Final Draft
Wastewater Master
Plan Review
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Why Now?
Wastewater Master Plans typically updated every 5 years Last WQCF Updated in 2006
Last Collection System Updated in 2013
2021 Stantec
Evaluate historic and existing wastewater flows
Refine collection system performance and planning criteria Build and calibrate system hydraulic models
Evaluate current and future needs for collection and treatment Develop a CIP program to address current and future needs ATTACHMENT 1
Service Area
• Portions of Lathrop
• Oakwood Shores
• Raymus Village
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Current Collection System
• PCSWMM
- GIS data
- Meter data + flow monitoring
- Field data collection (18 sites)
- Model calibration
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CS Future
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WQCF History
• Operation in 1959
• Phase III upgrades,
based on 2006 Master
Plan
• ADWF = 9.87 MGD
• AAFs = 7.13 MGD
• AAFc = 8 MGD
• NPDES expires 2025
CV-Salts & Thermal
Compliance
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Historic WQCF Flow
• Drought &
Conservation
• Nutrient Limit
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Future WQCF Flow & Loads
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Projected WQCF Flow
• Interim Improvement
8.23 MGD
• Phase IVs1 = +4.65MGD
• Phase IVs2 = +4.65MGD
• Total 17.5 MGD
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Phase IV Improvements
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Funding Needs
• Collection System
Ex. Cap = $12.13M
Prev. ID = $63.15M
On R&R = $2.318M
Future = $144.53M
• WQCF
Ex. Imp = $79.595M
Stage 1 = $146.306M
Stage 2 = $70.587M
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THANK YOU!
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