [1.5 m(4.9 II)]
Wastewater <45(60) 1.05 1.1
(stainless-steel impeller) [1.0 m(3.3 ft)] [1.5 m(4.9 ft)]
Wastewater 1.2 1.3
245(60)
(cast-iron Impeller) [1.0 m(3.319] [1.5 m(4.9 ft)]
Wastewater 1.1 1.2
245(80)
(stainless-steel impeller) (1.0 m(3.3 ft)] [1.5 m(4.9 ft)]
Water 1.05 1.1
(stainless or aluminum-bronze <75(100) [1.0 m(3.3 8)] [1.5 m(4.911)]
impeller)
Water 1.1 1.2
(stainless or aluminum-bronze 275(100) [1.0 m(3.3 ft)] [1.5 m 14.9 NI]
Impeller)

CLIENT Charlotte Water lOB NO. 1363-264915 DATE 11/21/23
CDM PROJECT McAlpine Creek WMF Nutrient DATE CHECKED 12/5/23 COMPUTED BY KVA
Smith Harvesting Facility
DETAIL Submergence Check CHECKED BY IDH SHEET NO. 9
Determine minimum water depth in wet-well to avoid vortexing and entraining air:
Note:minimum pump submergence is determined per ANSI/HI 9.8-2018.
S=(1+2.3*F)*D
S=Min.submergence,inches.
F=Froude number.===>F=v/(g*D)D.6
D=Bell diameter of suction pipe.
v=Inlet velocity of bell,fps
g=32.2 ft/s2
Rated Pump Capacity 360 gpm
Suction Pipe Diameter 6 in.
Inlet Velocity 4.0 fps(Max.Velocity 5 ft/s per HI Stds.)
Froude Number 0.99 Dimensionless
Thereotical Minimum Submergence 20 inches
Manufacturer Minimum Submergence 12 inches «Flygt
Manufacturer Minimum Submergence 7= 12 inches «Sulzer
1

CDM CLIENT Charlotte Water
McAlpine Creek WMF Nutrient JOB NO. 1363-264915 DATE 11/21/23
sm t h PROJECT DATE CHECKED 12/5/23 COMPUTED BY KVA
Harvesting Facility
DETAIL Hydraulic Model-Schematic CHECKED BY IDH SHEET NO. 10
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SECTION 3
' 1
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Section 3
Auxiliary Power Documentation

Southeastern Consulting Engineers, Inc.
February 12, 2024
Ori Tuvia
Environmental Engineer
NC DEQ/Division of Water Resources/Water Quality Planning.
Reference: Charlotte Water—McAlpine Creek WWTP—Nutrient Harvesting Facility
ATC Documentation—Generator Sizing Calculation
Dear Ori:
The generator sizing details for the subject project are as follows:
The existing McAlpine Creek WWTP Delivery No. 2 has a peak electrical load of 4544kW per Duke Energy
prior to recently complete projects. See APPENDIX A—McAlpine LOI. Recently completed projects bring
the estimated peak electrical load to 6188kW.
In the Nutrient Harvesting Facility (NHF) project,the final electrical design will add an additional 597kW
to the existing plant peak load.See APPENDIX B—NHF load list.
The total plant peak load at completion of the NHF project is calculated by adding the existing utility
peak load (including recently completed projects)of 6188kW to additional designed peak load in this
project of 597kW. Therefore, the total peak load at the plant will be 6785kW at the completion of the
NHF project.
Delivery No. 2 has three (3) 2620kW generators which provide a total standby power capacity of
7860kW. This is greater than the anticipated peak load of 6785kW and therefore is adequately sized to
power all delivery 2 loads at peak loading conditions.
The associated generator switchgear will detect any loss to the normal utility power and activate the
generators to provide standby power all delivery 2 loads.
If you have any questions or need additional information, please do not hesitate to give us a call.
Sincerely, ,, ...............
R
SOUTHEAS ERN CO SU,' INEERS, INC. ;=Q'.0-5 S/0y•*
a SEAL f 9-
By ��
Michael 18918 '''
Pres'. v 0 ' Gf NF 'C
MCD/Ic
2.-U.-
600 MINUET LANE P.O. BOX 240436 CHARLOTTE, NC 28224
PHONE: [phone] FAX: [phone]

APPENDIX A

From: Daugherty,Jeff<[e-mail]>
Sent: Friday, May 20, 2022 10:10 AM
To: Mike Dougherty<[e-mail]>; Lee, Kim Austin<[e-mail]>;Williams,
Scott<Scott.Williams2Pduke-energy.com>
Cc: Hunnicutt,Travis<[e-mail]>
Subject: RE: [EXT]RE: [EXTERNAL] FW: McAlpine LOI
Ok sport fans. Finally getting down to the tale of the tape. Scott is now fully confident the peak
values I am about to present are accurate for past peak of both Del 1 & 2. Thanks again for the
data Scott.
Del 1 Peak Load
2566 KW @ 0.85 pf 2/16/21
Del 2 Peak Loads
4544 KW @ 0.88 pf 1/3/2020
3917 KW @ 0.85 pf 3/21/202
For Del 2, you immediately notice that two plus years ago the peak was higher, not sure what
caused that but if you have the same machines/devices connected and active now as you had
then,then I'm thinking we use the higher 2020 peak, but I'm also thinking we use the higher
power factor of 88%since several other sub peaks were recorded during that time and these
peaks also carried a similar power factor.

APPENDIX B

MCC-NHF Load Summary
Equipment Load (Amps)
Direct MCC-NHF Loads 435 A
25%of Largest Motor 31 A
Future Direct MCC-NHF Loads 200 A
Total Lighting Panel Loads 110 A
Future Lighting Panel Loads 40 A
816 A
Total
,597 kW at 0.88 pf

SECTION 4
C-
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U
4D

Section 4
Effluent Limitations from NPDES Permit

DocuSign Envelope ID:4FA71507-9D49-4824-8602-EB7D42FD9EA9
Permit NC0024970
PART I
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [64.0 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System[15A NCAC 08G .0302]
(a.) During the period beginning on the effective date of the permit and lasting until permit expiration,the
permittee is authorized to discharge treated municipal and industrial wastewater from Outfall 001. Such
discharges shall be limited and monitored'by the permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER
Parameter Code Monthly Weekly Daily Measurement Sample Type Sample
Average Average Maximum Frequency Location
Flow 50050 64.0 MGD Continuous Recordin Influent or
g Effluent
Total Monthly Flow(MG) 82220 Monitor and Report Monthly Recorded or Influent or
Calculated Effluent
CBOD,5-day(20°C)2 80082 4.0 mg/L 6.0 mg/L 2/Week 3 Composite Influent and
(April 1-October 31) Effluent
CBOD,5-day(20°C)280082 8.0 mg/L 12.0 mg/L 2/Week 3 Composite Influent and
(November 1-March 31) Effluent
Total Suspended Solids 2 C0530 15.0 mg/L 22.5 mg/L 2/Week 3 Composite Influent and
Effluent
NH3 as N(April 1-Oct 31) C0610 1.0 mg/L 3.0 mg/L 2/Week 3 Composite Effluent
NH3 as N(Nov 1-Mar 31) C0610 1.9 mg/L 5.7 mg/L 2/Week 3 Composite Effluent
Fecal Coliform 31616 200/100 mL 400/100 mL 1000/100 mL 2/Week 3 Grab Effluent
(geometric mean)
pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent
Dissolved Oxygen 00300 Daily Average>6.0 mg/L Daily Grab Effluent
Conductivity(µmhos/cm) 00094 Monitor and Report Daily Grab Effluent
Temperature(°C) 00010 Monitor and Report Daily Grab Effluent
Total Residual Chlorine 4 50060 17 µg/L Daily Grab Effluent
Total Nitrogen C0600 Monitor and Report Monthly Calculated Effluent
(NO2+NO3+TKN) (mg/L)
TKN (mg/L) 00625 Monitor and Report Monthly Composite Effluent
NO3-N+NO2-N (mg/L) 00630 Monitor and Report Monthly Composite Effluent
Total Phosphorus(mg/L) C0665 Monitor and Report Monthly Composite Effluent
Daily TP Load 5'7 QD665 1,067 lb/day Monthly Calculated Effluent
Monthly TP Load(lb/mo)5'7 QM665 Monitor and Report Monthly Calculated Effluent
12-Month TP Load(lb/yr)5'7 QM665 Monitor and Report Monthly Calculated Effluent
Combined 12-Month TP RA665 See Conditions A.(7)and A.(8) MonthlyCalculated Effluent
Load(lb/day)6'7 (
Chronic Toxicity 8 TGP3B Monitor and Report Quarterly Composite Effluent
Hardness-Total as CaCO3 00900 Monitor and Report Quarterly Composite Effluent
(mei-)
PFAS variable Footnote 9 Footnote 9 Grab Effluent
1,4-Dioxane(1g/L)10 82388 Monitor and Report Monthly10 Grab Effluent
Effluent Pollutant Scan NC01 Monitor and Report Footnote 11 Footnote I I Effluent
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system.
See Special Condition A.(13.).
2. The monthly average effluent CBOD5 and Total Suspended Solids concentrations shall not exceed 15%of the respective
influent value(85%removal).
Footnotes continue on the next page.
Page 3 of 18

DocuSign Envelope ID:4FA71507-9D49-4824-8602-EB7D42FD9EA9
Permit NC0024970
Footnotes continued from A.(1.)Effluent Limitations and Monitoring Requirements [64.0 MGD]:
3. Twice per week sampling must occur on any two non-consecutive days during the calendar week.
4. The facility shall monitor TRC when using chlorination for disinfection.The Division shall consider all effluent total
residual chlorine values reported below 50 µg/1 to be in compliance with the permit. However,the permittee shall
continue to record and submit all values reported by a North Carolina certified laboratory(including field certified),even
if these values fall below 50 µg/l.
5. The requirements for Monthly TP Load(lb/mo,QM665),Daily TP Load(lb/day,QD665),and 12-Month TP Load
(lb/yr,QY665)apply to discharges from this McAlpine Creek WWMF.These parameters are defined in Condition A.(8)
of this permit.
6. The Permittee is also subject to a Combined TP Load limit(lb/day,RA665)on the combined discharges from the
McAlpine Creek,Sugar Creek,and Irwin Creek facilities in accordance with Conditions A.(7.)and A.(8.).
7. All TP Load values shall be calculated and reported as specified in this Condition and Conditions A.(7.)and A.(8.).
8. Chronic Toxicity(Ceriodaphnia dubia)P/F at 90%with testing in March,June,September,and December.See Special
Condition A.(6.).
9. See Special Condition A.(10.).
10. Samples will be analyzed and reported using sufficiently sensitive test procedures(i.e.,methods)approved under 40
CFR part 136 for the analysis of pollutants or pollutant parameters.After a 24-month sampling period,the Permittee may
request the Division conduct a review of submitted data for assessment and approval of a 1,4-dioxane monitoring
frequency reduction from monthly to quarterly.
11. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition A.(9.).
(b.)There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 18

SnthDM