Groundwater Reliability Improvement Program Conveyance Pipeline Alternative Alignment Analysis

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WaterSilos

The Ultimate Storage Solution

www.waterSilos.info

Existing Stormwater Infrastructure

Storm drain conveys pollutedstormwater runoff to receivingwaters and the ocean!

•Violates NPDES permit

•Looses precious water

•Is unsustainable

•Leaves millions of acres ofspace below public ROWidle

StormDrain

Idle

Public ROW

Proposed Stormwater Infrastructure

WaterSilos capture and storestormwater runoff for treatmentand reuse

•Meets NPDES permit

•Stores and reuses precious water

•Is a smart sustainability move

•Makes best use of the idle spacebelow public ROW

StormDrain

Separator

WaterSilo

Diversion

Valve

Pipe

What is a WaterSilo?

A vertical hollow shaft constructedunderground using proven augurdrilling technology

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•Proven constructiontechnology

•Does not require land

•Small footprint

•Rapid construction

•Diameters up to 30 ft anddepths up to 200 ft

•Storage units of 10,000 to200,000 gallons

•Unlimited system storagecapacity

WaterSilo System Components

Diversion Manhole

Diverts the stormwaterrunoff at a design flow

Hydrodynamic Separator

Screens out the debris and suspendedparticles from the diverted stormwater

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WaterSilos System Components

Submersible Pump

Pumps the stored water out fortreatment and reuse

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Connection Pipe

Connects consecutive WaterSilosto integrate the storage system

WaterSilos System Components

Roadside/Median Bioswale

Receives the stored water and treats itfor reuse

Roadside/MedianInfiltration Trench

Receives the stored water andinfiltrates it for groundwater recharge

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WaterSilos System Sizing

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1.Calculate the total volume of storagerequired

2.Identify range of feasible WaterSilodiameters and depths per local constraints

3.Calculate water storage attainable perWaterSilo

4.Determine number of WaterSilos needed

5.Calculate available fill time and designdiversion flow rate

6.Determine number of WaterSilos perdiversion

7.Perform hydraulic calculations to size thediversion pipes, hydrodynamic separator,and WaterSilo connection pipe

WaterSilos System Costs – Silos

WaterSilos System Costs* – Total

* 1.0 million Gallon Hypothetical WaterSilo Storage System comprised of twenty12-ft diameter 60-ft deep WaterSilos with Grouted CMP Liners, three diversionstructures and hydrodynamic separators, and one submersible pump

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WaterSilos is a patent-pending Intellectual Property (IP)of SEITec corporation. It's use requires explicit writtenauthorization and payment of a royalty fee

Owners: Written authorization permits an owner to advertise aWaterSilos project for open bid or to commission the constructionof a WaterSilos project. Design-Build Contractors: Written authorization permits adesign-build contractor to propose, design, and build the systemfor utilities and owners that do not have WaterSilos authorization.Retail: Written authorization serves as permission for retailenterprise owners and managers to offer the WaterSilos systemfor sale through their distribution outlets, in exchange for anagreed upon compensation.

Third Parties: Written authorization permits third parties topromote and market WaterSilos to potential customers inexchange for an agreed upon compensation.

WaterSilos System

•Simple

•Does not requires land

•Relatively minimal planning

•Minor construction

•Small footprint

•Gravity diversion

•Minimum stakeholderoutreach and permitting

•Significantly lower cost

•Widespread practicalapplication

•Short lead time

Q&A