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CC 2019-08-27_10a Status Report Central Coast Blue Recycled Water_PP PresentationCentral Coast Blue Update Presentation – Arroyo Grande One Community. One Water. One Future. August 27, 2019 1 Presentation Overview   Why Central Coast Blue? Project Status Update Cost/Benefit Sharing Framework Next Steps/Project Schedule 2 Why Central Coast Blue? 3 Recent historic drought highlights vulnerabilities in Five Cities Region’s water supply portfolio Analysis of 40 years of inflow data indicates a long term decrease in inflow which resulted in the lowest recorded water in storage on record in 2016 A 1970 DWR Report identified a potential for seawater intrusion In 2009, evidence of an onshore flow of seawater was detected in two monitoring wells near Oceano 4 Groundwater Model Development NCMA developed a groundwater model to better understand the threat of seawater intrusion and how injection of reclaimed wastewater would impact the basin The model was also used to determine the impacts of reduced water supplies due to drought and increasing demands. 5 Supply/Demand Evaluation identified a water supply deficit in extend drought conditions 6 Supplemental supply fills supply deficit in drought years 7 Supplemental Water Supply Studies identified recycled water as the preferred alternative Recycled Water Alternatives Search for Recycled Water Alternative leads to Advanced Treatment and Groundwater Recharge Now we have an indirect potable reuse project Desal - Based on the 2008 study done by Arroyo Grande, Grover Beach, and Oceano CSD. The yield was 2,300 AFY. LL Spillway - Based on the 2013 Lopez Lake Spillway Raise Project Report. The spillway raise would result in a yield of 565 AFY. SWP - Based on the 2016 Technical Memorandum done by SLOCFC&WCD. The cost/AF is to deliver water to the Paso Basin. Delivery of water to the Lopez Pipeline would require purchase of additional capacity in additional downstream portions of the Coastal Branch Pipeline. Additionally, these cost estimates for SWP water do not account for potential increases in SWP costs associated with the California WaterFix. 8 Central Coast Blue will capture a water source that is currently wasted to the ocean to protect the groundwater basin and improve water supply reliability Advanced Water Treatment Disposal to Ocean Disposal to Ocean Existing Wastewater Treatment 9 Central Coast Blue will utilize recycled water injection to maintain sufficient groundwater elevations and offshore flow 10 Central Coast Blue is able to leverage existing infrastructure connecting the Pismo Beach and SSLOCSD’s WWTPs to collect water from both facilities Pismo and SSLOCSD WWTPs are connected via the existing outfall line Pismo and SSLOCSD WWTPs are connected via Pismo’s Land Outfall 11 Central Coast Blue is a regional project envisioned to be completed in 2 phases Phase 1 - Capture and treatment of water from Pismo Beach’s WWTP Anticipated treatment capacity of 1.3 MGD Phase 2 - Capture and treatment of water from SSLOCSD’s WWTP Anticipated total treatment capacity of ~5 MGD 12 Injection Wells Municipal Production Wells Seawater Intrusion Detected Seawater Intrusion Detected Municipal Production Wells 13 Central Coast Blue Injection Scenarios Phase 1 – Injection of approximately 1,100 AFY in 5 locations to protect groundwater supplies. Phase 2 – Construction of 2 new wells and injection of approximately 3,000 – 4,000 AFY to further protect the groundwater basin or delivery of recycled water for agriculture irrigation. Municipal Production Wells Municipal Production Wells 13 The Supply/Demand analysis indicates that Phase 1 is expected to be able to protect existing water supplies during extended drought. Implementation of Phase 2 may not be needed to address near-term water supply shortages. Phase 2 implementation will likely depend upon a number of factors: Climate change impacts on local and statewide hydrology Resilience of other water supply sources (i.e. Lopez and State Water) Agricultural interest in supplemental water Ability to transfer/sell surplus water to other water purveyors when available Effectiveness of Phase 1 at maintaining sufficient groundwater elevations Future water demand for the participating and/or neighboring agencies 14 Central Coast Blue Project Update 15 Central Coast Blue is currently in the preliminary engineering phase prior to releasing the EIR for public comment 16 Advanced Treatment Facility Siting Project team is evaluating both onsite (SSLOCSD) and offsite alternatives for the Advanced Water Treatment Facility Both alternatives will be evaluated as co-equal alternatives in the EIR Offsite location is being pursued in Grover Beach 17 Updated cost estimates represent the best available estimates for the onsite (SSLOCSD) Advanced Water Purification Facility alternative. These costs will likely change as the project evolves and therefore a range of costs are presented Estimated accuracy range of -20% to +30% based on best available information of actual costs from similar projects Updated Project Cost Estimates developed to inform funding/financing evaluations Assumptions: 1. Treatment Facility includes costs for building and storage facilities sized for Phase 2. 2. Cost estimate range developed using Association for the Advancement of Cost Engineering Cost Estimate Classification (-20% to +30%) and the Advanced Treatment Facility with and without Boron Removal. 3. Annual Capital Payment assumes 5% financing over 30 years. 4. Unit cost based on a range of 1.0 to 1.44 increase in groundwater yield associated with the project, based on groundwater modeling results. 18 Cost/Benefit Sharing Framework 19 Interagency collaboration has been key to project success to date Groundwater Model EIR Preliminary Engineering 20 Funding Sources under Evaluation Water: Water Rates Grant/ Low Interest Financing Prop 1 GWGP Title XVI CWSRF Wastewater: Wastewater Rates Costs split between water and wastewater agencies Outside funding pursued to reduce costs to water and wastewater customers. 21 Proposed Cost Sharing Framework Wastewater split based on flow Water split based on Groundwater Allocations Water/Wastewater split based on benefit to Wastewater agencies 22 Grant Funding Update Prop 1 Groundwater Grant Program Round 1 - Awarded $2M in planning grant funding Round 3 Central Coast Blue to apply for implementation funding in Round 3 Eligible for up to 50% of implementation costs Key schedule driver as Funding Agencies want to see significant progress between planning and implementation grants Title XVI Preliminary award of ~$800k in planning grant funds Funds 25% of Final Design, Program Management, Value Engineering Project eligible to apply for implementation funding in subsequent rounds 23 Next Steps/Project Schedule 24 Upcoming Critical Stakeholder Agency Decision Points Development of final project benefit participation and cost sharing agreements (this includes South San Luis Obispo County Sanitation District participation) Individual agency participation percentages in capital and operations and maintenance costs Development of a project governance structure Potential water and or wastewater rate increases -Proposition 218 hearings Mechanisms to reconcile costs paid to to-date relative to level of participation in the project 25 Groundwater Modeling, Preliminary Design, Technology Piloting, **Community Connection** Operations Begins Closer to Water Independence Construction Kick Off Preliminary Design & Environmental Review Begin Public Participation & Comments Advanced Treatment Design Site Selection; Test Injection Well 2016 – current Extensive and thorough planning and collaboration Final Design and Permitting Phase 1 Project Schedule 26 One Community. One Water. One Future. 27 The groundwater model identified pathways for seawater intrusion in the lower Paso Robles and upper Careaga formations The calibrated model predicted onshore subsurface inflow in these geologic layers at times corresponding to detection of seawater intrusion in 2009 28