HomeMy WebLinkAbout2022 04 25 Public Hearing 400 - Wastewater/Reclaimed Water Master Plan | East and West WRF Conceptual Design Reports (Resolutions 2022-08; 2022-09; 2022-10) + , PUBLIC HEARINGS AGENDA ITEM 400
CITY COMMISSION AGENDA I APRIL 25, 2022 REGULAR MEETING
TITLE
Wastewater/Reclaimed Water Master Plan I East and West WRF Conceptual
Design Reports
SUMMARY
The Public Works and Utilities Department requests that the City Commission hold a
Public Hearing to consider the 2022 Wastewater and Reclaimed Water Master Plan,
East Water Reclamation Facility(WRF) Conceptual Design Report and West Water
Reclamation Facility(WRF) Conceptual Design Report. Following presentations and
consideration of the 2022 Wastewater and Reclaimed Water Master Plan, West Water
Reclamation Facility Conceptual Design Report, and East Water Reclamation Facility
Conceptual Design Report, the Public Works and Utilities Department requests the City
Commission, by separate vote for each resolution individually, adopt each of the
following:
• RESOLUTION NUMBER 2022-08: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the Wastewater Master
Plan for the implementation of the East and West Water Reclamation Facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
• RESOLUTION NUMBER 2022-09: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the conceptual design
report for the implementation of the West Water Reclamation facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
• RESOLUTION NUMBER 2022-10: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the conceptual design
report for the implementation of the East Water Reclamation facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
Wastewater and Reclaimed Water Master Plan: The 2022 Wastewater and
Reclaimed Water Master Plan identifies capacity limitations within the wastewater
system, reclaimed water system, and provides recommended time-phased
improvements to meet future demands in the City of Winter Springs'wastewater and
1
reclaimed water service areas. This Master Plan is intended to serve as the
foundational planning document identifying, prioritizing, and aligning future
improvements with the City's Capital Improvement Plan (CIP), the projects necessary to
meet the projected future demands of the City's wastewater collection, wastewater
treatment, and reclaimed water systems. The City presently owns and operates two
water reclamation facilities (WRF), along with three reclaimed water storage and
pumping facilities. Wastewater is delivered to the WRFs from an extensive gravity pipe
system, with direct pumping to the facilities supplied by 51 lift stations through
pressurized force mains. The reclaimed water system currently operates 6 disposal
sites, and an extensive residential irrigation system. The plan identifies and prioritizes
improvements based on the current operational condition of existing collection,
transmission, conveyance, treatment, disposal infrastructure, and where deficiencies
have a potential to develop as projected growth is realized within the service area.
West Water Reclamation Facility Conceptual Design Report: The West Water
Reclamation Facility Conceptual Design Report(CDR) is based on a comprehensive
assessment of the facility which is currently permitted for 2.07 million gallons per day
(MGD)Annual Average Daily Flow (AADF) by the Florida Department of Environmental
Protection. Currently the facility experiences flows at approximately half this capacity.
The West WRF was originally installed in the 1980s and has consequently reached the
end of its useful operational life, requiring both replacement and modernization.
Based on thorough engineering assessments, growth considerations, and the current
condition of the facility, this CDR focuses on the replacement of the West WRF, and
concludes that while some existing infrastructure may be rehabilitated and serve on a
temporary basis, no major components have a permanent value worth restoring for
permanent use. The specific object of this effort is to conceptualize a resilient, reliable
new facility capable of meeting current and future water quality requirements while
planning for growth and expansion to meet future demands and increasingly stringent
regulatory requirements over decades to come. This CDR outlines the process leading
to selection of the best suited treatment alternative, conceptual design, and site
layout. This CDR also provides planning level conceptual Capital, and Operations and
Maintenance (O&M) costs for construction of a facility sized to meet the City's needs
over the next 20 years, while readily capable of expansion to meet future quality-
Advanced Wastewater Treatment (AWT) regulations and quantity requirements if and
when necessary.
East Water Reclamation Facility Conceptual Design Report: The East Water
Reclamation Facility Conceptual Design Report(CDR) is based on a comprehensive
assessment of the facility which is currently permitted for 2.012 million gallons per day
(MGD)Annual Average Daily Flow (AADF) by the Florida Department of Environmental
Protection. Currently the facility experiences flows at approximately half this capacity.
The East WRF was originally installed in the mid-1970s and early 1990's and has
consequently reached the end of its useful operational life, requiring both
replacement and modernization. Based on thorough engineering assessments,
growth considerations, and the current condition of the facility, this CDR focuses on
the replacement of the East WRF, and concludes that while some existing
2
infrastructure may be rehabilitated and serve on a temporary basis, no major
components have a permanent value worth restoring for permanent use. The specific
object of this effort is to conceptualize a resilient, reliable new facility capable of
meeting current and future water quality requirements while planning for growth and
expansion to meet future demands and increasingly stringent regulatory
requirements over decades to come. This CDR outlines the process leading to
selection of the best suited treatment alternative, conceptual design, and site layout.
This CDR also provides planning level conceptual Capital, and Operations and
Maintenance (O&M) costs for construction of a facility sized to meet the City's needs
over the next 20 years, while readily capable of expansion to meet future quality-
Advanced Wastewater Treatment (AWT) regulations and quantity requirements if and
when necessary.
RECOMMENDATION
Staff requests the City Commission, consider and, by separate vote, adopt each of the
following:
• RESOLUTION NUMBER 2022-08: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the Wastewater Master
Plan for the implementation of the East and West Water Reclamation Facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
• RESOLUTION NUMBER 2022-09: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the conceptual design
report for the implementation of the West Water Reclamation facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
• RESOLUTION NUMBER 2022-10: A resolution of the City Commission of the City
of Winter Springs, Florida, relating to the Florida Department of Environmental
Protection (FDEP) State Revolving Fund (SRF), adopting the conceptual design
report for the implementation of the East Water Reclamation facility
improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
3
• PUBLIC HEARINGS AGENDA
CITY COMMISSION
1959
MONDAY, APRIL 25, 2022 1 REGULAR MEETING
TITLE:
Wastewater/Reclaimed Water Master Plan I East and West WRF Conceptual Design Reports
SUMMARY:
The Public Works and Utilities Department requests that the City Commission hold a Public Hearing to consider
the 2022 Wastewater and Reclaimed Water Master Plan, East Water Reclamation Facility (WRF) Conceptual
Design Report and West Water Reclamation Facility (WRF) Conceptual Design Report. Following presentations
and consideration of the 2022 Wastewater and Reclaimed Water Master Plan, West Water Reclamation
Facility Conceptual Design Report, and East Water Reclamation Facility Conceptual Design Report, the Public
Works and Utilities Department requests the City Commission, by separate vote for each resolution
individually, adopt each of the following:
• RESOLUTION NUMBER 2022-08: A resolution of the City Commission of the City of Winter Springs,
Florida, relating to the Florida Department of Environmental Protection (FDEP) State Revolving Fund
(SRF), adopting the Wastewater Master Plan for the implementation of the East and West Water
Reclamation Facility improvements; providing for the repeal of prior inconsistent resolutions,
severability, and an effective date.
• RESOLUTION NUMBER 2022-09: A resolution of the City Commission of the City of Winter Springs,
Florida, relating to the Florida Department of Environmental Protection (FDEP) State Revolving Fund
(SRF), adopting the conceptual design report for the implementation of the West Water Reclamation
facility improvements; providing for the repeal of prior inconsistent resolutions, severability, and an
effective date.
• RESOLUTION NUMBER 2022-10: A resolution of the City Commission of the City of Winter Springs,
Florida, relating to the Florida Department of Environmental Protection (FDEP) State Revolving Fund
(SRF), adopting the conceptual design report for the implementation of the East Water Reclamation
facility improvements; providing for the repeal of prior inconsistent resolutions, severability, and an
effective date.
BACKGROUND:
Wastewater and Reclaimed Water Master Plan: The 2022 Wastewater and Reclaimed Water Master Plan
identifies capacity limitations within the wastewater system, reclaimed water system, and provides
recommended time-phased improvements to meet future demands in the City of Winter Springs'
wastewater and reclaimed water service areas.This Master Plan is intended to serve as the foundational
planning document identifying, prioritizing, and aligning future improvements with the City's Capital
Improvement Plan (CIP), the projects necessary to meet the projected future demands of the City's
wastewater collection, wastewater treatment, and reclaimed water systems.The City presently owns and
operates two water reclamation facilities (WRF), along with three reclaimed water storage and pumping
facilities.Wastewater is delivered to the WRFs from an extensive gravity pipe system, with direct pumping
to the facilities supplied by 51 lift stations through pressurized force mains.The reclaimed water system
currently operates includes 6 disposal sites, and an extensive residential irrigation system.The plan
identifies and prioritizes improvements based on the current operational condition of existing collection,
transmission, conveyance,treatment, and disposal infrastructure, and where deficiencies have the potential
to develop as projected growth is realized within the service area.
4
West Water Reclamation Facility Conceptual Design Report: The West Water Reclamation Facility
Conceptual Design Report (CDR) is based on a comprehensive assessment of the facility which is currently
is permitted for 2.07 million gallons per day (MGD)Annual Average Daily Flow (AADF) by the Florida
Department of Environmental Protection. Currently the facility experiences flows at approximately half
this capacity. The West WRF was originally installed in the 1980s and has consequently reached the end of
its useful operational life, requiring both replacement and modernization. Based on thorough engineering
assessments, growth considerations, and the current condition of the facility,this CDR focuses on the
replacement of the West WRF, and concludes that while some existing infrastructure may be rehabilitated
and serve on a temporary basis, no major components have a permanent value worth restoring for
permanent use. The specific object of this effort is to conceptualize a resilient, reliable new facility
capable of meeting current and future water quality requirements while planning for growth and
expansion to meet future demands and increasingly stringent regulatory requirements over decades to
come.This CDR outlines the process leading to selection of the best suited treatment alternative,
conceptual design, and site layout. This CDR also provides planning level conceptual Capital, and
Operations and Maintenance (O&M) costs for construction of a facility sized to meet the City's needs over
the next 20 years, while readily capable of expansion to meet future quality-Advanced Wastewater
Treatment(AWT) regulations and quantity requirements if and when necessary.
East Water Reclamation Facility Conceptual Design Report: The East Water Reclamation Facility
Conceptual Design Report (CDR) is based on a comprehensive assessment of the facility which is currently
is permitted for 2.012 million gallons per day (MGD)Annual Average Daily Flow (AADF) by the Florida
Department of Environmental Protection. Currently the facility experiences flows at approximately half
this capacity.The West WRF was originally installed in the mid-1970s and early 1990's and has
consequently reached the end of its useful operational life, requiring both replacement and
modernization. Based on thorough engineering assessments, growth considerations, and the current
condition of the facility, this CDR focuses on the replacement of the West WRF, and concludes that while
some existing infrastructure may be rehabilitated and serve on a temporary basis, no major components
have a permanent value worth restoring for permanent use. The specific object of this effort is to
conceptualize a resilient, reliable new facility capable of meeting current and future water quality
requirements while planning for growth and expansion to meet future demands and increasingly stringent
regulatory requirements over decades to come.This CDR outlines the process leading to selection of the
best suited treatment alternative, conceptual design, and site layout. This CDR also provides planning
level conceptual Capital, and Operations and Maintenance (O&M) costs for construction of a facility sized
to meet the City's needs over the next 20 years,while readily capable of expansion to meet future quality
-Advanced Wastewater Treatment(AWT) regulations and quantity requirements if and when necessary.
Public Hearings Agenda I Monday,April 25, 2022 1 Page 2 of 3
5
Attachments:
1. 2022 Wastewater and Reclaimed Water Master Plan
2. West Water Reclamation Facility Conceptual Design Report
3. East Water Reclamation Facility Conceptual Design Report
4. Resolution Number 2022-08
5. Resolution Number 2022-09
6. Resolution Number 2022-10
7. Wastewater Master Plan/Conceptual Design Report Presentation
Public Hearings Agenda I Monday,April 25,2022 1 Page 3 of 3
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, o
RESOLUTION NUMBER 2022-08
A RESOLUTION OF THE CITY COMMISSION OF THE CITY OF WINTER
SPRINGS, FLORIDA, RELATING TO THE FLORIDA DEPARTMENT OF
ENVIRONMENTAL PROTECTION (FDEP) STATE REVOLVING FUND
(SRF), ADOPTING THE WASTEWATER MASTER PLAN FOR THE
IMPLEMENTATION OF THE EAST AND WEST WATER RECLAMATION
FACILITY IMPROVEMENTS; PROVIDING FOR THE REPEAL OF PRIOR
INCONSISTENT RESOLUTIONS, SEVERABILITY,AND AN EFFECTIVE DATE.
WHEREAS, Florida Statutes provide for loans to local government agencies to
finance the design, and construction of wastewater facilities; and the Florida
Administrative Code requires the City Commission to formally adopt a facilities plan
outlining necessary wastewater facility improvements to comply with State of Florida
funding requirements;
WHEREAS, the City of Winter Springs intends to adopt more specific facilities
plans for both the East and West Water Reclamation Facilities; and
WHEREAS,the formal adoption of the proposed Master Plan is the first planning
step in the creation of the facilities plan required for the City of Winter Springs to
participate in the State Revolving Loan Fund Program;
WHEREAS, the City Commission of the City of Winter Springs, Florida agrees
with the findings and summary of necessary improvements as outlined in the Master Plan
for the purpose of designing and constructing Water Reclamation Facilities to replace the
existing East and West Water Reclamation Facilities;
NOW, THEREFORE, BE IT RESOLVED by the City Commission of the City
of Winter Springs, Florida as follows:
SECTION 1. FINDINGS
The foregoing findings are incorporated herein by reference and made a part hereof.
SECTION 2. ADOPTION OF MASTER PLAN.
The City of Winter Springs Florida, is authorized to and does hereby adopt the proposed
Master Plan, attached hereto as Exhibit A.
The City Manager is hereby designated as the authorized representative to provide the
assurances and commitments that will be required by the Master Plan.
The City Manager is hereby designated as the authorized representative to execute the
Master Plan which will become the foundation of all activities related to the wastewater
facility improvements. The City Manager is further authorized to represent the City in
41
carrying out the Master Plan. The City Manager is authorized to delegate responsibility to
appropriate City Staff to carry out technical, financial, and administrative activities
associated with the Master Plan.
The legal authority for adoption of this Master Plan is pursuant to the City Charter, City
Code of Ordinances, and the Laws of the State of Florida.
SECTION 3. REPEAL OF PRIOR INCONSISTENT RESOLUTIONS.
All Resolutions or part of Resolutions in conflict with any of the provisions of this
Resolution are hereby repealed.
SECTION 4. SEVERABILITY.
If any section or portion of a section of this Resolution proves to be invalid, unlawful, or
unconstitutional, it shall not be held to invalidate or impair the validity, force, or effect or
any other section or part of this Resolution.
SECTION S. EFFECTIVE DATE
This Resolution shall take effect upon its approval and adoption by the City Commission.
APPROVED AND ADOPTION THIS 25TH DAY OF APRIL,2022.
CITY COMMISSION
CITY OF WINTER SPRINGS,FLORIDA
KEVIN MCCANN,MAYOR (SEAL)
ATTEST: APPROVED AS TO FORM:
CHRISTIAN GOWAN,CITY CLERK ANTHONY A.GARGANESE,CITY ATTORNEY
42
RESOLUTION NUMBER 2022-09
A RESOLUTION OF THE CITY COMMISSION OF THE CITY OF WINTER
SPRINGS, FLORIDA, RELATING TO THE FLORIDA DEPARTMENT OF
ENVIRONMENTAL PROTECTION (FDEP) STATE REVOLVING FUND
(SRF), ADOPTING THE CONCEPTUAL DESIGN REPORT FOR THE
IMPLEMENTATION OF THE WEST WATER RECLAMATION FACILITY
IMPROVEMENTS; PROVIDING FOR THE REPEAL OF PRIOR INCONSISTENT
RESOLUTIONS,SEVERABILITY,AND AN EFFECTIVE DATE.
WHEREAS, Florida Statutes provide for loans to local government agencies to
finance the design, and construction of wastewater facilities; and the Florida
Administrative Code requires the City Commission to formally adopt a facilities plan
outlining necessary wastewater facility improvements to comply with State of Florida
funding requirements;
WHEREAS, the City of Winter Springs intends to adopt a more specific Facility
Plan for the West Water Reclamation Facility to apply for such financing; and
WHEREAS, the formal adoption of the proposed Conceptual Design Report for
the West Water Reclamation Facility is intended to guide the creation and preparation of
the Facility Plan required for the City of Winter Springs to participate in the State
Revolving Loan Fund Program and shall be the conceptual basis for the design and
construction of the West Water Reclamation Facility; and
WHEREAS, the City Commission of the City of Winter Springs, Florida agrees
with the findings and summary of necessary improvements as outlined in the Conceptual
Design Report for the purpose of designing and constructing a Water Reclamation Facility
to replace the existing West Water Reclamation Facility; and
NOW, THEREFORE, BE IT RESOLVED by the City Commission of the City
of Winter Springs, Florida as follows:
SECTION 1. FINDINGS
The foregoing findings are incorporated herein by reference and made a part hereof.
SECTION 2. ADOPTION OF THE CONCEPTUAL DESIGN REPORT.
The City of Winter Springs Florida, is authorized to and does hereby adopt the proposed
Conceptual Design Report for the West Water Reclamation Facility, attached hereto as
Exhibit A.
The City Manager is hereby designated as the authorized representative to provide the
assurances and commitments that will be required by the Conceptual Design Report.
43
The City Manager is hereby designated as the authorized representative to execute the
Conceptual Design Report, which, in conjunction with the Wastewater Master Plan
adopted via Resolution 2022-08, will become the foundation of all activities related to the
wastewater facility improvements. The City Manager is further authorized to represent the
City in carrying out the Conceptual Design Report. The City Manager is authorized to
delegate responsibility to appropriate City Staff to carry out technical, financial, and
administrative activities associated with the Conceptual Design Report.
The legal authority for adoption of this Conceptual Design Report is pursuant to the City
Charter, City Code of Ordinances, and the Laws of the State of Florida.
SECTION 3. REPEAL OF PRIOR INCONSISTENT RESOLUTIONS.
All Resolutions or part of Resolutions in conflict with any of the provisions of this
Resolution are hereby repealed.
SECTION 4. SEVERABILITY.
If any section or portion of a section of this Resolution proves to be invalid, unlawful, or
unconstitutional, it shall not be held to invalidated or impair the validity, force, or effect or
any other section or part of this Resolution.
SECTION 5. EFFECTIVE DATE
This Resolution shall take effect upon its approval and adoption by the City Commission.
APPROVED AND ADOPTION THIS 25TH DAY OF APRIL,2022.
CITY COMMISSION
CITY OF WINTER SPRINGS,FLORIDA
KEVIN MCCANN,MAYOR (SEAL)
ATTEST: APPROVED AS TO FORM:
CHRISTIAN GOWAN,CITY CLERK ANTHONY A.GARGANESE,CITY ATTORNEY
44
RESOLUTION NUMBER 2022-10
A RESOLUTION OF THE CITY COMMISSION OF THE CITY OF WINTER
SPRINGS, FLORIDA, RELATING TO THE FLORIDA DEPARTMENT OF
ENVIRONMENTAL PROTECTION (FDEP) STATE REVOLVING FUND
(SRF), ADOPTING THE CONCEPTUAL DESIGN REPORT FOR THE
IMPLEMENTATION OF THE EAST WATER RECLAMATION FACILITY
IMPROVEMENTS; PROVIDING FOR THE REPEAL OF PRIOR INCONSISTENT
RESOLUTIONS,SEVERABILITY,AND AN EFFECTIVE DATE.
WHEREAS, Florida Statutes provide for loans to local government agencies to
finance the design, and construction of wastewater facilities; and the Florida
Administrative Code requires the City Commission to formally adopt a facilities plan
outlining necessary wastewater facility improvements to comply with State of Florida
funding requirements;
WHEREAS, the City of Winter Springs intends to adopt a more specific Facility
Plan for the East Water Reclamation Facility to apply for such financing; and
WHEREAS, the formal adoption of the proposed Conceptual Design Report for
the East Water Reclamation Facility is intended to guide the creation and preparation of
the Facility Plan required for the City of Winter Springs to participate in the State
Revolving Loan Fund Program and shall be the conceptual basis for the design and
construction of the East Water Reclamation Facility; and
WHEREAS, the City Commission of the City of Winter Springs, Florida agrees
with the findings and summary of necessary improvements as outlined in the Conceptual
Design Report for the purpose of designing and constructing a Water Reclamation Facility
to replace the existing East Water Reclamation Facility; and
NOW, THEREFORE, BE IT RESOLVED by the City Commission of the City
of Winter Springs, Florida as follows:
SECTION 1. FINDINGS
The foregoing findings are incorporated herein by reference and made a part hereof.
SECTION 2. ADOPTION OF THE CONCEPTUAL DESIGN REPORT.
The City of Winter Springs Florida, is authorized to and does hereby adopt the proposed
Conceptual Design Report for the East Water Reclamation Facility, attached hereto as
Exhibit A.
The City Manager is hereby designated as the authorized representative to provide the
assurances and commitments that will be required by the Conceptual Design Report.
45
The City Manager is hereby designated as the authorized representative to execute the
Conceptual Design Report, which, in conjunction with the Wastewater Master Plan
adopted via Resolution 2022-08, will become the foundation of all activities related to the
wastewater facility improvements. The City Manager is further authorized to represent the
City in carrying out the Conceptual Design Report. The City Manager is authorized to
delegate responsibility to appropriate City Staff to carry out technical, financial, and
administrative activities associated with the Conceptual Design Report.
The legal authority for adoption of this Conceptual Design Report is pursuant to the City
Charter, City Code of Ordinances, and the Laws of the State of Florida.
SECTION 3. REPEAL OF PRIOR INCONSISTENT RESOLUTIONS.
All Resolutions or part of Resolutions in conflict with any of the provisions of this
Resolution are hereby repealed.
SECTION 4. SEVERABILITY.
If any section or portion of a section of this Resolution proves to be invalid, unlawful, or
unconstitutional, it shall not be held to invalidated or impair the validity, force, or effect or
any other section or part of this Resolution.
SECTION 5. EFFECTIVE DATE
This Resolution shall take effect upon its approval and adoption by the City Commission.
APPROVED AND ADOPTION THIS 25TH DAY OF APRIL,2022.
CITY COMMISSION
CITY OF WINTER SPRINGS,FLORIDA
KEVIN MCCANN,MAYOR (SEAL)
ATTEST: APPROVED AS TO FORM:
CHRISTIAN GOWAN,CITY CLERK ANTHONY A.GARGANESE,CITY ATTORNEY
46
4RArt.'
-�
y • ,�}.• l i, t Y'�i� *X. .tiff `
��L LyRSi •s . .
•-x ��.. � - •ti r 't t .f �p Ste. � a
FP
AV Arl
��NTEl4City of -r Springs
O� SA
East Water Reclamation
Incorporated
~ * G1
V CONCEPTUAL
■ DESIGN REPORT
A•
• ♦
Incorporated
1959
City of Winter Springs
East Water Reclamation Facility
CONCEPTUAL DESIGN REPORT
April 2022
This document is released for the
purpose of information exchange review
and planning only under the authority of
Brian J.Graham, April 2022,
State of FL PE No.44683.
48
EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
Contents
1.0 Introduction, Summary of Existing Facilities, and Wastewater Flow and
Load Projections 1
1.1 Introduction 1
1.2 Basis for Conceptual Design 1
1.3 Summary of Existing Facility 3
1.3.1 Existing Treatment Process and Effluent Disposal 3
1.3.2 Condition Assessment 5
1.3.3 Site Boundary and Contour Survey 5
1.3.4 Environmental Review 6
1.3.5 Odor Survey 8
1.3.6 Geotechnical Investigation 10
1.3.7 Wastewater Characterization and Population Flow Projections 10
1.3.8 Wastewater Flow and Loading Characterization 10
1.3.9 Population Projections 13
1.3.10 Proposed East WRF Design Capacity 14
2.0 Liquid Stream Alternatives Evaluation
2.1 Evaluation Overview 15
2.2 Selection of Liquid Stream Treatment Alternatives 15
2.2.1 Preliminary List of Potential Process Alternatives 16
2.2.2 Biological Nutrient Removal to Achieve AWT 18
2.2.3 Potential AWT Treatment Alternatives 19
2.3 Descriptions of Proposed AWT-Capable Treatment Alternatives 21
2.3.1 Five-Stage Activated Sludge BNR(5-Stage BNR) 21
2.3.2 Membrane Bioreactor 22
2.3.3 Sequencing Batch Reactor(SBR) 25
2.3.4 Aerobic Granular Sludge—AquaNereda® 27
2.3.5 Ballasted Activated Sludge—NuvodaTM 29
2.3.6 Integrated Fixed-Film Activated Sludge 31
2.4 Structured Decision Analysis 33
2.4.1 Process Evaluation Criteria and Sub-Criteria 33
2.4.2 Paired Comparison Results 35
APRIL 2022 I i
49
EAST WRF CONCEPTUAL DESIGN REPORT CITY OF WINTER SPRINGS
3.0 Shortlisted Alternatives Evaluation 37
3.1 Objectives 37
3.2 Conceptual Design Criteria 37
3.2.1 Influent Flows and Loads 37
3.2.2 Regulatory Requirements 40
3.3 5-Stage BNR Alternative("Buildout"Scenario:2.1 mgd with AWT) 40
3.3.1 Process Design 40
3.3.2 Conceptual Site Layout 45
3.3.3 Hydraulic Considerations 47
3.4 MBR Alternative("Buildout"Scenario: 2.1 mgd with AWT) 49
3.4.1 Process Design 49
3.4.2 Site Layout 54
3.4.3 Hydraulic Considerations 56
3.5 Common Processes and Shared Facilities 56
3.5.1 Odor Control Technology 56
3.5.2 Chemical Systems 56
3.5.3 Reclaimed Water Storage and Reject Storage 59
3.5.4 Solids Handling 60
3.5.5 Potential Industrial Load Influences 61
3.6 Conceptual Level Cost Estimates('Buildout"Scenario) 61
3.6.1 Cost Estimating Accuracy 61
3.6.2 No Action Alternative 61
3.6.3 BNR and MBR Capital Conceptual Cost Estimates 62
3.6.4 Annual O&M Conceptual Cost Estimates 62
4.0 Final Recommendation
4.1 Recommended Alternative 66
4.2 Recommended Plant Capacity and Treatment Standard 66
4.3 Recommended Conceptual Site Layout and Cost Estimate 67
4.4 Funding Considerations 70
4.4.1 SRF Funding 70
APRIL 2022 1 ii
50
EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
Appendices
AppendixA Existing WRF PFD
Appendix B East WRF Survey
Appendix C Ecological Assessment and FNAI Tracking List
Appendix D Odor Control Assessment
Appendix E CWSRF Planning Document Requirements Checklist
Tables
Table 1 East Permit Renewal Effluent Disposal Site/Water Quality Requirements
Request 4
Table 2 East WRF Hydrogen Sulfide Monitoring Summary 9
Table 3 East WRF Historical Monthly and Annual Average Daily Flows 10
Table 4 East WRF Influent cBOD5 and TSS Concentrations and Loads 12
Table 5 Winter Springs Population and Flow Growth Factors 13
Table 6 5-Stage BNR Fact Sheet 22
Table 7 Membrane Bioreactor(MBR) Fact Sheet 23
Table 8 Sequencing Batch Reactor(SBR)Fact Sheet 26
Table 9 Aerobic Granular Sludge(AGS)Fact Sheet 28
Table 10 Ballasted Activated Sludge(BAS) Fact Sheet 30
Table 11 Integrated Fixed-Film Activated Sludge(IFAS) Fact Sheet 32
Table 12 Major Evaluation Criteria and Corresponding Sub-Criteria 34
Table 13 Major Evaluation Criteria and their Relative Importance 35
Table 14 East WRF Influent Design Flow and Mass Load Peaking Factors 38
Table 15 Conceptual Influent Design Wastewater Flows and Loads 39
Table 16 Headworks Design Criteria for 5-Stage BNR 41
Table 17 Secondary Treatment Design Criteria for 5-Stage BNR 42
Table 18 Filter Design Criteria for 5-Stage BNR 43
Table 19 Chlorine Contact Chamber Design Criteria for 5-Stage BNR 44
Table 20 Headworks Design Criteria for MBR 49
Table 21 Secondary Treatment Design Criteria for MBR 50
Table 22 Chlorine Contact Chamber Design Criteria for MBR 52
Table 23 MBR Chemical Cleaning System 53
Table 24 Supplemental Carbon Storage and Feed Design Criteria 58
APRIL 2022 I iii
51
EAST WRF CONCEPTUAL DESIGN REPORT CITY OF WINTER SPRINGS
Table 25 Alum System Design Criteria 58
Table 26 Solids Handling Design Criteria 60
Table 27 AACE International Guidelines for Cost Estimating Accuracy 61
Table 28 5-Stage BNR Conceptual Capital Cost 63
Table 29 MBR Conceptual Capital Cost 64
Table 30 Conceptual Annual O&M Cost Comparison 65
Table 31 1.5 mgd BNR Conceptual Capital Cost 69
Figures
Figure 1 Existing East WRF Process Flow Diagram 3
Figure 2 East WRF Site and Contour Survey 6
Figure 3 East WRF Environmental Survey Area 8
Figure 4 OdaLog Installation Locations at East WRF 9
Figure 5 East WRF Annual Average Daily Flows 11
Figure 6 East WRF Historic Monthly cBOD5 and TSS Loading 12
Figure 7 East WRF Flow Projections 14
Figure 8 Overview of Biological Treatment Technologies for Nitrogen and
Phosphorus Removal from Municipal Wastewater 17
Figure 9 Biological Treatment Technologies for Achieving AWT in Municipal
Wastewater 20
Figure 10 5-Stage BNR Process Flow Diagram 21
Figure 11 Membrane Bioreactor(MBR) Flow Diagram 23
Figure 12 Sequencing Batch Reactor(SBR) Process Flow Diagram 25
Figure 13 Aerobic Granular Sludge(AGS)Process Flow Diagram 27
Figure 14 Ballasted Activated Sludge(BAS) Flow Diagram 29
Figure 15 Integrated Fixed-Film Activated Sludge(IFAS)Flow Diagram 31
Figure 16 Process Alternative Ranking Using Weighted Criteria 36
Figure 17 5-Stage BNR Conceptual Site Layout(2.1 mgd with AWT) 46
Figure 18 Hydraulic Profile for the 5-Stage BNR Alternative 48
Figure 19 MBR Conceptual Site Layout(2.1 mgd with AWT) 55
Figure 20 1.5 mgd Conceptual BNR Site Layout(1.5 mgd) 68
APRIL 2022 I iv
52
EAST WRF CONCEPTUAL DESIGN REPORT CITY OF WINTER SPRINGS
Abbreviations
AADF annual average dailyflow
AC acre
AGS aerobic granular sludge
alum aluminum sulfate
AWT advanced wastewater treatment
BAS ballasted activated sludge
BNR biological nutrient-removal
BOD biochemical oxygen demand
Carollo Carollo Engineers, Inc.
CAS conventional activated sludge
CBODS S day carbonaceous biochemical oxygen demand
City City of Winter Springs
cf cubic feet
cfm cubic feet per minute
cfs cubic feet per second
EBPR enhanced biological phosphorus removal
EPA Environmental Protection Agency
EQ equalization
F.A.0 Florida Administrative Code
FDEP Florida Department of Environmental Protection
FOG fats, oils,and grease
ft feet
gpm/ft2 gallons per minute per square foot
HLD high level disinfection
HRT hydraulic retention time
IBC intermediate bulk container
IFAS integrated fixed-film activated sludge
IMLR internal mixed liquor recycle
Ib/d pounds per day
MBR membrane bioreactor
MDF maximum daily flow
MG million gallons
mg/L milligrams per liter
mgd million gallons per day
MLSS mixed liquor suspended solids
MMADF maximum month average dailyflow
APRIL 2022 v
53
EAST WRF CONCEPTUAL DESIGN REPORT CITY OF WINTER SPRINGS
O&M operations and maintenance
PHF peak hour flow
psig pounds per square inch, gauge
RAS return activated sludge
RFI request for inclusion
rbCOD readily biodegradable chemical oxygen demand
SBR sequencing batch reactor
SCADA supervisory control and data acquisition
Scfm standard cubic feet per minute
SFAS step feed activated sludge
SHT sludge holding tank
SRT sludge retention time
SWD side water depth
TDH total dynamic head
TMP transmembrane pressure
TN total nitrogen
TP total phosphorus
TRC total residual chlorine
TS total solids
TSS total suspended solids
WAS waste activated sludge
WRF water reclamation facility
APRIL 2022 vi
54
EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
EXECUTIVE SUMMARY
The City of Winter Springs owns and operates the East Water Reclamation Facility(WRF).The
facility is permitted for 2.012 mgd AADF by the Florida Department of Environmental Protection
but currently experiences flows at approximately half this capacity.The East WRF was originally
constructed in the mid-1970s and has consequently reached the end of its useful life, requiring
both replacement and modernization.
Carollo and Wekiva Engineering conducted assessments of the East WRF as part of this project
and the priority repairs projects over the past year and concluded that no major component has
permanent value worth restoring.While some existing infrastructure and minor components
may be rehabilitated and reused,they generally only serve temporary purposes and have no
permanent value.
Based on the condition of the current facility,this CDR focuses on the construction of new
replacement of the East WRF. Specifically,the goal is to conceptualize a new facility which can
meet current and future water quality requirements while planning for growth over decades to
come.This facility should also be built for resiliency and reliability, such that the City does not
experience the current facility challenges again.
To conceptualize the future facility, a boundary survey,ecological assessment,and odor study
were completed as part of this CDR. Carollo then performed an analysis of all liquid treatment
technologies to determine which treatment alternative best suits the City.As part of this
evaluation, Carollo performed the following:
Prepared a working list of liquid-stream technologies proven to meet Advanced
Wastewater Treatment(AWT)standards,
Performed a conceptual-level review of the selected liquid-stream process alternatives,
Developed evaluation criteria to rank each of the process alternatives in terms of their
ability to meet the City's values,
Hosted a paired comparison exercise with a City-appointed selection committee for City
to apply a value(or weight)to each evaluation criterion, and
Shortlisted two alternatives from the working list for further development and in-depth
analysis(i.e., conceptual site layout and capital/operational cost estimate).
The working list of liquid-stream technologies proven to meet AWT included:
Five-stage activated sludge BNR(5-5tage BNR).
Membrane bioreactor(MBR).
Ballasted activated sludge(BAS).
Aerobic granular sludge(AGS).
Sequencing batch reactor(SBR).
Integrated fixed-film activated sludge(IFAS).
APRIL 2022 1 ES-i
55
EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
The paired comparison exercise with the City-appointed selection committee,as well as the
decision analysis, resulted in the list of treatment alternatives below.The alternatives are ranked
from highest to lowest based on the City's applied values:
1. Five-stage activated sludge BNR(5-stage BNR).
2. Membrane bioreactor(MBR).
3. Sequencing batch reactor(SBR).
4. Ballasted activated sludge(BAS).
5. Integrated fixed-film activated sludge(IFAS).
6. Aerobic granular sludge(AGS).
Conceptual designs, site layouts,and capital/O&M cost estimates were developed for the top
two scoring technologies: 5-stage BNR and MBR.The design flows and loads used to compare
the BNR and MBR conceptual designs and costs to provide a final recommendation correspond
to a true"buildout"scenario.This scenario represents what the City may require in the far-term
future, i.e., post-2045, in terms of quantity and quality.These far-term future needs include a
flow of 2.1 mgd AADF, and a production of AWT-quality effluent. However,a final
recommendation for a conceptual East WRF, sized for today's needs, is later provided.
The conceptual capital cost estimates for the 5-stage BNR and MBR alternatives at"buildout"
(2.1 mgd with AWT)are approximately$48,082,000 and $53,922,000, respectively.The MBR
alternative proved slightly more costly than the BNR(as the MBR alternative requires additional
fine screening,flow equalization, increased chemical storage,etc.).An annual O&M comparison
shows that the MBR alternative is also more costly to operate and maintain, costing
approximately$150,000 more than the 5-stage BNR alternative on an annual basis. Class 5
accuracies were used to determine the conceptual cost estimates and have a 20 percent
contingency applied due to the conceptual level of design.
Both BNR and MBR are established technologies in the United States,with a track record of
successfully meeting stringent nutrient discharge limits. However, 5-stage BNR is known as the
"Gold Standard"of CAS technologies and is more highly implemented in Florida,creating a
large, local resource pool for operators to turn to when in-need of support.Additionally,the
5-stage BNR process is similar to current operations and does not require a high degree of
additional operator training. On the other hand,while MBR has a smaller footprint in comparison
to the 5-stage BNR, it requires a higher pumping/energy and chemical use, and more mechanical
equipment,which ultimately creates more required maintenance. Based on these non-economic
factors, as well as the conceptual capital cost estimates, it is recommended that the City select
the 5-stage BNR alternative as the proposed treatment process for the East WRF.
Limited growth is expected within the City of Winter Springs over the next 20 years. Results from
the population analysis indicated that 2045 flows may range anywhere from 1.04 to 1.43 mgd
AADF.Additionally,the"City of Winter Springs 2022 Wastewater and Reclaimed Water Master
Plan"prepared by Kimley-Horn projects that population growth within available parcels and
potential septic to sewer conversions may result in flows up to 1.49 mgd over the next 20 years.
Both projections are far less than the current permitted capacity of 2.012 mgd.
APRIL 2022 I ES-ii
56
EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
Rather than designing, constructing, and paying for an oversized facility today, and
consequently having to operate and maintain the oversized facility, Carollo recommends that
the City"build for today but plan for tomorrow"(i.e., right-size the WRF for near-term growth).
To elaborate, since flows are not expected to surpass 1.49 mgd AADF in the next 20 years,
Carollo recommends that the proposed East WRF be designed for a capacity 1.5 mgd AADF,
while also allocating space onsite such that the capacity can be readily expanded to meet future
needs.Additionally, because AWT is not required today, it is recommended to phase the
construction process to ensure current treatment standards are being met but allow AWT
build-out to meet future requirements.
A proposed conceptual site layout for this 1.5 mgd scenario(to meet today's treatment
standards)was developed. It is recommended that the City initially construct a facility based off
of this conceptual design and modify as needed to meet future quantity and quality needs,
ultimately to the full buildout scenario of 2.1 mgd with AWT(if required).
The conceptual capital cost estimate forthe recommended 1.5 mgd East WRF is approximately
$34,792,000. By right sizing the East WRF fortoday's needs,the City would save approximately
$13 million dollars,today, on capital costs,with additional savings on annual O&M costs.The
City would also have the flexibility, reliability, and redundancy to take basins offline,while still
operating efficiently and meeting effluent requirements.
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EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
1.0 Introduction, Summary of Existing Facilities, and
Wastewater Flow and Load Projections
1.1 Introduction
The City of Winter Springs(City)owns and operates two Water Reclamation Facilities(WRF):the
East(FLA011068)and West(FLA011067)WRF.The East WRF consists of two separate package
wastewater treatment plants(WWTPs), known as WWTP No.1 and No. 2.These plants were
constructed in the mid-1970s and early 1990s, respectively,and have a total combined capacity
slightly above 2 mgd.These plants,and the entire east facility, have reached the end of their
useful life and require replacement. Carollo Engineers, Inc.(Carollo) has been tasked with
assessing and summarizing the current facility, and further recommending two treatment
process alternatives for the City to incorporate in the design of their new WRF.
Rather than replacing the East WRF in-kind,the proposed plant process will be planned for the
future ability to meet more stringent treatment requirements and effluent criteria,which will
inevitably be required with future environmental regulations.The purpose of this Conceptual
Design Report(CDR) is to provide the City with two proposed treatment process alternatives for
the new East WRF, and a final recommendation with an associated conceptual design, site
layout,and cost estimate.This CDR will form the basis for the subsequent detailed design,
permitting, bidding, and construction phases of the new facility construction. Overall goals of
this project are to provide a new wastewater facility that is reliable, meets current regulations
with the ability to achieve future regulations,aligns with the City's growth and associated
treatment needs,and emphasizes City values.
1.2 Basis for Conceptual Design
The East WRF currently operates as a secondary wastewater treatment facility under the Florida
Department of Environmental Protection's(FDEP)domestic wastewater facility permit
No. FLA011068.The facility is permitted to treat annual average daily flows(AADF)of up to
2.012 mgd but experiences flows at approximately half of this capacity.
The existing treatment processes at the East facility provide the level of treatment required for
its effluent to meet the following water quality requirements under the current permit:
A 5-day carbonaceous biochemical oxygen demand(cBOD5)concentration of less than
or equal to 20 milligrams per liter(mg/L),when calculated as an annual average.
A total suspended solids(TSS)concentration of less than or equal to 5 mg/L for any
single sample.
A total residual chlorine(TRC)concentration of 1 mg/L, minimum,for any single sample.
A total nitrate, as nitrogen(NO3-—N)concentration of less than or equal to 12 mg/L for
any single sample.
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EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
The FDEP sets forth the regulatory requirements for effluent discharges from wastewater
treatment facilities and addresses end-use effluent water quality standards. Effluent disposed via
public access reuse(PAR) has higher disinfection requirements compared to non-beneficially
discharged effluent. Furthermore, effluent that is discharged for groundwater recharge and
surface water discharges in protected watersheds typically require the achievement of the
highest level of wastewater treatment, known as Advanced Wastewater Treatment(AWT).AWT
is defined in F.S.403.086(4)(a)and requires that wastewater be treated beyond the secondary
state, providing an effluent that has annual average values, including:
A 5-day cBODS concentration of less than or equal to 5 mg/L,
A TSS concentration of less than or equal to 5 mg/L,
A total nitrogen(TN)concentration,expressed as nitrogen, of less than or equal to
3 mg/L,
A total phosphorus(TP)concentration, expressed as phosphorus, of less than or equal to
1 mg/L,and
Received high-level disinfection(HLD)as stated in 62-600.440 Florida Administrative
Code(F.A.C.). HLD requires an effluent which meets the following criteria:
Any single sample shall not exceed 5 mg/L TSS prior to application of a disinfectant.
Any single sample shall not exceed 25 fecal coliform values per 100 mL of sample.
On a monthly basis, 75 percent of the fecal coliform values shall be below the
detection limits.
When chlorine is used for disinfection, a TRC of at least 1 mg/L shall be maintained
at all times and the minimum acceptable contact time shall be 15 minutes at the
peak hourly flow(PHF).
The current East WRF operations do not include disposal of treated effluent via any methods
that require AWT. However,there are strong indications that state regulatory agencies will enact
future regulations that will require the City to treat its effluent to achieve AWT standards. For
example,the City of Winter Springs is surrounded by protected watersheds defined by the
St.John's River Water Management District(SJRWMD).Any treated effluent applied to these
protected watersheds must be treated to a higher standard,with stricter nutrient limits. Over
time as these protected watershed basins are expanded, it is logical to assume that in the
future,the City may be located within a protected watershed and will be required to treat any
site-applied effluent to the higher standard.Additionally, more stringent treatment standards
are required for Surface Water and Backup Discharges,which are application methods not
currently used by the City but may be in the future.
To summarize, while AWT is not required today,there are strong indications that it will be in the
future. It is recommended that when designing the new East WRF,the City plan for a facility that
does not necessarily meet AWT today, but has the foundation in-place to allow for future
modifications to do so. Consequently,the proposed conceptual designs outlined in this report
are intended to meet current effluent requirements with the ability to be readily modified to
achieve AWT, if required in the future.
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EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
1.3 Summary of Existing Facility
A condition assessment, as well as various surveys and studies,were conducted to gather an
overall understanding of the facility and the condition of the existing components.The following
subsections summarizes the findings of these assessments and the current condition of the East
WRF.
1.3.1 Existing Treatment Process and Effluent Disposal
The East WRF is comprised of two separate package treatment plants(circular field-erected steel
tanks)originally designed to use an activated sludge process, known as contact stabilization, and
a third concrete tank dedicated to sludge thickening and holding (Digester No.3).The treatment
units consist of a surge tank, influent screening, concentric aeration basins(made up of
reaeration and contact tanks),and a clarifier in the center. RAS is also part of the aeration
process and is provided using air lifts.The clarified effluent then flows from the treatment tanks
to the tertiary moving-bed filters(DynaSand®filters),and finally to the chlorine contact
chamber.A 0.18 million-gallon(MG)concrete sludge digester/holding tank,3 MG covered
reclaimed water(RW)storage tank and combined 5.61 MG combined wet weather and reject
storage pond are all onsite components of the East WRF, as well. Solid residuals are stored in a
sludge holding tank(SHT)that is aerated for mixing and preventing septic conditions prior to
dewatering. Stored solids are dewatered using a mobile belt filter press and then hauled offsite
for processing.A process flow diagram (PFD)of the existing East WRF is included in Appendix A,
with a snapshot shown in Figure 1.
o� �a
------------
d a.
a �
Attachment No.2
PROCESS FLOW DIAGRAM
CITY OF WINTER SPRINGS EAST WRF
Figure 1 Existing East WRF Process Flow Diagram
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EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
The East WRF supplies PAR-quality effluent to the City's reuse service area for irrigation
purposes.To be considered PAR-quality, reclaimed water must have experienced secondary
treatment, contain no more than 5 mg/L total suspended solids(TSS), and achieve HLD. Effluent
that meets PAR quality but is generated in excess of customer demand(e.g.,during heavy rain
events)is stored onsite at the facility in the GST, and combined wet weather/reject storage
pond.The City also has alternate disposal sites, including the Oak Forest Spray Field land
application site and Owasco rapid infiltration basin(RIB)which can accept 0.201 mgd and
0.61 mgd AADF, respectively. However,these alternate disposal sites are permitted under the
same reuse system, ultimately requiring the same effluent requirements as their primary PAR
disposal method (R-001).Therefore, any effluent that does not meet PAR quality is diverted to
the onsite reject pond—of which 2 MG of the total 5.61 MG is dedicated reject storage.
The current East WRF permit(No. FLA011068)expires in March 2022, and Carollo recently
supported the City on the completion and submission of the facility permit renewal.With the
renewal,the City requested the State to designate the Owasco RIB as a R-003 discharge location
and change the water quality/effluent requirements for discharge to this location. In doing so,
this site(R-003)would be permitted under a separate reuse system and used for disposal of
non-spec effluent which does not meet PAR standards.The East Permit would then match the
permit conditions for non-PAR discharges in the City's West WRF Permit(FLA011067).These
non-par discharge quality requirements are shown below in Table 1.
fable 1 East Permit Renewal Effluent Disposal Site/Water Quality Requirements Request
Site ID Location Effluent Quality Requirement
[cBOD5]<30 mg/L(l)
[TSS]<5 mg/L(l)
R-001 PAR System [TN]—Report
[TP]—Report
Fecal Coliform<25#/100 mL(l)
[cBODS]<30 mg/L(l)
R-002 N/A(5) [TSS]<5 mg/L(2)
Fecal Coliform<200#/100 mL(4)
[cBOD5]<30 mg/L(l)
R-003 Owasco RIBS [TSS]<30 mg/L(2)
[NO3-- N]<12 mg/L(2)
Fecal Coliform<200#/100 mL(4)
Notes:
(1) Monthly Average.
(2) Single Sample Maximum.
(3) Single Sample Maximum(Samples Collected 7 days/week).
(4) Monthly Geometric Mean(Samples Collected Weekly).
(5) The Oak Forest Spray Field has potable wells located within a 500-foot buffer surrounding the site,and consequently,
cannot accept non-PAR quality effluent(FDEP Rule 62-610.421 F.A.C.).
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EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
1.3.2 Condition Assessment
Over the past year, Carollo has visited the East WRF numerous times,through which a condition
assessment of the existing unit processes was completed. Part of this assessment has also
included priority repairs to the current facility in order to maintain operation until the facilities
are permanently replaced. Since the facility was originally constructed in the mid-1970s(with an
expansion in the early-1990s),a majority of its components have reached the end of their useful
life and are visibly degraded/corroded.As a subconsultant to Carollo,Wekiva Engineering also
performed a structural assessment of the primary assets at the East WRF in December 2021 and
concluded that no major component at this facility has permanent value worth restoring.While
some existing infrastructure and minor components may be rehabilitated and reused,they may
only serve temporary purposes and have no permanent value. One exception to this is the
existing chlorine contact chamber. Structurally,the chlorine contact chamber is in acceptable
condition and could be rehabilitated to lower construction costs, including new repumping
equipment costs. Some components still require replacement,such as the effluent gates.
However,the existing chlorine contact chamber may not fit into the hydraulic profile of the new
East WRF.This must be further analyzed during subsequent design stages.
The existing electrical equipment is also outdated and does not meet current National
Electric Code(NEC).As such,for conceptual design purposes, no unit process equipment
(e.g., mechanical, structural, or electrical assets)will be preserved for the new East WRF.
There are, however,some non-unit process items which have the possibility of being maintained
for storage purposes, including the reuse GST, onsite storage/reject pond,and one of the
three circular steel structures.The GST and storage/reject pond are in good condition overall and
can continue to store treated effluent for the new WRF.One of the three steel structures may
also be repaired or rehabilitated and temporarily used to store solid residuals from the new
treatment scheme,allowing the City time to plan and design for a permanent solids handling
facility. Like the chlorine contact chamber,the feasibility of reusing these existing assets must
be further assessed during later design stages.
1.3.3 Site Boundary and Contour Survey
L&S Diversified(L&S)completed a conceptual-level boundary and topographic survey to
facilitate the planning stages of the project.The established boundary of the East WRF totals
approximately 50.6 acres, although this includes a number of trees and wetlands which have
been preliminarily identified. Figure 2 shows the limits of the site boundary and contour survey.
In addition to displaying boundary lines, easement information, and contour lines,the attached
survey(included in Appendix B), also displays existing buried mains, as well as the elevations of
key hydraulic infrastructure.
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EAST WRF CONCEPTUAL DESIGN REPORT CITY OF WINTER SPRINGS
-4N 2d
Figure 2 East WRF Site and Contour Survey
1.3.4 Environmental Review
An environmental review was completed of the site based on the planned concept facilities.
Environmental Science Associates(ESA)completed an environmental constraints review within
the review area shown in Figure 3.Appendix C includes the ESA environmental constraints
review and the Florida Natural Area Inventory(FNAI)tracking list. In general,and as further
described below,there are minor site constraints which will need to be addressed in design,
primarily including wetland impacts in some areas of construction.
The following items are addressed to meet state,federal and potential funding requirements:
List threatened,endangered, proposed,and candidate species and designated
critical habitats that may be present in the project area(may be obtained from
U.S. Fish and Wildlife Service).A list of potential threatened, endangered, proposed,
and candidate species and designated critical habitats that may be present within the
general area ofthe proposed Project is attached as Appendix C, Florida Natural Areas
Inventory. Habitat does not exist within the Project review area for a majority of these
species, with the exception ofthe Bald eagle(Haliaeetus leucocephalus)and gopher
tortoise(Gopherus polyphemus), as identified in the General Environmental Constraints
Review(Appendix Q.The Audubon Florida EagleWatch Nest Locator database was
reviewed,and no nest trees were identified within 600-feet(protective nest buffer zone)
ofthe Project review area,therefore impacts to the bald eagle are not anticipated.
Additionally, during the environmental review, no gopher tortoise burrows were
observed within or directly adjacent to the Project area. However,a 100-percent gopher
tortoise burrow survey will need to be performed within the upland limits of proposed
Project footprint, at least 90 days from construction initiation in accordance with the
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EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
Florida Fish and Wildlife Conservation Commission gopher tortoise survey and
permitting guidelines(reference in Rule 68A-27.003, Florida Administrative Code).
No other listed Species, or critical habitat was observed or identified within the property
limits.
Discuss any significant adverse effects upon flora,fauna,threatened or endangered
plant or animal species,surface waterbodies, prime agricultural lands,wetlands,or
undisturbed natural areas. No listed flora or faunal species were identified within the
attached Environmental Constraints Review(Appendix Q.The proposed Protect is
anticipated to impact approximately up to 2 acres of forested wetlands that were
identified as medium quality and jurisdictional to the state and federal agencies.Other
areas that may be impacted from the Project activities include highly disturbed,
maintained upland areas that are inclusive of the treatment facility. No other
undisturbed natural areas exist within the footprint of the proposed Project.The facility
is located within the City of Winter Springs Planned Unit Development(PUD)Zone;
therefore, no prime or unique agricultural lands exist within the proposed Project
footprint.
List any significant adverse environmental effects and what project features will
mitigate such effects. It is anticipated that the Project activities will impact
approximately up to 2 acres of medium quality forested wetlands. During the final
design phase of the Project,all impacts will be minimized,where feasible,to further
reduce the footprint and the Project impacts.All construction activities will obtain and
comply with National Pollutant Discharge Elimination Systems(NPDES)permits and
employ Best Management Practices to assure no impacts to water resources during
construction.The site development associated with the Project will follow state water
quality and quantity regulations to avoid alteration in drainage patterns or soil erosion or
runoff.The Project will obtain construction and operation phase permits from the
required state and federal agencies and will operate in accordance with all relevant
regulations. In addition, appropriate state and federal permits will be obtained and
mitigation will occurto off-set those impacts. Mitigation options for this area include:
— Utilization of an approved mitigation site within the Lake Jesup Basin,
— Construction of a wetland mitigation site within the Lake Jesup Basin,either
utilizing land owned or purchased by the City of Winter Springs, or
— Investigations with FDEP to utilize an out-of-basin, regionally significant mitigation
bank(within the same watershed—St.Johns River Watershed)with a Cumulative
Impact Analysis.
Discuss any significant adverse human health or environmental effects on minority
or low-income communities.The East WRF is located in the eastern area of Winter
Springs, primarily surrounding by residential community. Recent data from the
EJSCREEN Census Summary Report(Accessed April 2022) indicates an overall City
population demographic index of 26 percent with low income being 19 percent. Forthe
immediate area around the East WRF,the demographic index is 16 percent,with low
income being 3 percent.All values are under the state and national averages.
Furthermore,this project considers the replacement of an existing WRF with a new
facility.An improved and modernized WRF will benefit the entire community with
improved reliability in wastewater treatment and effluent water quality which meets or
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EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
exceeds regulatory requirements.Therefore, disproportionate high or adverse
environmental effects to a minority population is not anticipated.
NReview Area
c GPS Locations ""'`-'�' e,I
Delineated WetlandlOSW Limits
_,I:]Wetland Features •� �,- �- I
•IM OSW Features ! i_:wllc 4 o a
QEast WRF Property Boundary
1 'Jv ° a8 0 ! L
1 - - •�,�+
:. ...._ yiv. ..._ du. : be
4- _ .. ;
-. :!"l ft'.::..l--__`:,:1.'':9"�:�:�•.:::�....9-'MCC:::_:Ir .::_:•:9'llllf._:�:.
,w..>i 300
Feet
Figure 3 East WRF Environmental Survey Area
1.3.5 Odor Survey
Webster Environmental Associates, Inc. (Webster)completed an odor survey at the East WRF in
November 2021.This study was done to assess the Hydrogen sulfide(H2S)gas odor impact on
the local area,for consideration with the design and construction of a new treatment facility.
Hydrogen sulfide occurs naturally in sewers, manure pits,well water,oil and gas wells, and
volcanoes.The health effects of hydrogen sulfide depend on how much H2S a worker breathes
and for how long.The odor threshold for hydrogen sulfide gas falls in the 0.01 to 1.5 ppm range
and some will begin to notice the"rotten egg smell"at these concentrations.The odor becomes
more offensive at 3 to 5 ppm. Prolonged exposure in confined areas at these concentrations may
cause nausea,tearing of the eyes, headaches,or loss of sleep. However, because wastewater
facilities are mainly open to the atmosphere, operators and visitors are generally not at risk for
negative health effects from H2S during routine operation.
Six OdaLogT"' units were installed around the facility and recorded Hydrogen sulfide(H2S)gas
concentrations for nine days.These 0daLogT1 units measure H2S in the range of+/-300 ppb and
were installed at the following locations:flow splitter box/headworks, surge tanks, SHT,
digester,and belt filter press.The sixth OdaLOgT"' unit was installed on a tree outside of the WRF
property, near the public park entrance,to understand how odors may disperse from the
treatment site and migrate to the park area.The locations of each logger are shown graphically
in Figure 4.
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EAST WRF CONCEPTUAL DESIGN REPORT CITY OF WINTER SPRINGS
East WRF T
Odor Logger Locations --I
oe eg.
tl
�i 'I OOaL gp5 Oe L 9Y3 Sug B h Y "
+J '1 --Belt FII %eas Salltl X 1e1 g
/ POtla Leg k6.
,
a
h
- ear�lcar:exe :...
sin -� u un �Li - - vim yy .-•
Figure 4 OdaLog Installation Locations at East WRF
The OdaLogT"' data from the nine-day monitoring period is included in Table 2.All locations
were found to have low to moderate concentrations of H2S(with an average of 0 to 3 ppm),
apart from the surge tank which had very high, brief spikes each day.These spikes then quickly
dispersed,only lasting approximately 5 minutes.They would occur daily between Ilam and 2pm
and range from 100 to 1,200 ppm.While it is not confirmed,one potential cause ofthese brief
spikes could be attributed to the master lift stations experiencing peak flows.A number of
wastewater lift stations discharge directly into the surge tank at the East WRF and because they
likely turn on at the same time during peak flows, high loads will be discharged into the surge
tank at these times.Webster noted that these concentrations are likely to also cause offsite odor
detections.
The park entrance instrument surprisingly recorded two brief spikes of 0.1 ppm,also lasting
approximately 5 minutes,which may be the result of the high H2S coming from the surge tank.A
full copy of the Odor Study report can be found in Appendix D.
Table 2 East WRF Hydrogen Sulfide Monitoring Summary
Instrument Location Instrument ... Duration H2S Average H2S Peak
.- .. .. ..
Influent Splitter Box 0-1,000 11/10/21 to 11/19/21 0.12 2
Surge Tank 0-1,000 11/10/21 to 11/19/21 3 1201
Thickener Tank 0-1,000 11/10/21 to 11/19/21 0 0
Aerobic Digester Tank 0-1,000 11/10/21 to 11/19/21 0 1
Belt Press 0-200 11/10/21 to 11/19/21 0 7
Park Entrance 0-50 11/10/21 to 11/19/21 0 0.1
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EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
1.3.6 Geotechnical Investigation
At the time of this report, no geotechnical investigation has been conducted at the East WRF.
This information will be needed prior to the design stages but is not necessary within conceptual
design.A complete geotechnical survey and determination of structure locations should
therefore be performed as part of the final design.
1.3.7 Wastewater Characterization and Population Flow Projections
Based on the identified service area, population growth,and historical facility flows, a projected
flow was developed for the East WRF to use when sizing the new facility.The following
subsections summarize the existing historical water quality and quantity data,as well as
population projections,to develop design criteria for the future facility, including flows, loads,
and peaking factors.
1.3.8 Wastewater Flow and Loading Characterization
Historical flow data was gathered and analyzed as part of the recently completed East WRF
permit renewal.Table 3 provides historical monthly flows observed at the facility over the past
10 years,as well as minimum, maximum and annual average flows.All data was obtained from
Discharge Monitoring Reports(DMR)submitted by the City to FDEP.
Table 3 East WRF Historical Monthly and Annual Average Daily Flows(')
•nth/Year 2011 20121 114 2015 20161 1 1 • 2020 2021
January 0.99 0.80 1.03 1.10 1.03 0.99 1.02 1.00 1.04 0.97 1.03
February 0.95 0.85 1.00 0.98 0.98 1.03 0.95 0.96 1.10 1.00 1.00
March 0.95 1.03 1.07 1.01 1.05 1.01 0.91 0.96 1.05 1.04 0.97
April 0.91 1.02 1.04 1.00 1.02 1.11 0.98 0.96 1.10 1.05 1.04
May 0.84 0.99 1.08 1.00 1.01 1.05 0.96 0.96 0.99 1.02 0.95
June 0.83 1.05 1.05 0.98 0.92 1.07 0.95 1.06 1.04 0.96 0.94
July 0.90 1.12 1.21 1.01 0.98 0.96 1.10 1.07 1.07 0.90 0.97
August 0.91 1.08 1.17 1.03 1.04 0.96 1.07 1.07 1.05 0.98 1.11
September 0.84 1.17 1.06 1.07 1.13 1.05 1.35 1.04 0.97 1.09 1.13
October 0.96 1.21 1.03 1.12 1.02 1.13 1.16 0.88 1.00 1.03 1.01
November 0.88 1.06 1.10 1.03 1.08 0.99 0.94 1.03 1.00 1.06
December 0.88 1.13 0.98 1.06 1.02 0.99 1.16 1.07 1.00 1.01
Minimum 0.83 0.80 0.98 0.98 0.92 0.96 0.91 0.88 0.97 0.90 0.94
Maximum 0.99 1.21 1.21 1.12 1.13 1.13 1.35 1.07 1.10 1.09 1.13
AADF(2) 0.90 1.04 1.07 1.03 1.02 1.03 1.05 1.01 1.03 1.01 1.01
Notes:
(1) All units offlow are in mgd.
(2) AADF for 2021 is the average from January to October.
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Figure 5 is a plot of AADF, long-term average flow, and the permitted capacity at the East WRF.
This figure shows that the yearly AADF never exceeded the permitted capacity of 2.012 mgd
between 2011 and 2021.Additionally,the long-term average flow was 1.02 mgd AADF and the
maximum monthly flow observed was 1.35 mgd over this 10-year period, indicating that East
WRF has operated at roughly half of its permitted capacity.
East WRF
t AA D F ---Long-Term Average - - Perm itted Capacity
2.2
2.0 _ _ _ _ _ _ _ _ _ _ * _ _ _ _ - _ _ _ _ r _ _
1.81.6 - -- -- - - --- I I
Permitted Capacity=2.012 mgd
1.4 - -
E 1.2
c1.0 --- ---- ---
LL0.8 ------- ------------------------------------ ------------------------------- -------------------------------
0.6 Long-Term Average Flow=2.02 mgd ----------------- ------------------------------- -------------------------------
0.4 --------- -------------------------------- ------------------------------- ------------------------------ -------------------------------
0.2 - -
0.0
`lo�yN
Figure 5 East WRF Annual Average Daily Flows
In addition to flows, historical loading information over the past year was compiled for the East
WRF.Table 4 and Figure 6 present average monthly influent cBOD5 and TSS concentrations and
loadings observed at East WRF between October 2020 and October 2021. No influent TN and TP
data was available as these parameters are not required to be monitored in the facility's influent
under its current permit. Consequently, industry standard ratios of 1:5 and 1:11 were used for
TKN:cBOD5 and TP:cBODS, respectively. It should be emphasized that these factors should be
refined during later design stages following a detailed influent sampling campaign.
Influent TSS and cBOD5 both exhibited similar trends, with maximum loads observed in
February 2021 and average annual loads of 1,970 and 1,980 Ib/d, respectively. Minimum loads
were observed in October 2020 and May 2021.Additionally, a statistical analysis was performed
to remove data outliers prior to calculating the relevant design peaking factors-results of this
analysis are presented in Section 3.2.1 Influent Wastewater Flows and Loads.
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Table 4 East WRF Influent cBOD5 and TSS Concentrations and Loads
Influent :ODcBC)D5 Influent TSS InfluentTSS
Month/YearConcentration ... . Concentration Loading
lb/day . lb/day
Oct-20 122 1,043 130 1,111
Nov-20 126 1,110 180 1,585
Dec-20 182 1,538 296 2,501
Jan-21 212 1,821 292 2,508
Feb-21 341 2,838 452 3,762
Mar-21 341 2,753 254 2,051
Apr-21 275 2,374 220 1,899
May-21 213 1,682 125 987
Jun-21 322 2,522 260 2,036
Jul-21 276 2,224 266 2,143
Aug-21 228 2,118 266 2,471
Sep-21 188 1,693 61 549
Oct-21 201 1,695 135 1,138
Average 230 1,960 230 1,900
Minimum 122 1,043 61 573
Maximum 341 2,838 452 3,762
East WRF
flnf cBOD5 Load -a-Inf TSS Load
4,000
3,500
3,000
�2,500
02,000
1,500
= 1,000 ---
500
0
Figure 6 East WRF Historic Monthly cBODs and T55 Loading
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EAST WRF CONCEPTUAL DESIGN REPORT I CITY OF WINTER SPRINGS
1.3.9 Population Projections
Population data and projections for Winter Springs were obtained from a combination of reports
prepared by the U.S. Census Bureau and the Bureau of Economic and Business Research(BEBR).
Because the U.S.Census reports current populations on a city-basis,while the BEBR report lists
population projections on a county-basis,a number of assumptions were applied for this analysis
to draw meaningful conclusions from the data available. However,these assumptions were
verified with the analyzed data made by Kimley-Horn in the"City of Winter Springs 2022
Wastewater and Reclaimed Water Master Plan"for consistency and accuracy.Additionally,
internal meetings were held with the City Plannerto gain an understanding of future potential
growth or other wastewater contributors that may impact the East WRF's future wastewater
flows.
One assumption made is that the City of Winter Springs will experience the same growth
projected for Seminole county through 2045, and that wastewater flows would increase
proportional to this population growth.Another assumption was that all of the citizens reported
by the U.S. Census were connected to the City's sewer system, and that the City's wastewater
service area exhibits an even split between East and West WRFs.This even-split assumption is
consistent with the analyzed data within the"City of Winter Springs 2022 Wastewater and
Reclaimed Water Master Plan"prepared by Kimley-Horn.
Based on these assumptions,the growth factors listed in Table 5 were developed and used to
project wastewater flows through 2045. Discussions with the City Planner revealed that
generally limited growth is expected in the near future since no large, new developments within
the City's wastewater service area are currently planned.Additionally, a majority of City property
has been developed and the City does not plan to acquire any considerable portion of additional
land.
Table 5 Winter Springs Population and Flow Growth Factors
Projection Type(')(') 1 1 1 2035 2040 2045
Low Series -1.2% 0.8% 2.3% 3.1% 3.2%
Medium Series 6.0% 10.9% 15.0% 18.5% 21.5%
High Series 12.8% 21.3% 28.9% 35.9% 42.3%
Notes:
(1) All factors shown in the table above correspond to population growth relative to the current Winter Springs population.
(2) Sources:U.S.Census Bureau(2020),Winter5prings population estimates base and BEBR(2020),Projections of Florida
Population by County,2025-2045.
In addition to the factors provided above,an average 2020 wastewater generation rate of
65 gallons per capita per day(gpcd)was calculated for Winter Springs, based on the`even split'
assumption between the East and West WRF.The 65 gpcd is also consistent with the per capita
rates used within the"City of Winter Springs 2022 Wastewater and Reclaimed Water Master
Plan"prepared by Kimley-Horn.The calculated per capita wastewater generation rate is slightly
less than the typical industry standard range of 70 to 80 gpcd for residential communities but
aligns with the City's development projections.
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