Transcript Slide 1

MRWPCA Proposed
Groundwater Recharge
Project
By
Keith Israel, General Manager
Monterey Regional Water
Pollution Control Agency
and Bill Mills (Consultant)
March 21, 2005
Overview of Presentation Topics

General MRWPCA Background

Recycled Water Availability

Orange County Groundwater
Recharge Experience

Possible MRWPCA Project

Questions
LEGEND
MOSS
LANDING
Service Area
CASTROVILLE
MARINA
MARINA
SAND
CITY
PACIFIC
GROVE
BORONDA
SEASIDE
SALINAS
FORT
ORD
MILITARY
RESERVATION
MONTEREY
DEL
REY
OAKS
Recycled Water Production
13,500
14,000
10,000
AF/YR
12,000
10,000
8,000
6,000
4,000
2,000
0
Recycled Water for
Crops
Secondary Wastewater
to Bay
Recycled Purified Water for
Groundwater Recharge in
Orange County
Presentation Overview
Need for New Supplies
A History of Wastewater Recycling in OC
Why the Groundwater Replenishment
System
Coping with Public Perception
Permitting Concerns of Health Services
Project Costs
Future Water Shortages are
Predicted
Reliability of imported water
challenged by legal and
environmental issues
Large population increases in the
future
– By 2020 — Southern California: 7
million - California: 15 million
CA Department of Water Resources
predicts shortages by 2020
Waste Water Recycling - a
Visionary Concept in OC
Water Factory 21 – 1975
Irrigation Project – 1990
Waste Water Discharge to the
Ocean was Viewed as a Reliable
Water Source since the 1960s
Water Factory 21 was
conceived as a sea water
intrusion control project
Initiated Operations in 1975
First Advanced Indirect Potable Supply
Project in the World
Water Factory 21: A 15 mgd advanced
waste water reclamation facility, supplied
fresh water for sea water barrier
Since 1975 produced over
100,000 ac-ft of water that
blends with existing
groundwater
Over 25 years of operating
experience
Injected water is withdrawn
by municipal wells as
drinking water
Injected water meets all
drinking water standards
1/3 of product water treated
by Reverse Osmosis
In 1995, WF 21 was near the
end of its useful life and
technological advances could
substantially reduce cost
The Groundwater
Replenishment System (GWRS)
was conceived to provide a
new, reliable water supply
Concept: Secondary Treated
discharge to the Ocean would be
treated to Drinking Water
Standards and recharged into the
OC Groundwater Basin
GWRS must incorporate all
technological advances in
treatment technology since 1975
Seawater intrusion control and
recharge along the coast, and
Recharge in the interior of the
basin
Treat all water to Drinking Water
Standards
GWRS treatment technologies will incorporate
technology advances since WF 21 and treats
all water with Reverse Osmosis
Research behind the Project
Microfiltration as a Replacement for the
High Lime Process
Underground Retention and Travel Times
Membrane Advancements
Contaminants of Concern
Microfiltration
Water + contaminants
under pressure
S
S
S
S
S
S
Porous hollow
fiber
MF membrane
S S
S
S
S
S
S
Purified
Water
Reverse Osmosis
Technological Advances
RO Membrane Is Like a Microscopic
Strainer That Allows Water Molecules
to Pass Through
Water
Molecules
Protozoa
Bacteria
Virus
Inorganics
Organics
Ultraviolet light has been proven to
be safe & reliable for disinfection of
water.
Most effective when
preceded
by hydrogen
peroxide
UV light disinfects water inactivating microbial
pathogens through destruction of genetic material
Ultraviolet (UV) Doubles as
Disinfectant and Destroyer of
Contaminants of Concern
NDMA
1,4 Dioxane
with peroxide
addition
Xenobiotics?
Synthetic
Organic
Compounds
GWR System Advanced Water
Treatment Flow Diagram
OCSD
Secondary
Effluent
Microfiltration
(MF)
Reverse Osmosis
(RO)
Ultraviolet
+Peroxide
Purified
Water
Backwash
OCSD Plant 1
Brine
OCSD Outfall
Water Factory 21
flocculation
influent
carbon adsorption
filtration
blending
clarification
lime
recarbonation
reverse osmosis
CO2
sludge
recycled lime
transfer
thickening
recycled lime
recalcining
Public perception can stop or
shut-down the Recycling Project
Toilet to Tap !!
San Gabriel River Groundwater Recharge
Project
San Diego Repurification Project
Dublin/San Ramon (Clean Water Revival)
Project
LA’s East Valley Project
Perception can be managed
Determine Public View of Recycling
-Research thru Focus Groups and Surveys
Develop a Communication Program
-Target potential opposition groups
Invest in a well funded Public Relations Program
… an insurance program
Public acceptance comes with
understanding the need for recycling and
the effectiveness of the treatment
technology
State Department of Health
Services Approval Status
Received updated concept approval letter in
August 2002 and Permit in 2004
Grants concept approval for a 75% recycled
water project (25% dilution water)
Specifies a 2 year - phased approach to 100%
recycled water (no dilution water)
All Construction Contracts have
been awarded, project is
scheduled to begin operations
in 2007
Estimated Capital Cost
Construction Contracts:
Escalated Cost ($M)
Treatment Facilities
303.0
Equipment Engineering
0.8
Trailers
0.8
Temporary MF & Site Power
19.4
GWR Pipeline*
74.5
Barrier Facilities
16.6
Integrated Information System, Wells,
Workshops & Insurance
14.8
*3 contracts
ELA & Contingency
$57.0
Total
$486.9
Estimated Annual O&M Cost
Item
$ Million per Year
Power
11.5
Contract Maintenance
0.4
Chemicals
5.3
Plant Refurbishment
1.2
Membrane Replacement
2.8
UV Lamp Replacement
0.3
Compliance Monitoring
1.5
O&M Staff
3.6
Total
26.7
Federal, State, and Local
Funding
Grants
• EPA
• USBR
• SAWPA
• SWRCB
• DWR
Total Grants
SRF Loans
$ Million
0.5
20.0
37.0
5.0
30.0
$92.5
$145.0
Unit Cost in $/AF of Water
from GWRS
Capital O&M Total
With out subsidies:
40 385 425
With subsidies
Keys to successful
implementation of a recycled
water project are:
Developing a researched based public
outreach program that continues
throughout the implementation process
Treating the water to drinking water
quality
Establishing a need for additional water
Thank You.
END OF PRESENTATION
What Would a MRWPCA
Project Look Like?
 Treatment
Facilities
 Distribution
 Recharge
Pipeline
Area
Recharge with Recycled Water
is highly regulated and will
require an advanced level of
treatment, similar to
Water Factory 21 in
Orange County
Water Purification Plant
 Treatment
Tertiary Effluent
 Treatment
would include:
 Micro
Filtration (if needed)
 Reverse Osmosis
 Ultraviolet Disinfection
 Likely Located at RTP
 Brine
Discharged to Outfall
Distribution System
 New
Pump Station and
Pipeline
 Alignment
through Fort Ord
along General Jim Moore Road
 Pipeline
could be dual purpose
and carry recycled water
during irrigation season
Recharge
 Percolate
through soil for
extra treatment and
recharge of aquifer
 Several good locations at
Fort Ord
Surface Recharge Basin
in an Urban Area
Preliminary Estimates of Project
Timing, Sizing, and Cost
 Operate
 Up
in winter months
to 4,000 AFY
 Cost
could be in the
$1,000 - $1,100/AF range
 Project
compatible with
Joint Urban Recycled
Water Project with MCWD
Keys to successful
implementation of a recycled
groundwater project are:

Establish need

Utilize public outreach

Meet all Local/State/Federal
groundwater recharge standards
Next Steps





Construct monitoring wells near
recharge area
Determine best pilot recharge
location
Collaborate with other Agencies on
Recharge
Submit Prop 50 grant application
Schedule future visit to Orange
County for others
Changing Wastewater Into
Safe Water