Tour of w and ww systems 3 15-11
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Transcript of Tour of w and ww systems 3 15-11
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Tour of Water and Wastewater Systems
Graham Wadsworth
Town of Yountville
Public Works Department
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Introduction
• Water System
• Wastewater System
• Expenses
• Revenue
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Water System
• Source
• Treatment
• Transmission
• Distribution
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Yountville
Veterans Home
Napa River
Highway 29
Silverado TrailWineries
Rector Watershed
Rector Watershed
Yountville
Lake Berryessa
Joint Treatment Plant
Recycled Water Users
Napa River
Napa River
Highway 29
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Water Sources
• Rector Reservoir
• Lake Hennessey / Conn Dam
• Emergency Well
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Rector Reservoir
Dam
Silverado T
rail
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Rector Water Treatment Plant
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Rector Dam and Treatment Plant
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Water Distribution System
• Fire Hydrant Flushing Program
• Cross Connection Prevention Program
• Water Meter Reading
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Water Distribution System
• Sampling, Testing and Reporting
• Water Conservation and Rebates
• Replace Water Lines and Meters
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Water Pipelines
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Fire Hydrant Flushing
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Back Flow Prevention Device
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Wastewater System
• Collection
• Treatment
• Disposal
• Recycled Water System
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Wastewater Collection System
• Reduce Inflow of Rainwater and Infiltration of Groundwater
• Sewer System Management Plan
• Maintain and Improve Pump Station
• Replace Sewer Pipes
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Smoke Testing
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Sewer Manhole Coating
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Sewer Line Cleaning
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Wastewater Pump Station
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Pipe Replacement
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Levels of Treatment
• Primary
• Secondary
• Tertiary
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Joint Treatment Plant
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Joint Treatment Plant
Effluent Pond
Primary
SecondaryFinal
Chlorine Contact
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Control Panel
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Primary Sedimentation Tank
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Sludge Digester
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Primary Trickling Filter
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Secondary Sedimentation Tank
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Secondary Trickling Filter
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Solids Contact Chamber
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Final Sedimentation Tank
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Fuzzy Filter
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Chlorine Contact Chamber
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Effluent Pond
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Effluent Discharge
• Napa River during Wet Season
• Recycled Water Users during Dry Season
• Recycled 43% of Effluent in 2004
• Recycled 83% of Effluent in 2009
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Yountville
Veterans Home
Napa River
Highway 29
Silverado TrailWineries
Rector Watershed Views Looking East
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Vintner’s Golf Course
Joint TreatmentPlant
Effluent Pond
Sludge Drying Ponds
Highw
ay 29
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Mondavi Recycled Water Pond
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Operating Expenses
• Purchase of Water
• Salaries and Benefits
• Electricity and Gas
• Contract Services
• Chemicals
• Equipment Maintenance
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Capital Improvement Expenses
• Recycled Water Project
• Improvements to Joint Treatment Plant
• Replace Water and Wastewater Pipes
• Replace Water Meters and Blow Offs
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Revenues
• Water Enterprise Fund
• Wastewater Enterprise Fund
• Veterans Home for Joint Treatment Plant
• Recycled Water Sales
• Developer Impact Fees for Capital Improvements
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Conclusion
• Provide Safe, Clean and Reliable Water
• Minimize Pollution to the Napa River
• Minimize Expenses
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Questions and Answers