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Point-of-Use (POU) Treatment: A Viable Inorganics Compliance Strategy for Small Systems

2004 RMSAWWA/RMWEA Annual Conference Grand Junction, Colorado. Point-of-Use (POU) Treatment: A Viable Inorganics Compliance Strategy for Small Systems. Warren J. Swanson, P.E. Schmueser gordon meyer, inc. Glenwood Springs Aspen Crested Butte Meeker . This Presentation Will….

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Point-of-Use (POU) Treatment: A Viable Inorganics Compliance Strategy for Small Systems

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  1. 2004 RMSAWWA/RMWEA Annual Conference Grand Junction, Colorado Point-of-Use (POU) Treatment:A Viable Inorganics Compliance Strategyfor Small Systems Warren J. Swanson, P.E. Schmueser gordon meyer, inc. Glenwood Springs Aspen Crested ButteMeeker

  2. This Presentation Will… • Show how POU treatment can be a real compliance option for small systems • Share experiences of a small community in: • getting the approach approved • developing an implementation plan • Identify available resources

  3. What is POU (& POE) Treatment? POU is Point-of-Use “Under the Sink” POE is Point-of-Entry “Whole Home”

  4. The POU/POE Approach Trade-off… Centralized Treatment POU/POE Treatment High Capital Cost Logistical Challenges

  5. Mt. Princeton Homeowners’ Association • MPHOA • 50 residences on flanks of Mt. Princeton • > 15 taps or 25 residents, year-round Community Water System • Receives water from MP Hot Springs Resort Photo: www.coloradofourteeners.org

  6. Mt. Princeton Hot Springs is a High-Quality Source….

  7. …except for High Fluoride MPHS Fluoride: 9 mg/L Fluoride Max. Contaminant Level (MCL): 4 mg/L Fluoride Secondary MCL: 2 mg/L State of Colorado Enforcement Order May 30, 2003 Prelim. Design Report in 4 mons. Fully Implement Solution in 7 mons.

  8. Centralized Treatment Not Feasible High-fluoride Influent, 75 gpm Waste Stream? Activated Alumina Regeneration Chemicals Treated Raw Water • Land • Building • Treatment Equipment • Chemicals • Waste Disposal Option • Increased O&M Capital Cost of about $5,000 per Household!!

  9. Why Mt. Princeton HOA Pursued POU… • Affordability • Treat only cooking and drinking water • $550 per household • Limited Waste Disposal • Fluoride not concentrated much • No Additional Land Required • State of Colorado Willing to Accept the Approach

  10. Not Suitable for Microbial Contaminants Site-Specific Pilot-Testing of Units State POU/POE Strategy Guidelines ANSI/NSF- Approved Units Water System Ultimately Responsible Operations & Management Plan Automatic Warning on Units

  11. MPHOA Selected Reverse Osmosis Units NSF 58-Approved System 2-Gal. Tank (rated to 120 psi) 5-micron Cartridge Pre-Filter Reverse Osmosis Membrane Dedicated Faucet w/Cond.- Based Quality Monitor & Built-in Siphon Break Activated Carbon Pre-Trtmnt. Activated Carbon Post-Trtmnt.

  12. Pilot Test Demonstrated Performance

  13. Operations & Management Plan Contents • Keys to Program Success • Division of Responsibilities • Installation / Start-up • Training • O & M • Monitoring • Record Keeping • Communications

  14. Keys to POU Approach Success • Homeowner cooperation! • Good communication! • Access to units! • Licensed installers & operators! • Solid performance monitoring plan! • Proper reporting to State!

  15. Division of Responsibilities… Report Problems Home mod. costs Check Units Compliance Activities Don’t Tinker All O&M, Management Provide Access & Space Furnish & Own Devices Be Coach-able Bear Final Responsibility WATER PROVIDER CUSTOMERS

  16. POU Treatment Unit Installation Plan POU Treatment Unit Manufacturer’s Representative Training Activity #1 Certified Master Plumber Licensed Water Sys. Operator Training Activity #2 Installation and Training Throughout Community

  17. Operations & Maintenance Plan Should… • Clearly assign responsibilities • Equip. provider, plumber, operator • Establish schedules • Maintenance visits • Unit replacement activities • Establish spare parts inventory • Set responsibility for waste disposal

  18. Three Levels of Monitoring Level 3 Level 2 Level 1 Routine Check Regulatory Compliance Breakthrough Warning Purpose Annual, Flexible Every 3 Yrs. Schedule Continuous Unit Service Provider Licensed Water Op. Homeowner Sampler Parameter Field Method Approved Method Auto-Monitor, Surrogate Method Note

  19. Communications Plan • Schedule regular maintenance visits at annual HOA meeting • Send out reminder cards in advance of service visits • Distribute contact list to residents • Provide feedback on program success and importance to all residents • Make sure new residents are indoctrinated!

  20. Additional Information • “Guidance for Implementing a POU or POE Treatment Strategy for Compliance with the SDWA” • http://www.epa.gov/safewater/standard/draftguid_pou_poe.pdf • State Primacy Agency

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