1 Discussion Topics Background Why consider this project? Water - - PowerPoint PPT Presentation

▶

Oct 26, 2022 172 likes •450 views

CarolloPaperTemplateWithLogo.pptx/ 1 Discussion Topics Background Why consider this project? Water Quality Spatial and temporal variability Process Selection and Design Cost Resource Utilization Efficiency

SLIDE 1

CarolloPaperTemplateWithLogo.pptx/

SLIDE 2

CarolloPaperTemplateWithLogo.pptx/

Discussion Topics

Background – Why consider this project?
Water Quality – Spatial and temporal variability
Process Selection and Design
Cost
Resource Utilization Efficiency
Conclusions

SLIDE 3

CarolloPaperTemplateWithLogo.pptx/

Brackish Water Extraction & Treatment Project Conceptual (diagrammatic – not to scale)

Brackish Water Extraction Well Field PV PTP  Extraction well field is source of water & barrier to further SWI  Disposal of brine in SMP  Brackish GW treatment for agric use is simpler than for potable use  Flexible operation

SLIDE 4

CarolloPaperTemplateWithLogo.pptx/

SLIDE 5

CarolloPaperTemplateWithLogo.pptx/

Dark Blue – saline Lt Blue – brackish Gray – slightly brackish to background

Lower part of UAS (~ Mugu aquifer)

SLIDE 6

CarolloPaperTemplateWithLogo.pptx/

The “Rule”: Raw Water Quality and Finished Water Goals Determine the Process

Raw Water Quality Finished Water Goals

Reverse Osmosis

Treatment Process

Electrodialysis Reversal

SLIDE 7

CarolloPaperTemplateWithLogo.pptx/

Raw Water Quality Data For Three Existing Wells Are Representative Of The Proposed Desalter Well Field Quality.

Raw Water Quality

Parameter

*Composite

Raw Water Composite Worst Case Raw Water

Chloride (mg/L Cl-) 3,228 4,843 Sodium (mg/L Na+) 1,077 1,615 Sulfate (mg/L SO4

2-)

812 1,218 Bicarbonate (mg/L

HCO3

)

246 369 Boron (mg/L B) 0.415 0.622 TDS (mg/L) 6,426 9,639 pH 7.14 7.14

* Composite raw water comprised of Wells SW-195, CM7-190, and CM4-275; (Data from Nov. 2009 -

Dec. 2013)

150% of Raw Water

SLIDE 8

CarolloPaperTemplateWithLogo.pptx/

Product Water Quality Goals Are Consistent With Local Agricultural Requirements.

Ideal Product Water Based on Agricultural Requirements

Parameter Units Criteria

Chloride mg/L < 50 Sodium mg/L < 50 Sulfate mg/L < 150 Bicarbonate mg/L < 150 Boron mg/L < 0.8 TDS mg/L < 600 pH mg/L > 6.5 and < 7.0

SLIDE 9

CarolloPaperTemplateWithLogo.pptx/

Desalting Technologies Be Categorized Into Three Types Of Processes

Reverse Osmosis (RO) Nanofiltration (NF)

Physical Membrane Process

Electrodialysis Reversal (EDR)

Electrically Driven Membrane Process Distillation Thermal Process

Not Practical for Brackish Groundwater Not Competitive with RO Above 4,000 mg/L TDS RO is proposed as the most appropriate treatment process for the South Oxnard Plain desalter facility.

SLIDE 10

CarolloPaperTemplateWithLogo.pptx/

The RO Treatment Process Can Be Grouped Into Three Major Elements.

RO Pre-treatment RO Post-treatment RO System

SLIDE 11

CarolloPaperTemplateWithLogo.pptx/

Site Layout For 20,000 AFY Facility Sand Separators, Cartridge Filters, and RO Trains for 20,000 AFY Facility

SLIDE 12

CarolloPaperTemplateWithLogo.pptx/

AWPF

Proposed Desalter and Well Locations

SLIDE 13

CarolloPaperTemplateWithLogo.pptx/

Proposed Desalter and Well Locations

AWPF

SLIDE 14

CarolloPaperTemplateWithLogo.pptx/

Ocean Sea Water Fresh Water Sea Level Piezometric Surface Ocean Sea Water Fresh Water Groundwater Pumping

SLIDE 15

CarolloPaperTemplateWithLogo.pptx/

Ocean Fresh Water Groundwater Pumping Reduced Brackish Groundwater Pumping

BWTP

Treated Water

Sea Water

Ocean

Sea Water

Fresh Water Groundwater Pumping Brackish Groundwater Pumping

Sea Water

SLIDE 16

CarolloPaperTemplateWithLogo.pptx/

AWPF

Conceptual Groundwater Flow Paths

SLIDE 17

CarolloPaperTemplateWithLogo.pptx/

Unit Water Cost Consistent With Other Projects With Similar Conditions

Desalter Plant Design Capacity, AFY

10,000 20,000

Capital Costs, $ $85,137,000 $147,966,000 Operating Costs, $ /AF $653-$821 $601-$733 Annual O&M with Capital Recovery, $/AF $1,111-$1,278 $998-$1,130

Add ~$100/AF for potable water quality

SLIDE 18

CarolloPaperTemplateWithLogo.pptx/

Brackish Groundwater Plant on the South Oxnard Plain is Technically Feasible

 Is there raw water available? Yes  Is a desalter technically feasible? Yes  Is there a viable waste brine disposal option? Yes  Are there customers for the treated water? Yes  Is the treated water cost a viable option for long-term water supplies? Yes

SLIDE 19

CarolloPaperTemplateWithLogo.pptx/

Pros

Water Supply

Reliable new water

source

Sustainable source

Water Quality

Aquifer rehabilitation
Extraction barrier
AG or potable WQ

GW Management

In lieu recharge
Direct recharge

Flexible operations

Cons

May induce sea

water towards well field (long term)

Future blending may

be required (keep TDS in specific range)

May impact WL &

WQ for some UAS wells near well field

SLIDE 20

CarolloPaperTemplateWithLogo.pptx/

Next Steps?

 Additional water quality analyses in potential area of wellfield (complete)  Grant research (in progress)  Stakeholder outreach (in progress)

AG or Potable water quality
Real estate for treatment plant and wellfield
Exploratory test holes with water quality sampling

and analyses

SCE Load Study
CEQA

Solar ?

SLIDE 21

CarolloPaperTemplateWithLogo.pptx/

SLIDE 22

CarolloPaperTemplateWithLogo.pptx/

SLIDE 23

CarolloPaperTemplateWithLogo.pptx/

PTP-PV

Interconnections

PTP-CAMROSA

Conejo Ck Interconnection

PTP-BWTP

Interconnection

SLIDE 24

CarolloPaperTemplateWithLogo.pptx/

SLIDE 25

CarolloPaperTemplateWithLogo.pptx/

PTP-BWTP-AWPF

Interconnection

SLIDE 26

CarolloPaperTemplateWithLogo.pptx/

Aquifer Recharge – periods of low irrigation demand PTP-PV Delivery PTP-PV Pump Station

SLIDE 27

CarolloPaperTemplateWithLogo.pptx/

“Everything we know is only some kind of approximation, because we know that we do not know all the laws as yet. Therefore, things must be learned only to be unlearned again or, more likely, to be corrected."

Discussion Topics

Brackish Water Extraction & Treatment Project Conceptual (diagrammatic – not to scale)

Brackish Water Extraction Well Field PV PTP  Extraction well field is source of water & barrier to further SWI  Disposal of brine in SMP  Brackish GW treatment for agric use is simpler than for potable use  Flexible operation

Lower part of UAS (~ Mugu aquifer)

The “Rule”: Raw Water Quality and Finished Water Goals Determine the Process

Raw Water Quality Finished Water Goals

Treatment Process

Raw Water Quality Data For Three Existing Wells Are Representative Of The Proposed Desalter Well Field Quality.

Raw Water Quality

Chloride (mg/L Cl-) 3,228 4,843 Sodium (mg/L Na+) 1,077 1,615 Sulfate (mg/L SO4

812 1,218 Bicarbonate (mg/L

246 369 Boron (mg/L B) 0.415 0.622 TDS (mg/L) 6,426 9,639 pH 7.14 7.14

150% of Raw Water

Product Water Quality Goals Are Consistent With Local Agricultural Requirements.

Ideal Product Water Based on Agricultural Requirements

Parameter Units Criteria

Chloride mg/L < 50 Sodium mg/L < 50 Sulfate mg/L < 150 Bicarbonate mg/L < 150 Boron mg/L < 0.8 TDS mg/L < 600 pH mg/L > 6.5 and < 7.0

Desalting Technologies Be Categorized Into Three Types Of Processes

Physical Membrane Process

Electrically Driven Membrane Process Distillation Thermal Process

Not Practical for Brackish Groundwater Not Competitive with RO Above 4,000 mg/L TDS RO is proposed as the most appropriate treatment process for the South Oxnard Plain desalter facility.

The RO Treatment Process Can Be Grouped Into Three Major Elements.

RO Pre-treatment RO Post-treatment RO System

Site Layout For 20,000 AFY Facility Sand Separators, Cartridge Filters, and RO Trains for 20,000 AFY Facility

AWPF

Proposed Desalter and Well Locations

Proposed Desalter and Well Locations

AWPF

Ocean Sea Water Fresh Water Sea Level Piezometric Surface Ocean Sea Water Fresh Water Groundwater Pumping

Ocean Fresh Water Groundwater Pumping Reduced Brackish Groundwater Pumping

Treated Water

Ocean

Fresh Water Groundwater Pumping Brackish Groundwater Pumping

AWPF

Conceptual Groundwater Flow Paths

Unit Water Cost Consistent With Other Projects With Similar Conditions

Desalter Plant Design Capacity, AFY

10,000 20,000

Capital Costs, $ $85,137,000 $147,966,000 Operating Costs, $ /AF $653-$821 $601-$733 Annual O&M with Capital Recovery, $/AF $1,111-$1,278 $998-$1,130

Add ~$100/AF for potable water quality

Brackish Groundwater Plant on the South Oxnard Plain is Technically Feasible

 Is there raw water available? Yes  Is a desalter technically feasible? Yes  Is there a viable waste brine disposal option? Yes  Are there customers for the treated water? Yes  Is the treated water cost a viable option for long-term water supplies? Yes

Pros

Water Supply

source

Water Quality

GW Management

Flexible operations

Cons

water towards well field (long term)

be required (keep TDS in specific range)

WQ for some UAS wells near well field

Next Steps?

 Additional water quality analyses in potential area of wellfield (complete)  Grant research (in progress)  Stakeholder outreach (in progress)

and analyses

Solar ?

PTP-PV

Interconnections

PTP-CAMROSA

Conejo Ck Interconnection

PTP-BWTP

Interconnection

PTP-BWTP-AWPF

Interconnection

Aquifer Recharge – periods of low irrigation demand PTP-PV Delivery PTP-PV Pump Station

“Everything we know is only some kind of approximation, because we know that we do not know all the laws as yet. Therefore, things must be learned only to be unlearned again or, more likely, to be corrected."

[Richard Feynman, Nobel Prize Winning Physicist]

Questions ?