The New Maximum Benefit Paradigm. Common Issues with Other Basins and Other RWQCBs TDS, N and other water quality constituent objectives are common impediments.

The New Maximum The New Maximum Benefit ParadigmBenefit Paradigm

Common Issues with Common Issues with Other Basins and Other Other Basins and Other RWQCBsRWQCBs TDS, N and other water quality TDS, N and other water quality

constituent objectives are constituent objectives are common impediments to the use common impediments to the use of recycled and imported watersof recycled and imported waters

Regional Boards must issue Regional Boards must issue permits that implement their permits that implement their Basin PlansBasin Plans

The unused concept The unused concept from Executive Order from Executive Order 68-1668-16““1. Whenever the existing quality of water is 1. Whenever the existing quality of water is

better than the quality established in policies better than the quality established in policies as of the date on which such policies become as of the date on which such policies become effective, such existing high quality will be effective, such existing high quality will be maintained maintained until it has been until it has been demonstrated to the State that any demonstrated to the State that any change will be consistent with maximum change will be consistent with maximum benefit to the people of the State, will benefit to the people of the State, will not unreasonably affect present and not unreasonably affect present and anticipated beneficial use of such water anticipated beneficial use of such water and will not result in water quality less and will not result in water quality less than that prescribed in the policiesthan that prescribed in the policies.”.”

WC Section 13241WC Section 13241

“ “Each regional board shall establish such water quality objectives in Each regional board shall establish such water quality objectives in water quality control plans as in its judgment will ensure the reasonable water quality control plans as in its judgment will ensure the reasonable protection of beneficial uses and the prevention of nuisance; protection of beneficial uses and the prevention of nuisance; however, however, it is recognized that it may be possible for the quality of water to it is recognized that it may be possible for the quality of water to be changed to some degree without unreasonably affecting be changed to some degree without unreasonably affecting beneficial uses.beneficial uses. Factors to be considered by a Regional Board in Factors to be considered by a Regional Board in establishing water quality objectives shall include, but not necessarily establishing water quality objectives shall include, but not necessarily be limited to, all of the following:be limited to, all of the following:– (a) Past, present, and probable future beneficial uses of water.(a) Past, present, and probable future beneficial uses of water.– (b) Environmental characteristics of the hydrographic unit under (b) Environmental characteristics of the hydrographic unit under

consideration, including the quality of water available thereto.consideration, including the quality of water available thereto.– (c) Water quality conditions that could reasonably be achieved (c) Water quality conditions that could reasonably be achieved

through the coordinated control of all factors which affect waterthrough the coordinated control of all factors which affect water quality in the area.quality in the area.

– (d) Economic considerations.(d) Economic considerations.– (e) The need for developing housing within the region.(e) The need for developing housing within the region.– (f) The need to develop and use recycled water.”(f) The need to develop and use recycled water.”

Watermaster’s November Watermaster’s November 2002 Proposal2002 Proposal

Divide Chino Basin into three management Divide Chino Basin into three management zones – zones – Chino North, Chino EastChino North, Chino East and and Chino Chino SouthSouth

Based on WC Section 13241, set TDS and Based on WC Section 13241, set TDS and N objectives in Chino North toN objectives in Chino North to– maximize beneficial use of all water maximize beneficial use of all water

available to the basin including recycled available to the basin including recycled waterwater

– allow the recharge of state project water allow the recharge of state project water without mitigationwithout mitigation

What are the Causes of TDS What are the Causes of TDS and N Degradation in the Chino and N Degradation in the Chino Basin?Basin?

Returns from use from agriculture Returns from use from agriculture and urban water usesand urban water uses

Planned artificial rechargePlanned artificial recharge Same processes are occurring in Same processes are occurring in

almost all groundwater basinsalmost all groundwater basins

Figure 3Comparison of TDS Concentration Time Histories for

for the Chino North Management Zone

300

320

340

360

380

400

420

440

460

480

500

2000 2010 2020 2030 2040 2050 2060 2070 2080 2090 2100

TD

S C

on

cen

trat

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(m

g/L

)

Projection Based on Antidegradation

Objectives

Projection Based on OBMP

Watermaster and IEUA Watermaster and IEUA Commitments to Backup Commitments to Backup Maximum Benefit Based Maximum Benefit Based ObjectivesObjectives Recycled Water Management:Recycled Water Management:

– 12-month TDS and N effluent 12-month TDS and N effluent limitations of 550 mg/L and 8 mg/L limitations of 550 mg/L and 8 mg/L

– Commitment to serve the lowest Commitment to serve the lowest TDS supply available for potable TDS supply available for potable usesuses

– Minimize TDS waste incrementMinimize TDS waste increment

Basin Plan Requirements Basin Plan Requirements for Maximum Benefit Based for Maximum Benefit Based ObjectivesObjectives Future Chino Basin DesaltersFuture Chino Basin Desalters

– Started planning process for new Started planning process for new OBMP desalters in 2003 and have OBMP desalters in 2003 and have plan adopted and approved by Court plan adopted and approved by Court in 2007in 2007

– Other desalters will be added as Other desalters will be added as necessary as ambient TDS necessary as ambient TDS approaches the TDS objectiveapproaches the TDS objective

Basin Plan Requirements Basin Plan Requirements for Maximum Benefit Based for Maximum Benefit Based ObjectivesObjectives Basin-wide groundwater monitoring Basin-wide groundwater monitoring

for groundwater levels, TDS and for groundwater levels, TDS and nitrogen to assess ambient qualitynitrogen to assess ambient quality

Surface water discharge and quality Surface water discharge and quality monitoring to determine if monitoring to determine if Chino Chino NorthNorth groundwater is discharging groundwater is discharging into the Santa Ana Riverinto the Santa Ana River

Status of Basin Plan Status of Basin Plan AmendmentAmendment

Approved by:Approved by: RWQCB – January 2004RWQCB – January 2004 SWRCB – September 2004SWRCB – September 2004 OAL – December 2004OAL – December 2004

No negative comments through No negative comments through adoption processadoption process

Successful Successful Applications Outside Applications Outside the Chino Basinthe Chino Basin Cucamonga Management Zone – Cucamonga Management Zone –

Cucamonga Valley Water DistrictCucamonga Valley Water District Beaumont Management Zone – Beaumont Management Zone – San San

Timoteo Watershed Management Timoteo Watershed Management AuthorityAuthority

Yucaipa Management Zone – Yucaipa Management Zone – Yucaipa Valley Water DistrictYucaipa Valley Water District

San Timoteo Management Zone – San Timoteo Management Zone – STWMA & YVWDSTWMA & YVWD

What Did We Gain by What Did We Gain by Changing the WQ Changing the WQ Objectives?Objectives? Greater flexibility in water Greater flexibility in water

managementmanagement Maximized the use of recycled Maximized the use of recycled

waterwater Postponed construction of Postponed construction of

desalting facilities until they are desalting facilities until they are needed to protect beneficial usesneeded to protect beneficial uses

Minimized demand for State Minimized demand for State Project waterProject water

What Obligations Were What Obligations Were Incurred by Changing the Incurred by Changing the WQ Objectives?WQ Objectives? An increase in monitoringAn increase in monitoring Commitments are codified in the Commitments are codified in the

Basin PlanBasin Plan Retroactive mitigation if Retroactive mitigation if

commitments are not metcommitments are not met

Questions?Questions?