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Presentation outline

• Project approach/philosophy• Supplies and demands• Regulations• Technologies• Draft planning projects• Ranking criteria for projects

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Compliance andSelf-Reliance

Project Goalsuc

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Project Work Flow

• UCSC Supplies/ Demands

• Other Campuses• Regulations• Background

Reports• Summit Meeting

Data Collection

Analysis Workshop Reuse Report

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BMP's

Ordinances

No

Nearby Supply

Yes

Regulations/Technology

Near Term (1-5 years)

Immediate (0-1 year)

Long Term (>5 years)

LID

General Potable Water Offsets

Yes

Screening

Offset Projects

Trigger-Based Approach

Potable Water Offset Project

Identify Demand

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Workshop Framework

• Supplies and demands are based on UCSC input and reports

• All projects discussed are technically feasible• All projects comply with regulations• Key projects focus on large options• Input from all attendees!

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Overall Campus Water Use

From 2006 Water Efficiency Survey

X

XX

X

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BMP's

Ordinances

Yes

Regulations/Technology

Near Term (1-5 years)

Immediate (0-1 year)

Long Term (>5 years)

LID

General Potable Water Offsets

Yes

Screening

Offset Projects

Trigger-Based Approach

Potable Water Offset Project

No

Nearby Supply

Identify Demand

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Identified Nonpotable Supplies and Demands

• Supplies– Recycled Water– Well Water– Greywater– Rainwater

• Demands– Irrigation– Toilet Flushing– Urinal Flushing– Cooling Tower Makeup

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Supply – Recycled Water

157 MG/YCampus Total

Volume

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1Supplies - Well Water

6.5 MG/YW2

50 MG/YW1

Volumes

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3-6 MG/YGW3

3.0 MG/YGW2

5.5 MG/YGW1

Volumes

Supply Volumes - Greywater

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3Supply Volumes - Rainwater

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Supply Volumes - Rainwater

0.8 MG/YPorter CollegeR6

0.6 MG/YCowell CollegeR7

0.14 MG/YBiomedical FacilityR5

0.6 MG/YCore West Parking StructureR4

1.2 MG/YWest Remote Parking LotR3

5.7 MG/YJordan Gulch Middle ForkR2

5.4 MG/YEast Remote Parking LotR1

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5Demands – Irrigation

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Demand Volumes – Irrigation

0.11 MG/YOakes DormsI 10

0.7 MG/YCollege 8 I 9

0.9 MG/YFamily Housing Playing FieldI 8

1.0 MG/YMerrill Garden ProjectI 7

1.1 MG/YWest FieldI 6

1.2 MG/YFaculty HousingI 5

2.9 MG/YFarm projectI 4

5.4 MG/YArboretum (IR 01+IR 05)I 3

6.2 MG/YEFH Sand FieldI 2

9.4 MG/YEFH Athletic FieldI 1

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7Demands – Toilet Flushing

2-3 MG/YT3

1-2 MG/YT4

1.4 MG/YT2

3.5 MG/YT1

Volumes

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1-2 MG/YC2

4.8 MG/YC1

Volumes

Demands – Cooling Tower

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9Matching Supplies and Demands

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Matching Supplies and Demands

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1Trigger-Based Approach

BMP's

Ordinances

Yes

Near Term (1-5 years)

Immediate (0-1 year)

Long Term (>5 years)

LID

General Potable Water Offsets

Yes

Screening

Offset Projects

Potable Water Offset Project

Regulations/Technology

No

Nearby Supply

Identify Demand

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Regulations – What’s Allowed

Recycled

??Grey

Rain

Cooling ToiletsIrrigation

Demands

Sup

plie

s

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Recycled

Grey

Rain

Cooling ToiletsIrrigation

DemandsS

uppl

ies

Regulations – What’s Required

Title 22Title 22Title 22

Title 22 (Filt./Dis.)

Title 22 (Filt./Dis.)

Title 24 Subsurface with filtration

Filt./Dis. Suggested

Filt./Dis. Suggested-

Title 22 = Highly regulated, highly treated

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Technologies

MBRUV

MBRUV

MBRUVRecycled

Membranesand UVFiltrationGrey

Cloth Filtration and Hypochlorite?Rain

Cooling ToiletsIrrigation

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Rainwater ReuseTechnologies

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Collected Rainwater and Runoff is NOT Pathogen Free

UCSCOceanside

?33 - 1,200 MPN/100mLEnterococci

?130 - 22 MPN/100mLFecal Coliform

?2,000 - >16,000 MPN/100mLTotal Coliform

• Sampling will determine treatment level

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7Filtration and UV Disinfection Implemented for Oceanside

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GreywaterReuse Technologies

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9Greywater Requires Similar or Greater Treatment than Surface Water/Rain Water

UCSCWERF Literature

?6,000 - 8,000,000MPN/100mLFecal Coliform

?6,000 - 80,000,000 MPN/100mLTotal Coliform

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Greywater Treatment: Combined Filtration/Disinfection Technologies

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Recycled WaterReuse Technologies

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Recycled Water – Highest Treatment Costs Results in Most Use Flexibility

SBR

1 MGD MBR:Cost = $1.68 million

Size = 30' L x 58' W x 14'8" H

MBR

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Draft PlanningProjects

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Regulations/Technology

Trigger-Based Approach

Yes

Near Term (1-5 years)

Immediate (0-1 year)

Long Term (>5 years)

LID

General Potable Water Offsets

Yes

Screening

BMP's

Ordinances

Offset Projects

Potable Water Offset Project

No

Nearby Supply

Identify Demand

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5Immediate Projects

• BMPs

• Ordinances

• Example Project: Well Water for Irrigation

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Best Management Practices

• Implement Conservation Practices

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7Ordinances

• Work within the campus to identify and address institutional barriers to using non-potable water

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Example Offset Immediate Project - Well Water for Irrigation

• Up to 50 MG/Y supply– Not seasonal – More study necessary

• 3.1 MG/Y demand at farm• No storage • No treatment

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9Trigger-Based Approach

Yes

Near Term (1-5 years)

Immediate (0-1 year)

Long Term (>5 years)

LID

General Potable Water Offsets

YesBMP's

Ordinances

Offset ProjectsScreening

Potable Water Offset Project

Regulations/Technology

No

Nearby Supply

Identify Demand

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Near-term Projects

East FieldEast Remote Parking Lot Cowell

CollegeCowell College

Biomedical Sciences Building

Biomedical Sciences Building Existing Cooling

TowersJordan Gulch Middle Fork

ArboretumFamily

Housing CowellCollege

Cowell College

1 2

34

56

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1Near-Term Project 1

East Remote Parking Lower East Field

0

0.5

1.0

1.5

2.0

2.5

Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sept Oct

MG

/Y

Field Demand GallonsRain Supply

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• 10 MG/year total irrigation demand• 5.4 MG/year total rain supply• 4.6 MG/year needs to be made up with other source• 4 MG/year storage necessary

Near-Term Project 1

Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sept Oct

To storage From storage

Other source

0

0.5

1.0

1.5

2.0

2.5

MG

/Y

Field Demand GallonsRain Supply

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3Near-Term Project 1 -Implementation Issues

• Treatment – Screening and separation• Maintenance – Yearly cleaning• Infrastructure – pump station and pipeline,

storage tank(s)

1 MG 1 MG 1 MG 1 MG

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Near-Term Project 2Cowell College Cowell College

0

.2

.4

.6

.8

1.2

1.2

1.4

1.6

1.8

2.0

Sept Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug

Toilet DemandRain Supply

MG

/Y

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• 1.4 MG/year total toilet flushing demand• 0.6 MG/year total rain supply• 0.8 MG/year needs to be made up with other source• Minimal storage necessary

Near-Term Project 2

0

.2

.4

.6

.8

1.2

1.2

1.4

1.6

1.8

2.0

Sept Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug

Toilet DemandRain Supply

MG

/Y

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Near-Term Project 2 -Implementation Issues

• Treatment – screening and disinfection

• Maintenance – Yearly cleaning of storage

• Infrastructure – pump and pipeline, storage tank

Photo from Construction Innovation Forum www.cif.org

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7Mills College Example

Source: Susan Ecker of Rumsey Engineers

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Trigger-Based Approach

Regulations/Technology

Yes

Near Term (1-5 years)

Immediate (0-1 year)

Long Term (>5 years)

LID

General Potable Water

Offsets

Yes

Screening

BMP's

Ordinances

Offset Projects

Potable Water Offset Project

No

Nearby Supply

Identify Demand

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9Long-Term Projects

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Long-Term Projects Guiding Principles

• Near-term projects not implemented in 5 year time frame

• Master planned projects incorporating LID – LEED Platinum for new construction– LEED Silver for renovated construction

• Master planned projects incorporating potable water offsets

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1Trigger-Based Approach

Yes

Near Term (1-5 years)

Immediate (0-1 year)

Long Term (>5 years)

LID

General Potable Water Offsets

YesBMP's

Ordinances

Offset ProjectsScreening

Potable Water Offset Project

Regulations/Technology

No

Nearby Supply

Identify Demand

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All 2, 3

1

4, 5, 6

Overall Project Feasibility

4, 5, 6

Long-TermNear-TermImmediate

Obvious

Maybe

ProbablyNot

All

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3Screening Criteria

• Ease of Operation– Number of operators– Level of training

• Sustainability– Energy use– Environmental impact

• Cost/gallon– Capital cost

• Campus Community Buy-in– Campus perception of projects

• Offset Value– Amount of water that can be offset– Time of year of availability

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Pairwise Screening Comparison

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Questions?

Deepti Chatti, LEED AP

Dchatti@carollo.com

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Backup Slides

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7Other Campus’ Efforts

• Stanford– LEED platinum on CIE

• Merced• Mills

– Rainwater Schematic

• UC System– LEED silver

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Pasteurization Is Promising

Filtration not needed ahead of disinfection

Indigenous Total Coliform Disinfection for PTG Pilot

00.5

11.5

22.5

33.5

44.5

140 145 150 155 160 165 170

Temperature, degrees F

Log

Red

uctio

n