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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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Los Osos Community Los Osos Community Services DistrictServices District
Basin Management Planning and Basin Management Planning and Proposed Work Program Proposed Work Program
June 5, 2008June 5, 2008
BackgroundBackground
Los Osos Groundwater Basin Supplies Water to:Los Osos Groundwater Basin Supplies Water to: LOCSDLOCSD Golden State Water CompanyGolden State Water Company S&T Mutual Water CompanyS&T Mutual Water Company Other Ag and Private WellsOther Ag and Private Wells
Groundwater Recharge Comes from Many Sources Groundwater Recharge Comes from Many Sources Including:Including: Rainfall Rainfall Creeks Creeks Irrigation return flowIrrigation return flow Septic System DischargeSeptic System Discharge Leakage from Other Aquifer ZonesLeakage from Other Aquifer Zones
Background, Cont.Background, Cont.
Safe Yield - the Amount of Well Pumping that Safe Yield - the Amount of Well Pumping that Maintains Groundwater Levels Safely Above Sea Maintains Groundwater Levels Safely Above Sea Level, Even During Dry PeriodsLevel, Even During Dry Periods
If Exceeded, Sea Water Becomes an Unlimited Source If Exceeded, Sea Water Becomes an Unlimited Source of Unwanted Rechargeof Unwanted Recharge
Deeper Zones are More Prone to IntrusionDeeper Zones are More Prone to Intrusion The Lower Aquifer Currently Supplies 77% of the The Lower Aquifer Currently Supplies 77% of the
Water Delivered by the Three Water PurveyorsWater Delivered by the Three Water Purveyors Much of the Upper Aquifer is High in Nitrates, Blending Much of the Upper Aquifer is High in Nitrates, Blending
or Treatment is Requiredor Treatment is Required
Area of Sea Water
Intrusion into Lower
Aquifer
LOCSD
Palisades
Well
Sand SpitDowntown Creek
Upper Aquifer (Zone C)
Lower Aquifer (Zone D)
Lower Aquifer (Zone E)
Bedrock
0
-700
Background, Cont.Background, Cont.
Los Osos Groundwater Basin is Broken into Two Los Osos Groundwater Basin is Broken into Two CompartmentsCompartments Urban Area – Comprised of the East and West CompartmentUrban Area – Comprised of the East and West Compartment Creek CompartmentCreek Compartment
ISJ AgreementISJ Agreement
September 2007 - Water Purveyors and September 2007 - Water Purveyors and the County of SLO Entered into an ISJ the County of SLO Entered into an ISJ AgreementAgreement
ISJ – Interlocutory Stipulated JudgmentISJ – Interlocutory Stipulated Judgment Equitable Sharing of Costs Related to Equitable Sharing of Costs Related to
Data Gathering and Analysis, and Data Gathering and Analysis, and Development and Implementation of the Development and Implementation of the Basin Management PlanBasin Management Plan
ISJ MeetingsISJ Meetings
ISJ Group Members have been Meeting ISJ Group Members have been Meeting MonthlyMonthly
A Mutually-Agreeable Work Program has A Mutually-Agreeable Work Program has been developed that:been developed that: Meets the Intentions of the ISJ Meets the Intentions of the ISJ Maintains a Schedule that Facilitates Timely Maintains a Schedule that Facilitates Timely
Input Into the County Wastewater ProjectInput Into the County Wastewater Project
ISJ Meetings, ContISJ Meetings, Cont
County Applied for a $250,000 County Applied for a $250,000 Department of Water Resources GrantDepartment of Water Resources Grant To Partially Fund ISJ Group EffortsTo Partially Fund ISJ Group Efforts Application Did Not Receive FundingApplication Did Not Receive Funding
Cooperative Efforts Between ISJ Group Cooperative Efforts Between ISJ Group Pursue Water Conservation Education Pursue Water Conservation Education
ProgramsPrograms Inter-ties Between Purveyor Distribution Inter-ties Between Purveyor Distribution
SystemsSystems
Undeveloped PropertyUndeveloped Property
In July, 2007, the County adopted a policy In July, 2007, the County adopted a policy relating to wastewater assessments for vacant relating to wastewater assessments for vacant propertiesproperties
A second wastewater assessment vote will be A second wastewater assessment vote will be held for vacant and underdeveloped propertiesheld for vacant and underdeveloped properties
Water supply and infrastructure projects Water supply and infrastructure projects necessary to serve development may be necessary to serve development may be includedincluded
Funding from proceeds of the assessment vote Funding from proceeds of the assessment vote can reimburse purveyors for costs relating to can reimburse purveyors for costs relating to development development
Work ProgramWork Program
Steps Required to Reach the Goal of the Steps Required to Reach the Goal of the ISJ – Prepare a Basin Management PlanISJ – Prepare a Basin Management Plan Analyze the Existing Condition of the Analyze the Existing Condition of the
Groundwater BasinGroundwater Basin Assess various methods for maximizing Assess various methods for maximizing
basin resources, including conservationbasin resources, including conservation Evaluate the potential benefits of various Evaluate the potential benefits of various
wastewater disposal optionswastewater disposal options
Work ProgramWork Program
Steps Required to Reach the Goal of the Steps Required to Reach the Goal of the ISJ – Prepare a Basin Management PlanISJ – Prepare a Basin Management Plan Analyze the Existing Condition of the Analyze the Existing Condition of the
Groundwater BasinGroundwater Basin Assess various methods for maximizing Assess various methods for maximizing
basin resources, including conservationbasin resources, including conservation Evaluate the potential benefits of various Evaluate the potential benefits of various
wastewater disposal optionswastewater disposal options
Work ProgramWork Program
Goals of the Work ProgramGoals of the Work Program Define improvements and related costs that are Define improvements and related costs that are
necessary to achieve a balanced basin under necessary to achieve a balanced basin under current demandcurrent demand
Explore opportunities for increasing the efficient, Explore opportunities for increasing the efficient, sustainable use of the basin with the County’s sustainable use of the basin with the County’s wastewater projectwastewater project
Define improvements and related costs necessary Define improvements and related costs necessary to achieve build out without importing waterto achieve build out without importing water
Provide input to the County for wastewater project Provide input to the County for wastewater project decisions and the future vacant property decisions and the future vacant property assessment voteassessment vote
Work Program, Cont.Work Program, Cont.
Proposed Program in Five Tasks (Tasks 1, 2, and 3, Proposed Program in Five Tasks (Tasks 1, 2, and 3, Staff is Requesting to Proceed with at this Time)Staff is Requesting to Proceed with at this Time)
Task 1 Task 1 Update Steady State Hydraulic Model Update Steady State Hydraulic Model Adjust Build-out Projections of the Basin Water Demand, Adjust Build-out Projections of the Basin Water Demand,
including water conservationincluding water conservation Preliminary Evaluation of Nitrate Removal UnitPreliminary Evaluation of Nitrate Removal Unit Assess the potential of the upper aquifer before and after the Assess the potential of the upper aquifer before and after the
wastewater projectwastewater project Task 2Task 2
Evaluate and Determine Creek Compartment Safe YieldEvaluate and Determine Creek Compartment Safe Yield Perform Sampling Analysis for Water Quality of Creek Perform Sampling Analysis for Water Quality of Creek
CompartmentCompartment
Work Program, Cont.Work Program, Cont.
Task 3Task 3 Prepare Groundwater Basin Infrastructure Master Prepare Groundwater Basin Infrastructure Master
PlanPlan Evaluate Groundwater Recharge OpportunitiesEvaluate Groundwater Recharge Opportunities Evaluate Options for Beneficial Re-Use of Evaluate Options for Beneficial Re-Use of
Reclaimed WaterReclaimed Water Prepare a Draft Basin Management PlanPrepare a Draft Basin Management Plan
Task 4 Task 4 Prepare a Transient, Dual-Density Hydraulic Model Prepare a Transient, Dual-Density Hydraulic Model
of the Groundwater Basinof the Groundwater Basin Task 5Task 5
Annual Groundwater MonitoringAnnual Groundwater Monitoring Transient Model Updates Every Two YearsTransient Model Updates Every Two Years
FundingFunding
Funding Sources for These Tasks Depend on Funding Sources for These Tasks Depend on the Objectivethe Objective
Tasks 1 & 2 Address Existing Deficiencies Tasks 1 & 2 Address Existing Deficiencies Related to Current DevelopmentRelated to Current Development Funded by the ISJ Group (Ultimately by Rate Funded by the ISJ Group (Ultimately by Rate
Payers)Payers) Percentage of Total Costs Based ISJ AgreementPercentage of Total Costs Based ISJ Agreement District Share – 39%District Share – 39%
Funding, Cont.Funding, Cont.
Task 3 Benefits Future Development, Task 3 Benefits Future Development, Task is Completed Prior to Assessment VoteTask is Completed Prior to Assessment Vote District to Fund Up Front CostsDistrict to Fund Up Front Costs Will be Reimbursed if Assessment Vote is Will be Reimbursed if Assessment Vote is
PassedPassed
Tasks 4 & 5 Benefit Future DevelopmentTasks 4 & 5 Benefit Future Development Tasks to Commence Following Secured Tasks to Commence Following Secured
Funding Source Funding Source
Work Program CostsWork Program Costs
District Share (39% of Work Program)District Share (39% of Work Program)
Task 1Task 1 $ 8,500$ 8,500 Task 2Task 2 $ 7,500$ 7,500 Task 3Task 3 $45,000$45,000 ContingencyContingency $10,000$10,000 TotalTotal $70,000$70,000
ScheduleSchedule
June 2008 through August 2008 – Water June 2008 through August 2008 – Water Purveyors Approve Work Program and Purveyors Approve Work Program and Authorize Consultants to Proceed with Authorize Consultants to Proceed with Tasks 1 & 2Tasks 1 & 2
August 2008 through February 2009 – August 2008 through February 2009 – Completion of Task 3Completion of Task 3
March 2009 – County’s 2March 2009 – County’s 2ndnd Proposition Proposition VoteVote
RecommendationsRecommendations
Board to Approve Funding of Purveyors Board to Approve Funding of Purveyors Basin Management Planning and Basin Management Planning and Proposed Work Program in Accordance Proposed Work Program in Accordance with the ISJ Agreementwith the ISJ Agreement
QuestionsQuestions