Town Hall Presentation The Cayucos Sustainable Water Project January 14, 2016 Cayucos Sustainable Water Project
Presentation Overview – Project Introduction & Charter – Wastewater Characterization – Beneficial Use – Site Constraint Analysis – Wastewater Collection System Evaluation – Funding & Financing – Next Steps Cayucos Sustainable Water Project 2
Cayucos Sustainable Water Project 3
Background • Regional Water Quality Control Board (RWQCB) upgrade requirements for MBCSD WWTP • California Coastal Commission denial of Coastal Development Permit • State Water Resource Control Board (SWRCB) Recycled Water Policy – Statewide Recycled Water Mandates by 2020 • Cayucos Water Resource Recovery Facility provides: – Community Sustainability – Ownership – Local Governance Cayucos Sustainable Water Project 4
Project Charter Vision – Provide Cayucos with efficient, reliable and adaptable wastewater treatment, while producing a high quality water supply to benefit the community. Mission - To deliver a sustainable and cost-effective water resource recovery system for the community of Cayucos within a streamlined schedule. Cayucos Sustainable Water Project 5
Wastewater Characterization Cayucos Sustainable Water Project 6
Wastewater Flows Historical Flow 1 , Projected Flows 2 , Averaging Period gal/day gal/day Average Annual 259,000 290,000 Daily Flow (AADF) Maximum Week 814,000 927,000 1 Based on flows at Lift Station 5 from 2008-2014 2 Preliminary analysis based on historical flow contribution by service connection and anticipated future service connections Cayucos Sustainable Water Project 7
Water Quality Analysis • Key Parameters – Biological Oxidation Demand (BOD) – Ammonia – Total Suspended Solids (TSS) Cayucos Sustainable Water Project 8
Beneficial Use Cayucos Sustainable Water Project 9
Current Water Supply Whale Rock Nacimiento Exchange Reservoir Water Cayucos Water Treatment Plant Groundwater Urban Demand Cayucos Sustainable Water Project 10
How can we use our recycled water? Irrigation Direct Potable Indirect Potable Reuse (DPR) Reuse (IPR) Unrestricted Landscape Irrigation Groundwater Replenishment Beneficial For distribution into the Uses public water system Surface Water Augmentation Irrigation of Food Crops – Reservoir replenishment Tertiary Treatment + Full Advanced Treatment + Blending Treatment Tertiary Treatment Conventional Surface Water Level Treatment Full Advanced Treatment Cayucos Sustainable Water Project 11
Wastewater Treatment Process Overview Unrestricted Potable Reuse Irrigation Cayucos Sustainable Water Project 12
Primary Treatment — Headworks to remove large suspended material and grit — Primary clarification (settling) to remove solids Cayucos Sustainable Water Project 13
Secondary Treatment • Biological treatment for removal of organic and inorganic contaminants • Secondary clarification (settling) to remove biomass Cayucos Sustainable Water Project 14
Tertiary Treatment • Filtration to remove suspended particles • Disinfection to inactivate pathogens Cayucos Sustainable Water Project 15
Full Advanced Treatment • Membrane filtration to remove pathogens and suspended material • Reverse osmosis to remove dissolved contaminants • UV + oxidant to oxidize remaining trace organic contaminants Cayucos Sustainable Water Project 16
Outfall Force Main • District owns 35% of outfall capacity • Provides District with operating flexibility to manage: – Peak flows Gravity Main – Salts & nutrients Outfall Cayucos Sustainable Water Project 17
Site Constraint Analysis Cayucos Sustainable Water Project 18
Rough Screening Evaluation 12 Candidate Sites were selected for rough screening evaluation based on: Primary Site Selection Criteria: – Outside the Coastal Zone Boundary – Located in the three creek valleys: Toro Creek, Willow Creek and Cayucos Creek. – Located Outside FEMA Flood Zone – Site is not visible from State Route 1 Cayucos Sustainable Water Project 19
12 ROUGH SCREENING SITES 6 1 7 8 9 2 3 10 11 12 5 4 Cayucos Sustainable Water Project 20 2 0
Rough Screening Evaluation These questions were used to further narrow the candidate sites with the best potential to meet the project objectives. Rough Screening Criteria 1. Has the property owner shown interest? 2. Does the property lend itself to creation of a site of suitable proportions and slope? 3. Does the site offer a unique opportunity to fulfill the project objectives? 4. Compared to other candidate sites in the same creek canyon, is the site a reasonable distance from existing infrastructure? Cayucos Sustainable Water Project 21
Site 1 CAYUCOS CREEK Site 2 CAYUCOS CREEK Site 3 WILLOW CREEK FINAL 5 CANDIDATE SITES Site 4/5 TORO CREEK 22
Site 1: CAYUCOS CREEK Cayucos Creek Cayucos Creek Road General Site Info: • Parent Parcel: 161 acres • Currently in agricultural production, irrigation infrastructure in place for beneficial use of treated water for agriculture. Key Map Cayucos Sustainable Water Project 23
Site 2: CAYUCOS CREEK Key Map Cayucos Creek General Site Info: • Parent Parcel: 87 acres Cayucos Creek Road • Adjoining same-owner parcels abutting Whale Rock reservoir for potential surface water Cayucos Sustainable Water Project 24 augmentation.
Site 3: Willow Creek Old Creek Road Willow Creek Montecito Road General Site Info: • Parent Property 215 acres • Adjoining same-owner parcels abutting Whale Rock reservoir for potential surface water augmentation. • The site is current agricultural production with irrigation infrastructure Key Map Cayucos Sustainable Water Project 25 in place.
Sites 4 & 5 Toro Creek Toro Creek Key Map Site 5 Site 4 Toro Creek Road General Site 4 & 5 Info: • Parent Parcel 76 acres • Both sites have the benefit of using gravity infrastructure for Cayucos Sustainable Water Project 26 collection .
Key Environmental & Regulatory Issues Four factors have been identified in this screening-level stage to determine the relative strengths and weaknesses of the selected five candidate sites. Geologic Hazards Biologic Resources Agricultural Resources Cultural Resources Cayucos Sustainable Water Project 27
Site 1 Cayucos Creek Geologic Minor Hazard Biologic Creek Proximity, Access Resources Monitor Cultural Construction Resources Prime Soil, Agriculture Ag Preserve Cayucos Sustainable Water Project 28
Site 2 Cayucos Creek Geologic Minor Hazard Biologic Creek Proximity, Native Grassland Resources Cultural None Resources Agriculture Grazing Cayucos Sustainable Water Project 29
Site 3 Willow Creek Geologic Minor Hazard Biologic Creek Proximity, Resources Access Cultural None Resources Prime Soil Agriculture 30 Cayucos Sustainable Water Project
Site 4 Toro Creek Geologic Landslide, Hazard Fault Biologic Site 5 Creek Proximity, Resources Access Cultural Monitor Resources Construction Agriculture Grazing Site 4 Cayucos Sustainable Water Project 31
Site 5 Toro Creek Geologic Minor Hazard Site 5 Biologic Creek Proximity Resources Monitor Cultural Construction Resources Prime Soil Agriculture Site 4 Cayucos Sustainable Water Project 32
CANDIDATE SITE COMPARISON Cayucos Cayucos Willow Toro Toro 1 4 5 2 3 Creek Creek Creek Creek Creek Geologic Minor Minor Minor Minor Landslide, Fault Hazard Biologic Creek Proximity, Creek Proximity, Creek Proximity, Creek Proximity Creek Proximity Access Native Grassland Access Resources Cultural Monitor Monitor Monitor None None Construction Construction Construction Resources Prime Soil, Agriculture Grazing Prime Soil Grazing Prime Soil Ag Preserve Cayucos Sustainable Water Project 33
“SHORT LIST” CANDIDATE SITES SITE 2 CAYUCOS CREEK SITE 3 WILLOW CREEK Cayucos Sustainable Water Project SITE 5 TORO CREEK 34 3 4
Conceptual Rendering Showing Visual Screening of Candidate Sites Conceptual models have been developed to show how the proposed project may appear in context of Site 2, Site 3 and Site 5. Concept Rendering Process: 1. Photograph Existing View 2. Develop conceptual model of a prototypical facility and place model into site using proper perspective 3. Simulate landscape screening to provide a view of future conditions and mature screening. Cayucos Sustainable Water Project 35
V I S U A L S I M U L A T I O N S I T E 2 EXISTING VIEW
C O N C E P T U A L R E N D E R I N G S I T E 2 FACILITY MODEL VIEW
C O N C E P T U A L R E N D E R I N G S I T E 2 MATURE LANDSCAPE
C O N C E P T U A L R E N D E R I N G S I T E 3 EXISTING VIEW
C O N C E P T U A L R E N D E R I N G S I T E 3 FACILITY MODEL VIEW
C O N C E P T U A L R E N D E R I N G S I T E 3 MATURE LANDSCAPE
C O N C E P T U A L R E N D E R I N G S I T E 5 EXISTING VIEW
C O N C E P T U A L R E N D E R I N G S I T E 5 FACILITY MODEL VIEW
C O N C E P T U A L R E N D E R I N G S I T E 5 MATURE LANDSCAPE
Recommend
More recommend
