HomeMy WebLinkAbout06.a. Recycled Water Policy DiscussionItem 6.a.
J uly 20, 2021
T O: R E A L E S TAT E, E NV I R O NME NTA L A ND P L A NNI NG C O MMI T T E E
F RO M :ME L O D Y L A B E L L A , R E S O UR C E R E C O V E RY P R O G R A M MA NA G E R
RE V IE WE D B Y:J E A N-MA R C P E T I T, D I R E C TO R O F E NG I NE E R I NG A ND T E C HNI C A L
S E RV I C E S
R O G E R S. B A I L E Y, G E NE R A L MA NA G E R
S UB J E C T: R E C YC L E D WAT E R P O L I C Y D I S C US S I O N
I n response to a request from the Real Estate, E nvironmental & Planning C ommittee (R E E P) Committee,
staf f has prepared the attached presentation, which will be brought to the f ull Board on August 5, 2021.
T he purpose of the presentation is to provide background to assist the Board in determining its direction to
staf f on how to proceed with the development of f uture recycled water projects that use Central S an's
wastewater supply.
Staf f looks forward to reviewing this presentation and receiving the C ommittee's input at this meeting.
Strategic Plan Tie-I n
G O A L TW O: Environmental Stewardship
Strategy 3 – Support regional development of local water supply
AT TAC HM E NT S :
D escription
1. P resentation
July 20, 2021 Special REEP Committee Meeting Agenda Packet - Page 36 of 71
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CENTRAL SAN RECYCLED WATER
POLICY DISCUSSION
Melody LaBella, P.E.
Resource Recovery Program Manager
Real Estate, Environmental & Planning (REEP)
Committee Meeting
July 20, 2021
PRESENTATION OUTLINE
1.Overview of Central San’s Recycled Water Initiatives
2.Review of Central San’s Water Recycling Efforts
3.Central San’s Board Recycled Water Initiatives
4.Constraints Associated with Recycled Water
5.Summary of Current Commitments
6.Policy Questions
7.Questions/Discussion/Direction
2
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1. OVERVIEW OF CENTRAL SAN’S
RECYCLED WATER INITIATIVES
3
Filter Plant
&
Clearwell
Plant
Utility
Water
Zone 1
Recycled
Water
Temporary
Diversion by
DERWA
Diversion by Golf
Courses:
•Diablo Country Club
•Moraga Country Club
Martinez
Refineries
Suisun Bay Discharge
Treatment
Plant
RO ConcentrateAdvanced
Treatment
Facilities
Concord
Reuse
Project
Refinery Recycled
Water Exchange
Project
(Santa Clara
Valley Water
District)
CURRENT CENTRAL SAN RECYCLED WATER INITIATIVES
4
Contra Costa
Water District
(CCWD)
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2. REVIEW OF CENTRAL SAN’S WATER
RECYCLING EFFORTS
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ORIGINAL REFINERY PROJECT FACILITIES
•Forebays and Applied Water Pumps
•Filter Plant
•Clearwell
•Conveyance Facilities
•Distribution Storage Tanks
Status: Project was constructed, but never moved
forward.
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•Central San owns and operates a
recycled water distribution system
called “Zone 1.”
•In 2020, Central San sold ~217
million gallons of recycled water.
•Central San’s Wastewater
Treatment Plant uses about 1
million gallons per day (MGD) of
recycled water.
CENTRAL SAN’S ZONE 1
RECYCLED WATER PROGRAM
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ZONE 1 RECYCLED WATER DISTRIBUTION SYSTEM
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July 20, 2021 Special REEP Committee Meeting Agenda Packet - Page 40 of 71
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ZONE 1 PIPELINE CUSTOMERS
•Contra Costa Country Club Golf Course
•Buchanan Fields Golf Course
•Diablo Valley College
•Mt. Diablo Unified School District
•Pleasant Hill Recreation and Park
District
•Contra Costa County
•Business in the Diamond Blvd. area
of Concord
•Coco San Sustainable Farm
9
COMMERCIAL TRUCK FILL PROGRAM
•Provides recycled water to licensed contractors
for construction activities such as dust control,
soil compaction, and plant establishment.
•Contractors can access recycled water via
purple fire hydrants or from Central San’s
Commercial Fill Station.
•Recycled water provided through this program
is free of charge.
One of Central San's three hydrants (left) and a portable meter (middle) that contractors can
use to obtain Central San’s recycled water. Central San’s Fill Station (right).
10
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RESIDENTIAL FILL STATION
The Residential Fill Station Program allows
central Contra Costa County residents to
pick up recycled water free of charge at
our Household Hazardous Waste (HHW)
facility in Martinez for hand-watering
lawns, landscaping, and gardens.
How to use this program:
•Complete an Application/Use
Agreement and a brief training class on
the proper use of recycled water
•Brings containers with watertight lids; 1
gallon minimum to 300 gallon maximum
•Use appropriately‐sized containers and
vehicles for transport (water is heavy!)
•Unlimited trips allowed
11
CURRENT INVESTMENT IN RECYCLED WATER FACILITY
IMPROVEMENTS -PHASE 1A - $35.8 MILLION (M)
•Replace Backwash Motors
(480V)
•Recycled Water Storage:
o Replace East Clearwell
with two new above
ground storage tanks
(steel or pre-stressed
concrete)
•Clearwell Overflow
Structure Modifications
•Rehabilitation one Filter
(# 3) and Mechanical/
Instrumentations on others
•Upgrade Chemical Feed
•Applied Water Pump
Station (AWPS)
Upgrade/Replace Electrical Gear
•New Recycled Pump Station
Electrical Facility
•Replace Substation 40 - 2400V
•Replace Variable Frequency
Drives for AWPS
West
CW
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DUBLIN SAN RAMON SERVICES DISTRICT –EAST BAY
MUNICIPAL UTILITY DISTRICT RECYCLED WATER
AUTHORITY (DERWA) DIVERSION
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GUIDING PRINCIPLES FOR CENTRAL SAN’S
AGREEMENT WITH DERWA
1.No Adverse Financial Impact to Central San
2.No Adverse Financial Impact to Concord and Clayton
3.Consistency with Existing Bond Covenants
4.Consistency with Proposition 218
5.Community Acceptance
6.Temporary Nature
7.Mitigation of Technical and Operational Impacts
8.Benefits to Central San Customers
9.Facilitate a Sustainable Solution to the Region’s Water
Supply Shortage
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3. CENTRAL SAN’S BOARD
RECYCLED WATER INITIATIVES
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CONCORD NAVAL WEAPONS STATION REDEVELOPMENT
2.1 MGD BY 2035 TO 6.3 MGD AT BUILDOUT 2040+
• Will serve letter to
provide recycled water
to the new development
• Development to be
located both within City
of Concord and Central
San services areas
• Central San to produce
the recycled water and
wholesale it to CCWD
• CCWD responsible for
sale and distribution of
recycled water Project Status: On Hold
pending selection of a new
master developer by City
of Concord
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July 20, 2021 Special REEP Committee Meeting Agenda Packet - Page 44 of 71
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RECYCLED WATER WHOLESALE OPPORTUNITIES STUDY
•The study’s objective was to understand
the water market and demand for Central
San’s potential supply of recycled water.
•In 2015, the REEP Committee provided the
following guidance on the study:
•Favor projects with year-round recycled
water demand.
•Favor a small number of large projects
over many small projects.
•The following slides are excerpts from a
presentation provided to the Board in
February 2016.
RMC Water and Environment (now Woodard
and Curran) was hired by Central San to
complete the study.
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Overview Map of Potential Opportunities
LEGEND
CCCSD WWTP
EBMUD Aqueduct
CCWD Canal
DSRSD Facilities
CVP/SWP
Facilities
Los Vaqueros
Reservoir
San Pablo
Reservoir
Briones
Reservoir
Upper San Leandro
Reservoir
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Market Assessment
Recycled Water (ReW) Indirect Potable (IPR) Direct Potable (DPR)
•CCWD Canal
•Local Golf Courses
•Local refineries
•Export to Ag –
Delta Mendota
Canal (DMC)
•Export to DERWA
•Export to Delta
Diablo
•EBMUD Mokelumne
Aqueduct #1 or #2
•EBMUD San Pablo
Reservoir
•EBMUD Briones Res.
•EBMUD Upper San
Leandro Res
•Lafayette Reservoir
•Los Vaqueros Reservoir
•CCWD Clayton
groundwater recharge
•DSRSD groundwater
recharge
•EBMUD Mokelumne
Aqueduct #1, 2, or 3
•CCWD Mallard Reservoir
Bollman WTP
Wastewater
•Send San Ramon
Pump Station to
DSRSD
Alternatives
to be
investigated
Further
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Alt #1 – Recycled Water to Refineries
Suisun Bay
Martinez
Concord
Benicia
1 mile
•Utilizes existing infrastructure
•20 mgd demand
Shell Refinery Tesoro Refinery
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Alt #2 – Recycled Water to DMC
•Approximately 40 miles to
CVP pump facility
•Could potentially utilize all
CCCSD’s effluent
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Alt #3 – Augment Regional Water Supplies
•Bay Area Regional
Reliability Partners (BARR)
CCWD
EBMUD
San Francisco PUC
Alameda Co. WD
Santa Clara Valley WD
Zone 7
Marin Municipal WD
Bay Area Water Suppliers
& Conservation Agencies
(BAWSCA)
•DSRSD
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Recommended Next Steps from Wholesale Opportunities Study
•Initiate Discussions to Continue Evaluation
Refinery RW exchange with CCWD for raw water
IPR/DPR augmentation through EBMUD
San Luis Delta Mendota Water Authority & Reclamation (Agriculture)
Regional Reliability Partners
•IPR/DPR as a local reliable supply alternative
CCWD
•Would serve as a critical partner in all alternatives through exchanges
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Transfer‐Bethany
Pipeline
(proposed)
REFINERY RECYCLED WATER
EXCHANGE PROJECT CONCEPT
Martinez
Refineries
Contra Costa
Water District
(CCWD)
South Bay
Aqueduct
Los Vaqueros
Reservoir
(Santa Clara
Valley Water
District)
24
July 20, 2021 Special REEP Committee Meeting Agenda Packet - Page 48 of 71
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MEMORANDUM OF UNDERSTANDING (MOU)
•On April 30, 2018, a three-way MOU was executed
between Central San, CCWD, and Valley Water to conduct
a Preliminary Feasibility Evaluation of the Refinery
Recycled Water Exchange Project.
•On July 3, 2019, Amendment 1 was executed, extending
the termination date to June 30, 2020.
•On June 22, 2020, Amendment 2 was executed, extending
the termination date to June 30, 2021.
•The three partner agencies are currently working to extend
the termination date to June 30, 2022.
25
WORK PLAN DEVELOPED
JUNE 2018
•Central San, CCWD, and Valley Water staff collaborated to
develop a Work Plan called for in the MOU
•Tasks included:
A.Review and update costs Central San previously developed to
provide recycled water for refinery use
B.Review refinery water quality requirements
C.Evaluate/estimate the project’s yield
D.Develop updated cost estimates
E.Allocate costs, based on beneficiary pays
F.Final report
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WATER EXCHANGE PROJECT –NEXT STEPS
•Extend the termination date of the current MOU to June 30, 2022
•Presentation to Valley Water’s Recycled Water Committee on
July 28, 2021
•Finalize the cost allocation
•Complete the Preliminary Feasibility Evaluation Report
•Meet with the US Bureau of Reclamation?
•Determine if the project will proceed to a more-detailed
Feasibility-level Evaluation
SATELLITE WATER RECYCLING FACILITIES (SWRFS)
•Diablo Country Club (DCC)
•MOUs executed in 2012 and 2015
•Requesting Demonstration Project
•Moraga Country Club
•MOU executed in 2016
•Rossmoor
•Recent request for an MOU
•Others? (~Ten other golf courses
in Central San’s service area)
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4. CONSTRAINTS ASSOCIATED WITH
RECYCLED WATER
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CONSTRAINTS ASSOCIATED WITH RECYCLED WATER
A.Water Service Duplication Laws
B.Cost and Cost Recovery
C.Preference for Large Recycled Water Users
D.Seasonal vs. Year-round Recycled Water Demand
E.Finite Volume of Wastewater in Dry Months
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A. WATER SERVICE
DUPLICATION LAWS
The water agencies within
Central San’s Service Area have
purveying rights over the
distribution of water:
• East Bay Municipal Utility
District (EBMUD)
• Contra Costa Water District
(CCWD)
• City of Martinez
• Dublin San Ramon Services
District (DSRSD)
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EXAMPLE WITH EBMUD – LAMORINDA PROJECT
In 1994, Central San purchased an abandoned
Shell fuel pipeline to distribute recycled water to the
Lamorinda area for landscape irrigation.
Status: Project halted by EBMUD due to opposition
during the public environmental review process.
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EXAMPLE WITH CCWD – ZONE 1
•1996 Agreement with CCWD
•14 miles of purple pipelines
•~50 metered customer connections
•Primarily landscape irrigation
•Truck Fill Program
•Residential Fill Station
Status: Central San owns and operates Zone 1
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B. COST AND COST RECOVERY
•Production and distribution of recycled water is
expensive.
•Advanced tertiary treatment facilities are required.
•Distributing recycled water to homes and parks
requires underground piping.
•New recycled water regulations are very stringent
on monitoring requirements.
•Beneficiary pays.
•Central San’s Board has requested that future
recycled water projects be cost-neutral to
ratepayers.
“Wastewater is the
last new water supply
in California.”
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C. PREFERENCE FOR LARGE
RECYCLED WATER USERS
•Central San’s Board previously indicated a preference for
projects with large recycled water demands over projects
with small recycled water demands.
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D. SEASONAL VS. YEAR-ROUND
RECYCLED WATER DEMAND
•Projects with year-round demand maximize Central San’s potential
opportunity to supply recycled water.
•California Senator Hertzberg has attempted several pieces of
legislation to ban wastewater discharges to the ocean/bays.
•Zero discharge is very challenging because supply and demand are inverted.
•There is no feasible means to store on-site (EBMUD or CCWD reservoirs would
require a higher level (potable reuse) of treatment).
•Central San’s Board has favored projects with year-round over
seasonal recycled water demand (limited to dry season capacity).
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E. FINITE VOLUME OF WASTEWATER IN DRY MONTHS
•Seasonal recycled water demand is highest when
influent wastewater flows are at their lowest.
•Commitment to recycled water projects is governed
by dry-season capacity.
•Other factors may further reduce dry-season
wastewater supply in the future.
•Governor can issue orders for water conservation during droughts.
•Senate Bill 606 (Hertzberg) and Assembly Bill 1168 (Friedman)
require reduction in indoor water consumption.
•Current proposal by Department of Water Resources is 47 gallons per
person per day (gpcd) by 2025 and 42 gpcd by 2030.
•Use of home gray water recycling is increasing.
Central San’s Board has favored projects with year-
round demand over seasonal use of recycled water,
limited to dry-season capacity.
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5. SUMMARY OF CURRENT COMMITMENTS
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CURRENT COMMITMENTS
•Plant Utility Water
•Zone 1
•DERWA Diversion (Temporary)
•Concord Community Reuse Project (Naval Weapons
Station Redevelopment) – Will Serve Letter
MOUs:
•Refinery Recycled Water Exchange Project
•Diablo Country Club SWRF
•Moraga Country Club SWRF
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6. POLICY QUESTIONS
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POLICY QUESTION #1
•Should staff continue in accordance with the previous Board
direction given regarding the commitment to serve the Concord
Naval Weapons Station Redevelopment?
•This includes:
•An additional Filter Plant infrastructure project (Phase 2 project to be
financed by the others);
•Central San is the producer and wholesaler. CCWD is the distributor
and retailer; and
•Committing approximately 2 MGD of dry-season recycled water supply
to the first phase of the development by 2035 and up to 6.3 MGD of
dry-season recycled water supply for the ultimate build-out of the
development in 2040+.
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POLICY QUESTION #2
•Should staff continue in accordance with the previous Board
direction given regarding continuation of the Refinery Recycled
Water Exchange project?
•This project has an MOU until June 30, 2022, which includes:
•Finalizing the cost allocation
•Completing the Preliminary Feasibility Evaluation Report
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POLICY QUESTION #3
•Should staff continue in accordance with the previous
Board direction given regarding the MOU for the Diablo
Country Club SWRF?
A. Does the Board want to continue the MOU for the Diablo
Country Club Golf Course for a cost-neutral SWRF Project?
B. Does the Board want to consider granting “Demonstration
Project” status to Diablo Country Club SWRF Project?
•Starting with a single demonstration project would allow Central San
to gauge impacts from this approach of diverting wastewater from the
collection system and returning the process solids (waste activated
sludge) before committing to additional SWRF Projects.
43
POLICY QUESTION #4
•Should staff continue in accordance with the previous
Board direction given regarding MOUs on Satellite Water
Recycling Facilities for other golf courses?
•Does the Board want to continue the MOU for the Moraga
Country Club Golf Course? (Currently on hold – no
communication since 2018.)
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POLICY QUESTION #5
•Should staff discuss or entertain new MOU requests for
SWRFs for other golf courses?
•Staff recently received a request from Rossmoor/Golden Rain
Foundation to execute an MOU for a cost-neutral SWRF Project.
•Other golf courses may express interest in similar MOUs.
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7. QUESTIONS/DISCUSSION/DIRECTION
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