Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends,...
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Transcript of Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends,...
![Page 1: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/1.jpg)
Zone 7 Water Agency
Zone 7’s
Salt Management PlanPast, Present & Future
May 9, 2012
Kurt Arends, P.E.AGM Engineering and OperationsZone 7 Water Agency
![Page 2: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/2.jpg)
Salt Management Plan History May 2012
Presentation Outline
• Who is Zone 7 Water Agency
• Existing Salt Management Plan
• Challenges
• SMP Outcome
• Implementation progress
• Current SMP efforts
![Page 3: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/3.jpg)
Salt Management Plan History May 2012
About Zone 7: Service Area
Delta
Dublin
San Ramon
Pleasanton
LivermoreDSRSD
Pleasanton
Livermore
Cal Water
• Service Area: 430 mi2
• Wholesale water to approx. 220,000 residents in Dublin, Pleasanton, Livermore and the parts of San Ramon
• Service to four retailers
• 3,500 acres of Agricultural
• Groundwater Basin Manager
• Regional Flood protection for Eastern Alameda County
![Page 4: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/4.jpg)
Salt Management Plan History May 2012
Who is Zone 7?
Average Surface Water Supply:
87% of Supply viaSouth Bay Aqueduct
13% of Supply viaArroyo del Valle
Arroyo Valle
South Bay Aqueduct
![Page 5: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/5.jpg)
Salt Management Plan History May 2012
Who is Zone 7?
Groundwater:
Groundwater BasinManager
(over 40 years)
126,000 acre-feetof Operational
Storage
Current SustainableYield: 13,400 acre-feet
Arroyo Mocho
Arroyo Valle
Arroyo Las
Positas
![Page 6: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/6.jpg)
Salt Management Plan History May 2012
About Zone 7: Water Facilities
DV WTP40 mgd
PP WTP19 mgd
SBA
WELLS40 mgd
DoughertyReservoir
![Page 7: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/7.jpg)
Salt Management Plan History May 2012
Challenges in early 1990s
• Additional water supply needed to meet projected demands
• Need to expand wastewater export capacity
Zone 7 and the two wastewater management agencies co-sponsored a Water Recycling Study
![Page 8: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/8.jpg)
Salt Management Plan History May 2012
Water Recycling Study -1992
• Zone 7, City of Livermore and Dublin San Ramon Services District Completed the Study
• Recognized recycled water as a viable source
• Recognized need to protect the Groundwater Basin Water Quality
• Master Water Recycling Permit from RWQCB
• Master Permit required Salt Management Plan
![Page 9: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/9.jpg)
Salt Management Plan History May 2012
Sources of Salt
• Stream inflows
• Subsurface groundwater inflow from fringe basins
• Urban and Agricultural Irrigation with imported water
• Adding Irrigation with Recycled Water
![Page 10: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/10.jpg)
Salt Management Plan History May 2012
Salt Management Plan Process (1994-1999)
• Zone 7 was Lead Agency
• Developed through a collaborative process
• Formed a Technical Advisory Group
• Groundwater Management Advisory Committee
• Data compilation, analysis and presentations 1994 through 1999
• In 1999, Zone 7 Board approved a Salt Management Strategy
![Page 11: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/11.jpg)
Salt Management Plan History May 2012
Challenges during the SMP development (1994-99)
• Technical challenges
– Mass balance approach
– How to Include All Salt Sources
• Economic Challenges/Who should pay?
– Users over the Main Basin vs outside the Main Basin
– Existing users vs future users
– Result: Groundwater Basin beneficiaries should pay
![Page 12: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/12.jpg)
Salt Management Plan History May 2012
Challenges during the SMP development (1994-99)
• Other challenges
– Implementation impacts and benefits
o water rates
o delivered water quality
– Growth vs no growth
• TAG and GMAC helped formulate policy goals and recommendations to our Board
![Page 13: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/13.jpg)
Salt Management Plan History May 2012
Adopted SMP Policy Goals -1999
• Mitigate existing and future salt loading
• Maintain or Improve delivered water Quality
• Provide comparable delivered water quality to all retailers
• Provide a mechanism to offset salt loading associated with recycled water use
• Minimize O&M cost through adaptive management process & long term goals
Developing Policy goals helped screen salt management strategies
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Salt Management Plan History May 2012
Analyzed SMP Strategies
• Increased conjunctive Use (The Core Strategy)
• Wellhead Demineralization w/ brine export
• Demineralize Recycled water and Inject into GW Basin – Failed due to public opposition
• Delta Fix - lower TDS import water (may improve
salt balance but not in Zone 7 control)
• High TDS GW export via streams – Failed due to potential downstream impacts
![Page 15: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/15.jpg)
Salt Management Plan History May 2012
Zone 7 Board Approval and Implementation
• In August 1999 Zone 7 Board approved SMP
– Increased conjunctive use with wellhead demineralization
• Strategy:
– Mitigate existing and future salt loading
– Maintain or Improve delivered water quality
– Annual salt management decisions made through operations planning to provide flexibility to minimize cost and achieve long term goal
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Salt Management Plan History May 2012
RWQCB Approval of SMP and Water Recycling
• In June 2004, the Three co-permittees submitted the Salt Management Plan for RWQCB approval
• In September 2004, RWQCB Approved the SMP
![Page 17: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/17.jpg)
Salt Management Plan History May 2012
SMP Implementation Progress
• Initiated increased conjunctive use in 2000
• In 2003 Initiated the planning and permitting for
Wellhead Demineralization Facility
• In 2005 prepared GWMP for the Basin and incorporated the 2004 SMP by reference
![Page 18: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/18.jpg)
Salt Management Plan History May 2012
SMP Implementation Progress
• In 2009 Wellhead Demineralization Facility came online
– 6.1 MGD permeate, 1.5 MGD brine– Capital Cost ~$36M and O&M cost ~$1.5M/year– Up to 3,000-4,000 tons net salt removed/year
• Full SMP Implementation needs additional recharge capacity
– Use of Chain of Lakes after 2030
![Page 19: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/19.jpg)
Salt Management Plan History May 2012
Mocho Demineralization Plant
Mocho Demineralization Plant
![Page 20: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/20.jpg)
Salt Management Plan History May 2012
Mocho Demineralization Plant
Produces 6.1-million gallons per day of permeate water by Reverse Osmosis to be blended with bypass GW
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Salt Management Plan History May 2012
Recent SMP Related Developments
• In 2009, SWRCB Issued Recycled Water Use Policy requiring
– Basins with Recycled water to have an approved SMP by May 2014
– SMPs to include Nutrient Management plans and CEC Monitoring plans
• Zone 7 has RWQCB approved SMP (since 2004)
![Page 22: Zone 7 Water Agency Zone 7’s Salt Management Plan Past, Present & Future May 9, 2012 Kurt Arends, P.E. AGM Engineering and Operations Zone 7 Water Agency.](https://reader035.fdocuments.net/reader035/viewer/2022081511/551b4c34550346d41a8b5d2b/html5/thumbnails/22.jpg)
Salt Management Plan History May 2012
Recent SMP Related Developments
• Zone 7 SMP needs amendment to include
– Nutrient Management Plans
– Monitoring plan for CEC
– GW Basin Recharge area map
• Plans to amend the SMP by January 2014
– Working with RWQCB and other sister agencies
– Held workshop with RWQCB and agencies
– Coordinating with agencies on consistent approach