HomeMy WebLinkAbout07.c. (Revised) Satellite Water Recycling Facilities DCC Demonstration ProjectSatellite
Water Recycling Facilities
DCC Demonstration Project
February 18, 2016
Board Meeting
Item No. 7.c.
Danea Gemmell
Planning and Development
Division Manager
Jean-Marc Petit
Director of Engineering and
Technical Services
REVISED
DCC Demonstration Project
Satellite Water Recycling Facility
Implementation Models
1 .SWRF DCC
Finances/Owns/
Operates
2. SWRF DCC
Finances/Owns &
CCCSD Operates
3. CCCSD
Finances/Owns/ Operates
4. Public-Private Partnership (P3) – Third Party Finances/Owns/ Operates
5. Regional Water Partnership
Satellite Water Recycling Facility Concept
Membrane Filtration
& Disinfection
Process
Recycled
Water
Storage
Pumped
Wastewater
Withdrawal
Lateral
Process Solids
Returned to
Collection System
CCCSD Collection System
Screenings
Hauled Off-Site
Chemical/Supplies
Deliveries to Site
1 –DCC Finances/Owns/Operates
SWRF (Current MOU)
Pros Cons
•Lowest risk to CCCSD
•Does not require CCCSD capital
funds
•Does not impact CCCSD borrowing
capacity
•Does not require CCCSD O&M staff
and resources
•Reduced effluent discharge
•Raw wastewater availability may
not meet DCC needs
•Nearby agency concerns
•Potential impacts on collection
system and treatment plant O&M
•Potential zoning concerns
2 –DCC Finances/Owns SWRF&
CCCSD Operates
Pros Cons
•Does not require CCCSD capital
funds
•Does not impact CCCSD
borrowing capacity
•Reduces nearby agency concerns
(e.g. odors, SSOs)
•Reduced effluent discharge
•Requires additional CCCSD O&M
staff and resources
•CCCSD potentially responsible for
regulatory compliance
•Raw wastewater availability may
not meet DCC needs
•Potential impacts on collection
system and treatment plant O&M
•Potential zoning concerns
3 – CCCSD Finances/Owns/Operates
Pros Cons
•CCCSD has experience
owning/operating WWTPs
•Reduces nearby agency
concerns (e.g. odors, SSOs)
•Eligible for SRF loan
•Eliminates potential zoning
concerns
•Reduced effluent discharge
•Requires long-term, secure form of
debt repayment
•Potential impact on CCCSD future
borrowing capacity
•Requires additional CCCSD staff and
resources
•CCCSD responsible for all regulatory
compliance
•Raw wastewater availability may not
meet DCC needs
•Potential impacts on collection
system and treatment plant O&M
4 – Public Private Partnership (P3) –
Third Party Finances/Owns/Operates
Pros Cons
•Lower risks to CCCSD
•Does not require CCCSD capital funds
•Does not impact CCCSD borrowing
capacity
•Does not require CCCSD O&M staff and
resources
•P3 experienced in owning/operating
WWTPs
•Private partnership interest exists
•Reduced effluent discharge
•Contract operations
•Raw wastewater availability
may not meet DCC needs
•Potential impacts on
collection system and
treatment plant O&M
•Potential zoning concerns
5 – Regional Water Partnership
(“Water Wheeling”)
Pros Cons
•Centralized recycled water production
(Utilization of existing Filter Plant))
•Optimizes O&M efficiency
•Offset refinery recycled water project
costs
•Lower cost recycled water compared to
SWRF (economies of scale)
•Eligible for SRF loan & better positioning
for grant funding
•Raw wastewater availability nearly
guaranteed
•Reduced effluent discharge
•More complex
coordination/agreements
between water agencies
•State concurrence on water
offset concept
•Longer implementation
schedule
Shell
Refinery Tesoro
Refinery
CCCSD
DCC
Regional Water Partnership
(“Water Wheeling”) for DCC
Implementing
DCC SWRF Demonstration Project
Financial
Operations and
Maintenance
Impacts
SWRF DCC
Impacts
Legal and
Regulatory
Public
Perceptions
Financial
Risks Mitigations
1.How to ensure full cost recovery
of services?
2.How guarantee repayment of
debt service?
3.What is impact on District Debt
Capacity and Credit Rating?
4.Will O&M costs be considered
too high over time?
5.How to ensure replacement costs
of SWRF infrastructure are
funded in the future?
1.Follow EBMUD R.A.R.E
financial model
2.Senior Debt on DCC property
and a payment reserve
3.This must be a cost neutral
project for District
4.Meet annually and include in
agreement
5.Set up a replacement fund as
part of payment plan
O&M
Risks Mitigations
1.Increased maintenance of
collection system
2.Responsibility for complaints
(e.g. odor, traffic)
1.Maintain minimum flow and
velocity in collection system
downstream of diversion
structure
2.Develop SOPs to respond to
odor complains and set up
truck deliveries in off hours
SWRF DCC Impacts
Risks Mitigations
1.Raw wastewater
availability may not meet
DCC needs
2.Interruption of Service:
Operations or technical
issues
3.Water Quality may not
meet DCC expectations
for end use
1.DCC to build additional on site
storage during periods of low
flow and use EBMUD water
supply to supplement need
2.DCC to build additional on site
storage during periods of low
flow and use EBMUD water
supply to supplement need
3.Include agronomist and turf
specialist on the peer review
team when design SWRF and
train DCC staff on WQ needs
Legal and Regulatory
Risks Mitigations
1.Will recycle water offsets
(Wheeling concept) be
challenged?
2.Ongoing Title 22 Compliance.
3.CEQA challenges for SWRF
Facility
4.Who owns spills and non-
compliance?
1.Only applicable to Model 1 No
position available at this time
2.SWRF design criteria and
training of operation staff
3.Only applicable to Models 1,
2, and 4
4.Only applicable to Models 1, 2
and 4
Public Perception
Risks Mitigations
1.What is the benefit of the
project for the public at
large?
2.Treatment facilities in
residential neighborhoods
(NIMBY)
1.Alternate source of water
supply and meet Gola and
reducing discharge to Suisun
Bay
2.SWRF to be located inside a
building on DCC property
QUESTIONS