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