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Preparing for a Water Audit

Preparing for a Water Audit. Thomas Pape Technical Advisor, AWE Principal, BMP Tom@a4we.org. Maximize Auditor Productivity and Minimize Cost. Pre-notify and Provide Access to Experts Facility Managers Bill Payer Cooling Tower Operators

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Preparing for a Water Audit

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  1. Preparing for a Water Audit Thomas Pape Technical Advisor, AWE Principal, BMP Tom@a4we.org

  2. Maximize Auditor Productivity and Minimize Cost • Pre-notify and Provide Access to Experts • Facility Managers • Bill Payer • Cooling Tower Operators • Production Managers (activities that affect water use) • Supervisors where significant water is used • Key holders

  3. Prepare and Access Records • Consumption Histories • Location of Water Meters • Tie water meters (accts.) to buildings, uses, operations • Sub-meters on major uses • Production history (?) • Equipment change history

  4. List of Expectations • Previous efficiency measures and activities • Planned or facility changes • Acceptable ROI parameters • Motivations for audit • Benefit/Cost analysis • Preferred and non-preferred retrofits

  5. Green Building Codes:Improving Water Efficiency Thomas Pape Technical Advisor, AWE Principal, BMP Tom@a4we.org

  6. Why are codes needed? • Standards only address the product itself; not how, when and where it is installed. • WaterSense is voluntary program • Federal standards are not based on local conditions • Rebates, vouchers and distributions can be costly

  7. Role of Codes • Codes do not replace: standards, ordinances, EPAct, WaterSense, vouchers, rebates, distributions …. • Codes enhance the overall strategy of water efficiency

  8. ICC International Green Construction Code IAPMO Green Plumbing & Mechanical Code Supplement • Supplements existing code, not stand alone code • Most compatible to own family of codes, but not exclusive • Very Comprehensive: Plumbing, HVAC, Appliances, Alternate water sources • Residential (some) and non-residential • Limited irrigation provisions

  9. IAPMO Green All residential and non-residential Prescriptive based water efficiency Easy to implement, inspect and enforce 1st Edition available ICC Green Only high-rise residential and non-residential Performance based water efficiency options Offers flexibility to builders & JHA In-progress Key Differences

  10. Sanitary Fixtures • Faucets – 0.5 to 1.5 gpm • Showerheads – 2.0 gpm/1800 ft2 • Toilets – tank 1.28 gpf*; flushometer 1.6 gpf *Non-commercial

  11. Appliances • Energy Star • WaterSense • Water Softeners • Use limits • Discharge water efficiency

  12. Water Pressure • 65 psi maximum (domestic uses)

  13. Commercial Kitchens • Icemakers > 50% water efficiency • Food Steamers < 2 gal/hr • Combo ovens <10 gph • Dipper wells (in-progress)

  14. Medical and Laboratory • No water tempering for sterilizers • X-ray process requires recycling • Exhaust hood scrubber - H2O re-circulation required

  15. Sub-meters Required • Irrigated landscape • Cooling towers • Boilers • Each building • Each tenant space • Processes using > 1,000gal/day

  16. Alternate Water Sources • Gray Water • Reclaim Water • Rainwater • Condensate recovery • Discharge water re-use

  17. Hot Water Distribution • Limiting cold water purge to 32 oz • Pipe insulation on HW pipes

  18. More Information Alliance for Water Efficiency a4we.org Tom@a4we.org Thomas Pape bmp4h2o@aol.com 510-325-7308

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