Los Osos Community Services District

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Los Osos Community Services District. Basin Management Planning and Proposed Work Program June 5, 2008. Background. Los Osos Groundwater Basin Supplies Water to: LOCSD Golden State Water Company S&T Mutual Water Company Other Ag and Private Wells - PowerPoint PPT Presentation

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<ul><li><p>Los Osos Community Services DistrictBasin Management Planning and Proposed Work Program </p><p>June 5, 2008</p></li><li><p>BackgroundLos Osos Groundwater Basin Supplies Water to:LOCSDGolden State Water CompanyS&amp;T Mutual Water CompanyOther Ag and Private WellsGroundwater Recharge Comes from Many Sources Including:Rainfall Creeks Irrigation return flowSeptic System DischargeLeakage from Other Aquifer Zones</p></li><li><p>Background, Cont.Safe Yield - the Amount of Well Pumping that Maintains Groundwater Levels Safely Above Sea Level, Even During Dry PeriodsIf Exceeded, Sea Water Becomes an Unlimited Source of Unwanted RechargeDeeper Zones are More Prone to IntrusionThe Lower Aquifer Currently Supplies 77% of the Water Delivered by the Three Water PurveyorsMuch of the Upper Aquifer is High in Nitrates, Blending or Treatment is Required</p></li><li><p>Area of Sea WaterIntrusion into LowerAquiferLOCSDPalisadesWell</p></li><li><p>Sand SpitDowntownCreekUpper Aquifer (Zone C)Lower Aquifer (Zone D)Lower Aquifer (Zone E)Bedrock0-700</p></li><li><p>Background, Cont.Los Osos Groundwater Basin is Broken into Two CompartmentsUrban Area Comprised of the East and West CompartmentCreek Compartment</p></li><li><p>ISJ AgreementSeptember 2007 - Water Purveyors and the County of SLO Entered into an ISJ AgreementISJ Interlocutory Stipulated JudgmentEquitable Sharing of Costs Related to Data Gathering and Analysis, and Development and Implementation of the Basin Management Plan</p></li><li><p>ISJ MeetingsISJ Group Members have been Meeting MonthlyA Mutually-Agreeable Work Program has been developed that:Meets the Intentions of the ISJ Maintains a Schedule that Facilitates Timely Input Into the County Wastewater Project</p></li><li><p>ISJ Meetings, ContCounty Applied for a $250,000 Department of Water Resources GrantTo Partially Fund ISJ Group EffortsApplication Did Not Receive FundingCooperative Efforts Between ISJ Group Pursue Water Conservation Education ProgramsInter-ties Between Purveyor Distribution Systems</p></li><li><p>Undeveloped PropertyIn July, 2007, the County adopted a policy relating to wastewater assessments for vacant propertiesA second wastewater assessment vote will be held for vacant and underdeveloped propertiesWater supply and infrastructure projects necessary to serve development may be includedFunding from proceeds of the assessment vote can reimburse purveyors for costs relating to development </p></li><li><p>Work ProgramSteps Required to Reach the Goal of the ISJ Prepare a Basin Management PlanAnalyze the Existing Condition of the Groundwater BasinAssess various methods for maximizing basin resources, including conservationEvaluate the potential benefits of various wastewater disposal options</p></li><li><p>Work ProgramSteps Required to Reach the Goal of the ISJ Prepare a Basin Management PlanAnalyze the Existing Condition of the Groundwater BasinAssess various methods for maximizing basin resources, including conservationEvaluate the potential benefits of various wastewater disposal options</p></li><li><p>Work ProgramGoals of the Work ProgramDefine improvements and related costs that are necessary to achieve a balanced basin under current demandExplore opportunities for increasing the efficient, sustainable use of the basin with the Countys wastewater projectDefine improvements and related costs necessary to achieve build out without importing waterProvide input to the County for wastewater project decisions and the future vacant property assessment vote</p></li><li><p>Work Program, Cont.Proposed Program in Five Tasks (Tasks 1, 2, and 3, Staff is Requesting to Proceed with at this Time)Task 1 Update Steady State Hydraulic Model Adjust Build-out Projections of the Basin Water Demand, including water conservationPreliminary Evaluation of Nitrate Removal UnitAssess the potential of the upper aquifer before and after the wastewater projectTask 2Evaluate and Determine Creek Compartment Safe YieldPerform Sampling Analysis for Water Quality of Creek Compartment</p></li><li><p>Work Program, Cont.Task 3Prepare Groundwater Basin Infrastructure Master PlanEvaluate Groundwater Recharge OpportunitiesEvaluate Options for Beneficial Re-Use of Reclaimed WaterPrepare a Draft Basin Management PlanTask 4 Prepare a Transient, Dual-Density Hydraulic Model of the Groundwater BasinTask 5Annual Groundwater MonitoringTransient Model Updates Every Two Years</p></li><li><p>FundingFunding Sources for These Tasks Depend on the ObjectiveTasks 1 &amp; 2 Address Existing Deficiencies Related to Current DevelopmentFunded by the ISJ Group (Ultimately by Rate Payers)Percentage of Total Costs Based ISJ AgreementDistrict Share 39%</p></li><li><p>Funding, Cont.Task 3 Benefits Future Development, Task is Completed Prior to Assessment VoteDistrict to Fund Up Front CostsWill be Reimbursed if Assessment Vote is PassedTasks 4 &amp; 5 Benefit Future DevelopmentTasks to Commence Following Secured Funding Source </p></li><li><p>Work Program CostsDistrict Share (39% of Work Program)</p><p>Task 1$ 8,500Task 2$ 7,500Task 3$45,000Contingency$10,000Total$70,000</p></li><li><p>ScheduleJune 2008 through August 2008 Water Purveyors Approve Work Program and Authorize Consultants to Proceed with Tasks 1 &amp; 2August 2008 through February 2009 Completion of Task 3March 2009 Countys 2nd Proposition Vote</p></li><li><p>RecommendationsBoard to Approve Funding of Purveyors Basin Management Planning and Proposed Work Program in Accordance with the ISJ Agreement</p></li><li><p>Questions</p></li></ul>