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Fresh Water Supply Alternatives and Technologies Community Advisory Committee Meeting September 28, 2011 Hinkley, Calif PowerPoint Presentation
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Fresh Water Supply Alternatives and Technologies Community Advisory Committee Meeting September 28, 2011 Hinkley, California. Malcolm Pirnie’s Water Division is a subsidiary of ARCADIS, a global science and engineering consulting firm working in more than 100 countries

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Fresh Water Supply Alternatives and Technologies Community Advisory Committee Meeting September 28, 2011 Hinkley, Calif


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Fresh Water SupplyAlternatives and Technologies Community Advisory Committee MeetingSeptember 28, 2011Hinkley, California
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Malcolm Pirnie’s Water Division is a subsidiary of ARCADIS, a global science and engineering consulting firm working in more than 100 countries

  • Over 100 years experience designing, building and managing water treatment and water supply systems
  • Broad experience at all scales of water supply applications, from rural systems to municipal and regional networks

ARCADIS &

Malcolm Pirnie

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Basic

Fresh Water Supply Alternatives

Tie into Golden State Water Company

Central water treatment and distribution

Whole house water treatment

Add option of deeper wells

Trucking water

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Option 1Tie into Golden State Water Company (GSWC)

  • GSWC supplies potable water to Barstow
  • Water is treated and meets current drinking water standards
  • Build a 12-mile pipeline to carry water from Barstow to Hinkley
  • Store and distribute water using a network of pipelines, tanks and pumps
option 1 tie into golden state water company
Option 1Tie into Golden State Water Company

ADVANTAGES

  • Source is public water system with known water quality
  • Water is treated and monitored for drinking water standards

DISADVANTAGES

  • Substantial time and cost required to construct transmission line and network of distribution pipelines
  • Additional water quality monitoring may be required
  • Long transit may cause water quality deterioration
  • Loss of independent water supply
option 2 central treatment and distribution
Option 2Central Treatment and Distribution
  • Would require drilling new supply wells
  • Water will be treated and disinfected at a central treatment facility
  • Treated water will be delivered to homes through a network of pipelines, tanks and pumps
option 2 central treatment and distribution1
Option 2Central Treatment and Distribution

ADVANTAGES

  • Water is treated and monitored for drinking water standards
  • Treatment can be tailored to the water quality of the new wells
  • New infrastructure for the area
  • New infrastructure for the community

DISADVANTAGES

  • Challenge to locate and develop reliable, long-term supply wells
  • Substantial time and cost required to construct transmission line and network of distribution pipelines
  • State law requires system to be managed as a formal water utility
option 3 whole house water treatment
Option 3Whole House Water Treatment
  • Treat and disinfect water entering the homes
  • Treatment would include ion exchange media or reverse osmosis (RO) filters that are placed outside the homes and connect to the existing supply lines
  • Equipment provider would conduct the necessary monitoring and maintenance
option 3 whole house water treatment1
Option 3Whole House Water Treatment

ADVANTAGES

  • Relatively less implementation time and cost
  • Equipment Federal/State certified
  • Water equipment vendor maintains the equipment
  • Local control

DISADVANTAGES

  • Water quality varies well to well
  • May require multiple treatment stages (pre-filter, core treatment, post-filter)
  • Some systems can generate waste streams that may need to be disposed to the septic tanks
  • Must be installed on the property
  • Requires performance testing
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Option 3Whole House Water Treatment

  • Next steps to pilot test equipment:
  • Evaluate range of options for whole house water treatment
  • Select candidate systems for pilot testing
  • Pilot testing to begin in November 2011
option 4 deeper wells
Option 4Deeper wells

ADVANTAGES

  • Familiar approach
  • Maintain existing plumbing
  • May produce better quality?

DISADVANTAGES

  • Construction impacts
  • Groundwater is in an “over draft” condition in many parts of the Mojave Basin
  • Experts unsure about yield on west side
  • May not produce better quality?
option 5 trucking of water
Option 5Trucking of Water

ADVANTAGES

  • Easy to start-up
  • Obtain high quality water

DISADVANTAGES

  • Uses lots of gas
  • Traffic impacts
  • Regular deliveries
  • Must insure quality is maintained during delivery
  • Tanks needed at houses or more frequent deliveries
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Next Steps in Evaluation Process

  • Gather stakeholder views
  • Continue evaluation of options
  • Coordinate with Regional Water Quality Control Board
  • Coordinate with California Department of Public Health
  • Conduct pilot testing of treatment devices
  • Refine construction and time estimates