Jump to main content.


GEMS/AIR Information

Note: EPA no longer updates this information, but it may be useful as a reference or resource.


** Principal contact - David Calkins (WHO Consultant) **
Phone: (925) 254-5942
Internet e-Mail: davecalkins@home.com


  • GEMS/AIR Twinning - What's New
  • GEMS/AIR (WHO) Information
  • GEMS/AIR (WHO) Twinning Program Information

  • lMAT Navigation


    Jump to main content.