Air Liquide

Alaska-Department of Transportation and Public Facilities

Amoco Chemical

AT&T

Booz Allen Hamilton

CH2M HILL

Carter Burgess Corporation

Chicago Transit Authority

City of Golden, CO

City of Longmont, CO

City of Tracy, CA

Colorado Department of Transportation

Denver Water

Felsburg, Holt & Ullevig

ICF Kaiser Hanford

Idaho Transportation Department

Louisville, KY Metropolitan Sewer District

Memphis Area Transit Authority

Muller Engineering

Palm Beach County (FL) Water Facility

SEH Engineering

Regional Transportation District-Denver

Saudi Aramco

Shell Chemical

Shell Oil

Tri-County Metropolitan Transportation District of Oregon

U.S. Army Corps of Engineers-Omaha District

U.S. Department of Energy-Albuquerque, Chicago, Lawrence Livermore, Richland, Oak Ridge

U.S. Department of Interior-National Park Service

U.S. Department of Interior-Bureau of Reclamation