2024 Recycled Water Master Plan Update
Study Issue ESD 22-01
Environmental Services Department
September 24, 2024
2Recycled Water Master Plan Update
Background
2024 RWMP Update
Recommendations
Q&A
Agenda
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Policy EM-1.2
Maximize recycled water use for all approved purposes
both within and in areas adjacent to the City, where feasible.
Sunnyvale Recycled Water Policy
Recycled Water Pump Station (RWPS)
San Lucar Pump Station (SLPS)
Moffett Park Specific Plan Area
New public and private streets are required to provide
recycled water infrastructure, and new developments will be required to tie into the recycled water system.
4Recycled Water Master Plan Update
• Sustainable water source
• Reduces nutrients to the South Bay
• Desirable for customers pursuing green options
• Promotes regional water resiliency
• Expanding/Improving existing system maximizes
use of existing assets
Recycled Water Benefits
Source: USEPA
5Recycled Water Master Plan Update
Recycled Water in Sunnyvale
2000 2005 2010 2015 2020 2025
Wolfe Road RW
Pipeline Extension
Recycled Water
Master Plan Update
2022
Council approved
Study Issue ESD 22-01
Recycled Water
Permit (#94-069)
2018
2024
Recycled Water
Master Plan
20131994
Continuous RW
Production
2020
6Recycled Water Master Plan Update
Recycled Water System Overview
22 miles of recycled water mains (8” to 36”)
2 Pump Stations
Recycled Water Pump Station (RWPS): 5.4 Million Gallons per Day (MGD)
San Lucar Pump Station (SLPS): 8.2 MGD
1 Storage Tank
San Lucar Storage Tank: 1.5 MG storage capacity
120 customers
Most are located north of Hwy 237 and use recycled water for landscape irrigation
11 active dual-plumbing sites
Recycled water priced at 90% of potable water
Average annual demand: 1.04 MGD
Peak summer day demand: 2.42 MGD
RWPS
SLPS &
Storage Tank
Apple II Campus
(CalWater Customer)
7Recycled Water Master Plan Update
Sunnyvale SMaRT Station
Major Recycled Water Customers
Sunnyvale Muni
Golf Course
Google Campus
Apple Campus
Foothill College
Amazon Campus
Juniper Network Campus
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Historical Recycled Water Production (2014-2023)
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023
WPCP RW Production (AFY) 233 779 743 34 804 371 377 380 123 - WPCP RW Production (MGD) 0.21 0.70 0.66 0.03 0.72 0.33 0.34 0.34 0.11 - -
0.10 0.20
0.30 0.40
0.50 0.60
0.70 0.80
0.90 1.00
-
100
200
300
400
500
600
700
800
900
1,000
1,100
Production
(MGD)Production
(AFY)
Average Annual
Production: 0.34 MGD
9Recycled Water Master Plan Update
Why 2024 RWMP Update?
2020:
Valley Water delayed partnership discussions with Sunnyvale about expanding advanced purified water use until 2028. 2022:
Council approved Study Issue ESD 22-01 to evaluate
opportunities to expand recycled water use in the City.
10Recycled Water Master Plan Update
2024 RWMP Update Overview
System Expansion
Identified four alternatives to expand the recycled water system Total potential new demands: 1,176 AFY (1.05 MGD)
Total estimated capital cost: $140.5M
Challenges
Water Quality (Total Dissolved Solids)
Cost
Opportunities
Grant Funding
Customer Contributions
Utility funding
Regional Partnership
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System Expansion
Alternative 1 – Existing System
Improve existing system with minor dead-end extensions Improve water quality
Alternative 2 – Infill Connections
Pursue 10 potential customers located in the vicinity of the existing system Alternative 3 – Maximize Existing System
Install approx. 8.4 miles of new mains to unlock new demands along Wolfe Rd Alternative 4 – Full Buildout
Install new storage tank and pump station
Upgrade RWPS once new demand exceeds 0.65 MGD
Install approx. 5.9 miles of new mains to unlock new demands in the upper pressure zone 12Recycled Water Master Plan Update
+ RWPS
Upgrade
$11.6M
System Expansion
Alt. 1
Existing System
Alt. 2
Infills
0.08 mgd | $1.8M
Alt. 3
Wolfe Rd Branching
0.48 mgd | $33.6M
Alt. 4 - Phase 1
North of ECR Loop
0.06 mgd | $41.4M
Alt. 4 - Phase 2A
East of Wolfe Rd Branching
0.10 mgd | $4.8M
Alt. 4 - Phase 2B
West of Wolfe Rd Loop
0.16 mgd | $28.7M
Alt. 4 - Phase 3
West of De Anza Blvd
Branching
0.16 mgd| $18.5M
Alt 4
Phase 1
Alt 4
Phase 2A
Alt 4
Phase 3
Alt 4
Phase 2B
Alt. 3
Alt. 1
Alt. 2
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Alternative 1 – Existing System
Improve Existing System
Improve system reliability with minor dead-
end extensions
Install approx. 2.1 miles of recycled water
mains (already in CIP budget)
New Moffett Park Specific Plan customers
Improve Water Quality
Install a new recycled water treatment plant
Reduce TDS to below 500 PPM
Capital Cost of $75 M (Not in CIP Budget)
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Alternative 2 – Infill Connections
Connect low-hanging fruit
Pursue 10 potential customers located near the existing system
Potential New Demands: 0.08 MGD
Estimated Capital Cost: $1.8 M
Major Potential New Customers:
Lockheed Martin Site
Hwy 237 Landscaping Irrigation
San Miguel Elementary School
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Alternative 3 - Maximize Existing System
Expand Network to Reach New Customers
Install approx. 8.4 miles of new mains
Potential New Demands: 0.48 MGD
Estimated Capital Cost: $33.6 M
Major Potential New Customers:
Applied Materials
Lakewood Park and Fairwood Park
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Alternative 4 – Full Buildout
Four Phases. Each phase is a prerequisite to
unlocking more customers in the following phases
Total Potential New Demand: 0.49 MGD
Total Estimated Capital Cost: $105.0 M
o Pipeline Alignments: $79.5 M
o New Storage Tank and PS: $13.9 M
o RWPS Upgrades: $11.6M
(if/when new demand exceeds 0.65 MGD)
Phase 1
Phase 2A
Phase 2BPhase 3
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System Expansion Summary (All 4 Alts.)
Total Potential New Demand: 1.05 MGD
Total Estimated Capital Cost: $140.5 M
o New Pipelines: $115.0 M
o New Storage Tank and Pump Station: $ 13.9M
o RWPS Upgrades: $11.6 M
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City Parks
Baylands Park
Fair Oaks
Park
Parks Course already Connected to RW
Fair Oaks Park (Athletic Field not Connected)
Baylands Park
Encinal Park
Potential New Connections: 15 Parks
Total New Demand: 0.3 MGD
Total Estimated Capital Cost: $104.1 M
Parks with Athletic Fields: Lakewood, Washington, Ortega Total New Demand: 0.084 MGD
Total Estimated Capital Cost: $29.0 M
Encinal
Park
*System Expansion of all 4 Alts already included connections to Parks & Athletic fields. The costs shown are not additional costs. 19Recycled Water Master Plan Update
Potential New Park Connections
Alternative City Parks
New
Demand
(AFY)
New
Demand
(MGD)
Alignment
Cost **
Alt 3 – Lower PZ
Branching
Lakewood*, Seven Seas,
Fair Wood, Murphy 50 0.045 $19,101,000
Alt 4 – Phase 1
Lower PZ Loop Washington* 40 0.036 $41,308,000
Alt 4 – Phase 2A
Upper PZ Branching Raynor, Ponderosa 48 0.043 $4,004,000 Alt 4 – Phase 2B
Upper PZ Loop
Ortega*, Braly, Panama,
Orchard Heritage 120 0.11 $28,663,000
Alt 4 – Phase 3
Expansion Branching
Las Palmas, Serra, San
Antonio, De Anza 73 0.07 $11,066,000
Total: 331 0.30 $104,142,000
Lakewood Park
Ortega Park
Washington
Park
* Large parks with athletic fields
** System Expansion of all 4 Alts already included connections to Parks & Athletic fields.
The costs shown are not additional costs.
20Recycled Water Master Plan Update
City Parks with Athletic Fields
Lakewood Park
Fair Oaks Park
Ortega Park
Washington
Park
Alternative City Parks
New
Demand
(AFY)
New
Demand
(MGD)
Alignment
Cost *
Alt 1
Existing System Fair Oaks Park -- -- --
Alt 3
Lakewood Dr. Lakewood Park 18 0.016 $2,000,000
Alt 4 – Phase 1
Lower PZ Loop Washington Park 40 0.036 $20,000,000
Alt 4 – Phase 2B
Upper PZ Loop Ortega Park 37 0.033 $7,000,000
Total: 95 0.084 $29,000,000
* System Expansion of all 4 Alts already included connections to Parks & Athletic fields. The costs shown are not additional costs.
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Opportunities and Challenges
Opportunities
New Customers
Customer Contributions
Grant Funding
Regional Partnership
Challenges
Cost
Water Quality (mainly TDS)
Regulatory Requirements
22Recycled Water Master Plan Update
Water Quality
• Total Dissolved solids (TDS) runs on average 1,200 parts per million (ppm)
• Water from SFPUC runs between 65-95 ppm
• Current TDS levels are detrimental to internal metallic plumbing fixtures and pipes.
• Retrofitting cooling towers with RW at current quality will require additional treatment and higher water
consumption
• Athletic Fields will also need higher quality RW
• Estimated advanced treatment cost: $75M
Current Challenges to Expanding Recycled Water Use
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• Alternative 1: Blending with potable water (existing) • Alternative 2: Microfiltration
• Alternative 3: Microfiltration with Reverse Osmosis
• Alternative 4: Membrane Bio-Reactor (with or without Reverse Osmosis) Treatment Alternatives (from Clean Water Master Plan Update) Microfiltration & RO System
at the South Bay Water
Recycling (SBWR) Facility
Membrane Bio-Reactor
System
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Palo Alto
Technical Assistance
2019 Agreement
Sunnyvale
Potable Reuse
Sunnyvale RWMP
Feasibility Study
Wolfe Road Pipeline
Long term Agreement
District Wholesaler
SBWR
Potable Reuse Feasibility Study
40-yr Integration Agreement
SVAWPC Operations Agreement
District partner role (SVAWPC)
SBWR Master Plan
SCRWA
Agreement
Wholesaler
South County RWMP
Continue to Pursue Regional Partnerships
District
Recycled Water
Master Plan
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• Implement Alt. 1 ($75 M) and Alt. 2 ($1.8 M)
• Explore opportunities to update policies to require RW use for new customers and provide financial incentives to attract new customers • Initiate design for Alt. 3 and Phase 2A of Alternative 4, and seek grant funding/ Customer Contributions & CIP for implementation Recommendations
Alt. 1
Existing System
Alt. 2
Infills
0.08 mgd | $1.8M
Alt. 3
Wolfe Rd Branching
0.48 mgd | $33.6M
Alt. 4 Phase 1
North of ECR Loop
0.06 mgd| $41.4M
Phase 2A
East of Wolfe Rd
Branching
0.10 mgd| $4.8M
Phase 2B
West of Wolfe Rd
Loop
0.16 mgd | $28.7M
Phase 3
West of De Anza
Blvd Branching
0.16 mgd| $18.5M
+ RWPS
Upgrade
$11.6M
26Recycled Water Master Plan Update
Questions
Discussion and Feedback