Akron Water Pollution Control Station No Feasible Alternative

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4.5. WPCS Storage ..................................................................................... 4-26 4.5.1. Existing Conditions..................................................................... 4-26 4.5.2. WPCS Storage Alternatives ....................................................... 4-26 4.5.3. Feasibility Analysis of WPCS Storage........................................ 4-27 4.5.4. Summary.................................................................................... 4-27 4.6. Additional Treatment (Secondary Bypass Treatment) .......................... 4-28 4.6.1. Pilot Testing Summary ............................................................... 4-28 4.6.2. Pilot Test Treatment Objectives ................................................. 4-29 4.6.3. Feasibility Analysis of Additional Treatment............................... 4-31 4.6.4. Solids Process Impacts.............................................................. 4-33 4.6.5. Summary.................................................................................... 4-33 4.7. Alternatives Summary........................................................................... 4-34 5. ALTERNATIVE SCREENING ............................................................................... 5-1 5.1. Alternative Costs..................................................................................... 5-1 5.2. Alternatives Analysis............................................................................... 5-2 5.2.1. Screening..................................................................................... 5-2 5.2.2. Cost-Benefit Analysis................................................................... 5-3 5.3. Summary of Recommended Alternative ................................................. 5-7 6. CONCLUSIONS AND RECOMMENDATIONS..................................................... 6-1 6.1. Proposed Plan ........................................................................................ 6-1 6.2. Benefit..................................................................................................... 6-1 6.3. No Feasible Alternative........................................................................... 6-1 7. BIBLIOGRAPHY ................................................................................................... 7-1 APPENDICES A. Stress Test Reports A-1. 1993 Stress Test A-2. 1997 Stress Test A-3. 2006 Stress Test B. Secondary Treatment Alternatives Cost Estimates C. Secondary Treatment Present Worth Analysis Page ii
TABLES Akron Water Pollution Control Station No Feasible Alternative (NFA) LIST OF TABLES AND FIGURES Page No. 3-1 1994 Modified NPDES Permit Effluent Discharge Limits.................................... 3-2 3-2 2005 Performance of Akron WPCS .................................................................... 3-3 3-3 Akron WPCS Existing Design Data Summary .................................................... 3-4 3-4 Secondary Treatment Facilities Limitations ........................................................ 3-5 4-1 Summary of Integrated Alternative #2 CSO Control Technology........................ 4-2 4-2 Secondary Treatment System Loadings............................................................. 4-4 4-3 1994 Akron WPCS Influent Flow ........................................................................ 4-4 4-4 Akron WPCS Average Influent Flow................................................................... 4-5 4-5 Secondary Treatment Alternatives Performance Summary.............................. 4-10 4-6 Sewer Separation Capital Costs....................................................................... 4-15 4-7 Six Potential Control Options at Rack 12.......................................................... 4-21 4-8 Summary of Original 1998 Cost Analysis for Akron Racks............................... 4-22 4-9 Summary of 1998 Plan Cost Development Methodologies............................... 4-24 4-10 Storage Basin Alternatives Benefit Summary ................................................... 4-27 4-11 Akron WPCS Wastewater Characteristics........................................................ 4-30 4-12 Pilot Unit Performance Summary ..................................................................... 4-30 4-13 HRT Design/Operational Considerations.......................................................... 4-31 4-14 Secondary Bypass EHRC Alternatives Benefit Summary................................. 4-32 4-15 WPCS Annual Bypass Volumes Under Various Secondary Treatment Alternatives...................................................................................... 4-35 5-1 WPCS Secondary Bypass Alternatives Project Costs ........................................ 5-1 5-2 WPCS Secondary Bypass Alternatives Present Worth Cost .............................. 5-2 5-3 WPCS Secondary Bypass Alternatives Water Quality Benefits.......................... 5-3 5-4 WPCS Secondary Bypass Alternatives CBOD5 Removal Cost .......................... 5-4 5-5 WPCS Secondary Bypass Alternatives Volume Removed Cost......................... 5-4 FIGURES 3-1 Site plan...................................................................................Following Page 3-16 3-2 Flow Schematic Diagram.........................................................Following Page 3-16 4-1 Alternative 1 – 120 MGD Operation.........................................Following Page 4-35 4-2 Alternative 2A – 40 MGD Additional FSTs...............................Following Page 4-35 4-3 Alternative 2B – 80 MGD Additional FSTs...............................Following Page 4-35 4-4 Alternative 3A – 170 MGD HRT-FST Effluent..........................Following Page 4-35 4-5 Alternative 3B – 210 MGD HRT-FST Effluent..........................Following Page 4-35 4-6 Alternative 4A – 40 MGD Membrane Filtration of Mixed Liquor ........................................................................Following Page 4-35 4-7 Alternative 4B – 80 MGD Membrane Filtration of Mixed Liquor ........................................................................Following Page 4-35 Page iii
Page 1 and 2: City of Akron Akron Water Pollution
Page 3: Akron Water Pollution Control Stati
Page 7 and 8: Akron Water Pollution Control No Fe
Page 9 and 10: SECTION 1 EXECUTIVE SUMMARY The pur
Page 11 and 12: SECTION 2 INTRODUCTION 2.1. NFA Rep
Page 13 and 14: 150 MGD due to their hydraulics. Th
Page 15 and 16: SECTION 3 EXISTING WPCS CAPABILITIE
Page 17 and 18: Month Raw Influent Flow Table 3-2 2
Page 19 and 20: Table 3-3 (con’t) Akron WPCS Exis
Page 21 and 22: 3.3. Secondary Treatment Limitation
Page 23 and 24: The hydraulic evaluation prepared a
Page 25 and 26: • final settling tank influent di
Page 27 and 28: • The simulated 120 MGD test leve
Page 29 and 30: Table 3-4 Secondary Treatment Facil
Page 33 and 34: SECTION 4 EVALUATION OF ALTERNATIVE
Page 35 and 36: 5. Summarize high-rate treatment pi
Page 37 and 38: Table 4-4 Akron WPCS Average Influe
Page 39 and 40: For these reasons the Group 2 Alter
Page 41 and 42: effluent pumping and fine screening
Page 43 and 44: The 3-year solids production rate a
Page 45 and 46: The 120 MGD alternative requires fu
Page 47 and 48: The City of Akron has previously pe
Page 49 and 50: Type of Cost Capital O&M Present Wo
Page 51 and 52: ed), exhaust fans, and associated d
Page 53 and 54: 6. For each Rack, the minimum perfo
Page 55 and 56:
Rack # CBOD Present Worth ($) Table
Page 57 and 58:
CSO Control Technology Tunnels Tabl
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• 20 MG of storage located near p
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ecirculated back to the reactor tan
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Table 4-13 HRT Design/Operational C
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is its chemical coagulant and polym
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Secondary Treatment Alternative "No
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Final Settling Tanks Qp = 110 MGD 1
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High Rate Treatment Qp = 110 MGD (B
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Membrane Filters Qp = 110 MGD (Bypa
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Modify Aeration Basins with MBR Qp
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10 MG Storage 10 MG Storage 10 MG S
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SECTION 5 ALTERNATIVE SCREENING 5.1
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For the cost and non-cost reasons n
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enefit analysis, it is recommended
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5.3. Summary of Recommended Alterna
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SECTION 7 BIBLIOGRAPHY 1. The Akron
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ATTORNEY/CLIENT PRIVILEGE ATTORNEY
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Akron Water Pollution Control Stati
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cfs cubic feet per second DO dissol
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SECTION 2 INTRODUCTION The Akron Wa
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4. The Stress Test proceeded as fol
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SECTION 4 STRESS TEST TRIALS 4.1. S
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4.2. Simulated 144 MGD Test The pro
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Based on observations and results o
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phosphorus. The apparent ineffectiv
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Concentration (mg/l) 10.0 9.0 8.0 7
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TABLE 4-2 AKRON WPCS STRESS TEST Si
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SECTION 5 CONCLUSIONS AND RECOMMEND
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Appendix A City-Provided WPCS Data
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AKRON WPCS 2006 120 MGD STRESS TEST
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20-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
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20-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
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20-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
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AKRON WPC 2006 144 MGD STRESS TEST
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28-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
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28-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
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28-Nov-06 # 1 ML # 2 ML # 1 RAS # 2
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AKRON WPC 2006 120/132 MGD STRESS T
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5-Dec-06 # 1 ML # 2 ML # 1 RAS # 2
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5-Dec-06 # 1 ML # 2 ML # 1 RAS # 2
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Cost Development Guidelines Appendi
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ALTERNATIVE 1C - 10 MGD SINGLE UNIT
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ALTERNATIVE 1E - 100 MGD UNITS PROB
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APPENDIX C Secondary Treatment Pres
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annually. The effort for the 40 MG
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Akron WPCS NFA Alternative 1 -Secon
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Akron WPCS NFA Alternative 1 -Secon
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Akron WPCS NFA Alternative 1A 20 MG
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Akron WPCS NFA Alternative 1A 20 MG
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Akron WPCS NFA Alternative 1B 40 MG
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Akron WPCS NFA Alternative 1B 40 MG
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Akron WPCS NFA Alternative 1C 10 MG
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Akron WPCS NFA Alternative 1C 10 MG
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Akron WPCS NFA Alternative 1D 50 MG
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Akron WPCS NFA Alternative 1D 50 MG
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Akron WPCS NFA Alternative 1E 100 M
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Akron WPCS NFA Alternative 1E 100 M
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Akron WPCS NFA Alternative 1F 150 M
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Akron WPCS NFA Alternative 1F 150 M
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Akron Water Pollution Control Station No Feasible Alternative

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