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7C

VIEWS: 5 PAGES: 45

									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
          PACIFIC              CITY
          GROVE                                                  BORONDA




                                 SEASIDE
                                                                           SALINAS


                                                 FORT
                    MONTEREY                     ORD
                                               MILITARY
                                             RESERVATION
                                      DEL
                                      REY
                                      OAKS
        Recycled Water Production
                        13,500
        14,000
        12,000                                10,000
AF/YR




        10,000
         8,000
         6,000
         4,000
         2,000
            0
                 Recycled Water for   Secondary Wastewater
                       Crops                 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   S

                    S
                            S       S   S
                                S
                                    S

Porous hollow
    fiber
                                        Purified
MF membrane
                                         Water
   Reverse Osmosis
Technological Advances
   RO Membrane Is Like a Microscopic
   Strainer That Allows Water Molecules
   to Pass Through
                                  Water
Protozoa                          Molecules




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
                                                Ultraviolet
            Microfiltration   Reverse Osmosis   +Peroxide
  OCSD          (MF)                (RO)
Secondary                                                     Purified
 Effluent                                                      Water




              Backwash            Brine
             OCSD Plant 1       OCSD Outfall
                      Water Factory 21
             flocculation                                carbon adsorption
influent
                                    filtration

                                                                             blending




            clarification
                                   recarbonation          reverse osmosis
     lime
    sludge                                               CO2


                                                                   recycled lime

              transfer          thickening         recalcining
                    recycled lime
 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,
                                                                    14.8
  Workshops & Insurance
                           ELA & Contingency                      $57.0
                                          Total                  $486.9


*3 contracts
        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             $ Million
  • EPA                  0.5
  • USBR              20.0
  • SAWPA             37.0
  • SWRCB                5.0
  • DWR               30.0
Total Grants         $92.5
SRF Loans           $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   Pipeline

 Recharge   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
 Alignmentthrough Fort Ord
 along General Jim Moore Road
 Pipelinecould 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   in winter months
  Up   to 4,000 AFY
  Costcould 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

								
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