PG

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• PGEs Water-Embedded Energy Pilot
• Low Income Oversight Board
• Watsonville, CA
• January 17, 2007
• Gerry Hamilton
• PGE

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Water-Embedded Energy PilotWhat is this

• April 13, 2006 The CPUC announces it will
  examine the embedded (or upstream) energy
  savings associated with water efficiency
• A Workshop, Comments and Replies on
  water-embedded issues occurred over the Summer of
  2006 surfacing opportunities and issues.
• October 16, 2006 the CPUC directed the Investor
  Owned Utilities propose a pilot on January 15,
  2007
• Total funding 10 million (PGE 4.4 million)
• Duration 12 months starting July 1, 2007
• Could examine water conservation, ways to use
  less energy intensive water, or improve water
  distribution and treatment systems
• Partner with one (or more) large water providers

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The Water-Embedded Energy PilotKey Objectives

• Critical issues were raised that the Pilot must
  address
• Can Electric IOUs and Water agencies effectively
  partner?
• Coordinate program design
• Improve water-energy program delivery
• Achieve larger energy savings
• Can the water-embedded energy savings be
  measured?
• PGE has partnered with water agencies in the
  past looks forward to more durable and effective
  partnerships
• Measuring water-embedded energy savings to an
  acceptable degree of precision is the critical
  challenge
• Without developing reliable and accurate
  measurements and measurement methods, savings
  cant be verified hampering program development
  for 2009
• Complex water distribution systems and water
  industry institutions may require realistic
  trade-offs between reasonably accurate average
  savings estimates and highly accurate but
  expensive incremental savings estimates

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PGEs Water-Embedded Energy Pilot Proposal

• PGE plans to
• Partner with three water diverse water agencies
  EBMUD, Sonoma Water District, Santa Clara County
  Water District
• Seek a variety of commercial, agricultural,
  industrial, or institutional sites with
• Significant water savings potential
• Supply configuration able to measure changes in
  water usage (both inflows and outflows)
• Obtain extensive data on water and energy
  used/saved for distribution and fresh- and
  waste-water treatment
• Sites could include Schools, Food Processing,
  Food Service, Laundries, Manufacturing, Health
  Services, and Multi-family Low Income Housing or
  other suitable facilities
• Work with water agencies and the CPUC to develop
  satisfactory methods for measuring saved
  water-embedded energy

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Low Income Market Possibilities
Based on ave. water-embedded energy intensity of
5,411 kWh/million gallons per CEC study.
http//www.energy.ca.gov/pier/final_project_report
s/CEC-500-2006-118.html
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Examples of Achieving Water-Embedded Energy